A piston valve assembly of a one-way flow structure shock absorber

Abstract

A piston valve assembly of a one-way flow structure shock absorber effectively solves the problem that the existing shock absorber piston valve has a small application range and is inconvenient to install; it includes a cylinder body, in which a piston rod and a piston are connected by a threaded screwing and nesting method, the side wall of the piston cavity is clearance-matched with the valve cover, and the step surface of the piston cavity is supported by the limit valve cover end face position, the step surface of the disc valve cavity is fitted with the lower end face of the spring, and the lower end face of the spring is limited by the table, and at the same time, the circumferential side of the disc valve is clearance-matched with the side wall of the cavity in the valve cover and can slide freely, the valve seat is screwed with the piston thread, and at the same time, the circumferential rib position of the valve cover end face is clamped, and at the same time, the end face of the valve seat is fitted with the end face of the disc valve, and the lower end face of the disc valve is limited. Two piston rings and the gray ring are embedded in the groove of the piston side wall and fit with the inner wall of the cylinder body; this structure is simple, novel in conception, easy to use, and highly practical.

Description

Technical Field

[0001] The utility model relates to the technical field of shock absorbers, in particular to a piston valve assembly of a shock absorber with a one-way flow structure. Background Art

[0002] At present, in the field of shock absorbers, during the process of debugging the damping characteristics of the one-way flow structure shock absorber, the shock absorber body valve system can be kept intact. By applying various types of external adjustable damping valve systems, the damping characteristics can be adjusted to match the product damping requirements, and the product characteristics can be adjusted in real time as needed during the debugging process. At present, the piston valve assembly used in this type of one-way flow structure shock absorber is mainly valve plate type. The common structural form of this type of piston valve assembly is that the middle hole of the piston penetrates into the piston rod, and the piston is locked at the end of the piston rod by a nut. The working mode is to adjust the opening and closing of the valve plate and the oil line through the joint action of the spring, valve plate and the oil line on the surface of the piston to achieve the function of controlling the flow of oil in the working cylinder.

[0003] However, this type of shock absorber has the following defects when in use: this type of piston valve assembly requires a longer product base length and cannot be applied to shock absorbers with a shorter stroke; if the overall thickness of the piston is shortened, the supporting and guiding effect of the piston valve assembly on the piston rod will be reduced, which may easily cause abnormalities in the shock absorber product. Therefore, the application scope of this type of structural piston valve will be greatly limited; and the installation and disassembly between the piston valve and the piston rod require nut fixing, which is cumbersome to operate. Utility Model Content

[0004] In view of the above situation, in order to make up for the deficiencies of the prior art, the purpose of the utility model is to provide a piston valve assembly of a one-way flow structure shock absorber, which effectively solves the problem that the existing shock absorber piston valve has a small application range and is inconvenient to install.

[0005] The technical solution is as follows: the utility model comprises a cylinder body, in which a piston rod and a piston connected by a threaded screw-on nesting manner are arranged, the side wall of the inner cavity of the piston and the valve cover are clearance matched, and the step surface of the inner cavity of the piston is supported by the position of the end face of the valve cover to limit the position of the spring, the spring is placed in the inner cavity of the valve cover, fits with the step surface of the inner cavity of the valve cover, and the upper end face of the spring is limited by the step surface, the step surface of the inner cavity of the disc valve fits with the lower end face of the spring, and the lower end face of the spring is limited by the table surface, and at the same time, the circumferential side face of the disc valve and the side wall of the inner cavity of the valve cover are clearance matched and can slide freely, the valve seat is connected to the piston threaded screwing, and at the same time clamps the circumferential rib of the end face of the valve cover, and at the same time, the end face of the valve seat fits with the end face of the disc valve and limits the lower end face of the disc valve; two piston rings and the grid ring are embedded in the grooves of the side walls of the piston and fit with the inner wall of the cylinder body.

[0006] Compared with the prior art, the beneficial effects of the utility model are: it can achieve the purpose of absorbing kinetic energy and buffering shock absorption; compared with the traditional one-way flow structure shock absorber piston valve, the shock absorber piston valve assembly occupies a shorter base length of the product, which can significantly improve the application scope of such piston valves and has a wider applicability; at the same time, the piston rod is easy to install and operate relative to the piston, and it saves time and effort. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is the main axonometric drawing of the utility model.

[0008] Figure 2 It is an axonometric view of the piston rod in the utility model.

[0009] Figure 3 It is an axonometric diagram of the piston in the utility model.

[0010] Figure 4 It is a structural schematic diagram of the valve cover in the utility model.

[0011] Figure 5 It is a structural schematic diagram of the spring in the utility model.

[0012] Figure 6 It is a structural schematic diagram of the center disc valve of the utility model.

[0013] Figure 7 It is a structural schematic diagram of the valve seat in the utility model.

[0014] Reference numerals:

[0015] 1. Cylinder body 1, piston rod 2, piston 3, piston ring 4, valve seat 5, Gley ring 6, disc valve 7, spring 8, valve cover 9;

[0016] 2. Piston rod: end outer wall thread 2001, inner wall thread 2002, piston rod first step surface 2003, inner ring side wall surface 2004, outer end surface 2005;

[0017] 3. Piston: piston outer wall thread 3001, second annular outer side surface 3002, piston circulation channel 3003, first annular groove 3004, second annular groove 3005, third annular groove 3006, process blind hole 3007, inner cavity side wall thread 3008, first annular step surface 3009, inner cavity side wall inner annular surface 3010, second annular step surface 3011, annular step rib position 3012;

[0018] 4. Valve cover: valve cover flow channel 8001, outer side wall step surface 8002, annular rib 8003, valve cover first step surface 8004, first annular side surface 8005, second annular side surface 8006, valve cover inner concave circular plane 8007;

[0019] 5. Spring: Spring upper end plane 9001, spring lower end plane 9002

[0020] 6. Disc valve: disc valve upper end plane 7001, disc valve lower end plane 7004, disc valve inner concave circular plane 7002, cylindrical side wall surface 7003;

[0021] 7. Valve seat: first circular end face 5001, annular inner groove 5002, second circular end face 5003, third circular end face 5004, valve seat outer side wall thread 5005, inner hexagonal groove 5006. DETAILED DESCRIPTION

[0022] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model. Therefore, the utility model is not limited to the basic implementation disclosed below.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0024] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings.

[0025] Depend on Figures 1 to 7The invention provides a cylinder body 1, wherein a piston rod 2 and a piston 3 are connected by threaded screwing and nesting. The side wall of the inner cavity of the piston 3 and the valve cover 8 are clearance matched, and the step surface of the inner cavity of the piston 3 is supported by the end face position of the valve cover 8. The spring 9 is placed in the inner cavity of the valve cover 8, and fits with the step surface of the inner cavity of the valve cover 8, and the step surface limits the upper end face of the spring. The step surface of the inner cavity of the disc valve 7 fits with the lower end face of the spring 9, and the table limits the lower end face of the spring. At the same time, the circumferential side of the disc valve 7 and the side wall of the inner cavity of the valve cover 8 are clearance matched and can slide freely. The valve seat 5 is threadedly connected with the piston 3, and the circumferential rib position of the end face of the valve cover 8 is clamped at the same time. At the same time, the end face of the valve seat 5 fits with the end face of the disc valve 7, and limits the lower end face of the disc valve 7. Two piston rings 4 and the gray ring 6 are embedded in the groove of the piston side wall and fit with the inner side wall of the working cylinder.

[0026] Preferably, an outer wall thread 2001 is provided on the outer wall of the end of the piston rod 2, and the other end is an internal hollow structure and is provided with an inner wall thread 2002, an inner ring side wall surface 2004 is provided near the end, a first step surface 2003 of the piston rod is provided between the inner wall thread 2002 and the inner ring side wall surface 2004, and an outer end surface 2005 is provided.

[0027] Preferably, the outer wall of the end of the piston 3 is provided with a piston outer wall thread 3001, and a second annular outer surface 3002 is provided at the end, the main valve body part of the piston 3 is an internal cavity structure, and a plurality of piston circulation channels 3003 are provided to communicate with the inner cavity, the outer surface of the main valve body of the piston 3 is a first annular groove 3004, a second annular groove 3005, and a third annular groove 3006, a plurality of process blind holes 3007 are provided on the lower end surface of the piston 3 for installing the piston 3, an inner cavity side wall thread 3008 is provided on the inner cavity side wall of the piston 3, an inner cavity side wall inner ring surface 3010 is provided on the inner cavity side wall, a first annular step surface 3009 is provided between the inner cavity side wall thread 3008 and the inner cavity side wall inner ring surface 3010, a second annular step surface 3011 is provided between the inner cavity side wall inner ring surface 3010 and the inner cavity, and the lower end surface of the piston 3 is a concave structure, and an annular step rib position 3012 is provided.

[0028] Preferably, a plurality of valve cover circulation channels 8001 are arranged at the end of the valve cover 8, an annular rib 8003 is arranged at the other end, a first annular side surface 8005 is arranged on the inner wall of the annular rib 8003, an outer wall step surface 8002 is arranged between the annular rib 8003 and the outer wall of the valve cover, a valve cover first step surface 8004 is arranged between the hollow part inside the valve cover and the annular rib 8003, a second annular side surface 8006 is arranged on the side wall of the valve cover first step surface 8004, and a valve cover inner concave circular plane 8007 is arranged on the bottom surface of the valve cover 8.

[0029] Preferably, the two ends of the spring 9 are respectively arranged as a spring upper end plane 9001 and a spring lower end plane 9002 .

[0030] Preferably, the two ends of the disc valve 7 are respectively arranged as a disc valve upper end plane 7001 and a disc valve lower end plane 7004 , a disc valve inner concave circular plane 7002 is arranged at the center of the disc valve, and the side wall of the disc valve is a cylindrical side wall surface 7003 .

[0031] Preferably, the valve seat 5 is provided with an annular inner groove 5002, the first circular end face 5001 and the second circular end face 5003 are equal height planes, the third circular end face 5004 is provided higher than the second circular end face 5003, the outer wall of the valve seat 5 is provided with a valve seat outer wall thread 5005, and the back end face of the valve seat is provided with an inner hexagonal groove 5006.

[0032] Preferably, a sealing piston ring 4 is provided at the first annular groove 3004 and the third annular groove 3006 on the outer side wall of the piston 3 , and a sealing Gly ring 6 is provided at the second annular groove 3005 .

[0033] When the utility model is in use, firstly, the cylinder body 1 is filled with oil, and the cylinder body 1 and the left end of the piston rod 2 are fixed respectively. When encountering vibration, the piston rod 2 moves to the right in the cylinder body, and at the same time, the piston rod 2 drives the piston 3 to move to the right, wherein the piston ring 4 and the grid ring 6 can increase the sealing performance to prevent the oil in the cylinder body 1 from flowing between the piston 3 and the cylinder body 1. At the same time, due to the rightward movement of the piston 3, the shock-absorbing oil in the cylinder body 1 is squeezed, and the shock-absorbing oil is squeezed into the disc valve 7, and then the spring 9 is pushed to the left. At this time, the disc valve 7 is connected, and the shock-absorbing oil located on the right side of the piston 3 enters the left side of the piston 3 through the piston circulation channel 3003.

[0034] When the piston rod 2 moves to the left in the cylinder body, the piston rod 2 drives the piston 3 to move to the left at the same time. The piston ring 4 and the grid ring 6 can increase the sealing performance to prevent the oil in the cylinder body 1 from flowing between the piston 3 and the cylinder body 1. At the same time, due to the movement of the piston 3 to the left, the shock-absorbing oil on the left side of the cylinder body 1 squeezes the disc valve 7, and the spring 9 pushes to the right. At this time, the disc valve 7 is closed, and the shock-absorbing oil on the left side of the piston 3 flows to the left, and the shock-absorbing oil on the right side of the piston 3 flows to the left and is replenished into the cylinder body 1. Through the above-mentioned cyclic motion process, the purpose of controlling the unidirectional flow of oil is achieved.

[0035] Compared with the prior art, the utility model has the following beneficial effects: the piston, piston rod, spring, etc. are provided, and the two structures are connected by threaded screwing and nesting by adjusting the structural form of the piston rod and the piston, and the structural form of the piston is adjusted to increase the position of the annular step ribs, thereby improving the support and guiding effect of the piston valve assembly on the shock absorber piston rod, and at the same time, there is no need to use nuts to fix the piston valve assembly. Compared with the traditional one-way flow structure shock absorber piston valve, the shock absorber piston valve assembly occupies a shorter base length of the product, which can significantly improve the application scope of such piston valves and has a wider applicability. At the same time, the piston rod is easy to install and operate relative to the piston, which saves time and effort. This structure is simple, novel in conception, easy to use, and highly practical.

[0036] It should be pointed out that, according to the needs of implementation, the various components described in the embodiments of the present utility model can be split into more components, or two or more components or parts of components can be combined into new components to achieve the purpose of the embodiments of the present utility model.

[0037] The above embodiments only express several implementation methods of the utility model, and the descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A piston valve assembly of a one-way flow structure shock absorber, characterized in that: The invention comprises a cylinder body (1), wherein a piston rod (2) and a piston (3) are provided in the cylinder body (1), the piston rod (2) and the piston (3) being connected by a threaded screwing nesting manner, the side wall of the inner cavity of the piston (3) and the valve cover (8) being clearance-matched, and the step surface of the inner cavity of the piston (3) is supported against the end surface of the valve cover (8) to limit the position, the spring (9) is placed in the inner cavity of the valve cover (8), and is fitted with the step surface of the inner cavity of the valve cover (8), and the step surface limits the upper end surface of the spring, and the step surface of the inner cavity of the disc valve (7) and the lower end of the spring (9) are supported. The valve seat (5) and the piston (3) are screwed together and are connected to the circumferential ribs of the end face of the valve cover (8). The end face of the valve seat (5) and the end face of the disc valve (7) are in contact with each other and limit the lower end face of the disc valve (7). The two piston rings (4) and the grid ring (6) are embedded in the grooves of the piston side wall and are in contact with the inner wall of the cylinder body (1).

2. The piston valve assembly of a one-way flow structure shock absorber according to claim 1, characterized in that: The piston rod (2) has an outer wall thread (201) disposed on the outer wall of the end thereof, the other end thereof being an internal hollow structure and having an inner wall thread (202), an inner ring side wall surface (2004) disposed near the end thereof, a first step surface (2003) of the piston rod disposed between the inner wall thread (2002) and the inner ring side wall surface (2004), and an outer end surface (2005).

3. The piston valve assembly of a one-way flow structure shock absorber according to claim 1, characterized in that: The outer wall of the end of the piston (3) is provided with a piston outer wall thread (3001), and a second annular outer side surface (3002) is provided at the end; the main valve body of the piston (3) is an internal cavity structure, and a plurality of piston flow channels (3003) are provided to communicate with the internal cavity; the outer side surface of the main valve body of the piston (3) is provided with a first annular groove (3004), a second annular groove (3005), and a third annular groove (3006); and the lower end surface of the piston (3) is provided with a plurality of process blind holes (3007) for The piston (3) is installed, the inner cavity side wall of the piston (3) is provided with an inner cavity side wall thread (3008), the inner cavity side wall is provided with an inner cavity side wall inner ring surface (3010), the inner cavity side wall thread (3008) and the inner cavity side wall inner ring surface (3010) are provided with a first annular step surface (3009), the inner cavity side wall inner ring surface (3010) and the inner cavity are provided with a second annular step surface (3011), and the lower end surface of the piston (3) is a concave structure and is provided with an annular step rib position (3012).

4. The piston valve assembly of a one-way flow structure shock absorber according to claim 1, characterized in that: The valve cover (8) is provided with a plurality of valve cover circulation channels (8001) at the end, an annular rib (8003) is provided at the other end, a first annular side surface (8005) is provided on the inner wall surface of the annular rib (8003), an outer wall step surface (8002) is provided between the annular rib (8003) and the outer wall of the valve cover, a valve cover first step surface (8004) is provided between the hollow portion inside the valve cover and the annular rib (8003), a second annular side surface (8006) is provided on the side wall of the valve cover first step surface (8004), and a valve cover inner concave circular plane (8007) is provided on the bottom surface of the valve cover (8).

5. The piston valve assembly of a one-way flow structure shock absorber according to claim 1, characterized in that: The two ends of the spring (9) are respectively arranged as a spring upper end plane (9001) and a spring lower end plane (9002).

6. The piston valve assembly of a one-way flow structure shock absorber according to claim 1, characterized in that: The two ends of the disc valve (7) are respectively arranged as a disc valve upper end plane (7001) and a disc valve lower end plane (7004); a disc valve inner concave circular plane (7002) is arranged at the center of the disc valve; and the side wall of the disc valve is a cylindrical side wall surface (7003).

7. The piston valve assembly of a one-way flow structure shock absorber according to claim 1, characterized in that: The valve seat (5) is provided with an annular inner groove (5002), the first annular end face (5001) and the second annular end face (5003) are planes of equal height, the third annular end face (5004) is provided to be higher than the second annular end face (5003), the outer wall of the valve seat (5) is provided with a valve seat outer wall thread (5005), and the back end face of the valve seat is provided with an inner hexagonal groove (5006).

8. The piston valve assembly of a one-way flow structure shock absorber according to claim 3, characterized in that: A sealing piston ring (4) is provided at the first annular groove (3004) and the third annular groove (3006) on the outer side wall of the piston (3), and a sealing Gly ring (6) is provided at the second annular groove (3005).

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