Alternating current contactor with surge suppression function

Abstract

The utility model relates to an alternating current contactor with a surge suppression function, which comprises a shell, a contact system and an electromagnetic system, the contact system comprises a moving contact frame, a plurality of moving contact bridges, a plurality of static contacts and a plurality of main circuit wiring terminals, and a surge suppression wiring assembly electrically connected with the main circuit wiring terminals is arranged on the shell. The surge suppression wiring assembly comprises an insulation wiring seat, a plurality of first wiring terminals, an insulation cover, a plurality of second wiring terminals, a plurality of conducting strips, and a plurality of resistance wires connected between the plurality of first wiring terminals and the plurality of second wiring terminals respectively, one end of each conducting strip is provided with a plug-in piece matched with the plurality of main circuit wiring terminals, and the other end of each conducting strip is provided with a plug-in piece matched with the plurality of main circuit wiring terminals. The plugging sheets of the plurality of conductive sheets are inserted into the plurality of main circuit wiring terminals. The utility model has the advantages of simple structure, stable and reliable performance, high assembly efficiency and long service life.

Description

Technical Field

[0001] The utility model relates to an AC contactor, in particular to an AC contactor with a surge suppression function. Background Art

[0002] The working principle of the AC contactor is to use the electromagnetic force and the spring force to achieve the connection and disconnection of the contacts. The AC contactor has two working states: de-energized state (released state) and energized state (operated state). When the attraction coil is energized, the static iron core generates electromagnetic attraction, the armature is attracted, and the connecting rod connected to the armature drives the contact bridge to move, so that the normally closed contact is disconnected and the contactor is in the energized state; when the attraction coil is de-energized, the electromagnetic attraction disappears, the armature is reopened, the normally open contact is closed, and the position spring is released, all contacts are reset, and the contactor is in the de-energized state. The AC contactor includes a housing, an electromagnetic system, and a contact system. The existing AC contactors with surge suppression function are directly connected to the main circuit with a resistor wire. When the user connects to the main circuit, there will be loose or loose wiring, which is easy to cause unsatisfactory surge suppression or burn capacitors. Summary of the invention

[0003] The utility model aims to overcome the defects of the prior art and provide an AC contactor with a surge suppression function which has a simple structure, stable and reliable performance, high assembly efficiency and long service life.

[0004] To achieve the above-mentioned purpose, the utility model adopts an AC contactor with a surge suppression function, including a shell, a contact system, and an electromagnetic system for driving the contact system to perform opening and closing actions. The contact system includes a moving contact frame that cooperates with the electromagnetic system, a plurality of moving contact bridges respectively arranged on the moving contact frame, a plurality of static contacts that cooperate with the plurality of moving contact bridges, and a plurality of main circuit terminals arranged on one end of the plurality of static contacts. A surge suppression wiring assembly electrically connected to the main circuit terminals is arranged on the shell. The surge suppression wiring assembly includes an insulating wiring seat arranged on the shell, a plurality of first wiring terminals respectively arranged in the insulating wiring seat, an insulating cover, a plurality of second wiring terminals arranged in the insulating cover, a plurality of conductive sheets arranged in the insulating cover and electrically connected to the plurality of second wiring terminals, and a plurality of resistance wires respectively connected between the plurality of first wiring terminals and the plurality of second wiring terminals. One end of the plurality of conductive sheets has a plug-in sheet that cooperates with the plurality of main circuit wiring terminals, and the plug-in sheets of the plurality of conductive sheets are inserted into the plurality of main circuit wiring terminals.

[0005] The beneficial effects of the above structure are as follows: The surge suppression wiring component can play a role in suppressing surges, and the surge suppression wiring component adopts a modular structure design. Multiple conductive sheets are connected to multiple main circuit terminals in a plug-in manner, which can ensure the connection reliability between the conductive sheets and the main circuit terminals, avoid the phenomenon of loose wiring or loose secondary wiring, and avoid the formation of three-phase imbalance defects. Moreover, the insulating terminal seat and the insulating cover can play a protective role, avoid the risk of electric shock, are also beneficial to the heat dissipation of the internal conductive parts of the surge suppression wiring component, and can ensure the electrical clearance and creepage distance of the surge suppression wiring component. Therefore, the AC contactor has the advantages of simple structure, stable and reliable performance, high assembly efficiency, long service life, and surge suppression function.

[0006] Particularly, a wiring nose is provided at each end of the resistance wire, and the two wiring noses are respectively connected to the first terminal and the second terminal. The resistance wire is connected to the first terminal and the second terminal through the two wiring noses, thereby ensuring a more reliable connection between the resistance wire and the first terminal and the second terminal.

[0007] Particularly, an insulating rubber sleeve is provided between the resistance wire and the two wiring noses. The insulating rubber sleeve can play a protective role and has better insulation performance.

[0008] Particularly, the other end of the conductive sheet has a wiring part, and a threaded hole is provided on the wiring part. The second wiring screw of the second terminal sequentially passes through the wiring nose and the threaded hole and is connected to the insulating cover. The wiring screw of the second terminal fixes the conductive sheet and the wiring nose in the insulating cover, thereby facilitating the assembly of the surge suppression wiring component and the insulating cover, and improving the assembly efficiency.

[0009] Particularly, clamping grooves are respectively provided in the insulating cover corresponding to the multiple conductive sheets, and the multiple conductive sheets are respectively clamped in the clamping grooves of the insulating cover, and a clamping fit between the multiple conductive sheets and the insulating cover is formed. The conductive sheet and the insulating cover are assembled in a clamping fit manner, which is convenient for the assembly of the conductive sheet and the insulating cover and improves the assembly efficiency. Description of the Drawings

[0010] Figure 1 It is a perspective view of an embodiment of the present invention.

[0011] Figure 2 It is an exploded view of an embodiment of the present invention.

[0012] Figure 3 It is a cross-sectional view of an embodiment of the present invention. Detailed Embodiment

[0013] As Figures 1 to 3As shown in the figure, an embodiment of the utility model is an AC contactor with a surge suppression function, which includes a housing 10, a contact system 20, and an electromagnetic system 11 for driving the contact system 20 to perform opening and closing actions. The contact system 20 includes a moving contact carrier 21 that is linked and cooperated with the electromagnetic system 11, a plurality of moving contact bridges 22 respectively arranged on the moving contact carrier 21, a plurality of static contacts 23 that cooperate with the plurality of moving contact bridges 22, and a plurality of main circuit connection terminals 24 arranged at one end of the plurality of static contacts 23. A surge suppression connection assembly 30 electrically connected to the main circuit connection terminals 24 is arranged on the housing 10. The surge suppression connection assembly 30 includes an insulating connection base 31 arranged on the housing 10, a plurality of first connection terminals 32 respectively arranged in the insulating connection base 31, an insulating cover 33, a plurality of second connection terminals 34 arranged in the insulating cover 33, a plurality of conductive sheets 35 arranged in the insulating cover 33 and electrically connected to the plurality of second connection terminals 34, and a plurality of resistance wires 36 respectively connected between the plurality of first connection terminals 32 and the plurality of second connection terminals 34. One end of the plurality of conductive sheets 35 has insertion pieces 351 that cooperate with the plurality of main circuit connection terminals 24, and the insertion pieces 351 of the plurality of conductive sheets 35 are inserted into the plurality of main circuit connection terminals 24.

[0014] As Figure 2 , 3 As shown in the figure, a connection nose 361 is respectively arranged at both ends of the resistance wire 36, and the two connection noses 36 are respectively connected to the first connection terminal 32 and the second connection terminal 34. The resistance wire is connected to the first connection terminal and the second connection terminal through two connection noses, so as to ensure a more reliable connection between the resistance wire and the first connection terminal and the second connection terminal. An insulating rubber sleeve 362 is arranged between the resistance wire 36 and the two connection noses 361. The insulating rubber sleeve can play a protective role and has better insulation performance. The other end of the conductive sheet 35 has a connection part 352, and a threaded hole 3521 is arranged on the connection part 352. The second connection screw 341 of the second connection terminal 34 sequentially passes through the connection nose 361 and the threaded hole 3521 and is connected to the insulating cover 33. The connection screw of the second connection terminal fixes the conductive sheet and the connection nose in the insulating cover, so as to facilitate the assembly of the surge suppression connection assembly and the insulating cover, and the assembly efficiency is higher. Corresponding to the plurality of conductive sheets 35 in the insulating cover 33, clamping grooves 331 are respectively arranged, and the plurality of conductive sheets 35 are respectively clamped in the clamping grooves 331 of the insulating cover 33, and a clamping fit between the plurality of conductive sheets 35 and the insulating cover 33 is formed. The conductive sheet and the insulating cover are assembled by a clamping fit method, which is convenient for the assembly of the conductive sheet and the insulating cover, and the assembly efficiency is higher.

[0015] The surge suppression wiring component can play a role in suppressing surges. The surge suppression wiring component adopts a modular structure design. Multiple conductive sheets are connected to multiple main circuit terminal blocks in a plug-in manner, which can ensure the connection reliability between the conductive sheets and the main circuit terminal blocks, avoid the phenomenon of loose wiring or loose secondary wiring, and prevent the formation of three-phase imbalance defects. Moreover, the insulating terminal block and the insulating cover can play a protective role, avoid the risk of electric shock, facilitate the heat dissipation of the internal conductive parts of the surge suppression wiring component, and ensure the electrical clearance and creepage distance of the surge suppression wiring component. Therefore, the AC contactor has the advantages of simple structure, stable and reliable performance, high assembly efficiency, long service life, and surge suppression function.

Claims

1. An AC contactor with surge suppression function, comprising a housing, a contact system, and an electromagnetic system for driving the contact system to perform opening and closing actions, wherein the contact system comprises a movable contact frame that cooperates with the electromagnetic system, a plurality of movable contact bridges that are respectively arranged on the movable contact frame, a plurality of stationary contacts that cooperate with the plurality of movable contact bridges, and a plurality of main circuit terminals that are arranged on one end of the plurality of stationary contacts, characterized in that: The shell is provided with a surge suppression wiring assembly electrically connected to the main circuit terminals. The surge suppression wiring assembly includes an insulating wiring seat arranged on the shell, a plurality of first wiring terminals respectively arranged in the insulating wiring seat, an insulating cover, a plurality of second wiring terminals arranged in the insulating cover, a plurality of conductive sheets arranged in the insulating cover and electrically connected to the plurality of second wiring terminals, and a plurality of resistance wires respectively connected between the plurality of first wiring terminals and the plurality of second wiring terminals. One end of the plurality of conductive sheets has a plug-in sheet that cooperates with the plurality of main circuit wiring terminals, and the plug-in sheets of the plurality of conductive sheets are inserted into the plurality of main circuit wiring terminals.

2. The AC contactor with surge suppression function according to claim 1, characterized in that: Two ends of the resistance wire are respectively provided with a wiring nose, and the two wiring noses are respectively connected to the first wiring terminal and the second wiring terminal.

3. The AC contactor with surge suppression function according to claim 2, characterized in that: An insulating rubber sleeve is arranged between the resistance wire and the two wiring lugs.

4. The AC contactor with surge suppression function according to claim 1 or 2, characterized in that: The other end of the conductive sheet has a wiring portion, which is provided with a threaded hole. The second wiring screw of the second wiring terminal passes through the wiring nose and the threaded hole in sequence and is connected to the insulating cover.

5. The AC contactor with surge suppression function according to claim 1 or 2, characterized in that: The insulating cover is provided with snap-fit ​​grooves corresponding to the plurality of conductive sheets, and the plurality of conductive sheets are snap-fitted in the snap-fit ​​grooves of the insulating cover, and snap-fitting of the plurality of conductive sheets and the insulating cover is formed.

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