CN112435895A

CN112435895A - High-capacity relay with auxiliary contacts

Info

Publication number: CN112435895A
Application number: CN202011413797.XA
Authority: CN
Inventors: 周康平
Original assignee: Churod Electronics Co ltd
Current assignee: Zhonghui Sensata Technology Wuhu Co ltd
Priority date: 2020-12-07
Filing date: 2020-12-07
Publication date: 2021-03-02
Also published as: WO2022121089A1

Abstract

The invention relates to the technical field of relays and discloses a high-capacity relay with an auxiliary contact and a stable structure, which comprises a shell, a push rod assembly and a sealing tube, wherein the top of the shell is provided with an incoming line static contact and an outgoing line static contact, and the bottom of the shell is provided with a magnetic conduction block; and the auxiliary contact subassembly, include the supplementary movable contact spring of insulating isolation with the moving contact and wear to establish at least a set of pole of drawing forth of casing lateral wall, supplementary movable contact spring includes that coaxial fixed sets up the mounting panel on the insulation board and sets up two supplementary movable contacts at the homonymy of mounting panel or heteronymy, the pole is drawn forth including m root to every group, m is 2 or 3, the middle part of drawing forth the pole is along drawing forth the radial extension of pole and forming annular boss, seted up on the casing through the metallization treatment, be used for wearing to establish to draw forth the pole and with annular boss complex weld part.

Description

High-capacity relay with auxiliary contacts

Technical Field

The invention relates to the technical field of relays, in particular to a high-capacity relay with reliable auxiliary contacts and a stable structure.

Background

The relay is an electric control device which makes the controlled quantity generate a predetermined step change in an electric output circuit when the change of the input quantity (excitation quantity) reaches the specified requirement, and is composed of a control system (also called an input circuit) and a controlled system (also called an output circuit) which are interactively matched, and plays the roles of automatic regulation, safety protection, circuit conversion and the like in the circuit. With the rise of green energy, high capacity relay is widely used in high voltage direct current loads such as on-vehicle, photovoltaic and charging pile, and in view of the above-mentioned application scenario of high voltage direct current load, often need set up the auxiliary contact and monitor the state of main contact and carry out low pressure coordinated control to promote security and the reliability that electrical equipment used.

The traditional relay realizes the monitoring of the main contact mainly by adding a group of auxiliary contacts on the top of the ceramic cavity, has a simpler structure, but has poor high-low load isolation effect because the main contact and the auxiliary contacts are simultaneously distributed on the top of the ceramic; when the main contact breaks the load, the electric arc is easy to jump to the auxiliary contact, so that high and low loads are communicated, even the auxiliary contact is burnt, and potential safety hazards exist; metal particles splashed by the main contact easily pollute the auxiliary contact, and the reliability of the auxiliary contact cannot be ensured; the switch logic of the auxiliary contact of the structure is single, and the auxiliary contact is synchronously switched on and off with the main contact, so that the action under the opposite logic is difficult to realize; the auxiliary contact of the structure is single in form and only has a normally-open structure, so that the requirement of the relay on the normally-closed auxiliary contact is difficult to meet; the size of the auxiliary contacts is large, only one group of auxiliary contacts can be arranged at the top of the ceramic cavity, and when a plurality of groups of auxiliary contacts need to be arranged, the size of the relay structure is increased, and the structure is complex; in addition, the auxiliary contact of traditional relay draws forth the pole and is made by metal material, sets up kovar alloy through the position of treating the connection on the casing, will draw forth the pole welding and realize drawing the installation and electrically conductive of pole at this kovar alloy position, when adopting this kind of connected mode, it is great to draw the stress that the pole received, easily drops from the casing when receiving external force impact, and then causes the relay performance unstable to influence the reliability of relay, be unfavorable for promoting the market competition of product.

Disclosure of Invention

In view of the above, it is necessary to provide a high-capacity relay with reliable auxiliary contacts and stable structure, in view of the disadvantages of the conventional high-capacity relay.

A high-capacity relay with auxiliary contacts, the high-capacity relay with auxiliary contacts comprising:

the top of the shell is respectively provided with an incoming line static contact used for being connected with current by an external power supply device and an outgoing line static contact used for transmitting the current to external electrical equipment in a penetrating manner, and the bottom of the shell is provided with a magnetic conduction block;

the push rod assembly comprises an insulating plate accommodated in the inner cavity of the shell and abutted against the magnetic conduction block, a push rod fixedly connected with the insulating plate and a moving contact elastically connected with the push rod, and the moving contact is accommodated in the inner cavity of the shell and can move relative to the inner wall of the shell along the height direction of the shell;

the sealing tube is covered with the push rod, the top of the sealing tube is welded with the boss at the bottom of the magnetic conduction block, and a movable iron core is accommodated in the sealing tube and used for pushing the push rod to move;

the auxiliary contact assembly comprises an auxiliary movable spring plate insulated and isolated from the movable contact and at least one group of leading-out rods penetrating through the side wall of the shell, the auxiliary movable spring plate comprises an installation plate coaxially and fixedly arranged on the insulation plate and two auxiliary movable contacts arranged on the same side or different sides of the installation plate, each group of leading-out rods comprises m leading-out rods, and m is 2 or 3;

when the two auxiliary moving contacts are positioned on the opposite side of the mounting plate, when m is 2, two leading-out rods in each group of leading-out rods respectively penetrate through one side wall of the shell and are correspondingly matched with one auxiliary moving contact; when m is 3, one leading-out rod in each group of leading-out rods penetrates through one side wall of the shell and is matched with one auxiliary moving contact, and the other two leading-out rods in each group of leading-out rods penetrate through the same side wall, different from the side wall where the previous leading-out rod is located, of the shell and are arranged along the height direction of the shell to form a limiting part for limiting the movement range of the other auxiliary moving contact on the auxiliary moving contact;

when the two auxiliary moving contacts are positioned on the same side of the mounting plate, when m is 2, two leading-out rods in each group of leading-out rods penetrate through the same side wall of the shell and are correspondingly matched with one auxiliary moving contact; when m is 3, three leading-out rods in each group of leading-out rods penetrate through the same side wall of the shell, one leading-out rod is matched with one auxiliary moving contact, and the other two leading-out rods are arranged along the height direction of the shell and form a limiting part for limiting the movement range of the other auxiliary moving contact on the auxiliary moving contact;

the middle part of the leading-out rod extends along the radial direction of the leading-out rod to form an annular boss, and the shell is provided with a welding part which is subjected to metallization treatment and used for penetrating the leading-out rod and is matched with the annular boss;

the push rod pushes the moving contact to move under the action of the movable iron core so as to switch on and off the incoming line static contact and the outgoing line static contact, and drives the auxiliary movable spring to contact or leave the leading-out rod so as to form a switch-on loop or a switch-off loop.

In one embodiment, when two auxiliary moving contacts are located on different sides of the mounting plate, the two auxiliary moving contacts are adjacent or opposite.

In one embodiment, when the two auxiliary moving contacts are located on the same side of the mounting plate, the two auxiliary moving contacts are contact pieces independently arranged on the mounting plate or two contact points arranged on a conductive plate of the mounting plate respectively.

In one embodiment, the welding part is a circular hole with a metalized inner surface or comprises a through hole arranged in the shell and a welding boss arranged at the outer edge of the through hole, one surface of the welding boss, which faces away from the inner cavity of the shell, is metalized, and the side surface of the annular boss is in welding fit with the inner surface of the circular hole or one surface of the annular boss, which is close to the shell, is in welding fit with the metalized surface of the welding boss.

In one embodiment, the annular boss is provided with a sinking groove, and the outer annular surface of the sinking groove is in welding fit with the inner surface of the round hole or the outer plane of the notch of the sinking groove is in welding fit with the metalized surface of the welding boss. .

In one embodiment, when the welding part comprises a through hole arranged on the shell and a welding boss arranged on the outer edge of the through hole, the notch of the sinking groove faces the inner cavity of the shell.

In one embodiment, when the welding part is a round hole with a metalized inner surface, the notch of the sinking groove faces or faces away from the inner cavity of the shell.

In one embodiment, when the number of the leading-out rods is two or more, each leading-out rod is arranged on the same side wall or a plurality of side walls of the shell.

In one embodiment, when m is 2, the distance from the leading-out rod to the bottom of the sealing tube is less than the distance from the auxiliary moving contact to the bottom of the sealing tube.

In one embodiment, when m is 2, the distance from the leading-out rod to the bottom of the sealing tube is greater than the distance from the auxiliary moving contact to the bottom of the sealing tube.

According to the high-capacity relay with the auxiliary contacts, the incoming line static contact and the outgoing line static contact, namely the main contact, are arranged at the top of the shell, the plurality of outgoing rods are arranged on two opposite inner side walls of the shell, and the auxiliary movable spring is matched with the push rod, so that the push rod adjusts the on-off relation between the auxiliary movable spring and the outgoing rods while controlling the action of the movable contact, an operator can conveniently judge the connection condition of the incoming line static contact and the outgoing line static contact according to monitoring equipment connected with the outgoing rods, namely judge the working state of the relay, high and low voltage loads are isolated due to the fact that the auxiliary movable spring is isolated from the movable contact in an insulating mode, and the distance between the main contact and the auxiliary contact assembly is increased. The main contact and the auxiliary contact assembly are respectively arranged on the top of the shell and the side wall of the shell, so that the creepage distance and the air distance are increased, the isolation effect of high and low loads is improved, the influence or damage of electric arcs generated in the working process of the main contact on the auxiliary contact assembly is avoided, the use safety and reliability of the relay are improved, and the service life of the relay is prolonged; by arranging one or more groups of leading-out rods and setting the position relation of each group of leading-out rods, the number and the matching mode of the auxiliary contacts can be selected according to the requirements of users so as to meet the use requirements; the auxiliary contact assembly is arranged on the side wall of the shell, so that the occupied area is small, the volume of a product cannot be increased, and the adaptability of the size of the relay to general electrical equipment is improved; in addition, set up annular boss through the middle part at drawing forth the pole, increased and drawn forth the welding area between pole and the weld part, be favorable to reducing the stress of drawing forth pole and casing welding position, promoted and drawn forth stability and the leakproofness that pole and casing are connected, and then guaranteed the reliability of relay monitoring, be favorable to promoting the market competition of product.

Drawings

FIG. 1 is a schematic diagram of a high capacity relay in one embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of the high capacity relay in the embodiment of FIG. 1;

FIG. 3 is an exploded view of the high capacity relay of the embodiment of FIG. 1;

FIG. 4 is a schematic diagram of a high capacity relay in another embodiment of the present invention;

FIG. 5 is a schematic structural view of a housing according to an embodiment of the present invention;

FIG. 6 is a schematic view of the embodiment of FIG. 5 showing the structure of the exit rod;

fig. 7 is a schematic cross-sectional view of a high capacity relay according to another embodiment of the present invention;

fig. 8 is a schematic structural view of a pull-out rod according to yet another embodiment of the present invention.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

Referring to fig. 1 to 3 together, the present invention provides a high capacity relay 10 with auxiliary contacts and a stable structure, wherein the high capacity relay 10 includes a housing 100 having an incoming static contact 110 and an outgoing static contact 120 penetrating through the top thereof and a magnetic conductive block 130 disposed at the bottom thereof; the push rod assembly 200 is composed of a movable contact 210 which is accommodated in the inner cavity of the shell 100 and can move relative to the inner wall of the shell 100 along the height direction of the shell 100, a push rod 220 which is elastically connected with the movable contact 210 and is used for pushing the movable contact 210 to act, and an insulating plate 230 which is accommodated in the inner cavity of the shell 100, is fixedly connected with the push rod 220 and is abutted against the magnetic conduction block 130; the push rod 220 is covered and arranged, the top of the push rod is welded with a boss at the bottom of the magnetic conduction block 130, and the inner cavity of the push rod is provided with a sealing tube 300 for accommodating a movable iron core 400 used for pushing the push rod 220 to move; and the auxiliary contact assembly 500, the auxiliary contact assembly 500 includes an auxiliary movable spring 510 insulated and isolated from the movable contact 210 and at least one group of leading-out rods 520 penetrating through the side wall of the housing 100, the auxiliary movable spring 510 includes an installation plate 511 coaxially and fixedly arranged on the insulation plate 230 and two auxiliary movable contacts 512 arranged on the same side or different sides of the installation plate 511, each group of leading-out rods 520 includes m leading-out rods 520, m is 2 or 3, the push rod 220 pushes the movable contact 210 to move under the action of the movable iron core 400 to make and break the incoming line static contact 110 and the outgoing line static contact 120, and drives the auxiliary movable spring 510 to contact or leave the leading-out rods 520, so as to form a circuit connection or a circuit disconnection.

The middle part of the leading-out rod 520 extends along the radial direction of the leading-out rod 520 to form an annular boss 521, and the casing 100 is provided with a welding part which is metalized, used for penetrating the leading-out rod 520 and matched with the annular boss 521. Set up annular boss 521 through the middle part at drawing pole 520, increased and drawn the welding area between pole 520 and the welding part, be favorable to reducing the stress of drawing pole 520 and casing 100 welding part, promoted and drawn stability and leakproofness that pole 520 and casing 100 are connected, and then guaranteed the reliability of relay 10 monitoring.

When the two auxiliary moving contacts 512 are located on opposite sides of the mounting plate 511, the two auxiliary moving contacts 512 are adjacent or opposite. That is, two auxiliary movable contacts 512 may be provided on both sides of the mounting plate 511, or may be provided on adjacent sides of the mounting plate 511, to improve flexibility in the positional arrangement of the lead-out bars 520, so that the structure of the relay 10 is adapted to the shape of the electrical appliance. Referring to fig. 4, when m is 2, no matter two auxiliary movable contacts 512 are adjacent or opposite, two leading-out rods 520 in each group of leading-out rods 520 respectively penetrate through one side wall of the housing 100 and are correspondingly matched with one auxiliary movable contact 512, that is, one leading-out rod 520 is respectively arranged on any two side walls of the housing 100. When m is 3, one leading-out rod 520 in each group of leading-out rods 520 penetrates through one side wall of the shell 100 and is matched with one auxiliary movable contact 512, and the other two leading-out rods 520 in each group of leading-out rods 520 penetrate through the same side wall, different from the side wall where the previous leading-out rod 520 is located, of the shell 100 and are arranged along the height direction of the shell 100, so that a limiting part for limiting the movement range of the other auxiliary movable contact 512 on the auxiliary movable spring 510 is formed; that is, it can be understood that one extraction rod 520 is provided on one side wall of the housing 100, and two extraction rods 520 are provided on any one side wall other than the side wall.

When the two auxiliary moving contacts 512 are located on the same side of the mounting plate 511, when m is 2, two leading-out rods 520 in each group of leading-out rods 520 penetrate through the same side wall of the housing 100 and are correspondingly matched with one auxiliary moving contact 512; when m is 3, three lead-out rods 520 of each group of lead-out rods 520 penetrate through the same side wall of the housing 100, one lead-out rod 520 is matched with one auxiliary movable contact 512, and the other two lead-out rods 520 are arranged along the height direction of the housing 100 and form a limiting part for limiting the movement range of the other auxiliary movable contact 512 on the auxiliary movable contact 510. It is to be understood that when m is 3, the auxiliary contact assembly 500 includes at least one set of switching-type auxiliary contacts. It should be noted that the height direction of the housing 100 in the present embodiment is a direction from the top of the housing 100 to the bottom of the housing 100, and other embodiments can be explained with reference to this. Through setting up two supplementary movable contact 512 homonymies on mounting panel 511, it is corresponding, two or three poles 520 of drawing forth of pole 520 of every group also wear to establish the same lateral wall of casing 100 simultaneously and cooperate with the supplementary movable contact 512 that corresponds, draw forth the homonymy that pole 520 set up on casing 100 promptly, so, when carrying out the metallization operation to the weld part that is used for wearing to establish pole 520, can accomplish the metallization and coat the operation at same process, reduce the operation process, and be convenient for mechanical automation operation, be favorable to promoting the production efficiency of relay 10.

The housing 100 is used to isolate an arc generated when the incoming line static contact 110 and the outgoing line static contact 120 are conducted through the movable contact 210 from an external environment, so as to improve the safety of the use of the relay 10. In one embodiment, the casing 100 includes a ceramic casing 150 and a transition block 160 connected to the opening of the ceramic casing 150 by high temperature brazing, and the magnetic conducting block 130 is mounted at the bottom of the outer surface of the transition block 160. The ceramic cover 150 is used to block the burning of the inner surface of the housing 100 by the metal spatters generated by the arc, so as to further improve the safety of the use of the relay 10. The magnetic conduction block 130 is made of a ferromagnetic material and is used for isolating the housing 100 from the sealing tube 300, so that the electric arc generated in the process of switching on and off the incoming static contact 110 and the outgoing static contact 120 is prevented from influencing the operation of the movable iron core 400, and the reliability of the operation of the relay 10 is improved.

The incoming static contact 110 is used for receiving current from an external power supply device, and the outgoing static contact 120 is used for transmitting current to an external electrical device, and both of them are used as a main contact of the high-capacity relay 10 of this embodiment, and can be regarded as a wire for connecting the relay 10 with a load circuit and an external power supply, so as to implement connection or disconnection of the circuit. In an embodiment, the incoming static contact 110 and the outgoing static contact 120 are respectively connected with the ceramic housing 150 of the housing 100 by high temperature brazing, so as to improve the structural stability of the relay 10, and prevent the problem that the incoming static contact 110 and the outgoing static contact 120 are respectively in poor contact with the moving contact 210 when the incoming static contact 110 and the outgoing static contact 120 shake due to external force impact, in addition, the incoming static contact 110 and the ceramic housing 150, and the outgoing static contact 120 and the ceramic housing 150 are connected by high temperature brazing, so that the sealing performance of the housing 100 is improved, the problem of gas leakage filled in the housing 100 during the use process of the relay 10 can be effectively avoided, and the reliability of the operation of the relay 10 is ensured.

The insulation plate 230 is used to mount the auxiliary movable reed 510 on the push rod 220 and to realize insulation isolation of the auxiliary movable reed 510 from the push rod 220. In one embodiment, the insulating plate 230 is made of plastic, for example, the insulating plate 230 may be made of high temperature nylon PA6T or PA 10T.

The auxiliary movable spring 510 is used for contacting or leaving the leading-out rod 520 under the driving of the push rod 220 so as to switch on or off the monitoring equipment connected with the leading-out rod 520, and thus, an operator can judge the on-end condition of the relay 10 by detecting the working state or parameters of the equipment. It should be noted that in the present embodiment, the auxiliary movable spring 510 is isolated from the movable contact 210, so that a high voltage end formed by the incoming line static contact 110 and the outgoing line static contact 120 can be isolated from a low voltage end formed by the auxiliary contact assembly 500, and an arc generated when the movable contact 210 is communicated with the incoming line static contact 110 and the outgoing line static contact 120 is prevented from moving to the auxiliary contact assembly 500, so as to improve the safety of the relay 10 and ensure the reliability of state monitoring performed by the auxiliary contact assembly 500.

In one embodiment, when the two auxiliary moving contacts 512 are located on the same side of the mounting plate 511, the two auxiliary moving contacts 512 are contacts independently disposed on the mounting plate 511 or two contacts disposed on a conductive plate of the mounting plate 511. In other words, one side of the mounting plate 511 is bifurcated with two auxiliary moving contacts 512, or two auxiliary moving contacts 512 are integrally provided on one conductive plate of the mounting plate 511, to achieve flexible design of the auxiliary moving spring 510.

The outlet rod 520 is used for being electrically connected with a monitoring device and used for sending state information inside the relay 10 to an external monitoring device so as to master state parameters inside the relay 10. Specifically, when m is 2, one of the two outlet bars 520 is electrically connected to the power supply device, and the other outlet bar 520 is connected to the external electrical device or the control device. When the distance from the leading-out rod 520 to the bottom of the sealing tube 300 is less than the distance from the auxiliary moving contact 512 to the bottom of the sealing tube 300, the auxiliary contact assembly 500 is in a normally closed structure; when the distance from the withdrawing rod 520 to the bottom of the sealing tube 300 is greater than the distance from the auxiliary moving contact 512 to the bottom of the sealing tube 300, the auxiliary contact assembly 500 is a normally open structure. Specifically, the movable iron core 400 has no acting force on the push rod 220 when not excited, the push rod 220 drives the auxiliary movable spring 510 to move towards the direction close to the bottom of the housing 100 in a natural state, so that the movable contact 210 is disconnected from the main contact, when the auxiliary contact assembly 500 is in a normally closed structure, the auxiliary movable spring 510 is electrically connected with the leading-out rod 520 respectively, or when the auxiliary contact assembly 500 is in a normally open structure, the auxiliary movable spring 510 is disconnected from the leading-out rod 520 respectively, so that the connection relationship between the movable contact 210 and the main contact of the relay 10 can be judged according to the working state of external electrical equipment or control equipment, and the working state of the relay 10 is evaluated. In the actual design, the assembly relationship of the auxiliary contact assembly 500 may be combined according to the use scenario of the relay 10, for example, when the auxiliary contact assembly 500 includes two sets of auxiliary contact units, the auxiliary contact unit may be any combination of two sets of normally open auxiliary contact units, two sets of normally closed auxiliary contact units, two sets of switching auxiliary contact units, and three types of auxiliary contact units, which is not described herein again.

In one embodiment, when there are two or more sets of the extraction rods 520, each extraction rod 520 is disposed on the same sidewall or multiple sidewalls of the housing 100. That is, a plurality of auxiliary moving contacts 512 may be provided only at one side of the mounting plate 511, or a plurality of auxiliary moving contacts 512 may be provided at one side of the mounting plate 511, and a different number of auxiliary moving contacts 512 may be provided at the other side of the mounting plate 511, and at the same time, a soldering portion may be provided on the case 100 corresponding to the position of the auxiliary moving contact 512 and a lead bar 520 may be provided, so as to implement a diversified design of contact forms and positions, so as to enrich the monitoring method of the relay 10.

Referring to fig. 3 and fig. 5-8, in an embodiment, the welding portion is a circular hole 140 with a metalized inner surface or includes a through hole formed in the housing 100 and a welding boss 141 disposed at an outer edge of the through hole, a surface of the welding boss 141 facing away from the inner cavity of the housing 100 is metalized, a circumferential surface of the annular boss 521 is in welding fit with the inner surface of the circular hole 140, or a surface of the annular boss 521 near the housing 100 is in welding fit with a surface of the welding boss 141 that is metalized. Preferably, the surface of the welding boss 141 facing away from the shell 100 or the inner surface of the circular hole 140 is coated with a molybdenum-manganese layer. That is, the leading-out rod 520 of the present invention can be welded to the housing 100 through a small hole or a boss, so as to enhance the connection strength between the leading-out rod 520 and the housing 100.

Further, in an embodiment, the annular protrusion 521 is provided with a sinking groove 522, an outer annular surface of the sinking groove 522 is in welding fit with an inner surface of the circular hole 140, or an outer plane of a notch of the sinking groove 522 is in welding fit with a surface of the welding protrusion 141 which is subjected to metallization treatment. The sunk groove 522 is formed in the annular boss 521, so that the welding part of the leading-out rod 520 is designed to be a thin-wall structure, the welding stress of the matching part of the leading-out rod 520 and the shell 100 is reduced, and the installation strength of the leading-out rod 520 on the shell 100 is improved.

It should be noted that, when the welding portion includes a through hole provided in the housing 100 and a welding boss 141 provided at an outer edge of the through hole, a notch of the sinking groove 522 faces the inner cavity of the housing 100; when the welding portion is the circular hole 140 with the metalized inner surface, the notch of the sink 522 faces or faces away from the inner cavity of the housing 100. Therefore, the proper leading-out rod 520 can be selected according to production conditions for assembly, so that the production and processing difficulty is reduced.

In the high-capacity relay 10 with the auxiliary contacts, the incoming line static contact 110 and the outgoing line static contact 120, namely the main contact, are arranged at the top of the shell 100, the plurality of outgoing rods 520 are arranged on two opposite inner side walls of the shell 100, and the auxiliary movable spring 510 is matched with the push rod 220, so that the push rod 220 adjusts the on-off relation between the auxiliary movable spring 510 and the outgoing rods 520 while controlling the action of the movable contact 210, an operator can conveniently judge the connection condition between the incoming line static contact 110 and the outgoing line static contact 120 according to monitoring equipment connected with the outgoing rods 520, namely the working state of the relay 10, and as the auxiliary movable spring 510 is isolated from the movable contact 210 in an insulating way, namely high and low voltage loads are isolated, and the distance between the main contact and the auxiliary contact assembly 500 is increased. The main contact and the auxiliary contact assembly 500 are respectively arranged at the top of the shell 100 and the side wall of the shell 100, so that the creepage distance and the air distance are increased, the isolation effect of high and low loads is improved, the influence or damage of electric arcs generated in the working process of the main contact on the auxiliary contact assembly 500 is avoided, the use safety and reliability of the relay 10 are improved, and the service life of the relay 10 is prolonged; by arranging one or more groups of leading-out rods 520 and setting the position relation of each group of leading-out rods 520, the number and the matching mode of the auxiliary contacts can be selected according to the requirements of users so as to meet the use requirements; the auxiliary contact assembly 500 is arranged on the side wall of the housing 100, so that the occupied area is small, the volume of a product cannot be increased, and the adaptability of the size of the relay 10 to general electrical equipment is improved; in addition, through set up annular boss 521 in the middle part of drawing pole 520, increased and drawn the welding area between pole 520 and the weld part, be favorable to reducing the stress of drawing pole 520 and casing 100 welding part, promoted and drawn the stability that pole 520 and casing 100 are connected, and then guaranteed the reliability of relay 10 monitoring, be favorable to promoting the market competition of product.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A high capacity relay with auxiliary contacts, comprising:

2. The high capacity relay according to claim 1, wherein when two of the auxiliary movable contacts are located on opposite sides of the mounting plate, the two auxiliary movable contacts are adjacent or opposite.

3. The high capacity relay according to claim 1, wherein when the two auxiliary moving contacts are located on the same side on the mounting plate, the two auxiliary moving contacts are contacts provided independently on the mounting plate or two contacts provided on a conductive plate of the mounting plate, respectively.

4. The high-capacity relay according to claim 1, wherein the welding portion is a circular hole with a metalized inner surface or comprises a through hole formed in the housing and a welding boss arranged at an outer edge of the through hole, one surface of the welding boss facing away from the inner cavity of the housing is metalized, and a ring side surface of the annular boss is in welding fit with the inner surface of the circular hole or one surface of the annular boss adjacent to the housing is in welding fit with one surface of the welding boss which is metalized.

5. The high-capacity relay according to claim 4, wherein the annular boss is provided with a sunken groove, and an outer annular surface of the sunken groove is in welding fit with an inner surface of the circular hole or a notch outer plane of the sunken groove is in welding fit with a metalized surface of the welding boss.

6. The high-capacity relay according to claim 5, wherein when the welding portion includes a through hole opened in the case and a welding boss provided on an outer edge of the through hole, a notch of the sink is directed toward an inner cavity of the case.

7. The high-capacity relay according to claim 5, wherein when the welded portion is a circular hole with a metalized inner surface, the notch of the sink is directed toward or away from the inner cavity of the case.

8. The high capacity relay according to any one of claims 1 to 7, wherein when there are two or more sets of the lead-out bars, each lead-out bar is provided on the same side wall or a plurality of side walls of the housing.

9. The high capacity relay according to any one of claims 1 to 7, wherein when m is 2, a distance from the extraction rod to the bottom of the hermetic tube is smaller than a distance from the auxiliary movable contact to the bottom of the hermetic tube.

10. The high capacity relay according to any one of claims 1 to 7, wherein when m is 2, a distance from the extraction rod to the bottom of the hermetic tube is greater than a distance from the auxiliary movable contact to the bottom of the hermetic tube.