Chain tension adjustment device for bicycle rear derailleur

A tension adjusting device and rear derailleur technology, applied in chain/belt drive, vehicle parts, vehicle gearbox, etc., can solve the problems of chain falling off, potential safety hazard, easy chain falling off, etc., to prevent the chain from falling off, Improve the safety of use and the effect of improving the riding experience

Active Publication Date: 2018-12-28
LANXI WHEEL TOP CYCLE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during actual riding, especially when riding on rough mountain roads, bumps and vibrations cause the chain guide member to rotate counterclockwise, causing the chain to have considerable margin between the front and rear wheels. At this time, The spring completely loses its role in adjusting the tension, and the chain is easy to fall off
However, the existing variable speed bicycles have not yet solved the problem of the chain falling off, which brings inconvenience to riding and even has potential safety hazards

Method used

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  • Chain tension adjustment device for bicycle rear derailleur
  • Chain tension adjustment device for bicycle rear derailleur
  • Chain tension adjustment device for bicycle rear derailleur

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Embodiment 1: as figure 1 As shown, 1 is the bicycle frame, 2 is the bicycle chain, 3 is the rear wheel of the bicycle, 7 is the relevant components of the rear derailleur, and the tension adjustment mechanism 4 of the rear derailleur for the bicycle includes:

[0056] The base 409 is arranged between the derailleur output end of the rear derailleur 7 and the chain guide member 5, and has an inner cavity for accommodating the tension adjustment mechanism 4;

[0057] Tension adjustment mechanism 4 comprises:

[0058] The rotating shaft 408 is rotatably arranged in the base 409, one end is fixed on the chain guide member 5, and the other end is pivotally connected in the base 409;

[0059] The tension transmission assembly 410, one end is limited in the base 409, and the other end acts on the chain guide member 5, and has a function to make the chain guide member 5 swing toward the first swing direction (such as figure 1 As shown, it is the force in the left direction);...

Embodiment 2

[0095] Embodiment 2: The difference from Embodiment 1 is that: the screw 408 is provided with a bead 414, and the inner cavity of the base 409 is provided with a stepped surface 415 for receiving the bead 414, which is used to adjust the screw rod 408. 408 limit. The convex ring on the screw rod is arranged between the step surface and the one-way rotation bearing 407 to limit the displacement of the screw rod 408, that is, to limit the swinging range of the chain guide member. by image 3 In the orientation shown, collar 414 is provided to limit the lowest position of downward movement of the screw. The highest position the screw moves upward is limited by the bottom of the bearing.

[0096] A limiting ring 420 is provided on the outer wall of the rotating body 405 , and a limiting step 417 is provided in the inner cavity of the base, and the depth of the limiting step 417 matches the displacement of the limiting ring 420 . The passive component 403 is sleeved on the rotat...

Embodiment 3

[0098] Embodiment 3: The difference from Embodiment 1 or 2 is that: the outer end of the active component 402 is provided with a dustproof cover 400, and the positioning dustproof cover 400 is covered with the base 409, which is connected by a connecting piece. A dust seal 411 is provided between the base 409 and the chain guide member 5 . Lugs for connection are provided on the outer wall of the dustproof cover 400 , and the connecting piece is connected to the base through the lugs. It not only prevents dust and impurities from entering the chain tension adjustment device, but also facilitates the rider to adjust the gear-type pressure adjustment component through the operation through hole.

[0099] The riding environment of bicycles is complex, especially for mountain bikes, where the environment is full of foreign objects such as sand, branches, sewage, etc. The setting of dust-proof rings and dust-proof covers is conducive to keeping the tension adjustment mechanism clea...

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PUM

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Abstract

The invention relates to a chain tension adjusting device of a rear derailleur for a bicycle. The chain tension adjusting device is characterized by comprising a base, a tension adjusting mechanism, a tension transmission assembly and a radial pressure control assembly, wherein the base is provided with an inner cavity for containing the tension adjusting mechanism; the tension adjusting mechanism comprises a rotary shaft which is rotationally arranged in the base, one end of the tension adjusting mechanism is fixed to a chain guiding component, and the other end of the tension adjusting mechanism is pivoted to the interior of the base; one end of the tension transmission assembly is limited in the base, and the other end of the tension transmission assembly acts on the chain guiding component; the radial pressure control assembly presses the rotary shaft in the radial direction; and the first swing direction and the second swing direction are around the axis of the rotary shaft and are opposite. The chain tension adjusting device has the effects that the chain guiding component swings within a certain range, tension is adjusted to be proper, when the adjusting force on the tension transmission assembly and the tension of a chain are balanced, the chain guiding component is relatively fixed to one position, the situation that the chain guiding component is affected by vibration and accordingly swings in the second swing direction is avoided, the tension of the chain is fixed, and the chain is prevented from being disengaged.

Description

technical field [0001] The invention relates to a chain tension adjustment device for a bicycle, in particular to a chain tension adjustment device for a bicycle rear derailleur. Background technique [0002] With the popularity of bicycles, there are more and more types of bicycles. From the previous single purpose to the current multi-purpose, there are mountain bikes for complex terrain, road bikes for competition, portable folding bikes, and city bikes for leisure. etc. Due to the progress of bicycle production technology, there are more and more speed stages of bicycles, from the initial 7 speeds to the current 11 speeds. Due to the increase of the speed stage, the difference in the number of teeth between the largest sprocket and the smallest sprocket becomes larger and larger, and the length of the corresponding chain is also longer. When riding on complex road conditions, the chain is easy to fall off. is particularly prominent. In order to prevent the chain from ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B62M9/16B62M9/124B62M9/126
CPCB62M9/124B62M9/126B62M9/16
Inventor 袁明
Owner LANXI WHEEL TOP CYCLE IND
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