Invention name: Disc brake
Technical field
[0001]
　The present invention relates to a disc brake.
　This application claims priority based on Japanese Patent Application No. 2019-155490 filed in Japan on August 28, 2019, the contents of which are incorporated herein by reference.
Background technology
[0002]
　In a disc brake having a structure in which a protruding portion of a friction pad is inserted into a concave pad guide portion of a mounting member to support the disc brake, the friction pad is urged by a pad spring (see, for example, Patent Documents 1 and 2 below). ).
Prior art literature
Patent documents
[0003]
Patent Document 1: Japanese Patent Application Laid-Open No. 8-226470
Patent Document 2: Japanese Patent Application Laid-Open No. 6212758
Outline of the invention
Problems to be solved by the invention
[0004]
　In the disc brake, it is desired to suppress the slight pressure squeal which is a brake squeal generated at the time of the slight pressure braking.
[0005]
　An object of the present invention is to provide a disc brake capable of suppressing a micro pressure squeal generated during micro pressure braking.
Means to solve problems
[0006]
　In order to achieve the above object, the present invention has adopted the following aspects.
　That is, one aspect of the present invention is a disc brake that brakes the rotation of a disc that rotates together with the wheels of a vehicle, the rotation direction of the disc is the disc rotation direction, and the extension direction of the central axis of the disc is the disc axis direction. When the center side along the radial direction of the disc is the inner side in the radial direction of the disc and the side opposite to the central side along the radial direction of the disc is the outer side in the radial direction of the disc, the non-rotating portion of the vehicle. It has a mounting member having a pad guide portion having a shape recessed in the disc rotation direction, and a protruding portion inserted into the pad guide portion, and the protruding portion is guided to the pad guide portion. A pair of friction pads that can be moved in the direction of the disc axis, a caliper that is slidably provided with respect to the mounting member and presses the pair of friction pads on both sides of the disc, and the mounting member. With a pad spring that is attached to and elastically supports the friction pad, the pad guide portion is located in the area inside the disc radial direction at the bottom of the pad guide portion and in the region outside the disc radial direction. The pad spring has a concave portion recessed in the disc rotation direction from the bottom surface, and the pad spring is provided so as to be able to come into contact with the wall surface outside the disc radial direction of the pad guide portion and the bottom surface. It has a guide portion that guides movement along the disc axis direction, and a fitting portion that protrudes from the guide portion in the disc rotation direction and elastically fits into the concave portion.
The invention's effect
[0007]
　According to the above aspect of the present invention, it is possible to suppress the micro pressure squeal generated during the micro pressure braking.
A brief description of the drawing
[0008]
FIG. 1 is a perspective view showing a disc brake according to the first embodiment of the present invention.
FIG. 2 is a view of the disc brake as seen from the arrow A in FIG. 1, and is a rear view excluding the caliper.
FIG. 3 is a front view of the disc brake as viewed from arrow B in FIG.
FIG. 4 is an enlarged rear view showing a portion C of FIG. 2 of the disc brake.
[Fig. 5] Fig. 5 is a perspective view showing a pad spring of the disc brake.
[Fig. 6] Fig. 6 is a view showing a pad spring of the disc brake, and is a side view with a part omitted.
FIG. 7 is a view showing a main part of a disc brake according to a second embodiment of the present invention, and is an enlarged rear view corresponding to FIG. 4. FIG.
Embodiment for carrying out the invention
[0009]
[First Embodiment] The first embodiment
　of the present invention will be described below with reference to FIGS. 1 to 6. The disc brake 10 of the first embodiment shown in FIGS. 1 to 3 is for a vehicle such as an automobile, and applies a braking force to the vehicle, specifically, for front wheel braking of a four-wheeled vehicle. Can be used. The disc brake 10 brakes the running of the vehicle by stopping the rotation of the disc-shaped disc 11 that rotates together with the wheels (not shown).
[0010]
　As shown in FIG. 1, the disc brake 10 includes a mounting member 21, a caliper 22, and a pair of boots 23. Further, as shown in FIGS. 2 and 3, the disc brake 10 includes a pair of friction pads 25 and four pad springs 26.
[0011]
　Hereinafter, the central axis of the disk 11 is referred to as a disk axis, the direction in which the disk axis extends is referred to as a disk axis direction, the radial direction of the disk 11 is referred to as a disk radial direction, and the circumferential direction of the disk 11, that is, the rotation direction is referred to as a disk rotation direction. Further, the center side of the disk 11 in the radial direction of the disk is referred to as the inside in the radial direction of the disk, and the side opposite to the center of the disk 11 in the radial direction of the disk is referred to as the outer side in the radial direction of the disk. Further, the central side in the disc rotation direction is referred to as the inside in the disc rotation direction, and the side opposite to the center in the disc rotation direction is referred to as the outside in the disc rotation direction. Further, the inlet side of the disc brake 10 in the disc rotation direction R when the vehicle (not shown) moves forward is referred to as the disc rotation direction entry side. Further, the exit side of the disc brake 10 in the disc rotation direction R when the vehicle is moving forward is referred to as the disc rotation direction exit side. Further, a line along the disc radial direction through the disc axis and the center position of the length along the disc rotation direction of each of the mounting member 21 and the caliper 22 is referred to as a radial reference line. This radial reference line is orthogonal to the disk axis. Further, the outside in the vehicle width direction of the vehicle is referred to as the outer side, and the inside in the vehicle width direction is referred to as the inner side.
[0012]
　As shown in FIG. 2, the mounting member 21 has an inner beam portion 31, a pair of inner side torque receiving portions 32, and a pair of pin insertion portions 33. Further, as shown in FIG. 3, the mounting member 21 further includes a pair of outer side torque receiving portions 36 and an outer beam portion 37. The mounting member 21 has a mirror-symmetrical shape with respect to the center in the disk rotation direction.
[0013]
　As shown in FIG. 1, the inner beam portion 31 is attached to a non-rotating portion of the vehicle in a state of being arranged on one side in the disc axis direction with respect to the disc 11. Here, the non-rotating portion of the vehicle to which the mounting member 21 is mounted is arranged on the inner side of the disc 11. The inner beam portion 31 attached to the non-rotating portion is also arranged on the inner side of the disc 11. As shown in FIG. 2, the inner beam portion 31 is arranged so as to extend in the disk rotation direction. A pair of mounting boss portions 42 having mounting holes 41 along the disc axis direction are provided on both sides of the inner beam portion 31 in the disk rotation direction. The inner beam portion 31 is attached to the non-rotating portion of the vehicle in the pair of mounting boss portions 42.
[0014]
　One of the pair of inner side torque receiving portions 32 extends outward in the disc radial direction from one end of the inner beam portion 31 in the disc rotation direction. Further, the other of the pair of inner side torque receiving portions 32 extends from the end of the inner beam portion 31 on the other side in the disc rotation direction toward the outside in the disc radial direction. The pair of inner side torque receiving portions 32 are arranged on the inner side of the disc 11 as in the inner beam portion 31.
[0015]
　As shown in FIG. 1, one of the pair of pin insertion portions 33 is located on the outer peripheral side of the disc 11 in the disc axial direction from the outer end portion of the inner side torque receiving portion 32 on one side in the disc rotation direction in the disc radial direction. It extends to the outer side across the. Further, the other end of the pair of pin insertion portions 33 straddles the outer peripheral side of the disc 11 in the disc axial direction from the outer end portion of the inner side torque receiving portion 32 on the other side in the disc rotation direction in the disc radial direction to the outer side. It is extended.
[0016]
　As shown in FIG. 2, one inner side torque receiving portion 32 and one pin inserting portion 33 connected to the inner side torque receiving portion 32, and the other inner side torque receiving portion 32 and the other pin inserting portion 33 connected to the inner side torque receiving portion 32, respectively. Is formed with a pin insertion hole 43 extending along the disc axis direction. Each of these pair of pin insertion holes 43 is formed from the end surface of the inner side torque receiving portion 32 on the inner side to an intermediate position of the pin insertion portion 33.
[0017]
　A pair of slide pins 45 on both sides of the caliper 22 shown in FIG. 1 in the disk rotation direction are slidably fitted into the pair of pin insertion holes 43 provided in the mounting member 21. As a result, the mounting member 21 slidably supports the caliper 22 in the disk axis direction at the pair of pin insertion portions 33. In other words, in the caliper 22, a pair of slide pins 45 provided on both sides in the disk rotation direction are slidably fitted into the corresponding pin insertion holes 43 of the mounting member 21 shown in FIG. 2, respectively. As a result, the caliper 22 shown in FIG. 1 is provided so as to be displaceable in the disc axis direction with respect to the mounting member 21.
[0018]
　One of the pair of outer side torque receiving portions 36 is on the side opposite to the inner side torque receiving portion 32 of the pin insertion portion 33 on one side in the disk rotation direction (that is, inside in the disk radial direction from the end on the outer side). ). The other of the pair of outer side torque receiving portions 36 extends inward in the disc radial direction from the outer end of the pin insertion portion 33 on the other side in the disc rotation direction. The pair of outer side torque receiving portions 36 are arranged on the outer side of the disc 11.
[0019]
　The outer beam portion 37 extends in the disc rotation direction and connects the inner ends of the pair of outer side torque receiving portions 36 in the disc radial direction. The outer beam portion 37 is arranged on the outer side of the disc 11 like the pair of outer side torque receiving portions 36.
[0020]
　With the configuration described above, the mounting member 21 is mounted on the non-rotating portion of the vehicle in a state of being arranged so as to straddle the outer peripheral side of the disc 11. The inner beam portion 31 and the pair of inner side torque receiving portions 32 are arranged on the inner side of the mounting member 21 which is the mounting side to the non-rotating portion of the vehicle. On the other hand, the pair of outer side torque receiving portions 36 and the outer beam portion 37 are arranged on the outer side of the mounting member 21 opposite to the inner side.
[0021]
　As shown in FIGS. 2 and 3, the pair of inner side torque receiving portions 32 and the pair of outer side torque receiving portions 36 are formed with pad guide portions 48 having the same concave shape as each other.
[0022]
　That is, as shown in FIG. 2, one inner side torque receiving portion 32 has an inner surface 46 on the outer side in the radial direction of the disc facing inward in the disk rotation direction and an inner surface 47 on the inner side in the radial direction of the disc toward the outer side in the disc rotation direction. A dented pad guide portion 48 is formed. The other inner side torque receiving portion 32 is also formed with a pad guide portion 48 having a shape recessed from the inner surface 46 on the outer side in the radial direction of the disc facing inward in the disk rotation direction and the inner surface 47 on the inner side in the radial direction of the disc toward the outer side in the disc rotation direction. Has been done. Therefore, on the side of the pair of inner side torque receiving portions 32 facing each other, a concave pad guide portion 48 recessed in a direction away from each other along the disk rotation direction is formed. The pad guide portion 48 penetrates the inner side torque receiving portion 32 of which the pad guide portion 48 is formed in the disk axis direction. One of the pair of friction pads 25 is supported by the pair of pad guide portions 48 provided on the pair of inner side torque receiving portions 32. Both the inner surface 46 and the inner surface 47 are along the disc axis direction and along the radial reference line.
[0023]
　Further, as shown in FIG. 3, one of the pair of outer side torque receiving portions 36 has an inner surface 46 on the outer side in the radial direction of the disc facing inward in the disk rotation direction and an inner surface 47 on the inner side in the radial direction of the disc toward the outer side in the disc rotation direction. A pad guide portion 48 having a concave shape is formed. On the other side of the pair of outer torque receiving portions 36, a pad guide portion 48 having a shape recessed from the inner surface 46 on the outer side in the radial direction of the disc and the inner surface 47 on the inner side in the radial direction of the disc facing inward in the disk rotation direction. Is formed. Therefore, concave pad guide portions 48 that are recessed in the direction away from each other along the disk rotation direction are formed in the portions of the pair of outer side torque receiving portions 36 that face each other. The pad guide portion 48 penetrates the outer side torque receiving portion 36 in which these are formed in the disk axis direction. The other of the pair of friction pads 25 is supported by the pair of pad guide portions 48 provided on the pair of outer side torque receiving portions 36.
[0024]
　Therefore, the mounting member 21 has four pad guide portions 48 having a shape recessed in the disk rotation direction. One of the four pad guide portions 48 having a common shape will be further described with reference to FIG. FIG. 4 shows the periphery of the inner side torque receiving portion 32 on the output side in the disk rotation direction.
[0025]
　The pad guide portion 48 has a concave portion 53 that is recessed in the disk rotation direction from the bottom surface 52 of the region outside the disk radial direction in the region inside the disc radial direction in the bottom portion 51 on the inner side in the concave direction. The bottom surface 52 is a flat surface facing inward in the disk rotation direction. The concave portion 53 is recessed toward the outside in the disk rotation direction from the bottom surface 52. The concave portion 53 also penetrates the inner side torque receiving portion 32 in which the concave portion 53 is formed in the disk axis direction.
[0026]
　The pad guide portion 48 includes a bottom surface 52, a wall surface 61 which is outside the disk radial direction and faces inward in the disk radial direction, a wall surface 62 which is inside the disk radial direction and faces outward in the disk radial direction, and a wall surface 61 in the disk radial direction. The side surface 63, which is between the wall surface 62 and faces inward in the radial direction of the disk, the inner bottom surface 64, which is outside the bottom surface 52 in the disk rotation direction and faces inward in the disk rotation direction, and the outside surface of the wall surface 62 in the disk rotation direction. It has a side surface 65 arranged on the same plane as the wall surface 62, and an inclined surface 66 connecting the bottom surface 52 and the side surface 63. The bottom surface 52, the wall surface 61, the wall surface 62, the side surface 63, the back bottom surface 64, the side surface 65, and the inclined surface 66 are all planar.
[0027]
　The wall surface 61 extends inward in the disk rotation direction from the edge portion on the outer side of the bottom surface 52 in the radial direction of the disk. The inclined surface 66 extends from the edge portion of the bottom surface 52 inside in the radial direction of the disk toward the outside in the rotation direction of the disk and the inside in the radial direction of the disk. The side surface 63 extends outward in the disk rotation direction from the end edge portion of the inclined surface 66 opposite to the bottom surface 52. The inner bottom surface 64 extends inward in the radial direction of the disc from the edge portion on the outer side in the rotation direction of the disc of the side surface 63. The side surface 65 extends inward in the disc rotation direction from the inner edge portion of the back bottom surface 64 in the radial direction of the disc, and is connected to the wall surface 62. The concave portion 53 has a side surface 63, a back bottom surface 64, a side surface 65, and an inclined surface 66.
[0028]
　Both the bottom surface 52 and the back bottom surface 64 are along the disc axis direction and along the radial reference line. The wall surface 61, the wall surface 62, the side surface 63, and the side surface 65 are all arranged in a plane orthogonal to the radial reference line. Therefore, the wall surface 61, the wall surface 62, the side surface 63, and the side surface 65 are parallel to each other, and the bottom surface 52 and the back bottom surface 64 are perpendicular to these. The wall surface 61, the wall surface 62, the side surface 63, the side surface 65, the bottom surface 52, the back bottom surface 64, and the inclined surface 66 are all along the disk axis direction. The concave portion 53 is recessed from the bottom surface 52 in the direction perpendicular to the bottom surface 52.
[0029]
　As shown in FIGS. 2 and 3, pad springs 26 are individually attached to the pair of inner side torque receiving portions 32 and the pair of outer side torque receiving portions 36 at the positions of the pad guide portions 48, respectively. .. That is, four pad springs 26 are attached to one attachment member 21. Here, the pad spring 26 arranged on the input side in the disc rotation direction on the inner side and the pad spring 26 arranged on the exit side in the disc rotation direction on the outer side are common parts having the same shape. The pad spring 26 arranged on the inner side and the output side in the disc rotation direction and the pad spring 26 arranged on the outer side and the input side in the disc rotation direction are common parts having the same shape. The pad spring 26 on the inner side and the disc rotation direction entry side and the outer side and the disc rotation direction exit side and the pad spring 26 on the inner side and the disc rotation direction exit side and the outer side and the disc rotation direction entry side are mirror-symmetrical to each other. It has the shape of.
[0030]
　The pad spring 26 is formed by press molding from a single plate material. One of the pad springs 26 having a mirror-symmetrical shape with each other will be taken as an example, and will be described with reference to FIGS. 5 and 6. The pad springs 26 shown in FIGS. 5 and 6 are arranged on the inner side and the disc rotation direction exit side and the outer side and the disc rotation direction entry side.
[0031]
　As shown in FIG. 5, the pad spring 26 has a concave guide portion 82 and a fitting portion 101 protruding from the guide portion 82 to the outside of the guide portion 82. The guide portion 82 has a substrate portion 83 (bottom contact portion), a plate portion 84, and a plate portion 85, both of which are flat plates. The substrate portion 83 has a rectangular shape, and the plate portion 84 has a rectangular shape extending perpendicularly to the substrate portion 83 from one end edge portion of the substrate portion 83. One end edge of the fitting portion 101 is connected to the other end edge of the board portion 83 parallel to this one end edge. The plate portion 85 extends from the other end edge portion of the fitting portion 101 parallel to the one end edge portion so as to be parallel to the plate portion 84. The plate portion 85 has a rectangular shape and is arranged on the same side as the plate portion 84 with respect to the substrate portion 83 in the plate thickness direction of the substrate portion 83.
[0032]
　The pad spring 26 has an extension portion 91, an engagement plate portion 92, a projecting plate portion 93, a projecting plate portion 94, a spring plate portion 95, and a spring plate portion 96. The extending portion 91 has an S shape. The extension portion 91 is a substantially extension of the substrate portion 83 from a position near the fitting portion 101 at one end edge portion of the end edge portion orthogonal to the one end edge portion provided with the plate portion 84 of the substrate portion 83. After extending in the direction, the substrate portion 83 is folded back on the side opposite to the plate portions 84 and 85 in the plate thickness direction, and further folded back on the side opposite to the plate portions 84 and 85 in the plate thickness direction of the substrate portion 83. It is S-shaped. The engaging plate portion 92 has a plate thickness of the substrate portion 83 from a position near the fitting portion 101 on the other end edge portion of the end edge portions orthogonal to the one end edge portion provided with the plate portion 84 of the substrate portion 83. In the direction, it protrudes in the direction opposite to the plate portions 84 and 85. The projecting plate portion 93 extends from the edge portion of the plate portion 84 continuous with the end edge portion provided with the extending portion 91 of the substrate portion 83 along the same plane as the plate portion 84, and then the plate portion 85. It protrudes in the opposite direction and diagonally.
[0033]
　The protruding plate portion 94 is parallel to the substrate portion 83 and protrudes in the direction opposite to the plate portion 85 from the edge portion of the plate portion 84 opposite to the substrate portion 83. The spring plate portion 95 is folded back from the end edge portion of the projecting plate portion 94 continuous with the end edge portion provided with the projecting plate portion 93 of the plate portion 84 to the side opposite to the plate portion 84. The spring plate portion 96 extends along the same plane as the plate portion 85 from the end edge portion of the plate portion 85 continuous with the end edge portion provided with the extension portion 91 of the substrate portion 83, and then extends to the plate portion 84 side. It is folded back to. The spring plate portion 96 constitutes a concave guide portion 82 together with the substrate portion 83, the plate portion 84, and the plate portion 85.
[0034]
　The spring plate portion 95 and the spring plate portion 96 shown in FIGS. 5 and 6 show a deformed state when the pad spring 26 is attached to the attachment member 21 to support the friction pad 25. In the natural state, the spring plate portion 95 opens with respect to the protruding plate portion 94 so as to form an acute angle larger than shown in the drawing centering on the folding point side. In the natural state, the spring plate portion 96 opens with respect to the plate portion 85 so as to form an acute angle centered on the folding point side.
[0035]
　The fitting portion 101 has a shape that protrudes from the plate portion 85 side of the guide portion 82 along the plate portion 85 to the side opposite to the plate portion 85 from the substrate portion 83. The fitting portion 101 is a flat plate-shaped extending plate portion extending from the edge portion of the substrate portion 83 on the plate portion 85 side to the side opposite to the side where the plate portions 84 and 85 are located in the plate thickness direction of the substrate portion 83. A flat plate-shaped extension plate that is flush with the plate portion 85 and extends from the position of the substrate portion 83 toward the side opposite to the side where the plate portions 84 and 85 are located in the plate thickness direction of the substrate portion 83. It has a portion 103, and a flat plate-shaped connecting plate portion 104 that connects both end portions of the extension plate portion 102 and both end edges of the extension plate portion 103 in the extension direction. The extension plate portion 102 and the extension plate portion 103 are parallel to each other, and these are perpendicular to the substrate portion 83. The extending plate portion 102 is parallel to the plate portion 84 and the plate portion 85. The extending plate portion 103 is parallel to the plate portion 84 and is arranged on the same plane as the plate portion 85. The connecting plate portion 104 is perpendicular to both the extension plate portion 102 and the extension plate portion 103.
[0036]
　In other words, the fitting portion 101 is in a state of being perpendicular to the substrate portion 83 from the edge portion of the substrate portion 83 on the plate portion 85 side and parallel to the plate portion 84 and the plate portion 85. A curl that extends along the plate thickness direction of 83 to the side opposite to the side where the plate portions 84 and 85 are located, and then is folded back toward the side where the plate portion 85 is located and connected to the plate portion 85 so as to form a parallel plane. The shape. The distance between the outer surfaces of the extension plate portion 102 and the extension plate portion 103 that are opposite to each other along the radial direction of the disk is larger than the distance between the side surfaces 63 and the side surfaces 65 of the concave portion 53 shown in FIG. However, it is increased by the predetermined tightening allowance.
[0037]
　The guide portion 82 of each pad spring 26 is fitted to the concave pad guide portion 48 in each of the pair of inner side torque receiving portions 32 shown in FIG. 2 and the pair of outer side torque receiving portions 36 shown in FIG. .. At that time, the four pad springs 26 correspond to each fitting portion 101 while elastically deforming in the radial direction of the disc, like the pad springs 26 on the inner side and the output side in the disc rotation direction exemplified in FIG. It is fitted to the concave portion 53 to be formed. Therefore, in the guide portion 82 of each pad spring 26, the plate portion 84 contacts the wall surface 61 in surface contact with the corresponding pad guide portion 48, and the substrate portion 83 contacts the bottom surface 52 in surface contact. 85 comes into contact with the wall surface 62 by surface contact. Further, in the fitting portion 101 of each pad spring 26, the extension plate portion 102 contacts the side surface 63 in surface contact, and the extension plate portion 103 contacts the side surface 65 in surface contact. In other words, in each pad spring 26, each guide portion 82 elastically fits into the corresponding pad guide portion 48, and at that time, each fitting portion 101 elastically fits into the corresponding concave portion 53. Fits into. In this state, the fitting portion 101 is separated from the inner bottom surface 64 of the concave portion 53.
[0038]
　Therefore, the guide portion 82 of the pad spring 26 is provided so as to be able to come into contact with the wall surface 61 on the outer side in the disk radial direction of the pad guide portion 48 having the corresponding concave shape and the bottom surface 52 on the inner side in the concave direction. Further, the fitting portion 101 of the pad spring 26 projects from the inner end portion of the guide portion 82 in the disc radial direction in the disc rotation direction with respect to the concave portion 53 at the inner end portion of the pad guide portion 48 in the disc radial direction. It fits elastically. The fitting portion 101 is elastically deformed in the radial direction of the disk and fitted in the concave portion 53, whereby the fitting portion 101 is formed on the outer side surface 63 in the radial direction of the disk and the inner side surface 65 in the radial direction of the disk of the concave portion 53. An elastic force is applied to it.
[0039]
　Further, when the guide portion 82 of each pad spring 26 is fitted to the concave pad guide portion 48 in each of the pair of inner side torque receiving portions 32 and the pair of outer side torque receiving portions 36, the inner side torque is applied. In the pad spring 26 attached to the receiving portion 32, the inner side torque receiving portion 32 is sandwiched along the disk axis direction by the extending portion 91 and the engaging plate portion 92. Further, in the pad spring 26 attached to the outer side torque receiving portion 36, the outer side torque receiving portion 36 is sandwiched along the disk axis direction by the extending portion 91 and the engaging plate portion 92.
[0040]
　At that time, as shown in FIG. 2, the two pad springs 26 attached to the pair of inner side torque receiving portions 32 both have the extending portion 91 opposite to the inner side, that is, the disc 11 in the disc axial direction. It can be installed in a state where it is placed on the side. As shown in FIG. 3, in each of the two pad springs 26 attached to the pair of outer side torque receiving portions 36, the extending portion 91 is arranged on the outer side in the disc axis direction, that is, on the side opposite to the disc 11. It can be installed in the state.
[0041]
　As shown in FIG. 4, in the pad spring 26 attached to the pad guide portion 48, the fitting portion 101 thereof is orthogonal to the radial reference line from the inner end portion of the guide portion 82 in the radial direction of the disk. Further, the pad guide portion 48 is elastically fitted in the concave portion 53 which protrudes outward in the disk rotation direction and is similarly recessed at the inner end portion in the disc radial direction of the pad guide portion 48. The fitting portion 101 has an extension plate portion 102 extending from the inner edge portion of the substrate portion 83 in the radial direction of the disc perpendicular to the radial reference line and outward in the rotation direction of the disc. Further, the extending plate portion 103 extends in the same plane as the plate portion 85 from the edge portion on the outer side in the disk rotation direction of the plate portion 85 so as to be orthogonal to the radial reference line and toward the outer side in the disk rotation direction. ing. Further, the connecting plate portion 104 of the fitting portion 101 connects both end edges of the extension plate portion 102 and the extension plate portion 103 outside in the disk rotation direction in a direction orthogonal to these.
[0042]
　In other words, the fitting portion 101 extends in the radial direction of the disc from the inner edge portion of the substrate portion 83 of the guide portion 82 in the radial direction of the disc, orthogonal to the radial reference line and outward in the radial direction of the disc. It has a curl shape that is folded inward and connected to the plate portion 85 in the same plane. The fitting portion 101 is perpendicular to the substrate portion 83 that can abut on the bottom surface 52 of the guide portion 82 and projects outward in the disk rotation direction. The fitting portion 101 is provided at the inner end portion of the guide portion 82 in the radial direction of the disk.
[0043]
　The pair of friction pads 25 shown in FIGS. 2 and 3 are common parts. The friction pad 25 has a metal back plate 121 and a lining (not shown) which is a friction material. The lining is attached to one side of the back plate 121 in the plate thickness direction. A shim 128 is provided on the pressing surface 126 on the side opposite to the lining in the plate thickness direction of the back plate 121 so as to cover the pressing surface 126. The shim 128 is engaged with the back plate 121.
[0044]
　The pair of friction pads 25 are supported by the mounting member 21 on the back plate 121 via the pad spring 26. Each of the pair of friction pads 25 faces the disc 11 in the lining. Therefore, the lining of the friction pad 25 comes into contact with the disc 11. The pressing surface 126 of the back plate 121 faces the side opposite to the side where the disc 11 is located in the disc axis direction.
[0045]
　The back plate 121 has a mirror-symmetrical shape, and the main plate portion 131 to which the lining is attached and protrusions protruding outward along the longitudinal direction of the main plate portion 131 from both ends in the longitudinal direction of the main plate portion 131. It has a unit 132. The pair of projecting portions 132 have a substantially rectangular shape, and as shown in FIG. 4, have a tip surface portion 141, a surface portion 142, a surface portion 143, a chamfered 144, and a chamfered 145. The tip surface portion 141, the surface portion 142, the surface portion 143, the chamfer 144, and the chamfer 145 are all planar and extend in the thickness direction of the back plate 121. The face portion 142 and the face portion 143 are parallel to each other and perpendicular to the tip surface portion 141. The chamfer 144 connects the tip surface portion 141 and the surface portion 142 in an inclined manner so as to form an equivalent angle with respect to the front end surface portion 141. The chamfer 145 connects the tip surface portion 141 and the surface portion 143 at an angle so as to form an equivalent angle with respect to the front end surface portion 141 and the surface portion 143.
[0046]
　As shown in FIG. 2, in the friction pad 25 on the inner side, the pair of protruding portions 132 are inserted into the guide portions 82 of the pair of pad springs 26 attached to the pair of inner side torque receiving portions 32. Become. At that time, the back plate 121 elastically deforms the pair of spring plate portions 95 and the pair of spring plate portions 96 provided on both sides in the disk rotation direction. The friction pad 25 on the inner side attached to the mounting member 21 via the pair of pad springs 26 in this way can move in the disc axial direction with respect to the mounting member 21 in a state of being located on one surface side of the disc 11. Will be. Each pad spring 26 is attached to the mounting member 21 and elastically supports the corresponding friction pad 25.
[0047]
　In the concave pad guide portion 48 of the pair of inner side torque receiving portions 32, the pair of protruding portions 132 of the friction pad 25 on the inner side are arranged in a nested state via the guide portions 82 of the pair of pad springs 26. .. Therefore, the pad guide portion 48 of the pair of inner side torque receiving portions 32 limits the movement of the pair of protruding portions 132 provided in the inner side friction pad 25 in the disc radial direction. Further, the pad guide portion 48 of the inner side torque receiving portion 32 receives the braking torque in the disc rotation direction from the protruding portion 132 of the inner side friction pad 25 via the guide portion 82.
[0048]
　In other words, the inner side friction pad 25 has one protruding portion 132 of the back plate 121 in the pad guide portion 48 of the one inner side torque receiving portion 32 via the guide portion 82 of the corresponding pad spring 26. Have been placed. Further, the other protruding portion 132 of the back plate 121 is arranged in the pad guide portion 48 of the other inner side torque receiving portion 32 via the guide portion 82 of the corresponding pad spring 26. As a result, the friction pad 25 on the inner side is movably supported by the mounting member 21 in the disk axis direction.
[0049]
　In addition, the friction pads 25 on the inner side are pressed toward the outside in the radial direction of the disc by the spring plate portions 96 of the pad springs 26 with which the protrusions 132 on both sides of the back plate 121 are in contact with each other. As a result, in the friction pad 25 on the inner side, as shown in FIG. 4, the surface portions 142 of the protrusions 132 on both sides come into contact with the plate portion 84 of the guide portion 82 of the pad spring 26 in surface contact. Here, in the friction pad 25 on the inner side, basically, the tip surface portions 141 of the protrusions 132 on both sides are in surface contact with the substrate portion 83 of the guide portion 82 of the pad spring 26 to be fitted, respectively. Contact with. In addition, the friction pad 25 on the inner side is urged toward the center side in the disc rotation direction by the spring plate portion 95 of the pair of pad springs 26 with which the main plate portion 131 of the back plate 121 abuts.
[0050]
　Therefore, the guide portions 82 of the pad springs 26 arranged on both sides in the disc rotation direction on the inner side can come into contact with the wall surface 61 and the bottom surface 52 on the outer side in the disc radial direction in the pad guide portion 48 of the mating destination. It is provided and guides the movement of the corresponding protrusion 132 of the friction pad 25 on the inner side along the disk axis direction. In the friction pad 25 on the inner side, the protruding portion 132 is in contact with the plate portion 84 of the guide portion 82 of the pad spring 26 by surface contact with the surface portions 142 of the protruding portions 132 on both sides thereof. It is separated from the disk in the radial direction and the disk rotation direction and does not come into contact with the fitting portion 101 at all.
[0051]
　In the friction pad 25 on the outer side, as shown in FIG. 3, the pair of protruding portions 132 are inserted into the guide portions 82 of the pair of pad springs 26 attached to the pair of torque receiving portions 36 on the outer side. Become. At that time, the back plate 121 elastically deforms the pair of spring plate portions 95 and the pair of spring plate portions 96 provided on both sides in the disk rotation direction. The friction pad 25 on the outer side attached to the mounting member 21 via the pair of pad springs 26 in this way moves in the disc axial direction with respect to the mounting member 21 in a state of being located on the other surface side of the disc 11. It will be possible. Each pad spring 26 is attached to the mounting member 21 and elastically supports the corresponding friction pad 25.
[0052]
　In the concave pad guide portion 48 of the pair of outer side torque receiving portions 36, the pair of protruding portions 132 of the friction pad 25 on the outer side are arranged in a nested state via the guide portions 82 of the pair of pad springs 26. .. Therefore, the pad guide portion 48 of the outer side torque receiving portion 36 limits the movement of the pair of protruding portions 132 provided in the friction pad 25 on the outer side in the disc radial direction. Further, the pad guide portion 48 of the outer side torque receiving portion 36 receives the braking torque in the disc rotation direction from the protruding portion 132 of the friction pad 25 on the outer side via the guide portion 82.
[0053]
　In other words, in the friction pad 25 on the outer side, one of the protruding portions 132 of the back plate 121 is inside the pad guide portion 48 of the torque receiving portion 36 on the one outer side via the guide portion 82 of the corresponding pad spring 26. Is located in. Further, the other protruding portion 132 of the back plate 121 is arranged in the pad guide portion 48 of the other outer side torque receiving portion 36 via the guide portion 82 of the corresponding pad spring 26. As a result, the friction pad 25 on the outer side is movably supported by the mounting member 21 in the disc axis direction.
[0054]
　In addition, the friction pad 25 on the outer side is the same as the pair of pad guide portions 48 on the inner side via the pair of pad springs 26 on the outer side, which is the same as the pair of pad springs 26 on the inner side. It is supported by the pair of pad guide portions 48 in the same manner as the friction pad 25 on the inner side.
[0055]
　As described above, as shown in FIG. 2, the mounting member 21 has the inner side torque receiving portion 32 on the disc rotation direction entry side and the disc rotation direction exit side so as to receive the braking torque of the friction pad 25 on the inner side. It is formed in each of. Further, as shown in FIG. 3, the mounting member 21 has a disc rotation direction entry side and a disc rotation direction exit side so that the outer side torque receiving portion 36 receives the braking torque of the friction pad 25 on the outer side. It is formed in each.
[0056]
　The back plate 121 has a pair of spring mounting protrusions 152 and a pair of sensor mounting protrusions 153 on the pressing surface 126 side. All of these project from the pressing surface 126 along the thickness direction of the back plate 121. The pair of spring mounting protrusions 152 are provided on the protrusions 132 on both sides. The pair of sensor mounting protrusions 153 are provided on the main plate 131 so as to be separated from each other in the disk rotation direction.
[0057]
　As shown in FIG. 2, the friction pad 25 on the inner side abuts on the corresponding one of the pair of inner torque receiving portions 32 and urges the friction pad 25 on the inner side in a direction away from the disc 11. Spring members 161 are attached to both sides of the disc rotation direction. One spring material 161 is attached to the spring mounting protrusion 152 on the disc rotation direction entry side of the friction pad 25 on the inner side by crimping the spring mounting protrusion 152. The other spring material 161 is attached to the spring mounting protrusion 152 on the disc rotation direction exit side of the friction pad 25 on the inner side by crimping the spring mounting protrusion 152. Further, on the friction pad 25 on the inner side, a wear sensor 162 that contacts the disk 11 to generate a warning sound when the thickness of the lining becomes thinner than a predetermined thickness is provided on the sensor mounting protrusion 153 on the input side in the disk rotation direction. The sensor mounting protrusion 153 is attached by crimping.
[0058]
　As shown in FIG. 3, the friction pad 25 on the outer side also abuts on the corresponding one of the pair of outer torque receiving portions 36 and urges the friction pad 25 on the outer side in a direction away from the disc 11. Spring members 161 are attached to both sides of the disc rotation direction. One spring material 161 is attached to the spring mounting protrusion 152 on the disc rotation direction entry side of the friction pad 25 on the outer side by crimping the spring mounting protrusion 152. The other spring material 161 is attached to the spring mounting protrusion 152 on the disc rotation direction exit side of the friction pad 25 on the outer side by crimping the spring mounting protrusion 152.
[0059]
　As shown in FIG. 1, the caliper 22 has a shape substantially mirror-symmetrical. The caliper 22 includes a caliper body 171 and a piston 172 shown by a two-dot chain line in FIG.
[0060]
　The caliper body 171 is integrally molded by casting, and straddles the cylinder portion 181 arranged on the inner side in the disc axis direction with respect to the disc 11 and the outer periphery of the disc 11 from the outside in the disc radial direction of the cylinder portion 181. The bridge portion 182 extending toward the outer side along the disc axis direction and the bridge portion 182 extending inward in the disc radial direction from the side opposite to the cylinder portion 181 of the bridge portion 182 are arranged on the outer side of the disc 11 in the disc axis direction. It has a pressing claw 183 and a pair of pin mounting portions 184 extending from the cylinder portion 181 to both sides in the disk rotation direction.
[0061]
　The caliper body 171 has a slide pin 45 attached to a pin attachment portion 184 on one side in the disk rotation direction. Further, the slide pin 45 is also attached to the pin attachment portion 184 on the other side in the disk rotation direction. A pair of slide pins 45 on both sides of the caliper 22 shown in FIG. 1 in the disk rotation direction are slidably fitted into the pair of pin insertion holes 43 shown in FIG. Each pair of boots 23 covers a portion of the corresponding slide pin 45 that projects from the mounting member 21.
[0062]
　The piston 172 shown by the chain double-dashed line in FIG. 2 is housed in the cylinder portion 181 so as to be movable in the disk axis direction. The pair of pistons 172 have the same shape as each other, and are provided side by side in the disk rotation direction with their positions aligned in the disc radial direction.
[0063]
　In the disc brake 10, the brake fluid is introduced into the cylinder portion 181 of the caliper 22 via a brake pipe (not shown). Then, the brake fluid pressure acts on the pair of pistons 172 in the cylinder portion 181. As a result, the pair of pistons 172 move forward toward the disc 11 and press the friction pad 25 on the inner side arranged between the pistons 172 and the disc 11 toward the disc 11. Then, in the friction pad 25 on the inner side, the pair of protrusions 132 are guided by the pair of inner side pad guide portions 48 via the guide portions 82 of the pair of inner side pad springs 26 and move in the disk axis direction. Then, it comes into contact with the disc 11 in the lining (not shown). Then, the friction pad 25 on the inner side tries to move to the output side in the disk rotation direction together with the disk 11, and the protrusion 132 on the output side in the disk rotation direction guides the pad spring 26 on the inner side and the output side in the disk rotation direction. It hits the bottom portion 51 of the pad guide portion 48 on the inner side and on the output side in the disk rotation direction via the substrate portion 83 of the portion 82. As a result, the braking torque of the friction pad 25 on the inner side is transferred from the protruding portion 132 on the disc rotation direction exit side to the inner side and the disc rotation direction exit side via the substrate portion 83 on the inner side and the disc rotation direction exit side. It is transmitted to a certain bottom 51.
[0064]
　Further, the reaction force of this pressing causes the caliper body 171 to slide the slide pin 45 with respect to the mounting member 21 and move in the direction of the disk axis. As a result, the pressing claw 183 presses the friction pad 25 on the outer side arranged between the pressing claw 183 and the disc 11 toward the disc 11. Then, in the friction pad 25 on the outer side, the pair of protrusions 132 are guided by the pair of outer pad guide portions 48 via the guide portions 82 of the pair of outer side pad springs 26 and move in the disk axis direction. Then, it comes into contact with the disc 11 in the lining. Then, the friction pad 25 on the outer side tends to move to the output side in the disc rotation direction together with the disc 11. As a result, the protruding portion 132 on the disk rotation direction exit side passes through the board portion 83 of the guide portion 82 of the pad spring 26 on the outer side and the disc rotation direction exit side, and the pad guide on the outer side and the disc rotation direction exit side. It corresponds to the bottom portion 51 of the portion 48. As a result, the braking torque of the friction pad 25 on the outer side is applied from the protruding portion 132 on the disc rotation direction exit side to the outer side and the disc rotation direction exit side via the substrate portion 83 on the outer side and the disc rotation direction exit side. It is transmitted to the bottom 51.
[0065]
　The caliper 22 slidably provided on the mounting member 21 thus holds the pair of friction pads 25 between the pistons 172 and the pressing claws 183 from both sides in the disc axis direction by the operation of the plurality of pistons 172. Then, these friction pads 25 are pressed against both sides of the disc 11. As a result, the caliper 22 imparts frictional resistance to the disc 11 to generate braking force. The caliper 22 is a so-called fist type (slide type) caliper.
[0066]
　The above-mentioned Patent Documents 1 and 2 describe a disc brake having a structure in which a protruding portion of a friction pad is inserted into a concave pad guide portion of a mounting member to support the friction pad, and the friction pad is urged by a pad spring. Has been done. In the disc brake described in Patent Document 2, a curl portion is provided at a position outside the disc axis direction with respect to the pad spring mounting member.
[0067]
　As described above, in the disc brake, it is desired to suppress the slight pressure squeal which is a brake squeal generated at the time of fine pressure braking. Since the pressing force by the piston 172 is small during the slight pressure braking, the frictional force generated between the disc 11 and the friction pad 25 is also small. Therefore, the force with which the friction pad 25 abuts on the pad spring 26 in the disk rotation direction becomes small. Here, in the pad spring 26, basically, the substrate portion 83 of the guide portion 82 is sandwiched between the protruding portion 132 of the friction pad 25 and the bottom portion 51 of the pad guide portion 48. However, if there is a minute gap due to variations in the assembly of the pad spring 26 between the substrate portion 83 and the protruding portion 132 or between the substrate portion 83 and the bottom portion 51, the structure does not have the fitting portion 101. In the pad spring, bending occurs, and the friction pad 25 is supported by a relatively weak spring. Therefore, the friction pad 25 tends to vibrate due to the frictional vibration, which may lead to a slight pressure squeal.
[0068]
　That is, on the outer side of the pad spring 26 in the disc radial direction, there is a spring plate portion 95 that urges the friction pad 25 in the disc rotation direction, and the friction pad 25 is formed by the spring plate portions 95 of the pad springs 26 on both sides in the disc rotation direction. It stays in a neutral position. At the time of braking, the frictional force with the disc 11 tries to displace the friction pad 25 on the outward side in the disc rotation direction, but the spring plate portion 95 generates a reaction force according to the displacement so as to resist this. Since the frictional force is small during the slight pressure braking, the acting force of the pad spring 26 on the pad guide portion 48 from the friction pad 25 is small. The pad spring 26 is attached to the mounting member 21 with the mounting member 21 sandwiched between the extending portion 91 and the engaging plate portion 92 that are relatively inward in the radial direction of the disc. Therefore, the mounting position and the position of the force point acting on the spring plate portion 95 are deviated in the radial direction of the disk. Therefore, a moment centered on the line along the disc axis acts on the pad spring 26. As a result, the pad spring 26 tends to lift the inner portion of the guide portion 82 in the radial direction of the disc to the inner side in the rotational direction of the disc during the slight pressure braking.
[0069]
　If the pad spring 26 does not have the fitting portion 101 due to the small acting force from the friction pad 25 and the lifting due to the above-mentioned moment, the friction pad 25 is attached via the pad spring 26 to the mounting member 21 during micropressure braking. Cannot contact rigidly. As a result, as a vibration system, the friction pad 25 is in a state of being supported by a relatively weak spring, and there is a possibility that a slight pressure squeal may occur.
[0070]
　On the other hand, in the disc brake 10 of the first embodiment, the pad guide portion 48 having a shape recessed in the disc rotation direction of the mounting member 21 is located in a region inside the bottom portion 51 of the pad guide portion 48 in the disc radial direction. It has a concave portion 53 that is recessed in the disc rotation direction from the bottom surface 52 of the region outside the direction. Then, the pad spring 26 is provided so as to be in contact with the wall surface 61 and the bottom surface 52 on the outer side in the radial direction of the disc of the pad guide portion 48, and is provided from the guide portion 82 for guiding the movement of the protruding portion 132 of the friction pad 25 in the disk axial direction. It has a fitting portion 101 that protrudes in the disk rotation direction and elastically fits into the concave portion 53.
　Since the fitting portion 101 elastically fits in the concave portion 53 in this way, the movement of the fitting portion 101 in the pull-out direction from the concave portion 53 is restricted by the frictional force. Therefore, it is possible to prevent the inner portion of the guide portion 82 of the pad spring 26 in the radial direction of the disc from rising toward the inner side in the rotational direction of the disc. Therefore, it is possible to suppress the slight pressure squeal caused by the lifting of the guide portion 82 of the pad spring 26. That is, the protrusion 132 of the friction pad 25, the guide portion 82 of the pad spring 26, and the pad guide portion 48 of the mounting member 21 are in close contact with each other to increase the contact rigidity, and as a result, the support of the friction pad 25 is made rigid. It is possible to suppress slight pressure squeal due to the vibration of the pad 25.
[0071]
　Further, the fitting portion 101 has a curl shape that extends in the disc rotation direction from the substrate portion 83 of the guide portion 82 and then is folded back inward in the disc radial direction. Then, the fitting portion 101 is elastically deformed in the radial direction of the disk and fitted to the concave portion 53 to apply an elastic force to the outer side surface 63 in the radial direction of the disk and the inner side surface 65 in the radial direction of the disk of the concave portion 53. Give. Therefore, with a simple structure, it is possible to suppress slight pressure squeal caused by the lifting of the guide portion 82 of the pad spring 26.
[0072]
　Further, since the fitting portion 101 has a curl shape that extends from the guide portion 82 in the disc rotation direction and then is folded back inward in the disc radial direction, wear debris generated by braking can be released. Therefore, it is possible to suppress the deterioration of the sliding performance of the friction pad 25, and it is possible to suppress the dragging and brake squeal of the friction pad 25 due to this. That is, the properties of the substrate portion 83 of the guide portion 82 affect the sliding performance of the friction pad 25 in the disk axis direction. In the friction pad 25 that has been repeatedly braked, wear debris tends to adhere to the substrate portion 83 of the guide portion 82 on the exit side in the disk rotation direction. If the wear debris adheres to the substrate portion 83, the sliding performance is deteriorated. On the other hand, since the curl-shaped fitting portion 101 is provided, the wear debris can be released into the fitting portion 101, so that the adhesion of the wear debris to the substrate portion 83 can be suppressed. Therefore, it is possible to suppress a decrease in the sliding performance of the friction pad 25.
[0073]
　Further, since the curl-shaped fitting portion 101 is provided at the inner end portion of the guide portion 82 in the radial direction of the disk, it is possible to suppress the contact between the fitting portion 101 and the friction pad 25. Therefore, the slight pressure squeal can be further suppressed. That is, since the fitting portion 101 has a curl shape, when the friction pad 25 comes into contact with the fitting portion 101, the friction pad 25 and the pad spring 26 are affected by a slight change in curvature of the curl shape of the fitting portion 101. However, it does not become a surface contact, but becomes a local hit, and the contact rigidity decreases, which causes a slight pressure squeal. On the other hand, since the contact between the curled fitting portion 101 and the friction pad 25 can be suppressed, it is possible to suppress the local contact between the friction pad 25 and the pad spring 26.
[0074]
　Further, since the curl-shaped fitting portion 101 is provided at the end portion of the guide portion 82 inside in the radial direction of the disk, the above-mentioned wear debris can be efficiently discharged. That is, during the rotation of the disc 11, the peripheral speed of the disc 11 is high, and the peripheral speed of the disc 11 is slow. Therefore, in the guide portion 82, the wear debris tends to collect inside in the radial direction of the disk. Since the curl-shaped fitting portion 101 is provided at the end portion of the guide portion 82 inside in the radial direction of the disk, the above-mentioned wear debris can be efficiently discharged. Of the lining components of the friction pad 25, when a relatively hard and large elastic component is peeled off, if it is caught in between, the contact rigidity between the guide portion 82 and the friction pad 25 is lowered, which leads to brake squeal. there is a possibility. By discharging the elastic component from the curled fitting portion 101, it is possible to suppress a decrease in contact rigidity.
[0075]
　Further, the concave portion 53 of the pad guide portion 48 is recessed perpendicularly to the bottom surface 52 of the pad guide portion 48, and the fitting portion 101 of the pad spring 26 with respect to the substrate portion 83 capable of contacting the bottom surface 52. Protrudes vertically. Therefore, it becomes easy to form the concave portion 53 in the mounting member 21 and to form the fitting portion 101 in the pad spring 26.
[0076]
[Second Embodiment]
　Next, the second embodiment of the present invention will be described mainly with reference to FIG. 7. In the following description, the differences from the first embodiment will be mainly described. The parts common to the first embodiment are represented by the same name and the same reference numerals.
[0077]
　The disc brake 10A of the second embodiment has a mounting member 21A that is partially different from the mounting member 21 of the first embodiment. FIG. 7 shows an inner side torque receiving portion 32A on the output side in the disk rotation direction. The inner side torque receiving portion 32A is partially different from the inner side torque receiving portion 32 of the first embodiment. The inner side torque receiving unit 32A has a pad guide unit 48A that is partially modified from the pad guide unit 48 of the first embodiment. The mounting member 21A of the second embodiment has an inner torque receiving portion 32 (see FIG. 2) on the input side in the disk rotation direction and an exit side in the disk rotation direction with respect to the mounting member 21 of the first embodiment. Regarding the outer side torque receiving portion 36 (see FIG. 3) and the outer side torque receiving portion 36 (see FIG. 3) on the disk rotation direction input side, the pad guide portion 48 is changed in the same manner as the inner side torque receiving portion 32. It has become.
[0078]
　The pad guide portion 48A has a concave portion 53A that is recessed in the disk rotation direction from the bottom surface 52 of the region outside the disk radial direction in the region inside the disc radial direction in the bottom portion 51A on the inner side in the concave direction. The concave portion 53A is recessed outside the disk rotation direction with respect to the bottom surface 52. The concave portion 53A also penetrates the inner side torque receiving portion 32A of which the concave portion 53A is formed in the direction of the disk axis.
[0079]
　The pad guide portion 48A has a flat side surface 63A between the wall surface 61 and the wall surface 62 in the disc radial direction and facing inward in the disc radial direction, and a flat side surface 63A facing inward in the disc rotation direction outside the bottom surface 52 in the disc rotation direction. It has a back bottom surface 64A and a flat side surface 65A that is on the outer side of the wall surface 62 in the disk rotation direction and extends inclined from the wall surface 62.
[0080] [0080]
　The side surface 63A extends from the inner edge of the bottom surface 52 in the radial direction to the outside in the rotation direction of the disk at an obtuse angle of 135 ° with respect to the bottom surface 52. The inner bottom surface 64A extends inward in the radial direction of the disk so as to be perpendicular to the side surface 63A from the edge portion on the outer side in the disk rotation direction of the side surface 63A. The side surface 65A extends inward in the disk rotation direction perpendicular to the back bottom 64A from the inner edge of the back bottom 64A in the radial direction of the disk, and is connected to the wall surface 62 at an obtuse angle of 135 °. There is. The concave portion 53A has a side surface 63A, a back bottom surface 64A, and a side surface 65A.
[0081]
　The side surface 63A, the back bottom surface 64A, and the side surface 65A are inclined along the disc axis direction and with respect to the radial reference line. The side surface 63A and the side surface 65A are inclined so as to be located outside the disk rotation direction toward the center side of the disk 11 in the extending direction with respect to the radial reference line. The inner bottom surface 64A is inclined so as to be located inside the disk rotation direction toward the center side of the disk 11 in the extending direction with respect to the radial reference line. The side surface 63A and the side surface 65A are parallel to each other, and the back bottom surface 64A is perpendicular to them. The concave portion 53A is inclined and recessed with respect to the bottom surface 52. The concave portion 53A is inclined and recessed with respect to the bottom surface 52 so as to be located on the center side of the disk 11 in the extending direction of the radial reference line toward the outside in the disk rotation direction and the outside in the disk rotation direction.
[0082]
　The disc brake 10A of the second embodiment is provided with a pad spring 26A that is partially modified from the pad spring 26 of the first embodiment on the inner side and the disc rotation direction exit side. The disc brake 10A of the second embodiment includes a pad spring 26 on the inner side and the disc rotation direction entry side of the first embodiment, a pad spring 26 on the outer side and the disc rotation direction exit side, and an outer side and the disc rotation. The pad spring 26 on the direction entry side is also changed in the same manner as the pad spring 26 on the inner side and the disc rotation direction exit side.
[0083]
　The pad spring 26A is formed by press molding from a single plate material, and has a fitting portion 101A different from that of the first embodiment. The fitting portion 101A is inclined with respect to the substrate portion 83 and the plate portion 85 from the proximity side of the substrate portion 83 and the plate portion 85 of the guide portion 82 and protrudes to the outside of the guide portion 82.
[0084]
　The fitting portion 101A is inclined at an angle of 135 ° with respect to the substrate portion 83 from the edge portion of the substrate portion 83 on the plate portion 85 side to the side opposite to the plate portions 84 and 85 in the plate thickness direction of the substrate portion 83. The plate-shaped extending plate portion 102A that extends and the plate portion 84 inclined at an angle of 135 ° with respect to the plate portion 85 from the edge portion of the plate portion 85 on the substrate portion 83 side in the plate thickness direction of the substrate portion 83. , 85 A flat plate-like extending plate portion 103A extending to the opposite side to each other, and both end edges on the opposite sides of the extending plate portion 102A and the guide portion 82 of the extending plate portion 103A. It has a connecting plate portion 104A of.
[0085]
　In other words, the fitting portion 101A forms an obtuse angle with respect to the substrate portion 83 from the edge portion of the substrate portion 83 of the guide portion 82 on the plate portion 85 side, and separates from the plate portion 85 in the plate thickness direction of the substrate portion 83. After extending in the direction, it has a curl shape that is folded back to the side opposite to the substrate portion 83 and connected to the plate portion 85 at an obtuse angle. The extension plate portion 102A and the extension plate portion 103A are parallel to each other. The distance between the outer surfaces of the extending plate portion 102A and the extending plate portion 103A facing in opposite directions in the radial direction of the disk is larger than the distance between the side surface 63A and the side surface 65A of the concave portion 53A by a predetermined tightening allowance. ..
[0086]
　In the pad spring 26A, the guide portion 82 is fitted to the pad guide portion 48A of the inner side torque receiving portion 32A on the output side in the disk rotation direction. At that time, the pad spring 26A is fitted to the concave portion 53A while the fitting portion 101A is elastically deformed in the radial direction of the disk. Therefore, in the guide portion 82 of the pad spring 26A, the plate portion 84 contacts the wall surface 61 in surface contact with the pad guide portion 48A, the substrate portion 83 contacts the bottom surface 52 in surface contact, and the plate portion 85 contacts the wall surface 62. Contact with the surface contact. Further, in the fitting portion 101A of the pad spring 26A, the extension plate portion 102A contacts the side surface 63A by surface contact, and the extension plate portion 103A contacts the side surface 65A by surface contact. In other words, the guide portion 82 of the pad spring 26A elastically fits into the pad guide portion 48A, and at that time, the fitting portion 101A elastically fits into the concave portion 53A. In this state, the fitting portion 101A is separated from the inner bottom surface 64A of the concave portion 53A.
[0087]
　Therefore, the guide portion 82 of the pad spring 26A is provided so as to be able to come into contact with the wall surface 61 and the bottom surface 52 on the outer side in the radial direction of the disc of the pad guide portion 48A. Further, the fitting portion 101A of the pad spring 26A protrudes from the guide portion 82 in the disk rotation direction and elastically fits into the concave portion 53A of the pad guide portion 48A. In other words, the fitting portion 101A is elastically deformed in the radial direction of the disk and fitted to the concave portion 53A, so that the fitting portion 101A is fitted to the concave portion 53A with respect to the outer side surface 63A in the disk radial direction and the inner side surface 65A in the radial direction of the disk. To give elastic force.
[0088]
　In the pad spring 26A attached to the pad guide portion 48A, the fitting portion 101A projects from the guide portion 82 toward the center of the disc 11 in the extending direction of the radial reference line and outward in the disc rotation direction, and the pad The guide portion 48A is elastically fitted in the concave portion 53A recessed in the same shape. In the fitting portion 101A, the extending plate portion 102A extends from the inner edge portion of the substrate portion 83 in the radial direction of the disk to the center side of the disk 11 in the extending direction of the radial reference line and the outer side in the disk rotation direction. .. Then, the extending plate portion 103A extends from the edge portion on the outer side of the plate portion 85 in the disc rotation direction to the center side of the disc 11 in the extending direction of the radial reference line and to the outside in the disc rotation direction. Further, the connecting plate portion 104A connects both end edges of the extension plate portion 102A and the extension plate portion 103A on the opposite sides of the guide portion 82 in a direction orthogonal to these.
[0089]
　In other words, after the fitting portion 101A extends from the inner edge portion of the substrate portion 83 of the guide portion 82 in the radial direction to the center side of the disc 11 in the extending direction of the radial reference line and outward in the disc rotation direction. , It is a curl shape that is folded inward in the radial direction of the disk and connected to the plate portion 85. The fitting portion 101A projects obliquely toward the center side of the disc 11 in the extending direction of the radial reference line and the outside in the disc rotation direction with respect to the substrate portion 83 that can abut on the bottom surface 52. The fitting portion 101A is provided at the inner end portion of the guide portion 82 in the radial direction of the disk.
[0090]
　In the disc brake 10A of the second embodiment, all the concave portions 53 are changed to the concave portions 53A as described above, and all the fitting portions 101 are fitted to the disc brake 10 of the first embodiment. It has the same configuration except that it is changed to the part 101A.
[0091]
　In the disc brake 10A of the second embodiment, the concave portion 53A of the pad guide portion 48A is inclined and recessed with respect to the bottom surface 52 of the pad guide portion 48A. The fitting portion 101A of the pad spring 26A is inclined and protrudes with respect to the substrate portion 83 that can abut on the bottom surface 52, and the fitting portion 101A elastically fits in the concave portion 53A. Therefore, the concave portion 53A and the fitting portion 101A that are inclined and fitted with respect to this direction prevent the inner portion of the guide portion 82 of the pad spring 26A in the radial direction of the disc from rising inward in the rotational direction of the disc. It can be further suppressed. Therefore, it is possible to further suppress the slight pressure squeal caused by the lifting of the guide portion 82 of the pad spring 26A.
[0092]
　The outline of each of the above-described embodiments is summarized below.
　The first aspect of the present invention is a disc brake that brakes the rotation of a disc that rotates together with the wheels of a vehicle. The direction of rotation of the disc is the direction of rotation of the disc, and the extending direction of the central axis of the disc is the direction of the disc axis. When the center side along the radial direction of the disc is the inner side in the radial direction of the disc and the side opposite to the central side along the radial direction of the disc is the outer side in the radial direction of the disc, the non-rotating portion of the vehicle. It has a mounting member having a pad guide portion having a shape recessed in the disc rotation direction, and a protruding portion inserted into the pad guide portion, and the protruding portion is guided to the pad guide portion. A pair of friction pads that can be moved in the direction of the disc axis, a caliper that is slidably provided with respect to the mounting member and presses the pair of friction pads on both sides of the disc, and the mounting member. With a pad spring that is attached to and elastically supports the friction pad, the pad guide portion is located in the area inside the disc radial direction at the bottom of the pad guide portion and in the region outside the disc radial direction. The pad spring has a concave portion recessed in the disc rotation direction from the bottom surface, and the pad spring is provided so as to be able to come into contact with the wall surface outside the disc radial direction of the pad guide portion and the bottom surface. It has a guide portion that guides movement along the disc axis direction, and a fitting portion that protrudes from the guide portion in the disc rotation direction and elastically fits into the concave portion.
　According to this configuration, it is possible to suppress the slight pressure squeal, which is the brake squeal generated during the slight pressure braking.
[0093]
　In the second aspect, in the first aspect, the fitting portion has a curl shape that extends inward in the radial direction of the disc after extending from the guide portion in the radial direction of the disc, and has a radius of the disc. By elastically deforming in the direction and being fitted into the concave portion, elastic force is applied to the outer side surface of the concave portion in the radial direction of the disk and the inner side surface in the radial direction of the disk.
[0094]
　In the third aspect, in the first or second aspect, the concave portion is recessed perpendicular to the bottom surface, and the fitting portion can abut on the bottom surface of the guide portion. It projects perpendicular to the bottom contact portion.
[0095]
　In the fourth aspect, in the first or second aspect, the concave portion is inclined and recessed with respect to the bottom surface, and the fitting portion can come into contact with the bottom surface of the guide portion. It protrudes at an angle with respect to the bottom contact portion.
Industrial applicability
[0096]
　According to the present invention, it is possible to suppress the slight pressure squeal generated during the fine pressure braking. Therefore, the industrial applicability is great.
Code description
[0097]
　10,10A Disc brake
　11 Disc 21,21A
　Mounting member
　22 Caliper
　25 Friction pad
　26,26A Pad spring
　48, 48A Pad guide part 51,
　51A Bottom
　52 Bottom
　53, 53A Concave
　61 Wall
　63 , 63A Side 65,
　65A Side
　82 Guide part
　83 Board part (bottom contact part)
　101,101A Fitting part
　132 Protruding part
The scope of the claims
[Claim 1]
　A disc brake that brakes the rotation of a disc that rotates with the wheels of a vehicle. The
　direction of rotation of the disc is the direction of rotation of the disc, the extending direction of the central axis of the disc is the direction of the axis of the disc, and the disc is along the radial direction of the disc. The center side of the disc is inside in the radial direction of the disc, and the side opposite to the center side of the disc along the radial direction of the disc is outside in the radial direction of the disc
　. It has a mounting member having a pad guide portion recessed in the disc rotation direction and
　a protruding portion inserted into the pad guide portion, and the protruding portion is guided by the pad guide portion to move in the disc axial direction. A pair of possible
　friction pads, a caliper that is slidably provided with respect to the mounting member and presses the pair of friction pads on both sides of the disc, and a caliper that
　is attached to the mounting member and elastically attaches the friction pad. The 　pad guide portion is provided with a pad spring that specifically supports the pad, and the pad guide portion is
recessed in 　　the area inside the disc radial direction at the bottom of the pad guide portion in the disc rotation direction with respect to the bottom surface of the disc radial direction outer region. It has a concave portion, and the 　pad spring is 　　provided so as to be able to come into contact with the wall surface outside the disc radial direction of the pad guide portion and the bottom surface, and guides the movement of the protruding portion along the disc axis direction. Information section and

A disc brake 　　having a fitting portion that protrudes from the guide portion in the direction of rotation of the disc and elastically fits into the concave portion .
[Claim 2]
　The fitting portion has
　　a curl shape that extends inward in the radial direction of the disc after extending from the guide portion in the rotational direction of the disc,
　　and is elastically deformed in the radial direction of the disc to fit into the concave portion.
The disc brake according to claim 1, wherein an elastic force is applied to the outer side surface of the concave portion in the radial direction of the disc and the inner side surface in the radial direction of the disc.
[Claim 3]
　1
　_
_ Or the disc brake described in 2.
[Claim 4]
　The concave portion is inclined and recessed with respect to the bottom surface, and the
　fitting portion is inclined and protrudes with respect to the bottom surface contact portion capable of contacting the bottom surface of the guide portion
. Item 1 or 2 Disc brake.