Cylinder head sealing and cooling performance improvement structure

Abstract

The present invention discloses a structure for improving the sealing and cooling performance of a cylinder head, including a plurality of flange structures, which are arranged on one side of the cylinder bore exhaust hole of the cylinder head, and each flange structure includes three bolt holes perpendicular to the flange structure, and the three bolt holes are arranged in an inverted triangle. The structure for improving the sealing and cooling performance of the cylinder head of the present invention, by changing the two-hole flange structure to a three-hole flange structure, enhances the flange sealing ability, makes the sealing surface more evenly stressed, and solves the problem of air leakage of the two-hole flange. At the same time, a first recessed portion and a second recessed portion are added to the upper water jacket area, and a third recessed area is opened in the lower water jacket area, so that the water jacket structure of the cylinder head is effectively improved, and the cooling effect at the flange and the bolt holes is significantly improved.

Description

Technical Field

[0001] The invention relates to the field of engines, and in particular to a structure for improving the sealing and cooling performance of a cylinder head. Background Art

[0002] Each cylinder flange of the existing cylinder head 10 is fastened with only two bolts. Figure 1 As shown in the figure, the two-hole flange structure only has two upper and lower bolt holes and the first recessed part between the flange structures. In this way, the tightening force is concentrated around the bolts. At high temperatures, the exhaust pipe is deformed, the gasket seal fails, and the thermal deformation of the exhaust pipe interferes with the bolts. The stress will be transmitted to the cylinder head through the bolts, causing cracks in the cylinder head screw holes. This proposal solves the existing fault by improving the flange structure connecting the cylinder head and the exhaust pipe, while improving the internal water jacket structure, strengthening the cooling and tightening and sealing capabilities at the flange,

[0003] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention and should not be regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the invention

[0004] The object of the present invention is to provide a structure for improving the sealing and cooling performance of a cylinder head, which can overcome the defects of a two-hole flange structure.

[0005] To achieve the above-mentioned objectives, the present invention provides a structure for improving the sealing and cooling performance of a cylinder head, comprising a plurality of flange structures, which are arranged on one side of the cylinder bore exhaust hole of the cylinder head, each flange structure comprising three bolt holes perpendicular to the flange structure, and the three bolt holes are arranged in an inverted triangle.

[0006] In a preferred embodiment, the upper two of the three bolt holes are symmetrically arranged relative to the vertical center line of the cylinder bore exhaust pipe of the cylinder head, and the lower one of the three bolt holes is located on the vertical center line of the cylinder bore exhaust pipe of the cylinder head.

[0007] In a preferred embodiment, the upper two of the three bolt holes are located in the upper water jacket area of ​​the cylinder head.

[0008] In a preferred embodiment, the lower one of the three bolt holes is located in the lower water jacket area of ​​the cylinder head.

[0009] In a preferred embodiment, the structure for improving the sealing and cooling performance of the cylinder head also includes a plurality of first recessed portions, a plurality of second recessed portions and a plurality of third recessed portions; the plurality of first recessed portions are arranged at the upper portion of each flange structure and are located between the two bolt holes located at the upper portion among the three bolt holes; the plurality of second recessed portions are arranged between the upper portions of two adjacent flange structures; and the plurality of third recessed portions are arranged between the lower portions of two adjacent flange structures.

[0010] In a preferred embodiment, a plurality of flange structures are arranged in a straight line and connected to form a connection surface with the exhaust pipe.

[0011] Compared with the prior art, the cylinder head sealing and cooling performance improvement structure of the present invention has the following beneficial effects: the present solution enhances the flange sealing ability by changing the two-hole flange structure to a three-hole flange structure, and the sealing surface is subjected to more uniform force, thereby solving the two-hole flange leakage problem. At the same time, the first and second recessed parts are added to the upper water jacket area, and the third recessed area is opened in the lower water jacket area, so that the water jacket structure of the cylinder head is effectively improved, and the cooling effect at the flange and bolt holes is significantly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a front view schematic diagram of a two-hole flange structure according to an embodiment of the prior art;

[0013] Figure 2 is a front view schematic diagram of a three-hole flange structure with an improved structure according to an embodiment of the present invention;

[0014] Figure 3 1 is a perspective schematic diagram of a cylinder head with an improved structure according to an embodiment of the present invention.

[0015] Description of main reference numerals:

[0016] 20 - cylinder head, 201 - bolt hole, 202 - first recessed portion, 203 - second recessed portion, 204 - third recessed portion, 205 - cylinder bore exhaust port. DETAILED DESCRIPTION

[0017] The specific implementation modes of the present invention are described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific implementation modes.

[0018] Unless explicitly stated otherwise, throughout the specification and claims, the term “comprise” or variations such as “include” or “comprising”, etc., will be understood to include the stated elements or components but not to exclude other elements or components.

[0019] like Figures 2 to 3As shown, a structure for improving the sealing and cooling performance of a cylinder head according to a preferred embodiment of the present invention includes a plurality of flange structures, which are arranged on one side of a cylinder bore exhaust hole 205 of a cylinder head 20, and each flange structure includes three bolt holes 201 perpendicular to the flange structure, and the three bolt holes 201 are arranged in an inverted triangle.

[0020] In some embodiments, the upper two of the three bolt holes 201 are symmetrically arranged relative to the vertical center line of the cylinder bore exhaust pipe of the cylinder head 20, and the lower one of the three bolt holes 201 is located on the vertical center line of the cylinder bore exhaust pipe of the cylinder head 20.

[0021] In some embodiments, the upper two of the three bolt holes 201 are located in the upper water jacket area of ​​the cylinder head 20 .

[0022] In some embodiments, the lower one of the three bolt holes 201 is located in the lower water jacket area of ​​the cylinder head 20 .

[0023] In some embodiments, the structure for improving the sealing and cooling performance of the cylinder head further includes a plurality of first recessed portions 202, a plurality of second recessed portions 203, and a plurality of third recessed portions 204. The plurality of first recessed portions 202 are arranged at the upper portion of each flange structure and are located between the two bolt holes 201 located at the upper portion of the three bolt holes 201. The plurality of second recessed portions 203 are arranged between the upper portions of two adjacent flange structures. The plurality of third recessed portions 204 are arranged between the lower portions of two adjacent flange structures. The first recessed portions 202, the second recessed portions 203, and the third recessed portions 204 are all arranged adjacent to the three bolt holes 201, so that the wall thickness around the bolt holes 201 is as suitable as possible for the heat dissipation of the upper and lower water jackets while ensuring the connection strength of the bolt holes 201, and at the same time, the stress around the bolt holes 201 can be effectively reduced to avoid cracking there.

[0024] In some embodiments, a plurality of flange structures are arranged in a straight line and connected to form a connection surface with the exhaust pipe.

[0025] In conclusion, the cylinder head sealing and cooling performance improvement structure of the present invention has the following advantages: the present solution enhances the flange sealing ability by changing the two-hole flange structure to a three-hole flange structure, and the sealing surface is subjected to more uniform force, thereby solving the two-hole flange leakage problem. At the same time, the first and second recessed portions are added to the upper water jacket area, and the third recessed area is opened in the lower water jacket area, so that the water jacket structure of the cylinder head is effectively improved, and the cooling effect at the flange and bolt holes is significantly improved.

[0026] The foregoing description of specific exemplary embodiments of the present invention is for the purpose of illustration and demonstration. These descriptions are not intended to limit the present invention to the precise form disclosed, and it is clear that many changes and variations can be made based on the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art can realize and utilize various different exemplary embodiments of the present invention and various different selections and changes. The scope of the present invention is intended to be limited by the claims and their equivalents.

Claims

1. A structure for improving the sealing and cooling performance of a cylinder head, characterized in that: It comprises a plurality of flange structures, which are arranged on one side of the cylinder bore exhaust hole of the cylinder head, each of the flange structures comprises three bolt holes perpendicular to the flange structure, and the three bolt holes are arranged in an inverted triangle; The two upper bolt holes of the three bolt holes are symmetrically arranged relative to the vertical center line of the cylinder bore exhaust pipe of the cylinder head, and the lower bolt hole of the three bolt holes is located on the vertical center line of the cylinder bore exhaust pipe of the cylinder head; The two upper bolt holes of the three bolt holes are located in the upper water jacket area of ​​the cylinder head; wherein the lower one of the three bolt holes is located in the lower water jacket area of ​​the cylinder head; The improved structure also includes: A plurality of first recessed portions, which are arranged at the upper portion of each of the flange structures and are located between two bolt holes located at the upper portion of the three bolt holes; a plurality of second recessed portions, which are arranged between the upper portions of two adjacent flange structures; and A plurality of third recessed portions, which are arranged between the lower portions of two adjacent flange structures; The first recessed portion, the second recessed portion and the third recessed portion are all arranged adjacent to the three bolt holes; The plurality of flange structures are arranged in a straight line and connected to form a connection surface with the exhaust pipe.

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