JP2012086693A - Vehicle frame structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle frame structure enhancing a bending strength of a frame body while suppressing a weight increase.SOLUTION: The vehicle frame structure equipped with the closed cross-section-shaped frame body 10, is equipped with a reinforcing plate 20 which is formed integrally with: a base part 21 extending separately from the frame body inside angle parts 10a and 10b including ridge lines 11f and 11g formed between a first surface part 11c, and third surface parts 11a and 11b; and a plurality of raised parts 22 extending toward the frame body from the base part and abutting on the frame body. The plurality of raised parts are arranged in the longitudinal and cross-section orthogonal directions of the frame body, and the reinforcing plate is attached to the frame body while at least one raised part is joined to the first surface part, and at least one raised part is joined to the third surface part.

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, relates to a vehicle frame structure in which a reinforcing plate is attached in a frame body formed in a closed cross-sectional shape. .

  As is well known, a vehicle frame (body frame) such as a side sill or a pillar constituting a part of a vehicle body in a vehicle such as an automobile is generally formed in a closed cross-sectional shape. In addition, there is also known a vehicle body frame in which a reinforcing plate is attached to a frame body having a closed cross-sectional shape to reinforce the frame body.

  For example, in Patent Document 1, an inner panel side of a side sill formed in a closed cross-section shape with an outer panel and an inner panel is extended in the longitudinal direction of the side sill between the inner panel near the upper corner of the inner panel. The thing which attached the reinforcement board which forms a some closed cross-section part, and reinforced the side sill is disclosed.

  Further, for example, in Patent Document 2, both sides are arranged along the outer panel on the inner panel side of the center pillar formed by the outer panel and the inner panel in a closed cross-sectional shape, and the intermediate portion is the inner panel. A structure in which a reinforcing plate that protrudes toward the outer panel and forms a closed cross section extending in the longitudinal direction of the center pillar is attached to reinforce the center pillar is disclosed.

JP 2009-1113766 A JP 2008-230453 A

  As disclosed in Patent Document 1 and Patent Document 2, when a reinforcing plate is attached in the frame body, the frame body can be reinforced, but the reinforcing plate causes an increase in weight. In the body frame, how to reinforce effectively while suppressing an increase in weight is an important issue.

  On the other hand, in the case of body frames such as side sills and pillars, in order to ensure the safety of passengers, for example, in the event of a side collision, the frame main body will not be deformed to the inside of the vehicle even when an external load is applied to the frame main body. In addition, it is required to increase the bending strength of the frame body.

  By the way, when a load is applied from the outside to the frame body formed in a closed cross-sectional shape, an angle including a ridge line between the first surface portion on which a force in the compression direction acts when the load is applied and a surface portion adjacent to the surface portion. It is considered that the fact that the portion is crushed and deformed is one factor that promotes bending deformation of the frame body.

  However, the reinforcing plates disclosed in Patent Document 1 and Patent Document 2 are provided between a first surface portion on which a force in the compression direction acts and a surface portion adjacent to the surface portion when a load is applied to the frame body from the outside. There is a possibility that the corner portion is deformed and the frame body is bent and deformed.

  Therefore, according to the present invention, the bending of the frame body may cause the corner portion including the ridge line between the first surface portion to which a force in the compression direction is applied when a load is applied from the outside and the surface portion adjacent to the surface portion to be crushed and deformed. A vehicle frame structure capable of suppressing deformation of the corners and effectively increasing the bending strength of the frame body while suppressing an increase in weight, paying attention to one factor that promotes deformation. The purpose is to provide.

  For this reason, the invention according to claim 1 of the present application is a vehicle frame structure that includes a frame main body that forms a part of a vehicle body and has a closed cross-sectional shape, and the frame main body receives a load from the outside. Between the first surface portion on which the force in the compression direction acts, the second surface portion on which the force in the tensile direction acts, and the first surface portion and the second surface portion of the frame body, A third surface portion that forms a ridge line therebetween, inside the corner portion including the ridge line between the first surface portion and the third surface portion of the frame body, in a state of being separated from the frame body. A reinforcing plate integrally formed with a base portion extending along the inner surface of the corner portion and a plurality of convex portions projecting from the base portion toward the frame main body and coming into contact with the frame main body; The convex part is the longitudinal direction of the frame body and orthogonal to the longitudinal direction. The reinforcing plate is attached to the frame body with at least one convex portion coupled to the first surface portion and at least one convex portion coupled to the third surface portion. It is characterized by that.

  The invention according to claim 2 of the present application is the invention according to claim 1, wherein the plurality of convex portions are periodically arranged in the longitudinal direction and the orthogonal cross-sectional direction of the frame body, and The protrusions adjacent to each other in the longitudinal direction of the frame body overlap each other in the orthogonal cross-sectional direction of the frame body, and the protrusions adjacent to each other in the orthogonal cross-sectional direction of the frame body overlap each other in the longitudinal direction of the frame body. It is characterized by being formed as follows.

  Further, the invention according to claim 3 of the present application is the invention according to claim 1 or 2, wherein the reinforcing plate is arranged such that an end portion of the reinforcing plate in the longitudinal direction of the frame body is separated from the frame body. It is characterized by being formed.

  Furthermore, the 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 has an end portion of the reinforcing plate in an orthogonal cross-sectional direction of the frame body. It is characterized by being formed so as to be separated from 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 has a groove formed between the protrusions by the adjacent protrusions. The groove portion is filled with an adhesive that bonds the frame main body and the reinforcing plate.

  Still further, the invention according to claim 6 of the present application is characterized in that, in the invention according to any one of claims 1 to 5, the convex portion is formed in a polygonal frustum shape. Is.

  Furthermore, the invention according to claim 7 of the present application is characterized in that, in the invention according to claim 6, the convex portion is formed in a quadrangular frustum shape.

  Furthermore, the invention according to claim 8 of the present application is characterized in that, in the invention according to any one of claims 1 to 5, the convex portion is formed in a truncated cone shape. It is.

  Still further, the invention according to claim 9 of the present application is the invention according to any one of claims 1 to 8, wherein the frame main body is positioned at an upper surface portion extending in a substantially horizontal direction and below the upper surface portion. A side sill outer having a lower surface portion extending in a substantially horizontal direction, and a side wall portion extending in a substantially vertical direction from the lower surface portion to the upper surface portion and forming a ridge line between the upper surface portion and the lower surface portion, and A side sill inner having a side sill inner having a side wall extending in a substantially vertical direction and disposed inside the side wall of the side sill outer, and the reinforcing plate is formed on the side sill outer of the side sill. It is attached inside the corner | angular part containing the ridgeline between a side wall part and a lower surface part, It is characterized by the above-mentioned.

  According to the invention of claim 1 of the present application, on the inner side of the corner portion including the ridge line between the first surface portion and the third surface portion of the frame main body, on the inner surface of the corner portion of the frame main body in a state of being separated from the frame main body. A reinforcing plate integrally formed with a base extending along the base and a plurality of convex portions protruding from the base toward the frame main body and coming into contact with the frame main body. The reinforcing plate is attached to the frame body with at least one convex portion coupled to the first surface portion and one convex portion coupled to the third surface portion.

  As a result, a closed cross section is formed between the frame main body and the base in the longitudinal direction and the orthogonal cross sectional direction of the frame main body inside the corner including the ridge line between the first surface portion and the third surface portion of the frame main body. Since the vicinity of the ridgeline can be effectively reinforced, deformation of the corner including the ridgeline can be suppressed when a load is applied from the outside, and the bending strength of the frame body can be increased while suppressing an increase in weight. Can be increased.

  According to the invention of claim 2 of the present application, the reinforcing plate has a plurality of convex portions periodically arranged in the longitudinal direction and the orthogonal cross-sectional direction of the frame body, and adjacent to the longitudinal direction of the frame body. By forming the protrusions so as to overlap each other in the orthogonal cross-sectional direction of the frame main body and the protrusions adjacent to each other in the orthogonal cross-sectional direction of the frame main body overlap each other in the longitudinal direction of the frame main body, the frame main body and the base Is formed so as to extend at a predetermined angle with respect to the longitudinal direction of the frame body, so that the closed section extends so as to extend in the longitudinal direction of the frame body. Compared to the case, the bending strength of the frame body can be increased.

  Further, according to the invention of claim 3 of the present application, the reinforcing plate is formed so that the end portion of the reinforcing plate in the longitudinal direction of the frame body is separated from the frame body. Compared with the case where the end portion of the reinforcing plate is in contact with the frame main body, the deformation of the frame main body in the cross-sectional direction can be suppressed, and the bending strength of the frame main body can be further improved.

  Still further, according to the invention of claim 4 of the present application, the reinforcing plate is formed so that the end of the reinforcing plate in the orthogonal cross-sectional direction of the frame main body is separated from the frame main body. Compared with the case where the end portion of the reinforcing plate in the orthogonal cross-section direction is in contact with the frame body, deformation in the longitudinal direction of the frame body can be suppressed, and the bending strength of the frame body can be further improved.

  Still further, according to the invention according to claim 5 of the present application, the reinforcing plate has a groove portion formed between the convex portions by the adjacent convex portions, and the adhesive that bonds the frame body and the reinforcing plate to the groove portion. Since the portion corresponding to the closed cross-sectional portion formed between the frame main body and the base portion is constrained by the frame main body through the adhesive, the starting point of deformation of the frame main body is determined. The bending strength of the frame body can be further increased.

  Still further, according to the invention according to claim 6 of the present application, since the convex portion is formed in a polygonal frustum shape, the convex portion can be reliably brought into contact with the frame main body to be coupled, An effect can be produced more effectively.

  Still further, according to the invention of claim 7 of the present application, since the convex portion is formed in the shape of a quadrangular pyramid, the above-described effect can be realized more specifically by a relatively simple structure. .

  Furthermore, according to the invention according to claim 8 of the present application, since the convex portion is formed in a truncated cone shape, the convex portion is reliably brought into contact with the frame body by a relatively simple structure. They can be combined, and the effect can be more effectively achieved.

  Still further, according to the invention according to claim 9 of the present application, the frame body is a side sill having a side sill outer and a side sill inner and formed in a closed cross-sectional shape, and the reinforcing plate is a side wall portion of the side sill outer of the side sill. It is attached inside the corner | angular part containing the ridgeline between a lower surface part.

  As a result, a closed cross-section is formed between the side sill outer and the base of the reinforcing plate in the longitudinal direction and the orthogonal cross-section direction of the side sill inside the corner including the ridge line between the side wall and the lower surface of the side sill outer. Since the vicinity of the ridgeline can be effectively reinforced, deformation of the corner including the ridgeline can be suppressed when a load is applied from the outside, and the bending strength of the side sill is increased while suppressing an increase in weight. be able to.

It is a perspective view which shows the side sill to which the frame structure for vehicles which concerns on the 1st Embodiment of this invention is applied. It is a principal part enlarged view which expands and shows the principal part of the side sill shown in FIG. FIG. 3 is a cross-sectional view taken along line Y3a-Y3a and line Y3b-Y3b in FIG. FIG. 3 is a cross-sectional view taken along line Y4a-Y4a and line Y4b-Y4b in FIG. It is explanatory drawing for demonstrating the arrangement | sequence of the convex part of a reinforcement board. It is a graph which shows the result of having performed the side impact performance analysis about the vehicle body provided with the side sill which concerns on the 1st Embodiment of this invention. It is explanatory drawing for demonstrating the frame structure for vehicles which concerns on the 2nd Embodiment of this invention. It is explanatory drawing for demonstrating the frame structure for vehicles which concerns on the 3rd Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described 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.

  FIG. 1 is a perspective view showing a side sill to which a vehicle frame structure according to a first embodiment of the present invention is applied. In FIG. 1, in order to clearly show a reinforcing plate attached in the side sill, The frame main body constituting is shown by a two-dot chain line, which is shown in a transmissive state.

  As shown in FIG. 1, the side sill 1 as a vehicle body frame to which the vehicle frame structure according to the first embodiment of the present invention is applied is disposed so as to extend in the vehicle longitudinal direction at the lower part of the vehicle body. A frame body 10 having a closed cross section is provided, and a reinforcing plate 20 for reinforcing the frame body 10 is attached in the frame body 10 along the longitudinal direction of the frame body 10.

  In the side sill 1, the frame body 10 is closed by a side sill outer 11 that constitutes a part of the outer surface of the vehicle body and extends in the longitudinal direction of the vehicle body, and a side sill inner 12 that constitutes a part of the inner surface of the vehicle body and extends in the longitudinal direction of the vehicle body. It is formed in a cross-sectional shape.

  Specifically, the side sill outer 11 includes an upper surface portion 11a extending in a substantially horizontal direction, a lower surface portion 11b facing the upper surface portion 11a and positioned below the upper surface portion 11a, extending in a substantially horizontal direction, and a lower surface portion 11b. And a side wall portion 11c extending in a substantially vertical direction to the upper surface portion 11a. The side wall portion 11c bulges outside the vehicle.

  The side sill outer 11 is also formed with an upper flange portion 11d extending upward from the upper surface portion 11a at the inner end portion in the vehicle width direction of the upper surface portion 11a, and a lower surface portion at the inner end portion in the vehicle width direction of the lower surface portion 11b. A lower flange portion 11e extending downward from 11b is formed, and the side sill outer 11 is formed in a substantially cross-sectional hat shape.

  On the other hand, the side sill inner 12 has an upper surface portion 12a extending in a substantially horizontal direction, a lower surface portion 12b facing the upper surface portion 12a and positioned below the upper surface portion 12a, extending in a substantially horizontal direction, and an upper surface portion 12a from the lower surface portion 12b. And a side wall portion 12c extending in a substantially vertical direction until the side wall portion 12c bulges inside the vehicle.

  The side sill inner 12 also has an upper flange portion 12d extending upward from the upper surface portion 12a at the outer end portion in the vehicle width direction of the upper surface portion 12a, and a lower surface portion at the outer end portion in the vehicle width direction of the lower surface portion 12b. A lower flange portion 12e extending downward from 12b is formed, and the side sill inner 12 is formed in a substantially cross-sectional hat shape.

  The side sill outer 11 and the side sill inner 12 are joined to the upper flange portion 11d of the side sill outer 11 and the upper flange portion 12d of the side sill inner 12, and below the lower flange portion 11e of the side sill outer 11 and the side sill inner 12. The flange portion 12e is joined to thereby form the frame body 10 in a closed cross-sectional shape.

  In the frame body 10 formed in this way, a corner portion 10a including a ridge line 11f therebetween is formed by the upper surface portion 11a and the side wall portion 11c of the side sill outer 11, and the lower surface portion 11b and the side wall portion of the side sill outer 11 are formed. The corner portion 10b including the ridge line 11g therebetween is formed by 11c, and the corner portion 10c including the ridge line 12f therebetween is formed by the upper surface portion 12a and the side wall portion 12c of the side sill inner 12, and the lower surface portion of the side sill inner 12 The corner | angular part 10d containing the ridgeline 12g between them is formed of 12b and the side wall part 12c. The side sill outer 11 and the side sill inner 12 can each be formed by pressing a metal plate material such as a steel plate.

  As described above, in the side sill 1, when a load is applied from the outside, for example, at the time of a side collision, the load is input from the side wall portion 11c of the side sill outer 11 bulging to the outside of the vehicle. As described above, when a load is applied to the side sill 1, specifically, the frame main body 10, the frame main body 10 is deformed by bending a portion into which the load is input to the inside of the vehicle, and at the side wall portion 11 c of the side sill outer 11. Compressive stress is generated from both longitudinal ends of the frame body 10 in the longitudinal direction of the vehicle body, and compressive stress is generated. In the side wall portion 12c of the side sill inner 12, tensile forces are applied from both longitudinal ends of the frame body 10. Tensile stress will be generated.

  In the following description, the side wall portion 11c of the side sill outer 11 on which a force in the compression direction acts when a bending load is applied to the frame body 10 from the outside is represented as a first surface portion 11c, and the side sill inner on which a force in the tensile direction acts. 12 side wall portions 12c are represented as second surface portions 12c, and the upper surface portion 11a of the side sill outer 11 located between the side wall portion 11c of the side sill outer 11 and the side wall portion 12c of the side sill inner 12, the upper surface portion 12a of the side sill inner 12, and The lower surface portion 11b of the side sill outer 11 and the lower surface portion 12b of the side sill inner 12 are represented as third surface portions 11a, 12a and 11b, 12b, respectively.

  FIG. 2 is an enlarged view of the main part of the side sill shown in FIG. 1, and shows the main part of the side sill outer and the reinforcing plate attached to the side sill outer. 3 is a cross-sectional view taken along line Y3a-Y3a and Y3b-Y3b in FIG. 2, and FIG. 3A is a cross-sectional view taken along line Y3a-Y3a in FIG. ) Is a cross-sectional view taken along line Y3b-Y3b in FIG. 2, FIG. 4 is a cross-sectional view taken along lines Y4a-Y4a and Y4b-Y4b in FIG. 2, and FIG. 4 (a) is shown in FIG. FIG. 4B is a sectional view taken along line Y4a-Y4a, and FIG. 4B is a sectional view taken along line Y4b-Y4b in FIG.

  As shown in FIG. 2, the reinforcing plate 20 is attached to the inside of the corner portion 10 b including the ridge line 11 g between the side wall portion 11 c and the lower surface portion 11 b of the side sill outer 11 along the longitudinal direction of the frame body 10. The main body 10 is attached so as to cover the inner surface of the corner portion 10b including the ridge line 11g. The reinforcing plate 20 can also be formed by pressing a metal plate material such as a steel plate.

  The reinforcing plate 20 includes a base portion 21 extending along the inner surface of the corner portion 10b of the frame body 10 with a predetermined distance from the side wall portion 11c and the lower surface portion 11b of the side sill outer 11 of the frame body 10, and a base portion 21. It has a plurality of convex portions 22 that are formed integrally and project from the base portion 21 to the side wall portion 11c and the lower surface portion 11b, respectively, and are formed in a quadrangular 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 pyramid shape with the top surface portion 22 a being a quadrangle, and have a period in the longitudinal direction of the frame body 10 and the direction orthogonal to the longitudinal direction (orthogonal cross-sectional direction). Are arranged.

  Each of the plurality of convex portions 22 is arranged such that the square diagonal line of the top surface portion 22a is substantially parallel to the longitudinal direction and the orthogonal cross-sectional direction of the frame body 10, and the convex portions 22 adjacent to each other in the longitudinal direction of the frame body 10 are mutually connected. The frame body 10 has an overlap L1 in the orthogonal cross-sectional direction, and adjacent convex portions 22 in the frame body 10 in the orthogonal cross-sectional direction have an overlap L2 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.

  Thereby, in the reinforcing plate 20, the groove portion 25 is formed between the convex portions 22 by the adjacent convex portions 22, and specifically, the groove portion 25 is formed by the side surface portion 22 b and the base portion 21 of the adjacent convex portions 22. The groove 25 is formed in a mesh shape inclined at a predetermined angle with respect to the longitudinal direction of the frame body 10, 45 degrees in this embodiment. In this way, in the reinforcing plate 20, as shown in FIG. 2, the plurality of convex portions 22 are provided so that the base portion 21 that is linearly continuous in the longitudinal direction and the orthogonal cross-sectional direction of the frame body 10 is not formed. Yes.

  Further, as shown in FIGS. 3 and 4, the plurality of convex portions 22 are formed such that the height H <b> 1 of the convex portion 22 from the base portion 21 is substantially constant in the longitudinal direction and the orthogonal cross-sectional direction of the frame body 10. The top surface portion 22 a of the convex portion 22 is in contact with the side wall portion 12 c and the lower surface portion 12 b of the side sill outer 12. Thereby, the base 21 is provided so as to be separated from the frame body 10 by a predetermined distance.

  Thus, in the reinforcing plate 20, the base 21 is separated from the inner surface of the corner portion 10 b of the frame body 10 inside the corner portion 10 b including the ridge line 11 g between the side wall portion 11 c and the lower surface portion 11 b of the side sill outer 11. Is provided. Further, as shown in FIG. 2, the reinforcing plate 20 is formed such that a portion extending along the side wall portion 11 c of the side sill outer 11 and a portion extending along the lower surface portion 11 b of the side sill outer 11 are formed symmetrically. The convex portion 22 facing the ridge line 11g between the side wall portion 11c and the lower surface portion 11b of the side sill outer 11 is in contact with the side wall portion 11c and the lower surface portion 11b of the side sill outer 11, and the top surface portion 22a is It is curved.

  In FIG. 2, in the reinforcing plate 20, the convex portion 22 coupled to the side wall portion 11 c of the side sill outer 11 is indicated by a black circle (●). As shown in FIG. 2, the reinforcing plate 20 has a protruding portion 22 that abuts on the side wall portion 11 c of the side sill outer 11 near the ridge line 11 g between the side wall portion 11 c and the lower surface portion 11 b of the side sill outer 11. 11c.

  In the reinforcing plate 20, the lower surface portion of the side sill outer 11 in the vicinity of the ridge line 11g between the side wall portion 11c and the lower surface portion 11b of the side sill outer 11 is similarly applied to the portion extending along the lower surface portion 11b side of the side sill outer 11. The convex part 22 which contacts 11b is couple | bonded with this lower surface part 11b.

  In this way, the reinforcing plate 20 is coupled to the side wall portion 11c with all the convex portions 22 in which the top surface portion 22a of the convex portion 22 formed in a quadrangular pyramid shape contacts the side wall portion 11c of the side sill outer 11. All the convex portions 22 in which the top surface portion 22 a of the convex portion 22 formed in a quadrangular pyramid shape contacts the lower surface portion 11 b of the side sill outer 11 are coupled to the lower surface portion 11 b and attached to the frame body 10.

  In the present embodiment, the reinforcing plate 20 includes all the convex portions 22 in which the top surface portion 22a of the convex portion 22 abuts on the side wall portion 11c of the side sill outer 11 and the side wall portion 11c, and the top surface portion 22a of the convex portion 22 is the side sill outer. 11 are all coupled to the lower surface portion 11b. However, for the connection between the reinforcing plate 20 and the frame body 10, at least one convex portion 22 in the vicinity of the ridge line 11g between the side wall part 11c and the lower surface part 11b of the side sill outer 11 is connected to the side wall part 11c and the vicinity of the ridge line 11g. As long as at least one convex portion 22 is coupled to the lower surface portion 11b, the present invention is not limited to this.

  For example, the reinforcing plate 20 has a smaller number of couplings connecting the convex portions 22 and the side wall portions 11 c at the end of the reinforcing plate 20 in the longitudinal direction of the frame body 10 than the central portion, and the convex portions 22. And the lower surface portion 11b are attached to the frame main body 10 so that the strength is lower than the central portion of the reinforcing plate at the end of the reinforcing plate in the longitudinal direction of the frame main body. May be. Further, in this case, it is preferable that the central portion of the reinforcing plate in the longitudinal direction of the frame body corresponds to a portion where a load can act from the outside. Thereby, when a load acts from the outside, it is possible to suppress the frame body 10 from being bent and deformed in the vicinity of the end of the reinforcing plate 20 in the longitudinal direction of the frame body 10.

  Specifically, the reinforcing plate 20 and the frame main body 10 can be bonded to the convex portion 22 of the reinforcing plate 20 and the side wall portion 11c and the lower surface portion 11b of the side sill outer 11 by spot welding, an adhesive, or the like. .

  The reinforcing plate 20 is also provided so that both ends of the frame body 10 in the orthogonal cross-sectional direction are separated from the frame body 10. As shown in FIG. 3 (b), one end portion 23a in the orthogonal cross-sectional direction of the frame body 10 is provided so as to be separated from the side wall portion 11c in a state inclined at a predetermined angle from the side wall portion 11c of the side sill outer 11. As shown in FIG. 3A, the base 21 is provided so as to be separated from the frame body 10.

  Similarly, as shown in FIG. 3B, the other end 23b of the frame body 10 in the orthogonal cross-sectional direction is separated from the lower surface 11b while being inclined at a predetermined angle from the lower surface 11b of the side sill outer 11. As shown in FIG. 3 (a), it is provided so as to be farther from the frame body 10 than the base portion 21.

  As described above, the reinforcing plate 20 is formed so that the end portions 23a and 23b of the reinforcing plate 20 in the orthogonal cross-sectional direction of the frame body 10 are separated from the frame main body 10, whereby the orthogonal cross-sectional direction of the frame main body 10 is obtained. Compared to the case where the end portion of the reinforcing plate 20 is in contact with the frame main body 10, deformation in the longitudinal direction of the frame main body 10 can be suppressed, and the bending strength of the frame main body 10 can be improved.

  In the present embodiment, as shown in FIG. 1, the reinforcing plate 20 is periodically formed in the same shape in the longitudinal direction of the frame body 10, and the end of the reinforcing plate 20 in the longitudinal direction of the frame body 10 is also the same. Although formed in a shape, both ends of the reinforcing plate 20 in the longitudinal direction of the frame main body 10 are formed so as to be separated from the frame main body 10 in the same manner as both end portions 23a and 23b in the orthogonal cross-sectional direction of the frame main body 10. It is also possible. In such a case, the deformation of the frame body 10 in the orthogonal cross-sectional direction can be suppressed compared to the case where the end of the reinforcing plate 20 in the longitudinal direction of the frame body 10 is in contact with the frame body 10. The bending strength can be further improved.

  In the present embodiment, the reinforcing plate 20 is formed with only one convex portion 22 formed in a quadrangular pyramid shape along the side wall portion 11c of the side sill outer 10 in the orthogonal cross-sectional direction of the frame body 10, and the frame body 10, only one convex portion 22 formed in a quadrangular pyramid shape is formed along the lower surface portion 11 b of the side sill outer 10 in the orthogonal cross-sectional direction, but the side wall of the side sill outer 10 in the orthogonal cross-sectional direction of the frame body 10 is formed. A plurality of convex portions 22 formed in a quadrangular pyramid shape are formed along the portion 11c, and a plurality of convex portions 22 are formed along the lower surface portion 11b of the side sill outer 10 in the orthogonal cross-sectional direction of the frame body 10. Also good.

  In the present embodiment, the reinforcing plate 20 is provided inside the corner portion 10b including the ridge line 11g between the side wall portion 11c and the lower surface portion 11b of the side sill outer 11 of the frame body 10. The side sill outer 11 may be provided inside the corner portion 10a including the ridge line 11f between the side wall portion 11c and the upper surface portion 11a, or inside both corner portions 10a and 10b.

  Thus, in the vehicle frame structure according to the present embodiment, the frame body 10 includes the first surface portion 11c on which a force in the compression direction acts when a load is applied from the outside, and the second surface portion on which a force in the tension direction acts. 12c and third surface portions 11a, 12a and 11b, 12b which are located between the first surface portion 11c and the second surface portion 12c of the frame body 10 and form ridgelines 11f, 11g with the first surface portion 11c. A base 21 extending along the inner surfaces of the corners 10a and 10b of the frame body 10 in a state of being separated from the frame body 10 inside the corners 10a and 10b including the ridge lines 11f and 11g. A reinforcing plate 20 is provided, which is integrally formed with a plurality of protrusions 22 that protrude toward the frame body 10 and come into contact with the frame body 10.

  The plurality of convex portions 22 are arranged in the longitudinal direction of the frame body 10 and the orthogonal cross-sectional direction orthogonal to the longitudinal direction, and the reinforcing plate 20 has at least one convex portion 22 coupled to the first surface portion 11c. At least one convex portion 22 is coupled to the third surface portions 11 a and 11 b and attached to the frame body 10.

  As a result, the longitudinal direction and orthogonal cross section of the frame body 10 inside the corner portions 10a, 10b including the ridge lines 11f, 11g between the first surface portion 11c and the third surface portions 11a, 12a, 11b, 12b of the frame body 10. Since the closed cross section formed by the frame main body 10 and the groove 25 can be formed between the frame main body 10 and the base portion 21 in the direction to effectively reinforce the vicinity of the ridge lines 11f and 11g, a load acts from the outside. Thus, deformation of the corner portions 10a and 10b including the ridge lines 11f and 11g can be suppressed, and the bending strength of the frame body 10 can be increased while suppressing an increase in weight.

  In the reinforcing plate 20, a plurality of convex portions 22 are periodically arranged in the longitudinal direction and the orthogonal cross-sectional direction of the frame main body 10, and the convex portions 22 adjacent in the longitudinal direction of the frame main body 10 are mutually connected to the frame main body 10. The projections 22 adjacent to each other in the orthogonal cross-sectional direction of the frame main body 10 and the protrusions 22 adjacent to each other in the orthogonal cross-sectional direction of the frame main body 10 are formed so as to overlap each other in the longitudinal direction of the frame main body 10. The closed cross section formed by the frame main body 10 and the groove 25 is formed so as to extend at a predetermined angle with respect to the longitudinal direction of the frame main body 10. The bending strength of the frame body 10 can be increased compared to the case where the frame body 10 is formed so as to extend in the longitudinal direction.

  In the present embodiment, the frame body 10 has an upper surface portion 11a extending in a substantially horizontal direction, a lower surface portion 11b positioned below the upper surface portion 11a and extending in a substantially horizontal direction, and a substantially vertical direction from the lower surface portion 11b to the upper surface portion 11a. And a side sill outer 11 having a side wall portion 11c that forms ridge lines 11f and 11g between the upper surface portion 11a and the lower surface portion 11b, respectively, and is disposed on the vehicle inner side of the side wall portion 11c of the side sill outer 11 in a substantially vertical direction. A side sill 1 having a side sill inner 12 having a side wall portion 12c extending and having a closed cross-section, and the reinforcing plate 20 has a ridge line 11g between the side wall portion 11c of the side sill outer 11 of the side sill 1 and the lower surface portion 11b. It is attached inside the corner | angular part 10b containing.

  Accordingly, the side sill outer 11 and the base portion 21 of the reinforcing plate 20 are arranged in the longitudinal direction and the orthogonal cross-sectional direction of the side sill 1 inside the corner portion 10b including the ridge line 11g between the side wall portion 11c and the lower surface portion 11b of the side sill outer 11. Since the closed cross section formed by the frame body 10 and the groove 25 can be formed between them to effectively reinforce the vicinity of the ridge line 11g, the deformation of the corner part 10b including the ridge line 11g when a load is applied from the outside. The bending strength of the side sill can be increased while suppressing an increase in weight.

  In the side sill 1 disposed in the lower part of the vehicle body, for example, in the case of a side collision, a load is applied from the outside, and a torsional deformation may occur with the deformation of the pillar coupled to the side sill 1 toward the inside of the vehicle. By reinforcing the 11 ridge lines 11g, the deformation of the side sill 1 can be effectively suppressed.

  In the present embodiment, the side collision performance of the vehicle body including the side sill 1 as the vehicle body frame to which the vehicle frame structure according to the first embodiment is applied was evaluated by simulation analysis. In this analysis, evaluation was performed using a vehicle body provided with the side sill 1 as an example, and using a vehicle body obtained by removing only the reinforcing plate 20 of the side sill 1 from the vehicle body of the example as a comparative example.

  Specifically, a barrier as an indenter was pressed from the side of the vehicle body with a load F on a vehicle body provided with a side sill, and a reaction force F ′ with respect to the barrier load F and an energy absorption amount EA were evaluated. The energy absorption amount EA is energy that can be absorbed by the vehicle body, and is represented by the product of the reaction force F ′ against the load F and the stroke of the barrier.

  FIG. 6 is a graph showing the result of side impact performance analysis for the vehicle body provided with the side sill according to the first embodiment of the present invention. In FIG. 6, the stroke from the position where the barrier contacts the vehicle body is On the axis, the reaction force F ′ against the barrier load is displayed on the left vertical axis, and the energy absorption amount EA is displayed on the right vertical axis. In FIG. 6, the analysis result of the example is indicated by a solid line, and the analysis result of the comparative example is indicated by a broken line.

  As shown in FIG. 6, in both the example and the comparative example, when the barrier stroke increases, the reaction force F ′ against the barrier load increases and the energy absorption amount EA increases. In comparison, the reaction force F ′ with respect to the load on the barrier is increased, and the energy absorption amount EA is increased.

  Thus, in the side sill 1, the reinforcing plate 20 is provided in the corner portion 10b including the ridge line 11g between the side wall portion 11c and the lower surface portion 11b of the side sill outer 11, so that the side sill 1 has a longitudinal direction and an orthogonal sectional direction. A closed cross section formed by the side sill outer 11 and the groove 25 can be formed between the side sill outer 11 and the base portion 21 of the reinforcing plate 20 to effectively reinforce the vicinity of the ridge line 11g, thereby suppressing an increase in weight. However, the bending strength of the side sill 1 can be increased.

  FIG. 7 is an explanatory diagram for explaining a vehicle frame structure according to the second embodiment of the present invention. The vehicle frame structure according to the second embodiment of the present invention is different from the vehicle frame structure according to the first embodiment of the present invention except that the groove 25 formed in the reinforcing plate 20 is filled with an adhesive. Since those having the same configuration and having the same function are denoted by the same reference numerals, description thereof will be omitted. FIG. 7 shows a cross section corresponding to FIG.

  As shown in FIG. 7, in the vehicle frame structure according to the second embodiment of the present invention as well as the vehicle frame structure according to the first embodiment of the present invention, the frame formed in a closed cross-sectional shape. A base 21 extending along the inner surface of the corner 10b of the frame main body 10 in a state of being separated from the frame main body 10 inside the corner 10b of the main body 10, and a frame main body protruding from the base 21 toward the frame main body 10 A reinforcing plate 20 integrally formed with a plurality of convex portions 22 that contact 10 is attached, and the reinforcing plate 20 has groove portions 25 formed between the convex portions 22 by adjacent convex portions 22. In the vehicle frame structure according to the second embodiment, the groove portion 25 of the reinforcing plate 20 is filled with an adhesive 27 that bonds the frame main body 10 and the reinforcing plate 20.

  Further, in this case, it is preferable that the convex portion 22 of the reinforcing plate 20 and the side wall portion 11c and the lower surface portion 11b of the side sill outer 11 are coupled by an adhesive. In such a case, the filling of the adhesive 27 into the groove portion 25 of the reinforcing plate 20 and the application of the adhesive to the top surface portion 22a of the convex portion 22 of the reinforcing plate 20 can be performed at the same time, thereby improving work efficiency. be able to.

  In addition, as the adhesive 27, for example, a sheet-like thermosetting adhesive having a predetermined thickness that foams when heated to a predetermined temperature can be used. In such a case, the adhesive can be attached to the reinforcing plate 20 before foaming, and then foamed by heating to a predetermined temperature and filled between the frame body 10 and the reinforcing plate 20.

  As described above, the reinforcing plate 20 is formed with the groove 25 between the protruding portions 22 by the adjacent protruding portions 22, and the groove 25 is filled with the adhesive 27 for bonding the frame body 10 and the reinforcing plate 20. As a result, a portion corresponding to the closed cross-section formed by the frame main body 10 and the groove 25 is constrained by the frame main body 10 between the frame main body 10 and the base portion 21 via the adhesive 27. Therefore, the starting point of deformation of the frame body 10 can be eliminated, and the bending strength of the frame body 10 can be further increased.

  FIG. 8 is an explanatory diagram for explaining a vehicle frame structure according to the third embodiment of the present invention. The vehicle frame structure according to the third embodiment of the present invention is different from the vehicle frame structure according to the first embodiment of the present invention except that the convex portions formed on the reinforcing plate are formed in a truncated cone shape. Since these are the same, only the shape of the convex portions formed on the reinforcing plate will be described.

  As shown in FIG. 8, also in the vehicle frame structure according to the third embodiment of the present invention, the reinforcing plate 40 extends along the inner surface of the corner portion 10 b of the frame body 10 while being separated from the frame body 10. An existing base 41 and a plurality of convex portions 42 projecting from the base 41 toward the frame main body 10 and abutting against the frame main body 10 are integrally formed, and the plurality of convex portions 42 are in the longitudinal direction of the frame main body 10. In the vehicle frame structure according to the third embodiment, the plurality of convex portions 42 include a circular top surface portion 42a and side surface portions 42b. It is formed in a truncated cone shape.

  Even when the plurality of convex portions 42 are formed in the shape of a truncated cone, the plurality of convex portions 42 are periodically arranged in the longitudinal direction and the orthogonal cross-sectional direction of the frame body 10 and are adjacent to each other in the longitudinal direction of the frame body 10. The convex portions 42 are formed so as to overlap with each other in the orthogonal cross-sectional direction of the frame body 10 and adjacent convex portions 42 in the orthogonal cross-sectional direction of the frame body 10 overlap with each other in the longitudinal direction of the frame main body 10. Yes.

  As described above, even when the plurality of convex portions 42 are formed in a truncated cone shape, the reinforcing plate 40 has the convex portions 42 adjacent to each other in the longitudinal direction of the frame body 10 overlapping each other in the orthogonal cross-sectional direction of the frame body 10 L11. And the convex portions 42 adjacent to each other in the orthogonal cross-sectional direction of the frame body 10 are formed so as to overlap each other in the longitudinal direction of the frame body 10 and have L12, so that a groove 45 is provided between the frame body 10 and the base portion 41. Since the closed cross-section portion to be formed is formed to extend at a predetermined angle with respect to the longitudinal direction of the frame body 10, the closed cross-section portion is formed to extend in the longitudinal direction of the frame body 10. In comparison, the bending strength of the frame body 10 can be increased.

  In the first and second embodiments described above, the plurality of convex portions 22 formed on the reinforcing plate 20 are formed in a quadrangular frustum shape, but are formed in other polygonal frustum shapes. You may do it.

  As described above, 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.

  INDUSTRIAL APPLICABILITY The present invention can provide a vehicle frame structure that can increase the bending strength of the frame body while suppressing an increase in weight, and is widely used for a vehicle body frame that forms part of a vehicle body such as a side sill or a pillar. There is a possibility that.

DESCRIPTION OF SYMBOLS 1 Side sill 10 Frame main body 10a, 10b, 10c, 10d Corner | angular part 11 Side sill outer 11a Upper surface part (3rd surface part) of a side sill outer
11b Lower side (third surface) of side sill outer
11c Side sill outer side wall (first surface)
11f, 11g, 12f, 12g Ridge line 12 Side sill inner 12c Side wall part (second surface part) of side sill inner
20, 40 Reinforcement plate 21, 41 Base 22, 42 Convex 25, 45 Groove 27 Adhesive

Claims (9)

A vehicle frame structure comprising a part of a vehicle body and having a frame body formed in a closed cross-sectional shape,
The frame body includes 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 a first surface portion and a second surface portion of the frame body. And a third surface portion that forms a ridge line with the first surface portion,
A base portion extending along an inner surface of the corner portion of the frame main body inside the corner portion including a ridge line between the first surface portion and the third surface portion of the frame main body and spaced from the frame main body; and A reinforcing plate integrally formed with a plurality of convex portions protruding from the base toward the frame body and contacting the frame body;
The plurality of convex portions are arranged in a longitudinal direction of the frame body and an orthogonal cross-sectional direction orthogonal to the longitudinal direction, and the reinforcing plate includes at least one convex portion coupled to the first surface portion. The two convex portions are coupled to the third surface portion and attached to the frame body,
A vehicle frame structure characterized by that. In the reinforcing plate, the plurality of convex portions are periodically arranged in the longitudinal direction and the orthogonal cross-sectional direction of the frame body, and the convex portions adjacent to each other in the longitudinal direction of the frame body are mutually orthogonal cross-sections of the frame body. Convex portions that overlap in the direction and are adjacent to each other in the orthogonal cross-sectional direction of the frame body are formed to overlap each other in the longitudinal direction of the frame body.
The vehicle frame structure according to claim 1. The reinforcing plate is formed such that an end portion of the reinforcing plate in the longitudinal direction of the frame body is separated from the frame body.
The vehicle frame structure according to claim 1, wherein the vehicle frame structure is a vehicle frame structure. The reinforcing plate is formed such that an end portion of the reinforcing plate in the orthogonal cross-sectional direction of the frame body is separated from 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 groove formed between the convex portions by the adjacent convex portions,
The groove is filled with an adhesive that bonds the frame body and the reinforcing plate,
The vehicle frame structure according to any one of claims 1 to 4, wherein the vehicle frame structure is provided. The convex portion is formed in a polygonal frustum shape,
The vehicle frame structure according to claim 1, wherein the vehicle frame structure is a vehicle frame structure. The convex portion is formed in a truncated pyramid shape,
The vehicle frame structure according to claim 6. The convex portion is formed in a truncated cone shape,
The vehicle frame structure according to claim 1, wherein the vehicle frame structure is a vehicle frame structure. The frame body includes a top surface extending in a substantially horizontal direction, a bottom surface positioned below the top surface and extending in a substantially horizontal direction, and extending from the bottom surface to the top surface in a substantially vertical direction. A closed cross-section comprising a side sill outer having a side wall portion that forms a ridge line with the lower surface portion, and a side sill inner having a side wall portion that is disposed inside the side wall portion of the side sill outer and extends in a substantially vertical direction. A side sill formed on
The reinforcing plate is attached to an inner side of a corner portion including a ridge line between a side wall portion and a lower surface portion of the side sill outer of the side sill.
The vehicle frame structure according to claim 1, wherein the vehicle frame structure is a vehicle frame structure.

Images