Transmission wheel diameter setting mechanism for bicycle has segments fitted together between smallest and greatest diameter and adjustable in grooves in disks

摘要

The setting mechanism includes rotatable disks (1, 2) with radial grooves and (3, 4) with spiral grooves, between which the wheel segments (5) held on pins (6, 7) can be displaced radially and positively. During the gear change process, the disks with the spiral grooves can be braked by brakes (12, 13). The disk with the radial grooves is fixed to the shaft..