Stator assembly, linear motor, suspension system, and vehicle

Abstract

The present application discloses a stator assembly, a linear motor, a suspension system, and a vehicle. The stator assembly comprises a stator core shaft and a winding assembly; the stator core shaft comprises a shaft wall, a cooling water channel extending in the axial direction of the shaft wall is arranged in the shaft wall, a water channel opening is formed on the shaft wall, and the water channel opening is communicated with a first end of the cooling water channel; the winding assembly is sleeved on the periphery of the stator core shaft; the cooling water channel comprises a first cooling water channel, the first cooling water channel exchanges heat with the winding assembly, and the cross-sectional area of at least part of the first cooling water channel is greater than the area of the water channel opening. The stator assembly designed according to the present application has a reduced number of components, enhanced heat dissipation effect, and improved operational reliability.

Description

Stator assemblies, linear motors, suspension systems and vehicles

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on March 29, 2024, with application number: 202410384600.6, and invention name: "Stator assembly, linear motor, suspension system and vehicle", the entire content of which is incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of vehicles, and in particular to a stator assembly, a linear motor, a suspension system and a vehicle. Background Art

[0003] In related technologies, linear motors have a rotor and a stator. When operating, these motors generate heat, which is typically dissipated through natural cooling. However, this heat dissipation is poor, resulting in poor operating efficiency. In some existing technologies, linear motors are equipped with cooling channels through which coolant flows to exchange heat with the motor. However, in these technologies, the cooling channels are independent of the linear motor, making it difficult to effectively exchange heat with the rotor or stator. These linear motors suffer from numerous parts, high costs, and poor cooling.

[0004] Summary of the Invention

[0005] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present application is to provide a stator assembly. The stator assembly designed according to the present application has a small number of parts, good heat dissipation, and more reliable operation.

[0006] The present application also proposes a linear motor having the above-mentioned stator assembly.

[0007] The present application also proposes a suspension system having the above linear motor.

[0008] The present application also provides a vehicle having the above suspension system.

[0009] In a first aspect, the stator assembly according to the present application includes: a stator core shaft, the stator core shaft includes a shaft wall, a cooling water channel extending axially thereof is provided in the shaft wall, a water channel opening is provided on the shaft wall, and the water channel opening is connected to a first end of the cooling water channel; a winding assembly, the winding assembly is sleeved on the outer circumference of the stator core shaft; wherein the cooling water channel includes a first cooling water channel, the first cooling water channel exchanges heat with the winding assembly, and the cross-sectional area of ​​at least part of the first cooling water channel is larger than the area of ​​the water channel opening.

[0010] According to the stator assembly of the present application, a cooling water channel is provided inside the wall of the stator core shaft so that the stator core shaft integrates a cooling function, thereby reducing the number of parts of the stator assembly and reducing the manufacturing cost of the stator assembly. In addition, the stator core shaft exchanges heat with the winding assembly through the first cooling water channel. The cross-sectional area of ​​the first cooling water channel is larger than the area of ​​the water channel opening, which can increase the contact area between the first cooling water channel and the winding assembly, thereby improving the heat dissipation effect.

[0011] According to some embodiments of the present application, the water channel opening is formed by the cooling water channel penetrating the first axial end of the shaft wall.

[0012] According to some embodiments of the present application, the cooling water channel further includes a second cooling water channel. In the axial direction of the stator core shaft, the second cooling water channel and the first cooling water channel are arranged sequentially, and the water channel opening is directly connected to the second cooling water channel.

[0013] According to some embodiments of the present application, a cross-sectional area of ​​the first cooling water channel is greater than a cross-sectional area of ​​the second cooling water channel.

[0014] According to some embodiments of the present application, a cross-sectional area of ​​the second cooling water channel is larger than a cross-sectional area of ​​the water channel opening.

[0015] According to some embodiments of the present application, in the radial direction of the stator core shaft, the second cooling water channel is arranged further outward than the first cooling water channel, a guide channel is provided between the first cooling water channel and the second cooling water channel, and the wall thickness of the stator core shaft at the guide channel is greater than the wall thickness of the stator core shaft at the position where the first cooling water channel and the guide channel are connected.

[0016] According to some embodiments of the present application, on the circumference of the stator core shaft, there are multiple first cooling water channels and they are arranged along the circumference, at least two of the first cooling water channels are connected to the same second cooling water channel, and the sum of the cross-sectional areas of the at least two first cooling water channels is greater than the cross-sectional area of ​​the same second cooling water channel connected to them.

[0017] According to some embodiments of the present application, a reinforcing rib is provided between two adjacent first cooling water channels.

[0018] According to some embodiments of the present application, the first cooling water channel includes a first liquid inlet water channel section and a first liquid outlet water channel section arranged at intervals in the circumferential direction of the stator core shaft, and the first liquid inlet water channel section and the first liquid outlet water channel section are connected at one end away from the water channel opening.

[0019] According to some embodiments of the present application, the second cooling water channel includes a second liquid inlet water channel section and a second liquid outlet water channel section, the inlet end of the second liquid inlet water channel section is connected to the inlet of the water channel opening, the outlet end of the second liquid inlet water channel section is connected to the inlet end of the first liquid inlet water channel section, the inlet end of the second liquid outlet water channel section is connected to the outlet end of the first liquid outlet water channel section, and the outlet end of the second liquid outlet water channel section is connected to the outlet of the water channel opening.

[0020] According to some embodiments of the present application, the central angle corresponding to the circumference of the first liquid inlet water channel section is a first central angle α, and the central angle corresponding to the circumference of the second liquid inlet water channel section is a second central angle β, and α>β.

[0021] According to some embodiments of the present application, the central angle corresponding to the circumference of the first liquid outlet water channel section is a third central angle θ, and the central angle corresponding to the circumference of the second liquid outlet water channel section is a fourth central angle γ, where θ>γ.

[0022] The following briefly describes the linear motor according to the second embodiment of the present application.

[0023] The linear motor according to the present application includes: a stator assembly according to any one of the above-described embodiments and a mover assembly, wherein the mover assembly and the stator assembly are relatively movable. Because the linear motor according to the present application includes the stator assembly according to the above-described embodiments, the linear motor has fewer parts, better heat dissipation, and more reliable operation.

[0024] According to some embodiments of the present application, the linear motor further includes: a conductive component, one end of which is connected to the winding component, and the other end is used to connect to the motor controller; the cooling water channel further includes a second cooling water channel, and the second cooling water channel is used for heat exchange with the conductive component.

[0025] According to some embodiments of the present application, the linear motor further includes: a detection device for detecting the displacement of the mover assembly.

[0026] According to some embodiments of the present application, the detection device includes an inductive element and an inductive reading head, the inductive element is arranged on the stator core shaft, the inductive reading head is arranged on the mover assembly, and the inductive reading head is coupled to the inductive element to detect the position of the mover assembly.

[0027] According to some embodiments of the present application, the induction member is disposed on the outer peripheral wall of the stator core shaft, and the stator assembly further includes a covering member, which is disposed on the stator core shaft to cover the induction member.

[0028] According to some embodiments of the present application, an outer peripheral wall of the stator core shaft is provided with a receiving groove, and the induction component is placed in the receiving groove.

[0029] According to some embodiments of the present application, a portion of the circumferential wall of the stator core shaft is recessed inward to define the accommodating groove.

[0030] According to some embodiments of the present application, one axial end of the accommodating groove is open to define a mounting opening of the inductive component, and the stator assembly further includes a blocking component for blocking the mounting opening.

[0031] According to some embodiments of the present application, the accommodating groove and the cooling water channel are staggered in the circumferential direction of the stator core shaft.

[0032] According to some embodiments of the present application, the cover is externally mounted on the outer peripheral wall of the stator core shaft.

[0033] According to some embodiments of the present application, the covering member includes a first body portion and a cover plate, wherein the cover plate is fixed to the first body portion and is arranged radially opposite to the sensing member.

[0034] According to some embodiments of the present application, the induction component is a magnetic induction component, and the covering component is made of a non-magnetic material.

[0035] The following briefly describes the suspension system according to the third embodiment of the present application.

[0036] The suspension system according to the present application includes the linear motor described in any one of the above embodiments. Since the suspension system according to the present application is provided with the linear motor described in the above embodiments, the suspension system has a higher degree of integration, fewer parts, lower manufacturing costs, and better heat dissipation effect.

[0037] The following briefly describes a vehicle according to an embodiment of the fourth aspect of the present application.

[0038] The vehicle according to the present application includes the suspension system described in the above embodiment. Since the vehicle according to the present application is provided with the suspension system of the above embodiment, the driving comfort of the vehicle is higher and the user experience is better.

[0039] In summary, according to the stator assembly of the present application, the stator core shaft thereof is integrated with a cooling function, the stator assembly has a small number of parts, a low manufacturing cost, and a better heat dissipation effect.

[0040] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application.

[0041] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0043] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0044] FIG1 is an overall structural diagram of a linear motor according to an embodiment of the present application.

[0045] FIG2 is a cross-sectional view of a partial structure of a linear motor according to an embodiment of the present application.

[0046] FIG3 is an enlarged view of circle A in FIG2 .

[0047] FIG4 is an enlarged view of part of the structure in FIG2 .

[0048] FIG5 is an overall structural diagram of a stator assembly according to an embodiment of the present application.

[0049] FIG6 is a schematic diagram of a partial structure of a stator assembly according to an embodiment of the present application.

[0050] FIG7 is an enlarged view of circle B in FIG6 .

[0051] FIG8 is a schematic diagram of the structure of the connection between the adapter and the conductive component according to an embodiment of the present application.

[0052] FIG9 is a schematic structural diagram of an adapter according to an embodiment of the present application.

[0053] FIG10 is a schematic structural diagram of a winding assembly according to an embodiment of the present application.

[0054] FIG11 is a schematic diagram of a partial coil disk structure according to an embodiment of the present application.

[0055] FIG12 is a schematic structural diagram of the stator core shaft and the winding assembly according to an embodiment of the present application.

[0056] FIG13 is a cross-sectional view of the structure in FIG11.

[0057] FIG14 is a schematic diagram of the stator core structure according to an embodiment of the present application.

[0058] FIG15 is an enlarged view of circle D in FIG13.

[0059] FIG16 is a schematic diagram of electrical connections of a portion of an insulating skeleton according to an embodiment of the present application.

[0060] FIG17 is a schematic diagram of the spacing between bridge ducts according to an embodiment of the present application.

[0061] FIG18 is a structural diagram of a stator core shaft according to an embodiment of the present application.

[0062] FIG19 is a top view of a stator core shaft according to an embodiment of the present application.

[0063] FIG. 20 is another perspective of the structure in FIG. 18 .

[0064] FIG21 is a schematic diagram of an induction element provided on the outer surface of a stator core shaft according to an embodiment of the present application.

[0065] FIG. 22 is another perspective of the structure in FIG. 21 .

[0066] FIG23 is a schematic diagram of the structure of a cover according to an embodiment of the present application.

[0067] Figure 24 is a schematic diagram of the structure of the cover after separation according to an embodiment of the present application.

[0068] FIG25 is a schematic diagram of the conductive component structure according to an embodiment of the present application.

[0069] FIG. 26 is an enlarged view of circle C in FIG. 25 .

[0070] FIG27 is a second perspective of the structure in FIG25.

[0071] FIG28 is a third perspective of the structure in FIG25.

[0072] Figure 29 is a cross-sectional view of the stator core shaft portion according to an embodiment of the present application.

[0073] Figure 30 is a schematic diagram of the water channel joint structure according to an embodiment of the present application.

[0074] FIG31 is a cross-sectional view of a stator core shaft according to an embodiment of the present application.

[0075] FIG32 is another perspective of the structure in FIG31 .

[0076] Figure 33 is a schematic diagram of the cooling water channel (virtual body) inside the stator core shaft wall according to an embodiment of the present application.

[0077] Figure 34 is a schematic diagram of a suspension system according to an embodiment of the present application.

[0078] Figure 35 is a schematic diagram of a vehicle according to an embodiment of the present application.

[0079] Reference Signs: 1000, suspension system; 10000, vehicle; 1, linear motor; 10, mover assembly; 11, excitation assembly; 12, guide post; 121, guide portion; 122, fixing portion; 13, housing; 13a, first chamber; 130, gas channel; 13b, second ventilation channel; 14, sliding bearing; 14a, first ventilation channel; 15, cover; 20, stator assembly; 21, stator core shaft; 210, shaft wall; 21a, accommodating groove; 21b, mounting opening; 21c, wiring space; 21d, connection notch; 21e, guide hole; 21f, second mounting hole; 21g, center hole; 21h, accommodating groove; 2101a, first cooling water channel; 21011a, first liquid inlet water channel section; 21012a, first liquid outlet water channel section; 2102a, second cooling water channel; 21021a, second liquid inlet water channel section; 21022a, second liquid outlet water channel section; 2103a, diversion channel; 210b, water channel opening; 212, second positioning member; 213, limiting protrusion; 214, fixing protrusion; 216, water channel rib; 22, winding assembly; 221, first positioning member; 2221, lead wire; 223, stator core; 2231, sub-core; 223a, placement groove; 223b, avoidance groove; 223c, bridge wire groove; 224, coil disk; 225, insulation frame; 2251, guide block; 2252, lower insulation frame; 2253, upper insulation frame; 23, cover member; 231, first body portion; 232, cover plate; 24, blocking member; 25, first connector; 26. Buffer; 30. Conductive component; 30a. First mounting hole; 31. Conductive component; 31a. Welding port; 311. Conductive body; 312. Conductive pin; 32. Insulating component; 321. Stop rib; 322. Second main body; 323. Foot; 41. Sensing component; 42. Sensing reader; 50. Adapter; 51. First welding joint; 52. Second welding joint; 60. Waterway connector; 60a. Avoidance space; 61. Liquid inlet; 62. Liquid outlet; 63. Base. Specific embodiments

[0080] The following describes in detail embodiments of the present application. Examples of the embodiments 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 only used to explain the present application and are not to be construed as limiting the present application.

[0081] In the description of this application, 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" and the like to 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 this application 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 on this application.

[0082] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0083] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections, electrical connections, or communication; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.

[0084] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0085] In related technologies, linear motors have a rotor and a stator. When operating, these motors generate heat, which is typically dissipated through natural cooling. However, this heat dissipation is poor, resulting in poor operating efficiency. In some existing technologies, linear motors are equipped with cooling channels through which coolant flows to exchange heat with the motor. However, in these technologies, the cooling channels are independent of the linear motor, making it difficult to effectively exchange heat with the rotor or stator. These linear motors suffer from numerous parts, high costs, and poor cooling.

[0086] The stator assembly 20 according to an embodiment of the present application will be described below with reference to FIG. 1 to FIG. 33 .

[0087] According to the present application, the stator assembly 20 includes: a stator core shaft 21 and a winding assembly 22. The stator core shaft 21 includes a shaft wall 210. A cooling water channel extending along its axial direction is provided in the shaft wall 210. A water channel opening 210b is provided on the shaft wall 210. The water channel opening 210b is connected to the first end of the cooling water channel. The winding assembly 22 is sleeved on the outer periphery of the stator core shaft 21. The cooling water channel includes a first cooling water channel 2101a. The first cooling water channel 2101a exchanges heat with the winding assembly 22. The cross-sectional area of ​​at least part of the first cooling water channel 2101a is larger than the area of ​​the water channel opening 210b. Specifically, the winding assembly 22 generates heat during operation, and a cooling water channel is provided inside the shaft wall 210 of the stator core shaft 21 so that the stator core shaft 21 of the stator assembly 20 can be used as a cooling structure, so that the stator core shaft 21 has an integrated cooling function. By increasing the function of the stator assembly 20, the stator assembly 20 does not need to have a separate cooling structure for the winding assembly 22, which can reduce the number of parts of the stator assembly 20 and reduce the manufacturing cost of the stator assembly 20.

[0088] Furthermore, the stator core shaft 21 can be in close contact with the winding assembly 22 , so that the stator core shaft 21 can fully exchange heat with the winding assembly 22 , thereby improving the cooling effect on the winding assembly 22 , thereby improving the working reliability and working efficiency of the stator assembly 20 .

[0089] More specifically, the cooling water channel is disposed on the shaft wall 210 and includes a first cooling water channel 2101a adapted for heat exchange with the winding assembly 22. It is understood that, due to the spatial constraints of the shaft wall 210, the space for the first cooling water channel 2101a is limited. To ensure effective heat exchange between the first cooling water channel 2101a and the winding assembly 22, the first cooling water channel 2101a should cover a larger area of ​​the shaft wall 210, thereby increasing the contact area between the first cooling water channel 2101a and the winding assembly 22 and improving the heat dissipation of the winding assembly 22. Therefore, in the axial direction of the stator core shaft 21, the cross-sectional area of ​​the first cooling water channel 2101a should be greater than the area of ​​the water channel opening 210b. Furthermore, the larger cross-sectional area of ​​the first cooling water channel 2101a than the area of ​​the water channel opening 210b can also reduce the water inlet pressure at the water channel opening 210b, thereby ensuring the operational stability of the stator core shaft 21.

[0090] According to the stator assembly 20 of the present application, a cooling water channel is provided inside the shaft wall 210 of the stator core shaft 21 so that the stator core shaft 21 has an integrated cooling function, thereby reducing the number of parts of the stator assembly 20 and reducing the manufacturing cost of the stator assembly 20. In addition, the stator core shaft 21 exchanges heat with the winding assembly 22 through the first cooling water channel 2101a. The cross-sectional area of ​​the first cooling water channel 2101a is larger than the area of ​​the water channel opening 210b, which can increase the contact area between the first cooling water channel 2101a and the winding assembly 22, thereby improving the heat dissipation effect.

[0091] In some embodiments, the water channel opening 210 b may be disposed on the axial surface of the shaft wall 210 , or may be disposed on the circumferential surface of the shaft wall 210 .

[0092] According to some embodiments of the present application, the water channel opening 210b is formed by the cooling water channel penetrating the axial first end of the shaft wall 210. Here, the water channel opening 210b may refer to the inlet and outlet of the cooling water channel. The water channel opening 210b is located at one axial end of the shaft wall 210. In this case, the cooling water channel is reciprocatingly arranged in the axial direction of the stator core shaft 21. The cooling medium flowing into the cooling water channel from the cooling water channel inlet flows from the axial first end toward the axial second end of the stator core shaft 21, and then flows from the axial second end toward the axial first end of the stator core shaft 21. After sufficient heat exchange, the cooling medium flows out of the cooling water channel from the cooling water channel outlet located at the axial first end of the stator core shaft 21. In this case, the cooling water channel is longer, so as to extend the cooling medium flow path, thereby increasing the cooling medium flow time, and further increasing the cooling medium heat exchange time, thereby improving the heat exchange effect of the cooling water channel.

[0093] It can be understood that the stator assembly 20 according to the present application can be applied to the linear motor 1. The stator assembly 20 of the present application sets the water channel opening 210b at the first axial end of the stator core shaft 21, which also facilitates the design of other structural features of the stator core shaft 21 and the arrangement of other structures of the linear motor 1.

[0094] According to some embodiments of the present application, the cooling water channel further includes a second cooling water channel 2102a. In the axial direction of the stator core shaft 21, the second cooling water channel 2102a and the first cooling water channel 2101a are arranged sequentially, and the water channel opening 210b is directly connected to the second cooling water channel 2102a. Here, in the direction from the axial first end of the shaft wall 210 to the axial second end of the shaft wall 210, the second cooling water channel 2102a and the first cooling water channel 2101a are arranged sequentially, with the second cooling water channel 2102a located upstream of the cooling water channel and the first cooling water channel 2101a located downstream of the cooling water channel. The first cooling water channel 2101a is provided at a position corresponding to the first portion of the stator core shaft 21. The first portion of the stator core shaft 21 can be provided with a first portion of structural components. The first cooling water channel 2101a can exchange heat with the first portion of the structural components. In some embodiments, the first portion of the structural components includes the winding assembly 22. The second cooling water channel 2102a is provided at a position corresponding to the second portion of the stator core shaft 21. The second portion of the stator core shaft 21 can be provided with a second portion of structural components. The second cooling water channel 2102a can exchange heat with the second portion of the structural components. In some embodiments, the second portion of the structural components includes the conductive assembly 30. Multiple cooling water channels are provided within the shaft wall 210 of the stator core shaft 21 to exchange heat with multiple structures, meeting the heat exchange requirements of various structures, ensuring the heat exchange effect of the device provided with the stator assembly 20, and thus ensuring the normal operation of the device.

[0095] According to some embodiments of the present application, the cross-sectional area of ​​the first cooling water channel 2101a is greater than the cross-sectional area of ​​the second cooling water channel 2102a. It is understood that since the cooling water channel is provided within the shaft wall 210 of the stator core shaft 21, to ensure the structural strength of the shaft wall 210, the radial dimension of the cooling water channel in the shaft wall 210 should not be too large. Furthermore, to ensure the flow rate of the cooling medium within the cooling water channel and thus the heat exchange effect of the cooling water channel, the radial dimension of the cooling water channel in the shaft wall 210 should not be too small. Therefore, the cross-sectional area of ​​the first cooling water channel 2101a is designed to be greater than the cross-sectional area of ​​the second cooling water channel 2102a, thereby ensuring the heat exchange effect for the winding assembly 22 while also ensuring the structural strength of the stator core shaft 21.

[0096] In some embodiments, the cross-sectional area of ​​the second cooling water channel 2102a is also larger than the area of ​​the water channel opening 210b to ensure the heat exchange effect between the second cooling water channel 2102a and other structural components.

[0097] In some embodiments, in the axial direction of the stator core shaft 21, a line connecting the first cooling water channel 2101a and the axis of the stator core shaft 21 forms an angle with a line connecting the second cooling water channel 2102a and the axis of the stator core shaft 21. The first cooling water channel 2101a and the second cooling water channel 2102a are arranged axially of the stator core shaft 21 and staggered circumferentially of the stator core shaft 21. This allows the cooling water channels to cover a larger area of ​​the stator core shaft 21, thereby increasing the heat exchangeable area of ​​the cooling water channels on the shaft wall 210 of the stator core shaft 21 and improving the heat exchange efficiency of the cooling water channels.

[0098] According to some embodiments of the present application, in the radial direction of the stator core shaft 21, the second cooling water channel 2102a is positioned further outward than the first cooling water channel 2101a. A guide channel 2103a is provided between the first cooling water channel 2101a and the second cooling water channel 2102a. The wall thickness of the stator core shaft 21 at the guide channel 2103a is greater than the wall thickness of the stator core shaft 21 at the location where the first cooling water channel 2101a and the guide channel 2103a connect. Specifically, the guide channel 2103a is arranged obliquely toward the axis of the stator core shaft 21 in the direction from the second cooling water channel 2102a to the first cooling water channel 2101a, thereby connecting the second cooling water channel 2102a with the first cooling water channel 2101a. It can be understood that since the guide channel 2103a is set at an angle, in order to ensure the structural strength of the stator core shaft 21, the wall thickness of the stator core shaft 21 at the guide channel 2103a is designed to be greater than the wall thickness of the stator core shaft 21 at the position where the first cooling water channel 2101a is connected to the guide channel 2103a, so as to improve the structural strength of the stator core shaft 21, avoid local fracture of the stator core shaft 21 due to the design of the cooling water channel, and reduce the probability of damage to the shaft wall 210 by strengthening the local structural strength of the shaft wall 210.

[0099] In some embodiments, the portion of the stator core shaft 21 provided with the second cooling water channel 2102a is larger in radial dimension than the portion of the stator core shaft 21 provided with the first cooling water channel 2101a. The interior of the portion of the stator core shaft 21 provided with the second cooling water channel 2102a can be a hollow structure to accommodate other structures, and the second cooling water channel 2102a can exchange heat with these structures.

[0100] In some embodiments, the portion of the stator core shaft 21 provided with the first cooling water channel 2101a is smaller in radial dimension than the portion of the stator core shaft 21 provided with the second cooling water channel 2102a, so that the winding assembly 22 is sleeved on the portion of the stator core shaft 21 provided with the first cooling water channel 2101a.

[0101] According to some embodiments of the present application, multiple first cooling water channels 2101a are arranged circumferentially around the stator core shaft 21, with at least two first cooling water channels 2101a connected to the same second cooling water channel 2102a. The sum of the cross-sectional areas of at least two first cooling water channels 2101a is greater than the cross-sectional area of ​​the same second cooling water channel 2102a to which they are connected. Specifically, the multiple first cooling water channels 2101a arranged circumferentially around the stator core shaft 21 can increase the contact area between the cooling water channels and the winding assembly 22, thereby increasing the heat exchange area between the cooling water channels and the winding assembly 22, and thereby improving the heat exchange effect of the cooling water channels on the winding assembly 22. In some embodiments, the cooling medium can enter the multiple first cooling water channels 2101a along a single second cooling water channel 2102a, thereby reducing the number of cooling water channels within the shaft wall 210, thereby improving the cooling effect on the winding assembly 22 while maintaining the structural strength of the stator core shaft 21.

[0102] Furthermore, the sum of the cross-sectional areas of the plurality of first cooling water channels 2101 a connected to the same second cooling water channel 2102 a is greater than the cross-sectional area of ​​the second cooling water channel 2102 a , so as to further reduce the water inlet pressure of the water channel opening 210 b and ensure the working stability of the stator core shaft 21 .

[0103] According to some embodiments of the present application, a reinforcing rib is provided between two adjacent first cooling water channels 2101a. It is understood that since the first cooling water channels 2101a are provided within the shaft wall 210, multiple first cooling water channels 2101a would reduce the structural strength of the shaft wall 210. Therefore, a reinforcing rib is provided between two adjacent first cooling water channels 2101a to enhance the structural strength of the shaft wall 210.

[0104] In some embodiments, a reinforcing rib structure may also be provided on the inner wall of the first cooling water channel 2101a.

[0105] According to some embodiments of the present application, the first cooling water channel 2101a includes a first liquid inlet channel section 21011a and a first liquid outlet channel section 21012a, which are spaced apart in the circumferential direction of the stator core shaft 21. The outlet end of the first liquid inlet channel section 21011a and the inlet end of the first liquid outlet channel section 21012a are respectively located at the same end of the stator core shaft 21, and the first liquid inlet channel section 21011a and the first liquid outlet channel section 21012a are connected at an end distal from the water channel opening 210b. Specifically, the outlet end of the first liquid inlet channel section 21011a and the inlet end of the first liquid outlet channel section 21012a are located at the second axial end of the shaft wall 210 and are connected. In the direction of the cooling medium flowing from the first axial end of the shaft wall 210 toward the second axial end of the shaft wall 210, the water channel opening 210b is connected to the first liquid inlet water channel section 21011a of the first cooling water channel 2101a; in the direction of the cooling medium flowing from the second axial end of the shaft wall 210 toward the first axial end of the shaft wall 210, the first liquid outlet water channel section 21012a of the first cooling water channel 2101a is connected to the water channel opening 210b to form a loop-type cooling water channel, extending the flow path of the cooling medium, thereby increasing the flow time of the cooling medium in the cooling water channel, and then increasing the heat exchange time of the cooling medium and improving the heat exchange effect of the cooling medium.

[0106] According to some embodiments of the present application, the second cooling water channel 2102a includes a second liquid inlet channel section 21021a and a second liquid outlet channel section 21022a. The inlet end of the second liquid inlet channel section 21021a is connected to the inlet of the channel opening 210b, the outlet end of the second liquid inlet channel section 21021a is connected to the inlet end of the first liquid inlet channel section 21011a, the inlet end of the second liquid outlet channel section 21022a is connected to the outlet end of the first liquid outlet channel section 21012a, and the outlet end of the second liquid outlet channel section 21022a is connected to the outlet of the channel opening 210b. Specifically, the cooling water channels can be configured as multiple cooling water channels, each of which includes a second cooling water channel 2102a and one or more first cooling water channels 2101a connected to the second cooling water channel 2102a. In the direction of the cooling medium flowing from the first axial end of the shaft wall 210 toward the second axial end of the shaft wall 210, the water channel opening 210b is connected to the first liquid inlet water channel section 21011a through the second liquid inlet water channel section 21021a; in the direction of the cooling medium flowing from the second axial end of the shaft wall 210 toward the first axial end of the shaft wall 210, the first liquid outlet water channel section 21012a is connected to the water channel opening 210b through the second liquid outlet water channel section 21022a. At this time, the length of the cooling water channel is longer, so as to extend the flow path of the cooling medium, increase the flow time of the cooling medium, and thereby increase the heat exchange time of the cooling medium and improve the heat exchange effect of the cooling medium.

[0107] According to some embodiments of the present application, the central angle corresponding to the circumference of the first cooling water channel 2101a is a first central angle α, and the central angle corresponding to the circumference of the second cooling water channel 2102a is a second central angle β, where α>β. Here, the proportion of the first cooling water channel 2101a in the circumference of the stator core shaft 21 is greater than the proportion of the second cooling water channel 2102a in the circumference of the stator core shaft 21. This allows the cooling capacity of the cooling water channel on the stator core shaft 21 to be tilted more toward the section where the first cooling water channel 2101a is located. During assembly of the stator core shaft 21, components that generate more heat can be arranged in the section where the first cooling water channel 2101a is located, while components that generate less heat can be arranged in the section where the second cooling water channel 2102a is located. This allows the cooling water channels to distribute cooling capacity as needed, improving their heat dissipation and temperature reduction effects. The second cooling water channel 2102a occupies less space on the shaft wall 210, which helps reduce the impact on the structural strength of the stator core shaft 21.

[0108] With such an arrangement, the distribution of the cooling water channels on the stator core shaft 21 can take into account both the distribution of cooling capacity on demand and the guarantee of the structural strength of the stator core shaft 21 .

[0109] In some embodiments, the first cooling water channel 2101 a is constructed in plurality, and the first central angle α is the sum of the circumferential central angles of the first cooling water channels 2101 a .

[0110] In some embodiments, the second cooling water channel 2102a is configured in plurality, and the second central angle β is the sum of the corresponding central angles of the circumference of each second cooling water channel 2102a.

[0111] Multiple first cooling water channels 2101a and multiple second cooling water channels 2102a are all branches of the cooling water channels. During the flow of the cooling medium in the cooling water channels, the number of branches of the cooling water channels increases and the proportion of the branches of the cooling water channels in the circumferential direction of the stator core shaft 21 increases, which can further improve the heat dissipation capacity of the stator core shaft 21 and improve the heat dissipation efficiency.

[0112] In the embodiment shown in FIG33 , there are two first cooling channels 2101a. The circumferential central angle of one first cooling channel 2101a is α1, and the circumferential central angle of the other first cooling channel 2101a is α2. The first central angle α is the sum of the circumferential central angles α1 and α2 of the first cooling channel 2101a, i.e., α, α1, and α2 satisfy the following equation: α = α1 + α2. There is one second cooling channel 2102a. The second central angle β of the second cooling channel 2102a is greater than the first central angle α. This means that the proportion of the first cooling channel 2101a circumferentially around the stator shaft 21 is greater than the proportion of the second cooling channel 2102a circumferentially around the stator shaft 21. This increases the contact area between the cooling medium and the stator shaft 21, improving heat dissipation capacity and efficiency.

[0113] According to some embodiments of the present application, as shown in FIG33 , the central angle corresponding to the circumference of the first liquid outlet water channel section 21012a is a third central angle θ, and the central angle corresponding to the circumference of the second liquid outlet water channel section 21022a is a fourth central angle γ, where θ>γ. In other words, the proportion of the first liquid outlet water channel section 21012a in the circumferential direction of the stator core shaft 21 is greater than the proportion of the second liquid outlet water channel section 21022a in the circumferential direction of the stator core shaft 21. The proportion of the second liquid outlet water channel section 21022a in the circumferential direction of the stator core shaft 21 is relatively small, which helps to reduce the impact on the structural strength of the stator core shaft 21. The proportion of the first liquid outlet water channel section 21012a in the circumferential direction of the stator core shaft 21 is relatively large, which increases the proportion of the liquid outlet channel in the circumferential direction of the stator core shaft 21, expands the contact area between the cooling medium and the stator core shaft 21, and improves the heat dissipation capacity and heat dissipation efficiency of the stator core shaft 21.

[0114] In the embodiment shown in Figure 33, there are two first liquid outlet water channel sections 21012a, the circumferential corresponding central angle of one first liquid outlet water channel section 21012a is θ1, and the circumferential corresponding central angle of the other first liquid outlet water channel section 21012a is θ2, wherein the first central angle θ is the sum of the circumferential corresponding central angle θ1 of one first liquid outlet water channel section 21012a and the circumferential corresponding central angle θ2 of the other first liquid outlet water channel section 21012a, that is, θ, θ1, and θ2 satisfy the following equation: θ=θ1+θ2. There is one second liquid outlet water channel section 21022a, and the second center angle of the second liquid outlet water channel section 21022a is γ, wherein the second center angle γ is greater than the first center angle θ, that is, the proportion of the first liquid outlet water channel section 21012a in the circumferential direction of the stator core shaft 21 is greater than the proportion of the second liquid outlet water channel section 21022a in the circumferential direction of the stator core shaft 21, thereby increasing the contact area between the cooling medium and the stator core shaft 21 and improving the heat dissipation capacity and heat dissipation efficiency.

[0115] In some embodiments, the stator assembly 20 is applied to the linear motor 1 , the linear motor 1 is applied to the vehicle 10000 , and the water channel opening 210 b of the stator core shaft 21 is connected to the cooling circuit of the entire vehicle, thereby forming a closed cooling circuit.

[0116] In some embodiments of the present application, the stator assembly 20 includes a stator core shaft 21 and a winding assembly 22, wherein the stator core shaft 21 includes a shaft wall 210, and a plurality of cooling water channels extending radially along the shaft wall 210 are provided inside the shaft wall 210. The first axial end of the shaft wall 210 is formed with an inlet and an outlet of the cooling water channel. In the direction from the first axial end of the shaft wall 210 to the second axial end of the shaft wall 210, the liquid inlet channel portion of the cooling water channel includes a second cooling water channel 2102a, a second liquid inlet channel section 21021a, a guide channel 2103a, and a first cooling water channel 2101a, which are connected to the inlet of the cooling water channel and are sequentially connected; in the direction from the second axial end of the shaft wall 210 to the second axial end of the shaft wall 210, the liquid inlet channel portion of the cooling water channel includes a second cooling water channel 2102a, a second liquid inlet channel section 21021a, a guide channel 2103a, and a first liquid inlet channel section 21011a of the first cooling water channel 2101a, which are connected to the inlet of the cooling water channel and are sequentially connected; Axially, toward the first end of shaft wall 210, the cooling water channel's outlet portion includes a first outlet section 21012a of first cooling water channel 2101a, a guide channel 2103a, and a second outlet section 21022a of second cooling water channel 2102a, which are connected to and sequentially connected to the first inlet section 21011a of first cooling water channel 2101a. The second outlet section 21022a of second cooling water channel 2102a is connected to the cooling water channel outlet. The guide channel 2103a is tilted toward the axis of stator core shaft 21 in the direction from second cooling water channel 2102a to first cooling water channel 2101a, thereby connecting the second cooling water channel 2102a with the first cooling water channel 2101a. The winding assembly 22 is sleeved on the outer circumference of the portion of the stator core shaft 21 where the first cooling water channel 2101 a is provided, so that heat exchange can be performed between the first cooling water channel 2101 a and the winding assembly 22 .

[0117] The first cooling water channel 2101a and the second cooling water channel 2102a are arranged in the axial direction of the stator core shaft 21 and are staggered in the circumferential direction of the stator core shaft 21, so that the cooling water channel covers a larger area of ​​the stator core shaft 21, and the first cooling water channel 2101a occupies a larger circumferential area of ​​the stator core shaft 21 than the second cooling water channel 2102a, so that the first cooling water channel 2101a covers a larger circumferential area of ​​the stator core shaft 21, thereby improving the heat exchange effect at the stator core shaft 21 where the first cooling water channel 2101a is provided.

[0118] Furthermore, to reduce the water inlet pressure at water channel opening 210b and ensure the heat exchange efficiency of the cooling water channel, the second cooling water channel 2102a is designed to have a larger cross-sectional area than the cross-sectional area of ​​water channel opening 210b, and the first cooling water channel 2101a is designed to have a larger cross-sectional area than the cross-sectional area of ​​the second cooling water channel 2102a. The sum of the cross-sectional areas of multiple first cooling water channels 2101a connected to the same second cooling water channel 2102a is greater than the cross-sectional area of ​​the second cooling water channel 2102a. This can further reduce the water inlet pressure at water channel opening 210b and ensure the operational stability of the stator core shaft 21. Furthermore, reinforcing ribs are provided between adjacent first cooling water channels 2101a to enhance the structural strength of the shaft wall 210.

[0119] According to the stator assembly 20 designed in the present application, a loop-type cooling water channel is provided inside the shaft wall 210 of the stator core shaft 21. The stator core shaft 21 has an integrated cooling function, and the loop-type cooling water channel is longer, the cooling medium flow path is longer, and the cooling medium flow time is longer. The contact area between the cooling water channel and the winding assembly 22 is larger, and the heat exchange time is longer, so the heat exchange effect is better. The structure of the stator assembly 20 designed in the present application has better heat dissipation effect and more reliable operation.

[0120] The linear motor 1 according to the present application is briefly described below.

[0121] As shown in Figures 1 to 33, the linear motor 1 according to the present application includes: a mover assembly 10 and a stator assembly 20. The stator assembly 20 is a stator assembly 20 according to any of the above embodiments. The mover assembly 10 and the stator assembly 20 are relatively movable. Specifically, the mover assembly 10 can cooperate with the stator assembly 20, and the mover assembly 10 can move relative to the stator assembly 20. During this process, the movement of the mover assembly 10 generates heat energy, and the friction between the mover assembly 10 and other structures also generates heat. The cooling channel in the stator assembly 20 can also be used to exchange heat with the mover assembly 10, so that the linear motor 1 does not need to have a separate cooling structure, thereby reducing the parts required for the linear motor 1 and reducing the manufacturing cost of the linear motor 1.

[0122] The linear motor 1 according to the present application is provided with the above-mentioned stator assembly 20 , so the linear motor 1 has fewer parts, better heat dissipation effect, and more reliable operation.

[0123] In some embodiments, the mover assembly 10 is provided with an excitation assembly 11 . The excitation assembly 11 generally includes an excitation winding. The excitation winding is coupled to the winding assembly 22 to enable the mover assembly 10 to move relative to the stator assembly 20 .

[0124] According to some embodiments of the present application, as shown in FIG2 , the linear motor 1 further includes a conductive assembly 30, one end of which is connected to the winding assembly 22 and the other end of which is used to connect to the motor controller; the cooling water channel further includes a second cooling water channel 2102a, which is used for heat exchange with the conductive assembly 30. In some embodiments, the second cooling water channel 2102a and the first cooling water channel 2101a are arranged sequentially in a direction from the axial first end of the shaft wall 210 to the axial second end of the shaft wall 210, with the second cooling water channel 2102a located upstream of the cooling water channel and the first cooling water channel 2101a located downstream of the cooling water channel. The first cooling water channel 2101a is provided at a position corresponding to the first portion of the stator core shaft 21. The first portion of the stator core shaft 21 can be provided with a first portion of structural components. The first cooling water channel 2101a can exchange heat with the first portion of the structural components. In some embodiments, the first portion of the structural components includes the winding assembly 22. The second cooling water channel 2102a is provided at a position corresponding to the second portion of the stator core shaft 21. The second portion of the stator core shaft 21 can be provided with a second portion of structural components. The second cooling water channel 2102a can exchange heat with the second portion of the structural components. In some embodiments, the second portion of the structural components includes the conductive assembly 30. Multiple cooling water channels are provided within the shaft wall 210 of the stator core shaft 21 to exchange heat with multiple structures, meeting the heat exchange requirements of various structures, ensuring the heat exchange effect of the device provided with the stator assembly 20, and thus ensuring the normal operation of the device.

[0125] Furthermore, the conductive component 30 is adapted to be electrically connected to the winding component 22 to supply power to the winding component 22 , thereby enabling the winding component 22 to be coupled with the excitation component 11 , so that the linear motor 1 can operate normally.

[0126] According to some embodiments of the present application, the linear motor 1 further includes a detection device for detecting the displacement of the mover assembly 10. Specifically, the detection device can be disposed on the stator assembly 20 to detect movement of the mover assembly 10 relative to the stator assembly 20. The detection device can also be constructed in two parts, one located on the stator assembly 20 and the other located on the mover assembly 10. The two detection devices sense each other to detect movement of the mover assembly 10 relative to the stator assembly 20.

[0127] In addition, the detection device can detect the displacement of the movable component 10 by detecting the moving distance of the movable component 10, such as a displacement sensor; the detection device can also detect the displacement of the movable component 10 by detecting the image of the movable component 10 at a certain moment, for example, a camera is set on the stator component 20, and a grid is set on the movable component 10, and the camera captures the corresponding grid of the grid to calculate the current position of the movable component 10, thereby calculating the current displacement of the movable component 10; the detection device can also be other devices for detecting the displacement of the movable component 10, which can be selected according to actual needs and is not limited here.

[0128] According to some embodiments of the present application, the detection device includes a sensing member 41 and an inductive reading head 42. The sensing member 41 is disposed on the stator core shaft 21, and the inductive reading head 42 is disposed on the mover assembly 10. The inductive reading head 42 is coupled to the sensing member 41 to detect the position of the mover assembly 10. Specifically, when the mover assembly 10 moves relative to the stator assembly 20, the sensing member 41 and the inductive reading head 42 also move relative to each other. At this time, the sensing member 41 and the inductive reading head 42 are coupled to detect the position of the mover assembly 10.

[0129] In some embodiments, the sensing element 41 is constructed as a sensor magnetic strip, and the sensing reading head 42 is a sensor reading head. The sensor magnetic strip can cooperate with the sensor reading head to detect the operating position of the mover assembly 10 .

[0130] In some embodiments, the sensor magnetic stripe includes multiple magnetic field sensors distributed axially along the stator core shaft 21. The sensor reader can be a magnetic navigation sensor. The magnetic field sensor at each detection point on the magnetic stripe converts the magnetic field strength at that location into an electrical signal and transmits it to the magnetic navigation sensor's control chip. The control chip then measures the magnetic field strength at each detection point through data conversion. The mover assembly 10 is adapted to move axially relative to the stator assembly 20. During this movement of the mover assembly 10, the sensor reader can determine the position of each detection point relative to the position sensor, thereby detecting the operating position of the mover assembly 10.

[0131] In other embodiments, the sensing element 41 may be a grating, and the sensing reader 42 may be a scale grating. When the grating and the scale grating move relative to each other, the relative displacement between the two changes the propagation path of the light, thereby forming alternating light and dark interference fringes on the photoelectric receiver. By calculating the number of interference fringes, the displacement of the movable component 10 can be obtained.

[0132] In the prior art, the detection device is protruding from the outer peripheral wall of the stator core shaft 21. When other structures cooperate with the stator core shaft 21, the detection device is likely to interfere with other structures, causing wear of other structures and even causing the linear motor 1 to get stuck. At the same time, since the detection device is protruding from the outer peripheral wall of the stator core shaft 21, the outer peripheral surface of the stator core shaft 21 cannot form a good sealing structure, and external water vapor can easily enter the interior of the linear motor 1, which can easily cause the linear motor 1 to fail.

[0133] According to some embodiments of the present application, the induction member 41 is disposed on the outer peripheral wall of the stator core shaft 21, and the stator assembly 20 further includes a cover member 23, which is disposed on the stator core shaft 21 to cover the induction member 41. Specifically, the cover member 23 can protect the induction member 41, and the cover member 23 covering the induction member 41 can also prevent the induction member 41 from interfering with other structures due to its location on the outer peripheral wall of the stator core shaft 21. The cover member 23 can also seal the induction member 41.

[0134] According to some embodiments of the present application, an outer peripheral wall of the stator core shaft 21 is provided with a receiving groove 21 a , and the induction member 41 is placed in the receiving groove 21 a to position the induction member 41 and prevent the induction member 41 from being separated from the stator assembly 20 .

[0135] In some embodiments, an adhesive layer is provided between the induction element 41 and the outer peripheral wall of the stator core shaft 21 to enhance the connection stability between the induction element 41 and the stator core shaft 21 .

[0136] In other embodiments, the outer circumferential wall of the stator core shaft 21 and the inner circumferential wall of the cover 23 are respectively provided with groove bodies that are recessed in directions away from each other, both groove bodies extend in the axial direction, and the two groove bodies are together constructed as an accommodating groove 21a; or, the outer circumferential wall of the stator core shaft 21 and the inner circumferential wall of the cover 23 are spaced to form a gap, and the gap is the accommodating groove 21a.

[0137] In other embodiments, the inner peripheral wall of the cover 23 is provided with an accommodating groove 21 a extending in the axial direction, so as to be suitable for accommodating the sensing element 41 .

[0138] According to some embodiments of the present application, a portion of the circumferential wall of the stator core shaft 21 is recessed inward to define a receiving groove 21a. In some embodiments, the receiving groove 21a is formed by recessing a portion of the outer circumferential wall of the stator core shaft 21 radially inward, so that the radial size of the stator core shaft 21 can be reduced while setting the induction member 41.

[0139] According to some embodiments of the present application, one axial end of the accommodating groove 21a is open to define a mounting opening 21b for the sensing member 41, and the stator assembly 20 further includes a blocking member 24 for blocking the mounting opening 21b. Here, the cover member 23 can cover the surface of the stator core shaft 21 where the accommodating groove 21a is formed. The cover member 23 is spaced apart from the accommodating groove 21a so as to cover the sensing member 41 after the sensing member 41 is placed in the accommodating groove 21a. At this time, the cover member 23 and the accommodating groove 21a define a partial spacing of the mounting opening 21b so that the sensing member 41 can be placed in the accommodating groove 21a from the mounting opening 21b. After the sensing member 41 is placed in the accommodating groove 21a, the blocking member 24 blocks the mounting opening 21b to prevent the sensing member 41 from being exposed from the mounting opening 21b, and can seal the accommodating groove 21a to prevent foreign matter from entering the accommodating groove 21a, thereby preventing the normal operation of the sensing member 41 from being affected.

[0140] When installing the sensing member 41 , the sensing member 41 can be slidably installed in the receiving groove 21 a through the installation opening 21 b , making the installation of the sensing member 41 more convenient.

[0141] In some embodiments, when the blocking member 24 is installed in the mounting opening 21b, it is at least partially accommodated in the accommodating groove 21a and / or the mounting opening 21b and abuts against the sensing member 41 in the axial direction to block the remaining space in the accommodating groove 21a, so that the sensing member 41 can be stably installed in the accommodating groove 21a to prevent the sensing member 41 from loosening, thereby allowing the sensing member 41 and the sensing reading head 42 to accurately reflect the displacement of the movable component 10 relative to the stator component 20.

[0142] According to some embodiments of the present application, the accommodating groove 21a and the cooling water channel are staggered in the circumferential direction of the stator core shaft 21. It can be understood that the cooling water channel is opened inside the shaft wall 210 of the stator core shaft 21, and the accommodating groove 21a is opened on the outer peripheral surface of the shaft wall 210 of the stator core shaft 21. In order to ensure the structural strength of the shaft wall 210, the accommodating groove 21a and the cooling water channel should be staggered and arranged at intervals in the circumferential direction of the stator core shaft 21.

[0143] According to some embodiments of the present application, the cover 23 is arranged outside the outer peripheral wall of the stator core shaft 21. In some embodiments, the cover 23 is constructed as a sleeve structure, which is arranged outside the stator core shaft 21 and covers the induction component 41. The design of the sleeve-shaped cover 23 can form a complete circular surface on the outer surface of the stator core shaft 21, which is convenient for the arrangement of other structures.

[0144] According to some embodiments of the present application, the cover 23 includes a first body portion 231 and a cover plate 232 . The cover plate 232 is fixed to the first body portion 231 and is disposed radially opposite to the sensing element 41 .

[0145] In some embodiments, the first main body portion 231 and the cover plate 232 are separate parts, the first main body portion 231 is fixed to the stator core shaft 21 and is a magnetic material part, and the cover plate 232 is a non-magnetic material part. Specifically, the cover 23 can be a split structure, and the first main body portion 231 connected to the stator core shaft 21 is a magnetic material part, so that the cover 23 has a higher structural strength, reducing the possibility of wear or deformation of the cover 23 under stress, thereby ensuring the stability and reliability of the linear motor 1; the cover plate 232 is located between the sensing part 41 and the sensing read head 42 and is a non-magnetic material part, which can avoid the cover plate 232 from affecting the coordination between the sensing part 41 and the sensing read head 42, thereby ensuring the detection accuracy of the displacement of the movable component 10 by the sensing part 41 and the sensing read head 42.

[0146] In some embodiments, the first body portion 231 is a sleeve structure. After the first body portion 231 is matched with the stator core shaft 21, a window can be opened in the portion of the first body portion 231 facing the sensing element 41, and the cover plate 232 is arranged in the window and faces the sensing element 41.

[0147] In some embodiments, the first body portion 231 and the cover plate 232 may be connected together in a detachable manner, and the detachable connection manner includes but is not limited to a threaded connection or a snap connection.

[0148] In other embodiments, the first body portion 231 and the cover plate 232 may be connected together in a non-detachable connection manner, and the non-detachable connection manner includes but is not limited to welding or bonding.

[0149] For example, the first body portion 231 and the cover plate 232 may be welded together, thereby increasing the bonding strength between the first body portion 231 and the cover plate 232 and preventing separation between the first body portion 231 and the cover plate 232 during operation of the linear motor 1, thereby improving the stability and reliability of the linear motor 1. Welding methods include, but are not limited to, ultrasonic welding, molecular diffusion welding, and laser welding.

[0150] In some embodiments, the magnetic permeability of the first main body 231 is greater than the magnetic permeability of the cover 232, thereby reducing or even avoiding the impact of the cover 232 on the magnetic field generated by the sensing element 41, ensuring the stability of the cooperation between the sensing element 41 and the sensing reader 42, and improving the detection accuracy of the detection device.

[0151] According to some embodiments of the present application, the winding assembly 22 is provided with a first positioning member 221, and the stator core shaft 21 is provided with a second positioning member 212. The first positioning member 221 and the second positioning member 212 cooperate to limit the circumferential freedom of the winding assembly 22. The second positioning member 212 and the cooling water channel are staggered in the circumferential direction of the stator core shaft 21. It can be understood that the first positioning member 221 and the second positioning member 212 can limit the rotation of the winding assembly 22 relative to the stator core shaft 21 after cooperation, thereby ensuring the connection stability between the winding assembly 22 and the stator core shaft 21. In addition, the second positioning member 212 is staggered with the cooling water channel in the circumferential direction to prevent the first positioning member 221 from applying a circumferential force to the second positioning member 212 when the stator core shaft 21 and the winding assembly 22 have a tendency to rotate relative to each other, thereby preventing the structural strength of the stator core shaft 21 from attenuating.

[0152] The second positioning member 212 is staggered with the cooling water channel in the circumferential direction, which can also ensure the space requirements for setting the second positioning member 212 and setting the cooling water channel, avoid the second positioning member 212 occupying the wall thickness of the cooling water channel, making the cooling water channel wall too thin, and avoid the structural strength of the stator core shaft 21 from deteriorating. It can be understood that the wall thickness of the cooling water channel is relatively thin and the casting pressure is high. The staggered arrangement of the second positioning member 212 and the cooling water channel can also avoid the wall of the cooling water channel from breaking during casting.

[0153] In some embodiments, the second positioning member 212 is a positioning groove.

[0154] In some embodiments, the winding assembly 22 is sleeved on the stator core shaft 21, the first positioning member 221 is constructed as a positioning protrusion arranged on the inner side of the winding assembly 22, and the positioning protrusion extends axially, and the second positioning member 212 is constructed as a positioning groove arranged on the outer peripheral surface of the stator core shaft 21, and the positioning groove extends axially.

[0155] In some embodiments, on the circumference of the stator core shaft 21, the cooling water channels are constructed as a plurality of spaced-apart channels, the shaft wall 210 between two adjacent cooling water channels is constructed as a water channel rib 216, and the positioning grooves are correspondingly arranged on the outer circumferential surface of the water channel rib 216 to be staggered with the cooling water channels in the circumferential direction.

[0156] According to some embodiments of the present application, the shaft wall 210 of the stator core shaft 21 encloses a wiring space 21c, and the conductive component 30 is disposed within the wiring space 21c. The first end of the conductive component 30 is connected to the lead wire 2221 of the winding assembly 22, and the second end of the conductive component 30 is adapted to be electrically connected to the motor controller. In some embodiments, the wiring space 21c extends axially along the stator core shaft 21, and the conductive component 30 is also arranged axially along the stator core shaft 21. The first axial end of the conductive component 30 is connected to the winding assembly 22, and the second axial end of the conductive component 30 is connected to the motor controller. Here, the conductive component 30 is adapted to electrically connect the motor controller to the winding assembly 22 to control the current flow in the winding assembly 22, thereby controlling the relative movement of the stator assembly 20 and the mover assembly 10.

[0157] In some embodiments, the winding assembly 22 may include a three-phase coil.

[0158] The stator core shaft 21 shaft wall 210 itself is formed with a cooling water channel, and the stator core shaft 21 shaft wall 210 encloses a wiring space 21c, and the conductive component 30 is arranged in the wiring space 21c. The cooling water channel and the conductive component 30 are both arranged on the stator core shaft 21 shaft wall 210, which is conducive to improving the space utilization of the stator core shaft 21, making the stator component 20 structure more compact, and facilitating the miniaturization design of the linear motor 1. Moreover, since the cooling water channel is arranged inside the stator core shaft 21 shaft wall 210, the stator core shaft 21 shaft wall 210 has good sealing performance for the cooling water channel, which can improve the isolation effect between the conductive component 30 and the cooling water channel, thereby improving the safety of the linear motor 1. In addition, the cooling water channel can simultaneously exchange heat with the conductive component 30 and the winding component 22 to improve the heat dissipation efficiency and heat dissipation effect of the linear motor 1.

[0159] According to some embodiments of the present application, the shaft wall 210 of the stator core shaft 21 is provided with a connection notch 21d; the linear motor 1 further includes an adapter 50, which is disposed through the connection notch 21d and is respectively connected to the lead wire 2221 and the conductive component 30. Specifically, the lead wire 2221 generally extends in the axial direction of the stator core shaft 21, and the conductive component 30 also extends in the axial direction of the stator core shaft 21 along the wiring space 21c. Therefore, in theory, the lead wire 2221 and the conductive component 30 are arranged approximately in parallel. The adapter 50 is provided to electrically connect the end of the lead wire 2221 to the end of the conductive component 30 exposed in the connection notch 21d, thereby facilitating the connection between the lead wire 2221 and the conductive component 30, making the process easy to process and having high process feasibility.

[0160] In some embodiments, the adapter 50 may extend in the radial direction of the stator core shaft 21 , and two ends of the adapter 50 are respectively connected to the lead wire 2221 and the conductive component 30 .

[0161] In some embodiments, the adapter 50 is a conductive structure.

[0162] In some embodiments, the adapter 50 is covered with an insulating structure to prevent electrical leakage and prevent the adapter 50 from shorting due to external impurities. The portion of the adapter 50 connected to the lead wire 2221 and the portion of the adapter 50 connected to the conductive component 30 are exposed from the insulating structure to electrically connect the lead wire 2221 to the conductive component 30.

[0163] In some embodiments, the lead wire 2221 is covered with an insulating structure to prevent leakage and short circuit. The portion of the lead wire 2221 connected to the adapter 50 is exposed from the insulating structure to facilitate electrical connection with the adapter 50.

[0164] In some embodiments, the lead wire 2221 is located radially outside the stator core shaft 21 , and the lead wire 2221 passes through the connection gap 21 d to be electrically connected to the conductive component 30 .

[0165] Here, the winding assembly 22 is sleeved on the outer circumferential surface of the stator core shaft 21, and the lead wire 2221 on the winding assembly 22 is also located on the radially outer side of the stator core shaft 21. In order to facilitate the electrical connection between the lead wire 2221 and the conductive component 30 in the wiring space 21c inside the stator core shaft 21, a connecting notch 21d is provided on the shaft wall 210 of the stator core shaft 21 to connect the space outside the shaft wall 210 of the stator core shaft 21 with the wiring space 21c. At this time, the lead wire 2221 can pass through the connecting notch 21d and extend into the wiring space 21c, thereby being electrically connected to the conductive component 30.

[0166] In some embodiments, a portion of the conductive component 30 may extend from the connection notch 21 d to the outer space of the shaft wall 210 of the stator core shaft 21 to be electrically connected to the lead wire 2221 .

[0167] In some embodiments, the connection notch 21d is located at the bottom of the wiring space 21c. Here, the wiring space 21c extends axially along the stator core shaft 21, and the conductive component 30 is also arranged axially along the stator core shaft 21. The connection notch 21d is set at the bottom of the wiring space 21c, so that the conductive component 30 and / or the lead wire 2221 do not need to be bent to adapt to the position of the connection notch 21d, simplifying the process design of the conductive component 30 and the lead wire 2221 and ensuring the structural strength of the conductive component 30 and the lead wire 2221.

[0168] In some embodiments, the winding assembly 22 is sleeved on the outer periphery of the stator core shaft 21. At this time, the wiring space 21c can extend from one axial end of the stator core shaft 21 to the other end, and the connecting notch 21d is set at the other axial end of the above-mentioned stator core shaft 21. The lead wire 2221 of the winding assembly 22 extends to the other axial end of the above-mentioned stator core shaft 21 to extend into the wiring space 21c through the connecting notch 21d.

[0169] In other embodiments, the winding assembly 22 is sleeved on the outer periphery of the stator core shaft 21 and is arranged adjacent to the other axial end of the stator core shaft 21. The winding assembly 22 is spaced from one axial end of the stator core shaft 21. At this time, the wiring space 21c can extend from one axial end of the stator core shaft 21 toward the other end and extend to the position where the winding assembly 22 is sleeved on the stator core shaft 21. The connecting notch 21d is arranged adjacent to the winding assembly 22, and the lead wire 2221 of the winding assembly 22 extends toward the above-mentioned axial end of the stator core shaft 21 to extend into the wiring space 21c through the connecting notch 21d.

[0170] According to some embodiments of the present application, the adapter 50 is welded to the lead wire 2221 and the conductive component 30 respectively to ensure the connection strength between the adapter 50 and the lead wire 2221 and the conductive component 30, and to avoid the adapter 50 being separated from the lead wire 2221 or the conductive component 30 during the use of the linear motor 1, thereby ensuring the working stability and reliability of the linear motor 1.

[0171] In some embodiments, to ensure the realization of the welding process between the adapter 50 and the lead wire 2221, the welding point between the adapter 50 and the lead wire 2221 should not be too close to the stator core shaft 21 to prevent the welding gun from failing to work. The minimum distance between the welding point between the adapter 50 and the lead wire 2221 and the outer surface of the stator core shaft 21 needs to be determined with reference to the welding gun specifications, and this distance is not limited here; the part where the lead wire 2221 is connected to the adapter 50 is conductive. To ensure the overall insulation effect, the distance between the welding point between the lead wire 2221 and the adapter 50 and the outer periphery of the winding assembly 22 should be no less than 2 mm.

[0172] According to some embodiments of the present application, the adapter 50 is provided with a first welding head 51 and a second welding head 52. The first welding head 51 and the second welding head 52 extend axially along the stator core shaft 21, respectively. The first welding head 51 is welded to the conductive component 30, and the second welding head 52 is welded to the lead wire 2221. Specifically, the first welding head 51 and the second welding head 52 are respectively provided at both ends of the adapter 50 in the extension direction. For example, the surface of the second welding head 52 facing the lead wire 2221 serves as the welding surface between the second welding head 52 and the lead wire 2221. The second welding head 52 is designed to be located at one end of the adapter 50 and extend axially along the stator core shaft 21 to increase the welding surface area, improve the stability of the welding connection, and facilitate the welding operation. The extension of the first welding head 51 axially along the stator core shaft 21 also improves the stability of the welding connection between the first welding head 51 and the conductive component 30, and facilitates the welding operation between the first welding head 51 and the conductive component 30.

[0173] In some embodiments, the first welding head 51 and the second welding head 52 are formed by axially bending two ends of the adapter 50 toward the stator core shaft 21 .

[0174] In some embodiments, the portion of the conductive component 30 exposed from the connection notch 21d is provided with a welding opening 31a. The first welding head 51 is adapted to be received in the welding opening 31a. The first welding head 51 can be welded to the welding opening 31a to connect the adapter 50 to the conductive component 30. To facilitate welding, the area of ​​the portion of the conductive component 30 exposed from the connection notch 21d should be larger than the area of ​​the welding opening 31a.

[0175] In some embodiments, the welding port 31 a and the first welding head 51 should at least be a transition fit or an interference fit to facilitate welding operation.

[0176] In some embodiments, to ensure welding quality, the front end surface of the first welding head 51 and the front end surface of the welding hole are on the same plane.

[0177] According to some embodiments of the present application, the stator assembly 20 further includes a first connector 25. The first end of the first connector 25 is electrically connected to an end of the conductive component 30 that is distal from the winding assembly 22, and the second end of the first connector 25 is adapted to be electrically connected to a motor controller. Here, the first end of the conductive component 30 is positioned within the wiring space 21c and exposed through the connection notch 21d for electrical connection to the lead wire 2221. The second end of the conductive component 30 is electrically connected to the first connector 25, which electrically connects the conductive component 30 to the motor controller.

[0178] In some embodiments, a limiting protrusion 213 is provided on the outer peripheral wall of the stator core shaft 21. The limiting protrusion 213 is located between the winding assembly 22 and the first connector 25 and is adapted to cooperate with the winding assembly 22 to limit axial displacement of the winding assembly 22. To prevent the winding assembly 22 from moving axially on the stator core shaft 21, the limiting protrusion 213 is provided. The limiting protrusion 213 is located between the winding assembly 22 and the first connector 25 to cooperate with the axial end of the winding assembly 22, thereby preventing the winding assembly 22 from moving axially on the stator core shaft 21.

[0179] The limiting protrusion 213 and the winding assembly 22 may be in a stop fit, a snap fit, or other fit modes.

[0180] At the same time, in some embodiments, in order to fix the winding assembly 22 to the outer surface of the stator core shaft 21, the cross-section of the portion where the stator core shaft 21 cooperates with the winding assembly 22 can be a non-circular shape such as a rectangle or a pentagon to limit the circumferential rotation of the winding assembly 22 relative to the stator core shaft 21; it can also be as in the embodiment described above, where the winding assembly 22 is provided with a first positioning member 221, and the stator core shaft 21 is provided with a second positioning member 212, and the first positioning member 221 cooperates with the second positioning member 212 to limit the circumferential rotation of the winding assembly 22 relative to the stator core shaft 21.

[0181] In some embodiments, the connection notch 21d and the limiting protrusion 213 are located at the same height in the axial direction of the stator core shaft 21. Specifically, the provision of the connection notch 21d on the shaft wall 210 of the stator core shaft 21 may reduce the strength of the stator core shaft 21. By designing the connection notch 21d and the limiting protrusion 213 to be located at the same height on the stator core shaft 21, that is, the connection notch 21d and the limiting protrusion 213 are located on the same circumference, the problem of reduced strength of the stator core shaft 21 due to the provision of the connection notch 21d can be alleviated.

[0182] In some embodiments, since there are generally three lead wires 2221 of the three-phase coil, the number of connecting notches 21d is also three, and the three connecting notches 21d are evenly distributed on the circumference of the stator core shaft 21, with each connecting notch 21d spaced 120° apart.

[0183] In some embodiments, a fixing protrusion 214 is provided within the wiring space 21c, and the conductive assembly 30 is fixed to the fixing protrusion 214. Specifically, the stator core shaft 21 has a fixing protrusion 214, which is located within the wiring space 21c enclosed by the shaft wall 210 of the stator core shaft 21. Here, the conductive assembly 30 can have a first mounting hole 30a, and the fixing protrusion 214 can have a second mounting hole 21f. Bolts can be inserted through the first mounting hole 30a and the second mounting hole 21f to securely connect the conductive assembly 30 to the stator core shaft 21. The fixing protrusion 214 is disposed within the wiring space 21c, eliminating the need to occupy space outside the stator core shaft 21, thereby improving space utilization.

[0184] In some embodiments, after the conductive component 30 is mated with the stator core shaft 21, at least part of the conductive component 30 is located on the outside of the fixing protrusion 214 in the axial direction of the stator core shaft 21. At this time, the above-mentioned at least part of the conductive component 30 is arranged closer to the end of the stator core shaft 21 than the fixing protrusion 214, and the bolt is passed through the first mounting hole 30a and the second mounting hole 21f in sequence from the end of the stator core shaft 21 to fix the conductive component 30 to the stator core shaft 21.

[0185] In some embodiments, the fixing protrusion 214 and the stator core shaft 21 are integrally formed. Specifically, the fixing protrusion 214 is connected to the inner wall of the wiring space 21c. Here, one end of the fixing protrusion 214 can be connected to the inner wall of the wiring space 21c, and the other end of the fixing protrusion 214 can extend toward the inside of the wiring space 21c.

[0186] Furthermore, the number of the fixing protrusions 214 can be set to be multiple, for example, the number of the fixing protrusions 214 can be set to two. By setting the number of the fixing protrusions 214 to be multiple, the installation firmness of the conductive component 30 can be improved.

[0187] The integral formation of the fixing protrusion 214 and the stator core shaft 21 provides a high structural strength, reducing the likelihood of separation between the fixing protrusion 214 and the stator core shaft 21. Furthermore, by integrally forming the fixing protrusion 214 and the stator core shaft 21, the integration of the stator core shaft 21 is improved, thereby reducing the number of components in the linear motor 1 and simplifying the assembly steps of the components of the linear motor 1, thereby improving the production and assembly efficiency of the linear motor 1.

[0188] According to some embodiments of the present application, the conductive assembly 30 includes a conductive member 31 and an insulating member 32 that wraps around the conductive member 31. The insulating member 32 is fixed to the fixing protrusion 214 in the stator core shaft 21. The conductive member 31 is connected to the lead wire 2221 and the motor controller, respectively. Specifically, the conductive member 31 extends in the axial direction of the stator core shaft 21, and the first end of the conductive member 31 in the extension direction is electrically connected to the lead wire 2221, and the second end of the conductive member 31 in the extension direction is electrically connected to the motor controller. Here, in some embodiments, the second end of the conductive member 31 is electrically connected to the first connector 25, and the first connector 25 is electrically connected to the motor controller.

[0189] To prevent condensed water or other impurities from coming into contact with the conductive member 31, which could cause it to short-circuit or fail, an insulating member 32 is provided around the conductive member 31 to protect it. After the conductive assembly 30 is mated with the stator core shaft 21, the portion of the insulating member 32 adjacent to the end of the stator core shaft 21 is located axially outward of the fixing protrusion 214 on the stator core shaft 21. A first mounting hole 30a is provided axially through this portion of the insulating member 32. Bolts are inserted from the end of the stator core shaft 21, sequentially through the first mounting hole 30a and the second mounting hole 21f, to securely connect the conductive assembly 30 to the stator core shaft 21.

[0190] In some embodiments, the portion of the insulating member 32 adjacent to the end of the stator core shaft 21 is also provided with a hole for cooperating with the first connector 25. After the conductive component 30 is fixedly connected to the stator core shaft 21, the connector wire end can be connected to the insulating member 32 through the hole, thereby connecting the connector wire end to the stator core shaft 21.

[0191] In some embodiments, the conductive member 31 is exposed at the end of the insulating member 32 through these holes, so that the connector wire end can be electrically connected to the conductive member 31 after being connected to the insulating member 32 .

[0192] According to some embodiments of the present application, the insulating member 32 is provided with a first anti-rotation portion, and the stator core shaft 21 is provided with a second anti-rotation portion. The first anti-rotation portion and the second anti-rotation portion cooperate to limit the circumferential rotational freedom of the conductive component 30. In some embodiments, the first anti-rotation portion is a protrusion, and the second anti-rotation portion is a groove provided on the inner wall of the wiring space 21c.

[0193] In some embodiments, the first anti-rotation portion is constructed as a protrusion structure protruding from the outer circumference of the insulating member 32 and suitable for abutting against the inner surface of the wiring space 21c formed by the stator core shaft 21. In this case, the second anti-rotation portion can be a groove for accommodating the protrusion.

[0194] In some embodiments, the axial cross-section of the insulating part 32 can be a polygon, and the axial cross-section of the wiring space 21c is also constructed as a corresponding polygon, so that the insulating part 32 will no longer rotate after being matched with the inner wall of the wiring space 21c, thereby limiting the circumferential rotational freedom of the conductive component 30.

[0195] It is understood that to facilitate assembly of the insulating member 32 into the wiring space 21c, the insulating member 32 should have a clearance fit with the inner surface of the stator core shaft 21 forming the wiring space 21c. Therefore, to prevent the insulating member 32 from swaying within the wiring space 21c, stop ribs 321 are provided on the circumferential surface of the insulating member 32. The stop ribs 321 abut against the inner surface of the stator core shaft 21 forming the wiring space 21c, thereby increasing the support points of the insulating member 32, preventing the insulating member 32 from swaying within the wiring space 21c and improving the stability of the connection between the insulating member 32 and the stator core shaft 21. Furthermore, the stop ribs 321 also enhance the structural strength of the insulating member 32. Furthermore, the number of stop ribs 321 should be limited to ensure overall lightweight design.

[0196] According to some embodiments of the present application, the routing space 21c includes a center hole 21g and a plurality of accommodating grooves 21h, and the plurality of accommodating grooves 21h are distributed circumferentially and are respectively connected to the center hole 21g; the insulating member 32 includes a second main body portion 322 and a foot portion 323, the second main body portion 322 is arranged in the center hole 21g, and the foot portion 323 extends into the accommodating groove 21h, the conductive member 31 includes a conductive body 311 and a conductive pin 312, the conductive body 311 is wrapped in the second main body portion 322, the conductive pin 312 is connected to the conductive body 311, the conductive pin 312 is wrapped in the foot portion 323 and partially exposed from the foot portion 323 to be electrically connected to the lead wire 2221.

[0197] The conductive body 311 of the conductive member 31 can be exposed from the second body portion 322 of the insulating member 32, allowing the conductive member 31 to be electrically connected to an external power source. Furthermore, the conductive body 311 is connected to the external power source only through the electrical connection points on the conductive body 311, while the rest of the conductive body 311, excluding the electrical connection points, is still covered by the second body portion 322 of the insulating member 32. The conductive pins 312 of the conductive member 31 are exposed from the pin portion 1423 of the insulating member 32, allowing the conductive member 31 to be electrically connected to the lead wires 2221. Furthermore, the conductive pins 312 are connected to the lead wires 2221 only through the electrical connection points on the conductive pins 312, while the rest of the conductive pins 312, excluding the electrical connection points, are still covered by the pin portion 1423 of the insulating member 32. With the necessary electrical connection points exposed from the insulating member 32, the remaining portions of the conductive member 31 are covered by the insulating member 32, significantly enhancing the insulation protection of the conductive member 31.

[0198] In some embodiments, the conductive component 30 is arranged axially along the stator core shaft 21, and the conductive member 31 and the insulating member 32 both extend axially along the stator core shaft 21. One axial end of the insulating member 32 is the second body portion 322 and the other axial end is the pin portion 1423. One axial end of the conductive member 31 is the conductive body 311 and the other axial end is the conductive pin 312. One axial end of the conductive member 31 extends to the lead wire 2221 to be electrically connected to the lead wire 2221, and the other axial end of the conductive member 31 is electrically connected to an external power supply.

[0199] In some embodiments, the conductive body 311 of the conductive member 31 is embedded in the second main body portion 322 of the insulating member 32. The extension direction of the conductive body 311 is not limited. When there are multiple conductive members 31, the conductive bodies 311 of each conductive member 31 do not contact or interfere with each other.

[0200] In some embodiments, the foot portion 323 of the insulating member 32 is configured as the first anti-rotation portion, and the accommodating groove 21h in the wiring space 21c is configured as the second anti-rotation portion.

[0201] In some embodiments, the insulating member 32 is disposed in the center hole 21g, and a portion of the conductive member 31 is disposed in each receiving groove 21h. The conductive member 31 disposed in the receiving groove 21h is electrically connected to the lead wire 2221 and the first connector 25 respectively.

[0202] Specifically, the wiring space 21c is constructed as a special-shaped structure to fully utilize the space at the stator core shaft 21. At least part of each conductive member 31 can extend into the corresponding accommodating groove 21h, so that the conductive component 30 can be limitedly matched with the stator core shaft 21 along the circumferential direction to avoid relative rotation between the conductive component 30 and the stator core shaft 21.

[0203] The accommodating groove 21h is located on the outer side of the center hole 21g in the radial direction of the stator core shaft 21. On the circumference of the stator core shaft 21, multiple accommodating grooves 21h are arranged at intervals around the center hole 21g, and multiple accommodating grooves 21h are connected with the center hole 21g in the radial direction of the stator core shaft 21, which is conducive to reducing the radial size of the stator core shaft 21 and realizing the lightweight design of the linear motor 1.

[0204] According to some embodiments of the present application, the linear motor 1 further includes a water channel connector 60, which is disposed at the end of the stator core shaft 21. The water channel connector 60 includes a liquid inlet 61 and a liquid outlet 62, each of which is connected to the cooling water channel. Specifically, as described above, the water channel opening 210b generally includes an inlet and an outlet. The liquid inlet 61 of the water channel connector 60 is connected to the inlet of the cooling water channel, and the liquid outlet 62 of the water channel connector 60 is connected to the outlet of the cooling water channel. In some embodiments, the water channel connector 60 of the linear motor 1 connects the cooling water channel of the linear motor 1 to the cooling circuit of the entire vehicle, thereby forming a closed cooling circuit.

[0205] Furthermore, the water channel joint 60 and the end of the stator core shaft 21 may be fixedly connected by fasteners or by other structures.

[0206] In some embodiments, the water channel joint 60 can be connected to the end of the stator core shaft 21, and the connection method can be a bolt connection. In the actual design, the base 63 of the water channel joint 60 is constructed as a plane, and it is connected to the stator core shaft 21 in surface contact, which can ensure that the water channel joint 60 and the stator core shaft 21 are tightly fitted, and the water channel joint 60 and the stator core shaft 21 are locked by connecting bolts, which will have better sealing performance, easy installation, and low assembly cost.

[0207] According to some embodiments of the present application, the waterway connector 60 is provided with an escape space 60a for circumventing the first connector 25. In some embodiments, the connector wire end is disposed at the first axial end of the stator core shaft 21 and is connected to the insulating member 32 located in the wiring space 21c of the stator core shaft 21. The waterway connector 60 is also disposed at the first axial end of the stator core shaft 21 and communicates with the waterway opening 210b located at the end of the stator core shaft 21. Compared to the waterway connector 60, the connector wire end is located axially inward of the stator core shaft 21. To avoid interference between the waterway connector 60 and the first connector 25 during assembly, the escape space 60a is provided in the waterway connector 60 to facilitate installation of the waterway connector 60 and the connector wire end.

[0208] In some embodiments, the base 63 of the water channel connector 60, i.e., the bottom wall of the avoidance space 60a, is used to support the first connector 25. The linear motor 1 further includes connecting bolts that pass through the first connector 25 and the water channel connector 60 in sequence and are secured to the stator core shaft 21. In some embodiments, the first connector 25 and the water channel connector 60 are secured to the stator core shaft 21 and / or the insulating member 32 by the connecting bolts.

[0209] According to some embodiments of the present application, as shown in Figure 2, a guide hole 21e is provided in the stator core shaft 21, and the mover assembly 10 includes a guide column 12 that slides with the guide hole 21e. It can be understood that the guide column 12 and the guide hole 21e should slide in the axial direction to limit the mover assembly 10 and the stator assembly 20 to relative movement only in the axial direction, which can improve the matching stability of the mover assembly 10 and the stator assembly 20, and at the same time ensure the working stability of the linear motor 1.

[0210] In some embodiments, the wiring space 21c is opened at the first axial end of the shaft wall 210 and extends in the axial direction, and the wiring space 21c facilitates the arrangement of other structures; the guide hole 21e is opened at the second axial end of the shaft wall 210 and also extends in the axial direction, and the guide hole 21e is suitable for sliding cooperation with the guide column 12.

[0211] According to some embodiments of the present application, as shown in FIG. 2 , the guide hole 21 e is connected to the wiring space 21 c to avoid pressure fluctuations in the guide hole 21 e when the guide post 12 moves.

[0212] According to some embodiments of the present application, as shown in FIG2 , one of the mover assembly 10 and the stator assembly 20 is provided with a housing 13 and the other is movably provided in the housing 13 to define a first chamber 13a with a variable volume. The first chamber 13a is located on the side of the winding assembly 22 away from the wiring space 21c. The first chamber 13a is provided with a gas channel 130 connected to the guide hole 21e. Specifically, when the mover assembly 10 and the stator assembly 20 move relative to each other, the guide post 12 moves inside the guide hole 21e to repeatedly compress the gas in the guide hole 21e. In order to avoid air pressure fluctuations in the guide hole 21e when the guide post 12 moves, the guide hole 21e is connected to the first chamber 13a through the gas channel 130 to reduce the impact of air pressure fluctuations caused by the movement of the guide post 12, thereby improving the working stability of the linear motor 1.

[0213] In some embodiments, the housing 13 is configured as a part of the mover assembly 10 , the stator assembly 20 is disposed in the housing 13 , and the housing 13 is adapted to move axially relative to the stator core shaft 21 when the winding assembly 22 is coupled to the excitation assembly 11 .

[0214] According to some embodiments of the present application, as shown in FIG. 2 and FIG. 3 , a sliding bearing 14 is provided between the guide column 12 and the guide hole 21 e , and the gas channel 130 includes a first ventilation flow channel 14 a , which is provided on the sliding bearing 14 . Specifically, by arranging part of the structure of the stator assembly 20 along the axial direction of the housing 13, one axial end of the stator assembly 20 can define a first chamber 13a between the housing 13, and a sliding bearing 14 is provided between the stator assembly 20 and the mover assembly 10. A first ventilation flow channel 14a is opened on the sliding bearing 14 to increase the connecting air gap of the first chamber 13a, so that the air flow 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 chamber 13a and the guide hole 21e can be realized through the first ventilation flow channel 14a, thereby increasing the flow area between the first chamber 13a and the guide hole 21e, facilitating the adjustment of the pressure difference between the first chamber 13a and the guide hole 21e, and making 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 1, and processing the first ventilation flow channel 14a on the sliding bearing 14 is more convenient and simple, which is beneficial to reducing production costs.

[0215] According to some embodiments of the present application, as shown in Figure 2, the mover assembly 10 includes a housing 13, the stator assembly 20 also includes a buffer 26, the buffer 26 is arranged at the end of the winding assembly 22, the gas channel 130 also includes a second ventilation flow channel 13b connected to the first ventilation flow channel 14a, and the second ventilation flow channel 13b is defined between the buffer 26 and the outer peripheral wall of the guide column 12. Specifically, the buffer 26 can be arranged at the end of the winding assembly 22 facing the inner wall of the first chamber 13a. In some embodiments, the buffer 26 can also be arranged at the end of the winding assembly 22 and sleeved on the outer peripheral wall of the guide column 12, and be gap-matched with the guide column 12. At this time, the gap between the buffer 26 and the outer peripheral surface of the guide column 12 is the second ventilation flow channel 13b. The second ventilation flow channel 13b can work together with the first ventilation flow channel 14a to realize the flow of air between the first chamber 13a and the guide hole 21e, further increasing the flow area between the first chamber 13a and the guide hole 21e, and facilitating the adjustment of the pressure difference between the first chamber 13a and the guide hole 21e.

[0216] When the winding assembly 22 is coupled with the excitation assembly 11, the mover assembly 10 and the stator assembly 20 move relative to each other. At this time, the buffer member 26 first contacts the inner wall of the first chamber 13a, and at the same time slows down the trend of relative movement between the mover assembly 10 and the stator assembly 20, avoiding a large collision between the stator core shaft 21 and the housing 13, thereby playing a buffering role.

[0217] According to some embodiments of the present application, as shown in FIG11 , the winding assembly 22 includes a stator core 223, a coil disk 224, and an insulating frame 225. The stator core 223 is provided with a plurality of placement slots 223a arranged along the axial direction; each placement slot 223a is provided with at least one coil disk 224; and the insulating frame 225 is provided between the stator core 223 and the coil disk 224. Specifically, the insulating frame 225 can be provided to cover the outer surface of the coil disk 224 to insulate adjacent coil disks 224. Furthermore, the provision of the insulating frame 225 can increase creepage distance and ensure overall insulation performance.

[0218] According to some embodiments of the present application, as shown in FIG11 , the insulating frame 225 is provided with a guide block 2251 extending to the outer peripheral wall of the stator core 223. The guide block 2251 is used to isolate the lead wires 2221 of the coil disk 224 from the stator core 223. Specifically, providing the guide block 2251 on the insulating frame 225 can further increase the creepage distance and better ensure the overall insulation performance.

[0219] According to some embodiments of the present application, as shown in FIG11 , each placement slot 223a is provided with multiple fixedly mating insulating frames 225 . The multiple insulating frames 225 within the same placement slot 223a define a placement space for the coil disk 224 . In some embodiments, the insulating frames 225 within the same placement slot 223a include an upper insulating frame 2253 and a lower insulating frame 2252 , which are sequentially arranged in the axial direction. The upper insulating frames 2253 and the lower insulating frames 2252 jointly define a placement space for the coil disk 224 . This placement space, defined by the upper insulating frames 2253 and the lower insulating frames 2252 , facilitates the placement of the coil disk 224 .

[0220] According to some embodiments of the present application, multiple insulating frames 225 within the same placement slot 223a are snap-fitted. In some embodiments, the insulating frames 225 within the same placement slot 223a include an upper insulating frame 2253 and a lower insulating frame 2252 arranged sequentially in the axial direction. The upper insulating frame 2253 and the lower insulating frame 2252 snap-fit ​​together to facilitate assembly of the upper insulating frame 2253 and the lower insulating frame 2252, thereby improving the assembly efficiency of the linear motor 1.

[0221] According to some embodiments of the present application, an avoidance groove 223b is provided at any corner of the placement groove 223a. It can be understood that since a coil disk 224 is provided in the placement groove 223a, in order to improve the slot fill rate, an avoidance groove 223b is designed at the corner of the placement groove 223a, which is recessed toward the side away from the placement groove 223a and connected to the placement groove 223a, so as to avoid the corners of the coil disk 224, thereby improving the slot fill rate.

[0222] According to some embodiments of the present application, as shown in Figure 11, the outer peripheral wall of the stator core 223 is provided with a bridge wire slot 223c for the lead wire to pass through the coil disk 224, and the relative side walls of the bridge wire slot 223c transition with the rest of the outer peripheral wall of the stator core 223 in a circular arc. The chamfered design of this part facilitates the assembly of the winding and the stator core 223, and at the same time avoids excessive wear on the outer surface of the lead wire caused by the part of the stator core 223 with the bridge wire slot 223c, thereby extending the service life of the lead wire and reducing the maintenance cost of the linear motor 1.

[0223] According to some embodiments of the present application, as shown in FIG11 , the maximum dimension of the portion of the stator core 223 between two adjacent bridge slots 223c in the circumferential direction of the stator core shaft 21 is smaller than the minimum dimension between two adjacent lead wires. Specifically, the lead wires are generally disposed in the middle portion of the bridge slots 223c in the circumferential direction of the stator core shaft 21. In this case, the maximum dimension of the portion of the stator core 223 between two adjacent bridge slots 223c in the circumferential direction of the stator core shaft 21 is smaller than the minimum dimension between two adjacent lead wires in the circumferential direction of the stator core shaft 21.

[0224] Several embodiments of the present application are described below by taking the coil disk 224 including three-phase coils as an example.

[0225] According to the first embodiment of the present application, the stator assembly 20 includes a stator core 223 and a coil disk 224. The stator core 223 includes a plurality of sub-cores 2231 arranged in sequence along the axial direction, with placement slots 223a formed between adjacent sub-cores 2231. The coil disk 224 is mounted on the stator core 223. Each phase coil also includes lead wires 2221, which are accommodated within the placement slots 223a. Each placement slot 223a can accommodate a single layer of coils or multiple layers of coils arranged axially along the stator core 223. The lead wires 2221 can be located on the outer circumference of the stator core 223. Coils of the same phase located in different placement slots 223a are connected by corresponding lead wires 2221. The lead wires 2221 of at least three phase coils are spaced apart along the circumference of the stator core 223, and the lead wires 2221 include first phase lead wires, second phase lead wires, and third phase lead wires.

[0226] Taking the stator assembly 20 for a three-phase linear motor as an example, the coil disk 224 of the stator assembly 20 includes three-phase coils, which are respectively a first-phase coil, a second-phase coil and a third-phase coil. Accordingly, the first-phase coil can be a U-phase coil, the second-phase coil can be a V-phase coil, and the third-phase coil can be a W-phase coil. The first-phase coil includes a first-phase lead wire, the second-phase coil includes a second-phase lead wire, and the third-phase coil includes a third-phase lead wire.

[0227] The first-phase lead wires, the second-phase lead wires, and the third-phase lead wires are spaced apart along the circumference of the stator core 223, and are arranged at 120° angles between each other. The first-phase coils located in different placement slots 223a are connected by the first-phase lead wires, the second-phase coils located in different placement slots 223a are connected by the second-phase lead wires, and the third-phase coils located in different placement slots 223a are connected by the third-phase lead wires.

[0228] Among them, the outer peripheral wall of the sub-iron core 2231 is provided with a bridge wire groove 223c for the lead-out wire 2221 to pass through. The bridge wire groove 223c can facilitate the passing of the lead-out wire 2221. The bridge wire groove 223c can also play a certain protective role for the lead-out wire 2221, and can reduce the possibility of the lead-out wire 2221 protruding radially outward and scratching the external components of the stator assembly 20; and can make the overall structure of the lead-out wire 2221 and the bridge wire groove 223c more compact, thereby making the overall structure of the stator assembly 20 more compact.

[0229] In the circumferential direction of the sub-core 2231, the part of the sub-core 2231 located between two adjacent bridge wire slots 223c is the core protrusion 111, the core protrusion 111 located between the first phase lead wire and the second phase lead wire is the protrusion, the core protrusion 111 located between the second phase lead wire and the third phase lead wire is the second core protrusion 113, and the core protrusion 111 located between the third phase lead wire and the first phase lead wire is the third core protrusion 114.

[0230] The midpoint of the convex portion in the circumferential direction of the sub-core 2231 is the midpoint C of the first convex block, the line connecting the center B of the sub-core 2231 and the midpoint C of the first convex block is the first radial reference line d, the plane perpendicular to the first radial reference line d is the first reference plane, the projection of the convex portion on the first reference plane is the first projection, the projection of the first phase lead wire on the first reference plane is the second projection, the projection of the second phase lead wire on the first reference plane is the third projection, the maximum length w1 of the first projection in the reference direction e is less than the minimum distance w2 between the second projection and the third projection, the reference direction e is the first projection. The reference direction e is perpendicular to the first radial reference line d and the reference direction e is perpendicular to the axial direction of the stator core 223, which can facilitate the first phase lead wire and the second phase lead wire to pass through two adjacent bridge slots 223c, thereby making the assembly of the stator core 223 and the coil disk 224 more convenient; and it can reduce the possibility of the stator core 223 scratching the first phase lead wire or the second phase lead wire when the first phase lead wire and the second phase lead wire pass through two adjacent bridge slots 223c during the assembly process of the stator core 223 and the coil disk 224.

[0231] Taking the stator assembly 20 used in a three-phase linear motor as an example, the assembly process of the coil disk 224 and the stator core 223 of the stator assembly 20 is described as follows:

[0232] First, the first-phase coil, the second-phase coil, and the third-phase coil are manufactured separately.

[0233] Insert the coil of the first phase coil into the placement slot 223a along the radial direction of the stator core 223, pass the first phase lead wire through the bridge wire slot 223c, and assemble with the corresponding sub-core 2231 to form a first phase sub-assembly. The first phase lead wire passes through the bridge wire slot 223c, which can reduce the scratching of the first phase lead wire by the sub-core 2231 in the first phase sub-assembly; insert the coil of the second phase coil into the placement slot 223a along the radial direction of the stator core 223, pass the second phase lead wire through the bridge wire slot 223c, and assemble with the corresponding sub-core 223 1 is assembled to form a second-phase subassembly, and the second-phase lead wire passes through the bridge wire slot 223c, which can reduce the scratching of the second-phase lead wire by the sub-iron core 2231 in the second-phase subassembly; the coil of the third-phase coil is inserted into the placement slot 223a along the radial direction of the stator iron core 223, and the third-phase lead wire passes through the bridge wire slot 223c. It is assembled with the corresponding sub-iron core 2231 to form a third-phase subassembly, and the third-phase lead wire passes through the bridge wire slot 223c, which can reduce the scratching of the third-phase lead wire by the sub-iron core 2231 in the third-phase subassembly.

[0234] Secondly, the first phase subassembly and the second phase subassembly are plugged in radially along the stator core 223 to complete the assembly of the first phase subassembly and the second phase subassembly. At this time, the first phase lead wire and the second phase lead wire are arranged at intervals along the circumference of the stator core 223.

[0235] Finally, the third phase subassembly is inserted between the assembled first phase subassembly and the second phase subassembly along the radial direction of the stator core 223. The protrusion of the sub-core 2231 of the third phase subassembly needs to pass through the space between the first phase lead wire and the second phase lead wire. By ensuring that the maximum length w1 of the first projection of the protrusion on the first reference plane in the reference direction is less than the minimum distance w2 between the second projection of the first phase lead wire on the first reference plane and the second projection of the second phase lead wire on the first reference plane, the assembly of the third phase subassembly on the first phase subassembly and the second phase subassembly can be made more efficient, and the scratching of the first phase lead wire or the second phase lead wire by the sub-core 2231 of the third phase subassembly during the plugging process of the third phase subassembly into the first phase subassembly and the second phase subassembly can be reduced.

[0236] According to the stator assembly 20 of the embodiment of the present application, a bridge wire groove 223c for avoiding the lead wire 2221 is set on the outer peripheral wall of the stator core 223, and in the circumferential direction of the stator core 223, the projection of the protrusion on the first reference plane is the first projection, the projection of the first phase lead wire on the first reference plane is the second projection, and the projection of the second phase lead wire on the first reference plane is the third projection. The maximum length of the first projection in the reference direction is less than the minimum distance between the second projection and the third projection. This can make the assembly of the coil disk 224 and the stator core 223 more convenient, and can reduce the possibility that the stator core 223 will damage the lead wire 2221 during the assembly of the stator core 223 and the coil disk 224; and can make the overall structure of the stator assembly 20 more compact.

[0237] According to some embodiments of the present application, the projection of the bridge wire slot 223c on the second reference plane is a fourth projection, the second reference plane is perpendicular to the axial direction of the stator core 223, and the fourth projection includes two slot sides that are relatively arranged along the circumferential direction of the sub-core 2231. In the radial outward direction from the sub-core 2231, the distance between the two slot sides of the fourth projection gradually increases, so that the slot opening of the bridge wire slot 223c can be expanded and open, making it more convenient for the lead wire 2221 connecting the same phase coil to pass through the bridge wire slot 223c, and reducing the possibility of the lead wire 2221 being scratched by the stator core 223 when passing through the bridge wire slot 223c.

[0238] According to some embodiments of the present application, at least a portion of the slot side is arc-shaped, which can reduce the scratches caused by the lead wire 2221 on the stator core 223 when passing through the bridge slot 223c during the assembly process of the stator core 223 and the coil disk 224.

[0239] The fact that at least part of the groove side is arc-shaped may include the following situations: for example, the entire groove side is arc-shaped; for another example, a part of the groove side is arc-shaped.

[0240] According to some embodiments of the present application, the fourth projection includes a slot bottom edge, which is connected between two slot side edges, and the slot bottom edge extends in a straight line. For example, the slot bottom edge extends in a straight line along the circumference of the sub-core 2231, and the lead wire 2221 is flat, which facilitates the lead wire 2221 to pass through the bridge wire slot 223c, thereby reducing the scratches on the lead wire 2221 by the stator core 223.

[0241] According to some embodiments of the present application, a transition section is connected between the bottom edge of the slot and the side edge of the slot, and the transition section is arc-shaped, so that the side edge and the bottom edge of the slot of the bridge wire slot 223c have a smooth transition, which can reduce the scratches caused by the lead wire 2221 on the stator core 223 when passing through the bridge wire slot 223c during the assembly of the stator core 223 and the coil disk 224.

[0242] According to some embodiments of the present application, the projection of the bridge slot 223c on the second reference plane is located within the projection of the corresponding bridge slot 223c on the second reference plane, and the second reference plane is perpendicular to the axial direction of the stator core shaft 21. The lead wire 2221 is located within the bridge slot 223c, which makes the overall structure of the lead wire 2221 and the stator core 223 compact and prevents the lead wire 2221 from protruding radially outward in the stator core 223 and scratching external components.

[0243] According to some embodiments of the present application, the stator core 223 is provided with at least one slot to reduce eddy current loss in the stator core 223. In some embodiments, the slot penetrates the stator core 223 in the axial direction and extends in the radial direction of the stator core 223.

[0244] According to some embodiments of the present application, as shown in Figure 2, a guide hole 21e is provided in the stator core shaft 21; the mover assembly 10 includes a shell 13 and a cover body 15, the shell 13 is a cylindrical structure, the shell 13 covers the stator assembly 20, and the cover body 15 is detachably connected to the lower end of the shell 13; the mover assembly 10 also includes a guide column 12, which is installed in the internal cavity of the shell 13, and the guide column 12 includes a connected guide portion 121 and a fixing portion 122, the fixing portion 122 is connected to the cover body 15, and the guide portion 121 and the guide hole 21e are slidably fitted. Specifically, the mover assembly 10 is provided with a shell 13. In actual use, the shell 13 can be set to a cylindrical shell 13 or a rectangular shell 13, etc. according to the use requirements. In this embodiment, the shell 13 is set to a cylindrical structure. The shell 13 can support the overall structure of the linear motor 1, and thus the shell 13 can protect the internal components of the linear motor 1, so that the internal components of the linear motor 1 will not be affected by the outside world, and can also avoid the potential pollution hazards caused by the internal components of the linear motor 1 to the environment, thereby improving the environmental friendliness of the linear motor 1 when in use.

[0245] Furthermore, the mover assembly 10 is provided with a cover 15, which is provided at the end of the shell 13, and the cover 15 is detachably connected to the shell 13, which is convenient for assembly and later maintenance, etc., and after the cover 15 is connected to the shell 13, the cover 15 and the shell 13 can move together, and after the cover 15 is connected to the shell 13, the cover 15 and the shell 13 jointly define an internal cavity. At the same time, the mover assembly 10 is also provided with a guide column 12, which can be set in the internal cavity. The guide column 12 is provided A guide portion 121 and a fixing portion 122 are provided. The guide portion 121 is connected to the fixing portion 122, and the fixing portion 122 is connected to the cover body 15. The guide portion 121 is connected to the side of the fixing portion 122 facing away from the cover body 15, that is, the guide portion 121 can extend into the internal cavity. When the movable assembly 10 and the stator assembly 20 move relative to each other, the guide portion 121 and the guide hole 21e slide relative to each other in the axial direction to limit the movable assembly 10 and the stator assembly 20 to move relative to each other only in the axial direction.

[0246] In some embodiments, one of the fixing portion 122 and the cover 15 is provided with an axially protruding annular sealing portion, and the annular sealing portion is in direct or indirect contact with the inner circumferential wall of the housing 13. Specifically, one of the fixing portion 122 and the cover 15 is provided with an axially protruding annular sealing portion, that is, the axially protruding annular sealing portion is provided on the fixing portion 122, or the axially protruding annular sealing portion is provided on the cover 15. Specifically in this embodiment, the annular sealing portion is provided on the fixing portion 122. Thus, after the fixing portion 122 and the cover body 15 are fixedly connected as a whole, the annular sealing portion directly or indirectly abuts against the inner peripheral wall of the shell 13, so that the annular sealing portion and the inner peripheral wall of the shell 13 can be directly or indirectly limited in the radial direction. That is, the annular sealing portion can be directly in contact with the inner peripheral wall of the shell 13, and then limited in the radial direction, or the annular sealing portion can be indirectly in contact with the inner peripheral wall of the shell 13, and then limited in the radial direction. The shell 13 is set as a cylindrical structure, thereby ensuring the coaxiality between the guide column 12 and the shell 13, and improving the accuracy of the operation of the linear motor 1. At the same time, a sealing structure can also be provided at the connection between the cover body 15 and the shell 13 and the radial limit fit between the guide column 12 and the shell 13, greatly improving the sealing performance of the mover assembly 10.

[0247] The suspension system 1000 according to the present application is briefly described below.

[0248] As shown in Figure 34, the suspension system 1000 according to the present application includes the linear motor 1 described in any one of the above-mentioned embodiments. Since the suspension system 1000 according to the present application is provided with the linear motor 1 described in the above-mentioned embodiments, the suspension system 1000 has a higher degree of integration, fewer parts, lower manufacturing costs, and better heat dissipation effect.

[0249] The vehicle 10000 according to the present application is briefly described below.

[0250] As shown in FIG35 , the vehicle 10000 according to the present application includes the suspension system 1000 described in the above embodiment. Since the vehicle 10000 according to the present application is provided with the suspension system 1000 of the above embodiment, the vehicle 10000 has higher driving comfort and better user experience.

[0251] In summary, according to the stator assembly 20 of the present application, the stator core shaft 21 thereof is integrated with a cooling function. The stator assembly 20 has a small number of parts, a low manufacturing cost, and a better heat dissipation effect.

[0252] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification.

[0253] While embodiments of the present application have been shown and described above, changes, modifications, substitutions, and variations may be made to the embodiments described above.

Claims

1. A stator assembly (20), comprising: A stator core shaft (21), the stator core shaft (21) comprising a shaft wall (210), a cooling water channel extending in its axial direction being provided in the shaft wall (210), a water channel opening (210b) being provided on the shaft wall (210), and the water channel opening (210b) being in communication with a first end of the cooling water channel; A winding assembly (22), wherein the winding assembly (22) is sleeved on the outer periphery of the stator core shaft (21); The cooling water channel comprises a first cooling water channel (2101a), the first cooling water channel (2101a) exchanges heat with the winding assembly (22), and the cross-sectional area of ​​at least part of the first cooling water channel (2101a) is larger than the area of ​​the water channel opening (210b).

2. The stator assembly (20) according to claim 1, wherein: The water channel opening (210b) is formed by the cooling water channel penetrating the first axial end of the shaft wall (210).

3. The stator assembly (20) according to claim 2, wherein: The cooling water channel also includes a second cooling water channel (2102a). In the axial direction of the stator core shaft (21), the second cooling water channel (2102a) and the first cooling water channel (2101a) are arranged in sequence, and the water channel opening (210b) is directly connected to the second cooling water channel (2102a).

4. The stator assembly (20) according to claim 3, wherein: The cross-sectional area of ​​the first cooling water channel (2101a) is greater than the cross-sectional area of ​​the second cooling water channel (2102a).

5. The stator assembly (20) according to claim 4, wherein: The cross-sectional area of ​​the second cooling water channel (2102a) is greater than the cross-sectional area of ​​the water channel opening (210b).

6. The stator assembly (20) of claim 3, wherein: In the radial direction of the stator core shaft (21), the second cooling water channel (2102a) is arranged more outward than the first cooling water channel (2101a), a guide channel (2103a) is provided between the first cooling water channel (2101a) and the second cooling water channel (2102a), and the wall thickness of the stator core shaft (21) at the guide channel (2103a) is greater than the wall thickness of the stator core shaft (21) at the position where the first cooling water channel (2101a) and the guide channel (2103a) are connected.

7. The stator assembly (20) of claim 3, wherein: In the circumferential direction of the stator core shaft (21), there are multiple first cooling water channels (2101a) and they are arranged along the circumferential direction, at least two of the first cooling water channels (2101a) are connected to the same second cooling water channel (2102a), and the sum of the cross-sectional areas of the at least two first cooling water channels (2101a) is greater than the cross-sectional area of ​​the same second cooling water channel (2102a) connected to them.

8. The stator assembly (20) according to claim 7, wherein: Reinforcing ribs are provided between two adjacent first cooling water channels (2101a).

9. The stator assembly (20) of claim 6, wherein: The first cooling water channel (2101a) comprises a first liquid inlet water channel section (21011a) and a first liquid outlet water channel section (21012a) arranged at intervals in the circumferential direction of the stator core shaft (21); the first liquid inlet water channel section (21011a) and the first liquid outlet water channel section (21012a) are connected at an end away from the water channel opening (210b).

10. The stator assembly (20) of claim 9, wherein: The second cooling water channel (2102a) includes a second liquid inlet water channel section (21021a) and a second liquid outlet water channel section (21022a), the inlet end of the second liquid inlet water channel section (21021a) is connected to the inlet of the water channel opening (210b), the outlet end of the second liquid inlet water channel section (21021a) is connected to the inlet end of the first liquid inlet water channel section (21011a), the inlet end of the second liquid outlet water channel section (21022a) is connected to the outlet end of the first liquid outlet water channel section (21012a), and the outlet end of the second liquid outlet water channel section (21022a) is connected to the outlet of the water channel opening (210b).

11. The stator assembly (20) of claim 10, wherein: The central angle corresponding to the circumference of the first liquid inlet water channel section (21011a) is the first central angle α, and the central angle corresponding to the circumference of the second liquid inlet water channel section (21021a) is the second central angle β, and α>β.

12. The stator assembly (20) of claim 10, wherein: The central angle corresponding to the circumference of the first liquid outlet water channel section (21012a) is the third central angle θ, and the central angle corresponding to the circumference of the second liquid outlet water channel section (21022a) is the fourth central angle γ, θ>γ.

13. A linear motor (1), wherein: include: The stator assembly (20) according to any one of claims 1 to 12; as well as A movable subassembly (10) and a stator assembly (20) are movable relative to each other.

14. The linear motor (1) according to claim 13, wherein: Also includes: A conductive component (30), one end of the conductive component (30) is connected to the winding component (22), and the other end is used to connect to the motor controller; The cooling water channel further comprises a second cooling water channel (2102a), and the second cooling water channel (2102a) is used for heat exchange with the conductive component (30).

15. The linear motor (1) according to claim 13, wherein: It also includes a detection device for detecting the displacement of the movable subassembly (10).

16. The linear motor (1) according to claim 15, wherein: The detection device comprises an inductive element (41) and an inductive reading head (42), wherein the inductive element (41) is arranged on the stator core shaft (21), and the inductive reading head (42) is arranged on the mover assembly (10), and the inductive reading head (42) is coupled to the inductive element (41) to detect the position of the mover assembly (10).

17. The linear motor (1) according to claim 16, wherein: The induction component (41) is arranged on the outer peripheral wall of the stator core shaft (21). The stator assembly (20) further includes a covering component (23). The covering component (23) is arranged on the stator core shaft (21) to cover the induction component (41).

18. The linear motor (1) according to claim 17, wherein: The outer peripheral wall of the stator core shaft (21) is provided with a receiving groove (21a), and the induction component (41) is placed in the receiving groove (21a).

19. The linear motor (1) according to claim 18, wherein A portion of the peripheral wall of the stator core shaft (21) is recessed inward to define the accommodating groove (21a).

20. The linear motor (1) according to claim 19, wherein One axial end of the accommodating groove (21a) is open to define a mounting opening (21b) of the inductive component (41), and the stator assembly (20) further comprises a blocking member (24) for blocking the mounting opening (21b).

21. The linear motor (1) according to claim 18, wherein In the circumferential direction of the stator core shaft (21), the accommodating groove (21a) and the cooling water channel are staggered.

22. The linear motor (1) according to claim 17, wherein: The cover (23) is externally mounted on the outer peripheral wall of the stator core shaft (21).

23. The linear motor (1) according to claim 17, wherein: The covering member (23) comprises a first body portion (231) and a cover plate (232); the cover plate (232) is fixed to the first body portion (231) and is arranged radially opposite to the sensing member (41).

24. The linear motor (1) according to claim 17, wherein The induction component (41) is a magnetic induction component, and the covering component (23) is made of a non-magnetic conductive material.

25. A suspension system (1000), wherein: It comprises a linear motor (1) according to any one of claims 13-24.

26. A vehicle (10000), wherein: Comprising a suspension system (1000) according to claim 25.

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