Adjustable circuit breaker interlocking mechanism

Abstract

The utility model discloses an adjustable circuit breaker interlocking mechanism, which belongs to the technical field of circuit breakers, and comprises a lock shell, a lock box arranged on the lock shell, an interlocking plate rotatably connected in the lock box, and a locking pin in transmission connection with the interlocking plate, and further comprises a driving part used for driving the interlocking plate to rotate; the driven piece comprises a shifting rod wheel rotationally arranged in the lock box, the shifting rod wheel rotates clockwise, the interlocking plate is fixedly connected with a shifting rod used for driving the shifting rod wheel, the shifting rod wheel comprises a plurality of driven rods, and at least one driven rod is connected with a shifting piece. According to the adjustable circuit breaker interlocking mechanism provided by the utility model, the use frequency of the circuit breaker interlocking mechanism is used as a lubrication condition, and the lubricating oil can be supplemented in time when the lubricating oil is obviously consumed, so that the structural wear caused by insufficient lubrication of the interlocking plate is reduced, and the service life of the circuit breaker interlocking mechanism is prolonged.

Description

Technical Field

[0001] This utility model belongs to the field of circuit breaker technology, specifically, it relates to an adjustable circuit breaker interlocking mechanism. Background Technology

[0002] To ensure operational safety, low-voltage withdrawable switchgear is designed with a mechanism that prevents the circuit breaker from being withdrawn or inserted into the drawer when it is closed, thus preventing risks associated with operation under load. This safety mechanism relies on a combination of mechanical and electrical interlocks to jointly ensure the safe operation of the switchgear.

[0003] Mechanical interlocking mechanisms use microswitches to precisely detect the closed and open states of circuit breakers, and based on this, determine whether to move the locking pin via the interlocking plate to unlock the circuit. However, critical connections on the interlocking plate (such as those with the operating handle or slide plate) are subject to long-term external forces and are prone to deformation. This deformation may prevent the interlocking plate from properly engaging with the operating handle or other critical components, thereby affecting the interlocking function and reducing overall safety.

[0004] To address the aforementioned issues, the current practice is to periodically lubricate the interlocking plate and related components, aiming to reduce friction between parts and delay deformation caused by friction. However, this method has limitations: First, even with periodic lubrication, wear on the interlocking plate caused by a lack of timely lubrication in the early stages is irreversible and difficult to restore to its optimal condition; second, the amount of grease applied during lubrication is difficult to control precisely, as applying too much may lead to waste, while applying too little may affect the lubrication effect or even exacerbate component wear. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an adjustable circuit breaker interlocking mechanism.

[0006] In this invention, the specific location of the lubrication point is the connection or transmission point between the structures, such as the transmission connection between the interlocking plate and the locking pin, or the transmission part inside the drive component.

[0007] To achieve the aforementioned objectives, the technical solution adopted by this utility model includes:

[0008] The lock housing includes a lock box, an interlocking plate rotatably connected inside the lock box, and a locking pin drivingly connected to the interlocking plate. The lock housing also includes:

[0009] A driving component, the driving component being used to drive the interlocking plate to rotate;

[0010] The driven component includes a lever wheel rotatably disposed in the lock box, the lever wheel rotating clockwise, and a lever for driving the lever wheel is fixedly connected to the interlocking plate. The lever wheel includes multiple driven levers, and at least one driven lever is connected to a lever plate.

[0011] The lubricating component includes a receiving box connected to the lock box, the receiving box having a space for holding liquid lubricating oil, an oil outlet pipe provided inside the lock box, a hose connected inside the oil outlet pipe, the oil outlet pipe conducting lubricating oil to the lubrication point of the interlocking plate through the hose, and a triggering element for controlling oil output provided inside the oil outlet pipe, when the paddle contacts the triggering element, the lubricating oil will enter the hose through the oil outlet pipe.

[0012] In this invention, when the driving component drives the interlocking plate to rotate and unlock once, it causes the lever to rotate one of the driven rods, which in turn causes the lever wheel to rotate the lever. After the interlocking plate rotates multiple times, the lever gradually rotates to contact the trigger. By pushing the trigger with the lever, lubricating oil can be controlled to flow out to the lubrication point for lubrication. This allows for precise control of lubricating oil flow based on the number of times the interlocking plate is used, resulting in more timely and accurate lubrication of the interlocking plate.

[0013] Preferably, the trigger includes an oil outlet groove formed in the oil outlet pipe, a trigger channel is formed in the oil outlet groove, a push rod is slidably connected in the trigger channel, the push rod and the oil outlet groove form a seal, a connecting spring is fixedly connected to one side of the push rod, the connecting spring is fixedly connected to the inner wall of the trigger channel, and an oil outlet is formed through the push rod. When the paddle pushes the push rod to move, the oil outlet communicates with the inside of the oil outlet groove.

[0014] Preferably, the top and bottom of the push rod are fixedly connected with elastic sealing covers, the oil outlet is set inside the elastic sealing covers, and the two elastic sealing covers are respectively connected to the oil outlet grooves at corresponding positions.

[0015] Preferably, a rigid tube is fixedly connected inside the flexible hose, and a lubrication hole for conveying lubricating oil is opened inside the rigid tube.

[0016] Preferably, it further includes a check mechanism, which includes a check ratchet coaxially mounted with the lever wheel, a check pawl rotatably disposed on one side of the check ratchet, and a mainspring fixedly connected to one side of the check pawl, the mainspring being connected to the lock box.

[0017] Preferably, the driving component includes two meshing driven gears and a driving gear, and the interlocking plate rotates coaxially with the driven gears.

[0018] Compared with the prior art, the advantages of this utility model include:

[0019] (1) The adjustable circuit breaker interlocking mechanism provided by this utility model, when the number of times the circuit breaker interlocking mechanism is used reaches the condition that lubrication needs to be replenished, the lubricating element will be pushed by the paddle to lubricate the lubrication point of the circuit breaker interlocking mechanism. The number of times the circuit breaker interlocking mechanism is used as the lubrication condition, and lubricating oil can be replenished in time when there is obvious consumption of lubricating oil, thereby reducing the structural wear caused by insufficient lubrication of the interlocking plate, improving the service life of the circuit breaker interlocking mechanism, and preventing the circuit breaker interlocking mechanism from deforming due to wear and causing functional failure, thus improving the operational safety of the low-voltage withdrawable switchgear;

[0020] (2) The adjustable circuit breaker interlocking mechanism provided by this utility model can adjust the oil output frequency of the lubricating oil by adjusting the number of paddles on the lever wheel, thereby adjusting the amount of lubricating oil applied according to the different lubrication requirements of the circuit breaker interlocking mechanism, thereby avoiding insufficient or excessive lubricating oil, avoiding lubrication waste, and reducing the use cost of the circuit breaker interlocking mechanism. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is an overall schematic diagram of an adjustable circuit breaker interlocking mechanism according to the present invention;

[0023] Figure 2 This is a schematic diagram showing the explosion effect of the internal structure of the lock box in this utility model;

[0024] Figure 3 This is a schematic diagram of the driven gear in this utility model;

[0025] Figure 4 This is a schematic diagram of the lever wheel in this utility model;

[0026] Figure 5 for Figure 4 Enlarged view of the structure at point A in the middle;

[0027] Figure 6 This is a schematic diagram of the connection structure of the oil outlet groove in this utility model;

[0028] Figure 7 This is a schematic diagram of the connection structure between the anti-return pawl and the anti-return ratchet of this utility model;

[0029] Figure 8This is a schematic diagram of the internal structure of the interlocking plate in this utility model.

[0030] Figure label:

[0031] 1. Lock housing; 2. Receiving box; 3. Lock case; 4. Handle; 5. Locking pin; 6. Drive shaft; 7. Top cover; 8. Check ratchet; 9. Check pawl; 10. Interlocking plate; 11. Sliding plate; 12. Oil outlet pipe; 13. Hose; 14. Rigid pipe; 15. Drive gear; 16. Driven gear; 17. Lever wheel; 18. Actuating lever; 19. Connecting hole; 20. Fine hole channel; 21. Return spring; 22. Paddle; 23. Push rod; 24. Mounting cover; 25. Oil outlet groove; 26. Connecting spring; 27. Elastic sealing cover; 28. Oil outlet; 29. ​​Adjustment port; 30. Fixing bracket. Detailed Implementation

[0032] In view of the shortcomings of the prior art, the inventor of this utility model has, through long-term research and extensive practice, proposed the technical solution of this utility model. The following will further explain and illustrate the technical solution, its implementation process, and its principles in conjunction with the accompanying drawings and specific implementation examples.

[0033] It should be noted that the embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. The described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, the present invention covers any substitutions, modifications, equivalent methods and solutions made within the spirit, principles and scope of the present invention as defined by the claims. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] In the description of this application, the terms "first," "second," "third," and similar words do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "a" or "one," and similar words do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including," and similar words mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including," and their equivalents, but do not exclude other elements or objects. The terms "connected" or "linked," and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect.

[0035] In the description of this application, the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this application and for simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, when using positional terms such as "both sides," "outer side," and "upper and lower," it should be understood that they are used only for ease of understanding and description, taking into account that the structure may be oriented to other positions.

[0036] In the description of this application, unless otherwise expressly specified and limited, the technical or scientific terms used shall have the ordinary meaning understood by a person with ordinary skills in the art to which this application pertains. Terms such as “installation,” “connection,” and “joining” shall be interpreted broadly, for example, as fixed connection, detachable connection, mating connection, or integral connection. For a person skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0037] This utility model embodiment is intended to introduce and explain the structural composition of an adjustable circuit breaker interlocking mechanism and the cooperation relationship between the various components. Unless otherwise specified, the dimensions, materials, and manufacturing processes of the various components in the adjustable circuit breaker interlocking mechanism in this utility model embodiment can be selected according to specific circumstances, and no special limitations or explanations are made here.

[0038] Furthermore, to provide the public with a better understanding of this utility model, certain specific details are described in detail in the following description. However, those skilled in the art can fully understand this utility model even without these detailed descriptions.

[0039] Example 1

[0040] Please see Figure 1 , Figure 2 , Figure 3 and Figure 4 An adjustable circuit breaker interlocking mechanism includes a lock housing 1.

[0041] Specifically, a fixed frame 30 is fixedly connected to the bottom of the lock housing 1, a locking pin 5 is slidably connected to the fixed frame 30, a return spring 21 is sleeved on the locking pin 5, one end of the return spring 21 is fixedly connected to the fixed frame 30, the other end of the return spring 21 is fixedly connected to the locking pin 5, and a sliding plate 11 is rotatably connected to one end of the locking pin 5.

[0042] Furthermore, a lock box 3 is fixedly connected to the top of the lock housing 1. The lock box 3 includes an opening and is fixedly connected to the lock housing 1 through the opening. A drive port is located inside the lock housing 1. An interlocking plate 10 is rotatably connected inside the lock box 3. One end of the interlocking plate 10 extends to the drive port. An adjustment port 29 is provided through the interlocking plate 10. The sliding plate 11 includes a short connecting rod rotatably connected to it. The short connecting rod is slidably connected to the adjustment port 29.

[0043] In this embodiment, in the initial state, the reset spring 21 is in the normal state. The rotation of the interlocking plate 10 can drive the sliding plate 11 and the locking pin 5 connected in sequence to move towards the fixed frame 30, thereby unlocking the low-voltage withdrawable switch cabinet drawer. At this time, the reset spring 21 is in the stretched state. When it is necessary to lock again, the force applied to the interlocking plate 10 is released, and the elastic force of the reset spring 21 can drive the locking pin 5 to move and reset and re-lock into the low-voltage withdrawable switch cabinet.

[0044] Specifically, the lock box 3 is equipped with a drive component for driving the interlocking plate 10. The drive component includes two transmission shafts rotatably connected inside the lock box 3. A driven gear 16 is fixedly connected to one of the transmission shafts. The driven gear 16 and the interlocking plate 10 are both mounted on the same transmission shaft. A drive gear 15 is fixedly connected to the other transmission shaft. The drive gear 15 meshes with the driven gear 16. One end of the transmission shaft connected to the drive gear 15 has a mating hole. A drive shaft 6 is inserted into the mating hole. A handle 4 is fixedly connected to one end of the drive shaft 6 that extends to the outside of the lock box 3.

[0045] In this embodiment, after the circuit breaker is tripped, the drive gear 15 can be rotated by applying force to the handle 4. The drive gear 15 drives the driven gear 16 to rotate, and the driven gear 16 drives the interlocking plate 10 coaxial with it to rotate. The rotation of the interlocking plate 10 can drive the sliding plate 11 and the locking pin 5 connected in sequence to move towards the fixed frame 30, thereby unlocking the drawer of the low-voltage pull-out switch cabinet.

[0046] Please see Figure 5 , Figure 6 , Figure 7 , Figure 8 An adjustable circuit breaker interlocking mechanism includes a driven component and a lubricating component. The driving component controls the lubricating component to deliver liquid lubricating oil to lubricate the circuit breaker interlocking mechanism by driving the driven component.

[0047] Specifically, the driven component includes a driven shaft rotatably connected inside the lock box 3, a check ratchet 8 fixedly connected to the driven shaft, a check pawl 9 rotatably connected inside the lock box 3, a mainspring fixedly connected to one side of the check pawl 9, and the mainspring connected to the lock box 3.

[0048] In this embodiment, when the check ratchet 8 rotates clockwise, the ratchet teeth of the check ratchet 8 will push the check pawl 9 to rotate. The repeated changes between the deformation and elastic recovery of the spring enable the check ratchet 8 to rotate continuously in the clockwise direction. When the check ratchet 8 rotates counterclockwise, the end of the check pawl 9 will abut against the ratchet teeth of the check ratchet 8, thus restricting the rotation of the check ratchet 8.

[0049] In this embodiment, a lever wheel 17 is fixedly connected to the driven shaft. The lever wheel 17 includes multiple driven rods, one of which is connected to a paddle 22. In other embodiments, the number of paddles 22 can be selected from two, three, or four.

[0050] Specifically, a lever 18 is fixedly connected to one side of the interlocking plate 10, and the lever 18 and the driven lever are installed on the same horizontal plane.

[0051] It should be noted that during both the opening and closing processes, the rotation angle of handle 4 will not exceed 180 degrees, so that the actuating rod 18 on the interlocking plate 10 can only swing. When handle 4 is rotated, the actuating rod 18 will actuate one of the driven rods to rotate. When handle 4 is reset, since the lever wheel 17 is difficult to rotate counterclockwise, the end of the actuating rod 18 will be pressed against the driven rod on its reset path. The end of the actuating rod 18 undergoes slight elastic deformation, thereby resetting the actuating rod 18 through the driven rod. In this way, the lever wheel 17 can be driven to rotate every time the circuit breaker interlocking mechanism is unlocked.

[0052] Specifically, the lubricating component includes an oil outlet pipe 12 fixedly connected to the lock box 3, an oil outlet groove 25 opened inside the oil outlet pipe 12, and a trigger for controlling oil output inside the oil outlet pipe 12. The trigger includes a mounting cover 24 fixedly connected to one side of the oil outlet pipe 12, a trigger channel opened inside the oil outlet pipe 12 and the mounting cover 24, a push rod 23 slidably connected inside the trigger channel, a connecting spring 26 fixedly connected to one side of the push rod 23, the connecting spring 26 fixedly connected to the inner wall of the trigger channel, an oil outlet 28 penetrating through the push rod 23, when the paddle 22 pushes the push rod 23 to move, the oil outlet 28 communicates with the inside of the oil outlet groove 25, elastic sealing covers 27 are fixedly connected to the top and bottom of the push rod 23, the oil outlet 28 is located inside the elastic sealing covers 27, the two elastic sealing covers 27 are respectively connected to the corresponding oil outlet grooves 25, and a seal is formed between the push rod 23 and the oil outlet grooves 25.

[0053] Specifically, a receiving box 2 is fixedly connected to the top of the oil outlet pipe 12. The top of the receiving box 2 is covered with a top cover 7. The receiving box 2 has a receiving space for liquid lubricating oil. The oil outlet pipe 12 is connected to the inside of the receiving space. A hose 13 is fixedly connected to the bottom of the oil outlet pipe 12. A rigid pipe 14 is connected inside the hose 13 near the oil outlet pipe 12. A lubrication hole for conveying lubricating oil is opened in the rigid pipe 14.

[0054] Furthermore, the interlocking plate 10 has two fine-hole channels 20, and the top of the interlocking plate 10 has a connecting hole 19. The hose 13 is fixedly connected to the connecting hole 19 and internally connected. The two fine-hole channels 20 are internally connected to the regulating port 29. The liquid lubricating oil flowing out of the hose 13 can sequentially flow through the connecting hole 19, the two fine-hole channels 20, and into the regulating port 29 to contact the sliding plate 11 for lubrication. The rigid tube 14 is located above the meshing point of the driving gear 15 and the driven gear 16. When the liquid lubricating oil enters the rigid tube 14, it moves along the inner wall of the rigid tube 14 to the area above the meshing point of the driving gear 15 and the driven gear 16, and drips through the lubrication hole to the meshing point of the driving gear 15 and the driven gear 16, thereby lubricating the meshing point of the driving gear 15 and the driven gear 16.

[0055] In this embodiment, the specific unlocking steps of the circuit breaker interlocking mechanism after tripping are as follows:

[0056] S1. By applying force to the handle 4, the drive gear 15 can be rotated, which drives the driven gear 16 to rotate, and the driven gear 16 drives the interlocking plate 10 coaxial with it to rotate.

[0057] S2. By rotating the interlocking plate 10, the sliding plate 11 and locking pin 5 connected in sequence can be moved towards the fixed frame 30, thereby unlocking the drawer of the low-voltage pull-out switch cabinet.

[0058] During the unlocking process of the low-voltage withdrawable switchgear drawer, force is applied to rotate the handle 4, causing the interlocking plate 10 to rotate. This causes the actuating lever 18 to actuate one of the driven levers, making it rotate. After releasing the handle 4, because the lever wheel 17 is difficult to rotate counterclockwise, the end of the actuating lever 18 will be pressed against the driven lever on its reset path. The end of the actuating lever 18 undergoes slight elastic deformation, thereby resetting the actuating lever 18 through the driven lever. In this way, each unlocking use of the circuit breaker interlocking mechanism can drive the lever wheel 17 to rotate, and the lever piece 22 connected to the lever wheel 17 will also move with the rotation of the lever wheel 17. When the lever 22 moves to the state of contact with the push rod 23, the lever 22 presses the push rod 23 to move it, and the connecting spring 26 is deformed by the force of the compression, so that the oil outlet 28 moves to the state of docking with the oil outlet groove 25. At this time, the liquid lubricating oil in the oil outlet groove 25 will flow out along the inner wall of the hose 13 and the rigid pipe 14 to lubricate the circuit breaker interlocking mechanism. When the lever 22 rotates to the state of disconnection from the push rod 23, the elastic force of the connecting spring 26 drives the push rod 23 to move and reset. The side wall of the push rod 23 abuts against the side wall of the trigger channel to block the oil outlet groove 25, thereby stopping the oil outlet and ending the lubrication.

[0059] It should be understood that the above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. It should not be considered that the specific implementation of this utility model is limited to these descriptions. For those skilled in the art to which this utility model pertains, several simple deductions or substitutions can be made without departing from the concept of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the protection scope of this utility model.

Claims

1. An adjustable circuit breaker interlocking mechanism, comprising a lock housing (1), a lock box (3) is arranged on the lock housing (1), an interlocking plate (10) is connected in the lock box (3), a locking pin (5) is connected on the interlocking plate (10), characterized in that, It also includes: a driving component, which is used to drive the interlocking plate (10) to rotate; The driven component includes a lever wheel (17) rotatably disposed in the lock box (3), the lever wheel (17) rotating in a clockwise direction, and a lever (18) for driving the lever wheel (17) is fixedly connected to the interlocking plate (10). The lever wheel (17) includes multiple driven levers, and at least one driven lever is connected to a paddle (22). The lubricating component includes a receiving box (2) connected to the lock box (3) for containing liquid lubricating oil. The lock box (3) is provided with an oil outlet pipe (12), and a hose (13) is connected to the oil outlet pipe (12). The oil outlet pipe (12) conducts the lubricating oil to the lubrication point of the interlocking plate (10) through the hose (13). The oil outlet pipe (12) is provided with a trigger for controlling the oil outlet. When the paddle (22) contacts the trigger, the lubricating oil will enter the hose (13) through the oil outlet pipe (12).

2. An adjustable circuit breaker interlock mechanism according to claim 1, wherein: The triggering element includes an oil outlet groove (25) opened in the oil outlet pipe (12), a triggering channel is opened in the oil outlet groove (25), a push rod (23) is slidably connected in the triggering channel, the push rod (23) and the oil outlet groove (25) form a seal, a connecting spring (26) is connected to one side of the push rod (23), the connecting spring (26) is connected to the inner wall of the triggering channel, and an oil outlet (28) is opened through the push rod (23). When the paddle (22) pushes the push rod (23) to move, the oil outlet (28) communicates with the inside of the oil outlet groove (25).

3. An adjustable circuit breaker interlock mechanism according to claim 2, wherein: The push rod (23) is connected to an elastic sealing cover (27) at both the top and bottom. The oil outlet (28) is located inside the elastic sealing cover (27). The two elastic sealing covers (27) are respectively connected to the oil outlet groove (25) at the corresponding positions.

4. An adjustable circuit breaker interlock mechanism as defined in claim 1, wherein: A rigid tube (14) is fixedly connected inside the flexible tube (13), and a lubrication hole for conveying lubricating oil is opened inside the rigid tube (14).

5. An adjustable circuit breaker interlock mechanism as defined in claim 1, wherein: It also includes a check mechanism, which includes a check ratchet (8) coaxially mounted with the lever wheel (17). A check pawl (9) is rotatably provided on one side of the check ratchet (8). A spring is fixedly connected to one side of the check pawl (9), and the spring is connected to the lock box (3).

6. An adjustable circuit breaker interlock mechanism as defined in claim 1, wherein: The driving component includes two meshing driven gears (16) and a driving gear (15), and the interlocking plate (10) rotates coaxially with the driven gears (16).

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