Actuator, suspension assembly and vehicle

Abstract

A vehicle, comprising a suspension assembly which comprises an actuator. The actuator comprises an electric motor portion and a displacement sensor, wherein the electric motor portion comprises an electric motor rotor and an electric motor stator, the electric motor rotor being adapted to rotate relative to the electric motor stator; and the displacement sensor comprises a sensor magnetic ring and a sensor reading head, the sensor magnetic ring being fixed relative to the electric motor rotor, and the sensor reading head being fixed relative to the electric motor stator.

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 202410679768.X, 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, actuators include a motor structure and a displacement sensor. The motor is used to drive the lead screw to move linearly to adjust the distance between the vehicle body and the wheels, and the displacement sensor is used to detect the linear displacement of the lead screw. However, the displacement sensor in the existing actuator is inconvenient to install and requires multiple positioning. Summary of the Invention

[0005] This application aims to at least partially address one of the aforementioned technical problems in the prior art. To this end, this application proposes an actuator that facilitates the installation of a displacement sensor.

[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] An actuator according to an embodiment of this application includes: a motor part and a displacement sensor. The motor part includes a motor mover and a motor stator, the motor mover being adapted to rotate relative to the motor stator. The displacement sensor includes a sensor magnetic ring and a sensor reading head, the sensor magnetic ring being fixed relative to the motor mover, and the sensor reading head being fixed relative to the motor stator.

[0009] According to the actuator of the present application embodiment, by selecting a displacement sensor including a sensor magnetic ring and a sensor read head, the installation of the displacement sensor is facilitated.

[0010] According to some embodiments of this application, the sensor magnetic ring is coaxially arranged with the motor stator.

[0011] According to some embodiments of this application, the actuator further includes a magnetic shielding plate disposed between the motor part and the displacement sensor, and the sensor magnetic ring is located on the side of the magnetic shielding plate opposite to the motor part.

[0012] According to some embodiments of this application, the magnetic shielding plate includes a first magnetic shielding plate, which is connected and fixed to the motor mover. The first magnetic shielding plate is spaced apart from the sensor reading head, and the sensor magnetic ring is located on the side of the first magnetic shielding plate opposite to the motor mover.

[0013] According to some embodiments of this application, the sensor magnetic ring is connected and fixed to the motor rotor, or the sensor reading head is adapted to be connected and fixed to the first magnetic shielding plate, or the sensor reading head is adapted to be simultaneously connected and fixed to the motor rotor and the first magnetic shielding plate.

[0014] According to some embodiments of this application, the magnetic shielding plate includes a second magnetic shielding plate, which is mounted on the motor stator and is adapted to be spaced apart from the first magnetic shielding plate and the motor mover.

[0015] According to some embodiments of this application, the sensor reading head is adapted to be connected and fixed to the motor stator, or the sensor reading head is adapted to be connected and fixed to the second magnetic shielding plate, or the sensor reading head is adapted to be simultaneously connected and fixed to the motor stator and the second magnetic shielding plate.

[0016] According to some embodiments of this application, the second magnetic shielding plate is located radially outside the first magnetic shielding plate.

[0017] According to some embodiments of this application, the actuator further includes a nut, the nut having a first circumferential protrusion that protrudes radially outward from the nut, the motor actuator being mounted on the nut and located on one axial side of the first circumferential protrusion, and the magnetic shielding plate being located radially outward from the first circumferential protrusion.

[0018] According to some embodiments of this application, the sensor read head is located radially outside the sensor magnetic ring.

[0019] According to some embodiments of this application, the actuator further includes a motor housing, the motor housing having a motor mounting space inside, the motor part, the sensor magnetic ring and the sensor reading head being disposed in the motor mounting space, the motor housing having a lead-out hole, the displacement sensor further including a sensor harness, one end of the sensor harness being connected to the sensor reading head, and the other end of the sensor harness being adapted to pass through the lead-out hole to the outside of the motor housing.

[0020] According to some embodiments of this application, the motor housing has a housing hole for the lead screw to extend in the direction of the wheel, and the displacement sensor is located on the side of the motor actuator opposite to the housing hole; or the displacement sensor is located on the side of the motor actuator facing the housing hole.

[0021] According to some embodiments of this application, the actuator further includes a stator positioning ring and a magnetic shielding plate. The interior of the motor housing has a first positioning surface and a second positioning surface. The motor stator and the stator positioning ring are located between the first positioning surface and the second positioning surface. One axial end of the stator positioning ring abuts against the first positioning surface, and the other axial end of the stator positioning ring abuts against the motor stator. The axial end of the motor stator away from the magnetic shielding plate abuts against the second positioning surface. The displacement sensor is located between the first positioning surface and the magnetic shielding plate.

[0022] According to some embodiments of this application, the actuator further includes a lead screw, a nut, and a first bearing. The motor mover is mounted on the nut. The motor housing includes a first bearing mounting seat. The first bearing is mounted on the first bearing mounting seat. One end of the nut is rotatably supported on the motor housing via the first bearing. The nut is screwed to the lead screw. When the nut rotates, it can drive the lead screw to move linearly. 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.

[0023] According to some embodiments of this application, the actuator further includes a second bearing, the motor housing further includes a second bearing mounting base, and the other end of the nut is rotatably supported on the motor housing by the second bearing, the second bearing being axially spaced from the first bearing in the nut.

[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 uses a displacement sensor including a sensor magnetic ring and a sensor read head, which facilitates the installation of the displacement sensor.

[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, and the installation of the displacement sensor is facilitated by selecting a displacement sensor that includes a sensor magnetic ring and a sensor read head.

[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 perspective view of an actuator according to an embodiment of this application;

[0030] Figure 2 is a front view of an actuator according to an embodiment of this application;

[0031] Figure 3 is a cross-sectional view along line AA in Figure 2;

[0032] Figure 4 is a magnified view of part B in Figure 3;

[0033] Figure 5 is a three-dimensional schematic diagram of the first housing, the motor housing, the guide structure and the stud structure;

[0034] Figure 6 is a front view of the first housing, the motor housing, and the stud structure;

[0035] Figure 7 is a cross-sectional view along line DD in Figure 6;

[0036] Figure 8 is a magnified view of part E in Figure 7;

[0037] Figure 9 is a magnified view of part F in Figure 7;

[0038] Figure 10 is a three-dimensional schematic diagram of the displacement sensor.

[0039] Figure 11 is a three-dimensional schematic diagram of the magnetic shielding plate;

[0040] Figure 12 is a schematic diagram showing the displacement sensor positioned below the motor section;

[0041] Figure 13 is a magnified view of a portion of point G in Figure 12;

[0042] Figure 14 is a schematic diagram of a suspension assembly according to an embodiment of this application;

[0043] Figure 15 is a block diagram of a vehicle according to an embodiment of this application.

[0044] Reference numerals: Vehicle 1000, Suspension assembly 100, Actuator 10, First housing 11, First housing body 111, First housing protrusion 112, First mounting hole 1121, Travel space 113, Inner circumferential surface of housing 115, Second housing 12, Motor mounting space 120, Second housing body 121, Second lower mounting hole 1211, Second housing end plate 122, Second upper mounting hole 1221, First bearing mounting seat 123, First axial limit Surface 1231, First circumferential mounting surface 1232, Second through hole 124, Third housing 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, Lead screw 2, Guide groove 21, Nut 3, First limiting shoulder 31, Second limiting shoulder 32, 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 structure 60, motor part 6. Motor stator 61, motor mover 62, motor housing 63, lead-out hole 631, stator positioning ring 7. First positioning surface 81, second positioning surface 82, stator mating surface 83, first bearing 91, second bearing 92, stud structure 93, wheel connection Component 94, elastic support 95, dust cover 96, fastener 97, displacement sensor 98, sensor read head 981, read head fixing hole 9811, sensor magnetic ring 982, magnetic ring fixing hole 9821, sensor wiring harness 983, magnetic shielding plate 99, first magnetic shielding plate 991, first magnetic shielding first fixing hole 9911, first magnetic shielding second fixing hole 9912, second magnetic shielding plate 992, second magnetic shielding fixing hole 9921, magnetic shielding center hole 993. Detailed Implementation

[0045] 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.

[0046] 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.

[0047] 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 1-15.

[0048] Referring to Figures 1-3 and Figure 10, the actuator 10 according to an embodiment of this application may include: a motor unit 6 and a displacement sensor 98.

[0049] The motor unit 6 includes a motor mover 62 and a motor stator 61. The motor mover 62 is adapted to rotate relative to the motor stator 61. The displacement sensor 98 is used to detect the rotational displacement of the motor mover 62. The displacement sensor 98 includes a sensor magnetic ring 982 and a sensor reading head 981. The sensor magnetic ring 982 is fixed relative to the motor mover 62, and the sensor reading head 981 is fixed relative to the motor stator 61.

[0050] The phrase "the sensor magnetic ring 982 is relatively fixed to the motor mover 62" means that the sensor magnetic ring 982 and the motor mover 62 can move and stop synchronously. For example, when the motor mover 62 rotates, the sensor magnetic ring 982 rotates synchronously with the motor mover 62; when the motor mover 62 stops rotating, the sensor magnetic ring 982 stops rotating synchronously with the motor mover 62. In this way, the displacement sensor 98 can accurately detect the rotational displacement of the motor mover 62. The sensor magnetic ring 982 can be installed on the motor mover 62 or on other components that are fixed in a relative position to the motor mover 62.

[0051] The phrase "the sensor head 981 is relatively fixed to the motor stator 61" means that the sensor head 981 and the motor stator 61 can move and stop synchronously. For example, when the position of the motor stator 61 is fixed, the position of the sensor head 981 is also fixed. The sensor head 981 can be installed on the motor stator 61 or on other components that are fixed in position relative to the motor stator 61.

[0052] In some embodiments of this application, the displacement sensor 98 is an off-axis magnetic encoder, and the sensor magnetic ring 982 can be magnetized radially or axially. When the motor mover 62 rotates, the sensor magnetic ring 982 rotates synchronously, and the magnetic field generated by the sensor magnetic ring 982 also rotates. The sensor read head 981 detects the change in the magnetic field, determines the change in the position of the sensor magnetic ring 982, that is, the change in the position of the motor mover 62, and then transmits the signal to the control module through the signal processing circuit.

[0053] In related technologies, displacement sensors include a sensor ring stator and a sensor ring mover. The installation of the sensor ring stator is inconvenient and requires multiple positioning methods. According to the actuator 10 of this application embodiment, by selecting a displacement sensor 98 including a sensor magnetic ring 982 and a sensor read head 981, the installation of the displacement sensor 98 is facilitated.

[0054] In some embodiments of this application, referring to Figures 3-4, the sensor magnetic ring 982 is coaxially arranged with the motor stator 61. The motor stator 61 is also coaxially arranged with the motor rotor 62. Therefore, the motor rotor 62, the sensor magnetic ring 982, and the motor stator 61 are coaxially arranged. In other words, the motor rotor 62, the sensor magnetic ring 982, and the motor stator 61 are all rotating bodies, and their axes coincide. As a result, when the motor rotor 62 and the sensor magnetic ring 982 rotate synchronously, their rotation centers are the same, resulting in better dynamic balance, which is beneficial to improving the working performance of the actuator 10.

[0055] In some embodiments of this application, the actuator 10 further includes a magnetic shielding plate 99, which is disposed between the motor unit 6 and the displacement sensor 98. A sensor magnetic ring 982 is located on the side of the magnetic shielding plate 99 facing away from the motor unit 6. Referring to Figures 3-4, the magnetic shielding plate 99 is located above the motor unit 6, and the sensor magnetic ring 982 is located above the magnetic shielding plate 99. In some embodiments, referring to Figures 12-13, the magnetic shielding plate 99 may be located below the motor unit 6, and the sensor magnetic ring 982 may be located below the magnetic shielding plate 99. That is, the positions of the magnetic shielding plate 99 and the displacement sensor 98 can be adjusted from above the motor unit 6 in Figures 3-4 to below the motor unit 6 in Figures 12-13.

[0056] The magnetic shielding plate 99 isolates the motor rotor 62 from the displacement sensor 98. Made of a magnetically shielding material such as aluminum or magnesium, the magnetic shielding plate 99 reduces magnetic field leakage from the motor rotor 62, thereby mitigating the impact of the motor rotor 62's magnetic field on the measurement accuracy of the displacement sensor 98 and improving the accuracy of the displacement sensor's measurement results. The magnetic shielding plate 99 also helps reduce eddy current losses in the motor rotor 62.

[0057] In some embodiments of this application, the magnetic shielding plate 99 can be an aluminum plate, which is lightweight and low in cost.

[0058] In some embodiments of this application, referring to Figures 3-4 and Figure 11, the magnetic shielding plate 99 includes a first magnetic shielding plate 991, which is fixedly connected to the motor rotor 62. The first magnetic shielding plate 991 is spaced apart from the sensor reading head 981, thereby preventing the first magnetic shielding plate 991 from colliding with the sensor reading head 981 when rotating synchronously with the motor rotor 62. The sensor magnetic ring 982 is located on the side of the first magnetic shielding plate 991 facing away from the motor rotor 62, and the first magnetic shielding plate 991 can isolate the motor rotor 62 from the sensor magnetic ring 982.

[0059] In some embodiments of this application, the sensor magnetic ring 982 is connected and fixed to the motor mover 62, or the sensor magnetic ring 982 is connected and fixed to the first magnetic shielding plate 991, or the sensor magnetic ring 982 is simultaneously connected and fixed to both the motor mover 62 and the first magnetic shielding plate 991.

[0060] For example, in the embodiments shown in Figures 3-4 and 10-11, the sensor magnetic ring 982 is connected and fixed to the first magnetic shielding plate 991. The first magnetic shielding plate 991 has a first magnetic shielding first fixing hole 9911, and the sensor magnetic ring 982 has a magnetic ring fixing hole 9821. A first fastener passes through the magnetic ring fixing hole 9821 and is fastened to the first magnetic shielding first fixing hole 9911, thereby achieving the connection and fixation between the sensor magnetic ring 982 and the first magnetic shielding plate 991. The first magnetic shielding plate 991 also has a first magnetic shielding second fixing hole 9912. A second fastener passes through the first magnetic shielding second fixing hole 9912 and is fastened to the motor rotor 62, thereby achieving the connection and fixation between the first magnetic shielding plate 991 and the motor rotor 62. Thus, when the motor rotor 62 rotates, it will drive the first magnetic shielding plate 991 and the sensor magnetic ring 982 to rotate synchronously.

[0061] In some embodiments of this application, the first magnetic isolation second fixing hole 9912 and the first magnetic isolation second fixing hole 9912 can be the same hole, namely the first magnetic isolation fixing hole. In this way, the fastener passes through the magnetic ring fixing hole 9821 and the first magnetic isolation fixing hole and is fastened to the motor mover 62, thereby realizing the connection and fixation of the sensor magnetic ring 982, the first magnetic isolation plate 991 and the motor mover 62.

[0062] In some embodiments of this application, the sensor magnetic ring 982 is connected and fixed to the motor mover 62; or, a part of the sensor magnetic ring 982 is connected and fixed to the motor mover 62, and another part is connected and fixed to the first magnetic shielding plate 991.

[0063] In some embodiments of this application, referring to Figures 3-4 and Figure 11, the magnetic shielding plate 99 includes a second magnetic shielding plate 992, which is mounted on the motor stator 61 and is adapted to be spaced apart from the first magnetic shielding plate 991 and the motor rotor 62. Of course, the second magnetic shielding plate 992 can also be mounted on other components fixedly connected to the motor stator 61.

[0064] In some embodiments of this application, the sensor read head 981 is adapted to be connected and fixed to the motor stator 61, or the sensor read head 981 is adapted to be connected and fixed to the second magnetic shielding plate 992, or the sensor read head 981 is adapted to be simultaneously connected and fixed to the motor stator 61 and the second magnetic shielding plate 992. In the examples shown in Figures 3-4 and 10-11, the sensor read head 981 is connected and fixed to the second magnetic shielding plate 992. The sensor read head 981 has a read head fixing hole 9811, and the second magnetic shielding plate 992 has a second magnetic shielding fixing hole 9921. A third fastener passes through the read head fixing hole 9811 and is fastened to the second magnetic shielding fixing hole 9921, thereby realizing the connection and fixation of the sensor read head 981 and the second magnetic shielding plate 992. In some embodiments not shown in the figures, the sensor read head 981 can be connected and fixed to the motor stator 61.

[0065] The terms "fastener," "first fastener," "second fastener," and "third fastener" as used in this application refer to components used to connect multiple parts, such as screws, rivets, bolts, etc.

[0066] In some embodiments of this application, as shown in Figures 3-4 and 11, the second magnetic shielding plate 992 is located radially outside the first magnetic shielding plate 991, thereby making reasonable use of radial space and making the structure compact.

[0067] In some embodiments of this application, referring to Figures 3-4, the actuator 10 further includes a nut 3. The nut 3 has a first circumferential protrusion 33, which protrudes radially outward along the nut 3. A motor mover 62 is mounted on the nut 3 and is located on one axial side of the first circumferential protrusion 33. The first circumferential protrusion 33 can limit the axial position of the motor mover 62 to ensure accurate relative axial position between the motor mover 62 and the nut 3. A magnetic shielding plate 99 is located radially outside the first circumferential protrusion 33. Thus, the magnetic shielding plate 99 can fully utilize the radially outer space of the first circumferential protrusion 33, making the internal structure of the actuator 10 more compact.

[0068] In some embodiments of this application, as shown in Figures 3-4, the thickness of the magnetic shielding plate 99 is less than the thickness of the first circumferential protrusion 33. In this way, the magnetic shielding plate 99 will not occupy too much axial space, which is beneficial to improving the compactness of the internal structure of the motor housing 63.

[0069] In some embodiments of this application, referring to Figures 3-4, 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.

[0070] 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.

[0071] 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.

[0072] 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.

[0073] 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.

[0074] 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.

[0075] 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.

[0076] In some embodiments of this application, referring to Figures 3-4 and Figure 10, the sensor read head 981 is located radially outside the sensor magnetic ring 982. This allows for efficient use of the radial space of the actuator 10. Furthermore, the sensor read head 981 is directly opposite the sensor magnetic ring 982 along the radial direction of the magnetic ring, enabling the sensor read head 981 to better detect changes in the magnetic field and determine changes in the position of the sensor magnetic ring 982. When the axis of the actuator 10 is arranged along the height direction of the vehicle 1000, the sensor read head 981 and the sensor magnetic ring 982 are arranged at the same horizontal height, which further facilitates full utilization of the radial space of the actuator 10.

[0077] In some embodiments of this application, referring to Figures 1-8, the actuator 10 further includes a motor housing 63. The motor part 6 and the motor housing 63 constitute a motor structure 60. The motor housing 63 has a motor mounting space 120 inside. The motor part 6, the sensor magnetic ring 982, and the sensor reading head 981 are disposed within the motor mounting space 120. The motor housing 63 can protect the motor part 6, the sensor magnetic ring 982, and the sensor reading head 981. The motor stator 61 is mounted on the motor housing 63, thus the motor stator 61 and the motor housing 63 are relatively fixed. Furthermore, compared to the related art where the displacement sensor is placed outside the motor housing 63, in this application, the displacement sensor 98 is disposed inside the motor housing 63, so that the displacement sensor 98 can be closer to the motor mover 62, which is beneficial to improving the accuracy of the displacement sensor 98 in detecting the rotational position of the motor mover 62. 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 read head 981, and the other end of the sensor harness 983 is adapted to pass through the lead-out hole 631 and be led 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 read head 981 to the outside of the motor housing 63 via the sensor harness 983.

[0078] In some embodiments of this application, the sensor read head 981 may be connected and fixed to the motor housing 63.

[0079] In some embodiments of this application, the motor housing 63 has a housing hole 131 for the lead screw 2 to extend in the direction of the wheel, the displacement sensor 98 is located on the side of the motor mover 62 away from the housing hole 131, the motor part 6, the sensor magnetic ring 982 and the sensor reading head 981 are arranged above the motor part 6, and the sensor magnetic ring 982 is coaxially fixedly connected to the upper end face of the motor mover 9 with the first magnetic shielding plate 991.

[0080] In some embodiments of this application, the displacement sensor 98 is located on the side of the motor mover 62 facing the housing hole 131. The motor part 6, the sensor magnetic ring 982 and the sensor reading head 981 are disposed below the motor part 6. The sensor magnetic ring 982 is coaxially and fixedly connected to the lower end face of the motor mover 9 with the first magnetic shielding plate 991.

[0081] In some embodiments of this application, referring to Figures 3-4 and Figure 11, the actuator 10 further includes a stator positioning ring. 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 and the stator positioning ring 7 are located between the first positioning surface 81 and the second positioning surface 82. One axial end of the stator positioning ring 7 abuts against the first positioning surface 81, and the other axial end of the stator positioning ring 7 abuts against the motor stator 61. The axial end of the motor stator 61 away from the magnetic shielding plate 99 abuts against the second positioning surface 82. The displacement sensor 98 is located between the first positioning surface 81 and the magnetic shielding plate 99.

[0082] 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 3-4 and 7, both the motor stator 61 and the stator positioning ring 7 are fitted onto the stator mating surface 83. The sum of the axial length of the motor stator 61 and the axial length of the stator positioning ring 7 is equal to the distance between the first positioning surface 81 and the second positioning surface 82, that is, the sum of the axial length of the motor stator 61 and the axial length of the stator positioning ring 7 is equal to the axial length of the stator mating surface 83.

[0083] 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.

[0084] In the examples of Figures 2 and 7, the first positioning surface 81 is located above the second positioning surface 82, so that the stator positioning ring 7 is located above the motor stator 61. In some embodiments not shown in the figures, the first positioning surface 81 is located below the second positioning surface 82, so that the stator positioning ring 7 is located below the motor stator 61.

[0085] 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.

[0086] In some embodiments of this application, referring to Figures 3-4, the actuator 10 further includes a lead screw 2, a nut 3, and a first bearing 91. A motor mover 62 is mounted on the nut 3. The motor housing 63 includes a first bearing mounting seat 123, and the first bearing 91 is mounted on the first bearing mounting seat 123. One end of the nut 3 is rotatably supported on the motor housing 63 via the first bearing 91. The nut 3 is screwed to the lead screw 2, and when the nut 3 rotates, it drives the lead screw 2 to move linearly. The motor mover 62 can rotate synchronously with the nut 3. The displacement sensor 98 can obtain the rotational position of the nut 3 by detecting the rotational position of the motor mover 62. 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 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. Detecting the actual position by the displacement sensor 98 avoids the accumulation of displacement errors, thereby improving the accuracy and sustainability of the system. The displacement sensor 98 is not directly connected to the lead screw 2, which makes the structure simple and practical. It does not affect the structural layout of the motor structure 60. The displacement sensor 98 occupies little space and is easy to maintain.

[0087] The displacement sensor 98 is located on the axial side of the motor mover 62 facing the first bearing mounting base 123; or the displacement sensor 98 is located on the axial side of the motor mover 62 away from the first bearing mounting base 123.

[0088] In some embodiments of this application, 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. The stepped structure 631 is formed on the first bearing mounting base 123, thereby making full use of the internal structure of the motor housing 63.

[0089] In some embodiments of this application, referring to Figures 3-4, 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 component. The motor stator 61 is used to excite the motor mover 62 to rotate, thereby driving the nut 3 to rotate.

[0090] 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.

[0091] When the nut 3 and the motor mover 62 rotate, the sensor magnetic ring 982 rotates synchronously, and the magnetic field generated by the sensor magnetic ring 982 also rotates. The sensor read head 981 detects the change in the magnetic field and determines the change in the position of the sensor magnetic ring 982, that is, the change in the position of the nut 3. Then, the signal is transmitted to the control module through the signal processing circuit, and the position of the lead screw 2 is adjusted by the motor part 6 to adjust the vehicle height, thereby achieving the vibration reduction effect.

[0092] Referring to Figures 3-4 and 11, the magnetic shielding plate 99 has a magnetic shielding center hole 993 for the nut 3 to pass through. When the magnetic shielding plate 99 includes a first magnetic shielding plate 991 and a second magnetic shielding plate 992, and the second magnetic shielding plate 992 is sleeved on the outer periphery of the first magnetic shielding plate 991, the magnetic shielding center hole 993 is formed on the first magnetic shielding plate 991.

[0093] In some embodiments of this application, referring to Figures 3-4, the actuator 10 further includes a second bearing 92, and the motor housing 63 further includes a second bearing mounting base 133. The other end of the nut 3 is rotatably supported on the motor housing 63 via the second bearing 92. The first bearing 91 and the second bearing 92 support the rotating nut 3, thereby reducing frictional losses 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. The motor housing 63 includes a second bearing mounting base 133, and the second bearing 92 is mounted on the second bearing mounting base 133.

[0094] In some embodiments of this application, as shown in Figures 3-4, 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.

[0095] In some embodiments of this application, the first bearing 91 and the second bearing 92 may both be deep groove ball bearings.

[0096] This application provides an active control actuator 10 with a displacement sensor 98 for actively controlling 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 the motor unit 6 is 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.

[0097] In some embodiments of this application, referring to Figures 1-9, the motor housing 63 may include a second housing 12 and a third housing 13. The second housing 12 has a motor mounting space 120 inside, which is used to mount the displacement sensor 98, the motor stator 61, and the motor mover 62. The third housing 13 covers the end of the second housing 12 that is opposite to the first housing 11. The third housing 13 and the second housing 12 can be connected and fixed by connectors such as bolts or rivets.

[0098] In some embodiments of this application, as shown in Figures 3-4 and 7, the first positioning surface 81 and the stator mating surface 83 are both formed on the second housing 12, and the second positioning surface 82 is formed on the third housing 13.

[0099] In some embodiments of this application, referring to Figures 1-8, the actuator 10 according to an embodiment of this application may include a first housing 11, the interior of which has a travel space 113 for linear movement of the lead screw 2. A second housing 12 is connected to the first housing 11, and a motor mounting space 120 communicates with the travel space 113.

[0100] Referring to FIG7, the interior of the third housing 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.

[0101] In some embodiments of this application, the first housing 11 and the second housing 12 are an integral structure.

[0102] In some other embodiments of this application, the first housing 11 and the second housing 12 are separate structures. The first housing 11 and the second housing 12 can be connected and fixed by connectors such as bolts and rivets. Designing the first housing 11 and the second housing 12 as separate structures facilitates the assembly and disassembly of the components inside the first housing 11 and the second housing 12.

[0103] In some embodiments of this application, the second housing 12 has a second through hole 124 for the lead screw 2 to pass through at one end near the first housing 11. The second housing 12 has a cylindrical structure and a closed end face 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 first housing body 111, so as to connect the motor mounting space 120 and the stroke space 113, so that the lead screw 2 can pass smoothly.

[0104] In some embodiments of this application, referring to Figures 3-4 and 7-9, the second housing 12 includes a second housing body 121 and a second housing end plate 122, the second housing body 121 and the second housing end plate 122 are connected, the third housing 13 is connected to the second housing body 121, the first housing 11 is connected to the second housing end plate 122, the second through hole 124 is opened in the second housing end plate 122, 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.

[0105] In some embodiments of this application, referring to Figures 3-4, 7, and 9, the first housing 11 includes a first housing body 111 and a first housing protrusion 112, which are connected. A travel space 113 is formed within the first housing body 111. The first housing protrusion 112 protrudes radially outward from the first housing body 111 and is connected to the second housing end plate 122. The upper end of the first housing body 111 is adapted to connect to the vehicle body, and the lower end of the first housing body 111 has an opening structure for connecting the travel space 113 to the second housing 12, allowing the lead screw 2 to pass through.

[0106] Referring to Figures 7 and 8, the first housing protrusion 112 is provided with a first mounting hole 1121, and the second housing end plate 122 is provided with a second upper mounting hole 1221. The first mounting hole 1121 and the second upper mounting hole 1221 are at least partially connected. Threaded fasteners pass through the first mounting hole 1121 and the second upper mounting hole 1221 and are tightened to achieve the connection and fixation between the second housing 12 and the first housing 11.

[0107] In some embodiments of this application, one of the first mounting hole 1121 and the second upper mounting hole 1221 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.

[0108] In some embodiments of this application, the first mounting hole 1121 and the second upper mounting hole 1221 are both open holes, as shown in FIG8. After the bolt passes through the two open holes, it is tightened with the fastening nut.

[0109] 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 and the number of second upper mounting holes 1221 are the same, and their positions correspond one-to-one. When there are multiple first mounting holes 1121, as shown in Figures 5 and 7-8, 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 second upper mounting holes 1221 and fastening them.

[0110] Referring to Figures 3-4, 7 and 9, the lower end of the second housing body 121 is provided with a second lower mounting hole 1211, and the third housing 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 12 and the third housing 13.

[0111] 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.

[0112] 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.

[0113] 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.

[0114] In some embodiments of this application, referring to Figures 3 and 7-8, a first bearing mounting base 123 is disposed on a second housing end plate 122. 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.

[0115] In some embodiments of this application, referring to Figures 3-4, 7, and 9, a second bearing mounting base 133 is disposed on a third housing 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.

[0116] In some embodiments of this application, referring to Figures 1-3 and 5-7, a stud structure 93 is provided on the outside of the first housing 11 for connection with the vehicle body. When connecting the actuator 10 to the vehicle body, this can be achieved through the stud structure 93 on the first 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. The number of stud structures 93 can be one or more.

[0117] Referring to Figures 1-7, the first 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.

[0118] After the first housing 11 and the motor housing 63 are connected and fixed, they form the actuator housing. As shown in Figures 3-4, 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.

[0119] 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 3. 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.

[0120] Referring to Figures 1-4, 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.

[0121] 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.

[0122] In some embodiments of this application, referring to Figures 1-4 and 7, 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.

[0123] 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 length (i.e., the up-down direction as shown in Figure 3), the guide rod 41 maintains a good fit with the guide groove 21, 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, minimizing its space occupation within the actuator housing. The high integration of the guide rod 41 with the lead screw 2 and the small space occupied by the guide rod 41 contribute to the compact structure of the actuator 10.

[0124] 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.

[0125] 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.

[0126] 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.

[0127] 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.

[0128] In some embodiments of this application, the length of the guide rod 41 is less than the travel of the lead screw 2, or the length of the guide rod 41 is equal to the travel of the lead screw 2. 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.

[0129] In some embodiments of this application, referring to FIG3, 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.

[0130] In some embodiments of this application, referring to Figures 3 and 7, 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 installed on the inner peripheral wall of the guide groove 21, and the inner peripheral surface of the sliding bearing 42 is in guide engagement 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 the guide rod 41 from directly contacting the guide groove 21 and causing wear. The sliding bearing 42 plays a role in sliding guidance and reducing sliding friction resistance, which is beneficial to improving the running stability of the lead screw 2.

[0131] 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 fit, which ensures that the sliding bearing 42 can be firmly installed in the guide groove 21; the inner peripheral surface of the sliding bearing 42 and the outer peripheral wall of the guide rod 41 are clearance fit, which ensures that the lead screw 2 can move smoothly.

[0132] In some embodiments of this application, referring to Figures 3-4, 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.

[0133] In the examples of Figures 3 and 4, 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.

[0134] In some embodiments of this application, the shape of the ventilation channel 411 may also be arc-shaped, three-sectioned, corrugated, etc.

[0135] In some embodiments of this application, referring to Figures 3-4, 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. When the lead screw 2 moves linearly, the guide ring 43 slides along the inner circumferential surface 115 of the housing, providing sliding guidance. The guide ring 43 can guide the linear movement of the lead screw 2, effectively preventing the lead screw 2 from deviating from its axis during movement, thereby reducing the risk of lead screw 2 wear, abnormal noise, and failure, and further enhancing the operational stability of the lead screw 2 during axial reciprocating motion.

[0136] 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.

[0137] In some embodiments of this application, referring to Figures 1-3, the stud structure 93 provided on the first 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.

[0138] Referring to Figure 3, the wheel connection structure 94 is a lower fork arm. The lower fork arm and the lead screw 2 are connected and fixed by a fastener 97. The lower fork arm connects the lead screw 2 to the wheel end. The lead screw 2 drives the lower fork arm to move linearly, thereby controlling the position of the wheel end. In some embodiments of this application, the fastener 97 can be a screw. The lower end of the lead screw 2 has a threaded hole. The screw passes through the lower fork arm and is tightened into the threaded hole to achieve a tight connection between the lower fork arm and the lead screw 2.

[0139] 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.

[0140] In some embodiments of this application, referring to Figures 1-3, 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 1-3, the elastic support 95 can be a coil spring.

[0141] In some embodiments of this application, referring to Figures 1-3, 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.

[0142] In some embodiments of this application, 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 to move linearly, thereby realizing the conversion between rotational motion and linear motion. The guide structure 4 strictly restricts the actuation 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 driving comfort requirements of the vehicle 1000.

[0143] Referring to FIG14, the suspension assembly 100 according to the second aspect of the present application includes the actuator 10 of the above embodiment.

[0144] According to the embodiment of this application, the suspension assembly 100 has an actuator 10 that uses a displacement sensor 98, which includes a sensor magnetic ring 982 and a sensor read head 981, which facilitates the installation of the displacement sensor 98.

[0145] Referring to FIG15, the vehicle 1000 according to a third aspect embodiment of the present application includes the suspension assembly 100 of the above embodiment.

[0146] According to an embodiment of this application, the vehicle 1000 has a suspension assembly 100 including an actuator 10. By selecting a displacement sensor 98 including a sensor magnetic ring 982 and a sensor read head 981, the installation of the displacement sensor 98 is facilitated.

[0147] 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.

[0148] 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.

[0149] 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.

[0150] 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, The actuator (10) comprises: a motor portion (6) comprising a motor rotor (62) adapted to rotate relative to a motor stator (61); and a displacement sensor (98) comprising a sensor magnet ring (982) fixed relative to the motor rotor (62) and a sensor read head (981) fixed relative to the motor stator (61).

2. The actuator (10) according to claim 1, wherein The sensor magnet ring (982) is coaxially arranged with the motor stator (61).

3. The actuator (10) according to claim 1 or 2, wherein The actuator (10) further comprises a magnetic shield plate (99) arranged between the motor portion (6) and the displacement sensor (98), the sensor magnet ring (982) being located on a side of the magnetic shield plate (99) facing away from the motor portion (6).

4. The actuator (10) according to claim 3, wherein The magnetic shield plate (99) comprises a first magnetic shield plate (991) fixedly connected with the motor rotor (62), the first magnetic shield plate (991) being spaced apart from the sensor read head (981), the sensor magnet ring (982) being located on a side of the first magnetic shield plate (991) facing away from the motor rotor (62).

5. The actuator (10) according to claim 4, wherein The sensor magnet ring (982) is fixedly connected with the motor rotor (62), or the sensor magnet ring (982) is fixedly connected with the first magnetic shield plate (991), or the sensor magnet ring (982) is fixedly connected with both the motor rotor (62) and the first magnetic shield plate (991).

6. The actuator (10) according to claim 4 or 5, wherein The magnetic shield plate (99) comprises a second magnetic shield plate (992) mounted on the motor stator (61), the second magnetic shield plate (992) being adapted to be spaced apart from the first magnetic shield plate (991) and the motor rotor (62).

7. The actuator (10) according to claim 6, wherein The sensor read head (981) is adapted to be fixedly connected with the motor stator (61), or the sensor read head (981) is adapted to be fixedly connected with the second magnetic shield plate (992), or the sensor read head (981) is adapted to be fixedly connected with both the motor stator (61) and the second magnetic shield plate (992).

8. The actuator (10) according to claim 6 or 7, wherein The second magnetic shield plate (992) is located radially outward of the first magnetic shield plate (991).

9. The actuator (10) according to any one of claims 3-8, wherein, The actuator (10) further comprises a nut (3) provided with a first circumferential protrusion (33) protruding radially outward of the nut (3), the motor rotor (62) being mounted on the nut (3) and located on an axial side of the first circumferential protrusion (33), the magnetic shield plate (99) being located radially outward of the first circumferential protrusion (33).

10. The actuator (10) according to any one of claims 1-9, wherein, The sensor read head (981) is located radially outward of the sensor magnet ring (982).

11. The actuator (10) according to any one of claims 1-10, wherein, The actuator (10) further comprises a motor housing (63) having a motor mounting space (120) inside, the motor portion (6), the sensor magnetic ring (982) and the sensor read head (981) are arranged in the motor mounting space (120), the motor housing (63) is provided with a lead-out hole (631), the displacement sensor (98) further comprises a sensor wire harness (983), one end of the sensor wire harness (983) is connected with the sensor read head (981), the other end of the sensor wire harness (983) is adapted to be led out to the outside of the motor housing (63) through the lead-out hole (631).

12. The actuator (10) according to claim 11, wherein The motor housing (63) has a housing hole (131) for the lead-out of the lead screw (2) to the wheel direction, the displacement sensor (98) is located on the side of the motor rotor (62) away from the housing hole (131); or, the displacement sensor (98) is located on the side of the motor rotor (62) facing the housing hole (131).

13. The actuator (10) according to claim 11 or 12, wherein The actuator (10) further comprises a stator positioning ring (7) and a magnetic shield plate (99), the inside of the motor housing (63) has a first positioning surface (81) and a second positioning surface (82), the motor stator (61) and the stator positioning ring (7) are located between the first positioning surface (81) and the second positioning surface (82), the axial one end of the stator positioning ring (7) abuts against the first positioning surface (81), the axial other end of the stator positioning ring (7) abuts against the motor stator (61), the axial one end of the motor stator (61) away from the magnetic shield plate (99) abuts against the second positioning surface (82), the displacement sensor (98) is located between the first positioning surface (81) and the magnetic shield plate (99).

14. The actuator (10) according to any one of claims 11-13, wherein, The actuator (10) further comprises a lead screw (2), a nut (3) and a first bearing (91), the motor rotor (62) is mounted to the nut (3), the motor housing (63) comprises a first bearing mounting seat (123), the first bearing (91) is mounted to the first bearing mounting seat (123), one end of the nut (3) is rotatably supported to the motor housing (63) through the first bearing (91), the nut (3) is screw-coupled with the lead screw (2), the nut (3) rotates to drive the lead screw (2) to linearly move; The displacement sensor (98) is located on the axial side of the motor rotor (62) facing the first bearing mounting seat (123); or the displacement sensor (98) is located on the axial side of the motor rotor (62) away from the first bearing mounting seat (123).

15. The actuator (10) according to claim 14, wherein The actuator (10) further comprises a second bearing (92), the motor housing (63) further comprises a second bearing mount (133), the other end of the nut (3) is rotatably supported on the motor housing (63) by the second bearing (92), and the second bearing (92) is spaced apart from the first bearing (91) in the axial direction of the nut (3).

16. A suspension assembly (100), wherein An actuator (10) according to any one of claims 1-15.

17. A vehicle (1000), wherein A suspension assembly (100) according to claim 16. A suspension assembly (100) according to claim 16.

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