Moving contact combination structure of contactor
By setting up an iron housing-type reinforcement plate on the conductive plate and guiding the arc flow, the problems of insufficient strength and arc erosion of traditional moving contacts in high current environments are solved, and the high reliability and long life of the contactor are achieved.
Patent Information
- Application Number
- CN202422304885.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-21
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-09-21
AI Technical Summary
Traditional dynamic contacts are insufficient in high current environments, the copper-iron brazing process is complex and costly, and the arc erosion problem cannot be effectively solved, affecting the electromagnetic field strength and service life.
A cover-type reinforcement plate is provided on the conductive plate. The reinforcement plate is made of iron material, covering the conductive plate and forming a bent portion to guide the arc flow. The contact welding surface is located inside the curved portion to maximize the contact area, and the conductive plate is made of copper material.
It significantly enhances the structural strength of the moving contacts, optimizes the electromagnetic field distribution, reduces arc erosion, improves current transmission efficiency and stability, and extends the service life of the contactor.
Smart Images
Figure CN223092778U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of contactors, in particular to a moving contact combination structure of a contactor. Background Art
[0002] A contactor is an indispensable switching element in the power system, and the performance of its moving contact is crucial. Traditional moving contacts usually consist of a contact point and a conductive plate, and the contact point is welded to the conductive plate. However, in a high-current environment, the insufficient strength of the conductive plate becomes a problem. A copper-iron combination structure is often used to enhance the strength, but the copper-iron brazing process is complex and costly. In addition, in the traditional design, arc-resistant materials are welded at the front end of the contact point to protect the contact point, but it fails to effectively reduce the erosion of the arc on the conductive plate and other components. At the same time, iron parts are located between the moving and static contacts, weakening the electromagnetic field strength and affecting the electromagnetic field arc-blowing and arc-extinguishing effects. Content of the Utility Model
[0003] In view of this, the purpose of the utility model is to provide a moving contact combination structure of a contactor with simple structure, high reliability and long service life.
[0004] To achieve the above purpose, the utility model adopts such a moving contact combination structure of a contactor, which includes a housing. A moving contact is arranged in the housing. The moving contact includes a moving contact point and a conductive plate integrally formed with the moving contact point. An enhancement plate is arranged on the conductive plate. The enhancement plate is of an outer cover type structure and covers the conductive plate.
[0005] Compared with the prior art, the beneficial effects of the above structure are as follows: By arranging an outer cover type enhancement plate on the conductive plate, the overall structural strength of the moving contact is significantly enhanced, making it particularly suitable for high-current application scenarios, effectively solving the problem that the traditional conductive plate is prone to deformation and damage under strong current, thereby improving the reliability and service life of the contactor. At the same time, due to the existence of the enhancement plate, the electromagnetic field distribution around the moving contact is also optimized, enabling the electromagnetic field arc-blowing and arc-extinguishing effects to be better exerted, greatly reducing the erosion of the arc on the contact, and further extending the service life of the contactor.
[0006] The utility model is further configured such that a bending portion is formed at the outer peripheral edge of the enhancement plate and extends downward in a curved manner. The bending portion covers the front end and both side regions of the conductive plate. By covering the front end and both sides of the conductive plate with the bending portion, it can more effectively block the direct erosion of the arc on the conductive plate and the contact point. When the contactor conducts on-off operations, the arc usually generates near the contact, but the existence of the bending portion effectively guides the flow path of the arc, reducing the direct impact and erosion of the arc on the conductive plate and the contact point, thereby extending the service life of the contactor.
[0007] The present utility model is further configured such that a contact welding surface is provided on the inner surface of the reinforcement plate. The contact welding surface is located inside the bending portion and is in contact with and electrically connected to the conductive plate. By directly positioning the contact welding surface at one end of the bending portion, the contact area between the conductive plate and the reinforcement plate is maximized, thereby reducing the contact resistance and improving the efficiency and stability of current transmission.
[0008] The present utility model is further configured such that the conductive plate is made of copper material.
[0009] The present utility model is further configured such that the reinforcement plate is made of iron material. Description of the Drawings
[0010] Figure 1 It is a schematic structural diagram of the housing of the embodiment of the present utility model.
[0011] Figure 2 It is an exploded view of the moving contact and the reinforcement plate inside the housing of the embodiment of the present utility model.
[0012] Figure 3 It is a schematic diagram of the cooperation between the moving contact and the reinforcement plate of the embodiment of the present utility model.
[0013] Figure 4 It is an exploded view of the moving contact and the reinforcement plate of the embodiment of the present utility model. Detailed Embodiment
[0014] As Figures 1 - 4 shown, the embodiment of the present utility model provides a moving contact combination structure of a contactor, which includes a housing 1. Three moving contacts 2 are provided inside the housing 1. Each moving contact 2 is composed of two moving contact points 21 and a conductive plate 22 integrally formed with the two moving contact points 21. The conductive plate 22 is made of copper material and has good electrical conductivity. The two moving contact points 21 are respectively located on the left and right sides of the bottom surface of the conductive plate 22.
[0015] Above the conductive plate 22, there is a reinforcement plate 3. The reinforcement plate 3 is made of iron material and has an outer cover type structure, and covers the conductive plate 22. Downwardly bent and extending bending portions 31 are formed at the outer peripheral edges on the left and right sides of the reinforcement plate 3. These bending portions 31 extend out from the edge of the reinforcement plate 3 and cover the upper sides of the left and right regions of the conductive plate 22, and at the same time closely adhere to the upper surface and its adjacent side edges of the conductive plate 22.
[0016] Two contact welding surfaces 32 are provided on the inner surface of the reinforcement plate 3. The positions of the two contact welding surfaces 32 correspond to the positions of the two moving contact points 21 on the bottom surface of the conductive plate 22, and are located inside the bending portions 31 and are in contact with and electrically connected to the conductive plate 22.
[0017] Moreover, the housing 1 is composed of multiple components. The housing 1 includes a base 11, a pedestal 12 covering the base 11, an arc extinguishing chamber seat 13 covering the pedestal 12, and an arc extinguishing chamber cover 14 covering the arc extinguishing chamber seat 13. The moving contact 2 and the reinforcing plate 3 disposed above the moving contact 2 are both located within the arc extinguishing chamber seat 13.
[0018] It should be noted that only one set of the combined structure of the moving contact 2 and the reinforcing plate 3 is detailedly marked in the figure, but the whole structure includes three sets of the same combined structures.
[0019] Of course, in addition to the above embodiments, the present utility model can also have various other embodiments. Without departing from the essence of the technical solution of the present utility model, those skilled in the art can make various corresponding changes and deformations according to the present utility model. And if these changes or deformations are equivalent to the technical solutions in this patent, then these corresponding changes and deformations should all fall within the protection scope of the appended claims of the present utility model.
Claims
1. A moving contact combination structure of a contactor, comprising a housing, wherein a moving contact is arranged in the housing, and the moving contact includes a moving contact point and a conductive plate integrally formed with the moving contact point, and is characterized in that: An enhancement plate is provided on the conductive plate. The enhancement plate has an outer cover type structure and covers the conductive plate.
2. The moving contact combination structure of the contactor according to claim 1, characterized in that: A bent portion that extends downward and bends is formed at the peripheral edge of the enhancement plate. The bent portion covers the front end and both side regions of the conductive plate.
3. The moving contact combination structure of the contactor according to claim 2, characterized in that: A contact welding surface is provided on the inner surface of the enhancement plate. The contact welding surface is located inside the bent portion, and is in contact with and electrically connected to the conductive plate.
4. The moving contact combination structure of the contactor according to claim 1 or 2 or 3, characterized in that: The conductive plate is made of copper material.
5. The moving contact combination structure of the contactor according to claim 1 or 2 or 3, characterized in that: The enhancement plate is made of iron material.