The invention discloses a telescopic crank device of a bicycle. The crank can be operated and controlled when the bicycle is ridden. The foot treading moment is increased by using the function of thetelescopic crank in case of starting or climbing a hill, a hip bending angle force application form and a knee bending angle force application form which accord with ergonomics are adopted, an elliptical telescopic crank track is provided; the force application area during treading circulation is the longest force arm; when the bicycle enters a treading cycle, a non-force-applying area is the shortest force arm so that fatigue and physical exhaustion of thighs and shanks are further reduced, besides low-speed gear selection of a chain transmission, one more choice is provided for riding, and vast bicycle enthusiasts can face a large amount of physical load during starting or climbing more easily; when high-speed riding is carried out, on the premise that high-speed pedaling frequency is required, stopping-free adjustment can be achieved, the circular motion trail of the shortest crank can be controlled in the riding process, the large-span amplitude burden of thighs and shanks in the high-speed riding process is reduced, and the pedaling frequency rate is increased.
一种脚踏车的伸缩曲柄装置,可实现骑行脚踏车时的曲柄进行操作控制,可于起步或是爬坡路况时,使用伸缩曲柄功能来增加脚部踩踏力矩,并以符合人体运动工学的的屈髋及屈膝角度施力形态,提供一椭圆型的伸缩曲柄轨迹,使踩踏循环时的施力区域为最长力臂,进入踩踏循环时的未施力区域为最短力臂,来进一步的降低大腿及小腿部位的疲劳及体力耗损,使骑行除了链条变速器的低速挡位选用外,给予多一种选择,让广大脚踏车爱好者,可以更轻松的来面对起步或爬坡时的大量体力负荷;当高速骑行时在要求高速踏频的前提下,可免停车调校并在骑行当中来操控成使用最短曲柄的圆周运动轨迹,降低大腿及小腿部位高速骑行时的大跨越幅度负担,并提升踏频速率。
Telescopic crank device of bicycle
一种脚踏车的伸缩曲柄装置
2020-12-01
Patent
Electronic Resource
Chinese
IPC: | B62M RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES , Antrieb von Radfahrzeugen oder Schlitten durch den Fahrer |
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