The stepping motor acceleration and deceleration box is a deceleration stepping motor of the power transmission mechanism. The speed converter of the gear is used to decelerate the number of revolutions of the stepping motor to the required number of revolutions, and obtain a deceleration stepping mechanism with a large torque. motor.

■ The role of the stepping motor acceleration and deceleration box

1) Reduce the speed and increase the output torque at the same time. The torque output ratio is the motor output multiplied by the reduction ratio, but be careful not to exceed the rated torque of the reducer.

2) The speed reduces the inertia of the load at the same time, and the reduction of the inertia is the square of the reduction ratio. You can look at the general motor has an inertia value.

Knowledge point extension:

■ What types of gearboxes are used in stepper motors?

General reducers include helical gear reducers (including parallel shaft helical gear reducers, worm gear reducers, bevel gear reducers, etc.), planetary gear reducers, cycloidal pin wheel reducers, worm gear reducers, and planetary friction reducers. Mechanical stepless speed changer and so on.

■ Common types of stepper motor accelerators and decelerators

1) Ordinary gearbox

The main feature of the ordinary gearbox is that it has a reverse self-locking function and can have a larger reduction ratio. The input shaft and output shaft are not on the same axis or on the same plane. However, the volume is generally large, the transmission efficiency is not high, and the precision is not high.

2) Harmonic gearbox

The harmonic drive of the harmonic reducer uses the controllable elastic deformation of the flexible element to transmit motion and power. It is small in size and high in precision, but the disadvantage is that the life of the flexible wheel is limited, it is not resistant to impact, and its rigidity is compared with metal parts. Difference. The input speed should not be too high.

3) Planetary gearbox

The advantage of the planetary gearbox is that the structure is relatively compact, the return clearance is small, the precision is high, the service life is long, and the rated output torque can be made very large. But this kind of deceleration stepper motor with planetary gearbox is slightly more expensive.

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