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Bicycle main axis eccentric accelerating device

A speed-increasing device and bicycle technology, which is applied to vehicle gearboxes, chain/belt transmissions, vehicle components, etc., can solve problems such as clothes being caught, hidden dangers of riding a bicycle, and high cross height, etc., to achieve reduced cross height and wide application , Improve the effect of riding speed

Inactive Publication Date: 2005-03-16
GIANT BICYCLES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Existing bicycle transmission ratio is all determined by the number of teeth of large toothed disc and flywheel, and this just has two problems: the one, when being applied on the bicycle of small wheel diameter, in order to reach reasonable transmission ratio, large toothed disc (sprocket wheel ) is relatively large compared to the frame, and the span height is relatively large. It is inconvenient for people to get on and off the bicycle, and at the same time, clothes may be caught during riding, which poses a safety hazard to cycling; secondly, the large chainring ( sprocket) is a discordant part of the vehicle

Method used

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  • Bicycle main axis eccentric accelerating device
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Embodiment Construction

[0021] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0022] Such as figure 1 , 2 shown.

[0023] An eccentric speed-increasing device for a bicycle main shaft, installed in the bottom bracket of a bicycle, comprising a main shaft 1, a box body 11, and an end cover 15, the end cover 15 is connected with one end of the box body 11, and the other end of the box body 11 is provided with a lock The external thread 10 connected to the inner thread of the circle, the box body 11 is connected with the big five through the end cover 15, and is connected through the lock ring 9 (such as figure 1 shown) lock and secure. The main shaft 1 passes through the box body 11 and the end cover 15, and its two ends extend out of the big bottom bracket and are respectively equipped with left and right cranks. The axis L of the main shaft 1 is offset from the axis L' of the box body 11. One side and parallel with the axis l...

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Abstract

This invention has disclosed one kind of device that cannot only guarantees the speed and also reduces centrifugal acceleration of the diameter of large gear dish and the main shaft of a bicycle which is installed in the Big Five Through of a bicycle. The device includes the main shaft, case body, and end cover, the end cover links with one end of the case body while another end of the case body has an external thread links to the lock internal thread. The main shaft goes through the case body and the end cover, and its two ends stretch out of the Big Five Through and is respectively fixed with left and right cranks. Its characteristic is that the axis line of the main shaft is setovered one side of the case body axis line; the shaft is fixed a big initial gear and an output gear sheath, the big initial gear rotates together with the main shaft, the output gear sheath winds the main shaft and revolves it. On the end of the case body there is a transmission gear, on the end out of the end cover there is the external thread linking with the sprocket. The big initial gear lies in the case body and meshes the secondary pinion that is installed in the case body, while the coaxial big secondary gear with the secondary pinion meshes the transmission gear on the output gear sheath.

Description

technical field [0001] The invention relates to a bicycle part, in particular to a speed-increasing device installed in the bottom bracket of a bicycle, in particular to an eccentric speed-up device for a bicycle main shaft. Background technique [0002] Existing bicycle transmission ratio is all determined by the number of teeth of large toothed disc and flywheel, and this just has two problems: the one, when being applied on the bicycle of small wheel diameter, in order to reach reasonable transmission ratio, large toothed disc (sprocket wheel ) is relatively large compared to the frame, and the span height is relatively large. It is inconvenient for people to get on and off the bicycle, and at the same time, clothes may be caught during riding, which poses a safety hazard to cycling; secondly, the large chainring ( Sprocket) is an unharmonious part of the vehicle. Contents of the invention [0003] The object of the present invention is to provide a bicycle main shaft ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B62M9/02
Inventor 金健
Owner GIANT BICYCLES
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