CN217361465U

CN217361465U - Direct current relay with magnetic quenching function

Info

Publication number: CN217361465U
Application number: CN202122821742.9U
Authority: CN
Inventors: 钟叔明; 郑增光; 李方能
Original assignee: Xiamen Hongfa Electric Power Controls Co Ltd
Current assignee: Xiamen Hongfa Electric Power Controls Co Ltd
Priority date: 2021-11-17
Filing date: 2021-11-17
Publication date: 2022-09-02
Anticipated expiration: 2031-11-17

Abstract

The utility model discloses a direct current relay with magnetic blow-out arc extinguishing function, which comprises a housin, magnetic circuit mechanism, actuating mechanism and contact mechanism, the casing includes base and upper cover, magnetic circuit mechanism, actuating mechanism and contact mechanism dress are on the base, contact mechanism includes stationary reed and the movable contact who corresponds with it, stationary contact has been linked firmly on the stationary reed, the movable contact has been linked firmly on the movable contact, the magnetic force that produces through magnetic circuit mechanism makes actuating mechanism move, actuating mechanism drives the movable contact action and makes movable contact and stationary contact engage or break away from mutually, be equipped with the recess on the upper cover up end on stationary contact and movable contact next door, the recess comprises upper cover up end and outside extension round bounding wall, the recess is embedded to have the magnet steel, the magnetic pole direction of magnet steel is mutually perpendicular with the current direction when movable contact and stationary contact. The utility model discloses under the volume that does not enlarge the direct current relay body and do not change the prerequisite of original direct current relay structural configuration, have the magnetic blow-out arc function, prolonged the life-span of relay.

Description

Direct current relay with magnetic quenching function

Technical Field

The utility model belongs to the technical field of direct current relay makes technical field and specifically relates to a direct current relay with magnetic blow-out arc extinguishing function.

Background

When the current and the voltage reach certain values, the contact of the relay is easy to generate electric arcs when in action, the electric arcs have heat effect, the contact is easy to ablate and bond, the service life of the relay can be shortened, and in the process of generating the electric arcs, electromagnetic radiation can be carried out to the outside, and interference can be generated to surrounding equipment. Therefore, rapid arc extinction during contact action is a technical problem to be considered.

Among the relay open circuits, one is an alternating current circuit and the other is a direct current circuit. Alternating current electric arcs generated when the relay opens and closes the alternating current circuit are easy to extinguish due to the zero-break phenomenon, direct current generated when the relay opens and closes the direct current circuit has no zero-break phenomenon due to the electric arcs, and the electric arcs can keep a stable combustion state if no external force intervenes, and are not easy to extinguish.

Typical arc extinguishing methods include a magnetic quenching method, a grid arc extinguishing method, a longitudinal seam arc extinguishing method, a vacuum arc extinguishing method and the like. The existing relay adopting magnetic quenching usually arranges magnetic steel for magnetic quenching in a shell, so that the layout and the structure of the original relay body cannot be changed, and the size of the original relay is increased.

If the utility model discloses a chinese utility model patent of patent number ZL201820652631.5, the name "a magnetic quenching relay" is just disclosed in 2019, 01 month 04, it includes support piece, magnetic quenching mechanism, movable spring, sets up in support piece's quiet spring to and be used for driving movable spring motion and with the electromagnetism actuating mechanism of quiet spring contact or separation, magnetic quenching mechanism includes insulating bars piece, the magnet subassembly of setting on support piece, insulating bars piece integrated into one piece is on support piece to the cooperation is between quiet spring and movable spring. The utility model discloses a make insulated gate piece and support piece integrated into one piece, need not additionally to assemble insulated gate piece, when reaching the arc extinguishing effect, saved the part, simplified the assembly process. But its magnet subassembly sets up on the base, inevitably increases the volume of relay body.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a direct current relay with magnetic blow-out arc extinguishing function, it is under the volume that does not enlarge the direct current relay body and do not change the prerequisite of original direct current relay structural configuration, has magnetic blow-out arc extinguishing function, has prolonged direct current relay's life-span.

In order to achieve the above purpose, the technical scheme of the utility model is that: the utility model provides a direct current relay with magnetic blow-out arc extinguishing function, which comprises a housin, magnetic circuit mechanism, actuating mechanism and contact mechanism, the casing includes the base and connects the upper cover on the base, magnetic circuit mechanism, actuating mechanism and contact mechanism dress are on the base, contact mechanism includes quiet reed and the movable contact who corresponds with it, the stationary contact has been linked firmly on the quiet reed, the movable contact has been linked firmly on the movable contact, magnetic force through the magnetic circuit mechanism production makes actuating mechanism move, actuating mechanism drives the movable contact action and makes movable contact and stationary contact engage or break away from mutually, be equipped with the recess on the upper cover up end on quiet contact and movable contact next door, the recess comprises upper cover up end and the outside round bounding wall that extends, the recess is embedded to have the magnet steel, the magnetic pole direction of magnet steel is mutually perpendicular with the current direction when movable contact and stationary contact.

Further improve, the inboard side of bounding wall has a plurality of joint convex parts towards the middle extension, and a plurality of joint convex parts block the magnet steel. To facilitate assembly and positioning.

And furthermore, a gap formed between the outer side surface of the magnetic steel and the inner side surface of the coaming is filled with bonding glue. Thus, the magnetic steel can be ensured to be reliably and fixedly connected in the groove.

Furthermore, the upper end surface of the upper cover is inwards recessed corresponding to the groove, and the bottom of the groove is also inwards recessed correspondingly. Therefore, the magnetic poles of the magnetic steel are closer to the static contact and the movable contact, and the magnetic blow effect is better.

Preferably the shroud is substantially square.

Preferably, the dc relay is a magnetically latching dc relay.

Further, the magnetic circuit mechanism comprises a coil framework, an iron core and two L-shaped yokes, wherein a coil is arranged on the coil framework, the iron core is arranged in the middle of the coil framework, one ends of the two L-shaped yokes are arranged at intervals and correspond to each other, and the other ends of the two L-shaped yokes are fixedly connected to two sides of the coil framework respectively and connected with the iron core;

the driving mechanism comprises a rotating frame and a push-pull rod, one end of the push-pull rod is connected with a movable reed, the other end of the push-pull rod is connected with the rotating frame, the rotating frame is arranged between one ends of the two L-shaped yokes, an upper pin joint pin is arranged on the upper side of the rotating frame, a lower pin joint pin is arranged on the lower side of the rotating frame and is inserted on the shell, the upper pin joint pin is connected onto a pressing plate, the pressing plate is connected into the shell through two connecting posts, a permanent magnet and two parallel armatures are arranged on the rotating frame, the middle parts of the two armatures are respectively connected with two magnetic poles of the permanent magnet to form an I-shaped armature component, one pole on one side of the I-shaped armature component is attracted with one end of one L-shaped yoke, and one pole on the other side of the I-shaped armature component is attracted with one end of the other L-shaped yoke.

Furthermore, one end of the push-pull rod is provided with a clamping groove, the other end of the push-pull rod is provided with a clamping through hole, the rotating frame extends outwards to form a driving portion, the push-pull rod is clamped with the movable reed through the clamping groove at one end, and one end of the driving portion is inserted into the clamping through hole.

Furthermore, a pin joint through hole is arranged in the middle of the pressing plate and is connected with the upper pin joint pin through the pin joint through hole, and a boss is arranged on the periphery of the pin joint through hole on the upper end face of the pressing plate. The boss can prevent glue from entering the pivoting through hole on the pressing plate when the pressing plate is fixed by glue dispensing, and the phenomenon that the rotating frame cannot rotate due to the fact that the upper pivoting pin is stuck is avoided.

Furthermore, two clamping grooves are arranged below one side of the pressing plate, the two clamping grooves are respectively clamped at one ends of the two L-shaped yokes, and the lower side of the other side of the pressing plate is connected with the two connecting columns into a whole. Therefore, the pressing plate is more stably installed, and the reliability of the action of the rotating frame is improved.

The utility model discloses because the magnet steel that is used for the magnetic blow-out arc is inlayed on the recess of the upper cover up end on stationary contact and movable contact next door, and this recess is covered up the terminal surface by the upper cover and outwards extends the round bounding wall and constitutes, and the magnetic pole direction of magnet steel is mutually perpendicular with the current direction when the contact of movable contact and stationary contact again. Therefore, the internal structure of the direct current relay is not influenced, the volume of the direct current relay body is not enlarged, and the structural layout of the original direct current relay is not changed. On the other hand, due to the magnetic arc quenching function, the service lives of the fixed contact and the movable contact can be prolonged, and the service life of the direct current relay is correspondingly prolonged. In addition, the magnetic steel for arc extinction with the structure is easy to install from top to bottom, and automatic assembly is facilitated.

Drawings

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a perspective view of the hidden housing of the present invention;

fig. 3 is an exploded perspective view of the present invention;

fig. 4 is a top view of the present invention;

FIG. 5 is a sectional view A-A of FIG. 4;

fig. 6 is a schematic view of the magnetic blowing state of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1 to 5, a dc relay with a magnetic quenching function is a magnetic latching dc relay, and includes a housing 1, a magnetic circuit mechanism 2, a driving mechanism 3, and a contact mechanism 45, where the housing 1 includes a base 11 and an upper cover 12 clamped on the base 11, and the magnetic circuit mechanism 2, the driving mechanism 3, and the contact mechanism 45 are mounted on the base 11; the contact mechanism 45 comprises a static reed 4 and a movable reed 5 corresponding to the static reed, wherein the static reed 4 is fixedly connected with a static contact 41, the movable reed 5 is fixedly connected with a movable contact 51, the static reed 4 and a static reed leading-out piece are of an integrated structure, the static reed 4 is clamped on the base 11, one end of the movable reed 5 is fixedly connected with a movable reed leading-out piece 5a, and the movable reed leading-out piece 5a is clamped on the base 11; the magnetic force generated by the magnetic circuit mechanism 2 actuates the driving mechanism 3, and the driving mechanism 3 drives the movable spring 5 to actuate, so that the movable contact 51 and the fixed contact 41 are engaged or disengaged.

A groove 121 is arranged on the upper end face of the upper cover 12 beside the fixed contact 41 and the movable contact 51, a magnetic steel 6 is embedded in the groove 121, and the magnetic pole direction of the magnetic steel 6 is vertical to the current direction when the movable contact 51 contacts with the fixed contact 41.

The groove 121 is formed by the upper end face of the upper cover 12 and a circle of coaming 122 extending outwards, the inner side face of the coaming 122 extends towards the middle to form four clamping convex parts 123, the four clamping convex parts 123 clamp the magnetic steel 6, and a gap formed between the outer side face of the magnetic steel 6 and the inner side face of the coaming 122 is filled with bonding glue. So as to facilitate assembly and positioning and ensure that the magnetic steel 6 is reliably and fixedly connected in the groove 121, preferably, the coaming 122 is a square coaming 122.

The upper end surface of the upper cover 12 is recessed corresponding to the groove 121, and the bottom of the groove 121 is also recessed corresponding to the inner side. Thus, as further shown in fig. 5, the distance a between the magnetic pole of the magnetic steel 6 and the center of the contact can be shortened to enhance the magnetic field intensity during magnetic blow.

The magnetic circuit mechanism 2 comprises a coil framework 21, an iron core 22 and two L-shaped yokes 23, wherein a coil 24 is arranged on the coil framework 21, the iron core 22 is arranged in the middle of the coil 24 framework 21, one ends of the two L-shaped yokes 23 are arranged at intervals and correspond to each other, and the other ends of the two L-shaped yokes 23 are fixedly connected to two sides of the coil 24 framework 21 and connected with the iron core 22 respectively;

the driving mechanism 3 comprises a rotating frame 31 and a push-pull rod 32, one end of the push-pull rod 32 is connected with a movable spring 5, the other end of the push-pull rod 32 is connected with the rotating frame 31, the rotating frame 31 is positioned between one ends of two L-shaped yokes 23, an upper pivoting pin 311 is arranged on the upper side of the rotating frame 31, a lower pivoting pin 312 is arranged on the lower side of the rotating frame 31 and is inserted on a base 11 of the shell 1, the upper pivoting pin 311 is connected on a pressing plate 33, the pressing plate 33 is connected on the base 11 of the shell 1 through two connecting posts 331, a permanent magnet and two parallel armatures are arranged on the rotating frame 31, the middle parts of the two armatures are respectively connected with two magnetic poles of the permanent magnet to form an I-shaped armature component 313, one pole on one side of the I-shaped armature component 313 is attracted with one end of one L-shaped yoke 23, and one pole on the other side of the I-shaped armature component 313 is attracted with one end of the other L-shaped yoke 23.

One end of the push-pull rod 32 is provided with a clamping groove 321, the other end of the push-pull rod is provided with a clamping through hole 322, the rotating frame 31 extends outwards to form a driving portion 314, the push-pull rod 32 is clamped with the movable reed 5 through the clamping groove 321 at one end, and one end of the driving portion 314 is inserted into the clamping through hole 322.

A pivot through hole 332 is formed in the middle of the pressing plate 33, and is connected to the upper pivot pin 311 through the pivot through hole 332, and a boss 333 is formed on the periphery of the pivot through hole 332 on the upper end surface of the pressing plate 33. Thus, the boss 333 prevents glue from entering the pivot hole 332 when the fixing plate is glued.

Two matching grooves 334 are formed in the lower face of one side of the pressing plate 33, the two matching grooves 334 are clamped at one ends of the two L-shaped yokes 23 respectively, and the lower face of the other side of the pressing plate 33 is connected with the two connecting columns 331 into a whole. Therefore, the pressure plate 33 has better stability, and is beneficial to improving the reliability of the action of the rotating frame 31.

In this embodiment, the magnetic pole below the magnetic steel 6 is the S pole, and the magnetic pole above the magnetic steel 6 is the N pole. The magnetic pole of the magnetic steel 6 is changed into an upper S pole and a lower N pole, and the same technical effect can be achieved.

Referring to fig. 2 and 6, in the operation of this embodiment, since the magnetic pole direction of the magnetic steel 6 is perpendicular to the current direction when the movable contact 51 and the fixed contact 41 are in contact, the magnetic steel 6 generates a magnetic field with magnetic lines of force perpendicular to the current direction when the movable contact 51 and the fixed contact 41 are in contact in the space where the movable contact 51 and the fixed contact 41 are located, when the dc pulse voltage excites the coil 24, the rotating frame 31 rotates to drive the push-pull rod 32 to displace, the push-pull rod 32 pulls the movable contact 5 to operate, and the movable contact 51 and the fixed contact 41 are disconnected to generate an electric arc, because the current direction of the electric arc is consistent with the current direction when the movable contact 51 and the fixed contact 41 are in contact at this time, the electric arc current I generates a force F under the action of the magnetic field B, and the electric arc is guided to the movable contact 5 side by the force F to extinguish the electric arc.

While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The utility model provides a direct current relay with magnetic quenching function, which comprises a housin, magnetic circuit mechanism, actuating mechanism and contact mechanism, the casing includes the base and connects the upper cover on the base, magnetic circuit mechanism, actuating mechanism and contact mechanism dress are on the base, contact mechanism includes static reed and the movable contact who corresponds with it, the static contact has been linked firmly on the static reed, the movable contact has been linked firmly on the movable contact, magnetic force through the magnetic circuit mechanism production makes actuating mechanism move, actuating mechanism drives the movable contact action and makes movable contact and static contact engage or break away from mutually, its characterized in that: the upper end face of the upper cover beside the fixed contact and the movable contact is provided with a groove, the groove is formed by the upper end face of the upper cover and a circle of coaming plate extending outwards, magnetic steel is embedded in the groove, and the magnetic pole direction of the magnetic steel is perpendicular to the current direction when the movable contact and the fixed contact are contacted.

2. The direct-current relay with the magnetic quenching function according to claim 1, characterized in that: the inboard of bounding wall is towards middle extension has a plurality of joint convex parts, and a plurality of joint convex parts block the magnet steel.

3. The direct-current relay with the magnetic quenching function according to claim 2, characterized in that: and a gap formed between the outer side face of the magnetic steel and the inner side face of the coaming is filled with bonding glue.

4. The direct-current relay with the magnetic quenching function according to claim 1, characterized in that: the upper end face of the upper cover is inwards recessed corresponding to the groove, and the bottom of the groove is also inwards recessed correspondingly.

5. The direct-current relay with the magnetic quenching function according to claim 1, characterized in that: the shroud is generally square in shape.

6. The direct-current relay with the magnetic quenching function according to any one of claims 1 to 5, characterized in that: the direct current relay is a magnetic latching direct current relay.

7. The direct-current relay with the magnetic quenching function according to claim 6, characterized in that: the magnetic circuit mechanism comprises a coil framework, an iron core and two L-shaped yokes, wherein a coil is arranged on the coil framework, the iron core is arranged in the middle of the coil framework, one ends of the two L-shaped yokes are arranged at intervals and correspond to each other, and the other ends of the two L-shaped yokes are fixedly connected to two sides of the coil framework respectively and connected with the iron core;

8. The direct-current relay with the magnetic quenching function according to claim 7, characterized in that: one end of the push-pull rod is provided with a clamping groove, the other end of the push-pull rod is provided with a clamping through hole, the rotating frame extends outwards to form a driving portion, the push-pull rod is clamped with the movable reed by utilizing the clamping groove at one end, and one end of the driving portion is inserted into the clamping through hole.

9. The dc relay with magnetic quenching function according to claim 7, wherein: the middle of the pressing plate is provided with a pin joint through hole which is connected with the upper pin joint pin, and the periphery of the pin joint through hole on the upper end surface of the pressing plate is provided with a boss.

10. The dc relay with magnetic quenching function according to claim 7, wherein: two clamping grooves are formed in the lower face of one side of the pressing plate, the two clamping grooves are clamped at one ends of the two L-shaped yokes respectively, and the lower face of the other side of the pressing plate is connected with the two connecting columns into a whole.