KR20020052299A - Rear suspension device - Google Patents

Abstract

PURPOSE: A suspension for a rear wheel is provided to compensate rotational moment applied to a wheel by deforming a mounting angle of a stabilizer bar and to prevent vibration of the wheel. CONSTITUTION: A spring(11) and a shock absorber(12) are mounted on a rear portion of a wheel center(C). A stabilizer bar(S) is mounted on a front portion of the wheel center with a specific angle. The stabilizer bar connects suspensions installed on left and right sides of a vehicle by having a metal bar type. The stabilizer bar reduces vibration of the vehicle. Moment(M2) is generated by repulsive force(F2) of the spring to rotate the wheel while generating torsion force in the stabilizer bar. Moment(M3) is generated by bending the stabilizer bar. The moment of the stabilizer bar is applied toward reverse direction of the moment of the spring by fixing the stabilizer bar on the front portion of the wheel center. Thereby, a suspension for a rear wheel compensates rotational moment applied to the wheel by deforming a mounting angle of the stabilizer bar to prevent vibration of the wheel.

Description

Rear suspension device

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rear wheel suspension device, and more particularly, to a rear wheel suspension device configured to cancel a rotation moment by a spring, which is one of the constituent members.

Suspension that controls the vibration of the vehicle up and down for driving comfort and stability of operation, the spring absorbs the shock on the road surface, the shock absorber that controls the operation of the spring and the wheel operation. Cancer and links.

1 is a view showing a typical rear wheel suspension, and FIG. 2 and FIG. 3 are diagrams of a dynamic representation of FIG. 1, showing the spring 1, the shock absorber 2, and the arm and the link described above. The rear wheel suspension shown in FIG. 1 has a structure in which the spring 1 and the shock absorber 2 are separated, and the upper arm is disposed in the wheel. The advantage of such a structure is that the height is lowered by setting the upper arm in the wheel and can be set flat, which is advantageous for the design of a leisure van (RV) vehicle, and is widely used in rear wheel driving or front wheel driving vehicles.

However, in the rear wheel suspension structure of this structure, as shown in Figs. 2 and 3, the spring 1 and the shock absorber 2 are mounted behind the wheel center C for the arrangement of the drive shaft. . As shown in FIG. 3, the reaction force F1 of the spring 1 acts, and since the spring 1 is mounted to the rear of the wheel center C, this reaction force F1 causes the wheel to rotate. Generates M1.

This moment M1 generates friction at the connection portions of the various links, and this friction not only lowers the feeling of riding but also seriously affects the durability of the member. The moment M1 increases as the suspension moves upward, that is, the compression of the spring increases, and in a severe case, causes an abnormal vibration of the wheel and acts as a cause of the brake brake (shimmy brake judder).

In order to minimize such a phenomenon, a method of properly arranging links and using a pillow ball bush to reduce friction may be considered, but this cannot be a fundamental solution.

The present invention is to solve the above-mentioned problems caused by the spring that is a constituent member of the suspension device, to provide a suspension device that can cancel the rotation moment acting on the wheel by modifying the installation angle of the stabilizer bar. There is this.

In order to achieve the above object, the present invention mounts the stabilizer bar constituting the rear suspension to be inclined downward at a predetermined angle (α), and also secures the stabilizer bar to the front of the center of the wheel so that the moment caused by the spring reaction force when the wheel moves. Will generate the opposite moment.

1 shows a typical rear wheel suspension;

2 and 3 are diagrams of the dynamic representation of FIG.

4 and 5 are diagrams showing a dynamic representation of the suspension device according to the present invention.

Hereinafter, with reference to the accompanying drawings of the present invention will be described in detail.

4 and 5 are diagrams of a dynamic representation of the suspension device according to the present invention. The suspension device according to the present invention also includes a spring 11, a shock absorber 12, an arm and a link, and the like. The shock absorber 12 is mounted behind the wheel center C.

The biggest feature of the present invention is that the stabilizer bar (S; stabilizer bar; anti-roll bar) is mounted at a certain angle rather than a horizontal state. The stabilizer bar S is a metal rod or tube connecting suspension devices respectively mounted on the right and left sides of the vehicle, and serves to attenuate the left and right vibrations of the vehicle.

In FIG. 1, which shows a typical suspension device, the stabilizer bar S is mounted in a horizontal state. In FIG. 4, which shows the suspension device according to the present invention, the stabilizer bar S is inclined downward at a predetermined angle α. It is installed. Meanwhile, FIG. 4 illustrates only one suspension device on either the left or right side, but the stabilizer bar S mounted on the other suspension device is also inclined at the same angle. Moreover, in this invention, the wheel side mounting position of the stabilizer bar S was set to the wheel center C front.

As in the present invention, because the stabilizer bar (S) is mounted at a predetermined angle downwardly inclined state, the stabilizer bar (S) not only at the time of the abnormal behavior (roll) of the left and right wheels, but also at the frostbite behavior, the torsion and bending are present. Thus, the stabilizer bar 3 performs the same function as the suspension link.

When the wheel is behaving, the moment M2 generated by the reaction force F2 of the spring 11 acts as a moment for rotating the wheel as described above, and at the same time the torsion bar in the stabilizer bar S Occurs. Since the stabilizer bar S is fixed in front of the center of the wheel, the moment M3 due to the bending of the stabilizer bar S is opposite to the direction of rotation of the wheel, that is, the moment due to the spring reaction force F2 ( It acts in the opposite direction to M2).

As a result, the moment F2 by the spring 11 reaction force F2 is canceled by the moment M3 by the torsion of the stabilizer bar S. As shown in FIG. Here, the torsion moment M3 may be adjusted according to the outer diameter and the inclination angle of the stabilizer bar S, and thus, the torsion moment M3 may be easily adjusted according to the change of the moment M2 due to the change of the reaction force F2 of the spring S. Can be.

As described above, the stabilizer bar performs an anti-roll function, which is a unique function thereof, and maintains the balance of the force of the wheel, thereby rotating the wheel to rotate the wheel by the reaction force of the spring constituting the suspension device. Can be effectively canceled. Therefore, it is possible to reduce the friction that may occur in the connection portion of the various links and to prevent abnormal vibration of the wheel.

Claims (1)

A spring, shock absorber, arm, link, and stabilizer bar, which is mounted on a rear suspension suspended from the center of the wheel, The stabilizer bar is mounted at a predetermined angle (α) downward inclined state, the stabilizer bar is fixed to the front of the wheel center to generate a moment in the opposite direction to the moment caused by the spring reaction force during wheel movement Rear wheel suspension.