AC 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 accommodating cavities and two auxiliary 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 comprises a yoke, a coil frame, a coil, an iron core, an armature, a tension spring and a pushing frame, and the contact system comprises two contact groups and two auxiliary contact assemblies. The auxiliary contact assembly comprises an auxiliary static contact and an auxiliary movable reed, one end of the pushing frame is provided with two poke rods extending out of the first inner shell and the second inner shell, one ends of the auxiliary movable reeds of the two sets of auxiliary contacts abut against the two poke rods respectively, and the switch has the advantages of being simple in structure, stable and reliable in performance, high in assembly efficiency and high in 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 housing, 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, and the safety is not high. In addition, the structural design of the auxiliary contact assembly of the contact system is relatively complex, which is not conducive to modular assembly and has low assembly efficiency. 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. 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 and two auxiliary contact accommodating cavities 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 coil frame arranged on the yoke, and a coil frame arranged on the coil frame. The contact system comprises two groups of contact groups respectively arranged in two contact accommodating chambers, two groups of auxiliary contact assemblies respectively arranged in two auxiliary contact accommodating chambers, the auxiliary contact assemblies comprise auxiliary static contacts and auxiliary movable springs matched with the auxiliary static contacts, one end of the push frame comprises two toggle rods extending outside the first inner shell and the second inner shell, one ends of the auxiliary movable springs of the two groups of auxiliary contacts respectively abut against the two toggle rods, the two toggle rods move with the push frame and drive the two movable springs to move.

[0005] The beneficial effects of the above structure are: the electromagnetic system, the auxiliary contact assembly, and the contact assembly are respectively arranged in the electromagnetic accommodating chamber, the auxiliary contact accommodating chamber, and the contact accommodating chamber of the shell, so that the strong current and the weak current of the AC contactor can be separated, the insulation performance is better, and the safety is higher. The two sets of auxiliary contacts adopt a modular structure design, which is simpler in structure and more convenient to assemble. The push frame triggers the two sets of auxiliary contact assemblies through two toggle rods, so that the push frame can reliably trigger the two sets of auxiliary contact assemblies. Therefore, the AC contactor has the advantages of simple structure, stable and reliable performance, high assembly efficiency, and high safety.

[0006] In particular, a sliding hole is provided on the first inner shell and the second inner shell at positions corresponding to the two toggle rods, and the toggle rods are inserted into the sliding holes. The toggle rods move with the push frame and reciprocate in the sliding holes. The two toggle rods are slidably arranged in the sliding holes of the first inner shell and the second inner shell, thereby ensuring that the push frame can move reliably, which is beneficial to improving the working reliability of the AC contactor.

[0007] In particular, a positioning groove is provided on the outer wall of the first inner shell and the second inner shell at the auxiliary static contact and the auxiliary moving spring of the two groups of auxiliary contacts, respectively, and the auxiliary static contact and the auxiliary moving spring are respectively arranged in the positioning groove, and a plurality of arc-surface protrusions are arranged in the positioning groove to abut against the auxiliary static contact and the auxiliary moving spring on both sides. The auxiliary static contact and the auxiliary moving spring of the two groups of auxiliary contacts are respectively engaged with the outer wall of the first inner shell and the second inner shell, so as to facilitate the modular assembly of the two groups of auxiliary contacts with the first inner shell and the second inner shell, and the assembly efficiency is higher.

[0008] In particular, the contact group includes a stationary contact, a moving contact plate, and a moving spring piece arranged on one end of the moving contact plate, and the other end of the pushing frame has two driving arms extending into two contact accommodating cavities respectively, and the driving arm is provided with a clamping groove, and the moving spring piece is clamped in the clamping groove, and constitutes a linkage cooperation between the moving spring piece and the pushing frame. The moving spring piece is clamped in the clamping groove of the driving arm, so as to facilitate the assembly of the animation and the pushing frame, and ensure that the pushing frame can reliably drive the moving spring piece to move, which is conducive to improving the working reliability of the AC contactor.

[0009] 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.

[0010] 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.

[0011] 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 armature and the push frame are easily assembled, and the assembly is more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a stereogram of an embodiment of the utility model.

[0013] Figure 2 This is an exploded view of an embodiment of the utility model.

[0014] Figure 3 This is an internal structure diagram of an embodiment of the utility model. DETAILED DESCRIPTION

[0015] like Figures 1 to 3As shown, an 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 13. 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 and two auxiliary contact accommodating cavities 1001 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 arranged on the coil frame 32. 320, an iron core 33 arranged in the coil frame 32, an armature 34 rotatably arranged on the yoke 33, a tension spring 35 arranged between the armature 34 and the yoke 31, and a pushing frame 36 that cooperates with the armature 34. The contact system 20 includes two groups of contact groups 21 respectively arranged in two contact accommodating chambers 101, and two groups of auxiliary contact assemblies 40 respectively arranged in two auxiliary contact accommodating chambers 1001. The auxiliary contact assemblies 40 include auxiliary static contacts 41 and auxiliary movable springs 42 that cooperate with the auxiliary static contacts 41. One end of the pushing frame 36 has two toggle rods 360 extending outside the first inner shell 11 and the second inner shell 12. One ends of the auxiliary movable springs 42 of the two groups of auxiliary contacts 40 respectively abut against the two toggle rods 360. The two toggle rods 360 move with the pushing frame 36 and drive the two movable springs 41 to move. A sliding hole 110 is respectively arranged on the first inner shell 11 and the second inner shell 12 at the positions corresponding to the two toggle rods 360. The toggle rods 360 are inserted into the sliding holes 110. The toggle rods 360 move with the push frame 36 and reciprocate in the sliding holes 110. The two toggle rods are slidably arranged in the sliding holes of the first inner shell and the second inner shell, so as to ensure that the push frame can move reliably, which is beneficial to improving the working reliability of the AC contactor. A positioning groove 111 is respectively arranged on the outer wall of the first inner shell 11 and the second inner shell 12 at the positions corresponding to the auxiliary static contacts 41 and the auxiliary moving spring 42 of the two groups of auxiliary contacts 40. The auxiliary static contacts 41 and the auxiliary moving spring 42 are respectively arranged in the positioning groove 111, and a plurality of arc surface protrusions 112 are arranged in the positioning groove 111 to abut against the auxiliary static contacts 41 and the auxiliary moving spring 42 on both sides. The auxiliary static contacts and auxiliary moving springs of the two sets of auxiliary contacts are respectively engaged with the outer walls of the first inner shell and the second inner shell, thereby facilitating modular assembly of the two sets of auxiliary contacts with the first inner shell and the second inner shell, and achieving higher assembly efficiency.

[0016] like Figure 2 and 3As shown, the contact group 21 includes a static contact 23, a moving contact plate 24, and a moving spring 25 arranged on one end of the moving contact plate 24. The other end of the push frame 36 has two driving arms 361 extending into the two contact accommodating chambers 101 respectively. The driving arm 361 is provided with a clamping groove 3611. The moving spring 25 is clamped in the clamping groove 3611, and the moving spring 25 and the push frame 36 are linked. The moving spring is clamped in the clamping groove of the driving arm, so that the assembly of the animation and the push frame is convenient, and it can be ensured that the push frame can reliably drive the moving spring to move, which is conducive to improving the working reliability of the AC contactor. The first inner shell 11 and the second inner shell 12 are respectively provided with a guide hole 103 corresponding to the two driving arms 361. The driving arm 361 is inserted in the guide hole 102, and the driving arm 361 is connected with the first inner shell 11 and the second inner shell 12. The sliding connection cooperation. The guide hole guides the driving arm of the push frame, and can ensure that the push frame can move reliably on the first inner shell and the second inner shell. 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. One end of the armature 34 has a transmission arm 341 that matches the push frame 361, and the push frame 36 is provided with a toggle hole 362 that matches the transmission arm 341, and the transmission arm 341 is inserted in the toggle hole 362, and the toggle hole 362 is provided with an arc convex strip 3621 that abuts on both sides of the transmission arm 341. The armature is engaged in the shifting hole of the push frame through the transmission arm, so that the armature and the push frame are easily assembled and the assembly is more convenient.

[0017] The electromagnetic system, the auxiliary contact assembly, and the contact assembly are respectively arranged in the electromagnetic accommodating chamber, the auxiliary contact accommodating chamber, and the contact accommodating chamber of the shell, so that the strong current and the weak current of the AC contactor can be separated, the insulation performance is better, and the safety is higher. The two sets of auxiliary contacts adopt a modular structure design, which is simpler in structure and more convenient to assemble. The push frame triggers the two sets of auxiliary contact assemblies through two toggle rods, so that the push frame can reliably trigger the two sets of auxiliary contact assemblies. 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 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 accommodating an electromagnetic system is formed between the first inner shell and the second inner shell. Two contact accommodating cavities and two auxiliary contact accommodating cavities for accommodating 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 includes a yoke, a coil frame arranged on the yoke, a coil arranged on the coil frame, an iron core arranged in the coil frame, and an armature rotatably arranged on the yoke. , a tension spring arranged between the armature and the yoke, and a pushing frame cooperating with the armature. The contact system includes two groups of contact groups respectively arranged in the two contact accommodating cavities, and two groups of auxiliary contact assemblies respectively arranged in the two auxiliary contact accommodating cavities. The auxiliary contact assemblies include auxiliary static contacts and auxiliary movable springs cooperating with the auxiliary static contacts. One end of the pushing frame has two toggle rods extending outside the first inner shell and the second inner shell. One ends of the auxiliary movable springs of the two groups of auxiliary contacts respectively abut against the two toggle rods. The two toggle rods move with the pushing frame and drive the two movable springs to move.

2. The AC contactor according to claim 1, characterized in that: A sliding hole is respectively arranged on the first inner shell and the second inner shell at positions corresponding to the two toggle rods. The toggle rods are inserted into the sliding holes. The toggle rods move along with the pushing frame and reciprocate in the sliding holes.

3. The AC contactor according to claim 1 or 2, characterized in that: A positioning groove is respectively arranged on the outer walls of the first inner shell and the second inner shell at the auxiliary static contacts and the auxiliary movable spring pieces of the two groups of auxiliary contacts. The auxiliary static contacts and the auxiliary movable spring pieces are respectively arranged in the positioning grooves, and a plurality of arc-surface protrusions are arranged in the positioning grooves to abut against the auxiliary static contacts and the auxiliary movable spring pieces on both sides.

4. The AC contactor according to claim 1 or 2, characterized in that: The contact group includes a static contact, a moving contact plate, and a moving spring sheet arranged on one end of the moving contact plate. The other end of the pushing frame has two driving arms extending into two contact accommodating cavities respectively. The driving arm is provided with a snap-in groove, and the moving spring sheet is snapped into the snap-in groove to form a linkage cooperation between the moving spring sheet and the pushing frame.

5. The AC contactor according to claim 4, 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.

6. 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.

7. 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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