Stator tooth module and motor structure

Abstract

The utility model provides a stator tooth module and a motor structure, the stator tooth module comprises a plurality of stator tooth dies, and the plurality of stator tooth dies are uniformly arranged at intervals along the circumferential direction of a motor shaft; each stator tooth die comprises a tooth die main body and two tooth die end blocks, and two ends of the tooth die main body are respectively connected with the two tooth die end blocks. According to the utility model, the stator tooth module is modularly designed, and compared with the existing stator tooth module, a tooth yoke part is omitted, the loss of the tooth yoke part and the saturation of a magnetic circuit are reduced, and the slot fullness rate and the assembly efficiency are improved. Each stator tooth mold comprises a tooth mold main body and two tooth mold end blocks, and during installation, two ends of the tooth mold main body are respectively connected with the two tooth mold end blocks to form an I-shaped structure, so that convenience is provided for winding a stator winding (such as a copper wire).

Description

Technical Field

[0001] The utility model relates to the technical field of stator tooth modules, in particular to a stator tooth module and a motor structure. Background Art

[0002] The stator tooth module is an important component of the motor structure. It is used to fix the magnetic field in the motor structure and interact with the rotor to generate electromagnetic torque to drive the motor shaft to rotate. Its design, manufacturing and performance have an important impact on the overall performance of the motor.

[0003] The existing stator tooth module is mainly formed by integrally forming the stator teeth and the tooth yoke. Two adjacent stators and the tooth yoke form a wire slot. The stator winding is wound on the stator teeth, specifically in the wire slot. This will result in poor slot fill rate and assembly efficiency. Summary of the Invention

[0004] The utility model provides a stator tooth module and a motor structure, so as to solve the problems of poor slot filling rate and poor assembly efficiency of the existing stator tooth module.

[0005] A stator tooth die set comprises a plurality of stator tooth dies, wherein the plurality of stator tooth dies are arranged evenly spaced along the circumferential direction of a motor shaft;

[0006] Each of the stator tooth molds includes a tooth mold body and two tooth mold end blocks, and two ends of the tooth mold body are respectively connected to the two tooth mold end blocks.

[0007] Preferably, the two side surfaces of the tooth die end block arranged along the circumferential direction of the motor shaft are both arc-shaped surfaces, and the length of the inner arc-shaped surface along the circumferential direction of the motor shaft is shorter than the length of the outer arc-shaped surface along the circumferential direction of the motor shaft;

[0008] The intersection of the extended lines of the two side surfaces of the tooth die end block arranged along the radial direction of the tooth die main body coincides with the axis center of the motor shaft.

[0009] A motor structure comprises a motor shaft, a stator winding and the stator tooth module assembly;

[0010] The stator tooth mold assembly is mounted on the motor shaft, and the stator winding is wound on a plurality of the tooth mold bodies.

[0011] Preferably, the motor structure further includes a plurality of cooling modules, each of which is arranged between two adjacent stator tooth dies.

[0012] Preferably, the cooling module includes a cooling body; a first cooling channel arranged along the axial direction of the cooling body is provided in the cooling body, and both ends of the cooling body are provided with guide pipes connected to the first cooling channel.

[0013] Preferably, the motor structure further includes two cooling end covers, both of which are sleeved on the motor shaft, and the two cooling end covers are respectively located at both ends of the cooling module, and each of the cooling end covers is connected to the cooling module.

[0014] Preferably, a plurality of second cooling channels are provided in each of the cooling end covers, and both ends of each of the second cooling channels are respectively connected to the same end of the two cooling modules;

[0015] The plurality of second cooling channels in the two cooling end covers are staggered along the axial direction of the motor shaft and cooperate with the plurality of cooling modules to form a cooling circulation channel;

[0016] The cooling end cover further includes a liquid inlet channel and a liquid outlet channel connected to the cooling circulation channel. The liquid inlet channel and the liquid outlet channel are arranged on the same cooling end cover, or the liquid inlet channel and the liquid outlet channel are respectively arranged on two cooling end covers.

[0017] Preferably, the motor structure further includes a liquid inlet pipe and a liquid outlet pipe, the liquid inlet pipe is communicated with the liquid inlet channel, and the liquid outlet pipe is communicated with the liquid outlet channel.

[0018] Preferably, the motor structure further includes a motor housing, and the motor shaft, the stator tooth module, the cooling module and the two cooling end covers are all arranged in the motor housing.

[0019] Preferably, the motor structure further includes a motor cover, which is sleeved on the motor shaft and connected to the motor housing.

[0020] The stator tooth die assembly provided in this embodiment includes multiple stator tooth dies, evenly spaced along the circumference of the motor shaft. This modular design eliminates the tooth yoke compared to existing stator tooth die assemblies, reducing yoke losses and magnetic circuit saturation, improving slot fill rate and assembly efficiency. Each stator tooth die comprises a tooth die body and two tooth die end blocks. During installation, the ends of the tooth die body are connected to the two tooth die end blocks, forming an I-shaped structure. This arrangement facilitates winding stator windings (e.g., copper wire). BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0022] Figure 1 This is an exploded view of the motor structure in one embodiment of the present utility model;

[0023] Figure 2 This is an isometric view of a stator tooth die in one embodiment of the present utility model;

[0024] Figure 3 This is a cross-sectional view of a cooling module in one embodiment of the present invention;

[0025] Figure 4 This is an isometric view of a first structure of a cooling end cover in one embodiment of the present invention;

[0026] Figure 5 This is an isometric view of a second structure of the cooling end cover in one embodiment of the present invention;

[0027] Figure 6 Schematic diagram of the cooling circuit of the motor structure in one embodiment of the present invention.

[0028] Among them, 1. stator tooth mold; 11. tooth mold body; 12. tooth mold end block; 2. motor shaft; 3. stator winding; 4. cooling module; 41. cooling body; 42. first cooling channel; 43. guide tube; 5. cooling end cover; 51. second cooling channel; 52. liquid inlet channel; 53. liquid outlet channel; 6. liquid inlet pipe; 7. liquid outlet pipe; 8. motor housing; 9. motor cover; 10. mounting hole. DETAILED DESCRIPTION

[0029] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0030] In the description of the present invention, it should be understood that the terms "longitudinal," "radial," "length," "width," "thickness," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0031] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0032] The present invention provides a stator tooth die set, referring to Figure 1 and Figure 2 The stator tooth mold group includes a plurality of stator tooth molds 1, which are used to be evenly spaced along the circumferential direction of the motor shaft 2; each stator tooth mold 1 includes a tooth mold body 11 and two tooth mold end blocks 12, and the two ends of the tooth mold body 11 are respectively connected to the two tooth mold end blocks 12.

[0033] As an example, the stator tooth die assembly is a critical component of the motor structure, used to define the magnetic field within the motor structure and interact with the rotor to generate electromagnetic torque to drive the motor shaft 2 in rotation. Specifically, it comprises multiple stator tooth dies 1, evenly spaced along the circumference of the motor shaft 2. This arrangement provides a modular design for the stator tooth die assembly. Compared to existing stator tooth die assemblies, the tooth yoke is eliminated, reducing yoke losses and magnetic circuit saturation, improving slot fill rate and assembly efficiency. Each stator tooth die 1 comprises a tooth die body 11 and two tooth die end blocks 12. During installation, the ends of the tooth die body 11 are connected to the two tooth die end blocks 12, forming an I-shaped structure. This arrangement facilitates winding the stator winding 3 (e.g., copper wire). The stator tooth dies 1 are made of silicon steel.

[0034] In one embodiment, referring to Figure 2 The two side surfaces of the tooth mold end block 12 set along the circumferential direction of the motor shaft 2 are both arc-shaped surfaces, and the length of the inner arc-shaped surface along the circumferential direction of the motor shaft 2 is smaller than the length of the outer arc-shaped surface along the circumferential direction of the motor shaft 2; the intersection of the extension lines of the two side surfaces of the tooth mold end block 12 set along the radial direction of the tooth mold main body 11 coincides with the axis center of the motor shaft 2.

[0035] As an example, the two side surfaces of the tooth mold end block 12 arranged along the circumferential direction of the motor shaft 2 are both arc-shaped surfaces, the two arc-shaped surfaces are parallel along the radial direction of the motor shaft 2, and the length of the inner arc-shaped surface along the circumferential direction of the motor shaft 2 is smaller than the length of the outer arc-shaped surface along the circumferential direction of the motor shaft 2; the intersection of the extension lines of the two side surfaces of the tooth mold end block 12 arranged along the radial direction of the tooth mold main body 11 coincides with the axis of the motor shaft 2. This arrangement allows multiple stator teeth to be evenly spaced along the circumferential direction of the motor shaft 2. The stator tooth mold group is modularly designed. Compared with the existing stator tooth mold group, the tooth yoke part is eliminated, the magnetic circuit saturation and loss of the tooth yoke part are reduced, and the slot fill rate and assembly efficiency are improved.

[0036] The present invention provides a motor structure. Figure 1-6 , including a motor shaft 2, a stator winding 3 and a stator tooth mold group; the stator tooth mold group is mounted on the motor shaft 2, and the stator winding 3 is wound on multiple tooth mold bodies 11.

[0037] As an example, the motor structure includes a motor shaft 2, a stator winding 3, and a stator tooth die set. The motor shaft 2 is mainly cylindrical in shape and serves as the power output carrier of the motor structure. During installation, the stator tooth die set is mounted on the motor shaft 2, and the stator winding 3 is wound on multiple tooth die bodies 11, which are used to define the magnetic field in the motor structure and interact with the rotor, thereby generating electromagnetic torque to drive the motor shaft 2 to rotate. The stator tooth die set includes multiple stator tooth dies 1, which are used to be evenly spaced along the circumferential direction of the motor shaft 2. This arrangement allows the stator tooth die set to be modularly designed. Compared with the existing stator tooth die set, the tooth yoke part is eliminated, reducing the tooth yoke part loss and magnetic circuit saturation, improving the slot fill rate and assembly efficiency, and thus improving the power density of the motor structure. Each stator tooth die 1 includes a tooth die body 11 and two tooth die end blocks 12. During installation, the two ends of the tooth die body 11 are respectively connected to the two tooth die end blocks 12 to form an I-shaped structure. This arrangement facilitates winding the stator winding 3 (such as copper wire).

[0038] In one embodiment, referring to Figure 1 and Figure 6 The motor structure further includes a plurality of cooling modules 4 , each cooling module 4 being arranged between two adjacent stator tooth dies 1 .

[0039] As an example, during operation of the motor structure, the stator windings 3 wound around the multiple stator tooth dies 1 generate heat. If this heat cannot be dissipated promptly, the motor structure will overheat, thereby affecting its normal operation. The motor structure also includes multiple cooling modules 4, each of which is positioned between two adjacent stator tooth dies 1. This arrangement allows the cooling modules 4 to remove heat generated by the stator windings 3, ensuring that the operating temperature of the motor structure remains within a reasonable range. Furthermore, the cooling modules 4 are modularized to match the stator tooth dies 1, increasing their contact area with the stator windings 3 and facilitating installation and removal.

[0040] In one embodiment, referring to Figure 1 and Figure 3 The cooling module 4 includes a cooling body 41 ; a first cooling channel 42 is provided in the cooling body 41 along the axial direction of the cooling body 41 , and both ends of the cooling body 41 are provided with a guide pipe 43 connected to the first cooling channel 42 .

[0041] The axial direction of the cooling body 41 is the same as the axial direction of the motor shaft 2 .

[0042] As an example, the cooling module 4 includes a cooling body 41; when designed, the cooling body 41 is in the shape of a rectangular parallelepiped, with its two sides closely attached to the stator tooth die 1 and the stator winding 3. A first cooling channel 42 is provided in the cooling body 41 along the axial direction of the cooling body 41, and a guide tube 43 is provided at both ends of the cooling body 41 to communicate with the first cooling channel 42; with this arrangement, the coolant flows from the guide tube 43 at one end of the cooling body 41 into the first cooling channel 42, and finally flows out of the guide tube 43 at the other end of the cooling body 41. The coolant flows in the first cooling channel 42, which can absorb and carry away the heat generated by the stator winding 3, greatly improving the heat dissipation efficiency, thereby ensuring that the operating temperature of the motor structure remains within a reasonable range.

[0043] In one embodiment, referring to Figure 1 、 Figure 4 、 Figure 5 and Figure 6 The motor structure also includes two cooling end covers 5 , which are both mounted on the motor shaft 2 . The two cooling end covers 5 are respectively located at both ends of the cooling module 4 , and each cooling end cover 5 is connected to the cooling module 4 .

[0044] As an example, the motor structure also includes two cooling end caps 5. During installation, the two cooling end caps 5 are both mounted on the motor shaft 2. The two cooling end caps 5 are respectively located at the two ends of the cooling module 4, and each cooling end cap 5 is connected to the cooling module 4. In this arrangement, the two cooling end caps 5 cooperate with the cooling module 4 to form a complete cooling circuit. The coolant enters from the first cooling end cap 5, passes through the cooling module 4 and enters the second cooling end cap 5, refluxes in the second cooling end cap 5, and then passes through the cooling module 4 and enters the first cooling end cap 5. This can absorb and carry away the heat generated by the stator winding 3, greatly improving the heat dissipation efficiency, thereby ensuring that the operating temperature of the motor structure remains within a reasonable range. Among them, each cooling end cap 5 is provided with a plurality of mounting holes 10 on one end face close to the cooling module 4. The plurality of mounting holes 10 are arranged along the circumferential direction of the motor shaft 2, and the two ends of each guide tube 43 are respectively installed in the mounting holes 10 of the two cooling end caps 5.

[0045] In one embodiment, referring to Figure 4 、 Figure 5 and Figure 6 Each cooling end cover 5 is provided with a plurality of second cooling channels 51, and the two ends of each second cooling channel 51 are respectively connected to the same end of the two cooling modules 4; the plurality of second cooling channels 51 in the two cooling end covers 5 are staggered along the axial direction of the motor shaft 2, and cooperate with the plurality of cooling modules 4 to form a cooling circulation channel; the cooling end cover 5 also includes a liquid inlet channel 52 and a liquid outlet channel 53 connected to the cooling circulation channel, and the liquid inlet channel 52 and the liquid outlet channel 53 are arranged on the same cooling end cover 5, or the liquid inlet channel 52 and the liquid outlet channel 53 are respectively arranged on the two cooling end covers 5.

[0046] As an example, during the design, the cooling end cover 5 is cylindrical in shape, hollow in structure, and has a flow channel inside, which is used to ensure that the coolant circulates throughout the entire cycle. Each cooling end cover 5 is provided with multiple second cooling channels 51, and the two ends of each second cooling channel 51 are respectively connected to the same end of the two cooling modules 4. Specifically, the two ends of each second cooling channel 51 are respectively connected to two adjacent mounting holes 10, and the two mounting holes 10 are respectively used to mount the same end of the two cooling modules 4; the multiple second cooling channels 51 in the two cooling end covers 5 are staggered along the axial direction of the motor shaft 2, and cooperate with the multiple cooling modules 4 to form a cooling circulation channel; in this arrangement, the coolant flows from the first cooling end cover 5 through a second cooling channel 51 into the first cooling channel 4 of the first cooling module 4 2, then flows into a second cooling channel 51 of the second cooling end cover 5, then flows from the second cooling channel 51 of the second cooling end cover 5 to the first cooling channel 42 of the second cooling module 4, then flows into another second cooling channel 51 of the first cooling end cover 5, and then flows from the second cooling channel 51 into the first cooling channel 42 of the third cooling module 4, and circulates through the entire cooling circulation channel and finally flows out from the first cooling end cover 5, which can absorb and take away the heat generated by the stator winding 3, greatly improving the heat dissipation efficiency, thereby ensuring that the operating temperature of the motor structure is maintained within a reasonable range.

[0047] In addition, the cooling end cover 5 further includes a liquid inlet channel 52 and a liquid outlet channel 53 connected to the cooling circulation channel. The liquid inlet channel 52 and the liquid outlet channel 53 have two arrangement structures;

[0048] The first method is to set the liquid inlet channel 52 and the liquid outlet channel 53 on the same cooling end cover 5. At this time, the coolant flows from the liquid inlet channel 52 into the first cooling end cover 5 through a second cooling channel 51 and into the first cooling channel 42 of the first cooling module 4, and then flows into a second cooling channel 51 of the second cooling end cover 5, and then flows from the second cooling channel 51 of the second cooling end cover 5 to the first cooling channel 42 of the second cooling module 4, and then flows into another second cooling channel 51 of the first cooling end cover 5, and then flows from the second cooling channel 51 into the first cooling channel 42 of the third cooling module 4, and circulates through the entire cooling circulation channel, and finally flows out of the first cooling end cover 5 through the liquid outlet channel 53; in this way, the coolant enters and exits from the same cooling end cover 5, and can absorb and take away the heat generated by the stator winding 3, thereby greatly improving the heat dissipation efficiency.

[0049] The second method is to respectively set the liquid inlet channel 52 and the liquid outlet channel 53 on the two cooling end covers 5. At this time, the coolant flows from the liquid inlet channel 52 into the first cooling end cover 5 through a second cooling channel 51 and into the first cooling channel 42 of the first cooling module 4, and then flows into a second cooling channel 51 of the second cooling end cover 5, and then flows from the second cooling channel 51 of the second cooling end cover 5 to the first cooling channel 42 of the second cooling module 4, and then flows into another second cooling channel 51 of the first cooling end cover 5, and then flows from the second cooling channel 51 into the first cooling channel 42 of the third cooling module 4, and circulates through the entire cooling circulation channel, and finally flows out of the second cooling end cover 5 through the liquid outlet channel 53. In this way, the coolant enters and exits from different cooling end covers 5, and can absorb and take away the heat generated by the stator winding 3, thereby greatly improving the heat dissipation efficiency.

[0050] In one embodiment, referring to Figure 4 、 Figure 5 and Figure 6 The motor structure also includes a liquid inlet pipe 6 and a liquid outlet pipe 7 connected to the cooling circulation channel. The liquid inlet pipe 6 is connected to the liquid inlet channel 52, and the liquid outlet pipe 7 is connected to the liquid outlet channel 53.

[0051] As an example, the motor structure also includes a liquid inlet pipe 6 and a liquid outlet pipe 7 connected to the cooling circulation channel. Specifically, the liquid inlet pipe 6 and the liquid outlet pipe 7 are arranged on an end surface of the cooling end cover 5 away from the cooling module 4. The liquid inlet pipe 6 is connected to the liquid inlet channel 52, and the liquid outlet pipe 7 is connected to the liquid outlet channel 53. In this arrangement, the coolant enters from the liquid inlet pipe 6, flows from the liquid inlet channel 52 into the first cooling end cover 5, flows through a second cooling channel 51, flows into the first cooling channel 42 of the first cooling module 4, and then flows into a second cooling channel 51 of the second cooling end cover 5, and then flows out from the second cooling end cover 5. A second cooling channel 51 of the cover 5 flows to the first cooling channel 42 of the second cooling module 4, then flows into another second cooling channel 51 of the first cooling end cover 5, and then flows from the second cooling channel 51 into the first cooling channel 42 of the third cooling module 4, and circulates through the entire cooling circulation channel, and finally flows from the first cooling end cover 5 to the liquid outlet pipe 7 through the liquid outlet channel 53, and finally flows out from the liquid outlet pipe 7, which can absorb and take away the heat generated by the stator winding 3, greatly improving the heat dissipation efficiency, thereby ensuring that the operating temperature of the motor structure is maintained within a reasonable range.

[0052] In one embodiment, referring to Figure 1 The motor structure also includes a motor housing 8 , in which the motor shaft 2 , the stator tooth module, the cooling module 4 and the two cooling end covers 5 are all arranged.

[0053] As an example, the motor structure also includes a motor housing 8, which serves as a fixed carrier for other parts of the motor structure. During installation, the motor shaft 2, stator tooth module, cooling module 4 and two cooling end covers 5 are all arranged in the motor housing 8 to ensure that the motor structure assembly is more convenient and safe.

[0054] In one embodiment, referring to Figure 1 The motor structure also includes a motor cover 9, which is sleeved on the motor shaft 2 and connected to the motor housing 8.

[0055] As an example, the motor structure also includes a motor cover 9, which is cylindrical in shape. During installation, the motor cover 9 is mounted on the motor shaft 2 and connected to the motor housing 8. In this way, the motor cover 9 can fix the motor shaft 2 and form a seal with the motor housing 8, thereby providing sealing protection for the internal structure of the motor structure.

[0056] The motor structure in this embodiment can be used for vertical control of the suspension. This suspension is also called electromagnetic active suspension and is suitable for high-voltage platforms. The motor structure has the characteristics of fast response and high speed of the main drive motor, as well as the precise control of the servo motor. The whole vehicle requires four motor structures, namely the left front, left rear, right front and right rear motor structures. Due to the limitations of surrounding parts, the motor structure is small in size and is designed according to the conventional air cooling method, with low power density. The motor structure of this example, under the same volume, makes the original glue filling position of the motor structure into a liquid cooling structure, which greatly improves the heat dissipation efficiency and is of great help to the improvement of the rated power of the motor; the stator tooth mold 1 and the cooling module 4 both adopt a modular design, which meets the platform and modular design requirements, not only improves the power density of the motor structure, but also reduces costs and increases efficiency, which is of great help to improve the performance of the entire electromagnetic suspension.

[0057] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention, and should all be included in the scope of protection of the present invention.

Claims

1. A stator tooth die set, characterized in that: The stator tooth dies are arranged evenly spaced apart along the circumferential direction of the motor shaft. Each of the stator tooth molds includes a tooth mold body and two tooth mold end blocks, and two ends of the tooth mold body are respectively connected to the two tooth mold end blocks.

2. The stator tooth die assembly according to claim 1, characterized in that: The two side surfaces of the tooth die end block arranged along the circumferential direction of the motor shaft are both arc-shaped surfaces, and the length of the inner arc-shaped surface along the circumferential direction of the motor shaft is shorter than the length of the outer arc-shaped surface along the circumferential direction of the motor shaft; The intersection of the extended lines of the two side surfaces of the tooth die end block arranged along the radial direction of the tooth die main body coincides with the axis center of the motor shaft.

3. A motor structure, characterized in that: It comprises a motor shaft, a stator winding and a stator tooth module according to any one of claims 1 to 2; The stator tooth mold assembly is mounted on the motor shaft, and the stator winding is wound on a plurality of the tooth mold bodies.

4. The motor structure according to claim 3, characterized in that: The motor structure further includes a plurality of cooling modules, each of which is arranged between two adjacent stator tooth modules.

5. The motor structure according to claim 4, characterized in that: The cooling module includes a cooling body; a first cooling channel is provided in the cooling body along the axial direction of the cooling body, and both ends of the cooling body are provided with flow guide pipes connected to the first cooling channel.

6. The motor structure according to claim 4, characterized in that: The motor structure further includes two cooling end covers, both of which are sleeved on the motor shaft. The two cooling end covers are respectively located at two ends of the cooling module, and each of the cooling end covers is connected to the cooling module.

7. The motor structure according to claim 6, characterized in that: A plurality of second cooling channels are provided in each of the cooling end covers, and both ends of each of the second cooling channels are respectively connected to the same end of the two cooling modules; The plurality of second cooling channels in the two cooling end covers are staggered along the axial direction of the motor shaft and cooperate with the plurality of cooling modules to form a cooling circulation channel; The cooling end cover further includes a liquid inlet channel and a liquid outlet channel connected to the cooling circulation channel. The liquid inlet channel and the liquid outlet channel are arranged on the same cooling end cover, or the liquid inlet channel and the liquid outlet channel are respectively arranged on two cooling end covers.

8. The motor structure according to claim 7, characterized in that: The motor structure further includes a liquid inlet pipe and a liquid outlet pipe, wherein the liquid inlet pipe is communicated with the liquid inlet channel, and the liquid outlet pipe is communicated with the liquid outlet channel.

9. The motor structure according to claim 6, characterized in that: The motor structure further includes a motor housing, and the motor shaft, the stator tooth module, the cooling module and the two cooling end covers are all arranged in the motor housing.

10. The motor structure according to claim 9, characterized in that: The motor structure further comprises a motor cover, which is sleeved on the motor shaft and connected to the motor housing.

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