CN103016594B - Damper with automatic damping adjusting function - Google Patents

Abstract

The invention discloses a shock absorber with automatic damping adjustment, which belongs to the field of shock absorbers and includes a cylinder body and a piston rod. The inner wall of the cylinder body at least includes a first cavity and a second cavity with different diameters. The first cavity A first piston and a second piston are slidably connected in a cavity, a third piston is slidably connected in the second cavity, damping holes are provided on the first piston and the third piston, and the first piston A first vent hole is provided on the second piston, a second vent hole is provided on the second piston, and the damping hole provided on the first piston and the second vent hole provided on the second piston are on the horizontal plane. The projections intersect, an elastic member is arranged between the first piston and the second piston, the second piston and the third piston are connected by a connecting rod, and the piston rod is arranged on the first piston superior.

Description

Shock absorbers with automatic damping adjustment

technical field

The invention relates to the technical field of shock absorbers, in particular to a shock absorber with automatic damping adjustment.

Background technique

The shock absorber is mainly used to suppress the shock when the spring rebounds after absorbing the shock and the impact from the road surface. When passing through uneven roads, although the shock-absorbing spring can filter the vibration of the road surface, the spring itself will reciprocate, and the shock absorber is used to suppress this spring jumping. Shock absorbers rely on damping force to dampen spring jump. If the damping force is too small, the vehicle body will jump up and down, and if the damping force is too large, there will be too much resistance, which will prevent the spring from working normally.

The traditional shock absorber mainly includes a cylinder body, a piston is arranged in the cylinder body, a piston rod is fixed on the piston, a damping hole is also arranged on the piston, and the two ends of the spring are respectively fixed on the piston rod and the cylinder body. When the car is shaken, When the spring is compressed or pulled, the piston rod also moves up and down. During the movement, the piston receives greater resistance, which slows down the jumping of the spring. The resistance of the piston is determined by the size of the damping hole, and once the damping hole is formed, its size cannot be changed, which leads to the inability to adjust the damping of the shock absorber.

Contents of the invention

Aiming at the deficiencies in the prior art, the invention provides a shock absorber with automatic damping adjustment, which can automatically adjust the damping force of the shock absorber according to the size of the vibration.

In order to solve the above-mentioned technical problems, the present invention is solved by the following technical solutions: the shock absorber with automatic damping adjustment includes a cylinder body and a piston rod, and the inner wall of the cylinder body includes at least a first cavity and a second cavity with different diameters , a first piston and a second piston are slidably connected in the first cavity, a third piston is slidably connected in the second cavity, damping holes are arranged on the first piston and the third piston, so The first piston is provided with a first vent hole, the second piston is provided with a second vent hole, the damping hole provided on the first piston and the second vent hole provided on the second piston The projections on the horizontal plane intersect, an elastic member is arranged between the first piston and the second piston, and the second piston and the third piston are connected through a connecting rod, and the piston rod is arranged on the above the first piston. When the shock absorber works on a road section that is not very bumpy, the first piston and the second piston are separated from each other under the action of the elastic member. Since the first piston and the second piston are provided with the first air hole and the second air hole, the airflow can be Free circulation through these two vent holes, so the first piston and the second piston do not play a damping role at this time, only the third piston plays a damping role, and the damping force is not very large, so as to prevent the shock absorber from hindering the normal operation of the spring . When the shock absorber works on a bumpy road section, the first piston and the second piston fit together due to the impact force, and both the first vent hole and the second vent hole are blocked. At this time, the damping hole on the first piston It also plays a damping role. At this time, the damping force is greatly increased to prevent the spring from recovering too quickly, causing the vehicle to jump.

In the above technical solution, preferably, the first piston is provided with a first accommodation groove, the second piston is provided with a second accommodation groove, and the two ends of the elastic member are respectively located in the first accommodation groove and Inside the second receiving groove.

In the above technical solution, preferably, the elastic member is a spring.

The invention has the beneficial effects that: when the vehicle runs on a smooth road, the damping of the shock absorber is very small, preventing the shock absorber from hindering the normal work of the spring. When the vehicle is running on a bumpy road, the damping of the shock absorber becomes larger, so as to avoid the spring elastic recovery too fast, causing the vehicle to jump.

Description of drawings

Fig. 1 is a schematic diagram of a shock absorber with automatic damping adjustment working on a smooth road.

Fig. 2 is a schematic diagram of a shock absorber with automatic damping adjustment working on a bumpy road.

Detailed ways

The present invention will be described in further detail below in conjunction with accompanying drawing and specific embodiment: Referring to Fig. 1, the shock absorber that damping automatically adjusts, comprises cylinder body 1 and piston rod 2, and the inner wall of cylinder comprises at least the first cavity 11 of different diameter and The second cavity 12, the first piston 31 and the second piston 32 are slidably connected in the first cavity 11, the third piston 33 is slidably connected in the second cavity 12, the first piston 31 and the third piston 33 are all Damping holes 311 and 331 are provided, a first vent hole 312 is provided on the first piston 31, a second vent hole 321 is provided on the second piston 32, and the damping hole 311 provided on the first piston 31 and the second piston 32 The projections of the set second ventilation hole 321 on the horizontal plane intersect, a spring 5 is arranged between the first piston 31 and the second piston 32, the first piston 31 is provided with a first accommodation groove 3a, and the second piston 32 is provided with a In the second receiving groove 3b, two ends of the spring 5 are respectively located in the first receiving groove 3a and the second receiving groove 3b. The second piston 32 and the third piston 33 are connected through a connecting rod 4 , and the piston rod 2 is arranged on the first piston 31 .

Referring to Figure 1, when the vehicle is running on a smooth road, the first piston and the second piston are separated from each other under the action of the elastic member, and the first piston and the second piston are provided with the first vent hole and the second vent hole, so the air flow can pass through These two air holes circulate freely, so the first piston and the second piston do not play a damping role at this time, only the third piston plays a damping role, and the damping force is not very large, so as to prevent the shock absorber from hindering the normal operation of the spring.

Referring to Figure 2, when the shock absorber is working on a bumpy road, the first piston and the second piston fit together due to the impact force, the first vent hole and the second vent hole are blocked, at this time the first piston The damping holes on the top also play a damping role. At this time, the damping force is greatly increased to prevent the spring from recovering too quickly, causing the vehicle to jump.

Claims (2)

1. the vibration damper that automatically regulates of damping, comprise cylinder body (1) and piston rod (2), it is characterized in that: described inboard wall of cylinder block at least comprises different the first cavity (11) of diameter and the second cavity (12), first piston (31) and the second piston (32) is slidably connected in described first cavity (11), the 3rd piston (33) is slidably connected in described second cavity (12), described first piston (31) and described 3rd piston (33) are all provided with damping hole (311, 331), described first piston (31) is provided with the first vent (312), described second piston (32) is provided with the second vent (321), the upper described damping hole (311) arranged of described first piston (31) is crossing with upper the second vent (321) projection in the horizontal plane arranged of described second piston (32), elastic component is provided with between described first piston (31) and described second piston (32), be connected by connecting rod (4) between described second piston (32) and described 3rd piston (33), described piston rod (2) is arranged on described first piston (31), described first piston (31) is provided with the first receiving groove (3a), described second piston (32) is provided with the second receiving groove (3b), the two ends of described elastic component lay respectively in described first receiving groove (3a) and described second receiving groove (3b).

2. the vibration damper that automatically regulates of damping according to claim 1, is characterized in that: described elastic component is spring (5).