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Bicycle derailleur mechanism and bicycle derailleur

A technology for bicycles and derailleurs, applied in vehicle parts, vehicle gearboxes, chain/belt transmissions, etc., can solve the problems of large space required, four-bar mechanism easily broken, and exposed driving parts, etc. Coordination, reliable transmission mode, and consistent effect

Pending Publication Date: 2019-05-03
ZHUHAI L-TWOO SPORT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Most of the current bicycle derailleur mechanisms use a four-bar mechanism for derailleur shifting, with a single transmission mode and a relatively complex overall structure
Since the four-bar mechanism is mostly a riveted structure, when the external transmission cable drives the four-bar mechanism to move, these riveting points are prone to jamming
However, due to the large number of structural components of the current four-bar mechanism, the space required during the movement is large, causing the four-bar mechanism to only move outwards, so the entire important driving parts are exposed
When this type of derailleur mechanism accidentally crashes the bicycle, the exposed four-bar mechanism is easy to break, resulting in deformation of parts
Since these parts are connected by riveting with adjacent parts, the deformed parts will be stuck at the riveting place with the adjacent parts, making it impossible for the entire four-bar mechanism to perform chain shifting.
Due to the complex structure of this type of derailleur mechanism, it is difficult to replace the internal parts after they are damaged. Users can only replace the entire derailleur, which costs a lot.

Method used

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  • Bicycle derailleur mechanism and bicycle derailleur
  • Bicycle derailleur mechanism and bicycle derailleur
  • Bicycle derailleur mechanism and bicycle derailleur

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0036] see Figure 2 to Figure 4, the bicycle derailleur mechanism provided by this embodiment includes: a base member 1, a sliding member 2 and a derailleur member 3, wherein the base member 1 is provided with a guide portion 11; wherein the guide direction of the guide portion 11 is along the lateral direction set, and there is a direction decomposition amount along the axis direction of the rear wheel 5, which is simply understood as the specific direction of the guiding direction of the guiding part 11 in space, which can be obtained by synthesizing multiple sub-directional vectors, and among these direction vectors There must be a sub-direction vector identical to the direction of the 5 axis centers of the rear wheels. As long as the foreign object moves on the guide part 11, the foreign object can divide the movement into a component direction parallel to the direction of the 5 axis centers of the rear wheels. direction vector. The sliding member 2 is installed on the g...

no. 2 example

[0045] see Figure 6 to Figure 9 , In this embodiment, a bicycle derailleur is provided, including a bicycle derailleur mechanism and a driving member 4 , the driving member 4 is arranged on the base member 1 and can force the sliding member 2 to move on the guide portion 11 . The specific structure of the bicycle and the bicycle derailleur mechanism is the same as that of the above-mentioned first embodiment, so it will not be repeated here, and another embodiment of the driving member 4 will be emphasized here.

[0046] see Figure 7 and Figure 8 , wherein, the driving member 4 includes a driving wheel set 41B rotatably installed on the base member 1, a transmission screw 42B that can drive the sliding member 2 to move on the guide part 11, and a transmission line; the driving wheel set 41B The input end is biasedly connected to the output end of the transmission line, and the transmission line can drive the driving wheel set 41B to rotate; the output end of the driving w...

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PUM

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Abstract

The invention discloses a bicycle derailleur mechanism and a bicycle derailleur. The bicycle derailleur mechanism includes a base body member, a sliding member, a derailleur member on one side of thesliding member, and a driving member, wherein a guide unit is arranged on the base body member; the guiding direction of the guide unit is arranged in the lateral direction, and has a direction disintegration in the axial lead direction of a rear wheel; the sliding member is arranged on the guide unit, and can move in the guiding direction of the guide unit, relative to the base body member; and the driving member can drive the sliding member to move on the guide unit. In the bicycle derailleur mechanism, by means of coordination between the guide unit and the sliding member, the derailleur member is driven to move in the lateral direction so as to drive a flywheel of the previous level or the next level of the chain, thus realizing speed change of the bicycle and continuity of motion, avoiding the clamping stagnation problem of transmission of a traditional four-rod mechanism, and being more reliable in transmission. The bicycle derailleur mechanism and the bicycle derailleur have theadvantages of being simple in structure, being reliable in the transmission mode, and being not easy to encounter clamping stagnation during the movement process.

Description

technical field [0001] The invention relates to the technical field of bicycles, in particular to a bicycle derailleur mechanism and a bicycle derailleur. Background technique [0002] The rear derailleur of the bicycle is assembled on the rear flat fork of the bicycle frame, and is used to cooperate with the combined speed change gear installed on the bicycle. The rear derailleur drives the chain to mesh with the flywheels of different sizes, thereby realizing the bicycle gear shifting. As the bike shifts, pulling the shift cable through the shift adjuster deflects the chain guide on the rear derailleur, which pushes the chain into engagement with a different diameter sprocket. The rear derailleur of bicycles is mainly installed on mountain bikes or road bikes to meet people's sports needs. [0003] Most of the current bicycle derailleur mechanisms adopt a four-bar mechanism for derailleur shifting, with a single transmission mode and a relatively complicated overall stru...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B62M9/124B62M9/126
Inventor 刘春生梁家志汤道军钱后平
Owner ZHUHAI L-TWOO SPORT TECH CO LTD