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Stepless automatic speed transmission of medial axis

An automatic transmission, stepless technology, applied in the direction of bicycle gear transmission mechanism, vehicle gearbox, bicycle accessories, etc., can solve the problems of transmission off-chain, cyclist distraction, accidents, etc. The effect of the chain falling off

Inactive Publication Date: 2008-08-20
郭生文
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. The cyclist must manually shift gears, which will cause the cyclist to be distracted during the ride and cause accidents
[0005] 2. The transmission is easy to cause off-chain during the shifting process
[0006] 3. The center shaft tooth plate is large, because it is neither beautiful nor convenient to use for folding bikes.

Method used

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  • Stepless automatic speed transmission of medial axis

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Embodiment Construction

[0018] best practice

[0019] The best mode for carrying out the present invention will be described below with reference to the drawings.

[0020] A central shaft continuously variable automatic transmission, comprising a central shaft 4, a bottom bracket 3, a left crank 23 and a right crank 22 located at both ends of the central shaft 4, a left end cover 1, a right end cover 9 and a gear plate 10, and a bottom bracket 3 There is a planetary gear set 21 and a brake 20; the planetary gear set 21 includes an internal gear 6, a planetary gear carrier 16, a planetary gear 7 and an external gear 14, the internal gear 6 is installed in the bottom bracket 3, and the planetary gear carrier 16 is fixed in the middle On the shaft 4, the external gear 14 is sleeved on the needle bearing 13 on the central shaft 4, and can rotate relative to the shaft. The planetary gear shaft 15 on the planetary gear bracket 16 is parallel to the central shaft 4, and the axis of the planetary gear shaft ...

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PUM

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Abstract

The invention relates to a center shaft stepless automatic transmission, which adopts the planetary gear train as the main structure, comprising a planetary gear set and a brake arranged in a five-way unit, wherein, the planetary gear set comprising an internal gear, a planetary gear support, a planetary gear and an external gear; the brake is fixed in the five-way unit, which applies an adjustable friction brake force on the internal gear; when the resistance is different due to road condition change, the internal gear enables to generate different rotating speeds along with the adjustable friction brake force, thus the transmission ratio of the total transmission is changed in automatic and stepless mode, thereby, the rider is in appropriate riding state at any time no matter what road condition is. The center shaft stepless automatic transmission breaks the traditional technical mode of center shaft large chainwheel transmission, achieves the large chainwheel effect with small chainwheel, and has the advantages of simple and labor-saving operation, safe and reliable speed change, beautiful appearance and convenient use for foldable bikes.

Description

technical field [0001] The invention relates to a novel transmission device, in particular to a center shaft continuously variable automatic transmission applicable to bicycles. Background technique [0002] Existing bicycles are in order to adapt to different road conditions and environments, and the rider must change his pedaling force from time to time to reach different speeds. The bicycle transmission can enable the rider to change the speed of the bicycle to adapt to different road conditions and environments while maintaining basically the same pedaling force. A more suitable riding state. [0003] Yet above-mentioned traditional bicycle speed changer has following weak point: [0004] 1. The cyclist must manually shift gears, which will cause the cyclist to be distracted and cause accidents during riding. [0005] 2. The transmission is easy to cause off-chain during the shifting process. [0006] 3. The center shaft chainring is large, which is neither beautiful...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B62M9/14B62M25/02
Inventor 郭生文
Owner 郭生文
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