CN104347319A - Unicoil mechanical self-supported AC (Alternating-Current) contactor - Google Patents

Abstract

The invention belongs to the electromechanical field, in particular to a unicoil mechanical self-supported AC (Alternating-Current) contactor which is characterized in that a moving iron core is connected with a moving contact bracket by virtue of a connecting mechanism; the connecting mechanism is fixedly connected with the moving contact bracket; the moving iron core is in one-way limited connection with the connecting mechanism and is provided with a resetting component; the resetting component is arranged between the moving iron core and a shell or between the moving iron core and a clapboard; an opening and closing mechanism is arranged between the moving iron core and the moving contact bracket; the opening and closing mechanism comprises a swinging arm, a sliding block and a positioning block provided with a peach-shaped operating groove; one end of the swinging arm is fixedly arranged on the clapboard, and the other end of the swinging arm and the sliding block are fixed together; the sliding block is arranged in the peach-shaped operating groove of the positioning block; the peach-shaped operating groove comprises four one-way traps in the same direction; the sliding block can be arranged in the four different one-way traps according to needs of operating states, and a resetting mechanism is arranged between the positioning block and the clapboard. The unicoil mechanical self-supported AC contactor has the advantages of easiness in control and misoperation prevention capability.

Description

Unicoil machinery self-sustaining A.C. contactor

Technical field

The invention belongs to electro-mechanical arts, specifically a kind of unicoil machinery self-sustaining A.C. contactor.

Background technology

Traditional AC contactor touch head needs closed (be operating state hereinafter referred to as contact closure, contact is split up into halted state), then need to make its electromagnet coil power.How long A.C. contactor operating state maintains, and how long electromagnet coil will be energized., there is following shortcoming in this operational mode:

1, coil electricity power consumption, both consumed active energy, more will consume perceptual reactive energy.

2, because coil is energized for a long time, coil easily burns.Line voltage is high, and the electric current that coil passes through is large, and easily burn, line voltage is low, and iron core adhesive is not tight, and electric current increases, and also easily burns out coil.

3, whether tight the contact closure of A.C. contactor is, and be decided by the height of line voltage, line voltage is low, and iron core suction reduces, and contact closure is not tight, easily burns out contact.

4, have between iron core foreign material or voltage low, iron core adhesive is tight, produces noise, contaminated environment.

If when A.C. contactor is in running order, coil can no power, then above-mentioned shortcoming just can overcome.Self-retaining A.C. contactor, be exactly a kind of when A.C. contactor is in running order, its coil is without the need to the contactor of energising.Existing self-hold A.C. contactor, has permanent-magnetic AC contact.This A.C. contactor only needs electromagnet coil brief energization, makes iron core adhesive, and then probe of contactor is closed, and contactor enters operating state.After contactor enters operating state, electromagnet coil, just without the need to being energized, utilizes the magnetic property of iron core again, and remanent magnetism makes iron core continue adhesive, maintains contactor in working order.Pass to direct current in the other direction to electromagnet coil and carry out demagnetization to iron core, iron core can be made to discharge, and separately, contactor just transfers halted state to AC contactor touch head.

In fact, this is a kind of half interchange, half D.C. contactor, and it has the following disadvantages:

1, direct current in circuit, interchange depositing, make circuit complicated.

2, DC electric apparatus is when power-off, and electric arc is difficult to arc extinguishing, uses this contactor, and the arc extinguishing ability of control circuit wants high.The A.C. contactor that rated current is large, it is also large that electromagnet coil passes into direct current, and some small-sized AC relay are difficult to meet this requirement.

3, because the iron core of this contactor is permanent magnetism, when after grid power blackout, contactor cannot be made to be converted to halted state from operating state.Even if take artificial measures, halted state can not be reset to.If what A.C. contactor controlled is can not the equipment of self-starting, can not hand resetting be then fatal defect to halted state.

Also once occurred the mechanical self-sustaining A.C. contactor of twin coil, this A.C. contactor has two cover electromagnet, and is furnished with mechanical locking, and a set of electromagnet makes AC contactor touch head close, and is locked in operating state with mechanical device.When another set of electromagnet is used for transferring A.C. contactor to halted state from operating state, be used for locking device is unlocked.Two cover electromagnet complete combined floodgate and the separating brake of A.C. contactor respectively.The mechanical self-sustaining A.C. contactor of this twin coil has following defect:

1, two cover electromagnet apparatus, make complex structure.

2, due to needs two cover electromagnet apparatus, A.C. contactor installation dimension is made to become large.Renovating of old equipment, because installation dimension is different, becomes difficulty, even cannot transform.New equipment adopts, because its installation dimension is large, the installation dimension of switchboard must be increased.Investment should be increased, more because switchboard cannot increase and cannot adopt.

Also have a kind of A.C. contactor exchanging adhesive, direct current maintenance, the shortcoming that this direct current keeps A.C. contactor to exist is:

1, maintain the operating state of contactor, also will be energized in ferromagnetic iron coil, what only pass into is that direct current forces down, and power consumption can be smaller.

2, the alternating voltage of adhesive is high, and the direct current of maintenance work state forces down, and carries out the switching of high voltage interchange and low voltage and direct current instantaneously, be easy to rectifying device is damaged in same coil.

Although 3, the iron core remanent magnetism of alternating electromagnet is little, but pass into direct current for a long time, also it can be made to magnetize, after power failure, remanent magnetism will slowly disappear, old friend flow adhesive, DC operation A.C. contactor after providing " stopping " instruction, time delay a period of time, contactor could be transformed into halted state from operating state.If " stopping " instruction is provided by " stop button ", " stop button " will by for a long time sometimes.Different A.C. contactors, even if model is identical with manufacturer, time delay length is also different.Wanting time delay during stopping, this equipment stopped instantaneously many requirements, is unallowed.

Summary of the invention

The problem to be solved in the present invention is: the moving contact of A.C. contactor and fixed contact closed after, can not need again the coil making static iron core to continue energising by steady operation.A kind of unicoil machinery self-sustaining A.C. contactor is the invention provides in order to solve this technical problem.

Technical scheme of the present invention is as follows:

Unicoil machinery self-sustaining A.C. contactor, it comprises shell, moving contact, fixed contact, anti-jump spring, moving contact rack, moving contact spring, dynamic iron core, static iron core and coil, be provided with a dividing plate, moving contact in shell, fixed contact, anti-jump spring, moving contact rack, moving contact spring, in dividing plate side, moves iron core, static iron core and coil are at dividing plate opposite side, move and be connected by bindiny mechanism between iron core with moving contact rack, bindiny mechanism and moving contact rack are fastenedly connected, dynamic iron core and bindiny mechanism are unidirectional to be spacingly connected, dynamic iron core is provided with reset components, and this reset components is located between dynamic iron core and shell, or this reset components is located between dynamic iron core and dividing plate, move and be provided with switching mechanism between iron core and moving contact rack, switching mechanism comprises swing arm, slide block and be provided with the locating piece of peach-shaped work nest, swing arm one end is fixed on dividing plate, the other end and slide block are fixed, slide block is located in the peach-shaped work nest of locating piece, peach-shaped work nest comprises four unidirectional traps in the same way, slide block according to operating state need be located in these four different unidirectional traps, be provided with resetting device between locating piece and dividing plate.

The effect of dividing plate shell is divided into two parts and carries out spacing to dynamic iron core, dividing plate has two through holes, and bindiny mechanism is through this through hole; Bindiny mechanism is fixed due to one end and moving contact rack, the other end and dynamic iron core are unidirectional to be spacingly connected, so the effect of bindiny mechanism is when the coil electricity on static iron core will move iron core adhesive, drive moving contact rack moves downward, and during static iron core exterior loop no power, after dynamic iron core resets under reset components effect, bindiny mechanism and moving contact rack do not reset; The effect of switching mechanism is moving contact rack when acted on to partition movement by bindiny mechanism, and slide block the inside motion work in peach-shaped work nest of swing arm end, is positioned moving contact rack by peach-shaped work nest and arranging of unidirectional trap; The effect of resetting device is that slide block can be moved back and forth in locating piece, by forming one-way circulation move with coordinating of unidirectional trap and work nest, thus makes the operating state that contactor reaches different.

Described bindiny mechanism comprises connecting plate, two suspension rods, connecting plate is located at the below of dynamic iron core, the two ends of connecting plate are connected with suspension rod, and two suspension rods are fixedly connected with moving contact rack one end respectively, and the other end arranges nut through connecting plate by end and carries out unidirectional spacing connection.Connecting plate coordinates with suspension rod, and connecting plate is located at dynamic iron core lower end, and there is passing hole at connecting plate two ends, and suspension rod is through passing hole, and nut of screwing in end is formed unidirectional spacing.

Described reset components is spring, and this spring is fixed between dynamic iron core and shell.Move iron core when the effect of spring is can reset and leave static iron core.

Described dividing plate is fixed with outer guide sleeve, described swing arm, resetting device are located in outer guide sleeve, described moving contact rack is fixed with interior fairlead, described locating piece is fixed in interior fairlead, the internal fairlead of outer guide sleeve leads, locating piece is fixed on moving contact rack by interior fairlead, and interior fairlead matched in clearance is in outer guide sleeve.

Described resetting device is back-moving spring.

Described interior fairlead end is connected with moving contact rack by fixed head.

Four described unidirectional traps are clockwise in the same way or counterclockwise in the same way.

Advantage of the present invention is as follows:

1, unicoil machinery self-sustaining A.C. contactor is converted to operating state from halted state, or operating state, utilizes same set of electromagnet as power source;

2, unicoil machinery self-sustaining A.C. contactor is when in running order, and electromagnet coil is no longer energized, economize on electricity;

3, the operating state of unicoil machinery self-sustaining A.C. contactor, rely on mechanical mechanism self-sustaining, confining force is stablized constant, fixed contact can be made reliably closed and by the fluctuation of electrical network voltage levels impact, can avoid because voltage is low, electromagnet suction is little, electric shock loose contact and cause the generation of contact burnout failure;

4, the operating state of unicoil machinery self-sustaining A.C. contactor, relies on mechanical self-sustaining, the obstructed electric current of electromagnet coil, can avoid producing noise, it also avoid the generation of coil burnout accident;

5, State Transferring is the same with common A.C. contactor, does not have the impact of remanent magnetism;

6, unicoil machinery self-sustaining A.C. contactor has been equipped with hand resetting device, once grid power blackout, can manually make it to revert to halted state from operating state;

7, this operation principle can be adopted, the A.C. contactor of existing various model is transformed.Improved product, only Level Change, installation dimension is constant.

accompanying drawing explanation

Fig. 1 is halted state structural representation of the present invention;

Contactor pre-operation status architecture schematic diagram when Fig. 2 is iron core adhesive of the present invention;

Fig. 3 is working state structure schematic diagram of the present invention;

Fig. 4 is pre-stop status architecture schematic diagram of the present invention;

Slide block, swing arm and peach-shaped work nest fit structure schematic diagram when Fig. 5 is halted state of the present invention;

Slide block, swing arm and peach-shaped work nest fit structure schematic diagram when Fig. 6 is pre-operation state of the present invention;

Slide block, swing arm and peach-shaped work nest fit structure schematic diagram when Fig. 7 is operating state of the present invention;

Slide block, swing arm and peach-shaped work nest fit structure schematic diagram when Fig. 8 is pre-stop state of the present invention;

Fig. 9 is peach-shaped work nest floor map;

Figure 10 is that peach-shaped work nest section launches schematic diagram;

Figure 11 is the structural representation of switching mechanism.

Embodiment

As shown in Figure 1, unicoil machinery self-sustaining A.C. contactor, it comprises shell 4, moving contact 2, fixed contact 3, anti-jump spring 1, moving contact rack 5, moving contact spring 7, dynamic iron core 19, static iron core 10 and coil 8, be provided with a dividing plate 17 in shell 4, shell 4 is divided into two parts by this dividing plate 17, moving contact, fixed contact, anti-jump spring, moving contact rack, moving contact spring, in shell 4 part for dividing plate side, moves iron core, static iron core and coil are in shell 4 part for dividing plate opposite side, fixed contact 4 is fixed on the outer surface of shell 4, moving contact rack 5 passes and is provided with the activity space 5a of several rectangles in shell 4, moving contact is located in this activity space, in present embodiment, this activity space is provided with three, and anti-jump spring 1 is just arranged between moving contact 2 and moving contact rack 5 upper end, moving contact spring 7 is arranged between moving contact 2 and moving contact rack 5 lower end, as the anti-jump spring 1 illustrated in Fig. 1, moving contact 2, moving contact spring 7, by being set in sequence in the activity space 5a of moving contact rack 5 up and down, then drives anti-jump spring 1 when moving contact rack 5 moves, moving contact 2, moving contact spring 7 moves, and during this A.C. contactor halted state, moving contact 2 is what to separate with fixed contact 3, and when entering operating state, moving contact 2 and fixed contact 3 are closed, if clearance distance during A.C. contactor halted state between moving contact 2 and fixed contact 3 is s ', if moving contact rack moves downward stroke equal s ', then moving contact 2 just closes with fixed contact 3, moving contact spring be have compressed length s ', in order to make in real work, fixed contact reliably closes, when designing, always make when contactor is in running order, the stroke that moving contact rack moves downward is slightly larger than s ', traveled distance equals s, i.e. s=s '+△ s ', but moving contact 2 moves downward stroke s ' and just runs into fixed contact 3, can not move downward again, anti-jump spring 1 can only be made by compression △ s '.

Move and be connected by bindiny mechanism between iron core 19 with moving contact rack 20, bindiny mechanism and moving contact rack 5 are fastenedly connected, dynamic iron core 19 and bindiny mechanism are unidirectional to be spacingly connected, dynamic iron core 19 is provided with reset components, this reset components is located between dynamic iron core 19 and shell 4, or this reset components also can be located between dynamic iron core 19 and dividing plate 17, dynamic iron core 19 mainly can reset by the effect of reset components, in present embodiment be reset components is arranged on bottom dynamic iron core 19 and shell 4 between, move and be provided with switching mechanism between iron core 19 and moving contact rack 5, as Fig. 1, shown in Fig. 5, switching mechanism comprises swing arm 13, slide block 21 and be provided with the locating piece 6 of peach-shaped work nest 22, be illustrated in figure 9 peach-shaped work nest 22, swing arm 13 one end is fixed on dividing plate 17, the other end and slide block 21 are fixed, slide block 21 is located in the peach-shaped work nest 22 of locating piece 6, peach-shaped work nest 22 comprises four unidirectional traps in the same way, they are respectively trap A1, trap B1, trap C1 and trap D1, slide block 21 needs to be located in these four different unidirectional traps according to operating state, in present embodiment, unidirectional trap is unidirectional counterclockwise, certainly also can be arranged to unidirectional clockwise according to actual conditions, resetting device is provided with between locating piece 6 and dividing plate 17, this resetting device is flexible resetting device, as shown in Figure 10, a portion is from trap A1 to trap B1's, because trap A1 trap B1 is counterclockwise unidirectional trap, so, slide block 21 can only slip into trap B1 from trap A1 by the guide rail of peach-shaped work nest 22, slip in trap A1 by the guide rail of the clockwise peach-shaped work nest 22 again of the anti-limited slip block 21 of the effect of trap B1, b portion is a portion in like manner, and slide block 21 can only slip into trap C1 from trap B1 by the guide rail of peach-shaped work nest 22 as required, c portion is a portion in like manner, and slide block 21 can only slip into trap D1 from trap C1 by the guide rail of peach-shaped work nest 22, d portion is a portion in like manner, and slide block 21 can only slip into trap A1 from trap C1 by the guide rail of peach-shaped work nest 22.

As shown in Figure 1, as a selectable structure of bindiny mechanism, it can comprise connecting plate 9, two suspension rods 16, connecting plate 9 is located at the below of dynamic iron core 19, the two ends of connecting plate 9 are connected with suspension rod 16, two suspension rods 16 are fixedly connected with moving contact rack 5 one end respectively, the other end arranges nut through connecting plate 9 by end and carries out unidirectional spacing connection, suspension rod 16 and moving contact rack 5 is driven to move downward by nut effect when the effect of nut is that iron core drives connecting plate 9 to move downward, and dynamic iron core 19 connecting plate 9 when moving upward that resets also moves upward, suspension rod 16 and moving contact rack 5 is not now then driven to move upward, in reality, connecting plate 9 coordinates with suspension rod 16, connecting plate 9 is located at dynamic iron core 19 lower end, there is passing hole at connecting plate 9 two ends, suspension rod 16 is through passing hole, nut of screwing in end is formed unidirectional spacing.

As shown in Figure 1, as reset components selectable structure, reset components can be spring 18, and this spring 18 is fixed between dynamic iron core 19 and shell 4 bottom interior wall, spring 18 provides elastic force upwards that active iron core 19 to be speeded away static iron core 10 when resetting for dynamic iron core 19, and can automatically fall to static iron core 10 by anti-stop iron core 19; Certain reset components also can be the combination of shell fragment or spring and shell fragment, as long as can provide restoring force, even can use small-sized cylinder when conditions permit.

As Fig. 1, shown in Figure 11, described dividing plate 17 is fixed with outer guide sleeve 12, described swing arm 13, resetting device is located in outer guide sleeve 12, described moving contact rack 5 is fixed with interior fairlead 11, described locating piece 6 is fixed in interior fairlead 11 and forms centrum 20, outer guide sleeve 12 leads to interior fairlead 11, also be that centrum 20 is led, locating piece 6 is fixed on moving contact rack 5 by interior fairlead, interior fairlead matched in clearance is in outer guide sleeve 12, a cushion block 23 can also be fixed bottom outer guide sleeve 12, swing arm 13 lower end is just fixed by this cushion block 23 and outer guide sleeve 12 and dividing plate 17, swing arm 13 lower end is Z-type fulcrum, undertaken spacing by cushion block 23 in the aperture of Z-type fulcrum insertion outer guide sleeve 12, therefore swing arm lower end can swing in outer guide sleeve 12, it is reverse arc shape that swing arm 13 there occurs strain under the effect of centrum 20, therefore the slide block 21 of swing arm 13 other end also only to swing relative to outer guide sleeve 12 under the effect of swing arm 13.

As Fig. 1, shown in Fig. 9, as a kind of execution mode that resetting device can be selected, resetting device can be back-moving spring 14, do not have magnetic to move to cause when iron core 19 moves upward not drive moving contact rack 5 to move upward at coil 18 no power of static iron core 10, now will act on a restoring force upwards by back-moving spring 14 pairs of centrums 20, slide block 21 so just can be made to put under trap C1 from trap B1 and to enter operating state, as shown in Figure 3, when slide block put under from trap C1 in trap D1 enter pre-operation state time, effect centrum 20 moves upward again by back-moving spring 14, time slide block 21 naturally slip into trap A1 from trap D1.

As shown in Figure 1, interior fairlead 11 end is connected with moving contact rack 5 by fixed head 24, and certainly, fairlead 11 also can directly be fixed on moving contact rack 5.

Operation principle of the present invention is:

As shown in Fig. 1, Fig. 5, Figure 11, when contactor is in halted state, slide block 21 is in trap A1, and dynamic iron core 19 and static iron core 10 do not have adhesive and separate, and moving contact 2 also separates with fixed contact 3; When the coil 18 of the contactor being in halted state is energized, the adhesive because of the effect of electromagnetic force of dynamic and static iron core, dynamic iron core 2 is moved downward with moving contact rack 5 and centrum 20 by suspension rod 16, and namely, fairlead 11 and locating piece 6 move downward.Slide block 21 by pind down with the swing arm 13 of its consubstantiality, and is subject to the effect of the spring force of self the reverse arc shape state perpendicular to plane ABCD, with swing arm other end Z for the center of circle, can only slide in peach-shaped work nest 22 guide rail.A portion from Figure 10, for the slide block in trap A1, the guide rail from A to B is smooth; D portion from Figure 10, from A to D, there is trap A1 in guide rail.Slide block 21 can not jump out trap, along guide rail AB, can only be held to B end motion by A.As shown in a portion in Figure 10, at B point, track AB is trap B1, and can not move upward again, and now centrum 20 has moved downward stroke ab, and back-moving spring 14 and 18, spring all be have compressed, and the reduction length of these two springs equals ab.Now, centrum 20, position between swing arm 13 and slide block 21, see Fig. 2, Fig. 6.At this moment, dynamic iron core 19 and static iron core 10 adhesive completely.Because centrum 20 and moving contact rack 5 are rigidly connected, centrum 20 has moved stroke ab (ab=ac+bc) downward vertically, has also moved downward stroke ab with moving contact rack 5.Vertical stroke ac equals moving contact 2, fixed contact 3 normal travel s, state shown in Fig. 2, Fig. 6, and not only moving contact 2, fixed contact 3 are completely closed, also makes the anti-jump spring 1 above moving contact have compressed stroke bc, bc > △ s '.Contactor state as shown in Figure 2 also can be described as " the pre-operation state " of contactor.From state shown in Fig. 1, be converted to the time compole short (< 0.1 second) of state shown in Fig. 2.Pass into electromagnet coil extremely short, the electric current of the conversion that realizes state shown in from state shown in Fig. 1 to Fig. 2, be called " closing pulse ".

Be in Fig. 2 state, namely electromagnetic contactor iron coil 18 power-off of pre-operation state, after namely " closing pulse " terminates, electromagnet loses electromagnetic attraction, and dynamic iron core 19 rises to original position under the effect of spring 18.Because dynamic iron core 19 to be spacingly connected by suspension rod 16 is unidirectional with between moving contact rack 5, dynamic iron core 19 moves downward, and also moves downward with moving contact rack 5 and centrum 20; Dynamic iron core 19 moves upward, and but can not move upward with moving contact rack 5 and centrum 20.Moving contact rack 5 and centrum 20 lose dynamic iron core 19 and draw, the centrum 20 that locating piece 6 and interior fairlead 11 form moves upward under the effect of back-moving spring 14, because there is trap B1 in slide block 21, can only slide to C point by point along track BC from B, fall into one's trap C1, see Fig. 7, centrum 20 is held by swing arm 13 and slide block 21, again can not rise.Slide block falls trap C1 from trap B1, be equivalent to centrum 20 to have moved upward vertical stroke bc, the contactor halted state of centrum 20 relative Fig. 1, only move downward stroke ac, this one stroke, just in time equal the stroke s that moving contact 2 is closed with fixed contact 3 normal reliable, dynamic and static contact reliably closes, contactor enters operating state, and anti-jump spring 1 reverts to normal condition from excess of stroke compression.Slide block 21 is a kind of stable state in trap C1, attracts, and make contactor be stabilized in operating state, see Fig. 3 and Fig. 7 without the need to electromagnet.

Shown in the in running order i.e. Fig. 3 of contactor during state, if electromagnet coil 18 is energized once again, the adhesive again of dynamic and static iron core.Moving contact rack 5 and centrum 20 move downward in company with dynamic iron core 19 once again, and slide block 21 is moved along track CD, and slide block slides to trap D1, see Fig. 4, Fig. 8 from trap C1.Now anti-jump spring 1 is crossed stroke again and be have compressed length bc.This state can be described as the pre-stop state of contactor.Attracted by electromagnet, the state shown in from the condition conversion shown in Fig. 3 to Fig. 4, required time extremely short (< 0.1 second).Pass into electromagnet coil extremely short, the electric current of the conversion that realizes state shown in from state shown in Fig. 3 to Fig. 4, be called " separating brake pulse ".

The contactor being in Fig. 4 state is namely in pre-stop state, and when electromagnet coil 8 power-off, after namely " separating brake pulse " terminates, dynamic iron core 19 loses electromagnetic attraction, under the effect of spring 18, rises to original position.Moving contact rack 5 and centrum 20 lose the suction of dynamic iron core, under the effect of back-moving spring 14, move upward.Moving contact 2 is also subject to the effect of moving contact spring 7, with fixed contact 3 quick separating.Slide block 21 slips into trap A1 along track DA from trap D1, and centrum 20 rises to extreme higher position.The state shown in Fig. 1 got back to again by contactor, namely halted state.

Like this, pass into " closing pulse " in unicoil machinery self-sustaining A.C. contactor electromagnet coil 18, it can be converted to " operating state " from halted state.Pass in same coil " separating brake pulse " again, it can be converted to halted state from " operating state " again.

Contactor is in " operating state ", once electrical breakdown, can take manual measure, moving contact is clicked downwards again, makes it to transfer state shown in Fig. 4 to, after loosing one's grip from state shown in Fig. 3, just by being in the contactor of " operating state ", halted state can be returned to.

Claims (7)

1. unicoil machinery self-sustaining A.C. contactor, it comprises shell, moving contact, fixed contact, anti-jump spring, moving contact rack, moving contact spring, dynamic iron core, static iron core and coil, is characterized in that: be provided with a dividing plate in shell, moving contact, fixed contact, anti-jump spring, moving contact rack, moving contact spring, in dividing plate side, moves iron core, static iron core and coil are at dividing plate opposite side, move and be connected by bindiny mechanism between iron core with moving contact rack, bindiny mechanism and moving contact rack are fastenedly connected, dynamic iron core and bindiny mechanism are unidirectional to be spacingly connected, dynamic iron core is provided with reset components, and this reset components is located between dynamic iron core and shell, or this reset components is located between dynamic iron core and dividing plate, move and be provided with switching mechanism between iron core and moving contact rack, switching mechanism comprises swing arm, slide block and be provided with the locating piece of peach-shaped work nest, swing arm one end is fixed on dividing plate, the other end and slide block are fixed, slide block is located in the peach-shaped work nest of locating piece, peach-shaped work nest comprises four unidirectional traps in the same way, slide block according to operating state need be located in these four different unidirectional traps, be provided with resetting device between locating piece and dividing plate.

2. unicoil machinery self-sustaining A.C. contactor according to claim 1, it is characterized in that: described bindiny mechanism comprises connecting plate, two suspension rods, connecting plate is located at the below of dynamic iron core, the two ends of connecting plate are connected with suspension rod, two suspension rods are fixedly connected with moving contact rack one end respectively, and the other end arranges nut through connecting plate by end and carries out unidirectional spacing connection.

3. unicoil machinery self-sustaining A.C. contactor according to claim 1, is characterized in that: described reset components is spring, and this spring is fixed between dynamic iron core and shell.

4. unicoil machinery self-sustaining A.C. contactor according to claim 1, it is characterized in that: described dividing plate is fixed with outer guide sleeve, described swing arm, resetting device are located in outer guide sleeve, described moving contact rack is fixed with interior fairlead, described locating piece is fixed in interior fairlead, the internal fairlead of outer guide sleeve leads, and locating piece is fixed on moving contact rack by interior fairlead.

5. the unicoil machinery self-sustaining A.C. contactor according to claim 1 to 5 any one, is characterized in that: described resetting device is back-moving spring.

6. unicoil machinery self-sustaining A.C. contactor according to claim 5, is characterized in that: described interior fairlead end is connected with moving contact rack by fixed head.

7. unicoil according to claim 1 machinery self-sustaining A.C. contactor, is characterized in that: four described unidirectional traps are for clockwise in the same way or counterclockwise in the same way.