A circuit breaker

Abstract

The present invention provides a circuit breaker, comprising a shell, in which an operating mechanism and a locking structure are arranged, the operating mechanism is provided with a linkage shaft, the locking structure comprises a driving rod for linear motion, and a locking member driven by the driving rod and capable of counteracting the linkage shaft, the locking structure having an initial position separated from the linkage shaft, and a locking position locked with the linkage shaft, when locked, the linkage shaft is in an opening position, the driving rod is moved upward, and the locking member is driven by the driving rod to move to the locking position, and the locking member counteracts the linkage shaft to complete the locking, when unlocked, the driving rod is moved downward, the locking member is separated from the linkage shaft and restored to the initial position, at which time the linkage shaft is movable, and when the locking structure is in the locked state, if someone else pushes the handle to close the circuit breaker or remotely controls the circuit breaker to close, the operating mechanism of the circuit breaker cannot move to the closing position, thereby ensuring the personal safety of maintenance personnel during maintenance and greatly improving the safety during maintenance.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit breakers, and in particular to a circuit breaker. Background Art

[0002] Circuit breakers are one of the most important switching electrical equipment in low-voltage power distribution systems. They control power distribution lines and provide fault protection in power distribution systems, and are extremely important to the safety, stability, and economic operation of power grids.

[0003] The circuit breaker has an operating mechanism, which generally includes a handle, a connecting rod, a trip latch and a locking piece. The handle and the trip latch are connected by a connecting rod. The trip latch can be offset against the locking piece. The locking piece is provided with a linkage piece, which is used to connect the locking pieces of two adjacent circuit breakers, thereby realizing synchronous opening of multiple circuit breakers. However, in practical applications, it also has certain defects. That is, when a circuit fails and personnel maintenance is required, the maintenance personnel will switch the circuit breaker to the opening state. However, if someone else pushes the handle to close the circuit breaker or remotely controls the circuit breaker to close, this will pose a great safety threat to the maintenance personnel. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect in the prior art that the handle is easily mistakenly closed during maintenance, thereby providing a circuit breaker capable of locking the operating mechanism.

[0005] To this end, the present invention provides a circuit breaker, comprising a housing, in which an operating mechanism for controlling opening and closing of the circuit breaker is provided, the operating mechanism being provided with a linkage shaft for connecting multiple circuit breakers to achieve synchronous linkage, the housing being provided with a locking structure for locking the linkage shaft in an opening position, the locking structure comprising a shift rod for linear motion, and a locking member driven by the shift rod to abut against the linkage shaft, the locking structure having an initial position separated from the linkage shaft, and a locking position in which the linkage shaft is locked in cooperation with the linkage shaft.

[0006] The locking member is rotatably installed in the shell, and the locking member includes a first main body portion and a first flat plate portion provided on a side of the first main body portion close to the shift rod, the first flat plate portion abuts against the second flat plate portion at the bottom of the shift rod, and the first main body portion is provided with a groove abutting against the linkage shaft.

[0007] The locking member is installed in the housing through a rotating shaft connection structure. The rotating shaft connection structure includes a rotating shaft provided on the housing, and a socket provided on the locking member and capable of being adapted to be connected to the rotating shaft.

[0008] A torsion spring for driving the locking member to return to its initial position is sleeved on the portion of the rotating shaft extending out of the insertion hole. The torsion spring has a first extension portion and a second extension portion. The first extension portion abuts against the first flat plate portion, and the second extension portion abuts against the first stop block inside the shell.

[0009] The first flat plate portion and the first stopper are respectively provided with a first blocking portion and a second blocking portion for blocking the first extending portion and the second extending portion.

[0010] A second stopper is provided in the housing, and the second stopper can abut against the locking member when the locking member is located at an initial position.

[0011] A leakage release is provided in the shell, and the leakage release has a top rod that can be extended in the vertical direction. The top rod can be against the bottom surface of the first flat plate part of the locking member, and when leakage occurs, the top rod can drive the locking member to rotate to the opening position.

[0012] A positioning structure is provided between the shift lever and the shell, and the positioning structure includes a positioning block, a first positioning groove and a second positioning groove. The positioning block is provided on the shift lever; the first positioning groove and the second positioning groove are provided in the shell and can be adapted to be connected with the positioning block. The first positioning groove and the second positioning groove are arranged sequentially along the vertical direction.

[0013] The shift lever includes a second main body, a third extension and a lifting portion. The third extension is arranged on the second main body and extends toward one side of the first positioning groove. The positioning block is arranged on the third extension. The lifting portion is arranged at the top of the second main body, and the lifting portion extends out of the shell.

[0014] The shell has an opening for the lever to extend out, the second main body of the lever is a square rod, the opening is a square opening adapted to the second main body, and the shell is provided with an inverted L-shaped slot to prevent the lever from detaching, and the lever is inserted into the inverted L-shaped slot.

[0015] The technical solution of the present invention has the following advantages:

[0016] When the breaker is unlocked, the lever is moved downward, the locking member is separated from the linkage shaft and restored to the initial position, and the linkage shaft is movable at this time. When the locking structure is in the locked state, if someone else pushes the handle to close the circuit breaker or remotely controls the circuit breaker to close, the operating mechanism of the circuit breaker cannot move to the closed position. This can ensure the personal safety of maintenance personnel during maintenance and greatly improve the safety during maintenance.

[0017] 2. In the circuit breaker provided by the present invention, a torsion spring is sleeved on the portion of the rotating shaft extending from the insertion hole, which is used to drive the locking member to return to its initial position. The torsion spring has a first extension portion and a second extension portion. The first extension portion abuts against the first flat portion, and the second extension portion abuts against the first stop block inside the housing. The torsion spring can reset the locking member. In addition, the torsion spring sleeved on the rotating shaft can make the internal structure more compact and facilitate assembly.

[0018] 3. In the circuit breaker provided by the present invention, the first flat portion and the first stopper are respectively provided with a first blocking portion and a second blocking portion for blocking the first extension portion and the second extension portion, thereby preventing the torsion spring from separating from the rotating shaft.

[0019] 4. The circuit breaker provided by the present invention has a positioning structure provided between the lever and the housing, the positioning structure including a positioning block, a first positioning groove and a second positioning groove, the positioning block being provided on the lever; the first positioning groove and the second positioning groove being provided in the housing and adaptably connected to the positioning block, the first positioning groove and the second positioning groove being arranged sequentially along the vertical direction, the positioning structure enabling the lever to be accurately and fixedly located in the initial position and the locked position during operation, and the adaptably connected positioning block, the first positioning groove and the second positioning groove having the advantage of a simple structure.

[0020] 5. The circuit breaker provided by the present invention has an opening on the housing through which the lever can extend. The second main body of the lever is a square rod, and the opening is a square opening adapted to the second main body. An inverted L-shaped slot is provided in the housing to prevent the lever from detaching. The lever is inserted into the inverted L-shaped slot. Both the opening and the second main body are square. This can prevent the lever from rotating, causing the positioning block on the second main body to separate from the positioning block, thereby failing to achieve the locking function. In addition, the inverted L-shaped slot can prevent the lever from detaching from the housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 is a perspective view of a circuit breaker of the present invention;

[0023] Figure 2 for Figure 1 Schematic diagram of the structure after removing the shell;

[0024] Figure 3 for Figure 2 A schematic diagram of the structure of part A;

[0025] Figure 4 This is a three-dimensional diagram of the leakage release;

[0026] Figure 5 is a three-dimensional diagram of a locking member;

[0027] Figure 6 A three-dimensional diagram of the lever.

[0028] Explanation of the accompanying drawings: 1. Shell; 11. Rotating shaft; 12. First stopper; 13. Second blocking portion; 14. Second stopper; 15. First positioning groove; 16. Second positioning groove; 17. Inverted L-shaped slot; 18. First shell; 19. Second shell; 2. Operating mechanism; 3. Linkage shaft; 4. Push rod; 41. Second flat plate portion; 42. Positioning block; 43. Second main body portion; 44. Third extension portion; 45. Pulling portion; 46. Long hole; 5. Locking member; 51. First main body portion; 52. First flat plate portion; 53. Groove; 54. Insertion hole; 55. First blocking portion; 6. Torsion spring; 61. First extension portion; 62. Second extension portion; 7. Leakage release; 71. Push rod. DETAILED DESCRIPTION

[0029] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0030] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0032] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0033] Example

[0034] This embodiment provides a circuit breaker, including a housing 1, an operating mechanism 2 and a locking structure.

[0035] Shell 1, such as Figure 1-4As shown, the housing 1 includes a first housing 18 and a second housing 19, and an operating mechanism 2 for controlling opening and closing is provided in the first housing 18, and a linkage shaft 3 for connecting multiple circuit breakers to achieve synchronous linkage is provided on the operating mechanism 2, and a locking structure for locking the linkage shaft 3 in the opening position is provided in the second housing 19, and a rotating shaft 11 is provided on the housing 1, and a torsion spring 6 for driving the locking member 5 to return to the initial position is provided on the part of the rotating shaft 11 extending out of the socket 54, and the torsion spring 6 has a first extension portion 61 and a second extension portion 62, the first extension portion 61 is against the first flat portion 52, and the second extension portion 62 is against the first stop block 12 inside the housing 1, and the first stop block 12 is provided with a second blocking portion 13 for blocking the second extension portion 62, and a second stop block 14 is provided in the housing 1, and the second stop block 14 can be engaged with a stop block located at The locking member 5 is abutted against each other in the initial position, and a first positioning groove 15 and a second positioning groove 16 are provided in the shell 1. The first positioning groove 15 and the second positioning groove 16 are arranged in sequence along the vertical direction. A leakage release 7 is provided in the shell 1, and the leakage release 7 has a top rod 71 that can be extended in the vertical direction. The top rod 71 can abut against the bottom surface of the first flat plate portion 52 of the locking member 5, and when leakage occurs, the top rod 71 can drive the locking member 5 to rotate to the opening position. The shell 1 has an opening for the lever 4 to extend, and the opening is a square opening adapted for the second main body portion 43. An inverted L-shaped slot 17 is provided in the shell 1 to prevent the lever 4 from disengaging. The inverted L-shaped slot 17 is provided at the top of the second positioning groove 16 and one side of the second main body portion 43. The inverted L-shaped slot 17 can be inserted into the second main body portion 43 and the third extension portion 44. It should be noted that the operating mechanism is an existing mature technology, so its internal structure and working principle are not described in detail. In this embodiment, the linkage shaft 3 is assembled with the locking member of the operating mechanism 2.

[0036] The locking structure includes a lever 4 that moves linearly, and a locking member 5 that is driven by the lever 4 and can be against the linkage shaft 3. The locking structure has an initial position separated from the linkage shaft 3 and a locking position that cooperates with the linkage shaft 3 to lock.

[0037] Locking member 5, such as Figure 2 、 3 5, it is rotatably installed in the shell 1, and the locking member 5 includes a first main body portion 51, and a first flat plate portion 52 provided on the side of the first main body portion 51 close to the shift rod 4, the first main body portion 51 is provided with a groove 53 that abuts against the linkage shaft 3, the locking member 5 is provided with a socket 54 that can be adapted to be connected to the rotating shaft 11, and the first flat plate portion 52 is provided with a first blocking portion 55 for blocking the first extension portion 61.

[0038] Lever 4, such as Figure 2 、 3 6, it includes a second main body portion 43, a third extension portion 44 and a lifting portion 45, the third extension portion 44 is provided on the second main body portion 43 and extends toward one side of the first positioning groove 15, the lifting portion 45 is provided at the top of the second main body portion 43, and the lifting portion 45 extends out of the shell 1, the bottom of the second main body portion 43 is provided with a second flat plate portion 41 that can be abutted against the first flat plate portion 52, the third extension portion 44 is provided with the positioning block 42 that can be adapted to be connected with the first positioning groove 15 and the second positioning groove 16, the third extension portion 44 is provided with a long strip hole 46, and the second main body portion 43 of the shift lever 4 is a square rod.

[0039] Working Principle: When locking, the linkage shaft 3 is in the open position. First, the lever 4 is moved upward, and the second flat portion 41 at the bottom of the lever 4 drives the locking member 5 to rotate to the locked position. The groove 53 on the locking member 5 is adapted to lock with the linkage shaft 3. When unlocking, the lever 4 is moved downward, and the first extension 61 of the torsion spring 6 applies a downward biasing force to the first flat portion 41, driving the locking member 5 to rotate, causing the groove 53 to separate from the linkage shaft 3. Finally, the locking member 5 rotates to the initial position and abuts against the second stopper 14.

[0040] When the breaker is in the unlocking position, the lever 4 is moved upward, and the locking member 5 is driven by the lever 4 to move to the locked position, and the locking member 5 is opposed to the linkage shaft 3 to complete the locking. When the breaker is unlocked, the lever 4 is moved downward, and the locking member 5 is separated from the linkage shaft 3 and restored to the initial position. At this time, the linkage shaft 3 can move. When the locking structure is in the locked state, if someone else pushes the handle to close the circuit breaker or remotely controls the circuit breaker to close, the operating mechanism 2 of the circuit breaker cannot move to the closed position. This can ensure the personal safety of maintenance personnel during maintenance and greatly improve the safety during maintenance.

[0041] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A circuit breaker, characterized in that: The invention comprises a housing (1), in which an operating mechanism (2) for controlling opening and closing of a circuit breaker is provided, the operating mechanism (2) being provided with a linkage shaft (3) for connecting a plurality of circuit breakers to achieve synchronous linkage, the housing (1) being provided with a locking structure for locking the linkage shaft (3) in an opening position, the locking structure comprising a linearly moving shifting rod (4) and a locking member (5) driven by the shifting rod (4) to abut against the linkage shaft (3), the locking structure having an initial position separated from the linkage shaft (3) and a locking position in which the linkage shaft (3) is locked in cooperation with the linkage shaft (3); A positioning structure is provided between the shifting rod (4) and the housing (1), and the positioning structure comprises: A positioning block (42) is provided on the shifting rod (4); A first positioning groove (15) and a second positioning groove (16) are provided in the housing (1) and can be adapted to be connected to the positioning block (42), wherein the first positioning groove (15) and the second positioning groove (16) are sequentially provided in a vertical direction; The shift lever (4) includes a second main body (43), a third extension (44) and a lifting portion (45), wherein the third extension (44) is provided on the second main body (43) and extends toward one side of the first positioning groove (15), the positioning block (42) is provided on the third extension (44), and the lifting portion (45) is provided on the top of the second main body (43), and the lifting portion (45) extends out of the housing (1); The housing (1) has an opening for the shifting rod (4) to extend out, the second main body (43) of the shifting rod (4) is a square rod, and the opening is a square opening adapted to fit the second main body (43). An inverted L-shaped slot (17) is provided in the housing (1) to prevent the shifting rod (4) from escaping, and the shifting rod (4) is inserted into the inverted L-shaped slot (17).

2. The circuit breaker according to claim 1, wherein: The locking member (5) is rotatably mounted in the housing (1), and the locking member (5) comprises a first main body (51), and a first flat plate portion (52) provided on a side of the first main body (51) close to the shifting rod (4), the first flat plate portion (52) abutting against the second flat plate portion (41) at the bottom of the shifting rod (4), and a groove (53) abutting against the linkage shaft (3) is provided on the first main body (51).

3. The circuit breaker according to claim 2, characterized in that The locking member (5) is installed in the housing (1) via a rotating shaft connection structure, wherein the rotating shaft connection structure comprises a rotating shaft (11) provided on the housing (1), and a socket (54) provided on the locking member (5) and capable of being adapted to connect with the rotating shaft (11).

4. The circuit breaker according to claim 3, characterized in that A torsion spring (6) for driving the locking member (5) to return to its initial position is sleeved on the portion of the rotating shaft (11) extending out of the insertion hole (54), the torsion spring (6) having a first extension portion (61) and a second extension portion (62), the first extension portion (61) abutting against the first flat plate portion (52), and the second extension portion (62) abutting against the first stopper (12) inside the housing (1).

5. The circuit breaker according to claim 4, characterized in that The first flat plate portion (52) and the first stopper (12) are respectively provided with a first blocking portion (55) and a second blocking portion (13) for blocking the first extension portion (61) and the second extension portion (62).

6. The circuit breaker according to claim 5, characterized in that A second stopper (14) is provided in the housing (1), and the second stopper (14) can abut against the locking member (5) when the locking member (5) is located at an initial position.

7. The circuit breaker according to claim 2, wherein: A leakage release (7) is provided in the housing (1), and a top rod (71) is provided in the leakage release (7) that can be extended in a vertical direction. The top rod (71) can abut against the bottom surface of the first flat plate portion (52) of the locking member (5), and when leakage occurs, the top rod (71) can drive the locking member (5) to rotate to an opening position.

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