Alternating current contactor

Abstract

The utility model relates to an alternating current contactor, which comprises a shell, a contact system and an electromagnetic system, the shell comprises a first inner shell, a second inner shell, a first outer shell and a second outer shell, and an electromagnetic containing cavity used for containing the electromagnetic system is formed between the first inner shell and the second inner shell. Two contact containing cavities used for containing the contact system are formed between the first inner shell and the first outer shell and between the second inner shell and the second outer shell, the electromagnetic system comprises a yoke, a coil frame, a coil, an iron core, an armature, a tension spring and a pushing frame, the contact system comprises two contact sets, and each contact set comprises a static contact, a movable contact plate and a movable reed. One end of the pushing frame is provided with two driving arms which respectively extend into the two contact accommodating cavities, the driving arms are provided with clamping grooves, the movable contact spring is clamped in the clamping grooves, and linkage matching of the movable contact spring and the pushing frame is formed. The utility model has the advantages of simple structure, stable and reliable performance, high assembly efficiency and high safety.

Description

Technical Field

[0001] The utility model specifically relates to an AC contactor. 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 (operation 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 contacts are reset, and the contactor is in the de-energized state. The AC contactor includes a shell, an electromagnetic system (weak current part), and a contact system (strong current part). There is basically no isolation between the weak current part and the strong and weak current of the existing AC contactor, and the distance is close, there are safety hazards, the safety is not high, and the structural design of the electromagnetic system is relatively complex, which is not conducive to modular assembly and the assembly efficiency is low. Summary of the invention

[0003] The utility model aims to overcome the defects of the prior art and provide an AC contactor with simple structure, stable and reliable performance, high assembly efficiency and high safety.

[0004] To achieve the above-mentioned purpose, the utility model adopts an AC contactor, including a shell, a contact system, and an electromagnetic system for driving the contact system to perform opening and closing actions, wherein the shell includes a first inner shell, a second inner shell arranged on the first inner shell, a first outer shell arranged on the first inner shell, and a second outer shell arranged on the second inner shell, an electromagnetic accommodating cavity for placing the electromagnetic system is formed between the first inner shell and the second inner shell, two contact accommodating cavities for placing the contact system are formed between the first inner shell and the first outer shell, and between the second inner shell and the second outer shell, the electromagnetic system includes a yoke, a contact accommodating cavity arranged on the first inner shell, and a second contact accommodating cavity arranged on the second inner shell. A coil frame on a yoke, a coil arranged on the coil frame, an iron core arranged in the coil frame, an armature rotatably arranged on the yoke, a tension spring arranged between the armature and the yoke, and a pushing frame that cooperates with the armature. The contact system includes two groups of contact groups respectively arranged in two contact accommodating cavities, the contact groups include a static contact, a moving contact plate, and a moving spring piece arranged on one end of the moving contact plate. One end of the pushing frame has two driving arms extending into the two contact accommodating cavities respectively, and a clamping groove is arranged on the driving arm. The moving spring piece is clamped in the clamping groove, and constitutes a linkage cooperation between the moving spring piece and the pushing frame.

[0005] The beneficial effects of the above structure are: the electromagnetic system and the contact group are respectively arranged in the electromagnetic accommodating chamber and the contact accommodating chamber of the shell, so that the strong current and weak current of the AC contactor can be separated, the insulation performance is better, and the safety is higher. The electromagnetic system adopts a modular structure design, the structure is simpler, and the assembly is more convenient. The push frame drives the two groups of contact groups through two driving arms, and the moving spring is engaged in the clamping groove of the driving arm, so as to facilitate the assembly of the animation and the push frame, and ensure that the push frame can reliably drive the moving spring to move, which is conducive to improving the working reliability of the AC contactor. Therefore, the AC contactor has the advantages of simple structure, stable and reliable performance, high assembly efficiency, and high safety.

[0006] In particular, a guide hole is provided on the first inner shell and the second inner shell at positions corresponding to the two driving arms, and the driving arms are inserted into the guide holes, and a sliding connection is formed between the driving arms and the first inner shell and the second inner shell. The guide holes guide the driving arms of the push frame, and can ensure that the push frame can reliably move on the first inner shell and the second inner shell.

[0007] In particular, one end of the movable spring is riveted to the movable contact plate, the other end of the movable spring is bent and extended toward the static contact, and a strip hole is provided on the bent portion of the movable spring, and the strip hole is provided in the middle of the bent portion and extends along the length direction of the movable spring. The strip hole is provided on the bent portion of the movable spring, which can avoid stress concentration on the bent portion of the movable spring, ensure the elasticity of the movable spring, and is conducive to improving the working reliability of the AC contactor.

[0008] In particular, a limiting groove is provided at the two sides of the corresponding yoke in the first inner shell and the second inner shell, and the two sides of the yoke are respectively engaged in the limiting groove, and the yoke is engaged with the first inner shell and the second inner shell. The yoke is engaged in the limiting groove of the first inner shell and the second inner shell, which is conducive to the modular assembly of the electromagnetic system and the first inner shell and the second inner shell, and the assembly efficiency is higher.

[0009] In particular, one end of the armature has a transmission arm matched with the push frame, the push frame is provided with a toggle hole matched with the transmission arm, the transmission arm is inserted into the toggle hole, and the toggle hole is provided with arc-surface convex strips that abut against the two sides of the transmission arm. The armature is clamped in the toggle hole of the push frame through the transmission arm, so that the assembly of the armature and the push frame is convenient, the assembly is more convenient, and the transmission between the push frame and the armature is more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0011] Figure 2 This is an exploded view of an embodiment of the utility model.

[0012] Figure 3 This is an internal structure diagram of an embodiment of the utility model. DETAILED DESCRIPTION

[0013] like Figures 1 to 3 As shown, the embodiment of the utility model is an AC contactor, including a housing 10, a contact system 20, and an electromagnetic system 30 for driving the contact system 20 to perform opening and closing actions. The housing 10 includes a first inner shell 11, a second inner shell 12 arranged on the first inner shell 11, a first outer shell 13 arranged on the first inner shell 11, and a second outer shell 14 arranged on the second inner shell 12. An electromagnetic accommodating cavity 100 for accommodating the electromagnetic system 30 is formed between the first inner shell 11 and the second inner shell 12. Two contact accommodating cavities 101 for accommodating the contact system 20 are formed between the first inner shell 11 and the first outer shell 13, and between the second inner shell 12 and the second outer shell 14. The electromagnetic system 30 includes a yoke 31, a coil frame 32 arranged on the yoke 31, and a coil frame 32 arranged on the yoke 31. , a coil 320 arranged on a coil frame 32, an iron core 33 arranged in the coil frame 32, an armature 34 rotatably arranged on a yoke 31, a tension spring 35 arranged between the armature 34 and the yoke 31, and a pushing frame 36 that cooperates with the armature 31. The contact system 20 includes two groups of contact groups 21 respectively arranged in two contact accommodating cavities 101, the contact group 21 includes a static contact 23, a moving contact plate 24, and a moving spring piece 25 arranged on one end of the moving contact plate 24. One end of the pushing frame 36 has two driving arms 361 extending into the two contact accommodating cavities 101 respectively, and a snap-in groove 3611 is arranged on the driving arm 361. The moving spring piece 25 is snapped in the snap-in groove 3611, and the moving spring piece 25 and the pushing frame 36 are linked and cooperated. A guide hole 102 is provided at the positions corresponding to the two driving arms 361 on the first inner shell 11 and the second inner shell 12, respectively. The driving arms 361 are inserted into the guide holes 361, and the driving arms 361 are slidably connected with the first inner shell 11 and the second inner shell 12. The guide holes guide the driving arms of the push frame, and can ensure that the push frame can operate reliably on the first inner shell and the second inner shell. One end of the movable spring piece 25 is riveted to the movable contact plate 24, and the other end of the movable spring piece 25 is bent and extended toward the static contact 23, and a strip hole 2511 is provided on the bent portion 251 of the movable spring piece 25, and the strip hole 2511 is provided on the middle part of the bent portion 251 and extends along the length direction of the movable spring piece 25. The strip hole is provided on the bent portion of the movable spring piece, which can avoid stress concentration on the bent portion of the movable spring piece, ensure the elasticity of the movable spring piece, and help improve the working reliability of the AC contactor.

[0014] A limiting groove 103 is respectively provided at the two sides of the corresponding yoke 31 in the first inner shell 11 and the second inner shell 12, and the two sides of the yoke 31 are respectively engaged in the limiting groove 103, and constitute the clamping fit between the yoke 31 and the first inner shell 11 and the second inner shell 12. The yoke is engaged in the limiting grooves of the first inner shell and the second inner shell, which is conducive to the modular assembly of the electromagnetic system and the first inner shell and the second inner shell, and the assembly efficiency is higher.

[0015] One end of the armature 34 has a transmission arm 341 matched with the push frame 36, and the push frame 36 is provided with a toggle hole 362 matched with the transmission arm 341, and the transmission arm 341 is inserted into the toggle hole 361, and the toggle hole 362 is provided with arc-surface convex strips 3621 that abut against the two sides of the transmission arm 341. The armature is engaged in the toggle hole of the push frame through the transmission arm, so that the assembly of the armature and the push frame is convenient, the assembly is more convenient, and the transmission between the push frame and the armature can be ensured to be more reliable.

[0016] The electromagnetic system and the contact group are respectively arranged in the electromagnetic accommodating chamber and the contact accommodating chamber of the shell, so that the strong current and weak current of the AC contactor can be separated, the insulation performance is better, and the safety is higher. The electromagnetic system adopts a modular structure design, the structure is simpler, and the assembly is more convenient. The push frame drives the two groups of contact groups through two driving arms, and the moving spring is engaged in the card slot of the driving arm, so as to facilitate the assembly of the animation and the push frame, and ensure that the push frame can reliably drive the moving spring to move, which is conducive to improving the working reliability of the AC contactor. Therefore, the AC contactor has the advantages of simple structure, stable and reliable performance, high assembly efficiency, and high safety.

Claims

1. An AC contactor, comprising a housing, a contact system, and an electromagnetic system for driving the contact system to perform opening and closing actions, characterized in that: The shell comprises a first inner shell, a second inner shell arranged on the first inner shell, a first outer shell arranged on the first inner shell, and a second outer shell arranged on the second inner shell. An electromagnetic accommodating cavity for placing an electromagnetic system is formed between the first inner shell and the second inner shell. Two contact accommodating cavities for placing a contact system are formed between the first inner shell and the first outer shell, and between the second inner shell and the second outer shell. The electromagnetic system comprises a yoke, a coil frame arranged on the yoke, a coil arranged on the coil frame, an iron core arranged in the coil frame, an armature rotatably arranged on the yoke, a tension spring arranged between the armature and the yoke, and a pushing frame coordinated with the armature. The contact system comprises two groups of contact groups respectively arranged in the two contact accommodating cavities. The contact groups comprise a static contact, a moving contact plate, and a moving spring sheet arranged on one end of the moving contact plate. One end of the pushing frame comprises two driving arms respectively extending in the two contact accommodating cavities. A clamping groove is arranged on the driving arm. The moving spring sheet is clamped in the clamping groove, and a linkage cooperation between the moving spring sheet and the pushing frame is formed.

2. The AC contactor according to claim 1, characterized in that: A guide hole is respectively arranged on the first inner shell and the second inner shell corresponding to the two driving arms. The driving arms are inserted into the guide holes, and a sliding connection is formed between the driving arms and the first inner shell and the second inner shell.

3. The AC contactor according to claim 1 or 2, characterized in that: One end of the movable spring is riveted on the movable contact plate, and the other end of the movable spring is bent and extended toward the static contact. A strip hole is provided on the bent portion of the movable spring. The strip hole is provided in the middle of the bent portion and extends along the length direction of the movable spring.

4. The AC contactor according to claim 1 or 2, characterized in that: A limiting groove is respectively arranged at both sides of the corresponding yoke in the first inner shell and the second inner shell, and the two sides of the yoke are respectively engaged in the limiting groove, and the yoke is engaged with the first inner shell and the second inner shell.

5. The AC contactor according to claim 1 or 2, characterized in that: One end of the armature has a transmission arm matched with a push frame, the push frame is provided with a toggle hole matched with the transmission arm, the transmission arm is inserted in the toggle hole, and the toggle hole is provided with arc convex strips that abut against both sides of the transmission arm.

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