Suspension motor actuator, suspension assembly and vehicle

Abstract

The invention relates to a suspension motor actuator, a suspension assembly and a vehicle. The suspension motor actuator comprises a shell assembly and a suspension assembly, the rotor assembly is partially located in the shell assembly, and the rotor assembly can generate variable relative displacement relative to the shell assembly; the elastic supporting assembly comprises a first elastic piece, one end of the first elastic piece abuts against the shell assembly, and the other end of the first elastic piece abuts against the rotor assembly; the first elastic piece is a variable-rigidity elastic supporting assembly. According to the suspension motor actuator, the suspension assembly and the vehicle, on the premise that the effective stroke of the rotor of the suspension motor is guaranteed, the maximum radial size and the maximum axial size of the suspension motor actuator assembly can be controlled within a reasonable range.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronics, in particular to a levitation motor actuator, a suspension assembly and a vehicle. BACKGROUND

[0002] With the development of vehicle electrification, passengers' requirements for the ride comfort of vehicles are continuously improved, and electromagnetic active suspension is widely concerned. At present, most of the electromagnetic active suspension actuators adopt the form of combination of rotary motor and mechanical structure. In the combination form, the rotary motion output by the rotary motor is converted into linear motion acting on the vehicle body through the mechanical structure. However, due to the increase of the mechanical structure, the efficiency of the actuator is reduced, the structure is complex and thus inconvenient to install, so the active suspension system gradually adopts a levitation motor as its actuator. The levitation motor actuator needs to provide effective support to the vehicle body, but the radial size and axial size of the levitation motor actuator assembly generally increase due to the increase of the support structure. SUMMARY

[0003] The embodiments of the present application provide a levitation motor actuator, a suspension assembly and a vehicle which can provide effective support without additionally increasing the radial size and axial size of the levitation motor actuator.

[0004] In order to achieve the above-mentioned purpose, according to the first aspect of the present application, a levitation motor actuator is provided, which comprises: a stator assembly adapted to be connected to a vehicle body; a rotor assembly adapted to be connected to a vehicle wheel end load; a housing assembly, the stator assembly is fixed in the housing assembly; a part of the rotor assembly is located in the housing assembly and can have variable relative displacement relative to the stator assembly in the axial direction of the stator assembly; and an elastic support assembly, one end of the elastic support assembly abuts against the housing assembly, the other end of the elastic support assembly abuts against the rotor assembly; the elastic support assembly can be compressed or stretched in the axial direction of the stator assembly by the rotor assembly.

[0005] In some embodiments of the present application, the elastic support assembly is an equal-diameter variable-stiffness elastic support assembly; or, the elastic support assembly is a variable-diameter variable-stiffness elastic support assembly; or, the elastic support assembly is an equal-diameter constant-stiffness elastic support assembly.

[0006] In some embodiments of the present application, the housing assembly, the stator assembly and the rotor assembly have a first space therebetween, and the elastic support assembly is arranged in the first space.

[0007] In some embodiments of this application, the housing assembly includes a housing; a central rod disposed on the housing; a stator assembly disposed around the central rod and fixed to the housing; and a mover assembly disposed around the central rod and located between the stator assembly and the central rod.

[0008] In some embodiments of this application, the elastic support assembly includes a first elastic element located within the first space and disposed around the central rod. One end of the first elastic element abuts against the housing, and the other end of the first elastic element abuts against the moving part assembly.

[0009] In some embodiments of this application, the mover assembly includes a support assembly located within the housing assembly and disposed around the central rod; the support assembly includes a sliding shaft segment and a limiting boss, one end of the sliding shaft segment away from the central rod extending out of the housing assembly from the motor end cover, and the limiting boss being fixed on the sliding shaft segment; and a coil assembly fixed within the support assembly and located between the support assembly and the stator assembly.

[0010] In some embodiments of this application, the housing assembly includes a motor end cover fixed to the housing, a portion of the mover assembly is housed within the housing assembly, and another portion extends out of the housing assembly from the motor end cover; a second space exists between the housing, the motor end cover, and the mover assembly; wherein, the elastic support assembly further includes a second elastic member located within the second space, one end of the second elastic member abutting against the motor end cover, and the other end of the second elastic member abutting against the mover assembly.

[0011] In some embodiments of this application, a third space is provided between the central rod and the moving part assembly; wherein, the elastic support assembly includes a third elastic element, the third elastic element is located within the third space, one end of the third elastic element abuts against the moving part assembly, and the other end of the third elastic element abuts against the central rod.

[0012] According to a second aspect of this application, a levitation motor actuator is provided, the levitation motor actuator comprising:

[0013] Housing assembly;

[0014] A moving part assembly, partially located within the housing assembly, is capable of variable relative displacement with respect to the housing assembly; and

[0015] An elastic support assembly, one end of which abuts against the housing assembly and the other end of which abuts against the moving part assembly;

[0016] The elastic support component is a variable stiffness elastic support component.

[0017] In some embodiments of this application, the levitation motor actuator further includes a stator assembly fixed within a housing assembly; the housing assembly includes:

[0018] case;

[0019] A central rod is disposed on the housing; the stator assembly is disposed around the central rod and fixed to the housing; and the mover assembly is disposed around the central rod and located between the stator assembly and the central rod.

[0020] A motor end cover is fixed to the housing. A portion of the mover assembly is housed within the housing assembly, while another portion extends out of the housing assembly from the motor end cover.

[0021] In some embodiments of this application, the elastic support assembly includes a first elastic element located inside or outside the housing assembly.

[0022] In some embodiments of this application, a first space is provided between the housing, the stator assembly, the mover assembly and the central rod, a first elastic member is located in the first space and is disposed around the central rod, one end of the first elastic member abuts against the housing and the other end of the first elastic member abuts against the mover assembly.

[0023] In some embodiments of this application, the moving part component includes:

[0024] A support assembly, located within the housing assembly and arranged around the central rod; the support assembly includes a sliding shaft segment and a limiting boss, the end of the sliding shaft segment away from the central rod extending out of the housing assembly from the motor end cover, and the limiting boss being fixed to the sliding shaft segment; and

[0025] The coil assembly is fixed within the support assembly and located between the support assembly and the stator assembly.

[0026] In some embodiments of this application, the first elastic member is disposed around the sliding shaft segment, one end of the first elastic member abuts against the motor end cover, and the other end abuts against the limiting boss.

[0027] In some embodiments of this application, a second space is provided between the housing, the moving part assembly, and the motor end cover; the elastic support assembly further includes a second elastic member located within the second space, one end of the second elastic member abutting against the motor end cover, and the other end of the second elastic member abutting against the moving part assembly.

[0028] In some embodiments of this application, a third space is provided between the central rod and the moving part assembly; the elastic support assembly further includes a third elastic element located within the third space, one end of the third elastic element abutting against the moving part assembly, and the other end of the third elastic element abutting against the central rod.

[0029] In some embodiments of this application, the first elastic element is an elastic element with constant diameter or variable diameter.

[0030] In some embodiments of this application, the second elastic element is a constant stiffness elastic element or a variable stiffness elastic element.

[0031] In some embodiments of this application, the second elastic element is a constant diameter or variable diameter elastic element.

[0032] In some embodiments of this application, the third elastic element is a constant stiffness or variable stiffness elastic element.

[0033] In some embodiments of this application, the third elastic element is an elastic element with equal or variable diameter.

[0034] In some embodiments of this application, the support assembly includes: a first bracket located within the housing assembly and disposed around the central rod, the first bracket being at least partially disposed between the stator assembly and the central rod, at least a portion of the central rod being housed within the first bracket and capable of variable relative displacement within the first bracket along the axial direction of the stator assembly; and

[0035] In some embodiments of this application, the support assembly further includes: a second bracket connected to the end of the first bracket away from the first elastic member, and a third space is formed between the second bracket, the first bracket, and the central rod; wherein, there is an accommodating space between the first bracket and the second bracket, and the coil assembly is fixed within the accommodating space.

[0036] In some embodiments of this application, the motor end cover is fixedly connected to one end of the housing; the end of the second bracket away from the first bracket extends out from the motor end cover; wherein, there is a second space between the housing, the motor end cover and the second bracket.

[0037] In some embodiments of this application, the first bracket includes: a coil mounting shaft segment disposed around the central rod, the coil assembly disposed on the coil mounting shaft segment; and a flange portion fixedly connected to one end of the coil mounting shaft segment; the end of the flange portion away from the coil mounting shaft segment is slidably engaged with the stator assembly, and the end of the coil mounting shaft segment away from the flange portion is connected to the second bracket.

[0038] In some embodiments of this application, the second bracket includes: a limiting portion having a groove; one end of the coil mounting shaft segment away from the flange portion located within the groove and detachably connected to the inner wall of the groove; a sliding shaft segment fixedly connected to the end of the limiting portion away from the coil mounting shaft segment; and a first protrusion disposed on the outer wall of the limiting portion opposite to the groove; one end of the coil assembly away from the first elastic member abutting against the limiting portion, one end of the first protrusion away from the limiting portion slidingly engaging with the stator assembly, and one end of the sliding shaft segment away from the limiting portion extending from inside the motor end cover to outside the motor end cover and configured to connect to the wheel end load of the vehicle.

[0039] In some embodiments of this application, the second bracket further includes: a limiting portion fixing shaft, located within the groove and fixed to the bottom of the groove; the limiting portion fixing shaft extends along the axial direction of the stator assembly; and a buffer member disposed on the limiting portion fixing shaft; a buffer hole is provided on the central rod, the buffer hole being positioned opposite to the limiting portion fixing shaft; and the size of the buffer hole is larger than the size of the limiting portion fixing shaft in the radial direction perpendicular to the axial direction of the stator assembly.

[0040] In some embodiments of this application, the motor end cover includes: a main body having a third receiving cavity, a fourth receiving cavity, and a fifth receiving cavity; the third receiving cavity communicating with the third space and the third receiving cavity communicating with the fourth receiving cavity; and a second protrusion disposed on the outer wall of the main body away from the third receiving cavity; one end of the stator assembly away from the first elastic member abutting against the main body; one end of the housing away from the first elastic member being detachably connected to the second protrusion; a portion of the second elastic member being received in the third receiving cavity and the fourth receiving cavity; and one end of the sliding shaft segment extending out of the motor housing from the fifth receiving cavity.

[0041] In some embodiments of this application, the housing assembly further includes a connecting shaft segment fixed to the side of the housing opposite to the central rod and configured to connect to the vehicle body.

[0042] In some embodiments of this application, the housing includes a side wall and a bottom wall, the side wall being fixedly connected to one side of the bottom wall and extending along the axial direction of the stator assembly; and the center rod and the connecting shaft segment being disposed on both sides of the bottom wall in the axial direction of the stator assembly; the side wall having a stepped portion, and the stator assembly being fixed on the stepped portion.

[0043] In some embodiments of this application, the stator assembly includes: a permanent magnet assembly fixed inside the housing; one end of the permanent magnet assembly abuts against the housing, and the other end abuts against the motor end cover.

[0044] In some embodiments of this application, the permanent magnet assembly includes axially magnetized permanent magnet elements and / or radially magnetized permanent magnet elements, which are arranged axially and / or radially magnetized permanent magnet elements in the axial direction of the stator assembly.

[0045] In some embodiments of this application, the stator assembly further includes: a sleeve disposed between the permanent magnet assembly and the mover assembly; the permanent magnet assembly is disposed around the sleeve and located between the housing and the sleeve, one end of the sleeve abuts against the housing and the other end abuts against the motor end cover, and one end of the mover assembly opposite to the central rod is slidably engaged with the sleeve.

[0046] A third aspect of this application also provides a suspension assembly including the suspension motor actuator described above.

[0047] A fourth aspect of this application also provides a vehicle that includes the suspension assembly described above.

[0048] The suspension motor actuator, suspension assembly, and vehicle provided in this application include a suspension motor actuator comprising a housing assembly, a stator assembly, and an elastic support assembly. The stator assembly and the mover assembly are both fixed within the housing assembly. The mover assembly is capable of variable relative displacement with respect to the stator assembly and the housing assembly. One end of the elastic support assembly abuts against the housing assembly, and the other end abuts against the mover assembly. By providing the elastic support assembly, the system can simultaneously provide cushioning and support when the mover assembly moves relative to the housing assembly and the stator assembly, thereby improving the system's stability and adaptability.

[0049] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0050] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0051] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0052] Figure 1 This is a perspective view of a suspension assembly provided for some exemplary embodiments of this application.

[0053] Figure 2 for Figure 1The side view of the suspension assembly shown.

[0054] Figure 3 For along Figure 2 The sectional view of section AA.

[0055] Figure 4 for Figure 3 A cross-sectional view of the housing assembly of the levitation motor actuator shown.

[0056] Figure 5 for Figure 3 The diagram shows a cross-sectional view of the mover assembly and stator assembly of the levitation motor actuator.

[0057] Figure 6 for Figure 5 A cross-sectional view of the first support of the moving part assembly shown.

[0058] Figure 7 for Figure 6 The diagram shows a three-dimensional representation of the first support.

[0059] Figure 8 for Figure 5 A cross-sectional view of the second support of the moving part assembly shown.

[0060] Figure 9 for Figure 8 The diagram shows a three-dimensional representation of the second support.

[0061] Figure 10 for Figure 3 The cross-sectional view of the motor end cover shown.

[0062] Figure 11 for Figure 10 The diagram shows a three-dimensional representation of the motor end cover.

[0063] Figure 12 A cross-sectional view of a suspension assembly provided for some other exemplary embodiments.

[0064] Figure 13 A cross-sectional view of a suspension assembly provided for some further exemplary embodiments.

[0065] Figure 14 A cross-sectional view of a suspension assembly provided for some exemplary embodiments.

[0066] Figure 15 and Figure 16 A cross-sectional view of a suspension assembly provided for some other exemplary embodiments.

[0067] Figure 17 This is a schematic diagram of a vehicle module provided in an exemplary embodiment of this application.

[0068] Explanation of reference numerals in the attached figures:

[0069] 1000, Vehicle; 100 / 200 / 300 / 400, Suspension Assembly; 110 / 210, Suspension Motor Actuator; 120, Wheel Connector; 500, Body;

[0070] 10. Housing assembly; 11. Housing; 111. Bottom wall; 112. Side wall; 113. Stepped portion; 12. Center rod; 121. Buffer hole; 13. First receiving cavity; 14. Connecting shaft section; 15. Connecting boss; L1. First space; 16. Motor end cover

[0071] 20. Moving part assembly; 21. Coil assembly; 22. Support assembly; 221. First bracket; 2211. Coil mounting shaft section; 2212. Flange; 2213. Connecting end; 222. Second bracket; 231. Limiting part; 232. First protrusion; 233. First groove; 234. Limiting part fixing shaft; 235. Second groove; 236. Sliding shaft section; 237. Limiting boss; 24. Second receiving cavity; 25. Accommodating space; 26. Buffer; L2. Third space;

[0072] 30. Stator assembly; 31. Permanent magnet assembly; 311. Axially magnetized permanent magnet element; 312. Radially magnetized permanent magnet element; 32. Sleeve;

[0073] 41. Main body; 42. Second protrusion; 43. Third receiving cavity; 44. Fourth receiving cavity; 45. Fifth receiving cavity; 46. Boss; 47. Buffer body; 401. Stop feature;

[0074] 50. Elastic support assembly; 51. First elastic element; 52. Second elastic element; 53. Third elastic element; 501. Second space. Detailed Implementation

[0075] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0076] Please see Figures 1 to 12This application provides an exemplary embodiment of a levitation motor actuator 110, which includes a housing assembly 10, a mover assembly 20, a stator assembly 30, and an elastic support assembly 50. Both the mover assembly 20 and the stator assembly 30 are disposed within the housing assembly 10. A portion of the mover assembly 20 is located within the housing assembly 10 and is capable of variable relative displacement with respect to the stator assembly 30 along the axial direction Z. The elastic support assembly 50 is capable of compressing or stretching the mover assembly 20 along the axial direction Z of the stator assembly 30. One end of the elastic support assembly 50 abuts against the housing assembly 10, and the other end abuts against the mover assembly 20. The elastic support assembly 50 is a variable stiffness elastic support assembly.

[0077] Among them, the variable stiffness elastic element can better adapt to the external excitation force under different compression strokes, and can provide sufficient support for the vehicle body without increasing the radial and axial dimensions of the suspension motor actuator.

[0078] Please refer to it again. Figure 3 The housing assembly 10 includes a housing 11 and a central rod 12, with the central rod 12 fixedly disposed within the housing 11. A first receiving cavity 13 is provided between the housing 11 and the central rod 12. The stator assembly 30 is disposed around the central rod 12 and fixed within the housing 11. The mover assembly 20 is disposed around the central rod 12 and located between the stator assembly 30 and the central rod 12. The mover assembly 20 is capable of variable relative displacement with respect to the stator assembly 30 and the central rod 12. The elastic support assembly 50 includes a first elastic element 51 disposed around the central rod 12. The first elastic element 51 is located between the mover assembly 20 and the housing 11 along the axial Z-axis of the stator assembly 30. That is, the housing 11, the central rod 12, the stator assembly 30 and the mover assembly 20 constitute the first space L1, and the first elastic element 51 is disposed in the first space L1. As the mover assembly 20 moves relative to the stator assembly 30 in the axial direction Z of the stator assembly 30, the axial height and volume of the first space L1 change accordingly, and the axial height of the first elastic element 51 also changes accordingly.

[0079] This application provides effective support for the vehicle body 500 by embedding the first elastic element 51 within the first space L1 formed by the housing 11, the central rod 12, the stator assembly 30, and the mover assembly 20. Furthermore, since the first elastic element 51 is arranged around the central rod 12 and located within the first receiving cavity 13 for the movement of the mover assembly 20, the first elastic element 51 does not occupy additional space in the suspension motor actuator 110.

[0080] Verification has shown that placing the elastic element externally, such as on the connecting shaft section 14 of the housing, requires the elastic element to abut against the bottom wall of the housing, and the length of the elastic element cannot exceed the thread of the connecting shaft section 14. To achieve better support, the length of the connecting shaft section 14 and the radial width of the bottom wall of the housing will both increase, thus increasing the maximum axial and radial dimensions of the suspension motor actuator assembly. Conversely, having the elastic support assembly 50 (first elastic element 51) built-in does not require additional increases in the housing size to ensure the elastic element's support of the vehicle body. Furthermore, the built-in elastic support assembly 50 does not additionally increase the radial and axial dimensions of the suspension motor actuator. While ensuring the effective stroke of the suspension motor actuator, this helps to keep the maximum radial and axial dimensions of the suspension motor actuator assembly within a reasonable range.

[0081] In some embodiments of this application, the first elastic element 51 is a variable stiffness elastic element. A variable stiffness elastic element refers to an elastic element whose stiffness is variable during axial compression, where the axial direction refers to the Z-axis of the specified sub-assembly 30, and the pitch of the elastic element changes. Under the same conditions of other factors (such as support load and stiffness), the mean diameter of the helical spring is inversely related to the compression height of the helical spring (when the actuator is at zero stroke). The zero stroke position of the suspension motor actuator refers to the position of the first elastic element 51 when the actuator is not operating.

[0082] Among them, the constant stiffness elastic element behaves relatively stiffly when the external excitation force is small, and relatively softly when the external excitation force is large. In order to better adapt to the external excitation force under different compression strokes, the variable stiffness elastic element is a better choice. Therefore, using the variable stiffness elastic element as the first elastic element 51 can provide sufficient support for the vehicle body without increasing the radial and axial dimensions of the suspension motor actuator.

[0083] In addition, depending on the constraints of the arrangement space, variable stiffness elastic elements can be in the form of variable diameter or constant diameter, and their stiffness change is mainly reflected by the change of pitch.

[0084] Specifically, please refer to Figure 3 In some embodiments of this application, the first elastic element 51 is a variable-diameter, variable-stiffness helical spring. Since there is stress at the connection between the central rod 12 and the housing 11, an arc-shaped transition surface feature is designed at the connection. To accommodate this arc-shaped transition surface feature, the outer diameter of the end of the first elastic element 51 closest to the mover assembly 20 is smaller than the outer diameter of the end of the first elastic element 51 furthest from the mover assembly 20. In this embodiment, the outer diameter of the first elastic element 51 gradually decreases from the end furthest from the mover assembly 20 to the end closest to the mover assembly 20.

[0085] Specifically, please refer to Figure 12 In some embodiments of this application, the first elastic element 51 is a constant-diameter variable-stiffness helical spring. That is, the outer diameter of the end of the first elastic element 51 closest to the mover assembly 20 is equal to the outer diameter of the end of the first elastic element 51 furthest from the mover assembly 20.

[0086] The first elastic element 51 has two ends that abut against the housing 11 and the moving part assembly 20, respectively. The first elastic element 51 is always in a compressed state.

[0087] Please refer to it again. Figure 4 The housing 11 includes a bottom wall 111 and a side wall 112. The side wall 112 is fixedly connected to one side of the bottom wall 111 and extends along the axial direction Z of the stator assembly 30. The side wall 112 has a stepped portion 113, and the stator assembly 30 is fixed to the stepped portion 113.

[0088] The center rod 12 has a buffer hole 121 extending along the axial direction Z of the stator assembly 30. When the mover assembly 20 moves along the axial direction Z of the stator assembly 30 toward the center rod 12 and when the mover assembly is about to contact the end of the center rod 12 away from the bottom wall 111, the buffer hole 121 is configured to buffer the mover assembly 20.

[0089] The housing assembly 10 further includes a connecting shaft segment 14, which is fixed to the side of the bottom wall 111 opposite to the center rod 12 and configured to connect to the vehicle body 500. In some embodiments, the connecting shaft segment 14 is threadedly connected to the vehicle body 500. The housing assembly 10 also includes a connecting boss 15, which is configured to connect to the motor end cover 40 and is disposed on the outer peripheral wall of the side wall 112 at the end away from the bottom wall 111.

[0090] Please see Figures 5 to 7 The mover assembly 20 includes a coil assembly 21 and a support assembly 22. The coil assembly 21 is fixed within the support assembly 22 and located between the support assembly 22 and the stator assembly 30. The support assembly 22 is located within the first receiving cavity 13 and is arranged around the central rod 12. The support assembly 22 is at least partially disposed between the stator assembly 30 and the central rod 12. One end of the first elastic member 51 in the axial direction Z of the stator assembly 30 is fixedly connected to the support assembly 22. The support assembly 22 is capable of variable relative displacement within the first receiving cavity 13 along the axial direction Z of the stator assembly 30.

[0091] In this design, coil assembly 21 acts as the mover. When an alternating current is passed through coil assembly 21, a changing excitation magnetic field is generated within it. This changing excitation magnetic field interacts with the permanent constant magnetic field generated by stator assembly 30, producing a traveling wave magnetic field and generating thrust. Under this thrust, mover assembly 20 can generate reciprocating linear motion along the Z-axis of stator assembly 30. Mover assembly 20 primarily drives the wheel-end load of the vehicle, thereby transmitting the wheel's motion to mover assembly 20. The wheel-end load includes, but is not limited to, the wheel, part of the braking system, and the lower suspension mass block. By actively controlling the dynamic state of the wheel-end, the vehicle's attitude is controlled to achieve the desired target, thus realizing fully active real-time adjustment of the suspension. This results in fast response time, large thrust, high speed, and high response frequency, significantly improving the driving and riding experience for occupants during vehicle operation.

[0092] The coil assembly 21 may include an iron core, a three-phase coil, insulation components, etc., which will not be described in detail here.

[0093] The support component 22 is used to protect and limit the coil component 21 and drive the load at the wheel end of the vehicle. The support component 22 moves linearly along the axial direction Z of the stator component 30 as the coil component 21 moves.

[0094] Please refer to it again. Figure 5 The support assembly 22 includes a first bracket 221 and a second bracket 222. The first bracket 221 is located within the first receiving cavity 13 and is disposed around the central rod 12. The first bracket 221 is at least partially disposed between the stator assembly 30 and the central rod 12. The first bracket 221 has a second receiving cavity 24, within which at least a portion of the central rod 12 is received and is capable of variable relative displacement along the axial direction Z of the stator assembly 30 within the second receiving cavity 24. The second bracket 222 is connected to the end of the first bracket 221 away from the first elastic member 51 and covers the end of the second receiving cavity 24 away from the first elastic member 51. The other end of the second bracket 222 protrudes from the housing 11. A receiving space 25 is provided between the first bracket 221 and the second bracket 222. The coil assembly 21 is fixed within the receiving space 25. The first bracket 221 and the second bracket 222 cooperate to prevent the coil assembly 21 from loosening during movement.

[0095] There is a third space L2 between the first support 221, the second support 222 and the central rod 12. The third space L2 is part of the second receiving cavity 24. When the central rod 12 moves along the axial direction of the stator assembly 30, the axial height and volume of the third space L2 change.

[0096] Please refer to it again. Figure 6 , Figure 7 and Figure 3The first bracket 221 includes a coil mounting shaft section 2211, a flange portion 2212, and a connecting end 2213. The flange portion 2212 and the connecting end 2213 are located at opposite ends of the coil mounting shaft section 2211 along the axial direction Z of the stator assembly 30. The coil mounting shaft section 2211 is arranged around the central rod 12, and the coil assembly 21 is mounted on the coil mounting shaft section 2211. The flange portion 2212 is fixedly connected to one end of the coil mounting shaft section 2211. The end of the flange portion 2212 away from the coil mounting shaft section 2211 is slidably engaged with the stator assembly 30, and the connecting end 2213 is connected to the second bracket 222.

[0097] Please refer to it again. Figure 8 , Figure 9 and Figure 3 The second bracket 222 includes a limiting part 231, a sliding shaft section 236, and a first protrusion 232. The limiting part 231 has a first groove 233. One end of the coil mounting shaft section 2211 away from the flange part 2212 is located in the first groove 233 and is detachably connected to the inner wall of the first groove 233. The sliding shaft section 236 is fixedly connected to one end of the limiting part 231 away from the coil mounting shaft section 2211. The first protrusion 232 is disposed on the outer wall of the limiting part 231 opposite to the first groove 233. One end of the coil assembly 21 away from the first elastic member 51 abuts against the limiting part 231. One end of the first protrusion 232 away from the limiting part 231 is slidably engaged with the stator assembly 30. One end of the sliding shaft section 236 away from the limiting part 231 extends from inside the motor end cover 40 to outside the motor end cover 40 and is configured to connect to the wheel end load of the vehicle. The outer peripheral surface of the sliding shaft section 236 and the fifth receiving cavity 45 of the motor end cover 40 can maintain a sliding fit with a low coefficient of friction.

[0098] The second bracket 222 further includes a limiting fixing shaft 234, located within the first groove 233 and fixed to the bottom of the first groove 233; the limiting fixing shaft 234 extends along the axial direction Z of the stator assembly 30. The limiting fixing shaft 234 is positioned opposite to the buffer hole 121, and the size of the buffer hole 121 is larger than the size of the limiting fixing shaft 234 in the radial direction X perpendicular to the axial direction Z of the stator assembly 30. When the mover assembly 20 moves along the axial direction Z of the stator assembly 30 toward the center rod 12 and when the mover assembly is about to contact the end of the center rod 12 away from the bottom wall 111, a portion of the limiting fixing shaft 234 can be inserted into the buffer hole 121 to buffer the mover assembly 20.

[0099] In some embodiments, the mover assembly 20 further includes a buffer 26 disposed on the limiting portion fixing shaft 234. When the mover assembly 20 moves along the axial direction Z of the stator assembly 30 towards the center rod 12 and the mover assembly is about to contact the end of the center rod 12 away from the bottom wall 111, the limiting portion fixing shaft 234 can be inserted into the buffer hole 121, and the buffer 26 contacts the end of the center rod 12 away from the bottom wall 111 to further buffer the mover assembly 20.

[0100] In some embodiments, the bottom of the limiting portion 231 also has a second groove 235, which communicates with the first groove 233. The first groove 233 is closer to the coil assembly 21 than the second groove 235. The connecting end 2213 of the first bracket 221 is received in the first groove 233, and the buffer 26 is received in the first groove 233 and the second groove 235. The size of the second groove 235 is slightly larger than the size of the buffer 26.

[0101] Please refer to it again. Figure 5 The stator assembly 30 includes a permanent magnet assembly 31, which is fixed to the stepped portion 113 of the housing 11. One end of the permanent magnet assembly 31 abuts against the housing 11, and the other end abuts against the motor end cover 40.

[0102] In some embodiments of this application, the permanent magnet assembly 31 includes an axially magnetized permanent magnet element 311 and a radially magnetized permanent magnet element 312. Both the axially magnetized permanent magnet element 311 and the radially magnetized permanent magnet element 312 are annular. The axially magnetized permanent magnet element 311 and the radially magnetized permanent magnet element 312 are alternately arranged adjacent to each other along the Z-axis of the stator assembly 30 to a desired height. The permanent magnet assembly 31 provides a permanent constant magnetic field as the stator.

[0103] In other embodiments, the permanent magnet assembly 31 may also include only one of the axially magnetized permanent magnet element 311 and the radially magnetized permanent magnet element 312.

[0104] In some embodiments of this application, the permanent magnet assembly 31 is bonded to the inner side of the housing 11 by means of adhesive coating on the outer peripheral surface.

[0105] In some embodiments of this application, the stator assembly 30 further includes a sleeve 32, which is disposed between the permanent magnet assembly 31 and the mover assembly 20 and housed on the stepped portion 113 and surrounding the mover assembly 20. The permanent magnet assembly 31 is disposed around the sleeve 32 and located between the housing 11 and the sleeve 32. One end of the sleeve 32 abuts against the stepped portion 113, and the other end abuts against the motor end cover 40. The ends of the coil assembly 21 and the support assembly 22 opposite to the central rod 12 are respectively slidably engaged with the sleeve 32.

[0106] The axial length of the sleeve 32 is not less than the axial length of the permanent magnet assembly 31. The axial length refers to the length of the sleeve 32 and the permanent magnet assembly 31 along the axial direction Z of the stator assembly 30.

[0107] In some embodiments of this application, the sleeve 32 is bonded to the inner circumferential surface of the permanent magnet assembly 31 by means of adhesive coating on the outer circumferential surface.

[0108] In some embodiments of this application, the sleeve 32 is cylindrical or the like.

[0109] Among them, a sleeve 32 is provided on the outer wall (outer peripheral surface) side of the permanent magnet assembly 31. The permanent magnet assembly 31 is restricted between the sleeve, the side wall 112 of the housing 11 and the motor end cover 40 through the sleeve 32, the housing 11 and the motor end cover 40, which effectively constrains the movable space of the permanent magnet assembly 31, reduces the risk of the permanent magnet assembly 31 falling off, and thus ensures the stability and reliability of the constant magnetic field generated by the permanent magnet assembly 31.

[0110] Compared to placing the mover assembly outside the stator assembly (i.e., the stator assembly is external and the mover assembly is internal), this application places the stator assembly 30 outside the mover assembly 20 (i.e., the stator assembly 30 is external and the mover assembly 20 is internal). This allows for a larger air gap diameter within the limited space (first receiving cavity 13), thereby providing greater active thrust. Here, the air gap refers to the gap between the mover assembly 20 and the stator assembly 30, and the air gap diameter refers to the radial dimension of the air gap.

[0111] Please refer to it again. Figure 3 and Figure 5 In some embodiments, the levitation motor actuator 110 further includes a motor end cover 40, which is fixedly connected to the end of the housing 11 away from the first elastic member 51; the end of the second bracket 222 away from the first bracket 221 (sliding shaft segment 236) extends out from the motor end cover 40; a second space 501 is provided between the housing 11, the motor end cover 40, and the second bracket 222, and the second bracket 222 is also capable of variable relative displacement along the axial direction Z of the stator assembly 30 within the second space 501. When the mover assembly 20 moves along the axial direction Z of the stator assembly 30, the axial height and volume of the second space 501 also change accordingly.

[0112] Please refer to it again. Figure 10 and Figure 11 The motor end cover 40 includes a main body 41 and a second protrusion 42, the second protrusion 42 being disposed on the outer peripheral wall of the main body 41 near the end of the housing 11.

[0113] The main body 41 is stepped and has a third receiving cavity 43, a fourth receiving cavity 44, and a fifth receiving cavity 45. The third receiving cavity 43 is connected to the second space 501 and the fourth receiving cavity 44, respectively, and the fifth receiving cavity 45 is connected to the fourth receiving cavity 44. In the radial direction perpendicular to the axial direction Z of the stator assembly 30, the size of the third receiving cavity 43 is larger than the size of the fourth receiving cavity 44, and the size of the fourth receiving cavity 44 is larger than the size of the fifth receiving cavity 45. The end of the stator assembly 30 away from the first elastic member 51 abuts against the main body 41, and the end of the housing 11 away from the first elastic member 51 is detachably connected to the second protrusion 42.

[0114] The radial dimension of the third receiving cavity 43 is slightly larger than the maximum radial dimension of the second support 222 of the moving part assembly 20, so as to accommodate the first protrusion 232 of the moving part assembly 20, and the radial dimension of the fourth receiving cavity 44 is slightly larger than the radial dimension of the limiting part 231 of the moving part assembly 20.

[0115] In this embodiment, the second protrusion 42 is disposed on the outer wall of the main body 41 opposite to the third receiving cavity 43. A stop feature 401 is formed between the second protrusion 42 and the main body 41 to ensure the coaxiality of the motor end cover 40 and the housing 11. The upper end face of the stop feature 401 restricts the axial installation position of the stator assembly 30 inside the housing 11, thereby reducing the risk of the stator assembly 30 falling off.

[0116] In this embodiment, the second protrusion 42 is detachably and fixedly connected to the connecting boss 15 of the housing 11, such as by a threaded connection.

[0117] Please refer to it again. Figure 3 and Figure 10 The motor end cover 40 also includes a boss 46 and a buffer body 47. The boss 46 is located on the bottom wall of the fourth receiving cavity 44. The buffer body 47 is fixed on the boss 46. When the mover assembly 20 slides along the axial Z of the stator assembly 30 until the bottom wall of the limiting part 231 of the mover assembly 20 contacts the bottom wall of the fourth receiving cavity 44 of the motor end cover 40, the buffer body 47 provides a buffering effect on the limiting part 231 of the mover assembly 20.

[0118] In other embodiments, buffer bodies may also be provided between the first elastic member 51 and the bottom wall 111 of the housing 11, and between the first elastic member 51 and the first support 221 of the mover assembly 20.

[0119] Please see Figures 13 to 14In other embodiments of this application, another type of suspension motor actuator 210 is provided. The structure of suspension motor actuator 210 is basically the same as that of suspension motor actuator 110. The difference is that suspension motor actuator 210 also includes a second elastic element 52. The second elastic element 52 is disposed in the second space 501 and sleeved on the sliding shaft segment 236 of the second bracket 222 of the support assembly 22.

[0120] In some embodiments of this application, the second elastic element 52 is a constant stiffness elastic element. Specifically, the second elastic element 52 is a constant stiffness helical spring.

[0121] The second elastic element 52 abuts against the mover assembly 20 and the motor end cover 40 respectively, and the second elastic element 52 is always in a compressed state.

[0122] Since the maximum inner diameter of the housing 11 and the maximum axial height of the first space L1 are limited, one first elastic element may not be sufficient to provide adequate support. Therefore, a second elastic element 52 (auxiliary elastic element) is provided in the second space 501, and the second elastic element 52 and the first elastic element 51 (main elastic element) are connected in series (the first elastic element 51 and the second elastic element 52 respectively abut against the moving part assembly 20). The second elastic element 52 and the first elastic element 51 jointly provide support. Therefore, the relevant dimensional parameters of the first elastic element 51 can be further compressed to provide better arrangement flexibility.

[0123] In some embodiments of this application, a portion of the second elastic element 52 is housed within the third housing cavity 43 and the fourth housing cavity 44, and one end of the sliding shaft segment 236 extends out of the motor end cover 40 from within the fifth housing cavity 45.

[0124] Since the volume of the first receiving cavity 13 is greater than the volume of the second space 501, the radial dimension of the first elastic member 51 is greater than the radial dimension of the second elastic member 52.

[0125] Please refer to it again. Figure 13 In some embodiments of this application, the first elastic element 51 is a variable diameter and variable stiffness elastic element, and the second elastic element 52 is a constant diameter and constant stiffness elastic element.

[0126] Please refer to it again. Figure 14 In some embodiments of this application, the first elastic element 51 is a constant diameter variable stiffness elastic element, and the second elastic element 52 is a constant diameter constant stiffness elastic element.

[0127] Please refer to it again. Figure 3 , Figure 12 and Figure 14 The second aspect of this application also provides a suspension assembly 100 / 200, which includes the suspension motor actuator 110 / 210 as described above.

[0128] In some embodiments of this application, the suspension assembly 100 / 200 further includes a wheel connector 120, wherein the sliding shaft segment 236 of the mover assembly 20 of the housing 11 of the suspension motor actuator 110 is connected to the wheel connector 120, and the wheel connector 120 is configured to connect the wheel end load of the vehicle.

[0129] Please refer to it again. Figure 15 This application also provides a suspension assembly 300. The structure of the suspension motor actuator of the suspension assembly 300 is basically the same as that of the suspension motor actuator 110 of the suspension assembly 100, except that it also includes a third elastic element 53. The third elastic element 53 is located in the third space L2. One end of the third elastic element 53 abuts against the center rod 12, and the other end abuts against the support component 22 of the mover assembly 20. In this embodiment, by placing the third elastic element 53 in the third space L2, the first elastic element 51, the second elastic element 52, and the third elastic element 53 can jointly provide support. This not only provides effective support but also helps to control the maximum radial and axial dimensions of the suspension motor actuator assembly within a reasonable range while ensuring the effective stroke of the suspension motor mover. In addition, placing the third elastic element 53 in the third space L2 can also prevent the center rod 12 from colliding with the support component 22 of the mover assembly 20.

[0130] Please see Figure 16 This application also provides a suspension assembly 400. The structure of the suspension motor actuator of the suspension assembly 400 is basically the same as that of the suspension motor actuator of the suspension assembly 100. The difference is that the first elastic element 51 of the suspension motor actuator of the suspension assembly 400 is not located in the first space L1, but is sleeved on the sliding shaft section 236. The second bracket 222 also includes a limiting boss 237. The limiting boss 237 is fixed on the sliding shaft section 236. One end of the first elastic element 51 abuts against the motor end cover, and the other end abuts against the limiting boss 237.

[0131] In this embodiment, the suspension motor actuator of the suspension assembly 400 only includes the first elastic element 51, and the first elastic element 51 is slidably connected to the sliding shaft section 236. When the mover assembly moves relative to the housing assembly 10 and the stator assembly 30, the first elastic element 51 can also provide certain support to the vehicle body and, under the premise of ensuring the effective stroke of the suspension motor mover, help to control the maximum radial dimension and the maximum axial dimension of the suspension motor actuator assembly within a reasonable range.

[0132] Please see Figure 17The third aspect of this application also provides a vehicle 1000, which includes a suspension assembly 100 / 200 / 300 / 400 as described above, a body 500 and wheel loads (not shown). The body 500 is connected to the connecting shaft section 14 of the housing of the suspension assembly 100 / 200 / 300 / 400, and the wheel loads are connected to the wheel connectors 120 of the suspension assembly 100 / 200 / 300 / 400.

[0133] The suspension motor actuator, suspension assembly, and vehicle provided in this application include: a housing assembly comprising a housing and a central rod, the central rod being fixedly disposed within the housing, and a first receiving cavity between the housing and the central rod; a stator assembly located within the first receiving cavity and fixed to the housing; a mover assembly disposed around the central rod and located between the stator assembly and the central rod, the mover assembly being capable of variable relative displacement with respect to the stator assembly and the central rod; and an elastic support assembly comprising a first elastic element disposed around the central rod, the first elastic element being located between the housing and the mover assembly along the axial direction of the stator assembly, the first elastic element and the mover assembly being arranged along the axial direction of the stator assembly. Thus, by embedding the first elastic element within the first space formed by the housing, the central rod, and the mover assembly, the vehicle body is effectively supported. Furthermore, since the first elastic element is sleeved on the central rod and located within the first receiving cavity (embedded in the elastic support assembly) for the movement of the mover assembly, the first elastic element does not occupy additional space in the suspension motor actuator. In other words, embedding the elastic support assembly does not require increasing the size of the housing to ensure the supporting effect of the elastic element on the vehicle body. Under the premise of ensuring the effective stroke of the suspension motor mover, it is beneficial to control the maximum radial dimension and the maximum axial dimension of the suspension motor actuator assembly within a reasonable range.

[0134] In addition, by using a variable stiffness elastic element as the first elastic element, sufficient support can be provided for the vehicle body without increasing the radial and axial dimensions of the suspension motor actuator.

[0135] In addition, a second elastic element is set in the third space, and the second elastic element (auxiliary elastic element) and the first elastic element (main elastic element) are connected in series. Under the combined action of the second elastic element and the first elastic element, the relevant dimensional parameters of the first elastic element can be further compressed to provide better arrangement.

[0136] In addition, compared to the scheme of placing the mover assembly externally and the stator assembly internally, this application places the stator assembly externally and the mover assembly internally, which can obtain a larger air gap diameter under limited space constraints, thereby providing greater active thrust.

[0137] Furthermore, in this application, the coil assembly of the suspension motor actuator is used as the mover. When an alternating current is passed through the coil assembly, a changing excitation magnetic field is generated. This changing excitation magnetic field interacts with the permanent constant magnetic field generated by the stator assembly, producing a traveling wave magnetic field and generating thrust. Under this thrust, the mover assembly can generate a reciprocating linear motion along the axis of the stator assembly. The mover assembly primarily drives the load at the vehicle's wheel ends, thereby transmitting the wheel's motion to the mover assembly. By actively controlling the dynamic state at the wheel ends, the vehicle's attitude is controlled to achieve the desired goal, thus realizing fully active real-time adjustment of the suspension. This results in fast response time, large thrust, high speed, and high response frequency, significantly improving the driving and riding experience for occupants during vehicle operation.

[0138] 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 technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0139] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0140] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0141] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Although the descriptions of each embodiment in this application have different focuses, and the parts not described in detail in a certain embodiment can be referred to the relevant embodiments in other embodiments, any modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of this application without departing from the content of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A levitation motor actuator, characterized in that, include: Stator assembly (30), said stator assembly (30) being adapted to connect to the body of a vehicle; A mover assembly (20) adapted to connect a wheel-end load of a vehicle; A housing assembly (10), wherein the stator assembly (30) is fixed within the housing assembly (10); a portion of the mover assembly (20) is located within the housing assembly (10) and is capable of variable relative displacement with respect to the stator assembly (30) along the axial direction of the stator assembly (30); and An elastic support assembly (50) is provided, one end of which abuts against the housing assembly (10), and the other end of which abuts against the moving part assembly (20). The elastic support component (50) can be compressed or stretched axially by the mover component (20) in the stator component (30).

2. The levitation motor actuator according to claim 1, characterized in that, The elastic support component (50) is a constant-diameter variable-stiffness elastic support component; or, The elastic support component (50) is a variable diameter, variable stiffness elastic support component; or, The elastic support component (50) is an elastic support component with constant diameter and constant stiffness.

3. The levitation motor actuator according to claim 1, characterized in that, A first space exists between the housing assembly, the stator assembly, and the mover assembly, and the elastic support assembly (50) is disposed within the first space.

4. The levitation motor actuator according to claim 3, characterized in that, The housing assembly includes: case; A center rod is disposed on the housing, the stator assembly is disposed around the center rod and fixed to the housing, and the mover assembly is disposed around the center rod and located between the stator assembly and the center rod.

5. The levitation motor actuator according to claim 4, characterized in that, The elastic support assembly (50) includes a first elastic element located within the first space and arranged around the central rod. One end of the first elastic element abuts against the housing, and the other end of the first elastic element abuts against the moving part assembly.

6. The levitation motor actuator according to claim 4, characterized in that, The moving part component includes: A support assembly, located within the housing assembly and arranged around the central rod; the support assembly includes a sliding shaft segment and a limiting boss, the end of the sliding shaft segment away from the central rod extending out of the housing assembly from the motor end cover, and the limiting boss being fixed to the sliding shaft segment; and The coil assembly is fixed within the support assembly and located between the support assembly and the stator assembly.

7. The levitation motor actuator according to claim 4, characterized in that, The housing assembly includes a motor end cover, which is fixed to the housing. A portion of the mover assembly is housed within the housing assembly, and another portion extends out of the housing assembly from the motor end cover. A second space exists between the housing, the motor end cover, and the mover assembly; The elastic support assembly further includes a second elastic element located within the second space. One end of the second elastic element abuts against the motor end cover, and the other end of the second elastic element abuts against the moving part assembly.

8. The levitation motor actuator according to claim 4, characterized in that, There is a third space between the central rod and the moving part assembly; The elastic support assembly includes a third elastic element located within the third space. One end of the third elastic element abuts against the moving part assembly, and the other end of the third elastic element abuts against the central rod.

9. A suspension assembly, characterized in that, Includes the levitation motor actuator as described in any one of claims 1 to 8.

10. A vehicle, characterized in that, Includes the suspension motor actuator as described in any one of claims 1 to 8 or the suspension assembly as described in claim 9.

Images