Overhead bridge cranes are generally composed of lifting trolleys, operating mechanisms, and metal bridge beam structures. The lifting trolley is composed of lifting mechanism, trolley running mechanism, and trolley frame.
Lifting mechanisms include electric motors, brakes, reducers, reels and pulley blocks. The motor drives the reel through the reducer to rotate the rope around the reel to make the rope up and down to lift or unload the goods.
Trolley frame is a steel frame to hold and install components, such as a lifting mechanism and trolley running mechanism, is usually a steel welded structure.
Single girder overhead crane
Double girder overhead crane
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