阅读说明：本技术 一种车用电气壳体密封结构 (Electric shell sealing structure for vehicle ) 是由 彭玉洋 陈轩 鲍英超 于 2020-07-01 设计创作，主要内容包括：本发明涉及一种车用电气壳体密封结构。上壳体和下壳体之间配合有密封圈,密封圈下端形成有限位部,密封圈的上端形成有内密封部和外密封部,内密封部和外密封部的上表面与上壳体密封接触,内密封部和外密封部的下表面与下壳体密封接触,下壳体形成有与密封圈的限位部配合的限位凹槽,上壳体和下壳体位于密封圈外侧的位置通过紧固件紧固；下壳体上端面对应限位凹槽的内外侧分别机加工有内密封面和外密封面,内密封面与密封圈内密封部的下表面配合,外密封面与密封圈外密封部的下表面配合；上壳体与密封圈内密封部和外密封部接触的部位机加工有上密封面。它既能保证双重密封效果,又方便安装且具有较低的总成本。(The invention relates to a sealing structure of an electric shell for a vehicle. A sealing ring is matched between the upper shell and the lower shell, a limiting part is formed at the lower end of the sealing ring, an inner sealing part and an outer sealing part are formed at the upper end of the sealing ring, the upper surfaces of the inner sealing part and the outer sealing part are in sealing contact with the upper shell, the lower surfaces of the inner sealing part and the outer sealing part are in sealing contact with the lower shell, a limiting groove matched with the limiting part of the sealing ring is formed in the lower shell, and the positions of the upper shell and the lower shell, which are positioned at the outer side of the sealing ring, are fastened through a; the inner side and the outer side of the upper end surface of the lower shell, which correspond to the limiting groove, are respectively machined with an inner sealing surface and an outer sealing surface, the inner sealing surface is matched with the lower surface of the inner sealing part of the sealing ring, and the outer sealing surface is matched with the lower surface of the outer sealing part of the sealing ring; the upper sealing surface is machined at the contact part of the upper shell and the inner sealing part and the outer sealing part of the sealing ring. The double-seal structure can ensure double-seal effect, is convenient to install and has lower total cost.)

1. The utility model provides a vehicle electric housing seal structure, includes casing and lower casing, its characterized in that: a sealing ring is matched between the upper shell and the lower shell, a limiting part is formed at the lower end of the sealing ring, an inner sealing part and an outer sealing part are formed at the upper end of the sealing ring, the upper surfaces of the inner sealing part and the outer sealing part are in sealing contact with the upper shell, the lower surfaces of the inner sealing part and the outer sealing part are in sealing contact with the lower shell, a limiting groove matched with the limiting part of the sealing ring is formed in the lower shell, and the positions of the upper shell and the lower shell, which are positioned outside the sealing ring, are fastened through a fastener; an inner sealing surface and an outer sealing surface are respectively machined on the inner side and the outer side of the upper end surface of the lower shell, which correspond to the limiting groove, the inner sealing surface is matched with the lower surface of the inner sealing part of the sealing ring, and the outer sealing surface is matched with the lower surface of the outer sealing part of the sealing ring; and an upper sealing surface is machined at the contact part of the upper shell and the inner sealing part and the outer sealing part of the sealing ring.

2. The vehicular electric housing seal structure according to claim 1, characterized in that: the utility model discloses a sealing washer, including casing, lower casing, spacing recess, screens convex body, the spacing recess of casing is equipped with the screens convex body that a plurality of interval set up down, screens convex body up end is not higher than the up end of casing down, the spacing portion of sealing washer be equipped with a plurality of interval set up and with the screens breach that the screens convex body matches.

3. The electric housing seal structure for vehicles according to claim 1 or 2, characterized in that: the depth of the limiting groove of the lower shell is larger than the height of the limiting part of the sealing ring, and assembling protrusions are formed on two sides of the lower end of the limiting part of the sealing ring.

4. The electric housing seal structure for vehicles according to claim 1 or 2, characterized in that: the sealing ring is characterized in that the inner sealing part, the outer sealing part and the limiting part of the sealing ring are in a Y-shaped relation, the lower surface of the inner sealing part and the lower surface of the outer sealing part are both in a plane structure, the rest parts of the inner sealing part except the lower surface and the rest parts of the outer sealing part except the lower surface are both in an arc surface structure, and the inner sealing part and the outer sealing part are connected through a plane transition surface.

5. The electric housing seal structure for vehicles according to claim 1 or 2, characterized in that: the lower casing is formed with a plurality of lugs on the outside all around, and the lug is formed with the screw that is used for with last casing fastening, the upper surface of lug forms lower casing installation face through machining.

6. The vehicular electric housing seal structure according to claim 5, characterized in that: and a sealing surface tool withdrawal groove is arranged between the lower shell mounting surface and the outer sealing surface.

7. The electric housing seal structure for vehicle according to claim 1, 2 or 3, characterized in that: the periphery of the upper end of the lower shell is provided with a thickened part, the limiting groove is arranged on the thickened part, and the thickened parts of the upper shell and the lower shell are fastened through fasteners.

8. The electric housing seal structure for vehicle according to claim 1, 2 or 3, characterized in that: the corner of the sealing ring is in arc angle transition.

9. The electric housing seal structure for vehicle of claim 1, 2 or 3, wherein said upper housing is machined with an upper housing mounting surface corresponding to an outer side of the upper seal face.

Technical Field

The invention relates to a sealing structure, in particular to a sealing structure for a vehicle-mounted charger, a DC/DC converter and a high-voltage box (PDU), and can also be used for a sealing structure for an electric shell of a vehicle, which needs to be sealed between an upper shell and a lower shell.

Background

The sealing modes between the die-cast aluminum shell (or the die-cast aluminum shell and the stamping cover plate) in the current market are roughly divided into three types:

the first method comprises the following steps: the sealing effect is achieved by compressing the formed rubber ring, the sealing mode is the most common, but the sealing mode has higher requirements on surface treatment of the shell, and the more reliable sealing requires the shell with higher precision (or lower roughness), so that the cost of the product is increased.

And the second method comprises the following steps: glue is extruded out through a gluing machine according to a specified sealing track, a rubber ring is formed through curing, and then sealing is achieved through shell compression.

And the third is that: glue is extruded out according to the specified sealing track through the gluing machine, before the glue is not solidified, the upper shell and the lower shell are installed, the sealing is realized by utilizing the high adhesiveness of the glue, and the fatal defect of the sealing mode is as follows: after the glue is cured, the shell cannot be detached, and equipment maintenance is not facilitated.

Disclosure of Invention

The invention aims to provide the electric shell sealing structure for the vehicle, which can ensure the double sealing effect, is convenient to install and has lower total cost, overcomes the defects of the existing sealing structure and solves the problems in the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme: electric housing seal structure for vehicle, including last casing and lower casing, its characterized in that: a sealing ring is matched between the upper shell and the lower shell, a limiting part is formed at the lower end of the sealing ring, an inner sealing part and an outer sealing part are formed at the upper end of the sealing ring, the upper surfaces of the inner sealing part and the outer sealing part are in sealing contact with the upper shell, the lower surfaces of the inner sealing part and the outer sealing part are in sealing contact with the lower shell, a limiting groove matched with the limiting part of the sealing ring is formed in the lower shell, and the positions of the upper shell and the lower shell, which are positioned outside the sealing ring, are fastened through a fastener; an inner sealing surface and an outer sealing surface are respectively machined on the inner side and the outer side of the upper end surface of the lower shell, which correspond to the limiting groove, the inner sealing surface is matched with the lower surface of the inner sealing part of the sealing ring, and the outer sealing surface is matched with the lower surface of the outer sealing part of the sealing ring; and an upper sealing surface is machined at the contact part of the upper shell and the inner sealing part and the outer sealing part of the sealing ring. The limiting groove of the lower shell is matched with the limiting part of the sealing ring to well position the sealing ring, the limiting groove is formed by die casting, and the bottom surface and the side surface of the limiting groove do not need to be machined, so that the machining cost is effectively reduced (the limiting groove is small in size, high in machining difficulty and high in cost); the inner sealing surface and the outer sealing surface of the lower shell and the upper sealing surface of the upper shell are machined surfaces, and machining ensures that the sealing surfaces have lower roughness (namely the plane smoothness), so that the air tightness risk caused by various defects of the surfaces is greatly avoided; in addition, the inner sealing surface and the outer sealing surface of the lower shell and the upper sealing surface of the upper shell are positioned on the surfaces, so that the machining difficulty is small, the machining cost is low, the machining cost is effectively controlled, the reliable sealing contact of the upper shell and the lower shell with the sealing ring is ensured, and the integral sealing performance is ensured; the sealing ring is integrally formed by the rubber sealing ring, the manufacturing cost is low, double sealing is realized between the sealing ring and the upper shell and between the sealing ring and the lower shell, the sealing performance is greatly improved, and meanwhile, the rubber sealing ring is adopted, so that the upper shell and the lower shell are convenient to disassemble, and the maintenance is convenient.

Preferably, a plurality of clamping convex bodies arranged at intervals are arranged in the limiting groove of the lower shell, the upper end face of each clamping convex body is not higher than the upper end face of the lower shell, and a plurality of clamping notches arranged at intervals and matched with the clamping convex bodies are arranged in the limiting part of the sealing ring. Wherein, the spacing portion of sealing washer cooperates with the screens convex body in the recess for the very convenience of assembly of sealing washer also avoids the aversion of sealing washer, has guaranteed sealing performance, has realized simultaneously preventing slow-witted effect (preventing the installation dislocation) and quick positioning action.

Preferably, the depth of the limit groove of the lower shell is greater than the height of the seal ring limit part, and assembly protrusions are formed on two sides of the lower end of the seal ring limit part. The depth of the limiting groove is greater than the height of the limiting part of the sealing ring, so that the sealing ring can be installed on the lower shell in place downwards, and the reliable contact between the inner sealing part and the outer sealing part of the sealing ring and the inner sealing part and the outer sealing part of the lower shell is ensured; and the assembly bulge formed by the two sides of the lower end of the limiting part of the sealing ring is in interference fit with the limiting groove, so that the effect of fixing the whole sealing ring by the limiting groove is achieved, and the situations that the sealing ring is separated due to the fact that the sealing ring is moved, the shell is inclined or inverted in the whole machine assembly process are avoided, and the sealing is reliably realized.

Preferably, the inner sealing portion, the outer sealing portion and the limiting portion of the sealing ring are in a Y-shaped relationship, the lower surface of the inner sealing portion and the lower surface of the outer sealing portion are both in a planar structure, the rest parts of the inner sealing portion except the lower surface and the rest parts of the outer sealing portion except the lower surface are both in an arc surface structure, and the inner sealing portion and the outer sealing portion are connected through a planar transition surface. The other parts of the inner sealing part except the lower surface and the other parts of the outer sealing part except the lower surface are both arc surface structures, so that the sealing pressure is ensured, meanwhile, the pressure on the upper shell can be effectively reduced, the deformation of the upper shell is greatly reduced, the accurate compression amount of the sealing ring is ensured, and the air tightness is ensured.

Preferably, a plurality of lugs are formed on the outer side of the periphery of the lower shell, screw holes for fastening with the upper shell are formed in the lugs, and the upper surfaces of the lugs form a lower shell mounting surface through machining. The lower shell mounting surface is formed by machining, the lower shell mounting surface is used for supporting the upper shell, the accurate height difference between the upper shell mounting surface and the inner sealing surface and the outer sealing surface of the lower shell mounting surface determines the accurate compression amount of the sealing ring, and the airtightness reliability is guaranteed. The inferior valve is internal, the outer seal face and the inferior valve body installation face are the cutting feed of a machine, and the cutter diameter is bigger (the bigger milling cutter of diameter has better machining stability, and processing feed volume is bigger, and processing is faster), has not only improved production efficiency, has more greatly reduced the processing cost, more guarantees the parallelism and the difference in height of inferior valve internal, outer seal face and inferior valve body installation face to the gas tightness has been guaranteed better.

Preferably, a seal surface relief groove is provided between the lower case mounting surface and the outer seal surface. The tool withdrawal groove on the sealing surface is formed by die casting, so that a sufficient tool withdrawal space is provided when the milling cutter machine processes the sealing surface of the aluminum shell, and the defects of burrs, incomplete end surface processing and the like are avoided.

Preferably, the lower case has a thickened portion formed on an upper end periphery thereof, the stopper groove is provided in the thickened portion, and the thickened portions of the upper and lower cases are fastened by a fastener. The arrangement of the thickened part can reduce the overall thickness of the lower shell, reduce the materials used for manufacturing the lower shell and reduce the manufacturing cost; in addition, the thickened part also ensures the arrangement of the limiting groove, the inner sealing surface and the outer sealing surface, and is convenient to process.

Preferably, the corners of the sealing ring are in arc angle transition, so that the processing and manufacturing of the sealing ring are facilitated.

Preferably, the upper case has an upper case mounting surface machined on an outer side thereof corresponding to the upper sealing surface. The upper shell mounting surface is formed by one-time feed processing, the upper shell mounting surface is not only used for being matched with the lower shell mounting surface, but also the accurate height difference between the upper shell mounting surface and the upper sealing surface determines the accurate compression amount of the sealing ring, and the air tightness reliability is ensured.

The invention has the advantages of ensuring double sealing effect, convenient installation, lower total cost, reliable sealing, convenient processing and the like.

Drawings

FIG. 1 is a schematic view of the present invention with a partially cut-away, substantially solid structure;

FIG. 2 is a schematic perspective view of a seal ring according to the present invention;

FIG. 3 is a schematic view of the structure of FIG. 2 in another perspective;

FIG. 4 is a bottom view of FIG. 2;

FIG. 5 is a top view of FIG. 2;

FIG. 6 is a cross-sectional view A-A of FIG. 5;

FIG. 7 is an enlarged view of a portion of FIG. 6 at B;

FIG. 8 is an enlarged partial view at C of FIG. 6;

FIG. 9 is a schematic view of a lower housing of the present invention;

FIG. 10 is a top view of the lower housing of the present invention;

FIG. 11 is a cross-sectional view E-E of FIG. 10;

fig. 12 is a partial enlarged view at D of fig. 9.

Detailed Description

The invention is further described below with reference to the figures and specific embodiments.

As shown in fig. 1, the electric housing sealing structure for a vehicle includes an upper housing 1 and a lower housing 2, a seal ring 3 is fitted between the upper housing 1 and the lower housing 2, and the upper housing 1 and the lower housing 2 are fastened by a screw 10 at a position outside the seal ring. As shown in fig. 2 to 8, a limit portion 4 is formed at the lower end of a seal ring 3, an inner seal portion 5 and an outer seal portion 6 are formed at the upper end of the seal ring 3, the upper surfaces of the inner seal portion and the outer seal portion are in sealing contact with an upper shell, the lower surfaces of the inner seal portion and the outer seal portion are in sealing contact with a lower shell (see fig. 1), the inner seal portion 5, the outer seal portion 6 and the limit portion 4 are in a Y-shaped relationship, corners of the seal ring are in arc angle transition, the lower surface 51 of the inner seal portion 5 and the lower surface 61 of the outer seal portion 6 are both in a planar structure, the rest portions 52 of the inner seal portion 5 except the lower surface and the rest portions 62 of the outer seal portion except the lower surface are both in an arc surface structure, the inner seal portion and the outer seal portion are connected through a planar transition surface 7, and assembling protrusions 8 are formed.

As shown in fig. 9-12, the lower casing 2 is formed with a limit groove 9 matching with the limit part of the seal ring, the inner and outer sides of the upper end surface of the lower casing corresponding to the limit groove 9 are respectively machined with an inner sealing surface 11 and an outer sealing surface 12, the inner sealing surface 11 matches with the lower surface 51 of the inner sealing part 5 of the seal ring, and the outer sealing surface 12 matches with the lower surface 61 of the outer sealing part 6 of the seal ring; the upper housing 1 is machined with an upper sealing surface 13 (see fig. 1) at the contact part between the inner sealing part and the outer sealing part of the sealing ring, and an upper housing mounting surface is machined on the outer side of the upper housing corresponding to the upper sealing surface.

The limiting groove 9 of the lower shell is internally provided with four clamping convex bodies 14 arranged at intervals, the four clamping convex bodies 14 arranged at intervals are respectively positioned in the middle of four edges of the lower shell, the upper end surface of each clamping convex body 14 is flush with the inner sealing surface 11 and the outer sealing surface 12, as shown in fig. 3, 4 and 6, the limiting part of the sealing ring is provided with four clamping notches 15 arranged at intervals and matched with the clamping convex bodies 14, and the depth of the limiting groove 9 of the lower shell is greater than the height of the limiting part 4 of the sealing ring.

As shown in fig. 9-12, 12 lugs 16 are formed on the outer side of the periphery of the lower casing 2, and 12 lugs 16 are respectively distributed on four corners of the lower casing and four edges of the lower casing, so that the fastening and sealing of the upper casing and the lower casing can be ensured. Each lug 16 is formed with a screw hole 17 for fastening with the upper case, the upper surface of the lug 16 is formed into a lower case mounting surface 18 by machining, and a seal surface relief groove 19 is provided between the lower case mounting surface 18 and the outer seal surface (see fig. 12). The periphery of the upper end of the lower case is formed with a thickened portion 20, a stopper groove 9 is provided in this thickened portion 20 (see fig. 9), and the thickened portions of the upper case and the lower case are fastened by screws.

The limiting groove of the lower shell is matched with the limiting part of the sealing ring to well position the sealing ring, the limiting groove is formed by die casting, and the bottom surface and the side surface of the limiting groove do not need to be machined, so that the machining cost is effectively reduced (the limiting groove is small in size, high in machining difficulty and high in cost); the inner sealing surface and the outer sealing surface of the lower shell and the upper sealing surface of the upper shell are machined surfaces, and machining ensures that the sealing surfaces have lower roughness (namely the plane smoothness), so that the air tightness risk caused by various defects of the surfaces is greatly avoided; in addition, the inner sealing surface and the outer sealing surface of the lower shell and the upper sealing surface of the upper shell are positioned on the surfaces, so that the machining difficulty is small, the machining cost is low, the machining cost is effectively controlled, the reliable sealing contact of the upper shell and the lower shell with the sealing ring is ensured, and the integral sealing performance is ensured; the sealing ring is integrally formed by the rubber sealing ring, the manufacturing cost is low, double sealing is realized between the sealing ring and the upper shell and between the sealing ring and the lower shell, the sealing performance is greatly improved, and meanwhile, the rubber sealing ring is adopted, so that the upper shell and the lower shell are convenient to disassemble, and the maintenance is convenient.