Contact fixing structure of circuit breaker

Abstract

The utility model relates to a contact fixing structure of a circuit breaker. The contact fixing structure comprises a first base groove and a second base groove which are in butt joint with each other to form an installation cavity. Wherein a pair of opposite side walls of the first base groove and the second base groove are respectively provided with a contact plug-in groove, two sides of the contact are respectively provided with a plug-in matching groove, and the contact plug-in groove and the plug-in matching groove are orthogonally arranged and mutually plugged so as to fix the contact between the first base groove and the second base groove; and clamping pieces are arranged at the bottoms of the first base groove and the second base groove and are used for clamping the tail end, located in the mounting cavity, of the contact. Compared with the prior art, the installation structure is simple, and warehouse storage, after-sales maintenance and overhaul are facilitated.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of circuit breaker, and relates to a contact fixing structure of circuit breaker. BACKGROUND

[0002] Low-voltage frame circuit breakers are critical protection devices in power systems. Their main functions are to switch on and off the current when the circuit is operating normally, and to automatically disconnect the circuit in abnormal conditions to protect the circuit and equipment from damage. These circuit breakers can automatically disconnect the circuit in the event of short circuits, overloads, or under-voltage faults, ensuring the reliability of power supply and the safety of equipment.

[0003] However, existing low-voltage frame circuit breakers have some challenges in installation and maintenance. The installation process is relatively complex, involving multiple components, which not only increases the installation time and complexity, but also increases the risk of errors. In addition, due to the large number of components, the maintenance and repair of the frame circuit breaker also becomes complex. The problem of frequent maintenance work needs to improve the structural strength and effective service life of the device, and on the other hand, it needs to improve the assembly convenience between each component in the circuit breaker to reduce maintenance costs. SUMMARY

[0004] The purpose of the utility model is to provide a contact fixing structure for circuit breakers, which is convenient to assemble and disassemble and maintain.

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] A contact fixing structure of a circuit breaker for fixing a contact, the contact fixing structure comprising a first base slot and a second base slot that are mutually butted to form an installation cavity;

[0007] A contact insertion slot is formed on each of the pair of opposite side walls of the first base slot and the second base slot, and a plug-in matching slot is formed on each side of the contact, the contact insertion slot and the plug-in matching slot are orthogonal and are plugged into each other to fix the contact between the first base slot and the second base slot;

[0008] The first base slot and the second base slot are provided with a clamping piece at the bottom for clamping the tail end of the contact inside the installation cavity.

[0009] The utility model realizes orthogonal plug-in matching between the slot on the side wall of the first base slot and the second base slot and the plug-in matching slot of the contact side wall, limits the contact between the first base slot and the second base slot, avoids the contact from being pulled out or sliding in from the assembly position; at the same time, the clamping piece clamps the tail end of the contact to cooperate with the plug-in position, limits the posture of the contact, thereby realizing the fixation of the contact, having the effects of simple structure, stable contact fixation effect, etc.

[0010] Further, a through hole is formed on the first end of the contact outside the mounting cavity.

[0011] Further, the clamping piece comprises a clamping wall extending along a side wall of the contact insertion slot, and a clamping block arranged at the bottom side of the first base slot and the second base slot and opposite to the supporting wall.

[0012] The tail end of the contact is clamped between the clamping block and the clamping wall.

[0013] Further, an arc striking piece is connected to the tail end of the contact, and insertion blocks are arranged on both sides of the arc striking piece.

[0014] An insertion slot is formed in the inner wall bottom side of the first base slot and the second base slot, and the insertion blocks are inserted into the insertion slot.

[0015] Further, the arc striking piece comprises a horizontal connection section, an inclined section and a vertical extension section connected in sequence.

[0016] The insertion blocks are arranged on both sides of the vertical extension section.

[0017] The inclined section is supported on the clamping block.

[0018] Further, the clamping piece is a U-shaped slot at the bottom side of the first base slot and the second base slot, and the tail end of the contact is clamped in the U-shaped slot.

[0019] Further, the contact is a copper contact.

[0020] Further, on the side walls of the first base slot and the second base slot, a contact insertion slot is arranged above and below respectively, and a clamping block is arranged correspondingly.

[0021] Further, a sunken platform is arranged on the inner edge of the side wall of the first base slot, a convex rib is arranged on the inner edge of the side wall of the second base slot, and when the first base slot and the second base slot are butted, the convex rib is inserted into the sunken platform.

[0022] Further, a slot is arranged on the top surface of the side wall of the first base slot, and an insertion piece is arranged on the top side of the side wall of the second base slot; when the first base slot and the second base slot are butted, the insertion piece is inserted into the slot.

[0023] Compared with the prior art, the utility model has the following beneficial effects:

[0024] The utility model aims at designing a contact fixed structure of low voltage circuit breaker, the parts are tightly matched through the recess and the boss, thereby reducing the number of fastener and other components, the installation structure is simple, reduces the cost, and is convenient for warehouse storage, after-sales maintenance and overhauling. Secondly, under the direct current high voltage or alternating current high voltage, the few fasteners in the cavity can reduce the discharge effect and improve the arc extinguishing reliability. In addition, the copper bar is fixed on the base directly, the mounting structure of using angle iron or support on the copper bar is cancelled, and the cumulative error of assembly is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a structure schematic view of contact fixed structure of one circuit breaker in the embodiment;

[0026] Figure 2 It is the assembly schematic view of first base groove and contact and arc leading piece;

[0027] Figure 3 It is the structure schematic view of first base groove;

[0028] Figure 4 It is the structure schematic view of first contact;

[0029] Figure 5 It is the structure schematic view of second contact;

[0030] Mark explanation in drawing:

[0031] 1, first base groove, 1-1, U-shaped groove, 1-2, clamping block, 1-3, contact plug-in slot, 1-4, insertion groove, 2, second base groove, 3, first contact, 4, second contact, 5, arc leading piece. DETAILED DESCRIPTION

[0032] The utility model will be explained in detail below in combination with the drawings and specific embodiments. The following embodiments are implemented on the premise of the above technical scheme of the utility model, and detailed implementation mode and specific operation process are given, but the protection scope of the utility model is not limited to the following embodiments.

[0033] It should be noted that: similar signs and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0034] Some embodiments of the utility model will be explained in detail below in combination with the drawings. In the case of no conflict, the following embodiments and features in the embodiments can be combined with each other.

[0035] Embodiment:

[0036] As Figure 1The contact fixing structure of the circuit breaker shown is used for fixing the contact, and the contact fixing structure comprises a pair of contact fixing walls 1-1 and 1-2 which are opposite to each other and form a mounting cavity, and a pair of side walls 1-3 and 1-4 which are opposite to each other and are arranged on the bottom of the mounting cavity. Figure 2 The first base groove 1 and the second base groove 2 shown; a pair of opposite side walls of the first base groove 1 and the second base groove 2 are respectively provided with a contact plug-in groove 1-3 (such as Figure 3 The two sides of the contact are respectively provided with a plug-in matching groove (such as Figure 4 and Figure 5 The contact plug-in groove 1-3 and the plug-in matching groove are orthogonally arranged and plugged into each other to fix the contact between the first base groove 1 and the second base groove 2; the first base groove 1 and the second base groove 2 are provided with a clamping piece at the bottom, which is used for clamping the tail end of the contact in the mounting cavity.

[0037] In this embodiment, the contact is limited between the first base groove 1 and the second base groove 2 through the orthogonal plug-in matching between the slot on the side wall of the first base groove 1 and the second base groove 2 and the plug-in matching groove of the side wall of the contact, so as to avoid the contact from being pulled out or slipped in from the assembly; at the same time, the tail end of the contact is clamped by the clamping piece to cooperate with the plug-in part to limit the posture of the contact, so as to realize the fixation of the contact, and the structure is simple, the contact fixing effect is stable, and the like.

[0038] In some specific embodiments, a through hole is formed on the head end of the contact outside the mounting cavity.

[0039] In some specific embodiments, the clamping piece comprises a clamping wall extending along one side wall of the contact plug-in groove 1-3, and a clamping block 1-2 arranged on the bottom side of the first base groove 1 and the second base groove 2 and opposite to the supporting wall; the tail end of the contact is clamped between the clamping block 1-2 and the clamping wall.

[0040] In some specific embodiments, the tail end of the contact is connected with an arc leading piece 5, the two sides of the arc leading piece 5 are provided with plug-in blocks; the inner wall bottom side of the first base groove 1 and the second base groove 2 is provided with a plug-in groove 1-4, and the plug-in blocks are plugged into the plug-in groove 1-4. After the first base groove 1 and the second base groove 2 are connected, the contact and the arc leading piece 5 are fixed to prevent them from being displaced.

[0041] In some specific embodiments, the arc leading piece 5 comprises a horizontal connecting segment, an inclined segment and a vertical extending segment which are sequentially and flexibly connected; the plug-in blocks are arranged on the two side edges of the vertical extending segment; the inclined segment is supported on the clamping block 1-2.

[0042] In some specific embodiments, the clamping piece is a U-shaped groove 1-1 at the bottom side of the first base groove 1 and the second base groove 2, and the tail end of the contact is clamped in the U-shaped groove 1-1.

[0043] In some specific embodiments, the contact is a copper contact, specifically a copper bar.

[0044] In some specific embodiments, the side walls of the first base groove 1 and the second base groove 2 are respectively provided with a contact plug-in groove 1-3 and a clamping block in sequence, and are respectively provided with a first contact 3 and a second contact 4 for fixing; specifically, the inner side of the upper contact plug-in groove 1-3 is provided with a clamping wall and a clamping block 1-2 in parallel; the inner side of the lower contact plug-in groove 1-3 is provided with a U-shaped groove 1-1.

[0045] In some specific embodiments, the inner edges of the opposite side walls of the first base groove 1 are provided with sunken platforms, and the inner edges of the side walls of the second base groove 2 are provided with convex edges; when the first base groove 1 and the second base groove 2 are connected, the convex edges are inserted into the sunken platforms.

[0046] In some specific embodiments, the top surface of the side wall of the first base groove 1 is provided with a slot, and the top side of the side wall of the second base groove 2 is provided with an insertion piece; when the first base groove 1 and the second base groove 2 are connected, the insertion piece is inserted into the slot.

[0047] The above description of the embodiments is for the purpose of facilitating the understanding and use of the utility model by the ordinary skilled in the art. The skilled in the art can obviously make various modifications to the embodiments, and apply the general principles described herein to other embodiments without the need for creative labor. Therefore, the utility model is not limited to the above embodiments, and the improvements and modifications made by the skilled in the art according to the disclosure of the utility model without departing from the scope of the utility model should be within the protection scope of the utility model.

Claims

1. A contact fixing structure of a circuit breaker for fixing a contact, characterized by, The contact fixing structure comprises a first base groove (1) and a second base groove (2) which are in abutment with each other to form a mounting cavity; A contact insertion groove (1-3) is formed on each of the pair of opposite side walls of the first base groove (1) and the second base groove (2), and two insertion matching grooves are formed on the two sides of the contact, the contact insertion groove (1-3) and the insertion matching grooves are arranged orthogonally and are in insertion with each other, so as to fix the contact between the first base groove (1) and the second base groove (2); A clamping piece is arranged at the bottom of the first base groove (1) and the second base groove (2) to clamp the tail end of the contact in the mounting cavity.

2. The contact fixing structure of the circuit breaker according to claim 1, characterized by A through hole is formed on the head end of the contact outside the mounting cavity.

3. The contact fixing structure of the circuit breaker according to claim 1, characterized by The clamping piece comprises a clamping wall extending along one side wall of the contact insertion groove (1-3), and a clamping block (1-2) arranged at the bottom side of the first base groove (1) and the second base groove (2) and arranged opposite to the supporting wall; The tail end of the contact is clamped between the clamping block (1-2) and the clamping wall.

4. The contact fixing structure of the circuit breaker according to claim 3, characterized by An arc striking piece (5) is connected to the tail end of the contact, and insertion blocks are arranged on the two sides of the arc striking piece (5); An insertion groove is formed on the inner wall of the first base groove (1) and the second base groove (2), and the insertion blocks are inserted into the insertion groove.

5. The contact fixing structure of the circuit breaker according to claim 4, characterized by The arc striking piece (5) comprises a horizontal connection section, an inclined section and a vertical extension section which are connected in sequence; The insertion blocks are arranged on the two sides of the vertical extension section; The inclined section is supported on the clamping block (1-2).

6. The contact fixing structure of the circuit breaker according to claim 1, characterized by The clamping piece is a U-shaped groove (1-1) arranged at the bottom side of the first base groove (1) and the second base groove (2), and the tail end of the contact is clamped in the U-shaped groove (1-1).

7. The contact fixing structure of the circuit breaker according to claim 1, characterized by The contact is a copper contact.

8. The contact fixing structure of the circuit breaker according to claim 1, characterized by The side walls of the first base groove (1) and the second base groove (2) are provided with the contact insertion groove (1-3) above and below respectively, and the clamping blocks are arranged correspondingly.

9. The contact fixing structure of the circuit breaker according to claim 1, characterized by The inner edge of the side wall of the first base groove (1) is provided with a sunken platform, the inner edge of the side wall of the second base groove (2) is provided with a convex rib, and when the first base groove (1) and the second base groove (2) are in abutment, the convex rib is inserted into the sunken platform.

10. The contact fixing structure of the circuit breaker according to claim 1, characterized by The top surface of the side wall of the first base groove (1) is provided with a slot, and the top side of the side wall of the second base groove (2) is provided with an insertion piece; When the first base groove (1) and the second base groove (2) are in abutment, the insertion piece is inserted into the slot.

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