BRIDGE CRANE TROLLEY Russian patent published in 2004 - IPC

FIELD: mechanical engineering; materials handling facilities; cranes. SUBSTANCE: invention relates to bridge crane trolleys, load lifting capacity up to 20 t, incl. proposed trolley contains frame made of longitudinal and cross beams resting on running wheels, load-gripping mechanism, load-lifting mechanism and geared motor mechanically coupling with running wheel shafts. Running wheels are mounted on shafts in pairs. Cross beams are made of closed hollow sections accommodating running wheel shafts. Bearing units are made in form of axle-boxes installed in end faces of cross beams intercoupled in center by one longitudinal beam. Electric hoist is used as load-lifting mechanism. In some cases cross beams can be made of closed hollow sections. Cross beams can be made also of closed hollow rectangular sections. Rolled tube should be preferably used as closed hollow section. In some cases longitudinal beams can be made of open or of sections. In some cases suspended electric hoist can be used as load-lifting mechanism, or support electric hoist can be used for this purpose. Load trolley should be preferably provided with frame flooring and frame guards. EFFECT: reduced metal usage, simplified design of bridge crane trolley, unification of process of manufacture, enlarged range of trolleys in production. 10 cl, 7 dwg