The screw jack, also known as a helical drive mechanism, is primarily used to convert rotational motion into linear motion or vice versa. It includes those that mainly transmit motion, such as the feed screw of machine tool tables, as well as helical drive mechanisms for adjusting the relative positions of parts. The screw jack is composed of a worm gear reducer and a screw, with its减速 part being the worm drive, which uses the worm to drive the worm gear to achieve deceleration. The worm gear is equivalent to the nut of the lifting screw and is matched with the lifting screw.
Features of Screw Jacks:
1The working principle involves ball bearings placed between the screw thread groove of the lead screw and the nut.
2As the screw or nut rotates, the ball bearings roll along the thread raceway, creating rolling friction between the screw and nut during relative motion. To prevent the ball bearings from rolling out of the raceway, return guiding devices are installed at both ends of the nut's spiral groove.
3They form a circulating loop with the threaded raceway, allowing the ball to circulate within the nut raceway.
SWLScrew JackIt is accomplished through worm gear and screw to lift, lower, propel, and flip, serving as a fundamental lifting component and has been categorized as such.JB/T8809-1998 Standard. Widely used in various industries such as machinery, metallurgy, water conservancy, chemical, culture, and public health, it boasts advantages like compact structure, small size, light weight, easy installation, flexible operation, high reliability, stability, and long service life. It can be driven directly by an electric motor or other power sources, or manually. This series of worm gear lifting machines can be self-locking, with a load capacity of 2.5t to 120t, input speed of 1500r/min, lifting speed of 2.7m/min, various structural types and assembly methods, and operating temperature range from -20 to 100°C. The lifting height is manufactured according to customer requirements.
Type:
2.1 Structural Style
Type 1 - The worm and screw are connected by threads, with the screw moving axially.
Type 2 - The worm and screw are keyed together, with nuts fitted on the screw. The screw rotates, while the nut moves axially.
The SJ worm gear screw jack is a lifting component.Compared to other series of screw jacks, this model boasts numerous advantages such as compact structure, small size, easy installation, diverse input forms, high reliability, and long lifespan. It features lifting and lowering functions, as well as reverse operation via shaft components. It can be used individually or in combination with multiple units. This product can be powered by an electric motor or other driving devices, and can also be operated manually. It is widely applied in metallurgy, machinery, hydraulic, chemical industries, and more.
