Reinforced pin which hinge couples a rotatable shaft to the transfer link in a circuit breaker

Patent metadata

Field	Value
Publication number	US-9425004-B2
Application number	US-201414448804-A
Country	US
Kind code	B2
Filing date	Jul 31, 2014
Priority date	Oct 17, 2013
Publication date	Aug 23, 2016
Grant date	Aug 23, 2016

Abstract

A circuit breaker according to the present disclosure may include a movable contact configured to be brought into contact with or separated from the stationary contact; and a switching mechanism configured to switch the movable contact, wherein the switching mechanism includes a shaft rotatably installed therein; a transfer link configured to transfer a driving force from the shaft to the movable contact; and a pin configured to hinge-couple the shaft to the transfer link and insulate them from each other, and the pin is installed with a wear resistant member at a portion brought into contact with the shaft.

First claim

What is claimed is:

1. A circuit breaker, comprising:
a stationary contact installed in a fixed manner;
a movable contact configured to be brought into contact with or separated from the stationary contact; and
a switching mechanism configured to switch the movable contact,
wherein the switching mechanism comprises:
a shaft rotatably installed therein;
a transfer link configured to transfer a driving force from the shaft to the movable contact; and
a pin configured to hinge-couple the shaft to the transfer link and insulate them from each other,

wherein the pin is installed with a wear resistant member at a portion brought into contact with a shaft arm of the shaft,
wherein the pin comprises an insulating member formed in a cylindrical shape,
wherein the wear resistant member is formed with a pipe and attached to the portion brought into contact with the shaft arm of the shaft, and
wherein the wear resistant member is installed on the insulating member in a fixed manner not to be released therefrom.

2. The circuit breaker of claim 1 , wherein:
the insulating member is inserted into the wear resistant member; and
at least one end portion of the wear resistant member is deformed to burrow into the insulating member.

3. The circuit breaker of claim 1 , wherein the wear resistant member is formed of a material having a wear resistance greater than a wear resistance of the insulating member.

4. The circuit breaker of claim 3 , wherein:
the insulating member is formed of a polyethylene material; and
the wear resistant member is formed of a stainless steel material.

Assignees

• Lsis Co Ltd

Inventors

• Cho Seong Yeol

Classifications

• H01H71/10

  Operating or release mechanisms · CPC title

• H01H1/226

  having a plurality of parallel contact bars · CPC title

• H01H71/525 Primary

  comprising a toggle between cradle and contact arm and mechanism spring acting between handle and toggle knee · CPC title

• Y10T29/49105

  Switch making · CPC title

• H01H2221/024

  Transmission element · CPC title