Linear electric motor, electromagnetic shock absorber, and vehicle

Abstract

A linear electric motor, an electromagnetic shock absorber, and a vehicle. The linear electric motor comprises: a mover assembly, a stator assembly and a first sliding bearing. The mover assembly has a housing; part of the stator assembly is disposed in the housing in the axial direction of the housing; the stator assembly comprises a stator core, and a first cavity and a second cavity are respectively provided between two axial ends of the stator core and the housing; and the first sliding bearing is arranged between the stator assembly and the mover assembly, and a first channel is provided in the first sliding bearing to increase a communication air gap between the first cavity and the second cavity.

Description

Linear motor, electromagnetic vibration absorber and vehicle

[0001] This application claims priority to Chinese patent application No. 202410395749.4, filed on March 29, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] The present disclosure relates to the technical field of motors, and in particular to a linear motor, an electromagnetic vibration absorber, and a vehicle. Background Art

[0003] A motor is an electromagnetic device that converts or transmits electrical energy based on the law of electromagnetic induction. A linear motor, as a type of motor, converts electrical energy directly into mechanical energy by moving the rotor along a stator in a straight line, without the need for an intermediate conversion mechanism.

[0004] Summary of the Invention

[0005] The present disclosure aims to solve at least one of the technical problems existing in the related art. To this end, one purpose of the present disclosure is to provide a linear motor that enables smooth relative movement between a stator assembly and a mover assembly, thereby extending service life, and is easy to manufacture and reduce production costs.

[0006] Another object of the present disclosure is to provide an electromagnetic vibration absorber having the above-mentioned linear motor.

[0007] Yet another object of the present disclosure is to provide a vehicle having the electromagnetic shock absorber.

[0008] According to some embodiments of the present disclosure, a linear motor includes: a mover assembly, a stator assembly, and a first sliding bearing. The mover assembly has a housing; a portion of the stator assembly is axially disposed within the housing; the stator assembly includes a stator core, with a first cavity and a second cavity defined between the housing and the axial ends of the stator core, respectively; the first sliding bearing is disposed between the stator assembly and the mover assembly, and is provided with at least one first channel to increase the air gap connecting the first cavity and the second cavity.

[0009] According to some embodiments of the linear motor disclosed herein, a portion of the stator assembly is arranged in the outer shell along the axial direction of the outer shell, a first cavity and a second cavity are respectively provided between the axial ends of the stator core of the stator assembly and the outer shell, a first sliding bearing is provided between the stator assembly and the mover assembly, and a first channel is opened on the first sliding bearing to increase the connecting air gap between the first cavity and the second cavity, so that airflow can flow through the air gap between the stator assembly and the mover assembly.

[0010] In addition, the first channel can be used to enable the air flow between the first cavity and the second cavity, thereby increasing the flow area of ​​the air flow between the first cavity and the second cavity, making it easier to adjust the pressure difference between the first cavity and the second cavity, so that the stator assembly and the mover assembly move more smoothly relative to each other, which is beneficial to extending the service life of the linear motor. In addition, it is more convenient to process the first channel on the first sliding bearing, and the processing is simple, which is beneficial to reducing production costs.

[0011] In addition, the linear motor according to the above embodiment of the present disclosure may also have the following additional technical features:

[0012] According to some embodiments of the linear motor disclosed herein, the housing includes: a shell body, the part of the stator assembly is arranged in the shell body along the axial direction of the shell body; a guide post, the guide post is arranged in the shell body, a guide hole is formed on the stator assembly, the guide post extends along the axial direction of the stator assembly and extends into the guide hole, the guide hole is connected to the second cavity, the first sliding bearing is arranged between the outer peripheral wall of the guide post and the hole wall of the guide hole, and the first cavity and the guide hole are connected through the at least one first channel.

[0013] According to some embodiments of the present disclosure, an opening is provided on the stator assembly, and the opening communicates with the guide hole and the second cavity.

[0014] According to some embodiments of the present disclosure, the stator assembly includes: a stator core shaft, the opening is provided on the stator core shaft; a winding, the winding is sleeved on the stator core shaft, the opening is located on the side of the winding close to the second cavity, and the linear motor also includes a conductive component, the conductive component is located in the stator core shaft and connected to the winding through the opening.

[0015] According to some embodiments of the present disclosure, the at least one first channel extends along an axial direction of the first sliding bearing.

[0016] According to some embodiments of the present disclosure, the at least one first channel includes a plurality of first channels, and the plurality of first channels are arranged at intervals along the circumference of the first sliding bearing.

[0017] According to some embodiments of the present disclosure, the plurality of first channels are grooves located on the inner peripheral wall of the first sliding bearing.

[0018] According to some embodiments of the present disclosure, the plurality of first channels include a first groove and a second groove, and the first groove and the second groove are arranged opposite to each other.

[0019] According to some embodiments of the present disclosure, the plurality of first channels are unevenly distributed along the circumference of the first sliding bearing.

[0020] According to some embodiments of the present disclosure, grease is provided in any one of the plurality of first channels, and the grease does not block any one of the first channels.

[0021] According to some embodiments of the present disclosure, one axial end of the housing is open to form an open hole, the portion of the stator assembly is passed through the open hole, and a seal is provided between the hole wall of the open hole and the outer peripheral wall of the stator assembly.

[0022] According to some embodiments of the present disclosure, a second sliding bearing is further provided between the hole wall of the open hole and the outer peripheral wall of the stator assembly, and the second sliding bearing is located on a side of the seal close to the second cavity.

[0023] According to some embodiments of the present disclosure, a fourth cavity is defined between the second sliding bearing and the sealing member, and a second channel is provided on the second sliding bearing to connect the second cavity and the fourth cavity.

[0024] According to some embodiments of the present disclosure, the second channel extends in an axial direction of the second sliding bearing.

[0025] According to some embodiments of the present disclosure, the second sliding bearing includes: a main body portion, the stator assembly is passed through the main body portion, and the second channel is provided on the main body portion; a stop portion, the stop portion is provided on the outer peripheral wall of the main body portion and extends along the circumferential direction of the main body portion, and one axial end of the stop portion is in contact with the outer shell.

[0026] According to some embodiments of the present disclosure, a boss is provided on the inner wall surface of one end of the housing where the open hole is provided, the boss surrounds the open hole, and a portion of the second sliding bearing is located between the inner circumferential wall of the boss and the outer circumferential wall of the stator assembly.

[0027] According to some embodiments of the present disclosure, a vent valve is provided on the side wall of the housing, and the vent valve is configured to perform one of the following: connecting the first cavity with the external environment; and connecting the second cavity with the external environment.

[0028] An electromagnetic vibration absorber according to some embodiments of the present disclosure includes the linear motor according to some embodiments of the present disclosure.

[0029] According to some embodiments of the electromagnetic vibration absorber disclosed herein, part of the stator assembly is arranged in the outer shell along the axial direction of the outer shell, a first cavity and a second cavity are respectively provided between the axial ends of the stator core of the stator assembly and the outer shell, a first sliding bearing is provided between the stator assembly and the mover assembly, and a first channel is opened on the first sliding bearing to increase the connecting air gap between the first cavity and the second cavity, so that airflow can flow through the air gap between the stator assembly and the mover assembly.

[0030] In addition, the first channel can be used to enable the air flow between the first cavity and the second cavity, thereby increasing the flow area of ​​the air flow between the first cavity and the second cavity, making it easier to adjust the pressure difference between the first cavity and the second cavity, so that the stator assembly and the mover assembly move more smoothly relative to each other, which is beneficial to extending the service life of the linear motor. In addition, it is more convenient to process the first channel on the first sliding bearing, and the processing is simple, which is beneficial to reducing production costs.

[0031] A vehicle according to some embodiments of the present disclosure includes the electromagnetic vibration absorber according to some embodiments of the present disclosure.

[0032] According to some embodiments of the vehicle disclosed herein, part of the stator assembly is arranged in the outer shell along the axial direction of the outer shell, a first cavity and a second cavity are respectively provided between the axial ends of the stator core of the stator assembly and the outer shell, a first sliding bearing is provided between the stator assembly and the mover assembly, and a first channel is opened on the first sliding bearing to increase the connecting air gap between the first cavity and the second cavity, so that airflow can flow through the air gap between the stator assembly and the mover assembly.

[0033] In addition, the first channel can be used to enable the air flow between the first cavity and the second cavity, thereby increasing the flow area of ​​the air flow between the first cavity and the second cavity, making it easier to adjust the pressure difference between the first cavity and the second cavity, so that the stator assembly and the mover assembly move more smoothly relative to each other, which is beneficial to extending the service life of the linear motor. In addition, it is more convenient to process the first channel on the first sliding bearing, and the processing is simple, which is beneficial to reducing production costs.

[0034] Additional aspects and advantages of the present disclosure will be given in part in the description that follows and, in part, will be obvious from the description that follows, or will be learned through practice of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The above and / or additional aspects and advantages of the present disclosure will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0036] FIG1 is a cross-sectional view of an electromagnetic vibration absorber according to some embodiments of the present disclosure, taken along an axis;

[0037] FIG2 is an enlarged view of circle A in FIG1 ;

[0038] FIG3 is an enlarged view of circle B in FIG1 ;

[0039] FIG4 is a cross-sectional view of a linear motor along its axis according to some embodiments of the present disclosure;

[0040] FIG5 is a cross-sectional view of a linear motor along its axis according to some embodiments of the present disclosure;

[0041] FIG6 is a schematic diagram of a partial structure of a linear motor according to some embodiments of the present disclosure;

[0042] FIG7 is a schematic diagram of the structure of the guide column and guide hole of the linear motor according to some embodiments of the present disclosure;

[0043] FIG8 is a schematic structural diagram of the stator assembly and the first sliding bearing of the linear motor according to some embodiments of the present disclosure;

[0044] FIG9 is a schematic structural diagram of the cooperation between the housing of the linear motor and the second sliding bearing according to some embodiments of the present disclosure;

[0045] FIG10 is a schematic structural diagram of a first sliding bearing of a linear motor according to some embodiments of the present disclosure;

[0046] FIG11 is a schematic structural diagram of a second sliding bearing of a linear motor according to some embodiments of the present disclosure;

[0047] FIG12 is a schematic structural diagram of a stator core shaft of a linear motor according to some embodiments of the present disclosure;

[0048] FIG13 is another structural schematic diagram of a first sliding bearing of a linear motor according to some embodiments of the present disclosure;

[0049] FIG14 is a block diagram of a vehicle according to some embodiments of the present disclosure.

[0050] Reference numerals:

[0051] 1000, vehicle; 100, linear motor; 200, electromagnetic vibration absorber;

[0052] 10. Mover assembly; 11. Housing; 12. Second stop member; 13. Boss; 111. Housing body; 112. Guide post; 113. Open hole; 114. Magnet;

[0053] 20. Stator assembly; 21. Guide hole; 22. Positioning member; 23. Vibration damping member; 24. First stop member; 25. Opening; 201. Stator core shaft; 202. Stator core; 211. Third through slot; 212. Mounting slot;

[0054] 31. First cavity; 32. Second cavity; 33. Third cavity; 34. Fourth cavity;

[0055] 41. First sliding bearing; 42. Second sliding bearing; 411. First channel; 421. Second channel; 422. Main body; 423. Stop portion;

[0056] 50. Seals;

[0057] 60. Vent valve;

[0058] 70, lower wishbone;

[0059] 81. First groove; 82. Second groove; 83. Third groove; 84. Fourth groove. DETAILED DESCRIPTION

[0060] The following describes in detail embodiments of the present disclosure, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present disclosure and are not to be construed as limiting the present disclosure.

[0061] In the description of the present disclosure, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present disclosure.

[0062] In the description of the present disclosure, "first feature" and "second feature" may include one or more such features, "plurality" means two or more, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them, the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and diagonally above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0063] In related technologies, linear motors consist of a rotor assembly and a stator assembly. When the rotor assembly moves axially along the stator assembly, the resistance between the stator assembly and the rotor assembly is high, increasing the linear motor's energy consumption and causing it to overheat, potentially damaging the motor and reducing its service life.

[0064] A linear motor 100 according to some embodiments of the present disclosure will be described below with reference to the accompanying drawings.

[0065] 1-3 , a linear motor 100 according to some embodiments of the present disclosure may include a mover assembly 10 and a stator assembly 20 .

[0066] In some embodiments, the mover assembly 10 has a housing 11, and part of the stator assembly 20 is arranged in the housing 11 along the axial direction of the housing 11 (for example, the up and down direction shown in Figure 1), and the stator assembly 20 includes a stator core 202, and a first cavity 31 and a second cavity 32 are respectively provided between the two axial ends of the stator core 202 and the housing 11 (for example, the up and down direction shown in Figure 1), so that the mover assembly 10 can move relatively along the axial direction of the stator assembly 20, thereby realizing the operation of the linear motor 100 and meeting the working requirements of the linear motor 100.

[0067] In addition, a first sliding bearing 41 is provided between the stator assembly 20 and the mover assembly 10. The first sliding bearing 41 can reduce the friction between the stator assembly 20 and the mover assembly 10, effectively reduce energy loss, help reduce the degree of wear, and extend the service life of the linear motor 100.

[0068] There is an air gap between the stator assembly 20 and the mover assembly 10, which facilitates the relative movement of the stator assembly 20 and the mover assembly 10. The air gap realizes the communication between the first cavity 31 and the second cavity 32, and by reducing the air gap between the stator assembly 20 and the mover assembly 10, vibration, noise and other problems can be reduced.

[0069] However, the inventors of this disclosure discovered that in related art, when the mover assembly moves axially along the stator assembly, the pressures in the first and second cavities change. Due to the small air gap between the stator assembly and the mover assembly, the flow area between the first and second cavities is reduced, which increases the resistance to the movement of the stator assembly and the mover assembly. This increases the energy consumption of the linear motor, causes the linear motor to heat up, and easily damages the linear motor, shortening its service life.

[0070] Therefore, in order to solve the problem of large resistance to mutual movement between the stator assembly 20 and the movable subassembly 10, in some embodiments of the present disclosure, as shown in Figures 7, 8, 10 and 13, a first channel 411 is provided on the first sliding bearing 41, which can increase the connecting air gap between the first cavity 31 and the second cavity 32, so that the airflow can flow through the air gap between the stator assembly 20 and the movable subassembly 10, and the airflow can flow between the first cavity 31 and the second cavity 32 through the first channel 411.

[0071] In this way, the flow area between the first cavity 31 and the second cavity 32 is increased, which is conducive to adjusting the pressure difference between the first cavity 31 and the second cavity 32, effectively improving the air pressure, and can reduce or avoid the fluctuations caused by the relative movement of the stator assembly 20 and the mover assembly 10 due to the pressure difference. It can also reduce the resistance to the mutual movement of the stator assembly 20 and the mover assembly 10. For example, the air resistance caused by the change in the volume of the first cavity 31 and the second cavity 32 during compression and extension is reduced, making the relative movement of the stator assembly 20 and the mover assembly 10 smoother, which is conducive to extending the service life of the linear motor 100.

[0072] Furthermore, it is more convenient to process the first channel 411 on the first sliding bearing 41 , which simplifies the processing and helps reduce production costs.

[0073] In some embodiments, the first channel 411 can be a through hole formed on the first sliding bearing 41, or the first channel 411 can be a through groove formed on the first sliding bearing 41 as shown in Figure 10, both of which can meet the need to increase the connecting air gap between the first cavity 31 and the second cavity 32, and have a simple structure and are easy to process and manufacture.

[0074] In some embodiments, as shown in Figures 1, 2 and 4, a magnet 114 is provided on the inner circumferential wall of the outer shell 11, and the stator assembly 20 also includes a stator core shaft 201. The stator core shaft 201 is passed through the outer shell 11, and the stator core 202 is sleeved on the stator core shaft 201, which can achieve the fixation of the stator core 202. An air gap is defined between the outer circumferential wall of the stator core 202 and the inner circumferential wall of the magnet 114, which can meet the use requirements of the linear motor 100.

[0075] In some embodiments, as shown in Figures 5-7, a limit member 22 is provided at one axial end of the stator core shaft 201 (for example, the lower end shown in Figure 1), and the limit member 22 is abutted against one axial end of the stator core 202 (for example, the lower end shown in Figure 1), which can ensure that the stator core 202 is reliably fixed on the stator core shaft 201, prevent the stator core 202 from falling off the stator core shaft 201, and ensure the working reliability of the linear motor 100.

[0076] It should be noted that, for the convenience of description, the directions such as “upper” and “lower” in the present disclosure are based on the directions shown in the accompanying drawings, and are not limitations on the directions in actual application.

[0077] In some embodiments, the first sliding bearing 41 can be integrally formed, facilitating processing and manufacturing of the first sliding bearing 41 and reducing production costs. For example, the first sliding bearing 41 can be formed by powder metallurgy sintering and pressing, and the first sliding bearing 41 can be provided with air holes. Grease is then injected into the air holes under high pressure. The grease can lubricate the stator assembly 20 and the mover assembly 10 during relative movement, allowing for smoother relative movement and effectively reducing friction. For example, the grease can be lubricating oil or grease.

[0078] According to some embodiments of the linear motor 100 disclosed herein, a portion of the stator assembly 20 is arranged in the housing 11 along the axial direction of the housing 11, and a first cavity 31 and a second cavity 32 are respectively provided between the axial ends of the stator core 202 of the stator assembly 20 and the housing 11, and a first sliding bearing 41 is provided between the stator assembly 20 and the mover assembly 10.

[0079] A first channel 411 is provided on the first sliding bearing 41 to increase the connecting air gap between the first cavity 31 and the second cavity 32, so that the air flow can flow through the air gap between the stator assembly 20 and the mover assembly 10, and the flow between the first cavity 31 and the second cavity 32 can be realized through the first channel 411, thereby increasing the flow area between the first cavity 31 and the second cavity 32, facilitating the adjustment of the pressure difference between the first cavity 31 and the second cavity 32, so that the stator assembly 20 and the mover assembly 10 move more smoothly with respect to each other, which is beneficial to extending the service life of the linear motor 100, and processing the first channel 411 on the first sliding bearing 41 is more convenient and simple, which is beneficial to reducing production costs.

[0080] In some embodiments of the present disclosure, as shown in Figures 1 to 3, the outer shell 11 includes a shell body 111 and a guide column 112. Part of the stator assembly 20 is arranged in the shell body 111 along the axial direction of the shell body 111 (for example, the up and down direction shown in Figure 1). The guide column 112 is arranged in the shell body 111. A guide hole 21 is formed on the stator assembly 20. The guide column 112 extends along the axial direction of the stator assembly 20 and extends into the guide hole 21, so that a third cavity 33 can be defined between the guide column 112 and the guide hole 21.

[0081] Therefore, when the stator assembly 20 and the movable assembly 10 move relative to each other, the cooperation between the guide hole 21 and the guide rod can play a guiding and limiting role in the movement of the guide rod, thereby ensuring the coaxiality of the stator assembly 20 and the movable assembly 10, ensuring that the guide rod moves along the set direction and set trajectory, and preventing the guide rod from separating from the stator assembly 20 during the sliding process, so that the guide rod can play a guiding role in the movement of the movable assembly 10.

[0082] 5-7 , a first sliding bearing 41 is disposed between the outer peripheral wall of the guide column 112 and the wall of the guide hole 21 , so that when the guide rod slides in the guide hole 21 , the friction between the guide rod and the wall of the guide hole 21 can be reduced through the first sliding bearing 41 , thereby reducing the degree of wear and extending the service life of the linear motor 100 .

[0083] In addition, as shown in Figures 4 to 6, the guide hole 21 is connected to the second cavity 32, and the first cavity 31 and the guide hole 21 are connected through the first channel 411, that is, the airflow in the first cavity 31 can flow to the guide hole 21 through the first channel 411, and then flow to the second cavity 32 through the guide hole 21. Alternatively, the airflow in the second cavity 32 can flow from the first channel 411 to the first cavity 31 through the guide hole 21, so that the first cavity 31 and the second cavity 32 are connected, meeting the required connection requirements, so that the airflow can flow from both the radial inside and the radial outside of the stator assembly 20, increasing the flow area, and reducing the resistance to the mutual movement of the stator assembly 20 and the mover assembly 10, so that the stator assembly 20 and the mover assembly 10 move more smoothly, and are easy to process and manufacture, which is conducive to reducing the production cost of the linear motor 100.

[0084] In some embodiments, to meet the coaxiality requirements of the linear motor 100, it is necessary to reduce the clearance between the guide post 112 and the first sliding bearing 41. When the guide post 112 and the first sliding bearing 41 are mated, due to friction between them, for example, when the load is large or the axial movement speed of the mover assembly 10 along the stator assembly 20 is high, the temperature of the guide post 112 and the first sliding bearing 41 increases, causing both the first sliding bearing 41 and the guide post 112 to heat and expand, which can easily lead to an interference fit between the guide post 112 and the first sliding bearing 41.

[0085] Therefore, as shown in Figures 7 and 8, the first channel 411 is provided on the first sliding bearing 41, so that the airflow in the first cavity 31 and the guide hole 21 can be circulated with each other through the first channel 411, avoiding problems such as blockage, and making the stator assembly 20 and the mover assembly 10 move more smoothly.

[0086] In some embodiments, as shown in Figures 6 to 8, a third through groove 211 is provided on the hole wall of the guide hole 21. The third through groove 211 can further increase the connecting air gap between the first cavity 31 and the second cavity 32, so that the first cavity 31 and the guide hole 21 can be connected through the third through groove 211 and the first channel 411, so that the first cavity 31 is connected to the second cavity 32.

[0087] In this way, the required connectivity requirements can be met, and the airflow can flow from both the radial inner side and the radial outer side of the stator assembly 20, increasing the flow area, and reducing the resistance to the mutual movement of the stator assembly 20 and the mover assembly 10, making the stator assembly 20 and the mover assembly 10 move more smoothly, which is beneficial to extending the service life of the linear motor 100.

[0088] In some embodiments, as shown in Figures 6-8, the third through groove 211 extends along the axial direction of the guide hole 21 (for example, the up and down direction shown in Figure 8), so that the airflow through the third through groove 211 flows more smoothly, avoiding problems such as obstruction.

[0089] In some embodiments, as shown in Figures 6 to 8, a plurality of third through grooves 211 (greater than or equal to two) are provided on the hole wall of the guide hole 21, and the plurality of third through grooves 211 are arranged at circumferential intervals along the guide hole 21. The plurality of third through grooves 211 can increase the flow area, making the airflow smoother, thereby reducing the resistance to the mutual movement of the stator assembly 20 and the movable subassembly 10, so that the stator assembly 20 and the movable subassembly 10 can move more smoothly.

[0090] In some embodiments, as shown in Figures 2, 7 and 8, a mounting groove 212 is provided on the hole wall of the guide hole 21, the first sliding bearing 41 is located in the mounting groove 212, and one end of the first sliding bearing 41 in the longitudinal direction is abutted against the groove side wall of the mounting groove 212, and the other end of the first sliding bearing 41 in the longitudinal direction is provided with a first stop member 24, and the first stop member 24 is abutted against the other end of the first sliding bearing 41 in the longitudinal direction.

[0091] In this way, the groove side wall of the installation groove 212 and the first stop member 24 can jointly achieve axial limitation of the first sliding bearing 41, ensure the accurate assembly position of the first sliding bearing 41, enhance the connection stability of the first sliding bearing 41 on the stator assembly 20, and reduce the possibility of the first sliding bearing 41 falling off or moving due to vibration of the stator assembly 20 when the linear motor 100 is working, and can make full use of the axial space of the stator assembly 20, so that the first stop member 24 and the first sliding bearing 41 have a compact structure.

[0092] In some embodiments, the first sliding bearing 41 is connected to the hole wall of the guide hole 21 by interference fit, or the first sliding bearing 41 is connected to the guide hole 21 by a key, ensuring that the first sliding bearing 41 is reliably fixed.

[0093] In some embodiments, as shown in Figures 2, 7 and 8, the first stop member 24 is annular and extends circumferentially along the first sliding bearing 41, which can increase the contact area between the first stop member 24 and the first sliding bearing 41, thereby improving the limiting effect of the first stop member 24 on the first sliding bearing 41, further enhancing the connection stability of the first sliding bearing 41 on the stator assembly 20, and avoiding problems such as movement or falling off of the first sliding bearing 41.

[0094] In some embodiments, the first stop member 24 can be an elastic retaining ring or a metal ring, so that the first stop member 24 has higher structural strength and higher wear resistance, can prevent the axial movement of the first sliding bearing 41, and is beneficial to extending the service life of the linear motor 100.

[0095] According to some embodiments of the present disclosure, as shown in Figures 1 and 12, an opening 25 is provided on the stator assembly 20, and the opening 25 connects the guide hole 21 and the second cavity 32, which can meet the connection requirements of the guide hole 21 and the second cavity 32, and has a simple structure, which facilitates the processing and manufacturing of the stator assembly 20, and is conducive to reducing production costs.

[0096] In some embodiments, as shown in Figures 1, 2, 4 and 5, the stator assembly 20 includes a stator core shaft 201 and a winding, an opening 25 is provided on the stator core shaft 201, the winding is sleeved on the stator core shaft 201, and the opening 25 is located on the side of the winding close to the second cavity 32 (for example, the upper side shown in Figure 1), and the linear motor 100 also includes a conductive component, which is located in the stator core shaft 201, and the conductive component is connected to the winding through the opening 25.

[0097] In this way, the conductive component can be connected to the winding, which facilitates the conductive component to power the winding, so that the linear motor can operate normally. In addition, the opening 25 can simultaneously achieve ventilation and electrical connection requirements, making the structure compact and ensuring the structural strength of the stator assembly 20.

[0098] In some embodiments of the present disclosure, as shown in Figures 7 and 8, the first channel 411 extends along the axial direction of the first sliding bearing 41 (for example, the up and down directions shown in Figure 8), so that the airflow through the first channel 411 flows more smoothly, avoiding problems such as blockage, and the structure is simple, which facilitates the processing and manufacturing of the first sliding bearing 41, and helps reduce production costs.

[0099] According to some embodiments of the present disclosure, as shown in Figures 7, 8 and 10, a plurality of first channels 411 (greater than or equal to two) are provided on the first sliding bearing 41, and the plurality of first channels 411 are arranged at circumferential intervals along the first sliding bearing 41. The plurality of first channels 411 can increase the flow area, so that the airflow flows more smoothly, thereby reducing the resistance to the mutual movement of the stator assembly 20 and the mover assembly 10, so that the stator assembly 20 and the mover assembly 10 can move more smoothly.

[0100] In some embodiments, the plurality of first channels 411 may be a plurality of through holes formed on the first sliding bearing 41, or the plurality of first channels 411 may be a plurality of through grooves formed on the first sliding bearing 41 as shown in FIG10 , or the plurality of first channels 411 may be a plurality of through holes and through grooves formed on the first sliding bearing 41. Thus, the requirement of increasing the connecting air gap between the first cavity 31 and the second cavity 32 can be met, which is conducive to increasing the flow area, and the structure is simple, which is easy to process and manufacture.

[0101] In some embodiments, as shown in Figures 7, 10 and 13, the multiple first channels 411 are multiple grooves located on the inner circumferential wall of the first sliding bearing 41, so that the structure of the first channel 411 is simple, the first channel 411 is easy to process and manufacture, and it is beneficial to reduce the production cost of the first sliding bearing 41.

[0102] According to some embodiments of the present disclosure, as shown in Figures 7, 10 and 13, the multiple first channels 411 include a first groove 81 and a second groove 82. While meeting the airflow circulation requirements, it is possible to avoid the inner circumferential wall of the first sliding bearing 41 being provided with a large number of first channels 411, which affects the accuracy of the inner circumferential wall of the first sliding bearing 41, thereby ensuring the load-bearing capacity of the first sliding bearing 41.

[0103] Furthermore, as shown in Figures 7 and 10 , the first groove 81 and the second groove 82 are disposed opposite each other, for example, axially symmetrically. When assembling the first sliding bearing 41 , the opposing first groove 81 and second groove 82 facilitate extrusion and installation of the first sliding bearing 41 , making assembly of the first sliding bearing 41 more convenient and improving assembly efficiency.

[0104] In some embodiments, there is grease between the first sliding bearing 41 and the mover assembly 10, and the grease can be used to lubricate the stator assembly 20 and the mover assembly 10 when they move relative to each other, so that the stator assembly 20 and the mover assembly 10 move relative to each other more smoothly, effectively reducing friction.

[0105] In related technologies, when the linear motor is working, when the mover assembly and the stator assembly move relative to each other, the grease on the inner wall of the first sliding bearing is easily carried away, reducing the amount of grease, making the lubrication environment worse, increasing the wear of the first sliding bearing, and reducing its service life.

[0106] Therefore, in some embodiments, as shown in Figures 7, 8 and 10, grease is provided in the first channel 411, and the grease does not block the first channel 411. In this way, a portion of the grease can be stored through the first channel 411, thereby increasing the amount of grease between the first sliding bearing 41 and the mover assembly 10 as a backup storage grease.

[0107] When the mover assembly 10 and the stator assembly 20 move relative to each other, the grease stored in the first channel 411 can be replenished in a timely manner, effectively improving the lubrication environment between the first sliding bearing 41 and the mover assembly 10. Continuously lubricating the first sliding bearing 41 improves the lubrication environment between the mover assembly 10 and the first sliding bearing 41, reduces wear on the inner circumferential wall of the first sliding bearing 41, and helps extend the service life of the first sliding bearing 41. Furthermore, because the grease does not block the first channel 411, it can meet the need to increase the air gap connecting the first cavity 31 and the second cavity 32, thereby increasing the flow area. The structure is simple and easy to manufacture.

[0108] In some embodiments of the present disclosure, the shape of the first channel 411 can be set according to actual conditions. For example, the first channel 411 can be formed into a square groove, a triangular groove, etc.

[0109] In some embodiments, as shown in FIG. 10 , the first channel 411 is formed as an arc-shaped groove, which can avoid stress concentration problems on the first sliding bearing 41 and is beneficial for improving the structural strength of the first sliding bearing 41 .

[0110] In some embodiments of the present disclosure, as shown in FIG13 , a plurality of first channels 411 are unevenly distributed along the circumference of the first sliding bearing 41 , that is, along the circumference of the first channels 411 , the spacing between any two adjacent first channels 411 in the plurality of first channels 411 is different, which can effectively reduce noise, vibration, and acoustic roughness (NVH) problems and meet the required usage requirements.

[0111] For example, when the linear motor 100 is used in a suspension assembly of a vehicle, since the load-bearing capacity of different circumferential parts of the linear motor 100 is different, a relatively sparse first channel 411 is provided at a position with greater load-bearing capacity, and a relatively dense first channel 411 is provided on the opposite side of the position with greater load-bearing capacity, which can improve the service life of the first sliding bearing 41.

[0112] According to some embodiments of the present disclosure, as shown in Figures 5, 6 and 9, one axial end of the housing 11 (for example, the upper end shown in Figure 1) is open to form an open hole 113, and a portion of the stator assembly 20 is passed through the open hole 113, so that the portion of the stator assembly 20 can be located in the housing 11 through the open hole 113, thereby realizing the movement requirements between the movable component 10 and the stator assembly 20.

[0113] Furthermore, as shown in FIG3 and FIG9 , a seal 50 is provided between the wall of the open hole 113 and the outer peripheral wall of the stator assembly 20. The seal 50 can achieve the sealing requirement between the wall of the open hole 113 and the outer peripheral wall of the stator assembly 20, effectively preventing external impurities (such as dust, moisture, etc.) from entering the interior of the linear motor 100 through the open hole 113, thereby protecting the internal structure of the linear motor 100 and facilitating the extension of the service life of the linear motor 100. For example, the seal 50 can be an oil seal.

[0114] In some embodiments of the present disclosure, as shown in Figures 6, 9 and 11, a second sliding bearing 42 is further provided between the hole wall of the open hole 113 and the outer peripheral wall of the stator assembly 20. The second sliding bearing 42 can reduce the friction between the stator assembly 20 and the mover assembly 10, effectively reduce energy loss, help reduce the degree of wear, and extend the service life of the linear motor 100.

[0115] In addition, the second sliding bearing 42 is located on the side of the seal 50 close to the second cavity 32 (for example, the lower side shown in Figure 3), so that the seal 50 can prevent external impurities from entering the second sliding bearing 42 through the open hole 113, avoiding problems such as wear on the second sliding bearing 42, which is conducive to extending the service life.

[0116] In some embodiments, as shown in Figures 3, 9, and 11, a fourth cavity 34 is defined between the second sliding bearing 42 and the seal 50. A second channel 421 is defined in the second sliding bearing 42 to connect the second cavity 32 with the fourth cavity 34. This allows airflow through the second channel 421 between the second cavity 32 and the fourth cavity 34, facilitating regulation of the pressure differential between the fourth cavity 34 and the second cavity 32. This prevents the seal 50 from failing due to pressure, ensures reliable sealing of the seal 50, and extends the service life of the linear motor 100. Furthermore, machining the second channel 421 in the second sliding bearing 42 facilitates fabrication, simplifies processing, and helps reduce production costs.

[0117] In some embodiments, the second channel 421 can be a through hole formed on the second sliding bearing 42, or the second channel 421 can be a through groove formed on the second sliding bearing 42 as shown in Figure 11. In this way, both can meet the requirements of connecting the second cavity 32 and the fourth cavity 34, and have a simple structure and are easy to process and manufacture.

[0118] In some embodiments, the second sliding bearing 42 can be integrally formed, which facilitates processing and manufacturing of the second sliding bearing 42 and helps reduce production costs.

[0119] For example, the second sliding bearing 42 can be formed by powder metallurgy sintering and pressing, and the second sliding bearing 42 is provided with air holes, and grease is filled into the air holes through high pressure. The grease can achieve lubrication between the stator assembly 20 and the mover assembly 10 when they move relative to each other, so that the stator assembly 20 and the mover assembly 10 move relative to each other more smoothly, effectively reducing friction.

[0120] In some embodiments, the outer peripheral wall of the second sliding bearing 42 and the hole wall of the open hole 113 are interference fit, thereby ensuring that the second sliding bearing 42 is securely fixed to the stator assembly 20 .

[0121] According to some embodiments of the present disclosure, as shown in Figures 3, 9 and 11, the second sliding bearing 42 includes a main body portion 422, and the stator assembly 20 is inserted into the main body portion 422. The stator assembly 20 can be guided by the main body portion 422 to ensure that the stator assembly 20 can move reliably, and the second channel 421 is provided on the main body portion 422 to facilitate the flow of air on the second channel 421, thereby facilitating the processing and manufacturing of the second sliding bearing 42.

[0122] In addition, as shown in Figures 3, 9 and 11, the second sliding bearing 42 also includes a stop portion 423, which is provided on the outer peripheral wall of the main body 422, and the stop portion 423 extends along the circumferential direction of the main body 422. One axial end of the stop portion 423 (for example, the lower end shown in Figure 3) is abutted against the mover assembly 10, so that the mover assembly 10 can limit the second sliding bearing 42, ensuring that the second sliding bearing 42 is accurately assembled on the housing 11.

[0123] In some embodiments, as shown in Figures 3 and 9, a second stop member 12 is provided on the side of the stop portion 423 facing the open hole 113 (for example, the upper side shown in Figure 3), and the second stop member 12 is abutted against the side of the stop portion 423 facing the open hole 113. By abutting one axial end of the stop portion 423 against the mover assembly 10, and the second stop member 12 is abutted against the side of the stop portion 423 facing the open hole 113, axial limitation of the second sliding bearing 42 can be achieved.

[0124] In this way, the assembly position of the second sliding bearing 42 can be ensured to be accurate, the connection stability of the second sliding bearing 42 on the mover assembly 10 can be enhanced, the possibility of the second sliding bearing 42 falling off or moving due to the vibration of the mover assembly 10 when the linear motor 100 is working can be reduced, and the axial space of the mover assembly 10 can be fully utilized to make the second stop member 12 and the second sliding bearing 42 compact in structure.

[0125] In some embodiments, as shown in Figures 3 and 9, the second stop member 12 is annular and extends circumferentially along the second sliding bearing 42, which can increase the contact area between the second stop member 12 and the second sliding bearing 42, thereby improving the limiting effect of the second stop member 12 on the second sliding bearing 42, further enhancing the connection stability of the second sliding bearing 42 on the mover assembly 10, and avoiding problems such as movement or falling off of the second sliding bearing 42.

[0126] In some embodiments, the second stop member 12 can be an elastic retaining ring or a metal ring, so that the second stop member 12 has higher structural strength and wear resistance, can effectively prevent the second stop member 12 from moving in the axial direction, and is beneficial to extending the service life of the linear motor 100.

[0127] According to some embodiments of the present disclosure, as shown in Figures 5 and 9, a boss 13 is provided on the inner wall surface of one end of the housing 11 where the open hole 113 is provided. The boss 13 surrounds the open hole 113, which is beneficial to improving the structural strength of the housing 11, and part of the second sliding bearing 42 is located between the inner peripheral wall of the boss 13 and the outer peripheral wall of the stator assembly 20, which can facilitate the placement of the second sliding bearing 42 and can reduce the thickness of the housing 11 where the open hole 113 is provided, which is beneficial to reducing the material cost of the housing 11.

[0128] In some embodiments, as shown in Figures 3 and 9, the seal 50 and the second stop member 12 are spaced apart in the axial direction of the housing 11, which can avoid interference between the seal 50 and the second stop member 12, ensure the sealing effect of the seal 50 and the limiting effect of the second stop member 12 on the second sliding bearing 42, and meet the required usage requirements.

[0129] In some embodiments of the present disclosure, as shown in Figures 3, 9 and 11, the second channel 421 extends along the axial direction of the second sliding bearing 42 (for example, the up and down directions shown in Figure 3), so that the airflow through the second channel 421 flows more smoothly, avoiding problems such as obstruction, and the structure is simple, which facilitates the processing and manufacturing of the second sliding bearing 42, and helps reduce production costs.

[0130] According to some embodiments of the present disclosure, as shown in FIG11 , a plurality of second channels 421 (greater than or equal to two) are provided on the second sliding bearing 42, and the plurality of second channels 421 are arranged at circumferential intervals along the second sliding bearing 42. The plurality of second channels 421 can increase the flow area, making the airflow smoother, avoiding problems such as failure of the seal 50 due to pressure, and ensuring that the seal 50 is sealed reliably.

[0131] In some embodiments, as shown in Figure 11, the multiple second channels 421 are multiple grooves located on the inner circumferential wall of the second sliding bearing 42, which makes the structure of the second channels 421 simple, facilitates the processing and manufacturing of the second channels 421, and helps reduce the production cost of the second sliding bearing 42.

[0132] According to some embodiments of the present disclosure, as shown in Figure 11, the multiple second channels 421 include a third groove 83 and a fourth groove 84. While meeting the airflow circulation requirements, it is possible to avoid the inner circumferential wall of the second sliding bearing 42 being provided with a large number of second channels 421, which affects the accuracy of the inner circumferential wall of the second sliding bearing 42, thereby ensuring the load-bearing capacity of the second sliding bearing 42.

[0133] In addition, as shown in Figure 11, the third groove 83 and the fourth groove 84 are arranged relative to each other. For example, the third groove 83 and the fourth groove 84 are arranged axially symmetrically. When the second sliding bearing 42 is assembled, the relative third groove 83 and the fourth groove 84 can facilitate the extrusion and installation of the second sliding bearing 42, making the assembly of the second sliding bearing 42 more convenient and helping to improve assembly efficiency.

[0134] In some embodiments of the present disclosure, the shape of the second channel 421 can be set according to actual conditions. For example, the second channel 421 can be formed into a square groove, a triangular groove, etc.

[0135] In some embodiments, as shown in FIG. 11 , the second channel 421 is formed as an arc-shaped groove, which can avoid stress concentration problems on the second sliding bearing 42 and is beneficial for improving the structural strength of the second sliding bearing 42 .

[0136] In some embodiments of the present disclosure, the plurality of second channels 421 are unevenly distributed along the circumference of the second sliding bearing 42, that is, along the circumference of the second sliding bearing 42, the spacing between any two adjacent second channels 421 in the plurality of second channels 421 is different, which can effectively reduce noise, vibration and harshness (NVH) problems and meet the required usage requirements.

[0137] For example, when the linear motor 100 is used in a suspension assembly of a vehicle, since the load-bearing capacity of different circumferential parts of the linear motor 100 is different, a relatively sparse second channel 421 is provided at a position with greater load-bearing capacity, and a relatively dense second channel 421 is provided on the opposite side of the position with greater load-bearing capacity, which can improve the service life of the second sliding bearing 42.

[0138] In some embodiments, there is grease between the second sliding bearing 42 and the stator assembly 20, and the grease can be used to lubricate the stator assembly 20 and the mover assembly 10 when they move relative to each other, making the stator assembly 20 and the mover assembly 10 move relative to each other smoother and effectively reducing friction.

[0139] In related technologies, when the linear motor is working, when the mover assembly and the stator assembly move relative to each other, the grease on the inner wall of the second sliding bearing is easily carried away, reducing the amount of grease, making the lubrication environment worse, increasing the wear of the second sliding bearing, and reducing its service life.

[0140] Therefore, in some embodiments of the present disclosure, as shown in Figures 3, 9 and 11, grease is provided in the second channel 421, and the grease does not block the second channel 421. A large amount of grease can be stored through the second channel 421, thereby increasing the amount of grease between the second sliding bearing 42 and the stator assembly 20 as a backup storage grease.

[0141] When the mover assembly 10 and the stator assembly 20 move relative to each other, the grease stored in the second channel 421 can be replenished in time for lubrication, effectively improving the lubrication environment between the second sliding bearing 42 and the stator assembly 20, and continuously lubricating the second sliding bearing 42, which can improve the lubrication environment of the stator assembly 20 and the second sliding bearing 42, reduce the wear of the inner wall of the second sliding bearing 42, and help extend the service life.

[0142] In some embodiments, the second sliding bearing 42 is provided with a plurality of second channels 421. The plurality of second channels 421 can be a plurality of through holes formed on the second sliding bearing 42, or the plurality of second channels 421 can be a plurality of through grooves formed on the second sliding bearing 42 as shown in Figure 11, or the plurality of second channels 421 can be through holes and through grooves formed on the second sliding bearing 42. Thus, both can meet the requirements of connecting the second cavity 32 and the fourth cavity 34, which is conducive to increasing the flow area, and has a simple structure, which is convenient for the processing and manufacturing of the second sliding bearing 42.

[0143] In some embodiments, as shown in Figures 3, 9, and 11, the through-groove formed in the second sliding bearing 42 is located on the inner circumferential wall of the second sliding bearing 42, and the second sliding bearing 42 is formed with a through-hole. Grease is provided in the through-groove formed in the second sliding bearing 42. The through-groove formed in the second sliding bearing 42 can store a large amount of grease, thereby increasing the amount of grease between the first sliding bearing 41 and the mover assembly 10 and serving as a backup grease reservoir. Furthermore, the through-hole formed in the second sliding bearing 42 satisfies the requirement of connecting the second cavity 32 and the fourth cavity 34, thereby increasing the flow area. The structure is simple and easy to manufacture.

[0144] According to some embodiments of the present disclosure, as shown in Figures 1, 3, 5, and 6, a vent valve 60 is provided on the side wall of the housing 11. The vent valve 60 can connect the first cavity 31 with the external environment, or connect the second cavity 32 with the external environment. For example, the vent valve 60 can connect the first cavity 31 with the external environment, or the vent valve 60 can connect the second cavity 32 with the external environment, so that the gas in the first cavity 31 or the second cavity 32 can be exchanged with the gas in the external environment, thereby quickly adjusting the pressure in the first cavity 31 or the second cavity 32, reducing the resistance to the mutual movement of the stator assembly 20 and the mover assembly 10, for example, reducing the air resistance caused by the volume change of the first cavity 31 and the second cavity 32 during compression and extension.

[0145] In this way, the stator assembly 20 and the mover assembly 10 can move relative to each other more smoothly, and can have a better heat dissipation effect, which is beneficial to extending the service life of the linear motor 100.

[0146] In addition, the vent valve 60 can play a role in dustproof and waterproof, preventing moisture or dust from entering the interior of the linear motor 100, thereby improving the reliability of the linear motor 100 and extending the service life of the linear motor 100.

[0147] In addition, the air flow can flow through the air gap between the stator assembly 20 and the mover assembly 10, and the air flow can be realized through the first channel 411 to flow between the first cavity 31 and the second cavity 32, so that the first cavity 31 or the second cavity 32 can exchange gas with each other through the vent valve 60, so that the gas in the first cavity 31 and the second cavity 32 can flow between the first cavity 31 and the second cavity 32, which helps to quickly adjust the pressure in the first cavity 31 and the second cavity 32, reduce or avoid the pressure difference between the first cavity 31 and the second cavity 32, and balance the pressure in the first cavity 31 and the second cavity 32, thereby reducing or avoiding the reciprocating motion of the linear motor 100 being affected by the pressure difference and causing fluctuations, thereby improving sensitivity.

[0148] It should be noted that the external environment can be a space located outside the linear motor 100. When the external environment is a space located outside the linear motor 100, the external environment can be part of the external atmospheric space; the external environment can also be a space located inside the linear motor 100. When the external environment is a space located inside the linear motor 100, the external environment can be connected to the external atmosphere, or the external environment can be separated from the external atmosphere.

[0149] In some embodiments, as shown in Figure 3, the vent valve 60 does not extend beyond the outer wall of the housing 11, which can make the overall structure of the vent valve 60 and the movable subassembly 10 more compact, and can avoid problems such as the vent valve 60 interfering with the external structure of the movable subassembly 10 due to extending beyond the outer wall of the housing 11.

[0150] In some embodiments, the vent valve 60 is detachably mounted on the side wall of the housing 11 , so as to facilitate maintenance or replacement of the vent valve 60 .

[0151] In some embodiments, as shown in FIG3 , the vent valve 60 is threadedly connected to the side wall of the housing 11 , which can simplify the connection between the vent valve 60 and the mover assembly 10 and provide greater stability, thereby facilitating the removal or installation of the vent valve 60 from the housing 11 .

[0152] In some embodiments, as shown in Figures 1, 2 and 5, a vibration damper 23 is provided at the lower end of the stator assembly 20. When the mover assembly 10 moves relatively along the axial direction of the stator assembly 20, the vibration damper 23 can avoid direct contact between the mover assembly 10 and the stator assembly 20 to cause vibration and noise problems, thereby ensuring that the linear motor 100 operates reliably.

[0153] The electromagnetic vibration absorber 200 according to some embodiments of the present disclosure includes the linear motor 100 according to some embodiments of the present disclosure.

[0154] Since the linear motor 100 according to some embodiments of the present disclosure has the above-mentioned beneficial technical effects, the electromagnetic vibration absorber 200 according to some embodiments of the present disclosure is arranged in the outer shell 11 along the axial direction of the outer shell 11 through part of the stator assembly 20, and a first cavity 31 and a second cavity 32 are respectively provided between the axial ends of the stator core 202 of the stator assembly 20 and the outer shell 11, and a first sliding bearing 41 is provided between the stator assembly 20 and the mover assembly 10. A first channel 411 is provided on the first sliding bearing 41 to increase the connecting air gap between the first cavity 31 and the second cavity 32, so that the airflow can flow through the air gap between the stator assembly 20 and the mover assembly 10.

[0155] In addition, the first channel 411 can be used to enable the air flow between the first cavity 31 and the second cavity 32, thereby increasing the flow area of ​​the air flow between the first cavity 31 and the second cavity 32, making it easier to adjust the pressure difference between the first cavity 31 and the second cavity 32, so that the stator assembly 20 and the mover assembly 10 move more smoothly relative to each other, which is beneficial to extending the service life of the linear motor 100, and it is more convenient to process the first channel 411 on the first sliding bearing 41, which is simple to process and helps to reduce production costs.

[0156] As shown in FIG. 14 , a vehicle 1000 according to some embodiments of the present disclosure includes an electromagnetic vibration absorber 200 according to some embodiments of the present disclosure.

[0157] Since the electromagnetic shock absorber 200 according to some embodiments of the present disclosure has the above-mentioned beneficial technical effects, the vehicle 1000 according to some embodiments of the present disclosure is arranged in the outer shell 11 along the axial direction of the outer shell 11 through part of the stator assembly 20, and a first cavity 31 and a second cavity 32 are respectively provided between the axial ends of the stator core 202 of the stator assembly 20 and the outer shell 11, a first sliding bearing 41 is provided between the stator assembly 20 and the mover assembly 10, and a first channel 411 is provided on the first sliding bearing 41 to increase the connecting air gap between the first cavity 31 and the second cavity 32, so that the airflow can flow through the air gap between the stator assembly 20 and the mover assembly 10.

[0158] In addition, the first channel 411 can be used to enable the air flow between the first cavity 31 and the second cavity 32, thereby increasing the flow area of ​​the air flow between the first cavity 31 and the second cavity 32, making it easier to adjust the pressure difference between the first cavity 31 and the second cavity 32, so that the stator assembly 20 and the mover assembly 10 move more smoothly relative to each other, which is beneficial to extending the service life of the linear motor 100, and it is more convenient to process the first channel 411 on the first sliding bearing 41, which is simple to process and helps to reduce production costs.

[0159] In some embodiments, when the linear motor 100 is applied to the vehicle 1000, the stator assembly 20 can be connected to the body of the vehicle 1000, and the mover assembly 10 can be connected to the wheels of the vehicle 1000. For example, the linear motor 100 is placed vertically, the upper end of the stator assembly 20 is connected to the body, and the lower end of the mover assembly 10 is connected to the wheel. This can meet the installation requirements of the linear motor 100 and ensure that the linear motor 100 is reliably installed on the vehicle 1000. The mover assembly 10 can perform reciprocating linear motion up and down relative to the stator assembly 20 to meet usage requirements.

[0160] In some embodiments, as shown in FIG. 1 , FIG. 4 and FIG. 6 , a lower fork arm 70 is provided on the housing 11 , and the lower fork arm 70 is connected to the wheel to meet the required connection requirements.

[0161] Other configurations and operations of the linear motor 100 , the electromagnetic absorber 200 , and the vehicle 1000 according to some embodiments of the present disclosure are well known to those skilled in the art and will not be described in detail herein.

[0162] In the description of this disclosure, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this disclosure based on the specific circumstances.

[0163] Throughout this specification, reference to terms such as "embodiment," "specific embodiment," and "example" indicates that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, schematic representations 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 any one or more embodiments or examples.

[0164] Although the embodiments of the present disclosure have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations may be made to the embodiments without departing from the principles and spirit of the present disclosure, the scope of which is defined by the claims and their equivalents.

Claims

1. A linear motor (100), comprising: A movable subassembly (10), wherein the movable subassembly (10) has a housing (11); A stator assembly (20), wherein a portion of the stator assembly (20) is disposed within the housing (11) along the axial direction of the housing (11), the stator assembly comprising a stator core (202), and a first cavity (31) and a second cavity (32) are respectively disposed between the axial ends of the stator core (202) and the housing (11); and A first sliding bearing (41) is provided between the stator assembly (20) and the mover assembly (10), and at least one first channel (411) is provided on the first sliding bearing (41) to increase a communication air gap between the first cavity (31) and the second cavity (32).

2. The linear motor (100) according to claim 1, wherein: The housing (11) comprises: a shell body (111), wherein the portion of the stator assembly (20) is arranged inside the shell body (111) along the axial direction of the shell body (111); and A guide column (112), wherein the guide column (112) is arranged in the shell body (111), a guide hole (21) is formed on the stator assembly (20), and the guide column (112) extends along the axial direction of the stator assembly (20) and extends into the guide hole (21); the guide hole (21) and the second cavity (32) are connected; the first sliding bearing (41) is arranged between the outer peripheral wall of the guide column (112) and the hole wall of the guide hole (21), and the first cavity (31) and the guide hole (21) are connected through the at least one first channel (411).

3. The linear motor (100) according to claim 2, wherein: The stator assembly (20) is provided with an opening (25), and the opening (25) is connected to the guide hole (21) and the second cavity (32).

4. The linear motor (100) according to claim 3, wherein: The stator assembly (20) comprises: a stator core shaft (201), the opening (25) being provided on the stator core shaft (201); and A winding, the winding being sleeved on the stator core shaft (201), the opening (25) being located on a side of the winding close to the second cavity (32); The linear motor (100) further comprises a conductive component, wherein the conductive component is located in the stator core shaft (201) and is connected to the winding through the opening (25).

5. The linear motor (100) according to any one of claims 1 to 4, wherein: The at least one first channel (411) extends in the axial direction of the first sliding bearing (41).

6. The linear motor (100) according to any one of claims 1 to 5, wherein: The at least one first channel (411) includes a plurality of first channels (411), and the plurality of first channels (411) are arranged at intervals along the circumference of the first sliding bearing (41).

7. The linear motor (100) according to claim 6, wherein: The plurality of first channels (411) are grooves located on the inner peripheral wall of the first sliding bearing (41).

8. The linear motor (100) according to claim 7, wherein: The plurality of first channels (411) include a first groove (81) and a second groove (82), wherein the first groove (81) and the second groove (82) are arranged opposite to each other.

9. The linear motor (100) according to claim 7, wherein: The plurality of first channels (411) are unevenly distributed along the circumference of the first sliding bearing (41).

10. The linear motor (100) according to claim 7, wherein: Grease is provided in any one of the plurality of first channels (411), and the grease does not block any one of the first channels (411).

11. The linear motor (100) according to any one of claims 1 to 10, wherein: One axial end of the housing (11) is open to form an open hole (113), the portion of the stator assembly (20) is passed through the open hole (113), and a sealing member (50) is provided between the hole wall of the open hole (113) and the outer peripheral wall of the stator assembly (20).

12. The linear motor (100) according to claim 11, wherein: A second sliding bearing (42) is further provided between the hole wall of the open hole (113) and the outer peripheral wall of the stator assembly (20), and the second sliding bearing (42) is located on a side of the sealing member (50) close to the second cavity (32).

13. The linear motor (100) according to claim 12, wherein: A fourth cavity (34) is defined between the second sliding bearing (42) and the sealing member (50), and a second channel (421) is provided on the second sliding bearing (42) to connect the second cavity (32) and the fourth cavity (34).

14. The linear motor (100) according to claim 13, wherein: The second channel (421) extends in the axial direction of the second sliding bearing (42).

15. The linear motor (100) according to claim 13 or 14, wherein: The second sliding bearing (42) comprises: A main body (422), the stator assembly (20) is disposed through the main body (422), and the second channel (421) is disposed on the main body (422); and A stop portion (423) is provided on the outer peripheral wall of the main body (422) and extends along the circumferential direction of the main body (422); one axial end of the stop portion (423) abuts against the outer shell (11).

16. The linear motor (100) according to any one of claims 12 to 15, wherein: A boss (13) is provided on the inner wall surface of one end of the housing (11) provided with the open hole (113); the boss (13) surrounds the open hole (113); and a portion of the second sliding bearing (42) is located between the inner peripheral wall of the boss (13) and the outer peripheral wall of the stator assembly (20).

17. The linear motor (100) according to any one of claims 1 to 16, wherein: A vent valve is provided on the side wall of the housing (11), and the vent valve satisfies one of the following conditions: The vent valve connects the first cavity (31) with the external environment; and The vent valve communicates with the second cavity (32) and the external environment.

18. An electromagnetic vibration absorber (200), comprising the linear motor (100) according to any one of claims 1-17.

19. A vehicle (1000) comprising the electromagnetic vibration absorber according to claim 18.

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