CN212084921U - Electromagnetic relay - Google Patents

Abstract

The utility model discloses an electromagnetic relay, include: the shell is provided with a partition plate, and the internal space of the shell is divided into an upper accommodating chamber and a lower accommodating chamber by the partition plate; a top cover mounted on the top opening of the housing to close the top opening; and a contact system, mounted in the upper receiving chamber of the housing, including a main contact and an auxiliary contact. And a main fixed contact in the main contacts is fixed on the top cover, and the auxiliary contacts are fixed on the partition plate so as to increase the distance between the main contacts and the auxiliary contacts in the height direction and the creepage distance between the main contacts and the auxiliary contacts. Therefore, the utility model discloses can improve electromagnetic relay's electrical insulation performance and security performance.

Description

Electromagnetic relay

Technical Field

The utility model relates to an electromagnetic relay.

Background

In the prior art, an electromagnetic relay generally comprises a housing, a contact system and an electromagnetic system. A partition plate (or called a fixed base) is formed in the housing, and the partition plate divides the inner space of the housing into an upper accommodating chamber and a lower accommodating chamber. The contact system is mounted in the upper receiving chamber of the housing. The electromagnetic system is mounted in the lower receiving chamber of the housing. The electromagnetic system is used for driving the active contact of the contact system to move. The electromagnetic system mainly comprises a coil framework, a magnetic conduction plate, a magnetic yoke, a coil and an iron core.

In the prior art, the electromagnetic relay further includes an auxiliary contact for monitoring the electrical connection state of the active contact, and the auxiliary contact is usually installed at a position close to the main stationary contact, for example, on the top cover, which may result in an excessively small creepage distance in the height direction between the auxiliary contact and the main contact and a poor insulation property.

SUMMERY OF THE UTILITY MODEL

The object of the present invention is to solve at least one of the above problems and drawbacks existing in the prior art.

According to an aspect of the present invention, there is provided an electromagnetic relay, including: the shell is provided with a partition plate, and the internal space of the shell is divided into an upper accommodating chamber and a lower accommodating chamber by the partition plate; a top cover mounted on the top opening of the housing to close the top opening; and a contact system, mounted in the upper receiving chamber of the housing, including a main contact and an auxiliary contact. And a main fixed contact in the main contacts is fixed on the top cover, and the auxiliary contacts are fixed on the partition plate so as to increase the distance between the main contacts and the auxiliary contacts in the height direction and the creepage distance between the main contacts and the auxiliary contacts.

According to an exemplary embodiment of the present invention, the contact system further comprises a rotating member, both ends of the rotating member being rotatably mounted on the partition plate and the top cover, respectively; the main contact is mounted on a rotating member adapted to drive the main contact between a closed position in contact with the main stationary contact and an open position separated from the main stationary contact.

According to another exemplary embodiment of the present invention, the auxiliary contact comprises an auxiliary stationary contact and an auxiliary moving contact fixed to the partition plate; when the main contact is in a closed position, the auxiliary moving contact is electrically contacted with the auxiliary fixed contact by virtue of the elastic deformation force of the auxiliary moving contact; when the main contact is in the off position, the rotating part overcomes the elastic deformation force of the auxiliary moving contact and pushes the auxiliary moving contact to a position separated from the auxiliary fixed contact.

According to another exemplary embodiment of the present invention, a pusher is provided on the rotating member, the pusher being adapted to push the auxiliary moving contact to move.

According to the utility model discloses a further exemplary embodiment, electromagnetic relay still includes two auxiliary contact external conductors, two auxiliary contact external conductors stretch into in the casing and respectively with auxiliary static contact with auxiliary moving contact electricity is connected.

According to another exemplary embodiment of the present invention, a first encapsulating structure for encapsulating the two auxiliary contact external wires is formed on the inner wall of the housing, so that the two auxiliary contact external wires are isolated from other components in the housing.

According to another exemplary embodiment of the present invention, the main contact includes two main stationary contacts, and the electromagnetic relay further includes two external bolts electrically connected to the two main stationary contacts respectively and fixed to the top cap; a vertical partition wall is formed on an outer surface of the top cover, and the two circumscribed bolts are located on both sides of the vertical partition wall and are separated by the vertical partition wall.

According to another exemplary embodiment of the present invention, the vertical partition wall perpendicularly intersects a plane defined by center lines of the two circumscribed bolts, and an intersection line of the two is a center line of the top cover.

According to another exemplary embodiment of the present invention, the electromagnetic relay further comprises a magnetic quenching system installed in the upper receiving chamber of the housing, the magnetic quenching system comprising: the insulating seat is fixed in the shell; and the permanent magnet is arranged on the insulating base, is adjacent to the main static contact and is used for extinguishing electric arcs between the main static contact and the active contact in a magnetic blowing mode.

According to another exemplary embodiment of the present invention, a through hole allowing the rotation member to pass therethrough is formed on the insulating base, and a permanent magnet installation chamber in which the permanent magnet is embedded is formed on an upper surface of the insulating base.

According to another exemplary embodiment of the present invention, the electromagnetic relay further comprises an electromagnetic system accommodated in the lower accommodation chamber of the housing for driving the rotation member to rotate, thereby driving the active contact to move between the closed position and the open position.

According to another exemplary embodiment of the present invention, the electromagnetic system includes a coil bobbin and a magnetic conductive plate, the electromagnetic relay further includes a plurality of threaded connectors, the plurality of threaded connectors will the coil bobbin or the magnetic conductive plate connect and fix on the division plate, thereby will the electromagnetic system is fixed on the casing.

According to another exemplary embodiment of the present invention, a plurality of first threaded holes are formed in the magnetic conductive plate, and a plurality of first connection holes corresponding to the plurality of first threaded holes, respectively, are formed in the partition plate; the plurality of threaded connectors respectively penetrate through the plurality of first connecting holes and are respectively screwed into the plurality of first threaded holes, so that the magnetic conduction plate is connected and fixed to the partition plate.

According to another exemplary embodiment of the present invention, a plurality of columnar first protruding portions extending downward are formed on the bottom surface of the partition plate, and the first protruding portions abut against the magnetic conductive plate, so that an accommodating space is formed between the partition plate and the magnetic conductive plate.

According to another exemplary embodiment of the present invention, the plurality of first connection holes are formed on a plurality of first protrusions of the separation plate, respectively.

According to another exemplary embodiment of the present invention, a plurality of second screw holes are formed on the bobbin, and a plurality of first connection holes corresponding to the plurality of second screw holes, respectively, are formed on the partition plate; the plurality of threaded connectors respectively pass through the plurality of first connection holes and are respectively threaded into the plurality of second threaded holes, so that the coil bobbin is connected and fixed to the partition plate.

According to another exemplary embodiment of the present invention, a plurality of second protrusions extending upward are formed on the top surface of the bobbin, and the second protrusions abut against the bottom surface of the partition plate, so that an accommodating space is formed between the partition plate and the bobbin; the magnetic conductive plate is accommodated in an accommodation space between the partition plate and the bobbin, and is fixed to the bobbin.

According to another exemplary embodiment of the present invention, the plurality of second screw holes are formed on the plurality of second bosses of the bobbin, respectively.

According to another exemplary embodiment of the present invention, the electromagnetic system further comprises: a yoke, inside which the coil bobbin is mounted; a coil wound around the cylindrical body of the bobbin; a lower core accommodated in a lower portion of the cylindrical body of the bobbin and fixed to the yoke; an upper iron core, the lower part of which is accommodated in the upper part of the cylindrical main body of the coil framework, and the upper part of which passes through the magnetic conduction plate; and the armature is positioned in the accommodating space between the separation plate and the coil frameworks and is fixed on the upper iron core, the upper iron core can wind the central axis of the cylindrical main body of the coil frameworks to rotate and is connected with the lower end of the rotating part to drive the rotating part to rotate.

According to the utility model discloses a further exemplary embodiment, electromagnetic relay still includes coil binding post and the external wire of coil, coil binding post fixes on the coil skeleton, the external wire of coil stretches into in the casing and with coil binding post electricity is connected.

According to another exemplary embodiment of the present invention, a second encapsulation structure for encapsulating the coil connection terminal and the coil external wire is formed on the inner wall of the housing, so that the coil connection terminal and the coil external wire are isolated from other components in the housing.

According to another exemplary embodiment of the present invention, the electromagnetic system is an integral module and is integrally mounted into the lower receiving chamber of the housing.

According to another exemplary embodiment of the present invention, the housing is cylindrical, and the electromagnetic relay further comprises a bottom cover, the bottom cover being mounted on the bottom opening of the housing to close the bottom opening.

According to another exemplary embodiment of the present invention, a pair of coupling ears protruding outward are formed on the outer circumferential wall near the bottom of the housing, and second coupling holes are formed on the coupling ears, so that the housing can be fixed by a coupling member passing through the second coupling holes.

In the utility model discloses an in the preceding each exemplary embodiment, main stationary contact is fixed on the top cap of casing, and auxiliary contact is fixed on the division board of the bottom of the last accommodation chamber of casing to make main contact and auxiliary contact distance maximize in the direction of height, greatly increased creepage distance between the two the biggest, improve electromagnetic relay's electrical insulation performance and security performance.

Other objects and advantages of the present invention will become apparent from the following description of the invention, which is made with reference to the accompanying drawings, and can help to provide a thorough understanding of the present invention.

Drawings

Fig. 1 shows a schematic diagram of an electromagnetic relay according to an exemplary embodiment of the present invention;

fig. 2 shows a longitudinal sectional view of the electromagnetic relay shown in fig. 1;

FIG. 3 shows a schematic diagram of an electromagnetic system, a contact system and a magnetic quenching system of the electromagnetic relay shown in FIG. 1;

fig. 4 shows a schematic view of an electromagnetic system of an electromagnetic relay according to an exemplary embodiment of the present invention;

fig. 5 shows a schematic perspective view of an electromagnetic system of the electromagnetic relay shown in fig. 4;

fig. 6 shows a schematic view of an electromagnetic system of an electromagnetic relay according to another exemplary embodiment of the present invention.

Detailed Description

The technical solution of the present invention is further specifically described below by way of examples and with reference to the accompanying drawings. In the specification, the same or similar reference numerals denote the same or similar components. The following description of the embodiments of the present invention with reference to the drawings is intended to explain the general inventive concept and should not be construed as limiting the invention.

Furthermore, in the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the disclosure. It may be evident, however, that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown in schematic form in order to simplify the drawing.

According to a general technical concept of the present invention, there is provided an electromagnetic relay, including: the shell is provided with a partition plate, and the internal space of the shell is divided into an upper accommodating chamber and a lower accommodating chamber by the partition plate; a top cover mounted on the top opening of the housing to close the top opening; and a contact system, mounted in the upper receiving chamber of the housing, including a main contact and an auxiliary contact. And a main fixed contact in the main contacts is fixed on the top cover, and the auxiliary contacts are fixed on the partition plate so as to increase the distance between the main contacts and the auxiliary contacts in the height direction and the creepage distance between the main contacts and the auxiliary contacts.

Fig. 1 shows a schematic diagram of an electromagnetic relay according to an exemplary embodiment of the present invention; fig. 2 shows a longitudinal sectional view of the electromagnetic relay shown in fig. 1; fig. 3 shows a schematic diagram of the electromagnetic system, the contact system and the magnetic quenching system of the electromagnetic relay shown in fig. 1.

As shown in fig. 1 to 3, in the illustrated embodiment, the electromagnetic relay includes a housing 10, a top cover 20, and a contact system. The housing 10 has a partition plate 11, and the partition plate 11 partitions an inner space of the housing 10 into upper and lower two receiving chambers. The top cover 20 is mounted on the top opening of the case 10 to close the top opening. The contact system is mounted in the upper receiving chamber of the housing 10 and comprises main contacts 211, 212 and auxiliary contacts 221, 222.

As shown in fig. 1 to 3, in the illustrated embodiment, the main stationary contact 211 of the main contacts 211 and 212 is fixed to the top cover 20, and the auxiliary contacts 221 and 222 are fixed to the partition plate 11, so as to increase the distance in the height direction between the main contacts 211 and 212 and the auxiliary contacts 221 and 222 and the creepage distance therebetween.

As shown in fig. 1 to 3, in the illustrated embodiment, the contact system further includes a rotating member 230, and both ends of the rotating member 230 are rotatably mounted on the partition plate 11 and the top cover 20, respectively. The active contact 212 of the main contacts 211, 212 is mounted on a rotary member 230, the rotary member 230 being adapted to drive the active contact 212 between a closed position in contact with the main stationary contact 211 and an open position separated from the main stationary contact 211.

As shown in fig. 1 to 3, in the illustrated embodiment, the auxiliary contacts 221, 222 include an auxiliary stationary contact 221 and an auxiliary movable contact 222 fixed to the partition plate 11. When the main contacts 211, 212 are in the closed position, the auxiliary movable contact 222 is in electrical contact with the auxiliary stationary contact 221 by virtue of its own elastic deformation force. When the main contacts 211 and 212 are in the open position, the rotating member 230 overcomes the elastic deformation force of the auxiliary moving contact 222, and pushes the auxiliary moving contact 222 to a position separated from the auxiliary stationary contact 221.

As shown in fig. 1 to 3, in the illustrated embodiment, a pushing member 231 is disposed on the rotating member 230, and the pushing member 231 is adapted to push the auxiliary movable contact 222 to move.

As shown in fig. 1 to 3, in the illustrated embodiment, the electromagnetic relay further includes two auxiliary contact external leads 221b, 222b, and the two auxiliary contact external leads 221b, 222b extend into the upper receiving chamber of the housing 10 and are electrically connected to the auxiliary stationary contact 221 and the auxiliary movable contact 222, respectively.

As shown in fig. 1 to 3, in the illustrated embodiment, a first enclosing structure 10b for enclosing the two auxiliary contact external leads 221b, 222b is formed on the inner wall of the housing 10, so that the two auxiliary contact external leads 221b, 222b are isolated from other components in the housing 10.

As shown in fig. 1 to 3, in the illustrated embodiment, the main contacts 211, 212 include two main stationary contacts 211, and the electromagnetic relay further includes two external bolts 211b electrically connected to the two main stationary contacts 211 and fixed on the top cover 20. A vertical partition wall 21 is formed on the outer surface of the top cover 20, and two circumscribed bolts 211b are positioned at both sides of the vertical partition wall 21 and partitioned by the vertical partition wall 21.

As shown in fig. 1 to 3, in the illustrated embodiment, the vertical partition wall 21 perpendicularly intersects a plane defined by the center lines of the two circumscribed bolts 211b, and the intersection line of the two is the center line of the top cover 20.

As shown in fig. 1 to 3, in the illustrated embodiment, the electromagnetic relay further includes a magnetic quenching system installed in the upper receiving chamber of the housing 10. The magnetic quenching system includes: an insulating base 240 and a permanent magnet 250. The insulating holder 240 is fixed in the housing 10. The permanent magnet 250 is mounted on the insulating base 240. A permanent magnet 250 is adjacent to the main stationary contact 211 for magnetically blowing out an arc between the main stationary contact 211 and the active contact 212.

As shown in fig. 1 to 3, in the illustrated embodiment, a through hole allowing the rotation member 230 to pass therethrough is formed on the insulating base 240, and a permanent magnet installation chamber in which the permanent magnet 250 is fitted is formed on the upper surface of the insulating base 240.

Fig. 4 shows a schematic view of an electromagnetic system 100 of an electromagnetic relay according to an exemplary embodiment of the present invention; fig. 5 shows a perspective view of the electromagnetic system 100 of the electromagnetic relay shown in fig. 4.

As shown in fig. 1 to 5, in the illustrated embodiment, the electromagnetic relay further includes an electromagnetic system 100, and the electromagnetic system 100 is accommodated in the lower accommodating chamber of the housing 10 and is used for driving the rotation member 230 to rotate, so as to drive the active contact 212 to move between the closed position and the open position.

As shown in fig. 1 to 5, in the illustrated embodiment, the electromagnetic system 100 includes a bobbin 121 and a magnetic conductive plate 140, and the electromagnetic relay further includes a plurality of screw connectors 160, and the plurality of screw connectors 160 connect and fix the bobbin 121 or the magnetic conductive plate 140 to the partition plate 11, thereby fixing the electromagnetic system 100 to the case 10.

As shown in fig. 1 to 5, in the illustrated embodiment, a plurality of second screw holes 121b are formed in the coil bobbin 121, and a plurality of first connection holes 11b corresponding to the plurality of second screw holes 121b, respectively, are formed in the partition plate 11. The plurality of screw-threaded connectors 160 pass through the plurality of first connection holes 11b, respectively, and are screw-threaded into the plurality of second screw holes 121b, respectively, thereby connecting and fixing the bobbin 121 to the partition plate 11.

As shown in fig. 1 to 5, in the illustrated embodiment, a plurality of second protrusions 121a having a pillar shape extending upward are formed on the top surface of the bobbin 121, and the second protrusions 121a abut against the bottom surface of the partition plate 11, thereby forming an accommodating space between the partition plate 11 and the bobbin 121. The magnetic conductive plate 140 is accommodated in the accommodation space between the partition plate 11 and the bobbin 121, and is fixed to the bobbin 121. As shown in fig. 1 to 5, in the illustrated embodiment, a plurality of second screw holes 121b are respectively formed on a plurality of second bosses 121a of the coil bobbin 121.

Fig. 6 shows a schematic view of an electromagnetic system of an electromagnetic relay according to another exemplary embodiment of the present invention.

As shown in fig. 6, in the illustrated embodiment, a plurality of first screw holes 141 are formed in the magnetic conductive plate 140, and a plurality of first connection holes 11b corresponding to the plurality of first screw holes 141 are formed in the partition plate 11. The plurality of screw connectors 160 pass through the plurality of first connection holes 11b, respectively, and are screwed into the plurality of first screw holes 141, respectively, thereby connecting and fixing the magnetic conductive plate 140 to the partition plate 11.

As shown in fig. 6, in the illustrated embodiment, a first protrusion 11a extending downward is formed on the bottom surface of the partition plate 11, and the first protrusion 11a abuts against the magnetic conductive plate 140, so that an accommodating space is formed between the partition plate 11 and the magnetic conductive plate 140.

As shown in fig. 6, in the illustrated embodiment, a plurality of first connection holes 11b are formed on a plurality of first bosses 11a of the partition plate 11, respectively.

As shown in fig. 1-6, in the illustrated embodiment, the electromagnetic system 100 further includes: a yoke 110, a coil bobbin 121 is installed inside the yoke 110; a coil 122 wound around the cylindrical body of the bobbin 121; a lower core 131 accommodated in a lower portion of the cylindrical body of the coil bobbin 121 and fixed to the yoke 110; an upper core 132, the lower part of which is accommodated in the upper part of the cylindrical body of the coil bobbin 121, and the upper part of which passes through the magnetic conductive plate 140; and an armature 150 positioned in the receiving space between the partition plate 11 and the bobbin 121 and fixed to the upper core 132, the upper core 132 being rotatable around the central axis of the cylindrical body of the bobbin 121 and connected to the lower end of the rotation member 230 to drive the rotation member 230 to rotate.

As shown in fig. 1 to 6, in the illustrated embodiment, the electromagnetic relay further includes a coil terminal 122a and a coil external lead 122b, the coil terminal 122a is fixed to the coil bobbin 121, and the coil external lead 122b extends into the upper receiving chamber of the housing 10 and is electrically connected to the coil terminal 122 a.

As shown in fig. 1 to 6, in the illustrated embodiment, a second enclosing structure 10a for enclosing the coil terminal 122a and the coil external lead 122b is formed on the inner wall of the case 10 such that the coil terminal 122a and the coil external lead 122b are isolated from other components within the case 10.

As shown in fig. 1 to 6, in the illustrated embodiment, the electromagnetic system 100 further includes a magnetism isolating ring 170, and the magnetism isolating ring 170 is disposed between the upper iron core 132 and the magnetic conductive plate 140.

As shown in fig. 1 to 6, in the illustrated embodiment, the electromagnetic system 100 is an integral module and is integrally mounted into the lower receiving chamber of the housing 10.

As shown in fig. 1 to 6, in the illustrated embodiment, the case 10 has a cylindrical shape, and the electromagnetic relay further includes a bottom cover 30, the bottom cover 30 being mounted on the bottom opening of the case 10 to close the bottom opening.

As shown in fig. 1 to 6, in the illustrated embodiment, a pair of coupling ears 12 protruding outward are formed on the outer circumferential wall near the bottom of the housing 10, and second coupling holes 12a are formed on the coupling ears 12, so that the housing 10 can be fixed by a coupling member passing through the second coupling holes 12 a.

The utility model aims to solve the technical problem that a high-voltage direct-current relay with simple structure and low cost is designed to realize effective and reliable arc extinction, reduce arcing time and reduce abrasion transfer of relay contact materials and prolong the service life of the relay; the difference from the prior art is that:

1): a circular electromagnetic system is adopted, so that the product can occupy smaller space, and the compact installation is convenient for customers;

2): the creepage distance between the main loop and the auxiliary loop of the product is longer than that of the existing product through the optimization of the internal structure design, and the insulating property of the product is better;

3): the arc extinguishing system adopts a unique magnetic blow mode, ensures the magnetic blow path to be larger under the condition of not increasing the volume of a product, and has advantages in arc extinguishing performance;

the high-voltage direct-current relay mainly comprises an electromagnetic system, a contact system, an arc extinguishing system and other modules. The electromagnetic system adopts a rotary electromagnetic system, structural components mainly adopt punch forming and simple machining, the cost is lower, the design is unique, rotary high-horsepower torque can be provided, and a strong energy storage counterforce system can be matched to ensure that the contact resistance of a contact system is low in contact reliability and the breaking speed is high, so that arc extinguishing is facilitated; the contact system mainly comprises a moving contact and a fixed contact, the on-off of a main loop is realized, the rotary contact system can ensure that the larger opening distance can obviously improve the withstand voltage and insulation strength of the body, and meanwhile, the rotary breaking of the contact system is stronger in magnetic blow capacity and can extinguish arc compared with the direct-acting breaking. The arc extinguishing system mainly comprises the arc extinguishing permanent magnet, different with current arc extinguishing permanent magnet mounting means, arrange the sound contact breaking point of contact system unilateral or both sides in, can make electric arc one-tenth like this and just can show to promote magnetism to blow the arc extinguishing intensity and compare in conventional magnetism and blow the arc extinguishing with being close the electro-magnet surface more, do not influence arc extinguishing performance to the nonpolar requirement of major loop electric current simultaneously, additional auxiliary contact module can effectual control contact system operating condition, can realize unusual operating mode warning.

The working principle of the high-voltage direct-current relay is that after an electromagnetic system is electrified and attracted, a moving contact and a static contact can be driven to be attracted, the main loop is connected, after the electromagnetic system is powered off, the moving contact of the contact system is rapidly reset under the action of a strong energy storage counter-force system, and the electric loop is reliably disconnected by means of permanent magnet strong magnetic blow-out arc extinction. The novel high-voltage direct-current relay can be provided with a mounting hole at the bottom or the side part for mounting and fixing the relay; electromagnetic system and auxiliary contact module are drawn forth through the lead wire, can reduce cost, make things convenient for the customer wiring or use the connector cooperation to use, and both mutual isolation do not influence each other. The bolts are matched with the main fixed contact (stamped terminal), so that the material cost of the relay can be reduced, and meanwhile, the contact area of the bolts with the top cover is large, so that the heat conduction of the terminal is facilitated, and the heat dissipation is facilitated.

It will be appreciated by those skilled in the art that the embodiments described above are exemplary and can be modified by those skilled in the art, and that the structures described in the various embodiments can be freely combined without conflict in structure or principle.

Although the present invention has been described in connection with the accompanying drawings, the embodiments disclosed in the drawings are intended to exemplify preferred embodiments of the present invention, and should not be construed as limiting the present invention.

Although a few embodiments of the present general inventive concept have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the general inventive concept, the scope of which is defined in the claims and their equivalents.

It should be noted that the word "comprising" does not exclude other elements or steps, and the words "a" or "an" do not exclude a plurality. Additionally, any element numbers of the claims should not be construed as limiting the scope of the invention.

Claims (24)

1. An electromagnetic relay comprising:

the shell (10) is provided with a partition plate (11), and the internal space of the shell (10) is divided into an upper accommodating chamber and a lower accommodating chamber by the partition plate (11);

a top cover (20) mounted on the top opening of the housing (10) to close the top opening; and

a contact system mounted in an upper receiving chamber of the housing (10) and comprising a main contact (211, 212) and an auxiliary contact (221, 222),

the method is characterized in that:

a main static contact (211) of the main contacts (211, 212) is fixed to the top cover (20), and the auxiliary contacts (221, 222) are fixed to the partition plate (11) so as to increase the distance between the main contacts (211, 212) and the auxiliary contacts (221, 222) in the height direction and the creepage distance between the main contacts and the auxiliary contacts.

2. An electromagnetic relay according to claim 1, characterized in that:

the contact system also comprises a rotating part (230), and two ends of the rotating part (230) are respectively and rotatably arranged on the partition plate (11) and the top cover (20);

an active contact (212) of the main contacts (211, 212) is mounted on the rotating member (230), the rotating member (230) being adapted to drive the active contact (212) to move between a closed position in contact with the main stationary contact (211) and an open position separated from the main stationary contact (211).

3. An electromagnetic relay according to claim 2, characterized in that:

the auxiliary contacts (221, 222) comprise an auxiliary fixed contact (221) and an auxiliary movable contact (222) fixed to the partition plate (11);

when the main contacts (211, 212) are in the closed position, the auxiliary movable contact (222) is in electrical contact with the auxiliary fixed contact (221) by virtue of the elastic deformation force of the auxiliary movable contact;

when the main contacts (211, 212) are in the open position, the rotating member (230) overcomes the elastic deformation force of the auxiliary moving contact (222) to push the auxiliary moving contact (222) to a position separated from the auxiliary fixed contact (221).

4. An electromagnetic relay according to claim 3, characterized in that:

a pushing piece (231) is arranged on the rotating piece (230), and the pushing piece (231) is suitable for pushing the auxiliary movable contact (222) to move.

5. An electromagnetic relay according to claim 3, characterized in that:

the electromagnetic relay further comprises two auxiliary contact external connecting wires (221b, 222b), wherein the two auxiliary contact external connecting wires (221b, 222b) extend into the shell (10) and are respectively and electrically connected with the auxiliary fixed contact (221) and the auxiliary moving contact (222).

6. An electromagnetic relay according to claim 5, characterized in that:

a first enclosing structure (10b) for enclosing the two auxiliary contact external leads (221b, 222b) is formed on the inner wall of the housing (10) so that the two auxiliary contact external leads (221b, 222b) are isolated from other components in the housing (10).

7. An electromagnetic relay according to claim 1, characterized in that:

the main contacts (211, 212) comprise two main fixed contacts (211), and the electromagnetic relay further comprises two external bolts (211b) which are respectively electrically connected with the two main fixed contacts (211) and fixed on the top cover (20);

a vertical partition wall (21) is formed on the outer surface of the top cover (20), and the two external bolts (211b) are positioned on both sides of the vertical partition wall (21) and are separated by the vertical partition wall (21).

8. An electromagnetic relay according to claim 7, characterized in that:

the vertical partition wall (21) is perpendicularly intersected with a plane defined by the center lines of the two circumscribed bolts (211b), and the intersection line of the two circumscribed bolts is the center line of the top cover (20).

9. An electromagnetic relay according to claim 2, characterized in that:

the electromagnetic relay further comprises a magnetic quenching system mounted in an upper receiving chamber of the housing (10), the magnetic quenching system comprising:

an insulating holder (240) fixed in the housing (10); and

a permanent magnet (250) mounted on the insulating base (240),

the permanent magnet (250) is adjacent to the main fixed contact (211) and is used for extinguishing electric arcs between the main fixed contact (211) and the active contact (212) in a magnetic blowing mode.

10. An electromagnetic relay according to claim 9, characterized in that:

a through hole allowing the rotation member (230) to pass therethrough is formed on the insulating base (240), and a permanent magnet installation chamber in which the permanent magnet (250) is fitted is formed on an upper surface of the insulating base (240).

11. An electromagnetic relay according to claim 2, characterized in that:

the electromagnetic relay further comprises an electromagnetic system (100), wherein the electromagnetic system (100) is accommodated in the lower accommodating chamber of the shell (10) and is used for driving the rotating piece (230) to rotate so as to drive the active contact (212) to move between the closed position and the open position.

12. An electromagnetic relay according to claim 11, characterized in that:

electromagnetic system (100) includes coil skeleton (121) and magnetic conduction board (140), electromagnetic relay still includes a plurality of threaded connection spare (160), a plurality of threaded connection spare (160) will coil skeleton (121) or magnetic conduction board (140) are connected and are fixed to on division board (11), thereby will electromagnetic system (100) are fixed to on casing (10).

13. An electromagnetic relay according to claim 12, characterized in that:

a plurality of first threaded holes (141) are formed in the magnetic conductive plate (140), and a plurality of first connection holes (11b) corresponding to the plurality of first threaded holes (141) are formed in the partition plate (11);

the plurality of screw connectors (160) respectively pass through the plurality of first connection holes (11b) and are respectively screwed into the plurality of first screw holes (141), thereby connecting and fixing the magnetic conductive plate (140) to the partition plate (11).

14. An electromagnetic relay according to claim 13, characterized in that:

a plurality of column-shaped first protruding parts (11a) extending downwards are formed on the bottom surface of the partition plate (11), and the first protruding parts (11a) are abutted against the magnetic conduction plate (140), so that an accommodating space is formed between the partition plate (11) and the magnetic conduction plate (140).

15. An electromagnetic relay according to claim 14, characterized in that:

the plurality of first connection holes (11b) are formed on a plurality of first bosses (11a) of the partition plate (11), respectively.

16. An electromagnetic relay according to claim 12, characterized in that:

a plurality of second screw holes (121b) are formed in the bobbin (121), and a plurality of first connection holes (11b) corresponding to the second screw holes (121b) are formed in the partition plate (11);

the plurality of screw-threaded connectors (160) pass through the plurality of first connection holes (11b) and are screw-threaded into the plurality of second screw holes (121b), respectively, thereby connecting and fixing the coil bobbin (121) to the partition plate (11).

17. An electromagnetic relay according to claim 16, characterized in that:

a plurality of column-shaped second protrusions (121a) extending upwards are formed on the top surface of the bobbin (121), and the second protrusions (121a) are abutted against the bottom surface of the partition plate (11), so that an accommodating space is formed between the partition plate (11) and the bobbin (121);

the magnetic conductive plate (140) is accommodated in an accommodation space between the partition plate (11) and the bobbin (121), and is fixed to the bobbin (121).

18. An electromagnetic relay according to claim 17, characterized in that:

the second screw holes (121b) are formed in the second bosses (121a) of the bobbin (121).

19. The electromagnetic relay according to claim 13 or 17, characterized in that the electromagnetic system (100) further comprises:

a yoke (110), the coil bobbin (121) being mounted inside the yoke (110);

a coil (122) wound around the cylindrical body of the bobbin (121);

a lower core (131) housed in a lower portion of the cylindrical body of the bobbin (121) and fixed to the yoke (110);

an upper iron core (132) having a lower portion housed in an upper portion of the cylindrical body of the bobbin (121) and an upper portion passing through the magnetic conductive plate (140); and

an armature (150) located in an accommodation space between the separation plate (11) and the bobbin (121) and fixed to the upper core (132),

the upper iron core (132) can rotate around the central axis of the cylindrical main body of the coil bobbin (121), and is connected with the lower end of the rotating part (230) to drive the rotating part (230) to rotate.

20. An electromagnetic relay according to claim 19, characterized in that:

electromagnetic relay still includes coil binding post (122a) and coil external conductor (122b), coil binding post (122a) are fixed on coil skeleton (121), coil external conductor (122b) stretch into the last accommodation chamber of casing (10) indoor and with coil binding post (122a) electricity is connected.

21. An electromagnetic relay according to claim 20, characterized in that:

a second enclosing structure (10a) for enclosing the coil terminal (122a) and the coil external lead (122b) is formed on the inner wall of the case (10) such that the coil terminal (122a) and the coil external lead (122b) are isolated from other components within the case (10).

22. An electromagnetic relay according to claim 12, characterized in that:

the electromagnetic system (100) is an integral module and is integrally mounted in the lower receiving chamber of the housing (10).

23. An electromagnetic relay according to claim 1, characterized in that:

the case (10) is cylindrical, and the electromagnetic relay further includes a bottom cover (30), the bottom cover (30) being mounted on a bottom opening of the case (10) to close the bottom opening.

24. An electromagnetic relay according to claim 1, characterized in that:

a pair of outwardly projecting coupling ears (12) are formed on the outer peripheral wall near the bottom of the housing (10), and second coupling holes (12a) are formed on the coupling ears (12) so that the housing (10) can be fixed by a coupling member passing through the second coupling holes (12 a).

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