Water-cooled heat dissipation type energy-saving wheel hub motor

Abstract

The application relates to the technical field of wheel hub motors, and discloses a water-cooled heat dissipation type energy-saving wheel hub motor which comprises a water pumping mechanism and a motor main body, and can deliver cooling water into a fixed rotating ring through the water pumping mechanism while the wheel hub motor drives a wheel to rotate and walk. In the process of rotating the cover plate on the wheel hub motor, the connecting rod can drive the wheel disc to rotate, 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 cooling water can be delivered into the cavity formed by the outer cover and the wheel disc through the water delivery pipe, the cooling water on the inner side of the outer cover is discharged into the right-angle water inlet pipe, and then is delivered into the shell and the end cover of the wheel hub motor through the right-angle water inlet pipe, so that the wheel hub motor is water-cooled, the circulating water does not need to be pumped by additionally arranging a power device, the overall structure is simple, the design is ingenious, and the wheel hub motor has high use value.

Description

Technical Field

[0001] This invention relates to the field of hub motor technology, specifically to a water-cooled, heat-dissipating, energy-saving hub motor. Background Technology

[0002] In recent years, two-wheeled electric vehicles have experienced rapid development in China, especially in smaller third- and fourth-tier cities and vast rural areas, where they have become an important means of road transportation. Electric vehicles are favored by consumers for their affordability, convenience, environmental friendliness, and ease of operation. As a key component in the industry chain, the electric bicycle hub motor is showing a positive trend in both its current status and development. In the future, with continuous technological advancements and market expansion, the electric bicycle hub motor industry will usher in even broader development prospects.

[0003] For hub motors, after prolonged use, the temperature of the main heat-generating areas, such as the windings, stator, and rotor, rises sharply, increasing heat generation and thus deteriorating the internal working conditions of the motor. When the heat inside the motor cannot be effectively dissipated, many adverse effects occur: such as damage to permanent magnets and an increased risk of demagnetization; accelerated oxidation of the insulating enameled wire on the windings, causing it to lose its insulation properties; reduced lubricating oil viscosity, worsening lubrication; and thermal deformation of machine parts.

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

[0005] This invention proposes a water-cooled, heat-dissipating, energy-saving hub motor, which solves the problem in related technologies where the heat inside the hub motor cannot be effectively dissipated after long-term use, easily causing 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 includes: a main shaft and a motor body sleeved on the outside of the main shaft. The motor body includes a hub shell. A circulating water channel is spirally opened on the inner side of the hub shell. A tube is fixed at both ends of the hub shell. Both tubes are connected to the circulating water channel.

[0007] Both ends of the hub shell are provided with water supply end caps. The water supply end caps include a cover plate that is detachably fixed to the end of the hub shell by bolts. The outer wall of the cover plate is provided with an annular groove. The inside of the cover plate is provided with a disc-shaped circulating water cavity. The inside of the cover plate is provided with an injection hole and an inlet that are respectively connected to the first and last ends of the disc-shaped circulating water cavity. The injection hole is connected to the annular groove.

[0008] The water supply end cap also includes a hollow rotating ring fixed to the outer wall of the cover plate. A fixed rotating ring is rotatably connected to one side of the hollow rotating ring. The hollow rotating ring is connected to the fixed rotating ring. A fixing hole communicating with the inside of the fixed rotating ring is opened on the outer wall of the fixed rotating ring.

[0009] A water intake mechanism and a water return mechanism are respectively installed on the main shafts located on both sides of the motor body. The water intake mechanism delivers cooling water to the inside of the hub housing, and the water return mechanism discharges the water that has flowed through the inside of the hub housing.

[0010] Preferably, the spindle includes a mounting shaft, with a first mounting end and a connecting shaft fixedly connected to both ends of the mounting shaft, and a second mounting end fixedly connected to the end of the connecting shaft away from the mounting shaft.

[0011] Preferably, the water-drawing mechanism includes a water-drawing cover fixedly sleeved on the outer wall of the connecting shaft, a water supply pipe fixedly connected to the outer wall of the water-drawing cover, one end of the water-drawing cover away from the mounting shaft being fixedly connected to the second mounting end, an outer cover being fixedly sleeved on the outer wall of the water-drawing cover, and the water-drawing cover being connected to the interior of the outer cover.

[0012] Preferably, the end of the outer cover away from the water-drawing cover is open, and a wheel 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, and both the impeller and the wheel are rotatably mounted on the outer wall of the connecting shaft.

[0013] Preferably, a plurality of connecting rods are fixedly connected in a ring array on the outer wall of the wheel, and the ends of the connecting rods away from the wheel are all fixedly connected to the cover plate.

[0014] Preferably, a right-angle water inlet pipe is fixedly connected to the upper end of the outer cover, and the other end of the right-angle water inlet pipe is fixedly connected to the inside of the injection hole.

[0015] Preferably, the water return mechanism includes a support rod fixed to the outer wall of the mounting shaft, and a right-angle water return pipe is fixedly sleeved inside the support rod. One end of the right-angle water return pipe is fixedly connected to the inside of a fixed rotating ring near the side of the water return mechanism.

[0016] Preferably, both cover plates are rotatably sleeved on the outer wall of the mounting shaft, and the motor body also includes a rotor and a stator disposed inside the hub housing, and a reduction mechanism is disposed inside the hub housing on one side of the stator.

[0017] Preferably, the deceleration mechanism includes a planetary carrier fixedly sleeved on the outer periphery of the mounting shaft, and three transmission gears are rotatably connected in a ring array on the outer wall of the planetary carrier. The outer sides of the three transmission gears are meshed with an external gear ring, which is sleeved on the inner wall of the hub housing.

[0018] Preferably, the three transmission gears are meshed together by a sun gear, which is connected to the rotor.

[0019] The working principle and beneficial effects of this invention are as follows:

[0020] In this invention, while the hub motor drives the wheel to rotate and move, cooling water can be transported to the fixed rotating ring through the water suction mechanism. During the rotation of the cover plate on the hub motor, several connecting rods can be driven to rotate, which in turn drives the wheel disc to rotate. This allows the wheel disc and impeller to rotate on the outer wall of the connecting shaft. The high-speed rotating impeller can draw water through the water suction cover into the water supply pipe. The water supply pipe is connected to an external cooling water tank, and cooling water can be transported to the cavity formed by the outer cover and the wheel disc through the water supply pipe. The high-speed rotating impeller discharges the cooling water inside the outer cover into the right-angle water inlet pipe, and then transports it to the outer shell and end cover of the hub motor through the right-angle water inlet pipe. This enables water cooling treatment of the hub motor without the need for additional power equipment to pump circulating water, saving costs. The overall structure is simple, the design is ingenious, and it has high practical value.

[0021] In this invention, the water-drawing mechanism delivers cooling water to a fixed rotating ring, which then delivers it to a hollow rotating ring. The cooling water in the hollow rotating ring flows into an annular groove and is then delivered through an injection hole to a disc-shaped circulating water chamber. After circulating within the disc-shaped circulating water chamber, the water is then delivered through an inlet and a pipe to the circulating water channel. After circulating within the circulating water channel, the cooling water is delivered through another pipe to the hollow rotating ring and fixed rotating ring near the return water mechanism, and finally flows into the return water mechanism. The return water mechanism then returns the heat-exchanged water to the cooling water tank, thus forming a cycle that continuously cools the hub motor. The disc-shaped circulating water chamber and the circulating water channel significantly improve the cooling efficiency of the hub motor, achieving thermal balance and thermal management between the hub motor cavity and the external environment. This improves the motor's performance, efficiency, and reliability, solves the problem of motor damage and failure caused by uneven heat dissipation due to temperature changes, and extends the service life of the hub motor, demonstrating broad application prospects. Attached Figure Description

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0023] Figure 1 This is a three-dimensional structural diagram of a water-cooled heat dissipation type energy-saving hub motor proposed in this invention;

[0024] Figure 2 This is a schematic diagram of the internal assembly structure of the motor body proposed in this invention;

[0025] Figure 3This is a schematic diagram of the exploded structure of the motor body proposed in this invention;

[0026] Figure 4 This is a schematic diagram of the assembly structure of the hub shell and the water supply end cap proposed in this invention;

[0027] Figure 5 for Figure 4 Enlarged structural diagram at point A in the middle;

[0028] Figure 6 This is a schematic cross-sectional view of the cover plate structure proposed in this invention;

[0029] Figure 7 This is a partial cross-sectional view of the water conveyance end cap proposed in this invention;

[0030] Figure 8 for Figure 7 Enlarged structural diagram at point B;

[0031] Figure 9 This is a schematic diagram of the water-drawing cover assembly structure proposed in this invention;

[0032] In the picture:

[0033] 1. Water intake mechanism; 11. Water supply pipe; 12. Right-angle water inlet pipe; 13. Outer cover; 14. Water intake cover; 15. Impeller; 16. Wheel; 17. Connecting rod;

[0034] 2. Water return mechanism; 21. Right-angle water return pipe; 22. Support rod;

[0035] 3. Motor body; 31. Hub housing; 32. Circulating water channel; 33. Rotor; 34. Stator; 35. Reduction mechanism; 351. External gear ring; 352. Sun gear; 353. Planetary carrier; 354. Transmission gear; 36. Insert tube;

[0036] 4. Spindle; 41. First mounting end; 42. Second mounting end; 43. Connecting shaft; 44. Mounting shaft;

[0037] 5. Water supply end cap; 51. Cover plate; 52. Injection hole; 53. Annular groove; 54. Hollow rotating ring; 55. Fixed rotating ring; 56. Fixed hole; 57. Disc-shaped circulating water chamber; 58. Inlet. Detailed Implementation

[0038] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention. Example 1

[0039] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 as well as Figure 6 A water-cooled, energy-saving hub motor includes a main shaft 4 and a motor body 3 sleeved on the outside of the main shaft 4. The motor body 3 includes a hub shell 31, with a circulating water channel 32 spirally formed inside the hub shell 31. A tube 36 is fixed to both ends of the hub shell 31, and both tubes 36 are connected to the circulating water channel 32. The main shaft 4 includes a mounting shaft 44, with a first mounting end 41 and a connecting shaft 43 fixed to its two ends respectively. A second mounting end 42 is fixed to the end of the connecting shaft 43 away from the mounting shaft 44. Two cover plates 51 are rotatably sleeved on the outer wall of the mounting shaft 44. The motor body 3 also includes a rotor 33 and a stator 34 disposed inside the hub shell 31. A reduction mechanism 35 is disposed inside the hub shell 31 on one side of the stator 34. The reduction mechanism 35 includes a planetary carrier 353 fixedly sleeved on the outer periphery of the mounting shaft 44. Three transmission gears 354 are rotatably connected in a ring array on the outer wall of the planetary carrier 353. An external gear ring 351 is meshed with the outer sides of the three transmission gears 354 and is sleeved on the inner wall of the hub housing 31. A sun gear 352 meshes with the three transmission gears 354 and is connected to the rotor 33.

[0040] Furthermore, water inlet caps 5 are provided at both ends of the hub housing 31. Each water inlet cap 5 includes a cover plate 51 that is detachably fixed to the end of the hub housing 31 by bolts. The outer wall of the cover plate 51 has an annular groove 53, and the inside of the cover plate 51 has a disc-shaped circulating water cavity 57. The inside of the cover plate 51 has an injection hole 52 and an inlet 58 that are respectively connected to the first and last ends of the disc-shaped circulating water cavity 57, and the injection hole 52 is connected to the annular groove 53. The water inlet cap 5 also includes a hollow rotating ring 54 fixed to the outer wall of the cover plate 51. A fixed rotating ring 55 is rotatably connected to one side of the hollow rotating ring 54. The hollow rotating ring 54 and the fixed rotating ring 55 are connected. The outer wall of the fixed rotating ring 55 has a fixing hole 56 that is connected to the inside of the fixed rotating ring 55.

[0041] Furthermore, a water intake mechanism 1 and a water return mechanism 2 are respectively installed on the main shafts 4 on both sides of the motor body 3. The water intake mechanism 1 delivers cooling water to the inside of the hub housing 31, and the water return mechanism 2 discharges the water flowing through the inside of the hub housing 31.

[0042] In this embodiment, cooling water is transported to the fixed rotating ring 55 through the water intake mechanism 1, and then to the hollow rotating ring 54 through the fixed rotating ring 55. Next, the cooling water in the hollow rotating ring 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 circulating water channel 32 through the inlet 58 and an insert 36. After circulating inside the circulating water channel 32, the cooling water is transported to the hollow rotating ring 54 and the fixed rotating ring 55 near the side of the return water mechanism 2 through another insert 36, and finally flows into the return water mechanism 2. The return water mechanism 2 sends the heat-exchanged water back into the cooling water tank, thus forming a cycle. Example 2

[0043] Please see Figure 1 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 as well as Figure 9 A water-cooled heat dissipation type energy-saving hub motor includes all the contents of Embodiment 1. Further, the water-drawing mechanism 1 includes a water-drawing cover 14 fixedly sleeved on the outer wall of the connecting shaft 43. A water supply pipe 11 is fixedly connected to the outer wall of the water-drawing cover 14. One end of the water-drawing cover 14 away from the mounting shaft 44 is fixedly connected to the second mounting end 42. An outer cover 13 is fixedly sleeved on the outer wall of the water-drawing cover 14. The water-drawing cover 14 and the outer cover 13 are internally connected.

[0044] Furthermore, the end of the outer cover 13 away from the water intake cover 14 is open, and a wheel 16 is rotatably mounted on the end of the outer cover 13 away from the water intake cover 14. An impeller 15 is fixedly connected to the outer wall of the wheel 16, and both the impeller 15 and the wheel 16 are rotatably mounted on the outer wall of the connecting shaft 43. Multiple connecting rods 17 are fixedly connected in a ring array on the outer wall of the wheel 16, and the ends of the connecting rods 17 away from the wheel 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.

[0045] Furthermore, the water return mechanism 2 includes a support rod 22 fixed to the outer wall of the mounting shaft 44, and a right-angle water return pipe 21 is fixedly sleeved inside the support rod 22. One end of the right-angle water return pipe 21 is fixedly connected to the inside of the fixed rotating ring 55 near the side of the water return mechanism 2.

[0046] In this embodiment, a water tank containing cooling water is pre-installed on the vehicle frame, and one end of the water supply pipe 11 and the right-angle return water pipe 21 are connected to the cooling water tank. The hub motor is installed inside the wheel hub, and the wheel is driven to rotate by converting electrical energy into mechanical energy. During this process, the wheel hub shell 31 drives the cover plates 51 at both ends to rotate on the outer wall of the mounting shaft 44. During the rotation of the cover plates 51, the hollow rotating ring 54 can be driven to rotate. At this time, one of the fixed rotating rings 55 is fixedly connected to the outer cover 13 through the right-angle water inlet pipe 12, and the other fixed rotating ring 55 is fixedly connected to the mounting shaft 44 through the right-angle return water pipe 21 and the support rod 22. This allows the hollow rotating ring 54 to rotate on one side of the fixed rotating ring 55 when the cover plate 51 rotates.

[0047] During the rotation of the cover plate 51, several connecting rods 17 are driven to rotate, which in turn drive the wheel 16 to rotate. The wheel 16, impeller 15, outer cover 13, water suction cover 14, and right-angle water inlet pipe 12 together form a small water pump. When the wheel 16 and impeller 15 rotate on the outer wall of the connecting shaft 43, the high-speed rotating impeller 15 can draw water from the water supply pipe 11 through the water suction cover 14. The water supply pipe 11 is connected to an external cooling water tank, and cooling water is delivered to the cavity formed by the outer cover 13 and the wheel 16 through the water supply pipe 11. The high-speed rotating impeller 15 discharges the cooling water inside the outer cover 13. The water flows out into the right-angle inlet pipe 12, and is then transported to the fixed rotating ring 55. From there, it is transported to the hollow rotating ring 54. The cooling water in the hollow rotating ring 54 flows into the annular groove 53 and is then transported to the disc-shaped circulating water chamber 57 through the injection hole 52. After circulating inside the disc-shaped circulating water chamber 57, the cooling water is then transported to the circulating water channel 32 through the inlet 58 and an insert pipe 36. After circulating inside the circulating water channel 32, the cooling water is transported to the hollow rotating ring 54 and the fixed rotating ring 55 near the return water mechanism 2 through another insert pipe 36, and finally flows into the right-angle return water pipe 21.

[0048] Working principle and usage process: During operation, a water tank containing cooling water is pre-installed on the frame, and one end of the water supply pipe 11 and the right-angle return water pipe 21 are connected to the cooling water tank. The hub motor is installed inside the wheel hub, and the wheel is driven to rotate by converting electrical energy into mechanical energy. During this process, the wheel hub shell 31 drives the cover plates 51 at both ends to rotate on the outer wall of the mounting shaft 44. During the rotation of the cover plates 51, the hollow rotating ring 54 can be driven to rotate. At this time, one of the fixed rotating rings 55 is fixedly connected to the outer cover 13 through the right-angle water inlet pipe 12, and the other fixed rotating ring 55 is fixedly connected to the mounting shaft 44 through the right-angle return water pipe 21 and the support rod 22. This allows the hollow rotating ring 54 to rotate on one side of the fixed rotating ring 55 when the cover plate 51 rotates.

[0049] During the rotation of the cover plate 51, several connecting rods 17 are driven to rotate, which in turn drive the wheel 16 to rotate. This allows the wheel 16 and impeller 15 to rotate on the outer wall of the connecting shaft 43. The high-speed rotating impeller 15 can draw water from the water supply pipe 11 through the water suction cover 14. The water supply pipe 11 is connected to an external cooling water tank, and cooling water is delivered to the cavity formed by the outer cover 13 and the wheel 16 through the water supply pipe 11. The high-speed rotating impeller 15 discharges the cooling water inside the outer cover 13 into the right-angle water inlet pipe 12, which then delivers it to the fixed rotating ring 55. The fixed rotating ring 55 then delivers it to the hollow rotating ring 54. Next, the cooling water in the hollow rotating ring 54 flows into the annular groove 53 and is delivered to the disc-shaped circulating water chamber 57 through the injection hole 52. After circulating inside the circulating water chamber 57, the water is then transported to the circulating water channel 32 through the inlet 58 and an insert pipe 36. After circulating inside the circulating water channel 32, the cooling water is transported through another insert pipe 36 to the hollow rotating ring 54 and the fixed rotating ring 55 near the return water mechanism 2, and finally flows into the right-angle return water pipe 21. The water that has exchanged heat with the hub housing 31 and the cover plate 51 is sent back to the cooling water tank through the right-angle return water pipe 21, thus forming a circulation. This allows the hub motor to continuously cool the hub motor while driving the wheel to rotate and move, achieving thermal balance and thermal management between the hub motor cavity and the outside world. This improves the performance, efficiency and reliability of the motor, solves the problem of motor damage and failure caused by uneven heat dissipation due to temperature changes, and extends the service life of the hub motor.

[0050] The above are merely 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 within the protection scope of the present invention.

Claims

1. A water-cooled, energy-saving hub motor, characterized in that, include: The main shaft (4) and the motor body (3) sleeved on the outside of the main shaft (4) include a hub shell (31), and a circulating water channel (32) is spirally opened on the inner side of the hub shell (31). A tube (36) is fixed at both ends of the hub shell (31), and both tubes (36) are connected to the circulating water channel (32). Both ends of the hub shell (31) are provided with water supply end caps (5). The water supply end caps (5) include a cover plate (51) that is detachably fixed to the end of the hub shell (31) by bolts. The outer wall of the cover plate (51) is provided with an annular groove (53). The inside of the cover plate (51) is provided with a disc-shaped circulating water cavity (57). The inside of the cover plate (51) is provided with an injection hole (52) and an inlet (58) that are respectively connected to the first and last ends of the disc-shaped circulating water cavity (57). The injection hole (52) is connected to the annular groove (53). The water supply end cap (5) also includes a hollow rotating ring (54) fixed to the outer wall of the cover plate (51). A fixed rotating ring (55) is rotatably connected to one side of the hollow rotating ring (54). The hollow rotating ring (54) is connected to the fixed rotating ring (55). A fixing hole (56) communicating with the inside of the fixed rotating ring (55) is provided on the outer wall of the fixed rotating ring (55). A water-drawing mechanism (1) and a water-returning mechanism (2) are respectively provided on the main shaft (4) on both sides of the motor body (3). The water-drawing mechanism (1) delivers cooling water to the inside of the hub housing (31), and the water flowing through the hub housing (31) is discharged through the water-returning mechanism (2).

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

3. The water-cooled heat dissipation type energy-saving hub motor according to claim 2, characterized in that, The water-drawing mechanism (1) includes a water-drawing cover (14) fixedly sleeved on the outer wall of the connecting shaft (43). A water supply pipe (11) is fixedly connected to the outer wall of the water-drawing cover (14). One end of the water-drawing cover (14) away from the mounting shaft (44) is fixedly connected to the second mounting end (42). An outer cover (13) is fixedly sleeved on the outer wall of the water-drawing cover (14). The water-drawing cover (14) and the inner part of the outer cover (13) are connected.

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

5. A water-cooled, heat-dissipating, energy-saving hub motor according to claim 4, characterized in that, Multiple connecting rods (17) are fixedly connected in a ring array on the outer wall of the wheel (16), and the ends of the connecting rods (17) away from the wheel (16) are fixedly connected to the cover plate (51).

6. The water-cooled heat dissipation type 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. A water-cooled, heat-dissipating, energy-saving hub motor according to claim 5, characterized in that, The water return mechanism (2) includes a support rod (22) fixed to the outer wall of the mounting shaft (44). A right-angle water return pipe (21) is fixedly sleeved inside the support rod (22). One end of the right-angle water return pipe (21) is fixedly connected to the inside of a fixed rotating ring (55) near the side of the water return mechanism (2).

8. A water-cooled, heat-dissipating, energy-saving hub motor according to claim 6, characterized in that, Both of the cover plates (51) are rotatably sleeved on the outer wall of the mounting shaft (44). The motor body (3) also includes a rotor (33) and a stator (34) disposed inside the hub housing (31). A speed reduction mechanism (35) is disposed inside the hub housing (31) on one side of the stator (34).

9. A water-cooled, heat-dissipating, energy-saving hub motor according to claim 8, characterized in that, The deceleration mechanism (35) includes a planetary carrier (353) fixedly sleeved on the outer periphery of the mounting shaft (44). Three transmission gears (354) are rotatably connected in a ring array on the outer wall of the planetary carrier (353). An external gear ring (351) is meshed with the outer side of the three transmission gears (354). The external gear ring (351) is sleeved on the inner wall of the hub housing (31).

10. A water-cooled, heat-dissipating, energy-saving hub motor according to claim 9, characterized in that, The three transmission gears (354) are meshed together with a sun gear (352), which is connected to the rotor (33).

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