The invention relates to the technical field of bicycles, and discloses a quick-release crank which is mounted at a five-way pipe of a frame and comprises a connecting shaft, a gear and crank arms mounted at two ends of the connecting shaft, the connecting shaft is rotatably connected into the five-way pipe, the gear is fixedly mounted on the connecting shaft, and the crank arms are mounted at two ends of the connecting shaft. The crank arm comprises a fixing end used for being connected with the connecting shaft and a connecting end used for installing the pedal, a fixing hole used for enabling the crank arm to be arranged at the end of the connecting shaft in a sleeving mode is formed in the fixing end, a gap groove penetrating through the fixing end is formed in the side, away from the connecting end, of the fixing hole, and the gap groove divides the fixing end into an upper locking block and a lower locking block. The upper locking block is provided with a locking assembly used for adjusting the size of the gap groove. The problems that in the prior art, a special tool is needed for fixing the first crank and the gear, the installation speed is low, and meanwhile the situation that the crank is loosened outdoors is not beneficial to maintenance; and disassembly and assembly are inconvenient.
本发明涉及自行车技术领域,公开了一种快拆曲柄,曲柄安装于车架的五通管处,包括连接轴、齿轮和安装于连接轴两端的曲柄臂,连接轴转动连接于五通管内,齿轮固定安装于连接轴上,曲柄臂包括用于连接连接轴的固定端和用于安装踏板的连接端,固定端上开设有用于将曲柄臂套设在连接轴端部的固定孔,固定孔远离连接端的一侧开设有贯穿固定端的间隙槽,间隙槽将固定端分为上锁紧块和下锁紧块,上锁紧块上设置有用调节间隙槽尺寸的锁紧组件。本发明用于解决现有技术需要专用工具,才能将第一曲柄与齿轮固定,安装速度较慢,同时在野外发生曲柄松动的情况,不利于维护;拆装不便的问题。
Quick-release crank
一种快拆曲柄
2022-09-06
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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