CN211715633U

CN211715633U - Single-circulation-structure oil pressure damper bottom valve assembly for railway vehicle

Info

Publication number: CN211715633U
Application number: CN201922465610.XU
Authority: CN
Inventors: 莫焱森; 吴旭; 吴彤
Original assignee: Zhuhai Yecheng Rail Transit Equipment Technology Co ltd
Current assignee: Zhuhai Yecheng Rail Transit Equipment Technology Co ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-10-20
Anticipated expiration: 2029-12-31

Abstract

The utility model relates to a single loop construction oil pressure damper bottom valve subassembly is used to track vehicle, include: the oil-water separation valve comprises a bottom valve seat, a valve sheet, a spring, a pressing plate and a bottom valve cover, wherein the bottom valve seat is provided with an oil liquid channel, the valve sheet seat, the valve sheet and the spring are sequentially arranged in the oil liquid channel, the valve sheet seat is provided with an oil liquid through hole, and the outer edge of the valve sheet is provided with a groove; the middle part of clamp plate is equipped with the fluid hole, the clamp plate set up in the top of fluid passageway and with the spring butt makes the spring has the pretightning force. The valve block can not generate great noise during high-frequency movement; the sealing surfaces of the valve plate and the valve plate seat are arranged in the bottom valve seat, so that the sealing surfaces are not easy to collide and damage; in addition, the valve plate seat matched with the valve plate is of a detachable structure, can be detached and replaced after being damaged, cannot cause scrapping of the whole bottom valve seat, and is favorable for product maintenance.

Description

Single-circulation-structure oil pressure damper bottom valve assembly for railway vehicle

Technical Field

The utility model belongs to the technical field of oil pressure shock absorber for rail vehicle, concretely relates to single loop configuration oil pressure shock absorber bottom valve subassembly for rail vehicle.

Background

The oil pressure vibration absorber for the rail vehicle is used for reducing vehicle suspension vibration, ensuring that the rail vehicle safely and stably runs on a line, and improving the riding comfort of passengers. The oil pressure vibration absorber can be divided into a single-circulation oil pressure vibration absorber and a double-circulation oil pressure vibration absorber according to the flowing direction of oil liquid when the vibration absorber moves, the vibration absorber with the consistent oil liquid flowing direction when the vibration absorber moves in a stretching mode and a compressing mode is called a single-circulation vibration absorber, and the vibration absorber with the inconsistent oil liquid flowing direction when the vibration absorber moves in the stretching mode and the compressing mode is called a double-circulation vibration absorber. The single-circulation structure oil pressure damper bottom valve has the functions that: the check valve is opened when the shock absorber is in stretching motion to supply oil to the working cylinder, and is closed when the shock absorber is in compression motion to ensure that the oil in the inner cylinder does not leak from the bottom valve. The existing single-cycle structure shock absorber bottom valve component still has the following problems: 1. the integrated valve plate is adopted, the weight of the valve plate is large, and the valve plate impacts the bottom valve seat when the shock absorber moves at high frequency, so that great noise can be generated, and the riding comfort of passengers is influenced; 2. the matching surface of the valve plate and the bottom valve seat is large, the matching precision requirement is high, and the processing requirement is high; 3. the matching surface of the valve plate and the bottom valve seat is easy to be collided/impacted and damaged, and the damaged valve plate is difficult to repair and easy to scrap, so that the manufacturing/overhauling cost is increased.

SUMMERY OF THE UTILITY MODEL

The utility model provides a single circulation structure oil pressure damper bottom valve assembly for a rail vehicle, aiming at the defects of the prior art, the oil pressure damper bottom valve assembly adopts a plurality of groups of small valve plate type structures, the valve plate can not generate great noise when the oil pressure damper moves at high frequency, the sealing surface area of the valve plate is small, the processing difficulty is low, and the realization is easy; the sealing surfaces of the valve plate and the valve plate seat are arranged in the bottom valve seat, so that the sealing surfaces are not easy to collide and damage; in addition, the valve plate seat matched with the valve plate is of a detachable structure, can be detached and replaced after being damaged, cannot cause scrapping of the whole bottom valve seat, and is favorable for product maintenance.

For solving one of above-mentioned technical problem at least, the utility model discloses the technical scheme who takes is:

a single cycle structure oil damper foot valve assembly for a rail vehicle, comprising: the oil-gas separation device comprises a bottom valve seat, a valve sheet, a spring, a pressing plate and a bottom valve cover, wherein the bottom valve seat is provided with an oil liquid channel, the valve sheet seat, the valve sheet and the spring are sequentially arranged in the oil liquid channel, the valve sheet seat is provided with an oil liquid through hole, the outer edge of the valve sheet is provided with a groove, the groove is sealed by the valve sheet seat in a compression state, and the valve sheet moves upwards to enable the groove and the inner wall of the oil liquid channel to form a through-flow gap in a stretching state; the middle part of clamp plate is equipped with the fluid hole, the clamp plate set up in the top of fluid passageway and with the spring butt makes the spring has the pretightning force.

Furthermore, the bottom valve cover is arranged above the pressing plate and used for pressing and fixing the pressing plate.

Furthermore, the middle part of the bottom valve seat is provided with a thread groove which is in threaded connection with the thread bulge of the bottom valve cover.

Furthermore, the inner wall of the oil passage is provided with a boss, and the valve plate seat is in interference fit with the boss, so that the valve plate is convenient to assemble and disassemble.

Furthermore, a plurality of grooves are annularly distributed on the outer edge of the valve plate.

Furthermore, the valve plate is of a star-shaped structure.

Further, the number of the oil passages is odd or even.

Furthermore, the oil passages are four and are uniformly distributed along the center of the bottom valve seat.

The beneficial effects of the utility model include at least:

1) a plurality of groups of small valve plate structures are adopted to replace the prior large valve plates, so that the shock absorber is ensured not to generate great noise (impact sound between the closed valve plates and the bottom valve seat) in the motion process;

2) the valve plate sealing surface area is small, the processing difficulty is low, and the valve plate sealing structure is easy to realize;

3) the sealing surfaces of the valve plate and the valve plate seat are arranged in the bottom valve seat, and the sealing surfaces are not easy to collide and damage;

4) the valve plate seat matched with the valve plate is of a detachable structure, can be detached and replaced after being damaged, cannot cause scrapping of the whole bottom valve seat, and is favorable for product maintenance.

Drawings

Fig. 1 is a schematic structural view of the bottom valve assembly of the present invention.

Fig. 2 is a top view of fig. 1.

Fig. 3 is the schematic view of the structure of the valve plate of the present invention.

Fig. 4 is an assembly view of the valve plate of the present invention.

Fig. 5 is the working principle diagram of the bottom valve assembly of the present invention.

The valve comprises a bottom valve seat 1, an oil passage 101, a boss 102, a valve plate seat 2, an oil through hole 201, a valve plate 3, a groove 301, a through flow gap 302, a spring 4, a pressing plate 5, an oil hole 501, a bottom valve cover 6, a piston rod 7, a piston 8, oil 9 and an inner cylinder 10.

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. 1-4 show the structural schematic diagram of the bottom valve assembly of the present invention, it can be understood that the bottom valve assembly is composed of a bottom valve seat, a check valve, a pressing plate and a bottom valve cover, the bottom valve assembly adopts a multi-group nested check valve structure, the check valve is composed of a valve sheet seat, a spring and a valve sheet, several groups (4 groups or other groups) of check valves are uniformly distributed (non-uniformly distributed) along the center of the bottom valve seat, and in this embodiment, 4 groups of check valves are preferred to be described, as shown in fig. 2.

In this embodiment, as shown in fig. 1, the bottom valve seat is provided with an oil passage, a valve plate seat, a valve plate and a spring are sequentially arranged in the oil passage, the valve plate seat is provided with an oil through hole, the outer edge of the valve plate is provided with a groove, the valve plate is in close contact with the valve plate seat in a compression state, the groove is sealed by the valve plate seat, and the valve plate moves upwards to form a through-flow gap between the groove and the inner wall of the oil passage in a tension state; the middle part of clamp plate is equipped with the fluid hole, the clamp plate set up in the top of fluid passageway and with the spring butt makes the spring has the pretightning force.

The bottom valve cover is arranged above the pressing plate and used for pressing and fixing the pressing plate.

The middle part of the bottom valve seat is provided with a thread groove which is in threaded connection with the thread bulge of the bottom valve cover.

The inner wall of the oil passage is provided with a boss, and the valve disc seat is in interference fit with the boss and is pressed in for assembly or pressed out for disassembly by a tool.

The concrete shape of valve block is unrestricted, can guarantee for star type structure or other can with the contact the end valve seat fluid passageway the inner wall can contact the location and have the shape in through-flow clearance with the pore wall, as shown in fig. 3 and 4, a plurality of recesses have been laid along the spacer ring to the outer edge of valve block.

Referring to fig. 5, the operating principle of the bottom valve assembly of the present invention is: when the oil pressure damper stretches, as shown by arrows in the figure, due to pressure difference, a valve plate on a bottom valve seat is opened, oil outside the inner cylinder flows into the inner cylinder through oil holes in the valve plate seat, the valve plate and the pressure plate, and the oil flows to the path I as shown in the figure; when the oil pressure damper is compressed, the valve plate is closed to prevent oil from flowing out of the inner cylinder through the bottom valve.

In summary, the bottom valve assembly of the utility model adopts a multi-group small valve piece type structure, the valve piece can not generate great noise when the oil pressure damper moves at high frequency, and the sealing surface area of the valve piece is small, the processing difficulty is low, and the realization is easy; the sealing surfaces of the valve plate and the valve plate seat are arranged in the bottom valve seat, so that the sealing surfaces are not easy to collide and damage; in addition, the valve plate seat matched with the valve plate is of a detachable structure, can be detached and replaced after being damaged, cannot cause scrapping of the whole bottom valve seat, and is favorable for product maintenance.

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

1. A single circulation structure oil damper base valve assembly for a rail vehicle, comprising: a bottom valve seat, a valve sheet, a spring, a pressure plate and a bottom valve cover, wherein,

the bottom valve seat is provided with an oil passage, a valve plate seat, a valve plate and a spring are sequentially arranged in the oil passage, the valve plate seat is provided with an oil through hole, the outer edge of the valve plate is provided with a groove, the groove is sealed by the valve plate seat in a compression state, and the valve plate moves upwards to enable the groove and the inner wall of the oil passage to form a through-flow gap in a stretching state;

the middle part of clamp plate is equipped with the fluid hole, the clamp plate set up in the top of fluid passageway and with the spring butt makes the spring has the pretightning force.

2. The single-circulation-structure oil damper bottom valve assembly for a rail vehicle according to claim 1, wherein the bottom valve cover is disposed above the pressing plate and used for pressing and fixing the pressing plate.

3. The single-cycle structure oil damper base valve assembly for a railway vehicle as claimed in claim 2, wherein a threaded groove is formed in a middle portion of the base valve seat and is threadedly coupled to a threaded protrusion of the base valve cover.

4. The single-circulation-structure oil damper base valve assembly for the rail vehicle as claimed in claim 1, wherein a boss is provided on an inner wall of the oil passage, and the valve seat is in interference fit with the boss for easy assembly and disassembly.

5. The single-circulation-structure oil damper base valve assembly for the rail vehicle as claimed in claim 1, wherein a plurality of grooves are formed on the outer edge of the valve plate by spacing rings.

6. The single-cycle structure oil damper base valve assembly for a rail vehicle of claim 5, wherein the valve plate is of a star-shaped structure.

7. The single-cycle structure oil pressure damper base valve assembly for a rail vehicle as claimed in claim 4, wherein the number of the oil passages is odd or even.

8. The single-cycle structure oil damper base valve assembly for a rail vehicle of claim 7, wherein the number of the oil passages is four, and the oil passages are evenly distributed along the center of the base valve seat.