Bicycle with eccentric wheel shaft

Abstract

The bicycle with eccentric wheel shaft includes frame, front wheel and back wheel, hub, driving flywheel assembly on the back wheel shaft, etc. On the hub, there is eccentric shaft with constant eccentric distance. The hub includes hub barrel, ball bearing, locating ring and its cover plate with eccentric shaft installing hole and connecting screw for sync motion. The eccentric shaft is hollow stepped shaft with one hollow end, and one locking unit for the bicycle to change its motion locus is set outside the hollow section and connected via the pulling rope penetrating the hollow end of the eccentric shaft to the shift key on handlebar. When the shift key is pulled, the bicycle can complete speed variation for different road conditions. In addition, the hub has simple structure, easy manufacture and relaxed precision requirement.

Description

technical field [0001] The invention relates to a bicycle with an eccentric wheel shaft, in particular to a bicycle that can be used as a conventional bicycle and can perform ups and downs when riding, and the eccentric state of the wheel shaft can be adjusted as required. Background technique [0002] At present, the wheel axis positions of commercially available bicycles are all fixed, and the front and rear wheels advance horizontally, which is suitable for normal walking, riding, physical exercise and entertainment, and has a single function. Chinese Patent No. ZL99220188.8 discloses "A Bicycle With Adjustable Eccentric Wheel" - a bicycle that can run normally and can make the wheel become an eccentric wheel and then bump up and down during driving. A wheel with an adjustable eccentric shaft is proposed. There is a guide rail slot on the hub of the wheel. A slide block with an axle is installed in the guide rail slot. When the axle in the slide block is fixed at a positi...

AI Technical Summary

Problems solved by technology

Although the structure of the device is simple, it is still inconvenient for the user to put down the bicycle when changing the riding mode, and the adjustment method, especially the adjustment amount, can only be mastered after a long period of exploration

Chinese patent ZL200420028460.7 discloses a "kangaroo axle jumping bicycle", which uses a control handle on the handlebar to pull the traction wire to make the clutch positioner at the axle move, so the wheel axle moves along the center-changing guide under the action of its own gravity. The arc-shaped hole (track) on the slide plate slides, and after sliding from one end of the arc-shaped hole to the other end, it changes from one running track to another; the structure is easy to understand and operate, but the structure is complicated. And only rely on the self-adjustment caused by self-weight to complete the change of the position of the shaft core, the reliability is low, and the material requirements and strength requirements for the shaft and the center-changing guide slide are too high, which will inevitably lead to an impractical and difficult-to-achieve ending

[0003] No. 01257944.0 patent submitted by the inventor on November 8, 2001 and authorized and announced on July 31, 2002 also discloses a bicycle that can be converted from normal riding to undulating riding by simply plugging in and out The wheel axle structure, although the design scheme is easy to change, but it can only be completed after parking and getting off the car, which is unsatisfactory

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