CN221054131U - Sealing device - Google Patents

Abstract

The application belongs to the technical field of sealing, and particularly provides a sealing device which comprises a first shell, a second shell, a threaded fastener and a sealing ring, wherein the first shell is provided with a mounting groove and a first connecting hole, the first connecting hole is communicated with the bottom of the mounting groove, the second shell is provided with a second connecting hole communicated with the first connecting hole, the threaded fastener sequentially penetrates through the mounting groove and the first connecting hole and then is in threaded connection with the second connecting hole, the sealing ring is arranged in the mounting groove, the sealing ring is provided with an inner side surface and an outer side surface which are oppositely arranged, the inner side surface is in butt joint with the peripheral side surface of the threaded fastener, and the outer side surface is in butt joint with the peripheral side wall of the mounting groove. The sealing is realized by applying force on the direction perpendicular to the axial direction to the sealing ring, the axial pressure is not required to be applied to the sealing ring additionally, and the sealing ring is prevented from being deformed easily due to bearing the larger axial pressure, so that the service life of the sealing ring is greatly prolonged.

Description

Sealing device

Technical Field

The application belongs to the technical field of sealing, and particularly relates to a sealing device.

Background

When carrying out the waterproofing to the screwed connection department of product casing, generally set up the sealing washer in screwed connection department, exert axial pressure with the sealing washer through the screw and compress tightly the sealing washer on the casing to play waterproof effect. However, the seal ring is easily deformed due to the large axial pressure, and the service life is short.

Disclosure of utility model

The application aims to provide a sealing device, which aims to solve the technical problems that a sealing ring is easy to deform when bearing larger axial pressure in the prior art and has short service life.

In order to achieve the above purpose, the application adopts the following technical scheme: the utility model provides a sealing device, including first casing, the second casing, screw thread fastener and sealing washer, first casing is equipped with mounting groove and first connecting hole, first connecting hole intercommunication is in the bottom of mounting groove, the second casing is equipped with the second connecting hole with first connecting hole intercommunication, screw thread fastener passes behind mounting groove and the first connecting hole in proper order with second connecting hole threaded connection, the sealing washer setting is in the mounting groove, the sealing washer has medial surface and the lateral surface of relative setting, medial surface and screw thread fastener's week side butt, lateral surface and the week lateral wall butt of mounting groove.

Further, the threaded fastener comprises a head and a rod part, the head is positioned outside the mounting groove and is abutted to one side of the first shell, which is opposite to the second shell, the rod part sequentially passes through the mounting groove and the first connecting hole and then is in threaded connection with the second connecting hole, the original thickness of the sealing ring is smaller than the depth of the mounting groove, and the inner side surface is abutted to the peripheral side surface of the rod part.

Further, the sealing device also comprises a flat gasket sleeved on the rod part, wherein the flat gasket is positioned outside the mounting groove and is arranged between the head part and the first shell.

Further, the sealing device also comprises a spring washer sleeved on the rod part, and the spring washer is arranged between the head part and the flat washer.

Further, one side of the first shell back to the second shell is provided with a storage groove, the mounting groove is arranged at the bottom of the storage groove, and the head is used for being stored in the storage groove and is abutted to the bottom of the storage groove.

Further, the rod portion comprises a smooth section and a threaded section, the smooth section is located between the threaded section and the head portion, the inner side face is in butt joint with the peripheral side face of the smooth section, and the threaded section is in threaded connection with the second connecting hole.

Further, the sealing ring is in a circular ring shape, the peripheral side wall of the mounting groove is a cylindrical surface, and the peripheral side surface of the smooth section is a cylindrical surface.

Further, one side of the sealing ring, which is close to the first connecting hole, is abutted with the bottom of the mounting groove.

Further, the original inner diameter of the sealing ring is smaller than the outer diameter of the smooth section, and the original outer diameter of the sealing ring is larger than the diameter of the mounting groove.

Further, the cross section of the sealing ring is circular

Compared with the prior art, the sealing device provided by the application has the beneficial effects that: when the first shell and the second shell are connected, the threaded fastener sequentially passes through the mounting groove and the first connecting hole of the first shell and then is in threaded connection with the second connecting hole of the second shell, the sealing ring is arranged in the mounting groove, the circumferential side surface of the threaded fastener and the circumferential side wall of the mounting groove apply force perpendicular to the axial direction to the sealing ring, the inner side surface and the outer side surface of the sealing ring are respectively abutted with the circumferential side surface of the threaded fastener and the circumferential side wall of the mounting groove, so that external liquid is prevented from flowing into the first connecting hole, the second connecting hole and the first shell and the second shell from between the sealing ring and the circumferential side wall of the mounting groove, the sealing ring is prevented from being deformed easily due to bearing larger axial pressure, and the service life of the sealing ring is greatly prolonged.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments or the description of the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a cross-sectional view of a seal provided by an embodiment of the present application;

FIG. 2 is a schematic view of the first and second housings of the sealing device shown in FIG. 1;

fig. 3 is a schematic structural view of a seal ring of the sealing device shown in fig. 1.

Wherein, each reference sign in the figure:

10. A first housing; 11. a mounting groove; 12. a first connection hole; 13. a storage groove; 20. a second housing; 21. a second connection hole; 30. a threaded fastener; 31. a head; 32. a stem portion; 321. a smooth section; 322. a threaded section; 40. a seal ring; 41. an inner side surface; 42. an outer side surface; 50. a flat gasket; 60. and a spring washer.

Detailed Description

Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present application and should not be construed as limiting the application.

In the description of the present application, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

Referring to fig. 1 to 3 together, the embodiment of the application provides a sealing device, which comprises a first housing 10, a second housing 20, a threaded fastener 30 and a sealing ring 40, wherein the first housing 10 is provided with a mounting groove 11 and a first connecting hole 12, the first connecting hole 12 is communicated with the bottom of the mounting groove 11, the second housing 20 is provided with a second connecting hole 21 communicated with the first connecting hole 12, the threaded fastener 30 sequentially passes through the mounting groove 11 and the first connecting hole 12 and then is in threaded connection with the second connecting hole 21, the sealing ring 40 is arranged in the mounting groove 11, the sealing ring 40 is provided with an inner side 41 and an outer side 42 which are oppositely arranged, the inner side 41 is in butt joint with the peripheral side of the threaded fastener 30, and the outer side 42 is in butt joint with the peripheral side wall of the mounting groove 11.

When the first casing 10 and the second casing 20 are connected, the threaded fastener 30 sequentially passes through the mounting groove 11 and the first connecting hole 12 of the first casing 10 and then is connected with the second connecting hole 21 of the second casing 20 in a threaded manner, and the sealing ring 40 is arranged in the mounting groove 11, and the circumferential side surface of the threaded fastener 30 and the circumferential side wall of the mounting groove 11 apply a force perpendicular to the axial direction to the sealing ring 40, so that the inner side surface 41 and the outer side surface 42 of the sealing ring 40 are respectively abutted with the circumferential side surface of the threaded fastener 30 and the circumferential side wall of the mounting groove 11, thereby preventing external liquid from flowing into the first connecting hole 12, the second connecting hole 21 and the first casing 10 and the second casing 20 from between the sealing ring 40 and the circumferential side wall of the mounting groove 11, avoiding that the sealing ring 40 is easily deformed due to bearing a large axial pressure, and greatly improving the service life of the sealing ring 40.

Specifically, the sealing device provided in the embodiment of the application may be applied to an electronic product, where the first casing 10 and the second casing 20 enclose together to form an inner cavity, and electronic components are installed in the inner cavity, and by making the inner side 41 and the outer side 42 of the sealing ring 40 respectively abut against the peripheral side of the threaded fastener 30 and the peripheral side wall of the mounting groove 11, external liquid can be prevented from flowing into the first connecting hole 12, that is, external liquid can be prevented from flowing into the inner cavity from between the first casing 10 and the second casing 20, and normal operation of the electronic components in the inner cavity is ensured.

Further, as shown in fig. 1 and 2, the side of the seal ring 40 near the first connecting hole 12 abuts against the bottom of the mounting groove 11. In the mounting, the seal ring 40 is pushed to the bottom of the mounting groove 11, and the side of the seal ring 40 close to the first connecting hole 12 is brought into contact with the bottom of the mounting groove 11, and the inner side surface 41 and the outer side surface 42 of the seal ring 40 are brought into contact with the peripheral side surface of the screw fastener 30 and the peripheral side wall of the mounting groove 11, respectively, so that the peripheral side surface of the screw fastener 30 and the peripheral side wall of the mounting groove 11 can provide a static friction force in the axial direction to the seal ring 40, and the seal ring 40 can be maintained at the bottom of the mounting groove 11. The sealing ring 40 is abutted against the bottom of the mounting groove 11 on the side facing the first connection hole 12, so that the waterproof effect of the sealing device can be further enhanced, and even if the external liquid can flow from between the outer side surface 42 of the sealing ring 40 and the peripheral side wall of the mounting groove 11 to the bottom of the mounting groove 11, the sealing ring 40 is abutted against the bottom of the mounting groove 11, so that the liquid can be effectively prevented from further flowing into the first connection hole 12, the second connection hole 21, and the first casing 10 and the second casing 20 from between the sealing ring 40 and the bottom of the mounting groove 11.

Further, as shown in fig. 1 and 2, the threaded fastener 30 includes a head 31 and a rod 32, the head 31 is located outside the mounting groove 11 and abuts against a side of the first housing 10 facing away from the second housing 20, the rod 32 sequentially passes through the mounting groove 11 and the first connecting hole 12 and then is in threaded connection with the second connecting hole 21, the original thickness of the seal ring 40 is smaller than the depth of the mounting groove 11, and the inner side surface 41 of the seal ring 40 abuts against the peripheral side surface of the rod 32. Specifically, the size of the head 31 is larger than the size of the opening of the mounting groove 11, so that the head 31 can abut on the side of the first housing 10 facing away from the second housing 20 without entering into the mounting groove 11, and the mating rod portion 32 is screwed with the second connection hole 21, thereby achieving the fixed connection of the first housing 10 and the second housing 20. The original thickness of the seal ring 40 is the thickness of the seal ring 40 in a state of not receiving an external force, and since the original thickness of the seal ring 40 is smaller than the depth of the mounting groove 11, the seal ring 40 can be prevented from being exposed to the outside of the mounting groove 11, and thus the seal ring 40 can be prevented from being subjected to the axial pressure applied by the head 31. It is worth mentioning that current sealing device establishes the sealing ring cover on the pole portion of screw, exerts axial pressure to the sealing washer through the head of screw to compress tightly the sealing washer on the casing, when the installation, the sealing washer is pressed and can outwards be expanded, thereby shifts to on the head of screw from the pole portion of screw easily, installs very inconveniently. In the sealing device provided by the embodiment of the application, the circumferential side surface of the rod portion 32 and the circumferential side wall of the mounting groove 11 apply a force to the sealing ring 40 in the direction perpendicular to the axial direction, so that the inner side surface 41 and the outer side surface 42 of the sealing ring 40 respectively abut against the circumferential side surface of the rod portion 32 and the circumferential side wall of the mounting groove 11, the sealing ring 40 is not stressed in the axial direction, and is not outwards expanded, the situation that the sealing ring 40 is transferred from the rod portion 32 to the head portion 31 is avoided, and the mounting is very convenient.

Further, as shown in fig. 1 and 2, the sealing device further includes a flat gasket 50 sleeved on the rod portion 32, and the flat gasket 50 is located outside the mounting groove 11 and is disposed between the first housing 10 and the head portion 31. Specifically, the outer diameter of the flat washer 50 is larger than the size of the opening of the mounting groove 11, so that the flat washer 50 can abut on the side of the first housing 10 facing away from the second housing 20 without entering into the mounting groove 11, while the inner diameter of the flat washer 50 is smaller than the size of the head 31, so that the head 31 can abut on the flat washer 50 without passing through the flat washer 50. By providing the flat washer 50, the contact area between the threaded fastener 30 and the first housing 10 can be increased, and the pressure can be dispersed, thereby protecting the outer surface of the first housing 10. It should be noted that, in the existing sealing device, axial pressure is applied to the sealing ring by the head of the screw to compress the sealing ring on the housing, the head of the screw needs to be in direct contact with the sealing ring to ensure waterproof effect, a flat gasket cannot be arranged between the head of the screw and the sealing ring, if the flat gasket is arranged between the head of the screw and the sealing ring, external liquid may flow into the screw hole from a gap between the head of the screw and the sealing ring, so that waterproof failure is caused. In the sealing device provided by the embodiment of the application, the circumferential side surface of the rod portion 32 and the circumferential side wall of the mounting groove 11 apply a force to the sealing ring 40 in the direction perpendicular to the axial direction, so that the inner side surface 41 and the outer side surface 42 of the sealing ring 40 are respectively abutted against the circumferential side surface of the rod portion 32 and the circumferential side wall of the mounting groove 11, even if an external liquid can flow onto the circumferential side surface of the rod portion 32 through the gap between the head portion 31 and the flat gasket 50, the inner side surface 41 of the sealing ring 40 is abutted against the circumferential side surface of the rod portion 32, and thus the liquid can be effectively prevented from further flowing into the first connecting hole 12, the second connecting hole 21 and the first casing 10 and the second casing 20 from between the sealing ring 40 and the circumferential side surface of the rod portion 32, and the waterproof effect is ensured.

Further, as shown in connection with fig. 1 and 2, the sealing device further comprises a spring washer 60 fitted over the stem 32, the spring washer 60 being disposed between the head 31 and the flat washer 50. By providing the spring washer 60 between the head 31 and the flat washer 50, the shock resistance of the sealing device can be enhanced, effectively preventing the threaded fastener 30 from loosening. It should be noted that, in the existing sealing device, axial pressure is applied to the sealing ring by the head of the screw to compress the sealing ring on the shell, the head of the screw needs to be in direct contact with the sealing ring to ensure waterproof effect, due to the lack of the spring washer, the shock resistance is poor, the screw is easy to loosen, and if the spring washer is arranged between the head of the screw and the sealing ring, external liquid flows into the screw hole from a gap between the head of the screw and the spring washer, so that waterproof failure is caused. In the sealing device provided by the embodiment of the application, the circumferential side surface of the rod portion 32 and the circumferential side wall of the mounting groove 11 apply a force to the sealing ring 40 in the direction perpendicular to the axial direction, so that the inner side surface 41 and the outer side surface 42 of the sealing ring 40 are respectively abutted against the circumferential side surface of the rod portion 32 and the circumferential side wall of the mounting groove 11, even if an external liquid can flow onto the circumferential side surface of the rod portion 32 through the gap between the head portion 31 and the spring washer 60 and the gap between the spring washer 60 and the flat washer 50, the inner side surface 41 of the sealing ring 40 is abutted against the circumferential side surface of the rod portion 32, and thus the liquid can be effectively prevented from further flowing into the first connecting hole 12, the second connecting hole 21 and the first casing 10 and the second casing 20 from between the sealing ring 40 and the circumferential side surface of the rod portion 32, thereby ensuring the waterproof effect.

Further, as shown in fig. 1 and 2, the stem portion 32 includes a smooth section 321 and a threaded section 322, the smooth section 321 being located between the threaded section 322 and the head portion 31, the inner side surface 41 abutting against the peripheral side surface of the smooth section 321, the threaded section 322 being threadedly coupled to the second coupling hole 21. It should be noted that, the threaded section 322 refers to a portion of the threaded fastener 30 having external threads, and can be engaged with the internal threads of the second connecting hole 21, and the smooth section 321 refers to a portion of the threaded fastener 30 having no threads and having a flat and smooth surface, and can be tightly attached to the inner side 41 of the sealing ring 40, so as to enhance the waterproof effect.

Further, the sealing ring 40 is in a ring shape, the circumferential side wall of the mounting groove 11 is a cylindrical surface, and the circumferential side surface of the smooth section 321 is a cylindrical surface. The sealing ring 40 is in a circular ring shape, namely, the outer side face 42 and the inner side face 41 of the sealing ring 40 are cylindrical surfaces, the peripheral side face of the mounting groove 11 is also a cylindrical surface, so that the sealing ring can be tightly attached to the outer side face 42 of the sealing ring 40 to enhance the waterproof effect, and the peripheral side face of the smooth section 321 is also a cylindrical surface, so that the sealing ring can be tightly attached to the inner side face 41 of the sealing ring 40 to enhance the waterproof effect. Specifically, the sealing device provided by the embodiment of the application can laterally squeeze the sealing ring 40 by 25%, and can prevent water through the IPX6 level.

Further, the original inner diameter of the seal ring 40 is smaller than the outer diameter of the smooth section 321, and the original outer diameter of the seal ring 40 is larger than the diameter of the installation groove 11. The original inner diameter of the seal ring 40 is the inner diameter of the seal ring 40 in a state of not receiving an external force, and the original outer diameter of the seal ring 40 is the outer diameter of the seal ring 40 in a state of not receiving an external force. Because the original inner diameter of the sealing ring 40 is smaller than the outer diameter of the smooth section 321, the original outer diameter of the sealing ring 40 is larger than the diameter of the mounting groove 11, and therefore the assembled sealing ring 40 is in a radially compressed state, so that the inner side surface 41 of the sealing ring 40 is tightly attached to the peripheral side surface of the smooth section 321, the outer side surface 42 of the sealing ring 40 is tightly attached to the peripheral side wall of the mounting groove 11, and the waterproof effect is further ensured.

Further, the cross section of the sealing ring 40 is circular, i.e. the sealing ring 40 is an O-ring, and has the advantages of good sealing performance, good durability, simple structure, convenient disassembly and assembly, etc.

Further, as shown in fig. 1 and 2, a receiving groove 13 is further provided on a side of the first housing 10 facing away from the second housing 20, the mounting groove 11 is provided at a bottom of the receiving groove 13, and the head 31 is received in the receiving groove 13 and abuts against the bottom of the receiving groove 13. By providing the receiving groove 13 in the first housing 10, the head 31 of the screw fastener 30 is received in the receiving groove 13 without being exposed, thereby protecting the screw fastener 30 and improving the beauty of the sealing device. Specifically, the flat washer 50 and the spring washer 60 are both disposed in the housing groove 13, one side of the flat washer 50 abuts against the bottom of the housing groove 13, the other side of the flat washer 50 abuts against one side of the spring washer 60, and one side of the spring washer 60 facing away from the spring washer 60 abuts against the head 31.

The foregoing description of the preferred embodiments of the application is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the application.

Claims (10)

1. The utility model provides a sealing device, its characterized in that, includes first casing, second casing, screw thread fastener and sealing washer, first casing is equipped with mounting groove and first connecting hole, first connecting hole communicate in the bottom of mounting groove, the second casing be equipped with the second connecting hole of first connecting hole intercommunication, screw thread fastener pass in proper order the mounting groove with behind the first connecting hole with second connecting hole threaded connection, the sealing washer sets up in the mounting groove, the sealing washer has medial surface and the lateral surface of relative setting, the medial surface with screw thread fastener's week side butt, the lateral surface with the week lateral wall butt of mounting groove.

2. The sealing device of claim 1, wherein: the threaded fastener comprises a head and a rod, wherein the head is positioned outside the mounting groove and is abutted to one side of the first shell, which is opposite to the second shell, the rod sequentially penetrates through the mounting groove and the first connecting hole and then is in threaded connection with the second connecting hole, the original thickness of the sealing ring is smaller than the depth of the mounting groove, and the inner side surface is abutted to the peripheral side surface of the rod.

3. The sealing device of claim 2, wherein: the sealing device further comprises a flat gasket sleeved on the rod part, wherein the flat gasket is positioned outside the mounting groove and is arranged between the first shell and the head part.

4. A sealing device according to claim 3, wherein: the sealing device further comprises a spring washer sleeved on the rod part, and the spring washer is arranged between the head part and the flat washer.

5. The sealing device of claim 2, wherein: one side of the first shell, which is opposite to the second shell, is provided with a storage groove, the mounting groove is arranged at the bottom of the storage groove, and the head is stored in the storage groove and is abutted to the bottom of the storage groove.

6. The sealing device of claim 2, wherein: the rod part comprises a smooth section and a threaded section, the smooth section is located between the threaded section and the head part, the inner side face is abutted to the peripheral side face of the smooth section, and the threaded section is in threaded connection with the second connecting hole.

7. The sealing device of claim 6, wherein: the sealing ring is circular, the circumferential side wall of the mounting groove is a cylindrical surface, and the circumferential side surface of the smooth section is a cylindrical surface.

8. The sealing device of claim 7, wherein: the original inner diameter of the sealing ring is smaller than the outer diameter of the smooth section, and the original outer diameter of the sealing ring is larger than the diameter of the mounting groove.

9. The sealing device of claim 7, wherein: the cross section of the sealing ring is circular.

10. The sealing device of claim 1, wherein: one side of the sealing ring, which is close to the first connecting hole, is abutted with the bottom of the mounting groove.