Anti-interference solid-state relay

Abstract

The invention relates to the technical field of solid-state relays, in particular to an anti-interference solid-state relay which comprises a solid-state relay body, heat dissipation holes are formed in the two ends of the middle of the end face of one side of the solid-state relay body, and heat dissipation cylinders are fixedly connected to the positions, located at the heat dissipation holes, of the inner wall of the solid-state relay body. A heat dissipation structure is arranged in the heat dissipation barrel, the heat dissipation structure is used for cooling the interior of the solid-state relay body, an expansion assembly is arranged in the middle of the inner bottom surface of the solid-state relay body, and the expansion assembly is used for triggering the heat dissipation structure to work. Connecting grooves are formed in the four corners of the upper end of the solid-state relay body, fixing bolts and conducting strips are arranged in the connecting grooves, and the connecting assembly comprises the fixing bolts and the conducting strips. Compared with the prior art, the problems that in the prior art, a heat dissipation structure triggering mode is not suitable for a strong magnetic environment, and an electric connection mode has potential safety hazards are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of solid-state relays, and in particular to an anti-interference solid-state relay. Background Art

[0002] Solid-state relay is a new type of contactless switching device composed entirely of solid-state electronic components. Solid-state relay uses the switching characteristics of electronic components (such as switching transistors, bidirectional thyristors and other semiconductor devices) to connect and disconnect circuits without contact or sparks. It is mainly composed of three parts: input circuit, isolation (coupling) circuit and output circuit. When the input circuit is added with a control signal, it is amplified and converted by the isolation circuit and the drive circuit, and finally drives the semiconductor device in the output circuit to realize the switching action.

[0003] In actual use, solid-state relays generate a certain amount of heat due to the internal electronic components during operation. When this heat gathers together, it will increase the temperature inside the solid-state relay, causing certain interference to the reaction speed of the internal electronic components. Therefore, most existing solid-state relays are equipped with a heat dissipation structure to achieve rapid heat dissipation inside the solid-state relay.

[0004] In the prior art, a Chinese patent document with publication number CN118942961A proposes a well-sealed solid-state relay, including a relay cover and a relay housing, wherein a mounting device is arranged inside the relay housing, detection devices are arranged on both sides of the interior of the relay housing, and an internal heat dissipation device is arranged on the inner back of the relay housing. Although the solid-state relay is provided with a detection device, the internal detection sensor is a temperature sensor, a humidity sensor and a current / voltage monitoring sensor, which are integrated and installed on the side of the inner mounting seat through a first connecting cable, and the working state of the relay is monitored in real time through a microcontroller. Once an abnormality is found, such as over-temperature, the relay is automatically turned on and off. If the temperature is too high, the humidity exceeds the standard, or the current is overloaded, the signal will be immediately transmitted to the buzzer located on the connection box through the second connection cable to start the alarm mechanism to remind the staff and ensure the safe operation of the relay. However, the technology is consistent with the traditional method in that the solid-state relay is prone to damage or malfunction in a strong electromagnetic interference environment. The temperature sensor, as a temperature detection element, will be affected by electromagnetic interference, resulting in inaccurate or ineffective temperature detection, which will cause the heat dissipation structure to not be triggered for heat dissipation. Therefore, the solid-state relay is not suitable for use in a strong electromagnetic interference environment. In addition, the bolt connection method commonly used in traditional solid-state relays also exposes some problems during the power connection process. Manually rotating the bolt to ensure that the power connection piece is in close contact with the connecting wire is not only cumbersome, but in actual operation, the bolt is easily loosened due to vibration or improper maintenance, which will cause the wire to fall off. On the other hand, if the bolt is tightened too much, it may cause the wire to be squeezed out from between the bolt and the power connection piece due to excessive squeezing. The exposed wire not only affects the normal operation of the equipment, but also may constitute a serious safety hazard.

[0005] Furthermore, we disclose an anti-interference solid-state relay to meet the actual needs that the heat dissipation structure triggering method in the prior art is not suitable for strong magnetic environment and the electrical connection method has safety hazards. Summary of the invention

[0006] In view of this, the purpose of the present invention is to provide an anti-interference solid-state relay to solve the problems in the prior art that the heat dissipation structure triggering method is not suitable for strong magnetic environment and the electrical connection method has safety hazards.

[0007] Based on the above purpose, the present invention provides an anti-interference solid-state relay, including a solid-state relay body, wherein heat dissipation holes are provided at both ends of the middle part of one end surface of the solid-state relay body, the inner wall of the solid-state relay body is located, and a heat dissipation tube is fixedly connected to the position of the heat dissipation hole, and a heat dissipation structure is arranged inside the heat dissipation tube, and the heat dissipation structure is used to complete the cooling work inside the solid-state relay body, and an expansion component is arranged in the middle of the inner bottom surface of the solid-state relay body, and the expansion component is used to trigger the heat dissipation structure to work, and connecting grooves are provided at the four corners of the upper end of the solid-state relay body, and a fixing bolt and a conductive sheet are arranged inside the connecting groove, and a connecting component is arranged between the fixing bolt and the conductive sheet, and the connecting component is used to prevent the wire from falling off from the fixing bolt and being squeezed out from between the fixing bolt and the conductive sheet, and two resistance components are arranged on both sides of the lower end surface of the solid-state relay body, and the resistance component includes two first spring seats fixedly connected to the lower end surface of the solid-state relay body, and the lower ends of the two first spring seats are fixedly connected to pressure plates.

[0008] Preferably, the heat dissipation structure includes a support frame fixedly connected to the inside of the heat dissipation tube, the support frame is internally engaged and rotatably connected to a second rotating rod, the end of the second rotating rod close to the heat dissipation hole is fixedly connected to a fan blade, the end of the second rotating rod away from the fan blade is fixedly connected to a driven pulley, the heat dissipation tube is coaxial with the heat dissipation hole and has the same inner diameter, and a plurality of air inlet holes are evenly spaced apart on the end surface of one side of the solid-state relay body away from the heat dissipation hole.

[0009] Preferably, the heat dissipation structure also includes a first rotating rod which is rotatably connected to the solid-state relay body, a driving pulley is fixedly connected to the outer wall of the first rotating rod close to the heat dissipation tube, the external transmission of the driving pulley and the driven pulley is connected by a belt, and a stepper motor is arranged at the end of the first rotating rod away from the heat dissipation tube, and the stepper motor is used to drive the first rotating rod to rotate.

[0010] Preferably, a limit roller is rotatably engaged with the lower end of the first rotating rod inside the solid-state relay body, and the upper end of the outer wall of the limit roller is in contact with the lower end surface of the belt and is rollingly connected thereto.

[0011] Preferably, the expansion assembly includes a fixed plate fixedly connected to one side of the middle part of the bottom surface of the solid-state relay body, an airbag is provided on the side of the fixed plate close to the skateboard, the airbag can expand when heated, the end of the airbag away from the fixed plate is fixedly connected to the skateboard, first sliding grooves are provided on both sides of the middle part of the lower end surface of the solid-state relay body, the skateboard is slidably connected to the first sliding groove, a plurality of guide rods are evenly spaced and fixedly connected to the outer side of the end surface of the skateboard close to the airbag, the ends of the plurality of guide rods away from the skateboard all penetrate the fixed plate and are slidably connected to the fixed plate, wherein the outer sides of the two guide rods at the upper and lower ends are both sleeved with a first telescopic spring, the two ends of the first telescopic spring are respectively fixedly connected to the skateboard and the fixed plate, the stepping motor is mounted on the upper end of the fixed plate, and the output end of the stepping motor penetrates the fixed plate and is fixedly connected to the first rotating rod.

[0012] Preferably, the upper end of the skateboard close to the heat dissipation tube is fixedly connected to a rotating seat, one end of the rotating seat is rotatably connected to a rotating plate, the rotating plate is made of insulating material, a conductive roller is fixedly connected to the middle of the lower end surface of the rotating plate, and a second telescopic spring is fixedly connected to the lower end of the end surface of the rotating plate close to the skateboard, and the second telescopic spring is fixedly connected to the skateboard at one end close to the skateboard.

[0013] Preferably, two power connection springs are provided at the lower middle end of the inner wall of the solid-state relay body on one side of the heat dissipation tube, the two power connection springs are made of elastic material, and the two power connection springs are electrically connected to the external power supply and the stepper motor. When the conductive roller is located between the two power connection springs, a power supply circuit can be formed to drive the stepper motor to work.

[0014] Preferably, the lower end of the conductive sheet is fixedly connected to the bottom surface of the connecting groove and one end extends into the interior of the solid-state relay body to be electrically connected to the electronic components inside the solid-state relay body. The connecting assembly includes a pressing sheet fixedly connected to the upper end of the conductive sheet, an incomplete annular groove is provided on the outer side of the middle part of the pressing sheet, a retractable rubber layer is fixedly connected to the inside of the annular groove, and the fixing bolt is arranged in the middle of the pressing sheet and the conductive sheet and penetrates the two to be threadedly connected to the solid-state relay body.

[0015] Preferably, a ring plate is fixedly connected to the outer side of the upper end surface of the conductive sheet, an insulating layer is provided on the outside of the conductive sheet, a lower connecting plate is fixedly connected to the outer side of the upper end of the conductive sheet, a plurality of second spring seats are fixedly connected to the lower end surface of the pressing sheet at uniform intervals close to the outer side, an upper connecting plate is fixedly connected to the lower ends of the plurality of second spring seats, both the upper connecting plate and the lower connecting plate are inclined and inclined toward the side of the fixing bolt, a plurality of third spring seats are fixedly connected to the inner side of the upper end of the conductive sheet at uniform intervals, and the upper ends of the plurality of third spring seats are fixedly connected to the pressing sheet.

[0016] Preferably, both ends of the outer wall of the pressing sheet are fixedly connected with sliding blocks, and the middle parts of the inner side walls at both ends of the connecting groove are provided with second sliding grooves, and the sliding blocks are slidably connected with the second sliding grooves.

[0017] Beneficial effects of the present invention: The anti-interference solid-state relay realizes stable operation in a strong magnetic environment by designing a linkage mechanism between the expansion component and the heat dissipation structure. When the internal temperature of the solid-state relay body rises to a certain level, the expansion component will respond and trigger the heat dissipation structure to start working. In this process, the heat dissipation structure inside the heat dissipation tube is effectively activated, and the solid-state relay body is efficiently dissipated through the heat dissipation holes. In particular, the design uses the principle of airbag expansion to trigger the heat dissipation structure, which not only improves the heat dissipation efficiency, but also ensures that the solid-state relay can still stably trigger the heat dissipation structure to work under strong electromagnetic interference and maintain excellent heat dissipation performance, thereby avoiding the situation where the temperature sensor of the traditional solid-state relay is affected by electromagnetic interference in a strong magnetic environment, resulting in inaccurate or failed temperature detection, causing the heat dissipation structure to not be triggered for heat dissipation.

[0018] This anti-interference solid-state relay solves the problems of loose bolts and wire falling off in traditional solid-state relay electrical connection methods. This anti-interference solid-state relay adopts a new connection component design. The fixing bolts in the connection component are tightly combined with the conductive sheet. Through the special locking structure, the wires are effectively prevented from falling off the fixing bolts and being squeezed out from between the fixing bolts and the conductive sheet. This design not only improves the stability of the wiring, but also significantly reduces the risk of circuit failure caused by wire falling off, thereby reducing safety hazards in use.

[0019] The anti-interference solid-state relay is provided with a resistance component on both sides of the lower end surface. The first spring seat in the resistance component cooperates with the pressure plate, and a continuous tightening force is generated on the mounting bolts through the elastic squeezing action of the spring. This design not only effectively prevents the mounting bolts from loosening during use, but also ensures the tight connection between the various components, thereby avoiding the solid-state relay from being disengaged from the installation position due to the loosening of the mounting bolts. In addition, the introduction of the resistance component also improves the overall shock resistance and durability of the solid-state relay, so that it can maintain excellent working performance in various harsh environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the internal three-dimensional structure of the present invention from a first viewing angle; Figure 3 for Figure 2 The enlarged view of point A in the middle; Figure 4 This is a schematic diagram of the internal three-dimensional structure of the present invention from a second viewing angle; Figure 5 for Figure 4 The enlarged view of point B in the middle; Figure 6 It is a schematic diagram of the three-dimensional structure of the connection assembly of the present invention; Figure 7 It is a schematic diagram of the internal structure of the connection component of the present invention.

[0022] The markings in the figure are: 1. Solid-state relay body; 2. Connecting groove; 3. Heat dissipation hole; 4. Pressing plate; 5. First spring seat; 6. Heat dissipation tube; 7. First rotating rod; 8. Air bag; 9. First slide groove; 10. Guide rod; 11. First telescopic spring; 12. Air inlet; 13. Fixed plate; 14. Stepping motor; 15. Fan blade; 16. Limiting roller; 17. Support frame; 18. Driven pulley; 19. Active pulley; 20. Slide plate; 21. Rotating seat; 22. Second telescopic spring; 23. Rotating plate; 24. Conductive roller; 25. Electrical connection spring; 26. Second rotating rod; 27. Belt; 28. Conductive sheet; 29. ​​Ring plate; 30. Fixing bolt; 31. Pressing sheet; 32. Rubber layer; 33. Lower connecting plate; 34. Upper connecting plate; 35. Second spring seat; 36. Third spring seat; 37. Insulating layer; 38. Second slide groove; 39. Slider. DETAILED DESCRIPTION

[0023] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0024] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0025] like Figures 1 to 7 As shown, an anti-interference solid-state relay comprises a solid-state relay body 1, heat dissipation holes 3 are provided at both ends of the middle part of one end face of the solid-state relay body 1, the inner wall of the solid-state relay body 1 is located, a heat dissipation tube 6 is fixedly connected at the position of the heat dissipation hole 3, a heat dissipation structure is arranged inside the heat dissipation tube 6, the heat dissipation structure is used to complete the cooling work inside the solid-state relay body 1, an expansion component is arranged in the middle part of the inner bottom face of the solid-state relay body 1, the expansion component is used to trigger the heat dissipation structure to work, connecting grooves 2 are provided at the four corners of the upper end of the solid-state relay body 1, a fixing bolt 30 and a conductive sheet 28 are arranged inside the connecting groove 2, a connecting component is arranged between the fixing bolt 30 and the conductive sheet 28, the connecting component is used to prevent the wire from falling off from the fixing bolt 30 and being squeezed out from between the fixing bolt 30 and the conductive sheet 28, two abutment components are arranged on both sides of the lower end face of the solid-state relay body 1, the abutment component comprises two first spring seats 5 fixedly connected to the lower end face of the solid-state relay body 1, and a pressure plate 4 is fixedly connected to the lower ends of the two first spring seats 5; The anti-interference solid-state relay significantly improves its adaptability and operating stability in a strong magnetic environment. On the one hand, the linkage between the expansion component and the heat dissipation structure is utilized, and the heat dissipation is efficiently triggered in combination with the expansion principle of the airbag 8, which effectively solves the problem that the temperature sensor of the traditional solid-state relay is affected by electromagnetic interference in a strong magnetic environment, resulting in inaccurate or failed temperature detection, and the heat dissipation structure will not be triggered to perform heat dissipation work, thereby ensuring that the relay can continue to work stably under strong electromagnetic interference. On the other hand, through the design of the connection component, a special locking structure is adopted to prevent the wire from falling off, and the spring squeezing effect of the resistance component is used to enhance the tightness of the mounting bolts, effectively avoiding the solid-state relay from being separated from the installation position due to loose bolts, further improving the reliability and safety of the relay, so that it can perform well in various complex environments.

[0026] Further, such as Figure 2 , Figures 4 to 5 As shown, the heat dissipation structure includes a support frame 17 fixedly connected to the inside of the heat dissipation tube 6, the inside of the support frame 17 is engaged and rotatably connected with a second rotating rod 26, the end of the second rotating rod 26 close to the heat dissipation hole 3 is fixedly connected with the fan blade 15, the end of the second rotating rod 26 away from the fan blade 15 is fixedly connected with a driven pulley 18, the heat dissipation tube 6 is coaxial with the heat dissipation hole 3 and has the same inner diameter, and a plurality of air inlet holes 12 are evenly spaced at an end surface of the solid-state relay body 1 away from the heat dissipation hole 3. The heat dissipation structure also includes a first rotating rod 7 engaged and rotatably connected to the solid-state relay body 1, the outer wall of the first rotating rod 7 is fixedly connected with a driving pulley 19 close to the side of the heat dissipation tube 6, the driving pulley 19 and the driven pulley 18 are externally connected with a belt 27, and a stepping motor 14 is provided at the end of the first rotating rod 7 away from the heat dissipation tube 6, and the stepping motor 14 is used to drive the first rotating rod 7 to rotate; Inside the solid-state relay body 1, the heat dissipation tube 6 is fixedly connected, and a support frame 17 is arranged inside the solid-state relay body 1. The support frame 17 is engaged and rotatably connected to the second rotating rod 26. One end of the second rotating rod 26 is fixedly connected to the fan blades 15. These fan blades 15 are located at the outlet end of the heat dissipation hole 3 and are used to accelerate the air flow to achieve the heat dissipation effect. The other end of the second rotating rod 26 is connected to the driven pulley 18. At the same time, on the side of the solid-state relay body 1 away from the heat dissipation hole 3, a plurality of air inlet holes 12 are evenly spaced to allow external cold air to enter. In order to drive the fan blades 15 to rotate, the heat dissipation structure also includes a first rotating rod 7 engaged and rotatably connected to the solid-state relay body 1. A driving pulley 19 is fixedly connected to the side of the first rotating rod 7 close to the heat dissipation tube 6. The driving pulley 19 and the driven pulley 18 are connected by a belt 27. It is important that the first rotating rod A stepper motor 14 is provided at one end of the rod 7 away from the heat dissipation tube 6. The stepper motor 14 serves as a power source to drive the first rotating rod 7 to rotate. When the stepper motor 14 is started, it drives the second rotating rod 26 to rotate through the active pulley 19, the belt 27 and the driven pulley 18, thereby driving the fan blades 15 to rotate. The rotation of the fan blades 15 accelerates the flow of air near the heat dissipation holes 3, and exchanges the heat generated inside the solid-state relay body 1 with the external cold air through the heat dissipation holes 3 and the air inlet holes 12, thereby achieving the purpose of cooling and heat dissipation. This design effectively improves the heat dissipation efficiency of the solid-state relay and ensures its stability and reliability during high-load operation. In addition, the stepper motor 14 can be used in a strong magnetic environment, and the stepper motor 14 will not interfere with the feedback signal of the motor due to the external strong magnetic environment, thereby affecting the accuracy and stability of the motor.

[0027] Further, such as Figure 5 As shown, the interior of the solid-state relay body 1 is located at the lower end of the first rotating rod 7 and is rotatably connected with the limiting roller 16, and the upper end of the outer wall of the limiting roller 16 is in contact with the lower end surface of the belt 27 and is rollingly connected thereto; The role of the limiting roller 16 is mainly reflected in two aspects: first, it serves as a support point for the transmission of the belt 27, and the upper end of its outer wall is in close contact with the lower end surface of the belt 27 and rollingly connected. This design ensures that the belt 27 can maintain stable tension and position during the transmission process, avoiding the decrease in transmission efficiency or even failure caused by loosening or deviation of the belt 27. Secondly, the rolling connection of the limiting roller 16 also reduces the friction between the belt 27 and other components inside the solid-state relay body 1, reduces energy consumption and noise, and improves the operating efficiency of the overall system. When the stepper motor 14 is started, it drives the first rotating rod 7 to rotate, and then drives the second rotating rod 26 to rotate through the active pulley 19, the belt 27 and the driven pulley 18. The fan blades 15 on the second rotating rod 26 rotate accordingly, accelerating the flow of air near the heat dissipation hole 3 and realizing effective heat dissipation. At the same time, the limiting roller 16 rolls under the belt 27 to ensure the stability and reliability of the belt 27 transmission.

[0028] Further, such as Figures 1 to 5 As shown, the expansion component includes a fixed plate 13 fixedly connected to one side of the middle part of the bottom surface of the solid-state relay body 1, an airbag 8 is arranged on one side of the fixed plate 13 close to the slide plate 20, the airbag 8 can expand when heated, and the end of the airbag 8 away from the fixed plate 13 is fixedly connected to the slide plate 20, and the first slide groove 9 is provided on both sides of the middle part of the lower end surface of the solid-state relay body 1, and the slide plate 20 is slidably connected to the first slide groove 9, and a plurality of guide rods 10 are evenly spaced and fixedly connected to the outer side of the end surface of the slide plate 20 close to the airbag 8, and the ends of the plurality of guide rods 10 away from the slide plate 20 all penetrate the fixed plate 13 and are slidably connected to the fixed plate 13, wherein the outer sides of the two guide rods 10 at the upper and lower ends are both sleeved with a first telescopic spring 11, and the two ends of the first telescopic spring 11 are respectively fixedly connected to the slide plate 20 and the fixed plate 13, and the stepper motor 14 is installed at the upper end of the fixed plate 13, and the stepper motor The output end of 14 passes through the fixed plate 13 and is fixedly connected to the first rotating rod 7. The upper end of the sliding plate 20 near the heat dissipation tube 6 is fixedly connected to a rotating seat 21. One end of the rotating seat 21 is rotatably connected to a rotating plate 23. The rotating plate 23 is made of insulating material. A conductive roller 24 is fixedly connected to the middle of the lower end surface of the rotating plate 23. The lower end of the end surface of the rotating plate 23 near the sliding plate 20 is fixedly connected to a second telescopic spring 22. One end of the second telescopic spring 22 near the sliding plate 20 is fixedly connected to the sliding plate 20. Two power-connecting springs 25 are provided at the lower end of the middle part of the inner side wall of the solid-state relay body 1 on one side of the heat dissipation tube 6. The two power-connecting springs 25 are made of elastic material, and the two power-connecting springs 25 are electrically connected to the external power supply and the stepping motor 14. When the conductive roller 24 is located between the two power-connecting springs 25, a power supply circuit can be formed to drive the stepping motor 14 to work. The expansion component responds to the change of internal temperature and triggers the heat dissipation mechanism. The fixed plate 13 is firmly connected to one side of the middle part of the inner bottom surface of the relay body, and an airbag 8 is arranged on it. When the solid-state relay is running, if the internal temperature rises to a certain extent, the airbag 8 will expand due to the heat. The expansion of the airbag 8 pushes the slide plate 20 to slide in the first slide groove 9. At the same time, multiple guide rods 10 slide on the fixed plate 13, providing a stable guide for the movement of the slide plate 20 and limiting the position of the airbag 8. The first telescopic spring 11 sleeved on the outside of these guide rods 10 plays a buffering and resetting role, ensuring that the slide plate 20 can move smoothly when the airbag 8 expands and contracts. The movement of the slide plate 20 indirectly affects the start of the stepper motor 14 through the rotating seat 21 and the rotating plate 23 thereon. The rotating plate 23 is made of insulating material, and the conductive roller 24 fixedly connected to the middle part of its lower end surface gradually approaches the power-connecting spring 25 on one side of the heat dissipation tube 6 during the movement of the slide plate 20. The two power-connecting springs 25 are made of elastic material and are electrically connected to an external power supply and the stepper motor 14. When the conductive roller 24 contacts the power-connecting spring 25 under the push of the slide plate 20 and forms a power supply circuit, the stepper motor 14 is driven by electrical energy and starts working. The start of the stepper motor 14 is a key step in starting the heat dissipation mechanism. It drives the fan blades 15 to rotate through the active pulley 19, the belt 27 and the driven pulley 18, thereby accelerating the flow of air near the heat dissipation hole 3 and achieving effective heat dissipation. The second telescopic spring 22 fixed at the lower end of the end surface of the rotating plate 23 on one side close to the slide plate 20 plays a resetting role, ensuring that when the temperature drops and the airbag 8 shrinks, the rotating plate 23 and the conductive roller 24 can quickly break away from the power-connecting spring 25, cut off the power supply circuit, and stop the stepper motor 14.

[0029] Further, such as Figure 1 , Figure 6 to Figure 7As shown, the lower end of the conductive sheet 28 is fixedly connected to the bottom surface of the connection groove 2 and one end extends into the interior of the solid-state relay body 1 to be electrically connected to the electronic components inside the solid-state relay body 1. The connecting assembly includes a pressing sheet 31 fixedly connected to the upper end of the conductive sheet 28. An incomplete annular groove is provided on the outer middle part of the pressing sheet 31. A retractable rubber layer 32 is fixedly connected inside the annular groove. A fixing bolt 30 is provided in the middle of the pressing sheet 31 and the conductive sheet 28 and penetrates the two to be threadedly connected to the solid-state relay body 1. A ring plate 29 is fixedly connected to the outer upper end surface of the conductive sheet 28. An insulating layer 37 is provided on the outside of the conductive sheet 28. The upper end of the conductive sheet 28 A lower connecting plate 33 is fixedly connected to the outside, a plurality of second spring seats 35 are evenly spaced and fixedly connected to the lower end surface of the pressing plate 31 near the outside, an upper connecting plate 34 is fixedly connected to the lower ends of the plurality of second spring seats 35, the upper connecting plate 34 and the lower connecting plate 33 are both inclined and inclined toward the side of the fixing bolt 30, a plurality of third spring seats 36 are evenly spaced and fixedly connected to the inner side of the upper end of the conductive sheet 28, the upper ends of the plurality of third spring seats 36 are fixedly connected to the pressing plate 31, both ends of the outer wall of the pressing plate 31 are fixedly connected to sliders 39, a second slide groove 38 is provided in the middle of the inner wall at both ends of the connecting groove 2, and the slider 39 is slidably connected to the second slide groove 38; In the connection slot 2 of the solid-state relay body 1, the conductive sheet 28 is a key component, and its lower end is fixedly connected to the bottom surface of the connection slot 2, and extends into the interior of the relay body to achieve electrical connection with the electronic components. In order to ensure the reliable connection between the conductive sheet 28 and the external wire, a connection assembly is provided. A pressing sheet 31 is provided at the upper end of the conductive sheet 28, and a retractable rubber layer 32 is embedded in the non-complete annular groove on the outer side of the middle part of the pressing sheet 31, which not only has an insulating effect but also provides additional fastening force and ensures the sealing of the connection. The fixing bolt 30 passes through the pressing sheet 31 and the conductive sheet 28. In the middle, the two are tightly fixed together. In order to further enhance the stability of the connection, a ring plate 29 is fixed to the outer side of the upper end surface of the conductive sheet 28 to provide additional support for the pressing sheet 31. An insulating layer 37 is provided on the outside of the conductive sheet 28 to ensure the electrical safety of the entire connection assembly. At the same time, a lower connecting plate 33 is also fixed to the outer side of the upper end of the conductive sheet 28, which together with the upper connecting plate 34 constitutes an inclined clamping structure. The upper connecting plate 34 and the lower connecting plate 33 are both inclined to the side of the fixing bolt 30. This design makes it possible for the upper connecting plate 33 to be tightened when the fixing bolt 30 is tightened. 4 and the lower connecting plate 33 can more effectively clamp the wire to prevent it from falling off. In actual use, the connecting end of the wire extends between the upper connecting plate 34 and the lower connecting plate 33, and the upper end of the second spring seat 35 is fixedly connected to the pressing plate 31, providing a downward elastic force for the pressing plate 31, further ensuring the close contact between the pressing plate 31 and the conductive sheet 28 on the wire. At the same time, sliders 39 are fixed at both ends of the outer wall of the pressing plate 31, and these sliders 39 are slidably connected to the second sliding grooves 38 on the inner side walls of the two ends of the connecting groove 2, providing a stable guide for the movement of the pressing plate 31. When the external conductive sheet 28 is in contact with the pressing plate 31, the pressing plate 31 is in contact with the conductive sheet 28. When the wire needs to be connected to the solid-state relay, it can be inserted between the conductive sheet 28 and the pressing sheet 31, and the wire can be clamped by tightening the fixing bolt 30. At this time, the inclined design of the upper connecting plate 34 and the lower connecting plate 33 and the elastic force provided by the third spring seat 36 will work together on the wire to ensure that it is firmly connected to the conductive sheet 28. At the same time, the retractable rubber layer 32 and the insulating layer 37 will provide additional fastening force and electrical safety respectively, and the upper end of the third spring seat 36 provides an upward force for the pressing sheet 31, so that the fixing bolt 30 is not easy to loosen, thereby improving the locking force.

[0030] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0031] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An anti-interference solid-state relay, characterized in that: The invention comprises a solid-state relay body (1), wherein heat dissipation holes (3) are provided at both ends of the middle of one end surface of the solid-state relay body (1), a heat dissipation tube (6) is fixedly connected to the inner wall of the solid-state relay body (1) at the position of the heat dissipation hole (3), a heat dissipation structure is provided inside the heat dissipation tube (6), and the heat dissipation structure is used to cool the inside of the solid-state relay body (1), an expansion component is provided in the middle of the inner bottom surface of the solid-state relay body (1), and the expansion component is used to trigger the heat dissipation structure to work, and connection grooves (2) are provided at the four corners of the upper end of the solid-state relay body (1). ), a fixing bolt (30) and a conductive sheet (28) are arranged inside the connection groove (2), a connecting assembly is arranged between the fixing bolt (30) and the conductive sheet (28), the connecting assembly is used to prevent the wire from falling off the fixing bolt (30) and being squeezed out from between the fixing bolt (30) and the conductive sheet (28), two abutment assemblies are arranged on both sides of the lower end surface of the solid-state relay body (1), the abutment assemblies include two first spring seats (5) fixedly connected to the lower end surface of the solid-state relay body (1), and the lower ends of the two first spring seats (5) are fixedly connected to a pressure plate (4).

2. The anti-interference solid-state relay according to claim 1, characterized in that: The heat dissipation structure comprises a support frame (17) fixedly connected to the inside of the heat dissipation tube (6); a second rotating rod (26) is rotatably connected to the inside of the support frame (17); an end of the second rotating rod (26) close to the heat dissipation hole (3) is fixedly connected to the fan blade (15); an end of the second rotating rod (26) away from the fan blade (15) is fixedly connected to the driven pulley (18); the heat dissipation tube (6) and the heat dissipation hole (3) are coaxial and have the same inner diameter; and a plurality of air inlet holes (12) are evenly spaced apart on an end surface of a side of the solid-state relay body (1) away from the heat dissipation hole (3).

3. The anti-interference solid-state relay according to claim 2, characterized in that: The heat dissipation structure further comprises a first rotating rod (7) which is engaged and rotatably connected to the solid-state relay body (1); a driving pulley (19) is fixedly connected to the outer wall of the first rotating rod (7) on the side close to the heat dissipation tube (6); a belt (27) is connected to the external transmission of the driving pulley (19) and the driven pulley (18); a stepping motor (14) is provided at one end of the first rotating rod (7) away from the heat dissipation tube (6); the stepping motor (14) is used to drive the first rotating rod (7) to rotate.

4. The anti-interference solid-state relay according to claim 3, characterized in that: The interior of the solid-state relay body (1) is rotatably connected to a limit roller (16) at the lower end of the first rotating rod (7), and the upper end of the outer wall of the limit roller (16) is in contact with the lower end surface of the belt (27) and is rollingly connected thereto.

5. The anti-interference solid-state relay according to claim 4, characterized in that: The expansion assembly comprises a fixing plate (13) fixedly connected to one side of the middle of the inner bottom surface of the solid-state relay body (1); an airbag (8) is arranged on one side of the fixing plate (13) close to the slide plate (20); the airbag (8) can expand when heated; one end of the airbag (8) away from the fixing plate (13) is fixedly connected to the slide plate (20); first slide grooves (9) are provided on both sides of the middle of the lower end surface of the solid-state relay body (1); the slide plate (20) is slidably connected to the first slide grooves (9); and the outer side of the end surface of the slide plate (20) close to the airbag (8) is uniformly A plurality of guide rods (10) are fixedly connected at intervals, and the ends of the plurality of guide rods (10) away from the slide plate (20) all penetrate the fixed plate (13) and are slidably connected to the fixed plate (13), wherein the outer parts of the two guide rods (10) at the upper and lower ends are sleeved with a first telescopic spring (11), and the two ends of the first telescopic spring (11) are respectively fixedly connected to the slide plate (20) and the fixed plate (13), and the stepping motor (14) is mounted on the upper end of the fixed plate (13), and the output end of the stepping motor (14) penetrates the fixed plate (13) and is fixedly connected to the first rotating rod (7).

6. The anti-interference solid-state relay according to claim 5, characterized in that: The upper end of the slide plate (20) on one side close to the heat dissipation cylinder (6) is fixedly connected to a rotating seat (21); one end of the rotating seat (21) is rotatably connected to a rotating plate (23); the rotating plate (23) is made of insulating material; a conductive roller (24) is fixedly connected to the middle of the lower end surface of the rotating plate (23); a second telescopic spring (22) is fixedly connected to the lower end of the end surface of the side close to the slide plate (20); one end of the second telescopic spring (22) close to the slide plate (20) is fixedly connected to the slide plate (20).

7. The anti-interference solid-state relay according to claim 6, characterized in that: The solid-state relay body (1) is provided with two power connection springs (25) at the lower end of the middle portion of the inner side wall on one side of the heat dissipation tube (6); the two power connection springs (25) are made of elastic material, and the two power connection springs (25) are electrically connected to an external power supply and a stepper motor (14); when the conductive roller (24) is located between the two power connection springs (25), a power supply circuit can be formed to drive the stepper motor (14) to work.

8. The anti-interference solid-state relay according to claim 7, characterized in that: The lower end of the conductive sheet (28) is fixedly connected to the inner bottom surface of the connection groove (2) and one end extends into the interior of the solid-state relay body (1) to be electrically connected to the electronic components inside the solid-state relay body (1). The connection assembly comprises a pressing sheet (31) fixedly connected to the upper end of the conductive sheet (28), an incomplete annular groove is provided on the outer middle part of the pressing sheet (31), a retractable rubber layer (32) is fixedly connected inside the annular groove, and the fixing bolt (30) is arranged in the middle of the pressing sheet (31) and the conductive sheet (28) and penetrates the two to be threadedly connected to the solid-state relay body (1).

9. The anti-interference solid-state relay according to claim 8, characterized in that: A ring plate (29) is fixedly connected to the outer side of the upper end surface of the conductive sheet (28); an insulating layer (37) is provided on the outside of the conductive sheet (28); a lower connecting plate (33) is fixedly connected to the outer side of the upper end of the conductive sheet (28); a plurality of second spring seats (35) are fixedly connected to the lower end surface of the pressing sheet (31) at even intervals near the outer side; an upper connecting plate (34) is fixedly connected to the lower ends of the plurality of second spring seats (35); the upper connecting plate (34) and the lower connecting plate (33) are both inclined and inclined toward the fixing bolt (30); a plurality of third spring seats (36) are fixedly connected to the inner side of the upper end of the conductive sheet (28) at even intervals; the upper ends of the plurality of third spring seats (36) are fixedly connected to the pressing sheet (31).

10. The anti-interference solid-state relay according to claim 9, characterized in that: Both ends of the outer wall of the pressing sheet (31) are fixedly connected with sliding blocks (39), and the middle parts of the inner side walls of both ends of the connecting groove (2) are provided with second sliding grooves (38), and the sliding blocks (39) are slidably connected with the second sliding grooves (38).

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