CN2881943Y

CN2881943Y - Electromagnetic switch

Info

Publication number: CN2881943Y
Application number: CN 200620002146
Authority: CN
Inventors: 张金丽
Original assignee: YUEQING DONGKE ELECTRON CO Ltd
Current assignee: YUEQING DONGKE ELECTRON CO Ltd
Priority date: 2006-02-07
Filing date: 2006-02-07
Publication date: 2007-03-21
Anticipated expiration: 2016-02-07

Abstract

The utility model discloses an electromagnetic switch. When pressing insulation resistor [3], by the lever principle of a bridge [7], a movable contact holder [16] moves upward, and drives the movable contact terminal [19] to make a movable contact [18] communicated with a fixed contact [15] on a fixed contact terminal [14], the power becomes on, the movable and fixed core pick up; when the voltage is too low or at null, the magnetic force of the relay is not enough, by the reverse load of a movable-contact-holder-pressing spring [21], the movable contact terminal [19] disengages from the fixed contact terminal [14], the power becomes off, and the movable contact terminal [19] contacts with a fixed contact terminal [13], so the motor is short circuited and generates reverse electrodynamic force, which forces the motor to stop and realizes instantaneous braking. The utility model is for starting and controlling motors, is furnished with such functions as undervotlage and null voltage protection and emergency braking; is applicable for wooden machinery, bench drills, grinders, machine tools, gardening machinery and electro equipment.

Description

A kind of electromagnetic switch

Technical field

The utility model relates to a kind of appliance switch, relates to a kind of electromagnetic switch or rather, belongs to the appliance switch technical field.

Background technology

At present, mainly there is following defective in electromagnetic switch similar on the market: i.e. two groups of shared action contact frames of moving contact, operating physical force adopt rigidity to connect, and do not have buffering.After using a period of time, burn degree varies because of the contact and cause two groups of contact contact pressures inconsistent, thereby have a strong impact on the useful life of product.

Summary of the invention

The purpose of this utility model is exactly at the deficiencies in the prior art, solves the defective that exists in the above-mentioned prior art, and proposes a kind of electromagnetic switch.

The purpose of this utility model is to be achieved by following technical scheme.

This switch comprises green button and green button stage clip, red button and red button stage clip, panel, bridge plate, fixed contact, moving contact and moving contact stage clip, action contact frame and action contact frame stage clip, moving contact buffer stopper, contact base, coil, coil rack, armature, moving iron core, static iron core, short-circuited conducting sleeve, yoke, installation wing, base, bucker and waterproof frame etc.

Green button 3 and green button stage clip 4 are contained in respectively in the panel 5 with red button 22 and red button stage clip 23, eight fixed contacts 15 insert respectively in four fixed contacts, 13,14 upper holes, four moving contacts 18 insert respectively in two moving contact 19 holes, fixed

contact

13,14 and moving contact 19 link for one by moving contact stage clip 17, action contact frame stage clip 21 with action contact frame 16 and moving contact buffer stopper 20 respectively, are contained in the contact base 12; Short-circuited conducting sleeve 26 embeds in the static iron core 27 upper end grooves, and moving iron core 25 places above the static iron core 27, and armature 24 is enclosed within moving iron core 25 tops, in the coil 9 of packing into then, places on the coil rack 10, reinstalls in the yoke 11; Will be equipped with coil rack 10 yoke 11 and the contact base 12 of action contact frame, moving contact and fixed contact is housed, will move iron core 25 and action contact frame 16 levers by bridge plate 7 and link and be one, in the base 8 of packing into, two the left and right sides that wings 6 are inserted in base 8 respectively is installed; The panel 5 that green button 3, green button stage clip 4 and red button 22, red button stage clip 23 are housed is placed above the base 8, put bucker 1 and waterproof frame 2 at last.

Two-way short circuit braking described in the utility model is to adopt moving contact buffer stopper 20, and by 21 effects of action contact frame stage clip, the excess of stroke that can regulate moving contact 19 on the action contact frame 16 automatically reaches good electrical properties, improves the reliability of switch.

Two-way short circuit described in the utility model braking is to adopt two pairs of normally closed fixed contacts 13 to connect simultaneously, thereby the electromagnetic brake winding moment in the motor that is subjected to switch control is connected, and makes motor produce plugging rapidly, provides the two-way short circuit to brake simultaneously.

Moving iron core 25 and static iron core 27 are adopted in relay described in the utility model position, behind switch connection, can produce good the suction-combining force, can prevent effectively owing to machine produces the outage phenomenon because of the judder adhesive is bad.

The utility model compared with prior art is characterized in:

1, adopts moving contact buffer stopper 20,, can regulate the excess of stroke of moving contact automatically, thereby reach good electrical properties, improve the reliability of switch by the effect of action contact frame stage clip 21 with the moving contact buffer stopper 20 of activity.

2, adopt two pairs of bands to close fixed contact 13 and connect simultaneously, thereby make the interior electromagnetic brake winding momentary connection of motor that is subjected to switch control, and make motor produce plugging rapidly, the braking of two-way short circuit is provided simultaneously.

3, adopt moving iron core 25 and static iron core 27, behind switch connection, produce good the suction-combining force, can prevent effectively since machine because of the bad generation of the sharp pounding adhesive phenomenon of cutting off the power supply.

4, volume is little, power is big.

Description of drawings:

Below in conjunction with the drawings and specific embodiments the utility model is further described.

Fig. 1 is the whole assembling of a utility model generalized section;

Fig. 2 is the utility model relay position generalized section;

Fig. 3 is the local enlarged diagram in Fig. 1 action contact frame position;

Fig. 4 is the whole assembling of a utility model schematic diagram.

Embodiment:

As shown in Figure 1, 2, 3, electromagnetic switch described in the utility model, it is made up of green button 3 and green button stage clip 4, red button 22 and red button stage clip 23, panel 5, bridge plate 7, fixed

contact

13,14, moving contact 19 and moving contact stage clip 17, action contact frame 16 and action contact frame stage clip 21, moving contact buffer stopper 20, contact base 12, coil 9, coil rack 10, armature 24, moving iron core 25, static iron core 27, short-circuited conducting sleeve 26, yoke 11, installation wing 6, base 8, bucker 1 and waterproof frame 2 etc.

Green button 3 and green button stage clip 4 are contained in respectively in the panel 5 with red button 22 and red button stage clip 23; Eight fixed contacts 15 insert respectively in four fixed contacts, 13,14 upper holes, fixed

contact

13,14 and moving contact 19 respectively with action contact frame 16 and moving contact buffer stopper 20, linking by moving contact stage clip 17, action contact frame stage clip 21 is one, be contained in the contact base 12, short-circuited conducting sleeve 26 embeds in the static iron core 27 upper end grooves, and moving iron core 25 places above the static iron core 27, armature 24 is enclosed within moving iron core 25 tops, pack into then in the coil 9, place on the coil rack 10, reinstall in the yoke 11.Will be equipped with coil rack 10 yoke 11 and the contact base 12 of action contact frame, moving contact and fixed contact is housed, will move iron core 25 and action contact frame 16 levers by bridge plate 7 and link and be one, in the base 8 of packing into, two the left and right sides that wing 6 inserts base 8 respectively are installed; The panel 5 that green button 3, green button stage clip 4 and red button 22, red button stage clip 23 are housed is placed above the base 8, put bucker 1 and waterproof frame 2 at last, as shown in Figure 4.

Operation principle of the present utility model is: when pressing start button is green button 3, by the lever principle of bridge plate 7, action contact frame 16 is moved up, drive moving contact 19 makes fixed contact 15 conductings on moving contact 18 and the fixed contact 14, power connection, relay move, separate iron core adhesive work.When brownout or no-voltage, the relay magnetic field force is not enough, under the anti-load forces effect of action contact frame stage clip 21, moving contact 19 is thrown off with fixed contact 14, thereby cuts off the electricity supply, simultaneously the moment of disconnection, moving contact 19 contacts conducting with fixed contact 13, thereby make the motor short circuit produce inverse electromotive force, force motor to stop, have instantaneous braking action.

Electromagnetic switch described in the utility model is applicable to and starts and the control motor to have protection of under voltage protection and no-voltage and emergency braking function; It is applicable to woodworking machinery, bench drill, abrasive machine, graden machine, lathe and electric control appliance etc.

Claims

1, a kind of electromagnetic switch is characterized in that: comprise green button and green button stage clip, red button and red knob stage clip, panel, bridge plate, fixed contact, moving contact and moving contact stage clip, action contact frame and action contact frame stage clip, moving contact buffer stopper, contact base, coil, coil rack, armature, moving iron core, static iron core, short-circuited conducting sleeve, yoke, installation wing, base, bucker and waterproof frame;

Green button [3] and green button stage clip [4] are contained in respectively in the panel [5] with red button [22] and red button stage clip [23]; Eight fixed contacts [15] insert respectively in four fixed contacts [13], [14] upper hole, four moving contacts [18] insert respectively in two moving contacts [19] hole, fixed contact [13], [14] and moving contact [19] link for one by moving contact stage clip [17], action contact frame stage clip [21] with action contact frame [16] and moving contact buffer stopper [20] respectively, are contained in the contact base [12]; Short-circuited conducting sleeve [26] embeds in the groove of static iron core [27] upper end, and moving iron core [25] places above the static iron core [27], and armature [24] is enclosed within moving iron core [25] top, in the coil [9] of packing into then, places on the coil rack [10], reinstalls in the yoke [11]; To the yoke [11] of coil rack be housed and the contact base [12] of action contact frame, moving contact and fixed contact is housed, to move iron core [25] and action contact frame [16] lever by bridge plate [7] links and is one, pack in the base [8], two the left and right sides that wing [6] is inserted in base [8] respectively is installed; The panel [5] that green button [3], green button stage clip [4] and red button [22], red button stage clip [23] will be housed places above the base [8], puts bucker [1] and waterproof frame [2] at last.

2, a kind of electromagnetic switch according to claim 1 is characterized in that: adopt moving contact buffer stopper [20], by the effect of action contact frame stage clip [21] and movable moving contact buffer stopper [20], the excess of stroke of regulating moving contact [19] on the action contact frame [16].

3, a kind of electromagnetic switch according to claim 1 is characterized in that: adopt two pairs of normally closed fixed contacts [13] simultaneously by logical, thereby make the electromagnetic brake winding momentary connection in the motor that is subjected to switch control.

4, a kind of electromagnetic switch according to claim 1 is characterized in that: the adhesive of moving iron core [25] and static iron core [27] is adopted at the relay position.