Drive for a switching device

Patent metadata

Field	Value
Publication number	US-9530580-B2
Application number	US-201414781347-A
Country	US
Kind code	B2
Filing date	Apr 15, 2014
Priority date	Apr 24, 2013
Publication date	Dec 27, 2016
Grant date	Dec 27, 2016

Abstract

A drive, for a switching device including a contact system with a fixed and a moving contact, including an actuator for operating the moving contact for closing or opening the contact system, and also a mechanical transmission device arranged between the moving contact and the actuator. The transmission device includes a toggle joint mechanism formed by a folding lever, pivotable about a stationary bearing, and a coupling element, connected to the folding lever via a moving bearing. The toggle joint mechanism is pivotable between a first end position and a second end position. When the changeover is made from the first to the second end position or vice versa, a maximum extended position occurs. The coupling element holds the moving contact in that position which closes the contact system in the first end position and in that position in which the contact system is open in the second end position.

First claim

The invention claimed is:

1. A drive for a switching device, the switching device including a contact system with a fixed contact and a moving contact, the drive comprising:
an actuator for activating the moving contact to close or open the contact system; and
a mechanical transmission device, arranged between the moving contact and the actuator, including
a toggle joint mechanism, formed by a folding lever and pivotable about a stationary bearing between a first end position and a second end position, wherein when a changeover is made from the first end position to the second end position or vice versa, a maximum extended position occurs, and
a coupling element, connected to the folding lever via a moving bearing, the coupling element securing the moving contact in the first end position in the position which closes the contact system, and in the second end position in the position in which the contact system is opened, wherein a control lever, with which the toggle joint mechanism is movable from the first end position to the second end position or vice versa, is additionally connected to the moving bearing, and wherein the control lever is deflectable by a gate lever, the gate lever being pivotable about a second stationary bearing.

2. The drive of claim 1 , wherein the coupling element is connected to the moving contact via a lifting element and a contact pressure spring, and wherein, in the extended position, the coupling element applies a maximum pressure force to the moving contact via the lifting element and the contact pressure spring.

3. The drive of claim 2 , wherein, in the first end position, the toggle joint mechanism includes a first extension angle between the folding lever and the coupling element, and in the second end position, the toggle joint mechanism includes a second extension angle between the folding lever and the coupling element, and wherein the first extension angle of the toggle joint mechanism is relatively larger than the second extension angle of the toggle joint mechanism.

4. The drive of claim 2 , further comprising:
a lifting drive, configured to be able to assume a first lifted position and a second lifted position.

5. The drive of claim 4 , wherein the lifting drive is coupled to the toggle joint mechanism such that a changeover of the lifting drive from the first lifted position into the second lifted position and back again to the first lifted position causes the end position of the toggle joint mechanism to be reset, either from the first end position into the second end position or from the second end position into the first end position.

6. The drive of claim 2 , wherein the toggle joint mechanism forms a component of a linkage.

7. A switching device comprising the drive of claim 2 .

8. The drive of claim 1 , wherein, in the first end position, the toggle joint mechanism includes a first extension angle between the folding lever and the coupling element, and in the second end position, the toggle joint mechanism includes a second extension angle between the folding lever and the coupling element, and wherein the first extension angle of the toggle joint mechanism is relatively larger than the second extension angle of the toggle joint mechanism.

9. The drive of claim 1 , further comprising:
a lifting drive, configured to be able to assume a first lifted position and a second lifted position.

10. The drive of claim 9 , wherein the lifting drive is coupled to the toggle joint mechanism such that a changeover of the lifting drive from the first lifted position into the second lifted position and back again to the first lifted position causes the end position of the toggle joint mechanism to be reset, either from the first end position into the second end position or from the second end position into the first end position.

11. The drive of claim 10 , wherein the lifting drive is connected to the gate lever, pivotable about the second stationary bearing such that when a changeover is made from the first lifted position into the second lifted position, said lifting drive pivots in the direction of the moving bearing, and when a changeover is made from the second lifted position into the first lifted position, said lifting drive pivots away from said moving bearing.

12. The drive of claim 10 , wherein when the changeover is made from the first lifted position to the second lifted position, the lifting drive extends the toggle joint mechanism from the first end position of the toggle joint mechanism via the control lever and moves the toggle joint mechanism beyond the extended position into an intermediate folded position, and when the changeover is made from the second lifted position to the first lifted position, said lifting drive moves said toggle joint mechanism from the intermediate folded position into the second end position of the toggle joint mechanism.

13. The drive of claim 9 , wherein the lifting drive is connected to the gate lever, pivotable about the second stationary bearing such that when a changeover is made from the first lifted position into the second lifted position, said lifting drive pivots in the direction of the moving bearing, and when a changeover is made from the second lifted position into the first lifted position, said lifting drive pivots away from said moving bearing.

14. The drive of claim 13 , wherein when the changeover is made from the first lifted position to the second lifted position, the lifting drive extends the toggle joint mechanism from the first end position of the toggle joint mechanism via the control lever and moves the toggle joint mechanism beyond the extended position into an intermediate folded position, and when the changeover is made from the second lifted position to the first lifted position, said lifting drive moves said toggle joint mechanism from the intermediate folded position into the second end position of the toggle joint mechanism.

15. The drive of claim 9 , wherein when the changeover is made from the first lifted position to the second lifted position, the lifting drive extends the toggle joint mechanism from the first end position of the toggle joint mechanism via the control lever and moves the toggle joint mechanism beyond the extended position into an intermediate folded position, and when the changeover is made from the second lifted position to the first lifted position, said lifting drive moves said toggle joint mechanism from the intermediate folded position into the second end position of the toggle joint mechanism.

16. The drive of claim 15 , wherein the intermediate folded position which the toggle joint mechanism reaches from the first end position is selected such that although the contact system is opened to such an extent that an arc which occurs between the fixed contact and the moving contact in the case of switching off just goes out, the completely opened contact position of the contact system is still not reached.

17. The drive of claim 9 , wherein, when the changeover is made from the first lifted position to the second lifted position, the lifting drive extends the toggle joint mechanism from the second end position of the toggle joint mechanism via the control lever, and moves the toggle joint mechanism beyond the extended position directly, without remaining in an intermediate folded position, to the first end position of the toggle joint mechanism.

18. The drive of claim 9 , wherein the control lever is not pivoted from the respective control lever end position present at the first lifted position to the respective other control lever end p

Assignees

• Siemens Ag

Inventors

• Böttcher Martin
• Freundt Karsten
• Last Philipp
• Sieting Maximilian

Classifications

• H01H3/52

  with means to ensure stopping at intermediate operative positions · CPC title

• H01H3/46 Primary

  using rod or lever linkage, e.g. toggle · CPC title