CN210531490U

CN210531490U - Shock absorber of valve system buffer protection device

Info

Publication number: CN210531490U
Application number: CN201921378220.2U
Authority: CN
Inventors: 王凯伟
Original assignee: Zhejiang Roadtamer Auto Parts Co ltd
Current assignee: Zhejiang Roadtamer Auto Parts Co ltd
Priority date: 2019-08-23
Filing date: 2019-08-23
Publication date: 2020-05-15
Anticipated expiration: 2029-08-23

Abstract

The utility model relates to a shock absorber of using in the automobile suspension system, especially relate to a valve system buffering protection device's shock absorber, including working cylinder, piston rod and with piston rod fixed connection's rebound valve assembly, still include on the working cylinder for the piston rod provide the director of direction, set up in rebound direction of the rebound valve assembly buffer spring, with buffer spring be close to rebound valve assembly one side fixed connection's middle piston, set up in the middle piston with between the rebound valve assembly and with piston rod fixed connection's stopper; wherein a guide sealing surface is formed between the intermediate piston and the working cylinder; and the middle piston is provided with a throttling hole. In the technical scheme, when the stretching stroke of the shock absorber is too long, the shock absorber is in contact with the middle piston 6 through the limiting stopper 7, and the collision between the recovery valve assembly and the guider is avoided by utilizing the hydraulic buffering effect and the elastic force of the buffering spring.

Description

Shock absorber of valve system buffer protection device

Technical Field

The utility model relates to a shock absorber of using in the automobile suspension especially relates to a valve system buffering protection device's shock absorber.

Background

Almost all vehicles have a damping function, which is the function of a damper, which is constantly in dynamic changes of compression and extension. When the automobile is fallen to the ground through a pit or in the air, the problem of overlong stretching stroke often occurs, so that the rebound valve assembly is impacted with the guider, and the service life of the shock absorber is shortened. The prior art scheme is to arrange a nylon buffer block between a rebound valve assembly and a shock absorber. The nylon buffer block is easily damaged at high temperature and after long-time collision.

Disclosure of Invention

The application provides a shock absorber of a valve system buffer protection device for solving the problems.

A shock absorber of a valve system buffer protection device comprises a working cylinder, a piston rod and a recovery valve assembly fixedly connected with the piston rod, wherein the working cylinder further comprises a guider for guiding the piston rod, a buffer spring arranged in the rebound direction of the recovery valve assembly, a middle piston fixedly connected with one side, close to the recovery valve assembly, of the buffer spring, and a limiter arranged between the middle piston and the recovery valve assembly and fixedly connected with the piston rod; wherein a guide sealing surface is formed between the intermediate piston and the working cylinder; and the middle piston is provided with a throttling hole.

In the technical scheme, when the stretching stroke of the shock absorber is too long, the shock absorber is contacted with the middle piston through the limiting stopper and mutually extruded, so that hydraulic oil on one side of a buffer spring of the middle piston flows to the other side through the throttling hole to generate damping force, the kinetic energy of the recovery valve assembly is quickly converted into heat energy to play a role in hydraulic buffering, meanwhile, the elastic force of the buffer spring also works to convert the kinetic energy of the recovery valve assembly into elastic potential energy, and the collision between the recovery valve assembly and the guider can be effectively avoided.

Further, the buffer spring is fixedly connected with the guider; the limiting stopper is fixedly connected with the piston rod through a clamp spring. The maximum extension length of the recovery valve assembly can be greatly improved by connecting the buffer spring with the guider. The clamp spring is used for connecting the limit and the piston rod is convenient to assemble.

Preferably, the middle part of the middle piston is provided with a funnel-shaped hole; the stopper is a block corresponding to the funnel-shaped hole. Thus, when the stopper contacts the middle piston, the funnel-shaped hole in the middle of the middle piston can accommodate the stopper to enter, so that the stable contact is maintained.

Preferably, the intermediate piston comprises a first buffer block fixedly connected with the buffer spring and a first permanent magnet sleeved on the first buffer block; the limiter comprises a second buffer block fixedly connected with the clamp spring and a second permanent magnet sleeved on the second buffer block; the first permanent magnet and the second permanent magnet are opposite in homopolar.

This may reduce the kinetic energy of the rebound valve assembly in advance by the repulsive interaction between the first permanent magnet and the second permanent magnet before the second bumper contacts the first bumper. And the impact force of the second buffer block and the first buffer block during contact is further reduced. Simultaneously first permanent magnet and second permanent magnet can also adsorb little iron fillings in the hydraulic oil, prevent that the orifice from being blockked up by little iron fillings.

Drawings

FIG. 1 is a schematic view of a shock absorber of the valve train cushioning protection device according to one embodiment of the present application;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A according to an embodiment of the present application;

FIG. 3 is an enlarged, fragmentary view at B of FIG. 1 in accordance with an embodiment of the present application;

FIG. 4 is a schematic view of the intermediate piston 6 in one of the preferred embodiments of the present application;

fig. 5 is a schematic view of the stopper 7 according to an embodiment of the present invention.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and that modifications may be made by one skilled in the art without departing from the spirit and scope of the application and it is therefore not intended to be limited to the specific embodiments disclosed below.

In the description of the present application, it is to be understood that the directions or positional relationships indicated by "upper", "lower", "circumferential", etc. are based on the directions or positional relationships shown in the drawings, and are only for convenience of describing the present application and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present application.

As shown in fig. 1-3, in an embodiment, a shock absorber of a valve train buffer protection device is provided, which includes a working cylinder 1, a piston rod 2, and a rebound valve assembly 3 fixedly connected to the piston rod 2, where the working cylinder 1 further includes a guide 4 for guiding the piston rod 2, a buffer spring 5 disposed in a rebound direction of the rebound valve assembly 3, an intermediate piston 6 fixedly connected to a side of the buffer spring 5 close to the rebound valve assembly 3, and a stopper 7 disposed between the intermediate piston 6 and the rebound valve assembly 3 and fixedly connected to the piston rod 2; wherein a guide sealing surface is formed between the intermediate piston 6 and the working cylinder 1; and the middle piston 6 is provided with a throttling hole 8.

In the technical scheme, when the stretching stroke of the shock absorber is too long, the shock absorber is contacted with the middle piston 6 through the limiting stopper 7 and mutually extruded, so that hydraulic oil on one side of a buffer spring of the middle piston 6 flows to the other side through the throttling hole 8 to generate damping force, the kinetic energy of the recovery valve assembly 3 is quickly converted into heat energy to play a role in hydraulic buffering, meanwhile, the elastic force of the buffer spring 5 does work, and the kinetic energy of the recovery valve assembly 3 is converted into elastic potential energy, so that the collision between the recovery valve assembly and the guider can be effectively avoided.

Further, the buffer spring 5 is fixedly connected with the guider 4; the stopper 7 is fixedly connected with the piston rod 2 through a clamp spring 9. The maximum extension length of the restoring valve assembly can be greatly increased by connecting the buffer spring 5 with the guide 4. Utilize jump ring 9 to connect spacing 7 and piston rod 2 equipment convenience.

Preferably, a funnel-shaped hole is formed in the middle of the intermediate piston 6; the stopper 7 is a block corresponding to the funnel-shaped hole. Thus, the funnel-shaped hole in the middle of the intermediate piston 6 can accommodate the stopper 7 when the stopper 7 is in contact with the intermediate piston, thereby maintaining smooth contact.

As shown in fig. 4-5, preferably, the intermediate piston 6 includes a first buffer block 6-1 fixedly connected to the buffer spring 5 and a first permanent magnet 6-2 sleeved on the first buffer block 6-1; the limiter 7 comprises a second buffer block 7-1 fixedly connected with the clamp spring 9 and a second permanent magnet 7-2 sleeved on the second buffer block 7-1; the first permanent magnet 6-2 and the second permanent magnet 7-2 are opposite in homopolar.

This allows the kinetic energy of the rebound valve assembly to be reduced in advance by the repulsive interaction between the first permanent magnet 6-2 and the second permanent magnet 7-2 before the second buffer mass 7-1 comes into contact with the first buffer mass 6-1. Further reducing the impact force of the second buffer block 7-1 and the first buffer block 6-1 when in contact. Meanwhile, the first permanent magnet 6-2 and the second permanent magnet 7-2 can also adsorb small scrap iron in hydraulic oil, so that the throttling hole 8 is prevented from being blocked by the small scrap iron.

Specifically, in the technical scheme, the first buffer block 6-1 and the second buffer block 7-1 can be made of nylon materials.

The above examples only show some embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A shock absorber of a valve system buffering protection device comprises a working cylinder (1), a piston rod (2) and a recovery valve assembly (3) fixedly connected with the piston rod (2), and is characterized in that the working cylinder (1) further comprises a guider (4) for guiding the piston rod (2), a buffer spring (5) arranged in the rebound direction of the recovery valve assembly (3), a middle piston (6) fixedly connected with one side, close to the recovery valve assembly (3), of the buffer spring (5), and a limiter (7) arranged between the middle piston (6) and the recovery valve assembly (3) and fixedly connected with the piston rod (2); wherein a guide sealing surface is formed between the intermediate piston (6) and the working cylinder (1); and the middle piston (6) is provided with a throttling hole (8).

2. Shock absorber of a valve train shock absorber protection device according to claim 1, wherein said damping spring (5) is fixedly connected to said guide (4); the stopper (7) is fixedly connected with the piston rod (2) through a clamp spring (9).

3. Shock absorber of valve train shock absorber protection according to claim 2, characterized in that the middle of the intermediate piston (6) is provided with a funnel-shaped hole; the limiting stopper (7) is a block-shaped body corresponding to the funnel-shaped hole.

4. A shock absorber of a valve train buffering protection device according to claim 3, wherein the intermediate piston (6) comprises a first buffering block (6-1) fixedly connected with the buffering spring (5) and a first permanent magnet (6-2) sleeved on the first buffering block (6-1); the limiter (7) comprises a second buffer block (7-1) fixedly connected with the clamp spring (9) and a second permanent magnet (7-2) sleeved on the second buffer block (7-1); the first permanent magnet (6-2) and the second permanent magnet (7-2) are opposite in homopolar.