Circuit breaker and electric control structure thereof

Abstract

The application relates to a circuit breaker and an electric control mechanism thereof, wherein the electric control mechanism comprises a driving part, a tripping part, an electromagnetic driving mechanism and a reset mechanism; the driving part is rotationally arranged between a first position and a second position to drive a movable contact to close or open; the first driving surface of the driving part is provided with the reset mechanism; the tripping part is rotationally arranged between a third position and a fourth position and can move axially between the third position and a fifth position; when the driving part is in the first position, the movable contact is open, the tripping part is in the fifth position, the driving part and the tripping part are axially staggered and abutted; the driving head of the electromagnetic driving mechanism is extended to abut against the first driving surface, the driving part is pushed to rotate to the second position when the movable contact is closed, the tripping part is reset to the third position, the driving head drives the tripping part to rotate to the fourth position, the tripping mechanism drives the movable contact to open, the driving part is reset to the first position, the driving part is axially moved to the fifth position, and the cycle operation of opening and closing is realized.

Description

Technical Field

[0001] This invention relates to the field of low-voltage electrical appliances, and more specifically, to a circuit breaker and its electric control structure. Background Technology

[0002] The low-voltage electrical appliance industry is moving towards intelligentization, as seen in smart homes and 5G communication applications, with 5G network construction underway. Currently, ordinary intelligent miniature circuit breakers in the power distribution industry typically use a motor-driven multi-stage gear set to directly drive the operating mechanism for automatic opening and closing. This method suffers from problems such as numerous parts, large space occupation, and unreliable operation over time. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a circuit breaker and its electric control structure, in view of the above-mentioned defects of the prior art.

[0004] The technical solution adopted by the present invention to solve its technical problem is: to construct an electric control mechanism for a circuit breaker, including a driving component, a tripping component, an electromagnetic driving mechanism, and a reset mechanism;

[0005] The driving component is rotatably disposed between a first position and a second position to drive the moving contact to close or open the circuit breaker. The driving component is provided with a first driving surface, and the reset mechanism provides the driving component with a reset force to reset it to the first position.

[0006] The tripping member is rotatably disposed between the third position and the fourth position, and can move axially between the third position and the fifth position. The reset mechanism provides the tripping member with a reset force for circumferential reset to the third position and a reset force for axial reset to the third position.

[0007] When the driving member is in the first position, the moving contact is open, and the tripping member is in the fifth position, with the driving member and the tripping member axially offset and abutting each other;

[0008] The electromagnetic drive mechanism includes a retractable drive head that extends out and abuts against the first drive surface. When the drive member is rotated to the second position, the moving contact closes, the tripping member resets to the third position, and when the drive head drives the tripping member to rotate to the fourth position, the tripping mechanism causes the moving contact to open, the drive member resets to the first position, and the drive member moves axially to the fifth position.

[0009] In some embodiments, the tripping member is provided with a second driving surface for the driving head to press against, and a driving part for driving the moving contact to open. When the driving head extends and abuts against the second driving surface on the tripping member located at the third position, it drives the tripping member to rotate to the fourth position, and the driving part abuts against the tripping mechanism, causing the moving contact to open.

[0010] In some embodiments, the release element includes a rotating seat and a stop portion extending outward from the side of the rotating seat, wherein the second driving surface is located on the side of the stop portion opposite to the driving head.

[0011] In some embodiments, the abutment portion has an inclined guide surface on the side away from the fifth position, and / or the first driving surface has an inclined surface on the side near the fifth position, so that the driving member can slide to the side of the abutment portion away from the fifth position, press the release member to the fifth position, and reset to the first position.

[0012] In some embodiments, the axes of the drive member and the release member are parallel. When the release member is in the third position, the abutment portion is axially intersecting with the drive member. The guide surface is located on the side of the abutment portion closer to the drive member. When the release member turns to the fourth position, the guide surface presses against the drive member, causing the drive member to slide along the guide surface to the side of the abutment portion away from the fifth position.

[0013] In some embodiments, the first driving surface is an outwardly arched arc surface, and the outer end of the abutment portion has an arc-shaped chamfer on the side away from the driving head.

[0014] In some embodiments, the driving part extends outward from the side of the rotating seat to drive the tripping mechanism to swing and open the moving contact. The second driving surface and the driving part are circumferentially offset from each other in the tripping member.

[0015] In some embodiments, the drive member includes a drive base and a drive disk extending laterally from the drive base, the first drive surface is disposed on the drive disk, and the moving contact is connected to the drive disk via a linkage.

[0016] In some embodiments, the drive disk is fan-shaped and disposed along the outer periphery of the drive seat, and the first drive surface is formed on one end face of the fan-shaped drive disk.

[0017] A circuit breaker includes the aforementioned electric control structure, a moving contact, and a tripping mechanism. The driving member is connected to the moving contact so that, when rotated, it drives the moving contact to swing, thereby achieving closing and opening.

[0018] The circuit breaker and its electric control structure according to the present invention have the following advantages: the electric control structure can realize the cyclic operation of opening and closing through the mechanism. The operation process does not require human operation and can be realized automatically. The structure is simple and reliable and the operation is stable. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0020] Figure 1 This is a schematic diagram of the structure of the drive component of the circuit breaker electric control mechanism in the first position and the tripping component in the fifth position in an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of the drive component of the circuit breaker electric control mechanism in the second position and the tripping component in the third position in an embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the structure of the drive component of the circuit breaker electric control mechanism in the second position and the tripping component in the fourth position in an embodiment of the present invention;

[0023] Figure 4 yes Figure 3 A three-dimensional structural diagram of the drive component of the electric control mechanism in the first position and the tripping component in the fifth position. Detailed Implementation

[0024] To provide a clearer understanding of the technical features, objectives, and effects of the present invention, specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0025] like Figures 1 to 4 As shown, in a preferred embodiment of the present invention, the circuit breaker includes a housing 10, a stationary contact 1, a moving contact 2, a tripping mechanism 3 disposed within the housing 10, and an electric control mechanism 4 for electrically controlling the closing and opening of the moving contact 2 and the stationary contact 1. The moving contact 2 is rotatably disposed, and the electric control mechanism 4 can realize the automatic closing and opening of the moving contact 2.

[0026] The electric control mechanism 4 includes a drive member 41, a tripping member 42, an electromagnetic drive mechanism 43, a reset mechanism, and a tripping mechanism 3. The drive member 41 and the tripping member 42 are rotatably mounted inside the housing 10. The electromagnetic drive mechanism 43 is provided with a retractable drive head 431, which is typically a push rod. The electromagnetic drive mechanism 43 includes an electromagnetic actuator to drive the drive head 431 to extend or retract. Alternatively, the drive head 431 can be driven to extend or retract by a linear motor, or its extension or retraction can be controlled by a switch, etc. The reset mechanism provides a reset force for the drive member 41 and the tripping member 42. Preferably, the reset mechanism includes a first elastic member and a second elastic member. The first elastic member provides a reset force for the drive member 41, and the second elastic member provides a reset force for the tripping member 42.

[0027] The driving member 41 is rotatably configured between the first position A and the second position B. The driving member 41 is connected to the moving contact 2. When rotating, it drives the moving contact 2 to close or open. Specifically, when the driving member 41 is in the first position A, the moving contact 2 is open, and when the driving member 41 is in the second position B, the moving contact 2 is closed.

[0028] The driving member 41 is provided with a first driving surface 411, which can be pressed by the driving head 431 of the electromagnetic driving mechanism 43 to drive the driving member 41 to rotate towards the second position B. A first elastic member provides a reset force for the driving member 41 to return to the first position A. After the external force applied by the electromagnetic driving mechanism 43 to the driving member 41 in the direction of the second position B is removed, the first elastic member can drive the driving member 41 to rotate to the first position A. The first elastic member is typically a torsion spring, which can provide torsional elastic force to the driving member 41. In other embodiments, the first elastic member can also be an elastic leaf spring.

[0029] Furthermore, the tripping member 42 is rotatably disposed between the third position C and the fourth position D, and can move axially between the third position C and the fifth position. The second elastic element provides the tripping member 42 with a circumferential reset force to the third position C and an axial reset force to the third position C. When the tripping member 42 is not subjected to external forces such as the driving member 41 and the driving head 431, it will be in the third position C. The channel of the second elastic element is a torsion spring, which can provide both axial and circumferential elastic force.

[0030] When the drive member 41 rotates to the second position B, the drive member 41 is displaced from the trip member 42. The drive member 41 releases its resistance to the trip member 42 in the axial direction, and the trip member 42 is axially reset to the third position C. The drive member 41 is in the second position B, keeping the contacts in the closed state.

[0031] Specifically, the sequence of actions of the electric control mechanism 4 is as follows: Figure 1As shown, when the drive member 41 is in the first position A, the moving contact 2 is open, the drive member 41 is axially offset from the trip member 42 and abuts against the trip member 42, so that the drive member 41 presses the trip member 42 against the fifth position, and the second elastic member is compressed in the axial direction of the trip member 42.

[0032] When it is necessary to close the circuit, such as Figure 2 As shown, when the electromagnetic drive mechanism 43 is activated, the drive head 431 extends and abuts against the first drive surface 411, pushing the drive member 41 to rotate to the second position B. The drive member 41 then drives the moving contact 2 to close. Since the tripping member 42 is no longer pressed against by the drive member 41 in the axial direction, the tripping member 42 moves and resets to the third position C under the action of the second elastic member.

[0033] When it is necessary to disconnect the circuit breaker again, such as Figure 3 As shown, the driving head 431 can press against the second driving surface 422 on the tripping member 42. Under the force of the driving head 431, the tripping member 42 is driven to rotate to the fourth position D. The driving member 41 causes the tripping mechanism 3 to operate, driving the moving contact 2 to open. When the tripping member 42 rotates to the fourth position D, it will press against the first driving surface 411 of the driving member 41. Since the driving member 41 cannot move axially, under the action of the pressing force, the tripping member 42 and the driving member 41 will be axially misaligned, and the second elastic member will be compressed. The driving member 41 presses against the tripping member 42 and moves axially to the fifth position. Then the driving member 41 returns to the first position A, keeping the contact in the open state, that is... Figure 1 The state shown is as indicated. To close the circuit, activate the electromagnetic drive mechanism 43 again, allowing the drive component 41 to rotate to the second position B. This process enables a cyclical operation of opening and closing the circuit. The operation is automatic and requires no human intervention, featuring a simple and reliable structure and stable operation.

[0034] In some embodiments, the drive member 41 includes a drive base 412 and a drive disk 413 extending laterally from the drive base 412. A first drive surface 411 is disposed on the drive disk 413. The moving contact 2 is connected to the drive disk 413 via a connecting rod 5. When the drive member 41 rotates, it drives the moving contact 2 to swing.

[0035] Preferably, the drive disk 413 is a fan-shaped ring and is arranged along the outer periphery of the drive seat 412. The first drive surface 411 is formed on one end face of the drive disk 413. The connecting rod 5 can be connected to the other end of the drive disk 413. When the drive member 41 rotates, the drive disk 413 swings. The fan-shaped drive disk 413 allows the connecting rod 5 to swing a larger range and also makes it easier to control the swing of the contact.

[0036] In some embodiments, the tripping member 42 includes a rotating base 423 and a stop portion 424 and a drive portion 425 extending outward from the side of the rotating base 423. The rotating base 423 is the rotation center of the tripping member 42. The stop portion 424 and the drive portion 425 are circumferentially offset from each other in the tripping member 42. When the tripping member 42 rotates, the stop portion 424 and the drive portion 425 swing, thereby transmitting the force outward. Of course, the relative positions of the stop portion 424 and the drive portion 425 can also be adjusted according to the relative positions of the tripping mechanism 3 and the drive member 41.

[0037] The side of the abutment 424 opposite to the drive head 431 is the second drive surface 422. When the drive head 431 extends and abuts against the second drive surface 422 on the tripping member 42 located in the third position C, it drives the tripping member 42 to rotate towards the fourth position D. Further, after swinging to the fourth position D, the drive part 425 abuts against the tripping mechanism 3, driving the tripping mechanism 3 to swing, causing the moving contact 2 to swing and achieve tripping. The tripping mechanism is a rotatable armature or latch used to push the contacts to trip.

[0038] Meanwhile, the blocking part 424 is provided with an inclined guide surface 426 on the side away from the fifth position. When the release member 42 rotates to the fourth position D, under the action of the blocking force, the driving member 41 slides to the side of the blocking part 424 away from the fifth position and resets to the first position A. During the process of the driving member 41 resetting to the first position A, it generates a blocking force on the side where the guide surface 426 is located, which pushes the release member 42 to move axially to the fifth position.

[0039] Preferably, the rotation axes of the drive member 41 and the release member 42 are parallel. When the release member 42 is in the third position C, the abutment part 424 and the drive member 41 are axially intersected. The guide surface 426 is located on the side of the abutment part 424 close to the drive member 41. When the release member 42 turns to the fourth position D, the guide surface 426 presses against the drive member 41, so that the drive member 41 slides along the guide surface 426 to the side of the abutment part 424 away from the fifth position.

[0040] Preferably, the first driving surface 411 is an outwardly arched arc surface, and the outer end of the abutment 424 is provided with an arc-shaped chamfer on the side away from the driving head 431. When the release member 42 rotates to the fourth position D, the abutment 424 gradually increases its pressure on the driving member 41, allowing the release member 42 to slowly separate from the driving member. This facilitates the driving disc 413 to slide along the edge of the abutment 424 to the side of the abutment 424 away from the fifth position, thereby generating axial pressure on the release member 42.

[0041] In other embodiments, an inclined surface may be provided on the side of the first driving surface 411 near the fifth position, or the guide surface 426 and the inclined surface may be provided simultaneously. When the release member 42 presses against it, an axial force is generated on the release member 42, causing the abutting part 424 of the release member 42 to slide along the inclined surface on the first driving surface 411, thereby axially dislocating the release member 42 and the driving member 41. Alternatively, a guide structure may be provided to guide the axial movement of the release member 42 when it rotates to the fourth position D, thus dislocating it from the driving member 41.

[0042] In some embodiments, a connecting rod 5 may be provided to connect to the driving member 41 and extend the connecting rod 5 outside the housing 10. The contact can be closed by manually rotating the driving member 41.

[0043] Understandably, the above-mentioned technical features can be used in any combination without restriction.

[0044] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. An electric control mechanism for a circuit breaker, characterized in that, Includes a drive component (41), a trip component (42), an electromagnetic drive mechanism (43), and a reset mechanism; The driving member (41) is rotatably disposed between the first position (A) and the second position (B) to drive the moving contact (2) to close or open. The driving member (41) is provided with a first driving surface (411). The reset mechanism provides the driving member (41) with a reset force to reset to the first position (A). The tripping member (42) is rotatably disposed between the third position (C) and the fourth position (D), and can move axially between the third position (C) and the fifth position. The reset mechanism provides the tripping member (42) with a circumferential reset force to the third position (C) and an axial reset force to the third position (C). When the drive member (41) is in the first position (A), the moving contact (2) is open, and the tripping member (42) is in the fifth position, with the drive member (41) and the tripping member (42) being axially offset and abutting each other; The electromagnetic drive mechanism (43) includes a retractable drive head (431). The drive head (431) extends out and abuts against the first drive surface (411). When the drive member (41) is pushed to rotate to the second position (B), the moving contact (2) closes, and the tripping member (42) resets to the third position (C). When the drive head (431) drives the tripping member (42) to rotate to the fourth position (D), the tripping mechanism (3) drives the moving contact (2) to open, and the drive member (41) resets to the first position (A) and drives the tripping member (42) to move axially to the fifth position.

2. The electric control mechanism of the circuit breaker according to claim 1, characterized in that, The tripping member (42) is provided with a second driving surface (422) for the driving head (431) to press against, and a driving part (425) for driving the moving contact (2) to open. When the driving head (431) extends out and abuts against the second driving surface (422) on the tripping member (42) located in the third position (C), it drives the tripping member (42) to rotate to the fourth position (D). The driving part (425) abuts against the tripping mechanism (3), causing the moving contact (2) to open.

3. The electric control mechanism of the circuit breaker according to claim 2, characterized in that, The release member (42) includes a rotating seat (423) and a stop portion (424) extending outward from the side of the rotating seat (423), wherein the second driving surface (422) is located on the side of the stop portion (424) opposite to the driving head (431).

4. The electric control mechanism of the circuit breaker according to claim 3, characterized in that, The abutment (424) has an inclined guide surface (426) on the side away from the fifth position, and / or the first driving surface (411) has an inclined surface on the side near the fifth position, so that the driving member (41) can slide to the side of the abutment (424) away from the fifth position, press the release member (42) to the fifth position, and reset to the first position (A).

5. The electric control mechanism of the circuit breaker according to claim 4, characterized in that, The axes of the drive member (41) and the release member (42) are parallel. When the release member (42) is in the third position (C), the abutment (424) is offset from the drive member (41) in a plane. The guide surface (426) is located on the side of the abutment (424) close to the drive member (41). When the release member (42) turns to the fourth position (D), the guide surface (426) presses against the drive member (41), causing the drive member (41) to slide along the guide surface (426) to the side of the abutment (424) away from the fifth position.

6. The electric control mechanism of the circuit breaker according to claim 4, characterized in that, The first driving surface (411) is an outwardly arched arc surface, and the outer end of the blocking part (424) is provided with an arc-shaped chamfer on the side away from the driving head (431).

7. The electric control mechanism of the circuit breaker according to claim 3, characterized in that, The drive unit (425) extends outward from the side of the rotating seat (423) to drive the tripping mechanism (3) to swing and open the moving contact (2). The second drive surface (422) and the drive unit (425) are circumferentially offset from each other on the tripping member (42).

8. The electric control mechanism of the circuit breaker according to any one of claims 1 to 7, characterized in that, The drive unit (41) includes a drive seat (412) and a drive disk (413) extending laterally from the drive seat (412). The first drive surface (411) is disposed on the drive disk (413), and the moving contact (2) is connected to the drive disk (413) by a connecting rod.

9. The electric control mechanism of the circuit breaker according to claim 8, characterized in that, The drive disk (413) is fan-shaped and is arranged along the outer periphery of the drive seat (412). The first drive surface (411) is formed on one end face of the fan-shaped drive disk (413).

10. A circuit breaker, characterized in that, The circuit breaker includes an electric control mechanism as described in any one of claims 1 to 9, a moving contact (2), and a tripping mechanism (3), wherein the driving member (41) is connected to the moving contact (2) so that when rotating, it drives the moving contact (2) to swing, thereby achieving closing and opening.

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