CN215410406U - Sealing device - Google Patents

Abstract

The utility model relates to a sealing device comprising: the shell is provided with a closed cavity and is provided with a butt joint surface, the shell comprises an air vent column which is convexly arranged on the butt joint surface, and an air vent communicated with the closed cavity is formed in the air vent column. The cover body is provided with a closed surface which is abutted against the abutting surface, the closed surface is provided with an accommodating cavity and a drainage groove, the ventilation column is accommodated in the accommodating cavity, and the drainage groove is communicated with the accommodating cavity and the outside. The central axis of the ventilation column is not perpendicular to the abutting surface, and the ventilation column is opposite to the abutting surface and extends towards the direction far away from the drainage groove. So can guarantee that the closed chamber has fine liquid proof ventilative function to saved the setting of extra spare parts such as sealing washer, also improved whole sealing device's assembly efficiency. The ventilation column and the cover body are simple in structure, the manufacturing cost is relatively low, and the cost of the whole sealing device can be effectively reduced.

Description

Sealing device

Technical Field

The utility model relates to the technical field of mechanical tools, in particular to a sealing device.

Background

For the shell with the closed cavity, the closed cavity needs to have a waterproof and breathable function, namely, outside liquid drops and dust are prevented from entering the closed cavity, meanwhile, the closed cavity is communicated with the outside, the balance and consistency of the air pressure in the closed cavity and the outside atmospheric pressure are guaranteed, and the shell is prevented from being damaged due to overhigh air pressure in the closed cavity. With conventional designs, a membrane-type breather valve having a waterproof breather membrane that inhibits the passage of liquids and solids but allows the passage of gases is typically provided on the housing, with a sealing ring disposed between the membrane-type breather valve and the housing to prevent water. However, the design results in relatively more parts, which affects the installation efficiency; the sealing ring is easy to age and lose the waterproof function, so that liquid can enter the closed cavity; meanwhile, the cost of the waterproof breathable film is relatively high, and when the film type breathable valve is used in a severe cold area, the ice blocks covering the waterproof breathable film can cause the waterproof breathable film to lose the breathable function, so that the breathable function of the closed cavity is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model solves the technical problem of how to improve the assembly efficiency and reduce the manufacturing cost on the basis of ensuring the liquid-proof and air-permeable performance.

A sealing device, comprising:

the air vent structure comprises a shell, a first connecting piece and a second connecting piece, wherein the shell is provided with a closed cavity and is provided with a butting surface, the shell comprises an air vent column which is convexly arranged on the butting surface, and the air vent column is provided with an air vent communicated with the closed cavity; and

the cover body is provided with a closed surface which is abutted against the abutting surface, the closed surface is provided with an accommodating cavity and a drainage groove, the ventilation column is accommodated in the accommodating cavity, and the drainage groove is communicated with the accommodating cavity and the outside;

the central axis of the ventilation column is not perpendicular to the abutting surface, and the ventilation column is opposite to the abutting surface and extends towards the direction far away from the drainage groove.

In one embodiment, a central axis of the vent hole is disposed perpendicular to the abutment surface.

In one embodiment, the liquid separation device further comprises a liquid separation component which is arranged on the abutting surface in a protruding mode and encloses a surrounding space, the orthographic projection of the liquid separation component on the abutting surface is at least partially located in the surrounding space, and the liquid separation component is contained in the containing cavity.

In one embodiment, the liquid isolating assembly comprises a first partition strip, a second partition strip and a third partition strip, the first partition strip and the second partition strip are closer to the drainage channel relative to the third partition strip, and the first partition strip and the second partition strip are arranged at intervals and are respectively connected to two ends of the third partition strip.

In one embodiment, the third partition strip includes two bending portions connected at an included angle, first ends of the two bending portions are connected to each other, second ends of the two bending portions are closer to the drainage channel than the first ends, and the first partition strip and the second partition strip are connected to second ends of the two bending portions respectively.

In one embodiment, the cover body comprises a shielding portion and a liquid blocking strip, the shielding portion defines part of the boundary of the accommodating cavity and is provided with the closed surface, the liquid blocking strip is located in the accommodating cavity, the liquid separation assembly is attached to the liquid blocking strip, and a gap is formed between the liquid separation assembly and the shielding portion.

In one embodiment, the vent column protrudes relative to the abutment surface by a greater length than the liquid barrier.

In one embodiment, the cover further has a lateral surface and an outer surface, the outer surface is spaced from the sealing surface along the thickness direction of the cover, the lateral surface is connected between the sealing surface and the outer surface, and the lateral surface decreases in cross-sectional dimension along the direction from the sealing surface to the outer surface.

In one embodiment, the sealing surface is further provided with a mounting hole, the housing further includes a boss protruding from the abutting surface and engaged with the mounting hole, and the boss is connected to the cover body by a screw.

In one embodiment, the housing is an integrally formed housing.

One technical effect of one embodiment of the utility model is that: in view of the non-perpendicular setting of the central axis and the abutting surface of the ventilation column, and the relative abutting surface of the ventilation column extends towards the direction far away from the drainage groove, even if the liquid entering the accommodating cavity is gathered near the ventilation column, the liquid drops adhered to the ventilation column tend to be far away from the ventilation column, namely, the liquid flows downstream to the abutting surface from the ventilation column, the liquid on the ventilation column is prevented from further flowing into the ventilation hole and finally entering the closed cavity, and therefore the closed cavity is ensured to have a good liquid isolating function. Meanwhile, the external gas can enter the closed cavity through the drainage channel, the accommodating cavity and the vent hole in sequence, and the air pressure in the closed cavity is ensured to be always consistent with the external atmospheric pressure. And the arrangement of additional parts such as a sealing ring and the like is omitted, the defect that the liquid isolating effect is weakened due to the aging of the sealing ring is avoided, and the assembly efficiency of the whole sealing device is also improved. The ventilating column has a simple structure and relatively low manufacturing cost, and can effectively reduce the cost of the whole sealing device.

Drawings

Fig. 1 is a schematic perspective view of a sealing device according to an embodiment;

FIG. 2 is an exploded view of the sealing device of FIG. 1;

FIG. 3 is a schematic perspective cross-sectional view of the sealing device of FIG. 1 in a first direction;

FIG. 4 is a schematic perspective cross-sectional view of the sealing device of FIG. 1 in a second orientation;

FIG. 5 is a schematic plan sectional view corresponding to FIG. 4;

fig. 6 is a schematic perspective view of a cover of the sealing device shown in fig. 1.

Detailed Description

To facilitate an understanding of the utility model, the utility model will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "inner", "outer", "left", "right" and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Referring to fig. 1, fig. 2 and fig. 3, a sealing device 10 according to an embodiment of the present invention includes a housing 200 and a cover 100, the cover 100 is disposed on the housing 200, and the cover 100 is detachably connected to the housing 200, for example, the cover 100 may be connected to the housing 200 by screws, or the cover 100 may be connected to the housing 200 by snaps.

Referring to fig. 2, 3 and 6, in some embodiments, the cover 100 is provided with a receiving cavity 111, and the receiving cavity 111 may be an open cavity. The cover body 100 has a sealing surface 110, an outer surface 130 and a side circumferential surface 120, the sealing surface 110 and the outer surface 130 are spaced apart from each other in a thickness direction of the cover body 100, the sealing surface 110 and the outer surface 130 may be two surfaces in the thickness direction of the cover body 100, and the receiving cavity 111 may be formed by a portion of the sealing surface 110 being recessed toward the outer surface 130 by a set depth. The side circumferential surface 120 is a closed annular surface, and the side circumferential surface 120 is connected between the closed surface 110 and the outer surface 130 such that an upper end of the side circumferential surface 120 is disposed around the periphery of the outer surface 130 and a lower end of the side circumferential surface 120 is disposed around the periphery of the closed surface 110. In the direction from the closing surface 110 to the outer surface 130, the cross-sectional dimension of the side circumferential surface 120 is reduced, that is, the side circumferential surface 120 is disposed non-perpendicular to the abutting surface 210 and inclined at a certain angle to the abutting surface 210, so that the whole cover body 100 is substantially in a table-shaped structure, for example, the cover body 100 may be substantially in a frustum shape.

When the cover 100 is fixed on the housing 200, the sealing surface 110 of the cover 100 and the abutting surface 210 of the housing 200 have a reasonable abutting force to abut against each other, so as to improve the flow resistance of the liquid entering the accommodating cavity 111 from the gap between the sealing surface 110 and the abutting surface 210, thereby reducing the possibility of the external liquid flowing into the accommodating cavity 111, and finally improving the sealing performance of the cover 100. The closed surface 110 is concavely formed with a drainage groove 112, and the drainage groove 112 penetrates through the side circumferential surface 120, so that the drainage groove 112 simultaneously communicates with the accommodating cavity 111 and the outside, and the liquid in the accommodating cavity 111 can be discharged to the outside from the drainage groove 112.

In some embodiments, the cover body 100 includes a shielding portion 140 and a liquid blocking strip 150, the shielding portion 140 defines part of the boundary of the accommodating cavity 111, the non-recessed portion of the closing surface 110 and the side peripheral surface 120 are located on the shielding portion 140, the liquid blocking strip 150 is disposed in the accommodating cavity 111, and a gap with a certain width exists between the liquid blocking strip 150 and the shielding portion 140. The closing surface 110 is further opened with a mounting hole 113, and the mounting hole 113 is formed with a portion of the closing surface 110 depressed to a set depth toward the outer surface 130. The diameter of the mounting hole 113 gradually increases from the outer surface 130 toward the sealing surface 110. In other embodiments, the aperture of the mounting hole 113 may be constant from the outer surface 130 to the direction of the closing surface 110.

Referring to fig. 2, 3 and 4, in some embodiments, a closed cavity 250 is formed in the housing 200, and the housing 200 has an abutting surface 210, and the abutting surface 210 may be a plane. The housing 200 includes a vent column 220 and a liquid barrier assembly 230, and both the vent column 220 and the liquid barrier assembly 230 may be integrally connected with the abutting surface 210, for example, the entire housing 200 may be integrally formed by injection molding. One end of each of the vent column 220 and the liquid-blocking component 230 is fixed on the abutting surface 210, and the other end of each of the vent column 220 and the liquid-blocking component 230 protrudes a certain length relative to the abutting surface 210 along the thickness direction of the shell 200. in short, the vent column 220 and the liquid-blocking component 230 are protruded on the abutting surface 210. The venting post 220 protrudes a first length relative to the abutting surface 210, and the liquid-blocking member 230 protrudes a second length relative to the abutting surface 210, where the first length may be greater than the second length. I.e. the vent post 220 protrudes a greater length relative to the abutment surface 210 than the liquid barrier 230. When the cover 100 is fixed on the housing 200, the liquid-proof assembly 230 and the vent column 220 are both accommodated in the accommodating cavity 111 of the cover 100. The liquid isolating component 230 is enclosed to form an enclosed space 234, the air column 220 has an orthographic projection on the abutting surface 210, at least a part of the orthographic projection is located in the enclosed space 234, for example, all the orthographic projections can be located in the enclosed space 234.

In some embodiments, the vent columns 220 may be substantially cylindrical, but may also be prismatic, truncated-cone, or the like. The vent hole 221 is arranged in the vent column 220, the vent hole 221 is communicated with the closed cavity 250 and the accommodating cavity 111, and outside air can enter the closed cavity 250 through the drainage groove 112, the accommodating cavity 111 and the vent hole 221 in sequence, so that the air pressure in the closed cavity 250 is consistent with the outside atmospheric pressure, and explosion caused by overhigh air pressure in the closed cavity 250 is prevented. The central axis of the vent post 220 is disposed non-perpendicular to the contact surface 210, that is, the central axis of the vent post 220 is inclined at a certain angle α with respect to the contact surface 210, and the central axis of the vent post 220 is inclined with respect to the contact surface 210 in a direction away from the drain groove 112, in other words, the vent post 220 extends in a direction away from the drain groove 112 with respect to the contact surface 210. Specifically, the portion of the central axis of the vent post 220 located inside the vent post 220 is marked as a straight line segment, the straight line segment is not perpendicular to the abutting surface 210, the straight line segment has a first end and a second end which are opposite to each other, the first end is closer to the abutting surface 210 than the second end, and the first end is also closer to the drain groove 112 than the second end.

The central axis of the vent hole 221 may also be perpendicular to the abutting surface 210, so that the entire housing 200 is conveniently formed integrally by a mold, and the change of the mold is reduced as much as possible. The number of the vent holes 221 can be four, the aperture size of the vent holes 221 can be reasonably set, so that liquid cannot enter the vent holes 221 due to the action of surface tension, external liquid is prevented from entering the closed cavity 250 through the vent holes 221, the vent holes 221 are guaranteed to have good liquid blocking performance, and the closed cavity 250 is finally guaranteed to have a good waterproof and breathable function. In order to improve the air permeability of the closed cavity 250, the number of the vent holes 221 can be increased appropriately, and in order to improve the liquid resistance of the vent holes 221, the aperture of each vent hole 221 can be reduced reasonably.

Referring to fig. 2, 4 and 5, in some embodiments, the liquid separation assembly 230 includes a first partition strip 231, a second partition strip 232 and a third partition strip 233, and the first partition strip 231, the second partition strip 232 and the third partition strip 233 are connected together to form an approximate U-shaped structure. Both the first and second partition bars 231 and 232 may be linear, and the third partition bar 233 may be bent, and both the first and second partition bars 231 and 232 are closer to the drain groove 112 than the third partition bar 233. The first partition strip 231, the second partition strip 232 and the third partition strip 233, which are connected to each other, enclose the enclosure space 234. The first and second partition bars 231 and 232 are connected to one end of the third partition bar 233 and the second partition bar 232 is connected to the other end of the third partition bar 233, so that the first and second partition bars 231 and 232 are arranged in parallel to each other at intervals.

The third partition strip 233 having a bending shape includes two bending portions 233a, the two bending portions 233a are disposed at an included angle, the included angle formed between the two bending portions 233a may be an obtuse angle, and an opening of the obtuse angle is disposed toward the drainage groove 112, that is, the third partition strip 233 has a substantially V-shaped structure. Specifically, each of the bent portions 233a has first and second ends that are oppositely disposed, the first ends of the two bent portions 233a are connected to each other, the second ends of the two bent portions 233a are closer to the drain groove 112 than the first ends, and both the first and second blocking bars 231 and 232 are connected to the second ends of the two bent portions 233a, respectively. When the cover body 100 is installed on the housing 200, the shielding portion 140 of the cover body 100 has a gap with a certain width with the first partition strip 231, the second partition strip 232 and the third partition strip 233, and meanwhile, the liquid blocking strip 150 of the cover body 100 is tightly abutted with the first partition strip 231, the second partition strip 232 and the third partition strip 233, so that no gap exists between the liquid blocking strip 150 and the whole liquid blocking assembly 230.

In some embodiments, the housing 200 further comprises a boss 240, one end (fixed end) of the boss 240 is fixed on the abutting surface 210, and the other end (free end) of the boss 240 protrudes a certain height relative to the abutting surface 210, in short, the boss 240 protrudes relative to the abutting surface 210. The cross-sectional size of the boss 240 gradually decreases in a direction in which the fixed end of the boss 240 points to the free end, so that when the boss 240 is fitted into the mounting hole 113, resistance in the process of fitting the boss 240 into the mounting hole 113 can be eliminated, and the boss 240 can be ensured to be rapidly inserted into the mounting hole 113, thereby improving the assembly efficiency between the cover body 100 and the housing 200. Meanwhile, the boss 240 also plays a role in guiding and positioning to a certain extent, so that the assembly precision between the cover 100 and the housing 200 can be further improved. When the bosses 240 and the cover 100 are coupled by screws, a screw coupling relationship between the entire case 200 and the cover 100 can be achieved.

After the sealing device 10 is installed, the gravity direction of the sealing device 10 is the length extension direction of the first partition strip 231 and the second partition strip 232, so that the third partition strip 233 is located below the first partition strip 231 and the second partition strip 232, and the drainage groove 112 is located below the whole liquid separation assembly 230. As for a part of the liquid entering the accommodating chamber 111 from between the closing surface 110 and the abutting surface 210, under the action of its own gravity, the part of the liquid will flow along the gaps between the shielding part 140 and the first, second and third partition strips 231, 232 and 233 and finally flow out of the accommodating chamber 111 from the drainage groove 112. Since the orthographic projection of the vent post 220 on the abutting surface 210 is at least partially located in the enclosed space 234 surrounded by the liquid-blocking component 230, the liquid can be effectively prevented from gathering near the vent post 220 and diffusing into the vent hole 221 to enter the closed cavity 250. More importantly, the central axis of the vent post 220 is inclined relative to the abutting surface 210 in a direction away from the drainage channel 112, that is, the central axis of the vent post 220 is not perpendicular to the gravity direction of the liquid and has a certain inclination angle, even if the liquid entering the accommodating cavity 111 is gathered near the vent post 220, the liquid drops adhered to the vent post 220 have a tendency to flow away from the free end of the vent post 220, that is, the liquid flows from the vent post 220 to the abutting surface 210, so that the liquid on the vent post 220 is prevented from further flowing into the vent hole 221 and finally entering the closed cavity 250, and the closed cavity 250 is ensured to have a good liquid-blocking function. Meanwhile, the external air can enter the closed cavity 250 through the drainage channel 112, the accommodating cavity 111 and the vent hole 221 in sequence, so that the air pressure in the closed cavity 250 is always consistent with the external atmospheric pressure.

Further, the side peripheral surface 120 is not perpendicular to the abutting surface 210 and is inclined at a certain angle with respect to the abutting surface 210, so that on one hand, the liquid on the side peripheral surface 120 can more easily slide off the side peripheral surface 120, and the liquid attached to the side peripheral surface 120 for a long time is prevented from entering the accommodating cavity 111 through the gap between the abutting surface 210 and the closing surface 110. On the other hand, when the cover body 100 is formed by injection molding, the inclined side surface 120 makes the formed cover body 100 easier to be removed from the mold, thereby improving the processing efficiency and the forming quality of the cover body 100.

The cover body 100 and the shell body 200 are fixed only by screws, so that the arrangement of additional parts such as sealing rings is omitted, the defect that the waterproof effect is weakened due to aging of the sealing rings is avoided, and the assembly efficiency of the whole sealing device 10 is improved. Moreover, the liquid-proof assembly 230 and the vent column 220 with the vent hole 221 are both simple in structure and relatively low in manufacturing cost, and the cost of the whole sealing device 10 can be effectively reduced. The cover body 100 can also be suitable for different climatic environments, and the water drainage groove 112 is prevented from being blocked to influence the liquid insulation and ventilation functions of the closed cavity 250.

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 express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. A seal assembly, comprising:

the air vent structure comprises a shell, a first connecting piece and a second connecting piece, wherein the shell is provided with a closed cavity and is provided with a butting surface, the shell comprises an air vent column which is convexly arranged on the butting surface, and the air vent column is provided with an air vent communicated with the closed cavity; and

the cover body is provided with a closed surface which is abutted against the abutting surface, the closed surface is provided with an accommodating cavity and a drainage groove, the ventilation column is accommodated in the accommodating cavity, and the drainage groove is communicated with the accommodating cavity and the outside;

the central axis of the ventilation column is not perpendicular to the abutting surface, and the ventilation column is opposite to the abutting surface and extends towards the direction far away from the drainage groove.

2. The sealing device of claim 1, wherein a central axis of the vent is disposed perpendicular to the abutment surface.

3. The sealing device according to claim 1, further comprising a liquid barrier component protruding from the abutting surface and enclosing to form an enclosed space, wherein an orthographic projection of the liquid barrier component on the abutting surface is at least partially located in the enclosed space, and the liquid barrier component is accommodated in the accommodating cavity.

4. The sealing device of claim 3, wherein the liquid isolating assembly comprises a first partition strip, a second partition strip and a third partition strip, the first partition strip and the second partition strip are closer to the drainage channel than the third partition strip, and the first partition strip and the second partition strip are spaced apart and connected to two ends of the third partition strip respectively.

5. The sealing device of claim 4, wherein the third partition strip comprises two bent portions connected at an included angle, first ends of the two bent portions are connected to each other, second ends of the two bent portions are closer to the drainage groove than the first ends, and the first partition strip and the second partition strip are connected to second ends of the two bent portions respectively.

6. The sealing device of claim 3, wherein the cover body comprises a shielding portion and a liquid blocking strip, the shielding portion defines part of the boundary of the accommodating cavity and has the sealing surface, the liquid blocking strip is located in the accommodating cavity, the liquid isolating assembly is attached to the liquid blocking strip, and a gap is formed between the liquid isolating assembly and the shielding portion.

7. The sealing device of claim 3, wherein the vent post projects a greater length relative to the abutment surface than the liquid barrier assembly.

8. The sealing device of claim 1, wherein the cover further has a lateral perimeter surface and an outer surface, the outer surface being spaced from the closure surface in a thickness direction of the cover, the lateral perimeter surface being connected between the closure surface and the outer surface, the lateral perimeter surface decreasing in cross-sectional dimension in a direction from the closure surface toward the outer surface.

9. The sealing device according to claim 1, wherein the sealing surface is further provided with a mounting hole, the housing further comprises a boss protruding from the abutting surface and engaged with the mounting hole, and the boss is connected with the cover body by a screw.

10. The sealing device of claim 1, wherein the housing is an integrally formed housing.

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