Direct current contactor

Abstract

The utility model belongs to the technical field of direct current contactors, and particularly relates to a direct current contactor which comprises a waterproof cover, a magnetic conductive plate assembly is arranged at the upper end of the waterproof cover, a framework assembly is arranged on the inner side wall of the waterproof cover, a first sunk screw is arranged between the waterproof cover and the framework assembly, and a coil is arranged on the inner wall of the framework assembly. The coil is located in the framework assembly. According to the utility model, through the arrangement of structures such as the spring and the limiting block, the square fuse can be quickly positioned, the subsequent vibration deflection problem of the square fuse can be avoided, and the square fuse can be locked under the structures such as the hexagon bolt I, the hexagon nut I and the spring washer I; the fuse and the direct current contactor are in a fixed state, so that the safety device can be directly installed on the direct current contactor product, the use is convenient, and a good current protection effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of direct current contactors, in particular to a direct current contactor. Background Art

[0002] As we all know, DC contactors, as an important electrical control component, are widely used in many fields such as electricity, automation control, transportation, shipbuilding, industrial manufacturing, etc. They are mainly used to control the on and off of DC circuits and realize remote or automatic control of DC loads. Its working principle is that when the DC contactor coil is energized, the current in the coil generates a magnetic field, attracting the moving iron core. The movement of the moving iron core drives the contact to move through the mechanical linkage mechanism, closing the main contact and thus connecting the circuit. When the coil is de-energized or the current is reduced to a level that is insufficient to maintain the electromagnetic force, the reaction force of the reset spring resets the moving iron core, driving the contact system to move in the opposite direction through the mechanical linkage mechanism, causing the main contacts to separate, thereby cutting off the circuit.

[0003] A fuse is a current protection element. Its working principle is based on the thermal effect of current. When the rated current does not exceed the rated current of the fuse, the current can pass smoothly through the fuse to enable the connected equipment to work normally. If the rated current is greater than the rated current of the fuse, the temperature rise continues to rise, and the metal wire in the fuse reaches the melting point and begins to melt, forming a short circuit, thereby quickly cutting off the circuit and preventing the current from continuing to flow in a short time, avoiding damage to other equipment and fire and other dangerous situations;

[0004] The main function of the DC contactor and fuse is to protect the circuit. In the DC circuit, if there is an overload, short circuit or the contactor works in an overload state for a long time, the current in the circuit may increase abnormally, thereby damaging the contactor or other circuit components. The fuse can quickly melt when the current exceeds its rated value and cut off the circuit, thereby preventing damage caused by overload and improving the safety and reliability of the electrical system.

[0005] However, the existing DC contactors still have certain shortcomings: the safety devices used in the existing DC contactors have no fixed structure and need to be installed separately, which will cause the problem of time-consuming, labor-intensive and labor-intensive assembly process. Utility Model Content

[0006] The utility model aims to provide a DC contactor, which solves the problem that the safety device used in the existing DC contactor has no fixed structure and needs to be installed separately, which will cause time, labor and labor consumption in the assembly process.

[0007] To achieve the above object, the present utility model provides the following technical solutions: A DC contactor, including a waterproof cover, a magnetic conductive plate assembly is arranged at the upper end of the waterproof cover, a skeleton assembly is arranged on the inner side wall of the waterproof cover, a countersunk head screw one is arranged between the waterproof cover and the skeleton assembly, a coil is arranged on the inner wall of the skeleton assembly, the coil is located inside the skeleton assembly, a gasket one is arranged at the inner bottom of the coil, a gasket two is arranged in the middle of the inner side wall of the coil, a moving iron core is arranged on the inner side wall of the coil and above the gasket two, a center rod is arranged on the inner wall of the moving iron core, a split pin is arranged on the inner wall of the center rod, a base is arranged at the upper end of the horizontal part of the magnetic conductive plate assembly, the base contacts the moving iron core, and three sets of screws one are arranged between the base and the magnetic conductive plate assembly;

[0008] A hexagon bolt one is arranged on the right side of the base, a static contact assembly is slidably connected to the outside of the hexagon bolt one, the static contact assembly contacts the base, a countersunk head screw two is arranged between the static contact assembly and the base, a square fuse is slidably sleeved on the outside of the hexagon bolt one, the square fuse contacts the static contact assembly, a gasket three is slidably connected to the outside of the hexagon bolt one, the gasket three contacts the square fuse, a flat washer one is slidably connected to the outside of the hexagon bolt one, the flat washer one contacts the gasket three, a hexagon nut one is threadedly connected to the outside of the hexagon bolt one, and a spring washer one is arranged on the outside of the hexagon bolt one;

[0009] An insulating sleeve is arranged on the inner wall of the base, the insulating sleeve contacts the center rod, an insulator is arranged on the outside of the center rod, the insulator contacts the insulating sleeve, a moving contact assembly is arranged on the outside of the insulator, a magnetic isolation sheet is arranged on the outside of the insulator, the magnetic isolation sheet contacts the moving contact assembly, a spring seat is arranged on the outside of the insulator, the spring seat contacts the magnetic isolation sheet, a bowl-shaped gasket is arranged on the outside of the center rod, a moving spring is arranged on the outside of the spring seat, a sealing ring is arranged at the upper end of the static contact assembly, a cover is arranged at the upper end of the sealing ring, three sets of screws two are arranged between the cover and the static contact assembly, and a hexagon bolt two is arranged on the left side of the base, and the hexagon bolt two penetrates through the static contact assembly.

[0010] Preferably, a reaction spring contacts the lower end of the center rod, the reaction spring passes through the gasket two, and the other end of the reaction spring is welded to the gasket one. Through the setting of the reaction spring, the center rod can be supported for use.

[0011] Preferably, one end of the spring washer one contacts the hexagon nut one, and the other end of the spring washer one contacts the flat washer one. Through the setting of the spring washer one, the flat washer one can be pressed for use.

[0012] Preferably, the moving spring is located outside the insulator and the central rod. One end of the moving spring is welded to the bowl cushion, and the other end of the moving spring is welded to the spring seat. Through the arrangement of the moving spring, the bowl cushion can be connected and used.

[0013] Preferably, a round head screw is arranged between the base and the static contact assembly. A connecting piece is arranged outside the round head screw, and the connecting piece is in contact with the base. A second flat washer is arranged outside the round head screw, and a second hexagonal nut is threadedly connected to the outside of the round head screw. A second spring washer is arranged outside the second hexagonal nut. One end of the second spring washer is in contact with the second hexagonal nut, and the other end of the second spring washer is in contact with the second flat washer. Through the arrangement of structures such as the round head screw and the second hexagonal nut, the base and the static contact assembly can be locked and fixed.

[0014] Preferably, a guide piece is fixedly connected to the inner side wall of the first hexagonal bolt. Two symmetrically distributed moving pieces are slidably sleeved outside the guide piece. Each moving piece is slidably connected to the first hexagonal bolt. A spring is welded between the two moving pieces. A limiting block is fixedly connected to the end face of each moving piece close to the square fuse. The limiting block is slidably connected to the first hexagonal bolt and is slidably connected to the square fuse. Through the arrangement of structures such as the spring, the moving pieces, and the limiting block, the square fuse can be quickly positioned, and the subsequent vibration and deflection problems of the square fuse can be solved.

[0015] The beneficial effects of the present utility model are as follows:

[0016] Through the arrangement of structures such as the spring and the limiting block, the square fuse can be quickly positioned, and the subsequent vibration and deflection problems of the square fuse can be avoided. Under the structures of the first hexagonal bolt, the first hexagonal nut, the first spring washer, etc., the square fuse can be locked and fixed, so that the fuse is in a fixed state with the DC contactor. Furthermore, the fuse device can be directly installed on the DC contactor product, which is convenient to use and plays a good role in current protection. Description of the Drawings

[0017] Figure 1 is a three-dimensional view of the overall structure of the present utility model;

[0018] Figure 2 is of the present utility model Figure 1 front elevation sectional view;

[0019] Figure 3 is of the present utility model Figure 1 partial side elevation sectional view;

[0020] Figure 4 is of the present utility model Figure 2 enlarged sectional view of the square fuse.

[0021] In the figure: 1. Waterproof cover; 2. Skeleton assembly; 3. Coil; 4. Gasket 1; 5. Reaction spring; 6. Gasket 2; 7. Magnetic conduction plate assembly; 8. Moving iron core; 9. Base; 10. Hexagon bolt 1; 11. Static contact assembly; 12. Square fuse; 121. Guide piece; 122. Moving piece; 123. Spring; 124. Limit block; 13. Gasket 3; 14. Flat washer 1; 15. Spring washer 1; 16. Hexagon nut 1; 17. Moving contact assembly; 18. Spring seat; 19. Moving spring; 20. Split pin; 21. Center rod; 22. Bowl gasket; 23. Cover; 24. Magnetic isolation sheet; 25. Sealing ring; 26. Hexagon bolt 2; 27. Insulator; 28. Insulating sleeve; 29. Countersunk head screw 1; 30. Three-component screw 1; 31. Round head screw; 32. Connecting piece; 33. Flat washer 2; 34. Spring washer 2; 35. Hexagon nut 2; 36. Three-component screw 2; 37. Countersunk head screw 2. Specific implementation mode

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0023] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , a DC contactor, including a waterproof cover 1, a magnetic conduction plate assembly 7 is arranged at the upper end of the waterproof cover 1, a skeleton assembly 2 is arranged on the inner side wall of the waterproof cover 1, a countersunk head screw 1 29 is arranged between the waterproof cover 1 and the skeleton assembly 2, a coil 3 is arranged on the inner wall of the skeleton assembly 2, the coil 3 is located inside the skeleton assembly 2, a gasket 1 4 is arranged at the inner bottom of the coil 3, a gasket 2 6 is arranged in the middle of the inner side wall of the coil 3, a moving iron core 8 is arranged on the inner side wall of the coil 3 and above the gasket 2 6, a center rod 21 is arranged on the inner wall of the moving iron core 8, a split pin 20 is arranged on the inner wall of the center rod 21, a base 9 is arranged at the upper end of the horizontal part of the magnetic conduction plate assembly 7, the base 9 is in contact with the moving iron core 8, and a three-component screw 1 30 is arranged between the base 9 and the magnetic conduction plate assembly 7;

[0024] On the right side of the base 9, there is a hexagon bolt 10. A static contact assembly 11 is slidably connected to the outside of the hexagon bolt 10. The static contact assembly 11 contacts the base 9. A countersunk head screw 37 is provided between the static contact assembly 11 and the base 9. A square fuse 12 is slidably sleeved on the outside of the hexagon bolt 10. The square fuse 12 contacts the static contact assembly 11. A gasket 13 is slidably connected to the outside of the hexagon bolt 10. The gasket 13 contacts the square fuse 12. A flat washer 14 is slidably connected to the outside of the hexagon bolt 10. The flat washer 14 contacts the gasket 13. A hexagon nut 16 is threadedly connected to the outside of the hexagon bolt 10. A spring washer 15 is provided on the outside of the hexagon bolt 10;

[0025] An insulating sleeve 28 is provided on the inner wall of the base 9. The insulating sleeve 28 contacts the center rod 21. An insulator 27 is provided on the outside of the center rod 21. The insulator 27 contacts the insulating sleeve 28. A moving contact assembly 17 is provided on the outside of the insulator 27. A magnetic separation sheet 24 is provided on the outside of the insulator 27. The magnetic separation sheet 24 contacts the moving contact assembly 17. A spring seat 18 is provided on the outside of the insulator 27. The spring seat 18 contacts the magnetic separation sheet 24. A bowl gasket 22 is provided on the outside of the center rod 21. A moving spring 19 is provided on the outside of the spring seat 18. A sealing ring 25 is provided at the upper end of the static contact assembly 11. A cover 23 is provided at the upper end of the sealing ring 25. A three-piece screw 36 is provided between the cover 23 and the static contact assembly 11. A hexagon bolt 26 is provided on the left side of the base 9. The hexagon bolt 26 penetrates through the static contact assembly 11.

[0026] Please refer to Figure 1 、 Figure 2 The lower end of the center rod 21 contacts a reaction spring 5. The reaction spring 5 passes through the gasket 6. The other end of the reaction spring 5 is welded to the gasket 4. Through the setting of the reaction spring 5, the center rod 21 can be supported. One end of the spring washer 15 contacts the hexagon nut 16. The other end of the spring washer 15 contacts the flat washer 14. Through the setting of the spring washer 15, the flat washer 14 can be pressed. The moving spring 19 is located on the outside of the insulator 27 and the center rod 21. One end of the moving spring 19 is welded to the bowl gasket 22. The other end of the moving spring 19 is welded to the spring seat 18. Through the setting of the moving spring 19, the bowl gasket 22 can be connected.

[0027] Please refer to Figure 1 、 Figure 2 、 Figure 3, a round head screw 31 is provided between the base 9 and the static contact assembly 11. A connecting piece 32 is arranged outside the round head screw 31. The connecting piece 32 contacts the base 9. A second flat washer 33 is arranged outside the round head screw 31. A second hexagon nut 35 is threadedly connected to the outside of the round head screw 31. A second spring washer 34 is arranged outside the second hexagon nut 35. One end of the second spring washer 34 contacts the second hexagon nut 35, and the other end of the second spring washer 34 contacts the second flat washer 33. Through the arrangement of structures such as the round head screw 31 and the second hexagon nut 35, the locking treatment can be carried out between the base 9 and the static contact assembly 11.

[0028] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , a guide piece 121 is fixedly connected to the inner side wall of the first hexagon bolt 10. Two symmetrically distributed moving pieces 122 are slidably sleeved outside the guide piece 121. Each moving piece 122 is slidably connected to the first hexagon bolt 10. A spring 123 is welded between the two moving pieces 122. A limiting block 124 is fixedly connected to the end face of each moving piece 122 close to the square fuse 12. The limiting block 124 is slidably connected to the first hexagon bolt 10 and the square fuse 12. Through the arrangement of structures such as the spring 123, the moving pieces 122, and the limiting block 124, the rapid positioning treatment can be carried out on the square fuse 12, and the subsequent vibration and deflection problems of the square fuse 12 can be changed.

[0029] The specific implementation process of the present utility model is as follows: When in use, by pushing the two moving pieces 122 to move towards each other, the moving pieces 122 move along the surface of the guide piece 121, the spring 123 deforms, and drives the limiting block 124 to move. Then, the square fuse 12 is pushed to be sleeved outside the first hexagon bolt 10, so that the square fuse 12 contacts the static contact assembly 11, and the moving pieces 122 are released to enable the spring 123 to restore its deformation, so as to push the limiting block 124 to insert into the square fuse 12, perform positioning treatment on the square fuse 12, and avoid the subsequent vibration and deflection problems of the square fuse 12;

[0030] Through the combined use of structures such as the first hexagon nut 16 and the first spring washer 15, the locking treatment can be carried out on the square fuse 12, so that the square fuse 12 is in a fixed state with the DC contactor. Furthermore, the insurance device can be directly installed on the DC contactor product, which is convenient to use and plays a good role in current protection.

[0031] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A DC contactor, comprising a waterproof cover (1), characterized in that: A magnetic conductive plate assembly (7) is arranged at the upper end of the waterproof cover (1), a frame assembly (2) is arranged on the inner wall of the waterproof cover (1), a countersunk screw (29) is arranged between the waterproof cover (1) and the frame assembly (2), a coil (3) is arranged on the inner wall of the frame assembly (2), the coil (3) is located inside the frame assembly (2), a gasket (4) is arranged at the inner bottom of the coil (3), and a gasket (5) is arranged in the middle of the inner wall of the coil (3). The second gasket (6) is provided with a moving iron core (8) on the inner side wall of the coil (3) and located on the upper side of the second gasket (6), the inner wall of the moving iron core (8) is provided with a center rod (21), the inner wall of the center rod (21) is provided with a split pin (20), the upper end of the horizontal part of the magnetic plate assembly (7) is provided with a base (9), the base (9) is in contact with the moving iron core (8), and three combination screws (30) are provided between the base (9) and the magnetic plate assembly (7); A hexagonal bolt (10) is provided on the right side of the base (9), and a static contact assembly (11) is slidably connected to the outer side of the hexagonal bolt (10), and the static contact assembly (11) is in contact with the base (9). A countersunk screw (37) is provided between the static contact assembly (11) and the base (9), and a square fuse (12) is slidably sleeved on the outer side of the hexagonal bolt (10), and the square fuse (12) and the static contact assembly (11) are in contact with each other. The outer side of the hexagonal bolt (10) is slidably connected with a gasket (13), and the gasket (13) is in contact with the square fuse (12). The outer side of the hexagonal bolt (10) is slidably connected with a flat gasket (14), and the flat gasket (14) is in contact with the gasket (13). The outer side of the hexagonal bolt (10) is threadedly connected with a hexagonal nut (16), and the outer side of the hexagonal bolt (10) is provided with a spring gasket (15); The inner wall of the base (9) is provided with an insulating sleeve (28), the insulating sleeve (28) is in contact with the center rod (21), the outer side of the center rod (21) is provided with an insulator (27), the insulator (27) is in contact with the insulating sleeve (28), the outer side of the insulator (27) is provided with a moving contact assembly (17), the outer side of the insulator (27) is provided with a magnetic isolation sheet (24), the magnetic isolation sheet (24) is in contact with the moving contact assembly (17), the outer side of the insulator (27) is provided with a spring seat (18), the spring seat ( 18) is in contact with the magnetic isolation plate (24), a bowl pad (22) is arranged on the outer side of the center rod (21), a dynamic spring (19) is arranged on the outer side of the spring seat (18), a sealing ring (25) is arranged on the upper end of the static contact assembly (11), a cover (23) is arranged on the upper end of the sealing ring (25), a three-combination screw (36) is arranged between the cover (23) and the static contact assembly (11), and a hexagonal bolt (26) is arranged on the left side of the base (9), and the hexagonal bolt (26) passes through the static contact assembly (11).

2. A DC contactor according to claim 1, characterized in that: The lower end of the center rod (21) contacts a reaction spring (5), the reaction spring (5) passes through the second gasket (6), and the other end of the reaction spring (5) is welded to the first gasket (4).

3. A DC contactor according to claim 1, characterized in that: One end of the spring washer 1 (15) contacts the hexagonal nut 1 (16), and the other end of the spring washer 1 (15) contacts the flat washer 1 (14).

4. A DC contactor according to claim 1, characterized in that: The dynamic spring (19) is located outside the insulator (27) and the center rod (21), one end of the dynamic spring (19) is welded to the bowl pad (22), and the other end of the dynamic spring (19) is welded to the spring seat (18).

5. A DC contactor according to claim 1, characterized in that: A round head screw (31) is arranged between the base (9) and the static contact assembly (11); a connecting piece (32) is arranged on the outer side of the round head screw (31); the connecting piece (32) is in contact with the base (9); a flat washer (33) is arranged on the outer side of the round head screw (31); a hexagonal nut (35) is connected to the outer side of the round head screw (31) via a thread; a spring washer (34) is arranged on the outer side of the hexagonal nut (35); one end of the spring washer (34) is in contact with the hexagonal nut (35); and the other end of the spring washer (34) is in contact with the flat washer (33).

6. A DC contactor according to claim 1, characterized in that: The inner side wall of the hexagonal bolt (10) is fixedly connected to a guide piece (121); the outer side of the guide piece (121) is slidably sleeved with two symmetrically distributed moving pieces (122); each of the moving pieces (122) is slidably connected to the hexagonal bolt (10); a spring (123) is welded between the two moving pieces (122); the end surface of each moving piece (122) close to the square fuse (12) is fixedly connected to a limiting block (124); the limiting block (124) is slidably connected to the hexagonal bolt (10); and the limiting block (124) is slidably connected to the square fuse (12).

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