CN209800603U

CN209800603U - Piston assembly for dual-cycle anti-snaking oil pressure shock absorber of high-speed motor car

Info

Publication number: CN209800603U
Application number: CN201822252839.0U
Authority: CN
Inventors: 张红伟; 吴旭; 吴彤
Original assignee: Zhuhai Yecheng Traffic Equipment Technology Co Ltd
Current assignee: Zhuhai Yecheng Traffic Equipment Technology Co Ltd
Priority date: 2018-12-29
Filing date: 2018-12-29
Publication date: 2019-12-17
Anticipated expiration: 2028-12-29

Abstract

The utility model relates to a piston assembly for anti snakeing oil hydraulic shock absorber of high-speed motor car dual cycle, include: the piston is provided with a channel through which oil flows through the piston, the channel is internally provided with a core valve, the core valve is provided with a limiting guide pillar integrally connected with the core valve, the end part of the limiting guide pillar is connected with a positioning pin in a matched manner, and the positioning pin is riveted and fixed with the piston. The utility model discloses change less to the piston assembly overall structure of shock absorber, increased less manufacturing cost, can solve the problem of former piston assembly internal leakage effectively, increased the stability of piston valve system during operation, satisfied the requirement of anti snake-running shock absorber to piston assembly, guaranteed the stability of anti snake-running shock absorber damping performance.

Description

Piston assembly for dual-cycle anti-snaking oil pressure shock absorber of high-speed motor car

Technical Field

The utility model relates to a high-speed motor car hydraulic component field especially relates to a be used for piston assembly for high-speed motor car bumper shock absorber.

Background

The oil pressure shock absorber is a key part on the rail vehicle, particularly an anti-snaking shock absorber, has extremely high technical content, and the quality of the working performance of the oil pressure shock absorber is directly related to the riding comfort and the safety of the rail vehicle. It has become a trend to install anti-hunting oleo dampers on trains and the rail companies have mandated that anti-hunting dampers must be installed on trains with speeds above 160 Km/h. In recent years, with the rapid development of the high-speed rail technology in China, the speed of the rail vehicle is continuously improved, the technical requirement on resisting the hunting damper is higher and higher, and the research on resisting the hunting damper by various scientific research institutions is also continuously deepened.

In previous studies, the anti-hunting damping performance was not controlled, one of the main reasons was internal leakage, and observing the piston structure of the previous anti-hunting shock absorbers, it was found that only two piston rings were sealed and both piston rings were tapered. The sealing structure can meet the use requirements of common vibration absorbers (a first vertical vibration absorber, a second horizontal vibration absorber and a second vertical vibration absorber), but when the structure is used in the anti-snaking vibration absorber, the pressure generated in the pressure cylinder is higher because the anti-snaking vibration absorber has a larger damping coefficient. Therefore, how to reduce or eliminate the internal leakage of the anti-snake-shaped vibration absorber is an urgent problem to be solved by vibration absorber manufacturers.

In addition, the anti-hunting shock absorber has a higher damping coefficient and a higher impact on the valve train, and therefore, the requirement for the stability of the valve train is higher.

Disclosure of Invention

In order to solve the problem, the utility model provides a piston assembly that is used for anti snake oil hydraulic shock absorber of high-speed motor car dual cycle, include: the piston is provided with a channel through which oil flows through the piston, the channel is internally provided with a core valve, the core valve is provided with a limiting guide pillar integrally connected with the core valve, the end part of the limiting guide pillar is connected with a positioning pin in a matched manner, and the positioning pin is riveted and fixed with the piston.

Furthermore, a plurality of groups of piston rings are arranged between the piston and the inner cylinder of the shock absorber, and a Glare ring is arranged between the adjacent piston rings.

Further, the piston ring and the GREEN ring are fixed in a groove on the outer side of the piston.

Further, a core valve spring is arranged on the core valve.

Further, an adjusting screw is arranged close to the core valve spring.

One advantage of the present invention is: the invention changes the whole structure of the piston component of the shock absorber less, increases less production cost, can effectively solve the problem of leakage in the original piston component, increases the stability of the piston valve system during working, meets the requirement of the anti-snaking shock absorber on the piston component, and ensures the stability of the damping performance of the anti-snaking shock absorber.

Drawings

FIG. 1 is a schematic diagram of a structure for improving the installation of a front piston assembly.

Fig. 2 is a schematic view of a modified front core valve.

Fig. 3 is a schematic view of the improved rear piston assembly mounting structure of the present invention.

Fig. 4 is the structural schematic diagram of the improved rear core valve of the present invention.

Fig. 5 is a schematic structural view of the new dowel of the present invention.

1-bottom valve seat, 2-compensation valve plate, 3-tower-shaped spring, 4-core valve seat, 5-bottom core valve, 6-adjusting screw, 7-gasket, 8-bottom valve spring, 9-snap spring and 10-spring stop.

Detailed Description

The piston assembly of the present invention for a dual cycle anti-hunting oleo damper for high speed motor cars will be described in further detail with reference to the accompanying drawings.

The structural schematic diagram of the improved front piston assembly installation shown in fig. 1 and the structural schematic diagram of the improved front core valve shown in fig. 2 are just because of the leakage problem in the shock absorber in the prior art, and only two piston rings 2 are provided to realize the sealing between the shock absorber inner cylinder and the piston 1. Obviously, for the anti-hunting shock absorber, because the damping coefficient is larger, the pressure generated inside the pressure tube is higher, the impact on the valve train is larger, and therefore the requirements on the sealing performance of the piston assembly and the stability of the valve train are higher. Therefore, under the condition of the original function of the piston assembly, the structure of the piston assembly is changed and optimized, so that the change of the damping performance of the shock absorber, which is influenced by the internal leakage between the piston assembly and the pressure cylinder, is reduced or even eliminated; and through changing the core valve structure, increase core valve locating pin 7, to improve the stability of valve system.

As shown in fig. 3, the utility model discloses improve back piston assembly mounting structure sketch map includes: piston 1 and core valve 5, be equipped with the passageway that fluid process piston 1 circulated on the piston 1, be provided with core valve 5 in the passageway, be provided with on the core valve 5 with the spacing guide pillar that core valve 5 integral type is connected, the tip and the locating pin 7 cooperation of spacing guide pillar are connected, locating pin 7 with piston 1 riveting fixed.

According to the embodiment of the utility model, the piston assembly of the invention is applied to the inside of the anti-snaking oil pressure shock absorber, and the piston assembly is provided with the groove on the outer side of the piston 1 and is additionally provided with the Glare ring 3 in cooperation with the piston rod and the pressure cylinder.

As shown in figure 4 the utility model discloses improve back core valve structure sketch map, change core valve 5 structure, increased spacing guide pillar on original core valve 5's basis to fixed on piston 1 with guide pillar complex dowel 7. Fig. 5 is a schematic structural diagram of the newly added dowel according to the present invention.

According to the utility model discloses an embodiment, be provided with multiunit piston ring 2 between piston 1 and shock absorber inner tube, it is adjacent still be provided with gley circle 3 between the piston ring 2. The piston ring 2 and the GREEN 3 are both fixed in a groove on the outer side of the piston 1.

According to the embodiment of the present invention, a core valve spring 6 is provided on the core valve 5. An adjusting screw 4 is also arranged close to the core valve spring 6. The adjusting screw 4 is used for adjusting the pressure of the valve core spring 6 so as to change the size of the working valve at the position, thereby changing the liquid flow rate of the valve passing through the valve core 5. The structural arrangement between the working valve and the core valve spring 6 belongs to the prior art, and is not described in detail again. The process the utility model discloses piston assembly's liquid flow direction is one-way, passes through the liquid flow opposite direction of 1 both sides of piston, and then is setting core valve 5 with need make corresponding position change according to the liquid flow direction during dowel 7.

According to the utility model discloses an embodiment, when carrying out anti snake-running piston assembly design, consider that anti snake-running shock absorber nominal speed is lower, the load is great, and damping coefficient is great promptly, and original piston structure can not satisfy anti snake-running shock absorber damping performance's requirement. In order to meet the requirement of the anti-snake motion shock absorber on the damping performance, the internal leakage between the piston assembly and the pressure cylinder must be reduced, so the GREEN 3 is added on the piston assembly while the original piston sealing and guiding structure is kept.

According to the utility model discloses an embodiment, because anti snake formula shock absorber, damping force is great, and fluid flow is great, and hydraulic oil is great to the impact of valve system, is the stability of during operation in order to guarantee the piston valve system. The structure of an original core valve 5 is changed, a limiting guide post is added on the core valve 5, and meanwhile, a positioning pin 7 of the core valve 5 is added on a piston body, so that the stability of a valve system during working is ensured.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Claims

1. A piston assembly for a dual cycle anti-hunting oleo damper for a high speed vehicle, comprising: the piston is provided with a channel through which oil flows through the piston, and the channel is internally provided with a core valve.

2. The piston assembly for a high speed dual cycle anti-hunting oleo damper according to claim 1, wherein a plurality of sets of piston rings are disposed between said piston and the inner damper cylinder, and wherein a gurley ring is disposed between adjacent ones of said piston rings.

3. The piston assembly for a high speed dual cycle anti-hunting oleo damper of claim 2, wherein said piston rings and said greige rings are each secured in a groove on the outside of said piston.

4. The piston assembly for a high speed dual cycle anti-hunting oleo damper according to claim 1, wherein a spool spring is provided on said spool.

5. The piston assembly for a high speed dual cycle anti-hunting oleo damper according to claim 4, further comprising an adjustment screw located proximate to said spool spring.