CN211693337U - Piston assembly of double-circulation oil pressure shock absorber for rail transit vehicle - Google Patents
Piston assembly of double-circulation oil pressure shock absorber for rail transit vehicle Download PDFInfo
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- CN211693337U CN211693337U CN201922465546.5U CN201922465546U CN211693337U CN 211693337 U CN211693337 U CN 211693337U CN 201922465546 U CN201922465546 U CN 201922465546U CN 211693337 U CN211693337 U CN 211693337U
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Abstract
The utility model relates to a rail transit vehicle is with piston assembly of dual cycle oil hydraulic shock absorber, include: the hydraulic damper comprises a piston body and one-way valve systems which are symmetrical to each other and are arranged on the piston body in an opposite direction, wherein the first one-way valve system is used for controlling damping force of the hydraulic damper at high speed, and the piston body is respectively provided with a stretching direction normal through hole and a compression direction normal through hole which are matched with the second one-way valve system and used for controlling the damping force of the hydraulic damper at low speed. Compared with the traditional structure, the piston assembly has the advantages that a set of one-way valve system is additionally arranged in each direction of stretching and compressing, the normally through hole which is formed in the piston body is matched with the one-way valve system, the normally through hole can be adjusted according to the desired damping force, the stretching and the damping force adjustment in the compression direction at low speed are completely distinguished, mutual influence is hardly caused, and the adjustment difficulty is reduced.
Description
Technical Field
The utility model belongs to the technical field of hydraulic component, concretely relates to rail transit vehicle is with piston assembly of dual cycle oil hydraulic shock absorber.
Background
The oil pressure shock absorber is a key part on a railway vehicle, in particular to a dual-cycle oil pressure shock absorber, which has extremely high technical content, the working performance of the oil pressure shock absorber is directly related to the riding comfort and the safety of the railway vehicle, the piston structure on the traditional shock absorber usually adjusts the damping force of the shock absorber at low speed through a normally through hole on an inner core valve of a piston valve system, and adjusts the damping force at high speed through a spring in the valve system, but at low speed, the stretching damping force and the compressing damping force are the interaction result of the normally through hole of the inner core valve of the piston stretching valve system and the normally through hole of the inner core valve of the piston compression valve system, when the size of the normally through hole of the stretching direction core valve is changed, the damping force in the compression direction can be influenced, and the adjustment of the low-speed damping force.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to prior art's is not enough, a rail transit vehicle is with piston assembly of dual cycle oil pressure shock absorber is proposed, this piston assembly compares with traditional structure, tensile and every direction of compression has all increased one set of check valve system, it is the normal through-hole of beating on the piston body to be the complex with the check valve system, normal through-hole can be according to the damping force size of wanting, adjust, tensile when the low-speed is distinguished completely with the damping force regulation of compression direction, can not influence each other hardly, the degree of difficulty of adjustment has been reduced, shock absorber damping performance's stability has been guaranteed.
For solving above-mentioned technical problem at least, the utility model discloses the technical scheme who takes does:
a piston assembly of a dual cycle oleo damper for a rail transit vehicle comprising: the hydraulic damper comprises a piston body and one-way valve systems which are symmetrical to each other and are reversely arranged on the piston body, wherein the first one-way valve system is used for controlling the damping force of the hydraulic damper at high speed, and the piston body is respectively provided with a stretching direction normal through hole and a compression direction normal through hole which are matched with the second one-way valve system and used for controlling the damping force of the hydraulic damper at low speed; the check valve system includes: the oil-gas separating valve comprises an adjusting screw, a core valve and a spring, wherein two ends of the spring are respectively abutted against the side wall of the piston body and one end of the core valve, the adjusting screw is arranged at the other end of the core valve, and an oil window is arranged on the side wall of the core valve and used for opening and closing the core valve.
Furthermore, the number of the first check valve systems is two.
Further, the piston ring is sleeved on the outer wall of the piston body.
The spring constant of the spring of the second check valve system is greater than the spring constant of the spring of the first check valve system.
The beneficial effects of the utility model include at least: compared with the traditional structure, the piston assembly has the advantages that one set of check valve system is additionally arranged in each direction of stretching and compressing, the normal through hole which is formed in the piston body is matched with the check valve system, the normal through hole can be adjusted according to the desired damping force, the stretching and the damping force adjustment in the compression direction at low speed are completely distinguished, almost no mutual influence is caused, the adjusting difficulty is reduced, and the stability of the damping performance of the shock absorber is guaranteed.
Drawings
Fig. 1 is a schematic structural diagram of the piston assembly according to the present invention.
Fig. 2 is a schematic structural diagram of the left end face of fig. 1.
Fig. 3 is a schematic diagram of the right end face structure of fig. 1.
The piston comprises a piston body 1, a first check valve system 2, a second check valve system 3, a tension direction constant through hole 4, a compression direction constant through hole 5, an adjusting screw 6, a core valve 7, an oil window 701, a spring 8 and a piston ring 9.
Detailed Description
In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the following specific embodiments. The following description of the embodiments is merely exemplary in nature and is in no way intended to limit the invention. The examples, where specific techniques or conditions are not indicated, are to be construed according to the techniques or conditions described in the literature in the art or according to the product specifications.
Example 1: fig. 1-3 are the piston assembly structure schematic diagram of the present invention, as shown in fig. 1-3, the piston assembly of the dual-cycle oil pressure shock absorber for rail transit vehicles mainly includes: piston body and each other are symmetrical and reverse setting in check valve system and piston ring on the piston body, wherein, check valve system includes: and the piston rings are sleeved on the outer wall of the piston body.
The first check valve system is used for controlling the damping force of the oil pressure shock absorber at a high speed, and the piston body is respectively provided with a tension direction normal through hole and a compression direction normal through hole which are matched with the second check valve system and used for controlling the damping force of the oil pressure shock absorber at a low speed, and how to control the damping force is described in detail below.
More specifically, the check valve system includes: adjusting screw, core valve and spring, the both ends of spring respectively with the lateral wall of piston body with the one end butt of core valve, adjusting screw set up in the other end of core valve, and the lateral wall of core valve is equipped with the fluid window:
when in a low-speed (whether stretching or compressing) state, because the elastic coefficient of the spring of the second one-way valve system is larger than that of the spring of the first one-way valve system, the oil window of the first one-way valve system is closed by the outer wall of the adjusting screw, while the spring of the second one-way valve system is easily compressed (only low-speed small-flow oil is needed), the core valve and the adjusting screw are separated from a contact state and generate relative displacement, namely the oil window and the outer wall of the adjusting screw are opened in a staggered way, oil respectively flows through the stretching direction normal through hole, the compressing direction normal through hole and the oil window, it can be understood that the caliber of the oil window is larger than the aperture of the two normal through holes, and because the spring of the second one-way valve system is easily compressed, damping force is hardly generated, and is mainly generated through the normal through hole arranged on the piston body, and the damping force of the oil pressure shock absorber at low speed can be controlled by controlling the size of the constant through hole.
When the hydraulic shock absorber is in a high-speed (no matter stretching or compressing) state, namely when a large amount of oil passes through, the oil is limited to flow through the two normally through holes in the piston body, at the moment, the spring of the first one-way valve system is compressed, the core valve and the adjusting screw are separated from a contact state and generate relative displacement, namely, the oil window and the outer wall of the adjusting screw are opened in a staggered mode, although the oil window of the second one-way valve system is also opened, almost no damping force is generated due to the fact that the elastic coefficient of the oil window is large, and the damping force is mainly generated by the first one-way valve system, namely the first one-way valve system controls the damping force of the hydraulic shock absorber at.
To sum up, the utility model discloses this piston assembly compares with traditional structure, and tensile and every direction of compression has all increased one set of check valve system, and with the check valve system complex be the normal through-hole of beating on the piston body, normal through-hole can be according to the damping force size of wanting, adjusts, and tensile when the low-speed is adjusted with the damping force of compression direction and is distinguished completely, can not influence each other hardly, has reduced the degree of difficulty of adjustment, has guaranteed the stability of shock absorber damping performance.
In the description of the present invention, it is to be understood that the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that various changes, modifications, substitutions and alterations can be made in the above embodiments by those skilled in the art without departing from the scope of the present invention, and that various changes in the detailed description and applications can be made by those skilled in the art without departing from the spirit of the present invention.
Claims (4)
1. A piston assembly of a dual cycle oleo damper for a rail transit vehicle, comprising: a piston body and a one-way valve system which is symmetrical with each other and is reversely arranged on the piston body, wherein,
the first one-way valve system is used for controlling the damping force of the oil pressure shock absorber at high speed, and the piston body is respectively provided with a stretching direction constant through hole and a compressing direction constant through hole which are matched with the second one-way valve system and used for controlling the damping force of the oil pressure shock absorber at low speed;
the check valve system includes: the oil-gas separating valve comprises an adjusting screw, a core valve and a spring, wherein two ends of the spring are respectively abutted against the side wall of the piston body and one end of the core valve, the adjusting screw is arranged at the other end of the core valve, and an oil window is arranged on the side wall of the core valve and used for opening and closing the core valve.
2. The piston assembly of claim 1 wherein said first series of one-way valves are two in number.
3. The piston assembly of claim 1, further comprising a piston ring disposed about an outer wall of said piston body.
4. The piston assembly of claim 1 wherein the spring rate of the spring of the second one-way valve train is greater than the spring rate of the spring of the first one-way valve train.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922465546.5U CN211693337U (en) | 2019-12-31 | 2019-12-31 | Piston assembly of double-circulation oil pressure shock absorber for rail transit vehicle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922465546.5U CN211693337U (en) | 2019-12-31 | 2019-12-31 | Piston assembly of double-circulation oil pressure shock absorber for rail transit vehicle |
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| CN211693337U true CN211693337U (en) | 2020-10-16 |
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| CN201922465546.5U Active CN211693337U (en) | 2019-12-31 | 2019-12-31 | Piston assembly of double-circulation oil pressure shock absorber for rail transit vehicle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112943835A (en) * | 2021-02-02 | 2021-06-11 | 中交公路长大桥建设国家工程研究中心有限公司 | Multi-stage displacement control type damper with intelligent monitoring function |
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2019
- 2019-12-31 CN CN201922465546.5U patent/CN211693337U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112943835A (en) * | 2021-02-02 | 2021-06-11 | 中交公路长大桥建设国家工程研究中心有限公司 | Multi-stage displacement control type damper with intelligent monitoring function |
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