AC / DC contactor with surge protection function

Abstract

The utility model relates to an AC / DC contactor with a surge protection function, which comprises a base, a cover body, an electromagnetic assembly and a contact system, the electromagnetic assembly comprises a static iron core, a coil framework, a movable iron core, a spring, a coil and two conducting strips, and the contact system comprises a contact frame in linkage fit with the movable iron core, a plurality of movable contacts and a plurality of static contacts. A circuit board module electrically connected with the coil is arranged in the base and comprises a box body, an alternating current and direct current conversion circuit board electrically connected with the coil and a surge protection circuit board electrically connected with the coil, and a first containing groove and a second containing groove are formed in the box body. And the AC / DC conversion circuit board and the surge protection circuit board are respectively placed in the first accommodating groove and the second accommodating groove. The utility model has the advantages of simple structure, stable and reliable performance, convenient assembly, long service life and surge protection function.

Description

Technical Field

[0001] The utility model relates to the technical field of contactors, in particular to an AC / DC contactor with a surge protection 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 / DC 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 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 the contacts are reset, and the contactor is in the de-energized state. The structural design of the existing AC / DC universal contactor is unreasonable. The AC / DC conversion circuit board of the AC / DC universal contactor does not have an independent installation space. The AC / DC conversion circuit board and the electromagnetic component are easy to affect each other, and the assembly of the AC / DC conversion circuit board is relatively cumbersome. The AC / DC contactor does not have a surge protection function, so the service life of the AC / DC contactor is short and the reliability is low. Summary of the invention

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

[0004] To achieve the above-mentioned purpose, the utility model adopts an AC / DC contactor with a surge protection function, comprising a base, a cover body arranged on the base, an electromagnetic assembly arranged in the base, and a contact system arranged in the cover body. The electromagnetic assembly comprises a static iron core arranged in the base, a coil frame arranged on the static iron core, a moving iron core slidably arranged on the coil frame, a spring arranged between the moving iron core and the coil frame, a coil arranged on the coil frame, and two conductive sheets arranged on the coil frame and electrically connected to the coil. The contact system comprises a contact frame coordinated with the moving iron core, a plurality of moving contacts coordinatedly arranged on the contact frame, and a plurality of static contacts arranged in the cover body and coordinated with the plurality of moving contacts. A circuit board module electrically connected to the coil is arranged in the base. The circuit board module comprises a box body arranged in the base at one side corresponding to the electromagnetic assembly, an AC / DC conversion circuit board electrically connected to the coil, and a surge protection circuit board electrically connected to the coil. A first accommodating groove and a second accommodating groove are respectively arranged in the box body, and the AC / DC conversion circuit board and the surge protection circuit board are respectively placed in the first accommodating groove and the second accommodating groove.

[0005] The beneficial effects of the above structure are: the AC / DC conversion circuit board and the surge protection circuit board are integrated in the box body, and a modular structure design is adopted, so that the electromagnetic component and the circuit board module can be separated, which is beneficial to improving the working reliability of the AC / DC contactor. The surge protection circuit board can play the role of surge protection, and can effectively protect the equipment from adverse factors such as overvoltage, current shock and lightning strike, thereby extending the life of the equipment. It is convenient for the modular assembly of the circuit board module and the base, and the assembly efficiency is higher. The electromagnetic component adopts a modular structure design, which is conducive to the modular assembly of the AC / DC contactor, and the assembly efficiency is higher. Therefore, the AC / DC contactor has the advantages of simple structure, stable and reliable performance, convenient assembly, and long service life.

[0006] In particular, the two sides of the static iron core are respectively provided with a plurality of limiting protrusions, the coil frame is respectively provided with a plurality of limiting grooves matched with the plurality of limiting protrusions, the plurality of limiting protrusions are respectively engaged in the plurality of limiting grooves, and constitute the engagement between the static iron core and the coil frame. The coil frame is engaged with the plurality of limiting protrusions of the static iron core, and the coil frame and the static iron core are integrated and modularized, thereby realizing the modular assembly of the AC / DC contactor.

[0007] In particular, the base is provided with a plurality of positioning grooves at the positions of the plurality of limiting protrusions corresponding to the static iron core, and the plurality of limiting protrusions are respectively engaged in the plurality of positioning grooves, and constitute a snap-fitting fit between the static iron core and the base. The static iron core is engaged in the base through the plurality of limiting protrusions, thereby realizing modular assembly of the electromagnetic component and the base, and achieving higher assembly efficiency.

[0008] Particularly, the contact frame is provided with a clamping groove matched with the moving iron core, the upper end of the moving iron core is clamped in the clamping groove, and a latch is connected between the contact frame and the moving iron core.

[0009] In particular, the two ends of the two conductive sheets are respectively provided with connection screws exposed outside the base, the cover body and the base are provided with connection holes corresponding to the connection screws, and the cover body is provided with connection screw holes corresponding to the connection screws. The cover body covers the connection screws of the conductive sheets, which can prevent the connection screws from being exposed outside the base, thereby facilitating the working reliability of the AC / DC contactor. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a stereogram of an embodiment of the utility model.

[0011] Figure 2 This is a cross-sectional view of an embodiment of the utility model.

[0012] Figure 3 This is an exploded view of an embodiment of the utility model.

[0013] Figure 4This is an assembly diagram of the coil skeleton and the static iron core according to an embodiment of the utility model. DETAILED DESCRIPTION

[0014] like Figures 1 to 4 As shown, the embodiment of the utility model is an AC / DC contactor with surge protection function, including a base 10, a cover 11 arranged on the base 10, an electromagnetic assembly 20 arranged in the base 10, and a contact system 30 arranged in the cover 11, wherein the electromagnetic assembly 20 includes a static iron core 21 arranged in the base 10, a coil frame 22 arranged on the static iron core 21, a moving iron core 23 slidably arranged on the coil frame 22, a spring 24 arranged between the moving iron core 23 and the coil frame 22, a coil 25 arranged on the coil frame 22, and two conductive sheets 26 arranged on the coil frame 22 and electrically connected to the coil 25, and the contact system 30 includes a contact that cooperates with the moving iron core 23. The base 10 is provided with a circuit board module 40 electrically connected to the coil 25, and the circuit board module 40 includes a box body 41 arranged in the base 10 at one side of the corresponding electromagnetic component 20, an AC / DC conversion circuit board 42 electrically connected to the coil 25, and a surge protection circuit board 43 electrically connected to the coil 25. The box body 41 is respectively provided with a first accommodating groove 411 and a second accommodating groove 412, and the AC / DC conversion circuit board 42 and the surge protection circuit board 43 are respectively placed in the first accommodating groove 411 and the second accommodating groove 412.

[0015] like Figure 2 , 3 As shown in Figures 4 and 5, the two sides of the static iron core 21 are respectively provided with a plurality of limiting protrusions 211, and the coil skeleton 22 is respectively provided with a plurality of limiting grooves 221 that match the plurality of limiting protrusions 211. The plurality of limiting protrusions 211 are respectively engaged in the plurality of limiting grooves 221, and constitute the clamping fit between the static iron core 21 and the coil skeleton 22. The coil skeleton is engaged with the plurality of limiting protrusions of the static iron core, and the coil skeleton and the static iron core are integrated and modularized, so that the modular assembly of the AC / DC contactor can be realized. The base 10 is respectively provided with a plurality of positioning grooves 101 corresponding to the plurality of limiting protrusions 211 of the static iron core 21, and the plurality of limiting protrusions 211 are respectively engaged in the plurality of positioning grooves 101, and constitute the clamping fit between the static iron core 21 and the base 10. The static iron core is engaged in the base through the plurality of limiting protrusions, so that the modular assembly of the electromagnetic component and the base can be realized, and the assembly efficiency is higher. The contact frame 31 is provided with a clamping groove 311 matched with the moving iron core 23 , the upper end of the moving iron core 23 is clamped in the clamping groove 311 , and a latch 34 is connected between the contact frame 31 and the moving iron core 23 .

[0016] like Figure 1 and 3 As shown, the two ends of the two conductive sheets 26 are respectively provided with connection screws 27 exposed outside the base 10, the cover 11 and the base 10 are provided with connection holes 111 corresponding to the connection screws 27, and the cover 11 is provided with connection screw holes 112 corresponding to the connection screws 27. The cover covers the connection screws of the conductive sheets to prevent the connection screws from being exposed outside the base, thereby facilitating the improvement of the working reliability of the AC / DC contactor.

[0017] The AC / DC conversion circuit board and the surge protection circuit board are integrated in the box body, and a modular structure design is adopted, so that the electromagnetic component can be separated from the circuit board module, which is conducive to improving the working reliability of the AC / DC contactor. The surge protection circuit board can play the role of surge protection, and can effectively protect the equipment from adverse factors such as overvoltage, current shock and lightning strike, thereby extending the life of the equipment. It is convenient for the modular assembly of the circuit board module and the base, and the assembly efficiency is higher. The electromagnetic component adopts a modular structure design, which is conducive to the modular assembly of the AC / DC contactor, and the assembly efficiency is higher. Therefore, the AC / DC contactor has the advantages of simple structure, stable and reliable performance, convenient assembly, and long service life.

Claims

1. An AC / DC contactor with surge protection function, comprising a base, a cover body arranged on the base, an electromagnetic component arranged in the base, and a contact system arranged in the cover body, characterized in that: The electromagnetic component includes a static iron core arranged in the base, a coil frame arranged on the static iron core, a moving iron core slidably arranged on the coil frame, a spring arranged between the moving iron core and the coil frame, a coil arranged on the coil frame, and two conductive sheets arranged on the coil frame and electrically connected to the coil. The contact system includes a contact frame that cooperates with the moving iron core, a plurality of moving contacts that are linked to the contact frame, and a plurality of static contacts that are arranged in the cover body and cooperate with the plurality of moving contacts. A circuit board module electrically connected to the coil is arranged in the base. The circuit board module includes a box body arranged in the base at one side corresponding to the electromagnetic component, an AC / DC conversion circuit board electrically connected to the coil, and a surge protection circuit board electrically connected to the coil. A first accommodating groove and a second accommodating groove are respectively arranged in the box body. The AC / DC conversion circuit board and the surge protection circuit board are respectively placed in the first accommodating groove and the second accommodating groove.

2. The AC / DC contactor with surge protection function according to claim 1, characterized in that: A plurality of limiting protrusions are respectively arranged on both sides of the static iron core, and a plurality of limiting grooves matching with the plurality of limiting protrusions are respectively arranged on the coil frame. The plurality of limiting protrusions are respectively engaged in the plurality of limiting grooves, and constitute a snap-fitting fit between the static iron core and the coil frame.

3. The AC / DC contactor with surge protection function according to claim 2, characterized in that: A plurality of positioning grooves are respectively arranged at the plurality of limiting protrusions corresponding to the static iron core in the base, and the plurality of limiting protrusions are respectively engaged in the plurality of positioning grooves to form a snap-fitting fit between the static iron core and the base.

4. The AC / DC contactor with surge protection function according to claim 1 or 2, characterized in that: The contact frame is provided with a clamping groove matched with the moving iron core, the upper end of the moving iron core is clamped in the clamping groove, and a latch is connected between the contact frame and the moving iron core.

5. The AC / DC contactor with surge protection function according to claim 1 or 2, characterized in that: The two ends of the two conductive sheets are respectively provided with connection screws exposed outside the base, connection holes are provided between the cover body and the base corresponding to the connection screws, and connection screw holes are provided on the cover body corresponding to the connection screws.

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