Operating mechanism of three-position disconnecting switch

Abstract

The invention discloses an operating mechanism of a three-station isolating switch, and relates to the field of switch contact operation structures, the operating mechanism comprises a housing, a hoisting plate is fixedly hoisted at the top of the inner side of the housing, an electric contact piece is also fixedly arranged in the hoisting plate, the electric contact piece extends towards the bottom of the hoisting plate, an electric wire is fixedly arranged at the top of the electric contact piece, and the electric wire is connected with the hoisting plate. A power transmission wire is fixedly arranged at the bottom of the inner side of the cover shell, a conductor connecting base is further fixedly arranged on the upper end face of the power transmission wire, a grounding wire fixed in the cover shell is further arranged on the outer side of the power transmission wire, and a grounding contact piece is further fixedly arranged at the end of the grounding wire. Three states of the three-station isolation switch can be safely switched through the operation unit, large striking noise cannot be generated in the switching process, meanwhile, when the three-station isolation switch is switched to the isolation state, through the effect of the isolation auxiliary unit, the situation that voltage at the end of a knife switch breaks through air to transmit electric energy to an electric wire can be effectively avoided, and the safety of the three-station isolation switch is improved. And electric equipment faults are caused.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of switch contact operating structure, in particular to a three-position isolating switch operating mechanism. BACKGROUND

[0002] The three-position isolating switch is a power electronic component commonly used in industrial equipment, which can realize three states (power-on state, isolation state, grounding state) of the circuit through the position transformation of a knife, and the isolation state is the position between the power-on state and the grounding state, and the knife does not contact the grounding wire or the power wire.

[0003] In order to ensure the safety of power use, the three-position isolating switch is adjusted by mechanical operation, and the position of the knife is moved by a wrench during operation, so that the knife hits the grounding wire or the power wire, and a large impact noise is generated during closing. When the operating knife is in the isolation state, the effective isolation between the knife and the power wire cannot be guaranteed (if the distance between the knife and the power wire is too close, high voltage will break through the air and transmit power to the power wire), so there is still a certain safety hazard when the knife is operated to the isolation state in the commonly used three-position isolating switch. SUMMARY

[0004] The purpose of the present application is to provide a three-position isolating switch operating mechanism to solve the problems in the background art.

[0005] To achieve the above purpose, the present application provides the following technical scheme: a three-position isolating switch operating mechanism, comprising: a housing, a hoisting plate is fixedly hoisted on the inner top of the housing, and a power contact is further fixedly arranged in the inner part of the hoisting plate, the power contact extends to the bottom of the hoisting plate, a power wire is fixedly arranged on the top of the power contact, a power transmission wire is fixedly arranged on the inner bottom of the housing, a conductor connecting seat is further fixedly arranged on the upper end surface of the power transmission wire, a grounding wire fixedly arranged in the inner part of the housing is further arranged on the outer side of the power transmission wire, a grounding contact is further fixedly arranged on the end of the grounding wire, a knife is hingedly assembled on the outer part of the conductor connecting seat, and an operating unit for driving the knife to swing is further arranged in the inner part of the housing. When the knife and the power contact are closed, it is in the power-on state. When the knife and the grounding contact are closed, it is in the grounding state. When the knife does not contact the grounding contact and the power contact, it is in the isolation state. Further comprising: an isolation auxiliary unit for physically blocking the power contact and the knife to avoid the end of the knife from breaking through the air and electrifying the power contact.

[0006] Preferably, the power supply contact and the grounding contact are arranged at an angle of 90 degrees with the hinge point of the blade and the conductor connecting base as the center, the number of the blades is two and symmetrically arranged, the power supply contact or the grounding contact is slidingly assembled between the two ends of the blades away from the conductor connecting base, and the edges of the power supply contact and the grounding contact are provided with bevel chamfers.

[0007] Preferably, the end of each blade is provided with a notch, and a conductor spring is arranged in the notch, the end of the conductor spring close to the conductor connecting base is fixed to the notch, and the end faces of the two conductor springs close to each other are further provided with conductive contacts, the connection part of the conductor spring and the notch is an elastic conductor, and the end faces of the two conductive contacts close to each other are provided with round chamfers, so that the power supply contact or the grounding contact is more convenient to insert between the two conductive contacts.

[0008] Preferably, the operation unit comprises an extension frame fixed between the two blades, the end of the extension frame extending out of the blade is hingedly assembled with a circular arc rack, the inside of the circular arc rack is provided with a circular arc groove, an arc-shaped limiting plate is slidingly embedded in the circular arc groove, the arc-shaped limiting plate is fixedly arranged in the inside of the cover, the outside of the circular arc rack is further engagedly assembled with a gear, the inside of the gear is fixedly provided with a rotating rod, the inner wall of the cover is fixedly provided with a gear differential, the output end of the gear differential is fixedly assembled with the end of the rotating rod, the input end of the gear differential is rotatably penetrated through the cover, the input end of the gear differential is fixedly sleeved with a rotating disc, and the end of the rotating disc away from the cover is fixedly provided with a hexagonal nut.

[0009] Preferably, the gear differential is a gear speed-up structure, which is used to make the rotation angle and rotation direction of the rotating disc and the circular arc rack consistent.

[0010] Preferably, the center of the circular arc groove is the hinge point of the blade and the conductor connecting base.

[0011] Preferably, the rotating disc and the shell are further provided with positioning components, the positioning components comprise three positioning holes opened in the shell, the three positioning holes are circumferentially and equiangularly distributed on the periphery of the rotating disc, the included angle between two adjacent rotating discs is forty-five degrees, a limiting sleeve is fixedly arranged on the end of the rotating disc away from the shell, the limiting sleeve is located at the edge of the rotating disc, a sliding disc is slidably arranged in the limiting sleeve, a dome-shaped positioning rod is fixedly arranged in the sliding disc and penetrates through the rotating disc, the dome-shaped positioning rod is movably embedded in the positioning hole, a tension spring is fixedly arranged between the end of the sliding disc close to the shell and the rotating disc, and a blocking piece is further arranged between the shell and the dome-shaped positioning rod.

[0012] Preferably, the blocking piece comprises arc-shaped blocking pieces attached to the ends of the three positioning holes away from the rotating disc, two symmetrical vertical columns are fixedly arranged on the end of each arc-shaped blocking piece away from the shell, an L-shaped block is slidably arranged on the outer surface of each vertical column, the L-shaped block is fixedly arranged on the shell, a second spring is arranged on the outer surface of each vertical column, and the two ends of the second spring are fixedly arranged on the arc-shaped blocking piece and the vertical column.

[0013] Preferably, the end of the limiting sleeve away from the shell is further provided with a locking piece, the locking piece comprises an eccentric cam block movably embedded in the end of the limiting sleeve away from the shell, a rotating shaft is eccentrically and fixedly arranged in the eccentric cam block, and the end surface of the rotating shaft is in interference rotating arrangement with the limiting sleeve.

[0014] Preferably, the isolation auxiliary unit comprises a limiting frame fixedly arranged on the upper end of the hoisting plate, a connecting plate is elastically and rotatingly arranged on the top outer side of the limiting frame through a torsion spring and a bolt, the connecting plate is located on the side of the hoisting plate close to the grounding contact piece, an arc-bottom sleeve frame is arranged below the connecting plate, a sliding rod is slidably and embedded in the arc-bottom sleeve frame and fixedly arranged on the lower end surface of the connecting plate, a first spring is arranged on the outer surface of the sliding rod, and the two ends of the first spring are fixedly arranged on the connecting plate and the arc-bottom sleeve frame, the arc bottom of the arc-bottom sleeve frame is located on the side of the arc-bottom sleeve frame away from the hoisting plate, the arc-bottom sleeve frame is made of hard plastic material, and a rubber layer is further fixedly arranged on the inner wall of the arc-bottom sleeve frame.

[0015] Compared with the prior art, the present application has the following advantages: The three-position isolating switch can be switched among three states safely by the operation unit, and no large impact noise is generated during the switching process, and when switched to the isolation state, the end voltage of the contactor can effectively avoid breaking through the air to transmit electric energy to the electric wire, and the effect of preventing arc or no arc can be effectively achieved, and the electric equipment failure can be avoided, so that the three-position isolating switch manufactured in the scheme is used for controlling the electric state of the industrial equipment, and the safety is higher. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a whole structure schematic view of the present application; Figure 2 It is a side view of the present application; Figure 3 It is a schematic view of the internal structure of the cover of the present application; Figure 4 It is a schematic view of the circular arc rack and gear structure of the present application; Figure 5 It is a schematic view of the conductor spring and conductive contact structure of the present application; Figure 6 It is a schematic view of the arc bottom sleeve frame structure of the present application; Figure 7 It is a schematic view of the arc-shaped baffle and positioning hole structure of the present application; Figure 8 It is a schematic view of the hexagonal nut and rotating disc structure of the present application; Figure 9 It is a schematic view of the internal structure of the limiting sleeve of the present application.

[0017] In the figure: 1, cover; 2, power transmission wire; 3, electric wire; 4, grounding wire; 5, electric contact piece; 6, grounding contact piece; 7, conductor connecting seat; 8, contactor; 9, slot; 10, conductor spring; 11, conductive contact; 12, hoisting plate; 13, extension frame; 14, arc-shaped limiting plate; 15, circular arc rack; 16, circular arc groove; 17, rotating rod; 18, gear; 19, gear differential; 20, rotating disc; 21, hexagonal nut; 22, limiting frame; 23, connecting plate; 24, arc bottom sleeve frame; 25, sliding rod; 26, first spring; 27, positioning hole; 28, L-shaped block; 29, stand column; 30, arc-shaped baffle; 31, second spring; 32, limiting sleeve; 33, sliding disc; 34, dome positioning rod; 35, tension spring; 36, rotating shaft; 37, eccentric cam block. DETAILED DESCRIPTION

[0018] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0019] Embodiment one: please refer to Figures 1-7 , the operating mechanism of a three-position isolating switch is shown in the figure, which comprises: a cover 1, a hoisting plate 12 is fixedly hoisted on the inner top of the cover 1, and a power contact 5 is further fixedly arranged inside the hoisting plate 12, the power contact 5 extends to the bottom of the hoisting plate 12, a power line 3 is fixedly arranged on the top of the power contact 5, a power transmission line 2 is fixedly arranged on the inner bottom of the cover 1, and a conductor connecting seat 7 is further fixedly arranged on the upper end face of the power transmission line 2, a grounding line 4 is further arranged on the outer side of the power transmission line 2 and fixedly arranged inside the cover 1, and a grounding contact 6 is further fixedly arranged on the end of the grounding line 4, a blade 8 is hingedly assembled on the outside of the conductor connecting seat 7, and an operating unit for driving the blade 8 to swing is further arranged inside the cover 1; When the blade 8 is closed with the power contact 5, it is in the power-on state; When the blade 8 is closed with the grounding contact 6, it is in the grounding state; When the blade 8 is not in contact with the grounding contact 6 and the power contact 5, it is in the isolation state; It further comprises an isolation auxiliary unit for physically isolating the power contact 5 and the blade 8 to prevent the end of the blade 8 from breaking through the air and electrifying the power contact 5.

[0020] The power contact 5 and the grounding contact 6 are distributed at a ninety-degree angle with the hinge point of the blade 8 and the conductor connecting seat 7 as the center, the number of the blades 8 is two and they are symmetrically distributed, the power contact 5 or the grounding contact 6 is slidingly assembled between the ends of the two blades 8 away from the conductor connecting seat 7, and the edges of the power contact 5 and the edges of the grounding contact 6 are provided with bevel chamfers, when the blade 8 is in the vertical state, the end thereof is assembled with the power contact 5, when the blade 8 is in the horizontal state, the end thereof is assembled with the grounding contact 6, and the bevel chamfer is designed to facilitate the assembly of the power contact 5 and the grounding contact 6 between the ends of the two blades 8.

[0021] The end of each blade 8 is provided with a notch 9, and a conductor spring 10 is arranged in the notch 9. The end of the conductor spring 10 close to the conductor connecting seat 7 is fixed to the notch 9, and the end face of the two conductor springs 10 close to each other is further provided with a conductive contact 11. The connecting part of the conductor spring 10 and the notch 9 is an elastic conductor, and the two conductive contacts 11 can be close to each other and elastically fit through the elastic conductor. The end face of the two conductive contacts 11 close to each other is provided with a round chamfer, which is more convenient for the electric contact piece 5 or the grounding contact piece 6 to be inserted between the two conductive contacts 11.

[0022] The operation unit comprises an extension frame 13 fixed between the two blades 8. The end of the extension frame 13 extending out of the blade 8 is hingedly assembled with a circular arc rack 15, and the circular arc rack 15 is provided with a circular arc groove 16 in the inside. An arc-shaped limiting plate 14 is slidably embedded in the circular arc groove 16, and the arc-shaped limiting plate 14 is fixedly arranged in the inside of the shell 1. The outside of the circular arc rack 15 is further meshingly assembled with a gear 18, and the inside of the gear 18 is fixedly provided with a rotating rod 17. The inner wall of the shell 1 is fixedly provided with a gear differential 19, and the output end of the gear differential 19 is fixedly assembled with the end of the rotating rod 17. The input end of the gear differential 19 is rotatably penetrated through the shell 1, and the input end of the gear differential 19 is fixedly sleeved with a rotating disc 20. The end of the rotating disc 20 away from the shell 1 is fixedly provided with a hexagonal nut 21. After the wrench sleeve is assembled with the hexagonal nut 21, the rotating disc 20 can be rotated through the hexagonal nut 21, which can touch the gear differential 19 and make the gear 18 drive the circular arc rack 15 to rotate. The circular arc rack 15 can push the blade 8 through the extension frame 13, so that the blade 8 swings.

[0023] The gear differential 19 is a gear speed-up structure, which is used to make the rotation angle and rotation direction of the rotating disc 20 and the circular arc rack 15 consistent. When the hexagonal nut 21 is rotated clockwise by ninety degrees through the wrench sleeve, the circular arc rack 15 can be synchronously and directionally rotated by ninety degrees.

[0024] The center of the circular arc groove 16 is the hinge point of the blade 8 and the conductor connecting seat 7, so as to ensure that the blade 8 will not be jammed when the circular arc rack 15 deflects.

[0025] The isolation auxiliary unit comprises a limiting frame 22 fixedly arranged on the upper end face of the hoisting plate 12, and the top outer side of the limiting frame 22 is elastically rotatably provided with a connecting plate 23 through a torsion spring and a latch, the connecting plate 23 is located on the side of the hoisting plate 12 close to the grounding contact 6, an arc bottom sleeve frame 24 is arranged below the connecting plate 23, a sliding rod 25 slidingly embedded in the arc bottom sleeve frame 24 is fixedly arranged on the lower end face of the connecting plate 23, a first spring 26 is sleeved outside the sliding rod 25, and the two ends of the first spring 26 are fixedly connected with the connecting plate 23 and the arc bottom sleeve frame 24 respectively, and the arc bottom of the arc bottom sleeve frame 24 is located on the side of the arc bottom sleeve frame 24 away from the hoisting plate 12. Under the elastic pressure of the torsion spring, the arc bottom sleeve frame 24 can be elastically attached to the outer wall of the hoisting plate 12, when the blade 8 swings clockwise, the arc bottom sleeve frame 24 can be pushed and elastically turned over, and when the blade 8 resets counterclockwise, the arc bottom sleeve frame 24 can be pushed upward through the arc bottom. The arc bottom sleeve frame 24 is made of hard plastic material, and a rubber layer is further fixedly arranged on the inner wall of the arc bottom sleeve frame 24.

[0026] Embodiment two: please refer to Figure 7 and Figure 8 This embodiment is a further description of other embodiments. The rotating disc 20 and the cover shell 1 are further provided with a positioning component. The positioning component comprises three positioning holes 27 arranged in the cover shell 1. The three positioning holes 27 are circumferentially and equiangularly distributed on the periphery of the rotating disc 20, and the included angle between any two adjacent rotating discs 20 is forty-five degrees. A limiting sleeve 32 is fixedly arranged on the end face of the rotating disc 20 away from the cover shell 1, and the limiting sleeve 32 is located at the edge of the rotating disc 20. A sliding disc 33 is slidingly arranged in the limiting sleeve 32, and a dome-shaped positioning rod 34 is slidingly arranged in the sliding disc 33 and penetrates through the rotating disc 20. The dome-shaped positioning rod 34 is movably embedded in the positioning hole 27. A tension spring 35 is fixedly arranged between the end face of the sliding disc 33 close to the cover shell 1 and the rotating disc 20. A blocking piece is further arranged between the cover shell 1 and the dome-shaped positioning rod 34. When the dome-shaped positioning rod 34 is elastically embedded in the positioning hole 27, the dome-shaped positioning rod 34 will knock the blocking piece. The staff can be prompted by the sound generated by knocking the blocking piece that the blade 8 is in a certain state. When the dome-shaped positioning rod 34 is respectively embedded in the three positioning holes 27 from top to bottom, the blade 8 is respectively in the power-on state, the isolation state and the grounding state.

[0027] The blocking piece comprises an arc-shaped blocking sheet 30 which is attached to the end face of the three positioning holes 27 away from the rotating disc 20, and two vertically arranged columns 29 are fixedly arranged on the end face of the arc-shaped blocking sheet 30 away from the cover 1, and the outer surface of each column 29 is slidably sleeved with an L-shaped block 28, the L-shaped block 28 is fixedly assembled with the cover 1, and the outer surface of each column 29 is arranged with a second spring 31, and the two ends of the second spring 31 are fixedly connected with the arc-shaped blocking sheet 30 and the column 29 respectively, the elastic stiffness of the tension spring 35 is smaller than that of the second spring 31, and the sliding disc 33 is elastically pressed by the tension spring 35, so that the end of the dome-shaped positioning rod 34 is abutted against the end face of the arc-shaped blocking sheet 30, and the arc-shaped blocking sheet 30 cannot be pushed, and the depth of the positioning hole 27 is smaller than the radius of the dome-shaped positioning rod 34, so that when the dome-shaped positioning rod 34 is subjected to a large deflection force, the dome-shaped end of the dome-shaped positioning rod 34 is moved out of the inside of the positioning hole 27.

[0028] Embodiment three: please refer to Figure 8 and Figure 9 , this embodiment is a further description of other embodiments, the end face of the limiting sleeve 32 away from the cover 1 is further provided with a locking piece, the locking piece comprises an eccentric cam block 37 which is movably embedded in the end face of the limiting sleeve 32 away from the cover 1, the inside of the eccentric cam block 37 is eccentrically fixedly provided with a rotating shaft 36, and the end face of the rotating shaft 36 is interference rotatingly assembled with the limiting sleeve 32, when the eccentric cam block 37 is rotated through the rotating shaft 36, the center end of the eccentric cam block 37 can push the dome-shaped positioning rod 34, so that the dome-shaped end of the dome-shaped positioning rod 34 is completely embedded in the positioning hole 27 and the arc-shaped blocking sheet 30 is pushed, thereby avoiding that the dome-shaped positioning rod 34 is pushed out of the inside of the positioning hole 27 by external force, and the stability of the three-position disconnecting switch state is ensured.

[0029] Working principle: taking the display state in Figure 3 as an example, at this time, the blade 8 is in a vertical state, and the two conductive contacts 11 at the end of the blade 8 are elastically clamped by the power contact 5, and are in a power-on state, if at this time it is needed to switch the three-position disconnecting switch to an isolation state, the sleeve wrench and the hexagonal nut 21 are assembled, and the hexagonal nut 21 and the rotating disc 20 are rotated clockwise by forty-five degrees, in the process of rotating, the end of the blade 8 can push the arc-bottom sleeve frame 24, until the arc-bottom sleeve frame 24 is pushed away from the end of the blade 8, at this time, the arc-bottom sleeve frame 24 is elastically reset under the action of the torsional spring, and the arc-bottom sleeve frame 24 is blocked between the power contact 5 and the end of the blade 8, through the physical separation of the arc-bottom sleeve frame 24 and the rubber layer, the voltage of the end of the blade 8 can be effectively avoided to break through the air and be connected with the power contact 5; when the three-position disconnecting switch needs to be switched to a grounding state, the rotating disc 20 can be continuously rotated clockwise by forty-five degrees, so that the two conductive contacts 11 at the end of the blade 8 clamp and connect with the grounding contact 6, that is, the grounding operation is completed.

[0030] In the scheme, after the state switching of the three-position isolating switch is completed, the eccentric cam block 37 can be swung through the rotating shaft 36, the end of the dome positioning rod 34 is pushed through the far end of the eccentric cam block 37, so that the other dome end of the dome positioning rod 34 is fully embedded in the inside of the positioning hole 27, the arc-shaped baffle 30 is pushed away, at this time, through the embedding of the positioning hole 27 and the dome positioning rod 34, the rotating disc 20 can be avoided to rotate on the outer wall of the cover 1, thereby avoiding the case of misoperation, and when the next time the state of the three-position isolating switch needs to be switched again, the eccentric cam block 37 needs to be reset first, and then the rotating disc 20 can be rotated, so that the three-position isolating switch produced in the scheme can effectively play the effect of preventing arc or no arc, and can avoid that the voltage at the end of the contactor 8 breaks through the air and the power contact 5 after the switch is opened.

[0031] It should be noted that, in this document, the terms such as first and second are used only to distinguish one entity or operation from another, and do not necessarily require or imply these entities or operations have any such actual relationship or order. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.

[0032] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made thereto without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. An operating mechanism for a three-position disconnect switch, characterized in that: include: A cover (1), wherein a hanging plate (12) is fixedly mounted on the top of the inner side of the cover (1), and an electric contact piece (5) is fixedly arranged inside the hanging plate (12), an electric wire (3) is fixedly arranged on the top of the electric contact piece (5), a power transmission wire (2) is fixedly arranged on the bottom of the inner side of the cover (1), and a conductor connection seat (7) is fixedly arranged on the upper end surface of the power transmission wire (2), a grounding wire (4) fixed inside the cover (1) is also arranged on the outer side of the power transmission wire (2), and a grounding contact piece (6) is fixedly arranged on the end of the grounding wire (4), a knife switch (8) is hingedly mounted on the outside of the conductor connection seat (7), and an operating unit for driving the knife switch (8) to swing is also arranged inside the cover (1); Also includes: The isolation auxiliary unit is used to physically isolate the power contact piece (5) and the knife switch (8) to prevent the end of the knife switch (8) from breaking through the air and being energized by the power contact piece (5).

2. The operating mechanism of a three-position disconnect switch according to claim 1, characterized in that: With the hinge point between the switch blade (8) and the conductor connection seat (7) as the center, the power contact piece (5) and the grounding contact piece (6) are distributed at a ninety-degree angle, the number of the switch blades (8) is two, and the power contact piece (5) or the grounding contact piece (6) is slidably assembled between the two switch blades (8), and the edges of the power contact piece (5) and the edges of the grounding contact piece (6) are both provided with bevel chamfers.

3. The operating mechanism of a three-position disconnect switch according to claim 2, characterized in that: A notch (9) is provided at the end of each of the switch blades (8), and a conductor spring (10) is placed inside the notch (9). An end of the conductor spring (10) close to the conductor connection seat (7) is fixed to the notch (9), and a conductive contact (11) is fixedly provided on the end surfaces of the two conductor springs (10) close to each other. The connection portion between the conductor spring (10) and the notch (9) is an elastic conductor.

4. The operating mechanism of a three-position disconnect switch according to claim 2, characterized in that: The operating unit includes an extension frame (13) fixed between the two gate knives (8), the end of the extension frame (13) extending from the gate knives (8) is hingedly equipped with an arc rack (15), and an arc groove (16) is provided inside the arc rack (15), and an arc limit plate (14) is slidably installed inside the arc groove (16), the outside of the arc rack (15) is also meshed with a gear (18), and a rotating rod (17) is fixedly provided inside the gear (18), a gear differential (19) is fixedly provided on the inner wall of the cover (1), and the output end of the gear differential (19) is fixedly assembled with the end of the rotating rod (17), the input end of the gear differential (19) is fixedly provided with a turntable (20), and the end of the turntable (20) away from the cover (1) is fixedly provided with a hexagonal nut (21).

5. The operating mechanism of a three-position disconnector according to claim 4, characterized in that: The gear differential (19) is a gear speed increasing structure, which is used to make the rotation angle and rotation direction of the turntable (20) and the circular arc rack (15) consistent.

6. The operating mechanism of a three-position disconnector according to claim 4, characterized in that: The center of the circular arc groove (16) is the hinge point between the knife switch (8) and the conductor connection seat (7).

7. The operating mechanism of a three-position disconnector according to claim 6, characterized in that: A positioning component is also provided between the turntable (20) and the cover (1), and the positioning component includes three positioning holes (27) opened inside the cover (1). The three positioning holes (27) are distributed at equal angles on the periphery of the turntable (20) in a circle, and the angle between two adjacent turntables (20) is forty-five degrees. A limiting sleeve (32) is fixedly provided on one end face of the turntable (20) away from the cover (1), and a sliding disc (33) is slidably assembled inside the limiting sleeve (32), and a dome positioning rod (34) that slides through the turntable (20) is fixedly provided inside the sliding disc (33), and the dome positioning rod (34) is movably engaged with the positioning hole (27). A tension spring (35) is fixedly provided between the end face of the sliding disc (33) close to the cover (1) and the turntable (20), and a blocking member is also provided between the cover (1) and the dome positioning rod (34).

8. The operating mechanism of a three-position disconnector according to claim 7, characterized in that: The blocking member comprises an arc-shaped blocking piece (30) fitted on one end face of the three positioning holes (27) away from the turntable (20), two columns (29) are fixedly provided on one end face of the arc-shaped blocking piece (30) away from the cover shell (1), and an L-shaped block (28) is slidingly sleeved on the outer surface of each column (29), and a second spring (31) is distributed on the outside of each column (29), and two ends of the second spring (31) are respectively connected to the arc-shaped blocking piece (30) and the column (29).

9. The operating mechanism of a three-position disconnector according to claim 8, characterized in that: A locking member is further provided on one end face of the limiting sleeve (32) away from the cover shell (1), and the locking member comprises an eccentric cam shift block (37) movably mounted on one end face of the limiting sleeve (32) away from the cover shell (1), a rotating shaft (36) is fixedly provided eccentrically inside the eccentric cam shift block (37), and the rotating shaft (36) and the limiting sleeve (32) are rotatably assembled.

10. The operating mechanism of a three-position disconnect switch according to claim 4, characterized in that: The isolation auxiliary unit includes a limit frame (22) fixedly mounted on the upper end surface of the hanging plate (12), and a connecting plate (23) is elastically rotatably mounted on the outer side of the top of the limit frame (22), and the connecting plate (23) is located on the side of the hanging plate (12) close to the grounding contact (6), and an arc bottom sleeve (24) is provided below the connecting plate (23), and a sliding rod (25) is fixedly provided on the lower end surface of the connecting plate (23) and is slidably mounted inside the arc bottom sleeve (24), and a first spring (26) is sleeved on the outside of the sliding rod (25), and the two ends of the first spring (26) are respectively fixed to the connecting plate (23) and the arc bottom sleeve (24).

Images