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Mechanical continuously variable transmission for bicycles

A continuously variable transmission, bicycle technology, applied in bicycle gear shifting mechanisms, bicycle accessories, vehicle gearboxes, etc., can solve the problems of complex and changeable traffic conditions, and achieve the effect of reducing physical strength and rational use of power.

Inactive Publication Date: 2013-03-06
王云逸
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this kind of speed changer is a stepped speed change device, and the traffic conditions in the city are complex and changeable, and are continuously changing, so the stepped speed change transmission cannot well meet all the traffic conditions within a certain range.

Method used

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  • Mechanical continuously variable transmission for bicycles
  • Mechanical continuously variable transmission for bicycles
  • Mechanical continuously variable transmission for bicycles

Examples

Experimental program
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Embodiment Construction

[0020] As shown in the figure, the base body (11) is fixed on the bicycle, and the transmission ball rack (5) is installed on the base body (11) through the supporting shafts (7) at both ends, and arranged around the center. Transmission ball (4) is installed on the transmission ball frame (5) by transmission ball shaft (6). The central speed-regulating worm (8) is installed in the center of the base body (11) through a bearing. A speed regulating worm gear (9) is fixedly connected on a transmission ball bracket (5), and meshes with the central speed regulating worm (8). The end cover (10) supports the other end of the central speed regulating worm (8) through a bearing, and is fixedly connected to the base body (11). The included angles of the rotation axes of all transmission balls (4) and the rotation axis of the central speed regulating worm are the same. The input shaft (1) passes through the central governor worm (8) and is mounted coaxially with it using bearings. Pu...

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Abstract

Disclosed is a mechanical continuously variable transmission for bicycles. Power is input from an input shaft to drive a driving cone pulley of the transmission to rate at equal speed. A conical surface of the driving cone pulley is in contact with a drive ball by a booster device, and the drive ball is driven to rotate around the axis by friction force. The drive ball drives a driven ball cone pulley to output power. A rotation axis of the driving cone pulley, a rotation axis of the driven cone pulley and a rotation axis of a center speed regulating worm coincide. The driven cone pulley of the transmission has characteristics of a chain wheel, and accordingly serves as a driving chain wheel of a bicycle. Contact points of the driving cone pulley and the driven cone pulley with the drive ball between then are located on the same side of the rotation axis of the drive ball. Rotation of a worm gear which meshes with the center speed regulating worm and fixedly connected with a drive ball holder is controlled by controlling forward rotation and reverse rotation of the center speed regulating rod so that included angle between the rotation axis of the drive ball and the driving cone pulley is changed as well as the included angle between the rotation axis of the drive ball and the driven cone pulley and transmission ratio of the continuously variable transmission is changed.

Description

Technical field [0001] The present invention relates to a mechanical stepless transmission device for bicycles and a method for using the same. Background technique [0002] In China, bicycles, as a convenient means of transportation, have long been known by the public. In addition, for the purpose of saving energy, protecting the environment and alleviating urban car congestion, cycling, a green way of travel, is being vigorously promoted. However, ordinary bicycles do not have a speed change device, and their transmission ratio is fixed, so it is very strenuous to ride under the complex and changeable traffic conditions in the city and different road conditions. This may also be the reason why people in big cities choose cars more. Existing variable speed bicycles usually adopt the mechanical speed change device of multi-sprocket discs, and change the transmission ratio by selecting the diameters of sprockets of different sizes. But this transmission is a stepped transm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B62M11/04B62M25/02
Inventor 王云逸
Owner 王云逸
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