Working principle and application analysis of deceleration motor

Release Time：

2025-07-11

The key to the problem of deceleration motor is to clarify how the two parts of "deceleration" and "motor" work together. We have to start with the motor itself - whether it is a DC motor or an AC motor, they generally output high speed and low torque, which is often not sufficient in practical applications. For example, when an electric push rod needs to move vigorously and slowly, a gearbox is needed to take effect.

The core of a gearbox lies in the transmission ratio of the gear set. The two mainstream structures, planetary gears and worm gears, each have their own characteristics: planetary gears have high efficiency but complex structures, while worm gears can self lock but have low efficiency.

Reducer is an important mechanical device. It plays an important role as a transmission device in many industrial applications. Commonly used as a deceleration transmission device between the original moving parts and the working machine. Its main function is to reduce the speed while increasing the torque.

The reducer mainly relies on gears with fewer teeth on the input shaft meshing with large gears with more teeth on the output shaft to achieve the purpose of deceleration. Its transmission ratio is equal to the ratio of input speed to output speed, and also equal to the ratio of the number of passive gear teeth to the number of active gear teeth.

Its basic structure includes transmission components (gears or worms), shafts, bearings, housings, and gearbox accessories. Among them, the combination of gears, shafts, and bearings combines the small gear and shaft together, which can be called a gear shaft. As the main component of the gearbox, the casing needs to bear the pressure of all parts, so it must have a certain strength and stiffness.

worm gear reducer

Features: Large transmission ratio, compact structure, smooth transmission

It mainly relies on the meshing transmission of worm gear and worm to achieve deceleration. Worm is similar to a screw, with a larger lead angle, while worm gear is a specially shaped gear. When the worm rotates, power is transmitted to the worm wheel through the interaction between the helical tooth surface of the worm and the tooth surface of the worm wheel, thereby achieving deceleration.

Structurally, worm gear reducers typically include components such as a housing, worm gear, worm wheel, shaft, bearings, and oil seals. The box provides support and protection; Worm and worm gear are key components for achieving deceleration; The shaft is used to support the worm and worm gear and transmit torque; Bearings reduce friction and wear; Oil seals are used for sealing to prevent lubricant leakage and external impurities from entering.

Worm gear reducers are widely used in various mechanical transmission systems, such as lifting equipment, mining machinery, construction machinery, etc., especially suitable for situations that require large transmission ratios, limited space, and certain requirements for smoothness.