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crank gear for bicycles

A crank drive, bicycle technology, applied in wheel drive, vehicle parts, vehicle gearbox, etc.

Active Publication Date: 2017-07-18
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such a gearing results in the chainring no longer rotating at the speed of the bicycle

Method used

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  • crank gear for bicycles
  • crank gear for bicycles
  • crank gear for bicycles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] in the following according to Figures 1 to 3 An exemplary embodiment of the crank gear 1 according to the invention is explained in more detail.

[0017] figure 1 A bicycle 2 with crank gear 1 is shown. A driven wheel 4 in the form of a sprocket is situated on the crank gear 1 . Torque is transmitted via the driven wheel 4 to the rear wheel 5 of the bicycle 2 by means of a chain. A pedal 3 is attached to the crank gear 1 on both sides.

[0018] The rider can introduce torque into the crank gear 1 via these pedals 3 . To support the rider, crank drive 1 includes an electric motor 6 . A battery 7 is fixed on the frame of the bicycle 2 . This battery 7 feeds the electric motor 6 or the electric motor 6 can also be operated as a generator and thus feeds the battery 7 . Furthermore, a control and evaluation unit 8 is located on the bicycle 2 . Located on the steering gear of the bicycle 2 is a manual control 9 on which the rider can switch on and adjust the electric...

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PUM

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Abstract

The invention relates to a crank transmission (1) for a bicycle (2), comprising: a pedal shaft (9) for mounting two pedals (3) on the free end (10) of the pedal shaft (9) , 11); a driven wheel (4) for transmitting force to a wheel (5) of the bicycle (2); a sun gear (13), a ring gear (14), at least one planetary gear (15) and a planetary gear transmission (12) of a planetary carrier (16), wherein the planetary carrier (16) is fixed on the pedal shaft (9) in a non-rotatable manner; and a 1. A sensor (19) for obtaining the supporting moment of the ring gear (14).

Description

technical field [0001] The invention relates to a crank transmission for a bicycle, a bicycle with the crank transmission and a control device for an electric bicycle. The invention relates in particular to a crank gear for a bicycle with an electric auxiliary drive. Background technique [0002] It is partly desirable in bicycles to measure the torque generated directly by the rider on the pedals. Especially for bicycles with an electric auxiliary drive, the rider's desire for traction can be derived directly from the torque generated by the rider on the pedals. Torque sensors directly on the pedal shaft are common today for this purpose. These torque sensors are laborious and expensive. Transmissions are also known which determine the reaction forces in an intermediate shaft which forms part of a transmission between the pedal shaft and the driven chain pulley. Such a gearing results in that the chainring no longer rotates at the speed of the bicycle. The higher rotat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B62M6/50
CPCB62M6/50B62M6/55B62M11/145
Inventor M-P·博尔茨
Owner ROBERT BOSCH GMBH