阅读说明：本技术 一种双电源开关的灭弧装置 (Arc control device of dual-power switch ) 是由 南乐余 于 2020-07-22 设计创作，主要内容包括：本发明公开了一种双电源开关的灭弧装置,通过在动触头与第二静触头和第三静触头之间的接合路径上分别转动设置灭弧隔板结构,切断动、静触头分离产生电弧以及引起的拉弧,且在动触头经过灭弧片组件时将电弧快速熄灭,从而防止动触头在第二静触头或第三静触头之间转动切换时因电弧窜接第二静触头或第三静触头而引起短接事故,采用本技术方案,利用灭弧隔板结构对动触头与第二静触头或第三静触头分断时产生的电弧进行阻隔和切断,防止发生窜弧及拉弧现象,减少电弧对动、静触头造成灼烧伤害,降低双电源开关内部温升,大幅提升灭弧装置的灭弧能力和灭弧效率,从而提高双电源开关的分断能力和使用寿命。(The invention discloses an arc extinguishing device of a dual-power switch, which is characterized in that arc extinguishing clapboard structures are respectively and rotatably arranged on a joint path between a moving contact and a second static contact and a third static contact, the moving contact and the static contacts are separated to generate electric arcs and cause arc discharge, and the electric arcs are quickly extinguished when the moving contact passes through the arc extinguishing piece assembly, so that short circuit accidents caused by the fact that the electric arcs are connected with the second static contact or the third static contact when the moving contact is in rotation switching between the second static contact or the third static contact are prevented, by adopting the technical scheme, the electric arcs generated when the moving contact and the second static contact or the third static contact are separated and cut off by using the arc extinguishing clapboard structures, arc discharge and arc discharge phenomena are prevented, burning injuries of the electric arcs to the moving contact and the static contacts are reduced, the temperature rise in the dual-power switch is reduced, and the arc, thereby improving the breaking capacity and the service life of the dual-power switch.)

1. The utility model provides a dual supply switch's arc control device, include casing (1) and rotate set up in moving contact (2) in casing (1), and encircle moving contact (2) set up first static contact (3), second static contact (4), third static contact (5) in casing (1), moving contact (2) atress when rotating can with first static contact (3) with second static contact (4) joint or with first static contact (3) with third static contact (5) joint, its characterized in that still includes:

the arc extinguishing piece assembly (6) is arranged between the first fixed contact (3) and the second fixed contact (4) and between the first fixed contact (3) and the third fixed contact (5) around the moving contact (2), and the moving contact (2) penetrates through the arc extinguishing piece assembly (6) in a rotating mode;

the arc extinguishing partition plate structure (7) is rotatably arranged on a joint path between the movable contact (2) and the second static contact (4) and the third static contact (5) respectively, and the arc extinguishing partition plate structure (7) is forwardly rotated and shielded on the joint path when the movable contact (2) is separated from the second static contact (4) or the third static contact (5) and is pushed by the movable contact (2) to reversely rotate so as to release shielding of the joint path when the movable contact (2) is connected with the second static contact (4) or the third static contact (5).

2. The arc extinguishing device of the dual-power switch according to claim 1, wherein the arc extinguishing partition structure (7) is provided with two groups corresponding to the second fixed contact (4) and the third fixed contact (5), one group of the arc extinguishing partition structure (7) is provided in a first gap (11) formed between the arc extinguishing piece assembly (6) and the second fixed contact (4), and the other group of the arc extinguishing partition structure (7) is provided in a second gap (12) formed between the arc extinguishing piece assembly (6) and the third fixed contact (5).

3. The arc extinguishing device of the dual power switch according to claim 2, wherein each set of the arc-extinguishing partition structure (7) comprises an arc-extinguishing baffle (71) rotatably disposed in the housing (1), and an elastic member (72) disposed between the arc-extinguishing baffle (71) and the housing (1), the elastic member (72) applying a biasing force to the arc-extinguishing baffle (71) to rotate near one side of the engagement path.

4. The arc extinguishing device of the dual-power switch according to claim 3, wherein the housing (1) is provided with a limit block (13) located on a rotation path of the arc extinguishing baffle (71), and the arc extinguishing baffle (71) is matched and abutted against the limit block (13) under the action of an elastic piece (72).

5. The arc extinguishing device of the dual-power switch according to claim 4, wherein the arc extinguishing baffle (71) comprises a rotating shaft part (73) and a baffle body connected with the rotating shaft part (73), the elastic part (72) is a torsion spring sleeved on the rotating shaft part (73), one end of the elastic part abuts against the baffle body, and the other end of the elastic part is located in a limiting groove (14) formed in the shell (1).

6. The arc extinguishing device of the dual-power switch according to claim 5, wherein the baffle body comprises a driving panel (74) pushed by the moving contact (2) and a supporting frame (75) connected to the back of the driving panel (74), the supporting frame (75) is integrally connected with the side wall of the rotating shaft portion (73), and one end of the elastic member (72) is matched and abutted against the supporting frame (75).

7. The arc extinguishing device of the dual-power switch as claimed in claim 6, wherein the driving panel (74) is an S-shaped cambered structure, and the cambered structure comprises an arc concave surface (76) which is matched and abutted against the limiting block (13) and an arc convex surface (77) which is abutted and pushed by the movable contact (2).

8. The arc extinguishing device of the dual-power switch according to any one of claims 1-7, wherein a first transition contact (31) in fit contact with the movable contact (2) extends outwards from each side of the first fixed contact (3), and a second transition contact (41) and a third transition contact (51) extend outwards from each side of the second fixed contact (4) and the third fixed contact (5) which are connected with the movable contact (2).

9. The arc extinguishing device of the dual-power switch according to claim 8, wherein the arc-extinguishing piece assembly (6) comprises a plurality of arc-extinguishing grids (61) in a U-shaped structure, and the first transition contact (31) is arranged at an opening (62) of the arc-extinguishing grids (61).

10. The arc extinguishing device of the dual-power switch according to claim 9, wherein the moving contact (2) is eccentrically arranged on the insulating rotating shaft (21), and two ends of the moving contact (2) are bent ends (22) formed by bending.

Technical Field

The invention relates to the technical field of low-voltage appliances, in particular to an arc extinguishing device of a dual-power switch.

Background

When the contact structure opens a circuit in the atmosphere, as long as the voltage exceeds 12-20V, the cut-off current exceeds 0.25-1A, an electric arc is usually generated in a contact gap (also called an arc gap) to keep the current on, the contact is not cut off until the arc extinguishes the contact gap to become insulating medium current, the contact is burnt by the high temperature of the electric arc, and copper ions are left on the surface of the contact after the electric arc is extinguished.

Chinese patent document CN203070945U discloses a contact device of a dual power switch, which includes a moving contact and a static contact, the static contact includes two contact pieces, the moving contact includes two moving contact pieces, the two moving contact pieces form a V shape, the moving contact is fixed on an insulating rotating shaft controlled by a transmission mechanism, the static contact includes a static contact a for a main power inlet wire, a static contact b for a standby power inlet wire and a static contact c for an outlet wire, the static contacts a and b are fixed on an insulating base, the static contact c is fixed on the inner side of an insulating cover plate of the dual power switch, but when the contact device switches the main power and the standby power, an arc will be generated when the two ends of the moving contact and the static contact are disconnected, during the fast switching process, an arc-out phenomenon will be generated, and when the two ends of the moving contact switch simultaneously generate an arc to cause a short-circuit fault of the main power and, the existing arc extinguishing chamber only absorbs arc extinguishing but is not enough to extinguish arc, so that moving and static contacts can be burnt and damaged, the internal temperature rise of the dual-power switch is improved, the arc extinguishing capability is poor, and the use performance and the service life of the dual-power switch are influenced.

Disclosure of Invention

Therefore, the technical problem to be solved by the invention is to overcome the problems that when a main power supply and a standby power supply are switched by a dual-power switch in the prior art, short circuit fault occurs to the main power supply and the standby power supply due to the fact that arcs are generated at two ends of a moving contact simultaneously, the arc extinguishing capability is poor, and the generated arcs and arc discharge can cause burning damage to moving contacts and static contacts, so that the service performance and the service life of a product are influenced.

The invention provides an arc extinguishing device of a dual-power switch, which comprises a shell, a moving contact rotationally arranged in the shell, a first fixed contact, a second fixed contact and a third fixed contact which are arranged in the shell around the moving contact, wherein the moving contact can be jointed with the first fixed contact and the second fixed contact or jointed with the first fixed contact and the third fixed contact when stressed to rotate, and the arc extinguishing device also comprises:

the arc extinguishing piece assemblies are arranged between the first fixed contact and the second fixed contact and between the first fixed contact and the third fixed contact respectively around the moving contact, and the moving contact penetrates through the arc extinguishing piece assemblies in a rotating mode;

and the arc extinguishing partition plate structure is rotatably arranged on a joint path between the moving contact and the second fixed contact or the third fixed contact respectively, positively rotates and is shielded on the joint path when the moving contact is separated from the second fixed contact or the third fixed contact, and is pushed by the moving contact to reversely rotate when the moving contact is connected with the second fixed contact or the third fixed contact so as to relieve the shielding of the joint path.

In the arc extinguishing device of the dual-power switch, the arc extinguishing partition plate structures are provided with two groups corresponding to the second static contact and the third static contact, a group of arc extinguishing partition plate structures is arranged in a first gap formed between the arc extinguishing piece assembly and the second static contact, and another group of arc extinguishing partition plate structures is arranged in a second gap formed between the arc extinguishing piece assembly and the third static contact.

In the arc extinguishing device of the dual power switch, each group of the arc extinguishing partition plate structure comprises an arc extinguishing baffle plate which is rotatably arranged in the shell, and an elastic piece which is arranged between the arc extinguishing baffle plate and the shell, wherein the elastic piece applies a biasing force which is close to one side of the joint path and rotates to the arc extinguishing baffle plate.

In the arc extinguishing device with the dual power switches, the shell is provided with a limiting block located on the rotating path of the arc extinguishing baffle, and the arc extinguishing baffle is matched and abutted against the limiting block under the action of the elastic piece.

In foretell dual-power switch's arc control device, the arc extinguishing baffle include pivot portion and with the baffle body that pivot portion links to each other, the elastic component is established for the cover the epaxial torsional spring of pivot portion, its one end butt is in on the baffle body, its other end is located in the fashioned spacing groove of casing.

In the arc extinguishing device with the dual-power switch, the baffle body comprises a driving panel and a support frame, the driving panel is pushed by the moving contact, the support frame is connected to the back of the driving panel, the support frame is integrally connected with the side wall of the rotating shaft portion, and one end of the elastic piece is matched and abutted against the support frame.

In the arc extinguishing device of the dual-power switch, the driving panel is of an S-shaped arc-shaped structure, and the arc-shaped structure comprises an arc-shaped concave surface matched and abutted with the limiting block and an arc-shaped convex surface abutted and pushed by the moving contact.

In the arc extinguishing device of the dual-power switch, two sides of the first fixed contact respectively extend outwards to form a first transition contact which is in matched contact with the movable contact, and the second fixed contact and the third fixed contact respectively extend outwards to form a second transition contact and a third transition contact on one side connected with the movable contact.

In foretell dual supply switch's arc control device, the arc extinguishing piece subassembly includes to be formed by a plurality of arc extinguishing bars pieces that are U type structure, first transition contact setting is in the opening part of arc extinguishing bars piece.

In the arc extinguishing device of the dual-power switch, the moving contact is eccentrically arranged on the insulating rotating shaft, and two ends of the moving contact are bending ends formed in a bending mode.

Compared with the prior art, the technical scheme of the invention has the following advantages:

1. the arc extinguishing device of the dual-power switch is disconnected with the third static contact when the movable contact is rotationally connected with the first static contact and the second static contact, and is disconnected with the second static contact when the movable contact is rotationally connected with the first static contact and the third static contact, so that the switching of a main power supply and a standby power supply is realized, arc extinguishing clapboard structures are respectively and rotationally arranged on the joint paths between the movable contact and the second static contact and the third static contact, the arc extinguishing clapboard structures are rotationally shielded on the joint paths between the movable contact and the second static contact or the third static contact when the movable contact is separated from the second static contact or the third static contact, so that electric arcs generated by the separation of the movable contact and the static contact and arc drawing caused by the separation of the movable contact and the third static contact can be cut off, and the electric arcs are rapidly extinguished when the movable contact passes through the arc extinguishing sheet component, so that short circuit accidents caused by the electric arcs, meanwhile, when the moving contact is connected with the third static contact or the second static contact, the moving contact pushes away an arc-extinguishing partition plate structure sheltered on a connection path, and the switching-on motion of the moving contact is not influenced.

2. According to the arc extinguishing device of the dual-power switch, when the moving contact rotates and is connected with the second fixed contact or the third fixed contact, the arc extinguishing baffle is pushed to extrude the elastic piece to enable the elastic piece to generate a deformation effect, when the moving contact is separated from the second fixed contact or the third fixed contact, the elastic piece elastically resets and applies a biasing force which rotates close to one side of the connection path to the arc extinguishing baffle, so that the arc extinguishing baffle rapidly rotates and is shielded between the moving contact and the second fixed contact or the third fixed contact, the rotating reaction speed is high, the automatic resetting function of the arc extinguishing baffle is achieved, and the effects of cutting off electric arcs and protecting contacts are achieved.

3. The arc extinguishing device of the dual-power switch provided by the invention has the advantages that the baffle body comprises the driving panel pushed by the moving contact and the supporting frame connected to the back surface of the driving panel, the supporting frame is used for connecting the driving panel and the rotating shaft, the supporting frame is integrally formed on the two triangular plates on the back surface of the driving panel, the impact force applied to the driving panel is effectively shared, the overall strength of the baffle body is increased, the driving panel is not easy to deform when in collision contact with the moving contact, and the service life of a product is prolonged.

4. The arc extinguishing device of the dual-power switch provided by the invention has the advantages that the arc-shaped structure comprises the arc-shaped concave surface which is matched and abutted with the limiting block and the arc-shaped convex surface which is abutted and pushed by the moving contact, and the limiting block and the moving contact are respectively contacted with different parts of the baffle body by utilizing the arc-shaped concave surface and the arc-shaped convex surface which are matched and abutted with the limiting block and the moving contact respectively, so that the limiting block and the moving contact are not interfered with each other in the use process.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a front view of an arc extinguishing device of a dual power switch provided by the present invention;

fig. 2 is a schematic structural diagram of an arc extinguishing device of a dual power switch provided by the invention;

fig. 3 is a schematic structural diagram of an arc extinguishing device of a dual power switch in another direction according to the present invention;

FIG. 4 is a partially enlarged view of the portion A shown in FIG. 2;

description of reference numerals:

1-a shell; 11-a first gap; 12-a second gap; 13-a limiting block; 14-a limiting groove;

2-moving contact; 21-an insulated rotating shaft; 22-bent end;

3-a first stationary contact; 31-a first transition contact;

4-a second stationary contact; 41-a second transition contact;

5-a third static contact; 51-a third transition contact;

6-arc chute assembly; 61-arc extinguishing grid sheet; 62-opening;

7-arc extinguishing partition structure; 71-an arc chute; 72-a resilient member; 73-a spindle part; 74-a drive panel; 75-a support frame; 76-arc concave surface; 77-arc convex surface.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being 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," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.