A three-station operating mechanism

Abstract

The application relates to a three-station operating mechanism, belonging to the technical field of switch devices, which comprises an operating plate, a grounding operating shaft, an isolation operating shaft and an output shaft which are rotationally arranged on the operating plate, the grounding operating shaft and the isolation operating shaft are symmetrically arranged on the two sides of the output shaft, a motor for controlling the rotation of the grounding operating shaft or the isolation operating shaft is arranged on the operating plate, the output shaft is rotated to a closing position, an opening position or a grounding position through the rotation of the grounding operating shaft or the isolation operating shaft. The three-station operating mechanism in the application is driven in an electric mode, compared with traditional manual operation, the degree of automation is improved, and the three-station operating mechanism provided in the application has a compact structure, so that the occupied space is effectively saved.

Description

Technical Field

[0001] This application relates to the technical field of switchgear, and in particular to a three-position operating mechanism. Background Technology

[0002] The three-position operating mechanism is a core component of power switchgear. It can switch between three distinct working positions: closing, opening (isolation), and grounding. It integrates the functions of disconnecting switches and grounding switches, and has the characteristics of mechanical interlocking to prevent misoperation. It is widely used in medium and high voltage power distribution systems.

[0003] Existing three-station operating mechanisms suffer from problems such as large size, complex transmission methods, numerous parts assembly processes, and high difficulty in parts processing. Therefore, there is an urgent need to develop a more compact three-station operating mechanism. Summary of the Invention

[0004] In order to provide a more compact three-station operating mechanism, this application provides a three-station operating mechanism.

[0005] The three-station operating mechanism provided in this application adopts the following technical solution: A three-position operating mechanism includes an operating panel and a grounding operating shaft, an isolation operating shaft, and an output shaft rotatably mounted on the operating panel. The grounding operating shaft and the isolation operating shaft are symmetrically arranged on both sides of the output shaft. The operating panel is provided with a control component for controlling the rotation of the grounding operating shaft or the isolation operating shaft. By rotating the grounding operating shaft or the isolation operating shaft, the output shaft is rotated to the closed, open, or grounded position. The grounding operating shaft is provided with a grounding rotor that rotates with the grounding operating shaft, the isolation operating shaft is provided with an isolation rotor that rotates with the isolation operating shaft, the output shaft is provided with a linkage plate that rotates with the output shaft, and both ends of the linkage plate are provided with connecting rods. The grounding rotor and the isolation rotor are both provided with arc-shaped linkage grooves, and the connecting rods are provided with linkage columns that cooperate with the linkage grooves. One end of the linkage groove is called the closing end, and the other end of the linkage groove is called the opening end. When the output shaft is in the open position, the linkage columns at both ends of the linkage plate are all located at the open end of the corresponding linkage slide groove. When the isolation operating shaft rotates to the closed position of the output shaft, the linkage column corresponding to the isolation rotor is located at the closed end of the linkage slide groove on the isolation rotor; When the grounding operating shaft rotates to the grounding position, the linkage column corresponding to the grounding operating shaft is located at the closing end of the linkage slide groove on the grounding rotor.

[0006] By adopting the above technical solution, through the cooperation of the linkage plate, the connecting rods set at both ends of the linkage plate, and the linkage grooves on the isolation rotor and the grounding rotor, it is possible not only to transmit the grounding operating shaft or the isolation operating shaft to the output shaft, so that the output shaft rotates by the corresponding angle, but also to restrict the rotation of the grounding operating shaft when the output shaft is in the closed position, and to restrict the rotation of the isolation operating shaft when the output shaft is in the grounded position. This meets the five-proof requirements, and the structure is more compact than the three-position operating mechanism in the prior art, which can reduce the size of the switchgear.

[0007] Preferably, a control shaft is provided between the isolation operating shaft and the grounding operating shaft, the isolation operating shaft is provided with a sliding bracket that rotates with the isolation operating shaft, and the grounding operating shaft is provided with a fixed bracket that rotates with the grounding operating shaft. A fixed column is rotatably connected to the fixed bracket. A fixed block is provided at one end of the control shaft facing the fixed bracket. A fixed arc groove adapted to the fixed column is opened on the fixed block. The inner wall of the fixed arc groove fits against the outer wall of the fixed column. The control shaft rotates about the fixed column as the axis of rotation. A telescopic block is rotatably connected to the sliding bracket. A control through hole for sliding of the control shaft is provided through the telescopic block. A fixing part that fits against the fixing block is provided at one end of the control shaft near the fixed bracket. A sliding part is sleeved on the other end of the control shaft near the fixed bracket. The sliding part is slidably disposed on the control shaft. A control spring is sleeved on the control shaft. One end of the control spring abuts against the sliding part, and the other end of the control spring abuts against the fixing part.

[0008] By adopting the above technical solution, the cooperation of the control shaft, fixed bracket, sliding bracket, fixed part, sliding part and control spring can not only achieve the effect of cooperating with the isolation motor / grounding motor to make the isolation rotor / grounding rotor rotate into position quickly, but also limit the rotation angle of the isolation rotor / grounding rotor to a certain extent, because the telescopic block will limit the sliding length of the sliding part, thus ensuring the safe use of the mechanism.

[0009] Preferably, the operating panel is provided with a grounding limit post and an isolation limit post, the grounding rotor is provided with a grounding limit groove that cooperates with the grounding limit post, and the isolation rotor is provided with an isolation limit groove that cooperates with the isolation limit post.

[0010] Preferably, the operation panel is provided with a linkage limit post, and the linkage limit post and the output shaft are located on the same straight line in the vertical direction.

[0011] By adopting the above technical solution, the safety of the device during use is further guaranteed, and the situation of excessive rotation of the isolation rotor or grounded rotor is prevented.

[0012] Preferably, the control component includes a grounding motor and an isolation motor. The grounding motor is used to drive the grounding operating shaft to rotate, and the isolation motor is used to drive the isolation operating shaft to rotate. The output shaft is provided with a positioning plate that rotates with the output shaft. The operating panel is equipped with a grounding micro switch and an isolating micro switch that cooperate with the positioning plate. The grounding micro switch is electrically connected to the grounding motor, and the isolating micro switch is electrically connected to the isolating motor. When the output shaft is in the open position, the positioning plate is positioned between the grounding micro switch and the isolating micro switch. When the output shaft is in the closed position, the positioning plate is positioned towards the isolating micro switch. When the output shaft is in the grounded position, the positioning plate is positioned towards the grounding micro switch.

[0013] By adopting the above technical solution, the positioning plate can work with the grounding micro switch to cut off the power supply to the grounding motor, thereby improving the safety of using the motor-controlled isolation operating shaft or the grounding operating shaft.

[0014] Preferably, a door lock shaft for controlling the opening and closing of the lower door of the switch equipment is slidably connected to the operation panel. The operation panel is provided with a door control bracket for guiding the door lock shaft. A pressing plate is provided at the end of the door lock shaft away from the ground. A door lock spring is sleeved on the door lock shaft. The door lock spring is used to push the pressing plate to drive the door lock shaft to slide in a direction away from the ground. The grounding operating shaft is equipped with a door control plate that rotates with the grounding operating shaft. The door control plate is equipped with a locking point and an opening point. When the output shaft is in the closed or open position, the locking point of the door control plate is in contact with the pressing plate. When the output shaft is in the grounded position, the opening point of the door control plate is in contact with the pressing plate.

[0015] By adopting the above technical solution, the opening and closing of the lower door of the switchgear can be synchronously controlled by the rotation of the grounded operating shaft, effectively ensuring safety.

[0016] Preferably, the operating plate is provided with a buffer plate and a buffer limiting post for supporting the buffer plate. The buffer plate rotates about the buffer limiting post as the rotation axis. The output shaft is provided with a buffer mating plate that rotates with the output shaft. During the process of the output shaft rotating from the open position to the closed position, the buffer plate and the buffer mating plate cooperate to buffer the closing force. The buffer limiting post is provided with a reset elastic element for resetting the buffer plate.

[0017] By adopting the above technical solution, during the process of the output shaft rotating from the open position to the closed position, the buffer plate and the buffer mating plate work together to buffer the closing force, which makes it less likely to cause damage to equipment components due to excessive closing force caused by impact, and can ensure the accuracy of mechanical positioning to a certain extent.

[0018] Preferably, the linkage plate is provided with a clearance slope.

[0019] By adopting the above technical solution, the setting of the inclined surface makes it less likely for the linkage plate to interfere with the buffer limit post when it rotates.

[0020] Preferably, both ends of the grounding limiting groove are provided with grounding clearance arc grooves that cooperate with the grounding limiting post, and both ends of the isolation limiting groove are provided with isolation clearance arc grooves that cooperate with the isolation limiting post.

[0021] By adopting the above technical solution and setting the ground clearance arc groove, if the grounding rotor collides with the grounding limit post, the contact area between the grounding rotor and the grounding limit post is increased compared with the case without the ground clearance arc groove, which effectively disperses the impact force and can reduce the damage to the operating mechanism to a certain extent.

[0022] Preferably, the isolation rotor is provided with a dividing hole.

[0023] By adopting the above technical solution, it is easy to distinguish between the isolation rotor and the grounded rotor during the assembly process of the three-station operating mechanism.

[0024] In summary, this application includes at least one of the following beneficial technical effects: 1. Through the cooperation of the linkage plate, the connecting rods set at both ends of the linkage plate, and the linkage grooves on the isolation rotor and the grounding rotor, it is possible not only to transmit the grounding operation shaft or the isolation operation shaft to the output shaft, so that the output shaft rotates by the corresponding angle, but also to restrict the rotation of the grounding operation shaft when the output shaft is in the closed position, and to restrict the rotation of the isolation operation shaft when the output shaft is in the grounded position, which meets the five protection requirements. Moreover, the structure is more compact than the three-position operating mechanism in the prior art, which can reduce the size of the switchgear. In addition, both the grounding operation shaft and the isolation operation shaft in this application are started by motors, which improves the degree of automation compared to manual operation. 2. The positioning plate can be used with a grounding micro switch to cut off the power supply to the grounded motor, or with an isolation micro switch to cut off the power supply to the isolated motor, thereby improving the safety of controlling the grounding or isolation operating shaft via the motor. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure when the output shaft is in the open position in this embodiment of the application.

[0026] Figure 2 This is a schematic diagram of the overall structure from another perspective in the embodiments of this application.

[0027] Figure 3 This is a schematic diagram of the operating panel when the output shaft is in the open position in this embodiment of the application.

[0028] Figure 4 This is a schematic diagram of the output shaft being in the open position in an embodiment of this application.

[0029] Figure 5 This is a schematic diagram of the output shaft in the isolated position in an embodiment of this application.

[0030] Figure 6 This is a schematic diagram of the output shaft being in the grounded position in an embodiment of this application.

[0031] Figure 7 This is a schematic diagram of the overall structure when the output shaft is in the ground position in the embodiment of this application.

[0032] Figure 8 This is a schematic diagram of the control axis in an embodiment of this application.

[0033] Explanation of reference numerals in the attached drawings: 1. Operation panel; 11. Mounting plate; 12. Rear panel; 13. Grounding limit post; 14. Isolation limit post; 15. Linkage limit post; 2. Grounding operating shaft; 21. Grounding rotor; 211. Grounding limit groove; 212. Grounding clearance arc groove; 22. Grounding motor; 221. Grounding micro switch; 23. Fixed bracket; 231. Fixed post; 24. Door control panel; 241. Locking point; 242. Opening point; 3. Isolation operating shaft; 31. Isolation rotor; 311. Isolation limit groove; 312. Isolation clearance arc groove; 32. Differentiating hole; 33. Isolation motor; 331. Isolation micro switch; 34. Sliding bracket 341. Telescopic block; 342. Control through hole; 4. Output shaft; 41. Linkage plate; 411. Yielding slope; 42. Positioning plate; 5. Linkage part; 51. First plate; 52. Second plate; 53. Rotating column; 54. Linkage column; 6. Linkage slide groove; 61. Closing end; 62. Opening end; 7. Control shaft; 71. Fixing block; 711. Fixing arc groove; 72. Fixing part; 73. Sliding part; 74. Control spring; 8. Locking shaft; 81. Door control bracket; 811. Mounting limit post; 82. Pressing plate; 83. Locking spring; 9. Buffer plate; 91. Buffer limit post; 92. Buffer mating plate; 93. Reset torsion spring. Detailed Implementation

[0034] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail.

[0035] This application discloses a three-station operating mechanism, as shown in the embodiments below. Figure 1 and Figure 2The three-position operating mechanism includes an operation panel 1, a mounting plate 11, a rear plate 12, and a grounding operating shaft 2, an isolation operating shaft 3, and an output shaft 4 rotatably mounted on the operation panel 1. The output shaft 4 is the core transmission component of the three-position operating mechanism. In this embodiment, its main function is to accurately convert the movement of the grounding operating shaft 2 and the isolation operating shaft 3 into switching of the switch knife switch between the three positions of closing, opening, and grounding. The operation panel 1 is equipped with a control component for controlling the rotation of the grounding operating shaft 2 or the isolation operating shaft 3. The rotation of the grounding operating shaft 2 or the isolation operating shaft 3 causes the output shaft 4 to rotate to the closing, opening, or grounding position. The grounding operating shaft 2 and the isolation operating shaft 3 pass through the operation panel 1, while the output shaft 4 passes through the operation panel 1, the mounting plate 11, and the rear plate 12.

[0036] Reference Figure 3 The grounding operation shaft 2 and the isolation operation shaft 3 are symmetrically arranged on both sides of the output shaft 4. The grounding operation shaft 2 is provided with a grounding rotor 21 that rotates with the grounding operation shaft 2, and the isolation operation shaft 3 is provided with an isolation rotor 31 that rotates with the isolation operation shaft 3. The isolation rotor 31 is provided with a distinguishing hole 32 for easy identification during installation. The output shaft 4 is provided with a linkage plate 41 that rotates with the output shaft 4. Both ends of the linkage plate 41 are provided with a connecting rod 5. The connecting rod 5 is composed of a first plate 51, a second plate 52, a rotating column 53, and a linkage column 54. The rotating column 53 and the linkage column 54 are located between the first plate 51 and the second plate 52, and the rotating column 53 and the linkage column 54 are respectively located at both ends of the first plate 51. The linkage plate 41 is provided with a rotating through hole for the rotating column 53 to pass through. The connecting rod 5 rotates about the rotating column 53 as the axis of rotation. After installation, the linkage plate 41 is located between the first plate 51 and the second plate 52, so that the connecting rod 5 is not easy to detach from the linkage plate 41.

[0037] Reference Figure 3 and Figure 4 Both the grounding rotor 21 and the isolation rotor 31 are provided with arc-shaped linkage grooves 6. The linkage column 54 on the connecting rod part 5 of the linkage plate 41 near the grounding rotor 21 is slidably disposed in the linkage groove 6 on the grounding rotor 21. The linkage column 54 on the connecting rod part 5 of the linkage plate 41 near the isolation rotor 31 is slidably disposed in the linkage groove 6 on the isolation rotor 31, so that the grounding rotor 21 and the isolation rotor 31 are also located between the first plate 51 and the second plate 52.

[0038] Reference Figure 4 , Figure 5 and Figure 6For clarity and intuitiveness, the first plate 51 in the connecting rod 5 has been removed from these three attached figures. When the output shaft 4 is in the open position, the end of the linkage groove 6 closest to the output shaft 4 is called the open end 62, and the other end is called the closed end 61. The linkage column 54 in the linkage groove 6 of the grounding rotor 21 is in contact with the open end 62 of the linkage groove 6. The linkage column 54 in the linkage groove 6 of the isolation rotor 31 is in contact with the open end 62 of the linkage groove 6. The rotation of the isolation operating shaft 3 or the rotation of the grounding operating shaft 2 must be performed when the output shaft 4 is in the open position.

[0039] When the output shaft 4 needs to be rotated to the closed position, the control component drives the isolation operating shaft 3 to rotate. The isolation operating shaft 3 first drives the isolation rotor 31 to rotate until the closing end 61 of the linkage groove 6 on the isolation rotor 31 is in contact with the linkage column 54. Then, as the isolation operating shaft 3 continues to rotate, the isolation rotor 31 can push the connecting rod part 5 near the isolation rotor 31 to slide. Through the sliding of the connecting rod part 5, the linkage plate 41 and the output shaft 4 rotate around the output shaft 4 as the rotation axis. During this process, the linkage column 54 on the connecting rod part 5 near the grounding rotor 21 slides along the linkage groove 6 on the grounding rotor 21 until the output shaft 4 rotates to the closed position, stopping the rotation of the isolation operating shaft 3. At this time, the linkage plate 41 and the connecting rod part 5 near the grounding rotor 21 are basically in a straight line. If the grounding operating shaft 2 is controlled to rotate at this time, the grounding rotor 21 will cooperate with the corresponding connecting rod part 5 to restrict the rotation of the grounding operating shaft 2, ensuring the safety of the switchgear during use.

[0040] Similarly, when the output shaft 4 needs to be rotated to the ground position, the grounding operation shaft 2 is rotated by the control component. The grounding operation shaft 2 first drives the grounding rotor 21 to rotate until the closing end 61 of the linkage groove 6 on the grounding rotor 21 is in contact with the linkage column 54. Then, as the grounding operation shaft 2 continues to rotate, the grounding rotor 21 can push the connecting rod part 5 near the grounding rotor 21 to slide. Through the sliding of the connecting rod part 5, the linkage plate 41 and the output shaft 4 rotate around the output shaft 4 as the rotation axis. During this process, the linkage column 54 on the connecting rod part 5 near the isolation rotor 31 slides along the linkage groove 6 on the isolation rotor 31 until the output shaft 4 rotates to the ground position, stopping the rotation of the grounding operation shaft 2. At this time, the linkage plate 41 and the connecting rod part 5 near the isolation rotor 31 are basically in a straight line. If the isolation operation shaft 3 is controlled to rotate at this time, the isolation rotor 31 will cooperate with the corresponding connecting rod part 5 to restrict the rotation of the isolation operation shaft 3, ensuring the safety of the switchgear during use.

[0041] To reduce friction between the linkage column 54 and the inner wall of the linkage groove 6 when the linkage column 54 slides within the linkage groove 6, the linkage column 54 can be rotatably connected to the first plate 51 and the second plate 52. Through the cooperation of the linkage plate 41, the connecting rods 5 set at both ends of the linkage plate 41, and the linkage grooves 6 on the isolation rotor 31 and the grounding rotor 21, not only can the grounding operation shaft 2 or the isolation operation shaft 3 be transmitted to the output shaft 4, causing the output shaft 4 to rotate by the corresponding angle, but also the rotation of the grounding operation shaft 2 can be restricted when the output shaft 4 is in the closed position, and the rotation of the isolation operation shaft 3 can be restricted when the output shaft 4 is in the grounded position, which meets the five-proof requirements.

[0042] Reference Figure 1 and Figure 7 The control components include a grounding motor 22 and an isolation motor 33. The grounding motor 22 drives the grounding operating shaft 2 to rotate, and the isolation motor 33 drives the isolation operating shaft 3 to rotate. The output shaft 4 is provided with a positioning plate 42 that rotates with the output shaft 4. The positioning plate 42 is located on the side of the operating plate 1 away from the mounting plate 11. The side of the operating plate 1 away from the mounting plate 11 is also provided with a grounding micro switch 221 and an isolation micro switch 331 that cooperate with the positioning plate 42. The positioning plate 42 can cooperate with the grounding micro switch 221 to cut off the power supply of the grounding motor 22, and the positioning plate 42 can also cooperate with the isolation micro switch 331 to cut off the power supply of the isolation motor 33, so that the grounding micro switch 221 is connected in series with the grounding motor 22, and the isolation micro switch 331 is connected in series with the isolation motor 33.

[0043] When the output shaft 4 is in the open position, the positioning plate 42 is located between the grounding micro switch 221 and the isolating micro switch 331. When the isolating motor 33 drives the isolating operating shaft 3 to rotate until the positioning plate 42 pushes the push rod of the isolating micro switch 331, the power supply of the isolating motor 33 is cut off, and the output shaft 4 is in the closed position. When the grounding motor 22 drives the grounding operating shaft 2 to rotate until the positioning plate 42 pushes the push rod of the grounding micro switch 221, the power supply of the grounding motor 22 is cut off, and the output shaft 4 is in the grounded position.

[0044] Reference Figure 1 and Figure 7A control shaft 7 is provided between the isolation operation shaft 3 and the grounding operation shaft 2. The isolation operation shaft 3 has a sliding bracket 34 that rotates with it. The grounding operation shaft 2 has a fixed bracket 23 that rotates with it. A fixed column 231 is rotatably connected to the fixed bracket 23. A fixed block 71 is provided at one end of the control shaft 7 facing the fixed bracket 23. The fixed block 71 has a fixed arc groove 711 adapted to the fixed column 231. The inner wall of the fixed arc groove 711 fits against the outer wall of the fixed column 231. The fixed column 231 rotates about its own axis, while the control shaft 7 rotates about the fixed column 231. The sliding bracket 34 is rotatably connected to a telescopic block 341. The telescopic block 341 has a through hole 342 for the sliding of the control shaft 7. The end of the control shaft 7 near the fixed bracket 23 has a fixing part 72 that fits with the fixing block 71. The end of the control shaft 7 near the fixed bracket 23 has a sliding part 73 that slides on the control shaft 7. A control spring 74 is fitted on the control shaft 7. One end of the control spring 74 abuts against the sliding part 73, and the other end of the control spring 74 abuts against the fixing part 72. The fixing block 71 is kept in contact with the fixing post 231 under the action of the control spring 74.

[0045] When the output shaft 4 needs to rotate from the open position to the closed position, the rotation of the isolating operating shaft 3 will first shorten the distance between the sliding part 73 and the fixed part 72, so that the control spring 74 is in a compressed state. When the isolating operating shaft 3 rotates to a certain angle, the sliding part 73 will instantly reset under the elastic action of the spring. In this process, the isolating rotor 31 will rotate to the designated position. The same principle applies when the output shaft 4 needs to rotate from the open position to the grounding position. The cooperation of the control shaft 7, the fixed bracket 23, the sliding bracket 34, the fixed part 72, the sliding part 73, and the control spring 74 can achieve the effect of cooperating with the isolating motor 33 / grounding motor 22 to make the isolating rotor 31 / grounding rotor 21 rotate into position quickly. At the same time, it can limit the rotation angle of the isolating rotor 31 / grounding rotor 21 to a certain extent because the telescopic block 341 limits the sliding length of the sliding part, thus ensuring the safe use of the mechanism.

[0046] Reference Figure 3 and Figure 4 To further ensure the safety of the device during use and prevent excessive rotation of the isolation rotor 31 or the grounding rotor 21, the operation panel 1 is provided with a grounding limit post 13 and an isolation limit post 14. The grounding rotor 21 is provided with a grounding limit groove 211 that cooperates with the grounding limit post 13, and the isolation rotor 31 is provided with an isolation limit groove 311 that cooperates with the isolation limit post 14. In addition, the operation panel 1 is also provided with a linkage limit post 15, which is located on the same straight line as the output shaft 4 in the vertical direction.

[0047] Both ends of the grounding limiting groove 211 are provided with grounding clearance arc grooves 212 that cooperate with the grounding limiting post 13, and both ends of the isolation limiting groove 311 are provided with isolation clearance arc grooves 312 that cooperate with the isolation limiting post 14. By setting the grounding clearance arc grooves 212, if the grounding rotor 21 collides with the grounding limiting post 13, compared with the absence of grounding clearance arc grooves 212, the contact area between the grounding rotor 21 and the grounding limiting post 13 is increased, effectively dispersing the impact force and reducing the damage to the operating mechanism to a certain extent.

[0048] Reference Figure 1 and Figure 7 The control panel 1 is slidably connected to a door lock shaft 8 for controlling the opening and closing of the lower door of the switch equipment. The control panel 1 is provided with a door control bracket 81 for guiding the door lock shaft 8. The door control bracket 81 is fixed to the control panel 1 by a mounting limit post 811. The end of the door lock shaft 8 away from the ground is provided with a pressing plate 82. A door lock spring 83 is sleeved on the door lock shaft 8. The door lock spring 83 is used to push the pressing plate 82 to drive the door lock shaft 8 to slide away from the ground. The grounding control shaft 2 is provided with a door control plate 24 that rotates with the grounding control shaft 2. The door control plate 24 is irregularly shaped and is provided with a door lock point 241 and a door open point 242.

[0049] When the output shaft 4 is in the closed or open position, the locking point 241 of the door control plate 24 is in contact with the pressing plate 82. As the output shaft 4 rotates from the open position towards the grounded position, the rotation of the grounding operating shaft 2 drives the door control plate 24 to rotate synchronously. The pressing plate 82 remains in contact with the door control plate 24 under the action of the locking spring 83. When the output shaft 4 rotates to the grounded position, the opening point 242 of the door control plate 24 is in contact with the pressing plate 82. A locking groove can be directly provided on the lower door of the switchgear for the locking shaft 8 to slide into after insertion, locking the lower door in conjunction with the locking shaft 8. Alternatively, locking can be achieved through other structural mechanisms. The rotation of the grounding operating shaft 2 controls the opening and closing of the lower door, effectively ensuring the safety of the switchgear during use.

[0050] Reference Figure 3 and Figure 8The operating plate 1 is equipped with a buffer plate 9, and a buffer limiting post 91 for supporting the buffer plate 9. The buffer plate 9 rotates around the buffer limiting post 91. The output shaft 4 is equipped with a buffer mating plate 92 that rotates with the output shaft 4. During the process of the output shaft 4 rotating from the open position to the closed position, the buffer plate 9 and the buffer mating plate 92 work together to buffer the closing force, which is less likely to cause damage to equipment components due to excessive closing force, and can also ensure the accuracy of mechanical positioning to a certain extent. The buffer limiting post 91 is equipped with a reset elastic element for resetting the buffer plate 9. In this embodiment, the reset elastic element is a reset torsion spring 93. One end of the reset torsion spring 93 is fixed to the operating plate 1, and the other end of the reset torsion spring 93 is fixed to the buffer plate 9. The linkage plate 41 is equipped with a clearance slope 411. The clearance slope 411 makes it less likely for the linkage plate 41 to interfere with the buffer limiting post 91 when rotating.

[0051] One end of the grounding limit post 13, the isolation limit post 14, the buffer limit post 91, and the mounting limit post 811 are fixed to the operating plate 1 by bolts, and the other end is fixed to the mounting plate 11 by bolts. The above-mentioned limit posts can not only cooperate with the normal operation of other components, but also limit the distance between the operating plate 1 and the mounting plate 11. The rear plate 12 and the mounting plate 11 are connected by rods.

[0052] The implementation principle of the workstation operating mechanism in Embodiment 3 of this application is as follows.

[0053] When the output shaft 4 is in the open position, the linkage column 54 in the linkage groove 6 of the grounding rotor 21 is in contact with the open end 62 of the linkage groove 6, and the linkage column 54 in the linkage groove 6 of the isolation rotor 31 is in contact with the open end 62 of the linkage groove 6. At this time, the positioning plate 42 is located between the grounding micro switch 221 and the isolation micro switch 331.

[0054] When the output shaft 4 needs to rotate to the closed position, the isolation motor 33 drives the isolation operating shaft 3 to rotate. The isolation operating shaft 3 first drives the isolation rotor 31 to rotate until the closing end 61 of the linkage groove 6 on the isolation rotor 31 is in contact with the linkage column 54. Then, the rotation of the isolation rotor 31 pushes the connecting rod part 5 to slide, and the sliding of the connecting rod part 5 drives the linkage plate 41 and the output shaft 4 to rotate around the output shaft 4 as the rotation axis. During this process, the rotation of the isolation operating shaft 3 will first shorten the distance between the sliding part 73 and the fixed part 72, so that the control spring 74 is in a compressed state. When the isolation operating shaft 3 rotates to a certain angle, the sliding part 73 will instantly reset under the elastic action of the spring, pushing the isolation rotor 31 to rotate to the designated position. During this process, the buffer plate 9 and the buffer mating plate 92 cooperate to buffer the closing force. When the output shaft 4 is in the closed position, the positioning plate 42 points to the isolation micro switch 331 and cuts off the power supply to the isolation motor 33.

[0055] When the output shaft 4 needs to be rotated to the ground position, the grounding motor 22 drives the grounding operation shaft 2 to rotate. The grounding operation shaft 2 first drives the grounding rotor 21 to rotate until the closing end 61 of the linkage slide groove 6 on the grounding rotor 21 is in contact with the linkage column 54. Then, the rotation of the grounding rotor 21 pushes the connecting rod part 5 to slide, and the sliding of the connecting rod part 5 drives the linkage plate 41 and the output shaft 4 to rotate around the output shaft 4 as the rotation axis. During this process, the rotation of the grounding operation shaft 2 will first shorten the distance between the sliding part 73 and the fixed part 72, so that the control spring 74 is in a compressed state. When the grounding operation shaft 2 rotates to a certain angle, the sliding part 73 will be instantly reset under the elastic action of the spring, pushing the grounding rotor 21 to rotate to the designated position. At this time, the output shaft 4 is in the ground position, the positioning plate 42 points to the grounding micro switch 221, and cuts off the power supply of the grounding motor 22. During this process, the grounding operating shaft 2 will drive the door control plate 24 to rotate until the door opening point 242 of the door control plate 24 is in contact with the pressing plate 82, thereby releasing the lock on the lower door of the switchgear.

[0056] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A three-station operating mechanism, characterized in that, It includes an operation panel (1) and a grounding operation shaft (2), an isolation operation shaft (3) and an output shaft (4) rotatably mounted on the operation panel (1). The grounding operation shaft (2) and the isolation operation shaft (3) are symmetrically arranged on both sides of the output shaft (4). The operation panel (1) is provided with a control component for controlling the rotation of the grounding operation shaft (2) or the isolation operation shaft (3). By rotating the grounding operation shaft (2) or the isolation operation shaft (3), the output shaft (4) is rotated to the closed, open or grounded position. The grounding operation shaft (2) is provided with a grounding rotor (21) that rotates with the grounding operation shaft (2), the isolation operation shaft (3) is provided with an isolation rotor (31) that rotates with the isolation operation shaft (3), the output shaft (4) is provided with a linkage plate (41) that rotates with the output shaft (4), both ends of the linkage plate (41) are provided with a connecting rod (5), the grounding rotor (21) and the isolation rotor (31) are provided with an arc-shaped linkage groove (6), the connecting rod (5) is provided with a linkage column (54) that cooperates with the linkage groove (6), one end of the linkage groove (6) is called the closing end (61), and the other end of the linkage groove (6) is called the opening end (62); When the output shaft (4) is in the open position, the linkage columns (54) at both ends of the linkage plate (41) are all located at the open end (62) of the corresponding linkage slide (6); When the isolation operation shaft (3) rotates to the output shaft (4) in the closed position, the linkage column (54) corresponding to the isolation rotor (31) is located at the closed end (61) of the linkage slide groove (6) on the isolation rotor (31); When the grounding operation shaft (2) rotates to the output shaft (4) in the grounding position, the linkage column (54) corresponding to the grounding operation shaft (2) is located at the closing end (61) of the linkage slide (6) on the grounding rotor (21).

2. The three-station operating mechanism according to claim 1, characterized in that, A control shaft (7) is provided between the isolation operation shaft (3) and the grounding operation shaft (2). A sliding bracket (34) is provided on the isolation operation shaft (3) to rotate with the isolation operation shaft (3). A fixed bracket (23) is provided on the grounding operation shaft (2) to rotate with the grounding operation shaft (2). A fixed column (231) is rotatably connected to the fixed bracket (23). A fixed block (71) is provided at one end of the control shaft (7) facing the fixed bracket (23). A fixed arc groove (711) adapted to the fixed column (231) is provided on the fixed block (71). The inner wall of the fixed arc groove (711) is in contact with the outer wall of the fixed column (231). The control shaft (7) rotates about the fixed column (231) as the axis of rotation. A telescopic block (341) is rotatably connected to the sliding bracket (34). A control through hole (342) for sliding of the control shaft (7) is provided through the telescopic block (341). A fixing part (72) that fits with the fixing block (71) is provided at one end of the control shaft (7) near the fixed bracket (23). A sliding part (73) is sleeved at one end of the control shaft (7) near the fixed bracket (23). The sliding part (73) is slidably disposed on the control shaft (7). A control spring (74) is sleeved on the control shaft (7). One end of the control spring (74) abuts against the sliding part (73), and the other end of the control spring (74) abuts against the fixing part (72).

3. The three-station operating mechanism according to claim 1, characterized in that, The operation panel (1) is provided with a grounding limit post (13) and an isolation limit post (14). The grounding rotor (21) is provided with a grounding limit groove (211) that cooperates with the grounding limit post (13). The isolation rotor (31) is provided with an isolation limit groove (311) that cooperates with the isolation limit post (14).

4. The three-station operating mechanism according to claim 3, characterized in that, The operation panel (1) is provided with a linkage limit post (15), and the linkage limit post (15) and the output shaft (4) are located on the same straight line in the vertical direction.

5. The three-station operating mechanism according to claim 1, characterized in that, The control component includes a grounding motor (22) and an isolation motor (33). The grounding motor (22) is used to drive the grounding operation shaft (2) to rotate, and the isolation motor (33) is used to drive the isolation operation shaft (3) to rotate. The output shaft (4) is provided with a positioning plate (42) that follows the rotation of the output shaft (4). The operation panel (1) is equipped with a grounding micro switch (221) and an isolation micro switch (331) that cooperate with the positioning plate (42). The grounding micro switch (221) is electrically connected to the grounding motor (22), and the isolation micro switch (331) is electrically connected to the isolation motor (33). When the output shaft (4) is in the open position, the positioning plate (42) points between the grounding micro switch (221) and the isolation micro switch (331). When the output shaft (4) is in the closed position, the positioning plate (42) points to the isolation micro switch (331). When the output shaft (4) is in the grounded position, the positioning plate (42) points to the grounding micro switch (221).

6. The three-station operating mechanism according to claim 5, characterized in that, The operation panel (1) is slidably connected to a door lock shaft (8) for controlling the opening and closing of the lower door of the switch equipment. The operation panel (1) is provided with a door control bracket (81) for guiding the door lock shaft (8). A pressing plate (82) is provided at the end of the door lock shaft (8) away from the ground. A door lock spring (83) is sleeved on the door lock shaft (8). The door lock spring (83) is used to push the pressing plate (82) to drive the door lock shaft (8) to slide in a direction away from the ground. The grounding operation shaft (2) is provided with a door control plate (24) that rotates with the grounding operation shaft (2). The door control plate (24) is provided with a locking point (241) and an opening point (242). When the output shaft (4) is in the closed or open position, the locking point (241) of the door control plate (24) is in contact with the pressing plate (82). When the output shaft (4) is in the grounding position, the opening point (242) of the door control plate (24) is in contact with the pressing plate (82).

7. The three-station operating mechanism according to claim 6, characterized in that, The operation plate (1) is provided with a buffer plate (9) and a buffer limiting post (91) for supporting the buffer plate (9). The buffer plate (9) rotates about the buffer limiting post (91) as the rotation axis. The output shaft (4) is provided with a buffer mating plate (92) that rotates with the output shaft (4). During the process of the output shaft (4) rotating from the open position to the closed position, the buffer plate (9) and the buffer mating plate (92) work together to buffer the closing force. The buffer limiting post (91) is provided with a reset elastic element for resetting the buffer plate (9).

8. The three-station operating mechanism according to claim 7, characterized in that, The linkage plate (41) is provided with a clearance slope (411).

9. The three-station operating mechanism according to claim 2, characterized in that, Both ends of the grounding limiting groove (211) are provided with grounding clearance arc grooves (212) that cooperate with the grounding limiting post (13), and both ends of the isolation limiting groove (311) are provided with isolation clearance arc grooves (312) that cooperate with the isolation limiting post (14).

10. The three-station operating mechanism according to claim 1, characterized in that, The isolation rotor (31) is provided with a dividing hole (32).

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