Actuator, suspension system and vehicle

Abstract

This utility model discloses an actuator, a suspension system, and a vehicle, relating to the field of vehicle technology, and aims to solve the problem of how to improve the stability of a suspension system. The actuator includes a first component, a second component, and a transmission component connected to the second component. The transmission component is used to drive the second component to move relative to the first component. A first limiting structure is provided between the transmission component and the second component to prevent relative rotation between the transmission component and the second component.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and more particularly to an actuator, suspension system, and vehicle. Background Technology

[0002] The vehicle's suspension system connects the body and wheels, cushioning the vehicle and improving the comfort of the driver and passengers.

[0003] A suspension system typically includes a drive assembly, a transmission assembly, and a moving assembly. The transmission assembly converts the rotational motion output by the drive assembly into linear motion, thereby allowing the length of the moving assembly to be adjusted to cushion shocks and vibrations to the vehicle.

[0004] However, in the existing technology, the impact and vibration of the vehicle during the movement will cause swaying between the transmission components and moving components, resulting in structural instability and reduced transmission efficiency. Utility Model Content

[0005] The purpose of this application is to provide an actuator, suspension system, and vehicle that aims to solve the problem of how to improve the stability of the suspension system.

[0006] In a first aspect, this application provides an actuator comprising a first component, a second component, and a transmission component connected to the second component, the transmission component being used to drive the second component to move relative to the first component. A first limiting structure is provided between the transmission component and the second component, the first limiting structure preventing relative rotation between the transmission component and the second component.

[0007] When a vehicle is traveling on a bumpy road, the wheels will bounce as they come into contact with the road surface. The vehicle's actuators can adjust the distance between the vehicle body and the wheels by moving the first component relative to the second component, thereby cushioning the vehicle body, keeping it relatively stable, and improving the user's driving experience.

[0008] Since the relative movement of the second component and the first component can adjust the distance between the vehicle body and the wheels, the second component moves linearly relative to the first component. The first limiting structure prevents the transmission component from rotating relative to the second component, thereby reducing the sway between the transmission component and the second component and improving the stability of the actuator. At the same time, the first limiting structure can reduce the additional stress generated by the relative rotation between the transmission component and the second component, thereby improving the transmission efficiency of the transmission component.

[0009] Optionally, the transmission assembly includes a first transmission member and a second transmission member, the first transmission member cooperating with the second transmission member to drive the second transmission member to move in a straight line; a first limiting structure is disposed between the second transmission member and the second assembly, and the first transmission member and the second transmission member move relative to each other.

[0010] Optionally, the first transmission member and the second transmission member rotate relative to each other, and the first transmission member and the second transmission member move linearly relative to each other.

[0011] Optionally, the first transmission component includes a lead screw, and the second transmission component includes a lead nut.

[0012] Optionally, the second component includes a piston that is movable relative to the first component; the piston is disposed around the second transmission member, and a first limiting structure is connected between the second transmission member and the piston.

[0013] Optionally, at least a portion of the second component is fitted onto the second transmission member; the first limiting structure includes a limiting key, a first keyway disposed on the outer peripheral wall of the second transmission member, and a second keyway disposed on the inner peripheral wall of the second component, wherein the limiting key is accommodated within the first keyway and the second keyway to prevent the second transmission member from rotating relative to the second component.

[0014] Optionally, the inner bore of the piston forms a first opening at one end along the axial direction of the piston; the second assembly also includes a blocking member fixedly connected to the piston, the blocking member and the first opening being located on the same side of the second transmission member along the axial direction of the piston, the blocking member being used to prevent the second transmission member from disengaging from the piston through the first opening.

[0015] Optionally, the second component also includes a piston rod located on the side of the second transmission member opposite to the first opening, with a portion of the piston rod located in the inner hole and fixedly connected to the piston.

[0016] Optionally, a clearance space is provided inside the piston rod to avoid the first transmission component.

[0017] Optionally, the inner hole includes a first inner hole section and a second inner hole section, the cross-sectional size of the first inner hole section is larger than the cross-sectional size of the second inner hole section; the second transmission member is disposed in the first inner hole section, and the first opening is disposed at one end of the first inner hole section away from the second inner hole section; a portion of the piston rod is located in the second inner hole section.

[0018] Optionally, the piston rod is threaded to the piston.

[0019] Optionally, at least a portion of the piston is provided with a first internal thread, and at least a portion of the second transmission member is provided with a first external thread that mates with the first internal thread.

[0020] Optionally, the first transmission component includes a lead screw, and the second transmission component includes a lead nut; the pitch of the first internal thread and the first external thread is 1 / 2 to 4 / 5 of the pitch of the first transmission component.

[0021] Optionally, the first internal thread and the first external thread are bonded together with adhesive.

[0022] Optionally, along the axial direction of the piston, one end of the piston is a first end, and the second assembly also includes a piston rod connected to the first end of the piston; a first internal thread is provided at the first end of the piston; the second transmission member includes a second end, which is housed within the first end, and a first external thread is provided on the outer peripheral wall of the second end.

[0023] Optionally, the piston includes a third inner bore section and a fourth inner bore section connected to each other, the cross-sectional size of the third inner bore section being smaller than that of the fourth inner bore section; the first internal thread is provided in the third inner bore section.

[0024] Optionally, the piston may also include a fifth inner bore section, which is connected to the end of the fourth inner bore section away from the third inner bore section, and the cross-sectional size of the fifth inner bore section is larger than that of the fourth inner bore section.

[0025] Optionally, a portion of the piston rod is housed within the second end and fixedly connected to the second transmission member.

[0026] Optionally, the second end is provided with a second internal thread, and at least a portion of the piston rod is provided with a second external thread that mates with the second internal thread, so that the piston rod is fixedly connected to the second transmission member.

[0027] Optionally, the second internal thread has the opposite direction of rotation to the first internal thread.

[0028] Optionally, the pitch of the second internal thread and the second external thread is 1 / 2 to 4 / 5 of the pitch of the first transmission component.

[0029] Optionally, the first component has a receiving chamber, and the second component is housed in the receiving chamber and slides relative to the inner wall of the receiving chamber.

[0030] Optionally, the second component also includes a seal disposed on the surface of the piston facing the inner wall of the receiving chamber.

[0031] Optionally, the second component also includes a buffer disposed at at least one end of the piston along the axial direction of the piston.

[0032] Optionally, the actuator may also include a second limiting structure, which is disposed between the first transmission member and the first assembly.

[0033] Optionally, the actuator also includes a bearing, the outer ring of which is connected to the first component, and the inner ring of which is connected to the first transmission component; the second limiting structure includes a bearing retaining ring, the bearing retaining ring and the bearing are arranged in the same direction as the piston axis, and the bearing retaining ring abuts against the outer ring of the bearing; the bearing retaining ring is fixedly connected to the first component.

[0034] Optionally, the outer wall surface of the bearing pressure ring is provided with a third external thread, and the inner wall surface of the first component connected to the bearing pressure ring is provided with a third internal thread, with the third external thread engaging with the third internal thread.

[0035] Optionally, the second limiting structure also includes a bushing and a limiting nut, both of which are located between the first transmission component and the bearing.

[0036] Optionally, the bushing and the limiting nut are arranged along the axial direction of the piston; the bushing includes a first part and a second part connected to each other, the first part is located between the bearing and the first transmission member, and one end of the second part abuts against one end of the inner ring of the bearing; the outer surface of the first transmission member is provided with a stepped surface, and the other end of the second part abuts against the stepped surface; the limiting nut is threadedly connected to the first transmission member, and the end face of the limiting nut abuts against the other end of the inner ring of the bearing.

[0037] Optionally, the actuator may further include a drive assembly, which is connected to the first transmission member to drive the first transmission member to rotate.

[0038] Optionally, the actuator may also include a speed change assembly connected between the drive assembly and the first transmission member.

[0039] Optionally, the transmission assembly includes a first gear and a second gear connected by a transmission, wherein the first gear is coaxially arranged with the first transmission member and the second gear is coaxially arranged with the output shaft of the drive assembly.

[0040] Optionally, the first gear is connected to the first transmission component via a spline connection, and / or the second gear is connected to the output shaft of the drive assembly via a spline connection.

[0041] Optionally, the actuator may also include a torque limiter connected between the first transmission member and the first gear to limit the torque transmitted from the first transmission member to the first gear.

[0042] Optionally, the actuator may also include a damping device, wherein the first component has a receiving chamber that is connected to the damping device to allow buffer oil to flow between the receiving chamber and the damping device.

[0043] Secondly, this application also provides a suspension system, which includes the actuators provided in any of the above embodiments.

[0044] Optionally, the suspension system may also include a spring, one end of which is connected to the first component, and the other end of which is adapted to be connected to the vehicle body or a wheel.

[0045] Thirdly, this application also provides a vehicle that includes the actuator provided in any of the above embodiments and / or the suspension system provided in any of the above embodiments.

[0046] Optionally, the vehicle also includes a body and wheels, with one of the housing and movable components connected to the body and the other of the housing and movable components connected to the wheels. Attached Figure Description

[0047] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0048] Figure 1 A schematic diagram of the structure of a vehicle provided in an embodiment of this application;

[0049] Figure 2 This is a schematic diagram of a suspension system provided in an embodiment of this application;

[0050] Figure 3 for Figure 2 The diagram shows a cross-sectional view of the suspension system.

[0051] Figure 4 A partial enlarged view of the first limiting structure provided in the first embodiment of this application;

[0052] Figure 5 for Figure 4 The diagram shows the structure of the first limiting structure.

[0053] Figure 6 A partially enlarged view of the first limiting structure provided in the second embodiment of this application;

[0054] Figure 7 This is a partially enlarged view of a second limiting structure provided in an embodiment of this application.

[0055] Figure label:

[0056] 100. Vehicle; 10. Suspension system; 20. Vehicle body; 30. Wheel;

[0057] 01. Actuator; 02. Spring;

[0058] 1. First component;

[0059] 2. Second component; 21. Piston; 211. First opening; 212. First inner bore section; 213. Second inner bore section; 214. Third inner bore section; 215. Fourth inner bore section; 216. Fifth inner bore section; 217. First end; 2171. First internal thread; 22. Blocking element; 23. Piston rod; 231. Clearance space; 24. Seal; 25. Buffer element;

[0060] 3. Transmission assembly; 31. First transmission component; 32. Second transmission component; 321. Second end; 3211. First external thread;

[0061] 4. First limiting structure; 41. Limit key; 42. First keyway; 43. Second keyway;

[0062] 5. Second limiting structure; 51. Bearing; 52. Bearing pressure ring; 53. Bushing; 54. Limiting nut;

[0063] 6. Drive assembly; 61. Output shaft; 7. Speed ​​change assembly; 8. Damping device; 9. Torque limiter. Detailed Implementation

[0064] In the embodiments of this application, the terms "first," "second," "third," "fourth," "fifth," and "sixth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," "third," "fourth," "fifth," and "sixth" may explicitly or implicitly include one or more of that feature.

[0065] In embodiments of this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0066] "A and / or B" includes the following three combinations: A only, B only, and a combination of A and B.

[0067] In the embodiments of this application, "parallel," "perpendicular," and "equal" include the described situation and situations similar to the described situation, the range of which is within an acceptable deviation range, said acceptable deviation range being determined by those skilled in the art taking into account the measurement under discussion and the error associated with the measurement of a particular quantity (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallelism and approximate parallelism, wherein the acceptable deviation range for approximate parallelism may be, for example, a deviation within 5°; "perpendicular" includes absolute perpendicularity and approximate perpendicularity, wherein the acceptable deviation range for approximate perpendicularity may also be, for example, a deviation within 5°. "Equal" includes absolute equality and approximate equality, wherein the acceptable deviation range for approximate equality may be, for example, a difference between the two equals being less than or equal to 5% of either one.

[0068] This application provides an operating device that can adjust its own height. For example, the operating device may include vehicles, industrial equipment, and agricultural machinery, etc. This application uses a vehicle as an example to describe the operating device in detail.

[0069] It is understood that the vehicle can be a gasoline-powered car, an electric car, a hybrid car, a natural gas car, a methanol car, a solar-powered car, etc. The vehicle can be a passenger car such as a sedan, a sport utility vehicle (SUV), or a multi-purpose vehicle (MPV), or it can be a bus, a truck, a semi-trailer, or a construction vehicle. This application does not impose specific restrictions in this regard.

[0070] Please refer to Figure 1 , Figure 1 This is a structural schematic diagram of a vehicle 100 provided in an embodiment of this application. The vehicle 100 may include a body 20 and wheels 30. The body 20 can be used for passengers to ride and for carrying goods. The wheels 30 are installed under the body 20 to support the body 20 and can roll on the road surface so that the vehicle 100 can move.

[0071] The vehicle 100 may also include a suspension system 10, which is connected between the vehicle body 20 and the wheels 30. The suspension system 10 transmits the forces and torques acting between the vehicle body 20 and the wheels 30, and buffers the impact forces experienced by the vehicle body 20 during vehicle operation, ensuring stable vehicle operation. The suspension system 10 can be a non-independent suspension system 10, an independent suspension system 10, or an active suspension system 10.

[0072] Please refer to Figure 1 and Figure 2 , Figure 2 This is a schematic diagram of the structure of a suspension system 10 provided in an embodiment of this application. In some embodiments of this application, the suspension system 10 may include an actuator 01, which may include a first component 1 and a second component 2. The first component 1 and the second component 2 may move relative to each other.

[0073] One of the first component 1 and the second component 2 is connected to the vehicle body 20, and the other of the first component 1 and the second component 2 is connected to the wheel 30. Since the first component 1 and the second component 2 can move relative to each other, the overall length of the actuator 01 can be adjusted by the relative movement between the first component 1 and the second component 2, thereby adjusting the distance between the vehicle body 20 and the wheel 30.

[0074] In this way, when the vehicle 100 is driving on a bumpy road, the wheels 30 will bounce along with the road surface due to their contact with the road. The actuator 01 of the vehicle 100 can adjust the distance between the vehicle body 20 and the wheels 30 by moving the first component 1 relative to the second component 2, thereby buffering the vehicle body 20 and keeping it relatively stable, thus improving the user's driving experience.

[0075] Specifically, this application embodiment takes the connection between the first component 1 and the wheel 30 and the connection between the second component 2 and the vehicle body 20 as an example for detailed explanation.

[0076] Please refer to Figure 2 and Figure 3 , Figure 3 for Figure 2 The cross-sectional view of the suspension system 10 shown shows that the actuator 01 usually also has an active adjustment function. By actively adjusting the relative position between the first component 1 and the second component 2, the height of the vehicle body 20 can be adjusted to meet the different usage needs of the driver and passengers. Therefore, the actuator 01 may also include a transmission component 3, which is connected to the second component 2 and is used to drive the second component 2 to move relative to the first component 1.

[0077] In this way, the transmission assembly 3 can actively control the movement of the second assembly 2 relative to the first assembly 1 to adjust the length of the actuator 01, thereby changing the height between the vehicle body 20 and the wheel 30.

[0078] However, during the operation of the vehicle 100, vibrations or impacts may occur between the vehicle body 20 and the wheels 30, causing swaying or displacement between the transmission assembly 3 and the second assembly 2. This results in a decrease in the stability between the first assembly 1 and the second assembly 2, as well as a reduction in the transmission efficiency of the transmission assembly 3.

[0079] Therefore, the actuator 01 provided in this application also includes a first limiting structure 4, which is disposed between the transmission component 3 and the second component 2. The first limiting structure 4 can prevent the transmission component 3 and the second component 2 from rotating relative to each other.

[0080] Thus, the first limiting structure 4 can limit the movement between the transmission component 3 and the second component 2, thereby reducing the shaking between the transmission component 3 and the second component 2 and improving the stability of the actuator 01.

[0081] Furthermore, since the relative movement of the second component 2 and the first component 1 can adjust the length of the actuator 01, the second component 2 can move linearly relative to the first component 1. The first limiting structure 4 prevents the transmission component 3 from rotating relative to the second component 2, thereby reducing the additional stress generated by the relative rotation between the transmission component 3 and the second component 2 and improving the transmission efficiency of the transmission component 3.

[0082] Please refer to Figure 3 and Figure 4 , Figure 4 This is a partial enlarged view of the first limiting structure 4 provided in the first embodiment of this application. In some embodiments of this application, the transmission assembly 3 may include a first transmission member 31 and a second transmission member 32. The first transmission member 31 cooperates with the second transmission member 32, and the first transmission member 31 and the second transmission member 32 move relative to each other. The first limiting structure 4 is disposed between the second transmission member 32 and the second assembly 2 to prevent the second transmission member 32 from rotating relative to the second assembly 2.

[0083] Thus, the second transmission member 32 can be connected to the second component 2, and the relative movement between the first transmission member 31 and the second transmission member 32 can drive the second component 2 to move relative to the first transmission member 31. Since the second component 2 moves linearly relative to the first component 1, the second component 2 and the first transmission member 31 can also move linearly relative to each other.

[0084] Since the second transmission member 32 moves linearly relative to the first transmission member 31, and the second component 2 also moves linearly relative to the first transmission member 31, the first limiting structure 4 is placed between the second transmission member 32 and the second component 2 to prevent relative rotation between the second transmission member 32 and the second component 2, thereby improving the transmission efficiency of the second transmission member 32.

[0085] In some other embodiments, the first limiting structure 4 may also be disposed between the first component 1 and the second transmission member 32. The first component 1 can restrict the second transmission member 32 from rotating relative to the first component 1 through the first limiting structure 4. At the same time, the first component 1 restricts the second component 2 from rotating relative to the first component 1. In this way, the second transmission member 32 can be prevented from rotating relative to the second component 2, reducing the additional stress caused by rotation and improving the transmission efficiency of the second transmission member 32.

[0086] In some embodiments, the first transmission member 31 and the second transmission member 32 rotate relative to each other, and the first transmission member 31 and the second transmission member 32 move linearly relative to each other. The first transmission member 31 can be connected to a motor, and the motor can drive the first transmission member 31 to rotate, so that the first transmission member 31 and the second transmission member 32 rotate relative to each other. The power of the motor does not need to undergo a motion conversion and is directly output to the first transmission member 31, which can reduce energy loss in the transmission path.

[0087] In some embodiments of this application, the first component 1 can be the housing of the actuator 01, which can be connected to the wheel 30. The second component 2 can be a piston assembly, which can be connected to the vehicle body 20. The first transmission member 31 can be connected to the first component 1, that is, the first transmission member 31 is connected to the housing of the actuator 01, and thus connected to the wheel 30. The second transmission member 32 can be connected to the second component 2, that is, the second transmission member 32 is connected to the piston assembly, and thus connected to the vehicle body 20.

[0088] It is understood that the first transmission member 31 and the second transmission member 32 rotate relative to each other, and the first transmission member 31 and the second transmission member 32 move linearly relative to each other, wherein the motor drives the first transmission member 31 to rotate. When the ground is taken as a reference, the first transmission member 31 may only rotate relative to the ground, while the second transmission member 32 moves linearly relative to the ground, driving the second component 32 to move linearly relative to the ground, so that the height of the wheel 30 relative to the ground remains unchanged, and the vehicle body 20 rises and falls relative to the ground; alternatively, the second transmission member 32 may be stationary relative to the ground, while the first transmission member 31 rotates under the drive of the motor and moves linearly relative to the ground, simultaneously driving the motor and the first component 1 to move up and down together. This application does not specifically limit this.

[0089] The following embodiment will be specifically described with the first transmission member 31 rotating only relative to the ground and the second transmission member 32 moving linearly relative to the ground.

[0090] In some embodiments, the first transmission member 31 can also perform linear motion to drive the second transmission member 32 to perform linear motion. In other embodiments, the motor can also be a linear motor to output linear motion and drive the second transmission member 32 to perform linear motion. However, linear motors are more expensive and more sensitive to load changes, so rotary motors are usually used.

[0091] In some embodiments, the first transmission member 31 includes a lead screw, and the second transmission member 32 includes a lead nut. Since the lead screw and lead nut can rotate relative to each other and move along the extension direction of the lead screw under the guidance of the lead screw's thread when they engage, the first transmission member 31 is configured as a lead screw, and the second transmission member 32 is configured as a lead nut. This allows the rotational motion of the lead screw to be converted into the linear motion of the lead nut, thereby driving the second component 2 to perform linear motion.

[0092] Furthermore, the screw threaded connection between the nut and the screw rod provides high precision, enabling accurate control of the movement distance of the second component 2 and thus adjusting the positional relationship between the vehicle body 20 and the wheel 30. Moreover, the screw threaded connection allows the nut and screw rod to withstand high axial and radial forces, effectively resisting impacts and vibrations between the wheel 30 and the vehicle body 20.

[0093] In some other embodiments, the first transmission member 31 and the second transmission member 32 may also be a gear and rack meshing structure, a crank and slider meshing mechanism, or a worm gear meshing structure, etc., to convert the rotational motion output by the motor into linear motion.

[0094] In some embodiments, the second component 2 includes a piston 21, which is movable relative to the first component 1; the piston 21 is disposed around the second transmission member 32, and the first limiting structure 4 is connected between the second transmission member 32 and the piston 21.

[0095] The piston 21 is arranged around the second transmission member 32, and the piston 21 moves relative to the first component 1, which can increase the contact area between the second component 2 and the first component 1, making the relative movement between the second component 2 and the first component 1 more stable.

[0096] In the first embodiment provided in this application, the second component 2 and the second transmission member 32 can be fitted with a keyway to prevent relative rotation between the second transmission member 32 and the second component 2. The actuator 01 structure under this first embodiment will now be described in detail.

[0097] Please refer to the reference. Figure 3 , Figure 4 and Figure 5 , Figure 5 for Figure 4 The schematic diagram of the first limiting structure 4 shown shows that, in some embodiments, at least a portion of the second component 2 is sleeved on the second transmission member 32; the first limiting structure 4 includes a limiting key 41, a first keyway 42 disposed on the outer peripheral wall of the second transmission member 32, and a second keyway 43 disposed on the inner peripheral wall of the second component 2. The limiting key 41 is accommodated in the first keyway 42 and the second keyway 43 to prevent the second transmission member 32 from rotating relative to the second component 2.

[0098] At least a portion of the second component 2 is fitted onto the second transmission member 32 and is accommodated in the first keyway 42 and the second keyway 43 by a limiting key 41. This effectively prevents relative rotation between the second transmission member 32 and the second component 2, thereby enabling the second transmission member 32 to transmit linear motion to the second component 2, thus allowing the second component 2 to move relative to the first component 1.

[0099] In addition, since the first transmission member 31 rotates and the second transmission member 32 moves linearly, the limiting key 41 between the second transmission member 32 and the second component 2 prevents the second transmission member 32 from rotating relative to the second component 2, thus preventing the second transmission member 32 from rotating with the first transmission member 31 and causing a decrease in transmission efficiency.

[0100] In some embodiments, along the axial direction of piston 21, one end of the inner bore of piston 21 forms a first opening 211; the second component 2 further includes a blocking member 22 fixedly connected to piston 21, along the axial direction of piston 21, the blocking member 22 and the first opening 211 are located on the same side of the second transmission member 32, the blocking member 22 is used to prevent the second transmission member 32 from disengaging from piston 21 via the first opening 211.

[0101] Since the piston 21 is sleeved on the second transmission member 32, the piston 21 may include an inner hole. Since the inner hole of the piston 21 forms a first opening 211 along its axial direction, the second transmission member 32 can be installed in the inner hole of the piston 21 through the first opening 211. The first opening 211 facilitates the installation and connection of the piston 21 and the second transmission member 32.

[0102] The blocking member 22 is positioned in the direction of the second transmission member 32 toward the first opening 211, and the blocking member 22 is fixedly connected to the piston 21. In this way, along the axial direction of the piston 21, the blocking member 22 can limit the second transmission member 32, preventing the second transmission member 32 from coming out of the inner hole of the piston 21, making the structure of the actuator 01 more stable.

[0103] In some embodiments, the second component 2 may further include a piston rod 23, which is located on the side of the second transmission member 32 away from the first opening 211, and a portion of the piston rod 23 is located in the inner hole and is fixedly connected to the piston 21.

[0104] Since the second component 2 and the first component 1 are respectively connected to one of the wheel 30 and the vehicle body 20, the piston rod 23 is connected to the piston 21, which can transmit the relative motion between the piston 21 and the first component 1 to the piston rod 23, and thus to the wheel 30 or the vehicle body 20. The piston rod 23 can extend the adjustment range of the actuator 01, thereby increasing the adjustment range of the height between the vehicle body 20 and the wheel 30, and expanding the applicable scenarios of the vehicle 100.

[0105] The piston rod 23 has a clearance space 231 for avoiding the first transmission member 31. In this way, when the second component 2 moves toward the first component 1, at least a part of the first transmission member 31 can be accommodated in the clearance space 231, so that the length of the actuator 01 is shortened as much as possible, saving the layout space of the actuator 01.

[0106] In some embodiments, the inner bore may include a first inner bore section 212 and a second inner bore section 213, wherein the cross-sectional size of the first inner bore section 212 is larger than the cross-sectional size of the second inner bore section 213; a second transmission member 32 is disposed in the first inner bore section 212, and a first opening 211 is disposed at one end of the first inner bore section 212 away from the second inner bore section 213; a portion of the piston rod 23 is located in the second inner bore section 213.

[0107] Since the second transmission member 32 is located inside the first inner hole section 212, and the cross-sectional size of the first inner hole section 212 is larger than that of the second inner hole section 213, and the first opening 211 is located at one end of the first inner hole section 212 away from the second inner hole section 213, the second inner hole section 213 and the blocking member 22 can be located at both ends of the second transmission member 32 along the axial direction of the piston 21, thereby limiting the second transmission member 32 and preventing the second transmission member 32 from moving axially.

[0108] In some embodiments, the piston rod 23 is threadedly connected to the piston 21. This fixed connection allows the piston rod 23 and piston 21 to move synchronously relative to the first component 1, thereby adjusting the length of the actuator 01. Because threaded connections have high strength and load-bearing capacity, threaded connections between the piston 21 and piston rod 23 can reduce the impact of vehicle vibration or impact on the connection strength between the piston 21 and piston rod 23, improving the stability and reliability of the connection.

[0109] Please refer to the reference. Figure 3 and Figure 6 , Figure 6 This is a partially enlarged view of the first limiting structure 4 provided in the second embodiment of this application. In the second embodiment provided by this application, the second component 2 and the second transmission member 32 can be connected by threads to prevent relative rotation between the second transmission member 32 and the second component 2. The actuator 01 structure under this second embodiment will be described in detail below.

[0110] In some embodiments, at least a portion of the piston 21 is provided with a first internal thread 2171, and at least a portion of the second transmission member 32 is provided with a first external thread 3211 that mates with the first internal thread 2171.

[0111] The first internal thread 2171 and the first external thread 3211 are engaged to fix the second transmission component 32 and the second assembly 2 together. This prevents relative rotation between the second transmission component 32 and the second assembly 2 when the second transmission component 32 moves relative to the first transmission component 31. The threaded connection reduces the number of parts in the actuator 01 and simplifies the connection between the second transmission component 32 and the second assembly 2.

[0112] In some embodiments, the first transmission member 31 includes a lead screw, and the second transmission member 32 includes a lead nut. The rotational motion is converted into linear motion through the cooperation of the lead screw and the lead nut, thereby adjusting the movement of the second component 2 relative to the first component 1. However, when the second transmission member 32 and the second component 2 are fixedly connected by a threaded connection, since the first transmission member 31 and the second transmission member 32 can rotate relative to each other, in order to prevent loosening between the second transmission member 32 and the second component 2, the pitch of the first internal thread 2171 and the first external thread 3211 in this embodiment is 1 / 2 to 4 / 5 of the pitch of the first transmission member 31.

[0113] This improves the torsional resistance between the first internal thread 2171 and the first external thread 3211, thereby enhancing the self-locking and anti-loosening capabilities between the second transmission component 32 and the second component 2, reducing loosening between the second transmission component 32 and the second component 2, and improving the stability and reliability of the actuator 01.

[0114] For example, the lead screw and the lead nut are connected by a coarse thread, and the second transmission member 32 and the second component 2 are connected by a fine thread. Since the fine thread has stronger torsional resistance and better self-locking performance than the coarse thread, it can effectively prevent the second transmission member 32 from rotating relative to the second component 2.

[0115] In some embodiments, the first internal thread 2171 and the first external thread 3211 can be bonded together with an adhesive. This further improves the stability of the connection between the second transmission member 32 and the second component 2, preventing relative rotation between the second transmission member 32 and the second component 2.

[0116] For example, the adhesive material can be threadlocker, which does not cure when in contact with air or oxygen, but can rapidly polymerize into a cross-linked solid polymer after being isolated from air. Therefore, after the threadlocker is applied to the first internal thread 2171 or the first external thread 3211, the threadlocker cures when the first internal thread 2171 and the first external thread 3211 are tightened, thereby making the first internal thread 2171 and the first external thread 3211 firmly connected and not prone to loosening.

[0117] In some embodiments, one axial end of the piston 21 is a first end 217, and the second component 2 further includes a piston rod 23 connected to the first end 217 of the piston 21; a first internal thread 2171 is provided on the first end 217 of the piston 21; the second transmission member 32 includes a second end 321, which is housed within the first end 217, and a first external thread 3211 is provided on the outer peripheral wall of the second end 321.

[0118] In this way, the first internal thread 2171 is provided at the first end 217, and the first external thread 3211 is provided at the second end 321. The first internal thread 2171 and the first external thread 3211 are connected to fix the second transmission component 32 to the piston 21. The first internal thread 2171 and the first external thread 3211 are both provided at the end of the component, which facilitates production and processing.

[0119] The piston rod 23 is connected to the first end 217 of the piston 21, and can transmit the relative motion between the piston 21 and the first component 1 to the piston rod 23, thereby transmitting it to the wheel 30 or the vehicle body 20. The piston rod 23 can extend the adjustment range of the actuator 01, thereby increasing the height adjustment range between the vehicle body 20 and the wheel 30, and expanding the applicable scenarios of the vehicle 100.

[0120] In some embodiments, the piston 21 includes a third inner bore section 214 and a fourth inner bore section 215 connected to each other, the cross-sectional size of the third inner bore section 214 being smaller than the cross-sectional size of the fourth inner bore section 215; a first internal thread 2171 is provided on the third inner bore section 214.

[0121] Since the first internal thread 2171 is located in the third inner hole section 214, the first end 217 is located in the third inner hole section 214 and is connected to the second transmission member 32. The cross-sectional size of the fourth inner hole section 215 is larger than that of the third inner hole section 214. Therefore, the diameter of the second transmission member 32 located in the fourth inner hole section 215 is larger than the diameter of the piston 21 in the third inner hole section 214. Thus, the second transmission member 32 located in the fourth inner hole section 215 can provide support for the piston 21 in the third inner hole section 214, preventing the first internal thread 2171 and the first external thread 3211 from loosening under the influence of gravity or vehicle vibration and impact. This further improves the connection strength between the second transmission member 32 and the piston 21, preventing relative rotation between the second transmission member 32 and the piston 21.

[0122] In some embodiments, the piston 21 further includes a fifth inner bore section 216, which is connected to the end of the fourth inner bore section 215 away from the third inner bore section 214, and the cross-sectional size of the fifth inner bore section 216 is larger than the cross-sectional size of the fourth inner bore section 215.

[0123] Since the piston 21 is sleeved on the second transmission member 32, the cross-sectional size of the fifth inner hole section 216 is larger than that of the fourth inner hole section 215. This can shorten the area where the piston 21 and the second transmission member 32 are in close contact, thereby reducing the fitting accuracy between the outer peripheral surface of the second transmission member 32 and the inner wall surface of the piston 21 and reducing the processing difficulty.

[0124] In some embodiments, a portion of the piston rod 23 is housed within the second end 321 and is fixedly connected to the second transmission member 32.

[0125] Thus, the piston rod 23 is connected to the second transmission component 32, and the second transmission component 32 is connected to the piston 21. Through the second transmission component 32, the piston rod 23 and the piston 21 can be indirectly connected, thereby transmitting the movement of the piston 21 relative to the first component 1 to the piston rod 23.

[0126] In addition, the piston rod 23 is connected to either the wheel 30 or the vehicle body 20 and is fixedly connected to the second transmission member 32, which can further restrict the circumferential movement of the second transmission member 32 and prevent the second transmission member 32 from rotating relative to the piston 21.

[0127] In some embodiments, the second end 321 is provided with a second internal thread, and at least a portion of the piston rod 23 is provided with a second external thread that mates with the second internal thread, so that the piston rod 23 is fixedly connected to the second transmission member 32.

[0128] The piston rod 23 and the second transmission component 32 can be fixedly connected by the mating of the second internal thread and the second external thread, enabling them to move synchronously relative to the first component 1, thereby adjusting the length of the actuator 01. Because the threaded connection has high strength and load-bearing capacity, connecting the second transmission component 32 and the piston rod 23 by threads can reduce the impact of vehicle vibration or impact on the connection strength between the second transmission component 32 and the piston rod 23, improving the stability and reliability of the connection.

[0129] In some embodiments, the second internal thread has the opposite rotation direction to the first internal thread 2171. Since the first external thread 3211 and the second internal thread are respectively provided on the outer peripheral wall and inner peripheral wall of the second end 321, by making the rotation direction of the second internal thread opposite to that of the first internal thread 2171, it is possible to prevent the first internal thread 2171 from loosening when the second internal thread is tightened, and further make the connection between the piston 21, the second transmission member 32 and the piston rod 23 more secure.

[0130] In some embodiments, the pitch of the second internal thread and the second external thread is 1 / 2 to 4 / 5 of the pitch of the first transmission member 31. This improves the torsional resistance between the second internal thread and the second external thread, thereby improving the self-locking and anti-loosening capabilities between the second transmission member 32 and the piston rod 23, reducing loosening between the second transmission member 32 and the piston rod 23, and improving the stability and reliability of the actuator 01.

[0131] For example, the lead screw and the lead nut are connected by a coarse thread, and the second transmission member 32 and the second component 2 are connected by a fine thread. Since the fine thread has stronger torsional resistance and better self-locking performance than the coarse thread, it can effectively prevent the second transmission member 32 from rotating relative to the second component 2.

[0132] In some embodiments, the second internal thread and the second external thread can also be bonded together with adhesive. This can further improve the stability of the connection between the second internal thread and the second external thread and prevent relative rotation between the second transmission member 32 and the piston rod 23.

[0133] In some embodiments, the first component 1 has a receiving chamber, the second component 2 is housed in the receiving chamber and slides relative to the inner wall surface of the receiving chamber; the second component 2 also includes a seal 24 disposed on the surface of the piston 21 facing the inner wall surface of the receiving chamber.

[0134] The second component 2 is housed within the receiving chamber and slides relative to the inner wall of the receiving chamber, thus dividing the receiving chamber into a first chamber and a second chamber. A seal 24 is disposed between the piston 21 and the inner wall of the receiving chamber, isolating the first chamber from the second chamber. Therefore, when the second component 2 moves relative to the first component 1, changes in air or hydraulic pressure within the first and second chambers can buffer against bumps or impacts to the vehicle 100, improving the driving comfort of the vehicle 100.

[0135] In some other embodiments, the seal 24 may also be disposed on the inner wall surface of the receiving chamber.

[0136] In some embodiments, the seal 24 can be an elastic element, so that the seal 24 can provide a certain buffer against the impact between the piston 21 and the first component 1, thereby reducing the noise and vibration between the piston 21 and the first component 1.

[0137] For example, the seal 24 can be made of rubber, plastic or other composite elastic materials, etc.

[0138] In some embodiments, the second component 2 may further include a buffer 25 disposed at at least one end of the piston 21 along the axial direction of the piston 21. Since the second component 2 moves relative to the first component 1, disposing the buffer 25 at at least one end of the piston 21 along the axial direction of the piston 21 can reduce the collision between the second component 2 and the first component 1 due to the large range of motion when the vehicle 100 is bumpy or impacted, thus helping to extend the service life of the actuator 01.

[0139] Please refer to Figure 3 and Figure 7 , Figure 7This is a partial enlarged view of a second limiting structure 5 provided in an embodiment of this application. In some embodiments, the actuator 01 provided in this application may further include a second limiting structure 5. The second limiting structure 5 is disposed between the first transmission member 31 and the first component 1 to prevent the first transmission member 31 from moving relative to the first component 1 in a first direction. The first direction is the relative movement direction of the first component 1 and the second component 2.

[0140] In this way, the movement along the first direction within the transmission assembly 3 is not easily dispersed by the first transmission member 31, but is transmitted to the second transmission member 32. The second transmission member 32 then transmits the movement along the first direction to the second assembly 2, causing the second assembly 2 to move relative to the first assembly 1, thereby improving the transmission efficiency of the transmission assembly 3.

[0141] For example, the first transmission member 31 rotates and the second transmission member 32 moves linearly. By limiting the first transmission member 31 along the first direction, the power of the linear motion can be transmitted to the second transmission member 32, thereby improving the transmission efficiency of the transmission assembly 3.

[0142] In some embodiments, the actuator 01 may further include a bearing 51, the outer ring of which is connected to the first component 1, and the inner ring of which is connected to the first transmission member 31. This reduces friction between the first transmission member 31 and the first component 1, resulting in smoother and more fluid movement between them.

[0143] The second limiting structure 5 may include a bearing retaining ring 52, the bearing retaining ring 52 and the bearing 51 being arranged in the same direction as the bearing 51 along its axial direction, and the bearing retaining ring 52 abutting against the outer ring of the bearing 51; the bearing retaining ring 52 is fixedly connected to the first component 1. In this way, along the axial direction of the bearing 51, the bearing retaining ring 52 can limit the bearing 51, which is connected to the first transmission component 31, thereby limiting the first transmission component 31 and preventing it from moving along the axial direction of the bearing 51.

[0144] In some embodiments, the outer wall surface of the bearing ring 52 is provided with a third external thread, and the inner wall surface of the first component 1 connected to the bearing ring 52 is provided with a third internal thread, and the third external thread and the third internal thread cooperate.

[0145] In this way, the bearing retaining ring 52 can be fixedly connected to the inner wall of the first component 1, thereby limiting the bearing 51. Since the threaded connection has high strength and strong load-bearing capacity, the threaded connection between the bearing retaining ring 52 and the first component 1 can reduce the impact of vehicle vibration or impact on the connection strength between the bearing retaining ring 52 and the first component 1, and improve the stability and reliability of the connection.

[0146] In some embodiments, both the third internal thread and the third external thread are fine-pitch threads. Since fine-pitch threads have stronger torsional resistance and better self-locking performance than coarse-pitch threads, they can effectively prevent loosening between the third internal thread and the third external thread.

[0147] In some embodiments, the second limiting structure 5 may further include a bushing 53 and a limiting nut 54, both of which are disposed between the first transmission member 31 and the bearing 51, and the bushing 53 and the limiting nut 54 are arranged along the axial direction of the first transmission member 31.

[0148] The bushing 53 and the limiting nut 54 are disposed between the first transmission member 31 and the bearing 51, which can restrict the movement between the inner ring of the bearing 51 and the first transmission member 31, and prevent the first transmission member 31 from moving in the first direction.

[0149] Specifically, the bushing 53 includes a first part and a second part connected together. The first part is located between the bearing 51 and the first transmission member 31. This first part can fill the gap between the bearing 51 and the first transmission member 31, so that the inner ring of the bearing 51 is tightly connected to the first transmission member 31, reducing the relative rotation between the inner ring of the bearing 51 and the first transmission member 31.

[0150] One end of the second part abuts against one end of the inner ring of the bearing 51. The outer surface of the first transmission member 31 is provided with a stepped surface, and the other end of the second part abuts against the stepped surface. The limiting nut 54 is threadedly connected to the first transmission member 31, and the end face of the limiting nut 54 abuts against the other end of the inner ring of the bearing 51.

[0151] In this way, the stepped surface of the first transmission component 31 and the end face of the limiting nut 54 are respectively located at both ends of the inner ring of the bearing 51, which can reduce the movement between the inner ring of the bearing 51 and the first transmission component 31 along the first direction. Since the inner and outer rings of the bearing 51 are locked along the axial direction, the outer ring of the bearing 51 cannot move relative to the first assembly 1, and the inner ring of the bearing 51 cannot move relative to the first transmission component 31 along the first direction. Therefore, the first assembly 1 and the first transmission component 31 cannot move relative to each other along the first direction, thereby limiting the first transmission component 31 and improving the transmission efficiency of the transmission assembly 3.

[0152] In some embodiments, the actuator 01 may further include a drive component 6, which is connected to the first transmission member 31 to drive the first transmission member 31 to rotate.

[0153] The drive assembly 6 is driveably connected to the first transmission member 31 and drives the first transmission member 31 to rotate. The first transmission member 31 transmits power to the second transmission member 32, causing the second transmission member 32 to move linearly, and driving the second assembly 2 connected to the second transmission member 32 to move linearly. Through the drive assembly 6, the length of the actuator 01 can be actively controlled, thereby achieving the adjustment of the height of the vehicle 100.

[0154] In some embodiments, the actuator 01 may further include a speed change component 7, which is connected between the drive component 6 and the first transmission member 31. The speed change component 7 allows for adjustment of the rotational speed of the first transmission member 31, thereby enabling precise adjustment of the travel distance of the second component 2.

[0155] Both the drive assembly 6 and the transmission assembly 7 can be housed within the actuator 01 housing. The first assembly 1 can include the actuator 01 housing, the drive assembly 6, and the transmission assembly 7, such that the actuator 01 housing, the drive assembly 6, and the transmission assembly 7 all move linearly relative to the second transmission assembly 32 together with the first transmission member 31. In some embodiments, the transmission assembly 7 can include a first gear and a second gear connected in a transmission relationship. The first gear is coaxially arranged with the first transmission member 31, and the second gear is coaxially arranged with the output shaft 61 of the drive assembly 6.

[0156] By setting the first gear and the second gear in the transmission connection and adjusting the gear ratio of the first gear and the second gear, different transmission ratios can be achieved to precisely adjust the speed of the first transmission component 31 and meet different working requirements.

[0157] In some embodiments, the transmission assembly 7 may further include a third gear and / or a fourth gear, etc., for adjusting the transmission ratio of the transmission assembly 7, which is not further limited in this application.

[0158] In some embodiments, the first gear is connected to the first transmission member 31 via a spline connection, and / or the second gear is connected to the output shaft 61 of the drive assembly 6 via a spline connection.

[0159] In this way, the power of the output shaft 61 of the drive assembly 6 can be output to the second gear. Since the second gear is connected to the first gear, the power of the second gear can be transmitted to the first gear. The first gear is connected to the first transmission member 31 by a spline fit, so that the rotational motion of the first gear can be transmitted to the first transmission member 31, so that the first transmission member 31 can rotate.

[0160] Because spline connections offer high strength and precision, they are less prone to loosening or wear during use, thus reducing maintenance costs. Furthermore, splines can adapt to various working conditions and loads, ensuring that gears and drive shafts maintain optimal performance under diverse operating conditions.

[0161] In some embodiments, the actuator 01 may further include a torque limiter 9 connected between the first transmission member 31 and the first gear to limit the torque transmitted from the first transmission member 31 to the first gear. The torque limiter 9 only allows torque within a set limit to be transmitted to the first gear. When there is torque exceeding the set limit in the rotating shaft, the rotation of the rotating shaft will not be transmitted to the first gear, thereby protecting the motor.

[0162] In some embodiments, the actuator 01 may further include a damping device 8, and the first component 1 has a receiving chamber that communicates with the damping device 8 so that buffer oil can flow between the receiving chamber and the damping device 8.

[0163] The first component 1 may contain damping fluid within its accommodating chamber. The movement of the second component 2 is influenced by the hydraulic pressure of the damping fluid, thereby preventing the second component 2 from directly impacting the edge of the first component 1 when the vehicle 100 is subjected to shocks or vibrations, thus buffering the impact and vibration. The damping device 8 is connected to the accommodating chamber and can adjust the amount and flow rate of the damping fluid within the accommodating chamber, thereby adjusting the damping of the actuator 01 so that the stiffness and damping effect of the suspension system 10 meet the user's requirements.

[0164] In some embodiments of this application, the suspension system 10 may further include a spring 02, one end of which is connected to the first component 1, and the other end of which is connected to either the vehicle body 20 or the wheel 30. Exemplarily, the spring 02 may be an air spring or a coil spring, and this application does not limit it to either.

[0165] Thus, when the vehicle 100 travels on bumpy roads, the suspension system 10 can use the actuator 01 and the spring 02 to dampen the vehicle body 20, improving the damping effect of the suspension system 10. In addition, the spring 02 can also support the vehicle body 20, reducing the pressure of the vehicle body 20 on the second component 2, which helps to extend the service life of the actuator 01.

[0166] In the description of the embodiments of this application, specific features, structures, materials or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0167] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An actuator, characterized in that, include: A first component (1), a second component (2), and a transmission component (3) connected to the second component (2), the transmission component (3) being used to drive the second component (2) to move relative to the first component (1); A first limiting structure (4) is provided between the transmission component (3) and the second component (2), and the first limiting structure (4) prevents the transmission component (3) and the second component (2) from rotating relative to each other.

2. The actuator according to claim 1, characterized in that, The transmission assembly (3) includes a first transmission member (31) and a second transmission member (32), the first transmission member (31) cooperates with the second transmission member (32), and the first transmission member (31) and the second transmission member (32) move relative to each other; The first limiting structure (4) is disposed between the second transmission member (32) and the second component (2) to prevent the second transmission member (32) and the second component (2) from rotating relative to each other.

3. The actuator according to claim 2, characterized in that, The first transmission member (31) and the second transmission member (32) rotate relative to each other, and the first transmission member (31) and the second transmission member (32) move in a straight line relative to each other.

4. The actuator according to claim 3, characterized in that, The first transmission component (31) includes a lead screw, and the second transmission component (32) includes a lead nut.

5. The actuator according to claim 2, characterized in that, The second component (2) includes a piston (21) that is movable relative to the first component (1); The piston (21) is arranged around the second transmission member (32), and the first limiting structure (4) is connected between the second transmission member (32) and the piston (21).

6. The actuator according to claim 5, characterized in that, At least a portion of the second component (2) is fitted onto the second transmission member (32); the first limiting structure (4) includes a limiting key (41), a first keyway (42) disposed on the outer peripheral wall of the second transmission member (32), and a second keyway (43) disposed on the inner peripheral wall of the second component (2). The limiting key (41) is accommodated in the first keyway (42) and the second keyway (43) to prevent the second transmission member (32) from rotating relative to the second component (2).

7. The actuator according to claim 6, characterized in that, The inner bore of the piston (21) forms a first opening (211) at one end along the axial direction of the piston (21); The second component (2) further includes a blocking member (22) fixedly connected to the piston (21). Along the axial direction of the piston (21), the blocking member (22) and the first opening (211) are located on the same side of the second transmission member (32). The blocking member (22) is used to prevent the second transmission member (32) from disengaging from the piston (21) via the first opening (211).

8. The actuator according to claim 7, characterized in that, The second component (2) further includes a piston rod (23), which is located on the side of the second transmission member (32) away from the first opening (211), and a portion of the piston rod (23) is located in the inner hole and is fixedly connected to the piston (21).

9. The actuator according to claim 8, characterized in that, The piston rod (23) is provided with a clearance space (231), which is used to avoid the first transmission member (31).

10. The actuator according to claim 9, characterized in that, The inner hole includes a first inner hole section (212) and a second inner hole section (213), the cross-sectional size of the first inner hole section (212) is larger than the cross-sectional size of the second inner hole section (213); the second transmission member (32) is disposed in the first inner hole section (212), and the first opening (211) is disposed at the end of the first inner hole section (212) away from the second inner hole section (213); the portion of the piston rod (23) is located in the second inner hole section (213).

11. The actuator according to claim 9, characterized in that, The piston rod (23) is threadedly connected to the piston (21).

12. The actuator according to claim 5, characterized in that, At least a portion of the piston (21) is provided with a first internal thread (2171), and at least a portion of the second transmission member (32) is provided with a first external thread (3211) that mates with the first internal thread (2171).

13. The actuator according to claim 12, characterized in that, The first transmission component (31) includes a lead screw, and the second transmission component (32) includes a lead nut; The pitch of the first internal thread (2171) and the first external thread (3211) is 1 / 2 to 4 / 5 of the pitch of the first transmission component (31).

14. The actuator according to claim 12, characterized in that, The first internal thread (2171) and the first external thread (3211) are bonded together by adhesive.

15. The actuator according to claim 12, characterized in that, Along the axial direction of the piston (21), one end of the piston (21) is a first end (217); the second component (2) also includes a piston rod (23), which is connected to the first end (217) of the piston (21); The first internal thread (2171) is provided at the first end (217) of the piston (21); the second transmission member (32) includes a second end (321), the second end (321) is housed in the first end (217), and the first external thread (3211) is provided on the outer peripheral wall of the second end (321).

16. The actuator according to claim 15, characterized in that, The piston (21) includes a third inner bore section (214) and a fourth inner bore section (215) connected to each other. The cross-sectional size of the third inner bore section (214) is smaller than that of the fourth inner bore section (215). The first internal thread (2171) is provided on the third inner bore section (214).

17. The actuator according to claim 16, characterized in that, The piston (21) further includes a fifth inner bore section (216), which is connected to the end of the fourth inner bore section (215) away from the third inner bore section (214), and the cross-sectional size of the fifth inner bore section (216) is larger than the cross-sectional size of the fourth inner bore section (215).

18. The actuator according to claim 15, characterized in that, A portion of the piston rod (23) is housed within the second end (321) and is fixedly connected to the second transmission member (32).

19. The actuator according to claim 18, characterized in that, The second end (321) is provided with a second internal thread, and at least a portion of the piston rod (23) is provided with a second external thread that mates with the second internal thread, so that the piston rod (23) is fixedly connected to the second transmission member (32).

20. The actuator according to claim 19, characterized in that, The second internal thread has the opposite rotation direction to the first internal thread (2171).

21. The actuator according to claim 19, characterized in that, The pitch of the second internal thread and the second external thread is 1 / 2 to 4 / 5 of the pitch of the first transmission component (31).

22. The actuator according to any one of claims 6-21, characterized in that, The first component (1) has a receiving chamber, and the second component (2) is housed in the receiving chamber and slides relative to the inner wall of the receiving chamber.

23. The actuator according to claim 22, characterized in that, The second component (2) further includes a seal (24) disposed on the surface of the piston (21) facing the inner wall of the receiving chamber.

24. The actuator according to any one of claims 6-21, characterized in that, The second component (2) further includes a buffer (25) disposed at at least one end of the piston (21) along the axial direction of the piston (21).

25. The actuator according to claim 2, characterized in that, It also includes a second limiting structure (5), which is disposed between the first transmission member (31) and the first component (1).

26. The actuator according to claim 25, characterized in that, It also includes a bearing (51), the outer ring of which is connected to the first component (1), and the inner ring of which is connected to the first transmission component (31).

27. The actuator according to claim 26, characterized in that, The second limiting structure (5) includes a bearing pressure ring (52), the bearing pressure ring (52) and the bearing (51) are arranged in the same direction as the relative movement direction of the first component (1) and the second component (2), and the bearing pressure ring (52) abuts against the outer ring of the bearing (51); the bearing pressure ring (52) is fixedly connected to the first component (1).

28. The actuator according to claim 27, characterized in that, The outer wall surface of the bearing pressure ring (52) is provided with a third external thread, and the inner wall surface of the first component (1) connected to the bearing pressure ring (52) is provided with a third internal thread. The third external thread and the third internal thread are engaged.

29. The actuator according to claim 28, characterized in that, The second limiting structure (5) also includes a bushing (53) and a limiting nut (54), wherein the bushing (53) and the limiting nut (54) are both disposed between the first transmission member (31) and the bearing (51).

30. The actuator according to claim 29, characterized in that, The bushing (53) and the limiting nut (54) are arranged along the axial direction of the bearing (51); the bushing (53) includes a first part and a second part connected to each other, the first part is located between the bearing (51) and the first transmission member (31), and one end of the second part abuts against one end of the inner ring of the bearing (51); the outer surface of the first transmission member (31) is provided with a stepped surface, and the other end of the second part abuts against the stepped surface; The limiting nut (54) is threadedly connected to the first transmission member (31), and the end face of the limiting nut (54) abuts against the other end of the inner ring of the bearing (51).

31. The actuator according to claim 2, characterized in that, It also includes a drive assembly (6), which is connected to the first transmission member (31) to drive the first transmission member (31) to rotate.

32. The actuator according to claim 31, characterized in that, It also includes a transmission assembly (7) connected between the drive assembly (6) and the first transmission member (31).

33. The actuator according to claim 32, characterized in that, The transmission assembly (7) includes a first gear and a second gear that are connected by transmission. The first gear is coaxially arranged with the first transmission member (31), and the second gear is coaxially arranged with the output shaft (61) of the drive assembly (6).

34. The actuator according to claim 33, characterized in that, The first gear is connected to the first transmission member (31) via a spline connection, and / or the second gear is connected to the output shaft (61) of the drive assembly (6) via a spline connection.

35. The actuator according to claim 33, characterized in that, It also includes a torque limiter (9) connected between the first transmission member (31) and the first gear to limit the torque transmitted from the first transmission member (31) to the first gear.

36. The actuator according to claim 2, characterized in that, It also includes a damping device (8), and the first component (1) has a receiving chamber that is connected to the damping device (8) so that buffer oil can flow between the receiving chamber and the damping device (8).

37. A suspension system, characterized in that, Includes the actuator (01) according to any one of claims 1-36.

38. The suspension system according to claim 37, characterized in that, Also includes: A spring (02), one end of which is connected to the first component (1), and the other end of which is adapted to be connected to the vehicle body (20) or the wheel (30).

39. A vehicle, characterized in that, Includes the actuator (01) according to any one of claims 1-36, and / or includes the suspension system (10) according to claim 37 or 38.

40. The vehicle according to claim 39, characterized in that, Also includes: The vehicle body (20) and wheels (30) are connected to the vehicle body (20) by one of the first component (1) and the second component (2), and to the wheels (30) by the other of the first component (1) and the second component (2).

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