CN209942964U

CN209942964U - Sealing gasket for cylinder head cover of engine

Info

Publication number: CN209942964U
Application number: CN201920877356.1U
Authority: CN
Inventors: 贾亚平; 华红红; 于玲玲
Original assignee: QINGDAO HILYWILL ADVANCED MATERIALS TECHNOLOGY Co Ltd
Current assignee: QINGDAO HILYWILL ADVANCED MATERIALS TECHNOLOGY Co Ltd
Priority date: 2019-06-12
Filing date: 2019-06-12
Publication date: 2020-01-14
Anticipated expiration: 2029-06-12

Abstract

A sealing gasket of an engine cylinder head cover relates to the technical field of engine sealing, and comprises a sealing strip and a semicircular sealing block arranged at the lower end of the sealing strip, wherein the sealing strip and the semicircular sealing block are of an integrally formed structure, a first sealing rib protruding outwards is arranged on an arc surface of the sealing block, a circle of flange is arranged at the edges of two side surfaces of the sealing block, a compression elastic sheet is arranged in the sealing block, the two side surfaces of the compression elastic sheet are semicircular, the edges of the two side surfaces extend into the flange, and included angles between the two side surfaces of the compression elastic sheet and the upper end surface are smaller; the groove formed by the flange and the sealing rib is clamped on the inner wall of the semicircular fabrication hole on the cylinder cover, and the flange is clamped on two side surfaces of the inner wall of the fabrication hole. This is novel has reduced cylinder head cover's the processing degree of difficulty and cost, and sealed muscle one makes the recess form inclosed cavity with sealed muscle two simultaneously, and the flange and the setting that compresses tightly the shell fragment can increase the seal of this cavity to can ensure the sealing performance of fabrication hole department.

Description

Sealing gasket for cylinder head cover of engine

Technical Field

The utility model relates to an engine sealing technique field, concretely relates to engine cylinder head cover is sealed fills up.

Background

In order to prevent engine oil from leaking and external impurities from entering the engine, a sealing gasket is required to be used for sealing between the cylinder cover and the cylinder cover of the engine. In the cylinder head machining process, in order to reduce the height of an engine overhead camshaft, the central line of the camshaft is reduced to the end face of the cylinder head in the prior art, and a camshaft support and the cylinder head are machined into a whole, so that a semicircular machining process hole can be left on the cylinder head while a camshaft mounting hole is machined. In order to ensure the sealing performance after the cylinder cover and the cylinder head cover are assembled, the sealing effect of the semicircular process hole is required to be good.

As shown in fig. 1, in the prior art, a cylinder head 1 and a cylinder head cover 2 are sealed by a gasket 3, a semicircular processing fabrication hole 4 on the cylinder head is sealed by matching a semicircular protruding block 21 on the cylinder head cover with a semicircular lower recess 31 on the gasket 3, and the section structure of the semicircular lower recess 31 on the gasket 3 is consistent with the section of the whole gasket. When the sealing gasket of the cylinder head cover is used, the requirements on the machining size precision and the profile tolerance of the semicircular convex block on the cylinder head cover are extremely high, the machining cost of the cylinder head cover is greatly increased, the semicircular lower concave part of the sealing gasket is positioned only in the horizontal direction at the edge of the cylinder head cover, and the semicircular lower concave part is easy to incline when being installed, so that the oil leakage phenomenon is caused when the sealing at the machining process hole is not tight; in addition, because of the cylinder head has certain assembly error (this error is the error in installation allowed range) when installing with the cylinder head cover, under the powerful extrusion force between long-time cylinder head and the cylinder head cover, the arc surface of semicircle protruding piece makes the semicircle concave part of sealed pad bigger than the atress at the rest positions of gasket, thereby it is bigger to lead to the compression ratio of semicircle concave part, thereby cause the easy slope of semicircle concave part, crooked, lead to the engine oil to reveal, make the whole sealed stability variation that fills up.

Disclosure of Invention

The utility model provides an engine cylinder head cover is sealed to be filled up for solve prior art, big, with high costs with the cylinder head complex cylinder head shroud processing degree of difficulty that has semi-circular processing technology hole, and because of the powerful extrusion force of cylinder head cover and cylinder head, easily cause the problem of the sealed pad inefficacy between cylinder head cover and the cylinder head.

The purpose of the utility model can be realized by the following technical proposal: a sealing gasket of an engine cylinder head cover is arranged between a cylinder head and the cylinder head cover of an engine and comprises a sealing strip and a semicircular sealing block arranged at the lower end of the sealing strip, wherein the sealing strip and the semicircular sealing block are of an integrally formed structure, a first sealing rib protruding outwards is arranged on an arc surface of the sealing block, a circle of flange is arranged at the edges of two side surfaces of the sealing block, a pressing elastic sheet with an inverted U-shaped section is arranged in the sealing block, the two side surfaces of the pressing elastic sheet are semicircular, the edges of the two side surfaces extend into the flange, and included angles between the two side surfaces of the pressing elastic sheet and the upper end surface are smaller than 90 degrees; the flange and the first sealing rib form an inverted U-shaped groove which is clamped on the inner wall of the semicircular fabrication hole on the cylinder cover, and the flange is clamped on two side faces of the inner wall of the fabrication hole.

Preferably, a groove is formed in each of two corners of the groove, and a second sealing rib protrudes from the inner side surfaces of the two flanges and is adjacent to the groove. When the sealing device is assembled in a sealing state, the first sealing rib is tightly pressed on the inner wall of the process hole in a sealing mode, the flanges on two sides of the sealing block are tightly clamped on two side faces of the process hole, and the second sealing rib is tightly attached to the inner wall of the process hole in a sealing mode, so that the groove forms a sealed cavity, a small amount of lubricating oil is stored, the lubricating oil can be prevented from leaking outwards, and the sealing performance of the sealing block is further enhanced.

Preferably, the cross section of the first sealing rib is semi-elliptical, and the cross section width of the first sealing rib is smaller than the width of the semi-arc inner wall of the process hole. After the elliptic section is sealed with the surface of the fabrication hole, under the action of strong pressure, the compression ratio of the sealing rib I is gradually increased from the two ends of the elliptic section to the direction of the central line position, and the compression ratio reaches the strongest position at the central line position, so that the sealing effect of the semicircular fabrication hole is improved; in addition, the elliptical cross-sectional shape can increase the sealing contact area with the inner wall of the fabrication hole when stressed, and the sealing effect at the fabrication hole is enhanced.

Preferably, the inner side surface of the flange is parallel to the inner wall of the fabrication hole, an included angle between the outer side surface and the inner side surface is an acute angle, and an opening of the included angle faces the sealing block. The outer side surface is arranged to be an inclined surface, so that the sealing gasket mold is easy to process and is convenient to take out of the mold.

Preferably, the included angle between the inner side surface and the outer side surface of the flange is 10-15 degrees.

Preferably, the section of the sealing strip is rectangular, and a sealing rib III protrudes outwards from both the upper end face and the lower end face of the sealing strip. The third sealing rib can enhance the sealing effect between the whole cylinder cover and the cylinder cover hood.

Preferably, the cross-sectional shapes of the second sealing rib and the third sealing rib are both semicircular.

The utility model discloses the combined effect who brings includes: the novel sealing structure is simple and reasonable in structure and convenient to use, the sealing block is integrally formed and processed at the lower end of the sealing strip and is in sealing contact with the fabrication hole, and the processing difficulty and cost of the cylinder head cover are reduced; flanges are arranged on two sides of the sealing block, and meanwhile, the compression spring pieces are arranged in the flanges, so that the sealing gasket is convenient to position when being installed, the oil leakage phenomenon caused by the fact that the sealing gasket is inclined and bent due to installation inclination or pressure of the sealing block is avoided, included angles of two side surfaces of the compression spring pieces are smaller than 90 degrees, the flanges can be further clamped on two sides of the fabrication hole, the sealing performance of the sealing block can be enhanced while the positioning accuracy of the sealing block is ensured; therefore, the first sealing rib and the second sealing rib enable the groove to form a closed cavity, and the arrangement of the flange and the pressing elastic sheet can increase the tightness of the cavity, so that the sealing performance of the process hole can be ensured.

Drawings

Fig. 1 is a schematic diagram of an explosion structure in the background art of the present invention.

Fig. 2 is an explosion schematic diagram of the installation of the sealing gasket of the cylinder head cover of the engine of the embodiment of the invention.

Fig. 3 is a schematic diagram of the structure a-a of the gasket of the cylinder head cover according to the embodiment of the present invention.

Fig. 4 is a schematic structural diagram of the gasket B-B of the cylinder head cover of the engine of the embodiment of the present invention.

Fig. 5 is a schematic view of a C-direction structure of a gasket of a cylinder head cover according to an embodiment of the present invention.

Wherein like parts are designated by like reference numerals throughout the several views; the figures are not drawn to scale.

Detailed Description

The invention is further described with reference to the following figures and examples.

Examples

A sealing gasket 2 of an engine cylinder head cover is arranged between a cylinder head 1 and the cylinder head cover 2 of an engine and comprises a sealing strip 5 and a semicircular sealing block 6 arranged at the lower end of the sealing strip 5, wherein the sealing strip 5 and the semicircular sealing block 6 are of an integrally formed structure, a sealing rib I7 protruding outwards is arranged on an arc surface of the sealing block 6, a circle of flange 8 is arranged at the edge of each side face of the sealing block 6, a pressing elastic sheet 9 with an inverted U-shaped section is arranged in the sealing block 6, the two side faces of the pressing elastic sheet 9 are semicircular, the edges of the two side faces extend into the flange 8, and the included angle between the two side faces of the pressing elastic sheet 9 and the upper end face is; the flange 8 and the inverted U-shaped groove 10 formed by the first sealing rib 7 are clamped on the inner wall of the semicircular fabrication hole on the cylinder cover 1, and the flange 8 is clamped on two side surfaces of the inner wall of the fabrication hole. Two corners of the groove 10 are both provided with a groove 11, and a sealing rib two 12 with a semicircular section is protruded on the inner side surfaces of the two flanges 8 and at a position adjacent to the groove 11. When the sealing device is assembled and in a sealing state, the first sealing rib 7 is tightly pressed on the inner wall of the process hole in a sealing mode, the flanges 8 on two sides of the sealing block 6 are tightly clamped on two side faces of the process hole, and the second sealing rib 12 is tightly attached to the inner wall of the process hole in a sealing mode, so that the groove 11 forms a sealed cavity, a small amount of lubricating oil is stored, the lubricating oil can be prevented from leaking, and the sealing performance of the sealing block 6 is further enhanced.

In this embodiment, the cross-sectional shape of the first sealing rib 7 is a semi-ellipse, and the cross-sectional width of the first sealing rib is smaller than the width of the semi-circular inner wall of the process hole, and in this embodiment, the end portions of the cross-sectional shape are respectively 2mm smaller than the inner wall of the process hole. After the elliptic section is sealed with the surface of the fabrication hole, under the action of strong pressure, the compression ratio of the sealing rib I7 is gradually increased from the two ends of the elliptic section to the direction of the central line position, and the compression ratio is strongest at the central line position, so that the sealing effect of the semicircular fabrication hole is improved; in addition, the elliptical cross-sectional shape can increase the sealing contact area with the inner wall of the fabrication hole when stressed, and the sealing effect at the fabrication hole is enhanced.

In this embodiment, the inner side surface of the flange 8 is parallel to the inner wall of the fabrication hole, the included angle between the outer side surface and the inner side surface is 12 degrees, and the opening of the included angle faces the sealing block 6. The outer side surface is arranged to be an inclined surface, so that the sealing gasket mold is easy to process and is convenient to take out of the mold.

In this embodiment, the cross section of the sealing strip 5 is rectangular, and a sealing rib three 13 with a semicircular cross section protrudes outwards from both the upper end surface and the lower end surface of the sealing strip 5. The third sealing rib 13 can enhance the sealing effect between the whole cylinder head 1 and the cylinder head cover 2.

The embodiment of the utility model provides a comprehensive effect brought includes: the structure is simple and reasonable, the use is convenient, the sealing block 6 is integrally formed and processed at the lower end of the sealing strip 5, the sealing block 6 is in sealing contact with the fabrication hole, and the processing difficulty and the cost of the cylinder head cover 2 are reduced; the flanges 8 are arranged on the two sides of the sealing block 6, and the pressing elastic pieces 9 are arranged in the flanges 8, so that the sealing gasket is convenient to position when being installed, the oil leakage phenomenon caused by the fact that the sealing gasket is inclined and bent due to installation inclination or pressure of the sealing block 6 is avoided, the included angle of the two side faces of the pressing elastic pieces 9 is smaller than 90 degrees, the flanges 8 can be further clamped on the two sides of the fabrication hole, the sealing performance of the sealing block 6 can be enhanced while the positioning accuracy of the sealing block is ensured; therefore, the first sealing rib 7 and the second sealing rib 12 enable the groove 11 to form a closed cavity, and the arrangement of the flange 8 and the pressing elastic sheet 9 can increase the tightness of the cavity, so that the sealing performance of the process hole can be ensured.

The structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by people familiar with the technology, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention does not have the substantial significance in the technology, and any structure modification, ratio relationship change or size adjustment should still fall within the scope which can be covered by the technical content disclosed by the present invention without affecting the efficacy which can be produced by the present invention and the purpose which can be achieved by the present invention. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be made without substantial technical changes, and the present invention is also regarded as the scope of the present invention.

The present invention has been described above with reference to the preferred embodiments, but the scope of protection of the present invention is not limited thereto, and all technical solutions falling within the scope of the claims are within the scope of protection of the present invention. Various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict.

Claims

1. A sealing gasket of an engine cylinder head cover is arranged between a cylinder head and the cylinder head cover of an engine and is characterized by comprising a sealing strip and a semicircular sealing block arranged at the lower end of the sealing strip, wherein the sealing strip and the semicircular sealing block are of an integrally formed structure, an outwards-protruded sealing rib I is arranged on an arc surface of the sealing block, a circle of flange is arranged at the edges of two side surfaces of the sealing block, a pressing elastic sheet with an inverted U-shaped section is arranged in the sealing block, the two side surfaces of the pressing elastic sheet are semicircular, the edges of the two side surfaces extend into the flange, and included angles between the two side surfaces of the pressing elastic sheet and the upper end surface are smaller than 90 degrees; the flange and the first sealing rib form an inverted U-shaped groove which is clamped on the inner wall of the semicircular fabrication hole on the cylinder cover, and the flange is clamped on two side faces of the inner wall of the fabrication hole.

2. The engine cylinder head cover gasket of claim 1, wherein a groove is formed at each of two corners of said groove, and a second sealing rib is projected on the inner side surfaces of both said flanges at a position adjacent to said groove.

3. The engine cylinder head cover gasket according to claim 2, wherein the first sealing rib has a semi-elliptical cross-sectional shape and a cross-sectional width smaller than a width of the semi-circular inner wall of the process hole.

4. The engine cylinder head cover gasket of claim 2, wherein the inner side surface of the flange is parallel to the inner wall of the fabrication hole, the outer side surface forms an acute angle with the inner side surface, and the included angle opens toward the sealing block.

5. The engine cylinder head cover gasket of claim 4, wherein the angle between the inner side surface and the outer side surface of said flange is between 10 ° and 15 °.

6. The engine cylinder head cover gasket according to any one of claims 2 to 5, wherein the cross section of the sealing strip is rectangular, and a sealing rib III protrudes outwards from both the upper end surface and the lower end surface of the sealing strip.

7. The engine cylinder head cover gasket according to claim 6, wherein the cross-sectional shapes of the second sealing rib and the third sealing rib are both semicircular.