CN204303694U - A kind of mechanical self-latching type contactor - Google Patents

Abstract

The utility model relates to the technical field of self-locking contactors, in particular to a mechanical self-locking contactor. The self-locking unit consists of a positioning guide rail fixed on a magnetic pole base, a return spring and a positioning slider on a core rod. And the design of the guide slider installed on the iron core, so that in the process of connecting and releasing the product, only the switching pulse voltage and the releasing pulse voltage are applied at both ends of the coil to complete the working state transition of the product, which is different from the current Compared with the mechanical self-locking contactor, the magnetic holding contactor does not need to change the polarity of the coil voltage, nor does it need to use the release auxiliary coil, which simplifies the control circuit mode of the product, simplifies the product structure, and reduces the cost of the product .

Description

A mechanical self-locking contactor

technical field

The utility model relates to the technical field of self-locking contactors, in particular to a mechanical self-locking contactor.

Background technique

At present, there are mainly two types of self-locking contactors to maintain the closed and open states of the contacts. One is the magnetic holding contactor that uses permanent magnets to provide the holding force. Due to its structural characteristics, the coil does not It needs to be energized. When the state of the contact needs to be changed, it is only necessary to apply a pulsed DC voltage to the coil. The conversion of the contact on or off is completed by changing the positive and negative polarities of the voltage at both ends of the coil. This driving method is When applying this kind of self-locking products, it is necessary to add a conversion circuit in the peripheral control circuit; another form is to use a special mechanical structure to generate a mechanical self-locking contactor, which is generally attached to the contactor. A locking device consists of a movable pin and an auxiliary coil. When the contactor is energized and the movable core moves to the closed position, the movable pin locks the movable core under the action of the locking spring, thereby achieving the purpose of locking the movable core , so that the movable contact of the contactor remains closed; when the contactor needs to be disconnected, a voltage needs to be applied to the auxiliary coil of the locking device to make the movable pin return, thereby releasing the movable core of the contactor and driving the movable contact of the contactor to return , to complete the process of breaking the contactor.

The above-mentioned contactors in the prior art are generally only suitable for the operation of a kind of AC or DC power supply; for example, the document "DC Contactor" with the patent number CN201420198874 discloses a contactor suitable for DC power supply; another example is the patent No. The document CN201010122292 "Contactor with Mechanical Short-Circuit Self-Locking Function" discloses a contactor suitable for AC power; The self-locking device with self-locking function uses an external locking device and an additional coil to complete the working principle of the entire contactor.

It can be seen that the contactor and the contactor self-locking device in the prior art need to increase the auxiliary polarity conversion control circuit, and the auxiliary coil and the conversion circuit should be added to complete the connection and disconnection of the contactor; this makes the self-locking function The control circuit of the contactor is complicated, the structure of the device is complicated, the manufacturing process is complicated, the cost is high, the universality of AC and DC is poor, and the energy consumption is relatively large.

Utility model content

In order to solve the above-mentioned technical problems existing in the prior art, the utility model provides a mechanical self-locking contactor, which does not need to change the polarity of the coil voltage, and does not need to use a release auxiliary coil, which simplifies the control circuit of the product. The product structure is simplified and the cost of the product is reduced.

Specifically, it is achieved through the following technical solutions:

A mechanical self-locking contactor, which is composed of a contact unit, an electromagnet unit, a self-locking unit, an outer cover and a cover plate, the contact unit is arranged above the electromagnet unit, and the self-locking unit is arranged in the inner cavity of the electromagnet unit There are outer covers inside and outside, the bottom of the outer cover is provided with a cover plate, the top of the outer cover is provided with a seat plate, and an arc extinguishing grid is arranged inside the contact unit close to the outer cover, and the self-locking unit is fixed by It consists of a positioning guide rail on the magnetic pole seat, a return spring and a positioning slider arranged on the core rod, and a guiding slider installed on the iron core.

The positioning slider is inserted into the guide slider, and then the positioning slider and the guide slider are installed together in the positioning guide rail.

The positioning slider is provided with a long guide rail.

The lower end surface of the long guide rail is an inclined plane.

The upper end surface of the guide slider is provided with a sawtooth slope.

The guide slider is provided with a short guide rail close to the upper end surface.

The positioning guide rail is a cylindrical sleeve, and a guide groove and a positioning boss are arranged on the inner surface near the lower end surface.

The upper end surface of the positioning boss is a toothed inclined surface, and can be matched with the lower end surface of the long guide rail (26).

The contact unit is composed of washer c, washer b, a movable contact piece arranged in the groove formed by washer c and washer b, an adjusting washer arranged on washer b, a contact spring arranged at the lower end of washer c, The contact unit is composed of a support washer arranged at the lower end of the contact spring, and the contact unit is composed of a limit clip spring arranged on the adjustment washer, a washer a arranged at the upper end of the limit clip spring, a core rod arranged at the center of the washer a and a The return spring on the core rod is connected with the housing.

The electromagnet unit is composed of a coil, an iron yoke arranged on the periphery of the coil, a flange connected to the bottom end of the iron yoke and the bottom end of the coil, a lower partition arranged between the iron yoke and the contact unit, and a lower partition arranged on the lower The backing plate between the partition and the iron yoke, the core rod penetrating the center of the contact unit, the iron core arranged between the guide slider and the coil, the return spring arranged between the iron core and the guide slider, and the The return spring consists of a pole holder at the top of the spring.

The mechanical self-locking contactor of the utility model can be applied to DC voltage contactors, and can also be applied to AC voltage contactors.

Compared with the prior art, the technical effect of the utility model is reflected in:

Through the design of the self-locking unit, which is composed of the positioning guide rail fixed on the magnetic pole seat, the return spring and the positioning slider installed on the core rod, and the guide slider installed on the iron core, the product is connected and released. It only needs to apply the switch-on pulse voltage and the release pulse voltage at both ends of the coil to complete the switching of the working state of the product. Compared with the existing magnetic holding contactor and mechanical self-locking contactor, there is no need to change the polarity of the coil voltage. There is also no need to use the release auxiliary coil, thereby simplifying the control circuit mode of the product, simplifying the product structure, and reducing the cost of the product.

This utility model adds a mechanical self-locking component to the ordinary electromagnetic contactor. When a working pulse voltage is applied to the contactor coil, its contacts are closed and drives the mechanical self-locking component to move, changing the state of the mechanical self-locking component and completing Its self-locking function keeps the contact closed state unchanged. When the contactor needs to be disconnected, a pulse voltage is applied to its coil, and the mechanical self-locking component automatically switches its working state to the released state, thereby driving the contactor contact to disconnect and completing the contact state conversion. It can be seen that the mechanical self-locking contactor can complete the self-locking and release state transition of the contactor without the auxiliary coil, and its structure is simple, which reduces the cost; and after the contactor works, the coil does not need to apply any voltage, so as to achieve The purpose of energy saving.

Description of drawings

Fig. 1 is a structural schematic diagram of a mechanical self-locking contactor of the present invention.

Fig. 2 is an enlarged structural schematic diagram of the mechanical self-locking contactor of the present invention at A in Fig. 1 .

1-cover plate 2-flange plate 3-iron yoke 4-lower partition 5-backing plate 6-arc extinguishing grid 7-moving contact piece 8-core rod 9-outer cover 10-seat plate 11-return spring 12- Washer a 13-Limiting circlip 14-Adjusting washer 15-Washer b 16-Washer c 17-Contact spring 18-Support washer 19-Coil 20-Pole seat 21-Positioning slider 22-Positioning rail 23-Guide Slider 24-iron core 25-return spring 26-long guide rail 27-guide groove 28-short guide rail 29-serrated bevel 30-positioning boss.

Detailed ways

The technical solutions of the present utility model are further limited below in conjunction with the accompanying drawings and specific embodiments, but the scope of protection is not limited to the descriptions made.

Example

As shown in Figure 1, a mechanical self-locking contactor is composed of a contact unit, an electromagnet unit, a self-locking unit, an outer cover 9 and a cover plate 1, the contact unit is arranged above the electromagnet unit, and the self-locking unit It is arranged in the inner cavity of the electromagnet unit, and an outer cover 9 is arranged on the outside. The bottom end of the outer cover 9 is provided with a cover plate 1, and the top end of the outer cover 9 is provided with a seat plate 10. The arc extinguishing grid 6, the self-locking unit is composed of a positioning guide rail 22 fixedly arranged on the magnetic pole seat 20, a return spring 11 arranged on the core rod 8, a positioning slider 21 and a guide slider installed on the iron core 24. Block 23 composition.

With the mechanical self-locking contactor with the above structure, when the contact of the product needs to be switched, it only needs to apply a voltage with a certain pulse width to the coil to complete it. Compared with the existing self-locking contactor, the coil voltage polarity conversion circuit and the self-locking auxiliary coil are omitted, the control mode of the product is simplified, and the material cost is reduced. At the same time, since the product is kept in the contact state by the self-locking device after it is switched on, the coil does not need to apply any voltage, which also achieves the effect of energy saving.

For the self-locking contactor with the above structure, its main contact can be normally open, normally closed, or transfer type, and the main contact can also be equipped with an auxiliary contact.

Further, in order to perform better operation and improve the operating performance of the self-locking energy-saving contactor, the positioning slider 21 is inserted into the guide slider 23, and then the positioning slider 21 and the guide slider 23 are Installed in the positioning guide rail 22 together.

As shown in FIG. 2 , the positioning slider 21 is provided with a long guide rail 26 .

The lower end surface of the long guide rail 26 is a slope.

The upper end surface of the guide slider 23 is provided with a sawtooth slope 29 .

The guide slider 23 is provided with a short guide rail 28 close to the upper end surface.

The positioning guide rail 22 is a cylindrical sleeve, and a guide groove 27 and a positioning boss 30 are arranged on the inner surface near the lower end surface.

The upper end surface of the positioning boss 30 is a toothed inclined surface, and can be matched with the lower end surface of the long guide rail (26).

The contact unit is composed of the washer c16, the washer b15, the movable contact piece 7 arranged in the groove formed by the washer c16 and the washer b15, the adjusting washer 14 arranged on the washer b15, the contact arranged at the lower end of the washer c16 The spring 17 is composed of a support washer 18 arranged at the lower end of the contact spring 17, and the contact unit is composed of a limit ring 13 arranged on the adjusting washer 14, a washer a12 arranged at the upper end of the limit ring 13, and a washer a12 arranged on the washer The core rod 8 at the center of a12 and the return spring 11 arranged on the core rod 8 are connected with the housing.

The electromagnet unit consists of a coil 19, an iron yoke 3 arranged on the periphery of the coil 19, a flange 2 connected to the bottom end of the iron yoke 3 and the bottom end of the coil 19, and is arranged between the iron yoke 3 and the contact unit. The lower partition 4, the backing plate 5 arranged between the lower partition 4 and the iron yoke 3, the core rod 8 penetrating the center of the contact unit, the iron core 24 arranged between the guide slider 23 and the coil 19, the setting The return spring 25 between the iron core 24 and the guide slider 23 and the magnetic pole seat 20 arranged at the top of the return spring 25 are composed.

The specific working principle is:

When the product needs to be switched on, a pulse voltage is connected at both ends of the coil 19 of the product, and the iron core 24 moves toward the direction of the pole seat 20 under the action of the electromagnetic field generated by the coil 19, and drives the guide slider 23 to move upward until it meets the pole seat 20. Suction. At the same time, the positioning slider 21 is pushed by the guide slider 23, moves upward along the guide groove 27 in the positioning guide rail 22, and pushes the core rod 8 and the moving contact piece 7 to move upward together until the contact is closed and continues to move upward for a certain stroke. Make the product contacts generate a certain contact pressure. When the guide slider 23 pushes the positioning slider 21 to move upward together, the upper half of the sawtooth slope 29 on the upper end surface of the guide slider 23 pushes the lower end surface slope of the long guide rail 26 of the positioning slider 21 to move upward together. Yes, due to the limitation of the guide groove of the positioning guide rail 22, the guide slider 23 and the positioning slider 21 can only slide upward in the guide groove of the positioning guide rail 22. After advancing to a certain distance, since the upper part of the positioning guide rail 22 does not have a guide groove 27 to limit the position, when the positioning slider 21 slides to this position, its long guide rail 26 breaks away from the limit of the guide groove 27, and the guide slide Under the promotion of the sawtooth slope at the upper end of the block 23, a certain angle of rotation is generated, and then the tooth tip of the lower end surface of the long guide rail 26 rotates and slides to the bottom of the sawtooth slope on the upper end surface of the guide slider 23, and is limited and does not rotate. The slider 23 continues to move upward together until the iron core 24 and the magnetic pole seat 20 are closed. At this time, the pulse voltage applied to the product coil ends, the coil loses its magnetic field, and the iron core 24 will return to its original position under the action of the return spring 25 . And the positioning slider 21, the guide slider 23, the core rod 8 and the movable contact piece 7 are pushed down and returned to a short stroke under the joint action of the back-moving spring 11 and the contact spring 17 until the long guide rail of the positioning slider 21 The lower end surface of 26 is in contact with the upper end surface of the positioning boss 30 of the positioning guide rail 22 and enters into the bottom of the tooth surface under the guidance of its toothed inclined surface to be limited. Like this, positioning slide block 21 and core rod 8 are just locked by positioning, do not continue to move downward. And moving contact piece 7 is owing to the compression of contact spring 17, has certain standby stroke and continues to keep its closed state unchanged. So far, the pull-in process of product contact closure has been completed and the product status has been kept unchanged. Until the product coil is connected to the pulse voltage again, the product is released.

When the product needs to be released, a pulse voltage is also applied to both ends of the product coil, which is basically the same as the process of switching on. The iron core 24 moves towards the magnetic pole seat 20 under the action of the electromagnetic field generated by the coil assembly 19, driving the guide slider. 23 moves upwards until it engages with the magnetic pole seat 20. After traveling upward to a certain distance, the sawtooth slope on the upper end surface of the guide slider 23 contacts the lower end surface of the guide rail boss of the positioning slider 21, and starts to push the positioning slider 21 away from the bottom end of the tooth surface of the positioning boss of the positioning guide rail 22. And rotate upwards along the leading sawtooth slope. When moving to the top of the positioning boss serrated tooth surface of the positioning guide rail 22, the guiding boss of the positioning slider 21 breaks away from the constraint of the positioning guide rail 22 positioning tooth surface. Under the action of force, it starts to rotate along the sawtooth slope at the upper end of the guide slider 23 and slides into the guide groove of the positioning guide rail 22 . After the release pulse voltage applied to the product coil ends, the coil loses its magnetic field, and the iron core 24 will return to its original position under the action of the return spring. The positioning slider 21, under the action of the return spring 11, will move down along the guide groove of the positioning guide rail 22 together with the guide slider 23, the core rod 8 and the moving contact piece assembly 7 and return to the original position, and the product contact is broken. Open, and complete the whole process of product release.

In the process of connecting and releasing, the product of the utility model only needs to apply the connecting pulse voltage and the releasing pulse voltage at both ends of the coil to complete the working state conversion of the product, which is different from the existing magnetic holding contactor and mechanical self-locking contactor. In comparison, the polarity of the coil voltage does not need to be changed, and the release auxiliary coil does not need to be used, thereby simplifying the control circuit mode of the product, simplifying the product structure, and reducing the cost of the product.

The mechanical self-locking contactor of the utility model can be used not only for DC voltage contactors, but also for AC voltage contactors.

The above description is only a detailed elaboration and illustration of the operating principle and specific structural connections of the utility model, and is not a further limitation to the technical solution of the utility model.

Claims (10)

1. a mechanical self-latching type contactor, by contact point unit, electromagnet unit, from lock unit, outer cover (9) and cover plate (1) composition, contact point unit is arranged on the top of electromagnet unit, be arranged in electromagnet unit internal cavities from lock unit, outer setting has outer cover (9), the bottom of outer cover (9) is provided with cover plate (1), the top of outer cover (9) is provided with seat board (10), and be close on outer cover (9) in contact point unit inside and be provided with arc extinguishing grid pieces (6), it is characterized in that, described from lock unit by the positioning guide rail (22) be fixedly installed on magnetic pole seat (20), guide slides (23) composition being arranged on back-moving spring (11) on core bar (8) and positioning sliding block (21) and being arranged on iron core (24).

2. mechanical self-latching type contactor as claimed in claim 1, it is characterized in that, described positioning sliding block (21) inserts in guide slides (23), and positioning sliding block (21) and guide slides (23) is arranged on together in positioning guide rail (22) again.

3. mechanical self-latching type contactor as claimed in claim 1 or 2, is characterized in that, described positioning sliding block (21) is provided with long guideway (26).

4. mechanical self-latching type contactor as claimed in claim 3, it is characterized in that, the lower surface of described long guideway (26) is inclined-plane.

5. mechanical self-latching type contactor as claimed in claim 1, it is characterized in that, the upper surface of described guide slides (23) is provided with sawtooth inclined-plane (29).

6. mechanical self-latching type contactor as claimed in claim 1, is characterized in that, described guide slides (23) is provided with short lead rail (28) near upper surface.

7. mechanical self-latching type contactor as claimed in claim 1, it is characterized in that, described positioning guide rail (22) is cylindrical sleeve, and its inner close lower surface is provided with guiding groove (27) and positioning boss (30).

8. mechanical self-latching type contactor as claimed in claim 7, it is characterized in that, the upper surface of described positioning boss (30) is the inclined-plane with dentation, and can match with the lower surface of long guideway (26).

9. mechanical self-latching type contactor as claimed in claim 1, it is characterized in that, described contact point unit is by packing ring c (16), packing ring b (15), be arranged on the moving contacting plate (7) in the groove that packing ring c (16) and packing ring b (15) formed, be arranged on the adjustment pad (14) on packing ring b (15), be arranged on the touch spring (17) of packing ring c (16) lower end, be arranged on supporting bead (18) composition of touch spring (17) lower end, contact point unit by being arranged on the spacing jump ring (13) regulated on pad (14), be arranged on the packing ring a (12) of spacing jump ring (13) upper end, the core bar (8) being arranged on packing ring a (12) center is connected with housing with the back-moving spring (11) be arranged on core bar (8).

10. mechanical self-latching type contactor as claimed in claim 1, it is characterized in that, described electromagnet unit is by coil (19), be arranged on the iron yoke (3) that coil (19) is peripheral, the ring flange (2) be connected with coil (19) bottom with iron yoke (3) bottom, be arranged on the lower clapboard (4) between iron yoke (3) and contact point unit, be arranged on the backing plate (5) between lower clapboard (4) and iron yoke (3), penetrate the core bar (8) at contact point unit center, be arranged on the iron core (24) between guide slides (23) and coil (19), the magnetic pole seat (20) being arranged on the return spring (25) between iron core (24) and guide slides (23) and being arranged on return spring (25) top forms.