Light-weight speed changing device and bicycle adopting light-weight speed changing device

Abstract

The invention discloses a light-weight speed changing device and a bicycle adopting the light-weight speed changing device. The speed changing device comprises a differential mechanism case, a gear shifting shaft, a gear shifting chain wheel group and a gear shifting rod, wherein the axis of the gear shifting shaft is parallel to the axis of the differential mechanism case, the gear shifting chain wheel group comprises a gear shifting driving chain wheel and a gear shifting driven chain wheel, the gear shifting driving chain wheel is arranged on the gear shifting shaft in a sleeving way, the gear shifting driven chain wheel is arranged and connected on the differential mechanism case in a sleeving way, and is connected with the gear shifting driving chain wheel, and an annular convex block is arranged on the circumferential surface of the gear shifting rod. The annular convex block of the gear shifting rod moves to a connecting part of the gear shifting driving chain wheel and the gear shifting shaft, so that the gear shifting driving chain wheel and the gear shifting shaft are locked, input force is provided for the gear shifting shaft, the gear shifting driving chain wheel rotates along with the rotation of the gear shifting shaft, different bicycle speeds are realized through different transmission ratios of the gear shifting chain wheel group, the structure is light and convenient, the influence on the running speed of the bicycle is smaller, in addition, the occupied space is small, the small size is realized, the riding is easy, on the other hand, the gear shifting rod can be respectively moved in the motionless state and in the operation state of the bicycle for realizing the large-speed-ratio gear shifting, the fast starting is convenient to realize, and more time and more labor are saved.

Description

Technical field [0001] The invention belongs to the technical field of vehicle driving, and specifically relates to a light-weight transmission device and a bicycle thereof. Background technique [0002] Bicycles, automobiles or other vehicles are the means of transportation in people's daily life, and usually have at least one gear shifting device for shift control of the vehicle. [0003] It is known that in the prior art, there are many types of transmission device structures. Automobiles generally use shift gear sets with different transmission ratios to output different speeds to achieve shifting. The structure of the shift gear sets is bulky and will affect the bicycle if it is applied to bicycles. It takes up a lot of space and is not convenient for riding. [0004] At the same time, existing bicycles generally use tower wheel shifts, which can only be shifted during rotation, and can only be shifted one by one, which is complicated in operation. Summary of the invention [0...

AI Technical Summary

Problems solved by technology

[0003] In the known prior art, there are many kinds of transmission device structures, and automobiles generally adopt different transmission ratios of shift gear sets to output different speeds to realize shifting. The structure of the shift gear sets is heavy, and if it is applied to bicycles, it will affect the speed, and it takes up a lot of space, which is not convenient for riding

[0004] At the same time, the existing bicycles generally adopt the tower wheel to shift gears, which can only be shifted during rotation, and can only be shifted one by one, and the operation is complicated.

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