Suspension motor actuator, suspension assembly and vehicle

Abstract

The utility model 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 is located in the shell assembly, one end of the elastic supporting assembly abuts against the shell assembly, and the other end of the elastic supporting assembly abuts against the rotor assembly. The suspension motor actuator, the suspension assembly and the vehicle can provide effective support.

Description

Technical Field

[0001] This application relates to the field of electronic technologies, and in particular, to a suspension motor actuator, a suspension assembly, and a vehicle. Background Art

[0002] With the development of vehicle electrification, passengers' requirements for vehicle ride comfort are constantly increasing, and electromagnetic active suspensions have received extensive attention. At present, the vast majority of electromagnetic active suspension actuators adopt a combination of a rotary motor and a mechanical structure. In this combination form, through the mechanical structure, the rotary motion output by the rotary motor is converted into a linear motion acting on the vehicle body. However, this layout form will reduce the efficiency of the actuator and make the structure complex and inconvenient to install due to the addition of the mechanical structure. Therefore, the active suspension system gradually adopts a suspension motor as its actuator. The suspension motor actuator cannot provide effective support for the vehicle body. Summary of the Utility Model

[0003] Embodiments of this application provide a suspension motor actuator, a suspension assembly, and a vehicle that can provide effective support.

[0004] To achieve the above object, according to the first aspect of this application, a suspension motor actuator is provided. The suspension motor actuator includes:

[0005] A housing assembly;

[0006] A mover assembly, partially located within the housing assembly, and the mover assembly can undergo variable relative displacement relative to the housing assembly; and

[0007] An elastic support assembly, located within the housing assembly, with one end of the elastic support assembly abutting against the housing assembly and the other end abutting against the mover assembly.

[0008] In some embodiments of this application, the suspension motor actuator further includes a stator assembly fixed within the housing assembly; the housing assembly includes:

[0009] A housing;

[0010] A central rod, disposed on the housing, the stator assembly is disposed around the central rod and fixed to the housing, the mover assembly is disposed around the central rod and is located between the stator assembly and the central rod; and

[0011] A motor end cover, fixed to the housing, with a part of the mover assembly received within the housing assembly and another part extending out of the housing assembly from the motor end cover.

[0012] In some embodiments of this application, the elastic support assembly includes a first elastic member, and the first elastic member is located within the housing assembly.

[0013] In some embodiments of the present application, there is a first space between the housing, the stator assembly, the rotor 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 rotor assembly.

[0014] In some embodiments of the present application, there is a second space between the housing, the rotor assembly, and the motor end cover. The elastic support assembly further includes a second elastic member. The second elastic member is located in the second space. One end of the second elastic member abuts against the motor end cover, and the other end of the second elastic member abuts against the rotor assembly.

[0015] In some embodiments of the present application, there is a third space between the central rod and the rotor assembly. The elastic support assembly further includes a third elastic member. The third elastic member is located in the third space. One end of the third elastic member abuts against the rotor assembly, and the other end of the third elastic member abuts against the central rod.

[0016] In some embodiments of the present application, the first elastic member is an elastic member with a constant stiffness.

[0017] In some embodiments of the present application, the first elastic member is an elastic member with a constant diameter or a variable diameter.

[0018] In some embodiments of the present application, the second elastic member is an elastic member with a constant stiffness or a variable stiffness.

[0019] In some embodiments of the present application, the second elastic member is an elastic member with a constant diameter or a variable diameter.

[0020] In some embodiments of the present application, the third elastic member is an elastic member with a constant stiffness or a variable stiffness.

[0021] In some embodiments of the present application, the third elastic member is an elastic member with a variable diameter or a variable diameter.

[0022] In some embodiments of the present application, the rotor assembly includes:

[0023] A support assembly, which is located in the housing assembly and is disposed around the central rod; one end of the sliding shaft section away from the central rod extends out of the housing assembly from the motor end cover; and

[0024] A coil assembly, which is fixed in the support assembly and is located between the support assembly and the stator assembly.

[0025] In some embodiments of the present application, the support assembly includes: a first bracket, located within the housing assembly and disposed around the central rod, at least a portion of the first bracket being disposed between the stator assembly and the central rod, at least a portion of the central rod being received within the first bracket and capable of undergoing variable relative displacement along the axial direction of the stator assembly within the first bracket.

[0026] In some embodiments of the present application, the support assembly further includes: a second bracket, connected to an end of the first bracket away from the first elastic member, there being a third space between the second bracket, the first bracket, and the central rod;

[0027] Wherein, there is an accommodation space between the first bracket and the second bracket, and the coil assembly is fixed within the accommodation space.

[0028] In some embodiments of the present application, the motor end cover is fixedly connected to one end of the housing; one end of the second bracket away from the first bracket extends out of the motor end cover;

[0029] Wherein, there is a second space between the housing, the motor end cover, and the second bracket.

[0030] In some embodiments of the present application, the first bracket includes:

[0031] A coil mounting shaft section, disposed around the central rod, the coil assembly being disposed on the coil mounting shaft section; and

[0032] A flange portion, fixedly connected to one end of the coil mounting shaft section;

[0033] Wherein, one end of the flange portion away from the coil mounting shaft section is in sliding fit with the stator assembly, and one end of the coil mounting shaft section away from the flange portion is connected to the second bracket.

[0034] In some embodiments of the present application, the second bracket includes:

[0035] A limiting portion, having a first groove; one end of the coil mounting shaft section away from the flange portion is located within the first groove and is detachably connected to the inner wall of the first groove;

[0036] A sliding shaft section, fixedly connected to an end of the limiting portion away from the coil mounting shaft section; and

[0037] A first convex portion, disposed on the outer wall of the limiting portion facing away from the first groove;

[0038] Wherein, one end of the coil assembly away from the first elastic member abuts against the limiting portion, one end of the first convex portion away from the limiting portion is in sliding fit with the stator assembly, and one end of the sliding shaft section away from the limiting portion extends from within the motor end cover to outside the motor end cover and is configured to connect to the wheel end load of the vehicle.

[0039] In some embodiments of the present application, the second bracket further includes:

[0040] A limiting part fixing shaft, located in the first groove and fixed at the bottom of the first groove; the limiting part fixing shaft extends along the axial direction of the stator assembly; and

[0041] A buffer member, provided on the limiting part fixing shaft;

[0042] Wherein, the central rod has a buffer hole, and the buffer hole is opposite to the position of the limiting part fixing shaft; in the radial direction perpendicular to the axial direction of the stator assembly, the size of the buffer hole is larger than the size of the limiting part fixing shaft.

[0043] In some embodiments of the present application, the motor end cover includes:

[0044] A main body part, having a third receiving cavity, a fourth receiving cavity and a fifth receiving cavity; the third receiving cavity is respectively communicated with the third space and the fourth receiving cavity, and the fifth receiving cavity is communicated with the fourth receiving cavity; and

[0045] A second convex part, provided on the outer wall of the main body part facing away from the third receiving cavity;

[0046] Wherein, one end of the stator assembly away from the first elastic member abuts against the main body part, one end of the housing away from the first elastic member is detachably connected to the second convex part, part of the second elastic member is received in the third receiving cavity and the fourth receiving cavity, and one end of the sliding shaft section extends out of the motor end cover from the fifth receiving cavity.

[0047] In some embodiments of the present application, the housing assembly further includes:

[0048] A connecting shaft section, fixed on the side of the housing facing away from the central rod and configured to connect to the vehicle body.

[0049] In some embodiments of the present application, the housing includes a side wall and a bottom wall, the side wall is fixedly connected to one side of the bottom wall and extends along the axial direction of the stator assembly; and

[0050] The central rod and the connecting shaft section are arranged on both sides of the bottom wall in the axial direction of the stator assembly;

[0051] Wherein, the side wall has a stepped portion, and the stator assembly is fixed on the stepped portion.

[0052] In some embodiments of the present application, the stator assembly includes:

[0053] A permanent magnet assembly, fixed in the housing;

[0054] Wherein, one end of the permanent magnet assembly abuts against the housing, and the other end abuts against the motor end cover.

[0055] In some embodiments of the present application, the permanent magnet assembly includes axially magnetized permanent magnet elements and / or radially magnetized permanent magnet elements, and the axially magnetized permanent magnet elements and / or radially magnetized permanent magnet elements are arranged axially in the stator assembly.

[0056] In some embodiments of the present application, the stator assembly further includes:

[0057] a sleeve, disposed between the permanent magnet assembly and the mover assembly;

[0058] wherein, the permanent magnet assembly is disposed around the sleeve and between the housing and the sleeve, one end of the sleeve abuts against the housing, the other end abuts against the motor end cover, and the end of the mover assembly facing away from the central rod is slidably engaged with the sleeve respectively.

[0059] In a second aspect of the present application, a suspension assembly is further provided, and the suspension assembly includes the suspension motor actuator as described above.

[0060] In a third aspect of the present application, a vehicle is further provided, and the vehicle includes the suspension assembly as described above.

[0061] The suspension motor actuator, suspension assembly and vehicle provided by the present application, the suspension motor actuator includes a housing assembly, a stator assembly and an elastic support assembly, the stator assembly is fixed in the housing assembly, a part of the mover assembly is disposed in the housing, the mover assembly can have variable relative displacement relative to the stator assembly and the housing assembly, and one end of the elastic support assembly abuts against the housing assembly, and the other end abuts against the mover assembly. When the mover assembly moves relative to the housing assembly and the stator assembly, the elastic support assembly can provide effective support for the vehicle body.

[0062] Other features and advantages of the present application will be described in detail in the subsequent specific implementation part. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings without creative efforts based on these drawings.

[0064] In order to more fully understand the present application and its beneficial effects, the following description will be made in conjunction with the drawings, in which the same reference numerals represent the same parts in the following description.

[0065] Figure 1 A three-dimensional schematic diagram of a suspension assembly provided for some exemplary embodiments of the present application.

[0066] Figure 2 The Figure 1 side view of the suspension assembly shown.

[0067] Figure 3 is the Figure 2 cross-sectional view of the cross-section A-A along.

[0068] Figure 4 is the Figure 3 cross-sectional view of the housing assembly of the magnetic levitation motor actuator shown.

[0069] Figure 5 is the Figure 3 cross-sectional view of the rotor assembly and the stator assembly of the magnetic levitation motor actuator shown.

[0070] Figure 6 is the Figure 5 cross-sectional view of the first bracket of the rotor assembly shown.

[0071] Figure 7 is the Figure 6 three-dimensional schematic diagram of the first bracket shown.

[0072] Figure 8 is the Figure 5 cross-sectional view of the second bracket of the rotor assembly shown.

[0073] Figure 9 is the Figure 8 three-dimensional schematic diagram of the second bracket shown.

[0074] Figure 10 is the Figure 3 cross-sectional view of the motor end cover shown.

[0075] Figure 11 is the Figure 10 three-dimensional schematic diagram of the motor end cover shown.

[0076] Figure 12 cross-sectional view of the suspension assembly provided for some other exemplary embodiments.

[0077] Figure 13 cross-sectional view of the suspension assembly provided for still some other exemplary embodiments.

[0078] Figure 14 cross-sectional view of the suspension assembly provided for yet some other exemplary embodiments.

[0079] Figure 15 is the module schematic diagram of the vehicle provided by the exemplary embodiments of the present application.

[0080] Explanation of reference numerals:

[0081] 1000, Vehicle; 100 / 200 / 300, Suspension assembly; 110, Levitation motor actuator; 120, Wheel connection member; 400, Vehicle body; 500, Wheel-end load;

[0082] 10, Housing assembly; 11, Housing; 111, Bottom wall; 112, Side wall; 113, Step portion; 12, Central rod; 121, Buffer hole; 13, First receiving cavity; 14, Connecting shaft section; 15, Connecting boss; L1, First space; 501, Second space; L2, Third space; 16, Motor end cover

[0083] 20, Rotor assembly; 21, Coil assembly; 22, Support assembly; 221, First bracket; 2211, Coil mounting shaft section; 2212, Flange portion; 2213, Connection end; 222, Second bracket; 231, Limiting portion; 232, First convex portion; 233, First groove; 234, Limiting portion fixing shaft; 235, Second groove; 236, Sliding shaft section; 24, Second receiving cavity; 25, Accommodating space; 26, Buffer member;

[0084] 30, Stator assembly; 31, Permanent magnet assembly; 311, Axially magnetized permanent magnet element; 312, Radially magnetized permanent magnet element; 32, Sleeve;

[0085] 41, Main body portion; 42, Second convex portion; 43, Third receiving cavity; 44, Fourth receiving cavity; 45, Fifth receiving cavity; 46, Boss; 47, Buffer body; 401, Stopper feature;

[0086] 50, Elastic support assembly; 51, First elastic member; 52, Second elastic member; 53, Third elastic member. Detailed implementation manners

[0087] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present application.

[0088] Please refer to Figures 1 to 12, some exemplary embodiments of the present application provide a suspension motor actuator 110, which includes a housing assembly 10, a rotor assembly 20, a stator assembly 30, and an elastic support assembly 50. The rotor assembly 20, the stator assembly 30, and the elastic support assembly 50 are all disposed within the housing assembly 10. A part of the rotor assembly 20 is located within the housing assembly 10 and can undergo variable relative displacement along the axial direction Z of the stator assembly 30 relative to 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 rotor assembly 20. When the rotor assembly moves relative to the housing assembly 10 and the stator assembly 30, the elastic support assembly 50 can provide effective support to the vehicle body.

[0089] Please refer to again Figure 3 , the housing assembly 10 includes a housing 11, a motor end cover 16, and a central rod 12. The central rod 12 is disposed on the housing 11, and the motor end cover 16 is fixed to one end of the housing 11. There is a first receiving cavity 13 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 rotor assembly 20 is disposed around the central rod 12 and located between the stator assembly 30 and the central rod 12. The rotor assembly 20 can undergo variable relative displacement relative to the stator assembly 30 and the central rod 12.

[0090] In this embodiment, the first elastic member 51 is located within the housing assembly 10.

[0091] In this embodiment, the elastic support assembly 50 further includes a second elastic member 52 disposed around the rotor assembly 20. The first elastic member 51 is disposed around the central rod 12. There is a first space L1 between the housing 11, the stator assembly 30, the rotor assembly 20, and the central rod 12. There is a second space 501 between the housing 11, the rotor assembly 20, and the motor end cover 16. The first elastic member 51 is located within the first space L1, and the second elastic member 52 is located within the second space 501.

[0092] As the rotor assembly 20 moves in the axial direction Z of the stator assembly 30, the axial height and volume of both the first space L1 and the second space 501 change accordingly, and the axial height of the first elastic member 51 and the second elastic member 52 also changes accordingly.

[0093] Wherein, both ends of the first elastic member 51 abut against the housing 11 and the rotor assembly 20 respectively, and the second elastic member 52 abuts against the rotor assembly 20 and the motor end cover 16 respectively. The first elastic member 51 and the second elastic member 52 are always in a compressed state.

[0094] Among them, limited by the maximum inner diameter of the housing 11 and the maximum axial height of the first space L1, a first elastic member 51 (main elastic member) may not be sufficient to provide sufficient support. Therefore, a second elastic member 52 (auxiliary elastic member) is arranged in the second space 501. The first elastic member 51 and the second elastic member 52 can jointly provide support, which can not only provide effective support, but also help control the maximum radial size and maximum axial size of the suspension motor actuator assembly within a reasonable range under the premise of ensuring the effective stroke of the suspension motor mover. In addition, the addition of the second elastic member 52 can also make the relevant dimensional parameters of the first elastic member 51 can be further compressed to provide better layout.

[0095] Since the volume of the first space L1 is greater than that of the second space 501 , the radial dimension of the first elastic member 51 is greater than that of the second elastic member 52 .

[0096] It has been verified that the elastic member is placed externally, for example, on the connecting shaft section 14 of the housing, the elastic member needs to abut against the bottom wall of the housing and the length of the elastic member cannot be higher than the thread of the connecting shaft section 14. In order to achieve better support, the length of the connecting shaft section 14 and the radial width of the bottom wall of the housing will increase, which will increase the maximum axial dimension and the maximum radial dimension of the suspension motor actuator assembly. The built-in elastic support component 50 (the first elastic member 51 and the second elastic member 52) does not require additional increase in the size of the housing to ensure the support of the elastic member to the vehicle body. The built-in elastic support component 50 does not additionally increase the radial dimension and the axial dimension of the suspension motor actuator. 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.

[0097] Under the same conditions of other factors (such as supporting load and stiffness), the mean diameter of the coil spring is inversely correlated with the compressed height of the coil spring (when the actuator is at zero stroke). The zero stroke of the suspension motor actuator refers to the position of the first elastic member 51 and the second elastic member 52 when the actuator is not working.

[0098] In some embodiments of the present application, the first elastic member 51 and the second elastic member 52 are both constant stiffness elastic members. Specifically, the first elastic member 51 and the second elastic member 52 are both constant stiffness helical springs.

[0099] In some embodiments of the present application, the first elastic member 51 is a constant stiffness elastic member or a variable stiffness elastic member, and the second elastic member 52 is a constant stiffness elastic member or a variable stiffness elastic member.

[0100] In some embodiments of the present application, the first elastic member 51 is a variable diameter elastic member or a constant diameter elastic member, and the second elastic member 52 is a variable diameter elastic member or a constant diameter elastic member.

[0101] See also Figure 3 In this embodiment, the first elastic member 51 is an elastic member with a variable diameter and a constant stiffness, and the second elastic member 52 is an elastic member with a constant diameter and a constant stiffness.

[0102] Since the connection between the center rod 12 and the housing 11 has stress, an arc-shaped transition surface feature is designed at the connection between the center rod 12 and the housing 11. In order to take into account the arc-shaped transition surface feature, the outer diameter of the end of the first elastic member 51 close to the movable subassembly 20 is smaller than the outer diameter of the end of the first elastic member 51 away from the movable subassembly 20. In this embodiment, the outer diameter of the first elastic member 51 gradually decreases in the direction from the end of the first elastic member 51 away from the movable subassembly 20 to the end of the first elastic member 51 close to the movable subassembly 20.

[0103] Specifically, see Figure 12 In some embodiments of the present application, the first elastic member 51 is a constant diameter variable stiffness elastic member, and the second elastic member 52 is a constant diameter constant stiffness elastic member. That is, the outer diameter of the end of the first elastic member 51 close to the movable subassembly 20 is equal to the outer diameter of the end of the first elastic member 51 away from the movable subassembly 20.

[0104] The two ends of the first elastic member 51 are respectively in contact with the housing 11 and the movable subassembly 20. The first elastic member 51 is always in a compressed state.

[0105] Please refer 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 step portion 113 , and the stator assembly 30 is fixed on the step portion 113 .

[0106] Among them, the center rod 12 has a buffer hole 121 extending along the axial direction Z of the stator assembly 30. When the movable assembly 20 moves along the axial direction Z of the stator assembly 30 toward the center rod 12 and when the movable 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 movable assembly 20.

[0107] The housing assembly 10 further includes a connecting shaft section 14 , which is fixed to a side of the bottom wall 111 away from the central rod 12 and is configured to be connected to a vehicle body 400 .

[0108] In some embodiments, the connecting shaft section 14 is threadedly connected to the vehicle body 400 .

[0109] The housing assembly 10 further includes a connecting boss 15 , which is configured to be connected to the motor end cover 16 and is disposed on the outer peripheral wall of one end of the side wall 112 away from the bottom wall 111 .

[0110] Please refer to 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 is 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 disposed around the central rod 12. At least a portion of the support assembly 22 is 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, and the support assembly 22 is capable of undergoing variable relative displacement within the first receiving cavity 13 along the axial direction Z of the stator assembly 30.

[0111] Among them, the coil assembly 21 is regarded as the mover. After an alternating current is passed through the coil assembly 21, a changing excitation magnetic field is generated in the coil assembly 21. This changing excitation magnetic field interacts with the permanent constant magnetic field generated by the stator assembly 30 to generate a traveling wave magnetic field and a thrust force. Under the action of this thrust force, the mover assembly 20 can generate a reciprocating linear motion along the axial direction Z of the stator assembly 30. The mover assembly 20 mainly drives the wheel-end load of the vehicle, thereby transmitting the motion of the wheel to the mover assembly 20. The wheel-end load includes, but is not limited to: wheels, part of the braking system, the lower suspension mass block, etc. By actively controlling the dynamic state of the wheel end, and then controlling the attitude of the entire vehicle to achieve the expected goal, and then realizing the full-active real-time adjustment of the suspension, with fast response time, large thrust, high speed, and high response frequency, during the vehicle driving process, it can significantly improve the driving experience of the passengers in the vehicle.

[0112] Among them, the coil assembly 21 may include an iron core, a three-phase wire coil, an insulating member, etc., which will not be elaborated here one by one.

[0113] Among them, the support assembly 22 is used to protect and limit the coil assembly 21, and drives the wheel-end load of the vehicle. The support assembly 22 moves reciprocally linearly along the axial direction Z of the stator assembly 30 along with the coil assembly 21.

[0114] Please refer to 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, and at least a portion of the central rod 12 is received within the second receiving cavity 24 and is capable of undergoing 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 one end of the first bracket 221 away from the first elastic member 51. The second bracket 222 covers one end of the second receiving cavity 24 away from the first elastic member 51, and the other end of the second bracket 222 protrudes from the housing 11. There is an accommodation space 25 between the first bracket 221 and the second bracket 222, and the coil assembly 21 is fixed within the accommodation space 25. The first bracket 221 and the second bracket 222 cooperate to prevent the coil assembly 21 from loosening during movement.

[0115] Wherein, a third space L2 is formed among the first bracket 221, the second bracket 222 and the central rod 12. The third space L2 is a 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.

[0116] Please refer to again Figure 6 、 Figure 7 and Figure 3 , the first bracket 221 includes a coil mounting shaft section 2211, a flange portion 2212 and a connection end 2213. The flange portion 2212 and the connection end 2213 are respectively located at both ends of the coil mounting shaft section 2211 in the axial direction Z of the stator assembly 30. The coil mounting shaft section 2211 is disposed around the central rod 12, and the coil assembly 21 is provided on the coil mounting shaft section 2211. The flange portion 2212 is fixedly connected to one end of the coil mounting shaft section 2211. One end of the flange portion 2212 away from the coil mounting shaft section 2211 is in sliding fit with the stator assembly 30, and the connection end 2213 is connected to the second bracket 222.

[0117] Please refer to again Figure 8 、 Figure 9 and Figure 3, the second bracket 222 includes a limiting portion 231, a sliding shaft section 236, and a first convex portion 232. The limiting portion 231 has a first groove 233. One end of the coil mounting shaft section 2211 away from the flange portion 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 portion 231 away from the coil mounting shaft section 2211; the first convex portion 232 is provided on the outer wall of the limiting portion 231 facing away from the first groove 233. One end of the coil assembly 21 away from the first elastic member 51 abuts against the limiting portion 231. One end of the first convex portion 232 away from the limiting portion 231 is in sliding fit with the stator assembly 30. One end of the sliding shaft section 236 away from the limiting portion 231 extends from inside the motor end cover 16 to outside the motor end cover 16 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 16 can maintain a sliding fit with a low friction coefficient.

[0118] Wherein, the second bracket 222 further includes a limiting portion fixing shaft 234, which is located in the first groove 233 and fixed to the bottom of the first groove 233; the limiting portion fixing shaft 234 extends along the axial direction Z of the stator assembly 30. The limiting portion fixing shaft 234 is disposed opposite to the position of the buffer hole 121. In the radial direction X perpendicular to the axial direction Z of the stator assembly 30, the size of the buffer hole 121 is larger than the size of 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 when the mover assembly is about to contact the end of the center rod 12 away from the bottom wall 111, a part of the limiting portion fixing shaft 234 can be inserted into the buffer hole 121 to buffer the mover assembly 20.

[0119] In some embodiments, the mover assembly 20 further includes a buffer member 26, which is provided 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 when 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 member 26 contacts the end of the center rod 12 away from the bottom wall 111 to further buffer the mover assembly 20.

[0120] In some embodiments, the bottom of the limiting portion 231 further has a second groove 235, which communicates with the first groove 233. Compared with the second groove 235, the first groove 233 is closer to the coil assembly 21. The connecting end 2213 of the first bracket 221 is received in the first groove 233, the buffer member 26 is received in the first groove 233 and the second groove 235, and the size of the second groove 235 is slightly larger than the size of the buffer member 26.

[0121] Please refer to again Figure 5, the stator assembly 30 includes a permanent magnet assembly 31, and the permanent magnet assembly 31 is fixed on the step 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 16.

[0122] In some embodiments of the present 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 in the axial direction Z of the stator assembly 30 to the required height. The permanent magnet assembly 31 serves as a stator to provide a permanent and constant magnetic field.

[0123] 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.

[0124] In some embodiments of the present application, the permanent magnet assembly 31 is bonded to the inner side of the housing 11 by means of gluing on the outer peripheral surface.

[0125] In some embodiments of the present application, the stator assembly 30 further includes a sleeve 32. The sleeve 32 is disposed between the permanent magnet assembly 31 and the rotor assembly 20, is received on the step portion 113, and is disposed around the rotor assembly 20. Among them, the permanent magnet assembly 31 is disposed around the sleeve 32 and is located between the housing 11 and the sleeve 32. One end of the sleeve 32 abuts against the step portion 113, and the other end abuts against the motor end cover 16. The ends of the coil assembly 21 and the support assembly 22 facing away from the central rod 12 are respectively in sliding fit with the sleeve 32.

[0126] Among them, 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 in the axial direction Z of the stator assembly 30.

[0127] In some embodiments of the present application, the sleeve 32 is bonded to the inner peripheral surface of the permanent magnet assembly 31 by means of gluing on the outer peripheral surface.

[0128] In some embodiments of the present application, the sleeve 32 is in a cylindrical shape or the like.

[0129] Among them, the sleeve 32 is disposed on the outer wall (outer peripheral surface) side of the permanent magnet assembly 31. The permanent magnet assembly 31 is restricted between the sleeve 32, the side wall 112 of the housing 11, and the motor end cover 16. The movable space of the permanent magnet assembly 31 is effectively restricted, the risk of the permanent magnet assembly 31 falling off can be reduced, and further the stability and reliability of the constant magnetic field generated by the permanent magnet assembly 31 can be ensured.

[0130] Compared with placing the mover assembly outside the outer periphery of the stator assembly (i.e., the stator assembly is externally placed and the mover assembly is internally placed), in the present application, placing the stator assembly 30 outside the outer periphery of the mover assembly 20 (i.e., the stator assembly 30 is externally placed and the mover assembly 20 is internally placed) can obtain a larger air-gap diameter under the constraint of a limited space (the first receiving cavity 13), thereby being able to provide a larger active thrust. The air gap here 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.

[0131] Please refer to again Figure 3 and Figure 5 In some embodiments, the motor end cover 16 is fixedly connected to one end of the housing 11 away from the first elastic member 51; one end of the second bracket 222 away from the first bracket 221 (the sliding shaft section 236) extends out from the motor end cover 16; there is a second space 501 between the housing 11, the motor end cover 16 and the second bracket 222, and the second bracket 222 can also undergo 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 will also change accordingly.

[0132] Please refer to again Figure 10 and Figure 11 The motor end cover 16 includes a main body portion 41 and a second convex portion 42, and the second convex portion 42 is provided on the outer peripheral wall of one end of the main body portion 41 close to the housing 11.

[0133] Among them, the main body portion 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 respectively communicated with the second space 501 and the fourth receiving cavity 44, and the fifth receiving cavity 45 is communicated with the fourth receiving cavity 44; in the radial direction perpendicular to the axial direction Z of the stator assembly 30, the dimension of the third receiving cavity 43 is larger than that of the fourth receiving cavity 44, and the dimension of the fourth receiving cavity 44 is larger than that of the fifth receiving cavity 45. One end of the stator assembly 30 away from the first elastic member 51 abuts against the main body portion 41, and one end of the housing 11 away from the first elastic member 51 is detachably connected to the second convex portion 42.

[0134] Among them, the radial dimension of the third receiving cavity 43 is slightly larger than the maximum radial dimension of the second bracket 222 of the mover assembly 20 to accommodate the first convex portion 232 of the mover assembly 20, and the radial dimension of the fourth receiving cavity 44 is slightly larger than the radial dimension of the limiting portion 231 of the mover assembly 20.

[0135] In this embodiment, the second convex portion 42 is provided on the outer wall of the main body portion 41 facing away from the third receiving cavity 43. A rabbet feature 401 is formed between the second convex portion 42 and the main body portion 41 to ensure the coaxiality of the installation of the motor end cover 16 and the housing 11. The motor end cover 16 limits the axial installation position of the stator assembly 30 inside the housing 11 through the upper end surface of the rabbet feature 401, reducing the risk of the stator assembly 30 falling off.

[0136] In this embodiment, the second convex portion 42 is detachably and fixedly connected to the connecting boss 15 of the housing 11, such as by screw connection or the like.

[0137] Please refer to again Figure 3 and Figure 10 The motor end cover 16 further 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 axially on the stator assembly 30 and the bottom wall of the limiting portion 231 of the mover assembly 20 is about to contact the bottom wall of the fourth receiving cavity 44 of the motor end cover 16, the buffer body 47 plays a buffering role on the limiting portion 231 of the mover assembly 20.

[0138] In other embodiments, buffer bodies can 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 bracket 221 of the mover assembly 20.

[0139] Please refer to again Figure 3 and Figure 12 In the second aspect of the present application, a suspension assembly 100 is further provided. The suspension assembly 100 includes the suspension motor actuator 110 as described above.

[0140] In some embodiments of the present application, the suspension assembly 100 further includes a wheel connecting member 120. The sliding shaft section 236 of the mover assembly 20 of the housing 11 of the suspension motor actuator 110 is connected to the wheel connecting member 120, and the wheel connecting member 120 is configured to connect the wheel end load of the vehicle.

[0141] Please refer to Figure 13 The present application further provides a suspension assembly 200. The structure of the suspension motor actuator of the suspension assembly 200 is basically the same as that of the suspension motor actuator 110 of the suspension assembly 100, except that: the suspension motor actuator of the suspension assembly 200 further includes a third elastic member 53, and the third elastic member 53 is located in the third space L2. One end of the third elastic member 53 abuts against the central rod 12, and the other end abuts against the support assembly 22 of the mover assembly 20.

[0142] In this embodiment, the third elastic member 53 is located in the third space L2. The first elastic member 51 and the third elastic member 53, or the first elastic member 51, the second elastic member 52, and the third elastic member 53 can jointly provide a supporting effect. This can not only provide effective support, but also, on the premise of ensuring the effective stroke of the floating motor mover, help control the maximum radial dimension and the maximum axial dimension of the floating motor actuator assembly within a reasonable range. In addition, locating the third elastic member 53 in the third space L2 can also prevent the central rod 12 from colliding with the support assembly 22 of the mover assembly 20.

[0143] Please refer to Figure 14 , this application also provides a suspension assembly 300. The structure of the floating motor actuator of the suspension assembly 300 is basically the same as that of the floating motor actuator 110 of the suspension assembly 100. The difference is that the floating motor actuator of the suspension assembly 300 does not include the second elastic member 52. That is to say, the floating motor actuator of the suspension assembly 300 only includes the first elastic member 51.

[0144] In this embodiment, the floating motor actuator of the suspension assembly 300 only includes the first elastic member 51. When the mover assembly moves relative to the housing assembly 10 and the stator assembly 30, the first elastic member 51 can also provide a certain support to the vehicle body and, on the premise of ensuring the effective stroke of the floating motor mover, help control the maximum radial dimension and the maximum axial dimension of the floating motor actuator assembly within a reasonable range.

[0145] Please refer to Figure 15 , the third aspect of this application also provides a vehicle 1000. The vehicle 1000 includes the suspension assembly 100 / 200 / 300, the vehicle body 400, and the wheel end load 500 as described above. The vehicle body 400 is connected to the connecting shaft section 14 of the housing of the suspension assembly 100 / 200 / 300, and the wheel end load 500 is connected to the wheel connecting member 120 of the suspension assembly 100 / 200 / 300.

[0146] The suspension motor actuator, suspension assembly and vehicle provided by the present application, the suspension motor actuator includes a housing assembly, including a housing and a central rod, the central rod is arranged on the housing; a stator assembly, arranged around the central rod and fixed on the housing; a rotor assembly, arranged around the central rod and located between the stator assembly and the central rod, the rotor assembly can have a variable relative displacement relative to the stator assembly and the central rod; a motor end cover, fixed on the housing; and an elastic support assembly, including a first elastic member arranged around the central rod and a second elastic member arranged around the rotor assembly; there is a first space between the housing, the stator assembly, the rotor assembly and the central rod, and there is a second space between the housing, the rotor assembly and the motor end cover, the first elastic member is located in the first space, and the second elastic member is located in the second space. By respectively arranging the first elastic member and the second elastic member in the first space and the second space of the suspension motor actuator, the first elastic member and the second elastic member can jointly provide a supporting effect, which can not only provide effective support, but also help to control the maximum radial dimension and the maximum axial dimension of the suspension motor actuator assembly within a reasonable range on the premise of ensuring the effective stroke of the suspension motor rotor.

[0147] In addition, the addition of the second elastic member can also further compress the relevant dimensional parameters of the first elastic member to provide better layoutability.

[0148] In addition, compared with the solution of placing the rotor assembly outside and the stator assembly inside, the present application places the stator assembly outside and the rotor assembly inside, which can obtain a larger air gap diameter under the constraint of limited space, so as to provide a greater active thrust.

[0149] In addition, the coil assembly of the suspension motor actuator in the present application is used as the rotor. After an alternating current is passed through the coil assembly, a changing excitation magnetic field is generated in the coil assembly. The changing excitation magnetic field interacts with the permanent constant magnetic field generated by the stator assembly to generate a traveling wave magnetic field and generate a thrust. Under the action of this thrust, the rotor assembly can generate a reciprocating linear motion along the axial direction of the stator assembly. The rotor assembly mainly drives the wheel end load of the vehicle, so as to transfer the movement of the wheel to the rotor assembly. By actively controlling the dynamic state of the wheel end, and then controlling the attitude of the whole vehicle to reach the expected goal, and then realizing the full active real-time adjustment of the suspension, with fast response time, large thrust, high speed and high response frequency, which can significantly improve the driving experience of the passengers in the vehicle during the driving process.

[0150] In the description of the present application, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of the present application, the meaning of "a plurality" is two or more, unless otherwise specifically defined.

[0151] In the above embodiments, the descriptions of the respective embodiments have their own focuses. For parts not detailed in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

[0152] Among the embodiments, implementation manners and related technical features of the present application, they can be combined and replaced with each other without conflict.

[0153] The above are only the preferred embodiments of the present application and do not impose any form of limitation on the present application. Although the descriptions of the respective embodiments of the present application have their own focuses and for parts not detailed in a certain embodiment, reference may be made to the relevant embodiments of other embodiments, any modification, equivalent change and modification made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application still fall within the scope of the technical solution of the present application.

Claims

1. A suspension motor actuator, characterized in that: include: Shell assembly; A mover assembly, partly located in the housing assembly, the mover assembly being capable of variable relative displacement relative to the housing assembly; and The elastic support component is located in the housing component; one end of the elastic support component abuts against the housing component, and the other end abuts against the mover component.

2. The suspension motor actuator according to claim 1, characterized in that: The suspension motor actuator also includes a stator assembly fixed in the housing assembly; The housing assembly comprises: case; A center rod is arranged on the housing, the stator assembly is arranged around the center rod and fixed on the housing, and the mover assembly is arranged around the center rod and located between the stator assembly and the center rod; and The motor end cover is fixed on the housing, a part of the mover assembly is accommodated in the housing assembly, and another part extends out of the housing assembly from the motor end cover.

3. The suspension motor actuator according to claim 2, characterized in that: The elastic support assembly includes a first elastic member, and the first elastic member is located in the housing assembly.

4. The suspension motor actuator according to claim 3, characterized in that: A first space is defined between the housing, the stator assembly, the mover assembly, and the center rod. A first elastic member is located in the first space and is disposed around the center 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.

5. The suspension motor actuator according to claim 3, characterized in that: A second space is provided between the housing, the mover assembly and the motor end cover; Wherein, the elastic support assembly further includes a second elastic member, the second elastic member is located in the second space, one end of the second elastic member abuts against the motor end cover, and the other end of the second elastic member abuts against the mover assembly.

6. The suspension motor actuator according to claim 3, characterized in that: A third space is provided between the central rod and the mover assembly; Wherein, the elastic support assembly further includes a third elastic member, the third elastic member is located in the third space, one end of the third elastic member abuts against the mover assembly, and the other end of the third elastic member abuts against the center rod.

7. The suspension motor actuator according to claim 3, characterized in that: The first elastic member is a constant stiffness elastic member.

8. The suspension motor actuator according to claim 7, characterized in that: The first elastic member is an elastic member of equal diameter or variable diameter.

9. The suspension motor actuator according to claim 5, characterized in that: The second elastic member is a variable stiffness or constant stiffness elastic member.

10. The suspension motor actuator according to claim 9, characterized in that: The second elastic member is an elastic member with a constant diameter or a variable diameter.

11. The suspension motor actuator according to claim 6, characterized in that: The third elastic member is a variable stiffness or constant stiffness elastic member.

12. The suspension motor actuator according to claim 11, characterized in that: The third elastic member is an elastic member of equal diameter or variable diameter.

13. The suspension motor actuator according to claim 5, characterized in that: The mover assembly comprises: A support assembly is located in the housing assembly and is arranged around the center rod; the support assembly includes a sliding shaft segment, and one end of the sliding shaft segment away from the center rod extends out of the housing assembly from the motor end cover; and The coil assembly is fixed in the support assembly and is located between the support assembly and the stator assembly.

14. The suspension motor actuator according to claim 13, characterized in that: The support assembly comprises: A first bracket is located in the housing assembly and is arranged around the center rod. The first bracket is at least partially arranged between the stator assembly and the center rod. At least a portion of the center rod is accommodated in the first bracket and can undergo variable relative displacement in the first bracket along the axial direction of the stator assembly.

15. The suspension motor actuator according to claim 14, characterized in that: The support assembly also includes: A second bracket is connected to an 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; There is an accommodating space between the first bracket and the second bracket, and the coil assembly is fixed in the accommodating space.

16. The suspension motor actuator according to claim 15, characterized in that: The motor end cover is fixedly connected to one end of the housing; one end of the second bracket away from the first bracket extends out from the motor end cover; Wherein, a second space is provided between the shell, the motor end cover and the second bracket.

17. The suspension motor actuator according to claim 15, characterized in that: The first bracket comprises: A coil installation shaft section is arranged around the central rod, and the coil assembly is arranged on the coil installation shaft section; and A flange portion, fixedly connected to one end of the coil mounting shaft section; The flange portion is slidably matched with the stator assembly, and one end of the coil mounting shaft segment away from the flange portion is connected to the second bracket.

18. The suspension motor actuator according to claim 17, characterized in that: The second bracket comprises: The limiting portion has a first groove; one end of the coil installation shaft section away from the flange portion is located in the first groove and is detachably connected to the inner wall of the first groove; The sliding shaft section is fixedly connected to an end of the limiting portion away from the coil mounting shaft section; and a first convex portion, arranged on an outer wall of the limiting portion away from the first groove; Among them, one end of the coil assembly away from the first elastic member abuts against the limiting portion, one end of the first protrusion away from the limiting portion slides in cooperation with the stator assembly, and one end of the sliding shaft segment away from the limiting portion extends from the inside of the motor end cover to the outside of the motor end cover and is configured to connect to the wheel end load of the vehicle.

19. The suspension motor actuator according to claim 18, characterized in that: The second bracket also includes: A stopper fixing shaft is located in the first groove and fixed at the bottom of the first groove; the stopper fixing shaft extends along the axial direction of the stator assembly; and A buffer member, arranged on the fixed shaft of the limiting portion; Wherein, the center rod is provided with a buffer hole, and the buffer hole is opposite to the fixed axis of the limiting portion; in a radial direction perpendicular to the axial direction of the stator assembly, the size of the buffer hole is larger than the size of the fixed axis of the limiting portion.

20. The suspension motor actuator according to claim 18, characterized in that: The motor end cover comprises: The main body has a third receiving chamber, a fourth receiving chamber and a fifth receiving chamber; the third receiving chamber and the fourth receiving chamber are communicated with each other, and the fifth receiving chamber is communicated with the fourth receiving chamber; and A second convex portion is arranged on an outer wall of the main body away from the third receiving cavity; Among them, one end of the stator assembly away from the first elastic member is in contact with the main body, one end of the shell away from the first elastic member is detachably connected to the second protrusion, part of the second elastic member is accommodated in the third accommodation cavity and the fourth accommodation cavity, and one end of the sliding shaft segment extends from the fifth accommodation cavity to the outside of the motor end cover.

21. The suspension motor actuator according to claim 2, characterized in that: The housing assembly further comprises: The connecting shaft section is fixed on a side of the housing away from the central rod and is configured to be connected to a body of a vehicle.

22. The suspension motor actuator according to claim 21, characterized in that: The housing comprises a side wall and a bottom wall, wherein the side wall is fixedly connected to one side of the bottom wall and extends along the axial direction of the stator assembly; and The central rod and the connecting shaft segment are arranged on both sides of the bottom wall in the axial direction of the stator assembly; Wherein, the side wall is provided with a step portion, and the stator assembly is fixed on the step portion.

23. The suspension motor actuator according to claim 2, characterized in that: The stator assembly comprises: A permanent magnet assembly is fixed in the housing; Wherein, one end of the permanent magnet assembly abuts against the shell, and the other end abuts against the motor end cover.

24. The suspension motor actuator according to claim 23, characterized in that: The permanent magnet assembly includes axially magnetized permanent magnet elements and / or radially magnetized permanent magnet elements, and the axially magnetized permanent magnet elements and / or the radially magnetized permanent magnet elements are arranged in the axial direction of the stator assembly.

25. The suspension motor actuator according to claim 23, characterized in that: The stator assembly further comprises: A sleeve, arranged between the permanent magnet assembly and the mover assembly; Wherein, the permanent magnet assembly is arranged around the sleeve and is located between the shell and the sleeve, one end of the sleeve abuts against the shell, and the other end abuts against the motor end cover, and the end of the mover assembly away from the center rod is slidably matched with the sleeve.

26. A suspension assembly, characterized in that: Comprising the suspension motor actuator according to any one of claims 1 to 25.

27. A vehicle, characterized in that: Comprising the suspension assembly as claimed in claim 26.

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