Clapping type electromagnetic tripping system

Patent metadata

Field	Value
Publication number	US-9640356-B2
Application number	US-201515112342-A
Country	US
Kind code	B2
Filing date	Jan 16, 2015
Priority date	Jan 17, 2014
Publication date	May 2, 2017
Grant date	May 2, 2017

Abstract

A clapping type electromagnetic tripping system comprises an iron core with a U-shaped structure, an armature, a heating element, a bimetallic element and a connecting plate; a bracket extends into a U-shaped groove of the iron core and is fixedly connected with the iron core, and a wire connecting the heating element and the connecting plate surrounds the iron core and the bracket; the bracket twined round by the wire is fixedly connected with the middle part of the heating element, the bottom end of the heating element and the bottom end of the bimetallic element are fixedly connected with a supporting member together, and the armature is hung on the bracket surrounded by the wire; and the armature and the iron core twined round by the wire are arranged oppositely to form a magnetic loop, and one end of the armature is attracted by the iron core so as to swing when short-circuit current is generated. The clapping type electromagnetic tripping system disclosed by the present invention-creation is simple and reasonable in structure and can enable the armature to be attracted reliably.

First claim

The invention claimed is:

1. A clapping type electromagnetic tripping system, comprising an iron core with a U-shaped structure, an armature, a heating element, a bimetallic element and a connecting plate, wherein a bracket extends into a U-shaped groove of the iron core and is fixedly connected with the iron core, and a wire connecting the heating element and the connecting plate surrounds the iron core and the bracket; the bracket twined round by the wire is fixedly connected with the middle part of the heating element, the bottom end of the heating element and the bottom end of the bimetallic element are fixedly connected with a supporting member together, and the armature is hung on the bracket twined round by the wire; and the armature and the iron core twined round by the wire are arranged oppositely to form a magnetic loop, and one end of the armature is attracted by the iron core so as to swing when short-circuit current is generated.

2. The clapping type electromagnetic tripping system according to claim 1 , wherein, the armature comprises a sheet attracting portion, a first hanging pillar and a second hanging pillar which are connected with the attracting portion, and bending portions which are arranged at positions where the attracting portion is connected with the first hanging pillar and the second hanging pillar, and extend towards the iron core; and a pair of projections which are in mounting fit to the bracket are disposed on the first hanging pillar and second hanging pillar, and a propping portion which is used for triggering a tripping action and is bent in a direction away from the iron core is disposed at the end portion of the first hanging pillar.

3. The clapping type electromagnetic tripping system according to claim 1 , wherein, the iron core is of a U-shaped structure composed of two sides and a bottom surface, the two sides are uniform in shape and symmetrically disposed, and a bevel edge which can increase a swing range of the armature along a movement direction of the armature which is being attracted is disposed on each of the two sides.

4. The clapping type electromagnetic tripping system according to claim 1 , wherein, the bracket comprises a sheet assisting portion which extends into the U-shaped groove of the iron core and is fixedly connected with a bottom surface of the iron core, a pair of armature supporting arms which extends towards the armature is disposed at the upper end of the assisting portion which is fixedly connected with the bottom surface of the iron core, and each of the pair of armature supporting arms is provided with a groove which is mounting fit to the iron core.

5. The clapping type electromagnetic tripping system according to claim 2 , wherein the middle part of the bottom end of the attracting portion of the armature is recessed, and a pair of bottom legs are disposed at two sides of the attracting portion.

6. The clapping type electromagnetic tripping system according to claim 2 , wherein, the iron core is disposed opposite to the attracting portion of the armature, and a width W 2 of the core iron is equal to a width W 1 of the attracting portion of the armature.

7. The clapping type electromagnetic tripping system according to claim 6 , wherein, a height H 2 of the iron core is equal to a height H 1 of the attracting portion of the armature.

8. The clapping type electromagnetic tripping system according to claim 5 , wherein the supporting member comprises a supporting member connecting sheet which is disposed under a recess in the middle part of the bottom end of the armature, and a connecting member fixing portion which is fixedly connected with the bottom end of a bimetallic sheet, and the conjunction between the supporting member fixing portion and the supporting member connecting sheet is of a vertical structure.

9. The clapping type electromagnetic tripping system according to claim 1 , wherein a second wire which does not twine round the bracket and the heating element and is connected to the wire in parallel is also connected between the heating element and the connecting plate.

10. The clapping type electromagnetic tripping system according to claim 1 , wherein, the wire which twines round the iron core and the bracket is an enameled wire or a flexible connecting wire.

Assignees

• Zhejiang Chint Electrics Co Ltd

Inventors

• Jiang Huahua
• Diao Zengjin
• Zheng Yingchuan
• Liu Yanan

Classifications

• H01H71/402

  in which the thermal mechanism influences the magnetic circuit of the electromagnetic mechanism · CPC title

• H01H2071/407

  the thermal element being heated by the coil of the electromagnetic mechanism · CPC title

• H01H71/40 Primary

  Combined electrothermal and electromagnetic mechanisms · CPC title

• H01H71/164

  Heating elements · CPC title

• H01H71/2472

  with rotatable armatures · CPC title