Hydraulic gear change device for bicycles

摘要

The device has a switch lever on the switching station of the bike, and is a hydraulically powered system that does not operate by rope-pulling systems. The gap of the pinion gear on the back wheel conforms to the gap on the step layer of the gears. The device has a hydraulic master cylinder (1) fastened to the gear change lever. The power of the cylinder is transmitted via a pressure conduit (2) to a cylinder (3) fastened to the changer unit. The pressure is balanced during power transmission. The gear change distance is adjusted at the changer lever to the length required by the changer unit. All parts, with adaptors if necessary, can be fitted to existing bicycles.