Switchgear

Patent metadata

Field	Value
Publication number	US-10256058-B2
Application number	US-201515753483-A
Country	US
Kind code	B2
Filing date	Nov 16, 2015
Priority date	Nov 16, 2015
Publication date	Apr 9, 2019
Grant date	Apr 9, 2019

Abstract

A switchgear includes a first contact capable of reciprocating along a motion axis, and a second contact. The second contact includes a facing unit movable in a first direction from the first contact toward the second contact when the facing unit is pushed in by the first contact, a spaced unit spaced from the axis and urged in a direction toward the axis, and a regulating unit coupled to the facing unit. The spaced unit abuts on the regulating unit to restrict movement of the spaced unit in the direction toward the axis as the facing unit is located in the second direction. The spaced unit is released from abutment on the regulating unit to move in the direction toward the axis into abutment on the first contact as the facing unit moves in the first direction.

First claim

The invention claimed is:

1. A switchgear comprising a first contact disposed to be capable of reciprocating along a motion axis, and a second contact disposed on the motion axis, wherein
the second contact includes
a facing unit made of an insulating material and facing a distal end part of the first contact, the distal end part being located in a first direction, the first direction being a direction from the first contact toward the second contact, the facing unit being disposed to be movable in the first direction when the facing unit is pushed in by the distal end part of the first contact moving in the first direction,
an urging unit to urge the facing unit in a second direction, the second direction being a direction opposite to the first direction,
a spaced unit spaced from the motion axis and urged in a direction toward the motion axis, and
a regulating unit coupled to the facing unit,
the spaced unit abuts on the regulating unit to regulate movement of the spaced unit in the direction toward the motion axis as the facing unit is located in the second direction under action of an urging force of the urging unit,
the spaced unit is released from abutment on the regulating unit to remove the regulation of the movement of the spaced unit in the direction toward the motion axis as the facing unit is pushed in by the distal end part of the first contact to move in the first direction, and
the spaced unit is disposed without abutting on the first contact that reciprocates, as the regulating unit regulates the movement of the spaced unit in the direction toward the motion axis, and the spaced unit moves in the direction toward the motion axis into abutment on the first contact as the regulation by the regulating unit is removed.

2. The switchgear according to claim 1 , wherein
the regulating unit includes an abutment face to abut on the spaced unit from a side of the motion axis,
the abutment face approaches the motion axis as the abutment face extends in the second direction, and
the abutment face moves the spaced unit in a direction away from the motion axis when the regulating unit moves in the second direction.

3. The switchgear according to claim 1 , wherein
the spaced unit has a first protrusion and a second protrusion formed thereon, the first and second protrusions protruding toward the motion axis,
the first protrusion is formed away from the second protrusion in the second direction and is made of an arc resistant material, and
the distal end part of the first contact is made of an arc resistant material.

4. The switchgear according to claim 1 , wherein
the first contact has a tubular shape having a center axis defined by the motion axis,
the facing unit has a through hole formed therethough in parallel to the motion axis,
the second contact includes a main contact unit located on an inner side of the through hole as the second contact is viewed along the motion axis, and
the main contact unit is located away from the facing unit in the first direction as the facing unit is located in the second direction, and the main contact unit passes through the through hole to be exposed in the second direction beyond the facing unit and abuts on an inner wall of the first contact as the facing unit moves in the first direction.

Assignees

• Mitsubishi Electric Corp

Inventors

• Fujioka Masahiro
• Sadakuni Hitoshi
• Kawahigashi Masato
• Nakauchi Shinichiro

Classifications

• H01H33/045 Primary

  for arcs formed during closing · CPC title

• H01H33/02

  Details · CPC title

• H01H33/123

  in which the auxiliary contact pivots on the main contact-arm and performs a delayed and accelerated movement · CPC title

• H01H33/64

  wherein the break is in gas (vacuum switches H01H33/66) · CPC title

• H01H33/06

  Insulating body insertable between contacts · CPC title