CN114068223A

CN114068223A - Disconnecting link fastening device

Info

Publication number: CN114068223A
Application number: CN202111362197.XA
Authority: CN
Inventors: 魏兴元; 郑凯成
Original assignee: Guangdong Power Grid Co Ltd; Qingyuan Power Supply Bureau of Guangdong Power Grid Co Ltd
Current assignee: Guangdong Power Grid Co Ltd; Qingyuan Power Supply Bureau of Guangdong Power Grid Co Ltd
Priority date: 2021-11-17
Filing date: 2021-11-17
Publication date: 2022-02-18

Abstract

The invention belongs to the technical field of distribution equipment and discloses a disconnecting link fastening device which comprises a disconnecting link base, a fixed contact, a moving contact and a first clamping mechanism, wherein the disconnecting link base is provided with a fixed seat and a hinged seat, the fixed contact comprises a fixed contact and a first clamping mechanism, the fixed contact and the first clamping mechanism are both arranged on the fixed seat, the moving contact comprises moving contacts, the moving contacts are symmetrically arranged, the first ends of the moving contacts are hinged with the hinged seat, the second ends of the moving contacts are provided with second clamping mechanisms which can be clamped with the first clamping mechanism, and the first clamping mechanism is arranged on the moving contacts. According to the disconnecting link fastening device provided by the invention, the two side surfaces of the static contact piece are respectively abutted against the inner side surfaces of the two movable contact pieces, and the first buckle mechanism is clamped with the second buckle mechanism, so that the static contact piece and the movable contact piece are effectively prevented from being separated; and the two movable contact pieces clamp the static contact piece through the first clamping mechanism, so that the static contact piece and the movable contact piece are effectively prevented from being contacted and loosened.

Description

Disconnecting link fastening device

Technical Field

The invention relates to the technical field of power distribution equipment, in particular to a disconnecting link fastening device.

Background

With the continuous development of society and the rapid development of power supply industry, the demand of users on power supply quality is higher and higher. Planned power failure and fault power failure have great influence on electricity consumption of users, uncontrollable factors and uncertainty exist in fault power failure, recovery cannot be achieved in time, and user experience is seriously influenced.

At present, the replacement of power equipment and the improvement of manufacturing process and operation level have a great deal of maintenance-free electrical equipment to be put into operation, so that the faults are greatly reduced, and the overhaul workload is also obviously reduced. However, the fault of the isolation disconnecting link which is used as the most used switch in the high-voltage switch electrical apparatus frequently occurs, because the isolation disconnecting link is repeatedly used, the condition that the static contact and the moving contact are loose can occur, and the power grid is broken, and at this time, maintenance personnel need to power off for maintenance, which has great influence on the electricity consumption of users.

Disclosure of Invention

The invention aims to provide a disconnecting link fastening device which can effectively prevent a static contact and a moving contact from being contacted and loosened and effectively ensure the stability, reliability and continuity of power supply of a power distribution network.

In order to achieve the purpose, the invention adopts the following technical scheme:

a knife switch fastening device comprising:

the disconnecting link base is provided with a fixed seat and a hinged seat;

the static contact comprises a static contact piece and a first buckling mechanism, and the static contact piece and the first buckling mechanism are both arranged on the fixed seat;

the moving contact comprises two moving contact pieces which are symmetrically arranged, the first end of each moving contact piece is hinged with the hinge base, the second end of each moving contact piece is provided with a second buckle mechanism which can be clamped with the first buckle mechanism, and when the first buckle mechanism is clamped with the second buckle mechanism, the two side surfaces of the static contact piece respectively abut against the inner side surfaces of the two moving contact pieces;

and the first clamping mechanism is arranged on the movable contact and can enable the two movable contacts to clamp the static contact.

Optionally, the first clamping mechanism comprises:

the limiting sleeve is arranged between the two movable contact pieces;

the outer side surfaces of the two movable contact pieces are respectively provided with a first elastic piece;

the first end of the first fastening rod is connected with a first fastener, and the second end of the first fastening rod sequentially penetrates through the first elastic piece on one side, the movable contact spring on one side, the limiting sleeve, the movable contact spring on the other side and the first elastic piece on the other side to be connected with a second fastener.

Optionally, the first fastening piece comprises a first fastening block and first circular rings arranged on two sides of the first fastening block, a first through hole is formed in the first fastening block, an internal thread is arranged in the first through hole, an external thread matched and connected with the internal thread in the first through hole is arranged at the first end of the first fastening rod, and the first circular rings are used for rotating the first fastening block;

a second through hole is formed in the second fastening piece, an internal thread is arranged in the second through hole, and an external thread which is connected with the internal thread in the second through hole in a matched mode is arranged at the second end of the first fastening rod.

Optionally, both ends of the first fastening rod are radially provided with first pin holes, the first fastening piece and the second fastening piece are arranged between the two first pin holes, and a first limiting pin is inserted into the first pin hole to prevent the first fastening piece and the second fastening piece from being separated from the first fastening rod.

Optionally, the movable contact piece is hinged to the hinge base by a second clamping mechanism, the second clamping mechanism comprising:

the outer side surfaces of the two movable contact pieces are provided with second elastic pieces;

and the second end of the second fastening rod is sequentially penetrated through the second elastic piece on one side, the movable contact piece on one side, the hinged plate, the movable contact piece on the other side and the second elastic piece on the other side to be connected with a fourth fastener.

Optionally, the third fastening piece includes a second fastening block and second rings disposed on two sides of the second fastening block, the second fastening block is provided with a third through hole, an internal thread is disposed in the third through hole, a first end of the second fastening rod is provided with an external thread connected with the internal thread in the third through hole in a matching manner, and the second rings are used for rotating the second fastening block;

and a fourth through hole is formed in the fourth fastening piece, an internal thread is arranged in the fourth through hole, and an external thread which is connected with the internal thread in the fourth through hole in a matching manner is arranged at the second end of the second fastening rod.

Optionally, both ends of the second fastening rod are radially provided with second pin holes, the third fastener and the fourth fastener are arranged between the two second pin holes, and the second limiting pin is inserted into the second pin holes to prevent the third fastener and the fourth fastener from being separated from the second fastening rod.

Optionally, the first buckle mechanism includes a first hook disposed on the fixing base, and the first hook can be clamped with the second buckle mechanism.

Optionally, the second snap mechanism comprises:

the fixed plate is arranged between the two movable contact pieces and is fixedly connected with the movable contact pieces;

the clamping plate is hinged with the fixed plate and is provided with a second hook which can be clamped with the first clamping mechanism;

and the first end of the third elastic part is connected with the fixed plate, the second end of the third elastic part is connected with the clamping plate, and the third elastic part enables the second hook to be clamped with the first clamping mechanism.

Optionally, the method further comprises:

the first insulating column is arranged on the disconnecting link base, and the fixed seat is arranged on the first insulating column;

the second insulating column is arranged on the disconnecting link base, and the hinge seat is arranged on the second insulating column.

Has the advantages that:

according to the disconnecting link fastening device provided by the invention, the movable contact piece rotates towards the static contact piece, so that the static contact piece is inserted between the two movable contact pieces, the two side surfaces of the static contact piece are respectively abutted against the inner side surfaces of the two movable contact pieces, and the first clamping mechanism is clamped with the second clamping mechanism, so that the static contact piece is effectively prevented from being separated from the movable contact piece; and the two movable contact pieces clamp the static contact piece through the first clamping mechanism, so that the static contact piece is effectively prevented from being contacted and loosened with the movable contact piece, and the stability, reliability and continuity of power supply of the power distribution network are further ensured.

Drawings

FIG. 1 is a front view of a knife switch fastening device according to one embodiment of the present invention;

fig. 2 is a schematic structural diagram of a first fastening mechanism and a second fastening mechanism provided in the first embodiment of the present invention;

FIG. 3 is a top view of a knife switch fastening device according to one embodiment of the present invention;

FIG. 4 is a schematic view of a first fastener structure provided in accordance with one embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a first stop cap according to a first embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a first clamping mechanism according to a second embodiment of the present invention;

fig. 7 is a schematic structural diagram of a first clamping mechanism according to a third embodiment of the present invention.

In the figure:

100. a disconnecting link base; 110. a fixed seat; 120. a hinged seat; 121. a hinge plate; 130. a first insulating pillar; 140. a second insulating column; 150. a first wiring board; 160. a second wiring board;

210. a static contact piece; 220. a first hook; 221. a first inclined surface;

310. a movable contact spring; 320. a second buckle mechanism; 321. a fixing plate; 3211. a first connection portion; 3212. a limiting part; 322. a clamping and connecting plate; 3221. a second hook; 3222. a second inclined surface; 3223. a second connecting portion; 3224. a hinge portion; 323. a third elastic member;

400. a first clamping mechanism; 410. a limiting sleeve; 420. a first elastic member; 430. a first fastening rod; 440. a first fastener; 441. a first fastening block; 442. a first circular ring; 450. a second fastener; 460. a first limit cap; 470. a first limit pin;

500. a second clamping mechanism; 510. a second elastic member; 520. a second fastening rod; 530. a third fastener; 540. a fourth fastener; 550. a second limit cap; 560. a second limit pin;

600. and a fourth elastic member.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

Example one

Referring to fig. 1, the present embodiment provides a disconnecting link fastening device, including a disconnecting link base 100, a fixed contact, a movable contact and a first clamping mechanism 400, a fixed seat 110 and a hinged seat 120 are disposed on the disconnecting link base 100, the fixed contact includes a fixed contact 210 and a first clamping mechanism, the fixed contact 210 and the first clamping mechanism are both disposed on the fixed seat 110, the movable contact includes a movable contact 310, the movable contact 310 is disposed in two and symmetrical arrangements, a first end of the movable contact 310 is hinged to the hinged seat 120, a second end of the movable contact 310 is disposed with a second clamping mechanism 320 capable of being clamped with the first clamping mechanism, when the first clamping mechanism is clamped with the second clamping mechanism 320, two side surfaces of the fixed contact 210 respectively abut against inner side surfaces of the two movable contacts 310, the first clamping mechanism 400 is disposed on the movable contact, and the first clamping mechanism 400 enables the two movable contacts 310 to clamp the fixed contact 210.

The movable contact piece 310 rotates towards the static contact piece 210, so that the static contact piece 210 is inserted between the two movable contact pieces 310, two side surfaces of the static contact piece 210 respectively abut against the inner side surfaces of the two movable contact pieces 310, and the first clamping mechanism is clamped with the second clamping mechanism 320, so that the static contact piece 210 is effectively prevented from being separated from the movable contact pieces 310; and the two movable contacts 310 are enabled to clamp the static contact 210 through the first clamping mechanism 400, so that the static contact and the movable contact are effectively prevented from being contacted and loosened, and the stability, reliability and continuity of power supply of a power distribution network are further ensured.

Further, the two movable contact pieces 310 are bent back toward one side of the stationary contact piece 210, so that the stationary contact piece 210 is conveniently inserted between the two movable contact pieces 310 when the movable contact pieces 310 rotate toward the stationary contact piece 210.

Further, this switch fastener still includes first insulating column 130 and second insulating column 140, and first insulating column 130 and second insulating column 140 all set up on switch base 100, and fixing base 110 sets up on first insulating column 130, and articulated seat 120 sets up on second insulating column 140. The switch base 100 is provided with a plurality of U-shaped holes at intervals along the length direction, which facilitates the adjustment of the distance between the first insulating column 130 and the second insulating column 140 during installation, and makes the switch fastening device suitable for various installation environments. Further, the fixed base 110 and the hinged base 120 are both made of metal materials, the first wiring board 150 is arranged on the fixed base 110, the second wiring board 160 is arranged on the hinged base 120, and the hinged base 120 is conducted with the fixed base 110 by clamping the static contact piece 210 through the two movable contact pieces 310, so that the first wiring board 150 is conducted with the second wiring board 160.

In this embodiment, referring to fig. 2, the first fastening mechanism includes a first hook 220 disposed on the fixing base 110, and the first hook 220 can be fastened to the second fastening mechanism 320. Further, the first hook 220 may be formed by bending a metal sheet, so that the processing and manufacturing are convenient, and the material of the first hook 220 may be, but is not limited to, an elastic metal material. Further, the first hook 220 may be connected to the fixing base 110 by welding, or may be connected to the fixing base 110 in other forms, which is not described in detail herein. Further, the first hook 220 may be integrally formed with the static contact 210, and may be formed by a numerical control machine or a wire cutting process, which is convenient to manufacture. Further, the static contact 210 may be connected to the fixing base 110 by welding, or may be connected to the fixing base 110 by other forms, which will not be described in detail herein.

In this embodiment, with continued reference to fig. 2, the second latch mechanism 320 includes a fixed plate 321, a latch plate 322 and a third elastic member 323, the fixed plate 321 is disposed between the two movable contacts 310 and is fixedly connected to the movable contacts 310, the latch plate 322 is hinged to the fixed plate 321, the latch plate 322 is provided with a second hook 3221 capable of being latched to the first latch mechanism, a first end of the third elastic member 323 is connected to the fixed plate 321, a second end of the third elastic member 323 is connected to the latch plate 322, and the third elastic member 323 enables the second hook 3221 to be latched to the first latch mechanism. Further, second hook 3221 can be engaged with first hook 220, first hook 220 is provided with a first inclined surface 221, and second hook 3221 is provided with a second inclined surface 3222. In this embodiment, when the movable contact 310 rotates towards the stationary contact 210, the second inclined surface 3222 of the second hook 3221 presses against the first inclined surface 221 of the first hook 220, so that the latch plate 322 rotates, the third elastic member 323 accumulates elastic force, when the second inclined surface 3222 is separated from the first inclined surface 221, the restoring force of the third elastic member 323 rotates the latch plate 322 in a reverse direction, the second hook 3221 is latched with the first hook 220, at this time, two side surfaces of the stationary contact 210 respectively abut against inner side surfaces of the two movable contacts 310, and the second hook 3221 is latched with the first hook 220 to effectively prevent the stationary contact 210 from separating from the movable contact 310.

Specifically, a first connecting portion 3211 is disposed on the fixing plate 321, a second connecting portion 3223 is disposed at a first end of the clamping plate 322, a first end of the third elastic element 323 is connected to the first connecting portion 3211, and a second end of the third elastic element 323 is connected to the second connecting portion 3223. Specifically, the third elastic element 323 may be a spring or another elastic body, which is not described in detail herein. Further, a second hook 3221 is disposed at a second end of the clamping plate 322, a hinge portion 3224 hinged to the fixing plate 321 is disposed between the second hook 3221 and the second connecting portion 3223 on the clamping plate 322, and a hinge manner between the clamping plate 322 and the fixing plate 321 is the prior art, and will not be described in detail herein.

Further, the fixing plate 321 is provided with a limiting portion 3212, when the second hook 3221 is not in contact with the first hook 220, the first end of the clamping plate 322 abuts against the limiting portion 3212 under the action of the third elastic member 323, so as to position the second hook 3221, and when the movable contact 310 rotates toward the stationary contact 210, the second inclined surface 3222 of the second hook 3221 can abut against the first inclined surface 221 of the first hook 220.

In this embodiment, referring to fig. 3, the first clamping mechanism 400 includes a position limiting sleeve 410, a first elastic member 420, a first fastening rod 430, a first fastening member 440 and a second fastening member 450, the position limiting sleeve 410 is disposed between the two movable contact pieces 310, the first elastic member 420 is disposed on the outer side surfaces of the two movable contact pieces 310, the first fastening rod 430 is connected to the first fastening member 440 at a first end, and a second end of the first fastening rod 430 sequentially penetrates through the first elastic member 420 on one side, the movable contact piece 310 on one side, the position limiting sleeve 410, the movable contact piece 310 on the other side and the first elastic member 420 on the other side to be connected to the second fastening member 450. Specifically, the movable contact 310 is provided with a first through hole in matching connection with the first fastening rod 430, and the first fastening rod 430 is inserted into the first through hole. In this embodiment, the spacing sleeve 410 maintains a proper distance between the two movable contacts 310, so that the stationary contact 210 is conveniently placed between the two movable contacts 310 when the movable contacts 310 are rotated toward the stationary contact 210, and the first and

second fastening members

440 and 450 press the two movable contacts 310 by the first elastic member 420, thereby allowing the two movable contacts 310 to clamp the stationary contact 210. In addition, even if the connection of the first fastening member 440 and the first fastening rod 430 or the connection of the second fastening member 450 and the first fastening rod 430 is loosened, the first fastening member 440 and the second fastening member 450 can cause the two movable contacts 310 to clamp the stationary contact 210 by the elastic force of the first elastic member 420. Further, the first elastic member 420 effectively prevents the first fastening member 440 and the first fastening rod 430 and the second fastening member 450 and the first fastening rod 430 from being loose, and the first elastic member 420 may be, but is not limited to, a spring, which will not be described in detail herein.

Further, referring to fig. 4, the first fastening member 440 includes a first fastening block 441 and first circular rings 442 disposed at two sides of the first fastening block 441, the first fastening block 441 is provided with a first through hole, an internal thread is disposed in the first through hole, a first end of the first fastening rod 430 is provided with an external thread matched with the internal thread in the first through hole, and the first circular rings 442 are used for rotating the first fastening block 441; a second through hole is formed in the second fastening member 450, an internal thread is formed in the second through hole, and an external thread connected with the internal thread in the second through hole in a matching manner is formed at the second end of the first fastening rod 430. In this embodiment, when the maintenance personnel observes that the first fastening member 440 and the second fastening member 450 are loosened on the first fastening rod 430, without power cut, the maintenance personnel can screw the first ring 442 to drive the first fastening block 441 to rotate by using an insulating tool or an insulating glove, so that the first fastening block 441 moves towards the movable contact piece 310, and the first fastening member 440 and the second fastening member 450 re-press the first elastic member 420 to enable the two movable contact pieces 310 to clamp the fixed contact piece 210.

Further, referring to fig. 5, two ends of the first elastic member 420 are provided with first limit caps 460, and two ends of the first elastic member 420 are disposed in the first limit caps 460. Specifically, a first limiting hole is formed in the center of the first limiting cap 460, the first fastening rod 430 is inserted into the first limiting hole, and the first fastening rod 430 limits the position of the first limiting cap 460 through the first limiting hole, so as to limit the circumferential position of the first elastic member 420 relative to the first fastening rod 430.

Further, as shown with continued reference to fig. 3, the second catch mechanism 320 is fixed between the two movable contact pieces 310 by the first clamping mechanism 400. Specifically, the first fastening rods 430 are provided with a plurality of mounting holes, which are in one-to-one corresponding and matching connection with the first fastening rods 430, are formed on the fixing plate 321, and the first fastening rods 430 are inserted into the mounting holes. Further, the fixed plate 321 abuts against the inner side surface of the movable contact 310 on one side and abuts against the end of the position limiting sleeve 410 on the other side. In this embodiment, the second latch mechanism 320 is fixed between the two movable contacts 310 by the first clamping mechanism 400, so that the number of parts of the disconnecting link fastening device is reduced, the structure of the disconnecting link fastening device is simpler, and the installation is convenient. Preferably, two first fastening rods 430 are provided, and two mounting holes are opened on the fixing plate 321.

Further, as shown in fig. 3, the first fastening rod 430 has first pin holes radially opened at both ends thereof, the first fastening member 440 and the second fastening member 450 are disposed between the first pin holes, and a first limit pin 470 is inserted into the first pin holes to prevent the first fastening member 440 and the second fastening member 450 from being separated from the first fastening rod 430. In this embodiment, the first and

second fastening pieces

440 and 450 are prevented from being separated from the first fastening rod 430 by the first stopper pin 470, and even in the case that the first and

second fastening pieces

440 and 450 are loosened, the first elastic member 420 can maintain a certain elastic force to press the movable contact piece 310, so that the inner side surfaces of the two movable contact pieces 310 can always press against the fixed contact piece 210, and the conduction between the first and

second wiring boards

150 and 160 is maintained.

In this embodiment, as shown in fig. 3, the movable contact 310 is hinged to the hinge base 120 through the second clamping mechanism 500, the second clamping mechanism 500 includes a second elastic member 510 and a second fastening rod 520, the second elastic member 510 is disposed on the outer side of each of the two movable contacts 310, the hinge base 120 is provided with a hinge plate 121, the two movable contacts 310 are disposed on two sides of the hinge plate 121, a first end of the second fastening rod 520 is connected to a third fastening member 530, and a second end of the second fastening rod 520 sequentially penetrates through the second elastic member 510 on one side, the movable contact 310 on one side, the hinge plate 121, the movable contact 310 on the other side, and the second elastic member 510 on the other side and is connected to a fourth fastening member 540. Specifically, the movable contact spring 310 is provided with a second through hole in matching connection with the second fastening rod 520, and the second fastening rod 520 is inserted into the second through hole. In this embodiment, when the static contact 210 is inserted between the two movable contacts 310, the two movable contacts 310 are flipped with respect to the hinge plate 121, the third and

fourth fastening members

530 and 540 press the two movable contacts 310 by the second elastic member 510, thereby pressing the two movable contacts 310 against the hinge plate 121 to prevent the movable contacts 310 from being virtual-connected with the hinge plate 121, and the second elastic member 510 effectively prevents the third fastening member 530 from being loosely connected with the second fastening rod 520 and the fourth fastening member 540 from being loosely connected with the second fastening rod 520.

Further, third fastener 530 includes second fastening block and sets up in the second ring of second fastening block both sides, the third through-hole has been seted up on the second fastening block, be provided with the internal thread in the third through-hole, second anchorage bar 520 first end is provided with the external screw thread with the internal thread accordant connection in the third through-hole, the second ring is used for rotating the second fastening block, the fourth through-hole has been seted up on fourth fastener 540, be provided with the internal thread in the fourth through-hole, second anchorage bar 520 second end is provided with the external screw thread with the internal thread accordant connection in the fourth through-hole. In this embodiment, when the maintenance personnel observes that the third fastening member 530 and the fourth fastening member 540 are loosened on the second fastening rod 520, the maintenance personnel can screw the second ring to drive the second fastening block to rotate by using an insulating tool or an insulating glove, so that the second fastening block moves toward the movable contact 310, and the third fastening member 530 and the fourth fastening member 540 are fastened on the second fastening rod 520 again.

Further, both ends of the second elastic member 510 are provided with a second limiting cap 550, and both ends of the second elastic member 510 are disposed in the second limiting cap 550. Specifically, a second limiting hole is formed in the center of the second limiting cap 550, the second fastening rod 520 is inserted into the second limiting hole, and the second fastening rod 520 limits the position of the second limiting cap 550 through the second limiting hole, so as to limit the circumferential position of the second elastic member 510 relative to the second fastening rod 520.

Further, both ends of the second fastening rod 520 are radially provided with second pin holes, the third fastening member 530 and the fourth fastening member 540 are disposed between the second pin holes, and a second limit pin 560 is inserted into the second pin holes to prevent the third fastening member 530 and the fourth fastening member 540 from being separated from the second fastening rod 520. In this embodiment, the third fastening member 530 and the fourth fastening member 540 are prevented from being separated from the second fastening rod 520 by the second stopper pin 560, and even if the third fastening member 530 and the fourth fastening member 540 are loosened, the second elastic member 510 maintains a certain elastic force to press the movable contact piece 310, so that the inner side surfaces of the two movable contact pieces 310 can always press against the hinge plate 121, and the conduction between the first wiring board 150 and the second wiring board 160 is maintained.

In this embodiment, the disconnecting link fastening device further includes a fourth elastic member 600, two ends of the fourth elastic member 600 are respectively connected to the inner side surfaces of the two movable contacts 310, and the fourth elastic member 600 is disposed between the first clamping mechanism 400 and the second clamping mechanism 500. In this embodiment, when the movable contact piece 310 rotates toward the stationary contact piece 210, the elastic force of the fourth elastic member 600 acts on the movable contact piece 310 to reduce the clamping force of the two movable contact pieces 310 with respect to the stationary contact piece 210, and more conveniently the stationary contact piece 210 is disposed between the two movable contact pieces 310, and further, the elastic force of the fourth elastic member 600 acts on the first fastening member 440 and the second fastening member 450 through the movable contact piece 310 and the first elastic member 420, increases the frictional force of the first fastening member 440 and the second fastening member 450 with respect to the first fastening rod 430, effectively prevents the first fastening member 440 and the second fastening member 450 from being loosely coupled with the first fastening rod 430, and the elastic force of the fourth elastic member 600 acts on the third fastening member 530 and the fourth fastening member 540 through the movable contact 310 and the first elastic member 510, increasing the frictional force of the third fastening member 530 and the fourth fastening member 540 with respect to the second fastening rod 520, effectively preventing the third fastening member 530 and the fourth fastening member 540 from being loosely coupled with the second fastening rod 520. Further, the fourth elastic member 600 may be, but is not limited to, a spring. Specifically, the movable contact spring 310 is provided with a third through hole, the limiting shaft penetrates through the third through hole and the fourth elastic piece, two end portions of the limiting shaft are clamped with spring retainer rings, and the spring retainer rings abut against the outer side face of the movable contact spring 310, so that the axial fixation of the limiting shaft is realized. Further, the fourth elastic member 600 is provided with at least one.

Example two

The first clamping mechanism 400 of the knife switch fastening device provided in this embodiment is different from the first clamping mechanism in the first embodiment, in this embodiment, as shown in fig. 6, the first fastening rod 430 and the first fastening member 440 are integrally formed, and an internal thread matching and connecting with an external thread at the second end of the first fastening rod 430 is disposed in the first through hole of the movable contact 310 away from the first fastening member 440. Specifically, the second end of the first fastening rod 430 is sequentially inserted through the first elastic member 420, the movable contact 310 close to the first fastening member 440, the stop collar 410, the fixed plate 321, and the movable contact 310 far from the first fastening member 440, and is in threaded connection with the movable contact 310 far from the first fastening member 440.

Further, a second end of the first fastening rod 430 is provided with a first pin hole, and a limit pin is inserted into the first pin hole to prevent the first fastening rod 430 from being separated from the first through hole of the movable contact 310 far away from the first fastening member 440.

Other structures of the knife switch fastening device provided in this embodiment are the same as those of the first embodiment, and are not described in detail herein.

EXAMPLE III

The first clamping mechanism 400 of the knife switch fastening device provided in this embodiment is different from the first and second embodiments, in this embodiment, as shown in fig. 7, the first fastening rod 430 may be a bolt, and a threaded end of the bolt sequentially penetrates through the first elastic member 420 on one side, the movable contact piece 310 on one side, the fixing plate 321, the stop collar 410, the movable contact piece 310 on the other side, and the first elastic member 420 on the other side to be screwed with the first fastening member 440.

Further, the threaded end of the bolt is provided with a first pin hole, and a limit pin is inserted into the first pin hole to prevent the first fastening member 440 from being separated from the first fastening rod 430.

Example four

The switch fastener that this embodiment provided replaces fourth elastic component 600 for the sleeve, is provided with the internal thread in the sleeve, and spacing axle is provided with the external screw thread with telescopic internal thread accordant connection, and third perforation and sleeve on the movable contact spring 310 are worn to locate by spacing axle, and spacing axle passes through the axial fixity that the spring collar realized spacing axle. Further, the length of the sleeve is less than or equal to the thickness of the hinge plate 121, and the sum of the length of the limiting sleeve 410 and the thickness of the fixing plate 321 is less than or equal to the length of the sleeve. In this embodiment, the distance and position between the two movable contacts 310 are defined by the sleeve and the spring collar, so that the installation of the second latch mechanism 320 and the connection of the movable contact 310 to the hinge plate 121 are facilitated when the second latch mechanism 320 or the movable contact 310 needs to be replaced.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A knife switch fastening device, comprising:

the disconnecting link base (100), wherein a fixed seat (110) and a hinged seat (120) are arranged on the disconnecting link base (100);

the static contact comprises a static contact piece (210) and a first buckling mechanism, and the static contact piece (210) and the first buckling mechanism are both arranged on the fixed seat (110);

the moving contact comprises two moving contact pieces (310), the two moving contact pieces (310) are symmetrically arranged, the first end of each moving contact piece (310) is hinged to the hinge base (120), the second end of each moving contact piece (310) is provided with a second buckle mechanism (320) which can be clamped with the first buckle mechanism, and when the first buckle mechanism is clamped with the second buckle mechanism (320), two side faces of the static contact piece (210) respectively abut against the inner side faces of the two moving contact pieces (310);

and the first clamping mechanism (400) is arranged on the movable contact, and the first clamping mechanism (400) can enable the two movable contact pieces (310) to clamp the static contact piece (210).

2. The knife-switch fastening device according to claim 1, characterized in that the first clamping mechanism (400) comprises:

the limiting sleeve (410) is arranged between the two movable contact pieces (310);

the first elastic piece (420) is arranged on the outer side surface of each of the two movable contact pieces (310);

the first fastening rod (430), the first end of the first fastening rod (430) is connected with a first fastening piece (440), and the second end of the first fastening rod (430) is sequentially arranged on the first elastic piece (420) on one side, the movable contact (310) on one side, the limiting sleeve (410), the movable contact (310) on the other side and the first elastic piece (420) on the other side in a penetrating manner and is connected with a second fastening piece (450).

3. The disconnecting link fastening device according to claim 2, wherein the first fastening member (440) comprises a first fastening block (441) and first circular rings (442) disposed at two sides of the first fastening block (441), a first through hole is formed in the first fastening block (441), an internal thread is disposed in the first through hole, an external thread matched with the internal thread in the first through hole is disposed at a first end of the first fastening rod (430), and the first circular rings (442) are used for rotating the first fastening block (441);

and a second through hole is formed in the second fastening piece (450), an internal thread is arranged in the second through hole, and an external thread which is matched and connected with the internal thread in the second through hole is arranged at the second end of the first fastening rod (430).

4. The disconnecting link fastening device according to claim 2, wherein the first fastening rod (430) has first pin holes radially opened at both ends thereof, the first fastening member (440) and the second fastening member (450) are disposed between the first pin holes, and a first stopper pin (470) is inserted into the first pin holes to prevent the first fastening member (440) and the second fastening member (450) from being separated from the first fastening rod (430).

5. The disconnecting switch fastening device according to claim 1, wherein the movable contact (310) is hinged to the hinge base (120) by a second clamping mechanism (500), the second clamping mechanism (500) comprising:

the second elastic piece (510) is arranged on the outer side surface of each of the two movable contact pieces (310);

the hinge base (120) is provided with a hinge plate (121), the two movable contact pieces (310) are arranged on two sides of the hinge plate (121), a first end of the second fastening rod (520) is connected with a third fastening piece (530), and a second end of the second fastening rod (520) is sequentially arranged on the second elastic piece (510) on one side, the movable contact piece (310) on one side, the hinge plate (121), the movable contact piece (310) on the other side and the second elastic piece (510) on the other side in a penetrating manner and is connected with a fourth fastening piece (540).

6. The disconnecting link fastening device according to claim 5, wherein the third fastening member (530) comprises a second fastening block and second circular rings disposed at two sides of the second fastening block, the second fastening block is provided with a third through hole, an internal thread is disposed in the third through hole, a first end of the second fastening rod (520) is provided with an external thread matching with the internal thread in the third through hole, and the second circular rings are used for rotating the second fastening block;

a fourth through hole is formed in the fourth fastening piece (540), internal threads are arranged in the fourth through hole, and external threads matched and connected with the internal threads in the fourth through hole are arranged at the second end of the second fastening rod (520).

7. The disconnecting link fastening device according to claim 5, wherein both ends of the second fastening rod (520) are radially provided with second pin holes, the third fastening member (530) and the fourth fastening member (540) are disposed between the second pin holes, and a second limit pin (560) is inserted into the second pin holes to prevent the third fastening member (530) and the fourth fastening member (540) from being separated from the second fastening rod (520).

8. The disconnecting link fastening device according to claim 1, wherein the first snap mechanism comprises a first hook (220) disposed on the fixed base (110), and the first hook (220) can be snapped with the second snap mechanism (320).

9. The knife-switch fastening device according to claim 1, characterized in that the second snap-on mechanism (320) comprises:

the fixed plate (321) is arranged between the two movable contact pieces (310), and the fixed plate (321) is fixedly connected with the movable contact pieces (310);

the clamping and connecting plate (322) is hinged to the fixing plate (321), and the clamping and connecting plate (322) is provided with a second hook (3221) which can be clamped with the first clamping and connecting mechanism;

third elastic component (323), third elastic component (323) first end with fixed plate (321) are connected, third elastic component (323) second end with joint board (322) are connected, third elastic component (323) enable second couple (3221) with first buckle mechanism joint.

10. The knife-switch fastening device according to any one of claims 1-9, further comprising:

the first insulating column (130) is arranged on the disconnecting link base (100), and the fixed seat (110) is arranged on the first insulating column (130);

the second insulating column (140) is arranged on the disconnecting link base (100), and the hinge seat (120) is arranged on the second insulating column (140).