Operating principle of inline linear actuators

The electric linear actuator works by driving a pair of screw nuts after the motor is decelerated by the gear, converting the rotational motion of the screw nut into the linear motion of the telescopic rod. The operation of the linear motor is to complete the telescopic action by switching the rotational motion of the motor, the pusher action is done by using the motor forward and reverse, and the linear actuator stroke can be increased or decreased by changing the length of the lever arm.

The structure of the tubular linear actuator is mainly composed of hardware parts, screw, nut, casing, sliding seat, spring, housing and safety switch and other parts. If precision control or synchronous control is required, Hall sensor needs to be added at the end fixture of the actuator; in order to prevent abnormal conditions during the operation of the electric push rod causing excessive current to burn out the motor, additional current protection is added.

There are two main transmission forms of linear actuator: worm gear transmission and gear transmission. Gear transmission is a small screw rod installed in the inner tube after the motor passes through the reduction gear, and drives the connection with it to make an axial running nut. When reaching the set stroke, the nut tentacles press the limit switch to disconnect the power supply, and the motor stops moving (the reverse is the same). Optional power distribution positioner, used to display the travel status of the electric push rod, can also be equipped with an encoder, to achieve a complete stroke in several steps.

Linear actuators can not only reduce the use of pneumatic actuator required gas source devices and auxiliary equipment, but also reduce the weight of the executive body, the use of electric putter actuator, in changing the control openness, the need for power supply, when the desired openness can no longer be powered, so from the point of view of energy saving, electric linear actuator has obvious energy-saving advantages than pneumatic actuator, and Antuator tubular linear actuator with slim design is quite suitable for applications which the installation space is limited.