Pedal crank drive for muscle power-operated vehicle i.e. bicycle, has guide rail detachably arranged in outer crankcase halves, and chain wheels arranged on bearing bushing, where bushing is mounted on inner crankcase half

摘要

The drive has a support plate (1) fixedly connected to a lower bicycle frame, where the support plate contains lateral recesses for radial shaft seals (2). A U-shaped guide rail (17) is detachably arranged in outer crankcase halves (6) and is in functional connection with a guide roller (14) of an associated rocker crank arm (13). Chain wheels (19) are arranged on a bearing bushing (18), where the bushing is mounted on an inner crankcase half (5). A pair of bellows is fixed in a groove (24) and a groove plate (16) of the rocker crank arm at a front end of the outer and inner crankcase halves.