CN216789089U

CN216789089U - Novel oil pressure shock absorber check valve piston assembly

Info

Publication number: CN216789089U
Application number: CN202220490381.6U
Authority: CN
Inventors: 王成国; 杨立举; 陆翠兴; 黄启伟
Original assignee: Shandong Lingborui Railway Transportation Technology Co ltd
Current assignee: Shandong Lingborui Railway Transportation Technology Co ltd
Priority date: 2022-03-08
Filing date: 2022-03-08
Publication date: 2022-06-21
Anticipated expiration: 2032-03-08

Abstract

The utility model relates to the field of oil pressure dampers of railway rolling stock, in particular to a piston valve system structure of an oil pressure damper of a high-speed train, and particularly provides a novel one-way valve piston assembly of the oil pressure damper. Its structure includes the piston body, and the piston body front portion has the valve block through stopper inlay card, stopper and valve block between set up conical spring, the piston body outside set up the piston seal cover, piston body rear portion set up piston ring and O type circle. According to the novel oil pressure damper one-way valve piston assembly, the assembly quality is improved, the assembly efficiency is improved and the problem that the oil pressure damper piston assembly is not easy to assemble is solved by improving the piston assembly structure.

Description

Novel oil pressure shock absorber check valve piston assembly

Technical Field

The utility model relates to the field of oil pressure dampers of railway rolling stock, in particular to a piston valve system structure of an oil pressure damper of a high-speed train, and particularly provides a novel one-way valve piston assembly of the oil pressure damper.

Background

The shock absorber is a key part of a high-speed train, and the damping characteristic of the shock absorber plays a key role in the running stability of the high-speed train. The structural design of the shock absorber adopts a single-cycle action type structure. The characteristics of structural design: in the stretching and compressing process, the oil only flows in one direction, the piston and the compression valve are both one-way valves, when the shock absorber is stretched, the oil pressure of the stretching cavity rises, the one-way valve on the piston closes, the one-way valve on the bottom valve opens, the oil in the stretching cavity on the upper part of the piston flows into the annular cavity of the oil storage cylinder through the throttling hole, meanwhile, the oil in the annular cavity of the oil storage cylinder flows into the compression cavity on the lower part of the piston through the bottom valve, when the shock absorber is compressed, the oil pressure of the compression cavity rises, the one-way valve on the bottom valve closes, the one-way valve on the piston opens, the oil in the compression cavity flows into the stretching cavity through the one-way valve, and the oil in the stretching cavity flows into the annular cavity of the oil storage cylinder through the throttling hole.

The existing sealing system of the piston valve of the shock absorber adopts a sealing strip material and a Glare ring sealing structure, and the sealing strip material needs to be assembled by a tool when the shock absorber is assembled, so that the assembly is difficult.

Disclosure of Invention

In order to solve the problems in the prior art, the utility model provides a novel piston assembly of a check valve of an oil pressure shock absorber, which improves the assembly quality and the assembly efficiency by improving the structure of the piston assembly and solves the problem that the piston assembly of the oil pressure shock absorber is difficult to assemble.

The technical scheme adopted by the utility model is as follows:

the utility model provides a novel oil damper check valve piston assembly, includes the piston body, the piston body front portion has the valve block through stopper card is inlayed, stopper and valve block between set up conical spring, the piston body outside set up the piston seal cover, piston body rear portion set up piston ring and O type circle.

Preferably, the piston body front end sets up the piston boss, the middle part outer wall of piston body on be provided with big cover annular, piston body rear portion set up the piston annular, the inside fluid passageway that is provided with a plurality of radial equipartitions of piston body, the preceding terminal surface of piston body and piston boss be used for the inlay card valve block and stopper, big cover annular be used for the installation the piston seal cover, the piston annular be used for the card solid piston ring and O type circle.

Preferably, the stopper comprises a stopper body, a piston hole is formed in the center of the stopper body, the piston hole is used for being clamped and embedded with the piston body, and a stopper hole is formed in the stopper body on the periphery of the piston hole.

Preferably, the valve plate comprises a valve plate body, a plurality of radially uniformly distributed grooves are formed in the valve plate body, the oil liquid channel is formed between the radially uniformly distributed grooves and the limiting stopper, a valve plate hole is further formed in the valve plate body, and the valve plate hole is matched with the piston boss in a clamping and embedding mode.

The technical scheme provided by the utility model has the following beneficial effects:

the check valve piston assembly can directly assemble the piston sealing sleeve with a circular ring structure on the piston by changing the structural design of the piston and the flow valve limiter, the piston sealing strip shape is improved into a piston sealing sleeve circular ring structure, the production and the installation are convenient, the internal leakage of oil between the working cylinder and the piston is reduced by matching the piston sealing sleeve and the working cylinder, the sealing of the piston sealing sleeve and the sealing of a piston ring form series sealing, the reliability of the sealing between the working cylinder and the piston is enhanced, the piston sealing sleeve with the circular ring structure is limited by the limiter to move axially, and the limiter is provided with a plurality of oil holes which are uniformly distributed in the radial direction at the position of an oil outlet, so that the oil and the liquid in the reciprocating motion of the shock absorber are ensured to be smooth. By changing the shape of the valve plate, the closing of the one-way valve can be more flexible and light, and the sealing performance between the valve plate and the orifice of the piston is better.

This patent is through optimizing piston assembly overall structure design, changes piston seal cover mounting means, has improved assembly efficiency, has reduced manufacturing cost, makes piston valve system working property more stable.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic structural view of a check valve piston assembly of a new type of oil pressure damper of the present invention;

FIG. 2 is a schematic diagram of a piston body structure of a check valve piston assembly of the new type of oil damper of the present invention;

FIG. 3 is a schematic diagram of a stopper structure of a check valve piston assembly of the new type oil damper of the present invention;

fig. 4 is a schematic view of an installation state of a check valve piston assembly of the novel oil pressure shock absorber.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Example one

As shown in the attached drawing 1, this embodiment provides a novel oil damper check valve piston assembly, including piston body 5, piston body 5 is anterior to have valve block 3 through 1 calorie of stopper, stopper 1 and valve block 3 between set up

conical spring

2, 5 outsides of piston body set up

piston seal cover

4, 5 rear portions of piston body set up piston ring 7 and O type circle 6.

As shown in fig. 2, the front end of the piston body 5 of this embodiment is provided with a piston boss 501, the outer wall of the middle part of the piston body 5 is provided with a sleeve ring groove 503, the rear part of the piston body is provided with a piston ring groove 504, the inside of the piston body 5 is provided with a plurality of oil passages 502 which are uniformly distributed in the radial direction, the front end face 505 of the piston body and the piston boss are used for clamping and embedding the valve plate and the stopper, the sleeve ring groove is used for installing the piston sealing sleeve, and the piston ring groove is used for clamping and fixing the piston ring and the O-ring.

As shown in fig. 3, the stopper 1 of the present embodiment includes a stopper body 101, a piston hole 102 is disposed in the center of the stopper body 101, the piston hole 102 is used for being engaged with the piston body 5, and a stopper hole 103 is disposed on the stopper body 101 at the periphery of the piston hole 102.

The valve plate of this embodiment includes valve plate body 301, valve plate body 301 on set up a plurality of radial equipartition recesses 302, radial equipartition recess 302 and stopper 1 between form fluid passageway 502, valve plate body 301 on still set up valve plate hole 303, valve plate hole 303 with piston boss 501 cooperation inlay card.

The piston sealing sleeve 4 is made of PTFE materials and has excellent performances of high strength, high lubrication, wear resistance and the like, the piston sealing sleeve 4 is of an annular sealing structure, the inner diameter of the piston sealing sleeve is matched with the outer ring notch of the piston body 5, the width of the ring notch of the piston sealing sleeve 4 is equal to that of the piston body 5, the end face of the piston sealing sleeve 4 is fixed on the end face of the limiter 1, and the check valve piston assembly is fixed with the piston rod through threaded connection.

Be equipped with a plurality of radial equipartition fluid passageways 502 on piston body 5, guarantee that the fluid circulation is smooth and easy, be equipped with piston boss 501, piston boss external diameter and piston hole 102 clearance fit, the assembly of being convenient for, terminal surface 505 closely laminates with valve block body 301's terminal surface before the piston, guarantees that oil damper closes completely at tensile in-process, does not have the oil leakage. The valve plate 3 is provided with a plurality of radially uniformly distributed grooves 302, a plurality of oil passages are formed between the valve plate and the limiter 1, and the valve plate hole 303 is matched with the outer diameter of the piston boss 501. The limiter 1 is used for fixing the piston sealing sleeve 4 and limiting the axial movement stroke of the valve plate, and a plurality of limiter holes 103 are formed in the limiter 1. The conical spring 2 is arranged between the limiter 1 and the valve plate 3 and is in a compressed state to provide pretightening force for the valve plate.

As shown in figure 4, in the process of the compression movement of the shock absorber, the oil pressure of a compression chamber rises, the conical spring 2 is compressed and deformed, the valve plate 3 is opened, and the oil flows from the compression chamber to the extension chamber. The piston sealing sleeve 4 and the piston ring are both contacted with the working cylinder to form series sealing.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The utility model provides a novel oil damper check valve piston assembly, includes the piston body, its characterized in that, the piston body front portion inlay through the stopper card and have the valve block, stopper and valve block between set up conical spring, the piston body outside set up the piston seal cover, piston body rear portion set up piston ring and O type circle.

2. The novel check valve piston assembly of the oil damper as claimed in claim 1, wherein the front end of the piston body is provided with a piston boss, the outer wall of the middle part of the piston body is provided with a jacket ring groove, the rear part of the piston body is provided with a piston ring groove, a plurality of oil passages which are radially and uniformly distributed are arranged inside the piston body, the front end surface of the piston body and the piston boss are used for clamping and embedding the valve plate and the stopper, the jacket ring groove is used for installing the piston seal sleeve, and the piston ring groove is used for clamping and fixing the piston ring and the O-shaped ring.

3. The piston assembly of the check valve of the new type oil hydraulic shock absorber according to claim 1 or 2, characterized in that the stopper comprises a stopper body, the center of the stopper body is provided with a piston hole, the piston hole is used for being embedded with the piston body, and the stopper body at the periphery of the piston hole is provided with a stopper hole.

4. The assembly as claimed in claim 2, wherein the valve plate comprises a valve plate body, the valve plate body has a plurality of radially disposed grooves, the oil passage is formed between the radially disposed grooves and the stopper, the valve plate body has a valve plate hole, and the valve plate hole is engaged with the piston boss.