CN2151532Y

CN2151532Y - DC contactor

Info

Publication number: CN2151532Y
Application number: CN 93236048
Authority: CN
Inventors: 蔡松泉
Original assignee: DANYANG LOW-VOLTAGE ELECTRIC EQUIPMENT FACTORY
Current assignee: DANYANG LOW-VOLTAGE ELECTRIC EQUIPMENT FACTORY
Priority date: 1993-01-08
Filing date: 1993-01-08
Publication date: 1993-12-29
Anticipated expiration: 2003-01-08

Abstract

The utility model relates to a low-voltage magnetic blowout type direct current contactor. The moving contact fixed plate of a contact mechanism is respectively provided with a main moving contact and an arc dividing moving contact, a main rack is respectively provided with a main static contact and an arc dividing static contact, the contact mechanism is also connected with a microswitch and a control mechanism thereof, and therefore, the contactor can quickly extinguish the arc in working to reduce the combustion time of the arc on the surface of the contact. Thus, the utility model effectively protects the load performance of the main contacts, enhances the service life of the contactor, and ensures the reliable running of the motor when the system works.

Description

DC contactor

The utility model relates to a kind of low-voltage direct contactor, is suitable for the control usefulness that the battery driven vehicle of supply power voltage below 96 volts (comprising 96 volts) done starting, adjustment, commutation and lifting.

Existing D.C. contactor kind is a lot, and magnetic blow-out formula D.C. contactor also comes out.The contrast Chinese patent, the patent No. is " 88211261.9 " " magnetic blow-out formula D.C. contactor ", though it has magnetic blow-out mechanism, but owing to have only a pair of moving contact and fixed contact in the contact mechanism, make the charged arc disjunction of main contact, thereby make contact surface galvanic corrosion situation serious, shortened the useful life of contactor greatly; In addition owing to there are not auxiliary contact, and sensitive switch and controlling organization thereof, D.C. contactor in use, last contactor is under situation about not disconnecting fully, back one contactor work easily causes short circuit, causes burn-down of electric motor.

The purpose of this utility model will provide a kind of follow-on magnetic blow-out formula D.C. contactor exactly, and it can make the not charged disjunction of main contact, thereby avoids the galvanic action to main contact, prolongs the useful life of main contact, guarantees the reliable running of its place system.

The purpose of this utility model is achieved in that has installed initiatively contact respectively and has divided the arc moving contact on the movable contact fixed head of contact mechanism, main fixed contact has been installed respectively on the body frame and has been divided the arc fixed contact; What be connected with contact mechanism also has a sensitive switch and controlling organization thereof.

The utility model has following advantage:

(1) because the structure that has adopted main contact and divided arcing contact makes the not charged disjunction of main contact, avoided galvanic action, thereby prolonged the useful life of D.C. contactor main contact;

(2) owing to adopted sensitive switch and controlling organization thereof, the action of contactor is under control and self-locking, when reality is used, can be when not disconnecting fully because of last contactor, back starting working of contactor and cause short circuit, thereby guaranteed the reliable running of motor.

Below in conjunction with accompanying drawing an embodiment of the present utility model is explained in detail.

Fig. 1 is the front section view of an embodiment of the utility model;

Fig. 2 is the side sectional view of an embodiment of the utility model.

Present embodiment is a kind of two double break point Direct Action Type D.C. contactor of often opening, and covers (17), body frame (4), contact mechanism, magnetic blow-out mechanism, sensitive switch (14) and controlling organization thereof and electromagnet, coil holder (12), coil etc. by arc extinguishing and forms.Four pairs of initiatively contact (9) and branch arc moving contacts (10) have been installed respectively on the movable contact fixed head (18) of contact mechanism, by sliding sleeve (25), movable contact locating shaft (26) location, initiatively contact damping spring (7) and branch arc moving contact damping spring (8) are fixed on the movable contact locating shaft by spring compressor (28) and split pin (27).Four pairs of main fixed contacts (29) have been installed respectively on the body frame (4) and have been divided arc fixed contact (30), by the M4 bolted.Permanent-magnet steel of magnetic blow-out mechanism (6) and pole shoe (24) are inlaid in respectively on the body frame, and the S of permanent-magnet steel, the N utmost point and pole shoe in the both sides of minute arc moving contact and branch arc fixed contact, form " U " shape magnetic blow-out mechanism respectively.A sensitive switch (14) and the controlling organization thereof in addition that are connected with contact mechanism.Controlling organization comprises that a sensitive switch makes rod (3) and a sensitive switch re-pack (15), sensitive switch is beaten the inside that rod runs through moving iron core (19), regulates iron core (21) and static iron core (22), moving iron core and movable contact fixed head are fastening with the M5 nut, in moving iron core and the adjusting iron core reaction spring (20) have been installed.Base (23) down spot welding has connected a dozen board mounting stands (32), the re-pack aperture (33) of being close on the base of (15) of sensitive switch, and the other end contacts with sensitive switch and is connected, and mid portion is fixed on the installing rack that re-packs, and forms a leverage.The outside of leverage covers with a case (16), and sensitive switch is installed on the sensitive switch installing rack (31).Positive static contact (11) connects positive pole, and negative static contact (5) connects negative pole, and the polarity of positive and negative static contact can not reverse graft.The binding post of pull-in winding (1) access control circuit comes control contactor.

During contactor work, pull-in winding (13) energising, initiatively logical rated current on the contact is moved iron core and is formed magnetic field by coil, yoke (2), base, adjusting iron core etc., and the beginning adhesive drives the work of movable contact fixed head.During adhesive, at first be that branch arc moving contact contacts with dividing the arc fixed contact; Then, initiatively contact contacts with main fixed contact again, makes the sensitive switch in the iron core beat excellent descending, eject the aperture, drive sensitive switch and re-pack, drive sensitive switch work again by re-packing, make the normally closed auxiliary contact of sensitive switch inside become and often drive auxiliary contact, use as self-locking in automatically controlled and control.During release, initiatively contact elder generation and main fixed contact disconnect, and disconnect with minute arc fixed contact behind the branch arc moving contact, and when a minute arc moving contact branch was had no progeny out distance formation, sensitive switch was played rod owing to the effect of reaction spring is gone up, and the sensitive switch normally-closed contact resets.Initiatively contact, main fixed contact adopt the material that silver and rare metal alloy are formed respectively, divide the arc moving contact, divide the arc fixed contact to adopt high are-tight material respectively.Because adhesive and the disconnection at twice of above-mentioned contact system, a time difference is all arranged, make the not charged disjunction of main contact, the electric arc that produces during by the break contact breaking current will be by the magnetic blow-out direction, and disjunction fast makes the arc energy contact surface of blowing off soon.

The rated operational voltage of present embodiment is 24V, 30V, 40V, 48V, 72V, 80V and 96V, and the rated operational current of its main contact is 160A and 400A.

The utility model also can adopt list often to open other forms such as double break point direct dynamic structure.

Claims

1, a kind of D.C. contactor, form by arc extinguishing lid [17], body frame [4], contact mechanism, magnetic blow-out mechanism and electromagnet, coil etc., it is characterized in that having installed respectively on the movable contact fixed head [18] of contact mechanism initiatively contact [9] and divide arc moving contact [10], main fixed contact [29] and branch arc fixed contact [30] have been installed respectively on the body frame [4]; A sensitive switch [14] and the controlling organization thereof in addition that are connected with contact system.

2, D.C. contactor according to claim 1, the controlling organization that it is characterized in that sensitive switch by a sensitive switch beat rod (3) and a sensitive switch re-pack (15) form, sensitive switch is beaten the inside that rod runs through moving iron core (19), regulates iron core (21) and static iron core (22); The aperture (33) of being close on the base (23) that sensitive switch re-packs, the contact of other end and a sensitive switch (14) is connected, and mid portion is connected with a dozen board mounting stands (32) under being arranged on base.

3, according to claim 1,2 described D.C. contactors is characterized in that there is a case (16) the sensitive switch outside that re-packs, and sensitive switch is installed on the sensitive switch installing rack (31).