CN117316715A

CN117316715A - Auxiliary contact normally closed mechanism for relay external monitoring

Info

Publication number: CN117316715A
Application number: CN202311324987.8A
Authority: CN
Inventors: 伊晨晖
Original assignee: Weifa Electronic Technology Changzhou Co ltd
Current assignee: Weifa Electronic Technology Changzhou Co ltd
Priority date: 2023-10-13
Filing date: 2023-10-13
Publication date: 2023-12-29

Abstract

The invention discloses an auxiliary contact normally-closed mechanism for relay external monitoring, which comprises a shell, wherein the shell is hollow, a magnetic conduction cylinder is arranged in the middle of the inside of the shell, a push rod is arranged in the magnetic conduction cylinder, a yoke iron plate is fixed in the middle of the shell, an insulating seat is fixed on the yoke iron plate, and ceramic is fixed on the insulating seat. The ceramic is penetrated with a fixed contact and a moving contact, the fixed contact and the moving contact are symmetrical, one end of the fixed contact is fixedly connected with a fixed iron sheet, one end of the fixed iron sheet is an arc-shaped groove, one end of the moving contact is fixedly connected with a moving iron sheet, one end of the moving iron sheet is an arc-shaped protruding block, the moving iron sheet can be jacked up by the aid of a push rod and disconnected with the fixed iron sheet, an auxiliary contact is changed from normally closed to normally open, meanwhile, the main contact of the relay is electrified, a circuit for monitoring current is monitored by adopting a simple structure, and assembly is simpler.

Description

Auxiliary contact normally closed mechanism for relay external monitoring

Technical Field

The invention belongs to the technical field of relays, and particularly relates to an auxiliary contact normally-closed mechanism for external monitoring of a relay.

Background

A relay is an electronically controlled device having a control system (also known as an input loop) and a controlled system (also known as an output loop), commonly used in automatic control circuits, which in effect is an "automatic switch" that uses a small current to control a large current. Therefore, the circuit plays roles of automatic regulation, safety protection, circuit switching and the like. The high-voltage direct current relay is one of the relays, and the high-voltage direct current relay in the prior art generally comprises a relay shell, two fixed contact moving sheets, a push rod, a movable iron core, a coil assembly, a counter-force spring for resetting the movable iron core, a contact spring for improving contact pressure and the like. When the coil component works, the movable iron core acts, and the movable contact piece is driven to move through the push rod, so that two ends of the movable contact piece are contacted with the two fixed contacts, and a load loop is communicated.

In order to further monitor the on-condition of the relay, the prior art high voltage dc relay further comprises: auxiliary contacts, which can be used to monitor the main contact loop. In the current market, the common mechanical auxiliary contacts are normally open, i.e. the auxiliary contacts are switched on or off simultaneously with the main contacts.

In some applications, the on-off state of the main contact and the auxiliary contact is required to be opposite, namely, when the main contact is opened, the auxiliary contact is closed, or when the main contact is closed, the auxiliary contact is opened, the auxiliary contact is in a normally closed structure, the structure of the normally closed auxiliary contact is complex at present, and the assembly requirement is high, so that the phenomenon becomes a problem to be solved urgently by the person in the field.

Disclosure of Invention

The invention aims at solving the problems in the background technology by aiming at the auxiliary contact normally-closed mechanism for external monitoring of a relay of the existing material collecting device.

In order to solve the technical problems, the invention provides the following technical scheme: the utility model provides an external monitoring of relay is with auxiliary contact normal close mechanism, includes the shell, characterized in that: the shell is hollow, a magnetic conduction cylinder is arranged in the middle of the inside of the shell, a push rod is arranged in the magnetic conduction cylinder, a yoke iron plate is fixed in the middle of the shell, an insulating seat is fixed on the yoke iron plate, and ceramic is fixed on the insulating seat. The ceramic is penetrated with a fixed contact and a moving contact, the fixed contact and the moving contact are symmetrical, one end of the fixed contact is fixedly connected with a fixed iron sheet, one end of the fixed iron sheet is a circular arc groove, one end of the moving contact is fixedly connected with a moving iron sheet, one end of the moving iron sheet is a circular arc protruding block, and the moving iron sheet can be matched with the circular arc groove on the fixed iron sheet.

The invention further describes that a hinge is arranged on one side of the moving iron sheet, which is close to the moving contact, so that the moving iron sheet is divided into two parts, the right part of the moving iron sheet is close to the moving contact and is fixedly connected with the moving contact, and the left part of the moving iron sheet is closed with the static iron sheet.

The invention further discloses that the left part of the moving iron sheet is provided with a groove, and the groove is matched with the top end of the push rod.

The invention further discloses that the U-shaped yoke iron is fixedly connected in the bottom of the shell, a coil is fixed between the U-shaped yoke iron and the yoke iron plate, and the coil is positioned outside the magnetic conduction cylinder.

According to the invention, the movable iron core is fixed at the bottom of the push rod, the small spring is arranged below the push rod and close to the movable iron core, the small spring penetrates through the lower half part of the push rod, the static iron core is fixedly arranged at the top of the small spring, and the static iron core is close to the yoke iron plate.

According to the invention, the contact spring is arranged at the upper part of the push rod, the push rod penetrates through the limiting block, the limiting block limits the position of one end of the contact spring, the other end of the contact spring is positioned at the middle part of the push rod, the upper part of the push rod penetrates through the moving plate, and the moving plate is positioned in the limiting block.

According to the invention, the middle position of the top of the limiting block is in threaded connection with the fixing seat, the fixing seat is provided with the groove, and the top of the push rod penetrates through the fixing seat.

Compared with the prior art, the invention has the following beneficial effects: according to the invention, the movable iron sheet is jacked up by the push rod to be disconnected with the static iron sheet, the auxiliary contact is changed from normally closed to normally open, meanwhile, the energization of the main contact of the relay is monitored, and a circuit for monitoring current is adopted by a simple structure, so that the assembly is simpler.

Drawings

The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention. In the drawings:

FIG. 1 is a schematic view of an auxiliary contact embodying the present invention;

FIG. 2 is a schematic front cross-sectional view of the present invention;

FIG. 3 is a schematic diagram of auxiliary contact closure of the present invention;

FIG. 4 is an auxiliary contact opening schematic of the present invention;

in the figure: 1. a housing; 2. a U-shaped yoke; 3. a coil; 4. a yoke plate; 5. an insulating base; 6. a moving plate; 7. a stationary contact; 8. a moving contact; 9. a ceramic; 10. a limiting block; 11. a contact spring; 12. a stationary core; 13. a movable iron core; 14. a magnetic conduction cylinder; 15. a small spring; 16. a push rod; 17. a static iron sheet; 18. a moving iron sheet; 19. a groove; 20. a fixing seat.

Detailed Description

The technical scheme of the present invention is further described in non-limiting detail below with reference to the preferred embodiments and the accompanying drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Referring to fig. 1-4, the present invention provides the following technical solutions: the utility model provides an auxiliary contact normal close mechanism for monitoring outside relay, includes shell 1, and shell 1 is cavity, and shell 1 inside middle has seted up magnetic conduction section of thick bamboo 14, and magnetic conduction section of thick bamboo 14 inside is provided with push rod 16, and shell 1 middle part is fixed with yoke board 4, is fixed with insulating seat 5 on the yoke board 4, is fixed with ceramic 9 on the insulating seat 5, and is high temperature resistant low temperature, and shock resistance is good, prevents to be out of shape by heating in the use;

the ceramic 9 is penetrated with a fixed contact 7 and a movable contact 8, the fixed contact 7 and the movable contact 8 are symmetrical, one end of the fixed contact 7 is fixedly connected with a fixed iron sheet 17, and one end of the fixed iron sheet 17 is a circular arc groove, so that the position when the ceramic is closed can be accurately positioned;

one end of the moving contact 8 is fixedly connected with a moving iron sheet 18, and one end of the moving iron sheet 18 is a circular arc-shaped protruding block which can be matched with a circular arc-shaped groove on the static iron sheet 17, so that the static iron sheet 17 and the moving iron sheet 18 can be more tightly closed;

a hinge is arranged on one side of the moving iron sheet 18, which is close to the moving contact 8, and divides the moving iron sheet 18 into two parts, wherein the right part of the moving iron sheet 18 is close to the moving contact 8 and fixedly connected with the moving contact 8, and the left part of the moving iron sheet 18 is closed with the static iron sheet 17;

the left part of the iron sheet 18 is provided with a groove 19, the groove 19 is matched with the top end of the push rod 16, when the push rod 16 moves upwards, the push rod 16 slides in the groove 19, the left part of the iron sheet 18 is jacked up by the push rod 16, the angle of the iron sheet 18 is changed, the iron sheet 18 is disconnected with the iron sheet 17, and the groove 19 can ensure that the push rod 16 accurately jacks up the left part of the iron sheet 18;

a U-shaped yoke 2 is fixedly connected in the bottom of the shell 1, a coil 3 is fixed between the U-shaped yoke 2 and the yoke plate 4, and the coil 3 is positioned outside the magnetic conduction cylinder 14;

a movable iron core 13 is fixed at the bottom of the push rod 16, a small spring 15 is arranged below the push rod 16 and close to the movable iron core 13, the small spring 15 penetrates through the lower half part of the push rod 16, a static iron core 12 is fixedly arranged at the top of the small spring 15, and the static iron core 12 is close to the yoke iron plate 4;

the upper part of the push rod 16 is provided with a contact spring 11, the push rod 16 penetrates through a limiting block 10, the limiting block 10 limits the position of one end of the contact spring 11, the other end of the contact spring 11 is positioned in the middle of the push rod 16, the upper part of the push rod 16 penetrates through a moving plate 6, and the moving plate 6 is positioned in the limiting block 10;

the middle position of the top of the limiting block 10 is in threaded connection with a fixed seat 20, a groove is formed in the fixed seat 20, and the top of the push rod 16 penetrates through the fixed seat 20;

working principle:

when the product is electrified, current is transmitted into the coil 3, the coil 3 generates a magnetic field, the movable iron core 13 is acted by magnetic force and moves upwards to drive the push rod 16 to integrally move upwards, the upper end of the push rod 16 is propped in the groove 19 to jack the movable iron sheet 18, the movable iron sheet 18 and the static iron sheet 17 are disconnected, at the moment, the movable iron core 13 and the static iron core 12 are magnetically attracted together, the small spring 15 is compressed, the contact spring 11 is compressed, the auxiliary contact state is represented to be disconnected at the moment, and the main contact of the relay is in an electrified state;

when the product is powered off, no current exists in the coil 3, the magnetic field disappears, the small spring 15 and the contact spring 11 generate elastic force to separate the movable iron core 13 from the static iron core 12, the push rod 16 is restored to the original position, the movable iron sheet 18 does not receive the acting force of the push rod 16, the movable iron sheet 18 falls down to be closed with the static iron sheet 17, the auxiliary contact is closed, and the main contact of the relay is in a non-energized state;

the device is through setting up push rod 16 with moving iron sheet 18 jack-up, breaks off with quiet iron sheet 17, auxiliary contact changes normally to normally open from normally closed, monitors relay main contact simultaneously and is electrified, adopts simple structure to monitor the return circuit of electric current, and the assembly is simpler.

In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

Finally, it should be pointed out that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting. Although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may be modified or some technical features may be equivalently replaced, and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. The utility model provides an external monitoring of relay is with auxiliary contact normal close mechanism, includes shell (1), its characterized in that: the shell (1) is hollow, a magnetic conduction cylinder (14) is arranged in the middle of the interior of the shell (1), a push rod (16) is arranged in the magnetic conduction cylinder (14), a yoke iron plate (4) is fixed in the middle of the shell (1), an insulating seat (5) is fixed on the yoke iron plate (4), and ceramic (9) is fixed on the insulating seat (5). The ceramic (9) is penetrated with a fixed contact (7) and a movable contact (8), the fixed contact (7) and the movable contact (8) are symmetrical, one end of the fixed contact (7) is fixedly connected with a static iron sheet (17), one end of the static iron sheet (17) is a circular arc groove, one end of the movable contact (8) is fixedly connected with a movable iron sheet (18), one end of the movable iron sheet (18) is a circular arc convex block, and the movable iron sheet can be matched with the circular arc groove on the static iron sheet (17).

2. The auxiliary contact normally-closed mechanism for monitoring the outside of a relay according to claim 1, wherein: one side of the moving iron sheet (18) close to the moving contact (8) is provided with a hinge, the moving iron sheet (18) is divided into two parts, the right part of the moving iron sheet (18) is close to the moving contact (8) and fixedly connected with the moving contact (8), and the left part of the moving iron sheet (18) is closed with the static iron sheet (17).

3. The auxiliary contact normally-closed mechanism for relay external monitoring according to claim 2, wherein: the left part of the moving iron sheet (18) is provided with a groove (19), and the groove (19) is matched with the top end of the push rod (16).

4. The auxiliary contact normally-closed mechanism for monitoring the outside of a relay according to claim 3, wherein: the magnetic conduction device is characterized in that a U-shaped yoke (2) is fixedly connected to the bottom of the shell (1), a coil (3) is fixed between the U-shaped yoke (2) and a yoke plate (4), and the coil (3) is located outside the magnetic conduction barrel (14).

5. The auxiliary contact normally-closed mechanism for monitoring the relay as claimed in claim 4, wherein: the utility model discloses a motor, including push rod (16), yoke iron plate (4), push rod (16), fixed with movable iron core (13) bottom, small spring (15) are installed to push rod (16) below be close to movable iron core (13) department, small spring (15) run through push rod (16) lower half, fixed mounting in small spring (15) top has quiet iron core (12), quiet iron core (12) are close to yoke iron plate (4).

6. The auxiliary contact normally-closed mechanism for monitoring the relay as claimed in claim 5, wherein: the contact spring (11) is installed on push rod (16) upper portion, push rod (16) run through there is stopper (10), stopper (10) have restricted the position of contact spring (11) one end, contact spring (11) other end is located push rod (16) middle part, push rod (16) upper portion is run through there is moving plate (6), moving plate (6) are located the inside in stopper (10).

7. The auxiliary contact normally-closed mechanism for monitoring the relay as claimed in claim 6, wherein: the middle position of the top of the limiting block (10) is in threaded connection with a fixing seat (20), a groove is formed in the fixing seat (20), and the top of the push rod (16) penetrates through the fixing seat (20).