Reclosing circuit breaker with springback prevention mechanism

Abstract

The invention discloses a reclosing circuit breaker with a springback prevention mechanism, which comprises a circuit breaker and a reclosing accessory, the circuit breaker is connected with the reclosing accessory through a connecting piece, the reclosing accessory is connected with a handle through a handle connecting rod, the handle connecting rod is sleeved on the handle, and the reclosing accessory is connected with the circuit breaker through a connecting piece. The handle and the handle connecting rod rotate together, the reclosing accessory receives a control signal to drive the motor to provide a driving force to drive the handle connecting rod to move through the gear so as to drive the circuit breaker to carry out closing and opening actions, and the handle connecting rod is further connected with a springback prevention assembly. The springback preventing assembly is used for preventing the handle connecting rod from rotating anticlockwise along with the driving gear, and the problem that the handle connecting rod cannot make contact with the position switch all the time is solved. Compared with the prior art, the circuit breaker has the advantages that the reclosing accessory can be always kept at the closing and opening positions through the structural design in the closing and opening states, and correct position signals can be output, so that the problem that the closing and opening positions of the circuit breaker cannot be judged can be solved, the closing reliability is improved, and the use experience of customers is improved; and the line safety is improved.

Description

Technical Field

[0001] This invention relates to the field of low-voltage electrical technology, and in particular to a reclosing circuit breaker with an anti-rebound mechanism. Background Technology

[0002] Currently, miniature circuit breakers (MCBs) are widely used in low-voltage power distribution networks, primarily in various locations such as industrial, commercial, high-rise, and residential buildings. They provide overcurrent and leakage protection for electrical equipment such as motors, power lines, and lighting circuits. Traditionally, the opening and closing operations of miniature circuit breakers require manual operation. With the development of my country's smart grid, the need for intelligent control of electrical appliances is becoming increasingly urgent while ensuring the safe operation of the grid. To address these new demands, existing miniature circuit breakers should incorporate automatic reclosing functionality. The automatic reclosing device for circuit breakers is an accessory used for remotely electrically opening and closing circuit breakers.

[0003] Currently, reclosing accessories are used to drive multi-pole circuit breakers for closing and opening operations. Generally, the reclosing accessory is installed on the left or right side of the circuit breaker, and a handle linkage drives the circuit breaker handle for closing and opening operations. When driving single-pole and double-pole circuit breakers, the electric operating device typically uses a motor-gear mechanism to push the circuit breaker handle. After the circuit breaker closes or opens, the gear mechanism needs to return to the middle position. The internal drive gear will cause the electric operating handle to spring back, which can lead to poor coordination between the electric operating handle and the electric operating position switch. This prevents the correct output of feedback signals to the control chip of the electric operating device, making it impossible to determine the closing or opening position of the circuit breaker. This can result in abnormal closing and opening operations, seriously affecting the electrical safety of the power distribution system, potentially causing safety accidents, and impacting customer benefits.

[0004] Therefore, providing a structure that prevents rebound through reclosing can be achieved through structural design that ensures the reclosing accessory remains in the closed or open position during both closing and opening states, and can output the correct position signal. This would solve the problem of abnormal closing and opening operations caused by the inability to determine the circuit breaker's closing or opening position, which seriously affects the electrical safety of the power distribution system. Improving closing reliability, enhancing customer experience, and increasing line safety are urgent technical issues that need to be addressed. Summary of the Invention

[0005] The purpose of this invention is to provide a reclosing circuit breaker with an anti-rebound mechanism, thereby solving the aforementioned problems existing in the prior art.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: This invention provides a reclosing circuit breaker with an anti-rebound mechanism, comprising a circuit breaker and a reclosing accessory. The circuit breaker and the reclosing accessory are connected by a connector. The reclosing accessory is connected to a handle via a handle linkage. The handle linkage is sleeved on the handle, and the handle and the handle linkage rotate together. When the reclosing accessory receives a control signal, it drives a motor to provide driving force, which drives the handle linkage to move through a gear, thereby driving the circuit breaker to perform closing and opening actions. The handle linkage is also connected to an anti-rebound component, which is used to prevent the handle linkage from rotating counterclockwise with the drive gear, thus avoiding the problem that the handle linkage and the position switch cannot always be in contact.

[0007] Furthermore, the connector is a snap fastener or a rivet.

[0008] Furthermore, the anti-rebound assembly includes an elastic element, one end of which is connected to the handle linkage, and the other end of which is connected to the reclosing accessory.

[0009] Furthermore, the elastic element is a spring.

[0010] Furthermore, one end of the spring is provided with a first hook and the other end is provided with a second hook. The first hook is connected to the handle connecting rod, and the second hook is connected to the reclosing accessory.

[0011] Furthermore, in order to connect with the spring, the handle linkage is also provided with a mounting groove, and the middle seat of the reclosing accessory is also provided with a spring rotation shaft.

[0012] Furthermore, during the movement of the handle linkage from the open position to the closed position, the elastic element also moves along with the handle linkage. When it reaches the closed position, the handle linkage is subjected to a pulling force F by the elastic element, and the base of the reclosing accessory is subjected to a pressure F provided by the handle linkage. The resultant force F_resultant of the pulling and pressure F_resultant is in the same direction as the movement direction of the handle linkage. The elastic element can provide a pressure F_resultant to keep the handle linkage in contact with the base. The pressure F_resultant on the handle linkage can overcome the friction between the drive gear and the handle linkage, preventing the handle linkage from rotating counterclockwise with the drive gear.

[0013] Furthermore, the reclosing accessory includes a base, a middle seat, a motor, a worm gear, and a gear assembly. The middle seat is fixedly mounted on the base, the motor is mounted on the base, the worm gear is mounted on the upper end of the motor, the gear assembly meshes with the worm gear, and the gear assembly is also connected to a drive gear. The axial rotational force of the motor is changed in direction and amplified in torque through the worm gear and the gear assembly mounted on the base, and transmitted to the drive gear. The shaft is fixed to the middle seat, and the drive gear can rotate around the shaft. The clockwise rotation of the motor drives the drive gear to rotate. During the rotation, the drive gear drives the handle linkage to rotate around the shaft, and the handle linkage drives the handle to move, realizing the circuit breaker's opening function. The first limit surface of the handle linkage is always in contact with the second position switch, that is, the handle linkage remains in the open position. The second position switch continuously outputs an opening signal to the control board, and the control board receives the continuous signal to determine that the circuit breaker is in the open position. The motor rotates counterclockwise, driving the drive gear to rotate. The drive gear drives the handle linkage to move, and the handle linkage drives the handle to move, thus realizing the circuit breaker's closing function. The second limiting surface of the handle linkage is always in contact with the first position switch, meaning the handle linkage remains in the closed position. The first position switch directly outputs a closing signal to the control board, and the control board receives the continuous signal to determine if the circuit breaker is in the closed position.

[0014] Furthermore, the mounting groove is fixed to the handle connecting rod by integral molding, and the spring rotation shaft is fixed to the middle seat by integral molding.

[0015] The beneficial effects of this invention are: The present invention, due to the inclusion of an anti-rebound component, can effectively ensure that the reclosing accessory remains in the closed or open position during both closing and opening states. This structure, through its design, ensures the correct position signal is output, thus resolving the inability to determine the circuit breaker's closing or opening position. This improves closing reliability, enhances the user experience, and increases line safety, providing customers with a safer and more reliable user experience. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the assembly of the circuit breaker and reclosing assembly of the present invention; Figure 2 This is a schematic diagram of the reclosing assembly structure of the present invention; Figure 3 This is a diagram showing the tripping state of the anti-rebound component of the present invention; Figure 4 This is a diagram showing the closing state of the anti-rebound component of the present invention; Figure 5This is a force analysis diagram of the anti-rebound component of the present invention; Figure 6 This is a schematic diagram of the position switch structure of the present invention; Figure 7 This is a schematic diagram of the handle linkage structure of the present invention; Figure 8 This is a schematic diagram of the handle linkage structure of the present invention.

[0017] Figure label: Reclosing accessory 21, handle linkage 22, handle 23, circuit breaker 24; Base 30, motor 31, worm gear 32, gear assembly 33, drive gear 34 41. Middle seat; 42. Elastic element; 43. Spring rotation shaft; Second limiting surface 61, first limiting surface 62, mounting groove 63; First position switch 81, second position switch 82, control board 83. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0019] It should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the present invention or simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0020] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0021] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0022] Furthermore, to better illustrate this application, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this application can be implemented without certain specific details. In some instances, methods, means, components, and circuits well-known to those skilled in the art have not been described in detail in order to highlight the main points of this application.

[0023] like Figures 1 to 8 As shown, the present invention provides a circuit breaker reclosing anti-rebound device, including a circuit breaker 24 and a reclosing accessory 21. The circuit breaker 24 and the reclosing accessory 21 are connected by a connector. The reclosing accessory 21 is connected to a handle 23 via a handle link 22. The handle link 22 is sleeved on the handle 23. The handle 23 and the handle link 22 rotate together. When the reclosing accessory 21 receives a control signal, it drives a motor to provide driving force, which drives the handle link 22 to move through a gear, thereby driving the circuit breaker 24 to perform closing and opening actions. The handle link 22 is also connected to an anti-rebound component, which is used to prevent the handle link 22 from rotating counterclockwise with the drive gear, thus avoiding the problem that the handle link 22 cannot always be in contact with the position switch.

[0024] As can be seen from the above, the anti-rebound component effectively ensures that the reclosing accessory remains in the closed or open position during both closing and opening states. This design allows the correct position signal to be output, thus resolving the issue of abnormal closing and opening operations caused by the inability to determine the circuit breaker's closing or opening position, which seriously affects the electrical safety of the power distribution system. This improves closing reliability, enhances the user experience, and increases line safety, providing customers with a safer and more reliable user experience.

[0025] In this embodiment, the circuit breaker 24 and the reclosing accessory 21 are connected by a snap-fit. In another embodiment, the circuit breaker 24 and the reclosing accessory 21 are connected by a rivet.

[0026] It should be noted that the anti-rebound assembly includes an elastic element 42. One end of the elastic element 42 is connected to the handle linkage 22, and the other end is connected to the reclosing accessory 21. In this embodiment, the elastic element 42 is a spring. The elastic element 42 effectively absorbs and buffers the kinetic energy at the end of the mechanism's movement, completely eliminating the rebound and vibration of the handle 23, ensuring the stability and reliability of the working position. Furthermore, it has a simple structure, low cost, and is easy to implement. It is also worth mentioning that this anti-rebound assembly consists of only one elastic element (such as a spring or spring sheet), eliminating the need for complex levers, latches, or hydraulic systems. Its compact and ingenious structure does not occupy excessive space, making it very suitable for application in space-constrained electrical products (such as the reclosing circuit breaker and load switch with the anti-rebound mechanism of this invention).

[0027] Specifically, the spring 42 has a first hook at one end and a second hook at the other end. The first hook is connected to the handle linkage 22 via the first hook, and the second hook is connected to the reclosing accessory 21. The first and second hooks form a clear mechanical interlock, effectively preventing the spring from accidentally disengaging due to vibration or changes in force direction during equipment operation. This connection method is more stable than simple hooking or placement, ensuring the continuity of power transmission and the reliability of the entire operating system. The hook design makes the installation and removal of the spring intuitive and simple. Operators can quickly complete the connection or replacement without the need for complex tools or cumbersome procedures, greatly reducing assembly difficulty and improving the efficiency of production, installation, and subsequent maintenance.

[0028] Furthermore, in order to connect with the spring, the handle connecting rod 22 is also provided with a mounting groove 63, and the middle seat 41 of the reclosing accessory 21 is also provided with a spring rotation shaft 43. The first hook of the spring is hooked on the mounting groove 63, and the second hook of the spring is installed on the spring rotation shaft 43.

[0029] In addition, it should be noted that you should refer to [the relevant information]. Figure 5 As shown, during the process of the handle linkage 22 moving from the open position to the closed position, the elastic element 42 also moves along with the handle linkage 22. When it moves to the closed position, the handle linkage 22 is subjected to the pulling force F of the elastic element 42, and the base of the reclosing accessory 21 is subjected to the pressure F provided by the handle linkage 22. The direction of the resultant force F_resultant of the pulling force and the pressure F_resultant is consistent with the direction of movement of the handle linkage 22. The elastic element 42 can provide a pressure F to keep the handle linkage 22 in contact with the base. The pressure F provided by the handle linkage 22 can overcome the friction between the drive gear 34 and the handle linkage 22, and prevent the handle linkage 22 from rotating counterclockwise with the drive gear 34. The working principle of the spring force of the handle linkage 22 in the open position is the same as that in the closed position.

[0030] The reclosing accessory 21 includes a base 30, a middle seat 41, a motor 31, a worm gear 32, and a gear assembly 33. The middle seat 41 is fixedly mounted on the base 30. The motor 31 is mounted on the base 30. The worm gear 32 is mounted on the upper end of the motor 31. The gear assembly 33 meshes with the worm gear 32 and is also connected to a drive gear 34. The axial rotational force of the motor 31 is changed in direction and amplified in torque through the worm gear 32 and the gear assembly 33 mounted on the base 30, and then transmitted to the drive gear. The shaft 35 is fixed to the middle seat 41. 1. The drive gear 34 can rotate around the shaft 35. The motor 31 rotates clockwise to drive the drive gear 34 to rotate. During the rotation, the drive gear 34 drives the handle linkage 22 to rotate around the shaft. The handle linkage 22 drives the handle 23 to move, so that the circuit breaker can realize the tripping function. The first limiting surface 62 of the handle linkage 22 is always in contact with the second position switch 82, that is, the tripping position of the handle linkage 22 is kept in the tripping position. The second position switch 82 continuously outputs a tripping signal to the control board. The control board receives the continuous signal to determine that the circuit breaker is in the tripping position. The counterclockwise rotation of the motor drives the drive gear 34 to rotate, which in turn drives the handle linkage 22 to move. The handle linkage 22 then drives the handle 23 to move, thus enabling the circuit breaker 24 to perform the closing function. The second limiting surface 61 of the handle linkage 22 is always in contact with the first position switch 81, meaning the closing position 51 of the handle linkage 22 remains in the closed position. The first position switch 81 directly outputs a closing signal to the control board 83, and the control board 83 receives the continuous signal to determine whether the circuit breaker 24 is in the closed position.

[0031] It is also worth mentioning that the mounting groove 63 is fixed to the handle linkage 22 by integral molding, and the spring rotation shaft is fixed to the center seat 41 by integral molding. This integral molding structure eliminates the connection points and assembly gaps caused by traditional methods such as screw fastening, welding, or press fitting. This avoids the risk of failure due to loose connections, wear, or stress concentration, making the handle linkage-mounting groove 63 and the center seat 41-rotation shaft each a robust whole, greatly improving the product's structural strength, rigidity, and long-term reliability.

[0032] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A reclosing circuit breaker with anti-rebound mechanism, comprising a circuit breaker and a reclosing accessory, the circuit breaker is connected with the reclosing accessory through a connecting piece, the reclosing accessory is connected with a handle through a handle connecting rod, the handle connecting rod is sleeved on the handle, the handle rotates with the handle connecting rod, the reclosing accessory receives a control signal to drive a motor to provide driving force to drive the handle connecting rod to move, so as to drive the circuit breaker to perform closing and opening actions, the handle connecting rod is also connected with an anti-rebound assembly, the anti-rebound assembly is used to prevent the handle connecting rod from rotating counterclockwise with the driving gear, and avoid the problem that the handle connecting rod cannot always contact with the position switch.

2. The reclosing circuit breaker with anti-rebound mechanism according to claim 1, characterized in that: The connecting piece is a buckle or a rivet.

3. The reclosing circuit breaker with anti-rebound mechanism according to claim 1, characterized in that: The anti-rebound assembly comprises an elastic member, one end of the elastic member is connected with the handle connecting rod, and the other end of the elastic member is connected with the reclosing accessory.

4. The reclosing circuit breaker with anti-rebound mechanism according to claim 3, characterized in that: The elastic member is a spring.

5. The reclosing circuit breaker with anti-rebound mechanism according to claim 4, characterized in that: One end of the spring is provided with a first hook part, and the other end of the spring is provided with a second hook part, the first hook part is connected with the handle connecting rod, and the second hook part is connected with the reclosing accessory.

6. The reclosing circuit breaker with anti-rebound mechanism according to claim 5, characterized in that: In order to be connected with the spring, the handle connecting rod is also provided with a mounting groove, and the middle seat of the reclosing accessory is also provided with a spring rotation shaft.

7. The reclosing circuit breaker with anti-rebound mechanism according to claim 1, characterized in that: During the movement of the handle connecting rod from the opening position to the closing position, the elastic member also moves with the handle connecting rod, when the handle connecting rod is moved to the closing position, the handle connecting rod is pulled by the elastic member with a pulling force Fal, the base of the reclosing accessory is pressed by the handle connecting rod with a pressing force Fpress, the resultant force Fcombine of Fal and Fpress is in the same direction as the movement direction of the handle connecting rod, the elastic member can provide a force Fpress to make the handle connecting rod always contact with the base, and the handle connecting rod can overcome the friction between the driving gear and the handle connecting rod by the force Fpress, so that the handle connecting rod is prevented from rotating counterclockwise with the driving gear.

8. The reclosing circuit breaker with anti-rebound mechanism according to claim 1, wherein: The reclosing accessory comprises a base, a middle seat, a motor, a worm and a gear assembly, the middle seat is fixedly installed on the base, the motor is installed on the base, the worm is installed on the upper end of the motor, the axial rotation force of the motor is changed in direction and torque is amplified through the worm and the gear assembly installed on the base, and is transmitted to the driving gear, the shaft is fixed to the middle seat, the driving gear can rotate around the shaft, the motor rotates clockwise to drive the driving gear to rotate, in the rotating process, the driving gear drives the handle connecting rod to rotate around the shaft, the handle connecting rod drives the handle to move, so that the circuit breaker realizes the opening function, the first limiting surface of the handle connecting rod always contacts with the second position switch, that is, the opening position of the handle connecting rod is kept at the opening position, the second position switch always outputs an opening signal to the control panel, and the control panel receives the continuous signal to judge that the circuit breaker is in the opening position. The motor rotates counterclockwise to drive the driving gear to rotate, the driving gear drives the handle connecting rod to move, and the handle connecting rod drives the handle to move, so that the circuit breaker realizes and closes the function; the second limiting surface of the handle connecting rod is always in contact with the first position switch, that is, the handle connecting rod closing position is kept at the closing position, the first position switch directly outputs a closing signal to the control panel, and the control panel receives a continuous signal to judge that the circuit breaker is in the closing position.

9. The reclosing circuit breaker with anti-rebound mechanism according to claim 6, characterized in that: The mounting groove is fixed on the handle connecting rod in an integral molding mode, and the spring rotary shaft is fixed on the middle seat in an integral molding mode.

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