CN214313061U

CN214313061U - Duplex relay

Info

Publication number: CN214313061U
Application number: CN202120431314.2U
Authority: CN
Inventors: 周晓峰; 贾红军; 袁天伟; 李骏
Original assignee: Ningbo Fengmei New Energy Automobile Technology Co ltd
Current assignee: Ningbo Fengmei New Energy Automotive Technology Co ltd
Priority date: 2021-02-26
Filing date: 2021-02-26
Publication date: 2021-09-28
Anticipated expiration: 2031-02-26

Abstract

The utility model discloses a pair relay, including last explosion chamber and lower coil room, go up and keep apart through a magnetic conduction flat board between explosion chamber and the lower coil room, it is equipped with first circuit static contact post, first contact piece, second circuit static contact post, second and moves contact piece and promotion dish to go up in the explosion chamber, first contact piece and second are moved to first contact piece and the second and are moved the contact piece and push the dish and be connected, it promotes first contact piece and the first circuit static contact post connection of moving to push away the driving disk, it promotes the second and moves the contact piece and is connected with second circuit static contact post to push away the driving disk, first circuit static contact post and first distance of moving between the contact piece are less than second circuit static contact post and the second and move the distance between the contact piece. The utility model discloses set up two way conduction structure, through same drive structure, guarantee earlier to switch on all the way, another way switches on again, and then can carry out a loss to the heavy current in the twinkling of an eye, and another way of rethread makes the stable work of relay.

Description

Duplex relay

Technical Field

The utility model relates to a relay field, in particular to pair relay.

Background

The high-voltage relay is widely applied to the high-voltage fields of electric vehicles, electric automobiles, photovoltaic and the like. Driven high-voltage relay all is the normally open bridge type contact structure of the same way: the two static contact columns are conducted by the action of a movable contact piece. High-voltage relay inserts to the circuit in, when the circuit just started, can produce the heavy current condition in the twinkling of an eye, can cause high-voltage relay's damage sometimes.

In order to avoid this situation, a pre-charge circuit is usually connected in parallel to two ends of the high-voltage relay to avoid the influence of the large current on the high-voltage relay, the pre-charge circuit includes the pre-charge relay and a pre-charge resistor, and the pre-charge resistor consumes the electric energy of the instantaneous large current. After the circuit is stabilized, the high-voltage relay is switched on, and then the pre-charging circuit is switched off. However, by arranging the pre-charging circuit, the pre-charging relay, the pre-charging resistor and other electrical elements need to be additionally arranged, the whole control circuit has too many control units, the space on the circuit board is increased, and the whole integration of the circuit is lower. In the prior art, a dual relay also exists, but the relay is generally formed by simultaneously connecting two lines or independently controlling the two lines to be respectively connected, so that the other line cannot be automatically connected after a period of time after one line is connected.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: the duplex relay can be connected with one line to break large current when the circuit is just started, and can be automatically connected with the other line to stably work after the circuit is stabilized.

The utility model provides a technical scheme that above-mentioned problem adopted does: the utility model provides a duplex relay, includes explosion chamber and lower coil chamber, go up and keep apart through a magnetic conduction flat board between explosion chamber and the lower coil chamber, it is equipped with first circuit static contact post, the first contact piece, second circuit static contact post, second of moving in the explosion chamber and moves the contact piece and promote the dish, first contact piece and second of moving move the contact piece and promote the dish and be connected, it promotes first contact piece and first circuit static contact post connection of moving to promote the dish, it promotes the second and moves the contact piece and be connected with second circuit static contact post to promote the dish, first circuit static contact post and first distance of moving between the contact piece are less than second circuit static contact post and second and move the distance between the contact piece.

Compared with the prior art, the utility model has the advantages of: the conduction of the two circuits is realized by arranging the first movable contact piece and the second movable contact piece, and the integration level of the relay is high; through the distance between first circuit static contact post and the first movable contact piece be less than the distance between second circuit static contact post and the second movable contact piece, combine first movable contact piece and second movable contact piece to be connected with the push disk again, guarantee that the push disk can insert first circuit earlier after promoting first movable contact piece and second movable contact piece, insert the second circuit again.

Preferably, first circuit static contact post includes first static contact post and second static contact post, second circuit static contact post includes third static contact post and fourth static contact post, it makes first static contact post and second static contact post be connected to promote the first contact piece that moves of driving disk promotion, it makes third static contact post and fourth static contact post be connected to promote the second to move the contact piece. Therefore, after the pushing disc can push the first movable contact piece and the second movable contact piece, the first circuit and the second circuit are conducted.

Preferably, the bottom end of the first movable contact piece is made of pure copper, the top end of the first movable contact piece is welded with silver tin oxide alloy, and the second movable contact piece is made of pure copper. Therefore, the first circuit realizes the conduction and the disconnection of large current through the silver tin oxide alloy, and replaces a pre-charging resistor; the second line is directly conducted through the second movable contact piece made of pure copper materials, so that the circuit is convenient to transmit current.

Preferably, the first movable contact piece is connected with the pushing disc through a first contact spring, a first guide rod is arranged in the first contact spring, one side of the first guide rod is fixed with the first movable contact piece, and the other end of the first guide rod is movably connected with the pushing disc. Like this, through setting up first contact spring, the promotion dish can make first movable contact piece and the inseparable pressfitting connection of first circuit static contact post after promoting, prevents to open circuit and causes contact failure.

Preferably, the lower coil chamber comprises a U-shaped magnetic conducting choke iron, an annular coil, a movable iron core and a push rod, wherein the annular coil is arranged in the U-shaped magnetic conducting choke iron, the movable iron core is arranged in the annular coil, one end of the push rod is connected with the movable iron core, and the other end of the push rod penetrates through the magnetic conducting flat plate to be connected with the push disc. Like this, the annular coil through lower coil chamber drives and moves the iron core motion, and then drives the push rod operation, promotes the motion of push disk again, conveniently goes up switching on and breaking off of static contact post and movable contact piece in the arc extinguishing chamber.

Preferably, an annular magnetic conduction ring is further arranged between the annular coil and the movable iron core. Therefore, the magnetic flux is increased conveniently through the annular magnetic conduction ring, and the movable iron core is driven conveniently by the annular magnetic conduction ring.

Preferably, a return spring is sleeved outside the push rod, one end of the return spring is connected with the magnetic conduction flat plate, and the other end of the return spring is connected with the movable iron core. Therefore, after the annular coil is not electrified, the movable iron core can be returned to the initial position by the elastic force through the return spring, and the effect of disconnecting the dual relay is achieved.

Drawings

Fig. 1 is a schematic diagram of a dual relay structure of the present invention;

FIG. 2 is a top view of the dual relay structure of the present invention;

FIG. 3 is a cross-sectional view of the present invention taken along line A-A of FIG. 2;

fig. 4 is a cross-sectional view of the present invention along the line B-B in fig. 2.

The reference numbers in the figures illustrate: 1. the upper arc extinguish chamber, 11, a first line static contact column, 111, a first static contact column, 112, a second static contact column, 12, a first movable contact piece, 121, a first contact spring, 122, a first guide rod, 13, a second line static contact column, 131, a third static contact column, 132, a fourth static contact column, 14, a second movable contact piece, 141, a second contact spring, 142, a second guide rod, 15, a push plate, 2, a lower coil chamber, 21, a U-shaped magnetic conduction choke, 22, an annular coil, 23, a movable iron core, 24, a push rod, 25, an annular magnetic conduction coil, 26 and a return spring.

Detailed Description

Embodiments of the present invention are further described below with reference to the accompanying drawings.

As shown in fig. 1 to 4, the present embodiment relates to a duplex relay, which includes an upper arc-extinguishing chamber 1 and a lower coil chamber 2, wherein the upper arc-extinguishing chamber 1 and the lower coil chamber 2 are isolated from each other by a magnetically conductive flat plate 3.

The upper arc extinguish chamber 1 is internally provided with a first line static contact column 11, a first movable contact piece 12, a second line static contact column 13, a second movable contact piece 14 and a push disc 15. The first movable contact piece 12 and the second movable contact piece 14 are connected to the push-on plate 15.

The pushing plate 15 pushes the first moving contact piece 12 to connect with the first line static contact column 11, and the pushing plate 15 pushes the second moving contact piece 14 to connect with the second line static contact column 13. During the actual control, the pushing disk 15 can push the first moving-contact piece 12 and the second moving-contact piece 14 at the same time.

In the present embodiment, the distance between the first line stationary contact post 11 and the first movable contact piece 12 is smaller than the distance between the second line stationary contact post 13 and the second movable contact piece 14. When the pushing disk 15 pushes and simultaneously pushes the first moving contact piece 12 and the second moving contact piece 14, the first moving contact piece 12 can be connected to the first line stationary contact post 11 first, and then the second moving contact piece 14 can be connected to the second line stationary contact post 13.

In the actual use process, the first movable contact piece 12 is connected with the first line static contact column 11 to realize the connection of the first line and pre-charge the relay; and then the second movable contact piece 14 is connected with the second line static contact column 13 to realize the connection with the second line, so that the relay can normally work, and the conduction interval time of the second movable contact piece and the second line static contact column is short. In the middle of the actual circuit, its heavy current in the twinkling of an eye also between several milliseconds to tens of milliseconds, the structure that this embodiment designed like this, the switch-on of first circuit and the switch-on of second circuit are also very short, can accord with the circuit requirement, and structures such as pre-charge resistance are inserted again to first circuit, just can realize consuming heavy current in the twinkling of an eye, prevent to cause the damage to whole relay.

The embodiment combines the pre-charging relay and the original working relay together, and improves the integration level of the circuit.

In the actual circuit, the first line stationary contact post 11 includes a first stationary contact post 111 and a second stationary contact post 112, and the second line stationary contact post 13 includes a third stationary contact post 131 and a fourth stationary contact post 132. The first movable contact piece 12 is configured to electrically connect the first stationary contact column 111 and the second stationary contact column 112 to each other, thereby electrically connecting the first line. The second movable contact piece 14 is configured to electrically connect the third stationary contact column 131 and the fourth stationary contact column 132 to each other, thereby electrically connecting the second line. Meanwhile, in the whole circuit, the first line is connected to pre-charge the relay, and then the second line is connected to normally work.

In this embodiment, the pushing plate 15 pushes the first movable contact piece 12 to connect the first stationary contact column 111 with the second stationary contact column 112, and the pushing plate 15 pushes the second movable contact piece 14 to connect the third stationary contact column 131 with the fourth stationary contact column 132.

In order to further improve the integration level of the circuit, the pre-charging resistor is also designed in the dual relay. In this embodiment, the bottom end of the first movable contact piece 12 is made of pure copper, the top end of the first movable contact piece 12 is soldered with silver tin oxide alloy, and the second movable contact piece 14 is made of pure copper. Meanwhile, silver tin oxide alloy is also welded at the bottom ends of the first static contact column 111 and the second static contact column 112, and the pre-charging resistor is replaced by the silver tin oxide alloy. The silver tin oxide alloy is arc-resistant and corrosion-resistant, and the structure is used for realizing connection and disconnection of a large-current load. However, replacing the pre-charge resistor with silver oxide alloy is not good for the circuit to transmit current, and its own resistance is large, which causes the two contact surfaces to generate heat. Therefore, a contact material of pure copper is required to realize the electric power transmission. Therefore, the second movable contact piece 14 is made of pure copper.

In this embodiment, promote first movable contact piece 12 and second movable contact piece 14 simultaneously through promoting the dish, first movable contact piece 12 is earlier with first static contact post 111 and second static contact post 112 connection switch on, the silver tin oxide alloy on the contact surface through first movable contact piece 12 and both comes to earlier consume the heavy current that produces the switching on in the twinkling of an eye of circuit, the rethread second movable contact piece 14 is with third static contact post 131 and fourth static contact post 132 turn-on connection, realize the normal work of relay, avoid the damage of heavy current to the relay. Finally, the external connecting wires of the first fixed contact column 111 and the second fixed contact column 112 of the relay are cut off, and the third fixed contact column 131 and the fourth fixed contact column 132 are connected in a conduction mode to enable the relay to work normally.

As shown in fig. 3-4, the first movable contact piece 12 is connected to the pushing plate 15 through a first contact spring 121, a first guide rod 122 is disposed in the first contact spring 121, one end of the first guide rod 122 is fixed to the first movable contact piece 12, and the other end is movably connected to the pushing plate 15. By arranging the first contact spring 121, after the pushing disc 15 is pushed, the first movable contact piece 12 and the first line static contact column 11 can be tightly connected in a pressing manner, so that poor contact caused by open circuit is prevented; meanwhile, the elastic force of the first contact spring 121 allows the first movable contact piece 12 to approach the push plate 15, ensuring that the second movable contact piece 12 can be connected to the second line stationary contact post 13.

Similarly, to ensure that the second movable contact piece 12 can be tightly connected with the second line stationary contact column. The second movable contact piece 14 is connected to the pushing plate 15 through a second contact spring 141, a second guide bar 142 is disposed in the second contact spring 141, one end of the second guide bar 142 is fixed to the second movable contact piece 14, and the other end is movably connected to the pushing plate 15.

In this embodiment, the lower coil chamber 2 includes a U-shaped magnetic yoke 21, an annular coil 22, a movable iron core 23 and a push rod 24, the annular coil 22 is disposed in the U-shaped magnetic yoke 21, the movable iron core 23 is disposed in the annular coil 22, one end of the push rod 24 is connected to the movable iron core 23, and the other end of the push rod 24 penetrates through the magnetic conduction flat plate 3 and is connected to the push disk 15. The annular coil of coil chamber drives through the lower coil and moves the iron core motion, and then drives the push rod operation, promotes the motion of push disk again, conveniently goes up switching on and breaking off of static contact post and moving contact piece in the arc extinguishing chamber.

An annular magnetic conductive ring 25 is also arranged between the annular coil 22 and the movable iron core 23. Through the annular magnetic conduction ring, the magnetic flux is increased conveniently, and the movable iron core is driven by the annular coil conveniently.

The push rod 24 is sleeved with a return spring 26, one end of the return spring 26 is connected with the magnetic conduction flat plate 3, and the other end is connected with the movable iron core 23. After the annular coil is not electrified, the movable iron core can be returned to the initial position by the elastic force through the return spring, and the effect of disconnecting the duplex relay is further achieved.

The utility model has the advantages that: the conduction of the two circuits is realized by arranging the first movable contact piece and the second movable contact piece, and the integration level of the relay is high; through the distance between first circuit static contact post and the first movable contact piece be less than the distance between second circuit static contact post and the second movable contact piece, combine first movable contact piece and second movable contact piece to be connected with the push disk again, guarantee that the push disk can insert first circuit earlier after promoting first movable contact piece and second movable contact piece, insert the second circuit again.

While the foregoing description shows and describes several preferred embodiments of the invention, it is to be understood, as noted above, that the invention is not limited to the forms disclosed herein, but is not intended to be exhaustive or to exclude other embodiments and may be used in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. But that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention, which is to be limited only by the claims appended hereto.

Claims

1. The utility model provides a pair relay, includes last explosion chamber (1) and lower coil room (2), go up and keep apart its characterized in that through a magnetic conduction flat board (3) between explosion chamber (1) and lower coil room (2): go up to be equipped with first circuit static contact post (11), first move contact piece (12), second circuit static contact post (13), second and move contact piece (14) and push away driving disk (15) in explosion chamber (1), first move contact piece (12) and second and move contact piece (14) and be connected with push away driving disk (15), push away driving disk (15) and promote first move contact piece (12) and be connected with first circuit static contact post (11), push away driving disk (15) and promote the second and move contact piece (14) and be connected with second circuit static contact post (13), first circuit static contact post (11) and first distance of moving between contact piece (12) are less than second circuit static contact post (13) and the second and move the distance between contact piece (14).

2. A duplex relay according to claim 1, wherein: first circuit static contact post (11) are including first static contact post (111) and second static contact post (112), second circuit static contact post (13) are including third static contact post (131) and fourth static contact post (132), it makes first static contact post (111) be connected with second static contact post (112) to promote driving disk (15) to promote first moving contact piece (12), it makes third static contact post (131) be connected with fourth static contact post (132) to promote driving disk (15) to promote the second and move contact piece (14).

3. A dual relay as claimed in claim 2, wherein: the bottom end of the first movable contact piece (12) is made of pure copper, the top end of the first movable contact piece (12) is welded with silver tin oxide alloy, and the second movable contact piece (14) is made of pure copper.

4. A dual relay according to any one of claims 1-3, wherein: the first movable contact piece (12) is connected with the pushing disc (15) through a first contact spring (121), a first guide rod (122) is arranged in the first contact spring (121), one end of the first guide rod (122) is fixed with the first movable contact piece (12), and the other end of the first guide rod is movably connected with the pushing disc (15).

5. The dual relay of claim 4, wherein: lower coil room (2) include U type magnetic conduction choke (21), loop coil (22), move iron core (23) and push rod (24), loop coil (22) set up in U type magnetic conduction choke (21), move iron core (23) and set up in loop coil (22), push rod (24) one end with move iron core (23) and be connected, the other end runs through magnetic conduction flat board (3) and is connected with push disk (15).

6. A dual relay according to claim 5, wherein: an annular magnetic conduction ring (25) is further arranged between the annular coil (22) and the movable iron core (23).

7. A dual relay according to claim 5, wherein: and a return spring (26) is sleeved outside the push rod (24), one end of the return spring (26) is connected with the magnetic conduction flat plate (3), and the other end of the return spring is connected with the movable iron core (23).