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electric bicycle

A technology for electric bicycles and electric motors, which is applied to vehicle components, vehicle gearboxes, rider drives, etc., can solve the problems of the front sprocket 108 and the chain 110 falling off and the loose state becoming larger, so as to prevent the chain from falling off and improve reliability. Effect

Active Publication Date: 2016-08-10
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, problems such as contact between the upper portion 110a of the slack chain 110 and the vehicle body, etc., or when the reverse wheel brake is released to switch the crank 102 and the front sprocket 108 from reverse rotation to forward rotation, a problem occurs. Chain drop of front sprocket 108 and drop of chain 110
[0016] In addition, after the chain 110 has been used for a long time, it will elongate due to changes over time, and the slack state will become larger. If tension is applied not only to the upper part 110a of the chain 110 but also to the lower part 110b, the slack state may further increase. Big

Method used

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Embodiment Construction

[0064] Hereinafter, an electric bicycle according to an embodiment of the present invention will be described based on the drawings.

[0065] figure 1 , figure 21 is the electric bicycle according to the embodiment of the present invention. Such as figure 1 , figure 2 As shown, the electric bicycle 1 is provided with: a metal frame 2 composed of a head pipe 2a, a front fork 2b, a main pipe 2c, a seat pipe 2d, a chain bracket 2e, a seat bracket 2f, etc.; it is rotatably attached to the front fork 2b The front wheel 3 at the lower end of the lower end; the rear wheel 4 that is installed on the rear end of the chain bracket 2e freely rotatably; the handle 5 that changes the direction of the front wheel 3; the vehicle seat 6; the crank 7 and the pedal 8; ) as a driving source, and a motor drive unit 10 provided with a control unit that performs various electrical controls including the motor; a battery 12 composed of a secondary battery that supplies driving power to the m...

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Abstract

The present invention provides an electric bicycle capable of preventing the chain (15) from falling off even when a tension force acts on the chain (15) to move the tension sprocket (45) in a direction opposite to the direction in which the force is applied And situations such as coming off of chain (15). The electric bicycle of the present invention is provided with a tensioner that increases the winding angle of the chain (15) relative to the auxiliary drive sprocket (29) and applies tension based on an acting force to the chain (15) to absorb slack in the chain (15) ( 40), with a position adjustment mechanism (50), which acts on the chain (15) in an adjustable state to make the tensioning sprocket (45) move in the opposite direction of its force-applying direction. , The limit position of the movement of the tensioning sprocket (45) is limited.

Description

technical field [0001] The invention relates to an electric bicycle, especially an electric bicycle with a tensioning device. Background technique [0002] There is known an electric bicycle (electrically assisted bicycle) that has an accumulator such as a storage battery and a motor powered by the accumulator, detects the pedaling force applied to the pedals by a pedaling force detector such as a torque sensor, By adding the auxiliary driving force (assist force) of the above-mentioned electric motor to the driving force, it is possible to travel easily even on uphill slopes. [0003] In this electric bicycle, such as Figure 23 , Figure 24 As shown, a motor drive unit 101 incorporating a motor or the like for generating auxiliary driving force is arranged in the vicinity of the crankshaft 102a such as behind the crankshaft 102a. The electric bicycle of this disposition structure owing to be equipped with the heavy motor drive unit 101 at the center (that is, the interme...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B62M6/70B62M6/50B62M9/16
CPCB62M9/16B62M6/50B62M6/70
Inventor 森冈孝浩谷田正人
Owner PANASONIC CORP
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