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The working principle of push rod DC motor
2020-01-09 13:47
The push rod DC motor is a product often referred to as a driver and actuator. Its working principle is to reduce the speed of the high-speed motor through various deceleration methods, and drive the screw rod to rotate, so that the nut presents a straight line on the screw rod. action.
The push rod DC motor drives a pair of screw nuts after gear reduction. Turn the rotary motion of the push rod DC motor into linear motion, and use the motor to complete the push rod action. Such as through a variety of levers, rocker or linkage and other mechanisms can complete the rotation, shaking and other complex actions. By changing the length of the lever arm, the stroke can be increased or enlarged.
Push rod DC motors are also divided into many types, including trapezoidal screw, ball screw and planetary ball screw. The most common is trapezoidal screw. The speed is adjusted by the pitch of the screw. The advantages of the push rod DC motor are that the price is cheaper and the self-locking force is better, because the bite of the trapezoidal structure is better than that of other structures, and the push rod DC motor has ultra-high cost performance. Relatively speaking, the price of the ball screw is more expensive, the self-locking force is poor, but the transmission efficiency is better, because there are a large number of balls in the screw, and the friction coefficient is smaller.
There is also a relatively rare planetary ball screw, the price is more expensive than the first two, but the service life is relatively long, the disadvantage is that the scope of use is relatively small, rarely can be applied.
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