CN114256030A

CN114256030A - Relay with a movable contact

Info

Publication number: CN114256030A
Application number: CN202011008893.6A
Authority: CN
Inventors: 姚保同; 陆涛; 汪鲁建; 刘斯源
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2020-09-23
Filing date: 2020-09-23
Publication date: 2022-03-29

Abstract

The invention discloses a relay, comprising: the mounting shell is internally limited with a mounting cavity; a fuse assembly; two main stationary contacts; an active contact; a drive shaft; the first access end and the second access end; the first detection device is used for detecting a first conduction state between the first access end and the second access end; the auxiliary contact assembly comprises an auxiliary movable contact and an auxiliary fixed contact, the auxiliary movable contact is arranged on the driving shaft and moves between a first position and a second position along with the driving shaft, and when the main movable contact is in contact with the main fixed contact, the auxiliary movable contact is positioned at the first position and is in contact with the auxiliary fixed contact; and the second detection device is used for detecting the second conduction state of the auxiliary contact assembly. According to the relay, whether the relay has a fault or not can be judged and the fault type can be determined according to the first conduction state of the first detection device and the second conduction state of the second detection device, so that the fault of the relay can be timely processed, and potential safety hazards can be reduced.

Description

Relay with a movable contact

Technical Field

The invention relates to the technical field of electrical equipment, in particular to a relay.

Background

The relay is a high-voltage and high-power supply switching-on and switching-off device, and the problem of short circuit can occur in the use process of the relay, and the short circuit can cause the problems of overlarge load current or circuit sintering and the like in the use process of the relay, so that the product loses functions and causes use faults.

However, in the related art, it is difficult to accurately determine whether the relay fails and the type of the relay failure, so that timely handling of the relay failure cannot be realized, and the potential safety hazard is large.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a relay, which can judge whether the relay has a fault and determine the fault type according to the first conduction state of the first detection device and the second conduction state of the second detection device, so that the fault of the relay can be timely processed, and potential safety hazards can be reduced.

The relay according to the embodiment of the present invention may include: the mounting shell is internally limited with a mounting cavity; a fuse assembly; the two main static contacts penetrate through the mounting shell at intervals; the active contact is movably arranged in the mounting cavity; a driving shaft for driving the active contact to be in contact with or separated from the main stationary contact; the safety assembly comprises a first access end, a second access end and a safety component, wherein the first access end and the second access end are used for accessing an external circuit, and when the main movable contact is in contact with the main fixed contact, the safety component, the main fixed contact and the main movable contact are connected in series between the first access end and the second access end; the first detection device is used for detecting a first conduction state between the first access end and the second access end; an auxiliary contact assembly including an auxiliary movable contact and an auxiliary stationary contact, the auxiliary movable contact being disposed on the drive shaft and movable with the drive shaft between a first position and a second position, the auxiliary movable contact being in the first position and in contact with the auxiliary stationary contact when the main movable contact is in contact with the main stationary contact; when the main movable contact is separated from the main fixed contact, the auxiliary movable contact is positioned at a second position and separated from the auxiliary fixed contact; and the second detection device is used for detecting the second conduction state of the auxiliary contact assembly.

According to the relay provided by the embodiment of the invention, through the arrangement of the first detection device, the auxiliary contact assembly and the second detection device, whether the relay has a fault or not can be judged and the fault type can be determined according to the first conduction state of the first detection device and the second conduction state of the second detection device, so that the fault of the relay can be timely processed, and the potential safety hazard can be reduced.

In some embodiments of the present invention, the auxiliary movable contact is an elastic member, and a distance L1 between the auxiliary movable contact and the auxiliary stationary contact is smaller than a distance L2 between the active contact and the main stationary contact when the auxiliary movable contact is located at the second position.

In some embodiments of the present invention, a step portion is provided on an outer side wall of the mounting housing, and the auxiliary stationary contact is disposed on the step portion in a penetrating manner.

In some embodiments of the invention, the relay comprises: two first arc suppression magnets, the fuse subassembly is located between two first arc suppression magnets.

In some embodiments of the present invention, a notch portion is provided on an outer side wall of the mounting case, the notch portion defines an avoidance space, and at least a part of the first arc extinguishing magnet is located in the avoidance space.

In some embodiments of the present invention, a first partition plate is disposed in the mounting housing, the first partition plate divides the mounting cavity into a first cavity and a second cavity, the safety assembly includes two safety members disposed in the first cavity at intervals, the two main stationary contacts penetrate through the first partition plate at intervals, the two safety members are respectively connected between the two main stationary contacts and the first and second access ends, and the main contact is movably disposed in the second cavity.

In some embodiments of the invention, the relay comprises: two first arc extinction magnet, two first arc extinction magnet corresponds first cavity sets up, two the insurance piece is located two between the first arc extinction magnet, two second arc extinction magnet arrange along the first direction and with the second cavity corresponds the setting, two the driving contact is located two between the second arc extinction magnet, two first arc extinction magnet arranges along the second direction, first direction with the second direction is perpendicular.

In some embodiments of the invention, two first arc suppression magnets are disposed opposite the first and second cavities simultaneously.

In some embodiments of the invention, the fuse comprises: the connecting section is connected with the main static contact; the mounting structure comprises a first mounting section and a second mounting section, wherein one end of the first mounting section and one end of the second mounting section are respectively connected with the mounting shell, and the other ends of the first mounting section and the second mounting section are respectively connected with two ends of the connecting section.

In some embodiments of the invention, the connecting section, the first mounting section and the second mounting section are an integrally formed piece.

In some embodiments of the invention, the relay further comprises: an outer casing, the mounting shell and the drive shaft both being located within the outer casing.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

FIG. 1 is a perspective view of a relay according to one embodiment of the present invention;

fig. 2 is a front perspective cross-sectional view of a relay according to one embodiment of the present invention;

fig. 3 is a side perspective cross-sectional view of a relay according to one embodiment of the invention;

FIG. 4 is a front plan cross-sectional view of a relay according to one embodiment of the invention;

fig. 5 is a side plan sectional view of a relay in accordance with one embodiment of the present invention, with the auxiliary movable contact in a second position;

FIG. 6 is an exploded schematic view of a relay according to one embodiment of the invention;

FIG. 7 is a schematic diagram of a partial explosion at another angle of a relay according to an embodiment of the invention;

fig. 8 is a partial schematic structural view of a relay according to an embodiment of the present invention, in which an outer casing is removed;

FIG. 9 is a schematic structural view of a first insulating housing according to one embodiment of the present invention;

FIG. 10 is a cross-sectional schematic view of FIG. 9;

fig. 11 is a schematic diagram showing the arrangement positions of the first arc extinguishing magnet, the enhancing magnet, the second arc extinguishing magnet and the fuse according to an embodiment of the present invention;

FIG. 12 is a schematic structural view of a mounting housing according to one embodiment of the present invention;

FIG. 13 is a front cross-sectional view of a mounting housing according to one embodiment of the invention;

FIG. 14 is a side cross-sectional view of a mounting housing according to one embodiment of the invention;

figure 15 is a schematic structural view of a fuse in accordance with one embodiment of the present invention;

fig. 16 is an exploded schematic view of a partial structure of a relay according to an embodiment of the present invention;

fig. 17 is a perspective view of a partial structure of a relay according to another embodiment of the present invention;

FIG. 18 is an exploded schematic view of FIG. 17;

fig. 19 is a schematic front view of a partial structure of a relay according to another embodiment of the present invention;

FIG. 20 is a side view according to FIG. 19;

FIG. 21 is a schematic diagram of the attractive forces of the first and second yokes according to another embodiment of the invention;

fig. 22 is a front plan sectional view of a relay according to another embodiment of the invention;

fig. 23 is a side plan sectional view of a relay according to another embodiment of the invention;

fig. 24 is a partial structural schematic view of a relay according to another embodiment of the present invention, in which an outer casing is removed;

FIG. 25 is a schematic structural view of a mounting housing according to another embodiment of the present invention;

FIG. 26 is a cross-sectional schematic view of FIG. 25;

fig. 27 is a schematic view showing the arrangement positions of the first arc extinguishing magnet, the enhancing magnet and the fuse according to another embodiment of the present invention;

fig. 28 is an arc extinguishing schematic diagram of a first arc extinguishing magnet and a booster magnet according to another embodiment of the present invention.

Reference numerals:

a relay 100;

mounting the housing 1; a first partition plate 11; a through hole 111; a first cavity 1 a; a second cavity 1 b; a first open mouth 1 c; a second open mouth 1 d; a retaining wall portion 12; a first segment 121; a second section 122;

a notch portion 12; an avoidance space 12 a; a step portion 121; mounting holes 122; a connecting and fixing hole 13; a positioning groove 14;

a second fixing groove 15; a second rib 16; a first yoke 17;

a fuse assembly 2; a fuse 2 a; a first connection section 21; a fitting hole 211; a positioning boss 212; a first mounting section 22; a first flange 221; a second mounting section 23; a second flange 231; a second fastening hole 234;

a main stationary contact 3; a terminal solder 31;

an active contact 4; the fitting projection 41; the second yoke 42; a bottom plate portion 421; a side plate portion 422; a mounting groove 423;

auxiliary contact assembly 5: an auxiliary moving contact 51; the auxiliary stationary contact 52;

a drive shaft 6;

a bracket portion 61; a support arm 611; a glide cavity 612; a mounting through-hole 613;

a shaft portion 62; an insulating member 63; a positioning member 631;

an elastic structure 632;

a glide structure 64; a chute 641; a first stopper wall 6411; a second stopper wall 6412; a slider 642;

a magnetic member 65;

a conductive connection pad 7; a first fastening hole 71; a first access terminal 7 a; a second access end 7 b;

a gasket 8;

an outer casing 9;

a first insulating case 91; a first fixing hole 911; a sand fill port 912; a seal 913;

a first fixing groove 914; a first rib 915; a snap fastener 916;

a second insulating case 92; a snap groove 921; mounting fastening holes 93;

a first threaded fastener 9 a; a second threaded fastener 9 b;

a first arc extinguishing magnet 101; a booster magnet 102; a second arc extinguishing magnet 103;

a joining table filler metal 201; an insulating cover 202; a protective gasket 203; a cushion washer 204; a connecting station 205; a retainer plate 206; a breather pipe 207; an outer arc chute 208;

a stopper 301; a limit hole 3011; a buffer spring 302; a sleeve 303; a skeleton 304; a coil 305;

a terminal 306; a bottom cover 307; an outer yoke 308; core pretension pad 309.

A first detecting device 40; a second detection device 50.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

The following disclosure provides many different embodiments, or examples, for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize the applicability of other processes and/or the use of other materials.

Referring to fig. 1 to 3, a relay 100 according to an embodiment of the present invention may include: the device comprises a mounting shell 1, a safety component 2, a main static contact 3, a main active contact 4, a driving shaft 6, a first access end 7a, a second access end 7b, a first detection device 40, an auxiliary contact component 5 and a second detection device 50. For example, the safety component 2 is made of a fuse wire, which may be a strip material such as copper, silver, or a silver-copper composite material, and when the current flowing through the safety component 2 exceeds a predetermined value, the safety component 2 is blown to break the corresponding electrical connection, so as to protect other electrical appliances in the circuit.

Referring to fig. 1, a mounting cavity is defined inside a mounting shell 1, a safety component 2 is arranged in the mounting cavity, two main stationary contacts 3 are arranged on the mounting shell 1 at intervals, an active contact 4 is movably arranged in the mounting cavity and located on a driving shaft 6, and the driving shaft 6 is used for driving the active contact 4 to be in contact with or separated from the main stationary contact 3.

Referring to fig. 1, the first and

second terminals

7a and 7b are used for connecting an external circuit, and when the active contact 4 contacts the main stationary contact 3, the safety component 2, the main stationary contact 3, and the active contact 4 are connected in series between the first and

second terminals

7a and 7b, wherein the first detecting device 40 is used for detecting a first conduction state between the first and

second terminals

7a and 7 b. It can be understood that, when the active contact 4 is in contact with the active contact 3, the first detection device 40 can detect that the first access terminal 7a and the second access terminal 7b are in the first conduction state; when the active contact 4 is separated from the active contact 3, the first detection device 40 can detect that the first access terminal 7a and the second access terminal 7b are in the first open state.

Referring to fig. 4 and 5, the auxiliary contact assembly 5 includes an auxiliary movable contact 51 and an auxiliary stationary contact 52, for example, the auxiliary movable contact 51 is provided on the driving shaft 6 and moves with the driving shaft 6 between a first position and a second position, the auxiliary movable contact 51 is located at the first position and contacts the auxiliary stationary contact 52 when the driving contact 4 is in contact with the main stationary contact 3, and the auxiliary movable contact 51 is located at the second position and is separated from the auxiliary stationary contact 52 when the driving contact 4 is separated from the main stationary contact 3.

Referring to fig. 3, the second detecting means 50 is used for detecting the second conducting state of the auxiliary contact assembly 5, and it can be understood that when the auxiliary movable contact 5 is located at the first position and contacts with the auxiliary stationary contact 52, the second detecting means 50 can detect that the auxiliary contact assembly 5 is in the second conducting state; when the auxiliary movable contact 5 is located at the second position and separated from the auxiliary stationary contact 52, the second detecting device 50 may detect that the auxiliary contact assembly 5 is in the second open state. For example, the second detecting device 50 may be connected to the auxiliary stationary contact 51 to detect the second conductive state of the auxiliary contact assembly 5.

Specifically, during the operation of the relay 100, when the second detection device 50 detects that the auxiliary contact assembly 5 is in the second conduction state, and the first detection device 40 detects that the first connection terminal 7a and the second connection terminal 7b are in the first conduction state, it can be determined that the relay 100 is normally operated at this time;

when the second detection device 50 detects that the auxiliary contact assembly 5 is in the second conduction state and the first detection device 40 detects that the first incoming end 7a and the second incoming end 7b are in the first disconnection state, it can be determined that the fuse assembly 2 is fused at this time;

when the second detection device 50 detects that the auxiliary contact assembly 5 is in the second off state and the first detection device 40 detects that the first connection end 7a and the second connection end 7b are in the first on state, it can be determined that the active contact 4 and the main stationary contact 3 are sintered at this time;

when the second detecting device 50 detects that the auxiliary contact assembly 5 is in the second open state and the first detecting device 40 detects that the first and

second terminals

7a and 7b are in the first open state, it can be determined that the relay 100 is normally operated. Therefore, in the working process of the relay 100, whether the relay 100 normally operates or not, whether the safety component 2 is fused or not and whether the main static contact 3 is sintered or not can be judged, so that the fault of the relay 100 can be timely processed, and potential safety hazards can be reduced.

In view of this, according to the relay of the embodiment of the present invention, by providing the first detecting device 40, the auxiliary contact assembly 5 and the second detecting device 50, it is possible to determine whether the relay 100 is faulty or not and determine the type of the fault according to the first conduction state of the first detecting device 40 and the second conduction state of the second detecting device 50, so that timely handling of the fault of the relay 100 can be achieved, which is beneficial to reducing potential safety hazards.

In some embodiments of the present invention, referring to fig. 5, the auxiliary movable contact 51 is a resilient member, for example, the auxiliary movable contact 51 may be a spring, and when the auxiliary movable contact 51 is located at the second position, a distance L1 between the auxiliary movable contact 51 and the auxiliary stationary contact 52 is smaller than a distance L2 between the active contact 4 and the main stationary contact 3. It can be understood that the electrical distance between the auxiliary moving contact 51 and the auxiliary stationary contact 52 is smaller than the electrical distance between the driving contact 4 and the main stationary contact 3, when the driving shaft 6 acts, the auxiliary contact loop where the second detecting device 50 is located is firstly conducted, and the main contact loop where the first detecting device 40 is located is then conducted, which is beneficial to ensure that the second detecting device 50 accurately monitors the contact or separation state of the driving contact 4 and the main stationary contact 3, and is beneficial to ensure the reliable operation of the relay 100.

In some embodiments of the present invention, referring to fig. 5 and 12, a step portion 121 is provided on an outer side wall of the mounting case 1, and the auxiliary stationary contact 52 is disposed on the step portion 121. Thus, the auxiliary stationary contact 52 is inserted into the step portion 121, which simplifies the structure and facilitates the mounting. For example, the step portion 121 is provided with a mounting hole 122, and the auxiliary stationary contact 52 is inserted into the mounting hole 122. Therefore, the structure is simple, and the installation is convenient.

In some alternative embodiments of the present invention, referring to fig. 5, step 121 is located at an end of mounting housing 1 remote from main stationary contact 3. Therefore, the creepage distance between the auxiliary contact assembly 5 and the main stationary contact 3 is favorably increased, and the working reliability of the auxiliary contact assembly 5 is favorably ensured.

As shown in fig. 5 and 12, in some specific examples, the step portion 121 is located at the bottom of the mounting case 1, and one end of the auxiliary stationary contact 52 is located inside the mounting case 1 and the other end is located outside the mounting case 1. Thus, on the one hand, it is beneficial to increase the creepage distance between the auxiliary contact assembly 5 and the main stationary contact 3, and to ensure the reliability of the operation of the auxiliary contact assembly 5, and on the other hand, it is convenient for the auxiliary stationary contact 52 to be connected to the second detection device 50.

In some embodiments of the invention, the relay 100 further comprises: two first arc extinguishing magnets 101, and the fuse assembly 2 is located between the two first arc extinguishing magnets 101. The opposite faces of the two first arc extinguishing magnets 101 have opposite polarities, so that the two first arc extinguishing magnets 101 can play a magnetic arc blowing role when the fuse component 2 is fused, and the extinguishing speed of the electric arc is accelerated. For example, as shown in fig. 28, two first arc extinguishing magnets 101 are provided at a distance in the first direction F1, and as shown in fig. 5 and 11, two first arc extinguishing magnets 101 are provided at a distance in the second direction F2.

Specifically, in some examples, referring to fig. 28, the securing assembly 2 includes two securing members 2a spaced apart in the F1 direction, two first arc-extinguishing magnets 101 spaced apart in the front-rear direction and located outside the mounting case 1, the N pole of the first arc-extinguishing magnet 101 located on the rear side faces the S pole of the first arc-extinguishing magnet 101 located on the front side, a magnetic field is formed between the two first arc-extinguishing magnets 101, the direction of the magnetic lines of force is from the N pole to the S pole, and when the main stationary contact 3 is in contact with the main contact 4, the two securing members 2a located between the two first arc-extinguishing magnets 101 are respectively passed through by electric current. According to the left-hand rule of electromagnetism: the left hand is unfolded to enable the thumb to be perpendicular to the rest four fingers and to be in the same plane with the palm center, the left hand is placed in a magnetic field, the magnetic induction line vertically penetrates through the palm center, the palm center faces to the N pole, the four fingers point to the direction pointed by the current, and the direction pointed by the thumb is the stress direction; if the fuse 2a generates an arc, the force applied is determined based on the left hand, and the direction of the magnetic field applied to the arc is respectively towards the left and right sides (as shown in fig. 28, the direction of the magnetic field applied to the fuse 3 located at the front side is towards the left, and the direction of the magnetic field applied to the fuse 3 located at the rear side is towards the right), so that the arc can be pulled to avoid the accumulation of the arc between the two fuses 2a, which is beneficial to accelerating the extinguishing speed of the arc and reducing the potential safety hazard.

In some alternative embodiments of the present invention, referring to fig. 12, a notch portion 12 is provided on an outer side wall of the mounting case 1, the notch portion 12 defines an avoidance space 12a, and at least a part of the first arc extinguishing magnet 100 is located in the avoidance space 12 a. Here, it is understood that at least a part of the first arc extinguishing magnet 100 is located in the escape space 12a, that a part of the first arc extinguishing magnet 100 is located in the escape space 12a, or that the entire first arc extinguishing magnet 100 is located in the escape space 12 a. This makes it possible to make the structure between the first arc extinguishing magnet 100 and the mounting case 1 compact, which is advantageous in reducing the space occupation.

In some alternative embodiments of the present invention, referring to fig. 2, a step portion 121 is formed on the notch portion 12, and the auxiliary stationary contact 52 is inserted on the step portion 121. For example, part of the outer side wall of the mounting case 1 is recessed inward to form a notch portion 12, and the top of the notch portion 12 is opened. Therefore, the notch portion 12 can perform an avoiding function for the installation of the auxiliary stationary contact 52, and is convenient for the auxiliary stationary contact 52 to be inserted into the step portion 121, and the structure is simple and the installation is convenient.

In some examples of the present invention, referring to fig. 14, the opposite side wall of the mounting case 1 is also formed with a notch portion 12, two auxiliary stationary contacts 52 are provided, the two auxiliary stationary contacts 52 are respectively provided on the two step portions 121, and the two leading ends of the auxiliary movable contact 51 are fitted with the two auxiliary stationary contacts 52 in a one-to-one correspondence. This is advantageous in reducing the mutual influence between the two auxiliary stationary contacts 52, and in improving the reliability of the operation of the auxiliary contact circuit. Alternatively, the two leading ends of the auxiliary moving contact 51 are integrally formed, and it can be understood that the integrally formed auxiliary moving contact 51 can not only stabilize the structure and performance of the two leading ends, but also be conveniently formed and simply manufactured.

Alternatively, in other examples of the present invention, two mounting holes 122 are provided on the step part 121, two auxiliary stationary contacts 52 are fitted into the two mounting holes 122 in a one-to-one correspondence, and the auxiliary movable contact 51 has two leading-out terminals, which are fitted into the two auxiliary stationary contacts 52 in a one-to-one correspondence. Therefore, the two auxiliary fixed contacts 52 and the auxiliary movable contact 51 are provided with two leading-out ends, so that the reliability of auxiliary contact loop detection is improved, the connection is convenient, and the installation cost is reduced.

In some embodiments of the present invention, referring to fig. 4 and 5, a first partition plate 11 is disposed in the mounting housing 1, the first partition plate 11 divides the mounting cavity into a first cavity 1a and a second cavity 1b, the safety assembly 2 includes two safety members 2a disposed in the first cavity 1a at intervals, two main stationary contacts 3 are disposed through the first partition plate 11 at intervals, and the two safety members 2a are respectively connected between the two main stationary contacts 3 and the first and second access ends 7a and 7 b. In other words, one of the securing members 2a is connected between the corresponding main stationary contact 3 and the first access terminal 7a, the other securing member 2a is connected between the corresponding main stationary contact 3 and the second access terminal 7b, and the active contact 4 is movably disposed in the second cavity 1 b.

For example, the first cavity 1a and the second cavity 1b are spaced apart in the up-down direction, the two safety members 2a are spaced apart in the first cavity 1a in the first direction (refer to the direction F1 in fig. 4, that is, the front-back direction), the first partition plate 11 is provided with a through hole 111, the main stationary contact 3 is disposed through the through hole 111 (refer to fig. 13), the upper end of the safety member 2 is connected to an external circuit through the conductive connecting piece 7, the lower end of the safety member 2 is connected to the main stationary contact 3, the relay 100 further includes a terminal solder 31, and the terminal solder 31 is formed in a ring shape and connected between the positioning cap of the main stationary contact 3 and the first partition plate 11, thereby facilitating improvement of reliability and sealing performance of connection between the main stationary contact 3 and the first partition plate 11.

Alternatively, as shown in fig. 6 and 7, the mounting case 1 may be a ceramic case, and the ceramic case may function as high-voltage insulation, so that the fuse 2, the main stationary contact 3, and other components in the relay 100 may be prevented from being damaged or broken down by the high voltage in the mounting case 1, thereby improving the safety and reliability of the relay 100.

It can be understood that the installation cavity is divided into the first cavity 1a and the second cavity 1b by the first partition 11, in other words, the first cavity 1a for placing the fuse element 2a and the second cavity 1b for placing the active contact 4 are integrated into a single structure, for example, as shown in fig. 4 and 5, the upper half of the relay 100 of the embodiment of the present invention is used as a fuse structure, and the lower half is used as a relay 100 structure, so that the present invention can realize that the high voltage relay and the high voltage fuse are highly integrated into one product, the high voltage relay and the fuse are connected in series, when in normal use, the relay 100 is used as a switch to switch on and off a high voltage circuit, when a short circuit or an overload current occurs in a loop, the fuse element 2a fuses, one product realizes the functions of two products, the overall size of which is equivalent to the size of the original one relay, the installation space is saved by 50%, connecting wires and fasteners between two devices are omitted, the problem that an insulating seat needs to be added when a traditional fuse is installed is solved, and the size, the weight, the safety, the cost and the like are optimized. In addition, the electrical control components such as the fuse component 2a and the active contact 4 are isolated from each other and do not interfere with each other, the fuse component 2a is easy to replace after being fused, the relay 100 can be repeatedly used, and the cost is further saved.

In some embodiments of the invention, as shown with reference to fig. 4 and 15, the fuse 2a comprises: connecting segment 21, first installation section 22 and second installation section 23, connecting segment 21 links to each other with main stationary contact 3, and the one end of first installation section 22 and the one end of second installation section 23 link to each other with installation shell 1 respectively, and the other end of first installation section 22 and the other end of second installation section 23 link to each other with the both ends of connecting segment 21 respectively. Therefore, the maximum current allowed by the fuse 2a can be increased to meet the requirement of the relay 100 for high current. For example, the first and second mounting

sections

22 and 23 may be spaced apart in a second direction (refer to a direction of F2 in fig. 5), the first direction being perpendicular to the second direction.

In some embodiments of the present invention, as shown in fig. 15, the connecting section 21, the first mounting section 22 and the second mounting section 23 are integrally formed pieces. It can be understood that, the structure of an organic whole not only can guarantee linkage segment 21, the structure of first installation section 22 and second installation section 23, the stability of performance, and convenient shaping, it is simple to make, and unnecessary assembly parts and connection processes have been saved, linkage segment 21 has been improved greatly, the assembly efficiency of first installation section 22 and second installation section 23, guarantee linkage segment 21, the reliability that first installation section 22 and second installation section 23 are connected, moreover, when insurance 2a is connected to installation shell 1, it comprises two parts to compare traditional insurance 2a, be favorable to improving the anti-vibration performance of insurance 2a, thereby improve the reliability of relay 100 work.

In some embodiments of the present invention, referring to fig. 7, 14 and 15, one end of the mounting shell 1 has a first open opening 1c, the first open opening 1c communicates with the first cavity 1a, the first mounting section 22 has a first flange 221 extending in a direction away from the second mounting section 23, the first flange 221 is connected to an end surface of one end of the mounting shell 1, and/or the second mounting section 23 has a second flange 231 extending in a direction away from the first mounting section 22, and the second flange 231 is connected to an end surface of one end of the mounting shell 1. Therefore, the contact area between the fuse 2a and the mounting shell 1 is increased, so that the connection reliability of the fuse 2a is enhanced, and meanwhile, the fuse 2a is electrically connected with the first access end 7a or the second access end 7b conveniently.

For example, the first mounting section 22 has a first flange 221 extending in a direction away from the second mounting section 23, and the first flange 221 is connected to an end face of one end of the mounting case 1; for another example, the second mounting section 23 has a second flange 231 extending toward the direction away from the first mounting section 22, the second flange 231 is connected to the end face of one end of the mounting shell 1, and for another example, as shown in fig. 15, the first mounting section 22 has a first flange 221 extending toward the direction away from the second mounting section 23, the first flange 221 is connected to the end face of one end of the mounting shell 1, and the second mounting section 23 has a second flange 231 extending toward the direction away from the first mounting section 22, and the second flange 231 is connected to the end face of one end of the mounting shell 1.

Referring to fig. 15, the first flange 221 and the second flange 231 may be detachably connected to the mounting case 1, as shown in fig. 15, the first flange 221 and the second flange 231 are both provided with a second fastening hole 234, and the second threaded fastener 9b passes through the second fastening hole 234 and is connected to the mounting case 1, but the invention is not limited thereto, and the first flange 221 and the second flange 231 may also be connected to the mounting case 1 by welding, such as brazing, resistance welding, etc.

In some embodiments of the invention, as shown with reference to fig. 4, the connecting section 21 is removably associated with the main stationary contact 3. For example, the connecting section 21 and the main stationary contact 3 may be connected by a snap-fit or threaded fastener. Thereby, the attachment and replacement of the securing element 2a is facilitated. For example, in some examples, the middle portion of the connecting section 21 is provided with a fitting hole 211 (shown in fig. 15), the first threaded fastener 9a passes through the fitting hole 211 to mount the connecting section 21 to the exposed portion of the top of the main stationary contact 3, and the portions of the securing member 2a on both sides of the fitting hole 211 are two segments having the same length, and the two segments bisect the withstand voltage value of the securing member 2 a. Of course, the present invention is not limited to this, and the connecting segment 21 may be fixedly connected to the end surface of the main stationary contact 3 by welding such as soldering or resistance welding.

In some embodiments of the present invention, one of the positioning protrusion 212 (see fig. 14) and the positioning groove 14 (see fig. 12) is provided on the mounting shell 1, the other of the positioning protrusion 212 and the positioning groove 14 is provided on the connecting section 21, and the positioning protrusion 212 is engaged with the positioning groove 14. In other words, the mounting shell 1 may be provided with the positioning protrusion 212, and the connecting section 21 may be provided with the positioning groove 14; or, the mounting shell 1 is provided with a positioning groove 14, and the connecting section 21 is provided with a positioning protrusion 212. It can be understood that, by the cooperation of the positioning protrusion 212 and the positioning groove 14, the contact area between the mounting shell 1 and the fuse 2a is increased, the reliability of the connection between the fuse 2a and the mounting shell 1 is improved, and when the fuse 2a is fused, the problem that the fused part is broken due to stress is avoided.

In some alternative embodiments of the present invention, as shown in fig. 12 and 14, a positioning groove 14 is provided on the mounting shell 1, one end of the mounting shell 1 away from the driving shaft 6 has a first open opening 1c, the positioning groove 14 extends to the first open opening 1c in the length direction of the driving shaft 6, a positioning protrusion 212 is provided on the connecting section 21, and the positioning protrusion 212 is in sliding fit with the positioning groove 14. It can be understood that the positioning protrusion 212 of the connecting section 21 can be installed to the positioning groove 14 through the first open hole 1c and slid to the installation position, so as to facilitate installation on the one hand, and on the other hand, by the cooperation of the positioning protrusion 212 and the positioning groove 14, the contact area between the mounting shell 1 and the safety element 2a can be increased, the reliability of connection between the safety element 2a and the mounting shell 1 can be improved, and at the same time, the rotation of the safety element 2a can be prevented when the safety element 2a is fixed through a threaded fastener.

For example, as shown in fig. 12 and 13, one end of the positioning groove 14 extends to the first open opening 1c of the mounting case 1, and the other end extends to the first partition plate 11. Therefore, the safety piece 2a is convenient to clamp into the positioning groove 14, and meanwhile, the safety piece 2a is beneficial to realizing reliable positioning.

In some alternative embodiments of the present invention, referring to fig. 11, the connecting segments 21 are provided with positioning protrusions 212, and the positioning protrusions 212 are provided on the side of the corresponding connecting segment 21 away from the other connecting segment 21. Therefore, the two safety parts 2a can be conveniently installed, and the structural layout of the two safety parts 2a in the installation shell 1 can be optimized.

In some alternative examples, referring to fig. 13, a blocking wall portion 12 is further disposed in the second cavity 1b, and the blocking wall portion 12 is disposed between the two main stationary contacts 3, so that electrical interference between the two main stationary contacts 3 can be reduced, which is beneficial to ensuring the reliability of the operation of the relay 100. For example, the retaining wall 12 is two and located between the two through holes 111, the retaining wall 12 may be substantially in an inverted U shape and includes a first section 121 and two second sections 122, the first section 121 is disposed on the bottom wall of the first partition 11, the two second sections 122 are respectively disposed on the opposite inner side walls of the second cavity 1b in the second direction F2, one end of each of the two second sections 122 is respectively connected to two ends of the first section 121, and the other end extends downward to the second open opening 1d at the bottom of the second cavity 1 b.

In some alternative embodiments of the present invention, as shown with reference to fig. 7 and 9, the outer casing 9 includes a first insulating case 91 and a second insulating case 92, the first insulating case 91 and the second insulating case 92 are connected to define a receiving space, the mounting case 1 and the driving shaft 6 are both located in the receiving space, a first open opening 1c of the mounting case 1 is disposed opposite to the first insulating case 91, a first access terminal (7a) and a second access terminal (7b) are embodied as conductive connecting pieces 7, each conductive connecting piece 7 is connected between the external circuit and the fuse 2a, and two conductive connecting pieces 7 are respectively connected to both sides of the first insulating case 91. For example, two conductive connection pads 7 are located above the mounting case 1 and are connected to the top wall of the first insulating case 91, respectively.

Therefore, the short circuit between the two conductive connecting sheets 7 can be prevented, and the reliability of the operation of the relay 100 can be ensured. In addition, the two conductive connecting sheets 7 can have no polarity, and the two main stationary contacts 3 can also have no polarity, so that the polarity of the whole product is not needed to be distinguished.

Optionally, referring to fig. 7 and 9, the first insulating shell 91 and the second insulating shell 92 are connected in a clamping manner, for example, a clamping buckle 916 is disposed on the first insulating shell 91, and a clamping groove 921 adapted to cooperate with the clamping buckle 916 is disposed on the second insulating shell 92, so as to facilitate the assembly and disassembly of the relay 100.

Further, referring to fig. 1, the outer casing 9 is further provided with a plurality of mounting fastening holes 93, and the outer casing 9 can be mounted on a corresponding device through the mounting fastening holes 93, so that the relay 100 can be reliably fixed, and the reliability of the operation of the relay 100 can be improved.

In some embodiments of the invention, as shown with reference to fig. 9, the two conductive tabs 7 are integral with the first insulating case 91. The conductive connection piece 7 is, for example, a metal piece. The first insulating shell 91 is formed between the two conductive connecting sheets 7 through injection molding, and the first opening 1c is covered by an integrated piece of the two conductive connecting sheets 7 and the first insulating shell 91. Therefore, the two conductive connecting sheets 7 can be insulated and fixed together, which is beneficial to enhancing the reliability of the connection between the two conductive connecting sheets 7 and the first insulating shell 91 and improving the overall strength of the conductive connecting sheets 7 and the first insulating shell 91.

Optionally, referring to fig. 7 and 9, the relay 100 further includes a gasket 8, the mounting case 1 is provided with a connection fixing hole 13, the gasket 8 is formed in a ring shape and provided at the first open end of the mounting case 1, each of the first flange 221 and the second flange 231 abuts against the gasket 8, a single piece of the two conductive connecting pieces 7 and the first insulating case 91 covers the first open end 1c of the mounting case 1, the first insulating case 91 is provided with a first fixing hole 911, the conductive connecting pieces 7 are provided with a first fastening hole 71, the first flange 221 and the second flange 231 are provided with a second fastening hole 234, and the second threaded fastener 9b penetrates through the first fixing hole 911, the first fastening hole 71 and the gasket 8 to be connected to the connection fixing hole 13 of the mounting case 1, so as to fix the first insulating case 91, the conductive connecting pieces 7 and the gasket 8 to the mounting case 1. Wherein, sealed pad 8 can be the high temperature resistant blotter of rubber class, sealed pad 8 can play sealed effect, and promote first turn-ups 221, the effect of the good contact between second turn-ups 231 and the corresponding conductive connection piece 7, be favorable to guaranteeing the reliability of insurance part 2a work, can avoid setting up the connection glue at the first turn-ups 221 of conductive connection piece 7 and the connection position of insurance part 2a and second turn-ups 231 simultaneously, high durability and convenient installation, be favorable to improving assembly efficiency.

In some examples, the first cavity 1a is filled with quartz sand, it can be understood that the quartz sand filled in the first cavity 1a can play a role in heat conduction, fixation and arc extinction, when the fuse 2a is fused, an electric arc will be generated, and a potential safety hazard and a risk of damaging elements are caused due to a high temperature of the electric arc, and the quartz sand filled in the first cavity 1a can play a role in rapid arc extinction, so that the risk is eliminated. It should be understood that the filling of the first cavity 1a with the quartz sand is only an embodiment of the present invention, and in other embodiments, other arc-extinguishing materials, such as arc-extinguishing gases, hydrogen, nitrogen, etc., may be filled, and the present invention is not limited thereto.

In some embodiments of the present invention, as shown in fig. 6 to 8, a sand filling hole 912 is formed on the first insulating case 91, the sand filling hole 912 is communicated with the first cavity 1a, and the relay 100 further includes a sealing member 913, and the sealing member 913 cooperates with the sand filling hole 912 to block the sand filling hole 912. The accessible fills quartz sand into first cavity 1a in sand filling hole 912, and after the completion of filling sand in first cavity 1a, through using sealing member 913 shutoff sand filling hole 912 in order to form sealed first cavity 1a to be favorable to preventing that quartz sand from spilling, be favorable to guaranteeing the reliability of relay 100 work.

In one example of the present invention, and referring to fig. 8-10, the sealing member 913 is a self-tapping screw, it should be understood that this is only an embodiment of the present invention, and in other embodiments, other sealing elements, such as rubber plugs, may be used, and the present invention is not limited thereto.

In some embodiments of the present invention, referring to fig. 11, the relay 100 includes two first arc extinguishing magnets 101 and two first arc extinguishing magnets 101, the two first arc extinguishing magnets 101 being disposed corresponding to the first cavity 1a, the two securing members 2a being located between the two first arc extinguishing magnets 101, the two second arc extinguishing magnets 103 being arranged in a first direction and being disposed corresponding to the second cavity 1b, the two driving contacts 4 being located between the two second arc extinguishing magnets 103, the two first arc extinguishing magnets 101 being arranged in a second direction, the first direction being perpendicular to the second direction. Therefore, the service life of the main stationary contact 3 and the service life of the main active contact 4 are prolonged by the arc extinction action of the second arc extinction magnet 103, and meanwhile, the first arc extinction magnet 101 and the second arc extinction magnet 103 are arranged in a staggered mode in the axial direction of the driving shaft 6, so that mutual influence is small, and the reliability of work of the first arc extinction magnet 101 and the second arc extinction magnet 103 is guaranteed.

For example, referring to fig. 11, the two second arc extinguishing magnets 103 are located outside the second cavity 1b, the N-pole of one of the second arc extinguishing magnets 103 faces the S-pole of the other second arc extinguishing magnet 103, an electromagnetic field is formed between the two second arc extinguishing magnets 103, the direction of the magnetic lines of force is always from the N-pole to the S-pole, and when the main stationary contact 3 is in contact with or separated from the active contact 4, current flows through the two main stationary contacts 3 provided between the two second arc extinguishing magnets 103.

Further, according to the left-hand rule of electromagnetism: the left hand is unfolded to enable the thumb to be perpendicular to the rest four fingers and to be in the same plane with the palm center, the left hand is placed in a magnetic field, the magnetic induction line vertically penetrates through the palm center, the palm center faces to the N pole, the four fingers point to the direction pointed by the current, and the direction pointed by the thumb is the stress direction; if electric arcs are generated at the moment of separating the main stationary contact 3 from the active contact 4 in the magnetic field, the stress of the electric arcs is determined on the basis of left-handed rules, so that the acting forces of the electric arcs in the gaps of the two groups of main contact components respectively face the left side and the right side, the electric arcs are prevented from being accumulated in the gaps, and the working reliability of the relay 100 is guaranteed.

In some embodiments of the present invention, as shown with reference to fig. 11, the relay 100 further includes a boost magnet 102, the boost magnet 102 being located between the first mounting section 22 and the second mounting section 23 to boost the magnetic field strength between the two first arc extinguishing magnets 101. Thus, by providing the reinforcing magnet 102, when the fuse 2a is fused, the magnetic field acting force to each fuse 2a can be increased, which is advantageous for further accelerating the extinguishing of the arc.

Further, referring to fig. 5, the first insulating cover 91 is provided with a first fixing groove 914, the first cavity 1a is provided with the reinforcing magnet 102, and the reinforcing magnet 102 is connected to the first fixing groove 914 in a clamping manner. Therefore, the limiting effect on the enhanced magnet 102 is improved, the enhanced magnet 102 is connected with the first fixing groove 914 in a clamping mode, the installation is convenient, and the cost is reduced.

For example, in some examples, as shown in fig. 5, the bottom wall of the first insulating case 91 is provided with a first fixing groove 914, and the top end of the reinforcing magnet 102 is adapted to be engaged with the first fixing groove 914. Optionally, two first ribs 915 arranged in parallel are disposed on the bottom wall of the first insulating cover shell 91, and the first fixing groove 914 is defined between the two first ribs 915 and the first insulating cover shell 91.

In other embodiments of the present invention, as shown with reference to fig. 22 and 23, the relay 100 includes two first arc extinguishing magnets 101, and the first arc extinguishing magnets 101 are disposed opposite to both the first chamber 1a and the second chamber 1 b. In other words, the first arc suppression magnet 101 extends in the arrangement direction of the first cavity 1a and the second cavity 1b, and is disposed opposite to the first cavity 1a and the second cavity 1b, respectively, so that the number of arc suppression magnets used can be reduced, which is beneficial to reducing the cost and facilitating the installation.

For example, referring to fig. 22 and 23, two first arc extinguishing magnets 101 are arranged spaced apart in a first direction, the first arc extinguishing magnets 101 extend in the up-down direction, the upper half portions of the first arc extinguishing magnets 101 are disposed opposite the securing members 2a to extinguish the securing members 2a, the lower half portions of the first arc extinguishing magnets 101 are disposed opposite the active contacts 4 and the main stationary contacts 3 to extinguish the active contacts 4 and the main stationary contacts 3, and the reinforcing magnet 102 is disposed between the two securing members 2a in the direction F1.

Further, as shown in fig. 22 to 24 and fig. 28, two first arc extinguishing magnets 101 are arranged at a distance in the first direction (refer to the direction of F1 shown in fig. 28), and the reinforcing magnet 102 is located between the two securing members 2 a. As shown in fig. 28, the polarity of the opposing surface of the enhancing magnet 102 and the first arc extinguishing magnet 101 is opposite. Therefore, when the fuse pieces 2a are fused, the magnetic arc blowing effect on each fuse piece 2a can be enhanced, the arc extinguishing is further accelerated, the structure is compact, and the occupied space is reduced.

Alternatively, referring to fig. 25 and 26, a second fixing groove 15 is formed on an inner sidewall of the first chamber 1a, and the reinforcing magnet 102 is adapted to be engaged with the second fixing groove 15. Optionally, the opposite inner side walls of the first cavity 1a in the second direction are respectively provided with a second fixing groove 15, two ends of the reinforcing magnet 102 are respectively matched with the two second fixing grooves 15 in a one-to-one correspondence manner, each of the opposite inner side walls is provided with two second protruding ribs 16 arranged in parallel, and the two second protruding ribs 16 and the corresponding inner side wall jointly define the second fixing groove 15.

Alternatively, as shown in fig. 8 and 24, two U-shaped outer arc extinguishing covers 208 are further provided in the first insulating housing 91, the two outer arc extinguishing covers 208 are connected to define an installation space, the two second arc extinguishing magnets 103 and the installation housing 1 are located in the installation space, and the two second arc extinguishing magnets 103 are located on the outer side of the installation housing 1 and are connected to the corresponding outer arc extinguishing covers 208 in a snap-fit manner, thereby further improving the reliability of the operation of the relay 100.

In some examples, the second cavity 1b is filled with an arc extinguishing gas such as hydrogen, which can prevent components such as the main stationary contact 3 in the relay 100 from being damaged or broken down due to the high voltage in the housing, thereby improving the safety and reliability of the relay 100.

Referring to fig. 4 and 16, the driving shaft 6 is movable relative to the mounting housing 1 in the axial direction of the driving shaft 6, one end of the driving shaft 6 in the axial direction has a bracket portion 61 at least partially protruding into the second cavity 1b, referring to fig. 7, the driving contact 4 and the bracket portion 61 are engaged by a sliding structure 64 so that the driving contact 4 is movable relative to the bracket portion 61 in the axial direction of the driving shaft 6 between a first position contacting the main stationary contact 3 (refer to the position where the driving contact 4 is located in fig. 21) and a second position away from the main stationary contact 3 (refer to the position where the driving contact 19 is located in fig. 21), the sliding structure 64 is provided on a side surface in the moving direction of the driving contact 4, referring to fig. 17 and 18, an elastic structure 632 is provided between the driving contact 4 and the bracket portion 61 to apply an elastic force to the driving contact 4 to move toward the first position. For example, as shown in fig. 18, the elastic member 632 is a spring, and the elastic member 632 always applies an upward force to the active contact 4.

Specifically, referring to fig. 5 and 16, when the relay 100 is in a normal operation mode (the fuse element 2 is not fused), when the driving shaft 6 drives the driving contact 4 to move toward the direction contacting the main stationary contact 3 to contact the main stationary contact 3, the movable contact and the main stationary contact 3 are electrically conducted, and the relay 100 is connected, at this time, due to the contact force between the driving contact 4 and the main stationary contact 3, the driving contact 4 moves to the second position, and the elastic structural member 632 is further compressed, so that the over travel is realized, and a large contact force is favorably maintained between the driving contact 4 and the main stationary contact 3; when the driving shaft 6 drives the driving contact 4 to move away from the main stationary contact 3 to be out of contact with the main stationary contact 3, as shown in fig. 19, the movable contact and the main stationary contact 3 are not conducted, the elastic member 632 returns to the first position, and the relay 100 is turned off.

It should be noted that, in the related art, a limiting portion is disposed on a side of the moving contact facing the main fixed contact to limit the moving contact from moving toward the main fixed contact, and the limiting portion occupies a space of the moving contact facing the main fixed contact and is blocked in the middle of the arc-extinguishing airflow to affect the arc-extinguishing effect, so that only a lateral arc-extinguishing mode can be adopted, and even if the lateral arc-extinguishing mode is used for arc-extinguishing, the backflow effect of the arc-extinguishing gas is poor due to the blocking of the limiting portion.

In the present invention, the sliding structure 64 is disposed on the side surface of the moving direction of the driving contact 4, so that the space on the side of the driving contact 4 facing the main stationary contact 3 is left free, and the arc-extinguishing airflow flows smoothly.

In some embodiments of the present invention, as shown in fig. 17 and 18, the sliding structure 64 includes a sliding groove 641 and a sliding block 642, the sliding groove 641 is formed on one of the bracket portion 61 and the active contact 4, the sliding groove 641 extends in the axial direction of the driving shaft 6, and both ends of the sliding groove 641 in the extending direction are a first stopper wall 6411 and a second stopper wall 6412 (see fig. 20), respectively, the sliding block 642 is provided on the other of the bracket portion 61 and the active contact 4, and the sliding block 642 is fitted to the sliding groove 641 to slide between the first stopper wall 6411 and the second stopper wall 6412 in the axial direction of the driving shaft 6. Therefore, the reliability of the movement of the driving contact 4 relative to the bracket part 61 between the first position and the second position along the axial direction of the driving shaft 6 is ensured, the structure is simple, and the production cost is low.

In some alternative embodiments of the present invention, as shown in fig. 17 and 18, the sliding groove 641 is formed on the bracket portion 61, the sliding block 642 is provided on the active contact 4, and the active contact is located at the first position when the elastic structural member 632 pushes the sliding block 642 to contact the first stopper wall 6411 (see fig. 20). From this, first backstop wall 6411 can restrict initiative contact 4 and continue to move towards main stationary contact 3, is favorable to guaranteeing the reliability of relay 100 work, compares traditional relay in addition, because the area of contact between sliding block 642 and the first backstop wall 6411 is little, when relay 100 disconnection, can reduce the striking noise that produces between support and the sliding block 642, is favorable to improving user's use experience.

For example, when the slide block 642 moves a certain distance from the first position toward being close to the second stopper wall 6412, the active contact 4 reaches the second position (refer to fig. 21), and in the second position, the slide block 642 is located between the first stopper wall 6411 and the second stopper wall 6412 and is spaced apart from the first stopper wall 6411 and the second stopper wall 6412, respectively, so that when the relay 100 is switched from the off state to the on state, the buffering effect of the elastic structural member 632 on the impact between the active contact 4 and the main stationary contact 3 can be ensured, the wear and deformation between the active contact 4 and the main stationary contact 3 can be reduced, and the service life of the relay 100 can be prolonged.

In some alternative embodiments of the present invention, referring to fig. 18 and 19, the bracket portion 61 has two supporting arms 611, the two supporting arms 611 are disposed opposite to each other, the two supporting arms 611 and the bracket portion 61 define a sliding cavity 612, a sliding groove 641 is formed on each supporting arm 611, the active contact 4 is located between the two supporting arms 611, and sliding blocks 642 are respectively disposed on two sides of the active contact 4 facing the two supporting arms 611. It can be understood that, by making the two sliding grooves 641 and the two sliding blocks 642 cooperate in a one-to-one correspondence, the reliability of the movement of the active contact 4 between the first position and the second position in the axial direction of the driving shaft 6 with respect to the bracket portion 61 is further ensured, and the structure of the bracket portion 61 is further simplified, which is beneficial to reducing the cost.

Referring to fig. 19, the relay 100 further includes: first yoke 17 and second yoke 42, first yoke 17 and second yoke 42 are located the both sides of initiative contact 4 respectively, and when initiative contact 4 was located the first position, magnetic attraction produced between first yoke 17 and the second yoke 42. Specifically, the first yoke 17 is located on the side of the active contact 4 facing the main stationary contact 3, the second yoke 42 is located on the side of the active contact 4 facing away from the main stationary contact 3, when the active contact 4 is located at the first position, the active contact 4 contacts two main stationary contacts 3 to conduct the corresponding main stationary contacts 3, a current passes through the active contact 4 to generate a magnetic field around the active contact 4, the first yoke 17 and the second yoke 42 are magnetized, and first yoke 17 and second yoke 42 magnetism is different, produces magnetic attraction between first yoke 17 and the second yoke 42, and second yoke 42 pushes away the repulsion that produces when propping active contact 4 with main stationary contact 3 to switch on in order to resist active contact 4 with main stationary contact 3 towards main stationary contact 3, improves the contact pressure between active contact 4 and the main stationary contact 3, makes the contact stability of active contact 4 and main stationary contact 3 improve, guarantees the job stabilization nature of relay 100.

Further, the surface of the inner surface of the second yoke 42 contacting the main stationary contact 3 has Al₂0₃And inorganic high-temperature-resistant and insulating binder coatings such as phosphate, the maximum magnetism gathering effect of the second magnetic yoke 42 is achieved, and the magnetic field reduction magnetism gathering effect caused by overcurrent on the second magnetic yoke 42 is avoided.

In some embodiments of the present invention, referring to fig. 4 and 5, the first magnetic yoke 17 is disposed in the second cavity 1b and spaced from the main stationary contact 3, the active contact 4 is mounted on the second magnetic yoke 42, the second magnetic yoke 42 is engaged with the bracket portion 61 through the sliding structure 64, and the elastic structural member 632 is stopped between the second magnetic yoke 42 and the bracket portion 61. For example, as shown in fig. 4, the top of the mounting case 1 is provided with two main stationary contacts 3 disposed at a distance, and the first yoke 17 is disposed in the second cavity 1b and between the two main stationary contacts 3.

It can be understood that when the relay 100 is in the on state, the active contact 4 and the main stationary contact 3 are electrically connected, for example, as shown in fig. 21, a current flows through the active contact 4 in an outward direction perpendicular to the plane, so that a magnetic field is generated around the active contact 4 in a counterclockwise direction, the active contact 4 is located between the first yoke 17 and the second yoke 42, the first yoke 17 and the second yoke 42 are magnetized, and the first yoke 17 and the second yoke 42 attract each other, since the first yoke 17 is fixed on the mounting case 1, the second yoke 42 is magnetically attracted by the first yoke 17 to push the active contact 4 toward the main stationary contact 3, so that the second yoke 42 provides a pressure to the active contact 4 toward the first yoke 17, effectively counteracts an electric contact repulsive force between the active contact 4 and the main stationary contact 3, and increases a contact pressure between the active contact 4 and the main stationary contact 3, so that the active contact 4 and the main stationary contact 3 are more stably contacted.

Alternatively, in some examples, first yoke 17 is welded to mounting case 1, the welding force between first yoke 17 and mounting case 1 is much greater than the electromagnetic force between active contact 4 and main stationary contact 3, and first yoke 17 is fixed with respect to mounting case 1. It can be understood that, compare in the correlation technique with first yoke 17 setting on active contact 4, can reduce active contact 4's weight, reduce relay 100's action voltage, promote action efficiency, simultaneously, first yoke 17 and second yoke 42's volume can be accomplished bigger, when relay 100 is in the on-state, be favorable to further making stable contact between active contact 4 and the main stationary contact 3, simultaneously, be favorable to improving first yoke 17 and second yoke 42's heat-sinking capability.

In some alternative embodiments of the present invention, as shown in fig. 21, the second yoke 42 includes a bottom plate portion 421 and two side plate portions 422, the two side plate portions 422 are oppositely disposed on two sides of the bottom plate portion 421, a mounting groove 423 is defined between the two side plate portions 422 and the bottom plate portion 421, the active contact 4 is located in the mounting groove 423, and one end of the active contact 4 facing the main stationary contact 3 is flush with one end of the side plate portions 422 facing the first yoke 17. From this, when the electricity is led to between main stationary contact 3 and the initiative contact 4, be favorable to increasing the magnetic conduction cross-section utilization ratio between first yoke 17 and the second yoke 42, simultaneously, be favorable to making first yoke 17 and second yoke 42 zero clearance contact, further increase the contact pressure between initiative contact 4 and the main stationary contact 3 for contact more steadily between initiative contact 4 and the main stationary contact 3.

Of course, the present invention is not limited thereto, and the end of the active contact 4 facing the main stationary contact 3 and the end of the side plate portion 422 facing the first yoke 17 may not be flush, in other words, the end of the active contact 4 facing the main stationary contact 3 may be beyond or below the end of the side plate portion 422 facing the first yoke 17, as long as it is ensured that the gap M between the first yoke 17 and the second yoke 42 is between 0-1mm when the electrical conduction between the active contact 4 and the main stationary contact 3 is established.

Further, as shown in fig. 21, when the electric conduction is performed between the active contact 4 and the main stationary contact 3, the gap M between the first yoke 17 and the second yoke 42 is zero, and thus, it is advantageous to further increase the utilization ratio of the magnetic conductive section between the first yoke 17 and the second yoke 42, so that the contact between the active contact 4 and the main stationary contact 3 is more stable.

In some examples, as shown in fig. 21, each of the side plate portions 422 is perpendicular to the bottom plate portion 421, and the second yoke 42 wraps the bottom surface and the two opposite side walls of the active contact 4, but the invention is not limited thereto, and the two side plate portions 422 may be inclined toward a direction close to the center of the active contact 4, so as to improve the reliability of the connection between the second yoke 42 and the active contact 4.

Alternatively, as shown in fig. 18, the active contact 4 is formed in a plate shape, both ends in the length direction of the active contact 4 protrude out of the mounting grooves 423, respectively, and both ends in the length direction of the active contact 4 are in contact with the two main stationary contacts 3, respectively, when the relay 100 is in the on state.

It can be understood that, because the first magnetic yoke 17 and the second magnetic yoke 42 of the present invention can have zero clearance, theoretical calculation shows that when the active contact 4 passes through a current a, the additionally increased pressure between the active contact 4 and the main stationary contact 3 can have N, which can effectively resist the repulsion force between the active contact 4 and the main stationary contact 3 during the short circuit process, and prevent the product failure caused by the bouncing and arcing of the active contact 4 and the main stationary contact 3 of the relay 100 during the short circuit. Meanwhile, when rated current passes through the relay 100, the increased contact pressure does not exceed N, and the normal breaking of the relay 100 is not influenced.

In some embodiments of the present invention, referring to fig. 18, one of the fitting protrusion 41 and the fitting groove (not shown) is provided on the active contact 4, the other of the fitting protrusion 41 and the fitting groove is provided on the bottom plate portion 421, and the fitting protrusion 41 is in interference fit with the fitting groove. Therefore, the reliability of the connection between the active contact 4 and the main stationary contact 3 is improved, and the structure is simple and easy to assemble. For example, the active contact 4 is provided with a fitting protrusion 41, the bottom plate portion 421 is provided with a fitting groove, and the fitting protrusion 41 and the fitting groove are connected by riveting.

In some embodiments of the invention, and as illustrated with reference to the figures, the drive shaft 6 further comprises: the shaft body 62 and the insulator 63, the insulator 63 is connected between the bracket 61 and the shaft body 62. Thus, the insulator 63 is provided to insulate the bracket from the shaft 62 in high and low voltages.

For example, as shown in fig. 16, the molded holder portion 61, the shaft body portion 62 and the auxiliary movable contact 51 may be connected and fixed together by injection molding, so as to improve the connection strength between the holder portion 61 and the shaft body portion 62, and it can be understood that the auxiliary movable contact 51 is connected to the insulating member 63 as shown in fig. 4 and 5.

In some embodiments of the present invention, referring to fig. 18 and 19, the bracket portion 61 is provided with a mounting through hole 613, the insulating member 63 is engaged with the mounting through hole 613, and a positioning member 631 is disposed at an end of the insulating member 63 away from the shaft portion 62 to position the elastic member 632. It can be understood that, by providing the positioning member 631 on the insulating member 63 to position the elastic structural member 632, the elastic structural member 632 is prevented from being displaced during the pressing process, and the reliability of the operation of the relay 100 is ensured.

For example, as shown in fig. 18 and 19, when assembling the elastic structure 632 and the active contact 4, the elastic structure 632 may be first installed in the bracket portion 61, then the riveted active contact 4 and the second yoke 42 are snapped into the bracket portion 61 so that the sliding block 642 is engaged with the sliding groove 641, and then both ends of the elastic structure 632 in the axial direction are respectively snapped into the positioning hole of the second yoke 42 and the positioning piece 631 on the insulating piece 63, at this time, the elastic structure 632 is in a compressed state, and the sliding block 642 is engaged with the first stopping wall 6411 by the elastic structure 632.

Further, in some examples, as shown in fig. 4 and 5, the other end of the driving shaft 6 is provided with a magnetic member 65 and a limiting member 301, a buffer spring 302 is provided between the magnetic member 65 and the limiting member 301, and both ends of the buffer spring 302 respectively abut against the magnetic member 65 and the limiting member 301. Thus, by providing the buffer spring 302 between the magnetic member 65 and the stopper 301, when the magnetic member 65 drives the driving shaft 6 to move, the buffer spring 302 needs to be elastically deformed against the elastic force of the buffer spring 302. When the electric connection between the driving contact 4 and the main stationary contact 3 is disconnected, the buffer spring 302 can push the magnetic member 65 and drive the driving shaft 6 to move towards the direction far away from the main stationary contact 3 under the action of the elastic restoring force, so that the operation is simple and the operation is stable.

Further, as shown in fig. 4 and 5, an outer side of the magnetic member 65 may be wound with a coil 305. It should be noted that the relay 100 may be driven electromagnetically, and by providing the magnetic member 65 at the other end of the driving shaft 6 and winding the coil 305 on the outer side of the magnetic member 65, the driving shaft 6 and the mounting case 1 may be driven to move relatively by the electromagnetic drive, so as to drive the driving contact 4 to communicate with the main stationary contact 3. Moreover, by arranging the limiting member 301, the movement stroke of the driving shaft 6 can be limited, the driving shaft 6 is prevented from moving too far, the damage of components in the relay 100 is avoided, and the stability and reliability of the operation of the relay 100 are improved.

In some examples, referring to fig. 6 and 7, the relay 100 further includes a connection pad solder 201, an insulating cover 202, a protection washer 203, a buffer washer 204, a connection pad 205, a supporting plate 206 and a vent pipe 207, the insulating cover 202 covers the open end of the lower end of the mounting case 1 and is connected to the mounting case 1, the connection pad 205 is connected to the open end of the bottom of the mounting case 1 through the connection pad solder 201, the supporting plate 206 is supported on the magnetic member 65, the vent pipe 207 is communicated with the second cavity 1b through the supporting plate 206, the driving shaft 6 extends into the second cavity 1b through the supporting plate 206, the connection pad 205 and the insulating cover 202, and the protection washer 203 and the buffer washer 204 are both sleeved on the driving shaft 6 to reduce collision and wear between the driving shaft 6 and the limiting member 301.

Alternatively, as shown in fig. 4 and 5, a limiting hole 3011 is formed on at least one of the limiting member 301 and the magnetic member 65, and the buffer spring 302 is located in the limiting hole 3011. That is, the stopper 301 may be provided with a stopper hole 3011, and the buffer spring 302 may be located in the stopper hole 3011. The magnetic member 65 may be provided with a stopper hole 3011, and the buffer spring 302 may be located in the stopper hole 3011. Thereby, the fixing assembly of the buffer spring 302 is facilitated, and the deviation of the buffer spring 302 when being pressed can be prevented, thereby improving the stability of the operation of the relay 100. For example, the limiting member 301 may be a static armature, and the magnetic member 65 may be a moving core.

In some examples, referring to fig. 6 and 7, the relay 100 further includes a sleeve 303, a bobbin 304, an outer yoke 308, and a core pre-tension pad 309, wherein the bobbin 304 is sleeved outside the sleeve 303, the outer side of the bobbin 304 is wound with a coil 305, the retaining member 301 and the magnetic member 65 are disposed inside the sleeve 303, the outer yoke 308 is formed in a U shape to define a U-shaped cavity, the bobbin 304 is located in the U-shaped cavity, and the core pre-tension pad 309 is connected between the outer yoke 308 and the inner bottom wall of the second insulating case 92, so that the reliability of mounting the outer yoke 308 and other components inside the second insulating case 92 can be improved.

In some embodiments of the present invention, as shown with reference to fig. 6 and 7, the relay 100 further includes: the outer casing 9, the mounting housing 1 and the drive shaft 6 are all located within the outer casing 9. Thus, by providing the outer cover 9, it is possible to further prevent foreign matters such as external dust and water from affecting the operation stability of the electric components inside the relay 100. For example, the outer casing 9 includes a first insulating shell 91 and a second insulating shell 92, a mounting cavity is defined between the first insulating shell 91 and the second insulating shell 92, the mounting shell 1 and the driving member are both arranged in the mounting shell 1, and the first insulating shell 91 is configured as a part of the upper cover, so as to further enhance the overall connection strength of the conductive connecting piece 7 and the outer casing 9.

In a specific example of the present invention, the relay 100 may be assembled by placing the assembled relay core (see fig. 8) into the second insulating housing 92, fastening the first insulating housing 91, fixing the first insulating housing 91 to the mounting housing 1 through the second threaded fastener 9b by using the first fixing hole 911 reserved in the first insulating housing 91, pressing the first flange 221 and the second flange 231 at the upper end of the securing member 2 between the conductive connecting piece 7 and the top wall of the mounting housing 1, filling quartz sand through the sand filling hole 912 reserved in the first insulating housing 91, compacting the sand, and sealing the sand filling hole 912 using the sealing member 913.

Other constructions of the relay 100, such as the terminals 306 and bottom housing 307, and operation thereof, according to embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A relay, comprising:

the mounting shell is internally limited with a mounting cavity;

a fuse assembly;

the two main static contacts penetrate through the mounting shell at intervals;

the active contact is movably arranged in the mounting cavity;

a driving shaft for driving the active contact to be in contact with or separated from the main stationary contact;

the safety assembly comprises a first access end, a second access end and a safety component, wherein the first access end and the second access end are used for accessing an external circuit, and when the main movable contact is in contact with the main fixed contact, the safety component, the main fixed contact and the main movable contact are connected in series between the first access end and the second access end;

the first detection device is used for detecting a first conduction state between the first access end and the second access end;

an auxiliary contact assembly including an auxiliary movable contact and an auxiliary stationary contact, the auxiliary movable contact being disposed on the drive shaft and movable with the drive shaft between a first position and a second position, the auxiliary movable contact being in the first position and in contact with the auxiliary stationary contact when the main movable contact is in contact with the main stationary contact; when the main movable contact is separated from the main fixed contact, the auxiliary movable contact is positioned at a second position and separated from the auxiliary fixed contact;

and the second detection device is used for detecting the second conduction state of the auxiliary contact assembly.

2. The relay according to claim 1, wherein the auxiliary movable contact is an elastic member, and a distance L1 between the auxiliary movable contact and the auxiliary stationary contact is smaller than a distance L2 between the main movable contact and the main stationary contact when the auxiliary movable contact is located at the second position.

3. The relay according to claim 1, wherein a step portion is provided on an outer side wall of the mounting case, and the auxiliary stationary contact is disposed on the step portion.

4. The relay according to claim 3, wherein said step is located at an end of the mounting housing remote from said main stationary contact.

5. The relay according to claim 1, comprising:

two first arc suppression magnets, the fuse subassembly is located between two first arc suppression magnets.

6. The relay according to claim 5, wherein a notch portion is provided on an outer side wall of the mounting case, the notch portion defining an avoidance space, at least a part of the first arc extinguishing magnet being located in the avoidance space.

7. The relay according to claim 1, wherein a first partition is disposed in the mounting housing, the first partition divides the mounting cavity into a first cavity and a second cavity, the safety assembly comprises two safety members disposed in the first cavity at intervals, the two main stationary contacts are disposed through the first partition at intervals, the two safety members are respectively connected between the two main stationary contacts and the first and second access ends, and the main contacts are movably disposed in the second cavity.

8. The relay according to claim 7, comprising:

the two first arc extinguishing magnets are arranged corresponding to the first cavity, and the two safety pieces are positioned between the two first arc extinguishing magnets;

two second arc extinction magnets, two the second arc extinction magnet arrange and with the second cavity corresponds the setting, two the driving contact is located two between the second arc extinction magnet, two first arc extinction magnet arranges along the second direction, first direction with the second direction is perpendicular.

9. The relay according to claim 7, comprising:

and the two first arc extinguishing magnets are arranged opposite to the first cavity and the second cavity at the same time.

10. The relay according to claim 7, wherein the fuse comprises:

the connecting section is connected with the main static contact;

the mounting structure comprises a first mounting section and a second mounting section, wherein one end of the first mounting section and one end of the second mounting section are respectively connected with the mounting shell, and the other ends of the first mounting section and the second mounting section are respectively connected with two ends of the connecting section.

11. The relay according to claim 10, wherein the connecting section, the first mounting section and the second mounting section are an integrally formed piece.

12. The relay according to any one of claims 1-11, further comprising:

an outer casing, the mounting shell and the drive shaft both being located within the outer casing.