Water-cooled heat dissipation type energy-saving hub motor

Abstract

The invention relates to the technical field of hub motors, and provides a water-cooled heat dissipation type energy-saving hub motor, which comprises a water drawing mechanism and a motor main body, and can convey cooling water into a fixed rotating ring through the water drawing mechanism while the hub motor drives a wheel to rotate and walk. In the rotating process of a cover plate on a hub motor, a wheel disc can be driven to rotate through a connecting rod, so that the wheel disc and an impeller can rotate on the outer wall of a connecting shaft, the impeller rotating at a high speed can suck a water conveying pipe through a water drawing cover, and cooling water can be conveyed into a cavity formed by an outer cover and the wheel disc through the water conveying pipe; the impeller rotating at a high speed discharges cooling water on the inner side of the outer cover into the right-angle water inlet pipe, the cooling water is conveyed into the shell and the end cover of the hub motor through the right-angle water inlet pipe, water cooling treatment is carried out on the hub motor, power equipment does not need to be additionally arranged for pumping circulating water, and the water cooling device is simple in overall structure, ingenious in design and high in use value.

Description

Technical Field

[0001] The present invention relates to the technical field of wheel hub motors, and in particular to a water-cooled, heat-dissipating, energy-saving wheel hub motor. Background Art

[0002] In recent years, two-wheeled electric vehicles have developed rapidly in China, especially in smaller third- and fourth-tier cities and rural areas, where they have become an important means of transportation for road traffic. Electric vehicles are favored by consumers for their low cost, convenience, environmental protection, and easy operation. As a key component in the industrial chain, the status quo and development trend of electric bicycle hub motors are both positive. In the future, with the continuous advancement of technology and the continuous expansion of the market, the electric bicycle hub motor industry will usher in a broader development prospect.

[0003] For hub motors, after long-term use, the temperature of the main heat-generating areas such as the winding, stator and rotor rises sharply, and the heat generation increases, which deteriorates the working conditions inside the motor. When the heat inside the motor cannot be effectively dissipated, there are many adverse effects: such as the permanent magnet is easily damaged, the risk of permanent magnet demagnetization increases; the oxidation speed of the insulating enameled wire on the winding is accelerated to make it lose insulation, the viscosity of the lubricating oil is reduced, and the lubrication effect is deteriorated; the parts are deformed due to heat, etc.

[0004] In view of this, the present invention proposes a water-cooled heat dissipation type energy-saving hub motor. Summary of the invention

[0005] The present invention provides a water-cooled heat-dissipating energy-saving hub motor, which solves the problem in the related art that after a long period of use, the heat inside the hub motor cannot be effectively dissipated, which easily causes various adverse effects on the motor.

[0006] The technical solution of the present invention is as follows: A water-cooled heat dissipation type energy-saving hub motor comprises: a main shaft and a motor body sleeved on the outside of the main shaft, the motor body comprises a hub shell, a circulating water channel is spirally opened on the inner side of the hub shell, an insert is fixed at both ends of the hub shell, and the two inserts are connected to the circulating water channel; Both ends of the hub shell are provided with water delivery end covers, the water delivery end covers include a cover plate detachably fixed to the end of the hub shell by bolts, an annular groove is provided on the outer wall of the cover plate, a disc-shaped circulating water cavity is provided inside the cover plate, an injection hole and a socket respectively connected to the head and tail ends of the disc-shaped circulating water cavity are provided inside the cover plate, and the injection hole is connected to the annular groove; The water delivery end cover also includes a hollow swivel fixedly connected to the outer wall of the cover plate, one side of the hollow swivel is rotatably connected to a fixed swivel, the hollow swivel is connected to the fixed swivel, and a fixing hole connected to the inside of the fixed swivel is opened on the outer wall of the fixed swivel; A water pumping mechanism and a water return mechanism are respectively arranged on the main shafts at both sides of the motor body. The cooling water is transported to the inside of the hub shell through the water pumping mechanism, and the water flowing through the inside of the hub shell is discharged through the water return mechanism.

[0007] Preferably, the main shaft comprises a mounting shaft, two ends of the mounting shaft are respectively fixedly connected to a first mounting end and a connecting shaft, and one end of the connecting shaft away from the mounting shaft is fixedly connected to a second mounting end.

[0008] Preferably, the water-drawing mechanism includes a water-drawing hood fixedly sleeved on the outer wall of the connecting shaft, the outer wall of the water-drawing hood is fixedly connected to a water pipe, one end of the water-drawing hood away from the mounting shaft is fixedly connected to the second mounting end, the outer wall of the water-drawing hood is fixedly sleeved with an outer cover, and the water-drawing hood is connected to the inside of the outer cover.

[0009] Preferably, the end of the outer cover away from the water-drawing cover is in an open state, and a wheel disc is rotatably mounted on the end of the outer cover away from the water-drawing cover, an impeller is fixedly connected to the outer wall of the wheel disc, and the impeller and the wheel disc are rotatably mounted on the outer wall of the connecting shaft.

[0010] Preferably, a plurality of connecting rods are fixedly connected to the outer wall of the wheel disc in a circular array, and one end of the connecting rods away from the wheel disc is fixedly connected to the cover plate.

[0011] Preferably, the upper end of the outer cover is fixedly connected to a right-angle water inlet pipe, and the other end of the right-angle water inlet pipe is fixedly connected to the inside of the injection hole.

[0012] Preferably, the water return mechanism comprises a support rod fixedly connected to the outer wall of the mounting shaft, a right-angle water return pipe is fixedly sleeved inside the support rod, and one end of the right-angle water return pipe is fixedly connected to the inside of a fixed swivel close to one side of the water return mechanism.

[0013] Preferably, the two cover plates are rotatably sleeved on the outer wall of the mounting shaft, the motor body further comprises a rotor and a stator arranged on the inner side of the hub shell, and a speed reduction mechanism is arranged on the inner side of the hub shell on one side of the stator.

[0014] Preferably, the reduction mechanism includes a planetary carrier fixedly mounted on the outer periphery of the mounting shaft, and three transmission gears are rotatably connected to the outer wall of the planetary carrier in a circular array. The outer sides of the three transmission gears are commonly meshed and connected with an outer gear ring, and the outer gear ring is mounted on the inner wall of the hub shell.

[0015] Preferably, a sun gear is meshed between the three transmission gears, and the sun gear is connected to the rotor.

[0016] The working principle and beneficial effects of the present invention are: In the present invention, while the wheel hub motor drives the wheel to rotate and walk, the cooling water can be delivered to the fixed rotating ring through the water pumping mechanism. During the rotation of the cover plate on the wheel hub motor, several connecting rods can be driven to rotate, and the wheel disc is driven to rotate through the connecting rod, so that the wheel disc and the impeller can rotate on the outer wall of the connecting shaft. The high-speed rotating impeller can suck the water delivery pipe through the water pumping cover. The water delivery pipe is connected to the external cooling water tank. The cooling water can be delivered to the cavity formed by the outer cover and the wheel disc through the water delivery pipe. The high-speed rotating impeller discharges the cooling water inside the outer cover into the right-angle water inlet pipe, and the water is delivered to the outer shell and the end cover of the wheel hub motor through the right-angle water inlet pipe, so that the wheel hub motor can be water-cooled, and there is no need to equip additional power equipment to pump the circulating water, which saves costs, has a simple overall structure, ingenious design, and has high use value. In the present invention, the water pumping mechanism transports cooling water to the fixed rotating ring, and transports it to the hollow rotating ring through the fixed rotating ring. Then, the cooling water in the hollow rotating ring flows into the annular groove, and is transported to the disc-shaped circulating water cavity through the injection hole. After circulating inside the disc-shaped circulating water cavity, it is transported to the inside of the circulating water channel through the socket and the insert pipe. After the cooling water is circulated inside the circulating water channel, it will be transported to the hollow rotating ring and the fixed rotating ring close to the side of the return water mechanism through another insert pipe, and finally flow into the return water mechanism. The heat-exchanged water is re-sent to the cooling water tank through the return water mechanism, thereby forming a cycle, and the hub motor is continuously cooled by circulating water. The disc-shaped circulating water cavity and the setting in the circulating water channel greatly improve the cooling efficiency of the hub motor, realize the thermal balance and thermal management of the hub motor cavity and the outside world, so as to improve the performance, efficiency and reliability of the motor, solve the problem of motor damage and failure caused by uneven heat dissipation caused by temperature changes, and improve the service life of the hub motor. It has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0018] Figure 1 This is a schematic diagram of the three-dimensional structure of a water-cooled, heat-dissipating, energy-saving hub motor proposed by the present invention; Figure 2 This is a schematic diagram of the internal assembly structure of the motor body proposed by the present invention; Figure 3 This is a schematic diagram of the exploded structure of the motor body proposed by the present invention; Figure 4 This is a schematic diagram of the assembly structure of the hub housing and the water delivery end cover proposed by the present invention; Figure 5 for Figure 4 The enlarged structural diagram at A in the middle; Figure 6 This is a schematic diagram of the cross-sectional structure of the cover plate proposed by the present invention; Figure 7 This is a partial cross-sectional structural schematic diagram of the water delivery end cover proposed by the present invention; Figure 8 for Figure 7 The enlarged structural diagram at B in the middle; Fig. 9 This is a schematic diagram of the assembly structure of the water-drawing cover proposed by the present invention; In the figure: 1. Water-drawing mechanism; 11. Water delivery pipe; 12. Right-angle water inlet pipe; 13. Outer cover; 14. Water-drawing cover; 15. Impeller; 16. Wheel; 17. Connecting rod; 2. Water return mechanism; 21. Right-angle water return pipe; 22. Support rod; 3. Motor body; 31. Hub housing; 32. Circulating water channel; 33. Rotor; 34. Stator; 35. Speed ​​reduction mechanism; 351. External gear ring; 352. Sun gear; 353. Planet carrier; 354. Transmission gear; 36. Intubation; 4. Main shaft; 41. First mounting end; 42. Second mounting end; 43. Connecting shaft; 44. Mounting shaft; 5. Water delivery end cover; 51. Cover plate; 52. Injection hole; 53. Annular groove; 54. Hollow swivel; 55. Fixed swivel; 56. Fixed hole; 57. Disc-shaped circulating water cavity; 58. Socket. DETAILED DESCRIPTION

[0019] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example 1

[0020] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 as well as Figure 6A water-cooled heat dissipation type energy-saving hub motor comprises: a main shaft 4 and a motor body 3 sleeved on the outside of the main shaft 4, the motor body 3 comprises a hub shell 31, a circulating water channel 32 is spirally opened on the inner side of the hub shell 31, and a plug 36 is fixed at both ends of the hub shell 31, and both plugs 36 are connected to the circulating water channel 32. The main shaft 4 comprises a mounting shaft 44, and the two ends of the mounting shaft 44 are respectively fixed with a first mounting end 41 and a connecting shaft 43, and the end of the connecting shaft 43 away from the mounting shaft 44 is fixed with a second mounting end 42. Two cover plates 51 are rotatably sleeved on the outer wall of the mounting shaft 44, the motor body 3 also comprises a rotor 33 and a stator 34 arranged on the inner side of the hub shell 31, and a speed reduction mechanism 35 is arranged on the inner side of the hub shell 31 located on the side of the stator 34. The speed reduction mechanism 35 includes a planet carrier 353 fixedly sleeved on the outer periphery of the mounting shaft 44, and three transmission gears 354 are rotatably connected to the outer wall of the planet carrier 353 in an annular array, and the outer sides of the three transmission gears 354 are commonly meshed and connected with an outer gear ring 351, and the outer gear ring 351 is sleeved on the inner wall of the hub shell 31. A sun gear 352 is commonly meshed between the three transmission gears 354, and the sun gear 352 is connected to the rotor 33.

[0021] Furthermore, water delivery end covers 5 are provided at both ends of the hub shell 31, wherein the water delivery end cover 5 comprises a cover plate 51 detachably fixed to the end of the hub shell 31 by bolts, an annular groove 53 is provided on the outer wall of the cover plate 51, a disc-shaped circulating water cavity 57 is provided inside the cover plate 51, an injection hole 52 and a socket 58 are provided inside the cover plate 51, which are respectively connected to the head and tail ends of the disc-shaped circulating water cavity 57, and the injection hole 52 is connected to the annular groove 53. The water delivery end cover 5 also comprises a hollow swivel 54 fixed to the outer wall of the cover plate 51, a fixed swivel 55 is rotatably connected to one side of the hollow swivel 54, the hollow swivel 54 is connected to the fixed swivel 55, and a fixing hole 56 connected to the inside of the fixed swivel 55 is provided on the outer wall of the fixed swivel 55.

[0022] Furthermore, a water pumping mechanism 1 and a water return mechanism 2 are respectively provided on the main shaft 4 located on both sides of the motor body 3. The cooling water is transported to the inside of the hub shell 31 through the water pumping mechanism 1, and the water flowing through the inside of the hub shell 31 is discharged through the water return mechanism 2.

[0023] In this embodiment, the cooling water is transported to the fixed swivel 55 through the water pumping mechanism 1, and then transported to the hollow swivel 54 through the fixed swivel 55. Then, the cooling water in the hollow swivel 54 flows into the annular groove 53, and is transported to the disc-shaped circulating water chamber 57 through the injection hole 52. After circulating inside the disc-shaped circulating water chamber 57, it is transported to the inside of the circulating water channel 32 through the socket 58 and a plug 36. After the cooling water is circulated inside the circulating water channel 32, it is transported to the hollow swivel 54 and the fixed swivel 55 on the side close to the return mechanism 2 through another plug 36, and finally flows into the return mechanism 2. The water after heat exchange is re-sent to the cooling water tank through the return mechanism 2, thereby forming a cycle. Example 2

[0024] See also Figure 1 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 as well as Fig. 9 A water-cooled, heat-dissipating, energy-saving hub motor includes all the contents of Example 1. Furthermore, the water-drawing mechanism 1 includes a water-drawing cover 14 fixedly sleeved on the outer wall of the connecting shaft 43, the outer wall of the water-drawing cover 14 is fixedly connected with a water pipe 11, one end of the water-drawing cover 14 away from the mounting shaft 44 is fixedly connected to the second mounting end 42, the outer wall of the water-drawing cover 14 is fixedly sleeved with an outer cover 13, and the water-drawing cover 14 is connected to the inside of the outer cover 13.

[0025] Furthermore, the end of the outer cover 13 away from the water-drawing cover 14 is in an open state, and a wheel disc 16 is rotatably sleeved on the end of the outer cover 13 away from the water-drawing cover 14, and an impeller 15 is fixedly connected to the outer wall of the wheel disc 16, and both the impeller 15 and the wheel disc 16 are rotatably sleeved on the outer wall of the connecting shaft 43. A plurality of connecting rods 17 are fixedly connected to the outer wall of the wheel disc 16 in an annular array, and the ends of the connecting rods 17 away from the wheel disc 16 are fixedly connected to the cover plate 51. A right-angle water inlet pipe 12 is fixedly connected to the upper end of the outer cover 13, and the other end of the right-angle water inlet pipe 12 is fixedly connected to the inside of the injection hole 52.

[0026] Furthermore, the water return mechanism 2 includes a support rod 22 fixedly connected to the outer wall of the mounting shaft 44 , a right-angle water return pipe 21 is fixedly sleeved inside the support rod 22 , and one end of the right-angle water return pipe 21 is fixedly connected to the inside of a fixed swivel 55 close to one side of the water return mechanism 2 .

[0027] In this embodiment, a water tank filled with cooling water is pre-installed on the frame, and one end of the water supply pipe 11 and the right-angle return pipe 21 are connected to the cooling water tank, and the hub motor is installed in the wheel hub to drive the wheel to rotate by converting electrical energy into mechanical energy. During this process, the hub shell 31 drives the cover plates 51 at both ends thereof to rotate on the outer wall of the mounting shaft 44. During the rotation of the cover plate 51, the hollow swivel 54 can be driven to rotate. At this time, one of the fixed swivels 55 is fixedly connected to the outer cover 13 through the right-angle water inlet pipe 12, and the other fixed swivel 55 is fixedly connected to the mounting shaft 44 through the right-angle return pipe 21 and the support rod 22. This makes it possible to drive the hollow swivel 54 to rotate on one side of the fixed swivel 55 when the cover plate 51 rotates.

[0028] During the rotation of the cover plate 51, several connecting rods 17 can be driven to rotate, and the connecting rods 17 can drive the wheel disc 16 to rotate, wherein the wheel disc 16, the impeller 15, the outer cover 13, the water suction cover 14 and the right-angle water inlet pipe 12 together form a small water pump. When the wheel disc 16 and the impeller 15 rotate on the outer wall of the connecting shaft 43, the high-speed rotating impeller 15 can suck the water delivery pipe 11 through the water suction cover 14. The water delivery pipe 11 is connected to the external cooling water tank, and the cooling water is delivered to the cavity formed by the outer cover 13 and the wheel disc 16 through the water delivery pipe 11. The high-speed rotating impeller 15 discharges the cooling water inside the outer cover 13. The cooling water flows out to the right-angle water inlet pipe 12, is transported to the fixed swivel 55 through the right-angle water inlet pipe 12, and is transported to the hollow swivel 54 through the fixed swivel 55. Then, the cooling water in the hollow swivel 54 flows into the annular groove 53, and is transported to the disc-shaped circulating water cavity 57 through the injection hole 52. After circulating inside the disc-shaped circulating water cavity 57, it is transported to the inside of the circulating water channel 32 through the socket 58 and a plug 36. After the cooling water is circulated inside the circulating water channel 32, it is transported to the hollow swivel 54 and the fixed swivel 55 near the side of the return mechanism 2 through another plug 36, and finally flows into the right-angle return water pipe 21.

[0029] Working principle and usage process: When working, a water tank filled with cooling water is pre-installed on the frame, and one end of the water supply pipe 11 and the right-angle return pipe 21 are connected to the cooling water tank, and the hub motor is installed in the wheel hub to drive the wheel to rotate by converting electrical energy into mechanical energy. During this process, the hub shell 31 drives the cover plates 51 at both ends thereof to rotate on the outer wall of the mounting shaft 44. During the rotation of the cover plate 51, the hollow swivel 54 can be driven to rotate. At this time, one of the fixed swivels 55 is fixedly connected to the outer cover 13 through the right-angle water inlet pipe 12, and the other fixed swivel 55 is fixedly connected to the mounting shaft 44 through the right-angle return pipe 21 and the support rod 22. This makes it possible to drive the hollow swivel 54 to rotate on one side of the fixed swivel 55 when the cover plate 51 rotates.

[0030] During the rotation of the cover plate 51, several connecting rods 17 can be driven to rotate, and the connecting rods 17 can drive the wheel disc 16 to rotate, so that the wheel disc 16 and the impeller 15 can rotate on the outer wall of the connecting shaft 43. The high-speed rotating impeller 15 can suck the water pipe 11 through the water suction cover 14. The water pipe 11 is connected to the external cooling water tank, and the cooling water is transported to the cavity formed by the outer cover 13 and the wheel disc 16 through the water pipe 11. The high-speed rotating impeller 15 discharges the cooling water on the inner side of the outer cover 13 into the right-angle water inlet pipe 12, and is transported to the fixed swivel 55 through the right-angle water inlet pipe 12, and is transported to the hollow swivel 54 through the fixed swivel 55. Then, the cooling water in the hollow swivel 54 flows into the annular groove 53, and is transported to the disc-shaped circulating water cavity 57 through the injection hole 52, and is transported to the disc-shaped circulating water cavity 57 through the disc-shaped After circulating inside the circulating water chamber 57, the cooling water is transported to the inside of the circulating water channel 32 through the socket 58 and a plug 36. After circulating inside the circulating water channel 32, the cooling water is transported to the hollow swivel 54 and the fixed swivel 55 near the side of the return mechanism 2 through another plug 36, and finally flows into the right-angle return pipe 21. The water that has exchanged heat with the hub shell 31 and the cover plate 51 is re-sent to the cooling water tank through the right-angle return pipe 21, thereby forming a cycle, so that the hub motor can continuously cool the hub motor through the circulating water while driving the wheel to rotate and move, thereby achieving thermal balance and thermal management between the hub motor cavity and the outside world, so as to improve the performance, efficiency and reliability of the motor, solve the problem of motor damage and failure caused by uneven heat dissipation caused by temperature changes, and increase the service life of the hub motor.

[0031] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A water-cooled heat dissipation type energy-saving hub motor, characterized in that: include: A main shaft (4) and a motor body (3) sleeved on the outside of the main shaft (4), the motor body (3) comprising a hub shell (31), a circulating water channel (32) spirally opened on the inside of the hub shell (31), a plug (36) fixed at each end of the hub shell (31), and the two plugs (36) are both connected to the circulating water channel (32); Both ends of the hub shell (31) are provided with water delivery end covers (5), the water delivery end covers (5) comprising a cover plate (51) detachably fixed to the end of the hub shell (31) by bolts, an annular groove (53) is provided on the outer wall of the cover plate (51), a disc-shaped circulating water cavity (57) is provided inside the cover plate (51), an injection hole (52) and a socket (58) are provided inside the cover plate (51) and are respectively connected to the front and rear ends of the disc-shaped circulating water cavity (57), and the injection hole (52) is connected to the annular groove (53); The water delivery end cover (5) further comprises a hollow rotating ring (54) fixedly connected to the outer wall of the cover plate (51); one side of the hollow rotating ring (54) is rotatably connected to a fixed rotating ring (55); the hollow rotating ring (54) is connected to the fixed rotating ring (55); and a fixing hole (56) connected to the interior of the fixed rotating ring (55) is formed on the outer wall of the fixed rotating ring (55); A water pumping mechanism (1) and a water return mechanism (2) are respectively provided on the main shaft (4) located on both sides of the motor body (3); cooling water is transported to the interior of the hub shell (31) through the water pumping mechanism (1); and water flowing through the interior of the hub shell (31) is discharged through the water return mechanism (2).

2. A water-cooled heat dissipation energy-saving hub motor according to claim 1, characterized in that: The main shaft (4) comprises a mounting shaft (44), two ends of the mounting shaft (44) are respectively fixedly connected to a first mounting end (41) and a connecting shaft (43), and one end of the connecting shaft (43) away from the mounting shaft (44) is fixedly connected to a second mounting end (42).

3. A water-cooled heat dissipation energy-saving hub motor according to claim 2, characterized in that: The water-drawing mechanism (1) comprises a water-drawing cover (14) fixedly sleeved on the outer wall of the connecting shaft (43); the outer wall of the water-drawing cover (14) is fixedly connected to a water pipe (11); one end of the water-drawing cover (14) away from the mounting shaft (44) is fixedly connected to the second mounting end (42); the outer wall of the water-drawing cover (14) is fixedly sleeved with an outer cover (13); the water-drawing cover (14) is connected to the inside of the outer cover (13).

4. A water-cooled heat dissipation energy-saving hub motor according to claim 3, characterized in that: One end of the outer cover (13) away from the water-drawing cover (14) is in an open state, and a wheel disc (16) is rotatably sleeved on the end of the outer cover (13) away from the water-drawing cover (14), an impeller (15) is fixedly connected to the outer wall of the wheel disc (16), and both the impeller (15) and the wheel disc (16) are rotatably sleeved on the outer wall of the connecting shaft (43).

5. A water-cooled heat dissipation energy-saving hub motor according to claim 4, characterized in that: A plurality of connecting rods (17) are fixedly connected in an annular array to the outer wall of the wheel disc (16), and one end of the connecting rods (17) away from the wheel disc (16) is fixedly connected to the cover plate (51).

6. A water-cooled heat dissipation energy-saving hub motor according to claim 4, characterized in that: The upper end of the outer cover (13) is fixedly connected to a right-angle water inlet pipe (12), and the other end of the right-angle water inlet pipe (12) is fixedly connected to the inside of the injection hole (52).

7. The water-cooled heat dissipation energy-saving hub motor according to claim 5, characterized in that: The water return mechanism (2) comprises a support rod (22) fixedly connected to the outer wall of the mounting shaft (44), a right-angle water return pipe (21) being fixedly sleeved inside the support rod (22), and one end of the right-angle water return pipe (21) being fixedly connected to the inside of a fixed swivel (55) close to one side of the water return mechanism (2).

8. The water-cooled heat dissipation energy-saving hub motor according to claim 6, characterized in that: The two cover plates (51) are both rotatably sleeved on the outer wall of the mounting shaft (44); the motor body (3) further comprises a rotor (33) and a stator (34) arranged on the inner side of the hub shell (31); a speed reduction mechanism (35) is arranged on the inner side of the hub shell (31) located on one side of the stator (34).

9. The water-cooled heat dissipation energy-saving hub motor according to claim 8, characterized in that: The speed reduction mechanism (35) comprises a planet carrier (353) fixedly sleeved on the outer periphery of the mounting shaft (44); three transmission gears (354) are rotatably connected in an annular array on the outer wall of the planet carrier (353); the outer sides of the three transmission gears (354) are meshingly connected with an outer gear ring (351); and the outer gear ring (351) is sleeved on the inner wall of the hub shell (31).

10. A water-cooled heat dissipation energy-saving hub motor according to claim 9, characterized in that: A sun gear (352) is meshed between the three transmission gears (354), and the sun gear (352) is connected to the rotor (33).

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