CN214203477U

CN214203477U - Contact system with power-assisted opening

Info

Publication number: CN214203477U
Application number: CN202120309476.9U
Authority: CN
Inventors: 张韶松; 褚赛成; 何云成
Original assignee: Siqi Technology Co ltd
Current assignee: Siqi Technology Co ltd
Priority date: 2021-02-03
Filing date: 2021-02-03
Publication date: 2021-09-14
Anticipated expiration: 2031-02-03

Abstract

The utility model relates to a take contact system of helping hand separating brake, including moving contact and two static contacts, the both sides of moving contact outwards extend and form two moving contacts inboard towards, and two static contacts are two moving contacts setting relatively respectively, and moving contact center connection is epaxial rotation, the rear side center of moving contact is connected with the extension spring. The moving contact realizes switching on with the static contact through rotating, and the center of the rear side of the moving contact is provided with a tension spring which can enable the moving contact to automatically return to a switching-off position with the shortest tension spring, so that the contact system realizes automatic switching-off.

Description

Contact system with power-assisted opening

Technical Field

The utility model relates to a dual supply automatic transfer switch's contact system, especially a take contact system of helping hand separating brake.

Background

Many industries and departments have very high requirements on the reliability of power supply, and in order to ensure the continuity of power supply, a dual-power automatic transfer switch is adopted in many important occasions to supply power to an electric appliance. The main function of the device is that when the normal power supply fails, the device can be automatically switched to the standby power supply to continue to supply power to the load, and can be automatically switched back after the power supply is recovered to be normal, so that the requirement of a low-voltage power supply system on power supply switching is met.

The contact system of the dual-power automatic transfer switch capable of realizing simultaneous disconnection of a common power supply and a standby power supply generally adopts two static contacts to clamp a moving contact in the middle to realize contact, opposite pressure is applied to the two static contacts to compress the moving contact, and the moving contact is controlled by a rotating shaft to be in contact with different static contacts to realize connection of different power supplies. The contact system with the structure can not realize the reset of the middle position in the contact system, and has complex structure and high production cost.

Disclosure of Invention

In view of the above, the utility model provides a simple structure and can reply the contact system of taking helping hand separating brake of separating brake position automatically.

In order to realize above mesh, the utility model discloses a take contact system of helping hand separating brake, including moving contact and two static contacts, the both sides of moving contact outwards extend and form two moving contacts inboard towards, two static contacts are two relative moving contact settings respectively, and moving contact center connection is epaxial rotation, the rear side center of moving contact is connected with the extension spring.

The beneficial effects of the utility model are that the moving contact realizes closing a floodgate with the static contact through rotating, sets up the extension spring at moving contact rear side center and can make the moving contact automatic reply to the shortest separating brake position of extension spring, makes contact system realize automatic separating brake.

The utility model discloses further set up to the moving contact and include movable contact spring, insulating seat, abnormal shape torsional spring, insulating seat center formation centre bore, the movable contact spring sets up in insulating seat, and the movable contact spring stretches out the shaping from insulating seat by the bilateral symmetry of movable contact spring, and abnormal shape torsional spring is connected between movable contact spring and insulating seat, abnormal shape torsional spring includes middle-end connecting portion, connects two torsional spring portions at middle-end connecting portion both ends, connects respectively at the terminal connecting portion of two torsional spring portion outer ends, has seted up the torsional spring middle-end groove on the movable contact spring, forms two torsional spring end holes on the insulating seat inner wall, and the middle-end connecting portion setting of abnormal shape torsional spring is at the torsional spring middle-end inslot of movable contact spring, and two terminal connecting portions of abnormal shape torsional spring peg graft respectively in two torsional spring end holes of insulating seat, and two torsional spring portions of abnormal shape torsional spring provide opposite direction's power and order about middle-end connecting portion and be in the intermediate position.

The utility model enables the movable contact piece to approach to the middle position through the matching of the middle end connecting part of a special-shaped torsion spring and the middle end groove of the torsion spring, when the movable contact on one side is closed towards the static contact, the movable contact piece is pushed backwards by the static contact, and the special-shaped torsion spring provides pressure to enable the movable contact piece to be tightly pressed on the static contact, thereby ensuring the tight connection between the movable contact and the static contact; when the moving contact on the other side is closed towards the static contact, the special-shaped torsion spring can also provide pressure for the side. The special-shaped torsion spring is simple in structure, the special-shaped torsion spring provides bidirectional pressure for the movable contact piece through connection with the movable contact piece and the insulating seat, the number of assembling parts is small, the overall structure is simple, and the performance is reliable.

The utility model discloses further set up to two torsional spring portions of abnormal shape torsional spring are started by middle-end connecting portion and are formed to opposite direction coiling respectively. The above-mentioned solution ensures that the middle end connection portion approaches the middle position.

The utility model discloses further set up to form the contact groove on the insulating seat, the movable contact spring sets up at the contact inslot, and the contact inslot is provided with two rivets, corresponds the rivet on the movable contact spring and forms curved rivet groove, realizes through the cooperation of rivet groove and rivet that the movable contact spring rotates round insulating seat center. According to the scheme, the rivet groove sleeves move on the rivets to provide a limiting space and a moving space for the movable contact pieces, so that the movable contact pieces can relatively rotate around the insulating base.

The utility model discloses further set up to form in the insulator foot and use the centre bore to be the torsional spring groove at center, the torsional spring portion setting of abnormal shape torsional spring is at the torsional spring inslot. The torsion spring groove provides installation space for the torsion spring.

The utility model discloses further set up as the insulator foot includes insulator foot and insulating upper cover combination and forms, forms splice groove and concatenation piece on the insulator foot, covers on the insulating correspondence and forms concatenation piece and splice groove, and insulator foot and insulating upper cover realize the location concatenation through the cooperation between concatenation piece and the splice groove. The insulating base and the insulating upper cover have the same structure, so that the mold cost is saved, the insulating base and the insulating upper cover are convenient to splice, and the connection is reliable.

The utility model discloses further set up to contact system still includes casing and arc extinguishing bars piece, and moving contact and static contact setting are in the casing, and the arc extinguishing bars piece sets up on the casing outside moving contact and static contact, and the outer end of extension spring is connected on the casing at moving contact rear. The arc extinguishing grid pieces play an arc extinguishing role in breaking.

Drawings

FIG. 1 is an internal schematic view of an embodiment of the present invention

Fig. 2 is an exploded view of the moving contact according to the embodiment of the present invention.

Fig. 3 is a schematic view of the moving contact of the embodiment of the present invention with the insulating base removed.

Fig. 4 is a schematic view of the deformed torsion spring of the moving contact according to the embodiment of the present invention.

Fig. 5 is a schematic view of an insulating base of a moving contact according to an embodiment of the present invention.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

As shown in fig. 1-5, an embodiment of the present invention is a contact system with a power-assisted opening, which includes a housing 5, a movable contact 01 disposed in the housing 5, two stationary contacts 02, and a plurality of arc-extinguishing bars 6,

the movable contact comprises a movable contact piece 1, an insulating seat 2 and a special-shaped torsion spring 3, a middle shaft hole 26 is formed in the center of the insulating seat 2, the movable contact 01 is connected with a shaft to rotate through the middle shaft hole 26, the insulating seat 2 comprises an insulating base 21 and an insulating upper cover 22 which are combined, a section of contact piece groove 23 is correspondingly formed on the binding surface of the insulating base 21 and the insulating upper cover 22, the movable contact piece 1 is arranged in the contact piece groove 23, two sides of the movable contact piece 1 symmetrically extend out of the contact piece groove 23 of the insulating seat 2 to form a movable contact 11, two rivets 4 are symmetrically arranged in the contact piece groove 23, an arc-shaped rivet groove 12 is formed on the movable contact piece 1 corresponding to the rivets 4, the movable contact piece 1 rotates around the center of the insulating seat 2 through the matching of the rivet groove 12 and the rivets 4, a splicing groove 24 and a splicing block 25 are formed on the insulating base 21, a splicing block and a splicing groove are correspondingly formed on the insulating upper cover 22, the insulating base 21 and the insulating upper cover 22 are matched with the splicing groove 24 to realize positioning splicing, the insulating base 21 and the insulating upper cover 22 have the same structure, so that the mold cost can be saved, the special-shaped torsion spring 3 is connected between the movable contact spring 1 and the insulating base 2, the special-shaped torsion spring 3 comprises a middle end connecting part 31, two torsion spring parts 32 connected with two ends of the middle end connecting part 31, and end connecting parts 33 respectively connected with the outer ends of the two torsion spring parts 32, a torsion spring middle end groove 13 is arranged on a central axis of the inner side of the movable contact spring 1, a torsion spring groove 27 taking the middle shaft hole 26 as the center is formed in the insulating base 21 and the insulating upper cover 22 of the insulating base 2, the torsion spring part 32 of the special-shaped torsion spring 3 is arranged in the torsion spring groove 27, two torsion spring end holes 28 are formed on the inner walls of the torsion spring grooves 27 of the insulating base 21 and the insulating upper cover 22, the middle end connecting part 31 of the special-shaped torsion spring 3 is arranged in the torsion spring middle end groove 13 of the movable contact spring 1, the two end connecting parts 33 of the special-shaped torsion spring 3 are respectively inserted in the two torsion spring end holes 28, the two torsion spring parts 32 of the special-shaped torsion spring 3 are formed by winding the middle end connecting part 31 in opposite directions, and the two torsion spring parts 32 of the special-shaped torsion spring 3 provide forces in opposite directions to drive the middle end connecting part 31 to be in the middle position, so that pressure for keeping the middle position is applied to the movable contact piece 1. The two static contacts 02 are respectively arranged opposite to the two movable contacts 11, the center of the rear side of the movable contact 01 is connected with a tension spring 7, the outer end of the tension spring 7 is connected on the shell 5, and the arc-extinguishing grid piece 6 is arranged in the shell 5 outside the movable contacts 11 and the static contacts 02.

The above embodiments are the preferred embodiments of the present invention, but the scope of the present invention is not limited to the above embodiments, and other embodiments according to the spirit of the claims are within the scope of the present invention.

Claims

1. The utility model provides a take contact system of helping hand separating brake, includes moving contact and two static contacts, and the both sides of moving contact outwards extend and form two moving contacts inboard towards, and two static contacts set up two moving contacts relatively respectively, and moving contact center connection is epaxial rotation, its characterized in that: and the center of the rear side of the moving contact is connected with a tension spring.

2. Contact system with assisted opening according to claim 1, characterized in that: the moving contact includes the movable contact spring, the insulating seat, abnormal shape torsional spring, insulating seat center forms the centre bore, the movable contact spring sets up in the insulating seat, the movable contact stretches out the shaping from the insulating seat by the bilateral symmetry of movable contact spring, abnormal shape torsional spring connects between movable contact spring and insulating seat, abnormal shape torsional spring includes middle-end connecting portion, connect two torsional spring portions at middle-end connecting portion both ends, connect the terminal connecting portion in two torsional spring portion outer ends respectively, the torsional spring middle-end groove has been seted up on the movable contact spring, form two torsional spring end holes on the insulating seat inner wall, the middle-end connecting portion of abnormal shape torsional spring sets up in the torsional spring middle-end inslot of movable contact spring, two terminal connecting portion of abnormal shape torsional spring are pegged graft respectively in two torsional spring end holes of insulating seat, two torsional spring portions of abnormal shape torsional spring provide opposite direction's power and order to decide about middle-end connecting portion and be in the intermediate position.

3. Contact system with assisted opening according to claim 2, characterized in that: the two torsion spring parts of the special-shaped torsion spring are formed by respectively winding the middle end connecting parts in opposite directions.

4. Contact system with assisted opening according to claim 2 or 3, characterized in that: a contact piece groove is formed in the insulating seat, the movable contact piece is arranged in the contact piece groove, two rivets are arranged in the contact piece groove, the movable contact piece is provided with an arc-shaped rivet groove corresponding to the rivets, and the movable contact piece rotates around the center of the insulating seat through the matching of the rivet groove and the rivets.

5. Contact system with assisted opening according to claim 2 or 3, characterized in that: a torsion spring groove taking the center shaft hole as the center is formed in the insulating seat, and a torsion spring part of the special-shaped torsion spring is arranged in the torsion spring groove.

6. Contact system with assisted opening according to claim 2 or 3, characterized in that: the insulating base comprises an insulating base and an insulating upper cover which are combined to form a splicing groove and a splicing block, the insulating upper cover correspondingly forms the splicing block and the splicing groove, and the insulating base and the insulating upper cover are matched to realize positioning splicing through the splicing block and the splicing groove.

7. Contact system with assisted opening according to claim 1, 2 or 3, characterized in that: the contact system further comprises a shell and an arc-extinguishing grating sheet, the moving contact and the fixed contact are arranged in the shell, the arc-extinguishing grating sheet is arranged on the shell outside the moving contact and the fixed contact, and the outer end of the tension spring is connected to the shell behind the moving contact.