Suspension motor actuator, suspension assembly and vehicle

Abstract

The utility model relates to a suspension motor actuator, a suspension assembly and a vehicle, and the suspension motor actuator comprises a rotor assembly which comprises a coil assembly, and the coil assembly is provided with a first cavity; the stator assembly comprises a permanent magnet assembly, and a part of the permanent magnet assembly is accommodated in the first cavity; the rotor assembly further comprises a guide structure, the guide structure is fixedly connected to one end of the coil assembly, and the guide structure and the permanent magnet assembly are in sliding fit in the axial direction of the stator assembly. According to the suspension motor actuator, the suspension assembly and the vehicle provided by the invention, the technical problem that the magnetic bias force, the lateral force and the durability of the suspension motor actuator are reduced due to the non-uniform air gap between the permanent magnet assembly and the coil assembly can be relieved to a certain extent.

Description

Technical Field

[0001] The present 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 continuously increasing, and electromagnetic active suspensions have received extensive attention. At present, the vast majority of electromagnetic active suspension actuators adopt a form of 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 for installation due to the addition of the mechanical structure. Therefore, the active suspension system gradually adopts a suspension motor as its actuator.

[0003] When the vehicle is running, it is in a vibrating state, which may cause the central rod of the stator assembly in the suspension motor to tilt relative to the coil assembly in the suspension motor, resulting in uneven air gaps between the permanent magnet assembly and the coil assembly. The uneven air gaps between the permanent magnet assembly and the coil assembly will reduce the magnetic bias force, lateral force, and durability of the suspension motor actuator. Summary of the Utility Model

[0004] The embodiments of the present application provide a suspension motor actuator, a suspension assembly, and a vehicle, which to a certain extent alleviate the technical problems of the reduction of the magnetic bias force, lateral force, and durability of the suspension motor actuator caused by the uneven air gaps between the permanent magnet assembly and the coil assembly.

[0005] To achieve the above object, according to the first aspect of the present application, a suspension motor actuator is provided, including: a mover assembly, including a coil assembly, the coil assembly having a first cavity; and a stator assembly, including a permanent magnet assembly; a part of the permanent magnet assembly is received in the first cavity; the mover assembly further includes a guiding structure disposed around the permanent magnet assembly, the guiding structure is fixedly connected to one end of the coil assembly, and the guiding structure is in sliding fit with the permanent magnet assembly in the axial direction of the stator assembly.

[0006] In some embodiments of the present application, the guiding structure includes: a first sliding bearing disposed around the permanent magnet assembly; the first sliding bearing is fixedly connected to the coil assembly and is in sliding fit with the permanent magnet assembly.

[0007] In some embodiments of the present application, a second sliding bearing is disposed around the permanent magnet assembly and is fixedly connected to the mover assembly, the second sliding bearing is in sliding fit with the permanent magnet assembly; the second sliding bearing and the first sliding bearing are respectively located at both ends of the coil assembly in the axial direction of the stator assembly.

[0008] In some embodiments of the present application, the mover assembly further includes: a housing fixedly connected to the coil assembly; the housing has a second cavity, one end of the permanent magnet assembly is received in the second cavity, and the permanent magnet assembly can reciprocate along the axial direction of the stator assembly in the second cavity, and one of the first sliding bearing and the second sliding bearing is mounted on the housing, and the other of the first sliding bearing and the second sliding bearing is located at an end of the coil assembly away from the housing.

[0009] In some embodiments of the present application, the housing includes: an open end connected to the coil assembly, and the second cavity extends from the open end along the axial direction of the stator assembly into the interior of the housing; the open end has a mounting groove communicating with the second cavity, and one of the first sliding bearing and the second sliding bearing is mounted in the mounting groove.

[0010] In some embodiments of the present application, one of the first sliding bearing and the second sliding bearing is mounted in the mounting groove in an interference fit manner.

[0011] In some embodiments of the present application, the end face of the first sliding bearing or the second sliding bearing mounted in the mounting groove close to the coil assembly does not exceed the end face of the open end close to the coil assembly.

[0012] In some embodiments of the present application, the mover assembly further includes: a sliding bearing mount fixedly connected to the coil assembly; the other of the first sliding bearing and the second sliding bearing is mounted in the sliding bearing mount and abuts against the coil assembly.

[0013] In some embodiments of the present application, the housing further includes: a connection end disposed away from the coil assembly; the connection end is fixedly connected to the wheel end load of the vehicle through a wheel connection member.

[0014] In some embodiments of the present application, the stator assembly further includes: a sleeve disposed around one side of the permanent magnet assembly close to the coil assembly; wherein, a guiding structure is disposed around the sleeve, and the guiding structure is slidably engaged with the sleeve in the axial direction of the stator assembly.

[0015] In some embodiments of the present application, the two ends of the sleeve in the axial direction of the stator assembly are respectively aligned with the two ends of the permanent magnet assembly in the first direction.

[0016] In some embodiments of the present application, the stator assembly further includes: a center rod including a first connecting shaft section, a limiting portion and a mounting shaft section, the limiting portion is located between the first connecting shaft section and the mounting shaft section and protrudes radially from the first connecting shaft section and the mounting shaft section, and the first connecting shaft section is configured to connect the vehicle body; wherein, the permanent magnet assembly is mounted on the mounting shaft section of the center rod, and one end of the permanent magnet assembly abuts against the limiting portion.

[0017] In some embodiments of the present application, the coil assembly is located on the outer wall side of the sleeve away from the central rod and can reciprocate axially along the stator assembly relative to the sleeve; and / or the guiding structure is arranged on the outer side of the sleeve away from the central rod and is connected to one end of the limiting portion of the coil assembly close to the central rod, and the guiding structure is in sliding fit with the inner peripheral surface of the sleeve close to the outer peripheral surface of the sleeve away from the central rod.

[0018] In some embodiments of the present application, the central rod further includes a second connecting shaft section, which is located on the side of the mounting shaft section away from the limiting portion and is connected to the mounting shaft section; the stator assembly further includes: a first gasket, arranged around the mounting shaft section and located between one end of the permanent magnet assembly close to the limiting portion and the limiting portion; a fastener, arranged around the second connecting shaft section and connected to the second connecting shaft section; and a second gasket, arranged around the second connecting shaft section and located between one end of the permanent magnet assembly away from the limiting portion and the fastener.

[0019] In some embodiments of the present application, the suspension motor actuator further includes: an elastic member, arranged around the stator assembly protruding from the rotor assembly; one end of the elastic member is fixedly connected to the coil assembly, and the other end is configured to be connected to the vehicle body, and one of the first sliding bearing and the second sliding bearing is located between the elastic member and the sleeve.

[0020] In some embodiments of the present application, the elastic member has a first limit state, a second limit state and an intermediate state between the first limit state and the second limit state; the overlapping area of the elastic member and the coil assembly in the axial direction of the stator assembly remains unchanged.

[0021] In some embodiments of the present application, when the elastic member is in the first limit state, the elastic member is in a compressed state and has a maximum compression length, and the maximum compression length of the elastic member is greater than the maximum upward jump stroke of the suspension motor actuator.

[0022] 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 stacked in the axial direction of the stator assembly.

[0023] The second aspect of the present application further provides a suspension assembly, and the suspension assembly includes the suspension motor actuator as above.

[0024] In some embodiments of the present application, the suspension assembly further includes a wheel connecting member, the connecting end of the housing of the suspension motor actuator is connected to the wheel connecting member, and the wheel connecting member is configured to connect the wheel end load of the vehicle.

[0025] The third aspect of the present application further provides a vehicle, and the vehicle includes the suspension assembly as above.

[0026] In the suspension motor actuator, suspension assembly and vehicle according to the embodiments of the present application, a guiding structure is added in the rotor assembly of the suspension motor actuator and arranged around the stator assembly. The guiding structure is fixedly connected to one end of the coil assembly, and the guiding structure and the permanent magnet assembly are in sliding fit in the axial direction of the stator assembly. When the central rod of the stator assembly of the suspension motor actuator is inclined relative to the coil assembly of the suspension motor actuator, the permanent magnet assembly of the stator assembly will be driven to be inclined relative to the coil assembly. The guiding structure can support the central rod, so that the air gap between the permanent magnet assembly and the coil assembly is relatively uniform, thereby alleviating to a certain extent the technical problems of magnetic deviation force, lateral force and durability reduction of the suspension motor actuator caused by the uneven air gap between the permanent magnet assembly and the coil assembly.

[0027] Other features and advantages of the present application will be described in detail in the subsequent specific implementation section. Brief Description of the Drawings

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for description in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative efforts.

[0029] In order to more fully understand the present application and its beneficial effects, the following description will be made in conjunction with the drawings, where the same reference numerals in the following description represent the same parts.

[0030] Figure 1 is a three-dimensional structural schematic diagram of a suspension assembly in which an elastic member is in an intermediate state provided by an exemplary embodiment of the present application.

[0031] Figure 2 is Figure 1 a side view of the suspension assembly shown.

[0032] Figure 3 is along Figure 2 a cross-sectional view taken along III-III of the suspension assembly shown.

[0033] Figure 4 is Figure 2 a front view of the central rod of the suspension motor actuator of the suspension assembly shown.

[0034] Figure 5 is Figure 2 a front view of the stator assembly of the suspension motor actuator of the suspension assembly shown.

[0035] Figure 6 is along Figure 5 a cross-sectional view taken along VII-VII of the stator assembly shown.

[0036] Figure 7 is a side view of a suspension assembly in which an elastic member provided in an exemplary embodiment of the present application is in a compressed state.

[0037] Figure 8 is along Figure 7 a cross-sectional view taken along IX-IX of the suspension assembly shown.

[0038] Figure 9 is a side view of a suspension assembly in which an elastic member provided in an exemplary embodiment of the present application is in a stretched state.

[0039] Figure 10 is along Figure 9 a cross-sectional view taken along B-B of the suspension assembly shown.

[0040] Figure 11 is a schematic diagram of a vehicle module provided in an exemplary embodiment of the present application.

[0041] Description of reference numerals:

[0042] 1000, vehicle; 100, suspension assembly; 110, suspension motor actuator; 120, wheel connector; 200, vehicle body;

[0043] 10, mover assembly; 11, coil assembly; 111, first cavity; 12, guiding structure; 121, first sliding bearing; 122, second sliding bearing; 13, housing; 131, second cavity; 132, open end; 133, mounting groove; 134, connection end; 14, sliding bearing mounting seat;

[0044] 20, stator assembly; 21, permanent magnet assembly; 211, axially magnetized permanent magnet element; 212, radially magnetized permanent magnet element; 22, sleeve; 23, center rod; 231, first connecting shaft section; 232, limiting portion; 233, mounting shaft section; 234, second connecting shaft section; 24, first gasket; 25, fastener; 26, second gasket;

[0045] 30, elastic member. Detailed implementation manners

[0046] 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 the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present application.

[0047] Please refer to Figures 1 to 10The present application provides a suspension motor actuator 110 , which includes a mover assembly 10 and a stator assembly 20 . The mover assembly 10 can have a variable relative displacement along the axial direction Z of the stator assembly 20 .

[0048] Specifically, see Figure 1 and Figure 3 The mover assembly 10 includes a coil assembly 11, the coil assembly 11 has a first cavity 111, and the stator assembly 20 includes a permanent magnet assembly 21, a part of which is accommodated in the first cavity 111. The mover assembly 10 also includes a guide structure 12 arranged around the permanent magnet assembly 21, the guide structure 12 is fixedly connected to one end of the coil assembly 11, and the guide structure 12 and the permanent magnet assembly 21 are slidably matched in the axial direction Z of the stator assembly 20.

[0049] When the center rod (see below) of the stator assembly 20 of the suspension motor actuator 110 is tilted relative to the coil assembly 11, the permanent magnet assembly 21 of the stator assembly 20 will be driven to tilt relative to the coil assembly 11, and the guide structure 12 arranged around the permanent magnet assembly 21 and fixedly connected to one end of the coil assembly 11 can support the permanent magnet assembly 21, so that the air gap between the permanent magnet assembly 21 and the coil assembly 11 is relatively uniform, thereby alleviating to a certain extent the technical problems of reduced magnetic deflection force, lateral force and durability of the suspension motor actuator 110 caused by the uneven air gap between the permanent magnet assembly 21 and the coil assembly 11, as well as severe wear of the sliding pair contact parts and weak durability of the suspension assembly.

[0050] Since a portion of the permanent magnet assembly 21 is accommodated in the first cavity 111 of the coil assembly 11 , that is, the permanent magnet assembly 21 is internally disposed as a stator, and the coil assembly 11 is externally disposed as a mover.

[0051] Among them, the permanent magnet assembly 21 is built-in as a stator to further reduce the risk of the permanent magnet assembly 21 falling off.

[0052] Among them, the coil heat generation of the coil of the linear motor structure with built-in coils commonly used in the industry is concentrated, the internal space is small, the heat transfer path and heat transfer scheme are limited, the heat dissipation capacity is poor, and the output performance of high thrust cannot be achieved; and as the temperature rises, there is also a risk of demagnetization without permanent magnets, which will further reduce the output performance of the linear motor structure. Compared with the linear motor structure with built-in coils, the present application places the coil assembly 11 externally as a mover, and the heat dissipation capacity of the suspension motor actuator is strong, which is more conducive to the thermal management of the coil assembly 11 and helps reduce the risk of demagnetization, thereby achieving greater output thrust performance.

[0053] Among them, the permanent magnet assembly 21 serves as the stator to provide a permanent and constant magnetic field, and the coil assembly 11 serves as the mover. After an alternating current is passed through the coil assembly 11, a changing excitation magnetic field is generated in the coil assembly 11. The permanent and constant magnetic field interacts with the changing excitation magnetic field to generate a traveling wave magnetic field and produce a thrust. Under the action of this thrust, the mover assembly 10 can generate a reciprocating linear motion along the axial direction Z of the stator assembly 20. The mover assembly 10 mainly drives the wheel-end load of the vehicle. 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, the attitude of the whole vehicle can be controlled to achieve the expected goal, and then the full-active real-time adjustment of the suspension can be realized, with fast response time, large thrust, high speed, and high response frequency. During the vehicle driving process, the riding experience of the passengers in the vehicle can be significantly improved.

[0054] In some embodiments of the present application, please refer to again Figure 3 , the guiding structure 12 includes a first sliding bearing 121 and a second sliding bearing 122. Both the first sliding bearing 121 and the second sliding bearing 122 are arranged around the permanent magnet assembly 21 and are respectively fixedly connected to the coil assembly 11. The first sliding bearing 121 and the second sliding bearing 122 are in sliding fit with the permanent magnet assembly 21. The second sliding bearing 122 and the first sliding bearing 121 are respectively located at both ends of the coil assembly 11 on the axial direction Z of the stator assembly 20.

[0055] Among them, the sliding fit means that the first sliding bearing 121 and the second sliding bearing 122 can slide relative to the permanent magnet assembly 21.

[0056] Among them, since the second sliding bearing 122 and the first sliding bearing 121 are respectively located at both ends of the coil assembly 11 in the axial direction Z of the stator assembly 20, and since the guiding structure is in sliding fit with the outer wall of the stator assembly 20 (i.e., the outer peripheral surface of the sleeve of the stator assembly 20), the guiding structure contacts the outer wall of the stator assembly 20. When the permanent magnet assembly 21 is inclined relative to the coil assembly 11, the first sliding bearing 121 and the second sliding bearing 122 can support the permanent magnet assembly 21 at two positions simultaneously, so as to reduce the occurrence probability of the inclination of the permanent magnet assembly 21 relative to the coil assembly to a certain extent, and can ensure the uniformity of the air gap between the permanent magnet assembly 21 and the coil assembly 11 during the movement of the mover assembly, thereby reducing the magnetic deviation force and lateral force of the suspension motor actuator 110, and reducing the wear of the sliding pair contact parts and improving the durability of the actuator assembly. For example: when the permanent magnet assembly 21 is inclined to the left relative to the coil assembly 11, the left side of the permanent magnet assembly 21 has a first support point with the first sliding bearing 121, and the right side of the permanent magnet assembly 21 has a second support point with the second sliding bearing 122. The first sliding bearing 121 and the second sliding bearing 122 can support the permanent magnet assembly 21 at the first support point and the second support point simultaneously in two opposite directions (for example: the direction of the supporting force at the first support point is opposite to the direction of the supporting force at the second support point), and play a guiding and limiting role on the permanent magnet assembly 21.

[0057] In other embodiments of the present application, the guiding structure 12 may also only include the first sliding bearing 121 or the second sliding bearing 122. When the guiding structure 12 includes a sliding bearing (the first sliding bearing 121 or the second sliding bearing 122), the guiding structure 12 also has a certain supporting, guiding and limiting effect on the permanent magnet assembly 21. Of course, when the guiding structure 12 includes two sliding bearings, the supporting, guiding and limiting effect of the sliding bearings on the permanent magnet assembly 21 is stronger.

[0058] In some embodiments of the present application, please refer to again Figure 3 , the mover assembly 10 further includes a housing 13 fixedly connected to the coil assembly 11 in the axial direction Z of the stator assembly 20. The housing 13 has a second cavity 131. One end of the permanent magnet assembly 21 is accommodated in the second cavity 131. The permanent magnet assembly 21 can reciprocate along the axial direction Z of the stator assembly 20 in the second cavity 131. One of the first sliding bearing 121 and the second sliding bearing 122 is installed on the housing 13, and the other of the first sliding bearing 121 and the second sliding bearing 122 is located at the end of the coil assembly 11 away from the housing 13.

[0059] In this embodiment, the second sliding bearing 122 is installed on the housing 13, and the first sliding bearing 121 is located at the end of the coil assembly 11 away from the housing 13.

[0060] In some embodiments of the present application, the housing 13 includes an open end 132, the open end 132 is connected to the coil assembly 11, and the second cavity 131 extends from the open end 132 along the axial direction Z of the stator assembly 20 into the interior of the housing 13. The open end 132 has a mounting groove 133 communicating with the second cavity 131, and one of the first sliding bearing 121 and the second sliding bearing 122 is mounted in the mounting groove 133.

[0061] Among them, by mounting one of the first sliding bearing 121 and the second sliding bearing 122 (for example, the second sliding bearing 122) in the mounting groove 133 of the housing 13, one of the first sliding bearing 121 and the second sliding bearing 122 (for example, the second sliding bearing 122) can be fixed by the housing 13, and the housing 13 functions as a sliding bearing fixing seat. Here, the housing 13 is used to replace the sliding bearing fixing seat, which can simplify the structure of the suspension motor actuator 110.

[0062] In some embodiments of the present application, one of the first sliding bearing 121 and the second sliding bearing 122 (for example, the second sliding bearing 122) is mounted in the mounting groove 133 in an interference fit manner. In this way, one of the first sliding bearing 121 and the second sliding bearing 122 (for example, the second sliding bearing 122) can be tightly connected to the housing 13 to prevent one of the first sliding bearing 121 and the second sliding bearing 122 (for example, the second sliding bearing 122) from falling off or transmitting a large torque.

[0063] In some embodiments of the present application, the end face of the first sliding bearing 121 or the second sliding bearing 122 mounted in the mounting groove 133 close to the coil assembly 11 does not exceed the end face of the open end 132 close to the coil assembly 11. That is, the end face of the first sliding bearing 121 or the second sliding bearing 122 mounted in the mounting groove 133 close to the coil assembly 11 is flush with the end face of the open end 132 close to the coil assembly 11. If the end face of the first sliding bearing 121 or the second sliding bearing 122 mounted in the mounting groove 133 close to the coil assembly 11 exceeds the end face of the open end 132 close to the coil assembly 11, the housing 13 cannot contact and connect with the coil assembly 11, and the housing 13 and the second sliding bearing 122 are likely to fall off.

[0064] In some embodiments of the present application, the housing 13 further includes a connection end 134, the connection end 134 is arranged away from the coil assembly 11, and the connection end 134 is fixedly connected to the wheel end structure of the vehicle through the wheel connector 120. The connection end 134 is used to connect the wheel connector 120.

[0065] In some embodiments of the present application, the mover assembly 10 further includes a sliding bearing mount 14. The sliding bearing mount 14 is fixedly connected to the coil assembly 11, and the other of the first sliding bearing 121 and the second sliding bearing 122 is mounted in the sliding bearing mount 14 and abuts against the coil assembly 11.

[0066] In this embodiment, the first sliding bearing 121 is mounted in the sliding bearing mount 14 and abuts against the coil assembly 11.

[0067] Since there is no component similar to the housing 13 on one side of the first sliding bearing 121 at the end of the coil assembly 11 away from the housing 13, it is necessary to install and fix the first sliding bearing 121 through the sliding bearing mount 14 to prevent the first sliding bearing 121 from falling off, so as to ensure the supporting, guiding and limiting functions of the first sliding bearing 121 on the permanent magnet assembly 21.

[0068] In some embodiments of the present application, please refer to again Figure 3 , Figure 5 and Figure 6 , the permanent magnet assembly 21 includes an axially magnetized permanent magnet element 211 and a radially magnetized permanent magnet element 212. The axially magnetized permanent magnet element 211 and the radially magnetized permanent magnet element 212 are both annular, and the axially magnetized permanent magnet element 211 and the radially magnetized permanent magnet element 212 are alternately arranged adjacent to each other in the axial direction of the coil assembly 11 to the required height. The permanent magnet assembly 21 provides a permanent and constant magnetic field as the stator.

[0069] In other embodiments, the permanent magnet assembly 21 may also include only one of the axially magnetized permanent magnet element 211 and the radially magnetized permanent magnet element 212.

[0070] In some embodiments of the present application, please refer to again Figure 3 , the stator assembly 20 further includes a sleeve 22 and a center rod 23. The sleeve 22 is arranged around the permanent magnet assembly 21, and the gap between the sleeve 22 and the coil assembly 11 is uniform. The permanent magnet assembly 21 is arranged around the center rod 23, the guiding structure 12 is arranged around the sleeve 22, and the guiding structure 12 is slidably engaged with the sleeve 22 in the axial direction Z of the stator assembly 20. In this embodiment, the first sliding bearing 121 and the second sliding bearing 122 are respectively located at different positions of the sleeve 22.

[0071] Among them, a sleeve 22 is arranged on the outer side (outer peripheral surface) of the permanent magnet assembly 21, and the permanent magnet assembly 21 is fastened to the center rod 23 through the sleeve 22, effectively restricting the movable space of the permanent magnet assembly 21, reducing the risk of the permanent magnet assembly 21 falling off, and further ensuring the stability and reliability of the constant magnetic field generated by the permanent magnet assembly 21.

[0072] In some embodiments of the present application, two ends of the sleeve 22 in the axial direction Z of the stator assembly 20 are respectively aligned with two ends of the permanent magnet assembly 21 in the axial direction Z of the stator assembly 20 .

[0073] In some embodiments of the present application, the sleeve 22 is ring-shaped.

[0074] In some embodiments of the present application, the sleeve 22 is bonded to the outer circumference of the permanent magnet assembly 21 by applying glue on the inner circumference, and the upper and lower ends are aligned. The inner circumference of the sleeve 22 is the surface of the sleeve 22 facing the permanent magnet assembly 21 and away from the coil assembly 11.

[0075] In some embodiments of this application, please refer to Figure 3 Right now Figure 4 The center rod 23 includes a first connecting shaft section 231, a limiting portion 232 and a mounting shaft section 233. The limiting portion 232 is located between the first connecting shaft section 231 and the mounting shaft section 233 and protrudes from the first connecting shaft section 231 and the mounting shaft section 233 along the radial direction of the center rod 23. The first connecting shaft section 231 is configured to connect to the vehicle body. The permanent magnet assembly 21 is mounted on the mounting shaft section 233 of the center rod 23, and one end of the permanent magnet assembly 21 abuts against the limiting portion 232. The limiting portion 232 is used to limit the permanent magnet assembly 21 and the sleeve 22.

[0076] In some embodiments of the present application, the permanent magnet assembly 21 is bonded to the outer circumference of the mounting shaft section 233 of the center rod 23 by means of gluing the inner circumference. The inner circumference of the permanent magnet assembly 21 is the surface of the permanent magnet assembly 21 facing the center rod 23 and away from the sleeve 22, and the outer circumference of the mounting shaft section 233 of the center rod 23 is the surface facing the permanent magnet assembly 21.

[0077] In some embodiments of the present application, the first connecting shaft section 231 of the center rod 23 is threadedly connected to a related structural member of the vehicle body.

[0078] In some embodiments of the present application, the center rod 23 further includes a second connecting shaft segment 234, which is located on a side of the mounting shaft segment 233 away from the limiting portion 232 and connected to the mounting shaft segment 233. The stator assembly 20 further includes a first gasket 24, a fastener 25, and a second gasket 26, wherein the first gasket 24 is disposed around the mounting shaft segment 233 and is located between one end of the permanent magnet assembly 21 close to the limiting portion 232 and the limiting portion 232, the fastener 25 is disposed around the second connecting shaft segment 234 and is connected to the second connecting shaft segment 234, and the second gasket 26 is disposed around the second connecting shaft segment 234 and is located between one end of the permanent magnet assembly 21 away from the limiting portion 232 and the fastener 25.

[0079] In some embodiments of the present application, the fastener 25 is a fastening nut, and the fastener 25 is threadedly connected to the second connecting shaft section 234 of the central rod 23. The fastener 25 has internal threads, and the second connecting shaft section 234 has external threads, and the internal threads are engaged with the external threads.

[0080] Wherein, a sleeve 22 is provided on the outer side (outer peripheral surface) of the permanent magnet assembly 21, and a first gasket 24 and a second gasket 26 are provided at both ends of the permanent magnet assembly 21. The sleeve 22, the first gasket 24, the fastener 25, the second gasket 26 and the limiting portion 232 cooperate with each other to further fasten the permanent magnet assembly 21 on the central rod 23, effectively restricting the movable space of the permanent magnet assembly 21, and further reducing the risk of the permanent magnet assembly 21 falling off, thereby further ensuring the stability and reliability of the constant magnetic field generated by the permanent magnet assembly 21.

[0081] In some embodiments of the present application, please refer to again Figure 3 , the suspension motor actuator 110 further includes an elastic member 30. The elastic member 30 is disposed around the stator assembly 20 protruding from the rotor assembly 10. One end of the elastic member 30 is fixedly connected (for example: abutted) to the coil assembly 11, that is, the rotor assembly 10 is configured as an unsprung mass. The other end of the elastic member 30 is configured to be connected to the vehicle body, and the elastic member 30 is used to support the weight of the vehicle body.

[0082] Wherein, one of the first sliding bearing 121 and the second sliding bearing 122 is located between the elastic member 30 and the sleeve 22. In this embodiment, the first sliding bearing 121 is located between the elastic member 30 and the sleeve 22. Since there is an elastic member 30 on the side of the first sliding bearing 121, the first sliding bearing 121 is fixed by a sliding bearing fixing seat instead of a housing or the like.

[0083] Wherein, one end of the first connecting shaft section 231 of the central rod 23 away from the limiting portion 232 protrudes from one end of the elastic member 30 away from the coil assembly 11, and one end of the elastic member 30 away from the coil assembly 11 protrudes from the limiting portion 232.

[0084] In some embodiments of the present application, the elastic member 30 is a helical spring.

[0085] Please refer to again Figure 7 and Figure 8 , the elastic member 30 is in the first limit state. At this time, the elastic member 30 is in a compressed state and has a maximum compression length. Among them, the maximum compression length of the elastic member 30 should be greater than the maximum upward jump stroke of the suspension motor actuator 110.

[0086] Please refer to again Figure 9 and Figure 10, the elastic member 30 is in the second limit state. At this time, the elastic member 30 is in a stretched state and has the maximum stretched length. At this time, the elastic member 30 is in the second limit state.

[0087] Please refer to again Figure 2 and Figure 3 , the elastic member 30 is in an intermediate state, that is, the elastic member 30 is between the first limit state and the second limit state. At this time, the elastic member 30 may be in a compressed state or a stretched state.

[0088] Among them, when the elastic member 30 is in any one of the first limit state, the intermediate state and the second limit state, in the axial direction Z of the stator assembly 20, the area of the positive projection of the elastic member 30 on the coil assembly 11 remains unchanged. That is, the overlapping area between the elastic member 30 and the coil assembly 11 remains unchanged. In this way, in any state, the supporting effect of the elastic member 30 on the vehicle body will not change.

[0089] Please refer to again Figure 1 , the second aspect of the present application also provides a suspension assembly 100, and the suspension assembly 100 includes the suspension motor actuator 110 as described above.

[0090] In some embodiments of the present application, the suspension assembly 100 further includes a wheel connecting member 120. The connecting end 134 of the housing 13 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.

[0091] Please refer to Figure 11 , the third aspect of the present application also provides a vehicle 1000, and the vehicle 1000 includes the suspension assembly 100 and the vehicle body 200 as described above, and the vehicle body 200 is connected to the elastic member 30 of the suspension assembly 100.

[0092] In the suspension motor actuator, the suspension assembly and the vehicle of the embodiments of the present application, by adding a guiding structure arranged around the permanent magnet assembly of the stator assembly in the mover assembly of the suspension motor actuator, and making the guiding structure fixedly connected to one end of the coil assembly, the guiding structure is slidably matched with the permanent magnet assembly in the axial direction of the stator assembly. When the central rod of the stator assembly of the suspension motor actuator is inclined relative to the coil assembly of the suspension motor actuator, it will drive the permanent magnet assembly of the stator assembly to be inclined relative to the coil assembly. The guiding structure can support the central rod, so that the air gap between the permanent magnet assembly and the coil assembly is relatively uniform, thereby alleviating to a certain extent the technical problems of the magnetic deviation force, lateral force and durability reduction of the suspension motor actuator caused by the uneven air gap between the permanent magnet assembly and the coil assembly, the serious wear of the sliding pair contact parts, and the weak durability of the suspension assembly.

[0093] In addition, the permanent magnet assembly provides a permanent constant magnetic field as a stator, and the coil assembly serves as a mover. After an alternating current is passed through the coil assembly, a changing excitation magnetic field is generated in the coil assembly. The permanent constant magnetic field interacts with the changing excitation magnetic field to generate a traveling wave magnetic field and thrust. Under the action of this thrust, the mover assembly can generate reciprocating linear motion along the axial direction of the stator assembly. The mover assembly mainly drives the wheel end load of the vehicle, actively controls the dynamic state of the wheel end, and then controls the posture of the entire vehicle to achieve the desired goal, thereby realizing full active real-time adjustment of the suspension, with fast response time, large thrust, high speed, and high response frequency. During the vehicle's driving process, it can significantly improve the driving experience of the occupants.

[0094] In addition, the permanent magnet assembly is built-in as a stator to further reduce the risk of the permanent magnet assembly falling off. Compared with the linear motor structure with built-in coils, the present application places the coil assembly externally as a mover. The suspension motor actuator has a strong heat dissipation capacity, which is more conducive to the thermal management of the coil assembly and helps reduce the risk of demagnetization, thereby achieving greater output thrust performance.

[0095] In addition, a sleeve is arranged on the outside (outer peripheral surface) of the permanent magnet assembly, and a first gasket and a second gasket are arranged at both ends of the permanent magnet assembly. The sleeve, the first gasket, the fastener, the second gasket and the limit portion cooperate with each other to further fasten the permanent magnet assembly to the center rod, effectively constraining the movable space of the permanent magnet assembly, further reducing the risk of the permanent magnet assembly falling off, and further ensuring the stability and reliability of the constant magnetic field generated by the permanent magnet assembly.

[0096] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0097] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0098] The embodiments, implementation methods and related technical features of the present application can be combined and replaced with each other without conflict.

[0099] The above are only the preferred embodiments of the present application, and do not impose any formal restrictions on the present application. Although in the existing embodiments of the present application, the descriptions of each embodiment have their own focuses, for the parts not detailed in a certain embodiment, reference can be made to the relevant embodiments of other embodiments. However, any modifications, equivalent changes, and decorations 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: A mover assembly includes a coil assembly, wherein the coil assembly has a first cavity; and A stator assembly, comprising a permanent magnet assembly; a portion of the permanent magnet assembly is accommodated in the first cavity; The mover assembly further comprises a guide structure, which is arranged around the permanent magnet assembly and fixedly connected to one end of the coil assembly, and the guide structure and the permanent magnet assembly are slidably matched in the axial direction of the stator assembly.

2. The suspension motor actuator according to claim 1, characterized in that: The guiding structure comprises: The first sliding bearing is arranged around the permanent magnet assembly, fixedly connected to the coil assembly and slidingly matched with the permanent magnet assembly.

3. The suspension motor actuator according to claim 2, characterized in that: The guide structure also includes: A second sliding bearing is arranged around the permanent magnet assembly and fixedly connected to the mover assembly, and the second sliding bearing is slidably matched with the permanent magnet assembly; The second sliding bearing and the first sliding bearing are respectively located at two ends of the coil assembly in the axial direction of the stator assembly.

4. The suspension motor actuator according to claim 3, characterized in that: The mover assembly also includes: A housing, fixedly connected to the coil assembly; The shell has a second cavity, one end of the permanent magnet assembly is accommodated in the second cavity, the permanent magnet assembly can reciprocate in the second cavity along the axial direction of the stator assembly, one of the first sliding bearing and the second sliding bearing is installed on the shell, and the other of the first sliding bearing and the second sliding bearing is located at an end of the coil assembly away from the shell.

5. The suspension motor actuator according to claim 4, characterized in that: The housing comprises: An open end connected to the coil assembly, wherein the second cavity extends from the open end along the axial direction of the stator assembly toward the interior of the housing; The open end has a mounting groove communicated with the second cavity, and one of the first sliding bearing and the second sliding bearing is installed in the mounting groove.

6. The suspension motor actuator according to claim 5, characterized in that: One of the first sliding bearing and the second sliding bearing is installed in the installation groove in an interference fit manner.

7. The suspension motor actuator according to claim 5, characterized in that: The end surface of the first sliding bearing or the second sliding bearing installed in the installation groove close to the coil assembly does not exceed the end surface of the opening end close to the coil assembly.

8. The suspension motor actuator according to claim 5, characterized in that: The mover assembly also includes: A sliding bearing mounting seat, fixedly connected to the coil assembly; The other of the first sliding bearing and the second sliding bearing is installed in the sliding bearing mounting seat and abuts against the coil assembly.

9. The suspension motor actuator according to claim 5, characterized in that: The housing further comprises: A connection end is arranged away from the coil assembly; Wherein, the connecting end is fixedly connected to the wheel end load of the vehicle through a wheel connecting piece.

10. The suspension motor actuator according to any one of claims 3 to 9, characterized in that: The stator assembly further comprises: a sleeve, disposed around the permanent magnet assembly; and A central rod, the permanent magnet assembly is arranged around the central rod; Wherein, the guide structure is arranged around the sleeve, and the guide structure and the sleeve are slidably matched in the axial direction of the stator assembly.

11. The suspension motor actuator according to claim 10, characterized in that: Two ends of the sleeve in the axial direction of the stator assembly are respectively aligned with two ends of the permanent magnet assembly in the axial direction of the stator assembly.

12. The suspension motor actuator according to claim 10, characterized in that: The center rod comprises a first connecting shaft segment, a limiting portion and a mounting shaft segment, wherein the limiting portion is located between the first connecting shaft segment and the mounting shaft segment and protrudes from the first connecting shaft segment and the mounting shaft segment along a radial direction of the center rod, and the first connecting shaft segment is configured to be connected to a vehicle body; Wherein, the permanent magnet assembly is installed on the installation shaft section of the central rod, and one end of the permanent magnet assembly abuts against the limiting portion.

13. The suspension motor actuator according to claim 12, characterized in that: The coil assembly is located on the outer wall side of the sleeve away from the central rod and can reciprocate relative to the sleeve along the axial direction of the stator assembly; and / or The guide structure is arranged around the outer side of the sleeve away from the center rod and is connected to one end of the coil assembly near the limiting portion of the center rod; the inner circumference of the guide structure close to the sleeve is slidably matched with the outer circumference of the sleeve away from the center rod.

14. The suspension motor actuator according to claim 12, characterized in that: The central rod further comprises a second connecting shaft segment, which is located at a side of the installation shaft segment away from the limiting portion and connected to the installation shaft segment; The stator assembly further comprises: A first gasket, arranged around the mounting shaft segment and located between an end of the permanent magnet assembly close to the limiting portion and the limiting portion; a fastener, disposed around the second connecting shaft segment and connected to the second connecting shaft segment; and The second gasket is arranged around the second connecting shaft segment and is located between an end of the permanent magnet assembly away from the limiting portion and the fastener.

15. The suspension motor actuator according to claim 10, characterized in that: The suspension motor actuator also includes: An elastic member is arranged around the stator assembly protruding from the mover assembly; One end of the elastic member is fixedly connected to the coil assembly, and the other end is configured to be connected to a vehicle body, and one of the first sliding bearing and the second sliding bearing is located between the elastic member and the sleeve.

16. The suspension motor actuator according to claim 15, characterized in that: The elastic member has a first limit state, a second limit state and an intermediate state between the first limit state and the second limit state; Wherein, the overlapping area between the elastic member and the coil assembly in the axial direction of the stator assembly remains unchanged.

17. The suspension motor actuator according to claim 16, characterized in that: When the elastic member is in the first limit state, the elastic member is in a compressed state and has a maximum compressed length, and the maximum compressed length of the elastic member is greater than the maximum upward jump stroke of the suspension motor actuator.

18. The suspension motor actuator according to any one of claims 1 to 9, 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 stacked in the axial direction of the stator assembly.

19. A suspension assembly, characterized in that: It comprises the suspension motor actuator according to any one of claims 1 to 18.

20. The suspension assembly according to claim 19, characterized in that: A wheel connecting member is also included. The connecting end of the housing of the suspension motor actuator is connected to the wheel connecting member. The wheel connecting member is configured to connect to a wheel end load of a vehicle.

21. A vehicle, characterized in that: Comprising a suspension assembly as claimed in claim 19 or 20.

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