Working cylinder for a drive of an electric circuit breaker

Patent metadata

Field	Value
Publication number	US-9837222-B2
Application number	US-201414560540-A
Country	US
Kind code	B2
Filing date	Dec 4, 2014
Priority date	Jun 5, 2012
Publication date	Dec 5, 2017
Grant date	Dec 5, 2017

Abstract

An exemplary working cylinder for a drive of an electric circuit breaker includes a base that includes a cylinder head and a cylinder body that are connected to one another. Additional components are fastened to the cylinder head as a core piece of the drive, and a thrust ring is guided on an outer surface of the cylinder body. The thrust ring compresses mechanical springs in the mechanical resilient energy storage device by way of a storage piston in a storage module.

First claim

What is claimed is:

1. A drive for an electric circuit breaker of a high voltage switching device, comprising:
a mechanical resilient energy storage device; and
a working cylinder including a base body,
wherein a piston rod is guided in the working cylinder and a moving contact member of the electric circuit breaker is actuated via the piston rod,
wherein the base body is formed of two separate components including a cylinder head and a cylinder body, and wherein said two separate components are fastened to one another,
wherein a thrust ring is guided on an outer surface of the cylinder body to compress mechanical springs in the mechanical resilient energy storage device, and wherein an outer contour of the cylinder head is used as a bearing surface for supporting the thrust ring.

2. The drive as claimed in claim 1 , wherein the two separate components are fastened to one another via screws.

3. The drive as claimed in claim 1 , wherein a base plate is fastened to the cylinder body, which base plate is used as a counter surface for the mechanical springs.

4. The drive as claimed in claim 1 , wherein a contour is incorporated into the cylinder head as a damping ring.

5. The drive as claimed in claim 1 , wherein the piston rod includes a piston that is in physical contact with a running surface of the cylinder body.

6. The drive as claimed in claim 1 , wherein the piston rod is positioned co-axially with respect to the working cylinder and is received in a central through-going passage in the working cylinder.

7. A drive for an electric circuit breaker of a high voltage switching device, comprising:
a mechanical resilient energy storage device; and
a working cylinder including a base body,
wherein a piston rod is guided in the working cylinder and a moving contact member of the electric circuit breaker is actuated through the piston rod,
wherein the base body is formed of separate first and second components, and wherein said first and second components are connected by insertion of the first component into a cutout of the second component and are fastened to one another,
wherein a thrust ring is guided on an outer surface of the second component to compress mechanical springs in the mechanical resilient energy storage device, and
wherein an outer contour of the second component is used as a bearing surface for supporting the thrust ring of the mechanical energy storage device.

8. The drive as claimed in claim 7 , wherein the first and second components are fastened to one another via screws.

9. The drive as claimed in claim 7 , wherein the first component is a cylinder head and the second component is a cylinder body.

10. The drive as claimed in claim 9 , wherein a base plate is fastened to the cylinder body, which base plate is used as a counter surface for the mechanical springs.

11. A drive apparatus for an electrical circuit breaker of a high voltage switching device, the drive apparatus comprising:
a base including (i) a head including a cut-out defined therein and (ii) a body, the body including a through passage defined by a running surface of the body, and
a rod extending through the base, the rod including a piston arranged in contact with the running surface to reciprocate the rod through the base by hydraulic pressure to actuate the electrical circuit breaker,
wherein the body is received within the cut-out to connect to the head with the body by non-positive locking, and
wherein the rod extends through and contacts the head for guidance.

12. The drive apparatus of claim 11 , wherein the body and the head are connected to each other with fasteners extending into the cut-out.

13. The drive apparatus of claim 12 , wherein the fasteners extend between the head and the body parallel with the rod.

14. The drive apparatus of claim 11 , wherein the piston sections the through passage into pressure areas in fluid communication with at least one hydraulic pressure source to reciprocate the rod through the base by hydraulic pressure to actuate the electrical circuit breaker.

15. The drive apparatus of claim 11 , further comprising a thrust ring guided on an outer surface of the body.

16. The drive apparatus of claim 15 , wherein the thrust ring compresses mechanical springs in an energy storage device for storing energy for transfer through the drive apparatus.

17. The drive apparatus of claim 16 , wherein the base includes a base plate connected with the cylinder body as a counter surface for the mechanical springs.

Assignees

• Abb Technology Ag
• Abb Schweiz Ag

Inventors

• Knospe Jörg

Classifications

• H01H33/34 Primary

  hydraulic · CPC title

• H01H3/24

  using pneumatic or hydraulic actuator {(for storing energy in a spring motor H01H3/301)} · CPC title

• H01H3/301 Primary

  using a fluid actuator · CPC title

• H01H3/3031

  Means for locking the spring in a charged state · CPC title

• H01H2239/044

  High voltage application · CPC title