CN215890913U

CN215890913U - Vibration damper device

Info

Publication number: CN215890913U
Application number: CN202122463583.XU
Authority: CN
Inventors: 李玉魁; 庄英武; 李泽楠
Original assignee: Evergrande Hengchi New Energy Automobile Research Institute Shanghai Co Ltd
Current assignee: Evergrande Hengchi New Energy Automobile Research Institute Shanghai Co Ltd
Priority date: 2021-10-13
Filing date: 2021-10-13
Publication date: 2022-02-22
Anticipated expiration: 2031-10-13

Abstract

The application discloses a shock absorber device, which comprises a cylinder barrel, a piston valve and a piston rod, wherein the piston valve is slidably arranged in the cylinder barrel; one end of the cylinder barrel is a sealed barrel bottom, the other end of the cylinder barrel is provided with an end cover, and the piston rod extends out of the end cover; the piston valve is provided with a piston valve through hole for the hydraulic oil to pass through; and a buffer mechanism for damping the piston valve to move towards the bottom side of the cylinder is further installed in the cylinder barrel and is positioned between the bottom of the cylinder and the piston valve. The utility model discloses a shock absorber device disposes buffer gear in the cylinder, and when the piston rod was compressed, the piston rod drove the piston valve and moves towards the section of thick bamboo bottom side, and buffer gear damping piston valve's motion, buffer gear play the energy-absorbing effect to can absorb the partial impact force of piston valve compression in-process, can reduce the impact in piston valve compression in-process and feel.

Description

Vibration damper device

Technical Field

The application relates to the technical field of automobile chassis vibration damping devices, in particular to a vibration damper device.

Background

The elastic elements (damping springs) of the chassis of the vehicle vibrate after being impacted. In order to improve the running smoothness of the automobile, a shock absorber connected with an elastic element in parallel is installed in a suspension system and used for relieving impact and attenuating vibration, so that the running smoothness of the automobile is improved.

Hydraulic shock absorbers are widely used in suspension systems, and the relative speed of movement of the piston rod and the cylinder affects the amount of damping force provided by the hydraulic shock absorber. The larger the relative movement speed of the piston rod and the cylinder barrel is, the larger the damping force is, and on the contrary, the smaller the damping force is. When an automobile passes through an uneven road surface at a certain speed, the height difference of the road surface can cause the shock absorber to stretch and compress to a larger extent, after the shock absorber is compressed to the extreme position, the buffer block at the upper end of the piston rod is compressed to have larger rigidity, the rigidity of the whole system is very large, and if the speed of the wheels relative to the automobile body is still larger at the moment, the impact of the road surface is directly transmitted to the automobile body, so that obvious impact feeling can be felt.

SUMMERY OF THE UTILITY MODEL

The present application is directed to overcome the disadvantages of the prior art, and to provide a shock absorber device, in which a buffer mechanism can damp the motion of a piston valve when the shock absorber device is in a compressed state, so as to absorb a part of the impact force generated during the compression of the piston valve, thereby reducing the impact feeling during the compression of the piston valve.

The technical scheme of the application provides a shock absorber device, which comprises a cylinder barrel, a piston valve and a piston rod, wherein the piston valve is slidably arranged in the cylinder barrel;

one end of the cylinder barrel is a sealed barrel bottom, the other end of the cylinder barrel is provided with an end cover, and the piston rod extends out of the end cover;

the piston valve is provided with a piston valve through hole for the hydraulic oil to pass through;

and a buffer mechanism for damping the piston valve to move towards the bottom side of the cylinder is further installed in the cylinder barrel and is positioned between the bottom of the cylinder and the piston valve.

In one optional aspect, the damping mechanism includes a float valve slidably disposed in the cylinder and an elastic member for driving the float valve to move toward the piston valve side.

In one optional technical scheme, an extension rod extends from one side of the piston valve, which faces the floating valve;

the floating valve is provided with a floating valve through hole for the extension rod to pass through;

the extension rod is connected with a sealing valve which can seal the floating valve through hole and can drive the floating valve to move towards the bottom side of the cylinder;

and the sealing valve is provided with a sealing valve through hole for the hydraulic oil to pass through.

In one optional technical scheme, the buffering mechanism further comprises a mounting seat fixedly mounted in the cylinder and capable of limiting the movement of the floating valve, and the elastic piece is connected between the mounting seat and the floating valve.

In an optional technical solution, the mounting seat has a mounting seat through hole for the extension rod to pass through.

In an optional technical solution, a preset distance is provided between the mounting seat and the cylinder bottom.

In one optional solution, the elastic member is an expansion spring.

In an optional technical solution, the piston rod and the extension rod are integrally formed.

In an alternative technical scheme, the section of the floating valve through hole along the axial direction of the cylinder barrel is trapezoidal, and the radius of the floating valve through hole is gradually reduced along the direction from the piston valve to the mounting seat;

the radius of the sealing valve is larger than the minimum radius of the floating valve through hole and smaller than the maximum radius of the floating valve through hole.

In one optional technical solution, a cross section of the sealing valve along an axial direction of the cylinder is trapezoidal, and a radius of the sealing valve is gradually reduced in a direction from the piston valve to the mounting seat;

wherein the maximum radius of the sealing valve is smaller than the maximum radius of the floating valve through hole, and the minimum radius of the sealing valve is larger than the minimum radius of the floating valve through hole.

By adopting the technical scheme, the method has the following beneficial effects:

the application provides a shock absorber device disposes buffer gear in the cylinder, and when the piston rod was compressed, the piston rod drove the piston valve and moves towards the section of thick bamboo bottom side, and buffer gear damping piston valve's motion, buffer gear play the energy-absorbing effect to can absorb some impact force, can reduce the impact in piston valve compression process and feel.

Drawings

The disclosure of the present application will become more readily understood by reference to the drawings. It should be understood that: these drawings are for illustrative purposes only and are not intended to limit the scope of the present application. In the figure:

FIG. 1 is a cross-sectional view of a damper device provided in accordance with an embodiment of the present application;

FIG. 2 is a schematic view of a piston valve having a piston valve through bore;

fig. 3 is a schematic view of a sealing valve having a sealing valve through hole therein;

FIG. 4 is a schematic illustration of the flow of hydraulic oil as the piston valve moves when the piston valve is not being damped by the damping mechanism in the shock absorber device;

FIG. 5 is a schematic view of the sealing valve sealing the through hole of the float valve when the piston valve is compressed by a certain amount;

fig. 6 is a schematic view of the flow of hydraulic oil when the sealing valve moves the floating valve toward the bottom of the cylinder;

FIG. 7 is a schematic view of the float valve moving to an extreme position in contact with the mounting seat;

FIG. 8 is a schematic diagram of the flow of hydraulic oil as the float valve is unseated after reaching a limit position.

Detailed Description

The following further describes embodiments of the present invention with reference to the accompanying drawings. In which like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

As shown in fig. 1 to 2, a shock absorber device according to an embodiment of the present invention includes a cylinder 1, a piston valve 2 slidably disposed in the cylinder 1, and a piston rod 3 connected to the piston valve 2.

One end of the cylinder barrel 1 is a sealed barrel bottom 11, the other end of the cylinder barrel is provided with an end cover 12, and the piston rod 3 extends out of the end cover 12.

The piston valve 2 has a piston valve through hole 21 for the passage of hydraulic oil.

Wherein, a buffer mechanism 6 for damping the movement of the piston valve 2 towards the cylinder bottom 11 side is also installed in the cylinder tube 1, and the buffer mechanism 6 is positioned between the cylinder bottom 11 and the piston valve 2.

The application provides a shock absorber device is spare part in the automobile suspension, and it plays the effect of buffering damping with damping spring together.

The damper device includes a cylinder 1, a piston valve 2, a piston rod 3, and a damper mechanism 6.

One end of the cylinder 1 is sealed and the other end is open. The sealed end of the cylinder 1 is referred to as the bottom 11. An end cap 12 is attached to the other end opening of the cylinder tube 1.

The piston valve 2 has a piston valve through hole 21, the piston valve 2 is installed in the cylinder 1, the edge of the piston valve 2 is sealed with the inner surface of the cylinder 1, and the piston valve 2 can slide in the cylinder 1. When the piston valve 2 slides, hydraulic oil in the oil chambers on both sides can flow through the piston valve through-hole 21. One end of the piston rod 3 is fixedly connected with the piston valve 2, and the other end thereof extends out of the end cover 12. The end of the cylinder 1 remote from the piston rod 3 has a mounting portion. When the vehicle is mounted, the mounting portion of the cylinder 1 is connected to a fixed portion on the inner side of the wheel, and the piston rod 3 is connected to a fixed portion on the vehicle body. A rubber buffer block is arranged between the piston rod 3 and a fixed part on the vehicle body.

When the automobile passes through a bumpy road surface, if the automobile body moves downwards, the piston rod 3 is compressed, and then the piston valve 2 is compressed; if the vehicle body moves upward, the piston rod 3 is pulled out, and the piston valve 2 is pulled. The piston valve 2 divides the cylinder 1 into two chambers, and during the above process, the hydraulic oil in the compressed chamber flows to the chamber on the other side through the piston valve through hole 21. The piston valve 2 rubs against the cylinder 1 during sliding to produce damping.

In order to relieve the impact force generated when the piston valve 2 is compressed (particularly at the extreme position), a damping mechanism 6 is mounted in the cylinder 1, and the damping mechanism 6 and the piston rod 3 are arranged at two opposite sides of the piston valve 2. The damping mechanism 6 may be an elastic device. When the piston valve 2 is compressed and moved and contacts with the buffer mechanism 6, the buffer mechanism 6 can damp the piston valve 2 to move towards the cylinder bottom 11 side, so that the energy absorption effect is achieved, partial impact force in the compression process can be absorbed, and the impact feeling in the compression process of the piston valve 2 can be reduced.

In one of the embodiments, as shown in fig. 1, the damper mechanism 6 includes a float valve 61 slidably disposed in the cylinder tube 1 and an elastic member 62 for driving the float valve 61 to move toward the piston valve 2 side.

In the present embodiment, the damper mechanism 6 includes the float valve 61 and the elastic member 62, the edge of the float valve 61 seals with the inner surface of the cylinder 1, and the float valve 61 can be driven to move in the cylinder 1. The elastic member 62 is connected between the cylinder bottom 11 and the float valve 61, and is used to drive the float valve 61 to move toward the piston valve 2 side. That is, when the piston valve 2 is compressed and contacts the float valve 61, the piston valve 2 moves the float valve 61 toward the cylinder bottom 11, thereby achieving an effect of damping the movement of the piston valve 2 toward the cylinder bottom 11.

In this embodiment, the damping may be generated mainly by friction between the float valve 61 and the cylinder 1, or mainly by the elastic member 62, and may be set according to specific needs. A through hole may be provided in the float valve 61 for the passage of hydraulic oil, as required.

In one embodiment, as shown in fig. 1 and 4-8, an extension rod 4 extends from the piston valve 2 toward one side of the float valve 61.

The float valve 61 has a float valve through hole 611 for passing the extension rod 4 therethrough.

The extension rod 4 is connected with a sealing valve 5 which can seal the floating valve through hole 611 and can drive the floating valve 61 to move towards the cylinder bottom 11 side.

The sealing valve 5 is provided with a sealing valve through hole 51 for passing hydraulic oil.

In the present embodiment, an extension rod 4 is further provided on the piston valve 2, and extends toward the float valve 61 side. The extension rod 4 is provided with a sealing valve 5, the sealing valve 5 is provided with a sealing valve through hole 51, and the sealing valve through hole 51 is a micropore and is used for allowing hydraulic oil on two sides of the sealing valve 5 to pass through, so that a damping effect is achieved. The float valve 61 has a float valve through hole 611 for passing the extension rod 4 therethrough.

In this embodiment, the damping force generated by the hydraulic oil passing through the sealing valve through hole 51 is greater than the damping force generated by the float valve 61 and the elastic member 62, and the elastic member 62 mainly functions to support the float valve 61.

In a normal state, the sealing valve 5 is located above the floating valve 61, and the sealing valve 5 is away from the floating valve through hole 611.

When the piston valve 2 is compressed, as the piston valve 2 moves toward the cylinder bottom 11, the extension rod 4 moves the sealing valve 5 integrally, and the sealing valve 5 enters the floating valve through hole 611 and seals the floating valve through hole 611. At this time, the hydraulic oil below the sealing valve 5 flows to above the sealing valve 5 through the sealing valve through hole 51, generating a main damping force that damps the downward movement of the piston valve 2.

In one embodiment, as shown in fig. 1 and 4-8, the damping mechanism 6 further includes a mounting seat 63 fixedly installed in the cylinder 1 and capable of providing a limit to the movement of the float valve 61, and the elastic member 62 is connected between the mounting seat 63 and the float valve 61.

In this embodiment, the damping mechanism 6 further comprises a mounting seat 63, and the mounting seat 63 is fixedly mounted in the cylinder, which is located below the float valve 61. The elastic member 62 is connected between the mount 63 and the float valve 61.

The mounting seat 63 may provide a limit to the downward movement of the float valve 61. When the float valve 61 contacts the mounting seat 63, it indicates that the piston valve 2 is compressed down to the limit position.

In one embodiment, as shown in fig. 1 and 4-8, the mounting seat 63 has a mounting seat through hole 631 for passing the extension rod 4.

When the float valve 61 is moved to the limit position by the seal valve 5, the end of the extension rod 4 can be inserted into the mounting seat through hole 631 without obstructing the downward movement of the float valve 61, so as to ensure that the float valve 61 can contact the mounting seat 63 and be limited by the mounting seat 63.

In one embodiment, as shown in fig. 1 and fig. 4 to 8, the mounting seat 63 is spaced from the bottom 11 by a predetermined distance to provide a space for the extension rod 4 to move downwards, so as to prevent the extension rod 4 from impacting the bottom 11.

In one embodiment, the elastic member 62 is an expansion spring, which is assembled between the mounting seat 63 and the float valve 61, and is used for driving the float valve 61 to move towards the piston valve 2 side, and has good elastic performance and convenient assembly.

In one embodiment, the piston rod 3 is integrally formed with the extension rod 4. The piston rod 3 and the extension rod 4 are all metal pieces, can be integrally cast and formed, are convenient to process and have high structural strength.

In one embodiment, as shown in fig. 1 and fig. 4 to 8, the cross section of the float valve through hole 611 in the axial direction of the cylinder tube 1 is trapezoidal, and the radius of the float valve through hole 611 becomes gradually smaller in the direction from the piston valve 2 to the mount base 63.

The radius of the sealing valve 5 is larger than the minimum radius of the floating valve through hole 611 and smaller than the maximum radius of the floating valve through hole 611.

In this embodiment, the floating valve through hole 611 is wide at the top and narrow at the bottom, so that the sealing valve 5 can conveniently enter the floating valve through hole 611 and can seal the floating valve through hole 611. The floating valve through hole 611 wide at the top and narrow at the bottom also has a self-positioning function for the incoming sealing valve 5, and as long as the radius of the sealing valve 5 is larger than the radius of the bottom opening of the floating valve through hole 611 and smaller than the radius of the top opening of the floating valve through hole 611, the sealing valve 5 can automatically stop and seal in the floating valve through hole 611.

In one embodiment, as shown in fig. 1 and 4 to 8, the sealing valve 5 has a trapezoidal cross section along the axial direction of the cylinder 1, and the radius of the sealing valve 5 becomes gradually smaller in the direction from the piston valve 2 to the mounting seat 63.

Wherein the maximum radius of the sealing valve 5 is smaller than that of the floating valve through hole 611, and the minimum radius of the sealing valve 5 is larger than that of the floating valve through hole 611.

In this embodiment, the sealing valve 5 also has a structure with a wide top and a narrow bottom, and the contour shape of the sealing valve 5 is matched with the floating valve through hole 611, so that when the sealing valve 5 enters the floating valve through hole 611, the surfaces of the sealing valve and the floating valve through hole can be attached to each other, and the sealing effect is good.

To sum up, the shock absorber device that this application provided disposes buffer gear in the cylinder, and when the piston rod was compressed, the piston rod drove the piston valve and moves towards the section of thick bamboo bottom side, and buffer gear damping piston valve's motion, buffer gear play the energy-absorbing effect, can absorb the piston valve by the partial impact force of compression in-process, can reduce the impact that is feeling at piston valve compression.

According to the needs, the above technical schemes can be combined to achieve the best technical effect.

The foregoing is considered as illustrative only of the principles and preferred embodiments of the utility model. It should be noted that, for those skilled in the art, several other modifications can be made on the basis of the principle of the present invention, and the protection scope of the present invention should be regarded.

Claims

1. A shock absorber device, comprising a cylinder, a piston valve slidably disposed in said cylinder, and a piston rod connected to said piston valve;

and a buffer mechanism for damping the piston valve to move towards the bottom side of the cylinder barrel is further installed in the cylinder barrel, and the buffer mechanism is located between the bottom of the cylinder barrel and the piston valve.

2. The shock absorber device as set forth in claim 1 wherein said damper mechanism includes a float valve slidably disposed in said cylinder tube and an elastic member for driving said float valve toward said piston valve side.

3. The shock absorber device as set forth in claim 2 wherein an extension rod extends from said piston valve toward a side of said float valve;

4. A shock absorber device as set forth in claim 3 wherein said cushioning mechanism further includes a mounting block fixedly mounted in said cylinder and capable of providing a limit to movement of said float valve, said resilient member being connected between said mounting block and said float valve.

5. The vibration damper apparatus according to claim 4 wherein said mount has a mount through hole for said extension rod to pass through.

6. The damper device of claim 5, wherein the mount is spaced a predetermined distance from the canister base.

7. A damper device according to claim 2, wherein said elastic member is an expansion spring.

8. A shock absorber device as set forth in claim 3 wherein said piston rod is integrally formed with said extension rod.

9. The shock absorber device as set forth in claim 4, wherein a cross section of said float valve through hole along an axial direction of said cylinder tube is trapezoidal, and a radius of said float valve through hole becomes gradually smaller in a direction from said piston valve to said mount seat;

10. The shock absorber device according to claim 9, wherein a cross section of the sealing valve along the axial direction of the cylinder tube is trapezoidal, and a radius of the sealing valve becomes gradually smaller in a direction from the piston valve to the mounting seat;