Actuator assembly, suspension system and vehicle

Abstract

The utility model discloses an actuator assembly, suspension system and vehicle, the actuator assembly comprises a first damping device and a second damping device, the first damping device comprises a moving component, the second damping device comprises a piston component and a shell component, in the moving direction of the moving component, the piston component is connected with the axial end part of the moving component, and the shell component is connected with the axial end part of the moving component. The shell assembly comprises a first barrel, a second barrel and a bottom valve assembly, the second barrel is provided with an inner cavity, the piston assembly is arranged in the inner cavity and divides the inner cavity into a first cavity and a second cavity, and the first barrel is arranged on the periphery of the second barrel in a sleeving mode to define an outer cavity. The bottom valve assembly is connected to one axial end of the second barrel and is in limiting fit with the first barrel to limit displacement of the second barrel in the radial direction, and the bottom valve assembly is configured to communicate with the second cavity and the outer cavity under the action of pressure. The actuator assembly provided by the embodiment of the utility model not only can make up for the defect of insufficient response bandwidth of the existing actuator assembly, but also can ensure the working performance of the actuator assembly.

Description

Technical Field

[0001] The utility model relates to the technical field of suspensions, and particularly to an actuator assembly, a suspension system and a vehicle. Background Art

[0002] When a suspension system provided with an actuator assembly is applied to a vehicle, when the vehicle is traveling on an uneven road surface, the vehicle body will be subjected to impacts and vibrations from the road surface. At this time, the suspension system can be used to absorb these impacts and reduce the influence of vibrations on the vehicle body and passengers, thereby providing a more stable driving experience for the passengers and ensuring the comfort of the vehicle.

[0003] However, the existing actuator assembly has the problem of insufficient response bandwidth. When the suspension system moves passively, it cannot effectively absorb high-frequency vibrations, reducing the working performance of the suspension system and further reducing the comfort of the whole vehicle. Summary of the Utility Model

[0004] The utility model aims to at least solve one of the technical problems existing in the prior art. For this reason, the first object of the utility model is to propose an actuator assembly, which can make up for the shortcoming of insufficient existing response bandwidth, thereby solving the technical problem that the actuator assembly in the prior art cannot effectively absorb high-frequency vibrations, resulting in the reduction of the comfort of the whole vehicle.

[0005] The second object of the utility model is to propose a suspension system having the above actuator assembly.

[0006] The third object of the utility model is to propose a vehicle having the above suspension system.

[0007] The actuator assembly according to an embodiment of the utility model includes: a first damping device, the first damping device including a movable component that can move reciprocally; a second damping device, the second damping device including a piston component and a housing component. In the moving direction of the movable component, the piston component is connected to the axial end of the movable component. The housing component includes a first cylinder, a second cylinder and a bottom valve component. The interior of the second cylinder is hollow to define an inner cavity. At least part of the piston component is disposed in the inner cavity and is movably engaged with the second cylinder relatively to divide the inner cavity into a first chamber and a second chamber that communicate with each other. The first cylinder is sleeved on the outer periphery of the second cylinder and is spaced apart from the second cylinder in the radial direction. An outer cavity is defined between the first cylinder and the second cylinder. The first cylinder is adapted to be connected to the wheel end of the vehicle. The bottom valve component is connected to one axial end of the second cylinder and is engaged with the first cylinder in a limiting manner to limit the radial displacement of the second cylinder. The bottom valve component is configured to communicate the first chamber and the outer cavity under the action of pressure to supply a pressure medium to the first chamber or extract the pressure medium in the first chamber.

[0008] According to the actuator assembly of the embodiment of the present utility model, by providing a second damping device and connecting the piston assembly of the second damping device to the axial end of the moving assembly, a second damping device is connected in series on the first damping device, so as to facilitate making up for the disadvantage of the insufficient response bandwidth of the first damping device, that is, making up for the disadvantage of the insufficient response bandwidth of the actuator assembly in the prior art, and ensuring the working performance of the actuator assembly. At the same time, in this application, the housing assembly of the second damping device is set to include a first cylinder body, a second cylinder body and a bottom valve assembly. While enabling the piston assembly to form a relatively movable fit with the housing assembly, the bottom valve assembly can also be used to improve the structural stability of the housing assembly, so that the piston assembly and the second cylinder body can perform a relatively movable fit along a predetermined direction, ensuring the working performance of the second damping device, and thereby ensuring the working performance of the actuator assembly. That is to say, the actuator assembly of this application can not only make up for the disadvantage of the insufficient response bandwidth of the actuator assembly in the prior art, but also has excellent working performance.

[0009] In some embodiments, one of the bottom valve assembly and the bottom wall of the first cylinder body is provided with a limiting protrusion, and the other is provided with a limiting groove, and the limiting protrusion is in limiting fit in the limiting groove.

[0010] In some embodiments, the moving assembly includes a conversion member and a housing, the housing is fixedly connected to the conversion member, the first damping device includes a driving member and a rotating member cooperating with the conversion member, the driving member is used to drive the rotating member to rotate, and the conversion member is used to convert the rotation of the rotating member into the movement of the conversion member.

[0011] In some embodiments, the piston assembly includes a piston rod and a piston head provided on the piston rod, the piston rod is connected to the housing, and the piston head is arranged in the inner cavity and is in sliding fit with the inner wall of the second cylinder body to define the first chamber and the second chamber.

[0012] In some embodiments, the piston rod and the housing are an integral part.

[0013] In some embodiments, the housing assembly further includes an end cap, the end cap is connected to one end of the first cylinder body facing the housing, a guide ring is provided on the end cap, and at least part of the guide ring is sleeved on the outer periphery of the housing and is in sliding fit with the housing.

[0014] In some embodiments, a sliding bearing is provided between the guide ring and the outer peripheral wall of the housing.

[0015] In some embodiments, the second damping device includes a limiting assembly, and the limiting assembly is configured to limit the relative movement range between the piston assembly and the housing assembly.

[0016] In some embodiments, the limiting assembly includes a first limiting member and a second limiting member which are arranged at intervals. In the moving direction of the piston assembly, the first limiting member is arranged between the end cover and the housing, and the second limiting member is arranged between the end cover and the piston head. The first limiting member and the second limiting member cooperate to limit the relative movement range between the piston assembly and the housing assembly.

[0017] In some embodiments, both the first limiting member and the second limiting member are formed as elastic members.

[0018] In some embodiments, the piston head is provided with a first communication hole and a second communication hole that communicate the first chamber and the second chamber. The first communication hole is configured to convey the pressure medium in the second chamber to the first chamber, and the second communication hole is configured to convey the pressure medium in the first chamber to the second chamber.

[0019] In some embodiments, the bottom valve assembly is provided with a third communication hole and a fourth communication hole that communicate the outer chamber and the first chamber. The third communication hole is configured to convey the pressure medium in the first chamber to the outer chamber to extract the pressure medium in the first chamber, and the fourth communication hole is configured to convey the pressure medium in the outer chamber to the first chamber to supply the pressure medium to the first chamber.

[0020] In some embodiments, the actuator assembly further includes a connecting arm, and the first cylinder body is adapted to be connected to the wheel end through the connecting arm.

[0021] The suspension system according to an embodiment of the present invention includes the aforementioned actuator assembly.

[0022] The suspension system according to an embodiment of the present invention adopts the aforementioned actuator assembly to make up for the deficiency of the response bandwidth of the suspension system in the prior art, thereby ensuring the working performance of the suspension system.

[0023] The vehicle according to an embodiment of the present invention includes the aforementioned suspension system.

[0024] The vehicle according to an embodiment of the present invention can improve the comfort of the vehicle and further enhance the driving and riding experience by adopting the aforementioned suspension system.

[0025] The additional aspects and advantages of the present invention will become apparent in the following description or be understood through the practice of the present invention. Description of the Drawings

[0026] The above and / or additional aspects and advantages of the present utility model will become apparent and be readily understood from the following description of embodiments in conjunction with the accompanying drawings, where:

[0027] Figure 1 is a schematic diagram of an actuator assembly according to some embodiments of the present utility model.

[0028] Figure 2 is a front view of an actuator assembly according to some embodiments of the present utility model.

[0029] Figure 3 is Figure 2 a cross-sectional view taken along line A-A.

[0030] Figure 4 is Figure 3 an enlarged view of region I in.

[0031] Figure 5 is Figure 4 an enlarged view of region II in.

[0032] Figure 6 is a schematic diagram of the housing of a first damping device according to some embodiments of the present utility model.

[0033] Figure 7 is a front view of the housing of a first damping device according to some embodiments of the present utility model.

[0034] Figure 8 is Figure 7 a cross-sectional view taken along line B-B.

[0035] Figure 9 is a schematic diagram of a guide ring according to some embodiments of the present utility model.

[0036] Figure 10 is a front view of a guide ring according to some embodiments of the present utility model.

[0037] Figure 11 is Figure 10 a cross-sectional view taken along line C-C.

[0038] Reference numerals:

[0039] 1000, actuator assembly;

[0040] 100, first damping device;

[0041] 110, moving component;

[0042] 111, conversion piece;

[0043] 112, housing; 1121, first flange; 1122, first connection hole;

[0044] 120, rotating piece;

[0045] 130. Driving member;

[0046] 140. Housing portion;

[0047] 141. Motor housing;

[0048] 142. Guide housing; 1421. First housing segment; 1422. Second housing segment; 1423. Third housing segment;

[0049] 200. Second damping device;

[0050] 210. Housing assembly;

[0051] 211. First cylinder; 2111. Limiting groove; 2112. Connecting protrusion;

[0052] 212. Second cylinder; 230. First chamber; 240. Second chamber; a. Inner cavity;

[0053] 213. Outer cavity;

[0054] 214. Bottom valve assembly;

[0055] 2141. Third communication hole; 2142. Fourth communication hole; 2143. Limiting protrusion;

[0056] 215. Third valve plate;

[0057] 216. Fourth valve plate;

[0058] 217. Second connecting bolt;

[0059] 218. Guide ring;

[0060] 219. End cover; 2182. Second connecting hole;

[0061] 220. Piston assembly;

[0062] 221. Piston rod; 2211. Fastening thread;

[0063] 222. Piston head;

[0064] 250. Second fastener;

[0065] 260. Limiting assembly; 262. Second limiting member;

[0066] 270. Cage; 280. Fixing member; 290. Sealing member;

[0067] 300. Connecting arm; 400. Sliding bearing. Detailed implementation manners

[0068] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as limiting the present utility model.

[0069] 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 accompanying 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 limiting the present utility model.

[0070] The actuator assembly 1000 of the embodiment of the present utility model will be described below with reference to the accompanying drawings of the specification.

[0071] Combined with Figure 1 、 Figure 2 and Figure 3 As shown, the actuator assembly 1000 according to the embodiment of the present utility model includes: a first damping device 100 and a second damping device 200.

[0072] Among them, combined with Figure 1 、 Figure 2 and Figure 3 As shown, the first damping device 100 includes a moving component 110, and the moving component 110 can reciprocate.

[0073] In some embodiments, combined with Figure 1 、 Figure 2 and Figure 3 As shown, the first damping device 100 includes a housing portion 140, and at least part of the structure of the moving component 110 is provided in the housing portion 140, so as to support and protect the moving component 110 by using the housing portion 140, to ensure the structural stability of the moving component 110 to a certain extent, and to extend the service life of the moving component 110.

[0074] It should be noted that the above-mentioned moving component 110 can reciprocate, which can be understood as that the moving component 110 can reciprocate relative to the housing portion 140, so as to ensure the working performance of the first damping device 100.

[0075] Combined with Figure 3 and Figure 4As shown in the figure, the second damping device 200 includes a piston assembly 220 and a housing assembly 210. In the moving direction of the moving assembly 110, the piston assembly 220 is connected to the axial end of the moving assembly 110. The housing assembly 210 includes a first cylinder 211, a second cylinder 212, and a bottom valve assembly 214. The interior of the second cylinder 212 is hollow to define an inner cavity a. At least part of the piston assembly 220 is disposed within the inner cavity a and is movably engaged with the second cylinder 212 relative to each other, so as to divide the inner cavity a into a first chamber 230 and a second chamber 240 that communicate with each other. The first cylinder 211 is sleeved on the outer periphery of the second cylinder 212 and is spaced apart from the second cylinder 212 in the radial direction. An outer cavity 213 is defined between the first cylinder 211 and the second cylinder 212. The first cylinder 211 is adapted to be connected to the wheel end of the vehicle. The bottom valve assembly 214 is connected to one axial end of the second cylinder 212 and is in limiting cooperation with the first cylinder 211 to limit the radial displacement of the second cylinder 212. The bottom valve assembly 214 is configured to communicate the first chamber 230 and the outer cavity 213 under pressure to supply a pressure medium to the first chamber 230 or extract the pressure medium in the first chamber 230.

[0076] Among them, by setting the second damping device 200 to have a piston assembly 220, a first chamber 230, a second chamber 240, and an outer cavity 213, etc., the purpose of using the second damping device 200 for vibration reduction can be achieved, thereby ensuring the working performance of the second damping device 200.

[0077] In a specific example, since at least part of the piston assembly 220 is disposed within the inner cavity a and is movably engaged with the second cylinder 212 relative to each other, the inner cavity a is divided into a first chamber 230 and a second chamber 240 that communicate with each other, so that the pressure medium in the first chamber 230 can flow into the second chamber 240. Correspondingly, the pressure medium in the second chamber 240 can also flow into the first chamber 230. In this way, the pressure medium can flow between the first chamber 230 and the second chamber 240, so as to utilize the damping force generated when the pressure medium flows to buffer the vibration, thereby enabling the second damping device 200 to filter out high-frequency and low-amplitude vibrations and ensuring the working performance of the second damping device 200.

[0078] Among them, the pressure medium mentioned here can be understood as hydraulic oil.

[0079] Specifically, when the volume of the first chamber 230 decreases, the volume of the second chamber 240 increases, and the hydraulic oil in the first chamber 230 can flow into the second chamber 240; when the volume of the first chamber 230 increases, the volume of the second chamber 240 decreases, and the hydraulic oil in the second chamber 240 can flow into the first chamber 230. The hydraulic oil generates a damping force when flowing, enabling the second damping device 200 to filter out high-frequency and low-amplitude vibrations.

[0080] In addition, an outer cavity 213 is defined between the first cylinder 211 and the second cylinder 212, and the bottom valve assembly 214 is configured to communicate the first chamber 230 and the outer cavity 213 under pressure to supply a pressure medium to the first chamber 230 or extract the pressure medium in the first chamber 230, so as to realize supplementing hydraulic oil from the outer cavity 213 to the first chamber 230 or discharging a part of the hydraulic oil in the first chamber 230 into the outer cavity 213, so that the volume of the first chamber 230 can effectively change, thereby ensuring the working performance of the second damping device 200.

[0081] Among them, the moving direction of the moving assembly 110 described above can be understood as Figure 1 、 Figure 2 and Figure 3 the X direction shown in, that is, the axial direction of the actuator assembly 1000. That is to say, on the axial direction of the actuator assembly 1000, the piston assembly 220 is connected to the axial end of the moving assembly 110.

[0082] Through the above settings, the second damping device 200 can be connected in series on the first damping device 100, so that the actuator assembly 1000 integrates the first damping device 100 and the second damping device 200 at the same time. In this way, when the actuator assembly 1000 is applied to a vehicle, when excited by the road surface, the second damping device 200 can absorb high-frequency vibrations, and the redundant vibrations are borne by the first damping device 100, expanding the vibration response bandwidth, thereby making up for the shortage of the response bandwidth of the suspension system in the prior art, ensuring the working performance of the actuator assembly 1000, and improving the comfort of the vehicle.

[0083] It should be noted that, compared with the parallel connection of the first damping device 100 and the second damping device 200 in the prior art, the series connection of the first damping device 100 and the second damping device 200 in the actuator assembly 1000 of the present application can shorten the response time to further ensure the working performance of the actuator assembly 1000.

[0084] It should also be noted that the piston assembly 220 and the second cylinder 212 are arranged to have a relatively movable fit. In this way, when the second cylinder 212 is displaced radially, it will cause the piston assembly 220 and the second cylinder 212 to be unable to move relative to each other, affecting the damping performance of the second damping device 200.

[0085] Based on this, in the present application, the housing assembly 210 is configured to include a first cylinder 211, a second cylinder 212, and a bottom valve assembly 214, and the bottom valve assembly 214 is connected to an axial end of the second cylinder 212 and is in limit fit with the first cylinder 211, so as to limit the radial displacement of the second cylinder 212 by the cooperation of the first cylinder 211 and the bottom valve assembly 214, thereby improving the position stability of the second cylinder 212. In this way, when the piston assembly 220 is movably cooperated with the second cylinder 212 relatively, the piston assembly 220 and the second cylinder 212 can accurately move relatively along the established route, which can ensure the working performance of the second damping device 200, and further ensure the overall vibration damping performance of the actuator assembly 1000.

[0086] In summary, the actuator assembly 1000 of the present application not only integrates the second damping device 200 and the first damping device 100, but also ensures the working performance of the second damping device 200, thereby ensuring that the actuator assembly 1000 can meet the requirements of shock mitigation and vibration reduction, and improving the ride comfort of the vehicle.

[0087] In addition, by configuring the housing assembly 210 to have a first cylinder 211 and a second cylinder 212, and sleeving the first cylinder 211 on the outer periphery of the second cylinder 212 and spacing it apart from the second cylinder 212 in the radial direction, an outer cavity 213 is defined between the first cylinder 211 and the second cylinder 212, so that the second damping device 200 of the present application is formed as a double-cylinder damper, which makes the structure of the second damping device 200 simple and convenient to arrange, and greatly reduces the manufacturing cost of the second damping device 200.

[0088] In a specific example, when the actuator assembly 1000 is subjected to road surface excitation, the road surface excitation is transmitted from the wheel to the second damping device 200, causing the piston assembly 220 to move relatively with respect to the housing assembly 210, for absorbing part of the high-frequency vibration, and the remaining vibration (such as low-frequency high-amplitude and low-frequency low-amplitude vibrations) is transmitted through the second damping device 200 to the first damping device 100, and relying on the first damping device 100 to generate a damping force that inhibits the rectilinear movement of the moving assembly 110, so as to provide an active force to inhibit the vehicle body vibration.

[0089] From the above structure, it can be seen that for the actuator assembly 1000 of the embodiment of the present utility model, by connecting the second damping device 200 to one end of the first damping device 100, it can absorb part of the high-frequency vibration by using the second damping device 200, reduce the active thrust that the first damping device 100 needs to provide, and make up for the shortcoming of the insufficient response bandwidth of the first damping device 100, increase the bandwidth of the vibration filtering frequency of the actuator assembly 1000, meet the requirements of shock mitigation and vibration reduction of the actuator assembly 1000, and thus improve the ride comfort of the vehicle.

[0090] Meanwhile, by using the cooperation of the first cylinder body 211 and the bottom valve assembly 214 to limit the radial displacement of the second cylinder body 212, the structural stability of the second cylinder body 212 is improved, so that the piston assembly 220 and the second cylinder body 212 can accurately move relative to each other along a predetermined route, ensuring the working performance of the second damping device 200.

[0091] It can be understood that, compared with the prior art, the actuator assembly 1000 of the present application not only integrates the first damping device 100 and the second damping device 200, but also sets the housing assembly 210 to include the first cylinder body 211, the second cylinder body 212 and the bottom valve assembly 214, so as to utilize the cooperation of the first cylinder body 211 and the bottom valve assembly 214 to limit the radial displacement of the second cylinder body 212, thereby improving the position accuracy when the piston assembly 220 and the second cylinder body 212 can move relative to each other, so as to ensure the working performance of the second damping device 200, and realizing vibration reduction by using the cooperation of the first damping device 100 and the second damping device 200, increasing the bandwidth of the vibration filtering frequency of the actuator assembly 1000, meeting the requirements of the actuator assembly 1000 for reducing impact and vibration, and ensuring the stroke space of the first damping device 100, thereby ensuring the working performance of the actuator assembly 1000.

[0092] In some embodiments, the piston assembly 220 is slidably engaged with the housing assembly 210 to facilitate the relative movement cooperation between the piston assembly 220 and the housing assembly 210, thereby ensuring the working performance of the second damping device 200.

[0093] Optionally, the inner cavity a forms a fitting cavity opening towards the piston assembly 220, and at least part of the piston assembly 220 extends into the inner cavity a through the opening and is movably engaged with the second cylinder body 212 relatively, reducing the cooperation difficulty between the piston assembly 220 and the housing assembly 210, and reducing the forming difficulty of the first chamber 230 and the second chamber 240.

[0094] In some embodiments, the bottom valve assembly 214 can be connected to one axial end of the second cylinder body 212 by connection means such as bolt connection, snap connection, welding or bonding, so that the relative position of the bottom valve assembly 214 and the second cylinder body 212 is stable, thereby facilitating the use of the bottom valve assembly 214 to limit the second cylinder body 212, improving the structural stability of the second cylinder body 212, so that the piston assembly 220 and the second cylinder body 212 can accurately move relative to each other along a predetermined route, ensuring the working performance of the second damping device 200.

[0095] In some embodiments, in combination with Figure 3 、 Figure 4 and Figure 5As shown, one of the bottom valve assembly 214 and the bottom wall of the first cylinder 211 is provided with a limiting protrusion 2143, and the other is provided with a limiting groove 2111. The limiting protrusion 2143 is in limiting fit within the limiting groove 2111. To achieve the limiting fit between the bottom valve assembly 214 and the first cylinder 211, making the relative positions of the bottom valve assembly 214 and the first cylinder 211 stable. In this way, when the bottom valve assembly 214 is connected to one axial end of the second cylinder 212, the bottom valve assembly 214 and the first cylinder 211 can be used in cooperation to support and limit the second cylinder 212, so as to limit the displacement of the second cylinder 212 in the first direction, improve the structural stability of the second cylinder 212, and thus enable the piston assembly 220 and the second cylinder 212 to accurately move relative to each other along a predetermined route, ensuring the working performance of the second damping device 200.

[0096] It should be noted that by using the cooperation of the limiting protrusion 2143 and the limiting groove 2111 to achieve the limiting fit between the bottom valve assembly 214 and the first cylinder 211, the difficulty of the limiting fit between the bottom valve assembly 214 and the first cylinder 211 can be reduced to a certain extent.

[0097] In some embodiments, in combination with Figure 3 、 Figure 4 and Figure 5 As shown, the bottom valve assembly 214 is provided with a limiting protrusion 2143, and the bottom wall of the first cylinder 211 is provided with a limiting groove 2111. The limiting protrusion 2143 is in limiting fit within the limiting groove 2111 to achieve the limiting fit between the bottom valve assembly 214 and the first cylinder 211.

[0098] Of course, in some other embodiments, a limiting groove 2111 can also be provided on the bottom valve assembly 214, and a limiting protrusion 2143 can be provided on the bottom wall of the first cylinder 211. In this way, by fitting the limiting protrusion 2143 within the limiting groove 2111, the limiting fit between the bottom valve assembly 214 and the first cylinder 211 can also be achieved.

[0099] It should be noted that the so-called limiting protrusion 2143 can be an arc-shaped protrusion. Correspondingly, the limiting groove 2111 is formed as an arc-shaped groove, so that the fit between the first cylinder 211 and the bottom valve assembly 214 is an arc-shaped fit, which is beneficial to the radial positioning of the bottom valve assembly 214, improves the position stability of the bottom valve assembly 214, and further improves the position stability of the second cylinder 212.

[0100] In some embodiments, in combination with Figure 2 and Figure 3As shown, the moving component 110 includes a conversion member 111 and a housing 112. The housing 112 is fixedly connected to the conversion member 111. The first damping device 100 includes a driving member 130 and a rotating member 120. The rotating member 120 cooperates with the conversion member 111. The driving member 130 is used to drive the rotating member 120 to rotate, and the conversion member 111 is used to convert the rotation of the rotating member 120 into the movement of the conversion member 111. Here, it means that the conversion member 111 can convert the rotational movement of the rotating member 120 into the translational movement of the conversion member 111. In this way, when the driving member 130 drives the rotating member 120 to rotate, the relative movement of the conversion member 111 can be controlled by using the rotating member 120, the difficulty of the movement of the conversion member 111 can be reduced, and the working performance of the conversion member 111 can be ensured.

[0101] It should be noted that the conversion member 111 is fixedly connected to the housing 112. In this way, when the rotating member 120 controls the relative movement of the conversion member 111, the housing 112 can be driven to move relatively by using the conversion member 111, so as to drive the moving component 110 to move relatively, reduce the difficulty of the movement of the moving component 110, and ensure the working performance of the moving component 110, thereby ensuring the working performance of the first damping device 100.

[0102] In some embodiments, as Figure 3 shown, the housing portion 140 is sleeved on the outer periphery of the housing 112. During the movement of the housing 112, the housing portion 140 has a guiding structure for guiding the moving direction of the housing 112, so as to improve the position accuracy during the movement of the housing 112 and ensure the working performance of the first damping device 100 to a certain extent.

[0103] Optionally, as Figure 3 shown, the housing portion 140 includes: a motor housing 141 and a guiding housing 142. The power source of the driving member 130 is arranged in the motor housing 141. One end of the guiding housing 142 is connected to the motor housing 141, and the other end forms an open mouth. At least a part of the housing 112 is movably arranged in the guiding housing 142 via the open mouth.

[0104] Specifically, the guiding housing 142 includes a first housing section 1421, a second housing section 1422, and a third housing section 1423 that are connected in sequence in the X direction and have gradually decreasing outer diameters. The first housing section 1421 is connected to the motor housing 141 through a flange. The second housing section 1422 is adapted to accommodate the conversion member 111 and is used for limiting the stroke of the conversion member 111. The third housing section 1423 is sleeved on the housing 112 and is adapted to provide movement guidance for the housing 112.

[0105] That is to say, one end of the first housing section 1421 in the X direction can form a flange, and the first housing section 1421 is connected to the motor housing 141 through the flange to improve the fixing stability and reliability of the power source of the driving member 130. The other end of the first housing section 1421 can form an annular disc structure, and the annular disc structure is connected to one end of the second housing section 1422. The other end of the second housing section 1422 is connected to the third housing section 1423 through another annular disc structure, and this annular disc structure can be used to limit the stroke of the conversion member 111 of the moving assembly 110, improve the working stability of the moving assembly 110, and the third housing section 1423 realizes the movement guidance of the outer housing 112, improves the movement smoothness of the first damping device 100, and improves the working stability of the actuator assembly 1000.

[0106] It should be noted that the inner diameter of the third housing section 1423 can be slightly larger than or equal to the outer diameter of the outer housing 112 to realize the movement guidance of the outer housing 112 and reduce the radial runout of the outer housing 112.

[0107] In some embodiments, the inner diameter of the third housing section 1423 is slightly larger than the outer diameter of the outer housing 112, and a guide bearing is provided between the third housing section 1423 and the outer housing 112. The guide bearing is used to realize the guiding fit between the third housing section 1423 and the outer housing 112 to reduce the radial runout of the outer housing 112.

[0108] In some embodiments, in combination with Figure 3 , Figure 6 and Figure 7 as shown, one end of the outer housing 112 is provided with a first flange 1121. The first flange 1121 is provided with first connection holes 1122. The first flange 1121 is connected to the conversion member 111 through first fasteners passing through the first connection holes 1122 to realize the fixed connection between the conversion member 111 and the outer housing 112 and ensure the connection quality. Thus, when the rotating member 120 controls the relative movement of the conversion member 111, the conversion member 111 can drive the outer housing 112 to move relatively, so as to drive the moving assembly 110 to move relatively and reduce the moving difficulty of the moving assembly 110.

[0109] Among them, the first fasteners mentioned here can be fastening bolts, fastening screws, etc.

[0110] In some embodiments, as Figure 6 shown, the first flange 1121 is provided with a plurality of first connection holes 1122. The plurality of first connection holes 1122 are arranged at intervals along the circumferential direction of the first flange 1121. The cooperation of the plurality of first connection holes 1122 enables the conversion member 111 and the outer housing 112 to be fixedly connected through a plurality of first fasteners, further ensuring the connection quality and improving the connection strength.

[0111] Of course, in some other embodiments, the first flange 1121 can also be connected to the conversion member 111 by means of bonding, snap connection or other connection methods.

[0112] In some embodiments, in combination Figure 2 with Figure 3 As shown, the conversion member 111 and the housing 112 are hollow inside. This facilitates sleeving the conversion member 111 and the housing 112 on the outer periphery of the rotating member 120, thereby facilitating the cooperation between the rotating member 120 and the conversion member 111, reducing the cooperation difficulty between the rotating member 120 and the conversion member 111, thereby reducing the movement difficulty of the conversion member 111, and ensuring the working performance of the conversion member 111 and the working performance of the first damping device 100.

[0113] In some embodiments, the rotating member 120 is a lead screw shaft, and the conversion member 111 is formed as a ball nut that mates with the lead screw shaft, so that the rotating member 120 and the conversion member 111 form a ball screw assembly.

[0114] In a specific example, the conversion member 111 is sleeved on the outer periphery of the rotating member 120 and the threads on the conversion member 111 cooperate with the lead screw shaft to ensure that the conversion member 111 can move relatively along the extension direction of the rotating member 120 during the rotation of the rotating member 120, thereby facilitating the control of the relative movement of the conversion member 111 by the rotating member 120 and reducing the movement difficulty of the conversion member 111.

[0115] In a specific example, the driving member 130 is a rotating motor, and the rotating motor is used to drive the lead screw shaft to rotate. During the rotation of the lead screw shaft, the conversion member 111 is driven to move along the axial direction of the lead screw shaft, and further the moving assembly 110 can move relatively to ensure the working performance of the first damping device 100.

[0116] Of course, in some other embodiments, the rotating member 120 and the conversion member 111 can also be formed in the form of a sliding rail and a slider, or in the form of a gear and a rack.

[0117] Optionally, in combination Figure 3 with Figure 4As shown, the piston assembly 220 includes a piston rod 221 and a piston head 222 provided on the piston rod 221. The piston rod 221 is connected to the outer shell 112, and the piston head 222 is disposed in the inner cavity a and is slidably engaged with the inner wall of the second cylinder 212 to define a first chamber 230 and a second chamber 240. That is to say, the piston rod 221 is connected to the outer shell 112, and the piston head 222 is connected to the piston rod 221 to realize connecting the piston assembly 220 to the axial end of the moving assembly 110, thereby realizing connecting the second damping device 200 in series on the first damping device 100, so that the actuator assembly 1000 integrates the first damping device 100 and the second damping device 200 at the same time, ensuring the working performance of the actuator assembly 1000.

[0118] At the same time, by connecting the piston rod 221 to the outer shell 112, it is also possible to realize supporting the piston rod 221 and the piston head 222 by the outer shell 112, improving the position stability of the piston rod 221 and the piston head 222, so that the piston head 222 and the second cylinder 212 can effectively move relative to each other, thereby facilitating dividing the inner cavity a into a first chamber 230 and a second chamber 240 that communicate with each other.

[0119] In a specific example, when controlling the movement of the piston head 222 relative to the second cylinder 212, it is convenient to use the first chamber 230 and the second chamber 240 to provide resistance to the relative movement of the piston head 222, so as to achieve the purpose of damping vibration by the second damping device 200, and further ensure the working performance of the second damping device 200.

[0120] In some embodiments, as shown in Figure 4 、 Figure 6 and Figure 7 , the piston assembly 220 includes a fixing member 280. One end of the piston rod 221 where the piston head 222 is provided is provided with a fastening thread 2211. The fixing member 280 is fixedly connected to the piston rod 221 through the fastening thread 2211. The piston head 222 is sleeved on the piston rod 221 and is located between at least part of the piston rod 221 and the fixing member 280, so as to realize fixedly connecting the piston head 222 to the piston rod 221, reducing the connection difficulty between the piston head 222 and the piston rod 221, and improving the connection strength.

[0121] In some embodiments, as shown in Figure 6 、 Figure 7 and Figure 8 , the piston rod 221 and the outer shell 112 are an integral part. Simplifying the connection device makes the structure more compact, reduces the connection difficulty between the piston rod 221 and the outer shell 112, improves the connection quality, thereby facilitating supporting the piston rod 221 by the outer shell 112 and ensuring the working performance of the piston rod 221.

[0122] In summary, the present application adopts a series connection method of the first damping device 100 and the second damping device 200, and integrally designs the outer shell 112 of the first damping device 100 and the piston rod 221 of the second damping device 200, simplifying the connecting device, making the structure of the actuator assembly 1000 more compact, effectively reducing high-frequency damping, thereby making up for the deficiency of the active vibration damping structure in high-frequency comfort.

[0123] Of course, in some other embodiments, the piston rod 221 and the outer shell 112 can also be formed as separate parts. After the piston rod 221 and the outer shell 112 are separately processed, the piston rod 221 and the outer shell 112 are then connected. In this way, it is also possible to use the outer shell 112 to support the piston rod 221 and ensure the working performance of the piston rod 221.

[0124] Among them, the connection mentioned here can be welding, bonding, snap connection or bolt connection, etc.

[0125] In some embodiments, in combination Figure 3 、 Figure 4 and Figure 9 As shown, the housing assembly 210 further includes an end cap 219. The end cap 219 is connected to one end of the first cylinder 211 facing the outer shell 112. A guide ring 218 is provided on the end cap 219. At least part of the guide ring 218 is sleeved on the outer periphery of the outer shell 112 and is in sliding fit with the outer shell 112. Since the piston rod 221 is connected to the outer shell 112, the piston head 222 is connected to the piston rod 221 and the piston head 222 is in sliding fit with the inner wall of the second cylinder 212, a relative displacement is formed between the housing assembly 210 and the outer shell 112. Based on this, the present application provides a guide ring 218 on the end cap 219 of the housing assembly 210, and at least part of the guide ring 218 is sleeved on the outer periphery of the outer shell 112 and is in sliding fit with the outer shell 112. In this way, when the piston assembly 220 and the second cylinder 212 move relatively, the guide ring 218 and the outer shell 112 can be used to ensure the coaxiality of the first damping device 100 and the second damping device 200, and the guiding length of the movement of the piston rod 221 is increased, and the movement direction of the housing assembly 210 is limited by using the outer shell 112, so as to realize the limitation of the relative movement direction of the piston head 222 and the housing assembly 210, to a certain extent, avoiding the offset of the piston head 222 and the housing assembly 210 during the movement, ensuring the position accuracy when the piston head 222 and the housing assembly 210 move relatively, and thus ensuring the working performance of the second damping device 200.

[0126] Among them, the protruding height of the guide ring 218 can be adjusted accordingly according to the actual situation, and the present application does not make specific limitations.

[0127] In some embodiments, such as Figure 3As shown, the end cap 219 and the guide ring 218 are integrally formed to reduce the forming difficulty of the guide ring 218 and increase the connection strength between the end cap 219 and the guide ring 218, so that the guide ring 218 can be stably connected to the end cap 219, thereby improving the position stability of the guide ring 218 and ensuring the working performance of the guide ring 218 to a certain extent.

[0128] Of course, in some other embodiments, the end cap 219 and the guide ring 218 may also be formed as separate parts, and the guide ring 218 may be arranged on the end cap 219 by connection methods such as welding, bonding or bolt connection. This application does not make specific restrictions.

[0129] In some embodiments, the end cap 219 is assembled at the opening of the inner cavity a to close the inner cavity a and ensure the sealing performance of the inner cavity a. In this way, when the control piston head 222 moves relative to the housing assembly 210, it is convenient to use the first chamber 230 and the second chamber 240 to provide resistance to the relative movement of the piston head 222, so as to achieve the purpose of damping vibration by using the second damping device 200.

[0130] That is to say, the end cap 219 of the present application can not only support the guide ring 218, but also close the inner cavity a.

[0131] In some embodiments, in combination Figure 3 and Figure 4 As shown, a sliding bearing 400 is provided between the outer peripheral wall of the guide ring 218 and the outer shell 112. While ensuring that the guide ring 218 and the outer shell 112 can form a sliding fit, the sliding bearing 400 can also ensure the coaxiality of the first damping device 100 and the second damping device 200, and further ensure the coaxiality of the piston head 222 and the housing assembly 210 during the relative movement process, and improve the position accuracy of the piston head 222 and the housing assembly 210 during the relative movement.

[0132] In some embodiments, in combination Figure 4 、 Figure 9 、 Figure 10 and Figure 11 As shown, the end cap 219 is provided with a second connection hole 2182, and the end cap 219 is connected to the housing assembly 210 through a second fastener 250 passing through the second connection hole 2182 (for the specific structure of the second fastener 250, see Figure 4) to achieve the fixed connection between the end cap 219 and the housing assembly 210 and ensure the connection quality, so that the relative position of the guide ring 218 and the housing assembly 210 is stable. In this way, when the housing assembly 210 and the piston head 222 move relatively, the guide ring 218 and the outer shell 112 can move relatively, so as to use the cooperation of the guide ring 218 and the outer shell 112 to define the relative movement direction of the piston head 222 and the housing assembly 210, to a certain extent, avoiding the offset of the piston head 222 and the housing assembly 210 during the movement, ensuring the position accuracy when the piston head 222 and the housing assembly 210 move relatively, and thus ensuring the working performance of the second damping device 200.

[0133] Among them, the second fastener 250 mentioned here can be a fastening bolt, a fastening screw, etc.

[0134] In some embodiments, in combination with Figure 9 , Figure 10 and Figure 11 as shown, a plurality of second connection holes 2182 are provided on the end cap 219. The plurality of second connection holes 2182 are arranged at intervals along the circumferential direction of the end cap 219. The cooperation of the plurality of second connection holes 2182 enables the end cap 219 and the housing assembly 210 to be fixedly connected through a plurality of second fasteners 250, further ensuring the connection quality and improving the connection strength.

[0135] Of course, in some other embodiments, the end cap 219 can also be connected to the housing assembly 210 by connection methods such as bonding and snap connection.

[0136] In a specific example, the end cap 219 and the housing assembly 210 form a detachable connection through the second fastener 250, which can reduce the assembly and disassembly difficulty of the guide ring 218 and the housing assembly 210. Since the sliding bearing 400 is a vulnerable part and needs to be regularly overhauled and replaced, the replacement difficulty of the sliding bearing 400 can be reduced.

[0137] At the same time, the radial extension dimension of the end cap 219 can be appropriately increased to further simplify the disassembly and assembly process of the guide ring 218, which is beneficial to later maintenance, and makes the working hours consumed short and the maintenance cost low.

[0138] In some embodiments, in combination with Figure 3 and Figure 4 as shown, at least part of the piston rod 221 extends into the inner cavity a through the opening. A seal 290 is provided between the piston rod 221 and the housing assembly 210. The seal 290 is configured to achieve the sealing fit between the piston rod 221 and the housing assembly 210. The sealing performance of the inner cavity a can be ensured, which is beneficial to ensuring the relative movement of the piston head 222 and the housing assembly 210 and improving the working performance of the second damping device 200.

[0139] In addition, the seal 290 can also seal the hydraulic oil inside the inner cavity a and isolate media such as water, air, oil, and dust outside the system, to a certain extent preventing external media from entering the inner cavity a.

[0140] Optionally, the seal 290 is provided on the housing assembly 210 and is movably engaged with the piston rod 221. While ensuring the sealing effect between the piston rod 221 and the housing assembly 210 by using the seal 290, it can also prevent the seal 290 from hindering the relative movement between the housing assembly 210 and the piston rod 221 to a certain extent, thereby ensuring the working performance of the second damping device 200.

[0141] In some embodiments, as shown in combination with Figure 3 and Figure 4 the second damping device 200 further includes a cage 270. The seal 290 is provided between the end cap 219 and the cage 270 to support the seal 290 by the cooperation of the end cap 219 and the cage 270, reducing the difficulty of fixing the seal 290 and improving the position stability of the seal 290, thereby ensuring the working performance of the seal 290.

[0142] In some embodiments, as shown in combination with Figure 3 and Figure 4 the second damping device 200 includes a limiting assembly 260. The limiting assembly 260 is configured to limit the relative movement range between the piston assembly 220 and the housing assembly 210. That is to say, during the relative movement of the piston assembly 220 and the housing assembly 210, the limiting assembly 260 can limit the relative movement range between the piston assembly 220 and the housing assembly 210, so that the piston assembly 220 and the housing assembly 210 can perform relative movement within a predetermined route, ensuring the position accuracy of the piston assembly 220 and the housing assembly 210 during relative movement, to ensure the working performance of the second damping device 200.

[0143] In some embodiments, as shown in combination with Figure 3 and Figure 4 the limiting assembly 260 includes a first limiting member and a second limiting member 262. The first limiting member and the second limiting member 262 are spaced apart. In the moving direction of the piston assembly 220, the first limiting member is provided between the end cap 219 and the outer shell 112, and the second limiting member 262 is provided between the end cap 219 and the piston head 222. The first limiting member and the second limiting member 262 cooperate to limit the relative movement range between the piston assembly 220 and the housing assembly 210. Thereby, the limiting assembly 260 is used to limit the relative movement range between the piston assembly 220 and the housing assembly 210, so that the piston assembly 220 and the housing assembly 210 can perform relative movement within a predetermined route, ensuring the position accuracy of the piston assembly 220 and the housing assembly 210 during relative movement, and thus ensuring the working performance of the second damping device 200.

[0144] In a specific example, in combination with Figure 3 and Figure 4 as shown, in the moving direction of the piston assembly 220, the first limiting member is provided on the side wall of the end cover 219 facing the outer shell 112 or on the side wall of the outer shell 112 facing the end cover 219, and the second limiting member 262 is provided on the side wall of the piston head 222 facing the end cover 219. In this way, when the housing assembly 210 moves upward relative to the outer shell 112 and reaches the limit position, the first limiting member can be used to limit the continuous upward movement of the housing assembly 210, so as to achieve the purpose of limiting the moving range of the housing assembly 210; when the housing assembly 210 moves downward relative to the outer shell 112, the end cover 219 can abut against the second limiting member 262. At this time, the second limiting member 262 is used to limit the continuous downward movement of the housing assembly 210, so as to achieve the purpose of limiting the moving range of the housing assembly 210, thereby achieving the purpose of using the first limiting member and the second limiting member 262 to cooperate to limit the moving ranges of the piston assembly 220 and the housing assembly 210.

[0145] In some embodiments, both the first limiting member and the second limiting member 262 are formed as elastic members, so that the first limiting member and the second limiting member 262 can play a role of limiting and buffering during the relative movement of the piston assembly 220 and the housing assembly 210. While ensuring the position accuracy of the piston assembly 220 and the housing assembly 210 during relative movement, it can also prevent the piston assembly 220 and the housing assembly 210 from hitting each other and causing damage, and extend the service lives of the piston assembly 220 and the housing assembly 210.

[0146] In a specific example, the first limiting member and the second limiting member 262 can be non-metallic materials such as rubber and polyurethane, or metallic materials such as metal springs.

[0147] In some embodiments, a first communication hole and a second communication hole that communicate the first chamber 230 and the second chamber 240 are provided on the piston head 222. The first communication hole is configured to convey the pressure medium in the second chamber 240 to the first chamber 230, and the second communication hole is configured to convey the pressure medium in the first chamber 230 to the second chamber 240. That is to say, the first communication hole and the second communication hole are configured to have different flow guiding directions. In this way, not only can the first chamber 230 and the second chamber 240 be communicated, but also when the piston head 222 slides relative to the housing assembly 210 and the volume of the first chamber 230 decreases, the pressure medium in the first chamber 230 can flow into the second chamber 240, and when the piston head 222 slides relative to the housing assembly 210 and the volume of the first chamber 230 increases, the pressure medium in the second chamber 240 can flow into the first chamber 230. The pressure medium generates a damping force when flowing, so that the second damping device 200 can filter out high-frequency and low-amplitude vibrations and ensure the working performance of the second damping device 200.

[0148] In some embodiments, check valves are provided in the first communication hole and the second communication hole, and the check valves in the first communication hole and the check valves in the second communication hole have different flow guiding directions, so that the flow guiding directions of the first communication hole and the second communication hole are different to ensure the flow guiding performance of the first communication hole and the second communication hole.

[0149] In a specific example, the check valve in the first communication hole is used to guide the hydraulic oil in the second chamber 240 into the first chamber 230, and the check valve in the second communication hole is used to guide the hydraulic oil in the first chamber 230 into the second chamber 240, so that the flow guiding directions of the first communication hole and the second communication hole are different to ensure the flow guiding performance of the first communication hole and the second communication hole.

[0150] In some other embodiments, the first connecting hole and the second connecting hole may be arranged at intervals in the radial direction of the piston head 222 (not shown in the example figure), and a first valve plate is provided on the side of the piston head 222 facing the second chamber 240, the first valve plate covers the second connecting hole and avoids the first connecting hole, and a second valve plate is provided on the side of the piston head 222 facing the first chamber 230, the second valve plate covers the first connecting hole and is provided with an avoidance hole for avoiding the second connecting hole. When the piston head 222 slides relative to the housing assembly 210 and reduces the volume of the first chamber 230, part of the hydraulic oil in the first chamber 230 can flow to the second connecting hole, and the second connecting hole The hydraulic oil in the hole can push open the first valve plate, so that part of the hydraulic oil in the first chamber 230 can flow into the second chamber 240; when the piston head 222 slides relative to the housing assembly 210 and increases the volume of the first chamber 230, part of the hydraulic oil in the second chamber 240 can flow to the first connecting hole, and the hydraulic oil in the first connecting hole can push open the second valve plate, so that part of the hydraulic oil in the second chamber 240 can flow into the first chamber 230, and make the diversion directions of the first connecting hole and the second connecting hole different, thereby ensuring the diversion performance of the first connecting hole and the second connecting hole, thereby ensuring the working performance of the second damping device 200.

[0151] In the process of the hydraulic oil pushing open the first valve plate and the second valve plate, the hydraulic oil can generate a damping force, so that the second damping device 200 can filter out high-frequency and low-amplitude vibrations, thereby ensuring the working performance of the second damping device 200.

[0152] In some embodiments, the first valve plate and the second valve plate are connected to the piston head 222 by a first connecting bolt. While realizing the arrangement of the first valve plate and the second valve plate on the piston head 222, the difficulty of fixing the first valve plate and the second valve plate can also be reduced, thereby ensuring the working performance of the first valve plate and the second valve plate, so that the diversion directions of the first connecting hole and the second connecting hole are different.

[0153] In some embodiments, the first valve plate and the second valve plate are made of elastic material (such as rubber), so that when the first valve plate and the second valve plate are impacted by hydraulic oil, the first valve plate and the second valve plate can effectively undergo elastic deformation, thereby making the first connecting hole or the second connecting hole conductive, and when the impact force disappears, the first valve plate and the second valve plate can also restore their original shape to block the first connecting hole or the second connecting hole.

[0154] In some embodiments, in combination Figure 3 , Figure 4 and Figure 5As shown, the bottom valve assembly 214 is provided with a third communication hole 2141 and a fourth communication hole 2142 that communicate the outer cavity 213 and the first chamber 230. The third communication hole 2141 is configured to convey the pressure medium in the first chamber 230 to the outer cavity 213 to extract the pressure medium in the first chamber 230, and the fourth communication hole 2142 is configured to convey the pressure medium in the outer cavity 213 to the first chamber 230 to supply the pressure medium to the first chamber 230. That is to say, the third communication hole 2141 and the fourth communication hole 2142 are configured to have different flow guiding directions. In this way, while the first chamber 230 and the outer cavity 213 are communicated, when the piston head 222 slides relative to the housing assembly 210 and the volume of the first chamber 230 decreases, the hydraulic oil in the first chamber 230 can flow through the bottom valve assembly 214 into the outer cavity 213, and when the piston head 222 slides relative to the housing assembly 210 and the volume of the first chamber 230 increases, the hydraulic oil in the outer cavity 213 can flow through the bottom valve assembly 214 into the first chamber 230, so that the volume of the first chamber 230 can effectively change, and further ensure the working performance of the second damping device 200.

[0155] In the description of the present utility model, the features defined as "first", "second", "third", and "fourth" may explicitly or implicitly include one or more of such features, which are used to distinguish and describe the features, without order or importance.

[0156] In some embodiments, check valves are provided in the third communication hole 2141 and the fourth communication hole 2142, and the check valves in the third communication hole 2141 and the check valves in the fourth communication hole 2142 have different flow guiding directions, so that the third communication hole 2141 and the fourth communication hole 2142 have different flow guiding directions to ensure the flow guiding performance of the third communication hole 2141 and the fourth communication hole 2142.

[0157] In a specific example, the check valve in the third communication hole 2141 is used to guide the hydraulic oil in the first chamber 230 into the outer cavity 213, and the check valve in the fourth communication hole 2142 is used to guide the hydraulic oil in the outer cavity 213 into the first chamber 230, so that the third communication hole 2141 and the fourth communication hole 2142 have different flow guiding directions and ensure the flow guiding performance of the third communication hole 2141 and the fourth communication hole 2142.

[0158] In some other embodiments, in combination with Figure 3 and Figure 5As shown, the third connecting hole 2141 and the fourth connecting hole 2142 are arranged at intervals in the radial direction of the bottom valve assembly 214, and a third valve plate 215 is provided on the side of the bottom valve assembly 214 facing the first chamber 230, and the third valve plate 215 covers the third connecting hole 2141 and avoids the fourth connecting hole 2142, and a fourth valve plate 216 is provided on the side of the bottom valve assembly 214 away from the first chamber 230, and the fourth valve plate 216 covers the fourth connecting hole 2142 and is provided with an avoidance hole for avoiding the third connecting hole 2141. When the piston head 222 slides relative to the housing assembly 210 and reduces the volume of the first chamber 230, part of the hydraulic oil in the first chamber 230 can flow to the third connecting hole 2141, and the third connecting hole The hydraulic oil in 2141 can push open the third valve plate 215, so that part of the hydraulic oil in the first chamber 230 can flow into the outer chamber 213; when the piston head 222 slides relative to the housing assembly 210 and increases the volume of the first chamber 230, part of the hydraulic oil in the outer chamber 213 can flow to the fourth connecting hole 2142, and the hydraulic oil in the fourth connecting hole 2142 can push open the fourth valve plate 216, so that part of the hydraulic oil in the outer chamber 213 can flow into the first chamber 230, and make the third connecting hole 2141 and the fourth connecting hole 2142 have different diversion directions, thereby ensuring the diversion performance of the third connecting hole 2141 and the fourth connecting hole 2142, thereby ensuring the working performance of the second damping device 200.

[0159] In the process of the hydraulic oil pushing open the third valve plate 215 and the fourth valve plate 216 , the hydraulic oil can generate a damping force, so that the second damping device 200 can filter out high-frequency and low-amplitude vibrations, thereby ensuring the working performance of the second damping device 200 .

[0160] In some embodiments, Figure 5 As shown, the third valve disc 215 and the fourth valve disc 216 are connected to the bottom valve assembly 214 by the second connecting bolt 217. While realizing the third valve disc 215 and the fourth valve disc 216 being arranged on the bottom valve assembly 214, the difficulty of fixing the third valve disc 215 and the fourth valve disc 216 can be reduced, thereby ensuring the working performance of the third valve disc 215 and the fourth valve disc 216, so that the diversion directions of the third connecting hole 2141 and the fourth connecting hole 2142 are different.

[0161] In some embodiments, the third valve disc 215 and the fourth valve disc 216 are made of elastic material (such as rubber), so that when the third valve disc 215 and the fourth valve disc 216 are impacted by hydraulic oil, the third valve disc 215 and the fourth valve disc 216 can effectively undergo elastic deformation, thereby making the third connecting hole 2141 or the fourth connecting hole 2142 conductive, and when the impact force disappears, the third valve disc 215 and the fourth valve disc 216 can also restore their original shape to block the third connecting hole 2141 or the fourth connecting hole 2142.

[0162] In some embodiments, as shown in Figure 1 , Figure 3 and Figure 4 , the actuator assembly 1000 further includes a connecting arm 300. The first cylinder 211 is adapted to be connected to the wheel end through the connecting arm 300, so as to achieve the mating connection between the actuator assembly 1000 and the wheel end, reduce the difficulty of assembling and connecting the actuator assembly 1000 to the vehicle, and facilitate the use of the actuator assembly 1000 to improve the comfort of the vehicle.

[0163] In some embodiments, as shown in Figure 3 and Figure 4 , the first cylinder 211 is provided with a connecting protrusion 2112. The connecting arm 300 is fixedly connected to the connecting protrusion 2112, so as to achieve the fixed connection between the connecting arm 300 and the first cylinder 211, thereby realizing the mating connection between the actuator assembly 1000 and the wheel end and reducing the connection difficulty.

[0164] Wherein, the fixed connection between the connecting arm 300 and the connecting protrusion 2112 can be a threaded connection, or an adhesive connection, a snap connection, etc.

[0165] Through the above arrangement, when the actuator assembly 1000 is subjected to road surface excitation, the road surface excitation is first transmitted from the wheel to the connecting arm 300, and then transmitted from the connecting arm 300 to the second damping device 200. When the road surface excitation is transmitted to the second damping device 200, the piston head 222 of the second damping device 200 can make a relative movement with respect to the housing assembly 210, so as to absorb part of the high-frequency vibration and achieve the purpose of vibration reduction, thereby ensuring the working performance of the second damping device 200.

[0166] In some embodiments, the actuator assembly 1000 further includes an upper connection end, and the upper connection end connects the first damping device 100 and the vehicle body end, thereby realizing the connection of the actuator assembly 1000 between the wheel end and the vehicle body end of the vehicle, reducing the difficulty of assembling and connecting the actuator assembly 1000 to the vehicle, and facilitating the use of the actuator assembly 1000 to improve the comfort of the vehicle.

[0167] In a specific example, during the running of the vehicle, when the road surface excitation triggers the vibration of the suspension assembly, the connecting arm 300 has a relative movement with respect to the piston head 222 of the second damping device 200. At this time, the hydraulic oil flows between the first chamber 230, the second chamber 240 and the outer chamber 213, thereby generating a damping force.

[0168] Specifically: when the connecting arm 300 moves towards the direction close to the piston head 222, the volume of the first chamber 230 decreases, the oil pressure increases, and the hydraulic oil in the first chamber 230 flows to the second chamber 240 and the outer chamber 213 respectively; when the connecting arm 300 moves towards the direction away from the piston head 222, the volume of the first chamber 230 increases. At this time, the hydraulic oil in the second chamber 240 and the outer chamber 213 can flow to the first chamber 230, and buffering is carried out by relying on the damping force generated by the hydraulic oil flowing through the piston head 222 and the bottom valve assembly 214. High-frequency and low-amplitude vibrations can be filtered out, and the remaining vibrations (such as low-frequency and high-amplitude, low-frequency and low-amplitude vibrations) are transmitted to the first damping device 100 through the second damping device 200. By relying on the attenuation force generated by the first damping device 100 to inhibit the straight-line movement of the ball screw assembly, active force is provided to inhibit vehicle body vibrations.

[0169] Specifically: when the damping force can offset the force input by road surface vibrations, the piston head 222 is stationary relative to the ground. When the maximum damping force is less than the force input by road surface vibrations or the road surface amplitude is greater than the maximum stroke of the second damping device 200, the piston head 222 will generate axial movement. However, since the piston head 222 is rigidly connected to the moving component 110 on the ball screw assembly, this means that when the second damping device 200 cannot absorb the vibrations brought by road surface excitation, the moving component 110 on the ball screw assembly will move, that is, the first damping device 100 generates axial movement.

[0170] It should be noted that the axial movement of the first damping device 100 is mainly realized through the driving part 130. The driving part 130 is energized to drive the screw shaft to rotate, and the screw shaft drives the moving component 110 to move, so that the first damping device 100 generates axial movement.

[0171] In summary, for the actuator assembly 1000 of the present application, the vibrations brought by road surface excitation are first absorbed by the second damping device 200, and the redundant vibrations are absorbed by the first damping device 100. Among them, when the road surface excitation brings high-frequency vibrations, the first damping device 100 cannot respond quickly, while the second damping device 200 can respond, which means that the series assembly of the second damping device 200 and the first damping device 100 has a wider frequency response bandwidth. In addition, it also shows that the second damping device 200 can reduce the working burden of the first damping device 100, ensuring the service life and working accuracy of the actuator assembly 1000.

[0172] In some embodiments, the actuator assembly 1000 has a first actuation mode. In the first actuation mode, the wheel is subjected to road surface excitation, and the first damping device 100 and the second damping device 200 are jointly used to suppress wheel vibration. That is to say, in the first actuation mode, when the wheel is subjected to road surface excitation, both the first damping device 100 and the second damping device 200 output damping forces for resisting road surface vibration, thereby improving the vehicle's ability to absorb vibration.

[0173] Specifically, in the first actuation mode, the way the second damping device 200 suppresses wheel vibration is as follows: during the driving of the vehicle, when the wheel is subjected to road surface excitation, the vibration of the wheel can be transmitted to the connecting arm 300. Since the connecting arm 300 is connected to the first cylinder body 211 to drive the first cylinder body 211 to move, a relative movement is generated between the piston head 222 and the second cylinder body 212. At this time, the hydraulic oil flows between the first chamber 230, the second chamber 240 and the outer chamber 213, so that the second damping device 200 generates a hydraulic damping force, and the generated hydraulic damping force suppresses the vibration of the connecting arm 300, and further suppresses the vehicle body vibration.

[0174] In the first actuation mode, the first damping device 100 is in a passive working state. The way the first damping device 100 suppresses wheel vibration is as follows: during the driving of the vehicle, when the wheel is subjected to road surface excitation, the vibration of the wheel can be transmitted to the outer shell 112. Since the outer shell 112 is fixedly connected to the conversion member 111, the conversion member 111 will also perform a linear movement, driving the rotating member 120 to have a rotation tendency. Since the rotating member 120 is connected to the driving member 130, the driving member 130 has a rotation tendency. However, since the driving member 130 is provided with a stator and a rotor, and there is a magnetic resistance between the stator and the rotor, the magnetic resistance of the driving member 130 prevents the rotating member 120 from rotating, thereby preventing the linear movement of the conversion member 111, achieving the prevention of the linear movement of the outer shell 112, and further suppressing the vehicle body vibration.

[0175] In some embodiments, the actuator assembly 1000 has a second actuation mode. In the second actuation mode, the driving member 130 actively rotates, driving the rotating member 120 to convert the rotational motion of the driving member 130 into a linear motion of the outer shell 112, and further driving the wheel to perform a linear motion.

[0176] It can be understood that in the second actuation mode, when the vehicle's preview system detects undulations on the road surface ahead, the driving member 130 actively rotates, driving the rotating member 120 to rotate, thereby driving the conversion member 111 to perform a linear motion in a straight line direction. The conversion member 111 drives the outer shell 112 to perform a linear motion, thereby driving the wheel to perform a linear motion, and further realizing the real-time control of the wheel height to meet the real-time demand for vehicle body height adjustment.

[0177] Specifically, when the preview system of the vehicle detects undulations on the road surface ahead, when the driving member 130 recognizes the clockwise rotation trend of the rotating member 120, the driving member 130 actively applies a counterclockwise rotational torque to suppress the rotation trend of the rotating member 120; when the driving member 130 recognizes the counterclockwise rotation trend of the rotating member 120, the driving member 130 actively applies a clockwise rotational torque to suppress the rotation trend of the rotating member 120.

[0178] Specifically, in the second actuation mode, the way the first damping device 100 suppresses wheel vibration is as follows: when the wheel is jolted, the force exerted by the wheel on the connecting arm 300 is converted into a rotational driving force on the driving member 130 through the second damping device 200, the moving assembly 110, and the rotating member 120. The driving member 130 rotates. The control device is connected to the driving member 130. The control device obtains the current rotation parameters of the driving member 130 and obtains the target rotation parameters based on the aforementioned current rotation parameters. Then, the control device controls the driving member 130 to operate with the target rotation parameters, generating a force in this state. This force is then converted into a damping force on the connecting arm 300 through the rotating member 120, the moving assembly 110, and the second damping device 200. The damping force suppresses the vibration of the vehicle body, achieving the effect of vibration reduction and ensuring the smooth driving of the vehicle.

[0179] Among them, the greater the jolt received by the wheel, the greater the displacement change of the moving assembly 110, the faster the rotation speed of the driving member 130, the greater the electromagnetic torque generated by the driving member 130, the greater the corresponding damping force generated, and the greater the degree of suppressing vehicle vibration.

[0180] Specifically, when the driving member 130 is powered on to make the moving assembly 110 perform active movement, the rotation speed and direction of the mover element of the driving member 130 are controlled by controlling the magnitude and direction of the current, generating a rotational torque that suppresses rotational movement, suppressing the rotation of the rotating member 120, suppressing road surface excitation, realizing active tuning control of the vibration system. At the same time, according to the vehicle body height sensor, when the vehicle body height is too low, the driving member 130 is controlled to output force to prevent the actuator assembly 1000 from hitting the limit block.

[0181] It should be noted that in the second actuation mode, since the second damping device 200 and the first damping device 100 are in series, the piston head 222 of the second damping device 200 will move up and down, enabling the pressure medium to flow between the first chamber 230 and the second chamber 240, generating a damping force. The damping force generated by the second damping device 200 is opposite to the driving force, that is, the damping force of the actuator assembly 1000 will be weakened. At this time, the moving assembly 110 needs to overcome the damping force of the second damping device 200 to complete the active movement.

[0182] The suspension system of the embodiment of the present invention will be described below.

[0183] A suspension system according to an embodiment of the present utility model includes: an actuator assembly 1000.

[0184] Wherein, the actuator assembly 1000 is the aforementioned actuator assembly 1000, and the specific structure of the actuator assembly 1000 will not be specifically described herein.

[0185] As can be seen from the above structure, the suspension system of the embodiment of the present utility model adopts the aforementioned actuator assembly 1000 to make up for the deficiency of the response bandwidth of the suspension system in the prior art, thereby ensuring the working performance of the suspension system.

[0186] The vehicle of the embodiment of the present utility model will be described below.

[0187] A vehicle according to an embodiment of the present utility model includes: a suspension system.

[0188] Wherein, the suspension system is the aforementioned suspension system, and the specific structure of the suspension system will not be specifically described herein.

[0189] As can be seen from the above structure, the vehicle of the embodiment of the present utility model can improve the comfort of the vehicle by adopting the aforementioned suspension system, thereby improving the driving and riding experience.

[0190] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection" and "connection" 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 components. 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.

[0191] The other components of the actuator assembly 1000, the suspension system and the vehicle according to the embodiment of the present utility model are known to those of ordinary skill in the art and will not be described in detail here.

[0192] In the description of this specification, the descriptions referring to the terms "embodiment", "example" and the like mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0193] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. An actuator assembly, characterized in that, Comprising: A first damping device (100), the first damping device (100) including a reciprocating movable component (110); A second damping device (200), the second damping device (200) including a piston component (220) and a housing component (210). In the moving direction of the movable component (110), the piston component (220) is connected to the axial end of the movable component (110). The housing component (210) includes a first cylinder body (211), a second cylinder body (212), and a bottom valve component (214). The interior of the second cylinder body (212) is hollow to define an inner cavity (a). At least part of the piston component (220) is arranged in the inner cavity (a) and is movably matched with the second cylinder body (212) relatively to divide the inner cavity (a) into a first chamber (230) and a second chamber (240) that communicate with each other. The first cylinder body (211) is sleeved on the outer periphery of the second cylinder body (212) and is spaced apart from the second cylinder body (212) in the radial direction. An outer cavity (213) is defined between the first cylinder body (211) and the second cylinder body (212). The first cylinder body (211) is adapted to be connected to the wheel end of a vehicle. The bottom valve component (214) is connected to one axial end of the second cylinder body (212) and is in limiting cooperation with the first cylinder body (211) to limit the radial displacement of the second cylinder body (212). The bottom valve component (214) is configured to communicate the first chamber (230) and the outer cavity (213) under pressure to supply a pressure medium to the first chamber (230) or extract the pressure medium in the first chamber (230).

2. The actuator assembly according to claim 1, wherein, One of the bottom valve component (214) and the bottom wall of the first cylinder body (211) is provided with a limiting protrusion (2143), and the other is provided with a limiting groove (2111). The limiting protrusion (2143) is in limiting cooperation in the limiting groove (2111).

3. The actuator assembly according to claim 1, characterized in that, The movable component (110) includes a conversion member (111) and a housing (112). The housing (112) is fixedly connected to the conversion member (111). The first damping device (100) includes a driving member (130) and a rotating member (120) that cooperates with the conversion member (111). The driving member (130) is used to drive the rotating member (120) to rotate, and the conversion member (111) is used to convert the rotation of the rotating member (120) into the movement of the conversion member (111).

4. The actuator assembly according to claim 3, wherein, The piston component (220) includes a piston rod (221) and a piston head (222) provided on the piston rod (221). The piston rod (221) is connected to the housing (112). The piston head (222) is arranged in the inner cavity (a) and is slidably matched with the inner wall of the second cylinder body (212) to define the first chamber (230) and the second chamber (240).

5. The actuator assembly according to claim 4, characterized in that, The piston rod (221) and the housing (112) are an integral part.

6. The actuator assembly according to claim 4, characterized in that, The housing assembly (210) further includes an end cap (219) connected to one end of the first cylinder (211) facing the outer housing (112). A guide ring (218) is provided on the end cap (219), and at least a part of the guide ring (218) is sleeved on the outer periphery of the outer housing (112) and is in sliding fit with the outer housing (112).

7. The actuator assembly according to claim 6, characterized in that, A sliding bearing (400) is provided between the guide ring (218) and the outer peripheral wall of the outer housing (112).

8. The actuator assembly according to claim 6, wherein The second damping device (200) includes a limiting assembly (260) configured to limit the relative movement range between the piston assembly (220) and the housing assembly (210).

9. The actuator assembly according to claim 8, characterized in that, The limiting assembly (260) includes a first limiting member and a second limiting member (262) arranged at intervals. In the moving direction of the piston assembly (220), the first limiting member is arranged between the end cap (219) and the outer housing (112), and the second limiting member (262) is arranged between the end cap (219) and the piston head (222). The first limiting member and the second limiting member (262) cooperate to limit the relative movement range between the piston assembly (220) and the housing assembly (210).

10. The actuator assembly according to claim 9, wherein, Both the first limiting member and the second limiting member (262) are formed as elastic members.

11. The actuator assembly according to claim 4, wherein, The piston head (222) is provided with a first communication hole and a second communication hole for communicating the first chamber (230) and the second chamber (240). The first communication hole is configured to convey the pressure medium in the second chamber (240) to the first chamber (230), and the second communication hole is configured to convey the pressure medium in the first chamber (230) to the second chamber (240).

12. The actuator assembly according to claim 1, characterized in that, The bottom valve assembly (214) is provided with a third communication hole (2141) and a fourth communication hole (2142) for communicating the outer chamber (213) and the first chamber (230). The third communication hole (2141) is configured to convey the pressure medium in the first chamber (230) to the outer chamber (213) to extract the pressure medium in the first chamber (230), and the fourth communication hole (2142) is configured to convey the pressure medium in the outer chamber (213) to the first chamber (230) to supply the pressure medium to the first chamber (230).

13. The actuator assembly according to claim 1, wherein It further includes a connecting arm (300), and the first cylinder (211) is adapted to be connected to the wheel end through the connecting arm (300).

14. A suspension system, characterized in that, It includes an actuator assembly according to any one of claims 1-13.

15. A vehicle, characterized in that, It includes a suspension system according to claim 14.

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