Electrical switching unit with separable contacts

Patent metadata

Field	Value
Publication number	US-11062858-B2
Application number	US-202016992710-A
Country	US
Kind code	B2
Filing date	Aug 13, 2020
Priority date	Sep 12, 2019
Publication date	Jul 13, 2021
Grant date	Jul 13, 2021

Abstract

An electrical switching unit with separable contacts comprises a switching device comprising: a control lever coupled mechanically to a mobile electrical contact and an anti-bounce lever, mounted on the control lever and configured to be displaced to a deployed position to cooperate with an abutment to prevent the control lever from leaving its position.The switching device comprises a fixed bearing mounted around the control lever. The anti-bounce lever comprises a contact portion which is in contact against an edge of the bearing when the anti-bounce lever is in its rest position and which is displaced along the edge when the control lever rotates about the bearing. The bearing comprises, on the edge, a guiding portion in the form of a cam configured to push the anti-bounce lever to its deployed position.

First claim

The invention claimed is:

1. An electrical switching unit with separable contacts, comprising a switching device comprising:
a fixed electrical contact and a mobile electrical contact that can be displaced between a closed position and an opened position;
a control lever coupled mechanically to the mobile electrical contact, the control lever being rotationally mobile, about a first axis of rotation, between a first position and a second position, by being configured so that the displacement of the control lever from the first position to the second position causes a displacement of the mobile contact from the closed position to the opened position;
an anti-bounce lever, mounted on the control lever by a pivot link and being able to be displaced, by virtue of the pivot link, in rotation about a second axis of rotation parallel to the first axis of rotation, between a rest position and a deployed position; the anti-bounce lever being configured to be displaced from the rest position to the deployed position when the control lever reaches the second position and to cooperate with an abutment of the switching device when the anti-bounce lever is in its deployed position and the control lever is in the second position to prevent the control lever from leaving the second position;
wherein the switching device comprises a fixed bearing mounted around the control lever, the anti-bounce lever comprising a contact portion which is in contact against an edge of the fixed bearing when the anti-bounce lever is in its rest position and which is displaced along said edge when the control lever rotates about the bearing,
and wherein the fixed bearing comprises, on said edge, a cam-shaped guiding portion configured to push the anti-bounce lever to its deployed position.

2. The electrical switching unit according to claim 1 , wherein the contact portion takes the form of a protuberance directed at right angles to the plane of the anti-bounce lever.

3. The electrical switching unit according to claim 1 , wherein the fixed bearing is in the form of a ring.

4. The electrical switching unit according to claim 1 , wherein the fixed bearing is secured to a framework of the unit.

5. The electrical switching unit according to claim 1 , wherein the anti-bounce lever extends essentially in a geometrical plane at right angles to the first and second axes of rotation.

6. The electrical switching unit according to claim 1 , wherein the anti-bounce lever comprises a first lobe and a second lobe that are linked to one another by a central part, the pivot link between the anti-bounce lever and the control lever being formed by one of the lobes of the anti-bounce lever.

7. The electrical switching unit according to claim 1 , wherein the control lever comprises a first arm on which is formed the pivot link with the anti-bounce lever and a second arm on which is formed another pivot link with a connecting piece connected to the mobile contact to ensure the coupling between the control lever and the mobile contact, the first arm and the second arm being at right angles to the first axis of rotation and being secured to a control shaft of the unit extending along the first axis of rotation and wherein the fixed bearing is mounted around said control shaft.

8. The electrical switching unit according to claim 1 , wherein the abutment is arranged to limit the travel of the control lever between the first position and the second position.

9. The electrical switching unit according to claim 7 , wherein the abutment is arranged to limit the travel of the control lever between the first position and the second position and wherein the abutment is in contact with the second arm when the control lever is in the second position and in contact with the first arm when the control lever is in the first position.

10. The electrical switching unit according to claim 1 , wherein the unit is a multipole unit comprising one or more additional switching devices similar to the switching device, the unit also comprising a control shaft common to the switching devices to simultaneously control the displacement of the respective control levers of the switching devices.

Assignees

• Schneider Electric Ind Sas

Inventors

• Bach Christian
• Herreros Javier

Classifications

• H01H71/04

  Means for indicating condition of the switching device {(by means of an auxiliary contact H01H71/46)} · CPC title

• H01H2001/508

  with mechanical means to prevent return/reverse movement of movable contact once opening or closing cycle has started · CPC title

• H01H1/50 Primary

  Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position · CPC title

• H01H2003/326

  using bearings · CPC title

• H01H3/42

  using cam or eccentric · CPC title