The invention relates to the field of bicycle accessories, and specifically relates to a length-adjustable bicycle crank mechanism. The length-adjustable bicycle crank mechanism is characterized in that the length-adjustable bicycle crank mechanism comprises an adjusting block, a crank and a base plate, the adjusting block is provided with a hole used for being connected with a pedal, an accommodating hole for accommodating the adjusting block is formed in the crank, the first end area of the adjusting block is greater than the second end area of the adjusting block, the outer peripheral surface of the adjusting block is matched with the inner wall surface of the accommodating hole, the area of the base plate is larger than the area of the second end of the adjusting block, a certain offset is formed between the axis of the hole and the center of the adjusting block, at least two limiting parts are arranged on the outer peripheral surface of the adjusting block, and a positioning partmatched with the limiting part is arranged on the inner wall face of the containing hole. When the adjusting block and the containing hole rotate relatively, the different limiting parts are matched with the positioning part, adjustment of the lengths of various crank force arms can be achieved, the individual requirements of users are met, the conversion rate of force application of the users isadjusted, riding is more labor-saving, comfortable, and the adjustment is convenient.
本发明涉及脚踏车配件领域,具体涉及一种长度可调脚踏车曲柄机构,其特征在于,包括:调整块、曲柄、和垫板,调整块上开设有用于与脚踏相连接的孔,曲柄上开设有用于容置调整块的容置孔,调整块的第一端面积大于调整块第二端的面积,调整块的外周面与容置孔的内壁面相配适,垫板面积大于调整块第二端的面积,所述孔的轴线距离调整块的中心具有一定的偏移尺寸,调整块外周面设有至少两个限位部,容置孔的内壁面设有一个与限位部相配合的定位部,调整块与容置孔相对转动时,使不同的限位部与定位部相配合,可以实现多种曲柄力臂长度的调节,满足使用者的个性化需求,调整使用者施力的转化率,使骑行更加省力、舒适,调节方便。
Length-adjustable bicycle crank mechanism
一种长度可调脚踏车曲柄机构
2020-06-12
Patent
Electronic Resource
Chinese
IPC: | B62M RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES , Antrieb von Radfahrzeugen oder Schlitten durch den Fahrer |