Electromagnetic trip mechanism for low voltage circuit breaker

A low-voltage circuit breaker, electromagnetic tripping technology, applied in the direction of the protection switch operation/release mechanism, etc., can solve the problems of affecting the size of the circuit breaker, difficult to compact the internal components of the circuit breaker, miniaturized circuit breaker assembly, and complicated assembly, etc. The size is easy to adjust, the tripping performance is stable and reliable, and the structure is compact.

Inactive Publication Date: 2015-09-23
ANHUI KAICHENG ELECTRIC APPLIANCE CO LTD
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the electromagnetic tripping mechanism of this structure, the two sides of the armature need to be bent, and through holes need to be opened on it, which is not convenient for the process of the armature; The through hole corresponds to accommodate the support shaft to pass through, which is not conducive to saving parts. The assembly of the two is cumbersome and time-consuming. The installation of other devices such as bimetal components and operating mechanisms brings obstacles; when the circuit is short-circuited, the armature rotates, and its brake lever hits the drawbar in the operating mechanism, and the position of the armature should correspond to the drawbar, that is, it is specified The position of the electromagnetic tripping mechanism in the entire circuit breaker, so the position, shape, and size of the armature will affect the shape, size, and installation method of other parts of the circuit breaker, which will definitely affect the volume of the entire circuit breaker. It is difficult to realize the compact assembly of the internal components of the circuit breaker and the miniaturization of the circuit breaker itself

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Electromagnetic trip mechanism for low voltage circuit breaker
  • Electromagnetic trip mechanism for low voltage circuit breaker
  • Electromagnetic trip mechanism for low voltage circuit breaker

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Figure 1 to Figure 4 A specific embodiment of the invention is shown in which figure 1 It is a schematic diagram of a three-dimensional structure of the first structure of the present invention; figure 2 yes figure 1 A schematic diagram of the three-dimensional structure of the electromagnetic tripping mechanism shown when viewed from another angle; image 3 yes figure 1 A schematic diagram of the three-dimensional structure of the electromagnetic tripping mechanism shown after removing the bracket and the yoke; Figure 4 yes image 3 An exploded view of the electromagnetic trip mechanism shown.

[0024] This embodiment is an electromagnetic tripping mechanism for low-voltage molded case circuit breakers, see Figure 1 to Figure 4 As shown, it includes a bracket 1, an armature 2 rotatably arranged on the bracket 1, a yoke 3 placed between the bracket 1 and the armature 2, a return spring 4 for providing a return elastic force for the armature 2, and a return spr...

Embodiment 2

[0032] Figure 5 It is a schematic three-dimensional structural diagram of the second structure of the present invention, showing the second specific implementation manner of the present invention.

[0033] This embodiment is basically the same as Embodiment 1, except that: the reset rod 23 is provided with a plurality of hooking notches 231, and one end of the torsion spring is hooked into a corresponding hooking notch 231 on the reset rod 23 , and the other end is hooked on the bracket 1.

[0034] In this embodiment, the resetting elastic force of the spring can also be adjusted by adjusting the hooking position of the torsion spring, thereby adjusting the electromagnetic force required for tripping.

Embodiment 3

[0036] Figure 6 It is a three-dimensional schematic diagram of the third structure of the present invention, showing the third specific implementation manner of the present invention.

[0037] This embodiment is basically the same as Embodiment 1, the difference is that this embodiment no longer sets the hook adjustment member, but directly sets a hook hole 16 on the side wall 11 of the bracket, and the other end of the torsion spring directly Hook in the hook hole 16 .

[0038] The structure of this embodiment is relatively simplified, and the assembly operation is relatively simplified and the cost is reduced due to the cancellation of the hooking adjusting member.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses an electromagnetic trip mechanism for a low-voltage circuit breaker. The electromagnetic trip mechanism comprises a bracket, an armature which is rotationally arranged on the bracket, a magnet yoke arranged between the bracket and the armature, a reset spring for providing resetting elastic force for the armature, and a pin shaft arranged on the bracket, wherein the bracket comprises two side walls and a connecting wall for connecting the two side walls; pivoting grooves are formed on the side walls; the armature comprises an actuating plate, two pivoting bosses which protrude out of the edges of the left and right sides of the actuating plate, and a reset rod positioned on the top of the actuating plate; each pivoting boss of the armature is positioned on a corresponding pivoting groove on the side wall of the bracket; the reset spring is a torsional spring sleeved on the pin shaft; and one end of the torsional spring is hooked on the armature, and the other end of the torsional spring and the bracket are fixedly arranged in an opposite way. The electromagnetic trip mechanism has the advantages of being compact in structure and relatively stable and relatively reliable in trip performance.

Description

technical field [0001] The invention belongs to the technical field of circuit breakers, and in particular relates to an electromagnetic tripping mechanism for low-voltage circuit breakers. Background technique [0002] Circuit breakers are widely used products as overload, short circuit and undervoltage protection devices in low-voltage power distribution systems and motor protection circuits. The structure of a circuit breaker generally consists of a contact system, an arc extinguishing device, an operating mechanism, a tripping device, a plastic casing and optional accessories. The contact system includes dynamic and static contacts connected in pairs in the line. When the line where the circuit breaker is located is overloaded, short-circuited, under-voltage and other faults, the dynamic and static contacts will be opened within the specified time to cut off the line to protect the line and power equipment. Damaged; the arc extinguishing device is used to extinguish the...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): H01H71/24
Inventor 刘开成
Owner ANHUI KAICHENG ELECTRIC APPLIANCE CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap