CN218385036U

CN218385036U - Zxfoom

Info

Publication number: CN218385036U
Application number: CN202222688303.XU
Authority: CN
Inventors: 王萌; 陈松生; 洪尧生; 代文广
Original assignee: Xiamen Hongfa Electric Power Controls Co Ltd
Current assignee: Xiamen Hongfa Electric Power Controls Co Ltd
Priority date: 2022-10-12
Filing date: 2022-10-12
Publication date: 2023-01-24
Anticipated expiration: 2032-10-12

Abstract

An embodiment of the utility model discloses relay, including contact container, holder, first magnetizer, movable member and first elastic component. The contact container is provided with a contact chamber; at least part of the retainer is arranged in the contact chamber and is fixedly arranged relative to the contact container; the first magnetizer is arranged at the first position and the second position the device is movably connected with the holder; the movable component comprises a movable reed and a second magnetizer, and at least part of the second magnetizer is fixedly connected to one side of the movable reed, which is far away from the first magnetizer; in the first position, the distance between the first magnetizer and the second magnetizer is a first interval, in the second position, the distance between the first magnetizer and the second magnetizer is a second interval, and the first interval is larger than the second interval; the first elastic piece is arranged between the first magnetizer and the retainer, for applying a resilient force to the first magnetically permeable body moving towards the first position.

Description

Zxfoom

Technical Field

The embodiment of the utility model provides a relate to relay technical field particularly, relate to a 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), and is generally applied to an automatic control circuit. Relays are actually "reclosers" that use a smaller current to control a larger 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 in order to solve the problem that contacts of the high-voltage direct-current relay are opened due to electric repulsion generated by short-circuit current, an anti-short-circuit loop electromagnetic structure is generally arranged in the related art. Further, the following type and the fixed type are distinguished according to the position of the upper yoke. Specifically, the follow-up structure means that the upper yoke is provided on the movable assembly of the relay, and the fixed structure means that the upper yoke is provided at a fixed position other than the movable assembly. However, although the short-circuit resistance of the fixed short-circuit resistance structure is greatly enhanced, the breaking capacity is reduced because the short-circuit capacity and the breaking capacity show negative correlation. The follow-up short-circuit resisting structure is influenced by the holding force of the movable iron core, when the short-circuit current is higher, the iron core can be separated to cause the disconnection of the contact, increasing the holding force of the movable iron core requires increasing the coil, which is contradictory to small volume and light weight.

SUMMERY OF THE UTILITY MODEL

An embodiment of the utility model provides a relay to compromise anti short circuit ability and limit breaking capacity.

The utility model provides a relay, including contact container, holder, first magnetizer, movable member and first elastic component, contact container has the contact chamber; at least part of the retainer is arranged in the contact chamber and is fixedly arranged relative to the contact container; the first magnetizer is movably connected to the holder between a first position and a second position; the movable component comprises a movable reed and a second magnetizer, at least part of the second magnetizer is fixedly connected to one side of the movable reed, which is far away from the first magnetizer, and the second magnetizer is used for forming a magnetic conductive loop with the first magnetizer; in the first position, a distance between the first magnetizer and the second magnetizer is a first interval, in the second position, a distance between the first magnetizer and the second magnetizer is a second interval, and the first interval is larger than the second interval; the first elastic piece is arranged between the first magnetizer and the retainer, and an elastic force for applying the first magnetic conductor to move to the first position.

According to some embodiments of the invention, the first magnetizer is located at the first position, the current value of the movable reed is less than or equal to a threshold current;

when the current value of the movable reed is larger than the threshold current, the first magnetizer moves from the first position to the second position.

According to some embodiments of the present invention, the first magnetizer is movably connected with the holder through a limiting structure, the limiting structure is used for limiting the first magnetizer to move between the first position and the second position relative to the retainer.

According to some embodiments of the present invention, the limiting structure comprises:

the limiting groove is arranged on one of the first magnetizer and the retainer and extends along the moving direction of the movable reed; one end of the groove wall of the limit groove, which is close to the second magnetizer, is provided with a stop wall; and

the limiting block is arranged on the other one of the first magnetizer and the retainer, the limiting block is in sliding fit with the limiting groove, and the stopping wall stops at the second position.

According to some embodiments of the invention, in the first position, a first gap is provided between the stopper and a groove wall of the stopper groove;

at the second position, a second gap is formed between the limiting block and the groove wall of the limiting groove;

the first clearance is less than the second gap.

According to some embodiments of the present invention, the relay further comprises a pair of stationary contact terminals connected to the contact container, at least a portion of the stationary contact terminals being located in the contact chamber, and both ends of the movable spring are used for contacting or separating from the pair of stationary contact terminals;

the contact container is also provided with a pair of first through holes and a pair of second through holes, and the first through holes and the second through holes are communicated with the contact chamber; the pair of stationary contact leading-out ends are correspondingly arranged in the pair of first through holes in a penetrating mode;

the relay further comprises a connecting piece, the connecting piece penetrates through the second through hole and comprises a first end and a second end, the first end is connected with the contact container, and the second end is connected with the retainer.

According to some embodiments of the invention, the contact container comprises:

a yoke iron plate; and

the insulating cover comprises a top wall and a side wall, one end of the side wall is connected to the periphery of the top wall in a surrounding mode, and the other end of the side wall is connected to the yoke iron plate;

the first through hole and the second through hole are formed in the top wall, and the first end of the connecting piece is connected with the outer wall surface of the top wall.

According to some embodiments of the present invention, the insulating cover comprises a ceramic cover and a frame piece, the ceramic cover comprises the top wall and the side wall, and the other end of the side wall is connected to the yoke plate through the frame piece;

in the outer wall surface of the top wall, a first metalized layer is arranged at the periphery of the first through hole, and a second metalized layer is arranged at the periphery of the second through hole;

the fixed contact leading-out end is welded with the top wall through the first metalized layer, and the first end of the connecting piece is welded with the top wall through the second metalized layer.

According to some embodiments of the present invention, the top wall and the side wall are of split structures and are connected through welding.

According to some embodiments of the invention, the top wall and the side wall are of unitary construction; or, the retainer is arranged at an interval with the inner wall surface of the top wall.

a yoke iron plate; and

an insulating cover connected to the yoke plate;

the relay further comprises a fixing frame, the fixing frame is arranged in the contact cavity and fixedly connected to the yoke iron plate, and the retainer is fixedly connected to the fixing frame.

According to some embodiments of the invention, the holder comprises:

a first bracket fixedly disposed with respect to the contact receptacle;

the second bracket is detachably connected with the first bracket and surrounds a holding cavity with the first bracket; the first elastic part and the first magnetizer are located in the holding cavity, one side, facing the second support, of the first magnetizer is provided with a holding groove, one end of the first elastic part is abutted to the second support, and the other end of the first elastic part is abutted to the bottom of the holding groove.

According to some embodiments of the invention, the first resilient member is a spring.

According to some embodiments of the present invention, the relay further includes a push rod assembly, the push rod assembly including:

a rod portion movable in an axial direction of the rod portion with respect to the contact container;

the base is arranged at one end of the rod part along the axial direction, and at least part of the base extends into the contact chamber; the movable member is movably connected to the base in the axial direction of the rod portion; and

and the second elastic piece is connected with the movable component and the base and is used for applying elastic force to the movable component to move towards the first magnetizer.

An embodiment of the above utility model has at least the following advantages or beneficial effects:

the utility model discloses relay, on the one hand, first magnetizer sets up at the holder fixed for the contact container for the holding power of first magnetizer is provided by the contact container, can effectively promote the upper limit of anti short circuit current-carrying ability like this, ensures the reliability of anti short circuit. On the other hand, the first magnetizer is movably connected with the holder, so that the distance between the first magnetizer and the second magnetizer can be adjusted according to the magnitude of the current value, and then change the magnetic attraction size that produces between first magnetizer and the second magnetizer, when satisfying anti short-circuit, also can satisfy the disconnected requirement of overload.

Drawings

Fig. 1 is a schematic perspective view of a relay according to an embodiment of the present invention, in which a housing, an electromagnet unit, and an arc extinguishing unit are omitted.

Fig. 2 shows a schematic top view of fig. 1.

Fig. 3 shows a cross-sectional view of M-M in fig. 1.

Fig. 4 shows a perspective view of fig. 1 with the ceramic cover and frame piece removed.

Fig. 5 shows an exploded view of fig. 1.

Fig. 6 shows a cross-sectional view N-N of fig. 1 with the ceramic cover and the frame piece omitted and the first magnetic conductor in the first position.

Fig. 7 shows a partial enlarged view at X in fig. 6.

Fig. 8 shows a cross-sectional view N-N of fig. 1 with the ceramic cover and the frame piece omitted and the first magnetic conductor in the second position.

Fig. 9 shows a partial enlarged view at Y in fig. 8.

Fig. 10 shows a partial enlarged view at P in fig. 4.

Fig. 11 shows a schematic view of the holder fixedly connected to the holder.

Fig. 12 is an exploded schematic view of a relay according to an embodiment of the present invention.

Fig. 13 is an exploded view of the first bracket, the second bracket, and the first magnetic conductor.

Wherein, the reference numerals are illustrated below:

10. a contacting vessel; 101. a contact chamber; 102. a first through hole; 103. a second through hole; 11a, an insulating cover; 11. a ceramic cover; 111. a top wall; 112. side wall (ii) a; 113. a first metallization layer; 114. a second metallization layer; 12. a frame piece; 13. a yoke iron plate; 131. a third through hole; 20. a stationary contact leading-out terminal; 30. a connecting member; 31. a first end of a connector; 32. a second end of the connector; 40. a first magnetizer; 401. a guide groove; 41. accommodating grooves; 42. a holder; 421. a first bracket; 422. a second bracket; 423. a holding chamber; 424. a hook is clamped; 425. a clamping hole; 426. a guide portion; 43. a limiting structure; 431. a limiting groove; 432. a limiting block; 433. a stopper wall; 434. a limiting wall; 435. wall of the tank (ii) a; 44. a first elastic member; 50. a push rod assembly; 51. a rod portion; 52. a base; 53. a movable member; 54. a movable spring plate; 55. a second magnetizer; 56. a second elastic member; 57. a sliding structure; 571. a limiting part; 572. a limiting hole; 70. a fixed mount; 1100. a housing; 1110. first of all a housing; 1120. a second housing; 1130. exposing holes; 1200. electromagnet a unit; 1210. a bobbin; 1220. a coil; 1240. a movable iron core; 1250. resetting piece (ii) a; 1300. an arc extinguishing unit; 1310. an arc extinguishing magnet; 1320. a yoke iron clamp; 1400. a sealing unit; 1410. a metal cover; p1, a first position; p2, second position; h1, a first interval; h2, second pitch; d1, the motion direction; d2, the length direction.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed description will be omitted.

As shown in fig. 12, fig. 12 is an exploded schematic view of a relay according to an embodiment of the present invention. The relay includes a case 1100, an electromagnet unit 1200, an arc extinguishing unit 1300, and a sealing unit 1400. The sealing unit 1400 is disposed in the housing 1100, and the top of the stationary contact terminal of the sealing unit 1400 is exposed to the outer surface of the housing 1100 through the exposure hole 1130 of the housing 1100. The electromagnet unit 1200 and the arc extinguishing unit 1300 are both disposed within the housing 1100.

As an example, the casing 1100 includes a first case 1110 and a second case 1120, and the first case 1110 and the second case 1120 are snapped to form a chamber for accommodating the electromagnet unit 1200, the arc extinguishing unit 1300, and the sealing unit 1400.

The arc extinguishing unit 1300 is used to extinguish an arc generated between the stationary contact terminal of the sealing unit 1400 and the movable spring.

As an example, the arc extinguishing unit 1300 includes two arc extinguishing magnets 1310. The quenching magnets 1310 may be permanent magnets, and each quenching magnet 1310 may have a substantially rectangular parallelepiped shape. The two quenching magnets 1310 are respectively disposed on both sides of the sealing unit 1400, and are disposed to face each other along the longitudinal direction D2 of the movable spring.

By providing two opposing quenching magnets 1310, a magnetic field can be formed around the stationary contact terminal and the movable contact spring. Therefore, the arc generated between the stationary contact leading end and the movable spring piece is elongated in the direction away from each other by the action of the magnetic field, and arc extinction is realized.

The arc extinguishing unit 1300 further includes two yoke clips 1320, two yoke clips 1320 are provided corresponding to the positions of the two quenching magnets 1310. Also, two yoke clips 1320 surround the sealing unit 1400 and the two quenching magnets 1310. By surrounding the arc extinguishing magnet 1310 with the yoke clamp 1320, the magnetic field generated by the arc extinguishing magnet 1310 is prevented from diffusing outward and affecting the arc extinguishing effect. Yoke clip 1320 is made of a soft magnetic material. Soft magnetic materials may include, but are not limited to, iron, cobalt, nickel, alloys thereof, and the like.

As shown in fig. 1 to 5, fig. 1 is a schematic perspective view of a relay according to an embodiment of the present invention, in which a housing, an electromagnet unit, and an arc extinguishing unit are omitted. Fig. 2 shows a schematic top view of fig. 1. Fig. 3 shows a cross-sectional view of M-M in fig. 1. Fig. 4 shows a perspective view of fig. 1 with the ceramic cover 11 and the frame piece 12 removed. Fig. 5 shows an exploded view of fig. 1.

The sealing unit 1400 of the embodiment of the present invention includes a contact container 10, a pair of stationary contact terminals 20, a push rod assembly 50, a holder 42, a first magnetic conductor 40, and a first elastic member 44.

It is to be understood that the terms "comprises" and "comprising," and any variations thereof, in the embodiments of the present invention, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or may alternatively include other steps or elements inherent to such process, method, article, or apparatus.

The contact vessel 10 has a contact chamber 101 inside. The contact receptacle 10 may include an insulation cover 11a and a yoke plate 13, the insulation cover 11a being covered on one side of the yoke plate 13, the insulation cover 11a and the yoke plate 13 together enclosing a contact chamber 101.

The insulating cover 11a includes a ceramic cover 11 and a frame piece 12. The ceramic cover 11 is connected to the yoke plate 13 via a frame piece 12. The frame piece 12 may be a metal piece with a ring structure, such as iron-nickel alloy, and one end of the frame piece 12 is connected to the opening edge of the ceramic cover 11, for example, by laser welding, soldering, resistance welding, gluing, etc. The other end of the frame piece 12 is connected to the yoke plate 13, it is also possible to use laser welding, soldering, resistance welding, gluing, etc. A frame piece 12 is provided between the ceramic cover 11 and the yoke plate 13 to facilitate the connection between the ceramic cover 11 and the yoke plate 13.

The ceramic cover 11 includes a top wall 111 and a side wall 112, one end of the side wall 112 is connected around the top wall 111, and the other end of the side wall 112 is connected to the yoke plate 13 through the frame piece 12. In the present embodiment, the other end of the side wall 112 is connected to the yoke plate 13 via the frame piece 12.

The contact container 10 also has a pair of first and second through

holes

102 and 103, and the first and second through

holes

102 and 103 are communicated with the contact chamber 101. The first through hole 102 is used for the stationary contact leading-out terminal 20 to penetrate through, and the second through hole 103 is used for a connecting piece 30 to penetrate through.

As an example, the first through hole 102 and the second through hole 103 are opened in the top wall 111 of the ceramic cover 11. The second through hole 103 may be provided between the two first through holes 102, i.e., the connector 30 is provided between the pair of stationary contact terminals 20.

A pair of stationary contact terminals 20 are attached to the contact receptacle 10, with at least a portion of each stationary contact terminal 20 being located within the contact chamber 101. One of the pair of stationary contact terminals 20 serves as a terminal into which current flows, and the other serves as a terminal from which current flows.

The pair of stationary contact terminals 20 are inserted into the pair of first through holes 102 in a one-to-one correspondence, and are connected to the top wall 111 of the ceramic cover 11, for example, by welding.

The bottom of the stationary contact terminal 20 serves as a stationary contact, and the stationary contact may be integrally or separately provided at the bottom of the stationary contact terminal 20.

At least part of the holder 42 is arranged in the contact chamber 101 and is fixedly arranged relative to the contact container 10 for connecting the first magnetizer 40.

As shown in fig. 5 and 13, fig. 13 is an exploded schematic view of the first bracket, the second bracket, and the first magnetizer. As an example, the holder 42 may include a first bracket 421 and a second bracket 422. The first support 421 is fixedly arranged relative to the contact container 10, and the second support 422 is detachably connected to the first support 421 and encloses a holding cavity 423 with the first support 421, wherein the holding cavity 423 is used for accommodating the first magnetizer 40 and the first elastic member 44.

It will be appreciated that the first bracket 421 and the second bracket 422 are detachably connected and enclose a holding cavity 423 for accommodating the first magnetic conductor 40 and the first elastic member 44, which facilitates both the fixed mounting of the holder 42 with respect to the contact receptacle 10 and the fitting of the first magnetic conductor 40 and the first elastic member 44 into the holding cavity 423.

As an example, the first support 421 and the second support 422 may be connected by the hook 424 and the hook hole 425, but not limited thereto. For example, the hook 424 may be disposed on one of the first bracket 421 and the second bracket 422, and the hook hole 425 may be disposed on the other of the first bracket 421 and the second bracket 422.

The first magnetic conductor 40 is disposed in the contact chamber 101 and movably connected to the holder 42 between a first position P1 and a second position P2.

Referring to fig. 13, a guiding structure is disposed between the first magnetizer 40 and the holder 42, and the guiding structure is used to guide the first magnetizer 40 to move between the first position P1 and the second position P2 relative to the holder 42, so as to prevent the first magnetizer 40 from shaking.

As an example, the guiding structure includes a guiding portion 426 and a guiding slot 401, and the guiding portion 426 may be disposed in the guiding slot 401 and slidably engaged with the guiding slot 401. The guide portion 426 may be provided on one of the first magnetizer 40 and the holder 42, and the guide groove 401 may be provided on the other of the first magnetizer 40 and the holder 42.

In the present embodiment, the guide portion 426 is provided on the first bracket 421, and the guide groove 401 is provided in the first magnetizer 40.

Of course, in other embodiments, the guide portion 426 may be provided on the first magnetic conductor 40, and the guide groove 401 may be provided on the first bracket 421.

The push rod assembly 50 is movably connected to the touch receptacle 10 in the axial direction of the rod (i.e., in the moving direction D1). The push rod assembly 50 may include a rod portion 51, a base 52, a movable member 53, and a second elastic member 56.

The yoke plate 13 has third through holes 131, the third through holes 131 penetrate through both opposite sides of the yoke plate 13 in a thickness direction of the yoke plate 13, and the third through holes 131 communicate with the contact chamber 101 of the contact receptacle 10. The rod 51 is axially movably inserted through the third through hole 131. One axial end of the stem 51 is provided with a seat 52, and at least part of the seat 52 is located in the contact chamber 101.

The movable member 53 is movably connected to the base 52 in the axial direction of the rod portion 51. The movable member 53 includes a movable spring 54 and a second magnetic conductor 55, and at least a part of the second magnetic conductor 55 is fixedly connected to a side of the movable spring 54 facing away from the first magnetic conductor 40. That is, the movable spring 54 is located between the first magnetic conductor 40 and at least a part of the second magnetic conductor 55 in the axial direction of the rod portion 51.

As an example, the second magnetic conductor 55 and the movable spring 54 may be fixedly connected by a rivet, but not limited thereto.

It is understood that the first magnetizer 40 and the second magnetizer 55 may be made of iron, cobalt, nickel, and alloys thereof.

In one embodiment, the first magnetic conductor 40 may be a straight line, and the second magnetic conductor 55 may be a U-shaped, but not limited thereto. It is understood that each of the first and second

magnetic conductors

40 and 55 may include a plurality of stacked magnetic conductive sheets.

Both ends of movable contact spring 54 are adapted to contact the bottoms of a pair of stationary contact terminals 20 to effect contact closure. Both ends of the movable spring 54 in the length direction D2 thereof may serve as movable contacts. The movable contact at the two ends of the movable contact spring 54 may protrude from other parts of the movable contact spring 54 or may be flush with the other parts.

It is understood that the movable contact may be integrally or separately provided at both ends of the movable spring 54 in the length direction D2 thereof.

The second elastic member 56 is connected to the movable member 53 and the base 52, and is configured to apply an elastic force to the movable member 53 to move toward the stationary contact terminal 20/the first magnetic conductor 40.

As an example, one end of the second elastic member 56 abuts against the base 52, and the other end abuts against the second magnetizer 55 of the movable member 53. Of course, in other embodiments, the second magnetic conductor 55 may be provided with a through hole, and the other end of the second elastic member 56 passes through the through hole of the second magnetic conductor 55 and abuts against the movable spring 54.

The first elastic member 44 and the first magnetizer 40 may be both located in the holding chamber 423, the first elastic member 44 may be disposed between the first magnetizer 40 and the holder 42, for applying an elastic force to the first magnetizer 40 to move to the first position P1.

One side of the first magnetizer 40 facing the second bracket 422 is provided with an accommodating groove 41, one end of the first elastic member 44 abuts against the second bracket 422, and the other end abuts against the bottom of the accommodating groove 41.

It is understood that the first elastic member 44 and the second elastic member 56 may be both springs, but not limited thereto.

As shown in fig. 5, the push rod assembly 50 further includes a sliding structure 57, the sliding structure 57 is connected to the base 52 and the movable member 53, and the movable member 53 is slidable with respect to the base 52 through the sliding structure 57. The sliding structure 57 includes a stopper hole 572 and a stopper part 571 that are engaged with each other. The stopper 571 slidably extends into the stopper hole 572.

In the present embodiment, the base 52 is directly connected to the movable member 53 through the stopper 57, so that the assembly between the base 52 and the movable member 53 is simpler. Also, since the remaining parts do not exist above the movable member 53, the remaining parts are prevented from moving to interfere with the first magnetizer 40 during the overtravel.

It is understood that the limiting hole 572 may be a through hole or a blind hole.

For example, the base 52 is provided with a stopper hole 572, and the movable member 53 is provided with a stopper portion 571. Further, a limiting portion 571 is disposed on the second magnetic conductor 55.

Of course, in other embodiments, the push rod assembly 50 may have other configurations known in the art, and are not described in detail herein.

With reference to fig. 5 and fig. 12, the sealing unit 1400 further includes a metal cover 1410, the metal cover 1410 is connected to a side of the yoke plate 13 facing away from the insulating cover 11a, and the metal cover 1410 covers the third through hole 131 on the yoke plate 13. The metal cover 1410 and the yoke plate 13 define a chamber for accommodating a stationary core and a movable core 1240 of the electromagnet unit 1200, which will be described in detail below.

The electromagnet unit 1200 includes a bobbin 1210, a coil 1220, a stationary core, a movable core 1240, and a restoring member 1250. The bobbin 1210 has a hollow cylindrical shape and is formed of an insulating material. The metal cap 1410 is inserted into the bobbin 1210. A coil 1220 surrounds the bobbin 1210. The static iron core is fixedly arranged in the metal cover 1410, and part of the static iron core extends into the third through hole 131. The stationary iron core has a through hole, and the through hole is arranged corresponding to the position of the third through hole 131, and is used for the rod part 51 to penetrate through. A movable core 1240 is movably disposed within the metal cover 1410 and is disposed opposite the stationary core, the movable core 1240 connecting the rod portion 51 for attraction by the stationary core when the coil 1220 is energized. The plunger 1240 and the shaft 51 may be screwed, riveted, welded, or otherwise connected.

A reset member 1250 is positioned inside the metal cover 1410 and is disposed between the stationary core and the movable core 1240 for resetting the movable core 1240 when the coil 1220 is de-energized. The restoring member 1250 may be a spring and is sleeved outside the rod part 51.

It should be noted that when the coil 1220 is energized, the plunger 1240 can drive the push rod assembly 50 to move upward through the rod 51. When the movable member 53 contacts the stationary contact terminal 20, the movable member 53 is stopped by the stationary contact terminal 20, and the lever 51 and the base 52 still move upward until the over-stroke is completed.

As shown in fig. 6 and 9, fig. 6 is a cross-sectional view of N-N in fig. 2, in which the ceramic cover and the frame piece are omitted and the first magnetic conductor 40 is in the first position P1. Fig. 7 shows a partial enlarged view at X in fig. 6. Fig. 8 shows a cross-sectional view N-N of fig. 2, with the ceramic cover and the frame piece omitted and the first magnetic conductor 40 in the second position P2. Fig. 9 shows a partial enlarged view at Y in fig. 8. In the first position P1, the distance between the first magnetic conductor 40 and the second magnetic conductor 55 is the first distance H1. In the second position P2, the distance between the first magnetic conductor 40 and the second magnetic conductor 55 is a second distance H2, and the first distance H1 is greater than the second distance H2.

It should be noted that, the utility model discloses movable contact 54 locates between first magnetizer 40 and the second magnetizer 55, when movable contact 54's both ends and a pair of stationary contact draw-off end 20 contact, form a magnetic conduction return circuit that encircles movable contact 54 between first magnetizer 40 and second magnetizer 55, thereby produce along the ascending magnetic attraction force of contact pressure direction between first magnetizer 40 and second magnetizer 55, this magnetic attraction force can resist movable contact 54 and stationary contact draw-off end 20 between because of the electronic repulsion that short circuit current produced, ensure that movable contact 54 and stationary contact draw-off end 20 do not take place to bounce.

It is understood that, when the value of the current flowing through the movable spring 54 is constant, the magnitude of the magnetic attraction force generated between the first magnetic conductor 40 and the second magnetic conductor 55 is inversely proportional to the distance between the first magnetic conductor 40 and the second magnetic conductor 55, and the smaller the distance is, the larger the magnetic attraction force is generated.

If the movable contact spring 54 is prevented from springing away from the stationary contact terminal 20 in order to resist the electric repulsive force generated by the short-circuit current, the distance between the first magnetic conductor 40 and the second magnetic conductor 55 should be designed to be small, so that the magnetic attractive force between the first magnetic conductor 40 and the second magnetic conductor 55 can be increased.

If in order to realize timely breaking, the distance between the first magnetizer 40 and the second magnetizer 55 should be designed to be larger, so as to reduce the magnetic attraction between the first magnetizer 40 and the second magnetizer 55, and avoid the influence of the too large magnetic attraction on timely breaking.

It can be seen that, when the distance between the first magnetizer 40 and the second magnetizer 55 is a certain value, both the short-circuit resistance and the limit breaking capacity cannot be taken into consideration.

In this embodiment, the first magnetizer 40 is movably disposed, so that the distance between the first magnetizer 40 and the second magnetizer 55 can be adjusted according to the magnitude of the current value, and the magnetic attraction force generated between the first magnetizer 40 and the second magnetizer 55 is changed, thereby considering the short-circuit current resistance and the limit breaking.

Specifically, as shown in fig. 6 and 7, the relay is in a normal operation state, and the movable contact spring 54 has a current value equal to or less than a threshold current, for example, a current value equal to or less than 2000A. Since the current value is smaller at this time, the magnetic attraction force between the first magnetic conductor 40 and the second magnetic conductor 55 is also smaller, and the magnetic attraction force is smaller than the magnitude of the elastic pre-pressure of the first elastic member 44 at this time. Thus, the elastic force of the first elastic member 44 can cancel the magnetic attraction force between the first magnetic conductor 40 and the second magnetic conductor 55, and the first magnetic conductor 40 is held at the first position P1. When the first magnetizer 40 is located at the first position P1, a distance between the first magnetizer 40 and the second magnetizer 55 is a first interval H1. For example, the first distance H1 may be 1.5mm, but is not limited thereto.

It will be appreciated that the magnitude of the threshold current described above may be adjusted for different types of relays. For example: if the maximum breaking current of the relay is larger, the threshold current may also be set larger, so as to ensure that the first magnetic conductor 40 is still kept at the first position P1 and does not move to the second position P2 under the normal working state of the relay.

As shown in fig. 8 and 9, when the current value flowing through the movable spring 54 is larger than the threshold current, the current is larger than 2000A, for example, and since the magnetic attraction force between the first magnetizer 40 and the second magnetizer 55 is proportional to the magnitude of the current value, the larger the current value is, the larger the magnetic attraction force between the first magnetizer 40 and the second magnetizer 55 is. When the magnetic attraction is larger than the elastic pre-pressure of the first elastic member 44, the first magnetic conductor 40 is attracted by the magnetic attraction and moves toward the second magnetic conductor 55, so that the distance between the first magnetic conductor 40 and the second magnetic conductor 55 becomes smaller. And because the size of the magnetic spacing is inversely proportional to the size of the magnetic attraction force, namely the smaller the magnetic spacing is, the larger the magnetic attraction force is. When a short-circuit current (much larger than a threshold current) flows, a larger magnetic attraction force is generated between the first magnetizer 40 and the second magnetizer 55, and the magnetic attraction force can compress the first elastic member 44 to move the first magnetizer 40 to the second position P2, where a distance between the first magnetizer 40 and the second magnetizer 55 is the second distance H2. The second distance H2 is smaller than the first distance H1, and the distance becomes smaller, so that the magnetic attraction force between the first magnetizer 40 and the second magnetizer 55 becomes larger. Therefore, the first magnetic conductor 40 can attract the second magnetic conductor 55 by the large magnetic attraction force, and the magnetic attraction force can resist the electric repulsive force generated by the short-circuit current, thereby ensuring that the movable contact piece 54 does not bounce off the stationary contact terminal 20.

Therefore, the utility model discloses relay, on the one hand, first magnetizer 40 sets up at the holder 42 fixed for contact container 10 for first magnetizer 40's holding power is provided by contact container 10, can effectively promote the upper limit of anti short circuit current-carrying capacity like this, ensures the reliability of anti short circuit. On the other hand, the first magnetizer 40 is movably connected to the holder 42, so that the distance between the first magnetizer 40 and the second magnetizer 55 can be adjusted according to the magnitude of the current value, and further the magnetic attraction force generated between the first magnetizer 40 and the second magnetizer 55 is changed, and the requirement of overload breaking can be met while the short circuit resistance is met.

It should be noted that, during the process of moving the first magnetic conductor 40 from the first position P1 to the second position P2, the first elastic member 44 is gradually compressed, so that the reverse elastic force exerted by the first elastic member 44 on the first magnetic conductor 40 is gradually increased. When the current value flowing through movable spring 54 is larger than the threshold current but does not reach the short-circuit current, the gradually increasing reverse elastic force causes first magnetic conductor 40 to be held at a position intermediate between first position P1 and second position P2. When the current value of the movable reed 54 reaches the short-circuit current, a larger magnetic attraction force is generated between the first magnetic conductor 40 and the second magnetic conductor 55, and the magnetic attraction force is enough to overcome the reverse elastic force of the first elastic member 44, so that the first magnetic conductor 40 continues to move to the second position P2 and continues to compress the first elastic member 44 until the first magnetic conductor 40 moves to the second position P2.

As shown in fig. 5 and 10, fig. 10 is a partially enlarged view at P in fig. 4. The first magnetizer 40 is movably connected to the holder 42 through a limiting structure 43, and the limiting structure 43 is used for limiting the first magnetizer 40 to move between a first position P1 and a second position P2 relative to the holder 42.

The limiting structure 43 includes a limiting groove 431 and a limiting block 432. A limiting groove 431 is provided in one of the first magnetic conductor 40 and the holder 42, and the limiting groove 431 extends in the moving direction D1 of the movable spring 54. The limiting block 432 is disposed on the other one of the first magnetizer 40 and the holder 42, and the limiting block 432 is slidably engaged with the limiting groove 431.

In the present embodiment, the stopper groove 431 is formed on the holder 42, and more specifically, the stopper groove 431 is formed on the first bracket 421. The limiting block 432 is formed on the first magnetizer 40, and specifically, the limiting block 432 is protruded on the sidewall of the first magnetizer 40.

Of course, in other embodiments, the limiting groove 431 may also be formed on the first magnetic conductor 40, and the limiting block 432 is formed on the holder 42.

When the first magnetic conductor 40 is at the first position P1, a first gap is formed between the limiting block 432 and the groove wall 435 of the limiting groove 431. When the first magnetic conductor 40 is at the second position P2, a second gap is formed between the limiting block 432 and the groove wall 435 of the limiting groove 431. The first gap is smaller than the second gap.

Since the first gap is smaller than the second gap, the size of the position-limiting groove 431 is "one end is larger and the other end is smaller", so that the gap between the position-limiting block 432 and the groove wall 435 of the position-limiting groove 431 is increased when the first magnetizer 40 moves from the first position P1 to the second position P2, and the friction and the jamming between the position-limiting block 432 and the groove wall of the position-limiting groove 431 can be prevented.

As shown in fig. 8 and 9, one end of the groove wall of the stopper groove 431 near the second magnetic conductor 55 has a stopper wall 433. When the first magnetic conductor 40 moves to the second position P2, the stop wall 433 stops at the stop block 432. At this time, the distance between the first magnetizer 40 and the second magnetizer 55 is the second distance H2, and the stopping wall 433 stops at the limiting block 432, so that the first magnetizer 40 is fixed relative to the contact container 10, and thus, a stable and reliable magnetic attraction force can be provided for the second magnetizer 55, and the requirement of short circuit resistance is met.

It can be understood that, when the first magnetic conductor 40 moves to the second position P2, that is, the stopping wall 433 stops at the limiting block 432, the first magnetic conductor 40 and the second magnetic conductor 55 may be attached to each other, or may be disposed at an interval. When the first magnetic conductor 40 is attached to the second magnetic conductor 55, the second distance H2 may be considered equal to zero.

As shown in fig. 6 and 7, when the first magnetic conductor 40 is located at the first position P1, under the action of the elastic force of the first elastic member 44, the first magnetic conductor 40 abuts against the first bracket 421 of the holder 42, and the limit block 432 is disposed at an interval from the limit wall 434 of the limit groove 431.

Of course, in other embodiments, the way in which the first magnetic conductor 40 is held at the first position P1 in the holder 42 may be: under the elastic force of the first elastic member 44, the limiting block 432 may abut against another limiting wall 434 opposite to the stopping wall 433 in the limiting groove 431, so that the first magnetic conductor 40 is stably held in the holder 42.

As shown in fig. 5, 6 and 8, the relay further includes a connecting member 30, the connecting member 30 is disposed through the second through hole 103 and includes a first end 31 and a second end 32, the first end 31 is connected to the contact container 10, and the second end 32 is connected to the holder 42.

In this embodiment, the second end 32 of the connecting member 30 is connected to the first bracket 421.

The contact container 10 is provided with a second through hole 103, the connecting piece 30 is arranged through the second through hole 103, so that the connecting piece 30 is connected with the contact container 10, and the retainer 42 is connected with the connecting piece 30. The holder 42 is connected to the contact container 10 through the connecting member 30, and is not directly connected to the contact container 10, so that the connection process is not blocked and visualized, the operation is convenient, and the reliability of the connection is ensured.

Further, the first through hole 102 and the second through hole 103 are opened on the top wall 111 of the ceramic cover 11, and the first end 31 of the connecting member 30 is connected to the outer wall surface of the top wall 111.

In the outer wall surface of the top wall 111, a first metallization layer 113 is provided around the first through hole 102, and a second metallization layer 114 is provided around the second through hole 103. The stationary contact terminal 20 is welded to the top wall 111 through the first metallization 113, and the first end 31 of the connector 30 is welded to the top wall 111 through the second metallization 114.

The outer wall surface of the ceiling wall 111 of the ceramic cover 11 is more likely to form a welding plane than the inner wall surface of the ceramic cover 11. Further, since the top wall 111 of the ceramic cover 11 needs to be provided with the stationary contact terminal 20, and a metalized layer needs to be provided around the first through hole 102 when the stationary contact terminal 20 is welded to the top wall 111, the second metalized layer 114 of the second through hole 103 is also processed when the first metalized layer 113 of the first through hole 102 is processed. Therefore, by welding the connecting member 30 to the outer wall surface of the top wall 111 of the ceramic cover 11, it is possible to process the metalized layer only on the outer wall surface of the top wall 111 without processing the metalized layer on the inner wall surface of the top wall 111, which facilitates the processing and simplifies the processing steps.

The holder 42 is spaced apart from the inner wall surface of the top wall 111. The retainer 42 is spaced from the inner wall surface of the top wall 111, so that a gap is formed between the retainer 42 and the inner wall surface of the top wall 111. Since the holder 42 does not directly contact the inner wall surface of the top wall 111, the arrangement of the holder 42 does not affect the creepage distance of the pair of stationary contact terminals 20.

The top wall 111 and the side wall 112 are separate structures and are connected by welding.

It will be appreciated that the connection of the connection member 30 to the top wall 111 is facilitated by designing the ceramic cover 11 as a separate structure of the top wall 111 and the side wall 112. Of course, the top wall 111 and the side wall 112 may be adhered to each other.

Specifically, since the top wall 111 is sheet-shaped, the sheet-shaped structure makes it easier to machine the first via hole 102, the second via hole 103, the first metallization layer 113, and the second metallization layer 114 on the top wall 111. Further, the plate-like structure also makes it easier to perform welding of the connector 30 and the top wall 111 and welding of the stationary contact terminal 20 and the top wall 111.

Of course, the top wall 111 and the side wall 112 may be of a unitary construction.

The second end 32 of the connecting member 30 may be connected to the holder 42 in various ways, such as welding, riveting, gluing, etc.

As shown in fig. 11, fig. 11 is a schematic view illustrating that the holder 42 is fixedly coupled to the fixing frame 70. In addition to the above-described manner in which the holder 42 is fixedly connected to the ceramic cover 11, the holder 42 may be fixedly arranged with respect to the contact container 10, and the holder 42 may be fixedly connected to a fixing frame 70.

Specifically, the relay further includes a fixing bracket 70, and the fixing bracket 70 is disposed in the contact chamber 101 and fixedly connected to the yoke plate 13. The holder 42 is fixedly coupled to the fixing frame 70. For example, the first support 421 of the holder 42 is riveted to the fixing frame 70, but not limited thereto.

It is understood that the various embodiments/implementations provided by the present invention can be combined without contradiction, and are not illustrated herein.

In the embodiments of the present invention, the terms "first", "second", "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the terms "a" and "an" are used merely to introduce a technical feature and not to limit the technical feature to a particular number unless specifically defined otherwise; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meaning of the above terms in the embodiments of the present invention can be understood by those skilled in the art according to specific situations.

In the description of the embodiments of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description of the embodiments of the present invention and simplification of the description, but do not indicate or imply that the device or unit indicated must have a specific orientation, be constructed and operated in a specific orientation, and therefore, should not be construed as limiting the embodiments of the present invention.

In the description of the present specification, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means 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 an embodiment of the invention. In this specification, the schematic representations of the terms used above do not necessarily 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.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made to the present invention by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the embodiments of the present invention should be included in the scope of the embodiments of the present invention.

Claims

1. A relay, comprising:

a contacting vessel having a contacting chamber;

the holder is at least partially arranged in the contact chamber and is fixedly arranged relative to the contact container;

a first magnetizer movably connected to the holder between a first position and a second position;

the movable component comprises a movable reed and a second magnetizer, at least part of the second magnetizer is fixedly connected to one side of the movable reed, which is far away from the first magnetizer, and the second magnetizer is used for forming a magnetic conductive loop with the first magnetizer; in the first position, a distance between the first magnetizer and the second magnetizer is a first interval, in the second position, a distance between the first magnetizer and the second magnetizer is a second interval, and the first interval is larger than the second interval; and

and the first elastic part is arranged between the first magnetizer and the retainer and used for applying elastic force to the first magnetizer to move to the first position.

2. The relay according to claim 1, wherein said first magnetic conductor is located at said first position, and a value of a current flowing through said movable spring is equal to or less than a threshold current;

3. The relay according to claim 1, wherein said first magnetic conductor is movably connected to said cage by a limiting structure for limiting movement of said first magnetic conductor relative to said cage between said first position and said second position.

4. The relay according to claim 3, wherein the limiting structure comprises:

the limiting groove is arranged on one of the first magnetizer and the retainer and extends along the moving direction of the movable reed; one end of the groove wall of the limiting groove, which is close to the second magnetizer, is provided with a stopping wall; and

5. The relay according to claim 4, wherein in the first position, the stopper has a first gap with a groove wall of the stopper groove;

the first gap is smaller than the second gap.

6. The relay according to claim 1, further comprising a pair of stationary contact terminals connected to the contact container, at least a portion of the stationary contact terminals being located in the contact chamber, both ends of the movable spring being adapted to be brought into contact with or separated from the pair of stationary contact terminals;

the contact container is also provided with a pair of first through holes and a pair of second through holes, and the first through holes and the second through holes are communicated with the contact chamber; the pair of stationary contact leading-out ends are correspondingly arranged in the pair of first through holes in a penetrating manner one by one;

7. The relay according to claim 6, wherein the contact container comprises:

a yoke iron plate; and

8. The relay according to claim 7, wherein said insulating cover comprises a ceramic cover and a frame piece, said ceramic cover comprising said top wall and said side wall, the other end of said side wall being connected to said yoke plate by said frame piece;

9. The relay according to claim 7, wherein said top wall and said side wall are of a split construction and are joined by welding.

10. The relay according to claim 7, wherein said top wall and said side wall are of unitary construction; or, the retainer is arranged at an interval with the inner wall surface of the top wall.

11. The relay according to claim 1, wherein the contact container comprises:

a yoke iron plate; and

an insulating cover connected to the yoke plate;

12. The relay according to claim 1, wherein the holder comprises:

a first bracket fixedly disposed with respect to the contact receptacle;

the second bracket is detachably connected to the first bracket and surrounds a holding cavity with the first bracket; the first elastic part and the first magnetizer are located in the holding cavity, one side, facing the second support, of the first magnetizer is provided with a holding groove, one end of the first elastic part is abutted to the second support, and the other end of the first elastic part is abutted to the bottom of the holding groove.

13. The relay according to claim 1, wherein the first elastic member is a spring.

14. The relay according to claim 1, further comprising a push rod assembly, the push rod assembly comprising:

the base is arranged at one end of the rod part along the axial direction, and at least part of the base extends into the contact chamber; the movable member is movably connected to the base in an axial direction of the rod portion; and