KR20030088192A - Strut mounting for a vehicle - Google Patents

Abstract

PURPOSE: A strut mounting for a vehicle is provided to insulate vibration and noise of the strut mounting and to improve the durability of a damping rubber by relieving vibration from the wheel with flowing high viscosity liquid through a pipe during traveling. CONSTITUTION: A strut mounting of a vehicle is composed of a strut housing(70) fixed to a vehicle body by surrounding the upper part of a strut cover(68); a diaphragm(72) combined with the upper end of a bearing fixing pipe(64) in the strut housing; and a bellows pipe(80) placed in the upper part of the diaphragm to flow high viscosity fluid. A piston rod of the damper is combined with the bearing, and a damping rubber(66) is inserted between the strut cover and the bearing fixing pipe. The endurance of the damping rubber is improved by preventing concentration of load into the damping rubber with distributing vibration and impact to the damping rubber and fluid properly.

Description

Strut mounting for a vehicle

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to strut mounting for automobiles, and more particularly, to strut mounting for automobiles, which can improve insulation performance and durability of damping rubber against vibration and noise transmitted from a wheel of a vehicle.

In general, a suspension device of a vehicle is a device installed between a vehicle body and a wheel to connect the two rigid bodies using one or more links, and the hydraulic pressure such as a coil spring and a shock absorber in the vertical direction It is supported by a damper or the like, and in other directions, by appropriately matching high stiffness and flexibility, it performs a function of mechanically appropriately matching the relative movement between the vehicle body and the wheel.

Such suspension is achieved by the sequential coupling of springs, bumper stoppers, boot rubber seats, spring seats and strut mountings, which are then fixed to the vehicle body.

In particular, the strut mounting absorbs vibrations or shocks transmitted through the wheels so as not to be directly transmitted to the vehicle body, thereby preventing damage to the vehicle body and cargo and improving ride comfort.

As shown in FIG. 1, the strut mounting is provided with a coil spring 20 to the outside of the damper 10, and an upper end of the coil spring 20 supports a spring upper; 30 is installed, the bearing 62 is coupled to the outside of the piston rod 12 passing through the central portion of the spring upper (30).

In addition, a bearing fixing tube 64 is coupled to surround the outer surface of the bearing 62, and the bearing fixing tube 64 is again surrounded by a damping rubber 66 and covered by the strut cover 68 to cover the vehicle body ( 50).

Accordingly, when vibration or shock is transmitted from the wheel while driving the vehicle, the piston is primarily buffered through the piston rod 12 of the coil spring 20 and the damper 10, and at the same time, the vibration is absorbed by the buffering action of the damping rubber 66. do.

However, in the conventional strut mounting as described above, as the driving distance of the vehicle is gradually increased, the damping rubber 66 is damaged by the buffering action of the damping rubber 66 repeatedly, thereby preventing the original vibration insulation performance. There was a problem.

The present invention has been made to solve the above problems, an object of the present invention is the strut mounting by absorbing the vibration and shock transmitted to the inside of the strut mounting from the wheel during driving of the vehicle by the buffering action of high viscosity liquid with a damping rubber It is to provide a strut mounting for automobile which can improve the vibration isolation performance of the damper and increase the durability of the damping rubber.

1 is a schematic diagram showing a conventional strut mounting for a vehicle.

Figure 2 is a partial cross-sectional view showing the structure of the strut mounting for automobiles according to the present invention.

<Explanation of symbols for the main parts of the drawings>

10 damper 12 piston rod

20: coil spring 30: spring upper

62: bearing 64: bearing tube

66: damping rubber 68: strut cover

70: strut housing 72: diaphragm

73: (high viscosity) fluid 74: fluid plate

80: corrugated pipe 82: inlet

84: outlet 86: check valve

The present invention is configured as follows to achieve the above object. That is, in the strut mounting according to the present invention, the piston rod of the damper is coupled to the inside of the bearing, and the bearing fixing tube is coupled to surround the outer surface of the bearing, and the strut is formed between the strut cover and the bearing fixing tube fixed to the vehicle body. In the mounting, the strut housing surrounding the upper portion of the strut cover and fixed to the vehicle body, the diaphragm and the diaphragm coupled to the upper end of the bearing fixing tube in the strut housing and the upper part of the diaphragm are provided therein And a pleated pipe through which the filled highly viscous fluid passes.

Here, check valves are provided at both ends of the corrugated pipe to allow only one direction of flow of the fluid so that the high viscosity fluid flows from one side to the other side.

Accordingly, the vibration and shock transmitted to the inside of the strut mounting are absorbed and relaxed by the damping rubber and the high viscosity fluid buffering action, so that the insulation performance of the strut mounting against vibration and shock can be improved and the durability of the damping rubber can be improved.

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

2 is a view showing the structure of a strut mounting for a vehicle according to the present invention.

The strut mounting according to the present invention assists the damping rubber provided with the existing strut mounting together with the damping rubber so that the buffering action by the fluid having high viscosity can be simultaneously performed.

To this end, as shown in FIG. 2, the strut housing 70 is provided outside the strut cover 68 fixed to the bottom of the vehicle body 50 to be fixed to the upper surface of the vehicle body 50.

In addition, an upper portion of the bearing fixing tube 64 coupled to surround the outer surface of the bearing 62 extends a certain length, and the extended upper end is in close contact with the inner surface of the strut housing 70 to screw the diaphragm 72. Is fastened by way.

Here, the diaphragm 72 may be moved up and down together with the bearing fixing tube 64 along the inner surface of the strut housing 70 when pressure is applied upward or downward through the bearing fixing tube 64. It is configured to.

In addition, at a position spaced a predetermined distance from the upper portion of the diaphragm 72, the fluid plate 74 is in close contact with the inner surface of the strut housing 70 like the diaphragm 72 so that it can be moved up and down It is provided.

In addition, a high viscosity fluid is filled between the flow plate 74 and the diaphragm 72, and the high viscosity fluid 73 passes through the inside of the flow plate 74. The corrugated pipe 80 is wrinkled in the form of a spring.

The corrugated pipe 80 has an inlet 82 through which the fluid filled in the lower portion of the flow plate 74 is formed on the right side of the center of the corrugated pipe. A discharge port 84 through which the fluid passes through the inside of the corrugated pipe 80 and is discharged to the lower portion of the flow plate 74 is formed.

In addition, although not shown in the drawing, a portion of the inlet port 82 and the outlet port 84 of the corrugated pipe 80 penetrates the flow plate 74, respectively, and has a high viscosity fluid 73 in the flow plate 74. Through-holes are formed to seal each outer surface of the inlet port 82 and the outlet port 84 so as to be located at the side.

In addition, the inflow port 82 and the discharge port 84 flows the fluid 73 so that the high viscosity fluid 73 flows into the inflow port 82 only and is discharged to the discharge port 84 only. Check valve 86 to control the in one direction is mounted separately.

According to the configuration as described above, when the vibration and shock transmitted from the wheel according to the state of the road surface during the driving of the vehicle is applied into the strut mounting, the damping rubber 66 is accompanied with deformation and buffers the vibration.

In addition, as the bearing fixing tube 64 is moved upward, pressure is applied to the diaphragm 72 to apply pressure to the high-viscosity fluid 73 interposed between the diaphragm 72 and the fluid plate 74. Accordingly, the fluid 73 introduced into the inlet 82 passes through the corrugated pipe 80 and is discharged again through the outlet 84, and a secondary buffering action by the fluid 73 proceeds.

Since the above-described series of processes are performed almost simultaneously, the vibration and shock transmitted to the strut mounting can be absorbed by the damping rubber 66 and the buffering action by the high-viscosity fluid 73 which is auxiliary thereto. As a result, the insulation performance against the vibration of the strut mounting can be further improved.

In addition, since the vibrations and shocks transmitted into the strut mounting can be properly dispersed and buffered by the damping rubber 66 and the fluid 73, it is possible to prevent the load from being concentrated on the damping rubber 66 as in the conventional case. In this way, the durability of the damping rubber 66 can be further improved.

The present invention is not limited to the above embodiments, and various modifications can be made within the scope of the technical idea of the present invention.

According to the present invention of the above-described configuration, the vibration and shock transmitted from the wheel to the strut mounting while driving the vehicle is absorbed by the damping rubber and the high viscosity fluid buffering action to further improve the insulation performance against the vibration of the strut mounting have.

In addition, since the vibration and shock transmitted into the strut mounting can be appropriately dispersed and damped by the damping rubber and the fluid, it is possible to prevent the load from being concentrated by the damping rubber, thereby improving the durability of the damping rubber.

Claims (2)

In the strut mounting in which the piston rod of the damper is coupled to the inside of the bearing, the bearing fixing tube is coupled to surround the outer surface of the bearing, and a damping rubber is interposed between the strut cover and the bearing fixing tube fixed to the vehicle body. A strut housing surrounding an upper portion of the strut cover and fixed to the vehicle body; A diaphragm coupled to the upper end of the bearing fixing tube by a screwing method in the strut housing; And The strut mounting device for a vehicle, characterized in that it comprises a corrugated pipe which is provided on the diaphragm and filled with a high viscosity fluid filled therein. The strut mounting of claim 1, wherein both ends of the corrugated pipe are equipped with check valves to allow only one direction of flow of the fluid so that the high viscosity fluid flows from one side to the other side. .