Actuator, suspension system and vehicle

Abstract

The embodiment of the invention 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, the first assembly comprises a central shaft, and a damping cavity is formed in the central shaft; the damper comprises a piston rod and a piston valve which are connected, the piston rod is connected with the second assembly, the piston valve is arranged in the damping cavity in a sliding mode, and the piston valve divides the damping cavity into a first cavity body and a second cavity body. Therefore, more installation space can be saved for the actuator, and the actuator is simpler in structure and lower in cost.

Description

Technical Field

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

[0002] With the advancement of vehicle technology, passenger demands for ride comfort continue to increase. To improve actuator efficiency, simplify structure, and enhance installation convenience, linear motors are increasingly being used as actuators. To ensure stable and comfortable handling, dampers are often also incorporated into the actuators.

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

[0004] In view of the above problems, embodiments of the present invention 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] In order to solve the above problems, in a first aspect, an embodiment of the present invention discloses an actuator, comprising:

[0006] A first component and a second component capable of relative movement along the axial direction of the actuator, wherein the first component includes a central shaft with a damping chamber formed therein;

[0007] The damper includes a piston rod and a piston valve connected to each other, the piston rod is connected to the second component, the piston valve is slidably arranged in the damping chamber, and the piston valve separates the damping chamber into a first cavity and a second cavity.

[0008] Optionally, the second component has a guide groove arranged along the axial direction of the actuator, and at least a portion of the central axis is embedded in the guide groove;

[0009] One end of the piston rod extends into the damping chamber, and the other end is connected to the guide groove.

[0010] Optionally, a pressure chamber is further provided in the central shaft, and the damper further includes a movable part;

[0011] The movable member is slidably disposed in the central shaft, and the movable member divides the inner cavity of the central shaft into the damping cavity and the pressure cavity.

[0012] Optionally, the first cavity is provided between the second cavity and the pressure cavity, and the pressure medium in the pressure cavity is gas;

[0013] The pressure medium in the first cavity and the second cavity is hydraulic oil.

[0014] Optionally, a first sealing member is provided between the movable member and the inner wall of the central shaft, and the first sealing member is suitable for isolating the pressure chamber and the first cavity.

[0015] Optionally, the piston valve includes a piston, a damping hole is provided on the piston, and the damping hole is suitable for connecting the first cavity and the second cavity.

[0016] Optionally, a valve plate is provided in the damping hole, and the valve plate is suitable for adjusting the flow rate of the pressure medium.

[0017] Optionally, the piston valve further includes a solenoid valve;

[0018] The solenoid valve is connected to the piston and is suitable for adjusting the flow rate of the pressure medium.

[0019] Optionally, the solenoid valve is disposed in the second cavity, and a first buffer pad is connected to a side of the solenoid valve away from the piston.

[0020] Optionally, the damper further includes a solenoid valve;

[0021] The solenoid valve is disposed in the pressure chamber and is connected to the first cavity and / or the second cavity through a pipeline.

[0022] Optionally, the first component includes a second seal and a third seal, one end of the central shaft is sealedly connected to the second seal, and the other end is sealedly connected to the third seal, and the inner cavity of the central shaft, the second seal and the third seal enclose a closed cavity;

[0023] The piston rod passes through the second sealing member and is slidably connected to the second sealing member.

[0024] Optionally, the second sealing member and the piston rod are connected via a sliding bearing.

[0025] Optionally, the actuator further comprises an end cover;

[0026] The end cover is arranged on a side of the second sealing member away from the third sealing member, and the end cover is connected to the end of the central shaft;

[0027] The end cover is provided with a through hole suitable for passing the piston rod.

[0028] 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;

[0029] The second magnetic member is arranged opposite to the first magnetic member;

[0030] One end of the central shaft is fixedly connected to the shell, and the other end is embedded in the fixing frame.

[0031] Optionally, the second assembly comprises a support arm, the support arm being adapted to be connected to a wheel;

[0032] One end of the support arm is fixedly connected to an end of the fixing frame away from the central axis;

[0033] The other end of the support arm passes through the bottom of the shell.

[0034] Optionally, the fixing frame is provided with a guide channel which is axially conductive to the actuator;

[0035] The support arm blocks one end of the guide channel away from the central axis and forms a guide groove with an opening toward the central axis together with the guide channel;

[0036] One end of the central axis away from the housing is embedded in the guide groove.

[0037] Optionally, one end of the piston rod extends into the damping chamber, and the other end is arranged in the guide groove and connected to the support arm.

[0038] Optionally, a second buffer pad is provided on a side of the support arm facing the central axis;

[0039] The second buffer pad is arranged opposite to the end of the central axis away from the housing along the axial direction of the actuator.

[0040] Optionally, the actuator further comprises an elastic member disposed in the housing;

[0041] The elastic member is sleeved outside the central axis, and two ends of the elastic member are respectively in contact with the fixing frame and the shell.

[0042] Optionally, the first component is a stator component, the second component is a mover component, the first component is suitable for connecting to a vehicle frame, and the second component is suitable for connecting to a wheel.

[0043] In a second aspect, an embodiment of the present invention further discloses a suspension system, comprising the above-mentioned actuator.

[0044] In a third aspect, an embodiment of the present invention further discloses a vehicle, comprising the above-mentioned actuator or the above-mentioned suspension system.

[0045] The embodiments of the present invention include the following advantages:

[0046] In an embodiment of the present invention, the piston rod of the damper is connected to the second component, and the piston valve of the damper is slidably disposed within the damping chamber. Thus, when the first component and the second component move relative to each other along the axial direction of the actuator, the piston rod can drive the piston valve to slide within the damping chamber, thereby driving the volume change of the first cavity and the second cavity. The first cavity and the second cavity can exchange pressure medium, so that the damper generates a damping force. Since the damping chamber is disposed within the central axis, part of the structure of the damper can be disposed within the central axis, which can save more installation space for the actuator and make the structure of the actuator simpler and the cost lower. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 It is a structural schematic diagram of an actuator of the present invention;

[0048] Figure 2 It is a schematic cross-sectional structure diagram of an actuator of the present invention;

[0049] Figure 3 It is an enlarged partial cross-sectional view of an actuator of the present invention;

[0050] Figure 4 is an enlarged partial cross-sectional view of another actuator of the present invention;

[0051] Figure 5 This is a schematic diagram of the combined structure of a shell and a central shaft of the present invention;

[0052] Figure 6 is a cross-sectional view of a combination of a housing and a central shaft of the present invention;

[0053] Figure 7 This is a schematic diagram of the combined structure of a support arm and a piston rod of the present invention;

[0054] Figure 8 It is a cross-sectional view of a combination of a support arm and a piston rod of the present invention.

[0055] Description of reference numerals:

[0056] 1. First component; 11. Shell; 111. Upper shell; 1111. Tower top thread; 1112. Mounting groove; 112. Lower end cover; 12. Center axis; 121. Pressure chamber; 122. Damping chamber; 1221. First cavity; 1222. Second cavity; 13. First magnetic part; 2. Second component; 21. Guide groove; 22. Fixing frame; 23. Support arm; 231. Limiting groove; 24. Second magnetic part; 3. Elastic part; 4. Damper; 41. Piston rod; 42. Piston valve; 43. Movable part; 51. Second sealing part; 52. Third sealing part; 53. End cover; 61. First buffer pad; 62. Second buffer pad; 7. Solenoid valve; 81. Sliding bearing; 82. Sealing ring. DETAILED DESCRIPTION

[0057] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0058] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly refer to one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more. Furthermore, the term "and / or" in the specification and claims refers to at least one of the connected entities, and the character " / " generally indicates an "or" relationship between the connected entities.

[0059] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 understood as limiting the present invention.

[0060] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0061] One of the core concepts of the embodiment of the present invention is to disclose an actuator, combined with Figure 1 and Figure 2 As shown, it includes: a first component 1 and a second component 2 that can move relative to each other along the axial direction of the actuator, the first component 1 includes a central shaft 12, and a damping chamber 122 is formed in the central shaft 12; the damper 4 includes a connected piston rod 41 and a piston valve 42, the piston rod 41 is connected to the second component 2, and the piston valve 42 is slidably arranged in the damping chamber 122, and the piston valve 42 separates the damping chamber 122 into a first cavity 1221 and a second cavity 1222.

[0062] In an embodiment of the present invention, the piston rod 41 of the damper 4 is connected to the second component 2, and the piston valve 42 of the damper 4 is slidably disposed in the damping chamber 122. In this way, when the first component 1 and the second component 2 move relative to each other along the axial direction of the actuator, the piston rod 41 can drive the piston valve 42 to slide in the damping chamber 122, thereby driving the volume change of the first cavity 1221 and the second cavity 1222. The pressure medium can be exchanged between the first cavity 1221 and the second cavity 1222, so that the damper 4 generates a damping force. Since the damping chamber 122 is disposed in the central shaft 12, part of the structure of the damper 4 can be disposed in the central shaft 12, which can save more installation space for the actuator and make the structure of the actuator simpler and the cost lower.

[0063] In an embodiment of the present invention, the first component 1 and the second component 2 can move relative to each other along the axial direction of the actuator, wherein 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 a mover component, and the corresponding second component 2 can be a 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 a stator component, and the corresponding second component 2 can be a mover component. The center shaft 12 can be part of the stator component or part of the mover component. It can be specifically designed according to actual needs, and the embodiment of the invention does not specifically limit this.

[0064] Specifically, the first component 1 includes a central shaft 12, within which a damping chamber 122 is formed. The central shaft 12 can serve as the cylinder of the damper 4. The damper 4 includes a connected piston rod 41 and a piston valve 42. The piston valve 42 is slidably disposed within the damping chamber 122. Because the piston rod 41 is connected to the second component 2, when the first component 1 and the second component 2 move relative to each other along the axial direction of the actuator, the piston rod 41 can drive the piston valve 42 to move within the damping chamber 122.

[0065] Furthermore, the piston valve 42 separates the damping chamber 122 into a first chamber 1221 and a second chamber 1222. When the piston valve 42 slides within the damping chamber 122, the volumes of the first chamber 1221 and the second chamber 1222 change. For example, the volume of the first chamber 1221 increases, while the volume of the second chamber 1222 decreases accordingly. In this case, the pressure within the second chamber 1222 can be greater than the pressure within the first chamber 1221, allowing the pressure medium to flow from the second chamber 1222 to the first chamber 1221. Alternatively, the volume of the first chamber 1221 decreases, while the volume of the second chamber 1222 increases accordingly. In this case, the pressure within the first chamber 1221 can be greater than the pressure within the second chamber 1222, allowing the pressure medium to flow from the first chamber 1221 to the second chamber 1222. The pressure medium generates a damping force during its flow, which is suitable for reducing or even eliminating road excitation, thereby improving the smoothness and comfort of vehicle driving.

[0066] Specifically, the actuator can include a compression state and a tension state. In the compression state, the actuator Figure 3 As shown, the first component 1 moves downward, or the second component 2 moves upward, and the piston valve 42 squeezes the first cavity 1221, so that the pressure medium in the first cavity 1221 can flow to the second cavity 1222; when the actuator is in the stretched state, as shown Figure 3 As shown, the first component 1 moves upward, or the second component 2 moves downward, and the piston valve 42 squeezes the second cavity 1222 so that the pressure medium in the second cavity 1222 can flow to the first cavity 1221 .

[0067] Specifically, the first component 1 and the second component 2 move relative to each other along the axis of the actuator, that is, the main movement of the first component 1 or the second component 2 is an up-and-down linear movement, so that the stiffness and height of the actuator can be adjusted according to the road conditions. In an embodiment of the present invention, the actuator can be integrated with a damper 4, which not only integrates guidance and the provision of adjustable damping force into one, making the structure more compact and saving more space, but also reduces the complexity of the structure, which is conducive to reducing costs; the stiffness and damping of the actuator can be actively adjusted to ensure the comfort and controllability of the vehicle. Specifically, during the driving process of the vehicle, the damper 4 can absorb road excitation and buffer the impact transmitted by the road surface, which is convenient for increasing the service life of the actuator, improving the vehicle's passability, vehicle operational stability, and driving smoothness and comfort.

[0068] Specifically, the actuator, when used in a vehicle, can not only raise and lower the vehicle body but also actively adjust the damping force according to the road surface to eliminate road excitation. Furthermore, the actuator has a compact structure, and through integration, it reduces parts, overall complexity, and costs, making it more accessible to the public.

[0069] Specifically, part of the structure of the damper 4 can be arranged in the central shaft 12 without occupying additional space, which is beneficial to saving more installation space for the actuator and making the structure of the actuator simpler and the cost lower.

[0070] In some specific embodiments, the first component 1 is a stator component, and 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. In this way, on the one hand, the second component 2 can drive the wheel to move to actively eliminate road excitation. On the other hand, the road excitation is transmitted to the second component 2 via the wheel, causing the second component 2 to move relative to the first component 1. The piston valve 42 slides within the damping chamber 122, causing the volume of the first cavity 1221 and the second cavity 1222 to change. The pressure medium flows between the first cavity 1221 and the second cavity 1222, which can generate damping to passively eliminate road excitation, thereby improving the vehicle's operational stability, driving smoothness, and comfort. In the embodiments of the present invention, only the first component 1 is a stator component and the second component 2 is a mover component for specific description. When the first component 1 is a mover component and the second component 2 is a stator component, the same settings can be used for reference.

[0071] Specifically, when the actuator is used in a vehicle, the second component 2 can be connected to the wheel, and the actuator can have an active control mode and a passive control mode. In the active control mode, the second component 2 moves back and forth linearly along the axial direction of the actuator, so that the second component 2 can drive the wheel to move, and can actively eliminate road excitation to actively adjust the stiffness of the actuator; in the passive control mode, the road excitation is transmitted to the second component 2 through the wheel, so that the second component 2 transmits the road excitation to the damper 4, thereby passively eliminating the road excitation.

[0072] Optionally, the second component 2 has a guide groove 21 arranged along the axial direction of the actuator, and at least part of the central axis 12 is embedded in the guide groove 21; one end of the piston rod 41 extends into the damping chamber 122, and the other end is connected to the guide groove 21.

[0073] In an embodiment of the present invention, at least a portion of the central shaft 12 is embedded in the guide groove 21, so that the guide groove 21 can guide the central shaft 12 along the axial direction of the actuator, thereby improving the reliability of the relative movement of the first component 1 and the second component 2 along the axial direction of the actuator.

[0074] Specifically, one end of the piston rod 41 extends into the damping chamber 122 to facilitate connection with the piston valve 42, and the other end is connected to the guide groove 21 to facilitate connection with the second component 2, so that when the first component 1 and the second component 2 move relative to each other along the axial direction of the actuator, the piston valve 42 can be driven by the piston rod 41 to slide in the damping chamber 122.

[0075] Optionally, a pressure chamber 121 is further provided in the central shaft 12 , and the damper 4 further includes a movable member 43 ; the movable member 43 is slidably provided in the central shaft 12 , and the movable member 43 divides the inner cavity of the central shaft 12 into a damping chamber 122 and a pressure chamber 121 .

[0076] In an embodiment of the present invention, the movable part 43 is arranged between the damping chamber 122 and the pressure chamber 121. The volume change of the damping chamber 122 can drive the change of the pressure chamber 121. The pressure chamber 121 can cooperate with the damping chamber 122 to prevent the cylinder from exploding. Moreover, the pressure chamber 121 can also provide thrust to help the pressure chamber 121 reset.

[0077] Specifically, the movable part 43 is arranged in the central shaft 12 and acts as a piston. The movement of the movable part 43 can adjust the volume of the pressure chamber 121 and the damping chamber 122. For example, when the volume of the damping chamber 122 decreases, the volume of the corresponding pressure chamber 121 increases; when the volume of the damping chamber 122 increases, the volume of the corresponding pressure chamber 121 decreases.

[0078] Specifically, the pressure chamber 121, the first cavity 1221 and the second cavity 1222 all contain a medium. The medium in the pressure chamber 121, the first cavity 1221 and the second cavity 1222 can be the same or different, and the medium can be hydraulic oil, gas or phosphate ester, etc.

[0079] Optionally, the first cavity 1221 is disposed between the second cavity 1222 and the pressure cavity 121 , and the pressure medium in the pressure cavity 121 is gas; the pressure medium in the first cavity 1221 and the second cavity 1222 is hydraulic oil.

[0080] In this embodiment of the present invention, hydraulic oil can flow between the first cavity 1221 and the second cavity 1222, generating a damping force during the flow process to dissipate road surface excitation. Because the pressure medium in the pressure chamber 121 is gas, the pressure chamber 121 can be compressed to make room for the damping chamber 122. The high-pressure gas in the pressure chamber 121 also provides a restoring force for the hydraulic oil to return to the original state.

[0081] Specifically, as shown in the figure, when the actuator is in the compressed state, the damper 4 can enter the compression process, the first cavity 1221 is compressed, and the hydraulic oil can enter the second cavity 1222 from the first cavity 1221 and generate a damping force to eliminate road excitation; at the same time, the pressure cavity 121 is compressed to provide a holding volume for the excess hydraulic oil in the first cavity 1221.

[0082] Specifically, the high-pressure gas in the pressure chamber 121 can also provide a restoring force, causing the damper 4 to enter a rebound stroke, that is, enter the stretched state of the actuator. The hydraulic oil can flow back from the second cavity 1222 to the first cavity 1221 and generate a damping force to eliminate road excitation.

[0083] Optionally, a first seal is provided between the movable part 43 and the inner wall of the central shaft 12. The first seal is suitable for isolating the pressure chamber 121 and the first cavity 1221, and can prevent the hydraulic oil in the first cavity 1221 from flowing into the pressure chamber 121, thereby ensuring that high pressure is generated in the pressure chamber 121, so as to facilitate the subsequent high-pressure gas in the pressure chamber 121 to provide restoring force.

[0084] Specifically, the first sealing member may be a sealing ring 82, a sealing gasket, etc. The sealing ring 82 may be an O-type, U-type, or Sterling seal, etc.

[0085] Optionally, the piston valve 42 includes a piston, and a damping hole is provided on the piston, and the damping hole is suitable for conducting the first cavity 1221 and the second cavity 1222.

[0086] In the embodiment of the present invention, when the hydraulic oil passes through the damping hole, it can better generate damping force and eliminate more road excitation.

[0087] Optionally, a valve plate is provided in the damping hole, and the valve plate is suitable for adjusting the flow rate of the pressure medium.

[0088] In the embodiment of the present invention, the opening and closing degree of the valve plate can be adjusted, thereby facilitating adjustment of the damping force when the hydraulic oil passes through the piston.

[0089] Optionally, the piston valve 42 further includes a solenoid valve 7 ; the solenoid valve 7 is connected to the piston and is suitable for adjusting the flow rate of the pressure medium.

[0090] In this embodiment of the present invention, the flow rate of the hydraulic oil between the first cavity 1221 and the second cavity 1222 is controlled by the solenoid valve 7, thereby facilitating adjustment of the damping force. Furthermore, the control of the solenoid valve 7 facilitates the passage from the second cavity 1222 to the first cavity 1221, or vice versa.

[0091] Specifically, combined Figures 2 to 4 As shown, when the actuator is in the compression state, the solenoid valve 7 only conducts the path from the first cavity 1221 to the second cavity 1222, and the pressure medium flows from the first cavity 1221 to the second cavity 1222, and flows in one direction; when the actuator is in the tension state, the solenoid valve 7 only conducts the path from the second cavity 1222 to the first cavity 1221, and the pressure medium flows from the second cavity 1222 back to the first cavity 1221, and flows in one direction, so as to improve the damping effect.

[0092] Specifically, the solenoid valve 7 and the piston may be fixedly connected by a nut, or may be fixedly connected by bonding, etc.

[0093] Specifically, the solenoid valve 7 has a damping hole and an electromagnet. When powered, the opening and closing degree of the solenoid valve 7 can be adjusted by the electromagnet, thereby adjusting the magnitude of the damping force.

[0094] Optionally, the solenoid valve 7 is arranged in the second cavity 1222, and a first buffer pad 61 is connected to the side of the solenoid valve 7 away from the piston, so that the first buffer pad 61 can buffer the force on the solenoid valve 7, avoid damage to the solenoid valve 7, protect the damper 4, and improve the comfort and safety of the ride.

[0095] Optionally, the solenoid valve 7 may also be disposed in the first cavity 1221 .

[0096] Specifically, the material of the first buffer pad 61 can be rubber or silicone.

[0097] Optionally, the damper 4 further includes a solenoid valve 7 ; the solenoid valve 7 is disposed in the pressure chamber 121 and is connected to the first cavity 1221 and / or the second cavity 1222 through a pipeline.

[0098] In the embodiment of the present invention, the conduction between the first cavity 1221 and the second cavity 1222 can be adjusted by the solenoid valve 7, thereby facilitating adjustment of the flow direction and flow rate of the hydraulic oil and ensuring the stiffness of the actuator.

[0099] Optionally, the first component 1 includes a second seal 51 and a third seal 52. One end of the central shaft 12 is sealedly connected to the second seal 51, and the other end is sealedly connected to the third seal 52, so that the inner cavity of the central shaft 12, the second seal 51 and the third seal 52 are enclosed to form a closed cavity, which can avoid leakage of the pressure medium and improve the damping effect.

[0100] Specifically, a first sealing member is provided between the movable member 43 and the inner wall of the central shaft 12 , so that the pressure chamber 121 and the damping chamber 122 are both sealed chambers.

[0101] Optionally, the piston rod 41 is passed through the second sealing member 51 and is slidably connected to the second sealing member 51, so that the piston rod 41 drives the piston valve 42 to slide in the damping chamber 122, thereby causing the volume of the first chamber 1221 and the second chamber 1222 to change, so that the pressure medium flows and generates a damping force.

[0102] Specifically, the pressure chamber 121, i.e., the air chamber, is between the movable part 43 and the third sealing part 52 , the first chamber 1221, i.e., the upper oil chamber, is between the piston valve 42 and the movable part 43 , and the second chamber 1222, i.e., the lower oil chamber, is between the piston valve 42 and the second sealing part 51 .

[0103] Specifically, the second sealing member 51 may be a sealing nut or a sealing plate, etc. The second sealing member 51 may be threadedly connected to the central shaft 12 or welded, etc.

[0104] Specifically, the third sealing member 52 may be a sealing nut or a sealing plate, and the second sealing member 51 may be threadedly connected to the central shaft 12 or welded to the central shaft 12.

[0105] Furthermore, the central shaft 12 has a first step portion, the second seal 51 has a second step portion, and the second step portion and the first step portion are limitedly connected to effectively ensure the connection reliability between the central shaft 12 and the first seal; and / or, the central shaft 12 has a first step portion, the third seal 52 has a second step portion, and the second step portion and the first step portion are limitedly connected to effectively ensure the connection reliability between the central shaft 12 and the second seal 51.

[0106] Optionally, the first step portion is a stepped hole, the second step portion is a stepped protrusion, and the stepped protrusion is embedded in the stepped hole.

[0107] Optionally, the second seal 51 and the piston rod 41 are connected via a sliding bearing 81 to reduce friction, increase the service life of the second seal 51 and the piston rod 41, protect the damper 4, and ensure the axial stiffness of the actuator.

[0108] Specifically, the material of the sliding bearing 81 can be a wear-resistant material such as a copper-based or steel-based material, and its sliding mating surface is also plated with a wear-resistant coating.

[0109] Specifically, the piston valve 42 can be located in the second cavity 1222 , and the sliding bearing 81 can also be disposed in the second cavity 1222 , so that the sliding bearing 81 can be immersed in the hydraulic oil, thereby improving the structural stability of the sliding bearing 81 .

[0110] Specifically, the second sealing member 51 can play a role of transfer to transfer the sliding bearing 81 to the central shaft 12 , so as to ensure the sealing of the second cavity 1222 .

[0111] Optionally, the actuator further includes an end cover 53 ; the end cover 53 is disposed on a side of the second seal 51 away from the third seal 52 , and the end cover 53 is connected to the end of the central shaft 12 ; the end cover 53 is provided with a through hole suitable for passing the piston rod 41 .

[0112] In an embodiment of the present invention, the end cover 53 and the second seal 51 can be arranged at intervals along the axial direction of the central axis 12, and the piston rod 41 is simultaneously passed through the second seal 51 and the end cover 53, which is convenient for controlling the coaxiality of the piston rod 41 and the central axis 12, thereby improving the reliability of the relative movement of the second component 2 and the first component 1 along the axial direction of the actuator.

[0113] Specifically, a through hole may be provided on the end cover 53 , and the axis of the through hole, the axis of the piston rod 41 , and the axis of the central shaft 12 may coincide with each other.

[0114] Specifically, the end cover 53 may be fixedly connected to the central shaft 12 by threaded connection, or may be fixedly connected to the central shaft 12 by welding or bonding.

[0115] Specifically, a sealing ring 82 is provided between the end cap 53 and the second sealing member 51. The sealing ring 82 can be connected to the central shaft 12 and the piston rod 41, respectively, to further ensure the sealing of the second cavity 1222. The sealing ring 82 can be made of a plastic such as polytetrafluoroethylene or polyurethane, and can be provided in an O-ring seal, a U-ring seal, a Sterling seal, or the like.

[0116] Optionally, the first component 1 includes a shell 11 and a first magnetic part 13 arranged on the shell 11, and the second component 2 includes a fixing frame 22 and a second magnetic part 24 arranged on the fixing frame 22; the second magnetic part 24 is arranged opposite to the first magnetic part 13; one end of the central axis 12 is fixedly connected to the shell 11, and the other end is embedded in the fixing frame 22.

[0117] In the embodiment of the present invention, the first magnetic member 13 and the second magnetic member 24 are opposite to each other, so as to facilitate coupling and generate interaction force between the two to achieve relative movement of the first component 1 and the second component 2 along the axial direction of the actuator.

[0118] Optionally, one of the second magnetic part 24 and the first magnetic part 13 is a power-carrying coil, and the other is a permanent magnet. In this way, when the power-carrying coil is energized, a magnetic force is generated between the power-carrying 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 excitation; when the power-carrying coil is de-energized, the road excitation is transmitted to the first component 1 through the wheel, causing mutual movement and interaction between the power-carrying coil and the permanent magnet. According to Faraday's law of electromagnetic induction, passive energy feeding and power generation can be achieved, and energy recovery can be achieved.

[0119] In an embodiment of the invention, the actuator can have an active cancellation mode and a passive cancellation mode. In the active cancellation mode, the coupling between the first magnetic member 13 and the second magnetic member 24 can be used to actively drive the first component 1 or the second component 2 to move, so that the first component 1 or the second component 2 can drive the wheel to move, actively canceling the road excitation. In the passive cancellation mode, the road excitation is transmitted to the first component 1 or the second component 2 through the wheel, which can cause the volume of the first cavity 1221 and the second cavity 1222 to change, causing the pressure medium to flow, thereby passively canceling the road excitation.

[0120] Specifically, the actuator includes a housing 11 and a central shaft 12. The central shaft 12 is disposed in the housing 11 and can be fixed to the housing 11 by bolt connection or welding, or by combining Figure 5 and Figure 6 As shown, the central shaft 12 can also be integrally formed with the housing 11. The central shaft 12 and the housing 11 are connected and combined to form the main structure of the actuator.

[0121] In some embodiments where the first component 1 is a stator component, such as Figure 3 As shown, the housing 11 may include an upper housing 111 and a lower end cover 112. The upper housing 111 may be connected to the vehicle body via a tower top thread 1111. The inner wall of the upper housing 111 may be provided with a mounting groove 1112 for mounting and arranging the first component 1. The upper housing 111 may be connected to the lower end cover 112 via a mounting portion. The inner wall of the upper housing 111 may be provided with a mounting groove 1112 for mounting and arranging the first magnetic member 13.

[0122] Specifically, one end of the central shaft 12 may be fixedly connected to the housing 11 , and the other end may be embedded in the fixing frame 22 and slidably connected to the fixing frame 22 .

[0123] Optionally, the second component 2 includes a support arm 23, which is suitable for connecting to the wheel; one end of the support arm 23 is fixedly connected to the end of the fixing frame 22 away from the central axis 12; the other end of the support arm 23 passes through the bottom of the shell 11.

[0124] In an embodiment of the invention, the coupling between the first magnetic member 13 and the second magnetic member 24 can drive the fixed frame 22 to move, and the fixed frame 22 can drive the support arm 23 to move, and then drive the wheel to move, so as to facilitate the active elimination of road excitation; the road excitation can be transmitted to the support arm 23 through the wheel, and then to the fixed frame 22 for passive elimination.

[0125] In this embodiment of the present invention, the second assembly 2 can drive the support arm 23 to move via the fixed frame 22, thereby driving the wheel to move, thereby facilitating the active elimination of road surface excitation. The road surface excitation can then be transmitted through the wheel to the support arm 23, and then to the piston rod 41, and then eliminated by the damper 4. The fixed frame 22 and support arm 23 can serve as transmission elements to transmit power, resulting in a simple structure.

[0126] Specifically, the fixing frame 22 and the support arm 23 can be fixedly connected by welding or threading. Specifically, the fixing frame 22 and the support arm 23 can both be a rotating body structure. The interior of the fixing frame 22 is hollow, and one end of the fixing frame 22 is sleeved outside the central shaft 12, so that the central shaft 12 can also guide the movement of the fixing frame 22, thereby improving the reliability of the relative movement of the first component 1 and the second component 2 along the axial direction of the actuator.

[0127] Specifically, the other end of the fixing frame 22 can be connected to and blocked by the support arm 23. The support arm 23 can have a limiting groove 231 to embed the end of the fixing frame 22 away from the central axis 12 into the limiting groove 231 to improve the reliability of fixing the fixing frame 22.

[0128] Specifically, the end of the fixing frame 22 away from the support arm 23 may have a first protrusion, and the support arm 23 may have a second protrusion opposite to the first protrusion. The first protrusion, the second protrusion and the outer wall of the fixing frame 22 may be combined to form a receiving space, and the second magnetic member 24 may be arranged in the receiving space.

[0129] Specifically, the fixing frame 22 and the support arm 23 can be fixedly connected, the piston rod 41 and the support arm 23 can be fixedly connected, and one end of the support arm 23 extending out of the shell 11 is suitable for connecting to the wheel. In this way, after the second magnetic part 24 is subjected to the force of the first magnetic part 13, it can drive the fixing frame 22 and the support arm 23 to move, and the support arm 23 can drive the wheel to move, so as to actively eliminate road excitation.

[0130] Specifically, road excitation can be transmitted to the support arm 23 via the wheel. The support arm 23 drives the piston rod 41, which in turn drives the flow of hydraulic oil to generate a damping force, thereby passively eliminating the road excitation. At the same time, the support arm 23 drives the second magnetic member 24 to move. The second magnetic member 24 and the first magnetic member 13 interact and interact with each other, achieving passive energy feedback and power generation according to Faraday's law of electromagnetic induction.

[0131] Optionally, the fixing frame 22 is provided with a guide channel that guides along the axis of the actuator; the support arm 23 blocks the end of the guide channel away from the central axis 12, and is enclosed with the guide channel to form a guide groove 21 with an opening toward the central axis 12; the end of the central axis 12 away from the shell 11 is embedded in the guide groove 21, which can improve the reliability of the relative movement of the first limit member and the second limit member along the axial direction of the actuator.

[0132] Optionally, one end of the piston rod 41 extends into the damping chamber 122, and the other end is arranged in the guide groove 21 and connected to the support arm 23, so that the piston rod 41 can move synchronously with the support arm 23, which can improve the reliability of the piston rod 41 driving the piston valve 42 to slide in the damping chamber 122.

[0133] Specifically, the support arm 23 can be connected to the piston rod 41 in a fixed connection manner, such as Figure 7 and Figure 8 As shown, the support arm 23 and the piston rod 41 can also be formed in one piece.

[0134] Optionally, a second buffer pad 62 is provided on the side of the support arm 23 facing the central shaft 12; the second buffer pad 62 and the end of the central shaft 12 away from the shell 1 are arranged opposite to each other along the axial direction of the actuator. In this way, when the first component 1 and the second component 2 move relative to each other along the axial direction of the actuator, the second buffer pad 62 can buffer the impact force of the support arm 23 on the central shaft 12, so as to provide protection for the support arm 23 and the central shaft 12, thereby improving ride comfort and safety.

[0135] Specifically, the support arm 23 may further be provided with a receiving groove with an opening toward the central axis 12 , and the second buffer pad 62 may be fixed in the receiving groove.

[0136] Optionally, the actuator further includes an elastic member 3 disposed in the housing 11 ; the elastic member 3 is sleeved outside the central shaft 12 , and two ends of the elastic member 3 are respectively in contact with the fixing frame 22 and the housing 11 .

[0137] In the embodiment of the present invention, both ends of the elastic member 3 are connected to the fixing frame 22 and the housing 11 respectively, which can be suitable for supporting the weight of the vehicle body and reducing the thrust load of the actuator.

[0138] Specifically, the elastic member 3 may be a spring or a spring sheet, for example Figure 2 , only illustrates a case where the elastic member 3 is a spring and is sleeved outside the central axis 12. In other cases, the elastic member 3 may also include multiple springs, and the multiple springs are arranged circumferentially around the central axis 12. The embodiment of the present invention does not limit the specific arrangement of the elastic member 3.

[0139] The actuator described in the embodiment of the present invention has at least the following advantages:

[0140] In an embodiment of the present invention, the piston rod of the damper is connected to the second component, and the piston valve of the damper is slidably disposed within the damping chamber. Thus, when the first component and the second component move relative to each other along the axial direction of the actuator, the piston rod can drive the piston valve to slide within the damping chamber, thereby driving the volume change of the first cavity and the second cavity. The first cavity and the second cavity can exchange pressure medium, so that the damper generates a damping force. Since the damping chamber is disposed within the central axis, part of the structure of the damper can be disposed within the central axis, which can save more installation space for the actuator and make the structure of the actuator simpler and the cost lower.

[0141] In a second aspect, an embodiment of the invention further discloses a suspension system comprising the above-mentioned actuator.

[0142] The suspension system described in the embodiment of the invention can achieve the same beneficial effects as the above-mentioned actuator, and will not be described in detail here.

[0143] In a third aspect, an embodiment of the present invention further discloses a vehicle, comprising the above-mentioned actuator or the above-mentioned suspension system.

[0144] The vehicles described in the embodiments of the present invention include but are not limited to cars, trucks, buses, etc.

[0145] The vehicle described in the embodiment of the present invention has the same beneficial effects as the above-mentioned actuator, which will not be described in detail here.

[0146] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they become aware of the basic creative concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the present invention.

[0147] Finally, it should be noted that, in this document, relational terms such as first and second, etc., are used only 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 terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or terminal device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or terminal device that includes the element.

[0148] The above is a detailed introduction to the actuator, suspension system and vehicle provided by the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only suitable for helping to understand the method of the present invention and its core ideas. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the contents of this specification should not be understood as limiting the present invention.

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 the first component (1) comprises a central shaft (12) and a damping chamber (122) is formed in the central shaft (12); A damper (4), the damper (4) comprising a piston rod (41) and a piston valve (42) connected to each other, the piston rod (41) being connected to the second component (2), the piston valve (42) being slidably disposed in the damping chamber (122), and the piston valve (42) dividing the damping chamber into a first chamber (1221) and a second chamber (1222).

2. The actuator according to claim 1, characterized in that The second component (2) has a guide groove (21) arranged along the axial direction of the actuator, and at least a portion of the central shaft (12) is embedded in the guide groove (21); One end of the piston rod (41) extends into the damping chamber (122), and the other end is connected to the guide groove (21).

3. The actuator according to claim 1, characterized in that A pressure chamber (121) is further provided in the central shaft (12), and the damper (4) further includes a movable part (43); The movable member (43) is slidably disposed in the central shaft (12), and the movable member (43) divides the inner cavity of the central shaft (12) into the damping cavity (122) and the pressure cavity (121).

4. The actuator according to claim 3, characterized in that The first cavity (1221) is arranged between the second cavity (1222) and the pressure cavity (121), and the pressure medium in the pressure cavity (121) is gas; The pressure medium in the first cavity (1221) and the second cavity (1222) is hydraulic oil.

5. The actuator according to claim 4, characterized in that A first sealing member is provided between the movable member (43) and the inner wall of the central shaft (12), and the first sealing member is suitable for isolating the pressure chamber (121) and the first cavity (1221).

6. The actuator according to claim 1, characterized in that The piston valve (42) comprises a piston, and a damping hole is provided on the piston, wherein the damping hole is suitable for conducting the first cavity (1221) and the second cavity (1222).

7. The actuator according to claim 6, characterized in that A valve plate is provided in the damping hole, and the valve plate is suitable for adjusting the flow rate of the pressure medium.

8. The actuator according to claim 6, characterized in that The piston valve (42) further includes a solenoid valve (7); The solenoid valve (7) is connected to the piston and is suitable for adjusting the flow rate of the pressure medium.

9. The actuator according to claim 8, characterized in that The solenoid valve (7) is arranged in the second cavity (1222), and a first buffer pad (61) is connected to a side of the solenoid valve (7) away from the piston.

10. The actuator according to claim 3, characterized in that The damper (4) further includes a solenoid valve (7); The solenoid valve (7) is arranged in the pressure chamber (121) and is connected to the first chamber (1221) and / or the second chamber (1222) through a pipeline.

11. The actuator according to claim 3, characterized in that The first component (1) comprises a second sealing member (51) and a third sealing member (52); one end of the central shaft (12) is sealedly connected to the second sealing member (51), and the other end is sealedly connected to the third sealing member (52); the inner cavity of the central shaft (12), the second sealing member (51) and the third sealing member (52) enclose a closed cavity; The piston rod (41) is passed through the second sealing member (51) and is slidably connected to the second sealing member (51).

12. The actuator according to claim 11, characterized in that The second sealing member (51) and the piston rod (41) are connected via a sliding bearing (81).

13. The actuator according to claim 11, wherein: The actuator further includes an end cover (53); The end cover (53) is arranged on a side of the second sealing member (51) away from the third sealing member (52), and the end cover (53) is connected to the end of the central shaft (12); The end cover (53) is provided with a through hole suitable for passing the piston rod (41).

14. The actuator according to claim 1, wherein: The first component (1) includes a housing (11) and a first magnetic member (13) disposed on the housing (11); the second component (2) includes a fixing frame (22) and a second magnetic member (24) disposed on the fixing frame (22); The second magnetic member (24) is arranged opposite to the first magnetic member (13); One end of the central shaft (12) is fixedly connected to the housing (11), and the other end is embedded in the fixing frame (22).

15. The actuator according to claim 14, characterized in that The second component (2) comprises a support arm (23), the support arm (23) being adapted to be connected to a wheel; One end of the support arm (23) is fixedly connected to an end of the fixing frame (22) away from the central axis (12); The other end of the support arm (23) passes through the bottom of the housing (11).

16. The actuator according to claim 15, characterized in that The fixing frame (22) is provided with a guide channel which is axially conductive to the actuator; The support arm (23) blocks one end of the guide channel away from the central axis (12), and is enclosed with the guide channel to form a guide groove (21) with an opening toward the central axis (12); One end of the central shaft (12) away from the housing (11) is embedded in the guide groove (21).

17. The actuator according to claim 16, characterized in that One end of the piston rod (41) extends into the damping chamber (122), and the other end is disposed in the guide groove (21) and connected to the support arm (23).

18. The actuator according to claim 15, wherein: A second buffer pad (62) is provided on one side of the support arm (23) facing the central axis (12); The second buffer pad (62) is arranged opposite to the end of the central shaft (12) away from the housing (1) along the axial direction of the actuator.

19. The actuator according to claim 14, wherein: The actuator further includes an elastic member (3) disposed in the housing (11); The elastic member (3) is sleeved outside the central shaft (12), and two ends of the elastic member (3) are respectively in contact with the fixing frame (22) and the housing (11).

20. The actuator according to any one of claims 1 to 14, 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.

21. A suspension system, characterized in that: Comprising the actuator according to any one of claims 1-20.

22. A vehicle, characterized in that: Comprising the actuator according to any one of claims 1 to 20 or the suspension system according to claim 21.

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