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electric assist bike

A technology for electric assistance and bicycles, which is applied to vehicle components, rider driving, transportation and packaging, etc. It can solve the problems of reducing the torque detection ability, and achieve the effects of suppressing the possibility of deformation, simple control, and good reliability

Active Publication Date: 2018-04-20
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] But when Figure 14 ~ Figure 16 In the shown motor drive unit 102, the magnetostrictive torque sensor 105 is in the vicinity, and the rotation sensor 115 or the cylinder (outside) 109 is provided with a permanent magnet or the like. Torque detection capability is reduced due to interference factors or noise during torque (human driving force)

Method used

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Embodiment Construction

[0049] Hereinafter, a motor-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 directions in a state in which the electrically assisted bicycle 1 is mounted facing the traveling direction, but the configuration of the present invention is not limited to the directions described below.

[0050] figure 1 , figure 2 1 in it is the motor-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 wheel; the rear wheel 4 rotatably mounted on the rear end of the chain bracket 2e; the handlebar 5 for changing the direction of the front wheel; the seat 6; ; An electric motor 21 (refer to Figure 4 ) and a control unit 24 that performs various electrical controls including the motor 21 (refer to Figure 4 ) and ...

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Abstract

An electric assist bicycle is provided so as to detect a torque by means of a magneto-striction torque sensor and keep high torque detection capability while detecting a rotation of a crank shaft or the like. The outer periphery of a crank shaft 7a has a cylindrical human power transmission member 28 having a torque sensor 31 for detecting a human driving force, an intermediate cylinder 23 that receives a human driving force transmitted from the human power transmission member 28, and an interlocking member 29 that receives the human driving force transmitted from the intermediate cylinder 23. A one-way clutch 30 is disposed between the intermediate cylinder 23 and the interlocking member 29. A rotation detector 10 is provided to detect a rotation of a rotating body 11 attached to the intermediate cylinder 23. The rotation detector 10 is an optical sensor.

Description

technical field [0001] The present invention relates to a motor-assisted bicycle that can be driven by a human driving force realized by pedaling force and an auxiliary driving force generated by an electric motor. Background technique [0002] There is known a motor-assisted bicycle that has a motor powered from an accumulator such as a storage battery, detects a human-powered driving force composed of a pedaling force applied to the pedals with a torque sensor, etc., and adds a motor that corresponds to the human-powered driving force. With the auxiliary driving force (assist force), it is possible to drive easily even when going uphill. [0003] For example, if Figure 14 As shown, in the motor-assisted bicycle, there is a structure in which a motor drive unit 102 including a built-in motor 101 and the like is disposed at a portion where a crankshaft 103 is provided (Patent Document 1, etc.). In the power-assisted bicycle 100 with such an arrangement structure, the relat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B62M6/50B62M6/55
CPCB62M6/50B62M6/55
Inventor 川上将史小泽聪藤井直起
Owner PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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