Ultra-small coreless brushless high-efficiency hub motor

Abstract

The invention discloses an ultra-small coreless brushless high-efficiency hub motor, and the motor consists of an axle motor and a hub speed reducer. The axle motor is a coreless brushless bipolar permanent magnet DC motor, and is high in efficiency, is small in size, is light in weight and has no magnetic resistance. The axle motor also serves as a left half shaft of a hub. The hub speed reducer is a high-efficiency two-stage planetary gear speed reduction mechanism which is disposed on a right half shaft in a hub housing, and is an independent speed reducer which is fully sealed by an aluminum alloy hub housing. The motor has the excellent conditions for using liquid lubricating oil, and enables the oil not to be leaked easily. The remarkable advantages of the motor used on an electric bicycle also can be reflected by the motor used on an electric motorcycle and an electro-tricycle. Because the motor is high in efficiency, small in size and light in weight, the motor meets the most basic demands of various types of electric vehicles. According to the different requirements of power and mechanical strength of the motors, different types of hub motors can be developed.

Description

technical field [0001] The invention relates to a hub motor, specifically, an ultra-small iron-coreless, brushless, high-efficiency hub motor. Background technique [0002] The current light electric bicycles generally use various types of mini hub motors. The disadvantages of this type of motor are: 1. The hub is small, and the built-in planetary gear reduction mechanism and motor components are compactly set in a limited space. The gear reduction ratio cannot be large, and the motor speed cannot be increased, so they cannot achieve the ideal goal of maximizing efficiency, minimizing volume, and weight. 2. The axial size of the existing mini hub motor is not small enough to meet Can not meet the requirement that the bicycle wheel frame has a small crotch opening. 3. The planetary gear reduction mechanism and the motor components are installed in the wheel hub together, and liquid lubricating oil cannot be used, the gear lubrication effect is not good, and the gear wears qu...

AI Technical Summary

Problems solved by technology

[0002] The current light electric bicycles generally use various types of mini hub motors. The disadvantages of this type of motor are: 1. The hub is small, and the built-in planetary gear reduction mechanism and motor components are compactly set in a limited space. The gear reduction ratio cannot be large, and the motor speed cannot be increased, so they cannot achieve the ideal goal of maximizing efficiency, minimizing volume, and weight. 2. The axial size of the existing mini hub motor is not small enough to meet Can not meet the requirement of small crotch opening of bicycle wheel frame

3. The planetary gear reduction mechanism and the motor components are installed in the hub together, and liquid lubricating oil cannot be used, the gear lubrication effect is not good, and the gear wears quickly

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