Patent ID: 9590471
Date: 2017-03-07
CPC Classifications: H02K

Claim:
1. A rotary lifting device, comprising: an actuator shaft having a longitudinal axis; a linear motor for moving the actuator shaft in the direction of the longitudinal axis thereof; and a rotary motor for rotating the actuator shaft about the longitudinal axis thereof; wherein the rotary motor has a hollow rotor, through which the actuator shaft extends and which is kinematically coupled to the actuator shaft in terms of rotation; and wherein the linear motor is arranged in a fixed manner relative to the rotary motor and has an armature, which is arranged coaxially with respect to the actuator shaft extending through the rotor of the rotary motor and which is kinematically coupled to the actuator shaft at a first longitudinal end thereof with respect to the movement of the actuator shaft in the direction of the longitudinal axis thereof; the rotary lifting device further comprising a step-down gear; wherein the step-down gear is arranged at a second longitudinal end of the actuator shaft and is arranged so as to be able to be moved relative to the rotary motor in the direction of the longitudinal axis of the actuator shaft; and wherein the step-down gear is kinematically coupled to the actuator shaft at the drive side of the step-down gear, both with respect to a movement in the direction of the longitudinal axis of the actuator shaft and with respect to a rotary movement about the longitudinal axis of the actuator shaft.