CN210516622U - Square epoxy packaged high-voltage direct-current relay - Google Patents

Abstract

The utility model discloses a square epoxy encapsulated high-voltage direct-current relay, which comprises a stationary contact leading-out end, an inner support cover, an iron cup, a movable reed, a push rod part, a coil part and a shell; the two stationary contact leading-out ends are arranged on an inner support cover, the inner support cover is arranged at the upper part of the iron cup, and the iron cup is sleeved into the shell from top to bottom; the inner support cover and the iron cup are respectively square, the periphery of the top end of the inner support cover is provided with a border part which protrudes towards the horizontal direction, the side wall of the inner support cover is embedded into the iron cup and is in interference fit with the iron cup, and the border part of the inner support cover is lapped on the top end surface of the opening part of the iron cup; the inner side wall of the upper part of the shell is provided with a glue dispensing groove extending from top to bottom, and the glue dispensing groove covers the outer side edge of the contact part of the edge part of the inner support cover and the top end face of the opening part of the iron cup from the side. The utility model discloses can prevent the product glue infiltration iron cup when the epoxy encapsulation and the drawback that brings.

Description

Square epoxy packaged high-voltage direct-current relay

Technical Field

The utility model relates to a direct current relay technical field especially relates to a high voltage direct current relay of square epoxy encapsulation.

Background

A relay is an electronic control device having a control system (also called an input loop) and a controlled system (also called an output loop), which is commonly used in automatic control circuits, and which is actually an "automatic switch" that uses a small current to control a large current. Therefore, the circuit plays the roles of automatic regulation, safety protection, circuit conversion and the like.

The high-voltage direct-current relay in the prior art usually adopts a sealing structure, and the sealing modes mainly comprise two sealing modes, namely ceramic sealing and epoxy sealing. The epoxy-sealed inner support cap is typically a plastic cap and the epoxy-sealed relay is substantially circular in shape. Fig. 1 is a schematic diagram of a partial structure of an epoxy-encapsulated high-voltage direct-current relay according to the prior art, fig. 2 is a sectional view of a partial structure of an epoxy-encapsulated high-voltage direct-current relay according to the prior art, and fig. 3 is an enlarged schematic diagram of a portion a of fig. 2; the high-voltage direct-current relay comprises stationary contact leading-out terminals 100, a circular inner support cover 200, a cylindrical iron cup 300, a movable spring piece 400, a pushing rod component 500, a coil component 600 and the like, wherein the two stationary contact leading-out terminals 100 are respectively arranged on the inner support cover 200, the inner support cover 200 is arranged at the upper part of the iron cup 300, the movable spring piece 400, the pushing rod component 500 and the coil component 600 are mutually accommodated in a cavity defined by the stationary contact leading-out terminals, the inner support cover 200 and the iron cup 300 in a matched mode, in order to realize sealing, the inner support cover 200 is embedded at the inner wall of the top of the iron cup 300 in the prior art, the inner support cover 200 and the iron cup 300 are fixed in an interference mode between the outer wall of the inner support cover 200 and the inner wall of the top of the iron cup 300, the inner support cover 200 is arranged on the upper surface of the cylindrical iron cup 300 during epoxy encapsulation, the size consistency of the, the glue can not leak downwards along the interference position of the edge of the inner support cover 200 and the cup opening part of the iron cup 300, and the stability of the product parameters is ensured. When the appearance of epoxy encapsulated high-voltage direct-current relay is square, it is square interior support cover and square iron cup cooperate this moment, if, still adopt to cooperate with the rim of a cup portion department of square interior support cover embedding square iron cup, then can be because square iron cup four corners position size is because of structure and technology problem, can't satisfy square iron cup and square interior support cover cooperation department size uniformity's higher condition, thereby glue can be followed in square iron cup and the square combination department of interior support cover and is infiltrated the iron cup during the epoxy encapsulation, thereby influence the normal work of spare part in the iron cup, can't guarantee the stability of product parameter.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art not enough, provide a high-voltage direct current relay of square epoxy encapsulation, through institutional advancement, can prevent the product glue infiltration iron cup when the epoxy encapsulation and the drawback brought.

The utility model provides a technical scheme that its technical problem adopted is: a high-voltage direct-current relay packaged by square epoxy comprises a stationary contact leading-out end, an inner support cover, an iron cup, a movable reed, a push rod part, a coil part and a shell; the two stationary contact leading-out ends are respectively arranged on the inner support cover, the inner support cover is arranged at the upper part of the iron cup, and the movable spring, the pushing rod component and the coil component are respectively accommodated in a cavity surrounded by the stationary contact leading-out ends, the inner support cover and the iron cup; the shell is provided with an upward opening, and the iron cup is sleeved into the shell from top to bottom; the inner support cover and the iron cup are respectively square, the periphery of the top end of the inner support cover is provided with a border part which protrudes towards the horizontal direction, the side wall of the inner support cover is embedded into the iron cup and is in interference fit with the iron cup, and the border part of the inner support cover is lapped on the top end surface of the opening part of the iron cup; the inner side wall of the upper portion of the shell is provided with a glue dispensing groove extending from top to bottom, the glue dispensing groove covers the outer side edge of the contact position of the edge portion of the inner support cover and the top end face of the opening portion of the iron cup from the side face, so that a glue dispensing body formed after glue dispensing is used for plugging a gap of the contact position of the edge portion of the inner support cover and the top end face of the opening portion of the iron cup, and gas in the inner cavity of the iron cup is prevented from diffusing to the cavity of the shell.

The bottom surface of the glue dispensing groove is an inclined surface.

The side wall of the inner support cover is divided into an upper side wall and a lower side wall by an inclined plane step, the lower side wall is provided with ribs along the vertical direction, and the inner support cover is in interference fit with the inner wall of the iron cup through the upper side wall.

In the lateral wall of the middle lower part of the shell, a plurality of grooves along the vertical direction are arranged along the circumferential surface of the shell, and the depth of the grooves along the horizontal direction is approximately the same as that of the glue dispensing grooves along the horizontal direction, so that the wall thickness of the shell at the glue dispensing grooves is approximately the same as that of the shell at the grooves.

The wall thickness of the groove is approximately the same as the wall thickness of the shell at the groove.

The coil component comprises a coil rack and a yoke plate, the coil rack is arranged at the bottom of the iron cup, and an iron core hole of the coil rack is vertically arranged; the coil rack comprises an upper retaining wall, a lower retaining wall, a winding window between the upper retaining wall and the lower retaining wall, the yoke iron plate is arranged on the upper retaining wall, and the inner support cover is arranged on the yoke iron plate; and the opposite two side edges of the bottom surface of the lower baffle wall of the coil rack are respectively provided with a convex part, so that the convex parts of the coil rack are utilized to adjust the matching between the edge part of the top end of the inner support cover and the top end surface of the opening part of the iron cup.

And a guide plate is also arranged between the inner support cover and the yoke plate, and magnetic steel for arc extinction is arranged in the guide plate.

The upper and lower baffle walls of the coil rack are square and matched with the inner cavity of the iron cup, the convex parts are four convex bracts, and the four convex bracts are respectively positioned at the edges of the four corners of the bottom surface of the lower baffle wall close to the coil rack.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model adopts the edge part which is arranged on the periphery of the top end of the inner support cover and protrudes towards the horizontal direction, the side wall of the inner support cover is embedded into the iron cup and is in interference fit with the iron cup, and the edge part of the inner support cover is put on the top end surface of the opening part of the iron cup; and a glue dispensing groove extending from top to bottom is arranged on the inner side wall of the upper part of the shell, and the glue dispensing groove covers the outer side edge of the contact part of the edge part of the inner support cover and the top end face of the opening part of the iron cup from the side. The utility model discloses a this kind of structure is because the border portion of interior support cover is taken in the top face department of the opening of iron cup, consequently, the point glue that operates above the interior support cover is followed and is glued glue and can not downward infiltration iron cup's inner chamber, again because the point is glued the groove and is led to the border portion of support cover and the contact department of the top face of the opening of iron cup, can utilize the point glue body that the point that forms after gluing seals up the gap of the contact department of the border portion of interior support cover and the top face of the opening of iron cup to prevent the gaseous outside shell chamber diffusion of iron cup inner chamber.

2. The utility model discloses owing to adopted and established the bottom surface in the groove of will gluing to the inclined plane. The structure of the utility model can increase the fluidity of the glue at the bottom on one hand; on the other hand, when the components such as the iron cup are installed in the shell, the guiding function is realized.

3. The utility model discloses owing to adopted in the lateral wall of the well lower part of shell, be equipped with a plurality ofly along vertical recess along global of shell, and the recess along the horizontal direction the degree of depth with the glue groove is roughly the same along the horizontal direction's degree of depth to the casing wall thickness that makes glue groove department is roughly the same with the casing wall thickness of groove department, and with the cell wall thickness design of recess with the casing wall thickness is roughly the same. The utility model discloses a this kind of structure can make the part mould plastics and become easier on the one hand, makes things convenient for the preparation of product, and on the other hand makes non-deformable behind the part finished product.

4. The utility model discloses owing to adopted and be equipped with the convex part respectively at the relative both sides edge of the bottom surface of the lower retaining wall of coil former. The utility model discloses a cooperation between the border portion on the top of interior support cover and the top face of the opening of iron cup can be adjusted to this kind of structure, the convex part of coil former.

The present invention will be described in further detail with reference to the accompanying drawings and examples; however, the present invention is not limited to the embodiment of the square epoxy-encapsulated hvdc relay.

Drawings

FIG. 1 is a schematic diagram of a partial structure of an epoxy encapsulated high voltage direct current relay of the prior art;

FIG. 2 is a cross-sectional view of a portion of an epoxy encapsulated high voltage DC relay according to the prior art;

FIG. 3 is an enlarged schematic view of section A of FIG. 2;

fig. 4 is a cross-sectional view of the structure of an embodiment of the present invention (along the line connecting the two stationary contact terminals);

fig. 5 is a structural sectional view (a perpendicular line along the middle of a line connecting two stationary contact terminals) of the embodiment of the present invention;

fig. 6 is a schematic view showing the matching shapes of the iron cup, the inner support cover and the stationary contact terminal according to the embodiment of the present invention;

fig. 7 is a cross-sectional view of the iron cup, the inner support cap, and the stationary contact terminal of an embodiment of the present invention in cooperation;

FIG. 8 is an enlarged schematic view of section B of FIG. 7;

fig. 9 is a schematic perspective view of an inner support cover according to an embodiment of the present invention;

fig. 10 is a schematic perspective view of an iron cup according to an embodiment of the present invention;

fig. 11 is a schematic perspective view of a housing according to an embodiment of the present invention;

FIG. 12 is a schematic view of the matching of the iron cup and the inner support cap of the comparative example during sealing;

FIG. 13 is an enlarged schematic view of section C of FIG. 12;

fig. 14 is a schematic view of the iron cup and the inner support cover according to the embodiment of the present invention;

FIG. 15 is an enlarged schematic view of section D of FIG. 14;

fig. 16 is a schematic perspective view of a bobbin according to an embodiment of the present invention;

fig. 17 is a sectional view showing a structure in which a bobbin according to an embodiment of the present invention is fitted in an iron cup;

FIG. 18 is an enlarged schematic view of section E of FIG. 17;

fig. 19 is a schematic view of the warpage of the bobbin of an embodiment of the present invention;

fig. 20 is a schematic view of the cooperation of the inner support cap, coil bobbin, and iron cup according to an embodiment of the present invention.

Detailed Description

Examples

Referring to fig. 4 to 20, the square epoxy encapsulated high-voltage direct-current relay of the present invention includes a stationary contact terminal 1, an inner support cover 2, an iron cup 3, a movable spring 4, a push rod member 5, a coil member 6 and a housing 7; the two stationary contact leading-out ends 1 are respectively arranged on the inner support cover 2, the inner support cover 2 is arranged on the upper portion of the iron cup 3, the movable spring piece 4 is arranged on the upper portion of the pushing rod part 5, the lower portion of the pushing rod part 5 is matched in the coil part 6, two ends of the movable spring piece 4 are respectively matched with bottom end surfaces of the two stationary contact leading-out ends 1, when the coil part 6 works, the coil part 6 moves upwards through the pushing rod part 5, so that two ends of the movable spring piece 4 are respectively contacted with the bottom end surfaces of the two stationary contact leading-out ends 1, closing of the stationary and movable contacts is realized, when the coil part 6 does not work, the pushing rod part 5 resets and moves downwards under the action of a spring, so that two ends of the movable spring piece 4 are respectively separated from the bottom end surfaces of the two stationary contact leading-out; the movable spring plate 4, the push rod part 5 and the coil part 6 are respectively accommodated in a cavity surrounded by the fixed contact leading-out end 1, the inner support cover 2 and the iron cup 3; the shell 7 is provided with an upward opening, and the iron cup 3 is sleeved into the shell 7 from top to bottom; the inner support cover 2 and the iron cup 3 are respectively square, the periphery of the top end of the inner support cover 2 is provided with a rim part 21 protruding towards the horizontal direction, the side wall 22 of the inner support cover 2 is embedded into the iron cup 3 and is in interference fit with the iron cup 3, and the rim part 21 of the inner support cover 2 is lapped at the top end surface 31 of the opening part of the iron cup 3; the inner side wall of the upper part of the shell 7 is provided with a dispensing groove 71 extending from top to bottom, the dispensing groove 71 covers the outer side edge of the contact position of the edge part 21 of the inner support cover and the top end surface 31 of the opening part of the iron cup from the side surface, so that a gap of the contact position of the edge part 21 of the inner support cover and the top end surface 31 of the opening part of the iron cup is sealed by using a dispensing body 8 formed after dispensing, and gas in the inner cavity of the iron cup is prevented from diffusing to the cavity of the shell.

In this embodiment, the bottom surface of the dispensing groove 71 is an inclined surface.

In this embodiment, the side wall 22 of the inner support cover 2 is divided into an upper side wall 25 and a lower side wall 26 by a bevel-shaped step 24, the lower side wall 26 is provided with a rib 23 along the vertical direction for enhancing the strength of the lower side wall 26, and the inner support cover 2 is in interference fit with the inner wall of the iron cup 3 through the upper side wall 25.

In this embodiment, a plurality of grooves 72 are formed along the circumferential surface of the housing in the outer side wall of the middle lower portion of the housing 7, and the depth of the groove 72 in the horizontal direction is substantially the same as the depth of the dispensing groove 71 in the horizontal direction, so that the wall thickness 73 of the housing at the dispensing groove is substantially the same as the wall thickness 74 of the housing at the groove.

In this embodiment, the groove wall thickness 75 of the groove is substantially the same as the shell wall thickness 74 at the groove.

In this embodiment, the coil component 6 includes a coil frame 61 and an iron yoke plate 62, the coil frame 61 is mounted on the bottom of the iron cup 3, and the core hole 614 of the coil frame 61 is vertically arranged; the coil rack comprises an upper retaining wall 611, a lower retaining wall 612 and a winding window 613 between the upper and lower retaining walls, the yoke plate 62 is mounted on the upper retaining wall 611, and the inner support cover 2 is mounted on the yoke plate 62; the opposite side edges of the bottom surface of the lower wall 612 of the bobbin 61 are respectively provided with a convex portion, so that the matching between the edge portion 21 of the top end of the inner support cover 2 and the top end surface 31 of the opening portion of the iron cup 3 can be adjusted by the convex portion of the bobbin.

In this embodiment, a guide plate 91 is further installed between the inner support cover 2 and the yoke plate 62, and a magnetic steel 92 for arc extinction is installed in the guide plate 91; the inner support cover 2 is also provided with an exhaust tube 93, and the outer shell 7 is also provided with an upper cover 94.

In this embodiment, the upper blocking wall 611 and the lower blocking wall 612 of the bobbin 61 are square-shaped and adapted to the inner cavity of the iron cup 3, the convex portions are protrusions, the number of the protrusions 63 is four, and the four protrusions 63 are respectively located at the edges near the four corners of the bottom surface of the lower blocking wall 612 of the bobbin, that is, two protrusions 63 are respectively located at two opposite sides of the bottom surface of the lower blocking wall 612.

The utility model discloses a high-voltage direct-current relay of square epoxy encapsulation, adopted the periphery of the top of interior support cover 2 to be equipped with the edge portion 21 that stretches to the horizontal direction is protruding, imbed the lateral wall 22 of interior support cover in iron cup 3 and with iron cup 3 interference fit, the edge portion 21 of interior support cover 2 is put up in the top face 31 of the opening of iron cup; and a dispensing groove 71 extending from top to bottom is arranged on the inner side wall of the upper part of the shell 7, and the dispensing groove 71 covers the outer edge of the contact part of the edge part 21 of the inner support cover 2 and the top end surface 31 of the opening part of the iron cup from the side surface. The utility model discloses a this kind of structure is because the border portion 21 of interior support cover 2 is taken in the top face 31 department of the opening of iron cup, consequently, the point glue that operates above interior support cover 2 can not permeate iron cup 3's inner chamber downwards, again because point glue groove 71 is the contact department that leads to the border portion 21 of support cover and the top face 31 of the opening of iron cup, can utilize the point glue 8 that forms after the point glue to seal up the gap of the contact department of border portion 21 of interior support cover and the top face 31 of the opening of iron cup, thereby prevent the gaseous outside shell chamber diffusion of iron cup inner chamber. Referring to fig. 12 and 13, if no dispensing slot is provided in the housing, the dispensed glue cannot flow to the outer side of the contact position between the edge portion 21 of the support cover 2 and the top end surface 31 of the opening portion of the iron cup, and the contact position between the edge portion 21 of the support cover 2 and the top end surface 31 of the opening portion of the iron cup cannot be completely sealed, so that a leakage-prone position is formed, and the gas in the inner cavity of the iron cup can diffuse into the cavity of the housing.

The utility model discloses a high voltage direct current relay of square epoxy encapsulation has adopted and has established the bottom surface of glue dispensing groove 71 to the inclined plane. The structure of the utility model can increase the fluidity of the glue at the bottom on one hand; on the other hand, when the components such as the iron cup are installed in the shell, the guiding function is realized.

The utility model discloses a high voltage direct current relay of square epoxy encapsulation has adopted in the lateral wall of the well lower part of shell 7, be equipped with a plurality ofly along vertical recess 72 along the global of shell, and recess 72 along the degree of depth of horizontal direction with glue dispensing groove 71 is roughly the same along the degree of depth of horizontal direction to make the casing wall thickness 73 of glue dispensing groove department roughly the same with the casing wall thickness 74 of groove department, and with the cell wall thickness 75 design of recess into with the casing wall thickness 74 of groove department is roughly the same. The utility model discloses a this kind of structure can make the part mould plastics and become easier on the one hand, makes things convenient for the preparation of product, and on the other hand makes non-deformable behind the part finished product.

The utility model discloses a high-voltage direct-current relay of square epoxy encapsulation has adopted the relative both sides edge of the bottom surface of the lower retaining wall 612 at coil former 61 to be equipped with two protruding bracts 63 respectively. The utility model discloses a cooperation between the border portion on the top of interior support cover and the top face of the opening of iron cup can be adjusted to this kind of structure, the protruding bud 63 of coil former. When the inner support cover 2, the guide plate 91, the iron yoke plate 62, the coil frame 61 and the iron cup 3 are matched, if the matching dimension among the inner support cover 2, the guide plate 91, the iron yoke plate 62 and the coil frame 61 is such that the bottom surface of the coil frame 61 is suspended on the bottom surface of the iron cup, the convex bract 63 can be used to abut against the bottom surface of the iron cup to form the support for the components such as the coil frame 61, if the matching dimension among the inner support cover 2, the guide plate 91, the iron yoke plate 62 and the coil frame 61 is such that the edge part 21 of the support cover cannot be contacted with the top end surface 31 of the opening part of the iron cup, namely, a gap exists between the edge part 21 of the support cover and the top end surface 31 of the opening part of the iron cup, as shown in fig. 19 and 20, when the coil frame 61 is pressed downwards, the convex bract 63 is acted by the upward force F of the iron cup 3, so that the edge of the lower baffle wall 612 of the coil frame 61 is, thereby the edge part 21 of the support cover can contact with the top end surface 31 of the opening part of the iron cup, and the infiltration of glue during the glue dispensing is avoided.

The foregoing is illustrative of the preferred embodiment of the present invention and is not to be construed as limiting the invention in any way. Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention. The technical solutions disclosed above can be used by those skilled in the art to make many possible variations and modifications, or to modify equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments by the technical entity of the present invention should fall within the protection scope of the technical solution of the present invention.

Claims (8)

1. A high-voltage direct-current relay packaged by square epoxy comprises a stationary contact leading-out end, an inner support cover, an iron cup, a movable reed, a push rod part, a coil part and a shell; the two stationary contact leading-out ends are respectively arranged on the inner support cover, the inner support cover is arranged at the upper part of the iron cup, and the movable spring, the pushing rod component and the coil component are respectively accommodated in a cavity surrounded by the stationary contact leading-out ends, the inner support cover and the iron cup; the shell is provided with an upward opening, and the iron cup is sleeved into the shell from top to bottom; the method is characterized in that: the inner support cover and the iron cup are respectively square, the periphery of the top end of the inner support cover is provided with a border part which protrudes towards the horizontal direction, the side wall of the inner support cover is embedded into the iron cup and is in interference fit with the iron cup, and the border part of the inner support cover is lapped on the top end surface of the opening part of the iron cup; the inner side wall of the upper portion of the shell is provided with a glue dispensing groove extending from top to bottom, the glue dispensing groove covers the outer side edge of the contact position of the edge portion of the inner support cover and the top end face of the opening portion of the iron cup from the side face, so that a glue dispensing body formed after glue dispensing is used for plugging a gap of the contact position of the edge portion of the inner support cover and the top end face of the opening portion of the iron cup, and gas in the inner cavity of the iron cup is prevented from diffusing to the cavity of the shell.

2. The quad epoxy encapsulated hvdc relay of claim 1, wherein: the bottom surface of the glue dispensing groove is an inclined surface.

3. The quad epoxy encapsulated hvdc relay of claim 1, wherein: the side wall of the inner support cover is divided into an upper side wall and a lower side wall by an inclined plane step, the lower side wall is provided with ribs along the vertical direction, and the inner support cover is in interference fit with the inner wall of the iron cup through the upper side wall.

4. The quad epoxy encapsulated hvdc relay of claim 1, wherein: in the lateral wall of the middle lower part of the shell, a plurality of grooves along the vertical direction are arranged along the circumferential surface of the shell, and the depth of the grooves along the horizontal direction is approximately the same as that of the glue dispensing grooves along the horizontal direction, so that the wall thickness of the shell at the glue dispensing grooves is approximately the same as that of the shell at the grooves.

5. The quad epoxy encapsulated hvdc relay of claim 4, wherein: the wall thickness of the groove is approximately the same as the wall thickness of the shell at the groove.

6. The quad epoxy encapsulated hvdc relay of claim 1, wherein: the coil component comprises a coil rack and a yoke plate, the coil rack is arranged at the bottom of the iron cup, and an iron core hole of the coil rack is vertically arranged; the coil rack comprises an upper retaining wall, a lower retaining wall, a winding window between the upper retaining wall and the lower retaining wall, the yoke iron plate is arranged on the upper retaining wall, and the inner support cover is arranged on the yoke iron plate; and the opposite two side edges of the bottom surface of the lower baffle wall of the coil rack are respectively provided with a convex part, so that the convex parts of the coil rack are utilized to adjust the matching between the edge part of the top end of the inner support cover and the top end surface of the opening part of the iron cup.

7. The quad epoxy encapsulated hvdc relay of claim 6, wherein: and a guide plate is also arranged between the inner support cover and the yoke plate, and magnetic steel for arc extinction is arranged in the guide plate.

8. The quad epoxy encapsulated hvdc relay of claim 6, wherein: the upper and lower baffle walls of the coil rack are square and matched with the inner cavity of the iron cup, the convex parts are four convex bracts, and the four convex bracts are respectively positioned at the edges of the four corners of the bottom surface of the lower baffle wall close to the coil rack.

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