Design and function

Design and function

An electric lifting cylinder is an electro-mechanical drive unit. A ball screw thread spindle or trapezoidal thread spindle are drive by an electric motor and produce a linear adjustment force. The electric lifting cylinders are offered in different designs and can be produced according to customer requirements. The difference between the designs is the connection between motor and threaded spindle. Spur gears, worm gears and toothed belt drives are used, for example.

 

Functional description using an electric lifting cylinder KV-20AP as an example

Design KV-20AP

A spur gear motor drives the ball screw thread spindle via an elastomer coupling. This is fixed in the bearing house via ball bearings. The ball screw thread nut converts the rotational motion of the threaded spindle to a linear motion. The ball screw thread nut is connected to the piston rod via the nut housing. The piston rod is guided in a sealing ring and slideway. The nut housing has sliding bearings and is secured against twisting. Swivel bearing consoles on the bearing housing and a rod end bearing on the piston rod are used for fixing.