The screw jack, as a fundamental lifting component, has become an indispensable part of modern machinery and equipment. It boasts numerous advantages, including light weight, a wide range of power sources, compact structure, small size, noiseless operation, easy installation, flexible use, diverse functions, and high reliability. It features multiple functions such as lifting, lowering, pushing, and flipping, and can accurately control and adjust the height of lifting or pushing according to a certain program. The screw jack is composed of components such as worm gears, housing, bearings, and screws. The screw jack is mainly divided into two types: trapezoidal screw jack and ball screw jack. Let's introduce the working principle and characteristics of the trapezoidal screw jack.

1. Drive Systems: DC motors 12/24V, single-phase AC motors, three-phase AC motors; no air/hydraulic source required.

2. Overload protection can be equipped with a safety clutch to prevent overload; an overload pressure sensor can also be installed to guard against overload.

3. High load push/pull capacity up to 250 tons.

4. The self-locking function is generally available in electric push rods with acme thread and screw jacks, as well as screw lifts, due to their low transmission power, most of which have dynamic self-locking capabilities, enhancing the safety of equipment operation; ball screw electric push rods and screw lifts do not have self-locking function.

5. Precision positioning: The directional accuracy reaches up to 0.1mm; the servo electric cylinder directional accuracy can reach 6um.

6. The encoder configuration is well-controlled, achieving closed-loop positioning through a variable frequency drive or controller; for applications with less stringent precision requirements, a potentiometer can be equipped for on-line control.

7. The synchronous single-speed motor drives multiple rods simultaneously through mechanical coupling, achieving synchronized lifting and lowering.

8. The trapezoidal screw lifting machine requires less maintenance compared to other lifting machines, produces low noise, and can operate normally in both high/low-temperature and corrosive/explosive harsh environments.

Key features include: self-locking function, synchronization, precision positioning, speed control, and thrust control.