A shock absorber piston valve

Abstract

The present invention discloses a shock absorber piston valve, which relates to the technical field of automobile shock absorber, comprising a piston column, a piston split and a piston body arranged on the outer wall of the piston column; a groove is provided on the surface of the piston split; the present invention creates and designs a split piston on the other side of a traditional piston, and the end face of the split piston can adjust the compression damping performance by superimposing a valve plate, and the piston is designed as a combined press-fit structure (the piston split and the piston body are press-fitted together). The design of this press-fit structure can also realize modular combination of pistons, and according to the requirements of shock absorber performance matching, piston splits of different specifications can be freely combined with the piston body. Due to the modular combination design, it can also bring greater debugging and matching space to the performance of the shock absorber, so that it can cover the debugging requirements of more models with different performance orientations; it can realize piston modularization, generalization and standardization, and greatly reduce procurement and management costs.

Description

Technical Field

[0001] The invention relates to the technical field of automobile shock absorbers, in particular to a shock absorber piston valve. Background Art

[0002] Shock absorbers are used to suppress the shock when the spring rebounds after absorbing the shock and the impact from the road. They are widely used in automobiles to accelerate the attenuation of the vibration of the frame and body to improve the driving smoothness of the car. When passing through uneven roads, although the shock-absorbing spring can filter the vibration of the road, the spring itself will still have reciprocating motion, and the shock absorber is used to suppress this spring jump. In the suspension system, the elastic element is subjected to impact and vibration. In order to improve the driving smoothness of the car, the shock absorber is installed in parallel with the elastic element in the suspension. In order to attenuate the vibration, the shock absorber used in the automobile suspension system is mostly hydraulic. The working principle of the shock absorber is that when the frame (or body) and the axle vibrate and move relative to each other, the piston in the shock absorber moves up and down, and the oil in the shock absorber cavity repeatedly flows from one cavity to another through different pores. At this time, the friction between the pore wall and the oil and the internal friction between the oil molecules form a damping force on the vibration, so that the vibration energy of the car is converted into oil heat energy, which is then absorbed by the shock absorber and dissipated into the atmosphere. When the cross-section of the oil channel and other factors remain unchanged, the damping force increases or decreases with the relative movement speed between the frame and the axle (or wheel), and is related to the viscosity of the oil.

[0003] In the existing technology, the traditional shock absorber piston valve is just a single one-way valve. 95% of the function of this piston valve structure is to control the tensile performance, and only about 5% of the function is to control and adjust the compression performance. The compression performance adjustment range is very limited, and it cannot achieve better debugging and matching of the compression performance, affecting the comfort and handling performance of the whole vehicle, etc., and cannot meet the performance requirements of today's customers to a greater extent; when meeting different damping force requirements, the piston valve of the traditional shock absorber needs to open a variety of specifications of piston and bottom valve body molds, which leads to a sharp increase in production costs and does not utilize management.

[0004] To this end, we propose a shock absorber piston valve. Summary of the Invention

[0005] The purpose of the present invention is to provide a shock absorber piston valve to solve the problem raised in the above background technology that in the existing technology, the traditional shock absorber piston valve is only a single one-way valve. 95% of the function of this piston valve structure is to control the tensile performance, and only about 5% of the function is to control and adjust the compression performance. The compression performance adjustment range is very limited, and it is impossible to achieve better debugging and matching of the compression performance, which affects the comfort and handling performance of the whole vehicle, and cannot meet the performance requirements of today's customers to a greater extent; when the traditional shock absorber piston valve meets different damping force requirements, it is necessary to open a variety of specifications of pistons and bottom valve body molds, which leads to a sharp increase in production costs and does not utilize management problems.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A shock absorber piston valve, comprising:

[0008] A piston column, and a piston split and a piston body arranged on the outer wall of the piston column; a groove 1 is opened on the surface of the piston split body, and an annular boss body and a plurality of protective boss bodies are provided at the bottom of the groove 1, the inner wall of the annular boss body contacts the outer wall of the piston column, and the plurality of protective boss bodies are distributed in an annular shape on the periphery of the piston column within the groove 1;

[0009] A plurality of compression oil circulation holes are provided in the groove, and the plurality of compression oil circulation holes are distributed in an annular shape inside the groove, and the plurality of compression oil circulation holes are located on the outside of the protective boss body; an annular valve line boss is provided on the surface of the piston split body, and a tension oil circulation hole is provided on the outer wall of the bottom of the piston split body; a step difference preload valve disc, a throttle valve disc, a valve system assembly, a valve opening gasket, a limit protection valve disc, and a support pad are sequentially provided on the surface of the annular boss body;

[0010] The bottom of the piston body is provided with a second groove, the bottom of the second groove is provided with a slender U-shaped pressure groove, the bottom of the second groove is provided with a second stretching oil circulation hole, wherein the second stretching oil circulation hole is arranged on the outside of the second groove; the bottom of the second groove is provided with a second annular valve line boss and a second compression oil circulation hole, and the second annular valve line boss and the second compression oil circulation hole are both located on the outside of the second stretching oil circulation hole;

[0011] The bottom of the piston body is provided with a flow limiting protection valve disc, a second step differential preload valve disc, a second throttle valve disc, a second valve system assembly, a second valve opening gasket, a second limit protection valve disc, and a pressure pad in sequence. The diameter of the flow limiting protection valve disc is greater than or equal to the diameter of the second step differential preload valve disc. The sum of the thicknesses of the flow limiting protection valve disc and the second step differential preload valve disc should be less than the height difference from the bottom plane of the second groove to the first annular valve line boss.

[0012] When the piston rod performs a stretching movement, the valve system assembly 1 on the end face of the piston split body closes the compression oil flow hole 1, and the oil flows from the stretching oil flow hole 1 on the side of the piston split body, passes through the stretching oil flow hole 2 of the piston body, and pushes the valve system assembly 2 on the end face of the piston body, thereby generating stretching damping;

[0013] When the piston column performs compression movement, the valve system combination 2 on the end face side of the piston body closes the stretching oil flow hole 2, and the oil flows in from the compression oil flow hole 2 on the outer ring of the piston body, passes through the compression oil flow hole 1 of the piston split, and pushes the valve system combination 1 on the end face of the piston split, generating compression damping.

[0014] Through the above technical scheme, the following technical effects can be achieved: in order to ensure durability and other related performance, a protective boss body, a limit protection valve plate 1, and a limit protection valve plate 2 are set in the groove 1 on the end face of the piston split; the modular piston split can also remove the protective boss body and the annular boss body of the piston split on its end face and replace them with a flow limiting protection valve plate. The flow limiting protection valve plate can adjust the outer diameter to achieve the adjustment of the flow size of the compressed oil flow hole 1.

[0015] As a further solution of the present invention, the piston split and the piston body are fixed to the outer wall of the piston column by fixing bolts.

[0016] Through the above technical solution, the following technical effects can be achieved: since the piston split and the piston body are connected to the outer wall of the piston column by fixing bolts, it is relatively simple and convenient to disassemble the piston split and the piston body in the later stage. Specifically, the piston split and the piston body can be disassembled by first removing the fixing bolts.

[0017] As a further solution of the present invention, a U-shaped auxiliary pressure groove is provided on the end surface of the support pad and the pressure pad that is opposite to each other.

[0018] As a further solution of the present invention, the compression oil flow hole 1 of the piston split is communicated with the compression oil flow hole 2 of the piston body; the stretching oil flow hole 1 of the piston split is communicated with the stretching oil flow hole 2 of the piston body.

[0019] As a further solution of the present invention, the outer diameter of the step-difference preload valve plate used in the split piston is the same as the diameter of the annular boss body of the split piston.

[0020] Through the above technical solution, the following technical effects can be achieved: by creating and designing a split piston on the other side of the traditional piston, the end face of the split piston can adjust the compression damping performance through the superimposed valve plate, and the piston is designed as a combined press-fit structure (the piston split and the piston body are press-fitted together). The design of this press-fit structure can also realize the modular combination of the piston. According to the requirements of the shock absorber performance matching, the piston splits and the piston body of different specifications can be freely combined. Due to the modular combination design, it can also bring greater debugging and matching space to the performance of the shock absorber, so that it can cover the debugging requirements of more models with different performance orientations; the piston can be modularized, universalized and standardized, greatly reducing procurement and management costs.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The present invention creates and designs a split piston on the other side of the traditional piston. The end face of the split piston can adjust the compression damping performance by superimposing a valve plate. The piston is designed as a combined press-fit structure (the piston split and the piston body are press-fitted together). The design of this press-fit structure can also realize modular combination of pistons. According to the requirements of shock absorber performance matching, piston splits and piston bodies of different specifications can be freely combined. Due to the modular combination design, it can also bring greater debugging and matching space to the performance of the shock absorber, so that it can cover the debugging requirements of more models with different performance orientations; it can realize piston modularization, generalization and standardization, greatly reducing procurement and management costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the piston valve structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the end surface structure of the piston body of the present invention;

[0025] Figure 3 This is a schematic diagram of the split end surface structure of the piston of the present invention;

[0026] Figure 4 This is a comparison chart of the performance curves of the present invention and the traditional piston valve.

[0027] In the figure: 1. Piston column; 2. Support pad; 3. Limit protection valve disc 1; 4. Valve opening gasket 1; 5. Valve system assembly 1; 6. Throttle valve disc 1; 7. Step differential preload valve disc 1; 8. Piston split; 9. Piston body; 10. Flow limiting protection valve disc; 11. Step differential preload valve disc 2; 12. Throttle valve disc 2; 13. Valve system assembly 2; 14. Valve opening gasket 2; 15. Limit protection valve disc 2; 16. Pressure pad; 17. Fixing bolt; 18. Stretching oil flow hole 2; 19. Slender U-shaped pressure groove; 20. Annular valve line boss 2; 21. Groove 2; 22. Compression oil flow hole 2; 23. Protection boss body; 24. Groove 1; 25. Annular boss body; 26. Annular valve line boss 1; 27. Compression oil flow hole 1; 28. Stretching oil flow hole 1; 29. ​​U-shaped auxiliary pressure groove. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] See also Figure 1-4 The present invention provides a technical solution: a shock absorber piston valve, a piston column 1, and a piston split 8 and a piston body 9 arranged on the outer wall of the piston column 1; the piston split 8 and the piston body 9 are fixed to the outer wall of the piston column 1 by fixing bolts 17;

[0030] Since the piston split 8 and the piston body 9 are connected to the outer wall of the piston column 1 by fixing bolts 17, it is relatively simple and convenient to disassemble the piston split 8 and the piston body 9 in the later stage. Specifically, the piston split 8 and the piston body 9 can be disassembled by first removing the fixing bolts 17.

[0031] A groove 24 is provided on the surface of the piston split body 8, and an annular boss body 25 and a plurality of protective boss bodies 23 are provided at the bottom of the groove 24. The inner wall of the annular boss body 25 contacts the outer wall of the piston column 1, and the plurality of protective boss bodies 23 are distributed in an annular shape on the periphery of the piston column 1 in the groove 24; a plurality of compressed oil flow holes 27 are provided in the groove 24, and the plurality of compressed oil flow holes 27 are distributed in an annular shape inside the groove 24, and the plurality of compressed oil flow holes 27 are located on the outside of the protective boss body 23; an annular valve line boss 26 is provided on the surface of the piston split body 8, and a stretching oil flow hole 28 is provided on the outer wall of the bottom of the piston split body 8; the surface of the annular boss body 25 is provided with a step difference preload valve plate 7, a throttle valve plate 6, a valve system combination 5, a valve opening gasket 4, a limit valve Position protection valve disc 13 and support pad 2; the end surface of the support pad 2 opposite to the pressure pad 16 is provided with a U-shaped auxiliary pressure groove 29, the bottom of the piston body 9 is provided with a groove 21, the bottom of the groove 21 is provided with a slender U-shaped pressure groove 19, the bottom of the groove 21 is provided with a stretching oil circulation hole 21, wherein the stretching oil circulation hole 218 is arranged on the outside of the groove 21; the bottom of the groove 21 is provided with an annular valve line boss 20 and a compression oil circulation hole 22, the annular valve line boss 20 and the compression oil circulation hole 22 are all located on the outside of the stretching oil circulation hole 21; the bottom of the piston body 9 is provided with a limited flow protection valve disc 10, a step difference preload valve disc 21, a throttle valve disc 212, a valve system assembly 213, a valve opening gasket 214, a limit protection valve disc 215, and a pressure pad 16 in sequence;

[0032] Specifically, in order to ensure durability and other related performance, a protective boss body 23, a position limiting protection valve plate 3, and a position limiting protection valve plate 2 15 are set in the groove 1 24 on the end face of the piston split 8; the modular piston split 8 can also remove the protective boss body 23 and the annular boss body 25 of the piston split 8 on its end face and replace them with a flow limiting protection valve plate 10. The flow limiting protection valve plate 10 can adjust the outer diameter to adjust the flow size of the compressed oil flow hole 1 27.

[0033] The compression oil flow hole 1 27 of the piston split 8 is connected to the compression oil flow hole 2 22 of the piston body 9; the extension oil flow hole 1 28 of the piston split 8 is connected to the extension oil flow hole 2 18 of the piston body 9. When the piston column 1 performs the extension movement, the valve system combination 1 5 on the end face side of the piston split 8 closes the compression oil flow hole 1 27, and the oil flows from the extension oil flow hole 1 28 on the side of the piston split 8, passes through the extension oil flow hole 2 18 of the piston body 9, and pushes the valve system combination 2 13 on the end face of the piston body 9 to generate extension damping; when the piston column 1 performs the compression movement, the valve system combination 1 5 on the end face side of the piston body 9 closes the compression oil flow hole 1 The system combination 13 closes the stretching oil flow hole 18, and the oil flows in from the compression oil flow hole 22 on the outer ring of the piston body 9, passes through the compression oil flow hole 1 27 of the piston split 8, and pushes the valve system combination 5 on the end face of the piston split 8 to generate compression damping. The diameter of the flow limiting protection valve plate 10 is greater than or equal to the diameter of the step differential preload valve plate 11. The sum of the thicknesses of the flow limiting protection valve plate 10 and the step differential preload valve plate 11 should be less than the height difference from the bottom plane of the groove 21 to the annular valve line boss 26. The outer diameter of the step differential preload valve plate 7 used by the piston split 8 is the same as the diameter of the annular boss body 25 of the piston split 8.

[0034] Specifically, when the piston column 1 performs a stretching movement, the valve system combination 15 on the end face side of the piston split 8 closes the compression oil flow hole 127, and the oil flows in from the stretching oil flow hole 128 on the side of the piston split 8, passes through the stretching oil flow hole 12 18 of the piston body 9, and pushes the valve system combination 13 on the end face of the piston body 9 to generate stretching damping; when the piston column 1 performs a compressing movement, the valve system combination 13 on the end face side of the piston body 9 closes the stretching oil flow hole 12 18, and the oil flows in from the compression oil flow hole 12 22 on the outer ring of the piston body 9, passes through the compression oil flow hole 127 of the piston split 8, and pushes the valve system combination 15 on the end face of the piston split 8 to generate compression damping. Compared with the existing The present invention creates and designs a split piston on the other side of the traditional piston. The end face of the split piston can adjust the compression damping performance by superimposing a valve plate. The piston is designed as a combined press-fit structure (the piston split 8 and the piston body 9 are press-fitted together). The design of this press-fit structure can also realize modular combination of pistons. According to the requirements of shock absorber performance matching, piston splits 8 and piston bodies 9 of different specifications can be freely combined. Due to the modular combination design, it can also bring greater debugging and matching space to the performance of the shock absorber, so that it can cover the debugging requirements of more models with different performance orientations; it can realize piston modularization, generalization and standardization, greatly reducing procurement and management costs.

[0035] Working Principle: In the present invention, when the piston rod 1 is in use, first, when the piston rod 1 is in tension, the valve system assembly 1 5 on the end face of the piston split body 8 closes the compression oil flow hole 1 27. The oil flows from the tension oil flow hole 1 28 on the side of the piston split body 8, passes through the tension oil flow hole 2 18 of the piston body 9, and pushes the valve system assembly 2 13 on the end face of the piston body 9, generating tension damping.

[0036] Secondly, when the piston column 1 performs a compression movement, the valve system assembly 2 13 on the end face side of the piston body 9 closes the stretching oil flow hole 2 18, and the oil flows from the compression oil flow hole 2 22 on the outer ring of the piston body 9, passes through the compression oil flow hole 1 27 of the piston split 8, and pushes the valve system assembly 1 5 on the end face of the piston split 8 to generate compression damping. The present invention creates and designs a split piston on the other side of the traditional piston. The compression damping performance of the split piston end face can be adjusted by stacking valve plates. The piston is designed as a combined press-fit structure (the piston split 8 and the piston body 9 are press-fitted together). The design of this press-fit structure can also realize modular combination of pistons. According to the requirements of shock absorber performance matching, piston splits 8 and piston bodies 9 of different specifications can be freely combined. Due to the modular combination design, it can also bring greater debugging and matching space to the performance of the shock absorber, so that it can cover the debugging requirements of more models with different performance orientations; it can realize piston modularization, generalization and standardization, greatly reducing procurement and management costs;

[0037] Finally, in order to ensure durability and other related performance, a protective boss body 23, a position limiting protection valve plate 3, and a position limiting protection valve plate 2 15 are set in the groove 1 24 on the end face of the piston split 8; the modular piston split 8 can also remove the protective boss body 23 and the annular boss body 25 of the piston split 8 on its end face and replace them with a flow limiting protection valve plate 10. The flow limiting protection valve plate 10 can adjust the outer diameter to adjust the flow rate of the compressed oil flow hole 1 27.

[0038] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A shock absorber piston valve, characterized in that: include: A piston column (1), and a piston split (8) and a piston body (9) arranged on the outer wall of the piston column (1); a groove (24) is provided on the surface of the piston split (8), an annular boss body (25) and a plurality of protective boss bodies (23) are provided at the bottom of the inner bottom of the groove (24), the inner wall of the annular boss body (25) contacts the outer wall of the piston column (1), and the plurality of protective boss bodies (23) are distributed in an annular shape on the periphery of the piston column (1) in the groove (24); a plurality of compressed oil circulation holes (27) are provided in the groove (24), the plurality of compressed oil circulation holes (27) are distributed in an annular shape inside the groove (24), and the plurality of compressed oil circulation holes (27) are located on the outer side of the protective boss body (23); The surface of the piston body (8) is provided with an annular valve line boss (26), and the outer wall of the bottom of the piston body (8) is provided with a stretching oil flow hole (28); the surface of the annular boss body (25) is provided with a step difference preload valve plate (7), a throttle valve plate (6), a valve system assembly (5), a valve opening gasket (4), a limit protection valve plate (3), and a support pad (2); the bottom of the piston body (9) is provided with a groove (21), and the groove (22) is provided with a groove (23). 1) An elongated U-shaped pressing groove (19) is provided at the inner bottom, and a second stretching oil circulation hole (18) is provided at the inner bottom of the second groove (21), wherein the second stretching oil circulation hole (18) is arranged on the outer side of the second groove (21); an annular valve line boss (20) and a second compression oil circulation hole (22) are provided at the inner bottom of the second groove (21), and the annular valve line boss (20) and the second compression oil circulation hole (22) are both located on the outer side of the second stretching oil circulation hole (18); The bottom of the piston body (9) is provided with a flow limiting protection valve disc (10), a step differential pre-pressure valve disc 2 (11), a throttle valve disc 2 (12), a valve system assembly 2 (13), a valve opening gasket 2 (14), a position limiting protection valve disc 2 (15), and a pressure pad (16) in sequence, wherein the diameter of the flow limiting protection valve disc (10) is greater than or equal to the diameter of the step differential pre-pressure valve disc 2 (11), and the sum of the thicknesses of the flow limiting protection valve disc (10) and the step differential pre-pressure valve disc 2 (11) should be less than the height difference from the bottom plane of the groove 2 (21) to the annular valve line boss 1 (26); When the piston column (1) performs a stretching movement, the valve system assembly (5) on the end face side of the piston split body (8) closes the compression oil flow hole (27), and the oil flows from the stretching oil flow hole (28) on the side of the piston split body (8), passes through the stretching oil flow hole (18) of the piston body (9), and pushes the valve system assembly (13) on the end face of the piston body (9), thereby generating stretching damping; When the piston column (1) performs compression movement, the valve system assembly 2 (13) on the end face side of the piston body (9) closes the stretching oil flow hole 2 (18), and the oil flows from the compression oil flow hole 2 (22) on the outer ring of the piston body (9), passes through the compression oil flow hole 1 (27) of the piston split body (8), and pushes the valve system assembly 1 (5) on the end face of the piston split body (8), thereby generating compression damping.

2. A shock absorber piston valve according to claim 1, characterized in that: The piston split (8) and the piston body (9) are fixed to the outer wall of the piston column (1) via fixing bolts (17).

3. The shock absorber piston valve according to claim 1, characterized in that: The end faces of the support pad (2) and the pressure pad (16) facing each other are each provided with a U-shaped auxiliary pressure groove (29).

4. The shock absorber piston valve according to claim 1, characterized in that: The compression oil flow hole 1 (27) of the piston split (8) is communicated with the compression oil flow hole 2 (22) of the piston body (9); the stretching oil flow hole 1 (28) of the piston split (8) is communicated with the stretching oil flow hole 2 (18) of the piston body (9).

5. The shock absorber piston valve according to claim 1, characterized in that: The outer diameter of the step difference pre-compression valve plate 1 (7) used by the piston split (8) is the same as the diameter of the annular boss body (25) of the piston split (8).

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