A tie rod drive mechanism for an outdoor circuit breaker

Abstract

A pull rod transmission mechanism for outdoor circuit breaker, comprising two symmetrically arranged driving square shafts, and forming a mounting space between the two; a plurality of crank arms arranged along the axis direction of the driving square shaft, the crank arm comprising two oppositely arranged crank arm connecting plates, and a gap is formed between the two for inserting an insulating pull rod; an insulating pull rod is arranged between the two crank arm connecting plates, and the three are fixedly connected by a pluggable pin shaft, and the bottom of the insulating pull rod is provided with an adjusting groove. By arranging two driving square shafts at the outermost side and forming an operating space between the two, the driving square shafts do not block the end of the insulating pull rod, and by arranging an adjusting groove for adjusting at the end of the insulating pull rod, when adjustment is needed, only the pluggable pin shaft needs to be pulled out, and then the adjusting tool can be used for adjustment. Compared with the previous scheme of disassembling the entire transmission mechanism, the adjustment is simple, the structure is simple, and a smaller size design can be realized.

Description

Technical Field

[0001] This utility model relates to the field of outdoor vacuum circuit breakers, specifically to a lever transmission mechanism for outdoor circuit breakers. Background Technology

[0002] High-voltage circuit breakers (or high-voltage switches) can not only cut off or close the no-load current and load current in high-voltage circuits, but also cut off overload current and short-circuit current through the action of relay protection devices when a system fault occurs. They have a fairly complete arc-extinguishing structure and sufficient breaking capacity, and can be divided into: oil circuit breakers (multi-oil circuit breakers, low-oil circuit breakers), sulfur hexafluoride circuit breakers (SF6 circuit breakers), compressed air circuit breakers, vacuum circuit breakers, etc.

[0003] As for outdoor circuit breakers, they generally use a permanent magnet mechanism to drive the pull rod. Conventionally, multiple permanent magnet mechanisms drive multiple vacuum poles. However, to reduce size, a single permanent magnet mechanism is used to drive multiple vacuum poles synchronously. Therefore, a transversely arranged transmission mechanism is required. This mechanism generally uses a drive square shaft and a crank arm. The crank arm is connected to the pull rod of the vacuum pole, and the transverse movement of the drive square shaft drives the crank arm to move, thus realizing the opening and closing action. However, as disclosed in Chinese patent CN117766350 B, a fast-breaking circuit breaker has its main shaft 1 (i.e., the drive square shaft) directly set between the crank arms 5. At the same time, one end of the insulating pull rod 6 is also set between the crank arms 5. This results in the main shaft blocking the insulating pull rod. When the insulating pull rod needs to be adjusted, the entire transmission mechanism needs to be disassembled, which is time-consuming and laborious. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a rod transmission mechanism for outdoor circuit breakers.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A lever drive mechanism for an outdoor circuit breaker, comprising: Two symmetrically arranged drive shafts, with an installation space between them; Several crank arms are arranged along the axis of the drive shaft. Each crank arm includes two opposing crank arm connecting plates, and a gap is formed between the crank arm connecting plates for inserting an insulating pull rod. An insulating pull rod is placed between two crank arm connecting plates, and the three are fixedly connected by a pluggable pin. The bottom of the insulating pull rod is provided with an adjustment groove.

[0006] A wheel is installed between the two crank arm connecting plates.

[0007] A buffer pad is provided in front of the motion path of the drive square shaft.

[0008] A gate spring assembly is provided on the outer side of the drive shaft.

[0009] The trip spring assembly includes a first mounting plate connected to the outdoor circuit breaker housing and a second mounting plate connected to the drive shaft, with a trip spring provided between the first mounting plate and the second mounting plate.

[0010] The second mounting plate is a double-hole mounting plate.

[0011] The drive shaft and the crank arm connecting plate are connected by a pin, and the two ends of the pin extend outward to form guide rods.

[0012] The adjustment groove is a straight groove.

[0013] The beneficial effects of this utility model are as follows: By setting two drive square shafts and placing them on the outermost side, an operating space is formed between the two, so that the drive square shafts will not block the end of the insulating pull rod. By setting an adjustment groove for adjustment at the end of the insulating pull rod, when adjustment is needed, it is only necessary to pull out the pluggable pin and adjust it with an adjustment tool. Compared with the previous solution that required disassembling the entire transmission mechanism, this application is simple to adjust, has a simple structure, and can achieve a smaller size design. Attached Figure Description Figure 1 This is a schematic diagram of the structure of the present invention applied to an outdoor circuit breaker.

[0014] Figure 2 This is a schematic diagram of the structure of this utility model.

[0015] Figure 3 This is a bottom view of the application of this utility model to an outdoor circuit breaker.

[0016] Figure 4 This is a front view of the present invention applied inside the housing of an outdoor circuit breaker.

[0017] Figure 5 This is a schematic diagram of the structure of this utility model applied inside the housing of an outdoor circuit breaker. Detailed Implementation

[0018] 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.

[0019] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0020] like Figure 1 , Figure 2 and Figure 3 As shown, this utility model discloses a lever transmission mechanism for an outdoor circuit breaker, which includes two symmetrically arranged drive shafts 100, a crank arm 200 disposed between the two drive shafts, and an insulating lever 400 disposed between the crank arms. The end of the insulating lever 400 is directly exposed due to the avoidance of the drive shafts and the crank arms, and can be directly operated. At the same time, there are at least four crank arms, three of which are connected to the vacuum pole through the insulating lever, and the other is linked to the permanent magnet mechanism. The permanent magnet mechanism drives the drive shafts to move to the left or right relative to achieve the opening and closing action.

[0021] Two symmetrically arranged drive shafts 100 form an installation space 110 between them.

[0022] Several crank arms 200 are arranged along the axis of the drive shaft 100. Each crank arm 200 includes two opposing crank arm connecting plates 210, and a gap is formed between the crank arm connecting plates 210 for inserting an insulating pull rod 400. At the same time, the two crank arm connecting plates 210 are connected by a wheel 220 to achieve uniformity of the gap width. The wheel is sleeved on the pin shaft, and its width is preferably the same as the diameter of the insulating pull rod.

[0023] An insulating pull rod 400 is placed between two crank arm connecting plates 210, and the three are fixedly connected by a pluggable pin 610. The bottom of the insulating pull rod 400 is provided with an adjustment groove 410. The design of the pluggable pin 600 allows it to be easily pulled out when adjustment is needed, thereby removing the restriction on the rotation direction of the insulating pull rod and directly realizing the adjustability of the insulating pull rod.

[0024] A buffer pad 600 is provided in front of the movement path of the drive square shaft 100. The buffer pad 600 is fixed to the inner wall of the outdoor circuit breaker housing and is located at the front end of the drive square shaft in the opening movement direction to prevent the drive square shaft from directly hitting the housing when opening.

[0025] The outer side of the drive shaft 100 is provided with a brake spring assembly 300. There are two sets of brake spring assemblies, which are symmetrically arranged on the outer side of the two drive shafts to provide brake opening assistance.

[0026] Among them, such as Figure 4As shown, the trip spring assembly 300 includes a first mounting plate 310 connected to the outdoor circuit breaker housing and a second mounting plate 330 connected to the drive square shaft 100. A trip spring 320 is provided between the first mounting plate 310 and the second mounting plate 330. The second mounting plate 330 is a double-hole mounting plate. By adjusting the position of the connecting holes of the double-hole mounting plate, different tripping forces of the trip spring can be achieved to meet the tripping requirements of different models of outdoor circuit breakers.

[0027] like Figure 5 As shown, the drive shaft 100 and the crank arm connecting plate 210 are connected by a pin 500, and the two ends of the pin 500 extend outward to form a guide rod. The guide rod is formed by directly extending the pin outward, which forms a guiding and supporting cooperation with the bracket of the outdoor circuit breaker housing, simplifying the structure.

[0028] The adjustment groove 410 is a straight groove, but other types of grooves can also be used.

[0029] The embodiments should not be regarded as limitations on the present invention, but any improvements made based on the spirit of the present invention should be within the protection scope of the present invention.

Claims

1. A pull rod transmission mechanism for an outdoor circuit breaker, characterized in that: It includes: Two symmetrically arranged drive shafts (100) form an installation space (110) between them. A plurality of crank arms (200) are arranged along the axis of the drive square shaft (100). Each crank arm (200) includes two opposing crank arm connecting plates (210), and a gap is formed between the crank arm connecting plates (210) for inserting an insulating pull rod (400). An insulating pull rod (400) is placed between two crank arm connecting plates (210), and the three are fixedly connected by a pluggable pin (610), and the bottom of the insulating pull rod (400) is provided with an adjustment groove (410).

2. The lever transmission mechanism for an outdoor circuit breaker according to claim 1, characterized in that: A wheel (220) is provided between the two crank arm connecting plates (210).

3. The lever transmission mechanism for an outdoor circuit breaker according to claim 1, characterized in that: A buffer pad (600) is provided in front of the movement path of the drive square shaft (100).

4. A pull rod transmission mechanism for an outdoor circuit breaker according to claim 1 or 3, characterized in that: The outer side of the drive shaft (100) is provided with a gate spring assembly (300).

5. A rod transmission mechanism for an outdoor circuit breaker according to claim 4, characterized in that: The trip spring assembly (300) includes a first mounting plate (310) connected to the outdoor circuit breaker housing and a second mounting plate (330) connected to the drive square shaft (100), with a trip spring (320) provided between the first mounting plate (310) and the second mounting plate (330).

6. A rod transmission mechanism for an outdoor circuit breaker according to claim 5, characterized in that: The second mounting plate (330) is a double-hole mounting plate.

7. A rod transmission mechanism for an outdoor circuit breaker according to claim 1, characterized in that: The drive shaft (100) is connected to the crank arm connecting plate (210) by a pin (500), and the two ends of the pin (500) extend outward to form guide rods.

8. A rod transmission mechanism for an outdoor circuit breaker according to claim 1, characterized in that: The adjustment groove (410) is a straight groove.

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