Relay with auxiliary contact structure

Abstract

The utility model discloses a relay with an auxiliary contact structure, including a housing, an insulating cover, a yoke iron plate, a main contact assembly, an auxiliary contact assembly and a driving assembly are arranged in the housing, the auxiliary contact assembly includes two auxiliary static contacts, at least one auxiliary moving spring and a correcting piece arranged on the yoke iron plate corresponding to the auxiliary moving spring, the auxiliary static contact is vertically arranged on the insulating cover, and one end of the auxiliary static contact extends into a contact chamber A. The utility model arranges an auxiliary moving spring on the insulating base of the driving assembly of the relay to achieve synchronous action of the active spring and the auxiliary moving spring; arranges a correcting piece corresponding to the auxiliary moving spring on the yoke iron plate, when the auxiliary moving spring separates from the auxiliary static contact and falls, the correcting piece forms an upward torque on its end to correct it, thereby ensuring the continuous effectiveness of the auxiliary moving spring and further ensuring the reliability of the contact between the auxiliary static contact and the auxiliary moving spring.

Description

Technical Field

[0001] The utility model relates to the technical field of relays, in particular to a relay with an auxiliary contact structure. Background Art

[0002] A relay is an electronic control device used in automatic control circuits. The relay has a control system (also known as an input circuit) and a controlled system (also known as an output circuit). In fact, it is an "automatic switch" that uses a smaller current to control a larger current. Therefore, it plays the role of automatic regulation, safety protection, and circuit conversion in the circuit. As a type of relay, most of the existing high-voltage DC relays use a direct-acting structure with a moving reed, that is, they use the cooperation of two static contacts and a moving reed to connect and disconnect the load.

[0003] There are usually two sets of contacts in the relay. One set is the main contacts, which are fixed on the electromagnetic assembly and use the electromagnetic assembly to complete the on-off control of the main control circuit. The other set is the auxiliary contacts, which act as auxiliary logic switches of the circuit control function and operate simultaneously with the main contacts. The switching capacity of the auxiliary contacts is smaller than that of the main contacts, and the auxiliary contacts can be used to implement other logical operations that need to be completed when the relay is operated.

[0004] However, in order to ensure the contact reliability of the auxiliary contacts and truly feedback the on-off status of the main contacts, the overtravel of the auxiliary contacts of traditional high-voltage DC relays with auxiliary contacts usually needs to be greater than the overtravel of the main contacts, which causes the deformation of the auxiliary moving spring to be too large and exceeds its own yield strength. After multiple actions, the auxiliary moving spring undergoes plastic deformation; due to the insufficient overtravel of the auxiliary moving spring, the auxiliary contact causes excessive pressure, excessive contact resistance, and failure to connect, resulting in the inability to feedback the status of the main contacts, causing the relay to fail. Summary of the invention

[0005] In order to overcome the above defects, the utility model provides a relay with an auxiliary contact structure to overcome the problem of failure of the auxiliary moving spring in the prior art.

[0006] The utility model adopts a technical solution to solve the technical problem: provide a relay with an auxiliary contact structure, including a housing, wherein the housing is provided with:

[0007] Insulation cover;

[0008] A yoke iron plate connected to the insulating cover and enclosing a contact chamber A with the insulating cover;

[0009] A main contact assembly, comprising two main static contacts and an active reed, wherein the main static contact is vertically arranged on the insulating cover, and one end of the main static contact is deeply inserted into the contact chamber A, and the active reed is horizontally arranged in the contact chamber A;

[0010] An auxiliary contact assembly, comprising two auxiliary static contacts, at least one auxiliary moving spring, and a correcting piece arranged on the yoke iron plate corresponding to the auxiliary moving spring, wherein the auxiliary static contact is vertically arranged on the insulating cover, and one end of the auxiliary static contact extends into the contact chamber A;

[0011] A driving assembly connects the active spring and the auxiliary moving spring, and is used to drive the active spring and the auxiliary moving spring to move synchronously, so as to realize the contact or separation between the two ends of the moving spring and the two main static contacts, and between the auxiliary moving spring and the two auxiliary static contacts.

[0012] As a further improvement of the present invention, the auxiliary movable spring includes a contact portion that contacts or separates from the auxiliary static contact, a mounting portion fixedly connected to the drive assembly, and a U-shaped connecting portion for connecting the contact portion and the mounting portion, wherein the two ends of the connecting portion are respectively connected to the contact portion and the mounting portion through an arc portion.

[0013] As a further improvement of the present invention, the correcting member is two cylindrical bodies vertically arranged on the yoke iron plate, and the two correcting members are correspondingly arranged directly below the two auxiliary static contacts. When the active spring is separated from the main static contact, the lower surface of the contact part of the auxiliary active spring is placed against the top of the correcting member.

[0014] As a further improvement of the present invention, the two auxiliary static contacts are arranged on either side of the active spring in the width direction and are spaced apart, and an auxiliary active spring is arranged directly below the two auxiliary static contacts.

[0015] As a further improvement of the present invention, the two auxiliary static contacts are respectively arranged on both sides of the active spring piece in the width direction, and an auxiliary active spring piece is respectively arranged directly below the two auxiliary static contacts.

[0016] As a further improvement of the present invention, the auxiliary movable spring is a conductive metal sheet with elastic deformation capability, so that the auxiliary movable spring is elastically deformed when it is abutted by the lower end of the auxiliary static contact or the upper end of the correcting member.

[0017] As a further improvement of the utility model, the driving assembly includes an electromagnetic unit and a push rod unit drivingly connected to the electromagnetic unit;

[0018] The electromagnetic unit is arranged on the side of the yoke plate away from the insulating cover through a U-shaped yoke, and includes a coil frame with a hollow cylindrical structure and arranged in the U-shaped yoke groove, a coil wound on the outer peripheral surface of the coil frame, and a metal cover passing through the coil frame and connected to the yoke plate at the upper end;

[0019] The metal cover and the yoke iron plate form a driving chamber B.

[0020] As a further improvement of the utility model, the push rod unit includes a first magnetic conductor, a second magnetic conductor, a bracket, an insulating base, a first elastic member and a push rod;

[0021] The active spring is disposed between the first magnetic conductor and the second magnetic conductor and is fixedly connected to the second magnetic conductor. The first magnetic conductor is a straight-line structure and is fixedly connected to the top surface of the bracket. The active spring is movably disposed in the bracket.

[0022] The second magnetic conductor is a U-shaped structure with an opening facing one side of the active spring, and two side arms thereof extend toward one side of the first magnetic conductor;

[0023] The insulating base is connected to the bottom of the bracket, and the first elastic member is arranged between the bottom surface of the second magnetic conductor and the top surface of the insulating base;

[0024] The push rod is vertically arranged, one end of which is fixedly connected to the insulating base, and the other end of which passes through the through hole on the yoke iron plate and extends into the driving chamber B;

[0025] The auxiliary moving spring is arranged on the insulating base.

[0026] As a further improvement of the utility model, the electromagnetic unit further includes a static iron core, a second elastic member and a moving iron core which are sequentially arranged in the driving chamber B from top to bottom;

[0027] The static iron core is fixedly connected to the metal cover and the upper part thereof extends into the through hole, and the static iron core is provided with a through hole coaxially arranged with the through hole;

[0028] The moving iron core is movably arranged in the driving chamber B;

[0029] The other end of the push rod passes through the through hole, the through hole and the second elastic member in sequence and is fixedly connected to the moving iron core.

[0030] As a further improvement of the utility model, arc-extinguishing magnets are respectively provided on both sides of the insulating cover in the length direction, and the two arc-extinguishing magnets are respectively clamped on the insulating cover through yoke iron clamps.

[0031] The beneficial effects of the utility model are as follows: by arranging an auxiliary moving spring on the insulating base of the driving assembly of the relay, the synchronous action of the active spring and the auxiliary moving spring is realized; by arranging a correcting piece corresponding to the auxiliary moving spring on the yoke iron plate, when the auxiliary moving spring separates from the auxiliary static contact and falls, an upward torque is formed on the end of the auxiliary moving spring through the correcting piece to correct it, thereby ensuring the continuous effectiveness of the auxiliary moving spring and further ensuring the reliability of the contact between the auxiliary static contact and the auxiliary moving spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the exploded structure of the utility model;

[0033] Figure 2 It is a top view of the utility model;

[0034] Figure 3 For this utility model Figure 2 Schematic diagram of the cross-sectional structure in the AA direction;

[0035] Figure 4 This is a schematic diagram of the structure of the auxiliary moving spring of the utility model;

[0036] Figure 5 This is a schematic diagram of the exploded structure of the first embodiment of the utility model;

[0037] Figure 6 This is a schematic diagram of the exploded structure of Embodiment 2 of the present utility model.

[0038] Combined with the accompanying drawings, the following description is given:

[0039] 1. Shell; 2. Insulating cover; 3. Yoke plate; 31. Through hole; A. Contact chamber; B. Drive chamber; 4. Main contact assembly; 41. Main static contact; 42. Active spring; 5. Auxiliary contact assembly; 51. Auxiliary static contact; 52. Auxiliary moving spring; 521. Contact portion; 522. Mounting portion; 523. Connecting portion; 524. Arc portion; 53. Correction piece; 6. Drive assembly; 61. Electromagnetic unit; 611. U-shaped yoke; 612. Coil frame; 613. Coil; 614. Metal cover; 615. Static iron core; 616. Second elastic member; 617. Moving iron core; 62. Push rod unit; 621. First magnetic conductor; 622. Second magnetic conductor; 623. Bracket; 624. Insulating base; 625. First elastic member; 626. Push rod; 7. Arc extinguishing magnet; 8. Yoke clamp. DETAILED DESCRIPTION

[0040] A preferred embodiment of the present utility model is described in detail below in conjunction with the accompanying drawings.

[0041] Embodiment 1.

[0042] See also Figure 1-5The utility model provides a relay with an auxiliary contact structure, including a housing 1, an insulating cover 2, a yoke iron plate 3, a main contact assembly 4, an auxiliary contact assembly 5, a drive assembly 6 and an arc extinguishing unit. The housing 1 has a hollow chamber, which is formed by splicing an upper housing and a lower housing. The insulating cover 2 is arranged in the upper housing. The yoke iron plate 3 is connected to the insulating cover 2 and forms a closed space with the insulating cover 2 to form a contact chamber A. The insulating cover 2 is made of ceramic material, and arc extinguishing magnets 7 are respectively provided on the outer walls on both sides of the length direction. The arc extinguishing magnets 7 are fixed between the insulating cover 2 and the upper housing through a yoke iron clamp 8.

[0043] The two main static contacts 41 are fixed side by side on the top of the insulating cover 2 for connecting to the main circuit of the external electrical equipment. The lower ends of the two main static contacts 41 extend into the contact chamber A. The active spring 42 is installed on the push rod unit 62 and is directly below the two main static contacts 41. When the push rod unit 62 is actuated, it drives the active spring 42 to contact or separate with the lower end contacts of the two main static contacts 41.

[0044] The auxiliary moving spring 52 is arranged on the push rod unit 62 and can move synchronously with the push rod unit 62. The two auxiliary static contacts 51 are conductive metal rods, which are fixed on the insulating cover 2 in parallel with each other in the vertical direction, and their respective lower ends extend into the contact chamber A and are located directly above the auxiliary moving spring 52. The auxiliary moving spring 52 is a conductive metal sheet with elastic deformation ability, so that the auxiliary moving spring 52 is elastically deformed when it is abutted by the lower end of the auxiliary static contact 51 or the upper end of the correcting member 53.

[0045] When the electromagnetic unit 61 drives the active spring 42 to move upward through the push rod unit 62, the push rod unit 62 simultaneously drives the auxiliary movable spring 52 to move upward, so that the contacts of the two main contact assemblies 4 and the contacts of the auxiliary contact assembly 5 are in corresponding contact. In the subsequent movement, the auxiliary movable spring 52 is pressed against the lower end of the auxiliary static contact 51 and deformed until the active spring 42 contacts and conducts with the contacts of the two main static contacts 41.

[0046] When the electromagnetic unit 61 is powered off, the push rod unit 62 drives the active spring 42 to move downward, and the push rod unit 62 simultaneously drives the auxiliary moving spring 52 to move downward, so that the contacts of the two main contact assemblies 4 and the contacts of the auxiliary contact assembly 5 are separated. In the subsequent movement, the lower end of the auxiliary moving spring 52 is arranged on the yoke iron plate 3 and is pushed upward, so that the deformation of the auxiliary moving spring 52 when the relay is turned on is improved.

[0047] The auxiliary movable spring piece 52 includes a contact portion 521 for contacting or separating with the auxiliary static contact 51, a mounting portion 522 fixedly connected to the driving assembly 6, and a U-shaped connecting portion 523 for connecting the contact portion 521 and the mounting portion 522, and the two ends of the connecting portion 523 are respectively connected to the contact portion 521 and the mounting portion 522 through an arc portion 524. The connecting portion 523 is a U-shaped one with the mouth downward, and the arc portion 524 formed by bending one end of the contact portion 521 and the connecting portion 523 makes the contact portion 521 tilt downward, so that the lower end contact of the auxiliary static contact 51 is in sliding contact with the contact portion 521 during the relay closing process, pushing the auxiliary movable spring piece 52 to undergo elastic deformation, thereby ensuring the reliability of contact with the auxiliary static contact 51. In addition, the overall width of the contact portion 521 is greater than the width between the two auxiliary static contacts 51, and the two correcting pieces 53 are vertically arranged cylindrical bodies and are correspondingly located on the projections of the lower ends of the two auxiliary static contacts 51, thereby ensuring stable contact between the auxiliary static contacts 51 and the contact portion 521, and the auxiliary moving spring piece 52 is stably supported and corrected by the correcting piece 53 when it falls, thereby improving the reliability of the relay.

[0048] The correcting member 53 may be formed integrally with the yoke iron plate 8 by stamping, or may be detachably connected with the yoke iron plate 8 .

[0049] Furthermore, the electromagnetic unit 61 is arranged on the side of the yoke plate 3 away from the insulating cover 2, and includes a U-shaped yoke 611, a coil frame 612, a coil 613, a metal cover 614, a static iron core 615, a second elastic member 616 and a moving iron core 617. The coil frame 612 is arranged in the U-shaped yoke 611, the coil frame 612 is a hollow cylindrical structure and is formed of an insulating material, and the coil 613 is wound around the coil frame 612. The static iron core 615 has a through hole 6151, which is traditionally arranged corresponding to the through hole 31 on the yoke iron plate 3, with the push rod unit 62 passing therethrough. The moving iron core 617 is movably arranged in the metal cover 614 and is arranged opposite to the static iron core 615. The second elastic member 616 is arranged between the static iron core 615 and the moving iron core 617 and can be respectively abutted against them. The moving iron core 617 is connected to the push rod unit 62 and is used to be attracted by the static iron core 615 when the coil 613 is energized.

[0050] The push rod unit 62 includes a first magnetizer 621, a second magnetizer 622, a bracket 623, an insulating base 624, a first elastic member 625 and a push rod 626; the first magnetizer 621 is a straight-line structure and is fixedly connected to the top surface of the bracket 623; the second magnetizer 622 is fixedly connected to the active spring 42 and is a U-shaped structure with an opening toward one side of the active spring 42, and its two side arms extend toward one side of the first magnetizer 621; the insulating base 624 is connected to the bottom of the bracket 623, and the first elastic member 625 is arranged between the bottom surface of the second magnetizer 622 and the top surface of the insulating base 624, so that the active spring 41 and the second magnetizer 622 have a situation of being away from the insulating base 624 and close to the first magnetizer 621. The push rod 626 is arranged vertically, one end of which is fixedly connected to the insulating base 624, and the other end passes through the through hole 31 on the yoke iron plate 3 and extends into the driving chamber B and is fixedly connected to the moving iron core 617.

[0051] In addition, the mounting portion of the auxiliary moving spring piece 52 is fixedly connected to the insulating base 624 so that the auxiliary moving spring piece 52 is not in conduction with the insulating base 624 .

[0052] Embodiment 2.

[0053] See also Figure 6 The difference between this embodiment and the first embodiment is that two auxiliary static contacts 51 are respectively arranged on both sides of the active spring piece 42 in the width direction, and an auxiliary moving spring piece 52 is respectively arranged directly below the two auxiliary static contacts 51. Thus, when the push rod unit 62 drives the active spring piece 42 and the auxiliary moving spring piece 52 upward, the stability of contact with the corresponding contact point is improved.

[0054] In summary, the relay with an auxiliary contact structure provided by the utility model realizes the synchronous action of the active reed and the auxiliary moving reed by arranging an auxiliary moving reed on the insulating base of the driving assembly of the relay; and by arranging a correcting piece corresponding to the auxiliary moving reed on the yoke iron plate, when the auxiliary moving reed separates from the auxiliary static contact and falls, an upward torque is formed on its end by the correcting piece to correct it, thereby ensuring the continuous effectiveness of the auxiliary moving reed and further ensuring the reliability of the contact between the auxiliary static contact and the auxiliary moving reed.

[0055] In the above description, many specific details are described to facilitate a full understanding of the present invention. However, the above description is only a preferred embodiment of the present invention. The present invention can be implemented in many other ways different from those described herein, so the present invention is not limited by the specific implementation disclosed above. At the same time, any person familiar with the technical field can make many possible changes and modifications to the technical solution of the present invention by using the methods and technical contents disclosed above without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of protection of the technical solution of the present invention.

Claims

1. A relay with an auxiliary contact structure, comprising a housing (1), characterized in that: The housing (1) is provided with: Insulation cover (2); A yoke iron plate (3) connected to the insulating cover (2) and enclosing a contact chamber (A) with the insulating cover (2); A main contact assembly (4), comprising two main stationary contacts (41) and an active reed (42), wherein the main stationary contact (41) is vertically arranged on the insulating cover (2) and one end thereof is deeply inserted into the contact chamber (A), and the active reed (42) is horizontally arranged in the contact chamber (A); An auxiliary contact assembly (5) comprising two auxiliary stationary contacts (51), at least one auxiliary movable spring (52) and a correcting piece (53) arranged on the yoke iron plate (3) corresponding to the auxiliary movable spring (52), wherein the auxiliary stationary contact (51) is vertically arranged on the insulating cover (2) and one end of the auxiliary stationary contact extends into the contact chamber (A); A driving assembly (6) is connected to the active reed (42) and the auxiliary movable reed (52) and is used to drive the active reed (42) and the auxiliary movable reed (52) to move synchronously, so as to achieve contact or separation between the two ends of the active reed (42) and the two main static contacts (41), and between the auxiliary movable reed (52) and the two auxiliary static contacts (51).

2. The relay with auxiliary contact structure according to claim 1, characterized in that: The auxiliary movable spring (52) comprises a contact portion (521) for contacting or separating with the auxiliary static contact (51), a mounting portion (522) fixedly connected to the drive assembly (6), and a U-shaped connecting portion (523) for connecting the contact portion (521) and the mounting portion (522), wherein two ends of the connecting portion (523) are respectively connected to the contact portion (521) and the mounting portion (522) via an arc portion (524).

3. The relay with auxiliary contact structure according to claim 2, characterized in that: The correcting member (53) is two cylindrical bodies vertically arranged on the yoke iron plate (3), and the two correcting members (53) are correspondingly arranged directly below the two auxiliary static contacts (51). When the active spring (42) is separated from the main static contact (41), the lower surface of the contact portion (521) of the auxiliary active spring (52) is placed against the top of the correcting member (53).

4. The relay with auxiliary contact structure according to claim 3, characterized in that: The two auxiliary static contacts (51) are arranged on either side of the active spring piece (42) in the width direction and are spaced apart. An auxiliary active spring piece (52) is arranged directly below the two auxiliary static contacts (51).

5. The relay with auxiliary contact structure according to claim 3, characterized in that: The two auxiliary static contacts (51) are respectively arranged on both sides of the active spring piece (42) in the width direction, and an auxiliary active spring piece (52) is respectively arranged directly below the two auxiliary static contacts (51).

6. The relay with auxiliary contact structure according to claim 1, characterized in that: The auxiliary movable spring (52) is a conductive metal sheet with elastic deformation capability, so that the auxiliary movable spring (52) is elastically deformed when it is abutted by the lower end of the auxiliary static contact (51) or the upper end of the correcting member (53).

7. The relay with auxiliary contact structure according to claim 1, characterized in that: The driving assembly (6) comprises an electromagnetic unit (61) and a push rod unit (62) drivingly connected to the electromagnetic unit (61); The electromagnetic unit (61) is arranged on a side of the yoke plate (3) away from the insulating cover (2) through a U-shaped yoke (611), and comprises a coil frame (612) having a hollow cylindrical structure and arranged in a groove of the U-shaped yoke (611), a coil (613) wound on the outer peripheral surface of the coil frame (612), and a metal cover (614) penetrating the coil frame (612) and having an upper end connected to the yoke plate (3); The metal cover (614) and the yoke iron plate (3) enclose a driving chamber (B).

8. The relay with auxiliary contact structure according to claim 7, characterized in that: The push rod unit (62) comprises a first magnetic conductor (621), a second magnetic conductor (622), a bracket (623), an insulating base (624), a first elastic member (625) and a push rod (626); The active spring (42) is arranged between the first magnetic conductor (621) and the second magnetic conductor (622), and is fixedly connected to the second magnetic conductor (622); the first magnetic conductor (621) is a straight-line structure and is fixedly connected to the top surface of the bracket (623); the active spring (42) is movably arranged in the bracket (623); The second magnetic conductor (622) is a U-shaped structure with its opening facing one side of the active spring sheet (42), and its two side arms extend toward one side of the first magnetic conductor (621); The insulating base (624) is connected to the bottom of the bracket (623), and the first elastic member (625) is arranged between the bottom surface of the second magnetic conductor (622) and the top surface of the insulating base (624); The push rod (626) is vertically arranged, one end of which is fixedly connected to the insulating base (624), and the other end of which passes through the through hole (31) on the yoke iron plate (3) and extends into the driving chamber (B); The auxiliary movable spring (52) is arranged on the insulating base (624).

9. The relay with auxiliary contact structure according to claim 8, characterized in that: The electromagnetic unit (61) further comprises a static iron core (615), a second elastic member (616) and a moving iron core (617) which are sequentially arranged in the driving chamber (B) from top to bottom; The static iron core (615) is fixedly connected to the metal cover (614) and the upper part thereof extends into the through hole (31); the static iron core (615) is provided with a through hole (6151) coaxially arranged with the through hole (31); The moving iron core (617) is movably arranged in the driving chamber (B); The other end of the push rod (626) passes through the through hole (31), the through hole (6151) and the second elastic member (616) in sequence and is fixedly connected to the moving iron core (617).

10. The relay with auxiliary contact structure according to claim 1, characterized in that: Arc extinguishing magnets (7) are respectively provided on both sides of the insulating cover (2) in the length direction, and the two arc extinguishing magnets (7) are respectively clamped on the insulating cover (2) by yoke iron clamps (8).

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