Linear motor, electromagnetic damper and vehicle

Abstract

The application discloses a linear motor, an electromagnetic damper and a vehicle, and relates to the technical field of linear motors, and specifically discloses a linear motor, which comprises a mover assembly, wherein the mover assembly is provided with a shell; a stator assembly, part of the stator assembly is arranged in the shell along an axial direction of the shell, the stator assembly comprises a stator core, first and second cavities are respectively arranged between axial two ends of the stator core and the shell, and a first sliding bearing is arranged between the stator assembly and the mover assembly, and a first channel is formed in the first sliding bearing to increase a communication air gap of the first and second cavities. According to the linear motor, the stator assembly and the mover assembly can be smoothly moved relative to each other, the service life is prolonged, the linear motor is convenient to manufacture, and the production cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of motor technology, and more specifically, to a linear motor, an electromagnetic vibration damper, and a vehicle. Background Technology

[0002] In related technologies, when the mover assembly moves along the axial direction of the stator assembly, the resistance between the stator assembly and the mover assembly is relatively large, which increases the energy consumption of the linear motor, easily causes the linear motor to overheat, and leads to damage to the linear motor, thus reducing its service life. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one object of the present invention is to provide a linear motor that enables smooth movement between the stator assembly and the mover assembly, which is beneficial for extending service life, facilitating manufacturing, and reducing production costs.

[0004] Another object of the present invention is to provide an electromagnetic vibration damper having the above-mentioned linear motor.

[0005] Another object of the present invention is to provide a vehicle having the above-mentioned electromagnetic damper.

[0006] A linear motor according to an embodiment of the present invention includes: a mover assembly having a housing; a stator assembly having a portion disposed within the housing along the axial direction of the housing, the stator assembly including a stator core, a first cavity and a second cavity respectively provided between the axial ends of the stator core and the housing, a first sliding bearing provided between the stator assembly and the mover assembly, the first sliding bearing having a first channel to increase the air gap connecting the first cavity and the second cavity.

[0007] According to an embodiment of the present invention, a linear motor is provided in the housing via a portion of the stator assembly disposed axially within the housing. A first cavity and a second cavity are respectively provided between the two axial ends of the stator core of the stator assembly and the housing. A first sliding bearing is provided between the stator assembly and the mover assembly. A first channel is provided on the first sliding bearing to increase the air gap connecting the first cavity and the second cavity, allowing airflow to pass through the air gap between the stator assembly and the mover assembly. Simultaneously, airflow can be achieved between the first cavity and the second cavity through the first channel, increasing the flow area between the first cavity and the second cavity. This facilitates adjustment of the pressure difference between the first cavity and the second cavity, resulting in smoother movement between the stator assembly and the mover assembly, which is beneficial for extending the service life of the linear motor. Furthermore, machining the first channel on the first sliding bearing is more convenient and simpler, which helps reduce production costs.

[0008] In addition, the linear motor according to the above embodiments of the present invention may also have the following additional technical features:

[0009] According to some embodiments of the linear motor of the present invention, the housing includes: a housing body, a portion of the stator assembly being disposed within the housing body along the axial direction of the housing body; a guide post disposed within the housing body, a guide hole being formed on the stator assembly, the guide post extending along the axial direction of the stator assembly and extending into the guide hole, the guide hole communicating with a second cavity, a first sliding bearing being disposed 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 communicating through a first channel.

[0010] According to some embodiments of the present invention, the stator assembly is provided with an opening that connects the guide hole and the second cavity.

[0011] According to some embodiments of the present invention, the stator assembly includes: a stator mandrel, the opening being disposed on the stator mandrel; a winding, the winding being sleeved on the stator mandrel, the opening being located on the side of the winding near the second cavity; the linear motor further includes a conductive component, the conductive component being located inside the stator mandrel and connected to the winding through the opening.

[0012] According to some embodiments of the present invention, the first channel extends along the axial direction of the first sliding bearing.

[0013] According to some embodiments of the present invention, the first channel is a plurality of channels spaced apart along the circumferential direction of the first sliding bearing.

[0014] According to some embodiments of the present invention, a plurality of the first channels are grooves located on the inner peripheral wall of the first sliding bearing.

[0015] According to some embodiments of the present invention, a plurality of the first channels include a first groove and a second groove, the first groove and the second groove being disposed opposite to each other.

[0016] According to some embodiments of the present invention, a plurality of the first channels are unevenly distributed along the circumferential direction of the first sliding bearing.

[0017] According to some embodiments of the present invention, the first channel is provided with grease, and the grease does not block the first channel.

[0018] According to some embodiments of the present invention, one axial end of the housing is open to form an open hole, a portion of the stator assembly passes through the open hole, and a sealing element is provided between the hole wall of the open hole and the outer peripheral wall of the stator assembly.

[0019] According to some embodiments of the present invention, a second sliding bearing is further provided between the hole wall of the open hole and the outer peripheral wall of the stator assembly, the second sliding bearing being located on the side of the seal near the second cavity.

[0020] According to some embodiments of the present invention, a fourth cavity is defined between the second sliding bearing and the seal, and a second channel is provided on the second sliding bearing to connect the second cavity and the fourth cavity.

[0021] According to some embodiments of the present invention, the second channel extends along the axial direction of the second sliding bearing (42).

[0022] According to some embodiments of the present invention, the second sliding bearing includes: a body portion, the stator assembly passing through the body portion, and the second channel disposed on the body portion; and a stop portion, the stop portion being disposed on the outer peripheral wall of the body portion and extending along the circumferential direction of the body portion, one axial end of the stop portion abutting against the housing.

[0023] According to some embodiments of the present invention, a boss is provided on the inner wall surface of the 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 peripheral wall of the boss and the outer peripheral wall of the stator assembly.

[0024] According to some embodiments of the present invention, a vent valve is provided on the side wall of the housing for connecting the first cavity or the second cavity with the external environment.

[0025] The electromagnetic vibration damper according to an embodiment of the present invention includes the linear motor described in an embodiment of the present invention.

[0026] According to an embodiment of the present invention, the electromagnetic vibration damper includes a portion of the stator assembly disposed within the housing along the axial direction of the housing. A first cavity and a second cavity are respectively provided between the two axial ends of the stator core of the stator assembly and the housing. A first sliding bearing is provided between the stator assembly and the mover assembly. A first channel is provided on the first sliding bearing to increase the air gap connecting the first cavity and the second cavity, allowing airflow to pass through the air gap between the stator assembly and the mover assembly. Simultaneously, airflow can be achieved between the first cavity and the second cavity through the first channel, increasing the flow area between the first cavity and the second cavity. This facilitates adjustment of the pressure difference between the first cavity and the second cavity, resulting in smoother movement between the stator assembly and the mover assembly, which is beneficial for extending the service life of the linear motor. Furthermore, machining the first channel on the first sliding bearing is more convenient and simpler, which helps reduce production costs.

[0027] The vehicle according to an embodiment of the present invention includes the electromagnetic damper described in the embodiment of the present invention.

[0028] According to an embodiment of the present invention, a portion of the stator assembly is disposed within the housing along the axial direction of the housing. A first cavity and a second cavity are respectively provided between the two axial ends of the stator core of the stator assembly and the housing. A first sliding bearing is provided between the stator assembly and the mover assembly. A first channel is provided on the first sliding bearing to increase the air gap connecting the first cavity and the second cavity, allowing airflow to pass through the air gap between the stator assembly and the mover assembly. Simultaneously, airflow can be achieved between the first cavity and the second cavity through the first channel, increasing the flow area between the first cavity and the second cavity. This facilitates adjustment of the pressure difference between the first cavity and the second cavity, making the movement of the stator assembly and the mover assembly smoother, which is beneficial for extending the service life of the linear motor. Furthermore, machining the first channel on the first sliding bearing is more convenient and simpler, which helps reduce production costs.

[0029] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0030] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0031] Figure 1 This is a sectional view of the electromagnetic vibration damper along the axis according to an embodiment of the present invention;

[0032] Figure 2 yes Figure 1 The center circle shows an enlarged structural diagram at point A.

[0033] Figure 3 yes Figure 1 The enlarged structural diagram at point B is shown in the middle circle.

[0034] Figure 4 This is a sectional view of a linear motor along its axis according to an embodiment of the present invention;

[0035] Figure 5 This is a cross-sectional view of a linear motor along its axis according to an embodiment of the present invention;

[0036] Figure 6 This is a partial structural schematic diagram of a linear motor according to an embodiment of the present invention;

[0037] Figure 7 This is a schematic diagram of the structure of the guide post and guide hole of a linear motor according to an embodiment of the present invention;

[0038] Figure 8 This is a schematic diagram of the structure of the stator assembly and the first sliding bearing of the linear motor according to an embodiment of the present invention;

[0039] Figure 9 This is a schematic diagram of the structure of the linear motor housing and the second sliding bearing according to an embodiment of the present invention;

[0040] Figure 10 This is a schematic diagram of the structure of the first sliding bearing of a linear motor according to some embodiments of the present invention;

[0041] Figure 11 This is a schematic diagram of the structure of the second sliding bearing of a linear motor according to an embodiment of the present invention;

[0042] Figure 12 This is a schematic diagram of the stator spindle of a linear motor according to an embodiment of the present invention;

[0043] Figure 13 This is a schematic diagram of the structure of the first sliding bearing of a linear motor according to other embodiments of the present invention.

[0044] Figure label:

[0045] 100. Linear motor; 200. Electromagnetic vibration damper;

[0046] 10. Moving part assembly; 11. Housing; 12. Second stop; 13. Boss; 111. Housing body; 112. Guide post; 113. Opening hole; 114. Magnet;

[0047] 20. Stator assembly; 21. Guide hole; 22. Limiting component; 23. Vibration damping component; 24. First stop component; 25. Opening; 201. Stator mandrel; 202. Stator core; 211. Third through slot; 212. Mounting slot;

[0048] 31. First cavity; 32. Second cavity; 33. Third cavity; 34. Fourth cavity;

[0049] 41. First sliding bearing; 42. Second sliding bearing; 411. First channel; 421. Second channel; 422. Body part; 423. Stop part;

[0050] 50. Sealing components;

[0051] 60. Vent valve;

[0052] 70. Lower fork arm;

[0053] 81. First groove; 82. Second groove; 83. Third groove; 84. Fourth groove. Detailed Implementation

[0054] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0055] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0056] In the description of this invention, "first feature" and "second feature" may include one or more of the features, "multiple" means two or more, "above" or "below" the second feature may include the first and second features being in direct contact, or the first and second features being in contact through another feature between them, and "above," "over," and "on top" the second feature may include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0057] A linear motor 100 according to an embodiment of the present invention will now be described with reference to the accompanying drawings.

[0058] Reference Figures 1-7 As shown, the linear motor 100 according to an embodiment of the present invention may include: a mover assembly 10 and a stator assembly 20.

[0059] Specifically, the mover assembly 10 has a housing 11, and a portion of the stator assembly 20 is along the axial direction of the housing 11 (e.g., Figure 1 The stator assembly 20, including a stator core 202, is located within the housing 11 in the vertical direction shown in the diagram. The axial direction of the stator core 202 (e.g., the vertical direction shown in the diagram) is also within the housing 11. Figure 1A first cavity 31 and a second cavity 32 are respectively provided between the two ends (vertical and vertical directions) and the outer casing 11, allowing the mover assembly 10 to move relative to the stator assembly 20 along the axial direction, thus enabling the linear motor 100 to operate and meeting its operational requirements. Simultaneously, a first sliding bearing 41 is provided between the stator assembly 20 and the mover assembly 10. This first sliding bearing 41 reduces friction between the stator assembly 20 and the mover assembly 10, effectively reducing energy loss, minimizing wear, and extending the service life of the linear motor 100.

[0060] An air gap exists between the stator assembly 20 and the mover assembly 10 to facilitate their relative movement. This air gap connects the first cavity 31 and the second cavity 32, and reducing the air gap can decrease vibration and noise. However, the inventors of this application have discovered that in related technologies, when the mover assembly moves along the axial direction of the stator assembly, the pressure in the first and second cavities changes. Because the air gap between the stator assembly and the mover assembly is small, the flow area between the first and second cavities is small, increasing the resistance to mutual movement between the stator assembly and the mover assembly. This increases the energy consumption of the linear motor, causing it to overheat, which can easily damage the linear motor and reduce its service life.

[0061] Therefore, in order to solve the problem of high mutual resistance between the determinant assembly 20 and the mover assembly 10, in this invention, as... Figure 7 , Figure 8 , Figure 10 and Figure 13 As shown, a first channel 411 is provided on the first sliding bearing 41, which increases the air gap connecting the first cavity 31 and the second cavity 32. This allows airflow to pass through the air gap between the stator assembly 20 and the mover assembly 10, and the airflow can also pass through the first channel 411 between the first cavity 31 and the second cavity 32. This increases the flow area between the first cavity 31 and the second cavity 32, which is beneficial for adjusting the pressure difference between the first cavity 31 and the second cavity 32, effectively improving air pressure. This reduces or avoids problems such as fluctuations caused by pressure difference affecting the relative movement of the stator assembly 20 and the mover assembly 10. It also reduces 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 change in volume of the first cavity 31 and the second cavity 32 during compression and stretching. This makes the mutual movement of the stator assembly 20 and the mover assembly 10 smoother and helps extend the service life of the linear motor 100. At the same time, it is easier to process the first channel 411 on the first sliding bearing 41, simplifying the processing and reducing production costs.

[0062] In some embodiments, the first channel 411 may be a through hole formed on the first sliding bearing 41, or the first channel 411 may be formed on the first sliding bearing 41 as shown in the figure. Figure 10 The through slots shown can all meet the requirement of increasing the air gap between the first cavity 31 and the second cavity 32, and the structure is simple and easy to process and manufacture.

[0063] In some embodiments, such as Figure 1 , Figure 2 and Figure 4 As shown, a magnet 114 is provided on the inner peripheral wall of the outer casing 11, and the stator assembly 20 also includes a stator spindle 201. The stator spindle 201 passes through the outer casing 11, and the stator core 202 is sleeved on the stator spindle 201, which can fix the stator core 202. An air gap is defined between the outer peripheral wall of the stator core 202 and the inner peripheral wall of the magnet 114, which can meet the usage requirements of the linear motor 100.

[0064] In some embodiments, such as Figure 1 , Figure 2 , Figures 4-7 As shown, one axial end of the stator spindle 201 (e.g.) Figure 1 The lower end shown in the figure is provided with a limiting member 22, and the limiting member 22 is connected to one axial end of the stator core 202 (e.g., Figure 1 The lower end shown in the figure abuts against each other, which can ensure that the stator core 202 is reliably fixed on the stator spindle 201, prevent the stator core 202 from falling off the stator spindle 201, and ensure the working safety of the linear motor 100.

[0065] It should be noted that, for ease of description, the directions such as "up" and "down" in this invention are based on the orientation relationships shown in the accompanying drawings, and are not a limitation on the orientation in actual application.

[0066] In some embodiments, the first sliding bearing 41 can be integrally formed, which facilitates the processing and manufacturing of the first sliding bearing 41 and helps to reduce production costs. For example, the first sliding bearing 41 can be formed by powder metallurgy sintering and pressing, and the first sliding bearing 41 is provided with air holes. Grease is filled into the air holes under high pressure, and the grease can lubricate the relative movement between the stator assembly 20 and the mover assembly 10, making the relative movement of the stator assembly 20 and the mover assembly 10 smoother and effectively reducing friction. For example, the grease can be lubricating oil or lubricating grease.

[0067] According to an embodiment of the present invention, a linear motor 100 is provided in the housing 11 along the axial direction of the housing 11 via a portion of the stator assembly 20. A first cavity 31 and a second cavity 32 are respectively provided between the two axial ends of the stator core 202 of the stator assembly 20 and the housing 11. 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 air gap between the first cavity 31 and the second cavity 32, so that airflow can flow through the air gap between the stator assembly 20 and the mover assembly 10. At the same time, the flow between the first cavity 31 and the second cavity 32 can be realized through the first channel 411, which increases the flow area 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 can move more smoothly relative to each other, which is beneficial to extending the service life of the linear motor 100. Moreover, it is easier and simpler to process the first channel 411 on the first sliding bearing 41, which is beneficial to reducing production costs.

[0068] In some embodiments of the present invention, such as Figures 1-7 As shown, the outer casing 11 includes a casing body 111 and guide posts 112, and a portion of the stator assembly 20 is along the axial direction of the casing body 111 (e.g., Figure 1 The guide post 112 is located inside the shell body 111 (shown in the up-down direction). A guide hole 21 is formed on the stator assembly 20. The guide post 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 post 112 and the guide hole 21.

[0069] Therefore, when the stator assembly 20 and the mover assembly 10 move relative to each other, the guide hole 21 and the guide rod cooperate to guide and limit the movement of the guide rod, ensuring the coaxiality of the stator assembly 20 and the mover assembly 10, ensuring that the guide rod moves along a set direction and a set trajectory, preventing the guide rod from detaching from the stator assembly 20 during sliding, and enabling the guide rod to guide the movement of the mover assembly 10.

[0070] At the same time, such as Figure 1 , Figure 2 , Figures 4-8 As shown, the first sliding bearing 41 is disposed between the outer peripheral wall of the guide post 112 and the hole 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 hole wall of the guide hole 21 can be reduced by the first sliding bearing 41, which helps to reduce the degree of wear and extend the service life of the linear motor 100.

[0071] In addition, such as Figure 1 , Figure 2 , Figures 4-6As shown, the guide hole 21 and the second cavity 32 are connected. The first cavity 31 and the guide hole 21 are connected through the first channel 411. That is, the airflow of the first cavity 31 can flow through the first channel 411 to the guide hole 21 and then through the guide hole 21 to the second cavity 32. Alternatively, the airflow of the second cavity 32 can flow through the guide hole 21 from the first channel 411 to the first cavity 31, so that the first cavity 31 and the second cavity 32 are connected, which meets the required connection requirements. This allows the airflow to flow from both the radial inner and radial outer sides 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. This makes the mutual movement of the stator assembly 20 and the mover assembly 10 smoother and easier to manufacture, which helps to reduce the production cost of the linear motor 100.

[0072] In some embodiments, to meet the coaxiality requirements of the linear motor 100, the gap between the guide post 112 and the first sliding bearing 41 is made small. When the guide post 112 and the first sliding bearing 41 are engaged, due to mutual friction, for example, when the load is large or the moving part assembly 10 moves at a high speed in the axial direction of the stator assembly 20, the temperature of the guide post 112 and the first sliding bearing 41 gradually increases, causing both the first sliding bearing 41 and the guide post 112 to heat up and expand, which easily leads to an interference fit between the guide post 112 and the first sliding bearing 41.

[0073] Therefore, as Figure 7 and Figure 8 As shown, the first channel 411 is provided on the first sliding bearing 41, so that the airflow between the first cavity 31 and the guide hole 21 can flow through the first channel 411 to avoid blockage and other problems, and make the stator assembly 20 and the mover assembly 10 move more smoothly to each other.

[0074] In some embodiments, such as Figure 2 , Figures 5-8 As shown, a third through groove 211 is provided on the wall of the guide hole 21. The third through groove 211 can further increase the 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 to the first channel 411 through the third through groove 211, so that the first cavity 31 and the second cavity 32 can be connected, thus meeting the required connection requirements. 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 mutual movement of the stator assembly 20 and the mover assembly 10 smoother, which is beneficial to extending the service life of the linear motor 100.

[0075] In some embodiments, such as Figure 2 , Figures 5-8 As shown, the third through groove 211 is along the axial direction of the guide hole 21 (e.g., Figure 8 The vertical extension shown in the diagram allows the airflow to pass through the third channel 211 more smoothly, avoiding problems such as obstruction.

[0076] In some embodiments, such as Figure 2 , Figures 5-8 As shown, there are multiple third through slots 211 (two or more). The multiple third through slots 211 are spaced apart along the circumferential direction of the guide hole 21. The multiple third through slots 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 mover assembly 10, and making the mutual movement of the stator assembly 20 and the mover assembly 10 smoother.

[0077] In some embodiments, such as Figure 2 , Figure 7 and Figure 8 As shown, the guide hole 21 has a mounting groove 212 on its wall. The first sliding bearing 41 is located in the mounting groove 212, and one end of the first sliding bearing 41 in the length direction abuts against the side wall of the mounting groove 212. The other end of the first sliding bearing 41 in the length direction is provided with a first stop member 24, which abuts against the other end of the first sliding bearing 41 in the length direction. The side wall of the mounting groove 212 and the first stop member 24 can jointly limit the axial direction of the first sliding bearing 41, ensuring the accurate assembly position of the first sliding bearing 41, enhancing the connection stability of the first sliding bearing 41 on the stator assembly 20, reducing the possibility of the first sliding bearing 41 falling off or moving due to the vibration of the stator assembly 20 when the linear motor 100 is working, and making full use of the space in the axial direction of the stator assembly 20, so that the structure of the first stop member 24 and the first sliding bearing 41 is compact.

[0078] In some embodiments, the first sliding bearing 41 is interference-fitted with the wall of the guide hole 21, or the first sliding bearing 41 is connected by a key to ensure that the first sliding bearing 41 is securely fixed.

[0079] In some embodiments, such as Figure 2 , Figure 7 and Figure 8 As shown, 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 the first sliding bearing 41 moving or falling off.

[0080] In some embodiments, the first stop member 24 can be an elastic retaining ring or a metal ring, which makes the first stop member 24 have high structural strength and high wear resistance, can block the movement of the first sliding bearing 41 in the axial direction, and helps to extend the service life of the linear motor 100.

[0081] According to some embodiments of the present invention, such as Figure 1 and Figure 12 As shown, the stator assembly 20 is provided with an opening 25, which connects the guide hole 21 and the second cavity 32. This can meet the communication requirements of the guide hole (21) and the second cavity 32. The structure is simple and easy to process and manufacture, which helps to reduce production costs.

[0082] In some embodiments, such as Figures 1-5 As shown, the stator assembly 20 includes a stator spindle 201 and a winding. An opening 25 is provided on the stator spindle 201, and the winding is sleeved on the stator spindle 201. The opening 25 is located on the side of the winding near the second cavity 32 (e.g., Figure 1 As shown on the upper side, the linear motor 100 also includes a conductive component located within the stator spindle 201. This conductive component is connected to the windings via an opening 25, enabling the conductive component to supply power to the windings and allowing the linear motor to operate normally. Simultaneously, the opening 25 allows for both ventilation and electrical connection, resulting in a compact structure and ensuring the structural strength of the stator assembly 20.

[0083] In some embodiments of the present invention, such as Figure 7 and Figure 8 As shown, the first channel 411 is along the axial direction of the first sliding bearing 41 (e.g., Figure 8 The structure extends in the vertical direction shown in the diagram, allowing the airflow to pass through the first channel 411 more smoothly, avoiding problems such as obstruction. It also has a simple structure, making it easy to process and manufacture the first sliding bearing 41, which helps to reduce production costs.

[0084] According to some embodiments of the present invention, such as Figure 7 , Figure 8 and Figure 10 As shown, there are multiple first channels 411 (two or more). The multiple first channels 411 are spaced apart along the circumferential direction of the first sliding bearing 41. The multiple first channels 411 can increase the flow area, making the airflow smoother, thereby reducing the resistance to the mutual movement of the stator assembly 20 and the mover assembly 10, and making the mutual movement of the stator assembly 20 and the mover assembly 10 smoother.

[0085] 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 formed on the first sliding bearing 41 as shown in the figure. Figure 10 The multiple through slots shown, or the multiple first channels 411, can be through holes and through slots formed on the first sliding bearing 41. They can all meet the need to increase the air gap between the first cavity 31 and the second cavity 32, which is beneficial to increase the flow area. Moreover, the structure is simple and easy to process and manufacture.

[0086] In some embodiments, such as Figure 7 , Figure 10 and Figure 13 As shown, the multiple first channels 411 are grooves located on the inner peripheral wall of the first sliding bearing 41, which makes the structure of the first channel 411 simple, facilitates the processing and manufacturing of the first channel 411, and helps to reduce the production cost of the first sliding bearing 41.

[0087] According to some embodiments of the present invention, such as Figure 7 , Figure 10 and Figure 13 As shown, the multiple first channels 411 include a first groove 81 and a second groove 82. While meeting the airflow requirements, it can avoid the first sliding bearing 41 having too many first channels 411 on its inner peripheral wall, thus affecting the accuracy of the inner peripheral wall of the first sliding bearing 41 and ensuring the load-bearing capacity of the first sliding bearing 41.

[0088] In addition, such as Figure 7 and Figure 10 As shown, the first groove 81 and the second groove 82 are arranged opposite to each other, so that the first groove 81 and the second groove 82 are symmetrically arranged along 180°. When assembling the first sliding bearing 41, the first sliding bearing 41 can be easily squeezed and installed by the opposite first groove 81 and the second groove 82, making the assembly of the first sliding bearing 41 more convenient and improving the assembly efficiency.

[0089] In some embodiments, grease is present between the first sliding bearing 41 and the mover assembly 10. The grease can lubricate the relative movement between the stator assembly 20 and the mover assembly 10, making the relative movement between the stator assembly 20 and the mover assembly 10 smoother and effectively reducing friction.

[0090] In related technologies, when a linear motor is working, the grease on the inner circumferential wall of the first sliding bearing is easily carried away when the mover assembly and stator assembly move relative to each other, reducing the amount of grease, which worsens the lubrication environment, increases the wear of the first sliding bearing, and reduces its service life.

[0091] Therefore, in some embodiments, such as Figure 7 , Figure 8 and Figure 10 As shown, the first channel 411 is filled with grease. The grease does not block the first channel 411, allowing a portion of the grease to be stored, thereby increasing the amount of grease between the first sliding bearing 41 and the mover assembly 10, serving as a reserve grease. When the mover assembly 10 and the stator assembly 20 move relative to each other, the grease stored in the first channel 411 can replenish lubrication in a timely manner, effectively improving the lubrication environment between the first sliding bearing 41 and the mover assembly 10. Continuous lubrication of the first sliding bearing 41 improves the lubrication environment between the mover assembly 10 and the first sliding bearing 41, reducing wear on the inner peripheral wall of the first sliding bearing 41 and extending its service life. Simultaneously, because the grease does not block the first channel 411, it meets the requirement of increasing the air gap between the first cavity 31 and the second cavity 32, which helps to increase the flow area. Furthermore, the structure is simple and easy to manufacture.

[0092] In embodiments of the present invention, the specific shape of the first channel 411 can be set according to actual conditions. For example, the first channel 411 can be formed as a square groove, a triangular groove, etc.

[0093] For example, in some embodiments, such as Figure 10 As shown, the first channel 411 is formed as an arc-shaped groove, which can avoid stress concentration and other problems on the first sliding bearing 41 and is conducive to improving the structural strength of the first sliding bearing 41.

[0094] In some embodiments of the present invention, such as Figure 13 As shown, the multiple first channels 411 are unevenly distributed along the circumferential direction of the first sliding bearing 41. That is, along the circumferential direction of the first channels 411, the spacing between any two adjacent first channels 411 is different, which can effectively reduce noise, vibration and acoustic roughness (NVH) problems and meet the required usage requirements.

[0095] For example, in some embodiments, when the linear motor 100 is used in the suspension assembly of a vehicle, since the load-bearing capacity of the linear motor 100 is different at different parts in the circumferential direction, a relatively sparse first channel 411 is opened at the position with a larger load-bearing capacity, and a relatively dense first channel 411 is opened on the opposite side of the position with a larger load-bearing capacity, which can improve the service life of the first sliding bearing 41.

[0096] According to some embodiments of the present invention, such as Figure 1 , Figures 3-6 and Figure 9 As shown, the axial direction of the housing 11 (e.g.) Figure 1The upper end shown is open, forming an open hole 113. A portion of the stator assembly 20 passes through the open hole 113, allowing the portion of the stator assembly 20 to be located inside the housing 11 through the open hole 113, thus enabling the movement between the mover assembly 10 and the stator assembly 20.

[0097] In addition, such as Figure 3 and Figure 9 As shown, a sealing element 50 is provided between the wall of the open hole 113 and the outer peripheral wall of the stator assembly 20. The sealing element 50 can meet the sealing requirements 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. This protects the internal structure of the linear motor 100 and helps extend its service life. For example, the sealing element 50 can be an oil seal.

[0098] In some embodiments of the present invention, such as Figure 1 , Figure 3 , Figure 4 , Figure 6 , Figure 9 and Figure 11 As shown, a second sliding bearing 42 is also provided between the 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 wear, and extend the service life of the linear motor 100. The second sliding bearing 42 is located on the side of the seal 50 near the second cavity 32 (e.g., Figure 3 (as shown on the lower side), so that the seal 50 can block external impurities from entering the second sliding bearing 42 through the open hole 113, avoiding wear and other problems to the second sliding bearing 42, and helping to extend its service life.

[0099] In some embodiments, such as Figure 3 , Figure 9 and Figure 11 As shown, a fourth cavity 34 is defined between the second sliding bearing 42 and the seal 50. A second channel 421 is provided on the second sliding bearing 42 to connect the second cavity 32 and the fourth cavity 34. This allows airflow to pass through the second channel 421 between the second cavity 32 and the fourth cavity 34, which helps to regulate the pressure difference between the fourth cavity 34 and the second cavity 32, preventing the seal 50 from failing due to pressure, ensuring reliable sealing, and extending the service life of the linear motor 100. Furthermore, machining the second channel 421 on the second sliding bearing 42 is easier, simplifying the process and reducing production costs.

[0100] In some embodiments, the second channel 421 may be a through hole formed on the second sliding bearing 42, or the second channel 421 may be formed on the second sliding bearing 42 as shown in the figure. Figure 11 The through slots shown can all meet the requirements of connecting the second cavity 32 and the fourth cavity 34, and have a simple structure that is easy to process and manufacture.

[0101] In some embodiments, the second sliding bearing 42 can be integrally formed, which facilitates the processing and manufacturing of the second sliding bearing 42 and helps to reduce production costs. 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. Grease is filled into the air holes under high pressure, and the grease can lubricate the relative movement between the stator assembly 20 and the mover assembly 10, making the relative movement of the stator assembly 20 and the mover assembly 10 smoother and effectively reducing friction.

[0102] In some embodiments, the outer peripheral wall of the second sliding bearing 42 and the hole wall of the open hole 113 are interference-fitted to ensure that the second sliding bearing 42 is reliably fixed on the stator assembly 20.

[0103] According to some embodiments of the present invention, such as Figure 3 , Figure 9 and Figure 11 As shown, the second sliding bearing 42 includes a body portion 422, through which the stator assembly 20 passes. The body portion 422 can guide the stator assembly 20 to ensure reliable movement of the stator assembly 20. The second channel 421 is provided on the body portion 422 to facilitate airflow through the second channel 421 and facilitate processing and manufacturing.

[0104] In addition, such as Figure 3 , Figure 9 and Figure 11 As shown, the second sliding bearing 42 also includes a stop portion 423, which is disposed on the outer peripheral wall of the body portion 422 and extends along the circumferential direction of the body portion 422. One axial end of the stop portion 423 (e.g.) Figure 3 The lower end shown in the figure abuts against the moving part assembly 10, so that the moving part assembly 10 can limit the second sliding bearing 42 and ensure that the second sliding bearing 42 is accurately assembled on the housing 11.

[0105] In some embodiments, such as Figure 3 and Figure 9 As shown, the side of the stop portion 423 facing the open hole 113 (e.g.) Figure 3The upper side shown in the figure is provided with a second stop member 12, which abuts against the side of the stop part 423 facing the open hole 113. The axial end of the stop part 423 abuts against the mover assembly 10, and the abutment of the second stop member 12 against the side of the stop part 423 facing the open hole 113 can achieve axial positioning of the second sliding bearing 42, ensure the accurate assembly position of the second sliding bearing 42, enhance the connection stability of the second sliding bearing 42 on the mover assembly 10, reduce 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, and make full use of the space in the axial direction of the mover assembly 10, so that the structure of the second stop member 12 and the second sliding bearing 42 is compact.

[0106] In some embodiments, such as Figure 3 and Figure 9 As shown, 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 the second sliding bearing 42 moving or falling off.

[0107] In some embodiments, the second stop member 12 can be an elastic retaining ring or a metal ring, which makes the second stop member 12 have high structural strength and wear resistance, can effectively block the movement of the second stop member 12 in the axial direction, and is conducive to extending the service life of the linear motor 100.

[0108] According to some embodiments of the present invention, such as Figure 1 , Figures 3-6 , Figure 9 As shown, a boss 13 is provided on the inner wall surface of the end of the housing 11 with the open hole 113. The boss 13 surrounds the open hole 113, which helps to improve the structural strength of the housing 11. 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 facilitates the placement of the second sliding bearing 42 and reduces the thickness of the housing 11 at the open hole 113, which helps to reduce the material cost of the housing 11.

[0109] In some embodiments, such as Figure 3 and Figure 9 As shown, the seal 50 and the second stop 12 are spaced apart in the axial direction of the housing 11, which can prevent interference between the seal 50 and the second stop 12, ensure the sealing function of the seal 50 and the limiting function of the second stop 12 on the second sliding bearing 42, and meet the required usage requirements.

[0110] In some embodiments of the present invention, such as Figure 3 , Figure 9 and Figure 11 As shown, the second channel 421 is along the axial direction of the second sliding bearing 42 (e.g., Figure 3 The extension (as shown in the vertical direction) allows the airflow to flow more smoothly through the second channel 421, avoiding problems such as obstruction. The structure is simple, making it easy to process and manufacture the second sliding bearing 42, which helps to reduce production costs.

[0111] According to some embodiments of the present invention, such as Figure 11 As shown, there are multiple second channels 421 (two or more). The multiple second channels 421 are spaced apart along the circumferential direction of the second sliding bearing 42. The multiple second channels 421 can increase the flow area, making the airflow smoother and avoiding problems such as failure of the seal 50 due to pressure, thus ensuring the reliable sealing of the seal 50.

[0112] In some embodiments, such as Figure 11 As shown, the multiple second channels 421 are grooves located on the inner peripheral wall of the second sliding bearing 42, which makes the structure of the second channel 421 simple, facilitates the processing and manufacturing of the second channel 421, and helps to reduce the production cost of the second sliding bearing 42.

[0113] According to some embodiments of the present invention, such as Figure 11 As shown, the multiple second channels 421 include a third groove 83 and a fourth groove 84. While meeting the airflow requirements, they can avoid the second sliding bearing 42 having too many second channels 421 on its inner peripheral wall, which would affect the accuracy of the inner peripheral wall of the second sliding bearing 42 and ensure the load-bearing capacity of the second sliding bearing 42.

[0114] In addition, such as Figure 11 As shown, the third groove 83 and the fourth groove 84 are arranged opposite to each other, that is, the third groove 83 and the fourth groove 84 are symmetrically arranged along 180°. When assembling the second sliding bearing 42, the relative third groove 83 and the fourth groove 84 can facilitate the pressing and installation of the second sliding bearing 42, making the assembly of the second sliding bearing 42 more convenient and improving the assembly efficiency.

[0115] In embodiments of the present invention, the specific shape of the second channel 421 can be set according to actual conditions. For example, the second channel 421 can be formed as a square groove, a triangular groove, etc.

[0116] For example, in some embodiments, such as Figure 11 As shown, the second channel 421 is formed as an arc-shaped groove, which can avoid stress concentration and other problems on the second sliding bearing 42, and is conducive to improving the structural strength of the second sliding bearing 42.

[0117] In some embodiments of the present invention, the plurality of second channels 421 are unevenly distributed along the circumferential direction of the second sliding bearing 42, that is, along the circumferential direction of the second sliding bearing 42, the spacing between any two adjacent second channels 421 is different, which can effectively reduce noise, vibration and acoustic roughness (NVH) problems and meet the required usage requirements.

[0118] For example, in some embodiments, when the linear motor 100 is used in the suspension assembly of a vehicle, since the load-bearing capacity of the linear motor 100 is different at different parts in the circumferential direction, a relatively sparse second channel 421 is opened at the position with a larger load-bearing capacity, and a relatively dense second channel 421 is opened on the opposite side of the position with a larger load-bearing capacity, which can improve the service life of the second sliding bearing 42.

[0119] In some embodiments, grease is present between the second sliding bearing 42 and the stator assembly 20. The grease can lubricate the relative movement between the stator assembly 20 and the mover assembly 10, making the relative movement between the stator assembly 20 and the mover assembly 10 smoother and effectively reducing friction.

[0120] In related technologies, when a linear motor is working, the grease on the inner circumferential wall of the second sliding bearing is easily carried away when the mover assembly and stator assembly move relative to each other, reducing the amount of grease, worsening the lubrication environment, increasing the wear of the second sliding bearing, and reducing its service life.

[0121] Therefore, in some embodiments of the present invention, such as Figure 3 , Figure 9 and Figure 11 As shown, the second channel 421 is filled with grease. The grease does not block the second channel 421, and 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, serving as a reserve grease. When the mover assembly 10 and the stator assembly 20 move relative to each other, the grease stored in the second channel 421 can replenish lubrication in a timely manner, effectively improving the lubrication environment between the second sliding bearing 42 and the stator assembly 20. Continuous lubrication of the second sliding bearing 42 can improve the lubrication environment of the stator assembly 20 and the second sliding bearing 42, reduce wear on the inner peripheral wall of the second sliding bearing 42, and help extend its service life.

[0122] In some embodiments where there are multiple second channels 421, the multiple second channels 421 can be multiple through holes formed on the second sliding bearing 42, or the multiple second channels 421 can be formed on the second sliding bearing 42 as shown in the figure. Figure 11The multiple through slots shown, or multiple second channels 421, can be through holes and through slots formed on the second sliding bearing 42, which can meet the requirements of connecting the second cavity 32 and the fourth cavity 34, which is beneficial to increase the flow area, and the structure is simple and easy to process and manufacture.

[0123] In some embodiments, such as Figure 3 , Figure 9 and Figure 11 As shown, the through groove formed on the second sliding bearing 42 is located on the inner peripheral wall of the second sliding bearing 42, and a through hole is formed on the second sliding bearing 42. Grease is stored in the through groove formed on the second sliding bearing 42, which can store a large amount of grease, thereby increasing the amount of grease between the first sliding bearing 41 and the mover assembly 10, serving as a reserve grease. At the same time, the through hole formed on the second sliding bearing 42 can meet the requirement of connecting the second cavity 32 and the fourth cavity 34, which is beneficial to increasing the flow area, and the structure is simple and easy to process and manufacture.

[0124] According to some embodiments of the present invention, such as Figure 1 , Figure 3 , Figure 5 and Figure 6 As shown, a vent valve 60 is provided on the side wall of the outer casing 11. The vent valve 60 can connect the first cavity 31 or the second cavity 32 to the external environment. That is, the vent valve 60 can connect the first cavity 31 to the external environment, or the second cavity 32 to the external environment, allowing the gas in the first cavity 31 or the second cavity 32 to exchange with the gas in the external environment. This allows for rapid adjustment of 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, it reduces the air resistance caused by the change in volume of the first cavity 31 and the second cavity 32 during compression and stretching, making the mutual movement of the stator assembly 20 and the mover assembly 10 smoother and providing better heat dissipation, which helps to extend the service life of the linear motor 100. In addition, the vent valve 60 can also prevent dust and water from entering the interior of the linear motor 100, improving the reliability of the linear motor 100 and extending its service life.

[0125] Simultaneously, airflow can flow through the air gap between the stator assembly 20 and the mover assembly 10, and the airflow can also flow between the first cavity 31 and the second cavity 32 through the first channel 411. This allows the first cavity 31 or the second cavity 32 to exchange gases through the vent valve 60, facilitating the flow of gas between the first cavity 31 and the second cavity 32. This helps to quickly adjust the pressure in the first cavity 31 and the second cavity 32, reducing or avoiding the pressure difference between the first cavity 31 and the second cavity 32, and making the pressure in the first cavity 31 and the second cavity 32 equal. This reduces or avoids the reciprocating motion of the linear motor 100 being affected by the pressure difference and causing fluctuations, thereby improving sensitivity.

[0126] It should be noted that the external environment can be the space outside the linear motor 100. When the external environment is the space outside the linear motor 100, it can be part of the outside atmosphere. The external environment can also be the space inside the linear motor 100. When the external environment is the space inside the linear motor 100, it can be connected to the outside atmosphere or isolated from the outside atmosphere.

[0127] In some embodiments, such as Figure 3 As shown, the vent valve 60 does not extend beyond the outer peripheral wall of the housing 11, which makes the overall structure of the vent valve 60 and the mover assembly 10 more compact, and avoids problems such as interference between the vent valve 60 and the external structure of the mover assembly 10 due to the vent valve 60 extending beyond the outer peripheral wall of the housing 11.

[0128] In some embodiments, the vent valve 60 is detachably mounted on the side wall of the housing 11 to facilitate maintenance or replacement of the vent valve 60.

[0129] In some specific embodiments, such as Figure 3 As shown, the vent valve 60 is threaded to the side wall of the housing 11, which simplifies the connection between the vent valve 60 and the moving part assembly 10 and provides strong stability, making it easy to disassemble or install the vent valve 60 on the housing 11.

[0130] In some embodiments, such as Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 6 As shown, the lower end of the stator assembly 20 is provided with a vibration damping member 23. When the mover assembly 10 moves relative to the stator assembly 20 along the axial direction of the stator assembly 20, the vibration damping member 23 can prevent the mover assembly 10 and the stator assembly 20 from directly contacting each other, thus avoiding vibration and noise problems and ensuring the reliable operation of the linear motor 100.

[0131] The electromagnetic vibration damper 200 according to an embodiment of the present invention includes a linear motor 100 according to an embodiment of the present invention. Since the linear motor 100 according to the embodiment of the present invention has the aforementioned beneficial technical effects, the electromagnetic vibration damper 200 according to an embodiment of the present invention has a portion of the stator assembly 20 disposed within the housing 11 along the axial direction of the housing 11. 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. 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 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, and can also flow between the first cavity 31 and the second cavity 32 through the first channel 411. This increases the flow area 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. This makes the movement of the stator assembly 20 and the mover assembly 10 smoother, which helps to extend the service life of the linear motor 100. In addition, it is easier and simpler to process the first channel 411 on the first sliding bearing 41, which helps to reduce production costs.

[0132] The vehicle according to an embodiment of the present invention includes an electromagnetic vibration damper 200 according to an embodiment of the present invention. Since the electromagnetic vibration damper 200 according to an embodiment of the present invention has the aforementioned beneficial technical effects, the vehicle according to an embodiment of the present invention has a portion of the stator assembly 20 disposed within the housing 11 along the axial direction of the housing 11. 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. A first sliding bearing 41 is provided between the stator assembly 20 and the rotor assembly 10. A first channel 411 is provided on the first sliding bearing 41 to increase the air gap connecting the first cavity 31 and the second cavity 32, thereby allowing air to pass through. The flow can pass through the air gap between the stator assembly 20 and the mover assembly 10, and can also pass through the first channel 411 between the first cavity 31 and the second cavity 32. This increases the flow area 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. This makes the movement of the stator assembly 20 and the mover assembly 10 smoother, which helps to extend the service life of the linear motor 100. In addition, it is easier and simpler to process the first channel 411 on the first sliding bearing 41, which helps to reduce production costs.

[0133] In some embodiments, when the linear motor 100 is applied to a vehicle, the stator assembly 20 can be connected to the vehicle body, and the mover assembly 10 can be connected to the vehicle wheels. For example, the linear motor 100 is placed vertically, the upper end of the stator assembly 20 is connected to the vehicle body, and the lower end of the mover assembly 10 is connected to the wheels. This can meet the installation requirements of the linear motor 100, ensure that the linear motor 100 is reliably installed on the vehicle, and allow the mover assembly 10 to perform reciprocating linear motion relative to the stator assembly 20, thus meeting the required usage requirements.

[0134] In some embodiments, such as Figure 1 , Figure 4 and Figure 6 As shown, the housing 11 is provided with a lower fork arm 70, which is connected to the wheel to meet the required connection requirements.

[0135] The linear motor 100, electromagnetic damper 200, and other components and operations of the vehicle according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0136] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0137] In the description of this specification, the references to terms such as "embodiment," "specific embodiment," and "example" 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.

[0138] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A linear motor, characterized in that, include: A moving part assembly (10) having a housing (11); A stator assembly (20) is provided in the housing (11) along the axial direction of the housing (11). A cavity (31, 32) is provided between the stator assembly (20) and the housing (11). The cavity (31, 32) is in communication with the external environment, which is the space located inside the linear motor.

2. The linear motor according to claim 1, characterized in that, The cavity (31, 32) is connected to the external environment through a vent valve to quickly adjust the pressure inside the cavity (31, 32). The external environment is either connected to or isolated from the outside atmosphere.

3. The linear motor according to claim 2, characterized in that, The vent valve (60) is detachably mounted on the side wall of the housing (11).

4. The linear motor according to claim 2, characterized in that, The vent valve (60) does not extend beyond the outer peripheral wall of the housing (11).

5. The linear motor according to claim 1, characterized in that, One axial end of the housing (11) is open to form an open hole (113), and a portion of the stator assembly (20) passes through the open hole (113); a seal and / or a sliding bearing are provided between the hole wall of the open hole (113) and the outer peripheral wall of the stator assembly (20); when a seal and a sliding bearing are provided between the hole wall of the open hole (113) and the outer peripheral wall of the stator assembly (20), the sliding bearing is located on the side of the seal closer to the cavity (31, 32).

6. The linear motor according to claim 1, characterized in that, A first sliding bearing (41) is provided between the stator assembly (20) and the mover assembly (10), and grease is stored between the first sliding bearing (41) and the mover assembly (10).

7. The linear motor according to claim 1, characterized in that, The cavities (31, 32) include a first cavity (31) and a second cavity (32). The stator assembly includes a stator core (202). The first cavity (31) and the second cavity (32) are formed between the axial ends of the stator core (202) and the outer shell. 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 air gap between the first cavity (31) and the second cavity (32).

8. The linear motor according to claim 1, characterized in that, The outer casing (11) includes: The shell body (111) contains a portion of the stator assembly (20) disposed within the shell body (111) along the axial direction of the shell body (111); A guide post (112) is disposed inside the housing body (111). A guide hole (21) is formed on the stator assembly (20). The guide post (112) extends along the axial direction of the stator assembly (20) and extends into the guide hole (21). The guide hole (21) communicates with the second cavity (32). The first sliding bearing (41) is disposed between the outer peripheral wall of the guide post (112) and the hole wall of the guide hole (21). The first cavity (31) and the guide hole (21) communicate through the first channel (411).

9. The linear motor according to claim 8, characterized in that, The stator assembly (20) is provided with an opening (25), which connects the guide hole (21) and the second cavity (32).

10. The linear motor according to claim 9, characterized in that, The stator assembly (20) includes: Stator mandrel (201), the opening (25) is provided on the stator mandrel (201); The winding is sleeved on the stator mandrel (201), and the opening (25) is located on the side of the winding near the second cavity (32). The linear motor (100) also includes a conductive component, which is located inside the stator mandrel (201) and connected to the winding through the opening (25).

11. The linear motor according to claim 1, characterized in that, The first channel (411) extends along the axial direction of the first sliding bearing (41); the first channel (411) is a plurality of channels spaced apart along the circumferential direction of the first sliding bearing (41); the plurality of first channels (411) are grooves located on the inner circumferential wall of the first sliding bearing (41).

12. The linear motor according to claim 11, characterized in that, The plurality of the first channels (411) are unevenly distributed along the circumferential direction of the first sliding bearing (41).

13. The linear motor according to claim 1, characterized in that, The outer casing (11) is open at one axial end to form an open hole (113), a portion of the stator assembly (20) passes through the open hole (113), and a sealing element (50) is provided between the hole wall of the open hole (113) and the outer peripheral wall of the stator assembly (20). A second sliding bearing (42) is also 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 the side of the seal (50) near the second cavity (32); A fourth cavity (34) is defined between the second sliding bearing (42) and the seal (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); The second channel (421) extends along the axial direction of the second sliding bearing (42); A boss (13) is provided on the inner wall surface of the end of the housing (11) where the open hole (113) is located. The boss (13) surrounds the open hole (113). 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).

14. The linear motor according to claim 13, characterized in that, The second sliding bearing (42) includes: The main body (422) has the stator assembly (20) passing through it, and the second channel (421) is provided on the main body (422). A stop portion (423) is provided on the outer peripheral wall of the body portion (422) and extends along the circumferential direction of the body portion (422). One axial end of the stop portion (423) abuts against the outer shell (11).

15. An electromagnetic vibration damper, characterized in that, Includes the linear motor (100) according to any one of claims 1-14.

16. A vehicle, characterized in that, Including the electromagnetic vibration damper according to claim 18.

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