JP5637478B2 - Vehicle front structure - Google Patents

Description

  The present invention provides a suspension member that is supported by the left and right side members and is formed in a hollow shape by joining an upper plate member and a lower plate member, and a stabilizer fixing member that is attached to the suspension member. The present invention relates to a vehicle front structure including a stabilizer fixed to both ends of a lower surface and a lower arm supported by the suspension member by a support bracket attached to the suspension member.

  There exists patent document 1 shown below as prior art document information relevant to the front part structure of this kind of vehicle. In the vehicle front structure described in Patent Document 1, a part of the support bracket is superposed on the upper plate of the suspension member, and the leg portion of the stabilizer fixing member is placed thereon, and these three members are mounted. Are tightened together by screw means inserted through through holes formed in each member, thereby increasing the rigidity in the vicinity of the stabilizer fixing portion.

JP 2008-1307 (paragraph 0039, FIG. 17)

  However, in the vehicle front structure described in Patent Document 1, when it is necessary to further increase the rigidity in the vicinity of the stabilizer fixing portion, a method of providing a reinforcing member or increasing the thickness of the material can be considered. . However, in recent years, the demand for weight reduction of vehicles has increased, and providing new members and increasing the plate thickness are contrary to weight reduction of vehicles, and it is difficult to say that it is a good measure in terms of cost and productivity.

  Accordingly, an object of the present invention is to fix the stabilizer without affecting the material cost and productivity while maintaining the weight reduction of the vehicle as much as possible in view of the problems given by the vehicle front structure according to the prior art exemplified above. An object of the present invention is to provide a front structure of a vehicle capable of enhancing rigidity in the vicinity of a portion.

The characteristic structure of the vehicle front structure according to the present invention includes a suspension member that is supported by left and right side members, and is formed in a hollow shape by joining an upper plate member and a lower plate member, and a stabilizer fixed to the suspension member. In a vehicle front structure, comprising: a stabilizer fixed to both ends of the upper or lower surface of the suspension member by a member; and a lower arm supported by the suspension member by a support bracket attached to the suspension member; A part of the support bracket is extended and fixed to the position of the stabilizer fixing member, a vertical wall surface portion is formed on the left and right lateral sides of the suspension member, and the vertical wall surface portion on the upper surface or the lower surface of the suspension member is formed. near portion are provided with the stabilizer fixing member, wherein On the surface of the suspension member on the side where the stabilizer is provided, a reinforcing piece made of a rust-proof steel plate, an extension part of the support bracket, the stabilizer fixing member in this order, or an extension part of the support bracket, The reinforcing piece, the stabilizer fixing member are stacked in this order, and the suspension member, the reinforcing piece, the extended portion of the support bracket, the stabilizer fixing member, and a common bolt that passes through each of them, The bolt is fastened by a nut corresponding to the bolt .

  In the front structure of the vehicle having the above characteristic configuration, first, the vertical wall surface portion is provided on the lateral side portion of the suspension member. Therefore, by attaching the stabilizer fixing member to the vicinity of the vertical wall surface portion having high vertical rigidity. Also, the mounting rigidity in the vicinity of the stabilizer fixing portion can be appropriately increased without hindering the weight reduction of the vehicle.

  In addition, since the three members, part of the suspension member, the extension part of the support bracket, and the leg part of the stabilizer fixing member, are overlapped and connected to the reinforcing piece made of a rust-proof steel plate, the thickness of the reinforcing piece to be adopted As a result, the rigidity in the vicinity of the stabilizer fixing portion can be freely set to an appropriate level.

  In this type of vehicle front structure, there is a tendency that the electrodeposition coating liquid does not easily permeate the boundary surface between the members that are connected to each other. In the structure, an effect of suppressing the necessity of configuring a large member such as a suspension member or a support bracket with a rust-proof steel plate can be obtained by configuring the reinforcing piece with the rust-proof steel plate.

  In addition, when connecting the stabilizer fixing member, the extending portion of the support bracket, the suspension member, and the reinforcing piece, the upper plate member or the lower plate member of the suspension member is the innermost side, and the stabilizer fixing member is the outermost side. However, any of the extended portion of the support bracket interposed between them and the reinforcing piece may be overlapped inside.

It is the side view which showed the front part structure of the vehicle. It is the top view which showed the front part structure of the vehicle. It is the perspective view which showed the side end part of the suspension member. It is sectional drawing which showed the side end part of the suspension member. It is the top view which showed the side part of the suspension member It is sectional drawing which showed the stabilizer fixing | fixed part. It is the perspective view which showed the external appearance of the reinforcement piece. It is sectional drawing corresponding to FIG. 6 when not using a stabilizer.

Hereinafter, an embodiment in which a front structure of a vehicle according to the present invention is applied to an FF (front engine / front drive system) vehicle will be described with reference to the drawings.
As shown in FIGS. 1 and 2, a pair of left and right side members 4 are extended in the vehicle front-rear direction at the front portion of the vehicle. The suspension member 1 is disposed in the vehicle width direction so as to bridge the left and right side members 4. Both end portions of the suspension member 1 are bolted to the side member 4 via the stay member 7 and the connecting member 10, and are connected to the connecting portion 4 a protruding downward from the side member 4 by the bolt 16.

  As shown in FIG. 3, the suspension member 1 is composed of an upper member 2 (upper plate member) constituting the upper surface and the side surface and a lower member 3 (lower plate member) constituting the lower surface. The upper member 2 and the lower member 3 are both manufactured by pressing a plate material, and the hollow suspension member 1 is configured by welding and joining the two.

  As shown in FIG. 3, the stay member 7 is formed in a rectangular tube shape from a main member 7a having a U-shaped cross section and a sub member 7b disposed in the main member 7a. A closed space is formed by a lower arm mounting bracket 11 described later. The stay member 7 is provided in the vertical direction. The lower ends of the main member 7a and the sub member 7b are welded to the suspension member 1 and the lower arm mounting bracket 11, and the upper end of the main member 7a is bolted to the side member 4. Is done. The connecting member 10 is provided in the vehicle front-rear direction, and its front end is bolted to the rear end of the lower member 3 and its rear end is bolted to the side member 4.

  As shown in FIGS. 1 to 3, the bifurcated lower arm 6 that supports the front wheel 20 is coupled to the suspension member 1 at a front coupling portion 6 a and a rear coupling portion 6 b. The lower arm mounting bracket 11 to which the front side connecting portion 6a of the lower arm 6 is mounted has a substantially rectangular parallelepiped shape, but has an open side surface and bottom surface in the vehicle width direction, and has a U-shaped cross-sectional shape in plan view.

  As shown in FIG. 4, the lower arm mounting bracket 11 is welded to the lower member 3 of the suspension member 1 at the lower end thereof. A weld nut 14 is attached to the lower arm attachment bracket 11 and is fixed to the upper member 2 by bolts 15 in the front-rear direction. The front side connecting portion 6a of the lower arm 6 is disposed in a space formed by the lower arm mounting bracket 11 and the lower member 3, and is supported by a bolt 15 so as to be swingable up and down with respect to the lower arm mounting bracket 11.

  Next, the attachment structure of the rear side connection part 6b of the lower arm 6 is demonstrated. As shown in FIG. 3, a support bracket 12 having a generally L-shaped cross section is disposed at the rear end corner of the upper member 2. The upper surface of the support bracket 12 has an attachment portion 12a extending from the upper member 2 to the outside in the vehicle width direction, and an extending portion 12b extending in the vehicle front direction (left side in FIG. 3).

  As shown in FIG. 4, the lower end portion of the support bracket 12 is welded to the lower member 3. The rear side connecting portion 6b of the lower arm 6 is disposed in a space formed between the mounting portion 12a of the support bracket 12 and the lower member 3, and is fixed to the support bracket 12 and the lower member 3 by bolts 16 in the vertical direction. . At this time, the support bracket 12 is also coupled to the side member 4 by the bolt 16 via the connecting portion 4a.

  As shown in FIG. 2, the stabilizer 5 is rotatably supported by a pair of stabilizer fixing members 13 arranged at both left and right ends of the suspension member 1 (upper member 2). Further, both ends of the stabilizer 5 are connected to a lower arm 6 or a knuckle (not shown). As shown in FIG. 4, the stabilizer fixing member 13 is fixed to the upper member 2 by weld nuts 17 and bolts 18 attached to two locations on the inner surface of the upper member 2. At this time, the extending portion 12b of the support bracket 12 extended to the position of the stabilizer fixing member 13 and a plate-like reinforcing piece 19 described later are fastened together with the stabilizer fixing member 13 to the upper member 2 by the bolts 18. .

  As shown in FIGS. 5 and 6, a vertical wall surface portion 2 b is formed on the lateral side portion 2 a of the suspension member 1 (upper member 2) by bending with a press, and an edge portion thereof is welded to the lower member 3. In FIG. 5, the support bracket 12 is not shown to clearly show the above feature. By forming the vertical wall surface portion 2b on the lateral side portion 2a of the suspension member 1, the longitudinal rigidity of the lateral side portion 2a of the suspension member 1 is improved, and an improvement in the rigidity in the vehicle width direction can be expected.

  Therefore, as shown in FIG. 5, by arranging the stabilizer fixing member 13 in the vicinity of the vertical wall surface portion 2b, the mounting rigidity of the stabilizer fixing member 13 is strengthened, and the load concentrated on the fixing portion of the stabilizer 5 can be increased. Durable structure. Since such a configuration does not require a new reinforcing member or an increase in material plate thickness, it contributes to reducing the weight of the vehicle and at the same time is desirable from the viewpoint of cost, productivity, and the like.

  In particular, as shown in FIG. 5, the vertical wall surface portion 2 b is configured to extend in parallel with the two front and rear bolts 18 (weld nuts 17) fixing the stabilizer fixing member 13. 18 becomes closer to the vertical wall surface portion 2b, which contributes to an improvement in the mounting rigidity of the stabilizer fixing member 13.

  Further, as shown in FIG. 6, the extension portion 12 b of the support bracket 12 extended to the position of the stabilizer fixing member 13 is fastened together with the reinforcing piece 19 and the stabilizer fixing member 13 to the upper member 2. The mounting rigidity of the fixing member 13 can be further improved. Also with this configuration, since no new member is required, problems such as vehicle weight reduction, cost increase suppression, and productivity improvement can be solved.

  Note that, in the extended portion 12b of the support bracket 12, a protruding portion 12c such as an oval shape is projected upward in a plan view. The back surface side of the raised portion 12 c is a space for storing the reinforcing piece 19. The reinforcing piece 19 is also provided with a pair of through holes 19a for receiving the bolts 18. On the suspension member 1 (upper member 2), the reinforcing piece 19, the extended portion 12b of the support bracket 12, and the stabilizer fixing member 13 are provided. When the members are stacked in this order and fastened with the weld nut 17 and the bolt 18, these four members are firmly fixed. At this time, the rigidity in the vicinity of the stabilizer fixing portion can be appropriately adjusted depending on the thickness of the reinforcing piece 19 to be used.

  By the way, since the upper surface of the upper member 2 and the lower surface of the extending portion 12b of the support bracket 12 are in close contact with the upper and lower surfaces of the reinforcing piece 19 in the vicinity of the stabilizer fixing portion, electrodeposition is performed on the boundary between these three members. Although an area in which the coating liquid is difficult to penetrate is generated, the reinforcing piece 19 is formed of a rust-proof steel material, so that it is not necessary to configure large parts such as the upper member 2 and the support bracket 12 from the rust-proof steel material. .

[Another embodiment]
<1> Even if the extended portion 12b of the support bracket 12, the reinforcing piece 19, and the stabilizer fixing member 13 are stacked in this order on the upper surface of the suspension member 1 (upper member 2) and fastened, the same rigidity increase and rigidity adjustment are performed. In this case, it is not necessary to form the raised portion 12c in the extended portion 12b.

<2> An embodiment in which the stabilizer 5 is provided on the lower surface of the suspension member 1, and in this case, the reinforcing piece 19 and the extended portion 12 b of the support bracket 12 with respect to the lower surface of the lower member 3 constituting the suspension member 1. The weld nut 17 and the bolt 18 attached in two places on the inner surface of the lower member 3 are stacked in the order of the stabilizer fixing member 13 or in the order of the extending portion 12b of the support bracket 12, the reinforcing piece 19, and the stabilizer fixing member 13. It can be fastened by.

<3> When implemented in a vehicle configuration in which the stabilizer 5 is not provided in the front structure, as shown in FIG. 8, the extension is provided without inserting the reinforcing piece 19 on the back surface of the extension 12 b of the support bracket 12. The outer peripheral portion of the portion 12 b is welded to the upper surface of the upper member 2. By carrying out in such a form, a raised portion is originally formed from a through hole provided in the extended portion 12b for allowing the bolt 18 to be inserted, or a gap between the outer side of the extended portion 12b of the support bracket 12 and the upper member 2. Since the coating liquid for electrodeposition coating easily enters the space on the back surface of 12c, rust prevention treatment is easily performed.

  The present invention can be applied not only to a front structure of an FF vehicle in which a stabilizer is attached to a suspension member, but also to a front structure of an FR (front engine / rear drive system) vehicle having a similar structure. .

1 Suspension member 2 Upper member (upper plate)
2b Vertical wall 3 Lower member (lower plate)
4 Side member 5 Stabilizer 6 Lower arm 7 Stay member 12 Support bracket 12b Extension part 12c Raised site 13 Stabilizer fixing member 19 Reinforcing piece

Claims (1)

A suspension member that is supported by the left and right side members, and is configured to be hollow by joining the upper plate member and the lower plate member,
A stabilizer fixed to both ends of the upper surface or the lower surface of the suspension member by a stabilizer fixing member attached to the suspension member;
In the vehicle front structure comprising a lower arm supported by the suspension member by a support bracket attached to the suspension member,
Extending and fixing a part of the support bracket to the position of the stabilizer fixing member,
A vertical wall surface portion is formed on the left and right lateral sides of the suspension member, and the stabilizer fixing member is provided in the vicinity of the vertical wall surface portion on the upper surface or the lower surface of the suspension member,
On the surface of the suspension member on the side where the stabilizer is provided,
The reinforcing piece made of a rust-proof steel plate, the extended portion of the support bracket, the stabilizer fixing member in this order, or
The extended portion of the support bracket, the reinforcing piece, and the stabilizer fixing member are in this order,
Installed in layers, and
The suspension member, the reinforcing piece, the extending portion of the support bracket, and the stabilizer fixing member are fastened by a common bolt that passes through the suspension member, a nut corresponding to the bolt, and the front of the vehicle. Part structure.

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