CN117791969A - Stator assembly, motor and robot - Google Patents

Abstract

The embodiment of the application provides a stator assembly, a motor and a robot. The stator assembly includes: the stator iron core comprises a body and a plurality of stator teeth, wherein the plurality of stator teeth are arranged on the inner wall surface of the body, the plurality of stator teeth are arranged at intervals along the circumferential direction of the body, and stator grooves are defined between two adjacent stator teeth; the stator coils are sleeved on one stator tooth, and two adjacent stator coils form a gap in the same stator groove; the heat conduction component comprises a connection part and a plurality of heat conduction fins, and the plurality of heat conduction fins are arranged on the connection part; the connecting portion is located at a first side of the stator core in the axial direction, each heat conducting fin is arranged in one gap and is in contact with the body.

Description

Stator assembly, motor and robot

Technical Field

The embodiment of the application relates to the technical field of motors, and more particularly relates to a stator assembly, a motor and a robot.

Background

With the rapid development of intelligent equipment such as robots, the requirements of the market on the performance and the structure of the servo motor are higher. Generally, an electric machine includes a stator assembly including a stator core and windings, the stator assembly generating a regular magnetic field after energizing the stator coil, and a rotor assembly including permanent magnet material, the rotor assembly being rotatable under the influence of the magnetic field generated by the stator assembly.

The frameless motor stator assembly used by the robot is usually encapsulated by epoxy resin, and the epoxy resin is filled in the gaps among the windings, so that the purpose of enhancing heat conduction can be achieved. However, epoxy resins have low thermal conductivity (typically 0.8-1.0W/m/K) and poor thermal conductivity.

In view of the foregoing, there is a need to provide a new technical solution to solve the above-mentioned problems.

Disclosure of Invention

The utility model aims at providing a stator module, motor and new technical scheme of robot.

In a first aspect, the present application provides a stator assembly. Comprising the following steps:

the stator iron core comprises a body and a plurality of stator teeth, wherein the plurality of stator teeth are arranged on the inner wall surface of the body, the plurality of stator teeth are arranged at intervals along the circumferential direction of the body, and stator grooves are defined between two adjacent stator teeth;

the stator coils are sleeved on one stator tooth, and two adjacent stator coils form a gap in the same stator groove;

the heat conduction component comprises a connection part and a plurality of heat conduction fins, and the plurality of heat conduction fins are arranged on the connection part;

the connecting portion is located at a first side of the stator core in the axial direction, each heat conducting fin is arranged in one gap and is in contact with the body.

Optionally, the heat conducting component is made of metal.

Optionally, the cross-sectional shape of the heat conducting fin is adapted to the void shape.

Optionally, the body is an annular body, and the heat conducting fin has an arc-shaped surface;

under the condition that the heat conducting fins are arranged in the gaps, the arc-shaped surface is attached to the inner wall surface of the annular body.

Optionally, the heat conducting fin includes a first side and a second side disposed opposite to each other, the first side being in contact with one of the two adjacent stator coils, and the second side being in contact with the other of the two adjacent stator coils.

Optionally, the stator coil includes a wire inlet end and a wire outlet end, the wire inlet end and the wire outlet end are located on the same side of the stator coil, and the setting position of the connecting portion and the setting position of the wire inlet end and the wire outlet end are located on different sides of the stator core.

Optionally, a flow channel is formed inside the connecting part, one end of the flow channel is provided with an inlet, and the other end of the flow channel is provided with an outlet.

Optionally, the stator assembly further includes a bus plate, the bus plate is located at the second side of the stator core in the axial direction, a plurality of slots are formed in the inner wall surface of the bus plate, and the wire inlet end and the wire outlet end of the stator coil are correspondingly fixed in the slots.

Optionally, printed wires are arranged in the bus plate, and all the wire inlet ends and the wire outlet ends of the stator coils form three-phase lead-out parts through the printed wires.

In a second aspect, embodiments of the present application provide an electric machine. The electric machine comprises a stator assembly as described in the first aspect.

Optionally, the motor comprises a casing and an end cover, and the casing and the end cover are enclosed to form a containing cavity; the stator assembly is arranged in the accommodating cavity, the connecting part of the stator assembly is contacted with the end cover through the heat conducting pad, and the body of the stator assembly is contacted with the shell.

In a third aspect, embodiments of the present application further provide a robot. The robot comprises a motor as described in the second aspect.

According to the embodiment of the application, the stator assembly comprises the heat conducting component, and heat generated by the stator coil can be conducted through the heat conducting component to realize two heat conducting paths, so that the heat dissipation capacity of the stator coil is improved, and the temperature rise of the stator coil is effectively reduced.

Other features of the present specification and its advantages will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the specification and together with the description, serve to explain the principles of the specification.

Fig. 1 is a block diagram of a stator assembly according to an embodiment of the present application.

Fig. 2 is an exploded view of a stator assembly according to an embodiment of the present application.

Fig. 3 is a diagram illustrating a structure of a stator coil according to an embodiment of the present application.

Fig. 4 is a diagram illustrating a first structure of a heat conductive member according to an embodiment of the present application.

Fig. 5 is a partial cross-sectional view of a stator assembly provided in an embodiment of the present application.

Fig. 6 is a partial cross-sectional view of a second embodiment of a stator assembly.

Fig. 7 is a second exploded view of a stator assembly according to an embodiment of the present disclosure.

Fig. 8 is a diagram illustrating a second structure of the heat conductive member according to the embodiment of the present application.

Fig. 9 is a structural cross-sectional view of the heat conductive member of fig. 8.

Fig. 10 is a schematic diagram illustrating a heat conduction path of a stator assembly according to an embodiment of the present disclosure.

Fig. 11 is a schematic diagram of a second heat conduction path of the stator assembly according to the embodiment of the present application.

Fig. 12 is a schematic diagram of a third heat conduction path of the stator assembly according to the embodiment of the present application.

Reference numerals illustrate:

1. a stator core; 10. a body; 11. stator teeth; 12. a stator groove;

2. a stator coil; 20. a wire inlet end; 21. a wire outlet end; 22. a straight line portion; 23. an end portion;

3. a heat conductive member; 30. a connection part; 31. a heat conduction fin; 311. an arc surface; 312. a first side; 313. a second side; 301. a flow passage; 302. an inlet; 303. an outlet;

4. a void;

5. a bus plate; 50. a tank body; 51. a first lead-out wire; 52. a second lead-out wire; 53. a third lead-out wire;

6. a housing; 61. a thermal pad; 62. an end cap.

Detailed Description

Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application unless it is specifically stated otherwise.

The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the application, its application, or uses.

Techniques and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate.

In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of exemplary embodiments may have different values.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

A first aspect of an embodiment of the present application provides a stator assembly. The stator assembly comprises the heat conducting component 3, and heat generated by the stator coil 2 can be conducted through the heat conducting component 3 to realize two heat conducting paths, so that the heat dissipation capacity of the stator coil is enhanced, and the temperature rise of the stator coil is effectively reduced.

Referring to fig. 1, 2 and 7, the stator assembly includes a stator core 1, a plurality of stator coils 2 and a heat conductive member 3.

The stator core 1 comprises a body 10 and a plurality of stator teeth 11, wherein a plurality of stator teeth 11 are arranged on the inner wall surface of the body 10, a plurality of stator teeth 11 are arranged at intervals along the circumferential direction of the body 10, and stator grooves 12 are defined between two adjacent stator teeth 11.

Each stator coil 2 is sleeved on one stator tooth 11, and two adjacent stator coils 2 form a gap 4 in the same stator slot 12.

The heat conduction member 3 includes a connection portion 30 and a plurality of heat conduction fins 31, and a plurality of the heat conduction fins 31 are provided on the connection portion 30. The connection portion 30 is located at a first side of the stator core 1 in the axial direction, each of the heat conduction fins 31 is disposed in one of the gaps 4, and the heat conduction fins 31 are in contact with the body 10.

In the embodiment of the present application, the stator assembly mainly includes a stator core 1, a plurality of stator coils 2, and a heat conductive member 3.

Referring to fig. 1 and 2, the stator core 1 includes a body 10, and the body 10 of the stator core 1 is mostly of a ring-shaped structure. The stator core 1 includes a plurality of stator teeth 11, and the plurality of stator teeth 11 are provided on an inner wall surface of the body 10. For example, the plurality of stator teeth 11 and the body 10 may be integrally formed as a structural member. One end of each stator tooth 11 is fixedly connected with the body 10, and the other end of each stator tooth 11 extends inwards in the radial direction of the body 10. The plurality of stator teeth 11 are arranged at intervals along the circumferential direction of the body 10, and stator slots 12 are defined between adjacent two stator teeth 11. Wherein the circumferential spacing dimension of adjacent two stator teeth 11 along the body 10 may or may not be uniform. In the case where the circumferential interval dimension of the adjacent two stator teeth 11 is uniform along the body 10, the sizes of the stator slots 12 formed on the stator core 1 are the same. In the case where the circumferential interval dimension of the adjacent two stator teeth 11 is not uniform along the body 10, the sizes of the stator slots 12 formed on the stator core 1 are not uniform.

Referring to fig. 3, the stator assembly includes a plurality of stator coils 2, wherein the number of the stator coils 2 is identical to the number of the stator teeth 11 on the stator core 1, and each stator coil 2 is correspondingly sleeved on the stator teeth 11. In which the stator coil 2 is directly fitted over the stator teeth 11, that is, the stator coil 2 is wound in advance and does not need to be wound on the stator teeth 11. For example, the stator coil 2 can be assembled to the stator core 1 one by one after being wound and formed by a special winding machine, so that not only the slot filling rate of the winding can be improved (for example, the stator coil 2 can be wound by combining the shape of the stator slot 12 and the shape of the stator tooth 11), but also the problem of difficult wire embedding of the winding on the stator tooth 11 can be avoided. Wherein the stator coils are connected by tracks on the bus plate, and then the stator windings of the motor can be formed.

When each stator coil 2 is correspondingly arranged on the stator teeth 11, a gap 4 is formed between two adjacent stator coils 2 in the same stator slot 12. That is, when two adjacent stator coils 2 are located in the same stator slot 12, the two adjacent stator coils 2 do not completely fill the stator slot 12, so that the gap 4 is formed in the stator slot 12.

Referring to fig. 4, the stator assembly includes a heat conductive member 3, wherein the heat conductive member 3 includes a connection portion 30 and a plurality of heat conductive fins 31, and the plurality of heat conductive fins 31 are disposed on the connection portion 30. For example, the connection portion 30 may have an annular structure, and a plurality of heat conducting fins 31 may be provided at intervals along the circumferential direction of the connection portion 30. Wherein the heat conducting fins 31 of the heat conducting member 3 are required to be disposed in the gaps 4 formed in the stator grooves 12, the number of the heat conducting fins 31 is required to be identical to the number of the stator grooves 12, and the interval dimension of the adjacent heat conducting fins 31 is required to be correlated with the interval dimension of the adjacent stator grooves 12.

The heat conduction member 3 is disposed on one side of the stator core 1 in the axial direction, specifically, the connection portion 30 of the heat conduction member 3 is disposed on the first side of the stator core 1 in the axial direction, each heat conduction fin 31 is disposed in one of the gaps 4 and the heat conduction fin 31 is in contact with the body 10. For example, the connection portion 30 of the heat conductive member 3 is located at a first side in the axial direction of the stator core 1, and each of the heat conductive fins 31 is inserted into the corresponding space 4. After the heat conduction fins 31 are inserted into the gaps 4, the heat conduction fins 31 are in contact with the body 10 of the stator core 1.

Specifically, the connection portion 30 of the heat conduction member 3 is located at the first side in the axial direction of the stator core 1, each of the heat conduction fins 31 is inserted into the corresponding space 4 and the heat conduction fins 31 are in contact with the body 10 of the stator core 1, so that two heat conduction paths are formed on the stator assembly by the arrangement of the heat conduction member 3. Referring to fig. 10, the first heat conduction path (the first heat conduction path may be a radial direction heat conduction path) is: heat generated from the stator coil 2 is conducted to the body 10 of the stator core 1 through the heat conducting fins 31. When the stator assembly is applied to the motor, heat is transferred to the shell 6 of the motor through the body 10 of the stator core 1, and finally, the heat of the shell 6 is taken away by other fluids (such as air, water and the like) through radiation and convection, so that the purpose of temperature rise of the windings in the ground is achieved. Referring to fig. 11, the second heat conduction path (the second heat conduction path may be an axial direction heat conduction path) is: heat of the stator coil 2 is conducted to the connection portion 30 through the heat conducting fin 31. When the stator assembly is applied to the motor, heat is conducted to the housing of the motor (the housing of the electrode comprises the shell 6 and the end cover 62) through the stator assembly, so that the heat dissipation capacity of the stator coil 2 is enhanced, and the temperature rise of the stator coil 2 is effectively reduced.

Therefore in this application embodiment, provided a stator module, through set up a heat conduction part 3 on stator module, realized carrying out the effect of heat conduction with the heat that stator coil 2 produced through two heat conduction paths, to a great extent can strengthen stator coil 2's heat dispersion, effectively reduce stator coil 2's temperature rise.

In one embodiment, referring to fig. 1, 2, 7 and 4, the material of the heat conductive member 3 is a metal material.

In this embodiment, the material of the heat conduction member 3 is defined so that the heat conduction member 3 is a member having high heat conductivity, and the heat radiation capability of the stator coil 2 can be further enhanced, and the temperature rise of the stator coil 2 can be reduced. For example, the heat conducting component 3 may be made of metal copper or metal aluminum, so that the heat conducting effect of the heat conducting component 3 is better than that of epoxy resin, silicon steel sheet and the like, the heat dissipation capacity of the winding is further enhanced, and the temperature rise of the winding is reduced.

In one embodiment, referring to fig. 10, the cross-sectional shape of the heat conducting fin 31 is adapted to the shape of the void 4.

In this embodiment, the cross section of the heat conducting fin 31 is formed to be adapted to the shape of the gap 4 formed in the stator slot 12, so that when the heat conducting fin 31 is inserted into the gap 4 in the stator slot 12, the stator coil 2 is more likely to contact with the surface of the heat conducting fin 31, and the heat conducting fin 31 more directly conducts the heat generated by the stator coil 2.

In one embodiment, referring to fig. 2, 5 and 6, the body 10 is an annular body 10, and the heat conducting fin 31 has an arc surface 311; when the heat-conducting fin 31 is disposed in the space 4, the arcuate surface 311 is bonded to the inner wall surface of the annular body 10.

Specifically, fig. 5 shows a schematic structural view of the heat conduction fins 31 at the gaps 4 where they are not inserted into the stator grooves 12. Referring to fig. 5, adjacent two stator coils 2 form a gap 4 in the same stator slot 12. Fig. 6 shows a schematic structural view of the heat conduction fin 31 inserted into the stator groove 12 at the space 4. Wherein the cross-section of the heat conducting fin 31 is shaped like a triangle and the shape of the void 4 formed in the stator slot 12 is also shaped like a triangle. The heat conducting fin 31 is inserted into the gap 4 in the stator slot 12, the surface of the heat conducting fin 31 facing the body 10 is an arc surface 311, the arc surface 311 is attached to the bottom of the stator slot 12, the heat generated by the stator coil 2 is conducted to the body 10 of the stator core 1, a first heat conducting path is formed, the heat generated by the stator coil 2 is conducted out through the body 10 of the stator core 1, and referring to fig. 10, an arrow shows the heat conducting direction of the first heat conducting path.

In one embodiment, referring to fig. 6 and 10, the heat conducting fin 31 includes a first side 312 and a second side 313 disposed opposite to each other, the first side 312 being in contact with one stator coil 2 of two adjacent stator coils 2, and the second side 313 being in contact with the other stator coil 2 of two adjacent stator coils 2.

In this embodiment, the heat conducting fin 31 includes a first side 312 and a second side 313 disposed opposite to each other, wherein the first side 312 and the second side 313 are disposed opposite to each other in the circumferential direction of the connection portion 30, for example, the heat conducting fin 31 may be a triangular prism structure.

When the heat conducting fin 31 is inserted into the gap 4 of the stator slot 12, the surface of the heat conducting fin 31 opposite to the body 10 of the stator core 1 (for example, the body 10 is in a ring structure, the surface opposite to the body 10 of the stator core 1 may be an arc surface 311) is in contact with the body 10, the first side 312 of the heat conducting fin 31 connected with the arc surface 311 is in contact with one of the stator coils 2, and the second side 313 of the heat conducting fin 31 connected with the arc surface 311 is in contact with the other stator coil 2, so that the heat generated by the stator coil 2 can be directly conducted by the heat conducting fin 31 along the first heat conducting path and the second heat conducting path, so as to improve the heat dissipation capability of the stator coil 2.

It should be noted that, in the case where the first side 312 of the heat conducting fin 31 contacts the stator coil 2 and in the case where the second side 313 of the heat conducting fin 31 contacts the stator coil 2, an insulation design may be made in a region where the heat conducting fin 31 contacts the stator coil 2, or an insulation design may be made in all regions of the heat conducting fin 31, for example, different insulation treatment schemes may be adopted according to different materials of the heat conducting fin 31, for example, the heat conducting fin 31 is made of an aluminum alloy, and the aluminum alloy may be an insulation anodized or electrostatic sprayed epoxy powder; the heat conducting fin 31 is made of copper alloy, and the copper alloy can be sprayed with epoxy powder.

It should be further noted that the complete contact of the first side 312 of the heat conducting fin 31 with the stator coil 2 and the complete contact of the second side 313 of the heat conducting fin 31 with the stator coil 2 is a preferred embodiment, and that there may be a reasonable tolerance between the first side 312 of the heat conducting fin 31 and the stator coil 2 and a reasonable tolerance between the second side 313 of the heat conducting fin 31 and the stator coil 2, provided that the heat conducting fin 31 conducts heat generated by the stator coil 2, in view of the ease of mounting the stator coil 2 to the stator teeth 11 and in view of the ease of inserting the heat conducting fin 31 into the gap 4 of the stator slot 12.

In one embodiment, referring to fig. 4, 2 and 7, the stator coil 2 includes a wire inlet end 20 and a wire outlet end 21, the wire inlet end 20 and the wire outlet end 21 are located on the same side of the stator coil 2, and the connection portion 30 is located on the opposite side of the stator core 1 from the wire inlet end 20 and the wire outlet end 21.

In this embodiment, the stator coil 2 includes the wire inlet end 20 and the wire outlet end 21, for example, the wound stator coil 2 includes two straight portions 22 disposed opposite to each other and two end portions 23 disposed opposite to each other, and the wound stator coil 2 is similar to a rectangular frame structure. The wire inlet end 20 of the stator coil 2 can be a wire extending from the inner ring of the stator coil 2, and the wire outlet end 21 is a wire extending from the outer ring of the stator coil 2; or the wire inlet end 20 of the stator coil 2 may be a wire extending from the outer ring of the stator coil 2, and the wire outlet end 21 is a wire extending from the inner ring of the stator coil 2.

Wherein the wire inlet end 20 and the wire outlet end 21 included in the stator coil 2 are located on the same side of the stator coil 2, the setting position of the connection portion 30 and the setting position of the wire inlet end 20 and the wire outlet end 21 of the stator coil 2 are located on different sides of the stator core 1, that is, the heat conducting fins 31 of the heat conducting component 3 are inserted into the gaps 4 of the stator slots 12 from the non-wire outlet end 21 of the stator coil 2, so that the heat conducting fins 31 of the heat conducting component 3 are prevented from being inserted into the stator slots 12 from the wire outlet end 21 of the stator coil 2, and adverse effects on the wire routing of the stator coil 2 are avoided.

In one embodiment, referring to fig. 7, 8 and 9, a flow channel 301 is formed inside the connection part 30, one end of the flow channel 301 is provided with an inlet 302, and the other end of the flow channel 301 is provided with an outlet 303.

In this embodiment, a liquid cooling structure may be used on the heat conducting member 3, so as to further enhance the heat dissipation capability of the stator coil 2 and reduce the temperature rise of the stator coil 2.

Specifically, the flow path 301 is formed inside the connection portion 30, for example, a cavity is formed inside the connection portion 30, through which the flow path 301 for heat dissipation is arranged on the connection portion 30. An inlet 302 and an outlet 303 are further provided on the connection portion 30, one end of the flow channel 301 is communicated with the inlet 302, and the other end of the flow channel 301 is communicated with the outlet 303, so that heat can be dissipated to the stator coil 2 through a liquid cooling mode.

In one embodiment, referring to fig. 2 and 7, the stator assembly further includes a bus plate 5, the bus plate 5 is located on the second side of the stator core 1 in the axial direction, a plurality of slots 50 are formed on the inner wall surface of the bus plate 5, and the wire inlet end 20 and the wire outlet end 21 of the stator coil 2 are correspondingly welded in the slots 50.

In this embodiment, the stator assembly further includes a bus plate 5, where the bus plate 5 and the heat conducting member 3 are distributed on different sides of the axial direction of the stator core 1, for example, when the heat conducting fins 31 of the heat conducting member 3 are inserted into the stator slots 12 from the non-wire-outgoing sections of the stator coil 2, the connection portion 30 is located on the first side of the axial direction of the stator core 1, and the bus plate 5 is located on the second side of the axial direction of the stator core 1, and the bus plate 5 is located on the wire outgoing end 21 side of the stator coil 2, so that the wire incoming end 20 and the wire outgoing end 21 of the stator coil 2 are connected with the bus plate 5 conveniently.

In this embodiment, a plurality of slots 50 are formed on the inner wall surface of the bus plate 5, and the wire inlet end 20 and the wire outlet end 21 of the stator coil 2 are welded in the slots 50 correspondingly. Specifically, the inlet wire ends 20 and the outlet wire ends 21 of all the stator coils 2 are welded in the slot body 50, respectively. For example, the number of the slots 50 formed in the inner wall of the bus plate 5 is equal to the sum of the number of the wire inlet ends 20 of all the stator coils 2 and the number of the wire outlet ends 21 of all the stator coils 2, so that the wire inlet ends 20 and the wire outlet ends 21 of each stator coil 2 can be correspondingly welded in the slots 50 formed in the bus plate 5. For example, when all the stator coils 2 are assembled, the wire inlet ends 20 and the wire outlet ends 21 of all the stator coils 2 are arranged and then placed into the pre-arranged welding grooves of the bus plate 5 for welding, so that a three-phase winding of the motor can be formed.

In one embodiment, referring to fig. 2 and 7, the busbar 5 is internally provided with tracks, through which all the incoming and outgoing ends 20, 21 of the stator coil 2 form a three-phase outgoing portion.

In this embodiment, the tracks are produced according to the connection law of the stator coils 2, the purpose of which is to connect the stator coils 2 distributed in different stator slots 12 into three-phase windings, which simplifies the connection process of the stator coils 2.

For example, the wire inlet terminals 20 and the wire outlet terminals 21 of all the stator coils 2 form three-phase lead-out portions by the printed wiring, the three-phase lead-out portions include a first lead-out portion, a second lead-out portion and a third lead-out portion, three lead-out wires are provided on the bus plate 5, the three lead-out wires include a first lead-out wire 51, a second lead-out wire 52 and a third lead-out wire 53, the first lead-out wire 51 and the first lead-out portion are electrically connected, the second lead-out wire 52 and the second lead-out portion are electrically connected, and the third lead-out wire 53 and the third lead-out portion are electrically connected.

It should be noted that, a person skilled in the art may select the printed wiring of different wiring forms according to actual requirements, and the wiring form of the printed wiring is not limited in the present application, so long as the wire inlet end 20 and the wire outlet end 21 of the stator coil 2 can be correspondingly welded into the slot 50, and the wire inlet end 20 and the wire outlet end 21 are connected with the printed wiring. Then, the three-phase lead-out part is formed by printing.

In a second aspect, embodiments of the present application also provide an electric machine. The motor includes a stator assembly as described above.

In an embodiment of the present application, a motor is provided, which may be a frameless motor. The stator assembly is applied to the motor, and the overall heat dissipation capacity and heat dissipation efficiency of the motor can be improved.

In one embodiment, referring to fig. 12, the motor includes a housing 6 and an end cover 62, the housing 6 and the end cover 62 enclosing a receiving cavity;

the stator assembly is arranged in the accommodating cavity, the connecting part 30 of the stator assembly is contacted with the end cover 62 through the heat conducting pad 61, and the body of the stator assembly is contacted with the machine shell 6.

In this embodiment, the heat conduction fins 31 of the heat conduction member 3 are inserted from the non-outlet end 21 of the stator coil 2 to the gaps 4 of the stator slots 12, the surface of the heat conduction fins 31 facing the body 10 of the stator core 1 is bonded to the bottom of the stator slots 12, and the heat generated by the stator coil 2 is conducted to the body 10 portion of the stator core 1 to form a first heat conduction path, and referring to fig. 10, the first heat conduction path is shown. At the same time, the heat generated by the stator coil 2 will also be conducted along the heat conducting fins 31 from the axial direction, forming a second heat conducting path, and the heat finally reaches the connection portion 30. Referring to fig. 11, a second thermal conduction path is shown.

When the stator assembly is applied to the motor, the connection part 30 is in contact with the motor end cover 62, in the second heat conduction path, the heat conduction fins 31 conduct heat generated by the stator coil 2 to the connection part 30, the connection part 30 conducts heat to the motor end cover 62, and the heat generated by the stator coil 2 is transferred to the nearby air through convection of the motor end cover 62 and the nearby air, so that the purpose of reducing the temperature rise of the stator coil 2 is achieved.

For example, the stator assembly is housed in the motor casing 6, and the heat conductive member 3 in the stator assembly is in contact with the motor end cover 62 through the heat conductive pad 61. Referring to fig. 12, heat generated from the stator coil 2 can be effectively conducted through the first heat conduction path (the stator coil 2-heat conduction fins 31-the body 10-the case 6 of the stator core 1) and the second heat conduction path (the stator coil 2-heat conduction fins 31-the connection portion 30-the heat conduction pad 61-the end cover 62), thereby achieving the purpose of reducing the temperature rise of the stator coil 2.

In a third aspect, embodiments of the present application further provide a robot. The robot comprises a motor as described above.

In the embodiment of the application, a robot is also provided, and the motor is applied to the robot, for example, the motor can be applied to a joint of the robot.

The foregoing embodiments mainly describe differences between the embodiments, and as long as there is no contradiction between different optimization features of the embodiments, the embodiments may be combined to form a better embodiment, and in consideration of brevity of line text, no further description is given here.

Although some specific embodiments of the present application have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present application. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the present application. The scope of the application is defined by the appended claims.

Claims (12)

1. A stator assembly, comprising:

the stator core (1) comprises a body (10) and a plurality of stator teeth (11), wherein the plurality of stator teeth (11) are arranged on the inner wall surface of the body (10), the plurality of stator teeth (11) are arranged at intervals along the circumferential direction of the body (10), and stator grooves (12) are defined between two adjacent stator teeth (11);

a plurality of stator coils (2), wherein each stator coil (2) is sleeved on one stator tooth (11), and two adjacent stator coils (2) form a gap (4) in the same stator slot (12);

a heat conduction member (3) including a connection portion (30) and a plurality of heat conduction fins (31), the plurality of heat conduction fins (31) being provided on the connection portion (30);

the connecting parts (30) are positioned on the first side of the stator core (1) in the axial direction, each heat conducting fin (31) is arranged in one gap (4), and the heat conducting fins (31) are in contact with the body (10).

2. Stator assembly according to claim 1, characterized in that the material of the heat conducting member (3) is a metallic material.

3. Stator assembly according to claim 1, characterized in that the cross-sectional shape of the heat conducting fins (31) is adapted to the shape of the interspace (4).

4. The stator assembly according to claim 1, characterized in that the body (10) is an annular body, the heat conducting fins (31) having an arcuate face (311);

when the heat conduction fin (31) is disposed in the gap (4), the arc surface (311) is attached to the inner wall surface of the annular body.

5. The stator assembly according to claim 2, characterized in that the heat conducting fin (31) comprises a first side (312) and a second side (313) arranged opposite, the first side (312) being in contact with one (2) of the two adjacent stator coils (2), the second side (313) being in contact with the other (2) of the two adjacent stator coils (2).

6. The stator assembly according to claim 1, characterized in that the stator coil (2) comprises an incoming wire end (20) and an outgoing wire end (21), the incoming wire end (20) and the outgoing wire end (21) being located on the same side of the stator coil (2), the connection (30) being located on the opposite side of the stator core (1) from the incoming wire end (20) and the outgoing wire end (21).

7. The stator assembly according to claim 1, characterized in that a flow channel (301) is formed inside the connection part (30), one end of the flow channel (301) is provided with an inlet (302), and the other end of the flow channel (301) is provided with an outlet (303).

8. The stator assembly according to any one of claims 1-7, further comprising a bus plate (5), wherein the bus plate (5) is located at a second side of the stator core (1) in the axial direction, a plurality of slot bodies (50) are formed on an inner wall surface of the bus plate (5), and the wire inlet end (20) and the wire outlet end (21) of the stator coil (2) are welded in the slot bodies (50) correspondingly.

9. Stator assembly according to claim 8, characterized in that the busbar (5) is internally provided with tracks by means of which the incoming (20) and outgoing (21) ends of all the stator coils (2) form three-phase outlets.

10. An electric machine comprising a stator assembly according to any one of claims 1-9.

11. The electric machine according to claim 10, characterized in that it comprises a casing (6) and an end cap (62), the casing (6) and the end cap (62) enclosing to form a containment cavity;

the stator assembly is arranged in the accommodating cavity, the connecting part (30) of the stator assembly is contacted with the end cover (62) through a heat conducting pad (61), and the body of the stator assembly is contacted with the shell (6).

12. A robot comprising a motor as claimed in claim 10 or claim 11.