Actuator, suspension assembly and vehicle

Abstract

The invention discloses an actuator, a suspension assembly and a vehicle, and relates to the technical field of vehicles. The actuator comprises a motor part and a displacement sensor, the motor part comprises a motor rotor and a motor stator, and the motor rotor is suitable for rotating relative to the motor stator; the displacement sensor comprises a sensor magnetic ring and a sensor read head, the sensor magnetic ring and the motor rotor are relatively fixed, and the sensor read head and the motor stator are relatively fixed. According to the actuator provided by the invention, the displacement sensor comprising the sensor magnetic ring and the sensor read head is selected, so that the installation of the displacement sensor is facilitated.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and more specifically, to an actuator, a suspension assembly having the actuator, and a vehicle having the suspension assembly. Background Technology

[0002] In related technologies, actuators include a motor structure and a displacement sensor. The motor drives a lead screw to move linearly to adjust the distance between the vehicle body and the wheels, while the displacement sensor detects the linear displacement of the lead screw. However, the displacement sensor in existing actuators is inconvenient to install and requires multiple positioning methods. Therefore, there is room for improvement. Summary of the Invention

[0003] The present invention aims to at least partially solve one of the aforementioned technical problems in the prior art. To this end, the present invention proposes an actuator that facilitates the installation of a displacement sensor.

[0004] The present invention also proposes a suspension assembly having the above-mentioned actuator.

[0005] The present invention also proposes a vehicle having the above-described suspension assembly.

[0006] An actuator according to an embodiment of the present invention includes: a motor part and a displacement sensor, the motor part including a motor mover and a motor stator, the motor mover being adapted to rotate relative to the motor stator; the displacement sensor including 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.

[0007] The actuator according to an embodiment of the present invention facilitates the installation of the displacement sensor by selecting a displacement sensor including a sensor magnetic ring and a sensor read head.

[0008] According to some embodiments of the present invention, the sensor magnetic ring is coaxially arranged with the motor stator.

[0009] According to some embodiments of the present invention, the actuator further includes a magnetic shielding plate disposed between the motor part and the displacement sensor, wherein the sensor magnetic ring is located on the side of the magnetic shielding plate opposite to the motor part.

[0010] According to some embodiments of the present invention, the magnetic shielding plate includes a first magnetic shielding plate, the first magnetic shielding plate 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.

[0011] According to some embodiments of the present invention, the sensor magnetic ring is connected and fixed to the motor actuator and / or the first magnetic shielding plate.

[0012] According to some embodiments of the present invention, the magnetic shielding plate includes a second magnetic shielding plate, the second magnetic shielding plate is mounted on the motor stator, and the second magnetic shielding plate is adapted to be spaced apart from the first magnetic shielding plate and the motor rotor.

[0013] According to some embodiments of the present invention, the sensor reading head is adapted to be connected and fixed to the motor stator and / or the second magnetic shielding plate.

[0014] According to some embodiments of the present invention, the second magnetic shielding plate is located radially outside the first magnetic shielding plate.

[0015] According to some embodiments of the present invention, the actuator further includes a 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.

[0016] According to some embodiments of the present invention, the sensor read head is located radially outside the sensor magnetic ring.

[0017] According to some embodiments of the present invention, 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.

[0018] According to some embodiments of the present invention, 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 mover opposite to the housing hole; or, the displacement sensor is located on the side of the motor mover facing the housing hole.

[0019] According to some embodiments of the present invention, 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.

[0020] According to some embodiments of the present invention, 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.

[0021] According to some embodiments of the present invention, the actuator further includes a second bearing, the motor housing further includes a second bearing mounting seat, 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.

[0022] According to a second aspect of the present invention, a suspension assembly includes the actuator described above.

[0023] According to an embodiment of the present invention, the actuator of the suspension assembly uses a displacement sensor comprising a sensor magnetic ring and a sensor reading head, which facilitates the installation of the displacement sensor.

[0024] A vehicle according to a third aspect of the present invention includes the suspension assembly described above.

[0025] According to an embodiment of the present invention, the suspension assembly of the vehicle includes an actuator, and the installation of the displacement sensor is facilitated by selecting a displacement sensor including a sensor magnetic ring and a sensor read head.

[0026] Additional aspects and advantages of the invention 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 the invention. Attached Figure Description

[0027] Figure 1 This is a perspective view of an actuator according to an embodiment of the present invention;

[0028] Figure 2 This is a front view of the actuator according to an embodiment of the present invention;

[0029] Figure 3 yes Figure 2 Sectional view of AA;

[0030] Figure 4 yes Figure 3 A magnified view of a portion of point B in the middle;

[0031] Figure 5It is a three-dimensional schematic diagram of the first housing, the motor housing, the guide structure and the stud structure;

[0032] Figure 6 This is a front view of the first housing, the motor housing, and the stud structure;

[0033] Figure 7 yes Figure 6 Sectional view of DD;

[0034] Figure 8 yes Figure 7 A magnified view of a portion of point E in the middle;

[0035] Figure 9 yes Figure 7 A magnified view of a portion of point F in the middle;

[0036] Figure 10 This is a 3D schematic diagram of a displacement sensor.

[0037] Figure 11 This is a 3D schematic diagram of a magnetic shielding plate;

[0038] Figure 12 This is a schematic diagram showing the displacement sensor positioned below the motor section;

[0039] Figure 13 yes Figure 12 A magnified view of a portion of point G in the middle;

[0040] Figure 14 This is a schematic diagram of a suspension assembly according to an embodiment of the present invention;

[0041] Figure 15 This is a schematic diagram of a vehicle according to an embodiment of the present invention.

[0042] Figure label:

[0043] 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

[0044] Embodiments of the present invention are described in detail below, examples of which are illustrated 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 the present invention, and should not be construed as limiting the present invention.

[0045] In the description of this invention, 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 invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0046] The following is combined with Figures 1-15The present invention describes in detail an actuator 10, a suspension assembly 100 having the actuator 10, and a vehicle 1000 having the suspension assembly 100 according to embodiments of the present invention.

[0047] Reference Figures 1-3 , Figure 10 As shown, the actuator 10 according to an embodiment of the present invention may include: a motor unit 6 and a displacement sensor 98.

[0048] 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. Specifically, 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.

[0049] It is understandable that "the sensor magnetic ring 982 is relatively fixed to the motor rotor 62" means that the sensor magnetic ring 982 and the motor rotor 62 can move and stop synchronously. For example, when the motor rotor 62 rotates, the sensor magnetic ring 982 rotates synchronously with the motor rotor 62; when the motor rotor 62 stops rotating, the sensor magnetic ring 982 stops rotating synchronously with the motor rotor 62. In this way, the displacement sensor 98 can accurately detect the rotational displacement of the motor rotor 62. The sensor magnetic ring 982 can be installed on the motor rotor 62, or it can be installed on other components that are fixed in a relative position to the motor rotor 62.

[0050] Similarly, "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 it can be installed on other components that are fixed in position relative to the motor stator 61.

[0051] Specifically, 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.

[0052] 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 the present invention, 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.

[0053] In some embodiments of the present invention, reference is made to... Figures 3-4 As shown, 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, sensor magnetic ring 982, and motor stator 61 are all coaxially arranged. In other words, the motor rotor 62, sensor magnetic ring 982, and motor stator 61 are all rotating bodies, and their axes coincide. As a result, when the motor rotor 62 and 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.

[0054] In some embodiments of the present invention, the actuator 10 further includes a magnetic shielding plate 99, which is disposed between the motor section 6 and the displacement sensor 98, with the sensor magnetic ring 982 located on the side of the magnetic shielding plate 99 facing away from the motor section 6. (See also...) Figures 3-4 As shown, the magnetic shielding plate 99 is located on the upper side of the motor section 6, and the sensor magnetic ring 982 is located on the upper side of the magnetic shielding plate 99. In some embodiments, refer to Figures 12-13 As shown, the magnetic shielding plate 99 can be located on the lower side of the motor section 6, and the sensor magnetic ring 982 is located on the lower side of the magnetic shielding plate 99. That is, the positions of the magnetic shielding plate 99 and the displacement sensor 98 can be adjusted by... Figures 3-4 The upper part of the central motor section 6 is adjusted to Figures 12-13 Below the central motor section 6.

[0055] 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.

[0056] Alternatively, the magnetic shielding plate 99 can be an aluminum plate, which is lighter and less expensive.

[0057] In some embodiments of the present invention, reference is made to... Figures 3-4 , Figure 11As shown, the magnetic shielding plate 99 includes a first magnetic shielding plate 991, which is connected and fixed 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 it rotates 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.

[0058] In some embodiments of the present invention, the sensor magnetic ring 982 is connected and fixed to the motor rotor 62 and / or the first magnetic shielding plate 991. Figures 3-4 , Figures 10-11 In the illustrated embodiment, 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 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 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.

[0059] In some embodiments, 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, after the fastener passes through the magnetic ring fixing hole 9821 and the first magnetic isolation fixing hole, it 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.

[0060] In some other embodiments, the sensor magnetic ring 982 is connected and fixed to the motor mover 62; or, a portion of the sensor magnetic ring 982 is connected and fixed to the motor mover 62, and another portion is connected and fixed to the first magnetic shielding plate 991.

[0061] In some embodiments of the present invention, reference is made to... Figures 3-4 , Figure 11 As shown, 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 mover 62. Of course, the second magnetic shielding plate 992 can also be mounted on other components that are fixedly connected to the motor stator 61.

[0062] In some embodiments of the present invention, the sensor read head 981 is adapted to be connected and fixed to the motor stator 61 and / or the second magnetic shielding plate 992. Figures 3-4 , Figures 10-11 In the example shown, the sensor read head 981 is connected and fixed to the second magnetic shielding plate 992. Specifically, 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 achieving the connection and fixation between the sensor read head 981 and the second magnetic shielding plate 992. In some embodiments not shown in the figure, the sensor read head 981 can be connected and fixed to the motor stator 61.

[0063] It should be noted that the terms "fastener", "first fastener", "second fastener" and "third fastener" used in this invention refer to components used to connect multiple parts, such as screws, rivets, bolts, etc.

[0064] In some embodiments of the present invention, reference is made to... Figures 3-4 , Figure 11 As shown, the second magnetic shielding plate 992 is located radially outside the first magnetic shielding plate 991, thereby making reasonable use of the radial space and making the structure compact.

[0065] In some embodiments of the present invention, reference is made to... Figures 3-4 As shown, the actuator 10 also includes a nut 3, which has a first circumferential protrusion 33. The first circumferential protrusion 33 protrudes outward along the radial direction of the nut 3. The motor rotor 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 rotor 62 to ensure that the relative axial position of the motor rotor 62 and the nut 3 is accurate. The magnetic shielding plate 99 is located on the radial outer side of the first circumferential protrusion 33. Thus, the magnetic shielding plate 99 can make full use of the radial outer space of the first circumferential protrusion 33, making the internal structure of the actuator 10 more compact.

[0066] In some embodiments of the present invention, reference is made to... Figures 3-4 As shown, 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.

[0067] In some embodiments of the present invention, reference is made to... Figures 3-4As shown, 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. 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.

[0068] 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 connecting parts. 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 of the present invention on the whole vehicle.

[0069] Optionally, the first circumferential protrusion 33 and the nut 3 can be an integral structure, with the first circumferential protrusion 33 and the nut 3 being integrally formed; or alternatively, the first circumferential protrusion 33 and the nut 3 can also be a separate structure. 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 along the radial direction of the nut 3 from the outer circumferential surface of the nut 3.

[0070] Optionally, the second circumferential protrusion 34 and the nut 3 can be an integral structure, with the second circumferential protrusion 34 and the nut 3 being integrally formed; or alternatively, the second circumferential protrusion 34 and the nut 3 can also be a separate structure. 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 along the radial direction of the nut 3 from the outer circumferential surface of the nut 3.

[0071] 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.

[0072] In some embodiments of the present invention, reference is made to... Figures 3-4 , Figure 10 As shown, the sensor read head 981 is located radially outside the sensor magnetic ring 982, thus making reasonable 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, allowing 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 helps to fully utilize the radial space of the actuator 10.

[0073] In some embodiments of the present invention, reference is made to... Figures 1-8 As shown, the actuator 10 also 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 technology 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.

[0074] In some embodiments not shown in the figures, the sensor read head 981 may be connected and fixed to the motor housing 63.

[0075] In some embodiments of the present invention, the motor housing 63 has a housing hole 131 for the lead screw 2 to extend in the direction of the wheel, and the displacement sensor 98 is located on the side of the motor mover 62 away from the housing hole 131. Specifically, 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.

[0076] Alternatively, in some embodiments of the present invention, the displacement sensor 98 is located on the side of the motor mover 62 facing the housing hole 131. Specifically, the motor part 6, the sensor magnetic ring 982 and the sensor reading head 981 are disposed below the motor part 6, and 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.

[0077] In some embodiments of the present invention, reference is made to... Figures 3-4 , Figure 11As shown, the actuator 10 also includes a stator positioning ring. The interior of the motor housing 63 has a first positioning surface 81 and a second positioning surface 82, which are spaced apart. 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.

[0078] 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. (Refer to...) Figures 3-4 , Figure 7 As shown, the motor stator 61 and the stator positioning ring 7 are both 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.

[0079] Optionally, the motor stator 61 is press-fitted into the stator mating surface 83 inside the motor housing 63 by an interference fit.

[0080] exist Figure 2 , Figure 7 In the example, 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 figure, 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.

[0081] The first positioning surface 81 and the second positioning surface 82 are arranged opposite to each other. Optionally, the first positioning surface 81 and the second positioning surface 82 are parallel to each other.

[0082] In some embodiments of the present invention, reference is made to... Figures 3-4As shown, the actuator 10 also 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 base 123, and the first bearing 91 is mounted on the first bearing mounting base 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 through 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.

[0083] 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.

[0084] Optionally, 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.

[0085] In some embodiments of the present invention, reference is made to... Figures 3-4 As shown, 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.

[0086] Specifically, the motor stator 61 provides the required excitation magnetic field, and the magnetic element 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 element is mounted.

[0087] 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.

[0088] Reference Figures 3-4 and Figure 11 As shown, the magnetic shielding plate 99 has a magnetic shielding center hole 993, which is used 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.

[0089] In some embodiments of the present invention, reference is made to... Figures 3-4 As shown, the actuator 10 also includes a second bearing 92, and the motor housing 63 also 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, 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.

[0090] Alternatively, in some embodiments, such as Figures 3-4 As shown, both the first bearing 91 and the second bearing 92 can be angular contact ball bearings, and the first bearing 91 and the second bearing 92 are 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.

[0091] Alternatively, in some other embodiments, both the first bearing 91 and the second bearing 92 may be deep groove ball bearings.

[0092] This invention provides an active control actuator 10 with a displacement sensor 98, used to actively control 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.

[0093] In some embodiments of the present invention, reference is made to... Figures 1-9As shown, 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 and rivets.

[0094] In some embodiments of the present invention, reference is made to... Figures 3-4 , Figure 7 As shown, 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.

[0095] In some embodiments of the present invention, reference is made to... Figures 1-8 As shown, the actuator 10 according to an embodiment of the present invention may include a first housing 11, the interior of which has a stroke 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 is connected to the stroke space 113.

[0096] Reference Figure 7 As shown, the interior of the third housing 13 has an end cover space 132, which is connected to the motor mounting space 120. The travel space 113, the motor mounting space 120 and the end cover space 132 together form the mounting cavity 14.

[0097] In some embodiments of the present invention, the first housing 11 and the second housing 12 are integral structures.

[0098] Alternatively, in some embodiments of the present invention, 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, rivets, etc. 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.

[0099] In some embodiments of the present invention, 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.

[0100] In some embodiments of the present invention, reference is made to... Figures 3-4 , Figures 7-9As shown, 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 together. 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 and is connected to the motor mounting space 120. The second through hole 124 is used for the lead screw 2 to pass through.

[0101] In some embodiments of the present invention, reference is made to... Figures 3-4 , Figure 7 and Figure 9 As shown, 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 outward along the radial direction of 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 be connected 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.

[0102] Reference Figures 7-8 As shown, 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 fastened to achieve the connection and fixation between the second housing 12 and the first housing 11.

[0103] Optionally, 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.

[0104] Alternatively, both the first mounting hole 1121 and the second upper mounting hole 1221 can be light holes, such as... Figure 8 As shown, the bolt is passed through the two holes and then tightened with the fastening nut.

[0105] Optionally, there may be one or more first mounting holes 1121, and the number of first mounting holes 1121 and the positions of second upper mounting holes 1221 are the same and correspond one-to-one. When there are multiple first mounting holes 1121, refer to... Figure 5 , Figures 7-8 As shown, 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 threaded fasteners to pass through the first mounting holes 1121 and the second upper mounting holes 1221 and fasten them.

[0106] Reference Figures 3-4 , Figure 7 and Figure 9 As shown, 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.

[0107] Optionally, 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.

[0108] Alternatively, both the third mounting hole 135 and the second lower mounting hole 1211 are open holes, and a bolt is passed through the two open holes and tightened with a fastening nut.

[0109] Optionally, there may be one or more third mounting holes 135, and the number of third mounting holes 135 is the same as that of the 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.

[0110] In some embodiments of the present invention, reference is made to... Figure 3 , Figures 7-8 As shown, a first bearing mounting base 123 is disposed on the 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.

[0111] In some embodiments of the present invention, reference is made to... Figures 3-4 , Figure 7 and Figure 9As shown, the second bearing mounting base 133 is disposed on the 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 one 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 other axial end face of the second bearing 92.

[0112] In some embodiments of the present invention, reference is made to... Figures 1-3 , Figures 5-7 As shown, a stud structure 93 is provided on the outside of the first 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 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. Optionally, there can be one or more stud structures 93.

[0113] Reference Figures 1-7 As shown, 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.

[0114] After the first housing 11 and the motor housing 63 are connected and fixed, they form the actuator housing, as shown in the reference. Figures 3-4 As shown, 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.

[0115] Specifically, when nut 3 rotates, it drives lead screw 2 to rotate. Since nut 3 is mounted on 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. Figure 3 The screw 2 moves vertically. The guide structure 4 is used to limit and guide the screw 2. Under the guidance of the guide structure 4, the screw 2 can be effectively prevented from deviating from its axis during the movement, thereby reducing the risk of screw 2 wear, abnormal noise, failure and other problems, and further enhancing the stability of the screw 2 in the axial reciprocating motion.

[0116] Reference Figures 1-4 As shown, 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 and reduce the probability of damage to the guide structure 4, the lead screw 2 and the nut 3.

[0117] According to the embodiment of the present invention, the actuator 10 has a guide structure 4 between the lead screw 2 and the actuator housing, which can guide the linear motion of the lead screw 2, which is beneficial to enhance the stability of the lead screw 2 in the axial reciprocating motion process. The actuator has a reliable working principle, simple structure, high machinability, and convenient assembly and disassembly.

[0118] In some embodiments of the present invention, reference is made to... Figures 1-4 and Figure 7 As shown, 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 and the guide groove 21 to guide each other, the guide rod 41 can guide the linear movement of the lead screw 2. The working principle is simple and reliable.

[0119] Specifically, the length direction of the guide groove 21 is the same as the length direction of the lead screw 2, and the guide rod 41 is guided and engaged with the guide groove 21. Specifically, when the lead screw 2 moves along its own length direction (i.e., Figure 3 When moving (in the up-down direction as shown), the guide rod 41 and the guide groove 21 of the lead screw 2 always fit well, thus guiding the linear movement of the lead screw 2. Under the guidance of the guide rod 41, the lead screw 2 can be effectively prevented from deviating from its axis during movement, thereby reducing the risk of uneven wear, abnormal noise, and failure of the lead screw 2. The working principle of the guide rod 41 guiding the lead screw 2 is simple and reliable. In addition, the guide rod 41 extends at least partially into the guide groove 21 of the lead screw 2. The guide rod 41 does not occupy too much space inside the actuator housing. The guide rod 41 and the lead screw 2 have a high degree of integration, and the space occupied by the guide rod 41 is small, making the structure of the actuator 10 compact.

[0120] 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.

[0121] 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.

[0122] In some embodiments of the present invention, 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.

[0123] In some embodiments of the present invention, 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 does not interfere with the guide rod 41 within its travel distance.

[0124] In some embodiments of the present invention, 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. Thus, 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.

[0125] In some embodiments of the present invention, reference is made to... Figure 3 As shown, the actuator housing has an internal mounting cavity 14, with the nut 3 located within it. A mating cavity 5 is formed between the end of the guide rod 41 extending into the guide groove 21 and the bottom of the groove. A ventilation channel 411 is provided on the guide rod 41, connecting 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 within the mating cavity 5 experiences significant damping force due to frequent compression by the guide rod 41, hindering the movement of the guide rod 41 within the guide groove 21. The ventilation channel 411 on the guide rod 41 reduces the damping force generated by frequent compression of the gas within the mating cavity 5, thus minimizing resistance when the guide rod 41 moves within the guide groove 21.

[0126] In some embodiments of the present invention, reference is made to... Figure 3 , Figure 7 As shown, the guide structure 4 also includes a sliding bearing 42, which is disposed at the guide engagement point between the guide rod 41 and the guide groove 21. Specifically, 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.

[0127] In some embodiments of the present invention, 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; and / or, 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.

[0128] In some embodiments of the present invention, reference is made to... Figures 3-4 As shown, 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 the 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.

[0129] exist Figures 3-4 In the example, the ventilation channel 411 is in the shape 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.

[0130] In some embodiments not shown in the figure, the shape of the ventilation channel 411 can also be arc-shaped, three-section, corrugated, etc.

[0131] In some embodiments of the present invention, reference is made to... Figures 3-4 As shown, 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 in sliding engagement 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, playing a sliding guiding role. 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, failure, etc., and further enhancing the running stability of the lead screw 2 during axial reciprocating motion.

[0132] Optionally, 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.

[0133] In some embodiments of the present invention, reference is made to... Figures 1-3As shown, 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. The actuator housing is adapted to be connected to the vehicle body through the stud structure 93.

[0134] Reference Figure 3 As shown, the wheel connection structure 94 is a lower fork arm. The lower fork arm and the lead screw 2 are connected and fixed together 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 together, thereby controlling the position of the wheel end. Optionally, 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. Alternatively, the fastener 97 can be a bolt. The lower end of the lead screw 2 has a smooth hole. The screw passes through the smooth hole of the lower fork arm and the lead screw 2 and is tightened into the nut 3 to achieve a tight connection between the lower fork arm and the lead screw 2.

[0135] In some embodiments of the present invention, reference is made to... Figures 1-3 As shown, the actuator 10 also includes an elastic support 95, which is sleeved on the lead screw 2 and 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 support part of the vehicle body weight, reducing the active thrust required by the actuator 10. (Refer to...) Figures 1-3 As shown, the elastic support 95 can be a helical spring.

[0136] In some embodiments of the present invention, reference is made to... Figures 1-3 As shown, the actuator 10 also includes a dust cover 96, which is fitted over the lead screw 2 and 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 within which the housing hole 131 is located. 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.

[0137] In one specific embodiment, the principle of the active actuation of the entire actuator 10 is as follows: the stator 61 of the motor 6 drives the mover 62 to rotate, the 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, 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 driving comfort requirements of the vehicle 1000.

[0138] Reference Figure 14 As shown, the suspension assembly 100 according to a second aspect embodiment of the present invention includes the actuator 10 of the above embodiment.

[0139] According to an embodiment of the present invention, the suspension assembly 100 has an actuator 10 that uses a displacement sensor 98, which includes a sensor magnetic ring 982 and a sensor reading head 981, which facilitates the installation of the displacement sensor 98.

[0140] Reference Figure 15 As shown, a vehicle 1000 according to a third aspect embodiment of the present invention includes the suspension assembly 100 of the above embodiment.

[0141] According to an embodiment of the present invention, 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 reading head 981, the installation of the displacement sensor 98 is facilitated.

[0142] In the description of this invention, 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. They are only for the convenience of describing this invention 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. Therefore, they should not be construed as limitations on this invention.

[0143] In this invention, unless otherwise explicitly 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 of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0144] 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 the invention. 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.

[0145] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An actuator (10), characterized in that, include: A motor unit (6), comprising a motor mover (62) and a motor stator (61), wherein the motor mover (62) is adapted to rotate relative to the motor stator (61); and 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).

2. The actuator (10) according to claim 1, characterized in that, The sensor magnetic ring (982) is coaxially arranged with the motor stator (61).

3. The actuator (10) according to claim 1, characterized in that, The actuator (10) also includes a magnetic shielding plate (99), which is disposed between the motor unit (6) and the displacement sensor (98), and the sensor magnetic ring (982) is located on the side of the magnetic shielding plate (99) away from the motor unit (6).

4. The actuator (10) according to claim 3, characterized in that, The magnetic shielding plate (99) includes a first magnetic shielding plate (991), which is connected and fixed to the motor mover (62). The first magnetic shielding plate (991) is spaced apart from the sensor reading head (981), and the sensor magnetic ring (982) is located on the side of the first magnetic shielding plate (991) away from the motor mover (62).

5. The actuator (10) according to claim 4, characterized in that, The sensor magnetic ring (982) is connected and fixed to the motor mover (62) and / or the first magnetic shielding plate (991).

6. The actuator (10) according to claim 4, characterized in that, 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 mover (62).

7. The actuator (10) according to claim 6, characterized in that, The sensor read head (981) is adapted to be connected and fixed to the motor stator (61) and / or the second magnetic shielding plate (992).

8. The actuator (10) according to claim 6, characterized in that, The second magnetic shielding plate (992) is located radially outside the first magnetic shielding plate (991).

9. The actuator (10) according to claim 3, characterized in that, The actuator (10) further includes a nut (3), on which a first circumferential protrusion (33) is provided. The first circumferential protrusion (33) protrudes outward along the radial direction of the nut (3). The motor mover (62) is mounted on the nut (3) and located on one axial side of the first circumferential protrusion (33). The magnetic shielding plate (99) is located on the radial outer side of the first circumferential protrusion (33).

10. The actuator (10) according to claim 1, characterized in that, The sensor read head (981) is located radially outside the sensor magnetic ring (982).

11. The actuator (10) according to any one of claims 1-10, characterized in that, The actuator (10) further includes a motor housing (63), which has a motor mounting space (120) inside. The motor part (6), the sensor magnetic ring (982) and the sensor reading head (981) are disposed in the motor mounting space (120). The motor housing (63) is provided with a lead-out hole (631). The displacement sensor (98) further includes a sensor harness (983), one end of which is connected to the sensor reading head (981), and the other end of which is adapted to pass through the lead-out hole (631) to be led out to the outside of the motor housing (63).

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

13. The actuator (10) according to claim 11, characterized in that, The actuator (10) further includes a stator positioning ring (7) and a magnetic shielding plate (99). The motor housing (63) has a first positioning surface (81) and a second positioning surface (82) inside. 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).

14. The actuator (10) according to claim 11, characterized in that, The actuator (10) further includes a lead screw (2), a nut (3), and a first bearing (91). The motor mover (62) is mounted on the nut (3). The motor housing (63) includes a first bearing mounting seat (123). 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) through the first bearing (91). The nut (3) is screwed into the lead screw (2). When the nut (3) rotates, it can drive the lead screw (2) to move linearly. 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).

15. The actuator (10) according to claim 14, characterized in that, 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) by the second bearing (92). The second bearing (92) and the first bearing (91) are spaced apart axially from each other in the nut (3).

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

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

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