Title of invention: Rocker member and vehicle
Technical field
[0001]
　The present disclosure relates to rocker members and vehicles.
Background technology
[0002]
　In the automobile field, collision safety regulations are being tightened year by year, and it is extremely important to achieve both weight reduction and collision safety to improve fuel efficiency.
　In recent years, the development of eco-cars such as electric vehicles has been progressing from the viewpoint of protecting the global environment. In an electric vehicle, a large number of batteries are arranged under the floor. Therefore, in order to reduce the action of external force on the battery, it is important to improve the performance (mainly energy absorption performance) of the rocker member provided close to the battery.
[0003]
　Generally, a vehicle skeleton member provided on a vehicle side surface such as a rocker is manufactured by forming a hollow cross section with two hat members for weight reduction. Depending on the parts, performance is improved by arranging reinforcing members inside. Examples of the reinforcing member include a flat plate arranged between the hat members and a press-formed product arranged so as to be superposed on the hat member.
　As a method of arranging the reinforcing member, for example, a case where the reinforcing member is arranged along the longitudinal direction of the vehicle skeleton member and a case where the reinforcing member is arranged in the direction orthogonal to the longitudinal direction of the vehicle skeleton member can be considered. In the former case, since the plate thickness is partially increased, the strength of the region where the reinforcing member is present is improved. In the latter case, since the reinforcing member serves as a partition wall of the vehicle skeleton member, the torsional resistance is increased and the strength of the region where the reinforcing member is located is improved.
[0004]
　Deformation that occurs when an automobile collides is roughly divided into three types: bending deformation, axial crushing, and torsional deformation. Axial crushing and torsional deformation tend to cause deformation of the entire part, so that the amount of energy absorbed per part weight is high.
　On the other hand, in bending deformation, the amount of energy absorbed per part weight is small because the deformation region is limited. In particular, the smaller the collision object such as a utility pole (pole side collision), the smaller the deformation region, and therefore the smaller the amount of energy absorbed.
　Conventionally, the required amount of energy absorption has been secured by arranging a reinforcing member inside the skeleton member for a vehicle. However, in an actual collision, since the collision location is not limited, it is necessary to arrange the reinforcing member in a certain area, and an increase in the weight of the parts becomes an issue.
[0005]
　Therefore, Patent Document 1 discloses a structure in which a honeycomb structure made of aluminum or reinforced plastic is inserted inside a vehicle skeleton member such as a door pillar or a rocker constituting the vehicle to reinforce the vehicle skeleton member. ing.
　According to the invention described in Patent Document 1, by strengthening the inside of the vehicle frame member with the honeycomb structure, there is an effect that the reinforcing effect can be improved and the increase in the weight of the parts can be reduced.
Prior art literature
Patent documents
[0006]
Patent Document 1: Japanese Unexamined Patent Publication No. 2014-177270
Outline of the invention
Problems to be solved by the invention
[0007]
　However, in the technique described in Patent Document 1, the skeleton member for a vehicle is usually formed by bending a thin steel plate, and the honeycomb structure is composed of dissimilar members such as aluminum and reinforced plastic.
　Therefore, when joining the vehicle frame member and the honeycomb structure, it is necessary to prevent electrolytic corrosion between dissimilar metals. For this reason, Patent Document 1 is limited to the joining method using an organic adhesive or the like. Therefore, there is a problem that it is difficult to efficiently reinforce the vehicle skeleton member at an appropriate position without increasing the weight of the parts.
[0008]
　An object of the present disclosure is to provide rocker members and vehicles that can be efficiently reinforced at appropriate positions without increasing the weight of parts.
Means to solve problems
[0009]
　The rocker member of the present disclosure includes a hollow member and a reinforcing member, the hollow member includes a first surface and a second surface facing each other inside, and the reinforcing member is the inside of the hollow member. Standing on the first surface or the second surface, the reinforcing member is a tubular body having a polygonal cross section, and the longest side of the polygonal cross section is along the axial direction of the tubular body. There is a groove that extends.
[0010]
　When an external force acts on the rocker member in a direction crossing the longitudinal direction, the hollow member of the rocker member is bent and deformed or the cross section crossing the shaft of the hollow member is crushed according to the external force. The direction of the external force is the direction across the longitudinal direction of the rocker member. That is, the direction of the external force is the direction across the longitudinal direction for the hollow member and the direction generally along the axial direction of the reinforcing member for the reinforcing member. Crushing means that the cross section is crushed.
　Since the reinforcing member supports the hollow member in the initial stage of deformation due to an external force, the strength of the rocker member against an external force can be improved.
　On the other hand, in the state where the hollow member in the latter stage of deformation is crushed, the reinforcing member is also crushed in the axial direction of the reinforcing member as the hollow member is crushed and deformed. Buckling is when the reinforcing member collapses in the axial direction of the reinforcing member. The resistance of the reinforcing member to buckling can improve the strength of the rocker member against external force.
[0011]
　Here, the tubular body having a polygonal cross section is less likely to buckle because the ridges at the corners of the polygonal cross section have a reinforcing effect of supporting the tubular body when an external force is applied to the reinforcing member. On the other hand, the side portions between the corners of the polygonal cross section are easily deformed by an external force. Therefore, the reinforcing effect against external force is small. The longer the side length, the more easily the side portion is easily deformed, and the reinforcing effect on the mass of the reinforcing member is further reduced.
　Therefore, a groove is formed on the longest side of the polygonal cross section. If the long side is divided by the groove, the side becomes shorter and the side portion is less likely to be deformed. Further, the reinforcing effect can be enhanced by providing a ridge line along the axial direction of the tubular body inside or at the edge of the groove. As a result, the strength of the reinforcing member against the external force of the tubular body is improved. The groove portion may be a concave groove portion that is convex from the outside to the inside of the tubular body, or may be a convex portion that is convex from the inside to the outside of the tubular body.
[0012]
　In the shape of the cross section of the tubular body, the closer the angle of the corner is to 180 °, the lower the reinforcing effect of supporting the tubular body. Therefore, the cross-sectional shape of the tubular body is preferably triangular to dodecagonal.
　The smaller the radius of curvature of the corner of the polygonal cross section is preferable for the reinforcing effect as a ridgeline, but the smaller the radius of curvature, the more there is concern about breakage during molding. Therefore, the radius of curvature of the cross section of the ridgeline is preferably 3 mm or more and 15 mm or less at the center of the plate thickness.
　The reinforcing member made of a tubular body may be formed by combining a plurality of press-formed products. A reinforcing member may be formed by forming a flange portion on each press-formed product and joining the flange portions to each other.
[0013]
　In the present disclosure, it is preferable that the reinforcing member is joined with a first lid member that closes the end portion on the first surface side.
　By joining the first lid member to the end on the first surface side of the reinforcing member, the end of the reinforcing member is restrained. Therefore, it is possible to prevent the end portion on the first surface side from being partially deformed due to the partial action of the external force and causing variation in energy absorption.
[0014]
　In the present disclosure, the first lid member is preferably joined to the first surface.
　By joining the first lid member to the reinforcing member, the first lid member can be joined to the hollow member, so that welding workability is improved.
　Further, by joining the first lid member, the number of welded parts can be reduced as compared with the case where the end portion of the reinforcing member and the hollow member are joined by welding.
　Further, by joining the first lid member, a large joining area can be secured, and it is easy to adopt another joining method such as an adhesive having a lower joining strength as compared with welding joining.
[0015]
　In the present disclosure, the first lid member is preferably joined to a side surface portion between the first surface and the second surface of the hollow member.
　By joining the first lid member to the side surface portion, it is possible to restrain the movement of the reinforcing member not only in the axial direction of the tubular body but also in the direction orthogonal to the axial direction. Therefore, the force against the external force of the reinforcing member can be further improved.
[0016]
　In the present disclosure, it is preferable that the first lid member is joined at a position closer to the second surface than the first surface.
　When the hollow member is crushed and deformed, compression deformation occurs on the side close to the second surface of the hollow member. By joining the first lid member at a position close to the second surface, the joint portion of the reinforcing member can be a portion where compression deformation occurs when the hollow member is crushed and deformed. When welded, a low-strength heat-affected zone may occur around the weld. If the joint is tensilely deformed, it may break at the starting point of the heat-affected zone. Therefore, by joining the first lid member at a position close to the second surface, it is possible to suppress breakage around the joint portion when the hollow member is crushed and deformed.
[0017]
　In the present disclosure, it is preferable that the end portion of the reinforcing member on the first surface side and the hollow member are joined via an adhesive.
　Here, since the bonding strength of the adhesive is generally lower than that of welding, it is preferable that the material and amount of the adhesive are appropriately selected according to the bonding strength. For example, an adhesive may be filled in the hollow member, and the filled adhesive may be joined by burying the end portion of the reinforcing member on the first surface side.
[0018]
　Various methods can be considered for joining the end portion of the reinforcing member on the first surface side and the hollow member, and it is also possible to join via an adhesive. The adhesive can be bonded to each other even if the material of the hollow member and the material of the reinforcing member are different. Therefore, the degree of freedom in selecting the material of the hollow member and the reinforcing member can be improved.
[0019]
　In the present disclosure, it is preferable that the reinforcing member is joined with a second lid member that closes the end portion on the second surface side.
　When the rocker member is used in a vehicle, the second surface side of the hollow member faces the outside of the vehicle, and the outer surface of the vehicle is not always a flat surface. Further, even if a vehicle collides from the outside of the vehicle, a surface that applies an external force, such as a utility pole or another vehicle, is not always a flat surface. That is, the input of the external force from the second surface side of the reinforcing member is often non-uniform. Correspondingly, if the end portion of the reinforcing member on the second surface side is closed by the second lid member, the external force is prevented from being unevenly dispersed and acting on the reinforcing member, and the reinforcing member is deformed into a distorted shape. Can be prevented.
[0020]
　In the present disclosure, it is preferable that the reinforcing member has a polygonal cross section that is axisymmetric.
　If the cross-sectional shape of the reinforcing member is irregular, the reinforcing member is likely to be deformed in a specific direction, and may be bent in the middle of the deformation. As a countermeasure, if the cross section of the reinforcing member is line-symmetrical, the load is evenly distributed across the axis of symmetry, so that the strength of the reinforcing member against external force can be ensured.
[0021]
　In the present disclosure, the reinforcing member is preferably made of a steel material.
　Steel is usually used as the member of the vehicle, and by using steel as the reinforcing member, the bondability by welding or the like can be improved, and the manufacturing cost of the rocker member and the member cost can be reduced. ..
　In the present disclosure, the hollow member is preferably made of a steel material.
　Steel is usually used for the members that make up the vehicle, and if steel is used as the hollow member, the bondability with other parts can be improved, and the manufacturing cost and member cost of the rocker member can be reduced. Can be done.
[0022]
　The vehicle of the present disclosure is characterized in that the rocker member described above has the first surface of the hollow member arranged inside the vehicle and the second surface arranged outside the vehicle.
　A vehicle using the rocker member described above can be a vehicle capable of improving the strength against bending load and external force.
　Further, if the first surface of the hollow member is arranged inside the vehicle and the second surface is arranged outside the vehicle, the vehicle can withstand an external force from the outside of the vehicle.
A brief description of the drawing
[0023]
FIG. 1 is a cross-sectional view of a rocker member according to the first embodiment of the present disclosure.
FIG. 2 is an exploded perspective view of a rocker member according to the embodiment.
FIG. 3 is a cross-sectional view showing the structure of the reinforcing member according to the embodiment.
FIG. 4 is a cross-sectional view of a rocker member according to a second embodiment of the present disclosure.
FIG. 5 is a cross-sectional view showing a structure of a reinforcing member of a rocker member according to a third embodiment of the present disclosure.
FIG. 6 is a cross-sectional view showing a structure of a reinforcing member of a rocker member according to a fourth embodiment of the present disclosure.
FIG. 7 is a cross-sectional view showing a structure of a reinforcing member of a rocker member according to a fifth embodiment of the present disclosure.
FIG. 8 is a cross-sectional view showing a structure of a reinforcing member of a rocker member according to a sixth embodiment of the present disclosure.
FIG. 9 is a cross-sectional view of a rocker member according to a seventh embodiment of the present disclosure.
FIG. 10A is a cross-sectional view of a rocker member according to an eighth embodiment of the present disclosure.
FIG. 10B is a cross-sectional view of a rocker member that is a modification of the embodiment.
FIG. 10C is a cross-sectional view of a rocker member that is a modification of the embodiment.
FIG. 11 is a cross-sectional view of a rocker member according to a ninth embodiment of the present disclosure.
FIG. 12 is a cross-sectional view of a rocker member according to a tenth embodiment of the present disclosure.
FIG. 13 is a cross-sectional view of a rocker member according to the eleventh embodiment of the present disclosure.
FIG. 14 is a cross-sectional view showing a structure of a reinforcing member that is a modification of the embodiment of the present disclosure.
FIG. 15 is a cross-sectional view showing a structure of a rocker member that is a modification of the embodiment of the present disclosure.
FIG. 16 is a schematic diagram showing a test method for evaluating bending resistance performance in an example.
FIG. 17 is a graph showing the results of bending resistance performance of Examples and Comparative Examples.
FIG. 18 is a schematic diagram showing a test method for evaluating pressure-resistant crushing performance in an example.
FIG. 19 is a graph showing the results of pressure-resistant crushing performance of Examples and Comparative Examples.
FIG. 20 is a graph showing the results of pressure-resistant crushing performance with respect to a load from a vertical direction in an example.
FIG. 21 is a schematic diagram showing a modification of a test method for evaluating pressure-resistant crushing performance in an example.
FIG. 22 is a graph showing the result of pressure-resistant crushing performance due to a difference in the acting direction of an external force in an example.
FIG. 23 is a graph showing the results of pressure-resistant crushing performance due to differences in the acting direction of external force in the examples.
Mode for carrying out the invention
[0024]
　Hereinafter, embodiments of the present disclosure will be described.
　[1] First Embodiment In
　FIGS. 1 and 2, the rocker member 1 according to the first embodiment of the present disclosure is shown. FIG. 1 is a cross-sectional view orthogonal to the extending direction of the rocker member 1, and FIG. 2 is an exploded perspective view of the rocker member 1.
　The rocker member 1 is a member used for a vehicle such as an automobile and constitutes a locker for the vehicle.
　The rocker member 1 includes a hollow member 2 and a reinforcing member 3.
[0025]
　The hollow member 2 is made of a tubular body made of steel, and includes a first surface 2A and a second surface 2B that face each other inside. The hollow member 2 is formed by combining the inner component 21 and the outer component 22. It is not always necessary to use a steel material for the hollow member 2, and other materials such as aluminum and fiber reinforced synthetic resin (FRP) may be used.
　The inner component 21 is a steel material having a hat-shaped cross section, and for the steel material, for example, a high-strength steel having a thickness dimension of 1.6 mm and a tensile strength of 1180 MPa class can be used. The inner component 21 includes a bottom surface portion 21A, a side surface portion 21B, and a flange portion 21C.
[0026]
　The bottom surface portion 21A constitutes a hat-shaped bottom portion and becomes an inner side surface of the hollow member 2 when mounted on a vehicle body. The inner surface of the bottom surface portion 21A is the first surface 2A of the hollow member 2.
　The side surface portions 21B rise from each of the widthwise end portions of the bottom surface portion 21A, and the side surface portions 21B are arranged to face each other and become the upper surface and the lower surface of the hollow member 2 when mounted on the vehicle body.
　The flange portion 21C is formed by bending the tip of each side surface portion 21B outward.
[0027]
　The outer component 22 is a steel material having a hat-shaped cross section like the inner component 21, and includes a bottom surface portion 22A, two side surface portions 22B, and a flange portion 22C. The outer component 22 becomes an outer side surface of the hollow member 2 when mounted on the vehicle body. In the present embodiment, a part of the bottom surface portion 22A bulges outward according to the shape of the vehicle body. The inner surface of the bottom surface portion 22A is the second surface 2B of the hollow member 2.
　The flange portion 21C of the inner component 21 and the flange portion 22C of the outer component 22 are overlapped at the time of assembling the hollow member 2. The overlapped flange portions 21C and 22C are joined by spot welding or the like and integrated to form the hollow member 2.
[0028]
　As shown in FIGS. 2 and 3, the reinforcing member 3 is composed of a tubular body having a polygonal cross section, and is arranged inside the hollow member 2. In the present embodiment, the cross section of the tubular body is hexagonal.
　The reinforcing member 3 is arranged upright on the first surface 2A of the hollow member 2. The upright arrangement means an arrangement in which the shaft of the reinforcing member 3 which is a tubular body intersects the first surface 2A. The angle formed by the shaft of the reinforcing member 3 and the first surface 2A is approximately 90 °. Further, the hexagonal cross section of the reinforcing member 3 is formed in a flat shape having a long side and a short side, and the longitudinal direction of the hexagonal cross section is arranged along the longitudinal direction of the hollow member 2.
　The reinforcing member 3 has a ridge line 3A to a ridge line 3F extending in the axial direction of the tubular body from the apex of the hexagonal shape. The reinforcing member 3 has a pair of long side surfaces 3L in which the ridge lines 3B and the ridge lines 3E are formed at the farthest positions and are arranged to face each other. The hexagonal cross section of the reinforcing member 3 is, for example, in the case of FIG. 3, line symmetry centered on a line connecting the mating surfaces of the flange portions 34 located at both ends of the cross section.
[0029]
　The reinforcing member 3 is formed by combining a first member 31 and a second member 32 obtained by bending a steel plate. As the steel plate constituting the first member 31 and the second member 32, for example, high-strength steel having a thickness dimension of 1.6 mm and a tensile strength of 590 MPa class can be used.
　The first member 31 and the second member 32 are made of members having the same shape, and a pair of long side surfaces 3L are arranged in parallel with each other. A plurality of concave groove portions 33, and four concave groove portions 33 in the present embodiment are formed on the pair of long side surfaces 3L. The plurality of concave groove portions 33 are formed so as to divide each long side surface 3L in a cross section crossing the axis of the reinforcing member 3.
　Each concave groove portion 33 includes an inclined portion 331 and a bottom portion 332. The inclined portion 331 is formed as a recessed surface at an angle of 120 ° with respect to the long side surface 3L. The bottom portion 332 is formed so as to connect the tip ends of the inclined portion 331 in the concave direction, and is arranged parallel to the long side surface 3L.
[0030]
　Flange portions 34 extending outward in the width direction are formed at the ends of the first member 31 and the second member 32.
　The reinforcing member 3 can be manufactured by superimposing the flange portions 34 of the first member 31 and the second member 32 and joining them by spot welding or the like.
　The material of the reinforcing member 3 does not necessarily have to be a steel material, and other materials such as aluminum and fiber reinforced synthetic resin (FRP) may be adopted. However, from the viewpoint of the member cost and the manufacturing process such as the joining method, it is preferable to use the same material as the hollow member 2.
[0031]
　When the rocker member 1 is manufactured, as shown in FIG. 2, the flange portion 21C of the inner component 21 is arranged toward the upper surface, and the reinforcing member 3 is arranged on the bottom surface portion 21A of the inner component 21. Next, the bottom surface portion 21A and the end portions of the reinforcing member 3 on the first surface 2A side are joined by arc welding or the like. Finally, with the flange portion 22C of the outer component 22 facing downward, the flange portion 21C of the inner component 21 and the flange portion 22C of the outer component 22 are overlapped, and the flange portions 21C and 22C are welded and joined by spot welding or the like. To do.
[0032]
　As described above, such a rocker member 1 can be used as a rocker constituting the frame of the vehicle body. Further, the automobile used can be adopted not only for an automobile that runs on ordinary gasoline but also for an eco-car such as an electric vehicle.
　In particular, in the case of an electric vehicle, a battery for storing electricity is housed under the floor inside the vehicle. When an external force is applied from the vehicle body, if the battery is affected by the external force, the battery may be damaged. With the rocker member 1, the collision energy acting on the rocker of the vehicle can be absorbed by the buckling of the reinforcing member 3, so that damage to the battery housed inside the vehicle of the rocker can be prevented.
[0033]
　[2]
　Second Embodiment Next, the second embodiment of the present disclosure will be described. In the following description, the same parts as those already described will be designated by the same reference numerals and the description thereof will be omitted.
　In the first embodiment described above, the end portion of the reinforcing member 3 on the first surface 2A side is directly joined to the bottom surface portion 21A of the inner component 21 which is the first surface 2A of the hollow member 2.
[0034]
　On the other hand, in the rocker member 4 according to the present embodiment, as shown in FIG. 4, the ends of the plurality of reinforcing members 3 on the first surface 2A side are closed by the first lid member 5. The point is different.
　The first lid member 5 is made of, for example, a rectangular steel plate. As the steel sheet, for example, a high-strength steel having a thickness dimension of 1.6 mm and a tensile strength of 590 MPa class can be adopted.
　The end portion of each reinforcing member 3 on the first surface 2A side is joined to the facing surface of the first lid member 5 by welding or the like. Further, the surface of the first lid member 5 opposite to the facing surface to which the reinforcing member 3 of the first lid member 5 is joined is joined to the first surface 2A of the hollow member 2 by welding or the like.
[0035]
　When manufacturing the rocker member 4, first, the first lid member 5 is arranged on a surface plate, and the reinforcing member 3 is joined to the first lid member 5 by arc welding or the like. Next, the first lid member 5 is arranged together with the reinforcing member 3 on the bottom surface portion 21A of the inner component 21. Finally, the first lid member 5 and the bottom surface portion 21A are joined by arc welding or the like. After that, the rocker member 4 is assembled in the same procedure as in the first embodiment.
[0036]
　In the rocker member 4, a plurality of reinforcing members 3 are integrated by the first lid member 5, and the end portion of the reinforcing member 3 is restrained. Therefore, it is possible to prevent the external force from partially acting on the reinforcing member 3 and deforming into a distorted state, resulting in variations in energy absorption.
　In the rocker member 4, the first lid member 5 is joined to the bottom surface portion 21A of the inner component 21 by welding. Therefore, since welding can be performed between the steel plates, the weldability is improved and a large welding area can be secured. Further, since the reinforcing member 3 is integrated by the first lid member 5, the number of welded parts can be reduced as compared with the case where the end portion of each reinforcing member 3 is welded to the bottom surface portion 21A. In the present embodiment, the first lid member 5 is arranged so as to close the end portion of the reinforcing member 3 on the first surface 2A side. However, the present disclosure is not limited to this. For example, a second lid member that closes the end portion of the reinforcing member 3 on the second surface 2B side may be provided, or both the first lid member 5 and the second lid member may be provided.
[0037]
　[3] Third Embodiment
　Next, a third embodiment of the present disclosure will be described.
　In the first embodiment described above, the reinforcing member 3 is formed by welding the first member 31 and the second member 32 at the flange portion 34 and integrating them. Further, the concave groove portions 33 of the reinforcing member 3 were formed at four positions, and provided an inclined portion 331 and a bottom portion 332.
[0038]
　On the other hand, the reinforcing member 6 according to the present embodiment is different in that, as shown in FIG. 5, the reinforcing member 6 is integrally formed and two concave groove portions 61 for dividing one side are formed. Further, the cross-sectional shape of the concave groove portion 61 is also different.
　The reinforcing member 6 has an octagonal cross section having a ridge line 6A to a ridge line 6H.
　The concave groove portion 61 is formed at two positions on each long side surface 6L of the reinforcing member 6. Each concave groove portion 61 has two inclined portions 611, and the respective inclined portions 611 intersect at the tip in the concave direction. The inclined portion 611 is formed as a surface forming 120 ° with respect to the long side surface 6L, and the inclined portions 611 intersect with each other at an angle of 60 °.
[0039]
　The reinforcing member 6 can be manufactured by extruding iron, aluminum, synthetic resin, or the like and cutting it to a predetermined length. Considering the simplicity of moldability, the reinforcing member 6 is preferably made of aluminum, synthetic resin, or the like.
　By integrating the reinforcing member 6, the manufacturing of the reinforcing member 6 can be integrally formed at once by extrusion molding or the like, so that the labor for manufacturing the reinforcing member 6 can be reduced and the manufacturing cost can be reduced.
[0040]
　[4] Fourth Embodiment
　Next, a fourth embodiment of the present disclosure will be described.
　In the first embodiment described above, the long side surface 3L of the reinforcing member 3 is divided into a plurality of portions by the concave groove portion 33.
　On the other hand, in the present embodiment, as shown in FIG. 6, the reinforcing member 7 has a ridge line 7A to a ridge line 7D extending from a rectangular apex, and the longest long side surface 7L is formed by a ridge portion 71. The difference is that they are divided.
[0041]
　The reinforcing member 7 has a rectangular cross section, and the longest long side surface 7L of the rectangle is arranged so as to face each other. Two ridges 71 are formed on each long side surface 7L. Each convex portion 71 includes a side surface portion 711 and a front end surface portion 712.
　The side surface portion 711 extends outward in the out-of-plane direction of the long side surface 7L and forms an angle of 90 ° with the long side surface 7L. The tip surface portion 712 is formed as a surface that connects the tips of the side surface portions 711. The tip surface portion 712 is arranged parallel to the long side surface 7L.
　The present embodiment can also enjoy the same actions and effects as those of the above-described embodiment.
[0042]
　[5] Fifth Embodiment
　Next, a fifth embodiment of the present disclosure will be described.
　In the first embodiment described above, a plurality of concave groove portions 33 are formed only on the long side surface 3L of the reinforcing member 3.
　On the other hand, in the present embodiment, as shown in FIG. 7, the reinforcing member 8 has a plurality of concave groove portions 81 formed on a pair of long side surfaces 8L arranged so as to face each other. The difference is that the concave groove portions 82 are formed on the short side surfaces 8M and 8N of the reinforcing member 8.
[0043]
　The concave groove portion 82 is formed on a short side surface 8M between the ridge line 8A and the ridge line 8B at a rectangular corner and a short side surface 8N between the ridge line 8C and the ridge line 8D. The concave groove portion 82 includes a side surface portion 821 and a bottom surface portion 822.
　The side surface portion 821 is formed by bending the short side surfaces 8M and 8N by 90 °, and is arranged parallel to the long side surface 3L. The bottom surface portion 822 connects the tip portions of the side surface portions 821 in the recessed direction, and is arranged perpendicular to the long side surface 3L.
　The present embodiment can also enjoy the same actions and effects as those of the above-described embodiment.
[0044]
　[6] Sixth Embodiment
　Next, the sixth embodiment of the present disclosure will be described.
　In the first embodiment described above, the reinforcing member 3 has a concave groove portion 33 formed on each of the pair of long side surfaces 3L arranged so as to face each other.
　On the other hand, in the present embodiment, as shown in FIG. 8, the reinforcing member 9 has a concave groove portion 91 formed only on one long side surface 9L and formed on the other long side surface 9L. The difference is that it is not.
[0045]
　The concave groove portion 91 includes an inclined surface portion 911, a vertical surface portion 912, and a bottom surface portion 913.
　The inclined surface portion 911 is arranged so as to be inclined at a predetermined angle with respect to the long side surface 9L. The vertical surface portion 912 extends from the tip of the inclined surface portion 911 in the concave direction of the concave groove portion 91, and is arranged at an angle of 90 ° with respect to the long side surface 9L. The bottom surface portion 913 connects the tips of the vertical surface portions 912 to each other, and is arranged parallel to the long side surface 9L. The back surface of the bottom surface portion 913 is joined to the long side surface 9L by welding or the like.
　The present embodiment can also enjoy the same actions and effects as those of the above-described embodiment.
[0046]
　[7] Seventh Embodiment
　Next, the seventh embodiment of the present disclosure will be described.
　In the first embodiment described above, the reinforcing member 3 is a cut-off portion in which the end portion on the first surface 2A side is a cut portion of the first member 31 and the second member 32.
　On the other hand, the rocker member 10 of the present embodiment is different in that the bottom portion of the reinforcing member 11 extends outward in a flange shape as shown in FIG.
[0047]
　The reinforcing member 11 includes a reinforcing portion main body 111 and a flange portion 112. The reinforcing portion main body 111 has the same shape as the reinforcing member 3 of the first embodiment. The flange portion 112 is formed by bending the reinforcing portion main body 111 outward, and extends to the outside of the reinforcing member 3. The flange portion 112 is in contact with the first surface 2A of the hollow member 2. The contact surface of the flange portion 112 may or may not be joined by welding. However, if the reinforcing member 11 is joined by welding, the reinforcing member 11 is integrated with the hollow member 2, so that the strength of the reinforcing member 11 can be further improved.
　Further, a protrusion 113 is formed on the first surface 2A inside the reinforcing member 11, so that the inner side surface of the reinforcing member 11 comes into contact with the first surface 2A. The protrusion 113 can be formed on the inner surface of the first surface 2A by a welding heap or the like. By forming the protrusion 113, the movement of the reinforcing member 11 in the direction along the first surface 2A can be restrained, so that the reinforcing effect is further improved.
　The present embodiment can also enjoy the same actions and effects as those of the above-described embodiment.
[0048]
　[8] Eighth Embodiment
　Next, the eighth embodiment of the present disclosure will be described.
　In the second embodiment described above, the first lid member 5 is made of a rectangular steel plate.
　On the other hand, the rocker member 12 of the present embodiment is different in that the shape of the first lid member 13 is different as shown in FIG. 10A.
[0049]
　The first lid member 13 is interposed between the reinforcing member 3 and the first surface 2A of the hollow member 2. The first lid member 13 has a trapezoidal cross section and is formed by bending a steel plate. The first lid member 13 includes a bottom surface portion 131 and an inclined surface portion 132.
　One surface of the bottom surface 131 abuts on the end of the reinforcing member 3 on the first surface 2A side, and the other surface abuts on the first surface 2A and is joined by welding. The inclined surface portion 132 is provided so as to stand upright from the widthwise end portion of the bottom surface portion 131 at a predetermined angle. The inclination angle of the inclined surface portion 132 is set so as to follow the inner surface shape of the inner component 21 constituting the hollow member 2.
　The tip of the inclined surface portion 132 extends to the bent position of the flange portion 21C of the inner component 21 of the hollow member 2.
[0050]
　The present embodiment can also enjoy the same actions and effects as those of the above-described embodiment.
　By forming the first lid member 13 with a trapezoidal steel plate, the first lid member 13 does not move inside the hollow member 2. Therefore, it is possible to prevent the reinforcing member 3 and the hollow member 2 from moving relatively, so that the reinforcing effect of the reinforcing member 3 is further improved.
[0051]
　Further modifications can be adopted in this embodiment. For example, as shown in FIG. 10B, the extending portion 133 may be formed at the tip of the inclined surface portion 132 of the first lid member 13 of the rocker member 12B. The extending portion 133 extends to a position closer to the second surface 2B than the first surface 2A of the hollow member 2. The extending portion 133 is joined to the side surface portion 22B of the outer component 22 of the hollow member 2 by welding or the like.
　Further, a bent protrusion 131B is formed on the bottom surface portion 131 of the first lid member 13, so that the outer side surface of the reinforcing member 3 comes into contact with the bottom surface portion 131. By forming the bent protrusion 131B, the movement of the reinforcing member 3 along the first surface 2A is restricted, so that the reinforcing effect is further improved.
　In the rocker member 12B, when the hollow member 2 is crushed and deformed, the joint portion between the extending portion 133 and the side surface portion 22B is deformed in the compression direction. Considering the influence of the heat-affected zone, the joint is less likely to be broken when it is compressively deformed than when it is tensilely deformed. Therefore, it is possible to improve the joint strength of the joint portion at the time of crush deformation.
[0052]
　As shown in FIG. 10C, the tip of the first lid member 13 of the rocker member 12C may be bent to form the flange portion 134, which may be sandwiched between the flange portion 21C and the flange portion 22C of the hollow member 2.
　Further, a bent protrusion 131C is formed on the bottom surface portion 131 of the first lid member 13, so that the inner side surface of the reinforcing member 3 comes into contact with the bent protrusion 131C. In this case as well, the movement of the reinforcing member 3 along the first surface 2A is restricted, so that the reinforcing effect is further improved.
　By using the rocker member 12C, the movement of the first lid member 13 is completely restrained, so that the reinforcing effect of the reinforcing member 3 is further improved.
[0053]
　[9] Ninth Embodiment
　Next, the ninth embodiment of the present disclosure will be described.
　In the rocker member 1 of the first embodiment described above, the reinforcing member 3 is joined to the bottom surface portion 21A of the inner component 21 constituting the hollow member 2 by welding.
　On the other hand, the rocker member 14 of the present embodiment is different in that the reinforcing member 3 is joined to the first surface 2A of the hollow member 2 by the adhesive 15, as shown in FIG. As the adhesive 15, any adhesive such as a thermosetting synthetic resin adhesive and a photocurable synthetic resin adhesive can be adopted. However, it is preferable to use an adhesive 15 to have flame retardancy by adding a flame retardant or the like.
[0054]
　When manufacturing the rocker member 14, the bottom surface portion 21A of the inner component 21 of the hollow member 2 is arranged on a surface plate or the like. Next, after the reinforcing member 3 is arranged on the bottom surface portion 21A, the adhesive 15 is poured into the hat-shaped recess of the inner component 21. Finally, heat or light is applied to cure the adhesive 15. After that, the rocker member 14 is assembled by the same procedure as in the first embodiment.
[0055]
　The adhesive 15 can join the hollow member 2 and the reinforcing member 3 even if they are made of different materials. Therefore, the degree of freedom in selecting the materials of the hollow member 2 and the reinforcing member 3 can be improved, and the rocker member 14 having appropriate performance can be obtained.
　Further, since the reinforcing member 3 can be joined to the hollow member 2 simply by pouring the adhesive 15 into the hat-shaped recess of the inner component 21 constituting the hollow member 2, the workability is also good.
[0056]
　[10] Tenth Embodiment
　Next, the tenth embodiment of the present disclosure will be described.
　The reinforcing members 3 of the first embodiment described above are combined so that the long side surfaces 3L of the first member 31 and the second member 32 are parallel to each other.
　On the other hand, the rocker member 16 of the present embodiment includes a reinforcing member 17 having a different cross-sectional shape in the axial direction, as shown in FIG. Specifically, the reinforcing member 17 gradually narrows from the first surface 2A of the hollow member 2 toward the tip.
[0057]
　The reinforcing member 17 includes a first member 171 and a second member 172. Although not shown, the first member 171 has a cross section similar to that of the first member 31 of the first embodiment. However, in the first member 171, the amount of dent in the recessed groove is gradually reduced from the end on the first surface 2A side. Similarly to the first member 171 of the second member 172, the amount of the recessed groove portion is small. When an external force acts, the reinforcing member 17 preferentially buckles from a portion having a small cross section. Therefore, the reinforcing member 17 can be buckled in order from a position located outside the vehicle body. That is, the reinforcing member 17 is hard to bend and buckling is stable.
　The first member 171 and the second member 172 are joined by welding by butting the flange portions formed at the respective ends to manufacture the reinforcing member 17.
　The present embodiment can also enjoy the same actions and effects as those of the above-described embodiment.
[0058]
　[11] Eleventh Embodiment
　Next, the eleventh embodiment of the present disclosure will be described.
　The end portion of the reinforcing member 3 of the first embodiment described above on the outer component 22 side is on one virtual plane.
　On the other hand, in the reinforcing member 19 of the rocker member 18 of the present embodiment, as shown in FIG. 13, a plurality of notched portions 191 are formed at the end portion of the reinforcing member 19 on the outer component 22 side. The point is different.
[0059]
　A plurality of notch portions 191 are formed along the width direction of the reinforcing member 19, and the shape of each notch portion 191 is rectangular. When such a notch portion 191 is formed, it can be formed by using a rectangular wavy blade as a blade for cutting the first member and the second member constituting the reinforcing member 19. The shape of the notch 191 is not limited to this, and may be, for example, a triangular notch.
　The present embodiment can also enjoy the same actions and effects as those of the above-described embodiment.
　Further, since the plurality of cutout portions 191 are formed, the portion of the cutout portion 191 is crushed first when an axial force is applied. Since the portion adjacent to the portion of the reinforcing member 19 that has buckled in the axial direction is also deformed, the reinforcing member 19 is more likely to buckle in the axial direction of the reinforcing member 19 than the portion that is not deformed. That is, by buckling the portion where the notch portion 191 is located first, buckling can be caused in the axial direction of the reinforcing member 19 from the outside of the vehicle to the inside of the vehicle.
[0060]
　[12] Modifications of the Embodiment The
　present disclosure is not limited to each of the above-described embodiments, and other structures can be adopted as long as the object of the present disclosure can be achieved.
　In the first embodiment described above, four concave groove portions 33 are formed on the long side surface 3L to form the reinforcing member 3, but the present disclosure is not limited to this. For example, as shown in FIG. 14, a reinforcing member 19 in which only one concave groove portion 33 is formed on the long side surface 19L may be adopted.
[0061]
　In the first embodiment described above, the longitudinal direction of the cross section of the reinforcing member 3 with respect to the axis is arranged along the longitudinal direction of the hollow member 2, but the present disclosure is not limited to this. For example, as shown in FIG. 15, the rocker member 20 may be formed by arranging the reinforcing member 201 in the longitudinal direction in a direction orthogonal to the longitudinal direction of the hollow member 2.
　In addition, the specific structure, shape, etc. at the time of implementation of the present disclosure may be other structures, etc. as long as the object of the present disclosure can be achieved.
Example
[0062]
　The rocker member 1 of the first embodiment and the rocker member 4 of the second embodiment were evaluated for bending resistance and pressure-resistant crushing performance.
　[1] Evaluation of bending resistance performance As
　shown in FIG. 16, the rocker member 1 (Example 1) is supported by two poles P1, and the collision load of the poles P2 is applied to the center of the rocker member 1 to cause a rocker. The bending resistance performance of the member 1 was evaluated. In the rocker member 1, a reinforcing member 3 formed of high-tensile steel having a thickness of 1.6 mm and a tensile strength of 590 MPa is arranged inside the hollow member 2. The reinforcing member 3 weighed 880 g / piece.
[0063]
　The support span S between the poles P1 was set to 1000 mm, and the pole P2 was set to 250 mmφ, assuming a utility pole or the like. The bending load was applied from the side of the outer component 22 of the hollow member 2 arranged on the outer side of the vehicle body.
　Further, as a comparative example, the bending resistance performance of a rocker member in which the reinforcing member 3 is not provided inside the hollow member 2 was also evaluated.
　As the evaluation characteristic value, a value obtained by dividing the load applied by the pole P2 by the mass of the rocker member (load / member mass: kN / kg) was adopted.
[0064]
　When the bending resistance performance of Example 1 and Comparative Example was evaluated, the results shown in FIG. 17 were obtained. The horizontal axis of FIG. 17 is the stroke amount of the pole P2 (the amount of movement after the pole P2 comes into contact with the rocker member 1).
　In the case of the comparative example, as shown in the graph G1 of FIG. 17, the bending resistance performance of 15 kN / kg or less was obtained even at the maximum value.
[0065]
　On the other hand, in Example 1, as shown in the graph G2 of FIG. 17, the maximum value of 20 kN / kg or more could be obtained. Therefore, it was confirmed that by arranging the reinforcing member 3 inside the hollow member 2, the bending resistance performance is remarkably improved without causing a significant increase in the weight of the parts.
[0066]
　[2] Evaluation of pressure-resistant crushing performance As
　shown in FIG. 18, rocker members 1 and 4 are supported by a rigid wall W1, and an external force of a pole P2 is applied to the center of rocker members 1 and 4, and rocker members 1 and 4 are applied. The pressure resistance crushing performance of was evaluated. The rigid wall is perpendicular to the direction of action of the external force.
　An external force of a 250 mmφ pole P2 was applied to a position (center) where the reinforcing members 3 of the rocker members 1 and 4 were arranged.
[0067]
　Similar to the evaluation of the bending load performance, as a comparative example, the pressure-resistant crushing performance of the rocker member in which the reinforcing member 3 is not provided inside the hollow member 2 was evaluated.
　As for the evaluation characteristic value, the value obtained by dividing the load applied by the pole P2 by the masses of the rocker members 1 and 4 (load / member mass: kN / kg) was adopted as in the evaluation of the bending resistance performance.
[0068]
　The pressure-resistant crushing performance of the rocker member 1 (Example 2) and the rocker member (comparative example) in which the reinforcing member 3 is not arranged inside was compared, and the results shown in FIG.
　In the comparative example, as shown in the graph G3 of FIG. 19, only the pressure resistance crushing performance of about 20 kN / kg was obtained even at the maximum value.
　On the other hand, as shown in the graph G4 of FIG. 19, the pressure-resistant crushing performance of Example 1 was able to obtain the maximum value of 100 kN / kg. Therefore, it was confirmed that by arranging the reinforcing member 3 inside the hollow member 2, the pressure-resistant crushing performance is remarkably improved without causing a significant increase in the weight of the parts.
[0069]
　According to the evaluation method shown in FIG. 18, the rocker member 1 (Example 3) described in the first embodiment and the rocker member 4 (Example) including the first lid member 5 described in the second embodiment. When the pressure-resistant crushing performance of 4) was compared, the result shown in FIG. 20 was obtained.
　Example 3 was the result of graph G5 of FIG. On the other hand, Example 4 was the result of graph G6 of FIG.
　It was confirmed that both Example 3 and Example 4 gave good results. Therefore, it was confirmed that the rocker members 1 and 4 have the same pressure-resistant crushing performance when a load is applied from the vertical direction.
[0070]
　As shown in FIG. 21, the rigid wall W1 supporting the rocker members 1 and 4 is tilted by 10 ° as compared with FIG. 18, and the pressure resistant collapse of the rocker members 1 and 4 when an external force acts on the rocker member 1 from an oblique direction. Performance was evaluated.
　The load-bearing performance in the diagonal direction assumes the case where the vehicle collides with a utility pole or the like from an oblique direction, and is one of the vehicle side collision test methods in NHTSA (National Highway Traffic Safety Administration).
[0071]
　With respect to the rocker member 1, the pressure resistance when an external force is applied from a vertical direction as shown in FIG. 18 (Example 5) and when an external force is applied from an oblique direction as shown in FIG. 21 (Example 6). The crushing performance was the result shown in FIG.
　The result of Example 5 was the result of the graph G7 of FIG. 22, and it was confirmed that the embodiment had sufficient pressure-resistant crushing performance. However, in Example 6, as a result of the graph G8 of FIG. 22, it was confirmed that although the pressure-resistant crushing performance was sufficient, the pressure-resistant crushing performance was lower than that in Example 5.
[0072]
　On the other hand, in the rocker member 4 using the first lid member 5, the result shown in FIG. 23 was obtained. The result when an external force in the vertical direction is applied (Example 7) is graph G9 of FIG. 23. On the other hand, the result when an external force in the oblique direction was applied (Example 8) was the graph G10 in FIG. It was confirmed that the rocker member 4 has the same level of pressure-resistant crushing performance in each case.
　From this, it means that the pressure-resistant crushing performance of the rocker member 4 does not change significantly due to an external force acting from other than the axial direction of the reinforcing member 3, and that the rocker member 4 has high robustness.
Description of the sign
[0073]
　1 ... Rocker member, 2 ... Hollow member, 2A ... 1st surface, 2B ... 2nd surface, 3 ... Reinforcing member, 3A ... Ridge line, 3B ... Ridge line, 3E ... Ridge line, 3F ... Ridge line, 3L ... Long side surface, 4 ... Rocker member, 5 ... 1st lid member, 6 ... Reinforcing member, 6A ... Ridge line, 6G ... Ridge line, 6H ... Ridge line, 6L ... Long side surface, 7 ... Reinforcing member, 7A ... Ridge line, 7D ... Ridge line, 7L ... Long Side surface, 8 ... Reinforcing member, 8A ... Ridge line, 8B ... Ridge line, 8C ... Ridge line, 8D ... Ridge line, 8L ... Long side surface, 8M ... Short side surface, 8N ... Short side surface, 9 ... Reinforcing member, 9L ... Long Side surface, 10 ... rocker member, 11 ... reinforcing member, 12 ... rocker member, 13 ... first lid member, 14 ... rocker member, 15 ... adhesive, 16 ... rocker member, 17 ... reinforcing member, 18 ... rocker member, 19 ... Reinforcing member, 19L ... Long side surface, 20 ... Rocker member, 21 ... Inner part, 21A ... Bottom part, 21B ... Side part, 21C ... Flange part, 22 ... Outer part, 22A ... Bottom part, 22B ... Side part , 22C ... Flange portion, 31 ... First member, 32 ... Second member, 33 ... Concave groove portion, 34 ... Flange portion, 61 ... Concave groove portion, 71 ... Convex portion, 81 ... Concave groove portion, 82 ... Concave groove portion, 91 ... concave groove portion, 111 ... reinforcing portion main body, 112 ... flange portion, 131 ... bottom surface portion, 132 ... inclined surface portion, 133 ... extending portion, 134 ... flange portion, 171 ... first member, 172 ... second member, 191 ... Notch, 201 ... Reinforcing member, 331 ... Inclined part, 332 ... Bottom, 611 ... Inclined part, 711 ... Side part, 712 ... Tip surface part, 821 ... Side part, 822 ... Bottom part, 911 ... Inclined surface part, 912 ... Vertical Face part, 913 ... bottom part, P1 ... pole, P2 ... pole, S ... support span, W1 ... rigid wall.
The scope of the claims
[Claim 1]
　The hollow member includes a hollow member and a
　reinforcing member
, the
　hollow member includes a first surface and a second surface facing each other inside, and the
　reinforcing member is the first surface or the second surface inside the hollow member. Standing on a surface, the
　reinforcing member is a tubular body having a polygonal cross section, and
　a
rocker member having a groove extending along the axial direction of the tubular body on the longest side of the polygonal cross section. ..
[Claim 2]
　The rocker member according to claim 1,
　wherein a first lid member that closes an end portion on the first surface side is joined to the reinforcing member.
[Claim 3]
　In the rocker member according to claim 2,
　the first lid member is a rocker member joined to the first surface.
[Claim 4]
　In the rocker member according to claim 2,
　the first lid member is a rocker member joined to a side surface portion between the first surface and the second surface of the hollow member.
[Claim 5]
　In the rocker member according to claim 4,
　the first lid member is a rocker member joined at a position closer to the second surface than the first surface.
[Claim 6]
　The rocker member according to claim 1,
　wherein the end portion of the reinforcing member on the first surface side and the hollow member are joined via an adhesive.
[Claim 7]
　The rocker member according to any one of claims 1 to 6
　, wherein a second lid member that closes an end portion on the second surface side is joined to the reinforcing member.
[Claim 8]
　The rocker member according to any one of claims 1 to 7,
　wherein the reinforcing member is a rocker member having a polygonal cross section that is line-symmetrical.
[Claim 9]
　The rocker member according to any one of claims 1 to 8,
　wherein the reinforcing member is a rocker member made of a steel material.
[Claim 10]
　The rocker member according to any one of claims 1 to 9,
　wherein the hollow member is a rocker member made of a steel material.
[Claim 11]
　A vehicle in which the rocker member according to any one of claims 1 to 10 has a first surface of the hollow member arranged inside the vehicle and the second surface arranged outside the vehicle.