CN218996627U

CN218996627U - Auxiliary contact structure of high-voltage direct-current relay

Info

Publication number: CN218996627U
Application number: CN202223373478.8U
Authority: CN
Inventors: 李一挺
Original assignee: Neptune Electric Kunshan Co ltd
Current assignee: Neptune Electric Kunshan Co ltd
Priority date: 2022-12-15
Filing date: 2022-12-15
Publication date: 2023-05-09
Anticipated expiration: 2032-12-15

Abstract

The utility model discloses an auxiliary contact structure of a high-voltage direct-current relay, which comprises a main contact structure, a push rod driving mechanism and a limiting support, wherein the main contact structure is provided with a main fixed contact and a main contact, the push rod driving mechanism is provided with a push rod and a limiting support A fixedly connected to the upper end of the push rod through an insulating block A, and the limiting support A and the insulating block A are surrounded to form a containing cavity A for containing and limiting the main contact; the auxiliary contact structure is provided with an auxiliary fixed contact and an auxiliary movable contact, the auxiliary fixed contact is fixedly arranged beside the main fixed contact relative to the main fixed contact, the auxiliary movable contact is arranged on the outer side of the top wall of the limiting bracket A through a limiting assembly, and the auxiliary movable contact and the auxiliary fixed contact are arranged in an up-down opposite mode; when the push rod drives the active contact piece arranged on the push rod to move upwards to be in contact with the main static contact for conduction, the auxiliary movable contact piece can move synchronously along with the active contact piece to be in contact with the auxiliary static contact for conduction. The auxiliary contact structure can be completely synchronous with the on-off operation of the main contact structure, and the synchronism and the reliability of the operation of the relay product are improved.

Description

Auxiliary contact structure of high-voltage direct-current relay

Technical Field

The utility model relates to the technical field of direct current relays, in particular to an auxiliary contact structure of a high-voltage direct current relay.

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.

In the structure of the high-voltage direct-current relay, the auxiliary contact structure usually adopts two forms, the first is a micro switch, but the action life time of the micro switch is limited, and the failure rate is high; the second is to use reed type contact structure, but the reed is easy to fatigue, unreliable in contact and easy to pollute between contacts.

In view of this, the present utility model has been made.

Disclosure of Invention

In order to overcome the defects, the utility model provides an auxiliary contact structure of a high-voltage direct current relay, which has the advantages of simple process and easy processing and manufacturing on one hand, and can completely synchronize on-off operation with the main contact structure on the other hand, thereby greatly improving the synchronism and reliability of the operation of relay products.

The technical scheme adopted by the utility model for solving the technical problems is as follows: the auxiliary contact structure of the high-voltage direct-current relay comprises a main contact structure and a push rod driving mechanism, wherein the main contact structure is provided with a main static contact and active contact pieces which are arranged opposite to the main static contact in an up-down mode, the push rod driving mechanism is provided with a push rod and a limiting support A fixedly connected to the upper end of the push rod through an insulating block A, and the limiting support A and the insulating block A are also surrounded to form a containing cavity A for containing and limiting the active contact pieces; the auxiliary contact structure is provided with an auxiliary fixed contact and an auxiliary movable contact, the auxiliary fixed contact is fixedly arranged beside the main fixed contact relative to the main fixed contact, the auxiliary movable contact is arranged on the outer side of the top wall of the limiting support A through a limiting assembly, and meanwhile, the auxiliary movable contact and the auxiliary fixed contact are oppositely arranged up and down; when the push rod drives the active contact piece arranged on the push rod to move upwards to be in contact conduction with the main static contact, the auxiliary movable contact piece can move synchronously along with the active contact piece to be in contact conduction with the auxiliary static contact.

As a further improvement of the utility model, the limiting component is provided with a limiting bracket B, an insulating block B and a contact spring B, wherein the limiting bracket B is fixedly arranged on the outer side of the top wall of the limiting bracket A through the insulating block B, and meanwhile, the limiting bracket B and the insulating block B are also surrounded to form a containing cavity B for the auxiliary movable contact to transversely pass through; the contact spring B is arranged in the accommodating cavity B, and the upper end of the contact spring B is elastically abutted to the lower side of the auxiliary movable contact piece so as to provide elastic supporting force for the auxiliary movable contact piece.

As a further improvement of the utility model, the limiting bracket B is provided with a bracket main body with an inverted U-shaped structure and two mounting parts which are respectively formed by opposite extension from the bottom edges of two side walls of the bracket main body, and the two mounting parts are respectively fixedly embedded in the insulating block B through an injection molding process; in addition, the insulating block B is fixedly arranged on the outer side of the top wall of the limiting bracket A through an injection molding process.

As a further improvement of the utility model, a boss for sleeving the lower end of the contact spring B is integrally formed on the upper side of the insulating block B.

As a further improvement of the utility model, the high voltage direct current relay further comprises a ceramic sealing cover; the two main fixed contacts are fixedly inserted in the ceramic sealing housing at intervals side by side, the two auxiliary fixed contacts are fixedly inserted in the ceramic sealing housing at intervals side by side, and meanwhile, the side-by-side arrangement direction of the two auxiliary fixed contacts is perpendicular to the side-by-side arrangement direction of the two main fixed contacts;

the active contact and the auxiliary movable contact are both arranged in the ceramic sealing housing, the active contact extends along the length of the parallel arrangement direction of the two main fixed contacts and is positioned under the two main fixed contacts at the same time, and the auxiliary movable contact extends along the length of the parallel arrangement direction of the two auxiliary fixed contacts and is positioned under the two auxiliary fixed contacts at the same time.

As a further improvement of the utility model, the limiting bracket a is provided with a bracket body with an inverted U-shaped structure and two connecting parts which are respectively formed by opposite extension from the bottom edges of two side walls of the bracket body, and the two connecting parts are respectively fixedly embedded in the insulating block a through an injection molding process; in addition, the bracket body is fixedly connected with the insulating block B through an injection molding process.

As a further improvement of the utility model, the push rod driving mechanism is also provided with a contact spring A, the contact spring A is arranged in the accommodating cavity A, and the upper end of the contact spring A is elastically abutted against the lower side of the active contact so as to provide elastic supporting force for the active contact.

As a further improvement of the utility model, the upper side of the insulating block A is integrally formed with a protruding part for sleeving the lower end of the contact spring A.

As a further improvement of the utility model, the upper end of the push rod is inserted into the ceramic sealing cover shell in a sealing way and can move up and down in the ceramic sealing cover shell, and the insulating block A is fixedly sleeved on the upper end of the push rod through an injection molding process.

The beneficial effects of the utility model are as follows: (1) in the auxiliary contact structure adopted by the utility model, the auxiliary fixed contact is fixedly inserted into the ceramic sealing housing, and the auxiliary movable contact is arranged on the outer side of the top wall of the accommodating cavity A for accommodating and limiting the active contact (particularly on the outer side of the top wall of the limiting bracket A) through the limiting assembly, so that the auxiliary movable contact and the active contact can be completely synchronized, namely the on-off operation of the auxiliary contact structure and the on-off operation of the main contact structure are completely synchronized, and the synchronism and the reliability of the relay product operation are greatly improved. (2) The auxiliary contact structure and the main contact structure adopted by the utility model both adopt direct-acting structures, so that the utility model has the advantages of simple process, easy processing and manufacturing, and difficult occurrence of spring fatigue, contact pollution and the like, and can further effectively improve the reliability of relay products.

Drawings

Fig. 1 is a schematic structural diagram of a high-voltage dc relay according to the present utility model;

fig. 2 is a schematic diagram of a partial structure of the high-voltage dc relay according to the present utility model;

FIG. 3 is a second schematic diagram of a partial structure of the HVDC relay according to the present utility model;

FIG. 4 is a schematic side view of the partial structure of the HVDC relay shown in FIG. 3 in a first view;

FIG. 5 is a schematic side view of the partial structure of the HVDC relay shown in FIG. 3 in a second view;

FIG. 6 is a schematic structural view of a push rod driving mechanism according to the present utility model;

FIG. 7 is a schematic view of the structure of the limiting bracket A according to the present utility model;

FIG. 8 is a schematic view of a restraining assembly according to the present utility model;

fig. 9 is a schematic structural view of the limiting bracket B according to the present utility model.

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

1. a ceramic seal housing; 20. a main stationary contact; 21. an active contact; 30. a push rod; 31. an insulating block A; 310. a boss; 32. limiting the bracket A; 320. a bracket body; 321. a connection part; 33. a contact spring A; 40. an auxiliary fixed contact; 41. auxiliary movable contact pieces; 50. limiting the bracket B; 500. a holder main body; 501. a mounting part; 51. an insulating block B; 510. a boss; 52. a contact spring B; 6. a movable iron core.

Detailed Description

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

Examples:

please refer to fig. 1 to 9. The utility model provides an auxiliary contact structure of a high-voltage direct-current relay, which comprises a main contact structure, a push rod driving mechanism and an auxiliary contact structure, wherein the main contact structure is provided with a main static contact 20 and an active contact 21 which is arranged opposite to the main static contact 20 in an up-down manner, the push rod driving mechanism is provided with a push rod 30 and a limiting bracket A32 fixedly connected to the upper end of the push rod 30 through an insulating block A31, the limiting bracket A32 and the insulating block A31 are also combined together to form a containing cavity A for containing and limiting the active contact 21, and in particular, the active contact 21 transversely penetrates into the containing cavity A; the auxiliary contact structure is provided with an auxiliary fixed contact 40 and an auxiliary movable contact 41, the auxiliary fixed contact 40 is fixedly arranged beside the main fixed contact 20 relative to the main fixed contact 20, the auxiliary movable contact 41 is arranged on the outer side of the top wall of the limiting bracket A32 through a limiting component (namely, the auxiliary movable contact 41 is arranged on the outer side of the top wall of the accommodating cavity A through a limiting component), and meanwhile, the auxiliary movable contact 41 and the auxiliary fixed contact 40 are also arranged in a vertically opposite mode; thus, when the push rod 30 drives the active contact piece 21 mounted thereon to move upwards to be in contact conduction with the main fixed contact 20, the auxiliary movable contact piece 41 can move synchronously with the active contact piece 21 to be in contact conduction with the auxiliary fixed contact 40. Description: the "a" and "B" in the above component names are merely for convenience of distinguishing the components, and are not limited in other specific meanings.

According to the utility model, the installation layout of the auxiliary contact structure is optimized, the auxiliary fixed contact is fixedly inserted into the ceramic sealing housing, and the auxiliary movable contact is installed on the outer side of the top wall of the accommodating cavity A for accommodating and limiting the active contact (particularly on the outer side of the top wall of the limiting bracket A) through the limiting assembly, so that the auxiliary movable contact and the active contact are completely synchronized, namely the on-off operation of the auxiliary contact structure and the on-off operation of the main contact structure are completely synchronized, and the synchronism and reliability of the relay product operation are greatly improved. In addition, the auxiliary contact structure and the main contact structure adopted by the utility model both adopt direct-acting structures, so that the utility model has the advantages of simple process, easy processing and manufacturing, and difficult occurrence of defects of spring fatigue, contact pollution and the like, and can further effectively improve the reliability of relay products.

The auxiliary contact structure, the mounting layout structure of the main contact structure, and the like are described in detail below.

First, the mounting layout structure of the auxiliary contact structure includes: a mounting layout for the auxiliary movable contact 41 and a mounting layout for the auxiliary stationary contact 40; wherein:

(1) the installation layout of the auxiliary movable contact 41 is specifically as follows:

referring to fig. 2 to 5 and fig. 8, the limiting assembly has a limiting bracket B50, an insulating block B51 and a contact spring B52, wherein the limiting bracket B50 is fixedly mounted on the outer side of the top wall of the limiting bracket a32 through the insulating block B51, and the limiting bracket B50 and the insulating block B51 together enclose a receiving cavity B for the auxiliary movable contact 41 to transversely pass through; the contact spring B52 is disposed in the accommodating cavity B, and the upper end of the contact spring B52 is elastically abutted against the lower side of the auxiliary movable contact 41, so as to provide an elastic supporting force for the auxiliary movable contact 41, so that the auxiliary movable contact 41 is abutted against the inner side of the top wall of the limiting bracket B50.

Further preferably, as shown in fig. 9, the limiting bracket B50 has a bracket body 500 with an inverted U-shaped structure, and two mounting portions 501 formed by extending from opposite bottom edges of two side walls of the bracket body 500, wherein the two mounting portions 501 are both in a flat plate structure and are fixedly embedded in the insulating block B51 respectively through an injection molding process.

In addition, the insulating block B51 is fixedly arranged on the outer side of the top wall of the limiting bracket A32 through an injection molding process; and a boss 510 for sleeving the lower end of the contact spring B52 is integrally formed on the upper side of the insulating block B51. In order to better limit the contact spring B52, it is also preferable that a mounting groove B is concavely formed on the upper side of the insulating block B51, and the boss 510 is integrally formed in the mounting groove B.

(2) The installation layout of the auxiliary stationary contact 40 is specifically as follows:

referring to fig. 1, the high-voltage direct current relay further comprises a ceramic sealing housing 1; the auxiliary static contacts 40 are two and are fixedly inserted in the ceramic sealing housing 1 at intervals side by side. Correspondingly, the auxiliary movable contact 41 is disposed in the ceramic sealing casing 1 and extends along the length of the two auxiliary fixed contacts 40 in the parallel arrangement direction, and the auxiliary movable contact 41 is also located under the two auxiliary fixed contacts 40 to be matched with the two auxiliary fixed contacts 40 in an on-off manner.

Next, the mounting layout structure of the main contact structure includes: a mounting layout for the main stationary contact 20 and a mounting layout for the active contact 21; wherein:

(1) the installation layout of the main static contact 20 is specifically as follows:

referring to fig. 1, the two main fixed contacts 20 are fixedly inserted in the ceramic sealed housing 1 at intervals, and the side-by-side arrangement direction of the two main fixed contacts 20 is perpendicular to the side-by-side arrangement direction of the two auxiliary fixed contacts 40.

(2) The installation layout of the active contact 21 is specifically as follows:

referring to fig. 1 and 2, the high-voltage dc relay further includes a magnetic circuit unit, where the magnetic circuit unit includes a coil, and a movable iron core 6 movably disposed in a space enclosed by the coil, and the movable iron core 6 is fixedly sleeved outside the lower end of the push rod 30. The upper end of the push rod 30 is sealingly inserted into the ceramic sealing casing 1, and can move up and down in the ceramic sealing casing 1 (driven by the magnetic circuit unit, which is a common knowledge and will not be described in detail herein), and the insulating block a31 is fixedly sleeved on the upper end of the push rod 30 through an injection molding process.

With continued reference to fig. 2 to 7, the limiting bracket a32 has a bracket body 320 with an inverted U-shaped structure, and two connecting portions 321 respectively extending from bottom edges of two side walls of the bracket body 320, where the two connecting portions 321 are also in a flat plate structure, and are respectively and fixedly embedded in the insulating block a31 through an injection molding process, that is: the limiting support A32 is arranged in the ceramic sealing housing 1 and is surrounded by the insulating block A31 to form the accommodating cavity A; the active contact 21 is transversely inserted into the accommodating cavity a. In addition, the bracket body 320 is also fixedly connected with the insulating block B51 through an injection molding process.

From the foregoing, it can be summarized as follows: the active contact piece 21 is built in the ceramic seal housing 1 and extends along the length of the two main fixed contacts 20 in the side-by-side arrangement direction, and meanwhile, the active contact piece 21 is located right below the two main fixed contacts 20 to be matched with the two main fixed contacts 20 in an on-off manner.

In addition, in this embodiment, preferably, the push rod driving mechanism further has a contact spring a33, the contact spring a33 is disposed in the accommodating cavity a, and an upper end of the contact spring a33 is elastically abutted against a lower side of the active contact 21, so as to provide an elastic supporting force for the active contact 21, so that the active contact 21 abuts against an inner side of a top wall of the limiting bracket a 32.

Further preferably, a protruding portion 310 for sleeving the lower end of the contact spring a33 is integrally formed on the upper side of the insulating block a 31. Of course, in order to better limit the contact spring a33, it is also preferable that a mounting groove a is concavely formed on the upper side of the insulating block a31, and the protruding portion 310 is integrally formed in the mounting groove a.

In summary, the auxiliary contact structure is optimized, so that the process is simple, the processing and the manufacturing are easy, the key is that the auxiliary contact structure is completely synchronous with the on-off operation of the main contact structure, and the synchronism and the reliability of the relay product operation are 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. The auxiliary contact structure of the high-voltage direct current relay comprises a main contact structure and a push rod driving mechanism, wherein the main contact structure is provided with a main fixed contact (20) and an active contact (21) which is arranged opposite to the main fixed contact (20) in an up-down mode, the push rod driving mechanism is provided with a push rod (30) and a limiting support A (32) fixedly connected to the upper end of the push rod (30) through an insulating block A (31), and the limiting support A (32) and the insulating block A (31) are also combined together to form a containing cavity A for containing and limiting the active contact (21); the method is characterized in that: the auxiliary contact structure is provided with an auxiliary fixed contact (40) and an auxiliary movable contact (41), the auxiliary fixed contact (40) is fixedly arranged beside the main fixed contact (20) relative to the main fixed contact (20), the auxiliary movable contact (41) is arranged on the outer side of the top wall of the limiting support A (32) through a limiting component, and meanwhile, the auxiliary movable contact (41) and the auxiliary fixed contact (40) are arranged in a vertically opposite mode; when the push rod (30) drives the active contact piece (21) arranged on the push rod to move upwards to be in contact conduction with the main fixed contact (20), the auxiliary movable contact piece (41) can synchronously move along with the active contact piece (21) to be in contact conduction with the auxiliary fixed contact (40).

2. The auxiliary contact structure of a high voltage direct current relay according to claim 1, wherein: the limiting assembly is provided with a limiting bracket B (50), an insulating block B (51) and a contact spring B (52), the limiting bracket B (50) is fixedly arranged on the outer side of the top wall of the limiting bracket A (32) through the insulating block B (51), and meanwhile, the limiting bracket B (50) and the insulating block B (51) are also surrounded to form a containing cavity B for the auxiliary movable contact piece (41) to transversely penetrate through; the contact spring B (52) is arranged in the accommodating cavity B, and the upper end of the contact spring B (52) is elastically abutted against the lower side of the auxiliary movable contact piece (41) so as to provide elastic supporting force for the auxiliary movable contact piece (41).

3. The auxiliary contact structure of a high voltage direct current relay according to claim 2, wherein: the limiting bracket B (50) is provided with a bracket main body (500) with an inverted U-shaped structure and two mounting parts (501) which are respectively formed by opposite extension from the bottom edges of two side walls of the bracket main body (500), and the two mounting parts (501) are respectively fixedly embedded in the insulating block B (51) through an injection molding process;

in addition, the insulating block B (51) is fixedly mounted on the outer side of the top wall of the limiting bracket A (32) through an injection molding process.

4. The auxiliary contact structure of a high voltage direct current relay according to claim 2, wherein: a boss (510) for sleeving the lower end of the contact spring B (52) is integrally formed on the upper side of the insulating block B (51).

5. The auxiliary contact structure of a high voltage direct current relay according to claim 2, wherein: the high-voltage direct current relay also comprises a ceramic sealing housing (1);

the two main fixed contacts (20) are fixedly inserted in the ceramic sealing housing (1) at intervals side by side, the two auxiliary fixed contacts (40) are fixedly inserted in the ceramic sealing housing (1) at intervals side by side, and meanwhile, the side-by-side arrangement direction of the two auxiliary fixed contacts (40) is perpendicular to the side-by-side arrangement direction of the two main fixed contacts (20);

the active contact (21) and the auxiliary movable contact (41) are both arranged in the ceramic sealing housing (1), the active contact (21) extends along the length of the two main fixed contacts (20) in the side-by-side arrangement direction and is positioned under the two main fixed contacts (20) at the same time, and the auxiliary movable contact (41) extends along the length of the two auxiliary fixed contacts (40) in the side-by-side arrangement direction and is positioned under the two auxiliary fixed contacts (40) at the same time.

6. The auxiliary contact structure of a high voltage direct current relay according to claim 2, wherein: the limiting support A (32) is provided with a support body (320) with an inverted U-shaped structure and two connecting parts (321) which are formed by extending from the bottom edges of two side walls of the support body (320) oppositely, and the two connecting parts (321) are fixedly embedded in the insulating block A (31) respectively through an injection molding process;

in addition, the bracket body (320) is fixedly connected with the insulating block B (51) through an injection molding process.

7. The auxiliary contact structure of a high voltage direct current relay according to claim 1, wherein: the push rod driving mechanism is further provided with a contact spring A (33), the contact spring A (33) is arranged in the accommodating cavity A, and the upper end of the contact spring A (33) is elastically abutted against the lower side of the active contact piece (21) so as to provide elastic supporting force for the active contact piece (21).

8. The auxiliary contact structure of a high voltage direct current relay according to claim 7, wherein: a protruding part (310) for sleeving the lower end of the contact spring A (33) is integrally formed on the upper side of the insulating block A (31).

9. The auxiliary contact structure of a high voltage direct current relay according to claim 5, wherein: the upper end of the push rod (30) is inserted into the ceramic sealing cover shell (1) in a sealing way and can move up and down in the ceramic sealing cover shell (1), and the insulating block A (31) is fixedly sleeved on the upper end of the push rod (30) through an injection molding process.