Actuator, suspension assembly and vehicle

Abstract

A vehicle. The vehicle comprises a suspension assembly, and the suspension assembly comprises an actuator. The actuator comprises a motor housing, a nut and a displacement sensor. The nut is rotatably mounted on the motor housing and is used for driving a lead screw to move linearly. The displacement sensor comprises a sensor rotor and a sensor stator; the sensor rotor is arranged on the nut; and the sensor stator is fixed relative to the motor housing. The displacement sensor is used for detecting the rotational displacement of the nut.

Description

Actuators, suspension assemblies and vehicles

[0001] Cross-reference to related applications

[0002] This application claims priority to Chinese patent application filed on May 28, 2024, with application number 202410682474.2 and entitled "Actuator, Suspension Assembly and Vehicle", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of vehicle technology, and more particularly to an actuator, a suspension assembly having the actuator, and a vehicle having the suspension assembly. Background Technology

[0004] In related technologies, the actuator includes a motor housing, a nut, a lead screw, and a displacement sensor. The nut is rotatably mounted inside the motor housing. When the nut rotates, it drives the lead screw to rotate and move linearly. The displacement sensor is used to detect the displacement of the lead screw, but the accuracy of the detection results is not ideal. Therefore, there is room for improvement. Summary of the Invention

[0005] This application aims to at least partially solve one of the aforementioned technical problems in the prior art. To this end, this application proposes an actuator whose displacement sensor can directly detect the rotational displacement of the nut, thereby obtaining a more accurate linear displacement result of the lead screw.

[0006] This application also proposes a suspension assembly having the aforementioned actuator.

[0007] This application also proposes a vehicle having the above-described suspension assembly.

[0008] The actuator according to an embodiment of this application includes: a motor housing, a nut, and a displacement sensor. The nut is rotatably mounted on the motor housing and is used to drive a lead screw to move linearly. The displacement sensor includes a sensor mover and a sensor stator. The sensor mover is disposed on the nut, and the sensor stator is fixed relative to the motor housing. The displacement sensor is used to detect the rotational displacement of the nut.

[0009] According to the actuator of the present application embodiment, by setting the sensor mover on the nut, the displacement sensor can directly detect the rotational displacement of the nut, and then calculate the linear displacement of the lead screw, thereby obtaining a more accurate linear displacement result of the lead screw.

[0010] According to some embodiments of this application, the sensor stator is fixed to the motor housing.

[0011] According to some embodiments of this application, the motor housing is provided with a motor stator and a motor mover inside. The motor mover is mounted on the nut, and the motor stator is mounted on the motor housing. The motor housing includes a first bearing mounting seat, and the nut is rotatably supported on the first bearing mounting seat by the first bearing. The displacement sensor is located on the axial side of the motor mover facing the first bearing mounting seat; or, the displacement sensor is located on the axial side of the motor mover away from the first bearing mounting seat.

[0012] According to some embodiments of this application, the motor housing includes a first housing portion and a second housing portion. The first housing portion has a first mounting space, and the second housing portion has a second mounting space. The first bearing mounting seat is disposed in the first housing portion, the displacement sensor is disposed in the first mounting space, and the motor stator and the motor mover are disposed in the second mounting space.

[0013] According to some embodiments of this application, the second housing portion includes a circumferential plate and an end plate, the motor stator is mounted on the circumferential plate, the end plate is connected to the circumferential plate, the end plate extends radially toward the nut, and the sensor stator is mounted on the side of the end plate opposite to the motor stator.

[0014] According to some embodiments of this application, the nut is provided with a first circumferential protrusion, the first circumferential protrusion protrudes outward along the radial direction of the nut, the motor mover is located on one axial side of the first circumferential protrusion, and the sensor mover is located on the side of the first circumferential protrusion opposite to the motor mover.

[0015] According to some embodiments of this application, the end plate is disposed on the circumferential outer side of the first circumferential protrusion, a first annular gap is formed between the end plate and the first circumferential protrusion, and the end plate is spaced apart from the motor actuator.

[0016] According to some embodiments of this application, at least one of the first circumferential protrusion and the end plate is a magnetic shielding plate.

[0017] According to some embodiments of this application, the nut is further provided with a second circumferential protrusion, the second circumferential protrusion protruding outward along the radial direction of the nut, the motor mover is located between the first circumferential protrusion and the second circumferential protrusion, and the motor mover is fixed to at least one of the first circumferential protrusion and the second circumferential protrusion.

[0018] According to some embodiments of this application, the motor housing further includes a third housing portion, which is fixedly connected to the end of the second housing portion away from the first housing portion. The third housing portion includes a second bearing mounting seat, and the nut is rotatably supported on the second bearing mounting seat via the second bearing. The motor mover is located between the first bearing mounting seat and the second bearing mounting seat.

[0019] According to some embodiments of this application, the first housing portion is fixedly connected to one end of the second housing portion near the vehicle body.

[0020] According to some embodiments of this application, the actuator further includes a guide housing, which is connected and fixed to one end of the first housing portion near the vehicle body. The guide housing has a travel space for linear movement of the lead screw, and the travel space is connected to the second mounting space.

[0021] According to some embodiments of this application, the sensor stator is disposed on the circumferential outer side of the sensor mover, and a second annular gap is formed between the sensor stator and the sensor mover.

[0022] According to some embodiments of this application, the motor housing is provided with a lead-out hole, and the displacement sensor further includes a sensor harness, one end of which is connected to the sensor stator, and the other end of which is adapted to pass through the lead-out hole and lead out to the outside of the motor housing.

[0023] According to some embodiments of this application, the displacement sensor is one of a rotary potentiometer, a Hall sensor, an inductive sensor, or a rotary transformer.

[0024] The suspension assembly according to a second aspect of this application includes the actuator described above.

[0025] According to the suspension assembly of the present application embodiment, the actuator sets the sensor mover on the nut, so that the displacement sensor can directly detect the rotational displacement of the nut, and then calculate the linear displacement of the lead screw. The linear displacement result of the lead screw obtained in this way is more accurate.

[0026] The vehicle according to a third aspect of this application includes the suspension assembly described above.

[0027] According to an embodiment of this application, the vehicle's suspension assembly includes an actuator. By mounting a sensor mover on a nut, the displacement sensor can directly detect the rotational displacement of the nut, thereby calculating the linear displacement of the lead screw. The linear displacement result of the lead screw obtained is relatively accurate.

[0028] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0029] Figure 1 is a front view of an actuator according to an embodiment of this application;

[0030] Figure 2 is a cross-sectional view along line AA in Figure 1;

[0031] Figure 3 is a magnified view of part B in Figure 2;

[0032] Figure 4 is a front view of the guide housing, motor housing, and stud structure;

[0033] Figure 5 is a cross-sectional view along line DD in Figure 4;

[0034] Figure 6 is a magnified view of part E in Figure 5;

[0035] Figure 7 is a magnified view of part F in Figure 5;

[0036] Figure 8 is a block diagram of a suspension assembly according to an embodiment of this application;

[0037] Figure 9 is a block diagram of a vehicle according to an embodiment of this application.

[0038] Reference numerals: Vehicle 1000, Suspension assembly 100, Actuator 10, Guide housing 11, Guide housing body 111, Guide housing protrusion 112, First mounting hole 1121, Stroke space 113, Inner circumferential surface of housing 115, Second housing part 12, Motor mounting space 120, Circumferential plate 121, Second lower mounting hole 1211, End plate 122, First bearing mounting seat 123, First axial limiting surface 1231, First circumferential mounting surface 1232, Second through hole 124, Third housing part 13, Housing hole 131, End cover space 132, Second bearing mounting seat 133, Second axial limiting surface 1331, Second circumferential mounting surface 1332, Third mounting hole 135, Mounting cavity 14, First shell Body 15, Lead screw 2, Guide groove 21, Nut 3, First circumferential protrusion 33, Second circumferential protrusion 34, Guide structure 4, Guide rod 41, Ventilation channel 411, First channel section 4111, Second channel section 4112, Sliding bearing 42, Guide ring 43, Mating cavity 5, Motor part 6, Motor stator 61, Motor mover 62, Motor housing 63, Lead hole 631, First positioning surface 81, Second positioning surface 82, Stator mating surface 83, First bearing 91, Second bearing 92, Stud structure 93, Wheel connection structure 94, Elastic support 95, Dust cover 96, Fastener 97, Displacement sensor 98, Sensor stator 981, Sensor mover 982, Sensor wiring harness 983. Detailed Implementation

[0039] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein 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 intended to explain this application, and should not be construed as limiting this application.

[0040] In the description of this application, the terms "first" and "second" 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 as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0041] The actuator 10, the suspension assembly 100 having the actuator 10, and the vehicle 1000 having the suspension assembly 100 according to embodiments of this application are described in detail below with reference to Figures 1-9.

[0042] Referring to FIG1, the actuator 10 according to an embodiment of this application may include: a motor housing 63, a nut 3, and a displacement sensor 98. The nut 3 is rotatably mounted on the motor housing 63 and is used to drive the lead screw 2 to move linearly. Specifically, the nut 3 is screwed to the lead screw 2, and the rotation of the nut 3 can drive the lead screw 2 to move linearly. The displacement sensor 98 includes a sensor mover 982 and a sensor stator 981. The sensor mover 982 is disposed on the nut 3, and the sensor stator 981 is fixed relative to the motor housing 63. The displacement sensor 98 is used to detect the rotational displacement of the nut 3. After the nut 3 and the lead screw 2 are assembled, there is a calculation relationship between the rotation of the nut 3 and the linear displacement of the lead screw 2. According to this calculation relationship, the linear displacement of the lead screw 2 can be calculated from the rotational displacement of the nut 3, thus obtaining a more accurate linear displacement result of the lead screw 2.

[0043] The position of the lead screw 2 can be obtained through the transmission ratio between the nut 3 and the lead screw 2, thus providing accurate position feedback for both the lead screw 2 and the nut 3. Real-time monitoring and correction of the positions of the lead screw 2 and the nut 3 ensure high precision and consistency in position control, thereby achieving active control of the actuator 10. Detecting the actual position using the displacement sensor 98 avoids the accumulation of displacement errors, thereby improving the system's accuracy and sustainability. The displacement sensor 98 is not directly connected to the lead screw 2, resulting in a simple and practical structure that does not affect the actuator's structural layout. The displacement sensor 98 also occupies little space and is easy to maintain.

[0044] The phrase "the sensor stator 981 is relatively fixed to the motor housing 63" means that the sensor stator 981 and the motor housing 63 can move and stop synchronously. For example, when the position of the motor housing 63 is fixed, the position of the sensor stator 981 is also fixed. The sensor stator 981 can be installed on the motor housing 63, or on other components that are fixed in position relative to the motor housing 63.

[0045] The motor housing 63 has a motor mounting space 120 inside. The nut 3 is rotatably mounted in the motor mounting space 120. The displacement sensor 98 is set in the motor mounting space 120. The motor housing 63 can protect the nut 3 and the displacement sensor 98.

[0046] In this application, the arrangement of the sensor mover 982 on the nut 3 does not require a specific shape for the nut 3. It is only necessary to add a feature to fix the sensor mover 982 to one axial end of the nut 3, which has the advantages of convenient installation and simple processing.

[0047] Compared to the related technologies where the displacement sensor is installed on the motor housing and the linear displacement of the lead screw is measured remotely, the actuator 10 according to the embodiment of this application sets the sensor mover 982 on the nut 3, so that the displacement sensor 98 can directly detect the rotational displacement of the nut 3 and then calculate the linear displacement of the lead screw 2. The linear displacement result of the lead screw 2 obtained in this way is more accurate.

[0048] In some embodiments of this application, the sensor stator 981 is fixed to the motor housing 63, thereby eliminating other components between the sensor stator 981 and the motor housing 63, making the actuator 10 simple in structure and facilitating the lightweight design of the actuator 10.

[0049] In some embodiments of this application, the motor housing 63 is provided with a motor stator 61 and a motor mover 62 inside. The motor stator 61 and the motor mover 62 constitute the motor part 6. The motor mover 62 is mounted on the nut 3, and the motor stator 61 is mounted on the motor housing 63. The motor housing 63 includes a first bearing mounting seat 123. The nut 3 is rotatably supported on the first bearing mounting seat 123 by a first bearing 91. In other words, the first bearing 91 is mounted on the first bearing mounting seat 123, and the nut 3 is rotatably supported on the motor housing 63 by the first bearing 91. In this way, the rotation of the nut 3 is smoother and less prone to jamming.

[0050] In some embodiments of this application, referring to Figures 2-3, the motor stator 61 includes a stator core and a stator winding, the stator winding is wound around the stator core, the motor mover 62 is mounted on the nut 3, and the motor mover 62 includes at least a magnetic element. The motor stator 61 is used to excite the motor mover 62 to rotate, so as to drive the nut 3 to rotate.

[0051] The motor stator 61 provides the required excitation magnetic field, and the magnetic component can be a permanent magnet. The motor mover 62 provides a permanently stable magnetic field. The motor mover 62 may also include a cage, on which the magnetic component is mounted.

[0052] In some embodiments of this application, referring to Figures 2-3 and 5, the motor housing 63 has a first positioning surface 81 and a second positioning surface 82 inside. The first positioning surface 81 and the second positioning surface 82 are spaced apart, and a stator mounting space is formed between the first positioning surface 81 and the second positioning surface 82. The motor stator 61 is located between the first positioning surface 81 and the second positioning surface 82. One axial end of the motor stator 61 abuts against the first positioning surface 81, and the other axial end of the motor stator 61 abuts against the second positioning surface 82.

[0053] The stator mating surface 83 is located between the first positioning surface 81 and the second positioning surface 82, and the stator mating surface 83 is used to mount the outer peripheral surface of the motor stator 61. Referring to Figures 2-3, the motor stator 61 is fitted onto the stator mating surface 83. The axial length of the motor stator 61 is equal to the distance between the first positioning surface 81 and the second positioning surface 82, that is, the axial length of the motor stator 61 is equal to the axial length of the stator mating surface 83.

[0054] In some embodiments of this application, the motor stator 61 is press-fitted into the stator mating surface 83 inside the motor housing 63 by an interference fit.

[0055] The first positioning surface 81 and the second positioning surface 82 are disposed opposite to each other. In some embodiments of this application, the first positioning surface 81 and the second positioning surface 82 are parallel to each other.

[0056] In some embodiments of this application, as shown in Figures 2-3 and 5, the first bearing mounting base 123 extends into the motor mounting space 120, so as not to occupy the space outside the motor housing 63.

[0057] The displacement sensor 98 is located on the axial side of the motor rotor 62 facing the first bearing mounting base 123; or, the displacement sensor 98 is located on the axial side of the motor rotor 62 away from the first bearing mounting base 123. Referring to Figures 2-3, the first bearing mounting base 123 is located above the motor rotor 62, and the displacement sensor 98 can be located on the upper side or the lower side of the motor rotor 62.

[0058] In some embodiments of this application, referring to Figures 2-3 and 5, the motor housing 63 has a housing hole 131 for the lead screw 2 to extend out, and the displacement sensor 98 is located on the side of the motor rotor 62 opposite to the housing hole 131; or, the displacement sensor 98 is located on the side of the motor rotor 62 facing the housing hole 131. Referring to Figures 3-4, the housing hole 131 is opened at the lower end of the motor housing 63, and the displacement sensor 98 can be located on the upper side of the motor rotor 62 or on the lower side of the motor rotor 62.

[0059] In some embodiments of this application, referring to Figures 2-7, the motor housing 63 includes a first housing portion 15 and a second housing portion 12. The first housing portion 15 has a first mounting space, and the second housing portion 12 has a second mounting space. A first bearing mounting seat 123 is disposed in the first housing portion 15, a displacement sensor 98 is disposed in the first mounting space, and a motor stator 61 and a motor mover 62 are disposed in the second mounting space. The second mounting space constitutes at least a portion of the motor mounting space 120.

[0060] In some embodiments of this application, the first housing portion 15 and the second housing portion 12 are integral structures.

[0061] In some other embodiments of this application, the first housing portion 15 and the second housing portion 12 are separate structures. The first housing portion 15 and the second housing portion 12 can be connected and fixed by connectors such as bolts and rivets. Designing the first housing portion 15 and the second housing portion 12 as separate structures facilitates the assembly and disassembly of the components inside the first housing portion 15 and the second housing portion 12.

[0062] In some embodiments of this application, referring to Figures 2-3 and 5-6, the second housing portion 12 includes a circumferential plate 121 and an end plate 122. The motor stator 61 is mounted on the circumferential plate 121, and the end plate 122 is connected to the circumferential plate 121. The end plate 122 extends radially toward the nut 3, and the sensor stator 981 is mounted on the side of the end plate 122 opposite to the motor stator 61. For example, the circumferential plate 121 extends axially along the actuator 10, the end plate 122 extends radially along the actuator 10, and the sensor stator 981 is mounted on the upper side of the end plate 122. The end plate 122 serves to separate the sensor stator 981 from the motor stator 61, thereby reducing the interference of the magnetic fields at the motor rotor 62 and the motor stator 61 on the sensor stator 981.

[0063] In some embodiments of this application, referring to Figures 2-3, the nut 3 is provided with a first circumferential protrusion 33, which protrudes outward along the radial direction of the nut 3. The motor mover 62 is located on one axial side of the first circumferential protrusion 33, and the sensor mover 982 is located on the side of the first circumferential protrusion 33 opposite to the motor mover 62. The first circumferential protrusion 33 can limit the axial position of the motor mover 62 and the sensor mover 982 to ensure the accuracy of the relative axial position of the motor mover 62 and the nut 3, and the sensor mover 982 and the nut 3.

[0064] In some embodiments of this application, referring to Figures 2-3, the end plate 122 is disposed on the circumferential outer side of the first circumferential protrusion 33. Therefore, the end plate 122 can fully utilize the radially outer space of the first circumferential protrusion 33, making the internal structure of the motor housing 63 more compact. A first annular gap exists between the end plate 122 and the first circumferential protrusion 33, and the end plate 122 is spaced apart from the motor rotor 62. Therefore, the motor rotor 62 will not contact the end plate 122 when it drives the nut 3 to rotate.

[0065] In some embodiments of this application, at least one of the first circumferential protrusion 33 and the end plate 122 is a magnetic shielding plate. For example, only the first circumferential protrusion 33 is a magnetic shielding plate, or only the end plate 122 is a magnetic shielding plate, or both the first circumferential protrusion 33 and the end plate 122 are magnetic shielding plates. The magnetic shielding plate is made of a material with magnetic shielding properties, such as aluminum or magnesium, and has a magnetic shielding effect. The magnetic shielding plate can reduce the magnetic field leakage of the motor mover 62, thereby weakening the influence of the magnetic field of the motor mover 62 on the measurement accuracy of the displacement sensor 98 and improving the accuracy of the measurement results of the displacement sensor 98. The magnetic shielding plate can also help reduce the eddy current losses of the motor mover 62.

[0066] In some embodiments of this application, the sensor mover 982 is mounted on the first circumferential protrusion 33, the sensor stator 981 is mounted on the end plate 122, and the displacement sensor 98 outputs an electrical signal by detecting the positional changes of the two parts, the sensor mover 982 and the sensor stator 981, thereby realizing the control of the motor part 6 and the entire active suspension assembly.

[0067] In some embodiments of this application, as shown in Figures 2-3, the thickness of the end plate 122 is less than the thickness of the first circumferential protrusion 33. In this way, the end plate 122 will not occupy too much axial space and the probability of contact between the end plate 122 and the nut 3 is reduced.

[0068] In some embodiments of this application, referring to Figures 2-3, the nut 3 is further provided with a second circumferential protrusion 34, which protrudes outward along the radial direction of the nut 3. The motor mover 62 is located between the first circumferential protrusion 33 and the second circumferential protrusion 34. The motor mover 62 is fixed to at least one of the first circumferential protrusion 33 and the second circumferential protrusion 34, thereby realizing the installation of the motor mover 62 on the nut 3. The motor mover 62 is not easy to fall off the nut 3, thus ensuring that the rotation of the motor mover 62 can be better transmitted to the nut 3, and the structure of the actuator 10 is more stable and the safety of use is higher.

[0069] By directly and coaxially nesting the motor mover 62 and the nut 3 together, the axial lengths of the nut 3 and the motor mover 62 are fully coupled, reducing intermediate adapters. The total axial length of the nut 3 and the motor mover 62 is smaller, further compressing the vertical (i.e. axial) dimension space of the lead screw 2, which is more conducive to improving the arrangeability of the lead screw 2 in the whole vehicle.

[0070] In some embodiments of this application, the first circumferential protrusion 33 and the nut 3 may be an integral structure, with the first circumferential protrusion 33 and the nut 3 being integrally formed.

[0071] In some embodiments of this application, the first circumferential protrusion 33 and the nut 3 may also be separate structures. For example, the first circumferential protrusion 33 is a first retaining ring, the nut 3 is provided with a first annular groove, the first retaining ring is installed in the first annular groove, and the first retaining ring protrudes outward from the outer circumferential surface of the nut 3 along the radial direction of the nut 3.

[0072] In some embodiments of this application, the second circumferential protrusion 34 and the nut 3 may be an integral structure, with the second circumferential protrusion 34 and the nut 3 being integrally formed.

[0073] In some embodiments of this application, the second circumferential protrusion 34 and the nut 3 may also be separate structures. For example, the second circumferential protrusion 34 is a second retaining ring, the nut 3 is provided with a second annular groove, the second retaining ring is installed in the second annular groove, and the second retaining ring protrudes outward from the outer circumferential surface of the nut 3 along the radial direction of the nut 3.

[0074] Nut 3 is coaxially fitted with lead screw 2. A helical raceway can be provided on nut 3. Rolling elements are provided in the helical raceway. The rolling elements are in rolling contact with lead screw 2, and power can be transmitted through the rolling elements.

[0075] In some embodiments of this application, the motor housing 63 further includes a third housing portion 13, which is fixedly connected to the end of the second housing portion 12 away from the first housing portion 15, as shown in Figures 1-2, 4, and 5. The third housing portion 13 is fixedly connected to the lower end of the second housing portion 12. The third housing portion 13 includes a second bearing mounting seat 133, and the nut 3 is rotatably supported on the second bearing mounting seat 133 by means of a second bearing 92. The motor mover 62 is located between the first bearing mounting seat 123 and the second bearing mounting seat 133. The first bearing 91 and the second bearing 92 are used to support the rotating nut 3, which can reduce the frictional loss between the nut 3 and the motor housing 63. The second bearing 92 and the first bearing 91 are spaced apart axially from each other in the nut 3, forming a two-point support, thereby allowing the nut 3 to rotate more smoothly.

[0076] In some embodiments of this application, as shown in Figures 2-3, the first bearing 91 and the second bearing 92 can both be angular contact ball bearings, with the first bearing 91 and the second bearing 92 positioned opposite each other. The first bearing 91 and the second bearing 92 are used to support the axial and radial loads of the nut 3 and to provide support for the rotational movement of the nut 3.

[0077] In some embodiments of this application, the first bearing 91 and the second bearing 92 may both be deep groove ball bearings.

[0078] In some embodiments of this application, the third housing portion 13 and the second housing portion 12 can be connected and fixed by connectors such as bolts, rivets, etc.

[0079] In some embodiments of this application, as shown in Figures 2-3 and 5, the first positioning surface 81 and the stator mating surface 83 are both formed on the second housing portion 12, and the second positioning surface 82 is formed on the third housing portion 13.

[0080] In some embodiments of this application, the first housing portion 15 is fixedly connected to the end of the second housing portion 12 near the vehicle body. As shown in Figures 1-2, 4 and 5, the first housing portion 15 is fixedly connected to the upper end of the second housing portion 12, and the third housing portion 13 is fixedly connected to the lower end of the second housing portion 12.

[0081] In some embodiments of this application, referring to Figures 1-2, 4, and 5, the actuator 10 may further include a guide housing 11. The guide housing 11 is connected and fixed to one end of the first housing portion 15 near the vehicle body. The guide housing 11 has a travel space 113 for linear movement of the lead screw 2, and the travel space 113 communicates with the second mounting space. As shown in Figure 2, the guide housing 11 is connected and fixed to the upper end of the first housing portion 15.

[0082] Referring to FIG5, the interior of the third housing portion 13 has an end cover space 132, which is connected to the motor mounting space 120. The stroke space 113, the motor mounting space 120 and the end cover space 132 together form the mounting cavity 14.

[0083] In some embodiments of this application, the guide housing 11 and the first housing portion 15 are an integral structure.

[0084] In some other embodiments of this application, the guide housing 11 and the first housing portion 15 are separate structures. The guide housing 11 and the first housing portion 15 can be connected and fixed by connectors such as bolts and rivets. Designing the guide housing 11 and the first housing portion 15 as separate structures facilitates the assembly and disassembly of the components inside the guide housing 11 and the first housing portion 15.

[0085] In some embodiments of this application, the first housing portion 15 has a second through hole 124 for the lead screw 2 to pass through at one end near the guide housing 11. The first housing portion 15 has a cylindrical structure and a closed end face is provided on the side near the vehicle body. The second through hole 124 is provided at the center of the closed end face. The second through hole 124 cooperates with the opening structure at the bottom of the guide housing 11, so as to connect the motor mounting space 120 and the stroke space 113, so that the lead screw 2 can pass smoothly.

[0086] In some embodiments of this application, referring to Figures 2-3 and 5-7, the first housing portion 15 includes a first housing portion body 151 and a first housing portion end plate 152, the first housing portion body 151 and the first housing portion end plate 152 are connected, the second housing portion 12 is connected to the first housing portion body 151, the guide housing 11 is connected to the first housing portion end plate 152, the second through hole 124 is opened in the first housing portion end plate 152, the second through hole 124 is connected to the motor mounting space 120, and the second through hole 124 is used for the lead screw 2 to pass through.

[0087] In some embodiments of this application, referring to Figures 2-3, 5, and 6, the guide housing 11 includes a guide housing body 111 and a guide housing protrusion 112, which are connected. A travel space 113 is formed within the guide housing body 111. The guide housing protrusion 112 protrudes radially outward from the guide housing body 111 and is connected to the end plate 152 of the first housing portion. The upper end of the guide housing body 111 is adapted to connect with the vehicle body, and the lower end of the guide housing body 111 has an opening structure for connecting the travel space 113 to the first mounting space of the first housing portion 15, allowing the lead screw 2 to pass through.

[0088] Referring to Figures 5-6, the guide housing protrusion 112 is provided with a first mounting hole 1121, and the first housing end plate 152 is provided with a first upper mounting hole 1521. The first mounting hole 1121 and the first upper mounting hole 1521 are at least partially connected. Threaded fasteners pass through the first mounting hole 1121 and the first upper mounting hole 1521 and are fastened to realize the connection and fixation between the guide housing 11 and the first housing part 15.

[0089] In some embodiments of this application, one of the first mounting hole 1121 and the first upper mounting hole 1521 is a smooth hole and the other is a threaded hole, with a screw passing through the smooth hole and fastened to the threaded hole.

[0090] In some embodiments of this application, the first mounting hole 1121 and the first upper mounting hole 1521 are both open holes, as shown in FIG8. After the bolt passes through the two open holes, it is tightened with the fastening nut.

[0091] In some embodiments of this application, the number of first mounting holes 1121 is one, or the number of first mounting holes 1121 is multiple. The number of first mounting holes 1121 is the same as the number of first upper mounting holes 1521, and their positions correspond one-to-one. When there are multiple first mounting holes 1121, the multiple first mounting holes 1121 can be arranged at intervals on the same circle, which facilitates the processing and manufacturing of the first mounting holes 1121, and facilitates the passing of threaded fasteners through the first mounting holes 1121 and the first upper mounting holes 1521 and fastening them.

[0092] Referring to Figures 2-3, 5 and 7, the lower end of the circumferential plate 121 is provided with a second lower mounting hole 1211, and the third housing part 13 is provided with a third mounting hole 135. The second lower mounting hole 1211 and the third mounting hole 135 are at least partially connected. Threaded fasteners pass through the third mounting hole 135 and the second lower mounting hole 1211 and are fastened to achieve the connection and fixation of the second housing part 12 and the third housing part 13.

[0093] In some embodiments of this application, one of the third mounting hole 135 and the second lower mounting hole 1211 is a smooth hole and the other is a threaded hole, with a screw passing through the smooth hole and fastened to the threaded hole.

[0094] In some embodiments of this application, the third mounting hole 135 and the second lower mounting hole 1211 are both open holes, and a bolt is passed through the two open holes and tightened with a fastening nut.

[0095] In some embodiments of this application, the number of third mounting holes 135 is one, or the number of third mounting holes 135 is multiple, and the number of third mounting holes 135 is the same as the number of second lower mounting holes 1211 and their positions correspond one-to-one. When there are multiple third mounting holes 135, the multiple third mounting holes 135 can be arranged at intervals on the same circle, which facilitates the processing and manufacturing of the third mounting holes 135, and facilitates the passing of threaded fasteners through the third mounting holes 135 and the second lower mounting holes 1211 and fastening them.

[0096] In some embodiments of this application, referring to Figures 2-3 and 5-6, a first bearing mounting base 123 is disposed on the end plate 152 of the first housing portion. The first bearing mounting base 123 includes a first axial limiting surface 1231 and a first circumferential mounting surface 1232. The first axial limiting surface 1231 is used to stop and limit one axial end face of the first bearing 91, and the first circumferential mounting surface 1232 is used to mount the outer circumferential surface of the first bearing 91. A second through hole 124 axially penetrates the annular space enclosed by the first circumferential mounting surface 1232. The nut 3 has a first limiting shoulder, which is used to stop and limit the other axial end face of the first bearing 91.

[0097] In some embodiments of this application, referring to Figures 2-3, 5, and 7, a second bearing mounting base 133 is disposed on a third housing portion 13. The second bearing mounting base 133 includes a second axial limiting surface 1331 and a second circumferential mounting surface 1332. The second axial limiting surface 1331 is used to stop and limit the axial end face of the second bearing 92, and the second circumferential mounting surface 1332 is used to mount the outer circumferential surface of the second bearing 92. The housing hole 131 axially penetrates the annular space enclosed by the second circumferential mounting surface 1332. The nut 3 has a second limiting shoulder, which is used to stop and limit the axial end face of the second bearing 92.

[0098] In some embodiments of this application, the sensor stator 981 is located on the circumferential outer side of the sensor mover 982, thereby making full use of the radial space of the actuator 10. There is a second annular gap between the sensor stator 981 and the sensor mover 982, so that when the sensor mover 982 rotates with the nut 3, the sensor stator 981 and the sensor mover 982 will not come into contact or collide, thereby avoiding motion interference.

[0099] In some embodiments of this application, referring to Figures 1-6, the motor housing 63 is provided with a lead-out hole 631, and the displacement sensor 98 further includes a sensor harness 983. One end of the sensor harness 983 is connected to the sensor stator 981, and the other end of the sensor harness 983 is adapted to pass through the lead-out hole 631 and lead out to the outside of the motor housing 63. By providing the lead-out hole 631, it is convenient to transmit the data read by the sensor stator 981 to the outside of the motor housing 63 via the sensor harness 983.

[0100] In some embodiments of this application, the displacement sensor 98 is one of a rotary potentiometer, a Hall sensor, an inductive sensor, or a rotary transformer. For example, in some embodiments of this application, the displacement sensor 98 is a Hall sensor, which detects the displacement or position change of an object based on the Hall effect. The sensor stator 981 uses a Hall element (i.e., a magnetic sensor), and the sensor mover 982 uses a permanent magnet. When the motor mover 62 rotates, the nut 3 mounted on the top of the motor mover 62 rotates synchronously. The magnetic field generated by the sensor mover 982 mounted on the nut 3 also rotates. In the central region of the rotating shaft, the rotating magnetic field remains unchanged. The Hall element detects this magnetic field change, converts it into an electrical signal, and transmits the signal to the control module through a signal processing circuit to control the motor to adjust the vehicle height to achieve a vibration reduction effect. The inductive sensor detects the approach, displacement, or position change of an object based on the change in inductance.

[0101] When using sensors such as Hall sensors and inductive sensors that are greatly affected by external electromagnetic fields, since the lower side of the displacement sensor 98 is the motor part 6, the electromagnetic field of the windings and magnets of the motor part 6 may affect the operation of the displacement sensor 98. The end plate 122 and the first circumferential protrusion 33 on the lower side of the displacement sensor 98 can be made of materials such as aluminum and magnesium that have the effect of shielding electromagnetic fields, so as to act as a shielding layer for external electromagnetic fields.

[0102] The displacement sensor 98 of this application adopts an arrangement of concentric inner and outer rings within the internal space of the motor housing 63, which has the advantages of compact structure, high space utilization, and convenient processing. Furthermore, for sensor types that are highly susceptible to electromagnetic influences, a shielding layer is designed using the actuator 10's own structure, providing arrangement possibilities for different types of displacement sensors 98.

[0103] In some embodiments of this application, referring to Figures 1-2 and 5, a stud structure 93 is provided on the outside of the guide housing 11 for connection with the vehicle body. That is, when connecting the actuator 10 to the vehicle body, this can be achieved through the stud structure 93 on the guide housing 11, thereby reducing the use of intermediate structures and reducing weight. Specifically, when connecting the stud structure 93 to the vehicle body, a fastening nut is used to engage with the stud structure 93 to achieve a secure connection. In some embodiments of this application, the number of stud structures 93 may be one or more.

[0104] Referring to Figures 1-5, the guide housing 11 is a cylindrical structure with a closed end plate on the side near the vehicle body, and the stud structure 93 is disposed on the outer end face of the closed end plate.

[0105] After the guide housing 11 and the motor housing 63 are connected and fixed, they form the actuator housing. As shown in Figures 2-3, a guide structure 4 is provided between the lead screw 2 and the actuator housing. The guide structure 4 is used to guide the lead screw 2 so that the lead screw 2 moves linearly.

[0106] When nut 3 rotates, it drives lead screw 2 to rotate. Since nut 3 is installed in the actuator housing, lead screw 2 will produce linear movement while rotating. That is, lead screw 2 will reciprocate along its axial direction while rotating, such as moving up and down in Figure 2. Guide structure 4 is used to limit and guide lead screw 2. Under the guidance of guide structure 4, the lead screw 2 can be effectively prevented from deviating from its axis during movement, thereby reducing the risk of lead screw 2 wear, abnormal noise, failure, etc., and further enhancing the stability of lead screw 2 during axial reciprocating movement.

[0107] Referring to Figures 1-3, the actuator housing can be used to provide a space for the guide structure 4, the lead screw 2, and the nut 3. In this way, the actuator housing can protect the guide structure 4, the lead screw 2, and the nut 3, reducing the probability of damage to the guide structure 4, the lead screw 2, and the nut 3.

[0108] According to the actuator 10 of the present application embodiment, the guide structure 4 provided between the lead screw 2 and the actuator housing can guide the linear motion of the lead screw 2, which is beneficial to enhance the stability of the lead screw 2 in the process of reciprocating motion along the axial direction. The working principle is reliable, the structure is simple, the machinability is high, and the disassembly and assembly are convenient.

[0109] In some embodiments of this application, referring to Figures 1-3 and 5, the guide structure 4 includes a guide rod 41 connected to the actuator housing. The lead screw 2 has a guide groove 21. When the lead screw 2 moves linearly, the guide rod 41 extends at least partially into the guide groove 21. By setting the guide rod 41 to guide the linear movement of the lead screw 2, the guide rod 41 can guide the linear movement of the lead screw 2, and the working principle is simple and reliable.

[0110] The guide groove 21 runs along the same length as the lead screw 2, and the guide rod 41 engages with the guide groove 21. When the lead screw 2 moves along its own length (i.e., the up-down direction as shown in Figure 2), the guide rod 41 and the guide groove 21 of the lead screw 2 maintain a good fit, thus guiding the linear motion of the lead screw 2. Under the guidance of the guide rod 41, the lead screw 2 is effectively prevented from deviating from its axis during movement, thereby reducing the risks of uneven wear, abnormal noise, and failure. The working principle of the guide rod 41 guiding the lead screw 2 is simple and reliable. Furthermore, the guide rod 41 extends at least partially into the guide groove 21 of the lead screw 2, and does not excessively occupy the internal space of the actuator housing. The guide rod 41 has a high degree of integration with the lead screw 2, and its small space ratio makes the actuator 10 compact.

[0111] The actuator housing has an installation space inside, and the guide rod 41 extends from the actuator housing into the installation space. The specific connection form between the guide rod 41 and the actuator housing depends on the processing technology. For example, the guide rod 41 and the actuator housing can be integrally formed or separate parts that are connected by welding, bonding, bolting or other forms of fastening.

[0112] The guide groove 21 is relatively long, providing space for the relative movement of the guide rod 41 and the lead screw 2. Through the good cooperation between the guide rod 41 and the guide groove 21, the lead screw 2 is vertically guided. The cooperation between the guide rod 41 and the guide groove 21 inside the lead screw 2 avoids long-term wear on the outer circumference of the lead screw 2, reducing the risk of poor screwing connection between the nut 3 and the lead screw 2 due to wear on the outer circumference of the lead screw 2.

[0113] In some embodiments of this application, the projection of the guide rod 41 in a plane perpendicular to its axis is circular, and the projection of the guide groove 21 in a plane perpendicular to its axis is adapted to the guide rod 41. Thus, while the guide rod 41 guides the lead screw 2 vertically, it does not affect the circumferential rotation of the lead screw 2, ensuring a good threaded connection between the lead screw 2 and the nut 3, and increasing the operational stability of the entire actuator 10 mechanism.

[0114] In some embodiments of this application, the depth of the guide groove 21 is greater than the travel distance of the lead screw 2 in the linear movement direction of the lead screw 2. This ensures that the lead screw 2 will not interfere with the guide rod 41 within its travel distance.

[0115] In some embodiments of this application, the length of the guide rod 41 is less than or equal to the travel of the lead screw 2. Furthermore, since the depth of the guide groove 21 is greater than the travel of the lead screw 2, the length of the guide rod 41 is less than the depth of the guide groove 21. Therefore, the guide rod 41 will not collide with the bottom of the guide groove 21, meaning that the guide rod 41 and the lead screw 2 will not interfere with each other's movement.

[0116] In some embodiments of this application, referring to FIG2, the actuator housing has an internal mounting cavity 14, the nut 3 is located in the mounting cavity 14, and a mating cavity 5 is formed between the end of the guide rod 41 that extends into the guide groove 21 and the bottom of the guide groove 21. The guide rod 41 is provided with a ventilation channel 411, which connects the mating cavity 5 and the mounting cavity 14. When the mating cavity 5 is a closed cavity (i.e., the guide rod 41 does not have a ventilation channel 411), the gas in the mating cavity 5 generates a large damping force due to frequent compression by the guide rod 41, thus hindering the movement of the guide rod 41 within the guide groove 21. The ventilation channel 411 provided on the guide rod 41 can reduce the damping force generated by frequent compression of the gas in the mating cavity 5, resulting in less resistance when the guide rod 41 moves within the guide groove 21.

[0117] In some embodiments of this application, referring to Figures 2 and 5, the guide structure 4 further includes a sliding bearing 42, which is disposed at the guide engagement point between the guide rod 41 and the guide groove 21. The sliding bearing 42 is mounted on the inner peripheral wall of the guide groove 21, and its inner peripheral surface engages with the outer peripheral wall of the guide rod 41. The sliding bearing 42 can at least partially separate the guide rod 41 from the guide groove 21, thereby preventing direct contact between the guide rod 41 and the guide groove 21 and resulting in wear. The sliding bearing 42 serves to guide the sliding motion and reduce sliding friction resistance, which is beneficial to improving the running stability of the lead screw 2.

[0118] In some embodiments of this application, the outer peripheral surface of the sliding bearing 42 and the inner peripheral wall of the guide groove 21 are interference fits, which ensures that the sliding bearing 42 can be firmly installed in the guide groove 21; and / or, the inner peripheral surface of the sliding bearing 42 and the outer peripheral wall of the guide rod 41 are clearance fits, which ensures that the lead screw 2 can move smoothly.

[0119] In some embodiments of this application, referring to Figures 2-3, the outer diameter of the guide rod 41 is smaller than the inner diameter of the guide groove 21. The outer peripheral wall of the guide rod 41 and the inner peripheral wall of the guide groove 21 are separated by a sliding bearing 42. One end of the ventilation channel 411 is connected to the outer peripheral wall of the guide rod 41, thereby connecting the ventilation channel 411 to the mounting cavity 14. The other end of the ventilation channel 411 is connected to the end face of the guide rod 41 that extends into the guide groove 21, thereby connecting the other end of the ventilation channel 411 to the mating cavity 5.

[0120] In the examples of Figures 2 and 3, the ventilation channel 411 is in the form of two sections, and the ventilation channel 411 includes a first channel section 4111 and a second channel section 4112. The lower end of the guide rod 41 extends into the guide groove 21. One end of the first channel section 4111 is connected to the lower end face of the guide rod 41 and is connected to the mating cavity 5. The other end of the first channel section 4111 is connected to the second channel section 4112. The other end of the second channel section 4112 is connected to the outer peripheral wall of the guide rod 41 and is connected to the mounting cavity 14.

[0121] In some embodiments not shown in the figure, the shape of the ventilation channel 411 can also be arc-shaped, three-section, corrugated, etc.

[0122] In some embodiments of this application, referring to Figures 2-3, the actuator housing has an inner circumferential surface 115, which is opposite to the outer circumferential surface of the lead screw 2. The guide structure 4 includes a guide ring 43, the inner circumferential surface of which is mounted on the outer circumferential surface of the lead screw 2, and the outer circumferential surface of which is slidably engaged with the inner circumferential surface 115 of the housing. During linear movement of the lead screw 2, the guide ring 43 slides along the inner circumferential surface 115 of the housing, providing sliding guidance. The guide ring 43 guides the linear movement of the lead screw 2, effectively preventing the lead screw 2 from deviating from its axis during movement, thereby reducing the risks of lead screw 2 wear, abnormal noise, and failure, and further enhancing the operational stability of the lead screw 2 during axial reciprocating motion.

[0123] In some embodiments of this application, the guide structure 4 of the actuator 10 can be one of the guide rod 41 and the guide ring 43, or the guide rod 41 and the guide ring 43 can be provided simultaneously to achieve dual guidance.

[0124] In some embodiments of this application, referring to Figures 1-2, the stud structure 93 provided on the guide housing 11 is a vehicle body connection structure, the actuator 10 also includes a wheel connection structure 94, one end of the lead screw 2 is located inside the actuator housing, and the other end of the lead screw 2 is adapted to extend outside the actuator housing to be connected to the wheel through the wheel connection structure 94, and the actuator housing is adapted to be connected to the vehicle body through the stud structure 93.

[0125] Referring to Figure 2, the wheel connection structure 94 is a lower fork arm. The lower fork arm is connected and fixed to the lead screw 2 by fasteners 97. The lower fork arm is used to connect the lead screw 2 and the wheel end. The lead screw 2 drives the lower fork arm to move linearly together, thereby realizing the control of the position of the wheel end.

[0126] In some embodiments of this application, the fastener 97 is a screw, and the lower end of the lead screw 2 is provided with a threaded hole. After the screw passes through the lower fork arm, it is tightened into the threaded hole to achieve a fast connection between the lower fork arm and the lead screw 2.

[0127] In some embodiments of this application, the fastener 97 is a bolt, the lower end of the lead screw 2 is provided with a light hole, and the screw passes through the light hole of the lower fork arm and the lead screw 2 and is tightened with the nut 3 to achieve a tight connection between the lower fork arm and the lead screw 2.

[0128] This application provides a coaxial parallel fully active control actuator 10 for fully active control of the relative distance between the wheels and the vehicle body to meet the personalized needs of the vehicle for different height states. The working principle of the actuator 10 is as follows: After being energized, the motor mover 62 rotates, driving the nut 3 to rotate. The lead screw 2 converts the rotational motion of the nut 3 into the linear motion of the lead screw 2. Furthermore, the lead screw 2 drives the lower fork arm to perform linear motion, thereby realizing real-time control of the wheel height to meet the real-time needs of the vehicle body height adjustment.

[0129] In some embodiments of this application, referring to Figures 1-2, the actuator 10 further includes an elastic support 95. The elastic support 95 is sleeved outside the lead screw 2 and is located between the wheel connection structure 94 and the actuator housing. One end of the elastic support 95 is connected to the actuator housing, and the other end is connected to the wheel connection structure 94. The elastic support 95 is used to bear part of the vehicle body weight, reducing the active thrust required by the actuator 10. Referring to Figures 1-2, the elastic support 95 can be a coil spring.

[0130] In some embodiments of this application, referring to Figures 1-2, the actuator 10 further includes a dust cover 96. The dust cover 96 is sleeved on the outside of the lead screw 2 and is located between the wheel connection structure 94 and the actuator housing. The actuator housing has a housing hole 131 for the lead screw 2 to extend out, and the dust cover 96 has a dustproof space, with the housing hole 131 located within the dustproof space. The dust cover 96 is used to isolate the actuator 10 from external impurities such as water and dust. For example, the dust cover 96 can prevent external moisture, dust, and debris from entering the mounting cavity 14 inside the actuator housing through the housing hole 131.

[0131] The principle of the active actuation of the entire actuator 10 is as follows: the stator 61 of the motor 6 drives the motor mover 62 to rotate, the motor mover 62 drives the nut 3 to rotate, the nut 3 drives the lead screw 2 to rotate and the lead screw 2 moves linearly, realizing the conversion between rotational motion and linear motion. The guide structure 4 strictly restricts the movement of the lead screw 2 to the vertical direction. Through the control strategy, the relative distance between the wheel and the vehicle body is dynamically adjusted in real time to meet the needs of vehicle 1000 driving comfort.

[0132] Referring to FIG8, the suspension assembly 100 according to a second aspect embodiment of the present application includes the actuator 10 of the above embodiment.

[0133] According to the suspension assembly 100 of the present application embodiment, the actuator 10 sets the sensor mover 982 on the nut 3, so that the displacement sensor 98 can directly detect the rotational displacement of the nut 3, and then calculate the linear displacement of the lead screw 2. The linear displacement result of the lead screw 2 obtained in this way is more accurate.

[0134] The suspension assembly 100, as a system connecting the wheel end and the vehicle body end, serves to support the vehicle body and mitigate road impacts. By providing the actuator 10 of the above embodiment, suspension height adjustment can be achieved, thereby realizing a high degree of vehicle passability.

[0135] Referring to FIG9, the vehicle 1000 according to a third aspect embodiment of the present application includes the suspension assembly 100 of the above embodiment.

[0136] According to the embodiment of this application, the vehicle 1000 has a suspension assembly 100 including an actuator 10. By setting the sensor mover 982 on the nut 3, the displacement sensor 98 can directly detect the rotational displacement of the nut 3, and then calculate the linear displacement of the lead screw 2. The linear displacement result of the lead screw 2 obtained is relatively accurate.

[0137] In the description of this application, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0138] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0139] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0140] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. An actuator (10), wherein, include: Motor housing (63); Nut (3), rotatably mounted on the motor housing (63), the nut (3) being used to drive the lead screw (2) to move linearly; and The displacement sensor (98) includes a sensor mover (982) and a sensor stator (981). The sensor mover (982) is disposed on the nut (3), and the sensor stator (981) is fixed relative to the motor housing (63). The displacement sensor (98) is used to detect the rotational displacement of the nut (3).

2. The actuator (10) according to claim 1, wherein, The sensor stator (981) is fixed to the motor housing (63).

3. The actuator (10) according to claim 1 or 2, wherein, The motor housing (63) is provided with a motor stator (61) and a motor mover (62) inside. The motor mover (62) is installed on the nut (3), and the motor stator (61) is installed on the motor housing (63). The motor housing (63) includes a first bearing mounting seat (123). The nut (3) is rotatably supported on the first bearing mounting seat (123) by a first bearing (91). The displacement sensor (98) is located on the axial side of the motor mover (62) facing the first bearing mount (123); or, the displacement sensor (98) is located on the axial side of the motor mover (62) away from the first bearing mount (123).

4. The actuator (10) according to claim 3, wherein, The motor housing (63) includes a first housing portion (15) and a second housing portion (12). The first housing portion (15) has a first mounting space, and the second housing portion (12) has a second mounting space. The first bearing mounting seat (123) is disposed in the first housing portion (15), the displacement sensor (98) is disposed in the first mounting space, and the motor stator (61) and the motor mover (62) are disposed in the second mounting space.

5. The actuator (10) according to claim 4, wherein, The second housing portion (12) includes a circumferential plate (121) and an end plate (122). The motor stator (61) is mounted on the circumferential plate (121), and the end plate (122) is connected to the circumferential plate (121). The end plate (122) extends radially toward the nut (3), and the sensor stator (981) is mounted on the side of the end plate (122) opposite to the motor stator (61).

6. The actuator (10) according to claim 5, wherein, The nut (3) is provided with a first circumferential protrusion (33), which protrudes outward along the radial direction of the nut (3). The motor mover (62) is located on one axial side of the first circumferential protrusion (33), and the sensor mover (982) is located on the side of the first circumferential protrusion (33) away from the motor mover (62).

7. The actuator (10) according to claim 6, wherein, The end plate (122) is located on the circumferential outer side of the first circumferential protrusion (33), and there is a first annular gap between the end plate (122) and the first circumferential protrusion (33). The end plate (122) is spaced apart from the motor mover (62).

8. The actuator (10) according to claim 6 or 7, wherein, At least one of the first circumferential protrusion (33) and the end plate (122) is a magnetic shielding plate.

9. The actuator (10) according to any one of claims 6-8, wherein, The nut (3) is also provided with a second circumferential protrusion (34), which protrudes outward along the radial direction of the nut (3). The motor mover (62) is located between the first circumferential protrusion (33) and the second circumferential protrusion (34), and the motor mover (62) is fixed to at least one of the first circumferential protrusion (33) and the second circumferential protrusion (34).

10. The actuator (10) according to any one of claims 4-9, wherein, The motor housing (63) further includes a third housing portion (13), which is fixedly connected to the end of the second housing portion (12) away from the first housing portion (15). The third housing portion (13) includes a second bearing mounting seat (133), and the nut (3) is rotatably supported on the second bearing mounting seat (133) by means of a second bearing (92). The motor mover (62) is located between the first bearing mounting seat (123) and the second bearing mounting seat (133).

11. The actuator (10) according to any one of claims 4-10, wherein, The first housing part (15) is fixedly connected to the end of the second housing part (12) near the vehicle body.

12. The actuator (10) according to claim 11, wherein, The actuator (10) further includes a guide housing (11), which is connected and fixed to one end of the first housing part (15) near the vehicle body. The guide housing (11) has a travel space (113) for linear movement of the lead screw (2), and the travel space (113) is connected to the second mounting space.

13. The actuator (10) according to any one of claims 1-12, wherein, The sensor stator (981) is located on the circumferential outer side of the sensor mover (982), and there is a second annular gap between the sensor stator (981) and the sensor mover (982).

14. The actuator (10) according to any one of claims 1-13, wherein, The motor housing (63) is provided with a lead-out hole (631). The displacement sensor (98) also includes a sensor harness (983). One end of the sensor harness (983) is connected to the sensor stator (981), and the other end of the sensor harness (983) is adapted to pass through the lead-out hole (631) and lead out to the outside of the motor housing (63).

15. The actuator (10) according to any one of claims 1-14, wherein, The displacement sensor (98) is one of the following: a rotary potentiometer, a Hall sensor, an inductive sensor, or a rotary transformer.

16. A suspension assembly (100), wherein, The actuator (10) includes any one of claims 1-15.

17. A vehicle (1000), wherein, Includes the suspension assembly (100) as described in claim 16.

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