Anti-rebound device of circuit breaker mechanism

Abstract

The utility model provides an anti-springback device of a circuit breaker mechanism. The anti-springback device comprises a left cantilever assembly, a left swing rod assembly, a limiting shaft, a right swing rod assembly, a right cantilever assembly, a pin shaft and a spring, the left cantilever assembly and the right cantilever assembly are symmetrically installed on the rotating shaft and coaxially rotate with the rotating shaft. The left swing rod assembly is rotationally connected to the left cantilever assembly, and a spring is arranged at the rotating connection position. The right swing rod assembly is rotationally connected to the right cantilever assembly, and a spring is arranged at the rotating connection position. The left cantilever assembly and the right cantilever assembly are each provided with a first limiting arc face. The left swing rod assembly and the right swing rod assembly are each provided with a second limiting arc face. The limiting shaft is mounted on the operating mechanism; the limiting cambered surface I and the limiting cambered surface II correspond to the limiting shaft; the tool provided by the utility model is simple in structure and convenient and fast to use, and prevents the moving contact from rebounding and resetting by using gravity.

Description

Technical Field

[0001] This utility model belongs to the field of circuit breaker technology, specifically relating to a circuit breaker mechanism anti-rebound device. Background Technology

[0002] In low-voltage power distribution lines, circuit breakers distribute electrical energy and protect lines and power equipment from overload, short circuits, and other faults. With the strong promotion of new energy sources such as wind power and photovoltaics, the requirements for circuit breakers in their distribution lines are becoming increasingly stringent, demanding higher voltage, higher breaking capacity, and higher short-term withstand capability. Ordinary circuit breakers below 1000V can no longer meet these requirements. One major drawback limiting the breaking performance of circuit breakers is the rebound of the moving contact during the breaking process. During circuit breaker breaking, the operating mechanism is subjected to significant force impact. Since the operating mechanism is often composed of rigid parts, the impact causes the moving contact to rebound, typically exceeding half of the contact opening distance. This rebound can cause arc reignition when the circuit breaker breaks large currents, severely affecting its breaking performance and leading to damage to power distribution lines and equipment, as well as personal injury and property accidents.

[0003] The existing circuit breaker operating mechanism anti-rebound contact structure mostly relies on the locking of structural components. This structure requires a dedicated reset mechanism to unlock it, which is complex, cumbersome to assemble, and prone to causing the circuit breaker to fail to operate if the unlocking structure fails. Utility Model Content

[0004] To address the aforementioned problems, the purpose of this utility model is to provide a circuit breaker mechanism anti-rebound device that utilizes the gravity principle of the structural components themselves to prevent the moving contacts from rebounding and resetting.

[0005] This utility model is achieved through the following technical solution:

[0006] A circuit breaker mechanism anti-rebound device includes an operating mechanism, a rotating shaft, a cantilever, a connecting rod, and a contact mechanism; the operating mechanism is connected to the rotating shaft and provides power for the rotation of the rotating shaft; the cantilever is fixedly mounted on the rotating shaft; one end of the connecting rod is connected to the cantilever, and the other end is connected to the contact mechanism; characterized in that it further includes: a left cantilever assembly, a left swing arm assembly, a limiting shaft, a right swing arm assembly, a right cantilever assembly, a pin, a rotating shaft, a spring one, and a spring two; the left and right cantilever assemblies are symmetrically mounted on the rotating shaft and are connected to the rotating shaft. The rotating shaft rotates; the rotating shaft is respectively mounted on the left swing arm assembly and the right swing arm assembly; the left swing arm assembly is rotatably connected to the left cantilever assembly via the rotating shaft; the pin is respectively mounted on the left swing arm assembly and the right swing arm assembly; a spring is sleeved on the rotating shaft; the right swing arm assembly is rotatably connected to the right cantilever assembly via the rotating shaft; a second spring is sleeved on the rotating shaft; both the left and right cantilever assemblies are provided with a first limiting arc surface; both the left and right swing arm assemblies are provided with a second limiting arc surface; the limiting... The positioning axis is mounted on the operating mechanism; the first and second limiting arc surfaces correspond to the limiting axis; the left and right swing arm assemblies have the same structure and are both provided with shaft holes at their ends; the left swing arm assembly is rotatably connected to the left cantilever assembly via a rotating shaft passing through the shaft hole; the right swing arm assembly is rotatably connected to the right cantilever assembly via a rotating shaft passing through the shaft hole; it also includes a limiting oblong hole; the left and right cantilever assemblies have the same structure and are both provided with limiting oblong holes; there are two pins, one of which is mounted on one end... One end of the spring is mounted on the left swing arm assembly, and the other end is fitted into the limiting waist-shaped hole on the left cantilever assembly. Similarly, one end of the other pin is mounted on the right swing arm assembly, and the other end is fitted into the limiting waist-shaped hole on the right cantilever assembly. The left cantilever assembly, left swing arm assembly, right swing arm assembly, and right cantilever assembly are all sheet-like parts. The first spring and the second spring are both torsion springs. One end of the first spring rests on the pivot shaft, and the other end rests on the pin of the left swing arm assembly. One end of the second spring rests on the pivot shaft of the right swing arm assembly, and the other end rests on the pin of the right swing arm assembly.

[0007] The beneficial effects of this utility model are:

[0008] This utility model tooling has a simple structure and is convenient and quick to use. It uses gravity to achieve the anti-springback and reset of the moving contact. Attached Figure Description

[0009] The present invention will now be described in further detail with reference to the accompanying drawings.

[0010] Figure 1 This is a schematic diagram of the structure of this utility model.

[0011] Figure 2 This is a partial schematic diagram of the present invention.

[0012] Figure 3 This is a structural schematic diagram of the right cantilever assembly described in this utility model.

[0013] Figure 4 This is a structural schematic diagram of the combination of the right swing arm assembly and the right cantilever assembly described in this utility model.

[0014] Figure 5 This is a schematic diagram of the right swing arm assembly described in this utility model.

[0015] Figure 6 This is a structural schematic diagram of the circuit breaker segmentation process of this utility model.

[0016] Figure 7 This is a schematic diagram of the anti-rebound structure in this utility model.

[0017] Figure 8 This is a schematic diagram of the segmented structure of this utility model.

[0018] As shown in the figure: 1-operating mechanism; 2-rotating shaft; 3-cantilever; 4-connecting rod; 5-left cantilever assembly; 6-left swing arm assembly; 7-limiting shaft; 8-right swing arm assembly; 9-right cantilever assembly; 10-pin; 11-rotating shaft; 11A-spring one; 11B-spring two; 101-limiting waist-shaped hole; 102-limiting arc surface one; 103-limiting arc surface two; 104-shaft hole. Detailed Implementation

[0019] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0020] It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding. They are not intended to limit the scope of this invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, provided they do not affect the effectiveness or purpose of this invention, should still fall within the scope of the technical content disclosed herein. Furthermore, terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0021] In the description of this utility model, it should be noted that, unless otherwise expressly specified and limited, the terms "connected" or "linked" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a mechanical connection or an electrical connection; it can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. It should be noted that the terms "comprising," "including," or any other variations are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0022] like Figures 1-5 The circuit breaker mechanism anti-rebound device shown includes: an operating mechanism 1, a rotating shaft 2, a cantilever 3, a connecting rod 4, a left cantilever assembly 5, a left swing arm assembly 6, a limiting shaft 7, a right swing arm assembly 8, a right cantilever assembly 9, a pin 10, a rotating shaft 11, a spring 11A, a spring 11B, a limiting oblong hole 101, a limiting arc surface 102, a limiting arc surface 2 103, and a shaft hole 104.

[0023] The operating mechanism 1 is connected to the rotating shaft 2 and provides power for the rotation of the rotating shaft 2; the cantilever 3 is mounted on the rotating shaft 2; one end of the connecting rod 4 is connected to the cantilever 3, and the other end is connected to the contact mechanism.

[0024] The left cantilever assembly 5 and the right cantilever assembly 9 are symmetrically mounted on the rotating shaft 2 and rotate coaxially with the rotating shaft 2; the rotating shaft 11 is respectively mounted on the left swing arm assembly 6 and the right swing arm assembly 8; the left swing arm assembly 6 is rotatably connected to the left cantilever assembly 5 through the rotating shaft 11; the pin shaft 10 is respectively mounted on the left swing arm assembly 6 and the right swing arm assembly 8; the first spring 11A is sleeved on the rotating shaft 11; the right swing arm assembly 8 is rotatably connected to the right cantilever assembly 9 through the rotating shaft 11; the second spring 11B is sleeved on the rotating shaft 11; both the left cantilever assembly 5 and the right cantilever assembly 9 are provided with a limiting arc surface 102; both the left swing arm assembly 6 and the right swing arm assembly 8 are provided with a limiting arc surface 103; the limiting shaft 7 is mounted on the operating mechanism 1; the first limiting arc surface 102 and the second limiting arc surface 103 correspond to the limiting shaft 7.

[0025] The left swing arm assembly 6 and the right swing arm assembly 8 have the same structure, and both of them are provided with shaft holes 104 at their ends. The left swing arm assembly 6 is rotatably connected to the left cantilever assembly 5 through a rotating shaft 11 passing through the shaft hole 104; the right swing arm assembly 8 is rotatably connected to the right cantilever assembly 9 through a rotating shaft 11 passing through the shaft hole 104.

[0026] To limit the movement trajectory of the left swing arm assembly 6 and the right swing arm assembly 8, the left cantilever assembly 5 and the right cantilever assembly 9 have the same structure, and both are provided with a limiting waist-shaped hole 101; there are two pins 10, one of which is installed on the left swing arm assembly 6 at one end and sleeved in the limiting waist-shaped hole 101 on the left cantilever assembly 5 at the other end, and similarly, one end of the other pin is installed on the right swing arm assembly 8 and sleeved in the limiting waist-shaped hole 101 on the right cantilever assembly 9 at the other end.

[0027] The left cantilever assembly 5, the left swing arm assembly 6, the right swing arm assembly 8, and the right cantilever assembly 9 are all sheet-like parts.

[0028] Both spring 11A and spring 11B are torsion springs; one end of spring 11A rests on the pivot 2, and the other end rests on the pin 10 of the left swing arm assembly 6; one end of spring 11B rests on the pivot 2 of the right swing arm assembly 8, and the other end rests on the pin 10 of the right swing arm assembly 8, providing a restoring force for the left swing arm assembly 6 and the right swing arm assembly 8.

[0029] Work steps:

[0030] like Figure 6 As shown, before the circuit breaker's operating mechanism 1 disconnects, the left swing arm assembly 6 and the right swing arm assembly 8 are under the action of the spring 11. At this time, the pins 10 on the left swing arm assembly 6 and the right swing arm assembly 8 are inside the upper end of the limiting oblong hole 101, and the left swing arm assembly 6 and the right swing arm assembly 8 remain stationary. After the operating mechanism 1 begins to disconnect, the rotating shaft 2 begins to rotate in the direction shown in the figure, driving the cantilever 3, connecting rod 4, left cantilever assembly 5, left swing arm assembly 6, limiting shaft 7, right swing arm assembly 8, and right cantilever assembly 9 to rotate together. Figure 7 As shown, when the limiting arc surface 102 on the left cantilever assembly 5 and the right cantilever assembly 9 rotates to contact the limiting shaft 7 on the operating mechanism 1, it cannot continue to rotate in the direction of rotation due to the restriction of the limiting shaft 7. At this time, the left rocker arm assembly 6 and the right rocker arm assembly 8, due to gravity and inertia, overcome the elastic force of the spring 11 and continue to rotate in the direction of rotation along the shaft hole 104 until the pin 10 reaches the lower end of the limiting waist-shaped hole 101. At this time, the limiting arc surface 103 on the left rocker arm assembly 6 and the right rocker arm assembly 8 contacts the limiting shaft 7 and engages to lock it. At this time, the operating mechanism 1 is impacted, which will cause the rotating shaft 2 to spring back. However, because the limiting arc surface 103 engages with the limiting shaft 7, it prevents the rotating shaft 2 from springing back, thus preventing the moving contact from springing back when the mechanism breaks. Finally, as shown... Figure 8 As shown, when the circuit breaker disconnects, the left swing arm assembly 6 and the right swing arm assembly 8 are respectively acted upon by spring 11A and spring 21B, and reset to their initial positions, that is, the pin 10 is at the upper end of the limiting waist-shaped hole 101, thus completing the entire reset process.

[0031] The scope of protection of this utility model is not limited to the technical solutions disclosed in the specific embodiments. Any modifications, equivalent substitutions, improvements, etc., made to the above embodiments based on the technical essence of this utility model shall fall within the scope of protection of this utility model.

Claims

1. A circuit breaker mechanism anti-rebound device, comprising an operating mechanism (1), a rotating shaft (2), a cantilever (3), a connecting rod (4), and a contact mechanism; the operating mechanism (1) is connected to the rotating shaft (2) and provides power for the rotation of the rotating shaft (2); the cantilever (3) is fixedly mounted on the rotating shaft (2); one end of the connecting rod (4) is connected to the cantilever (3), and the other end is connected to the contact mechanism; characterized in that It also includes: a left cantilever assembly (5), a left swing arm assembly (6), a limiting shaft (7), a right swing arm assembly (8), a right cantilever assembly (9), a pin (10), a rotating shaft (11), a spring one (11A), and a spring two (11B); the left cantilever assembly (5) and the right cantilever assembly (9) are symmetrically mounted on the rotating shaft (2) and rotate coaxially with the rotating shaft (2); the rotating shaft (11) is respectively mounted on the left swing arm assembly (6) and the right swing arm assembly (8); the left swing arm assembly (6) is rotatably connected to the left cantilever assembly (5) through the rotating shaft (11); the pin (10) is respectively mounted on the left swing arm assembly (6). The spring 1 (11A) is sleeved on the rotating shaft (11); the right swing arm assembly (8) is rotatably connected to the right cantilever assembly (9) via the rotating shaft (11); the spring 2 (11B) is sleeved on the rotating shaft (11); the left cantilever assembly (5) and the right cantilever assembly (9) are each provided with a limiting arc surface 1 (102); the left swing arm assembly (6) and the right swing arm assembly (8) are each provided with a limiting arc surface 2 (103); the limiting shaft (7) is installed on the operating mechanism (1); the limiting arc surface 1 (102) and the limiting arc surface 2 (103) correspond to the limiting shaft (7).

2. The anti-rebound device for a circuit breaker mechanism according to claim 1, characterized in that... The left swing arm assembly (6) and the right swing arm assembly (8) have the same structure and are provided with shaft holes (104) at their ends. The left swing arm assembly (6) is rotatably connected to the left cantilever assembly (5) through a rotating shaft (11) passing through the shaft hole (104); the right swing arm assembly (8) is rotatably connected to the right cantilever assembly (9) through a rotating shaft (11) passing through the shaft hole (104).

3. The anti-rebound device for a circuit breaker mechanism according to claim 1, characterized in that... It also includes a limiting waist-shaped hole (101); the left cantilever assembly (5) and the right cantilever assembly (9) have the same structure, and they are both provided with limiting waist-shaped holes (101); there are two pins (10), one of which is installed on the left swing arm assembly (6) at one end and sleeved in the limiting waist-shaped hole (101) on the left cantilever assembly (5) at the other end. Similarly, one end of the other pin (10) is installed on the right swing arm assembly (8) at one end and sleeved in the limiting waist-shaped hole (101) on the right cantilever assembly (9) at the other end.

4. The anti-rebound device for a circuit breaker mechanism according to claim 1, characterized in that... The left cantilever assembly (5), left swing arm assembly (6), right swing arm assembly (8) and right cantilever assembly (9) are all sheet-like parts.

5. A circuit breaker mechanism anti-rebound device according to claim 1, characterized in that... The first spring (11A) and the second spring (11B) are both torsion springs; one end of the first spring (11A) rests on the rotating shaft (2) and the other end rests on the pin (10) of the left swing arm assembly (6); one end of the second spring (11B) rests on the rotating shaft (2) of the right swing arm assembly (8) and the other end rests on the pin (10) of the right swing arm assembly (8).

Images