Linear motor and vehicle electromagnetic suspension

Abstract

The present application relates to the technical field of electric machines, and discloses a linear motor and a vehicle electromagnetic suspension, the linear motor comprising: a motor stator and a motor rotor, the motor stator and the motor rotor being in a cylindrical shape, the axial length of the motor rotor being greater than the axial length of the motor stator; a guide assembly, the guide assembly being arranged between the motor stator and the motor rotor, and comprising a sliding block, a fixing member and a guide rail, the sliding block and the guide rail being in sliding connection, the sliding block being arranged on the motor stator, the fixing member being arranged at both ends of the motor stator to fix the sliding block, and the guide rail being arranged on the motor rotor. The structure of the present application is more compact, the volume can be reduced, the miniaturization and light weight of the motor can be realized, and large thrust density can be achieved, thereby breaking through the problems of large volume, heavy weight and high cost of the linear motor used by the electromagnetic suspension of the vehicle in the related art.

Description

Technical Field

[0001] This invention relates to the field of motor technology, and more particularly to a linear motor and a vehicle electromagnetic suspension. Background Technology

[0002] Based on the driving experience and safety considerations, vehicle suspension systems are evolving from mechanical damping to electromagnetic damping, and from passive to active damping. With the electrification and intelligentization of vehicles, and the increasing demands for better driving experience and safety, linear motor electromagnetic suspension is gradually moving from concept to application. This technology is beneficial for achieving a superior driving experience and significantly improving the safety of vehicle acceleration, deceleration, and cornering. However, the linear motors used in related vehicle electromagnetic suspension technologies suffer from problems such as large size, heavy weight, and high cost, severely restricting their widespread application in vehicle electromagnetic suspension systems. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention proposes a linear motor that has a smaller size, enables lightweight and miniaturized design, reduces manufacturing costs, and also has a larger thrust density.

[0004] The present invention also aims to provide a vehicle electromagnetic suspension for using the aforementioned linear motor.

[0005] A linear motor according to an embodiment of the present invention includes: a motor stator and a motor mover, the motor stator and the motor mover being cylindrical, the axial length of the motor mover being greater than the axial length of the motor stator; a guide assembly disposed between the motor stator and the motor mover to allow the motor stator and the motor mover to be slidably connected, the guide assembly including a slider, a fixing member, and a guide rail, the slider and the guide rail being slidably connected, the slider being disposed on the motor stator, the fixing member being disposed at both ends of the motor stator to fix the slider, and the guide rail being disposed on the motor mover.

[0006] According to the linear motor of the present invention, the motor stator and the motor mover can form a stable and reliable linear motor structure through the guide assembly. The overall structure of the linear motor is more compact, which is conducive to reducing the volume and realizing the miniaturization and weight reduction of the motor. Moreover, under the same thrust, the reduction in the volume of the linear motor is conducive to achieving a large thrust density, thereby overcoming the problems of large volume, heavy weight and high cost of linear motors used in vehicle electromagnetic suspension in related technologies.

[0007] In some embodiments of the present invention, the fixing member is ring-shaped and fixedly connected to the end of the motor stator.

[0008] In some embodiments of the present invention, there is one guide rail, and one or more sliders are provided on the guide rail.

[0009] In some embodiments of the present invention, there are multiple guide rails, the number of multiple guide rails is even, and two are arranged symmetrically along the radial direction of the motor stator; or, the number of multiple guide rails is odd and they are arranged at equal intervals along the circumference of the motor stator, wherein each guide rail is provided with one or more sliders.

[0010] In some embodiments of the present invention, the motor stator includes a stator core and a winding, the winding being disposed on the stator core, and the slider and the fixing member being disposed on the stator core; the motor mover includes a mover core and a mover magnet, the mover core being cylindrical, the guide rail being disposed on the mover core, and the mover magnet being disposed on the side of the mover core on which the guide rail is disposed. In the radial direction of the motor mover, the motor stator is disposed on the outer side of the motor mover, and the maximum outer diameter of the assembly formed by the motor mover, the guide rail, and the mover magnet is smaller than the inner diameter of the motor stator; or, the motor stator is disposed on the inner side of the motor mover, and the minimum inner diameter of the assembly formed by the motor mover, the guide rail, and the mover magnet is larger than the outer diameter of the motor stator.

[0011] In some embodiments of the present invention, the motor stator has a fixed end, and the motor mover has a connecting member at the other end away from the fixed end. The linear motor includes a hydraulic damping component, which is disposed in a hollow hole located on the inner side of one of the motor stator and the motor mover. The hydraulic damping component includes a hydraulic damping body and a piston rod, which is telescopically disposed on the hydraulic damping body, and one end of the piston rod is connected to the connecting member.

[0012] In some embodiments of the present invention, the motor stator has a fixed end and a non-fixed end, the motor mover has a connecting member at the other end away from the fixed end, the linear motor includes an elastic member that extends along the axial direction of the linear motor, one end of the elastic member is connected to the connecting member, and the other end is connected to the non-fixed end.

[0013] In some embodiments of the present invention, the motor stator has a fixed end and a non-fixed end, the motor mover has a connecting member at the other end away from the fixed end, the linear motor includes an elastic member that extends along the axial direction of the linear motor, the elastic member is located outside the outermost one of the motor stator and the motor mover, one end of the elastic member is connected to the connecting member, and the other end is connected to the fixed end.

[0014] In some embodiments of the present invention, the linear motor includes a heat exchange component, which is fitted together with the motor stator to exchange heat with the motor stator. The motor stator has an annular side surface that fits onto the heat exchange component, and the heat exchange component and the annular side surface are circumferentially fitted together.

[0015] In some embodiments of the present invention, the motor stator is disposed on the outside of the motor mover, and the heat exchange component is cylindrical and sleeved on the outer side of the motor stator; or, the motor stator is disposed on the inside of the motor mover, and the heat exchange component is columnar and sleeved on the inner side of the motor stator.

[0016] According to an embodiment of the present invention, a vehicle electromagnetic suspension includes a linear motor as described above.

[0017] According to an embodiment of the present invention, the vehicle electromagnetic suspension can reduce its size and weight by using the linear motor, which also helps to reduce the manufacturing cost of the vehicle electromagnetic suspension.

[0018] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 A side view of a linear motor in the first embodiment of the present invention; Figure 2 for Figure 1 A sectional view taken along line AA; Figure 3 A side view of the linear motor in the second embodiment of the present invention; Figure 4 for Figure 3 A sectional view taken along line AA; Figure 5 A cross-sectional view of a linear motor according to a third embodiment of the present invention; Figure 6 A cross-sectional view of a linear motor according to a fourth embodiment of the present invention; Figure 7 A cross-sectional view of a linear motor according to the fifth embodiment of the present invention; Figure 8 A cross-sectional view of a linear motor according to a sixth embodiment of the present invention; Figure 9 A cross-sectional view of a linear motor according to the seventh embodiment of the present invention; Figure 10 A cross-sectional view of a linear motor according to the eighth embodiment of the present invention; Figure 11 A side view of a linear motor according to the ninth embodiment of the present invention; Figure 12 for Figure 11 A sectional view taken along line AA; Figure 13 A side view of a linear motor according to the tenth embodiment of the present invention; Figure 14 for Figure 13 A sectional view taken along line AA.

[0020] Figure label: 100. Linear motor; 10. Motor stator; 101. Stator core; 1011. Stator teeth; 1012. Stator yoke; 102. Winding; 10a. Non-fixed end; 10b. Fixed end; 10c. First groove; 20. Motor mover; 201. Mover core; 202. Mover magnet; 20a. Second groove; 30. Guide assembly; 301. Slider; 302. Fixture; 303. Guide rail; 40. Hydraulic damping component; 401. Hydraulic damping body; 402. Piston rod; 50. Elastic element; 60. Heat exchange component; 60a. Heat exchange medium inlet / outlet; 60b. Heat exchange medium outlet / inlet; 601. Heat exchange medium inlet pipe; 70. Locating pin; 80. Connecting part; 90. Fastening screw. Detailed Implementation

[0021] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0022] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more. In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] The following is for reference. Figures 1-14 The following describes a linear motor 100 according to an embodiment of the present invention.

[0024] like Figures 1 to 4 As shown, a linear motor 100 according to an embodiment of the present invention includes: a motor stator 10, a motor mover 20, and a guide assembly 30. The motor stator 10 and the motor mover 20 are cylindrical, and the axial length of the motor mover 20 is greater than the axial length of the motor stator 10. The guide assembly 30 is disposed between the motor stator 10 and the motor mover 20 to allow the motor stator 10 and the motor mover 20 to be slidably connected. The guide assembly 30 includes a slider 301, a fixing member 302, and a guide rail 303. The slider 301 and the guide rail 303 are slidably connected. The slider 301 is disposed on the motor stator 10, the fixing member 302 is disposed at both ends of the motor stator 10 to fix the slider 301, and the guide rail 303 is disposed on the motor mover 20.

[0025] In the above technical solution, the motor stator 10 and the motor mover 20 are cylindrical, thus the linear motor 100 can be a rod-shaped linear motor. Optionally, the linear motor 100 can also be a three-phase cylindrical linear motor with an iron core. For example, three-phase windings (U phase, V phase, and W phase) can be placed on the motor stator 10.

[0026] The axial length of the motor mover 20 is greater than that of the motor stator 10, allowing the motor mover 20 to perform a larger displacement relative to the motor stator 10. This increases the stroke of the linear motor 100 and allows for further external expansion of the motor mover 20, further increasing the stroke. The motor stator 10 and motor mover 20 are connected by a sliding assembly 30. Optionally, refer to... Figure 1 and Figure 2 The linear motor 100 can have its stator 10 located on the outside and its mover 20 located on the inside. Alternatively, refer to... Figure 3 and Figure 4 The linear motor 100 can also have the motor mover 20 located on the outside and the motor stator 10 located on the inside.

[0027] Slider 301 and guide rail 303 can refer to a linear sliding mechanism, and guide rail 303 can be a linear guide rail. Optionally, refer to... Figure 1 and Figure 2 The guide rail 303 can be mounted on the outside of the motor mover 20 with screws, and the slider 301 is mounted on the inside of the motor stator 10. The slider 301 is fixed to both ends of the motor stator 10 by fasteners 302. Optionally, refer to... Figure 3 and Figure 4 The guide rail 303 can also be installed on the inner side of the motor mover 20 with screws, and the slider 301 can be installed on the outer side of the motor stator 10. The slider 301 is fixed at both ends of the motor stator 10 by the fixing parts 302. Since the slider 301 is wide and short, its installation on the stator side can realize the miniaturization of the motor stator 10 and the increase of the effective thrust area of ​​the motor, thus achieving high thrust density of the motor. At the same time, the guide rail 303 is installed on the long mover side with magnets, which can realize the stability of the guide rail 303 installation and the fast response of the mover and smooth operation under high acceleration and deceleration, thereby achieving long service life and easy maintenance of the motor.

[0028] Optionally, refer to Figure 1 and Figure 3 The motor stator 10 may have a first groove 10c at the position where the slider 301 is located. The bottom surface of the first groove 10c may be machined into a flat surface. The slider 301 is mounted on the flat surface. This ensures the correct installation of the slider 301 and improves installation accuracy. Optionally, refer to... Figure 1 and Figure 3 The position of the guide rail 303 on the motor mover 20 can be provided with a second groove 20a. The bottom surface of the second groove 20a can be machined into a flat surface. The guide rail 303 is installed on the flat surface. This can ensure the correct installation of the guide rail 303 and improve the installation accuracy.

[0029] According to the linear motor 100 of the present invention, the motor stator 10 and the motor mover 20 can form a stable and reliable linear motor structure through the guide assembly 30. The overall structure of the linear motor 100 is more compact, which is conducive to reducing the volume and realizing the miniaturization and weight reduction of the motor. Moreover, under the same thrust, the reduced volume of the linear motor 100 is conducive to achieving a large thrust density, thereby overcoming the problems of large volume, heavy weight and high cost of linear motors used in electromagnetic suspension of vehicles in related technologies.

[0030] In some embodiments of the present invention, such as Figure 1 and Figure 3 As shown, the fixing member 302 is ring-shaped and fixedly connected to the end of the motor stator 10. By setting the fixing member 302 to be ring-shaped, on the one hand, it does not affect the hollow hole in the middle component of the motor stator 10 and the motor mover 20, making it easier for other components to be installed in the hollow hole; on the other hand, it also reduces the installation requirements for the fixing member 302. The fixing member 302 does not need to be deliberately adjusted to limit the slider 301, which can reduce the installation difficulty and improve the installation efficiency.

[0031] Optionally, refer to Figure 1 and Figure 3 The end of the motor stator 10 may be provided with a positioning pin hole (not shown in the figure) and a screw hole (not shown in the figure). The fixing member 302 can be engaged with the positioning pin 70 and the positioning pin hole, and with the fastening screw 90 and the screw hole, so as to limit the slider 301 between the two ends of the motor stator 10, so as to ensure that the slider 301 installed at both ends of the motor stator 10 is in the same position, and to ensure that the slider 301 and the guide rail 303 run smoothly and work stably.

[0032] In some embodiments of the present invention, there is one guide rail 303, and one or more sliders 301 are correspondingly provided on the guide rail 303. That is, the motor stator 10 and the motor mover 20 are slidably connected by only one guide unit consisting of a guide rail 303 and a slider 301. The guide rail 303 may be used with one slider 301, for example, the slider 301 may be centrally located at the center of the motor stator 10. The guide rail 303 may also be used with multiple sliders 301, for example, two sliders 301 may be provided at both axial ends of the motor stator 10.

[0033] In some embodiments of the present invention, there are multiple guide rails 303, the number of which is even, and they are arranged symmetrically in pairs along the radial direction of the motor stator 10. Each guide rail 303 is provided with one or more sliders 301. For example, see reference Figure 1There are two guide rails 303, which are symmetrically arranged in the radial direction of the motor stator 10. By symmetrically arranging the guide unit composed of the guide rails 303 and the sliders 301 in the radial direction of the motor stator 10, it is ensured that the forces between the guide structure composed of the symmetrically arranged sliders 301 and guide rails 303 can cancel each other out and will not generate component forces. This allows the motor stator 10 and the motor mover 20 to always maintain good concentricity, improving the stability and reliability of the linear motion of the motor mover 20 on the motor stator 10.

[0034] In some embodiments of the present invention, the number of multiple guide rails 303 is odd and they are equally spaced along the circumference of the motor stator 10, and each guide rail 303 is provided with one or more sliders 301. For example, there are three guide rails 303, which are spaced 120 degrees apart in the circumferential direction of the motor stator 10.

[0035] In some embodiments of the present invention, such as Figure 2 and Figure 4 The motor stator 10 includes a stator core 101 and a winding 102. The winding 102 is disposed on the stator core 101, and the slider 301 and the fixing member 302 are disposed on the stator core 101. Since the axial length of the motor mover 20 is greater than the axial length of the motor stator 10, the size of the winding 102 can be reduced. This reduces the heat source of the linear motor 100 at its source, thereby enabling the linear motor 100 to have low heat generation performance and improving the reliability of the linear motor 100.

[0036] Furthermore, such as Figure 2 and Figure 4 As shown, the stator core 101 may include a stator tooth portion 1011 and a stator yoke portion 1012, with a tooth groove formed between the stator tooth portion 1011 and the stator yoke portion 1012, and the winding 102 is disposed in the tooth groove.

[0037] In some embodiments of the present invention, such as Figure 2 and Figure 4 The motor mover 20 includes a mover core 201 and a mover magnet 202. The mover core 201 is cylindrical, and a guide rail 303 is provided on the mover core 201. The mover magnet 202 is provided on one side of the mover core 201 where the guide rail 303 is provided, in the radial direction of the motor mover 20.

[0038] In some embodiments, such as Figure 2As shown, the motor stator 10 is located outside the motor mover 20. The maximum outer diameter of the assembly formed by the motor mover 20, guide rail 303, and mover magnet 202 is smaller than the inner diameter of the motor stator 10. The maximum outer diameter of the assembly formed by the motor mover 20, guide rail 303, and mover magnet 202 can refer to the outer diameter of the circle concentric with the motor mover 20 and tangent to the outermost component (e.g., mover magnet 202). This arrangement ensures the magnetic gap between the motor stator 10 and the motor mover 20, thereby guaranteeing the thrust performance of the motor and the mobility of the motor mover 20 within the motor stator 10, thus ensuring the thrust performance of the motor.

[0039] In some embodiments, such as Figure 4 As shown, the motor stator 10 is located inside the motor mover 20. The minimum inner diameter of the assembly formed by the motor mover 20, guide rail 303, and mover magnet 202 is larger than the outer diameter of the motor stator 10. The minimum inner diameter of the assembly formed by the motor mover 20, guide rail 303, and mover magnet 202 can refer to the inner diameter of the circle concentric with the motor mover 20 and tangent to the innermost component (e.g., mover magnet 202). This arrangement ensures the magnetic gap between the motor stator 10 and the motor mover 20, thereby guaranteeing the thrust performance of the motor and the mobility of the motor mover 20 within the motor stator 10, thus ensuring the thrust performance of the motor.

[0040] In some embodiments of the present invention, such as Figure 5 and Figure 6 As shown, the motor stator 10 has a fixed end 10b, and the motor mover 20 has a connector 80 at the other end away from the fixed end 10b. The linear motor 100 includes a hydraulic damping component 40, which is disposed in the hollow hole of the inner side of the motor stator 10 and the motor mover 20. The hydraulic damping component 40 includes a hydraulic damping body 401 and a piston rod 402. The piston rod 402 is telescopically disposed on the hydraulic damping body 401, and one end of the piston rod 402 is connected to the connector 80.

[0041] For example, refer to Figure 1 and Figure 5 The stator 10 of the linear motor 100 is located on the outside, the mover 20 is located on the inside, the hydraulic damping component 40 is located in the hollow hole of the mover 20, the piston rod 402 is connected to one end of the mover 20 through the connector 80, and the hydraulic damping body 401 and the stator 10 are fixed together.

[0042] For example, refer to Figure 2 and Figure 6The motor mover 20 of the linear motor 100 can be located on the outside, and the motor stator 10 is located on the inside. The hydraulic damping component 40 is located in the hollow hole of the motor stator 10. The piston rod 402 is connected to one end of the motor mover 20 through the connector 80. The hydraulic damping body 401 and the motor stator 10 are fixed together.

[0043] The hydraulic damping component 40 can refer to a device that achieves vibration reduction through hydraulic action, such as a hydraulic shock absorber. The hydraulic damping body 401 can refer to a part including a cylinder, valves, and hydraulic pipelines, etc., and the piston rod 402 refers to a rod component that can perform telescopic movement. The connecting component 80 can be a connecting plate.

[0044] In the above technical solution, the hydraulic damper 40 is installed in the hollow hole on the inner side of either the motor stator 10 or the motor mover 20. This fully utilizes the internal space, ensuring the compact structure of the linear motor 100, further facilitating motor miniaturization and increasing thrust density. The linear motor 100 and the hydraulic damper 40 can work individually or simultaneously. When working simultaneously, part of the damping force can be provided by the hydraulic damper 40, reducing the continuous thrust of the linear motor 100 and thus lowering its energy consumption. When the hydraulic damper 40 provides damping force alone, passive damping is achieved, and the damping force is not adjustable. When the linear motor 100 provides damping force alone or both provide damping force simultaneously, active damping is achieved, and the damping force is adjustable, thus meeting different damping requirements.

[0045] In some embodiments of the present invention, such as Figure 7 and Figure 8 As shown, the motor stator 10 has a fixed end 10b and a non-fixed end 10a. The motor mover 20 has a connector 80 at the other end away from the fixed end 10b. The linear motor 100 includes an elastic element 50, which extends along the axial direction of the linear motor 100. One end of the elastic element 50 is connected to the connector 80, and the other end is connected to the non-fixed end 10a.

[0046] The elastic element 50 can refer to a component with elastic function, which can be, but is not limited to, a spring, a sheet, or a rubber column, etc.

[0047] refer to Figure 1 and Figure 7 The linear motor 100 has its stator 10 located on the outer side and its rotor 20 located on the inner side. The elastic element 50 can be arranged on the outer side of the rotor 20. Optionally, there can be multiple elastic elements 50, spaced circumferentially around the rotor 20. Optionally, the elastic element 50 can be a large-diameter annular component, arranged around the rotor 20, and spaced apart from the outer surface of the rotor 20.

[0048] refer to Figure 2 and Figure 8 The motor mover 20 of the linear motor 100 can be located on the outer side, the motor stator 10 on the inner side, and the elastic element 50 can be arranged on the outer side of the piston rod 402. Optionally, there can be multiple elastic elements 50, which are arranged circumferentially around the piston rod 402. Optionally, the elastic element 50 can be a large-diameter annular component (e.g., a large-diameter spring) arranged around the piston rod 402 and with a gap between it and the outer surface of the piston rod 402.

[0049] In the above technical solution, the elastic element 50 is connected in series between the hydraulic damping element 40 and the motor stator 10. This allows for further distribution of damping force according to road conditions, further optimizing the active damping of the linear motor 100 and the passive damping of the hydraulic and elastic elements 50, thus achieving effective and flexible damping and long-term stable operation of the electromagnetic vibration damping system. Alternatively, removing the hydraulic damping element 40, i.e., combining the elastic element 50 and the linear motor 100, can also achieve active damping of the linear motor 100 and passive damping of the elastic element 50, further reducing the manufacturing cost of the electromagnetic vibration damping system.

[0050] In some embodiments of the present invention, such as Figure 9 and Figure 10 As shown, the motor stator 10 has a fixed end 10b and a non-fixed end 10a. The motor mover 20 has a connector 80 at the other end away from the fixed end 10b. The linear motor 100 includes an elastic element 50, which extends along the axial direction of the linear motor 100. The elastic element 50 is located outside the outermost one of the motor stator 10 and the motor mover 20. One end of the elastic element 50 is connected to the connector 80, and the other end is connected to the fixed end 10b.

[0051] refer to Figure 1 and Figure 9 The linear motor 100 has its stator 10 located on the outer side, its mover 20 on the inner side, and its elastic element 50 located on the outer side of the stator 10. Optionally, there can be multiple elastic elements 50, which are spaced apart circumferentially around the stator 10. Optionally, the elastic element 50 can be a large-diameter annular component, arranged around the stator 10, and spaced apart from the outer surface of the stator 10.

[0052] refer to Figure 2 and Figure 10 The linear motor 100 can have its motor mover 20 located on the outer side, its motor stator 10 on the inner side, and its elastic element 50 located on the outer side of the motor mover 20. Optionally, there can be multiple elastic elements 50, which are spaced apart circumferentially around the motor mover 20. Optionally, the elastic element 50 can be a large-diameter annular component (e.g., a large-diameter spring) arranged around the motor mover 20, with a gap between it and the outer surface of the motor mover 20.

[0053] In the above technical solution, the elastic element 50 is connected in parallel to the outside of the linear motor 100, with one end connected to the fixed end 10b of the motor stator 10 and the other end connected to the connector 80. This allows for the distribution of damping forces between the linear motor 100 and the hydraulic damper 40 when the vehicle chassis is suspended, optimizing the active damping of the linear motor 100 and the passive damping of the elastic element 50 and hydraulic damper 40, thus achieving effective and flexible damping and long-term stable operation of the electromagnetic damping system. Alternatively, removing the hydraulic damper 40, i.e., combining the elastic element 50 and the linear motor 100, can also achieve active damping of the linear motor 100 and passive damping of the elastic element 50, further reducing the manufacturing cost of the electromagnetic damping system.

[0054] In some embodiments of the present invention, such as Figures 11 to 14 As shown, the linear motor 100 includes a heat exchange component 60, which is fitted together with the motor stator 10 to exchange heat with the motor stator 10. The motor stator 10 has an annular side that fits into the heat exchange component 60, and the heat exchange component 60 and the annular side are in circumferential contact.

[0055] The heat exchange component 60 can refer to a device capable of temperature regulation, which can achieve heating or cooling by exchanging heat with the motor stator 10. For example, the heat exchange component 60 can be a cooling device. The heat exchange medium of the heat exchange component 60 can be, but is not limited to, a gaseous medium or a liquid medium, etc. The heat exchange component 60 has internal heat exchange channels, the shape of which can be serpentine along the axial or radial direction according to cooling requirements. One end of the heat exchange component 60 is provided with a heat exchange medium inlet 60a and a heat exchange medium outlet 60b (see reference). Figure 11 and Figure 13 ( ), which can be used to introduce or discharge heat exchange medium.

[0056] In the above technical solution, the temperature control of the motor stator 10 by the heat exchange component 60 can effectively improve the continuous working thrust of the linear motor 100 and reduce the size of the motor, thereby realizing the miniaturization and weight reduction of the vehicle electromagnetic suspension.

[0057] In some embodiments of the present invention, such as Figure 11 and Figure 12 As shown, the motor stator 10 is located outside the motor rotor 20, and the heat exchange component 60 is cylindrical and sleeved on the outer surface of the motor stator 10. By setting the heat exchange component 60 to be annular and in close contact with the outer surface of the motor stator 10, the heat exchange surface can be increased and the heat exchange effect can be improved.

[0058] In some embodiments of the present invention, such as Figure 13 and Figure 14As shown, the motor stator 10 is located inside the motor mover 20, and the heat exchange component 60 is cylindrical and fitted inside the inner surface of the motor stator 10. By making the heat exchange component 60 cylindrical and fitting it to the inner surface of the motor stator 10, the heat exchange surface can be increased, improving the heat exchange effect. On the other hand, the hollow hole of the motor stator 10 can be fully utilized, which is beneficial to improving the structural compactness of the linear motor 100, thereby further enhancing the miniaturization design.

[0059] Furthermore, in the example where the motor stator 10 is located inside the motor rotor 20, and the heat exchange component 60 is cylindrical and fitted inside the inner surface of the motor stator 10, one end of the heat exchange component 60 may be provided with a heat exchange medium inlet pipe 601 and a heat exchange medium outlet pipe. The lengths of the heat exchange medium inlet pipe and the heat exchange medium outlet pipe inside the heat exchange component 60 may be different, facilitating internal heat exchange medium circulation and better achieving the cooling purpose. In addition, the shape of the heat exchange channel can also be spirally distributed along the axial direction according to the cooling requirements.

[0060] According to an embodiment of the present invention, a vehicle electromagnetic suspension includes a linear motor 100 as described in any of the preceding embodiments.

[0061] According to an embodiment of the present invention, the use of the linear motor 100 in the vehicle electromagnetic suspension can reduce the size and weight of the vehicle electromagnetic suspension, and also help to reduce the manufacturing cost of the vehicle electromagnetic suspension.

[0062] Other configurations and operations of the vehicle electromagnetic suspension according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0063] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0064] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A linear motor, characterized in that, include: The motor stator and the motor mover are cylindrical, and the axial length of the motor mover is greater than the axial length of the motor stator. A guide assembly is disposed between the motor stator and the motor mover to allow the motor stator and the motor mover to be slidably connected. The guide assembly includes a slider, a fixing member, and a guide rail. The slider and the guide rail are slidably connected. The slider is disposed on the motor stator. The fixing member is disposed at both ends of the motor stator to fix the slider. The guide rail is disposed on the motor mover.

2. The linear motor according to claim 1, characterized in that, The fastener is ring-shaped and is fixedly connected to the end of the motor stator.

3. The linear motor according to claim 2, characterized in that, There is one guide rail, and one or more sliders are provided on the guide rail.

4. The linear motor according to claim 2, characterized in that, There are multiple guide rails, the number of which is even and two are arranged symmetrically along the radial direction of the motor stator, or the number of which is odd and they are arranged at equal intervals along the circumference of the motor stator. Each guide rail is provided with one or more sliders.

5. The linear motor according to any one of claims 1 to 4, characterized in that, The motor stator includes a stator core and windings, the windings being disposed on the stator core, and the slider and the fixing member being disposed on the stator core; the motor mover includes a mover core and a mover magnet, the mover core being cylindrical, the guide rail being disposed on the mover core, and the mover magnet being disposed on the side of the mover core where the guide rail is disposed, in the radial direction of the motor mover; The motor stator is located outside the motor mover, and the maximum outer diameter of the assembly formed by the motor mover, the guide rail, and the mover magnet is smaller than the inner diameter of the motor stator; or, the motor stator is located inside the motor mover, and the minimum inner diameter of the assembly formed by the motor mover, the guide rail, and the mover magnet is larger than the outer diameter of the motor stator.

6. The linear motor according to claim 1, characterized in that, The motor stator has a fixed end, and the motor mover has a connecting member at the other end away from the fixed end. The linear motor includes a hydraulic damping component, which is disposed in a hollow hole on the inner side of one of the motor stator and the motor mover. The hydraulic damping component includes a hydraulic damping body and a piston rod, which is telescopically disposed on the hydraulic damping body, and one end of the piston rod is connected to the connecting member.

7. The linear motor according to any one of claims 1 to 4 and 6, characterized in that, The motor stator has a fixed end and a non-fixed end. The motor mover has a connecting member at the other end away from the fixed end. The linear motor includes an elastic member that extends along the axial direction of the linear motor. One end of the elastic member is connected to the connecting member, and the other end is connected to the non-fixed end.

8. The linear motor according to any one of claims 1 to 4 and 6, characterized in that, The motor stator has a fixed end and a non-fixed end. The motor mover has a connecting member at the other end away from the fixed end. The linear motor includes an elastic member that extends along the axial direction of the linear motor. The elastic member is located outside the outermost one of the motor stator and the motor mover. One end of the elastic member is connected to the connecting member, and the other end is connected to the fixed end.

9. The linear motor according to any one of claims 1 to 4 and 6, characterized in that, The linear motor includes a heat exchange component, which is fitted together with the motor stator to exchange heat with the motor stator. The motor stator has an annular side that fits into the heat exchange component, and the heat exchange component and the annular side are circumferentially fitted together.

10. The linear motor according to claim 9, characterized in that, The motor stator is located on the outside of the motor mover, and the heat exchange component is cylindrical and sleeved on the outer side of the motor stator; or, the motor stator is located on the inside of the motor mover, and the heat exchange component is columnar and sleeved on the inner side of the motor stator.

11. A vehicle electromagnetic suspension, characterized in that, Includes the linear motor as described in any one of claims 1 to 10.

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