Actuator, suspension system and vehicle

Abstract

The embodiment of the utility model provides an actuator, a suspension system and a vehicle, the actuator comprises a first assembly and a second assembly which can relatively move along the axial direction of the actuator, and a first cavity and a second cavity are formed between the first assembly and the second assembly; the first assembly comprises a center shaft, and a compression channel and a stretching channel are arranged in the center shaft. The compression channel is suitable for achieving communication between the first cavity and the second cavity in the compressed state of the actuator, and the stretching channel is suitable for achieving communication between the second cavity and the first cavity in the stretched state of the actuator. The size of the actuator can be reduced, the structure of the actuator is simplified, and the cost of the actuator is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to an actuator, a suspension system and a vehicle. Background Art

[0002] With the development of vehicle technology, the requirements of passengers for riding comfort are constantly increasing. To improve the efficiency of the actuator, simplify the structure and improve the installation convenience, current active suspensions gradually adopt actuators. To ensure the stability and comfort of handling, dampers are usually arranged on the actuators.

[0003] In the prior art, an actuator is added outside the damper. However, the parallel arrangement of the actuator and the damper increases the radial arrangement space of the active suspension, which is not conducive to the arrangement of the vehicle chassis and other components and increases the difficulty of arrangement. Summary of the Utility Model

[0004] In view of the above problems, embodiments of the present utility model are proposed to provide an actuator, a suspension system and a vehicle that overcome the above problems or at least partially solve the above problems.

[0005] To solve the above problems, embodiments of the present utility model disclose an actuator, including:

[0006] A first component and a second component that can move relative to each other along the axis of the actuator, and a first cavity and a second cavity are formed between the first component and the second component;

[0007] The first component includes a central shaft, and a compression channel and a stretching channel are arranged in the central shaft;

[0008] The compression channel is adapted to connect the first cavity and the second cavity in the compression state of the actuator, and the stretching channel is adapted to connect the second cavity and the first cavity in the stretching state of the actuator.

[0009] Optionally, the actuator further includes a valve member, and the valve member is adapted to control the opening of the compression channel and the closing of the stretching channel in the compression state of the actuator; the valve member is adapted to control the opening of the stretching channel and the closing of the compression channel in the stretching state of the actuator.

[0010] Optionally, the valve member is arranged in the central shaft and is respectively connected to the compression channel and the stretching channel.

[0011] Optionally, the compression channel includes a first oil inlet channel and a first oil outlet channel, the first oil inlet channel is communicated with the first cavity, and the first oil outlet channel is communicated with the second cavity;

[0012] The valve member is disposed between the first oil inlet passage and the first oil outlet passage and is adapted to open or close the path from the first oil inlet passage to the first oil outlet passage.

[0013] Optionally, the stretching passage includes a second oil inlet passage and a second oil outlet passage. The second oil inlet passage communicates with the second cavity, and the second oil outlet passage communicates with the first cavity.

[0014] The valve member is disposed between the second oil inlet passage and the second oil outlet passage and is adapted to open or close the path from the second oil inlet passage to the second oil outlet passage.

[0015] Optionally, one end of the second oil outlet passage away from the valve member is connected to the first oil inlet passage.

[0016] One end of the first oil outlet passage away from the valve member is connected to the second oil inlet passage.

[0017] Optionally, the valve member includes a slide valve and / or a check valve.

[0018] Optionally, the valve member includes two slide valves, namely a first slide valve and a second slide valve. The central shaft includes a first shaft section and a second shaft section, and at least part of the compression passage and the stretching passage are provided on both the first shaft section and the second shaft section.

[0019] Along the axial direction of the actuator, the first shaft section, the first slide valve, the second slide valve and the second shaft section are connected in sequence. When the actuator is in the compressed state, the first slide valve is adapted to open the compression passage, and the second slide valve is adapted to close the stretching passage; when the actuator is in the stretched state, the second slide valve is adapted to open the stretching passage, and the first slide valve is adapted to close the compression passage.

[0020] Optionally, the slide valve has a flow-through valve disc and a first flow channel and a second flow channel arranged at intervals. The first flow channel and the second flow channel are communicated with each other, and the second flow channel of the first slide valve is communicated with the second flow channel of the second slide valve.

[0021] When the actuator is in the compressed state, the first flow channel of the first slide valve is communicated with the compression passage in the first shaft section through the flow-through valve disc, and the second flow channel of the second slide valve is communicated with the compression passage in the second shaft section.

[0022] When the actuator is in the stretched state, the first flow channel of the second slide valve is communicated with the stretching passage in the second shaft section through the flow-through valve disc, and the second flow channel of the first slide valve is communicated with the

[0023] stretching passage in the first shaft section.

[0024] Optionally, the spool valve further includes a first elastic member;

[0025] The first elastic member is disposed in the first flow channel and is connected to the flow control valve plate.

[0026] Optionally, the second flow channel includes a first sub-flow channel and a second sub-flow channel;

[0027] The first sub-flow channel of the first spool valve communicates with its first flow channel and also communicates with the second sub-flow channel of the second spool valve; the first sub-flow channel of the second spool valve communicates with its first flow channel and also communicates with the second sub-flow channel of the first spool valve;

[0028] When the actuator is in the compressed state, the second sub-flow channel of the second spool valve communicates with the compression channel in the second shaft section;

[0029] When the actuator is in the stretched state, the second sub-flow channel of the first spool valve communicates with the stretching channel in the first shaft section.

[0030] Optionally, the spool valve includes a first enclosing plate and a second enclosing plate, the first enclosing plate is sleeved outside the second enclosing plate and is connected to the second enclosing plate;

[0031] The inner wall of the second enclosing plate encloses to form the first flow channel, and the outer wall of the second enclosing plate and the inner wall of the first enclosing plate enclose to form the second flow channel.

[0032] Optionally, a first diversion hole is provided on the second enclosing plate, and the first flow channel and the second flow channel communicate through the first diversion hole.

[0033] Optionally, the spool valve includes two first partition plates, the first partition plates are disposed in the first flow channel, one side of the first partition plate is connected to the first enclosing plate, and the other side of the first partition plate is connected to the second enclosing plate;

[0034] The two first partition plates are spaced along the circumferential direction of the actuator to divide the second flow channel into the first sub-flow channel and the second sub-flow channel.

[0035] Optionally, the valve member further includes a second partition plate, one side of the second partition plate is respectively connected to the first enclosing plate and the second enclosing plate of the first spool valve, and the other side is respectively connected to the first enclosing plate and the second enclosing plate of the second spool valve;

[0036] The second partition plate is provided with a second diversion hole and a third diversion hole. The second diversion hole is respectively communicated with the first sub-channel of the first slide valve and the second sub-channel of the second slide valve, and the third diversion hole is respectively communicated with the first sub-channel of the second slide valve and the second sub-channel of the first slide valve.

[0037] Optionally, the first cavity and the second cavity are both filled with a pressure medium.

[0038] Optionally, the first component includes a housing and a first magnetic member disposed on the housing, and the second component includes a fixing frame and a second magnetic member disposed on the fixing frame. The second magnetic member is disposed opposite to the first magnetic member.

[0039] Optionally, the fixing frame is disposed inside the housing. One end of the central shaft is connected to the housing, and the other end of the central shaft is embedded in the fixing frame.

[0040] One end of the fixing frame close to the central shaft and the housing enclose to form the first cavity, and one end of the fixing frame far from the central shaft and the housing enclose to form the second cavity. A part of the central shaft is disposed inside the first cavity.

[0041] Optionally, the actuator includes a first sealing member. One end of the fixing frame close to the central shaft and the housing are hermetically connected through the first sealing member.

[0042] Optionally, the actuator further includes a first guiding member. The first guiding member and the first sealing member are spaced apart along the axial direction of the actuator.

[0043] One end of the fixing frame close to the central shaft and the housing are slidably connected through the first guiding member.

[0044] Optionally, the actuator further includes a second sealing member. The fixing frame and the central shaft are hermetically connected through the second sealing member.

[0045] Optionally, the actuator further includes a second guiding member. The second guiding member and the second sealing member are spaced apart along the axial direction of the actuator.

[0046] The fixing frame and the central shaft are slidably connected through the second guiding member.

[0047] Optionally, the first component includes a support arm adapted to connect to a wheel.

[0048] One end of the support arm is fixedly connected to one end of the fixing frame far from the central shaft, and the other end of the support arm passes through the bottom of the housing.

[0049] Optionally, the support arm is provided with a connection channel adapted to communicate with the compression channel and the second cavity, or the connection channel is adapted to communicate with the stretching channel and the second cavity.

[0050] Optionally, the actuator further includes a third seal, and one end of the support arm close to the fixed bracket is sealingly connected to the housing through the third seal.

[0051] Optionally, the actuator further includes a third guide, and the third guide and the third seal are arranged at intervals along the axial direction of the actuator;

[0052] One end of the support arm close to the fixed bracket is slidably connected to the housing through the third guide.

[0053] Optionally, the actuator further includes a fourth seal, and the support arm is sealingly connected to the bottom of the housing through the fourth seal.

[0054] Optionally, the actuator further includes a fourth guide, and the fourth guide and the fourth seal are arranged at intervals along the axial direction of the actuator;

[0055] The support arm is slidably connected to the bottom of the housing through the fourth guide.

[0056] Optionally, the actuator further includes a second elastic member disposed in the housing;

[0057] The second elastic member is sleeved outside the central shaft, and both ends of the second elastic member are abutted against the fixed bracket and the housing respectively.

[0058] Optionally, the first component is a stator component, the second component is a rotor component, the first component is adapted to be connected to the vehicle frame, and the second component is adapted to be connected to the wheel.

[0059] In a second aspect, an embodiment of the present invention further discloses a suspension system including the above actuator.

[0060] In a third aspect, an embodiment of the present invention further discloses a vehicle including the above actuator or the above suspension system.

[0061] The embodiments of the present invention have the following advantages:

[0062] In the embodiment of the present utility model, the first component and the second component can move relative to each other along the axial direction of the actuator, and a first cavity and a second cavity are formed between the first component and the second component. When the actuator is in the compressed state, the compression channel can communicate the first cavity and the second cavity, so that the pressure medium can flow from the first cavity into the second cavity to generate a damping force; when the actuator is in the stretched state, the stretching channel can communicate the second cavity and the first cavity, so that the pressure medium can flow from the second cavity into the first cavity to generate a damping force. Since both the compression channel and the stretching channel are arranged within the central axis, there is no need to occupy the installation space of the actuator, which is beneficial to reducing the size of the actuator, simplifying the structure of the actuator, and reducing the cost of the actuator. Description of the Drawings

[0063] Figure 1 is a schematic structural view of an actuator of the present utility model;

[0064] Figure 2 is a front view of an actuator of the present utility model;

[0065] Figure 3 is the present utility model Figure 2 a sectional view taken along the AA direction;

[0066] Figure 4 is the present utility model Figure 3 a partially enlarged view in;

[0067] Figure 5 is a sectional view of an upper housing of the present utility model;

[0068] Figure 6 is a sectional view of a lower end cover of the present utility model;

[0069] Figure 7 is a mating view of a central shaft and a valve member of the present utility model;

[0070] Figure 8 is a schematic structural view of a first shaft section of the present utility model;

[0071] Figure 9 is a sectional view of a first shaft section of the present utility model;

[0072] Figure 10 is a schematic structural view of a second shaft section of the present utility model;

[0073] Figure 11 is a sectional view of a second shaft section of the present utility model;

[0074] Figure 12 is a schematic structural view of a valve member of the present utility model;

[0075] Figure 13 is a schematic structural diagram of another valve component of the present utility model;

[0076] Figure 14 is a cross-sectional view of a valve component of the present utility model;

[0077] Figure 15 is a cross-sectional view of a support arm of the present utility model.

[0078] Explanation of reference numerals in the drawings:

[0079] 1. First component; 11. Central axis; 111. Compression channel; 1111. First oil inlet channel; 1112. First oil outlet channel; 112. Tensile channel; 1121. Second oil inlet channel; 1122. Second oil outlet channel; 113. First shaft section; 114. Second shaft section; 115. First limiting part; 12. Housing; 121. Upper housing; 122. Tower top thread; 123. Step hole; 124. Installation groove; 125. Installation part; 126. Lower end cover; 13. First magnetic part; 2. Second component; 21. Fixed frame; 22. Second magnetic part; 23. Support arm; 231. Connection channel; 31. First cavity; 32. Second cavity; 5. Valve component; 51. Slide valve; 511. Flow valve plate; 512. First flow channel; 513. Second flow channel; 5131. First sub-flow channel; 5132. Second sub-flow channel; 514. First elastic part; 515. Second limiting part; 516. First enclosing plate; 517. Second enclosing plate; 5171. First diversion hole; 518. First partition plate; 52. First slide valve; 53. Second slide valve; 54. Second partition plate; 541. Second diversion hole; 542. Third diversion hole; 61. First guiding and sealing assembly; 62. Second guiding and sealing assembly; 63. Third guiding and sealing assembly; 64. Fourth guiding and sealing assembly; 641. Fourth sealing part; 642. Fourth guiding part; 7. Second elastic part; 8. Thread sealing ring. Detailed implementation manners

[0080] In order to make the above objects, features and advantages of the present utility model more obvious and understandable, the present utility model will be further described in detail below with reference to the drawings and specific implementation manners.

[0081] The terms "first" and "second" in the description and claims of this application may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / " generally means that the related objects before and after are in an "or" relationship.

[0082] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model 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, and therefore should not be construed as a limitation on the present utility model.

[0083] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0084] One of the core concepts of the embodiments of the present utility model is to disclose an actuator, combined with Figures 1 to 4 As shown, the actuator includes: a first component 1 and a second component 2 that can move relative to each other along the axial direction of the actuator, and a first cavity 31 and a second cavity 32 are formed between the first component 1 and the second component 2; the first component 1 includes a central shaft 11, and a compression channel 111 and a stretching channel 112 are provided on the central shaft 11; the compression channel 111 is adapted to connect the first cavity 31 and the second cavity 32 in the compression state of the actuator, and the stretching channel 112 is adapted to connect the second cavity 32 and the first cavity 31 in the stretching state of the actuator.

[0085] In the embodiments of the present utility model, the first component 1 and the second component 2 can move relative to each other along the axial direction of the actuator, and a first cavity 31 and a second cavity 32 are formed between the first component 1 and the second component 2. In the compression state of the actuator, the compression channel 111 can connect the first cavity 31 and the second cavity 32, so that the pressure medium can flow from the first cavity 31 into the second cavity 32 to generate a damping force; in the stretching state of the actuator, the stretching channel 112 can connect the second cavity 32 and the first cavity 31, so that the pressure medium can flow from the second cavity 32 into the first cavity 31 to generate a damping force. Since both the compression channel 111 and the stretching channel 112 are provided inside the central shaft 11, there is no need to occupy the installation space of the actuator, which is beneficial to reducing the size of the actuator, simplifying the structure of the actuator, and reducing the cost of the actuator.

[0086] In the embodiment of the present utility model, the first component 1 and the second component 2 can move relative to each other along the axial direction of the actuator. Among them, the first component 1 can reciprocate relative to the second component 2 along the axial direction of the actuator, that is, the first component 1 is the mover component, and correspondingly, the second component 2 can be the stator component. Or, the second component 2 can reciprocate relative to the first component 1 along the axial direction of the actuator, that is, the first component 1 can be the stator component, and correspondingly, the second component 2 can be the mover component. The central shaft 11 can be part of the stator component or part of the mover component, and can be specifically designed according to actual needs. The embodiment of the present utility model does not make specific limitations on this.

[0087] Specifically, a first cavity 31 and a second cavity 32 can be formed between the first component 1 and the second component 2. A compression channel 111 and a stretching channel 112 can be arranged in the central shaft 11. When the actuator is in the compressed state, the compression channel 111 can communicate the first cavity 31 and the second cavity 32, facilitating the pressure medium to flow from the first cavity 31 into the second cavity 32. When the actuator is in the stretched state, the stretching channel 112 can communicate the second cavity 32 and the first cavity 31, facilitating the pressure medium to flow from the second cavity 32 into the first cavity 31. The pressure medium can generate a damping force during the flowing process, enabling the actuator to have damping ability, that is, realizing the function of a damper, being suitable for weakening or even eliminating road surface excitation, and improving the smoothness and comfort of vehicle driving.

[0088] Optionally, the first cavity 31 and the second cavity 32 can both be filled with a pressure medium. During the flowing process of the pressure medium, it is easier to generate a damping force.

[0089] In some embodiments, the pressure medium can also be a pressure gas or phosphate ester, etc. The embodiment of the present utility model only takes the medium as hydraulic oil as an example for illustration, and other situations can be set with reference.

[0090] Specifically, when the compression channel 111 is opened, the compression channel 111 can transmit the pressure medium, and the communication between the first cavity 31 and the second cavity 32 can be realized; when the stretching channel 112 is opened, the stretching channel 112 can transmit the pressure medium, and the communication between the second cavity 32 and the first cavity 31 can be realized. Further, when the compression channel 111 is opened, the stretching channel 112 can be closed, and when the compression channel 111 is closed, the stretching channel 112 can be opened, enabling the pressure medium to flow unidirectionally when the pressure medium is exchanged between the first cavity 31 and the second cavity 32, facilitating better generation of the damping force and better elimination of road surface excitation.

[0091] In the embodiment of the present utility model, the compression channel 111 and the stretching channel 112 can be arranged inside the central shaft 11, that is, at least part of the structure of the damper can be arranged inside the central shaft 11. By reasonably utilizing the space inside the central shaft 11, the overall size of the actuator can be reduced, and it is convenient to simplify the structure of the actuator and reduce the cost.

[0092] Optionally, the two ends of the compression channel 111 along the axial direction of the actuator are arranged staggeredly along the direction perpendicular to the axial direction of the actuator. The staggered arrangement of the two ends of the compression channel 111 makes the path of the pressure medium flowing from the first cavity 31 to the second cavity 32 more complex, which can further improve the damping effect of the damper, so as to have the ability to eliminate more road excitations. Similarly, the two ends of the stretching channel 112 along the axial direction of the actuator are arranged staggeredly along the direction perpendicular to the axial direction of the actuator. The staggered arrangement of the two ends of the stretching channel 112 makes the path of the pressure medium flowing from the second cavity 32 to the first cavity 31 more complex, which can further improve the damping effect of the damper, so as to have the ability to eliminate more road excitations.

[0093] In the embodiment of the present utility model, the actuator can adjust its own stiffness and height according to road conditions, can eliminate road excitations, has a long service life, and can also improve the passing performance, driving stability and comfort of the vehicle.

[0094] During the driving of the vehicle, with the cooperation of the second component 2 and the first component 1, part of the path excitations can be eliminated. The pressure medium exchange between the first cavity 31 and the second cavity 32 can further absorb the road excitations and buffer the impact transmitted by the road surface, which is convenient for increasing the service life of the actuator, improving the passing performance of the vehicle, the operation stability of the vehicle, the driving stability and comfort.

[0095] Optionally, the first component 1 and the second component 2 move relative to each other along the axial direction of the actuator, which can drive the volume change of the first cavity 31 and the second cavity 32. As shown in the figure, when the first component 1 moves upward or the second component 2 moves downward, the actuator switches to the compression state. The volume of the first cavity 31 decreases, and the volume of the second cavity 32 increases. In this way, the pressure in the first cavity 31 is greater than the pressure in the second cavity 32, and the compression channel 111 can be conducted, so that the pressure medium flows from the first cavity 31 into the second cavity 32, and the damping force of the compression stroke can be generated. When the first component 1 moves downward or the second component 2 moves upward, in the stretching state of the actuator, the volume of the first cavity 31 increases, and the volume of the second cavity 32 decreases. In this way, the pressure in the second cavity 32 is greater than the pressure in the first cavity 31, and the stretching channel 112 can be conducted, so that the pressure medium flows from the second cavity 32 into the first cavity 31, and the damping force of the stretching stroke can be generated.

[0096] In some specific embodiments, the first component 1 is a stator component, and the second component 2 is a rotor component. The first component 1 is adapted to be connected to the vehicle frame, and the second component 2 is adapted to be connected to the wheel. In this way, on the one hand, the second component 2 can drive the wheel to move to actively eliminate road excitations. On the other hand, the road excitations are transmitted to the second component 2 through the wheel, causing the second component 2 to move relative to the first component 1, so that the actuator can switch between the compression state and the stretching state, and the pressure medium can switch between the first cavity 31 and the second cavity 32 to generate damping to passively eliminate road excitations, improving the operation stability, driving smoothness and comfort of the vehicle.

[0097] In the embodiments of the present utility model, only the case where the first component 1 is a stator component and the second component 2 is a rotor component is specifically described. When the first component 1 is a rotor component and the second component 2 is a stator component, reference can be made for setting.

[0098] In some embodiments, the actuator further includes a valve member 5. The valve member 5 is adapted to control the opening of the compression channel 111 and the closing of the stretching channel 112 in the compression state of the actuator; the valve member 5 is adapted to control the opening of the stretching channel 112 and the closing of the compression channel 111 in the stretching state of the actuator.

[0099] In the embodiments of the present utility model, by controlling the opening and closing of the compression channel 111 and the stretching channel 112 through the valve member 5, the accuracy and sensitivity of the actuator to switch between the compression state and the stretching state can be improved. Moreover, a stronger damping force can be generated when the pressure medium passes through the valve member 5.

[0100] Specifically, when the valve member 5 opens the compression channel 111, it can close the stretching channel 112. When the valve member 5 closes the compression channel 111, it can open the stretching channel 112.

[0101] Optionally, the valve member 5 is arranged inside the central shaft 11 and is respectively connected to the compression channel 111 and the stretching channel 112, which can improve the reliability of simultaneously controlling the opening and closing of the compression channel 111 and the stretching channel 112. Moreover, arranging the valve member 5 inside the central shaft 11 is convenient for reasonably utilizing the space inside the central shaft 11.

[0102] Optionally, the compression channel 111 includes a first oil inlet channel 1111 and a first oil outlet channel 1112. The first oil inlet channel 1111 is communicated with the first cavity 31, and the first oil outlet channel 1112 is communicated with the second cavity 32; the valve member 5 is arranged between the first oil inlet channel 1111 and the first oil outlet channel 1112 and is adapted to open or close the path from the first oil inlet channel 1111 to the first oil outlet channel 1112.

[0103] In the embodiment of the present utility model, when the valve member 5 opens the path from the first oil inlet passage 1111 to the first oil outlet passage 1112, the pressure medium in the first cavity 31 can flow through the first oil inlet passage 1111 and the first oil outlet passage 1112 in sequence, and then enter the second cavity 32, realizing the one-way flow of the pressure medium from the first cavity 31 to the second cavity 32. When the valve member 5 closes the path from the first oil inlet passage 1111 to the first oil outlet passage 1112, the pressure medium stops flowing from the first cavity 31 to the second cavity 32.

[0104] Optionally, the stretching passage 112 includes a second oil inlet passage 1121 and a second oil outlet passage 1122. The second oil inlet passage 1121 communicates with the second cavity 32, and the second oil outlet passage 1122 communicates with the first cavity 31. The valve member 5 is disposed between the second oil inlet passage 1121 and the second oil outlet passage 1122 and is adapted to open or close the path from the second oil inlet passage 1121 to the second oil outlet passage 1122.

[0105] In the embodiment of the present utility model, when the valve member 5 opens the path from the second oil inlet passage 1121 to the second oil outlet passage 1122, the pressure medium in the second cavity 32 can flow through the second oil inlet passage 1121 and the second oil outlet passage 1122 in sequence, and then enter the first cavity 31, realizing the one-way flow of the pressure medium from the second cavity 32 to the first cavity 31. When the valve member 5 closes the path from the second oil inlet passage 1121 to the second oil outlet passage 1122, the pressure medium stops flowing from the second cavity 32 to the first cavity 31.

[0106] Specifically, in the compressed state of the actuator, the pressure in the first cavity 31 is greater than the pressure in the second cavity 32, so that the pressure medium flows from the first cavity 31 to the first oil inlet passage 1111 and can push open the valve member 5 to conduct the first oil inlet passage 1111 and the first oil outlet passage 1112. In the stretched state of the actuator, the pressure in the second cavity 32 is greater than the pressure in the first cavity 31, so that the pressure medium flows from the second cavity 32 to the second oil inlet passage 1121 and can push open the valve member 5 to conduct the second oil inlet passage 1121 and the second oil outlet passage 1122.

[0107] Optionally, one end of the second oil outlet passage 1122 away from the valve member 5 is connected to the first oil inlet passage 1111. In this way, the pressure medium in the second cavity 32 can sequentially pass through the second oil inlet passage 1121, the second oil outlet passage 1122 and the first oil inlet passage 1111, and then flow into the first cavity 31, which can increase the flow path of the pressure medium and further improve the damping effect in the stretched state of the actuator, so as to have the ability to eliminate more road excitations.

[0108] Optionally, one end of the first oil outlet passage 1112 away from the valve member 5 is connected to the second oil inlet passage 1121. In this way, the pressure medium in the first cavity 31 can sequentially pass through the first oil inlet passage 1111, the first oil outlet passage 1112, and the second oil inlet passage 1121, and then flow into the second cavity 32, which can increase the flow path of the pressure medium and further improve the damping effect in the compressed state of the actuator, so as to have the ability to eliminate more road excitations.

[0109] Optionally, the valve member 5 includes a spool valve 51 and / or a check valve to improve the structural diversity of the valve member 5.

[0110] Specifically, the valve member 5 can only include a check valve, can only include a spool valve 51, or can also include both a check valve and a spool valve 51 at the same time.

[0111] Optionally, the valve member 5 includes two spool valves 51, which are the first spool valve 52 and the second spool valve 53 respectively. The central shaft 11 includes a first shaft section 113 and a second shaft section 114. At least part of the compression passage 111 and the tension passage 112 are provided on both the first shaft section 113 and the second shaft section 114; along the axial direction of the actuator, the first shaft section 113, the first spool valve 52, the second spool valve 53, and the second shaft section 114 are sequentially connected. In the compressed state of the actuator, the first spool valve 52 is adapted to open the compression passage 111, and the second spool valve 53 is adapted to close the tension passage 112; in the stretched state of the actuator, the second spool valve 53 is adapted to open the tension passage 112, and the first spool valve 52 is adapted to close the compression passage 111.

[0112] In the embodiment of the present utility model, the first spool valve 52 and the second spool valve 53 can independently control the operation of the damping in the compressed state and the stretched state respectively, which is convenient for providing precise and predictable control under different driving conditions. Moreover, the structure of the spool valve 51 is simple and the cost is low, thus reducing the structural complexity and cost of the actuator; the spool valve 51 does not require gas addition, so there is no need for too high processing accuracy requirements for the actuator; the medium flowing through the spool valve 51 can better generate damping, and can also improve the working stability and service life of the damper.

[0113] Specifically, at least part of the compression passage 111 and the tension passage 112 are provided on both the first shaft section 113 and the second shaft section 114. As shown in the figure, a first oil inlet passage 1111 and a second oil outlet passage 1122 are provided in the first shaft section 113, and a second oil inlet passage 1121 and a first oil outlet passage 1112 are provided in the second shaft section 114.

[0114] Specifically, the two spool valves 51 can be integrated into one component. For example, the two spool valves 51 can be stacked axially along the central axis 11; alternatively, the two spool valves 51 can also be provided independently. For example, the two spool valves 51 can be arranged side by side radially along the central axis 11.

[0115] In this embodiment, along the axial direction of the actuator, the first shaft section 113, the first spool valve 52, the second spool valve 53, and the second shaft section 114 are connected in sequence. During the flow of the pressure medium, it can flow through the first shaft section 113, the first spool valve 52, the second spool valve 53, and the second shaft section 114 in sequence, or the second shaft section 114, the second spool valve 53, the first spool valve 52, and the first shaft section 113. The first shaft section 113 and the first spool valve 52 can be connected by a threaded seal ring 8 to ensure the sealing performance between the first shaft section 113 and the first spool valve 52. The second shaft section 114 and the second spool valve 53 can be connected by a threaded seal ring 8 to ensure the sealing performance between the second shaft section 114 and the second spool valve 53.

[0116] Specifically, in this embodiment, the central axis 11 includes a first shaft section 113 and a second shaft section 114, that is, the central axis 11 is of a segmented design, and the valve member 5 is arranged between the first shaft section 113 and the second shaft section 114. In some embodiments, the central axis 11 can also be an integrated component, and the valve member 5 can be arranged inside the central axis 11.

[0117] Optionally, the first spool valve 52 and the second spool valve 53 can be symmetrically arranged along the axial direction of the actuator, which can improve the structural stability of the valve member 5.

[0118] Optionally, one end of the first shaft section 113 facing the first spool valve 52 has a first limiting portion 115, and one end of the first spool valve 52 facing the first shaft section 113 has a second limiting portion 515; the first limiting portion 115 and the second limiting portion 515 are in limiting cooperation, which can improve the assembly reliability between the first shaft section 113 and the first spool valve 52. The first limiting portion 115 and the second limiting portion 515 can be fixed by means of threaded connection or welding.

[0119] Similarly, one end of the second shaft section 114 facing the second spool valve 53 has a first limiting portion 115, and one end of the second spool valve 53 facing the second shaft section 114 has a second limiting portion 515; the first limiting portion 115 and the second limiting portion 515 are in limiting cooperation, which can improve the assembly reliability between the second shaft section 114 and the second spool valve 53.

[0120] Optionally, one of the first limiting portion 115 and the second limiting portion 515 is a limiting groove, and the other is a corresponding limiting protrusion, so that the first limiting portion 115 and the second limiting portion 515 can achieve concave-convex fit, and the limiting effect is better. Figures 7 to 14As shown, a case is illustrated where the first limiting portion 115 is a stepped protrusion and the second limiting portion 515 is a stepped groove. Other cases can be set with reference to this.

[0121] Optionally, the slide valve 51 has a flow valve plate 511, and a first flow channel 512 and a second flow channel 513 which are arranged at intervals. The first flow channel 512 and the second flow channel 513 are communicated with each other. The second flow channel 513 of the first slide valve 52 is communicated with the second flow channel 513 of the second slide valve 53, which is convenient for realizing the communication between the first slide valve 52 and the second slide valve 53, and improving the reliability of the exchange of the pressure medium between the first cavity 31 and the second cavity 32.

[0122] In the compressed state of the actuator, the first flow channel 512 of the first slide valve 52 is communicated with the compression channel 111 in the first shaft section 113 through the flow valve plate 511, and the second flow channel 513 of the second slide valve 53 is communicated with the compression channel 111 in the second shaft section 114, so that the pressure medium needs to push open the flow valve plate 511 of the first slide valve 52, and then sequentially passes through the first flow channel 512 of the first slide valve 52, the second flow channel 513 of the first slide valve 52, and the second flow channel 513 of the second slide valve 53 to realize the opening of the compression channel 111. The complexity of the flow path of the pressure medium can be increased, which is convenient for improving the damping effect, so that more road excitations can be eliminated in the compressed state of the actuator.

[0123] In the stretched state of the actuator, the first flow channel 512 of the second slide valve 53 is communicated with the stretching channel 112 in the second shaft section 114 through the flow valve plate 511, and the second flow channel 513 of the first slide valve 52 is communicated with the stretching channel 112 in the first shaft section 113, so that the pressure medium needs to push open the flow valve plate 511 of the second slide valve 53, and then sequentially passes through the first flow channel 512 of the second slide valve 53, the second flow channel 513 of the second slide valve 53, and the second flow channel 513 of the first slide valve 52 to realize the opening of the stretching channel 112. The complexity of the flow path of the pressure medium can be increased, which is convenient for improving the damping effect, so that more road excitations can be eliminated in the stretched state of the actuator.

[0124] Optionally, the slide valve 51 further includes a first elastic member 514; the first elastic member 514 is arranged in the first flow channel 512 and is connected to the flow valve plate 511.

[0125] In the embodiment of the present invention, the flow valve plate 511 is opened after being stressed to allow the passage of the pressure medium, and the flow valve plate 511 can squeeze the first elastic member 514, so that the first elastic member 514 is compressed; after the force on the flow valve plate 511 disappears, the resilience of the first elastic member 514 can drive the flow valve plate 511 to reset and close to block the flow of the pressure medium, so as to improve the reliability of opening and closing the compression channel 111 and the stretching channel 112.

[0126] Specifically, the first elastic member 514 can be a spring or a shrapnel, etc. The first elastic member 514 can be fixedly connected or abutted to the flow valve plate 511. The first elastic member 514 can be fixed in the first flow channel 512, or the first elastic member 514 can be only placed in the first flow channel 512.

[0127] Specifically, when the flow valve plate 511 is stressed, it squeezes the first elastic member 514. The greater the compression amount of the first elastic member 514, the greater the opening degree of the flow valve plate 511 and the smaller the damping force. The damping force can be adaptively adjusted according to such a relationship.

[0128] Optionally, the second flow channel 513 includes a first sub-flow channel 5131 and a second sub-flow channel 5132; the first sub-flow channel 5131 of the first spool valve 52 is communicated with its first flow channel 512 and is communicated with the second sub-flow channel 5132 of the second spool valve 53; the first sub-flow channel 5131 of the second spool valve 53 is communicated with its first flow channel 512 and is communicated with the second sub-flow channel 5132 of the first spool valve 52.

[0129] In the compressed state of the actuator, the second sub-flow channel 5132 of the second spool valve 53 is communicated with the compression channel 111 in the second shaft section 114, so that after the pressure medium opens the flow valve plate 511 of the first spool valve 52, it sequentially passes through the first flow channel 512 of the first spool valve 52, the first sub-flow channel 5131 of the first spool valve 52, and the second sub-flow channel 5132 of the second spool valve 53, realizing the opening of the stretching channel 112.

[0130] In the stretched state of the actuator, the second sub-flow channel 5132 of the first spool valve 52 is communicated with the stretching channel 112 in the first shaft section 113, so that after the pressure medium opens the flow valve plate 511 of the second spool valve 53, it sequentially passes through the first flow channel 512 of the second spool valve 53, the first sub-flow channel 5131 of the second spool valve 53, and the second sub-flow channel 5132 of the first spool valve 52, realizing the opening of the stretching channel 112.

[0131] In the embodiment of the present utility model, the valve member 5 can realize two paths for the pressure medium, which can improve the reliability of adjusting the opening and closing of the compression channel 111 and the stretching channel 112.

[0132] Optionally, the spool valve 51 includes a first enclosing plate 516 and a second enclosing plate 517. The first enclosing plate 516 is sleeved outside the second enclosing plate 517 and is connected to the second enclosing plate 517; the inner wall of the second enclosing plate 517 encloses to form the first flow channel 512, and the outer wall of the second enclosing plate 517 and the inner wall of the first enclosing plate 516 enclose to form the second flow channel 513, so that the first flow channel 512 and the second flow channel 513 can be separated by the second enclosing plate 517 and are independently arranged, which is convenient for passing the pressure medium respectively.

[0133] Optionally, a first diversion hole 5171 is provided on the second enclosing plate 517. The first flow channel 512 and the second flow channel 513 are communicated through the first diversion hole 5171, facilitating the inflow of the pressure medium from the first flow channel 512 into the second flow channel 513.

[0134] Specifically, the number of the first diversion holes 5171 may include one or more, and the multiple first diversion

[0135] holes 5171 may be arranged at intervals along the axial direction of the actuator.

[0136] Optionally, the spool valve 5 includes two first partition plates 518. The first partition plates 518 are arranged in the first flow channel 512. One side of the first partition plate 518 is connected to the first enclosing plate 516, and the other side of the first partition plate 518 is connected to the second enclosing plate 517; the two first partition plates 518 are arranged at intervals along the circumferential direction of the actuator to divide the second flow channel 513 into a first sub-flow channel 5131 and a second sub-flow channel 5132.

[0137] In the embodiment of the present utility model, the second flow channel 513 can be divided into a first sub-flow channel 5131 and a second sub-flow channel 5132 by using two first partition plates 518 arranged at intervals along the circumferential direction of the actuator, and the implementation method is simple and convenient.

[0138] Optionally, the valve member 5 further includes a second partition plate 54. One side of the second partition plate 54 is respectively connected to the first enclosing plate 516 and the second enclosing plate 517 of the first spool valve 52, and the other side is respectively connected to the first enclosing plate 516 and the second enclosing plate 517 of the second spool valve 53; a second diversion hole 541 and a third diversion hole 542 are provided on the second partition plate 54. The second diversion hole 541 is respectively communicated with the first sub-flow channel 5131 of the first spool valve 52 and the second sub-flow channel 5132 of the second spool valve 53, and the third diversion hole 542 is respectively communicated with the first sub-flow channel 5131 of the second spool valve 53 and the second sub-flow channel 5132 of the first spool valve 52.

[0139] In the embodiment of the present utility model, the second diversion hole 541 and the third diversion hole 542 are independently arranged, facilitating ensuring that the paths for the valve member 5 to conduct the compression channel 111 and the tension channel 112 are different.

[0140] Specifically, in the embodiment of the present utility model, only the valve member 5 is taken as an example of a rotary body for illustration, and other situations can be set with reference. As shown in the figure, both the first enclosing plate 516 and the second enclosing plate 517 can be of an annular structure and are coaxially arranged and parallel to the axial direction of the actuator. Along the axial direction of the actuator, the heights of the first enclosing plate 516 and the second enclosing plate 517 are the same. The inner diameter of the first enclosing plate 516 is larger than the outer diameter of the second enclosing plate 517, so that a gap between the first enclosing plate 516 and the second enclosing plate 517 can form the second flow channel 513.

[0141] Further, one side of the first partition plate 518 is connected to the inner wall of the first enclosing plate 516, and the other side is connected to the outer wall of the second enclosing plate 517. Along the axial direction of the first enclosing plate 516, the height of the first partition plate 518 is the same as that of the first enclosing plate 516. The two first enclosing plates 516 are arranged at intervals along the circumferential direction of the actuator, and the second flow channel 513 can be divided into an independent first sub-flow channel 5131 and a second sub-flow channel 5132.

[0142] Further, along the axial direction of the actuator, the first slide valve 52 and the second slide valve 53 can be symmetrically arranged, and the two can be separated by a second partition plate 54. The second partition plate 54 can be a flat plate structure, and a second diversion hole 541 and a third diversion hole 542 are dug in the second partition plate 54 to realize the connection between the second diversion hole 541 and the first sub-flow channel 5131 of the first slide valve 52 and the second sub-flow channel 5132 of the second slide valve 53, and the connection between the third diversion hole 542 and the first sub-flow channel 5131 of the second slide valve 53 and the second sub-flow channel 5132 of the first slide valve 52.

[0143] In some other embodiments, the first component 1 includes a housing 12 and a first magnetic member 13 disposed on the housing 12, and the second component 2 includes a fixing frame 21 and a second magnetic member 22 disposed on the fixing frame 21. The second magnetic member 22 is disposed opposite to the first magnetic member 13.

[0144] In the embodiment of the present utility model, the first magnetic member 13 and the second magnetic member 22 are opposite to each other, which is convenient for the two to couple to generate a mutual acting force to realize the relative movement of the first component 1 and the second component 2 along the axial direction of the actuator.

[0145] Optionally, one of the second magnetic member 22 and the first magnetic member 13 is an energized coil, and the other is a permanent magnet. In this way, when the energized coil is energized, a magnetic force is generated between the energized coil and the permanent magnet, which is convenient for controlling the movement of the first component 1 or the second component 2 and can actively eliminate road surface excitation; when the energized coil is de-energized, the road surface excitation is transmitted to the first component 1 through the wheel, causing relative movement and interaction between the energized coil and the permanent magnet. According to Faraday's law of electromagnetic induction, passive energy harvesting power generation can be realized, and energy recovery can be achieved.

[0146] In the embodiment of the present utility model, the actuator can have an active elimination mode and a passive elimination mode. In the active elimination mode, the coupling of the first magnetic member 13 and the second magnetic member 22 can be used to actively drive the movement of the first component 1 or the second component 2, so that the first component 1 or the second component 2 can drive the wheel to move and actively eliminate road surface excitation; in the passive elimination mode, the road surface excitation is transmitted to the first component 1 or the second component 2 through the wheel, which can cause volume changes in the first cavity 31 and the second cavity 32, so that the pressure medium flows to passively eliminate road surface excitation.

[0147] Optionally, the fixing bracket 21 is disposed inside the housing 12. One end of the central shaft 11 is connected to the housing 12, and the other end of the central shaft 11 is embedded in the fixing bracket 21. A first cavity 31 is formed by enclosing the end of the fixing bracket 21 close to the central shaft 11 and the housing 12, and a second cavity 32 is formed by enclosing the end of the fixing bracket 21 far from the central shaft 11 and the housing 12. A part of the central shaft 11 is disposed in the first cavity 31.

[0148] In the embodiment of the present utility model, the relative movement of the fixing bracket 21 and the central shaft 11 along the axial direction of the actuator can drive the volume change of the first cavity 31 and the second cavity 32, and further can realize the flow of the pressure medium to generate damping.

[0149] Specifically, the central shaft 11 can be fixed to the housing 12 by splicing, or the central shaft 11 can also be integrally formed with the housing 12. The central shaft 11 and the housing 12 are connected and combined to form the main body structure of the actuator.

[0150] Specifically, taking the splicing of the central shaft 11 and the housing 12 as an example, a threaded sealing ring 8 can be provided between the central shaft 11 and the housing 12 to ensure the sealing performance of the first cavity 31. As Figure 5 shown, the housing 12 can have a stepped hole 123, and a stepped protrusion can be provided on the corresponding central shaft 11. The stepped protrusion can be fixed in the stepped hole 123 by means of threaded connection or welding.

[0151] Specifically, in combination with Figure 2 、 Figure 5 and Figure 6 shown, the housing 12 can include an upper housing 121 and a lower end cover 126. The upper housing 121 can be connected to the vehicle body through a tower top thread 122. An installation groove 124 for installing and arranging the first magnetic member 13 can be provided on the inner wall of the upper housing 121. The upper housing 121 can be connected to the lower end cover 126 through an installation part 125.

[0152] Specifically, one end of the central shaft 11 can be fixedly connected to the housing 12, and the other end is embedded in the fixing bracket 21 and slidably connected to the fixing bracket 21. Specifically, in combination with Figure 2 and Figure 7 shown, the first shaft section 113 is connected to the housing 12, and the second shaft section 114 is embedded in the first assembly 1.

[0153] Optionally, the actuator includes a first sealing member. The end of the fixing bracket 21 close to the central shaft 11 and the housing 12 are sealed and connected through the first sealing member, which can avoid the leakage of the pressure medium, improve the tightness of the first cavity 31, and further ensure the stiffness of the actuator.

[0154] Specifically, the first seal can be an O-ring. The material of the O-ring can be plastics such as polytetrafluoroethylene or polyurethane. The sealing form of the first seal can be O-shaped sealing, U-shaped sealing, or Struthers sealing, etc.

[0155] Optionally, the actuator further includes a first guiding member. The first guiding member and the first seal are arranged at intervals along the axial direction of the actuator. One end of the fixing bracket 21 close to the central shaft 11 is slidably connected to the housing 12 through the first guiding member. The first guiding member can play a guiding role and improve the reliability of the relative movement between the fixing bracket 21 and the housing 12.

[0156] Specifically, the first guiding member can be a sliding bearing, which can also reduce the sliding friction between the fixing bracket 21 and the housing 12, and improve the structural stability and service life of the actuator.

[0157] Specifically, the material of the sliding bearing can be wear-resistant materials such as copper-based or steel-based materials, and its sliding mating surface is also coated with a wear-resistant coating.

[0158] Specifically, the first seal and the first sliding member can be combined into a first guiding and sealing assembly 61. The first seal is respectively in contact with the fixing bracket 21 and the second assembly 2. The first guiding member is respectively connected to the fixing bracket 21 and the second assembly 2. The first guiding member is arranged on the side of the first seal facing the first cavity 31.

[0159] Optionally, the actuator further includes a second seal. The fixing bracket 21 and the central shaft 11 are hermetically connected through the second seal, which can prevent the leakage of the pressure medium and improve the tightness of the first cavity 31.

[0160] Optionally, the actuator further includes a second guiding member. The second guiding member and the second seal are arranged at intervals along the axial direction of the actuator. The fixing bracket 21 and the central shaft 11 are slidably connected through the second guiding member, which improves the reliability of the relative movement between the fixing bracket 21 and the central shaft 11. The second guiding member can be a sliding bearing, which can also reduce the sliding friction between the fixing bracket 21 and the central shaft 11, and improve the structural stability and service life of the actuator.

[0161] Specifically, the shape and material of the second seal can be set with reference to the first seal, and the shape and material of the second guiding member can be set with reference to the first guiding member. This embodiment will not be elaborated herein.

[0162] Specifically, the second seal and the second guiding member can be combined into a second guiding and sealing assembly 62. The second seal is respectively in contact with the fixing bracket 21 and the central shaft 11. The second guiding member is respectively connected to the fixing bracket 21 and the central shaft 11.

[0163] Optionally, the first component 1 includes a support arm 23 adapted to connect to a wheel; one end of the support arm 23 is fixedly connected to one end of the fixing bracket 21 away from the central axis 11, and the other end of the support arm 23 passes through the bottom of the housing 12.

[0164] In the present utility model, the coupling effect between the first magnetic member 13 and the second magnetic member 22 can drive the movement of the fixing bracket 21, the fixing bracket 21 can drive the movement of the support arm 23, and further drive the movement of the wheel, facilitating the active elimination of road surface excitation; the road surface excitation can also be transmitted to the support arm 23 through the wheel, and then transmitted to the fixing bracket 21 for passive elimination.

[0165] Specifically, the fixing bracket 21 and the support arm 23 can be fixedly connected by means such as welding or threaded connection. Specifically, both the fixing bracket 21 and the support arm 23 can be of a rotary body structure. The interior of the fixing bracket 21 is hollow. One end of the fixing bracket 21 is sleeved outside the central axis 11, and the other end can be connected to the support arm 23 and blocked by the support arm 23. Specifically, the support arm 23 can have a limiting groove to embed one end of the fixing bracket 21 away from the central axis 11 into the limiting groove, improving the reliability of fixing the fixing bracket 21.

[0166] Specifically, one end of the fixing bracket 21 away from the support arm 23 can have a first flange, the support arm 23 can have a second flange opposite to the first flange, and the first flange, the second flange and the outer wall of the fixing bracket 21 can enclose a receiving space, and the second magnetic member 22 can be arranged in the receiving space.

[0167] Optionally, in combination Figure 3 and Figure 15 As shown, the support arm 23 is provided with a connection channel 231 adapted to communicate the compression channel 111 and the second cavity 32, realizing the inflow of the pressure medium from the compression channel 111 into the second cavity 32.

[0168] Or the connection channel 231 is adapted to communicate the stretching channel 112 and the second cavity 32, realizing the inflow of the pressure medium from the second cavity 32 into the stretching channel 112, facilitating the generation of damping during the flow of the pressure medium.

[0169] Optionally, the actuator further includes a third seal. One end of the support arm 23 close to the fixing bracket 21 is hermetically connected to the housing 12 through the third seal, which can prevent the leakage of the pressure medium and improve the tightness of the second cavity 32.

[0170] Optionally, the actuator further includes a third guiding member, and the third guiding member and the third sealing member are arranged at intervals along the axial direction of the actuator; one end of the support arm 23 close to the fixing frame 21 is slidably connected to the housing 12 through the third guiding member, improving the reliability of the relative movement between the support arm 23 and the housing 12. The third guiding member can be a sliding bearing, and can also reduce the sliding friction between the support arm 23 and the housing 12, improving the structural stability and service life of the actuator.

[0171] Specifically, the shape and material of the third sealing member can be set with reference to the first sealing member, and the shape and material of the third guiding member can be set with reference to the first guiding member, which will not be elaborated in this embodiment.

[0172] Specifically, the third sealing member and the third guiding member can be combined into a third guiding and sealing assembly 63. The third sealing member abuts against the support arm 23 and the housing 12 respectively, the third guiding member is connected to the support arm 23 and the housing 12 respectively, and the third guiding member is arranged on the side of the third sealing member facing the second cavity 32.

[0173] Specifically, the first convex edge and the housing 12 can be sealed through the first guiding and sealing assembly 61, and the second convex edge and the housing 12 can be connected through the third guiding and sealing assembly 63.

[0174] Further, the second convex edge can be connected to the first magnetic member 13 through the third guiding and sealing assembly 63, so that the second magnetic member 22 and the first magnetic member 13 are always opposite to each other.

[0175] Optionally, the actuator further includes a fourth sealing member 641, and the support arm 23 and the bottom of the housing 12 are hermetically connected through the fourth sealing member 641. It can prevent the pressure medium from leaking and improve the

[0176] tightness of the second cavity 32.

[0177] Optionally, the actuator further includes a fourth guiding member 642, and the fourth guiding member 642 and the fourth sealing member 641 are arranged at intervals along the axial direction of the actuator; the support arm 23 and the bottom of the housing 12 are slidably connected through the fourth guiding member 642, which can improve the reliability of the relative movement between the support arm 23 and the bottom of the housing 12. The fourth guiding member 642 can be a sliding bearing, and can also reduce the sliding friction between the support arm 23 and the bottom of the housing 12, improving the structural stability and service life of the actuator.

[0178] Specifically, the shape and material of the fourth sealing member 641 can be set with reference to the first sealing member, and the shape and material of the fourth guiding member 642 can be set with reference to the first guiding member, which will not be elaborated in this embodiment.

[0179] Specifically, the fourth seal 641 and the fourth guide 642 can be combined into a fourth guide seal assembly 64. The fourth seal 641 is in contact with the support arm 23 and the housing 12 respectively, the fourth guide 642 is connected to the support arm 23 and the housing 12 respectively, and the fourth guide 642 is disposed on the side of the fourth seal 641 facing the second cavity 32.

[0180] Specifically, under the action of the first guide seal assembly 61, the second guide seal assembly 62, the third guide seal assembly 63 and the fourth guide seal assembly 64, the fixing frame 21 and the support arm 23 can be guided to ensure the stiffness of the suspension, and the pressure medium in the actuator can be sealed. Among them, the fixing frame 21 and the support arm 23 can be combined to act as the moving piston of the damper, and can also play a guiding role to maintain the stiffness of the actuator.

[0181] Optionally, the actuator further includes a second elastic member 7 disposed in the housing 12; the second elastic member 7 is sleeved outside the central shaft 11, and both ends of the second elastic member 7 are in contact with the fixing frame 21 and the housing 12 respectively.

[0182] In the embodiment of the present utility model, both ends of the second elastic member 7 are connected to the fixing frame 21 and the housing 12 respectively, and can be adapted to support the vehicle body weight and reduce the thrust load of the actuator.

[0183] Specifically, the second elastic member 7 can be a spring or a spring sheet, etc. Figure 3 For example, only one case where the second elastic member 7 is a spring and is sleeved outside the central shaft 11 is shown. In other cases, the second elastic member 7 can also include a plurality of springs, and the plurality of springs are arranged circumferentially around the central shaft 11. The embodiment of the present utility model does not limit the specific arrangement manner of the second elastic member 7.

[0184] Specifically, one end of the second elastic member 7 can be in contact with or fixedly connected to the fixing frame 21, and the other end can be in contact with or fixedly connected to the housing 12.

[0185] The actuator described in the embodiment of the present utility model has at least the following advantages:

[0186] In the embodiment of the present utility model, the first component and the second component can move relative to each other along the axial direction of the actuator, and a first cavity and a second cavity are formed between the first component and the second component. When the actuator is in the compressed state, the compression channel can communicate the first cavity and the second cavity, so that the pressure medium can flow from the first cavity into the second cavity to generate a damping force; when the actuator is in the stretched state, the stretching channel can communicate the second cavity and the first cavity, so that the pressure medium can flow from the second cavity into the first cavity to generate a damping force. Since both the compression channel and the stretching channel are arranged within the central axis, there is no need to occupy the installation space of the actuator, which is beneficial to reducing the size of the actuator, simplifying the structure of the actuator, and reducing the cost of the actuator.

[0187] In a second aspect, the embodiment of the present utility model also discloses a suspension system, including the above-mentioned actuator.

[0188] The suspension system described in the embodiment of the present utility model can achieve the same beneficial effects as the above-mentioned actuator, and will not be elaborated herein.

[0189] In a third aspect, the embodiment of the present utility model also discloses a vehicle, including the above-mentioned actuator or the above-mentioned suspension system.

[0190] The vehicle described in the embodiment of the present utility model includes, but is not limited to, automobiles, trucks, buses, etc.

[0191] The vehicle described in the embodiment of the present utility model has the same beneficial effects as the above-mentioned actuator or suspension system, and will not be elaborated herein.

[0192] Although the preferred embodiments of the embodiment of the present utility model have been described, those skilled in the art can make additional changes and modifications to these embodiments once they know the basic creative concept. Therefore, the appended claims are intended to be construed as including the preferred embodiments and all changes and modifications falling within the scope of the embodiment of the present utility model.

[0193] Finally, it should also be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or terminal device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or terminal device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or terminal device comprising the said element.

[0194] The above has introduced in detail an actuator, a suspension system and a vehicle provided by the present utility model. Specific examples are used in this text to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only suitable for helping to understand the method and its core idea of the present utility model; at the same time, for those of ordinary skill in the art, according to the idea of the present utility model, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present utility model.

Claims

1. An actuator, characterized in that: include: A first component (1) and a second component (2) capable of relative movement along the axial direction of the actuator, wherein a first cavity (31) and a second cavity (32) are formed between the first component (1) and the second component (2); The first component (1) comprises a central shaft (11), wherein a compression channel (111) and a stretching channel (112) are arranged in the central shaft (11); The compression channel (111) is suitable for achieving communication between the first cavity (31) and the second cavity (32) when the actuator is in a compressed state, and the stretching channel (112) is suitable for achieving communication between the second cavity (32) and the first cavity (31) when the actuator is in a stretched state.

2. The actuator according to claim 1, characterized in that: The actuator further comprises a valve member (5), wherein the valve member (5) is adapted to control the compression channel (111) to be opened and the tension channel (112) to be closed when the actuator is in a compressed state; and the valve member (5) is adapted to control the tension channel (112) to be opened and the compression channel (111) to be closed when the actuator is in a tension state.

3. The actuator according to claim 2, characterized in that: The valve member (5) is arranged in the central shaft (11) and is respectively connected to the compression channel (111) and the stretching channel (112).

4. The actuator according to claim 2, characterized in that: The compression passage (111) comprises a first oil inlet passage (1111) and a first oil outlet passage (1112), the first oil inlet passage (1111) being in communication with the first cavity (31), and the first oil outlet passage (1112) being in communication with the second cavity (32); The valve member (5) is arranged between the first oil inlet channel (1111) and the first oil outlet channel (1112), and is suitable for opening or closing the path from the first oil inlet channel (1111) to the first oil outlet channel (1112).

5. The actuator according to claim 4, characterized in that: The stretching channel (112) comprises a second oil inlet channel (1121) and a second oil outlet channel (1122), the second oil inlet channel (1121) is in communication with the second cavity (32), and the second oil outlet channel (1122) is in communication with the first cavity (31); The valve member (5) is arranged between the second oil inlet channel (1121) and the second oil outlet channel (1122), and is suitable for opening or closing the path from the second oil inlet channel (1121) to the second oil outlet channel (1122).

6. The actuator according to claim 5, characterized in that: An end of the second oil outlet channel (1122) away from the valve member (5) is connected to the first oil inlet channel (1111); An end of the first oil outlet channel (1112) away from the valve member (5) is connected to the second oil inlet channel (1121).

7. The actuator according to claim 2, characterized in that: The valve member (5) comprises a slide valve (51) and / or a one-way valve.

8. The actuator according to claim 7, characterized in that: The valve member (5) comprises two slide valves (51), the two slide valves are respectively a first slide valve (52) and a second slide valve (53); the central shaft (11) comprises a first shaft section (113) and a second shaft section (114); the first shaft section (113) and the second shaft section (114) are both provided with at least a portion of the compression channel (111) and the stretching channel (112); Along the axial direction of the actuator, the first shaft section (113), the first sliding valve (52), the second sliding valve (53) and the second shaft section (114) are connected in sequence; when the actuator is in a compressed state, the first sliding valve (52) is suitable for opening the compression channel (111), and the second sliding valve (53) is suitable for closing the stretching channel (112); when the actuator is in a stretched state, the second sliding valve (53) is suitable for opening the stretching channel (112), and the first sliding valve (52) is suitable for closing the compression channel (111).

9. The actuator according to claim 8, characterized in that The slide valve (51) comprises a flow valve plate (511) and a first flow channel (512) and a second flow channel (513) arranged at an interval, the first flow channel (512) and the second flow channel (513) are connected, and the second flow channel (513) of the first slide valve (52) is connected to the second flow channel (513) of the second slide valve (53); When the actuator is in a compressed state, the first flow channel (512) of the first slide valve (52) is communicated with the compression channel (111) in the first shaft section (113) through the flow valve plate (511), and the second flow channel (513) of the second slide valve (53) is communicated with the compression channel (111) in the second shaft section (114); When the actuator is in the stretched state, the first flow channel (512) of the second sliding valve (53) is connected to the stretching channel (112) in the second shaft section (114) through the flow valve plate (511), and the second flow channel (513) of the first sliding valve (52) is connected to the stretching channel (112) in the first shaft section (113).

10. The actuator according to claim 9, characterized in that: The sliding valve (51) further includes a first elastic member (514); The first elastic member (514) is disposed in the first flow channel (512) and is connected to the flow valve plate (511).

11. The actuator according to claim 9, characterized in that: The second flow channel (513) includes a first sub-flow channel (5131) and a second sub-flow channel (5132); The first sub-flow channel (5131) of the first sliding valve (52) is in communication with the first flow channel (512) thereof, and is also in communication with the second sub-flow channel (5132) of the second sliding valve (53); the first sub-flow channel (5131) of the second sliding valve (53) is in communication with the first flow channel (512) thereof, and is also in communication with the second sub-flow channel (5132) of the first sliding valve (52); When the actuator is in a compressed state, the second sub-channel (5132) of the second slide valve (53) is in communication with the compression channel (111) in the second shaft section (114); When the actuator is in the stretched state, the second sub-channel (5132) of the first sliding valve (52) is connected to the stretching channel (112) in the first shaft section (113).

12. The actuator according to claim 11, characterized in that: The sliding valve (51) comprises a first enclosed plate (516) and a second enclosed plate (517), wherein the first enclosed plate (516) is sleeved outside the second enclosed plate (517) and connected to the second enclosed plate (517); The inner wall of the second enclosing plate (517) encloses the first flow channel (512), and the outer wall of the second enclosing plate (517) and the inner wall of the first enclosing plate (516) enclose the second flow channel (513).

13. The actuator according to claim 12, characterized in that: The second enclosing plate (517) is provided with a first flow guide hole (5171), and the first flow channel (512) and the second flow channel (513) are connected through the first flow guide hole (5171).

14. The actuator according to claim 12, characterized in that: The sliding valve (51) comprises two first partitions (518), wherein the first partitions (518) are arranged in the first flow channel (512), one side of the first partition (518) is connected to the first enclosing plate (516), and the other side of the first partition (518) is connected to the second enclosing plate (517); The two first partitions (518) are arranged at intervals along the circumference of the actuator to divide the second flow channel (513) into the first sub-flow channel (5131) and the second sub-flow channel (5132).

15. The actuator according to claim 14, characterized in that The valve member (5) further comprises a second partition plate (54), one side of the second partition plate (54) being respectively connected to the first enclosed plate (516) and the second enclosed plate (517) of the first sliding valve (52), and the other side of the second partition plate (54) being respectively connected to the first enclosed plate (516) and the second enclosed plate (517) of the second sliding valve (53); The second partition plate (54) is provided with a second flow guide hole (541) and a third flow guide hole (542); the second flow guide hole (541) is respectively connected to the first sub-channel (5131) of the first sliding valve (52) and the second sub-channel (5132) of the second sliding valve (53); the third flow guide hole (542) is respectively connected to the first sub-channel (5131) of the second sliding valve (53) and the second sub-channel (5132) of the first sliding valve (52).

16. The actuator according to claim 1, characterized in that The first cavity (31) and the second cavity (32) are both filled with pressure medium.

17. The actuator according to claim 1, characterized in that The first component (1) comprises a shell (12) and a first magnetic component (13) arranged on the shell (12); the second component (2) comprises a fixing frame (21) and a second magnetic component (22) arranged on the fixing frame (21); the second magnetic component (22) is arranged opposite to the first magnetic component (13).

18. The actuator according to claim 17, characterized in that The fixing frame (21) is arranged in the shell (12), one end of the central axis (11) is connected to the shell (12), and the other end of the central axis (11) is embedded in the fixing frame (21); One end of the fixing frame (21) close to the central axis (11) and the shell (12) are enclosed to form the first cavity (31), and one end of the fixing frame (21) away from the central axis (11) and the shell (12) are enclosed to form the second cavity (32), and a portion of the central axis (11) is arranged in the first cavity (31).

19. The actuator according to claim 18, characterized in that The actuator comprises a first sealing member, and one end of the fixing frame (21) close to the central axis (11) is sealedly connected to the housing (12) via the first sealing member.

20. The actuator according to claim 19, characterized in that The actuator further comprises a first guide member, wherein the first guide member and the first seal member are spaced apart from each other along the axial direction of the actuator; One end of the fixing frame (21) close to the central axis (11) is slidably connected to the housing (12) via the first guide member.

21. The actuator according to claim 18, characterized in that The actuator further comprises a second sealing member, and the fixing frame (21) and the central shaft (11) are sealedly connected via the second sealing member.

22. The actuator according to claim 21, characterized in that The actuator further comprises a second guide member, wherein the second guide member and the second seal member are spaced apart along the axial direction of the actuator; The fixing frame (21) and the central shaft (11) are slidably connected via the second guide member.

23. The actuator according to claim 18, characterized in that The first component (1) comprises a support arm (23), wherein the support arm (23) is suitable for connecting to a wheel; One end of the support arm (23) is fixedly connected to an end of the fixing frame (21) away from the central axis (11), and the other end of the support arm (23) passes through the bottom of the shell (12).

24. The actuator according to claim 23, characterized in that The support arm (23) is provided with a connecting channel (231), and the connecting channel (231) is suitable for connecting the compression channel (111) and the second cavity (32), or the connecting channel (231) is suitable for connecting the stretching channel (112) and the second cavity (32).

25. The actuator according to claim 23, characterized in that The actuator further comprises a third sealing member, and one end of the support arm (23) close to the fixing frame (21) is sealedly connected to the housing (12) via the third sealing member.

26. The actuator according to claim 25, characterized in that The actuator further comprises a third guide member, wherein the third guide member and the third seal member are spaced apart along the axial direction of the actuator; One end of the support arm (23) close to the fixing frame (21) is slidably connected to the housing (12) via the third guide member.

27. The actuator according to claim 23, characterized in that The actuator further comprises a fourth sealing member, and the support arm (23) is sealingly connected to the bottom of the housing (12) via the fourth sealing member.

28. The actuator according to claim 27, characterized in that The actuator further comprises a fourth guide member, wherein the fourth guide member and the fourth seal member are spaced apart along the axial direction of the actuator; The support arm (23) is slidably connected to the bottom of the housing (12) via the fourth guide member.

29. The actuator according to claim 18, characterized in that The actuator further comprises a second elastic member (7) arranged in the housing (12); The second elastic member (7) is sleeved outside the central shaft (11), and two ends of the second elastic member (7) are respectively in contact with the fixing frame (21) and the housing (12).

30. The actuator according to any one of claims 1 to 22, characterized in that: The first component (1) is a stator component, the second component (2) is a mover component, the first component (1) is suitable for connecting to a vehicle frame, and the second component (2) is suitable for connecting to a wheel.

31. A suspension system, characterized in that: An actuator comprising any one of claims 1-30.

32. A vehicle, characterized in that: Comprising the actuator according to any one of claims 1 to 30 or the suspension system according to claim 31.

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