CN101819908B - Conducting loop structure of low-voltage circuit breaker - Google Patents

Abstract

The invention discloses a conducting loop structure of a low-voltage circuit breaker. A static contact is connected with a static contact clamping device which comprises three connecting parts: the left part is of a square structure which has a hole and is connected with a busbar; the right part is of a dual-plate clamping structure which is supported to the middle part, and the static contact is arranged between the dual-plate clamping structure in a revolving mode; the middle part of the static contact clamping device is lower than the left part and the right part; a dynamic contact is connected with a dynamic contact clamping device which comprises a left part and a right part, wherein the left part is of a round head dual-plate clamping structure, and the dynamic contact is arranged between the round head dual-plate clamping structure in a revolving mode; and a square structure of the right part is connected with a heating element which forms an integral structure with an outlet terminal of a tripping system. The whole conducting loop does not have soft connection and welding spots, the cost for switching on or off is lowered effectively, the temperature rise is lowered, the dynamic and thermal stability is enhanced, and the electric life and the mechanical life are prolonged.

Description

Conductive circuit structure of low voltage circuit breaker

technical field

The invention relates to a conductive loop structure, which belongs to the conductive part of a molded case low-voltage circuit breaker.

Background technique

At present, the conductive part of the molded case low-voltage circuit breaker consists of a contact system and a tripping system. Among them, the contact system includes a static contact and a moving contact. The static contact and the incoming line end are connected by soft connection welding, and the moving contact is welded with a soft connection and a transfer bar. Connection; thermal element and outlet bar of tripping system welded. The conductive part of a molded case low-voltage circuit breaker has multiple welds, and welding has become a key process for the manufacture of the conductive part. Its defects are: the quality of welding affects the temperature rise and performance of the product, and multiple welds reduce production efficiency, resulting in product The quality is not stable. In order to avoid the use of soft connections, clamping parts are generally used, and the clamping parts are generally used in the part connected with the release after the moving contact. Since the static contact support parts are all ferromagnetic materials, it cannot be used in the static contact part. Holder using conductors.

Contents of the invention

The object of the present invention is to overcome the shortcomings of the above-mentioned prior art, and provide a conductive circuit structure of a low-voltage circuit breaker without solder joints and soft connections, which not only saves costs, but also improves production efficiency and product performance.

The technical solution adopted in the present invention is: including static contacts, moving contacts, rotating shafts, tripping systems and thermal elements thereon, the static contacts are connected to the static contact holder, and the static contact holder is composed of three continuous The left part is a square structure with holes connected to the busbar, the right part is a double-piece clamping structure supported relative to the middle part, and the static contact is rotatably arranged between the double-piece clamping structures; the static contact The middle part of the head holder is lower than the left and right parts; the moving contact is connected with the moving contact holder. The head is rotated and set between the double-piece clamping structure of the round head, and the square structure on the right part is connected to the heating element, and the outlet end of the heating element and the tripping system is an integral structure.

The beneficial effects of the present invention are:

1. The entire conductive circuit has no soft connection and no solder joints, which effectively reduces the switch cost and temperature rise, improves dynamic and thermal stability, electrical life and mechanical life, and improves product performance in an all-round way.

2. The production and installation process is simple, which simplifies the processing and installation of parts. The parts are highly manufacturable, which greatly reduces the production time and improves the production efficiency.

Description of drawings

The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

Fig. 1 is the three-dimensional view of structure reduction of the present invention;

Fig. 2 is a three-dimensional view of the static contact holder 1 in Fig. 1;

Fig. 3 is a three-dimensional view of the static contact 2 in Fig. 1;

Fig. 4 is a three-dimensional view of the connection between the static contact holder 1 and the static contact 2;

Fig. 5 is a three-dimensional view of the moving contact 4 in Fig. 1;

Fig. 6 is a three-dimensional view of the moving contact holder 7 in Fig. 1;

Fig. 7 is a three-dimensional view of the connection between the movable contact 4 and the movable contact holder 7;

Figure 8 is a three-dimensional view of the tripping system 8;

In the figure: 1. Static contact holder; 2. Static contact; 3. Clamping device; 4. Moving contact; 5. First shaft; 6. Rotating shaft; 7. Moving contact holder; 8 .tripping system; 9. thermal element; 10. first hole; 11. second hole; 12. third hole; 13. fourth hole; 14. fifth hole; 15. second shaft; 16. sixth hole.

Detailed ways

See Fig. 1, the conductive circuit structure of the low-voltage circuit breaker includes the static contact 2, the moving contact 4, the rotating shaft 6, the tripping system 8 and the thermal element 9 on the tripping system 8. The static contact 2 and the movable contact 4 are in contact at the position of the rotating shaft 6 . Wherein, the static contact 2 is connected to the static contact holder 1 .

As shown in Figure 2-4, the static contact holder 1 is made of non-ferromagnetic material and consists of three continuous parts. The left part is a square structure with a hole, through which the incoming busbar and the static contact are clamped with screws. The holders 1 are connected together, the right part is a double-piece clamping structure supported relative to the middle part, the static contact 2 is rotatably arranged between the double-piece clamping structures, and the first hole 10 is set on the double-piece clamping structure , the first hole 10 and the second hole 11 on the static contact 2 are connected through the first shaft 5, and the static contact 2 can freely rotate around the first shaft 5 while ensuring a reliable connection. The middle part of the static contact holder 1 is lower than the left and right parts. A clamping device 3 is provided at the position of the double-piece clamping structure of the static contact 2 and at the lower part of the first shaft 5 , and the clamping device 3 is used for clamping the static contact holder 1 and the static contact 2 .

As shown in Figure 7, the movable contact 4 is connected to the movable contact holder 7, as shown in Figure 6, the movable contact holder 7 is composed of two parts, the left part is a round head double-piece clamping structure, and is equipped with The fourth hole 13, the movable contact 4 is located between the two-piece clamping structure, the movable contact 4 has a third hole 12, as shown in Figure 5-7, the third hole 12 on the movable contact 4 and The fourth hole 13 on the movable contact holder 7 passes through the second shaft 15, the two are connected by the second shaft 15, and the movable contact 4 can rotate freely, and the movable contact 4, the movable contact The clamping member 7 and the rotating shaft 6 form a rotating shaft assembly.

As shown in FIG. 6 , the right half of the moving contact holder 7 is a square structure, and a fifth hole 14 is opened on the square structure. As shown in Figure 8, the thermal element 9 is connected to the tripping system 8, the thermal element 9 is provided with a sixth hole 16, and the fifth hole 14 matches the sixth hole 16 and is fastened with screws. The tripping system 8 is a structure without solder joints, and the difference from the traditional structure is that the thermal element 9 and the outlet end of the tripping system 8 are a whole section of conductor structure, which has less welding structure than the traditional structure.

The static contact holder 1 of the present invention adopts the way of entering the line from the bottom, and is connected with the static contact 2 through the first shaft 5, and the movable contact 4 and the movable contact holder 7 are connected through the second shaft 15, and the dynamic The rear part of the contact holder 7 is connected to the release system 8 through screws, and the thermal element 9 is connected to the outlet bar of the release system 8 as a whole, so there is no soft connection and welding in the entire conductive circuit.

Claims (4)

1. A conductive circuit structure of a low-voltage circuit breaker, comprising a static contact (2), a moving contact (4), a rotating shaft (6), a tripping system (8) and a thermal element connected to the tripping system ( 9), it is characterized in that: the static contact (2) is connected to the static contact holder (1), the static contact holder (1) is composed of three consecutive parts, and the left part is divided into a hole with a connection to the busbar The square structure, the right part is a double-piece clamping structure supported relative to the middle part, and the static contact (2) is rotatably arranged between the double-piece clamping structures; the static contact holder (1) The middle part is lower than the left and right parts; the moving contact (4) is connected with the moving contact holder (7), and the moving contact holder (7) is composed of the left and right parts, and the left part is clamped by a round head and two pieces structure, the moving contact (4) is rotatably arranged between the round head double-piece clamping structure, and the square structure on the right part connects the thermal element (9), the outgoing line of the thermal element (9) and the tripping system (8) The end is the overall structure. 2. The conductive circuit structure of the low-voltage circuit breaker according to claim 1, characterized in that: the moving contact (4) and the moving contact holder (7) are connected through the second shaft (15). 3. The conductive circuit structure of the low-voltage circuit breaker according to claim 1, characterized in that: the static contact holder (1) and the static contact (2) are connected through the first shaft (5). 4. The conductive circuit structure of the low-voltage circuit breaker according to claim 3, characterized in that: a clamping device is provided at the position of the double-piece clamping structure of the static contact (2) and at the lower part of the first shaft (5) (3).

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