Breaker on-off mechanism

Abstract

The invention discloses a circuit breaker on-off mechanism which comprises a shell, an operation handle and a rotating disc are arranged on the shell, and the operation handle drives the rotating disc to rotate through a first driving structure; a moving contact is arranged on the rotating disc, a static contact is arranged in the shell, and an elastic piece is arranged between the operating handle and the rotating disc and / or between the rotating disc and the moving contact; a movable iron core is movably arranged in the shell, a third torsional spring is arranged on the movable iron core, the third torsional spring drives the movable iron core to move towards the direction of the turntable, and a second locking structure is arranged between the movable iron core and the turntable; when the operation handle drives the rotating disc to rotate, the moving contact overcomes the elastic force of the elastic piece and makes contact with the static contact, and the moving iron core locks the position of the rotating disc through the second locking structure. By improving the structure, the final pressure is strengthened, the contact effect of the movable contact and the static contact is effectively improved, the internal resistance and the temperature rise are remarkably reduced, the arc discharge phenomenon can be effectively prevented during initial contact, and the reliability and the safety of the circuit breaker are greatly improved.

Description

Technical Field

[0001] The present application relates to the technical field related to circuit breaker equipment, and in particular to a circuit breaker on-off mechanism. Background Art

[0002] In the power system, the circuit breaker is an indispensable electrical equipment, and its main function is to protect the circuit from abnormal conditions such as short circuit and overload. The on-off mechanism of the circuit breaker is its core component, which is responsible for controlling the on and off operations of the circuit breaker. The on-off mechanism of the traditional circuit breaker has some design defects, such as insufficient terminal pressure and poor contact between the moving and static contacts. These problems will lead to increased internal resistance and excessive temperature rise. In severe cases, they may even cause arc discharge, posing a threat to the safe operation of the circuit. Summary of the invention

[0003] In order to solve one of the technical problems existing in the prior art, the present application proposes a new type of circuit breaker on-off mechanism, which realizes the enhancement of final pressure by improving the structural design of the on-off mechanism, effectively improves the contact effect of the moving and static contacts, reduces the internal resistance and temperature rise, and effectively prevents the occurrence of arcing.

[0004] The technical solution adopted by the present application to solve the technical problem is: a circuit breaker on-off mechanism, comprising a housing, an operating handle and a rotating disk are arranged on the housing, the rotating disk is arranged inside the housing, at least part of the operating handle extends outside the housing, a first driving structure is arranged between the operating handle and the rotating disk, and the operating handle drives the rotating disk to rotate through the first driving structure; a moving contact is arranged on the rotating disk, a static contact is arranged in the housing, and at least one of the elastic member is arranged between the operating handle and the rotating disk and between the rotating disk and the moving contact; a moving iron core is movably arranged in the housing, the moving iron core is arranged close to the rotating disk, a third torsion spring is arranged on the moving iron core, the third torsion spring drives the moving iron core to move toward the rotating disk, and a second locking structure is arranged between the moving iron core and the rotating disk; wherein, when the operating handle drives the rotating disk to rotate in the first direction, the moving contact overcomes the elastic force of the elastic member and contacts the static contact, and then the moving iron core locks the position of the rotating disk through the second locking structure.

[0005] In some embodiments of the present application, the first driving structure includes a first groove opened on the operating handle, and a first protrusion arranged on the turntable, the first protrusion is arranged in the first groove, and the first protrusion is configured to be movable relative to the first groove.

[0006] In some embodiments of the present application, the elastic member includes a first compression spring disposed in the first groove, and two ends of the first compression spring respectively abut against the first protrusion and the inner wall of the first groove.

[0007] In some embodiments of the present application, the second locking structure includes a wedge-shaped protrusion arranged on the moving iron core and a locking groove arranged on the turntable; when the turntable rotates along a first direction so that the locking groove is opposite to the wedge-shaped protrusion, the moving iron core drives the wedge-shaped protrusion into the locking groove under the action of the torsion spring.

[0008] In some embodiments of the present application, an unlocking protrusion is provided on the operating handle; when the operating handle is rotated along a second direction, the unlocking protrusion pushes the wedge-shaped protrusion away from the locking groove; wherein the second direction is opposite to the first direction.

[0009] In some embodiments of the present application, a second groove is formed on the rotating disk, the moving contact is embedded in the second groove, and at least a portion of the moving contact extends out of the rotating disk.

[0010] In some embodiments of the present application, the elastic member includes a second compression spring disposed in the second groove, and two ends of the second compression spring respectively abut against the moving contact and an inner wall of the second groove.

[0011] In some embodiments of the present application, a fixed iron core is further provided in the shell, and the fixed iron core is an electromagnet. When energized, the fixed iron core absorbs the moving iron core, so that the moving iron core moves away from the turntable, thereby releasing the position lock of the turntable.

[0012] In some embodiments of the present application, a first torsion spring for resetting is provided on the operating handle.

[0013] In some embodiments of the present application, a second torsion spring for resetting is provided on the turntable.

[0014] The implementation of this application has the following beneficial effects: This application proposes a new on-off mechanism for a circuit breaker, which achieves the enhancement of the final pressure by improving the structural design of the on-off mechanism, and effectively improves the contact effect of the moving and static contacts; this improvement not only significantly reduces the internal resistance and temperature rise, but also can effectively prevent the occurrence of arcing during initial contact, greatly improving the reliability and safety of the circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present application will be further described below with reference to the accompanying drawings and embodiments, in which:

[0016] Figure 1 It is a schematic diagram of the closed state of the circuit breaker on-off mechanism provided by the present application;

[0017] Figure 2 yes Figure 1 A schematic diagram of the disconnected state of the circuit breaker on-off mechanism;

[0018] Figure 3 It is a schematic diagram of the structure of the moving iron core;

[0019] Figure 4 It is a schematic diagram of the structure of the turntable;

[0020] Figure 5 It is a structural diagram of the operating handle.

[0021] Description of Figure Numbers:

[0022] Fixed iron core 1, moving iron core 2, wedge-shaped protrusion 2-1, turntable 3, first protrusion 3-1, locking groove 3-2, second groove 3-3, operating handle 4, first groove 4-1, unlocking protrusion 4-2, first torsion spring 5, second torsion spring 6, moving contact 7, first compression spring 8, torsion spring 9, static contact 10, housing 11. DETAILED DESCRIPTION

[0023] In order to have a clearer understanding of the technical features, purposes and effects of the present application, the specific implementation methods of the present application are now described in detail with reference to the accompanying drawings.

[0024] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0025] In the description of the invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, "multiple" means two or more.

[0026] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or a chemical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood by specific circumstances.

[0027] The following is combined with Figures 1 to 5 , the circuit breaker on-off mechanism of the present application is further explained.

[0028] See also Figure 1 and Figure 2 Some embodiments of the present application disclose a circuit breaker on-off mechanism, including a housing 11, an operating handle 4 and a turntable 3 are arranged on the housing 11, the turntable 3 is arranged inside the housing 11, at least part of the operating handle 4 extends outside the housing 11, a first driving structure is arranged between the operating handle 4 and the turntable 3, and the operating handle 4 drives the turntable 3 to rotate through the first driving structure; a moving contact 7 is arranged on the turntable 3, a static contact 10 is arranged in the housing 11, and at least one elastic member is arranged between the operating handle 4 and the turntable 3, and between the turntable 3 and the moving contact 7; a moving iron core 2 is movably arranged in the housing 11, the moving iron core 2 is arranged close to the turntable 3, a third torsion spring 9 is arranged on the moving iron core 2, the third torsion spring 9 drives the moving iron core 2 to move in the direction of the turntable 3, and a second locking structure is arranged between the moving iron core 2 and the turntable 3; wherein, when the operating handle 4 drives the turntable 3 to rotate in the first direction, the moving contact 7 overcomes the elastic force of the elastic member and contacts the static contact 10, and then the moving iron core 2 locks the position of the turntable 3 through the second locking structure. The present application improves the structural design of the circuit breaker on-off mechanism, adds a moving iron core 2 to lock the position of the turntable 3 under the premise that the turntable 3 overcomes the elastic force of the elastic member, thereby strengthening the final pressure and effectively improving the contact effect of the moving and static contacts; this improvement not only significantly reduces the internal resistance and temperature rise, but also can effectively prevent the occurrence of arcing during initial contact, thereby greatly improving the reliability and safety of the circuit breaker.

[0029] In some embodiments of the present application, reference Figure 4 and Figure 5, the first driving structure may include a first groove 4-1 provided on the operating handle 4, and a first convex block 3-1 provided on the turntable 3, the first convex block 3-1 being provided in the first groove 4-1, and the first convex block 3-1 being configured to be movable relative to the first groove 4-1. Through the cooperation between the first convex block 3-1 and the first groove 4-1, the operating handle 4 can drive the turntable 3. In addition, it is easy to imagine that in other embodiments, the positions of the first groove and the first convex block may be reversed, that is, the first convex block is provided on the operating handle 4, and the first groove is provided on the turntable 3, which may achieve the same effect.

[0030] In some embodiments of the present application, Figure 1 and Figure 2 As shown, the elastic member includes a first compression spring 8 disposed in the first groove 4-1, and the two ends of the first compression spring 8 respectively abut against the first protrusion 3-1 and the inner wall of the first groove 4-1. The first compression spring 8 can provide elastic force, so that the contact between the moving contact 7 and the stationary contact 10 is more stable and reliable.

[0031] In some embodiments of the present application, Figure 3 and Figure 4 As shown, the second locking structure includes a wedge-shaped protrusion 2-1 arranged on the moving iron core 2 and a locking groove 3-2 arranged on the turntable 3; when the turntable 3 rotates along the first direction so that the locking groove 3-2 is opposite to the wedge-shaped protrusion 2-1, the moving iron core 2 drives the wedge-shaped protrusion 2-1 into the locking groove 3-2 under the action of the torsion spring, thereby preventing the turntable 3 from rotating, thereby locking the position of the turntable 3.

[0032] In some embodiments of the present application, Figure 5 As shown, the operating handle 4 is provided with an unlocking protrusion 4-2; when the operating handle 4 is rotated in the second direction, the unlocking protrusion 4-2 pushes the wedge-shaped protrusion 2-1 away from the locking groove 3-2; wherein the second direction is opposite to the first direction. By providing the unlocking protrusion 4-2, when the operating handle 4 is rotated in the reverse direction, the unlocking protrusion 4-2 will push the wedge-shaped protrusion 2-1 away from the locking groove 3-2, thereby releasing the position locking of the moving iron core 2 on the rotating disk 3, and realizing manual unlocking.

[0033] In some embodiments of the present application, Figure 4 As shown, the rotating disk 3 is provided with a second groove 3-3, and the moving contact 7 is embedded in the second groove 3-3, and at least part of the moving contact 7 extends out of the rotating disk 3. Through the cooperation between the second groove 3-3 and the moving contact 7, the moving contact 7 can be driven to rotate together when the rotating disk 3 rotates.

[0034] In some embodiments of the present application, the elastic member may further include a second compression spring disposed in the second groove 3-3, and the two ends of the second compression spring respectively abut against the moving contact 7 and the inner wall of the second groove 3-3. The second compression spring may provide elastic force, thereby making the contact between the moving contact 7 and the static contact 10 more stable and reliable.

[0035] In some embodiments of the present application, reference Figure 1 and Figure 2 The housing 11 is also provided with a fixed iron core 1, which is an electromagnet. Figure 2 As shown, after the fixed iron core 1 is energized, it attracts the moving iron core 2, so that the moving iron core 2 is away from the turntable 3, thereby releasing the position lock of the turntable 3 and realizing automatic unlocking.

[0036] In some embodiments of the present application, a first torsion spring 5 for resetting is provided on the operating handle 4 . When the turntable 3 is automatically unlocked by the fixed iron core 1 , the operating handle 4 can be reset by the torque of the first torsion spring 5 .

[0037] In some embodiments of the present application, a second torsion spring 6 for resetting is provided on the turntable 3 . When the turntable 3 is unlocked manually or automatically, the turntable 3 can be reset by the torque of the second torsion spring 6 .

[0038] The circuit breaker on-off mechanism of the present application is composed of simple parts such as a moving and fixed iron core, a torsion spring, and a compression spring, which enhances the effective contact of the circuit breaker when it is connected, and the rapid disconnection when it is disconnected. It has a simple structure, a small number of parts, and reliable functions.

[0039] The working mode of the circuit breaker on-off mechanism of the present application is as follows:

[0040] Manual closing: Figure 1 As shown, the manually operated operating handle 4 rotates in a first direction (counterclockwise), the first torsion spring 5 under the operating handle 4 is compressed, the first compression spring 8 is compressed, and the turntable 3 and the moving contact 7 rotate along with the operating handle 4; during the rotation of the operating handle 4 in the first direction, the unlocking protrusion 4-2 of the operating handle 4 contacts the wedge-shaped protrusion 2-1 on the moving iron core 2, pushing the moving iron core 2 to rotate toward the fixed iron core 1; before the operating handle 4 reaches the connected position, the moving contact 7 has reached the connected position, and as the operating handle 4 continues to move, the turntable 3 and the moving contact 7 overcome the elastic force of the elastic member and continue to rotate to generate overtravel and contact pressure; because there is a third torsion spring 9 under the moving iron core 2, the moving iron core 2 is reset, and the wedge-shaped protrusion 2-1 jams the external locking groove 3-2 of the turntable 3, at which time the operating handle 4 reaches the connected position and the connection action is completed.

[0041] Manual disconnection: The manually operated operating handle 4 is rotated in the second direction (clockwise), and the unlocking protrusion 4-2 on the operating handle 4 pushes the wedge-shaped protrusion 2-1 of the moving iron core 2, so that the moving iron core 2 moves toward the fixed iron core 1, and the turntable 3 is freed from the restriction of the moving iron core 2. The second torsion spring 6 of the turntable 3 is released, and the first compression spring 8 is released. The force generated during the release drives the moving contact 7 to disconnect quickly.

[0042] Automatic tripping due to circuit fault: When the circuit breaker is in the on state, if the circuit is short-circuited, the fixed iron core 1 is connected and generates a magnetic field, attracting the moving iron core 2, and the turntable 3 is free from the restriction of the moving iron core 2. The first torsion spring 5 under the operating handle 4 is released, the second torsion spring 6 of the turntable 3 is released, and the first compression spring 8 is released, driving the moving contact 7 to quickly disconnect.

[0043] It can be understood that the above embodiments only express the preferred implementation methods of the present application, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present application; it should be pointed out that for ordinary technicians in this field, without departing from the concept of the present application, the above embodiments or technical features can be freely combined, and several deformations and improvements can be made, which all belong to the protection scope of the present application, that is, the embodiments described in "some embodiments" can be freely combined with any of the above and below embodiments; therefore, all equivalent changes and modifications made to the scope of the claims of the present application should fall within the scope of the claims of the present application.

Claims

1. A circuit breaker on-off mechanism, comprising a housing (11), characterized in that: An operating handle (4) and a rotating disk (3) are arranged on the housing (11); the rotating disk (3) is arranged inside the housing (11); at least a portion of the operating handle (4) extends outside the housing (11); a first driving structure is arranged between the operating handle (4) and the rotating disk (3); the operating handle (4) drives the rotating disk (3) to rotate through the first driving structure; The rotating disk (3) is provided with a moving contact (7), the housing (11) is provided with a stationary contact (10), and at least one elastic member is provided between the operating handle (4) and the rotating disk (3), and between the rotating disk (3) and the moving contact (7); A moving iron core (2) is movably arranged in the housing (11), the moving iron core (2) is arranged close to the rotating disk (3), a third torsion spring (9) is arranged on the moving iron core (2), the third torsion spring (9) drives the moving iron core (2) to move in the direction of the rotating disk (3), and a second locking structure is arranged between the moving iron core (2) and the rotating disk (3); When the operating handle (4) drives the rotating disk (3) to rotate in a first direction, the moving contact (7) overcomes the elastic force of the elastic member and contacts the static contact (10), and then the moving iron core (2) locks the position of the rotating disk (3) through the second locking structure.

2. The circuit breaker on-off mechanism according to claim 1, characterized in that: The first driving structure comprises a first groove (4-1) formed on the operating handle (4), and a first protrusion (3-1) arranged on the rotating disk (3); the first protrusion (3-1) is arranged in the first groove (4-1), and the first protrusion (3-1) is configured to be movable relative to the first groove (4-1).

3. The circuit breaker on-off mechanism according to claim 2, characterized in that: The elastic member comprises a first compression spring (8) arranged in the first groove (4-1), and two ends of the first compression spring (8) respectively abut against the first protrusion (3-1) and the inner wall of the first groove (4-1).

4. The circuit breaker on-off mechanism according to claim 1, characterized in that: The second locking structure comprises a wedge-shaped protrusion (2-1) arranged on the moving iron core (2) and a locking groove (3-2) arranged on the rotating disk (3); When the rotating disk (3) rotates in a first direction so that the locking groove (3-2) faces the wedge-shaped protrusion (2-1), the moving iron core (2) drives the wedge-shaped protrusion (2-1) to enter the locking groove (3-2) under the action of the third torsion spring (9).

5. The circuit breaker on-off mechanism according to claim 4, characterized in that: The operating handle (4) is provided with an unlocking protrusion (4-2); When the operating handle (4) is rotated in a second direction, the unlocking protrusion (4-2) pushes the wedge-shaped protrusion (2-1) away from the locking groove (3-2); wherein the second direction is opposite to the first direction.

6. The circuit breaker on-off mechanism according to claim 1, characterized in that: The rotating disk (3) is provided with a second groove (3-3), the moving contact (7) is embedded in the second groove (3-3), and at least part of the moving contact (7) extends out of the rotating disk (3).

7. The circuit breaker on-off mechanism according to claim 6, characterized in that: The elastic member comprises a second compression spring arranged in the second groove (3-3), and two ends of the second compression spring respectively abut against the moving contact (7) and the inner wall of the second groove (3-3).

8. The circuit breaker on-off mechanism according to any one of claims 1 to 7, characterized in that: A fixed iron core (1) is also provided in the housing (11). The fixed iron core (1) is an electromagnet. When energized, the fixed iron core (1) absorbs the moving iron core (2) so that the moving iron core (2) moves away from the turntable (3), thereby releasing the position lock of the turntable (3).

9. The circuit breaker on-off mechanism according to claim 8, characterized in that: The operating handle (4) is provided with a first torsion spring (5) for resetting.

10. The circuit breaker on-off mechanism according to claim 8, characterized in that: The rotating disk (3) is provided with a second torsion spring (6) for resetting.

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