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Drive unit for electric bicycles

A technology of electric bicycles and drive units, which is applied in the direction of rider drive, vehicle components, vehicle gearboxes, etc., to achieve the effect of maintenance-free and light maintenance

Active Publication Date: 2019-06-14
何玲
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in order to monitor the maximum allowable motor supported speed, an additional speed measurement device is required

Method used

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  • Drive unit for electric bicycles
  • Drive unit for electric bicycles
  • Drive unit for electric bicycles

Examples

Experimental program
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Effect test

Embodiment Construction

[0023] In these embodiments, a 2-gear speed reducer is used. For simplicity, all components in the figure are shown in plan view.

[0024] The pedal force of the drive unit is transmitted via the crank arms 1a and 1b to the crankshaft 2 mounted in the housing. A spur gear integrated into the crankshaft drives the planetary carrier 3 with spur gear toothing of the planetary gears mounted on the shaft 19 . The planet carrier 3 and the planet gears 5 are connected by means of the shaft 4 in order to transmit the force to the ring gear 8 .

[0025] The output drive is realized through the hollow gear 8 . The sun gear 6 is connected to the sleeve 7 and is rotatably mounted on a shaft 19 . The torque generated on the sleeve 7 is proportional to the pedal force and is used to drive the electric motor. Torque measurements can be made by strain gauges, angle encoders or other known direct and indirect methods.

[0026] An additional external spur gear toothing is also installed on...

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PUM

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Abstract

The invention relates to a drive unit for an electrically assisted bicycle, wherein the drive unit comprises an electric motor (18) and a housing, in which the electric motor (18) is accommodated, wherein the drive unit furthermore comprises a pedal crank shaft (2) with an output flange (11) mounted thereon. In order to provide a compact unit which does not require any external sensor arrangement or additional gear components whatsoever, the invention makes provision for the drive unit furthermore to comprise a planetary gear unit which is mounted on an axle (19) and has a sun wheel (6), a ring gear (8), a planet carrier (3) and planet wheels (5), wherein the planet carrier (3) of the planetary gear unit (6, 8, 3, 5) is connected in a torque-transmitting manner to the pedal crank shaft (2), and wherein the ring gear (8) of the planetary gear unit (6, 8, 3, 5) can optionally be brought into torque-transmitting connection with the output flange (11) via coupling means (14).

Description

technical field [0001] The invention relates to a drive unit for an electric bicycle, wherein the drive unit has an electric motor and a housing for accommodating the electric motor, and the drive unit also has a pedal crankshaft and an output flange mounted on the crankshaft. Background technique [0002] We already know that electric bicycles need to be equipped with electric motors, and they must be installed on the central axis of the bicycle frame. The electric motor and the associated gear unit are integrated in the center shaft area of ​​the bicycle frame (mid-mounted motor), and a torque-transmitting mechanical connection is established between the electric motor unit and the center shaft or output shaft. [0003] In addition, a gear unit (gear hub or derailleur) is mounted on the rear wheel of such vehicles in order to achieve the optimum torque and speed ratio at different speeds. [0004] The disadvantage of this design is that it will incur additional cost and i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B62M6/55
CPCB62M6/55B62M11/145
Inventor 何玲雷纳·费
Owner 何玲
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