Switch apparatus of an electrical circuit breaker comprising a force transfer element and a holding element

Patent metadata

Field	Value
Publication number	US-9293271-B2
Application number	US-201414580313-A
Country	US
Kind code	B2
Filing date	Dec 23, 2014
Priority date	Mar 14, 2014
Publication date	Mar 22, 2016
Grant date	Mar 22, 2016

Abstract

A switch apparatus includes at least two contact levers, arranged rotatably about a common rotation axis and arranged, at least sectionally, parallel to one another and spaced apart. The contact levers each have two contact lever arms including contact sections for respectively making contact with one fixed mating contact section of a power line element. The two first contact lever arms make contact with a first force transfer element, and the two second contact lever arms make contact with a second force transfer element for applying a spring force. At least one force transfer element has, in touching sections for touching the contact lever arms, a bulge which extends radially outwards, for the uniform transfer of the spring force to the contact lever arms. At least one holding element of the two holding elements may be configured to be movable relative to the power line elements via an articulated bearing.

First claim

What is claimed is:

1. A switch apparatus of an electrical circuit breaker for interrupting a current flow of an electric current in an electrical circuit in an event of an occurrence of a tripping event, the switch apparatus comprising:
two contact levers, arranged rotatably about a common rotation axis and arranged, at least sectionally, parallel to one another and spaced apart from one another, the two contact levers each including two contact lever arms comprising contact sections each for respectively making contact with one respective fixed mating contact section of a power line element, wherein the two first contact lever arms, which extend on a first side of the rotation axis, make contact with a first force transfer element, and the two second contact lever arms, which extend on a second side of the rotation axis, make contact with a second force transfer element for applying a spring force to the contact lever arms, and wherein at least one force transfer element of the two force transfer elements has, in touching sections for touching the contact lever arms, a bulge, which extends radially outwards, for the uniform transfer of the spring force onto the contact lever arms.

2. The switch apparatus of claim 1 , wherein the force transfer element is arranged tiltably via its bulge relative to the power line elements.

3. The switch apparatus of claim 1 , wherein the bulge includes a spherical configuration, an elliptical configuration, a pyramidal configuration, a conical configuration, a cubical configuration, a prismatic configuration or a cylindrical configuration.

4. The switch apparatus of claim 1 , wherein the spring force is applied to the respective force transfer elements by at least two spring elements, wherein the spring elements each extend between the respective force transfer element and a holding element for holding the spring elements.

5. The switch apparatus of claim 4 , wherein the holding element is arranged movably relative to the power line elements by way of an articulated bearing.

6. The switch apparatus of claim 1 , wherein the touching sections of the force transfer elements each include at least one touching point for touching the contact lever arms, and wherein the touching points generate an identical lever arm independently of the positioning of at least one of the force transfer elements and the contact lever arms relative to the power line elements on each contact lever arm.

7. A switch apparatus of an electrical circuit breaker for interrupting a current flow of an electric current in an electrical circuit in an event of an occurrence of a tripping event, the switch apparatus comprising:
two contact levers, arranged rotatably about a common rotation axis arranged, at least sectionally, parallel to one another and spaced apart from one another, the two contact levers each including two contact lever arms comprising contact sections for respectively making contact with one respective fixed mating contact section of a power line element,

wherein a first holding element for holding at least one spring element for applying a spring force to the first contact lever arms, which extend on a first side of the rotation axis, and a second holding element for holding at least one spring element for applying a spring force to the second contact lever arms, which extend on a second side of the rotation axis, are arranged, and wherein at least one holding element of the two holding elements is configured so as to be movable relative to the power line elements by way of an articulated bearing.

8. The switch apparatus of claim 7 , wherein the articulated bearing comprises a revolute joint, to enable a pivoting movement of the holding element at least about a pivot axis, which extends substantially orthogonal or at a defined angle to the rotation axis.

9. The switch apparatus of claim 7 , wherein a spring force is applied to the respective holding elements by at least two respective spring elements, and wherein the spring elements each extend between the respective holding element and a force transfer element for transferring a spring force onto the contact lever arms.

10. The switch apparatus of claim 7 , wherein the switch apparatus includes at least one force transfer element.

11. The switch apparatus of claim 1 , wherein the at least one force transfer element extends along a longitudinal axis, which extends substantially parallel to or at an acute angle or at an obtuse angle to a rotation axis of the contact lever arms, and wherein the force transfer element extends along a first surface of the contact lever arms, and the holding element extends along a second surface, opposite the first surface, of the contact lever arms.

12. An electrical circuit breaker for interrupting a current flow of an electric current in an electrical circuit, comprising:
at least one switch apparatus as claimed in claim 1 .

13. The switch apparatus of claim 2 , wherein the bulge includes a spherical configuration, an elliptical configuration, a pyramidal configuration, a conical configuration, a cubical configuration, a prismatic configuration or a cylindrical configuration.

14. The switch apparatus of claim 2 , wherein the spring force is applied to the respective force transfer elements by at least two spring elements, wherein the spring elements each extend between the respective force transfer element and a holding element for holding the spring elements.

15. The switch apparatus of claim 14 , wherein the holding element is arranged movably relative to the power line elements by way of an articulated bearing.

16. An electrical circuit breaker for interrupting a current flow of an electric current in an electrical circuit, comprising:
at least one switch apparatus as claimed in claim 7 .

Assignees

• Siemens Ag
• Siemend Ag

Inventors

• Biedunkiewicz Pawel
• Dahl Jörg-Uwe

Classifications

• H01H3/3052

  Linear spring motors · CPC title

• H01H73/045

  Bridging contacts · CPC title

• H01H1/205 Primary

  Details concerning the elastic mounting of the rotating bridge in the rotor · CPC title

• H01H1/2025

  comprising two-parallel bridges · CPC title

• H01H1/2058

  Rotating bridge being assembled in a cassette, which can be placed as a complete unit into a circuit breaker · CPC title