A heat dissipation mechanism, a motor applying the heat dissipation mechanism, and a manufacturing method of the motor

Abstract

The present application relates to a heat dissipation mechanism, which relates to the field of motors. It includes a housing having a cavity. The cavity of the housing is used to accommodate an electrical appliance and is isolated from the outside air. The cavity in the housing is filled with heat-conducting oil. The heat-conducting performance of the heat-conducting oil is higher than that of air, which can accelerate the transfer of heat from the electrical appliance to the housing, thereby playing a role in accelerating heat dissipation. In addition, the coefficient of thermal expansion of the heat-conducting oil is much lower than that of air. The volume of the heat-conducting oil expanded after heating is much smaller than the volume of air expanded after heating. The requirement for the space expansion amount in the housing is relatively small, and the housing only needs to undergo slight deformation to accommodate the heat-conducting oil after thermal expansion.

Description

Technical Field

[0001] The present application relates to the field of motors, and in particular, to a heat dissipation mechanism, a motor applying the heat dissipation mechanism, and a manufacturing method of the motor. Background Art

[0002] Most electrical appliances convert electrical energy into mechanical energy. However, the energy conversion cannot be 100% efficient, and part of the electrical energy will be converted into heat energy. When the components in the electrical appliance are directly exposed to the outside, they are easily damaged, so the components are often installed in the housing.

[0003] While the housing protects the components, it also hinders the heat generated by the components from flowing to the outside. In addition, it is difficult for the cavity inside the housing to perfectly match the components, and there is often a certain remaining space in the cavity inside the housing, which is filled with air. On the one hand, the thermal conductivity of air is not good, and the air between the components and the housing will interfere with the heat transfer from the components to the housing; on the other hand, the thermal expansion coefficient of air is large, and the volume of air will change greatly after being heated, which is harmful to the well-sealed housing. Summary of the Invention

[0004] In order to improve the heat dissipation capacity of the heat dissipation mechanism, the present application provides a heat dissipation mechanism, a motor applying the heat dissipation mechanism, and a manufacturing method of the motor.

[0005] In a first aspect, the present application provides a heat dissipation mechanism, adopting the following technical solution:

[0006] A heat dissipation mechanism includes a housing having a cavity. The cavity of the housing is used to accommodate the electrical appliance and is isolated from the outside air, and the cavity inside the housing is filled with heat-conducting oil.

[0007] By adopting the above technical solution, the thermal conductivity of the heat-conducting oil is higher than that of air, which can accelerate the heat transfer from the electrical appliance to the housing, thus playing a role in accelerating heat dissipation. In addition, the thermal expansion coefficient of the heat-conducting oil is much lower than that of air, and the pressure on the housing is limited, and it is not easy to cause damage to the housing.

[0008] Preferably, the bottom of the housing has a corrugated section and a deformation section. The deformation section is located in the middle of the bottom of the housing. The corrugated section is annular and surrounds the outside of the deformation section. The corrugated section undulates in a wave shape along the radial direction. When the temperature of the heat-conducting oil in the cavity rises, the deformation section expands towards the side away from the top of the housing.

[0009] By adopting the above technical solution, after the temperature inside the housing rises, the volume of the heat-conducting oil becomes larger. The deformation section is extruded by the heat-conducting oil and deforms outward to expand the cavity volume inside the housing, so as to meet the requirements of the heat-conducting oil for space change and reduce the pressure caused by the thermal expansion of the heat-conducting oil on the housing.

[0010] Preferably, the deformed section is recessed toward the inner cavity side of the housing.

[0011] By adopting the above technical solution, although the volume change of the heat-conducting oil is small after being heated and expanded, the overall volume of the heat-conducting oil will still increase. At this time, the deformed section is gradually restored from the concave state toward the cavity side to the normal state under the extrusion of the heat-conducting oil, so that the volume of the cavity becomes larger to meet the volume change of the heat-conducting oil. Even when the heat-conducting oil continues to expand, the deformed section continues to bulge out of the cavity, which helps to increase the upper limit of the maximum temperature allowed in the housing.

[0012] In a second aspect, the present application provides a motor, adopting the following technical solution:

[0013] A motor applying a heat dissipation mechanism includes a mounting plate wound with a coil, a main shaft coaxially connected to the mounting plate, and an annular permanent magnet sheet. The permanent magnet sheet is fixed on the inner side wall of the housing. A bracket is installed on the end of the permanent magnet sheet close to the bottom of the housing. One end of the main shaft is rotatably connected to the bracket through a bearing seat, and the other end of the main shaft is also rotatably connected to the top of the housing through a bearing. The mounting plate is located inside the inner ring of the permanent magnet sheet.

[0014] By adopting the above technical solution, the heat generated by the motor mainly comes from the energized coil. The coil is immersed in the heat-conducting oil, and the heat generated by the coil is directly transferred to the heat-conducting oil. The heat-conducting oil then transfers the heat to the inner wall of the housing with a relatively low temperature, and the housing then exchanges heat with the outside. The overall heat dissipation performance of the motor is good, and it can effectively inhibit the increase of the temperature inside the housing.

[0015] Preferably, a detection device for detecting whether there is a leak in the cavity is installed inside the housing, and a control box for controlling the opening and closing of the entire motor is provided outside the housing; the main shaft is a hollow shaft, a wire is connected to the output end of the detection device, and the end of the wire away from the detection device passes through the main shaft and is connected to the control box, and the main shaft is filled with sealant.

[0016] By adopting the above technical solution, when there is a problem with the sealing performance of the housing, the heat-conducting oil is likely to leak out when the housing rotates. The leakage of the heat-conducting oil will not only have a certain impact on the external environment but also interfere with the use of the motor. Therefore, it is necessary to detect through the detection device and turn off the motor in time.

[0017] Preferably, the permanent magnet sheet is the rotor of the motor, and a plurality of stirring blades are installed inside the housing, and the plurality of stirring blades are evenly distributed around the main shaft.

[0018] By adopting the above technical solution, the permanent magnet piece rotates to drive the shell to rotate, and the stirring blades installed on the shell rotate synchronously. During the rotation of the stirring blades, the heat transfer oil in the shell is driven to flow, so as to enhance the heat transfer between the heat transfer oils.

[0019] Preferably, the stirring blade is installed on the top of the shell, one side of the stirring blade is fixed on the shell, the other side of the stirring blade is close to the surface of the mounting plate away from the bracket, and the length direction of the stirring blade is the same as the radial direction of the shell.

[0020] By adopting the above technical solution, the space on the end face of the shell is much larger than that on the side wall of the shell, which is suitable for the installation of stirring blades. When the stirring blades rotate with the shell, the heat transfer oil in contact is driven to perform centrifugal motion. This part of the heat transfer oil is thrown to the circumferential side wall of the shell, and the heat transfer oil in the center of the shell is replenished to the stirring blades, thereby enhancing the heat dissipation effect of the heat transfer oil.

[0021] Preferably, the bracket and the mounting plate are both provided with a plurality of through holes for the heat transfer oil to pass through.

[0022] By adopting the above technical solution, the heat transfer oil in the second housing can flow into the second housing through the through hole, thereby increasing the flow amplitude of the heat transfer oil in the housing and further enhancing the heat dissipation effect of the heat transfer oil.

[0023] Preferably, the permanent magnet sheet is a stator of a motor, and a plurality of stirring blades are installed in the housing, wherein the stirring blades are evenly distributed around the main shaft and fixed on the circumferential outer side wall of the main shaft.

[0024] By adopting the above technical solution, the main shaft drives the mounting plate to rotate, and the stirring blades installed on the main shaft rotate synchronously. During the rotation of the stirring blades, the heat transfer oil in the shell is driven to flow, so as to enhance the heat transfer between the heat transfer oils.

[0025] In a third aspect, the present application provides a method for manufacturing a motor, using the following technical solution: A method for manufacturing a motor, comprising the following steps:

[0026] S1, according to the mounting plate and permanent magnet sheet wound with the coil, corresponding parts constituting the housing are manufactured;

[0027] S2, assembling the components into a housing, and during the assembly process of the housing, installing the mounting plate and the permanent magnet sheet into the housing;

[0028] S3, injecting heat transfer oil into the shell, and squeezing the bottom of the shell into the cavity to reduce the volume of the cavity in the shell to a minimum, then sealing the shell, and removing the heat transfer oil overflowing from the inner cavity of the shell.

[0029] By adopting the above technical solution, after refueling, the housing is sealed without the need to set an additional fuel injection port, ensuring that the air inside is completely discharged and there is no air inside the housing, while the bottom of the housing always maintains an elastic force towards the outside of the cavity, forming a state similar to negative pressure in the inner cavity of the housing.

[0030] In summary, the present application includes at least one of the following beneficial technical effects:

[0031] 1. The housing is filled with heat-conducting oil with strong thermal conductivity and low coefficient of thermal expansion, enhancing the heat dissipation effect and reducing the volume of expansion after heating;

[0032] 2. By means of the rotation of the rotor of the motor, the stirring blades are driven to rotate, making the heat-conducting oil in the housing flow, further enhancing the heat dissipation effect;

[0033] 3. During the assembly process, the bottom of the housing is inwardly squeezed to reduce the space inside the housing cavity, and on this basis, the amount of heat-conducting oil in the housing is determined, enabling the heat-conducting oil to have a larger deformation space in subsequent work. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 is a schematic diagram of the overall structure of an embodiment of the heat dissipation mechanism of the present application.

[0035] Figure 2 is an exploded view of the structure of an embodiment of the heat dissipation mechanism of the present application.

[0036] Figure 3 is a schematic diagram of the structure of the first housing of the first embodiment of the motor of the present application.

[0037] Figure 4 is a cross-sectional view of the first embodiment of the motor of the present application.

[0038] Figure 5 is Figure 4 an enlarged view of A in

[0039] Figure 6 is a structural connection diagram between the mounting plate and the main shaft of the first embodiment of the motor of the present application.

[0040] Figure 7 is a structural connection diagram between the permanent magnet piece and the bracket of the first embodiment of the motor of the present application.

[0041] Figure 8 is a schematic diagram of the structure of the second housing of the first embodiment of the motor of the present application.

[0042] Figure 9 is a schematic diagram of the structure of the main shaft of the second embodiment of the motor of the present application.

[0043] Description of reference numerals: 01, housing; 011, first cover; 0111, corrugated section; 0112, deformation section; 0113, connection section; 012, second cover; 0121, sleeve; 013, washer; 02, sealing ring; 03, mounting plate; 04, permanent magnet piece; 041, bracket; 05, main shaft; 06, bearing; 07, mechanical seal; 08, stirring blade; 09, control box; 10, detection device; 101, reed switch; 102, permanent magnet; 11, through hole; 12, wire. Detailed implementation manners

[0044] The following further describes the present application in conjunction with Figures 1-9 drawings.

[0045] An embodiment of the present application discloses a heat dissipation mechanism. Refer to Figure 1 , which includes a housing 01. A cavity is provided in the housing 01. A sleeve 0121 is welded to one end of the housing 01. The cavity in the housing 01 communicates with the outside through the sleeve 0121. During use, an electrical appliance is installed in the housing 01, and the housing 01 protects the electrical appliance. Then, heat-conducting oil is added into the cavity of the housing 01 through the sleeve 0121, and then a sealing member is installed in the sleeve 0121. The sealing member isolates the cavity of the housing 01 from the outside. And after the sealing member is installed, the remaining space in the cavity is filled with heat-conducting oil.

[0046] Refer to Figure 2 and Figure 3 , the housing 01 includes a first cover 011 and a second cover 012. The sleeve 0121 is welded to the second cover 012. Both the first cover 011 and the sleeve 0121 are made of stainless steel, while the second cover 012 is made of brass. Compared with stainless steel, brass has better heat conduction performance and ductility. The first cover 011 is successively divided into a deformation section 0112, a corrugated section 0111, and a connection section 0113 from the center to the outside.

[0047] The overall shape of the corrugated section 0111 is annular and surrounds the outside of the deformation section 0112. The corrugated section 0111 undulates in a wave shape in the radial direction. With the structure of the corrugated section 0111, when the deformation section 0112 is subjected to pressure, the corrugated section 0111 can expand, enabling the deformation section 0112 to deform along the direction of the pressure. At normal temperature, the deformation section 0112 depresses into the cavity, minimizing the space in the cavity. When the temperature of the heat-conducting oil in the cavity rises, the deformation section 0112 gradually expands towards the side away from the top of the housing 01, increasing the space in the cavity and providing a deformation space for the thermal expansion of the heat-conducting oil in the cavity.

[0048] The connecting section 0113 is bent towards the second housing 012 relative to the corrugated section 0111, and a plurality of circular holes for bolts to pass through are evenly arranged along the circumference at one end of the connecting section 0113 away from the corrugated section 0111. The second housing 012 is also provided with circular holes corresponding one by one to the circular holes on the first housing 011, and the first housing 011 and the second housing 012 are fixed together through the cooperation of bolts and nuts. In order to enhance the sealing performance of the housing 01, a sealing ring 02 is placed between the first housing 011 and the second housing 012. As the nut is tightened on the bolt, the first housing 011 and the second housing 012 squeeze the sealing ring 02, and the deformed sealing ring 02 blocks the gap between the first housing 011 and the second housing 012. In addition, in order to prevent the first housing 011 from deforming due to local stress when tightening the bolts, a washer 013 made of stainless steel is sleeved on the first housing 011 again.

[0049] The implementation principle of a heat dissipation mechanism in an embodiment of the present application is as follows: The inner cavity of the housing 01 is filled with heat-conducting oil so that there is no air left in the housing 01. The heat-conducting performance of the heat-conducting oil is higher than that of air, which can accelerate the transfer of heat from the electrical appliance to the housing 01, thereby playing a role in accelerating heat dissipation. In addition, the coefficient of thermal expansion of the heat-conducting oil is much lower than that of air. At the same temperature rise, the volume change of the heat-conducting oil is limited, and the second housing 012 can meet the requirements of the heat-conducting oil for space change through deformation. Therefore, the housing 01 can be completely sealed, reducing the leakage of the heat-conducting oil and also protecting the electrical appliances in the housing 01 from external erosion.

[0050] An embodiment of the present application also discloses a motor that applies the above heat dissipation mechanism.

[0051] Embodiment 1: Refer to Figure 4 , including a mounting disk 03 wound with coils, a main shaft 05 coaxially connected to the mounting disk 03, a control box 09 containing components, and an annular permanent magnet piece 04. Among them, the control box 09 is outside the housing 01, while the mounting disk 03 and the permanent magnet piece 04 are both installed in the inner cavity of the housing 01, and the central axes of the mounting disk 03 and the permanent magnet piece 04 are on the same straight line as the central axis of the housing 01. A part of the permanent magnet piece 04 is inside the first housing 011, and the outer side wall of this part of the permanent magnet piece 04 is welded to the inner wall of the second housing 012, and another part of the permanent magnet piece 04 is inside the first housing 011. A bracket 041 is welded on the end face of the permanent magnet piece 04 inside the first housing 011, and a bearing 06 is installed at the center of the bracket 041. A bearing 06 is also installed inside the sleeve 0121, and the two ends of the main shaft 05 are respectively rotationally connected to the bearings 06 on the sleeve 0121 and the bearings 06 on the bracket 041.

[0052] Refer to Figure 4 、 Figure 6, the main shaft 05 is a hollow shaft. The end of the coil wound on the mounting disc 03 is connected to a wire 12. The wire 12 penetrates into the main shaft 05 and is connected to the control box 09 along the main shaft 05. The user can control the on-off of the coil by controlling the components in the control box 09, thereby controlling the start and stop of the entire motor. In addition, in order to prevent external air from affecting the sealing of the inner cavity of the housing 01, the main shaft 05 is filled with sealant.

[0053] See Figure 5 , a detection device 10 for detecting whether there is a leak in the cavity is also installed in the housing 01. The detection device 10 can be a reed switch or a travel switch. Any switch that can change the signal according to the change of distance can be used as the detection device 10. In this application, a reed switch is taken as an example. The reed switch includes a dry reed tube 101 with two reed pieces installed and a permanent magnet 102. The permanent magnet 102 is fixed at the central position of the deformation section 0112 facing the second housing 012. The dry reed tube 101 is located inside the main shaft 05 and at the end of the main shaft 05 close to the first housing 011. A wire 12 is also connected to the dry reed tube 101, and the wire 12 on the dry reed tube 101 is connected to the control box 09 along the main shaft 05. At normal temperature, the cavity of the housing 01 is in a negative pressure state, and the deformation section 0112 is slightly recessed inward, so that the permanent magnet 102 is close to the dry reed tube 101, and the two reed pieces in the dry reed tube 101 are in contact with each other under the action of the magnetic field, and the reed switch is in a connected state, and the control box 09 can normally control the opening and closing of the motor. When the temperature in the cavity of the housing 01 rises, because the expansion coefficient of the heat-conducting oil is low, the volume change of the heat-conducting oil after expansion is limited, and the deformation section 0112 will not show obvious deformation, and the distance between the permanent magnet 102 and the dry reed tube 101 is still within the magnetic field influence range of the permanent magnet 102. Only when there is a problem with the sealing of the housing 01 and external air enters the housing 01, the large expansion coefficient of the air causes obvious deformation of the deformation section 0112, and the influence of the permanent magnet 102 on the dry reed tube 101 can no longer make the reed pieces contact, and the two reed pieces in the dry reed tube 101 no longer contact, thereby cutting off the power supply of the control box 09 and immediately turning off the power of the motor to reduce the continuous leakage of the heat-conducting oil in the housing 01 to the outside.

[0054] In this embodiment, the motor is an outer-rotor motor, and the motor can be applied to an aerator. The housing 01 and the permanent magnet piece 04 together form the rotor of the motor, and the end of the main shaft 05 extending from the sleeve 0121 out of the housing 01 will be fixed by an external support frame. In addition to being used for the fastening of bolts, the corresponding round holes between the first housing 011 and the second housing 012 can also be used for the installation of the aerator blades. As the permanent magnet piece 04 drives the housing 01 to rotate, the aerator blades can also rotate accordingly.

[0055] In addition, see Figure 4 、 Figure 8, several stirring blades 08 are welded to the inner side of the top of the second housing 012. The several stirring blades 08 are evenly distributed around the bearing 06 on the second housing 012, and the length direction of the stirring blades 08 is the same as the radial direction of the second housing 012. Combined with Figure 7 , a plurality of through holes 11 for the heat-conducting oil to pass through are provided on both the support 041 and the mounting plate 03. The through holes 11 on the support 041 correspond to the through holes 11 on the mounting plate 03 one by one.

[0056] The working principle of a motor in an embodiment of the present application: When the motor is working, the coil is energized to generate a magnetic field and acts on the permanent magnet piece 04. Since the main shaft 05 is fixed, the permanent magnet piece 04 will rotate. The entire housing 01 rotates together with the permanent magnet piece 04, the stirring blades 08 rotate synchronously, and the heat-conducting oil in the second housing 012 is stirred and flows toward the side wall of the housing 01, while the heat-conducting oil in the first housing 011 is replenished into the second housing 012 through the through holes 11, so that the heat-conducting oil forms a circulating flow, strengthening the heat transfer effect. At the same time, the first housing 011 is in contact with the external water, which can more conveniently perform heat exchange, so that the temperature in the housing 01 is controlled within a reasonable range. For a permanent magnet motor, temperature has a great influence on performance. Only when it works within a reasonable temperature range can the performance of the permanent magnet motor be better exerted.

[0057] Embodiment 2: Refer to Figure 9 , the difference between this embodiment and Embodiment 1 is that the motor is an inner-rotor motor, the main shaft 05 of the motor drives the mounting plate 03 to rotate, and the permanent magnet piece 04 and the housing 01 do not rotate. At the same time, a plurality of stirring blades 08 are fixed on the circumferential outer side wall of the main shaft 05. The plurality of stirring blades 08 are evenly distributed around the main shaft 05, and the plurality of stirring blades 08 are all located between the first housing 011 and the mounting plate 03. The motor in this embodiment can still be applied to an aerator. At this time, the aerator blades will be driven by the main shaft 05 to rotate, and the housing 01 of the motor is used to be fixed on an external support frame.

[0058] The present application also discloses a manufacturing method of a motor, including the following steps:

[0059] S1, complete the manufacturing of the components for assembling the motor.

[0060] The mounting plate 03 needs to be wound with coils and then installed together with the main shaft 05. The wire 12 on the mounting plate 03 penetrates into the inner cavity of the main shaft 05, and a detection module is installed at one end of the main shaft 05. A wire 12 is also connected to the output end of the detection module. The two wires 12 together pass through the end of the main shaft 05 far from the detection module, and then the remaining space in the main shaft 05 is blocked with sealant. The permanent magnet piece 04 and the support 041 are welded together. The first housing 011 and the second housing 012 are both processed according to the sizes of the mounting plate 03 and the permanent magnet piece 04, and a sleeve 0121 is welded to the second housing 012.

[0061] S2, Assemble the components into a motor.

[0062] First, install two bearings 06 onto the sleeve 0121 and the bracket 041 respectively. Then, place the mounting plate 03 and the main shaft 05 together into the second housing 012 from the open end of the second housing 012. The end of the main shaft 05 passes through the end of the wire 12 and enters the sleeve 0121 and is rotatably connected to the bearing 06 at the corresponding end. Continue to install the permanent magnet pieces 04 onto the second housing 012. The end of the permanent magnet piece 04 away from the bracket 041 is embedded into the second housing 012, and the other end of the main shaft 05 is inserted into the bearing 06 of the bracket 041. After adjustment and stabilization, weld the permanent magnet piece 04 onto the second housing 012. Then, put a sealing ring 02 over the permanent magnet piece 04, and install the first housing 011 and the washer 013 in sequence. Connect the first housing 011 and the second housing 012 together by using the cooperation of bolts and nuts with a circular hole interval.

[0063] S3, Inject heat-conducting oil into the housing 01, and squeeze the bottom of the housing 01 into the cavity to minimize the volume of the cavity in the housing 01. Then, use a mechanical seal 07 to seal the sleeve 0121, and remove the heat-conducting oil that overflows from the inner cavity of the housing 01.

[0064] The above are all the preferred embodiments of this application, and do not limit the protection scope of this application accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A motor, characterized in that: it includes a heat dissipation mechanism, a mounting disk (03) wound with a coil, a main shaft (05) coaxially connected to the mounting disk (03), and an annular permanent magnet sheet (04). The heat dissipation mechanism includes a housing (01) with a cavity. The housing (01) includes a first cover shell (011) and a second cover shell (012) located above the first cover shell (011). The cavity of the housing (01) is used to accommodate an electrical appliance and is isolated from the outside air. The cavity of the housing (01) is filled with heat-conducting oil. The bottom of the housing (01) has a corrugated section (0111) and a deformation section (0112). The deformation section (0112) is located at the middle position of the bottom of the housing (01). The corrugated section (0111) is annular and surrounds the outside of the deformation section (0112). The corrugated section (0111) undulates in a wavy shape in the radial direction. A control box (09) for controlling the opening and closing of the entire motor is provided outside the housing (01); the main shaft (05) is a hollow shaft. A wire (12) is connected to the output end of a detection device (10). The end of the wire (12) far from the detection device (10) passes through the main shaft (05) and is connected to the control box (09). The inside of the main shaft (05) is filled with sealant. A detection device (10) is provided inside the housing (01). The detection device (10) is a magnetic reed switch. The magnetic reed switch includes a dry reed tube (101) equipped with two reed pieces and a permanent magnet (102). The permanent magnet (102) is fixed at the central position of the deformation section (0112) facing the second cover shell (012). The dry reed tube (101) is located inside the main shaft (05) and at the end of the main shaft (05) close to the first cover shell (011). A wire (12) is also connected to the dry reed tube (101). The wire (12) on the dry reed tube (101) is connected to the control box (09) along the main shaft (05). At normal temperature, the deformation section (0112) is recessed toward the inner cavity side of the housing (01). When the temperature of the heat-conducting oil in the cavity rises, the deformation section (0112) expands toward the side away from the top of the housing (01). The permanent magnet sheet (04) is fixed on the inner side wall of the housing (01). A bracket (041) is installed at the end of the permanent magnet sheet (04) close to the bottom of the housing (01). One end of the main shaft (05) is rotatably connected to the bracket (041) through a bearing (06) seat, and the other end of the main shaft (05) is also rotatably connected to the top of the housing (01) through a bearing (06). The mounting disk (03) is located inside the inner ring of the permanent magnet sheet (04).

2. The motor according to claim 1, characterized in that: the permanent magnet sheet (04) is the rotor of the motor, and a plurality of stirring blades (08) are installed inside the housing (01). The plurality of stirring blades (08) are evenly distributed around the main shaft (05).

3. The motor according to claim 2, characterized in that: The stirring blade (08) is installed on the top of the housing (01). One side edge of the stirring blade (08) is fixed to the housing (01), and the other side edge of the stirring blade (08) is close to the surface of the mounting disc (03) facing away from the bracket (041). The length direction of the stirring blade (08) is the same as the radial direction of the housing (01).

4. The motor according to claim 1, characterized in that: A plurality of through holes (11) for the passage of heat-conducting oil are provided on both the bracket (041) and the mounting disc (03).

5. The motor according to claim 1, characterized in that: The permanent magnet sheet (04) is the stator of the motor. A plurality of stirring blades (08) are installed in the housing (01), and the plurality of stirring blades (08) are evenly distributed around the main shaft (05) and fixed on the circumferential outer side wall of the main shaft (05).

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