CN217847830U

CN217847830U - Anti short circuit structure and relay

Info

Publication number: CN217847830U
Application number: CN202221356799.4U
Authority: CN
Inventors: 范彬; 李凯; 陶阳; 陈建武; 马芮
Original assignee: Zhonghui Sensata Technology Wuhu Co ltd
Current assignee: Zhonghui Sensata Technology Wuhu Co ltd
Priority date: 2022-06-01
Filing date: 2022-06-01
Publication date: 2022-11-18
Anticipated expiration: 2032-06-01

Abstract

The utility model relates to an anti short circuit structure and relay, wherein anti short circuit structure includes main touch component, push rod subassembly, magnetic conduction subassembly and support frame, and main touch component includes a plurality of stationary contacts and movable contact spring, and the push rod subassembly includes mount, insulating cover and push rod, and mount, insulating cover and push rod connect and form the integral type structure; the magnetic conduction assembly comprises a first magnetic conduction block and at least one second magnetic conduction block, the first magnetic conduction block is connected with the fixing frame and fixes the movable reed, the main spring is connected between the insulating sleeve and the first magnetic conduction block, and the at least one second magnetic conduction block is arranged on the outer side of the fixing frame and connected with the supporting frame. The utility model discloses can realize being connected of monolithic second magnetic conduction piece or polylith second magnetic conduction piece and support frame, can increase the area of magnetic conduction through the volume and the quantity that increase magnetic conduction piece, make the magnetic attraction between first magnetic conduction piece and the second magnetic conduction piece obtain optimizing from this.

Description

Anti short circuit structure and relay

Technical Field

The utility model relates to a relay equipment technical field especially relates to anti short circuit structure and relay.

Background

A relay is an electric control device that generates a predetermined step change in a controlled amount in an electric output circuit when a change in an input amount meets a predetermined requirement. The relay has an interactive relation between a control system and a controlled system, is usually applied to an automatic control circuit, and actually is an 'automatic switch' for controlling the operation of a large current by using a small current, so that the relay plays roles of automatic adjustment, safety protection, circuit conversion and the like in the circuit.

At present, when high voltage direct current relay load end passes through electric current, electronic repulsion can appear in sound contact department, and when the unusual operating mode appearing, the electronic repulsion that load current produced can surpass the contact force, and the contact will be repelled, and the arcing will appear between the sound contact this moment. Along with the development of technology, battery performance is constantly promoted, and short-circuit current is bigger and bigger, leads to arcing more and more serious, and then can lead to the relay inefficacy. In order to avoid the situation that the contacts are repelled by the electric repulsion force, in the prior art, a magnetic conductive ring is usually added, so that an attractive force is formed in the direction of the contact pressure by generating a magnetic field, and then the contacts are repelled. But the volume of magnetic ring is great among the common relay for the manufacturing degree of difficulty to magnetic ring increases, and the suction of magnetic ring is not optimized simultaneously, and the condition that the suction can't resist electronic repulsion easily appears, and then appears again because of the condition that electronic repulsion causes the contact to repel to appear.

Disclosure of Invention

In view of the above-mentioned shortcomings of the prior art, it is an object of the present invention to provide an anti-short circuit structure and a relay to solve one or more problems in the prior art.

In order to achieve the above purpose, the technical scheme of the utility model is as follows:

the short-circuit resisting structure comprises a main contact assembly, a push rod assembly, a magnetic conduction assembly and a support frame, wherein the main contact assembly comprises a plurality of static contacts and a movable reed, the push rod assembly comprises a fixed frame, an insulating sleeve and a push rod, and the fixed frame, the insulating sleeve and the push rod are connected to form an integrated structure; the magnetic conduction assembly comprises a first magnetic conduction block and at least one second magnetic conduction block, the first magnetic conduction block is connected with the fixing frame and fixes the movable reed, the main spring is connected between the insulating sleeve and the first magnetic conduction block, and the at least one second magnetic conduction block is arranged on the outer side of the fixing frame and connected with the supporting frame.

Furthermore, the support frame includes the body of body and with the subframe body that body of body both sides are connected, every one end that the subframe body kept away from the body of body connects the extension, set up the locating hole on the extension.

Further, the main frame body and the extension part are parallel to each other.

Further, the main frame body is provided with at least one first hole.

Further, the main frame body is provided with at least one second hole.

Further, the second hole is formed along the width or length direction of the main frame body.

Furthermore, at least one gasket is arranged between the main frame body and the second magnetic conduction block.

Furthermore, along the width direction of the movable spring piece, second extending parts are respectively arranged on two sides of the main frame body.

Correspondingly, the utility model also provides an anti short circuit structure, ceramic body, soldering lug and yoke board, the inside formation of ceramic body can hold the space of anti short circuit structure, and is a plurality of stationary contact all is connected with the ceramic body, the ceramic body passes through the soldering lug and is connected yoke board, quiet iron core with the yoke board is connected, and the push rod runs through yoke board, quiet iron core and with move the iron core and be connected.

Furthermore, a counter force spring is arranged between the movable iron core and the static iron core on the outer side of the push rod.

Compared with the prior art, the utility model discloses a beneficial technological effect as follows:

(one) the utility model discloses a set up the support frame and can realize that polylith or monolithic second magnetic conduction piece rather than fixed, and then realize that first magnetic conduction piece constructs the magnetic conduction subassembly with second magnetic conduction piece, can increase the area of magnetic conduction through the quantity that increases magnetic conduction piece, make the magnetic attraction between first magnetic conduction piece and the second magnetic conduction piece obtain optimizing from this.

The movable spring piece is connected with the first magnetic conduction block through the first magnetic conduction block, and the movable spring piece is connected with the second magnetic conduction block through the second magnetic conduction block.

And (III) further, the fixing frame, the insulating sleeve and the push rod are integrally injection-molded, so that the push rod assembly can move as a whole, the advantage of high stability is achieved, and the size deviation of the movable spring and the second magnetic conduction block can be reduced through the integral injection molding.

Drawings

Fig. 1 shows the structure schematic diagram of the short-circuit resisting structure and the relay according to the embodiment of the present invention.

Fig. 2 shows a schematic partial structure diagram of a first short-circuit prevention structure according to an embodiment of the present invention.

Fig. 3 shows a schematic structural diagram of a first short-circuit resisting structure according to an embodiment of the present invention.

Fig. 4 shows a schematic connection diagram of the support frame and the yoke plate in the first short-circuit prevention structure of the present invention.

Fig. 5 shows a schematic structural diagram of a second antibody short-circuit structure according to an embodiment of the present invention.

Fig. 6 shows a schematic connection diagram of the support frame and the yoke plate in the second short-circuit resisting structure according to the embodiment of the present invention.

Fig. 7 shows a schematic diagram of a short-circuit resisting structure and a partial structure of a relay according to an embodiment of the present invention.

Fig. 8 shows a cross-sectional view of an anti-short circuit structure and a relay according to an embodiment of the present invention.

Fig. 9 is an isometric view of a movable contact spring at a first viewing angle in the short-circuit prevention structure and the relay according to the embodiment of the present invention.

Fig. 10 is an isometric view of a movable contact spring at a second viewing angle in the short-circuit prevention structure and the relay according to the embodiment of the present invention.

Fig. 11 shows a schematic structural diagram of the short-circuit prevention structure and the second magnetic conductive block in the relay according to the embodiment of the present invention.

Fig. 12 is a schematic structural diagram of a portion of a second short-circuit resisting structure including a gasket according to an embodiment of the present invention.

In the drawings, the reference numbers: 1. a stationary contact; 2. a ceramic body; 3. a movable spring plate; 300. a movable reed body; 301. a first groove; 302. a first projecting portion; 4. a first magnetic conduction block; 400. a magnetic conduction block body; 401. a second groove; 402. a side portion; 403. a second projection; 5. a main spring; 6. a fixed mount; 600. a third projecting portion; 7. an insulating sleeve; 8. a yoke iron plate; 9. a push rod; 10. a support frame; 1000. a main frame body; 1001. a first hole; 1002. a subframe body; 1003. a first extension portion; 1004. a second hole; 1005. positioning holes; 1006. a second extension portion; 11. a second magnetic conduction block; 1100. a convex hull; 12. soldering lugs; 13. a stationary iron core; 14. a movable iron core; 15. a reaction spring; 16. and (7) a gasket.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the following detailed description is made for the short-circuit resisting structure and the relay according to the present invention with reference to the accompanying drawings and the detailed description. The advantages and features of the present invention will become more apparent from the following description. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention. To make the objects, features and advantages of the present invention more comprehensible, please refer to the attached drawings. It should be understood that the structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limitation of the implementation of the present invention, so that the present invention does not have the essential significance in the technology, and any modification of the structure, change of the ratio relationship or adjustment of the size should still fall within the scope of the technical content disclosed in the present invention without affecting the function and the achievable purpose of the present invention.

The first embodiment is as follows:

referring to fig. 1 and 2, the short-circuit prevention structure includes a main contact assembly, a push rod assembly, a magnetic conduction assembly, and a support frame 10, the main contact assembly includes a plurality of stationary contacts 1 and a movable contact spring 3, the push rod assembly includes a fixing frame 6, an insulating sleeve 7, and a push rod 9, and the fixing frame 6, the insulating sleeve 7, and the push rod 9 are connected to form an integrated structure. Specifically, embodiment one among the anti short circuit structure, mount 6, insulating cover 7, the integrative injection moulding of push rod 9, and then can realize the push rod subassembly as whole motion, have the advantage that stability is high, and the size deviation after movable contact spring 3, the installation of second magnetic conduction piece 11 can be reduced to integrative injection moulding simultaneously. The magnetic conduction assembly comprises a first magnetic conduction block 4 and at least one second magnetic conduction block 11, the first magnetic conduction block 4 is connected with the fixed frame 6 and fixes the movable reed 3, the main spring 5 is connected between the insulating sleeve 7 and the first magnetic conduction block 4, and the single second magnetic conduction block 11 is arranged on the outer side of the fixed frame 6 and connected with the support frame 10. Specifically, the second magnetic conductive block 11 is connected to the support frame 10 by any one of riveting, bonding, welding and clamping, and in this embodiment, the second magnetic conductive block 11 is riveted to the support frame 10.

Referring to fig. 3 and 4, the specific structure of the supporting frame 10 is described in detail as follows:

the supporting frame 10 includes a main frame 1000 and sub-frame 1002 connected to two sides of the main frame 1000, one end of each sub-frame 1002 far from the main frame 1000 is connected to a first extending portion 1003, a positioning hole 1005 for connecting with a protruding portion (not marked in the figure) on the yoke plate 8 is formed in the first extending portion 1003, and the main frame 1000 and the first extending portion 1003 are parallel to each other.

Further, with reference to fig. 3 and fig. 4, when the second magnetic conductive block 11 is a single block, two first holes 1001 are formed in the main frame 1000, the first holes 1001 are circular holes, and the second magnetic conductive block 11 is fixedly connected to the main frame 1000 through the fastening members and the first holes 1001. The size of the width of the second magnetic conduction block 11 is slightly larger than the width of the main frame body 1000, the increase of the magnetic attraction between the second magnetic conduction block 11 and the first magnetic conduction block 4 can be realized by increasing the volume of the second magnetic conduction block, and further the better electric repulsion resistance can be realized.

Correspondingly, in other embodiments of the present invention, the first hole 1001 may also be other shapes except for a circular hole, such as a rectangle, a strip, a non-circular shape, a non-rectangular shape, etc., and therefore, the present invention is not further described.

Further, referring to fig. 9 and 10, the movable spring 3 includes a movable spring body 300, a first groove 301 is formed on a side of the movable spring body 300 close to the stationary contact 1, and a first protrusion 302 is formed on a side of the movable spring body 300 away from the stationary contact 1. Referring to fig. 8, the inner side of the top of the fixed frame 6 has a third protrusion 600, and the third protrusion 600 can be matched with the first groove 301, so as to connect the upper surface of the movable reed body 300 with the inner side of the top of the fixed frame 6.

Further, referring to fig. 11, the first magnetic conduction block 4 includes a magnetic conduction block body 400 and a side portion 402 connected to two sides of the magnetic conduction block body 400, a second groove 401 is formed on the magnetic conduction block body 400 on a side close to the movable spring 3, and a second protrusion 403 is formed on the magnetic conduction block body 400 on a side far from the movable spring 3. First magnetic conduction block 4 accessible second groove 401 is connected with movable spring 3's first protrusion 302, second protrusion 403 is used for being connected with the one end of main spring 5, the other end of main spring 5 and the upper surface looks butt of insulating cover 7 to the assurance is more accurate with the clearance control between first magnetic conduction block 4 and the second magnetic conduction block 11.

Please refer to fig. 8, correspondingly, the utility model discloses still provide a relay, the relay includes above-mentioned anti short circuit structure, ceramic body 2, soldering lug 12 and yoke board 8, and the inside formation of ceramic body 2 can hold the space of anti short circuit structure, and a plurality of stationary contacts 1 all are connected with ceramic body 2, the latter half of stationary contact 1 stretches into inside ceramic body 2. The ceramic body 2 is connected with a yoke iron plate 8 through a welding piece 12, the lower half part of the yoke iron plate 8 is riveted with a static iron core 13, and a push rod 9 penetrates through the yoke iron plate 8 and the static iron core 13 and is connected with a movable iron core 14. A reaction spring 15 is further provided between the movable iron core 14 and the stationary iron core 13 outside the push rod 9.

The utility model discloses a concrete working process as follows:

referring to fig. 1, 2, 3, 4, 7 and 8, when the relay is turned off, the movable iron core 14 is held at the initial position by the reaction spring 15 and the weight of the component, and a magnetic gap is formed between the movable iron core and the stationary iron core 13, and at this time, a contact gap is formed between the movable spring piece 3 and the stationary contact 1, and the movable spring piece 3 and the stationary contact 1 are turned off. When the relay is electrified, the movable iron core 14 moves upwards along with the push rod assembly, the movable reed 3 does not move continuously after contacting with the static contact 1, the movable iron core 14 moves upwards continuously, the main spring 5 is compressed, and the movable reed 3 and the static contact 1 are completely closed after the movable iron core 14 contacts with the static iron core 13. If the movable reed 3 passes through the current, a magnetic field is generated around the movable reed, and a magnetic conduction loop is formed between the first magnetic conduction block 4 and the second magnetic conduction block 11 to generate magnetic attraction. When a fault large current passes through, electric repulsion force is generated between the movable reed 3 and the fixed contact 1, the movable reed 3 is easily disconnected from the fixed contact 1 through the electric repulsion force, the electromagnetic attraction force between the first magnetic conduction block 4 and the second magnetic conduction block 11 is opposite to the direction of the electric repulsion force, the repulsion influence of the electric repulsion force on the movable reed 3 and the fixed contact 1 can be restrained, and the short circuit resisting effect is further achieved.

Example two:

referring to fig. 5 and fig. 6, the second embodiment has the same structure as that of the first embodiment, except that at least two second holes 1004 are formed in the main frame 1000, specifically, in the anti-short-circuit structure of the second embodiment, the number of the second holes 1004 is 3, the second holes 1004 are formed along the width direction of the main frame 1000, and the second holes 1004 are rectangular.

Correspondingly, in the utility model discloses an in other embodiments, second hole 1004 also can be seted up along the length direction of body frame 1000 to also can be other shapes except the rectangular hole, for example circular, rectangular shape, non-circular, non-rectangle etc. to this, the utility model discloses do not describe in any further detail.

Further, two sides of the main frame body 1000 in the width direction are respectively provided with a second extending portion 1006, the width of the second extending portion 1006 is smaller than the width of the main frame body 1000, and after the second magnetic conduction block 11 is connected with the main frame body 1000, the outer side surface of the second extending portion 1006 is flush with the outer side surface of the second magnetic conduction block 11.

Further, referring to fig. 12, at least one spacer 16 is further disposed between the main frame 1000 and the second magnetic conductive block 11, and a hollow portion through which the second magnetic conductive block 11 can pass is disposed in a center of the spacer 16. In the short-circuit resisting structure of the second embodiment, the number of the spacers 16 is two, and the distance between the second magnetic conducting block 11 and the first magnetic conducting block 4 can be adjusted by adding the spacers 16, so that the magnetic attraction between the first magnetic conducting block 4 and the second magnetic conducting block 11 is improved, and the repulsion influence of the electric repulsion on the movable contact piece 3 and the stationary contact 1 is further suppressed. Of course, in other embodiments of the present invention, the number of the gaskets 16 is not limited to two in the second embodiment, and the number and the size thereof are adjusted according to the actual working condition. Of course, in the other embodiments of the present invention, the gasket 16 may not be disposed between the second magnetic conductive block 11 and the main frame 1000, and the magnetic attraction between the first magnetic conductive block 4 and the second magnetic conductive block 11 can also be adjusted by increasing the height of the second magnetic conductive block 11.

Further, in order to realize the stability of the connection between the main frame 1000 and the second magnetic conductive block 11, a convex hull 1100 is further disposed on the top of the second magnetic conductive block 11, and the shape and size of the convex hull 1100 are adapted to the second hole 1004, so that the convex hull 1100 can be clamped with the second hole 1004. In the second embodiment, three second magnetic conductive blocks 11 are connected to the main frame 1000 in parallel.

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

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

Claims

1. An anti-short circuit structure, characterized in that: the short-circuit resisting structure comprises a main contact assembly, a push rod assembly, a magnetic conduction assembly and a support frame, wherein the main contact assembly comprises a plurality of static contacts and a movable reed, the push rod assembly comprises a fixed frame, an insulating sleeve and a push rod, and the fixed frame, the insulating sleeve and the push rod are connected to form an integrated structure; the magnetic conduction assembly comprises a first magnetic conduction block and at least one second magnetic conduction block, the first magnetic conduction block is connected with the fixing frame and fixes the movable reed, the main spring is connected between the insulating sleeve and the first magnetic conduction block, and the at least one second magnetic conduction block is arranged on the outer side of the fixing frame and connected with the supporting frame.

2. The short-circuit-resistant structure of claim 1, wherein: the support frame includes the body frame body and with the subframe body that the body frame body both sides are connected, every the extension is connected to the one end that the body frame body was kept away from to the subframe body, set up the locating hole on the extension.

3. The anti-short circuit structure of claim 2, wherein: the main frame body and the extension part are parallel to each other.

4. The anti-shorting structure according to claim 3, wherein: the main frame body is provided with at least one first hole.

5. The anti-shorting structure according to claim 3, wherein: the main frame body is provided with at least one second hole.

6. The anti-shorting structure according to claim 5, wherein: the second hole is formed along the width or length direction of the main frame body.

7. The short-circuit prevention structure of claim 6, wherein: and second extending parts are respectively arranged on two sides of the main frame body along the width direction of the movable spring plate.

8. The anti-shorting structure according to claim 7, wherein: at least one gasket is arranged between the main frame body and the second magnetic conduction block.

9. The relay, its characterized in that: the relay comprises the short-circuit resisting structure as claimed in any one of claims 1 to 8, a ceramic body, a soldering lug and a yoke plate, wherein a space capable of accommodating the short-circuit resisting structure is formed inside the ceramic body, a plurality of static contacts are connected with the ceramic body, the ceramic body is connected with the yoke plate through the soldering lug, a static iron core is connected with the yoke plate, and a push rod penetrates through the yoke plate and the static iron core and is connected with a movable iron core.

10. The relay according to claim 9, wherein: and a counter force spring is arranged between the movable iron core and the static iron core on the outer side of the push rod.