Clutch device with eddy current brake with reduced air gap

Patent metadata

Field	Value
Publication number	US-2017191533-A1
Application number	US-201515308757-A
Country	US
Kind code	A1
Filing date	Apr 16, 2015
Priority date	May 9, 2014
Publication date	Jul 6, 2017
Grant date	—

Abstract

The invention comprises a clutch device having an actuating device, wherein the actuating device has an electrical eddy current brake. The eddy current brake has a brake stator with at least one coil and a brake rotor with a brake region, wherein the brake region has a first layer which is electrically conductive and which has a first lateral face and a second lateral face, the first lateral face facing toward the coil and the second lateral face facing away from the coil. The brake region has a second layer which is magnetic and which is connected to the second lateral face. The invention further comprises a corresponding production method.

First claim

What is claimed is:

1 - 10 . (canceled)

11 . A clutch device comprising an actuating device, wherein the actuating device includes an electrical eddy current brake, wherein the eddy current brake includes a brake stator with at least one coil and a brake rotor with a brake region, wherein the brake region includes a first layer which is electrically conductive and which includes a first lateral face and a second lateral face, the first lateral face facing toward the coil and the second lateral face facing away from the coil, wherein the brake region includes a second layer which is magnetic and which is connected to the second lateral face.

12 . A clutch device as recited in claim 21 , wherein the brake region is at least partially cylindrical and the second layer is made of a ring-shaped material.

13 . A clutch device as recited in claim 22 , wherein the second layer is attached to the second lateral face by means of a press fit.

14 . A clutch device as recited in claim 23 , wherein the second layer is located radially outside of the first layer, and the brake stator comprises an internal stator which contains the coil.

15 . A clutch device as recited in claim 25 , wherein there is a minimal air gap present between the internal stator and the first layer, which is smaller than a minimal air gap between the second layer and a stator component adjacent to the second layer.

16 . A clutch device as recited in claim 25 , wherein an extension of the second layer is greater in the axial direction than in the radial direction.

17 . A clutch device as recited in claim 26 , wherein the second layer is thicker than the first layer.

18 . A method for producing a clutch device comprising an actuating device, wherein the actuating device includes an electrical eddy current brake, wherein a brake stator with at least one coil and a brake rotor with a brake region are built into the eddy current brake, wherein the brake region is designed with a first layer which is electrically conductive and which includes a first lateral face and a second lateral face, the first lateral face being positioned facing toward the coil and the second lateral face being positioned facing away from the coil, characterized in that the brake region is designed with a second layer which is magnetic and which is connected to the second lateral face.

19 . A method as recited in claim 28 , wherein the second layer is attached to the second lateral face by means of a pressing process.

20 . A method as recited in claim 29 , wherein the second layer is pre-shaped in a ring form and the pressing process includes pressing the ring-type pre-shaped second layer onto a cylindrical wall region of the brake rotor.

Assignees

• Schaeffler Technologies Ag

Inventors

• Finkenzeller Marc
• Helmer Daniel

Classifications

• F16D2027/008

  Details relating to the magnetic circuit, or to the shape of the clutch parts to achieve a certain magnetic path · CPC title

• F16D27/02 Primary

  with electromagnets incorporated in the clutch, i.e. with collecting rings {(F16D27/004 takes precedence)} · CPC title

• F16D2250/0084

  Assembly or disassembly · CPC title