A movable contact structure of a direct current contactor

Abstract

The utility model discloses a movable contact structure of direct current contactor belongs to direct current contactor technical field, including the casing, the below of casing inside is provided with magnetization mechanism, and one end fixedly connected with movable contact seat is arranged on the top of magnetization mechanism, and the both ends of movable contact seat are inserted with movable contact holder, and the top of movable contact holder is provided with movable contact body, and the both ends of casing inside top are provided with fixed contact, and the middle of casing inside top is provided with insulating ring cover, and movable contact seat and movable contact holder are fixed through connecting assembly, and the fixed assembly is arranged between movable contact holder and movable contact body, the utility model discloses setting connecting assembly, can conveniently carry out quick dismounting between movable contact holder and magnetization mechanism, and this structure is convenient to use, and compared with the mode of insertion and dismounting, the stability is higher, the utility model sets up fixed assembly, and can conveniently carry out dismounting between movable contact body and movable contact holder.

Description

Technical Field

[0001] This utility model belongs to the field of DC contactor technology, specifically relating to a moving contact structure of a DC contactor. Background Technology

[0002] A DC contactor is a contactor whose core is controlled by a DC coil. Its load can be DC or AC. The core of a DC contactor is different from that of an AC contactor. It does not have eddy currents, so it is generally made of mild steel or industrial pure iron in a round shape.

[0003] In order to solve the problem of wear or dust accumulation on the moving contact due to electric arc, the moving contact of the existing DC contactor is designed to be detachable for easy replacement and maintenance. However, the installation and fixation is not stable enough due to the plug-in method. Moreover, it is not convenient to disassemble and install the moving contact separately during use. Utility Model Content

[0004] To address the problems mentioned in the background section, this invention provides a moving contact structure for a DC contactor, which is characterized by easy assembly and disassembly of the moving contact, convenient use, and practical structure.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a moving contact structure for a DC contactor, comprising a housing, a magnetizing mechanism disposed at the lower part of the housing, a movable contact seat fixedly connected to one end of the magnetizing mechanism, movable contact frames inserted into both ends of the movable contact seat, a moving contact body disposed above the movable contact frames, fixed contacts disposed at both ends of the upper part of the housing, an insulating ring disposed in the middle of the upper part of the housing, the movable contact seat and the movable contact frame being fixed by a connecting component, and a fixing component being disposed between the movable contact frame and the moving contact body.

[0006] Preferably, the connecting assembly includes a support base, a limiting plate, a pressing plate, a limiting spring, and an ejection assembly. The support base is fixedly connected to one side of the movable contact base, a limiting plate is slidably connected to the middle of the support base, one side of the limiting plate is slidably connected to the movable contact base, a pressing plate is fixedly connected to the lower side of one side of the limiting plate, a limiting spring is fixedly connected to the upper side of the pressing plate, and the upper side of the limiting spring is fixedly connected to the support base. An ejection assembly is provided on one side of the movable contact frame located inside the movable contact base.

[0007] Preferably, the ejection assembly includes an ejection plate, an ejection spring, and a stabilizing telescopic rod. The ejection plate abuts against one side of the movable contact frame located inside the movable contact seat. The stabilizing telescopic rod is fixedly connected to both ends of one side of the ejection plate. The other end of the stabilizing telescopic rod is fixedly connected to the movable contact seat. The ejection spring is fixedly connected to the middle of one side of the ejection plate. The other end of the ejection spring is fixedly connected to the movable contact seat.

[0008] Preferably, the upper sides of the limiting plate are symmetrically and fixedly connected with support blocks, the lower sides of the support blocks are fixedly connected with stabilizing slide rods, the stabilizing slide rods are slidably connected with the support base, and the lower sides of the stabilizing slide rods are fixedly connected with stop blocks.

[0009] Preferably, the fixing assembly includes a fixing seat, a fastening screw, a cylindrical rubber fastening block, and a rotating block. The fixing seat is fixedly connected to the upper part of the movable contact frame, the movable contact body is tightly inserted into the interior of the fixing seat, and the middle of the lower part of the movable contact body is in close contact with the movable contact frame. One end of the fixing seat is threadedly connected to the fastening screw, and one end of the fastening screw is fixedly connected to the cylindrical rubber fastening block. One side of the cylindrical rubber fastening block is in close contact with the movable contact body, and the cylindrical rubber fastening block and the fixing seat are in close sliding connection. The other end of the fastening screw is fixedly connected to the rotating block.

[0010] Preferably, the fixed base has a groove inside that matches the cylindrical rubber fastening block, and the surface of the rotating block is surrounded and fixedly connected with anti-slip strips.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. This utility model achieves the effect of quick assembly and disassembly between the moving contact frame and the magnetization mechanism by setting a connecting component. This structure is easy to use and has higher stability compared to the plug-in assembly and disassembly method.

[0013] 2. By setting a fixing component, this utility model achieves the effect of conveniently assembling and disassembling the moving contact body and the moving contact frame. In use, by rotating the rotating block, the cylindrical rubber fastener is released from its limiting position on the moving contact body, and it can be removed. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0016] Figure 3 This is a schematic diagram of the structure of the moving contact body of this utility model;

[0017] Figure 4 This is a schematic diagram of the structure of the connecting component of this utility model;

[0018] Figure 5 This is a schematic diagram of the ejection assembly of this utility model;

[0019] Figure 6 This is a schematic diagram of the structure of the fixing component of this utility model.

[0020] In the diagram: 1. Housing; 2. Magnetizing mechanism; 3. Movable contact seat; 4. Movable contact frame; 5. Moving contact body; 6. Fixed contact; 7. Insulating ring; 8. Connecting assembly; 81. Support base; 82. Limiting plate; 83. Pressing plate; 84. Limiting spring; 85. Support block; 86. Stabilizing slide rod; 87. Stop block; 88. Ejection assembly; 881. Ejection plate; 882. Ejection spring; 883. Stabilizing telescopic rod; 9. Fixing assembly; 91. Fixing base; 92. Fastening screw; 93. Cylindrical rubber fastening block; 94. Rotating block; 95. Anti-slip strip. Detailed Implementation

[0021] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Example 1

[0023] Please see Figure 1-6 The present invention provides the following technical solution: a moving contact structure of a DC contactor, including a housing 1, a magnetizing mechanism 2 is provided at the lower part of the housing 1, a movable contact seat 3 is fixedly connected to one end of the magnetizing mechanism 2, movable contact frames 4 are inserted into both ends of the movable contact seat 3, a moving contact body 5 is provided above the movable contact frame 4, fixed contacts 6 are provided at both ends of the upper part of the housing 1, an insulating ring 7 is provided in the middle of the upper part of the housing 1, the movable contact seat 3 and the movable contact frame 4 are fixed by a connecting component 8, and a fixing component 9 is provided between the movable contact frame 4 and the moving contact body 5.

[0024] Specifically, the connecting assembly 8 includes a support base 81, a limiting plate 82, a pressing plate 83, a limiting spring 84, and an ejection assembly 88. The support base 81 is fixedly connected to one side of the movable contact base 3. The limiting plate 82 is slidably connected to the middle of the support base 81. One side of the limiting plate 82 is slidably connected to the movable contact base 3. The pressing plate 83 is fixedly connected to the lower side of one side of the limiting plate 82. The limiting spring 84 is fixedly connected to the upper side of the pressing plate 83. The upper side of the limiting spring 84 is fixedly connected to the support base 81. The ejection assembly 88 is provided on one side of the movable contact frame 4 located inside the movable contact base 3.

[0025] By adopting the above technical solution, by pressing the pressing plate 83, the pressing plate 83 stretches the limiting spring 84, and at the same time drives the limiting plate 82 to move down, so that it separates from one side of the movable contact frame 4, thereby releasing the limitation on the movable contact frame 4, and then the movable contact frame 4 can be taken out from the movable contact seat 3.

[0026] Specifically, the ejection assembly 88 includes an ejection plate 881, an ejection spring 882, and a stabilizing telescopic rod 883. The movable contact frame 4 is located inside the movable contact seat 3 and abuts against the ejection plate 881 on one side. The stabilizing telescopic rod 883 is fixedly connected to both ends of one side of the ejection plate 881. The other end of the stabilizing telescopic rod 883 is fixedly connected to the movable contact seat 3. The ejection spring 882 is fixedly connected to the middle of one side of the ejection plate 881. The other end of the ejection spring 882 is fixedly connected to the movable contact seat 3.

[0027] By adopting the above technical solution, after the limiting plate 82 releases the limiting of the movable contact frame 4, the compressed ejection spring 882 resets, driving the ejection plate 881 to move outward, thereby automatically pushing the movable contact frame 4 outward, stabilizing the telescopic rod 883, and facilitating the stable movement of the ejection plate 881.

[0028] Specifically, support blocks 85 are symmetrically and fixedly connected to the upper sides of the limiting plate 82, and a stabilizing slide rod 86 is fixedly connected to the lower side of the support block 85. The stabilizing slide rod 86 is slidably connected to the support base 81, and a stop block 87 is fixedly connected to the lower side of the stabilizing slide rod 86.

[0029] By adopting the above technical solution, the stabilizing slide bar 86 facilitates the stable movement of the limiting plate 82.

[0030] In this embodiment, when the pressing plate 83 is pressed, the pressing plate 83 stretches the limiting spring 84, and at the same time drives the limiting plate 82 to move down, separating it from one side of the movable contact frame 4, thereby releasing the limitation on the movable contact frame 4. Then the movable contact frame 4 can be taken out from the movable contact seat 3. After the limiting plate 82 releases the limitation on the movable contact frame 4, the compressed ejection spring 882 resets, driving the ejection plate 881 to move outward, thereby automatically pushing the movable contact frame 4 outward, stabilizing the telescopic rod 883, and facilitating the stable movement of the ejection plate 881. This allows the movable contact frame 4 to be easily disassembled and assembled during use.

[0031] Example 2

[0032] The difference between this embodiment and embodiment 1 is that, specifically, the fixing component 9 includes a fixing seat 91, a fastening screw 92, a cylindrical rubber fastening block 93, and a rotating block 94. The fixing seat 91 is fixedly connected to the upper part of the movable contact frame 4. The movable contact body 5 is tightly inserted into the interior of the fixing seat 91, and the middle part of the lower part of the movable contact body 5 is in close contact with the movable contact frame 4. One end of the fixing seat 91 is threadedly connected to the fastening screw 92, and one end of the fastening screw 92 is fixedly connected to the cylindrical rubber fastening block 93. One side of the cylindrical rubber fastening block 93 is in close contact with the movable contact body 5. The cylindrical rubber fastening block 93 and the fixing seat 91 are in close sliding contact. The other end of the fastening screw 92 is fixedly connected to the rotating block 94.

[0033] By adopting the above technical solution, by turning the rotating block 94, the rotating block 94 drives the fastening screw 92 to rotate, and the rotation of the fastening screw 92 drives the cylindrical rubber fastening block 93 to move, thereby releasing it from the limit on the moving contact body 5, and then it can be taken out from the fixed seat 91 for maintenance and replacement.

[0034] Specifically, the interior of the fixed base 91 is provided with a groove that matches the cylindrical rubber fastening block 93, and the surface of the rotating block 94 is surrounded and fixedly connected with an anti-slip strip 95.

[0035] By adopting the above technical solution, the groove facilitates the sliding of the cylindrical rubber fastening block 93 in the fixed seat 91, and the anti-slip strip 95 provides an anti-slip effect, making it easy to rotate the rotating block 94.

[0036] In this embodiment, when the rotating block 94 is turned, the rotating block 94 drives the fastening screw 92 to rotate. The rotation of the fastening screw 92 drives the cylindrical rubber fastening block 93 to move, thereby releasing it from the limit on the moving contact body 5. Then it can be taken out from the fixed seat 91 for maintenance and replacement. This allows the device to be easily disassembled and replaced between the moving contact body 5 and the movable contact frame 4 during use.

[0037] The structure and operating principle of the housing 1, magnetizing mechanism 2, movable contact seat 3, movable contact frame 4, moving contact body 5, fixed contact 6, and insulating ring 7 in this utility model have been disclosed in the movable contact structure of a DC contactor disclosed in Chinese patent application number 202323552880.7. Its working principle is as follows: the magnetizing mechanism 2 includes an armature coil, a magnetic yoke coil, a push rod, a first spring, a limit seat, a second spring, and a support plate; in use, when the moving contact body 5 is damaged and cannot be energized normally, the flip plate is opened first, and then the movable contact frame 4 and the moving contact body 5 are removed and replaced.

[0038] The working principle and usage process of this utility model are as follows: When the moving contact body 5 is damaged and cannot be energized normally, firstly, the flip plate is opened, and then the movable contact frame 4 and the moving contact body 5 are removed through the connecting assembly 8. Then, the movable moving contact body 5 is removed through the fixing assembly 9 and disassembled and installed separately. When using the connecting assembly 8, by pressing the pressing plate 83, the pressing plate 83 stretches the limiting spring 84, and at the same time, it drives the limiting plate 82 to move down, separating it from one side of the movable contact frame 4, thereby releasing the limitation on the movable contact frame 4. Then, the movable contact frame 4 can be taken out from the movable contact seat 3. After the limiting plate 82 releases the limitation on the movable contact frame 4, the pressing plate 82 can be removed. When the retracted ejector spring 882 returns to its original position, it causes the ejector plate 881 to move outward, thereby automatically pushing the movable contact frame 4 outward and stabilizing the telescopic rod 883. This facilitates the stable movement of the ejector plate 881, allowing the movable contact frame 4 to be easily disassembled and assembled during use. When using the fixing component 9, by turning the rotating block 94, the rotating block 94 drives the fastening screw 92 to rotate. The rotation of the fastening screw 92 drives the cylindrical rubber fastening block 93 to move, thereby releasing it from the limit on the moving contact body 5. Then it can be removed from the fixing seat 91 for maintenance and replacement. This allows the moving contact body 5 and the movable contact frame 4 to be easily disassembled and replaced individually during use.

[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A moving contact structure for a DC contactor, comprising a housing (1), wherein a magnetizing mechanism (2) is disposed at the lower part of the housing (1), a movable contact seat (3) is fixedly connected to one end of the magnetizing mechanism (2), movable contact frames (4) are inserted into both ends of the movable contact seat (3), a moving contact body (5) is disposed above the movable contact frames (4), fixed contacts (6) are disposed at both ends of the upper part of the housing (1), and an insulating ring (7) is disposed in the middle of the upper part of the housing (1), characterized in that: The movable contact seat (3) and the movable contact frame (4) are fixed by a connecting component (8), and a fixing component (9) is provided between the movable contact frame (4) and the movable contact body (5).

2. The moving contact structure of a DC contactor according to claim 1, characterized in that: The connecting assembly (8) includes a support base (81), a limiting plate (82), a pressing plate (83), a limiting spring (84), and an ejection assembly (88). The support base (81) is fixedly connected to one side of the movable contact base (3). The limiting plate (82) is slidably connected to the middle of the support base (81). One side of the limiting plate (82) is slidably connected to the movable contact base (3). The pressing plate (83) is fixedly connected to the lower side of one side of the limiting plate (82). The limiting spring (84) is fixedly connected to the upper side of the pressing plate (83). The upper side of the limiting spring (84) is fixedly connected to the support base (81). The ejection assembly (88) is provided on one side of the movable contact frame (4) located inside the movable contact base (3).

3. The moving contact structure of a DC contactor according to claim 2, characterized in that: The ejection assembly (88) includes an ejection plate (881), an ejection spring (882), and a stabilizing telescopic rod (883). The movable contact frame (4) is located inside the movable contact seat (3) and abuts against the ejection plate (881) on one side. The stabilizing telescopic rod (883) is fixedly connected to both ends of one side of the ejection plate (881). The other end of the stabilizing telescopic rod (883) is fixedly connected to the movable contact seat (3). The ejection spring (882) is fixedly connected to the middle of one side of the ejection plate (881). The other end of the ejection spring (882) is fixedly connected to the movable contact seat (3).

4. The moving contact structure of a DC contactor according to claim 2, characterized in that: The upper sides of the limiting plate (82) are symmetrically and fixedly connected with support blocks (85), and the lower sides of the support blocks (85) are fixedly connected with stabilizing slide rods (86). The stabilizing slide rods (86) and the support base (81) are slidably connected, and the lower sides of the stabilizing slide rods (86) are fixedly connected with stop blocks (87).

5. The moving contact structure of a DC contactor according to claim 1, characterized in that: The fixing component (9) includes a fixing seat (91), a fastening screw (92), a cylindrical rubber fastening block (93), and a rotating block (94). The fixing seat (91) is fixedly connected to the upper part of the movable contact frame (4). The movable contact body (5) is tightly inserted into the interior of the fixing seat (91), and the middle part of the lower part of the movable contact body (5) is in close contact with the movable contact frame (4). One end of the fixing seat (91) is threadedly connected to the fastening screw (92). One end of the fastening screw (92) is fixedly connected to the cylindrical rubber fastening block (93). One side of the cylindrical rubber fastening block (93) is in close contact with the movable contact body (5). The cylindrical rubber fastening block (93) and the fixing seat (91) are in close contact and slidingly connected. The other end of the fastening screw (92) is fixedly connected to the rotating block (94).

6. The moving contact structure of a DC contactor according to claim 5, characterized in that: The fixed base (91) has a groove inside that matches the cylindrical rubber fastening block (93), and the surface of the rotating block (94) is surrounded and fixedly connected with anti-slip strips (95).

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