Rotor arrangement for a slip ring assembly and rotary coupling arrangement comprising a rotor arrangement of this kind

Patent metadata

Field	Value
Publication number	US-10116110-B2
Application number	US-201715610723-A
Country	US
Kind code	B2
Filing date	Jun 1, 2017
Priority date	Dec 10, 2014
Publication date	Oct 30, 2018
Grant date	Oct 30, 2018

Abstract

A rotor arrangement for a slip ring assembly, comprising a shaft element and at least one contact ring. The shaft element is at least partially in the form of a hollow shaft with a hollow interior and a casing wall. The shaft element has a middle section and each contact ring is arranged on the shaft element in the middle section and is electrically insulated from the shaft element by means of an insulation. The middle section has at least one cutout through the insulation and the casing wall into the interior. Each contact ring is connected to a cable element which is guided through one of the at least one cutout into the interior. The shaft element has a first end section with an outer circumferential cross section for the rotationally fixed coupling. Furthermore, a rotary coupling arrangement comprising a rotor arrangement of this kind is proposed.

First claim

What is claimed is:

1. A rotor arrangement for a slip ring assembly, said rotor arrangement comprising a shaft element and at least one contact ring, wherein the shaft element is at least partially in the form of a hollow shaft with a hollow interior and a casing wall, wherein the shaft element has a middle section, wherein each contact ring is arranged on the shaft element in the middle section, wherein the middle section has at least one cutout through the casing wall into the interior, wherein each contact ring is connected to a cable element which is guided through one of the at least one cutout into the interior, and wherein the shaft element has a first end section with an outer circumferential cross section for a rotationally fixed coupling, wherein the middle section is offset in relation to the first end section by a flange, wherein the flange has an outside diameter which is larger than a smallest outside diameter of the first end section and larger than an outside diameter of the middle section, wherein a smallest outside diameter of the first end section is larger than an outside diameter of the middle section, wherein the outer circumferential cross section of the first end section is in the form of a profile cross section, wherein the shaft element is of integral design, wherein the rotor arrangement has more than one contact ring, wherein an insulating ring which electrically insulates adjacent contact rings from one another is arranged between two adjacent contact rings in each case, and wherein a further electrically insulating ring is arranged on the middle section adjacent the flange.

2. The rotor arrangement as claimed in claim 1 , wherein the shaft element is formed from a material which has a shear modulus of greater than 75 GPa.

3. The rotor arrangement as claimed in claim 1 , wherein each contact ring is electrically insulated from the shaft element by means of an insulation, wherein the at least one cutout is formed through the insulation and the casing wall into the interior.

4. The rotor arrangement as claimed in claim 1 , wherein the shaft element is formed from an electrically insulating material.

5. The rotor arrangement as claimed in claim 1 , wherein the shaft element is formed from a material which has a shear modulus of greater than 100 GPa.

6. The rotor arrangement as claimed in claim 3 , wherein the insulation comprises a sleeve which is composed of an electrically insulating material and which is arranged on the middle section of the shaft element.

7. The rotor arrangement as claimed in claim 3 , wherein the insulation comprises an adhesive layer, wherein the adhesive layer is provided by means of an adhesive which is composed of an electrically insulating material.

8. The rotor arrangement as claimed in claim 1 , wherein the shaft element has a second end section which is opposite the first end section and in which the casing wall is fully closed.

9. A rotor arrangement for a slip ring assembly, comprising a shaft element and at least one contact ring, wherein the shaft element is at least partially in the form of a hollow shaft with a hollow interior and a casing wall, wherein the shaft element has a middle section, wherein each contact ring is arranged on the shaft element in the middle section, wherein the middle section has at least one cutout through the casing wall into the interior, wherein each contact ring is connected to a cable element which is guided through one of the at least one cutout into the interior, and wherein the shaft element has a first end section with an outer circumferential cross section for a rotationally fixed coupling, wherein each contact ring is electrically insulated from the shaft element by means of an insulation, wherein the at least one cutout is formed through the insulation and the casing wall into the interior, wherein the insulation comprises an adhesive layer, wherein the adhesive layer is provided by means of an adhesive which is composed of an electrically insulating material, and wherein each contact ring is adhesively bonded onto the middle section.

10. The rotor arrangement as claimed in claim 9 , wherein respectively adjacent contact rings are arranged on the middle section in such a way that an air gap remains between said adjacent contact rings.

11. The rotor arrangement as claimed in claim 1 , wherein each contact ring has a radial inner face, a radial outer face and two side faces, and wherein each contact ring is connected to a cable element by way of one of said two side faces.

12. The rotor arrangement as claimed in claim 1 , wherein the rotor arrangement has at least fourteen contact rings.

13. The rotor arrangement as claimed in claim 1 , wherein the rotor arrangement has a number of cutouts which corresponds to the number of contact rings.

14. The rotor arrangement as claimed in claim 1 , wherein the rotor arrangement has at least one first cutout and one second cutout, wherein the first cutout and the second cutout are formed in the middle section such that they are offset in relation to one another in a circumferential direction.

15. A rotary coupling arrangement for a coordinate measuring device, comprising a slip ring assembly comprising a rotor arrangement for a slip ring assembly, comprising a shaft element and at least one contact ring, wherein the shaft element is at least partially in the form of a hollow shaft with a hollow interior and a casing wall, wherein the shaft element has a middle section, wherein each contact ring is arranged on the shaft element in the middle section, wherein the middle section has at least one cutout through the casing wall into the interior, wherein each contact ring is connected to a cable element which is guided through one of the at least one cutout into the interior, and wherein the shaft element has a first end section with an outer circumferential cross section for a rotationally fixed coupling, wherein the shaft element has a second end section which is opposite the first end section and in which the casing wall is fully closed, and
wherein the rotary coupling arrangement further comprises a rotatable coupling assembly which has a first end and a second end which is opposite the first end, wherein the first end has a coupling interface, and wherein the second end has a slip ring assembly interface for rotationally fixed coupling to the first end section of the rotor arrangement, and comprising a rotation position measuring system for ascertaining a rotation position of the rotor arrangement of the slip ring assembly, and wherein the second end section is arranged on or in the rotation position measuring system.

16. A rotary coupling arrangement for a coordinate measuring device, comprising a slip ring assembly comprising a rotor arrangement for a slip ring assembly, comprising a shaft element and at least one contact ring, wherein the shaft element is at least partially in the form of a hollow shaft with a hollow interior and a casing wall, wherein the shaft element has a middle section, wherein each contact ring is arranged on the shaft element in the middle section, wherein the middle section has at least one cutout through the casing wall into the interior, wherein each contact ring is connected to a cable element which is guided through one of the at least one cutout into the interior, and wherein the shaft element has a first end section with an outer circumferential cross section for a rotationally fixed coupling, the rotary coupling arrangement further comprising a rotatable coupling assembly which has a first end and a second end which is opposite the first end, wherein the fi

Assignees

• Zeiss Carl Industrielle Messtechnik Gmbh

Inventors

• Woletz Tobias
• Kaufmann Dieter

Classifications

• H01R39/64

  Devices for uninterrupted current collection · CPC title

• H01R2201/20

  for testing or measuring purposes · CPC title

• H01R39/34 Primary

  Connections of conductor to slip-ring · CPC title

• H01R39/14

  Fastenings of commutators or slip-rings to shafts · CPC title

• H01R43/10

  Manufacture of slip-rings · CPC title