The lifting machinery used in the construction of the bridge is generally separable according to its construction and performance.
It is a light and small lifting equipment, a bridge type crane and a boom type crane, and a cable crane. Light and small lifting equipment such as: jack, pneumatic hoist, electric hoist, balance hoist (also known as balance hoist), winch and so on. Bridge type cranes such as beam cranes. Boom type cranes such as fixed slewing cranes, tower cranes, truck cranes, tire cranes, crawler cranes, etc. Cable cranes such as elevators.
According to the nature of lifting: mobile cranes, tower cranes, mast cranes.
According to the driving method: one type is centralized driving, that is, one motor drives the long drive shaft to drive the active wheels on both sides; the other type is driven separately, that is, the active wheels on both sides are driven by one motor. Medium and small bridge cranes use a combination of brakes, reducers and electric motors in a "three-in-one" drive mode. For ordinary bridge cranes with large lifting weights, the drive unit often uses universal joints. .
According to the structure, the crane is mainly divided into light and small lifting equipment, bridge type (bridge type, gantry crane), boom type (self-propelled, tower type, door seat type, railway type, floating type, mast type crane). Cable type.
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