KR20210043157A - Head gasket having shim stopper structure by portional coating member - Google Patents

Abstract

The present invention aims to provide a head gasket having a shim stopper structure by a local coating unit. To this end, according to the present invention, the head gasket having the shim structure by the local coating unit can comprise: a pair of bead plates piled up on each other based on a vertical direction of a cylinder block by corresponding to a plurality of bore areas of the cylinder block and the exterior shape of the cylinder block for performing the sealing by being interposed between a cylinder head and the cylinder block; a shim plate interposed between the bead plates and having a plurality of hole units to be spatially connected by respectively corresponding to the bore areas; and a shim structure having a coating unit formed by spreading a coating agent locally on an upper surface or a lower surface of the shim plate based on an edge of the hole units. The present invention aims to provide the head gasket having the shim stopper structure by the local coating unit, which is able to economically improve shim stopper functions in the head gasket.

Description

Head gasket with shim stopper structure by local coating part {HEAD GASKET HAVING SHIM STOPPER STRUCTURE BY PORTIONAL COATING MEMBER}

The present invention relates to a head gasket having a shim stopper structure by a local coating portion.

In general, some of the heat generated in the combustion chamber of an engine is absorbed by the cylinder head, cylinder block, intake and exhaust valve, and piston.

Head gaskets can also be used with these components.

The head gasket according to the prior art is a thin metal plate that fits between the cylinder block of the engine and the cylinder head, and is a very important and difficult part because it is an object that maintains airtightness between the cylinder block and the cylinder head.

In particular, during engine maintenance, the head gasket must be replaced or repaired in order to prevent a decrease in the airtightness of the inner piston and the cylinder, and thus economical mass production technology has become very important while maintaining airtightness.

However, the head gasket according to the prior art has a disadvantage in that the airtight performance is inferior since a shim stopper having the same thickness is simply interposed between the bead plates.

In addition, some conventional shim stoppers combine steel plates of different thicknesses, but because they are specifications that implement a bore, that is, a stopper thickness step around the combustion chamber, by applying different types of stoppers with different thicknesses in combination, manufacturing is not possible. It is very difficult and has the disadvantage of inefficient manufacturing economy.

In particular, since the head gasket of the prior art is applied in the engine technology field or the technical field of a professional company related to bore, and is applied in the area where the most cost is incurred in engine repair, it is very economical mass production for head gaskets in preparation for possible engine failure. There is an urgent need for a technology capable of improving confidentiality while making this possible.

The present invention has been devised to solve the conventional technical requirements as described above, and provides a head gasket having a shim stopper structure by a local coating unit that can economically improve the shim stopper function inside the head gasket. There is this.

As a technical means for achieving the above technical problem, the head gasket having a shim stopper structure by the local coating unit of the present invention is interposed between the cylinder head and the cylinder block to perform sealing, A pair of bead plates formed to correspond to two bore regions and an outer shape of the cylinder block, and stacked on each other based on a vertical direction of the cylinder block; And a simplerate interposed between the bead plates and formed with a plurality of holes so as to be spatially connected to correspond to the bore regions, and a coating agent locally on the top or bottom surface of the simplerate based on the rim of the hole. It may include a core structure having a coating portion formed by applying.

In addition, the bead plate includes a bore border portion, which is a flat plate portion arranged in an integral manner and arranged along a direction toward the outer surface of the cylinder block with respect to the bore area, and integrally formed from the outside of the bore border portion and upward or downward. As a portion bent to have a semi-elliptical cross-sectional shape, a full bead portion that contacts the surface of the cylinder head or the surface of the cylinder block to maintain airtightness, an extension portion that is a flat plate portion extending from the outside of the full bead portion, and the expansion It may include a half bead portion bent to have a step difference, such as a link-shaped cross section, on the outside of the portion.

In addition, the shim structure may include a simple rate having a relatively small area compared to the bead plate and having a plurality of holes having the same penetration area as the bore area.

In addition, the simplicity may extend in a flat plate shape from an outer portion of the hole portion to an outer layout of an initial area of the expansion portion through the bore edge portion and the full bead portion.

In addition, the shim structure may include a coating portion coated on only a partial surface of the simplate, which is a local area corresponding to the bore rim portion, and between the outer periphery of the hole portion and the starting position of the full bead portion.

In addition, in the core structure, a first thickness of the core structure obtained by combining the thickness of the coating portion and the thickness of the simplate may be formed relatively larger than the second thickness of the simplate not including the coating portion.

In addition, the coating part may be formed in any one of a circular ring shape, a butterfly wing shape, a symmetric shape, an overlapping shape, and a circular dotted line shape.

The head gasket having a shim stopper structure by a local coating unit according to the present invention has an effect of improving the sealing performance of the head gasket by adding a coating layer or a coating unit having a predetermined thickness locally on the simplicity of the shim stopper structure. .

In addition, according to the present invention, when a coating layer is applied locally on the simplicity of the shim stopper structure, the surface pressure rises due to the relative thickness difference at the coating area and head lift-off caused by the combustion gas pressure. The phenomenon can be reduced locally and very efficiently.

In addition, according to the present invention, by using the thickness of the coating applied locally compared to the conventional technology of implementing the thickness step of the stopper around the bore or combustion chamber by complexly applying different types of stoppers with different thicknesses, There is a cost reduction effect.

1 is a perspective view of a head gasket having a shim stopper structure by a local coating unit according to the present invention.
2 is an exploded perspective view of a head gasket having a shim stopper structure by a local coating unit shown in FIG. 1.
3 is a cross-sectional view taken along line AA shown in FIG. 1.
4 is a plan view of the shim stopper structure shown in FIG. 2.
5 is a cross-sectional view taken along line BB shown in FIG. 4.
6 is a plan view of a shim stopper structure for a head gasket according to an application example of the present invention.
7 is a cross-sectional view taken along line CC shown in FIG. 6.
8 is a plan view of a shim stopper structure for a head gasket according to another application example of the present invention.
9 is a cross-sectional view taken along the line DD shown in FIG. 8.
10 is a cross-sectional view taken along the line EE shown in FIG. 8.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art can easily implement the present invention. However, the present invention may be implemented in various different forms and is not limited to the embodiments described herein. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and similar reference numerals are attached to similar parts throughout the specification.

In the entire specification of the present invention, when a part includes a certain component, it means that other components may be further included rather than excluding other components unless specifically stated to the contrary.

In the drawings, FIG. 1 is a perspective view of a head gasket having a shim stopper structure by a local coating part according to the present invention, and FIG. 2 is a separation of the head gasket having a shim stopper structure by a local coating part shown in FIG. It is a perspective view. In addition, FIG. 3 is a cross-sectional view taken along line AA shown in FIG. 1, FIG. 4 is a plan view of the shim stopper structure shown in FIG. 2, and FIG. 5 is a cross-sectional view taken along line BB shown in FIG. 4. .

1 and 2, the head gasket 10 having a shim stopper structure by the local coating part of the present invention is formed in the engine piston part or combustion chamber with four large holes horizontally arranged based on the center position based on the drawing. It may be a corresponding bore area 11.

In addition, the wing-shaped portion around the bore region 11 may be a passage region 12 through which engine coolant is circulated.

In addition, the remaining hole regions 13 may be fastening holes for engine head bolts or circulation passages for engine oil.

These regions 11, 12, and 13 may be sealed by a full bead portion 202 or a half bead portion 204, which will be described later.

Here, the full bead unit 202 may mean a full bead or a corresponding portion in which the full bead is formed.

The full bead unit 202 may provide three airtight positions (eg, two bent positions and a bulging peak position between them).

The half bead unit 204 may mean a half bead or a corresponding portion in which the half bead is formed, but may provide two airtight positions (eg, two bent positions).

If, in the head gasket 10, the protruding or depressed shape part in relation to the regions 11, 12, 13 fails to maintain its normal shape, the engine oil may be mixed with coolant or engine oil may be mixed with the coolant. Either rises, coolant enters the cylinder and burns together when the engine is driven, engine oil spills into the cylinder and reduces engine oil, or the compression force of the piston enters the coolant line and excessive pressure is applied to the coolant line, causing the radiator or coolant pipe to rupture. Otherwise, the compression force of different cylinders can pass to the next cylinder and cause engine failure, which can cause many failures.

The head gasket 10 of the present invention capable of solving this problem may include a pair of bead plates 200 and 300 and a core structure 100 in order to maintain the normal function of the head gasket 10.

The bead plates 200 and 300 are interposed between a cylinder head and a cylinder block, not shown, to perform sealing, so as to correspond to a plurality of bore regions 11 of the cylinder block and an outer shape of the cylinder block. It is formed and may be stacked on each other based on the vertical direction of the cylinder block.

The core structure 100 may include a simple rate 110 and a coating unit 120.

The simplate 110 is interposed between the bead plates 200 and 300, and has a plurality of hole portions 130 formed to be spatially connected to correspond to the bore regions 11, respectively.

The coating unit 120 may be formed by applying a coating agent locally to the top or bottom surface (not shown) of the simplate 110 based on the edge of the hole unit 130.

That is, the shim structure 100 may refer to a shim stopper or a shim stopper plate interposed between the bead plates 200 and 300 and used.

The core structure 100 is formed by increasing the surface pressure and the combustion gas pressure through the simplerate 110 and the coating unit 120, 120a, 120b, 120c, and 120d serving as a shim stopper according to an embodiment to be described later or various application examples. It can play a role that can locally and very efficiently reduce the head lift-off phenomenon that occurs.

Here, the head lift-off phenomenon is caused by a high pressure generated in a series of engine operation processes including compression, expansion, explosion, and exhaust inside the engine, so that a strong force acts between the cylinder block and the cylinder head, so that the cylinder block and the cylinder block are temporarily It may mean a phenomenon in which a minute gap is formed fluidly between the cylinder heads.

The shim structure 100 of the present invention serves as a shim stopper by a step difference between the simprate 110 and the coating parts 120, 120a, 120b, 120c, and 120d, so that the full feed of the bead plates 200, 300 Excessive deformation of the 202 can be prevented, and sealing performance can be maximized by actively responding to the phenomenon of occurrence of the gap.

Referring to FIGS. 1 to 3, the bead plates 200 and 300 may have an area and shape that can be covered by wrapping or stacking upper and lower portions of the core structure 100.

The bead plates 200 and 300 are arranged along the direction toward the outer surface of the cylinder block with respect to the bore area 11 and formed integrally with a bore rim part 201, a full bead part 202, and an extension part. 203 and a half bead portion 204 may be included.

The bore rim portion 201 is an outer edge portion of the bore region 11 and may mean a flat plate portion extending along the circumferential direction of the bore.

The full bead part 202 is integrally formed on the outside of the bore border 201 and is bent upward or downward to have a semi-elliptical cross-sectional shape, and maintains airtightness by contacting the surface of the cylinder head or the surface of the cylinder block. It can mean a part to be.

The extended portion 203 may mean a flat portion extending from the outside of the full bead portion 202 to the half bead portion 204.

The half bead portion 204 may mean a portion bent to have a step difference, such as a link-shaped cross section, on the outside of the extended portion 203.

The half bead part 204 may also be a means for maintaining airtightness by being compressed according to the fastening of the engine head bolt between the cylinder head and the cylinder block on the same principle as the full bead part 202.

The core structure 100 has a relatively small area compared to the bead plates 200 and 300, and includes a simple rate 110 having a plurality of hole portions 130 having the same penetration area as the bore area 11. Includes.

The simplicity 110 of the core structure 100 passes from the outer edge of the hole portion 130 to the outer layout 111 of the entrance area of the extension portion 203 through the bore border portion 201 and the full bead portion 202. It includes a simple rate 110 extended in a flat plate shape (see FIG. 3).

In addition, the shim structure 100 is a localized area corresponding to the bore border 201, and the simplate 110 corresponding to the outer periphery of the hole part 130 and the starting position of the full bead part 202 It may include a coating unit 120 coated only on some surfaces.

In this way, the coating unit 120 may refer to a coating layer in which only a curved area is formed compared to the entire surface of the simplate 110.

Accordingly, the core structure 100 may be a stopper including a coating portion 120 having a predetermined thickness on the simplate 110 locally.

Meanwhile, in the process of manufacturing the core structure 100, the thickness of the coating unit 120 or the thickness t2 of the simplerate 120 may be implemented differently for each portion.

For example, referring to FIGS. 4 and 5, the core structure 100 includes the coating unit 120 and is the first of the core structure 100 in which the thickness of the coating unit 120 and the thickness of the simplate 110 are summed. The thickness t1 is formed relatively larger than the second thickness t2 of the simplerate 110 not including the coating part 120.

At this time, the coating part 120, which is a part applied in the form of a coating layer, may not be specified or distinguished as the upper or lower part of the core structure 100, and the application area and location of the coating part 120 may be relatively freely applied according to the design change. can be changed.

For example, the coating part 120 according to the embodiment is coated to have a circular ring shape by extending in the circumferential direction from the local surface of the simplate 110 corresponding to the outer periphery of the hole part 130 based on each hole part 130. Can be.

6 is a plan view of a shim stopper structure for a head gasket according to an application example of the present invention, and FIG. 7 is a cross-sectional view taken along line C-C shown in FIG. 6.

6 and 7, the coating portions 120a and 120b are symmetrical to each other with respect to the bore spacing portion 111 of the simplate 110 corresponding to between one hole portion 130a and the other hole portion 130b. It may be coated only on the arc portion of the arranged one hole portion (130a) and the arc portion of the other hole portion (130b). For example, the coating portions 120a and 120b may have a butterfly wing shape or a symmetric shape.

In this case, while removing the mutual interference or influence between the compression force of the piston of one bore region corresponding to one hole portion 130a and the compression force of the piston of the other bore region corresponding to the other hole portion 130b, the circular ring shape of the existing embodiment Compared to the coating unit 120, there is an advantage of reducing the amount of the coating agent used.

8 is a plan view of a shim stopper structure for a head gasket according to another application example of the present invention, FIG. 9 is a cross-sectional view taken along line DD shown in FIG. 8, and FIG. 10 is a line EE shown in FIG. It is a cut-away cross-sectional view.

8 and 9, the coating unit 120c is a coating agent is connected or merged with each other in the bore separation portion 111 of the simplate 110 corresponding to between one hole portion (130a) and the other hole portion (130b). It can have nested shapes created.

In this case, it is possible to increase the durability of the coating part 120c by performing the role of a dam to minimize the interaction between the compression force of the piston in one bore region and the compression force of the piston in the other bore region, and also the circular ring of the existing embodiment. Compared to the shaped coating unit 120, there is an advantage of reducing the amount of the coating agent used.

Referring to FIG. 10, the coating portion 120d may be formed in a circular dotted line shape along the circumferential direction of the hole portion 130a.

That is, in the simplate 110 of the core structure 100, a coated portion (eg, coated portion 120d) and an uncoated portion (eg, uncoated surface of the simplate 110) may be repeatedly arranged. have.

Therefore, compared to the circular ring-shaped coating part 120 mentioned in the previous embodiment, the amount of coating agent used can also be relatively reduced, and in particular, the contact area with the bead plate to be overlaid on the core structure 100 is relatively increased. There is an advantage of relatively increasing the stable intercalation performance.

Since the present invention as described above is not limited to the above-described embodiments, it is possible to change it within the scope of the scope of the present invention claimed in the claims, and such changes will fall within the scope of the described claims.

10: head gasket 100: shim stopper structure
110: simple rate 111: bore separation
112, 113: boring part 120, 120a, 120b, 120c, 120d: coating part
200, 300: bead plate 210: body
201: bore border 202: full bead
203: extension part 204: half bead part

Claims (7)

It is interposed between the cylinder head and the cylinder block to perform sealing, formed corresponding to the plurality of bore regions of the cylinder block and the outer shape of the cylinder block, and stacked with each other based on the vertical direction of the cylinder block A pair of bead plates; And
A coating agent is applied locally to the top or bottom surface of the simplate interposed between the bead plates and formed with a plurality of holes so as to be spatially connected to correspond to the bore regions, and the edge of the hole part. Head gasket having a shim stopper structure by a local coating portion including a core structure having a coating portion formed by doing so.
The method of claim 1,
The bead plate,
A bore border portion, which is a flat plate portion formed integrally and arranged along a direction toward the outer surface of the cylinder block with respect to the bore area;
A portion formed integrally from the outside of the bore border portion and bent upward or downward to have a semi-elliptical cross-sectional shape, and a full bead portion that contacts the surface of the cylinder head or the surface of the cylinder block to maintain airtightness;
An extended portion that is a flat portion extending from the outside of the full bead portion, and
A head gasket having a shim stopper structure by a local coating portion, characterized in that it comprises a half bead portion bent to have a step difference like a link-shaped cross section from the outside of the extension portion.
The method of claim 2,
The core structure,
A head gasket having a shim stopper structure by a local coating portion including a simplerate having a relatively small area compared to the bead plate and having a plurality of holes having the same penetration area as the bore area.
The method of claim 3,
The simplicity is,
A head gasket having a shim stopper structure by a local coating portion, characterized in that extending in a flat plate shape from an outer periphery of the hole portion to an outer layout of the entrance area of the expansion portion through the bore edge portion and the full bead portion.
The method of claim 3,
The core structure,
A shim by a localized coating unit, comprising a coating unit coated on only a partial surface of the simplate corresponding to a local area corresponding to the bore rim and between the outer periphery of the hole unit and the starting position of the full bead unit Head gasket with stopper structure.
The method of claim 5,
The core structure,
The shim stopper structure by a local coating, characterized in that the first thickness of the core structure, which is the sum of the thickness of the coating part and the thickness of the simprate, is formed relatively larger than the second thickness of the simplate not including the coating part. Head gasket having a.
The method of claim 1,
The coating portion head gasket having a shim stopper structure formed by a local coating portion formed in any one of a circular ring shape, a butterfly wing shape, a symmetric shape, an overlapping shape, and a circular dotted line shape.

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