JP2763542B2 - Vehicle suspension device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a wishbone suspension device for a vehicle.

(Prior Art) In general, as a suspension device for a vehicle such as an automobile, outer ends of an upper arm and a lower arm are connected to upper and lower ends on a wheel side via ball joints, while inner ends of the upper arm and the lower arm. A wishbone type in which a part is connected to a vehicle body and wheels are suspended from the vehicle body is well known. In some cases, the inner end of the lower arm branches forward and backward and is connected to the vehicle body.

In the above suspension device, in order to improve the workability of assembling the upper arm and the lower arm to the vehicle body, for example, as disclosed in Japanese Utility Model Laid-Open No. 60-11807, a lower arm before and after supporting each inner end of the lower arm is disclosed. The vehicle body left and right direction (vehicle width direction) where the support parts are provided respectively
An extension member extending upward from the suspension support member (lower arm support portion near the center of rotation of the wheel) is joined to the suspension support member extending to the upper end of the suspension arm, and the upper end of the extension member has an inner end of the upper arm. An upper arm support portion for supporting the upper portion is provided. After the upper arm and the lower arm are assembled to the suspension support member and the extension member in advance, the lower arm support portion side (lower end portion) of the suspension support member has an elastic body. In some cases, the upper arm support portion side (upper end of the extension portion) is rigidly connected to the vehicle body while being attached to the vehicle body via the boss, thereby improving and simplifying the assembly workability.
In this case, the lower end surface of the extension member is fixedly joined to the upper surface of the side end portion of the suspension support member.

(Problems to be Solved by the Invention) However, in the above-described conventional suspension device, each inner end of the lower arm is supported by each lower arm support of the suspension support member, whereas the inner end of the upper arm is Since the suspension member is supported by an upper arm support portion provided on an extension member which is a separate member from the suspension support member, when the extension member is joined to the suspension support member and assembled, a positional shift between the two members and Accuracy is likely to decrease due to inclination or the like, and adjustment is required after assembling the extension member to obtain a desired camber angle with the two arms, and the positioning accuracy of the two arms is low.

The present invention has been made in view of such a point, and an object of the present invention is to improve the inner ends of the lower arm and the upper arm so as to be supported by the same member so that the desired camber angle between the two arms can be obtained. However, it is intended to improve the positioning accuracy of both arms by making it possible to easily obtain the adjustment after assembly without making it necessary.

(Means for Solving the Problems) In order to achieve the above object, a solution of the present invention is to provide an extension member extending upwardly joined to a suspension support member provided with a lower arm support portion for supporting a lower arm. In addition, it is assumed that the vehicle suspension device has an upper arm supporting portion for supporting the upper arm at the upper end of the extension member. The lower arm is supported by two lower arm support portions provided at two locations in the vehicle longitudinal direction, and the lower arm support portion of each of the lower arm support portions, which is closer to the center of rotation of the wheel, is a lower end of the extension member. The lower arm support near the center of rotation of the wheel and the upper arm support share an extended member.

(Operation) According to the present invention, one of the lower arm support portions, which is closer to the center of rotation of the wheel, extends from among the lower arm support portions that support the inner ends of the lower arm at two locations in the vehicle longitudinal direction. It is provided at the lower end of the member. In this case, since the upper end of the extension member is provided with an upper arm support that supports the upper arm, the inner ends of the upper arm and one of the lower arms are connected to the upper and lower ends of the extension member that is the same member. The upper arm support and the one lower arm support are supported by the provided upper arm support and the one lower arm support, respectively, and the extension member is shared by the upper arm support and the one lower arm support. For this reason, if the desired camber angle is set by the upper arm and one lower arm before the extension member is assembled, it is not necessary to adjust the desired camber angle by the upper arm and one lower arm after the extension member is assembled. Thus, a desired camber angle by both arms can be easily obtained.

Also, since a desired camber angle is obtained by the upper arm and one of the lower arms, the lower end of the extending member is unnecessarily extended in order to support the other lower arm far from the center of rotation of the wheel at the lower end of the extending member. No need.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

1 and 2 show a vehicle suspension apparatus according to an embodiment of the present invention applied as a front suspension apparatus, and 1 is a front cross member as a suspension support member (only the left side of the vehicle body is shown in the figures). The front cross member 1 is disposed so as to extend in the left-right direction of the vehicle body, and is attached to the vehicle body 4 (described later) at an upper surface lateral to the center. A first bracket 2 having a substantially hook-like cross section and an outer portion extending in the front-rear direction is fixed to a side end (the right side in the figure) of the front cross member 1 by welding. On the lower surface of the first bracket 2, a second bracket 3, which also serves as reinforcement and substantially matches the shape of the first bracket 2 in plan view, is fixed by welding. The front and rear ends of the first bracket 2 and the second bracket 3 are attached to the two brackets 2,
First and second through holes 5, 6 penetrating the third flange surface are formed. A bolt is inserted into each of the through holes 5 and 6 via an elastic member (not shown), and the first bracket 2 and the second bracket 3 are elastically fastened to the vehicle body 4 by the bolt.

In addition, the first bracket 2 and the second bracket 3
A substantially U-shaped recessed portion 7,7 recessed inward is formed on an outer surface of a substantially intermediate portion between the first and second through holes 5,6.
The lower end of the recess 7 of the bracket 3 is
A lower flange 7a reaching the lower end of the bracket 3 is provided. A lower inner surface of an extension member 8 having a substantially U-shaped cross section, which extends upward and extends upward, is fixed to each of the recesses 7 and the lower flange 7a of the first and second brackets 2 and 3 by welding. ing.

A third bracket 10 as a reinforcing member conforming to the shape of the outer end surface is provided at the outer end where the upper part of the extension member 8 is located.
Are fixed by welding. A first upper arm supporting portion 11 and a second upper arm supporting portion 12 each having a circular hole shape penetrating the extending member 8 substantially in the front-rear direction are formed at upper end portions of a front surface and a rear surface of an upper portion of the extending member 8, respectively. I have. The first upper arm support portion 11 located on the front side of the upper part of the extension member 8 has a first rubber bush 15 at the inner end of the first upper arm 14 in front of the upper arm 13 branching forward and backward.
Mounted through. The above first rubber bush 15
Is an outer cylinder 15a, and an inner cylinder 15b located inside the outer cylinder 15a.
And an elastic body 15 inserted between the outer cylinder 15a and the inner cylinder 15b.
c. On the other hand, the inner end of the second upper arm 17 on the rear side is attached to the second upper arm support portion 12 located on the upper rear side of the extension member 8 via a second rubber bush 18. And the first and second upper arms
At the inner end of 14,17, the outer cylinder of each rubber bush 15,18
15a, 18a are fixed by welding, and the inner ends of the first and second upper arms 14, 17 are connected to the rubber bush 15, 15, respectively.
The extension member 8 is fastened by fastening one long bolt 19 inserted into each of the inner cylinders 15c, 18c via the elastic members 15b, 18b of the 18th.
The first and second upper arm supporting portions 11 and 12 are elastically pivotally connected to each other.

Further, a third rubber bush 20 and a fourth rubber bush 21 are provided at upper ends of the extension member 8 and the third bracket 10 so as to be located substantially forward and backward. The above third rubber bush 20 (only one will be described because it has the same structure)
An outer cylinder 20a having an outer peripheral surface fixed to the upper end of the extension member 8 and the third bracket 10 by welding, an inner cylinder 20b formed longer in the cylinder direction than the outer cylinder 20a, and an outer cylinder 20a. And an elastic body 20c fitted between the inner cylinder 20b and the inner cylinder 20b to urge the inner cylinder 20b to protrude upward. Also,
A screw portion 23 to which a fastening bolt 22 can be screwed is formed on an inner peripheral surface of the inner cylinder 20b of the third burr bush 20. The inner cylinder 20b urged upward by the elastic body 20c
Of the inner cylinder 20b is pressed against the mounting surface 4a of the vehicle body 4 while the upper end surface of the inner cylinder 20b is pressed against the mounting surface 4a of the vehicle body 4 located above the third rubber bush 20. Cylinder 20
b is fastened without being twisted with the rotation of the fastening bolt 22, and the extending member 8 and the third bracket 10 are elastically attached to the vehicle body 4 via the third rubber bush 20.

Then, the extension member 8 close to the center of rotation of the wheel (not shown)
At the lower end portion, first elongated arm support portions 30a and 30b are formed, which penetrate the front and rear surfaces of the extension member 8 in the front-rear direction. The first lower arm support portion of the extension member 8
The inner end of the first lower arm 32 on the rear side of the lower arm 31 branching back and forth is mounted via a fifth rubber bush 33 between 30a and 30b. The fifth rubber bush 33,
It comprises an outer cylinder 33a, an inner cylinder 33b located inside the outer cylinder 33a, and an elastic body 33c inserted between the outer cylinder 33a and the inner cylinder 33b. And, at the inner end of the first lower arm 32,
The outer cylinder 33a of the fifth rubber bush 33 is fixed by welding, and the inner end of the first lower arm 32 is inserted into the inner cylinder 33b via the elastic body 33c of the fifth rubber bush 33. By the fastening of 34, the first lower arm support portions 30a and 30b of the extension member 8 are elastically pivotally connected to each other. In this case, the first lower arm support portions 30a and 30b and the first upper arm support portion 11 and the second upper arm support portion 12 share the extension member 8.

The inner end of the second lower arm 35 on the front side of the lower arm 31 is connected to a second lower arm support 36 formed at the front end of the first bracket 2 and the second bracket 3 far from the center of rotation of the wheel by a sixth rubber. It is mounted via a bush 37. The outer cylinder 37a of the sixth rubber bush 37 is fixed to the second lower arm support portion 36 by a fixing bracket 38, and a bolt member 39 is provided at the inner end of the second lower arm 35. , 6th rubber bush 37
Bolt member inserted into the inner cylinder 37c via the elastic body 37b
By the fastening of 39, the inner end of the second lower arm 35 is elastically pivotally connected to the second lower arm support 15. In this case, the first and second upper arms 14, 17 and the
1, mounting (assembly) of the second lower arms 32, 35 to the extending member 8 and the front cross member 1 is performed before the above-described front cross member 1 is mounted to the vehicle body 4. Is improved.

Reference numeral 40 denotes a wheel, and the wheel 40 is
And a wheel support member connected to the outer end of the lower arm 31
Mounted via 41.

Therefore, in the above embodiment, the inner ends of the first lower arm 32 and the second lower arm 35 of the lower arm 31 are connected to the vehicle body 4.
Of the first and second lower arm support portions 30a, 30b, and 36 respectively supported at two positions in the front-rear direction, the first lower arm support portions 30a, 30b near the center of rotation of the wheel are provided at the lower end of the extension member 8. ing. In this case, the first and second upper arm supporting portions 11 for supporting the first and second upper arms 14 and 17 of the upper arm 13 via the first and second rubber bushes 15 and 18 are provided at the upper end of the extension member 8. , 1
2 provided, the first and second upper arms 1
4, 17 and the inner ends of the first lower arm 32 are the first and second members provided at the upper and lower ends of the extending member 8 which is the same member.
Upper arm supports 11, 12 and first lower arm supports 30a, 3
0b, and the first and second upper arm supports 11, 12 and the first lower arm supports 30a, 30b share the extension member 8. Therefore, when a desired camber angle is set by the first and second upper arms 14 and 17 and the first lower arm 32 before the extension member 8 is assembled,
After assembling the extension member 8, the first and second upper arms 14, 1
It is not necessary to adjust the desired camber angle by the 7 and the first lower arm 32, and the desired camber angle by each of the arms 14, 17, 32 can be easily obtained, thereby improving the positioning accuracy of the upper arm 13 and the lower arm 31. Can be.

Since a desired camber angle is obtained by the first and second upper arms 14 and 17 and the first lower arm 32, the second lower arm 35 far from the center of rotation of the wheel is supported at the lower end of the extension member 8. There is no need to unnecessarily extend the lower end of the extension member 8, and the weight of the front cross member 1 to which the extension member 8 is joined can be reduced.

In the above embodiment, the first cross member 1 has the first
Although the first and second brackets 2 and 3 are joined together, the front cross member and the first and second brackets may be formed integrally.

(Effects of the Invention) As described above, according to the vehicle suspension device of the present invention, one of the lower arm supports that supports the inner ends of the lower arms has one of the lower arm supports that is closer to the center of rotation of the wheel. The upper arm is provided at the lower end of an extending member having an upper arm supporting portion provided thereon, and the inner ends of the upper arm and one of the lower arms are supported by the upper and lower ends of the same extending member. The support portion and one of the lower arm support portions share the extension member. Accordingly, if the desired camber angle by the upper arm and one of the lower arms is set before assembling the extension member, the camber angle can be easily obtained without the need for adjustment after the assembling. The positioning accuracy of the arm can be improved. In addition, since the other lower arm far from the center of rotation of the wheel is supported at the lower end of the extension member, it is not necessary to extend the lower end of the extension member unnecessarily, thereby reducing the weight of the suspension support member. Can be.

[Brief description of the drawings]

1 is a front view of a suspension device, and FIG. 2 is a plan view of the suspension device. 1 front cross member (suspension support member) 2 first bracket 3 second bracket
8 ... extension member, 11 ... 1st upper arm support part, 12 ...
… Second upper arm support part, 13 …… upper arm, 14…
... 1st upper arm, 17 ... 2nd upper arm, 30a, 30
b: 1st lower arm support part, 31 ... Lower arm, 32 ...
... 1st lower arm, 35 ... 2nd lower arm, 36 ... 2nd
Lower arm support.

────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Haruyuki Taniguchi 3-1 Shinchi, Fuchu-cho, Aki-gun, Hiroshima Prefecture Inside Mazda Co., Ltd. (56) References Shiro 60-11806 (JP, U) Shiro 60 -11207 (JP, U) Fully open 60-34903 (JP, U) Fully open 63-9908 (JP, U) Fully open 63-19409 (JP, U) Fully open 60-29707 (JP, U (58) Field surveyed (Int.Cl. ⁶ , DB name) B60G 3/20

Claims (1)

(57) [Claims] 1. An upper arm support for supporting an upper arm at an upper end of an extension member extending upwardly from a suspension support member provided with a lower arm support portion for supporting the lower arm. In the vehicle suspension device provided with the portion, the lower arm is supported by each lower arm support portion provided at each of two places in the vehicle longitudinal direction, and the lower arm support portion is close to the rotation center of the wheel. A vehicle suspension device wherein a lower arm support is provided at a lower end of the extension member, and the lower arm support near the center of rotation of the wheel and the upper arm support share the extension member.