JPH0712170A - Shock absorber - Google Patents

Abstract

PURPOSE:To provide a shock absorber capable of reducing impulsive load applied to a body side fitting part and preventing the lateral projection and slip-off of a rubber bush. CONSTITUTION:An inner cylinder 6 supported on the body side, and an outer cylinder 7 for supporting a shock absorber body are coaxially provided, and a rubber bush 8 is interposed between the inner and outer cylinders 6, 7 to form a supporting part 2. In a shock absorber of such constitution, recessed parts 6a, 7a are formed along the circumferential direction in the mutually corresponding positions at both end parts of the outer peripheral surface of the inner cylinder 6 and the inner peripheral surface of the outer cylinder 7, and both end parts of a spring washer 9 disposed in the recessed part 6a on the outer peripheral surface of the inner cylinder 6 are interposed in the recessed part 7a on the inner peripheral surface of the outer cylinder 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shock absorber capable of reducing a shocking load applied to a vehicle body side mounting portion.

[0002]

2. Description of the Related Art In two-wheeled vehicles and four-wheeled vehicles, various shock absorbers are used as suspension devices for wheels in order to prevent an impact applied to the wheels from being transmitted to the vehicle body.

3 and 4 show an example of a suspension system for wheels used in a four-wheeled vehicle. A rear axle housing 102 of a rear axle shaft 101 for driving the wheels 100 is attached to a vehicle body frame 103. It is supported by the leaf spring 104 and the shock absorber 105.

In such a shock absorber 105, the riding comfort is influenced by the structure of the connecting portion between the vehicle body frame 103 and the shock absorber 105.
Usually, as shown in FIG. 5, a rubber bush 107 is interposed in the support portion 106 of the shock absorber 105.

6 and 7 show a shock absorber 10.
5, the inner cylinder 108 supported on the vehicle body side and the outer cylinder 110 supporting the shock absorber body 109 are coaxially provided, and the inner cylinder 108 and the outer cylinder 1 are provided.
A rubber bush 107 is interposed between the ten members to form a supporting portion. To attach such a shock absorber 105 to the vehicle body frame 103, as shown in FIG. 8, a stud type bolt 111 is erected on the vehicle body frame 103, and the shock absorber 105 is attached to this bolt 111.
The inner cylinder 108 is attached and tightened with a nut 112. As shown in FIG. 9, a welding nut 113 is embedded in the vehicle body frame 103 in place of the bolt 111,
The bolt 114 is attached to the inner cylinder 108 of the shock absorber 105.
It is adapted to be screwed to the welding nut 113 through.

[0006]

However, according to the above-mentioned conventional technique, the rubber bush 107 is mounted between the inner cylinder 108 and the outer cylinder 110 by fitting or baking, but a sudden vertical load or a prying force acts. Then, as shown in FIG. 10, the rubber bush 107 may deform and come off.

The present invention solves the above problems and provides a shock absorber capable of reducing the impact load applied to the vehicle body side mounting portion and preventing the rubber bush from laterally protruding and falling off. To aim.

[0008]

In order to solve the above problems, the present invention provides an inner cylinder supported on the vehicle body side and an outer cylinder supporting the shock absorber body on the same axis, and the inner cylinder and the outer cylinder are mutually connected. In a shock absorber in which a rubber bush is interposed between the shock absorbers, a concave portion is formed along the circumferential direction at positions corresponding to each other at both ends of the outer peripheral surface of the inner cylinder and the inner peripheral surface of the outer cylinder. Both ends of the spring washer arranged in the concave portion of the outer peripheral surface of the inner cylinder are interposed in the concave portion of the inner peripheral surface of the outer cylinder.

[0009]

Operation: Both end portions of the spring washer formed by forming a recess along the circumferential direction at both ends of the outer peripheral surface of the inner cylinder and the inner peripheral surface of the outer cylinder, the recesses being formed in the outer peripheral surface of the inner cylinder. Since it is interposed in the concave portion of the inner peripheral surface of the outer cylinder, when a sudden vertical load is generated, a part of the load is received by the spring action of the spring washer, so that the shock load is reduced.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to FIGS. 1 and 2 showing an upper support portion of a shock absorber. In FIGS. 1 and 2, reference numeral 1 denotes a shock absorber, and the upper end support portion 2 is fixed to the vehicle body frame 3 via stud bolts 4 and nuts 5 provided upright.

The upper end support portion 2 of the shock absorber 1 is composed of a coaxial inner cylinder 6 and outer cylinder 7, and a rubber bush 8 is arranged between the inner cylinder 6 and the outer cylinder 7.

A rubber bush 8 is sandwiched between the outer peripheral surface of the inner cylinder 6 and the inner peripheral surface of the outer cylinder 7, and a pair of left and right recesses 6 are circumferentially provided at positions corresponding to each other at both ends.
a and 7a are formed. Reference numeral 9 denotes an Ω-shaped spring washer which is arranged between the concave portions 6a of the inner cylinder 6 and the concave portion 7a of the outer cylinder 7. The spring washer 9 has a curved portion 9a wound around the concave portion 6a on the outer peripheral surface of the inner cylinder 6,
Both ends 9b are disposed in the recess 7a on the inner peripheral surface of the outer cylinder 7 and are arranged between the outer peripheral surface of the inner cylinder 6 and the inner peripheral surface of the outer cylinder 7.

According to the shock absorber having the above structure, when a shocking load is transmitted from the wheel to the shock absorber 1, the load for compressing the rubber bush 8 is applied to the upper end support portion 2 of the shock absorber 1 by the inner cylinder 6 and the outer cylinder 7. Work with each other. At this time, the elastic force of the rubber bush 8 acts between the inner cylinder 6 and the outer cylinder 7 to reduce a shocking compressive load applied to the rubber bush 8. On the other hand, since the elastic force of the left and right spring washers 9 acts between the outer peripheral surface of the inner cylinder 6 and the inner peripheral surface of the outer cylinder 7, the inner cylinder 6 and the outer cylinder 7 are elastically coupled to each other. Therefore, the rubber bush 8 is unlikely to protrude or deform in the lateral direction,
It is prevented from falling off.

Needless to say, the structure of the upper end supporting portion 2 of the shock absorber 1 can be applied to the lower end supporting portion (not shown).

[0015]

As described above, according to the shock absorber of the present invention, the following effects can be obtained. A shock absorber in which an inner cylinder supported on the vehicle body side and an outer cylinder supporting a shock absorber body are coaxially provided, and a rubber bush is interposed between the inner cylinder and the outer cylinder to form a support portion, A concave portion is formed along the circumferential direction at both ends of the outer peripheral surface of the cylinder and the inner peripheral surface of the outer cylinder, and both ends of the spring washer arranged in the concave portion of the outer peripheral surface of the inner cylinder are connected to the outer cylinder. Since it is interposed in the concave portion of the inner peripheral surface, it is possible to reduce the impact load applied to the mounting portion of the shock absorber on the vehicle body side. In addition, since the elastic forces of the left and right spring washers act between the outer peripheral surface of the inner cylinder and the inner peripheral surface of the outer cylinder, the inner cylinder and the outer cylinder are elastically coupled to each other. The bush does not easily protrude or deform in the lateral direction and is prevented from falling off.

[Brief description of drawings]

FIG. 1 is a conceptual diagram showing an embodiment of a shock absorber according to the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a side view showing an example of a suspension device for a wheel used in a four-wheeled vehicle.

FIG. 4 is a partial cross-sectional view showing an example of a suspension device for a wheel used in a four-wheeled vehicle.

FIG. 5 is a conceptual diagram showing a conventional shock absorber.

FIG. 6 is a partial cross-sectional view showing a support portion of a conventional shock absorber.

7 is a cross-sectional view taken along the line AA of FIG.

8 is a conceptual diagram showing the stud bolt of FIG. 7. FIG.

FIG. 9 is a conceptual diagram showing another embodiment of the shock absorber mounting structure.

FIG. 10 is a partial cross-sectional view showing a deformed state of a support portion of a conventional shock absorber.

[Explanation of symbols]

 1 Shock Absorber 2 Upper End Support 3 Body Frame 4 Stud Bolt 5 Nut 6 Inner Cylinder 7 Outer Cylinder 8 Rubber Bushing 9 Spring Washer 6a Recess 7a Recess

Claims (2)

[Claims] 1. A shock in which an inner cylinder supported on the vehicle body side and an outer cylinder supporting a shock absorber body are coaxially provided, and a rubber bush is interposed between the inner cylinder and the outer cylinder to form a support portion. In the absorber, recesses are formed along the circumferential direction at both ends of the outer peripheral surface of the inner cylinder and the inner peripheral surface of the outer cylinder, and both ends of a spring washer arranged in the recess on the outer peripheral surface of the inner cylinder. A shock absorber characterized in that a portion is interposed in a concave portion on the inner peripheral surface of the outer cylinder. 2. A curved portion of an Ω-shaped spring washer is wound around a concave portion of the outer peripheral surface of the inner cylinder, and both ends thereof are interposed in a concave portion of the inner peripheral surface of the outer cylinder, and the spring washer is attached to the outer peripheral surface of the inner cylinder. The shock absorber according to claim 1, wherein the shock absorber is arranged between the inner peripheral surfaces of the cylinder.