KR20090060808A

KR20090060808A - Suspension system of vehicle

Info

Publication number: KR20090060808A
Application number: KR1020070127745A
Authority: KR
Inventors: 문하경
Original assignee: 현대자동차주식회사
Priority date: 2007-12-10
Filing date: 2007-12-10
Publication date: 2009-06-15

Abstract

The present invention relates to a suspension device for a vehicle, wherein the portion of the vehicle module (3) corresponding to the body of the vehicle when the vehicle is turning the vehicle located inward of the turning radius induces the downward movement toward the ground, turning radius By inducing the upward movement, the portion positioned inwardly can greatly improve turning stability and adjustment stability, and also improves riding comfort.

Description

Suspension system of vehicle

The present invention relates to a suspension device for a vehicle, and more particularly, to a suspension device for a vehicle which can improve turning stability by guiding a center of gravity of a vehicle in turning inward of a turning radius.

In general, the suspension device of the vehicle is a device that prevents damage to the vehicle body and cargo and improves the riding comfort by preventing the vibration or shock received from the road surface to be directly transmitted to the vehicle body when driving by connecting the axle and the vehicle body.

The suspension device serves to maintain straight stability when driving the vehicle straight and to maintain turning stability when turning the vehicle, while maintaining the stability of adjustment.

On the other hand, when the vehicle is turning in any direction, the center of gravity (M1) of the vehicle is moved to the outside of the turning radius (R1) as shown in Figure 1 by the centrifugal force.

Accordingly, the portion of the body 1 of the vehicle positioned inward of the turning radius R1 rises as shown by the arrow P1, and conversely, the portion of the body 1 located outside of the turning radius R1. Is lowered as shown by arrow P2.

As such, when the body 1 portion located outside of the turning radius R1 descends as the vehicle moves in the center of gravity M1 of the vehicle while turning, the turning stability and adjustment stability are greatly reduced, resulting in an accident. There is a fear of occurrence, and also causing a deterioration of ride comfort, a problem that the occupant feels anxious.

In order to prevent this, the development of a device for suppressing the movement of the vehicle's center of gravity (M1) to the outside of the turning radius (R1) during the turning drive is progressing, but most of the configuration by the electronic control or hydraulic and pneumatic control Due to the configuration, there is a problem that the cost of the device is expensive and difficult to apply.

Accordingly, the present invention proposes a suspension device of a mechanical configuration, which is relatively simple in construction and can be developed at low cost, so that when the center of gravity of the vehicle moves outside the turning radius during turning, Inwardly located parts are guided to move downward toward the ground, and on the contrary, parts located outward of the turning radius of the body are guided to move upward, thereby improving turning stability and adjusting stability as well as improving riding comfort. The purpose is to make it possible.

Suspension device of the present invention for achieving the above object, the front member and the top member is fixedly coupled to the lower portion of the body module to the passenger boarding including a rear side member; A lower member fixedly coupled to an upper portion of a lower chassis module except the body module; Spaced apart along the longitudinal direction of the upper and lower members, each end including a first side member and a second side member rotatably coupled to the upper and lower members via upper and lower hinge axes, respectively; The first and second side members are configured to have a spacing between the upper and lower hinge shafts is smaller than the spacing between the lower and lower hinge shafts.

In the suspension device according to the present invention, the portion of the body module corresponding to the body of the vehicle when the vehicle is turning, the portion located inside the turning radius induces the downward movement toward the ground, the portion located inside the turning radius By inducing the upward movement, it is possible to greatly improve the swing stability and adjustment stability, and also has the effect of improving the riding comfort.

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the present invention.

According to an embodiment of the present invention, when the vehicle's center of gravity moves toward the outside of the turning radius as the vehicle moves, the portion of the body module located inside the turning radius moves downward toward the ground, and conversely, the body module The part located outward of the turning radius is a technique regarding suspension which guides upward movement.

Suspension device according to an embodiment of the present invention for realizing this, as shown in Figure 2, the top member 10 is fixedly coupled to the lower portion of the body module 3, the passenger boarding is made, except the body module 3 The lower member 20 fixedly coupled to the upper portion of the lower chassis module 5 and the upper and lower members 10 and 20 are spaced apart along the longitudinal direction of both ends of the upper and lower members 10 and 20. Each of the first side member 30 and the second side member 40 rotatably coupled to each other via the upper hinge shafts 31 and 41 and the lower hinge shafts 33 and 43.

The body module 3 includes a front side member and a rear side member. The upper member 10 is fixedly coupled to the bottom surface of the front side member when the front side and the rear side member when the rear side. It is fixed to the bottom of the configuration.

In addition, the body module 3 according to an embodiment of the present invention may be interpreted in the same concept as the body 1 described above with reference to FIG. 1.

In addition, the chassis module 5 is a portion other than the vehicle body module 3, and the front side includes a subframe in which the knuckle and the front wheel are coupled, and the rear side the torsion beam axle in which the rear wheel is coupled. This corresponds to this.

Accordingly, the lower member 20 is fixedly coupled to the upper surface of the subframe in the front and fixed to the upper surface of the torsion beam axle in the rear.

Meanwhile, the subframe and the torsion beam axle may not be limited to any one component because other components may correspond to the vehicle model.

In addition, in the first and second side members 30 and 40 according to the present invention, the distance L1 from the upper hinge shafts 31 and 41 is the distance L2 from the lower hinge shafts 33 and 43. It is configured to have a spacing smaller than), more specifically, the distance (L1) with the upper hinge axis (31, 41) is at least 80 percent (to the distance (L2) with the lower hinge axis (33, 43) %) To a maximum of 90 percent (%).

Hereinafter, the operation of the embodiment of the present invention will be described.

First, when a vehicle equipped with the suspension device of the present invention starts turning along the turning radius R2 on the right side as shown in FIG. 3, the center of gravity M1 of the vehicle is outside the turning radius R2 by centrifugal force. To the left.

As such, when the center of gravity M1 of the vehicle moves outward of the turning radius R2, the second side member 40 existing inside the turning radius R2 may be aligned with the upper member 10. The upper end, which is a coupling part, is changed to a shape that is inclined more toward the lower member 20, and the first side member 30, which is located outside the turning radius R2, is opposite to the upper end, which is a coupling part with the upper member 10. The shape changes to a shape close to.

That is, the angle between the second side member 40 and the lower member 20 is changed to a more acute angle than when the state of FIG. 2, and the angle between the first side member 30 and the lower member 20 is lower. It is changed to an obtuse angle more than in the state of FIG.

Accordingly, the portion located in the inside of the turning radius R2 of the body module 3 corresponding to the body of the vehicle moves downward as shown by arrow P2 shown on the ground, and conversely, the turning of the body module 3 is performed. The portion located outside the radius R2 is moved upward.

Therefore, the vehicle turning along the turning radius R2 on the right side, as shown in FIG. It has the advantage of being.

When the vehicle equipped with the suspension of the present invention starts turning along the turning radius R3 on the left side as shown in FIG. 4, the center of gravity M1 of the vehicle is outside the turning radius R3 by the centrifugal force. To the right.

As such, when the center of gravity M1 of the vehicle moves outward of the turning radius R3, the first side member 30 existing inside the turning radius R3 may have a difference with the upper member 10. The upper end, which is a coupling part, is changed into a shape that is more inclined toward the lower member 20, and the second side member 40, which is outside of the turning radius R3, is opposite to the upper end, which is a coupling part with the upper member 10, is vertical. The shape changes to a shape close to.

That is, the angle between the first side member 40 and the lower member 20 is changed to a more acute angle than when the state of FIG. 2, and the angle between the second side member 40 and the lower member 20 is lower. It is changed to an obtuse angle more than when it is in the state of FIG.

Accordingly, the portion located inside the turning radius R2 of the body module 3 corresponding to the body of the vehicle moves downward as shown by the arrow P2 shown on the ground, and conversely, the turning of the body module 3 is performed. The portion located outside the radius R2 is moved upward.

Therefore, the vehicle turning along the turning radius R3 on the left side, as shown in FIG. 4, causes the left side of the body module 3 to sink toward the ground, thereby greatly improving turning stability and adjustment stability and also increasing ride comfort. There is an advantage to be improved.

In addition, since the suspension device of the embodiment of the present invention is relatively simple in construction and can be developed at low cost, there is an advantage that it can be applied to all types of cars, not some high-end models.

1 is a view for showing the behavior of the body when the vehicle equipped with a conventional suspension device when turning,

2 is a schematic view of a vehicle with a suspension according to the present invention;

3 and 4 are views for showing the behavior of the vehicle body module when the vehicle equipped with the suspension according to the invention when the vehicle travels.

3-Body Module 5-Chassis Module

10-Top member 20-Bottom member

30-First Side Member 31,41-Upper Hinge Shaft

33,43-Lower hinge shaft 40-Second side member

Claims

An upper member 10 fixedly coupled to a lower portion of the body module 3 including a front side member and a rear side member;

A lower member 20 fixedly coupled to an upper portion of the lower chassis module 5 except for the body module 3;

The upper and lower members 10 and 20 are spaced apart in the longitudinal direction, and both ends of the upper and lower members 10 and 20 respectively mediate the upper and lower hinge shafts 31 and 41 and the lower hinge shafts 33 and 43, respectively. It comprises a first side member 30 and the second side member 40 rotatably coupled to;

The first and second side members 30 and 40 are configured such that an interval L1 of the upper hinge shafts 31 and 41 has a smaller interval than an interval L2 of the lower hinge shafts 33 and 43. ;

Suspension of the vehicle.

The method of claim 1, wherein the distance L1 with the upper hinge axes 31, 41 is at least 80 percent (%) to 90% (%) with respect to the distance L2 with the lower hinge axes (33, 43). Configured to have a ratio of;

Suspension of the vehicle, characterized in that.