A three-position isolating grounding switch

Abstract

The utility model discloses a three-station isolation grounding switch, which belongs to the field of high-voltage switches, including a box, a motor, a screw, a nut, an output shaft, a control component and a signal output component, wherein the screw is connected to the motor in a transmission manner, the nut is threadedly connected to the screw, the nut is slidably connected to the box, the motor is used to drive the screw to rotate to drive the nut to move, the output shaft is connected to the nut in a transmission manner, the nut is used to drive the output shaft to rotate when moving, the control component includes a first control micro switch and a second control micro switch, the first control micro switch and the second control micro switch are used to control the motor to stop working after being squeezed by the nut, and the signal output component is connected to the nut in a transmission manner, and is used to output a corresponding station signal when the nut drives the output shaft to rotate. The utility model can accurately reflect the position of the three-station isolation grounding switch, and meet the one-key sequential control requirements of the State Grid, and can improve the service life of the equipment.

Description

Technical Field

[0001] The utility model relates to the technical field of high-voltage switches, in particular to a three-position isolating grounding switch. Background Art

[0002] The three-position switch is an electrical device used for connection, isolation and grounding. The patent application number 202311463018.0 discloses a three-position mechanism that always reflects the state of the main body, including a motor, a screw, a drive nut, a drive plate, a drive wheel, a driving shaft, a driving main gear, a driving driven gear, an output shaft, and a confirmation mechanism installed in the housing; the confirmation mechanism includes a driving gear, a driven gear, a cam plate, a sleeve, and a micro switch; the driving gear is fixedly sleeved on the output shaft, the driven gear meshes with the driving gear, the driven gear is sleeved on the driving shaft through the sleeve gap, the driven gear is connected to the cam plate, the cam plate gap is sleeved on the sleeve, and the micro switch is installed on one side of the cam plate, and the micro switch can contact the cam plate. The start and stop of the motor of this three-position mechanism is not easy to control. When the driving nut moves to the end of the stroke, the motor continues to rotate, which can easily cause the motor to get stuck. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a three-position isolating grounding switch, which solves the problem that the start and stop of the existing three-position mechanism is difficult to control, and the driving nut moves to the end of the stroke, and the motor continues to rotate, which easily leads to the motor being stuck.

[0004] A three-position isolating grounding switch according to an embodiment of the utility model includes:

[0005] Box;

[0006] A motor, mounted on the box;

[0007] A screw rod is rotatably connected to the box body, and the screw rod is drivingly connected to the motor;

[0008] A nut is threadedly connected to the screw rod, the nut is slidably connected to the box body, and the motor is used to drive the screw rod to rotate so as to drive the nut to move along the axial direction of the screw rod;

[0009] An output shaft, rotatably connected to the box body, the output shaft is drivingly connected to the nut, and the nut is used to drive the output shaft to rotate when moving;

[0010] A control component, electrically connected to the motor, the control component comprising a first control micro switch and a second control micro switch, the first control micro switch and the second control micro switch are located at two ends of the moving track of the nut, and the first control micro switch and the second control micro switch are used to control the motor to stop working after being squeezed by the nut;

[0011] A signal output component is installed on the box body, the signal output component is drivingly connected to the nut, and the signal output component is used to output a corresponding work position signal when the nut drives the output shaft to rotate.

[0012] A three-position isolating grounding switch according to an embodiment of the utility model has at least the following beneficial effects:

[0013] The motor drives the screw to rotate, and the screw drives the nut to move along the axial direction of the screw. The nut is connected to the output shaft and the model output component, so that when the nut drives the output shaft to rotate, the signal output component can synchronously output the corresponding position signal, which can accurately reflect the position of the three-position isolation grounding switch and meet the one-key sequential control requirements of the State Grid. After the first control micro switch and the second control micro switch are squeezed by the nut, the motor can be controlled to stop working, so that the nut moves to the end of the stroke, and the motor will not continue to rotate, reducing the risk of motor jamming and increasing the service life of the equipment.

[0014] According to some embodiments of the utility model, a toggle protrusion is protruding on the nut, a drive plate is provided on the box body, the drive plate is rotatably connected to the box body, a toggle groove for the toggle protrusion to extend into is provided on the drive plate, the toggle protrusion is used to push the inner wall of the toggle groove to drive the drive plate to rotate, the output shaft is transmission connected to the drive plate, and the signal output assembly is transmission connected to the drive plate.

[0015] According to some embodiments of the utility model, the signal output component includes a cam plate and a micro switch component, the cam plate is rotatably connected to the box body, the cam plate is transmission connected to the drive plate, a convex portion and a concave portion are arranged on the cam plate, the distance from the convex portion to the rotation center of the cam plate is greater than the distance from the concave portion to the rotation center of the cam plate, and the cam plate is used to rotate to different positions so that the convex portion or the concave portion abuts against the micro switch component to control the output of a corresponding work position signal.

[0016] According to some embodiments of the utility model, the micro switch assembly includes an isolation opening micro switch, an isolation closing micro switch, an earthing closing micro switch and an earthing opening micro switch arranged around the cam plate;

[0017] When the cam plate rotates to the opening position, the isolation opening micro switch and the grounding opening micro switch abut against the recessed portion, and output isolation opening and grounding opening signals;

[0018] When the cam plate rotates to the isolation closing position, the isolation closing micro switch abuts against the recess and outputs an isolation closing signal;

[0019] When the cam plate rotates to the grounding closing position, the grounding closing micro switch abuts against the recess and outputs a grounding closing signal.

[0020] According to some embodiments of the utility model, there are two motors, two screw rods and two nuts, and there are two toggle protrusions. The two motors are respectively a first motor and a second motor, the two screw rods are respectively a first screw rod and a second screw rod, and the two nuts are respectively a first nut and a second nut. There are two toggle grooves on the drive plate, and the first motor is used to drive the first nut to move through the first screw rod, and the second motor is used to drive the second nut to move through the second screw rod. The movement trajectory of the first nut and the movement trajectory of the second nut are located on both sides of the rotation center of the drive plate.

[0021] According to some embodiments of the present invention, when the first nut is located at the first end of the first screw and the second nut is located at the first end of the second screw, the toggle protrusion on the first nut is staggered with the toggle groove and is located outside the moving track of the drive plate, the toggle protrusion on the second nut is staggered with the toggle groove and is located outside the moving track of the drive plate, and the cam plate is located at the opening position;

[0022] When the first nut is located at the first end of the first screw rod and the second nut is located at the second end of the second screw rod, the toggle protrusion on the first nut is staggered from the toggle groove and is located outside the moving track of the driving plate, the toggle protrusion on the second nut extends into the corresponding toggle groove, and the cam plate is located at the isolation closing position;

[0023] When the second nut is located at the first end of the second screw rod and the first nut is located at the second end of the first screw rod, the toggle protrusion on the second nut is offset from the toggle groove and is located outside the moving trajectory of the driving plate, the toggle protrusion on the first nut extends into the corresponding toggle groove, and the cam plate is located in the grounding closing position.

[0024] According to some embodiments of the utility model, a transmission gear is provided on the housing, a gear portion is provided on the output shaft, the transmission gear is rotatably connected to the housing, the transmission gear is transmission-connected to the drive plate, and the transmission gear is meshed with the gear portion.

[0025] According to some embodiments of the utility model, a guide notch is provided on the driving plate, the toggle groove is located on the bottom wall of the guide notch, and the guide notch is used to guide the toggle protrusion to be inserted into the toggle groove.

[0026] According to some embodiments of the utility model, a mounting plate is provided on the box body, a slide groove is provided on the mounting plate, the length direction of the slide groove is the axial direction of the screw rod, a sliding protrusion is protruded on the nut, and the sliding protrusion is slidably connected in the slide groove.

[0027] According to some embodiments of the utility model, a contactor is further provided on the box body, the contactor is electrically connected to the motor, and the contactor is used to control the forward or reverse rotation of the motor.

[0028] Additional aspects and advantages of the present invention will be partially presented in the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0030] Figure 1 This is a schematic structural diagram of a three-position isolating grounding switch according to an embodiment of the utility model;

[0031] Figure 2 This is a schematic diagram of the structure of the three-station isolating grounding switch of the embodiment of the utility model after removing the signal output component;

[0032] Figure 3 It is a structural schematic diagram of a signal output component when the cam plate in the three-position isolating and grounding switch of an embodiment of the utility model is located in the opening position;

[0033] Figure 4 This is a structural schematic diagram of the signal output component when the cam plate of the three-position isolating grounding switch of the utility model is located in the isolating closing position

[0034] Figure 5 This is a structural schematic diagram of the signal output component when the cam plate of the three-position isolating grounding switch of the utility model is located in the grounding closing position

[0035] Figure 6 It is a structural schematic diagram of a driving board of a three-station isolating and grounding switch according to an embodiment of the utility model;

[0036] Figure 7 The present invention is a schematic structural diagram of a driving plate and a nut of a three-position isolating and grounding switch according to an embodiment of the present invention.

[0037] Figure Number:

[0038] 100, box body; 110, mounting plate; 111, slideway; 120, industrial connector; 130, auxiliary switch; 140, indicator;

[0039] 200, motor; 210, first motor; 220, second motor; 230, contactor;

[0040] 300, screw rod; 310, first screw rod; 320, second screw rod;

[0041] 400, nut; 410, toggle protrusion; 420, sliding protrusion; 430, first nut; 440, second nut;

[0042] 500, driving plate; 510, toggle slot; 511, guide notch;

[0043] 600, output shaft; 610, transmission gear

[0044] 700, control assembly; 710, first control micro switch; 720, second control micro switch;

[0045] 800, signal output assembly; 810, cam plate; 811, convex part; 812, concave part; 820, micro switch assembly; 821, earthing opening micro switch; 822, earthing closing micro switch; 823, isolation closing micro switch; 824, isolation opening micro switch. DETAILED DESCRIPTION

[0046] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0047] In the description of the present utility model, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0048] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] See also Figure 1 , Figure 2 and Figure 3 A three-station isolating grounding switch according to an embodiment of the utility model comprises a housing 100, a motor 200, a screw rod 300, a nut 400, an output shaft 600, a control assembly 700 and a signal output assembly 800. The motor 200 is mounted on the housing 100, the screw rod 300 is rotatably connected to the housing 100, and the screw rod 300 is transmission-connected to the motor 200. The nut 400 is threadedly connected to the screw rod 300, and the nut 400 is slidably connected to the housing 100. The motor 200 is used to drive the screw rod 300 to rotate so as to drive the nut 400 to move along the axial direction of the screw rod 300. The output shaft 600 is rotatably connected to the housing 100, and the output shaft 600 is transmission-connected to the nut 400, and the nut 400 is used to drive the output shaft 600 to rotate when moving. The control assembly 700 is electrically connected to the motor 200, and includes a first control micro switch 710 and a second control micro switch 720. The first control micro switch 710 and the second control micro switch 720 are located at both ends of the moving track of the nut 400. The first control micro switch 710 and the second control micro switch 720 are used to control the motor 200 to stop working after being squeezed by the nut 400. The signal output assembly 800 is installed on the box 100, and the signal output assembly 800 is transmission-connected to the nut 400. The signal output assembly 800 is used to output a corresponding position signal when the nut 400 drives the output shaft 600 to rotate.

[0050] The motor 200 drives the screw 300 to rotate, and the screw 300 drives the nut 400 to move along the axial direction of the screw 300. The nut 400 is connected to the output shaft 600 and the model output component, so that when the nut 400 drives the output shaft 600 to rotate, the signal output component 800 can synchronously output the corresponding work position signal, which can accurately reflect the position of the three-position isolation grounding switch and meet the one-key sequential control requirements of the State Grid. After the first control micro switch 710 and the second control micro switch 720 are squeezed by the nut 400, the motor 200 can be controlled to stop working, so that the nut 400 moves to the end of the stroke, and the motor 200 will not continue to rotate, reducing the risk of the motor 200 getting stuck and increasing the service life of the equipment.

[0051] In some embodiments, see Figure 2 , Figure 6 and Figure 7 , a toggle protrusion 410 is protruding from the nut 400, and a driving plate 500 is provided on the box 100, and the driving plate 500 is rotatably connected to the box 100. A toggle groove 510 for the toggle protrusion 410 to extend into is provided on the driving plate 500, and the toggle protrusion 410 is used to push the inner wall of the toggle groove 510 to drive the driving plate 500 to rotate, the output shaft 600 is transmission-connected with the driving plate 500, and the signal output component 800 is transmission-connected with the driving plate 500. The motor 200 drives the screw rod 300 to rotate, the screw rod 300 drives the nut 400 to move, the toggle protrusion 410 pushes the inner wall of the toggle groove 510, so that the driving plate 500 rotates, drives the output shaft 600 to rotate, realizes the output movement of the mechanism, and the signal output component 800 sends an isolation or grounding opening and closing position signal. It can accurately reflect the position of the three-position isolation grounding switch and meet the one-key sequential control requirements of the State Grid.

[0052] In some embodiments, see Figure 1 , Figure 2 and Figure 3 The signal output assembly 800 includes a cam plate 810 and a micro switch assembly 820. The cam plate 810 is rotatably connected to the housing 100. The cam plate 810 is in transmission connection with the driving plate 500. The driving plate 500 rotates to drive the cam plate 810. The cam plate 810 is provided with a convex portion 811 and a concave portion 812. The distance from the convex portion 811 to the rotation center of the cam plate 810 is greater than the distance from the concave portion 812 to the rotation center of the cam plate 810. The cam plate 810 is used to rotate to different positions so that the convex portion 811 or the concave portion 812 abuts against the micro switch assembly 820 to control the output of the corresponding work position signal. The driving plate 500 drives the cam plate 810 to rotate, and the micro switch assembly 820 is started when it abuts against the convex portion 811 on the cam plate 810, and is closed when it abuts against the concave portion 812 of the cam plate 810. The micro switch assembly 820 can send out different signals when contacting the concave portion 812 and the convex portion 811 to meet the requirements of sending three-position signals.

[0053] In some embodiments, see Figure 1 and Figure 2 The micro switch assembly 820 includes an isolation opening micro switch 824, an isolation closing micro switch 823, a grounding closing micro switch 822 and a grounding opening micro switch 821 arranged around the cam plate 810.

[0054] See also Figure 3When the cam plate 810 rotates to the opening position, the isolating opening micro switch 824 and the grounding opening micro switch abut against the recess 812, the isolating opening micro switch 824 and the grounding opening micro switch 821 are in a released state, and output isolation opening and grounding opening signals.

[0055] See also Figure 4 When the cam plate 810 rotates to the isolation closing position, the isolation closing micro switch 823 abuts against the recess 812, the isolation closing micro switch 823 is in a released state, and outputs an isolation closing signal.

[0056] See also Figure 5 When the cam plate 810 rotates to the grounding closing position, the grounding closing micro switch 822 abuts against the recess 812, the grounding closing micro switch 822 is in a released state, and outputs a grounding closing signal.

[0057] In some embodiments, see Figure 1 and Figure 2 , two motors 200, two screw rods 300 and two nuts 400 are provided, and there are two toggle protrusions 410, respectively. The two motors 200 are respectively the first motor 210 and the second motor 220, the two screw rods 300 are respectively the first screw rod 310 and the second screw rod 320, and the two nuts 400 are respectively the first nut 430 and the second nut 440. There are two toggle slots 510 on the driving plate 500, respectively. The first motor 210 is used to drive the first nut 430 to move through the first screw rod 310, and the second motor 220 is used to drive the second nut 440 to move through the second screw rod 320. The moving tracks of the first nut 430 and the moving tracks of the second nut 440 are located on both sides of the rotation center of the driving plate 500.

[0058] See also Figure 2 , with the left end as the first end and the right end as the second end, the first motor 210 drives the first nut 430 to move from the first end to the second end through the first screw rod 310, thereby driving the driving plate 500 to rotate clockwise. The first motor 210 drives the first nut 430 to move from the second end to the first end through the first screw rod 310, thereby driving the driving plate 500 to rotate counterclockwise.

[0059] The second motor 220 drives the second nut 440 from the first end to the second end through the second screw rod 320, thereby driving the driving plate 500 to rotate counterclockwise. The second motor 220 drives the second nut 440 from the second end to the first end through the second screw rod 320, thereby driving the driving plate 500 to rotate clockwise.

[0060] In some embodiments, see Figure 1 , Figure 2 and Figure 3When the first nut 430 is located at the first end of the first screw rod 310 and the second nut 440 is located at the first end of the second screw rod 320, the toggle protrusion 410 on the first nut 430 is staggered from the toggle groove 510 and is located outside the moving track of the driving plate 500 (when the second nut 440 drives the driving plate 500 to rotate, the driving plate 500 will not interfere with the toggle protrusion 410 on the first nut 430), the toggle protrusion 410 on the second nut 440 is staggered from the toggle groove 510 and is located outside the moving track of the driving plate 500 (when the first nut 430 drives the driving plate 500 to rotate, the driving plate 500 will not interfere with the toggle protrusion 410 on the second nut 440), and the cam plate 810 is located at the opening position. The isolation opening micro switch 824 and the grounding opening switch abut the recess 812, the isolation opening micro switch 824 and the grounding opening switch are in a loose state, and the isolation opening and grounding opening signals are output.

[0061] See also Figure 1 , Figure 2 and Figure 4 When the first nut 430 is located at the first end of the first screw rod 310 and the second nut 440 is located at the second end of the second screw rod 320, the toggle protrusion 410 on the first nut 430 is staggered with the toggle groove 510 and is located outside the moving track of the driving plate 500, the toggle protrusion 410 on the second nut 440 extends into the corresponding toggle groove 510, and the cam plate 810 is located at the isolation closing position. The isolation closing micro switch 823 abuts against the recess 812, the isolation closing micro switch 823 is in a released state, and an isolation closing signal is output.

[0062] See also Figure 1 , Figure 2 and Figure 5 When the second nut 440 is located at the first end of the second screw rod 320 and the first nut 430 is located at the second end of the first screw rod 310, the toggle protrusion 410 on the second nut 440 is staggered with the toggle groove 510 and is located outside the moving track of the driving plate 500, the toggle protrusion 410 on the first nut 430 extends into the corresponding toggle groove 510, and the cam plate 810 is located at the grounding closing position. The grounding closing micro switch 822 abuts against the recess 812, the grounding closing micro switch 822 is in a released state, and outputs a grounding closing signal.

[0063] In some embodiments, see Figure 1 , Figure 2 and Figure 3, a transmission gear 610 is provided on the housing 100, and a gear portion is provided on the output shaft 600. The transmission gear 610 is rotatably connected to the housing 100, and the transmission gear 610 is transmission-connected to the drive plate 500, and the transmission gear 610 is meshed with the gear portion. The transmission gear 610 is coaxially arranged with the drive plate 500, and is connected using a connecting key, and the drive plate 500 drives the transmission gear 610 to rotate, thereby driving the output shaft 600 to rotate.

[0064] In some embodiments, see Figure 2 and Figure 6 The driving plate 500 is provided with a guide notch 511, and the toggle groove 510 is located on the bottom wall of the guide notch 511. The guide notch 511 is used to guide the toggle protrusion 410 to be inserted into the toggle groove 510. The guide notch 511 is provided to ensure that the toggle protrusion 410 can be smoothly inserted into the toggle groove 510, thereby preventing the toggle protrusion 410 from being stuck with the driving plate 500.

[0065] In some embodiments, see Figure 2 and Figure 7 The housing 100 is provided with a mounting plate 110, and the mounting plate 110 is provided with a slide groove 111, and the length direction of the slide groove 111 is the axial direction of the screw rod 300. The nut 400 is provided with a sliding protrusion 420, and the sliding protrusion 420 is slidably connected in the slide groove 111. By providing the slide groove 111, the rotation of the nut 400 can be limited, and when the screw rod 300 rotates, the nut 400 can be driven to move along the axial direction of the screw rod 300.

[0066] In some embodiments, see Figure 1 and Figure 2 The housing 100 is also provided with a contactor 230, which is electrically connected to the motor 200 and is used to control the forward or reverse rotation of the motor 200. The forward and reverse rotation of the motor 200 is controlled by the contactor 230, thereby controlling the nut 400 to move from the first end to the second end along the axial direction of the screw rod 300, or controlling the nut 400 to move from the second end to the first end along the axial direction of the screw rod 300.

[0067] The box body 100 is also provided with an auxiliary switch 130, an industrial connector 120 and an indicator 140. The auxiliary switch 130 is used to send a work position signal, the industrial connector 120 is used for external power supply and signal, and the indicator 140 is used to indicate the position of the knife switch for easy observation.

[0068] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0069] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A three-position isolating grounding switch, characterized in that: include: Box; A motor, mounted on the box; A screw rod is rotatably connected to the box body, and the screw rod is drivingly connected to the motor; A nut is threadedly connected to the screw rod, the nut is slidably connected to the box body, and the motor is used to drive the screw rod to rotate so as to drive the nut to move along the axial direction of the screw rod; An output shaft, rotatably connected to the box body, the output shaft is drivingly connected to the nut, and the nut is used to drive the output shaft to rotate when moving; A control component, electrically connected to the motor, the control component comprising a first control micro switch and a second control micro switch, the first control micro switch and the second control micro switch are located at two ends of the moving track of the nut, and the first control micro switch and the second control micro switch are used to control the motor to stop working after being squeezed by the nut; A signal output component is installed on the box body, the signal output component is drivingly connected to the nut, and the signal output component is used to output a corresponding work position signal when the nut drives the output shaft to rotate.

2. A three-position isolating grounding switch according to claim 1, characterized in that: A toggle protrusion is protruding from the nut, a drive plate is provided on the box body, the drive plate is rotatably connected to the box body, a toggle groove for the toggle protrusion to extend into is provided on the drive plate, the toggle protrusion is used to push the inner wall of the toggle groove to drive the drive plate to rotate, the output shaft is transmission connected to the drive plate, and the signal output component is transmission connected to the drive plate.

3. A three-position isolating and grounding switch according to claim 2, characterized in that: The signal output component includes a cam plate and a micro switch component, the cam plate is rotatably connected to the box body, the cam plate is transmission-connected to the drive plate, a convex portion and a concave portion are provided on the cam plate, a distance from the convex portion to the rotation center of the cam plate is greater than a distance from the concave portion to the rotation center of the cam plate, and the cam plate is used to rotate to different positions so that the convex portion or the concave portion abuts against the micro switch component to control the output of a corresponding work position signal.

4. A three-position isolating and grounding switch according to claim 3, characterized in that: The micro switch assembly comprises an isolation opening micro switch, an isolation closing micro switch, a grounding closing micro switch and a grounding opening micro switch arranged around the cam plate; When the cam plate rotates to the opening position, the isolation opening micro switch and the grounding opening micro switch abut against the recessed portion, and output isolation opening and grounding opening signals; When the cam plate rotates to the isolation closing position, the isolation closing micro switch abuts against the recess and outputs an isolation closing signal; When the cam plate rotates to the grounding closing position, the grounding closing micro switch abuts against the recess and outputs a grounding closing signal.

5. A three-position isolating and grounding switch according to claim 4, characterized in that: There are two motors, two screw rods and two nuts, and there are two toggle protrusions. The two motors are respectively a first motor and a second motor, the two screw rods are respectively a first screw rod and a second screw rod, and the two nuts are respectively a first nut and a second nut. There are two toggle grooves on the drive plate. The first motor is used to drive the first nut to move through the first screw rod, and the second motor is used to drive the second nut to move through the second screw rod. The movement trajectory of the first nut and the movement trajectory of the second nut are located on both sides of the rotation center of the drive plate.

6. A three-position isolating and grounding switch according to claim 5, characterized in that: When the first nut is located at the first end of the first screw rod and the second nut is located at the first end of the second screw rod, the toggle protrusion on the first nut is staggered with the toggle groove and is located outside the moving track of the driving plate, the toggle protrusion on the second nut is staggered with the toggle groove and is located outside the moving track of the driving plate, and the cam plate is located at the opening position; When the first nut is located at the first end of the first screw rod and the second nut is located at the second end of the second screw rod, the toggle protrusion on the first nut is staggered from the toggle groove and is located outside the moving track of the driving plate, the toggle protrusion on the second nut extends into the corresponding toggle groove, and the cam plate is located at the isolation closing position; When the second nut is located at the first end of the second screw rod and the first nut is located at the second end of the first screw rod, the toggle protrusion on the second nut is offset from the toggle groove and is located outside the moving trajectory of the driving plate, the toggle protrusion on the first nut extends into the corresponding toggle groove, and the cam plate is located in the grounding closing position.

7. A three-position isolating and grounding switch according to claim 2, characterized in that: The housing is provided with a transmission gear, the output shaft is provided with a gear portion, the transmission gear is rotatably connected to the housing, the transmission gear is transmission-connected to the drive plate, and the transmission gear is meshed with the gear portion.

8. A three-position isolating and grounding switch according to claim 2, characterized in that: The driving plate is provided with a guide notch, the toggle groove is located on the bottom wall of the guide notch, and the guide notch is used to guide the toggle protrusion to be inserted into the toggle groove.

9. A three-position isolating and grounding switch according to claim 1, characterized in that: The box body is provided with a mounting plate, the mounting plate is provided with a slide groove, the length direction of the slide groove is the axial direction of the screw rod, the nut is protruded with a sliding protrusion, and the sliding protrusion is slidably connected in the slide groove.

10. A three-position isolating and grounding switch according to claim 1, characterized in that: The box body is also provided with a contactor, which is electrically connected to the motor and is used to control the forward or reverse rotation of the motor.

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