Title of invention: Skeleton member for vehicle and vehicle
Technical field
[0001]
　The present disclosure relates to vehicle frame 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, since a large number of batteries are arranged under the floor, it is important to improve the performance (mainly energy absorption performance) of a locker installed close to the batteries.
[0003]
　In general, vehicle skeleton members such as bumpers, pillars, and rockers have a hollow cross section for weight reduction, and some parts are provided with reinforcing members to improve performance.
　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, the plate thickness is partially increased, so that 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 is a utility pole or the like (pole side collision, pole front collision), the smaller the deformation region is, and therefore the amount of energy absorbed is further reduced.
　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 vehicle frame member 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 a vehicle skeleton member and a vehicle that can be efficiently reinforced at an appropriate position without increasing the weight of parts.
Means to solve problems
[0009]
　The vehicle skeleton 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 has a pseudo-circular cross section. The reinforcing member has a cylindrical body, and the reinforcing member stands on the first surface or the second surface inside the hollow member.
　Here, the pseudo-circular cross section is a concept that includes not only a strict perfect circular cross section but also an elliptical cross section having a certain aspect ratio.
[0010]
　When an external force acts on the vehicle skeleton member in a direction crossing the longitudinal direction, the hollow member of the vehicle skeleton member is bent and deformed or the hollow member is crushed according to the external force. Crushing means that the cross section of the hollow member across the shaft is crushed. The direction of the external force is a direction that crosses the longitudinal direction (axial direction) of the hollow member, and is a direction that is substantially along the axial direction of the reinforcing member with respect to the reinforcing member.
　At this time, since the reinforcing member supports the hollow member at the initial stage of deformation due to the external force, the strength of the vehicle skeleton member against the pressing 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 well as the hollow member is crushed. It is said that the reinforcing member is buckled when it collapses in the axial direction of the reinforcing member. The resistance to buckling of the reinforcing member can improve the strength of the vehicle skeleton member against an external force.
[0011]
　In particular, the reinforcing member is a cylindrical body having no ridge line having a large resistance in the axial direction. Therefore, even if a load is applied to the vehicle skeleton member from an oblique direction, the deformation resistance is constant at any part, so that the reinforcing member buckles stably. Therefore, the strength against an external force can be improved regardless of the direction of the force acting on the vehicle skeleton member.
　Further, since the reinforcing member is not a solid body but a cylindrical body, the increase in weight can be reduced even if the reinforcing member is arranged in the hollow member, so that the weight of the component does not increase.
[0012]
　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 crushing load from partially acting on the reinforcing member, causing the end portion on the first surface side to be distorted and causing variations in energy absorption.
[0013]
　In the present disclosure, it is preferable to include a joint portion between the first lid member and the hollow member.
　By joining the first lid member to the reinforcing member, the first lid member can be joined to the hollow member, so that the workability at the time of joining is improved.
　Further, by joining the first lid member, it is possible to reduce the number of joints 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.
[0014]
　In the present disclosure, the joint portion is preferably a welded portion on a side surface portion between the first surface and the second surface of the hollow member.
　The first surface of the hollow member is tensilely deformed when a load is applied from the second surface side of the hollow member. When the joint is a weld, a heat-affected zone is generated around the weld. The heat-affected zone may be damaged by tensile deformation. That is, if there is a welded portion on the first surface of the hollow member, the heat-affected zone may be damaged when a load is applied from the second surface side of the hollow member, and the performance of the hollow member may be significantly deteriorated. Therefore, the first lid member is extended to the side surface portion, and a welded portion is provided on the side surface portion. Since the welded portion is less likely to be tensilely deformed, the welded portion is less likely to be broken.
[0015]
　In the present disclosure, it is preferable that the welded portion is located closer to the second surface than the first surface.
　If the welded portion is located closer to the second surface than the first surface of the hollow member, the second surface side of the hollow member is compressed and deformed, so that the welded portion is less likely to be broken.
[0016]
　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 the bonding strength by welding, it is preferable that the material and amount of the adhesive are appropriately selected according to the required 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.
[0017]
　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.
[0018]
　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 a vehicle skeleton member is used in a vehicle, the second surface side of the hollow member may face 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.
[0019]
　In the present disclosure, the pseudocircular cross section of the reinforcing member is preferably an ellipse having a ratio of a major axis to a minor axis of 2.5 or less.
　As described above, the pseudo-circular cross section includes not only a perfect circular cross section but also an elliptical cross section. However, if the ratio of the long axis to the short axis is more than 2.5 and flattened, the reinforcing member may be bent at the time of deformation, or may easily fall down depending on the direction of the external force. Therefore, in order to crush the reinforcing member together with the crushing of the hollow member, a cross section in a range in which the ratio of the major axis to the minor axis can be regarded as a circle of 2.5 or less is preferable.
[0020]
　In the present disclosure, it is preferable that a plurality of the reinforcing members are arranged inside the hollow member, and the distance between the shafts of the cylindrical body of each reinforcing member is four times or less the diameter of the reinforcing member.
　If a plurality of reinforcing members are arranged inside the hollow member, the strength against external force is improved accordingly. At this time, if the distance between the reinforcing members is too large, the vehicle skeleton member is easily deformed depending on the collision position, and sufficient strength against an external force cannot be secured. Therefore, by setting the distance between the shafts of the plurality of reinforcing members to be four times or less the diameter of the reinforcing member, the reinforcing members can be arranged at appropriate intervals to ensure the reinforcing effect of the hollow member.
[0021]
　In the present disclosure, the reinforcing member is preferably made of a steel material.
　Steel is usually used as the member constituting the vehicle, and by using steel as the reinforcing member, the bondability by welding or the like can be improved. In addition, since the steel material is easy to process and inexpensive, it is possible to reduce the manufacturing cost and the member cost of the skeleton member for a vehicle.
　In the present disclosure, the hollow member is preferably made of a steel material.
　A steel material is usually used as the member constituting the vehicle, and if a steel material is used as the hollow member, the bondability with other parts can be improved. In addition, since the steel material is easy to process and inexpensive, it is possible to reduce the manufacturing cost and the member cost of the skeleton member for a vehicle.
[0022]
　The vehicle of the present disclosure is characterized in that the vehicle skeleton member described above has the first surface of the hollow member arranged inside the vehicle and the second surface arranged outside the vehicle.
　If the vehicle uses the above-mentioned vehicle skeleton member, the strength of the vehicle against an external force can be improved.
　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 vehicle skeleton member according to the first embodiment of the present disclosure.
FIG. 2 is an exploded perspective view of a vehicle skeleton member according to the embodiment.
FIG. 3 is a cross-sectional view of a vehicle skeleton member according to a second embodiment of the present disclosure.
FIG. 4 is an exploded perspective view of a vehicle skeleton member according to the embodiment.
FIG. 5 is a cross-sectional view of a vehicle skeleton member according to a third embodiment of the present disclosure.
FIG. 6 is a cross-sectional view of a vehicle skeleton member according to a fourth embodiment of the present disclosure.
FIG. 7A is a cross-sectional view of a vehicle skeleton member according to a fifth embodiment of the present disclosure.
FIG. 7B is a cross-sectional view of a vehicle skeleton member that is a modification of the embodiment.
FIG. 7C is a cross-sectional view of a vehicle skeleton member that is a modification of the embodiment.
FIG. 8 is a cross-sectional view of a vehicle skeleton member according to a sixth embodiment of the present disclosure.
FIG. 9 is a schematic diagram showing a test method for evaluating bending resistance performance in an example.
FIG. 10 is a graph showing the results of bending resistance performance of Examples and Comparative Examples.
FIG. 11 is a schematic diagram showing a test method for evaluating pressure-resistant crushing performance in an example.
FIG. 12 is a graph showing the results of pressure-resistant crushing performance of Examples and Comparative Examples.
FIG. 13 is a graph showing the results of pressure-resistant crushing performance with respect to a load from the vertical direction in the embodiment.
FIG. 14 is a schematic diagram showing a modification of a test method for evaluating pressure-resistant crushing performance in an example.
FIG. 15 is a graph showing the results of pressure-resistant crushing performance due to differences in the acting direction of the crushing load in the examples.
FIG. 16 is a graph showing the results of pressure-resistant crushing performance due to the difference in the acting direction of the crushing load in the examples.
Mode for carrying out the invention
[0024]
　Hereinafter, embodiments of the present disclosure will be described.
　[1] First Embodiment
　FIGS. 1 and 2 show a vehicle skeleton member 1 according to the first embodiment of the present disclosure. FIG. 1 is a cross-sectional view orthogonal to the extending direction of the vehicle skeleton member 1, and FIG. 2 is an exploded perspective view of the vehicle skeleton member 1.
　The skeleton member 1 for a vehicle is a member used for a vehicle such as an automobile and constitutes a frame of a vehicle body such as a rocker and a door pillar. The vehicle skeleton member 1 can also be provided in front of the vehicle body, and is also used as a bumper that absorbs energy in a frontal collision. The vehicle skeleton 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-tensile steel plate 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 when mounted on the 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. The side surface portion 21B becomes 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 the 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 with each other when the hollow member 2 is assembled. The overlapped flange portions 21C and 22C are joined by arc welding or the like and integrated to form the hollow member 2.
[0028]
　The reinforcing member 3 is composed of a cylindrical steel pipe, and a plurality of reinforcing members 3 are arranged inside the hollow member 2. 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 °. For the steel pipe used as the reinforcing member 3, for example, high-strength steel having a thickness dimension of 1.6 mm and a tensile strength of 590 MPa class can be used.
[0029]
　The reinforcing member 3 can be manufactured by cutting a pipe material to a predetermined length, but it does not have to be a seamless pipe. A welded pipe may be adopted.
　Further, 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.
[0030]
　The reinforcing members 3 are arranged in the center of the first surface 2A of the hollow member 2, and as shown in FIG. 2, a plurality of the reinforcing members 3 are arranged in the extending direction of the hollow member 2, and five in the present embodiment are arranged side by side. The ends of the respective reinforcing members 3 on the first surface 2A side are joined to the first surface 2A of the hollow member 2 by arc welding or the like.
　The distance between the shafts of the cylinders of the plurality of reinforcing members 3 is preferably a distance at which a slight gap is formed between the adjacent reinforcing members 3, and is preferably set to 4 times or less the diameter of the reinforcing members 3. If the distance between the shafts of the cylinders of the plurality of reinforcing members 3 is less than twice the diameter of the shafts of the cylinders, the adjacent reinforcing members 3 interfere with each other, making it difficult to arrange the reinforcing members 3 and to manufacture them. Further, if the reinforcing members 3 are arranged at such intervals, the reinforcing effect of the hollow member 2 can be ensured.
[0031]
　The reinforcing member 3 does not have to be a cylindrical body having a strict circular cross section. For example, the pseudo-circular cross section of the cylindrical body of the reinforcing member 3 includes an ellipse having a major axis to minor axis ratio of 2.5 or less. In short, if the reinforcing member 3 has a flat shape that stably causes buckling deformation when an external force is applied in the axial direction, the reinforcing member 3 is allowed.
[0032]
　When manufacturing the vehicle skeleton member 1, as shown in FIG. 2, the flange portion 21C of the inner component 21 is arranged toward the upper surface, and a plurality of reinforcing members 3 are 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, the flange portion 22C of the outer component 22 is directed 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.
[0033]
　As described above, such a vehicle skeleton member 1 can be used as a rocker, a door pillar, and a bumper 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 acts on the vehicle body, the influence of the external force on the battery may cause damage to the battery. Therefore, the vehicle skeleton member 1 is preferably used as a rocker provided below the side surface of the vehicle body.
[0034]
　[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.
[0035]
　On the other hand, in the vehicle skeleton member 4 according to the present embodiment, as shown in FIGS. 3 and 4, the ends of the plurality of reinforcing members 3 on the first surface 2A side are formed by the first lid member 5. The difference is that it is blocked.
　The first lid member 5 is made of 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 ends of the respective reinforcing members 3 on the first surface 2A side are joined to the facing surfaces 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.
[0036]
　When manufacturing the vehicle skeleton member 4, first, the first lid member 5 is arranged on the 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 vehicle skeleton member 4 is assembled in the same procedure as in the first embodiment.
[0037]
　In the vehicle skeleton 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 vehicle skeleton 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.
[0038]
　[3] Third Embodiment
　Next, a third embodiment of the present disclosure will be described.
　In the vehicle skeleton 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, in the vehicle skeleton member 6 of the present embodiment, as shown in FIG. 5, the reinforcing member 3 is joined to the bottom surface portion 21A of the inner component 21 of the hollow member 2 by the adhesive 7. Is different. As the adhesive 7, 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 7 to have flame retardancy by adding a flame retardant or the like.
[0039]
　When manufacturing the vehicle skeleton member 6, 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 7 is poured into the hat-shaped recess of the inner component 21. Finally, the adhesive 7 is irradiated with heat, light or the like to cure the adhesive 7. After that, the vehicle skeleton member 6 is assembled by the same procedure as in the first embodiment.
[0040]
　The adhesive 7 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 vehicle skeleton member 6 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 7 into the hat-shaped recess of the inner component 21 constituting the hollow member 2, the workability is also good.
[0041]
　[4] Fourth Embodiment
　Next, a fourth embodiment of the present disclosure will be described.
　In the vehicle skeleton member 4 of the second embodiment described above, the end portion of the reinforcing member 3 on the first surface 2A side is closed by the first lid member 5.
　On the other hand, in the vehicle skeleton member 8 of the present embodiment, as shown in FIG. 6, the end portion of the second surface 2B of the reinforcing member 3 is closed by the second lid member 9. It's different.
[0042]
　The second lid member 9 is made of a rectangular steel plate and is arranged so as to straddle a plurality of reinforcing members 3. The plurality of reinforcing members 3 and the second lid member 9 are joined by welding as in the second embodiment.
　The second lid member 9 is joined to the bottom surface portion 22A of the outer component 22 constituting the hollow member 2 by welding. However, since the bottom surface portion 22A of the outer component 22 has a portion that bulges outward, welding cannot be performed at this portion. It is also possible to omit welding the second lid member 9 and the bottom surface portion 22A if the portion that bulges outward becomes large depending on the shape of the vehicle body. Further, the first lid member 5 is provided at the end of the reinforcing member 3 on the first surface 2A side as in the second embodiment, and the second lid member 9 is further provided as in the present embodiment. It may be provided.
　The second lid member 9 is preferably arranged so as to straddle the plurality of reinforcing members 3. Then, even if a thin member such as a utility pole collides with the arrangement position of the reinforcing member 3, an external force is transmitted to the plurality of reinforcing members 3 via the second lid member 9 to crush the plurality of reinforcing members 3. be able to.
[0043]
　[5] Fifth Embodiment
　Next, a fifth 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 vehicle skeleton member 12 of the present embodiment is different in that the shape of the first lid member 13 is different as shown in FIG. 7A.
[0044]
　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.
[0045]
　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.
[0046]
　Further modifications can be adopted in this embodiment. For example, as shown in FIG. 7B, the extending portion 133 may be formed at the tip of the inclined surface portion 132 of the first lid member 13 of the vehicle skeleton 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 a joint portion with the side surface portion 22B of the outer component 22 of the hollow member 2, and is joined 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 vehicle skeleton member 12B, when an external force acts on the hollow member 2, the joint portion between the extending portion 133 and the side surface portion 22B is compressed and deformed. When the joint is welded, the heat-affected zone generated by the welding is not easily destroyed, so that the joint strength of the joint portion can be improved.
[0047]
　As shown in FIG. 7C, the tip of the first lid member 13 of the vehicle skeleton 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 making the skeleton member 12C for a vehicle, the movement of the first lid member 13 is completely restrained, so that the reinforcing effect of the reinforcing member 3 is further improved.
[0048]
　[6] Sixth Embodiment
　Next, the sixth 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 vehicle skeleton member 18 of the present embodiment, as shown in FIG. 8, a plurality of cutout portions 191 are formed at the end portion of the reinforcing member 19 on the outer component 22 side. The difference is that.
[0049]
　A plurality of notches 191 are formed along the width direction of the reinforcing member 19. The shape of each notch 191 is exemplified by a rectangular shape. 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, when an external force is applied, the portion of the cutout portion 191 is crushed first, and the reinforcing member 19 is easily crushed in the axial direction. Since the portion adjacent to the portion of the reinforcing member 19 that has buckled in the axial direction is also deformed, it is easier to buckle than the portion that has not been deformed. That is, buckling can be caused in order in the axial direction by buckling the portion where the notch portion 191 is located first.
Example
[0050]
　The reinforcing effect of each of the vehicle skeleton member 1 of the first embodiment and the vehicle skeleton member 4 of the second embodiment was confirmed. Bending resistance and pressure resistance crushing performance were evaluated as resistance to external force.
[0051]
　[1] Evaluation of bending resistance performance As
　shown in FIG. 9, the vehicle skeleton member 1 (Example 1) is supported by two poles P1, and an external force by the pole P2 acts on the center of the vehicle skeleton member 1. The bending resistance performance of the vehicle skeleton member 1 was evaluated. In the vehicle skeleton member 1, five reinforcing members 3 made of a circular pipe having a diameter of 50 mm and a thickness of 1.6 mm are arranged inside the hollow member 2. The reinforcing member 3 weighed 200 g / piece.
[0052]
　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 external force 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 vehicle skeleton material 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 vehicle skeleton member (external force / member mass: kN / kg) was adopted.
[0053]
　When the bending resistance performance of Example 1 and Comparative Example was evaluated, the results shown in FIG. 10 were obtained. The horizontal axis of FIG. 10 is the stroke amount of the pole P2 (the amount of movement after the pole P2 comes into contact with the rocker member).
　In the case of the comparative example, as shown in the graph G1 of FIG. 10, the bending resistance performance of 15 kN / kg or less was obtained even at the maximum value.
[0054]
　On the other hand, in Example 1, as shown in the graph G2 of FIG. 10, 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.
[0055]
　[2] Evaluation of pressure resistance crushing performance As
　shown in FIG. 11, the vehicle skeleton members 1 and 4 are supported by the rigid wall W1, and an external force by the pole P2 is applied to the center of the vehicle skeleton members 1 and 4, and the vehicle. The pressure-resistant crushing performance of the frame members 1 and 4 was evaluated. The rigid wall is perpendicular to the direction of action of the external force.
　A crushing load of a 250 mmφ pole P2 was applied to a position (center) where the reinforcing members 3 of the vehicle skeleton members 1 and 4 were arranged.
[0056]
　Similar to the evaluation of the bending resistance performance, as a comparative example, the pressure-resistant crushing performance was also evaluated for the vehicle skeleton material in which the reinforcing member 3 is not provided inside the hollow member 2.
　As for the evaluation characteristic value, the value obtained by dividing the external force applied by the pole P2 by the masses of the vehicle skeleton members 1 and 4 (external force / member mass: kN / kg) was adopted as in the evaluation of the bending resistance performance. ..
[0057]
　When the performance of the crushing load was compared between the vehicle skeleton member 1 and the vehicle skeleton member in which the reinforcing member 3 was not arranged inside, the results shown in FIG. 12 were obtained.
　In the comparative example, as shown in the graph G3 of FIG. 12, 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. 12, 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.
[0058]
　A comparison of the pressure-resistant crushing performance of the vehicle skeleton member 1 (Example 2) and the vehicle skeleton member 4 (Example 3) provided with the first lid member 5 by the evaluation method shown in FIG. 11 is shown in FIG. The results are shown.
　Example 2 was the result of graph G5 of FIG. On the other hand, Example 3 was the result of graph G6 of FIG.
　It was confirmed that both Example 2 and Example 3 gave good results. Therefore, it was confirmed that the vehicle skeleton members 1 and 4 have the same pressure-resistant crushing performance when a load is applied from the vertical direction.
[0059]
　As shown in FIG. 14, the rigid wall W1 supporting the vehicle skeleton members 1 and 4 is tilted by 10 ° as compared with FIG. 11, and the vehicle skeleton when a crushing load is applied to the vehicle skeleton member 1 from an oblique direction. The pressure-resistant crushing performance of members 1 and 4 was evaluated.
　The load-bearing performance in the oblique direction assumes a case where the vehicle collides with a utility pole or the like from an oblique direction, and is one of the side collision test methods of the vehicle in NHTSA.
[0060]
　As shown in FIG. 11, the pressure-resistant crushing performance of the vehicle skeleton member 1 is when a crushing load is applied from a vertical direction (Example 4) and when a crushing load is applied from an oblique direction (Example 5). , The result shown in FIG.
　The result of Example 4 was shown in the graph G7 of FIG. 15, and it was confirmed that the embodiment had sufficient pressure-resistant crushing performance. However, in Example 5, the result shown in the graph G8 of FIG. 15 was obtained, and it was confirmed that although the pressure-resistant crushing performance was sufficient, the pressure-resistant crushing performance was lower than that in Example 4.
[0061]
　On the other hand, in the vehicle skeleton member 4 using the first lid member 5, the result shown in FIG. 16 was obtained. The result when a pressure-resistant crushing load in the vertical direction is applied (Example 6) is graph G9 of FIG. On the other hand, the result when a pressure-resistant crushing load in the oblique direction was applied (Example 7) was graph G10 of FIG. It was confirmed that the vehicle skeleton 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 vehicle skeleton member 4 does not change significantly due to the crushing load acting from other than the axial direction of the cylindrical body of the reinforcing member 3, and the vehicle skeleton member 4 has robustness. Means that is high.
Description of the sign
[0062]
　1 ... Vehicle skeleton member, 2 ... Hollow member, 2A ... 1st surface, 2B ... 2nd surface, 3 ... Reinforcing member, 4 ... Vehicle skeleton member, 5 ... 1st lid member, 6 ... Vehicle skeleton member, 7 ... Adhesive, 8 ... Vehicle skeleton member, 9 ... Second lid member, 12 ... Vehicle skeleton member, 12B ... Vehicle skeleton member, 12C ... Vehicle skeleton member, 13 ... First lid member, 18 ... Vehicle Skeleton member, 19 ... Reinforcing member, 21 ... Inner part, 21A ... Bottom part, 21B ... Side part, 21C ... Flange part, 22 ... Outer part, 22A ... Bottom part, 22B ... Side part, 22C ... Flange part, 131 ... bottom surface, 131B ... bent protrusion, 131C ... bent protrusion, 132 ... inclined surface part, 133 ... extending part, 134 ... flange part, 191 ... notch part, P1 ... pole, P2 ... pole, S ... support span, W1 ... Rigid wall.
The scope of the claims
[Claim 1]
　A hollow member,
　a reinforcing member
comprising a
　said hollow member is provided with a first surface and a second surface opposite to each other inside,
　the reinforcing member comprises a cylindrical body having a pseudo-circular cross-section,
　the reinforcing The member is a vehicle skeleton member standing on the first surface or the second surface inside the hollow member.
[Claim 2]
　The vehicle skeleton 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]
　The vehicle skeleton member according to claim 2, further
　comprising a joint portion between the first lid member and the hollow member.
[Claim 4]
　In the vehicle skeleton member according to claim 3, the
　joint portion is a vehicle skeleton member which is a welded portion on a side surface portion between the first surface and the second surface of the hollow member.
[Claim 5]
　In the vehicle skeleton member according to claim 4, the
　welded portion is a vehicle skeleton member located closer to the second surface than the first surface.
[Claim 6]
　The vehicle skeleton 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]
　In the vehicle skeleton member according to any one of claims 1 to 6, the vehicle skeleton member to which a
　second lid member that closes an end portion on the second surface side is joined to the reinforcing member. ..
[Claim 8]
　The vehicle skeleton member according to any one of claims 1 to 7,
　wherein the pseudo-circular cross section of the reinforcing member has a ratio of a major axis to a minor axis of 2.5 or less.
[Claim 9]
　In the vehicle skeleton member according to any one of claims 1 to 8, a
　plurality of the reinforcing members are arranged inside the hollow member, and
　the distance between the axes of the cylindrical body of each reinforcing member is set. A vehicle skeleton member having a diameter of 4 times or less the diameter of the reinforcing member.
[Claim 10]
　The vehicle skeleton member according to any one of claims 1 to 9,
　wherein the reinforcing member is a vehicle skeleton member made of a steel material.
[Claim 11]
　The vehicle skeleton member according to any one of claims 1 to 10,
　wherein the hollow member is a vehicle skeleton member made of a steel material.
[Claim 12]
　A vehicle in which the vehicle skeleton member according to any one of claims 1 to 11 has the first surface of the hollow member arranged inside the vehicle and the second surface arranged outside the vehicle.