TROLLEY-BUS AUTOMATIC POLE RETRIEVER Russian patent published in 2003 - IPC

FIELD: city electric transport. SUBSTANCE: invention is designed for automatically retrieving of trolley-bus poles in case of dewirement of their of their trolleys. Proposed device contains assembly housing consisting of holder, base and cover. Shaft installed in housing is provided with detachable handle, guide rigidly fitted by its bushing on shaft, drum with flanges for winding on pole wire rope rigidly fitted by its flange bushing on shaft, main latch, spring-loaded disconnect latch hinge-connected with main latch, main spring, auxiliary spring and end face cover of auxiliary spring secured on housing cover. Drum is furnished additionally with brake mechanism which is provided with bent bell-crank secured inside drum and arranged in radial clearance between drum and main spring. One arm of bell-crank is located along drum and main spring. Other arm is hinge-coupled with spring-loaded pusher. Free end of pusher, being passed through hole made in flange of drum flange bushing, is in contact with friction brake shoe engaging with end face cover of auxiliary spring. EFFECT: improved reliability and safety. 2 cl, 6 dwg