Alternating current contactor
By introducing arc extinguishing plates and arc extinguishing grooves into the contact system of the AC contactor, the problem of poor arc extinguishing performance of the contact system in the prior art is solved, rapid cooling and extinguishing of the arc is achieved, service life is extended, and structural simplicity and assembly efficiency of the equipment are improved.
Patent Information
- Application Number
- CN202421948769.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-12
- Publication Date
- 2025-06-06
- Estimated Expiration
- 2034-08-12
AI Technical Summary
The contact system of existing AC contactors has poor arc extinguishing performance, and the contacts are easily ablated by arcs, resulting in a short electrical service life, complex structure, unreliable performance, and inconvenient assembly.
An alternating contactor including a housing, a contact system and an electromagnetic system is designed. An arc extinguishing plate is provided in the contact system. An arc extinguishing groove is provided in the arc extinguishing plate that matches the motion trajectory of the moving contact bridge, and a cog groove is provided on the arc extinguishing plate to increase the cooling contact area of the arc.
Through the design of the arc extinguishing plate, the arc can be quickly extinguished, avoiding arc ablation of the dynamic contact bridge and static contacts, thereby extending the service life of the contact system and improving the structural simplicity, performance stability and assembly efficiency of the AC contactor.
Smart Images
Figure CN222953003U_ABST
Abstract
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 (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 arc extinguishing performance of the contact system of the existing AC contactor is poor, and the contacts are easily burned by the arc, resulting in a short electrical service life of the AC contactor. In addition, the AC contactor also has the defects of complex structure, unreliable performance, and inconvenient assembly. 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 long service life.
[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 contact system includes a contact frame that cooperates with the electromagnetic system, a moving contact bridge that is linked to the contact frame, and a static contact that is arranged in the shell and cooperates with the moving contact bridge. An arc extinguishing piece is arranged in the shell above the corresponding moving contact bridge. The arc extinguishing piece has an arc extinguishing groove that matches the movement trajectory of the moving contact bridge, and the arc extinguishing piece has a tooth groove on one end facing the moving contact bridge.
[0005] The beneficial effects of the above structure are: the arc extinguishing piece in the housing can extinguish the arc, the arc between the moving contact bridge and the static contact can quickly enter the arc extinguishing groove of the arc extinguishing piece, and the tooth groove of the arc extinguishing piece can increase the contact area between the arc extinguishing piece and the arc, which is conducive to the rapid cooling and extinguishing of the arc, and can avoid the arc burning the moving contact bridge and the static contact, which is conducive to extending the service life of the contact system. Therefore, the AC contactor has the advantages of simple structure, stable and reliable performance, high assembly efficiency and long service life.
[0006] In particular, a terminal is provided at one end of the static contact, a terminal cover covering the terminal is provided on the housing, a wiring hole is provided on the terminal cover at a connection screw corresponding to the terminal, clips are provided on both sides of the terminal cover, a slot matching the clips is provided on the housing, the clips are engaged in the slots, and a clamping fit between the terminal cover and the housing is formed. The terminal cover can prevent the terminal from being exposed outside the housing, and has better protection performance. The terminal cover and the housing are assembled in a clamping fit, and the assembly is more convenient.
[0007] In particular, the arc extinguishing piece is provided with convex strips matching with the housing on both sides, the housing is provided with a clamping groove matching with the convex strip, the convex strip is clamped in the clamping groove, and the arc extinguishing piece and the housing are clamped together. The arc extinguishing piece and the housing are assembled by clamping, which is more convenient.
[0008] In particular, the arc extinguishing piece has an anti-dropping piece that matches the housing, and the housing is provided with a limiting protrusion that matches the anti-dropping piece. The anti-dropping piece abuts against the limiting protrusion, and forms a limiting match between the anti-dropping piece and the limiting protrusion. The anti-dropping piece can play an anti-dropping role, and the connection between the arc extinguishing piece and the housing is more compact.
[0009] In particular, the arc extinguishing piece is provided with a positioning hole, and the housing is provided with a positioning protrusion matched with the positioning hole, and the positioning protrusion is engaged in the positioning hole to form a snap fit between the arc extinguishing piece and the housing. The arc extinguishing piece is engaged with the positioning protrusion of the housing, thereby facilitating the assembly of the arc extinguishing piece and the housing, and the assembly efficiency is higher.
[0010] In particular, a spring is provided between the moving contact bridge and the contact frame, a limiting boss is provided on the moving contact bridge and engaged with one end of the spring, and a limiting block is provided on the contact frame and engaged with the other end of the spring. The spring can increase the contact pressure of the moving contact and ensure that the contact between the moving contact bridge and the static contact is more reliable. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 It is a stereogram of an embodiment of the utility model.
[0012] Figure 2 This is an exploded view of an embodiment of the utility model.
[0013] Figure 3 This is an assembly diagram of the arc extinguishing piece and the housing according to an embodiment of the utility model. DETAILED DESCRIPTION
[0014] like Figures 1 to 3As shown, an embodiment of the utility model is an AC contactor, including a shell 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 contact frame 21 that cooperates with the electromagnetic system 11, a moving contact bridge 22 that is linked to the contact frame 21, and a static contact 23 that is arranged in the shell 10 and cooperates with the moving contact bridge 22. An arc extinguishing piece 24 is arranged in the shell 10 above the corresponding moving contact bridge 22. The arc extinguishing piece 24 has an arc extinguishing groove 241 that matches the movement trajectory of the moving contact bridge 22, and the arc extinguishing piece 24 has a tooth groove 242 on one end facing the moving contact bridge 22. The static contact 23 is provided with a connection terminal 25 at one end, the housing 10 is provided with a terminal cover 12 covering the connection terminal 25, the terminal cover 12 is provided with a connection hole 121 at a connection screw 251 corresponding to the connection terminal 25, the terminal cover 12 is provided with clips 122 on both sides, the housing 10 is provided with a card slot 101 matched with the clip 122, the clip 122 is engaged in the card slot 101, and constitutes a card connection between the terminal cover 12 and the housing 10. The terminal cover can prevent the connection terminal from being exposed outside the housing, and the protection performance is better. The terminal cover and the housing are assembled in a card connection manner, and the assembly is more convenient.
[0015] like Figure 2 and 3 As shown, the arc extinguishing piece 24 is provided with convex strips 243 matching with the housing 10 on both sides, and the housing 10 is provided with a snap-in groove 102 matching with the convex strip 243, and the convex strip 243 is snapped into the snap-in groove 102, and constitutes the snap-in fit between the arc extinguishing piece 24 and the housing 10. The arc extinguishing piece and the housing are assembled in a snap-in fit manner, which is more convenient to assemble. The arc extinguishing piece 24 is provided with an anti-slip sheet 244 matching with the housing 10, and the housing 10 is provided with a limiting protrusion 103 matching with the anti-slip sheet 244, and the anti-slip sheet 244 contacts the limiting protrusion 103, and constitutes the limiting fit between the anti-slip sheet 244 and the limiting protrusion 103. The anti-slip sheet can play an anti-slip role, and the connection between the arc extinguishing piece and the housing is more compact. The arc extinguishing piece 24 is provided with a positioning hole 245, and the housing 10 is provided with a positioning protrusion 104 that matches the positioning hole 245. The positioning protrusion 104 is engaged in the positioning hole 245, and constitutes a snap fit between the arc extinguishing piece 24 and the housing 10. The arc extinguishing piece is engaged with the positioning protrusion of the housing, so as to facilitate the assembly of the arc extinguishing piece and the housing, and the assembly efficiency is higher. A spring 26 is provided between the moving contact bridge 22 and the contact frame 21, and a limiting boss 221 that is engaged with one end of the spring 26 is provided on the moving contact bridge 22, and a limiting block 211 that is engaged with the other end of the spring 26 is provided on the contact frame 21. The spring can increase the contact pressure of the moving contact, and can ensure that the contact between the moving contact bridge and the static contact is more reliable.
[0016] The arc extinguishing piece in the housing can extinguish the arc, and the arc between the moving contact bridge and the stationary contact can quickly enter the arc extinguishing slot of the arc extinguishing piece, and the tooth slot of the arc extinguishing piece can increase the contact area between the arc extinguishing piece and the arc, which is conducive to the rapid cooling and extinguishing of the arc, and can avoid the arc burning the moving contact bridge and the stationary contact, which is conducive to extending the service life of the contact system. Therefore, the AC contactor has the advantages of simple structure, stable and reliable performance, high assembly efficiency and long service life.
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 contact system includes a contact frame that cooperates with the electromagnetic system, a moving contact bridge that is linked to the contact frame, and a static contact that is arranged in a shell and cooperates with the moving contact bridge. An arc extinguishing piece is arranged in the shell above the moving contact bridge. The arc extinguishing piece has an arc extinguishing groove that matches the movement trajectory of the moving contact bridge, and the arc extinguishing piece has a tooth groove on one end facing the moving contact bridge.
2. The AC contactor according to claim 1, characterized in that: A terminal is provided at one end of the static contact, a terminal cover is provided on the shell and covers the terminal, a wiring hole is provided on the terminal cover at a connection screw corresponding to the terminal, clips are provided on both sides of the terminal cover, a card slot matching with the clip is provided on the shell, the clip is engaged in the card slot, and a card connection between the terminal cover and the shell is formed.
3. The AC contactor according to claim 1 or 2, characterized in that: The arc-extinguishing piece is provided with convex strips matching with the shell on both sides, and the shell is provided with a clamping groove matching with the convex strip. The convex strip is clamped in the clamping groove to form a clamping fit between the arc-extinguishing piece and the shell.
4. The AC contactor according to claim 1 or 2, characterized in that: The arc extinguishing piece is provided with an anti-dropping piece matched with the shell, and a limiting convex block matched with the anti-dropping piece is arranged in the shell. The anti-dropping piece abuts against the limiting convex block, and the limiting cooperation between the anti-dropping piece and the limiting convex block is formed.
5. The AC contactor according to claim 1 or 2, characterized in that: The arc extinguishing piece is provided with a positioning hole, and the housing is provided with a positioning convex block matched with the positioning hole. The positioning convex block is engaged in the positioning hole to form a snap fit between the arc extinguishing piece and the housing.
6. The AC contactor according to claim 1 or 2, characterized in that: A spring is arranged between the moving contact bridge and the contact frame, a limiting boss engaged with one end of the spring is arranged on the moving contact bridge, and a limiting block engaged with the other end of the spring is arranged on the contact frame.