A circuit breaker drive

Abstract

The present application relates to the technical field of circuit breaker, particularly relates to a transmission device of circuit breaker. The present application comprises a circuit breaker group, a support frame, a transmission shaft, a connecting rod, an energy storage mechanism, a closing mechanism and an opening mechanism, and is characterized in that: the circuit breaker group is connected with the upper end of the support frame through the transmission shaft, one end of the transmission shaft is connected with one end of the connecting rod through a cam mechanism, the other end of the connecting rod is provided with the energy storage mechanism, the closing mechanism and the opening mechanism, and the energy storage mechanism, the closing mechanism and the opening mechanism are all fixed on the outer side of the support frame. The present application innovatively arranges the circuit breaker and the circuit breaker transmission device staggeredly, and the mutual separation of the circuit breaker and the circuit breaker transmission device greatly releases the effective space. Meanwhile, the separation of the circuit breaker and the circuit breaker transmission device makes the personnel far away from the high-voltage area during the daily maintenance and the emergency repair, and further guarantees the personal safety.

Description

Technical Field

[0001] This invention belongs to the field of circuit breaker technology, and specifically relates to a transmission device for a circuit breaker. Background Technology

[0002] A circuit breaker is a switching device capable of closing, carrying, and interrupting current under normal circuit conditions, and capable of closing, carrying, and interrupting current under abnormal circuit conditions within a specified time. The transmission mechanism of a circuit breaker is an important component, transmitting the power of the motor to the circuit breaker's drive shaft to achieve closing and opening.

[0003] Traditional circuit breakers share the same drive shaft and output shaft of the transmission mechanism, necessitating the placement of the bulky operating mechanism alongside the circuit breaker, both horizontally and vertically. This results in the integration of two complex structures: the circuit breaker and the operating mechanism. Such circuit breaker transmission devices occupy significant cabinet space, and the complex structure and overly concentrated parts create numerous inconveniences for daily inspection and maintenance. Furthermore, they fail to meet the demands of future power grid lightweighting in terms of size, weight, reliability, and efficiency. Summary of the Invention

[0004] The present invention addresses the aforementioned problems and overcomes the shortcomings of the prior art by providing a circuit breaker transmission device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a transmission device for a circuit breaker, comprising a circuit breaker assembly, a support frame, a transmission shaft, a connecting rod, an energy storage mechanism, a closing mechanism, and a tripping mechanism, characterized in that: the circuit breaker assembly is connected to the upper end of the support frame via the transmission shaft, one end of the transmission shaft is connected to one end of the connecting rod via a cam mechanism, and the other end of the connecting rod is provided with an energy storage mechanism, a closing mechanism, and a tripping mechanism, all of which are fixed to the outside of the support frame.

[0006] In a preferred embodiment, the energy storage mechanism includes a closing energy storage mechanism and a closing energy storage mechanism.

[0007] Furthermore, the closing energy storage mechanism includes a drive motor, which is connected to a reduction mechanism, which is connected to a crank arm, and a closing spring is provided at the rear end of the crank arm.

[0008] Furthermore, the reduction mechanism includes a worm gear reducer, one end of which is connected to a drive motor, and the other end of which is connected to one end of an output shaft. A pinion is provided at the other end of the output shaft, which meshes with a large gear, and the large gear is coaxially connected to a crank arm.

[0009] Furthermore, the tripping energy storage mechanism includes a cam, which is coaxially connected to a large gear, and is connected to a linkage transmission mechanism. The linkage transmission mechanism is connected to a connecting rod, and the connecting rod is connected to a spring fixing rod. A tripping spring is provided on the spring fixing rod, and a fixing nut is provided on the connecting rod at one end of the tripping spring. A disc is provided between the fixing nut and the tripping spring.

[0010] Furthermore, the linkage transmission mechanism includes a roller rocker arm, one end of which is connected to a cam, and the other end of which is connected to a first connecting block via a connecting rod. The connecting rod, the roller rocker arm, and the first connecting block are all hinged. The first connecting block and the second connecting block are coaxially connected, and the second connecting block is connected to the connecting rod.

[0011] Furthermore, the closing mechanism includes a closing button assembly, which is connected to one end of a closing connecting shaft. The other end of the closing connecting shaft is provided with a first groove, which is connected to one end of a third connecting block. The other end of the third connecting block is provided with a closing spring, and a crank arm connected to the closing spring is coaxially connected to a cam.

[0012] Furthermore, the closing button assembly includes a support body and a crossbar. The support body is located at one end of the closing connecting shaft. Two arc-shaped grooves are symmetrically arranged on the outer wall of the support body. The crossbar passes through the two arc-shaped grooves. The closing button is located on the outside of the support body.

[0013] In a preferred embodiment, the tripping mechanism includes a tripping button assembly, which is connected to one end of a tripping connecting shaft. The other end of the tripping connecting shaft is provided with a first groove, which is connected to one end of a fourth connecting block. The other end of the fourth connecting block is connected to a roller rocker arm.

[0014] Furthermore, the trip button assembly includes a support body and a crossbar. The support body is located at one end of the trip connecting shaft. Two arc-shaped grooves are symmetrically arranged on the outer wall of the support body. The crossbar passes through the two arc-shaped grooves. A trip button is located on the outside of the support body.

[0015] The beneficial effects of this invention are as follows: 1. Space saving: This invention innovatively arranges the circuit breaker and the circuit breaker drive device in an alternating manner, and the separation of the circuit breaker and the circuit breaker drive device greatly frees up the effective space.

[0016] 2. Safer: The circuit breaker and circuit breaker drive device are separated, allowing personnel to stay away from high-voltage areas during routine maintenance and emergency repairs, further ensuring personal safety.

[0017] 3. More efficient: The invention uses a multi-link structure in many places, which improves the transmission efficiency of the transmission device and reduces energy consumption. The efficient transmission also greatly extends the service life of the mechanism. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure in use of the present invention.

[0019] Figure 2 This is a schematic diagram of the overall structure of the present invention.

[0020] Figure 3 This is a top view of the overall structure of the present invention.

[0021] Figure 4 This is a bottom view of the overall structure of the present invention.

[0022] Figure 5 This is a schematic diagram of the overall structure of the present invention from the left.

[0023] Figure 6 This is a right-side view of the overall structure of the present invention.

[0024] Figure 7 This is a schematic diagram of the closing button assembly structure of the present invention.

[0025] Figure 8 This is a schematic diagram of the structure of the trip button assembly of the present invention.

[0026] The attached figures are labeled as follows: 1. Drive motor; 2. Worm gear reducer; 3. Output shaft; 4. Pinion; 5. Gear; 6. Crank arm; 7. Closing spring; 8. Cam; 9. Roller rocker arm; 10. Connecting rod; 11. First connecting block; 12. Second connecting block; 13. Connecting rod; 14. Spring fixing rod; 15. Opening spring; 16. Disc; 17. Fixing nut; 18. Opening connecting shaft; 19. Closing connecting shaft; 20. First groove; 21. Third connecting block; 22. Second groove; 23. Fourth connecting block; 24. First support body; 25. Arc-shaped groove; 26. First crossbar; 27. Closing button; 28. Second support body; 29. ​​Second arc-shaped groove; 30. Second crossbar; 31. Opening button; 32. Support frame; 33. Transmission shaft; 34. Circuit breaker group; 35. Cam mechanism. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Refer to the instruction manual appendix Figure 1-8This embodiment discloses a transmission device for a circuit breaker, comprising a circuit breaker assembly 34, a support frame 32, a transmission shaft 33, a connecting rod 13, an energy storage mechanism, a closing mechanism, and a opening mechanism. The circuit breaker assembly 34 is connected to the upper end of the support frame 32 via the transmission shaft 33. One end of the transmission shaft 33 is connected to one end of the connecting rod 13 via a cam mechanism 35. The other end of the connecting rod 13 is provided with the energy storage mechanism, the closing mechanism, and the opening mechanism, all of which are fixed to the outside of the support frame 32. The energy storage mechanism includes a closing energy storage mechanism and an opening energy storage mechanism. The closing energy storage mechanism includes a drive motor 1, which is connected to a reduction mechanism. The reduction mechanism is connected to a crank arm 6, and a closing spring 7 is provided at the rear end of the crank arm 6. The reduction mechanism includes a worm gear reducer 2, one end of which is connected to a drive motor 1, and the other end of which is connected to one end of an output shaft 3. A pinion 4 is mounted on the other end of the output shaft 3, meshing with a large gear 5. The large gear 5 is coaxially connected to a crank arm 6. The tripping energy storage mechanism includes a cam 8, coaxially connected to the large gear 5, and connected to a linkage transmission mechanism. The linkage transmission mechanism is connected to a connecting rod 13, which is connected to a spring fixing rod 14. A tripping spring 15 is mounted on the spring fixing rod 14, and a fixing nut 17 is mounted on the connecting rod 14 at one end of the tripping spring 15. A disc 16 is positioned between the fixing nut 17 and the tripping spring 15. The linkage transmission mechanism includes a roller rocker arm 9, one end of which is connected to a cam 8, and the other end of which is connected to a first connecting block 11 via a connecting rod 10. The connecting rod 10, the roller rocker arm 9, and the first connecting block 11 are all hinged. The first connecting block 11 is coaxially connected to a second connecting block 12, and the second connecting block 12 is connected to a connecting rod 13. The closing mechanism includes a closing button assembly, which is connected to one end of a closing connecting shaft 19. The other end of the closing connecting shaft 19 is provided with a first groove 20, which is connected to one end of a third connecting block 21. The other end of the third connecting block 21 is provided with a closing spring 7, and a crank arm 6 connected to the closing spring 7 is coaxially connected to the cam 8. The closing button assembly includes a first support body 24 and a first crossbar 26. The first support body 24 is disposed at one end of the closing connecting shaft 19. Two first arc-shaped grooves 25 are symmetrically arranged on the outer wall of the first support body 24. The first crossbar 26 passes through the two first arc-shaped grooves 25. A closing button 27 is disposed on the outer side of the first support body 24. The opening mechanism includes an opening button assembly. The opening button assembly is connected to one end of the opening connecting shaft 18. The other end of the opening connecting shaft 18 is provided with a second groove 22. The second groove 22 is connected to one end of a fourth connecting block 23. The other end of the fourth connecting block 23 is connected to a roller rocker arm 9.The trip button assembly includes a second support body 28 and a second crossbar 30. The second support body 28 is located at one end of the trip connecting shaft 18. Two second arc-shaped grooves 29 are symmetrically arranged on the outer wall of the second support body 28. The second crossbar 30 passes through the two second arc-shaped grooves 29. A trip button 31 is provided on the outside of the second support body 28.

[0029] The specific implementation scenario is as follows: The operator first activates the energy storage system and starts the drive motor 1. During the closing and energy storage process: the power from drive motor 1 is amplified in torque and reduced in speed by the worm gear reducer 2, and then transmitted to the coaxial pinion 4 via the output shaft 3. The pinion 4 meshes with the large gear 5, further amplifying the torque and reducing the speed. After two stages of reduction, a high-torque, low-speed output power is obtained. The large gear 5 transmits the torque to the crank arm 6 at the shaft end, and the crank arm 6 pulls the closing spring 7 to complete the closing and energy storage process. Opening energy storage: During the closing energy storage process, the cam 8, which is coaxial with the large gear 5, rotates clockwise. As the roller rocker arm 9 moves to the upper stop point of the cam 8, it pushes the roller rocker arm 9 to rotate counterclockwise. The roller rocker arm 9 is connected to the connecting rod 10 by a hinge. The connecting rod 10 is connected to the first connecting block 11 by a hinge. The roller rocker arm 9, the connecting rod 10, the first connecting block 11, and the support frame 32 together form a high-efficiency four-bar linkage mechanism, which transmits huge torque to the second connecting block 12. The other end of the second connecting block 12 pulls the connecting rod 13 to move. The connecting rod 13 compresses the opening spring 15 by driving the bottom disc 16 to complete the opening energy storage. Closing process: Press the closing button 27. The closing button 27 rotates clockwise along the first arc groove 25, which in turn drives the closing connecting shaft 19 to rotate. The closing connecting shaft 19 has a first groove 20. The third connecting block 21 was originally constrained by the first groove 20. When the closing connecting shaft 19 rotates, it rotates with the third connecting block 21. At this time, the third connecting block 21 loses its constraint on the cam 8. At this time, the closing spring 7 is released, and the cam 8 rotates counterclockwise. During the process of the roller rocker 9 moving to the upper stop of the cam, the power is transmitted to the connecting rod 13 through the four-bar linkage. The connecting rod 13 moves downward and transmits the power to the transmission shaft 33 through the cam mechanism 35 to complete the closing action. Opening process: Press the opening button 31. The opening button 31 rotates clockwise along the second arc-shaped groove 29, which in turn drives the opening connecting shaft 18 to rotate. The opening connecting shaft 18 has a second groove 22. The fourth connecting block 23 was originally constrained by the second groove 22. When the opening connecting shaft 18 rotates, it rotates with the fourth connecting block 23. At this time, the fourth connecting block 23 loses its constraint on the roller rocker arm 9. During the process of the roller rocker arm 9 moving to the upper stop of the cam, the power is transmitted to the connecting rod 13 through the four-bar linkage. The connecting rod 13 moves upward and transmits the power to the transmission shaft 33 through the cam mechanism 35, completing the opening action.

[0030] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed when in use. They are only for the convenience of describing this invention and 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 limiting this invention.

[0031] In the description of this invention, it should be noted that the terms "first," "second," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance.

[0032] In conclusion, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A transmission device for a circuit breaker, comprising a circuit breaker assembly (34), a support frame (32), a transmission shaft (33), a connecting rod (13), an energy storage mechanism, a closing mechanism, and a opening mechanism, characterized in that: The circuit breaker assembly (34) is connected to the upper end of the support frame (32) via a drive shaft (33). One end of the drive shaft (33) is connected to one end of the connecting rod (13) via a cam mechanism (35). The other end of the connecting rod (13) is provided with an energy storage mechanism, a closing mechanism, and a opening mechanism. The energy storage mechanism, the closing mechanism, and the opening mechanism are all fixed to the outside of the support frame (32). The energy storage mechanism includes a closing energy storage mechanism and an opening energy storage mechanism. The closing energy storage mechanism includes a drive motor (1). The motor (1) is connected to the reduction mechanism, which is connected to the crank arm (6). A closing spring (7) is provided at the rear end of the crank arm (6). The reduction mechanism includes a worm gear reducer (2). One end of the worm gear reducer (2) is connected to the drive motor (1), and the other end of the worm gear reducer (2) is connected to one end of the output shaft (3). A pinion (4) is provided at the other end of the output shaft (3). The pinion (4) meshes with a large gear (5), and the large gear (5) meshes with the crank arm (6). Arm (6) is coaxially connected; the tripping energy storage mechanism includes a cam (8), which is coaxially connected to a large gear (5), and the cam (8) is connected to a linkage transmission mechanism. The linkage transmission mechanism is connected to a connecting rod (13), and the connecting rod (13) is connected to a spring fixing rod (14). A tripping spring (15) is provided on the spring fixing rod (14), and a fixing nut (17) is provided on the spring fixing rod (14) at one end of the tripping spring (15). The fixing nut (17) is connected to the tripping spring (15). A disc (16) is provided between the brake springs (15); the linkage transmission mechanism includes a roller rocker (9), one end of which is connected to the cam (8), and the other end of which is connected to the first connecting block (11) via a connecting rod (10). The connecting rod (10), the roller rocker (9), and the first connecting block (11) are all hinged. The first connecting block (11) is coaxially connected to the second connecting block (12), and the second connecting block (12) is connected to the connecting rod (13).

2. The transmission device for a circuit breaker according to claim 1, characterized in that: The closing mechanism includes a closing button assembly, which is connected to one end of a closing connecting shaft (19). The other end of the closing connecting shaft (19) is provided with a first groove (20). The first groove (20) is connected to one end of a third connecting block (21). The other end of the third connecting block (21) is provided with a closing spring (7). The crank arm (6) connected to the closing spring (7) is coaxially connected to the cam (8).

3. The transmission device for a circuit breaker according to claim 2, characterized in that: The closing button assembly includes a first support body (24) and a first crossbar (26). The first support body (24) is located at one end of the closing connecting shaft (19). Two first arc-shaped grooves (25) are symmetrically arranged on the outer wall of the first support body (24). The first crossbar (26) passes through the two first arc-shaped grooves (25). A closing button (27) is provided on the outside of the first support body (24).

4. The transmission device for a circuit breaker according to claim 1, characterized in that: The tripping mechanism includes a tripping button assembly, which is connected to one end of a tripping connecting shaft (18). The other end of the tripping connecting shaft (18) is provided with a second groove (22), which is connected to one end of a fourth connecting block (23). The other end of the fourth connecting block (23) is connected to a roller rocker (9).

5. The transmission device for a circuit breaker according to claim 4, characterized in that: The trip button assembly includes a second support body (28) and a second crossbar (30). The second support body (28) is located at one end of the trip connecting shaft (18). Two second arc-shaped grooves (29) are symmetrically arranged on the outer wall of the second support body (28). The second crossbar (30) passes through the two second arc-shaped grooves (29). A trip button (31) is provided on the outside of the second support body (28).

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