Drive device for rotational and linear movements with decoupled inertias

Patent metadata

Field	Value
Publication number	US-9496779-B2
Application number	US-201113697305-A
Country	US
Kind code	B2
Filing date	Apr 4, 2011
Priority date	May 11, 2010
Publication date	Nov 15, 2016
Grant date	Nov 15, 2016

Abstract

A drive device includes a rotational drive device with a rotating stator and a rotating armature for displacing a shaft in a rotational movement and a linear drive device with a linear stator and a linear armature for displacing a shaft in a linear movement. The rotational drive device and the linear drive device are arranged axially one behind the other, with the rotating armature and the linear armature being connected to a respective shaft section. The shaft sections of the rotating armature and the linear armature are axially aligned and connected to each other in a rotationally fixed manner such that the shaft sections can move axially with respect to each other but they can only rotate together.

First claim

The invention claimed is:

1. A drive device, comprising:
a shaft;
a rotational drive device having a rotating stator and a rotating armature for imparting a rotational movement to the shaft, said rotating armature being connected to a first shaft section;
a linear drive device having a linear stator and a linear armature for imparting a linear movement to the shaft, the rotational drive device and the linear drive device being arranged coaxially one behind the other, said linear armature being connected to a second shaft section in axial alignment with the first shaft section, with the first and second shaft sections being connected to each other so as to be movable axially with respect to each other but rotatable only together; and
a detector, operably connected to a control and regulation facility, for ascertaining a highly dynamic movement of the shaft, said detector being at least one member selected from the group consisting of a sensor for detecting the linear movement of the shaft, and a hollow shaft sensor for detecting the rotational movement of the shaft,
wherein said first shaft section and said second shaft section having axially proximal end portions which are arranged telescopically in one another and axially distal end portions which are axially spaced from each other and connected to the rotating armature and to the linear armature respectively,
wherein said axially proximal end portions of said first shaft section and said second shaft section are arranged telescopically in one another with interposition of a torque linear bearing and radially inside said rotating armature of said rotational drive device.

2. The drive device of claim 1 , wherein the first and second shaft sections are connected to each other via a torque-proof connection in the form of a splined shaft connection or torque linear bearing.

3. The drive device of claim 1 , wherein at least one of the linear armature and the linear stator has an axial extent in correspondence to a movement stroke of the drive device.

4. The drive device of claim 1 , wherein the rotating armature is connected to the first shaft section in a torque-proof manner.

5. The drive device of claim 1 , further comprising an axial bearing for support of the linear armature.

6. The drive device of claim 1 , for use in a winding device for a coil of an electric machine or a plastic injection molding machine.

Assignees

• Mader Daniel
• Schunk Holger
• Vollmer Rolf
• Siemens Ag

Inventors

• Mader Daniel
• Schunk Holger
• Vollmer Rolf

Classifications

• H02K41/02 Primary

  Linear motors; Sectional motors · CPC title

• H02K21/14

  with magnets rotating within the armatures · CPC title

• H02K2201/18

  Machines moving with multiple degrees of freedom · CPC title

• H02K41/03

  Synchronous motors; Motors moving step by step; Reluctance motors (H02K41/035 takes precedence) · CPC title

• H02K16/00 Primary

  Machines with more than one rotor or stator {(machines for transmitting mechanical power from a driving shaft to a driven shaft and comprising structurally interrelated motor and generator parts H02K51/00; permanent magnet machines with multiple rotors or stators relatively rotated for vectorially combining the excitation fields or the armature voltages H02K21/029)} · CPC title