Several problems commonly used in group crane electric hoist

Many people buy electric hoist for group hoist and don’t use it every day, some even don’t use it several times a year. Some users don’t understand maintenance and have not kept it after long-term use. After long-term use, it is found that such a small fault has occurred, which is a common fault. What is it? How to deal with it?

1. The electric hoist has a compact structure, and the electric hoist whose motor axis is perpendicular to the axis of the drum adopts a worm gear transmission device. Its disadvantages are: large length dimension, large width dimension, rough structure, low mechanical efficiency, and difficult processing. The hydraulic system is dual-controlled, and the pressure can be precisely controlled by the overflow regulating valve and the magnetic contact pressure gauge. The electrical control department adopts low-voltage control, which increases the safety of the control system. There may be no action after pressing the start switch. The electric hoist has a compact structure, and the electric hoist whose motor axis is perpendicular to the axis of the drum adopts a worm gear transmission device. Its disadvantages are: large length dimension, large width dimension, rough structure, low mechanical efficiency, and difficult processing. The hydraulic system is dual-controlled, and the pressure can be precisely controlled by the overflow regulating valve and the magnetic contact pressure gauge. The electrical control department adopts low-voltage control, which increases the safety of the control system. Most of the reasons for this failure are due to problems with the power supply lines. Long-term or unused main cables, switches, insurance, etc. may have problems. We can use a pen to test whether there is electricity.

2. After turning on the power, find the motor; buzzing; sound, but the hook does not move. The reason for the analysis is that the brake of the lifting motor cannot be opened due to rust. Since the brake of an electric hoist that is not used for a long time is prone to rust, the brake is not easy to open when used occasionally, which leads to this reason. When this happens, remove the rear brake cover of the lift motor and hit the cone brake of the cone rotor motor with a hammer.

Finally, it may happen that the voltage of the electric hoist is lower than 10% of the rated voltage, and the power of the motor is too small to lift heavy objects. We need to use a multimeter or voltmeter to measure the input voltage of the motor. If the voltage is too low, we need to restore the same voltage.

After purchasing a group crane electric hoist, frequent maintenance is required. If it is not used frequently, a series of problems will occur. In order to work smoothly, we need to maintain it frequently.