Contact device and electromagnetic contactor using same

Patent metadata

Field	Value
Publication number	US-2017358413-A1
Application number	US-201715459140-A
Country	US
Kind code	A1
Filing date	Mar 15, 2017
Priority date	Jun 14, 2016
Publication date	Dec 14, 2017
Grant date	—

Abstract

The contact device includes a main contact mechanism that includes a pair of main fixed contacts and a main movable contact elastically supported by a movable shaft and disposed to be contactable with and separable from the pair of main fixed contacts, an auxiliary contact mechanism that includes a pair of auxiliary fixed contacts and auxiliary movable contacts disposed in an auxiliary contact holding member connected to the movable shaft so as to be contactable with and separable from the pair of auxiliary fixed contacts, and a contact housing portion that houses the main contact mechanism and the auxiliary contact mechanism. The movable shaft has a main contact support portion supporting the main movable contact and an auxiliary contact support portion supporting the auxiliary contact holding member. The main contact support portion and the auxiliary contact support portion are connected to each other via the auxiliary contact holding member.

First claim

1 . A contact device comprising:
a main contact mechanism that includes a pair of main fixed contacts separated from each other and a main movable contact elastically supported by a movable shaft and disposed so as to be contactable with and separable from the pair of main fixed contacts; an auxiliary contact mechanism that is disposed at a different position from a position of the main contact mechanism, and that includes a pair of auxiliary fixed contacts separated from each other and an auxiliary movable contact disposed in an insulating auxiliary contact holding member connected to the movable shaft so as to be contactable with and separable from the pair of auxiliary fixed contacts; and a contact housing portion that houses the main contact mechanism and the auxiliary contact mechanism, wherein the movable shaft includes a main contact support portion for supporting the main movable contact and an auxiliary contact support portion for supporting the auxiliary contact holding member, the main contact support portion and the auxiliary contact support portion being divided from each other, and wherein the main contact support portion and the auxiliary contact support portion are connected to each other via the auxiliary contact holding member.

2 . The contact device according to claim 1 ,
wherein the main contact support portion is formed of an insulating material.

3 . The contact device according to claim 1 ,
wherein the main contact support portion and the auxiliary contact support portion are formed of a metal material.

4 . The contact device according to claim 3 ,
wherein the main contact support portion, the auxiliary contact support portion, and the auxiliary contact holding member are configured as insert-molded products.

5 . The contact device according to claim 1 ,
wherein the auxiliary contact holding member includes adhesive fixing portions that fix the main contact support portion and the auxiliary contact support portion to the adhesive fixing portions by using an adhesive.

6 . The contact device according to claim 1 ,
wherein opposing outer surfaces of the auxiliary contact holding member include screw fixing portions, respectively, to which a screw formed in the main contact support portion and a screw formed in the auxiliary contact support portion are screwed, respectively.

7 . The contact device according to claim 1 ,
wherein the main contact support portion includes a wipe amount adjusting portion that adjusts a contact wipe amount of the main contact mechanism.

8 . The contact device according to claim 6 ,
wherein the main contact support portion includes a pressure spring that biases the main movable contact against the pair of main fixed contacts side by one end of the pressure spring coming into contact with a surface of the main movable contact, which is opposite to the pair of main fixed contacts, a spring seat that receives another end of the pressure spring, and a fixing portion that fixes an axial position of the main movable contact, which is opposite to the pressure spring.

9 . The contact device according to claim 6 ,
wherein the wipe amount adjusting portion is configured to include a male screw that is formed in a connection portion between the main contact support portion and the auxiliary contact holding member, and a female screw that is screwed to the male screw.

10 . The contact device according to claim 7 ,
wherein the wipe amount adjusting portion is configured to include a male screw for mounting the pressure spring, and a nut serving as the fixing portion that is screwed to the male screw.

11 . The contact device according to claim 7 ,
wherein the wipe amount adjusting portion is configured to include a spacer that is interposed between the other end of the pressure spring and the spring seat.

12 . The contact device according to claim 6 ,
wherein the main contact support portion includes a support shaft that is connected to the auxiliary contact holding member, and a main movable contact support that is mounted on an outer side of the support shaft, and wherein the main movable contact support includes a pressure spring that biases the main movable contact against the pair of main fixed contacts side by one end of the pressure spring coming into contact with a surface of the main movable contact, which is opposite to the pair of main fixed contacts, a spring seat that receives another end of the pressure spring, and a fixing portion that fixes an axial position of the main movable contact, which is opposite to the pressure spring.

13 . The contact device according to claim 11 ,
wherein the wipe amount adjusting portion is configured to include a male screw that is formed in the support shaft, and a female screw that is formed on an inner surface of the main movable contact support.

14 . The contact device according to claim 11 ,
wherein the wipe amount adjusting portion is configured to include an adjusting ring into which the support shaft is inserted so as to be interposed between the auxiliary contact holding member and the main movable contact support.

15 . The contact device according to claim 11 ,
wherein the wipe amount adjusting portion is configured to include an adjusting ring into which the support shaft is inserted so as to be interposed between the auxiliary contact holding member and the main movable contact support, and a nut serving as the fixing portion that is screwed to a male screw formed in the support shaft.

16 . An electromagnetic contactor comprising:
the contact device according to claim 1 , wherein the movable shaft is connected to a movable iron core, and the electromagnetic contactor includes an electromagnetic unit that moves the movable iron core.

17 . The electromagnetic contactor according to claim 16 ,
wherein the electromagnetic unit includes a fixed iron core that faces the movable iron core, a control coil that is wound around the fixed iron core, and a magnetic yoke that surrounds an outer peripheral side of the control coil, wherein the movable iron core connected to the movable shaft is disposed inside a through-hole formed in a central portion of an upper magnetic yoke which forms the magnetic yoke, and wherein a periphery of the movable iron core is covered with a sealing cap.

Assignees

• Fuji Electric Fa Components & Systems Co Ltd

Inventors

• Tashima Yuki
• Takaya Kouetsu
• Adachi Hideo
• Naka Yasuhiro
• Sakurai Yuya
• KONISHI Koujun

Classifications

• H01H50/36

  Stationary parts of magnetic circuit, e.g. yoke · CPC title

• H01H2050/025

  containing inert or dielectric gasses, e.g. SF6, for arc prevention or arc extinction · CPC title

• H01H50/541 Primary

  Auxiliary contact devices · CPC title

• H01H2235/01

  Spiral spring · CPC title

• H01H50/56

  Contact spring sets · CPC title