Device for lifting large loads within ceiling, has lifting spindle that is displaceably and non-rotatably held in axial direction in housing, and dome that is torque-proofly connected with housing

摘要

The device (1) has a housing (5) and a lifting spindle (9) that is formed as a hollow cylinder and has an outer thread (14) on an outer surface. A threaded bush (16) surrounds the spindle and has an inner thread (15) that is engaged with the outer thread. A drive unit rotatably drives the threaded bush. The spindle is displaceably and non-rotatably held in its axial direction in the housing. A dome (7) is torque-proofly connected with the housing. The spindle is torque-proofly and axially displaceable at the dome. A worm shaft is engaged with a worm wheel (18) of the threaded bush.