Crank component for bicycle i.e. children's bicycle, has spider rotational torque-locking connecting chain ring with crank arm, where spider and crank arm are two-piece formed, material-fit joined with each other and pressed together

摘要

The component has a crank arm (3), a chain ring (5) and a spider (4), where the spider rotational torque-locking connects the chain ring with the crank arm. The spider and the crank arm are two-piece formed, material-fit joined with each other and pressed together, where the spider includes an inner gear, and teeth of the gear are pressed in the crank arm. A distance between an axis of the spider and a pedal axis determined at the crank arm is measured about 160 mm. The chain ring and the spider are detachably connected with the each other by screws, where the spider includes a set of holes.