JP5440156B2 - Vehicle frame structure - Google Patents

Description

  The present invention relates to a structure of a vehicle frame constituting a part of a vehicle body in a vehicle such as an automobile, and more specifically, for a vehicle in which a reinforcing plate is attached to the inside of a tubular frame main body to which a load can act from the outside. It relates to the frame structure.

  As is well known, a vehicle frame (body frame) such as a center pillar or side sill that constitutes a part of a vehicle body of a vehicle such as an automobile is required to have high strength and high rigidity and to improve fuel efficiency. There is a need for weight reduction. For this reason, the body frame is often configured by forming a metal plate-like material into a tubular shape.

  In addition, in a body frame such as a side sill, for example, in order to ensure the safety of an occupant when receiving a collision from the side of the vehicle body (so-called side collision), it does not bend and deform even if a load is applied from the outside during a vehicle collision. It is generally required to secure a sufficient bending resistance, and a structure in which a reinforcing plate is attached to the inside of a tubular frame body for reinforcement is known.

  For example, in Patent Document 1, a lower vertical wall extending vertically along the outer panel of the side sill, and an upper wall of the side sill are inclined inward from the upper end of the vertical wall. There is disclosed a structure in which a reinforcing plate having an upper inclined wall that rises and extends is attached, and the upper corner portion of the side sill is reinforced by being stretched by the upper inclined wall.

  Further, for example, in Patent Document 2, a reinforcing plate that forms a plurality of closed cross sections extending in the longitudinal direction of the side sill between the inner panel and the inner panel is provided near the upper corner of the inner sill. There is disclosed a structure in which the bending rigidity of a side sill is increased by a cross-sectional portion.

JP 2007-191008 A JP 2009-1113766 A

  By attaching a reinforcing plate as disclosed in Patent Document 1 and Patent Document 2 to a body frame such as a side sill, the bending resistance of the body frame can surely be increased, but the fuel efficiency of the body frame is improved. Therefore, further weight reduction is required, and it is an important issue how to efficiently increase the bending resistance while suppressing an increase in weight.

  The inventors of the present application have conducted various test studies, and as will be described in detail later, when a load is applied to the rectangular tubular frame body from the outside to bend and deform, a force in the compression direction is applied when the load is applied. The first surface portion on which the action acts begins to deform inward of the frame body along the load input direction, and the third surface portion adjacent to the first surface portion swells outward of the frame body along with this deformation. It has been found that out-of-plane deformation occurs, the second surface portion on which a tensile force acts when a load is applied is deformed inward of the frame body, and the frame body is bent and deformed to buckle.

  Based on this knowledge, if the out-of-plane deformation of the third surface portion deforming with the bending deformation of the first surface portion toward the inward side of the frame body can be suppressed, the bending deformation of the entire frame body is effectively suppressed. It is considered that the bending resistance of the frame body can be increased.

  In addition, when the frame body undergoes bending deformation due to an external load, the frame body bends and deforms with the portion starting to deform inward of the frame body along the direction in which the load acts. It is considered that by effectively reinforcing a predetermined range in the longitudinal direction of the frame body including a portion to which a load acts from the outside, it is possible to efficiently increase the bending resistance of the frame body while suppressing an increase in weight.

  However, if the reinforcing plate attached to the inside of the frame body is attached only to a predetermined range including the portion where the load acts from the outside, the frame near the end of the reinforcing plate where the rigidity changes suddenly when the load acts from the outside. It is considered that a new bending deformation occurs in the main body.

  FIG. 15 is an explanatory diagram for explaining a state in which the vehicle body frame to which the reinforcing plate is attached is bent and deformed only in a predetermined range including a portion to which a load is applied from the outside. In FIG. 15A, in order to clearly show the reinforcing plate in the frame main body, the frame main body is shown by a one-dot chain line, which is shown in a transmissive state.

  The vehicle body frame 301 shown in FIG. 15A is positioned between the upper surface portion 300a, the lower surface portion 300b, the upper surface portion 300a, and the lower surface portion 300b, and between the upper surface portion 300a and the lower surface portion 300b. The frame body 300 includes side portions 300c that form 300d and 300e, and has a rectangular closed cross-section. The reinforcing plate 320 is attached only to the side surface portion 300c of the range.

  With both ends in the longitudinal direction of the vehicle body frame 301 supported by fixing points (not shown), as shown in FIG. 15B, an indenter 302 is inserted from above into the central portion of the upper surface portion 300a of the vehicle body frame 301 in the longitudinal direction. When the load F is applied, a bending deformation starting point 303 of the frame main body 300 occurs near the end of the reinforcing plate 320, and the frame main body 300 may be bent and deformed near the end of the reinforcing plate 320.

  Therefore, according to the present invention, in the vehicle frame structure in which the reinforcing plate is attached to the inside of the tubular frame main body, it is possible to efficiently increase the bending resistance while suppressing an increase in weight, and a load acts from the outside. An object of the present invention is to provide a vehicle body frame structure that can suppress bending deformation of the frame body in the vicinity of the end portion of the reinforcing plate.

  For this reason, the vehicle body frame structure according to claim 1 of the present application is a vehicle frame structure in which a reinforcing plate is attached to the inside of a tubular frame body to which a load can be applied from the outside. A first surface portion on which a force in the compressive direction acts when a load is applied, a second surface portion on which a force in the tensile direction acts, and the first surface portion, located between the first surface portion and the second surface portion, A third surface portion that forms a corner with each of the second surface portions, and the reinforcing plate is separated from the third surface portion, and extends along the third surface portion. A plurality of the frame main body formed integrally with the base portion and arranged in a direction perpendicular to the longitudinal direction of the frame main body, protrudes from the base portion toward the third surface portion, contacts the third surface portion, and is at least partially Has a plurality of convex portions coupled to the third surface portion. It is provided in a predetermined range including a portion where the load in the longitudinal direction of the frame main body can act along the third surface portion, and at the end of the reinforcing plate in the longitudinal direction of the frame main body in the longitudinal direction of the frame main body. The reinforcing plate is attached to the frame main body so as to be lower in strength than the central portion of the reinforcing plate.

  The invention according to claim 2 of the present application is the invention according to claim 1, wherein the reinforcing plate is formed of the reinforcing plate in the longitudinal direction of the frame body at the end of the reinforcing plate in the longitudinal direction of the frame body. It is characterized by being attached to the frame body so that the coupling force with the third surface portion is smaller than that of the center portion.

  Furthermore, the invention according to claim 3 of the present application is the invention according to claim 2, wherein the reinforcing plate is formed at the end of the reinforcing plate in the longitudinal direction of the frame body. It is attached to the frame main body so that the number of couplings connecting the convex part and the third surface part is smaller than that of the central part.

  Still further, an invention according to claim 4 of the present application is the invention according to any one of claims 1 to 3, wherein the reinforcing plate is formed at the end of the reinforcing plate in the longitudinal direction of the frame body. The height of the convex portion is lower than the central portion of the reinforcing plate in the longitudinal direction of the frame main body.

  Still further, the invention according to claim 5 of the present application is the invention according to any one of claims 1 to 4, wherein the reinforcing plate is formed at the end of the reinforcing plate in the longitudinal direction of the frame body. The width of the reinforcing plate provided along the third surface portion in the direction orthogonal to the longitudinal direction of the frame body is smaller than the central portion of the reinforcing plate in the longitudinal direction of the frame body. It is what.

  Still further, the invention according to claim 6 of the present application is the invention according to any one of claims 1 to 5, wherein the reinforcing plate is a longitudinal direction of the frame body on the first surface portion side of the frame body. The length is longer than the length in the longitudinal direction of the frame body on the second surface side of the frame body, and has a constricted shape from the first surface side of the frame body toward the second surface side of the frame body. It is characterized by being formed.

  According to the vehicle body frame structure according to claim 1 of the present application, the reinforcing plate attached to the inside of the frame body includes a base portion extending along the third surface portion in a state of being separated from the third surface portion of the frame body, A plurality of protrusions arranged in a longitudinal direction of the frame body and in a direction perpendicular to the longitudinal direction, projecting from the base portion toward the third surface portion, abutting the third surface portion, and at least a part of which is coupled to the third surface portion; By forming a closed cross-section portion between the third surface portion and the base portion in the longitudinal direction of the frame main body and the direction orthogonal to the longitudinal direction, the rigidity of the third surface portion of the frame main body is increased to increase the third. It is possible to effectively suppress the surface portion from bulging outward and being deformed out of the plane, and to increase the bending resistance of the frame body. Further, the reinforcing plate is provided in a predetermined range including a portion where the load in the longitudinal direction of the frame main body can act, and the strength of the end portion of the reinforcing plate in the longitudinal direction of the frame main body is lower than that of the central portion. By being attached to the frame body, only the parts where bending deformation is likely to occur can be reinforced to effectively increase the bending resistance while suppressing an increase in weight, and to reinforce when a load acts from the outside. It is possible to suppress bending deformation of the frame body in the vicinity of the end portion of the plate.

  Further, according to the invention of claim 2 of the present application, the reinforcing plate has a frame main body so that the binding force with the third surface portion is smaller than the central portion at the end of the reinforcing plate in the longitudinal direction of the frame main body. By being attached to, the reinforcement effect by a reinforcement board can be made small in the edge part of a reinforcement board, and it can suppress effectively that a frame main body bends and deforms in the edge part vicinity of a reinforcement board.

  Further, according to the invention of claim 3 of the present application, the reinforcing plate has a smaller number of couplings connecting the convex portion and the third surface portion at the end portion of the reinforcing plate in the longitudinal direction of the frame body than at the center portion thereof. By being attached to the frame main body as described above, the effect can be more specifically realized by a relatively simple structure.

  Furthermore, according to the invention of claim 4 of the present application, the reinforcing plate is formed such that the height of the convex portion is lower than the central portion at the end portion of the reinforcing plate in the longitudinal direction of the frame body. The reinforcing effect of the reinforcing plate at the end of the reinforcing plate can be reduced, and the bending of the frame body near the end of the reinforcing plate can be effectively suppressed.

  Still further, according to the invention according to claim 5 of the present application, the reinforcing plate is a third surface portion in a direction orthogonal to the longitudinal direction of the frame body as compared with the central portion at the end portion of the reinforcing plate in the longitudinal direction of the frame body. Since the reinforcing plate provided along the width of the reinforcing plate is formed with a small width, the reinforcing effect of the reinforcing plate can be reduced at the end of the reinforcing plate, and the frame body bends and deforms near the end of the reinforcing plate. Can be effectively suppressed.

  Furthermore, according to the invention of claim 6 of the present application, the reinforcing plate has a longitudinal length of the frame body on the first surface portion side of the frame body, and a longitudinal length of the frame body on the second surface portion side of the frame body. The inner side of the frame main body that may be formed at the initial stage of bending deformation of the frame main body because it is formed in a narrow shape downward from the first surface side of the frame main body toward the second surface side of the frame main body. The bending deformation of the first surface portion toward the side can be effectively suppressed, and the above-described effect can be more effectively achieved.

1 is a perspective view showing a vehicle body frame to which a vehicle frame structure according to a first embodiment of the present invention is applied. It is a principal part enlarged view of the vehicle body frame shown in FIG. FIG. 3 is a cross-sectional view of the vehicle body frame taken along line Y3-Y3 in FIG. FIG. 3 is a cross-sectional view of the vehicle body frame taken along line Y4-Y4 in FIG. It is explanatory drawing for demonstrating the arrangement | sequence of the convex part of a reinforcement board. It is explanatory drawing for demonstrating the structure comprised by the frame main body and the reinforcement board. It is a perspective view which shows the principal part of the vehicle body frame to which the vehicle frame structure which concerns on the 2nd Embodiment of this invention is applied. It is a perspective view which shows the principal part of the vehicle body frame to which the vehicle frame structure which concerns on the 3rd Embodiment of this invention is applied. It is a perspective view which shows the principal part of the vehicle body frame to which the frame structure for vehicles which concerns on the 4th Embodiment of this invention is applied. It is a perspective view which shows the principal part of the vehicle body frame to which the vehicle frame structure which concerns on the 5th Embodiment of this invention is applied. It is explanatory drawing for demonstrating the simulation for analyzing the bending deformation behavior of a vehicle body frame. It is a perspective view which shows the result of having analyzed the bending deformation behavior of the vehicle body frame by simulation. It is sectional drawing which shows the cross section of the bending part of the vehicle body frame in FIG. It is a graph which shows the relationship between the downward stroke of the indenter which loads a vehicle body frame, and the reaction force with respect to this load, and the relationship between the downward stroke of an indenter, and energy absorption amount. It is explanatory drawing for demonstrating the state which the vehicle body frame which attached the reinforcement board only to the predetermined range including the part to which a load acts from the outside bends.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. In the following description, terms that mean a specific direction such as “up”, “down”, “right”, “left” and other terms including those terms are used. In order to facilitate understanding of the referenced invention, the technical scope of the present invention is not limited by the meaning of these terms.

  The inventors of the present application can efficiently increase bending resistance while suppressing an increase in weight in a vehicle frame structure in which a reinforcing plate is attached inside a tubular frame body, and a load acts from the outside. In developing a vehicle frame structure that can suppress bending deformation of the frame body in the vicinity of the end portion of the reinforcing plate sometimes, first, the bending of the vehicle body frame is performed by inputting a bending load from the outside to the tubular vehicle body frame. For the deformation behavior at the time, a simulation analysis by CAE (Computer Aided Engineering) was performed.

FIG. 11 is an explanatory diagram for explaining a simulation for analyzing the bending deformation behavior of the tubular body frame. FIG. 11A shows a model used for analyzing the bending deformation behavior of the body frame. FIG. 11B is a diagram showing a state in which a load is applied to the vehicle body frame and the vehicle body frame is bent, and FIG. 12 is a perspective view showing a result of simulation analysis of the bending deformation behavior of the vehicle body frame. FIG. 13 is a cross-sectional view showing a cross section of a bent portion of the vehicle body frame in FIG. 12. In FIG. 12, the amount of deformation of each part of the body frame is represented by shades of color, and the larger the amount of deformation, the darker the color. 12 and 13 show the progress of bending deformation of the body frame in the order of (a), (b), (c), and (d), and the descending stroke of the indenter shown in FIG. The cases of S ₀ , S ₁ , S ₂ and S ₃ are shown in order.

  In this simulation, as shown in FIGS. 12 and 13, as a tubular body frame, an upper surface portion 200a, a lower surface portion 200b provided in parallel with the upper surface portion 200a in a state of being separated from the upper surface portion 200a, and an upper surface portion 200a The side surface portions 200c on both sides adjacent to the lower surface portion 200b and positioned between the upper surface portion 200a and the lower surface portion 200b, that is, the right end portion of the upper surface portion 200a and the right end portion of the lower surface portion 200b in FIGS. A tubular frame body 200 having a right side surface portion 200c positioned between them and a left side surface portion 200c positioned between a left end portion of the upper surface portion 200a and a left end portion of the lower surface portion 200b, and having a substantially rectangular closed cross section. As a model, a bending load is applied to this body frame from outside to simulate the deformation behavior when the body frame is bent and deformed It was analyzed.

  Specifically, as shown in FIG. 11A, a frame body 200 having a predetermined length X1 is supported by two fixing points 201 separated by a predetermined distance X2 shorter than the length X1, and two frames 200 are supported. The indenter 202 is lowered at a constant speed from above to the central portion P1 in the longitudinal direction of the upper surface portion 200a of the frame body 200 corresponding to the intermediate position of the fixed point 201, and is acted from the outside via the indenter 202 at the time of a vehicle collision. A load F simulating the load was applied to the frame body 200, and the bending deformation behavior of the body frame was examined.

  When the bending load F is applied to the vehicle body frame from the outside in this way, the frame body 200 is bent and deformed in a convex shape downward as shown in FIG. In the portion 200a, a compressive stress is applied from both ends in the longitudinal direction to generate compressive stress, and in the lower surface portion 200b, a tensile force is applied from both ends in the longitudinal direction to generate tensile stress. Further, in the side surface portion 200c, compressive stress is generated on the upper surface portion 200a side from the neutral shaft 210, and tensile stress is generated on the lower surface portion 200b side from the neutral shaft 210.

  FIG. 14 is a graph showing the relationship between the descending stroke of the indenter that applies a load to the vehicle body frame and the reaction force against the load, and the relationship between the descending stroke of the indenter and the amount of energy absorption. In FIG. The descending stroke of the indenter 202 descending with bending deformation of the frame main body 200 from the position in contact with the upper surface portion 200a of the frame main body 200 is shown on the horizontal axis, the reaction force F ′ against the load F is displayed on the left vertical axis, and the energy absorption amount EA Is shown on the right vertical axis. The energy absorption amount EA is energy that can be absorbed when the frame body 200 is bent and deformed, and is represented by the product of the reaction force F ′ with respect to the load F and the downward stroke of the indenter 202.

  The bending deformation behavior of the vehicle body frame by simulation analysis will be described with reference to FIGS.

As shown in (a) of FIG. 12 and FIG. 13, the indenter 202 is lowered from above the frame body 200, when downward stroke of the indenter indenter 202 is positioned in contact with the upper surface portion 200a is _{S 0,} the frame body 200, the vertex P2 of the corner portion 200d formed between the upper surface portion 200a and the side surface portion 200c is substantially above the vertex P3 of the corner portion 200e formed between the lower surface portion 200b and the side surface portion 200c. Located on the side. Note that these vertices P2 and P3 represent the vertices of the corners 200d and 200e in the cross section having the center portion P1 when the frame body 200 is bent and deformed.

  When the indenter 202 is moved downward from this state and a load F is applied to the frame main body 200, the reaction force F ′ against the load F increases as the descending stroke of the indenter 202 increases as shown in FIG. The frame body 200 is deformed by being curved downwardly, and the frame main body 200 is subjected to a compression direction force on the upper surface portion 200a, a tensile force on the lower surface portion 200b, and a center to which a load F is applied. The portion P1 is bent and deformed.

Then, the reaction force F 'is maximized with respect to the load F when downward stroke of the indenter 202 is S _1, as shown in (b) of FIG. 12 and FIG. 13, the frame body 200 is curved in a convex shape on the lower side And is deformed inwardly of the tubular frame body 200, and along with this deformation, the side surface portion 200c adjacent to the upper surface portion 200a swells outward in the cross-sectional direction to cause out-of-plane deformation. The vertex P2 of the corner portion 200d is inclined outward from the substantially vertical direction with respect to the vertex P3 of 200e, and a portion having a large deformation amount is generated in the corner portion 200d as indicated by a deformation portion α in FIG. Further, as shown in FIG. 13B, the lower surface portion 200 b is displaced inward of the frame main body 200 with this deformation. Note that the maximum load F′max that maximizes the reaction force F ′ with respect to the load F represents the degree of bending resistance.

  When the descending stroke of the indenter 202 is further increased, as shown in FIG. 14, the reaction force F ′ with respect to the load F is decreased along with the descending stroke of the indenter 202, and as shown in (c) and (d) of FIGS. As shown, the frame body 200 is further bent and deformed, the upper surface portion 200a is further deformed inwardly of the frame body 200, and along with this deformation, the side surface portion 200c is orthogonal to the longitudinal direction of the frame body 200. Further, the lower surface portion 200d is further displaced toward the inner side of the frame body 200, and the frame body 200 is bent and deformed and buckled.

  From this simulation analysis result, the inventors of the present application, when the bending load is applied to the tubular frame body from the outside, the first surface portion (upper surface portion) on which the force in the compression direction acts when the bending load is applied. Begins to deform inward of the frame main body along the input direction of the load, and the third surface portion (side surface portion) adjacent to the first surface portion swells outward from the frame main body along with the deformation. It has been found that the second surface part (lower surface part) on which a force in the tensile direction acts when a load is applied is deformed and the frame body is bent and deformed to buckle.

  In addition to the simulation analysis described above, the inventors of the present application similarly examine the deformation behavior when an actual vehicle body frame formed in a rectangular tube is bent and deformed by applying a bending load to the vehicle body frame from the outside. Although an experiment was conducted, in this experiment as well, results similar to the simulation analysis results described above were obtained.

  Therefore, based on these simulation analysis results and experimental results, if the out-of-plane deformation of the third surface portion deforming with the bending deformation of the first surface portion toward the inner side of the tubular frame body can be suppressed, the frame body It is considered that the entire bending deformation can be effectively suppressed and the bending resistance of the frame body can be increased.

  In addition, when the frame body undergoes bending deformation due to an external load, the frame body is bent and deformed with the portion starting to be deformed inward of the frame body along the direction in which the load acts. Therefore, by effectively reinforcing a predetermined range in the longitudinal direction of the frame body including a portion to which a load acts from the outside, it is possible to efficiently increase the bending resistance of the vehicle body frame while suppressing an increase in weight. Conceivable.

Below, the frame structure for vehicles which concerns on embodiment of this invention is demonstrated.
FIG. 1 is a perspective view showing a vehicle body frame to which the vehicle frame structure according to the first embodiment of the present invention is applied, FIG. 2 is an enlarged view of a main part of the vehicle body frame shown in FIG. 1, and FIG. 4 is a cross-sectional view of the vehicle body frame taken along line Y3-Y3 in FIG. 4, and FIG. 4 is a cross-sectional view of the vehicle body frame taken along line Y4-Y4 in FIG. In FIGS. 1 and 2 and FIGS. 7 to 10 to be described later, in order to clearly show the reinforcing plate in the frame body, the frame body is shown by a one-dot chain line, and is shown in a transparent state.

  As shown in FIGS. 1 to 4, a vehicle body frame 1 to which the vehicle frame structure according to the first embodiment of the present invention is applied includes a tubular frame body 10 formed in a substantially rectangular closed cross section, and a frame body 10. And a reinforcing plate 20 for reinforcing the frame body 10 attached to the inside of the frame body 10 along the longitudinal direction.

  The frame body 10 includes a first plate member 11 obtained by pressing a metal plate material such as a steel plate into a cross-sectional hat shape, and a second plate shape made of a metal plate material such as a steel plate. The first plate-like member 11 includes a bottom surface portion 11a formed in a substantially planar shape, side surface portions 11b extending from the bottom surface portion 11a on both sides of the bottom surface portion 11a, and a side surface. The second plate member 12 includes a flat portion 12a formed in a substantially planar shape. The flange portion 11c extends outward from the portion 11b in a substantially right angle direction.

  In the frame main body 10, the first plate-like member 11 and the second plate-like member 12 overlap the flange portion 11 c of the first plate-like member 11 with the flat portion 12 a of the second plate-like member 12. They are joined by spot welding to form a substantially rectangular closed cross section. Thereby, in the frame main body 10, a corner portion 10 a that is substantially perpendicular to the bottom surface portion 11 a and the side surface portion 11 b of the first plate member 11 is formed, and the side surface portion 11 b of the first plate member 11 is A corner portion 10 b that is substantially perpendicular to the flat portion 12 a of the second plate member 12 is formed.

  The reinforcing plate 20 attached to the inside of the frame body 10 is also obtained by pressing a metal plate-like material such as a steel plate, and the side portions on both sides of the first plate-like member 11 of the frame body 10. 11b, and extends from the upper corner 10a of the frame body 10 to the lower corner 10b in a direction orthogonal to the longitudinal direction of the frame body 10 (orthogonal cross-sectional direction). It arrange | positions so that the inner peripheral side of the side part 11b of the plate-shaped member 11 may be covered.

  Each reinforcing plate 20 has a predetermined range including a portion in which a load in the longitudinal direction of the frame body 10 is supposed to act. In this embodiment, the frame is assumed to act on the central portion in the longitudinal direction of the frame body 10. The main body 10 is provided on the center side in the longitudinal direction so as to have a half length of the frame main body 10, and extends along the side surface portion 11 b while being separated from the side surface portion 11 b of the first plate-like member 11 of the frame main body 10. And a plurality of convex portions 22 that are formed integrally with the base portion 21 and project from the base portion 21 toward the side surface portion 11b and are formed in a truncated pyramid shape.

  FIG. 5 is an explanatory diagram for explaining the arrangement of the convex portions of the reinforcing plate, and is a front view showing a main portion of the reinforcing plate. As shown in FIG. 5, the plurality of convex portions 22 are formed in a quadrangular frustum shape in which the top surface portion 22 a of the convex portion 22 is a quadrangle, and are periodically arranged in the longitudinal direction and the orthogonal cross-sectional direction of the frame body 10. ing.

  In the present embodiment, each of the plurality of convex portions 22 is arranged such that the quadrangular diagonal of the top surface portion 22a is parallel to the longitudinal direction of the frame body 10 and the direction orthogonal to the longitudinal direction. Adjacent protrusions 22 overlap with each other in the orthogonal cross-sectional direction of the frame body 10 and L1 overlaps with each other in the orthogonal cross-sectional direction of the frame body 10 and overlap with each other in the longitudinal direction of the frame body 10. . As shown in FIG. 5, for the convex portion denoted by reference numeral 22, the convex portion 22A adjacent to the convex portion 22 in the longitudinal direction of the frame main body 10 has an overlap L1 in the orthogonal cross-sectional direction of the frame main body 10 and Convex portions 22B adjacent to each other in the cross-sectional direction of the main body 10 overlap with each other in the longitudinal direction of the frame main body 10 and have an L2.

  In this way, the plurality of convex portions 22 are arranged in the longitudinal direction of the frame body 10 and in the orthogonal cross-sectional direction of the frame body 10, and the reinforcing plate 22 is arranged in the frame as shown in FIGS. 1 and 2. The base 21 that is linearly continuous in the longitudinal direction and the orthogonal cross-sectional direction of the main body 10 is not formed.

  Further, as shown in FIG. 4, the plurality of convex portions 22 has a height H of the convex portion 22 from the base portion 21 in the longitudinal direction of the frame body 10 from the central portion of the reinforcing plate 20 in the longitudinal direction of the frame body 10. The lower end of the reinforcing plate 20 is formed so as to approach the end of the reinforcing plate, and the protruding portion 22 from the base 21 is formed at the end of the reinforcing plate 20 in the longitudinal direction of the frame main body 10 as compared with the central portion of the reinforcing plate 20 in the longitudinal direction of the frame main body 10. The height H is formed low.

  In the present embodiment, all of the plurality of convex portions 22 are adhesively bonded by abutting the top surface portion 22a with the side surface portion 11b of the first plate-like member 11 of the frame body 10 via an adhesive (not shown). 20 is attached to the frame body 10. The convex portion 22 of the reinforcing plate 20 is formed in a quadrangular truncated pyramid shape with the top surface portion 22a contacting the side surface portion 11b having a quadrangular shape, so that the convex portion 22 of the reinforcing plate 20 can be reliably applied to the side surface portion 11b. It can be combined with contact.

  The height H of the convex portion 22 from the base portion 21 is formed so as to decrease from the center portion of the reinforcing plate 20 in the longitudinal direction of the frame body 10 toward the end portion of the reinforcing plate in the longitudinal direction of the frame body 10. The distance between the base portion 21 and the side surface portion 11 b decreases as the base portion 21 approaches the end portion of the reinforcing plate in the longitudinal direction of the frame body 10 from the central portion of the reinforcing plate 20 in the longitudinal direction of the frame body 10.

  The reinforcing plate 20 is formed with flat flange portions 23 and 24 at both ends of the frame main body 10 in the orthogonal cross-sectional direction, and the flange portions 23 are formed on the first plate-like member 11 of the frame main body 10. The flange portion 24 is attached to and attached to the bottom surface portion 11a along the bottom surface portion 11a by an adhesive (not shown), and the flange portion 24 is connected to the flange portion 11c of the first plate member 11 of the frame body 10 and the second plate shape. It is attached by spot welding while being sandwiched between the flat portion 12a of the member 12. Thereby, it can prevent that the reinforcement board 20 remove | deviates from the frame main body 10 when a load acts from the outside.

  The vehicle body frame 1 configured as described above is arranged so that the bottom surface portion 11a of the first plate-like member 11 faces in a direction in which a load is supposed to act, and the reinforcing plate 20 is a frame main body. It arrange | positions so that the part in which the load in the longitudinal direction of 10 is assumed to act may be included. Thereby, when a load acts from the outside, a force in the compression direction acts on the bottom surface portion 11 a of the first plate member 11 to generate a compressive stress, and a tensile direction occurs on the flat surface portion 12 a of the second plate member 12. As a result, the tensile stress is generated.

  Thus, in the vehicle frame structure according to the first embodiment of the present invention, the reinforcing plate 20 attached to the inside of the frame main body 10 extends along the side surface portion 11b in a state of being separated from the side surface portion 11b of the frame main body 10. A plurality of base portions 21 extending in the direction perpendicular to the longitudinal direction of the frame body 10 and the longitudinal direction of the frame body 10, projecting from the base portion 21 toward the side surface portion 11 b and coming into contact with the side surface portion 11 b, and being coupled to the side surface portion 11 b. And a plurality of convex portions 22. As a result, a closed cross-section is formed between the side surface portion 11b and the base portion 21 in the longitudinal direction of the frame body 10 and the direction orthogonal to the longitudinal direction, and the rigidity of the side surface portion 11b of the frame body 10 is increased, so that the side surface portion 11b It is possible to effectively suppress the outward expansion and deformation outside the surface, and the bending resistance of the frame body 10 can be increased.

  FIG. 6 is an explanatory view for explaining a structure constituted by a frame main body and a reinforcing plate, and shows a cross-sectional view of a main part of a vehicle body frame in which a reinforcing plate is attached inside the frame main body shown in FIG. ing. As shown in FIG. 6, a plurality of frames are provided between the frame body 10 and the reinforcing plate 20 by the frame body 10 and the reinforcing plate 20 attached to the side surface portion 11 b of the first plate-like member 11 of the frame body 10. A structure 25 having a closed cross section 25a is formed.

  In the structure 25, as shown in FIG. 6, the frame body 10 and the reinforcing plate 20 are arranged apart from the bending neutral shaft 26. Has an enhanced structure. 6 illustrates the cross section in the longitudinal direction of the frame main body 10. Similarly, in the orthogonal cross sectional direction of the frame main body 10, a plurality of closed cross sections are provided between the frame main body 10 and the reinforcing plate 20. The frame body 10 has a structure in which the second moment of section is increased.

  When a load is applied to the body frame 1 from the outside to bend and deform, the side surface portion 11b of the first plate-like member 11 of the frame body 10 swells outward from the body frame 1 to cause out-of-plane deformation. 6, the bending deformation as shown in FIG. 6 occurs in the longitudinal direction and the orthogonal cross-sectional direction of the frame main body 10, but the rigidity of the side surface portion 11b of the frame main body 10 is increased by the structure 25 having the closed cross-sectional portion 25a. It is possible to effectively prevent the side surface portion 11b from bulging outward and being deformed out of the plane, and the bending resistance of the frame body 10 can be increased.

  In addition, the reinforcing plate 20 is provided in a predetermined range including a portion where a load in the longitudinal direction of the frame body 10 can act, and from the base portion 21 at the end portion of the reinforcing plate 20 in the longitudinal direction of the frame body as compared with the central portion. The height of the convex portion 22 is reduced and the weight is increased by reinforcing only the portion where bending deformation easily occurs by attaching to the frame body 10 so that the reinforcing strength by the reinforcing plate 20 is reduced. It is possible to efficiently increase the bending resistance while suppressing the bending of the frame body 10 in the vicinity of the end of the reinforcing plate 20 when a load is applied from the outside.

  Further, the reinforcing plate 20 is formed at the end portion of the reinforcing plate 20 at the end portion of the reinforcing plate 20 by the height H of the convex portion 22 being lower than the central portion at the end portion of the reinforcing plate 20 in the longitudinal direction of the frame body 10. The reinforcing effect by the reinforcing plate 20 can be reduced, and the bending of the frame body 10 near the end of the reinforcing plate 20 can be effectively suppressed.

  In addition, the reinforcing plate 20 has a plurality of convex portions 22 attached to the frame main body 10, so that a virtual region 25 b (in FIG. 5) partitioned by a line connecting the joint portions of the convex portions 22 and the frame main body 10. A plurality of hatched regions) are formed. When the body frame 1 is subjected to a load from the outside and is bent and deformed, the load can be received at each coupling portion of the virtual region 25b composed of the frame body 10 and the reinforcing plate 20, and the side surface portion 11b of the frame body 10 can be received. The out-of-plane deformation can be more effectively suppressed.

  Further, the convex portion 22 of the reinforcing plate 20 has a convex portion 22 adjacent to the longitudinal direction of the frame main body 10 and the convex portion 22 adjacent to the orthogonal cross sectional direction of the frame main body 10 while the convex portion 22 adjacent to the longitudinal direction of the frame main body 10 has an overlap L1. Since the portions 22 are formed so as to have an overlap L2 in the longitudinal direction of the frame main body 10, the base portion 21 that is linearly continuous in the longitudinal direction and the orthogonal cross-sectional direction of the frame main body 10 is not formed. Even in the case where the frame body 10 is bent and deformed, it is possible to prevent the folds due to the base portion 21 of the reinforcing plate 20 from being formed in the longitudinal direction and the orthogonal cross-sectional direction of the frame body 10 to promote the out-of-plane deformation of the side surface portion 11b. Can do.

  FIG. 7 is a perspective view showing a main part of a vehicle body frame to which the vehicle frame structure according to the second embodiment of the present invention is applied. Since the second embodiment is different from the first embodiment only in the shape of the reinforcing plate, the same reference numerals are given to those having the same configuration as the first embodiment and having the same function. A description thereof will be omitted.

  As shown in FIG. 7, the vehicle body frame 31 to which the vehicle frame structure according to the second embodiment of the present invention is applied is similar to the vehicle body frame 31 according to the first embodiment in the longitudinal direction of the frame body 10. The reinforcing plate 40 is provided in a predetermined range including a portion where a load is assumed to act.

  Each reinforcing plate 40 is separated from the side surface portion 11b and extends along the side surface portion 11b. The reinforcing plate 40 is formed integrally with the base portion 41 in the longitudinal direction of the frame body 10 and in a direction perpendicular to the longitudinal direction. A plurality of convex portions 42 that are arranged and project from the base portion 41 toward the side surface portion 11b and come into contact with the side surface portion 11b, and the plurality of convex portions 42 have a quadrangular frustum shape in which the top surface portion 42a is a quadrangle. Although formed, the end of the reinforcing plate 40 in the longitudinal direction of the frame body 10 is formed with a smaller number of convex portions 42 than the central portion thereof.

  Also in the reinforcing plate 40, the convex portions 42 are all brought into contact with the side surface portion 11b via an adhesive (not shown), and are adhesively bonded to the side surface portion 11b by the adhesive material. Since the number of convex portions 42 is smaller at the end portion of 40 than the central portion, the number of couplings connecting the convex portions 42 and the side surface portions 11b is small, and the coupling force with the side surface portions 11b is small. It is attached to the frame body 10 as described above. In this way, the reinforcing plate 40 is attached at the end portion of the reinforcing plate 40 in the longitudinal direction of the frame body 10 so that the reinforcing strength by the reinforcing plate 40 is lower than the central portion.

  Further, in the vehicle body frame 31, the height of the convex portion 42 from the base portion 41 is formed at a constant height in the longitudinal direction of the frame body 10, and the convex portion 42 is in contact with the side surface portion 11b. Is provided at a constant distance from the side surface portion 11 b in the longitudinal direction of the frame body 10. In the reinforcing plate 40 as well, planar flange portions 23 and 24 are formed at both ends of the frame main body 10 in the orthogonal cross-sectional direction.

  Also in the vehicle body frame 31 configured in this way, a closed cross section is formed between the side surface portion 11b and the base portion 41 in the longitudinal direction of the frame body 10 and the direction orthogonal to the longitudinal direction, and the side surface portion 11b of the frame body 10 is formed. It is possible to effectively prevent the side surface portion 11b from bulging outward and being deformed out of the plane, and the bending resistance of the frame body 10 can be increased.

  The reinforcing plate 40 is provided in a predetermined range including a portion where the load in the longitudinal direction of the frame main body 10 can act, and the strength at the end of the reinforcing plate 40 in the longitudinal direction of the frame main body 10 is higher than that of the central portion. By being attached to the frame body 10 so as to be low, only the portion where bending deformation is likely to occur is reinforced, so that the bending drag can be efficiently increased while suppressing an increase in weight, and the load from the outside It is possible to suppress bending deformation of the frame body 10 in the vicinity of the end portion of the reinforcing plate 40 when.

  The reinforcing plate 40 is formed such that the number of convex portions 42 is smaller at the end of the reinforcing plate 40 in the longitudinal direction of the frame main body 10 than the central portion, and the coupling force with the side surface portion 11b is reduced. By being attached to, the reinforcement effect by the reinforcement board 40 can be made small in the edge part of the reinforcement board 40, and it suppresses that the flame | frame main body 10 carries out bending deformation in the edge part vicinity of the reinforcement board 40 effectively. Can do.

  Further, the reinforcing plate 40 has a smaller number of closed cross-sectional portions formed between the side surface portion 11b and the base portion 41 at the end portion of the reinforcing plate 40 in the longitudinal direction of the frame body 10 than the central portion thereof, and the reinforcing plate The reinforcement effect by 40 can be made small and the said effect can be suppressed further effectively.

  FIG. 8 is a perspective view showing a main part of a vehicle body frame to which a vehicle frame structure according to a third embodiment of the present invention is applied. Since the third embodiment is different from the first embodiment only in the shape of the reinforcing plate, the same reference numerals are given to those having the same configuration as the first embodiment and having the same function. A description thereof will be omitted.

  As shown in FIG. 8, the vehicle body frame 51 to which the vehicle frame structure according to the third embodiment of the present invention is applied is similar to the vehicle body frame 31 according to the first embodiment in the longitudinal direction of the frame body 10. The reinforcing plate 60 is provided in a predetermined range including a portion where a load is assumed to act.

  Each reinforcing plate 60 is separated from the side surface portion 11b and extends along the side surface portion 11b. The reinforcing plate 60 is integrally formed with the base portion 61 and extends in a direction perpendicular to the longitudinal direction and the longitudinal direction of the frame body 10. A plurality of convex portions 62 that are arranged and protrude from the base portion 61 toward the side surface portion 11b and come into contact with the side surface portion 11b. The plurality of convex portions 62 are in the shape of a quadrangular frustum having a quadrangular top surface portion 62a. Although formed, the width of the reinforcing plate 60 provided along the side surface portion 11b in the direction perpendicular to the longitudinal direction of the frame main body 10 at the end of the reinforcing plate 60 in the longitudinal direction of the frame main body 10 as compared to the central portion thereof. Is formed small.

  The reinforcing plate 60 has a length in the longitudinal direction of the frame body 10 on the flat surface portion 12a side of the second plate member 12 of the frame body 10 such that the frame on the bottom surface portion 11a side of the first plate member 11 of the frame body 10 is. It is formed longer than the length of the main body 10 in the longitudinal direction, and is formed in an upwardly tapered shape from the flat surface portion 12a side toward the bottom surface portion 11a side.

  Also in the reinforcing plate 60, all the convex portions 62 are brought into contact with the side surface portion 11b via an adhesive (not shown), and are adhesively bonded to the side surface portion 11b by the adhesive material. Since the number of convex portions 62 is smaller at the end portion of 60 than the central portion, the number of couplings connecting the convex portions 62 and the side surface portions 11b is small, and the coupling force with the side surface portions 11b is small. It is attached to the frame body 10 as described above. In this way, the reinforcing plate 60 is attached at the end of the reinforcing plate 60 in the longitudinal direction of the frame body 10 so that the reinforcing strength by the reinforcing plate 60 is lower than the central portion.

  Further, in the vehicle body frame 51, the height of the convex portion 62 from the base portion 61 is formed at a constant height in the longitudinal direction of the frame body 10, and the convex portion 62 is in contact with the side surface portion 11b. Is provided at a constant distance from the side surface portion 11 b in the longitudinal direction of the frame body 10. In the reinforcing plate 60 as well, planar flange portions 23 and 24 are formed at both ends of the frame main body 10 in the orthogonal cross-sectional direction.

  Also in the vehicle body frame 51 configured as described above, a closed cross section is formed between the side surface portion 11b and the base portion 61 in the longitudinal direction of the frame body 10 and the direction orthogonal to the longitudinal direction, and the side surface portion 11b of the frame body 10 is formed. It is possible to effectively prevent the side surface portion 11b from bulging outward and being deformed out of the plane, and the bending resistance of the frame body 10 can be increased.

  Further, the reinforcing plate 60 is provided in a predetermined range including a portion where a load in the longitudinal direction of the frame body 10 can act, and the strength at the end of the reinforcing plate 60 in the longitudinal direction of the frame body 10 is higher than that of the central portion. By being attached to the frame body 10 so as to be low, only the portion where bending deformation is likely to occur is reinforced, so that the bending drag can be efficiently increased while suppressing an increase in weight, and the load from the outside It is possible to suppress bending deformation of the frame body 10 in the vicinity of the end portion of the reinforcing plate 60 when is applied.

  In the vehicle body frame 51, the reinforcing plate 60 is provided at the end of the reinforcing plate 60 in the longitudinal direction of the frame main body 10 along the side surface portion 11 b in the direction orthogonal to the longitudinal direction of the frame main body 10 as compared with the central portion. Since the width of the plate 60 is small, the reinforcing effect of the reinforcing plate 60 can be reduced at the end of the reinforcing plate 60, and the frame body 10 is bent and deformed near the end of the reinforcing plate 60. It can be effectively suppressed.

  The reinforcing plate 60 is formed such that the number of convex portions 62 is smaller at the end of the reinforcing plate 60 in the longitudinal direction of the frame main body 10 than the central portion thereof, and the coupling force with the side surface portion 11b is reduced. As a result, the reinforcing effect of the reinforcing plate 60 can be reduced at the end of the reinforcing plate 60, and the frame body 10 can be effectively prevented from being bent and deformed in the vicinity of the end of the reinforcing plate 60. Can do.

  Further, the number of closed cross-section portions formed between the side surface portion 11b and the base portion 61 is smaller at the end portion of the reinforcing plate 60 in the longitudinal direction of the frame body 10 than the central portion thereof, and the reinforcing effect by the reinforcing plate 60 is reduced. And the effect can be more effectively suppressed.

  FIG. 9 is a perspective view showing a main part of a vehicle body frame to which a vehicle frame structure according to a fourth embodiment of the present invention is applied. Since the fourth embodiment is different from the first embodiment only in the shape of the reinforcing plate, the same reference numerals are given to those having the same configuration as the first embodiment and having the same function. A description thereof will be omitted.

  As shown in FIG. 9, the vehicle body frame 71 to which the vehicle frame structure according to the fourth embodiment of the present invention is applied is similar to the vehicle body frame 31 according to the first embodiment in the longitudinal direction of the frame body 10. The reinforcing plate 80 is provided in a predetermined range including a portion where a load is assumed to act.

  Each reinforcing plate 80 is separated from the side surface portion 11b and extends along the side surface portion 11b. The reinforcing plate 80 is formed integrally with the base portion 81 in the longitudinal direction of the frame body 10 and in a direction perpendicular to the longitudinal direction. A plurality of protrusions 82 are arranged and protrude from the base portion 81 toward the side surface portion 11b so as to come into contact with the side surface portion 11b. Although formed, the width of the reinforcing plate 80 provided along the side surface portion 11b in the direction perpendicular to the longitudinal direction of the frame main body 10 at the end of the reinforcing plate 80 in the longitudinal direction of the frame main body 10 as compared to the center portion thereof. Is formed small.

  The reinforcing plate 80 has a longitudinal length of the frame main body 10 on the bottom surface portion 11a side of the first plate-like member 11 of the frame main body 10 such that the frame on the flat surface portion 12a side of the second plate-like member 12 of the frame main body 10 is. It is formed longer than the length of the main body 10 in the longitudinal direction, and is formed in a constricted shape downward from the bottom surface portion 11a side toward the flat surface portion 12a side.

  Also in the reinforcing plate 80, all the convex portions 82 are brought into contact with the side surface portion 11b via an adhesive (not shown), and are adhesively bonded to the side surface portion 11b by the adhesive material. Since the number of convex portions 82 is smaller at the end portion of 80 than the central portion, the number of couplings connecting the convex portions 82 and the side surface portions 11b is small, and the coupling force with the side surface portions 11b is small. It is attached to the frame body 10 as described above. In this way, the reinforcing plate 80 is attached at the end of the reinforcing plate 80 in the longitudinal direction of the frame body 10 so that the reinforcing strength by the reinforcing plate 80 is lower than that at the center.

  Further, in the vehicle body frame 71, the height of the convex portion 82 from the base portion 81 is formed at a constant height in the longitudinal direction of the frame body 10, and the convex portion 82 is in contact with the side surface portion 11b. Is provided at a constant distance from the side surface portion 11 b in the longitudinal direction of the frame body 10. In the reinforcing plate 80 as well, planar flange portions 23 and 24 are formed at both ends of the frame main body 10 in the orthogonal cross-sectional direction.

  Also in the vehicle body frame 71 configured in this way, a closed cross section is formed between the side surface portion 11b and the base portion 81 in the longitudinal direction of the frame body 10 and the direction orthogonal to the longitudinal direction, and the side surface portion 11b of the frame body 10 is formed. It is possible to effectively prevent the side surface portion 11b from bulging outward and being deformed out of the plane, and the bending resistance of the frame body 10 can be increased.

  Further, the reinforcing plate 80 is provided in a predetermined range including a portion where a load in the longitudinal direction of the frame body 10 can act, and the strength at the end of the reinforcing plate 80 in the longitudinal direction of the frame body 10 is higher than that of the central portion. By being attached to the frame body 10 so as to be low, only the portion where bending deformation is likely to occur is reinforced, so that the bending drag can be efficiently increased while suppressing an increase in weight, and the load from the outside It is possible to suppress bending deformation of the frame body 10 in the vicinity of the end portion of the reinforcing plate 80 when.

  Also in the vehicle body frame 71, as in the vehicle body frame 51, the reinforcing plate 80 has a side surface in a direction orthogonal to the longitudinal direction of the frame body 10 at the end of the reinforcing plate 80 in the longitudinal direction of the frame body 10 compared to the central portion thereof. Since the width of the reinforcing plate 80 provided along the portion 11b is formed to be small, the reinforcing effect of the reinforcing plate 80 at the end of the reinforcing plate 80 can be reduced, and the frame near the end of the reinforcing plate 80 can be reduced. It is possible to effectively suppress the bending of the main body 10.

  The reinforcing plate 80 has a longitudinal length of the frame body 10 on the bottom surface portion 11a side of the first plate member 11 of the frame body 10 such that the length of the frame body 10 on the flat surface portion 12a side of the second plate member 12 of the frame body 10 is increased. The frame main body 10 is formed longer than the length of the frame main body 10 in the longitudinal direction and is formed in a constricted shape downward from the bottom surface portion 11a toward the flat surface portion 12a. The bending deformation of the bottom surface portion 11a toward the inward side of 10 can be effectively suppressed, and the above effect can be more effectively exhibited.

  FIG. 10 is a perspective view showing a main part of a vehicle body frame to which a vehicle frame structure according to the fifth embodiment of the present invention is applied. The fifth embodiment differs from the first embodiment only in the shape of the reinforcing plate and the connecting portion between the side surfaces, and therefore has the same configuration as that of the first embodiment and performs the same function. About a thing, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  As shown in FIG. 10, a vehicle body frame 91 to which a vehicle frame structure according to the fifth embodiment of the present invention is applied is similar to the vehicle body frame 1 according to the first embodiment in the longitudinal direction of the frame body 10. The reinforcing plate 100 is provided in a predetermined range including a portion where a load is assumed to act.

  Each reinforcing plate 100 is separated from the side surface portion 11b and extends along the side surface portion 11b. The reinforcing plate 100 is formed integrally with the base portion 101 in the longitudinal direction of the frame body 10 and in a direction perpendicular to the longitudinal direction. A plurality of convex portions 102 are arranged and protrude from the base portion 101 toward the side surface portion 11b and come into contact with the side surface portion 11b. The plurality of convex portions 102 are formed in a quadrangular frustum shape whose top surface portion 102a is a quadrangle. Although formed, the number of couplings connecting the convex portions 102 and the side surface portions 11b at the end portions of the reinforcing plate 80 in the longitudinal direction of the frame body 10 is smaller than that at the central portion.

  In the first to fourth embodiments described above, all the convex portions 22, 42, 62, 82 of the reinforcing plates 20, 40, 60, 80 are adhesively bonded to the side surface portion 11b by an adhesive not shown. However, in the vehicle body frame 91, although the plurality of convex portions 102 are all in contact with the side surface portion 11b, the adhesive material 105 is applied only to some of the convex portions 102 as shown in FIG. The frame body 10 is attached to the frame body 10 so that the number of connections with the frame 11b is smaller at the end of the reinforcing plate 100 in the longitudinal direction of the frame body 10 than at the center. In this way, the reinforcing plate 100 is attached at the end of the reinforcing plate 100 in the longitudinal direction of the frame body 10 so that the reinforcing strength by the reinforcing plate 100 is lower than that at the center.

  Further, in the vehicle body frame 91, the height of the convex portion 102 from the base portion 101 is formed at a constant height in the longitudinal direction of the frame body 10, and the convex portion 102 is in contact with the side surface portion 11b. Is provided at a constant distance from the side surface portion 11 b in the longitudinal direction of the frame body 10. In the reinforcing plate 100 as well, planar flange portions 23 and 24 are formed at both ends of the frame main body 10 in the orthogonal cross-sectional direction.

  Also in the vehicle body frame 91 configured in this way, a closed cross section is formed between the side surface portion 11b and the base portion 101 in the longitudinal direction of the frame body 10 and the direction orthogonal to the longitudinal direction, and the side surface portion 11b of the frame body 10 is formed. It is possible to effectively prevent the side surface portion 11b from bulging outward and being deformed out of the plane, and the bending resistance of the frame body 10 can be increased.

  Further, the reinforcing plate 100 is provided in a predetermined range including a portion where a load in the longitudinal direction of the frame body 10 can act, and the strength at the end of the reinforcing plate 100 in the longitudinal direction of the frame body 10 is higher than that of the central portion. By being attached to the frame body 10 so as to be low, only the portion where bending deformation is likely to occur is reinforced, so that the bending drag can be efficiently increased while suppressing an increase in weight, and the load from the outside It is possible to suppress bending deformation of the frame body 10 in the vicinity of the end portion of the reinforcing plate 100 when.

  Further, the reinforcing plate 100 is formed at the end portion of the reinforcing plate 100 in the longitudinal direction of the frame body 10 so that the number of couplings connecting the convex portion 102 and the side surface portion 11b is smaller than that of the central portion, By being attached to the frame main body 10 so as to reduce the coupling force, the reinforcing effect of the reinforcing plate 100 can be reduced at the end of the reinforcing plate 100, and the frame main body 10 is located near the end of the reinforcing plate 100. It is possible to effectively suppress bending deformation.

  In this embodiment, the reinforcing plates 20, 40, 60, 80, and 100 are adhesively bonded to the convex portions 22, 42, 62, 82, 102 and the side surface portion 11 b by the adhesive 105, but are bonded by spot welding. You may do it. In the first to fifth embodiments, the convex portions 22, 42, 62, 82, 102 of the reinforcing plates 20, 40, 60, 80, 100 are formed in a square frustum shape. Alternatively, it may be formed in a truncated pyramid shape, or may be formed in a truncated cone shape.

  Note that the bottom surface portion 11a of the first plate member 11 to which a force in the compression direction acts when a load is applied to the vehicle body frames 1, 31, 51, 71, 91 from the outside is described in the first claim. The flat surface portion 12a of the second plate-like member 12 that corresponds to the surface portion and on which the force in the tensile direction acts corresponds to the second surface portion described in the claims of the present application, and is between the bottom surface portion 11a and the flat surface portion 12a. The side surface portion 11b of the first plate-like member 11 positioned at the position corresponds to the third surface portion described in the claims of the present application.

  The present invention is not limited to the illustrated embodiments, and it goes without saying that various improvements and design changes can be made without departing from the gist of the present invention. For example, by combining the second embodiment and the fourth embodiment, the reinforcing plate 40 according to the second embodiment is formed in a tapered shape from the bottom surface portion 11a side toward the flat surface portion 12a, or Combining the second embodiment, the fourth embodiment, and the fifth embodiment, the reinforcing plate 40 according to the second embodiment is formed in a constricted shape downward from the bottom surface portion 11a toward the flat surface portion 12a. In addition, the number of couplings for coupling the convex portion 42 and the side surface portion 11b to the end portion of the reinforcing member in the longitudinal direction of the frame main body is smaller than that of the central portion thereof. You may make it comprise combining the frame structure for vehicles which concerns on a form suitably.

  The present invention provides a vehicle frame structure in which a reinforcing plate is attached to the inside of a tubular frame body, and can effectively increase bending resistance while suppressing an increase in weight, and is reinforced when a load acts from the outside. It is possible to provide a vehicle body frame structure that can suppress bending deformation of the frame body in the vicinity of the end portion of the plate, and it is widely used for a vehicle body frame that constitutes a part of the vehicle body such as a center pillar and a side sill. There is a possibility.

DESCRIPTION OF SYMBOLS 1, 31, 51, 71, 91 Body frame 10 Frame main body 10a, 10b Corner | angular part 11 1st plate-shaped member 11a The bottom face part (1st surface part) of a 1st plate-shaped member
11b Side surface portion (third surface portion) of first plate-like member
12 2nd plate-shaped member 12a Flat surface part (2nd surface part) of 2nd plate-shaped member
20, 40, 60, 80, 100 Reinforcement plate 21, 41, 61, 81, 101 Base 22, 42, 62, 82, 102 Convex

Claims (6)

A vehicle frame structure in which a reinforcing plate is attached to the inside of a tubular frame body in which a load can act from the outside,
The frame body is positioned between a first surface portion on which a force in the compression direction acts when a load is applied from the outside, a second surface portion on which a force in the tensile direction acts, and the first surface portion and the second surface portion. A third surface portion that forms a corner portion between the first surface portion and the second surface portion, and
The reinforcing plate is separated from the third surface portion, extends along the third surface portion, and is formed integrally with the base portion in a direction perpendicular to the longitudinal direction and the longitudinal direction of the frame body. A plurality of convex portions that are arranged in a plurality, protrude from the base portion toward the third surface portion, abut against the third surface portion, and at least a part of which is coupled to the third surface portion, and the third surface portion The reinforcing plate in the longitudinal direction of the frame body at the end of the reinforcing plate in the longitudinal direction of the frame body is provided in a predetermined range including a portion where the load in the longitudinal direction of the frame body can act. It is attached to the frame body so that its strength is lower than the center part
A vehicle frame structure characterized by that. The reinforcing plate has a lower coupling force with the third surface portion at the end portion of the reinforcing plate in the longitudinal direction of the frame body than in the central portion of the reinforcing plate in the longitudinal direction of the frame body. Attached to the body,
The vehicle frame structure according to claim 1. The reinforcing plate has a number of couplings connecting the convex portion and the third surface portion at the end portion of the reinforcing plate in the longitudinal direction of the frame body as compared to the central portion of the reinforcing plate in the longitudinal direction of the frame body. It is attached to the frame body so as to reduce,
The vehicle frame structure according to claim 2. The reinforcing plate is formed such that the height of the convex portion is lower than the central portion of the reinforcing plate in the longitudinal direction of the frame body at the end of the reinforcing plate in the longitudinal direction of the frame body.
The vehicle frame structure according to claim 1, wherein the vehicle frame structure is a vehicle frame structure. The reinforcing plate has a third surface portion in a direction orthogonal to the longitudinal direction of the frame body as compared to a central portion of the reinforcing plate in the longitudinal direction of the frame body at an end portion of the reinforcing plate in the longitudinal direction of the frame body. The width of the reinforcing plate provided along is formed small,
The vehicle frame structure according to any one of claims 1 to 4, wherein the vehicle frame structure is provided. The reinforcing plate is formed such that the longitudinal length of the frame body on the first surface side of the frame body is longer than the longitudinal length of the frame body on the second surface side of the frame body, It is formed in a constricted shape downward from the first surface side toward the second surface portion side of the frame body.
The vehicle frame structure according to claim 1, wherein the vehicle frame structure is a vehicle frame structure.