Center rod, stator, linear motor, electromagnetic suspension system and vehicle

Abstract

The utility model discloses a center rod, stator, linear motor, electromagnetic suspension system and vehicle, the center rod is used for the linear motor, the center rod comprises: a first rod section and a second rod section, the first rod section is connected with the second rod section, the second rod section is used for installing a magnetic assembly of the linear motor, and the first rod section is connected with the second rod section. And the thermal conductivity of the second rod section is greater than that of the first rod section. Therefore, by arranging the center rod on the linear motor, heat in the linear motor can be quickly dissipated to the environment outside the linear motor through the center rod on the basis of meeting the strength of the linear motor, heat dissipation of the linear motor can be effectively enhanced, the risk that the linear motor is burnt down is reduced, the service life of the linear motor is prolonged, and the service life of the linear motor is prolonged. In addition, the linear motor can exert larger power on the premise of reliable work.

Description

[0001] Cross-reference to related applications

[0002] This application is based on and claims priority to Chinese Patent Application No. 202311865003.7, filed on December 29, 2023, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This disclosure relates to the field of electric motors, and in particular to a center rod, stator, linear motor, electromagnetic suspension system, and vehicle. Background Technology

[0004] In related technologies, when existing linear motors are working, the winding coils of the magnetic components generate a large amount of heat. The heat generated by the winding coils cannot be quickly dissipated to the external environment of the linear motor, which will cause the internal temperature of the linear motor to rise rapidly, creating a risk of the winding coils burning out. This can easily lead to the linear motor burning out and reduce its service life. Utility Model Content

[0005] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, one objective of this invention is to provide a center rod for linear motors, which can effectively enhance the heat dissipation of the linear motor and reduce the risk of the linear motor burning out.

[0006] This utility model further proposes a stator.

[0007] This utility model further proposes a linear motor.

[0008] This utility model further proposes an electromagnetic suspension system.

[0009] This utility model further proposes a vehicle.

[0010] According to the present invention, the center rod is used in a linear motor, and the center rod includes:

[0011] A first rod segment and a second rod segment are connected together. The second rod segment is used to install the magnetic components of the linear motor. The thermal conductivity of the second rod segment is greater than that of the first rod segment.

[0012] According to the central rod of this utility model, by setting the central rod of this application on the linear motor, while meeting the strength requirements of the linear motor, the heat inside the linear motor can be quickly dissipated to the external environment of the linear motor through the central rod, which can effectively enhance the heat dissipation of the linear motor, reduce the risk of the linear motor being burned out, extend the service life of the linear motor, and enable the linear motor to exert greater power while working reliably.

[0013] In some examples of this utility model, the structural strength of the first rod segment is greater than that of the second rod segment.

[0014] In some examples of this utility model, the first rod segment is made of a different material than the second rod segment.

[0015] In some examples of this invention, the second rod segment has a guide hole adapted to assemble the guide rod of the linear motor to guide the center rod.

[0016] In some examples of this invention, the central rod is formed with a stop portion, which is used to stop the magnetic component.

[0017] In some examples of this utility model, the stop portion is configured as a stop surface, and when the magnetic component is installed on the second rod segment, the stop surface faces the magnetic component along the axial direction of the central rod.

[0018] In some examples of this utility model, the first rod segment and the second rod segment are arranged and fixedly connected along the axial direction of the central rod, and the end face of the first rod segment facing the second rod segment is constructed as the stop portion.

[0019] In some examples of this invention, the first rod segment has a through hole communicating with the guide hole.

[0020] The stator according to this utility model includes:

[0021] A magnetic assembly, comprising a stator core and a coil, wherein the coil is connected to the stator core;

[0022] The center rod is the center rod mentioned above, and the stator core is fixed to the second rod segment.

[0023] In some examples of this utility model, the stator further includes a bearing, which is fixedly disposed in the guide hole of the second rod segment and fixedly connected to the second rod segment, and the bearing is adapted to be assembled with the guide rod of the linear motor.

[0024] The linear motor according to this utility model includes:

[0025] Stator, wherein the stator is the stator described above;

[0026] A mover having an installation space, at least a portion of the stator being assembled within the installation space, wherein the stator and the mover cooperate to allow the stator and the mover to move relative to each other along the axial direction of the central rod.

[0027] In some examples of this utility model, the magnetic component is located within the installation space, the mover has a magnet, the magnet is fixed to the inner wall of the installation space and opposite to the stator, and the magnet is arranged around the stator along the circumference of the stator.

[0028] In some examples of this invention, the mover also has a housing that defines an installation space, through which the central rod passes, such that the second rod segment is fitted into the installation space and at least a portion of the first rod segment is located outside the housing.

[0029] In some examples of this utility model, the mover also has a guide rod located within the mounting space and fixed to the housing. The guide rod extends along the axial direction of the central rod, and the guide rod and the central rod are guided to allow the stator and the mover to move relative to each other along the axial direction of the central rod.

[0030] The electromagnetic suspension system according to this utility model includes the aforementioned linear motor.

[0031] The vehicle according to this utility model is based on the electromagnetic suspension system described above.

[0032] Additional aspects and advantages of this 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

[0033] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0034] Figure 1 This is a cross-sectional view of a linear motor according to an embodiment of the present utility model;

[0035] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0036] Figure 3 This is an assembly diagram of the center rod, guide rod, and magnetic assembly according to an embodiment of the present utility model;

[0037] Figure 4 This is a schematic diagram of the center rod according to an embodiment of the present utility model;

[0038] Figure 5 yes Figure 4 Enlarged view of section B in the middle.

[0039] Figure label:

[0040] Center rod 100;

[0041] First segment 10; Through hole 11;

[0042] Second rod segment 20; guide hole 21;

[0043] Stop portion 30; Stop surface 31;

[0044] Stator 200; Magnetic assembly 201; Stator core 202; Coil 203; Bearing 204;

[0045] 300; 301; 302;

[0046] Housing 303; First end wall 3031; Second end wall 3032; Connecting side wall 3033; Assembly hole 3034;

[0047] Guide rod 304;

[0048] Linear motor 400. Detailed Implementation

[0049] The embodiments of this utility model 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 this utility model, and should not be construed as limiting this utility model.

[0050] The following is for reference. Figures 1-5 This application describes a central rod 100 according to an embodiment of the present invention. The central rod 100 is used in a linear motor 400, and this application uses the application of the linear motor 400 in a vehicle as an example. The linear motor 400 includes a stator 200 and a mover 300. The central rod 100 can be the structure of the stator 200. The mover 300 can be provided with a magnet 302. The stator 200 can be provided with a magnetic component 201. The magnetic component 201 includes a stator core 202 and a coil 203 (i.e., a winding coil 203). The winding coil 203 is mounted on the stator core 202, and the stator core 202 can be mounted on the central rod 100. Alternatively, the magnetic component 201 includes an electromagnet or a permanent magnet. This application uses the magnetic component 201 including a stator core 202 and a coil 203 as an example for description. The magnet 302 of the mover 300 and the magnetic component 201 of the stator 200 cooperate to drive the stator 200 and the mover 300 to move relative to each other along the axial direction of the central rod 100.

[0051] The linear motor 400 is a type of motor that moves through the interaction of magnetic fields. The magnet 302 generates a fixed excitation magnetic field. When a current with varying frequency is passed through the winding coil 203, a waveform-changing armature magnetic field is generated in the winding coil 203 and the stator core 202. The interaction between the excitation magnetic field and the armature magnetic field causes the stator 200 and the mover 300 to move relative to each other along the axial direction of the central rod 100. The axial direction of the central rod 100 is parallel to the axial direction of the linear motor 400. That is, when the linear motor 400 moves at a certain frequency... Figure 1 When placed in the center direction, the axial direction of the linear motor 400 is Figure 1 In the Z direction. By adjusting the current state supplied to the winding coil 203, the motion state between the stator 200 and the mover 300 is changed accordingly.

[0052] like Figures 1-5 As shown, the center rod 100 according to an embodiment of the present invention includes: a first rod segment 10 and a second rod segment 20, the first rod segment 10 and the second rod segment 20 are connected, the second rod segment 20 is used to install the magnetic component 201 of the linear motor 400, and the thermal conductivity of the second rod segment 20 is greater than that of the first rod segment 10.

[0053] The first rod segment 10 and the second rod segment 20 are fixedly connected. The first rod segment 10 and the second rod segment 20 can be directly connected, or they can be connected through a heat-conducting component. This application uses a direct connection of the first rod segment 10 and the second rod segment 20 as an example. For instance, the first rod segment 10 and the second rod segment 20 can be snap-fitted together, bolted together, or welded together. The second rod segment 20 is used to mount the magnetic component 201 of the linear motor 400. The stator core 202 of the magnetic component 201 is suitable for mounting on the second rod segment 20. Heat can be conducted between the stator core 202 and the second rod segment 20. The thermal conductivity of the second rod segment 20 is greater than that of the first rod segment 10, thus making the thermal conductivity of the second rod segment 20 superior to that of the first rod segment 10.

[0054] It should be noted that the winding coil 203 is made of resistive wire. When current is passed through it, a magnetic field is generated, which will inevitably produce Joule heat. At the same time, according to the law of electromagnetic induction, the stator core 202, winding coil 203 and other conductors of the linear motor 400 will generate induced current in the changing magnetic field, which will also generate some Joule heat. That is, when the linear motor 400 is working, the area of ​​the winding coil 203 will continuously generate heat. If this heat cannot be quickly dissipated to the outside of the linear motor 400, the temperature of the area of ​​the winding coil 203 will rise rapidly, causing the insulation layer outside the winding coil 203 to burn out, resulting in insulation failure, which can easily lead to the burnout of the linear motor 400.

[0055] The first segment 10 of the central rod 100 in this application is a load-bearing segment and also has a heat-conducting function. The first segment 10 is connected to an external adapter of the linear motor 400, and the power of the relative motion of the linear motor 400 is ultimately transmitted to the adapter through the central rod 100. The second segment 20 is a heat-conducting segment and also has a heat-conducting function.

[0056] Specifically, when current flows through the winding coil 203, the heat generated by the winding coil 203 is rapidly transferred through the stator core 202 to the second rod segment 20. The heat on the second rod segment 20 is then rapidly conducted to the first rod segment 10, and finally to the outside of the linear motor 400, allowing the motor to operate reliably while delivering greater power. In this application, by setting the first rod segment 10 and the second rod segment 20, the heat inside the linear motor 400 can be rapidly conducted to the outside of the linear motor 400 through the central rod 100. This effectively enhances the heat dissipation of the linear motor 400, reduces the risk of the external insulation layer of the winding coil 203 being burned, reduces the risk of the linear motor 400 being burned out, and extends the service life of the linear motor 400. Thus, while meeting the strength requirements of the linear motor 400, the heat dissipation capacity of the linear motor 400 is enhanced.

[0057] Therefore, by setting the center rod 100 of this application on the linear motor 400, while satisfying the strength of the linear motor 400, the heat inside the linear motor 400 can be quickly dissipated to the external environment of the linear motor 400 through the center rod 100. This can effectively enhance the heat dissipation of the linear motor 400, reduce the risk of the linear motor 400 being burned out, extend the service life of the linear motor 400, and enable the linear motor 400 to exert greater power while working reliably.

[0058] In some embodiments of this utility model, the structural strength of the first rod segment 10 is greater than that of the second rod segment 20. The first rod segment 10 and the second rod segment 20 can be made of metal parts, or they can be made of metal alloy parts. Since the first rod segment 10 is connected to the external adapter of the linear motor 400, by setting the structural strength of the first rod segment 10 to be greater than that of the second rod segment 20, the central rod 100 is given sufficient structural strength while meeting heat dissipation requirements. This improves the support reliability of the central rod 100 and ensures that the linear motor 400 has sufficient strength, thus enhancing its operational reliability.

[0059] In some embodiments of this utility model, the manufacturing materials of the first segment 10 and the second segment 20 are different. The first segment 10 can be made of a high-strength material, such as high-strength structural steel or titanium alloy. This high-strength material provides sufficient structural strength, ensuring the first segment 10 meets support requirements while also providing thermal conductivity, allowing heat from the second segment 20 to be quickly dissipated to the outside of the linear motor 400. The second segment 20 can be made of a high-thermal-conductivity material, such as copper-based alloy or graphene composite material. This improves the thermal conductivity of the second segment 20, allowing heat from the stator core 202 to be quickly conducted to the second segment 20, and vice versa, thus rapidly transferring heat to the outside of the linear motor 400 and improving its heat dissipation. By using different materials for the first segment 10 and the second segment 20, the heat conduction requirements of the central rod 100 can be met while ensuring sufficient structural strength.

[0060] In some embodiments of this utility model, such as Figure 1 and Figure 3 As shown, the second rod segment 20 has a guide hole 21, which is adapted to mount the guide rod 304 of the linear motor 400 to guide the center rod 100. The second rod segment 20 is also adapted to exchange heat with the guide rod 304.

[0061] In this configuration, the guide hole 21 can penetrate the second rod segment 20 along the axial direction of the central rod 100. The guide rod 304 of the linear motor 400 is part of the structure of the mover 300. The guide rod 304 is assembled in the guide hole 21, and one end of the guide rod 304 can extend into the guide hole 21. When the guide rod 304 extends into the guide hole 21, the second rod segment 20 and the guide rod 304 cooperate in a guiding manner, so that the stator 200 and the mover 300 move relative to each other along the axial direction of the central rod 100, thereby reducing the risk of jamming between the stator 200 and the mover 300, and thus enabling the stator 200 and the mover 300 to move relative to each other smoothly.

[0062] Furthermore, the second rod segment 20 is suitable for heat exchange with the guide rod 304. For example, the second rod segment 20 and the guide rod 304 can exchange heat through contact, or a heat-conducting element can be provided between the second rod segment 20 and the guide rod 304 to conduct heat between them. When current is applied to the winding coil 203, the heat generated by the winding coil 203 is quickly transferred to the second rod segment 20 through the stator core 202. The heat on the second rod segment 20 is then quickly conducted to the first rod segment 10 and the guide rod 304. The heat can be quickly conducted to the outside of the linear motor 400 through the first rod segment 10, and also to the mover 300 through the guide rod 304. This achieves the effect of simultaneously dissipating the heat inside the linear motor 400 to the outside through the first rod segment 10 and the mover 300, thereby improving the heat dissipation capacity of the linear motor 400.

[0063] In some embodiments of this utility model, such as Figures 2-5 As shown, the center rod 100 can have a stop portion 30, which is used to stop the magnetic assembly 201. The stop portion 30 can be formed on the first rod segment 10 or on the second rod segment 20; this application uses the example of the stop portion 30 being formed on the first rod segment 10 for illustration. The stop portion 30 can be a surface structure or a boss structure, but this utility model is not limited to these, as long as the stop portion 30 can perform a stopping function. During the assembly of the stator core 202 of the magnetic assembly 201 into the second rod segment 20, after the stop portion 30 and the stator core 202 abut, the stop portion 30 can limit the stator core 202 along the axial direction of the center rod 100, stopping the stator core 202, facilitating the installation of the stator core 202 into place, thereby improving the assembly efficiency of the stator core 202 and the center rod 100, and thus improving the production efficiency of the linear motor 400.

[0064] In some embodiments of this utility model, such as Figures 2-5 As shown, the stop portion 30 is configured with a stop surface 31. When the magnetic component 201 is installed on the second rod segment 20, the stop surface 31 faces the magnetic component 201 along the axial direction of the central rod 100. The stop surface 31 can be a plane. When the stator 200 core of the magnetic component 201 is installed on the second rod segment 20, it faces the magnetic component 201 along the axial direction of the central rod 100 via the stop surface 31, facilitating the stop portion 30 and the stator 200 core to stop and limit their movement.

[0065] In some embodiments of this utility model, such as Figures 2-5 As shown, the first rod segment 10 and the second rod segment 20 are arranged and fixedly connected along the axial direction of the central rod 100, and the end face of the first rod segment 10 facing the second rod segment 20 is constructed with a stop portion 30.

[0066] In this configuration, the first rod segment 10 and the second rod segment 20 are arranged sequentially along the axial direction of the central rod 100. The first rod segment 10 and the second rod segment 20 are fixedly connected. The cross-sectional area of ​​the first rod segment 10 is larger than that of the second rod segment 20. After the first rod segment 10 and the second rod segment 20 are connected, the end face of the first rod segment 10 facing the second rod segment 20 is exposed along the axial direction of the central rod 100. The exposed end face is a stop portion 30. In this embodiment, the stop portion 30 is a stop surface 31. By constructing the stop portion 30 on the end face of the first rod segment 10 facing the second rod segment 20, when the stator core 202 is assembled from the side of the second rod segment 20 away from the first rod segment 10, the stop portion 30 easily stops the stator core 202, thereby facilitating the installation of the stator core 202.

[0067] In some embodiments of this utility model, such as Figure 3 and Figure 4 As shown, the first rod segment 10 has a through hole 11 communicating with the guide hole 21. The through hole 11 extends through the first rod segment 10 along the axial direction of the central rod 100, and one end of the through hole 11 communicates with the guide hole 21. Heat from the first rod segment 10 and the second rod segment 20 can be conducted to the guide hole 21 and the through hole 11. When the linear motor 400 operates, and the guide rod 304 moves along the axial direction of the central rod 100 within the guide hole 21, the pushing action of the guide rod 304 helps to increase the gas flow rate within the guide hole 21 and the through hole 11, thereby rapidly dissipating heat from both the guide hole 21 and the through hole 11, further enhancing the heat dissipation capacity of the linear motor 400.

[0068] Furthermore, the cross-sectional shape of the guide hole 21 is the same as that of the through hole 11, and the cross-sectional area of ​​the guide hole 21 is the same as that of the through hole 11. The central axis of the guide hole 21 and the central axis of the through hole 11 are collinear. This arrangement can prevent the guide rod 304 from hitting the first rod segment 10 when it moves along the axial direction of the central rod 100 in the guide hole 21, thus extending the service life of the linear motor 400.

[0069] like Figure 3As shown, according to an embodiment of the present invention, the stator 200 has the structure of a linear motor 400 and includes a magnetic component 201 and a central rod 100. The magnetic component 201 is the same as in the above embodiment, comprising a stator core 202 and a coil 203, with the coil 203 connected to the stator core 202. The central rod 100 is the same as in the above embodiment. The stator core 202 is fixed to the second rod segment 20. The stator core 202 can be sleeved on the outside of the second rod segment 20, snapped onto the second rod segment 20, or adhered to the second rod segment 20, or bolted to the second rod segment 20.

[0070] By providing the center rod 100 of this application in the stator 200, while meeting the strength requirements of the linear motor 400, the heat inside the linear motor 400 can be quickly dissipated to the external environment through the center rod 100. This can effectively enhance the heat dissipation of the linear motor 400, reduce the risk of the linear motor 400 being burned out, extend the service life of the linear motor 400, and enable the linear motor 400 to exert greater power while operating reliably.

[0071] In some embodiments of this utility model, such as Figure 2 and Figure 3 As shown, the stator 200 may further include a bearing 204, which is fixedly disposed in the guide hole 21 of the second rod segment 20 and fixedly connected to the second rod segment 20. The bearing 204 is adapted to be assembled with the guide rod 304 of the linear motor 400.

[0072] The bearing 204 is fixedly installed in the guide hole 21 of the second rod segment 20. The bearing 204 is fixedly connected to the second rod segment 20, and the bearing 204 and the second rod segment 20 can be connected by snap-fit, bolt, or adhesive. The guide rod 304 of the linear motor 400 can pass through the bearing 204, and the guide rod 304 and the bearing 204 can slide relative to each other along the axial direction of the central rod 100. Through the sliding engagement of the guide rod 304 and the bearing 204, a guiding and positioning function can be achieved, thereby allowing the stator 200 and the mover 300 to move relative to each other along the axial direction of the central rod 100.

[0073] like Figure 1 and Figure 2As shown, the linear motor 400 according to an embodiment of the present invention includes a stator 200 and a mover 300. The stator 200 is the same as the stator 200 in the above embodiment. The mover 300 is the same as the mover 300 in the above embodiment. The mover 300 has a mounting space 301, and at least a portion of the stator 200 is assembled in the mounting space 301. The stator 200 and the mover 300 cooperate to allow the stator 200 and the mover 300 to move relative to each other along the axial direction of the central rod 100.

[0074] The mover 300 defines the mounting space 301, and at least a portion of the stator 200 is assembled within the mounting space 301. That is, a portion of the stator 200 structure is assembled within the mounting space 301, or the entire structure of the stator 200 is assembled within the mounting space 301. When the linear motor 400 operates, the stator 200 and the mover 300 work in magnetic cooperation, allowing the stator 200 and the mover 300 to move relative to each other along the axial direction of the central rod 100, thus enabling the linear motor 400 to meet its operational requirements.

[0075] Furthermore, the heat inside the linear motor 400 can be quickly dissipated to the external environment through the central rod 100, which can effectively enhance the heat dissipation of the linear motor 400, reduce the risk of the linear motor 400 being burned out, extend the service life of the linear motor 400, and enable the linear motor 400 to exert greater power while working reliably.

[0076] In some embodiments of this utility model, such as Figure 1 and Figure 2 As shown, the magnetic component 201 is located in the installation space 301, and the mover 300 has a magnet 302. The magnet 302 is fixed to the inner wall of the installation space 301 and is opposite to the stator 200. The magnet 302 is arranged around the stator 200 along the circumference of the stator 200.

[0077] The magnetic component 201 is assembled inside the mounting space 301, and the magnet 302 is also assembled inside the mounting space 301. The magnet 302 is fixed to the inner wall of the mounting space 301. For example, the magnet 302 can be pasted onto the inner wall of the mounting space 301, embedded in the inner wall of the mounting space 301, or bolted to the inner wall of the mounting space 301. Along the radial direction of the linear motor 400, or more specifically, along the radial direction of the central rod 100, the magnet 302 is positioned opposite to the magnetic component 201 of the stator 200, and spaced apart from it. The magnet 302 can be a ring structure, arranged around the magnetic component 201 of the stator 200 along the circumference of the stator 200. By positioning the magnet 302 opposite to and surrounding the stator 200, it is easier for the magnet 302 to work in conjunction with the magnetic components 201 of the stator 200, thereby improving the working reliability of the linear motor 400. In addition, it also makes the linear motor 400 more compact, which helps to reduce the size of the linear motor 400.

[0078] In some embodiments of this utility model, such as Figure 1 and Figure 2 As shown, the mover 300 also has a housing 303 that defines an installation space 301, through which the center rod 100 passes to the housing 303 so that the second rod segment 20 is fitted into the installation space 301 and at least a portion of the first rod segment 10 is located outside the housing 303.

[0079] The housing 303 defines the installation space 301. Along the axial direction of the linear motor 400, the housing 303 has a first end wall 3031 and a second end wall 3032 that are opposite to each other and spaced apart. The housing 303 also has a connecting side wall 3033, which connects between the first end wall 3031 and the second end wall 3032. The connecting side wall 3033, the first end wall 3031, and the second end wall 3032 together define the installation space 301. The first end wall 3031 has a mounting hole 3034 through which the center rod 100 passes, allowing the second rod segment 20 to be mounted in the installation space 301. This facilitates the mounting of the magnetic component 201 in the installation space 301 onto the second rod segment 20. Furthermore, during the relative movement of the stator 200 and the mover 300, the mounting hole 3034 can guide the center rod 100, allowing the stator 200 and the mover 300 to move smoothly relative to each other. The center rod 100 passes through the mounting hole 3034, which also allows at least a portion of the first rod segment 10 to be located outside the housing 303, thereby facilitating the assembly of the first rod segment 10 with the adapter and also helping to dissipate heat from the center rod 100 to the external environment, thus improving the heat dissipation performance of the linear motor 400.

[0080] In some embodiments of this utility model, such as Figure 1 and Figure 2 As shown, the mover 300 may also have a guide rod 304, which is located in the mounting space 301 and fixed to the housing 303. The guide rod 304 extends along the axial direction of the central rod 100, and the guide rod 304 and the central rod 100 are guided to cooperate so that the stator 200 and the mover 300 can move relative to each other along the axial direction of the central rod 100.

[0081] The guide rod 304 is located within the installation space 301. The guide rod 304 can be fixed to the second end wall 3032 of the outer casing 303, and can be integrally formed with the second end wall 3032. Alternatively, the guide rod 304 can be bolted to the second end wall 3032. The guide rod 304 extends along the axial direction of the central rod 100. The central rod 100 has a guide hole 21 and a through hole 11, which are arranged sequentially and adjacent to each other along the axial direction of the central rod 100, and are connected. The cross-sectional shape of the guide rod 304 matches the cross-sectional shape of the guide hole 21. The guide rod 304 is assembled within the guide hole 21, and through the guiding engagement between the guide rod 304 and the guide hole 21, the guide rod 304 and the central rod 100 are guided together. Under the guiding action of the guide rod 304 and the guide hole 21, the stator 200 and the mover 300 move relative to each other along the axial direction of the central rod 100.

[0082] Furthermore, the end of the connecting side wall 3033 facing the second end wall 3032 is an open end. The second end wall 3032 and the connecting side wall 3033 are detachably connected. The second end wall 3032 is an end cap structure, used to open or close the open end of the connecting side wall 3033 facing the second end wall 3032. The stator 200 is assembled in the mounting space 301 through the open end of the connecting side wall 3033 facing the second end wall 3032. After the stator 200 is assembled, the second end wall 3032 and the connecting side wall 3033 are fixedly connected, and the second end wall 3032 closes the open end of the connecting side wall 3033 facing the second end wall 3032, thus completing the assembly of the linear motor 400.

[0083] The electromagnetic suspension system according to an embodiment of the present invention includes the linear motor 400 described above. The heat within the linear motor 400 can be quickly dissipated to the external environment through the central rod 100, effectively enhancing heat dissipation, reducing the risk of burnout, extending the service life of the linear motor 400, and enabling the linear motor 400 to exert greater power while operating reliably, thereby improving the performance of the electromagnetic suspension system.

[0084] The vehicle according to the present invention includes the electromagnetic suspension system described in the above embodiments, thereby improving the vehicle's performance.

[0085] 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 present 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.

[0086] Although embodiments of the present 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 present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A central rod, characterized in that, The central rod is used for a linear motor, and the central rod includes: A first rod segment and a second rod segment are connected together. The second rod segment is used to install the magnetic components of the linear motor. The thermal conductivity of the second rod segment is greater than that of the first rod segment.

2. The center rod according to claim 1, characterized in that, The structural strength of the first segment is greater than that of the second segment.

3. The center rod according to claim 1, characterized in that, The first segment is made of a different material than the second segment.

4. The center rod according to claim 1, characterized in that, The second rod segment has a guide hole adapted to assemble the guide rod of the linear motor to guide the center rod.

5. The center rod according to claim 1, characterized in that, The central rod has a stop portion, which is used to stop the magnetic component.

6. The center rod according to claim 5, characterized in that, The stop portion is configured as a stop surface, and when the magnetic component is installed on the second rod segment, the stop surface faces the magnetic component along the axial direction of the central rod.

7. The center rod according to claim 5, characterized in that, The first rod segment and the second rod segment are arranged and fixedly connected along the axial direction of the central rod, and the end face of the first rod segment facing the second rod segment is constructed as the stop portion.

8. The center rod according to claim 4, characterized in that, The first rod segment has a through hole that communicates with the guide hole.

9. A stator, characterized in that, include: A magnetic assembly, comprising a stator core and a coil, wherein the coil is connected to the stator core; The center rod is the center rod according to any one of claims 1-8, and the stator core is fixed to the second rod segment.

10. The stator according to claim 9, characterized in that, Also includes: The bearing is fixedly disposed in the guide hole of the second rod segment and fixedly connected to the second rod segment. The bearing is adapted to be assembled with the guide rod of the linear motor.

11. A linear motor, characterized in that, include: Stator, wherein the stator is the stator according to claim 9 or 10; A mover having an installation space, at least a portion of the stator being assembled within the installation space, wherein the stator and the mover cooperate to allow the stator and the mover to move relative to each other along the axial direction of the central rod.

12. The linear motor according to claim 11, characterized in that, The magnetic component is located within the installation space. The mover has a magnet, which is fixed to the inner wall of the installation space and opposite to the stator. The magnet is arranged around the stator along the circumference of the stator.

13. The linear motor according to claim 12, characterized in that, The mover also has a housing that defines an installation space, through which the central rod passes to assemble the second rod segment within the installation space and to place at least a portion of the first rod segment outside the housing.

14. The linear motor according to claim 13, characterized in that, The mover also has a guide rod located within the mounting space and fixed to the housing. The guide rod extends along the axial direction of the central rod, and the guide rod and the central rod are guided together to allow the stator and the mover to move relative to each other along the axial direction of the central rod.

15. An electromagnetic suspension system, characterized in that, Includes the linear motor according to any one of claims 11-14.

16. A vehicle, characterized in that, Including the electromagnetic suspension system according to claim 15.

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