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electric assist bicycle

A technology for electric power assist and bicycles, applied to bicycles, two-wheeled bicycles, transmission devices, etc., can solve problems such as troublesome operation, and achieve the effects of manufacturing cost suppression, simple structure, and realization of manufacturing costs

Active Publication Date: 2019-05-10
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[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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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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Abstract

The present invention provides an electric power-assist bicycle, which is configured such that a built-in transmission is provided in a drive unit for synthesizing human driving force and auxiliary driving force, and can automatically switch gears. In the driving unit arranged at the middle position between the front wheel and the rear wheel, a speed change mechanism (25) is provided which transmits the resultant force obtained by synthesizing the human driving force and the auxiliary driving force from the electric motor while performing multi-stage switching speed change. ), the speed change mechanism (25) is provided with a speed change counterweight (81) that changes its posture according to the centrifugal force during rotation, and when the rotation speed of the crankshaft (7a) increases, the speed change counterweight (81) The posture changes, switching from the low-speed stage side to the 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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Patent Type & Authority Patents(China)
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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