Auxiliary contact of ceramic direct current contactor
By using auxiliary contacts with spring thimble structure in ceramic DC contactors, the problems of easy deformation and high production costs of traditional elastic springs are solved, and higher stability, safety performance and cost-effectiveness are achieved.
Patent Information
- Application Number
- CN202510153342.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-12
- Publication Date
- 2025-04-11
AI Technical Summary
The auxiliary contacts of existing contactors use elastic springs, which are prone to deformation due to frequent external impacts, resulting in poor contact or failure, and silver plating treatment increases production costs.
The auxiliary contacts of ceramic DC contactors are adopted, and the traditional elastic springs are replaced by the design of spring thimble structure, which improves the stability and conductivity of the contactors, and achieves high and low voltage isolation through auxiliary contact plate grooves, reducing production costs.
It improves the stability and safety performance of the contactor, extends the service life of the spring, reduces production costs, and avoids poor contact problems caused by deformation of the elastic spring.
Smart Images
Figure CN119811947A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of contactors, and more particularly to an auxiliary contact of a ceramic DC contactor. Background Art
[0002] The contactor can quickly cut off and connect the AC or DC main circuit to achieve start and stop control of the power load. It is an indispensable electrical component in electrical automation applications. The contactor includes a coil, a static iron core, a moving iron core, main contacts, auxiliary contacts, etc.
[0003] At present, the auxiliary contacts of the contactor mostly use elastic springs to achieve the key function of connecting and disconnecting the circuit. During the operation of the contactor, the elastic springs of the auxiliary contacts will frequently be subjected to strong external force impacts. At the moment of the contactor's closure and release, the armature drives the relevant components to move rapidly, which makes the elastic spring bear a large impact force. Moreover, under the long-term and high-frequency working state of the contactor, this external force impact will repeatedly act on the elastic spring. As time goes by, under the influence of this continuous external force impact, the elastic spring is very likely to deform. Once the elastic spring is deformed excessively, it cannot provide stable and sufficient contact pressure for the moving contact and the static contact, resulting in poor contact of the contacts. In severe cases, the elastic spring will even completely lose its normal elastic function, unable to push or pull the moving contact, causing the auxiliary contact to fail to work normally, and eventually causing the entire contactor to be scrapped. Furthermore, in order to improve the conductivity and corrosion resistance of the elastic spring, it is usually silver-plated. Silver plating increases the production and manufacturing cost of the elastic spring.
[0004] Therefore, an auxiliary contact of a ceramic DC contactor is proposed to solve the problem that the elastic spring of the contactor is easy to deform and the production cost is high. Summary of the invention
[0005] In view of the deficiencies in the prior art, the object of the present invention is to provide an auxiliary contact of a ceramic DC contactor which improves the stability of the contactor, increases the contact area, improves the conductivity and reduces the production cost.
[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an auxiliary contact of a ceramic DC contactor, comprising a contactor connecting plate, a moving component is arranged at the center of the contactor connecting plate, an arc extinguishing cover is arranged at the top of the contactor connecting plate, the moving component is arranged inside the arc extinguishing cover, a plurality of groups of main contacts are arranged at the top of the moving component, an auxiliary contact plate is installed at the top of the moving component, a plurality of groups of auxiliary contact assemblies are arranged at the top of the auxiliary contact plate, the plurality of groups of main contacts and the plurality of groups of auxiliary contact assemblies are arranged vertically, and the plurality of groups of main contacts and the plurality of groups of auxiliary contact assemblies are all installed at the top of the arc extinguishing cover; the moving component comprises a supporting portion and an auxiliary contact block portion, and the auxiliary contact block portion is installed at the top of the supporting portion.
[0007] By adopting the above technical solution, the auxiliary contact assembly of the spring ejector structure solves the problem that the elastic spring is easily deformed by impact and needs silver plating when working, thereby improving the stability of the contactor and reducing the production cost.
[0008] The present invention is further configured as follows: the motion component also includes a transmission component, a buffer spring and a main contact plate, the buffer spring is installed at the top of the transmission component, the main contact plate is installed on the side of the buffer spring away from the transmission component, the support part is installed at the top of the transmission component, and the support part covers the buffer spring and the main contact plate.
[0009] The present invention is further configured as follows: the support portion includes multiple groups of supporting legs, the top ends of the multiple groups of supporting legs are connected to connecting plates, the connecting plates are configured as an arch structure, the top ends of the connecting plates are configured with two groups of hook plates, and the two groups of hook plates are symmetrically configured along the center line of the connecting plates.
[0010] The present invention is further configured as follows: the auxiliary contact block portion includes multiple groups of protective columns, circular contact grooves are opened on the top of the protective columns, transition plates are connected between the multiple groups of protective columns, and a group of abutment plates are respectively arranged on both sides of the transition plate, and the two groups of abutment plates are arranged close to the bottom of the transition plate.
[0011] The present invention is further configured as follows: a plurality of groups of diagonal support blocks are arranged at the top end of the abutment sheet, heat dissipation grooves are arranged between the plurality of groups of diagonal support blocks, auxiliary touch plate grooves are opened inside the protective column and the transition plate, the auxiliary touch plate grooves are adapted to the shape of the auxiliary contact plate, and two groups of hook claw grooves are opened at the bottom end of the transition plate and the abutment sheet, the hook claw grooves are adapted to the shape of the hook claw sheet.
[0012] By adopting the above technical solution, the auxiliary contact plate groove separates the auxiliary contact plate from the main contact plate, realizes the function of high and low voltage isolation, and improves the safety performance of the contactor.
[0013] The present invention is further configured as follows: a disconnect spring is installed inside the contact groove, the outer diameter of the disconnect spring is not larger than the opening diameter of the contact groove, and the inner diameter of the disconnect spring is larger than the outer wall diameter of the first connecting column.
[0014] By adopting the above technical solution, the elastic potential energy of the disconnecting spring is improved, the disconnecting capacity between the main contact and the main contact plate is improved, and the service life of the spring on the side of the contactor connecting plate away from the transmission component and the internal spring is also improved.
[0015] The present invention is further configured as follows: the auxiliary contact assembly includes an auxiliary contact, a clamping ring is connected to the bottom end of the auxiliary contact, a first connecting column is arranged on the side of the clamping ring away from the auxiliary contact, the first connecting column is arranged as a hollow cylindrical structure with a closed top, and a second connecting column is arranged inside the first connecting column.
[0016] The present invention is further configured as follows: a concave edge is arranged around the bottom end of the first connecting column, a convex ring is arranged around the top end of the second connecting column, and internal springs are installed inside the first connecting column and the second connecting column.
[0017] The present invention is further configured as follows: the diameter of the clamping ring is larger than the outer wall diameter of the first connecting column, the second connecting column is a hollow structure with a closed bottom, the outer wall diameter of the second connecting column is smaller than the inner wall diameter of the first connecting column, the inner wall diameter of the concave edge is consistent with the outer wall diameter of the second connecting column, and the outer wall diameter of the convex ring is consistent with the inner wall diameter of the first connecting column.
[0018] In summary, the present application includes at least one of the following beneficial technical effects: 1. The auxiliary contact assembly with spring ejector structure solves the problem that the elastic spring is easily deformed by impact and needs silver plating when working, thereby improving the stability of contactor use and reducing production costs 2. The auxiliary contact plate is separated from the main contact plate through the auxiliary contact plate groove to achieve the function of high and low voltage isolation and improve the safety performance of the contactor.
[0019] 3. The breaking capacity between the main contact and the main contact plate is improved by the elastic potential energy of the breaking spring, and the service life of the spring on the side of the contactor connecting plate away from the transmission component and the internal spring is also improved. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a structural schematic diagram of the auxiliary contacts of the ceramic DC contactor of the present invention; Figure 2 It is a schematic diagram of the internal structure of the auxiliary contact of the ceramic DC contactor of the present invention; Figure 3 It is a structural schematic diagram of the auxiliary contact assembly in the present invention; Figure 4 for Figure 2 Section view in the AA cutting direction; Figure 5 It is an exploded schematic diagram of the support portion, the auxiliary contact block portion and the auxiliary contact plate in the present invention; Figure 6 is a cross-sectional view of the auxiliary contact block portion of the present invention; Description of reference numerals: 1. contactor connecting plate; 2. Motion assembly; 21. Transmission assembly; 22. Buffer spring; 23. Main contact plate; 24. Support part; 241. Support foot; 242. Connecting piece; 243. Hooking claw piece; 25. Auxiliary contact block; 251. Protective column; 252. Contact groove; 253. Transition plate; 254. Abutting piece; 255. Diagonal support block; 256. Heat dissipation groove; 257. Auxiliary contact plate groove; 258. Hooking claw groove; 259. Disconnecting spring; 3. Arc extinguishing hood; 4. Main contacts; 5. Auxiliary contact assembly; 51. Auxiliary contact; 52. Clamp ring; 53. First connecting column; 531. Concave edge; 54. Second connecting column; 541. Protruding ring; 55. Internal spring; 6. Auxiliary contact plate. DETAILED DESCRIPTION
[0021] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.
[0022] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.
[0023] See also Figure 1-6 , the present invention provides the following technical solutions: Embodiment 1: The original contactor is generally an elastic spring. When the contactor is working, the elastic spring is usually subjected to a large external force impact. Long-term use will cause the elastic spring to deform and fail to work normally, resulting in scrapping.
[0024] Therefore, see Figure 1-4, including a contactor connecting plate 1, the contactor connecting plate 1 is installed with the contactor base, a moving component 2 is arranged at the center of the contactor connecting plate 1, the moving component 2 receives the driving force when the contactor base is attracted, and drives the moving component 2 and other components installed thereon to move, an arc extinguishing cover 3 is arranged at the top of the contactor connecting plate 1, the arc extinguishing cover 3 isolates the internal circuit and the external environment, and protects the external device from being damaged by the arc generated when the contactor is working, the moving component 2 is arranged inside the arc extinguishing cover 3, and a plurality of groups of main contacts 4 are arranged at the top of the moving component 2, and the plurality of groups of main contacts 4 It is connected to the external power wires to provide the function of connection or disconnection. An auxiliary contact plate 6 is installed on the top of the moving component 2. The auxiliary contact plate 6 realizes the connection or disconnection between multiple groups of auxiliary contact components 5 by contacting the auxiliary contact components 5. Multiple groups of auxiliary contact components 5 are arranged on the top of the auxiliary contact plate 6. The multiple groups of auxiliary contact components 5 are connected to the external control wires to facilitate the external controller to receive the current state signal of the contactor. Multiple groups of main contacts 4 and multiple groups of auxiliary contact components 5 are vertically arranged, and multiple groups of main contacts 4 and multiple groups of auxiliary contact components 5 are all installed on the top of the arc extinguishing cover 3.
[0025] See also Figure 4 The motion component 2 includes a transmission component 21, a buffer spring 22 is fixedly connected to the top of the transmission component 21, a main contact plate 23 is fixedly connected to the side of the buffer spring 22 away from the transmission component 21, and a support portion 24 is fixedly connected to the top of the transmission component 21, and the support portion 24 covers the buffer spring 22 and the main contact plate 23.
[0026] See also Figure 3 The auxiliary contact assembly 5 includes an auxiliary contact 51, a retaining ring 52 is connected to the bottom end of the auxiliary contact 51, a first connecting column 53 is arranged on the side of the retaining ring 52 away from the auxiliary contact 51, the first connecting column 53 is arranged to be a hollow cylindrical structure with a closed top, the diameter of the retaining ring 52 is larger than the outer wall diameter of the first connecting column 53, a second connecting column 54 is slidably connected to the inner wall of the first connecting column 53, the second connecting column 54 is a hollow structure with a closed bottom, the outer wall diameter of the second connecting column 54 is smaller than the inner wall diameter of the first connecting column 53, a concave edge 531 is arranged around the bottom end of the first connecting column 53, a convex ring 541 is arranged around the top end of the second connecting column 54, the inner wall diameter of the concave edge 531 is consistent with the outer wall diameter of the second connecting column 54, the outer wall diameter of the convex ring 541 is consistent with the inner wall diameter of the first connecting column 53, and an internal spring 55 is installed inside the first connecting column 53 and the second connecting column 54.
[0027] When in use, the contactor is attracted to push the transmission assembly 21 to move, and the movement of the transmission assembly 21 drives the main contact plate 23 and the support part 24 to move synchronously. The main contact plate 23 contacts multiple groups of main contacts 4, and multiple groups of main contacts 4 are turned on. The transmission assembly 21 and the support part 24 continue to move in the original direction, and the buffer spring 22 is used to alleviate the excess movement distance of the main contact plate 23, so as to ensure that multiple groups of main contacts 4 can connect the circuit through the main contact plate 23. The support part 24 is fixed with the auxiliary contact block part 25, and the movement of the support part 24 drives the auxiliary contact plate 6 to move together. When the auxiliary contact plate 6 contacts multiple groups of auxiliary contact assemblies 5, multiple groups of auxiliary contact assemblies 5 are turned on, and the auxiliary contact plate 6 continues to move in the original direction, and the excess movement distance is alleviated by the internal spring 55, and at the same time, the auxiliary contact assembly 5 is better in contact with the auxiliary contact plate 6, so as to ensure the minimum voltage or current loss. The auxiliary contact assembly 5 with the spring ejector structure solves the problem that the elastic spring is easily deformed by impact when working, and improves the stability of the contactor.
[0028] In the second embodiment, the main contact plate 23 and the auxiliary contact plate 6 inside the contactor respectively control the connection or disconnection of the main contact 4 and the auxiliary contact assembly 5. The distance between the main contact plate 23 and the auxiliary contact plate 6 is not large. In order to improve the safety performance of the equipment, the main contact plate 23 and the auxiliary contact plate 6 inside the contactor need to be isolated from high and low voltages.
[0029] Therefore, see Figure 4 An auxiliary contact block portion 25 is fixedly connected to the side of the support portion 24 away from the main contact plate 23 .
[0030] See also Figure 5 The support portion 24 includes multiple groups of supporting legs 241, and the tops of the multiple groups of supporting legs 241 are connected to connecting pieces 242. The connecting piece 242 is set as an arch structure. The top of the connecting piece 242 is provided with two groups of hook pieces 243. The two groups of hook pieces 243 are symmetrically arranged along the center line of the connecting piece 242.
[0031] See also Figure 5 The auxiliary contact block portion 25 includes multiple groups of protective columns 251, and a circular contact groove 252 is opened at the top of the protective column 251. A transition plate 253 is connected between the multiple groups of protective columns 251. A group of abutment sheets 254 are respectively arranged on both sides of the transition plate 253, and the two groups of abutment sheets 254 are arranged near the bottom of the transition plate 253.
[0032] See also Figure 5-6 A plurality of groups of diagonal support blocks 255 are arranged at the top of the abutment piece 254, and heat dissipation grooves 256 are arranged between the plurality of groups of diagonal support blocks 255. Auxiliary touch plate grooves 257 are opened inside the protective column 251 and the transition plate 253, and the auxiliary touch plate grooves 257 are adapted in shape to the auxiliary contact plate 6. Two groups of hook claw grooves 258 are opened at the bottom of the transition plate 253 and the abutment piece 254, and the hook claw grooves 258 are adapted in shape to the hook claw piece 243.
[0033] See also Figure 5 A disconnect spring 259 is installed inside the contact groove 252 , the outer diameter of the disconnect spring 259 is not larger than the opening diameter of the contact groove 252 , and the inner diameter of the disconnect spring 259 is larger than the outer wall diameter of the first connecting column 53 .
[0034] Through multiple groups of supporting legs 241 fixedly connected to the transmission component 21, the driving force generated by the contactor's attraction is transmitted from the transmission component 21 to the support part 24, and the symmetrically arranged hook pieces 243 are fixedly connected to the auxiliary contact block part 25 through the hook claw groove 258, thereby driving the auxiliary contact block part 25 to move; wherein, the hook claw groove 258 is arranged in an arc shape, which facilitates the installation of the hook claw piece 243 into the hook claw groove 258, thereby improving the equipment installation efficiency.
[0035] The protective column 251 and the contact groove 252 provide an installation environment for the disconnecting spring 259, and at the same time, leave space for the connection or disconnection of multiple groups of auxiliary contact assemblies 5. The abutment sheet 254 increases the contact area between the bottom of the auxiliary contact block 25 and the support portion 24, that is, increases the force-bearing area of the auxiliary contact block 25, so that the auxiliary contact block 25 receives the force of the support portion 24 more evenly, thereby increasing the service life of the auxiliary contact block 25. The strength of the abutment sheet 254 is increased by providing multiple groups of diagonal support blocks 255 for the abutment sheet 254, further increasing the service life of the auxiliary contact block 25. The heat dissipation of the auxiliary contact plate 6 is increased by the heat dissipation groove 256 set between each two groups of diagonal support blocks 255, and at the same time, the stress concentration problem of the diagonal support blocks 255 is reduced. The auxiliary contact plate groove 257 is provided in the auxiliary contact block 25 to provide an installation environment for the auxiliary contact plate 6, so that the auxiliary contact plate 6 is separated from the main contact plate 23, realizing the function of high and low voltage isolation, and improving the safety performance of the contactor.
[0036] When in use, the contactor is energized, and the support portion 24 pushes the auxiliary contact portion 25 to move toward the top, and the auxiliary contact plate 6 inside the auxiliary contact portion 25 contacts the multiple auxiliary contact assemblies 5, so that the auxiliary contact assemblies 5 are connected. At this time, the breaking spring 259 contacts the top of the arc extinguishing cover 3 and the breaking spring 259 is compressed; when the contactor is released, the spring installed on the side of the contactor connecting plate 1 away from the transmission assembly 21 is reset, so that the support portion 24 pulls back the auxiliary contact portion 25 in the opposite direction, and at the same time, the elastic potential energy generated by the compression of the breaking spring 259 is also The auxiliary contact block portion 25 is pushed in a direction away from the auxiliary contact assembly 5, thereby increasing the service life of the spring on the side of the contactor connecting plate 1 away from the transmission assembly 21 and the internal spring 55, and at the same time improving the load-breaking capability of the contactor, that is, when the contactor is energized, the main contact 4 contacts the main contact plate 23, and current flows between the main contact 4 and the main contact plate 23. When the contactor is released, the main contact 4 and the main contact plate 23 are affected by the current and adhesion will occur. The elastic potential energy of the breaking spring 259 is used to improve its breaking capability.
[0037] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.
Claims
1. An auxiliary contact of a ceramic DC contactor, characterized in that: The invention comprises a contactor connecting plate (1), wherein a moving component (2) is arranged at the center of the contactor connecting plate (1), an arc extinguishing cover (3) is arranged at the top of the contactor connecting plate (1), the moving component (2) is arranged inside the arc extinguishing cover (3), a plurality of groups of main contacts (4) are arranged at the top of the moving component (2), an auxiliary contact plate (6) is installed at the top of the moving component (2), a plurality of groups of auxiliary contact components (5) are arranged at the top of the auxiliary contact plate (6), the plurality of groups of main contacts (4) and the plurality of groups of auxiliary contact components (5) are arranged vertically, and the plurality of groups of main contacts (4) and the plurality of groups of auxiliary contact components (5) are both installed at the top of the arc extinguishing cover (3); The motion component (2) comprises a support portion (24) and an auxiliary contact portion (25), wherein the auxiliary contact portion (25) is mounted on the top end of the support portion (24).
2. The auxiliary contact of a ceramic DC contactor according to claim 1, characterized in that: The motion assembly (2) further comprises a transmission assembly (21), a buffer spring (22) and a main contact plate (23), wherein the buffer spring (22) is mounted on the top end of the transmission assembly (21), the main contact plate (23) is mounted on a side of the buffer spring (22) away from the transmission assembly (21), and the support portion (24) is mounted on the top end of the transmission assembly (21), and the support portion (24) covers the buffer spring (22) and the main contact plate (23).
3. The auxiliary contact of a ceramic DC contactor according to claim 2, characterized in that: The support portion (24) comprises a plurality of groups of supporting feet (241), the top ends of the plurality of groups of supporting feet (241) are connected to connecting pieces (242), the connecting pieces (242) are arranged as arch structures, the top ends of the connecting pieces (242) are provided with two groups of hook claw pieces (243), the two groups of hook claw pieces (243) are symmetrically arranged along the center line of the connecting piece (242).
4. The auxiliary contact of a ceramic DC contactor according to claim 3, characterized in that: The auxiliary contact block portion (25) comprises a plurality of groups of protective columns (251), the tops of the protective columns (251) being provided with circular contact grooves (252), a transition plate (253) being connected between the plurality of groups of protective columns (251), a group of abutment sheets (254) being respectively provided on both sides of the transition plate (253), and two groups of abutment sheets (254) being provided close to the bottom of the transition plate (253).
5. The auxiliary contact of a ceramic DC contactor according to claim 4, characterized in that: A plurality of groups of diagonal support blocks (255) are arranged at the top of the abutment sheet (254), and heat dissipation grooves (256) are arranged between the plurality of groups of diagonal support blocks (255). Auxiliary touch plate grooves (257) are provided inside the protection column (251) and the transition plate (253), and the auxiliary touch plate grooves (257) are adapted in shape to the auxiliary contact plate (6). Two groups of hooking claw grooves (258) are provided at the bottom of the transition plate (253) and the abutment sheet (254), and the hooking claw grooves (258) are adapted in shape to the hooking claw sheet (243).
6. The auxiliary contact of a ceramic DC contactor according to claim 5, characterized in that: A disconnect spring (259) is installed inside the contact groove (252); the outer diameter of the disconnect spring (259) is no larger than the opening diameter of the contact groove (252); and the inner diameter of the disconnect spring (259) is larger than the outer wall diameter of the first connecting column (53).
7. The auxiliary contact of a ceramic DC contactor according to claim 1, characterized in that: The auxiliary contact assembly (5) comprises an auxiliary contact (51), the bottom end of the auxiliary contact (51) being connected to a clamping ring (52), a first connecting column (53) being arranged on a side of the clamping ring (52) away from the auxiliary contact (51), the first connecting column (53) being arranged as a hollow cylindrical structure with a closed top, and a second connecting column (54) being arranged inside the first connecting column (53).
8. The auxiliary contact of a ceramic DC contactor according to claim 7, characterized in that: The bottom end of the first connecting column (53) is surrounded by a concave edge (531), the top end of the second connecting column (54) is surrounded by a convex ring (541), and internal springs (55) are installed inside the first connecting column (53) and the second connecting column (54).
9. The auxiliary contact of a ceramic DC contactor according to claim 8, characterized in that: The diameter of the clamping ring (52) is larger than the outer wall diameter of the first connecting column (53); the second connecting column (54) is a hollow structure with a closed bottom; the outer wall diameter of the second connecting column (54) is smaller than the inner wall diameter of the first connecting column (53); the inner wall diameter of the concave edge (531) is consistent with the outer wall diameter of the second connecting column (54); and the outer wall diameter of the convex ring (541) is consistent with the inner wall diameter of the first connecting column (53).