Adjustable overtravel switch

Abstract

The utility model discloses an adjustable overtravel switch, which comprises an insulating shell, an arc extinguish chamber, a copper nut, a static knife holder and a fastener, the arc extinguish chamber is arranged in the insulating shell, the bottom of the arc extinguish chamber is provided with a screw hole, the copper nut is in threaded connection in the screw hole, one end of the copper nut is abutted against the bottom of the arc extinguish chamber, and the other end of the copper nut is abutted against the static knife holder. The static knife holder is arranged at the other end of the copper nut and is connected with the arc extinguish chamber through a fastener; an adjustable structure exposed outside is arranged at the position, corresponding to the position between the insulating shell and the static knife holder, of the copper nut, and the adjustable structure is operated to drive the copper nut to rotate. According to the utility model, the overtravel is very convenient to adjust, and the structure does not influence the temperature rise and is more reliable.

Description

TECHNICAL FIELD

[0001] The utility model relates to switch technical field, especially a kind of adjustable overtravel switch. BACKGROUND

[0002] The overtravel adjustment of circuit breaker refers to the distance that dynamic or static contact can move after the complete closure of circuit breaker contact, to ensure the stability of contact pressure and closing and opening speed. The purpose of overtravel is to ensure contact pressure, thereby reducing contact resistance and ensuring the reliable operation of circuit breaker.

[0003] At present, in the existing circuit breaker, arc-extinguishing chamber is arranged in insulating shell, and copper nut is threadedly connected to the bottom end of insulating shell, and the upper end of copper nut is fixedly connected with arc-extinguishing chamber, and static knife head is arranged at the lower end of copper nut and connected with arc-extinguishing chamber by screw, wherein, the lower end of copper nut is provided with internal hexagonal groove, when overtravel needs to be adjusted, static knife head is first disassembled, then copper nut is operated by hexagonal wrench, copper nut rotates to drive arc-extinguishing chamber to rise and fall, to realize the adjustment of overtravel. However, in actual operation, due to the close structure of circuit breaker, some structures also have certain interference, it is difficult to disassemble static knife head alone for rotating operation of copper nut, generally, the entire circuit breaker needs to be disassembled, and then overtravel is adjusted alone, which is very troublesome. In addition, since the internal hexagonal groove is arranged on the copper nut, the current-carrying surface of this part is reduced, which affects the temperature rise. SUMMARY

[0004] The utility model aims at providing a kind of adjustable overtravel switch, the utility model not only adjusts overtravel very conveniently, and the structure does not affect temperature rise, structure is more reliable.

[0005] To achieve the above object, the utility model provides the following technical scheme: adjustable overtravel switch, including insulating shell, arc-extinguishing chamber, copper nut, static knife seat and fastener, the arc-extinguishing chamber is arranged in insulating shell, the bottom of arc-extinguishing chamber is provided with screw hole, the copper nut is threadedly connected in screw hole, and one end of copper nut is in abutment with the bottom of arc-extinguishing chamber, the static knife seat is arranged at the other end of copper nut and connected with arc-extinguishing chamber by fastener;The position corresponding between insulating shell and static knife seat is provided with the adjustable structure exposed outside on the copper nut, the adjustable structure is driven to rotate the copper nut by operation.

[0006] By adopting the above technical scheme, an adjustable structure exposed outside is arranged on the copper nut, when overtravel of circuit breaker needs to be adjusted, only need to loosen fastener first, then manually adjust the adjustable structure, to make copper nut rotate, copper nut rotates and moves axially up and down relative to insulating shell, to drive arc-extinguishing chamber to move up and down, to realize the adjustment of overtravel of circuit breaker, after adjustment, fastener is tightened again, which is simple and reliable in structure, and very convenient to operate.

[0007] The utility model further sets up, the adjustable structure includes the adjusting ring, the adjusting ring presents the periphery of the copper nut is set in the periphery and the outer contour of adjusting ring is noncircular shape.

[0008] Through adopting above-mentioned technical scheme, can adopt spanner and so on tool operation adjusting ring rotation, thereby realize the rotation of copper nut, operation is very simple and convenient.

[0009] The utility model further sets up, the periphery of copper nut is provided with at least one limit flat groove, the adjusting ring is set in the periphery of copper nut, and the inner contour shape of adjusting ring is equivalent with the outer contour shape of copper nut.

[0010] Through adopting above-mentioned technical scheme, it can realize the linkage of adjusting ring and copper nut, not only simple structure, convenient processing, but also beneficial to assembly, and the copper nut structure relative to the structure that six hexagonal recesses are set in the middle in prior art, current-carrying surface is larger, does not affect temperature rise.

[0011] The utility model further sets up, the outer contour of adjusting ring is regular polygon shape.

[0012] Through adopting above-mentioned technical scheme, the force of spanner is more uniform, and it is more beneficial to the cooperation of spanner and adjusting ring, and the rotation operation of adjusting ring is carried out.

[0013] The utility model further sets up, the static cutter seat is equipped with the avoidance groove for the adjusting ring of falling in near the one side of insulating shell.

[0014] Through adopting above-mentioned technical scheme, not only can the volume occupied by the assembly of two be reduced, but also the assembly is more beneficial, and the assembly can be improved in the original structure, without adjusting the size in a large range, and the adaptability is better.

[0015] The utility model further sets up, the fastener is internal hexagonal screw, and the static cutter seat is equipped with the accommodation groove for the screw head of fastener of falling in far from the one side of insulating shell.

[0016] Through adopting above-mentioned technical scheme, not only can the assembly volume be reduced, but also the screw head can be prevented from protruding the static cutter seat to interfere with other parts, and the appearance of the structure can be improved. DRAWINGS

[0017] Figure 1 It is the overall structural schematic diagram of the utility model;

[0018] Figure 2 It is the partial explosion drawing of the utility model;

[0019] Figure 3 It is the overall sectional view of the utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the copper nut of this utility model;

[0021] Figure 5 This is a schematic diagram of the structure of the adjusting ring of this utility model.

[0022] In the diagram: 1. Insulating shell; 2. Arc extinguishing chamber; 3. Copper nut; 4. Stationary knife holder; 5. Fastener; 6. Screw hole; 7. Adjusting ring; 8. Limiting flat groove; 9. Clearance groove; 10. Relief groove; 11. Wrench. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Example: As attached Figures 1-5 The adjustable overtravel switch shown includes an insulating housing 1, an arc-extinguishing chamber 2, a copper nut 3, a stationary knife seat 4, and fasteners 5. The arc-extinguishing chamber 2 is disposed inside the insulating housing 1, and a screw hole 6 is provided at the bottom of the arc-extinguishing chamber 2. The copper nut 3 is threaded into the screw hole 6, that is, the outer circumference of the copper nut 3 has an external thread that matches the internal thread of the screw hole 6, and one end of the copper nut 3 abuts against the bottom of the arc-extinguishing chamber 2. The stationary knife seat 4 is disposed at the other end of the copper nut 3 and is connected to the arc-extinguishing chamber 2 through the fasteners 5. The copper nut 3 has an adjustable structure exposed to the outside at a position corresponding to the position between the insulating housing 1 and the stationary knife seat 4. The copper nut 3 is rotated by operating the adjustable structure. An adjustable structure is provided on the copper nut 3, which is exposed to the outside. When it is necessary to adjust the overtravel of the circuit breaker, simply loosen the fastener 5 first, and then manually adjust the adjustable structure to make the copper nut 3 rotate. When the copper nut 3 rotates, it will move axially up and down relative to the insulating shell 1, thereby driving the arc-extinguishing chamber 2 to move up and down, thus realizing the adjustment of the overtravel of the circuit breaker. After the adjustment is completed, tighten the fastener 5 again. Its structure is simple and reliable, and the operation is very convenient.

[0025] As attached Figures 3-5 As shown, the adjustable structure includes an adjusting ring 7, which is circumferentially linked to the outer periphery of the copper nut 3, and the outer contour of the adjusting ring 7 is non-circular. The adjusting ring 7 can be rotated using a tool such as a wrench 11, thereby rotating the copper nut 3; the operation is very simple and convenient.

[0026] The adjusting ring 7 can be made of high-strength plastic or sheet metal.

[0027] As shown in the accompanying drawings Figures 3-5 The outer periphery of the copper nut 3 is provided with at least one limiting flat groove 8, the adjusting ring 7 is sleeved on the outer periphery of the copper nut 3, and the inner contour shape of the adjusting ring 7 is equivalent to the outer contour shape of the copper nut 3. More specifically, in this embodiment, two limiting flat grooves 8 are used, and the two limiting flat grooves 8 are distributed on both sides of the adjusting ring 7 at 180°. In addition, a limiting step can be provided on the outer periphery of the copper nut 3 to limit the upward stroke of the adjusting sleeve. It can realize the linkage of the adjusting ring 7 and the copper nut 3, which is not only simple in structure, convenient in processing, but also beneficial to assembly. Moreover, the structure of the copper nut 3 is larger than the existing structure with a hexagonal recess in the middle, and does not affect the temperature rise.

[0028] As shown in the accompanying drawings Figure 5 The outer contour of the adjusting ring 7 is a regular polygon shape. In this embodiment, the outer contour of the adjusting ring 7 is a regular hexagon shape. In addition to the regular hexagon shape, shapes such as regular quadrilateral or regular octagon can also be used. The adjusting ring 7 of this structure makes the force on the wrench 11 more uniform, which is more beneficial to the cooperation between the wrench 11 and the adjusting ring 7. The wrench 11 can be a hexagonal wrench 11.

[0029] As shown in the accompanying drawings Figure 3 The static blade seat 4 is provided with an avoiding groove 9 on the side close to the insulating shell 1 for the adjusting ring 7 to fall into. The depth of the avoiding groove 9 is equivalent to that of the adjusting ring 7. This design not only reduces the volume occupied by the assembly of the two, but also is beneficial to assembly. Moreover, the original structure can be improved for assembly without large-scale size adjustment, which is better in adaptability.

[0030] As shown in the accompanying drawings Figure 3 The fastener 5 is an internal hexagonal screw. The screw rod of the internal hexagonal screw is screwed through the circular hole in the center of the copper nut 3 and is screwed into the threaded groove provided at the bottom end of the arc extinguishing chamber 2. The side of the static blade seat 4 away from the insulating shell 1 is provided with a slot 10 for the screw head of the fastener 5 to fall into. This design not only reduces the assembly volume and avoids the interference of the screw head of the static blade seat 4 with other parts, but also improves the aesthetics of the structure.

Claims

1. An adjustable overtravel switch, comprising an insulating housing (1), an arc-extinguishing chamber (2), a copper nut (3), a stationary knife seat (4), and fasteners (5), wherein the arc-extinguishing chamber (2) is disposed within the insulating housing (1), a screw hole (6) is provided at the bottom of the arc-extinguishing chamber (2), the copper nut (3) is threaded into the screw hole (6), and one end of the copper nut (3) abuts against the bottom of the arc-extinguishing chamber (2), and the stationary knife seat (4) is disposed at the other end of the copper nut (3) and connected to the arc-extinguishing chamber (2) via the fasteners (5); characterized in that: The copper nut (3) has an adjustable structure exposed to the outside at the position between the insulating shell (1) and the stationary knife seat (4). The copper nut (3) is rotated by operating the adjustable structure.

2. The adjustable overtravel switch according to claim 1, characterized in that: The adjustable structure includes an adjustment ring (7), which is circumferentially linked to the outer periphery of the copper nut (3), and the outer contour of the adjustment ring (7) is non-circular.

3. The adjustable overtravel switch according to claim 2, characterized in that: The outer periphery of the copper nut (3) is provided with at least one limiting flat groove (8), the adjusting ring (7) is sleeved on the outer periphery of the copper nut (3), and the inner contour shape of the adjusting ring (7) is equivalent to the outer contour shape of the copper nut (3).

4. The adjustable overtravel switch according to claim 2, characterized in that: The outer contour of the adjustment ring (7) is a regular polygon shape.

5. The adjustable overtravel switch according to claim 2, characterized in that: The stationary knife holder (4) has a clearance groove (9) on the side near the insulating shell (1) for the adjustment ring (7) to fall into.

6. The adjustable overtravel switch according to claim 1, characterized in that: The fastener (5) is an internal hex screw, and the stationary knife holder (4) has a relief groove (10) on the side away from the insulating shell (1) for the screw head of the fastener (5) to fall into.

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