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One-way force transmission system

A transmission device and one-way force technology, applied in one-way clutches, transportation and packaging, bicycle control systems, etc., can solve the problems of increasing manufacturing and assembly costs, increasing the weight and cost of shifting units, etc.

Inactive Publication Date: 2005-08-31
SRAM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The above parts must be precisely matched and assembled, so the manufacturing and assembly costs are greatly increased, and a corresponding installation space is required in the shifter housing
In addition, due to the long service life of these parts, the structure should be firm, which also increases the weight and cost of the shift unit

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0041] figure 1 Show a spring structure on the shift lever 1, which belongs to the bicycle shifter in the prior art. One end of a back-moving spring 2 is hinged on the shift lever 1, and the other end pushes against the housing not shown in the figure under the loaded state. The return spring 2 brings the selector lever 1 back to the initial position after the end of the shifting process. The shape of the one-way transmission member 3 is a positioning pawl, which swings around the shaft 4, and the shaft 4 is connected with the shift lever 1 . The pretension spring 5 is arranged around the shaft 4 and its one end bears on the shift lever 1, and its other end pushes the positioning pawl 3 on the tooth profile 6, which is located on a rotating member or drum not shown.

[0042] As shown in FIG. 2 , the preload spring 5 for pressing the one-way transmission member 3 is eliminated. The pre-tightening function is undertaken by the return spring 2, one end of which is supported on...

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PUM

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Abstract

The present invention relates to a one-way force transmission with restore-function for utilization in ratchet mechanism, e.g. in crank-switch, rotation-crank-switch, trigger-switch to operate the gear-shift of a bicycle, or in ratchet for tools, jacks and everywhere where a one-way transmission is asked with a restoring of the operation-element. The present invention reduces the number of the necessary switch-components by means of a multi-function without damaging the whole function. For example, the restore-spring for the operation-crank also takes over the tension of the one-way transmission element. The following switch-components are integrated together. The advantage of the present invention is that through skillful combination of many functions the number of the necessary components can be reduced and thus the cost, construction space and weight can also be saved. In addition, the elasticity and flexibility of the plastic material can be used for a spring purpose.

Description

technical field [0001] The invention relates to a one-way force transmission device with positioning lock. The one-way force transmission device is used in ratchet mechanisms, such as lever shifters, knob shifters, trigger shifters, to operate bicycle shifters, or ratchet mechanisms for tools, car jacks and Other occasions where one-way force transmission devices and operating parts need to return to their original positions. Background technique [0002] Ratchet mechanisms, such as those used to operate shifters for bicycle gearshifts, are disclosed in patent documents EP0371429A2, EP0647557B1, FR2701917 and GB2012893A. [0003] The above shifters all include a shift lever for tensioning or winding the shift cable and a release lever or release button for releasing the positioning device. The gear shift lever rotates a one-way transmission member pre-tightened in the meshing direction, that is, drives the reel to rotate. When rotating, the reset elastic force acting on th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B62K23/06B62M25/04
CPCY10T74/20438Y10T74/20037B62M25/04B62K23/06Y10T74/20684
Inventor M·阿瑟尔
Owner SRAM
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