May 25, 2023

What Are the Types of Reducers?

Reducer, also known as reducer, is a transmission device used in mechanical devices to match the speed and transmit torque. Let’s take a look at the function and classification of the reducer.

What is a reducer?

A reducer is a reduction transmission device, which is an independent component composed of a gear drive, a worm drive, and a gear-worm drive enclosed in a rigid shell. It is widely used in modern machinery. It is a relatively precise machine. Also known as reducer.

What is the role of the reducer?

The reducer is generally used for transmission equipment with low speed and high torque. It plays the role of matching speed and transmitting torque between the prime mover and the working machine or actuator. It has two main functions:
1. Reduce the speed and increase the output torque at the same time. The torque output ratio is multiplied by the motor output and the reduction ratio, but attention should be paid not to exceed the rated torque of the reducer.
2. The deceleration reduces the inertia of the load at the same time, and the reduction of the inertia is the square of the deceleration ratio.

Gearbox for Intelligence Equipment

What are the types of reducers?
There are many types and models of reducers, which can be divided into different types according to different classification methods

1. According to the transmission type
(1) Gear reducer: It uses gear transmission at all levels to achieve the purpose of speed reduction. It is composed of gear pairs at all levels. The small gear drives the large gear to achieve a certain deceleration purpose.
(2) Worm reducer: Also known as worm gear reducer, it is a power transmission mechanism that uses the speed converter of the gear to reduce the number of revolutions of the motor (motor) to the desired number of revolutions and obtain a larger torque.
(3) Planetary gear reducer: Planetary gear is used to achieve the purpose of deceleration. It is widely used in servo, stepping, DC and other transmission systems due to its small size, high transmission efficiency, wide deceleration range, and high precision.

2. According to the different transmission stages
(1) Single-stage reducer: There is only one driving gear or worm (set on the driving shaft, driven by the motor, and one driven gear (output movement) meshes.
(2) Multi-stage reducer: The driven gear inside meshes with another gear (this gear outputs movement), that is, the second-stage reduction, and the multi-stage reducer has multiple transmission stages.

3. According to the gear shape
It can be divided into cylindrical gear reducer and bevel gear reducer.

4. According to the layout of the transmission
(1) Expansion type: long-tailed helical teeth in the high-speed stage, and straight or helical teeth in the low-speed stage. Due to the asymmetrical arrangement of the gears relative to the bearings, the rigidity of the shaft is required to be relatively large, and the torque input and output ends are kept away from the gears, so as to Reduce the uneven distribution of load along the tooth width caused by the bending deformation of the shaft. This kind of reducer has a simple structure and is the most widely used.
(2) Shunt type: Generally, high-speed stage shunt is used. Since the gears are arranged symmetrically with respect to the bearings, the force on the gears and bearings is relatively uniform. In order to make the total axial force on the shaft smaller, the helical directions of the two pairs of gears should be opposite. This kind of reducer has a complex structure and is often used in places with high power and variable loads.
(3) Coaxial type: The axial size of the coaxial reducer is large, the intermediate shaft is long, and the rigidity is poor. When the oil immersion depth of the two large gears is similar, the bearing capacity of the high-speed gear cannot be fully utilized. Commonly used In places where the input and output shafts are coaxial.