A three-station operating mechanism

Abstract

This invention relates to the field of high-voltage electrical equipment gas-filled switchgear for power systems, and discloses a three-position operating mechanism, including a gear transmission assembly, a force-bearing plate assembly, an indicator plate assembly, and an operating lever assembly. The force-bearing plate assembly and the indicator plate assembly are threadedly connected to the gear transmission assembly, and the indicator plate assembly and the gear transmission assembly are connected by a gear and rack. The operating lever assembly is positioned and inserted into the gear transmission assembly through a shaft hole. This three-position operating mechanism provides accurate positioning in the "connect," "isolate," and "ground" working positions, without locking or jamming. Especially in the "isolate" position, it has clear stop, lock, and unlock functions, providing safety assurance for power operation and convenience for power maintenance.

Description

Technical Field

[0001] This invention relates to the field of high-voltage electrical gas-filled switchgear for power systems, specifically a three-position operating mechanism. Background Technology

[0002] Indoor AC high-voltage gas-insulated metal-enclosed switchgear (hereinafter referred to as "gas-insulated switchgear") is increasingly attracting attention from power users and enterprises in the industry due to its compact structure, small size, and strong environmental adaptability, especially in the field of rail transit electrification. Existing gas-insulated switchgear mostly adopts a linear three-position disconnector plus circuit breaker structure, particularly suitable for gas-insulated switchgear with high current of 1250A and above. Linear three-position disconnectors require a matching three-position operating mechanism to accurately connect and switch between the "connect," "isolate," and "ground" positions. However, existing three-position operating mechanisms are complex in structure and frequently experience locking, jamming, incomplete positioning, or over-positioning, causing inconvenience and safety hazards to power operation. Summary of the Invention

[0003] The purpose of this invention is to provide a three-station operating mechanism to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a three-position operating mechanism, comprising a gear transmission assembly, a force plate assembly, an indicator plate assembly, and an operating lever assembly, wherein the force plate assembly and the indicator plate assembly are threadedly connected to the gear transmission assembly, the indicator plate assembly and the gear transmission assembly are connected by a gear and rack, and the operating lever assembly is positioned and inserted into the gear transmission assembly through a shaft hole.

[0005] Preferably, the gear transmission assembly includes a main mounting plate, a limit rod, an anti-rotation block, a lower mounting plate for the worm gear, an upper mounting plate for the worm gear, a front fixed mounting plate, a support rod, a manual rotating shaft, an output worm, a transmission main shaft, a worm gear, an indicator gear, a pinion, and a large gear. The transmission main shaft and the worm gear are connected by a key. The transmission main shaft has first bearings at both ends, located between the upper and lower mounting plates for the worm gear. The upper and lower mounting plates for the worm gear are threadedly fixed to the main mounting plate. The anti-rotation block is sleeved on the upper end of the transmission main shaft. The indicator gear is sleeved on the lower end of the transmission main shaft. The pinion is fixedly connected to the front end of the output worm. The output worm has second bearings at both ends, located between the main mounting plate and the front fixed mounting plate.

[0006] Preferably, one end of the manual rotating shaft is provided with a semi-circular boss, and a large gear is fixedly installed at the end of the manual rotating shaft near the semi-circular boss. Both ends of the manual rotating shaft are provided with third bearings, located between the main mounting plate and the front fixed mounting plate. The large gear and the small gear mesh, the output worm gear and the worm wheel mesh, and the two support rods are fixedly installed between the main mounting plate and the front fixed mounting plate through the shaft ends. The front fixed mounting plate is fastened to the upper mounting plate and the lower mounting plate of the worm wheel through threaded connections.

[0007] Preferably, the force-bearing plate assembly includes a force-bearing plate, a stop block, a support plate, a base plate, a sliding pin, a tension spring, a tension pin, and a shaft pin. The sliding pin is disposed on the force-bearing plate, and the force-bearing plate is rotatably connected to the support plate above it via the shaft pin. The support plate is disposed below the force-bearing plate, and the force-bearing plate and the support plate are connected by threads. The stop block is disposed at the end of the force-bearing plate. One end of the tension spring is connected to a screw on the force-bearing plate, and the other end of the tension spring is connected to the tension pin.

[0008] Preferably, the support plate and the bearing plate of the load-bearing plate assembly are fastened to the front fixed mounting plate of the gear transmission assembly by threaded connection, and the pull pin is hooked onto the main mounting plate of the gear transmission assembly.

[0009] Preferably, the indicator plate assembly includes a three-position indicator plate, a sliding bushing, a rack plate, a front sliding bushing, and an indicator support plate. The three-position indicator plate and the rack plate are connected by threads. One side of the three-position indicator plate slides through the indicator support plate. A first long groove is formed on the three-position indicator plate, and the front sliding bushing is disposed in the first long groove. A second long groove is formed on the rack plate, and the sliding bushing is disposed in the second long groove. The indicator support plate, the front sliding bushing, and the sliding bushing are threadedly connected to the corresponding positions of the front fixed mounting plate and the worm gear lower mounting plate of the gear transmission assembly.

[0010] Preferably, the number of the sliding bushing and the front sliding bushing is two.

[0011] Preferably, the operating lever assembly includes an operating lever, a fixing pin, a bushing, a spring, a rotating shaft, a pivot pin, a stop pin, and a guide sleeve. The outer wall of the rotating shaft has a third elongated slot and a first through hole. One end of the guide sleeve has a semi-circular slot. The outer wall of the guide sleeve has an arrow-shaped slot and a second through hole. The guide sleeve has a second central hole. The rotating shaft is disposed inside the guide sleeve through the second central hole. The third elongated slot on the rotating shaft is aligned with the arrow-shaped slot on the guide sleeve. One end of the stop pin passes through the rotating shaft and the guide sleeve in sequence. The pivot pin passes through the rotating shaft and the guide sleeve in sequence and is connected to the stop pin. The spring is disposed in the first central hole of the rotating shaft. The operating lever 41 is rotatably connected through the bushing 43 and is connected through the fixing pin 42 passing through the bushing 43, the rotating shaft 45, and the operating lever 41 in sequence. The two ends of the spring 44 abut against the stop pin 47 and the fixing pin 42, respectively.

[0012] This invention provides a three-position operating mechanism. It offers the following advantages: the three-position operating mechanism accurately positions itself in the "connect," "isolate," and "ground" working positions, eliminating locking and jamming issues. Especially in the "isolate" position, it exhibits clear stop, lock, and unlock functions, providing safety assurance for power operation and facilitating power maintenance. Attached Figure Description

[0013] Figure 1 This is a three-dimensional view of the three-station operating mechanism.

[0014] Figure 2 This is a 3D view of the gear transmission assembly.

[0015] Figure 3 This is a 3D view of the load-bearing plate assembly.

[0016] Figure 4 This is a 3D view of the indicator panel assembly.

[0017] Figure 5 This is a 3D view of the joystick assembly.

[0018] Figure 6 This is a three-dimensional view of the shaft and guide sleeve.

[0019] Figure 7 This is a local 3D view of the block when it is removed from the isolation position.

[0020] Figure 8 This is a partial 3D view of the stop block and sliding pin in the isolated position.

[0021] Figure 9 This is a partial 3D view of the stop block and sliding pin in the isolated position.

[0022] Figure 10 A 3D view of the stop pin and stop when they are unlocked.

[0023] In the diagram: 1. Gear transmission assembly; 11. Mechanism mounting plate; 12. Limit rod; 13. Anti-rotation block; 14. Worm gear lower mounting plate; 15. Worm gear upper mounting plate; 16. Front fixed mounting plate; 17. Support rod; 18. Manual rotating shaft; 19. Output worm; 101. Transmission main shaft; 102. Worm gear; 103. Indicator gear; 104. Pinion; 105. Large gear; 2. Force plate assembly; 21. Force plate; 22. Stop block; 23. Support plate; 24. Support plate; 25. Sliding pin; 26. Tension spring; 27. Pull pin; 28. Shaft pin 3. Indicator plate assembly; 31. Three-position indicator plate; 32. Sliding bushing; 33. Rack plate; 34. Front sliding bushing; 35. Indicator support plate; 4. Operating lever assembly; 41. Operating lever; 42. Fixing pin; 43. Bushing; 44. Spring; 45. Rotating shaft; 46. Rotating pin; 47. Stop pin; 48. Guide sleeve; 181. Semi-circular boss; 451. Long slot; 452. First through hole; 453. First center hole; 481. Semi-circular slot; 482. Arrow-shaped slot; 483. Second through hole; 484. Second center hole. Detailed Implementation

[0024] 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.

[0025] like Figure 1-10As shown, the present invention provides a technical solution: a three-position operating mechanism, including a gear transmission assembly 1, a force plate assembly 2, an indicator plate assembly 3, and an operating lever assembly 4. The force plate assembly 2 and the indicator plate assembly 3 are threadedly connected to the gear transmission assembly 1. The indicator plate assembly 3 and the gear transmission assembly 1 are connected by a gear and rack. The operating lever assembly 4 is positioned and inserted into the gear transmission assembly 1 through a shaft hole. The gear transmission assembly 1 includes a mechanism mounting plate 11, a limit rod 12, an anti-rotation block 13, a lower worm gear mounting plate 14, an upper worm gear mounting plate 15, a front fixed mounting plate 16, a support rod 17, a manual rotating shaft 18, an output worm gear 19, a transmission main shaft 101, a worm gear 102, an indicator gear 103, a pinion 104, and a large gear 105. 01 and worm gear 102 are connected by a flat key. The transmission main shaft 101 has first bearings at both ends, located between the upper mounting plate 15 and the lower mounting plate 14 of the worm gear. The upper mounting plate 15 and the lower mounting plate 14 of the worm gear are fixedly connected to the main mounting plate 11 of the mechanism by threads. An anti-rotation block 13 is sleeved on the upper end of the transmission main shaft 101. An indicator gear 103 is sleeved on the lower end of the transmission main shaft 101. A pinion 104 is fixedly connected to the front end of the output worm 19. The output worm 19 has second bearings at both ends, located between the main mounting plate 11 of the mechanism and the front fixed mounting plate 16. A semi-circular boss 181 is provided at one end of the manual rotating shaft 18. A large gear 105 is fixedly installed at the end of the manual rotating shaft 18 near the semi-circular boss 181. The manual rotating shaft 18 has bearings at both ends... Each component is equipped with a third bearing, located between the main mounting plate 11 and the front fixed mounting plate 16. The large gear 105 and small gear 104 mesh, and the output worm 19 meshes with the worm wheel 102. Two support rods 17 are fixedly mounted between the main mounting plate 11 and the front fixed mounting plate 16 via shaft ends. The front fixed mounting plate 16 is threadedly fastened to the upper mounting plate 15 and the lower mounting plate 14 of the worm wheel. The force plate assembly 2 includes a force plate 21, a stop block 22, a support plate 23, a support plate 24, a sliding pin 25, a tension spring 26, a pull pin 27, and a shaft pin 28. The sliding pin 25 is located on the force plate 21, which is rotatably connected to the upper part of the support plate 24 via the shaft pin 28. The support plate 23 is located below the force plate 21. The force plate 21 and the support plate 24... 3. The stop block 22 is connected to the end of the force plate 21 by a threaded connection. One end of the tension spring 26 is connected to the screw on the force plate 21, and the other end of the tension spring 26 is connected to the pull pin 27. The support plate 23 and the support plate 24 of the force plate assembly 2 are fastened to the front fixed mounting plate 16 of the gear transmission assembly 1 by a threaded connection. The pull pin 27 is hooked onto the mechanism mounting plate 11 of the gear transmission assembly 1. The indicator plate assembly 3 includes a three-position indicator plate 31, a sliding bushing 32, a rack plate 33, a front sliding bushing 34, and an indicator support plate 35. The three-position indicator plate 31 and the rack plate 33 are connected by a thread. One side of the three-position indicator plate 31 slides through the indicator support plate 35. A first long groove is opened on the three-position indicator plate 31, and the front sliding bushing 34 is disposed in the first long groove.A second elongated groove is provided on the rack plate 33, and the sliding bushing 32 is disposed in the second elongated groove. The indicator support plate 35, the front sliding bushing 34, and the sliding bushing 32 are threadedly connected to the corresponding positions of the front fixed mounting plate 16 and the worm gear lower mounting plate 14 of the gear transmission assembly 1. There are two sliding bushings 32 and two front sliding bushings 34. The operating lever assembly 4 includes an operating lever 41, a fixing pin 42, a bushing 43, a spring 44, a rotating shaft 45, a stop pin 47, a pivot pin 46, and a guide sleeve 48. The outer wall of the rotating shaft 45 is provided with a third elongated groove 451 and a first through hole 452. One end of the guide sleeve 48 is provided with a semi-circular groove 481, and the outer wall of the guide sleeve 48 is provided with an arrow-shaped groove 482 and a second through hole 452. A through hole 483 is provided. A second central hole 484 is provided on the guide sleeve 48. The rotating shaft 45 is disposed inside the guide sleeve 48 through the second central hole 484. A third elongated slot 451 on the rotating shaft 45 is aligned with an arrow-shaped slot 482 on the guide sleeve 48. One end of a stop pin 47 is disposed to pass through the rotating shaft 45 and the guide sleeve 48 in sequence. A rotating pin 46 passes through the rotating shaft 45 and the guide sleeve 48 in sequence and is connected to the stop pin 47. A spring 44 is disposed in the first central hole 453 of the rotating shaft 45. An operating lever 41 is rotatably connected through a bushing 43 and is connected to the operating lever 41 by a fixing pin 42 passing through the bushing 43, the rotating shaft 45, and the operating lever 41 in sequence. The two ends of the spring 44 abut against the stop pin 47 and the fixing pin 42, respectively.

[0026] In use, the output worm gear 19 of a three-position operating mechanism gear transmission assembly 1 is connected to a linear three-position disconnect switch inside the gas cabinet via gear or sprocket transmission, and drives the three-position disconnect switch through a three-position operating mechanism to reach the required working position. According to the operating characteristics of the linear three-position disconnect switch, the "isolation" position is arranged in the middle of the disconnect switch, and the "connection" and "grounding" positions are on both sides of the disconnect switch. The "connection", "grounding" and "isolation" positions of the three-position operating mechanism connected to the three-position disconnect switch are symmetrically arranged. The semi-circular slot 481 of the guide sleeve 48 of the operating rod assembly 4 is connected to the gear transmission assembly 1. The semi-circular boss 181 of the manual rotating shaft 18 is aligned, and the semi-circular boss 181 of the manual rotating shaft 18 is inserted into the semi-circular slot 481 of the guide sleeve 48 of the operating lever assembly 4 until the slot and boss are in the limit position. At the same time, the semi-circular boss 181 of the manual rotating shaft 18 pushes the rotating shaft 45 of the operating lever assembly 4, so that the stop pin 47 connected to it reaches the middle position of the arrow-shaped slot 482 of the guide sleeve 48. The operating lever 41 of the operating lever assembly 4 is rotated, which drives the manual rotating shaft 18 to rotate. Then, through the large gear 105 on the manual rotating shaft 18 and the small gear 104 on the output worm gear 19, the output worm gear 19 is driven to rotate. The output worm gear 19 then drives the output worm gear 19 to rotate. The worm gear 102 rotates, and the transmission main shaft 101 rotates with it. The rotation of the transmission main shaft 101 has two effects: first, it drives the three-position indicator plate 31 connected to the rack plate 33 to move left and right through the indicator gear 103 below it to indicate the working position; second, it drives the anti-rotation block 13 above it to rotate. When the three-position isolating switch is in the middle position between "on" and "off" and between "off" and "grounded", the anti-rotation block 13 and the sliding pin 25 on the force plate 21 are disengaged. The force plate 21 rests against the front fixed mounting plate 16 through the tension spring 26, and the stop block 22 connected to the force plate 21 moves away from the stop pin 47 of the operating lever assembly 4, so that the operating lever... When component 4 rotates, it is unaffected. When the three-position disconnect switch reaches the "on" or "grounded" working position, the two limit rods 12 are set on the mounting plate 15 on the worm gear and collide with the anti-rotation block 13 to limit the position, ensuring accurate positioning. When the three-position disconnect switch moves from the "on" position to the "isolation" position or from the "grounded" position to the "isolation" position, the front end of the anti-rotation block 13 pushes the sliding pin 25 to the top of the anti-rotation block 13. At this time, the stop block 22 connected to the force plate 21 blocks the stop pin 47 of the operating rod component 4. The stop pin 47 moves to the two corner ends of the arrow-shaped slot 482 of the guide sleeve 48 and stops, ensuring accurate isolation and achieving the isolation and locking function.For the three-position disconnect switch to continue moving from the "isolation" position to the "connection" or "grounding" position, the operating lever assembly 4 must be removed from the three-position operating mechanism. Under the action of the spring 44, the stop pin 47 on the operating lever assembly 4 slides from the two corners of the arrow-shaped slot 482 on the guide sleeve 48 to the top of the arrow-shaped slot 482. Then, the operating lever assembly 4 is reinserted into the semi-circular boss 181 of the manual rotating shaft 18, pushing the stop pin 47, which is connected to the rotating shaft 45 of the operating lever assembly 4, to the middle position of the arrow-shaped slot 482 on the guide sleeve 48. Because the end face of the stop block 22 blocks the stop pin 47, the stop pin 47 rotates along the axis of the rotating shaft 45. After rotating a certain angle, the lever assembly 4 can slide left and right along the end face of the stop block 22 without preventing the operation lever assembly 4 from rotating. Continuing to rotate causes the stop pin 47 to slide off the end face of the stop block 22. Under the action of the spring 44, the stop pin 47 is in a vertical state. Further rotation of the operation lever assembly 4 causes the anti-rotation block 13 and the sliding pin 25 on the force plate 21 to disengage. The force plate 21 rests against the front fixed mounting plate 16 via the tension spring 26. The stop block 22 connected to the force plate 21 moves away from the stop pin 47 of the operation lever assembly 4, allowing the three-position disconnect switch to reach either the "on" or "grounded" working position, thus achieving the isolation and unlocking function.

[0027] As illustrated in the above embodiments, a three-position operating mechanism has a simple structure, flexible operation, and is safe and reliable. The three working positions of "connection", "isolation" and "grounding" are accurately positioned without locking or jamming. In particular, the "isolation" position has obvious positioning, stopping, locking and unlocking functions, which are smooth and provide safety assurance for power operation and convenience for power maintenance.

[0028] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A three-position operating mechanism, comprising a gear transmission assembly (1), a force plate assembly (2), an indicator plate assembly (3), and an operating lever assembly (4), characterized in that: The force plate assembly (2) and the indicator plate assembly (3) are threadedly connected to the gear transmission assembly (1). The indicator plate assembly (3) and the gear transmission assembly (1) are connected by a gear rack. The operating lever assembly (4) is positioned and inserted into the gear transmission assembly (1) through a shaft hole. The gear transmission assembly (1) includes a mechanism mounting plate (11), a limit rod (12), an anti-rotation block (13), a worm gear lower mounting plate (14), a worm gear upper mounting plate (15), a front fixed mounting plate (16), a support rod (17), a manual rotating shaft (18), an output worm (19), a transmission main shaft (101), a worm gear (102), an indicator gear (103), a pinion (104), and a large gear (105). The transmission main shaft (101) and the worm gear (102) are connected by a flat key. The transmission main shaft (101) is provided with first bearings at both ends, located on the worm gear upper mounting plate (15) and the worm gear lower mounting plate (16). Between the plates (14), the upper mounting plate (15) and the lower mounting plate (14) of the worm wheel are fixedly connected to the main mounting plate (11) of the mechanism by threads. The anti-rotation block (13) is sleeved on the upper end of the transmission main shaft (101). The indicator gear (103) is sleeved on the lower end of the transmission main shaft (101). The pinion (104) is fixedly connected to the front end of the output worm (19). The output worm (19) is provided with second bearings at both ends, located between the main mounting plate (11) of the mechanism and the front fixed mounting plate (16). Two limit rods (12) are set on the upper mounting plate (15) of the worm wheel and are limited by contact with the anti-rotation block (13). One end of the manual rotating shaft (18) is provided with a semi-circular boss (181). A large gear (105) is fixedly installed at the end of the manual rotating shaft (18) near the semi-circular boss (181). Both ends of the manual rotating shaft (18) are provided with third bearings, located between the main mounting plate (11) and the front fixed mounting plate (16). The large gear (105) meshes with the small gear (104). The output worm (19) meshes with the worm wheel (102). The two support rods (17) are fixedly installed between the main mounting plate (11) and the front fixed mounting plate (16) through the shaft end. The front fixed mounting plate (16) is fastened to the upper mounting plate (15) and the lower mounting plate (14) of the worm wheel by threaded connection. The indicator plate assembly (3) includes a three-position indicator plate (31), a sliding bushing (32), a rack plate (33), a front sliding bushing (34), and an indicator support plate (35). The three-position indicator plate (31) and the rack plate (33) are connected by threads. One side of the three-position indicator plate (31) slides through the indicator support plate (35). A first long groove is provided on the three-position indicator plate (31). The front sliding bushing (34) is disposed in the first long groove. A second long groove is provided on the rack plate (33). The sliding bushing (32) is disposed in the second long groove. The indicator support plate (35), the front sliding bushing (34), and the sliding bushing (32) are threadedly connected to the corresponding positions of the front fixed mounting plate (16) and the worm gear lower mounting plate (14) of the gear transmission assembly (1).

2. The three-station operating mechanism according to claim 1, characterized in that: The force plate assembly (2) includes a force plate (21), a stop (22), a support plate (23), a support plate (24), a sliding pin (25), a tension spring (26), a pull pin (27), and a shaft pin (28). The sliding pin (25) is disposed on the force plate (21). The force plate (21) is rotatably connected to the support plate (24) above by the shaft pin (28). The support plate (23) is disposed below the force plate (21). The force plate (21) and the support plate (23) are connected by threads. The stop (22) is disposed at the end of the force plate (21). One end of the tension spring (26) is connected to a screw on the force plate (21), and the other end of the tension spring (26) is connected to the pull pin (27).

3. The three-station operating mechanism according to claim 2, characterized in that: The support plate (23) and the support plate (24) of the load-bearing plate assembly (2) are fastened to the front fixed mounting plate (16) of the gear transmission assembly (1) by threaded connection, and the pull pin (27) is hooked on the mechanism mounting plate (11) of the gear transmission assembly (1).

4. The three-station operating mechanism according to claim 1, characterized in that: The number of the sliding bushing (32) and the front sliding bushing (34) are both two.

5. A three-station operating mechanism according to claim 4, characterized in that: The operating lever assembly (4) includes an operating lever (41), a fixing pin (42), a bushing (43), a spring (44), a rotating shaft (45), a rotating pin (46), a stop pin (47), and a guide sleeve (48). The outer wall of the rotating shaft (45) has a third elongated slot (451) and a first through hole (452). One end of the guide sleeve (48) has a semi-circular slot (481). The outer wall of the guide sleeve (48) has an arrow-shaped slot (482) and a second through hole (483). The guide sleeve (48) has a second central hole (484). The rotating shaft (45) is disposed inside the guide sleeve (48) through the second central hole (484). The third long slot (451) on the 45) faces the arrow-shaped slot (482) on the guide sleeve (48). One end of the stop pin (47) passes through the rotating shaft (45) and the guide sleeve (48) in sequence. The rotating pin (46) passes through the rotating shaft (45) and the guide sleeve (48) in sequence and is connected to the stop pin (47). The spring (44) is set in the first center hole (453) of the rotating shaft (45). The operating rod (41) is rotatably connected through the bushing (43) and is connected through the fixing pin (42) in sequence through the bushing (43), the rotating shaft (45) and the operating rod (41). The two ends of the spring (44) abut against the stop pin (47) and the fixing pin (42) respectively.

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