Circuit breaker anti-rebound device and operating mechanism
By designing a circuit breaker anti-resistance device including fixed shaft, cantilever, limit shaft and lock, the problems of complex structure and complex disassembly and assembly processes of the existing device are solved, and efficient anti-resistance effect and simplified production process are achieved.
Patent Information
- Application Number
- CN202421459487.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-24
- Publication Date
- 2025-04-01
- Estimated Expiration
- 2034-06-24
AI Technical Summary
The existing circuit breaker anti-resistance device has a complex structure and a complicated disassembly and assembly process, which affects production efficiency.
A circuit breaker anti-resistance device is designed, including a fixed shaft, cantilever, limit shaft and lock buckle. The lock buckle is driven to rotate through the impact contact between the lock buckle and the fixed shaft. The lock groove of the lock buckle hooks the fixed shaft to limit the rotation movement of the cantilever and achieve an anti-resistance effect.
It effectively limits the rebound of the cantilever, improves the reliability of the anti-recovery function, reduces the dependence on the force value of the torsion spring, simplifies the adjustment and replacement process of the torsion spring, and improves production efficiency.
Smart Images
Figure CN222705417U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of circuit breaker equipment, in particular to a circuit breaker anti-rebound device and an operating mechanism. Background Art
[0002] Circuit breakers are commonly used in low-voltage power distribution systems to connect and disconnect loads and protect the safety of lines and equipment. They belong to the category of low-voltage electrical appliances.
[0003] The operating mechanism of the universal circuit breaker is connected to the moving contact through a rotating shaft. During the closing and opening process, the operating mechanism drives the rotating shaft to rotate, thereby driving the moving contact to rotate, so that the moving and static contacts are in contact or separation state, thereby realizing the connection and disconnection of the circuit by the circuit breaker.
[0004] During the short-circuit breaking process of the circuit breaker, a large electric repulsion force is generated due to the large current, which accumulates a large amount of kinetic energy and momentum, causing the moving contact to move very quickly, driving the rotating shaft of the circuit breaker operating mechanism to rotate quickly. However, the materials of the circuit breaker operating mechanism are all rigid materials, which are not conducive to absorbing the kinetic energy generated when the moving contact is opened quickly. After the rotating shaft collides with the limiting metal structure, it will rebound, which will reduce the opening distance of the moving contact and make it difficult to extinguish or reignite the arc, eventually causing serious consequences and causing the circuit breaker to be scrapped.
[0005] For example, in the prior patent - CN 215731545U - Patent Name: Anti-rebound mechanism of circuit breaker and circuit breaker, an anti-rebound mechanism is designed and added in the patent, but the anti-rebound mechanism of this structure is greatly affected by the torsion spring. If the elastic coefficient of the torsion spring is too high (the torsion spring is too tight), the inertial swing of the buckle plate 4 cannot overcome the torsion of the torsion spring with too high elastic coefficient, and it is not easy to swing enough to make the anti-rebound function invalid; if the elastic coefficient of the torsion spring is too low (the torsion spring is too loose), the buckle plate will not be reset in time, which will limit the subsequent reclosing process of the cantilever. Therefore, when producing products, it is often necessary to adjust and replace the torsion spring many times, but the disassembly and assembly process of the torsion spring is relatively complicated, which affects the production efficiency. Utility Model Content
[0006] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a circuit breaker anti-rebound device and an operating mechanism to solve the problem that the circuit breaker anti-rebound device has a complex structure and a complex disassembly and assembly process, which affects the production efficiency.
[0007] The technical solution adopted by the utility model to solve its technical problems is:
[0008] First aspect:
[0009] Provided is a circuit breaker anti-rebound device, comprising a fixed shaft, a cantilever, a limit shaft and a lock;
[0010] The cantilever is connected to the main shaft of the circuit breaker operating mechanism and performs synchronous opening and closing rotation;
[0011] The fixed shaft is fixedly arranged on the circuit breaker operating mechanism;
[0012] The lock buckle is elastically rotatably arranged on the cantilever, and the limit shaft is fixed on the cantilever;
[0013] The lock buckle is provided with a lock groove and a first stop groove, and the cantilever is provided with a second stop groove; when the lock buckle is in an elastic reset state, the lock buckle abuts against the limit shaft, and the first stop groove of the lock buckle protrudes from the second stop groove;
[0014] When opening the gate, the main shaft drives the cantilever to rotate to open the gate, and the first stop groove of the lock buckle first collides with the fixed shaft, thereby driving the lock buckle to rotate on the cantilever, so that the lock groove of the lock buckle hooks the fixed shaft to limit the cantilever from rotating; after the cantilever rebound action is completed, the lock buckle starts to perform elastic reset, and the lock groove disengages from the fixed shaft.
[0015] Furthermore, a rotating shaft is fixedly arranged on the cantilever, and the locking buckle is sleeved on the rotating shaft;
[0016] A torsion spring is sleeved on the rotating shaft, one end of the torsion spring abuts against the limiting shaft, and the other end abuts against the lock buckle.
[0017] Furthermore, the fixed shaft is a rigid part, and its shape is round or square.
[0018] Furthermore, the limiting shaft and the cantilever are connected by threading, riveting or welding.
[0019] Second aspect:
[0020] An operating mechanism is provided, on which at least one set of the circuit breaker anti-rebound device is installed.
[0021] Furthermore, the fixing shaft of the circuit breaker anti-rebound device is arranged on the side plate of the operating mechanism.
[0022] The beneficial effects of the utility model are:
[0023] The utility model discloses an anti-rebound device and operating mechanism for a circuit breaker. When the mechanism is in the opening state, the lock on the cantilever can first collide with the fixed shaft, prompting the lock to rotate so that the lock of the lock hooks the fixed shaft, thereby making the cantilever connected to the lock unable to rotate, effectively limiting its rebound, getting rid of the traditional anti-rebound structure's reliance on inertia force, and improving the reliability of the anti-rebound function.
[0024] In the circuit breaker anti-rebound device of the utility model, the torsion spring only needs to provide the restoring force of the lock, and the force value of the torsion spring is not highly sensitive to the effectiveness of the anti-rebound function, thereby solving the pain point of frequent adjustment or even replacement of the torsion spring of the traditional anti-rebound structure. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] The utility model is further described below in conjunction with the accompanying drawings.
[0026] Figure 1 It is a schematic diagram of the circuit breaker anti-rebound device of the utility model when it is in the closed position;
[0027] Figure 2 It is a schematic diagram of the first stop groove of the circuit breaker anti-rebound device of the utility model hitting the fixed shaft;
[0028] Figure 3 It is a schematic diagram of the circuit breaker anti-rebound device of the utility model in the state where the lock hooks the fixed shaft;
[0029] Figure 4 It is a schematic diagram of the lock being reset on the cantilever after the rebound is completed;
[0030] Among them, 1. main shaft, 2. cantilever, 21. second stop groove, 3. lock buckle, 31. lock groove, 32. first stop groove, 4. limit shaft, 5. rotating shaft, 6. torsion spring, 7. fixed shaft, 8. side plate. DETAILED DESCRIPTION
[0031] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0032] The present application provides a circuit breaker anti-rebound device and an operating mechanism, which are described in detail below. It should be noted that the description order of the following embodiments does not limit the preferred order of the embodiments of the present application. In the following embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.
[0033] In order to solve the technical problem that the circuit breaker anti-rebound device in the prior art has a complex structure and a complex disassembly and assembly process, which affects the production efficiency, an embodiment of the present application provides a circuit breaker anti-rebound device and an operating mechanism, which are described in detail below.
[0034] like Figures 1 to 4As shown, a circuit breaker anti-rebound device includes a fixed shaft 7, a cantilever 2, a limit shaft 4 and a lock 3;
[0035] The cantilever 2 is connected to the main shaft 1 of the circuit breaker operating mechanism and performs synchronous opening and closing rotation;
[0036] The fixed shaft 7 is fixedly arranged on the circuit breaker operating mechanism;
[0037] The lock buckle 3 is elastically rotatably arranged on the cantilever 2, and the limit shaft 4 is fixed on the cantilever 2;
[0038] The lock buckle 3 is provided with a lock groove 31 and a first stop groove 32, and the cantilever 2 is provided with a second stop groove 21; when the lock buckle 3 is in an elastic reset state, the lock buckle 3 abuts against the limit shaft 4, and the first stop groove 32 of the lock buckle 3 protrudes from the second stop groove 21;
[0039] When opening the gate, the main shaft 1 drives the cantilever 2 to rotate to open the gate, and the first stop groove 32 of the lock buckle 3 first collides with the fixed shaft 7, thereby driving the lock buckle 3 to rotate on the cantilever 2, so that the lock groove 31 of the lock buckle 3 hooks the fixed shaft 7 to limit the cantilever 2 from rotating; after the cantilever 2 rebounds, the lock buckle 3 starts to perform elastic reset, and the lock groove 31 disengages from the fixed shaft 7.
[0040] Specifically, as an optional implementation in this embodiment, a rotating shaft 5 is fixedly provided on the cantilever 2, and the lock buckle 3 is sleeved on the rotating shaft 5;
[0041] The rotating shaft 5 is sleeved with a torsion spring 6 , one end of the torsion spring 6 abuts against the limiting shaft 4 , and the other end abuts against the lock buckle 3 .
[0042] The force of the torsion spring 6 can make the lock catch 3 rotate clockwise until it is close to the limit shaft 4. When the gate is opened, the cantilever 2, the limit shaft 4, the rotating shaft 5, the lock catch 3, and the torsion spring 6 all rotate clockwise around the axis of the main shaft 1.
[0043] In this embodiment, in addition to using the torsion spring 6 to drive the lock buckle 3 to perform elastic rotation, elastic elements such as tension springs and hairsprings may also be used.
[0044] In this embodiment, the lock buckle 3 is axially limited on the rotating shaft 5 by, but not limited to, an open retaining ring, a shaft retaining ring, a cotter pin or a nut.
[0045] Specifically, as an optional implementation in this embodiment, the fixed shaft 7 is a rigid member, and its shape is round or square.
[0046] Specifically, as an optional implementation in this embodiment, the limiting shaft 4 and the cantilever 2 are connected by threading, riveting or welding.
[0047] The utility model provides an operating mechanism, on which at least one group of anti-rebound devices for the circuit breaker is installed.
[0048] Specifically, as an optional implementation in this embodiment, the fixed shaft 7 of the circuit breaker anti-rebound device is arranged on the side plate 8 of the operating mechanism.
[0049] The actual number of circuit breaker anti-rebound devices used on the operating mechanism is determined according to the actual situation of the user.
[0050] like Figure 1 Figure 2 As shown, the lock buckle 3 is provided with a lock groove 31 and a first stop groove 32. Under the action of the torsion spring 6, the bottom surface of the first stop groove 32 protrudes from the second stop groove 21 of the lower cantilever 2. During the opening process, the first stop groove 32 first contacts the fixed shaft 7, and the impact causes the lock buckle 3 to rotate rapidly counterclockwise around the rotating shaft 5 as shown in the figure.
[0051] like Figure 3 As shown, the lock buckle 3 rotates counterclockwise until the lock groove 31 hooks the fixed shaft 7. After a very short time difference, the second stop groove 21 of the cantilever 2 begins to contact the fixed shaft 7. The impact reaction force forces the cantilever 2 to rebound counterclockwise, but because the cantilever 2 and the lock buckle 3 are connected together through the rotating shaft 5, the lock buckle 3 is restricted by the fixed shaft 7 at this time, and then the lock buckle 3 restricts the rotational movement of the cantilever 2, thereby playing an anti-rebound role.
[0052] like Figure 4 After the rebound ends, the lock buckle 3 rotates clockwise under the action of the torsion spring 6 to disengage and unlock from the fixed shaft 7 until the first stop groove 32 of the lock buckle 3 contacts the fixed shaft 7 and stops rotating. At this time, due to the action of the reset spring of the operating mechanism, the second stop groove 21 of the cantilever 2 is also in a state of contacting the fixed shaft 7, indicating that the switch is in place and the mechanism shaft is in a normal state ready for the next closing.
[0053] The various devices selected in this application (components whose specific structures are not described) are all universal standard parts or components known to technical personnel in this field, and their structures and principles can be known to technical personnel through technical manuals or through conventional experimental methods.
[0054] In the description of the embodiments of the present invention, 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 an electrical connection; it can be a direct connection, or it can be indirectly connected 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 the present invention can be understood according to specific circumstances.
[0055] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention 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 limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.
[0056] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, and the indirect coupling or communication connection of devices or units can be electrical, mechanical or other forms.
[0057] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
[0058] In addition, each functional unit in each embodiment of the present utility model may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
[0059] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.
Claims
1. A circuit breaker anti-rebound device, characterized in that: It comprises a fixed shaft (7), a cantilever (2), a limit shaft (4) and a lock (3); The cantilever (2) is connected to the main shaft (1) of the circuit breaker operating mechanism and performs synchronous opening and closing rotation; The fixed shaft (7) is fixedly arranged on the circuit breaker operating mechanism; The lock buckle (3) is elastically rotatably arranged on the cantilever (2), and the limit shaft (4) is fixed on the cantilever (2); The lock buckle (3) is provided with a lock groove (31) and a first stop groove (32), and the cantilever (2) is provided with a second stop groove (21); when the lock buckle (3) is in an elastic reset state, the lock buckle (3) abuts against the limit shaft (4), and the first stop groove (32) protrudes from the second stop groove (21); When the switch is opened, the main shaft (1) drives the cantilever (2) to rotate to open the switch, and the first stop groove (32) of the lock buckle (3) first collides with the fixed shaft (7), thereby driving the lock buckle (3) to rotate on the cantilever (2), so that the lock groove (31) of the lock buckle (3) hooks the fixed shaft (7) to limit the cantilever (2) from rotating; after the cantilever (2) rebounds, the lock buckle (3) starts to perform elastic reset, and then the lock groove (31) is disengaged from the fixed shaft (7).
2. The circuit breaker anti-rebound device according to claim 1, characterized in that: A rotating shaft (5) is fixedly arranged on the cantilever (2), and the lock buckle (3) is sleeved on the rotating shaft (5); A torsion spring (6) is sleeved on the rotating shaft (5); one end of the torsion spring (6) abuts against the limiting shaft (4) and the other end abuts against the lock buckle (3).
3. The circuit breaker anti-rebound device according to claim 1, characterized in that: The fixed shaft (7) is a rigid part, and its shape is round or square.
4. The circuit breaker anti-rebound device according to claim 1, characterized in that: The limiting shaft (4) and the cantilever (2) are connected by thread, riveting or welding.
5. An operating mechanism, characterized in that: At least one set of circuit breaker anti-rebound devices according to any one of claims 1 to 4 is installed on the operating mechanism.
6. The operating mechanism according to claim 5, characterized in that: The fixed shaft (7) of the circuit breaker anti-rebound device is arranged on a side plate (8) of the operating mechanism.