CN220138158U

CN220138158U - High-voltage-dividing electromagnetic relay

Info

Publication number: CN220138158U
Application number: CN202321569859.5U
Authority: CN
Inventors: 祝豪徽; 颜小小; 郭皓阳; 蔡一凡; 张钟月
Original assignee: Zhejiang Meishuo Electric Technology Co ltd
Current assignee: Zhejiang Meishuo Electric Technology Co ltd
Priority date: 2023-06-19
Filing date: 2023-06-19
Publication date: 2023-12-05
Anticipated expiration: 2033-06-19

Abstract

The utility model discloses a high-resolution electromagnetic relay which comprises a base, a cavity opening structure arranged at one end of the base, and a movable reed and a static reed which are oppositely arranged in the cavity opening structure, wherein the static reed is arranged at the top of the cavity opening structure and is provided with a guide part which is formed by bending at right angles, the guide part is positioned at one side of a contact gap between the movable reed and the static reed, and the bottom of the cavity opening structure is provided with an arc striking plate positioned at one end of the movable reed. By adopting the technical scheme, when the movable reed and the static reed generate electric arcs when breaking large current, the electric arcs can be attracted to the striking plate from the gap positions of the contacts, so that the effect of elongating the electric arcs is achieved, meanwhile, the lead part generates electrodynamic force to drive the electric arcs to move and elongate towards the other side of the gap of the contacts, the arc breaking effect is achieved after the length of the electric arcs is elongated to a sufficient distance, the burning of the electric arcs is not maintained, the aim of arc quenching is fulfilled, the burning time of the electric arcs is greatly shortened, the burning of the shell around the contact and cavity opening structures is reduced, and the service life is long.

Description

High-voltage-dividing electromagnetic relay

Technical Field

The utility model relates to the technical field of relays, in particular to a high-voltage-dividing electromagnetic relay.

Background

An electromagnetic relay is an electronic control device, which has a control system (also called an input loop) and a controlled system (also called an output loop), and is generally applied to an automatic control circuit, so that the electromagnetic relay plays roles of automatic regulation, safety protection, circuit switching and the like in the circuit.

Along with the rapid development of new energy industry, higher requirements are also provided for the load voltage of the electromagnetic relay, the electromagnetic relay can be better used on a power distribution circuit of new energy equipment, and the rated voltage can be 400V on the basis of small volume of the existing electromagnetic relay, so that the requirements of a high-power distribution circuit can be met. The electromagnetic relay mainly comprises a shell, a magnetic circuit part, a contact part and a push rod, wherein the contact part consists of a movable reed and a static reed which are arranged on a base, and contacts are respectively arranged on the movable reed and the static reed relatively; however, when the electromagnetic relay is disconnected, because the load voltage reaches 400V, an arc with extremely high energy can be generated between the contacts of the movable reed and the static reed, and the space around the movable reed and the static reed is relatively narrow, the arc is not easy to be lengthened and extinguished, the burning time of the arc is prolonged, and the arc cannot be effectively extinguished when the voltage crosses zero, so that the contact is burnt, the plastic shell around the contact is seriously burnt, and the service life of a product is shortened.

Disclosure of Invention

Therefore, the technical problem to be solved by the utility model is to solve the problems that the arc generated by breaking a high-voltage load of the electromagnetic relay in the prior art is not easy to extinguish, the burning time of the arc is prolonged, the contact and the surrounding plastic shell are seriously burnt, and the service life of the product is shortened.

In order to solve the problems, the utility model provides a high-resolution electromagnetic relay, which comprises a base and a reed component arranged on the base, wherein the base comprises an inner cavity and a cavity opening structure arranged at one end of the inner cavity, the reed component comprises a movable reed and a static reed which are oppositely arranged in the cavity opening structure, the static reed is arranged at the top of the cavity opening structure and is provided with a guide foot part which penetrates out of the bottom surface of the base after being bent at right angles, the guide foot part is correspondingly arranged at one side of a contact gap between the movable reed and the static reed, the guide foot part generates electric force for driving an electric arc to move and stretch towards the other side of the contact gap when current passes through, and the bottom of the cavity opening structure is provided with an arc striking plate positioned at one end of the movable reed, and the end part of the arc striking plate extends towards one side of the static reed in a V-shaped structure.

As a preferable scheme, a limiting piece is arranged between the bottom of the cavity opening structure and the movable reed, and the limiting piece is of a flat piece structure or an L-shaped piece structure.

As a preferable scheme, the bottom of the cavity opening structure is provided with at least one first clamping groove used for clamping the limiting piece, a guide chute extending to the port of the cavity opening structure is arranged in the first clamping groove, and the limiting piece is provided with a guide lug which is inserted into the guide chute in an extrusion mode.

As a preferable scheme, the arc striking plate is integrally connected to one side edge of the limiting piece.

As a preferable scheme, a fixing groove is formed in the bottom of the cavity opening structure, and the arc striking plate is installed in the fixing groove along the opening direction perpendicular to the cavity opening structure.

As a preferable scheme, the top of the cavity opening structure is provided with a second clamping groove, one end of the cavity opening structure is provided with a third clamping groove which is vertically connected with the second clamping groove, the static reed comprises a contact part provided with a static contact, the contact part is clamped and fixed in the second clamping groove, and the guide part is clamped and fixed in the third clamping groove.

As a preferred scheme, the other end of the cavity opening structure is provided with a notch penetrating through the upper side face of the base.

As a preferred scheme, still be provided with on the base and be used for the drive movable reed and the contact of static reed or the magnetic circuit subassembly of separation, magnetic circuit subassembly includes coil former, coil, yoke and armature, coil former integrated into one piece is in the upper side of base, the armature can swing and set up in the base, movable reed with armature linkage sets up, run through on the base and be provided with two sets of jack structures, alternate in any set of jack structure to have a set of contact pin relatively, make the lead pin of coil connect in on the contact pin.

Preferably, the upper side of the base is provided with a strip-shaped groove at a position close to the cavity opening structure.

As a preferable scheme, a limiting groove with a certain gradient is formed at the top of the cavity opening structure, and the stationary contact is inserted into the limiting groove.

Compared with the prior art, the technical scheme of the utility model has the following advantages:

1. in the electromagnetic relay provided by the utility model, the contact or separation is realized in the cavity opening structure according to the movable reed and the static reed, the contact gap is formed between the movable reed and the static reed in the separation state, the bent guide part of the static reed is just positioned at one side of the contact gap, the guide part can generate electromotive force for driving the arc to move and stretch towards the other side of the contact gap when current passes through, the electromotive force is utilized to play a role of magnetic arc quenching, and the arc striking plate extending towards one side of the static reed is arranged at one end of the movable reed.

2. In the electromagnetic relay provided by the utility model, because the small interval between the movable reed and the static reed is unfavorable for arc quenching, the end part of the arc striking plate is designed into a V-shaped structure, so that the arc is easier to attract, the contact gap between the breaking arc driven and the static reed can be guided to the end part of the arc striking plate, the arc on the arc striking plate is further elongated by utilizing the magnetic blowing action of electric power, and particularly, the driving arc is elongated in an arc shape towards the other side space of the contact gap, thereby achieving the purpose of arc breaking.

3. According to the electromagnetic relay provided by the utility model, the swing distance of the movable reed in the cavity opening structure is limited according to the design of various contact strokes of the relay, and the limiting piece is arranged between the bottom of the cavity opening structure and the movable reed and is used for limiting the swing distance of the movable reed to the side far away from the fixed reed, and meanwhile, the movable reed is prevented from being contacted with the base, and the limiting piece can be designed to be in a flat piece structure or an L-shaped piece structure so as to meet the design requirement of various contact strokes of the relay.

4. In the electromagnetic relay provided by the utility model, the arc striking plate is L-shaped and is formed with the limiting piece into an integral structure, the forming and manufacturing are convenient, the mounting process is simplified, and the limiting piece is only required to be inserted into the first clamping groove at the bottom of the cavity opening structure in a clamping manner, so that the limiting piece and the arc striking plate can be mounted and fixed in the cavity opening structure in one step, the mounting is convenient and quick, and the mounting efficiency is improved.

5. In the electromagnetic relay provided by the utility model, the strip-shaped groove close to the structural position of the cavity opening is formed on the upper side surface of the base, and the static contact is inserted into the limit groove with a certain gradient.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.

Fig. 1 is a schematic perspective view of an electromagnetic relay according to the present utility model;

fig. 2 is a schematic plan view of the electromagnetic relay of the present utility model;

fig. 3 is a schematic cross-sectional structure of the electromagnetic relay of the present utility model;

FIG. 4 is a schematic view of the structure of the base and coil former of the present utility model;

FIG. 5 is a schematic view of the limiting plate and the arc striking plate according to the present utility model;

FIG. 6 is a schematic view of an installation structure of another modification of the limiting plate of the present utility model;

reference numerals illustrate: 1. a base; 11. a cavity port structure; 12. a first clamping groove; 13. a second clamping groove; 14. a third clamping groove; 15. notching; 16. a jack structure; 17. a contact pin; 2. a movable reed; 3. a static reed; 31. a lead portion; 32. a contact portion; 4. a contact gap; 5. an arc striking plate; 6. a limiting piece; 61. a guide projection; 7. a strip-shaped groove; 8. a limit groove; 91. a coil former; 92. a coil; 93. a yoke; 94. an armature.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Example 1

The embodiment provides a high-resolution electromagnetic relay as shown in fig. 1-6, which comprises a base 1 with an inner cavity and a reed assembly arranged on the base 1, wherein one end of the base 1 is provided with a cavity opening structure 11, the reed assembly comprises a movable reed 2 and a static reed 3 which are oppositely arranged in the cavity opening structure 11, the movable reed 2 and the static reed 3 are respectively and correspondingly provided with a movable contact and a static contact, the static reed 3 is arranged at the top of the cavity opening structure 11 and is provided with a guide part 31 which penetrates through the bottom surface of the base 1 after being bent at right angles, the guide part 31 is correspondingly arranged at one side of a contact gap 4 between the movable reed 2 and the static reed 3, the guide part 31 generates electric force for driving electric arcs to move and stretch towards the other side of the contact gap 4 when current passes, the bottom of the cavity opening structure 11 is provided with an arc striking plate 5 positioned at one end of the movable reed 2, and the arc striking plate 5 extends towards one side of the static reed 3 for a set distance.

The above embodiment is a core technical solution of this embodiment, according to which the movable reed and the static reed realize contact or separation in the cavity opening structure 11, and both form the contact gap 4 in a separated state, the lead part 31 formed by bending the static reed 3 is just located at one side of the contact gap 4, and generates a magnetic field according to the current flowing through the lead part 31, and according to the current flow direction, the lead part 31 generates electromotive force for driving the arc to move and stretch to the other side of the contact gap 4, i.e. the electromotive force received by the arc is perpendicular to the lead part 31 and faces the contact gap 4, and plays a role of magnetic arc extinguishing by using the electromotive force, and an arc striking plate 5 extending to one side of the static reed 3 is arranged at one end of the movable reed 2.

As a preferred embodiment, the end of the striking plate extends towards one side of the static reed in a V-shaped structure, the V-shaped structure is easier to attract the arc, the contact gap between the driven arc and the static reed can be guided to the end position of the striking plate 5, the arc on the striking plate 5 is further elongated by utilizing the magnetic blowing action of electromotive force, and particularly, the arc is driven to be elongated in an arc shape towards the other side space of the contact gap, so that the purpose of breaking the arc is achieved.

In this embodiment, according to the fact that the relay has multiple contact stroke designs, the swing distance of the movable reed 2 in the cavity opening structure needs to be limited, and by arranging the limiting piece 6 between the bottom of the cavity opening structure 11 and the movable reed 2, the limiting piece 6 is used for limiting the swing distance of the movable reed 2 to the side far away from the fixed reed, meanwhile, the contact between the movable reed 2 and the base 1 is avoided, when the contact stroke of the electromagnetic relay is designed to be large, referring to fig. 1 and 5, the limiting piece 6 can be designed to be in a flat piece structure, so that the root of the movable contact is matched and abutted against the flat piece structure; and when the contact stroke of the electromagnetic relay is designed to be smaller, as a modification, referring to fig. 6, the limit piece 6 may be designed into an L-shaped piece structure, so that the root of the movable contact is abutted against the L-shaped piece structure in a matching manner. Therefore, the limiting piece can be designed to be in a flat piece structure or an L-shaped piece structure so as to meet the design requirements of various contact strokes of the relay.

As shown in fig. 4, a first clamping groove 12 for clamping the limiting piece 6 is formed in the bottom of the cavity opening structure 11, a guiding chute extending to the port of the cavity opening structure 11 is formed in the first clamping groove 12, a guiding protruding block 61 is formed on the limiting piece 6 and is inserted into the guiding chute in a pressing mode, the limiting piece is guided and installed through the matching of the guiding chute and the guiding protruding block, the situation that the limiting piece is installed in a staggered mode in the position direction is avoided, the limiting piece is matched with the clamping of the first clamping groove to achieve installation and fixation at the bottom of the cavity opening structure, the arc striking plate 5 is integrally connected to one side edge of the limiting piece 6 in an L shape, the integral structure is convenient to manufacture, the installation process is simplified, and as long as the limiting piece is clamped and inserted into the first clamping groove 12 at the bottom of the cavity opening structure 11, the limiting piece 6 and the arc striking plate 5 are installed and fixed in the cavity opening structure in place in one step, and installation efficiency is improved.

In the above embodiment, although the arc striking plate and the limiting plate are preferably installed and fixed as an integral structure, the arc striking plate may be installed separately with respect to the limiting plate, as an alternative, the bottom of the cavity opening structure 11 is provided with a fixing groove, the arc striking plate is installed in the fixing groove along the opening direction perpendicular to the cavity opening structure, and the other end of the arc striking plate far from the V-shaped structure is fixedly inserted into the fixing groove. Those skilled in the art can make a selection on a specific arrangement manner of the arc striking plate according to the above description, and no further description is given here for other equivalent manners.

In order to ensure that the static reed 3 is reliably installed in the cavity opening structure 11, a second clamping groove 13 is formed in the top of the cavity opening structure 11, a third clamping groove 14 which is vertically connected with the second clamping groove 13 is formed in one end of the cavity opening structure 11, the static reed 3 comprises a contact portion 32 provided with a static contact, the contact portion 32 is fixedly clamped in the second clamping groove 13, the guide portion 31 is fixedly clamped in the third clamping groove 14, and the limiting clamping of the contact portion 32 and the guide portion 31 of the static reed 3 is realized through the second clamping groove 13 and the third clamping groove 14, so that the static reed 3 is fixedly installed in the cavity opening structure 11. The other end of the cavity opening structure 11 is provided with a notch 15 penetrating through the upper side surface of the base 1, and the arc gas is sprayed to the space where the other end of the cavity opening structure is located under the action of electrodynamic force, so that the arc gas and some particles can be discharged out of the cavity opening structure through the notch, and the exhaust is smoother.

As shown in fig. 1-3, the base 1 is further provided with a magnetic circuit assembly for driving the movable spring 2 to contact with or separate from the static spring 3, the magnetic circuit assembly comprises a coil frame 91, a coil 92, a magnetic yoke 93 and an armature 94, the coil frame 91 is integrally formed on the upper side surface of the base 1, the coil 92 is wound on the coil frame 91, the armature 94 is arranged in the base 1 in a swinging manner, the movable spring 2 and the armature 94 are arranged in a linkage manner, and electromagnetic force generated by energizing the coil 92 can attract the armature 94 to swing, so that the armature 94 drives the movable spring 2 to contact with the static spring 3. Two sets of jack structures 16 are arranged on the base 1 in a penetrating manner, and a set of opposite pins 17 are inserted into any set of jack structures 16, so that the lead pins of the coil 92 are connected with the pins 17. In practice, because the specifications and models of the selected circuit boards are different, the positions of the connecting holes on the circuit boards are changed, so that two groups of jack structures 16 are designed to be just corresponding to the connecting holes on different circuit boards, and a group of pins 17 are arranged in one group of jack structures 16 in a penetrating manner according to the selection.

In order to increase the safe creepage distance between the coil 92 and the static reed 3, as shown in fig. 1 and 4, the upper side surface of the base 1 is formed with a bar-shaped groove 7 at a position close to the cavity opening structure 11, in addition, a limit groove 8 with a certain gradient is formed at the top of the cavity opening structure 11, so that the static contact is inserted into the limit groove 8, the distance from the static contact to the edge of the cavity opening structure 11 is increased by utilizing the gradient design of the limit groove, and the arrangement of the structure ensures that the safe electric clearance is ensured by enlarging the creepage distance between the static reed and the coil through the bar-shaped groove 7 and the limit groove 8.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the utility model.

Claims

1. The utility model provides a high-voltage relay, including have base (1) of inner chamber with set up in the reed subassembly of base (1), cavity mouth structure (11) have been seted up to base (1) one end, the reed subassembly including set up relatively in movable reed (2) and static reed (3) in cavity mouth structure (11), its characterized in that: the static reed (3) is arranged at the top of the cavity opening structure (11) and is provided with a lead part (31) which penetrates out of the bottom surface of the base (1) after being bent at a right angle, the lead part (31) is correspondingly arranged at one side of a contact gap (4) between the movable reed (2) and the static reed (3), the lead part (31) generates electromotive force for driving an electric arc to move and stretch towards the other side of the contact gap (4) when passing current, the bottom of the cavity opening structure (11) is provided with an arc striking plate (5) positioned at one end of the movable reed (2), and the end part of the arc striking plate (5) extends towards one side of the static reed (3) in a V-shaped structure.

2. The high voltage division electromagnetic relay according to claim 1, wherein: a limiting piece (6) is arranged between the bottom of the cavity opening structure (11) and the movable reed (2), and the limiting piece (6) is of a straight piece structure or an L-shaped piece structure.

3. The high voltage division electromagnetic relay according to claim 2, wherein: the bottom of the cavity opening structure (11) is provided with a first clamping groove (12) used for clamping the limiting piece (6), a guide chute extending to the port of the cavity opening structure (11) is arranged in the first clamping groove (12), and the limiting piece (6) is provided with a guide lug (61) which is inserted into the guide chute in a extrusion mode.

4. The high voltage division electromagnetic relay according to claim 3, wherein: the arc striking plate (5) is integrally connected to one side edge of the limiting piece (6).

5. The high voltage division electromagnetic relay according to claim 1, wherein: the bottom of the cavity opening structure (11) is provided with a fixed groove, and the arc striking plate is arranged in the fixed groove along the opening direction perpendicular to the cavity opening structure.

6. The high voltage division electromagnetic relay of claim 5 wherein: the top of accent structure (11) is provided with second draw-in groove (13), the one end of accent structure (11) is provided with and is perpendicular continuous third draw-in groove (14) with second draw-in groove (13), quiet reed (3) are including being equipped with contact portion (32) of stationary contact, contact portion (32) chucking is fixed in second draw-in groove (13), lead foot (31) chucking is fixed in third draw-in groove (14).

7. The high voltage division electromagnetic relay of claim 6 wherein: the other end of the cavity opening structure (11) is provided with a notch (15) penetrating through the upper side face of the base (1).

8. The high voltage division electromagnetic relay according to any one of claims 1 to 7, wherein: the novel movable contact spring is characterized in that a magnetic circuit assembly used for driving the movable contact spring (2) to be in contact with or separated from the static contact spring (3) is further arranged on the base (1), the magnetic circuit assembly comprises a coil frame (91), a coil (92), a magnetic yoke (93) and an armature (94), the coil frame (91) is integrally formed on the upper side face of the base (1), the armature (94) can be arranged in the base (1) in a swinging mode, the movable contact spring (2) and the armature (94) are arranged in a linkage mode, two groups of jack structures (16) penetrate through the base (1), and a group of opposite contact pins (17) penetrate through any group of jack structures (16), so that lead pins of the coil (92) are connected to the contact pins (17).

9. The high voltage division electromagnetic relay of claim 8 wherein: the upper side surface of the base (1) is provided with a strip-shaped groove (7) at a position close to the cavity opening structure.

10. The high voltage division electromagnetic relay of claim 6 wherein: and a limiting groove (8) with a certain gradient is formed at the top of the cavity opening structure (11), and the stationary contact is inserted into the limiting groove (8).