CN220753326U - Magnetic latching relay capable of effectively extinguishing arc - Google Patents

Abstract

The utility model discloses an effective arc-extinguishing magnetic latching relay, which relates to the field of switches, and comprises a direct-acting magnetic latching driving device arranged on a base; an upper cover fixedly connected with the base; a bridge type double-break contact structure mounted in the base; an iron core in the direct-acting magnetic latching driving device is linked with a movable contact in the bridge type double-break contact structure through a pushing card; the relay is also provided with a yoke, and compared with the prior art, the relay has the beneficial effects that: the utility model uses the principle of magnetic blow to be applied to the magnetic latching relay, reduces the arc-pulling degree, reduces contact ablation and thereby prolongs the service life of the magnetic latching relay; the permanent magnet steel is placed in the upper cover square frame and corresponds to the position right above the dynamic contact and the static contact, so that the permanent magnet steel placement method is simple, the small space is fully utilized to place the permanent magnet steel, and meanwhile, the influence of the magnetic field of the magnet steel on the relay can be avoided.

Description

Magnetic latching relay capable of effectively extinguishing arc

Technical Field

The utility model relates to the field of switches, in particular to a magnetic latching relay capable of effectively extinguishing arc.

Background

The magnetic latching relay is a novel relay developed in recent years and is also an automatic switch. Like other electromagnetic relays, the electromagnetic relay has the function of automatically switching on and off the circuit. The magnetic latching relay is characterized in that the normally closed or normally open state of the magnetic latching relay is completely dependent on the action of permanent magnet steel, and the switching state is switched by triggering a pulse electric signal with a certain width. The magnetic latching relay is kept in the contact open and close state by the magnetic force generated by the permanent magnet at ordinary times. When the contact of the relay needs to be opened or closed, the relay can complete the switching of the opened and closed states instantaneously by exciting the coil with the forward (reverse) DC pulse voltage. When the contacts are in a closed state, the coil does not need to be electrified continuously, and the state of the relay can be kept unchanged only by the magnetic force of the permanent magnet.

Existing magnetic latching relays reduce arcing by increasing the inter-contact spacing. Because the distance between the contacts is increased, other performance parameters of the relay are sacrificed or the travel of the large magnet assembly is required to be improved.

Disclosure of Invention

The utility model aims to provide a magnetic latching relay capable of effectively extinguishing arc so as to solve the problems in the background technology.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

a magnetically held relay for efficient arc extinction, comprising: a direct-acting magnetic latching drive mounted on the base; an upper cover fixedly connected with the base; a bridge type double-break contact structure mounted in the base; an iron core in the direct-acting magnetic latching driving device is linked with a movable contact in the bridge type double-break contact structure through a pushing card; the relay is also provided with a yoke, and the yoke, the coil framework and the armature form a box body to be coated outside the direct-acting magnetic latching driving device.

As still further aspects of the utility model: the direct-acting magnetic latching driving device comprises a coil framework, an electromagnetic coil, a permanent magnet, an iron core and a pushing column, wherein the electromagnetic coil is arranged on the coil framework, the iron core is arranged at a shaft hole of the coil framework to form a moving pair with the coil framework, the permanent magnet is arranged on the coil framework and positioned in the middle of the electromagnetic coil, and one end of the iron core is fixedly connected with the pushing column through injection molding.

As still further aspects of the utility model: the electromagnetic coil is formed by connecting two sections of identical coils in series.

As still further aspects of the utility model: the bridge type double-break contact structure comprises a moving plate, a moving contact, a contact spring, a first static plate, a second static plate and a static contact, wherein a pushing card is connected with a pushing column, the moving plate is fixed in the pushing card through the contact spring, the moving contact is riveted on the moving plate in a pair, the first static plate and the second static plate are fixed in a clamping groove of a base, and the static contact is riveted on the first static plate and the second static plate.

As still further aspects of the utility model: the movable plate is provided with a positioning groove which is fixed on the pushing card and limits the radial movement of the movable plate.

As still further aspects of the utility model: the permanent magnet steel is fixed in the upper cover frame and above the movable contact and the stationary contact.

Compared with the prior art, the utility model has the beneficial effects that: the utility model uses the principle of magnetic blow to be applied to the magnetic latching relay, reduces the arc-pulling degree, reduces contact ablation and thereby prolongs the service life of the magnetic latching relay; the permanent magnet steel is placed in the upper cover square frame and corresponds to the position right above the dynamic contact and the static contact, so that the permanent magnet steel placement method is simple, the small space is fully utilized to place the permanent magnet steel, and meanwhile, the influence of the magnetic field of the magnet steel on the relay can be avoided.

Drawings

Fig. 1 is a schematic structural diagram of a magnetic latching relay for efficient arc extinction.

Fig. 2 is a front view of a magnetic latching relay that is effective for quenching.

Fig. 3 is a schematic position diagram of the arc extinguishing magnet steel.

Fig. 4 is a schematic diagram of magnetic arc discharge.

In the figure: the permanent magnet type magnetic force sensor comprises a 1-base, a 2-permanent magnet, a 3-yoke, 4-coil pins, a 5-coil framework, a 6-electromagnetic coil, a 7-armature, an 8-first static piece, a 9-iron core, a 10-pushing column, an 11-pushing card, a 12-static contact, a 13-upper cover, a 14-moving piece, a 15-moving contact, a 16-second static piece, a 17-contact spring and 18-permanent magnetic steel.

Detailed Description

The technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, but not all embodiments, and all other embodiments obtained by those skilled in the art without making creative efforts based on the embodiments of the present utility model are included in the protection scope of the present utility model.

Referring to fig. 1 to 4, a magnetic latching relay for efficient arc extinction, comprising: a direct-acting magnetic latching drive mounted on the base 1; an upper cover 13 fixedly connected with the base 1; a bridge type double break contact structure installed in the base 1; the iron core 9 in the direct-acting magnetic latching driving device is linked with the movable contact 15 in the bridge type double-break contact structure through the pushing card 11; the relay is also provided with a yoke iron 3, and the yoke iron 3, a coil framework 5 and an armature iron 7 form a box body to be coated outside the direct-acting magnetic latching driving device.

In this embodiment: referring to fig. 1 to 4, the direct-acting magnetic latching driving device includes a coil bobbin 5, an electromagnetic coil 6, a permanent magnet 2, an iron core 9 and a pushing post 10, wherein the electromagnetic coil 6 is mounted on the coil bobbin 5, the iron core 9 is mounted at a shaft hole of the coil bobbin 5 to form a moving pair with the coil bobbin 5, the permanent magnet 2 is disposed at the middle part of the electromagnetic coil 6 on the coil bobbin 5, and one end of the iron core 9 is connected and fixed with the pushing post 10 by injection molding.

In this embodiment: referring to fig. 1 to 4, the electromagnetic coil 6 is formed by connecting two identical coils in series.

In this embodiment: referring to fig. 1 to 4, the bridge type double-break contact structure includes a moving plate 14, a moving contact 15, a contact spring 17, a first static plate 8, a second static plate 16 and a static contact 12, a push card 11 is connected with a push column 10, the moving plate 14 is clamped in the push card 11 to fix the moving plate 14 through the contact spring 17, the moving contact 12 is riveted on the moving plate 14 in a pair, the first static plate 8 and the second static plate 16 are fixed in a clamping groove of the base 1, and the static contact 12 is riveted on the first static plate 8 and the second static plate 16.

The contact spring 17 on the push card 11 acts in addition to the fixed rotor 14; the contact spring 17, which is in a closed state with the first static plate 8 and the second static plate 16 after the pulse driving, of the moving plate 14 also generates contact pressure, so that the movable contact 15 is firmly contacted with the static contact 12.

In this embodiment: referring to fig. 1 to 4, the moving plate 14 is provided with a positioning slot fixed on the push card 11.

For limiting the radial movement of the rotor 14.

In this embodiment: referring to fig. 1 to 4, permanent magnet steel 18 is fixed in the frame of upper cover 13 above movable contact 15 and stationary contact 12.

The working principle of the utility model is as follows: magnets are arranged around the contacts (the stationary contact 12 and the movable contact 15), and the arc is lengthened and cooled by the electromagnetic force under the action of the magnetic field generated by the magnets, so that the arc is extinguished rapidly.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims (6)

1. A magnetically held relay for efficient arc extinction, comprising: a direct-acting magnetic latching drive mounted on the base; an upper cover fixedly connected with the base; a bridge type double-break contact structure mounted in the base; an iron core in the direct-acting magnetic latching driving device is linked with a movable contact in the bridge type double-break contact structure through a pushing card; the method is characterized in that: the relay is also provided with a yoke, and the yoke, the coil framework and the armature form a box body to be coated outside the direct-acting magnetic latching driving device.

2. The magnetic latching relay for efficient arc extinction according to claim 1, wherein the direct-acting magnetic latching driving device comprises a coil frame, an electromagnetic coil, a permanent magnet, an iron core and a pushing post, the electromagnetic coil is mounted on the coil frame, the iron core is mounted at a shaft hole of the coil frame to form a moving pair with the coil frame, the permanent magnet is arranged on the coil frame and positioned in the middle of the electromagnetic coil, and one end of the iron core is fixedly connected with the pushing post through injection molding.

3. The magnetically held relay for efficient quenching as claimed in claim 2, wherein the electromagnetic coil is formed by two identical coils connected in series.

4. The magnetic latching relay of claim 1, wherein the bridge double break contact structure comprises a moving plate, a moving contact, a contact spring, a first stationary plate, a second stationary plate and a stationary contact, wherein the push card is connected with the push post, the moving plate is clamped in the push card to fix the moving plate through the contact spring, the moving contact is riveted on the moving plate in a pair, the first stationary plate and the second stationary plate are fixed in a clamping groove of the base, and the stationary contact is riveted on the first stationary plate and the second stationary plate.

5. The magnetically held relay for efficient arc extinction according to claim 4, wherein the moving plate is provided with a positioning slot fixed to the pusher card for restricting radial movement of the moving plate.

6. The magnetically held relay of claim 1 wherein the permanent magnet steel is secured within the upper cover frame above the movable and stationary contacts.