The invention provides an exercise bicycle and a bicycle frame which can easily assemble and disassemble a chain and a pedal unit even in an exercise bicycle with a rear upper fork. The exercise bicycle comprises a bicycle frame, wherein a receiving part (110) connected with a pedal unit is arranged at the lower part of a vertical pipe (120); a pedal unit detachably connected to the receiving part; and a chain erected between the pedal unit and the rear wheel, the pedal unit is detachable, the pedal unit rotatably holds a pedal crank on which the sprocket is axially supported, the pedal unit has a connecting portion (230) for connecting to the receiving portion, and the chain is connected to the rear sprocket through a rear sprocket tooth erected on the sprocket and provided on the rear wheel. The bicycle frame is provided with a rear upper fork (150) which is connected with one side of the chain wheel, and the rear upper fork is provided with a dismounting part (551) which can be dismounted from the rear upper fork.
本发明提供即使在存在后上叉的练习用自行车中,也能够容易地进行链条和脚踏板单元的装卸的练习用自行车和自行车车架。练习用自行车包括:自行车车架,其连接脚踏板单元的承接部(110)设于立管(120)的下部;脚踏板单元,其能够装卸地连接于承接部;以及链条,其架设于脚踏板单元与后轮之间,脚踏板单元能够装卸,脚踏板单元将轴支承有链轮的脚踏板曲柄旋转自如地保持,并且具有用于与承接部连接的连接部(230),而且,链条为通过架设于链轮与设置于后轮的后链轮齿,从而将脚踏板单元和链条装卸自如地连接于自行车车架的结构,自行车车架具备连接链轮的一侧的后上叉(150),后上叉具有能够自后上叉拆除的拆除部(551)。
Practice bicycle and bicycle frame
练习用自行车和自行车车架
2024-03-12
Patent
Electronic Resource
Chinese