Elastic piece and damper valve

Abstract

According to the elastic piece and the shock absorber valve, the elastic piece comprises an inner ring and an outer ring which are concentrically arranged, and an inner hole is formed in the center of the inner ring; an outer supporting arm is arranged between the inner ring and the outer ring and comprises a first free end and a first fixed end, and the projection of the first fixed end and the projection of the first free end on the central axis are not overlapped. The elastic piece acts in the pilot valve body of the shock absorber valve, the elastic piece has the functions of a spiral spring and a gasket spring at the same time, the assembling procedure of the shock absorber valve can be simplified, the assembling efficiency can be improved, the assembling cost of the shock absorber valve is reduced, complex nonlinear rigidity can be generated, and the shock absorber valve is more stable. Therefore, the damping characteristic control effect of the damper valve is improved. According to the shock absorber valve, when the pilot valve element is controlled, only the elastic pieces are arranged, a spiral spring and a gasket spring do not need to be arranged, the number of the elastic pieces arranged in the shock absorber valve is reduced, then the assembly time of the shock absorber valve is shortened, and the overall manufacturing cost of the shock absorber valve is reduced.

Description

Technical Field

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

[0002] In existing shock absorber valves, most are provided with a triple-spring device. The elastic coefficients of each spring are different, and the triple springs cooperate together to adjust the damping characteristics of the shock absorber valve. Among them, most shock absorber valves include a pilot valve body and a main valve body. The communication relationship between the pilot valve body and the main valve body is regulated by the triple-spring device. Among them, the triple-spring device includes two helical springs and a spacer spring. The two helical springs act on the pilot valve body and the main valve body respectively, and the spacer spring acts between the two helical springs. The two helical springs act on the spacer spring indirectly or directly, and cooperate together to adjust the damping magnitude of the shock absorber valve.

[0003] Therefore, in the pilot valve body of the shock absorber valve commonly seen in the prior art, it is mostly necessary for the helical spring and the spacer spring to act and cooperate together to achieve the adjustment of the pilot valve body in the shock absorber valve. However, such a structure will increase the structural complexity and assembly complexity of the pilot valve body in the shock absorber valve, reduce the manufacturing efficiency and thus increase the manufacturing cost. At the same time, since it is necessary for the helical spring and the spacer spring to cooperate together, it is difficult to regulate and adapt the stiffness generated by the spring device, resulting in difficult regulation of the damping characteristics of the shock absorber valve.

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

[0005] In view of this, aiming at the technical problem that in the shock absorber valve in the above prior art, it is necessary to simultaneously arrange a helical spring and a spacer spring in the pilot valve body to regulate the pilot valve body, resulting in a complex structure of the pilot valve body and a low overall assembly efficiency of the shock absorber valve, thus increasing the manufacturing cost of the shock absorber valve, the present application provides an elastic member and a shock absorber valve. The elastic member acts in the pilot valve body of the shock absorber valve, and the elastic member simultaneously has the functions of a helical spring and a spacer spring, which can simplify the assembly procedure of the shock absorber valve, improve the assembly efficiency, thereby reducing the assembly cost of the shock absorber valve, and can generate a relatively complex non-linear stiffness, thereby improving the control effect on the damping characteristics of the shock absorber valve.

[0006] First Aspect

[0007] The present application provides an elastic member, including a concentric inner ring and outer ring, and an inner hole is provided at the center of the inner ring;

[0008] Wherein, an outer support arm is provided between the inner ring and the outer ring. The outer support 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.

[0009] Compared with the prior art, in the elastic member of the present application, an outer support arm is provided between the inner ring and the outer ring. The outer support arm includes a first free end and a first fixed end. The first fixed end is the connection end, and the first free end is the non-connection end. Among them, 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. Then, the first fixed end of the outer support arm is in the same plane as the inner ring or the outer ring, so that the first free end and the first fixed end of the outer support arm have extensibility in the axial direction. Therefore, when the elastic member is applied to the shock absorber valve, the outer support arm abuts against the pilot spool. When the pilot spool acts on the outer support arm, the outer support arm plays the role of a helical spring. At the same time, the inner ring and the outer ring play the role of a gasket spring, so that the elastic member has the functions of both a helical spring and a gasket spring, reducing the number of elastic members provided in the shock absorber valve, thereby reducing the assembly time of the shock absorber valve and reducing the manufacturing cost.

[0010] Preferably, 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.

[0011] Preferably, the elastic member further includes a second buffer port for accommodating the outer support arm;

[0012] One end of the first fixed end is connected to one end of the second buffer port.

[0013] Preferably, the elastic member further includes an inner support arm, and the inner support arm includes a first connection end and a second connection end;

[0014] The first connection end is connected to the inner ring;

[0015] The second connection end extends circumferentially away from the first connection end and is connected to the outer ring.

[0016] Preferably, the distance between the first connection end and the center of the circle is less than the distance between the second connection end and the center of the circle;

[0017] There are at least two inner support arms, and a first buffer port is provided between two adjacent inner support arms.

[0018] Preferably, the first buffer port includes a first part and a second part. One end of the first part is connected to the second part, and the end of the second part far from the first part extends circumferentially away from the first part;

[0019] Among them, the first part is arc-shaped, the second part is arc-shaped, and the circumferential radius of the first part is smaller than the circumferential radius of the second part.

[0020] Preferably, the elastic member further includes an auxiliary support arm, the auxiliary support arm includes a second free end and a second fixed end, the second fixed end is connected to the first free end, and the second free end extends circumferentially away from the second fixed end.

[0021] Preferably, the projections of the second free end, the second fixed end, and the first free end on the axis overlap.

[0022] Preferably, the first free end and the first fixed end are on the same circumference, and the second free end and the second fixed end are on the same circumference;

[0023] Among them, the distance between the first free end and the center of the circle is less than the distance between the second fixed end and the center of the circle.

[0024] An elastic member of the present application has at least the following technical effects:

[0025] 1. By providing an outer support arm on the elastic member, and the outer support arm includes a first free end and a first fixed end, and the heights of the first free end and the first fixed end in the axial direction are different, so that the outer support arm can provide a large axial deformation. With the cooperation of the inner ring and the outer ring, the elastic member has the functions of both a flat pad spring and a helical spring at the same time, reducing the number of elastic members provided in the shock absorber valve, simplifying the installation process, and reducing the manufacturing cost;

[0026] 2. By providing a second buffer port on the elastic member, the second buffer port is used to accommodate the outer support arm. When the outer support arm moves toward the first fixed end under axial pressure, the second buffer port can completely accommodate the outer support arm, so that the outer support arm can be completely on the same plane as the inner ring or the outer ring, avoiding interference between the outer support arm and the inner ring or the outer ring;

[0027] 3. By providing an auxiliary support arm on the outside of the outer support arm, the second free end and the second fixed end of the auxiliary support arm are at the same axial height, so that the upper end of the outer support arm has a large contact area and can contact the pilot valve core more stably;

[0028] 4. By providing an inner support arm and providing a first buffer port between two adjacent inner support arms, the elastic deformation force between the inner ring and the outer ring can be increased, so that the sensitivity and resilience are better when the inner ring makes an axial displacement relative to the outer ring.

[0029] Second aspect

[0030] The present application provides a shock absorber valve, which includes an elastic member in any embodiment of the first aspect; the shock absorber valve further includes a pilot valve core, a valve sleeve, a housing, a driving mechanism, and a fixing seat. The housing is connected to the upper end of the valve sleeve, the driving mechanism is arranged inside the housing, the pilot valve core and the fixing seat are arranged inside the valve sleeve. There is an oil outlet channel between the housing and the valve sleeve. The pilot valve core is located between the driving mechanism and the fixing seat. The driving mechanism applies an axial force to the pilot valve core. The bottom of the elastic member fits against the fixing bracket, and the first free end of the outer arm of the elastic member abuts against the pilot valve core. The outer arm of the elastic member is used to provide an axial force to the pilot valve core. When controlling the pilot valve core, the shock absorber valve of the present application only sets the elastic member of the first aspect, does not need to set a helical spring and a shim spring, reduces the number of elastic members arranged inside the shock absorber valve, thereby reducing the assembly time of the shock absorber valve and reducing the overall manufacturing cost of the shock absorber valve. Description of the Drawings

[0031] Figure 1 is a schematic plan view of the elastic member provided in Embodiment 1 of the present application;

[0032] Figure 2 is a schematic three-dimensional view of the elastic member provided in Embodiment 1 of the present application;

[0033] Figure 3 is a schematic side view of the elastic member provided in Embodiment 1 of the present application;

[0034] Figure 4 is a schematic plan view of the elastic member provided in Embodiment 2 of the present application;

[0035] Figure 5 is a schematic three-dimensional view of the elastic member provided in Embodiment 2 of the present application;

[0036] Figure 6 is a schematic side view of the elastic member provided in Embodiment 2 of the present application;

[0037] Figure 7 is a schematic plan view of the elastic member provided in Embodiment 3 of the present application;

[0038] Figure 8 is a schematic three-dimensional view of the elastic member provided in Embodiment 3 of the present application;

[0039] Figure 9 is a schematic side view of the elastic member provided in Embodiment 3 of the present application;

[0040] Figure 10 is a schematic plan view of the elastic member provided in Embodiment 4 of the present application;

[0041] Figure 11 is a schematic three-dimensional view of the elastic member provided in Embodiment 4 of the present application;

[0042] Figure 12 It is a schematic side view structure diagram of the elastic member provided in the fourth embodiment of the present application;

[0043] Figure 13 It is a schematic partial structure diagram of a shock absorber valve provided in an embodiment of the present application.

[0044] Reference numerals: 1, elastic member; 2, pilot spool; 3, housing; 4, valve sleeve; 5, push rod; 6, fixed seat; 7, oil outlet passage; 8, first valve port; 9, second valve port; 21, inner support ring; 22, outer support ring; 61, fixed bracket; 62, adjustment bracket;

[0045] 11, inner ring; 12, outer ring; 13, outer support arm; 14, inner support arm; 15, first buffer port; 16, second buffer port; 17, inner hole; 18, auxiliary support arm;

[0046] 131, first free end; 132, first fixed end; 141, first connection end; 142, second connection end; 151, first part; 152, second part; 181, second fixed end; 182, second free end. Detailed implementation manners

[0047] In order to enable those skilled in the art to better understand the technical solutions of the present disclosure, the following provides a detailed, clear, and complete description of the present disclosure in combination with 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.

[0048] 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.

[0049] Those skilled in the art should understand that in the disclosure of the present application, the orientation or positional relationships indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the accompanying drawings. These are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element indicated must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be understood as limitations to the present application.

[0050] The following further describes the present application in detail with reference to the accompanying drawings. See as Figures 1 to 13 Description.

[0051] First aspect

[0052] Such asFigures 1 to 12 As shown, the present application provides an elastic member 1, which is applied to the pilot valve structure of a shock absorber valve. It has elasticity and is used to assist the pilot valve structure in regulating the damping characteristics of the shock absorber valve. The following is a description of the specific implementation of the elastic member 1 of the present application.

[0053] Embodiment 1

[0054] As Figures 1 to 3 shown, in this embodiment, the elastic member 1 includes a concentric inner ring 11 and an outer ring 12. The outer contour of the outer ring 12 is circular. An inner hole 17 is provided at the center of the inner ring 11, and the inner hole 17 is concentric with the inner ring 11. The inner diameter of the inner hole 17 is smaller than the outer diameter of the inner ring 11, and the outer diameter of the inner ring 11 is smaller than the inner diameter of the outer ring 12. As Figure 1 shown, inner support arms 14 are provided between the inner ring 11 and the outer ring 12. The inner support arms 14 include a first connection end 141 and a second connection end 142. The inner side of the first connection end 141 is connected to the outer side of the inner ring 11, and the outer side of the second connection end 142 is connected to the inner side of the outer ring 12, so that the inner ring 11 and the outer ring 12 are connected through the inner support arms 14. At least two inner support arms 14 are provided, and a first buffer port 15 is provided between two adjacent inner support arms 14. Therefore, the inner support arms 14 have a deformation force through the first buffer port 15. When the inner ring 11 or the outer ring 12 is axially displaced, under the cooperation of the inner support arms 14 and the first buffer port 15, the inner support arms 14 generate a deformation force, enabling the inner ring 11 to axially displace relatively smoothly with respect to the outer ring 12. Moreover, when the axial acting force on the outer ring 12 or the inner ring 11 disappears, under the action of the inner support arms 14, the axially displaced inner ring 11 or inner ring 11 can be reset.

[0055] In addition to increasing the deformation effect of the inner support arms 14, the first buffer port 15 can allow fluid to pass through, and to a certain extent, it can limit the fluid flow through the elastic member 1, achieving a shock absorption effect.

[0056] Specifically, the inner support arms 14 are further described; as Figure 1 shown, the second connection end 142 extends circumferentially in a direction away from the first connection end 141, that is, the inner support arms 14 are arranged and distributed in the circumferential direction. Among them, the distance between the first connection end 141 and the center of the circle is smaller than the distance between the second connection end 142 and the center of the circle, that is, the first connection end 141 is closer to the center of the circle, and the second connection end 142 is farther from the center of the circle. The second connection end 142 of the inner support arm 14 extends circumferentially and radially outward relative to the first connection end 141. In the radial direction, the width of the inner support arm 14 is increased, so that the relative axial displacement deformation amount between the inner ring 11 and the outer ring 12 is larger, and the elasticity of the inner support arm 14 is better, and its ability to reset the inner ring 11 or the outer ring 12 is better.

[0057] Specifically, the first buffer port 15 is further described as follows; as Figure 1 shown, the first buffer port 15 includes a first part 151 and a second part 152. One end of the first part 151 is connected to one end of the second part 152. Both the first part 151 and the second part 152 are arc-shaped structures. Among them, the end of the second part 152 away from the first part 151 extends circumferentially in a direction away from the first part 151, so that the first buffer port 15 formed by the first part 151 and the second part 152 is arranged to extend in the circumferential direction; in this embodiment, the first part 151 is basically distributed along the circumference of the same diameter, the second part 152 is basically distributed along the circumference of the same diameter, and the radius of the circumference where the first part 151 is located is smaller than the radius of the circumference where the second part 152 is located, that is, in the same radial direction, the second part 152 is shifted outward relative to the first part 151; it should be noted that in this embodiment, the contour structure of the first buffer port 15 determines the contour structure of the inner support arm 14, as Figure 1 shown, with the cooperation of the first part 151 and the second part 152, the radial width of the middle part of the inner support arm 14 is smaller. On the one hand, it saves the material of the inner support arm 14, and on the other hand, it increases the elastic force and deformation force of the inner support arm 14.

[0058] In this embodiment, as Figure 1 shown, a buffer part is provided between the first part 151 and the second part 152. The buffer part is an arc-shaped structure. The buffer part makes the connection between the first part 151 and the second part 152 relatively smooth, that is, makes the outer contour of the connection part between the middle part of the inner support arm 14 and the first connection end 141 and the second connection end 142 relatively smooth, reduces stress concentration, and increases the structural strength of the inner support arm 14.

[0059] As Figure 1 shown, in this embodiment, both the inner support arm 14 and the first buffer port 15 are provided with three. Among them, the included angle between the ends of the first parts 151 of two adjacent first buffer ports 15 is θ1, and the included angle between the ends of the second parts 152 of two adjacent first buffer ports 15 is θ2. Among them, θ1 = θ2 = 120°. Then, the arc length angle of the connection surface between the first connection end 141 and the inner ring 11 is 120 degrees, and the arc length angle of the connection surface between the second connection end 142 and the outer ring 12 is 120 degrees, so that the connection surfaces of the inner support arm 14 with the outer ring 12 and the inner ring 11 are larger, ensuring sufficient connection stability.

[0060] Among them, flare openings are provided at both the ends of the first part 151 and the second part 152. The flare openings are circular, and the diameter of the flare openings is larger than the radial width of the first part 151 and the second part 152.

[0061] Further, the elastic member 1 is further described; as Figures 1 to 3As shown, the elastic member 1 has an annular portion. The outer side of the annular portion is connected to the inner side of the outer ring 12, and the inner side of the annular portion is connected to the inner side of the inner ring 11 or the outer side of the inner support arm 14. In this embodiment, the elastic member 1 includes both the inner support arm 14 and the annular portion, that is, the inner side of the annular portion is connected to the outer side of the inner support arm 14.

[0062] Specifically, the annular portion includes an outer support arm 13. The outer support arm 13 includes a first free end 131 and a first fixed end 132. The first fixed end 132 is connected to the annular portion. The first free end 131 is the other end of the outer support arm 13 and is not connected to the annular portion. And, as Figure 2 、 Figure 3 shown, the projections of the first fixed end 132 and the first free end 131 on the central axis do not overlap, that is, the first fixed end 132 and the first free end 131 are not at the same axial height. In this embodiment, in the natural state, the first fixed end 132 and the inner ring 11 or the outer ring 12 are on the same plane, and the first free end 131 is higher or lower than the first fixed end 132, so that the first free end 131 of the outer support arm 13 has extensibility in the axial direction relative to the first fixed end 132. Therefore, when the elastic member 1 is applied to the shock absorber valve, the first free end 131 of the outer support arm 13 preferentially abuts against the pilot spool 2. When the pilot spool 2 acts on the outer support arm 13, the outer support arm 13 increases the acting height of the elastic member 1 on the pilot spool 2 in the axial direction. The outer support arm 13 functions as a helical spring. At the same time, the inner ring 11 and the outer ring 12 function as a gasket spring, so that the elastic member 1 has the functions of both a helical spring and a gasket spring, reducing the number of elastic members 1 provided in the shock absorber valve, thereby reducing the assembly time of the shock absorber valve and the manufacturing cost.

[0063] It should be noted that in this embodiment, taking the center of the inner hole 17 as the central axis of the elastic member 1, the projections of the inner ring 11 and the outer ring 12 on the central axis may overlap or may be set not to overlap, and can be reasonably set according to corresponding requirements during actual use. In this embodiment, the inner ring 11, the annular portion, and the outer ring 12 are preferably arranged on the same plane, that is, their projections on the central axis overlap.

[0064] Furthermore, a further description is made of the outer support arm 13. As Figures 1 to 3 shown, the first free end 131 extends circumferentially in a direction away from the first fixed end 132, and the first free end 131 and the first fixed end 132 are not in the same radial direction, that is, the outer support arm 13 extends circumferentially. The projection of the outer support arm 13 on the annular portion is circular arc-shaped, so that the outer support arm 13 has good elasticity and reset ability.

[0065] As Figure 3As shown, the end of the first free end 131 is arched. The end of the first free end 131 is not the highest point of the outer support arm 13. The highest point of the first free end 131 is at the protruding point of the arched part. The extreme end of the first free end 131 bends downward, so that when the first free end 131 contacts the pilot valve core 2, it can avoid the axial impact between the first free end 131 and the pilot valve core 2, and can increase the contact stability between the first free end 131 and the pilot valve core 2.

[0066] Correspondingly, as Figure 1 , Figure 2 shown, the elastic member 1 further includes a second buffer port 16. The second buffer port 16 is arranged on the annular part. The second buffer port 16 is used to accommodate the outer support arm 13. Among them, one end of the first fixed end 132 is connected to the second buffer port 16. When the outer support arm 13 moves toward the first fixed end 132 under the axial pressure, and then when the outer support arm 13 and the annular part are completely in the same plane, the second buffer port 16 can completely accommodate the outer support arm 13, so that the outer support arm 13 can be completely in the same plane as the inner ring 11 or the outer ring 12, avoiding interference between the outer support arm 13 and the inner ring 11 or the outer ring 12. The shape profile of the second buffer port 16 is adapted to the shape profile of the outer support arm 13 when it is parallel to the annular part; preferably, the shape profile of the second buffer port 16 can be larger than the shape profile of the outer support arm 13 to ensure that when the outer support arm 13 moves under the axial pressure and is in the same plane as the annular part, the outer support arm 13 will not collide with or interfere with the side of the second buffer port 16.

[0067] As Figure 1 shown, in this embodiment, the outer support arm 13 is an arc-shaped section structure. The first free end 131 and the first fixed end 132 of the outer support arm 13 are on the same circumferential arc. That is, when the first free end 131 of the outer support arm 13 is under pressure and moves toward the annular part, so that when the first free end 131 and the first fixed end 132 are in the same plane, the outer support arm 13 is a regular circular arc section; among them, three outer support arms 13 are provided, and the radian of the outer support arm 13 is θ3. Among them, in this embodiment, 0° < θ3 < 180°.

[0068] Specifically, in this embodiment, 50° ≤ θ3 ≤ 60°. The radian of the second buffer port 16 is greater than the radian of the outer support arm 13, and the arc length of the second buffer port 16 is greater than the arc length of the outer support arm 13.

[0069] Embodiment Two

[0070] Compared with Embodiment One, the difference in this embodiment is that the outer support arm 13 is further improved in this embodiment.

[0071] As Figures 3 to 6As shown, in this embodiment, the arc length of the outer support arm 13 is greater than that of the outer support arm 13 in the first embodiment, and the radian of the outer support arm 13 is greater than that in the first embodiment. In this embodiment, the radian of the outer support arm 13 satisfies 90° ≤ θ3 ≤ 110°.

[0072] In addition, as Figure 5 , Figure 6 shown, the arch trend of the first free end 131 of the outer support arm 13 is relatively gentle, that is, the distance from the highest point of the first free end 131 of the outer support arm 13 to the end of the first free end 131 is farther, thereby making the contact surface between the outer support arm 13 and the pilot valve core 2 larger and the contact more stable.

[0073] Embodiment Three

[0074] Compared with the first embodiment, the difference in this embodiment is that the outer support arm 13 is further improved in this embodiment.

[0075] As Figures 7 to 9 shown, the elastic member 1 further includes an auxiliary support arm 18. As Figure 8 shown, the auxiliary support arm 18 includes a second free end 182 and a second fixed end 181. Among them, the second fixed end 181 is connected to the first free end 131, and the second free end 182 extends circumferentially in a direction away from the second fixed end 181. Among them, in this embodiment, the second free end 182 extends towards the first fixed end 132 of the connected outer support arm 13.

[0076] As Figure 9 shown, the projections of the second free end 182, the second fixed end 181, and the first free end 131 on the axis overlap, that is, in the axial direction, the auxiliary support arm 18 and the first free end 131 of the outer support arm 13 are on the same horizontal plane at the same height, and the auxiliary support arm 18 as a whole approaches a plane. With such a structure, with the cooperation of the auxiliary support arm 18 with the outer support arm 13, the connection area between the free end of the outer support arm 13 and the pilot valve core 2 can be increased, thereby increasing the contact stability of the elastic member 1 with the pilot valve core 2.

[0077] Furthermore, as Figure 7 shown, the first free end 131 and the first fixed end 132 are on the same circumference, and the second free end 182 and the second fixed end 181 are on the same circumference, so that the outer support arm 13 is an arc segment structure, and the auxiliary support arm 18 is also an arc segment structure. Among them, the distance from the first free end 131 to the center of the circle is less than the distance from the second fixed end 181 to the center of the circle, that is, the radius of the circle where the auxiliary support arm 18 is located is greater than the radius of the circle where the outer support arm 13 is located, so that the auxiliary support arm 18 is connected to the outside of the outer support arm 13, and interference with the first buffer port 15 or the inner support arm 14 when the auxiliary support arm 18 is arranged inside can be reduced.

[0078] AsFigure 7 As shown in the figure, in this embodiment, two outer support arms 13 are provided, and the radian of the outer support arm 13 is 120° ≤ θ3 ≤ 150°; the radian of the auxiliary support arm 18 is θ4, and 30° ≤ θ4 ≤ 60°; among them, preferably, θ3 is 140° and θ4 is 60°.

[0079] Embodiment Four

[0080] This embodiment is different from Embodiment Three in that the auxiliary support arm 18 is further improved in this embodiment.

[0081] As Figures 10 to 12 shown, in this embodiment, the auxiliary support arm 18 includes two second free ends 182 and one second fixed end 181. Among them, the second fixed end 181 is located in the middle of the two first free ends 131, and the second fixed end 181 is located at the inner middle position of the auxiliary support arm 18. Among the two second free ends 182, one second free end 182 extends circumferentially towards the first fixed end 132 of the connected outer support arm 13, and the other free end extends in the opposite direction circumferentially, so that parallel extension section structures are provided on both sides of the first free end 131 in the circumferential direction. Thus, in the cooperation between the auxiliary support arm 18 and the outer support arm 13, the supporting area of the elastic member 1 for the pilot spool 2 is larger, the force application points are more uniform, the contact is more stable, and the stability of the pilot spool 2 in adjusting the damping characteristics of the shock absorber valve is improved.

[0082] As Figure 10 shown, in this embodiment, two outer support arms 13 are provided, the radian θ3 of the outer support arm 13 is 120°, and the radian of the auxiliary support arm 18 is θ4 = 45°.

[0083] Second aspect

[0084] This application provides a shock absorber valve. The shock absorber valve includes the elastic member 1 in any of the embodiments provided in the first aspect. The elastic member 1 is applied to the pilot valve part of this application and is used to assist the pilot spool 2 in regulating the damping characteristics of the shock absorber valve.

[0085] As Figure 13 shown, in this embodiment, the shock absorber valve further includes a pilot spool 2, a valve sleeve 4, a housing 3, a driving mechanism, and a fixed seat 6. The housing 3 is connected to the upper end of the valve sleeve 4, and there is an oil outlet channel 7 between the housing 3 and the valve sleeve 4. The oil outlet channel 7 is located at the upper end position of the pilot spool 2; the driving mechanism is arranged in the housing 3, the pilot spool 2 and the fixed seat 6 are arranged in the valve sleeve 4, the pilot spool 2 is located between the driving mechanism and the fixed seat 6, the fixed seat 6 is fixed relative to the valve sleeve 4, and the end of the driving mechanism facing the valve sleeve 4 abuts against the pilot spool 2. The driving mechanism can apply an axial force to the pilot spool 2, thereby pushing the pilot spool 2 to perform an axial displacement in the valve sleeve 4;

[0086] Among them, at least a part of the bottom of the elastic member 1 is in contact with the fixed seat 6, and the elastic member 1 is fixed relative to the valve sleeve 4; the first free end 131 of the outer support arm 13 of the elastic member 1 extends axially toward the pilot valve core 2, and the first free end 131 of the elastic member 1 abuts against the bottom of the pilot valve core 2. The outer support arm 13 of the elastic member 1 is used to provide an axial force to the pilot valve core 2, so that the pilot valve core 2 has a tendency to move toward the driving mechanism.

[0087] Specifically, as Figure 13 shown, the valve sleeve 4 is provided with an installation groove. The fixed seat 6 includes a fixed bracket 61 and an adjustment bracket 62. The fixed bracket 61 is arranged in the installation groove. The elastic member 1 is located at the upper end of the fixed bracket 61. The fixed bracket 61 and the table surface of the installation groove limit and fix the outer ring 12 part of the elastic member 1, so that the elastic member 1 can be relatively fixed relative to the valve sleeve 4. At the same time, the fixed bracket 61 is provided with a flow-through groove and a flow-through hole. The flow-through hole is located in the middle of the fixed bracket 61 and axially penetrates the fixed bracket 61, so that the pilot valve cavity and the main valve cavity can communicate, and the fluid can flow from the main valve cavity into the pilot valve cavity through the flow-through hole. Among them, the adjustment bracket 62 is arranged in the flow-through hole, and the adjustment bracket 62 is provided with a valve port for the fluid to flow through.

[0088] The flow-through groove is located on the upper end surface of the fixed bracket 61. The end surface of the flow-through groove is lower than the outer ring end surface of the fixed bracket 61. The outer ring end surface of the fixed bracket 61 is used to support the outer ring 12 of the elastic member 1 and part of the annular part. There is a gap between the upper end surface of the flow-through groove and the annular part, the inner ring 11 and the lower end surface of the inner support arm 14, through which the fluid can pass. In this embodiment, the upper end surface of the adjustment bracket 62 is lower than the outer ring end surface of the fixed bracket 61 but higher than the upper end surface of the flow-through groove, so that the inner ring 11, the inner support arm 14 and the annular part of the elastic member 1 do not fit with the upper end surface of the adjustment bracket 62 in the natural state. And among them, the inner diameter of the inner ring 11 is smaller than the valve port diameter of the adjustment bracket 62, the outer diameter of the inner ring 11 is larger than the outer diameter of the adjustment bracket 62, and the outer diameter of the annular part is larger than the inner diameter of the outer ring end surface, so as to form a first valve port 8 between the lower end surface of the inner ring 11 and the upper end surface of the adjustment bracket 62.

[0089] As Figure 13 shown, in this embodiment, the pilot valve core 2 includes an inner support ring 21 and an outer support ring 22. The outer support ring 22 is sleeved outside the inner support ring 21. There is a gap between the outer wall of the inner support ring 21 and the outer support ring 22. Among them, the lower end of the inner support ring 21 protrudes beyond the lower end of the outer support ring 22. The central axes of the inner support ring 21, the inner ring 11, the valve port and the flow-through hole are on the same straight line, and the outer diameter of the inner support ring 21 is larger than the inner hole 17 and smaller than the outer diameter of the inner ring 11, so that when the pilot valve core 2 moves axially toward the elastic member 1, the inner support ring 21 can abut against the inner ring 11. Among them, a second valve port 9 is formed between the lower end surface of the inner support ring 21 and the upper end surface of the inner ring 11.

[0090] Among them, the cooperation principle of the elastic member 1 and the pilot valve is as follows:

[0091] When the inner diameter D1 of the inner support ring 21 is smaller than the valve port diameter D2 of the adjusting bracket 62, as Figure 2 shown: When the load applied by the push rod 5 of the driving mechanism on the pilot valve core 2 is smaller than the preload applied by the outer support arm 13 of the elastic member 1 on the pilot valve core 2, the pilot valve core 2 stays at the initial position;

[0092] When the load applied by the push rod 5 of the driving mechanism on the pilot valve core 2 is greater than the preload applied by the outer support arm 13 of the elastic member 1 on the pilot valve core 2, the pilot valve core 2 leaves the initial position and moves downward;

[0093] When the inner support ring 21 of the pilot valve core 2 contacts the inner ring 11 of the elastic member 1 and the contact force is zero, it is called the first critical position of the pilot valve core 2;

[0094] When the pilot valve core 2 is at the first critical position and when the back pressure at the oil outlet is constant, as the inlet flow rate increases, the inlet pressure first increases slightly and then increases significantly;

[0095] When the elastic member 1 contacts the upper end face of the adjusting bracket 62 under the push of the pilot valve core 2 and the contact force is zero, it is called the second critical position of the pilot valve core 2;

[0096] When the contact force is greater than zero, it is called the fully closed stage of the pilot valve core 2;

[0097] When the pilot valve core 2 is between the first critical position and the second critical position, it is called the transition stage of the pilot valve core 2;

[0098] When the pilot valve core 2 is at the second critical position or in the fully closed stage, the external load acting on the push rod 5 of the driving mechanism remains unchanged. As the inlet flow rate increases, the inlet pressure increases rapidly. When the pressure reaches a specific value, the pressure increase rate rapidly decreases. This pressure is called the valve opening pressure for this specific external load (the external load acting on the push rod 5 of the driving mechanism).

[0099] As the flow rate increases, the elastic member 1 gradually deviates from the second critical position and moves towards the first critical position. At extremely high flow rates, it even crosses the first critical position.

[0100] In the above process, the elastic member 1, the pilot valve core 2, and the push rod 5 of the driving mechanism are in contact with each other and do not separate. The fluid flows through the gap between the elastic member 1 and the adjusting bracket 62.

[0101] When the inner diameter D1 of the inner support ring 21 is greater than the valve port diameter D2 of the adjusting bracket 62:

[0102] When the load exerted on the pilot valve core 2 by the push rod 5 of the driving mechanism is less than the preload exerted on the pilot valve core 2 by the outer support arm 13 of the elastic member 1, the pilot valve core 2 stays at the initial position, and the oil drain groove circled in the figure becomes the main throttle port;

[0103] When the load exerted on the pilot valve core 2 by the push rod 5 of the driving mechanism is greater than the preload exerted on the pilot valve core 2 by the outer support arm 13 of the elastic member 1, the pilot valve core 2 moves away from the initial position and moves downward;

[0104] When the inner support ring 21 of the pilot valve core 2 contacts the inner ring 11 of the elastic member 1 and the contact force is zero, it is called the first critical position of the pilot valve core 2;

[0105] When the pilot valve core 2 is at the first critical position and when the back pressure at the oil outlet is constant, as the inlet flow rate increases, the inlet pressure first increases slightly and then increases significantly;

[0106] When the elastic member 1 contacts the upper end face of the adjustment bracket 62 under the push of the pilot valve core 2 and the contact force is zero, it is called the second critical position of the pilot valve core 2; when the contact force is greater than zero, it is called the fully closed stage of the pilot valve core 2; when the pilot valve core 2 is between the first critical position and the second critical position, it is called the transition stage of the pilot valve core 2;

[0107] When the pilot valve core 2 is at the second critical position or in the fully closed stage, the external load acting on the push rod 5 of the driving mechanism remains unchanged. As the inlet flow rate increases, the inlet pressure increases rapidly. When the pressure reaches a certain critical pressure, the valve port opens and the pressure increase rate decreases rapidly, which is called the first critical pressure;

[0108] When the pressure reaches the first critical pressure, the hydraulic pressure overcomes the pre-tightening force exerted by the elastic member 1 on the adjustment bracket 62, and the first valve port 8 opens;

[0109] After the first valve port 8 opens, as the flow rate increases, the pressure increase rate decreases significantly;

[0110] When the pressure continues to increase to a certain specific value, the contact force between the pilot valve core 2 and the elastic member 1 decreases to zero under the action of the hydraulic pressure, which is called the second critical pressure;

[0111] When the pressure is greater than the second critical pressure, the pilot valve core 2 and the elastic member 1 start to separate, and the second valve port 9 opens;

[0112] After the second valve port 9 opens, as the flow rate increases, the pressure increase rate continues to decrease;

[0113] When the pressure continues to increase to a certain specific value, the first valve port 8 gradually closes, which is called the third critical pressure.

[0114] As described above, when the relationship between the inner support ring 21 in the shock absorber valve and the inner diameter of the valve port is set differently, it can be seen that when D1 < D2, the pressure-flow curve is steeper in the large-flow section, and when D1 > D2, the pressure-flow curve is flatter in the large-flow section. Therefore, in actual use, the relationship between D1 and D2 can be flexibly adjusted according to actual needs to meet the requirements. At the same time, the elastic member 1 is used to cooperate with the pilot valve core 2 to adjust the damping characteristics of the shock absorber valve. In this embodiment, the elastic member 1 replaces the scheme of the helical spring and the gasket spring in the prior art pilot valve mechanism. On the one hand, it is convenient to adjust the stiffness of the elastic member 1, and by adjusting the shape of the outer support arm 13, complex non-linear stiffness can be generated to meet the requirements. On the other hand, the number of elastic members 1 provided in the shock absorber valve is reduced, thereby reducing the assembly time of the shock absorber valve and the overall manufacturing cost of the shock absorber valve.

[0115] It should be noted that the embodiments of the present application can be arbitrarily combined into new embodiments when the solutions do not conflict and the technical solutions can coexist.

[0116] The present application has been introduced in detail above. 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 of this technology, 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. An elastic member, characterized in that, It includes a concentrically arranged inner ring (11) and an outer ring (12), and an inner hole (17) is provided at the center of the inner ring (11); Wherein, an outer support arm (13) is provided between the inner ring (11) and the outer ring (12), the outer support arm (13) includes a first free end (131) and a first fixed end (132), and the projections of the first fixed end (132) and the first free end (131) on the central axis do not overlap.

2. The elastic member according to claim 1, wherein The first free end (131) extends circumferentially away from the first fixed end (132), and the first free end (131) and the first fixed end (132) are not in the same radial direction.

3. The elastic member according to claim 1, wherein The elastic member (1) further includes a second buffer opening (16), and the second buffer opening (16) is used to accommodate the outer support arm (13); One of the ends of the first fixed end (132) is connected to the second buffer opening (16).

4. The elastic member according to claim 1, wherein The elastic member (1) further includes an inner support arm (14), and the inner support arm (14) includes a first connection end (141) and a second connection end (142); The first connection end (141) is connected to the inner ring (11); The second connection end (142) extends circumferentially away from the first connection end (141), and the second connection end (142) is connected to the outer ring (12).

5. The elastic member according to claim 4, wherein The distance between the first connection end (141) and the center of the circle is less than the distance between the second connection end (142) and the center of the circle; There are at least two inner support arms (14), and a first buffer opening (15) is provided between two adjacent inner support arms (14).

6. The elastic member according to claim 5, wherein The first buffer opening (15) includes a first part (151) and a second part (152), one end of the first part (151) is connected to the second part (152), and the end of the second part (152) away from the first part (151) extends circumferentially away from the first part (151); Wherein, the first part (151) is arc-shaped, the second part (152) is arc-shaped, and the radius of the circle where the first part (151) is located is less than the radius of the circle where the second part (152) is located.

7. The elastic member according to any one of claims 1 to 6, wherein The elastic member (1) further includes an auxiliary support arm (18), the auxiliary support arm (18) includes a second free end (182) and a second fixed end (181), the second fixed end (181) is connected to the first free end (131), and the second free end (182) extends circumferentially away from the second fixed end (181).

8. The elastic member according to claim 7, wherein The projections of the second free end (182), the second fixed end (181) and the first free end (131) on the axis overlap.

9. The elastic member according to claim 7, wherein the first free end (131) and the first fixed end (132) are on the same circumference, and the second free end (182) and the second fixed end (181) are on the same circumference; wherein the distance between the first free end (131) and the center of the circle is less than the distance between the second fixed end (181) and the center of the circle.

10. A shock absorber valve, characterized in that, Comprising the elastic member (1) according to any one of claims 1 to 9.

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