Gantry crane overhaul coupling point presentation

gantry crane hoisting mechanism and luffing motor shaft and gearbox coupling between the fast axis of the most important quality of the installation. If the two shafts concentricity does not comply, it will cause rapid wear of the tower crane coupling pin, coupling vibration, bearing wear fever, and even cause damage reducer fast axis twist.

Must ensure that the end face of the coupling halves in parallel. 200mm coupling Parallelism shall not exceed 0.1mm, 200mm less than 0.15mm, 400mm shall not exceed 0.2mm. Mutual coupling half face clearance should be maintained at less than 1.5-3mm.

  Oldham coupling  hoist gantry crane  is characterized by: two shaft can compensate for the lack of precision installed at the drawbacks, but can not compensate for skew caused by the connection shaft two disadvantages.

  Lack of precision in the assembly or axial movement of the coupling half when not all claws into concave mouth, jaws face effectively reduced, thereby forming extrusion, increased coupling wear.

  Gantry crane hoisting mechanism coupling jaws squeeze, may cause the entire Oldham Coupling disconnected connection, resulting in heavy damage falling hazard. So, once found the claw by squeezing, must be replaced immediately central Oldham. To ensure the rope drum axis and slow axis reducer reliable connection and can transmit higher power, often using internal gear couplings. The couplings can compensate for assembly precision is not high, and two slightly oblique coupling brought ills. QT4-10, QT4-10 and QT2200 jack-up tower  eot crane  hoisting mechanism are using this coupling. Gear couplings with forged or rolled steel production. Such as tooth wear or other fitting part worn, should be based on the situation, were to be different treatments. Hoisting and luffing mechanism coupling tooth wear, must all be replaced. Running mechanism gear coupling wear, can then be processed first welding repair.