Gear hub motor lubricated by liquid lubricating oil

Abstract

The invention discloses a gear hub motor lubricated by liquid lubricating oil. The gear hub motor comprises a left end cover, a right end cover, a main shaft an a hub, wherein the left end cover sleeves the main shaft through a first bearing and a first oil seal; an oil filling opening is formed in the left end cover, the right end cover or the hub; the right end cover sleeves the main shaft through a second bearing and a second oil seal; the left end cover is connected with the right end cover through a seal ring and the hub; the left end cover is connected with a solar gear ring through a reducing mechanism; the solar gear ring is fixed on the motor; and the solar gear ring is driven to rotate through the motor, so that the left end cover is driven to rotate through the reducing mechanism to drive the hub to rotate. A two-stage reduction planetary gear reducer mechanism is adopted under the premise of keeping a through shaft structure, so that the reliability of the hub motor structure is ensured; the high-speed performance of a disc-type coreless DC motor can be fully developed; the reducing mechanism is lubricated by the liquid lubricating oil; and the transmission efficiency of the motor is high.

Description

technical field [0001] The invention relates to a geared hub motor lubricated by liquid lubricating oil, belonging to the field of motors. Background technique [0002] Electric bicycles have geared hub motors. Generally, a high-speed drive motor is placed in the hub, and a planetary gear reduction mechanism is used to drive the hub to rotate. A fixed-axis planetary gear reduction mechanism with one-stage reduction is adopted, and a single To the overrunning clutch, the bicycle using this kind of hub motor retains the sliding ability and pedaling function of the bicycle, but the mileage of the bicycle has not been substantially improved. It is a low-speed hub motor with a reduced diameter, and its speed generally does not exceed 1500 rpm. Strictly speaking, it is not a high-speed motor. The reduction ratio is usually 1:4.3, and the hub motor has poor adaptability to the wheel diameter. , and the drive motor built in the hub, its windings, permanent magnets, etc. are open in...

AI Technical Summary

Problems solved by technology

[0006] Patent No. 201310310431.3 discloses a disc-type coreless permanent magnet brushless DC motor, which adopts a ring-shaped coil winding similar to that of the disc-type coreless permanent magnet DC motor disclosed in Application No. 201310033295.8. The arc radius is 1.5-2 times of the arc radius near the shaft end, the arc radius of the two waistlines is 3-5 times of the arc radius away from the shaft end, the space utilization rate of the stator plate is very low, and the magnetic field concentration is even worse , and the coil winding lacks a limit device, it is difficult to limit the displacement of the coil in the axial direction; the motor of this invention adopts a disc-type coreless DC motor with an outer rotor shell rotating, the purpose of the invention is not clear, and four O-shaped seals are set The pertinence of the ring is not strong, the motor lacks a power output device and a fixing device, and it seems inappropriate to use two kinds of bearings with different specifications on the motor shaft.

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