How to thread the wire rope on the crane boom

1. Untie one end of the old wire rope of the crane, and then tie the ends of the old and new wire ropes with diameter iron wire.

2. Start the lifting mechanism, use the old rope to drive the new rope, and stop when the joint of the old and new ropes is rolled up to the drum.

3. At this time, loosen the joints of the old and new ropes, and temporarily fix the new ropes to a suitable place on the trolley. Then lower all the old ropes to the ground.

4. Then fix both ends of the new wire rope on the drum with pressure plates. The crane starts the lifting mechanism and winds the new wire rope.

Extended information:

There is a rotating drum underneath the boom, with a wire rope wound around it. The wire rope passes through the pulley on the top of the next boom section, lifting the previous section. The heavy arm pulls out, and so on.

When retracting, the drum is reversed to recover the wire rope, and the lifting arm retracts under its own weight. This rotating drum is driven by a hydraulic motor, so you can see two oil pipes, but do not mistake them for oil cylinders.

In addition, there are some truck cranes with set-type plunger cylinders installed in the telescopic arms, but this application is extremely rare.

Because multi-stage plunger cylinders are expensive, and the boom will elastically bend when loaded, which has a great impact on the life of the cylinder.

The electrical system of the truck crane chassis is used to undertake the starting, lighting and signaling of the car.

System electrical appliances adopt single-wire connection method. The rated voltage is 24 volts DC, with the negative pole grounded. The electrical system is composed of two parts: power supply and electrical equipment.

The power supply consists of batteries, DC generators and regulators, and electrical equipment includes starters, lighting devices and signaling devices.

Baidu Encyclopedia - Auto Crane