Assemblies: Lifting pillars precisely position large loads
SKF’s “TMS” telescopic lifting pillars can provide fast, quiet, and precise movement of large loads, such as diagnostic imaging tables used in computed tomography (CT), magnetic resonance imaging (MRI), nuclear imaging, x-ray, and similar medical applications. The pillars’ optimized stroke/retracted length ratios provide make it possible to lift centric loads up to 400 kg and eccentric loads up to 150 kg through a distance of 2 m. The pillars incorporate three telescopic aluminum profiles mounted on two circulating ball rollers. Their drives work on push load (force up to 4,000 N or 900 lbs.). Stroke lengths range from 300 mm to 700 mm; retracted lengths from 326 mm to 526 mm; and speeds from 16 mm/sec to 28 mm/sec.
Standard versions include “TMS Easy” and “TMS Mechanical” versions. The Easy version features two dc motors with worm-gear drives. Rotational motion through a spindle-nut system is converted to linear motion for lift. The linear drive is self-locking in each position, virtually maintenance-free, and includes safety limit-switches. The Mechanical version ships without drive motors for easy integration with existing drive systems and control units. A double worm gear running two spindles implements lift motion. Spindle systems are self-locking as safeguards. Both versions can be customized to satisfy particular application requirements.
— C.G. Masi , senior editor