JP2014201071A - Rear suspension bracket structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rear suspension bracket structure in which simplification of manufacturing work and strength improvement against lateral input can be achieved adequately with a simple construction.SOLUTION: In a rear suspension bracket structure C in which provided are a bracket 2 in that upper parts of an outer side wall 20 and an inside wall 21 supporting a front end part 40 of a trailing arm are jointed to a rear side member 1, and a reinforcement 3 superimposed on the inside wall 21, the upper parts of the inside wall 21 and the reinforcement 3 are extended above a lower surface part 1c of the rear side member 1, and are jointed to an inside surface 1b of the rear side member 1. At the inside wall part 21 and the reinforcement 3, one or plural bead 24, 34a is formed so as to bridge from a position lower than the lower surface part 1c of the rear side member 1 to a high position.

Description

  The present invention relates to a rear suspension bracket structure for a vehicle such as an automobile.

An example of the rear suspension bracket structure is as shown in FIG. 6 (see, for example, Patent Document 1). In the drawing, the arrow Fr indicates the front of the vehicle, the arrow Ou indicates the outside in the vehicle width direction, and the arrow Up indicates the upper side.
In the structure shown in FIG. 6, a bracket 2 </ b> A is attached to the lower surface portion 1 c of the rear side member 1. The bracket 2A has an outer wall portion 20 and an inner wall portion 21 that are opposed to each other with an interval in the vehicle width direction, and the front end portion 40 of the trailing arm 4 is disposed and supported therebetween. The outer wall portion 20 and the inner wall portion 21 are both bent at the top and are welded to the lower surface portion 1 c of the rear side member 1. The outer side wall part 20 is joined to the inner panel 90a located on the outer side in the vehicle width direction. Reinforce 3 </ b> A is overlapped and welded to inner wall portion 21, and the upper portion of reinforce 3 </ b> A is welded to inner surface 1 b of rear side member 1. The reinforcement of the inner wall portion 21 is achieved by the reinforcement 3A.

  However, there is room for improvement in the prior art as follows.

First, since the upper portion of the outer wall portion 20 and the inner wall portion 21 are welded to the lower surface portion 1c of the rear side member 1, not only welding work but also positioning work before welding is much easier. is not. It is not easy to directly check the welded portion of the outer wall portion 20 or the inner wall portion 21, and there are cases where it is difficult to perform welding or subsequent inspection.
Secondly, bent portions 8 a and 8 b that are not welded to the rear side member 1 are formed on the upper portions of the outer wall portion 20 and the inner wall portion 21. When a lateral input (load input in the vehicle width direction) is received, such bent portions 8a and 8b are likely to become break points. The outer wall portion 20 can be relatively easily increased in strength by welding with the inner panel 90a or the like, but the inner wall portion 21 does not have such flexibility. Accordingly, it is desirable to appropriately cope with such a situation.

Japanese Patent No. 4753071

  The present invention has been conceived under the circumstances as described above, and a rear suspension bracket structure that can facilitate the manufacturing operation and improve the strength against lateral input appropriately with a simple configuration. The challenge is to provide

  In order to solve the above problems, the present invention takes the following technical means.

The rear suspension bracket structure provided by the present invention has an outer wall portion and an inner wall portion that are opposed to each other in the vehicle width direction with an interval and support the front end portion of the trailing arm of the rear suspension. The inner wall portion and the inner wall portion each include a bracket provided in a state of projecting below the rear side member by joining the upper portion thereof to the rear side member, and a reinforcement superimposed on the inner wall portion. A rear suspension bracket structure, wherein each of the inner wall portion and the upper portion of the reinforcement extends above the lower surface portion of the rear side member and is joined to the inner side surface of the rear side member, The inner wall portion and the reinforcement are lower than the lower surface portion of the rear side member. And so as to straddle placed al higher position is characterized by one or more beads are formed.

According to such a configuration, the following effects can be obtained.
First, the work of joining (welding, etc.) the upper part of the inner wall portion of the bracket to the rear side member can be easily performed from the lateral direction of the rear side member. Will also be easier. Further, since the joining direction of the inner wall portion with respect to the rear side member coincides with the joining direction of the reinforcement with respect to the rear side member, it is possible to consolidate and facilitate these joining operations. For this reason, the manufacturing operation can be facilitated appropriately.
Secondly, unlike the conventional case, a bent portion that is likely to become a break point when a lateral input is performed is not formed on the upper portion of the inner wall portion. For this reason, the intensity | strength with respect to a horizontal direction input can be raised.
Third, since the inner wall portion extends upward from the lower surface portion of the rear side member, when considering this inner wall portion, the inner wall portion is essentially of the same height as the lower surface portion of the rear side member. A part is more likely to be a break than other parts. On the other hand, according to the present invention, the bead is efficiently formed in such a portion, and further, the bead is formed in the reinforcement corresponding to the portion. The rigidity of the part can be increased and the effect of reinforcement by reinforcement can be enhanced. Therefore, it is possible to further increase the bracket strength with respect to the lateral input.

  In the present invention, preferably, the outer wall portion of the bracket has an upper portion extending upward from a lower surface portion of the rear side member and joined to the outer surface of the rear side member. It is also joined to an inner panel located outward in the width direction. A gusset is joined to the outer side of the inner panel in the vehicle width direction, and the gusset is higher from a position lower than the lower surface of the rear side member. One or more beads are formed so as to straddle the position.

  According to such a configuration, the strength of the outer wall portion of the bracket is appropriately and rationally increased, which is more preferable in increasing the strength of the entire bracket.

  Other features and advantages of the present invention will become more apparent from the following description of embodiments of the present invention with reference to the accompanying drawings.

It is a principal part schematic plane sectional view which shows an example of the rear suspension bracket structure which concerns on this invention. It is II-II sectional drawing of FIG. It is a perspective view which shows the example of the bracket used for the structure shown in FIG. FIG. 4 is an exploded perspective view of FIG. 3. It is a perspective view which shows the example of the gusset used for the structure shown in FIG. (A) shows an example of a prior art, (b) is VI-VI sectional drawing of (a).

Hereinafter, preferred embodiments of the present invention will be specifically described with reference to the drawings.
In the following description, the same reference numerals as in FIG. 6 are used as appropriate for elements that are the same as or similar to the structure shown in FIG.

  As shown in FIGS. 1 and 2, the rear suspension bracket structure C of the present embodiment includes a bracket 2 attached to the rear side member 1, a reinforcement 3, and a gusset 5.

  The bracket 2 has an outer wall portion 20 and an inner wall portion 21 that are opposed to each other at an interval in the vehicle width direction, and a front wall portion 22 that connects these front portions. These wall portions 20 to 22 each have a vertical wall shape protruding downward from the rear side member 1. The outer wall portion 20 and the inner wall portion 21 allow the front end portion 40 of the trailing arm (not shown) of the rear suspension to enter between and support the front end portion 40. The front end 40 is, for example, a rubber bush, and the trailing arm is the same as that shown in FIG.

  The bracket 2 and the reinforcement 3 have a form as shown in FIGS. 3 and 4, for example. The bracket 2 is configured by combining a first member A1 in which the front wall portion 22 and the inner wall portion 21 are integrally connected, and a second member A2 that constitutes the outer wall portion 20. The upper portion of the front wall portion 22 is welded to the lower surface portion 1 c of the rear side member 1.

  As shown in FIG. 2, the upper portion of the inner wall portion 21 extends above the lower surface portion 1 c of the rear side member 1 and is welded to the inner side surface 1 b of the rear side member 1. The reinforcement 3 is overlapped on the inner side of the inner side wall 21 in the vehicle width direction and welded to the inner side wall 21, and, like the inner side wall 21, extends above the lower surface 1 c of the rear side member 1, In addition, the rear side member 1 is welded to the inner side surface 1b. As shown in FIG. 3 and FIG. 4, a recess 30 for welding and a recess 31 are provided in the upper portion of the reinforcement 3, whereas a through hole 23 a and a protrusion are provided in the upper portion of the inner wall portion 21. 23b and a recess 23c are formed. Accordingly, the reinforcement 3 and the inner wall 21 are simultaneously welded to the rear side member 1, and the reinforcement 3 is welded to the rear side member 1 by using the through holes 23 a and the recesses 23 c of the inner wall 21. In addition, a mode in which the convex portion 23b of the inner wall portion 21 is welded to the rear side member 1 through the concave portion 31 of the reinforcement 3 alone is possible.

  The inner wall portion 21 is provided with one or a plurality of beads 24, and the reinforcement 3 is also provided with a plurality of beads 34 a and 34 b. These beads 34a and 34b are arranged in a substantially radial arrangement. Of these, the beads 34a located on the upper portion of the reinforcement 3 correspond to the beads 24 of the inner wall 21 and are overlapped with each other. It is possible. These beads 24 and 34a are vertical beads extending in the vertical height direction, and are provided so as to straddle from a position lower than the lower surface portion 1c of the rear side member 1 to a higher position as shown in FIG. .

  The upper portion of the outer side wall portion 20 also extends upward from the lower surface portion 1 c of the rear side member 1 and is welded to the outer side surface 1 a of the rear side member 1. An outer panel 90a such as a rocker is overlapped and welded to the outer side in the vehicle width direction of the outer side wall portion 20 and the rear side member 1. Gusset 5 is interposed and welded between inner panel 90a and side outer panel 90b on the outer side in the vehicle width direction. The gusset 5 has a form as shown in FIG. 5, for example, and is made of sheet metal. The gusset 5 increases the strength of the outer region in the vehicle width direction of the bracket 2, and the gusset 5 is formed with a plurality of beads 50 extending in the vehicle width direction. The plurality of beads 50 are provided in a range extending from a position lower than the lower surface portion 1c of the rear side member 1 to a higher position.

  Next, the operation of the rear suspension bracket structure C will be described.

  First, since the work of welding the upper part of the inner wall part 21 and the outer wall part 20 of the bracket 2 to the rear side member 1 is performed from the lateral direction of the rear side member 1, the welding work itself is easy and welding is also performed. Previous positioning work is also facilitated. In addition, it is easy to check the welding location. In particular, the inner wall 21 can be welded simultaneously with the reinforcement 3 being welded to the rear side member 1 as described with reference to FIGS. 3 and 4. Therefore, the work is reasonable and workability is good.

  The inner wall portion 21 and the outer wall portion 20 are not provided with portions corresponding to the bent portions 8a and 8b shown in FIG. As described above, the bent portions 8a and 8b are portions that are likely to become break points when inputting in the lateral direction. However, by eliminating the bent portions 8a and 8b, the strength against the input in the lateral direction can be increased.

  On the other hand, since the inner wall portion 21 extends upward from the lower surface portion of the rear side member 1, a portion having a height equivalent to that of the lower surface portion 1c of the rear side member 1 is likely to become a break point. Become. On the other hand, in the present embodiment, the bead 24 is formed in such a portion of the inner wall portion 21, and further, the bead 34 a is formed in the corresponding portion of the reinforcement 3. It is possible to increase the strength of this portion so that this portion does not become a break point.

  Unlike the inner wall 21, the outer wall 20 is appropriately reinforced by the inner panel 90 a and the gusset 5, although no bead is formed. For this reason, it is also appropriately avoided that the portion having the same height as the lower surface portion 1c of the rear side member 1 becomes a break point. The plurality of beads 50 of the gusset 5 provide an effect of efficiently and appropriately reinforcing the strength of the height portion equivalent to the lower surface portion 1 c of the rear side member 1.

The present invention is not limited to the contents of the above-described embodiment. The specific configuration of each part of the rear suspension bracket structure according to the present invention can be varied in design in various ways within the intended scope of the present invention.
In the above-described embodiment, both the outer wall portion 20 and the inner wall portion 21 of the bracket 2 extend above the lower surface portion 1c of the rear side member 1, and the side surface (the outer surface 1a or the inner surface 1b of the rear side member 1). However, the present invention is not limited to this. The outer wall portion 20 can be configured to be joined to the lower surface portion 1c of the rear side member 1 in the same manner as that shown in FIG.

C Rear suspension bracket structure 1 Rear side member 2 Bracket 3 Reinforce 5 Gusset 20 Outer wall (bracket)
21 Inner wall (of bracket)
22 Front wall (of bracket)
24 beads (inside wall)
34a Bead (Reinforce)
50 beads

Claims (2)

It has an outer wall portion and an inner wall portion that are opposed to each other in the vehicle width direction and that support the front end portion of the trailing arm of the rear suspension. The outer wall portion and the inner wall portion have upper portions on the rear side. A bracket provided in a state of protruding downward from the rear side member by being joined to the member;
Reinforce superimposed on the inner wall,
A rear suspension bracket structure comprising:
The upper portions of the inner wall portion and the reinforcement are extended above the lower surface portion of the rear side member and joined to the inner side surface of the rear side member,
The rear suspension bracket structure, wherein the inner wall portion and the reinforcement are formed with one or a plurality of beads extending from a lower position to a higher position than a lower surface portion of the rear side member. . The rear suspension bracket structure according to claim 1,
The outer wall portion of the bracket has an upper portion extending upward from the lower surface portion of the rear side member and joined to the outer surface of the rear side member, and is positioned outward of the rear side member in the vehicle width direction. It is also joined to the inner panel,
A gusset is joined to the outer side of the inner panel in the vehicle width direction, and one or a plurality of beads are formed on the gusset so as to straddle from a lower position to a higher position than the lower surface portion of the rear side member. The rear suspension bracket structure.

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