JPH04107106U - vehicle suspension device - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a suspension device for a vehicle that can improve steering stability, ride comfort, and prevent brake judder at a high level. [Structure] A suspension arm that supports the wheel support member 19 on the vehicle body in a vertically movable manner is composed of a lower arm 3 and an upper arm 4. The upper arm 4 is composed of a first arm 10 extending substantially in the vehicle width direction and a second arm 11 extending substantially in the longitudinal direction of the vehicle body. A second arm 11 is attached to the vehicle body via a pillow ball 13.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a suspension device for a vehicle.

0002

[Prior art]

In recent vehicles, especially passenger cars, wheel support members can be moved up and down relative to the vehicle body. It has a lower arm and an upper arm as suspension arms that hold the The so-called double wishbone type is on the rise. This upper For wheels with wheels, it is possible to suppress changes in wheel camber or to use shock absorbers. This is advantageous in terms of eliminating bending force on the saw bar. And this app It is proposed that the power arm be composed of two arms with different extension directions. (Refer to Japanese Unexamined Patent Publication No. 58-67508).

0003

[Problem that the idea aims to solve]

By the way, how to set the upper arm depends on steering stability, ride comfort, and brakes. It has a big impact on rake judder. To improve steering stability, use wheels It is desirable to have an arrangement that can sufficiently resist the lateral force input from the upper It is advantageous to arrange the arm so that it extends as much as possible in the vehicle width direction. On the other hand, ride In order to improve the ground and prevent brake judder, it is necessary to reduce external forces input in the longitudinal direction of the vehicle. The upper arm should be extended in the longitudinal direction of the vehicle so that it can be effectively caught. It is advantageous to do so.

0004 In this way, the upper arm is placed in a way that increases handling stability and improves riding comfort. The requirements are different from the upper arm arrangement that can prevent brake judder. The problem is how to satisfy both of these demands at a high level. In order to satisfy both of these requirements, as described in the above publication, the upper arm The system is composed of two arms, and the extension directions of the two arms are different from each other. It is conceivable that the However, in order to fully satisfy the above requirements, Considering the prevention of interference with other parts located around the suspension arm, , the angle formed by the two arms becomes extremely large, and the two arms become close to each other. Their movements will interfere with each other, and you may not necessarily get the desired effect. The current situation is that it is not possible.

[0005] Therefore, the purpose of this invention is to improve steering stability, ride comfort, and brake judder. - Provides a vehicle suspension device that satisfies the prevention and prevention requirements at a high level. It's about doing.

[0006]

[Means to solve the problem]

In order to achieve the above purpose, the present invention (first invention) has the following configuration. It has been done. That is, The suspension arm that supports the wheel support member on the vehicle body in a vertically movable manner is the lower arm. In a vehicle suspension system consisting of a arm and an upper arm, The upper arm includes a first arm extending substantially in the vehicle width direction and a first arm extending substantially in the vehicle longitudinal direction. It consists of a second arm that extends the first arm is attached to the vehicle body via a pillow ball; It is structured like this.

[0007]

【Example】

Hereinafter, embodiments of the present invention will be described based on the drawings. In FIGS. 1 and 2, 1 is a suspension device; The front wheels 2 are supported so as to be movable up and down relative to the vehicle body. This suspension device 1 , is used for the left and right front wheels 2, but the left and right suspension devices 1 are constructed symmetrically. Therefore, the following description will focus on the right front wheel suspension device 1.

[0008] The suspension device 1 includes a lower arm 3 as a suspension arm, An upper arm 4 disposed above the lower arm 3 is provided. In this embodiment, the lower arm 3 has first and second lower arms, as shown in FIG. lower arms 5 and 6 are used, and the first lower arm 5 extends substantially in the vehicle width direction. The second lower arm 6 is located closer to the front of the vehicle body than the first lower arm 5. It is arranged so that it slopes toward the rear of the vehicle body as it goes outward in the vehicle width direction. Ru. The inner end of the first lower arm 5 is connected to a cross member 7 that is integrated with the vehicle body via a bush 8. The second lower arm 6 is rotatably attached to the lower arm 6, and the inner end thereof is attached to the At the front side of the vehicle body than the bush 8, the cross member 7 is rotated via the bush 9. The outer end of the second lower arm 6 extends in the longitudinal direction of the first lower arm 5. It is connected to the approximately middle portion via a bush. As a result, the first lower arm 5 , together with the second lower arm 6, can swing vertically around the respective bushes 8 and 9. It has become so.

[0009] The upper arm 4 includes a first upper arm 10 as a first arm and a second arm as a first arm. The second upper arm 11 is provided as a second arm. The first upper arm 10 is arranged approximately in the vehicle width direction above the first lower arm 5. The approximately intermediate portion in the longitudinal direction is shown in FIGS. 1 and 2. As shown, a damper 12 ( The imaginary line in FIG. 2 indicates the location of the lower end of the damper 12). It is curved in a convex manner toward the rear of the body. Of this first upper arm 10 The end portion is attached to the cross member 7 via a pillow ball 13. this As shown in FIG. 3, the pillow ball 13 is located at the inner end of the first upper arm, as is known. an outer cylinder 14 fitted into the outer cylinder 14, an inner cylinder 15 disposed inside the outer cylinder 14, and both cylinders 14. , 15, and an annular elastic body 16 disposed between the inner tube 15 and the inner cylinder 15. and a support shaft 17 that is the mounting side for the member 7. 1 The upper arm 10 is difficult to displace in the vehicle width direction, but the pillow ball 13 is As a center, it can not only swing vertically, but also in the longitudinal direction of the vehicle body (arrow in Figure 3). It can also be easily swung in the direction indicated by the mark.

0010 The second upper arm 11 extends substantially in the longitudinal direction of the vehicle body, as shown in FIG. As shown in FIGS. 1 and 2, the first upper A position higher than the first upper arm 10 on the rear side of the vehicle body than the arm 10. It is set to be. This second upper arm 11 has one end (in FIG. , left end) is located at an upper position on the outer end side of the first upper arm 10. On the other hand, the other end (the right end in FIG. 2) is closer to the vehicle body than the first upper arm 10. The second upper arm 11 is located at a far position on the rear side, and the other end of the second upper arm 11 is , is supported by the vehicle body (not shown) via a normal elastic bush 18. This is it The second upper arm 11 can swing vertically around the elastic bush 18. It is now possible to

[0011] Between the lower arm 3 and upper arm 4 and the front wheel 2, as shown in FIG. The knuckle arm 19 serving as a wheel support member extends substantially in the vertical direction. It is arranged as follows. This knuckle arm 19 is arranged in order from the lower side to the upper side. an outer end of the first lower arm 5, an outer end of the first upper arm 10, and It is connected to one end of the second upper arm 11 via a bush, respectively. The knuckle arm 19 is formed by connecting the connecting points of these three parts 5, 10, and 11. It is rotatable about an axis that extends substantially vertically. this knack A hub (not shown) is rotatably supported on the arm 19. Front wheel 2 is fixed. In this way, the suspension device 1 It is configured as a link type. In addition, in FIGS. 1 and 2, 20 indicates a connecting portion 21 extending from the knuckle arm 19. The tie rod 22 connected to is a stabilizer.

0012 Therefore, in the suspension device 1, as usual, the impact from the road surface is In addition to protecting the vehicle body from damage, the first upper arm 10 is The first upper arm 10 is arranged so as to extend in the direction, and the inner end of the first upper arm 10 is The first upper arm 1 is attached to the cross member 7 via the pillow ball 13. 0 is made difficult to displace in the vehicle width direction, so the lateral force input to the front wheels 2 On the other hand, the first upper arm 10 will sufficiently resist. For this reason, steering stability This means that you can improve your sexual performance.

[0013] Further, the second upper arm 11 is arranged to extend substantially in the longitudinal direction of the vehicle body. Therefore, this second upper arm 11 becomes strong against external forces in its longitudinal direction. Taking advantage of its unique shape, it can sufficiently absorb external forces that are input approximately in the longitudinal direction of the vehicle body. It turns out. This improves ride comfort and prevents brake judder. This means that you will be able to Moreover, in this embodiment, the height position of the second upper arm 11 is higher than that of the first upper arm. The front wheel 2 is set higher than the height of the arm 10 and is connected to the second upper arm 11. The moment length from the grounding point of Even if , is input, the force acting on the second upper arm 11 becomes smaller. For this reason, This is even more desirable in terms of improving riding comfort and preventing brake judder.

[0014] In addition, when considering further improvement of riding comfort, the second upper arm 11 is made elastic. It is desirable that the movement of the bushing 18 be relatively large in the longitudinal direction of the vehicle body ( (the bushing 18 is set to be relatively easily bent), the first upper arm 1 0 is attached to the cross member 7 via the pillow ball 13, and the first The upper arm 10 easily swings in the longitudinal direction of the vehicle body around the pillow ball 13. Therefore, the movement of the second upper arm 11 described above is not inhibited. will no longer occur. Therefore, even without sacrificing the aforementioned improvement in handling stability, This makes it possible to improve riding comfort and prevent brake judder.

[0015]

[Effect of the idea]

In the present invention configured as described above, the input to the wheel is transmitted by the first arm. This is preferable in terms of improving steering stability by sufficiently resisting the lateral forces caused by the vehicle. Also, the The two arms sufficiently absorb external forces input in the longitudinal direction of the vehicle and improve ride comfort. This is preferable in terms of the above and prevention of brake judder. In particular, in the present invention, the first arm is attached to the vehicle body via a pillow ball. Therefore, the first arm is aligned in the longitudinal direction of the second arm, that is, the direction of the vehicle. The body can easily swing in the front-back direction, so relatively large movements are required to improve riding comfort. The movement of the second arm, which requires As a result, improved steering stability, ride comfort, and prevention of brake judder are achieved at a high level. can be satisfied. It should be noted that setting the height position of the second arm higher than that of the first arm, that is, By increasing the moment length from the wheel grounding point of the second arm, the center of riding can be reduced. This is even more preferable in terms of ground clearance and prevention of brake judder.

[Brief explanation of drawings]

FIG. 1 is a diagram of a right front wheel suspension device viewed from the rear of the vehicle body.

FIG. 2 is a plan view of FIG. 1;

3 is an enlarged sectional view illustrating a pillow ball used in the first upper arm in FIG. 2. FIG.

[Explanation of symbols]

1 Suspension device 3 Lower arm 4 Upper arm 10 1st upper arm 11 2nd upper arm 13 Pillow ball 19 Knuckle arm

Claims (2)

[Scope of utility model registration request] 1. A vehicle suspension device in which a suspension arm that supports a wheel support member on a vehicle body in a vertically movable manner is composed of a lower arm and an upper arm, wherein the upper arm includes a first arm extending substantially in the width direction of the vehicle;
and a second arm extending substantially in the longitudinal direction of the vehicle body, the first arm being attached to the vehicle body via a pillow ball. 2. The device according to claim 1, wherein the second arm is set at a higher position than the first arm.