Girder gantry crane trolley design

overhead gantry crane trolley beam design:

①, outrigger connection Zama determine the size: the leg plane, the horizontal angle of the legs is generally 70-75 degrees. The horizontal distance calculation, set: B1. The distance between the top leg to B2. The outrigger connection Zama size (set B3):
               
②, walking round carts between dimensions (wheelbase) to determine: ⑴, press leg extension cord diagonally arranged. ⑵, determine carts travel drive dimensions. ⑶, angular dimensions to determine the axle seat. ⑷, the conclusion that the dimensions between the running wheel carts (wheelbase).

③, trolley beam central structure: generally battened lattice dual channel. 5 tons gantry crane is generally :18-22 channel.
10 tons   hoist gantry crane   is generally :25-40 channel. 15 tons gantry crane is generally: welded box.

④, calculate: ⑴, according to Charpy with cantilevers to determine its strength. ⑵, deflection calculations: Permissible values   are: (1/400) * B4. (B4-wheelbase)

⑤, structure taking the thinnest thickness: 10 mm.

⑥, gear box bearing plate to take the thinnest thickness: 16 mm. To satisfy the stiffness requirements.

⑦, outrigger plate flange thickness generally taken: 20 mm.

⑧, outrigger plate flange bolts M20. Flange diameter: 22.