Electromagnetic contactor
By designing an electromagnetic contactor including an electromagnetic drive mechanism and a contact system, the problem that the DC electromagnetic contactor in the prior art cannot meet the requirements of high density, large capacity and strong vibration in special occasions, and achieves the effect of simple structure, stable and reliable performance, long service life, and good arc extinguishing effect.
Patent Information
- Application Number
- CN202421715962.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-18
- Publication Date
- 2025-04-29
- Estimated Expiration
- 2034-07-18
AI Technical Summary
The existing DC electromagnetic contactors cannot meet the requirements of high density, large capacity, and strong vibration in special occasions such as railways, oil fields, and mines. They have high failure rate, complex maintenance, short service life, unreliable performance and poor arc extinguishing effect.
An electromagnetic contactor is designed, including a base plate, an electromagnetic drive mechanism and a contact system. The electromagnetic drive mechanism achieves synchronous action through yoke, coil frame, coil, core, armature and tension spring. The contact system increases the contact area and pressure through moving contacts, static contacts, static contacts, static contacts, screws and compression springs, and uses permanent magnets and arc-induced plates to improve the arc extinguishing effect.
It realizes electromagnetic contactors with simple structure, stable and reliable performance, long service life, large contact pressure and good arc extinguishing effect, reducing failure rate and maintenance costs, and extending the service life of the contact.
Smart Images
Figure CN222813498U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of contactors, in particular to an electromagnetic contactor. Background Art
[0002] Contactors are divided into AC contactors (voltage AC) and DC contactors (voltage DC), which are used in power, power distribution and power consumption. In a broad sense, contactors refer to electrical appliances in industrial electricity that use current flowing through a coil to generate a magnetic field to close the contacts to control the load. At present, the DC electromagnetic contactors used in the control circuits of special equipment in railways, oil fields, mines and other occasions are slightly modified on the basis of civilian electromagnetic contactors. They are large in size and have a high failure rate. They cannot meet the high-density, large-capacity, and strong vibration requirements of special occasions such as railways, oil fields, and mines. At the same time, maintenance is complicated, so the maintenance cost is high and the economic benefits are extremely poor. In addition, the contact contact area of the electromagnetic contactor is small, the contact contact pressure is small, and the contact resistance is large. When a large current passes for a long time, the contact power consumption is large, the heat generation is large, the damage to the contact is large, and the contact service life is short. In addition, the electromagnetic contactor also has the defects of unreliable performance and poor arc extinguishing effect. Summary of the invention
[0003] The utility model aims to overcome the defects of the prior art and provide an electromagnetic contactor with simple structure, stable and reliable performance, long service life and good arc extinguishing effect.
[0004] To achieve the above-mentioned purpose, the utility model adopts an electromagnetic contactor, including a base plate, an electromagnetic drive mechanism arranged on the base plate, and a contact system, wherein the electromagnetic drive mechanism includes a yoke arranged on the base plate, 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 and matched with the iron core, and a tension spring arranged between the armature and the yoke, the contact system includes multiple groups of contact assemblies, the contact assembly includes a moving contact frame linked to the armature, a moving contact plate arranged on the moving contact frame, a moving contact arranged on the moving contact plate, a stationary contact frame arranged on the yoke, and a stationary contact arranged on the stationary contact frame, the moving contact is provided with a moving contact block matched with the stationary contact, the stationary contact is provided with a stationary contact block in surface contact with the moving contact block, the moving contact frame is provided with a screw, one end of the screw passes through the positioning hole of the moving contact plate and is tightened with a nut, and a compression spring is arranged between the moving contact plate and the nut.
[0005] The beneficial effects of the above structure are: the moving contact contacts the surface of the static contact block of the static contact through the moving contact block, which can effectively increase the contact area between the moving contact and the static contact, the compression spring can increase the contact pressure between the moving contact and the static contact, the contact resistance is small, the power consumption of the contact is small when a large current passes for a long time, the heat generation is small, the damage to the contact is small, and the service life of the contact is long. The electromagnetic drive mechanism drives the moving contact frame of multiple groups of contact assemblies through the armature, thereby ensuring the synchronization of the actions of multiple groups of contact assemblies. Therefore, the electromagnetic contactor has the advantages of simple structure, stable and reliable performance, long service life, and high contact contact pressure.
[0006] In particular, a permanent magnet is arranged at the stationary contact block corresponding to the stationary contact on the stationary contact frame. The permanent magnet can play a magnetic blowing role, and the permanent magnet arc extinguishing method is adopted, which has a good arc extinguishing effect, reduces the damage of arcing to the main contact when the contactor is disconnected, and prolongs the service life of the contact.
[0007] In particular, a lower arc-starting piece is provided on the stationary contact frame corresponding to the stationary contact, and one end of the arc-starting piece extends toward the stationary contact block. The lower arc-starting piece can play an arc-starting role, which can prevent the stationary contact from being burned by the arc, and is conducive to extending the service life of the stationary contact.
[0008] In particular, the static contact frame is provided with insulating partitions separating the static contacts of the multiple contact assemblies. The insulating partitions can increase the insulation distance between the static contacts of the multiple contact assemblies, and the insulation performance is better.
[0009] In particular, the insulating partition is provided with a support, the support is provided with an upper arc-starting piece matched with the moving contact, one end of the upper arc-starting piece extends toward the moving contact, and the moving contact has an arc-starting angle matched with the upper arc-starting piece. The upper arc-starting piece can play an arc-starting role, can avoid arc ablation of the moving contact, and is conducive to extending the service life of the moving contact.
[0010] In particular, magnetizing sheets are provided on the inner wall of the insulating partition at both sides of the moving contact and the stationary contact, respectively. The magnetizing sheets can play a magnetic blowing role, which can prevent arc erosion of the moving contact and the stationary contact, and is conducive to extending the service life of the moving contact and the stationary contact.
[0011] In particular, the movable contact frame is provided with a partition part separating the multiple groups of contact assemblies. The partition part can increase the insulation distance between the multiple groups of contact assemblies, and the insulation performance is better. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a stereogram of an embodiment of the utility model.
[0013] Figure 2 This is a cross-sectional view of an embodiment of the utility model.
[0014] Figure 3This is an exploded view of an embodiment of the utility model. DETAILED DESCRIPTION
[0015] like Figures 1 to 3 As shown, the embodiment of the utility model is an electromagnetic contactor, including a base plate 10, an electromagnetic drive mechanism 20 arranged on the base plate 10, and a contact system 30, wherein the electromagnetic drive mechanism 20 includes a yoke 21 arranged on the base plate 10, a coil frame 22 arranged on the yoke 21, a coil 23 arranged on the coil frame 22, an iron core 24 arranged in the coil frame 22, an armature 25 rotatably arranged on the yoke 21 and matched with the iron core 24, and a tension spring 26 arranged between the armature 25 and the yoke 21, and the contact system 300 includes a plurality of contact assemblies 30, and the contact assemblies 30 include linkage devices A moving contact frame 31 is arranged on the armature 25, a moving contact plate 32 is arranged on the moving contact frame 31, a moving contact 33 is arranged on the moving contact plate 32, a stationary contact frame 34 is arranged on the yoke 21, and a stationary contact 35 is arranged on the stationary contact frame 34. The moving contact 33 is provided with a moving contact block 331 that matches the stationary contact 35, and the stationary contact 35 is provided with a stationary contact block 351 that contacts the surface of the moving contact block 331. A screw rod 36 is arranged on the moving contact frame 31, one end of the screw rod 36 passes through the positioning hole 321 of the moving contact plate 32 and is tightened with a nut 37, and a compression spring 38 is arranged between the moving contact plate 32 and the nut 37.
[0016] like Figure 2 and 3As shown, a permanent magnet 39 is provided at the stationary contact block 351 corresponding to the stationary contact 35 on the stationary contact frame 34. The permanent magnet can play a role of magnetic blowing. The permanent magnet arc extinguishing method is adopted, and the arc extinguishing effect is good, which reduces the damage to the main contact caused by arcing when the contactor is disconnected, and prolongs the service life of the contact. A lower arc-starting piece 40 is provided at the stationary contact frame 34 corresponding to the stationary contact 35, and one end of the arc-starting piece 40 extends toward the stationary contact block 351. The lower arc-starting piece can play an arc-starting role, which can prevent the stationary contact from being burned by the arc, which is conducive to extending the service life of the stationary contact. The stationary contact frame 34 is respectively provided with insulating partitions 341 separating the stationary contacts 35 of the multiple groups of contact assemblies 30. The insulating partition can increase the insulation distance between the stationary contacts of the multiple groups of contact assemblies, and the insulation performance is better. The insulating partition 341 is provided with a support member 342, and the support member 342 is provided with an upper arc-striking piece 41 matched with the moving contact 33, one end of the upper arc-striking piece 41 extends toward the moving contact 33, and the moving contact 33 has an arc-striking angle 332 matched with the upper arc-striking piece 41. The upper arc-striking piece can play an arc-striking role, which can prevent the arc from burning the moving contact, which is beneficial to prolonging the service life of the moving contact. The inner wall of the insulating partition 341 is provided with magnetizing pieces 42 at both sides corresponding to the moving contact 33 and the static contact 35. The magnetizing piece can play a magnetic blowing role, which can prevent the arc from burning the moving contact and the static contact, which is beneficial to prolonging the service life of the moving contact and the static contact. The moving contact frame 31 is provided with a partition part 311 separating multiple groups of contact assemblies 30. The partition part can increase the insulation distance between multiple groups of contact assemblies, and the insulation performance is better.
[0017] The moving contact is in contact with the static contact block of the static contact through the moving contact block, which can effectively increase the contact area between the moving contact and the static contact. The compression spring can increase the contact pressure between the moving contact and the static contact, and the contact resistance is small. When a large current passes through for a long time, the contact power consumption is small, the heat generation is small, the damage to the contact is small, and the contact service life is long. The electromagnetic drive mechanism drives the moving contact frame of multiple groups of contact assemblies through the armature, thereby ensuring the synchronization of the actions of multiple groups of contact assemblies. Therefore, the electromagnetic contactor has the advantages of simple structure, stable and reliable performance, long service life, and high contact pressure.
Claims
1. An electromagnetic contactor, comprising a base plate, an electromagnetic drive mechanism arranged on the base plate, and a contact system, characterized in that: The electromagnetic drive mechanism includes a yoke arranged on a base plate, 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 and matched with the iron core, and a tension spring arranged between the armature and the yoke; the contact system includes multiple groups of contact assemblies, and the contact assemblies include a moving contact frame linked to the armature, a moving contact plate arranged on the moving contact frame, a moving contact arranged on the moving contact plate, a stationary contact frame arranged on the yoke, and a stationary contact arranged on the stationary contact frame; a moving contact block matched with the stationary contact is arranged on the moving contact, a stationary contact block in surface contact with the moving contact block is arranged on the stationary contact, a screw is arranged on the moving contact frame, one end of the screw passes through the positioning hole of the moving contact plate and is tightened with a nut, and a compression spring is arranged between the moving contact plate and the nut.
2. The electromagnetic contactor according to claim 1, characterized in that: A permanent magnet is arranged on the stationary contact frame at the stationary contact block corresponding to the stationary contact.
3. The electromagnetic contactor according to claim 1 or 2, characterized in that: A lower arc-starting piece is arranged on the stationary contact frame at a position corresponding to the stationary contact, and one end of the arc-starting piece extends toward the stationary contact block.
4. The electromagnetic contactor according to claim 1 or 2, characterized in that: The stationary contact frame is respectively provided with insulating partitions separating the stationary contacts of the multiple groups of contact assemblies.
5. The electromagnetic contactor according to claim 4, characterized in that: The insulating partition is provided with a support member, and an upper arc-starting piece matched with the moving contact is provided on the support member. One end of the upper arc-starting piece extends toward the moving contact, and the moving contact has an arc-starting angle matched with the upper arc-starting piece.
6. The electromagnetic contactor according to claim 4, characterized in that: The inner wall of the insulating partition is provided with magnetizing sheets at both sides corresponding to the moving contact and the stationary contact.
7. The electromagnetic contactor according to claim 1 or 2, characterized in that: The movable contact frame is provided with a partition part which separates the multiple groups of contact components.