Circuit breaker
By using the mechanical design of the closing push plate and the closing lock plate, the circuit breaker is prevented from closing again after being closed, thus solving the problem of the circuit breaker closing again after being closed. This achieves a simple structure and high reliability, and avoids damage to parts and safety hazards.
Patent Information
- Application Number
- CN202520249214.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-17
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2035-02-17
AI Technical Summary
Existing circuit breakers are prone to re-closing when receiving electrical signals again while in a closed state, leading to component damage and safety hazards. Furthermore, existing interlocking mechanisms are complex and have poor reliability.
The mechanical structure design of the closing push plate and the closing lock plate is adopted. The closing push plate is pushed by the auxiliary opening connecting plate to drive the closing lock plate to rotate, so that the closing lock plate is engaged with the closing half shaft to prevent the closing half shaft from rotating counterclockwise and avoid closing again after closing.
It effectively prevents the circuit breaker from being closed and then re-closed. It has a simple structure, high reliability, avoids damage to parts and safety hazards, and reduces structural complexity.
Smart Images
Figure CN223612344U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to medium voltage equipment technical field especially, relates to a circuit breaker. BACKGROUND
[0002] The circuit breaker usually includes a contact mechanism and an operating mechanism, the contact mechanism includes a moving contact and a stationary contact, and the operating mechanism includes a main shaft, a closing half shaft, a lock catch structure, an energy storage spring and an electromagnetic component. The stationary contact is fixed, the moving contact is connected with the main shaft, the main shaft rotates clockwise to drive the moving contact to contact the stationary contact, thereby realizing closing, and the main shaft rotates counterclockwise to drive the moving contact to separate from the stationary contact, thereby realizing opening. The energy storage spring can store energy under the action of a motor, and the energy stored in the energy storage spring is used to drive the main shaft to rotate from the open state to the closed state. The closing half shaft is connected with the energy storage spring through the lock catch structure, and the closing half shaft can rotate under the drive of the electromagnetic component to make the lock catch mechanism trip, thereby making the energy storage spring release energy. In summary, the closing principle of the circuit breaker is that after the electromagnetic component receives a closing electrical signal, the closing half shaft rotates counterclockwise, thereby making the lock catch structure trip, at this time, the energy stored in the energy storage spring is released and drives the main shaft to rotate clockwise, thereby switching the circuit breaker from the open state to the closed state. Then, the energy storage spring stores energy again, and the closing half shaft rotates clockwise under the action of the corresponding elastic component to reset.
[0003] When the circuit breaker is in the closed state, if the electromagnetic component receives an electrical signal again and drives the closing half shaft to rotate, the problem of closing again after closing will occur, thereby causing damage to parts and bringing safety hazards. In the related art, the circuit breaker is provided with a interlocking mechanism to prevent the circuit breaker from closing again after closing, but its structure is complex and the reliability is poor. UTILITY MODEL CONTENTS
[0004] The utility model aims at providing a circuit breaker, which can prevent the problem of closing again after closing, has simple structure and good reliability.
[0005] To achieve this purpose, the utility model adopts the following technical scheme:
[0006] The circuit breaker comprises a support, a moving contact, a static contact, a main shaft, a closing half shaft, a closing push plate, a closing lock plate and an auxiliary opening connecting plate; the main shaft is rotatably installed on the support and used to drive the moving contact to move to close or open the static contact; the closing half shaft is rotatably installed on the support and configured to trigger the main shaft to rotate from an open position to a closed position when rotating counterclockwise; the closing push plate is movable relative to the support; the closing lock plate is rotationally matched with the support and transmissionally connected with the closing push plate; the auxiliary opening connecting plate is connected with the main shaft; when the main shaft rotates from the open position to the closed position, the auxiliary opening connecting plate pushes the closing push plate to move and drives the closing lock plate to rotate, so that the closing lock plate is clamped with the closing half shaft.
[0007] As an optional solution, the circuit breaker further comprises a driving elastic member, one end of which is connected with the closing push plate and the other end of which is connected with the closing lock plate; the driving elastic member is configured to drive the closing lock plate to rotate to a position clamped with the closing half shaft when the closing push plate moves to the closed position.
[0008] As an optional solution, the circuit breaker further comprises a limiting member, which comprises a connecting part and a stop part; a first end of the connecting part is connected with the closing push plate and a second end of the connecting part penetrates through the closing lock plate; the stop part is connected with the second end of the connecting part and abuts against the closing lock plate in the closed state and the open state of the circuit breaker.
[0009] As an optional solution, the driving elastic member is a spring, which is sleeved on the connecting part.
[0010] As an optional solution, the circuit breaker further comprises a reset elastic member, one end of which is connected with the support and the other end of which is connected with the closing push plate; the reset elastic member is configured to drive the closing push plate to reset when the main shaft rotates from the closed position to the open position.
[0011] As an optional solution, one of the support and the closing push plate is provided with a guide groove and the other is provided with a guide column, the guide column is inserted into the guide groove and slidably matched with the guide groove.
[0012] As an optional solution, the auxiliary opening connecting plate is sleeved on the main shaft and configured as a non-circular shape, so as to have a gap with the closing push plate when the main shaft is in the open position and push the closing push plate to move when the main shaft is in the closed position.
[0013] As an optional scheme, the closing half shaft is provided with a protruding part on the peripheral surface, the closing lock plate is provided with a notch part, and the protruding part is clamped with the notch part when the main shaft is in the closing position.
[0014] As an optional scheme, the circuit breaker further comprises a housing, a chassis and a interlocking push rod; the support is mounted on the chassis, the chassis is capable of sliding relative to the housing to move between a working position and a rocked-out position; the interlocking push rod is movably connected with the chassis; when the chassis is away from the working position, the interlocking push rod pushes the closing push plate to move and drives the closing lock plate to rotate, so that the closing lock plate is clamped with the closing half shaft.
[0015] As an optional scheme, the interlocking push rod is in sliding fit with the chassis and the lower end is arranged below the chassis; the housing is provided with a boss part, and the boss part is located below the chassis; when the chassis is away from the working position, the boss part is supported on the lower end of the interlocking push rod, so that the interlocking push rod pushes the closing push plate.
[0016] The circuit breaker has the following beneficial effects:
[0017] In the process that the main shaft rotates from the opening position to the closing position, the auxiliary opening connecting plate rotates with the main shaft and pushes the closing push plate to move, the closing push plate drives the closing lock plate to rotate, so that the closing lock plate is clamped with the closing half shaft, when the circuit breaker is tried to be closed again due to misoperation, the closing half shaft cannot rotate, so that the main shaft cannot be further rotated to close, thereby avoiding the problem that the circuit breaker is closed again after being closed. The rotation of the closing push plate drives the rotation of the closing lock plate, so that the closing lock plate is clamped with the closing half shaft, the structure is simple and the reliability is high. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 is a partial structure schematic view of the circuit breaker provided by the embodiment of the utility model;
[0019] Figure 2 is a partial structure side view of the circuit breaker in the opening state provided by the embodiment of the utility model;
[0020] Figure 3 is a partial structure side view of the circuit breaker in the closing state provided by the embodiment of the utility model;
[0021] Figure 4 is Figure 1 the enlarged view of A in the figure;
[0022] Figure 5 is a partial structure side view of the circuit breaker in the rocking process provided by the embodiment of the utility model.
[0023] Fig.:
[0024] 1, support;
[0025] 2, main shaft;
[0026] 3, closing half shaft; 31, protruding part;
[0027] 41, closing push plate; 411, guide groove; 412, vertical part; 413, first horizontal part; 414, second horizontal part; 42, closing lock plate; 421, notch part; 422, avoiding hole; 43, auxiliary opening connecting plate; 44, driving elastic member; 45, limiting member; 451, connecting part; 452, stop part; 46, reset elastic member; 47, guide column;
[0028] 5, interlocking push rod;
[0029] 6, base plate;
[0030] 7, mounting frame. DETAILED DESCRIPTION
[0031] The utility model will be described in further detail below in combination with the drawings and examples. It can be understood that the specific examples described here are only for explaining the utility model, not limiting the utility model. In addition, it should be noted that, in order to facilitate the description, only the part related to the utility model is shown in the drawings, not all structures.
[0032] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0033] In the utility model, unless otherwise explicitly specified and limited, the first feature "on" or "below" the second feature can include that the first and second features are in direct contact, or it can include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.
[0034] In the description of the present embodiment, the terms "upper", "lower", "right", and the like, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.
[0035] As shown in Figures 1-3 The present embodiment provides a circuit breaker, which comprises a bracket 1, a moving contact, a static contact, a main shaft 2, a closing half shaft 3, a lock catch structure, an energy storage spring, a motor and an electromagnetic component. The static contact is connected with the bracket 1, the main shaft 2 is rotatably installed on the bracket 1, the moving contact is connected with the main shaft 2, when the main shaft 2 rotates in a first direction, it drives the moving contact to contact the static contact to realize closing, when the main shaft 2 rotates in a second direction, it drives the moving contact to separate from the static contact to realize opening. In the present embodiment, the first direction is clockwise direction, and the second direction is counterclockwise direction. The motor is used to store energy for the energy storage spring, and the energy stored by the energy storage spring is used to drive the main shaft 2 to rotate from the opening position to the closing position. The closing half shaft 3 is connected with the energy storage spring through the lock catch structure, when the closing half shaft 3 rotates in a preset direction (in the present embodiment, the preset direction is counterclockwise direction), the lock catch structure can be tripped, so that the energy storage spring releases energy to drive the main shaft 2 to rotate clockwise. The circuit breaker is also provided with a reset component, which is used to drive the closing half shaft 3 to rotate reversely (i.e. clockwise) and the lock catch structure to reengage after the energy storage spring releases energy. The electromagnetic component can receive an electric signal, and can output movement and push the closing half shaft 3 to rotate in the preset direction after receiving the electric signal. The specific structure of the lock catch structure and the energy storage spring is prior art, and will not be described here.
[0036] The closing principle of the circuit breaker is roughly as follows: manual operation or sending an electric signal to the electromagnetic component through electric control, the electromagnetic component receives the electric signal and outputs movement and pushes the closing half shaft 3 to rotate counterclockwise, so that the lock catch structure is tripped, the energy storage spring releases energy and drives the main shaft 2 to rotate clockwise, the main shaft 2 drives the moving contact to contact the static contact, thereby realizing the closing of the circuit breaker. After closing, the closing half shaft 3 rotates clockwise under the drive of the reset component and resets.
[0037] When the circuit breaker is in the closed state, if the electromagnetic component receives the electric signal again and pushes the closing half shaft 3 to rotate counterclockwise, the problem of closing again after closing will occur, thereby causing damage to parts and bringing safety hazards.
[0038] To this end, as shown in Figures 1-3As shown, the circuit breaker further comprises a closing push plate 41, a closing lock plate 42 and an auxiliary opening connecting plate 43. The closing push plate 41 is installed on the support 1 and can move relative to the support 1; the closing lock plate 42 is rotationally connected with the support 1 and is in transmission connection with the closing push plate 41; the auxiliary opening connecting plate 43 is connected with the main shaft 2. In the process that the main shaft 2 rotates from the open position to the closed position, the auxiliary opening connecting plate 43 rotates with the main shaft 2 and pushes the closing push plate 41 to move, the closing push plate 41 drives the closing lock plate 42 to rotate, so that the closing lock plate 42 is clamped with the closing half shaft 3. Therefore, when the electromagnetic member receives the electric signal again due to misoperation or other reasons and tries to close, the closing half shaft 3 cannot rotate counterclockwise, so that the lock catch structure cannot be released, the energy storage spring cannot release energy, and the main shaft 2 cannot rotate to close again, thereby avoiding the problem that the circuit breaker closes again after closing. And the rotation of the closing push plate 41 drives the rotation of the closing lock plate 42, so that the closing lock plate 42 is clamped with the closing half shaft 3, which is mechanically stopped, and the structure is simple and reliable.
[0039] In the embodiment, the closing push plate 41 is arranged above the main shaft 2 and can move relative to the support 1 in the vertical direction. The closing lock plate 42 is arranged above the closing push plate 41, one end of the closing lock plate 42 is pivotally connected with the support 1, and the other end is used for clamping with the closing half shaft 3. The closing half shaft 3 is arranged above the closing lock plate 42. As shown in Figure 2 As shown, when the circuit breaker is in the open state, the closing push plate 41 is located at the lower position, and the end of the closing lock plate 42 away from the pivot shaft inclines downward. Figure 3 As shown, when the main shaft 2 rotates clockwise and rotates from the open position to the closed position, the auxiliary opening connecting plate 43 pushes the closing push plate 41 to move upward, and the closing push plate 41 drives the closing lock plate 42 to rotate around the pivot shaft, so that the end of the closing push plate 41 away from the pivot shaft moves upward and clamps with the closing half shaft 3.
[0040] As shown in Figure 2 and Figure 3As shown, the auxiliary opening connecting plate 43 is sleeved on the main shaft 2 and configured as a non-circular shape. When the main shaft 2 is in the open position, the position with smaller radial dimension of the auxiliary opening connecting plate 43 is opposite to the closing push plate 41, so that there is a gap between the auxiliary opening connecting plate 43 and the closing push plate 41, which ensures that the closing push plate 41 remains in the lower position, and the closing lock plate 42 is not clamped with the closing half shaft 3, so that when the electromagnetic component receives an electrical signal, the closing half shaft 3 can rotate counterclockwise and release the energy of the energy storage spring to drive the main shaft 2 to close. When the main shaft 2 is in the closed position, the position with larger radial dimension of the auxiliary opening connecting plate 43 is rotated to be opposite to the closing push plate 41 and pushes the closing push plate 41 to move upward, thereby making the closing lock plate 42 clamped with the closing half shaft 3. Alternatively, the auxiliary opening connecting plate 43 is configured as a cam shape and can be connected with the main shaft 2 through a spline structure. The smooth connection of the cam shape can avoid excessive friction between the auxiliary opening connecting plate 43 and the closing push plate 41. In other embodiments, the shape of the auxiliary opening connecting plate 43 is not limited.
[0041] As shown in Figure 2 and Figure 3 , the closing half shaft 3 is provided with a protruding portion 31 on the peripheral surface, and the closing lock plate 42 is provided with a notch portion 421, and when the main shaft 2 is in the closed position, the protruding portion 31 is clamped with the notch portion 421. The clamping of the protruding portion 31 on the peripheral surface and the notch portion 421 can reliably stop the counterclockwise rotation of the closing half shaft 3, thereby reliably avoiding the situation of closing again after closing.
[0042] As shown in Figure 2 and Figure 3 , the circuit breaker further comprises a driving elastic member 44, one end of which is connected with the closing push plate 41 and the other end of which is connected with the closing lock plate 42. The driving elastic member 44 is configured to drive the closing lock plate 42 to rotate to the position clamped with the closing half shaft 3 when the closing push plate 41 moves to the closing position. When the closing push plate 41 moves upward, the driving elastic member 44 generates a certain compression amount and pushes the closing lock plate 42 to rotate clockwise around the pivot axis thereof, thereby ensuring that the end of the closing lock plate 42 away from the pivot axis moves upward and is clamped with the closing half shaft 3. As shown in Figure 4 , the closing push plate 41 comprises a first transverse portion 413, a vertical portion 412 and a second transverse portion 414, wherein the vertical portion 412 is substantially located in a vertical plane, the first transverse portion 413 is connected to the lower end of the vertical portion 412 and is substantially located in a horizontal plane, and the auxiliary opening connecting plate 43 can contact the first transverse portion 413 to push the entire closing push plate 41. The second transverse portion 414 is connected to the upper end of the vertical portion 412 and is substantially located in a horizontal plane, and the driving elastic member 44 is connected to the second transverse portion 414.
[0043] In order to ensure that the closing lock plate 42 can remain stable in position in the closed state and the open state of the circuit breaker, as shown in Figure 2 and Figure 3As shown, the circuit breaker further comprises a limiting member 45, which comprises a connecting portion 451 and a stop portion 452. The first end of the connecting portion 451 is connected with the closing push plate 41, and the second end penetrates the closing lock plate 42. The stop portion 452 is connected with the second end of the connecting portion 451, and abuts against the closing lock plate 42 in both the closing state and the opening state of the circuit breaker. In the embodiment, the connecting portion 451 is connected with the second transverse portion 414.
[0044] Specifically, as shown in Figure 2 the opening state of the circuit breaker, the driving elastic member 44 is in a slightly compressed state, thereby providing the closing push plate 41 with an upward pre-tightening force to prevent the closing lock plate 42 from rotating counterclockwise, and the stop portion 452 stops the closing lock plate 42 from rotating clockwise. In this way, the driving elastic member 44 cooperates with the limiting member 45 to keep the closing lock plate 42 stable in position in the opening state of the circuit breaker. In the process of switching the circuit breaker from the opening state to the closing state, the closing push plate 41 drives the driving elastic member 44 to provide the closing lock plate 42 with an upward force to make the closing lock plate 42 rotate clockwise to the position of being clamped with the closing half shaft 3. In this process, the compression amount of the driving elastic member 44 may first increase and then decrease, so the stop portion 452 does not always abut against the closing lock plate 42 in this process. As shown in Figure 3 the closing state of the circuit breaker, the driving elastic member 44 is still in a slightly compressed state, and provides the closing push plate 41 with an upward pre-tightening force to prevent the closing lock plate 42 from rotating counterclockwise, and the stop portion 452 stops the closing lock plate 42 from rotating clockwise. In this way, the driving elastic member 44 cooperates with the limiting member 45 to keep the closing lock plate 42 stable in position in the closing state of the circuit breaker. In the embodiment, the limiting member 45 can be integrally bent and formed with the closing push plate 41, or can be separately formed and then connected together. Figure 4 As shown, the connecting portion 451 and the stop portion 452 are arranged at an angle, and the closing lock plate 42 is provided with an avoiding hole 422, and the stop portion 452 penetrates the avoiding hole 422. The avoiding hole 422 is a long hole, thereby avoiding the interference between the rotating movement of the closing lock plate 42 and the movement of the limiting member 45.
[0045] As shown in Figure 4 the driving elastic member 44 is a spring, and the spring is sleeved on the connecting portion 451. In this way, the connecting portion 451 also limits the driving elastic member 44, thereby ensuring that the driving elastic member 44 can accurately drive the closing lock plate 42 to rotate.
[0046] As shown in Figure 4As shown, the circuit breaker further comprises a reset elastic member 46, one end of which is connected with the support 1 and the other end of which is connected with the closing push plate 41, and the reset elastic member 46 is configured to drive the closing push plate 41 to reset when the main shaft 2 rotates from the closing position to the opening position. When the circuit breaker switches from the closing state to the opening state, the main shaft 2 rotates counterclockwise, the auxiliary opening connecting plate 43 no longer contacts the closing push plate 41, and the reset elastic member 46 drives the closing push plate 41 to move downward to reset, and meanwhile the closing push plate 41 pulls the closing lock plate 42 downward through the stop portion 452 of the limiting member 45, so that the closing lock plate 42 rotates counterclockwise to reset, and the closing lock plate 42 is separated from the closing half shaft 3, thereby ensuring that the closing half shaft 3 can rotate counterclockwise and drive the main shaft 2 to rotate to close next time.
[0047] In this embodiment, the reset elastic member 46 can be a tension spring. When the circuit breaker is in the opening state, the tension spring is in the original length state. When the circuit breaker is in the closing state, the closing push plate 41 moves upward, and the tension spring stores energy. When the circuit breaker switches from the closing state to the opening state, the tension spring releases energy to drive the closing push plate 41 to move downward to reset.
[0048] As shown in the figure, Figure 4 One of the support 1 and the closing push plate 41 is provided with a guide groove 411, and the other is provided with a guide column 47, and the guide column 47 is inserted into and slidably connected with the guide groove 411. Through the cooperation of the guide column 47 and the guide groove 411, the moving direction of the closing push plate 41 can be ensured to be accurate, and the movement of the closing push plate 41 can also be limited. In this embodiment, two guide columns 47 are connected to the support 1 and extend in the horizontal direction, and two guide grooves 411 extending in the vertical direction are formed in the closing push plate 41, and each guide column 47 is inserted into one guide groove 411 and can slide in the corresponding guide groove 411. Through the cooperation of the two sets of guide columns 47 and guide grooves 411, the rotation of the closing push plate 41 during the lifting movement can be avoided, and the accuracy of the movement of the closing push plate 41 can be ensured. Figure 4 As shown in the figure,
[0049] In this embodiment, as shown in the figure, Figure 2 The circuit breaker further comprises a housing (not shown in the figure) and a bottom plate 6. The support 1 is mounted on the bottom plate 6, and the bottom plate 6 can slide relative to the housing to drive the support 1 and the components thereon to move between the working position and the rocked-out position. In this embodiment, when the bottom plate 6 is in the rocked-out position, the structure on the support 1 is at least partially located outside the housing, thereby facilitating the maintenance and repair of the circuit breaker by the operator.
[0050] In order to ensure the safety of the operator, the chassis 6 is required to be kept in the open state after leaving the working position, and for this purpose, as shown in Figure 2 and Figure 5 The circuit breaker further comprises a interlocking push rod 5 which is movably connected with the chassis 6. When the chassis 6 is in the working position, the interlocking push rod 5 does not contact with the closing push plate 41; when the chassis 6 moves from the working position to the swing-out position, the interlocking push rod 5 pushes the closing push plate 41 to move and drives the closing lock plate 42 to rotate, so that the closing lock plate 42 is clamped with the closing half shaft 3. Thus, even if the electromagnetic part receives the closing electric signal, the closing half shaft 3 cannot be rotated, that is, the closing cannot be performed, which ensures the safety of the operator. In summary, the circuit breaker of the embodiment realizes the structure of avoiding reclosing after closing and the structure of avoiding closing after the chassis 6 leaves the working position, which shares the closing push plate 41 and the closing lock plate 42, so that the overall structure is simple and the cost is low.
[0051] As shown in Figure 5 The interlocking push rod 5 is in sliding fit with the chassis 6 and the lower end is arranged below the chassis 6. The housing is provided with a boss portion which is located on the lower side of the chassis 6. When the chassis 6 is in the working position, the lower end of the interlocking push rod 5 does not cooperate with the boss portion, so that the upper end is in a lower position and does not contact with the closing push plate 41; when the chassis 6 leaves the working position and moves to the swing-out position, the interlocking push rod 5 moves with the chassis 6 and the lower end moves to the boss portion, the boss portion supports the lower end of the interlocking push rod 5, so that the interlocking push rod 5 moves upward and pushes the closing push plate 41, and then the closing lock plate 42 is clamped with the closing half shaft 3.
[0052] In the embodiment, the chassis 6 is connected with a mounting frame 7, the mounting frame 7 is provided with a guide hole, the interlocking push rod 5 passes through the guide hole and is in sliding fit with the mounting frame 7, so as to guide the movement of the interlocking push rod 5 and ensure the movement accuracy of the interlocking push rod 5, and then ensure the movement accuracy of the closing push plate 41 and the closing lock plate 42.
[0053] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not the limitation of the embodiments of the utility model. For ordinary skilled in the art, according to the idea of the utility model, the specific embodiments and application range can be changed, and the content of the specification should not be understood as the limitation of the utility model. Any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model claims.
Claims
1. A circuit breaker characterized by, The circuit breaker comprises a support (1), a moving contact, a static contact, a main shaft (2), a closing half shaft (3), a closing push plate (41), a closing lock plate (42) and an auxiliary opening connecting plate (43). The main shaft (2) is rotatably installed on the support (1) and used to drive the moving contact to move to close or open the static contact. The closing half shaft (3) is rotatably installed on the support (1) and configured to trigger the main shaft (2) to rotate from an open position to a closed position when rotating counterclockwise. The closing push plate (41) is movable relative to the support (1). The closing lock plate (42) is rotatably connected with the support (1) and drivingly connected with the closing push plate (41). The auxiliary opening connecting plate (43) is connected with the main shaft (2). When the main shaft (2) rotates from the open position to the closed position, the auxiliary opening connecting plate (43) pushes the closing push plate (41) to move and drives the closing lock plate (42) to rotate, so that the closing lock plate (42) is clamped with the closing half shaft (3).
2. The circuit breaker of claim 1, wherein, The circuit breaker further comprises a driving elastic member (44) having one end connected with the closing push plate (41) and the other end connected with the closing lock plate (42). The driving elastic member (44) is configured to drive the closing lock plate (42) to rotate to the position clamped with the closing half shaft (3) when the closing push plate (41) moves to the closed position.
3. The circuit breaker of claim 2, wherein, The circuit breaker further comprises a limiting member (45) comprising a connecting portion (451) and a stop portion (452). The first end of the connecting portion (451) is connected with the closing push plate (41), and the second end penetrates through the closing lock plate (42). The stop portion (452) is connected with the second end of the connecting portion (451). The stop portion (452) abuts against the closing lock plate (42) in the closed state and the open state of the circuit breaker.
4. The circuit breaker of claim 3, wherein, The driving elastic member (44) is a spring, and the spring is sleeved on the connecting portion (451).
5. The circuit breaker of claim 1, wherein, The circuit breaker further comprises a reset elastic member (46) having one end connected with the support (1) and the other end connected with the closing push plate (41). The reset elastic member (46) is configured to drive the closing push plate (41) to reset when the main shaft (2) rotates from the closed position to the open position.
6. The circuit breaker of claim 1, wherein, One of the support (1) and the closing push plate (41) is provided with a guide groove (411), and the other is provided with a guide column (47). The guide column (47) is inserted into and slidably connected with the guide groove (411).
7. The circuit breaker of claim 1, wherein, The auxiliary opening connecting plate (43) is sleeved on the main shaft (2) and configured as a non-circular shape. When the main shaft (2) is located at the open position, the auxiliary opening connecting plate (43) has a gap with the closing push plate (41). When the main shaft (2) is located at the closed position, the auxiliary opening connecting plate (43) pushes the closing push plate (41) to move.
8. The circuit breaker of claim 1, wherein, The closing half shaft (3) is provided with a protrusion (31) on the peripheral surface, and the closing lock plate (42) is provided with a notch (421), and when the main shaft (2) is in the closing position, the protrusion (31) is clamped with the notch (421).
9. The circuit breaker of any one of claims 1-8, wherein, The circuit breaker further comprises a shell, a chassis (6) and a interlocking push rod (5); the support (1) is installed on the chassis (6), the chassis (6) can slide relative to the shell to move between the working position and the swing-out position; the interlocking push rod (5) is movably connected with the chassis (6); when the chassis (6) is away from the working position, the interlocking push rod (5) pushes the closing push plate (41) to move and drives the closing lock plate (42) to rotate, so that the closing lock plate (42) is clamped with the closing half shaft (3).
10. The circuit breaker of claim 9, wherein, The interlocking push rod (5) is in sliding fit with the chassis (6) and the lower end is arranged below the chassis (6); the shell is provided with a boss portion, and the boss portion is located below the chassis (6); when the chassis (6) is away from the working position, the boss portion supports the lower end of the interlocking push rod (5), so that the interlocking push rod (5) pushes the closing push plate (41).