MACHINE WITH DIRECT DRIVE

• US 20090206684A1
• Filed: 02/06/2009
• Published: 08/20/2009
• Est. Priority Date: 02/07/2008
• Status: Active Grant

• Current Assignee: Siemens AG
• Original Assignee: Siemens AG
• Inventors: MATSCHEKO, GERHARD, WOLTER, WOLFGANG, JAJTIC, ZELJKO, KNORR, MARKUS
• Granted Patent: US 7,928,613 B2
• Time in Patent Office: Days
• US Class Current: 310/12.310
• CPC Class Codes: H02K 16/00 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 Class Codes: H02K 2201/03 Machines characterised by aspects of the air-gap between rotor and stator
• CPC Class Codes: H02K 41/031 of the permanent magnet type
• CPC Class Codes: H02K 7/08 Structural association with bearings

Abstract

A machine includes a moving part and a direct drive for moving the moving part. The direct drive includes a stator and an armature unit which interacts with the stator. A coupling device couples the armature unit to the moving part to allow a movement of the moving part in relation to the armature unit. The direct drive further includes a spacer device to maintain a distance between an active region of the stator and an active region of the armature unit, thereby defining the air gap between the stator and the armature unit.

Claims

1. A machine, comprising:

a moving part;

a direct drive for moving the moving part, said direct drive comprising a stator, an armature unit interacting with the stator, and a spacer device to maintain a distance between an active region of the stator and an active region of the armature unit; and

a coupling device coupling the armature unit to the moving part to allow a movement of the moving part in relation to the armature unit.

2. The machine of claim 1, wherein the spacer device includes at least one pair of supporting rollers attached to the armature unit or to a segment of the armature unit.

3. The machine of claim 1, wherein the spacer device includes at least one rail attached to the stator, and at least one guide shoe attached to the armature unit or to a segment of the armature unit.

4. The machine of claim 1, wherein the coupling device is constructed to permit a movement of the moving part in relation to the armature unit in at least one direction which is different from a direction of motion of the armature unit.

5. The machine of claim 1, wherein the coupling device includes at least one flat strip-shaped metal element.

6. The machine of claim 1 wherein the coupling device has at least one joint connected to the armature unit or the moving part.

7. The machine of claim 1, wherein the joint is a ball joint.

8. The machine of claim 1, wherein the coupling device has two of said joint and a connecting rod to connect the joints, with the connecting rod extending in parallel relationship to a direction of motion of the armature unit.

9. The machine of claim 1, wherein the direct drive is designed in the form of an electric linear motor.

10. The machine of claim 9, wherein the stator has an element which extends in a straight line and has opposite sides, said armature unit being provided on one of the opposite sides of the element and connected to the movable part, said direct drive including a further said armature unit being provided on the other one of the opposite sides of the element and connected to a further said movable part, and a body rigidly connecting the moving parts to one another.

11. The machine of claim 1, wherein the body has a U-shaped configuration.

13. The machine of claim 11, wherein the direct drive is designed in the form of an electric linear motor, said armature having an element which extends in a straight line and has opposite side, said stator unit being provided on one of the opposite sides of the element and connected to the non-moving part, said direct drive including a further said stator unit being provided on the other one of the opposite sides of the element and connected to the non-moving part, wherein the non-moving parts are rigidly connected to one another.

12. A machine, comprising:

a non-moving part;

a moving part placed in opposite relationship to the non-moving part;

a direct drive for moving the moving part, said direct drive comprising a stator unit, an armature interacting with the stator, and a spacer device to maintain a distance between an active region of the armature and an active region of the stator unit; and

a coupling device coupling the stator unit to the non-moving part and allowing a deflection of the non-moving part with respect to the stator unit.