A three-phase synchronous electric switch

Abstract

This invention relates to the field of disconnector switch technology, specifically to a three-phase synchronous electric switch, comprising a base, a first conductive arm, a second conductive arm, and an elastic element. Three first insulators and three second insulators are rotatably mounted on the base. The first conductive arm includes a first conductive sheet and an elastic sheet, with a flared end of the first conductive sheet away from the first insulator forming a trumpet-shaped opening. The second conductive arm includes a second conductive sheet, both the first and second conductive sheets extending horizontally, with a conductive contact at the end of the second conductive sheet away from the second insulator. The elastic element is disposed on the first conductive sheet and corresponds to the position of the flared opening. The elastic element has a tendency to cause the flared opening of the first conductive sheet to contract. The elastic element allows the flared opening of the first conductive sheet to press inward against the conductive contact of the second conductive sheet, thereby achieving conductive contact between the first and second conductive arms and ensuring conductive stability.

Description

Technical Field

[0001] This invention relates to the field of disconnector technology, and in particular to a three-phase synchronous electric switch. Background Technology

[0002] Three-phase synchronous electric switches are high-voltage electrical equipment used in three-phase AC systems, mainly for circuit isolation and switching operations under no-load conditions.

[0003] For example, patent document CN206040500U discloses a medium-voltage distribution network intelligent disconnect switch, including a three-phase switching mechanism arranged in a front-to-back direction. Each phase has two insulating supports arranged in a left-to-right direction, and each insulating support is equipped with a conductive arm at its end. The conductive arm has a conductive part and is arranged horizontally on top of the insulating support. The two insulating supports can rotate 90° to make the conductive parts on the two conductive arms contact each other. However, existing conductive arms are composed of conductive blocks and U-shaped groove structures, with the guide block entering the U-shaped groove to achieve closing. This structure results in insufficient clamping force between the two conductive arms, leading to unstable contact and affecting the opening and closing effect of the disconnect switch. Summary of the Invention

[0004] Therefore, it is necessary to provide a three-phase synchronous electric switch to address the technical problem of low contact pressure of the conductive arm in the current disconnecting switch, which leads to unstable contact and affects the opening and closing effect.

[0005] The above objectives are achieved through the following technical solutions:

[0006] A three-phase synchronous electric switch includes a base, first conductive arms, second conductive arms, and elastic elements. The base is an integrally formed structure. Three first insulators and three second insulators are rotatably mounted on the base. The axes of the first and second insulators extend vertically, and the first and second insulators are arranged in a one-to-one correspondence. Three first conductive arms are provided, each mounted on a first insulator. Each first conductive arm includes a first conductive sheet and an elastic sheet. The first conductive sheet extends horizontally, and its end forms a flared opening that can contract horizontally. Three second conductive arms are provided. Each second conductive arm is respectively disposed on each second insulator. The second conductive arm includes a second conductive sheet, which extends horizontally and has a conductive contact at its end. The elastic element is disposed on the first conductive sheet and corresponds to the position of the flared opening. The elastic element has a tendency to shrink the flared opening of the first conductive sheet. When the circuit is closed, the first conductive arm and the corresponding second conductive arm approach each other, and the conductive contact of each second conductive sheet can enter the flared opening of the corresponding first conductive sheet. The elastic element allows the flared opening of the first conductive sheet to press the conductive contact of the second conductive sheet inward, thereby achieving conductive contact between the first conductive arm and the second conductive arm.

[0007] Furthermore, the first conductive sheet includes two first bending plates, the ends of which are bent to form a first opening. The first opening faces the horizontal direction, and the first openings of the two first bending plates are arranged opposite each other to form a flared horn shape.

[0008] Furthermore, each of the first bending plates is provided with a plurality of first dividing seams at the position corresponding to the first opening. The first dividing seams extend in the horizontal direction and the plurality of first dividing seams are distributed in the vertical direction, thereby dividing the end of each of the first bending plates into at least three first contact portions, with a gap between two adjacent first contact portions.

[0009] Furthermore, the elastic element includes two elastic sheets, each corresponding to one of the two first bending plates. The elastic sheets extend horizontally, and each end of the elastic sheet has an L-shaped hook with the opening of the L-shaped hook facing the end of its corresponding first bending plate.

[0010] Furthermore, the second conductive sheet includes two second bent plates, the ends of which are bent to form second openings. The second openings face horizontally, and the second openings of the two second bent plates are arranged opposite each other to form the conductive contact. The ends of the second bent plates correspond one-to-one with the ends of the first bent plates and can make conductive contact.

[0011] Furthermore, each of the second bending plates is provided with a plurality of second dividing grooves at the position corresponding to the second opening. The second dividing grooves extend in the horizontal direction and the plurality of second dividing grooves are distributed in the vertical direction to divide the end of the second bending plate into at least three second contact portions. Two adjacent second contact portions are in contact with each other. The number of second contact portions is less than the number of first contact portions. Each second contact portion can correspond to and contact one first contact portion.

[0012] Furthermore, at least three first contact portions are alternately divided into first contact pieces and second contact pieces from top to bottom. The second contact piece is bent to form a first protrusion, which is disposed facing the inside of the flared opening.

[0013] Furthermore, each of the second contact portions is bent to form a second protrusion, which is disposed towards the outside of the flared opening. The second protrusion can contact the first contact piece or the first protrusion on the second contact piece.

[0014] Furthermore, the elastic sheet is provided with a plurality of clearance grooves, each of which corresponds to a second contact piece. When the second protrusion contacts the first protrusion on the second contact piece, the second contact piece can expand outward and enter the clearance groove.

[0015] Furthermore, the first conductive arm also includes two first mounting plates, which are located outside the two first bending plates respectively. The elastic sheet corresponds one-to-one with the first mounting plate and is fixedly mounted on the first mounting plate. A butterfly spring is provided between the first bending plate and the first mounting plate, and the butterfly spring is used to press the first bending plate.

[0016] The beneficial effects of this invention are:

[0017] The present invention provides a three-phase synchronous electric switch, in which the elastic element itself has elasticity and can continuously apply contraction force, so that the flared opening can press the conductive contact to form a reliable elastic contact, thereby compensating for the gap changes caused by wear or thermal expansion and contraction when the first conductive arm and the second conductive arm make conductive contact, and ensuring conductive stability.

[0018] Secondly, the end of the first bent plate is divided into at least three first contact portions by the first partition slit. These three first contact portions are independent of each other. Even if one first contact portion experiences poor contact due to wear, oxidation, or misalignment, the remaining first contact portions can still conduct electricity. This avoids the common failure of traditional single-contact structures that can lead to overall circuit breakage, thus improving the operational reliability of the switch. At the same time, the first partition slit can form a heat dissipation channel, allowing the heat generated by the conductive contact between the first conductive arm and the second conductive arm to be dissipated in a timely manner, extending the service life of the first and second conductive arms.

[0019] Third, a first protrusion is provided on the second contact of the first conductive sheet, and a second protrusion is provided on the second contact portion of the second conductive sheet. When the second protrusion contacts the first protrusion, the second protrusion can push the second contact into the relief groove, while the second protrusion enters between two adjacent first contacts, so that the second protrusion can make conductive contact with the two adjacent first contacts, thereby increasing the overall conductive contact area between the first contact portion and the second contact portion and improving the conductive stability of the first conductive arm and the second conductive arm. Attached Figure Description

[0020] Figure 1 A three-dimensional structural schematic diagram of a three-phase synchronous electric switch provided in the first embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the first conductive arm and the second conductive arm closing in the three-phase synchronous electric switch provided in the first embodiment of the present invention.

[0022] Figure 3 for Figure 2 Enlarged view of the structure at point A in the middle;

[0023] Figure 4 This is a partial structural diagram of the three-phase synchronous electric switch provided in the first embodiment of the present invention when the first conductive arm and the second conductive arm are closed.

[0024] Figure 5 This is an exploded structural diagram of the first conductive arm and the second conductive arm in the three-phase synchronous electric switch provided in the first embodiment of the present invention.

[0025] Figure 6 This is a schematic diagram of the first conductive arm and the second conductive arm closing in the three-phase synchronous electric switch provided in the second embodiment of the present invention.

[0026] Figure 7 for Figure 6 Enlarged view of the structure at point B in the middle;

[0027] Figure 8 This is a schematic diagram of the first conductive arm and the second conductive arm of the three-phase synchronous electric switch provided in the second embodiment of the present invention when the switch is opened.

[0028] Figure 9 This is a partial schematic diagram of the first conductive arm and the second conductive arm of the three-phase synchronous electric switch provided in the second embodiment of the present invention when they are closed.

[0029] Figure 10 This is an exploded structural diagram of the first conductive arm and the second conductive arm in a three-phase synchronous electric switch provided in the second embodiment of the present invention.

[0030] in:

[0031] 100. Base; 200. First conductive arm; 210. First bending plate; 211. First contact part; 2111. First contact piece; 2112. Second contact piece; 2113. First partition; 212. Elastic piece; 213. First mounting plate; 214. First protrusion; 215. Clearance groove; 300. Second conductive arm; 310. Second bending plate; 311. Second contact part; 313. Second mounting plate; 312. Second protrusion; 400. First insulator; 500. Second insulator; 601. Synchronizing rod; 602. Transmission rod; 603. Drive shaft; 701. First mounting base; 702. Disc spring. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0033] The component designations used in this document, such as "first" and "second," are merely for distinguishing the described objects and do not have any sequential or technical meaning. The terms "connection" and "linkage" used in this invention, unless otherwise specified, include both direct and indirect connections (linkages). It should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0034] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0035] like Figures 1 to 5As shown, a three-phase synchronous electric switch according to the first embodiment of the present invention includes a base 100, a first conductive arm 200, a second conductive arm 300, and an elastic element. Three first insulators 400 and three second insulators 500 are rotatably mounted on the base 100, with the axes of both the first insulators 400 and the second insulators 500 extending vertically. The three first insulators 400 and the three second insulators 500 are arranged in rows horizontally, with the arrangement direction of the three first insulators 400 parallel to that of the three second insulators 500. The first insulators 400 and the second insulators 500 correspond one-to-one with each other perpendicular to the arrangement direction. The base 100 is an integrally formed structure, making the three-phase synchronous electric switch more stable during opening and closing.

[0036] There are three first conductive arms 200, each disposed on a first insulator 400. Each first conductive arm 200 includes a first conductive sheet and an elastic sheet 212. The first conductive sheet extends horizontally, and the end of the first conductive sheet away from the first insulator 400 forms a flared opening. The flared opening can contract horizontally. The flared opening is designed to guide the conductive contact, ensuring that even with slight deviations, the conductive contact can be accurately guided into the flared opening, reducing the requirements for processing and assembly precision and improving the success rate of closing the circuit.

[0037] There are three second conductive arms 300, each of which is respectively disposed on each second insulator 500. Each second conductive arm 300 includes a second conductive sheet, which extends horizontally and has a conductive contact at its end away from the second insulator 500.

[0038] The elastic element is disposed on the first conductive sheet and corresponds to the position of the flared opening. The elastic element has a tendency to cause the flared opening of the first conductive sheet to contract. When the circuit is closed, the first conductive arm 200 and the corresponding second conductive arm 300 approach each other, and the conductive contacts of each second conductive sheet can enter the flared opening of the corresponding first conductive sheet. The elastic element causes the flared opening of the first conductive sheet to press inward against the conductive contacts of the second conductive sheet, thereby achieving conductive contact between the first conductive arm 200 and the second conductive arm 300.

[0039] Because the elastic element itself is elastic, it can continuously apply contraction force, which enables the flared opening to press the conductive contact to form a reliable elastic contact. This can compensate for the gap changes caused by wear or thermal expansion and contraction when the first conductive arm 200 and the second conductive arm 300 are in conductive contact, thus ensuring conductive stability.

[0040] Furthermore, the first conductive sheet includes two first bending plates 210, the ends of which are bent to form a first opening. The first opening faces the horizontal direction, and the first openings of the two first bending plates 210 are arranged opposite each other to form a flared horn shape.

[0041] Furthermore, each of the first bending plates 210 is provided with a plurality of first dividing slits 2113 at the position corresponding to the first opening. The first dividing slits 2113 extend in the horizontal direction and the plurality of first dividing slits 2113 are distributed in the vertical direction to divide the end of each of the first bending plates 210 into at least three first contact portions 211, with a gap between two adjacent first contact portions 211.

[0042] In this way, the three first contact portions 211 are independent of each other. Even if one of the first contact portions 211 becomes poorly connected due to wear, oxidation, or misalignment, the remaining first contact portions 211 can still conduct electricity. This avoids the problem of easy contact failure leading to overall circuit breakage in traditional single-contact structures, thus improving the operational reliability of the switch. At the same time, the first partition 2113 can form a heat dissipation channel, allowing the heat generated on the first conductive arm 200 and the second conductive arm 300 to dissipate in a timely manner, extending the service life of the first conductive arm 200 and the second conductive arm 300.

[0043] Furthermore, the elastic element includes two elastic sheets 212, each corresponding to one of the two first bending plates 210. The elastic sheets 212 extend horizontally, and each end of the elastic sheet 212 has an L-shaped hook with its opening facing the end of its corresponding first bending plate 210. This design is simple, easy to install, and provides good clamping effect on the first bending plate 210. The elastic sheets 212 are made of stainless steel.

[0044] Furthermore, the second conductive sheet includes two second bent plates 310, each with a second opening at its end. These second openings face horizontally, and are positioned opposite each other to form the conductive contact. The ends of the second bent plates 310 correspond one-to-one with the ends of the first bent plates 210 and are capable of conductive contact. This design ensures that the conductive contact of the second conductive sheet can smoothly enter the flared opening of the first conductive sheet and achieve stable conductive contact.

[0045] In this embodiment, three first contact portions 211 are provided. In other embodiments, four or more first contact portions 211 may be provided.

[0046] Both the first insulator 400 and the second insulator 500 are rotatably mounted on the base 100 via self-aligning bearings. A transmission rod 602 is provided between the first insulator 400 and the corresponding second insulator 500. The transmission rod 602 is manufactured using an integral molding process, and its length is not adjustable, thus preventing loosening over long-term use and improving the stability of opening and closing. The transmission rod 602 enables the first insulator 400 and the corresponding second insulator 500 to rotate synchronously and relative to each other by 90°, thereby achieving conductive contact between the first conductive arm 200 and the second conductive arm 300. A synchronizing rod 601 connects the three second insulators 500, enabling the three second insulators 500 to rotate synchronously in the same direction. A transmission box is provided at the bottom of the base 100, and a drive mechanism is provided in the transmission box. The drive shaft 603 of the drive mechanism is connected to one of the second insulators 500.

[0047] To facilitate the determination of the opening and closing stroke of the three-phase synchronous electric switch, an attitude sensor is installed on one of the first insulators 400 or the second insulator 500. The attitude sensor can directly measure its rotation angle and upload the position signal.

[0048] Alternatively, microswitches are installed in the transmission box corresponding to the open and closed positions of the drive shaft 603, and a moving contact is installed on the drive shaft 603. When the drive shaft 603 rotates to the open or closed position, the moving contact presses the stationary contact of the microswitch, quickly connecting the moving and stationary contacts and transmitting the position signal.

[0049] Alternatively, a magnet can be installed at the bottom of one of the first insulators 400 or the second insulator 500, and a magnetic induction component can be installed on the base 100. When the first insulator 400 or the second insulator 500 rotates to the closed position, the magnet moves closer to the magnetic induction component, triggering a signal; when the circuit is open, the magnet moves away from the magnetic induction component, and the signal is disconnected. The magnetic induction component transmits the open / closed position signal to the corresponding receiving device.

[0050] Furthermore, the first conductive arm 200 also includes two first mounting plates 213, which are located outside the two first bending plates 210 respectively. The elastic sheet 212 corresponds to the first mounting plate 213 and is fixedly mounted on the first mounting plate 213. A butterfly spring 702 is provided between the first bending plate 210 and the first mounting plate 213. The butterfly spring 702 is used to press the first bending plate 210.

[0051] The first insulator 400 is provided with a first mounting base 701, and a first fixed shaft is fixedly mounted on the first mounting base 701. The end of the first conductive arm 200 is slidably mounted on the first fixed shaft. Specifically, the ends of the two first bending plates 210 and the two first mounting plates 213 are bypassed by the first fixed shaft and are detachably fixedly connected by bolts.

[0052] The second conductive arm 300 further includes two second mounting plates 313, which are respectively located outside the two second bent plates 310. The second insulator 500 is provided with a second mounting base, and a second fixed shaft is fixedly mounted on the second mounting base. The end of the second conductive arm 300 is slidably mounted on the second fixed shaft. Specifically, the two second bent plates 310 and the two second mounting plates 313 are detachably fixed together by bolts, bypassing the second fixed shaft.

[0053] In other embodiments, the end of the first conductive arm 200 is welded and fixed to the first fixed shaft, and the end of the second conductive arm 300 is welded and fixed to the second fixed shaft. Based on the above embodiments, the usage principle and working process of this invention are as follows:

[0054] By controlling the drive mechanism, one of the second insulators 500 is rotated. The synchronizing rod 601 causes all three second insulators 500 to rotate synchronously in the same direction. The transmission rod 602 causes the corresponding first insulators 400 to rotate synchronously in opposite directions. As a result, the three first conductive arms 200 can make conductive contact with the three second conductive arms 300, allowing the conductive contacts of the second conductive plates to enter the flared openings of the first conductive plates. Because the elastic element itself is elastic, it can continuously apply a contraction force, which allows the flared openings to press the conductive contacts together to form a reliable elastic contact. This can compensate for the gap changes caused by wear or thermal expansion and contraction when the first conductive arm 200 and the second conductive arm 300 make conductive contact, ensuring conductive stability.

[0055] like Figures 6 to 10 As shown, a three-phase synchronous electric switch provided in the second embodiment of the present invention differs from that in the first embodiment in that: each of the second bending plates 310 is provided with a plurality of second dividing grooves at the position corresponding to the second opening. The second dividing grooves extend in the horizontal direction and are distributed in the vertical direction to divide the end of the second bending plate 310 into at least three second contact portions 311. Two adjacent second contact portions 311 are in contact with each other. The number of second contact portions 311 is less than the number of first contact portions 211. Each second contact portion 311 can correspond to and contact one first contact portion 211.

[0056] At least three second contact portions 311 are formed by the second dividing groove, making the three second contact portions 311 independent of each other. This avoids the easy failure of the traditional single contact structure, which can lead to an overall circuit break and improves the operational reliability of the switch. In this embodiment, there are six second contact portions 311 and seven first contact portions 211.

[0057] To further optimize contact performance, the structural design of the first contact portion 211 and the second contact portion 311 is as follows:

[0058] At least three first contact portions 211 are alternately divided into first contact pieces 2111 and second contact pieces 2112 from top to bottom. The second contact piece 2112 is bent to form a first protrusion 214, which is disposed facing the inside of the flared opening. The design of the first protrusion 214 makes it easier for the first contact portion 211 to contact the second conductive piece, thereby improving the conductivity stability.

[0059] Furthermore, each of the second contact portions 311 is bent to form a second protrusion 312, which is disposed towards the outer side of the flared opening. The second protrusion 312 can contact the first contact piece 2111 or the first protrusion 214 on the second contact piece 2112. Both the first protrusion 214 and the second protrusion 312 are arc-shaped. The design of the second protrusion 312 makes it easier for the second contact portion 311 to contact the first conductive piece, thereby improving the conductivity stability.

[0060] Furthermore, the elastic sheet 212 is provided with a plurality of clearance grooves 215, and the clearance grooves 215 correspond one-to-one with the second contact piece 2112. When the second protrusion 312 contacts the first protrusion 214 on the second contact piece 2112, the second contact piece 2112 can expand outward and enter the clearance groove 215.

[0061] When the second protrusion 312 contacts the first protrusion 214, the second protrusion 312 can push the second contact piece 2112, causing the second contact piece 2112 to enter the relief groove 215. The second protrusion 312 then enters between two adjacent first contact pieces 2111, allowing the second protrusion 312 to make conductive contact with the two adjacent first contact pieces 2111. This increases the overall conductive contact area between the first contact portion 211 and the second contact portion 311, improving the conductive stability of the first conductive arm 200 and the second conductive arm 300.

[0062] Based on the above embodiments, the usage principle and working process of the second embodiment of the present invention are as follows:

[0063] The difference from the first embodiment described above is that by adjusting the up and down position of the first conductive arm 200, the second contact portion 311 can make contact with the first contact portion 211 at different positions.

[0064] Specifically, the six second contact portions 311 can be made to correspond one-to-one with the six upper first contact portions 211 of the seven first contact portions 211 and make conductive contact. After a period of use, the six second contact portions 311 can be made to correspond one-to-one with the six lower first contact portions 211 of the seven first contact portions 211 and make conductive contact. This can prevent the first contact portions 211 and the second contact portions 311 from failing to reset due to elastic fatigue caused by the mutual pushing of the first protrusion 214 and the second protrusion 312 after long-term use, thus extending the service life of the first conductive sheet and the second conductive sheet, and in turn extending the service life of the three-phase synchronous switch.

[0065] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0066] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope defined in the appended claims.

Claims

1. A three-phase synchronous electric switch, characterized in that, include: The base is an integrally formed structure; three first insulators and three second insulators are rotatably mounted on the base, the axes of the first insulators and the second insulators both extend in the vertical direction, and the first insulators and the second insulators are arranged in a one-to-one correspondence; The first conductive arm, there are three first conductive arms, each of which is respectively disposed on each first insulator. The first conductive arm includes a first conductive sheet and an elastic sheet. The first conductive sheet extends in the horizontal direction and the end of the first conductive sheet forms a flared opening in the horizontal direction. The flared opening can contract in the horizontal direction. The second conductive arm, there are three second conductive arms, each of which is respectively disposed on each second insulator. The second conductive arm includes a second conductive sheet, each of which extends in the horizontal direction and has a conductive contact at its end. An elastic element is disposed on the first conductive sheet and corresponds to the position of the flared opening. The elastic element has a tendency to cause the flared opening of the first conductive sheet to contract. When the circuit is closed, the first conductive arm and the corresponding second conductive arm approach each other, and the conductive contacts of each second conductive piece can enter the flared opening of the corresponding first conductive piece. The elastic element allows the flared opening of the first conductive piece to press inward against the conductive contacts of the second conductive piece, thereby achieving conductive contact between the first and second conductive arms. The first conductive piece includes two first bent plates, and the ends of the two first bent plates are bent to form first openings. The first openings face horizontally, and the first openings of the two first bent plates are arranged opposite each other to form flared openings. Each first bent plate has multiple first dividing slits at the position corresponding to the first opening. The first dividing slits extend horizontally, and the multiple first dividing slits are distributed vertically to divide the ends of each first bent plate into at least three first contact portions. There is a gap between two adjacent first contact portions. The elastic element includes two elastic sheets, and the two elastic sheets respectively... The device comprises two first bending plates, an elastic sheet extending horizontally, and an L-shaped hook at the end of the elastic sheet. The opening of the L-shaped hook faces the end of its corresponding first bending plate. The second conductive sheet comprises two second bending plates, each with a second opening at its end, the second opening facing horizontally. The second openings of the two second bending plates are arranged opposite each other to form the conductive contact. The ends of the second bending plates correspond one-to-one with the ends of the first bending plates and can make conductive contact. Each second bending plate has a plurality of second dividing grooves at the position corresponding to the second opening. The second dividing grooves extend horizontally and are distributed vertically to divide the end of the second bending plate into at least three second contact portions. Two adjacent second contact portions are in contact with each other. The number of second contact portions is less than the number of first contact portions. Each second contact portion can correspond to and contact one first contact portion.

2. The three-phase synchronous electric switch according to claim 1, characterized in that, At least three first contact portions are alternately divided into first contact pieces and second contact pieces from top to bottom. The second contact piece is bent to form a first protrusion, which is disposed facing the inside of the flared opening.

3. The three-phase synchronous electric switch according to claim 2, characterized in that, Each of the second contact portions is bent to form a second protrusion, which is disposed facing the outside of the flared opening. The second protrusion can contact the first contact piece or the first protrusion on the second contact piece.

4. The three-phase synchronous electric switch according to claim 3, characterized in that, The elastic sheet is provided with a plurality of clearance grooves, each of which corresponds to a second contact piece. When the second protrusion contacts the first protrusion on the second contact piece, the second contact piece can expand outward and enter the clearance groove.

5. The three-phase synchronous electric switch according to claim 1, characterized in that, The first conductive arm also includes two first mounting plates, which are located outside the two first bending plates respectively. The elastic sheet corresponds to the first mounting plate and is fixedly mounted on the first mounting plate. A butterfly spring is provided between the first bending plate and the first mounting plate, and the butterfly spring is used to press the first bending plate.

Images