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Mid motor with variable reduction ratio for electric bicycle

A technology of electric bicycles and mid-mounted motors, applied to bicycles, motor vehicles, electromechanical devices, etc., to achieve the effects of strong climbing ability, low energy consumption, and stable and reliable force transmission

Active Publication Date: 2015-09-30
严振华
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to overcome the deficiencies in the prior art, and provides a middle motor with a variable reduction ratio for electric bicycles, which changes the defect that the middle motor can only output a single reduction ratio, and through the forward and reverse rotation of the motor rotor, The output of two different deceleration ratios, high and low, can be randomly selected to achieve the effect of both the battery life of the electric bicycle and the ability to start and climb.

Method used

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  • Mid motor with variable reduction ratio for electric bicycle
  • Mid motor with variable reduction ratio for electric bicycle
  • Mid motor with variable reduction ratio for electric bicycle

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Experimental program
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Effect test

Embodiment 1

[0024]See the accompanying drawings for details. Compared with the prior art, the present invention provides a middle motor with a variable reduction ratio for an electric bicycle, including a housing, a motor 3, a primary pinion 5, a primary gear 6, two Stage pinion 7, stage two bull gear 8 and power output sleeve 24, described stage one pinion is keyed on the motor output shaft 4, and described stage one pinion meshes with stage one bull gear, and the stage one stage bull gear The secondary small gear of the shaft meshes with the secondary large gear, the primary large gear and the secondary small gear are keyed to the gear support shaft 9, and the gear support shaft passes through the right gear support bearing 10 and the left gear support bearing 10-1 respectively It is supported on the right side case 28 and the middle case 31 . The inner ring of the power output sleeve 24 is supported by the support bearing 30 of the power output sleeve, and its outer ring is supported o...

Embodiment 2

[0027] On the basis of Embodiment 1, a three-stage reduction gear is added, and the housing of the middle motor can be directly inserted into the bottom bracket 51, and the bottom bracket connection part 31-1 of the middle casing runs through the main shaft, and is connected through the bottom bracket of the middle casing. The support bearing 49 on the right side of the part, the support bearing 49-1 on the left side of the five-way connection part of the middle shell, the left support bearing is locked with the bearing lock nut 50, and the middle shell is connected with the five-way lock by the five-way lock nut 52 tight. Embodiment 2 is suitable for existing ordinary bicycles, and ordinary bicycles can be converted into electric bicycles under the condition that the frame structure of the whole vehicle remains unchanged.

[0028] Specifically optimize the structure, the middle output ring of the double-layer one-way overrunning clutch is fixedly connected with a three-stage ...

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Abstract

The invention relates to a mid-motor with variable reduction ratios for an electric bicycle. The mid-motor comprises a casing, a motor, a primary large gear, a primary pinion, a secondary large gear, a secondary pinion and a power output bushing, and is characterized in that the secondary large gear is fixedly connected with a double-layer one-way overrunning clutch and a differential planetary gear speed reducing mechanism, and the secondary large gear rotates reversely to drive a middle output ring of the double-layer one-way overrunning clutch and the power output bushing to constitute a low-speed output mechanism through the differential planetary gear speed reducing mechanism and an inner ring of the double-layer one-way overrunning clutch; the secondary large gear rotates forwards to drive the middle output ring of the double-layer one-way overrunning clutch and the power output bushing to constitute a high-speed output mechanism through an outer ring of the double-layer one-way overrunning clutch. The mid-motor has the benefits as follows: one driving mechanism and two output mechanisms are adopted to enable the hub motor to output two kinds of power with different reduction ratios, the defect that the motor of the conventional electric bicycle only has a single fixed reduction ratio is overcome, and the problem of poor starting capacity and climbing capacity of the electric bicycle is solved.

Description

technical field [0001] The invention belongs to a central motor, in particular to a central motor with a variable reduction ratio for an electric bicycle. Background technique [0002] At present, the electric bicycle is not only used as a means of transportation, but also as a sports tool, which is favored by the majority of cycling enthusiasts. A bicycle with a central motor has a stable center of gravity and a strong sense of riding safety, and is mainly used in sports mountain electric bicycles. The main purpose of riding a sports mountain electric bicycle is sports and entertainment, especially to enjoy the sense of speed of high-speed riding on flat ground and the sense of power and excitement of riding on steep roads such as mountain climbing. To meet the above requirements, the working efficiency range of the motor is required to be very large, that is, it must meet both high-speed characteristics and low-speed high-torque characteristics. In order to meet the abov...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K7/10H02K7/116B62M6/45B62M7/02
Inventor 严振华
Owner 严振华
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