CN220085921U

CN220085921U - Vacuum relay contact assembly

Info

Publication number: CN220085921U
Application number: CN202321010395.4U
Authority: CN
Inventors: 覃奀垚; 贾冰冰; 魏哲; 朱正光; 王宇婷; 汤亮; 李声扬
Original assignee: Kunshan Guoli Electronic Technology Co ltd
Current assignee: Kunshan Guoli Electronic Technology Co ltd
Priority date: 2023-04-28
Filing date: 2023-04-28
Publication date: 2023-11-24
Anticipated expiration: 2033-04-28

Abstract

The utility model discloses a vacuum relay contact assembly, which comprises a first contact, a second contact and a contact piece used for connecting or disconnecting the first contact with the second contact, wherein the contact piece is provided with two contact ends, the first contact is provided with a contact part used for being in contact communication with one contact end, the second contact is provided with a first wall used for being in contact communication with the other contact end, the contact part and the first wall are positioned beside the same side of the contact piece, the contact part contacted with one contact end is positioned on the wall surface extension surface of the first wall, or the contact part contacted with the contact end is positioned in a section which is not more than 0.2mm away from the two sides of the wall surface extension surface of the first wall. The vacuum relay contact assembly is novel, reasonable and simple in structure, bad actions in the contact assembly breaking process can be effectively avoided, and the load breaking capacity of a vacuum relay product is greatly improved.

Description

Vacuum relay contact assembly

Technical Field

The utility model relates to the technical field of vacuum relays, in particular to a vacuum relay contact assembly.

Background

The relay is an electric control device, and is an electric appliance that causes a predetermined step change in the controlled quantity in an electric output circuit when the change in the input quantity reaches a prescribed requirement. The relay has an interactive relation between a control system and a controlled system, is generally applied to an automatic control circuit, and is actually an automatic switch which uses small current to control large current to operate, so that the relay plays roles of automatic adjustment, safety protection, circuit switching and the like in the circuit.

Fig. 1 and 2 show a commercially available vacuum relay product, which mainly comprises a first contact A4 (which can be used as a normal end and/or called an NO end), a second contact A5 (which can be used as a common end and/or called a COM end), and a contact piece A6, wherein the first contact A4 has a contact portion a40, the second contact A5 has a slot 50, and the contact piece A6 has two contact ends a60, one of the contact ends a60 is disposed opposite to the side of the contact portion a40, and the other contact end a60 is movably inserted into the slot 50; the contact piece A6 can also reciprocate under the driving of a driving mechanism in the vacuum relay (the driving mechanism adopts an electromagnetic driving mechanism and mainly consists of a coil, an armature and the like, which belong to the known technology in the vacuum relay, and are not described in excessive detail herein), so as to realize that two contact ends a60 are respectively in contact communication with the contact portion a40 and an inner side wall of the slot 50, namely, realize that the first contact A4 is in contact communication with the second contact A5; or the two contact ends a60 are separated from the contact portion a40 and an inner side wall of the slot 50, so as to disconnect the first contact A4 from the second contact A5.

However, when the vacuum relay product works, specifically, two contact ends a60 are respectively in contact communication with the contact portion a40 and an inner side wall of the slot 50, and one contact end a60 in contact with the inner side wall of the slot 50 is prone to tilting, namely: the contact tip a60 is not attached to an inner side wall of the slot 50, and the contact tip a60 only partially contacts an outer side edge of the inner side wall of the slot 50 (see fig. 3 and 4). Thus, when the contact end A60 is disconnected from the inner side wall of the slot 50, the outer side edge of the inner side wall of the slot 50 generates point discharge and electric arc with the contact end A60, and the phenomenon of arcing concentration occurs; the arc melts the outer side of an inner side wall of the slot 50, and thus the contact end a60 is adhered to the outer side, so that the vacuum relay product cannot normally operate in the load breaking process.

Accordingly, it is desirable to provide an improved vacuum relay contact assembly that overcomes the arcing concentration and adhesion between contacts caused by the contact tip a60 not being attached to an inner side wall of the slot 50, so as to improve the load breaking capability of the vacuum relay product.

Disclosure of Invention

In order to overcome the defects, the utility model provides the vacuum relay contact assembly which is novel, reasonable and simple in structure, and can effectively avoid bad actions in the opening and closing process of the contact assembly, thereby greatly improving the load opening and closing capacity of a vacuum relay product.

The technical scheme adopted by the utility model for solving the technical problems is as follows: the utility model provides a vacuum relay contact assembly, includes first contact, second contact, and is used for with first contact with the contact piece of second contact intercommunication or disconnection, the contact piece is equipped with two contact ends, first contact be equipped with supply with one contact end is contacted the contact portion of intercommunication, the second contact be equipped with supply with another contact end contact the first wall of intercommunication, contact portion with first wall is located the same side of contact piece is by, contact portion with one contact end contact the position be located on the wall extension of first wall, or contact portion with contact end contact the position be located apart from the wall extension both sides of first wall is not more than 0.2 mm.

As a further improvement of the present utility model, the second contact has a cylindrical body portion, and the first wall is formed on the body portion.

As a further development of the utility model, the first wall is inclined with respect to the main body portion central axis.

As a further improvement of the utility model, the vacuum relay contact assembly also has a second wall spaced from and disposed opposite the first wall, and a third wall joined between the second wall and the inside of the first wall, and the second wall is parallel or inclined with respect to the main body portion central axis.

As a further development of the utility model, the first wall, the second wall and the third wall together form a flared slot of larger outside and smaller inside, the flared slot being intended for the insertion of a further contact terminal.

As a further improvement of the present utility model, the first wall is inclined at an angle of 3 ° to 5 ° with respect to the central axis of the main body portion.

As a further improvement of the utility model, the contact piece is in a strip shape, the two ends of the contact piece along the length direction of the contact piece are respectively provided with the contact ends, the two contact ends are oppositely arranged, and the two opposite side edges of the two contact ends are arc-shaped edges.

As a further development of the utility model, the corner radii R of the two arcuate sides satisfy the following relation: r is more than or equal to 2.5mm and less than or equal to 4mm.

As a further improvement of the present utility model, the first contact has a base portion and a flat mounting portion integrally formed on one end of the base portion, and the contact portion is fixedly provided on the mounting portion.

The beneficial effects of the utility model are as follows: compared with the prior art, the utility model optimizes the relative position relationship between the contact part (the first contact) and the first wall (the second contact), namely, the utility model optimizes: the contact part is positioned on the wall surface extension surface of the first wall, or the contact part is positioned in a region which is not more than 0.2mm away from the two sides of the wall surface extension surface of the first wall; therefore, the contact piece can be respectively attached to the first wall and the contact part, the defect that the contact piece is not compact in attachment between the end part of the other contact end of the contact piece and the first wall and tilted is prevented, and the contact assembly has better electrical conduction performance; and when the contact piece is disconnected with the first wall and the contact part respectively, a gap is formed between the contact piece and the first wall and between the contact piece and the contact part, so that arcing phenomenon can be prevented, adhesion between the contact piece and the first wall can be avoided, and the load breaking capacity of a vacuum relay product is greatly improved.

Drawings

FIG. 1 is a schematic view of a prior art vacuum relay contact assembly in an open state;

FIG. 2 is a schematic view of a partial structure of the vacuum relay contact assembly of FIG. 1;

FIG. 3 is a schematic view of a prior art partial structure of a vacuum relay contact assembly in a closed state;

FIG. 4 is an enlarged schematic view of the portion A shown in FIG. 3;

FIG. 5 is a schematic view of a vacuum relay contact assembly according to the present utility model in a first view;

FIG. 6 is a schematic view of a vacuum relay contact assembly according to the present utility model in a second view;

fig. 7 is a schematic perspective view of a first embodiment of the second contact according to the present utility model;

FIG. 8 is an enlarged schematic view of the portion B shown in FIG. 7;

FIG. 9 is a schematic top view of the second contact of FIG. 7;

FIG. 10 is a schematic top view of a second embodiment of a second contact according to the present utility model;

FIG. 11 is a schematic perspective view of a first contact according to the present utility model;

fig. 12 is a schematic front view of a contact according to the present utility model.

The following description is made with reference to the accompanying drawings:

1. a first contact; 10. a base portion; 11. a mounting part; 12. a contact portion; 2. a second contact; 20. a horn notch; 200. a first wall; 201. a second wall; 202. a third wall; 21. a main body portion; 3. a contact piece; 30a, a first contact tip; 30b, a second contact tip; 300. an arc edge; 4. a first contact A; 40. a contact part A; 5. a second contact A; 50. a slot hole; 6. a contact sheet A; 60. contact tip a.

Detailed Description

The preferred embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.

Example 1:

referring to fig. 5 and 6, the present embodiment provides a vacuum relay contact assembly, which mainly includes a first contact 1, a second contact 2, and a contact piece 3 for connecting or disconnecting the first contact 1 with or from the second contact 2, wherein the contact piece 3 has two contact ends, one of the contact ends that is in operative engagement with the first contact 1 is denoted by a "mark 30a", and the other contact end that is in operative engagement with the second contact 2 is denoted by a "mark 30b", and can be seen in fig. 12; the first contact 1 is provided with a contact portion 12 for contacting and communicating with one contact end 30a, the second contact 2 is provided with a first wall 200 for contacting and communicating with the other contact end 30b, the contact portion 12 and the first wall 200 are positioned beside the same side of the contact piece 3, and the contact portion 12 and the contact end 30a are positioned on the wall surface extension surface of the first wall 200, or the contact portion 12 and the contact end are positioned in a section which is not more than 0.2mm away from the two sides of the wall surface extension surface of the first wall 200. By means of the contact assembly structure, when the contact piece 3 is in contact communication with the first wall 200, the first wall 200 and the other contact end 30b are in a complete fit state, and after the contact piece 3 is disconnected from the first wall 200, a gap is generated between the edge of the first wall 200 and the other contact end 30 b; therefore, when the vacuum relay contact assembly works, the phenomenon of arcing centralization after the first wall 200 and the contact piece 3 are separated can be effectively avoided, and further adhesion between the first wall and the contact end can be avoided, so that the load breaking capacity of a vacuum relay product is improved.

Description: the above-mentioned "contact piece 3 is used for connecting or disconnecting the first contact 1 and the second contact 2", and its specific implementation structure belongs to a known technology in a vacuum relay, as described in the related art. And because they are not the protection points of the present utility model patent, they are not described in detail herein.

The specific structures, particularly the specific modified structures, of the second contact 2, the contact piece 3, and the first contact 1 in the present embodiment will be described in detail below.

With continued reference to fig. 7 to 10, in this embodiment, the second contact 2 has a cylindrical main body 21 according to the layout requirements of the overall structure of the vacuum relay product. Of course, the main body 21 is not limited to the above-mentioned cylindrical shape, and may be designed into other shapes according to the overall structure of the relay, such as a quadrangular prism, and the like, which is not particularly limited herein. The first wall 200 is formed on the main body 21, and the first wall 200 is inclined with respect to the central axis of the main body 21. By virtue of the inclined state of the first wall 200, the contact area between the first wall 200 and the other contact tip 30b can be increased, so that arcing can be better dispersed, and arcing concentration phenomenon can be avoided. Further preferably, the first wall 200 has an inclination angle of 3 ° to 5 ° with respect to the central axis of the main body 21, specifically: the first wall 200 is preferably inclined at an angle of 4 ° or 3 ° with respect to the central axis of the main body portion 21.

In addition, the vacuum relay contact assembly further comprises a second wall 201 spaced from and arranged opposite to the first wall 200, and a third wall 202 connected between the second wall 201 and the inner side of the first wall 200, wherein the first wall 200, the second wall 201 and the third wall 202 together form a horn-shaped notch 20 with a large outside and a small inside, and the horn-shaped notch 20 is used for inserting another contact end 30 b.

Further, the second wall 201 is also parallel (see fig. 8 and 9) or inclined (see fig. 10) with respect to the central axis of the main body 21, that is: in use, the first wall 200 may be used as a working wall in contact with the other contact terminal 30b, or the second wall 201 in an inclined state may be used as a working wall in contact with the other contact terminal 30b, so as to promote versatility in mounting and use of the second contact 2. In addition, when the second wall 201 is designed to be inclined, the second wall 201 may be preferably designed to be mirror-symmetrically distributed with respect to the central axis of the first wall 200 with respect to the main body portion 21 (see fig. 10).

In addition, the third wall 202 may be designed to be a flat surface (see fig. 7 to 10) or a curved surface structure (not shown in the drawings) according to the processing requirements.

With continued reference to fig. 5, fig. 6 and fig. 12, the contact sheet 3 is in a strip shape, two ends of the contact sheet 3 along the length direction thereof are respectively provided with the contact ends, two contact ends are oppositely arranged, and two opposite sides of the contact ends are arc-shaped edges, so that the part indicated by the mark 300 is seen. Further preferably, the corner radii R of the two arcuate sides satisfy the following relationship: r is more than or equal to 2.5mm and less than or equal to 4mm. By carrying out the arc-shaped treatment on the edge of the contact end, the arcing can be better dispersed, so that the arcing cannot be concentrated at the same point, and the effect of better protecting products can be achieved.

With continued reference to fig. 5, 6 and 11, the first contact 1 has a base portion 10 and a flat mounting portion 11 integrally formed on one end of the base portion 10, and the contact portion 12 is fixedly disposed on the mounting portion 11.

The shape of the base portion 10 is not limited to the cylindrical shape, and may be a quadrangular prism or the like, as described above with respect to the shape of the main body portion 21, and is specifically determined according to the design requirements of the overall structure of the relay.

In the present utility model, when the other contact end 30b of the contact sheet 3 is in a normally closed state (i.e., in communication with the first wall 200), a portion of the contact portion 12 contacting one contact end 30a is located on the wall surface extension surface of the first wall 200, or a portion of the contact portion 12 contacting the contact end is located within a region not more than 0.2mm from the wall surface extension surface of the first wall 200, at this time, it is possible to achieve that the two contact ends of the contact sheet 3 are respectively bonded to the first wall 200 and the contact portion 12, and to prevent the phenomenon that the end portion of the other contact end 30b of the contact sheet 3 is not tightly bonded to the first wall 200 and is tilted, so that the contact sheet 3 has better electrical conductivity with the first wall 200 and the contact portion 12. When the contact piece 3 and the first wall 200 are in a normally open state (i.e., disconnected), a gap is generated between the contact piece 3 and the first wall 200 and between the contact piece 3 and the contact portion 12, so that the contact piece has no electrical connection function, and since the first wall 200 is disposed in a state of being inclined to the central axis direction of the main body portion 21, a gap is formed between the contact piece 3 and the first wall 200, so that an arcing phenomenon can be prevented. If arcing occurs between the contact piece 3 and the first wall 200, the contact piece 3 and/or the first wall 200 will be melted, so that adhesion between the contact piece 3 and the first wall 200 will occur, which results in problems during use of the product.

In conclusion, the vacuum relay contact assembly is novel, reasonable and simple in structure, bad actions in the contact assembly breaking process can be effectively avoided, and the load breaking capacity of a vacuum relay product is greatly improved.

In the above description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The foregoing description is only of a preferred embodiment of the utility model, which can be practiced in many other ways than as described herein, so that the utility model is not limited to the specific implementations disclosed above. While the foregoing disclosure has been described with reference to certain embodiments, it will be understood by those skilled in the art that various changes and modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the utility model. Any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present utility model without departing from the technical solution of the present utility model still falls within the scope of the technical solution of the present utility model.

Claims

1. A vacuum relay contact assembly comprising a first contact (1), a second contact (2) and a contact blade (3) for connecting or disconnecting the first contact (1) with the second contact (2), the contact blade (3) being provided with two contact tips, the first contact (1) being provided with a contact portion (12) for contact communication with one of the contact tips, the second contact (2) being provided with a first wall (200) for contact communication with the other of the contact tips, characterized in that: the contact part (12) and the first wall (200) are positioned beside the same side of the contact piece (3), the contact part (12) and one contact end are positioned on the wall surface extension surface of the first wall (200), or the contact part (12) and the contact end are positioned in a section which is not more than 0.2mm away from the two sides of the wall surface extension surface of the first wall (200).

2. The vacuum relay contact assembly of claim 1, wherein: the second contact (2) has a cylindrical main body (21), and the first wall (200) is formed on the main body (21).

3. The vacuum relay contact assembly of claim 2, wherein: the first wall (200) is inclined with respect to the central axis of the body portion (21).

4. A vacuum relay contact assembly according to claim 3, wherein: the vacuum relay contact assembly also has a second wall (201) spaced from and disposed opposite the first wall (200), and a third wall (202) joined between the second wall (201) and the inside of the first wall (200), and the second wall (201) is parallel or inclined with respect to the central axis of the main body portion (21).

5. The vacuum relay contact assembly of claim 4, wherein: the first wall (200), the second wall (201) and the third wall (202) together form a horn-shaped notch (20) with large outside and small inside, and the horn-shaped notch (20) is used for inserting another contact end.

6. A vacuum relay contact assembly according to claim 3, wherein: the first wall (200) is inclined at an angle of 3 DEG to 5 DEG with respect to the central axis of the main body (21).

7. The vacuum relay contact assembly of claim 1, wherein: the contact piece (3) is rectangular slice, contact piece (3) are equipped with respectively along its length direction's both ends contact end, two contact end sets up relatively, two contact end is opposite both sides limit that is the arc limit.

8. The vacuum relay contact assembly of claim 7, wherein: the fillet radii R of the two arc-shaped sides satisfy the following relation: r is more than or equal to 2.5mm and less than or equal to 4mm.

9. The vacuum relay contact assembly of claim 1, wherein: the first contact (1) is provided with a base body part (10) and a flat mounting part (11) integrally formed on one end of the base body part (10), and the contact part (12) is fixedly arranged on the mounting part (11).