CN210600158U - Cylinder head cover nut assembly - Google Patents
Cylinder head cover nut assembly Download PDFInfo
- Publication number
- CN210600158U CN210600158U CN201921524612.5U CN201921524612U CN210600158U CN 210600158 U CN210600158 U CN 210600158U CN 201921524612 U CN201921524612 U CN 201921524612U CN 210600158 U CN210600158 U CN 210600158U
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- CN
- China
- Prior art keywords
- sealing
- cylinder head
- head cover
- sealing body
- nut assembly
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
The utility model provides a cylinder head cover nut sub-assembly belongs to machinery. This cylinder head cover nut sub-assembly includes the bolt, and the one end of bolt is the head, and the other end is the screw rod, and the screw rod top is threaded, and the cover is equipped with gasket and sealing member on the screw rod, and the sealing member is including continuous first seal and second seal, and the external diameter of second seal is less than first seal, and the thickness of first seal is 1mm at least, has first sealed face on the first seal, and the inner hole wall of first seal and second seal is the sealed face of second. The sealing ring is improved in the cylinder head cover nut assembly, and the problems of poor sealing performance, oil leakage and the like of the conventional assembly are solved.
Description
Technical Field
The utility model belongs to the field of machinery, a cylinder head cover nut sub-assembly is related to.
Background
The cylinder head cover nut assembly realizes the sealing of a cylinder head cover, the cylinder head cover nut assembly generally comprises a bolt, a gasket and a sealing ring, the bolt is in threaded connection with a stud in the cylinder head cover, the sealing is realized through the sealing ring after the threaded connection, the cylinder head cover nut assembly is a more traditional cylinder head cover nut assembly structure, the sealing function of the nut assembly is realized by an O-shaped sealing ring, and certain problems exist in practice, namely, the pressure in a cylinder head is overlarge, the sealing performance of the O-shaped sealing ring is insufficient, the sealing ring is frequently damaged by washing and oil leakage occurs, so that the existing cylinder head cover nut assembly is necessary to be innovated and improved.
Disclosure of Invention
The utility model aims at the above-mentioned problem that exists among the prior art, provide the cylinder head cover nut sub-assembly, improved the sealing washer in this cylinder head cover nut sub-assembly, solved current poor oil leakage scheduling problem to the subassembly leakproofness.
The purpose of the utility model can be realized by the following technical proposal: the cylinder head cover nut assembly comprises a bolt, one end of the bolt is a head, the other end of the bolt is a screw rod, the top of the screw rod is threaded, a gasket and a sealing piece are sleeved on the screw rod, the cylinder head cover nut assembly is characterized in that the sealing piece comprises a first sealing body and a second sealing body which are connected, the outer diameter of the second sealing body is smaller than that of the first sealing body, the thickness of the first sealing body is at least 1mm, a first sealing surface is arranged on the first sealing body, and the inner hole wall of the first sealing body and the inner hole wall of the second sealing body are second sealing surfaces.
The cylinder head cover nut assembly is connected with the cylinder head cover, when a stud on the cylinder head cover is locked with a screw thread of the nut assembly, the steel head cover is in contact with the first sealing surface, the first sealing surface is extruded, the first sealing surface is deformed, the second sealing surface is sealed with the screw rod in a fitting mode, the sealing stroke is prolonged, a good sealing effect is achieved, oil leakage is prevented, and therefore the cylinder head cover directly extrudes the sealing ring differently from the cylinder head cover in the prior art, and a double sealing effect is formed through the first sealing surface and the second sealing surface. The thickness of the first sealing body is at least 1mm, and when the thickness of the first sealing body is less than 1mm, the cylinder head cover extrudes the first sealing body, and oil leakage, burst of the first sealing body and the like can occur. A washer is positioned between the bolt head and the seal and functions to prevent radial expansion of the seal and rupture.
In the cylinder head cover nut assembly, the inner holes of the first sealing body and the second sealing body are coaxially arranged, and the first sealing body and the second sealing body are of a T-shaped structure overall.
The first sealing body and the second sealing body are of an integrated structure.
In the cylinder head cover nut assembly, at least one first sealing convex edge is arranged on the inner wall of at least one of the first sealing body and the second sealing body.
The position of the first sealing flange has three conditions: when the first sealing convex edge is positioned on the first sealing body, the stud of the cylinder head cover is locked, the connecting part of the cylinder head cover extrudes the first sealing body, the sealing body deforms, and the first sealing convex edge deforms accordingly, so that the sealing performance of the nut assembly of the cylinder head cover is enhanced. When the first sealing convex edge is positioned on the second sealing body, the cylinder head cover stud is locked, the cylinder head cover connecting part extrudes the second sealing body, the second sealing body and the second sealing surface deform, and the first sealing convex edge deforms accordingly, so that the sealing performance of the cylinder head cover nut assembly is enhanced. When the first sealing convex edge is located on the first sealing body and the second sealing body at the same time, the cylinder head cover stud is locked, the first sealing body is extruded at the bottom of the cylinder head cover connecting part, the second sealing body is extruded on the inner wall of the cylinder head cover connecting part, and the first sealing body and the second sealing body are deformed, so that the first sealing convex edge is also deformed, and the sealing performance of the cylinder head cover nut assembly is enhanced.
In the cylinder head cover nut assembly, a groove is formed in the top surface of the first sealing body, and the bottom surface of the groove is the first sealing surface.
In this solution, the first sealing surface is the bottom surface of the groove, and the groove functions as a limit for the cylinder head cover contact portion.
In the cylinder head cover nut assembly, the inner edge of the groove penetrates through to the outer wall of the second sealing body.
The inner edge of the groove penetrates through the outer wall of the second sealing body, so that the outer wall of the second sealing body forms a third sealing surface, and when the cylinder head cover connecting part extrudes the first sealing surface, the cylinder head cover connecting part is tightly matched with the first sealing body, and the limiting effect is achieved. The inner wall of the connecting part on the cylinder head cover is attached to the outer wall of the second sealing body, so that when the cylinder head cover stud is locked, the connecting part extrudes the second sealing body, and the third sealing surface of the outer wall of the second sealing body is deformed, thereby achieving the sealing effect.
In the cylinder head cover nut assembly, the bottom of the first sealing body is provided with the second sealing convex edge.
The second sealing convex edge is in a circular ring shape, when the cylinder head cover is locked with the nut assembly, the cylinder head cover connecting part extrudes the first sealing body, the first sealing body deforms, and the second sealing convex edge also deforms, so that the sealing effect is achieved, and the sealing performance between the sealing element and the gasket is further enhanced.
In the cylinder head cover nut assembly, the thickness of the second sealing body is larger than that of the first sealing body.
In the cylinder head cover nut assembly, the top of the screw is provided with a threaded hole.
If the outer wall of the screw rod is provided with threads, a gap is formed between the sealing element and the outer threads, so that a good sealing effect cannot be achieved, and the requirement on the arrangement position of the sealing element is high. And the thread is processed in the inner hole of the screw rod, so that the situation can be avoided.
In the cylinder head cover nut assembly, the outer edge of the gasket is provided with the limiting edge.
The limiting edge is used for fixing the position of the sealing element and preventing the sealing element from generating radial deviation.
Compared with the prior art, the cylinder head cover nut assembly has the following advantages:
1. the cylinder head cover nut assembly adopts a sealing element thickening design, forms a first sealing body and a second sealing body, realizes double sealing, prolongs the sealing stroke and plays a role in excellent sealing.
2. The cylinder head cover nut assembly further enhances the sealing property through the convex edge design of the second sealing surface.
3. Through the thickening design of the sealing element and the built-in design of the screw thread in the cylinder head cover nut assembly, the problem of sealing performance caused by external threads to the sealing element is directly avoided, and the structural design is ingenious.
Drawings
Fig. 1 is a schematic structural view (partially in section) of the present cylinder head cover nut assembly.
Fig. 2 is an enlarged view of a structure of a region a in fig. 1.
Fig. 3 is an enlarged view of a structure of a region B in fig. 1.
List of reference numerals
In the figure:
1. a bolt;
1a, a screw rod;
1a1, threaded hole;
2. a gasket;
2a, a limiting edge;
3. a seal member;
3a, a first sealing body;
3a1, first sealing surface;
3a2, groove;
3a3, second sealing flange;
3b, a second sealing body;
3a3b, second sealing surface;
3c, a first sealing convex edge.
Detailed Description
As shown in fig. 1 to 3, the cylinder head cover nut assembly includes a bolt 1, one end of the bolt 1 is a head, the other end is a threaded rod 1a, the top of the threaded rod 1a is threaded, a gasket 2 and a sealing element 3 are sleeved on the threaded rod 1a, the sealing element 3 includes a first sealing body 3a and a second sealing body 3b which are connected, the outer diameter of the second sealing body 3b is smaller than that of the first sealing body 3a, the thickness of the first sealing body 3a is 1mm, a first sealing surface 3a1 is arranged on the first sealing body 3a, and the inner hole walls of the first sealing body 3a and the second sealing body 3b are second sealing surfaces 3a3 b. The cylinder head cover nut assembly is connected with the cylinder head cover, when a stud on the cylinder head cover is locked with a screw thread of the nut assembly, the steel head cover is contacted with the first sealing surface 3a1 to extrude the first sealing surface 3a1 to enable the first sealing surface 3a1 to deform, the second sealing surface 3a3b is attached to the screw rod 1a to form sealing, the sealing stroke is prolonged, good sealing effect is achieved, oil leakage is prevented, and therefore the cylinder head cover directly extrudes the sealing ring differently from the cylinder head cover in the prior art, and double sealing effect is formed through the first sealing surface 3a1 and the second sealing surface 3a3 b. The thickness of the first sealing body 3a is at least 1mm, and when the thickness is less than 1mm, the cylinder head cover presses the first sealing body 3a, and oil leakage, burst of the first sealing body 3a, and the like may occur. The gasket 2 is positioned between the head of the bolt 1 and the sealing element 3, and the function of the gasket 2 is to prevent the sealing element 3 from radially expanding and bursting. The first sealing body 3a and the second sealing body 3b are coaxially arranged in inner holes, and the first sealing body 3a and the second sealing body 3b are of a T-shaped structure overall. The first sealing body 3a and the second sealing body 3b are of an integral structure. The inner walls of the first sealing body 3a and the second sealing body 3b are provided with first sealing convex edges 3 c. When the first sealing convex edge 3c is simultaneously positioned on the first sealing body 3a and the second sealing body 3b, the cylinder head cover stud is locked, the first sealing body 3a is extruded at the bottom of the cylinder head cover connecting part, the second sealing body 3b is extruded at the inner wall of the cylinder head cover connecting part, and the first sealing body 3a and the second sealing body 3b are deformed, so that the first sealing convex edge 3c is also deformed, and the sealing performance of the cylinder head cover nut assembly is enhanced. The first sealing body 3a has a top surface formed with a groove 3a2, and the bottom surface of the groove 3a2 is a first sealing surface 3a 1. In this solution, the first sealing surface 3a1 is the bottom surface of the groove 3a2, and the groove 3a2 functions as a limit for the cylinder head cover contact position.
The inner edge of the groove 3a2 penetrates to the outer wall of the second sealing body 3 b. The inner edge of the groove 3a2 penetrates to the outer wall of the second sealing body 3b, so that the outer wall of the second sealing body 3b forms a third sealing surface, and when the cylinder head cover connecting part presses the first sealing surface 3a1, the cylinder head cover connecting part is tightly matched with the first sealing body 3a, and the limiting effect is achieved. The inner wall of the connecting part on the cylinder head cover is jointed with the outer wall of the second sealing body 3b, so that when the cylinder head cover stud is locked, the connecting part extrudes the second sealing body 3b, and the third sealing surface of the outer wall of the second sealing body 3b is deformed, thereby achieving the sealing effect. The bottom of the first sealing body 3a is provided with a second sealing convex edge 3a 3. The second sealing flange 3a3 is circular, when the cylinder head cover is locked with the nut assembly, the cylinder head cover connecting part presses the first sealing body 3a, the first sealing body 3a deforms, and the second sealing flange 3a3 also deforms, so that the sealing effect is achieved, and the sealing performance between the sealing element 3 and the gasket 2 is further enhanced. The thickness of the second sealing body 3b is larger than that of the first sealing body 3 a. The top of the screw rod 1a is provided with a threaded hole 1a 1. If the outer wall of the screw rod 1a is provided with threads, a gap is generated between the sealing element 3 and the external threads, so that a good sealing effect cannot be achieved, and the requirement on the arrangement position of the sealing element 3 is high. The thread is processed in the inner hole of the screw rod 1a, so that the situation can be avoided. The outer edge of the gasket 2 is provided with a limiting edge 2 a. The function of the limiting edge 2a is to fix the position of the sealing element 3 and prevent the sealing element 3 from radially deviating.
Details, structures, dimensions and principles not mentioned in the present application are all known in the art or can be obtained by simple selection of those skilled in the art, and are not described in detail.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (9)
1. The cylinder head cover nut assembly comprises a bolt, one end of the bolt is a head, the other end of the bolt is a screw rod, the top of the screw rod is threaded, a gasket and a sealing piece are sleeved on the screw rod, the cylinder head cover nut assembly is characterized in that the sealing piece comprises a first sealing body and a second sealing body which are connected, the outer diameter of the second sealing body is smaller than that of the first sealing body, the thickness of the first sealing body is at least 1mm, a first sealing surface is arranged on the first sealing body, and the inner hole wall of the first sealing body and the inner hole wall of the second sealing body are second sealing surfaces.
2. The cylinder head cover nut assembly of claim 1 wherein the first and second sealing bodies are coaxially disposed within the bore, the first and second sealing bodies being generally T-shaped in configuration.
3. The cylinder head cover nut assembly according to claim 1 or 2, characterized in that an inner wall of at least one of said first and second sealing bodies is provided with at least one first sealing bead.
4. The cylinder head cover nut assembly of claim 1 or 2 wherein the first seal body top surface defines a groove, the groove bottom surface being the first sealing surface.
5. The cylinder head cover nut assembly of claim 4 wherein an inner edge of the groove extends through to an outer wall of the second seal body.
6. The cylinder head cover nut assembly of claim 1, 2 or 5 wherein the bottom of the first sealing body is provided with a second sealing ledge.
7. The cylinder head cover nut assembly of claim 1, 2 or 5 wherein the second sealing body has a greater thickness than the first sealing body.
8. The cylinder head cover nut assembly of claim 1, 2 or 5 wherein the top of the threaded rod is provided with a threaded hole.
9. The cylinder head cover nut assembly of claim 1, 2 or 5 wherein the gasket outer edge is provided with a stop edge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921524612.5U CN210600158U (en) | 2019-09-15 | 2019-09-15 | Cylinder head cover nut assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921524612.5U CN210600158U (en) | 2019-09-15 | 2019-09-15 | Cylinder head cover nut assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210600158U true CN210600158U (en) | 2020-05-22 |
Family
ID=70697184
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921524612.5U Expired - Fee Related CN210600158U (en) | 2019-09-15 | 2019-09-15 | Cylinder head cover nut assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210600158U (en) |
-
2019
- 2019-09-15 CN CN201921524612.5U patent/CN210600158U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200522 |