CN213781940U - High-voltage direct-current relay with coil terminal module - Google Patents

Abstract

The utility model relates to the technical field of relays, in particular to a high-voltage direct-current relay with a coil terminal module, which has stable structure and good reliability, and comprises a lower shell and an upper shell which are detachably connected, wherein a control module and the coil terminal module are arranged in a holding cavity formed by the lower shell and the upper shell in a surrounding way; the control module comprises an inner shell, the top of which is provided with a main contact and the bottom of which is provided with a magnetic conduction block; the push rod component consists of an insulating plate accommodated in the inner cavity of the inner shell and abutted against the magnetic conduction block, a push rod fixedly connected with the insulating plate, a moving contact which is elastically connected with the push rod and moves relative to the inner wall of the inner shell along the height direction of the inner shell, and a sealing tube which is connected with the bottom of the magnetic conduction block and accommodates a moving iron core; the coil terminal module comprises a coil frame sleeved on the sealing tube, a coil wound on the coil frame and a coil terminal electrically connected with the coil, a through groove is formed in the lower shell, a bayonet is formed in the coil terminal, the coil terminal is clamped in the through groove, and the bayonet is matched with the edge of the through groove in a locking manner.

Description

High-voltage direct-current relay with coil terminal module

Technical Field

The utility model relates to a relay technical field especially relates to a stable in structure, good reliability take high voltage direct current relay of coil terminal module.

Background

A relay is an electric control device that causes a controlled amount to change in a predetermined step change in an electric output circuit when a change in an excitation amount meets a predetermined requirement, and is mainly used for automatic adjustment, safety protection, switching circuits, and the like of the circuit. Along with the rise of green energy, high voltage direct current relay is on-vehicle, the extensive application in high voltage direct current loads such as photovoltaic and the electric pile that fills, in above-mentioned field, in order to realize high voltage direct current relay's quick installation, often design the end of drawing forth of coil terminal for straight piece, no matter adopt the mode of welding or connector connection, external power source all produces certain drawing force and bulldoze the pressure to the coil terminal at its and coil terminal junction, and the drawing force that traditional coil terminal can bear and bulldoze the pressure less, when high voltage direct current relay product stands external force, the junction of coil terminal is easy not hard up to cause contact failure, and then lead to high voltage direct current relay to become invalid, be unfavorable for promoting the market competition of product.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide a high-voltage direct-current relay with a coil terminal module, which has a stable structure and good reliability, in order to solve the technical problems that the coil terminal is not sufficient in the drawing force and the pushing force and the connection part is easy to be loosened by impact.

A high-voltage direct-current relay with a coil terminal module comprises a lower shell and an upper shell which are detachably connected, wherein the lower shell and the upper shell are enclosed to form an accommodating cavity, and a control module and the coil terminal module are arranged in the accommodating cavity from top to bottom;

the control module comprises an inner shell, a push rod assembly and a sealing tube, wherein a main contact which penetrates through the top of the upper shell and is electrically connected with an external power supply device and electrical equipment respectively is arranged at the top of the inner shell, and a magnetic conduction block is arranged at the bottom of the inner shell; the push rod assembly comprises an insulating plate accommodated in the inner cavity of the inner shell and abutted against the magnetic conduction block, a push rod fixedly connected with the insulating plate and a moving contact elastically connected with the push rod, and the moving contact is accommodated in the inner cavity of the inner shell and can move relative to the inner wall of the inner shell along the height direction of the inner shell; the sealing tube is connected with the bottom of the magnetic conduction block and accommodates a movable iron core;

the coil terminal module comprises a coil rack, a coil and coil terminals, wherein the coil rack is provided with a through hole in the middle and sleeved on the sealing pipe, the coil is wound on the coil rack, the coil terminals are respectively and electrically connected with the coil and the vehicle-mounted power supply, a through groove is formed in the lower shell, a bayonet is formed in each coil terminal, each coil terminal is clamped in the through groove, and the bayonet is respectively matched with the inner side wall and the outer edge of the through groove in a locking manner;

the coil excites the movable iron core to act after the coil terminal is electrified, and the moving contact is acted by the push rod and contacts or leaves the main contact to switch on or off the high-voltage direct-current relay when the movable iron core is excited.

In one embodiment, two opposite sides of the coil terminal are respectively provided with a bayonet, one bayonet is in lock fit with one side of the through groove, and the other bayonet is in lock fit with the other side of the through groove.

In one embodiment, the bayonet comprises a first vertical part, a transverse part and a second vertical part which are connected in sequence.

In one embodiment, the first vertical part and the second vertical part have the same depth and are arranged in parallel.

In one embodiment, a bayonet is formed on one side of the coil terminal, and the depth of the bayonet is greater than the width difference between the coil terminal and the through groove.

In one embodiment, the bayonet extends from a surface of the coil terminal corresponding to the bottom of the lower housing to a surface of the coil terminal facing away from the bottom of the lower housing, and a projection of the bayonet in a thickness direction of the coil terminal is smaller than or equal to the thickness of the coil terminal.

In one embodiment, when a projection of the bayonet in the thickness direction of the coil terminal is equal to the thickness of the coil terminal, a surface of the coil terminal corresponding to the bottom of the lower housing abuts against and is matched with the bottom surface of the through groove.

In one embodiment, when a projection of the bayonet in the thickness direction of the coil terminal is smaller than the thickness of the coil terminal, an upper edge of the through groove is in abutting fit with an inner wall surface of the bayonet.

The high-voltage direct-current relay with the coil terminal module is implemented by respectively arranging the through grooves on the lower shell and arranging the bayonet on the coil terminal, only the coil terminal needs to be clamped in the through grooves in the installation process of the high-voltage direct-current relay, and the edges of the through grooves are embedded in the bayonet, so that the coil terminal is matched with the through groove lock catch, thus, the coil terminal is respectively matched with the inner surface and the outer surface of the lower shell correspondingly through two inner side surfaces of the bayonet, the coil terminal is difficult to rock relative to the lower shell under the common matching of the inner surface and the outer surface of the lower shell at two ends of the through grooves in the use process of the high-voltage direct-current relay, the problem of poor contact between the coil terminal and a coil connection part and a vehicle-mounted power supply connection part due to looseness is avoided, and the stability and the reliability of the high-voltage direct-current relay are improved, the market competitiveness of high-voltage direct-current relay products is promoted.

Drawings

Fig. 1 is a schematic structural diagram of a high-voltage direct-current relay according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of the high-voltage direct-current relay in the embodiment shown in FIG. 1;

FIG. 3 is a schematic structural diagram of a disassembled part of the high-voltage direct-current relay in the embodiment shown in FIG. 1;

fig. 4 is an exploded view of the high-voltage dc relay in the embodiment of fig. 1;

fig. 5 is a schematic structural diagram of a coil terminal according to an embodiment of the present invention;

FIG. 6 is an enlarged partial view of the portion A in the embodiment shown in FIG. 3;

fig. 7 is a schematic structural diagram of a coil terminal according to another embodiment of the present invention.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

Please combine fig. 1 and fig. 2, the utility model provides a stable in structure and good reliability's high-voltage direct current relay 10 of taking coil terminal module, this high-voltage direct current relay 10 is including dismantling lower casing 100 and last casing 200 of connection, for example, lower casing 100 is connected with last casing 200 buckle, the button hole has been seted up on going up casing 200, be provided with the pin of buckleing on the lower casing 100, thus, in the assembling process of high-voltage direct current relay 10, only need imbed the pin of lower casing 100 in the button hole of casing 200, can realize the assembly of last casing 200 and lower casing 100. The assembled lower housing 100 and the upper housing 200 surround to form a receiving cavity 300, and the receiving cavity 300 is provided with a control module 400 and a coil terminal module 500 from top to bottom, and it can also be understood that the coil terminal modules 500 are disposed at the bottom of the control module 400 or both are sequentially disposed along the height direction of the high-voltage direct-current relay 10.

Referring to fig. 2 to 4, the control module 400 includes an inner housing 410, a push rod assembly 420 and a sealing tube 430, wherein a main contact penetrating through the top of the upper housing 200 and electrically connected to an external power device and an electrical device is disposed on the top of the inner housing 410, i.e., the main contact sequentially penetrates through the top of the upper housing 200 and the top of the inner housing 410 and is inserted into the inner cavity of the inner housing 410, and a magnetic conductive block 411 is disposed at the bottom of the inner housing 410. The push rod assembly 420 comprises an insulating plate 421 accommodated in the inner cavity of the inner housing 410 and abutted against the magnetic conducting block 411, a push rod 422 fixedly connected with the insulating plate 421, and a moving contact 423 elastically connected with the push rod 422, wherein the moving contact 423 is accommodated in the inner cavity of the inner housing 410 and can move relative to the inner wall of the inner housing 410 along the height direction of the inner housing 410; the sealing tube 430 is connected with the bottom of the magnetic conduction block 411 and accommodates the movable iron core 440; the coil terminal module 500 includes a coil frame 510 having a through hole 511 at the middle thereof and sleeved on the sealing tube 430, a coil 520 wound on the coil frame 510, and a coil terminal 530 electrically connected to the coil 520 and the vehicle power supply, respectively, it can be understood that the sealing tube 430 is inserted into the through hole 511 of the coil frame 510, the lower housing 100 is provided with a through groove 110, the coil terminal 530 is provided with a bayonet 531, the coil terminal 530 is clamped in the through groove 110, and the bayonet 531 is respectively in locking fit with the inner side wall and the outer edge of the through groove 110; the coil 520 excites the movable iron core 440 to act after the coil terminal 530 is electrified, and the movable contact 423 is acted by the push rod 422 and contacts or leaves the main contact to switch on or off the high-voltage direct-current relay 10 when the movable iron core 440 is excited.

In the implementation of the high voltage direct current relay 10 with the coil terminal module of the present invention, the through groove 110 is respectively formed on the lower casing 100, the bayonet 531 is formed on the coil terminal 530, during the installation process of the high voltage direct current relay 10, the coil terminal 530 only needs to be clamped in the through groove 110, and the edge of the through groove 110 is embedded in the bayonet 531, so that the coil terminal 530 is in lock-fit with the through groove 110, thus, the coil terminal 530 is correspondingly matched with the inner surface and the outer surface of the lower casing 100 through two inner sides of the bayonet 531, during the use of the high voltage direct current relay 10, the coil terminal 530 is difficult to rock relative to the lower casing 100 under the common matching of the inner surface and the outer surface of the lower casing 100 at two ends of the through groove 110, thereby avoiding the poor contact problem caused by the looseness of the connection part of the coil terminal 530 and the coil 520 and the connection part of the coil terminal 530 and the vehicle-mounted power supply, the stability and the reliability of the structure of the high-voltage direct-current relay 10 are improved, and the market competitiveness of a high-voltage direct-current relay 10 product is favorably improved.

The inner housing 410 is used to isolate the arc generated when the main contact and the movable contact 423 are conducted from the external environment, so as to improve the safety of the high voltage direct current relay 10. The magnetic conduction block 411 is made of a ferromagnetic material and is used for isolating the inner housing 410 from the sealing tube 430, so that the electric arc generated in the switching process of the main contact and the moving contact 423 is prevented from influencing the operation of the moving iron core 440, and the operation reliability of the high-voltage direct-current relay 10 is improved. In an embodiment, the main contact includes an incoming static contact 412 and an outgoing static contact 413, wherein the incoming static contact 412 and the outgoing static contact 413 are sequentially disposed on the top of the upper housing 200 and the top of the inner housing 410 and used for transmitting current to external electrical equipment, and the incoming static contact 412 and the outgoing static contact 413 can be regarded as wires for connecting the high voltage direct current relay 10 with a load circuit and an external power supply, and the two are used together to connect or disconnect a circuit.

The push rod assembly 420 is used for acting to switch on and off the high-voltage direct-current relay 10 when the coil terminal 530 is switched on with current, in the working process of the high-voltage direct-current relay 10, when the coil terminal 530 is not switched on with current, the movable iron core 440 is in a non-excitation state, under the condition, the movable iron core 440 has no acting force on the push rod 422, and the push rod 422 drives the insulating plate 421 to move towards the direction close to the bottom of the inner shell 410 in a natural state, so that the movable contact 423 is disconnected from the main contact; when the coil terminal 530 is connected to the vehicle-mounted power supply of the vehicle, the coil 520 wound around the coil frame 510 is energized to generate a magnetic field, and thus the movable iron core 440 in the magnetic field is excited by the magnetic field and pushes the push rod 422 and the insulating plate 421 to move in a direction close to the top of the inner housing 410, so that the movable contact 423 is connected to the main contact.

The insulating plate 421 is used for installing the movable contact 423, so that the movable contact 423 moves along with the insulating plate 421 when the push rod 422 moves, that is, the movable contact 423 is indirectly connected with the push rod 422, and the insulating plate is also used for insulating and isolating the movable contact 423 from the push rod 422. In one embodiment, the insulating plate 421 is made of plastic, for example, the insulating plate 421 may be made of high temperature resistant nylon PA6T or PA 10T.

The coil terminal module 500 is used for exciting the movable iron core 440 in the control module 400 under the power-on condition to drive the push rod assembly 420 of the control module 400 to act, so as to achieve the purpose of switching on and off the high-voltage direct-current relay 10 and controlling external electrical equipment. Referring to fig. 5, in an embodiment, the bayonet 531 includes a first vertical portion 531a, a horizontal portion 531b and a second vertical portion 531c connected in sequence. Preferably, the first and second vertical portions 531a and 531c are disposed in parallel and have the same depth. That is to say, bayonet 531 is a U-shaped structure, and thus, when two vertical portions of bayonet 531 are respectively abutted and matched with the inner surface and the outer surface of the lower housing 100 located at both ends of the through groove 110, the contact area of the coil terminal 530 with the inner surface and the outer surface of the lower housing 100 is the same, and thus, when the coil terminal 530 is under tension or thrust, the drawing force limit and the pushing force limit that the coil terminal 530 can reach are close, and the acting force of the lower housing 100 that two inner side walls of the bayonet 531 are under the same, thereby avoiding the problem of uneven stress at the connection part between the coil terminal 530 and the lower housing 100 due to the asymmetry of the structure of the bayonet 531, and improving the connection stability of the coil terminal 530 and the lower housing 100. In an embodiment, two opposite sides of the coil terminal 530 are respectively provided with a bayonet 531, one bayonet 531 is in lock-fit with one side of the through slot 110, and the other bayonet 531 is in lock-fit with the other side of the through slot 110, so that the fit area between the coil terminal 530 and the inner and outer surfaces of the lower housing 100 is increased, thereby improving the connection stability of the coil terminal 530 and the lower housing 100 and the working reliability of the high-voltage direct-current relay 10. Of course, in actual production, the bayonet 531 may be formed only on one side of the coil terminal 530, and the structure of the bayonet 531 is still mainly the U-shaped structure, which is not described herein again.

Referring to fig. 6, in an embodiment, when a bayonet 531 is formed on one side of the coil terminal 530, a depth of the bayonet 531 is greater than a width difference between the coil terminal 530 and the through slot 110, that is, when the coil terminal 530 is inserted into the through slot 110 and a surface of the coil terminal 530 facing away from the bayonet 531 abuts against an inner side surface of the through slot 110, a gap is formed between an end of the other inner side surface of the through slot 110 and a transverse portion 531b of the bayonet 531, so that the coil terminal 530 is smoothly inserted into the through slot 110, and the assembly difficulty of the high-voltage dc relay 10 is reduced.

In an embodiment, the bayonet 531 extends from a surface of the coil terminal 530 corresponding to the bottom of the lower housing 100 to a surface of the coil terminal 530 facing away from the bottom of the lower housing 100, a projection of the bayonet 531 in a thickness direction of the coil terminal 530 is smaller than or equal to a thickness of the coil terminal 530, and the thickness of the coil terminal 530 is a distance between two opposite broad surfaces of the coil terminal 530. When the projection of the bayonet 531 in the thickness direction of the coil terminal 530 is equal to the thickness of the coil terminal 530, that is, the bayonet 531 penetrates through two opposite wide surfaces of the coil terminal 530, under this condition, one surface of the coil terminal 530 corresponding to the bottom of the lower housing 100 is in abutting engagement with the bottom surface of the through-groove 110, that is, the bottom surface of the through-groove 110 receives the coil terminal 530. Referring to fig. 7, in another embodiment, when a projection of the bayonet 531 in the thickness direction of the coil terminal 530 is smaller than the thickness of the coil terminal 530, that is, the bayonet 531 does not penetrate through a surface of the coil terminal 530 facing away from the bottom of the lower housing 100, an upper edge of the through slot 110 is abutted against an inner wall surface of the bayonet 531 for matching, or it can be understood that the coil terminal 530 is matched with a side wall of the through slot 110 and an inner and outer surface of the lower housing 100 adjacent to the side wall, and is mounted on an edge of the through slot 110 corresponding to one side of the upper housing 200, so as to realize matching of the coil terminal 530 and the lower housing 100.

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

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

Claims (8)

1. The high-voltage direct-current relay with the coil terminal module is characterized by comprising a lower shell and an upper shell which are detachably connected, wherein the lower shell and the upper shell surround to form an accommodating cavity, and a control module and the coil terminal module are arranged in the accommodating cavity from top to bottom;

the control module comprises an inner shell, a push rod assembly and a sealing tube, wherein a main contact which penetrates through the top of the upper shell and is electrically connected with an external power supply device and electrical equipment respectively is arranged at the top of the inner shell, and a magnetic conduction block is arranged at the bottom of the inner shell; the push rod assembly comprises an insulating plate accommodated in the inner cavity of the inner shell and abutted against the magnetic conduction block, a push rod fixedly connected with the insulating plate and a moving contact elastically connected with the push rod, and the moving contact is accommodated in the inner cavity of the inner shell and can move relative to the inner wall of the inner shell along the height direction of the inner shell; the sealing tube is connected with the bottom of the magnetic conduction block and accommodates a movable iron core;

the coil terminal module comprises a coil rack, a coil and coil terminals, wherein the coil rack is provided with a through hole in the middle and sleeved on the sealing pipe, the coil is wound on the coil rack, the coil terminals are respectively and electrically connected with the coil and the vehicle-mounted power supply, a through groove is formed in the lower shell, a bayonet is formed in each coil terminal, each coil terminal is clamped in the through groove, and the bayonet is respectively matched with the inner side wall and the outer edge of the through groove in a locking manner;

the coil excites the movable iron core to act after the coil terminal is electrified, and the moving contact is acted by the push rod and contacts or leaves the main contact to switch on or off the high-voltage direct-current relay when the movable iron core is excited.

2. The HVDC relay of claim 1, wherein two opposite sides of the coil terminal are respectively provided with a bayonet, one bayonet is in lock-fit with one side of the through slot, and the other bayonet is in lock-fit with the other side of the through slot.

3. The HVDC relay of claim 2, wherein the bayonet comprises a first vertical portion, a transverse portion and a second vertical portion connected in sequence.

4. The HVDC relay of claim 3, wherein the first vertical section and the second vertical section are the same depth and are arranged in parallel.

5. The high-voltage direct current relay according to claim 1, wherein a bayonet is formed on one side of the coil terminal, and the depth of the bayonet is larger than the width difference between the coil terminal and the through groove.

6. The HVDC relay of claim 1, wherein the bayonet extends from a surface of the coil terminal corresponding to the bottom of the lower housing to a surface of the coil terminal facing away from the bottom of the lower housing, and a projection of the bayonet in a thickness direction of the coil terminal is smaller than or equal to a thickness of the coil terminal.

7. The HVDC relay of claim 6, wherein when a projection of the bayonet in the thickness direction of the coil terminal is equal to the thickness of the coil terminal, a surface of the coil terminal corresponding to the bottom of the lower housing is in abutting engagement with the bottom of the through groove.

8. The HVDC relay of claim 6, wherein when a projection of the bayonet in the thickness direction of the coil terminal is smaller than the thickness of the coil terminal, an upper edge of the through groove is in abutting fit with an inner wall surface of the bayonet.

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