Stator assembly, linear motor, suspension system and vehicle

Abstract

The utility model discloses a stator assembly, a linear motor, a suspension system and a vehicle, the stator assembly comprises a stator core shaft, the stator core shaft comprises a shaft wall, the shaft wall is internally provided with a first cooling water channel, the peripheral wall of the stator core shaft is provided with a positioning groove, and the first cooling water channel is arranged in the positioning groove in the circumferential direction of the stator core shaft. The first cooling water channels and the positioning grooves are arranged at intervals; the stator core is sleeved outside the stator core shaft, the first cooling water channel exchanges heat with the stator core, the inner circumferential wall of the stator core is provided with a positioning protrusion, and the positioning protrusion is located in the positioning groove. According to the utility model, the positions of the first cooling water channels and the positioning grooves in the stator core shaft are arranged more reasonably, the structural strength of the stator core shaft is high, the cooling effect on the stator core is good, and the working performance of the stator assembly can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, and more specifically, to a stator assembly, a linear motor, a suspension system and a vehicle. Background Art

[0002] In the related art, the stator assembly includes a stator core shaft and a stator core, the stator core is sleeved outside the stator core shaft and fixed to the stator core shaft, and a cooling water channel is provided in the stator core shaft to cool the stator core. However, the cooling water channel structure design of the stator core shaft in the related art is unreasonable, the cooling effect is poor, and the structural strength is low. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a stator assembly with high structural strength and good working performance.

[0004] Another object of the present invention is to provide a linear motor having the above-mentioned stator assembly.

[0005] Another object of the present invention is to provide a suspension system having the above linear motor.

[0006] Another object of the present invention is to provide a vehicle with the above suspension system.

[0007] According to the stator assembly of the embodiment of the utility model, it includes: a stator core shaft, the stator core shaft includes a shaft wall, a first cooling water channel is arranged in the shaft wall, a positioning groove is arranged on the outer peripheral wall of the stator core shaft, and the first cooling water channel and the positioning groove are arranged at intervals in the circumferential direction of the stator core shaft; a stator core, the stator core is outer-mounted on the stator core shaft, the first cooling water channel and the stator core are in heat exchange, and the inner peripheral wall of the stator core is provided with a positioning protrusion, and the positioning protrusion is located in the positioning groove.

[0008] According to the stator assembly of the embodiment of the utility model, the first cooling water channel and the positioning groove are arranged at intervals in the circumferential direction of the stator core shaft, so that the positioning groove does not occupy the wall thickness of the first cooling water channel. On the one hand, the wall thickness of each part of the first cooling water channel can be made more uniform, easy to cast, and the side wall of the first cooling water channel is not easy to break. Correspondingly, the overall structural strength of the stator core shaft is also higher, and the positioning groove has a better limiting effect on the stator core; on the other hand, under the premise that the wall thickness of the first cooling water channel meets the use requirements, the cross-sectional area of ​​the first cooling water channel can be as large as possible to increase the heat exchange area, reduce the flow resistance, and improve the cooling effect.

[0009] In addition, the stator assembly according to the above embodiment of the utility model may also have the following additional technical features:

[0010] According to some embodiments of the present invention, the radial wall thickness of the portion of the shaft wall where the positioning groove is provided is greater than the radial width of the first cooling water channel.

[0011] According to some embodiments of the utility model, the first cooling water channel includes a first liquid inlet channel and a first liquid outlet channel that are connected, the first liquid inlet channels include at least two and / or the first liquid outlet channels include at least two, a first rib is provided between two adjacent first liquid inlet channels and / or between two adjacent first liquid outlet channels, a second rib is provided between adjacent first liquid inlet channels and first liquid outlet channels, in the circumferential direction of the stator core shaft, the size of the second rib is larger than the size of the first rib, and the positioning groove is provided on the outer wall of the second rib.

[0012] According to some embodiments of the present invention, in the radial direction of the stator core shaft, the radial thickness of the first rib is smaller than the radial wall thickness of a portion of the second rib where the positioning groove is provided.

[0013] According to some embodiments of the present invention, the stator assembly further includes a conductive component and a second cooling water channel, wherein the second cooling water channel is disposed in the shaft wall, the shaft wall surrounds an accommodating chamber, the conductive component is disposed in the accommodating chamber and exchanges heat with the second cooling water channel.

[0014] According to some embodiments of the present invention, in the axial direction of the stator core shaft, the second cooling water channel is connected to the first cooling water channel, and one end of the second cooling water channel is a liquid inlet or a liquid outlet.

[0015] According to some embodiments of the utility model, in the radial direction of the stator core shaft, the second cooling water channel is arranged closer to the outer peripheral wall of the stator core shaft 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 core shaft wall thickness at the guide channel is greater than the core shaft wall thickness at the position where the first cooling water channel is connected to the guide channel.

[0016] According to some embodiments of the utility model, 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 thereto.

[0017] According to some embodiments of the present invention, the stator core includes a plurality of stator blocks stacked and arranged axially along the stator core axis, and stator slots are provided between adjacent stator blocks;

[0018] The stator assembly further includes a stator winding, wherein the stator winding includes a plurality of coil disks, and the coil disks are disposed in the stator slots.

[0019] The linear motor according to the embodiment of the utility model includes the stator assembly according to the embodiment of the utility model.

[0020] According to the linear motor of the embodiment of the utility model, the first cooling water channel and the positioning groove are arranged at intervals in the circumferential direction of the stator core shaft, so that the positioning groove does not occupy the wall thickness of the first cooling water channel. On the one hand, the wall thickness of each part of the first cooling water channel can be made more uniform, easy to cast, and the side wall of the first cooling water channel is not easy to break. Correspondingly, the overall structural strength of the stator core shaft is also higher, and the positioning groove has a better limiting effect on the stator core; on the other hand, under the premise that the wall thickness of the first cooling water channel meets the use requirements, the cross-sectional area of ​​the first cooling water channel can be as large as possible to increase the heat exchange area, reduce the flow resistance, and improve the cooling effect.

[0021] The suspension system according to the embodiment of the utility model includes the linear motor according to the embodiment of the utility model.

[0022] According to the suspension system of the embodiment of the utility model, the first cooling water channel and the positioning groove are arranged at intervals in the circumferential direction of the stator core shaft, so that the positioning groove does not occupy the wall thickness of the first cooling water channel. On the one hand, the wall thickness of each part of the first cooling water channel can be made more uniform, easy to cast, and the side wall of the first cooling water channel is not easy to break. Correspondingly, the overall structural strength of the stator core shaft is also higher, and the positioning groove has a better limiting effect on the stator core; on the other hand, under the premise that the wall thickness of the first cooling water channel meets the use requirements, the cross-sectional area of ​​the first cooling water channel can be as large as possible to increase the heat exchange area, reduce the flow resistance, and improve the cooling effect.

[0023] A vehicle according to an embodiment of the present utility model includes a suspension system according to an embodiment of the present utility model.

[0024] According to the vehicle of the embodiment of the utility model, the first cooling water channel and the positioning groove are arranged at intervals in the circumferential direction of the stator core shaft, so that the positioning groove does not occupy the wall thickness of the first cooling water channel. On the one hand, the wall thickness of each part of the first cooling water channel can be made more uniform, easy to cast, and the side wall of the first cooling water channel is not easy to break. Correspondingly, the overall structural strength of the stator core shaft is also higher, and the positioning groove has a better limiting effect on the stator core; on the other hand, under the premise that the wall thickness of the first cooling water channel meets the use requirements, the cross-sectional area of ​​the first cooling water channel can be as large as possible to increase the heat exchange area, reduce the flow resistance, and improve the cooling effect.

[0025] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0027] Figure 1 It is a first three-dimensional structural schematic diagram of a stator core shaft in a stator assembly according to an embodiment of the utility model;

[0028] Figure 2 is a first cross-sectional view of a stator core shaft in a stator assembly according to an embodiment of the utility model;

[0029] Figure 3 is a second cross-sectional view of a stator core shaft in a stator assembly according to an embodiment of the utility model;

[0030] Figure 4 is a three-dimensional cross-sectional view of a stator core shaft in a stator assembly according to an embodiment of the utility model;

[0031] Figure 5 The stator core shaft of the stator assembly according to the embodiment of the utility model corresponds to Figure 2 Sectional view at the AA position;

[0032] Figure 6 The stator core shaft of the stator assembly according to the embodiment of the utility model corresponds to Figure 2 Cross-sectional view of the middle BB position;

[0033] Figure 7 is a cross-sectional view of a stator assembly according to an embodiment of the utility model;

[0034] Figure 8 It is a first model diagram of a cooling water channel in a stator assembly according to an embodiment of the utility model;

[0035] Fig. 9 is a second model diagram of a cooling water channel in a stator assembly according to an embodiment of the utility model;

[0036] Fig.10 is a third model diagram of a cooling water channel in a stator assembly according to an embodiment of the utility model;

[0037] Fig.11 yes Figure 8 A top view of

[0038] Fig.12 It is a structural schematic diagram of a stator core in a stator assembly according to an embodiment of the utility model;

[0039] Fig.13 is a cross-sectional view of a linear motor according to an embodiment of the utility model;

[0040] Fig.14 yes Fig.13 A partial map of

[0041] Fig.15 yes Fig.13 A partial enlarged view of part A;

[0042] Fig.16 yes Fig.13 A partial enlarged view of part B;

[0043] Fig.17 is a partial cross-sectional view of a linear motor according to an embodiment of the utility model;

[0044] Fig.18 is a second three-dimensional structural schematic diagram of a stator core shaft in a stator assembly according to an embodiment of the utility model;

[0045] Fig.19 is a first structural schematic diagram of a stator core shaft and a magnetic position sensor in a stator assembly according to an embodiment of the utility model;

[0046] Fig. 20 It is a second structural schematic diagram of the stator core shaft and the magnetic position sensor in the stator assembly according to an embodiment of the utility model.

[0047] Reference numerals:

[0048] Movable subassembly 10; housing 101; guide rod 102; fork arm 103;

[0049] Stator assembly 20;

[0050] stator core shaft 201; positioning groove 2011; through hole 2013; water pipe base 2014; liquid inlet 2012;

[0051] Liquid outlet 2015; stator core 202; positioning protrusion 2021; stator block 2022; stator slot 2023;

[0052] stator winding 203; coil disk 2031; lead wire 2032; fixing member 204;

[0053] The first cooling water channel 301; the first liquid inlet channel 3011; the first liquid outlet channel 3012; the second cooling water channel 302;

[0054] Guide channel 303; reinforcing rib 304; first rib 3041; second rib 3042; third cooling water channel 305;

[0055] A first sliding bearing 41; a second sliding bearing 42; a seal 50; a magnetic position sensor 60;

[0056] Outer sleeve 70; conductive component 80; connecting terminal 801; conductive component 802;

[0057] Linear motor 100. DETAILED DESCRIPTION

[0058] The embodiments of the present invention are described in detail below, and 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 invention, and cannot be understood as limiting the present invention.

[0059] In the description of the present utility model, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0060] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0061] The stator assembly 20 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0062] Reference Figure 1-Figure 20 As shown, the stator assembly 20 according to the embodiment of the present invention may include: a stator core shaft 201 and a stator core 202 .

[0063] The stator core shaft 201 includes an axis wall, and a first cooling water channel 301 is provided in the axis wall, and the first cooling water channel 301 is heat-exchanged with the stator core 202. It should be noted that the stator core 202 is provided with a stator winding 203, and the stator core 202 and the stator winding 203 will generate heat during the operation of the linear motor 100. If the heat cannot be dissipated in time, the linear motor 100 is prone to overheating, and the performance of the linear motor 100 will be reduced, and the linear motor 100 will be damaged in serious cases. By setting a cooling water channel in the shaft wall of the stator core shaft 201, the coolant will exchange heat with the shaft wall of the stator core shaft 201 after flowing through the cooling water channel, and then the shaft wall will exchange heat with the stator iron core 202, and the stator iron core 202 will exchange heat with the stator winding 203, so that the coolant can take away the heat generated by the stator iron core 202 and the stator winding 203, reduce the working temperature of the stator assembly 20, improve the performance of the linear motor 100, and reduce the possibility of overheating of the linear motor 100. The shaft wall of the stator core shaft 201 directly defines the cooling water channel, and no additional pipeline is required, which can effectively ensure the sealing of the cooling water channel.

[0064] like Figures 3 to 6 As shown, the outer peripheral wall of the stator core shaft 201 is provided with a positioning groove 2011, the stator core 202 is jacketed on the stator core shaft 201, and the inner peripheral wall of the stator core 202 is provided with a positioning protrusion 2021 (such as Fig.12 As shown in the figure, the positioning protrusion 2021 is located in the positioning groove 2011. The positioning protrusion 2021 is located in the positioning groove 2011, which can reduce the possibility of circumferential rotation of the stator core 202 relative to the stator core shaft 201 during movement, while improving the assembly accuracy of the stator core 202 and the stator core shaft 201, and while significantly weakening the eddy current loss, reduce the impact on the thrust and efficiency of the linear motor 100. For example, during the assembly process, the positioning protrusion 2021 can be made to form an interference fit with the positioning groove 2011 to ensure the connection strength and relative position stability between the stator core 202 and the stator core shaft 201. In some embodiments, the outer peripheral wall of the stator core shaft 201 can be interference fit with the inner peripheral wall of the stator core 202 to further improve the connection strength and relative position stability between the stator core 202 and the stator core shaft 201.

[0065] More specifically, the positioning groove 2011 extends along the axial direction of the stator core shaft 201 and is open at least at one axial end, so as to facilitate the installation of the stator core 202, for example, Figure 3As shown, the first end of the second section is connected to the first section, and the positioning groove 2011 is open at one end close to the second end of the second section. Only one positioning groove 2011 can be provided, or multiple positioning grooves 2011 can be provided at intervals along the circumference of the stator core shaft 201, wherein only one positioning groove 2011 is provided, so that the structural strength of the stator core shaft 201 is less affected. The number of positioning grooves 2011 can be less than or equal to the number of shaft walls between adjacent first cooling water channels 301; the number of positioning protrusions 2021 can be less than or equal to the number of positioning grooves 2011.

[0066] In the related art, the positioning groove is arranged on the radial outer wall of the first cooling water channel. The positioning groove will occupy the wall thickness of the first cooling water channel, making the local wall thickness of the first cooling water channel too thin, making the stator core shaft difficult to cast and easy to break; or by increasing the wall thickness of the first cooling water channel, that is, increasing the size of the stator core shaft, so that the wall thickness of the first cooling water channel is thick enough, which will cause the size of the entire stator assembly to increase and the production cost to increase.

[0067] You can refer to Figure 4 As shown, in the present application, the first cooling water channel 301 and the positioning groove 2011 are arranged at intervals in the circumferential direction of the stator core shaft 201. In this way, the positioning groove 2011 will not occupy the wall thickness of the first cooling water channel 301, the wall thickness of each part of the first cooling water channel 301 is relatively uniform, easy to cast, and the side wall of the first cooling water channel 301 is not easy to break. Correspondingly, the overall structural strength of the stator core shaft 201 is also higher, and the positioning groove 2011 has a better limiting effect on the stator core 202. On the premise that the wall thickness of the first cooling water channel 301 meets the use requirements, the cross-sectional area of ​​the first cooling water channel 301 can be as large as possible to increase the heat exchange area, reduce the flow resistance, and improve the cooling effect.

[0068] According to the stator assembly 20 of the embodiment of the utility model, the first cooling water channel 301 and the positioning groove 2011 are arranged at intervals in the circumferential direction of the stator core shaft 201, so that the positioning groove 2011 does not occupy the wall thickness of the first cooling water channel 301. On the one hand, the wall thickness of each part of the first cooling water channel 301 can be made more uniform, easy to cast, and the side wall of the first cooling water channel 301 is not easy to break. Correspondingly, the overall structural strength of the stator core shaft 201 is also higher, and the positioning groove 2011 has a better limiting effect on the stator core 202; on the other hand, under the premise that the wall thickness of the first cooling water channel 301 meets the use requirements, the cross-sectional area of ​​the first cooling water channel 301 can be as large as possible to increase the heat exchange area, reduce the flow resistance, and improve the cooling effect.

[0069] In some embodiments of the present invention, reference may be made to Figure 4 and Figure 5As shown, the radial wall thickness L1 of the portion of the shaft wall provided with the positioning groove 2011 is greater than the radial width L2 of the first cooling water channel 301. In this way, the closest distance between the positioning groove 2011 and the first cooling water channel 301 will not be too small, so that the circumferential side wall of the first cooling water channel 301 has sufficient strength, and the radial wall thickness of the portion of the shaft wall provided with the positioning groove 2011 will not be too small, so that the strength of the stator core shaft 201 in the circumferential direction will not be too low.

[0070] In some other embodiments, when the circumferential distance between the positioning groove 2011 and the first cooling water channel 301 is large, at this time, the mutual influence between the positioning groove 2011 and the first cooling water channel 301 is small, and the radial wall thickness L1 of the portion of the shaft wall where the positioning groove 2011 is provided may also be slightly less than or equal to the radial width L2 of the first cooling water channel 301.

[0071] In some embodiments of the present invention, Figure 4 , Figure 5 , Figures 8 to 10 As shown, the first cooling water channel 301 includes a first liquid inlet channel 3011 and a first liquid outlet channel 3012 that are connected. The first liquid inlet channel 3011 includes at least two first liquid inlet channels 3011. A first rib 3041 is provided between two adjacent first liquid inlet channels 3011. A second rib 3042 is provided between adjacent first liquid inlet channels 3011 and first liquid outlet channels 3012. In the circumferential direction of the stator core shaft 201, the size of the second rib 3042 is larger than that of the first rib 3041, and the positioning groove 2011 is provided on the outer wall of the second rib 3042.

[0072] In some embodiments of the present invention, Figure 4 , Figure 5 , Figures 8 to 10 As shown, the first cooling water channel 301 includes a first liquid inlet channel 3011 and a first liquid outlet channel 3012 that are connected. The first liquid outlet channel 3012 includes at least two first liquid outlet channels 3012. A first rib 3041 is provided between two adjacent first liquid outlet channels 3012. A second rib 3042 is provided between adjacent first liquid inlet channels 3011 and first liquid outlet channels 3012. In the circumferential direction of the stator core shaft 201, the size of the second rib 3042 is larger than that of the first rib 3041. The positioning groove 2011 is provided on the outer wall of the second rib 3042.

[0073] In some embodiments of the present invention, Figure 4 , Figure 5 , Figures 8 to 10As shown, the first cooling water channel 301 includes a first liquid inlet channel 3011 and a first liquid outlet channel 3012 that are connected. The first liquid inlet channel 3011 includes at least two, and the first liquid outlet channel 3012 includes at least two. A first rib 3041 is provided between two adjacent first liquid inlet channels 3011, a first rib 3041 is provided between two adjacent first liquid outlet channels 3012, and a second rib 3042 is provided between adjacent first liquid inlet channels 3011 and first liquid outlet channels 3012. In the circumferential direction of the stator core shaft 201, the size of the second rib 3042 is larger than the size of the first rib 3041, and the positioning groove 2011 is provided on the outer wall of the second rib 3042.

[0074] Specifically, the first liquid inlet channel 3011 and the first liquid outlet channel 3012 are interconnected, and after the coolant enters the stator core shaft 201, it will flow through the first liquid inlet channel 3011 and the first liquid outlet channel 3012 in sequence and then flow out of the stator core shaft 201. It can be understood that if the first liquid inlet channel 3011 and the first liquid outlet channel 3012 extend continuously in the circumferential direction and have a long length, the strength of the middle part of the stator core shaft 201 corresponding to the first liquid inlet channel 3011 and the first liquid outlet channel 3012 in the circumferential direction is relatively low. By arranging the first rib 3041 between adjacent first liquid inlet channels 3011 and the first liquid outlet channels 3012, the first rib 3041 can strengthen the side walls of the first liquid inlet channel 3011 and the first liquid outlet channel 3012, which is beneficial to improve the strength of the stator core shaft 201.

[0075] For example, the cross-sectional areas of the plurality of first liquid inlet channels 3011 may be equal, and the cross-sectional shapes may be the same. The cross-sectional areas of the plurality of first liquid outlet channels 3012 may be equal, and the cross-sectional shapes may be the same. In this way, the structural strength of the stator core shaft 201 is better.

[0076] In some embodiments of the present invention, reference may be made to Figure 5 As shown, in the radial direction of the stator core shaft 201, the radial thickness L3 of the first rib 3041 is less than the radial wall thickness L1 of the portion of the second rib 3042 provided with the positioning groove 2011. In this way, the radial wall thickness of the portion of the second rib 3042 provided with the positioning groove 2011 will not be too thin, the distance between the positioning groove 2011 and the first cooling water channel 301 will not be too close, and the structural strength of the portion of the second rib 3042 provided with the positioning groove 2011 will not be too low, and the stator core shaft 201 is not prone to cracking or damage at this location.

[0077] In some embodiments of the present invention, reference may be made to Figure 5As shown, in the circumferential direction of the stator core shaft 201, the circumferential thickness of the first rib 3041 is less than the circumferential thickness of the second rib 3042. It can be understood that the circumferential thickness of the second rib 3042 can already meet the strength requirement of the circumferential side wall of the first cooling water channel 301, and the circumferential thickness of the second rib 3042 is greater, so that the distance between the positioning groove 2011 and the first cooling water channel 301 can be farther, the positioning groove 2011 has a smaller impact on the strength of the circumferential side wall of the first cooling water channel 301, and the first cooling water channel 301 is less likely to be damaged and broken. At the same time, when the circumferential force generated when the stator core 202 rotates relative to the stator core shaft 201 acts on the positioning groove 2011, the positioning groove 2011 is also less likely to deform.

[0078] In some embodiments of the present invention, Figure 2 , Figure 7 , Fig.13 and Fig.14 As shown, the stator assembly 20 further includes a conductive assembly 80 and a second cooling water channel 302 . The second cooling water channel 302 is disposed in the shaft wall. The shaft wall surrounds an accommodating chamber. The conductive assembly 80 is disposed in the accommodating chamber and exchanges heat with the second cooling water channel 302 .

[0079] For example, see Fig.13 and Fig.14 As shown, the stator core shaft 201 includes a first section and a second section connected axially, a conductive component 80 is provided in the accommodating chamber of the first section, the second cooling water channel 302 is provided in the shaft wall of the first section, the stator core 202 is outer-mounted in the second section, and the first cooling water channel 301 is provided in the shaft wall of the second section.

[0080] The conductive component 80 can be a high-voltage connector, which is used to connect to the motor controller. The high-voltage connector is fixed to the shaft wall by fixing bolts, such as Fig.14 As shown, the end of the high-voltage connector close to the stator core 202 is a connection terminal 801, and a through hole 2013 is provided at the position of the shaft wall corresponding to the connection terminal 801. The through hole 2013 communicates the radial inner side and the radial outer side of the shaft wall. The connection terminal 801 is connected to the lead wire 2032 of the stator winding 203 through the conductive component 802 penetrating the through hole 2013 to supply power to the stator winding 203. By providing the second cooling water channel 302 to exchange heat with the conductive component 80, the operating temperature of the conductive component 80 can be kept within a suitable range, which is conducive to making the linear motor 100 have a better working efficiency.

[0081] In some embodiments of the present invention, reference may be made to Figure 2 , Figures 7 to 11As shown, in the axial direction of the stator core shaft 201, the second cooling water channel 302 is connected to the first cooling water channel 301; one end of the second cooling water channel 302 is a liquid inlet 2012 or a liquid outlet 2015 (such as Figure 1 Specifically, the second cooling water channel 302 may be provided with two, one of which is an inlet channel and the other is an outlet channel, one end of the inlet channel is a liquid inlet 2012, and one end of the outlet channel is a liquid outlet 2015, cooling water may be introduced into the inlet channel through the liquid inlet 2012, and the cooling water in the outlet channel may be discharged from the liquid outlet 2015. The first cooling water channel 301 and the second cooling water channel 302 are interconnected, and the cooling water in the second cooling water channel 302 may enter the first cooling water channel 301 to exchange heat with the stator core 202.

[0082] More specifically, the water inlet and outlet channels can both extend in the axial direction to facilitate processing and forming. At least one of the liquid inlet 2012 and the liquid outlet 2015 is formed on an end surface of the stator core shaft 201. The inner peripheral wall of the shaft wall can be provided with a convex portion, and the second cooling water channel 302 is at least partially formed in the convex portion, so that the cross section of the second cooling water channel 302 is larger, reducing the flow resistance of the coolant and the pressure at the liquid inlet 2012.

[0083] In some embodiments, Fig.13 and Fig.14 As shown, a water pipe base 2014 is fixed to the axial first end of the shaft wall. For example, the water pipe base 2014 can be fixed to the shaft wall by a plurality of bolts. The water pipe base 2014 is used to fix the end of the coolant supply pipeline. The water pipe base 2014 is connected with the liquid inlet 2012 and the liquid outlet 2015. In order to ensure the sealing between the water pipe base 2014 and the shaft wall, a sealing gasket can be provided between the water pipe base 2014 and the shaft wall.

[0084] In some embodiments of the present invention, Figure 2 and Figures 8 to 11 As shown, in the radial direction of the stator core shaft 201, the second cooling water channel 302 is arranged closer to the outer peripheral wall of the stator core shaft 201 than the first cooling water channel 301. In this way, the volume of the cavity in the middle of the part of the stator core shaft 201 where the second cooling water channel 302 is arranged can be as large as possible to accommodate and install the conductive component 80, and at the same time, the cross-sectional area of ​​the second cooling water channel 302 is also large, and the flow resistance of the coolant is small.

[0085] In some embodiments, Figure 3As shown, a guide channel 303 is provided between the first cooling water channel 301 and the second cooling water channel 302, and the core shaft wall thickness at the guide channel 303 is greater than the core shaft wall thickness at the position where the first cooling water channel 301 is connected to the guide channel 303. It can be understood that at the guide channel 303, the flow direction of the coolant will change, so the coolant at this position has a stronger impact on the wall surface of the guide channel 303, while at the position where the first cooling water channel 301 is connected to the guide channel 303, the coolant has a smaller impact on the first cooling water channel 301, therefore, the wall thickness of the stator core shaft 201 at the guide channel 303 is greater than the wall thickness of the stator core shaft 201 at the position where the first cooling water channel 301 is connected to the guide channel 303, so that the stator core shaft 201 corresponding to the guide channel 303 is not easily worn to cause coolant leakage, which is conducive to making the stator core shaft 201 have a longer service life.

[0086] In some embodiments of the present invention, there are multiple first cooling water channels 301 arranged circumferentially on the stator core shaft 201 , so as to dissipate heat from the stator core 202 more evenly and quickly.

[0087] In some embodiments, at least two first cooling water channels 301 are connected to the same second cooling water channel 302 , so that the number of second cooling water channels 302 can be reduced, which facilitates processing.

[0088] It can be understood that the sum of the cross-sectional areas of at least two first cooling water channels 301 is greater than the cross-sectional area of ​​the same second cooling water channel 302 connected thereto, that is, after the coolant enters the first cooling water channel 301, the flow area of ​​the coolant is larger. In this way, the flow resistance of the coolant entering the first cooling water channel 301 is smaller, the heat exchange area is large and the flow speed is slowed down, which is conducive to more sufficient heat exchange between the coolant and the stator core 202, ensuring the cooling effect, and at the same time reducing the pressure at the liquid inlet 2012, reducing the possibility of significant deformation of the stator core shaft 201.

[0089] In some embodiments of the present invention, reference may be made to Figure 1 , Figure 4 , Figure 5As shown, there are two second cooling water channels 302, one of which is an inlet channel and the other is an outlet channel, at least two first cooling water channels 301 connected to the inlet channel are the first group of first cooling water channels 301, at least two first cooling water channels 301 connected to the outlet channel are the second group of first cooling water channels 301, and the positioning groove 2011 is arranged between the first group of first cooling water channels 301 and the second group of first cooling water channels 301. That is, in the circumferential direction of the stator core shaft 201, the first cooling water channels 301 and the positioning groove 2011 are arranged at intervals. In this way, the positioning groove 2011 will not occupy the wall thickness of the first cooling water channel 301, the wall thickness of each part of the first cooling water channel 301 is relatively uniform, easy to cast, and the side wall of the first cooling water channel 301 is not easy to break. Correspondingly, the overall structural strength of the stator core shaft 201 is also higher, and the positioning groove 2011 has a better limiting effect on the stator core 202. On the premise that the wall thickness of the first cooling water channel 301 meets the use requirements, the cross-sectional area of ​​the first cooling water channel 301 can be as large as possible to increase the heat exchange area, reduce the flow resistance, and improve the cooling effect.

[0090] In some embodiments, Figure 4 and Figure 5 As shown, a reinforcing rib 304 is provided between two adjacent first cooling channels 301 of the same group. The reinforcing rib 304 can reinforce the side wall of the first cooling channel 301 to reduce the possibility of deformation of the circumferential side wall of the first cooling channel 301, that is, reduce the possibility of deformation of the stator core shaft 201.

[0091] According to some embodiments of the present invention, Figure 2 , Figure 6 , Figures 8 to 11 As shown, a third cooling water channel 305 is provided in the shaft wall. The third cooling water channel 305 is provided at one end of the shaft wall close to the first cooling water channel 301 and away from the second cooling water channel 302. The third cooling water channel 305 is connected to at least two first cooling water channels 301 and is used to connect the two second cooling water channels 302 to form a coolant flow loop.

[0092] In some embodiments of the present invention, Fig.13 and Fig.14The stator core 202 includes a plurality of stator blocks 2022 stacked and arranged along the axial direction of the stator core axis 201, and stator slots 2023 are arranged between adjacent stator blocks 2022; the stator assembly 20 also includes a stator winding 203, and the stator winding 203 includes a plurality of coil disks 2031, and the coil disks 2031 are arranged in the stator slots 2023. In this way, the stator blocks 2022 and the coil disks 2031 can be produced as a unit, and then the plurality of stator blocks 2022 and the coil disks 2031 are assembled together to form an excitation module, so that the processing is more convenient, which is conducive to reducing the production cost of the stator assembly 20, and the coil disks 2031 are located in the stator slots 2023, and the position of the coil disks 2031 is not easy to change, so that the long-term use performance of the stator assembly 20 is more stable.

[0093] More specifically, for example, the stator block 2022 is formed with an open slot only on one axial side, and the open slot and the other side wall of the adjacent stator block 2022 together define the stator slot 2023; or, the stator block 2022 is formed with open slots on both axial sides, and the opposite open slots of adjacent stator blocks 2022 together form the stator slot 2023.

[0094] In some embodiments, Fig.13 and Fig.15 As shown, the stator assembly 20 further includes a fixing member 204, which is fixedly connected to one end of the stator core shaft 201 to axially fix the plurality of stator blocks 2022, and can ensure that the plurality of stator blocks 2022 are reliably fixed on the stator core shaft 201, and prevent the stator core 202 from falling off the stator core shaft 201, thereby ensuring the working safety of the linear motor 100. For example, the fixing member 204 may be an annular fixing member, and the inner peripheral wall of the annular fixing member is threadedly connected or welded to the outer peripheral wall of the stator core shaft 201.

[0095] The linear motor 100 according to the embodiment of the utility model includes the stator assembly 20 according to the embodiment of the utility model. Since the stator assembly 20 according to the embodiment of the utility model has the above-mentioned beneficial technical effects, the linear motor 100 according to the embodiment of the utility model is arranged so that the first cooling water channel 301 and the positioning groove 2011 are arranged at intervals in the circumferential direction of the stator core shaft 201, so that the positioning groove 2011 does not occupy the wall thickness of the first cooling water channel 301. On the one hand, the wall thickness of each part of the first cooling water channel 301 can be made more uniform, easy to cast, and the side wall of the first cooling water channel 301 is not easy to break. Correspondingly, the overall structural strength of the stator core shaft 201 is also higher, and the positioning groove 2011 has a better limiting effect on the stator core 202; on the other hand, under the premise that the wall thickness of the first cooling water channel 301 meets the use requirements, the cross-sectional area of ​​the first cooling water channel 301 can be as large as possible to increase the heat exchange area, reduce the flow resistance, and improve the cooling effect.

[0096] In some embodiments, the linear motor 100 further includes a mover assembly 10, and the mover assembly 10 includes a housing 101. Fig.13 and Fig.14 As shown, one axial end (for example, the upper end shown in the figure) of the housing 101 is open to form an open hole, and a portion of the stator assembly 20 is passed through the open hole, so that a portion of the stator assembly 20 can be located in the housing 101 through the open hole, thereby realizing the movement requirements between the mover assembly 10 and the stator assembly 20.

[0097] A seal 50 is provided between the hole wall of the open hole and the outer peripheral wall of the stator assembly 20. The seal 50 can achieve the sealing requirement between the hole wall of the open hole and the outer peripheral wall of the stator assembly 20, effectively preventing external impurities (such as dust, moisture, etc.) from entering the interior of the linear motor 100 through the open hole, thereby protecting the internal structure of the linear motor 100, effectively reducing the possibility of water vapor condensation adhering to the charged body, causing the stator winding 203 to short-circuit and burn out, and dust adhering to the outer circle of the stator core shaft 201, scratching the inner wall of the bearing, causing abnormal wear and failure of the bearing, which is beneficial to extend the service life of the linear motor 100. For example, the seal 50 can be an oil seal, and the seal 50 is provided on the housing 101 and moves with the housing 101.

[0098] In some embodiments of the present invention, Fig.13 , Fig.14 , Fig.16 As shown, a second sliding bearing 42 is further provided between the hole wall of the open hole and the outer peripheral wall of the stator assembly 20. The second sliding bearing 42 can reduce the friction between the stator assembly 20 and the mover assembly 10, effectively reduce energy loss, help reduce the degree of wear, and extend the service life of the linear motor 100. The second sliding bearing 42 is located on the side of the seal 50 close to the first cooling water channel 301 (for example, the lower side shown in the figure), so that the seal 50 can block external impurities from entering the second sliding bearing 42 through the open hole, avoid problems such as wear on the second sliding bearing 42, and help extend the service life.

[0099] In some embodiments, the second sliding bearing 42 can be integrally formed, which is convenient for processing and manufacturing the second sliding bearing 42, and is conducive to reducing production costs. For example, the second sliding bearing 42 can be formed by powder metallurgy sintering and pressing, and the second sliding bearing 42 is provided with air holes, and grease is filled into the air holes by high pressure, and the grease can achieve lubrication between the stator assembly 20 and the mover assembly 10 when they move relative to each other, so that the stator assembly 20 and the mover assembly 10 move relative to each other more smoothly, effectively reducing friction.

[0100] In some embodiments, the second sliding bearing 42 is clearance-fitted with the stator core shaft 201 , and the outer peripheral wall of the second sliding bearing 42 and the hole wall of the open hole are interference-fitted, ensuring that the second sliding bearing 42 is reliably fixed on the stator assembly 20 .

[0101] In some embodiments, Fig.13 As shown, a lower fork arm 70 is provided on the housing 101, and the lower fork arm 70 is used to connect with the wheel, which can meet the required connection requirements. The mover assembly 10 includes a guide rod 102 that is slidably matched with the stator core shaft 201, and the guide rod 102 is fixed to the housing 101 through a disc.

[0102] In some embodiments, Figure 7 As shown, the mover assembly 10 includes a guide rod 102 that slides with the second chamber 2021. A first sliding bearing 41 is provided between the guide rod 102 and the inner wall of the second chamber 2021. The first sliding bearing 41 can reduce the friction between the guide rod 102 and the stator core shaft 201, effectively reducing energy loss, which is beneficial to reducing the degree of wear and extending the service life of the linear motor 100.

[0103] In some embodiments, reference may be made to Figures 17 to 20 As shown, the outer peripheral wall of the stator core shaft 201 is provided with a mounting hole, and the mounting hole is used to install the magnetic position sensor 60. Correspondingly, the mover assembly 10 includes a housing 101, and the housing 101 is installed with a corresponding number of sensor reading heads, and the sensor reading heads are used to read the waveform generated by the magnetic position sensor 60. According to the change of the waveform generated by the magnetic position sensor 60, the relative position relationship between the stator core shaft 201 and the housing 101 can be determined. When the linear motor 100 is applied to a vehicle, the relative displacement between the vehicle body and the wheel can be determined according to the relative position relationship between the stator core shaft 201 and the housing 101.

[0104] More specifically, during installation, the magnetic position sensor 60 can be pressed into the installation hole and fixed by a rubber plug. An outer sleeve 70 is sleeved on the circumferential outer side of the stator core shaft 201 to separate the magnetic position sensor 60 from the movable subassembly 10, so as to prevent the movable subassembly 10 from rubbing against the surface of the magnetic position sensor 60 when moving.

[0105] The suspension system according to the embodiment of the utility model includes the linear motor 100 according to the embodiment of the utility model. Since the linear motor 100 according to the embodiment of the utility model has the above-mentioned beneficial technical effects, the suspension system according to the embodiment of the utility model is arranged so that the first cooling water channel 301 and the positioning groove 2011 are arranged at intervals in the circumferential direction of the stator core shaft 201, so that the positioning groove 2011 does not occupy the wall thickness of the first cooling water channel 301. On the one hand, the wall thickness of each part of the first cooling water channel 301 can be made more uniform, easy to cast, and the side wall of the first cooling water channel 301 is not easy to break. Correspondingly, the overall structural strength of the stator core shaft 201 is also higher, and the positioning groove 2011 has a better limiting effect on the stator core 202; on the other hand, under the premise that the wall thickness of the first cooling water channel 301 meets the use requirements, the cross-sectional area of ​​the first cooling water channel 301 can be as large as possible to increase the heat exchange area, reduce the flow resistance, and improve the cooling effect.

[0106] The vehicle according to the embodiment of the utility model includes the suspension system according to the embodiment of the utility model. Since the suspension system according to the embodiment of the utility model has the above-mentioned beneficial technical effects, the vehicle according to the embodiment of the utility model is arranged so that the first cooling water channel 301 and the positioning groove 2011 are arranged at intervals in the circumferential direction of the stator core shaft 201, so that the positioning groove 2011 does not occupy the wall thickness of the first cooling water channel 301. On the one hand, the wall thickness of each part of the first cooling water channel 301 can be made more uniform, easy to cast, and the side wall of the first cooling water channel 301 is not easy to break. Correspondingly, the overall structural strength of the stator core shaft 201 is also higher, and the positioning groove 2011 has a better limiting effect on the stator core 202; on the other hand, under the premise that the wall thickness of the first cooling water channel 301 meets the use requirements, the cross-sectional area of ​​the first cooling water channel 301 can be as large as possible to increase the heat exchange area, reduce the flow resistance, and improve the cooling effect.

[0107] In some embodiments, when the linear motor 100 is applied to a vehicle, the stator assembly 20 can be connected to the body of the vehicle, and the mover assembly 10 can be connected to the wheel of the vehicle. For example, the linear motor 100 is placed vertically, the upper end of the stator assembly 20 is connected to the body, and the lower end of the mover assembly 10 is connected to the wheel. This can meet the installation requirements of the linear motor 100 and ensure that the linear motor 100 is reliably installed on the vehicle. The mover assembly 10 can perform up and down reciprocating linear motion with the stator assembly 20 to meet the required usage requirements.

[0108] The linear motor 100, the suspension system and other components and operations of the vehicle according to the embodiment of the present invention are well known to those skilled in the art and will not be described in detail here.

[0109] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means 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 utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0110] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A stator assembly, characterized in that: include: A stator core shaft (201), the stator core shaft (201) comprising a shaft wall, a first cooling water channel (301) being provided in the shaft wall, a positioning groove (2011) being provided on the outer peripheral wall of the stator core shaft (201), and the first cooling water channel (301) and the positioning groove (2011) being arranged at intervals in the circumferential direction of the stator core shaft (201); A stator core (202), the stator core (202) being sheathed on the stator core shaft (201), the first cooling water channel (301) being in heat exchange with the stator core (202), the inner peripheral wall of the stator core (202) being provided with a positioning protrusion (2021), and the positioning protrusion (2021) being located in the positioning groove (2011).

2. The stator assembly according to claim 1, characterized in that: The radial wall thickness (L1) of the portion of the shaft wall where the positioning groove (2011) is provided is greater than the radial width (L2) of the first cooling water channel (301).

3. The stator assembly according to claim 1, characterized in that: The first cooling water channel (301) comprises a first liquid inlet channel (3011) and a first liquid outlet channel (3012) which are connected to each other; the first liquid inlet channel (3011) comprises at least two and / or the first liquid outlet channel (3012) comprises at least two; a first rib (3041) is provided between two adjacent first liquid inlet channels (3011) and / or between two adjacent first liquid outlet channels (3012); a second rib (3042) is provided between adjacent first liquid inlet channels (3011) and first liquid outlet channels (3012); in the circumferential direction of the stator core shaft (201), the size of the second rib (3042) is larger than the size of the first rib (3041); and the positioning groove (2011) is provided on the outer wall of the second rib (3042).

4. The stator assembly according to claim 3, characterized in that: In the radial direction of the stator core shaft (201), the radial thickness (L3) of the first rib (3041) is smaller than the radial wall thickness (L1) of a portion of the second rib (3042) where the positioning groove (2011) is provided.

5. The stator assembly according to claim 1, characterized in that: It also includes a conductive component (80) and a second cooling water channel (302), wherein the second cooling water channel (302) is arranged in the shaft wall, the shaft wall surrounds a containing chamber, and the conductive component (80) is arranged in the containing chamber and performs heat exchange with the second cooling water channel (302).

6. The stator assembly according to claim 5, characterized in that In the axial direction of the stator core shaft (201), the second cooling water channel (302) is connected to the first cooling water channel (301), and one end of the second cooling water channel (302) is a liquid inlet (2012) or a liquid outlet (2015).

7. The stator assembly according to claim 6, characterized in that In the radial direction of the stator core shaft (201), the second cooling water channel (302) is arranged closer to the outer peripheral wall of the stator core shaft (201) than the first cooling water channel (301), and a guide channel (303) is provided between the first cooling water channel (301) and the second cooling water channel (302), and the core shaft wall thickness at the guide channel (303) is greater than the core shaft wall thickness at the position where the first cooling water channel (301) and the guide channel (303) are connected.

8. The stator assembly according to claim 6, characterized in that On the circumference of the stator core shaft (201), there are multiple first cooling water channels (301) arranged along the circumference, at least two of the first cooling water channels (301) are connected to the same second cooling water channel (302), and the sum of the cross-sectional areas of the at least two first cooling water channels (301) is greater than the cross-sectional area of ​​the same second cooling water channel (302) connected thereto.

9. The stator assembly according to any one of claims 1 to 8, characterized in that: The stator core (202) comprises a plurality of stator blocks (2022) stacked and arranged axially along the stator core axis (201), and stator slots (2023) are provided between adjacent stator blocks (2022); The stator assembly (20) further comprises a stator winding (203), wherein the stator winding (203) comprises a plurality of coil disks (2031), and the coil disks (2031) are arranged in the stator slots (2023).

10. A linear motor, characterized in that: It comprises a stator assembly (20) according to any one of claims 1-9.

11. A suspension system, characterized in that: It comprises the linear motor (100) according to claim 10.

12. A vehicle, characterized in that: Comprising a suspension system according to claim 11.

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