Electric assisted bicycle

An electric power assist and bicycle technology, which is applied to bicycles, two-wheeled bicycles, transmission elements, etc., can solve problems such as troublesome operation, and achieve the effects of reduced manufacturing cost, good reliability, and simple structure.

Active Publication Date: 2017-04-26
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0023] However, in this way, various advantages can be obtained by providing a so-called built-in transmission on the single-shaft drive unit. On the other hand, it has the disadvantage of troublesome operation because it is necessary to manually switch the gear stage when changing the gear.

Method used

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  • Electric assisted bicycle
  • Electric assisted bicycle
  • Electric assisted bicycle

Examples

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Embodiment Construction

[0070] 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 the front-rear direction in the following description refer to the direction in the state of riding the electrically-assisted bicycle 1 toward a traveling direction. In addition, the structure of this invention is not limited to the structure described below.

[0071] figure 1 , figure 2 1 is an electric assisted bicycle according to an embodiment of the present invention. Such as figure 1 , figure 2 As shown in FIG. The front wheel 3 attached to the lower end of the front fork 2b, the rear wheel 4 rotatably attached to the rear end of the chain support 2e, the handlebar 5 for changing the direction of the front wheel 3, the seat 6, and human power driven by pedaling force. Power crank 7 and pedal 8, electric motor 21 (refer to Figure 4 etc.) and the control unit 24 for controlling variou...

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PUM

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Abstract

Provided is an electric assisted bicycle with a configuration wherein a drive unit for internally combining human powered drive force and auxiliary drive force is fitted with an interior transmission with automatically switchable speed-change stages. A drive unit disposed at an intermediate position between a front wheel and a rear wheel is internally fitted with a transmission mechanism (25) that transmits combined force of human powered drive force and auxiliary drive force from a motor while changing speeds by switching the combined force to a plurality of stages. The transmission mechanism (25) is fitted with a speed-change weight (81) of which the posture is changed in accordance with a centrifugal force when being rotated, and configured such that as the rotation speed of a crank shaft (7a) increases, the posture of the speed-change weight (81) is changed so as to be switched from low speed stage side to high speed stage side.

Description

technical field [0001] The present invention relates to an electric assist bicycle that can run 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 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 driving even when going uphill. [0003] In this electrically assisted bicycle, there is a configuration in which a drive unit incorporating a motor or the like is disposed at a portion where a crankshaft is provided. In the electric assist bicycle with such an arrangement structure, the heavy drive unit is arranged at a lower position in the center of the electric assist bic...

Claims

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Application Information

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IPC IPC(8): B62M6/55F16D43/16F16D47/04F16H3/083
CPCB62M6/55F16D43/16F16D47/04F16D2043/145B62M11/06F16H61/0295F16H3/10F16H3/089B60Y2200/13F16H2200/0034F16D41/26F16D41/30
Inventor 川上将史
Owner PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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