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Motor-gearing unit and wheel hub drive with motor-gearing unit of said type

A technology of wheel hub drive and transmission, which is applied in the direction of gear transmission, wheel transmission, power unit, etc., can solve the problems of large structure space, etc., and achieve the effect of simple cost and simple structure

Inactive Publication Date: 2015-12-09
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a problem with such hub drives in electric bicycles is their relatively large installation space

Method used

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  • Motor-gearing unit and wheel hub drive with motor-gearing unit of said type
  • Motor-gearing unit and wheel hub drive with motor-gearing unit of said type
  • Motor-gearing unit and wheel hub drive with motor-gearing unit of said type

Examples

Experimental program
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Embodiment Construction

[0020] Refer to the following Figures 1 to 3 An electric bicycle 1 having a motor transmission unit 20 according to the invention will be described in detail. as by figure 1 As known, the electric bicycle 1 includes a hub drive 2 connected to a battery 9 . The bicycle can drive a chain 5 through the cranks 7, 8, and the chain can output the rotational torque to the rear wheel through the ratchet 6 on the rear wheel.

[0021] exist figure 2 The hub drive 2 is shown in detail in . The hub drive device 2 includes a hub 10 and a motor transmission unit 20 . The motor transmission unit 20 includes an electric motor 3 and a transmission 4 . The transmission 4 has a first gear stage 46 and a second gear stage 47 .

[0022] The first transmission stage 46 includes a first gear 41 arranged on the input shaft 13 of the transmission 4 and a second gear 42 arranged on the output shaft 14 of the transmission 4 . Furthermore, the first freewheel 31 is arranged on the second gearwhe...

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PUM

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Abstract

The present invention relates to a motor-gearing unit, comprising a motor, preferably an electric motor, with a first and a second drive direction (A, B), comprising a gearing (4) which is arranged directly on the motor and which has an input shaft (13) and an output shaft (14), and comprising a controller (12) which is set up to drive the motor (3) in the first and second drive directions, wherein the gearing (4) has a first gearing stage (46) and a second gearing stage (47) which have different transmission ratios, wherein the first gearing stage (46) has a first freewheel clutch (31) and the second gearing stage (47) has a second freewheel clutch (32), and wherein a freewheeling direction and a locking direction of the first freewheel clutch (31) and of the second freewheel clutch (32) are different.

Description

technical field [0001] The invention relates to a compact motor transmission unit in which the transmission is arranged directly on the motor, for example an electric motor. The following always refers to an electric motor, but the invention is not restricted thereto. Furthermore, the invention relates to a hub drive having such a motor transmission unit and a vehicle, in particular an electric bicycle, having such a hub drive. Background technique [0002] Compact motor transmission units, which are also referred to as transmission motors, are known from the prior art. In this case, a transmission arranged directly on the electric motor reduces the output rotational speed in order to increase, in particular, the output rotational torque of the electric motor. Furthermore, hub drives are known, for example in connection with electric bicycles, which are mounted in the hub. However, a problem with such hub drives in electric bicycles is their relatively large installation ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60K7/00B60K17/04B60K17/26B62M6/60F16H3/00
CPCB60K7/0007B60K17/043B60K17/26B60K2007/0061B60Y2200/13B62M6/60B62M11/06F16H3/003B60K17/06B60K17/145B62M11/04
Inventor R·恩格尔贝格
Owner ROBERT BOSCH GMBH