Shock absorber valve

Abstract

The damper valve comprises a valve sleeve, a driving mechanism, a pilot valve element, a composite elastic piece and an adjusting valve seat, the driving mechanism, the pilot valve element, the composite elastic piece and the adjusting valve seat are sequentially arranged in the axial direction, and the pilot valve element, the composite elastic piece and the adjusting valve seat are arranged in the valve sleeve; the adjusting valve seat is axially and fixedly connected with the valve sleeve; an oil inlet valve port is formed in the center of the adjusting valve seat; the composite elastic piece comprises an inner ring, an outer ring and an outer supporting arm, the outer ring is fixedly connected with the adjusting valve seat, and an inner hole is formed in the center of the inner ring and communicated with the oil inlet valve port. The outer supporting arm is located between the inner ring and the outer ring, one end of the outer supporting arm and the inner ring are located on the same plane, the other end of the outer supporting arm extends in the axial direction to be attached to the pilot valve element, and the outer supporting arm is used for providing axial acting force for the pilot valve element. A second valve port is formed between the inner ring and the pilot valve element, a second valve port is formed between the inner ring and the adjusting valve seat, and the driving mechanism is used for driving the pilot valve element to move in the axial direction so as to adjust the sizes of the first valve port and the second valve port. The damper valve has the dual functions of the release valve characteristic and the pressure adjusting characteristic at the same time.

Description

Technical Field

[0001] The present application relates to the technical field of shock absorber valves, and particularly relates to a shock absorber valve. Background Art

[0002] In the shock absorber valve of the prior art, it includes a main valve structure and a pilot valve structure. There is a valve port between the main valve structure and the pilot valve structure, and the flow rate of the valve port determines the damping characteristics of the shock absorber valve; in the shock absorber valve, a spring device is arranged between the pilot valve structure and the main valve structure to adjust the distance between the pilot valve structure and the valve port, thereby adjusting the flow rate passing through the valve port to achieve the adjustment of the damping characteristics of the shock absorber valve.

[0003] In the existing shock absorber valve, a helical spring is arranged in the pilot valve structure, and a helical spring and a shim spring are arranged in the main valve structure, which cooperate to control the movement of the pilot valve structure to regulate the flow rate of the valve port; however, such a structural arrangement makes the stroke section of the pilot valve structure include S1 or S2. S1 is when the valve port is fully open, and S2 is when the valve port is fully closed. When S is between S1 and S2, the flow rate passing through the valve port can be adjusted. However, if S = S2, a large flow pressure is required to open the valve port, which will cause the shock absorber valve to be unable to open the valve port at low-pressure flow and can only perform a steep ejection pressure adjustment at high pressure, thus unable to meet the requirements of occasions where low-pressure opening is needed.

[0004] Therefore, there is room for further improvement in the shock absorber valve in the prior art. Utility Model Content

[0005] In view of this, aiming at the technical problem that the shock absorber valve in the above-mentioned prior art cannot simultaneously have the characteristics of a relief valve and a pressure regulating valve, the present application provides a shock absorber valve, which simultaneously has the characteristics of a relief valve and a pressure regulating valve, can meet different damping adjustment requirements for the shock absorber valve, enables the shock absorber valve to start at low pressure and can also perform a steep ejection pressure adjustment at high pressure.

[0006] The present application provides a shock absorber valve, which includes a valve sleeve and a driving mechanism, a pilot valve core, a composite elastic sheet, and a regulating valve seat arranged axially in sequence. The pilot valve core, the composite elastic sheet, and the regulating valve seat are arranged in the valve sleeve;

[0007] The regulating valve seat is axially fixedly connected to the valve sleeve, and an oil inlet valve port is provided at the center of the regulating valve seat;

[0008] The composite elastic sheet includes an inner ring, an outer ring, and outer support arms. The outer ring is fixedly connected to the regulating valve seat, an inner hole is provided at the center of the inner ring, and the inner hole is communicated with the oil inlet valve port;

[0009] The outer support arm is located between the inner ring and the outer ring. One end of the outer support arm is in the same plane as the inner ring, and the other end extends axially to fit with the pilot valve core. The outer support arm is used to provide an axial acting force on the pilot valve core;

[0010] Wherein, a second valve port is formed between the inner ring and the pilot valve core, and a second valve port is formed between the inner ring and the regulating valve seat. The driving mechanism is used to drive the pilot valve core to axially displace to adjust the sizes of the first valve port and the second valve port.

[0011] The present application provides a shock absorber valve including a composite elastic sheet and a regulating valve seat. The composite elastic sheet includes an inner ring, an outer ring and an outer support arm. The outer support arm is located between the inner ring and the outer ring. The outer ring and the regulating valve seat are fixed in the valve sleeve. The outer support arm extends axially and abuts against the pilot valve core, so as to provide an axial acting force on the pilot valve core. Wherein, a second valve port is formed between the inner ring and the pilot valve core, and a first valve port is formed between the inner ring and the regulating valve seat. The second valve port, the inner hole, the first valve port and the oil inlet valve port are arranged axially in sequence. When the fluid below the regulating valve seat needs to enter the pilot valve cavity, it needs to pass through the oil inlet valve port, the inner hole, the first valve port and the second valve port in sequence. The driving mechanism generates an axial downward acting force on the pilot valve core, which can drive the pilot valve core to axially move towards the inner ring direction to change the distance between the pilot valve core and the flat pad part, that is, to change the sizes of the first valve port and the second valve port. At the same time, the outer support arm provides an axial upward acting force on the pilot valve core, so that the driving mechanism needs to overcome the reverse force of the outer support arm on the pilot valve core and the reverse force of the inner ring on the pilot valve core at the same time to drive the pilot valve core to move; when the second valve port and the first valve port are completely closed, the fluid pressure at the lower end of the regulating valve seat gradually increases until it increases to a certain extent, and the fluid pressure pushes the inner ring to axially translate upward, so as to drive the inner ring to reset and open the first valve port; therefore, in the technical solution of the present application, during low-pressure adjustment, the shock absorber valve can be opened with a relatively small pressure, and the shock absorber valve can have the characteristics of a relief valve; at the same time, when the fluid pressure gradually increases to a certain extent, the fluid pressure can drive the pilot valve core to axially move to open the second valve port, which also makes the shock absorber valve have a steep ejection-type pressure regulation characteristic. Therefore, the shock absorber valve of the present application has two characteristics, which are sufficient to meet the occasions with two characteristic requirements. Moreover, when the shock absorber valve is operating, the wear and noise are small, so that the shock absorber valve has a high service life and adjustment accuracy.

[0012] Preferably, an inner support arm is provided between the inner ring and the outer ring. One end of the inner support arm is connected to the inner ring, and the other end is connected to the outer ring;

[0013] The outer support arm is located between the inner support arm and the outer ring.

[0014] Preferably, the pilot spool includes an inner support ring and an outer support ring. The outer support ring is sleeved outside the inner support ring, and there is a gap between the outer wall of the inner support ring and the outer support ring.

[0015] Wherein, the outer diameter of the inner support ring is greater than the inner hole diameter, and the distance between the inner support ring and the inner ring forms a second valve port.

[0016] Preferably, an adjustment groove is provided on the inner support ring. The adjustment groove opens on the end face of the inner support ring facing the composite spring piece, and the opening diameter of the adjustment groove is greater than the inner hole diameter.

[0017] Wherein, the opening diameter of the adjustment groove is less than or equal to the inlet valve port diameter.

[0018] Or,

[0019] The opening diameter of the adjustment groove is greater than the inlet valve port diameter.

[0020] Preferably, the distance between the support ring and the inner ring is less than the distance between the outer support ring and the inner ring.

[0021] The distance between the support ring and the inner ring is greater than the axial width of the first valve port.

[0022] Preferably, the outer arm includes a first free end and a first fixed end, and the projections of the first fixed end and the first free end on the central axis do not overlap.

[0023] The first free end extends circumferentially away from the first fixed end, and the first free end and the first fixed end are not in the same radial direction.

[0024] At least part of the first free end is in contact with the end face of the outer support ring.

[0025] Preferably, the regulating valve seat includes a regulating bracket and a fixed bracket, and the fixed bracket is fixedly connected to the valve sleeve.

[0026] An installation hole is provided at the center of the fixed bracket. The regulating bracket is arranged in the installation hole, and the inlet valve port is arranged on the regulating bracket.

[0027] Wherein, the distance between the regulating bracket and the inner ring forms a first valve port.

[0028] Preferably, a flow-through groove is provided on the end face of the fixed bracket close to the composite spring piece. The flow-through groove is recessed axially away from the composite spring piece.

[0029] Wherein, the distance between the flow-through groove and the inner ring is greater than the distance between the regulating bracket and the inner ring.

[0030] Preferably, there are at least two inner support arms, and a first buffer port is provided between two adjacent inner support arms.

[0031] The first buffer port communicates with the flow-through groove.

[0032] Preferably, the composite elastic sheet further includes a second buffer port for accommodating the outer support arm.

[0033] The fixed end of the outer support arm is connected to one end of the second buffer port.

[0034] The second buffer port communicates with the flow-through groove.

[0035] A shock absorber valve of the present application has at least the following technical effects:

[0036] 1. By providing a composite elastic sheet, both the inner ring and the outer support arm can elastically displace axially, providing an axial acting force on the pilot valve core. Thus, after the second valve port formed by the composite elastic sheet and the pilot valve core and the first valve port formed by the regulating valve seat are closed, the first valve port can be opened under low pressure, and the second valve port can be opened under high pressure, enabling the shock absorber valve to have both a relief valve and a pressure regulating characteristic.

[0037] 2. By providing inner support arms and a first buffer port between the inner ring and the outer ring, the elastic deformation force between the inner ring and the outer ring can be increased, making the sensitivity and resilience better when the inner ring axially displaces relative to the outer ring.

[0038] 3. By setting the inner support ring of the pilot valve core to extend downward beyond the outer support ring, when the pilot valve core axially displaces downward, the inner support ring first acts on the inner ring to drive the inner ring to displace downward, so that the fluid can act on the inner ring to drive the pilot valve core and the inner ring to displace together, opening the first valve port under low pressure, enabling the shock absorber valve to have a relief valve characteristic.

[0039] 4. By providing a flow-through groove on the fixed bracket, which communicates with the first buffer port and the second buffer port, when the first valve port is opened, the flow-through groove communicates with the first valve port, and the fluid can flow from the first valve port into the flow-through groove, then from the flow-through groove into the first buffer port and the second buffer port, and thus flow into the pilot chamber for fluid circulation, thereby assisting the shock absorber valve to open the valve under low pressure. Description of the Drawings

[0040] Figure 1 is a partial three-dimensional structural schematic diagram of a shock absorber valve provided by an embodiment of the present application Figure 1 ;

[0041] Figure 2 is a partial cross-sectional structural schematic diagram of a shock absorber valve provided by an embodiment of the present application;

[0042] Figure 3 is Figure 2 the enlarged schematic view of the partial A;

[0043] Figure 4 is the schematic plan view of the composite shrapnel provided by an embodiment of the present application;

[0044] Figure 5 is the schematic perspective view of the composite shrapnel provided by an embodiment of the present application.

[0045] Reference numerals: 1, valve sleeve; 2, drive mechanism; 3, pilot valve core; 4, composite shrapnel; 5, regulating valve seat; 6, first valve port; 7, second valve port;

[0046] 11, pilot valve cavity; 12, main valve cavity; 13, oil outlet channel;

[0047] 31, inner support ring; 32, outer support ring; 33, adjusting groove; 34, oil outlet hole;

[0048] 41, inner hole; 42, inner ring; 43, inner support arm; 44, first buffer port; 45, second buffer port; 46, outer support arm; 47, outer ring;

[0049] 51, fixed bracket; 52, adjusting bracket; 53, oil inlet valve port. Detailed implementation manners

[0050] In order to enable those skilled in the art to better understand the technical solutions of the present disclosure, the present disclosure will be described in detail, clearly and completely below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present disclosure and are not used to limit the present disclosure.

[0051] In the description of the present application, if the first and second are described only for the purpose of distinguishing technical features, they should not be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence of the indicated technical features.

[0052] Those skilled in the art should understand that in the disclosure of the present application, the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be understood as limiting the present application.

[0053] The following further describes the present application in detail with reference to the accompanying drawings. See Figures 1 to 5 description.

[0054] The present application provides a shock absorber valve, which includes a valve sleeve 1, a housing (not shown in the figure), a driving mechanism 2, a main valve structure (not shown in the figure), and a pilot valve structure. The housing is connected to the upper end of the valve sleeve 1, and there is an oil outlet channel 13 between the housing and the valve sleeve 1; the driving mechanism 2 is arranged in the housing, the pilot valve structure and the main valve structure are arranged in the valve sleeve 1, the main valve structure and the valve sleeve 1 form a main valve chamber 12, the pilot valve structure and the valve sleeve 1 form a pilot valve chamber 11, the main valve chamber 12 and the pilot valve chamber 11 are communicated through an oil inlet valve port 53, the oil outlet channel is communicated with the pilot valve chamber 11, an oil inlet is arranged at the bottom of the main valve chamber 12, fluid flows from the oil inlet to the main valve chamber 12, then enters the pilot valve chamber 11 from the main valve chamber 12 through the oil inlet valve port 53, and then flows from the pilot valve chamber 11 to the oil outlet channel; the shock absorber valve adjusts the oil outlet size and oil outlet speed, thereby adjusting the damping characteristics.

[0055] It should be noted that the working principle of the above shock absorber valve is the prior art, and the present application will not elaborate further.

[0056] In the present application, as Figures 1 to 3 shown, the pilot valve structure of the shock absorber valve of the present application includes a composite spring piece 4, a pilot valve core 3, and a regulating valve seat 5. Among them, the pilot valve core 3, the composite spring piece 4, and the regulating valve seat 5 are arranged in sequence along the axial direction. The driving mechanism 2 acts on the upper end of the pilot valve core 3, and the push rod of the driving mechanism 2, the pilot valve core 3, the composite spring piece 4, the regulating valve seat 5, and the central axis of the valve sleeve 1 are on the same straight line; among them, as Figure 3 shown, the valve sleeve 1 is provided with an installation step, and the installation step acts on the outside of the composite spring piece 4 and the regulating valve seat 5. The installation step is used to limit the composite spring piece 4 and the regulating valve seat 5, so that the composite spring piece 4 and the regulating valve seat 5 can be fixed relative to the valve sleeve 1; among them, a part of the lower end surface of the composite spring piece 4 is attached to the upper end surface of the regulating valve seat 5.

[0057] Specifically, as Figure 2 、 Figure 3 shown, an oil inlet valve port 53 is provided at the center of the regulating valve seat 5. The lower end of the oil inlet valve port 53 is communicated with the main valve chamber 12, and the upper end is communicated with the pilot chamber; the composite spring piece 4 includes a concentric inner ring 42 and an outer ring 47. The outer contour of the outer ring 47 is circular. An inner hole 41 is provided at the center of the inner ring 42. The inner hole 41 is concentric with the inner ring 42. The inner diameter of the inner hole 41 is smaller than the outer diameter of the inner ring 42, and the outer diameter of the inner ring 42 is smaller than the inner diameter of the outer ring 47; and the central axis of the inner hole 41 is on the same straight line as the central axis of the oil inlet valve port 53, and the inner hole 41 is communicated with the oil inlet valve port 53; as Figure 4 、 Figure 5As shown, there is an annular part between the inner ring 42 and the outer ring 47. The outer side of the annular part is connected to the inner side of the outer ring 47, and the inner side of the annular part is connected to the outer side of the inner ring 42. An outer support arm 46 is provided on the annular part. The outer support arm 46 includes a first free end and a first fixed end. The first fixed end is connected to the annular part, and the first free end is the other end of the outer support arm 46. The first free end is not connected to the annular part. And, as Figure 5 shown, the projections of the first fixed end and the first free end on the central axis do not overlap, that is, the first fixed end and the first free end are not at the same axial height. In the natural state, the first fixed end, the inner ring 42 and the outer ring 47 are in the same plane. The first free end extends axially and abuts against the bottom of the pilot valve core 3, thereby providing an axial acting force on the pilot valve core 3. As Figure 2 , Figure 3 shown, there is a spacing between the inner ring 42 and the regulating valve seat 5, and this spacing forms a first valve port 6. There is a spacing between the inner ring 42 and the pilot valve core 3, and this spacing forms a second valve port 7. The second valve port 7, the inner hole 41, the first valve port 6 and the oil inlet valve port 53 are arranged axially in sequence. When the fluid below the regulating valve seat 5 needs to enter the pilot valve cavity 11, it needs to pass through the oil inlet valve port 53, the inner hole 41, the first valve port 6 and the second valve port 7 in sequence. Since there is an outer support arm 46 between the inner ring 42 and the outer ring 47, the inner ring 42 and the outer ring 47 are not completely tightly connected. And as Figure 3 shown, the outer ring 47 is limited and fixed by the installation step and the regulating valve seat 5. Therefore, the inner ring 42 can axially displace relative to the outer ring 47, that is, the inner ring 42 and the outer support arm 46 can provide a reverse acting force on the pilot valve core 3.

[0058] In this embodiment, the aperture of the inner hole 41 is smaller than the diameter of the oil inlet valve port 53, so that the fluid in the main valve cavity 12 can act on the lower end face of the inner ring 42 to drive the inner ring 42 to axially move.

[0059] The working principle in this embodiment is as follows:

[0060] When the driving mechanism 2 drives the pilot valve core 3 to axially displace towards the regulating valve seat 5, that is, when the pilot valve core 3 moves downward, it is first necessary to overcome the reverse acting force provided by the outer support arm 46. When the pilot valve core 3 fits with the upper end of the inner ring 42, the distance between the pilot valve core 3 and the inner ring 42 is zero, and at this time the second valve port 7 is closed.

[0061] When the driving mechanism 2 continues to apply pressure to the pilot valve core 3 and the pilot valve core 3 continues to move downward, it is necessary to overcome the reverse acting force provided by the inner ring 42. When the lower end of the inner ring 42 fits with the upper end of the regulating valve seat 5, the distance between the inner ring 42 and the regulating valve seat 5 is zero, and the first valve port 6 is closed.

[0062] At this time, the oil outlet passage 13 no longer discharges oil, and the fluid in the main valve cavity 12 cannot enter the pilot valve cavity 11 through the oil inlet valve port 53, and the fluid pressure in the main valve cavity 12 gradually increases;

[0063] When the fluid pressure in the main valve cavity 12 increases to a certain extent, the fluid pressure pushes the inner ring 42 to translate axially upward, thereby driving the inner ring 42 to reset, and thus opening the first valve port 6; Therefore, during low-pressure adjustment, with the cooperation of the reaction force of the inner ring 42, a relatively small pressure can open the shock absorber valve, and the shock absorber valve can have the characteristics of a relief valve;

[0064] At the same time, the fluid pressure continues to increase. When the fluid pressure gradually increases to a certain extent, the fluid pressure can drive the pilot valve core 3 to move axially, and cooperate with the reaction force of the outer support arm 46, thereby quickly opening the second valve port 7, so that the shock absorber valve has a steep ejection pressure regulation characteristic;

[0065] Therefore, the shock absorber valve of the present application has two characteristics, which are sufficient to meet the occasions with two characteristic requirements. Moreover, when the shock absorber valve is operating, the wear and noise are small, so that the shock absorber valve has a high service life and adjustment accuracy.

[0066] In another alternative embodiment of the present application, the composite elastic sheet 4 is further developed; as Figure 4 、 Figure 5 shown, an inner support arm 43 is provided between the inner ring 42 and the outer ring 47. The inner support arm 43 includes a first connection end and a second connection end. The inner side of the first connection end is connected to the outer side of the inner ring 42, and the outer side of the second connection end is connected to the inner side of the outer ring 47, so that the inner ring 42 and the outer ring 47 are connected through the inner support arm 43, so that when the inner ring 42 moves axially relative to the outer ring 47, it is more sensitive, and the inner ring 42 has better resilience. In this embodiment, as Figure 4 shown, the outer support arm 46 is located between the inner support arm 43 and the outer ring 47.

[0067] Furthermore, the second connection end extends circumferentially in a direction away from the first connection end, that is, the inner support arm 43 is arranged and distributed in the circumferential direction. Among them, the distance between the first connection end and the center of the circle is smaller than the distance between the second connection end and the center of the circle, that is, the first connection end is closer to the center of the circle, and the second connection end is farther from the center of the circle. The second connection end of the inner support arm 43 extends outward in the circumferential and radial directions relative to the first connection end. In the radial direction, the width of the inner support arm 43 is increased, so that the relative axial displacement deformation amount between the inner ring 42 and the outer ring 47 is larger, and the elasticity of the inner support arm 43 is better, and its ability to reset the inner ring 42 or the outer ring 47 is better.

[0068] Still further, as Figure 4 、 Figure 5As shown, there are at least two inner support arms 43. A first buffer opening 44 is provided between two adjacent inner support arms 43. There is a deformation force between the inner support arms 43 through the first buffer opening 44. When the inner ring 42 or the outer ring 47 is axially displaced, under the cooperation of the inner support arm 43 and the first buffer opening 44, the inner support arm 43 generates a deformation force, enabling the inner ring 42 to axially displace relative to the outer ring 47 more smoothly. Moreover, when the axial acting force on the outer ring 47 or the inner ring 42 disappears, under the action of the inner support arm 43, the inner ring 42 or the inner ring 42 after axial displacement can be reset.

[0069] Furthermore, as Figure 4 , Figure 5 shown, the composite elastic sheet 4 further includes a second buffer opening 45. The second buffer opening 45 is provided on the annular portion and is used to accommodate the outer support arm 46. Wherein, the fixed end of the outer support arm 46 is connected to one end of the second buffer opening 45. When the outer support arm 46 moves toward the first fixed end under axial pressure, and then when the outer support arm 46 and the annular portion are completely in the same plane, the second buffer opening 45 can completely accommodate the outer support arm 46, enabling the outer support arm 46 to be completely in the same plane as the inner ring 42 or the outer ring 47, avoiding interference between the outer support arm 46 and the inner ring 42 or the outer ring 47. The shape profile of the second buffer opening 45 is adapted to the shape profile of the outer support arm 46 when the outer support arm 46 is parallel to the annular portion. Preferably, the shape profile of the second buffer opening 45 can be larger than the shape profile of the outer support arm 46 to ensure that when the outer support arm 46 moves under axial pressure and is in the same plane as the annular portion, the outer support arm 46 will not collide with or interfere with the side of the second buffer opening 45.

[0070] In this embodiment, as Figure 4 shown, the outer support arm 46 is an arc-shaped section structure. The first free end and the first fixed end of the outer support arm 46 are on the same circumferential arc. That is, when the first free end of the outer support arm 46 is pressured to move toward the annular portion, so that when the first free end and the first fixed end are in the same plane, the outer support arm 46 is a regular circular arc section. Among them, the outer support arm 46 is preferably provided with three. The radian of the outer support arm 46 is greater than 0° and less than 180°. The radian of the second buffer opening 45 is greater than the radian of the outer support arm 46, and the arc length of the second buffer opening 45 is greater than the arc length of the outer support arm 46.

[0071] In another alternative embodiment of the present application, the pilot valve core 3 is further expanded; as Figure 2 , Figure 3As shown in the figure, the pilot valve spool 3 includes an inner support ring 31 and an outer support ring 32. The outer support ring 32 is sleeved outside the inner support ring 31. There is a gap between the outer wall of the inner support ring 31 and the outer support ring 32. The upper ends of the inner support ring 31 and the outer support ring 32 are connected, and an oil outlet hole 34 is provided at the connected upper part. The fluid in the pilot chamber flows into the oil outlet passage 13 through the oil outlet hole 34. Among them, the outer diameter of the inner support ring 31 is larger than the aperture of the inner hole 41, so that the inner support ring 31 can act on the inner ring 42. And the distance between the inner support ring 31 and the inner ring 42 forms a second valve port 7, that is, the fluid needs to pass through the inner hole 41 first and then flow laterally through the second valve port 7 to enter the pilot valve chamber 11.

[0072] In this embodiment, as Figure 3 shown, at least part of the first free end is attached to the end face of the outer support ring 32, that is, the outer support arm 46 acts on the outer support ring 32 to provide an axial support for the outer support ring 32.

[0073] Furthermore, the distance between the support ring and the inner ring 42 is smaller than the distance between the outer support ring 32 and the inner ring 42, that is, the lower end of the inner support ring 31 protrudes beyond the lower end of the outer support ring 32. When the pilot valve spool 3 moves axially downward, the inner support ring 31 can act on the inner ring 42 to drive the inner ring 42 to move downward and close the first valve port 6. And the distance between the support ring and the inner ring 42 is larger than the axial width of the first valve port 6, so as to ensure that the inner support ring 31 has enough length to completely close the first valve port 6. Through the cooperation with the first valve port 6, under low pressure, the fluid can act on the inner ring 42 to drive the pilot valve spool 3 and the inner ring 42 to move together to open the first valve port 6, so that the shock absorber valve has the characteristics of a relief valve.

[0074] Furthermore, as Figure 3 shown, an adjustment groove 33 is provided on the inner support ring 31. The adjustment groove 33 opens on the end face of the inner support ring 31 facing the composite elastic sheet 4. The opening diameter of the adjustment groove 33 is larger than the aperture of the inner hole 41, and the opening diameter of the adjustment groove 33 is smaller than the outer diameter of the inner support ring 31. By setting the adjustment groove 33, when the second valve port 7 is closed, the fluid will pass through the inner hole 41 and enter the adjustment groove 33, and the fluid generates a reverse impact force in the adjustment groove 33.

[0075] Among them, when the opening diameter of the adjustment groove 33 is less than or equal to the diameter of the oil inlet valve port 53, after the fluid in the main valve chamber 12 impacts the inner ring 42 to move upward and reset to open the first valve port 6 and the second valve port 7, the reverse impact force in the adjustment groove 33 is not enough to push the inner ring 42 to move downward, and both the first valve port 6 and the second valve port 7 are opened. Even under large flow rates, the fluid directly opens the first valve port 6 and the second valve port 7 at the same time. Therefore, this structure makes the pressure-flow curve of the shock absorber valve relatively steep at large flow rates, having a steep ejection-type pressure regulation characteristic.

[0076] When the opening diameter of the adjusting groove 33 is larger than the diameter of the oil inlet valve port 53, after the fluid in the main valve cavity 12 impacts the inner ring 42 to move upward and reset to open the first valve port 6, and then when the fluid pressure in the main valve cavity 12 increases to a certain extent, the fluid pushes the pilot valve core 3 to move upward to open the second valve port 7; however, since the opening diameter of the adjusting groove 33 is larger than the diameter of the oil inlet valve port 53, therefore, a relatively large reverse impact force is formed by the fluid in the adjusting groove 33, and then the inner ring 42 is pushed to move downward to close the first valve port 6, and only the second valve port 7 is opened; in the structure, the pressure-flow curve of the shock absorber valve is relatively gentle.

[0077] The above two solutions can be selected according to actual needs, or flexibly adjusted to meet the user's needs.

[0078] In another alternative embodiment of the present application, the regulating valve seat 5 is further expanded; as Figure 2 、 Figure 3 shown, the regulating valve seat 5 includes a regulating bracket 52 and a fixing bracket 51. The fixing bracket 51 is fixedly connected to the valve sleeve 1. The composite elastic sheet 4 is located at the upper end of the fixing bracket 51. The fixing bracket 51 acts on the installation step to fix the outer ring 47 of the composite elastic sheet 4; a mounting hole is provided in the center of the fixing bracket 51, and the mounting hole axially penetrates the fixing bracket 51. The regulating bracket 52 is arranged in the mounting hole, and the oil inlet valve port 53 is arranged on the regulating bracket 52, so that the pilot valve cavity 11 and the main valve cavity 12 can be communicated, and the fluid can flow from the main valve cavity 12 through the oil inlet valve port 53 into the pilot valve cavity 11.

[0079] In this embodiment, the distance between the regulating bracket 52 and the inner ring 42 forms the first valve port 6, that is, in the natural state, there is a distance between the top of the regulating bracket 52 and the inner ring 42, that is, the upper end face of the regulating bracket 52 is lower than the upper end face of the fixing bracket 51.

[0080] Further, as Figure 3 shown, the fixing bracket 51 includes a support platform and a flow-through groove. The support platform and the flow-through groove are both located on the end face of the fixing bracket 51 close to the composite elastic sheet 4. The support platform is used to support the outer ring 47. The support platform is located outside the flow-through groove. The flow-through groove is recessed axially in the direction away from the composite elastic sheet 4. The end face of the flow-through groove is lower than the upper end face of the support platform. And the first buffer port 44 and the second buffer port 45 are located at the upper end of the flow-through groove. The first buffer port 44 and the second buffer port 45 are communicated with the flow-through groove. The distance between the flow-through groove and the inner ring 42 is larger than the distance between the regulating bracket 52 and the inner ring 42, that is, the end face of the flow-through groove is higher than the upper end face of the regulating bracket 52, so that the fluid can enter the flow-through groove after passing through the first valve port 6, and enter the pilot valve cavity 11 from the first buffer port 44 and the second buffer port 45.

[0081] It should be noted that, in the case where the embodiments of the present application do not conflict with the solutions and the technical solutions can coexist, they can be arbitrarily combined into new embodiments.

[0082] The above has introduced the present application in detail. Specific examples are used in this article to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the present application and its core idea. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present application, several improvements and modifications can still be made to the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A shock absorber valve, characterized in that, It includes a valve sleeve (1), a driving mechanism (2), a pilot valve core (3), a composite elastic sheet (4), and a regulating valve seat (5) arranged axially in sequence. The pilot valve core (3), the composite elastic sheet (4), and the regulating valve seat (5) are arranged inside the valve sleeve (1). The regulating valve seat (5) is axially fixedly connected to the valve sleeve (1), and an oil inlet valve port (53) is provided at the center of the regulating valve seat (5). The composite elastic sheet (4) includes an inner ring (42), an outer ring (47), and outer support arms (46). The outer ring (47) is fixedly connected to the regulating valve seat (5). An inner hole (41) is provided at the center of the inner ring (42), and the inner hole (41) communicates with the oil inlet valve port (53). The outer support arms (46) are located between the inner ring (42) and the outer ring (47). One end of the outer support arms (46) is in the same plane as the inner ring (42), and the other end extends axially and fits with the pilot valve core (3). The outer support arms (46) are used to provide an axial acting force to the pilot valve core (3). Wherein, a second valve port (7) is formed between the inner ring (42) and the pilot valve core (3), and a second valve port (7) is formed between the inner ring (42) and the regulating valve seat (5). The driving mechanism (2) is used to drive the pilot valve core (3) to axially displace to adjust the sizes of the first valve port (6) and the second valve port (7).

2. The shock absorber valve according to claim 1, wherein Inner support arms (43) are provided between the inner ring (42) and the outer ring (47). One end of the inner support arms (43) is connected to the inner ring (42), and the other end is connected to the outer ring (47). The outer support arms (46) are located between the inner support arms (43) and the outer ring (47).

3. The shock absorber valve according to claim 2, wherein The pilot valve core (3) includes an inner support ring (31) and an outer support ring (32). The outer support ring (32) is sleeved outside the inner support ring (31), and there is a gap between the outer wall of the inner support ring (31) and the outer support ring (32). Wherein, the outer diameter of the inner support ring (31) is larger than the aperture of the inner hole (41), and the distance between the inner support ring (31) and the inner ring (42) forms the second valve port (7).

4. The shock absorber valve according to claim 3, wherein Adjusting grooves (33) are provided on the inner support ring (31). The adjusting grooves (33) open on the end face of the inner support ring (31) facing the composite elastic sheet (4), and the opening diameter of the adjusting grooves (33) is larger than the aperture of the inner hole (41). Wherein, the opening diameter of the adjusting grooves (33) is smaller than or equal to the diameter of the oil inlet valve port (53). Or The opening diameter of the adjusting grooves (33) is larger than the diameter of the oil inlet valve port (53).

5. The shock absorber valve according to claim 3, wherein The distance between the support ring and the inner ring (42) is smaller than the distance between the outer support ring (32) and the inner ring (42). The distance between the support ring and the inner ring (42) is larger than the axial width of the first valve port (6).

6. The shock absorber valve according to claim 3, wherein the outer support arm (46) includes a first free end and a first fixed end, and the projections of the first fixed end and the first free end on the central axis do not overlap; the first free end extends circumferentially away from the first fixed end, and the first free end and the first fixed end are not in the same radial direction; at least a part of the first free end is in contact with the end face of the outer support ring (32).

7. The shock absorber valve according to claim 2, wherein the regulating valve seat (5) includes a regulating bracket (52) and a fixed bracket (51), and the fixed bracket (51) is fixedly connected to the valve sleeve (1); an installation hole is provided at the center of the fixed bracket (51), the regulating bracket (52) is arranged in the installation hole, and the oil inlet valve port (53) is arranged on the regulating bracket (52); wherein, the distance between the regulating bracket (52) and the inner ring (42) forms a first valve port (6).

8. The shock absorber valve according to claim 7, wherein a flow-through groove is provided on the end face of the fixed bracket (51) close to the composite spring piece (4), and the flow-through groove is recessed axially away from the composite spring piece (4); wherein, the distance between the flow-through groove and the inner ring (42) is greater than the distance between the regulating bracket (52) and the inner ring (42).

9. The shock absorber valve according to claim 8, wherein there are at least two inner support arms (43), and a first buffer port (44) is provided between two adjacent inner support arms (43), and the first buffer port (44) is communicated with the flow-through groove.

10. The shock absorber valve according to claim 8, wherein the composite spring piece (4) further includes a second buffer port (45), and the second buffer port (45) is used for accommodating the outer support arm (46); the fixed end of the outer support arm (46) is connected to one end of the second buffer port (45); the second buffer port (45) is communicated with the flow-through groove.

Images