Lifting trolley is main lifting mechanism of 50t-30m-9m double girder gantry crane, below are brief introduction on its structure:

a. Trolley moving mechanism

Wheel number: 2 pairs/ 4         wheel diameter: 300mm        trolley number: 1

Centre distance of trolley: 2500mm (same with centre distance of main girder)

Wheel base: 1500mm

Rail at each side: monorail               drive mode: motor drive

Safety device: anemobiagraph, limit stopper, over-travel limit switch and bumper block

b. Lifting mechanism

Structure, type and constitute：travelling wheel box, frame and winch

Winch type: JMY5T

Pulley rate: 10                max KN: 6t

steel wire rope model: ∮21.5（6 x 37）-1770

c. Steel wire rope for lifting

Model:  ∮21.5（6 x 37）-1770

Origin: China