Motor

Abstract

The utility model discloses a motor, which comprises a mounting bracket, a first heat dissipation shell and a second heat dissipation shell, wherein the first heat dissipation shell and the second heat dissipation shell are detachably arranged at two opposite ends of the mounting bracket along the axial direction; a controller is installed in the first heat dissipation shell, a motor part is installed in the second heat dissipation shell, the installation support is provided with a first air inlet communicated with the outside and a first air outlet communicated with the second heat dissipation shell, and a flow guide channel is formed between the installation support and the first heat dissipation shell. The flow section of the flow guide channel is in a decreasing trend in the airflow direction, and airflow passing through the first air inlet flows into the flow guide channel and flows out of the first air outlet after being accelerated. The heat dissipation device further comprises a fan, the fan is arranged on the side, facing the second heat dissipation shell, of the installation support, and air flow flowing out of the first air outlet is guided to flow to the second heat dissipation shell through power of the fan. The motor provided by the utility model is used for reducing the size of the motor and reducing the cost of the motor.

Description

Technical Field

[0001] This utility model relates to an electric motor. Background Technology

[0002] Electric motors are a common type of drive element used to move various devices. The main components of an electric motor include the motor itself and the controller. Both the motor and controller generate heat during operation. If this heat accumulates continuously, it can cause the motor and controller to overheat, affecting their operation and lifespan.

[0003] To dissipate heat from the motor components and controller, existing motors typically incorporate cooling mechanisms such as fans. Current motors often have two cooling mechanisms: one for cooling the motor components and the other for cooling the controller. However, these two mechanisms require considerable installation space, resulting in a larger motor size and higher cost. Utility Model Content

[0004] In view of the shortcomings of the existing technology, this utility model provides a motor that reduces the size and cost of the motor.

[0005] This utility model is achieved through the following technical solution:

[0006] An electric motor includes a mounting bracket and a first heat dissipation housing and a second heat dissipation housing detachably disposed at opposite ends of the mounting bracket along an axial direction; wherein a controller is installed in the first heat dissipation housing, and a motor component is installed in the second heat dissipation housing.

[0007] The mounting bracket is provided with a first air inlet communicating with the outside and a first air outlet communicating with the second heat dissipation shell. A flow guide channel is constructed between the mounting bracket and the first heat dissipation shell. The flow cross-section of the flow guide channel decreases along the airflow direction. The airflow through the first air inlet flows into the flow guide channel, accelerates, and then flows out from the first air outlet.

[0008] It also includes a fan, which is disposed on the side of the mounting bracket facing the second heat sink housing, and the fan power guides the airflow from the first air outlet to the second heat sink housing.

[0009] Furthermore, the airflow at the first air inlet flows radially into the guide channel, and the airflow at the first air outlet flows axially out of the guide channel.

[0010] Furthermore, the cross-sectional area of ​​the first air inlet in the radial direction is smaller than the cross-sectional area of ​​the guide channel where it connects to the first air inlet, so that the guide channel can receive all the airflow flowing in from the first air inlet; the cross-sectional area of ​​the first air inlet in the radial direction is larger than the cross-sectional area of ​​the guide channel where it connects to the first air outlet, so that the airflow in the guide channel can be accelerated.

[0011] Furthermore, the mounting bracket, the fan, and the second heat sink housing are arranged sequentially at intervals along the motor axis.

[0012] Furthermore, the fan is mounted on the rotating shaft of the motor component and rotates synchronously with the rotating shaft.

[0013] Furthermore, the fan has a second air inlet and a second air outlet. The second air inlet is connected to the first air outlet and can redirect the axially flowing airflow to radial flow before it flows out through the second air outlet.

[0014] Furthermore, the fan includes a connecting part, a fan fin part, a first fixing part, and a second fixing part.

[0015] The connecting part is fixedly connected to the rotating shaft of the motor component;

[0016] The number of fan fins is provided in multiple ways, and the multiple fan fins are arranged circumferentially on the connecting part;

[0017] The first fixing part and the second fixing part are axially spaced on opposite sides of the fan fin, wherein the first fixing part is circumferentially disposed at the outer edge of the fan fin and located on one side of the first air outlet, and the second fixing part is circumferentially disposed at the root of the fan fin.

[0018] The gap between the first fixing part and the connecting part constitutes the second air inlet, and the gap between the outer edge of the first fixing part and the outer edge of the second fixing part constitutes the second air outlet.

[0019] Furthermore, the projection of the first air outlet in the radial direction covers the second air inlet, so that the airflow in the second air inlet is greater than or equal to a preset value in real time.

[0020] Furthermore, the mounting bracket is provided with a first protrusion protruding towards the first fixing part near the first air outlet, and the first fixing part is provided with a corresponding second protrusion. The first protrusion is radially arranged around the outside of the second protrusion and axially extends to be flush with or beyond the end face of the first protrusion, so as to form an airflow channel.

[0021] Furthermore, the mounting bracket includes a flange portion located axially between the first heat dissipation housing and the second heat dissipation housing, and the flange portion and the first heat dissipation housing form the flow guiding channel;

[0022] An installation space for accommodating the fan is formed between the flange and the second heat dissipation housing.

[0023] Furthermore, the flange portion has a hollowed-out center to form the first air outlet.

[0024] Furthermore, the flange portion has a first guide surface, the first heat dissipation housing has a first guide surface extending radially, the first heat dissipation housing has a second guide surface corresponding to the first guide surface, and the angle between the projection of the end face of the first guide surface and the second guide surface perpendicular to the axis and the radial direction is an acute angle.

[0025] Furthermore, the angle between the projection of the first and second guide surfaces on their end faces perpendicular to the axis and the radial direction is 10-15°.

[0026] Furthermore, the second guide surface of the first heat dissipation housing facing the mounting bracket is an inclined surface that gradually tilts toward the mounting bracket along the gas flow direction;

[0027] The first guide surface of the flange facing the first heat dissipation housing is an inclined surface that gradually slopes toward the first heat dissipation housing along the gas flow direction.

[0028] Furthermore, the flow channel includes a stabilizing flow zone and a turbulent flow zone that are interconnected along the radial direction. The inflow end of the turbulent flow zone is connected to the first air inlet, and the outflow end of the stabilizing flow zone is connected to the first air outlet. The airflow flows through the first air inlet, the turbulent flow zone, the stabilizing flow zone, and the first air outlet in sequence.

[0029] Furthermore, the first heat dissipation housing has a plurality of heat dissipation ribs protruding from one end facing the mounting bracket, and the sidewalls of two adjacent heat dissipation ribs form an independent branch flow path, each of which is connected to the first air inlet and the first air outlet.

[0030] Furthermore, the end face of the heat dissipation fin is configured to conform to the shape of the first airflow guiding surface.

[0031] Furthermore, the first heat dissipation housing has a receiving cavity for accommodating the controller, and the receiving cavity is sealed and separated from the flow channel.

[0032] Furthermore, the mounting bracket is provided with a first locking hole at one end facing the first heat sink housing, and the first heat sink housing and the mounting bracket are fixedly connected by a locking member installed in the first locking hole;

[0033] The mounting bracket has a second locking hole at the end opposite to the first heat sink housing, and the second heat sink housing and the mounting bracket are fixedly connected by a locking member installed in the second locking hole.

[0034] Furthermore, the mounting bracket is made of plastic, while the first heat sink and the second heat sink are made of metal, and the first heat sink and the second heat sink are separated by the mounting bracket.

[0035] Furthermore, it also includes a connecting wire connected to the motor component, the first heat sink housing is connected to a controller end cover, the first heat sink housing and the controller end cover form an installation chamber for accommodating the controller; one end of the connecting wire extends to the controller end cover and is connected to a connector, the connector is electrically connected to the connecting wire, and passes through the controller end cover and is electrically connected to the controller.

[0036] Compared with the prior art, the advantages of this utility model are at least as follows:

[0037] By setting up a flow channel, a first air inlet, and a second air inlet, external air can flow sequentially through the first and second heat dissipation shells inside the motor to dissipate heat from the first and second heat dissipation shells. Therefore, the motor of this invention only needs to be equipped with one heat dissipation mechanism to dissipate heat from the first and second heat dissipation shells. The motor has a simple structure, small size, and low cost. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the structure of a motor according to an embodiment of the present invention;

[0039] Figure 2 This is a planar sectional view of a motor according to an embodiment of the present invention;

[0040] Figure 3 This is a partial cross-sectional view of a motor according to an embodiment of the present invention;

[0041] Figure 4 for Figure 3 Enlarged view of section A in the middle;

[0042] Figure 5 This is another partial cross-sectional view of a motor according to an embodiment of the present invention;

[0043] Figure 6 This is a schematic diagram of the structure of a motor mounting bracket according to an embodiment of the present invention;

[0044] Figure 7 This is a schematic diagram of the structure of the first heat dissipation housing of a motor according to an embodiment of the present invention;

[0045] Figure 8 This is a partial cross-sectional view of the motor portion structure according to an embodiment of the present invention;

[0046] Figure 9 This is a schematic diagram of the structure of the fan of the motor according to an embodiment of the present invention;

[0047] Figure 10 This is a planar sectional view of a motor according to an embodiment of the present invention;

[0048] Figure 11 for Figure 10 Enlarged view of section B;

[0049] Figure 12 This is a partial structural diagram of a motor according to an embodiment of the present invention;

[0050] Figure 13 This is a partial cross-sectional view of a motor according to an embodiment of the present invention;

[0051] Figure 14 This is an exploded view of a portion of the structure of a motor according to an embodiment of the present invention.

[0052] In the diagram: 1. Mounting bracket; 11. First air inlet; 12. First air outlet; 13. First protrusion; 14. Flange; 141. First guide surface; 142. First end face; 143. Guide section; 144. Rib; 15. Side wall; 16. First locking hole; 17. Second locking hole; 2. First heat dissipation shell; 21. Second guide surface; 211. First part; 212. Second part; 22. Heat dissipation rib; 23. Receiving cavity; 24. Controller end cover; 25. Second main body shell; 26. Seal; 261. Sealing hole; 262. Embedding groove; 3. Second heat dissipation shell; 31. Notch; 32. First main body shell; 33. Stator and rotor end cover; 4. Flow guiding channel; 41. Flow stabilization zone; 42. Turbulent flow zone; 5. Fan; 51. Second protrusion; 52. Second air inlet; 53. Second air outlet; 54. Connecting part; 55. Fan fin part; 56. First fixing part; 57. Second fixing part; 6. Controller; 7. Motor component; 71. Connecting part; 711. Conducting part; 7111. Head; 7112. Main body part; 712. First bending part; 713. Second bending part; 72. Guide assembly; 721. Connecting part; 7211. Connecting hole; 722. Guide part; 7221. Pressing end face; 723. Accommodation space; 724. First mounting part; 725. Second mounting part; 73. Guide channel. Detailed Implementation

[0053] The following detailed, non-limiting description of the utility model's technical solution, in conjunction with preferred embodiments and accompanying drawings, is provided. In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0054] like Figure 1 and Figure 2 As shown, a motor corresponding to a preferred embodiment of the present invention includes a mounting bracket 1 and a first heat dissipation housing 2 and a second heat dissipation housing 3 that are detachably disposed at opposite ends of the mounting bracket 1 along the axial direction, and may also include a fan 5.

[0055] Further reference Figure 6 The mounting bracket 1 may include a flange portion 14 located between the first heat dissipation housing 2 and the second heat dissipation housing 3, and a side wall 15 surrounding the outside of the flange portion 14. The mounting bracket 1 is provided with a first air inlet 11 communicating with the outside and a first air outlet 12 communicating with the second heat dissipation housing 3. The flange portion 14 is hollowed out at the middle position to form the first air outlet 12. Specifically, the flange portion 14 has a plurality of circumferentially arranged ribs 144 at the middle position, and the hollow structure is axially connected between two adjacent ribs 144. The flange portion 14 may also include a guide portion 143, which can be connected to the side wall 15 and the ribs 144 respectively, for example, integrally connected to the side wall 15 and the ribs 144 respectively. Specifically, the guide portion 143 is an annular structure, with the inner ring of the guide portion 143 integrally connected to the ribs 144 and the outer ring of the guide portion 143 integrally connected to the side wall 15.

[0056] Specifically, the first air inlet 11 can be located on the side wall 15 of the mounting bracket 1, and one or more first air inlets 11 can be provided; preferably, multiple first air inlets 11 are provided, and the multiple first air inlets 11 are distributed at intervals along the circumference of the mounting bracket 1. Each first air inlet 11 can be used to allow external gas to pass through, so that the gas can enter the interior of the mounting bracket 1, i.e., the interior of the motor, at different positions along the circumference of the mounting bracket 1. The gas flowing into the guide channel 4 at each first air inlet 11 gathers from the periphery towards the center. The first air inlet 11 can penetrate the side wall 15 of the mounting bracket 1 radially along the motor, so that the interior of the mounting bracket 1 is connected to the outside, and the flow at the first air inlet 11 flows radially into the guide channel 4.

[0057] Further reference Figure 3 and Figure 4 The first air outlet 12 can pass through the mounting bracket 1 along the motor axis, and the airflow at the first air outlet 12 flows out of the guide channel 4 along the axis. The cross-sectional area of ​​the first air inlet 11 in the radial direction is smaller than the cross-sectional area of ​​the guide channel 4 where it connects to the first air inlet 11, so that the guide channel 4 can receive all the airflow flowing in from the first air inlet 11. The cross-sectional area of ​​the first air inlet 11 in the radial direction is larger than the cross-sectional area of ​​the guide channel 4 where it connects to the first air outlet 12, so that the airflow in the guide channel 4 can be accelerated.

[0058] The first heat sink 2, the mounting bracket 1, and the second heat sink 3 can be arranged sequentially along the motor axis, for example, they can be arranged at intervals along the motor axis. The first air outlet 12 can be a flange portion 14 that passes through the mounting bracket 1 along the motor axis; that is, the axially penetrating perforated structure formed between two adjacent ribs 144 is the first air outlet 12. The first heat sink 2, the flange portion 14 of the mounting bracket 1, and the second heat sink 3 are arranged at intervals along the motor axis.

[0059] A flow channel 4 is constructed between the mounting bracket 1 and the first heat sink 2. For example, the flange portions 14 of the mounting bracket 1 and the first heat sink 2 are spaced apart along the motor axis to form the flow channel 4. The flow channel 4 connects the first air inlet 11 and the first air outlet 12, and the flow cross-section of the flow channel 4 decreases along the airflow direction. External gas can flow into the flow channel 4 from the first air inlet 11 and pass through the first heat sink 2 used to form the flow channel 4 to carry away the heat of the first heat sink 2. Then the gas can continue to flow from the flow channel 4 and be accelerated. The accelerated gas passes through the first air outlet 12 to flow towards the second heat sink 3 located at the end of the mounting bracket 1 opposite to the first heat sink 2, thereby carrying away the heat generated by the second heat sink 3.

[0060] Further reference Figure 4 and Figure 5In some specific embodiments, the flange portion 14 includes a first guide surface 141 facing the first heat dissipation housing 2. For example, the first guide surface 141 is formed on the end face of the guide portion 143 of the flange portion 14 facing the first heat dissipation housing 2. The first heat dissipation housing 2 includes a second guide surface 21 facing the mounting bracket 1, and the second guide surface 21 is disposed opposite to the first guide surface 141. The first guide surface 141 and the second guide surface 21 can form at least a partial guide channel 4, and the at least partial guide channel 4 formed by the first guide surface 141 and the second guide surface 21 communicates with the first air inlet 11.

[0061] The angle between the projection of the end faces of the first guide surface 141 and the second guide surface 21 perpendicular to the axis and the radial direction is an acute angle. Therefore, the cross-sectional area of ​​the partial guide channel enclosed by the first guide surface 141 and the second guide surface 21 gradually decreases along the gas flow direction. The partial guide channel enclosed by the first guide surface 141 and the second guide surface 21 is connected to the first air inlet 11. That is, the external gas enters the partial guide channel enclosed by the first guide surface 141 and the second guide surface 21 from the first air inlet 11, and then gradually flows along the partial guide channel enclosed by the first guide surface 141 and the second guide surface 21. Under the guiding effect of the partial guide channel enclosed by the first guide surface 141 and the second guide surface 21, the gas gradually converges and gradually forms a smooth and consistent airflow, thereby improving the smoothness of gas flow.

[0062] In a preferred embodiment, to further improve the gas guiding effect of the partial guiding channel formed by the first guiding surface 141 and the second guiding surface 21, and to further improve the smoothness of gas flow, the included angle α formed by the first guiding surface 141 and the second guiding surface 21 can specifically be 20-30°. The included angle β formed between the projection of the end face of the second guiding surface 21 perpendicular to the axis and the radial direction can be 10-15°; the included angle γ formed between the projection of the end face of the first guiding surface 141 perpendicular to the axis and the radial direction is 10-15°.

[0063] In some specific embodiments, the second guide surface 21 can be an inclined surface. For example, the second guide surface 21 gradually tilts towards the mounting bracket 1 along the gas flow direction, that is, the distance between the second guide surface 21 and the mounting bracket 1 gradually decreases along the gas flow direction. Therefore, after the gas flows into the guide channel 4 from the first air inlet 11, it will gradually converge under the guidance of the second guide surface 21 to form a smooth and uniform gas flow. Furthermore, the first guide surface 141 of the guide portion 143 of the flange 14 facing the first heat dissipation housing 2 can be an inclined surface. For example, the first guide surface 141 gradually tilts towards the first heat dissipation housing 2 along the gas flow direction, that is, the distance between the first guide surface 141 and the first heat dissipation housing 2 gradually decreases along the gas flow direction. Therefore, after the gas flows into the guide channel 4 from the first air inlet 11, it will gradually converge under the guidance of the first guide surface 141 to form a smooth and uniform gas flow. Alternatively, only the second guide surface 21 can be configured as an inclined surface, and only the second guide surface 21 can guide the gas; or only the first guide surface 141 can be configured as an inclined surface, and only the first guide surface 141 can guide the gas; or both the second guide surface 21 and the first guide surface 141 can be configured as inclined surfaces, and both the second guide surface 21 and the first guide surface 141 can be used together to guide the gas. To make the second guide surface 21 form an inclined surface, the end of the first heat sink 2 facing the mounting bracket 1 can be an inverted frustum-shaped structure or an inverted cone-shaped structure; to make the first guide surface 141 form an inclined surface, the mounting bracket 1 can be an inverted frustum-shaped structure or an inverted cone-shaped structure.

[0064] In this application, the first guide surface 141 and the second guide surface 21 are respectively set as inclined surfaces. Firstly, they can guide the turbulent airflow over a larger area, improving the guiding efficiency and stability. Secondly, with a fixed radial length, the inclined surfaces can also maximize the guiding path and heat dissipation area, thereby better improving the heat dissipation effect of the airflow on the first heat dissipation shell 2.

[0065] In some specific embodiments, the second guide surface 21 of the first heat dissipation housing 2 facing the mounting bracket 1 includes a first portion 211 and a second portion 212 arranged sequentially along the gas flow direction. The projection of the first portion 211 along the motor axis can coincide with the projection of the first guide surface 141 of the flange portion 14 along the motor axis, and the projection of the second portion 212 along the motor axis can coincide with the portion of the end face extension of the rib 144 extending along the motor axis. When gas flows from the first air inlet 11 into the partial guide channel enclosed by the first portion 211 and the first guide surface 141, it will be guided by the first portion 211 and the first guide surface 141, thereby improving the smoothness of gas flow; then, under the guiding action of the first portion 211 and the first guide surface 141, the gas will flow to contact the second portion 212, and under the guiding action of the second portion 212, the gas will flow to the first air outlet 12. Through the guidance of the gas by the second portion 212, the gas can flow to the first air outlet 12 more evenly, improving the smoothness of gas flow. By performing graded flow guidance of the gas through the first part 211 and the second part 212, the heat dissipation effect between the gas and the first heat dissipation shell 2 can be improved; and as the smoothness of the gas flow increases, the gas flow speed can also be faster, thereby accelerating the gas circulation speed and shortening the heat dissipation cycle.

[0066] In some specific embodiments, the flow guiding channel 4 includes a stabilizing zone 41 and a turbulent zone 42 that are interconnected along the radial direction of the motor. The inflow end of the turbulent zone 42 is connected to the first air inlet 11, and the cross-sectional shape of the turbulent zone 42 gradually decreases along the gas flow direction, driving the gas in the turbulent zone 42 to flow towards the end of the first heat sink 2 facing the mounting bracket 1, so as to guide the gas to the first heat sink 2, improve the heat dissipation effect of the gas on the first heat sink 2, and the turbulent zone 42 can guide the gas to form a smooth and consistent airflow. The outflow end of the stabilizing zone 41 is connected to the first air outlet 12. After the gas forms a smooth and consistent airflow from the turbulent zone 42, it flows to the stabilizing zone 41, and then flows to the first air outlet 12 under the guidance of the stabilizing zone 41. By classifying and guiding the gas through the turbulent flow zone 42 and the stable flow zone 41, the heat dissipation effect between the gas and the first heat dissipation shell 2 can be improved; and as the smoothness of the gas flow increases, the gas flow speed can also be faster, thereby accelerating the gas circulation speed and shortening the heat dissipation cycle.

[0067] In some specific embodiments, the mounting bracket 1 can be made of plastic material. The plastic mounting bracket 1 has excellent heat insulation performance, which can prevent the first heat sink 2 and the second heat sink 3 from conducting heat through the mounting bracket 1. This allows the heat generated by the controller 6 installed in the first heat sink 2 to be concentrated in the first heat sink 2, and the heat generated by the motor 7 in the second heat sink 3 to be concentrated in the second heat sink 3, thus preventing heat dispersion. Then, the first heat sink 2 and the second heat sink 3 are cooled by the gas flowing through them.

[0068] Further reference Figure 2 and Figure 3 The first heat dissipation housing 2 can be a controller housing, and the first heat dissipation housing 2 has a receiving cavity 23 for accommodating the controller 6. The heat generated by the controller 6 located in the receiving cavity 23 is conducted to the first heat dissipation housing 2, and then dissipated by the gas flowing in the guide channel 4, thereby achieving heat dissipation for the controller 6. Preferably, to improve the sealing effect of the controller 6, one end of the first heat dissipation housing 2 facing the guide channel 4 is a fully sealed structure, and the receiving cavity 23 is sealed and separated from the guide channel 4 by the first heat dissipation housing 2, improving the sealing performance of the controller 6, and allowing the heat generated by the controller 6 to be concentrated in the first heat dissipation housing 2 and dissipated through the first heat dissipation housing 2.

[0069] The connecting cavity formed by the first heat sink 2 can be connected to the outside on the side away from the flow channel 4. In order to improve the sealing performance of the controller 6, the first heat sink 2 can be connected to a controller end cover 24. The controller end cover 24 is placed on the controller 6 and abuts against the first heat sink 2. The controller end cover 24 can separate the connecting cavity of the first heat sink 2 from the outside to improve the sealing performance of the controller 6. The controller end cover 24 and the first heat sink 2 together form an installation chamber for housing the controller 6.

[0070] The second heat dissipation housing 3 can be a stator housing. A motor component 7 is housed within the second heat dissipation housing 3. The heat generated by the motor component 7 is conducted to the second heat dissipation housing 3, and then dissipated through the gas flowing through it, thus achieving heat dissipation for the motor component 7. To facilitate heat conduction, the first heat dissipation housing 2 and the second heat dissipation housing 3 can both be made of metals with good thermal conductivity. It should be noted that in other embodiments, the first heat dissipation housing 2 can be a stator housing, and the second heat dissipation housing 3 can be a controller housing; in this embodiment, the first heat dissipation housing 2 is used as the controller housing, and the second heat dissipation housing 3 is used as the stator housing for illustration.

[0071] Further reference Figure 5 and Figure 7In some specific embodiments, the first heat dissipation housing 2 has multiple heat dissipation ribs 22 protruding from the end facing the mounting bracket 1. For example, the heat dissipation ribs 22 protrude from the second guide surface 21 of the first heat dissipation housing 2 towards the mounting bracket 1. The sidewalls of two adjacent heat dissipation ribs 22 form an independent branch flow path, which forms part of the guide channel 4. Each branch flow path can connect the first air inlet 11 and the first air outlet 12. When gas flows into the guide channel 4, it flows over the surface of the multiple heat dissipation ribs 22. Therefore, the arrangement of the heat dissipation ribs 22 can increase the contact area between the first heat dissipation housing 2 and the gas, thereby improving the heat dissipation effect of the first heat dissipation housing 2. Preferably, the multiple heat dissipation ribs 22 are evenly distributed; for example, when the outer periphery of the first heat dissipation housing 2 is circular, the multiple heat dissipation ribs 22 can be arranged in an array around the axial direction of the first heat dissipation housing 2.

[0072] The end face of the heat dissipation rib 22 can be contoured to the first guide surface 141. Specifically, the end of the heat dissipation rib 22 facing the first guide surface 141 has a similar shape to the first guide surface 141, so that the distance between the heat dissipation rib 22 and the first guide surface 141 along the motor axis is the same or substantially the same. By contouring the heat dissipation rib 22 to the first guide surface 141, the heat dissipation rib 22 can extend towards the first guide surface 141 to the maximum extent, increasing the surface area of ​​the heat dissipation rib 22, thereby increasing the contact area between the heat dissipation rib 22 and the gas, and improving the heat dissipation effect of the first heat dissipation housing 2. In addition, by contouring the heat dissipation rib 22 to the first guide surface 141, the guiding effect of the heat dissipation rib 22 on the gas can also be improved, so that the gas is guided to flow along the extension direction of the guide channel 4.

[0073] The heat dissipation ribs 22 can be integrally formed with the second flow guide surface 21, and the heat dissipation ribs 22 can abut against the first flow guide surface 141 or be arranged close to the first flow guide surface 141, so that the gas in the adjacent branch flow path will not interfere or will only cause a small amount of interference, thereby avoiding or reducing the mutual interference of gas in the adjacent branch flow path and causing turbulence during gas flow, thus improving the smoothness of gas flow.

[0074] Further reference Figure 3The fan 5 generates power to guide the airflow from the first air outlet 12 towards the second heat sink 3, allowing the gas to flow sequentially along the first air inlet 11, the guide channel 4, and the first air outlet 12, and then sequentially through the first heat sink 2 and the second heat sink 3. Specifically, the fan 5 can be positioned on the side of the mounting bracket 1 facing the second heat sink 3, and the mounting bracket 1, the fan 5, and the second heat sink 3 are arranged at intervals along the motor axis. The fan 5 can be mounted on the rotating shaft of the motor component 7, allowing it to rotate synchronously with the shaft. The fan 5 has a second air inlet 52 and a second air outlet 53. The second air inlet 52 connects to the first air outlet 12 and can redirect the axially flowing airflow to radial flow before it exits through the second air outlet 53. The projection of the first air outlet 12 perpendicular to the radial direction covers the second air inlet 52, and the airflow from the first air outlet 12 flows into the second air inlet 52, ensuring that the airflow into the second air inlet 52 is always greater than or equal to a preset value.

[0075] Further reference Figure 9 In some specific embodiments, the fan 5 may include a connecting part 54, fan fins 55, a first fixing part 56, and a second fixing part 57. The connecting part 54, fan fins 55, first fixing part 56, and second fixing part 57 may be an integral structure. The connecting part 54 is fixedly connected to the rotating shaft of the motor component 7, so that the motor component 7 can drive the fan 5 to rotate through the connecting part 54. Multiple fan fins 55 are provided, arranged circumferentially on the connecting part 54, and spaced apart. A channel for gas flow is formed between adjacent fan fins 55. The channel formed between adjacent fan fins 55 extends radially, and gas flows in from the second air inlet 52 and is guided radially through the channel formed between adjacent fan fins 55. A first fixing part 56 and a second fixing part 57 are axially spaced on opposite sides of the fan fin portion 55. The first fixing part 56 is arranged around the outer edge of the fan fin portion 55 and located on one side of the first air outlet 12, while the second fixing part 57 is arranged around the root of the fan fin portion 55. The notch between the first fixing part 56 and the connecting part 54 forms the second air inlet 52, and the notch between the outer edge of the first fixing part 56 and the outer edge of the second fixing part 57 forms the second air outlet 53. The second air inlet 52 is a horizontal opening, and the second air outlet 53 can be an inclined opening.

[0076] To facilitate the installation of the fan 5, an installation space for accommodating the fan 5 is formed between the flange 14 and the second heat sink 3. Specifically, an installation space for accommodating the fan 5 is formed between the first end face 142 of the flange 14 facing the second heat sink 3 and the second heat sink 3, and the depth of the installation space along the motor axis can be greater than the height of the fan 5, so that the flange 14, the fan 5 and the second heat sink 3 can be arranged sequentially at intervals along the motor axis.

[0077] Further reference Figure 8 and Figure 9 To guide the gas flowing from the first air outlet 12 toward the fan 5, a first protrusion 13 protruding toward the first fixing part 56 is provided on the mounting bracket 1 near the first air outlet 12. A corresponding second protrusion 51 is provided on the first fixing part 56. The first protrusion 13 is radially arranged around the outside of the second protrusion 51 and extends axially to be flush with or beyond the end face of the first protrusion 13, thus forming an airflow channel. The first protrusion 13 and the second protrusion work together to block the flow of gas along the radial direction of the motor, thereby allowing the gas to flow toward the fan 5 along the axial direction of the motor. The first protrusion 13 and the second protrusion 51 can be annular protrusions, and the axial directions of the first protrusion 13 and the second protrusion 51 can coincide with the axial direction of the fan 5. The first protrusion 13 can be specifically arranged around the periphery of multiple first air outlets 12, and the fan 5 can be provided with multiple second air inlets 52 for allowing gas to flow into the fan 5. The second protrusion 51 can be specifically arranged around the periphery of multiple second air inlets 52.

[0078] The end face of the first protrusion 13 facing the fan 5 is flush with the end face of the second protrusion 51 facing the mounting bracket 1. That is, the first protrusion 13 is radially arranged around the outside of the second protrusion 51 and extends axially to be flush with the end face of the first protrusion 13. Alternatively, the first protrusion 13 and the second protrusion 51 are at least partially stacked along the radial direction of the motor. That is, the first protrusion 13 is radially arranged around the outside of the second protrusion 51 and extends axially beyond the end face of the first protrusion 13. Therefore, the movement of gas along the radial direction of the motor at the position between the first air outlet 12 and the fan 5 is mostly blocked by the first protrusion 13 or the second protrusion 51. The first protrusion 13 and the second protrusion 51 work together to achieve a wicking effect, allowing almost all the gas to flow into the fan 5. The first protrusion 13 and the second protrusion 51 are spaced apart along the radial direction of the motor, and the second protrusion 51 can be closer to the inner side of the motor than the first protrusion 13.

[0079] To secure the mounting bracket 1 to the first heat sink housing 2 and the second heat sink housing 3, the mounting bracket 1 is provided with a first locking hole 16 and a second locking hole 17. The first locking hole 16 is located at the end of the mounting bracket 1 facing the first heat sink housing 2, for example, at the edge of the flange portion 14 of the mounting bracket 1. The first locking hole 16 can be used to securely connect the mounting bracket 1 to the first heat sink housing 2. Specifically, the first heat sink housing 2 is provided with a first mating hole that communicates with the first locking hole 16. When the first mating hole of the first heat sink housing 2 communicates with the first locking hole 16 of the mounting bracket 1, a locking element can be passed through the first mating hole and the first locking hole 16 and secured to the first heat sink housing 2 or the mounting bracket 1, for example, by threaded connection, thereby securing the first heat sink housing 2 to the mounting bracket 1. The locking element can be a screw.

[0080] The second locking hole 17 is located at the end of the mounting bracket 1 facing away from the first heat sink 2. For example, the second locking hole 17 is located at the end of the side wall 15 of the mounting bracket 1 facing away from the first heat sink 2. The second locking hole 17 can be used to achieve a fixed connection between the mounting bracket 1 and the second heat sink 3. Specifically, the second heat sink 3 is provided with a second mating hole that can communicate with the second locking hole 17. When the second mating hole of the second heat sink 3 communicates with the second locking hole 17 of the mounting bracket 1, a locking element can be passed through the second mating hole and the second locking hole 17 and fixedly connected to the second heat sink 3 or the mounting bracket 1, for example, by threaded connection, thereby achieving a fixed connection between the second heat sink 3 and the mounting bracket 1. The locking element can be a screw.

[0081] To enable the controller 6 in the motor to control the operation of the motor component 7, the motor component 7 is connected to a connector 71, which extends from the motor component 7 to connect with the controller 6. In existing motors, the connector 71 of the motor component 7 extends inside the motor, making it difficult to assemble and disassemble the connector 71, which in turn makes it difficult to assemble and disassemble the controller 6. To facilitate the disassembly of the connector 71, in this invention, after the connector 71 is connected to the motor component 7, it extends through the second heat sink 3 to the outside of the second heat sink 3, and then extends to the controller end cover 24 to connect with the controller 6.

[0082] Further reference Figures 1 to 3 In order to connect the connector 71 located on the outside of the controller end cover 24 to the controller 6 located inside the controller end cover 24, the controller end cover 24 may be connected with a conductor 711. The conductor 711 can pass through the controller end cover 24 and be electrically connected to the controller 6 located inside the controller end cover 24.

[0083] One end of the connector 71 can be connected to the motor component 7, and after being connected to the motor component 7, the connector 71 can extend to the outside of the first heat sink 2. When one end of the connector 71 extends to the outer shell of the first heat sink 2, it can be electrically connected to the connector 71 using a conductor 711. The conductor 711 can pass through the first heat sink 2 to extend into the first heat sink 2 and be electrically connected to the controller 6 located inside the first heat sink 2. At this time, the connector 71 can be electrically connected to the controller 6 through the conductor 711. The conductor 711 can include a head 7111 and a body 7112 that are connected to each other. The head 7111 of the conductor 711 is located on the outside of the first heat sink 2 and abuts against the connector 71 to achieve an electrical connection with the connector 71. The body 7112 of the conductor 711 passes through the first heat sink 2 and is located inside the first heat sink 2 to connect with the controller 6.

[0084] In some specific embodiments, the connector 71 can be detachably connected to the conductor 711. When it is necessary to remove the controller 6, the connector 71 can be separated from the conductor 711, thereby disconnecting the connector 71 from the controller 6, and then the controller 6 can be removed. When it is necessary to install the controller 6, the connector 71 and the conductor 711 are connected to achieve an electrical connection between the connector 71 and the controller 6. Specifically, one end of the connector 71 extending to the first heat sink 2 is located between the head 7111 of the conductor 711 and the first heat sink 2. Then, the conductor 711 presses the connector 71 against the first heat sink 2 and abuts against the connector 71, thereby achieving a connection between the connector 71 and the first heat sink 2. When it is necessary to separate the connector 71, the conductor 711 is loosened to release the clamping force applied by the conductor 711 to the connector 71, thereby separating the connector 71 from the conductor 711.

[0085] In some specific embodiments, the conductive element 711 is detachably connected to the first heat sink 2. When the controller 6 needs to be removed, the conductive element 711 can be separated from the first heat sink 2, thereby disconnecting the connector 71 from the controller 6, and then the controller 6 can be removed. When the controller 6 needs to be installed, the conductive element 711 is connected to the first heat sink 2 to achieve electrical connection between the connector 71 and the controller 6. Specifically, the first heat sink 2 is provided with a threaded hole for engaging with the conductive element 711. The main body 7112 of the conductive element 711 has an external thread. The main body 7112 of the conductive element 711 is placed in the threaded hole of the first heat sink 2 and threadedly connected to the first heat sink 2, thereby allowing the conductive element 711 to be detachably connected to the first heat sink 2.

[0086] In some other embodiments, the conductive element 711 can be detachably connected to the controller 6. When it is necessary to remove the controller 6, the conductive element 711 can be separated from the controller 6, thereby detaching the connection between the connector 71 and the controller 6, and then the controller 6 can be removed; when it is necessary to install the controller 6, the conductive element 711 can be connected to the controller 6 to achieve electrical connection between the connector 71 and the controller 6. Specifically, the controller 6 is provided with a threaded hole for mating with the conductive element 711, and the main body 7112 of the conductive element 711 has an external thread. The main body 7112 of the conductive element 711 is placed in the threaded hole of the controller 6 and threadedly connected to the controller 6, thereby allowing the conductive element 711 to be detachably connected to the controller 6.

[0087] In other embodiments, the connector 71 can be detachably connected to the conductor 711. Furthermore, the conductor 711 can be detachably connected to the first heat sink 2 and also detachably connected to the controller 6. When the controller 6 needs to be removed, the conductor 711 can be separated from both the controller 6 and the first heat sink 2, simultaneously releasing the clamping force applied to the connector 71, thereby separating the connector 71 from the conductor 711 and from the first heat sink 2. When the controller 6 needs to be installed, the conductor 711 is connected to the first heat sink 2, simultaneously pressing the connector 71 against the connector 71, thereby achieving an electrical connection between the connector 71 and the controller 6 through the conductor 711. Specifically, the conductor 711 can be a metal screw, and the connector 71 can include one or more connecting wires, which are electrically connected to both the conductor 711 and the motor component 7. These connecting wires can specifically be UVW wires.

[0088] In some specific embodiments, the first heat dissipation housing 2 includes a second main body housing 25 with one open end and a controller end cover 24 covering the second main body housing 25. The second main body housing 25 and the controller end cover 24 together form a receiving cavity for accommodating the controller 6. One end of the connecting wire in the connector 71 can extend to one side of the controller end cover 24, specifically to the side of the controller end cover 24 facing outward along the motor axis. The conductor 711 passes through the controller end cover 24 to be electrically connected to the controller 6 located inside the first heat dissipation housing 2. The controller end cover 24 may have a threaded hole for mating with the conductor 711.

[0089] The connecting wire is electrically connected to the motor component 7 located inside the second heat sink 3. The connecting wire then passes through the second heat sink 3 and extends to the outside of the second heat sink 3. The connecting wire then extends from the outside of the second heat sink 3 to the outside of the first heat sink 2. In this embodiment, the connecting wire is electrically connected to the motor component 7 located inside the second heat sink 3.

[0090] Further reference Figure 11 To seal the motor component 7, a sealing element 26 is provided at the connection between the connecting wire and the second heat sink 3. The sealing element 26 seals the connection between the connecting wire and the second heat sink 3, thereby preventing external impurities or moisture from entering the interior of the second heat sink 3 through this connection. Specifically, the second heat sink 3 has a notch 31 penetrating through it, which is sealed by the sealing element 26. The sealing element 26 also has a sealing hole 261 for the connecting wire to pass through, connecting the inner and outer sides of the second heat sink 3. When one end of the connecting wire is electrically connected to the motor component 7, the connecting wire passes through the sealing hole 261 of the sealing element 26 and extends to the outside of the second heat sink 3. The diameter of the sealing hole 261 of the sealing element 26 can be slightly smaller than the straight length of the connecting wire, allowing for an interference fit between the sealing hole 261 and the connecting wire, thus sealing the connection between the sealing element 26 and the connecting wire. The sealing element 26 can be made of a material with a certain degree of elasticity, such as rubber or plastic.

[0091] Further reference Figure 14 In some specific embodiments, in order to facilitate the sealing effect of the sealing member 26, the sealing member 26 is provided with an embedding groove 262, and the inner wall of the embedding groove 262 abuts against the inner and outer walls of the first main body shell 32 respectively, so as to increase the sealing area between the sealing member 26 and the first main body shell 32 and improve the sealing effect of the sealing member 26.

[0092] Further reference Figure 11 and Figure 12 In some specific embodiments, the second heat dissipation housing 3 includes a first main body housing 32 with one open end and a stator / rotor end cover 33 covering the opening of the first main body housing 32. The first main body housing 32 and the stator / rotor end cover 33 together form a receiving cavity for accommodating the motor component 7. The notch 31 can be formed in the first main body housing 32, specifically on the side of the first main body housing 32 adjacent to the stator / rotor end cover 33, so that the lead-out distance of the UVW lines of the stator / rotor component 11 is shorter. One end of the notch 31 can penetrate the first main body housing 32 along the motor axis and extend to the stator / rotor end cover 33. When the seal 26 is installed at the notch 31, along the motor axis, the stator / rotor end cover 33 and the first main body housing 32 are disposed on opposite sides of the seal 26, and the stator / rotor end cover 33 and the first main body housing 32 can clamp and fix the seal 26 so that the connection between the seal 26 and the stator / rotor end cover 33 and the first main body housing 32 is sealed, and the seal 26 can be fixed.

[0093] The controller 6 and motor component 7 in the motor are generally spaced apart along the motor axis. One end of the connecting wire is electrically connected to the motor component 7 and passes through the second heat sink 3 radially along the motor. To allow the connecting wire to extend toward the controller 6, the connecting wire can be bent after extending to the outside of the second heat sink 3, so that the connecting wire can extend toward the controller 6 along the motor axis. The portion of the connecting wire that is bent after extending to the outside of the second heat sink 3 can form a first bend 712.

[0094] After the connecting wire forms the first bend 712, due to the weight and elasticity of the connecting wire, the connecting wire may not be able to maintain the bending angle of the first bend 712. In order to make the connecting wire maintain the bending angle required for the first bend 712, a guide component 72 is provided on the side of the seal 26 facing the outside. The guide component 72 can be used to guide and maintain the bending angle of the first bend 712.

[0095] Specifically, the guide assembly 72 may include a connector 721 and a guide 722. The connector 721 is disposed on the side of the seal 26 facing outward, and the connector 721 is provided with a connection hole 7211 for a connecting wire to pass through. The connection hole 7211 can communicate with the sealing hole 261 of the seal 26, so that the connecting wire can extend further from the sealing hole 261 of the seal 26 into the connection hole 7211 of the connector 721.

[0096] A receiving space 723 is formed between the guide member 722 and the connector 721, communicating with the connection hole 7211 and used to accommodate the first bend 712. This receiving space 723 can communicate with the connection hole 7211 of the connector 721, so that the connecting wire can pass through the connection hole 7211 and extend into the receiving space 723 to bend and form the first bend 712. The guide member 722 can be pressed against the connecting wire to guide and maintain the bending angle of the first bend 712. Wherein, the included angle formed between the clamping end face 7221 of the guide member 722 and the connecting hole 7211 is the same as the bending angle of the first bending portion 712; for example, the connecting hole 7211 of the connector 721 can penetrate the connector 721 radially along the motor, and the clamping end face 7221 of the guide member 722 is parallel to the motor axis; when the connecting wire passes through the connecting hole 7211 radially along the motor, the connecting wire will change from extending radially along the motor to extending axially along the motor within the receiving space 723, and the part of the connecting wire extending axially along the motor will abut against the clamping end face 7221 of the guide member 722, so that the clamping end face 7221 of the guide member 722 guides the extension direction of the connecting wire, and the guide member 722 can apply clamping force to the connecting wire so that the connecting wire maintains the bending angle required by the first bending portion 712.

[0097] To achieve a fixed connection between the guide assembly 72 and the second heat sink housing 3, the guide assembly 72 further includes a first mounting member 724 and a second mounting member 725. The first mounting member 724 is used to lock the connector 721 to the second heat sink housing 3. For example, the first mounting member 724 passes through the connector 721 and is threadedly connected to the second heat sink housing 3, thereby fixing the connector 721 to the second heat sink housing 3. The guide member 722 is connected to the connector 721 via the second mounting member 725 and presses against the connecting wire. For example, the second mounting member 725 passes sequentially through the guide member 722, the receiving space 723, and the connector 721, and is threadedly connected to the second heat sink housing 3 or the seal 26, thereby fixing the guide member 722, the connector 721, and the second heat sink housing 3. The second mounting member 725 can also press against the guide member 722, thereby allowing the guide member 722 to apply a clamping force to the connecting wire located within the receiving space 723. The first mounting member 724 and the second mounting member 725 can each be a screw.

[0098] Further reference Figure 10 and Figure 11 In some specific embodiments, after the connecting wire forms the first bend 712, it extends along the motor axis. To further guide the connecting wire, the motor is provided with a guide channel 73 communicating with the outside world, and the guide channel 73 can extend along the motor axis. After the connecting wire forms the first bend 712, it can extend into the guide channel 73 and extend along the guide channel 73 toward the first heat dissipation housing 2. The extension direction of the first bend 712 of the connecting wire is consistent with the length direction of the guide channel 73.

[0099] In some specific embodiments, the end of the connecting wire near the first heat sink 2 is bent toward the first heat sink 2 to form a second bend 712. Specifically, the end of the connecting wire near the first heat sink 2 is bent from extending along the motor axis to extending radially along the motor, so that the end of the connecting wire used to connect with the controller 6 can extend to the side of the first heat sink 2 facing outward along the motor axis, and then the connecting wire can be electrically connected to the controller 6 through the conductor 711.

[0100] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An electric machine characterized in that, The mounting bracket (1) is provided with a first air inlet (11) communicated with the outside, and a first air outlet (12) communicated with the second heat dissipation shell (3), wherein a flow guide channel (4) is formed between the mounting bracket (1) and the first heat dissipation shell (2), the flow cross section of the flow guide channel (4) presents a decreasing trend along the airflow direction, the airflow flowing into the flow guide channel (4) through the first air inlet (11) is accelerated and then flows out through the first air outlet (12); The fan (5) is arranged on the side of the mounting bracket (1) facing the second heat dissipation shell (3), and the airflow flowing out of the first air outlet (12) is guided by the fan (5) to flow towards the second heat dissipation shell (3). The airflow at the first air inlet (11) flows into the flow guide channel (4) along the radial direction, and the airflow at the first air outlet (12) flows out of the flow guide channel (4) along the axial direction.

2. The electric machine of claim 1, wherein, The cross section of the first air inlet (11) perpendicular to the radial direction is smaller than the cross section of the flow guide channel (4) abutting the first air inlet (11), so that the flow guide channel (4) can receive all the airflow flowing in from the first air inlet (11); and the cross section of the first air inlet (11) perpendicular to the radial direction is larger than the cross section of the flow guide channel (4) abutting the first air outlet (12), so that the airflow in the flow guide channel (4) can be accelerated.

3. The electric machine of claim 1, wherein, The mounting bracket (1), the fan (5) and the second heat dissipation shell (3) are sequentially and spacedly arranged along the motor shaft.

4. The electric machine of claim 1, wherein, The fan (5) is arranged on the rotating shaft of the motor part (7) and rotates synchronously with the rotating shaft.

5. The electric machine of claim 1, wherein, The fan (5) has a second air inlet (52) and a second air outlet (53), the second air inlet (52) abuts the first air outlet (12) and can change the axial airflow flowing in to radial airflow flowing out through the second air outlet (53).

6. The electric machine of claim 1, wherein, The fan (5) includes a connecting part (54), a fan fin part (55), a first fixing part (56) and a second fixing part (57), 7. The electric machine of claim 6, wherein, The connecting part (54) is fixedly connected to the rotating shaft of the motor part (7); A plurality of fan fin parts (55) are arranged on the connecting part (54) in the circumferential direction; The first fixing part (56) and the second fixing part (57) are spacedly arranged on opposite sides of the fan fin part (55) in the axial direction, wherein the first fixing part (56) is annularly arranged at the outer edge of the fan fin part (55) and located on the side of the first air outlet (12), and the second fixing part (57) is annularly arranged at the root of the fan fin part (55). ​ The gap between the first fixed part (56) and the connecting part (54) forms the second air inlet (52), and the gap between the outer edge of the first fixed part (56) and the outer edge of the second fixed part (57) forms the second air outlet (53).

8. The electric machine of claim 7, wherein, The first air outlet (12) covers the second air inlet (52) in the projection perpendicular to the radial direction, so that the air inflow of the second air inlet (52) is greater than or equal to the preset value at any time.

9. The electric machine of claim 7, wherein, The mounting bracket (1) is provided with a first protrusion (13) protruding towards the first fixed part (56) near the first air outlet (12), and the first fixed part (56) is correspondingly provided with a second protrusion (51), the first protrusion (13) is annularly arranged on the outer side of the second protrusion (51) in the radial direction, and the end surface of the first protrusion (13) is flush with or beyond the end surface of the first protrusion (13) in the axial direction, to form a dousing flow channel.

10. The electric machine of claim 1, wherein, The mounting bracket (1) includes a flange part (14) located between the first heat dissipation shell (2) and the second heat dissipation shell (3) in the axial direction, and the flange part (14) and the first heat dissipation shell (2) form the flow guide channel (4). The flange part (14) and the second heat dissipation shell (3) form a mounting space for accommodating the fan (5).

11. The electric machine of claim 10, wherein, The middle position of the flange part (14) is hollowed out to form the first air outlet (12).

12. The electric machine of claim 10, wherein, The flange part (14) has a first flow guide surface (141) extending in the radial direction, the first heat dissipation shell (2) has a second flow guide surface (21) correspondingly arranged, and the included angle between the end surface projection perpendicular to the axis and the radial direction of the first flow guide surface (141) and the second flow guide surface (21) is an acute angle.

13. The electric machine of claim 12, wherein, The included angle between the end surface projection perpendicular to the axis and the radial direction of the first flow guide surface (141) and the second flow guide surface (21) is 10-15°.

14. The electric machine of claim 11, wherein, The second flow guide surface (21) of the first heat dissipation shell (2) facing the mounting bracket (1) is an inclined surface gradually inclined towards the mounting bracket (1) in the gas flow direction. The first flow guide surface (141) of the flange part (14) facing the first heat dissipation shell (2) is an inclined surface gradually inclined towards the first heat dissipation shell (2) in the gas flow direction.

15. The electric machine of claim 1, wherein, The flow guide channel (4) includes a steady flow zone (41) and a turbulent flow zone (42) in communication with each other in the radial direction, the inflow end of the turbulent flow zone (42) is in communication with the first air inlet (11), the outflow end of the steady flow zone (41) is in communication with the first air outlet (12), and the gas flow sequentially flows through the first air inlet (11), the turbulent flow zone (42), the steady flow zone (41) and the first air outlet (12).

16. The electric machine of claim 12, wherein, The first heat dissipation shell (2) is provided with a plurality of heat dissipation ribs (22) protruding from one end facing the mounting bracket (1), and the side walls of adjacent two heat dissipation ribs (22) form an independent branch flow path, and each branch flow path is in communication with the first air inlet (11) and the first air outlet (12).

17. The electric machine of claim 16, wherein, The end surface of the heat dissipation rib (22) is shaped with the first flow guide surface (141).

18. The electric machine of claim 15, wherein, The first heat dissipation shell (2) is provided with a receiving cavity (23) for accommodating the controller (6), and the receiving cavity (23) is sealed and separated from the flow guide channel (4).

19. The electric machine of claim 1, wherein, One end of the mounting bracket (1) facing the first heat dissipation shell (2) is provided with a first locking hole (16), and the first heat dissipation shell (2) and the mounting bracket (1) are fixedly connected through a locking member mounted in the first locking hole (16). The end of the mounting bracket (1) away from the first heat dissipation shell (2) is provided with a second locking hole (17), and the second heat dissipation shell (3) and the mounting bracket (1) are fixedly connected through a locking member mounted in the second locking hole (17).

20. The electric machine of claim 1, wherein, The mounting bracket (1) is made of plastic material, the first heat dissipation shell (2) and the second heat dissipation shell (3) are made of metal material, and the first heat dissipation shell (2) and the second heat dissipation shell (3) are arranged separately by the mounting bracket (1).

21. The electric machine of claim 19, wherein, Further comprising a connecting wire (71) connected with the motor (7), the first heat dissipation shell (2) is connected with a controller end cover (24), the first heat dissipation shell (2) and the controller end cover (24) form an installation cavity for accommodating the controller (6); one end of the connecting wire (71) extends to the controller end cover (24) and is connected with a connecting member (711), the connecting member (711) is electrically connected with the connecting wire (71), and is electrically connected with the controller (6) through the controller end cover (24).

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