CN217426594U

CN217426594U - Safe and stable contactor

Info

Publication number: CN217426594U
Application number: CN202221349313.4U
Authority: CN
Inventors: 杨小明; 薛列三; 郑春雷
Original assignee: Zhejiang Ruixin Electromechanical Co ltd
Current assignee: Zhejiang Ruixin Electromechanical Co ltd
Priority date: 2022-05-26
Filing date: 2022-05-26
Publication date: 2022-09-13
Anticipated expiration: 2032-05-26

Abstract

The utility model provides a safe and stable contactor, which belongs to the technical field of contactors and comprises a shell, a static contact fixed in the shell and a moving contact capable of contacting or separately matching with the moving contact, wherein an arc extinguishing cover is arranged at one side of the matching part of the static contact and the moving contact, the static contact is connected with an arc striking sheet, one end of the arc striking sheet extends to the arc extinguishing cover, a mounting groove for inserting the arc extinguishing cover is arranged on the shell, and extension grooves are arranged at the edges of two sides of the mounting groove; the utility model discloses directly be connected the static contact with the striking plate, can promote the striking speed, and then promoted arc extinguishing efficiency, strengthened the breaking capacity of product, firmly fix a plurality of arc extinguishing bars piece through the cover body simultaneously and constitute the arc extinguishing cover of integral type, the assembly is quick and convenient, still is difficult for neglected loading; in addition, the extension grooves are arranged on the edges of the two sides of the mounting groove, so that the mounting and dismounting speed of the arc extinguishing cover can be further improved.

Description

Safe and stable contactor

Technical Field

The utility model relates to a contactor technical field, concretely relates to safety and stability's contactor.

Background

In electrical engineering, since a contactor is a device capable of rapidly switching off main circuits of alternating current and direct current and frequently switching on and off a high-current control (up to 800A) circuit, the contactor is often applied to a motor as a control object and also used for controlling electric loads such as plant equipment, electric heaters, mother machines and various electric power units, and the contactor not only can switch on and off the circuit, but also has a low-voltage discharge protection effect. The contactor has large control capacity, is suitable for frequent operation and remote control, and is one of important elements in an automatic control system.

The working principle of the contactor is as follows: when the coil of the contactor is electrified, the coil current can generate a magnetic field, the generated magnetic field enables the static iron core to generate electromagnetic attraction to attract the movable iron core and drive the alternating current contactor to act, the normally closed contact is opened, the normally open contact is closed, and the normally closed contact and the normally open contact are linked. When the coil is powered off, the electromagnetic attraction disappears, the armature is released under the action of the release spring, the contact is restored, the normally open contact is disconnected, and the normally closed contact is closed.

The patent with publication number CN210575747U in the prior art discloses an arc extinguishing device of an ac contactor, which can improve the arc extinguishing speed of the contactor by arranging arc guiding grid sheets and arc extinguishing grid sheets, and improve the breaking capacity of the product, but in the contactor, a plurality of arc extinguishing grid sheets and one arc guiding grid sheet are inserted into the slot of the arc extinguishing chamber, which is inconvenient during assembly and easy to neglected mount, and the independent arc extinguishing grid sheets are unstable in connection in the slot and may shake, and meanwhile, the arc guiding grid sheets are arranged in parallel with the fixed contact at intervals, and the arc striking efficiency is low.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the shortcoming and not enough that prior art exists, and provide an arc extinguishing speed fast, the breaking capacity is strong, safety and stability and convenient assembling's contactor.

The utility model adopts the following technical scheme: a safe and stable contactor comprises a shell, a fixed contact fixed in the shell and a movable contact which can be contacted with or separated from the fixed contact, an arc extinguishing chamber is arranged at one side of the matching part of the static contact and the movable contact, the static contact is connected with an arc striking sheet, one end of the arc striking sheet extends to the arc extinguishing chamber, the arc extinguishing cover comprises a cover body and a plurality of arc extinguishing grid pieces which are arranged in parallel in the cover body, the cover body is provided with a groove part for inserting the arc extinguishing grid pieces, the side walls of the two sides of the groove part are provided with jacks, the two sides of the arc-extinguishing grid sheet are provided with insertion blocks which can be inserted into the jacks, the bottom of the groove part is provided with a convex block for separating arc-extinguishing grid plates, the bottom of the groove part is provided with a plurality of through holes which are all positioned between the arc-extinguishing grid plates and the arc-extinguishing grid plates, the arc extinguishing chamber is characterized in that a mounting groove for inserting the arc extinguishing chamber is formed in the shell, and extending grooves are formed in the edges of two sides of the mounting groove.

The arc striking piece is L-shaped, one end of the arc striking piece is connected with the fixed contact, and the other end of the arc striking piece extends into the mounting groove and is limited between the cover body and the inner wall of the shell.

The arc extinguishing grid piece is provided with a V-shaped notch and faces the fixed contact.

And the V-shaped gap end of the arc extinguishing grid piece extends out of the cover body and is abutted against the side wall and the bottom surface of the mounting groove.

The side wall of the shell is provided with a first opening relative to the position of the arc extinguishing chamber.

The side wall of the fixed static contact of the shell is connected with a wiring assembly, the wiring assembly comprises a base and a wiring terminal arranged in the base, and the wiring terminal is electrically connected with the static contact.

The base is provided with a second opening communicated with the first opening.

The movable contact is arranged on the shell and can move towards the fixed contact, the movable contact is arranged on the shell and is located at the bottom of the installation cavity, and the movable contact is arranged between the upper portion of the installation cavity and the movable contact.

The movable contact is provided with a first limiting lug, the top wall of the mounting cavity is provided with a second limiting lug, and two ends of the contact spring are connected to the first limiting lug and the second limiting lug respectively.

And a coil assembly used for driving the support to move is arranged below the support and comprises a return spring.

The utility model has the advantages as follows: the utility model discloses directly be connected the static contact with the striking plate, can promote the striking speed, and then promoted arc extinguishing efficiency, strengthened the breaking capacity of product, firmly fix a plurality of arc extinguishing bars piece through the cover body simultaneously and constitute the arc extinguishing cover of integral type, only need insert the mounting groove of casing with the arc extinguishing cover when assembling, it is quick and convenient, still difficult neglected loading, the whole arc extinguishing cover is installed more stably in the mounting groove simultaneously, is difficult for rocking; in addition, the extension grooves are arranged on the edges of the two sides of the mounting groove, so that the mounting and dismounting speed of the arc-extinguishing chamber can be further improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings obtained from these drawings still belong to the scope of the present invention without inventive laboriousness.

FIG. 1 is an exploded view of the present invention;

FIG. 2 is a partial schematic view of the present invention;

figure 3 is a schematic view of an arc chute of the present invention;

fig. 4 is a schematic view of the middle cover body of the present invention;

fig. 5 is a schematic view of a housing according to the present invention;

FIG. 6 is a second partial schematic view of the present invention;

in the figure, 1-shell, 101-mounting groove, 102-extension groove, 2-static contact, 3-moving contact, 31-first limit bump, 4-arc-extinguishing cover, 41-cover body, 411-groove part, 412-jack, 413-bump, 414-through hole, 42-arc-extinguishing grid sheet, 421-plug block, 422-V-shaped notch, 5-arc-striking sheet, 6-first opening, 7-wiring component, 71-base, 72-wiring terminal, 73-second opening, 8-bracket, 81-mounting cavity, 811-second limit bump, 9-contact spring, 10-coil component and 11-reset spring.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings.

It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are used for distinguishing two entities with the same name but different names or different parameters, and it is understood that "first" and "second" are only used for convenience of expression and should not be construed as limitations to the embodiments of the present invention, and the following embodiments do not describe the embodiments one by one.

The terms of direction and position in the present invention, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "top", "bottom", "side", etc., refer to the direction and position of the attached drawings. Accordingly, the use of directional and positional terms is intended to illustrate and understand the present invention and is not intended to limit the scope of the invention.

As shown in fig. 1 to 5, for the present invention provides an embodiment:

a safe and stable contactor comprises a shell 1, a fixed contact 2 fixed in the shell 1 and a movable contact 3 capable of contacting or separately matching with the fixed contact 2, wherein corresponding conductive contacts are respectively arranged on the fixed contact 2 and the movable contact 3, an arc extinguishing chamber 4 is arranged on one side of a matching position of the fixed contact 2 and the movable contact 3, the fixed contact 2 is connected with an arc striking sheet 5, one end of the arc striking sheet 5 extends to the arc extinguishing chamber 4, when the movable contact 2 and the fixed contact 3 are disconnected to generate electric arcs, most of the electric arcs are directly led into the arc extinguishing chamber 4 through the arc striking sheet 5, the electric arcs remained on the fixed contact 2 can be transmitted to the arc extinguishing chamber 4 along the arc striking sheet 5, the fixed contact 2 is directly connected with the arc striking sheet 5, the residual electric arcs on the fixed contact 2 are effectively reduced, the arc striking speed can be increased, the arc extinguishing efficiency is increased, and the disconnection capability of products is enhanced.

The arc extinguishing cover 4 comprises a cover body 41 and a plurality of arc extinguishing bars 42 which are arranged in parallel in the cover body 41, the cover body 41 is provided with a groove portion 411 for inserting the arc extinguishing bars 42, the side walls of two sides of the groove portion 411 are provided with insertion holes 412, two sides of the arc extinguishing bars 42 are provided with insertion blocks 421 capable of being inserted into the insertion holes 412, the plurality of arc extinguishing bars 42 are firmly fixed to form the integrated arc extinguishing cover 4 through the cover body 41, the bottom of the groove portion 411 is provided with a bump 413 for separating the arc extinguishing bars 42, the air spacing distance between the adjacent arc extinguishing bars 42 or between the arc extinguishing bars 42 and arc striking plates 5 is ensured to be equal, the arc striking distance from the arc extinguishing bars 42 to the bending end of the arc striking plate 5 is also enabled to be the same, each arc extinguishing bar 42 can fully play an arc extinguishing role, and the arc extinguishing efficiency is improved; the bottom of the groove portion 411 is provided with a plurality of through holes 414 and is located between the arc-extinguishing grid plates 42 and the arc-extinguishing grid plates 42, and hot air generated during arc extinguishing can flow out of the through holes 414, so that temperature rise is avoided.

The shell 1 is provided with an installation groove 101 for inserting the arc extinguishing cover 4, the edges of two sides of the installation groove 101 are provided with extension grooves 102, when the arc extinguishing cover 4 is assembled, the arc extinguishing cover 4 only needs to be inserted into the installation groove 101 of the shell 1, the assembly is quick and convenient, compared with an arc extinguishing grid piece in a bulk mode, the installation is not easy to miss, and meanwhile, the whole arc extinguishing cover 4 is stably installed in the installation groove 101 and is not easy to shake; and the extension grooves 102 are arranged on the two side edges of the mounting groove 101, so that fingers can extend into the mounting groove during mounting and dismounting, the mounting and dismounting speed of the arc-extinguishing chamber can be further improved, and meanwhile, the air around the arc-extinguishing chamber 4 can flow conveniently for heat dissipation.

The arc striking plate 5 is L-shaped, one end of the arc striking plate is connected with the fixed contact 2, the other end of the arc striking plate extends into the mounting groove 101 and is limited between the cover body 41 and the inner wall of the shell 1, so that the arc striking plate 5 and the arc extinguishing cover 4 are connected stably, the arc striking stability is improved, meanwhile, the width of the connecting end of the arc striking plate 5 and the arc extinguishing cover 4 is the same as that of the cover body 41, the cover body 41 can be covered, the arc striking area of an electric arc is enlarged, and the arc striking speed is improved.

The arc extinguishing grid piece 42 is provided with the V-shaped notch 422 and faces the static contact 2, long electric arcs can be cut into short electric arcs, the contact area of the electric arcs and air is increased, the discharging efficiency is improved, the arc extinguishing speed is improved, and the arc extinguishing efficiency of products is further improved.

The V-shaped gap end of the arc-extinguishing grid 42 extends out of the cover body 41 and is abutted against the side wall and the bottom surface of the mounting groove 101, the arc-extinguishing grid 42 is close to a static contact, the arc-striking distance is shortened, and the arc-striking speed is increased.

A first opening 6 is formed in the side wall of the housing 1 corresponding to the position of the arc extinguishing chamber 4, a wiring component 7 is connected to the side wall of the stationary contact 2 fixed to the housing 1, the wiring component 7 includes a base 71 and a wiring terminal 72 arranged in the base 71, the wiring terminal 72 is electrically connected to the stationary contact 2, and a second opening 73 communicated with the first opening 6 is formed in the base 71; can derive the steam that arc extinguishing cover 4 arc extinguishing produced fast through the first opening 6 and the second opening 73 of intercommunication, prevent the temperature rise, protection contactor, increase of service life.

A support 8 capable of moving towards the direction of the static contact 2 is arranged in the middle of the shell 1, an installation cavity 81 is arranged on the support 8, the movable contact 3 penetrates through the installation cavity 81 and is positioned at the bottom of the installation cavity 81, and a contact spring 9 is arranged between the upper part of the installation cavity 81 and the movable contact 3; a first limiting bump 31 is arranged on the moving contact 3, a second limiting bump 811 is arranged on the top wall of the mounting cavity 81, and two ends of the contact spring 9 are respectively connected to the first limiting bump 31 and the second limiting bump 811; the direction of the bias force applied to the moving contact 3 by the contact spring 9 is kept unchanged, so that the joint breaking of the moving contact 3 and the static contact 2 is more stable, and the safety and the reliability of a product in use are improved.

And a coil assembly 10 for driving the support 8 to move is arranged below the support 8, and the coil assembly 10 comprises a return spring 11, so that the switch-on and switch-off circuit of the contactor and the low-voltage release protection effect can be realized.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, which is defined by the appended claims.

Claims

1. A safe and stable contactor comprises a shell (1), a fixed contact (2) fixed in the shell (1) and a movable contact (3) capable of contacting or separately matching with the fixed contact (2), and is characterized in that an arc extinguishing cover (4) is arranged on one side of a matching part of the fixed contact (2) and the movable contact (3), the fixed contact (2) is connected with an arc striking plate (5), one end of the arc extinguishing cover extends to the arc extinguishing cover (4), the arc extinguishing cover (4) comprises a cover body (41) and a plurality of arc extinguishing grid plates (42) arranged in parallel in the cover body (41), the cover body (41) is provided with a groove part (411) for inserting the arc extinguishing grid plates (42), the side walls on two sides of the groove part (411) are provided with jacks (412), the two sides of the arc extinguishing grid plates (42) are provided with insertion blocks (421) capable of being inserted into the jacks (412), the bottom of the groove part (411) is provided with a convex block (413) for separating the arc extinguishing grid plates (42), the bottom of the groove portion (411) is provided with a plurality of through holes (414) and is located between the arc extinguishing grid pieces (42) and the arc extinguishing grid pieces (42), the shell (1) is provided with a mounting groove (101) for inserting the arc extinguishing cover (4), and the edges of two sides of the mounting groove (101) are provided with extending grooves (102).

2. The safe and stable contactor according to claim 1, wherein the arc striking piece (5) is L-shaped, one end of the arc striking piece is connected with the static contact (2), and the other end of the arc striking piece extends into the mounting groove (101) and is limited between the cover body (41) and the inner wall of the shell (1).

3. A safety and stable contactor according to claim 1, characterized in that said arc chute (42) is provided with V-shaped notches (422) and faces said stationary contact (2).

4. A safety and stable contactor according to claim 3, characterized in that the V-notch end of the arc chute (42) extends out of the cover (41) and abuts against the side wall and the bottom surface of the mounting groove (101).

5. A safety and stable contactor according to claim 1, characterized in that the position of the side walls of the housing (1) in relation to the arc chute (4) is provided with a first opening (6).

6. A safe and stable contactor as claimed in claim 5, characterized in that a wiring assembly (7) is connected to the side wall of the housing (1) for fixing the stationary contact (2), the wiring assembly (7) comprises a base (71) and a wiring terminal (72) disposed in the base (71), and the wiring terminal (72) is electrically connected to the stationary contact (2).

7. A safety and stabilising contact according to claim 6, wherein the base (71) is provided with a second opening (73) which communicates with the first opening (6).

8. The safe and stable contactor according to claim 1, wherein a support (8) is disposed in the middle of the housing (1) and can move towards the static contact (2), an installation cavity (81) is disposed on the support (8), the movable contact (3) passes through the installation cavity (81) and is located at the bottom of the installation cavity (81), and a contact spring (9) is disposed between the upper portion of the installation cavity (81) and the movable contact (3).

9. A safety and stability contactor according to claim 8, wherein said movable contact (3) is provided with a first limit projection (31), said mounting cavity (81) is provided with a second limit projection (811) at its top wall, and both ends of said contact spring (9) are respectively connected to said first limit projection (31) and said second limit projection (811).

10. A safety and stability contactor according to claim 8, characterized in that a coil assembly (10) for driving the movement of said support (8) is arranged below said support (8), said coil assembly (10) comprising a return spring (11).