JPH04135805U - vehicle suspension device - Google Patents

Abstract

(57) [Summary] [Purpose] The lower arm 11 is
By improving the lower arm 11 so that the lower arm 11 is reliably supported and the side frame is smoothly buckled between the front and rear support parts 12 and 13 of the lower arm 11,
The purpose is to maintain good wheel alignment while expanding the crash space in the event of a frontal collision. [Configuration] For the side frame that extends in the longitudinal direction of the vehicle,
The lower arm 11, which is approximately A-shaped in plan view, is the front support portion 1.
The present invention is based on a suspension system for a vehicle that is supported by a rear support section 2 and a rear support section 13, respectively. The lower arm 11 is provided with a low-rigidity portion 26 having lower rigidity than the rear support portion 13.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention relates to a vehicle suspension system, and is particularly useful for preventing crashes in frontal collisions. Concerning measures to expand the space.

0002

[Conventional technology]

Generally, in a vehicle suspension system, a vehicle body flap that extends in the longitudinal direction of the vehicle body is used. The suspension arm, which is approximately A-shaped in plan view, is directly connected to the frame at two points, front and rear. The rigidity of the vehicle body frame between the front and rear support parts of the suspension arm It has high strength.

0003 Therefore, in the past, as disclosed in, for example, Japanese Utility Model Application No. 56-21210, Move the rear support part of both the front and rear support parts supported against the body frame backward by a predetermined amount. A movable support has been proposed. And in this case, the front When a collision load acts on the vehicle body frame during a collision, the rear support of the suspension arm The holding part moves rearward and the vehicle body flexes between the front and rear support parts of the suspension arm. -In order to weaken the rigidity of the suspension arm, the distance between them has been widened to reduce the rigidity of the suspension arm. Enables the body frame to buckle between both supporting parts, reducing the possibility of a crash in the event of a frontal collision. I'm trying to maintain a good pace.

0004

[Problem that the idea aims to solve]

However, in the above-mentioned conventional model, the Since the movement of the The spacing between the front and rear support parts of the suspension arm is increased, increasing rigidity. The strength will be weakened, and the buckling of the vehicle body frame in the event of a frontal collision will be restricted. , it is not possible to secure enough crash space in the event of a head-on collision.

[0005] In addition, in the conventional suspension device mentioned above, the suspension arms are Since the structure is such that only the front support section supports the load acting from the opposite direction, There is also a risk that the wheels may become out of alignment when driving over bumps in the road.

[0006] The present invention was devised in view of these points, and its purpose is to The suspension arm is securely supported by both its front and rear support parts, and the suspension arm is The suspension is designed to ensure smooth buckling of the body frame between the front and rear support parts of the arm. By improving the pension arm, it is possible to maintain good wheel alignment. , which aims to expand the crash space in the event of a head-on collision.

[0007]

[Means to solve the problem]

In order to achieve the above objective, the solution taken by the present invention is to extend in the longitudinal direction of the vehicle body. There are two suspension arms in the front and rear that form an A-shape when viewed from above relative to the vehicle body frame. This assumes a vehicle suspension system that is supported by a vehicle. And above The suspension arm has more rigidity and strength than its rear support to the vehicle body frame. The structure is such that a low-rigidity portion is provided.

[0008]

[Effect]

With the above configuration, the present invention allows collision energy to be absorbed by the vehicle body during a head-on collision. - When the buckling occurs at the front end of the vehicle body frame, the suspension - The buckling or impact energy applied to the front support of the This creates a low-rigidity part that has lower rigidity than the rear support part of the suspension arm. The rigidity of the vehicle body frame between the front and rear support parts of the suspension arm was damaged. The buckling of the vehicle body frame during a frontal collision is regulated by the lower arm. continues without being affected.

[0009] In addition, unlike conventional suspension arms, the rear support part is attached to the vehicle body frame. It is not necessary to adopt a structure that allows the support to move a predetermined amount rearward with respect to the arm, and it is possible to It is possible to adopt a configuration in which both the front and rear support parts can reliably support the load acting from the Wheel alignment will not go out of order when driving over bumps in the road.

0010

[Effect of the idea]

As described above, according to the vehicle suspension device of the present invention, Both the front and rear support parts reliably support the load acting on the vehicle, while the suspension is By actively damaging the low-rigidity part of the arm, a Improves wheel alignment by smoothing the buckling of the vehicle body frame It is possible to expand the crash space in the event of a head-on collision while maintaining the

[0011]

【Example】

Hereinafter, embodiments of the present invention will be described based on the drawings.

0012 Figures 3 to 5 show the front suspension system of the suspension device according to the embodiment of the present invention. The figure shows the front left side of a car applied as a suspension device, where 1 is the car body and 2 is the side end of the car body. A side frame as a vehicle body frame that extends in the front and rear direction. The door frame 2 has a NO1 cross member 3 and a NO2 cross member extending in the vehicle width direction. The bar 4 and NO3 cross member 5 are connected in order from the front, and are formed at the front of the vehicle body. It forms the bottom surface of the engine room 6. In addition, the above NO2 cross member 4 and The side ends of the NO3 cross member 5 extend upward from the bottom of the side frame 2. It is bent so as to extend and connect to the front and rear positions of the vehicle body frame 2, respectively. . Note that 7 is the engine installed in engine room 6, and 8 is the engine located in front of engine 7. The installed radiator 9 is a condenser placed in front of the radiator 8.

[0013] In addition, the NO2 cross member 4 and N02 cross member 4 corresponding to the lower side of the side frame 2 are The O3 cross member 5 is equipped with a suspension arm that is approximately A-shaped in plan view. The front and rear inner ends of the lower arm 11 are connected through the front and rear support parts 12 and 13, respectively. It is supported so that it can swing freely. The front and rear support portions 12 and 13 are constructed using known methods. A first rubber bush 14 consisting of an inner cylinder, an outer cylinder, and an elastic body interposed therebetween. , 14. In addition, the above NO2 cross member 4 and NO3 cross member 5 The approximately middle part corresponds to the side frame 2, and the NO3 cross member 5 corresponds to it. The side frame 2 is provided with brackets 15, 15 that protrude upward. , each of these brackets 15 has a shape that is substantially A-shaped when viewed from above, and is larger than the lower arm 11. The front and rear inner ends of the small upper arm 16 each have a common axis X. It is swingably supported via bar bushes 17, 17. And the above lower The outer end of the arm 11 is the lower end of the wheel support member 19 that rotatably supports the wheel 18. The outer ends of the upper arms 16 swing against the upper ends of the wheel support members 19, respectively. freely supported. In this case, the front support part 12 and the rear support part 13 are The side frame 2 is firmly supported by the frame 2 and is supported by the lower arm 11. By being reinforced by The rigidity and strength of the side frame 2 is increased.

[0014] As shown in FIGS. 1 and 2, the lower arm 11 is connected to the wheel support member 1. 9, which has a wheel side support section 21 for the lower end of the front side support section 9 and extends toward the front side support section 12 side. - the arm portion 22 and the rear side arm extending from the vicinity of the wheel side support portion 21 to the rear side support portion 13 side. - branched into a room section 23. At this branch part 24, the front arm part 22 is cut off. It is formed in a substantially U-shape, and the rear arm portion 23 is located inside the front arm portion 22. The outer end portion is disposed and passes through the front arm portion 22 and the rear arm portion 23 from the vertical direction. It is fastened by two bolt members 25, 25. In this case, lower arm 1 The branch part 24 of the front arm part 22 and the rear arm part 23 of 1 is connected to its side frame. A low-rigidity portion 2 that is lower than the support rigidity strength (rigidity strength) of the rear side support portion 13 with respect to the arm 2 6.

[0015] Therefore, in the above embodiment, the collision energy is - When the buckling is applied to the lower arm 2, buckling starts from the front end of the side frame 2. If the front support part 12 of 11 is reached, the buckling or collision effect will occur in low rigidity, which is lower than the rear support portion 13 of the lower arm 11 due to The front arm part 22 and the rear arm part 24 are formed as a sex part 26 at the branch part 24. One of the two bolt members 25, 25 that fastens the arm part 23 is at least sheared. (damaged) and the side flange between the front and rear support parts 12 and 13 of the lower arm 11 -The rigidity of the frame 2 is weakened, and the buckling of the side frame 2 during a frontal collision is lower. It continues without being regulated by arm 11. As a result, the crash during a frontal collision Rush space can be expanded.

[0016] In addition, the lower arm 11 has its rear support portion attached to the vehicle body frame as in the conventional one. It is not necessary to adopt a structure in which the support can be moved a predetermined amount rearward, and it can act from the front and rear directions. Adopt a strong structure to ensure that both the front and rear support parts 12 and 13 support the load. This allows the wheels to maintain good alignment even when going over bumps in the road. be able to.

[0017] Note that the present invention is not limited to the above-mentioned embodiments, and includes various other modifications. It includes. For example, in the above embodiment, the front arm part Low rigidity consisting of two bolt members 25, 25 that fasten the 22 and rear arm part 23. However, as shown in FIG. 6, the front arm portion 22 of the lower arm 11 is The support rigidity of the rear support portion 13 of the lower arm 11 is located approximately in the middle of the rear arm portion 23. Low rigidity is achieved by providing step portions 31 and 31, respectively, where the rigidity strength is lower than the rigidity strength. It may also be used as the sexual part 26. In this case, the impact energy that acts during a head-on collision, etc. Therefore, the buckling that starts from the front end of the side frame occurs at the front support portion 1 of the lower arm 11. 2, the step part of the front arm part 22 and the rear arm part 23 of the lower arm 11 31, 31, and both the front and rear support portions 12, 1 of the lower arm 11 are twisted. The rigidity of the side frame between 3 and 3 is weakened, and the side frame is The buckling of the frame 2 continues without being regulated by the lower arm 11, resulting in a frontal collision. It is possible to expand the crash space in the event of an emergency.

[0018] Furthermore, in the above embodiment, the low-rigidity portion 26 was formed only in the lower arm 11; Of course, it may also be formed on the upper arm.

[0019] Furthermore, in the above embodiment, the front arm portion 22 and the rear arm portion of the lower arm 11 23 to the NO2 cross member 4 and the NO2 cross member 4 corresponding to the lower part of the side frame 2. 3. Although it was supported on cross member 5, the front arm and rear arm of the lower arm It may be directly supported by the side frame.

[Brief explanation of drawings]

FIG. 1 is a plan view of a lower arm.

FIG. 2 is a sectional view of the lower arm taken near the bolt member.

FIG. 3 is a plan view showing the left front part of the automobile.

FIG. 4 is a front view according to FIG. 3;

FIG. 5 is a side view according to FIG. 3;

FIG. 6 is a perspective view of a lower arm showing a modification.

[Explanation of symbols]

2 Side frame (body frame) 11 Lower arm (suspension arm) 13 Rear support part 26 Low rigidity part

Claims (1)

[Scope of utility model registration request] 1. A suspension device for a vehicle in which a suspension arm, which is approximately A-shaped in plan view, is supported at two points in the front and rear with respect to a vehicle body frame extending in the front-rear direction of the vehicle. - A suspension device for a vehicle, characterized in that the frame is provided with a low-rigidity portion having lower rigidity than a rear support portion for the vehicle body frame.