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Electric assist bicycle

A technology for electric power assist and bicycles, which is applied to vehicle components, rider driving, transportation and packaging, etc., to achieve the effect of extending the service life

Active Publication Date: 2017-05-10
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] In addition, since the structure uses a dedicated chain as a mechanism for transmitting driving force to the rear wheel and a front derailleur that switches gears, it is difficult to replace the chain with a toothed belt in an external transmission.

Method used

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  • Electric assist bicycle
  • Electric assist bicycle
  • Electric assist bicycle

Examples

Experimental program
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Embodiment Construction

[0056] Hereinafter, an electric assist bicycle according to an embodiment of the present invention will be described based on the drawings. In addition, the left-right direction and front-rear direction in the following description refer to the direction in the state which faces the traveling direction and rides on this electric assist bicycle 1. In addition, the structure of this invention is not limited to the structure demonstrated below.

[0057] figure 1 , figure 2 1 in it is the electric power-assisted bicycle according to the embodiment of the present invention. Such as figure 1 , figure 2 As shown in FIG. The front wheel 3 at the lower end of the front fork 2b; the rear wheel 4 rotatably attached to the rear end of the chain stay 2e; the handlebar 5 for changing the direction of the front wheel 3; the seat 6; 7 and a pedal 8; an electric motor 21 (refer to Figure 4 etc.) and the control unit 24 that performs various electrical controls including the motor 2...

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PUM

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Abstract

Provided is an electric assist bicycle that can add sufficient auxiliary drive force while enabling smooth speed change and preventing an increase in the frequency of replacing components such as the chain, that causes no interference problem between a mount or a battery and a front derailleur, and that does not require the development of a dedicated front derailleur. A crank shaft (7a) to which human power drive force from pedals is transmitted and a motor (21) are disposed so as to rotate about mutually different axes. On an outer periphery of the crank shaft (7a), a human power transmission member (29) to which the human power drive force is transmitted is disposed. On the outer periphery of the crank shaft (7a), a combined force transmission member (29) to which combined force combining the human power drive force and auxiliary drive force from the motor (21) is transmitted is disposed. The motor drive unit (20) is provided with a planetary gear mechanism (50) for changing the speeds of the combined force combining the human power drive force and the auxiliary drive force from the motor (21).

Description

technical field [0001] The present invention relates to an electric assist bicycle capable of traveling by adding an auxiliary driving force generated by an electric motor to a human driving force generated by pedaling force. Background technique [0002] There is known an electric power-assisted bicycle that has a motor powered from an accumulator such as a battery, uses a torque sensor to detect the human driving force consisting of pedaling force applied to the pedals, and adds assistance from the motor corresponding to the human driving force. The driving force (assist power) enables easy driving even when going uphill. [0003] In this electrically assisted bicycle, there is a configuration in which a motor drive unit incorporating a motor and the like is arranged at a portion where a crankshaft is provided. In the electric assist bicycle configured in this way, the heavy motor drive unit is arranged at a lower position in the front-rear direction center of the electri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B62M6/55
CPCB62M6/50B62M6/55
Inventor 川上将史
Owner PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD