CN116094235A - A coreless motor with heat dissipation function - Google Patents

Abstract

The invention discloses a hollow cup motor with heat dissipation function, and aims to provide a hollow cup motor with heat dissipation function which is beneficial to improve the heat dissipation speed. An outer cover is provided, one end of the outer cover is connected with the motor body and several air outlets are provided, and several air outlets are evenly distributed around the motor body, the other end of the outer cover is provided with an air inlet, and the outer cover is provided with an oil pump box and a cooling plate. There is a rotating shaft on the motor body, and a fan is detachably installed on the rotating shaft. The fan is located in the outer cover and corresponds to the air inlet. The cooling plate is located between the fan and the air inlet and is connected to the outer cover. One end of the cooling channel passes through the oil pump box and the cooling The inside of the plate communicates with the other end of the cooling channel. The beneficial effects of the present invention are: the hollow cup motor of the present invention, under the joint action of the fan and the oil, simultaneously dissipates heat inside and outside the motor body, increasing the heat dissipation speed.

Description

A coreless motor with heat dissipation function

technical field

The invention relates to the related technical field of a hollow cup motor, in particular to a hollow cup motor with a heat dissipation function.

Background technique

At present, the coreless motor breaks through the structure of the rotor structure of the traditional motor. It uses an ironless rotor, also called a coreless rotor. The coreless motor is used in medical treatment due to its high performance, high efficiency, and compact structure. Equipment, robots, small automation equipment and other fields have been greatly promoted and applied. However, because the current coreless motor is closed with the motor casing and end cover, the heat generated during the operation of the motor cannot be discharged in time, and can only be dissipated through the surface of the motor casing. The heat dissipation effect is not ideal, and the motor is prone to overheating, which affects the lifespan.

The Chinese patent number is CN212850139U, and the authorized announcement date is March 30, 2021. It discloses a small coreless motor with heat dissipation function, including a coreless motor and a heat dissipation mechanism. The bottom of the coreless motor is provided with grooves for heat dissipation. The mechanism is fixedly installed at the bottom of the hollow cup motor. The heat dissipation mechanism includes a box, a solid plate, several elastic columns, several round grooves, a mounting plate, two fans and several round holes. The outer wall of the solid plate is fixed Installed on the top of the box body, several elastic columns are fixedly installed on the top of the solid plate, and several circular grooves are opened on the top of the solid plate. This kind of coreless motor with heat dissipation function is provided with a heat dissipation mechanism at the bottom of the coreless motor. Two fans and several round holes are arranged in the heat dissipation mechanism. The hot air in the cup motor is discharged to dissipate heat inside the coreless motor and protect the components of the coreless motor.

It can be seen from the above patents that in order to promote the heat dissipation of the motor, generally only a fan is used to dissipate heat from the motor, so that the heat dissipation effect is limited and the heat dissipation speed is average.

Contents of the invention

The purpose of the invention is to overcome the general deficiency of the heat dissipation speed of the motor in the prior art, and provide a hollow cup motor with heat dissipation function which is beneficial to improve the heat dissipation speed.

In order to achieve the above object, the present invention adopts the following technical solutions:

A coreless motor with heat dissipation function, which includes a motor body, a cooling passage is arranged in the motor body, an outer cover is provided at the end of the motor body, one end of the outer cover is connected with the motor body and several Air outlet, several air outlets are evenly distributed around the motor body, the other end of the outer cover is provided with an air inlet, the outer cover is provided with an oil pump box and a cooling plate, the motor body is provided with a rotating shaft, and the rotating shaft A fan is detachably installed on the cover, and the fan is located in the outer cover and corresponds to the air inlet. The cooling plate is located between the fan and the air inlet and is connected with the outer cover. One end of the cooling channel passes through the oil pump box and the cooling plate in turn. The interior communicates with the other end of the cooling channel.

The motor body is provided with a cooling passage, and the end of the motor body is provided with a cover, and one end of the cover is connected to the motor body and is provided with several air outlets, and the several air outlets are evenly distributed around the motor body. The other end of the outer cover is provided with an air inlet, the outer cover is provided with an oil pump box and a cooling plate, the motor body is provided with a rotating shaft, and a fan is detachably installed on the rotating shaft, and the fan is located in the outer cover and is connected to the outer cover. The air inlet corresponds to the air inlet, the cooling plate is located between the fan and the air inlet and is connected to the outer cover, and one end of the cooling channel is connected to the other end of the cooling channel through the oil pump box and the inside of the cooling plate in turn. While the motor body is working, the rotating shaft drives the fan to rotate. On the one hand, the fan absorbs air from the air inlet and then dissipates heat from the outer surface of the motor body through the air outlet. On the other hand, the oil in the cooling channel dissipates heat to the inside of the motor body. , after the oil absorbs heat, it is pumped into the cooling plate under the action of the oil pump box; since the cooling plate is located between the fan and the air inlet, when the fan sucks air, the cold air has a heat dissipation effect on the oil in the cooling plate, making After the oil is cooled, it enters the cooling channel again and circulates in this way. Therefore, under the joint action of the fan and the oil, the coreless motor in the present invention dissipates heat from the inside and outside of the motor body at the same time, achieving the purpose of improving the heat dissipation speed.

As a preference, the cooling plate is connected to the air inlet, and the cooling plate is provided with several air inlet passages, and the several air inlet passages are evenly distributed on the cooling plate in a rectangular array, and the air inlet passes through the air inlet passage and the air inlet in sequence. The inside of the outer cover communicates with the air outlet, the cooling plate is provided with several capillary pipes, one side of the cooling plate is close to the fan, the other side of the cooling plate is far away from the fan, and several capillary pipes are cooled along the The side of the plate close to the fan is evenly distributed to the corresponding other side. One end of several capillary pipes is connected with the oil pump box, and the other end of several capillary pipes is connected with the cooling channel. The capillary pipe is composed of The S-shaped structure is formed by connecting several sections of straight pipes one after the other. The straight pipes are perpendicular to the air inlet passages. The several sections of straight pipes are evenly distributed along the height direction of the cooling plate and interlaced with each row of air inlet passages. When the fan sucks air from the air inlet, the cold air enters the outer cover from several air inlet channels at the same time, and then blows to the surface of the motor body through the air outlet, which is beneficial to the heat dissipation on the surface of the motor body; the oil after heat absorption enters several capillary tubes at the same time In the channel, it is beneficial to increase the heat dissipation area of the oil and improve the heat dissipation speed; at the same time, the capillary pipe is an S-shaped structure, which is beneficial to prolong the residence time of the oil in the cooling plate and improve the heat dissipation effect; several straight pipes are along the height direction of the cooling plate Evenly distributed and interlaced with each row of air inlet channels, so that the oil can conduct sufficient heat conduction with the cold air, further improving the heat dissipation effect.

As a preference, the cooling plate is provided with an oil inlet box and an oil outlet box, one side of the oil inlet box is detachably connected to the cooling plate and communicated with one end of several capillary pipes, and the oil inlet box corresponds to The other side of the tank is provided with an oil inlet pipe 1, the oil inlet box is detachably connected with the oil pump box through the oil inlet pipe 1, and one side of the oil outlet box is detachably connected with the cooling plate and connected with the other ends of several capillary pipes The other side corresponding to the oil outlet box is provided with an oil outlet pipe, and the oil outlet box is detachably connected to the side wall of the motor body through the oil outlet pipe and communicated with the cooling channel. Under the action of the oil pump box, the oil inlet box is convenient for pumping the oil in the oil inlet pipe 1 into several capillary pipes for cooling at the same time, and the oil outlet box is convenient for pumping the oil in several capillary pipes into the oil outlet pipe at the same time, through The oil outlet pipe enters the cooling channel to dissipate heat from the motor body.

Preferably, the oil pump box includes a box body, a driving gear and a driven gear, the box body is detachably connected to the end of the motor body, the fan is located between the box body and the cooling plate, and the rotating shaft passes through the box body Afterwards, it is detachably connected with the fan, the driving gear and the driven gear are both located in the box, the driving gear is detachably connected to the rotating shaft, and the driven gear meshes with the driving gear and is rotatably connected with the side wall of the box. One side of the box body is provided with an oil inlet, and the other side corresponding to the box body is provided with an oil outlet, and the oil inlet and the oil outlet are both connected to the meshing part of the driving gear and the driven gear. Correspondingly, the oil inlet communicates with one end of the cooling channel, and the oil outlet communicates with the inside of the cooling plate. While the motor body is working, the driving gear is driven to rotate synchronously through the rotating shaft, and the oil in the cooling channel that has absorbed heat enters the box through the oil inlet, and then through the meshing transmission of the driving gear and the driven gear, the oil is pumped into several Cooling is carried out in the root capillary pipe; the invention uses the power output by the motor body itself to provide power for the circulation of the oil without additional booster pumps, which is beneficial to saving energy and cost, and has a simple structure.

Preferably, the part of the rotating shaft penetrating through the box body is in sealing and rotational connection with the box body. It is beneficial to prevent the oil in the tank from seeping out.

Preferably, the motor body includes a casing, a stator and a rotor, the outside of the stator is sealed with the casing and a cooling groove is provided, the cooling channel is jointly formed by the cooling groove and the side wall of the casing, and the rotor is located at In the stator, one end of the rotor is provided with a power shaft, the rotor is rotationally connected with one end of the casing through the power shaft, one end of the power shaft is connected with the rotor, and the other end of the power shaft is suspended after penetrating the casing The shape is located outside the casing, the rotating shaft is connected to the other end of the rotor, and the rotor is rotationally connected to the other end of the casing through the rotating shaft. The cooling groove is set on the surface of the stator, which is conducive to heat dissipation inside the motor body; when the rotor is working, the power output is performed through the power shaft, and the shaft rotates synchronously, so that the power of the rotor itself can be used to drive the driving gear and the fan to rotate synchronously, which is convenient While dissipating heat, it is beneficial to save energy and space.

Preferably, the cooling grooves are distributed on the surface of the stator in a spiral shape, and the casing is provided with an oil inlet pipe 2, and one end of the oil inlet pipe 2 is detachably connected to the casing and communicated with one end of the cooling groove. The other end of the oil inlet pipe 2 passes through the outer cover and communicates with the oil inlet box through the oil pump box and the oil inlet pipe 2 in turn. One end of the oil outlet pipe is detachably connected with the casing and communicated with the other end of the cooling tank. The oil outlet pipe The other end passes through the outer cover and communicates with the oil outlet box. The cooling grooves are distributed on the surface of the stator in a spiral shape, which is convenient for comprehensive heat dissipation inside the motor body and increases the contact area between the motor body and the oil, thereby improving the heat dissipation effect.

Preferably, the part of the two oil inlet pipes penetrating through the outer cover is sealingly connected with the outer cover, and the part of the oil outlet pipe penetrating through the outer cover is sealingly connected with the outer cover. It is beneficial for the fan to suck air from the air inlet, and the cold air can be completely blown out from the air outlet, which is beneficial to improve the heat dissipation effect on the surface of the motor body.

Preferably, several evenly distributed fins are provided on the surface of the casing, the fins are parallel to the longitudinal direction of the casing, and the fins are fixedly connected to the casing. The design of the fins is conducive to further improving the heat dissipation effect.

Preferably, several pieces of fins and several air outlets are arranged alternately at intervals around the casing to form an annular structure. This design makes the wind blown from the air outlet not only conducive to promoting heat dissipation on the surface of the casing, but also promotes rapid heat dissipation on the surface of the fins after absorbing heat.

The beneficial effects of the present invention are: the coreless motor in the present invention dissipates heat inside and outside the motor body simultaneously under the joint action of the fan and the oil, achieving the purpose of increasing the heat dissipation speed; it is beneficial to increase the heat dissipation area of the oil, and at the same time facilitate Prolonging the residence time of the oil in the cooling plate, the oil can conduct sufficient heat conduction with the cold air, further improving the heat dissipation effect; the invention can provide power for the circulation of the oil by using the power output by the motor body itself, without additional booster The pump is beneficial to save energy and cost at the same time, and the structure is simple; it is beneficial to prevent the oil in the box from seeping out; the cooling groove is distributed on the surface of the stator in a spiral shape, which is convenient for comprehensive heat dissipation inside the motor body, and improves the motor body and oil. The contact area is large, which is beneficial to improve the heat dissipation effect; the wind blown from the air outlet is not only beneficial to promote the heat dissipation on the surface of the casing, but also promotes the rapid heat dissipation on the surface of the fins after absorbing heat.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a schematic diagram of the internal structure of the present invention;

Fig. 3 is the right view of Fig. 1;

Fig. 4 is a schematic diagram of the longitudinal section structure of the cooling plate;

Fig. 5 is a schematic diagram of a transverse cross-sectional structure of a cooling plate;

Fig. 6 is a left side view of Fig. 1 .

In the figure: 1. Motor body, 2. Cooling channel, 3. Cover, 4. Air outlet, 5. Air inlet, 6. Oil pump box, 7. Cooling plate, 8. Rotating shaft, 9. Fan, 10. Air inlet channel , 11. capillary pipe, 12. straight pipe, 13. oil inlet box, 14. oil outlet box, 15. oil inlet pipe one, 16. oil outlet pipe, 17. box body, 18. driving gear, 19. driven gear, 20. Oil inlet, 21. Oil outlet, 22. Housing, 23. Stator, 24. Rotor, 25. Cooling tank, 26. Power shaft, 27. Two oil inlet pipes, 28. Fins.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

In the embodiment described in Figure 1 and Figure 2, a hollow cup motor with heat dissipation function, it includes a motor body 1, a cooling channel 2 is provided in the motor body 1, and an outer cover 3 is provided at the end of the motor body 1, One end of the outer cover 3 is connected to the motor body 1 and is provided with several air outlets 4, and the several air outlets 4 are evenly distributed around the motor body 1, and the other end of the outer cover 3 is provided with an air inlet 5, and an oil pump box is arranged inside the outer cover 3 6 and a cooling plate 7, the motor body 1 is provided with a rotating shaft 8, and a fan 9 is detachably installed on the rotating shaft 8, the fan 9 is located in the outer cover 3 and corresponds to the air inlet 5, and the cooling plate 7 is located between the fan 9 and the air inlet 5 One end of the cooling passage 2 communicates with the other end of the cooling passage 2 through the inside of the oil pump box 6 and the cooling plate 7 in turn.

As shown in Fig. 2, Fig. 3, Fig. 4 and Fig. 5, the cooling plate 7 is connected to the air inlet 5, and the cooling plate 7 is provided with several air inlet passages 10, and the several air inlet passages 10 are evenly distributed in a rectangular array in the cooling area. On the plate 7, the air inlet 5 communicates with the air outlet 4 through the air inlet passage 10 and the inside of the outer cover 3 in turn. The cooling plate 7 is provided with several capillary ducts 11. One side of the cooling plate 7 is close to the fan 9, and the cooling plate 7 The corresponding other side is far away from the fan 9, and several capillary pipes 11 are evenly distributed along the side of the cooling plate 7 close to the fan 9 to the corresponding other side, and one end of several capillary pipes 11 is connected with the oil pump box 6 , the other ends of several capillary pipes 11 are connected with the cooling passage 2, and the capillary pipe 11 is an S-shaped structure formed by connecting the ends of several straight pipes 12 sequentially. The straight pipes 12 are evenly distributed along the height direction of the cooling plate 7 and are distributed alternately with each row of air inlet channels 10 at intervals.

As shown in Figures 1 and 2, the cooling plate 7 is provided with an oil inlet box 13 and an oil outlet box 14, one side of the oil inlet box 13 is detachably connected to the cooling plate 7 and communicated with one end of several capillary pipes 11 , the other side corresponding to the oil inlet box 13 is provided with an oil inlet pipe 15, the oil inlet box 13 is detachably connected with the oil pump box 6 through the oil inlet pipe 15, and one side of the oil outlet box 14 is detachably connected with the cooling plate 7 and It communicates with the other end of several capillary pipes 11. The other side corresponding to the oil outlet box 14 is provided with an oil outlet pipe 16. The oil outlet box 14 is detachably connected to the side wall of the motor body 1 through the oil outlet pipe 16 and connected to the cooling channel. 2 phases are connected.

As shown in Figures 1 and 2, the oil pump box 6 includes a box body 17, a driving gear 18 and a driven gear 19, the box body 17 is detachably connected to the end of the motor body 1, and the fan 9 is located between the box body 17 and the cooling plate 7 Between, rotating shaft 8 is detachably connected with fan 9 after penetrating casing 17, driving gear 18 and driven gear 19 are all located in casing 17, driving gear 18 is connected with rotating shaft 8 detachably, driven gear 19 and driving gear 18 Mesh and rotatably connected with the side wall of the box body 17, one side of the box body 17 is provided with an oil inlet 20, and the other side of the box body 17 is provided with an oil outlet 21, the oil inlet 20 and the oil outlet 21 correspond to the meshing position of the driving gear 18 and the driven gear 19 , the oil inlet 20 communicates with one end of the cooling channel 2 , and the oil outlet 21 communicates with the inside of the cooling plate 7 . The part of the rotating shaft 8 passing through the box body 17 is in sealing and rotational connection with the box body 17 .

As shown in Figures 1 and 2, the motor body 1 includes a casing 22, a stator 23 and a rotor 24. The outside of the stator 23 is sealed with the casing 22 and is provided with a cooling groove 25. The cooling channel 2 is composed of the cooling groove 25 and the casing. 22 side walls constitute together, the rotor 24 is located in the stator 23, one end of the rotor 24 is provided with a power shaft 26, the rotor 24 is connected with one end of the casing 22 through the power shaft 26, one end of the power shaft 26 is connected with the rotor 24, and the power shaft The other end of 26 penetrates through the casing 22 and is suspended outside the casing 22. The rotating shaft 8 is connected with the other end of the rotor 24, and the rotor 24 is rotatably connected with the other end of the casing 22 through the rotating shaft 8.

As shown in Figures 1 and 2, the cooling groove 25 is distributed on the surface of the stator 23 in a spiral shape, and the casing 22 is provided with an oil inlet pipe 27, and one end of the oil inlet pipe 22 is detachably connected to the casing 22 and connected to the cooling groove 25. The other end of the oil inlet pipe 27 is connected with the oil inlet box 13 through the oil pump box 6 and the oil inlet pipe 27 after passing through the outer cover 3. One end of the oil outlet pipe 16 is detachably connected with the casing 22 and connected with the cooling tank The other end of 25 is communicated with, and the other end of oil outlet pipe 16 is communicated with oil outlet box 14 after passing through outer cover 3. The part of the oil inlet pipe 27 penetrating through the outer cover 3 is in sealing connection with the outer cover 3 , and the part of the oil outlet pipe 16 penetrating through the outer cover 3 is in sealing connection with the outer cover 3 .

As shown in FIG. 1 and FIG. 2 , several evenly distributed fins 28 are arranged on the surface of the casing 22 . The fins 28 and the length direction of the casing 22 are parallel to each other.

As shown in FIG. 6 , several fins 28 and several air outlets 4 are alternately arranged at intervals around the casing 22 to form an annular structure.

While the motor body 1 is working, the driving gear 18 and the fan 9 are driven to rotate synchronously through the rotating shaft 8; At the same time, it blows to the surface of the casing 22 and the fins 28, which is beneficial to the heat dissipation of the surface of the motor body 1; the oil in the cooling channel 2 enters the box body 17 through the oil inlet 20 through the oil inlet 20, and then passes through the driving gear 18 and the driven gear. 19 meshing transmission, the oil is pumped into several capillary pipes 11 and cooled by the cold air in the air inlet passage 10; after the oil is cooled, it enters the cooling passage 2 again and circulates in this way, so the hollow cup in the present invention Under the joint action of the fan 9 and the oil, the motor simultaneously dissipates heat inside and outside the motor body 1, thereby achieving the purpose of increasing the heat dissipation speed. The present invention utilizes the power output by the motor body 1 itself to provide power for the circulation of the oil without adding an additional booster pump, which is beneficial to energy saving and cost saving, and has a simple structure.

Claims (10)

1. The utility model provides a hollow cup motor with heat dissipation function, characterized by, including motor body (1), be equipped with cooling channel (2) in motor body (1), the tip of motor body (1) is equipped with dustcoat (3), the one end of dustcoat (3) is connected and is equipped with a plurality of air outlet (4) with motor body (1), and a plurality of air outlet (4) use motor body (1) as central evenly distributed, the other end of dustcoat (3) is equipped with air intake (5), be equipped with oil pump case (6) and cooling plate (7) in dustcoat (3), be equipped with pivot (8) on motor body (1), demountable installation has fan (9) on pivot (8), fan (9) are located dustcoat (3) and correspond with air intake (5), cooling plate (7) are located between fan (9) and air intake (5) and are connected with dustcoat (3), the one end of cooling channel (2) is linked together with cooling channel's other end and the inside of cooling channel (2) through oil pump case (6) and cooling plate (7) in proper order.

2. The hollow cup motor with the heat dissipation function according to claim 1, wherein the cooling plate (7) is connected with the air inlet (5), a plurality of air inlet channels (10) are arranged on the cooling plate (7), the plurality of air inlet channels (10) are uniformly distributed on the cooling plate (7) in a rectangular array, the air inlet (5) is sequentially communicated with the air outlet (4) through the air inlet channels (10) and the inside of the outer cover (3), a plurality of capillary channels (11) are arranged on the cooling plate (7), one side of the cooling plate (7) is close to the fan (9), the corresponding other side of the cooling plate (7) is far away from the fan (9), the plurality of capillary channels (11) are uniformly distributed along one side of the cooling plate (7) close to the fan (9) to the corresponding other side, one end of each capillary channel (11) is communicated with the oil pump box (6), the other end of each capillary channel (11) is sequentially communicated with the cooling channel (2), the capillary channels (11) are sequentially connected with the straight pipe sections (12) in a head-to-tail mode to form an S-shaped straight pipe (10), the straight pipes (12) are uniformly distributed along the height direction of the cooling plate (7) and are staggered with each travelling wind channel (10) at intervals.

3. The hollow cup motor with the heat dissipation function according to claim 2, wherein an oil inlet box (13) and an oil outlet box (14) are arranged on the cooling plate (7), one side of the oil inlet box (13) is detachably connected with the cooling plate (7) and is communicated with one ends of a plurality of capillary channels (11), an oil inlet pipe I (15) is arranged on the other side corresponding to the oil inlet box (13), the oil inlet box (13) is detachably connected with the oil pump box (6) through the oil inlet pipe I (15), one side of the oil outlet box (14) is detachably connected with the cooling plate (7) and is communicated with the other ends of the plurality of capillary channels (11), an oil outlet pipe (16) is arranged on the other side corresponding to the oil outlet box (14), and the oil outlet box (14) is detachably connected with the side wall of the motor body (1) through the oil outlet pipe (16) and is communicated with the cooling channel (2).

4. The hollow cup motor with the heat dissipation function according to claim 1, wherein the oil pump box (6) comprises a box body (17), a driving gear (18) and a driven gear (19), the box body (17) is detachably connected with the end part of the motor body (1), the fan (9) is located between the box body (17) and the cooling plate (7), the rotating shaft (8) penetrates through the box body (17) and then is detachably connected with the fan (9), the driving gear (18) and the driven gear (19) are located in the box body (17), the driving gear (18) is detachably connected with the rotating shaft (8), the driven gear (19) is meshed with the driving gear (18) and is rotatably connected with the side wall of the box body (17), one side of the box body (17) is provided with an oil inlet (20), the other side corresponding to the box body (17) is provided with an oil outlet (21), the oil inlet (20) and the oil outlet (21) are corresponding to the meshing place of the driving gear (18) and the driven gear (19), and the oil outlet (21) are communicated with one end of the cooling channel (7).

5. The hollow cup motor with the heat dissipation function according to claim 4, wherein the part of the rotating shaft (8) penetrating through the box body (17) is in sealing rotation connection with the box body (17).

6. A coreless motor with heat dissipation function according to claim 3, characterized in that, motor body (1) includes casing (22), stator (23) and rotor (24), the outside of stator (23) is equipped with cooling tank (25) with casing (22) sealing connection, cooling channel (2) are by cooling tank (25) and casing (22) lateral wall jointly constitute, rotor (24) are located stator (23), one end of rotor (24) is equipped with power shaft (26), rotor (24) are connected with one end rotation of casing (22) through power shaft (26), one end of power shaft (26) is connected with rotor (24), the other end of power shaft (26) is the unsettled form outside casing (22) after running through casing (22), pivot (8) are connected with the other end of rotor (24), rotor (24) are connected with the other end rotation of casing (22) through pivot (8).

7. The hollow cup motor with the heat dissipation function according to claim 6, wherein the cooling groove (25) is spirally distributed on the surface of the stator (23), an oil inlet pipe II (27) is arranged on the casing (22), one end of the oil inlet pipe II (27) is detachably connected with the casing (22) and is communicated with one end of the cooling groove (25), the other end of the oil inlet pipe II (27) penetrates through the outer cover (3) and then sequentially passes through the oil pump box (6) and the oil inlet pipe II (27) to be communicated with the oil inlet box (13), one end of the oil outlet pipe (16) is detachably connected with the casing (22) and is communicated with the other end of the cooling groove (25), and the other end of the oil outlet pipe (16) penetrates through the outer cover (3) and then is communicated with the oil outlet box (14).

8. The hollow cup motor with the heat dissipation function according to claim 7, wherein the part of the oil inlet pipe II (27) penetrating through the outer cover (3) is in sealing connection with the outer cover (3), and the part of the oil outlet pipe 16 penetrating through the outer cover (3) is in sealing connection with the outer cover (3).

9. The hollow cup motor with the heat dissipation function according to claim 6, wherein a plurality of fins (28) which are uniformly distributed are arranged on the surface of the machine shell (22), the fins (28) are parallel to the length direction of the machine shell (22), and the fins (28) are fixedly connected with the machine shell (22).

10. The hollow cup motor with the heat dissipation function as claimed in claim 9, wherein the fins (28) and the air outlets (4) are staggered at intervals with the casing (22) as a center to form an annular structure.

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