CN203406232U

CN203406232U - Drives for Electromagnetic Relays

Info

Publication number: CN203406232U
Application number: CN201320389926.5U
Authority: CN
Inventors: 操基德; 凌闯; 孙绍强; 卓超
Original assignee: 40th Institute Of China Electronics Technology Corp
Current assignee: 40th Institute Of China Electronics Technology Corp
Priority date: 2013-07-02
Filing date: 2013-07-02
Publication date: 2014-01-22
Anticipated expiration: 2023-07-02

Abstract

The utility model provides a driving device for an electromagnetic relay, which includes an iron core, a coil, a guide rod and a coil frame, the coil is wound on the coil frame, an iron core is arranged inside the coil frame, and a sleeve is sleeved inside the coil frame. A number of permanent magnets are fixedly placed between the sleeve and the bobbin, the iron core is set in the sleeve, the axial length of the sleeve is greater than the length of the iron core, and the guide rod passes through both sides of the bobbin along the axial direction of the sleeve , The fixed connection between the guide rod and the iron core. Several pieces of permanent magnets are placed opposite to each other with the same pole, and the iron core is magnetized by the permanent magnet. When the coil is connected to the current, a magnetic field is generated in the coil, which drives the magnetized iron core to reciprocate along the axis direction of the coil skeleton, and does not need a reset device such as a spring. The iron core and the guide rod are restored to the initial state, the structure of the whole device is simplified, the stroke displacement of the guide rod driven by the iron core is large, the requirement of long-stroke traction is realized, and the magnetic flux leakage of the driving device of the electromagnetic relay is greatly reduced.

Description

The drive unit of electromagnetic relay

Technical field

The utility model relates to a kind of drive unit of electromagnetic relay.

Background technology

Electromagnetic relay is generally comprised of drive unit, armature, contact reed etc., drive unit consists of iron core and coil, as long as add certain voltage at coil two ends, in coil, will flow through certain electric current, thereby generation galvanomagnetic effect, armature will overcome the pulling force of return spring under the effect of electromagnetic attracting force to be inhaled to iron core, thereby with moving contact and fixed contact (normally opened contact) adhesive of moving armature.After coil blackout, the suction of electromagnetism also disappears thereupon, and armature will return to original position at the reaction force of spring, makes moving contact and original fixed contact (normally-closed contact) release.Adhesive like this, release, thus reached the conducting in circuit, the object of cut-out.

This electromagnetic relay simple in structure, easy to operate, but along with scientific and technological progress, the electromagnetic relay of simple structure has been difficult to meet the circuit requirement that hilted broadsword is thrown (SPNT) more, and common electromagnetic relay also has volume relatively large, stroke traction is short, integrated degree is not high, the electromagnetic drive part of the Open architecture that adjacent electromagnetic relay is traditional divides magnetic disturbance each other large, the structure that is unfavorable for product realizes, high-density installation, during use, installing environmental conditions is required to the shortcomings such as harsh.

Summary of the invention

Technical problem to be solved in the utility model is to provide the drive unit of the electromagnetic relay of little, the long stroke traction of a kind of volume.

For solving the problems of the technologies described above, the utility model provides a kind of drive unit of electromagnetic relay, comprise iron core, coil, guide rod and coil rack, coil winding is on coil rack, in coil rack, be provided with iron core, in coil rack, be socketed with cannulated sleeve, between sleeve and coil rack, fixed placement has some permanent magnets, iron core sleeve is connected in sleeve, the axial length of sleeve is greater than the length of iron core, guide rod, is fixedly connected with between guide rod and iron core through coil rack both sides along the axial direction of sleeve.

Adopt after such structure, iron core is placed in sleeve, iron core can move along the axial direction of sleeve in sleeve, the homopolarity of some permanent magnets is relatively circumferentially distributed in the outside of sleeve, iron core is subject to permanent magnet magnetization, make iron core move to the extreme position of the interior upper end of sleeve or lower end, and be fixed on this extreme position when initial, sleeve is in coil, and the center line of sleeve and the axial direction of coil consistent, during coil making current, in coil, produce coil magnetic field, if coil magnetic field and magnetic field of permanent magnet opposite direction, and when the coil magnetic field active force that iron core is subject to is greater than the magnetic fields power of the permanent magnet that iron core is subject to, drive iron core along the center line movement of sleeve to sleeve in the extreme position of the other end, now when iron core, be no longer subject to the used time of doing of coil magnetic field power, iron core can rest on above-mentioned extreme position, can not return to extreme position when initial, between iron core and guide rod, be fixedly connected with, the motion of iron core and then the reciprocating motion of drive guide rod, coil rack outside is stretched out respectively at guide rod two ends.Good effect of the present utility model is: do not need the resetting means such as spring that iron core and guide rod are restPosed, simplify the structure of whole device, iron core drives the travel displacement of guide rod motion large, has realized the requirement of long stroke traction.

In order better to understand technology contents of the present utility model, below the drive unit of electromagnetic relay is installed referred to as this.

The upper and lower both sides of coil rack of this device are fixedly connected with respectively upper end cover and the bottom end cover of permeability magnetic material, are provided with the upper Clip Reed of NULL on upper end cover, and bottom end cover is provided with the lower circlip sheet of NULL; The sidewall of coil rack is fixedly connected with the bluff piece of at least one permeability magnetic material.

Adopt after such structure, upper end cover and bottom end cover and at least one bluff piece inwall form the magnetic structure of a sealing, and by regulating the thickness of upper Clip Reed and lower circlip sheet to regulate the working point of whole magnetic circuit, when the thickness of upper Clip Reed and lower circlip sheet is thick, the magnetic field intensity of coil relatively a little less than, during the thin thickness of upper Clip Reed and lower circlip sheet, the magnetic field intensity of coil is relatively strong, make the magnetic force of whole electromagnet apparatus adjustable within the specific limits, greatly increased the scope of application of this device, the drive unit of a plurality of electromagnetic relays is coupled little each other, can realize high-density installation, volume urine is expanded in multichannel, make this install more convenient structure hilted broadsword and throw radio-frequency (RF) coaxial relay product more.

The coil of this device is wound around by two strands of wires, and a public terminal of formation in parallel between arbitrary end of two strands of wires; Adopt after such structure, the control circuit of electromagnetic relay mostly is direct current, two strands of wires are wrapped in respectively on coil rack, form two windings, public terminal forms loop with the other end of two strands of wires respectively, opposite current between two windings, the magnetic direction of generation is contrary, and then drives the stressed reciprocating motion of iron core.

There are several binding posts the coil rack upper end of this device; Adopt after such structure, the terminal of wire is fixed on wire column, convenient installation.

The cross sectional shape of the sleeve of this device is polygon; Adopt after such structure, prevent from occurring circumferentially to rotate during sleeve and permanent magnet are when device running.

The mandrel lower of this device is protruding frustum; Adopt after such structure, make iron core when stressed displacement, in whole course of action, suction is even, and the resistance while reducing iron core motion.

Accompanying drawing explanation

Fig. 1 is the structural representation of this device embodiment coil rack.

Fig. 2 is the vertical view of this device embodiment coil rack.

Fig. 3 is that Fig. 2 is along the cutaway view of A-A direction.

Fig. 4 is the stereogram of this device embodiment coil rack.

Fig. 5 is the cutaway view of this device example structure schematic diagram.

Fig. 6 is the stereogram of this device embodiment.

Embodiment

As shown in Figures 1 to 4

Coil rack 1 is hollow shaft shape, on the outer wall of coil rack 1, there is coil recess 1a, the trend of coil recess 1a is consistent with the axial direction of coil rack 1, on the inwall of coil rack 1, there are six permanent magnet groove 1b, six permanent magnet groove 1b become even circle distribution on coil rack 1 inwall, and coil rack 1 upper surface is welded with three binding post 1c.

As shown in FIG. 5 and 6

In the coil recess 1a of coil rack 1 outer wall, there is coil 2, coil 2 comprises and is wound with two strands of enamelled wires, form respectively the first winding and the second winding, one end of the first winding and the second winding is in parallel, form public terminal, make whole coil 2 have two windings and three terminals, three terminals of coil 2 are separately fixed on three binding post 1c of coil rack 1.

In coil rack 1, be socketed with sleeve 3, the centerline direction of sleeve 3 is consistent with the axial direction of coil rack 1, the cross sectional shape of sleeve 3 is regular hexagon, the centerline of the center line of coil rack 1 and sleeve 3 is on same straight line, between sleeve 3 and coil rack 1, be placed with six permanent magnets 4, permanent magnet 4 is fixed in the permanent magnet groove 1b that coil rack 1 inwall is corresponding, six permanent magnet 4 difference homopolarity positioned opposite.

In sleeve 3, be socketed with iron core 5, the bottom of iron core 5 is protruding frustum, the cross sectional shape at iron core 5 rear portions is the shape of agreeing with sleeve 3 cross sections, the length of iron core 5 is less than the length of sleeve 3, iron core 5 can move in sleeve 3, and the centerline of the center line of iron core 5 and sleeve 3 is on same straight line.

Upper end cover 6 is arranged at coil rack 1 top, upper end cover 6 is bonded with Clip Reed 8, upper end cover 6 and upper Clip Reed 8 leave respectively the through hole that agrees with binding post 1c, binding post 1c stretches out Clip Reed 8 outsides, bottom end cover 7 is arranged at coil rack 1 bottom, bottom end cover 7 is bonded with lower circlip sheet 9, on coil rack 1 outer wall, be bolted two bluff pieces 11 that agree with coil rack 1 outer wall, upper Clip Reed 8 and lower circlip sheet 9 are all NULL, upper end cover 6, bottom end cover 7 and bluff piece 11 are all permeability magnetic material, upper end cover 6, bottom end cover 7 and bluff piece 11 form an enclose inside formula magnetic structure.

Guide rod 10 passes iron core 5 along the centerline direction of sleeve 3, and is fixedly connected with iron core 5 by bearing pin, and point-blank, the upper and lower both sides of coil rack 1 are stretched out respectively at the two ends of guide rod 10 to the center line of the center line of guide rod 10 and sleeve 3.

During use, permanent magnet 4, by iron core 5 magnetization, drives iron core 5 to move, and contacts with upper end cover 6, makes iron core 5 be fixed on the interior upper end position of sleeve 3; Three terminals of whole coil 2 are connected with the external world by binding post 1c respectively, when two terminals of the first winding have electric current to connect, the first winding can be in magnetic field of the interior generation of coil rack 1, and the direction in this magnetic field is contrary with the magnetic direction that six permanent magnets 4 form, when the magnetic fields power that iron core 5 is subject to the first winding is greater than the magnetic fields power of the permanent magnet 4 that iron core 5 is subject to, and then drive and to be magnetized iron core 5 and downward move, and then drive guide rod 10 to move, iron core 5 contacts with bottom end cover 7, and is fixed on the lower end position in sleeve 3; Disconnect the two ends electric current of the first winding, iron core 5 can be stayed the lower end position in sleeve 3, electric current is connected the two ends electric current of the second winding again, the second winding can be in magnetic field of the interior generation of coil rack 1, make iron core 5 drive guide rod 10 towards again moving to the upper end position in sleeve 3, now the first winding and the second winding all do not have electric current access, and iron core 5 can be fixed on the interior upper end position of sleeve 3 by iron core 5.

This device can be selected according to different size of current the permanent magnet 4 of different magnetic field intensitys, and permanent magnet and enamelled wire are commercially available prod.

Above-described is only a kind of execution mode of the present utility model; it should be pointed out that for the person of ordinary skill of the art, do not departing under the prerequisite of the utility model principle; can also make some modification and improvement, these also should be considered as belonging to protection range of the present utility model.

Claims

1. the drive unit of electromagnetic relay, comprise iron core, coil, guide rod and coil rack, coil winding is on coil rack, in coil rack, be provided with iron core, it is characterized in that: in coil rack, be socketed with cannulated sleeve, between sleeve and coil rack, fixed placement has some permanent magnets, iron core sleeve is connected in sleeve, the axial length of sleeve is greater than the length of iron core, and guide rod, is fixedly connected with between guide rod and iron core through coil rack both sides along the axial direction of sleeve.

2. the drive unit of electromagnetic relay according to claim 1, it is characterized in that: the upper and lower both sides of described coil rack are fixed with respectively upper end cover and the bottom end cover of permeability magnetic material, upper end cover upside is provided with the upper Clip Reed of NULL, and bottom end cover downside is provided with the lower circlip sheet of NULL; The sidewall of coil rack is fixedly connected with the bluff piece of at least one permeability magnetic material.

3. the drive unit of electromagnetic relay according to claim 1, is characterized in that: described coil is wound around by two strands of wires, and a public terminal of formation in parallel between arbitrary end of two strands of wires.

4. the drive unit of electromagnetic relay according to claim 3, is characterized in that: there are several binding posts described coil rack upper end.

5. according to the drive unit of the arbitrary described electromagnetic relay of claim 1 to 4, it is characterized in that: the cross sectional shape of described sleeve is polygon.

6. the drive unit of electromagnetic relay according to claim 5, is characterized in that: described mandrel lower is protruding frustum.