Reasons for slipping hook of electric wire rope hoist

Because of its compact structure, superior performance, small headroom size, accurate positioning, comfortable operation, safe and reliable, wire rope electric hoist is widely used in construction machinery, aerospace, wind power, nuclear energy, automobile manufacturing, metal processing, papermaking and other fields . reliability. There are five main reasons for the sliding hook phenomenon of Wire Rope Hoists.

One of the reasons is the failure of the electric hoist motor. When the Remote Control keeps pressing the lift button, the cone brake is in the open state. If the motor fails or the power is insufficient, it may cause the load of the hook to drop.

The second reason is the failure of the cone brake of the wire rope electric hoist. If the electric hoist is in the normal lifting state, the electric hoist may not be able to slide down when the electric hoist is closed or the brake is in the normal lifting state, which may also cause the electric hoist to malfunction during driving.

The third reason: the wire rope hoist reducer has failed, and the electric hoist is all installed on the side of the reducer gear transmission to reduce the speed and increase the torque. The output speed and torque of the motor match the input speed and torque of the drum. The electric hoist reducer includes an input shaft, an intermediate shaft, an output shaft and gears that mesh with each other on each shaft. Any twisting and breaking of the drive shaft, broken gear teeth and poor meshing stability will affect the torque transmission and cause the hook to slip.
The fourth reason: there is a problem with the torque transmission of the finger reducer of the wire rope hoist motor. The electric motor and reducer of the wire rope hoist are respectively located on both sides of the hoist, and the torque transmission between them is completed by the coupling in the drive shaft and the drum. The drive shaft and coupling transfer torque through splines. Drive shaft fracture, spline wear, coupling damage, etc. will affect the transmission torque and cause the hook to load and slip.

The fifth reason: In each link of the torque transmission of the wire rope hoist, the damage of each bearing will also affect the torque transmission. The damage of the bearing will cause the parts of the transmission mechanism to bear the eccentric load torque. The gearbox bearing bears the unbalanced load torque, and it is easy to shake and twist at the beginning; the gear mesh is unstable, and even breaks the tooth; the spline wears. All of these affect torque transmission and cause the load-bearing hook to slip.