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QZ Model Hydraulic Grab Bucket Double Girder Overhead Bridge Crane
Description:
1. Main beam - The main traveling structure of the crane which
spans the width of the bay and travels in a direction parallel to
the runway. The bridge consists of two end trucks and one or two
bridge girders depending on the equipment type. The bridge also
supports the trolley and hoisting mechanism for up and down lifting
of load.
2. End trucks - Located on either side of the bridge, the end
trucks house the wheels on which the entire crane travels. It is an
assembly consisting of structural members, wheels, bearings, axles,
etc., which supports the bridge girder(s) or the trolley cross
member(s).
3. Bridge Girder(s) - The principal horizontal beam of the crane
bridge which supports the trolley and is supported by the end
trucks.
4. Runway - The rails, beams, brackets and framework on which the
crane operates.
5. Runway Rail - The rail supported by the runway beams on which
the crane travels.
6. Hoist - The hoist mechanism is a unit consisting of a motor
drive, coupling, brakes, gearing, drum, ropes, and load block
designed to raise, hold and lower the maximum rated load. Hoist
mechanism is mounted to the trolley.
7. Trolley - The unit carrying the hoisting mechanism which travels
on the bridge rails in a direction at right angles to the crane
runway. Trolley frame is the basic structure of the trolley on
which are mounted the hoisting and traversing mechanisms.
8. Bumper (Buffer) - An energy absorbing device for reducing impact
when a moving crane or trolley reaches the end of its permitted
travel, or when two moving cranes or trolleys come into contact.
This device may be attached to the bridge, trolley or runway stop.
Different spreaders: