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Bicycle hub transmission device with sun gear guide

A transmission device and wheel hub technology, applied in the field of bicycle transmission device, can solve problems such as reducing battery life

Inactive Publication Date: 2004-05-12
SHIMANO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This usually requires a larger electric motor that consumes a lot of energy, thus significantly reducing the life of the battery

Method used

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  • Bicycle hub transmission device with sun gear guide
  • Bicycle hub transmission device with sun gear guide
  • Bicycle hub transmission device with sun gear guide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0040] figure 1 Is a side view of the rear of a bicycle 10 including a specific embodiment of a hub transmission 14 incorporating many of the features of the present invention. The rear portion of the bicycle 10 includes a frame 18 with a seat tube 22 for supporting a saddle 24, a pair of conventional chainstays 26, and a pair of conventional seatstays 30. At the junction of the chain stay 26 and the seat stay 30, the wheel 34 is rotatably supported by the frame end 35 about the axle 36 of the hub transmission 14, and, at the junction of the seat tube 22 and the chain stay 26, A crank assembly 38 having pedals 42 and chain 46 is rotatably supported. The chain 50 meshes with the chain ring 46 and encircles a sprocket 54 which rotatably drives the hub transmission 14 . The Bowden control cable 62 is used to change the gear ratio of the hub transmission 14 in a manner described in more detail below.

[0041] figure 2 is a cross-sectional view of a specific embodiment of the ...

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PUM

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Abstract

A sun gear apparatus includes an axle, a sun gear rotatably supported around the axle, and a sun gear guide ring disposed between an inner peripheral surface of the sun gear and the axle. The sun gear guide ring minimizes or eliminates looseness in the coupling between the sun gear and the axle.

Description

technical field [0001] The invention relates to a bicycle transmission device, in particular to a multi-speed wheel hub transmission device installed inside the bicycle. Background technique [0002] Internally mounted multi-speed hub drives are sometimes mounted on the rear wheel of the bicycle so that the rider can select different gear ratios to vary the pedaling effort. A typical hub transmission includes a hub axle mounted to a bicycle frame, a driver rotatably supported to the hub axle to receive pedaling force via a sprocket and a chain, and a hub shell rotatably supported to the hub axle. A power transfer mechanism is disposed between the driver and the hub shell to transfer rotational power from the driver to the hub shell via several power transfer paths, each power transfer path typically producing a unique gear ratio. The power transmission mechanism typically includes a planetary gear mechanism that includes one or more sun gears rotatably supported about a hub...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B62M9/12B62M11/16F16D41/06F16D41/12F16H3/44F16H3/62
CPCB62M11/16Y10T74/19921Y10T74/19893
Inventor 正下昭彦
Owner SHIMANO INC