Breaker on-off mechanism
By improving the structural design of the circuit breaker's switching mechanism, the final pressure and contact reliability are enhanced, the problem of poor contact between moving and stationary contacts is solved, the internal resistance and temperature rise are reduced, arcing is prevented, and the safety and reliability of the circuit breaker are improved.
Patent Information
- Application Number
- CN202520353353.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-28
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-02-28
AI Technical Summary
Traditional circuit breaker switching mechanisms suffer from insufficient final pressure and poor contact between moving and stationary contacts, leading to increased internal resistance, excessive temperature rise, and even arc discharge, which affects circuit safety.
By improving the structural design of the circuit breaker's switching mechanism and enhancing the final pressure, including by setting up an operating handle, rotary table, moving and stationary contacts, elastic elements, and locking structure, stable contact between the moving and stationary contacts is achieved. An automatic and manual unlocking mechanism using an electromagnet is adopted to improve contact reliability.
It significantly reduces internal resistance and temperature rise, prevents arcing, and improves the reliability and safety of circuit breakers.
Smart Images
Figure CN223927329U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of circuit breaker devices, and particularly relates to a circuit breaker on-off mechanism. BACKGROUND
[0002] In the power system, the circuit breaker is an indispensable electrical device, 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 traditional circuit breaker on-off mechanism has some defects in design, such as insufficient final pressure, poor contact between moving and static contacts, etc. These problems will cause the increase of internal resistance, the overheat, and even the arc discharge, which will pose a threat to the safe operation of the circuit. CONTENT OF THE UTILITY MODEL
[0003] In order to solve one of the technical problems in the prior art, the present application proposes a novel circuit breaker on-off mechanism, which realizes the strengthening of the 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 arc phenomenon.
[0004] The technical scheme adopted by the present application to solve its technical problems is: a circuit breaker on-off mechanism, comprising a shell, an operating handle and a rotating disc are arranged on the shell, the rotating disc is arranged inside the shell, at least part of the operating handle extends outside the shell, a first driving structure is arranged between the operating handle and the rotating disc, the operating handle drives the rotating disc to rotate through the first driving structure; a moving contact is arranged on the rotating disc, a static contact is arranged in the shell, at least one of the operating handle and the rotating disc and the rotating disc and the moving contact is provided with an elastic member; a moving iron core is movably arranged in the shell, the moving iron core is arranged close to the rotating disc, a third torsional spring is arranged on the moving iron core, the third torsional spring drives the moving iron core to move towards the rotating disc, a second locking structure is arranged between the moving iron core and the rotating disc; wherein when the operating handle drives the rotating disc to rotate in a 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 disc through the second locking structure.
[0005] In some embodiments of the present application, the first driving structure comprises a first groove opened on the operating handle, and a first protrusion arranged on the rotating disc, the first protrusion is arranged in the first groove, and the first protrusion is set to be movable relative to the first groove.
[0006] In some embodiments of the present application, the elastic member comprises a first compression spring arranged in the first groove, and two ends of the first compression spring abut against the first protrusion and the inner wall of the first groove, respectively.
[0007] In some embodiments of the present application, the second locking structure comprises a wedge-shaped protrusion arranged on the moving iron core and a locking groove arranged on the rotating disc; when the rotating disc rotates in a first direction to make the locking groove face 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, the operating handle is provided with an unlocking protrusion; when the operating handle is rotated in 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, the rotating disc is provided with a second groove, and the movable contact is embedded in the second groove, and at least part of the movable contact protrudes out of the rotating disc.
[0010] In some embodiments of the present application, the elastic member comprises a second compression spring arranged in the second groove, and two ends of the second compression spring abut against the movable contact and the inner wall of the second groove, respectively.
[0011] In some embodiments of the present application, the shell is further provided with a fixed iron core, the fixed iron core is an electromagnet, and the fixed iron core attracts the moving iron core after being electrified, so that the moving iron core is away from the rotating disc, thereby releasing the position locking of the rotating disc.
[0012] In some embodiments of the present application, the operating handle is provided with a first torsion spring for resetting.
[0013] In some embodiments of the present application, the rotating disc is provided with a second torsion spring for resetting.
[0014] By implementing the present application, the following beneficial effects are achieved: the present application proposes a novel circuit breaker on-off mechanism, through improving the structural design of the on-off mechanism, the final pressure is strengthened, and the contact effect of the movable and static contacts is effectively improved; this improvement not only significantly reduces the internal resistance and temperature rise, but also effectively prevents the occurrence of arc phenomenon at the initial contact, greatly improving the reliability and safety of the circuit breaker. BRIEF DESCRIPTION OF DRAWINGS
[0015] The present application will be further described below in combination with the drawings and embodiments, in which:
[0016] Figure 1 is a schematic view of the closed state of the circuit breaker on-off mechanism provided by the present application;
[0017] Figure 2 is Figure 1 is a schematic view of the open state of the on-off mechanism of the circuit breaker in
[0018] Figure 3 is a schematic view of the structure of the moving iron core;
[0019] Figure 4 is a schematic view of the structure of the rotating disc;
[0020] Figure 5 is a schematic view of the structure of the operating handle.
[0021] Brief Description of the Drawings:
[0022] fixed iron core 1, moving iron core 2, wedge-shaped protrusion 2-1, rotating disc 3, first protrusion 3-1, locking groove 3-2, second recess 3-3, operating handle 4, first recess 4-1, unlocking protrusion 4-2, first torsional spring 5, second torsional spring 6, moving contact 7, first compression spring 8, torsional spring 9, stationary contact 10, housing 11. DETAILED DESCRIPTION
[0023] In order to have a clearer understanding of the technical features, objectives and effects of the present application, the specific embodiments of the present application will be described in detail with reference to the accompanying drawings.
[0024] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.
[0025] In the description of the utility model, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" and the like can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.
[0026] In the description of the application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or chemical connection; it can be direct connection, or indirect connection through intermediate medium, or internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.
[0027] The application will be further described below with reference to the accompanying drawings Figures 1 to 5 The circuit breaker on-off mechanism of the application will be further described.
[0028] Referring to Figure 1 and Figure 2 Some embodiments of the application disclose a circuit breaker on-off mechanism, which comprises a shell 11, an operating handle 4 and a rotating disc 3 are arranged on the shell 11, the rotating disc 3 is arranged inside the shell 11, at least part of the operating handle 4 extends out of the shell 11, a first driving structure is arranged between the operating handle 4 and the rotating disc 3, the operating handle 4 drives the rotating disc 3 to rotate through the first driving structure; a moving contact 7 is arranged on the rotating disc 3, a stationary contact 10 is arranged in the shell 11, at least one of the operating handle 4 and the rotating disc 3 and the rotating disc 3 and the moving contact 7 is provided with an elastic member; a moving iron core 2 is movably arranged in the shell 11, the moving iron core 2 is arranged close to the rotating disc 3, a third torsional spring 9 is arranged on the moving iron core 2, the third torsional spring 9 drives the moving iron core 2 to move towards the rotating disc 3, a second locking structure is arranged between the moving iron core 2 and the rotating disc 3; wherein when the operating handle 4 drives the rotating disc 3 to rotate in a first direction, the moving contact 7 overcomes the elastic force of the elastic member and contacts the stationary contact 10, and then the moving iron core 2 locks the position of the rotating disc 3 through the second locking structure. The application improves the structural design of the circuit breaker on-off mechanism, increases the position locking of the rotating disc 3 by the moving iron core 2 on the premise that the rotating disc 3 overcomes the elastic force of the elastic member, realizes the strengthening of the final voltage, and effectively improves the contact effect of the moving and stationary contacts; this improvement not only significantly reduces the internal resistance and temperature rise, but also effectively prevents the occurrence of arc phenomenon at the initial contact, greatly improves the reliability and safety of the circuit breaker.
[0029] In some embodiments of the application, referring to Figure 4 and Figure 5, the first driving structure can include a first groove 4-1 formed on the operation handle 4, and a first protrusion 3-1 arranged on the rotating disc 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. Through the cooperation of the first protrusion 3-1 and the first groove 4-1, the operation handle 4 can drive the rotating disc 3. In addition, it is easily conceivable that in other embodiments, the positions of the first groove and the first protrusion can also be reversely arranged, that is, the first protrusion is arranged on the operation handle 4, and the first groove is arranged on the rotating disc 3, which can achieve the same effect.
[0030] In some embodiments of the present application, as shown in Figure 1 and Figure 2 , the elastic member includes a first compression spring 8 arranged in the first groove 4-1, and two ends of the first compression spring 8 abut against the first protrusion 3-1 and the inner wall of the first groove 4-1, respectively. The arrangement of the first compression spring 8 can provide elastic force, so that the contact between the movable contact 7 and the stationary contact 10 is more stable and reliable.
[0031] In some embodiments of the present application, as shown in Figure 3 and Figure 4 , the second locking structure includes a wedge-shaped protrusion 2-1 arranged on the movable iron core 2 and a locking groove 3-2 arranged on the rotating disc 3; when the rotating disc 3 rotates in the first direction to make the locking groove 3-2 directly face the wedge-shaped protrusion 2-1, the movable iron core 2 drives the wedge-shaped protrusion 2-1 to enter the locking groove 3-2 under the action of the torsion spring, thereby preventing the rotating disc 3 from rotating, and realizing the locking of the position of the rotating disc 3.
[0032] In some embodiments of the present application, as shown in Figure 5 , the operation handle 4 is provided with an unlocking protrusion 4-2; when the operation handle 4 is rotated in the second direction, the unlocking protrusion 4-2 will push the wedge-shaped protrusion 2-1 away from the locking groove 3-2; wherein the second direction is opposite to the first direction. By arranging the unlocking protrusion 4-2, when the operation handle 4 is reversely rotated, the unlocking protrusion 4-2 will push the wedge-shaped protrusion 2-1, so that the wedge-shaped protrusion 2-1 is away from the locking groove 3-2, thereby releasing the position locking of the rotating disc 3 by the movable iron core 2, and realizing the manual unlocking.
[0033] In some embodiments of the present application, as shown in Figure 4 , the rotating disc 3 is provided with a second groove 3-3, and the movable contact 7 is embedded in the second groove 3-3, and at least part of the movable contact 7 protrudes out of the rotating disc 3. Through the cooperation of the second groove 3-3 and the movable contact 7, the rotating disc 3 can drive the movable contact 7 to rotate together when the rotating disc 3 rotates.
[0034] In some embodiments of the present application, the elastic member can further include a second compression spring arranged in the second groove 3-3, and the two ends of the second compression spring abut against the dynamic contact 7 and the inner wall of the second groove 3-3, respectively. The arrangement of the second compression spring can provide elastic force, so that the contact between the dynamic contact 7 and the static contact 10 is more stable and reliable.
[0035] In some embodiments of the present application, referring to Figure 1 and Figure 2 , the housing 11 further comprises a fixed core 1, which is an electromagnet. As shown in Figure 2 , when the fixed core 1 is energized, the moving core 2 is attracted, so that the moving core 2 is away from the rotating disc 3, thereby releasing the position locking of the rotating disc 3, and achieving automatic unlocking.
[0036] In some embodiments of the present application, the operating handle 4 is provided with a first torsion spring 5 for resetting. After the rotating disc 3 is automatically unlocked by the fixed core 1, the operating handle 4 can be reset by the torsional force of the first torsion spring 5.
[0037] In some embodiments of the present application, the rotating disc 3 is provided with a second torsion spring 6 for resetting. After the rotating disc 3 is unlocked by manual or automatic means, the rotating disc 3 can be reset by the torsional force of the second torsion spring 6.
[0038] The breaker on-off mechanism of the present application is composed of moving and fixed cores, torsion springs, compression springs and the like, which enhances the effective contact of the breaker in on state, and the rapid breaking in off state. The mechanism is simple, the number of parts is small, and the function is reliable.
[0039] The working mode of the breaker on-off mechanism of the present application is as follows:
[0040] Manual closing: as shown in Figure 1 , the operating handle 4 is manually rotated in the first direction (counterclockwise), the first torsion spring 5 below the operating handle 4 is compressed, the first compression spring 8 is compressed, and the rotating disc 3 and the dynamic contact 7 rotate 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 touches the wedge-shaped protrusion 2-1 on the moving core 2, and pushes the moving core 2 to rotate towards the fixed core 1; before the operating handle 4 reaches the on position, the dynamic contact 7 has reached the on position, and as the operating handle 4 continues to move, the rotating disc 3 and the dynamic contact 7 continue to rotate against the elastic force to generate overtravel and contact pressure; because there is a third torsion spring 9 below the moving core 2, the moving core 2 is reset, and the wedge-shaped protrusion 2-1 locks the external locking groove 3-2 of the rotating disc 3, at this time the operating handle 4 reaches the on position, and the on action is completed.
[0041] Manual breaking: manual operation of the operating handle 4 rotates in the second direction (clockwise), the unlocking block 4-2 on the operating handle 4 pushes the wedge-shaped block 2-1 of the moving iron core 2, so that the moving iron core 2 moves towards the fixed iron core 1, the rotating disc 3 is released from the restriction of the moving iron core 2, the second torsion spring 6 of the rotating disc 3 is released, the first compression spring 8 is released, and the force generated during the release drives the moving contact 7 to quickly break.
[0042] Automatic circuit failure tripping: when the circuit breaker is in the on state, if the circuit is short-circuited at this time, the fixed iron core 1 is connected and a magnetic field is generated, the moving iron core 2 is attracted, the rotating disc 3 is released from the restriction of the moving iron core 2, the first torsion spring 5 below the operating handle 4 is released, the second torsion spring 6 of the rotating disc 3 is released, the first compression spring 8 is released, and the moving contact 7 is quickly broken.
[0043] It can be understood that the above embodiments only express the preferred embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as a limitation on the scope of the patent of the present application; it should be pointed out that for ordinary skilled in the art, the above-mentioned embodiments or technical features can be freely combined without departing from the concept of the present application, and several modifications and improvements can be made, which belong to the protection scope of the present application, that is, the embodiments described in "in some embodiments" can be freely combined with any of the above and below embodiments; therefore, any equivalent transformation and modification made to the scope of the claims of the present application shall belong to 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 disc (3) are arranged on the housing (11), the rotating disc (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 rotating disc (3), the operating handle (4) drives the rotating disc (3) to rotate through the first driving structure; a moving contact (7) is arranged on the rotating disc (3), a stationary contact (10) is arranged in the housing (11), at least one of the operating handle (4) and the rotating disc (3) and the rotating disc (3) and the moving contact (7) is provided with an elastic member; a moving iron core (2) is movably arranged in the housing (11), the moving iron core (2) is arranged close to the rotating disc (3), a third torsional spring (9) is arranged on the moving iron core (2), the third torsional spring (9) drives the moving iron core (2) to move towards the rotating disc (3), a second locking structure is arranged between the moving iron core (2) and the rotating disc (3); wherein, when the operating handle (4) drives the rotating disc (3) to rotate in a first direction, the moving contact (7) overcomes the elastic force of the elastic member and contacts the stationary contact (10), and then the moving iron core (2) locks the position of the rotating disc (3) through the second locking structure. The first driving structure comprises a first groove (4-1) opened on the operating handle (4) and a first protrusion (3-1) arranged on the rotating disc (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). The elastic member comprises a first compression spring (8) arranged in the first groove (4-1), both ends of the first compression spring (8) abut against the first protrusion (3-1) and the inner wall of the first groove (4-1) respectively. 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 disc (3); When the rotating disc (3) rotates in the first direction to make the locking groove (3-2) face 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 torsional spring (9).
2. The on-off mechanism of a circuit breaker according to claim 1, characterized in that, An unlocking protrusion (4-2) is arranged on the operating handle (4); 3. The on-off mechanism of a circuit breaker according to claim 2, characterized in that, When the operating handle (4) is rotated in a second direction, the unlocking protrusion (4-2) drives the wedge-shaped protrusion (2-1) to move away from the locking groove (3-2); wherein, the second direction is opposite to the first direction.
4. The circuit breaker on-off mechanism of claim 1, wherein, A second groove (3-3) is opened on the rotating disc (3), the moving contact (7) is embedded in the second groove (3-3), and at least part of the moving contact (7) extends outside the rotating disc (3). 5. The on-off mechanism of a circuit breaker according to claim 4, characterized in that, 6. The circuit breaker on-off mechanism of claim 1, wherein, 7. The on-off mechanism of a circuit breaker 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 abut against the moving contact (7) and the inner wall of the second groove (3-3) respectively.
8. The on-off mechanism of a circuit breaker according to any one of claims 1 to 7, characterized in that, The housing (11) is further provided with a fixed iron core (1), the fixed iron core (1) is an electromagnet, and the fixed iron core (1) is used for adsorbing the moving iron core (2) after being electrified, so that the moving iron core (2) is away from the rotating disc (3), thereby releasing the position locking of the rotating disc (3).
9. The on-off mechanism of a circuit breaker according to claim 8, characterized in that, The operating handle (4) is provided with a first torsion spring (5) for resetting.
10. The on-off mechanism of claim 8, wherein, The rotating disc (3) is provided with a second torsion spring (6) for resetting. The operating handle (4) is provided with a first torsion spring (5) for resetting. The rotating disc (3) is provided with a second torsion spring (6) for resetting.