CN111192765A - Contact finger assembly - Google Patents
Contact finger assembly Download PDFInfo
- Publication number
- CN111192765A CN111192765A CN202010107065.1A CN202010107065A CN111192765A CN 111192765 A CN111192765 A CN 111192765A CN 202010107065 A CN202010107065 A CN 202010107065A CN 111192765 A CN111192765 A CN 111192765A
- Authority
- CN
- China
- Prior art keywords
- contact
- contact finger
- annular groove
- base
- finger
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
- H01H1/36—Contacts characterised by the manner in which co-operating contacts engage by sliding
- H01H1/38—Plug-and-socket contacts
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
- H01H1/36—Contacts characterised by the manner in which co-operating contacts engage by sliding
- H01H1/46—Contacts characterised by the manner in which co-operating contacts engage by sliding self-aligning contacts
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- Contacts (AREA)
Abstract
The invention discloses a contact finger assembly, which comprises a contact seat, wherein an annular groove is formed in the inner end part of the contact seat, and the bottom surface of the annular groove is a conductive surface; the annular groove is internally provided with a base, one side of the base facing the conductive surface is connected with an elastic needle, the end part of the elastic needle is connected with a contact finger, the contact finger is tightly pressed on the conductive surface through the elastic needle, and a gap is arranged between the contact finger and the inner side wall of the annular groove, so that the contact finger can slide on the conductive surface. The invention is suitable for high-voltage transmission line equipment or high-voltage transmission lines, and has the advantages of automatic centering, high through-current, long service life and the like.
Description
Technical Field
The invention relates to a contact finger assembly, in particular to an automatic centering high-current long-service-life contact finger assembly for high-voltage transmission line equipment.
Background
At present, contact fingers used in internal and external high-voltage switch equipment or high-voltage transmission lines are basically divided into spring contact fingers, watchband contact fingers and plum blossom contact fingers, the contact fingers almost have no deflection angle, the foundation and environment requirements of the switch equipment or the transmission lines are high, once foundation settlement, support height difference, long deflection deformation of the lines, small angle adjustment and the like occur, friction force of the contact fingers is increased, a large amount of metal dust is generated in contact movement, high-voltage breakdown is caused, even a large explosion accident is caused due to stress damage of an insulating part, and the accident is common in the high-voltage switch equipment or the high-voltage transmission lines.
In addition, in the process of manufacturing equipment, the concentricity of the shell and the conductor is difficult to guarantee, the common contact finger cannot adjust the error of the common contact finger, great trouble is caused to the processing and the manufacturing, and once the events occur, the insulating part is often stressed too much to cause great equipment failure.
In addition, the mechanical service life which is difficult to pass the standard requirement of the high-voltage transmission line is determined by the contact mode of other contact fingers.
Therefore, the requirements of complex and changeable arrangement environment and high-flux and long service life of the existing high-voltage transmission line circuit are difficult to meet.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a contact finger assembly which is suitable for high-voltage transmission line equipment or high-voltage transmission lines and has the advantages of automatic centering, high through-current, long service life and the like.
The technical scheme adopted by the invention is as follows: a contact finger assembly comprises a contact seat, wherein an annular groove is formed in the inner end part of the contact seat, and the bottom surface of the annular groove is a conductive surface; the annular groove is internally provided with a base, one side of the base facing the conductive surface is connected with an elastic needle, the end part of the elastic needle is connected with a contact finger, the contact finger is tightly pressed on the conductive surface through the elastic needle, and a gap is arranged between the contact finger and the inner side wall of the annular groove, so that the contact finger can slide on the conductive surface.
Further, the inner ring of the contact seat adopts a wedge-shaped structure.
Further, still be provided with the snap ring in the annular groove, the snap ring sets up the base is kept away from the one side of conducting surface, the base with be provided with the stopper between the snap ring, the stopper with the snap ring provides pressure for touching the finger subassembly in equipment operation.
Further, the elastic needle and the base adopt a mechanical compression joint structure.
Furthermore, the elastic needle adopts a U-shaped structure.
Furthermore, the contact finger adopts a chip-mounted structure and consists of a plurality of contact pieces; the contact finger is close to one side of conducting surface is provided with the design ring, the contact is connected on the design ring, through the design ring is right the contact is stereotyped.
Furthermore, the contact finger is made of copper or copper alloy silver plating.
The invention has the beneficial effects that:
(1) according to the contact finger assembly, a certain gap (shown in figure 2) is reserved between the contact seat and the contact finger, when the contact head and the contact seat are not aligned, the contact finger is driven by the contact head to automatically adjust the alignment, and the contact finger slides on the contact surface of the contact seat by means of the pressure of the elastic needle, so that the automatic alignment of equipment is finally achieved without influencing the current capacity, and the problem of flexible connection between high-voltage switch equipment and a power transmission line contact is fundamentally solved;
(2) according to the contact finger assembly, the contact finger adopts a chip-mounted structure, through adjusting the number of the contact pieces and the size of the matched contact seat of the contact, the through-current range of 1000A to 30000A can be realized, and the problem that the flexible connection of high-voltage switch equipment and a power transmission line contact is difficult to increase capacity is solved;
(3) according to the contact finger assembly, the contact seat adopts a wedge-shaped structure (shown in figure 2), when transverse displacements such as deflection angle, foundation settlement, thermal expansion and the like occur, the contact can freely rotate in the contact seat within a certain range, the stress generated by the transverse displacement is effectively absorbed, and the problem of stress caused by the fact that the arrangement mode of a power transmission line is duplicated variably is solved;
(4) according to the contact finger assembly, the contact piece is shaped through the shaping ring, so that the contact finger is effectively in close contact with the contact, the through-current capacity is ensured, meanwhile, the elastic force of the elastic needle prevents the contact from being scratched due to overlarge stress, the contact finger is effectively ensured to be in good contact with the contact, and the interface is friendly;
(5) according to the contact finger assembly, through reasonable design of the size of the base, the contact can be guaranteed to freely slide in the hole, the contact can be limited, deformation caused by overlarge stress of the contact finger is prevented, and the problem of electrodynamic force in a power transmission line is effectively solved;
(6) according to the contact finger assembly, the stop block and the clamping ring provide certain pressure for the contact finger assembly in the operation of equipment, so that good contact between the contact finger and the contact seat is ensured, and the through-flow effect is ensured;
(7) according to the contact finger assembly, the elastic needle adopts a U-shaped structure, so that the elasticity of the elastic needle is ensured, the excessive pressure of the contact finger is prevented, and the condition that the silver plating surface is scratched when the contact finger rubs on the conductive surface of the contact base, the through-flow efficiency is influenced, and metal chips are generated is avoided.
Drawings
FIG. 1: the invention discloses a schematic diagram of the use state of a contact finger assembly;
FIG. 2: the invention discloses a contact finger assembly structure schematic diagram;
FIG. 3: the invention discloses a contact finger assembly diagram;
the attached drawings are marked as follows:
1-a base;
2-a bullet needle;
3-contact finger;
4-contact seat;
5-contact;
6-shaping ring;
7-a snap ring;
8-stop block;
9-gap;
10-wedge configuration.
Detailed Description
In order to further understand the contents, features and effects of the present invention, the following embodiments are illustrated and described in detail with reference to the accompanying drawings:
as shown in fig. 1 to 3, a contact finger assembly includes a base 1, a pogo pin 2, a contact finger 3, a contact seat 4, a setting ring 6, a snap ring 7 and a stopper 8.
An annular groove is formed in the inner end portion of the contact seat 4, and the bottom surface of the annular groove is a conductive surface. The inner ring of the contact seat 4 adopts a wedge-shaped structure 10 so as to facilitate the deflection of the contact 5; when transverse displacement such as deflection angle, foundation settlement, thermal expansion and contraction occurs, the contact 5 can freely rotate in the contact seat 4 within a certain range, stress generated by the transverse displacement is effectively absorbed, and the problem of stress caused by the fact that the arrangement mode of the power transmission line is duplicated changeably is solved.
The base 1 is of an annular structure, and through reasonable design of the size of the base 1, the contact 5 can be guaranteed to freely slide in a hole of the contact, the position of the contact can be limited, the contact finger 3 is prevented from being deformed due to overlarge stress, and the problem of electrodynamic force in a power transmission line is effectively solved.
The elastic needle 2 adopts a U-shaped structure, so that the elasticity of the elastic needle 2 is ensured, the overlarge pressure of the contact finger 3 is prevented, and the phenomenon that the silver plating surface is scratched when the contact finger 3 is in friction with the conductive surface of the contact base 4, the through-flow efficiency is influenced, and metal chips are generated is avoided.
The end part of the elastic needle 2 is connected with the contact finger 3, the contact finger 3 is tightly pressed on the conductive surface through the elastic needle 2, the contact between the contact finger 3 and the contact seat 4 is improved to the maximum extent, the conductivity is improved, and the contact resistance is reduced.
A certain gap 9 is reserved between the contact finger 3 and the inner side wall of the annular groove of the contact seat 4, so that the contact finger 3 can slide on the conductive surface and is used for adjusting the poor alignment between the contact 5 and the contact seat 4; when the contact 5 and the contact seat 4 are not aligned, the contact 5 drives the contact finger 3 to automatically adjust and align, and the contact finger 3 slides on the contact surface of the contact seat 4 by the pressure of the elastic needle 2, so that the automatic alignment of the equipment is finally achieved without influencing the through-current capacity, and the problem of flexible connection between the high-voltage switch equipment and the power transmission line contact is fundamentally solved.
The contact finger 3 adopts a chip-mounted structure and is composed of a plurality of contact pieces, the material is copper or copper alloy silver plating, the mechanical strength and the electric conductivity of the contact finger 3 are increased, and the contact finger 3 is prevented from being broken due to extrusion and friction. The quantity of contact pieces is increased or decreased according to the through-flow requirement, so that the parts are designed in a standardized manner, and the failure rate of equipment is reduced. Through adjusting the number of the contact pieces and the sizes of the matched contact 5 and the contact seat 4, the through-current range of 1000A to 30000A can be realized, and the problem that the flexible connection of high-voltage switch equipment and a power transmission line contact is difficult to increase capacity is solved.
Touch and indicate 3 to be close to one side setting of conducting surface the design ring 6, the contact is connected on the design ring 6, through the design ring 6 is right the contact design, effectual messenger touches and indicates 3 and contact 5 in close contact with, has guaranteed the through-current capacity, and simultaneously, the elasticity of bullet needle 2 has prevented again that the atress is too big and fish tail contact 5, has effectually guaranteed to touch and has indicate good contact between 3 and the contact 5, and the interface is friendly.
The snap ring 7 sets up base 1 keeps away from one side of conducting surface, base 1 with set up between the snap ring 7 stopper 8, stopper 8 with the snap ring 7 provides certain pressure for touching the finger subassembly in equipment operation, has guaranteed to touch and has pointed 3 and touch the good contact between the seat 4, has guaranteed the through-flow effect.
Although the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and those skilled in the art can make many modifications without departing from the spirit and scope of the present invention as defined in the appended claims.
Claims (7)
1. The contact finger assembly is characterized by comprising a contact seat (4), wherein an annular groove is formed in the inner end part of the contact seat (4), and the bottom surface of the annular groove is a conductive surface; be provided with base (1) in the annular groove, base (1) towards one side of conducting surface is connected with bullet needle (2), the end connection of bullet needle (2) has and touches and indicates (3), it passes through to touch indicate (3) bullet needle (2) sticiss on the conducting surface, touch indicate (3) with be provided with clearance (9) between the inside wall of annular groove, make it can to touch indicate (3) slide on the conducting surface.
2. Contact finger assembly according to claim 1, characterised in that the inner ring of the contact base (4) is of wedge-shaped construction (10).
3. The contact finger assembly according to claim 1, wherein a snap ring (7) is further arranged in the annular groove, the snap ring (7) is arranged on one side of the base (1) far away from the conductive surface, a stopper (8) is arranged between the base (1) and the snap ring (7), and the stopper (8) and the snap ring (7) provide pressure for the contact finger assembly in equipment operation.
4. Contact finger assembly according to claim 1, characterised in that the spring finger (2) is mechanically crimped to the base (1).
5. Contact finger assembly according to claim 1, characterised in that the spring finger (2) adopts a "U" shaped configuration.
6. A finger assembly according to claim 1, characterised in that the finger (3) is of a chip-on-chip construction, consisting of a plurality of contact blades; the contact finger (3) is close to one side of conducting surface is provided with design ring (6), the contact is connected on design ring (6), through design ring (6) are right the contact is stereotyped.
7. Contact finger assembly according to claim 1, characterised in that the contact finger (3) is made of copper or a copper alloy plated with silver.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010107065.1A CN111192765A (en) | 2020-02-21 | 2020-02-21 | Contact finger assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010107065.1A CN111192765A (en) | 2020-02-21 | 2020-02-21 | Contact finger assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111192765A true CN111192765A (en) | 2020-05-22 |
Family
ID=70710149
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010107065.1A Pending CN111192765A (en) | 2020-02-21 | 2020-02-21 | Contact finger assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111192765A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113223892A (en) * | 2021-05-25 | 2021-08-06 | 上海电器科学研究所（集团）有限公司 | Quick vacuum arc control device that does not have spring |
| CN113839242A (en) * | 2021-09-29 | 2021-12-24 | 天津尚圣科技有限公司 | Contact finger for high-voltage electrical equipment and particle capturing structure thereof |
-
2020
- 2020-02-21 CN CN202010107065.1A patent/CN111192765A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113223892A (en) * | 2021-05-25 | 2021-08-06 | 上海电器科学研究所（集团）有限公司 | Quick vacuum arc control device that does not have spring |
| CN113839242A (en) * | 2021-09-29 | 2021-12-24 | 天津尚圣科技有限公司 | Contact finger for high-voltage electrical equipment and particle capturing structure thereof |
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| CB02 | Change of applicant information |
Address after: 300190 5-1-705b-05, saide square, southwest of the intersection of Hongqi Road and tiantuobei Road, Nankai District, Tianjin Applicant after: Tianjin Shangsheng Technology Co., Ltd Address before: Zone 5-1-705b, saide square, southwest of the intersection of Hongqi Road and tiantuo North Road, Nankai District, Tianjin 300000-05 Applicant before: Tianjin Jiaxun Trading Co.,Ltd. |
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| CB02 | Change of applicant information |