Contact press-on assembly

Patent metadata

Field	Value
Publication number	US-11107643-B2
Application number	US-201816630562-A
Country	US
Kind code	B2
Filing date	Jun 14, 2018
Priority date	Jul 14, 2017
Publication date	Aug 31, 2021
Grant date	Aug 31, 2021

Abstract

A contact press-on assembly for a switching contact piece of an electrical switching unit has a first stop and a second stop. A spring element extends between the two stops, wherein the first stop can move relative to the second stop. The second stop provides a counterbearing for the first stop, wherein a rotary bearing for the spring element can move together with the first stop.

First claim

The invention claimed is:

1. A contact press-on assembly for a switching contact piece of an electrical switching unit, the contact press-on assembly comprising:
stops including a first stop and a second stop, said first stop being movable relative to said second stop; and
a spring element extending between said first stop and said second stop, said second stop forming an abutment for said first stop and at least one of said stops providing a rotary bearing for said spring element, said rotary bearing being movable together with said first stop, said rotary bearing protecting said spring element from transverse forces introduced from outside;
wherein said abutment has a damping element for said first stop.

2. The contact press-on assembly according to claim 1 , wherein said first stop is guided by said second stop.

3. The contact press-on assembly according to claim 1 , wherein said stops are movable axially in relation to one another.

4. The contact press-on assembly according to claim 1 , wherein said first stop has a rotationally movable disk, which is supported on said second stop.

5. The contact press-on assembly according to claim 4 , wherein:
said first stop has a carrying element; and
said rotationally movable disk is connected to said carrying element of said first stop by way of a clearance fit.

6. The contact press-on assembly according to claim 1 , wherein said first stop has a guide pin, which is at least partially enclosed by said spring element.

7. The contact press-on assembly according to claim 6 , wherein said guide pin is guided by said second stop.

8. The contact press-on assembly according to claim 1 , wherein said first stop and said second stop are guided in a telescoping manner.

9. The contact press-on assembly according to claim 1 , wherein said spring element has a pressure stage.

10. An electrical switching device, comprising:
switching contact pieces including a first switching contact piece and a second switching contact piece, which are movable relatively in relation to one another;
a kinematic chain serving for a relative movement of said switching contact pieces in relation to one another, said kinematic chain having a contact press-on assembly, said contact press-on assembly containing:
stops including a first stop and a second stop, said first stop being movable relative to said second stop; and
a spring element extending between said first stop and said second stop, said second stop forming an abutment for said first stop and at least one of said stops providing a rotary bearing for said spring element, said rotary bearing being movable together with said first stop, said rotary bearing protecting said spring element from transverse forces introduced from outside;
wherein said abutment has a damping element for said first stop.

11. The electrical switching device according to claim 10 , further comprising a vacuum interrupter, said switching contact pieces defining a switching gap therebetween and disposed in said vacuum interrupter.

Assignees

• Siemens Ag

Inventors

• Schmidt Anne
• Zhao Ai Guang

Classifications

• H01H3/48

  using lost-motion device · CPC title

• H01H33/666

  Operating arrangements · CPC title

• H01H33/42

  Driving mechanisms · CPC title

• H01H1/502 Primary

  the action of the contact pressure spring becoming active only after engagement of the contacts · CPC title

• H01H2235/01

  Spiral spring · CPC title