Application and precautions of SF47 worm gear reducer in cranes

The SF47 worm gear reducer plays a crucial role in the operation system of the crane. It can not only achieve effective deceleration and torque increase, but also provide strong support for the smooth operation and precise control of the crane. Next, we will elaborate on its application in cranes and the precautions that need to be taken with examples.

1、 Application of SF47 worm gear reducer in cranes

（1） Lifting mechanism

The lifting mechanism of a crane requires precise control of the lifting speed and position of the heavy object, as well as reliable self-locking function to prevent the heavy object from sliding down when stopped. The large reduction ratio and self-locking characteristics of the SF47 worm gear reducer make it an ideal choice for lifting mechanisms.

For example, in a small gantry crane, the SF47 worm gear reducer is connected to the motor, which converts the high-speed rotation of the motor into the low-speed rotation of the drum through deceleration, achieving smooth lifting of heavy objects. Its self-locking function ensures that heavy objects will not slide due to their own weight when the motor stops running, ensuring the safety of the operation.

（2） Operating mechanism

The operating mechanism of the crane is responsible for the horizontal movement of the entire machine on the track. The SF47 worm gear reducer can provide appropriate deceleration and torque output for the operating mechanism, enabling the crane to start, accelerate, decelerate, and stop smoothly.

In the operating mechanism of a bridge crane, the SF47 worm gear reducer is connected to the wheel shaft, transmitting the power of the motor to the wheels, allowing the crane to move smoothly on the track. Through reasonable selection and configuration, precise positioning and stable operation of the crane can be achieved.

2、 Application examples

A certain factory needs to install a bridge crane with a rated lifting capacity of 10 tons for lifting large components on the production line. When designing the lifting mechanism, SF47 worm gear reducer was selected.

Firstly, calculate the required torque and power based on parameters such as the weight of the lifted object, lifting speed, and working level. After calculation, it has been determined that the required output torque of the reducer should not be less than 5000 N · m, and the power should be 15
kW。

Then, a suitable motor was selected to match the SF47 worm gear reducer. The rated speed of the motor is 1450 rpm, and the reduction ratio through the SF47 worm gear reducer is 80:1
The transmission ultimately achieves a drum speed of 18.125 rpm, meeting the requirements for lifting speed.

In actual operation, the lifting mechanism of this crane performs excellently, accurately lifting heavy objects to designated positions, and maintaining stability when stopped without any sliding phenomenon. The operating mechanism can also move smoothly on the track, meeting the production needs of the factory.