Energy-saving external rotor motor structure

Abstract

An energy-saving outer rotor motor structure disclosed by the present invention comprises a main shaft, an end cover sleeving the main shaft, and a driving wheel fixedly connected with the end cover through a screw, the outer end of the main shaft is sequentially sleeved with a stator coil, a rotor and a support, a third bearing is arranged between the support and the driving wheel, and the rotor is rotatably connected with the main shaft through a second bearing. A magnet ring is connected to the side, close to a stator coil, of the rotor, a center wheel is fixedly connected to the rotor, a duplex planet wheel is connected to the support through a supporting column, a gear ring is clamped in the driving wheel, a first bearing and a first sealing ring are arranged between the rotor and the driving wheel, and a liquid injection hole is formed in the end cover. The first cavity on the left side of the rotor is filled with cooling liquid, the driving wheel is provided with an oil supplementing hole, and the second cavity on the right side of the rotor is filled with lubricating oil. The hub motor solves the problems that an existing hub motor is weak in heat dissipation capability, and cannot be cooled in time during working, so that the loss of a hub is accelerated.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and particularly to an energy-saving outer rotor motor structure. Background Art

[0002] Good heat dissipation of a wheel motor is a basic requirement. The existing wheel motors have weak heat dissipation ability and will heat up after long-term use. If the internal transmission components of the wheel motor continue to be in a high-temperature state and are not cooled in time, the motor body will be damaged, thereby reducing the service life and safety of the motor and increasing the use cost. Summary of the Invention

[0003] The main technical problem to be solved by the present invention is to provide an energy-saving outer rotor motor structure, which solves the problem that the existing wheel motors have weak heat dissipation ability and cannot be cooled in time during operation, thus accelerating the loss of the wheel motors.

[0004] To solve the above technical problem, a technical solution adopted by the present invention is: to provide an energy-saving outer rotor motor structure, including: a main shaft, an end cover sleeved on the main shaft, and a driving wheel fixedly connected to the end cover by screws. A stator coil, a rotor, and a bracket are sequentially sleeved on the outer end of the main shaft. A third bearing is provided between the bracket and the driving wheel. The rotor is rotatably connected to the main shaft through a second bearing. A magnetic ring is connected to one side of the rotor close to the stator coil. A central wheel is fixedly connected to the rotor. A double planetary gear is connected to the bracket through a support column. A gear ring is clamped inside the driving wheel. The central wheel meshes with the double planetary gear, and the double planetary gear meshes with the gear ring. A first bearing and a first sealing ring are provided between the rotor and the driving wheel. A liquid injection hole is opened on the end cover, and a coolant is poured into the first cavity on the left side of the rotor. An oil replenishing hole is opened on the driving wheel, and a lubricating oil is poured into the second cavity on the right side of the rotor.

[0005] In a preferred embodiment of the present invention, a plug screw is installed on the liquid injection hole, and an oil plug screw is installed on the oil replenishing hole.

[0006] In a preferred embodiment of the present invention, one end of the main shaft extending into the second cavity is a hollow structure, and an oil inlet hole is provided on one end of the main shaft, and the oil inlet hole is communicated with the hollow structure.

[0007] In a preferred embodiment of the present invention, the driving wheel is provided with a plurality of heat dissipation holes along the circumferential direction.

[0008] In a preferred embodiment of the present invention, a plain bearing is provided between the central wheel and the bracket.

[0009] In a preferred embodiment of the present invention, both sides of the bracket are connected to the main shaft through a snap spring and a snap ring, and a rubber pad is provided between the snap ring and the plain bearing.

[0010] In a preferred embodiment of the present invention, a fourth sealing ring is provided on the side of the rotor away from the first cavity.

[0011] In a preferred embodiment of the present invention, the double planetary gear is rotatably connected to the support column through a fourth bearing.

[0012] In a preferred embodiment of the present invention, a second sealing ring is provided between the end cover and the driving wheel, and a third sealing ring is provided between the end cover and the main shaft.

[0013] In a preferred embodiment of the present invention, a Hall plate is provided on the stator coil.

[0014] The beneficial effects of the present invention are as follows: 1. By filling the coolant in the first cavity of the motor and filling the lubricating oil in the second cavity, the heat generated by the electronic coil can be cooled down rapidly, thus extending the service life of the motor; 2. The rotor motor can be fully contacted with the lubricating oil, and the setting of multiple sealing rings can prevent the lubricating oil from entering the stator coil. The rotor rotates in the lubricating oil, taking away the heat generated by the rotor, thus improving the motor efficiency; 3. The rear half end of the main shaft is a hollow structure, and an oil inlet hole is provided thereon. The lubricating oil can flow into the hollow structure of the main shaft, and the heat generated by the stator coil can be taken away through the lubricating oil circulation, thus improving the motor efficiency; 4. Heat dissipation holes are reserved on the driving wheel to export the internal heat, improve the motor efficiency, solve the problem that the existing wheel motor has weak heat dissipation ability and cannot be cooled in time during operation, thus accelerating the loss of the hub and increasing the use cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention, where: Figure 1 is a schematic cross-sectional structure diagram of an energy-saving outer rotor motor structure of the present invention; Figure 2 is a schematic diagram of the driving wheel in the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0016] The technical solutions in the embodiments of the present invention are described clearly and completely below. 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.

[0017] See also Figure 1-2 , Embodiment of the present invention: An energy-saving outer rotor motor structure, comprising: a main shaft 1, an end cover 2 sleeved on the main shaft and a moving wheel 3 fastened to the end cover by screws, a stator coil 4, a rotor 5 and a bracket 6 are sleeved on the outer end of the main shaft in sequence, a rubber ring 31 is arranged on the end of the main shaft extending out of the end cover to ensure the sealing of the shaft end, a third bearing 7 is arranged between the bracket and the moving wheel to reduce the axial size, make the motor compact and improve the volume efficiency, the rotor is rotatably connected to the main shaft through the second bearing 8, a magnetic ring 9 is connected to the side of the rotor close to the stator coil, with the main shaft as the center, the power cord is passed through the through hole in the main shaft, so that the power cord can be connected to the stator coil, the rotor and the center wheel 10 are tightened and fixed by bolts, and the rotor can be sleeved and fixed with the second bearing to achieve connection with the main shaft, after the rotor is fixed, the magnetic ring connected on its inner side can be in the same vertical line with the stator coil.

[0018] Specifically, a double planetary gear 12 is connected to the bracket through a support column 11. A two-stage planetary gear is used to improve the transmission ratio and the volume power of the motor. A gear ring 13 is provided inside the driving wheel. The center wheel is meshed with the double planetary gear, and the double planetary gear is meshed with the gear ring. The center wheel is fixed to the rotor with screws 14. The rotation of the rotor drives the center wheel to rotate, and the center wheel drives the double gear and the gear ring to rotate. The gear ring is engaged with the groove on the inner side of the driving wheel, thereby driving the rotation of the driving wheel and ensuring the positioning stability of the gear ring.

[0019] Specifically, a first bearing 15 and a first sealing ring 16 are arranged between the rotor and the moving wheel, a liquid injection hole 17 is opened on the end cover, and a first cavity 18 on the left side of the rotor is filled with coolant, an oil filling hole 19 is opened on the moving wheel, and a second cavity 20 on the right side of the rotor is filled with lubricating oil. The liquid injection hole is blocked with a plugging screw, and the oil filling hole is locked with an oil plug screw to prevent oil leakage. The setting of multiple sealing rings can prevent lubricating oil from entering the stator coil. By adding coolant to the first cavity of the motor and lubricating oil to the second cavity, the heat generated by the electronic coil can be cooled down faster, thereby extending the service life of the motor. The rotor rotates in the lubricating oil, and the motor can fully contact with the lubricating oil to take away the heat generated by the rotor, thereby improving the efficiency of the motor.

[0020] Specifically, one end of the main shaft extending into the second cavity is a hollow structure, forming a shaft heat dissipation cavity. An oil inlet hole is opened at one end of the main shaft, so that the oil inlet hole communicates with the heat dissipation cavity of the hollow structure. Lubricating oil can flow into the hollow structure of the main shaft, and the heat generated by the stator coil can be taken away through the lubricating oil circulation, improving the motor efficiency. Further preferably, a number of heat dissipation holes 21 are provided in the circumferential direction of the driving wheel, which can lead out the internal heat, accelerate the heat dissipation, and improve the efficiency of the motor.

[0021] Specifically, a plain bearing 22 is provided between the central wheel and the bracket. The two sides of the bracket are connected to the main shaft through a snap ring 23 and a retaining ring 24, and a rubber pad 25 is provided between the retaining ring and the plain bearing. The plain bearing and the rubber pad abut against the central wheel, which can prevent displacement and increase the working stability of the motor.

[0022] Specifically, a fourth sealing ring 26 is provided on the side of the rotor away from the first cavity, which can prevent the lubricating oil from leaking into the stator coil.

[0023] Specifically, the double planetary gear is rotatably connected to the support column through a fourth bearing 27. A second sealing ring 28 is provided between the end cover and the driving wheel, and a third sealing ring 29 is provided between the end cover and the main shaft, which can prevent external dust and water from entering the motor interior.

[0024] Specifically, a Hall plate 30 is provided on the stator coil and is externally connected to a controller to transmit signals. Preferably, a servo precision encoder 32 can be installed on the end cover to accurately control the starting and stopping positions of the motor.

[0025] The beneficial effects of the energy-saving outer rotor motor structure of the present invention are as follows: By adding coolant in the first cavity of the motor and adding lubricating oil in the second cavity, the heat generated by the electronic coil can be cooled down more quickly, extending the service life of the motor. The setting of multiple sealing rings can prevent the lubricating oil from entering the stator coil. The rotor rotates in the lubricating oil, taking away the heat generated by the rotor, improving the motor efficiency. An oil inlet hole is provided on the rear half end of the main shaft, and the lubricating oil can flow into the hollow structure of the main shaft, and the heat generated by the stator coil can be taken away through the lubricating oil circulation, improving the motor efficiency. Heat dissipation holes are reserved on the driving wheel to lead out the internal heat, improving the motor efficiency, solving the problem that the existing wheel motor has weak heat dissipation ability and cannot be cooled in time during operation, thus accelerating the loss of the hub and increasing the use cost.

[0026] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification of the present invention, or directly or indirectly applied to other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. An energy-saving outer rotor motor structure, characterized in that: include: A main shaft, an end cover sleeved on the main shaft and a moving wheel fastened to the end cover by screws, a stator coil, a rotor and a bracket are sleeved on the outer end of the main shaft in sequence, a third bearing is arranged between the bracket and the moving wheel, the rotor is rotatably connected to the main shaft through a second bearing, a magnetic ring is connected to the side of the rotor close to the stator coil, a center wheel is fixedly connected to the rotor, a double-coupled planetary gear is connected to the bracket through a support column, a gear ring is clamped inside the moving wheel, the center wheel and the double-coupled planetary gear are meshed, the double-coupled planetary gear is meshed with the gear ring, a first bearing and a first sealing ring are arranged between the rotor and the moving wheel, an injection hole is opened on the end cover, and a first cavity on the left side of the rotor is filled with coolant, an oil filling hole is opened on the moving wheel, and a second cavity on the right side of the rotor is filled with lubricating oil.

2. The energy-saving outer rotor motor structure according to claim 1, characterized in that: A plugging screw is installed on the liquid injection hole, and an oil plug screw is installed on the oil supply hole.

3. The energy-saving outer rotor motor structure according to claim 1, characterized in that: One end of the main shaft extending into the second cavity is a hollow structure, and an oil inlet hole is arranged on one end of the main shaft, and the oil inlet hole is connected with the hollow structure.

4. The energy-saving outer rotor motor structure according to claim 1, characterized in that: The moving wheel is provided with a plurality of heat dissipation holes along the circumferential direction.

5. The energy-saving outer rotor motor structure according to claim 1, characterized in that: A plane bearing is arranged between the central wheel and the bracket.

6. The energy-saving outer rotor motor structure according to claim 5, characterized in that: The two sides of the bracket are connected to the main shaft through a clamping spring and a clamping ring, and a rubber pad is arranged between the clamping ring and the plane bearing.

7. The energy-saving outer rotor motor structure according to claim 1, characterized in that: A fourth sealing ring is arranged on a side of the rotor away from the first cavity.

8. The energy-saving outer rotor motor structure according to claim 1, characterized in that: The double planetary gear is rotatably connected to the support column via a fourth bearing.

9. The energy-saving outer rotor motor structure according to claim 1, characterized in that: A second sealing ring is arranged between the end cover and the moving wheel, and a third sealing ring is arranged between the end cover and the main shaft.

10. The energy-saving outer rotor motor structure according to claim 1, characterized in that: A Hall plate is arranged on the stator coil.

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