A counter structure for a frame circuit breaker

Abstract

The utility model relates to a kind of counter structure for frame circuit breaker, including base and the operating mechanism installed on it, operating mechanism includes dynamic main shaft;Base is installed with counter structure;Counter structure includes counter, support, elastic member and connecting rod assembly;Counter includes the dial lever for counting;Frame circuit breaker opens the state, dial lever is in reset state;Frame circuit breaker closes the state, main shaft rotates, and elastic member is stretched by the relative rotation between connecting rod assembly, dial lever is rotated, realizes once counting.By directly installing counter on base, and by connecting rod assembly connecting counter and existing operating mechanism, without changing the structure of existing operating mechanism to special customization, simple structure, part structure flattening, assembly is convenient, improve assembly efficiency, facilitate the storage of counter module material.In addition, mechanical counter is not easy to be disturbed, can guarantee the stable and reliable of counting process.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, and in particular to a counter structure for a frame circuit breaker. Background Technology

[0002] Air circuit breakers (ACBs), as key protective components in medium and low voltage power distribution systems, bear the important responsibility of connecting, carrying, and breaking normal and fault currents. Their operational reliability directly affects the safe and stable operation of the power grid. Every closing and opening operation, especially the breaking of short-circuit currents, causes cumulative mechanical wear and arc erosion to the circuit breaker's mechanical components (such as the operating mechanism, spring system, contacts, and arc-extinguishing chamber). This cumulative wear will ultimately degrade the circuit breaker's breaking performance, insulation strength, and mechanical stability, significantly increasing the risk of maloperation, failure to operate, and even serious accidents.

[0003] Therefore, accurately recording the cumulative number of circuit breaker operations, especially the number of closing, opening, and important openings (such as short-circuit breaks), is the core basis for assessing the health status of equipment, predicting the remaining service life, formulating scientific maintenance plans, and tracing the operating history. It is also a basic requirement for the standardized management of power equipment.

[0004] Currently, some frame circuit breakers use simple electronic counters. While these counters improve counting accuracy to some extent, they still face significant challenges: insufficient anti-interference capability in the strong electromagnetic environment inside the circuit breaker, leading to miscounting or missed counts; reliance on unstable power sources (such as batteries) may result in data loss; complex installation and wiring; lack of data interfaces hindering integration into modern intelligent management systems; and extremely limited functional expandability. Other products use a solution where the counter system is mounted on the left and right supports of the circuit breaker's operating mechanism. This requires modifications to the operating mechanism components to add the counting device, necessitating a specially customized operating mechanism, which increases delivery time and costs for maintenance and replacement. Alternatively, the counter drive mechanism involves welding an additional part to the main shaft of the circuit breaker's operating mechanism to drive the counter structure. This solution complicates the circuit breaker's operating mechanism, requires customization, and has low reliability. Utility Model Content

[0005] To address the problems of existing electronic counters being susceptible to interference and other counters requiring specially customized operating mechanisms and having complex structures, this utility model provides a counter structure for a frame circuit breaker, including a base and an operating mechanism mounted thereon. The operating mechanism includes a power output shaft and a main shaft driven by the power output shaft. The counter structure is mounted on the base and is located close to the main shaft. The counter structure includes a counter, a bracket, an elastic element, and a connecting rod assembly.

[0006] The counter is mounted on the top of the bracket, and the counter includes a lever for counting;

[0007] The linkage assembly includes a first linkage, a second linkage, and a third linkage; the two ends of the third linkage are respectively hinged to one end of the first linkage and one end of the second linkage; the other end of the first linkage is connected to the end of the lever through the elastic element, and the middle position of the first linkage is rotatably connected to the bracket; the other end of the second linkage is rotatably connected to the main shaft.

[0008] When the frame circuit breaker is in the open state, the lever is in the reset state; when the frame circuit breaker is in the closed state, the main shaft rotates, and the elastic element is stretched by the relative rotation between the connecting rod assemblies, which drives the lever to rotate, thereby realizing one count.

[0009] Furthermore, the bracket includes a first bracket plane, a bracket body, and a second bracket plane. The counter is mounted on the first bracket plane, the first connecting rod is rotatably connected to the bracket body at its middle position, and the second bracket plane is fixed to the base.

[0010] Furthermore, both the first link and the third link are plate-shaped components that include a bent portion.

[0011] Furthermore, the bracket is provided with a limiting boss for restricting the upward rotation of the first connecting rod.

[0012] Furthermore, the elastic element is a spring.

[0013] Compared with the prior art, this utility model has the following beneficial effects:

[0014] By directly mounting the counter on the base and connecting it to the existing operating mechanism via a linkage assembly, no special customization of the existing operating mechanism is required. This results in a simple structure, flattened parts, and convenient assembly, improving assembly efficiency and facilitating the storage of counter module materials. It also effectively utilizes the circuit breaker installation space without affecting the assembly of other circuit breaker components. Furthermore, the mechanical counter is less susceptible to interference, ensuring a stable and reliable counting process. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention in the open state;

[0016] Figure 2 This is a schematic diagram of the overall structure of the present invention in the closed state;

[0017] Figure 3 This is a schematic diagram of the connecting rod assembly of this utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the first connecting rod of this utility model;

[0019] Figure 5 This is a schematic diagram of the structure of the bracket of this utility model;

[0020] Figure 6 This is a schematic diagram of the third link of this utility model;

[0021] Figure 7 This is a schematic diagram of the structure of the second connecting rod of this utility model;

[0022] In the diagram: 1. Base; 2. Operating mechanism; 21. Main shaft; 22. Power output shaft; 31. Counter; 311. Display unit; 312. Lever; 32. First connecting rod; 33. Bracket; 331. First plane of bracket; 332. Main body of bracket; 333. Second plane of bracket; 334. Limiting boss; 335. Through hole; 336. Rotation center; 34. Third connecting rod; 35. Second connecting rod; 351. Oval hole; 36. Elastic element. Detailed Implementation

[0023] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention 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 invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0024] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. The terms "upper," "lower," "front," "rear," "top," "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or part referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. It should be understood that such data can be interchanged where appropriate for the embodiments of this utility model described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0025] like Figure 1As shown, in the prior art, the counter structure for a frame circuit breaker includes a base 1 and an operating mechanism 2 mounted thereon. The operating mechanism 2 includes a power output shaft 22 and a main shaft 21 driven by the power output shaft 22. The power output shaft 22 is typically rigidly connected to a handle or electric operating mechanism. Under the control of the handle or electric operating mechanism, the power output shaft 22 drives the main shaft 21 to rotate in the open / closed state of the frame circuit breaker.

[0026] like Figures 1-2 As shown in this application, a counter structure for a frame circuit breaker is provided, wherein the counter structure is mounted on a base 1; the counter structure is located near the main shaft 21, and the counter structure includes a counter 31, a bracket 33, an elastic element 36, and a connecting rod assembly.

[0027] The counter 31 is mounted on the top of the bracket 33. The counter 31 includes a display unit 311 and a lever 312 for counting. The display unit 311 is used to display the number of counts.

[0028] like Figures 1-3 As shown, the linkage assembly includes a first link 32, a second link 35, and a third link 34; both ends of the third link 34 are hinged to one end of the first link 32 and one end of the second link 35, respectively; the other end of the first link 32 is connected to the end of the lever 312 through an elastic element 36, and the first link 32 is rotatably connected to the bracket 33 at its middle position; the other end of the second link 35 is rotatably connected to the main shaft 21.

[0029] The aforementioned rotatable connection can be either statically fixed or allow relative movement with the connected component. For example, it can be connected using a pin or a riveted shaft, but space must be reserved at the riveted shaft pin for the linkage assembly to rotate.

[0030] When the frame circuit breaker is in the open state, the lever 312 is in the reset state; when the frame circuit breaker is in the closed state, the main shaft 21 rotates, and the elastic element 36 is stretched by the relative rotation between the connecting rod assemblies, which drives the lever 312 to rotate, thereby realizing one count.

[0031] Specifically, if 3 and Figure 5 As shown, the bracket 33 includes a first bracket plane 331, a bracket body 332, and a second bracket plane 333. The first bracket plane 331 is provided with mounting holes, and the counter 31 is mounted on the first bracket plane 331 through the mounting holes. The bracket body 332 is provided with through holes 335, and the middle position of the first connecting rod 32 is rotatably connected to the bracket body 332 through the through holes 335. The connection point between the first connecting rod 32 and the bracket body 332 is its rotation center 336. The second bracket plane 333 is fixed on the base 1.

[0032] To meet the requirements for component installation space and ease of installation, the linkage assemblies are not limited to flat plate structures, such as... Figure 4 and Figure 6 As shown, both the first link 32 and the third link 34 are plate-shaped components with bent portions. By bending the first link 32 and the third link 34 away from the bracket 33, installation space is provided for their connection.

[0033] The working principle of this application is as follows:

[0034] Counter 31 is existing technology. When the lever 312 is subjected to external force, it moves downwards. When the external force is removed, because the lever 312 is connected to the reset spring inside the counter 31, the reset spring will cause the lever 312 to return to its reset position (e.g., ...). Figure 3 (As shown in the horizontal position) and complete one count.

[0035] like Figure 7 As shown, an oblong hole 351 is provided at the connection between the second connecting rod 35 and the main shaft 21, which cooperates with the corresponding positioning component to ensure the accuracy of the opening / closing position.

[0036] like Figure 1 and Figure 2 As shown, when the frame circuit breaker is in the open state, the lever 312 is in the reset state, and the elastic element 36 is at its natural length and is not stretched. During the closing process of the frame circuit breaker, the main shaft 21 rotates counterclockwise, causing the second connecting rod 35 to rotate together to the closed position. The second connecting rod 35 drives the third connecting rod 34 to rotate away from the base 1. The second connecting rod 35 and the third connecting rod 34 tend to be in a straight line position. The third connecting rod 34 drives the first connecting rod 32 to rotate clockwise around its rotation center 336. The end of the first connecting rod 32 connected to the elastic element 36 descends. At this time, the elastic element 36 is stretched, causing the lever 312 to rotate downward, completing one count.

[0037] When the frame circuit breaker switches back to the open position, the clockwise rotation of the main shaft 21 causes the second connecting rod 35 to rotate to the open position. The second connecting rod 35 then causes the third connecting rod 34 to rotate towards the base 1, bringing the second connecting rod 35 and the third connecting rod 34 closer to an angle. The second connecting rod 35 then causes the first connecting rod 32 to rotate counterclockwise around its rotation center 336. One end of the first connecting rod 32 connected to the elastic element 36 rises, and the elastic element 36 gradually returns to its natural length. As the tension in the elastic element 36 is removed, the lever 312 returns to the reset state under the action of the reset spring in the counter 31.

[0038] In one implementation, the elastic element 36 is a spring. It should be noted that the elastic element 36 can also be other elastic components such as an elastic band. The elastic element 36 enables the connection between the linkage assembly and the lever 312, avoiding the need for additional rigid connecting parts and fasteners, optimizing the mechanical structure, and reducing manufacturing costs.

[0039] As a preferred implementation method, such as Figure 3 and Figure 5 As shown, the bracket 33 is provided with a limiting boss 334 for limiting the upward rotation of the first connecting rod 32, so as to ensure the stability of the rotation of the connecting rod assembly during the process of restoring from opening to closing.

[0040] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of implementation of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this utility model, and all such improvements and modifications should be covered within the protection scope of this utility model.

Claims

1. A counter structure for a frame circuit breaker, comprising a base (1) and an operating mechanism (2) mounted thereon, the operating mechanism (2) comprising a power output shaft (22) and a main shaft (21) driven by the power output shaft (22); characterized in that, A counter structure is installed on the base (1); The counter structure is located close to the main shaft (21), and the counter structure includes a counter (31), a bracket (33), an elastic element (36), and a linkage assembly; The counter (31) is mounted on the top of the bracket (33), and the counter (31) includes a lever (312) for counting; The linkage assembly includes a first link (32), a second link (35), and a third link (34); the two ends of the third link (34) are respectively hinged to one end of the first link (32) and one end of the second link (35); the other end of the first link (32) is connected to the end of the lever (312) through the elastic element (36), and the first link (32) is rotatably connected to the bracket (33) at its middle position; the other end of the second link (35) is rotatably connected to the main shaft (21); When the frame circuit breaker is in the open state, the lever (312) is in the reset state; when the frame circuit breaker is in the closed state, the main shaft (21) rotates, and the elastic element (36) is stretched by the relative rotation between the connecting rod assemblies, which drives the lever (312) to rotate, thereby realizing one count.

2. The counter structure for a frame circuit breaker according to claim 1, characterized in that, The bracket (33) includes a first bracket plane (331), a bracket body (332), and a second bracket plane (333). The counter (31) is mounted on the first bracket plane (331). The first connecting rod (32) is rotatably connected to the bracket body (332) at the middle position. The second bracket plane (333) is fixed to the base (1).

3. The counter structure for a frame circuit breaker according to claim 1, characterized in that, Both the first link (32) and the third link (34) are plate-shaped components with bends.

4. The counter structure for a frame circuit breaker according to claim 1, characterized in that, The bracket (33) is provided with a limiting boss (334) for restricting the upward rotation of the first connecting rod (32).

5. A counter structure for a frame circuit breaker according to claim 1, characterized in that, The elastic element (36) is a spring.

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