Pedal crank drive for units, such as vehicles, in particular cycles, operated by muscle-power

摘要

In order, in the case of a pedal crank drive operated by muscle-power, to bring the cranks, together with the pedals, into the most advantageous position for the most effective power output by the rider, the hub (2) with the pedal crank spindle (3) is located on a slider (4) which is displaceably arranged in a guide element (5) on the frame (1). The guide element (5) is advantageously located on a holding plate (6) which fixedly connects the tubes (8, 9) and the rear wheel fork (10) of the frame to each other. The guide element (5) and the slider (4), which can be displaced therein, may comprise a dovetail-like or tubular guide. IMAGE