CN2337662Y - Double-pole AC contact with protective enclosure - Google Patents

Abstract

The utility model relates to a novel double-pole AC contactor, which is composed of a base (1), a base plate (2), yoke irons (3), a wire holder (5), a contact head (6), a protective cover (10), etc. The peripherical space of the switching point of the contact head inside the base (1) is covered with an arc extinguishing chamber (8), and the arc can be quickly extinguished. The lower end surface of the top of the protective cover (10) is correspondingly inosculated with the periphery of the upper end of the base (1). The outer part of the basal plane of the top face corresponding to the switching point of the inner contact head and the outer part of the binding screws (8) of the contact head (6) are respectively provided with a ribbed slab in the reverse form for effectively preventing the outer splash of the arc. The contact head (6) and the inserting piece of the wire holder (5) are sheathed with insulating sheathes (7). The lower part of the wire holder (5) is provided with a protecting cover (11) for ensuring the safety of users.

Description

The bipolar A.C. contactor of band guard shield

The utility model relates to a kind of electromagnetic AC contactor, particularly a kind of bipolar A.C. contactor with guard shield.

The safe application performance of being seen in the market bipolar A.C. contactor product is relatively poor: 1, because the peripheral space at its contact break-make place is very little, arcing time is long, very easily cause contact overheated or electric arc when break-make to break not open and stick together even melting welding, cause institute's matched with electric equipment normally to move, also can initiation fire when serious; 2, the conductive parts that exposes on the original product is too many.For example the protecting cover that its top ends was equipped with is very little, cover cap the position, top at pedestal upper contact head break-make place, and other position on the contact, inserted sheet as terminal screw and two ends place is all exposing, like this, except the easy splash of electric arc when the electric current of make-and-break to the outside, threaten the safety of contiguous electrical equipment, be unfavorable for also outside the operation and maintenance of product that extraneous greasy dirt, dust and other impurities is also as easy as rolling off a log to pollute or corrode contact and binding post, influences its useful life; And for example the coil in the original product is directly to be welded on the junction block of coil after the tap doubling with its enamelled wire, and its tap place intensity is relatively poor, and careless slightly just can being bumped broken and the influence use during installation and maintenance.

The purpose of this utility model be disclose that a kind of arc quenching effect is good, electric arc is difficult for spattering and is sprayed onto outside, safe application performance is good, electric life is long novel bipolar A.C. contactor.

This novel bipolar A.C. contactor also is by a pedestal and the junction block of the coil that is packed in base plate on the base bottom face, is fitted in yoke in the pedestal, match with yoke, coil, constitute in order to the contact of electric current of make-and-break and the protecting cover that is fitted on the pedestal top end face.For realizing the purpose of foregoing innovation and creation, we have taked following technical measures: the peripheral space at the contact break-make place in pedestal has installed arc-extinguish chamber additional; The peripheral corresponding of the periphery of lower surface, newly-designed protecting cover top and pedestal upper end coincide, and respectively falls perpendicular a slice gusset of putting with respect to the outside left of the outside left at contact break-make place in the pedestal and contact terminal screw on the lower surface of new protecting cover end face; Newly designed insulating sleeve, be sleeved on the inserted sheet on the junction block of contact and coil; Designed lead wire sheath, spiral-lock is on the position of junction block welding coil tap lead.

In the utility model, newly-installed arc-extinguish chamber has and well removes liberation, the electric arc sustained combustion that causes because of free of air when it can stop the contact break-make effectively, electric arc is extinguished very soon, avoid contact burning, melting welding, thereby improve the make-break capacity of product, prolong the electric life of product; After newly-designed protecting cover and pedestal are equipped, with the position of contact except that inserted sheet well capping get up, double-deck gusset forms double protection to contact, not only can prevent the outside splash of electric arc, prevent that pollutants such as dust, foreign material from entering the contact position, also improved the fail safe that product uses greatly.The utility model in the wire bonds position of the junction block of coil spiral-lock the lead-in wire guard shield, strengthened protection, the more convenient installation and maintenance to coil lead; Suit insulating sleeve on the inserted sheet of the junction block of contact and coil (be connected lead with inserted sheet as need, insulating sleeve need only be taken off get final product), it is exposed that the conductive component of product is not had, and got rid of the possibility that the user gets an electric shock unintentionally fully, thoroughly guaranteed to use the peace gold.

Below, in conjunction with the accompanying drawings preferred embodiment of the utility model is described in detail:

Fig. 1 is a general structure schematic diagram of the present utility model;

Fig. 2 is the protecting cover view that is inverted.

Pedestal (1) adopts tapping screw to be connected with base plate (2), and complete available existing processes is implemented.Used yoke (3) and be still by the lower end part of now using technique device in the middle of pedestal (1) with the equipped coil (4) of yoke (3), junction block (5) device of coil (4) is in the side of coil (4), and contact (6) then is packed in the pedestal (1) with tapping screw.The product of Packing Intact, on each inserted sheet (being with little bore portion) of contact (6) and junction block (5) all suit an insulating sleeve (7), when need connecting lead, remove insulating sleeve (7) and get final product.Arc-extinguish chamber (8) is with having insulation, fire-retardant, the pottery of are-tight characteristic, plastic or other material, make and the shape of the peripheral space at the interior contact break-make of pedestal (1) place and " U " shape member that size matches, the plug-in mounting button covers on the peripheral space at the interior contact break-make of pedestal (1) place.Wherein the most simple embodiment is to cut out with the thick vulcanized fiber board of 0.3～1.5mm to be width and the interior contact break-make of pedestal (1) place grooves on two sides matches, length is width 5～7 times strip piece, and inflection placed in the middle becomes " U " shape.Insulating sleeve (7), protecting cover (10), with the equipped lead-in wire guard shield (11) in junction block (5) welding coil tap lead position, all be to adopt engineering plastics to make.The peripheral corresponding of the periphery of the lower surface, top of protecting cover (10) and pedestal (1) upper end coincide, respectively fall perpendicularly putting a slice gusset with respect to the outside left of terminal screw (8) on the outside left at the interior contact break-make of pedestal (1) place and the contact on the baseplane of protecting cover (10) end face, the contact break-make place and the external world are separated fully.The thickness of gusset is decided can guarantee its structural strength.The planform of lead-in wire guard shield (11) is that the planform according to junction block (5) corresponding site designs, and mutual equipped bind mode uses the buckle of falling thatch form, guarantees the fastness of assembling.

Claims (2)

1, a kind of bipolar A.C. contactor with guard shield, the coil (4) that it is by pedestal (1) and be packed in base plate (2) on pedestal (1) bottom face, be fitted in yoke (3) in the pedestal (1), match with yoke, the junction block (5) of coil, be packed in the contact (6) in the pedestal (1) and be fitted in protecting cover formations such as (10) on pedestal (1) top end face, it is characterized in that: each is detained and is covering an arc-extinguish chamber (8) in the peripheral space at each contact break-make place of described pedestal (1); The peripheral corresponding of the periphery of the lower surface, top of protecting cover (10) and pedestal (1) upper end coincide, and the outside left of going up terminal screw (8) with respect to the outside left and the contact (6) at the interior contact break-make of pedestal (1) place on the baseplane of protecting cover (10) end face respectively falls to erect is putting a slice gusset; On the inserted sheet of contact (6) and junction block (5) all suit insulating sleeve (7), the bottom spiral-lock of junction block (5) lead-in wire guard shield (11).

2, the bipolar A.C. contactor of band guard shield according to claim 1 is characterized in that: described arc-extinguish chamber (8) is that usefulness has insulation, the shape of material fire-retardant, are-tight characteristic peripheral space that make and the middle contact break-make place of pedestal (1) and " U " shape member that size matches.

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