CN101964278A

CN101964278A - Electromagnetic switch for starter

Info

Publication number: CN101964278A
Application number: CN2010105245581A
Authority: CN
Inventors: 叶龙贵; 王希凡; 李节; 叶辉; 方敏
Original assignee: WUXI VEHICLE ELECTRIC EQUIPMENT CO Ltd
Current assignee: Jiangsu Minxian Electric Drive Technology Co., Ltd.
Priority date: 2010-10-29
Filing date: 2010-10-29
Publication date: 2011-02-02
Anticipated expiration: 2030-10-29
Also published as: CN101964278B

Abstract

The invention discloses an electromagnetic switch for a starter, which comprises a movable core, a sucking coil, a holding coil and a switch cover. One end of the movable core is provided with a movable contact plate and a first restoring spring in turn; the switch cover is provided with a storage battery terminal screw and a starter terminal screw; an auxiliary contact plate and an auxiliary contact are arranged in the switch cover by matching the movable contact plate; a second restoring spring is arranged between the auxiliary contact plate and the switch cover; the auxiliary contact is electrically connected with the sucking coil; and the starter terminal screw is electrically connected with the auxiliary contact through a connecting piece. A double-layer contact plate structure is adopted in the electromagnetic switch for the starter; and during work, a circuit of the tail end of the sucking coil and the starter can be automatically cut off to prevent the sucking coil of the electromagnetic switch from overcurrent, heating and corrosion due to the poor contact of the electromagnetic switch at a main contact or overlong working time when the starter withstands a gear, and the use safety and reliability of the electromagnetic switch are high and the service life of the electromagnetic switch is long.

Description

A kind of starter relay

Technical field

The present invention relates to a kind of electromagnetic switch, especially a kind of starter relay that effectively prevents because of sucking coil overcurrent heating ablation.

Background technology

At present, existing starter relay sees also shown in Figure 1, Fig. 1 is the structural representation of traditional starter relay, it comprises moving iron core 10 and is set in turn in sucking coil 11 and the hold-in winding 12 that moves outside the iron core 10, one end of described moving iron core 10 is disposed with movable contact spring 13 and back-moving spring 14, described movable contact spring 13 and back-moving spring 14 are outside equipped with switch cover 15, described switch cover 15 is provided with terminal screw 16, its operation principle is, when sucking coil 11 is identical with hold-in winding 12 generation flow directions, its electromagnetic attraction mutual superposition, can attract moving iron core 10 to move forward, movable contact spring 13 and terminal screw 16 up to the push rod front end are connected, make the main circuit connection work of starter, after the 13 energising starter work of switch movable contact spring, the operating voltage of starter and switch sucking coil 11 balances of voltage, sucking coil 11 is not worked automatically, confining force work by hold-in winding 12, when electric door lock cuts off the power supply, the moving iron core 10 of switch automatically resets under the effect of back-moving spring 15, movable contact spring 13 and terminal screw 16 disconnect, the main circuit of starter also disconnects, this connected mode is sucking coil 11 and the inner link circuit ground connection of starter, during electromagnetic switch work, movable contact spring 13 contacts closed with terminal screw 16 smoothly, the switch sucking coil will quit work automatically, but, if the starter operating time is long, movable contact spring 13 and terminal screw 16 loose contacts or starter generation apical tooth overlong time all can produce electromagnetic switch sucking coil 11 and ablate, and cause starter relay to use.

Summary of the invention

The object of the present invention is to provide a kind of starter relay, it has simple in structure, can effectively prevent to ablate and the high characteristics of security reliability because of the heating of sucking coil overcurrent.

The objective of the invention is to be achieved through the following technical solutions:

A kind of starter relay, it comprises moving iron core and is set in turn in sucking coil and the hold-in winding that moves outside the iron core, one end of described moving iron core is disposed with the movable contact spring and first elastic component, the described movable contact spring and first elastic component are outside equipped with switch cover, described switch cover is provided with storage battery terminal screw and starter terminal screw, wherein, cooperate movable contact spring in switch cover, to be provided with auxiliary contact and auxiliary contact, described auxiliary contact all electrically connect with starter terminal screw and sucking coil, are provided with second elastic component between described auxiliary contact and the switch cover.

Described first elastic component and second elastic component are spring.

Described starter terminal screw electrically connects by brace and auxiliary contact, the sucking coil leading-out terminal that described switch cover is provided with the coil end of incoming cables and electrically connects with brace.

Beneficial effect of the present invention is, the double-deck contact structure of the inner employing of described starter relay, promptly have additional auxiliary contact and auxiliary contact, during work, but the automatic disconnection sucking coil is terminal and the starter loop, long to prevent electromagnetic switch operating time when main contacts loose contact or the starter apical tooth, the big electric current that starter work is required is auxiliary to starter by the loop of electromagnetic switch sucking coil and starter, cause electromagnetic switch sucking coil overcurrent heating ablation, not only simple in structure, and the security reliability height, long service life.

Description of drawings

With embodiment the present invention is described in further detail with reference to the accompanying drawings below.

Fig. 1 is the structural representation of traditional starter relay;

Fig. 2 is the structural representation of starter relay of the present invention;

Fig. 3 is the winding diagram of the switch cover of starter relay of the present invention;

Fig. 4 is the another winding diagram of the switch cover of starter relay of the present invention;

Circuit diagram when Fig. 5 works for starter relay of the present invention.

Embodiment

Please refer to Fig. 2 and shown in Figure 3, Fig. 2 is the structural representation of starter relay of the present invention; Fig. 3 is the winding diagram of the switch cover of starter relay of the present invention.

A kind of starter relay, it comprises moving iron core 20 and is set in turn in sucking coil 21 and the hold-in winding 22 that moves outside the iron core 20, one end of described moving iron core 20 is provided with the movable contact spring 23 and first back-moving spring 24, the described movable contact spring 23 and first back-moving spring 24 are outside equipped with switch cover 25, and the arranged outside of described movable contact spring 23 has push rod 26, described switch cover 25 is provided with storage battery terminal screw 4 and starter terminal screw 5, cooperate movable contact spring 23 in switch cover 25, to be provided with auxiliary contact 27 and auxiliary contact 28, be provided with second back-moving spring 3 between described auxiliary contact 27 and the switch cover 25, described auxiliary contact 28 electrically connect with sucking coil 21, described starter terminal screw 5 electrically connects by auxiliary contact 27 and auxiliary contact 28, in present embodiment, the outer brace 7 of described sucking coil is arranged at outside the switch cover 25, and the sucking coil leading-out terminal 8 that described switch cover 25 also is provided with coil end of incoming cables 6 and electrically connects with outer brace 7, during energising, when sucking coil 21 is identical with hold-in winding 22 generation flow directions, its electromagnetic attraction mutual superposition, can attract moving iron core 20 to move forward, cause movable contact spring 23 and storage battery terminal screw 4 and starter terminal screw 5 to be connected, simultaneously, push rod 26 by movable contact spring 23 1 ends promotes auxiliary contact 27 disengaging auxiliary contact 28, after the key door outage, rely under the effect of first back-moving spring 24, movable contact spring 23 breaks away from storage battery terminal screw 4 and starter terminal screw 5, rely on 3 effects of second back-moving spring simultaneously down, auxiliary contact 27 contacts with auxiliary contact 28.

See also Fig. 2 and shown in Figure 4, Fig. 4 is the another winding diagram of the switch cover of starter relay of the present invention; In present embodiment, the outer brace 7 of described sucking coil is arranged at outside the switch cover 25, described starter terminal screw 5 electrically connects by outer brace 7 and sucking coil 21 and auxiliary contact 28, and the described switch cover 25 sucking coil leading-out terminal 8 that also is provided with coil end of incoming cables 6 and electrically connects with outer brace 7.

See also Fig. 2 and shown in Figure 5; circuit diagram when Fig. 5 works for starter relay of the present invention; during work; ignition switch K1 closure; when sucking coil N2 is identical with hold-in winding N1 generation flow direction; its electromagnetic attraction mutual superposition; can attract moving iron core 20 to move forward; cause movable contact spring 23 and storage battery terminal screw 4 and starter terminal screw 5 to be connected; be that K switch 2 is connected; meanwhile; under the effect of push rod 26; auxiliary contact 27 and auxiliary contact 28 disconnect; be that auxiliary switch K3 disconnects; also with regard to the loop of automatic disconnection sucking coil N2 end with starter M; long to prevent electromagnetic switch operating time when main contacts loose contact or the starter M apical tooth; the big electric current that starter M work is required is auxiliary to starter M by the loop of electromagnetic switch sucking coil N2 and starter M; cause electromagnetic switch sucking coil N2 overcurrent heating ablation; not only simple in structure; and the defective of ablating with respect to the heating of the existing sucking coil of traditional electrical magnetic switch; increase the ablation that prevents sucking coil that the electromagnetic switch of burn-out proof auxiliary contact connected mode can 100%, improved greatly the safeguard protection of electromagnetic switch and the quality of starter.

Claims

1. starter relay, it comprises moving iron core and is set in turn in sucking coil and the hold-in winding that moves outside the iron core, one end of described moving iron core is disposed with the movable contact spring and first elastic component, the described movable contact spring and first elastic component are outside equipped with switch cover, described switch cover is provided with storage battery terminal screw and starter terminal screw, it is characterized in that: cooperate movable contact spring in switch cover, to be provided with auxiliary contact and auxiliary contact, described auxiliary contact all electrically connect with starter terminal screw and sucking coil, are provided with second elastic component between described auxiliary contact and the switch cover.

2. starter relay according to claim 1 is characterized in that: described first elastic component and second elastic component are spring.

3. according to claim 1 or 2 each described starter relays, it is characterized in that: described starter terminal screw electrically connects by brace and auxiliary contact, the sucking coil leading-out terminal that described switch cover is provided with the coil end of incoming cables and electrically connects with brace.