Quick opening contactor structure

Abstract

The utility model relates to a quick opening contactor structure, which comprises a reverse spring bracket, the number of the first rotating arms is two, and the first rotating arms are obliquely and symmetrically hinged to the same reverse spring support. The second rotating arm is nested at the other end of the first rotating arm, and the lower end of the second rotating arm is detachably and rotatably arranged on the lower base; the spring is arranged in the second rotating arm and abuts against the first rotating arm and the second rotating arm. The movable support assembly is located at the upper ends of the two reverse spring supports and rapidly moves upwards under the counter-acting force of the reverse spring supports after the external force is lost. According to the utility model, the structure is compact and reasonable, the operation is convenient, through the special structural design of the reverse spring assembly, the counter-acting force of the spring is increased, the opening time of the contactor is shortened, the arcing time of the moving and static contacts is reduced, the electrical ablation of the contacts is reduced, and the service life of the whole machine is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of contactors, in particular to a fast-opening contactor structure. Background Art

[0002] AC contactor is a switch device widely used in low-voltage electrical circuit control and protection. It is responsible for the frequent closing and opening operations of large current and main circuit of electrical circuit. When the coil loses power, the contactor will open for a long time, which will increase the arcing time of the moving and static contacts under high current, increase the contact temperature, and cause serious electrical erosion of the contacts, thus affecting the service life of the contactor.

[0003] In order to improve the service life of the contactor, a contactor structure with fast opening is designed. Utility Model Content

[0004] In view of the shortcomings of the above-mentioned existing production technology, the applicant provides a contactor structure with fast opening, which shortens the contactor opening time, reduces the arcing time of the moving and static contacts, reduces the electrical erosion of the contacts, and increases the service life of the whole machine.

[0005] The technical solution adopted by the utility model is as follows:

[0006] A fast-opening contactor structure, comprising:

[0007] a lower base having a cavity disposed therein;

[0008] The anti-spring assembly is two in number and symmetrically arranged in the lower base, and its structure includes:

[0009] Anti-spring bracket;

[0010] Rotating arms 1, which are two in number and are obliquely symmetrically hinged on the same anti-spring bracket;

[0011] The second rotating arm is nested in the other end of the first rotating arm, and the lower end of the second rotating arm can be detachably rotated on the lower base;

[0012] A spring, which is arranged in the second rotating arm and respectively abuts against the first rotating arm and the second rotating arm;

[0013] The movable bracket assembly is located at the upper ends of the two anti-spring brackets and moves upward rapidly under the reaction force of the anti-spring brackets after the external force is lost.

[0014] Furthermore, it also includes:

[0015] An upper base, which is fixedly connected to the upper side wall of the lower base, and is provided with a through hole for the movable bracket assembly to pass through;

[0016] A coil assembly is fixed in the lower base, and a plurality of stationary contact assemblies are arranged on the coil assembly, and a stationary iron core is arranged in the stationary contact assembly;

[0017] The movable bracket assembly is connected with a moving contact assembly, and a moving iron core is arranged inside the moving contact assembly.

[0018] Furthermore, the lower end of the lower base is connected to a bottom plate, and the upper end of the upper base is connected to an upper cover assembly.

[0019] Furthermore, a spherical end portion is provided at the lower end of the second rotating arm, and a rotating groove corresponding to the spherical end portion is provided on the lower base.

[0020] Furthermore, a limiting frame is arranged on the lower base directly below the anti-spring bracket.

[0021] Furthermore, a positioning contact embedded in the movable bracket assembly is provided at the upper end of the anti-spring bracket.

[0022] Furthermore, the anti-spring bracket, the first rotating arm and the second rotating arm are all made of high temperature resistant insulating materials.

[0023] Furthermore, the inclination angle between the rotating arm 1 and the horizontal plane is less than 60°.

[0024] The beneficial effects of the utility model are as follows:

[0025] The utility model has a compact and reasonable structure and is easy to operate. Through the special structural design of the anti-spring component, the reaction force of the spring is increased, the opening time of the contactor is shortened, the arcing time of the moving and static contacts is reduced, the electrical ablation of the contacts is reduced, and the service life of the whole machine is prolonged.

[0026] At the same time, the utility model also has the following advantages:

[0027] (1) Under the action of gravity of the movable bracket assembly, the second rotating arm and the lower base are relatively stable. At the same time, since the second rotating arm and the lower base are not directly connected, it is convenient to replace components, especially the replacement of the wearing part spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is an exploded view of the utility model.

[0029] Figure 2 It is a schematic diagram of the connection structure between the lower base and the anti-spring assembly in the utility model.

[0030] Figure 3 It is the front view of the lower base in the utility model.

[0031] Figure 4 for Figure 3 Middle AA section view.

[0032] in:

[0033] 1. Upper cover assembly; 2. Moving contact assembly; 3. Movable bracket assembly; 4. Static contact assembly; 5. Upper base; 6. Lower base; 7. Anti-spring assembly; 8. Coil assembly; 9. Bottom plate;

[0034] 601, rotating groove; 602, limiting frame;

[0035] 701, anti-spring bracket; 702, rotating arm one; 703, rotating arm two; 704, spring; 705, positioning contact; 706, spherical end. DETAILED DESCRIPTION

[0036] The specific implementation of the present utility model is described below in conjunction with the accompanying drawings.

[0037] like Figure 1-Figure 4 As shown, the contactor structure of the fast opening of this embodiment includes:

[0038] a lower base 6, wherein a cavity is provided therein;

[0039] The counter spring assembly 7, which is two in number and symmetrically arranged in the lower base 6, has a structure including:

[0040] Anti-spring bracket 701;

[0041] There are two rotating arms 702 which are symmetrically hinged on the same anti-spring bracket 701;

[0042] The second rotating arm 703 is nested in the other end of the first rotating arm 702, and the lower end of the second rotating arm 703 can be detachably rotated on the lower base 6;

[0043] A spring 704, which is disposed in the second rotating arm 703 and respectively abuts against the first rotating arm 702 and the second rotating arm 703;

[0044] The movable bracket assembly 3 is located at the upper end of the two anti-spring brackets 701, and moves upward rapidly under the reaction force of the anti-spring brackets 701 after the external force is lost.

[0045] Through the special structural design of the anti-spring assembly 7, the reaction force of the spring 704 is increased, the contactor opening time is shortened, the arcing time of the moving and static contacts is reduced, the electrical ablation of the contacts is reduced, and the service life of the whole machine is improved.

[0046] like Figure 1 As shown, the contactor structure for rapid opening in this embodiment further includes:

[0047] The upper base 5 is fixedly connected to the upper side wall of the lower base 6, and the upper base 5 is provided with a through hole for the movable bracket assembly 3 to pass through;

[0048] A coil assembly 8 is fixed in the lower base 6, and a plurality of stationary contact assemblies 4 are arranged on the coil assembly 8, and a stationary iron core is arranged in the stationary contact assembly 4;

[0049] In this embodiment, the movable bracket assembly 3 is connected to the movable contact assembly 2 , and a moving iron core is arranged inside the movable contact assembly 2 .

[0050] In the fast opening contactor structure of this embodiment, the lower end of the lower base 6 is connected to the bottom plate 9, and the upper end of the upper base 5 is connected to the upper cover assembly 1.

[0051] like Figure 4 As shown, the lower end of the rotating arm 2 703 in this embodiment is provided with a spherical end 706, and a rotating groove 601 corresponding to the spherical end 706 is opened on the lower base 6. By setting the rotating groove 601, the rotating arm 2 703 can be easily rotated, and the positioning of the rotating arm 2 703 can also be achieved. Under the action of gravity of the movable bracket assembly 3, the rotating arm 2 703 and the lower base 6 are relatively stable. At the same time, since the rotating arm 2 703 and the lower base 6 are not directly connected, it is convenient to replace components, especially the replacement of the wearing part spring 704.

[0052] The lower base 6 in this embodiment is located directly below the anti-spring bracket 701 and is provided with a limit bracket 602 to avoid excessive descent, collision of the moving / static contact components, and also to avoid spring fatigue.

[0053] The upper end of the anti-spring bracket 701 in this embodiment is provided with a positioning contact 705 embedded in the movable bracket assembly 3 to achieve the positioning of the anti-spring bracket 701 and the movable bracket assembly 3 and ensure the stability of the entire device.

[0054] The anti-spring bracket 701, the rotating arm 1 702, and the rotating arm 2 703 in this embodiment are all made of high-temperature resistant insulating materials. In this embodiment, high-temperature resistant insulating plastics are used, which can ensure a certain strength.

[0055] The inclination angle of the rotating arm 702 in this embodiment to the horizontal plane is less than 60 degrees, and the preferred angle is 45 degrees. That is, at this angle, it can ensure that the moving and static contacts can make quick contact, and after losing magnetism, they can be quickly reset under the action of the spring 704.

[0056] The specific working principle is as follows:

[0057] 1) When the coil assembly 8 is energized, the current in the coil assembly 8 will generate a magnetic field, causing the static iron core on the coil assembly 8 to generate electromagnetic attraction to attract the moving iron core on the movable bracket assembly 3. The moving iron core drives the movable bracket assembly 3 to move downward, and the counter-spring assembly 7 is pressed down by the movable bracket assembly 3. At the same time, the movable bracket assembly 3 drives the moving contact assembly 2 to move downward, so that the moving contact assembly 2 and the static contact assembly 4 are closed and connected, and the main circuit of the contactor works.

[0058] 2) When the coil assembly 8 is powered off, the electromagnetic force of the coil assembly 8 disappears. In the absence of magnetic force, the movable bracket assembly 3 quickly pops up under the upward reaction force of the anti-spring assembly 7, and the moving contact assembly 2 and the static contact assembly 4 on the movable bracket assembly 3 pop away from each other, and the main circuit of the contactor is opened.

[0059] 3) The structural design of the anti-spring assembly 7 consists of two groups of anti-springs. The anti-spring bracket 701 and the rotating arm 1 702 are hingedly designed to be difficult to fall out after assembly. The rotating arm 1 702 and the rotating arm 2 703 are nested and combined, and the spring 704 is arranged in the rotating arm 1 702 and the rotating arm 2 703, which protects the spring 704 from bending and deformation during the force application process.

[0060] The structural design of this anti-spring assembly 7 is that after the electromagnetic force disappears, the spring 704 recovers its free length under the reaction force. After the two sets of reaction forces of the spring 704 are combined, the anti-spring bracket 701 is reset to allow the movable bracket assembly 3 to quickly pop open, and the moving contact assembly 2 and the static contact assembly 4 on the movable bracket assembly 3 pop open to each other, thereby realizing rapid opening of the contactor main circuit, and the opening speed is increased by 40%, which reduces the arcing time of the moving and static contacts, reduces the electrical erosion of the contacts, and improves the service life of the entire contactor.

[0061] The above description is an explanation of the utility model, not a limitation of the utility model. The scope of the utility model is defined by the claims. Any form of modification can be made within the protection scope of the utility model.

Claims

1. A contactor structure for rapid opening, characterized in that: include: A lower base (6) having a cavity therein; The counter-spring assembly (7) is two in number and symmetrically arranged in the lower base (6), and its structure comprises: a counter-spring bracket (701); Rotating arms 1 (702), which are two in number and are hinged to the same anti-spring bracket (701) in an oblique and symmetrical manner; The second rotating arm (703) is nested in the other end of the first rotating arm (702), and the lower end of the second rotating arm (703) can be detachably rotated on the lower base (6); A spring (704) is disposed in the second rotating arm (703) and respectively contacts the first rotating arm (702) and the second rotating arm (703); The movable support assembly (3) is located at the upper ends of the two anti-spring supports (701), and moves upward rapidly under the reaction force of the anti-spring supports (701) after the external force is lost.

2. A fast-opening contactor structure according to claim 1, characterized in that: Also includes: An upper base (5) is fixedly connected to the upper side wall of the lower base (6), and a through hole is provided on the upper base (5) for the movable bracket assembly (3) to pass through; A coil assembly (8) is fixed in the lower base (6), and a plurality of stationary contact assemblies (4) are arranged on the coil assembly (8), and a stationary iron core is arranged in the stationary contact assembly (4); The movable bracket assembly (3) is connected to a moving contact assembly (2), and a moving iron core is arranged inside the moving contact assembly (2).

3. A fast-opening contactor structure according to claim 2, characterized in that: The lower end of the lower base (6) is connected to a bottom plate (9), and the upper end of the upper base (5) is connected to an upper cover assembly (1).

4. A fast-opening contactor structure according to claim 1, characterized in that: The lower end of the second rotating arm (703) is provided with a spherical end (706), and a rotating groove (601) corresponding to the spherical end (706) is opened on the lower base (6).

5. A fast-opening contactor structure according to claim 1, characterized in that: The lower base (6) is provided with a limiting frame (602) located directly below the anti-spring bracket (701).

6. A fast-opening contactor structure according to claim 1, characterized in that: The upper end of the anti-spring bracket (701) is provided with a positioning contact (705) embedded in the movable bracket assembly (3).

7. A fast-opening contactor structure according to claim 1, characterized in that: The anti-spring bracket (701), the first rotating arm (702) and the second rotating arm (703) are all made of high temperature resistant insulating materials.

8. A fast-opening contactor structure according to claim 1, characterized in that: The inclination angle of the rotating arm 1 (702) to the horizontal plane is less than 60°.

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