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Electric-assist bicycle

An electric assist, bicycle technology, applied to bicycle accessories, bicycle gear shifting mechanisms, vehicle components, etc., can solve the problems of wire elongation, inability to switch the shifting mechanism, and hindering the hand holding the handle, etc.

Inactive Publication Date: 2017-12-01
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] However, in this case, it is necessary to install a shift-level wire transmission mechanism (so-called shift fork) that changes the operation of the operation lever into the action of the wire on the handlebar. This shift-level wire transmission mechanism may hinder the grip. The movement of the hand holding the handle
In addition, when used for many years, the metal wire will stretch, and the switching operation to the transmission mechanism may not be performed satisfactorily.

Method used

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Examples

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Embodiment Construction

[0047] Next, a power-assisted bicycle according to an embodiment of the present invention will be described based on the drawings. In addition, the left-right direction and the front-rear direction in the following description refer to the direction in the state which rides on this electrically-assisted bicycle 1 toward a forward direction. In addition, the structure of the present invention is not limited to the structures described below.

[0048] figure 1 A motor-assisted bicycle according to an embodiment of the present invention is shown. Such as figure 1 As shown, this power-assisted bicycle 1 includes a metal frame 2 composed of a head tube 2a, a front fork 2b, an upper tube 2c, a down tube 2g, a seat tube 2d, a chainstay 2e, a seat frame 2f, and the like. In addition, it includes a front wheel 3 rotatably attached to the lower end of the front fork 2b, a rear wheel 4 rotatably attached to the rear end of the chain stay 2e, a handle 5 for changing the direction of ...

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Abstract

A drive unit (20) positioned in an intermediate location between a front wheel and a rear wheel is provided with: a resultant force vehicle (29) capable of rotating as a result of the resultant force obtained by synthesizing a human-powered drive force and an auxiliary drive force; a drive sprocket (13) to which the rotations of the resultant force vehicle (29) are transmitted; and a shifting mechanism that transmits drive force to the resultant force vehicle and has a plurality of selectable gears, the gear ratio of which differs. The shifting mechanism has a plurality of gears and a switch movement unit (62) that moves according to the selected gear. In addition, the drive unit (20) is provided with an electric-power switching device that has a gear-switching motor that functions as a gear-switching drive source for producing drive force that moves the switch movement unit (62).

Description

technical field [0001] The present invention relates to a power-assisted bicycle provided with a drive unit. Background technique [0002] There is known a motor-assisted bicycle that has a motor powered by an accumulator such as a storage battery, detects a human-powered driving force composed of pedaling force applied to the pedals, and adds an auxiliary driving force of the motor corresponding to the human-powered driving force. (assist force), thereby enabling easy travel even when going uphill or the like. [0003] As a drive unit of an existing electrically assisted bicycle, for example, such as Figure 31 As shown, there is a driving unit having the following structure, which includes a human power drive system having a crankshaft 201 and a motor drive system in which the output of the motor 202 increases or decreases according to the pedaling force applied to the crankshaft 201, and rotates a cylindrical resulting force shaft 203. It is freely arranged on the same a...

Claims

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Application Information

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IPC IPC(8): B62M6/55B62M11/06B62M25/08F16D41/24F16H63/30
CPCB62M6/55B62M11/06B62M25/08F16H63/30B62M25/02F16H61/32F16D41/30F16D41/26
Inventor 川上将史藤井直起西森雅人
Owner PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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