CN105172508A - Buffering device of shock absorber - Google Patents

Abstract

The invention discloses a buffer device of a shock absorber, which comprises a buffer block sleeved on a piston rod of a shock absorber, an elastic limit ring is sleeved on the outer diameter of the buffer block, and the elastic deformation of the buffer block is greater than the elastic deformation of the elastic limiting ring; the outer surface of the buffer block is arranged in a wave-shaped concave-convex along the axial direction of the buffer block, and the elastic limiting ring is located on one of the concave surfaces in the wave-shaped concave-convex setting Inside; the elastic limit ring is located in the middle of the buffer block; the inner wall of the buffer block is provided with a plurality of annular grooves at intervals along the axial direction of the buffer block. The invention has a simple structure, can reduce the damage to the buffer block under bad road driving conditions, improve its service life, and can also meet the rigidity requirements corresponding to the load requirements of the whole vehicle in time or in advance, and finally protect the suspension and avoid suspension The impact caused by the "breakdown" of the frame.

Description

A buffer device for a shock absorber

technical field

The invention relates to the technical field of automobile suspension, in particular to a buffer device for a shock absorber.

Background technique

The vibration force received by the car on different road conditions is different. For driving on a good road surface, in order to make the ride feel comfortable, the occupants often hope that the stiffness of the car's shock absorbing mechanism is lower; It is also desirable to increase the stiffness of the shock absorbing mechanism. In response to this opposite desire, the automobile industry often uses buffer blocks on shock absorbers to improve driving comfort and stability.

The buffer block is a device that can limit the maximum deformation of the suspension. It reduces the direct impact of the axle on the frame (or body) and prevents excessive deformation of the elastic elements. When jumping a certain stroke on the wheel, in order to prevent the impact caused by the "breakdown" of the suspension, the buffer block and the main elastic element (usually a coil spring) are connected in parallel to form a more nonlinear elastic element, which is used to limit Suspension travel, to absorb the impact from the wheel to the body, while preventing the suspension from being "broken down", thereby improving ride comfort and protecting the suspension. However, in some bad road conditions, the wheel jumps up to the maximum stroke, which also impacts the buffer block, and the buffer block works at the maximum degree of elastic deformation for a long time, which has a certain impact on the service life of the buffer block, and also makes the buffer block easy to damage.

Contents of the invention

Aiming at the deficiencies of the prior art above, the technical problem to be solved by the present invention is: how to provide a shock absorber buffer device that reduces damage to the buffer block and improves its service life when driving on a bad road.

In order to solve the problems of the technologies described above, the present invention adopts the following technical solutions:

A buffer device for a shock absorber, comprising a buffer block set on the piston rod of the shock absorber, characterized in that: an elastic limit ring is sleeved on the outer diameter of the buffer block, and the elastic deformation of the buffer block greater than the elastic deformation of the elastic limiting ring.

In the present invention, when the wheel jumping stroke increases to a certain extent, the lower end of the buffer block starts to contact the top of the damping cylinder. With the gradual increase of the wheel's jumping stroke, the buffer block is compressed and deformed along the direction of the piston rod of the shock absorber along with the compression of the coil spring, so that the buffer block can absorb part of the impact load transmitted from the wheel to the vehicle body and improve vehicle ride comfort. When the wheel continues to jump up, the buffer block will continue to be compressed, and at the same time, the buffer block will expand in the radial direction. At this time, the buffer block will transfer part of the load to the elastic limit ring sleeved on it, and the elastic limit ring will start to deform at the same time. . The elastic deformation of the buffer block is greater than the elastic deformation of the elastic limit ring, and then the deformation of the elastic limit ring and the buffer block is limited to prevent it from working at the maximum elastic deformation for a long time, reducing the damage to the buffer block , improving its service life.

As an optimization, the outer surface of the buffer block is provided with wave-shaped concavities and convexities along the axial direction of the buffer block, and the elastic limiting ring is located in one of the concave surfaces of the wave-shaped concavo-convex arrangements. When the buffer block expands and contracts under force, the wavy outer surface can also be shortened with the extension, and there will be no force fracture, which improves the service life of the buffer block.

As an optimization, the elastic limiting ring is located in the middle of the buffer block. In the process of stress deformation of the buffer block, the radial deformation range of the middle part is the largest, and the elastic limit ring located in the middle of the buffer block can better limit the buffer block and improve its service life.

As an optimization, the inner wall of the buffer block is provided with a plurality of annular grooves at intervals along the axial direction of the buffer block. During the deformation process of the buffer block, in addition to the outward deformation of the outer surface, the inner wall also deforms inward, and the annular groove provides a deformation space for the inner wall to avoid its damage.

To sum up, the beneficial effects of the present invention are: the present invention has a simple structure, can reduce the damage to the buffer block when driving on bad roads, improve its service life, and can also meet the requirement of providing the corresponding vehicle load in time or in advance The rigidity requirements, and finally protect the suspension, avoiding the impact of the suspension being "broken down".

Description of drawings

In order to make the purpose of the invention, technical solutions and advantages clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings, wherein:

Fig. 1 is a structural schematic diagram of the present invention when it is installed.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings.

As shown in Figure 1, a shock absorber buffer device in this specific embodiment includes a buffer block 2 sleeved on the piston rod 1 of the shock absorber, and an elastic limiter is sleeved on the outer diameter of the buffer block 2. The position ring 3, the elastic deformation of the buffer block 2 is greater than the elastic deformation of the elastic limit ring 3.

In this specific embodiment, the outer surface of the buffer block 2 is provided with wave-shaped concavities along the axial direction of the buffer block 2, and the elastic limiting ring 3 is located in one of the concave surfaces of the wave-shaped concavo-convex arrangements.

In this specific embodiment, the elastic limiting ring 3 is located in the middle of the buffer block 2 .

In this specific embodiment, the inner wall of the buffer block 2 is provided with a plurality of annular grooves 4 at intervals along the axial direction of the buffer block 2 .

Finally, it is noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described with reference to the preferred embodiments of the present invention, those skilled in the art should understand that it can be described in the form Various changes may be made in matter and details thereof without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (4)

1. A buffer device for a shock absorber, comprising a buffer block sleeved on the piston rod of the shock absorber, characterized in that: the outer diameter of the buffer block is sleeved with an elastic limit ring, and the elasticity of the buffer block The deformation amount is greater than the elastic deformation amount of the elastic limiting ring. 2. A shock absorber buffer device according to claim 1, characterized in that: the outer surface of the buffer block is provided with wave-shaped concavities and convexities along the axial direction of the buffer block, and the elastic limit ring is located at the One of the concave surfaces in the wave-shaped concavo-convex setting. 3 . The shock absorber buffer device according to claim 1 , wherein the elastic limiting ring is located in the middle of the buffer block. 4 . 4. The shock absorber buffer device according to claim 1, characterized in that: the inner wall of the buffer block is provided with a plurality of annular grooves at intervals along the axial direction of the buffer block.