SNLThe screw jack and worm gear screw jack mainly feature high efficiency, easy adjustment of the reduction ratio, and convenient installation and operation. They are also characterized by compact size, light weight, a wide range of power sources, and noiseless operation with multiple functions and high reliability. This series of products has an automatic locking function, enabling precise control and adjustment of lifting or advancement height according to a program. The structural forms are diverse, and the lifting height can be customized to meet customer requirements..
This lifting machine synchronizes the lifting of the base plate through corner movement, and connects it with four-point, six-point, and twelve-point motion chains, reducing the height of the base plate and minimizing movement errors. Additionally, the flat lifting feature allows for direct and rapid achievement of efficiency, saving space, increasing output, and ensuring higher quality stability.
Screw jack, also known as a helical drive mechanism.
It is primarily used to convert rotational motion into linear motion or vice versa. There are models that are mainly designed for energy transmission.(Spiral presses, jacks, etc.)There are also those that primarily transmit motion, such as the feed screw of machine tool worktables.)There are also spiral transmission mechanisms for adjusting the relative positions of parts. screw jacks are divided into sliding friction and rolling friction types. The sliding screw and nut mechanism is simple in structure, easy to process, low in manufacturing cost, and features self-locking capability; however, it has a large friction torque and low transmission efficiency.(30％～40％)The ball screw nut mechanism, despite its complex structure and high manufacturing cost, and the inability to self-lock, boasts the advantages of a small frictional torque and high transmission efficiency.(92％～98％)High precision, good system rigidity, reversible motion, long service life, thus widely used in mechatronic systems.
Screw jack mechanism1Principle of operation: Lead screw4With nuts1Ball bearings are housed between the threaded grooves.2As the screw or nut rotates, the ball2As the screw thread raceway rolls, rolling friction is generated between the screw and nut during relative motion. To prevent the ball from rolling out of the raceway, return guide devices are installed at both ends of the nut's helical groove.3They form a recirculating loop with the threaded raceways, allowing the ball bearings to circulate within the nut raceways. The transmission type varies depending on the combination of relative motion between the screw and nut. The basic transmission types of screw jacks include four types.(1)Nut fixation, screw rotation and movement; this type of transmission, due to the nut's inherent supporting role, eliminates the additional axial movement that might occur in screw shaft bearings. It features a simple structure and achieves high transmission accuracy. However, its axial dimensions should not be too long, otherwise, its rigidity will be poor.Therefore, it is only suitable for smaller events.(2)Ball screw rotation, nut movement; this transmission requires limiting the nut's rotation, thus necessitating a guiding device. Its features include a compact structure and good ball screw rigidity. Suitable for applications with a large working travel.
