A new cylinder head cover gasket structure
By designing a multi-layer sealing structure on the cylinder head cover, including a layer of SPCC cold-rolled carbon steel sheet and a fluororubber layer, combined with arc-shaped protrusions and sealing rubber lines, the problem of oil leakage from the cylinder head cover is solved, and the sealing performance and durability are improved.
Patent Information
- Application Number
- CN202521852809.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-29
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-08-29
AI Technical Summary
The existing cylinder head cover has an oil leakage problem, which affects the engine's sealing and stability.
It adopts a multi-layer sealing structure, including a gasket with a layer of SPCC cold-rolled carbon steel sheet and a layer of fluororubber, combined with arc-shaped protrusions and sealing lines to form an inner, middle and outer three-layer seal, which is fixed with screws.
It improves the sealing and durability of the cylinder head cover, reduces the oil leakage failure rate, and ensures long-term sealing performance.
Smart Images
Figure CN224679593U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of cylinder head covers, and more specifically, to a novel cylinder head cover gasket structure. Background Technology
[0002] The cylinder head cover is a critical engine component, its main function being to cover and seal the cylinder head, preventing impurities from entering. It facilitates oil return through the condensation of oil mist and also serves as an oil filler cap and sensor mounting base. In the heavy-duty truck sector, its design incorporates structural optimizations to enhance stability. This component is widely used in diesel engines, loaders, and other machinery, and is paired with specialized gaskets.
[0003] The cylinder head cover is an important structural component of the engine. The cylinder head cover and cylinder head cover gasket are mounted on the engine cylinder head using fixing bolts. Oil leakage problems with cylinder head covers are frequently reported in the market. This paper proposes a new cylinder head cover gasket structure, optimizing the gasket design to reduce the occurrence of oil leakage problems. Summary of the Invention
[0004] To overcome the shortcomings of existing gaskets, this application provides a novel cylinder head cover gasket structure that addresses the common market report of cylinder head cover oil leakage. This paper proposes a novel cylinder head cover gasket structure that optimizes the gasket design to reduce the occurrence of oil leakage.
[0005] The technical solution adopted by the embodiments of this application to solve its technical problem is:
[0006] A novel cylinder head cover gasket structure includes a cylinder head assembly and a sealing assembly.
[0007] The cylinder head assembly includes a cylinder head body and an outer cylinder head cover, the outer cylinder head cover being disposed on top of the cylinder head body.
[0008] The sealing assembly includes a sealing gasket and a sealing adhesive line. The sealing adhesive line is disposed on the outside of the sealing gasket. The sealing gasket has protrusions. The sealing gasket is located between the cylinder head body and the outer cylinder head cover. The sealing gasket includes an intermediate base layer, a first sealing layer and a second sealing layer. The first sealing layer is disposed on one side of the intermediate base layer and the second sealing layer is disposed on the other side of the intermediate base layer.
[0009] In one specific implementation, the intermediate base layer is an SPCC cold-rolled carbon steel sheet layer.
[0010] In one specific implementation, both the first sealing layer and the second sealing layer are fluororubber layers, and the first sealing layer and the second sealing layer together wrap around the outside of the intermediate base layer.
[0011] In the above implementation process, by setting both the first sealing layer and the second sealing layer to be fluororubber layers, fluororubber has the properties of low temperature and high temperature resistance, and can resist aging, thus ensuring good sealing performance for a long time.
[0012] In one specific implementation, the protrusion is arc-shaped and located on both sides of the sealant line.
[0013] In the above implementation process, by setting an arc-shaped protrusion, when the protrusion is pressed and expands downward, there is also a retraction stress. Together with the sealing glue line, it can play the role of inner, middle and outer three-layer sealing.
[0014] In one specific implementation, the sealing gasket has a nail hole.
[0015] In the above implementation process, through holes are made for screws to pass through during installation.
[0016] In one specific implementation, the outer cylinder head cover is provided with through-holes, and the through-holes correspond to the through-holes.
[0017] In the above implementation process, through-holes are provided for screws to pass through and fix the outer cylinder head cover and sealing gasket to the cylinder head.
[0018] In one specific implementation, the sealing gasket is adapted to the bottom of the outer cylinder head cover, and the outer cylinder head cover is pressed against the top of the sealing gasket.
[0019] In the above process, the shape of the sealing gasket is the same as the bottom shape of the outer cylinder head cover, thereby ensuring proper installation and high sealing performance.
[0020] In one specific implementation, the sealant line has a semi-circular cross-section.
[0021] In the above process, the semi-circular cross-section of the sealing glue line can deform evenly when subjected to compression, resulting in high sealing performance.
[0022] The advantages of this application embodiment are: by setting the cylinder head body, outer cylinder head cover, sealing gasket, protrusion, and sealing glue line, the sealing performance can be improved after installation and fixing by using multiple protrusions and sealing glue lines. At the same time, the sealing gasket includes an intermediate base layer, a first sealing layer, and a second sealing layer. The multi-layer design improves durability and thus ensures long-term sealing performance. Attached Figure Description
[0023] Figure 1 This is a schematic diagram of the novel cylinder head cover gasket structure provided in the embodiments of this application;
[0024] Figure 2A schematic diagram of the sealing assembly structure provided for an embodiment of this application;
[0025] Figure 3 A schematic diagram of the sealing gasket structure provided for an embodiment of this application;
[0026] Figure 4 A schematic diagram of the protrusion structure provided for an embodiment of this application.
[0027] In the diagram: 100-Cylinder head assembly; 110-Cylinder head body; 120-Outer cylinder head cover; 121-Thrust hole; 200-Sealing assembly; 210-Sealing gasket; 211-Intermediate base layer; 212-First sealing layer; 213-Second sealing layer; 220-Protrusion; 230-Sealing adhesive line; 240-Thrust hole. Detailed Implementation
[0028] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with embodiments.
[0029] It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.
[0030] In the embodiments, unless otherwise specified, all methods used are conventional methods in the art.
[0031] Please see Figures 1-4 This application provides a novel cylinder head cover gasket structure including a cylinder head assembly 100 and a sealing assembly 200.
[0032] Please see Figure 1 The cylinder head assembly 100 includes a cylinder head body 110 and an outer cylinder head cover 120, with the outer cylinder head cover 120 disposed on the top of the cylinder head body 110.
[0033] Please see Figure 1 , 2 3 and 4, the sealing assembly 200 includes a sealing gasket 210 and a sealing adhesive line 230. The sealing adhesive line 230 is disposed on the outside of the sealing gasket 210. The sealing gasket 210 is provided with a protrusion 220. The sealing gasket 210 is located between the cylinder head body 110 and the outer cylinder head cover 120. The sealing gasket 210 includes an intermediate base layer 211, a first sealing layer 212 and a second sealing layer 213. The first sealing layer 212 is disposed on one side of the intermediate base layer 211 and the second sealing layer 213 is disposed on the other side of the intermediate base layer 211.
[0034] The intermediate base layer 211 is a thin layer of SPCC cold-rolled carbon steel. The first sealing layer 212 and the second sealing layer 213 are both fluororubber layers. The first sealing layer 212 and the second sealing layer 213 are wrapped around the outside of the intermediate base layer 211. By setting the first sealing layer 212 and the second sealing layer 213 to be fluororubber layers, fluororubber has low temperature and high temperature resistance and can resist aging, thus ensuring good sealing performance for a long time.
[0035] Specifically, the protrusion 220 is arc-shaped and located on both sides of the sealing line 230. By setting the arc-shaped protrusion 220, when the protrusion 220 is pressed down and stretches, there is also a retraction stress. Together with the sealing line 230, it can play the role of inner, middle and outer three-layer sealing.
[0036] In one specific implementation, the sealing gasket 210 has a through hole 240 for a screw to pass through.
[0037] In this embodiment, the outer cylinder head cover 120 is provided with a through-hole 121, which corresponds to the through-hole 240. The through-hole 121 is provided to allow the screws for installation to pass through and fix the outer cylinder head cover 120 and the sealing gasket 210 to the cylinder head.
[0038] In one specific embodiment, the sealing gasket 210 and the bottom of the outer cylinder head cover 120 are adapted to each other, and the outer cylinder head cover 120 is pressed against the top of the sealing gasket 210.
[0039] It should be noted that the sealant line 230 has a semi-circular cross-section. The semi-circular cross-section of the sealant line 230 can deform evenly when compressed, resulting in high sealing performance.
[0040] The working principle of this new cylinder head cover gasket structure is as follows: It consists of an intermediate base layer 211, a first sealing layer 212, and a second sealing layer 213. The intermediate base layer 211 is made of SPCC cold-rolled carbon steel sheet, and the first and second sealing layers 212 and 213 are made of fluororubber. Fluororubber has resistance to low and high temperatures, is anti-aging, has excellent sealing performance, and is more durable under high pressure. The semi-circular cross-section sealing line 230 on the sealing gasket 210, combined with the arc-shaped protrusions 220 on both sides of the sealing line 230, when the outer cylinder head cover 120 is tightened, the protrusions 220 are compressed downwards and simultaneously experience retraction stress. Together with the sealing line 230, this provides a three-layer sealing effect (inner, middle, and outer). This structure effectively improves the problem of cylinder head cover gasket aging and leakage, reducing the failure rate of cylinder head cover leakage.
[0041] It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from the spirit or essential characteristics of this application. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this application is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this application. No reference numerals in the claims should be construed as limiting the scope of the claims.
Claims
1. A novel cylinder head cover gasket structure, characterized in that, include Cylinder head assembly (100), the cylinder head assembly (100) includes a cylinder head body (110) and an outer cylinder head cover (120), the outer cylinder head cover (120) being disposed on the top of the cylinder head body (110); A sealing assembly (200) includes a sealing gasket (210) and a sealing adhesive line (230). The sealing adhesive line (230) is disposed on the outside of the sealing gasket (210). The sealing gasket (210) is provided with a protrusion (220). The sealing gasket (210) is located between the cylinder head body (110) and the outer cylinder head cover (120). The sealing gasket (210) includes an intermediate base layer (211), a first sealing layer (212), and a second sealing layer (213). The first sealing layer (212) is disposed on one side of the intermediate base layer (211), and the second sealing layer (213) is disposed on the other side of the intermediate base layer (211).
2. The novel cylinder head cover gasket structure according to claim 1, characterized in that, The intermediate base layer (211) is a SPCC cold-rolled carbon steel sheet layer.
3. The novel cylinder head cover gasket structure according to claim 1, characterized in that, The first sealing layer (212) and the second sealing layer (213) are both fluororubber layers, and the first sealing layer (212) and the second sealing layer (213) are wrapped together on the outside of the intermediate base layer (211).
4. The novel cylinder head cover gasket structure according to claim 1, characterized in that, The protrusion (220) is arc-shaped and is located on both sides of the sealing adhesive line (230).
5. The novel cylinder head cover gasket structure according to claim 1, characterized in that, The sealing gasket (210) has a nail hole (240).
6. A novel cylinder head cover gasket structure according to claim 5, characterized in that, The outer cylinder head cover (120) has a through-hole (121), which corresponds to the through-hole (240).
7. The novel cylinder head cover gasket structure according to claim 1, characterized in that, The sealing gasket (210) and the bottom of the outer cylinder head cover (120) are adapted to each other, and the outer cylinder head cover (120) is pressed against the top of the sealing gasket (210).
8. The novel cylinder head cover gasket structure according to claim 1, characterized in that, The sealant line (230) has a semi-circular cross-section.