Interlocking devices and circuit breakers

Abstract

This utility model belongs to the field of medium and high voltage electrical technology, and discloses an interlocking device and a circuit breaker. The interlocking device includes a transmission component, a control component, and an interlocking assembly. The transmission component includes a first gear and a linkage rod, with the linkage rod having a first meshing tooth; the first gear is rotatably disposed within the housing and meshes with the first meshing tooth. The interlocking assembly includes an interlocking plate connected to the first gear. When the linkage rod descends, it drives the first gear to rotate in a first rotation direction, causing the interlocking plate to move towards the closing coil assembly and limit its movement; when the linkage rod rises, it drives the first gear to rotate in a second rotation direction, causing the interlocking plate to move away from the closing coil assembly. This interlocking device, through the meshing of the linkage rod and the first gear to drive the first gear to rotate, achieves the locking or unlocking of the closing coil assembly by the interlocking plate, improving stability compared to a torsion spring structure and eliminating the risk of failure.

Description

Technical Field

[0001] This utility model relates to the field of medium and high voltage electrical technology, and in particular to an interlocking device and a circuit breaker. Background Technology

[0002] Circuit breakers are generally equipped with interlocking devices. When the circuit breaker is manually opened, the interlocking device can lock the closing function to prevent accidental closing and provide safety for the operator.

[0003] In the prior art, the interlocking device includes a control component, a linkage rod, a rotating shaft, and an interlocking plate. The rotating shaft is rotatably mounted inside the housing and is connected to the housing via a torsion spring. The interlocking plate is connected to the rotating shaft. When the circuit breaker needs to be locked, the control component controls the linkage rod to move downward so that the rotating shaft rotates against the elastic force of the torsion spring, thereby driving the interlocking plate to lock the circuit breaker. When the circuit breaker needs to be unlocked, the control component controls the linkage rod to move upward, and the rotating shaft rotates in the opposite direction under the elastic force of the torsion spring, thereby driving the interlocking plate to unlock the circuit breaker.

[0004] The aforementioned torsion spring structure has an instability problem. After prolonged use, the spring force weakens, resulting in a situation where it cannot be unlocked. Utility Model Content

[0005] The purpose of this invention is to provide an interlocking device and a circuit breaker that improves the stability of transmission.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] An interlocking device is applied to a circuit breaker, the circuit breaker including a housing and a closing coil assembly disposed within the housing;

[0008] The interlocking device includes:

[0009] The transmission assembly includes a linkage rod and a first gear. The linkage rod is movably disposed in the housing and has a first meshing tooth. The first gear is rotatably disposed in the housing and meshes with the first meshing tooth.

[0010] An interlocking assembly includes an interlocking plate connected to the first gear;

[0011] The control component is configured to drive the linkage rod to rise and fall, and the linkage rod drives the first gear to rotate, thereby causing the interlocking plate to lock or unlock the closing coil assembly.

[0012] As an optional solution, the linkage is provided with a second meshing tooth;

[0013] The control component includes:

[0014] The control lock is equipped with a bolt.

[0015] A rotating rod is rotatably mounted outside the housing;

[0016] The second gear is fixedly connected to the rotating rod and meshes with the second meshing tooth. The locking bolt can move toward the rotating rod and drive the rotating rod to rotate, so that the rotating rod drives the second gear to rotate, and the second gear drives the linkage rod to descend.

[0017] As an alternative, the control assembly further includes an elastic element and a limiting pin, the limiting pin being radially inserted through the linkage rod, the elastic element being sleeved on the linkage rod and elastically abutting against the housing and the limiting pin, the elastic element being configured to drive the linkage rod upward when the locking bolt moves away from the rotating rod.

[0018] As an alternative, the rotating rod is provided with a lower pressure plate, and the locking bolt presses against the lower pressure plate to make the rotating rod rotate.

[0019] As an alternative, the control assembly further includes a first bracket and a second bracket spaced apart outside the housing, with the rotating rod rotatably mounted on the first bracket and the second bracket.

[0020] As an alternative, the first bracket includes a first horizontal plate, a second horizontal plate, and a vertical plate. The first horizontal plate and the second horizontal plate are parallel to each other, and the vertical plate is vertically connected between the first horizontal plate and the second horizontal plate. The first horizontal plate is connected to the housing, the rotating rod is rotatably connected to the vertical plate, the control lock is disposed on the second horizontal plate, and the locking bolt passes through the second horizontal plate to drive the rotating rod to rotate.

[0021] As an alternative, the second gear includes a connecting sleeve and a sector gear connected to each other, the connecting sleeve being sleeved on the rotating rod, and the sector gear meshing with the second meshing tooth.

[0022] As an optional solution, the interlocking plate is provided with a guide groove;

[0023] The interlocking assembly further includes a connecting pin and a guide pin. The connecting pin is disposed on the first gear, the interlocking plate is hinged to the connecting pin, and the guide pin is disposed inside the housing and slidably limited within the guide groove.

[0024] As an alternative, the first gear is provided with a plurality of circumferentially distributed pin holes, and one of the connecting pins is installed in the pin holes.

[0025] A circuit breaker includes a housing, a closing coil assembly, and an interlocking device as described in any of the above embodiments. The closing coil assembly is disposed within the housing and is used to control the closing of the circuit breaker. The interlocking device is used to lock the closing coil assembly and unlock the closing coil assembly.

[0026] The beneficial effects of this utility model are:

[0027] The interlocking device provided by this utility model drives the first gear to rotate through the meshing of the linkage rod and the first gear, so that the first gear drives the interlocking plate to move toward or away from the closing coil assembly, thereby realizing the locking or unlocking of the closing coil assembly by the interlocking plate. Compared with the torsion spring structure, it improves the transmission stability and eliminates the risk of failure. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the circuit breaker provided in this embodiment of the utility model;

[0029] Figure 2 yes Figure 1 Enlarged view of the structure at point A in the middle;

[0030] Figure 3 This is a schematic diagram of the linkage rod involved in the embodiment of this utility model;

[0031] Figure 4 This is a schematic diagram of the structure of the first support involved in the embodiment of this utility model;

[0032] Figure 5 This is a schematic diagram of the structure of the second gear involved in the embodiment of this utility model;

[0033] Figure 6 This is a schematic diagram of the structure of the first gear involved in the embodiment of this utility model.

[0034] In the picture:

[0035] 1. Shell;

[0036] 2. Closing coil assembly; 21. Tripping plate;

[0037] 3. Interlocking device; 31. Transmission assembly; 311. Linkage rod; 3111. First meshing tooth; 3112. Second meshing tooth; 312. First gear; 3121. Pin hole; 32. Interlocking assembly; 321. Interlocking plate; 3211. Guide groove; 322. Connecting pin; 323. Guide pin; 33. Control assembly; 331. Control lock; 3311. Lock bolt; 332. Rotating rod; 3321. Lower pressure plate; 333. Second gear; 3331. Connecting sleeve; 3331a. Threaded hole; 3332. Sector gear; 334. Elastic element; 335. Limiting pin; 336. First bracket; 3361. First horizontal plate; 3362. Second horizontal plate; 3363. Vertical plate; 337. Second bracket. Detailed Implementation

[0038] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar parts or parts having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0039] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0040] In the description of this utility model, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0041] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0042] like Figure 1As shown, this utility model embodiment provides an interlocking device 3 and a circuit breaker. The circuit breaker includes a housing 1, a closing coil assembly 2, and the interlocking device 3. The closing coil assembly 2 is disposed inside the housing 1 and includes a coil, a moving iron core, and a tripping plate 21. When the coil is energized, it generates magnetic force, which drives the moving iron core to move and push the tripping plate 21 to rotate, thereby closing the circuit breaker. When the circuit breaker is under maintenance, it needs to be opened. To prevent the circuit breaker from closing, the interlocking device 3 is used to limit the rotation of the tripping plate 21. When the coil is energized due to an accident, the interlocking device 3 can limit the rotation of the tripping plate 21, thus preventing the circuit breaker from closing, thereby locking the closing coil assembly 2. When normal operation is restored, the interlocking device 3 moves away from the tripping plate 21 to unlock the closing coil assembly 2.

[0043] The following is in conjunction with the appendix Figures 2-6 The interlocking device 3 provided in the embodiments of this utility model will be described below.

[0044] Specifically, the interlocking device 3 includes a transmission component 31, a control component 33, and an interlocking component 32.

[0045] The transmission assembly 31 includes a first gear 312 and a linkage rod 311. The housing 1 is provided with a through hole. The linkage rod 311 is movably disposed in the through hole of the housing 1, with a part of the linkage rod 311 extending into the housing 1 and the other part located outside the housing 1. The part of the linkage rod 311 located inside the housing 1 is provided with a first meshing tooth 3111. The first gear 312 is rotatably disposed in the housing 1 and meshes with the first meshing tooth 3111.

[0046] The interlocking assembly 32 includes an interlocking plate 321, which is connected to the first gear 312.

[0047] The control component 33 is disposed outside the housing 1 and is configured to control the lifting and lowering of the linkage rod 311. When the linkage rod 311 is lowered, it drives the first gear 312 to rotate in a first rotation direction. The first gear 312 drives the interlocking plate 321 to move toward the closing coil assembly 2 and limits the tripping plate 21 of the closing coil assembly 2. When the linkage rod 311 is raised, it drives the first gear 312 to rotate in a second rotation direction. The first gear 312 drives the interlocking plate 321 away from the closing coil assembly 2 and releases the limit on the tripping plate 21 of the closing coil assembly 2.

[0048] The first rotation direction is opposite to the second rotation direction.

[0049] The interlocking device 3 drives the first gear 312 to rotate through the meshing of the linkage rod 311 and the first gear 312, so that the first gear 312 drives the interlocking plate 321 to move toward or away from the closing coil assembly 2, thereby realizing the locking or unlocking of the closing coil assembly 2 by the interlocking plate 321. Compared with the torsion spring structure, it improves the transmission stability and has no risk of failure.

[0050] Optionally, a second meshing tooth 3112 is provided on another part of the linkage rod 311 located outside the housing 1; the control assembly 33 includes a control lock 331, a rotating rod 332, and a second gear 333. The control lock 331 is equipped with a bolt 3311, which can be moved downwards by an operator using a key. The rotating rod 332 is rotatably mounted outside the housing 1. The second gear 333 is fixedly connected to the rotating rod 332 and meshes with the second meshing tooth 3112. When the bolt 3311 moves downwards, it drives the rotating rod 332 to rotate, causing the rotating rod 332 to drive the second gear 333 to rotate. The second gear 333, through meshing with the second meshing tooth 3112, can cause the linkage rod 311 to descend. This structure achieves the descent of the linkage rod 311 through the meshing of the second gear 333 and the second meshing tooth 3112 of the linkage rod 311, resulting in simple operation and structural stability.

[0051] Optionally, the control assembly 33 further includes an elastic element 334 (which can be a compression spring or multiple stacked disc springs) and a limiting pin 335. The limiting pin 335 passes radially through the linkage rod 311. The elastic element 334 is sleeved on the linkage rod 311 and elastically abuts against the housing 1 and the limiting pin 335. When the operator uses a key to raise the locking bolt 3311, the elastic element 334 pushes the limiting pin 335 with its own elastic force, thereby driving the linkage rod 311 to rise. This structure achieves the raising action of the linkage rod 311 by setting the elastic element 334 and the limiting pin 335, and the structure is simple.

[0052] To facilitate the rotation of the rotating rod 332 driven by the bolt 3311, a lower pressure plate 3321 is provided at one end of the rotating rod 332 corresponding to the control lock 331. The lower pressure plate 3321 is eccentrically positioned toward the bolt 3311. When the bolt 3311 moves downward, it can press against the lower pressure plate 3321 to make the rotating rod 332 rotate.

[0053] Optionally, the control component 33 further includes a first bracket 336 and a second bracket 337 spaced apart outside the housing 1. Both the first bracket 336 and the second bracket 337 are mounted on the housing 1 by screws, and both the first bracket 336 and the second bracket 337 are provided with rotating holes. The rotating rod 332 is rotatably inserted into the rotating holes of the first bracket 336 and the second bracket 337. The rotation of the rotating rod 332 is realized by setting the first bracket 336 and the second bracket 337, which makes the installation and operation convenient.

[0054] Furthermore, referring to Figure 4 As shown, the first bracket 336 includes a first horizontal plate 3361, a second horizontal plate 3362, and a vertical plate 3363. The first horizontal plate 3361 and the second horizontal plate 3362 are parallel to each other, and the vertical plate 3363 is vertically connected between the first horizontal plate 3361 and the second horizontal plate 3362. The first horizontal plate 3361 is connected to the housing 1 by screws. The vertical plate 3363 is provided with a rotating hole, and the rotating rod 332 is rotatably disposed in the rotating hole of the vertical plate 3363. The control lock 331 is disposed on the second horizontal plate 3362, and the locking bolt 3311 passes through the second horizontal plate 3362 to drive the rotating rod 332 to rotate. By setting the first bracket 336, the installation of the rotating rod 332 and the control lock 331 are realized.

[0055] Optionally, refer to Figure 5 As shown, the second gear 333 includes a connecting sleeve 3331 and a sector gear 3332 connected to each other. The connecting sleeve 3331 is sleeved on the rotating rod 332. The sector gear 3332 meshes with the second meshing tooth 3112. By setting the connecting sleeve 3331, the second gear 333 and the rotating rod 332 are easily connected. The sector gear 3332 can reduce the amount of material used and reduce production costs.

[0056] Furthermore, the connecting sleeve 3331 is provided with a threaded hole 3331a. When the rotating rod 332 passes through the center hole of the connecting sleeve 3331, and the second gear 333 rotates and adjusts relative to the rotating rod 332, it can be screwed into the threaded hole 3331a by a set screw and abut against the rotating rod 332 to realize the connection between the connecting sleeve 3331 and the rotating rod 332.

[0057] Optionally, refer to Figure 2 and combined Figure 6 As shown, the interlocking plate 321 is provided with a guide groove 3211; the interlocking assembly 32 also includes a connecting pin 322 and a guide pin 323. The connecting pin 322 is disposed on the first gear 312, and the interlocking plate 321 is hinged to the connecting pin 322. The guide pin 323 is disposed within the housing 1 and is slidably limited within the guide groove 3211. When the first gear 312 rotates, the interlocking plate 321 is guided by the guide pin 323 to enable the interlocking plate 321 to move according to the designed trajectory.

[0058] Optionally, the first gear 312 is provided with multiple circumferentially distributed pin holes 3121, and a connecting pin 322 is selectively installed in one of the pin holes 3121. After the first gear 312 and the linkage rod 311 are installed, the pin hole 3121 can be selected by the connecting pin 322 to adjust the interlocking plate 321, ensuring that the interlocking plate 321 can accurately lock the release plate 21.

[0059] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. Interlocking device, characterized in that Applied to a circuit breaker, the circuit breaker includes a housing (1) and a closing coil assembly (2) disposed within the housing (1); The interlocking device (3) includes: The transmission assembly (31) includes a linkage rod (311) and a first gear (312). The linkage rod (311) is movably disposed in the housing (1). The linkage rod (311) is provided with a first meshing tooth (3111). The first gear (312) is rotatably disposed in the housing (1) and meshes with the first meshing tooth (3111). The interlocking assembly (32) includes an interlocking plate (321) connected to the first gear (312); The control component (33) is configured to drive the linkage rod (311) to rise and fall, and the linkage rod (311) drives the first gear (312) to rotate, thereby causing the interlock plate (321) to lock or unlock the closing coil assembly (2).

2. The interlock of claim 1, wherein, The linkage rod (311) is provided with a second meshing tooth (3112); The control component (33) includes: Control lock (331), equipped with bolt (3311); A rotating rod (332) is rotatably disposed outside the housing (1); The second gear (333) is fixedly connected to the rotating rod (332) and meshes with the second meshing tooth (3112). The locking bolt (3311) can move toward the rotating rod (332) and drive the rotating rod (332) to rotate, so that the rotating rod (332) drives the second gear (333) to rotate, and the second gear (333) drives the linkage rod (311) to descend.

3. The interlock of claim 2, wherein, The control component (33) further includes an elastic element (334) and a limiting pin (335). The limiting pin (335) passes through the linkage rod (311) radially. The elastic element (334) is sleeved on the linkage rod (311) and elastically abuts against the housing (1) and the limiting pin (335). The elastic element (334) is configured to drive the linkage rod (311) to rise when the bolt (3311) moves away from the rotating rod (332).

4. The interlock of claim 2, wherein, The rotating rod (332) is provided with a lower pressure plate (3321), and the locking bolt (3311) presses against the lower pressure plate (3321) to make the rotating rod (332) rotate.

5. The interlock of claim 2, wherein, The control component (33) further includes a first bracket (336) and a second bracket (337) spaced apart outside the housing (1), and the rotating rod (332) is rotatably mounted on the first bracket (336) and the second bracket (337).

6. The interlock of claim 5, wherein, The first bracket (336) includes a first horizontal plate (3361), a second horizontal plate (3362), and a vertical plate (3363). The first horizontal plate (3361) and the second horizontal plate (3362) are parallel to each other. The vertical plate (3363) is vertically connected between the first horizontal plate (3361) and the second horizontal plate (3362). The first horizontal plate (3361) is connected to the housing (1). The rotating rod (332) is rotatably connected to the vertical plate (3363). The control lock (331) is disposed on the second horizontal plate (3362). The bolt (3311) passes through the second horizontal plate (3362) and drives the rotating rod (332) to rotate.

7. The interlock of claim 2, wherein, The second gear (333) includes a connecting sleeve (3331) and a sector gear (3332) connected to each other. The connecting sleeve (3331) is sleeved on the rotating rod (332), and the sector gear (3332) meshes with the second meshing tooth (3112).

8. The interlock of claim 1, wherein, The interlocking plate (321) is provided with a guide groove (3211); The interlocking assembly (32) further includes a connecting pin (322) and a guide pin (323). The connecting pin (322) is disposed on the first gear (312), the interlocking plate (321) is hinged to the connecting pin (322), and the guide pin (323) is disposed in the housing (1) and slidably limited in the guide groove (3211).

9. The interlock of claim 8, wherein, The first gear (312) is provided with a plurality of circumferentially distributed pin holes (3121), and the connecting pin (322) is selectively installed in one of the pin holes (3121).

10. A circuit breaker characterized by The circuit breaker includes a housing (1), a closing coil assembly (2), and an interlocking device (3) as described in any one of claims 1-9. The closing coil assembly (2) is disposed within the housing (1) and is used to control the closing of the circuit breaker. The interlocking device (3) is used to lock the closing coil assembly (2) and unlock the closing coil assembly (2).

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