CN218039042U - Contact structure for improving contact stability and high-voltage direct-current relay - Google Patents

Abstract

The utility model discloses a contact structure and high-voltage direct-current relay for improving contact stability, the contact structure comprises two static contacts and a moving contact, and two ends of the moving contact respectively correspond to the two static contacts; the two fixed contacts and the moving contact are in line contact in a contact state respectively, the line contact direction of one fixed contact and the moving contact is consistent with the length direction of the moving contact, and the line contact direction of the other fixed contact and the moving contact is consistent with the width direction of the moving contact. The utility model discloses a two static contacts change line contact into by current point contact with the moving contact, have reduced the contact resistance and the electric repulsion between the contact of static contact and moving contact, and the contact coverage area of two static contacts and moving contact forms triangle-shaped region, make two static contacts more stable with the moving contact.

Description

Contact structure for improving contact stability and high-voltage direct-current relay

Technical Field

The utility model relates to a relay especially relates to a promote contact structure and high-voltage direct-current relay of contact stability.

Background

A relay is an electronic control device having a control system (also known as an input loop) and a controlled system (also known as an output loop), typically used in an automatic control circuit, which is actually an "automatic switch" that uses a relatively small current to control a relatively large current. Therefore, the circuit has the functions of automatic regulation, safety protection, circuit conversion and the like. The high-voltage direct-current relay is one of the relays, most of the existing high-voltage direct-current relays adopt a moving contact direct-acting structure, namely, two static contacts are matched with one moving contact, and according to the vehicle-mounted practical application, on one hand, the contacts need to be broken under load, so that the switching function is realized, the contact can be subjected to arc ablation in the process, the more serious the arc ablation is, and the shorter the service life of the relay is. On the other hand, the contacts need to be continuously current carrying after being turned "on". Along with the requirement of the new energy automobile for increasing the endurance mileage, the heat loss of the high-voltage direct-current relay under the current-carrying working condition is required to be reduced. Under the frame requirements of small size and low power consumption of customers, the ampere-turn value of the coil cannot be improved, and the contact resistance of the contact cannot be reduced only by increasing the contact pressure.

SUMMERY OF THE UTILITY MODEL

The utility model provides a contact structure and a high voltage direct current relay for improving the contact stability, aiming at the technical problems in the prior art, which achieves the purposes of reducing the contact resistance and the electric repulsion between a static contact and a moving contact by improving the contact form between the static contact and the moving contact; the breaking capacity and the contact stability are improved.

The utility model provides a technical scheme that its technical problem adopted is: a contact structure for improving contact stability comprises two fixed contacts and a movable contact, wherein two ends of the movable contact respectively correspond to the two fixed contacts; the two fixed contacts and the moving contact are in line contact in a contact state respectively, the line contact direction of one fixed contact and one end of the moving contact is consistent with the length direction of the moving contact, and the line contact direction of the other fixed contact and the other end of the moving contact is consistent with the width direction of the moving contact.

Furthermore, one end of the moving contact is provided with a first convex part protruding upwards, and one end of the moving contact is in line contact fit with one of the static contacts through the first convex part; and the other end of the moving contact is provided with a second convex part protruding upwards, and the other end of the moving contact is in line contact fit with the other static contact through the second convex part.

Furthermore, the upper surface of the first convex part, which is used for being in line contact fit with one of the fixed contacts, is an upward-convex first arc surface, and two ends of the first arc surface are located in the width direction of the movable contact; the upper surface of the second convex part, which is in line contact fit with the other fixed contact, is a convex second cambered surface, and two ends of the second cambered surface are positioned in the length direction of the moving contact; the two ends of the second convex part in the width direction of the moving contact are respectively provided with a third cambered surface which is used for bearing the second cambered surface and protrudes outwards, and the third cambered surface is used for guiding the arc generated by the disjunction of the other static contact and the moving contact to move along the width of the moving contact in the direction far away from the second convex part; and the surface of the static contact, which is used for being in contact with the first convex part or the second convex part, is a plane.

The movable contact is characterized by further comprising a first groove and/or a second groove, wherein the first groove is arranged at a part of the first protrusion, which is used for being in contact with one of the static contacts, or the first groove is arranged at a part of one of the static contacts, which is used for being in contact with the first protrusion, and the first groove is long and is arranged along the width direction of the movable contact; the second groove is arranged at a position where the second protrusion is used for contacting with the other fixed contact, or the second groove is arranged at a position where the other fixed contact is used for contacting with the second protrusion, and the second groove is long-strip-shaped and is arranged along the length direction of the movable contact.

Furthermore, the moving contact passes through stamping forming first convex part and second convex part, perhaps, the one end riveting of moving contact has first rivet, and the head of this first rivet constitutes first convex part, the other end riveting of moving contact has the second rivet, and the head of this second rivet constitutes the second convex part.

Furthermore, round chamfers are arranged on the peripheral edges of the planes.

The utility model also provides a high voltage direct current relay, including promoting the lever part, coil and moving the iron core, promote the bottom of the lever part and fix with moving the iron core mutually, move the iron core and cooperate in the through-hole of coil; still include as above-mentioned the utility model discloses a contact structure, catch bar part top with the moving contact activity is connected.

Furthermore, the push rod part comprises a U-shaped support, a spring seat, a fixing sheet, a contact spring and a push rod; the upper parts of the fixed plate, the push rod and the spring seat are fixed together in an injection molding mode, the U-shaped support is inverted, and the bottom of the U-shaped support is connected with the fixed plate; the moving contact is arranged between the top wall of the U-shaped support and the spring seat through a contact spring, and the lower part of the push rod is connected with the moving iron core.

Furthermore, the device also comprises at least one upper yoke iron and at least one lower armature iron, wherein the upper yoke iron is fixed on the lower end surface of the top wall of the U-shaped bracket, and the lower armature iron is fixed on the movable contact.

Furthermore, the lower armature is U-shaped and is sleeved or inserted in the middle of the moving contact, and two ends of the lower armature face upwards; the number of the upper yoke iron and the number of the lower armature iron are respectively one, or the number of the upper yoke iron and the number of the lower armature iron are respectively at least two, and the upper yoke iron and the lower armature iron are in one-to-one up-and-down correspondence.

The permanent magnet structure further comprises two permanent magnets, the two permanent magnets are respectively erected on two sides of the moving contact in the length direction, and the magnetic pole direction of each permanent magnet is respectively located in the length direction of the moving contact.

The device further comprises a ceramic cover, the two fixed contacts are respectively arranged at the top of the ceramic cover in a penetrating manner, and the moving contact is positioned in the ceramic cover; the two permanent magnets are respectively positioned at the outer sides of the ceramic cover; the two permanent magnets are respectively positioned between the U-shaped yoke iron clamps on the corresponding sides and the ceramic cover.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. because two static contacts are line contact with the moving contact respectively at the contact state, make the utility model discloses reduce the contact resistance of static contact and moving contact and the electronic repulsion between the contact, promoted the contact reliability of contact. In addition, because the direction of the line contact between one static contact and the moving contact is consistent with the length direction of the moving contact, and the direction of the line contact between the other static contact and the moving contact is consistent with the width direction of the moving contact, the contact coverage area of the two static contacts and the moving contact forms a triangular area, so that the two static contacts and the moving contact are more stably contacted, and the moving contact is more unlikely to deflect.

2. The setting of first convex part, second convex part makes the structure of two static contacts need not the change, and only need improve the structure at moving contact both ends can, thereby make the utility model discloses a moving contact, static contact change in machine-shaping.

3. First cambered surface, the second cambered surface, the third cambered surface, the plane, the setting of round chamfer, make static contact and moving contact can realize line contact with simple structure on the one hand, on the other hand cambered surface (first cambered surface or third cambered surface promptly) sets up on the blow-out direction, when the contact separation is drawn the arc, under the effect of magnetic blow-out field, electric arc can be along first cambered surface, the third cambered surface moves outward fast, and along with the quick grow in contact clearance, do benefit to the arc root and move outward, thereby electric arc has been reduced and has been lasted the time of ablating in the contact position, the wearing and tearing of contact have been reduced, the life-span of relay has been promoted.

4. The arrangement of the first groove and/or the second groove enables the moving contact and the fixed contact to realize multi-point contact, and under the same contact pressure, because the parallel contact resistance is smaller than that of a single contact point, the total contact resistance between the relay contacts can be reduced through the multi-point contact, so that the heat productivity of the relay is smaller, and the reliability is higher. In addition, the moving contact and the static contact are in multipoint contact, current shunting can be further achieved, and electric repulsion is reduced through electric repulsion of multiple points according to the principle of the electric repulsion, so that the short-circuit resistance of a product is improved, and the reliability of the relay is improved.

The present invention will be described in further detail with reference to the accompanying drawings and examples; however, the utility model discloses a promote contact stability's contact structure and high voltage direct current relay is not limited to the embodiment.

Drawings

FIG. 1 is an exploded view of the first embodiment of the present invention;

fig. 2 is a schematic perspective view of a moving contact according to an embodiment of the present invention;

fig. 3 is a front view of the first embodiment of the present invention showing two stationary contacts and a movable contact in a contact state;

fig. 4 is a left side view of the two fixed contacts and the movable contact in a contact state according to the first embodiment of the present invention;

fig. 5 is a right side view of the first embodiment of the present invention showing the stationary contact and the movable contact in a contact state;

FIG. 6 is a schematic perspective view of the first embodiment of the present invention;

fig. 7 is a top view of the first embodiment of the present invention;

FIG. 8 is a cross-sectional view E-E of FIG. 7 according to an embodiment;

FIG. 9 is a schematic view of an embodiment of the present invention showing an arc blow in a state of a yoke clip having a U-shape;

FIG. 10 is a schematic view of the first embodiment of the present invention in an arc blow state without a U-shaped yoke clip;

fig. 11 is a schematic perspective view of a moving contact according to a second embodiment of the present invention;

fig. 12 is a schematic view of a triangular contact area between two fixed contacts and a movable contact according to the second embodiment of the present invention;

fig. 13 is a schematic perspective view of a moving contact and a push rod member of the third embodiment of the present invention in a combined state;

FIG. 14 is an exploded view of FIG. 13 according to the third embodiment;

fig. 15 is a schematic perspective view of a moving contact and a push rod member of the fourth embodiment of the present invention in a combined state;

FIG. 16 is an exploded view of the fourth embodiment of FIG. 15;

fig. 17 is a schematic perspective view of a moving contact according to the fifth embodiment of the present invention;

fig. 18 is a front view of the two fixed contacts and the movable contact in a contact state according to the fifth embodiment of the present invention;

fig. 19 is a left side view of the two stationary contacts and the moving contact in a contact state according to the fifth embodiment of the present invention;

fig. 20 is a right side view of two fixed contacts and a movable contact in a contact state according to the fifth embodiment of the present invention;

fig. 21 is an exploded schematic view of a moving contact according to the sixth embodiment of the present invention;

fig. 22 is a front view of the two fixed contacts and the movable contact in a contact state according to the sixth embodiment of the present invention;

fig. 23 is a left side view of two fixed contacts and a movable contact in a contact state according to the sixth embodiment of the present invention;

fig. 24 is a right side view of two fixed contacts and a movable contact in a contact state according to the sixth embodiment of the present invention;

fig. 25 is an exploded view of a movable contact according to the seventh embodiment of the present invention;

fig. 26 is a front view of the seventh embodiment of the present invention showing two fixed contacts and a movable contact in a contact state;

fig. 27 is a left side view of the two fixed contacts and the movable contact in a contact state according to the seventh embodiment of the present invention;

fig. 28 is a right side view of the two fixed contacts and the movable contact in a contact state according to the seventh embodiment of the present invention;

fig. 29 is an exploded schematic view of a movable contact according to the eighth embodiment of the present invention;

fig. 30 is a front view illustrating the eight embodiment of the present invention, in a state where two fixed contacts and two movable contacts are in contact with each other;

fig. 31 is a left side view of the two fixed contacts and the movable contact in a contact state according to the eighth embodiment of the present invention;

fig. 32 is a right side view of the two fixed contacts and the movable contact in a contact state according to the eighth embodiment of the present invention;

fig. 33 is a schematic perspective view of a three-dimensional structure of two stationary contacts and a movable contact before contacting in accordance with the ninth embodiment of the present invention;

fig. 34 is a schematic perspective view of two stationary contacts according to the ninth embodiment of the present invention;

fig. 35 is a front view of the nine-embodiment of the present invention showing two stationary contacts and a movable contact in a contact state;

fig. 36 is a left side view of two stationary contacts and a movable contact in a contact state according to the eighth embodiment of the present invention;

fig. 37 is a right side view of the two stationary contacts and the movable contact in a contact state according to the eighth embodiment of the present invention.

Detailed Description

The terms "first," "second," "third," and the like in the description of the invention are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order, nor should they be construed to indicate or imply relative importance. In the description, the directions or positional relationships indicated by "up", "down", "left", "right", etc. are based on the directions or positional relationships shown in the drawings, and are only for convenience of description of the present invention, and do not indicate or imply that the device indicated must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the scope of the present invention. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as the case may be. In addition, in the description of the present application, "at least one" means one or more than one unless otherwise specified. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone.

Example one

Please refer to fig. 1-10, the contact structure for improving contact stability of the present invention includes two static contacts 1 and a moving contact 6, two ends of the moving contact 6 respectively correspond to the two static contacts 1, specifically, the two static contacts 1 are disposed side by side along the length direction of the moving contact 6, the moving contact 6 is located below the static contact 1, and two ends of the moving contact 6 are respectively matched with the bottom ends of the static contacts 1. The utility model discloses a contact structure can be applied to high voltage direct current relay, but is not limited to this, works as the utility model discloses a contact structure is applied to when high voltage direct current relay, high voltage direct current relay except including static contact 1 and moving contact 6 still include promotion rod part, coil 14 and move iron core 13, promote rod part top with the 6 activities of moving contact are connected, the bottom of promotion rod part with it is fixed mutually to move iron core 13, move the cooperation of iron core 13 in coil 14's through-hole. The two fixed contacts 1 and the movable contact 6 are in line contact in a contact state, and a line contact direction of one of the fixed contacts and one end of the movable contact 6 is consistent with a length direction of the movable contact 6, and a line contact direction of the other fixed contact and the other end of the movable contact 6 is consistent with a width direction of the movable contact, specifically, in a view angle of fig. 3, a line contact direction of the fixed contact and the movable contact 6 on the left side is consistent with the length direction of the movable contact 6, and a line contact direction of the fixed contact and the movable contact 6 on the right side is consistent with the width direction of the movable contact, but not limited thereto. In the three-dimensional coordinate system shown in fig. 2, the length direction of the movable contact is consistent with the Y-axis direction, and the width direction of the movable contact is consistent with the X-axis direction.

In this embodiment, an upward convex first protrusion 61 is disposed at one end of the movable contact 6, and one end of the movable contact 6 is in line contact with one of the fixed contacts through the first protrusion 61; the other end of the movable contact 6 is provided with a second convex part 62 protruding upwards, and the other end of the movable contact 6 is in line contact fit with the other stationary contact through the second convex part 62. The moving contact 6 is in a long plate shape and is formed by stamping a plate material, and the moving contact 6 is formed by stamping the first convex part 61 and the second convex part 62.

In this embodiment, an upper surface of the first convex portion 61 for line contact and matching with the one of the fixed contacts is an upward convex first arc surface 611, and two ends of the first arc surface 611 are located in the width direction of the movable contact 6; the upper surface of the second convex part 62 for being in line contact with the other fixed contact is an upward convex second arc surface 621, and two ends of the second arc surface 621 are located in the length direction of the movable contact 6; the two ends of the second protrusion 62 in the width direction of the movable contact 6 are respectively provided with a third arc 622 that is convex and supports the second arc 621, and the third arc 622 is used to guide the arc generated by the disjunction of the another fixed contact and the movable contact 6 to move along the width of the movable contact 6 in the direction away from the second protrusion 62. The bottom end of the static contact 1 is in contact with the first protrusion 61 or the second protrusion 62, and the periphery of the plane is provided with a round chamfer 11.

In this embodiment, at least one first groove 612 is disposed at a portion of the first protrusion 61, where the first protrusion is used for contacting the stationary contact 6, and the first groove 612 is long and is disposed along the width direction of the movable contact 6. At least one second groove 623 is arranged at a part of the second protrusion 62, which is used for contacting with the static contact 1, and the second groove 623 is long and is arranged along the length direction of the movable contact. Specifically, the number of the first groove 612 and the second groove 623 is one, but not limited thereto.

The utility model discloses a high-voltage direct-current relay, including static contact 1, moving contact 6, push rod part, coil 14 and movable iron core 13, the push rod part includes U type support 4, spring holder 8, stationary blade 82, contact spring 8 and push rod 81; the fixing piece 82, the upper part of the push rod 81 and the spring seat 8 are fixed together in an injection molding mode, the U-shaped support 4 is inverted, and the bottom of the U-shaped support is connected with the fixing piece 82; the middle part of the moving contact 6 is arranged between the top wall of the U-shaped support 4 and the spring seat 8 through a contact spring 7, and the lower part of the push rod 81 is connected with the moving iron core 13.

In this embodiment, the coil 14 is located in a U-shaped yoke 16, a magnetic conducting tube 15 extending into the coil 14 is disposed in the middle of the bottom of the U-shaped yoke 16, and the movable iron core 13 is movably sleeved in the magnetic conducting tube 15. The upper end of the U-shaped yoke 16 is connected with a yoke plate 10, the upper end of the yoke plate 10 is provided with a frame piece 9, the yoke plate 10 is connected with the frame piece 9 by soldering, and the middle part of the yoke plate 10 is sleeved with a static iron core 11. The bottom of the push rod 8 sequentially penetrates through the frame piece 9, the static iron core 11 and a reaction spring 12 from top to bottom and is fixedly connected with the movable iron core 13, and the reaction spring 12 is propped between the static iron core 11 and the movable iron core 13.

In this embodiment, the utility model discloses still include two permanent magnets 5, these two permanent magnets 5 stand respectively the moving contact 6 is in length direction 'S both sides, and every permanent magnet 5' S magnetic pole direction is located respectively the length direction of moving contact 6, the N utmost point and the S utmost point of every permanent magnet 5 are followed promptly the length direction of moving contact 6 distributes. The utility model also comprises a ceramic cover 2 positioned above the frame piece 9, the frame piece 9 is connected with the ceramic cover 2 by brazing, the two static contacts 1 are respectively arranged at the top of the ceramic cover 2 in a penetrating way, and the moving contact 6 is positioned in the ceramic cover 2; the two permanent magnets 5 are respectively positioned on the outer sides of the ceramic cover 2. The utility model discloses still include two U font yoke iron clamps 3, these two U font yoke iron clamps 3 are followed the length direction of moving contact 6 sets up relatively, and encloses the 2 outsides of ceramic cover, two permanent magnets 5 are located respectively and correspond between the U font yoke iron clamp 3 and the ceramic cover 2 of side.

The utility model discloses a promote contact structure and high-voltage direct-current relay of contact stability, its two static contacts 1 and moving contact 6 change into line contact by current point contact, have reduced the contact resistance of static contact and moving contact and the electronic repulsion between the contact, have promoted the contact reliability of contact. In addition, since the line contact direction of one of the fixed contacts with the movable contact 6 is consistent with the length direction of the movable contact 6, and the line contact direction of the other fixed contact with the movable contact 6 is consistent with the width direction of the movable contact, a triangular region 63 (shown in fig. 12 of the following second embodiment) is formed in the contact coverage area of the two fixed contacts 1 and the movable contact 6, so that the contact between the two fixed contacts 1 and the movable contact 6 is more stable, and the movable contact 6 is less prone to deflection.

The utility model discloses when the contact separation is drawn the arc, under the effect in magnetic blow magnetic field, the disconnected electric arc 17 that produces of one of them static contact and moving contact 6 can be along the first cambered surface 611 of first convex part 61 and the round chamfer 11 of static contact 1 move outward fast, as shown in fig. 4, the disconnected electric arc 17 that produces of another static contact and moving contact 6 can along the third cambered surface 622 of second convex part 62 and the round chamfer 11 of static contact 1 move outward fast, as shown in fig. 5, and along with the quick grow in contact clearance, do benefit to the electric arc root and move outward to reduce the time that electric arc lasts the ablation in the contact position, reduced the wearing and tearing of contact, promoted the life-span of relay. Under the action of the magnetic fields of the two permanent magnets 5, the arcs 17 generated by the disjunction of the two static contacts 1 and the movable contact 6 are respectively and rapidly pulled away towards the corresponding directions, specifically: when the two permanent magnets 5 have the same polarity and are opposite to each other, the electric arc 17 blows an arc to the same side of the moving contact 6 in the width direction (the direction of the electric arc generated by the disjunction of the two fixed contacts and the moving contact is divided into upper left-upper right or lower left-lower right in the view angles of fig. 9 and 10); when the two permanent magnets 5 have the same polarity and are not opposite to each other, the electric arc 17 blows arcs to different sides (the directions of the electric arcs generated by breaking the two fixed contacts and the movable contacts are respectively from top left to bottom right or from bottom left to top right in the views of fig. 9 and 10). In fig. 9, fig. 10, the arrow indicates the magnetic field direction of blowing, and the dotted line indicates the magnetic field direction, the utility model discloses arc extinguishing space on moving contact width direction is bigger than the arc extinguishing space on moving contact length direction.

The arrangement of the first groove 612 and the second groove 623 enables the moving contact 6 to realize multi-point contact with the static contact 1, and under the same contact pressure, because the parallel contact resistance is smaller than that of a single contact point, the total contact resistance between the relay contacts can be reduced by the multi-point contact, so that the heat productivity of the relay is smaller, and the reliability is higher. In addition, the moving contact 6 and the static contact 1 are in multipoint contact, current shunting can be further realized, according to the principle of electric repulsion, the electric repulsion of multiple points enables the electric repulsion to be reduced (the electric repulsion is in direct proportion to the square of the current, and the sum of the shunted electric repulsion is smaller than the electric repulsion before shunting), so that the short-circuit resistance of the product is improved, and the reliability of the relay is improved.

Example two

Referring to fig. 11 and 12, a contact structure for improving contact stability and a high voltage direct current relay according to the present invention are different from the first embodiment in that: the first recess 612 is not provided in the first projection 61, and the second recess 623 is not provided in the second projection 62.

The utility model discloses a high-voltage direct current relay, because the direction of one of them static contact and the line contact of moving contact 6 with the length direction of moving contact 6 is unanimous, the direction of another static contact and the line contact of moving contact 6 with the width direction of moving contact is unanimous for the contact coverage area of two static contacts 1 and moving contact 6 forms triangle-shaped region 63, thereby makes two static contacts 1 more stable with the contact of moving contact 6, and moving contact 6 can not the beat more.

EXAMPLE III

Referring to fig. 13 and 14, a contact structure for improving contact stability and a high voltage direct current relay according to the present invention are different from the first embodiment in that: the utility model discloses still include at least one upper yoke 18 and at least one lower armature 19, upper yoke 18 adopts the riveted mode to fix the lower terminal surface of the roof of U type support 4, lower armature 19 is fixed in moving contact 6. The lower armature 19 is U-shaped and is sleeved or inserted in the middle 62 of the moving contact, and two ends of the lower armature 19 face upward. The number of the upper yoke 18 and the lower armature 19 is two, respectively, but not limited thereto. The upper yoke iron 18 and the lower armature iron 19 correspond up and down one by one. The two upper yokes 18 are distributed along the width direction of the top wall of the U-shaped support 4, one side of each of the two lower armatures 19, which is far away from each other, is respectively located on both sides of the middle portion 62 of the movable contact in the width direction, and one side of each of the two lower armatures 19, which is adjacent to each other, is respectively inserted into a yielding through hole 621 formed in the middle portion 62 of the movable contact. In other embodiments, the number of the upper yoke and the number of the lower armature are respectively one, and two sides of the lower armature are respectively located at two sides of the middle part of the movable contact in the width direction. When the moving contact flows large short-circuit current, the moving contact is propped upwards through the magnetic attraction of the upper yoke iron to the lower armature iron so as to resist the electric repulsion force caused by the short-circuit current. In this embodiment, the number of the upper yoke 18 and the lower armature 19 is two, so that magnetic pole surfaces (at least four magnetic pole surfaces in total) can be increased, magnetic efficiency is improved, and attraction force is increased.

Example four

Referring to fig. 15 and fig. 16, the difference between the contact structure for improving contact stability and the high voltage dc relay of the present invention and the second embodiment of the present invention is: the utility model discloses still include at least one upper yoke 18 and at least one lower armature 19, upper yoke 18 adopts the riveted mode to fix the lower terminal surface of the roof of U type support 4, lower armature 19 is fixed in moving contact 6. The lower armature 19 is U-shaped and is sleeved or inserted in the middle 62 of the moving contact, and two ends of the lower armature 19 face upward. The number of the upper yoke 18 and the lower armature 19 is at least two, specifically two, respectively, but not limited thereto. The upper yoke iron 18 and the lower armature iron 19 correspond up and down one by one. The two upper yokes 18 are distributed along the width direction of the top wall of the U-shaped support 4, one side of each of the two lower armatures 19, which is far away from each other, is located on each of the two sides of the middle portion 62 of the movable contact in the width direction, and the adjacent sides of the two lower armatures 19 are respectively inserted into the abdicating through holes 621 formed in the middle portion 62 of the movable contact. In other embodiments, the number of the upper yoke and the lower armature is one, and two sides of the lower armature are respectively located on two sides of the middle of the movable contact in the width direction. When the moving contact flows large short-circuit current, the moving contact is propped upwards through the magnetic attraction of the upper yoke iron to the lower armature iron so as to resist the electric repulsion force caused by the short-circuit current. In this embodiment, the number of the upper yoke 18 and the lower armature 19 is two, which can increase magnetic pole surfaces (at least four magnetic pole surfaces in total), improve magnetic efficiency, and increase attraction force.

EXAMPLE five

Referring to fig. 17 to 20, the difference between the contact structure for improving contact stability and the high voltage dc relay of the present invention and the above embodiments is: one end of the movable contact 6 is riveted with a first rivet 20, a head of the first rivet 20 forms the first convex part, the other end of the movable contact 6 is riveted with a second rivet 21, and a head of the second rivet 21 forms the second convex part.

In this embodiment, an upper surface of the head of the first rivet 20 (i.e., the first convex portion) for being in line contact with one of the fixed contacts is a convex first arc surface 201, and two ends of the first arc surface 201 are located in the width direction of the movable contact 6; the upper surface of the head of the second rivet 21 (i.e. the second convex part) for being in line contact with the other fixed contact is a convex second arc surface 211, and both ends of the second arc surface 211 are located in the length direction of the movable contact 6; two ends of the head of the second rivet 21 (i.e., the second protrusion) in the width direction of the movable contact 6 are respectively provided with a third arc surface 212 that is convex and supports the second arc surface 211, and the third arc surface 212 is used for guiding the arc generated by the disjunction of the another fixed contact and the movable contact 6 to move in the direction away from the second protrusion (i.e., the head of the second rivet 21) along the width of the movable contact 6. The bottom end face of the static contact 1 is also a plane, and round chamfers 11 are arranged on the edges of the periphery of the bottom end face of the static contact 1.

The utility model discloses a promote contact structure and high voltage direct current relay of contact stability, when the contact separation was drawn the arc, under the effect in magnetic blow-out field, one of them static contact and the disconnected electric arc 17 that produces of moving contact 6 can be along the first cambered surface 201 of the head of first rivet 20 (promptly first convex part) and the round chamfer 11 of static contact 1 move outward fast, as shown in fig. 20, another static contact and the disconnected electric arc 17 that produces of moving contact 6 can be along the third cambered surface 212 of the head of second rivet 21 (promptly the second convex part) and the round chamfer 11 of static contact 1 move outward fast, as shown in fig. 19, and along with the quick grow in contact clearance, do benefit to the electric arc root and move outward to reduce the electric arc and lasted the time of ablating in the contact position, reduced the wearing and tearing of contact, promoted the life-span of relay. Under the action of the magnetic fields of the two permanent magnets 5, the electric arcs 17 generated by the disjunction of the two static contacts 1 and the movable contact 6 are respectively and rapidly pulled away towards the corresponding directions, specifically: when the two permanent magnets 5 are opposite in polarity, the electric arc 17 blows an arc to the same side of the moving contact 6 in the width direction; when the two permanent magnets 5 are of the same polarity and are not opposite, the electric arc 17 blows to different sides of the moving contact 6 in the width direction.

EXAMPLE six

Referring to fig. 21 to fig. 23, the difference between the contact structure for improving contact stability and the high voltage direct current relay of the present invention and the fifth embodiment of the present invention is: at least one first groove 202 is formed in a portion of the head of the first rivet 20, which is in line contact with the fixed contact 6, and the first groove 202 is shaped like a long strip and is arranged along the width direction of the movable contact 6. At least one second groove 213 is formed in a portion of the head of the second rivet 21, which is in line contact with the static contact 1, and the second groove 213 is shaped like a long strip and is arranged along the length direction of the dynamic contact 6. Specifically, the number of the first groove 202 and the second groove 213 is one, but not limited thereto.

The arrangement of the first groove 202 and the second groove 213 enables the movable contact 6 to realize multi-point contact with the static contact 1, and under the same contact pressure, because the parallel contact resistance is smaller than that of a single contact point, the total contact resistance between the relay contacts can be reduced by the multi-point contact, so that the heat productivity of the relay is smaller, and the reliability is higher. In addition, the moving contact 6 and the static contact 1 are in multipoint contact, current shunting can be further realized, according to the principle of the electric repulsion force, the electric repulsion force at multiple points enables the electric repulsion force to be reduced (the electric repulsion force is in direct proportion to the square of the current, and the sum of the shunted electric repulsion force is smaller than that before shunting), so that the short circuit resistance of the product is improved, and the reliability of the relay is improved.

When the contacts are separated and arcing is performed, under the action of a magnetic blowing magnetic field, the arc 17 generated by the disjunction of one of the fixed contact and the movable contact 6 moves outwards quickly along the first arc 201 of the head of the first rivet 20 (i.e., the first convex part) and the round chamfer 11 of the fixed contact 1, as shown in fig. 24, the arc 17 generated by the disjunction of the other fixed contact and the movable contact 6 moves outwards quickly along the third arc 212 of the head of the second rivet 21 (i.e., the second convex part) and the round chamfer 11 of the fixed contact 1, as shown in fig. 23, and as the contact gap is increased quickly, the arc root moves outwards, so that the continuous ablation time of the arc at the contact position is reduced, the abrasion of the contacts is reduced, and the service life of the relay is prolonged. Under the action of the magnetic fields of the two permanent magnets 5, the electric arcs 17 generated by the disjunction of the two static contacts 1 and the movable contact 6 are respectively and rapidly pulled away towards the corresponding directions, specifically: when the two permanent magnets 5 have the same polarity and are opposite, the electric arc 17 blows an arc to the same side of the moving contact 6 in the width direction; when the two permanent magnets 5 are of the same polarity and are not opposite, the electric arc 17 blows to different sides of the moving contact 6 in the width direction.

EXAMPLE seven

Referring to fig. 25 to fig. 28, a contact structure for improving contact stability and a high-voltage direct-current relay according to the present invention are different from the fifth embodiment in that: at least one second groove 213 is formed in a portion of the head of the second rivet 21, which is in line contact with the other fixed contact, and the second groove 213 is shaped like a long strip and is arranged along the length direction of the movable contact 6. The second groove 213 is arranged to enable the other end of the moving contact 6 to realize multi-point contact with the static contact 1, and under the same contact pressure, because the parallel contact resistance is smaller than that of a single contact point, the multi-point contact can reduce the total contact resistance between the relay contacts, so that the heat productivity of the relay is smaller, and the reliability is higher. In addition, the moving contact 6 and the static contact 1 are in multipoint contact, current shunting can be further realized, according to the principle of electric repulsion, the electric repulsion of multiple points enables the electric repulsion to be reduced (the electric repulsion is in direct proportion to the square of the current, and the sum of the shunted electric repulsion is smaller than the electric repulsion before shunting), so that the short-circuit resistance of the product is improved, and the reliability of the relay is improved.

When the contacts are separated and arcing is performed, under the action of a magnetic blowing magnetic field, the arc 17 generated by the disjunction of one of the fixed contact and the movable contact 6 moves outwards quickly along the first arc 201 of the head of the first rivet 20 (i.e., the first convex part) and the round chamfer 11 of the fixed contact 1, as shown in fig. 27, the arc 17 generated by the disjunction of the other fixed contact and the movable contact 6 moves outwards quickly along the third arc 212 of the head of the second rivet 21 (i.e., the second convex part) and the round chamfer 11 of the fixed contact 1, as shown in fig. 28, and as the contact gap is increased quickly, the arc root moves outwards, so that the continuous ablation time of the arc at the contact position is reduced, the abrasion of the contacts is reduced, and the service life of the relay is prolonged. Under the action of the magnetic fields of the two permanent magnets 5, the arcs 17 generated by the disjunction of the two static contacts 1 and the movable contact 6 are respectively and rapidly pulled away towards the corresponding directions, specifically: when the two permanent magnets 5 have the same polarity and are opposite, the electric arc 17 blows an arc to the same side of the moving contact 6 in the width direction; when the two permanent magnets 5 are of the same polarity and are not opposite, the electric arc 17 blows to different sides of the moving contact 6 in the width direction.

Example eight

Referring to fig. 29-32, a contact structure for improving contact stability and a high-voltage dc relay according to the present invention are different from the fifth embodiment in that: at least one first groove 202 is formed in a portion where the head of the first rivet 20 is in line contact with one of the fixed contacts, and the first groove 202 is long and is arranged along the width direction of the movable contact 6. The arrangement of the first groove 202 enables one end of the movable contact 6 to realize multi-point contact with the static contact 1, and under the same contact pressure, because the parallel contact resistance is smaller than that of a single contact point, the total contact resistance between the relay contacts can be reduced through the multi-point contact, so that the heat productivity of the relay is smaller, and the reliability is higher. In addition, the moving contact 6 and the static contact 1 are in multipoint contact, current shunting can be further realized, according to the principle of electric repulsion, the electric repulsion of multiple points enables the electric repulsion to be reduced (the electric repulsion is in direct proportion to the square of the current, and the sum of the shunted electric repulsion is smaller than the electric repulsion before shunting), so that the short-circuit resistance of the product is improved, and the reliability of the relay is improved.

When the contacts are separated and arcing is performed, under the action of a magnetic blowing magnetic field, the arc 17 generated by breaking one of the fixed contact and the movable contact 6 can move outwards quickly along the first arc 201 of the head of the first rivet 20 (i.e., the first convex part) and the round chamfer 11 of the fixed contact 1, as shown in fig. 32, the arc 17 generated by breaking the other of the fixed contact and the movable contact 6 can move outwards quickly along the third arc 212 of the head of the second rivet 21 (i.e., the second convex part) and the round chamfer 11 of the fixed contact 1, as shown in fig. 31, and as the contact gap is increased quickly, the arc root can move outwards, so that the continuous ablation time of the arc at the contact position is reduced, the wear of the contacts is reduced, and the service life of the relay is prolonged. Under the action of the magnetic fields of the two permanent magnets 5, the electric arcs 17 generated by the disjunction of the two static contacts 1 and the movable contact 6 are respectively and rapidly pulled away towards the corresponding directions, specifically: when the two permanent magnets 5 are opposite in polarity, the electric arc 17 blows an arc to the same side of the moving contact 6 in the width direction; when the two permanent magnets 5 are of the same polarity and are not opposite, the electric arc 17 blows to different sides of the moving contact 6 in the width direction.

Example nine

Referring to fig. 33-37, the contact structure for improving contact stability and the high voltage dc relay of the present invention are different from the above embodiments in that: at least one first groove 12 is formed in a portion of one of the static contacts 1, which is used for being in contact with the first protrusion 61, and the first groove 12 is long and is arranged along the width direction of the movable contact 6. At least one second groove 13 is formed in a portion of the other static contact 1, which is used for being contacted by the second protrusion 62, and the second groove 13 is long-strip-shaped and is arranged along the length direction of the movable contact 6. Specifically, the number of the first groove 12 and the second groove 13 is one, but not limited thereto.

The arrangement of the first groove 12 and the second groove 13 enables the movable contact 6 to realize multi-point contact with the static contact 1, and under the same contact pressure, because the parallel contact resistance is smaller than that of a single contact point, the total contact resistance between the relay contacts can be reduced through the multi-point contact, so that the heat productivity of the relay is smaller, and the reliability is higher. In addition, the moving contact 6 and the static contact 1 are in multipoint contact, current shunting can be further realized, according to the principle of electric repulsion, the electric repulsion of multiple points enables the electric repulsion to be reduced (the electric repulsion is in direct proportion to the square of the current, and the sum of the shunted electric repulsion is smaller than the electric repulsion before shunting), so that the short-circuit resistance of the product is improved, and the reliability of the relay is improved.

When the contacts are separated and arc-drawn, under the action of a magnetic blow-out magnetic field, the arc 17 generated by breaking one of the fixed contact and the movable contact 6 can move outwards quickly along the first arc 611 of the first convex part and the round chamfer 11 of the fixed contact 1, as shown in fig. 36, the arc 17 generated by breaking the other fixed contact and the movable contact 6 can move outwards quickly along the third arc 622 of the second convex part and the round chamfer 11 of the fixed contact 1, as shown in fig. 37, and as the contact gap becomes larger quickly, the arc root can move outwards, so that the continuous ablation time of the arc at the contact position is reduced, the abrasion of the contact is reduced, and the service life of the relay is prolonged. Under the action of the magnetic fields of the two permanent magnets 5, the electric arcs 17 generated by the disjunction of the two static contacts 1 and the movable contact 6 are respectively and rapidly pulled away towards the corresponding directions, specifically: when the two permanent magnets 5 have the same polarity and are opposite, the electric arc 17 blows an arc to the same side of the moving contact 6 in the width direction; when the two permanent magnets 5 are of the same polarity and are not opposite, the electric arc 17 blows to different sides of the moving contact 6 in the width direction. The utility model discloses a promote high voltage direct current relay of contact stability, it is the same with prior art or can adopt prior art to realize not to relate to the part.

The above-mentioned embodiment only is used for further explaining the utility model discloses a promote contact structure and high-voltage direct current relay of contact stability, nevertheless the utility model discloses not confine the embodiment to, all be according to the utility model discloses a technical entity all falls into to any simple modification, the equivalent change and the modification of doing above embodiment the utility model discloses technical scheme's within the scope of protection.

Claims (12)

1. A contact structure for improving contact stability comprises two fixed contacts and a movable contact, wherein two ends of the movable contact respectively correspond to the two fixed contacts; the method is characterized in that: the two static contacts are in line contact with the moving contact respectively in a contact state, the direction of the line contact of one of the static contacts with one end of the moving contact is consistent with the length direction of the moving contact, and the direction of the line contact of the other static contact with the other end of the moving contact is consistent with the width direction of the moving contact.

2. The contact structure for improving contact stability according to claim 1, wherein: one end of the moving contact is provided with a first convex part protruding upwards, and one end of the moving contact is in line contact fit with one of the static contacts through the first convex part; and the other end of the moving contact is provided with a second convex part protruding upwards, and the other end of the moving contact is in line contact fit with the other static contact through the second convex part.

3. The contact structure for improving contact stability according to claim 2, wherein: the upper surface of the first convex part, which is in line contact fit with one of the static contacts, is an upward convex first cambered surface, and two ends of the first cambered surface are positioned in the width direction of the movable contact; the upper surface of the second convex part, which is in line contact fit with the other fixed contact, is a convex second cambered surface, and two ends of the second cambered surface are positioned in the length direction of the moving contact; the two ends of the second convex part in the width direction of the moving contact are respectively provided with a third cambered surface which is used for bearing the second cambered surface and protrudes outwards, and the third cambered surface is used for guiding the arc generated by the disjunction of the other fixed contact and the moving contact to move along the width of the moving contact in the direction far away from the second convex part; the surface of the static contact, which is used for being in contact with the first convex part or the second convex part, is a plane.

4. The contact structure for improving contact stability according to claim 2, wherein: the movable contact is characterized by further comprising a first groove and/or a second groove, wherein the first groove is formed in a part, used for being in contact with one of the fixed contacts, of the first protruding portion, or the first groove is formed in a part, used for being in contact with the first protruding portion, of one of the fixed contacts, and the first groove is long and is arranged along the width direction of the movable contact; the second groove is arranged at a position where the second protrusion is used for contacting with the other fixed contact, or the second groove is arranged at a position where the other fixed contact is used for contacting with the second protrusion, and the second groove is long-strip-shaped and is arranged along the length direction of the movable contact.

5. Contact structure for improving contact stability according to claim 2 or 3 or 4, characterized in that: the moving contact passes through stamping forming first convex part and second convex part, perhaps, the one end riveting of moving contact has first rivet, and the head of this first rivet constitutes first convex part, the other end riveting of moving contact has the second rivet, and the head of this second rivet constitutes the second convex part.

6. The contact structure for improving contact stability according to claim 3, wherein: and round chamfers are arranged on the peripheral edges of the planes.

7. A high-voltage direct-current relay comprises a pushing rod component, a coil and a movable iron core, wherein the bottom of the pushing rod component is fixed with the movable iron core, and the movable iron core is matched in a through hole of the coil; the method is characterized in that: the contact structure for improving the contact stability is further comprised in any one of claims 1 to 6, wherein the top of the push rod component is movably connected with the movable contact.

8. The high-voltage direct current relay of claim 7, characterized in that: the push rod part comprises a U-shaped bracket, a spring seat, a fixing plate, a contact spring and a push rod; the fixing piece, the upper part of the push rod and the spring seat are fixed together in an injection molding mode, the U-shaped support is inverted, and the bottom of the U-shaped support is connected with the fixing piece; the moving contact is arranged between the top wall of the U-shaped support and the spring seat through a contact spring, and the lower part of the push rod is connected with the moving iron core.

9. The high voltage direct current relay of claim 8, characterized in that: the movable contact device also comprises at least one upper yoke iron and at least one lower armature iron, wherein the upper yoke iron is fixed on the lower end surface of the top wall of the U-shaped support, and the lower armature iron is fixed on the movable contact.

10. The high voltage direct current relay of claim 9, characterized in that: the lower armature is U-shaped and is sleeved or inserted in the middle of the moving contact, and two ends of the lower armature are upward; the number of the upper yoke iron and the number of the lower armature iron are respectively one, or the number of the upper yoke iron and the number of the lower armature iron are respectively at least two, and the upper yoke iron and the lower armature iron are in one-to-one up-and-down correspondence.

11. The high voltage direct current relay according to any one of claims 7-10, characterized in that: the permanent magnet device also comprises two permanent magnets, the two permanent magnets are respectively erected on two sides of the moving contact in the length direction, and the magnetic pole direction of each permanent magnet is respectively positioned in the length direction of the moving contact.

12. The high voltage direct current relay of claim 11, wherein: the two fixed contacts are respectively arranged on the tops of the ceramic covers in a penetrating way, and the moving contact is positioned in the ceramic covers; the two permanent magnets are respectively positioned on the outer sides of the ceramic covers; the two permanent magnets are respectively positioned between the U-shaped yoke iron clamps on the corresponding sides and the ceramic cover.

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