High-power direct-current solid relay

Abstract

The utility model discloses a high-power direct-current solid-state relay, which relates to the field of solid-state relays and comprises a solid-state relay body, two sides of the solid-state relay body are connected with electric wire connecting blocks, connecting grooves are arranged in the electric wire connecting blocks, and the connecting grooves are connected with the solid-state relay body. A wiring board is connected into the connecting groove, and a fixing bolt rod is connected into the wire connecting block in a threaded mode. The wire groove provided with the lower protection plate, the upper protection plate, the upper protection plate and the lower protection plate can be connected to the outer end of a wire, and the sealing ring seals a connection gap and can seal a wire head and a connection groove, so that water molecules can be prevented from permeating, the waterproof performance is improved, dust, fine particles, impurities and the like can be prevented from entering, the dustproof effect is enhanced, and the service life of the wire groove is prolonged. Therefore, the device can better deal with various severe environmental conditions, faults caused by external environmental factors are reduced, and the reliability and stability of the solid state relay are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of solid state relays, and particularly relates to a high-power DC solid state relay. Background Art

[0002] A high-power DC solid state relay, also known as a solid state relay or SSR, is a contactless electronic switch that uses semiconductor devices to control the on / off of a circuit. Compared with traditional mechanical relays, high-power DC solid state relays have the advantages of long life, high reliability, no sparks, no noise, and low electromagnetic interference, and are particularly suitable for occasions that require high reliability and high-frequency switching.

[0003] However, in the existing DC solid state relays, there is no protective and sealing structure at the wiring part, which makes part of the wire head and the wiring board exposed to the air. It is easily affected by the external environment, such as moisture, dust, fine particles and impurities, etc. These factors may cause wire aging, corrosion or short circuit, thereby reducing the performance of the solid state relay and affecting its stability and reliability.

[0004] To solve this technical problem, the utility model proposes a high-power DC solid state relay. Summary of the Utility Model

[0005] The main purpose of the utility model is to provide a high-power DC solid state relay, which can effectively solve the problems mentioned in the background art.

[0006] To achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0007] A high-power DC solid state relay, including a solid state relay body, wire connection blocks are connected to both sides of the solid state relay body, connection grooves are opened in the wire connection blocks, wiring boards are connected in the connection grooves, fixing bolt rods are threadedly connected in the wire connection blocks, a lower pressing plate is rotatably connected to the lower ends of the fixing bolt rods, sliding grooves are opened at the side ends of the wire connection blocks, lower protection plates and upper protection plates are arranged at the outer ends of the sliding grooves, a connecting plate is connected to the upper end of the upper protection plate, wire grooves are opened at the side ends of the lower protection plates and the upper protection plates, and sealing rings are connected to the inner walls of the wire grooves.

[0008] Preferably, a rotating head is connected to the upper end of the fixing bolt rod, the lower pressing plate is slidably connected in the connection groove, the lower pressing plate is located directly above the wiring board, and the lower end of the wiring board is connected to the solid state relay body.

[0009] Preferably, anti-slip grooves are opened on the upper surface of the wiring board and the lower surface of the lower pressing plate, the upper protection plate is located above the lower protection plate, and the two can be aligned and connected. At this time, the wire grooves of the two are connected to form a wire hole.

[0010] Preferably, the connecting plate is located at the upper end of the wire connection block. A connector is connected to the upper end of the connecting plate. An annular groove is formed in the fixed bolt rod. The connector is located at the outer end of the annular groove and the two are slidably connected.

[0011] Preferably, fixing holes are correspondingly formed in the side end of the lower protection plate and in the sliding groove. A bolt rod is arranged in the fixing hole. Half-ring plates are arranged in the lower protection plate and the upper protection plate. The wire groove is formed in the half-ring plate.

[0012] Preferably, mounting rings are connected to the inner sides of the lower protection plate and the upper protection plate. The mounting rings are located at the side ends of the half-ring plates. Connecting holes are correspondingly formed in the half-ring plates and the mounting rings. A bolt rod is arranged in the connecting hole.

[0013] Preferably, mounting plates are connected to both sides of the solid state relay body. The mounting plates are located between the wire connection blocks. Mounting holes are formed in the mounting plates. A bolt rod is arranged in the mounting hole.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] In the utility model, by providing a wire connection block, the wire head is inserted into the connection groove, and then the fixed bolt rod is rotated, which will drive the lower pressing plate to move downward, so as to cooperate with the wiring board, and the wire head can be clamped and fixed between the lower pressing plate and the wiring board, thus completing the connection of the wire. By providing a lower protection plate and an upper protection plate, when the fixed bolt rod moves downward, the upper protection plate can be driven to move downward through the connecting plate, so as to be connected with the lower protection plate. The wire grooves of the upper protection plate and the lower protection plate can be connected to the outer end of the wire. The sealing ring can seal the connection gap, so as to seal the wire head and the connection groove, thus preventing water molecules from seeping in, improving the waterproof performance, and also being able to block dust, fine particles and impurities from entering, enhancing the dust-proof effect, so that the device can better cope with various harsh environmental conditions, reduce failures caused by external environmental factors, and improve the reliability and stability of the solid state relay.

[0016] In the utility model, by providing a half-ring plate and a mounting ring, the half-ring plate is connected to the side end of the mounting ring through the connecting hole and the bolt rod, so that the half-ring plate can be disassembled and replaced, and thus a half-ring plate with a wire groove of a different radius can be selected according to the radius of the wire, so that the device is applicable to wires of different radii, and it has strong applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of a high-power DC solid state relay of the utility model;

[0018] Figure 2Schematic diagram of the wire connection block structure of a high-power DC solid relay of the present utility model;

[0019] Figure 3 Schematic diagram of the lower pressing plate structure of a high-power DC solid relay of the present utility model;

[0020] Figure 4 Schematic diagram of the mounting ring structure of a high-power DC solid relay of the present utility model;

[0021] Figure 5 Schematic diagram of the cross-sectional structure of the wire connection block of a high-power DC solid relay of the present utility model.

[0022] In the figure: 1, solid relay body; 2, wire connection block; 3, connection groove; 4, wiring board; 5, fixed bolt rod; 6, lower pressing plate; 7, sliding groove; 8, lower protection plate; 9, upper protection plate; 10, connecting plate; 11, wire groove; 12, sealing ring; 13, connecting head; 14, ring groove; 15, fixing hole; 16, semi-circular plate; 17, mounting ring; 18, connecting hole; 19, mounting plate; 20, mounting hole. Detailed implementation manners

[0023] In order to make the technical means, creative features, achieved purposes and effects of the present utility model easy to understand, the present utility model will be further described below in conjunction with specific implementation manners.

[0024] As Figures 1-5 shown, a high-power DC solid relay includes a solid relay body 1. Wire connection blocks 2 are connected to both sides of the solid relay body 1. The wire connection blocks 2 are used to connect wires so that the current can be connected to the solid relay body 1. Mounting plates 19 are connected to both sides of the solid relay body 1. The mounting plates 19 are located between the wire connection blocks 2. Mounting holes 20 are provided in the mounting plates 19. A bolt rod is arranged in the mounting holes 20. By passing the bolt rod through the mounting holes 20, the device can be fixed through the mounting plates 19.

[0025] A connection groove 3 is provided in the wire connection block 2. The wire head is inserted into the connection groove 3. A wiring board 4 is connected in the connection groove 3. The lower end of the wiring board 4 is connected to the solid relay body 1. In this way, the current in the wire head will enter the solid relay body 1 through the wiring board 4. A threaded hole is provided in the wire connection block 2. A fixed bolt rod 5 is threadedly connected in the threaded hole. The upper end of the fixed bolt rod 5 is connected with a rotating head. The rotating head is used to facilitate the staff to drive the fixed bolt rod 5 to rotate. The lower end of the fixed bolt rod 5 is rotatably connected with a lower pressing plate 6. The lower pressing plate 6 is slidably connected in the connection groove 3. In this way, the lower pressing plate 6 cannot rotate and can only move up and down in the connection groove 3. The lower pressing plate 6 is located directly above the wiring board 4.

[0026] After inserting the wire head into the connection groove 3, rotate the fixing bolt rod 5 to make it move downward, thereby pushing the lower pressing plate 6 downward, so as to cooperate with the wiring board 4 to clamp and fix the wire head. Anti-slip grooves are provided on the upper surface of the wiring board 4 and the lower surface of the lower pressing plate 6, and the anti-slip grooves are used to increase the friction between the two and the wire head, so as to improve the clamping and fixing effect of the two.

[0027] A chute 7 is provided at the side end of the wire connection block 2. A lower protection plate 8 and an upper protection plate 9 are arranged at the outer end of the chute 7. The upper protection plate 9 can slide up and down in the chute 7. Wire grooves 11 are provided at the side ends of the lower protection plate 8 and the upper protection plate 9. A sealing ring 12 is connected to the inner wall of the wire groove 11. The sealing ring 12 is used to seal the gap between the wire groove 11 and the wire, so as to prevent water vapor and dust from entering the connection groove 3. The upper protection plate 9 is located above the lower protection plate 8, and the two can be aligned and connected. At this time, the wire grooves 11 of the two are connected to form a wire hole, and the wire is located in the wire hole. A connecting plate 10 is connected to the upper end of the upper protection plate 9, and the connecting plate 10 is located above the wire connection block 2.

[0028] Fixing holes 15 are correspondingly provided in the chute 7 at the side end of the lower protection plate 8. A bolt rod is arranged in the fixing holes 15. The lower protection plate 8 can be connected and fixed through the bolt rod and the fixing holes 15. A connecting head 13 is connected to the upper end of the connecting plate 10. An annular groove 14 is provided in the fixing bolt rod 5. The connecting head 13 is located at the outer end of the annular groove 14, and the two are slidably connected. Therefore, when the fixing bolt rod 5 rotates, it will not drive the connecting plate 10 to rotate through the connecting head 13, but can drive the connecting plate 10 to move up and down following it, thereby driving the upper protection plate 9 to move up and down, so that the upper protection plate 9 can be connected to the lower protection plate 8, and thus the wire grooves 11 of the two can be connected to the outer end of the wire.

[0029] Half-ring plates 16 are arranged in the lower protection plate 8 and the upper protection plate 9. The wire grooves 11 are provided in the half-ring plates 16. Mounting rings 17 are connected to the inner sides of the lower protection plate 8 and the upper protection plate 9. The mounting rings 17 are located at the side ends of the half-ring plates 16. Connecting holes 18 are correspondingly provided in the half-ring plates 16 and the mounting rings 17. A bolt rod is arranged in the connecting holes 18. The half-ring plates 16 can be connected to the side ends of the mounting rings 17 through the bolt rod and the connecting holes 18, and at the same time, the half-ring plates 16 can also be disassembled. In this way, half-ring plates 16 with different wire groove 11 radii can be selected according to the radius of the wire, so that the device can be suitable for wires with different radii.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and all these changes and improvements fall within the scope of the present utility model claimed. The scope of protection claimed for the present utility model is defined by the appended claims and their equivalents.

Claims

1. A high-power DC solid-state relay, comprising a solid-state relay body (1), characterized in that: On both sides of the solid relay body (1), there are wire connection blocks (2). A connection groove (3) is opened in the wire connection block (2). A wiring board (4) is connected in the connection groove (3). A fixed bolt rod (5) is threadedly connected in the wire connection block (2). The lower end of the fixed bolt rod (5) is rotatably connected to a lower pressing plate (6). A sliding groove (7) is opened at the side end of the wire connection block (2). An upper protective plate (9) and a lower protective plate (8) are arranged at the outer end of the sliding groove (7). A connecting plate (10) is connected to the upper end of the upper protective plate (9). Wire grooves (11) are opened at the side ends of the lower protective plate (8) and the upper protective plate (9). A sealing ring (12) is connected to the inner wall of the wire groove (11).

2. The high-power DC solid-state relay according to claim 1, wherein: The upper end of the fixed bolt rod (5) is connected with a rotating head. The lower pressing plate (6) is slidably connected in the connection groove (3). The lower pressing plate (6) is located directly above the wiring board (4). The lower end of the wiring board (4) is connected to the solid relay body (1).

3. The high-power DC solid-state relay according to claim 1, characterized in that: Anti-slip grooves are opened on the upper surface of the wiring board (4) and the lower surface of the lower pressing plate (6). The upper protective plate (9) is located above the lower protective plate (8), and the two can be aligned and connected. At this time, the wire grooves (11) of the two are connected to form a wire hole.

4. A high-power DC solid-state relay according to claim 1, characterized in that: The connecting plate (10) is located above the wire connection block (2). A connecting head (13) is connected to the upper end of the connecting plate (10). An annular groove (14) is opened in the fixed bolt rod (5). The connecting head (13) is located at the outer end of the annular groove (14), and the two are slidably connected.

5. A high-power DC solid-state relay according to claim 1, characterized in that: Corresponding fixing holes (15) are opened in the side end of the lower protective plate (8) and the sliding groove (7). A bolt rod is arranged in the fixing hole (15). Half-ring plates (16) are arranged in the lower protective plate (8) and the upper protective plate (9). The wire groove (11) is opened in the half-ring plate (16).

6. The high-power DC solid relay according to claim 5, wherein: Installation rings (17) are connected to the inner sides of the lower protective plate (8) and the upper protective plate (9). The installation rings (17) are located at the side ends of the half-ring plates (16). Connecting holes (18) are correspondingly opened in the half-ring plates (16) and the installation rings (17). A bolt rod is arranged in the connecting hole (18).

7. A high-power DC solid-state relay according to claim 1, characterized in that: Mounting plates (19) are connected to both sides of the solid relay body (1). The mounting plates (19) are located between the wire connection blocks (2). Mounting holes (20) are opened in the mounting plates (19). A bolt rod is arranged in the mounting hole (20).

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