CN221766617U - A dual-motor three-position switch operating mechanism - Google Patents

Abstract

The utility model discloses a double-motor three-station switch operating mechanism, which is characterized in that an isolation operating mechanism, a grounding operating mechanism and an indicating shaft are arranged between a first supporting plate and a second supporting plate, an isolation toggle plate matched with an isolation limiting plate in a blocking connection manner is rotatably arranged on the isolation operating shaft of the isolation operating mechanism, a grounding toggle plate matched with the grounding limiting plate in a blocking connection manner is rotatably arranged on the grounding operating shaft of the grounding operating mechanism, an energy storage mechanism is arranged between the isolation limiting plate and the grounding limiting plate, the indicating shaft is respectively hinged with the isolation toggle plate and the grounding limiting plate through a steering mechanism, a cam is arranged at the upper end of the indicating shaft, the isolation operating shaft is rotated by the isolation motor through a first transmission part, the grounding operating shaft is rotated by the grounding motor through a second transmission part, a third supporting plate is arranged above the second supporting plate, and a micro switch matched with the cam is arranged on the third supporting plate. The utility model realizes the automation of the switch operation, optimizes the structure, ensures that the integral stability of the mechanism is higher, and reduces the later maintenance cost.

Description

A dual-motor three-position switch operating mechanism

Technical Field

The utility model relates to the technical field of isolating switches, and more specifically, to a dual-motor three-position switch operating mechanism.

Background Art

The existing three-position disconnectors have been widely used in power systems. Their advantage is that they can realize convenient operation of power equipment under the premise of ensuring safety. However, with the continuous expansion of the scale of power systems and the continuous improvement of the reliability and convenience requirements of disconnectors, some problems in the design, performance and application of the existing three-position disconnectors have gradually been exposed. First of all, from the design point of view, the existing three-position disconnectors have certain limitations in structure. Due to its relatively complex design, the manufacturing and maintenance costs are high. In addition, from the application point of view, the existing three-position disconnectors also have certain shortcomings in actual operation. For example, during operation, due to the coordination problem between the grounding switch and the disconnector, the operation sequence may be unreasonable, thereby increasing the risk of equipment failure. Although the existing three-position disconnectors are widely used in power systems, there are still certain problems and shortcomings. Therefore, in response to these problems, researchers need to continuously optimize the design and performance of the three-position disconnectors to improve their reliability and stability in power systems as well as their convenience and safety performance during use.

Summary of the invention

In order to solve the technical problems that the existing three-position isolating switch has a complex structure, poor operation convenience and cannot adapt to the needs of automation development, the utility model innovatively provides a dual-motor three-position switch operating mechanism to improve the reliability and stability of the three-position isolating switch in the power system as well as the convenience and safety performance during use.

To achieve the above technical objectives, the embodiment of the utility model discloses a dual-motor three-position switch operating mechanism, including a first support plate, a second support plate, an isolation motor and a grounding motor, a vertically arranged isolation operating mechanism, a grounding operating mechanism and an indication shaft are provided between the first support plate and the second support plate, the isolation operating mechanism and the grounding operating mechanism are symmetrically arranged with the indication shaft as the center, the isolation operating mechanism includes an isolation operating shaft, an isolation limit plate is fixed on the isolation operating shaft, an isolation toggle plate that is rotatably provided on the isolation operating shaft and is engaged with the isolation limit plate, the grounding operating mechanism includes a grounding operating shaft, a A grounding limit plate, a grounding toggle plate that is rotatably provided on the grounding operating shaft and is engaged with the grounding limit plate, an energy storage mechanism is provided between the isolation limit plate and the grounding limit plate, the indication shaft is hinged to the isolation toggle plate and the grounding limit plate respectively through a steering mechanism, a cam is provided at the upper end of the indication shaft, the lower end of the indication shaft extends from the first support plate and engages with the isolation main shaft laterally arranged on the lower side of the first support plate, the isolation motor rotates the isolation operating shaft through the first transmission member, the grounding motor rotates the grounding operating shaft through the second transmission member, a third support plate is also provided above the second support plate, and a micro switch matching the cam is installed on the third support plate.

Furthermore, the utility model provides a dual-motor three-position switch operating mechanism, wherein the energy storage mechanism includes a first rotating shaft, a second rotating shaft, a center pin and a compression spring, the isolation limit plate and the grounding limit plate are both fan-shaped, a first mounting hole is provided in the center of the isolation limit plate, the isolation limit plate is fixed to the isolation operating shaft through the first mounting hole, a second mounting hole is provided in the center of the grounding limit plate, the grounding limit plate is fixed to the grounding operating shaft through the second mounting hole, the first rotating shaft is rotatably installed at the junction of the two straight edges of the grounding limit plate, and the second rotating shaft is rotatably installed at the junction of the two straight edges of the isolation limit plate, the first end of the center pin is fixed to the middle part of the first rotating shaft, the second end of the center pin is inserted into the sliding through hole of the second rotating shaft, the compression spring is sleeved on the center pin, one end of the compression spring is abutted against the isolation operating shaft, and the second end of the compression spring is abutted against the grounding operating shaft.

Furthermore, the utility model provides a dual-motor three-position switch operating mechanism, wherein a first stop pin is fixed in the middle of the arc-shaped edge of the isolation limit plate, a first arc-shaped groove is provided on the outer side of the isolation toggle plate, the first stop pin extends downward and moves in the path defined by the first arc-shaped groove, a second stop pin is fixed in the middle of the arc-shaped edge of the grounding limit plate, a second arc-shaped groove is provided on the outer side of the grounding toggle plate, the second stop pin extends downward and moves in the path defined by the second arc-shaped groove.

Furthermore, the utility model provides a dual-motor three-position switch operating mechanism, wherein the steering mechanism includes a crank arm, a first steering rod and a second steering rod, the first end of the crank arm is fixedly connected to the indicator shaft, the first ends of the first steering rod and the second steering rod are both hinged to the second end of the crank arm, the second end of the first steering rod is hinged to the front half of the isolation toggle plate, and the second end of the second steering rod is hinged to the front half of the grounding toggle plate.

Furthermore, the utility model provides a dual-motor three-position switch operating mechanism, wherein the shape of the crank arm is a cam shape, the large end of the crank arm faces rearward and the small end faces forward, the large end of the crank arm is fixedly connected to the indicator shaft, and the small end of the crank arm is the common hinged end of the first steering rod and the second steering rod, and the first steering rod and the second steering rod are both arc-shaped rods protruding outward.

Furthermore, the utility model provides a dual-motor three-position switch operating mechanism, wherein the upper side of the first support plate is also provided with an isolation limit column and a grounding limit column, the isolation limit column is located on the right side of the isolation operating axis, a third arc groove is provided on the arc edge of the isolation limit plate, the isolation limit column is located within the moving path defined by the third arc groove, the grounding limit column is located on the left side of the grounding operating axis, a fourth arc groove is provided on the arc edge of the grounding limit plate, and the grounding limit column is located within the moving path defined by the fourth arc groove.

Furthermore, the utility model provides a dual-motor three-position switch operating mechanism, wherein a first bevel gear is fixed to the lower end of the indication shaft, the first bevel gear is coaxially arranged with the indication shaft, a second bevel gear is fixed on the main shaft, the second bevel gear is coaxially arranged with the main shaft, and the first bevel gear and the second bevel gear are meshed with each other.

Furthermore, the utility model provides a dual-motor three-position switch operating mechanism, wherein an isolated manual operating hexagonal shaft is sleeved and fixed on the upper end of the isolated operating shaft.

Furthermore, the utility model provides a dual-motor three-position switch operating mechanism, wherein a grounded manual operating hexagonal shaft is sleeved and fixed on the upper end of the grounded operating shaft.

Furthermore, the utility model provides a dual-motor three-position switch operating mechanism, wherein an indicator sign is fixed to the upper end of the indicator shaft, and the indicator sign is provided with a baffle extending backward, and when the isolation mechanism is in the closed position, the baffle shields the grounding operating shaft, and when the isolation mechanism is in the grounding position, the baffle shields the isolation operating shaft, and when the isolation mechanism is in the open position, the baffle is located between the isolation operating shaft and the grounding operating shaft.

The beneficial effects of the utility model are as follows: the isolation operating mechanism and the grounding operating mechanism are symmetrically arranged with the indicating shaft as the center, so that the structural load-bearing is more uniform, and the balance and stability of the operation process are ensured. Closing and opening can be achieved by rotating the isolation operating shaft by the isolation motor, and grounding closing and opening can be achieved by rotating the grounding shaft by the grounding motor, which improves the automation level of the mechanism and improves the convenience of use of the mechanism. The steering mechanism can realize the synchronous rotation of the indicating shaft and the isolation operating shaft or the grounding operating shaft, and the indicating shaft directly establishes a transmission relationship with the main shaft, thereby omitting other transmission components, improving the transmission efficiency of the system and making the structure compact, which is more conducive to miniaturization. And through the energy storage mechanism arranged between the isolation limit plate and the grounding limit plate, it can provide assistance to achieve rapid in-position retention during the closing, opening or grounding process of the mechanism, and has high safety performance. The in-position signal can be fed back by the micro switch to prevent excessive movement of the isolation motor or the grounding motor, thereby improving the safety of electrical operation.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the three-dimensional structure of a dual-motor three-position switch operating mechanism of the utility model;

FIG2 is a schematic diagram of the three-dimensional structure of a dual-motor three-position switch operating mechanism of the utility model with the indicator plate hidden;

3 is a schematic structural diagram of the state of the isolation operating mechanism, the grounding operating mechanism and the indicating shaft when the operating mechanism of a dual-motor three-position switch of the utility model is in the open position;

4 is a three-dimensional structural schematic diagram of the state of the isolation operating mechanism, the grounding operating mechanism and the indicating shaft when the operating mechanism of a dual-motor three-position switch of the utility model is in the open position;

5 is a schematic structural diagram of the state of the isolation operating mechanism, the grounding operating mechanism and the indicating shaft when the operating mechanism of a dual-motor three-position switch of the utility model is in the closed position;

6 is a three-dimensional structural schematic diagram of the state of the isolation operating mechanism, the grounding operating mechanism and the indicating shaft when the operating mechanism of a dual-motor three-position switch of the utility model is in the closed position;

7 is a schematic structural diagram of the state of the isolation operating mechanism, the grounding operating mechanism and the indicating shaft when the operating mechanism of a dual-motor three-position switch of the utility model is in the grounding position;

8 is a three-dimensional structural schematic diagram of the states of the isolation operating mechanism, the grounding operating mechanism and the indicating shaft when the operating mechanism of a dual-motor three-position switch of the utility model is in the grounding position.

DETAILED DESCRIPTION

The following is a detailed explanation and description of a dual-motor three-position switch operating mechanism of the utility model in conjunction with the drawings in the specification.

As shown in FIG. 1 and in combination with FIG. 2 , the embodiment of the utility model discloses a dual-motor three-position switch operating mechanism, including a first support plate 1, a second support plate 13, an isolation motor 3 and a grounding motor 2. A vertically arranged isolation operating mechanism, a grounding operating mechanism and an indication shaft 4 are provided between the first support plate 1 and the second support plate 13, and the main shaft 9 is horizontally arranged on the lower side of the first support plate 1. Among them, the isolation operating mechanism and the grounding operating mechanism are symmetrically arranged with the indication shaft 4 as the center. As shown in FIG. 1 , the isolation operating mechanism is arranged on the right side of the indication shaft 4, and the grounding operating shaft 6 is arranged on the left side of the indication shaft 4, and the isolation operating mechanism and the grounding operating mechanism are arranged symmetrically with the indication shaft 4 as the center. More specifically, the isolation operating mechanism includes an isolation operating shaft 5, on which an isolation limit plate 51 is fixed, and on the isolation operating shaft 5, an isolation toggle plate 52 that is rotatably provided and engages with the isolation limit plate 51 is also provided. The grounding operation mechanism includes a grounding operation shaft 6, on which a grounding limit plate 61 is fixed, and on which a grounding toggle plate 62 is rotatably provided to engage with the grounding limit plate 61. An energy storage mechanism 7 is provided between the isolation limit plate 51 and the grounding limit plate 61, and the indication shaft 4 is respectively hinged with the isolation toggle plate 52 and the grounding limit plate 61 through a steering mechanism 8. A cam 43 is provided at the upper end of the indication shaft 4, and the lower end of the indication shaft 4 extends from the first support plate 1 and meshes with the isolation main shaft 9 arranged laterally on the lower side of the first support plate 1. The isolation motor 3 rotates the isolation operation shaft 5 through the first transmission member 31, and the grounding motor 2 rotates the grounding operation shaft 6 through the second transmission member 21. The first transmission member 31 and the second transmission member 21 can be transmission members such as couplings, belts, and chains. A third support plate 14 is also provided above the second support plate 13, and a micro switch 15 matching the cam 43 is installed on the third support plate 14. More specifically, the micro switches are arranged in three groups, each group corresponding to the closing position, the opening position and the grounding position respectively. The cam 43 rotates with the indicating shaft 4. When the cam 43 contacts the micro switch 15 of a certain group, the corresponding micro switch 15 sends an electrical signal to indicate the state of the mechanism, and then receives the feedback signal of the micro switch 15 to automatically control the start and stop of the isolation motor 3 or the grounding motor 2.

The state shown in Figure 1 is the state when the structure is in the open position (Figures 3 and 4 are also the open position). In actual use, when the closing operation is required, the isolation motor 3 provides power for the rotation of the isolation operating shaft 5, and the isolation operating shaft 5 drives the isolation limit plate 51 to rotate. Under the blocking action of the isolation limit plate 51 and the isolation toggle plate 52, the isolation limit plate 51 pushes the isolation toggle plate 52 to rotate, and the energy storage mechanism 7 stores energy. When the energy storage mechanism 7 is at the energy storage inflection point, the isolation limit plate 51 continues to rotate under the joint action of the isolation motor 3 and the energy storage mechanism 7. In this process, the isolation toggle plate 52 drives the indication shaft 4 to rotate synchronously with the isolation operating shaft 5 through the steering mechanism 8, and the main shaft 9 is driven to rotate by the indication shaft 4 under the meshing action. After the closing is in place, the isolation motor 3 stops outputting, and the energy storage mechanism 7 completes the energy release, so that the mechanism remains in the closed position (i.e., the state shown in Figures 5 and 6). The operation process of opening and grounding is similar to the closing operation. When the grounding is in position, the state shown in Figures 6 and 7 is presented. The specific operation process is not repeated here. It can be seen from the above process that in this embodiment, the isolation operating mechanism and the grounding operating mechanism are symmetrically arranged with the indicating shaft 4 as the center, so that the structural load-bearing is more uniform and the balance and stability of the operation process are guaranteed. Closing and opening can be achieved by rotating the isolation operating shaft 5 by the isolation motor 3, and the grounding closing and opening can be achieved by rotating the grounding shaft by the grounding motor 2, which improves the automation level of the mechanism and improves the convenience of use of the mechanism. The steering mechanism 8 can realize the synchronous rotation of the indicating shaft 4 and the isolation operating shaft 5 or the grounding operating shaft 6, and the indicating shaft 4 directly constructs a transmission relationship with the main shaft 9, thereby omitting other transmission components, improving the transmission efficiency of the system and making the structure compact, which is more conducive to miniaturization. And the energy storage mechanism 7 set between the isolation limit plate 51 and the grounding limit plate 61 can provide assistance to achieve rapid position retention during the closing, opening or grounding of the mechanism, and the safety performance is high. It should be noted that the switching from the open position to the closed position and from the closed position to the open position is completed by the isolation operating shaft 5, and the switching from the open position to the grounded position and from the grounded position to the open position is completed by the grounding operating shaft 6.

In one embodiment of the utility model, as shown in FIG1 and in combination with FIG3, the energy storage mechanism 7 includes a first rotating shaft 71, a second rotating shaft 72, a center pin 73 and a compression spring 74. The isolation limit plate 51 and the grounding limit plate 61 are both fan-shaped, a first mounting hole is provided in the center of the isolation limit plate 51, and the isolation limit plate 51 is fixed on the isolation operation shaft 5 through the first mounting hole, and a second mounting hole is provided in the center of the grounding limit plate 61, and the grounding limit plate 61 is fixed on the grounding operation shaft 6 through the second mounting hole. The first rotating shaft 71 is rotatably mounted at the intersection of the two straight sides of the grounding limit plate 61, and the second rotating shaft 72 is rotatably mounted at the intersection of the two straight sides of the isolation limit plate 51. The first end of the center pin 73 is fixed to the middle of the first rotating shaft 71, and the second end of the center pin 73 is inserted into the sliding through hole 721 of the second rotating shaft 72. The compression spring 74 is sleeved on the center pin 73, and one end of the compression spring 74 abuts against the isolation operation shaft 5, and the second end of the compression spring 74 abuts against the grounding operation shaft 6. In order to prevent the second end of the center pin 73 from escaping from the sliding through hole 721 of the second rotating shaft 72, a pin sleeve can be set in the middle of the second rotating shaft 72, so that the second end of the center pin 73 can be inserted into the sliding through hole 721 through the pin sleeve. The pin sleeve can extend the moving stroke of the center pin 73 so that the second end of the center pin 73 is always in the pin sleeve and the sliding through hole 721.

In this embodiment, both ends of the compression spring 74 can rotate with the axis of the first rotating shaft 71 or the second rotating shaft 72, and the center pin 73 can pass through the sliding through hole 721 when the compression spring 74 is compressed, and the compression spring 74 completes an energy storage and energy release process every time it moves. For example, when the state shown in Figure 3 is converted to the state shown in Figure 5, the left end of the compression spring 74 rotates with the first rotating shaft 71 as the axis, and the right end of the compression spring 74 moves in a parabola. When the compression spring 74 moves to the highest point of the parabola, the compression spring 74 stores the most energy, and this position is also the critical point of the compression spring 74. When the movement continues, the compression spring 74 begins to release energy and generates a certain thrust, which is consistent with the rotation direction of the isolation limit plate 51, thereby completing the state conversion. Similarly, when the state shown in Figure 5 is converted to the state shown in Figure 3, the state shown in Figure 3 is converted to the state shown in Figure 7, or the state shown in Figure 7 is converted to the state shown in Figure 3, the compression spring 74 completes a complete energy storage and energy release. Compared with the conventional arrangement of two compression springs 74 each responsible for the corresponding operation shaft action, this embodiment saves components, reduces costs, and makes the overall structure of the mechanism more compact.

In one embodiment of the utility model, as shown in FIG. 1 in combination with FIG. 4 , FIG. 6 and FIG. 8 , a first stop pin 53 is fixed in the middle of the arcuate edge of the isolation limit plate 51, a first arcuate groove 511 is provided on the outer side of the isolation toggle plate 52 (e.g., the right side of the isolation toggle plate 52 shown in FIG. 4 ), and the first stop pin 53 extends downward and moves in the path defined by the first arcuate groove 511. Similarly, a second stop pin 63 is fixed in the middle of the arcuate edge of the grounding limit plate 61, a second arcuate groove 611 is provided on the outer side of the grounding toggle plate 62 (e.g., the left side of the grounding toggle plate 62 shown in FIG. 6 ), and the second stop pin 63 extends downward and moves in the path defined by the second arcuate groove 611. An isolation limit column 11 and a grounding limit column 12 are also provided on the upper side of the first support plate 1. The isolation limit column 11 is located on the right side of the isolation operating shaft 5. A third arc groove 521 is provided on the arc edge of the isolation limit plate 51. The isolation limit column 11 is located in the moving path defined by the third arc groove 521. The grounding limit column 12 is located on the left side of the grounding operating shaft 6. A fourth arc groove 621 is provided on the arc edge of the grounding limit plate 61. The grounding limit column 12 is located in the moving path defined by the fourth arc groove 621.

As shown in FIG1 , the steering mechanism 8 includes a crank arm 81, a first steering rod 82, and a second steering rod 83. The first end of the crank arm 81 is fixedly connected to the indicating shaft 4, the first ends of the first steering rod 82 and the second steering rod 83 are both hinged to the second end of the crank arm 81, the second end of the first steering rod 82 is hinged to the front half of the isolation toggle plate 52, and the second end of the second steering rod 83 is hinged to the front half of the ground toggle plate 62. The shape of the crank arm 81 is set to be cam-shaped, the large end of the crank arm 81 faces backward and the small end faces forward, so that the crank arm 81 extends forward to form a certain rotation space, and the large end of the crank arm 81 is fixedly connected to the indicating shaft 4, the small end of the crank arm 81 is the common hinge end of the first steering rod 82 and the second steering rod 83, and the first steering rod 82 and the second steering rod 83 are both set to be arc rods protruding outwards, and the connecting arc rod can increase the action stroke under the premise of occupying a small amount of space compared to the straight rod.

In this embodiment, since the isolation toggle plate 52 is provided with a first arc groove 511, when the mechanism changes from the open position to the closed position or from the closed position to the open position, it is first necessary to complete the path defined by the first arc groove 511, so that the compression amount of the compression spring 74 reaches the maximum, and then the isolation limit plate 51 drives the isolation toggle plate 52 to rotate with this as the critical point, and then the compression spring 74 releases energy to complete the isolation opening and closing operation and maintain it in place. The grounding toggle plate 62 is provided with a second arc groove 611. When the mechanism changes from the open position to the connected position or from the connected position to the open position, it is first necessary to complete the path defined by the second arc groove 611, so that the compression amount of the compression spring 74 reaches the maximum, and then the grounding limit plate 61 drives the grounding toggle plate 62 to rotate with this as the critical point, and then the compression spring 74 releases energy to complete the grounding opening and closing operation and maintain it in place. This can ensure that the compression spring 74 does not perform other linkage operations when storing energy. Compared with the traditional compression spring 74 that needs to drive other linkage components to move at the same time when storing energy, the output torque of the isolation motor 3 or the grounding motor 2 can be reduced.

In one embodiment of the utility model, as shown in FIG1 , a first bevel gear 41 is fixed to the lower end of the indicating shaft 4, and the first bevel gear 41 is coaxially arranged with the indicating shaft 4. A second bevel gear 91 is fixed to the main shaft 9, and the second bevel gear 91 is coaxially arranged with the main shaft 9, and the first bevel gear 41 and the second bevel gear 91 are meshed with each other. This meshing design enables efficient and smooth transmission of power during operation. The mutual meshing between the two bevel gears not only improves the transmission accuracy, but also effectively reduces noise and vibration, and prolongs the service life. In addition, this design also enables stable operating performance to be maintained when subjected to a large load.

In one embodiment of the utility model, the upper end of the isolation operation shaft 5 is sleeved with an isolation manual operation hexagonal shaft 54, so that when the isolation motor 3 is not available, the manual isolation opening and closing operation can be performed. The upper end of the grounding operation shaft 6 is sleeved with a grounding manual operation hexagonal shaft 64, so that when the grounding motor 2 is not available, the manual grounding opening and closing operation can be performed. In order to further improve the safety of the mechanism operation and prevent misoperation, an indicator board 42 is fixed on the upper end of the indicator shaft 4, and a shielding plate 421 extending backward is provided on the indicator board 42. When the isolation mechanism is in the closing position, the shielding plate 421 shields the grounding operation shaft 6, when the isolation mechanism is in the contacting position, the shielding plate 421 shields the isolation operation shaft 5, and when the isolation mechanism is in the opening position, the shielding plate 421 is between the isolation operation shaft 5 and the grounding operation shaft 6. In this way, when the isolation opening and closing operation is performed, the grounding operation cannot be performed; when the grounding opening and closing operation is performed, the isolation operation cannot be performed, thereby improving the safety of operation, which is mainly aimed at manual operation.

The basic operating principle of the utility model is as follows:

In the open state, as shown in Figure 4, the small end of the crank arm 81 faces straight ahead, the first stop pin 53 on the isolation limit plate 51 abuts against the left groove wall of the first arc groove 511 of the isolation toggle plate 52, the right groove wall of the third arc groove 521 of the isolation limit plate 51 abuts against the isolation limit column 11, the compression spring 74 is in a natural state, the second stop pin 63 on the grounding limit plate 61 abuts against the right groove wall of the second arc groove 611 of the grounding toggle plate 62, and the left groove wall of the fourth arc groove 621 of the grounding limit plate 61 abuts against the grounding limit column 12.

When closing the circuit breaker, that is, changing from the state shown in FIG4 to the state shown in FIG6, the isolation motor 3 drives the isolation operating shaft 5 to rotate counterclockwise. At this time, the compression spring 74 is compressed. When the compression amount of the compression spring 74 reaches the maximum, the first stop pin 53 on the isolation limit plate 51 just abuts against the right groove wall of the first arc groove 511 of the isolation toggle plate 52 (the first stop pin 53 completes the path defined by the first arc groove 511). When the isolation operating shaft 5 continues to rotate, the isolation motor 3 may not work at this time, and the compression spring 74 releases energy instantly, driving the isolation limit plate 51 to continue to rotate counterclockwise. At this time, the isolation toggle plate 52 is under the action of the first stop pin 53. It rotates counterclockwise, and the isolation toggle plate 52 pulls the crank arm 81 to rotate counterclockwise under the action of the first steering rod 82, and the grounding toggle plate 62 follows the action of the second steering rail (while the grounding operating shaft 6 does not rotate). At the same time, the indicating shaft 4 rotates counterclockwise following the crank arm 81, and the main shaft 9 drives the knife switch to move upward under the action of the engagement with the indicating shaft 4. When the compression spring 74 returns to its natural state, the baffle plate 421 at the upper end of the indicating shaft 4 blocks the grounding operating shaft 6, and the left groove wall of the third arc groove 521 on the isolation limit plate 51 is against the isolation limit shaft. Under the action of the compression spring 74, the mechanism remains in the closed position to complete the closing operation.

When the opening operation is performed in the closing position, the isolation motor 3 drives the isolation operating shaft 5 to rotate clockwise. At this time, the compression spring 74 is compressed. When the compression amount of the compression spring 74 reaches the maximum, the first stop pin 53 on the isolation limit plate 51 is just against the left groove wall of the first arc groove 511 of the isolation toggle plate 52 (the first stop pin 53 completes the path defined by the first arc groove 511). When the isolation operating shaft 5 continues to rotate, the isolation motor 3 may not work at this time, and the compression spring 74 releases energy instantly, driving the isolation limit plate 51 to continue to rotate clockwise. At this time, the isolation toggle plate 52 rotates clockwise under the action of the first stop pin 53, and the isolation toggle plate 52 is Under the action of the first steering rod 82, the crank arm 81 is pulled to rotate clockwise, and the grounding toggle plate 62 moves under the action of the second steering rail (while the grounding operating shaft 6 does not rotate). At the same time, the indicating shaft 4 rotates clockwise following the crank arm 81, and the main shaft 9 drives the knife switch to move downward under the action of the engagement with the indicating shaft 4. When the compression spring 74 returns to its natural state, the baffle plate 421 at the upper end of the indicating shaft 4 neither blocks the isolation operating shaft 5 nor the grounding operating shaft 6, and the right groove wall of the third arc groove 521 on the isolation limit plate 51 is against the isolation limit shaft. Under the action of the compression spring 74, the mechanism remains in the open position, completing the operation from the closed position to the open position.

When the grounding switch is closed, that is, the state shown in Figure 4 is changed to the state shown in Figure 8, the grounding motor 2 drives the grounding operating shaft 6 to rotate clockwise. At this time, the compression spring 74 is compressed. When the compression amount of the compression spring 74 reaches the maximum, the second stop pin 63 on the grounding limit plate 61 is just against the left groove wall of the second arc groove 611 of the grounding toggle plate 62 (the second stop pin 63 completes the path defined by the second arc groove 611). When the grounding operating shaft 6 continues to rotate, the grounding motor 2 can stop working at this time, and the compression spring 74 releases energy instantly, driving the grounding limit plate 61 to continue to rotate clockwise. At this time, the grounding toggle plate 62 is under the action of the first stop pin 53. The grounding toggle plate 62 pulls the crank arm 81 to rotate clockwise under the action of the second steering rod 83, and the isolation toggle plate 52 moves under the action of the first steering rail (while the isolation operating shaft 5 does not rotate). At the same time, the indicating shaft 4 rotates clockwise following the crank arm 81, and the main shaft 9 drives the knife switch to move downward under the action of the engagement with the indicating shaft 4. When the compression spring 74 returns to its natural state, the baffle plate 421 at the upper end of the indicating shaft 4 blocks the isolation operating shaft 5, and the right groove wall of the fourth arc groove 621 on the grounding limit plate 61 is against the grounding limit shaft. Under the action of the compression spring 74, the mechanism remains in the grounding position to complete the grounding operation.

When the opening operation is performed in the grounding position, the grounding motor 2 drives the grounding operating shaft 6 to rotate counterclockwise. At this time, the compression spring 74 is compressed. When the compression amount of the compression spring 74 reaches the maximum, the second stop pin 63 on the grounding limit plate 61 just abuts against the right groove wall of the second arc groove 611 of the grounding toggle plate 62 (the second stop pin 63 completes the path defined by the second arc groove 611). When the grounding operating shaft 6 continues to rotate, the grounding motor 2 can stop working at this time, and the compression spring 74 releases energy instantly, driving the grounding limit plate 61 to continue to rotate counterclockwise. At this time, the grounding toggle plate 62 rotates counterclockwise under the action of the first stop pin 53, and the grounding toggle plate 62 is Under the action of the second steering rod 83, the crank arm 81 is pulled to rotate counterclockwise, and the isolation toggle plate 52 moves under the action of the first steering railing (while the isolation operating shaft 5 does not rotate). At the same time, the indicating shaft 4 rotates counterclockwise following the crank arm 81, and the main shaft 9 drives the knife switch to move upward under the action of the engagement with the indicating shaft 4. When the compression spring 74 returns to its natural state, the baffle plate 421 at the upper end of the indicating shaft 4 neither blocks the isolation operating shaft 5 nor the grounding operating shaft 6, and the left groove wall of the fourth arc groove 621 on the grounding limit plate 61 is against the grounding limit shaft. Under the action of the compression spring 74, the mechanism is maintained in the open position, completing the operation from the connected position to the open position.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and simple improvements made to the essential contents of the present invention shall be included in the protection scope of the present invention.

Claims (10)

1. A dual-motor three-position switch operating mechanism, characterized in that it includes a first support plate, a second support plate, an isolation motor and a grounding motor, a vertically arranged isolation operating mechanism, a grounding operating mechanism and an indication shaft are arranged between the first support plate and the second support plate, the isolation operating mechanism and the grounding operating mechanism are symmetrically arranged with the indication shaft as the center, the isolation operating mechanism includes an isolation operating shaft, an isolation limit plate is fixed on the isolation operating shaft, an isolation toggle plate that is rotatably provided on the isolation operating shaft and is blocked and connected with the isolation limit plate, the grounding operating mechanism includes a grounding operating shaft, a grounding limit plate is fixed on the grounding operating shaft, A grounding toggle plate that is rotatably provided on the ground operating shaft and is engaged with the grounding limit plate, an energy storage mechanism is provided between the isolation limit plate and the grounding limit plate, the indication shaft is hinged to the isolation toggle plate and the grounding limit plate respectively through a steering mechanism, a cam is provided at the upper end of the indication shaft, the lower end of the indication shaft extends from the first support plate and engages with the isolation main shaft laterally arranged on the lower side of the first support plate, the isolation motor rotates the isolation operating shaft through the first transmission member, the grounding motor rotates the grounding operating shaft through the second transmission member, a third support plate is also provided above the second support plate, and a micro switch matching the cam is installed on the third support plate. 2. A dual-motor three-position switch operating mechanism according to claim 1, characterized in that: the energy storage mechanism includes a first rotating shaft, a second rotating shaft, a center pin and a compression spring, the isolation limit plate and the grounding limit plate are both fan-shaped, a first mounting hole is provided in the center of the isolation limit plate, the isolation limit plate is fixed to the isolation operating shaft through the first mounting hole, a second mounting hole is provided in the center of the grounding limit plate, the grounding limit plate is fixed to the grounding operating shaft through the second mounting hole, the first rotating shaft is rotatably installed at the junction of the two straight edges of the grounding limit plate, and the second rotating shaft is rotatably installed at the junction of the two straight edges of the isolation limit plate, the first end of the center pin is fixed to the middle part of the first rotating shaft, the second end of the center pin is inserted into the sliding through hole of the second rotating shaft, the compression spring is sleeved on the center pin, one end of the compression spring is against the isolation operating shaft, and the second end of the compression spring is against the grounding operating shaft. 3. A dual-motor three-position switch operating mechanism according to claim 2 is characterized in that: a first stop pin is fixed in the middle of the arc-shaped edge of the isolation limit plate, a first arc-shaped groove is provided on the outer side of the isolation toggle plate, the first stop pin extends downward and moves in the path defined by the first arc-shaped groove, a second stop pin is fixed in the middle of the arc-shaped edge of the grounding limit plate, a second arc-shaped groove is provided on the outer side of the grounding toggle plate, the second stop pin extends downward and moves in the path defined by the second arc-shaped groove. 4. A dual-motor three-position switch operating mechanism according to claim 2, characterized in that: the steering mechanism includes a crank arm, a first steering rod and a second steering rod, the first end of the crank arm is fixedly connected to the indicator shaft, the first ends of the first steering rod and the second steering rod are both hinged to the second end of the crank arm, the second end of the first steering rod is hinged to the front half of the isolation toggle plate, and the second end of the second steering rod is hinged to the front half of the grounding toggle plate. 5. A dual-motor three-position switch operating mechanism according to claim 4, characterized in that: the shape of the crank arm is a cam shape, the big end of the crank arm faces rearward and the small end faces forward, the big end of the crank arm is fixedly connected to the indicator shaft, the small end of the crank arm is the common hinge end of the first steering rod and the second steering rod, and the first steering rod and the second steering rod are both arc-shaped rods protruding outward. 6. A dual-motor three-position switch operating mechanism according to claim 2, characterized in that: an isolation limit column and a grounding limit column are also provided on the upper side of the first support plate, the isolation limit column is located on the right side of the isolation operating axis, a third arc groove is provided on the arc edge of the isolation limit plate, the isolation limit column is located in the moving path defined by the third arc groove, the grounding limit column is located on the left side of the grounding operating axis, a fourth arc groove is provided on the arc edge of the grounding limit plate, and the grounding limit column is located in the moving path defined by the fourth arc groove. 7. A dual-motor three-position switch operating mechanism according to claim 1, characterized in that: a first bevel gear is fixed to the lower end of the indication shaft, the first bevel gear is coaxially arranged with the indication shaft, a second bevel gear is fixed on the main shaft, the second bevel gear is coaxially arranged with the main shaft, and the first bevel gear and the second bevel gear are meshed with each other. 8. A dual-motor three-position switch operating mechanism according to claim 1, characterized in that an isolated manual operating hexagonal shaft is sleeved and fixed on the upper end of the isolated operating shaft. 9. A dual-motor three-position switch operating mechanism according to claim 1, characterized in that a grounded manual operating hexagonal shaft is sleeved and fixed on the upper end of the grounded operating shaft. 10. A dual-motor three-position switch operating mechanism according to claim 1, characterized in that: an indicator sign is fixed to the upper end of the indicator shaft, and the indicator sign is provided with a baffle extending backward, when the isolation mechanism is in the closed position, the baffle plate blocks the grounding operating shaft, when the isolation mechanism is in the grounding position, the baffle plate blocks the isolation operating shaft, and when the isolation mechanism is in the open position, the baffle plate is between the isolation operating shaft and the grounding operating shaft.