A hydraulic shock absorber valve

Abstract

The present invention discloses a hydraulic shock absorber valve, which includes a housing, a shock absorbing cavity formed within the housing, and a shock absorbing piston, an auxiliary block and an elastic member compatible with the shock absorbing piston, disposed within the shock absorbing cavity. By connecting the hydraulic shock absorber valve to a hydraulic energy supply structure and communicating the two, sudden changes in pressure or pressure peaks, especially the hydraulic pressure generated instantaneously by the two, are transmitted to the hydraulic shock absorber valve. The hydraulic shock absorber valve is utilized to balance sudden pressure changes within the hydraulic energy supply structure, reducing the pressure after the sudden change or peak from being directly transmitted to the target structure. This allows for a stable output of the hydraulic pressure in the hydraulic energy supply structure, avoiding the impact of sudden pressure changes (especially increases) and excessive pressure peaks generated in the hydraulic energy supply structure on the stability of the product's control hydraulic pressure, thereby avoiding the impact of unstable product output pressure.

Description

Technical Field

[0001] The present invention relates to the technical field of shock absorbing valves, and in particular to a hydraulic shock absorbing valve. Background Art

[0002] Hydraulic power supply is a common feature in existing power equipment and devices, such as hydraulic cylinders and oil circuits. However, these hydraulic power supply structures can be affected by unstable factors in the operating environment or during use (such as vibration, uneven force distribution within the load-bearing structure, unbalanced force transmission within the load-bearing structure, and poor lubrication), leading to unstable hydraulic oil pressure within the hydraulic power supply structure, thereby reducing the stability of the hydraulic structure's operation. Summary of the Invention

[0003] In order to solve the above technical problems, the present invention provides a hydraulic shock absorber valve, which includes a shell, a shock absorber cavity is formed in the shell, a shock absorber piston is arranged in the shock absorber cavity, and the shock absorber piston or a seal arranged on the shock absorber piston is slidably sealed with the inner wall of the shock absorber cavity; the shock absorber cavity is separated by the shock absorber piston or the seal into a shock absorber drive cavity and a shock absorber control cavity connected to the hydraulic power supply structure; an auxiliary block is connected to the shock absorber control cavity or the free end of the shock absorber control cavity; an elastic member is arranged between the shock absorber piston and the auxiliary block, which is compressed under the push of the shock absorber piston and resets when there is no hydraulic action. By connecting a hydraulic shock absorber valve to the hydraulic energy supply structure and communicating between the two, sudden pressure changes or pressure peaks, especially the instantaneous hydraulic pressure generated by the two, are transmitted to the hydraulic shock absorber valve. The hydraulic shock absorber valve is used to balance sudden pressure changes within the hydraulic energy supply structure, reducing the pressure after the sudden pressure change or the pressure peak from being directly transmitted to the target structure (e.g., the clutch), thereby ensuring a smooth output of the hydraulic pressure within the hydraulic energy supply structure. This prevents the impact of sudden pressure changes (especially increases) and excessive pressure peaks generated within the hydraulic energy supply structure on the stability of the product's control hydraulic pressure, thereby preventing the impact of unstable product output pressure. Furthermore, a shock absorber piston and a cooperating elastic member are provided within the hydraulic shock absorber valve. The sudden pressure change or the pressure peak of the hydraulic oil is transmitted to the shock absorber piston, thereby compressing the elastic member. The compression of the elastic member buffers the sudden pressure change of the hydraulic medium, ensuring a smooth output of the hydraulic pressure within the hydraulic energy supply structure.

[0004] In one embodiment, the elastic member is at least one damping spring, and both ends of the damping spring abut against the damping piston and the auxiliary block, respectively. By adopting a common spring design, the design cost is reduced and the spring coefficient can be selected.

[0005] In one embodiment, the elastic member is a shock-absorbing group consisting of at least one set of shock-absorbing plates. By replacing the shock-absorbing spring with a shock-absorbing group consisting of shock-absorbing plates, problems such as hydraulic instability and excessive hydraulic volume consumption caused by the shock-absorbing spring's excessive travel can be avoided, thereby facilitating end-volume control of the hydraulic medium and improving system travel efficiency. For example, a shock-absorbing group consisting of multiple sets of shock-absorbing plates can be stacked for use, whereas multiple sets of springs require additional connectors or connection structures, which are complex and affect performance stability.

[0006] In one embodiment, the elastic member comprises at least one shock-absorbing spring and at least one shock-absorbing group comprising shock-absorbing sheets. By combining the shock-absorbing spring and the shock-absorbing group, the advantages of both can be combined, the number of connecting parts can be reduced, and the system performance stability can be improved.

[0007] In one embodiment, the elastic member includes a shock-absorbing spring and a first shock-absorbing group and a second shock-absorbing group consisting of a shock-absorbing plate. The shock-absorbing plate is an annular structure with at least a bent portion, and the end of the shock-absorbing piston near the auxiliary block forms a first columnar protrusion or a first groove, and the end of the auxiliary block near the shock-absorbing piston forms a second columnar protrusion or a second groove; the first shock-absorbing group is sleeved on the first columnar protrusion or placed in the first groove, one end of the shock-absorbing spring is sleeved on the second columnar protrusion or placed in the second groove, and the shock-absorbing spring abuts against the bent portion of the first shock-absorbing group; the second shock-absorbing group is sleeved on the end of the auxiliary block near the shock-absorbing piston, and the end of the shock-absorbing piston near the auxiliary block forms a driving end that compresses the second shock-absorbing group under the action of oil pressure.

[0008] Furthermore, the elastic coefficient of the shock-absorbing spring is greater than the elastic coefficient of the second shock-absorbing group, and the elastic coefficient of the second shock-absorbing group is greater than the elastic coefficient of the first shock-absorbing group.

[0009] By setting a shock-absorbing spring and two shock-absorbing groups consisting of shock-absorbing plates, and then setting the elastic coefficients between the three, when in use, when the hydraulic pressure reaches the design parameters, the space between the compression plates of the first compression group and the second compression group is compressed first, and the shock-absorbing spring does not move; then, the first compression group basically does not deform anymore, and as the hydraulic pressure continues to increase, the compression plates of the second compression group continue to be compressed, and the shock-absorbing spring does not move or is slightly compressed; finally, as the oil pressure continues to increase, the second compression group basically does not deform anymore, and continues to compress the shock-absorbing spring. The above-mentioned use process refers to the hydraulic pressure reaching the level that can compress the compression spring. Of course, in actual use, the hydraulic pressure may not always reach the above-mentioned level. The change process of the above-mentioned elastic member is related to the hydraulic pressure and can be part of the above-mentioned process; at the same time, the specific compression change process of the elastic member is related to the selected elastic coefficient. For example, in part of the above-mentioned process, the two elastic members may be compressed together. Of course, the elastic member with a small elastic coefficient is quickly compressed to the limit. Through the above-mentioned specific setting of the elastic parts, the short-range compression space of the shock-absorbing group composed of elastic sheets can be effectively utilized, which improves the stability of the hydraulic pressure when the hydraulic pressure suddenly changes, and at the same time prevents the hydraulic volume consumption from being too large, improves the volume control of the liquid supply end, and ensures the system stroke efficiency; at the same time, the application of double shock-absorbing groups can provide a variety of application combinations to adapt to a variety of scenarios; finally, by setting the shock-absorbing spring with the largest elastic coefficient, it plays the role of the last backup. For example, when the pressure increases extremely, it avoids the shock-absorbing group from being unable to play a shock-absorbing role due to the short stroke. Through the combination of a large elastic coefficient and a stroke greater than the shock-absorbing group, the hydraulic pressure is guaranteed to be stable as much as possible, and the system stroke and work efficiency are guaranteed. The above-mentioned setting can realize a step-by-step filtering shock-absorbing mode, that is, by setting different elastic coefficients, a step-by-step shock-absorbing mode from small to large under different pressure changes can be realized.

[0010] In one embodiment, a sealing ring is provided between the auxiliary block and the damping control chamber. A breathing channel is formed within the auxiliary block, extending through the auxiliary block, and a filter element is provided at the end of the breathing channel that is closest to the atmosphere. The provision of the breathing channel and filter element improves the sensitivity of the damping valve and prevents dust from entering the damping control chamber.

[0011] In one embodiment, the end of the breathing channel near the filter element structure is expanded outward to form an annular groove. This annular groove traps any moisture introduced during inhalation, reducing its ability to enter the shock absorber valve. During exhalation, the moisture trapped in the annular groove is backflushed out. Furthermore, dust particles adsorbed on the filter element surface during inhalation are backflushed out during exhalation.

[0012] In one embodiment, the housing is integrally formed with the outer shell of the hydraulic power supply structure. This integrated design can reduce oil circuit connections, minimize leakage, and minimize shock absorption failure. Of course, it can also reduce the overall design volume. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the specific embodiments of the present invention, the following is a brief introduction to the drawings required for use in the specific embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0014] Figure 1 Is a schematic structural diagram of the hydraulic shock absorber valve of the present invention;

[0015] Figure 2 It is a structural schematic diagram of a shock-absorbing sheet of the present invention;

[0016] Figure 3 It is an arrangement diagram of a shock absorbing group of the present invention;

[0017] Figure 4 This is a schematic structural diagram of an application of the hydraulic shock-absorbing valve of the present invention;

[0018] The reference numerals in the figure are as follows: 1-housing; 2-shock-absorbing piston; 3-seal; 4-shock-absorbing drive chamber; 5-shock-absorbing control chamber; 6-auxiliary block; 7-shock-absorbing spring; 8-first shock-absorbing group; 9-second shock-absorbing group; 10-shock-absorbing plate; 11-bending portion; 12-first columnar protrusion; 13-second groove; 14-driving end; 15-sealing ring; 16-breathing channel; 17-filter element structure; 18-annular groove; 19-liquid channel. DETAILED DESCRIPTION

[0019] The following is a clear and complete description of the present invention in conjunction with the accompanying drawings. It is obvious that the embodiments described are only some of the embodiments of the present invention, not all of them. The embodiments of the present invention and other embodiments obtained by ordinary technicians in this field without making creative efforts are all within the scope of protection of the present invention.

[0020] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0021] In the description of this invention, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be interpreted broadly. For example, they may refer to fixed, removable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this invention.

[0022] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other. Example 1

[0023] This embodiment discloses a hydraulic shock absorbing valve, which can be connected to a hydraulic energy supply structure to balance the buffering adjustment in the hydraulic energy supply structure when the hydraulic pressure suddenly changes, especially when it increases. Figure 1 , which includes a shell 1, which can be set separately or integrated with the outer shell of the hydraulic energy supply structure, a shock-absorbing cavity is formed in the shell 1, and a shock-absorbing piston 2 is provided in the shock-absorbing cavity, and the shock-absorbing piston 2 or the seal 3 provided on the shock-absorbing piston 2 is slidably sealed with the inner wall of the shock-absorbing cavity. In this embodiment, the seal 3 preferably provided on the shock-absorbing piston 2 is slidably sealed with the inner wall of the shock-absorbing cavity, and the seal 3 is preferably a sealing ring or a piston ring, such as a lip sealing ring; the shock-absorbing cavity is separated by the shock-absorbing piston or the seal into a shock-absorbing drive cavity 4 connected to the hydraulic energy supply structure and a shock-absorbing control cavity 5 not connected to the hydraulic energy supply structure. In this embodiment, the hydraulic energy supply structure is preferably a clutch booster, and the shell 1 is integrally formed with the hydraulic cylinder and is connected through a liquid channel 19, such as Figure 4 As shown; an auxiliary block 6 is connected to the inside of the damping control chamber 5 or the free end of the damping control chamber 5. Preferably, the free end of the damping control chamber 5 is connected to the auxiliary block 6. As for the connection method between the two, it is preferably connected by a threaded structure in this embodiment, that is, the auxiliary block 6 is provided with an external thread and the damping control chamber 5 is provided with an internal thread. When in use, the auxiliary block 6 is screwed into the damping control chamber 5; an elastic member is provided between the damping piston 2 and the auxiliary block 6, which is compressed by the damping piston 2 and resets when the damping piston 2 loses its hydraulic pressure. The configuration of the elastic member is various.

[0024] In one embodiment, the elastic member is at least one shock-absorbing spring, and two ends of one shock-absorbing spring or a combination of multiple shock-absorbing springs are respectively in contact with the shock-absorbing piston 2 and the auxiliary block 6 .

[0025] In one embodiment, the elastic member is at least one shock-absorbing group composed of shock-absorbing plates. The positional relationship among the shock-absorbing group, the shock-absorbing piston 2 and the auxiliary block 6 needs to be determined according to the number of groups and the specific structure.

[0026] In one embodiment, the elastic member is composed of a shock-absorbing spring and a shock-absorbing group composed of a shock-absorbing sheet. The number of the shock-absorbing springs and the number of the shock-absorbing groups are various and determined according to the specific design and structure. In this embodiment, the elastic member includes a shock-absorbing spring 7 and a first shock-absorbing group 8 and a second shock-absorbing group 9 composed of a shock-absorbing sheet 10. Specifically, the shock-absorbing sheet 10 is an annular structure having at least a bent portion 11. Of course, the structure of the bent portion 11 is various. Preferably, the bent portion 11 is an annular bend, such as Figure 1 As shown; the shock absorbing sheet 10 may include other parts in addition to the bending portion 11, an example of which is as follows Figure 2 As shown; the end of the shock-absorbing piston 2 close to the auxiliary block 6 forms a first cylindrical protrusion or a first groove, and the end of the auxiliary block 6 close to the shock-absorbing piston 2 forms a second cylindrical protrusion or a second groove; the first shock-absorbing group 8 is sleeved on the first cylindrical protrusion or placed in the first groove, and one end of the shock-absorbing spring 7 is sleeved on the second cylindrical protrusion or placed in the second groove, and the shock-absorbing spring 7 abuts against the bent portion of the first shock-absorbing group 8. In this embodiment, as shown Figure 1 As shown, the end of the shock-absorbing piston 2 near the auxiliary block 6 forms a first columnar protrusion 12, and the end of the auxiliary block 6 near the shock-absorbing piston 2 forms a second groove 13; the first shock-absorbing group 8 is sleeved on the first columnar protrusion 12, and one end of the shock-absorbing spring 7 is placed in the second groove 13. The second shock-absorbing group 9 is sleeved on the end of the auxiliary block 6 near the shock-absorbing piston 2, and a structure that supports one end of the second shock-absorbing group 9 is formed on the auxiliary block 6, such as a stepped structure, and the end of the shock-absorbing piston 2 near the auxiliary block 6 forms a driving end 14 that compresses the second shock-absorbing group 9 under the action of hydraulic pressure. The structure of the driving end 14 is various, preferably, an annular structure, such as Figure 1 As for the combination of the first shock absorbing group 8 and the second shock absorbing group 9, there are many different forms, such as Figure 1 As shown, two adjacent shock-absorbing sheets are back-to-back or reversely combined. Figure 3 The combination of the first shock absorbing group 8 is such that one part is combined in the same direction, the other part is also combined in the same direction, and the two parts are combined in back-to-back or reverse directions.

[0027] In one embodiment, the elastic coefficient of the shock absorbing spring 7 is greater than the elastic coefficient of the second shock absorbing group 9 , and the elastic coefficient of the second shock absorbing group 9 is greater than the elastic coefficient of the first shock absorbing group 8 .

[0028] In one embodiment, a sealing ring 15 is provided between the auxiliary block 6 and the shock absorption control chamber 5; a breathing channel 16 is formed in the auxiliary block 6 and passes through the auxiliary block 6, and a filter element structure 17 is provided at the end of the breathing channel 16 close to the atmosphere.

[0029] In one embodiment, the end of the breathing channel 16 close to the filter element structure 17 is expanded to form an annular groove 18. The structure of the annular groove 18 is various, such as Figure 1 As shown, the cross-section of the annular groove 18 is formed of two upper and lower triangles. In this case, the sidewall of the end of the breathing passage 16 at this location forms a frustum. When the annular groove 18 has the above structure, it can minimize the entry of moisture in the air into the shock absorber valve and maximize the removal of moisture accumulated in the annular groove 18 during exhalation.

[0030] The usage process of the present invention is as follows: taking the combination of the hydraulic shock absorber valve and the clutch booster as an example, when the pressure in the hydraulic cylinder increases too quickly due to a sudden change or the peak section, the hydraulic oil pushes the shock absorber piston to slide toward the position of the auxiliary block, and then compresses the shock absorber group and the shock absorber spring during the sliding process; when the pressure in the hydraulic cylinder decreases, the shock absorber piston slides in the opposite direction, and the shock absorber group and the shock absorber spring are gradually reset to the maximum extent.

[0031] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A hydraulic shock absorber valve, characterized in that: The utility model comprises a shell, wherein a shock-absorbing cavity is formed in the shell, a shock-absorbing piston is arranged in the shock-absorbing cavity, and the shock-absorbing piston or a seal provided on the shock-absorbing piston is slidingly sealed with the inner wall of the shock-absorbing cavity; the shock-absorbing cavity is divided by the shock-absorbing piston or the seal into a shock-absorbing driving cavity and a shock-absorbing control cavity which are connected to the hydraulic energy supply structure; an auxiliary block is connected to the shock-absorbing control cavity or the free end of the shock-absorbing control cavity; an elastic member is provided between the shock-absorbing piston and the auxiliary block, which is compressed by the shock-absorbing piston and resets when there is no hydraulic pressure; The elastic member includes a shock-absorbing spring and a first shock-absorbing group and a second shock-absorbing group composed of shock-absorbing plates; The shock-absorbing plate is an annular structure with at least a bent portion, the end of the shock-absorbing piston close to the auxiliary block forms a first columnar protrusion or a first groove, and the end of the auxiliary block close to the shock-absorbing piston forms a second columnar protrusion or a second groove; the first shock-absorbing group is sleeved on the first columnar protrusion or placed in the first groove, one end of the shock-absorbing spring is sleeved on the second columnar protrusion or placed in the second groove, and the shock-absorbing spring abuts against the bent portion of the first shock-absorbing group; the second shock-absorbing group is sleeved on the end of the auxiliary block close to the shock-absorbing piston, and the end of the shock-absorbing piston close to the auxiliary block forms a driving end for compressing the second shock-absorbing group under the action of oil pressure; The elastic coefficient of the shock absorbing spring is greater than the elastic coefficient of the second shock absorbing group, and the elastic coefficient of the second shock absorbing group is greater than the elastic coefficient of the first shock absorbing group.

2. The hydraulic shock absorber valve according to claim 1, characterized in that: A sealing ring is provided between the auxiliary block and the shock absorption control chamber; a breathing channel is formed in the auxiliary block and passes through the auxiliary block, and a filter element structure is provided at the end of the breathing channel close to the atmosphere.

3. The hydraulic shock absorber valve according to claim 2, characterized in that: The end of the breathing channel close to the filter element structure expands outward to form an annular groove.

4. The hydraulic shock absorber valve according to any one of claims 1 to 3, characterized in that: The housing is integrally formed with the outer shell of the hydraulic energy supply structure.

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