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Rear derailleur

A technology of rear derailleur and base, which is applied in chain/belt transmission, vehicle gearbox, transportation and packaging, etc. It can solve the problems of easy swing of the derailleur swing arm, easy detachment of the chain, and jamming of the guide wheel. Achieve the effects of slowing down the swing frequency and amplitude, solving the danger of chain off, and simple structure

Pending Publication Date: 2020-03-17
珠海蓝图运动科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, when the bicycle is running on an uneven road, the swing arm of the chain is easy to swing. When the swing of the swing arm of the chain is large, the chain is easy to break away from the guide wheel and the chain phenomenon occurs, resulting in a dangerous situation.

Method used

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  • Rear derailleur
  • Rear derailleur
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] together with reference Figure 1 to Figure 9 , is a preferred embodiment, a rear derailleur with a one-way damping mechanism, installed at the rear of the bicycle, used to realize the tensioning and shifting process of the chain, including the derailleur assembly and the hinged derailleur The tensioning chain assembly on the chain assembly, the shifting chain assembly is connected to the shift line and toggles the chain tensioning assembly, and the chain tensioning assembly is used to install the chain and toggle the chain on different sprockets.

[0049]The tensioning chain assembly includes a base 11 and a swing arm 12, the swing arm 12 is rotatably connected to the base 11, the base 11 is hinged on the shifting chain assembly, and the rotation connection between the base 11 and the swing arm 12 is provided with a guide wheel 3, The guide wheel 3 is rotatably connected to the base 11, the swing arm 12 is provided with a tension pulley 4, the tension pulley 4 is insta...

Embodiment 2

[0062] together with reference Figure 10 to Figure 13 , is another preferred embodiment of the present invention. In this embodiment, the one-way damping mechanism is also composed of a one-way bearing 16, a damping sleeve 15 and an elastic hoop 17. The elastic hoop 17 is set by four mutually close The elastic steel ring 172 on the damping sleeve 15 is formed. The damping sleeve 15 is provided with a limiting protrusion 156 for limiting the elastic steel ring 172. The front end of the rotating shaft 14 is fixedly connected to the limiting plate 26 by screws, and the limiting plate 26 is connected to the base. The internal structure of the seat 11 cooperates to limit the lateral position of the damping sleeve 15 and the one-way bearing 16 , so that the damping sleeve 15 and the one-way bearing 16 are installed on the rotating shaft 14 .

[0063] The elastic steel ring 172 is provided with a fracture opening 173, and the elastic steel ring 172 is made of steel, has a certain re...

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Abstract

The invention relates to the technical field of bicycles and discloses a rear derailleur which comprises a derailleur assembly and a chain tensioning assembly hinged to the derailleur assembly. The chain tensioning assembly comprises a base and a swing arm hinged to the base. A one-way damping mechanism and a reset torsional spring are arranged between the swing arm and the base, the one-way damping mechanism comprises a one-way bearing, a damping sleeve and an elastic hoop, the damping sleeve is fixed to the base, the one-way bearing is arranged in the damping sleeve, and the elastic hoop isarranged on the damping sleeve in a sleeving mode and enables the damping sleeve to be pressed on the one-way bearing. The invention designs a rear derailleur with a one-way damping function. When theswing arm rotates in one direction, no damping force exists, when the swing arm rotates in the other direction, the damping effect is achieved, it is guaranteed that enough tensioning force is provided for the tensioning wheel, meanwhile, rotation of the swing arm in the chain disengaging direction is limited, and the problem that a chain is prone to falling off when a vehicle runs on a bumpy road surface is solved.

Description

technical field [0001] The invention relates to the technical field of bicycles, in particular to a rear derailleur. Background technique [0002] The rear derailleur is a clutch shifting structure arranged at the rear of the bicycle and used for shifting gears. The existing rear derailleur utilizes a rotatable derailleur swing arm to drive the chain on the guide wheel away from the original sprocket, and the chain is switched and meshed on different sprockets through the guide wheel to toggle the chain to realize the clutch shift process. [0003] But when the bicycle is running on an uneven road surface, the swing arm of the chain is easy to swing. When the swing of the swing arm of the chain is large, the chain is easy to break away from the guide wheel and the chain phenomenon occurs, causing a dangerous situation to occur. Contents of the invention [0004] In order to solve one of the above-mentioned technical problems, the present invention provides a rear deraille...

Claims

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Application Information

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IPC IPC(8): B62M9/1244B62M9/124B62M9/16
CPCB62M9/124B62M9/1244B62M9/16B62M2009/007
Inventor 刘春生郭建斌汤道军
Owner 珠海蓝图运动科技股份有限公司
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