Double-spring-driven three-station operating mechanism
The double-spring driven mechanism simplifies and compacts the load switch structure by eliminating indicating mechanisms and enhancing torque, addressing complexity and space issues in existing three-position operating mechanisms.
Patent Information
- Application Number
- CN202420835221.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-22
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-04-22
AI Technical Summary
Existing three-position operating mechanisms for load switches have complex structures due to the need for additional indicating mechanisms, increased spatial volume, and reduced torque, making them costly and difficult to operate, especially in extreme positions.
A double-spring driven mechanism with independent isolation and grounding operation components, where springs are located outside the output shaft, eliminating the need for indicating mechanisms and optimizing the output cam's trajectory for enhanced torque.
The mechanism simplifies structure, reduces cost, and provides greater torque, ensuring smooth operation even in extreme positions, while minimizing spatial requirements.
Smart Images
Figure CN222190495U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of ring network cabinet mechanisms, in particular to a double-spring driven three-station operating mechanism. Background Art
[0002] The three-position operating mechanism realizes the closing, opening and grounding states of the operating mechanism by rotating the output shaft in three positions (operating mechanism closing position, operating mechanism opening position and operating mechanism grounding position). The three-position operating mechanism is provided with an operating mechanism operating shaft and a grounding shaft. The operating mechanism operating shaft rotates between the power-on closing position and the power-off opening position, and the grounding shaft rotates back and forth between the grounding closing position and the grounding opening position.
[0003] Chinese utility model patent 202020832144.4 discloses a three-position mechanism for a load switch, wherein an upper crank arm and an upper driving cam are fixedly arranged on the load switch operating shaft, a lower crank arm and a lower driving cam are fixedly arranged on the grounding operating shaft, a closing and opening spring is connected between the upper crank arm and the lower crank arm, the upper crank arm and the lower crank arm respectively drive the output cam to rotate through the driving cam, and then the output cam drives the output shaft to reciprocate between the three positions. The operating mechanism of this load switch has the following problems: (1) The upper crank arm and the lower crank arm of the operating mechanism are connected by a closing and opening spring. When the output reciprocates between the three working positions, the movement trajectory of the closing and opening spring will cross the output shaft. In order to prevent the output shaft from interfering with the closing and opening spring, the output shaft cannot pass through the entire mechanism. The output shaft can only be passed through the rear plate, and then the position of the output shaft is led to the indicating shaft passed through the front plate through the gear transmission structure of the closing and opening indicating mechanism; that is, a closing and opening indicating mechanism needs to be provided between the output shaft and the indicating shaft to lead the position, which not only increases the number of matching mechanisms required in the operating mechanism, making the structure of the operating mechanism more complex and the cost higher, but also the operating mechanism needs to reserve installation space for the closing and opening indicating mechanism, which increases the overall spatial volume of the switch and increases the requirements for installation space. (2) The upper driving groove on the output cam of the operating mechanism for cooperating with the upper driving pin (arranged on the upper driving cam of the operating shaft of the operating mechanism) includes a grounding opening and closing track segment and an isolating opening and closing track segment. The angle between the starting point and the end point of the grounding opening and closing track segment of the output cam and the line connecting the center point of the output shaft is set relatively large. The knife switch of the switch has a small torque. When the grounding opening and closing is performed, it is easy to make the knife switch difficult to open in the grounding closing position, especially in the extreme position, the difficulty of opening will be higher. Utility Model Content
[0004] In view of the shortcomings of the operating mechanism of the above-mentioned existing load switches, the applicant provides a rationally structured double-spring driven three-position operating mechanism, which adopts a double-spring structure. The movement trajectory of the spring is located outside the output shaft, and the output shaft runs through the mechanism setting, which saves the use of the indicating mechanism, simplifies the structure, reduces the cost, and reduces the spatial volume of the switch; the grounding opening and closing trajectory of the driving groove of the output cam is optimized through a multi-parameter formula to increase the torque of the knife switch, so that the knife switch is convenient to separate when it is in the grounding closing position.
[0005] The technical solution adopted by the utility model is as follows:
[0006] A double-spring driven three-station operating mechanism, an output shaft, an isolation operating component, and a grounding operating component are arranged on a fixed plate, an output cam is sleeved on the output shaft, the isolation operating component and the grounding operating component cooperate with the output cam respectively, and the output shaft is passed through the fixed plate; an isolation spring is arranged between the isolation operating component and the fixed plate, one end of the isolation spring is connected to the isolation operating component, and the other end is connected to the fixed plate; a grounding spring is arranged between the grounding operating component and the fixed plate, one end of the grounding spring is connected to the grounding operating component, and the other end is connected to the fixed plate.
[0007] As a further improvement of the above technical solution:
[0008] The connection points of the isolation spring and the grounding spring with the fixing plate are arranged close to each other on the same side of the fixing plate, and the isolation spring and the isolation operation component are arranged substantially symmetrically with the grounding spring and the grounding operation component.
[0009] The isolation spring and the grounding spring are arranged in a V shape.
[0010] The isolation operation component includes an isolation operation shaft, an isolation crank arm, and an isolation drive cam. The isolation operation shaft is inserted into a fixed plate. The isolation crank arm and the isolation drive cam are fixedly sleeved on the isolation operation shaft. One end of the isolation spring is connected to the isolation crank arm and the other end is connected to the fixed plate.
[0011] The grounding operation assembly includes a grounding operation shaft, a grounding crank arm, and a grounding drive cam. The grounding operation shaft is inserted into a fixed plate. The grounding crank arm and the grounding drive cam are fixedly sleeved on the grounding operation shaft. One end of the grounding spring is connected to the grounding crank arm and the other end is connected to the fixed plate.
[0012] An isolation drive groove and a grounding drive groove are provided on the output cam; an isolation drive pin is provided on the isolation drive cam of the isolation operation component, and the isolation drive pin cooperates with the isolation drive groove; a grounding drive pin is provided on the grounding drive cam of the grounding operation component, and the grounding drive pin of the grounding drive cam cooperates with the grounding drive groove.
[0013] The isolation drive groove of the output cam includes an isolation opening and closing trajectory segment, a grounding opening and closing trajectory segment, and a locking segment. The starting point of the isolation opening and closing trajectory segment and the starting point of the grounding opening and closing trajectory segment are the same point; the isolation opening and closing trajectory segment includes a first arc segment, a second arc segment and a straight line segment; the grounding drive groove is a U-shaped opening groove or a V-shaped opening groove with a large groove mouth and a small groove bottom.
[0014] The width w of the isolation drive groove is greater than or equal to the outer diameter of the isolation drive pin, and the width w is 14.2mm-18.2mm; the radius R0 of the transition fillet of the inner and outer contour lines of the connection point between the isolation opening and closing track section and the grounding opening and closing track section is 3mm-7mm; the straight-line distance b1 of the line BO connecting the end point B of the isolation opening and closing track section and the center point O is 96mm-100mm; the angle α between BO and the X-axis is 28°-38°; the angle β between AO and BO, the line connecting the starting point A, the end point B and the center point O of the isolation opening and closing track section, is 67.5°-77.5°; the locking section is connected along the BO line The first arc segment protrudes outward relative to the grounding opening and closing track segment to form a limit step at the opening point; the radius R1' of the inner contour arc line of the first arc segment is 6mm-10mm, and the radius R1" of the outer contour arc line is 22.2mm-26.2mm; the radius R2 of the center line of the second arc segment is in the range of 81mm-85mm; the angle θ between the line AO and CO connecting the starting point A, the end point C and the center point O of the grounding opening and closing track segment is 54°-64°; the grounding opening and closing track segment is an arc segment, and the radius R3 of its center line is 50.6mm-54.6mm.
[0015] The ground drive groove includes a first groove side, a second groove side and a groove bottom; the angle γ between the first groove side and the Y-axis is 31.4°-41.4°; the angle δ between the second groove side and the Y-axis is 16°-26°; the groove bottom is semicircular, the radius R4 of the groove bottom is greater than or equal to the radius of the ground drive pin, the radius R4 ranges from 6mm to 10mm, the distance b2 from the center point of the groove bottom to the X-axis ranges from 11.4mm to 15.4mm, and the distance b3 to the Y-axis ranges from 23.6mm to 27.6mm.
[0016] The isolation operation component cooperates with the output cam to realize clockwise closing and counterclockwise opening of isolation; the grounding operation component cooperates with the output cam to realize clockwise closing and counterclockwise opening of grounding; the output shaft passes through the middle of the fixed plate, the isolation operation component is arranged in the area above the output shaft, and the grounding operation component is arranged in the area below the output shaft.
[0017] The beneficial effects of the utility model are as follows:
[0018] The isolation operation component and the grounding operation component of the utility model respectively adopt independent springs, and the spring output force is larger, thereby being able to provide a larger torque, ensuring that a larger torque can be output at the extreme position, and avoiding the dead angle area of the connecting rod mechanism; the isolation operation component and the grounding operation component do not need to be linked by the spring, the isolation operation component and the grounding operation component are independent of each other, and the movement trajectories of the isolation spring and the grounding spring are also independent of each other, and the movement trajectories of the isolation spring and the grounding spring in the opening and closing switch are always located outside the output shaft and do not cross the output shaft, thus leaving a position and space for the output shaft to pass through, so that the output shaft can pass through the entire mechanism setting, saving the use of the indicating mechanism, simplifying the structure of the operating mechanism, reducing the cost, and saving the installation space of the operating mechanism; the isolation spring and the isolation operation component of the utility model are basically symmetrically arranged with the grounding spring and the grounding operation component, and the parts are basically similar, so that the operating mechanism can be set to be smaller, simple, compact and reliable, which is convenient for fault finding; at the same time, it can provide greater spring force and torque, reduce the spatial volume of the operating mechanism, and reduce the requirements for installation space.
[0019] The isolation opening and closing track section of the output cam of the utility model is provided with two arc sections transitioning to a straight line section, and the transition is smoother and gentler, which is more conducive to the opening and closing operation of the switch knife. The angle of the grounding opening and closing track section of the output cam is smaller, so that the switch knife obtains a greater torque, and when the grounding opening and closing is performed, the knife switch is easier to separate in the grounding closing position, especially in the extreme position, so that the knife switch can also be opened smoothly. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a schematic diagram of the utility model in the switch opening position.
[0021] Figure 2 It is a schematic diagram of the utility model in the switch closing position.
[0022] Figure 3 It is a schematic diagram of the utility model in the switch connection position.
[0023] Figure 4 This is a schematic diagram of the structure of the output cam.
[0024] In the figure: 1. fixed plate; 2. output shaft;
[0025] 3. Isolation operation assembly; 31. Isolation operation shaft; 32. Isolation crank arm; 33. Isolation drive cam; 331. Isolation drive pin; 34. Isolation spring;
[0026] 4. grounding operation assembly; 41. grounding operation shaft; 42. grounding crank arm; 43. grounding drive cam; 431. grounding drive pin; 44. grounding spring;
[0027] 5. Output cam; 51. Output mounting hole; 52. Isolation drive slot; 520. Center line of slot body; 521. Isolation opening and closing track segment; 5211. First arc segment; 5212. Second arc segment; 5213. Straight line segment; 522. Grounding opening and closing track segment; 523. Locking segment; 53. Grounding drive slot; 531. First slot side; 532. Second slot side; 533. Slot bottom. DETAILED DESCRIPTION
[0028] The specific implementation of the present utility model is described below in conjunction with the accompanying drawings.
[0029] First of all, it should be noted that Figures 1 to 3 The perspectives shown are all from the back to the front, that is, in the figure, the isolation operating component 3, the grounding operating component 4 and the output cam 5 are all arranged on the back side of the fixed plate 1, so Figures 1 to 3 The movement direction shown in the shown direction (back side) is exactly opposite to the movement direction shown in the front side, that is, the clockwise direction shown in the back side is the counterclockwise direction of the front side, and the counterclockwise direction shown in the back side is the clockwise direction of the front side.
[0030] like Figures 1 to 3 As shown, the output shaft 2, the isolation operation component 3, and the grounding operation component 4 are arranged on the fixed plate 1 of the utility model, the output shaft 2 is arranged in the middle of the fixed plate 1, the isolation operation component 3 is arranged in the area above the output shaft 2, the grounding operation component 4 is arranged in the area below the output shaft 2, and the output cam 5 is fixedly sleeved on the output shaft 2. The isolation operation component 3 cooperates with the output cam 5 to realize the isolation clockwise closing and counterclockwise opening; the grounding operation component 4 cooperates with the output cam 5 to realize the grounding clockwise closing and counterclockwise opening; the isolation operation component 3 and the grounding operation component 4 are both closed by clockwise and opened by counterclockwise, which is more in line with the operation logic of the operator, more friendly to the operation of the operator, and more conducive to reducing the risk of misoperation.
[0031] The isolation operation assembly 3 includes an isolation operation shaft 31, an isolation crank arm 32, an isolation drive cam 33 and an isolation spring 34. The isolation operation shaft 31 is inserted into the fixed plate 1, the isolation crank arm 32 and the isolation drive cam 33 are fixedly sleeved on the isolation operation shaft 31 and can rotate with the isolation operation shaft 31, one end of the isolation spring 34 is connected to the isolation crank arm 32 through a pin, and the other end is connected to the fixed plate 1 through a pin, and the isolation drive cam 33 is provided with an isolation drive pin 331.
[0032] The grounding operation assembly 4 includes a grounding operation shaft 41, a grounding crank arm 42, a grounding drive cam 43 and a grounding spring 44. The grounding operation shaft 41 is passed through the fixed plate 1. The grounding crank arm 42 and the grounding drive cam 43 are fixedly sleeved on the grounding operation shaft 41 and can rotate with the grounding operation shaft 41. One end of the grounding spring 44 is connected to the grounding crank arm 42 through a pin, and the other end is connected to the fixed plate 1 through a pin. A grounding drive pin 431 is provided on the grounding drive cam 43.
[0033] The connection points of the isolation spring 34 and the grounding spring 44 with the fixing plate 1 are arranged close to each other on the same side of the fixing plate 1 in a V-shape, which can improve the space utilization rate of the same side of the fixing plate 1 and is conducive to making the structure more compact and reasonable.
[0034] The output cam 5 is provided with an output mounting hole 51, an isolation driving groove 52 and a grounding driving groove 53. The output shaft 2 is inserted into the output mounting hole 51; the isolation driving pin 331 of the isolation driving cam 33 is inserted into the isolation driving groove 52, and the isolation driving pin 331 cooperates with the isolation driving groove 52 and moves along the track defined by the isolation driving groove 52; the grounding driving pin 431 of the grounding driving cam 43 cooperates with the grounding driving groove 53.
[0035] like Figures 1 to 3 As shown, the isolation operation component 3 and the grounding operation component 4 of the utility model respectively adopt independent springs, and the isolation operation component 3 and the grounding operation component 4 do not need to be linked by the spring. The isolation operation component 3 and the grounding operation component 4 are independent of each other, and the movement trajectories of the isolation spring 34 and the grounding spring 44 are also independent of each other. Moreover, the movement trajectories of the isolation spring 34 and the grounding spring 44 in the opening and closing switch are always located outside the output shaft 2 and do not cross the output shaft 2. In this way, a position and space for the output shaft 2 to pass through is made available, so that the output shaft 2 can pass through the entire mechanism setting, saving the use of the indicating mechanism, simplifying the structure of the operating mechanism, reducing the cost, and saving the installation space of the operating mechanism, so that the operating mechanism can be set to be smaller and more compact, reducing the spatial volume of the operating mechanism, and reducing the requirements for the installation space.
[0036] like Figure 4 As shown, the specific structure of the output cam 5 is shown. In the figure, the X-axis is the horizontal axis passing through the center point O of the output mounting hole 51, the Y-axis is the vertical axis passing through the center point O, and the center line 520 of the slot body is the center axis of the isolation drive slot 52.
[0037] The isolation driving groove 52 is opened along the trajectory defined by the center line 520 of the groove body according to the set groove width w. The groove width w of the isolation driving groove 52 is greater than or equal to the outer diameter of the isolation driving pin 331, and the range of the groove width w is 14.2mm-18.2mm.
[0038] The isolation drive slot 52 includes an isolation opening and closing track segment 521, a grounding opening and closing track segment 522, and a locking segment 523. In the figure, on the center line 520 of the slot body, the isolation opening and closing track segment 521 is a track segment defined by the AB line segment, the grounding opening and closing track segment 522 is a track segment defined by the AC line segment, and the locking segment 523 is a track segment defined by the BD line segment. The inner and outer contours of each track segment are transitioned through fillets respectively; the radius R0 of the transition fillet of the inner and outer contours of the connection point between the isolation opening and closing track segment 521 and the grounding opening and closing track segment 522 is in the range of 3mm-7mm. Point A is the isolation opening point and also the grounding opening point, that is, Point A is the starting point of the isolation opening and closing track segment 521 and also the starting point of the grounding opening and closing track segment 522.
[0039] The straight-line distance b1 between the end point B (isolating closing point) of the isolating opening and closing track segment 521 and the line BO connecting the center point O is in the range of 96mm-100mm, and the angle α between BO and the X-axis is 28°-38°. The locking segment 523 extends outward along the direction of the BO line, that is, the extension line of the BD line passes through the center point O. The angle β between the line AO connecting the starting point A, the end point B and the center point O of the isolating opening and closing track segment 521 and BO is 67.5°-77.5°. The isolating opening and closing track segment 521 includes a first arc segment 5211, a second arc segment 5212 and a straight line segment 5213. In the figure, on the center line 520 of the slot body, the first arc segment 5211 is a track segment defined by the AE line segment, the second arc segment 5212 is a track segment defined by the EF line segment, and the straight line segment 5213 is a track segment defined by the FB line segment. The isolating opening and closing track segment 521 is provided with two arc segments to transition to the straight line segment 5213, and the transition is smoother and gentler, which is more conducive to the opening and closing operation of the switch knife. The first arc segment 5211 protrudes outward relative to the grounding opening and closing track segment 522, and forms a limit step at point A (i.e., the opening point), as shown in FIG. Figure 1 As shown, when in the open position, the limiting step limits the isolation drive pin 331. The radius R1' of the inner contour arc of the first arc segment 5211 ranges from 6mm to 10mm, and the radius R1" of the outer contour arc ranges from 22.2mm to 26.2mm; the radius R2 of the center line of the second arc segment 5212 ranges from 81mm to 85mm.
[0040] The angle θ between the lines AO and CO connecting the starting point A, the end point C and the center point O of the grounding opening and closing track segment 522 is 54°-64°. Compared with the prior art, the angle of the grounding opening and closing track segment 522 of the output cam 5 of the utility model is reduced, so that the knife switch of the switch obtains a larger torque, and when the grounding opening and closing is performed, the knife switch is easier to separate in the grounding closing position, especially in the extreme position, so that the knife switch can also be opened smoothly. The grounding opening and closing track segment 522 is an arc segment, and the radius R3 of its center line ranges from 50.6mm to 54.6mm.
[0041] The ground driving groove 53 is a U-shaped opening groove or a V-shaped opening groove with a large groove opening and a small groove bottom. The ground driving groove 53 includes a first groove side 531, a second groove side 532 and a groove bottom 533; the angle γ between the first groove side 531 and the Y axis is 31.4°-41.4°; the angle δ between the second groove side 532 and the Y axis is 16°-26°; the groove bottom 533 is semicircular, the radius R4 of the groove bottom 533 is greater than or equal to the radius of the ground driving pin 431, the radius R4 ranges from 6mm to 10mm, the distance b2 from the center point of the groove bottom 533 to the X axis ranges from 11.4mm to 15.4mm, and the distance b3 to the Y axis ranges from 23.6mm to 27.6mm.
[0042] When the utility model is actually used, when isolating and closing the switch: Figure 1 , Figure 2 As shown, when the isolation operation shaft 31 of the isolation operation component 3 rotates clockwise, the isolation crank arm 32 and the isolation drive cam 33 rotate clockwise, thereby driving the output cam 5 from the isolation opening position to the isolation closing position through the isolation drive pin 331; conversely, when the isolation operation shaft 31 rotates counterclockwise, the isolation drive pin 331 drives the output cam 5 from the isolation closing position to the isolation opening position; when the isolation operation component 3 moves, the grounding operation component 4 does not move. When the grounding is opened and closed: Figure 1 , Figure 3 As shown, when the grounding operation shaft 41 of the grounding operation component 4 rotates clockwise, the grounding crank arm 42 and the grounding drive cam 43 are driven to rotate clockwise, thereby driving the output cam 5 from the grounding opening position to the grounding closing position through the grounding drive pin 431; conversely, when the grounding operation shaft 41 rotates counterclockwise, the grounding drive pin 431 drives the output cam 5 from the grounding closing position to the grounding opening position; when the grounding operation component 4 moves, the isolation operation component 3 does not move.
[0043] The above description is an explanation of the utility model, not a limitation of the utility model. The utility model can be modified in any form without violating the spirit of the utility model.
Claims
1. A double-spring driven three-position operating mechanism, wherein an output shaft (2), an isolation operating component (3), and a grounding operating component (4) are arranged on a fixed plate (1), an output cam (5) is sleeved on the output shaft (2), and the isolation operating component (3) and the grounding operating component (4) are respectively matched with the output cam (5), characterized in that: The output shaft (2) is inserted into the fixed plate (1); an isolation spring (34) is arranged between the isolation operating component (3) and the fixed plate (1); one end of the isolation spring (34) is connected to the isolation operating component (3), and the other end is connected to the fixed plate (1); a grounding spring (44) is arranged between the grounding operating component (4) and the fixed plate (1); one end of the grounding spring (44) is connected to the grounding operating component (4), and the other end is connected to the fixed plate (1).
2. The double-spring driven three-position operating mechanism according to claim 1, characterized in that: The connection points of the isolation spring (34) and the grounding spring (44) with the fixed plate (1) are arranged close to each other on the same side of the fixed plate (1), and the isolation spring (34) and the isolation operation component (3) and the grounding spring (44) and the grounding operation component (4) are arranged substantially symmetrically.
3. The double-spring driven three-position operating mechanism according to claim 2, characterized in that: The isolation spring (34) and the grounding spring (44) are arranged in a V shape.
4. The double-spring driven three-position operating mechanism according to claim 1, characterized in that: The isolation operation assembly (3) comprises an isolation operation shaft (31), an isolation crank arm (32), and an isolation drive cam (33); the isolation operation shaft (31) is inserted into the fixed plate (1); the isolation crank arm (32) and the isolation drive cam (33) are fixedly sleeved on the isolation operation shaft (31); and one end of the isolation spring (34) is connected to the isolation crank arm (32) and the other end is connected to the fixed plate (1).
5. The double-spring driven three-position operating mechanism according to claim 1, characterized in that: The grounding operation assembly (4) comprises a grounding operation shaft (41), a grounding crank arm (42), and a grounding drive cam (43); the grounding operation shaft (41) is inserted into the fixed plate (1); the grounding crank arm (42) and the grounding drive cam (43) are fixedly sleeved on the grounding operation shaft (41); and a grounding spring (44) has one end connected to the grounding crank arm (42) and the other end connected to the fixed plate (1).
6. The double-spring driven three-position operating mechanism according to claim 1, characterized in that: An isolation drive groove (52) and a grounding drive groove (53) are provided on the output cam (5); an isolation drive pin (331) is provided on the isolation drive cam (33) of the isolation operation component (3), and the isolation drive pin (331) cooperates with the isolation drive groove (52); a grounding drive pin (431) is provided on the grounding drive cam (43) of the grounding operation component (4), and the grounding drive pin (431) of the grounding drive cam (43) cooperates with the grounding drive groove (53).
7. The double-spring driven three-position operating mechanism according to claim 6, characterized in that: The isolation drive groove (52) of the output cam (5) comprises an isolation opening and closing track segment (521), a grounding opening and closing track segment (522), and a locking segment (523); the starting point of the isolation opening and closing track segment (521) and the starting point of the grounding opening and closing track segment (522) are at the same point; the isolation opening and closing track segment (521) comprises a first arc segment (5211), a second arc segment (5212), and a straight line segment (5213); and the grounding drive groove (53) is a U-shaped opening groove or a V-shaped opening groove with a large groove opening and a small groove bottom.
8. The double-spring driven three-position operating mechanism according to claim 7, characterized in that: The groove width w of the isolation driving groove (52) is greater than or equal to the outer diameter of the isolation driving pin (331), and the groove width w is 14.2 mm-18.2 mm; the radius R0 of the transition fillet of the inner and outer contour lines of the connection point between the isolation opening and closing track section (521) and the grounding opening and closing track section (522) is 3 mm-7 mm; the straight line distance b1 of the line BO connecting the end point B of the isolation opening and closing track section (521) and the center point O is 96 mm-100 mm; the angle α between BO and the X-axis is 28°-38°; the angle β between AO connecting the starting point A, the end point B and the center point O of the isolation opening and closing track section (521) and BO is 67.5°-77.5°; the locking section (523) is connected along BO The first arc segment (5211) protrudes outward relative to the grounding opening and closing track segment (522), forming a limit step at the opening point; the radius R1' of the inner contour arc of the first arc segment (5211) is 6mm-10mm, and the radius R1" of the outer contour arc is 22.2mm-26.2mm; the radius R2 of the center line of the second arc segment (5212) is in the range of 81mm-85mm; the angle θ between the connecting line AO and CO of the starting point A, the end point C and the center point O of the grounding opening and closing track segment (522) is 54°-64°; the grounding opening and closing track segment (522) is an arc segment, and the radius R3 of its center line is 50.6mm-54.6mm.
9. The double-spring driven three-position operating mechanism according to claim 7, characterized in that: The ground drive groove (53) comprises a first groove side (531), a second groove side (532) and a groove bottom (533); an angle γ between the first groove side (531) and the Y axis is 31.4°-41.4°; an angle δ between the second groove side (532) and the Y axis is 16°-26°; the groove bottom (533) is semicircular, a radius R4 of the groove bottom (533) is greater than or equal to a radius of the ground drive pin (431), the radius R4 ranges from 6 mm to 10 mm, a distance b2 from the center point of the groove bottom (533) to the X axis ranges from 11.4 mm to 15.4 mm, and a distance b3 to the Y axis ranges from 23.6 mm to 27.6 mm.
10. The double-spring driven three-position operating mechanism according to claim 1, characterized in that: The isolation operation component (3) cooperates with the output cam (5) to realize clockwise closing and counterclockwise opening of isolation; the grounding operation component (4) cooperates with the output cam (5) to realize clockwise closing and counterclockwise opening of grounding; the output shaft (2) is arranged in the middle of the fixed plate (1), the isolation operation component (3) is arranged in the area above the output shaft (2), and the grounding operation component (4) is arranged in the area below the output shaft (2).