CN201689851U

CN201689851U - Galvanic circle structure of low-voltage circuit breaker

Info

Publication number: CN201689851U
Application number: CN2010201632716U
Authority: CN
Inventors: 郑改红; 张海燕
Original assignee: JIANGSU HUINENG ELECTRIC CO Ltd
Current assignee: JIANGSU HUINENG ELECTRIC CO Ltd
Priority date: 2010-04-16
Filing date: 2010-04-16
Publication date: 2010-12-29
Anticipated expiration: 2020-04-16

Abstract

The utility model discloses a galvanic circle structure of a low-voltage circuit breaker, wherein a fixed contact is connected with a fixed contact clamping piece which consists of three successive parts, the left part is in a square structure connected with a busbar and provided with a hole, the right part is in a double-piece clamping structure propping up relative to the middle part, and the fixed contact is rotatably arranged between the double-piece clamping structure; the middle part of the fixed contact clamping piece is lower than the left part and the right part; a moving contact is connected with a moving contact clamping piece which consists of a left part and a right part, wherein the left part is in a round-head double-piece clamping structure, the moving contact is rotatably arranged between the round-head double-piece clamping structure, the square structure of the right part is connected with a thermoelement, and the thermoelement and the line outgoing end of a tripping system are in an integral structure; and the whole galvanic circle does not have flexible connection or welding spots, thus effectively reducing the switch cost and the temperature rise, improving the dynamic thermal stability, and prolonging the electrical service life and the mechanical service life.

Description

The conducting loop structure of low-voltage circuit breaker

Technical field

The utility model relates to a kind of conducting loop structure, belongs to the current-carrying part of moulding case low-voltage circuit breaker.

Background technology

At present, moulding the case low-voltage circuit breaker current-carrying part is made up of contact system and tripping system.Wherein, contact system comprises fixed contact and moving contact, adopts to be flexible coupling between fixed contact and the end of incoming cables to be welded to connect, and welding is flexible coupling and a conversion row on the moving contact, and conversion row be connected with tripping system by screw; The thermal element of tripping system and outlet row welding.A current-carrying part of moulding case low-voltage circuit breaker has the many places welding, has been welded into the critical process that current-carrying part is made, and its defective is: the quality influence of welding the temperature rise and the performance of product, and the many places welding reduces production efficiency, causes unstable product quality.Be flexible coupling for avoiding adopting, generally adopt holder, and the part that holder generally uses behind moving contact and release connects, because the fixed contact supporting member all is a ferromagnetic material, so can't adopt the holder of electric conductor in the fixed contact part.

Summary of the invention

The purpose of this utility model is for overcoming above-mentioned the deficiencies in the prior art, provides a kind of and does not have solder joint, do not have and be flexible coupling, not only saved cost but also enhance productivity and the conducting loop structure of the low-voltage circuit breaker of properties of product.

The technical solution adopted in the utility model is: comprise fixed contact, moving contact, rotating shaft, tripping system and the thermal element on it, fixed contact connects the fixed contact holder, the fixed contact holder is made up of three continuous parts, left part is divided into the square structure with holes of a connection busbar, right part is divided into the biplate clamping structure of propping with respect to mid portion, and the fixed contact rotary setting is between this biplate clamping structure; The mid portion of fixed contact holder is lower than left and right sides two parts; Moving contact connects the moving contact holder, the moving contact holder is made up of left and right sides two parts, and left part is divided into a round end biplate clamping structure, between this round end biplate clamping structure of moving contact rotary setting, the square structure of right half connects thermal element, and the leading-out terminal of thermal element and tripping system is an overall structure.

The beneficial effects of the utility model are:

1, whole galvanic circle does not have the no solder joint that is flexible coupling, and effectively reduces switch cost and temperature rise, has improved dynamic thermal stability, electric life and mechanical endurance, the comprehensive properties of product that promoted.

2, production and installation process are simple, have simplified the processing and the installation of parts, and the part process height has significantly reduced the production time, has improved production efficiency.

Description of drawings

Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.

Fig. 1 is the 3-D view that the utility model dwindles;

Fig. 2 is the 3-D view of fixed contact holder 1 among Fig. 1;

Fig. 3 is the 3-D view of fixed contact 2 among Fig. 1;

Fig. 4 is the 3-D view that fixed contact holder 1 is connected with fixed contact 2;

Fig. 5 is the 3-D view of moving contact 4 among Fig. 1;

Fig. 6 is the 3-D view of moving contact holder 7 among Fig. 1;

Fig. 7 is the 3-D view that moving contact 4 is connected with moving contact holder 7;

Fig. 8 is the 3-D view of tripping system 8;

Among the figure: 1. fixed contact holder; 2. fixed contact; 3. clamping device; 4. moving contact; 5. first; 6. rotating shaft; 7. moving contact holder; 8. tripping system; 9. thermal element; 10. first hole; 11. second hole; 12. the 3rd hole; 13. the 4th hole; 14. the 5th hole; 15. second; 16. the 6th hole.

Embodiment

See Fig. 1, the conducting loop structure of low-voltage circuit breaker comprises the thermal element 9 on fixed contact 2, moving contact 4, rotating shaft 6, tripping system 8 and the tripping system 8.Fixed contact 2 contacts in rotating shaft 6 positions with moving contact 4.Wherein, fixed contact 2 is connected on the fixed contact holder 1.

As Fig. 2-4, fixed contact holder 1 is a nonferromagnetic material, form by three continuous parts, left part is divided into a square structure with holes, inlet wire busbar and fixed contact holder 1 are linked together with screw by this hole, right part is divided into the biplate clamping structure of propping with respect to mid portion, fixed contact 2 rotatable being arranged between the biplate clamping structure, first hole 10 is set on the biplate clamping structure, first hole 10 is run through by first 5 with second hole 11 on the fixed contact 2 and is connected, and fixed contact 2 can rotate freely around first 5 when guaranteeing reliable the connection.The mid portion of fixed contact holder 1 is lower than left and right sides two parts.In the biplate clamping structure position of fixed contact 2, and be positioned at first 5 bottom clamping device 3 is set, clamping device 3 is used to clamp fixed contact holder 1 and fixed contact 2.

As Fig. 7, moving contact 4 is connected on the moving contact holder 7, as Fig. 6, moving contact holder 7 is made up of two parts, left part is divided into a round end biplate clamping structure, and be provided with the 4th hole 13, moving contact 4 is between this biplate clamping structure, have the 3rd hole 12 on the moving contact 4, shown in Fig. 5-7, the 3rd hole 12 on the moving contact 4 is run through by second 15 mutually with the 4th hole 13 on the moving contact holder 7, and the two is connected by second 15, and moving contact 4 can be rotated freely, the rotating shaft assembling is formed in moving contact 4, moving contact holder 7 and rotating shaft 6.

As Fig. 6, the right half part of moving contact holder 7 is a square structure, has the 5th hole 14 on the square structure.As Fig. 8, thermal element 9 is connected on the tripping system 8, and thermal element 9 is provided with 16, the five holes 14, the 6th hole and the 6th hole 16 and matches and be fastened with screw.Tripping system 8 for the difference of no welding spot structure and traditional structure be exactly the leading-out terminal of thermal element 9 on it and tripping system 8 be one whole section conductor construction, lacked Welding Structure than traditional structure.

Fixed contact holder 1 of the present utility model adopts inlet wire mode down, be connected with fixed contact 2 by first 5, moving contact 4 is connected by second 15 with moving contact holder 7, moving contact holder 7 rear sections then are connected with release system 8 by screw, the outlet of thermal element 9 and release system 8 row is linked as an integral body, so no one is flexible coupling and welds in the whole galvanic circle.

Claims

1. the conducting loop structure of a low-voltage circuit breaker, comprise fixed contact (2), moving contact (4), rotating shaft (6), tripping system (8) and the thermal element on it (9), it is characterized in that: fixed contact (2) connects fixed contact holder (1), fixed contact holder (1) is made up of three continuous parts, left part is divided into the square structure with holes of a connection busbar, right part is divided into the biplate clamping structure of propping with respect to mid portion, and fixed contact (2) rotary setting is between this biplate clamping structure; The mid portion of fixed contact holder (1) is lower than left and right sides two parts; Moving contact (4) connects moving contact holder (7), moving contact holder (7) is made up of left and right sides two parts, left part is divided into a round end biplate clamping structure, between this round end biplate clamping structure of moving contact (4) rotary setting, the square structure of right half connects thermal element (9), and the leading-out terminal of thermal element (9) and tripping system (8) is an overall structure.

2. the conducting loop structure of low-voltage circuit breaker according to claim 1, it is characterized in that: moving contact (4) runs through by second (15) with moving contact holder (7) and is connected.

3. the conducting loop structure of low-voltage circuit breaker according to claim 1, it is characterized in that: fixed contact holder (1) runs through by first (5) with fixed contact (2) and is connected.

4. the conducting loop structure of low-voltage circuit breaker according to claim 3 is characterized in that: in the biplate clamping structure position of fixed contact (2) and the bottom that is positioned at first (5) clamping device (3) is set.