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Wheel hub motor with variable reduction ratio for electric bicycle

A technology for electric bicycles and reduction ratios, which is applied in the direction of electric components, electromechanical devices, electrical components, etc., can solve the problems of electric bicycle endurance, starting, and climbing ability at the same time, so as to expand the range of optimal efficiency and save power The effect of cruising distance and maintaining battery performance

Active Publication Date: 2016-08-24
严振华
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the deficiencies in the prior art, the present invention provides a hub motor with a variable reduction ratio for electric bicycles, which changes the defect that the hub motor in the prior art has only one reduction ratio, and realizes One of the two reduction ratio outputs can be selected for use, which solves the problem that the battery life of the electric bicycle cannot be combined with the starting and climbing capabilities

Method used

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  • Wheel hub motor with variable reduction ratio for electric bicycle
  • Wheel hub motor with variable reduction ratio for electric bicycle
  • Wheel hub motor with variable reduction ratio for electric bicycle

Examples

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Embodiment 1

[0031] see attached Figure 4 , attached Figure 11 , the differential planetary gear reduction mechanism includes a rotor 6, a planet carrier 18, several magnets 7, a first sun gear 9, three first planet gears 10, a second sun gear 11, three second planet gears 12, The third sun gear 13, three third planetary gears 14, the second sun gear output sleeve 22, the third sun gear output sleeve 20, the large reduction ratio output one-way overrunning clutch 23, the small reduction ratio output one-way overrunning clutch 21, The first sun gear is keyed to the main shaft, and the main shaft 17 is supported on the left and right hub housings 25, 1 through the left and right hub housing bearings 24, 2 respectively, and the left and right hub housings 25, 1 and the intermediate housing 3 form an integral hub housing . The rotor is supported on the left side hub shell through the rotor support bearing 19, the magnet is fixed on the outer circumference of the rotor, and the planetary wh...

Embodiment 2

[0035] see attached Figure 5 , attached Figure 12, the rotor is supported on the left hub shell through the rotor support bearing, the planetary wheel support shaft is fixedly connected to the rotor and the two planetary carriers fixedly connected to it, and the first planetary wheel, the second planetary wheel are sleeved on the planetary wheel support shaft Two planetary wheels, planetary wheel support bearings, planetary wheel connection spline sleeves, the first planetary wheel and the second planetary wheel are supported on the planetary wheel support shaft through the planetary wheel support bearing, and the first planetary wheel and the second planetary wheel are supported by the planetary wheel The spline sleeve is connected to form an integral body, the inner ring of the first sun gear is keyed to the main shaft, and the outer teeth mesh with the first planetary gear to form the power input assembly of the first planetary gear; the inner ring of the second sun gear ...

Embodiment 3

[0038] see attached Figure 6 , attached Figure 12 The right side of the rotor is supported on the stator fixed frame through the rotor support bearing, and the left side is supported on the left hub shell through the small reduction ratio output one-way overrunning clutch. The planetary wheel support shaft is connected, and the planetary wheel support shaft is covered with the first planetary wheel, the second planetary wheel, the planetary wheel support bearing, the planetary wheel connection spline sleeve, the first planetary wheel and the second planetary wheel through the planetary wheel support bearing Supported on the support shaft of the planetary wheel, the first planetary wheel and the second planetary wheel are keyed together through the planetary wheel connection spline sleeve, the inner ring of the first sun wheel is keyed to the main shaft, and the outer teeth mesh with the first planetary wheel , the inner ring of the second sun gear is keyed to one end of the...

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Abstract

A reduction ratio variable hub motor for an electric bicycle. The hub motor comprises a main shaft (17), a housing, a stator (5) and a rotor (6). A differential planetary gear speed reducing mechanism and an output selecting mechanism are disposed in the radial interior of the rotor (6). The differential planetary gear speed reducing mechanism and the rotor (6) are integrated into one through a planetary carrier (18). The output selecting mechanism comprises two one-way overrunning clutches (21, 23). The inner ring of each one-way overrunning clutch (21, 23) is fixedly connected to an output sleeve (20, 22) of the differential planetary gear speed reducing mechanism. The outer ring of the one-way overrunning clutch (21, 23) is fixedly connected to a hub housing (25). The two one-way overrunning clutches (21, 23) have the same power transmission direction. By means of one driving mechanism and two output mechanisms, the hub motor can output power at two different rotating speeds, so the problem that an electric bicycle has poor starting ability and poor climbing ability is solved.

Description

technical field [0001] The invention belongs to a wheel hub motor, in particular to a wheel hub motor with a variable reduction ratio for an electric bicycle. Background technique [0002] At present, the number of electric bicycles in my country has exceeded 200 million, and it has an increasing trend year by year. Existing hub motors of electric bicycles can be roughly divided into two categories, one is a direct drive mode, and the other is a deceleration drive mode. No matter which mode, its common point is a fixed reduction ratio. The motor is initially designed with only one speed for optimum efficiency. If it is designed for the best efficiency when driving at high speed, the low-speed performance is very poor, that is, the ability to start climbing is poor; if it is designed for the best efficiency when starting and climbing, the performance at high speed is very poor, that is, it consumes electricity. There is only a trade-off between high-speed and low-speed char...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K7/116F16H3/70
CPCF16H3/70H02K7/116
Inventor 严振华
Owner 严振华
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