Actuation system for an electrical switching device

Patent metadata

Field	Value
Publication number	US-10811199-B2
Application number	US-201916587109-A
Country	US
Kind code	B2
Filing date	Sep 30, 2019
Priority date	Oct 3, 2018
Publication date	Oct 20, 2020
Grant date	Oct 20, 2020

Abstract

A locking module of an arming system including accumulation device, the module including a lever, second end including a bearing surface, the accumulation device exerting a thrust force on the first end when it is in the armed state; a lock element intended to adopt a first position to oppose the thrust force and a second position to stop opposing the thrust force; the module being characterized in that a shoe fixed to the lever is interposed between the bearing surface and the contact surface when the bearing surface is bearing against the contact surface, the width of the surface of the shoe in contact with the contact surface being greater than the width of the bearing surface.

First claim

The invention claimed is:

1. A locking module of an arming system provided with an accumulation means configured to release a mechanical energy during the switch from an armed state to a disarmed state, the module comprising:
a lever pivot-linked around a first pivot shaft, and which comprises a first end and a second end, the second end comprising a surface, called bearing surface, which has a width, called bearing width, the accumulation means exerting a thrust force on the first end when the accumulation means is in the armed state;
a lock element configured to adopt one or other of two positions called, respectively, first position and second position, the first position corresponding to a position for which the bearing surface is bearing against a contact surface of the lock element so as to oppose any rotation of the lever due to the thrust force and keep the accumulation means in the armed state, the second position corresponding to a retraction of the contact surface so as to allow the accumulation means to switch from the armed state to the disarmed state;
wherein a shoe, made of a metal leaf and fixed to the lever, is interposed between the bearing surface and the contact surface when the bearing surface is bearing against the contact surface, a shoe surface portion, called secondary surface, being in contact with the contact surface, said secondary surface having a width, called shoe width, greater than the bearing width.

2. The module according to claim 1 , wherein the shoe width is at least two times greater than the bearing width.

3. The module according to claim 1 , wherein the secondary surface has a roughness less than 1.6 μm Ra.

4. The module according to claim 1 , wherein the shoe also comprises a holding tongue which is engaged in a slit formed in the lever so as to secure the shoe to said lever.

5. The module according to claim 1 , wherein the lever comprises a hub overmoulded with plastic material ensuring a pivot link of said lever with the first pivot shaft, wherein the hub comprises a bore, passed through by the first pivot shaft, and extending over a length of at least three times the diameter of the pivot shaft.

6. The module according to claim 5 , wherein the lever comprises a metal plate of a thickness between 2 mm and 6 mm.

7. The module according to claim 1 , wherein the lock element is a half-moon pivot-linked around a second pivot shaft, essentially parallel to the first pivot shaft, the contact surface being defined by a section of the surface with cylindrical geometry of the half-moon.

8. The module according to claim 1 , wherein the arming system comprises a wheel mechanically coupled to the accumulation means and bearing a stop roller intended to apply the thrust force on the first end.

9. The module according to claim 8 , wherein the accumulation means comprises a spiral spring provided with a peripheral end and a central end mechanically linked to an arming shaft, via a groove formed in said arming shaft.

10. The module according to claim 9 , wherein the arming system is a closing mechanism of a current breaking device, the peripheral end being linked mechanically to the wheel which is in turn pivot-linked around the arming shaft.

11. The module according to claim 9 , wherein the arming system is an opening mechanism of a current breaking device, the peripheral end being held fixed, the wheel being fixedly linked with the arming shaft.

12. A control module of the current breaking device which comprises a module according to claim 10 .

13. A control module of the current breaking device which comprises a module according to claim 10 , an opening mechanism and the closing mechanism having a common arming shaft.

14. An electrical switch device comprising a control module according to claim 12 .

Assignees

• Schneider Electric Ind Sas

Inventors

• Treffot Dominique

Classifications

• H01H3/3042

  using a torsion spring · CPC title

• H01H3/3031 Primary

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

• H01H2001/223

  using a torsion spring · CPC title

• H01H5/16 Primary

  with auxiliary means for temporarily holding parts until torsion member is sufficiently strained · CPC title

• H01H3/38

  using spring or other flexible shaft coupling · CPC title