High stability double conversion dc contactor

Abstract

The utility model discloses a kind of high-stability duplex conversion DC contactors, including shell, multiple static contact pieces and moving contact pieces are arranged in the shell, the static contact piece is connected with corresponding binding post, characterized by: the middle part of the moving contact piece is threaded over push rod, one side of corresponding moving contact piece is provided with first gasket, first elastic member is tightly arranged between the first gasket and the inner wall of shell, the other side of corresponding moving contact piece is provided with second gasket, second elastic member is tightly arranged between the second gasket and push rod, first gasket, second gasket and push rod are all of metal material, one end of the push rod is provided with insulating sleeve, the insulating sleeve is threaded through magnetic conducting plate and abuts with moving iron core in electromagnetic coil component.The utility model is simple in structure, reasonable in design, can effectively improve the electrical performance of product, and ensure the stability of product operation.

Description

Technical Field

[0001] This utility model relates to electrical switches, specifically to a high-stability double-gang DC contactor. Background Technology

[0002] Double-gang DC contactors are mainly used to achieve bidirectional switching of DC circuits or automatic switching between dual power supplies. Due to the application scenarios and environmental requirements, there are certain electrical insulation requirements between the moving contact assembly and the electromagnetic assembly in the load component. Therefore, the push rod in the moving contact assembly needs to be designed as an insulating material or a metal material, and then the moving contact and push rod are insulated with insulating material to ensure the electrical insulation requirements between the moving contact and the magnetic component. Otherwise, the electromagnetic component and the aluminum casing will become electrified, causing chaos in the overall control circuit and safety hazards. However, the drawback of these two solutions is that when the product is operating under high current load, the high temperature of the moving contact can cause the push rod or other non-metallic insulating materials to soften, carbonize, or break, causing product failure and affecting the product's electrical performance. Utility Model Content

[0003] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is to provide a highly stable double-connector DC contactor for solving the above-mentioned problems.

[0004] Therefore, this utility model is implemented using the following solution: A high-stability double-gang DC contactor includes a housing, within which multiple stationary and moving contacts are disposed. The stationary contacts are connected to corresponding terminals. The moving contacts are characterized by: a push rod passing through the center of each moving contact; a first washer on one side of the moving contact; a first elastic element pressed between the first washer and the inner wall of the housing; a second washer on the other side of the moving contact; a second elastic element pressed between the second washer and the push rod; the first washer, the second washer, and the push rod are all made of metal; an insulating sleeve is provided at one end of the push rod, passing through a magnetic plate and abutting against the moving iron core within the electromagnetic coil assembly.

[0005] Both the first elastic element and the second elastic element are springs.

[0006] The outer wall of the push rod extends to provide a first step, and the second elastic element is pressed tightly between the second washer and the first step.

[0007] The outer wall of the insulating sleeve extends to provide a second step, which is located between the first step and the magnetic plate, and the second step is larger than the first step.

[0008] One end of the push rod extends to be provided with a sleeve post, on which a third washer and a guide sleeve are fitted. The first elastic element is placed on the third washer, and one end of the first elastic element is fitted outside the guide sleeve.

[0009] The aforementioned technical solution provides a high-stability double-gang DC contactor where the first and second gaskets, as well as the push rod, which contact the moving contact, are all made of metal. This effectively prevents component damage caused by high temperatures during operation under load, thus improving the product's electrical performance. Simultaneously, an insulating sleeve is installed at one end of the push rod to abut against the moving iron core within the electromagnetic coil assembly. This effectively insulates the moving contact from the electromagnetic coil assembly. Furthermore, because the insulating sleeve does not directly contact the moving contact and the distance between them is relatively large, it is not susceptible to damage from high temperatures, ensuring the stability of product operation. Attached Figure Description

[0010] The present invention includes the following figures: Figure 1 This is a diagram of the external structure of the present invention; Figure 2 for Figure 1 A view with part of the outer shell removed; Figure 3 This is a cross-sectional view of the present invention; Figure 4 for Figure 3 A magnified view of the area pointed to by A in the middle. Detailed Implementation

[0011] As shown in the figure, the present invention discloses a high-stability double-connector DC contactor, including a housing 1. Multiple stationary contacts 3 and moving contacts 4 are disposed inside the housing 1. The stationary contacts 3 are connected to corresponding terminals 2. A push rod 12 passes through the middle of the moving contact 4. A first gasket 9 is disposed on one side of the moving contact 4. A first elastic element 6 is pressed tightly between the first gasket 9 and the inner wall of the housing 1. A second gasket 11 is disposed on the other side of the moving contact 4. A second elastic element 13 is pressed tightly between the second gasket 11 and the push rod 12. The first gasket 9, the second gasket 11, and the push rod 12 are all made of metal. An insulating sleeve 14 is disposed at one end of the push rod 12. The insulating sleeve 14 passes through a magnetic plate 18 and abuts against the moving iron core 15 inside the electromagnetic coil assembly 5.

[0012] Furthermore, both the first elastic element 6 and the second elastic element 13 are springs.

[0013] Furthermore, the first elastic element 6 is placed on the third gasket 8, and the first elastic element 6 is tightly pressed between the third gasket 8 and the inner wall of the outer casing 1; the outer side wall of the push rod 12 extends to provide a first step 17, and the second elastic element 13 is tightly pressed between the second gasket 11 and the first step 17. With the above structure, it is ensured that the moving contact piece can be elastically pressed, ensuring that the moving contact piece 4 can be stably pressed onto the stationary contact piece 3.

[0014] Furthermore, the outer wall of the insulating sleeve 14 extends to form a second step 16, which is located between the first step 17 and the magnetic plate 18, and the second step 16 is larger than the first step 17. This structure ensures that the push rod 12 and its first step 17 will not contact the magnetic plate 18 or the moving iron core 15, thus ensuring insulation between the magnetic plate 18, the moving iron core 15, and the push rod 12.

[0015] Furthermore, a sleeve post 10 extends from one end of the push rod 12. A third washer 8 and a guide sleeve 7 are fitted onto the sleeve post 10. The first elastic element 6 is placed on the third washer 8, and one end of the first elastic element 6 is fitted onto the guide sleeve 7. During production, the guide sleeve 7, the third washer 8, and the first washer 9 are fixed to the sleeve post 10 using welding or riveting processes, making the push rod 12 and the moving contact piece 4 a single integrated assembly. With the above structure, the movement of the first elastic element 6 can be guided by the guide sleeve 7, ensuring the stability of its movement.

[0016] This invention features a structure in which the first gasket 9, the second gasket 11, and the push rod 12, which contact the moving contact 4, are all made of metal. This effectively prevents component damage caused by high temperatures during product operation, thus improving the product's electrical performance. Simultaneously, an insulating sleeve 14 is provided at one end of the push rod 12 to abut against the moving iron core 15 within the electromagnetic coil assembly. This effectively insulates the moving contact 4 from the electromagnetic coil assembly. Furthermore, since the insulating sleeve 14 does not directly contact the moving contact 4, and the distance between them is relatively large, it will not be damaged by high temperatures, ensuring the stability of product operation.

Claims

1. A high-stability double-gang DC contactor, comprising a housing (1), wherein a plurality of stationary contacts (3) and moving contacts (4) are disposed within the housing (1), wherein the stationary contacts (3) are connected to corresponding terminals (2), characterized in that: The push rod (12) passes through the middle of the movable contact (4). A first gasket (9) is provided on one side of the movable contact (4). A first elastic element (6) is pressed tightly between the first gasket (9) and the inner wall of the outer shell (1). A second gasket (11) is provided on the other side of the movable contact (4). A second elastic element (13) is pressed tightly between the second gasket (11) and the push rod (12). The first gasket (9), the second gasket (11) and the push rod (12) are all made of metal. An insulating sleeve (14) is provided at one end of the push rod (12). The insulating sleeve (14) passes through the magnetic plate (18) and abuts against the moving iron core (15) in the electromagnetic coil assembly (5).

2. The high-stability double-gang DC contactor according to claim 1, characterized in that: Both the first elastic element (6) and the second elastic element (13) are springs.

3. The high-stability double-gang DC contactor according to claim 1, characterized in that: The outer wall of the push rod (12) is provided with a first step (17), and the second elastic element (13) is pressed tightly between the second gasket (11) and the first step (17).

4. A high-stability double-gang DC contactor according to claim 3, characterized in that: The outer wall of the insulating sleeve (14) extends to provide a second step (16), which is located between the first step (17) and the magnetic plate (18), and the second step (16) is larger than the first step (17).

5. A high-stability double-gang DC contactor according to claim 1, characterized in that: One end of the push rod (12) extends to provide a sleeve post (10), on which a third gasket (8) and a guide sleeve (7) are sleeved. The first elastic element (6) is placed on the third gasket (8), and one end of the first elastic element (6) is sleeved outside the guide sleeve (7).

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