WO2012098630A1 - Structure for side portion of vehicle body - Google Patents

Abstract

The present structure for a side portion of a vehicle body is configured in such a manner that a reinforcement member (10) is affixed along the outer surface (2S) of a buckling section (2A) provided to the upper part of a rocker inner member (2). As a result of the configuration, the compressive deformation side of a rocker (1) which is compressed and deformed when the rocker (1) is subjected to bending deformation due to a load, particularly that caused by a frontal collision, is reinforced by the reinforcement member (10), and thus the reinforcement member (10) can efficiently reinforce the rocker (1). In addition, providing the reinforcement member (10) to the outer surface (2S) of the rocker inner member (2) facilitates the joining of the reinforcement member (10) to the rocker inner member (2) during assembling work, improves the productivity, prevents an assembling mistake, and facilitates the design of the rocker (1) according to the types of vehicles. Also, the reinforcement member (10) provides the rocker (1) with improved rigidity even against a side collision.

Description

Body side structure

More particularly, the present invention relates to a vehicle body side structure related to reinforcement of a rocker in which a rocker having a hollow shape formed by a rocker inner and a rocker outer extending in the front-rear direction of the vehicle body is disposed below the door opening of the vehicle body. .

Conventionally, as a technology in such a field, there is JP 2009-1113766 A. In the vehicle body side part structure described in this publication, a hollow rocker composed of a rocker inner and a rocker outer extending in the front-rear direction of the vehicle body is disposed on the lower side of the vehicle body. A reinforcement that extends in the front-rear direction of the vehicle body is joined near the upper corner of the inner surface of the rocker inner, and a plurality of (preferably three or more) closures are formed between the upper corner of the rocker inner and the reinforcement. A cross section is formed.

JP 2009-1113766 A

The reinforcement mentioned above is joined to the vicinity of the upper corner of the inner surface of the rocker inner, so that the function of improving the bending rigidity of the rocker is sufficiently exerted. Rockers are required to further improve bending rigidity and strength.

An object of the present invention is to provide a vehicle body side structure that can further improve the bending rigidity and strength of a rocker.

The present invention is a vehicle body side structure in which a rocker that is hollow with a rocker inner and a rocker outer extending in the front-rear direction of the vehicle body is disposed below the door opening of the vehicle body,
A reinforcing member extending along the rocker inner is joined to the upper part of the outer surface of the rocker inner.

In this vehicle body side structure, since the reinforcing member is joined along the upper part of the rocker inner, the reinforcing member reinforces the compression deformation side of the rocker, especially in the case of bending deformation of the rocker due to the load at the time of the front collision. The rocker can be reinforced. Moreover, since the reinforcing member is provided on the outer surface of the rocker inner, the reinforcing member is disposed at a position farther from the central axis of the reinforcing member than in the case where the reinforcing member is provided on the inner surface of the rocker inner as in the prior art. Will be. Accordingly, the bending rigidity and strength of the rocker can be further improved, and it is not necessary to perform excessive reinforcement, which contributes to weight reduction. And, by providing the reinforcing member on the outer surface of the rocker inner, it is easy to join the reinforcing member to the rocker inner during assembly work, improve the productivity, prevent erroneous assembly, and easily design the rocker according to the vehicle type Become.

Further, it is preferable that the reinforcing member is formed of a material having higher strength than the rocker.
If such a structure is employ | adopted, it can reinforce still more effectively.

Further, it is preferable that a hollow portion extending in the front-rear direction is formed between the reinforcing member and the rocker inner.
If such a structure is employ | adopted, it can reinforce still more effectively.

Further, the reinforcing member includes a main body part joined to the upper part of the outer surface of the rocker inner, a part attaching part that protrudes from the main body part toward the inside of the vehicle body and is fixed to the floor to allow the parts to be attached. This is preferable.
The reinforcement member can reduce the number of parts by integrating the main body portion and the part mounting portion, and can simplify the structure, improve the productivity, and improve the assembly workability. In addition, since the load applied to the rocker at the time of a collision can be efficiently released to the part mounting portion, the collision safety performance can be improved.

Further, it is preferable that the main body part and the part mounting part are connected via a superposed part overlapped by folding, and the superposed part is joined to the rocker inner.
If such a structure is employ | adopted, reinforcement reinforcement | strengthening of the main-body part of a reinforcement member can be aimed at by the superposition | polymerization part utilized for connection with the main-body part of a reinforcement member, and a part attachment part.

Further, it is preferable that the part is a seat fixing bracket provided on a slide rail of the seat, and the part mounting portion is a seat base portion that bolts the bracket.
By adopting such a configuration, it is not necessary to manufacture the seat pedestal part as a separate part, which contributes to a reduction in the number of parts and does not complicate the connection structure between the seat pedestal part and the rocker.

Further, the part is preferably a cross member extending in the left-right direction on the floor, and the part mounting portion is preferably a cross member insertion portion into which an end portion of the cross member is inserted.
By adopting such a configuration, the cross member can be reliably positioned, the assembly accuracy is improved, and the coupling structure between the cross member and the rocker is not complicated.

According to the present invention, it is possible to further improve the bending rigidity and strength of the rocker.

1 is a perspective view showing a first embodiment of a vehicle body side part structure according to the present invention. FIG. 2 is a cross-sectional view taken along the line II-II in FIG. (A) is a perspective view showing a bending moment applied to a rocker at the time of a collision, (b) is a sectional view showing a vehicle body side part structure according to the present invention, and (c) is a cross section showing a vehicle body side part structure according to the prior art. FIG. It is sectional drawing which shows the modification concerning 1st Embodiment. It is a perspective view which shows the other modification concerning 1st Embodiment. It is a perspective view which shows 2nd Embodiment of the vehicle body side part structure which concerns on this invention. FIG. 7 is a sectional view taken along line VII-VII in FIG. 6. It is sectional drawing which shows the modification concerning 2nd Embodiment. It is a perspective view which shows the other modification concerning 2nd Embodiment. It is sectional drawing which shows the further another modification concerning 2nd Embodiment. It is sectional drawing which shows the further another modification concerning 2nd Embodiment. It is a perspective view which shows 3rd Embodiment of the vehicle body side part structure which concerns on this invention.

Hereinafter, preferred embodiments of the vehicle body side part structure according to the present invention will be described in detail with reference to the drawings.
[First embodiment]

FIG. 1 shows a vehicle body side structure in which a hollow rocker 1 is disposed below the door opening of the vehicle body. As shown in FIGS. 1 and 2, a rocker (side sill) 1 is formed in a hollow shape by a rocker inner 2 and a rocker outer 3 extending in the front-rear direction of the vehicle body. The flange 2a of the rocker inner 2 and the flange 3a of the rocker outer 3 are welded in a state where the surfaces are aligned with each other.

At the upper part of the rocker inner 2, a bent portion 2 </ b> A having a cross-section “<” shape or a cross-section “L” shape is formed. A reinforcement member (reinforcement) 10 is fixed to the rocker inner 2 by spot welding or continuous welding along the outer surface 2S of the bent portion 2A. The reinforcing member 10 is bent and formed so that the upper piece 10a and the lower piece 10b extending in the longitudinal direction come into contact with the outer surface 2S of the bent portion 2A. The reinforcing member 10 has an upper piece 10a and a lower piece 10b that are fixed to the rocker inner 2 by welding, and is formed of a material that is stronger than the rocker 1 (for example, ultra-high strength steel).

The reinforcing member 10 includes a main body portion 10A composed of an upper piece 10a and a lower piece 10b, and a parts mounting portion 11 that protrudes from the main body portion 10A toward the inside of the vehicle body. The parts mounting part 11 is a seat base part for mounting a seat fixing bracket provided on the slide rail of the seat, and the seat base part 11 is fixed to the rocker inner 2 and the floor 12 by welding.

The upper wall portion 11a of the seat base portion 11 is connected to the main body portion 10A by a connecting piece 13 extending downward from the lower end 10c of the lower piece 10b, and has a U-shaped cross section by the upper wall portion 11a and both side wall portions 11b. Is formed. Bolt through holes 11c are formed in the upper wall portion 11a, and rectangular opening portions 11d for weight reduction are formed in the both side wall portions 11b. A flange 11e extending along the outer surface 2S of the rocker inner 2 and the surface of the floor 12 is formed at the lower ends of the side wall portions 11b. The flange 11e is fixed to the rocker inner 2 and the floor 12 by spot welding or continuous welding. .

In this vehicle body side structure, since the reinforcing member 10 is fixed along the outer surface 2S of the buckling portion 2A provided on the upper portion of the rocker inner 2, particularly when the rocker 1 is bent and deformed by the load at the time of the front collision, The reinforcing member 10 reinforces the compression deformation side of the rocker 1 and can reinforce the rocker 1 efficiently. Moreover, due to the provision of the reinforcing member 10 on the outer surface 2S of the rocker inner 2, the reinforcing member 10 can be easily joined to the rocker inner 2 during assembly work, productivity can be improved, and erroneous assembly can be prevented. The design of the rocker 1 according to the above becomes easy. Further, the reinforcing member 10 functions to increase the rigidity and strength of the rocker 1 even in a side collision.

As shown in FIG. 3 (a), the moment around the Z axis and the moment around the Y axis (pitching) are input to the rocker 1 by the tire 16 and the front pillar 14 at the time of the front collision. This causes the rocker inner 2 to bend and deform so as to be compressed. In the present invention, as shown in FIG. 3B, the reinforcing member 10 is provided on the outer surface 2S of the rocker inner 2, so that the conventional reinforcing member 15 (see FIG. 3C) is the rocker inner. It can be seen that the reinforcing member 10 of the present invention is disposed at a position far from the centroid M as compared with the case where the inner surface 2M is provided on the inner surface 2M. Therefore, the reinforcing member 10 of the present invention can further enhance the bending rigidity and strength of the rocker 1 as compared with the prior art, and the rigidity can be increased without excessive reinforcement. It also contributes to weight reduction.

Further, the reinforcing member 10 can reduce the number of parts by integrating the main body part 10A and the part mounting part (for example, the seat base part 11) into two parts, simplifying the structure and producing Thus, the assembly structure and the assembling workability can be improved, and the coupling structure between the seat base 11 and the rocker 1 is not complicated. In addition, the load applied to the rocker 1 at the time of a collision can be efficiently released to the part mounting portion 11 and the collision safety performance can be improved.

When the reinforcing member 10 is formed of a material having a higher strength than the rocker 1 (for example, a so-called high-tensile steel material that can be reduced in weight), the reinforcing member 10 can be reinforced more effectively.

As shown in FIG. 4, a bent portion 22 </ b> A having a trapezoidal cross section is formed on the top of the rocker inner 22 of the other rocker 21. A hollow portion 23 having a triangular cross section is formed between the outer surface 22S of the bent portion 22A of the rocker inner 22 and the main body portion 10A. The free end of the upper piece 10a and the free end of the lower piece 10b are fixed to the rocker inner 22 by spot welding or continuous welding. By providing the hollow portion 23, the bending rigidity of the rocker 21 in the vertical direction and the horizontal direction is sufficiently increased. As a result, collapse of the cross-sectional shape of the rocker 21 when a collision load is input is suppressed, and bending of the rocker 21 is suppressed.

As shown in FIG. 5, the reinforcing member 24 includes a main body portion 10 </ b> A and another part mounting portion 25. The parts mounting portion 25 is a cross member insertion portion that enables insertion of a cross member 26 extending in the left-right direction on the floor 12. The cross member insertion portion 25 is fixed to the rocker inner 2 and the floor 12 by welding. The flange 26a of the cross member 26 is fixed to the floor 12 by welding.

The cross member inserting portion 25 is connected to the main body portion 10A by a connecting piece 13 extending downward from the lower end 10c of the lower piece 10b, and is formed in a U-shaped cross section by the upper wall portion 25a and both side wall portions 25b. . A flange 25e that is in contact with the rocker inner 2 and the floor 12 is formed at the lower ends of the side wall portions 25b, and the flange 25e is fixed to the rocker inner 2 and the floor 12 by spot welding or continuous welding.

The reinforcement member 24 can reduce the number of parts such that two parts are made into one part by integrating the main body part 10A and the part attachment part (cross member insertion part) 25, simplifying the structure and improving productivity. Improvement and assembly workability can be improved, and the coupling structure between the cross member 26 and the rocker 1 is not complicated. Moreover, the load applied to the rocker 1 at the time of a collision can be efficiently released to the cross member insertion portion 25, and the collision safety performance can be improved. Furthermore, the cross member insertion portion 25 can reliably position the end portion of the cross member 26 on the floor 12, and can improve the assembly accuracy.
[Second Embodiment]

In describing the second embodiment, components that are the same as or equivalent to those in the first embodiment are given the same reference numerals, and redundant descriptions are omitted.

As shown in FIGS. 6 and 7, the reinforcing member 30 has a main body portion 10A and a seat base portion 11 as a part mounting portion, and the lower piece 10b of the main body portion 10A and the seat base portion 11 are folded back. It is connected via the overlapping superposition part 31. The overlapping portion 31 is formed by bringing the connecting piece 13 extending from the lower end 10c of the lower piece 10b into contact with the surface of the lower piece 10b of the main body portion 10A. The overlapping portion 31 is formed by welding. Fixed to. By this overlapping portion 31, the reinforcement of the main body portion 10A of the reinforcing member 30 can be achieved.

As shown in FIG. 8, in the use of the reinforcing member 30 described above, a hollow portion 33 having a triangular cross section is formed between the bent portion 22A of the rocker inner 22 and the main body portion 10A of the rocker 21. A part of the lower piece 10 b of the main body 10 </ b> A is reinforced by the overlapping portion 31.

As shown in FIG. 9, the reinforcing member 34 has a main body 10A and a cross member insertion part 25 as a part mounting part, and the lower piece 10b of the main body 10A and the cross member insertion part 25 overlap each other by folding. It is connected via the overlapped superposition part 35. The overlapping portion 35 is formed by bringing the connecting piece 13 extending from the lower end 10c of the lower piece 10b into contact with the surface of the lower piece 10b of the main body portion 10A. The overlapping portion 31 is formed by welding. Fixed to. With this overlapping portion 31, the reinforcement of the main body portion 10A of the reinforcing member 34 can be achieved.

As shown in FIG. 10, the reinforcing member 40 has a main body portion 10A and a seat base portion 11 as a part mounting portion, and the upper piece 10a of the main body portion 10A and the seat base portion 11 are overlapped by folding. It is connected via the superposition part 41. The overlapping portion 41 is formed by bringing a connecting piece 43 extending from the upper end 10d of the upper piece 10a into contact with the surface of the upper piece 10a of the main body portion 10A. The overlapping portion 41 is welded to the upper piece 10a by welding. Fixed. With this overlapping portion 41, the reinforcement of the main body portion 10A of the reinforcing member 40 can be enhanced.

As shown in FIG. 11, in the use of the reinforcing member 40 described above, a hollow portion 44 having a triangular cross section is formed between the bent portion 22A of the rocker inner 22 and the main body portion 10A of the rocker 21. A part of the upper piece 10 a of the main body 10 </ b> A is reinforced by the overlapping portion 41.

Needless to say, the present invention is not limited to the embodiment described above. For example, as illustrated in FIG. 12, the reinforcing member 50 includes a main body portion 10 </ b> A, a seat base portion 11, and a cross member insertion portion 25. As a result, the number of parts can be further reduced, and simplification of the structure, improvement of productivity, improvement of assembly workability, and prevention of erroneous assembly can be promoted. In addition, the load applied to the rocker at the time of collision can be efficiently released by the two systems of the seat base portion 11 and the cross member insertion portion 25, and the collision safety performance can be further improved.

In the reinforcing member 50, a superposed portion may be adopted.

According to the present invention, it is possible to further improve the bending rigidity and strength of the rocker.

DESCRIPTION OF SYMBOLS 1,21 ... Rocker, 2,22 ... Rocker inner, 3 ... Rocker outer, 10, 24, 30, 34, 40, 50 ... Reinforcement member, 11 ... Seat base part (part attachment part), 23, 33, 44 ... Hollow part 25 ... Cross member insertion part (part mounting part), 31, 35, 41 ... Overlapping part, 2S, 22S ... Outer surface of rocker inner.

Claims (7)

A vehicle body side structure in which a rocker that is hollow with a rocker inner and a rocker outer extending in the front-rear direction of the vehicle body is disposed below the door opening of the vehicle body,
A vehicle body side structure, wherein a reinforcing member extending along the rocker inner is joined to an upper portion of the outer surface of the rocker inner. The vehicle body side structure according to claim 1, wherein the reinforcing member is formed of a material having a higher strength than the rocker. 2. The vehicle body side structure according to claim 1, wherein a hollow portion extending in the front-rear direction is formed between the reinforcing member and the rocker inner. The reinforcing member includes a main body portion joined to an upper portion of the outer surface of the rocker inner, a part attaching portion that protrudes from the main body portion toward the inside of the vehicle body and is fixed to a floor to allow attachment of parts. The vehicle body side part structure according to any one of claims 1 to 3, characterized by comprising: The vehicle body side part structure according to claim 4, wherein the main body part and the part mounting part are connected via an overlapping part overlapped by folding, and the overlapping part is joined to the rocker inner. 6. The part according to claim 4, wherein the part is a seat fixing bracket provided on a slide rail of the seat, and the part mounting part is a seat base part that bolts the bracket. Car body side structure. The said part is a cross member extended in the left-right direction on the said floor, The said part attachment part is a cross member insertion part in which the edge part of the said cross member is inserted. Vehicle body side structure as described in 1.

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