JPH0627496Y2 - Front suspension mounting structure of automobile - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Field of the Invention The present invention relates to a front suspension mounting structure of an automobile.

2. Description of the Related Art FIGS. 4 and 5 show a conventional structure in which a front side member 1 as a lower frame member at a front portion of a vehicle body is arranged in a joint manner from a lower surface of a dash lower panel 5 to a lower side surface of a hood ledge panel 6. Has been done. In the front side member 1, the member rear side portion 2 joined to the lower surface of the dash lower panel 5 and the member front side portion 3 joined to the side surface of the hood ledge panel 6 are offset in the vertical direction. The member rear side portion 2 and the member front side portion 3 are continuously formed via the kick-up portion 4. Since the front suspension extends in the vehicle width direction in the vicinity of the corner C where the front wall 3 of the member and the lower wall of the kick-up portion 4 are connected, the L-shaped bracket 7 is attached to the side wall of this connection.
The bracket 7 is joined and hung vertically, and a stabilizer 8 such as a front suspension is mounted and supported on the bracket 7.

This similar structure is disclosed in, for example, Japanese Utility Model Laid-Open No. 59-167067.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention Since the bracket 7 is joined to the side wall of the front side member 1, when the front member 3 of the member is crushed and deformed during a frontal collision of the vehicle, the bracket 7 does not serve as a projecting member and the member front member It is possible to smoothly bend and crush and deform the kick-up portion 4 from the corner C where the lower wall of the kick-up portion 4 and the kick-up portion 4 are connected to each other to secure the crush stroke of the front side member 1 and obtain the effect of absorbing the collision energy. it can. However, as described above, the bracket 7 is simply formed in an L-shape so as not to hinder the crush deformation of the kick-up portion 4 and is joined to the side wall of the member. Therefore, the suspension that acts in the vertical direction from the stabilizer 8 is suspended. There is room for improvement in input strength. Therefore, the present invention provides a front suspension mounting portion structure for an automobile, which does not hinder the crush deformation of the kick-up portion even slightly and can sufficiently oppose the suspension input acting in the vertical direction. It is a thing.

Means for Solving the Problem A bracket is laid across the lower wall corner of the kick-up portion that is continuous from the member rear side of the front side member to the member front side, and the front suspension is mounted and supported on this bracket. The bracket is formed by bending from the front and rear edge portions of the base portion,
The bracket main body having front and rear side walls joined to the slopes of the lower wall of the member front side and the kick up part and the front and rear arm portions joined to the corresponding front and rear side walls joined to the base part. A beam member is provided, and at least the front arm portion is formed by expanding in a substantially U-shape in a plan view so as to impart flexibility to input in the front-rear direction.

Action For the suspension input acting on the bracket in the vertical direction, the beam member receives a load in the shearing direction, which is advantageous in terms of strength, and prevents the bracket from being deformed. When the front portion of the front side member is crushed and deformed during a frontal collision of the vehicle, the arm portion of the beam member of the bracket that expands into a U-shape in plan view bends from the bent portion and bends the side wall of the bracket. Deformation is allowed, the bracket does not function as a bulging member, and the crushed deformation of the kick-up portion is not hindered.

Embodiment Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings by assigning the same reference numerals to the same parts as those of the conventional structure.

1 to 3, the front side member 1 is joined and arranged from the lower surface of the dash lower panel 5 to the lower side surface of the hood ridge panel 6, and from the member rear side portion 2 to the member front side portion of the front side member 1. A bracket 10 is laid across a corner C of the lower wall of the kick-up portion 4 which is continuous with 3, and a stabilizer 8 of a front suspension is mounted and supported on the bracket 10. The bracket 10 is bent from the front and rear edges of the base portion 12 and is formed upright, and the flange 13 a is formed on the lower wall of the member front side portion 3.
Front wall 13 and kick-up portion 4 joined together through
A bracket body 11 having a rear wall 14 that is joined to a slope of a lower wall via a flange 14a, and a beam member that is joined to the base portion 12 and butt-joined to the front and rear walls 13 and 14. And 15.

The beam member 15 includes a front arm portion 16 and a rear arm portion 17 which are spaced apart from the base portion 12 at the front and rear portions, and the ends of the front and rear arm portions 16 and 17 are connected to the front and rear walls 1 as described above.
3 and 14 are butted and joined. The beam member 15 is formed by joining two steel plate plates, and in this embodiment, the front arm portion 16 is expanded and formed into a planar U-shape, and the end thereof is butted to the front wall 13 and laser welded. Alternatively, it is arc-welded to have flexibility for inputting in the front-rear direction, while the rear arm portion 17 has a flange 17a bent at its end and superposed on the rear wall 14 for spot joining.
Reference numeral 18 denotes a base portion 12 below the front and rear arm portions 16 and 17.
The weld nut for mounting the stabilizer arranged above is shown. The stabilizer 8 is connected to the base portion 12 via the holder 20.
The weld nut 18 is screwed and fastened to the lower surface of the weld nut 18 by a bolt 19.

According to the structure of the above embodiment, the suspension input is transmitted through the stabilizer 8 to the base portion 12 of the bracket body 11.
The beam member 15 is joined to the base portion 12, and the front and rear arm portions 16 and 17 are joined and reinforced to the front and rear walls 13 and 14 to reinforce the suspension input. The member 15 receives in the shear direction, which is advantageous in terms of strength. Therefore, the bracket 10 is not deformed by the suspension input, and the stabilizer 8 can be reliably supported.

On the other hand, when the member front side portion 3 of the front side member 1 is crushed and deformed during a frontal collision of the vehicle, the front arm portion 16 of the beam member 15 of the bracket 10 is input by this front-back direction input.
However, the front wall 1 is bent from the bent portion as shown in FIG.
Allows 3 bending deformations. As a result, the bracket 10 does not function as a bulging member at the corner C, the kick-up portion 4 bends more smoothly than the corner C, and is deformed smoothly, so that the crush stroke of the front side member 1 is sufficiently increased. Can be secured.

In the above embodiment, only the front arm portion 16 of the beam member 15 is formed to be expanded in a U-shape in a plan view, but the rear arm portion 17 may be formed to be expanded in a U-shape in some cases so as to respond to input in the front-rear direction. It may have flexibility.

As described above, according to the present invention, the bracket extending over the lower wall corner of the kick-up portion of the front side member has a beam member for reinforcing the vertical input.
It is possible to prevent the bracket from being deformed by the suspension input, and to reliably support the front suspension. In addition, since the arm portion of the beam member is formed to expand into a U-shape in a plan view and has flexibility to input in the front-rear direction, when the vehicle collides in the front direction, the arm portion is input by the collision input in the front-rear direction. It does not bend from the bent part and function as a tension member. Therefore, it is possible to ensure a sufficient collapsing stroke and to exert a predetermined collision energy absorption effect without causing any trouble in the collapsing deformation starting from the bending of the corner of the kick-up portion. It has a great effect in practical use.

[Brief description of drawings]

1 is a side view showing an embodiment of the present invention, FIG. 2 is a perspective view of a bracket, FIG. 3 is a side view showing a deformed state of the bracket, and FIG. 4 is a side view showing a conventional structure. FIG. 5 is a sectional view taken along line VV of FIG. 1 ... Front side member, 2 ... Member rear side part, 3 ... Member front side part, 4 ... Kick-up part, C ... Lower wall corner part, 8 ...
Front suspension (stabilizer), 10 ... Bracket, 11 ... Bracket body, 12 ... Base section, 13
... front wall, 14 ... rear wall, 15 ... beam member, 16 ... front arm part, 17 ... rear arm part.

Claims (1)

[Scope of utility model registration request] 1. A structure in which a bracket is laid across the lower wall corner of a kick-up portion that is continuous from the member rear side of the front side member to the member front side, and the front suspension is mounted and supported on this bracket. The bracket is formed by bending from the front and rear edge portions of the base portion, and is formed so as to rise, and is joined to the lower wall of the front portion of the member and the slope of the lower wall of the kick-up portion. And a beam member joined to the base part to join the front and rear arm parts to the corresponding front and rear side walls, and at least the front arm part is expanded and formed in a substantially U-shape in a plane direction. A front suspension mounting structure for an automobile, which is characterized by giving easy bending to input.