KR19990033837A - Rebound bumper on lower control arm - Google Patents

Abstract

The present invention relates to a rebound bumper of a lower control arm capable of absorbing vibrations upon contact with the lower control arm constituting the front wheel suspension and improving riding comfort, which is fixed to the fixed plate 36. And a first case fastened to the fixing plate 42 by a screw 56, a first damping rubber 48 embedded in the first case, and a second damping rubber 52. The second case 46 is slidably mounted along the inner wall of the first case 44, and the third damping rubber 54 attached to the lower portion of the second case 46 is provided.

Description

Rebound bumper on lower control arm

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suspension for automobiles, and more particularly, to a rebound bumper of a lower control arm capable of absorbing vibration upon contact with a lower control arm constituting a front wheel suspension and improving riding comfort.

In general, the suspension system of the automobile connects the axle to the vehicle body, and prevents damage to the vehicle body or the cargo by absorbing vibrations or shocks received from the road surface while the vehicle is not directly transmitted to the vehicle body. It plays a role in maintaining a good ride quality. The suspension is used in various forms depending on the driving method of the wheel and the type of the spring system, for the configuration of the independent suspension that is widely adopted in the passenger vehicle with reference to Figure 1 to help understand the present invention. Explain.

Figure 1 is a cross-sectional view showing a configuration of a general front wheel suspension, the overall configuration of the steering wheel to enable the steering of the vehicle by turning by the steering force transmitted through the steering mechanism while rotatably supporting the wheel (10) Disposed at the lower portion of the steering knuckle 12 via the knuckle 12, the upper control arm 16 disposed above the steering knuckle 12 via the ball joint 14, and the ball joint 30; The lower control arm 20, the coil spring 22 mounted on the lower control arm 20 to absorb vibrations or shocks transmitted from the road surface, and the free vibration of the coil spring 22 are suppressed to improve ride comfort. Shock absorber 24, a stabilizer 26 which reduces the inclination of the vehicle body during rolling and maintains equilibrium and one end is coupled to the lower control arm 20 and the other end is Through Damping Rubber (18) It consists of a strut bar 28 fixed to the frame to balance the bodywork.

2 is an exploded perspective view showing a rebound bumper of a conventional lower control arm, in which shock is absorbed when the arm mounting bracket 32 for connecting the strut bar 28 to the lower control arm 20 is bounded; The conventional rebound bumper 38 is mounted to a fixing bracket 36 attached to the frame 34. In addition, the frame 34 is attached with a bracket 37 for fixing one end of the upper control arm 16 described above, and the rebound bumper 39 for absorbing shock when the upper control arm 16 is bound. Is attached to the bracket (35).

In the conventional rebound bumper of the lower control arm having such a configuration, since it is manufactured in a simple form using rubber, it is subjected to an eccentric load when the lower control arm is bound, and thus the shock absorbing power is lowered. In the case of an off-road or unpaved irregular road surface, there is a problem that the riding comfort is reduced by the impact transmitted from the road surface through the lower control arm.

In order to solve the above problems, the present invention inserts a first damping rubber and a second damping rubber into a case, and then inserts a bellows between the damping rubbers to prevent an impact transmitted when contacting the lower control arm. The aim is to provide a rebound bumper on the lower control arm that absorbs enough to always maintain a good ride.

1 is a cross-sectional view showing the configuration of a typical front wheel suspension

Figure 2 is an exploded perspective view showing the rebound bumper of the conventional lower control arm

3 is a cross-sectional view of the rebound bumper of the lower control arm in accordance with the present invention.

♣ Explanation of symbols for the main parts of the drawing

16: Upper control arm 20: Lower control arm

28: Strut bar 32: Arm mounting bracket

36: fixed bracket 40: bumper

42: fixed plate 44, 46: first and second cases

48, 52, 54: 1st, 2nd, 3rd damping rubber 50: Bellows

56: screw

An object of the present invention described above is provided in the fixing bracket of the frame, and in the rebound bumper of the lower control arm absorbing the shock transmitted from the lower control arm through the arm mounting bracket, the fixing plate fitted to the fixing bracket and the screw. A first case fastened to the fixing plate, a first damping rubber embedded in the first case, a second case slidably mounted along the inner wall of the first case via a second damping rubber, It is achieved by the rebound bumper of the lower control arm, characterized in that it consists of a third damping rubber attached to the bottom of the second case.

Hereinafter, the rebound bumper of the lower control arm according to the preferred embodiment of the present invention will be described in detail with reference to the accompanying FIG. 3.

3 is a cross-sectional view of the rebound bumper of the lower control arm according to the present invention, in which identical parts are denoted by the same reference numerals as the conventional structures described in FIGS. 1 and 2.

As shown, in the rebound bumper of the lower control arm according to the invention, together with the first to third damping rubbers 48, 52 and 54, the cases 44 and 54 made of steel with a certain degree of elasticity are used. By employing, it has a structure that absorbs the impact of the lower control arm 20 transmitted through the arm mounting bracket 32 at the time of the lower control arm 20 bound.

Looking at the configuration of this in more detail, the first case is fixed to the fixing plate 42, which is fitted to the fixing bracket 36 by screws 56, the first damping rubber 48 is built in the first case have. In addition, the second case 46 is mounted on the lower end of the first case 44 so as to be slidable along its inner wall via a cylindrical second damping rubber 52. A lower soft compressive third damping rubber 54 is attached to the lower part of the second case 46.

Here, since the first and second cases 44 and 46 are made of steel, they have some elastic force, and in particular, the bellows in the second damping rubber 52 installed inside the first case 44. Since 50 is built in, sufficient buffering effect can be obtained.

The process of absorbing the shock transmitted from the lower control arm by using the shock absorbing bumper 40 of this configuration will be described.

When the strong shock is transmitted from the lower control arm 20 through the arm mounting bracket 32, the third damping rubber 54 is compressed and the first shock is absorbed, and then the second case 46 is the second damping. The rubber 52 and the bellows 50 are raised while compressing, and the shock is secondarily absorbed. The impact transmitted upward through the bellows 50 is finally absorbed by the first damping rubber 48.

Next, when a moderate shock is transmitted, the shock is absorbed by the third damping rubber 54, the second damping rubber 52, and the bellows 50 in order according to the above-described principle. However, when a minute impact is transmitted, it is sufficiently absorbed by the third damping rubber 54 attached to the lower part of the second case 46.

In the shock absorbing process, since the first and second cases 44 and 46 are made of thin elastic steel, the shock absorbing action of the second damping rubber 52 and the bellows 50 overlaps each other, and a certain amount of impact is generated. In addition to being absorbed, the remaining shock is absorbed by the first to third damping rubbers 48, 52, and 54, thereby sufficiently blocking the shock transmitted to the frame.

The rebound bumper of the lower control arm according to the present invention described above is inserted into the case of the first damping rubber and the second damping rubber, and then inserted into the bellows between the damping rubber is delivered when the contact with the lower control arm The shock absorber is sufficiently absorbed to have an excellent ride comfort.

Claims (4)

In the rebound bumper of the lower control arm, which is installed in the fixing bracket 36 of the frame 34 and absorbs the shock transmitted from the lower control arm 20 through the arm mounting bracket 32, A fixing plate 42 fitted to the fixing bracket 36; A first case fastened to the fixing plate 42 by screws 56, A first damping rubber 48 embedded in the first case, A second case 46 mounted slidably along an inner wall of the first case 44 via a second damping rubber 52; Rebound bumper of the lower control arm, characterized in that consisting of a third damping rubber (54) attached to the lower portion of the second case (46). The method of claim 1, Rebound bumper of the lower control arm, characterized in that the second damping rubber 52 is configured in a cylindrical shape. The method of claim 2, Rebound bumper of the lower control arm, characterized in that the bellows (50) is inserted in the second damping rubber (52). The method of claim 1, Rebound bumper of the lower control arm, characterized in that the third damping rubber (54) is made of soft rubber having a lower compressive strength than the first damping rubber (48).