Contact fixing structure of direct current contactor

Abstract

The utility model discloses a contact fixing structure of a direct current contactor, which comprises a direct current contactor body and a clamping rail, and further comprises an upper connecting structure and a lower connecting structure, the upper connecting structure comprises an upper L-shaped connecting plate, the direct current contactor body is connected with a plurality of connecting rods penetrating through the horizontal end of the upper L-shaped connecting plate through threads in a screwing manner, and the lower connecting structure comprises a lower L-shaped connecting plate. The upper end of the connecting rod is sleeved with a compression spring abutting against the horizontal end of the upper L-shaped connecting plate, and the lower connecting structure comprises a lower L-shaped connecting plate detachably connected with the direct current contactor body. According to the utility model, the lifting rod is lifted upwards to drive the upper L-shaped connecting plate to extrude the compression spring, then the lower L-shaped connecting plate is clamped with the lower end of the clamping rail from the bottom, the lifting rod is loosened, and the compression spring extrudes the upper L-shaped connecting plate to move downwards to the slot to be clamped at the top end of the clamping rail, so that the direct current contactor body is convenient to disassemble and assemble on the clamping rail; stable connection between the direct-current contactor and the contact is ensured, and normal operation of equipment is ensured.

Description

Technical Field

[0001] This utility model relates to the field of DC contactor technology, and in particular to a contact fixing structure for a DC contactor. Background Technology

[0002] A DC contactor is a contactor with a DC-controlled iron core. Its load can be DC or AC. Unlike AC contactors, the iron core of a DC contactor does not contain eddy currents, and therefore it is typically made of mild steel or industrial pure iron in a circular shape. Because the attraction coil of a DC contactor is powered by DC, there is no inrush starting current, and the iron core does not experience violent impact. Therefore, it has a long lifespan and is suitable for applications requiring frequent start-stop operations.

[0003] Currently, DC contactors are typically mounted onto rails via an integrally molded C-shaped retaining plate on their back, which is usually made of plastic. However, this mounting method presents some problems in practice: if it's necessary to remove the DC contactor located in the middle of the rail, there are generally two methods—one is to slide the contactor out entirely from one end of the rail, and the other is to pry the C-shaped retaining plate off the rail directly. The former method is inconvenient for contactors mounted in the middle of the rail, while the latter method is prone to causing the C-shaped retaining plate to break during repeated removal and installation. Once the retaining plate breaks, the connection between the DC contactor and the contacts becomes unstable, thus affecting the normal operation of the equipment. Utility Model Content

[0004] The purpose of this utility model is to provide a contact fixing structure for a DC contactor in order to solve the technical problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A contact fixing structure for a DC contactor includes a DC contactor body and a retaining rail, and further includes an upper connecting structure and a lower connecting structure arranged on the top and bottom sides of the back of the DC contactor body. The upper connecting structure includes an upper L-shaped connecting plate, a movable groove is formed on the top side of the back of the DC contactor body, the horizontal end of the upper L-shaped connecting plate is inserted into the movable groove, and a plurality of connecting rods passing through the horizontal end of the upper L-shaped connecting plate are threadedly connected to the DC contactor body. A compression spring is sleeved on the upper end of the connecting rod and abuts against the horizontal end of the upper L-shaped connecting plate. A slot for accommodating the retaining rail is formed at the bottom of the vertical end of the upper L-shaped connecting plate. The lower connecting structure includes a lower L-shaped connecting plate detachably connected to the DC contactor body, and the vertical end of the lower L-shaped connecting plate is engaged with the retaining rail.

[0007] As a further description of the above technical solution:

[0008] The slot has inwardly protruding metal springs fixedly connected to both sides, and the rail is inserted between the two sets of metal springs.

[0009] As a further description of the above technical solution:

[0010] A connecting groove is provided on the bottom side of the back of the DC contactor body. The horizontal end of the lower L-shaped connecting plate is inserted into the connecting groove. Several countersunk screws passing through the horizontal end of the lower L-shaped connecting plate are screwed onto the DC contactor body.

[0011] As a further description of the above technical solution:

[0012] The lower L-shaped connecting plate has a mounting groove on its horizontal end. A connecting shaft is detachably connected to the mounting groove. Several rollers are mounted on the connecting shaft and arranged along its axial direction. The bottom of the rail makes rolling contact with the surface of the rollers.

[0013] As a further description of the above technical solution:

[0014] The lower L-shaped connecting plate has U-shaped grooves at both ends of its horizontal end that communicate with the mounting groove. The two ends of the connecting shaft pass through the U-shaped grooves and have external threads at both ends. The ends of the connecting shaft are connected to a locking nut by threaded engagement.

[0015] As a further description of the above technical solution:

[0016] The top of the vertical end of the upper L-shaped connecting plate is fixedly connected to a lifting rod that extends out of the top of the DC contactor body.

[0017] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0018] 1. In this utility model, pulling the lifting rod upward causes the upper L-shaped connecting plate to compress the spring and move upward. Then, the lower L-shaped connecting plate is engaged with the lower end of the rail from below. After that, the back of the DC contactor body is pressed until it contacts the surface of the rail. Then, the lifting rod is released, and under the elastic force of the compression spring, the upper L-shaped connecting plate is pressed downward until the slot is engaged with the top of the rail. Compared with the conventional DC contactor body, this device facilitates the assembly and disassembly of the DC contactor body on the rail, and it is also easy to replace if the two sets of connection structures are damaged, ensuring a stable connection between the DC contactor and the contacts and ensuring the normal operation of the equipment.

[0019] 2. In this utility model, the bottom of the rail makes rolling contact with the surface of the roller. After the rail is disengaged from the slot by pulling the lifting rod upward, the horizontal position of the DC contactor body on the rail is easily adjusted under the action of the roller. Attached Figure Description

[0020] Figure 1A three-dimensional structural schematic diagram of a contact fixing structure of a DC contactor according to an embodiment of the present invention is shown;

[0021] Figure 2 A schematic diagram showing the connection between the DC contactor body and the rail according to an embodiment of the present invention is shown;

[0022] Figure 3 It shows Figure 2 An enlarged view at point A;

[0023] Figure 4 It shows Figure 2 An enlarged view at point B;

[0024] Figure 5 A schematic diagram of the upper L-shaped connecting plate according to an embodiment of the present utility model is shown;

[0025] Figure 6 A schematic diagram of the structure of the lower L-shaped connecting plate provided according to an embodiment of the present utility model is shown.

[0026] Legend:

[0027] 1. DC contactor body; 101. Movable slot; 102. Connecting slot; 2. Rail; 3. Upper connecting structure; 31. Upper L-shaped connecting plate; 3101. Slot; 32. Lifting rod; 33. Metal spring; 34. Connecting rod; 35. Compression spring; 4. Lower connecting structure; 41. Lower L-shaped connecting plate; 4101. Mounting slot; 42. Connecting shaft; 43. Roller; 44. Nut; 45. Countersunk screw. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0029] Please see Figure 1-6This utility model provides a technical solution: a contact fixing structure for a DC contactor, including a DC contactor body 1 and a rail 2, and an upper connecting structure 3 and a lower connecting structure 4 arranged on the top and bottom sides of the back of the DC contactor body 1. The upper connecting structure 3 includes an upper L-shaped connecting plate 31. A movable groove 101 is opened on the top side of the back of the DC contactor body 1. The horizontal end of the upper L-shaped connecting plate 31 is inserted into the movable groove 101. Several screw threads are threaded onto the DC contactor body 1, passing through the horizontal ends of the upper L-shaped connecting plate 31. The connecting rod 34 facilitates the replacement of the upper L-shaped connecting plate 32. The upper end of the connecting rod 34 is fitted with a compression spring 35 that abuts against the horizontal end of the upper L-shaped connecting plate 31. The bottom of the vertical end of the upper L-shaped connecting plate 31 is provided with a slot 3101 for accommodating the rail 2. The top of the vertical end of the upper L-shaped connecting plate 31 is fixedly connected with a lifting rod 32 extending out of the top of the DC contactor body 1. The lower connecting structure 4 includes a lower L-shaped connecting plate 41 that is detachably connected to the DC contactor body 1. The vertical end of the lower L-shaped connecting plate 41 is engaged with the rail 2. Pulling the lifting rod 32 upwards causes the upper L-shaped connecting plate 31 to compress the spring 35 and move upwards. Then, the lower L-shaped connecting plate 41 is engaged with the lower end of the rail 2 from below. After that, the back of the DC contactor body 1 is pressed until it contacts the surface of the rail 2. Then, the lifting rod 32 is released. Under the elastic force of the spring 35, the upper L-shaped connecting plate 31 is pressed downwards until the slot 3101 is engaged with the top of the rail 2. Compared with the conventional DC contactor body 1, this device facilitates the installation and removal of the DC contactor body 1 on the rail 2, and it is also easy to replace if the two sets of connection structures are damaged, ensuring a stable connection between the DC contactor and the contacts and ensuring the normal operation of the equipment.

[0030] Specifically, such as Figure 3 As shown, the slot 3101 has inwardly protruding metal springs 33 fixedly connected to both sides. The rail 2 is inserted between the two sets of metal springs 33. The metal springs 33 deform and exert a squeezing force on the rail 2, which improves the connection stability between the rail 2 and the upper L-shaped connecting plate 31.

[0031] Specifically, such as Figure 4 As shown, a connecting groove 102 is provided on the bottom side of the back of the DC contactor body 1. The horizontal end of the lower L-shaped connecting plate 41 is inserted into the connecting groove 102. Several countersunk screws 45 passing through the horizontal end of the lower L-shaped connecting plate 41 are threadedly connected to the DC contactor body 1, which facilitates the replacement of the lower L-shaped connecting plate 41.

[0032] Specifically, such as Figure 4 and Figure 6As shown, the lower L-shaped connecting plate 41 has a mounting groove 4101 on its horizontal end. A connecting shaft 42 is detachably connected in the mounting groove 4101. The lower L-shaped connecting plate 41 has U-shaped grooves at both ends of its horizontal end that communicate with the mounting groove 4101. The two ends of the connecting shaft 42 pass through the U-shaped grooves and have external threads at both ends. The ends of the connecting shaft 42 are connected to a locking nut 44 by threaded engagement, which facilitates the disassembly and assembly of the connecting shaft 42. Several rollers 43 are mounted on the connecting shaft 42 and arranged along its axial direction. The bottom of the rail 2 rolls in contact with the surface of the rollers 43. After the lifting rod 32 is pulled upward to disengage the rail 2 from the slot 3101, the horizontal position of the DC contactor body 1 on the rail 2 can be easily adjusted under the action of the rollers 43.

[0033] Working principle: In use, pull up the lifting rod 32 to move the upper L-shaped connecting plate 31 upward by squeezing the compression spring 35. Then, the lower L-shaped connecting plate 41 is engaged with the lower end of the rail 2 from below. After that, press the back of the DC contactor body 1 until it contacts the surface of the rail 2. Then, release the lifting rod 32. Under the elastic force of the compression spring 35, the upper L-shaped connecting plate 31 is squeezed downward until the slot 3101 is engaged with the top of the rail 2. In the slot 3101, the metal spring 33 deforms and exerts a squeezing force on the rail 2, which improves the connection stability between the rail 2 and the upper L-shaped connecting plate 31. Compared with the conventional DC contactor body 1, this device facilitates the installation and removal of the DC contactor body 1 on the rail 2, and it is also easy to replace if the two sets of connection structures are damaged, ensuring the stable connection between the DC contactor and the contacts and ensuring the normal operation of the equipment.

[0034] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A contact fixing structure for a DC contactor, comprising a DC contactor body (1) and a rail (2), characterized in that, It also includes an upper connection structure (3) and a lower connection structure (4) arranged on the top and bottom sides of the back of the DC contactor body (1). The upper connection structure (3) includes an upper L-shaped connection plate (31). A movable groove (101) is provided on the top side of the back of the DC contactor body (1). The horizontal end of the upper L-shaped connection plate (31) is inserted into the movable groove (101). Several connecting rods (34) passing through the horizontal end of the upper L-shaped connection plate (31) are connected to the DC contactor body (1) by screw thread. A compression spring (35) is sleeved on the upper end of the connecting rod (34) and abuts against the horizontal end of the upper L-shaped connection plate (31). A slot (3101) for accommodating the rail (2) is provided at the bottom of the vertical end of the upper L-shaped connection plate (31). The lower connection structure (4) includes a lower L-shaped connection plate (41) that is detachably connected to the DC contactor body (1). The vertical end of the lower L-shaped connection plate (41) is engaged with the rail (2).

2. The contact fixing structure of a DC contactor according to claim 1, characterized in that, The slot (3101) has inwardly protruding metal springs (33) fixedly connected to both sides, and the rail (2) is inserted between the two sets of metal springs (33).

3. The contact fixing structure of a DC contactor according to claim 2, characterized in that, The DC contactor body (1) has a connecting groove (102) on the bottom side of the back side. The horizontal end of the lower L-shaped connecting plate (41) is inserted into the connecting groove (102). The DC contactor body (1) is connected by a number of countersunk screws (45) that pass through the horizontal end of the lower L-shaped connecting plate (41) through the thread.

4. The contact fixing structure of a DC contactor according to claim 3, characterized in that, The lower L-shaped connecting plate (41) has an installation groove (4101) on its horizontal end. A connecting shaft (42) is detachably connected in the installation groove (4101). Several rollers (43) arranged along its axial direction are installed on the connecting shaft (42). The bottom of the rail (2) makes rolling contact with the surface of the rollers (43).

5. The contact fixing structure of a DC contactor according to claim 4, characterized in that, The lower L-shaped connecting plate (41) has U-shaped grooves at both ends of its horizontal end that communicate with the mounting groove (4101). The connecting shaft (42) passes through the U-shaped grooves at both ends and has external threads at both ends. The end of the connecting shaft (42) is connected to a locking nut (44) by thread engagement.

6. The contact fixing structure of a DC contactor according to claim 5, characterized in that, The top of the vertical end of the upper L-shaped connecting plate (31) is fixedly connected to a lifting rod (32) that extends out of the top of the DC contactor body (1).

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