JPH01275205A - Vehicle suspension device - Google Patents

Abstract

PURPOSE:To enhance the rigid strength against lateral load of the vehicle body, by arranging first and second support parts of a longitudinally bifurcated suspension arm on a cross member and on an auxiliary member on an extension of the cross member, respectively. CONSTITUTION:A curved part 1a is formed in one sine end part of a front cross member 1. Further, an auxiliary member 2 is secured on the outside of the curved part 1a. Meanwhile, a support part 30 is arranged in the forward end part of a first bracket located below the cross member 1. The inner end part of a front side first arm 32 of a longitudinally bifurcated lower arm 31 is supported to the support part 30 through the intermediary of a rubber bushing 35. A plurality of support parts 36a, 36b are formed in the lower end part of an extension member 8 located outside of the auxiliary member 30, piercing through both front and rear surfaces thereof. Further, the inner end part of a rear side second lower am 37 is formed between the support parts 36a, 36b through the intermediary of a rubber bushing 38.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a suspension device for a vehicle.

(Prior Art) Conventionally, as a suspension device for a vehicle, first and second suspensions that respectively support the inner end portions of suspension arms that branch into the front and rear, as disclosed in Japanese Utility Model Application Publication No. 60-34903, have been used. Among the arm support parts, the first suspension arm support part is provided on a cross member extending in the vehicle width direction, and the second suspension arm support part is provided on an auxiliary member joined to the cross member and extending in the front-rear direction. is known.

The cross member and the auxiliary member constitute a suspension support member.

(Problem to be Solved by the Invention) However, the above-mentioned auxiliary member simply extends in the front-rear direction with respect to the cross member and provides a second suspension arm support portion so as to correspond to the two inner ends of the suspension arm. Therefore, when a load is applied to the second suspension arm support portion of the auxiliary member in the left-right direction of the vehicle from the wheel side via the suspension arm during cornering, this load is supported only by the auxiliary member. , the auxiliary member (second suspension arm support part) is weak against loads from the left and right directions of the vehicle body, and the rigidity of the suspension support member consisting of the cross member and the auxiliary member is weak against loads from the right and left directions of the vehicle body. There was a problem that it became weak against load.

The present invention has been made in view of the above points, and its purpose is to improve the rigidity of the suspension support system from the left and right directions of the vehicle body by improving the arrangement of the suspension arm support parts provided on the auxiliary members. This is intended to increase the load relative to the load.

(Means for Solving the Problems) In order to achieve the above object, the solving means of the present invention is such that the first and second suspension arm support parts that respectively support the inner ends of the suspension arms that branch into the front and rear are A suspension system of a vehicle is provided on a cross member extending in a direction. A curved portion that curves forward or backward is formed at the side end of the cross member, and a substantially triangular auxiliary member is fixed to the outside of the curved portion. Further, the first suspension arm support portion of the suspension arm is provided on the cross member, and the second suspension arm support portion of the suspension arm is provided on an auxiliary member on an extension line of the cross member.

(Function) With the above configuration, in the present invention, the second suspension arm support portion is provided on the auxiliary member on the extension line of the cross member, so that it acts in the left-right direction of the vehicle body from the wheel side via the suspension arm during cornering. Second to do
Suspensioner.

The load on the arm support portion is transmitted to the cross member, which has high rigidity and strength and is disposed in a direction that substantially coincides with the direction in which the load is applied.

(Example) Embodiments of the present invention will be described below based on the drawings.

1 to 3 show a vehicle suspension device according to an embodiment of the present invention applied as a front suspension device, and 1 is a front cross member (only the left side portion of the vehicle body is shown in the figure), The front cross member 1 is disposed to extend in the left-right direction of the vehicle body, and is attached to the vehicle body 4 (described later) at the upper surface on the lateral side of the center.

A curved portion 1a that curves forward is formed at the side ends (left and right ends) of the front cross member 1, and the outside (upper side in FIG. 2) of the curved portion 1a is formed in a plan view. A substantially triangular auxiliary member 2 is fixed by welding. Further, a first bracket 3 having a substantially hook-shaped cross section and whose outer side extends in the front-rear direction is fixed to the lower surface of the front cross member 1 by welding. The lower edge of the auxiliary member 2 is joined by welding. The front cross member 1 and the auxiliary member 2, where the front and rear ends of the first bracket 3 are located, have first and second through holes that pass through the respective flange surfaces of both members 1.2 and the first bracket 3. 5 or 6 are formed. Bolts are inserted through the through holes 5 and 6 via elastic members (not shown), and both members 1 and 2 and the first bracket 3 are elastically fastened to the vehicle body 4 by these bolts.

Further, the auxiliary member 2 and the first bracket of the first bracket 3
．． Approximately U-shaped recesses 7 and 7 recessed inward (towards the vehicle body) are formed on the outer surface of the approximately intermediate portion between the second through holes 5 and 6, respectively, and in the four portions 7 of the first bracket 3, A lower flange 7a whose lower end extends from the recess 7 to the lower end of the first bracket 3 is provided. The lower inner surface of an extending member 8 having a substantially U-shaped cross section and extending upward in an upright manner is fixed to each of the four parts 7 and the lower flange 7a of the auxiliary member 2 and the first bracket 3 by welding. There is. The front cross member 1, the auxiliary member 2, the first bracket 3, and the extension member 8 constitute a suspension support member 9.

At the outer end where the upper part of the extension member 8 is located, a second bracket 10 is provided as a reinforcing member that conforms to the shape of the outer end surface.
or fixed by welding. A first upper arm support part 11 and a second upper arm support part 12 each having a circular hole shape and passing through the extension member 8 in the front-rear direction are formed at the upper ends of the front and rear surfaces of the second part of the extension member 8, respectively. has been done. The inner end of the first upper arm 14 on the front side of the upper arm 3 which branches back and forth is attached to the first upper arm support part 11 located on the front side of the upper part of the extension member 8 via the first rubber bushing 5. It is being The first rubber bushing 15 includes an outer cylinder] 5a, an inner cylinder 15b located inside the outer cylinder 15a, and the outer cylinder 15a and the inner cylinder 15.
b, and an elastic body 15c inserted between the elastic body 15c and the elastic body 15c. on the other hand,
An inner end portion of a rear second upper arm 17 is attached to a second upper arm support portion 12 located on the rear side of the upper portion of the extending member 8 via a second rubber bush 18 . and the first and second upper arms 14.17.
The outer cylinders 15a, 18a of each of the rubber bushes 1.5.18 are fixed by welding to the inner end of the first rubber bushing 1.5.18.
The inner end of the second upper arm 14.17 is connected to each inner cylinder 15b via the elastic body 15c, ], 8c of each rubber bush 15, 18.

By fastening one long bolt 19 inserted into 1 and 8b, the first and second upper arm support portions 11 and 1.2 of the extension member 8 are sandwiched back and forth and elastically pivotally connected. has been done.

Further, a third rubber bushing 20 and a fourth rubber bushing 21 are provided at the upper ends of the extending member 8 and the second bracket 10 so as to be located approximately in the front and back. 3rd above
The rubber bushing 20 (only one will be explained as it has the same structure) includes an outer cylinder 20a whose outer peripheral surface is fixed to the upper ends of the extending member 8 and the second bracket 10 by welding, and It is composed of an elongated inner cylinder 20b, and an elastic body 20c that is fitted between the outer cylinder 20a and the inner cylinder 20b and pushes the inner cylinder 20b upward. Furthermore, a first fastening bolt 2 is provided on the inner peripheral surface of the inner cylinder 20b of the third rubber bushing 20.
A threaded portion 23 is formed into which 2 can be screwed together. and,
The inner cylinder 20 is biased into two parts by the elastic body 20c.
The upper end surface of b is pressed against the mounting surface 4a of the vehicle body 4 located above the third rubber bushing 20, and the inner cylinder 2
With the upper end surface of 0b pressed against the mounting surface 4a of the vehicle body 4, the inner cylinder 20b is fastened without twisting as the first fastening bolt 22 rotates, and the extending member 8 and the second bracket 10 are fastened together. It is elastically attached to the vehicle body 4 via a third rubber bush 20.

A tenth arm support portion 3 is provided at the front end of the first bracket 3 located below the front cross member 1.
0 (first suspension arm support part) is provided, and the inner end of the 10th arm 32 on the front side of the lower arm 31 that branches into the front and back is connected to the 10th arm support part 30 via a fifth rubber bushing 33. installed. The outer cylinder 33a of the fifth rubber bushing 33 is fixed to the tenth arm support portion 30 with a fixing bracket 34, while a bolt member 35 is provided at the inner end of the tenth arm 32. By fastening the bolt portion 4A35 inserted into the inner cylinder 37b via the elastic body 33c of the fifth rubber bush 33, the inner end portion of the tenth arm 32 is elastically attached to the tenth arm support portion 30. Pivotally connected.

Further, 8 of the extending member located outside the auxiliary member 2 is
A 20th arm support H36a in the form of an elongated hole passing through the front and rear surfaces of the extension member 8 in the front-rear direction,
36b (second suspension arm support portion) is formed. The 20th arm support portion 3 of the extension member 8
6a and 36b are provided on the extension line l of the front cross member 1 disposed in the vehicle width direction, and between the 20th arm support parts 36a and 36b, there is a 20th arm on the rear side of the lower arm 31. The inner end of 37 is attached via a sixth rubber push 38. And the above 20th
At the inner end of the arm 37 is the sixth rubber pusher 3.
The 20th outer cylinder 38a is fixed by welding.
The 20th arm support portions 36a, 36b of the extending member 8 are tightened by the second fastening bolt 39 inserted into the inner cylinder 38b through the inner end of the arm 37 or the elastic body 38c of the sixth rubber bushing 38. They are elastically pivoted together. In this case, as mentioned above, 1. The second upper arm 14.17 and the first upper arm 14.17. The attachment (assembly) of the 20th arm 32.37 to the extension member 8 and the front cross member 1 is performed before the aforementioned front cross member 1 is attached to the vehicle body 4, and the assembly of the front cross member 1 to the vehicle body 4 is performed. Efforts are being made to improve workability.

Note that 40 is a wheel, and the wheel 40 is attached via a wheel support member 41 connected to the outer end of the upper arm 13° and the lower arm 31.

Therefore, in the above embodiment, the 20th arm support portion 3
6a and 36b are extension members 8 on the extension line 1 of the front cross member 1 arranged in the vehicle width direction (outside of the auxiliary member 2)
Therefore, the load applied to the 20th arm support portions 36a and 36b from the wheel side in the left-right direction of the vehicle body via the 20th arm 32 during cornering, etc., is approximately in the same direction as the direction in which the load acts. The suspension support member 9 has high rigidity and strength against loads from the left and right directions of the vehicle body.

Incidentally, in the above embodiment, the case where the present invention is used in the front cross member 1 has been described, but it goes without saying that the present invention may also be used in the rear cross member. Further, although the front cross member 1 is curved toward the front, it is of course possible to curve it toward the rear.

Further, in the above embodiment, a case where the present invention is applied to the lower arm 31 has been described, but the present invention can also be applied to an upper arm or an auxiliary member on an extension of a cross member in which a support portion of a suspension arm is provided.

(Effects of the Invention) As described above, according to the vehicle suspension device of the present invention, the first suspension arm support portion of the suspension arm that branches approximately forward and backward is connected to the cross member, and the second suspension arm support portion is connected to the cross member.
Since the suspension arm support portions are provided on each of the auxiliary members on the extension line of the cross member, the load applied to the second suspension arm support portion from the wheel side through the suspension arm in the left-right direction of the vehicle during cornering is reduced. The load is effectively transmitted to the cross member, which has high rigidity and strength and is arranged in a direction that substantially coincides with the direction in which the load is applied, resulting in a suspension support member that has high rigidity and strength against loads from the left and right directions of the vehicle body. Become.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a perspective view of a suspension support member viewed from the rear, FIG. 2 is a plan view of the suspension device, and FIG. 3 is a front view of the suspension device. 1...Front cross member, 1a...Curved L2.
... Auxiliary member, 3... First bracket, 8... Extension member, 30... Tenth arm support part, 31...
Lower arm, 32...10th arm, 36a, 36
b...20th arm support part, 37...20th arm, ■...extension line. Patent applicant: Mazda Motor Corporation representative
In front of the person 1) Buddha room
Tomoaki Nunami

Claims (1)

[Claims] (1) In a vehicle suspension device in which first and second suspension arm support portions that respectively support the inner ends of suspension arms that branch into the front and rear are provided on a cross member extending in the vehicle width direction, the side of the cross member The end portion is provided with a curved portion that curves toward the front or rear, and a substantially triangular auxiliary member is fixed to the outside of the curved portion, and the first suspension arm support portion of the suspension arm is provided with a substantially triangular auxiliary member. is provided on the cross member, and the second suspension arm support portion is provided on an auxiliary member on an extension line of the cross member.