The causes and maintenance methods of mechanical failures in electric hoists can be summarized as follows:

1、 Cause of malfunction

Motor issues

Overload: The electric hoist is overloaded and exceeds its designed load capacity, resulting in overheating and damage to the motor.

Voltage instability: The power supply voltage of the electric hoist is too high or too low, not within the rated range, which affects the normal operation of the motor.

Phase loss operation: The electrical equipment in the main control circuit of the electric hoist is damaged, the circuit is disconnected or the contact is poor, resulting in phase loss operation of the motor.

Transmission system issues

Transmission damage: The transmission of the electric hoist is damaged, affecting the lifting and lowering speed of the hoist.

Wear or lack of lubrication of transmission components: The transmission components are not well lubricated or assembled improperly, resulting in unstable operation or abnormal noise of the electric hoist.

Electrical system issues

Start switch malfunction: The start switch is damaged or has poor contact, causing the electric hoist to fail to start.

Circuit failure: The main circuit of the electric hoist is damaged, the circuit is disconnected or the contact is poor, which affects the normal operation of the electric hoist.

Other factors

Environmental factors: Electric hoists work in harsh environments for a long time, such as high temperature, humidity, corrosion, etc., which accelerate the aging and damage of their components.

Improper operation: Frequent starting, emergency stopping, overloading, and other improper operations can also cause damage to the electric hoist.

2、 Maintenance methods

Motor maintenance

Regularly check whether the power supply voltage of the electric hoist is within the rated range. If there is any abnormality, contact the power maintenance personnel in a timely manner to solve it.

Avoid overloading the use of electric hoists and strictly operate according to the rated lifting capacity of the equipment.

Regularly check the operation status of the motor. If there are any abnormal situations such as overheating or abnormal noises, the machine should be stopped for maintenance in a timely manner.

Transmission system maintenance

Regularly lubricate the transmission components of the electric hoist, use appropriate lubricating oil for maintenance, and ensure smooth operation of the transmission components.

Regularly inspect the wear of transmission components, and replace any worn or damaged components in a timely manner.

Electrical system maintenance

Regularly check the status of electrical components such as startup switches and circuits to ensure their normal operation.

Damaged electrical components should be replaced in a timely manner to ensure the normal operation of the electrical system of the electric hoist.

Environment and operation maintenance

Try to avoid using electric hoists in harsh environments. If unavoidable, additional protective measures should be taken.

Standardize operational behavior and avoid improper operations such as frequent starting, emergency stopping, and overloading.

Regular maintenance

Conduct regular comprehensive inspections on electric hoists, including motors, transmission systems, electrical systems, and other aspects.

Timely identify and handle potential issues to ensure the safe and stable operation of the electric hoist.

The main equipment produced by Hebei Makita: stage electric hoist, electric chian hoist, wire rope electric hoist，Hand chain hoist, lever hoist, pneumatic hoist and other lifting equipment