Contact type high-voltage ac relay structure

Abstract

The application discloses a contact type high-voltage AC relay structure, which comprises a side plate, a metal main body connected with the side plate, a pole and a micro switch, an electromagnet connected with the metal main body and a linkage assembly connected with an armature of the electromagnet; the pole is arranged above the linkage assembly; the armature drives the linkage assembly to move up and down by energization or de-energization of a magnetic coil of the electromagnet, so that the pole is contacted or separated; the linkage assembly is synchronously contacted with the micro switch during the up and down movement, and is used for feeding back whether the linkage assembly is physically contacted with the pole through the micro switch; a main spring is arranged between the linkage assembly and the metal main body, and is used for driving the armature and the linkage assembly to automatically reset after the magnetic coil is de-energized. The application has the advantages of low cost, compact structure, high stability, realization of contact position feedback during attraction process and elimination of arc phenomenon generated in a high-voltage electric strong magnetic environment.

Description

Technical Field

[0001] This invention relates to a high-voltage relay, and more particularly to a contact-type high-voltage AC relay structure. Background Technology

[0002] Contact-type high-voltage relays are used to connect and disconnect large currents, mainly for driving power equipment such as motors. Existing contact-type high-voltage relays are primarily imported, and typically suffer from the following drawbacks: (1) they are susceptible to technological blockade, resulting in high product prices and a lack of feedback on connection and disconnection signals; (2) the base is prone to breakage under strong impact; (3) arcing is likely to occur in strong magnetic fields; and (4) the main spring rotates during the engagement process, affecting structural stability. Therefore, this invention urgently needs to design a novel contact-type high-voltage AC relay structure to solve the aforementioned technical problems. Summary of the Invention

[0003] The purpose of this invention is to overcome the above-mentioned shortcomings of the prior art and provide a contact-type high-voltage AC relay structure that is low in cost, compact in structure, highly stable, and highly safe.

[0004] The technical solution of this invention is: a contact-type high-voltage AC relay structure, including a side plate, a metal body connected to the side plate, a pole post and a micro switch, an electromagnet connected to the metal body, and a linkage assembly connected to the armature of the electromagnet; the pole post is provided above the linkage assembly, and the armature drives the linkage assembly to move up and down by energizing or de-energizing the electromagnetic coil of the electromagnet, making contact or separation with the pole post; the linkage assembly also makes synchronous contact with the micro switch when moving up and down, which is used to provide feedback on whether the linkage assembly and the pole post are in physical contact; a main spring is provided between the linkage assembly and the metal body, which is used to automatically reset the armature and the linkage assembly after the electromagnetic coil is de-energized.

[0005] Furthermore, the metal body includes a metal base, a grounding metal plate, and a metal clip. The horizontal plane of the metal clip is parallel to the upper surface of the yoke of the electromagnet. The metal clip is also fastened to the isolation component. By connecting the grounding components and isolating them, arcing phenomena generated in the high-voltage electric and strong magnetic environment are prevented.

[0006] Furthermore, a buffer pad is provided between the metal base and the grounding metal sheet, and the metal base, buffer pad, grounding metal sheet and electromagnet base are threadedly connected, and the metal base is electrically connected to the electromagnet through the grounding metal sheet; the metal base, side plate, metal bracket and electromagnet side surface are threadedly connected; thus, a stable support structure is formed between the metal base, side plate, metal bracket and electromagnet.

[0007] Furthermore, both the metal base and the metal tray are L-shaped structures, and the grounding metal plate is U-shaped. The horizontal surface of the metal base is threadedly connected to the buffer pad, the grounding metal plate, and the base of the electromagnet. The vertical surface of the metal base is threadedly connected to the side plate, the vertical surface of the metal tray, and the side surface of the electromagnet. The horizontal surface of the metal tray is used to connect the isolation component and to limit the main spring.

[0008] Furthermore, the linkage assembly includes an insulator, a contact disc, and a metal pressure plate. The contact disc is fixedly connected to the upper part of the insulator, and a small spring is provided between the two. The lower part of the insulator extends into the metal pressure plate and is integrated with the metal pressure plate and the armature of the electromagnet.

[0009] Furthermore, the metal pressure plate includes a plate body and a boss extending horizontally along one side of the plate body. Two spaced-apart limiting blocks extend downward from the bottom surface of the plate body. The limiting blocks are provided with connecting holes. The lower part of the insulator passes through the central hole of the plate body of the metal pressure plate and extends to the inner wall between the two limiting blocks, with the holes aligned. The upper part of the armature of the electromagnet is located between the outer surfaces of the two limiting blocks of the metal pressure plate, with the holes aligned, so that the upper part of the armature, the limiting blocks of the metal pressure plate, and the lower part of the insulator are connected as a whole by bolt assembly.

[0010] Furthermore, a U-shaped groove is provided on the upper part of the side plate, and two microswitches are symmetrically arranged on the back of the side plate. The protrusion of the metal pressure plate extends to the back of the side plate through the U-shaped groove. When the electromagnet drives the metal pressure plate to move up and down, the metal pressure plate will press against or disengage from the moving contacts of the two microswitches.

[0011] Furthermore, the main spring is sleeved around the upper part of the armature of the electromagnet, and the main spring is located between the metal pressure plate and the metal bracket and limits its movement. The main spring is provided with an anti-rotation part.

[0012] Furthermore, the horizontal surface of the metal clip is an arc-shaped structure, with a bending hole extending from the horizontal surface to the upper part of the vertical surface to form a bending structure. Multiple protrusions are provided around the bending hole on the horizontal surface, and a limiting groove for limiting the main spring is provided between the sidewall of the horizontal surface and the protrusions. The armature of the electromagnet passes through the bending hole of the metal clip and the center of the main spring, and is held in place by the protrusions of the metal clip. The anti-rotation part of the main spring has a structure that bends along the end of the main spring. At least one protrusion on the horizontal surface of the metal clip has an anti-rotation groove that matches the shape of the anti-rotation part. When the main spring is engaged in the limiting groove of the metal clip, the anti-rotation part is precisely engaged in the anti-rotation groove of the protrusion.

[0013] Furthermore, the armature, metal pressure plate, main spring, metal bracket, electromagnet yoke, grounding metal plate, and metal base of the electromagnet are metallically grounded to ensure that the surface potentials of each metal component are equal. A terminal block fixing component and a terminal block are provided below the micro switch. The terminal block fixing component is fixed to the back of the side plate, and the terminal block is fixed to the terminal block fixing component. The feedback line of the micro switch is clipped into the wire groove of the terminal block fixing component, and the feedback line terminal of the micro switch and the power supply terminal of the electromagnet are fixed to the terminal block.

[0014] The beneficial effects of this invention are: (1) By adopting domestically produced materials, components and production processes, the problem of high selling price and cost can be solved, saving at least 50%-70% of the procurement cost compared with foreign products; (2) By switching the electromagnet coil on and off, the armature can be attracted and moved up and down in the electromagnet coil, thereby driving the metal pressure plate and the contact disc to move up and down, and then being reset by the main spring; and by the metal pressure plate contacting the left and right micro switches, the contact position feedback during the attraction process can be realized, so that the relay can obtain a reliable contact feedback signal. (3) The structure adopts a stable triangular support structure, which can withstand higher impact forces at the stress nodes of the structure and maintain structural stability even under high impact stress alternation. (4) By combining metal grounding with local isolation structure, the problem of arcing caused by strong magnetic environment is solved and the arcing phenomenon that is easy to occur in high voltage strong magnetic environment is eliminated. (5) By setting up a main spring anti-rotation structure, the problem of spring rotation caused by vibration during the engagement process is solved; (6) The structure of the metal pressure plate restricts the armature assembly from circumferentially deflecting beyond the pressing stroke with the micro switch when it moves up and down, thereby ensuring reliable contact between the metal pressure plate and the micro switch, limiting the back and forth swing of the metal pressure plate, and ensuring reliable contact between the contact disc and the pole. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural schematic diagram of an embodiment of the present invention; Figure 2 yes Figure 1 A schematic diagram of the rear structure of the embodiment shown; Figure 3 yes Figure 1 A front view of the embodiment shown; Figure 4 yes Figure 1 An exploded view of the embodiment shown; Figure 5 yes Figure 1 The schematic diagram of the metal body in the embodiment shown is as follows; Figure 6 yes Figure 1 The diagram shows the structure of the electromagnet in the embodiment shown. Figure 7 yes Figure 1 The diagram shows the structure of the plastic separator in the embodiment shown. Figure 8 yes Figure 1 The diagram shows the connection structure of the linkage components in the embodiment shown. Figure 9 yes Figure 1 The diagram shows the structural schematic of the insulator in the embodiment shown. Figure 10 yes Figure 1 The diagram shows the structure of the metal pressure plate in the embodiment shown. Figure 11 yes Figure 10 A schematic diagram of the bottom structure of the metal pressure plate in the embodiment shown; Figure 12 yes Figure 1 The schematic diagram of the main spring in the embodiment shown is shown. Figure 13 yes Figure 1 The schematic diagram of the metal card holder in the embodiment shown is as follows; Figure 14 yes Figure 1 The diagram shows the structure of the micro switch in the embodiment shown.

[0016] Explanation of reference numerals in the attached diagram: 1. Side plate; 2. Pole post; 3. Micro switch; 4. Electromagnet (yoke part, including electromagnetic coil); 5. Main spring; 6. Metal base; 7. Grounding metal plate; 8. Metal bracket; 9. Rubber buffer pad; 10. Plastic isolation component; 11. Insulator; 12. Contact disc; 13. Metal pressure plate; 14. Small spring; 15. Washer; 16. Terminal block fixing component; 17. Terminal block; 21. Terminal post washer; 22. Terminal post spring washer; 23. Double nut; 31. Moving contact; 32. Fixed contact; 41. Armature; 51. Anti-rotation part; 81. Protrusion; 82. Bending hole; 83. Protrusion; 84. Second limit groove; 101. Support platform; 102. Arc groove; 103. Engaging groove; 111. First limiting groove; 131. Disc body; 132. Boss; 133. Limiting block; 134. Third limiting groove; 831. Anti-rotation groove. Detailed Implementation

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] like Figures 1-5The diagram shows a contact-type high-voltage AC relay structure, comprising a side plate 1, a metal body connected to the side plate 1, a pole post 2, a micro switch 3, an electromagnet 4 connected to the metal body, and a linkage assembly connected to the armature 41 of the electromagnet. The pole post 2 is located above the linkage assembly. When the electromagnetic coil of the electromagnet 4 is energized or de-energized, the armature 41 drives the linkage assembly to move up and down, making contact with or separating from the pole post 2. During the up-and-down movement, the linkage assembly also synchronously contacts the micro switch 3, providing feedback on whether the linkage assembly and the pole post 2 are in physical contact. A main spring 5 is provided between the linkage assembly and the metal body, which automatically resets the armature 41 and the linkage assembly after the electromagnetic coil is de-energized.

[0019] In this embodiment, the metal body includes a metal base 6, a grounding metal sheet 7, and a metal card holder 8, with a rubber buffer pad 9 provided between the metal base and the grounding metal sheet.

[0020] Specifically, four screws pass through the bottom holes of the metal base 6, rubber buffer pad 9, grounding metal plate 7, and electromagnet 4, and are secured on the reverse side by nuts. The grounding metal plate 7 has a U-shaped cross-section, and one corner of the rubber buffer pad 9 extends into the U-shaped cavity of the grounding metal plate 7, with the holes aligned to allow the screws to pass through. This ensures that the upper surface of the grounding metal plate 7 contacts the base of the electromagnet 4, and the lower surface contacts the metal base 6. The length and width of the metal base 6 are both greater than the dimensions of the rubber buffer pad 9. Threaded holes are provided at all locations except for the connection to the rubber buffer pad, allowing for secure connection to other platforms or equipment. In this embodiment, by incorporating the rubber buffer pad, the relay as a whole can effectively absorb the energy from vibration and impact in a strong external environment.

[0021] like Figure 6 As shown: The yoke of the electromagnet is used to enhance the attraction force of the electromagnetic coil and improve the efficiency of the electromagnet. The armature 41 is located at the center of the electromagnetic coil. The yoke and the armature form a closed magnetic circuit, which encloses the magnetic lines of force generated by the electromagnetic coil inside, so that the magnetic energy can be fully utilized and the efficiency of the electromagnet can reach the maximum.

[0022] In this embodiment, the metal base 6 is L-shaped, with two blocks between its vertical and horizontal surfaces. The side plate 1 is positioned between these blocks for quick positioning. A metal bracket 8, also L-shaped, is located on the front of the side plate 1. Part of the screws pass through the vertical surface of the side plate 1, the metal bracket 8, and the lateral hole of the electromagnet 4, and are secured by nuts on the reverse side. The other part of the screws pass through the vertical surface of the metal base 6, the side plate 1, the metal bracket 8, and the lateral hole of the electromagnet 4, and are secured by nuts on the reverse side. Thus, the metal base 6, side plate 1, metal bracket 8, and electromagnet 4 form a triangular, stable connection and support structure, effectively securing the electromagnet 4. Compared to foreign cantilever beam structures, this structure can withstand higher impact forces at structural stress points and maintain structural stability even under alternating high impact stress conditions.

[0023] like Figure 7 As shown: In this embodiment, the metal card holder 8 is also snapped together with the plastic spacer 10. That is, the plastic spacer 10 and the metal card holder 8 are adapted to each other and are both arc-shaped structures. The bottom of the plastic spacer 10 is provided with a support platform 101 with an opening. The support platform is surrounded by side walls. A stepped arc-shaped groove 102 is opened between the side walls and the support platform. The two sides of the arc-shaped groove 102 are further provided with engagement grooves 103. The outer wall of the metal card holder 8 is provided with a protrusion 81. The arc-shaped part of the metal card holder 8 is inserted into the arc-shaped groove 102 of the plastic spacer 10 and supported by the support platform 101. The protrusion 81 of the metal card holder is embedded in the engagement groove 103 for snapping and fixing.

[0024] like Figure 4 and Figure 8 As shown: In this embodiment, the linkage component includes an insulator 11, a contact disc 12 and a metal pressure plate 13. The contact disc 12 is fixedly connected to the upper part of the insulator 11, and a small spring 14 is provided between the two. The lower part of the insulator 11 extends into the metal pressure plate 13 and is integrated with the metal pressure plate 13 and the armature 31 of the electromagnet.

[0025] Specifically, such as Figure 9As shown: the insulator 11 is designed in a stepped shape, specifically comprising multiple cylinders with diameters decreasing sequentially from bottom to top, forming a studded stepped structure. The largest cylinder has a first limiting groove 111 inside. For example, in this embodiment, the insulator 11 includes a first cylinder 1#, a second cylinder 2#, a third cylinder 3#, and a fourth cylinder 4# with diameters decreasing sequentially. The first limiting groove 111 is provided between the first cylinder 1# and the second cylinder 2#. A small spring 14 is provided between the contact disc and the insulator, with the bottom of the small spring 14 placed in the first limiting groove 111. The center hole of the contact disc 12 passes through the studded step of the insulator 11 and is placed at the step between the second and third cylinders. The center hole of the washer 15 passes through the studded step of the insulator 11 and is placed at the step between the third and fourth cylinders, and is then fixed by a nut. The lower part of the insulator 11 is also provided with a perforated cylinder, that is, a fifth cylinder 5# with a hole extends from the lower end of the first cylinder. The fifth cylinder 5# passes through the hole of the metal pressure plate 13 and stops rotation through the tangential surface.

[0026] like Figure 10 and Figure 11 As shown: The metal pressure plate 13 includes a plate body 131 and a boss 132 extending horizontally along one side of the plate body. Two spaced-apart limiting blocks 133 extend downward from the bottom surface of the plate body. The limiting blocks 133 are provided with connecting holes. The fifth cylinder 5# passes through the center hole of the metal pressure plate and extends to the inner wall between the two limiting blocks 133. The hole on the fifth cylinder 5# is aligned with the connecting hole of the limiting block 133. The upper part of the armature 41 of the electromagnet is stuck between the outer surfaces of the two limiting blocks 133 of the metal pressure plate. The upper hole of the armature 41 is aligned with the connecting hole of the limiting block 133. The bolt passes through the upper hole of one side wall of the armature 41, the connecting hole of the limiting block of the metal pressure plate, and the hole of the fifth cylinder of the insulator. It extends out from the upper hole of the other side wall of the armature 41 and is fixed by a nut.

[0027] The function of the above-mentioned linkage components is to enable the armature to move up and down through the magnetic induction of the electromagnetic coil in the yoke of the electromagnet, thereby driving the metal pressure plate, insulator, contact disc, small spring and other parts connected to the armature to move up and down synchronously.

[0028] This embodiment effectively prevents arcing in strong magnetic environments by combining grounded metal components with a local isolation structure. Specifically, due to the strong external magnetic environment, the electromagnet's attraction plane is parallel to the upper plane of the metal tray, causing magnetic induction on the upper plane of the metal tray, which easily leads to arcing. By grounding the metal components and using a plastic isolator to connect the arcing-prone parts to the metal tray, a snap-fit ​​connection is achieved. The metal components include the armature 41, metal pressure plate 13, main spring 5, metal tray 8, electromagnet yoke, grounding metal plate 7, and metal base 6. The metal components are grounded in this order to ensure equal surface potential. Local isolation involves attaching a plastic isolator 10 to the metal tray 8. Since the metal tray 8 is parallel to the upper surface of the electromagnet yoke, the electromagnetic effect of the electromagnet yoke during operation causes internal charge changes in the metal tray. In a strong magnetic environment, this can easily lead to electric sparks at the metal edges. The plastic isolator isolates these sparks, preventing arcing in strong magnetic environments.

[0029] like Figure 12 and Figure 13 As shown: In this embodiment, a main spring 5 is sleeved around the upper part of the armature of the electromagnet, and the main spring 5 is located between the metal pressure plate 13 and the metal clip 8 and is limited, and the main spring 5 is provided with an anti-rotation part 51.

[0030] Specifically, the horizontal surface of the metal clip 8 is arc-shaped and has a certain thickness. A bending hole 82 is formed on the horizontal surface, extending from the horizontal surface to the upper part of the vertical surface, forming a bending structure. Multiple protrusions 83 are provided around the bending hole on the horizontal surface. A second limiting groove 84 is formed between the sidewall of the horizontal surface and the protrusions 83. The armature 41 passes through the bending hole 82 of the metal clip 82 and the center of the main spring 5, and is held in place by the protrusions 83 of the metal clip 82. The metal pressure plate 13 also has a third limiting groove 134 on its bottom surface. The bottom of the main spring 5 is held in the second limiting groove 84 of the metal clip 84, and the top of the main spring is held in the third limiting groove 134 of the metal pressure plate.

[0031] The anti-rotation part 51 of the main spring 5 is a structure that is bent along the end of the main spring, for example, bent at 90°. At least one protrusion 83 on the horizontal surface of the metal retainer has an anti-rotation groove 831 that matches the shape of the anti-rotation part 51. When the main spring 5 is engaged in the second limiting groove 84 of the metal retainer 8, the anti-rotation part 51 fits perfectly into the anti-rotation groove 831 of the protrusion. In other words, the main spring 5's front-to-back, left-to-right, and up-down freedom is restricted by the metal pressure plate 13 and the limiting groove of the metal retainer 8, and the addition of the anti-rotation part 51 at the end for limiting and preventing rotation solves the problem of rotation caused by vibration during the engagement process of the main spring, and also reliably prevents the main spring from collapsing.

[0032] In this embodiment, the stud portion of the pole post 2 passes through the upper part of the side plate 1 and is threadedly connected to the side plate 1. The contact disk 12 is located below the pole post 2. The contact disk 12 moves upward under the drive of the armature 41 to contact the pole post 2 and generate a large current.

[0033] Specifically, this embodiment has two pole posts 2, and the surface of the contact disc 12 can simultaneously contact both pole posts when moving upward. A U-shaped groove is provided in the middle of the upper part of the side plate 1, which divides the upper part of the side plate 1 into two halves, each of which is connected to the stud portion of the corresponding pole post 2. That is, the stud portion of the pole post 2 passes through the hole above the side plate 1, the pole post washer 21, and the pole post spring washer 22, and is then threadedly connected to the double nuts 23. Among them, the nut closer to the side plate in the double nuts 23 is the pole post fixing nut, which is used to fix the pole post to the side plate; the nut farther away from the side plate is the pole post external terminal fixing nut, which is used to fix the external terminal cable of the pole post between the double nuts.

[0034] The aforementioned small spring 14 is used to enable the contact disc 12 to buffer and reliably contact the two pole posts 2; the insulator 11 is used to connect a large current when the contact disc contacts the pole post, but the large current will cause interference and conduction to the electromagnet. The insulator can isolate the large current and can simultaneously connect the contact disc 12, the micro switch 3 and the metal pressure plate 13.

[0035] like Figure 2 and Figure 14 As shown: In this embodiment, the micro switch 3 is located on the back of the side plate 1. Preferably, two micro switches 3 are provided and symmetrically arranged, that is, the moving contacts 31 are arranged opposite each other. The boss 132 of the metal pressure plate extends along the lower part of the U-shaped groove of the side plate 1 to the back of the side plate. There is a gap between the moving contacts 31 of the two micro switches 3. This gap satisfies the following conditions: when the electromagnet 4 is energized and drives the metal pressure plate 13 to move downward, the metal pressure plate 13 will press against the moving contact 31 of the micro switch, causing the moving contact 31 to move towards the fixed contact 32 of the micro switch to achieve rapid connection; after the electromagnet 4 is de-energized and drives the metal pressure plate to move upward, the metal pressure plate moves away from the micro switch to achieve rapid disconnection between the moving contact and the fixed contact. It can be said that the boss part of the metal pressure plate 13 can squeeze or release the micro switch when moving up and down, thereby obtaining a physical contact signal of the contact disc, and then providing feedback on whether a large current can be switched on or off.

[0036] In addition, the limiting block 133 below the aforementioned metal pressure plate 13 can solve the problem that the metal pressure plate swings too much back and forth during the up and down movement of the metal pressure plate due to the large gap between the metal pressure plate and the elongated hole of the side plate. That is, the metal pressure plate is prone to circumferential deflection exceeding the pressing stroke with the micro switch. The limiting block can ensure reliable contact between the metal pressure plate and the micro switch, limit the back and forth swing of the metal pressure plate, and at the same time ensure reliable contact between the contact disc and the pole.

[0037] In this embodiment, a terminal block fixing member 16 and a terminal block 17 are provided below the micro switch 3. The terminal block fixing member 16 is fixed to the back of the side plate 1, and the terminal block 17 is fixed to the terminal block fixing member 16. The feedback line of the micro switch 3 is clipped in the wire groove of the terminal block fixing member 16, and the feedback line terminal of the micro switch 3 and the power supply terminal of the electromagnet 4 are fixed to the terminal block 17.

[0038] The working principle of this embodiment is as follows: When the electromagnet's coil is energized, generating an attractive force, the armature drives the metal pressure plate and contact disc downwards. The main spring compresses, disengaging the contact disc from the pole and de-energizing it. Once the engagement is complete, the metal pressure plate presses against the microswitch, sending a feedback signal to the relay indicating physical disconnection. When the electromagnet is de-energized, the attractive force disappears, and the armature, released by the main spring, drives the metal pressure plate and contact disc upwards. The contact disc then contacts the pole, and the metal pressure plate moves away from the microswitch. The microswitch then sends a feedback signal indicating physical contact between the contact disc and the pole. This provides reliable feedback on whether the contact disc and pole are in physical contact, enabling high-current on / off control.

[0039] In summary, the present invention has the following advantages: (1) By combining the grounding of metal parts with the local isolation structure, the problem of arcing caused by strong magnetic environment is solved and the arcing phenomenon that is easy to be generated in high voltage strong magnetic environment is eliminated; (2) By switching the electromagnet coil on and off, the armature can be attracted and moved up and down in the electromagnetic coil, thereby driving the metal pressure plate and the contact disc to move up and down, and reset by the main spring; and by the contact between the metal pressure plate and the micro switch, the physical contact signal between the contact disc and the pole can be realized during the attraction process, so that the relay can obtain a reliable contact feedback signal; (3) By setting the main spring anti-rotation structure, the problems of collapse and rotation of ordinary circular springs are reliably limited; (4) The structure of the metal pressure plate limits the armature assembly to deflect circumferentially beyond the pressing stroke with the micro switch when it moves up and down, thereby ensuring reliable contact between the metal pressure plate and the micro switch, limiting the back and forth swing of the metal pressure plate, and ensuring reliable contact between the contact disc and the pole.

Claims

1. A contact-type high-voltage AC relay structure, characterized in that, The device includes a side plate, a metal body connected to the side plate, a pole post, and a micro switch, an electromagnet connected to the metal body, and a linkage assembly connected to the armature of the electromagnet. The pole post is located above the linkage assembly. When the electromagnet's coil is energized or de-energized, the armature drives the linkage assembly to move up and down, contacting or separating from the pole post. During its up-and-down movement, the linkage assembly also synchronously contacts the micro switch, providing feedback on whether the linkage assembly and the pole post are in physical contact. A main spring is located between the linkage assembly and the metal body, which automatically resets the armature and linkage assembly after the electromagnet's coil is de-energized. The metal body includes a metal base, a grounding metal plate, and a metal clip. The horizontal plane of the metal clip is parallel to the upper surface of the yoke of the electromagnet. The metal clip is also fixed with the isolation component. By connecting the grounding to each metal component and isolating with the isolation component, the arcing phenomenon generated in the high voltage electric and strong magnetic environment is eliminated. The linkage assembly includes an insulator, a contact disc, and a metal pressure plate. The contact disc is fixedly connected to the upper part of the insulator, and a small spring is provided between the two. The lower part of the insulator extends into the metal pressure plate and is integrated with the metal pressure plate and the armature of the electromagnet. The metal pressure plate includes a plate body and a boss extending horizontally along one side of the plate body. Two spaced-apart limiting blocks extend downward from the bottom surface of the plate body. The limiting blocks are provided with connecting holes. The lower part of the insulator passes through the central hole of the metal pressure plate and extends to the inner wall between the two limiting blocks, and the hole at the lower part of the insulator is aligned with the connecting hole. The upper part of the armature of the electromagnet is located between the outer surfaces of the two limiting blocks of the metal pressure plate, and the hole at the upper part of the armature is aligned with the connecting hole, so that the upper part of the armature, the limiting blocks of the metal pressure plate, and the lower part of the insulator are connected as a whole by bolt assembly.

2. The contact-type high-voltage AC relay structure according to claim 1, characterized in that, A buffer pad is provided between the metal base and the grounding metal sheet. The metal base, buffer pad, grounding metal sheet and electromagnet base are threaded together, and the metal base is electrically connected to the electromagnet through the grounding metal sheet. The metal base, side plate, metal bracket and electromagnet side surface are threaded together. Thus, a stable support structure is formed between the metal base, side plate, metal bracket and electromagnet.

3. The contact-type high-voltage AC relay structure according to claim 1, characterized in that, Both the metal base and the metal tray are L-shaped structures, and the grounding metal plate is U-shaped. The horizontal surface of the metal base is threadedly connected to the buffer pad, the grounding metal plate, and the base of the electromagnet. The vertical surface of the metal base is threadedly connected to the side plate, the vertical surface of the metal tray, and the side surface of the electromagnet. The horizontal surface of the metal tray is used to connect the isolation component and to limit the main spring.

4. The contact-type high-voltage AC relay structure according to claim 1, characterized in that, The upper part of the side plate has a U-shaped groove, and there are two microswitches, which are symmetrically arranged on the back of the side plate. The boss of the metal pressure plate extends to the back of the side plate through the U-shaped groove. When the electromagnet drives the metal pressure plate to move up and down, the metal pressure plate will press against or disengage from the moving contacts of the two microswitches.

5. The contact-type high-voltage AC relay structure according to claim 1, characterized in that, The main spring is sleeved around the upper part of the armature of the electromagnet, and the main spring is located between the metal pressure plate and the metal bracket and limits its movement. The main spring is provided with an anti-rotation part.

6. The contact-type high-voltage AC relay structure according to claim 5, characterized in that, The horizontal surface of the metal clip is arc-shaped, with a bending hole extending from the horizontal surface to the upper part of the vertical surface, forming a bending structure. Multiple protrusions are provided around the bending hole on the horizontal surface. A limiting groove for limiting the main spring is provided between the sidewall of the horizontal surface and the protrusions. The armature of the electromagnet passes through the bending hole of the metal clip and the center of the main spring, and is held in place by the protrusions of the metal clip. The anti-rotation part of the main spring is a structure that bends along the end of the main spring. At least one protrusion on the horizontal surface of the metal clip has an anti-rotation groove that matches the shape of the anti-rotation part. When the main spring is engaged in the limiting groove of the metal clip, the anti-rotation part is precisely engaged in the anti-rotation groove of the protrusion.

7. The contact-type high-voltage AC relay structure according to claim 1, characterized in that, The armature, metal pressure plate, main spring, metal bracket, electromagnet yoke, grounding metal plate, and metal base of the electromagnet are metallically grounded to ensure that the surface potential of each metal component is equal. A terminal block fixing component and a terminal block are provided below the micro switch. The terminal block fixing component is fixed to the back of the side plate, and the terminal block is fixed to the terminal block fixing component. The feedback line of the micro switch is clipped in the wire groove of the terminal block fixing component, and the feedback line terminal of the micro switch and the power supply terminal of the electromagnet are fixed to the terminal block.

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