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Electrically assisted bicycle

An electric assist, bicycle technology, applied in vehicle components, rider drive, transportation and packaging, etc., can solve problems such as reducing torque detection capability, and achieve the effects of suppressing the possibility of deformation, simple control, and good reliability.

Active Publication Date: 2015-12-16
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 where 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 the...

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Abstract

Provided is an electrically assisted bicycle that can detect torque using a magnetostrictive torque sensor, and that can maintain satisfactory torque detection capability while detecting rotation of a crankshaft or the like. Placed on the outer periphery of a crankshaft (7a) are a tubular input transmission body (28) on which a torque sensor (31) for detecting input drive force is formed, an intermediate tube body (23) to which input drive force from the input transmission body (28) is transmitted, and a coupling body (29) to which input drive force from the intermediate tube body (23) is transmitted. Between the intermediate tube body (23) and the coupling body (29), a one-way clutch (30) is placed and there is provided a rotation detector (10) for detecting rotation of a rotating body (11) attached to the intermediate tube body (23), an optical sensor being used as the rotation detector (10).

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. The auxiliary driving force (assist force) can easily drive 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 arranged 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 relatively heavy motor dr...

Claims

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Application Information

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Patent Type & Authority Applications(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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