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drive unit for bicycle

A drive unit, bicycle technology, applied in the direction of rider drive, vehicle components, vehicle gearbox, etc., can solve the problem of drive unit enlargement

Active Publication Date: 2016-03-30
SHIMANO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the drive unit of the bicycle disclosed in Patent Document 1, the crankshaft 20, the rotating shaft of the motor, and the shaft 30 that holds the gears 32 and 34 provided on the power transmission path between the crankshaft 30 and the sprocket 28 are separately provided, so the drive unit get bigger

Method used

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Examples

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Embodiment Construction

[0037] figure 1 It is a right side view showing an example of a power-assisted bicycle incorporating the drive unit 1 according to the first embodiment of the present invention. This power-assisted bicycle transmits the pedaling force acting on the pedals 100 to the hub provided rotatably around the axle 106 of the rear wheel via the path of the crank arm 101→drive unit 1→front sprocket 103→chain 104→rear sprocket 105. body. During this process, the electrically assisted bicycle synthesizes the output of the motor as auxiliary power to assist driving. In this motor-assisted bicycle, a sensor unit described later detects a force corresponding to a torque acting on the crankshaft 102 of the drive unit 1 . In addition, when the detected value exceeds the set value, the motor-assisted bicycle drives the motor to generate a torque corresponding to the pedaling force as assist power. The drive unit 1 including an auxiliary motor is generally arranged near the connection portion b...

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PUM

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Abstract

The invention refers to a bicycle drive unit with a motor for assisting driving, thereby realizing light weight and compactness. The drive unit comprises a crankshaft; a motor capable of configuring the hole of the crankshaft; a force transmission shaft separated from the crankshaft, and transferring rotation of the crankshaft; and an output part transferring the rotation of the force transmission shaft and summing the motor outputting.

Description

technical field [0001] The present invention relates to a drive unit of an electric assist bicycle using a motor output as auxiliary power. Background technique [0002] There is an invention described in Patent Document 1 as a motor-assisted bicycle that uses a motor output as auxiliary power. In the electric-assisted bicycle disclosed in Patent Document 1, the pedaling force received on the pedals is transmitted, the transmitted driving force is combined with the driving force from the motor, and the combined driving force is transmitted to the rear wheel. [0003] Patent Document 1: German Patent DE102010028667 [0004] In the bicycle drive unit of Patent Document 1, the crankshaft 20, the rotating shaft of the motor, and the shaft 30 that holds the gears 32 and 34 on the power transmission path between the crankshaft 30 and the sprocket 28 are provided separately, so the drive unit get bigger. Contents of the invention [0005] The present invention has been made in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B62M6/55
CPCB62M11/145
Inventor 渡会悦义
Owner SHIMANO INC