CN216447284U - Sealing device for fastening inner hexagonal socket head cap screw - Google Patents
Sealing device for fastening inner hexagonal socket head cap screw Download PDFInfo
- Publication number
- CN216447284U CN216447284U CN202122517639.5U CN202122517639U CN216447284U CN 216447284 U CN216447284 U CN 216447284U CN 202122517639 U CN202122517639 U CN 202122517639U CN 216447284 U CN216447284 U CN 216447284U
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- screw
- screw rod
- flat gasket
- sleeve
- head
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- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
Abstract
The utility model provides a sealing device for fastening an inner hexagonal socket head cap screw, which is characterized in that: it comprises a screw, a sealing gasket and a screw head sleeve; the screw sealing gasket consists of a flat gasket and a cylindrical screw rod sleeve, the screw rod sleeve is inserted into an inner hole of the flat gasket into a whole in a cylindrical manner, and the circle center of the flat gasket is on the axis of the cylinder; the screw head sleeve is coated on the side surface and the lower surface of the screw head and comprises an annular radial boss coated on the lower surface of the screw head, and the lower surface of the annular radial boss and the screw head sleeve form a concave spigot; the screw rod sleeve is sleeved on the screw rod, the flat gasket is installed on the concave spigot as the convex spigot, and the screw rod sleeve above the flat gasket is inserted between the annular radial boss and the screw rod to simultaneously realize radial sealing and axial sealing on the threaded hole.
Description
Technical Field
The utility model relates to a fastening screw sealing device, in particular to a fastening screw sealing device used on a fuel tank cover.
Background
Fuel tanks are very common in use, and the most basic requirement is the inability to leak fuel, i.e., the tightness, particularly of the tank cover. The box cover is installed on the box body generally by using hexagon socket head cap head screws and sealing gaskets thereof such as flat gaskets, the screws comprise screw heads and screw rods, correspondingly, the box cover and the box body are provided with threaded through holes matched with the screws, and the flat gaskets are sleeved on the screw rods and installed between the screw heads and the box cover to seal between the threaded through holes and the screw rods. The flat gasket can radially deform and shift after being extruded by a screw, and a round hole of the flat gasket can deviate from a screw rod and a threaded through hole, so that the sealing failure of a screw pair between the threaded through hole and the screw rod is caused, namely the oil leakage of the box cover is mostly caused by the sealing failure of the screw pair between the threaded through hole and the screw rod. Oil leakage from fuel tanks has been a problem that the art is desirous of solving.
Disclosure of Invention
In order to solve the technical problems, the utility model aims to provide a sealing device for fastening a socket head cap screw.
The purpose of the utility model is realized as follows: it includes screw and sealed pad, and the screw comprises screwhead and screw pole, characterized by: it also includes screw head cover; the screw sealing gasket is composed of a flat gasket and a cylindrical screw rod sleeve, the screw rod sleeve is inserted into an inner hole of the flat gasket in a cylindrical manner, the screw rod sleeve and the flat gasket are integrated at the joint of the flat gasket and the screw rod sleeve, and the circle center of the flat gasket is positioned on the axis of the cylinder; the screw head sleeve is coated on the side surface and the lower surface of the screw head and comprises an annular radial boss coated on the lower surface of the screw head, and the lower surface of the annular radial boss and the screw head sleeve form a concave spigot; the screw sealing gasket is arranged on the screw in a mode that a screw rod is sleeved on the screw rod, a flat gasket is arranged on a concave spigot as a convex spigot, and the screw rod sleeve above the flat gasket is inserted between the annular radial boss and the screw rod.
Compared with the prior art, the utility model has the following positive effects: the assembled screws of the utility model are inserted into the fastening threaded holes of the box cover and the box body, wherein the flat gasket of the screw sealing gasket is positioned between the box cover and the boss, and the screw rod sleeve below the flat gasket enters the fastening threaded holes along with the screw rod. When the screw is screwed down, the flat gasket tends to deform and shift in the radial direction after being extruded downwards by the screw head and the lug boss, but is positioned in the radial direction by the concave spigot without deforming and moving in the radial direction, so that the flat gasket does not deviate from the threaded hole and seals the threaded hole in the radial direction; meanwhile, the screw rod sleeve is extruded and then axially seals the threaded hole. The problem of oil leakage of the oil tank is fundamentally solved.
Drawings
The utility model is further described below with reference to the accompanying drawings.
Figure 1 is a schematic view of the use of the utility model on a fuel tank.
Fig. 2 is an enlarged view of a portion a of fig. 1.
Detailed Description
The screw comprises a polytetrafluoroethylene screw and a sealing gasket thereof, wherein the screw consists of a screw head 21 and a screw rod 22, and further comprises a screw head sleeve 1; the screw sealing gasket is composed of a flat gasket 31 and a cylindrical screw rod sleeve 32, the screw rod sleeve is inserted into an inner hole of the flat gasket in a cylindrical manner, the combination part of the screw rod sleeve and the flat gasket is integrated, and the circle center of the flat gasket is positioned on the axis of the cylindrical body; the screw head sleeve is coated on the side surface and the lower surface of the screw head and comprises an annular radial boss 11 coated on the lower surface of the screw head, and the lower surface of the annular radial boss and the screw head sleeve form a concave spigot; the screw gasket is mounted on the screw in such a manner that a screw rod sleeve 32 is sleeved on the screw rod 22, a flat washer 31 is mounted on the concave spigot as a convex spigot, and the screw rod sleeve above the flat washer is inserted between the annular radial boss and the screw rod. The thickness of the flat gasket 31 is 0.2-0.3 mm greater than the depth of the female spigot (considering the depth according to about 5% deformation of the material).
The assembled screws of the utility model are inserted into the fastening threaded holes of the box cover 4 and the box body 5, wherein the flat gasket of the screw sealing gasket is positioned between the box cover and the lug boss, and the screw rod sleeve below the flat gasket enters the fastening threaded holes along with the screw rod. When the screw is screwed down, the flat gasket tends to deform and shift in the radial direction after being extruded downwards by the screw head and the lug boss, but is positioned in the radial direction by the concave spigot without deforming and moving in the radial direction, so that the flat gasket does not deviate from the threaded hole and seals the threaded hole in the radial direction; meanwhile, the screw rod sleeve is extruded and then axially seals the threaded hole. The problem of oil leakage of the oil tank is fundamentally solved.
Claims (2)
1. The utility model provides a fastening hexagon socket head cap screw sealing device, it includes screw and sealed the pad, and the screw comprises screw head and screw pole, characterized by: it also includes screw head cover; the screw sealing gasket is composed of a flat gasket and a cylindrical screw rod sleeve, the screw rod sleeve is inserted into an inner hole of the flat gasket in a cylindrical manner, the screw rod sleeve and the flat gasket are integrated at the joint of the flat gasket and the screw rod sleeve, and the circle center of the flat gasket is positioned on the axis of the cylinder; the screw head sleeve is coated on the side surface and the lower surface of the screw head and comprises an annular radial boss coated on the lower surface of the screw head, and the lower surface of the annular radial boss and the screw head sleeve form a concave spigot; the screw rod sleeve is sleeved on the screw rod, the flat gasket is arranged on the concave spigot as the convex spigot, and the screw rod sleeve above the flat gasket is inserted between the annular radial boss and the screw rod.
2. The tightening socket head cap screw sealing device according to claim 1, wherein: the thickness of the flat gasket is 0.2-0.3 mm greater than the depth of the concave spigot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122517639.5U CN216447284U (en) | 2021-10-20 | 2021-10-20 | Sealing device for fastening inner hexagonal socket head cap screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122517639.5U CN216447284U (en) | 2021-10-20 | 2021-10-20 | Sealing device for fastening inner hexagonal socket head cap screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216447284U true CN216447284U (en) | 2022-05-06 |
Family
ID=81349835
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122517639.5U Active CN216447284U (en) | 2021-10-20 | 2021-10-20 | Sealing device for fastening inner hexagonal socket head cap screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216447284U (en) |
-
2021
- 2021-10-20 CN CN202122517639.5U patent/CN216447284U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: SHENYANG NAISI CONTROL TECHNOLOGY CO.,LTD. Assignor: SHENYANG NORTHEAST ELECTRIC POWER CONTROL Co.,Ltd. Contract record no.: X2023210000146 Denomination of utility model: Sealing device for tightening hexagon socket head cap screws Granted publication date: 20220506 License type: Common License Record date: 20230927 |