CN2705881Y

CN2705881Y - Seal DC contactor

Info

Publication number: CN2705881Y
Application number: CN 200420034544
Authority: CN
Inventors: 邹德
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-04-23
Filing date: 2004-04-23
Publication date: 2005-06-22
Anticipated expiration: 2014-04-23

Abstract

The sealed direct-current contactor that the utility model relates to, the external structure that it is made up of housing (1), mounting panel (8), seat board (9), calotte (21), the internal structure of compositions such as magnetic pole (2), core bar (3), coil block (4), electromagnet (5), return spring (6), (7), moving contact (10) unshakable in one's determination, control strip (14), contact spring leaf (15), quiet contact chip (16), split pin is sealed in wherein, only there are two butted line screws to be exposed to outside the seat board, realize all-sealed structure, thereby improve the reliability of contactor and prolong its useful life.

Description

The sealed direct-current contactor

(1) technical field:

The utility model relates to a kind of sealed direct-current contactor, be to be used for closure, disconnection or the conversion of remote operation high-power circuit, be a kind of electromagnetic switch electrical equipment, it mainly is applicable to engineering machinery, battery vehicle, electri forklift, automobile, communication power supply, electric-control systems such as uninterrupted power supply belong to the electrical equipment production technical field.

(2) background technology:

D.C. contactor is a kind of high power switch electrical equipment, requires to have bigger contact force and contact break distance, therefore requires electromagnet to have bigger suction and stroke.So early stage contactor adopts the bridging contact of screwed pipe suction-type magnetic system and double break point more.State such as Russia, method and China contactor overwhelming majority remain and adopt suction-type non-tight structure up to date.

The electromagnet of existing D.C. contactor adopts the double winding coil more, at housing bottom a pair of auxiliary normally-closed contact is arranged, when contactor is not worked, it is keeping the winding short circuit, the core bar lower end plastic compression of contactor has the insulation head, pass magnetic pole, be used to promote auxiliary contact switch, because of auxiliary contact are placed on housing bottom, promoting auxiliary contact by core bar disconnects, at housing bottom a hole just must be arranged, the lead-out wire of coil is drawn from the bottom and the limit of housing respectively, therefore on the bottom of housing and limit, a fairlead is arranged again respectively, because the existence of these fairleads, make original D.C. contactor form unsealed structure, and between little calotte and housing, electromagnet, mounting panel, between the base plate assembly, all be to prevent sealing between calotte and the base plate assembly by their binding face of screw, salt fog, harmful substances such as dust enter its inner generation corrosion, contact oxidation, the electrical apparatus insulation performance reduces, defective at above-mentioned existing product, the structure fabrication of non-tight formula is helped sealed construction, thereby improve the reliability and the useful life of D.C. contactor, and advantages such as it is little to have volume, and load capacity is big.

(3) summary of the invention:

Sealed direct-current contactor described in the utility model, it is mainly by housing unit, magnetic pole, coil block, electromagnet, core bar, return spring, mounting panel, base plate assembly (contact spring leaf, quiet contact chip), screw, moving contact, contact spring, control strip, insulating washer, split pin, calotte are formed up and down.1, the position of auxiliary switch is arranged on the top of D.C. contactor, with contact spring leaf, quiet contact chip respectively riveting be contained on the binding post of lead-out wires of coil and form auxiliary switch, the groove of lead-out wires of coil being guided to seat board is with interior and be welded on respectively on the binding post of lead-out wires of coil, and it is whole that housing bottom and top calotte all make a sealing; 2, magnetic pole bottom atresia is fixed on magnetic pole on the housing; 3, establish a depression frame at base plate assembly and mounting panel binding face place, mounting panel and electromagnet are enclosed in wherein, and the installed surface bending of mounting panel is protruded, make it be higher than the base plate assembly plane; 4, the terminal screw of quiet contact chip assembly, lead-out wires of coil and binding post are embedded in by injection moulding and make it reach sealing in the seat board; 5, on seat board, be provided with the groove of sealing around, the internal wiring terminal of moving contact, lead-out wires of coil is arranged within the encirclement.Lead-out wires of coil is welded on the binding post, calotte is bumped in the sealed groove seals.So only have only the terminal screw and a pair of lead-out wires of coil terminal screw of a pair of quiet contact chip assembly to be emerging in the seat board outside, and the base portion of two butted line screws all is to be embedded in by injection moulding to form overall structure in the seat board, makes it reach the purpose of sealing.

After the contactor coil energising, iron core is switched on or switched off high-current circuit with regard to being with the moving contact motion, when iron core moves to certain residual gap, by the control strip on the contact spring, to assist normally-closed contact to open, make the adhesive winding and keep winding to become serial connection, make contactor remain on the attracted position with less operating current.To the choice of auxiliary switch, can make double winding and simplex winding contactor.

The beneficial effect of sealed direct-current contactor described in the utility model is: the non-tight contactor is made hermetically sealed contactor can prevent effectively that sealing, pernicious gas, salt fog, dust wait until that harmful substance enters its inside, prevent contact oxidation, corrosion and pollution, and make the current interruption ability of contact not be subjected to influence of atmosphere pressure, make the insulating properties of current-carrying part keep good, not breakdown or burn, thus the reliability and the useful life of improving D.C. contactor.

(4) description of drawings:

Accompanying drawing 1 is the structure chart of sealed direct-current contactor.

In the accompanying drawing 1: the sealed groove of insulating washer, the last insulating washer of 13-, 14-control strip, 21-calotte, 22-seat board upper end under 1-housing, 2-magnetic pole, 3-core bar, 4-coil block, 5-electromagnet, 6-return spring, 7-iron core, 8-mounting panel, 9-seat board, 10-moving contact, 11-contact spring, the 12-.

Accompanying drawing 2 removes the plan structure figure of calotte for the sealed direct-current contactor.

In the accompanying drawing 2: 15-contact spring leaf, the quiet contact chip of 16-, 17-lead-out wires of coil terminal screw, 18-split pin, 19-lead-out wire internal wiring terminal, the quiet contact chip assembly of 20-.

(5) embodiment:

Sealed direct-current contactor described in the utility model contrast accompanying drawing 1,2 is illustrated its structure, and it is made up of housing 1, magnetic pole 2, core bar 3, coil block 4, electromagnet 5, return spring 6, unshakable in one's determination 7, mounting panel 8, seat board 9, moving contact 10, contact spring 11, upper and lower insulating washer 13,12, control strip 14, contact spring leaf 15, quiet contact chip 16, lead-out wires of coil terminal screw 17, split pin 18, lead-out wire internal wiring terminal 19, quiet contact chip assembly 20, calotte 21, seat board sealed groove 22.1, magnetic pole 2 is expanded riveting on housing 1, form housing unit, and be coated with fluid sealant at binding face; 2, coil block 4 is put into housing unit, and rivet tightly, become electromagnet assembly 5 with rivet; 3, contact spring leaf 15, quiet contact chip 16 are contained in respectively on the binding post of seat board 9.Contact spring leaf and quiet contact chip are formed auxiliary contact switch simultaneously; 4, in electromagnet assembly, put into return spring 6, core bar 3, unshakable in one's determination 7 and put mounting panel 8, lead-out wires of coil is passed hole on the seat board, electromagnet 5 is fixed on the seat board with screw; 5, put on the core bar moving contact 10, contact spring 11, down insulating washer 12, control strip 14, on insulating washer 13, packing ring and plug split pin 18; 6, lead-out wires of coil is welded on the seat board sealed groove with on the interior lead-out wire internal wiring terminal 19; 7, calotte 21 cover is gone into seat board on set identical with calotte binding face shape, in the large and small identical groove 22, the sealing of infusion epoxy resin glue; 8, infusion epoxy resin glue in the groove of mounting panel 8 and the binding face of seat board 9.

The technical scheme of sealed direct-current contactor innovation described in the utility model is:

1, the position by contact spring 15 and quiet contact chip 16, control strip 14, the auxiliary contact switch formed is arranged in the seat board annular seal space at D.C. contactor top.With the electromagnetic circuit control device of inside, be made into hermetically sealed integral body by housing 1, seat board 9 and calotte 21, have only outside the terminal screw of a pair of lead-out wires of coil terminal screw 17 and quiet contact chip assembly 20 and mounting panel 8 be exposed to.

2, be provided with a depression frame with the binding face of mounting panel 8 on the seat board 9, mounting panel 8 and electromagnet 5 surrounded wherein fastening, and the installed surface bending of mounting panel 8 protruded from seat board recess plane, make it exceed the seat board plane, be convenient to install.

3, the internal wiring terminal 19 of the lead-out wire of quiet contact chip assembly 20 and coil and lead-out wires of coil terminal screw 17 are embedded in the seat board 9 by injection moulding and are connected as a single entity.

4, on the seat board 9 with to be provided with a shape identical on the binding face of calotte 21, the sealed groove 22 that size is coincide, perfusion fluid sealant in the groove, the auxiliary contact that moving contact 10 contact spring leafs 15, quiet contact chip 16, control strip 14 are formed, and parts such as lead-out wires of coil internal wiring terminal 19 are sealed in the cavity.

5, magnetic pole 2 is made cup-shaped, the bottom atresia, and expand riveting on housing, binding face is coated with fluid sealant.

Claims

1, the utility model is a kind of sealed direct-current contactor, it is by housing (1), magnetic pole (2), core bar (3), coil block (4), electromagnet (5), return spring (6), (7) unshakable in one's determination, mounting panel (8), seat board (9), moving contact (10), contact spring (11), on, following insulating washer (13), (12), control strip (14), contact spring (15), quiet contact chip (16), lead-out wires of coil terminal screw (17), split pin (18), lead-out wire internal wiring terminal (19), quiet contact chip assembly (20), calotte (21), seat board sealed groove (22) is formed, it is characterized in that: by contact spring (15) and quiet contact chip (16), the position of the auxiliary contact switch that control strip (14) is formed is located in the seat board annular seal space at D.C. contactor top, and with the electromagnetic circuit control device of inside by housing (1), seat board (9) and calotte (21) are made into hermetic overall structure.

2, by the described sealed direct-current contactor of claim 1, it is characterized in that: seat board (9) is gone up and the binding face of mounting panel (8) is provided with a depression frame, surround mounting panel and electromagnet (5) wherein fastening, and the installed surface bending of mounting panel (9) protruded from the recess plane, make it be higher than the seat board plane, the internal wiring terminal (19) of the lead-out wire of quiet contact chip assembly (20), coil and lead-out wires of coil terminal screw (17) are that injection moulding is embedded in the seat board (9) and is connected as a single entity.

3, by the described sealed direct-current contactor of claim 1, it is characterized in that: it is identical to be provided with a shape on seat board (9) is gone up binding face with calotte (21), the sealed groove (22) that size is coincide, perfusion fluid sealant in the groove, with moving contact (10), auxiliary contact and lead-out wires of coil internal wiring terminal parts such as (19) thereof that contact spring leaf (15), quiet contact chip (16), control strip (14) are formed are sealed to a cavity, and magnetic pole (2) is made cup-shaped bottom surface atresia.