Actuating mechanism of built-in disconnecting switch of circuit breaker

Abstract

The utility model discloses an actuating mechanism of a built-in isolating switch of a circuit breaker, and relates to the field of electrical elements, the actuating mechanism comprises a mechanism mounting plate, an isolating rotating shaft, a motor and a transmission assembly, the isolating rotating shaft is rotatably mounted on the mechanism mounting plate, the motor is mounted on the mechanism mounting plate, an output shaft of the motor is parallel to the isolating rotating shaft, and the transmission assembly is mounted on the isolating rotating shaft. The motor drives the isolation rotating shaft to rotate through the transmission assembly. According to the invention, closing and opening control is carried out on the isolation switch in an electric control mode, and safety can be guaranteed.

Description

Technical Field

[0001] The present application relates to the field of electrical switches, and in particular to an actuator of a built-in isolating switch of a circuit breaker. Background Art

[0002] Some outdoor vacuum circuit breakers are equipped with isolating switches to facilitate the switching operation of the circuit breaker and isolating switch. Since the isolating switch does not have an arc extinguishing function, the isolating switch and the circuit breaker must follow a certain switching sequence to ensure safety. However, in the actual circuit breaker operation process, operational errors sometimes occur, making it difficult to ensure the safety of the staff. Utility Model Content

[0003] In order to improve the safety during the operation of a built-in isolating switch of a circuit breaker, the present application provides an actuator for a built-in isolating switch of a circuit breaker.

[0004] The present application provides an actuator for a circuit breaker with a built-in isolating switch that adopts the following technical solution:

[0005] An actuator for a circuit breaker with a built-in isolating switch comprises a mechanism mounting plate, an isolating shaft, a motor and a transmission assembly, wherein the isolating shaft is rotatably mounted on the mechanism mounting plate, the motor is mounted on the mechanism mounting plate, the output shaft of the motor is parallel to the isolating shaft, and the motor drives the isolating shaft to rotate through the transmission assembly.

[0006] By adopting the above technical solution, the isolating switch is electrically controlled by the electric and transmission components, and the staff does not need to manually close and open the isolating switch, which is conducive to ensuring safety. In addition, the electrical switch used to control the motor can be set at a remote location, and the arc generated by the isolating switch due to operating errors is not easy to injure the staff. The isolating switch is driven by the motor and the transmission component, which is more convenient to operate and can be remotely controlled.

[0007] Optionally, the motor and the isolation shaft are respectively located on two sides of the mechanism mounting plate, the transmission assembly is a gear pair, and the mounting surface of the motor faces the isolation shaft.

[0008] By adopting the above technical solution, when the motor drives the isolation shaft to rotate through the gear pair, the motor is subjected to the reaction force of the isolation shaft, causing the motor to have a displacement tendency away from the isolation shaft. By setting the mounting surface of the motor to face the isolation shaft, the motor is not easily displaced away from the isolation shaft under the action of the reaction force, which is beneficial to ensuring the stability of the meshing state of the gear pair.

[0009] Optionally, two auxiliary brackets are provided on one side of the mechanism mounting plate close to the isolation shaft, the isolation shaft is rotatably connected to the two auxiliary brackets respectively, and the transmission assembly is located between the two auxiliary brackets.

[0010] By adopting the above technical solution, when the gear pair is meshed, the isolation shaft is subjected to a reaction force in the direction away from the motor, causing the isolation shaft to deform. At this time, the auxiliary brackets fixed on both sides of the gear pair reinforce the isolation shaft, making it less likely to bend and deform.

[0011] Optionally, a fixed connecting plate is commonly connected between the two auxiliary brackets.

[0012] By adopting the above technical solution, the two auxiliary brackets are connected and fixed by a fixed connecting plate, so that the two auxiliary brackets are connected to the isolation shaft as an integral component, which helps to reduce the number of components and reduce the accumulation of fitting errors during the installation of the isolation shaft, thereby making the rotation of the isolation shaft smoother.

[0013] Optionally, the transmission assembly includes a driving wheel, a swing arm and a connecting rod, the driving wheel is mounted on the output shaft of the motor, the swing arm is vertically fixed to the isolation shaft, one end of the connecting rod is hinged to the driving wheel, and the other end of the connecting rod is hinged to the swing arm, and the driving wheel, the swing arm and the connecting rod form a crank rocker mechanism.

[0014] By adopting the above technical solution, the rotation of the motor drives the isolation shaft to rotate and swing in the form of a crank rocker mechanism, wherein the driving wheel driven by the motor acts as a crank and does not need to swing back and forth, so that the motor can drive the isolation shaft to reciprocate in a unidirectional rotation manner, which is beneficial to reducing the functional requirements of the electricity, thereby helping to increase the types of applicable motors and simplifying the control requirements for the motors.

[0015] Optionally, the driving wheel is rotationally connected to the output shaft of the motor, a ratchet assembly is provided between the driving wheel and the output shaft of the motor, and the output shaft of the motor drives the driving wheel through the ratchet assembly.

[0016] By adopting the above technical solution, the motor drives the driving wheel to rotate through the ratchet assembly. When the disconnector needs to be manually closed or opened, it is only necessary to manually rotate the driving wheel to make the driving wheel rotate in the direction opposite to the motor driving direction, thereby achieving the purpose of manually closing or opening the disconnector.

[0017] Optionally, the mechanism mounting plate is provided with a driving wheel, the driving wheel and the driving wheel are both gears, and the driving wheel is provided with a rocker arm.

[0018] By adopting the above technical solution, the manual rotation control of the isolation shaft can be carried out by utilizing the rocker arm to drive the driving wheel so that the driving wheel drives the driving wheel to rotate, making the manual rotation control of the isolation shaft more convenient.

[0019] Optionally, the rocker arm is connected to the central part of the driving wheel in a ball-hinged manner, and a plurality of support rods are fixedly provided on the end surface of the driving wheel corresponding to one side of the rocker arm, and the plurality of support rods are distributed at equal angles around the center of the driving wheel.

[0020] By adopting the above technical solution, when the driving wheel is rotated, the rocker arm is abutted against one support rod, with one support rod as the fulcrum, and torque is applied to the driving wheel. When the driving wheel rotates a certain angle, the rocker arm is moved to abut against another support rod to continue applying torque to the driving wheel. The above method of rotating the driving wheel can make the rotation of the driving wheel more labor-saving and convenient.

[0021] In summary, the present application includes at least one of the following beneficial technical effects:

[0022] 1. The isolating switch is electrically controlled by electric and transmission components. The staff does not need to manually close and open the isolating switch, which is conducive to ensuring safety. The electrical switch used to control the motor can be set at a remote location, and the arc generated by the isolating switch due to operating errors is not easy to injure the staff.

[0023] 2. The two auxiliary brackets are connected and fixed by a fixed connecting plate, so that the two auxiliary brackets are connected to the isolation shaft as an integral component, which helps to reduce the number of components and the accumulation of matching errors during the installation of the isolation shaft, thereby facilitating smoother rotation of the isolation shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of Example 1.

[0025] Figure 2 This is a schematic diagram of Example 1 for reflecting the position relationship between the motor and the isolation shaft.

[0026] Figure 3 This is a schematic diagram of Example 2 for illustrating the connection relationship between the transmission component and the motor and the isolation shaft.

[0027] Description of reference numerals:

[0028] 1. Mechanism mounting plate; 2. Isolation shaft; 3. Motor; 4. Transmission assembly; 41. Driving gear; 42. Driven gear; 43. Driving wheel; 44. Swing arm; 45. Connecting rod; 46. Ratchet assembly; 461. Ratchet; 462. Ratchet pawl; 463. Spring; 47. Driving wheel; 48. Swing arm; 49. Support rod; 5. Auxiliary bracket; 51. Fixed connecting plate. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-3 This application is described in further detail.

[0030] Example 1

[0031] The embodiment of the present application discloses an actuator of a circuit breaker with a built-in isolating switch. Figure 1 and Figure 2 The actuator of the built-in isolating switch of the circuit breaker includes a mechanism mounting plate 1, an isolating shaft 2, a motor 3 and a transmission assembly 4. The isolating shaft 2 is rotatably mounted on the mechanism mounting plate 1 and remains parallel to the mechanism mounting plate 1; the motor 3 is a reduction motor 3, which is fixedly mounted on the side of the mechanism mounting plate 1 away from the isolating shaft 2. The output shaft of the motor 3 is parallel to the isolating shaft 2. The motor 3 drives the isolating shaft 2 to rotate through the transmission assembly 4. The transmission assembly 4 in this embodiment is a gear pair, which includes a driving gear and a driven gear. The driving gear is fixedly mounted on the output shaft of the motor 3, and the driven gear is fixedly mounted on the isolating shaft 2.

[0032] Reference Figure 1 Two auxiliary brackets 5 are provided on one side of the mechanism mounting plate 1 close to the isolation shaft 2, and a fixed connecting plate 51 is commonly connected between the two auxiliary brackets 5, and the fixed connecting plate 51 is integrally connected with the two auxiliary brackets. The isolation shaft 2 is rotatably connected to the two auxiliary brackets 5 respectively, and the gear pair is located between the two auxiliary brackets 5. The auxiliary brackets 5 can reinforce the isolation shaft 2, so that the isolation shaft 2 is not easy to bend and deform during the meshing process of the gear pair, which is conducive to the isolation shaft 2 to rotate smoothly and stably.

[0033] The implementation principle of the actuator of a built-in isolating switch in a circuit breaker in an embodiment of the present application is as follows: the isolating switch is electrically controlled by an electric and transmission component 4, and the staff does not need to manually close and open the isolating switch, which is beneficial to ensuring safety, and the electrical switch for controlling the motor 3 can be set at a remote position, so the arc generated by the isolating switch due to operating errors is not easy to injure the staff.

[0034] Example 2

[0035] The difference between this embodiment and the first embodiment is that the transmission assembly 4 in this embodiment is different from that in the first embodiment, and the auxiliary bracket 5 is not provided in this embodiment.

[0036] Reference Figure 3The transmission assembly 4 in this embodiment includes a driving wheel 43, a swing arm 44 and a connecting rod 45. The driving wheel 43 is mounted on the output shaft of the motor 3. The swing arm 44 is vertically fixed to the isolation shaft 2. One end of the connecting rod 45 is hinged to the driving wheel 43, and the other end of the connecting rod 45 is hinged to the swing arm 44. The driving wheel 43, the swing arm 44 and the connecting rod 45 form a crank rocker mechanism. The rotation of the motor 3 drives the isolation shaft 2 to rotate and swing in the manner of the crank rocker mechanism, so that the motor 3 can drive the isolation shaft 2 to realize reciprocating rotation in a unidirectional rotation manner.

[0037] It should be noted that, in addition to the structural form in this embodiment and the gear pair in Embodiment 1, the transmission assembly 4 may also be a sprocket transmission assembly 4 or a synchronous belt transmission assembly 4, etc.

[0038] The driving wheel 43 is rotatably connected with the output shaft of the motor 3. A ratchet assembly 46 is provided between the driving wheel 43 and the output shaft of the motor 3. The ratchet assembly 46 comprises a ratchet 461, a pawl 462 and a spring 463. The ratchet 461 is fixedly mounted on the output shaft of the motor 3. The pawl 462 is rotatably mounted on the end face of the driving wheel 43. The pawl 462 is misaligned with the connecting rod 45 along the axial direction of the output shaft of the motor 3. The pawl 462 is close to the driving wheel 43 relative to the connecting rod 45 so that the pawl 462 avoids the connecting rod 45 in motion. A section of the spring 463 is fixed to the driving wheel 43, and the other end of the spring 463 abuts against the pawl 462 to force the pawl 462 to abut against the ratchet 461. When the motor 3 rotates, the motor 3 drives the isolation shaft 2 to reciprocate through the ratchet assembly 46. In addition, by rotating the driving wheel 43 in the direction opposite to the rotation direction of the motor 3, the manual operation of the isolation shaft 2 can be realized.

[0039] The mechanism mounting plate 1 is provided with a driving wheel 47, and the driving wheel 47 and the driving wheel 43 are gears, and the driving wheel 47 is provided with a rocker arm 48. The rocker arm 48 is connected to the central part of the driving wheel 47 in a ball-jointed manner, and a plurality of supporting rods 49 are fixedly provided on the end surface of the driving wheel 47 corresponding to one side of the rocker arm 48, and the plurality of supporting rods 49 are distributed at equal angles around the center of the driving wheel 47.

[0040] When the isolation shaft 2 is manually rotated, the rocker arm 48 is abutted against one of the support rods 49, with the support rod 49 as a fulcrum, and torque is applied to the drive wheel 47. After the drive wheel 47 rotates a certain angle, the rocker arm 48 is moved to abut against another support rod 49, and torque is continued to be applied to the drive wheel 47. The above-mentioned method of rotating the drive wheel 47 can make the rotation of the drive wheel 47 more labor-saving and convenient.

[0041] It is worth mentioning that after the isolation shaft 2 is manually operated indirectly by the rocker arm 48, the rocker arm 48 needs to be rotated to a state parallel to the isolation shaft 2, so that when the motor 3 drives the rocker arm 48 to rotate through the driving wheel 43 and the driving wheel 47, the rocker arm 48 is not easy to hit other components. In addition, in order to keep the state of the rocker arm 48 parallel to the isolation shaft 2 stable, a larger friction damping can be set at the ball hinge part between the rocker arm 48 and the driving wheel 47, or a bracket for preventing the rocker arm 48 from hitting can be set as needed, which will not be elaborated here.

[0042] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An actuator for a circuit breaker with a built-in isolating switch, characterized in that: The invention comprises a mechanism mounting plate (1), an isolation rotating shaft (2), a motor (3) and a transmission assembly (4); the isolation rotating shaft (2) is rotatably mounted on the mechanism mounting plate (1); the motor (3) is mounted on the mechanism mounting plate (1); the output shaft of the motor (3) is parallel to the isolation rotating shaft (2); and the motor (3) drives the isolation rotating shaft (2) to rotate via the transmission assembly (4).

2. The actuator of the circuit breaker built-in isolating switch according to claim 1, characterized in that: The motor (3) and the isolation shaft (2) are respectively located on the mechanism mounting plate (1); the transmission assembly (4) is a gear pair; and the mounting surface of the motor (3) faces the isolation shaft (2).

3. The actuator of the circuit breaker with built-in isolating switch according to claim 1, characterized in that: Two auxiliary brackets (5) are provided on one side of the mechanism mounting plate (1) close to the isolation rotating shaft (2); the isolation rotating shaft (2) is rotatably connected to the two auxiliary brackets (5) respectively; and the transmission assembly (4) is located between the two auxiliary brackets (5).

4. The actuator of the circuit breaker built-in isolating switch according to claim 3, characterized in that: A fixed connecting plate (51) is commonly connected between the two auxiliary brackets (5).

5. The actuator of the circuit breaker with built-in isolating switch according to claim 1, characterized in that: The transmission assembly (4) comprises a driving wheel (43), a swing arm (44) and a connecting rod (45); the driving wheel (43) is mounted on the output shaft of the motor (3); the swing arm (44) is vertically fixed to the isolation shaft (2); one end of the connecting rod (45) is hinged to the driving wheel (43); the other end of the connecting rod (45) is hinged to the swing arm (44); the driving wheel (43), the swing arm (44) and the connecting rod (45) form a crank rocker mechanism.

6. The actuator of the circuit breaker with built-in isolating switch according to claim 5, characterized in that: The driving wheel (43) is rotationally connected to the output shaft of the motor (3), a ratchet assembly (46) is provided between the driving wheel (43) and the output shaft of the motor (3), and the output shaft of the motor (3) drives the driving wheel (43) through the ratchet assembly (46).

7. The actuator of the circuit breaker with built-in isolating switch according to claim 6, characterized in that: The mechanism mounting plate (1) is provided with a driving wheel (47), the driving wheel (47) and the driving wheel (43) are both gears, and the driving wheel (47) is provided with a rocker arm (48).

8. The actuator of the circuit breaker with built-in isolating switch according to claim 7, characterized in that: The rocker arm (48) is connected to the central part of the driving wheel (47) in a ball-jointed manner, and a plurality of support rods (49) are fixedly provided on the end surface of the driving wheel (47) corresponding to one side of the rocker arm (48), and the plurality of support rods (49) are distributed at equal angles around the center of the driving wheel (47).

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