CN218631837U

CN218631837U - Auxiliary contact device and high-voltage direct-current relay with same

Info

Publication number: CN218631837U
Application number: CN202222896654.XU
Authority: CN
Inventors: 范彬; 陶阳; 马芮; 陈建武; 许宏; 杨超群
Original assignee: Zhonghui Sensata Technology Wuhu Co ltd
Current assignee: Sensata Technology (Wuhu) Co.,Ltd.
Priority date: 2022-11-01
Filing date: 2022-11-01
Publication date: 2023-03-14
Anticipated expiration: 2032-11-01

Abstract

The utility model provides an auxiliary contact device and have auxiliary contact device's high voltage direct current relay, auxiliary contact device includes: a floating mechanism and an auxiliary contact mechanism; the floating mechanism includes: the linkage shaft sleeve and the floating shaft are linked with the movable iron core; one end of the floating shaft is arranged on the linkage shaft sleeve and is linked with the movable iron core through the linkage shaft sleeve; the auxiliary contact mechanism includes: the contact device comprises a cover body, an auxiliary contact and a movable reed, wherein the movable reed is arranged in the cover body; the other end of the floating shaft can penetrate through the cover body to push or depart from the movable spring plate when being linked with the movable iron core, so that the movable spring plate is contacted with or separated from the auxiliary contact in the cover body. The utility model discloses can improve relay auxiliary contact structure's reliability and life.

Description

Auxiliary contact device and high-voltage direct-current relay with same

Technical Field

The utility model relates to a relay field, in particular to auxiliary contact device and have auxiliary contact device's high voltage direct current relay.

Background

A relay is an electronic control device having a control system (also called an input loop) and a controlled system (also called an output loop), which is commonly used in automatic control circuits, and which is actually an "automatic switch" that uses a small current to control a large current. Therefore, the circuit plays the roles of automatic regulation, safety protection, circuit conversion and the like. The high-voltage direct-current relay is one of relays, and generally comprises a relay shell, two fixed contact moving contacts, a push rod, a moving iron core, a coil assembly, a counter-force spring for resetting the moving iron core, a contact spring for improving contact pressure and the like. When the coil assembly works, the movable iron core acts, the movable contact piece is driven to move through the push rod, two ends of the movable contact piece are in contact with the two fixed contacts, and a load loop is communicated. Chinese utility model patent with publication number CN209675208U discloses a relay, can also increase the contact pressure of relay on the basis of above-mentioned high voltage direct current relay basic function, has promoted the stability and the security of relay.

In order to further monitor the switch-on condition of the fixed contact, the high-voltage direct-current relay in the prior art further comprises: and the auxiliary contact can be used for monitoring the main contact loop. In the prior art, the auxiliary contacts may be disposed in the main contact seal chamber or the core seal chamber of the relay. The chinese utility model patent with publication number CN213366485U discloses a high voltage direct current relay with auxiliary contacts, the auxiliary contacts of the relay are arranged in the iron core sealing cavity, and include two auxiliary reeds located in the coil assembly, the two auxiliary reeds are respectively provided with leading-out terminals; along with the up-and-down movement of the movable iron core, the bottom of the movable iron core is contacted with or separated from the two auxiliary spring pieces so as to realize the on-off of the auxiliary contacts.

However, the size of the auxiliary contact structure of the relay in the prior art is very small, the auxiliary reed of the auxiliary contact structure gradually deforms along with the up-and-down movement of the movable iron core, and the service life of the auxiliary contact structure is very short.

SUMMERY OF THE UTILITY MODEL

The technical problem solved by the technical scheme of the utility model is that: how to improve the reliability and the life of relay auxiliary contact structure.

In order to solve the technical problem, the utility model provides a high voltage direct current relay with auxiliary contact device is provided, include: main contact device, electromagnet device, auxiliary contact device, main contact device includes: static contact and moving contact, electromagnet device includes: the static iron core, the movable iron core and the coil assembly; when the coil assembly is electrified, the electromagnet device can attract the movable iron core to the static iron core by utilizing the electromagnetic force generated by the coil assembly, so that the movable iron core moves from a first position to a second position; when the movable iron core is positioned at a first position, the static contact and the movable contact form a separated state; when the movable iron core is located at the second position, the static contact and the movable contact form a closed state; the auxiliary contact device includes: a floating mechanism and an auxiliary contact mechanism;

the floating mechanism includes: the linkage shaft sleeve and the floating shaft are linked with the movable iron core; one end of the floating shaft is arranged on the linkage shaft sleeve and is linked with the movable iron core through the linkage shaft sleeve;

the auxiliary contact mechanism includes: the contact device comprises a cover body, an auxiliary contact and a movable reed, wherein the movable reed is arranged in the cover body; the other end of the floating shaft can penetrate through the cover body to push or deviate from the movable spring plate when being linked with the movable iron core, so that the movable spring plate is contacted with or separated from an auxiliary contact in the cover body;

when the movable iron core moves from the first position to the second position, the floating shaft and the movable iron core are linked in the direction of attracting the movable iron core to the static iron core, and the floating shaft deviates from the movable spring piece so that the movable spring piece is separated from the auxiliary contact;

when the movable iron core moves from the second position to the first position, the floating shaft and the movable iron core are linked in the direction back to the static iron core, and the floating shaft pushes the movable spring plate to enable the movable spring plate to be in contact with the auxiliary contact.

Optionally, the floating mechanism further includes: a baffle plate; the floating shaft is provided with a limiting ring, and the linkage shaft sleeve comprises: the sleeve body is arranged in the center of the shaft sleeve, and the lip edge which is formed by extending the periphery of the sleeve body and can be fixed with the movable iron core is formed;

the top of the sleeve body is provided with a first sleeve opening, and the bottom of the sleeve body is provided with a second sleeve opening; the opening area of the first sleeve opening is larger than the cross section area of the floating shaft and the annular area of the limiting ring, so that the floating shaft and the limiting ring can movably penetrate through the first sleeve opening; the opening area of the second sleeve opening is larger than the section area of the floating shaft and smaller than the annular area of the limiting ring, so that one part of the floating shaft can movably penetrate through the second sleeve opening, but the limiting ring limits the other part of the floating shaft inside the sleeve body; when the floating shaft and the limiting ring pass through the first sleeve opening, one part of the floating shaft passes through the second sleeve opening, and the other part of the floating shaft is limited in the sleeve body by the limiting ring, the assembly of the floating shaft is completed;

the blocking area of the blocking piece is larger than the opening area of the first sleeve opening, and when the floating shaft is assembled, the blocking piece can be fastened with the sleeve body at the top of the sleeve body and used for blocking the floating shaft limited in the sleeve body.

Optionally, the floating mechanism further includes: a floating spring; the spring section area based on the outer diameter of the floating spring is smaller than the annular area of the limiting ring, the spring section area based on the inner diameter of the floating spring is larger than the section area of the floating shaft, and the free height of the floating spring is close to the inner height from the center point of a first sleeve opening to the center point of a second sleeve opening of the sleeve body;

the floating spring can be arranged in the sleeve body and sleeved on the floating shaft limited in the sleeve body, and the blocking piece is used for blocking the floating spring arranged in the sleeve body and the floating shaft limited in the sleeve body.

Optionally, a gap distance is formed between the part of the floating shaft limited in the sleeve body and the blocking piece, the floating spring is sleeved on the floating shaft in the sleeve body, one end of the floating spring abuts against the blocking piece, and the other end of the floating spring abuts against the limiting ring.

Optionally, the top of the sleeve body is provided with a positioning protrusion around the first sleeve opening, the blocking piece is provided with a through hole matched with the positioning protrusion for installation, and the blocking piece is riveted and matched with the through hole or fixed at the matched position by dispensing glue through the positioning protrusion when being fastened with the sleeve body.

Optionally, the lip limit is annular lip limit to be equipped with bonding arch, move the iron core and deviate from the one end of quiet iron core be equipped with the chamber that holds of annular lip limit adaptation, annular lip limit passes through bonding arch is fixed in move the iron core.

Optionally, the annular lip is formed by extending around the first cuff at the top of the sleeve body.

Optionally, the annular lip is formed by extending the lateral periphery of the sleeve body.

Optionally, the auxiliary contact mechanism further includes: the positioning device comprises a chassis, a positioning column and a positioning spring; one part of the auxiliary contact can be connected with an external auxiliary contact detection loop through the chassis, and the other part of the auxiliary contact does not pass through the chassis to be established on the chassis; the positioning column can movably penetrate through the movable reed and is arranged on the chassis; the positioning spring can be sleeved on the positioning column, one end of the positioning spring abuts against the movable reed, and the other end of the positioning spring abuts against the chassis, so that the movable reed and the auxiliary contact are in buffer contact when the floating shaft pushes the movable reed, and the movable reed and the auxiliary contact are gradually separated when the floating shaft deviates from the movable reed; the cover body can be installed with the chassis in a matched mode to contain the positioning column and the positioning spring.

Optionally, the movable spring is provided with an assembly hole matched with the positioning column; the positioning column can movably penetrate through the assembly hole of the movable spring leaf to be arranged on the base plate.

Optionally, one end of the positioning spring is fixedly connected with the movable spring plate, and the other end of the positioning spring is fixedly connected with the chassis.

Optionally, a convex hull or a groove is arranged at a position where the chassis abuts against the positioning spring, and the positioning spring is inserted into the convex hull or the groove for assembly.

Optionally, the cover includes: cover surface and cover wall; one end of the cover wall, which is far away from the cover surface, is provided with a cover edge which is matched and fixed with the chassis; the positioning column is arranged on the cover surface, and when the cover body is matched and fixed with the chassis through the cover edge, the positioning column is arranged on the chassis through the cover surface; the cover body can also accommodate an auxiliary contact which does not penetrate through the chassis, the cover surface is arranged facing the floating mechanism, and an opening is formed in the position, opposite to the center of the movable spring, of the cover surface; the floating shaft can extend into the cover body through the opening to push the movable spring plate.

Optionally, the cover surface is provided with a chip storage groove facing the floating mechanism.

Optionally, the chip storage groove is an annular groove.

Optionally, the cover surface and the cover wall are detachably assembled, the cover surface is disc-shaped, and the cover wall is tubular; the cover surface is provided with a plurality of cover surface bulges on the periphery, and one end of the cover wall close to the cover surface is provided with a plurality of positioning grooves and fixing clamping grooves matched with the cover surface bulges.

Optionally, the cover surface and the cover wall are detachably assembled, the cover surface is disc-shaped, and the cover wall is tubular; a plurality of cover surface bulges are arranged on the periphery of the cover surface, a plurality of positioning grooves matched with the cover surface bulges are arranged at one end of the cover wall close to the cover surface, and foldable groove walls are arranged between the positioning grooves; when the cover surface and the cover wall are assembled through the cover surface protrusions and the positioning grooves, the foldable groove wall is bent to limit the cover surface.

Optionally, the high voltage dc relay further includes: a metal housing; the electromagnet device and the auxiliary contact device are arranged in the metal shell, a metal hole is formed in a metal sheet at the bottom of the metal shell, and an auxiliary soldering lug can be arranged in the metal hole; the chassis is a ceramic cover and can be installed at the bottom of the metal shell in a matching way, and the chassis is provided with an installation hole corresponding to the metal hole; the auxiliary contact can penetrate through the chassis through the mounting hole and penetrate through the metal hole to be connected with an external auxiliary contact detection loop; the auxiliary contact can be soldered at the bottom of the metal shell through the auxiliary soldering lug so as to be fixedly arranged on the chassis.

Optionally, the high-voltage direct-current relay further includes: a metal housing; the electromagnet device and the auxiliary contact device are arranged in the metal shell, and the chassis is also used as the bottom of the metal shell; the chassis is provided with a mounting hole and can be provided with an auxiliary soldering lug; the auxiliary contact can penetrate through the chassis through the mounting hole to be connected with an external auxiliary contact detection loop; the auxiliary contact may be soldered to the chassis by the auxiliary solder tab.

In order to solve the technical problem, the utility model provides an auxiliary contact device is applicable to high-voltage direct-current relay, include: a floating mechanism and an auxiliary contact mechanism;

the floating mechanism includes: the linkage shaft sleeve and the floating shaft can be linked with the movable iron core; one end of the floating shaft is sleeved on the linkage shaft sleeve and is linked with the movable iron core through the linkage shaft sleeve;

the auxiliary contact mechanism includes: the contact spring comprises a cover body, an auxiliary contact and a movable spring, wherein the movable spring is arranged in the cover body; the other end of the floating shaft can penetrate through the cover body to push or deviate from the movable spring piece when the floating shaft is linked with the movable iron core, so that the movable spring piece is contacted with or separated from an auxiliary contact in the cover body.

The technical scheme of the utility model the technological effect includes at least:

the technical scheme of the utility model is that the floating shaft linked with the movable iron core is arranged in the movable iron core sealing cavity, so that the floating shaft pushes or deviates from the movable reed when linked with the movable iron core, and the movable reed is contacted with or separated from the auxiliary contact to realize the on-off of the auxiliary contact; and the floating shaft and the movable spring leaf of the auxiliary contact device are protected by the shaft sleeve and the cover body, so that the reliability is high, the auxiliary contact structure is not easy to deform, and the reliability and the service life of the auxiliary contact structure of the relay are greatly improved.

The technical proposal of the utility model is that the floating shaft is provided with a limiting ring and a blocking piece which can block the floating shaft inside the sleeve body optionally, so that the floating shaft can be limited inside the shaft sleeve in a floating way, and the strength and the reliability of the floating shaft are enhanced; the floating shaft can preferably abut against the blocking piece through a floating spring sleeved on the floating shaft, the linkage strength and reliability of the floating mechanism are optimized, and the floating spring can enable the floating shaft to buffer and push the movable spring piece to prevent the movable spring piece from deforming.

The technical scheme of the utility model optimizes the contact mode of the movable contact spring and the auxiliary contact selectively, and the positioning rod passes through the movable contact spring to limit the position of the spring and the movable contact spring through the assembly combination of the positioning rods with unlimited number and the positioning springs (the assembly number of the positioning rods and the positioning springs can be one group, two groups or multiple groups), thereby further limiting the position relation of the internal structure of the auxiliary contact mechanism; the positioning spring is sleeved on the positioning rod, the auxiliary movable spring is in contact with and separated from the auxiliary contact, the deformation of the movable spring is further prevented, and the reliability of the auxiliary equipment is enhanced.

The utility model discloses technical scheme has also optimized cover body structure, deposits the bits recess through setting up on the top facing of the cover body, can collect and move the metal piece that the iron core motion in-process produced because of wearing and tearing, prevents the interference that these metal pieces led to the fact the auxiliary contact switching, avoids auxiliary contact to detect the return circuit contact failure and causes and detect the trouble.

Drawings

Other features, objects and advantages of the present invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

fig. 1 is a schematic structural diagram of a prior art high-voltage direct-current relay on which the technical solution of the present invention is based;

fig. 2 is a schematic structural diagram of an auxiliary contact device applicable to a high-voltage direct-current relay according to the technical solution of the present invention;

fig. 3 is an exploded view of a floating mechanism suitable for an auxiliary contact device according to the technical solution of the present invention;

fig. 4 is an assembly view of the floating mechanism suitable for the auxiliary contact device according to the technical solution of the present invention;

fig. 5 is an exploded view of an auxiliary contact mechanism suitable for an auxiliary contact device according to the technical solution of the present invention;

fig. 6 is an assembly diagram of an auxiliary contact mechanism suitable for an auxiliary contact device according to the technical solution of the present invention;

fig. 7 is a schematic structural diagram of a high-voltage direct-current relay with an auxiliary contact device according to an embodiment of the present invention in one state;

FIG. 8 is an enlarged view of structure F1 of FIG. 7;

fig. 9 is a schematic structural diagram of a high-voltage direct-current relay with an auxiliary contact device according to another state provided in the present invention;

fig. 10 is an enlarged view of the structure F1 in fig. 9.

Detailed Description

In order to better clearly show the technical scheme of the present invention, the present invention is further described with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a high voltage direct current relay in the prior art, which includes: the device comprises a shell 1, a main contact device 2, an electromagnet device 3, a push rod 4, a supporting plate 5 and a sleeve 6. The housing 1 is typically a ceramic housing. The main contact device 2 includes a stationary contact 20 and a movable contact 21. The electromagnet device 3 includes: a stationary core 30, a movable core 31, and a coil assembly 32.

The shell 1 can play a role in high-voltage insulation, so that low-voltage elements in the relay are effectively prevented from being damaged or broken down, and the safety and the reliability of the relay are improved. The accommodating cavity 10 is formed in the shell 1 and can be filled with hydrogen or nitrogen, components in the relay are protected from being burnt out, and safety and reliability of the relay are further improved.

When the coil assembly 32 is energized, the electromagnet device 3 can attract the movable iron core 31 to the stationary iron core 30 by the electromagnetic force generated by the coil assembly 32, and move the movable iron core 31 from the first position to the second position. The pushing rod 4 is operated by the movement of the movable iron core 31, and the movable contact 21 is driven to move in the accommodating cavity 10 to contact with the fixed contact 20 when the pushing rod 4 is operated, so as to form a main contact loop of the high-voltage direct-current relay.

Here, the first position and the second position are the moving stroke of the movable iron core 31 generated by the electromagnet device 3 attracting the movable iron core 31 to the stationary iron core 30 by the electromagnetic force generated by the coil assembly 32 when the directional coil assembly 32 is energized. When the movable iron core 31 is at the second position of the movable stroke, the moving of the movable iron core 31 enables the push rod 4 to drive the movable contact 21 to contact with the contact of the static contact 20; when the movable iron core 31 is at the first position of the movable stroke, the moving of the movable iron core 31 causes the push rod 4 to drive the movable contact 21 to be separated from the stationary contact 20. That is, when the movable iron core 31 is located at the first position, the fixed contact 20 and the movable contact 21 are separated; when the movable iron core is located at the second position, the fixed contact 20 and the movable contact 21 form a closed state. By electrically controlling the coil assembly 32, the movable iron core 31 can be moved from the first position to the second position, or from the second position to the first position, so as to control the contact between the stationary contact 20 and the movable contact 21 or the contact separation.

In the prior art high-voltage direct-current relay, as shown in fig. 1, the movable iron core 31 has an iron core sealing cavity 310. The utility model discloses technical scheme sets up the auxiliary contact device through the sealed intracavity of iron core that has possessed at prior art high voltage direct current relay, accomplishes the supplementary detection function in main contact return circuit.

Based on fig. 1 shows high-voltage direct-current relay, the utility model provides a technical scheme provides an auxiliary contact device, can assemble with high-voltage direct-current relay to realize high-voltage direct-current relay's supplementary monitoring, as shown in fig. 2, this auxiliary contact device includes: a floating mechanism 7 and an auxiliary contact mechanism 8. The floating mechanism 7 and the auxiliary contact mechanism 8 may be disposed in the core seal cavity 310 of the prior art high voltage dc relay. In general, the auxiliary detection function of the main contact circuit is performed by an external auxiliary contact detection circuit (not shown). The auxiliary contact detection circuit can monitor the connection of the main contact circuit.

With continued reference to fig. 2, the float mechanism 7 may include: a linkage sleeve 70 and a floating shaft 71.

The linkage shaft sleeve 70 can be linked with the movable iron core 31, and one end of the floating shaft 71 is arranged in the linkage shaft sleeve 70 and is linked with the movable iron core 31 through the linkage shaft sleeve 70.

The auxiliary contact mechanism 8 may include: cover 80, auxiliary contact 81, and movable spring 82.

Both the auxiliary contact 81 and the movable spring 82 are arranged inside the casing 80, the auxiliary contact 81 being in particular constituted by a conductive metal end passing through the bottom of the sleeve 6, the metal end being connected to an external auxiliary contact detection circuit (not shown in the figures). The movable spring 82 is a conductive metal piece, and the other end of the floating shaft 71 can penetrate through the cover 80 to push the movable spring 82 to contact the auxiliary contact 81.

Since the interlocking sleeve 70 and the floating shaft 71 of the floating mechanism 7 are interlocked with the plunger 31, when the plunger 31 generates a moving stroke under the influence of the electromagnetic force generated by the coil assembly 32, the floating shaft 71 also generates a moving stroke:

when the movable iron core 31 moves from the first position to the second position, the floating shaft 71 moves away from the movable spring piece 82 in conjunction with the movable iron core 31 in the direction of attracting the stationary iron core 30, and the movable spring piece 82 separates from the auxiliary contact 81.

When the movable iron core 31 moves from the second position to the first position, the floating shaft 71 and the movable iron core 31 are interlocked in a direction away from the stationary iron core 30, and at this time, the floating shaft 71 pushes the movable spring piece 82 to move, so that the movable spring piece 82 contacts the auxiliary contact 81.

When the movable spring 82 and the auxiliary contact 81 are in a contact state, the metal end is connected to the external auxiliary contact detection circuit to be connected, and when the movable spring 82 and the auxiliary contact 81 are in a separation state to be separated, the metal end is connected to the external auxiliary contact detection circuit to be disconnected, so that the monitoring of the auxiliary contact detection circuit is realized.

More specifically:

the linkage sleeve 70 and the movable iron core 31 can be fixed through an auxiliary connecting bracket or an adhesive, and one end of the floating shaft 71 can be fixed inside the linkage sleeve 70. Although the floating shaft 71 and the linkage shaft sleeve 70 can be connected by hard connection methods such as welding, bonding and the like to realize linkage between the floating shaft 71 and the linkage shaft sleeve 70 and the movable iron core 31, the hard connection may cause deformation of the movable spring 82 due to continuous impact of the movable iron core driving the floating shaft, so that the hard connection method can be preferably changed by a floating spring, the floating shaft 71 is fixed in the linkage shaft sleeve 70 by a buffer connection method, and particularly the floating shaft 71 can be fixed in the linkage shaft sleeve 70 by the buffer spring.

As can be seen from fig. 2, the auxiliary contact 81 can be fixed in the cover 80 through the bottom of the sleeve 6, and stands upright in the moving direction of the movable spring 82. The movable spring 82 is provided above the auxiliary contact 81 and has a movement gap with the auxiliary contact 81, the movement gap between the movable spring 82 and the auxiliary contact 81 is narrowed to be in contact when the floating shaft 71 moves downward, and the movable spring 82 moves upward along with the movement gap and separates from the auxiliary contact 81 to restore the original movement gap when the floating shaft 71 moves upward. Therefore, the movable contact 82 may be connected to the top of the cover 80 by a first spring (not shown) or may be connected to the bottom of the sleeve 6 by a second spring 83 (only the second spring 83 is shown in fig. 2), so that when the floating shaft 71 moves upward by the first spring or the second spring 83, the movement gap with the auxiliary contact 81 is restored without receiving the urging force of the floating shaft 71. The movable spring 82 may be formed integrally with the first spring 83 or the second spring 83.

The first spring may be a reaction spring that is extended when the floating shaft 71 pushes the movable contact 82, and when the floating shaft 71 moves upward, the first spring returns the movable contact 82 to its original position, and returns a movement gap with the auxiliary contact 81 to its original position. The second spring 83 is a floating spring, and is compressed when the floating shaft 71 pushes the movable spring 82, and returns the movable spring 82 to its original position when the floating shaft 71 moves upward, and returns a moving gap to the auxiliary contact 81. Fig. 2 illustrates that the movable spring 82 is fixed above the auxiliary contact 81 by means of a second spring 83 connected to the bottom of the sleeve 6.

In a more specific embodiment, referring to fig. 3 and 4, the floating mechanism 7a may further include, in addition to the linking boss 70a and the floating shaft 71 a: a limiting ring 72, a baffle plate 73 and a floating spring 74. The confinement ring 72 is provided to the floating shaft 71a, and may be integrally formed with the floating shaft 71a.

The link bushing 70a includes: the sleeve body 700 and a lip 701 extending around the sleeve body 700 and capable of being fixed with the movable iron core 31. The top of the sheath body 700 is provided with a first cuff 702, and the bottom is provided with a second cuff 703. The lip 701 as an auxiliary connecting mechanism can be fixed to the bottom end of the plunger 31 by an adhesive, and further, the floating mechanism 7a can be fixed in the plunger sealing cavity 310 as shown in fig. 1 and 2.

The floating shaft 71a and the limiting ring 72 enter the sleeve body 700 through the first sleeve opening 702, one end of the floating shaft 71a extends out of the sleeve body 700 through the second sleeve opening 703, and the limiting ring 72 blocks the other end of the floating shaft 71a from extending out of the second sleeve opening 703 through limiting action to limit the end in the sleeve body 700. Thus:

the opening area of the first socket 702 is larger than not only the cross-sectional area of the floating shaft 71a but also the annular area of the limiting ring 72, whereby the floating shaft 71a and the limiting ring 72 movably pass through the first socket 702.

The second pocket 703 has an open area greater than the cross-sectional area of the floating shaft 71a but less than the annular area of the confinement ring 72 such that a portion of the floating shaft 71a is movable through the second pocket 703 but the confinement ring 72 confines another portion of the floating shaft 71a within the housing 700.

During assembly, the floating shaft 71a and the limiting ring 72 pass through the first sleeve opening 702, one part of the floating shaft 71a passes through the second sleeve opening 703, the other part is limited inside the sleeve body 700 by the limiting ring 72, and the assembly of the floating shaft 71a is completed.

With continued reference to fig. 4, the blocking area of the blocking plate 73 is larger than the opening area of the first cuff 702, and when the floating shaft 71a is assembled, the blocking plate 73 can be fastened to the jacket body 700 at the top of the jacket body 700 for blocking the top of the floating shaft 71a defined inside the jacket body 700 and blocking the floating shaft 71a defined inside the jacket body 700 from passing out again through the first cuff 702 during the linkage process.

It should be noted that, in other embodiments, the above floating mechanism 7a may be configured without the floating spring 74 and used for realizing the auxiliary contact device provided by the technical solution of the present invention. However, since the hard impact of the floating shaft with the inner wall of the sleeve 700 and the stopper 73 during the linkage of the floating mechanism 7a and the plunger 31 causes the abrasion and deformation of these mechanisms, in a preferred example, the floating mechanism 7a may be further equipped with a floating spring 74 as shown in fig. 3 and 4.

The floating spring 74 can be sleeved on the floating shaft 71a limited in the sleeve body 700, and two ends of the floating spring 74 can respectively abut against the limiting ring 72 and the blocking piece 73 when the assembly is completed, so that the floating connection in the linkage process is realized, and the abrasion and deformation defects of hard impact are eliminated.

More specifically, the floating spring 74 has an outer diameter with a spring cross-sectional area smaller than the annular area of the defining ring 72, so that the floating spring 74 can be defined on the floating shaft 71a inside the housing body 700. The floating spring 74 has an inner diameter having a spring sectional area larger than that of the floating shaft 71a so as to be movably fitted over the floating shaft 71a. The free height of the floating spring 74 is close to or slightly greater than the height distance between the center point of the first cuff 702 and the center point of the second cuff 703 of the cuff body 700, and the floating spring 74 of the cuff body 700 is in a slightly compressed state in an uncompressed state, but may not be in a fully compressed state. In the process of linkage of the floating mechanism 7a and the movable iron core 31, the floating shaft 71a of the floating mechanism 7a pushes the movable spring piece 82 shown in fig. 2, so that the floating spring 74 is further compressed in the sleeve body 700, and the compression of the floating spring 74 buffers the impact of the floating shaft 71a and the movable spring piece 82, the inner wall of the sleeve body 700 and the baffle plate 73, thereby preventing the defects of structural wear and deformation caused by hard impact.

The flap 73 may directly seal the first cuff 702 completely or partially to block the floating shaft 71a defined within the jacket 700. The flap 73 may be directly bonded to the cooperating boss 70a around the first socket 702 or riveted through a mating hole. With continued reference to fig. 3 and 4, the top of the sheath body 700 is provided with

positioning protrusions

75a and 75b around the first cuff 702, the blocking piece 73 is provided with through

holes

76a and 76b fitted with the

positioning protrusions

75a and 75b (note that the number of the positioning protrusions and the through holes may be set as required in other examples, and is not limited by the embodiment), and the blocking piece 73 is riveted with the through

holes

76a and 76b through the

positioning protrusions

75a and 75b or fixed by dispensing at the fitting position when fastened with the sheath body 700. The

positioning projections

75a and 75b and the through

holes

76a and 76b are fixed in a matching manner, so that the positioning assembly of the baffle plate 73 and the shaft sleeve 70a is quicker, and the production efficiency is improved.

With continued reference to fig. 3 and 4, the lip 701 of the sleeve 70a is an annular lip and is provided with

bonding bumps

704a, 704b (note that the number of bonding bumps may be set as desired in other examples, and is not limited by this embodiment). The number of bonding bumps may be arbitrary, and two

bonding bumps

704a, 704b are illustrated as symmetrical right and left. Because of the need to cooperate with the movable core 31 in the prior art to fix the floating mechanism 7a in the accommodating cavity 310 of the movable core 31, the movable core 31 can be better configured to have an edge capable of being bonded with the

bonding protrusions

704a and 704b, and has an accommodating cavity shape adapted to the width and height directions of the annular lip, the annular lip 701 can be fixed to the movable core 31 through the

bonding protrusions

704a and 704b, and the lip 701 of the floating mechanism 7a can be placed in the accommodating cavity 310 of the movable core 31 in a more fitting manner, because the accommodating cavity 310 is adapted to the annular lip in the width and height directions, the floating mechanism can be installed in cooperation with the relay structure in the prior art, so as to save space.

With continued reference to fig. 3 and 4, an annular lip 701 is formed by extending the jacket around a first cuff 702 at the top of the jacket 700 in the axial cross-sectional direction. In other embodiments, the lip may be formed by extending the side circumference of the sleeve, and the lip only needs to match with the shapes of the movable core 31 and the accommodating cavity 310 to fix the floating mechanism to the movable core 31, so that the floating shaft can be linked with the movable core.

In this embodiment, the floating shaft 71a may be made of plastic, or may be made of other insulating materials.

In the embodiment of the present invention, the auxiliary contact mechanism includes, except as shown in fig. 2: the cover 80, the auxiliary contact 81, the movable spring 82, and the corresponding spring (e.g., the spring 83 in fig. 2) may further include: chassis and reference column.

With continued reference to fig. 5 and 6, the auxiliary contact mechanism 8a includes: cover 80a, auxiliary contact 81a, movable spring 82a, positioning spring 83a, bottom plate 84 and positioning column 85.

The auxiliary contact 81a has a metal lead-out terminal 810 and a metal contact terminal 811, the metal lead-out terminal 810 is connected to an external auxiliary contact detection circuit (not shown) through the chassis 84, and the metal contact terminal 811 is not connected to the chassis 84 through the chassis. The auxiliary contact 81a may have a positioning ring 812, and the positioning ring 812 is disposed on the auxiliary contact 81a between the leading metal end 810 and the contact metal end 811, and is configured to abut against the chassis 84 when the auxiliary contact 81a passes through the chassis 84, so as to limit the contact metal end 811 in the housing 80 a. As shown in fig. 5 and 6, the auxiliary contacts 81a are a pair, and both are provided on the chassis 84 symmetrically in the chassis diameter direction.

By providing the base plate 84, the cover 80a can be better secured to the bottom of the sleeve 6 to fit the prior art relay structure.

Although the movable spring 82 can be fixed to the top of the housing 80a by the first spring, it can be connected to the bottom plate 84 or the bottom of the sleeve 6 by the second spring 83. When the floating shaft of the floating mechanism is linked with the movable iron core, and the floating mechanism pushes the movable spring plate to be contacted with the contact metal end 811 of the auxiliary contact 81a, the first spring is stretched or the second spring is compressed; when the movable spring piece is restored, the first spring or the second spring restores to the original state to separate the movable spring piece from the auxiliary contact 81 a.

However, only the contact and separation between the auxiliary movable spring and the auxiliary contact 811 are required to be performed, which requires high precision and strength of the spring. The method specifically comprises the following steps:

positioning posts 85 are made to stand on the base plate 84 at the time of assembly to make auxiliary contact and separation of the movable spring 82a with the auxiliary contact portions 811 which do not pass through the base plate 84. Specifically, as shown in fig. 5 and 6, there is also a pair of positioning posts 85 (positioning posts 85a,85b, note that the number of the positioning posts may be set as needed in other examples, and may be set as one, two or more, and is not limited by this embodiment), the positioning posts 85a,85b are fixed on the top surface of the cover 80a, and the positioning posts 85 are inversely fixed on the chassis 84 by assembling the cover 80a and the chassis 84.

The cover 80a further includes: cover 800 and cover wall 801. The end of the cover wall 801 facing away from the cover 800 is provided with a cover rim 802 which is fixed in cooperation with the chassis 84.

The positioning posts 85a,85b are disposed on the cover 800 on the top surface of the cover 80a, fixed with the cover 800 and standing upright on the cover 800. The cover body 80a is matched and fixed with the chassis through a cover edge 802 which can be annularly arranged at the bottom end of the cover wall 801, and the cover edge 802 is a sealing ring, so that the assembly sealing performance can be improved. After cover 800 and cover wall 801 are assembled, positioning posts 85a,85b can be placed upside down through cover 800 and stand on the chassis to fix and position positioning posts 85a, 85b. Locating posts 85a,85b may also be integrally formed with cover 800. The cover wall 801 encloses positioning posts 85a,85b, movable spring pieces 82a, positioning springs, and the like inside the cover body 80a to seal these components, and the cover face 800 is disposed facing the floating mechanism 7 and is provided with an opening 803 at the cover face with respect to the center position of the movable spring pieces 82a. The floating shaft 71a can protrude into the interior of the housing 80a through the opening 803 to push the movable spring 82a. Furthermore, the cover 800 and the cover wall 801 of the present embodiment are detachably assembled, the cover 800 is a disk-shaped structure with a central hole, and the cover wall 801 is a tubular structure. The cover 800 has several cover protrusions (without limitation to the number, the protrusions 804a to 804d are illustrated in the figure, and there are four cover protrusions with similar structures in total), and one end of the cover wall 801 near the cover 800 is provided with

several positioning grooves

805a and 805b and fixing

slots

806a and 806b which are matched with the cover protrusions. According to the illustration, the

protrusions

804a and 804c can be positioned in cooperation with the

positioning grooves

805a and 805b, and the

protrusions

804b and 804d can be fixed in cooperation with the fixing

slots

806a and 806b. The cover 800 and the cover wall 801 may be made of plastic material, and further, an oblique angle (not shown) may be formed on the protrusions 804a to 804d, especially the

protrusions

804b and 804d, to facilitate the fitting of the protrusions and the fixing

slots

806a and 806b.

In a specific application scenario, the cover wall 801 may also be implemented by a metal ring structure, and the cover wall 801 may be connected to the cover body 80a by a manner including, but not limited to, snapping, riveting, dispensing, and the like.

The rim 802 may also be a circular tab structure by which the wall 801 may be brazed to the base plate 84 (which may be a ceramic cover). The cover wall 801 and the chassis 84 are fixed by soldering with a round solder piece, so that the deformation amount can be reduced, and the device sealing performance can be ensured.

The periphery of the cover surface can also be only provided with bulges which are matched and positioned with the positioning grooves, one end of the cover wall close to the cover surface can be only provided with a plurality of positioning grooves which are matched with the bulges of the cover surface, and the groove wall between the positioning grooves is set as a foldable groove wall. When the cover surface and the cover wall are assembled through the cover surface protrusions and the positioning grooves, the foldable groove wall of the cover wall can be bent to limit the cover surface, so that the assembly of the cover surface and the cover wall is completed.

In the cover 800 shown in fig. 5 and 6, a plurality of chip storage grooves 807 are further provided on a surface facing the floating mechanism 7, and these chip storage grooves may be annular grooves, or may be arbitrarily provided in the shape and size of the groove surface as needed. The scrap storage groove 807 can be used for collecting metal scraps generated by abrasion in the moving process of the movable iron core, so that the interference of the metal scraps on the opening and closing of the auxiliary contact is prevented, and the detection accuracy of the auxiliary contact detection loop is improved.

With reference to fig. 5 and 6, in order to reduce the size of the structure and further facilitate the integration and miniaturization of the auxiliary contact device of the relay to adapt to the structure of the relay in the prior art, the movable spring 82a in fig. 5 and 6 is further provided with assembling

holes

86a and 86b which can be installed in cooperation with the positioning posts 85a and 85b. The number of the assembling holes is set to match the number of the positioning columns, and the embodiment has a pair of positioning columns, so that a pair of assembling holes is correspondingly set. The positioning posts 85a,85b can movably pass through the

corresponding assembly holes

86a,86b of the movable spring, and are inversely arranged on the chassis 84 by being fixed on the top surface of the cover body 80 a.

The positioning springs 83a and 83b (corresponding to the second springs) can be respectively sleeved on the positioning posts 85a and 85b to realize the contact and separation of the movable spring and the auxiliary contact. The number of the positioning springs can be matched according to the number of the positioning columns, and the embodiment is provided with a pair of positioning columns, so that a pair of positioning springs is configured. Cover 80a may be cooperatively mounted with base 84 to receive alignment posts 85a,85b and

alignment springs

83a, 83b. With continued reference to fig. 5 and 6, after assembly, the positioning springs 83a, 83b have one end abutting the movable spring 82a and the other end abutting the bottom plate 84. Positioning springs 83a, 83b may be in a compressed state after assembly (the compressed state is due to the movable spring being subjected to the thrust of the floating shaft and its own weight), and the height of the springs in this compressed state is such that the movable spring contacts the auxiliary contact, i.e., the height of

springs

83a, 83b is equal to or close to the height of contact metal end 811 defined in cover 80a of auxiliary contact 81a, and the contact metal end 811 of the movable spring and the auxiliary contact is brought into contact by the compression of the springs. When the movable spring is pushed when the floating shaft is interlocked with the stationary core, the positioning springs 83a and 83b may be in the compressed state as described above, and the movable spring may be brought into contact with the auxiliary contact.

When the floating shaft and the static iron core are linked and separated from the movable reed, the movable reed is separated from the auxiliary contact, the positioning springs 83a and 83b are in a slightly compressed state, the movable reed gradually reduces the thrust of the floating shaft until only self gravity at the moment of the compression state, so that the positioning springs 83a and 83b are only subjected to the self gravity of the movable reed and gradually rebound from the compressed state to the slightly compressed state, the heights of the

springs

83a and 83b are larger than the height of a contact metal end 811 limited in the cover body 80a, and the contact metal ends 811 of the movable reed and the auxiliary contact are separated because the springs rebound to the slightly compressed state.

The positioning springs 83a and 83b are sleeved on the positioning posts 85a and 85b, and only need to be abutted against the movable spring 82a and the bottom plate 84 at two ends thereof during assembly, but certainly, the two ends of the positioning springs 83a and 83b can be further fixed to be abutted against the movable spring 82a and the bottom plate 84 to increase the strength.

Referring to fig. 5, convex hulls t1 and t2 may be provided at positions where the chassis 84 and the positioning springs 83a and 83b abut against each other. The convex hulls t1, t2 are provided on the chassis 84. The positioning springs 83a, 83b are inserted with their bottoms inserted onto the bosses t1, t2 during assembly to limit the positions of the bottoms of the positioning springs 83a, 83b, which defines the position of the positioning springs 83a, 83b against the bottom plate 84.

In other embodiments, the convex hull structure of the chassis for limiting the spring can be replaced by a groove structure, and the bottom of the positioning spring can be directly inserted into the corresponding groove to realize limiting. The bottoms of the positioning springs 83a, 83b may also be directly fixed to the bottom plate 84, thereby functioning to define the spring positions.

Based on above-mentioned embodiment auxiliary contact device, the utility model discloses technical scheme still provides a take high voltage direct current relay of auxiliary contact device, include: the contact device comprises a shell 1, a main contact device 2, an electromagnet device 3, a push rod 4, a supporting plate 5, a sleeve 6 and an auxiliary contact device. The main contact device 2 comprises a stationary contact 20 and a movable contact 21. The electromagnet device 3 includes: the stator core 30, the movable core 31 and the coil assembly 32, the movable core 31 has a core sealing cavity 310. The auxiliary contact device specifically includes: the floating mechanism 7 and the auxiliary contact mechanism 8, wherein the specific structures of the floating mechanism 7 and the auxiliary contact mechanism 8 can be implemented by using the floating mechanism 7a and the auxiliary contact mechanism 8a shown in fig. 3 to 6, which are not described herein again.

It should be noted that, as can be seen from fig. 2, the sleeve 6 may be a metal shell, and the electromagnet device 7 and the auxiliary contact device 8 are disposed in the sleeve 6. In order to extend the auxiliary contact 81a out of the sleeve for connection with an external auxiliary detection circuit, the metal sheet of the bottom of the metal housing may be provided with a metal hole for the auxiliary contact to extend out. Auxiliary bonding pads (such as auxiliary bonding pads j1, j2 shown in fig. 5) can be arranged in the metal holes. Referring to fig. 5 and 2, the bottom plate 84 may be a ceramic cover, and may be installed at the bottom of the metal housing, and the bottom plate 84 is therefore provided with installation holes (j 3, j 4) corresponding to the metal holes. The auxiliary contact can pass through the chassis through the mounting hole and be connected with an external auxiliary contact detection loop through the metal hole. The auxiliary solder tabs j1, j2 can be used to solder the auxiliary contacts to the metal holes of the bottom of the metal housing to fix the auxiliary contacts to the bottom of the metal housing and the bottom plate 84.

Based on the high-voltage direct-current relay with the auxiliary contact device, fig. 7 is a schematic view of the assembly completion of the high-voltage direct-current relay. The auxiliary contact device is realized by using a floating mechanism 7a and an auxiliary contact mechanism 8 a. With continued reference to fig. 8 (fig. 8 is an enlarged view of the structure F1 in fig. 7), the floating mechanism 7a is realized by the linking shaft sleeve 70a, the floating shaft 71a, the limiting ring 72, the blocking piece 73 and the floating spring 74, and the auxiliary contact point mechanism 8a is realized by the cover 80a (including the cover surface 800 and the cover wall 801), the auxiliary contact point 81a, the movable spring 82a, the positioning spring 83a, the chassis 84 and the positioning post 85.

With reference to fig. 8 and with reference to fig. 3 and 4, the floating shaft 71a and the floating spring 74 are sequentially assembled with the sleeve body 700 of the linkage shaft sleeve 70a, and then the

positioning protrusions

75a and 75b of the linkage shaft sleeve 70a and the matching through

holes

76a and 76b of the blocking piece 73 are used to rivet and match the blocking piece 73 with the hole of the linkage shaft sleeve 70a, or the matching position is fixed by dispensing. And then fixing the assembled floating mechanism 7a to the movable iron core 31 (integral glue fixing can be adopted), so that the floating mechanism 7a, the movable iron core 31 and the main contact loop keep consistent motion frequency.

When the auxiliary contact mechanism 8a is assembled, the cover wall 801, the auxiliary contact 81a and the chassis 84 are brazed into a whole by auxiliary solder, then the movable spring 82a, the positioning spring 83a, the cover surface 800 and the positioning column 85 are assembled, and then the protrusions (804 a to 804 d) of the cover surface 800 and the positioning grooves (805 a and 805 b) of the cover wall 801 are correspondingly matched, positioned and fixed with the fixing clamping grooves (806 a and 806 b), so that the assembly of the auxiliary contact mechanism 8a is completed. During assembly, the

protrusions

804a and 804c can be installed along the

positioning grooves

805a and 805b in a guiding manner, and the

protrusions

804b and 804d can be clamped in the slotted holes of the

fixing clamping grooves

806a and 806b to limit the positions up and down, so that the assembly is completed.

Finally, the auxiliary contact mechanism 8a is abutted against the bottom of the sleeve 6, and the chassis 84 may be laser welded to the sleeve 6, for example, to complete the assembly.

It should be noted that the bottom plate of the sleeve 6 can be formed by the bottom plate 84, that is, the bottom plate 84 can be directly laser welded to the bottom of the sleeve 6 to form the bottom plate of the sleeve 6. The chassis is provided with a mounting hole and can be provided with an auxiliary soldering lug; the auxiliary contact can directly pass through the chassis through the mounting hole to be connected with an external auxiliary contact detection loop. The auxiliary contact may be soldered to the chassis by the auxiliary solder tab.

With reference to fig. 9 and 10, in the use process of the relay shown in fig. 7 to 10:

when the coil assembly 32 is electrically controlled to be in relay attraction, the movable iron core 31 is subjected to the electromagnetic force generated by the coil assembly 32 and then overcomes the gravity and the spring force to drive the floating mechanism 7a to move upwards, and meanwhile, the floating spring 74 is slowly restored to the original installation length. The movable core 31 moves from the first position S1 in fig. 8 to the second position S2 shown in fig. 10 (note that the first position and the second position are relative positions, and may be referred to as a stationary core position, or a position of the cover 800 of the cover 80a, and in fig. 8 and 10, the first position and the second position are referred to as a distance between the bottom end of the movable core 31 and the top end of the cover 800, and in other embodiments, similar reference positions may be taken). In this process, as the movable iron core 31 is slowly raised, the movable spring piece 82a is slowly moved upward by the positioning springs (83 a, 83 b) and separated from the auxiliary contact 81a, and by this time, the movable spring piece 82a is separated from the auxiliary contact 81 a. When the movable spring 82a is separated from the auxiliary contact 81a, the external auxiliary contact detection circuit is turned off, and the main contact circuit is stably turned on.

When the coil assembly 32 is electrically controlled to release the relay, the coil assembly 32 has no electromagnetic force, the floating mechanism 7a is driven by the movable iron core 31 to move downward by the action of gravity and spring force, the movable iron core 31 gradually moves to the first position S1 shown in fig. 7 as shown in the second position S2 shown in fig. 10, and when the floating shaft 71a pushes the movable spring 82a, since the force value of the floating spring 74 can be close to or greater than the force value of the positioning spring (83 a, 83 b), the movable spring 82a continues to move downward by the pushing of the floating shaft 71a until the movable spring 82a contacts with the auxiliary contact 81a, so that the external auxiliary contact detection circuit is closed and conducted. After the movable spring 82a contacts the auxiliary contact 81a, the end surface of the floating shaft 71a in the boss does not abut against the stopper 73, but has a gap distance therebetween due to the floating spring 74. One end of the floating spring 74 abuts against the stopper 73, and the other end abuts against the limit ring 72 of the floating shaft 71. Therefore, although the floating shaft 71a cannot move downward any more after the movable spring 82a contacts the auxiliary contact 81a, the movable iron core 31 can still move downward any more, and at this time, the pressure is transferred to the floating spring 74, so that the movable spring 82a is prevented from being deformed by the pressure of the movable iron core, and the service life is greatly prolonged.

The foregoing description of the specific embodiments of the invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes and modifications may be made by those skilled in the art within the scope of the appended claims without departing from the spirit of the invention.

Claims

1. A high voltage direct current relay with an auxiliary contact arrangement, comprising: main contact device, electromagnet device, auxiliary contact device, main contact device includes: static contact and moving contact, electromagnet device includes: the static iron core, the movable iron core and the coil assembly; when the coil assembly is electrified, the electromagnet device can attract the movable iron core to the static iron core by utilizing the electromagnetic force generated by the coil assembly, so that the movable iron core moves from a first position to a second position; when the movable iron core is positioned at the first position, the static contact and the movable contact form a separation state; when the movable iron core is located at the second position, the static contact and the movable contact form a closed state; characterized in that the auxiliary contact device comprises: a floating mechanism and an auxiliary contact mechanism;

when the movable iron core moves from the first position to the second position, the floating shaft and the movable iron core are linked in the direction of attracting the movable iron core to the static iron core, and the floating shaft deviates from the movable spring plate so that the movable spring plate is separated from the auxiliary contact;

2. The hvdc relay with an auxiliary contact arrangement as claimed in claim 1, wherein said float mechanism further comprises: a baffle plate; the floating shaft is provided with a limiting ring, and the linkage shaft sleeve comprises: the sleeve body is arranged in the center of the shaft sleeve, and the lip edge which is formed by extending the periphery of the sleeve body and can be fixed with the movable iron core is formed;

the top of the sleeve body is provided with a first sleeve opening, and the bottom of the sleeve body is provided with a second sleeve opening; the opening area of the first sleeve opening is larger than the cross section area of the floating shaft and the annular area of the limiting ring, so that the floating shaft and the limiting ring can movably penetrate through the first sleeve opening; the opening area of the second sleeve opening is larger than the cross-sectional area of the floating shaft and smaller than the annular area of the limiting ring, so that one part of the floating shaft can movably penetrate through the second sleeve opening, but the limiting ring limits the other part of the floating shaft inside the sleeve body; when the floating shaft and the limiting ring pass through the first sleeve opening, one part of the floating shaft passes through the second sleeve opening, and the other part of the floating shaft is limited in the sleeve body by the limiting ring, the assembly of the floating shaft is completed;

3. The hvdc relay with an auxiliary contact arrangement as claimed in claim 2, wherein said float mechanism further comprises: a floating spring; the spring section area based on the outer diameter of the floating spring is smaller than the annular area of the limiting ring, the spring section area based on the inner diameter of the floating spring is larger than the section area of the floating shaft, and the free height of the floating spring is close to the inner height from the center point of a first sleeve opening to the center point of a second sleeve opening of the sleeve body;

4. The HVDC relay with the auxiliary contact device of claim 3, wherein the floating shaft is defined inside the sleeve body with a clearance distance from the blocking piece, and the floating spring is sleeved on the floating shaft inside the sleeve body and has one end abutting against the blocking piece and the other end abutting against the limiting ring.

5. The hvdc relay with auxiliary contact devices as claimed in claim 2, wherein a positioning protrusion is disposed on the top of said sheath around said first opening, said blocking piece has a through hole fitted with said positioning protrusion, and said blocking piece is riveted with said through hole by said positioning protrusion or fixed by dispensing at the fitting position when fastened to said sheath.

6. The HVDC relay with an auxiliary contact device according to any one of claims 2 to 5, wherein the lip is an annular lip and is provided with an adhesive protrusion, and an end of the movable core facing away from the stationary core is provided with a receiving cavity adapted to the annular lip, and the annular lip is fixed to the movable core through the adhesive protrusion.

7. The hvdc relay having an auxiliary contact assembly in accordance with claim 6, wherein said annular lip is formed by extending around the first opening at the top of the sleeve body.

8. The hvdc relay having an auxiliary contact assembly in accordance with claim 6, wherein said annular lip is formed by a lateral extension of the housing.

9. The hvdc relay with an auxiliary contact arrangement as claimed in claim 1, wherein said auxiliary contact mechanism further comprises: the positioning device comprises a chassis, a positioning column and a positioning spring; one part of the auxiliary contact can be connected with an external auxiliary contact detection loop through the chassis, and the other part of the auxiliary contact does not pass through the chassis to be established on the chassis; the positioning column can movably penetrate through the movable reed and is arranged on the chassis; the positioning spring can be sleeved on the positioning column, one end of the positioning spring abuts against the movable reed, and the other end of the positioning spring abuts against the chassis, so that the movable reed and the auxiliary contact are in buffer contact when the floating shaft pushes the movable reed, and the movable reed and the auxiliary contact are gradually separated when the floating shaft deviates from the movable reed; the cover body can be installed with the chassis in a matched mode to contain the positioning column and the positioning spring.

10. The hvdc relay with auxiliary contact devices as recited in claim 9, wherein said movable spring is provided with a fitting hole for engaging with said positioning post; the positioning column can movably penetrate through the assembly hole of the movable spring leaf to be arranged on the base plate.

11. The hvdc relay having an auxiliary contact assembly as claimed in claim 9, wherein said positioning spring is fixedly attached at one end to said movable contact spring and at the other end to said base plate.

12. The hvdc relay having an auxiliary contact device in accordance with claim 9, wherein said bottom plate is provided with a protrusion or a groove at a position abutting against said positioning spring, and said positioning spring is inserted into said protrusion or groove for assembly.

13. The hvdc relay with an auxiliary contact arrangement as claimed in any of claims 9-12, wherein said housing comprises: cover surface and cover wall; one end of the cover wall, which is far away from the cover surface, is provided with a cover edge which is matched and fixed with the chassis; the positioning column is arranged on the cover surface, and when the cover body is matched and fixed with the chassis through the cover edge, the positioning column is arranged on the chassis through the cover surface; the cover body can also accommodate an auxiliary contact which does not penetrate through the chassis, the cover surface is arranged facing the floating mechanism, and an opening is formed in the position, opposite to the center of the movable spring, of the cover surface; the floating shaft can extend into the cover body through the opening to push the movable spring plate.

14. The hvdc relay with auxiliary contact means as recited in claim 13, wherein said cover surface is provided with a debris retaining recess facing said floating mechanism.

15. The hvdc relay with an auxiliary contact arrangement, according to claim 14, wherein said debris retaining groove is an annular groove.

16. The hvdc relay having an auxiliary contact assembly in accordance with claim 13, wherein said cover and cover wall are removably mounted, said cover being disk shaped and said cover wall being tubular; the cover surface is provided with a plurality of cover surface bulges on the periphery, and one end of the cover wall close to the cover surface is provided with a plurality of positioning grooves and fixing clamping grooves matched with the cover surface bulges.

17. The hvdc relay having an auxiliary contact assembly in accordance with claim 13, wherein said cover and cover wall are removably mounted, said cover being disk shaped and said cover wall being tubular; a plurality of cover surface bulges are arranged on the periphery of the cover surface, a plurality of positioning grooves matched with the cover surface bulges are arranged at one end of the cover wall close to the cover surface, and foldable groove walls are arranged between the positioning grooves; when the cover surface and the cover wall are assembled through the cover surface protrusions and the positioning grooves, the foldable groove wall is bent to limit the cover surface.

18. The hvdc relay with auxiliary contact arrangement as recited in claim 9, further comprising: a metal housing; the electromagnet device and the auxiliary contact device are arranged in the metal shell, a metal hole is formed in a metal sheet at the bottom of the metal shell, and an auxiliary soldering lug can be arranged in the metal hole; the chassis is a ceramic cover and can be installed at the bottom of the metal shell in a matching way, and the chassis is provided with an installation hole corresponding to the metal hole; the auxiliary contact can penetrate through the chassis through the mounting hole and penetrate through the metal hole to be connected with an external auxiliary contact detection loop; the auxiliary contact can be soldered at the bottom of the metal shell through the auxiliary soldering lug so as to be fixedly arranged on the chassis.

19. The hvdc relay with auxiliary contact arrangement as recited in claim 9, further comprising: a metal housing; the electromagnet device and the auxiliary contact device are arranged in the metal shell, and the chassis is also used as the bottom of the metal shell; the chassis is provided with a mounting hole and can be provided with an auxiliary soldering lug; the auxiliary contact can penetrate through the chassis through the mounting hole to be connected with an external auxiliary contact detection loop; the auxiliary contact may be soldered to the chassis by the auxiliary solder tab.

20. An auxiliary contact arrangement adapted for use in a high voltage direct current relay, the high voltage direct current relay comprising: a movable iron core; it is characterized by comprising the following steps: a floating mechanism and an auxiliary contact mechanism;

the auxiliary contact mechanism includes: the contact device comprises a cover body, an auxiliary contact and a movable reed, wherein the movable reed is arranged in the cover body; the other end of the floating shaft can penetrate through the cover body to push or depart from the movable spring plate when being linked with the movable iron core, so that the movable spring plate is contacted with or separated from the auxiliary contact in the cover body.

21. An auxiliary contact arrangement as claimed in claim 20 wherein said floating shaft is provided with a limiting ring, said cooperating bushing comprising: the sleeve body is arranged in the center of the shaft sleeve, and the lip edge which is formed by extending the periphery of the sleeve body and can be fixed with the movable iron core is formed;

the top of the sleeve body is provided with a first sleeve opening, and the bottom of the sleeve body is provided with a second sleeve opening; the opening area of the first sleeve opening is larger than the cross section area of the floating shaft and the annular area of the limiting ring, so that the floating shaft and the limiting ring can movably penetrate through the first sleeve opening; the opening area of the second sleeve opening is larger than the section area of the floating shaft and smaller than the annular area of the limiting ring, so that one part of the floating shaft can movably penetrate through the second sleeve opening, but the limiting ring limits the other part of the floating shaft inside the sleeve body; when the floating shaft and the limiting ring pass through the first sleeve opening, one part of the floating shaft passes through the second sleeve opening, and the other part of the floating shaft is limited inside the sleeve body by the limiting ring, the assembly of the floating shaft is completed; the floating mechanism further comprises: a baffle plate;

22. An auxiliary contact arrangement as recited in claim 20, wherein the auxiliary contact mechanism further comprises: the positioning device comprises a chassis, a positioning column and a positioning spring; one part of the auxiliary contact can be connected with an external auxiliary contact detection loop through the chassis, and the other part of the auxiliary contact does not pass through the chassis to be established on the chassis; the positioning column movably penetrates through the movable reed and is arranged on the chassis; the positioning spring can be sleeved on the positioning column, one end of the positioning spring abuts against the movable reed, and the other end of the positioning spring abuts against the chassis, so that the movable reed and the auxiliary contact are in buffer contact when the floating shaft pushes the movable reed, and the movable reed and the auxiliary contact are gradually separated when the floating shaft deviates from the movable reed; the cover body can be installed with the chassis in a matched mode to contain the positioning column and the positioning spring.

23. An auxiliary contact arrangement as claimed in claim 22, wherein the cover comprises: cover surface and cover wall; one end of the cover wall, which is far away from the cover surface, is provided with a cover edge which is matched and fixed with the chassis; the positioning column is arranged on the cover surface, and when the cover body is matched and fixed with the chassis through the cover edge, the positioning column is arranged on the chassis through the cover surface; the cover body can also accommodate an auxiliary contact which does not penetrate through the chassis, the cover surface is arranged facing the floating mechanism, and an opening is formed in the position, opposite to the center of the movable spring, of the cover surface; the floating shaft can extend into the cover body through the opening to push the movable spring plate.

24. An auxiliary contact arrangement as claimed in claim 23, wherein the cover face is provided with a chip-retaining recess facing the floating mechanism.