KR20160120553A

KR20160120553A - Gasket having separating prevention portion

Info

Publication number: KR20160120553A
Application number: KR1020150049772A
Authority: KR
Inventors: 조승진
Original assignee: 동아공업 주식회사
Priority date: 2015-04-08
Filing date: 2015-04-08
Publication date: 2016-10-18
Also published as: KR101667763B1

Abstract

The present invention relates to a gasket having a separation preventing unit. The gasket interposed between a cylinder head cover and a cylinder head as a sealing means comprises: a body unit coming in contact with a surface of the cylinder head; and a pentangular separation preventing unit formed to be integrated with an upper side of the body unit. The pentangular separation preventing unit is configured to enable a pentangular groove of the cylinder head cover to be matched to the pentangular separation preventing unit to be inserted.

Description

[0001] GASKET HAVING SEPARATING PREVENTION PORTION [0002]

The present invention relates to a gasket having a release preventing portion, and more particularly, to a gasket having a release preventing portion used as a sealing means between a cylinder head cover and a cylinder head while preventing a gasket from being released.

In general, a gasket is sandwiched between a coupling surface or a contact surface between a component and a component passing through a fluid, a gas or the like in an engine (internal combustion engine), oil / air pressure apparatus, etc. to maintain airtightness therebetween to prevent leakage .

Among the gaskets, those applied to the engine portion of a vehicle or the like are provided between the joint surfaces of the cylinder block and the cylinder head, particularly between the contact surfaces of the cylinder head and the cylinder head cover, And prevents leakage of high-pressure combustion gas in the combustion chamber. The interior of the combustion chamber lies in a mechanical environment in which the internal pressure of the cylinder changes continuously during a four stroke cycle of compression, expansion, explosion, and venting.

In particular, existing gaskets provide basic functions as sealing or sealing means, but they can be used to more efficiently produce gaskets or to provide additional functions to the gaskets in various situations during factory automation production, management, storage and transport of gaskets Technology is being developed.

For example, Patent Document 1, which is the background of the invention, discloses a collapsing gasket.

In Patent Document 1, the anti-falling projection or the anti-falling projection is attached to the side surface of the gasket at regular intervals so that the gasket can perform the sealing function without being twisted or detached.

That is, as shown in FIG. 1, the gasket of Patent Document 1 is disadvantageous in that it requires a manufacturing process of attaching the anti-collapse projections 5 to both sides of the gasket 2.

Nevertheless, the grooves 3 of the cylinder head cover 1 are made of a quadrilateral structure by a smooth surface so that the gasket 2 can be engaged or inserted, so that further the collapsing projection 5 There arises a problem that when the assembly in which the gasket 2 is coupled to the groove 3 is conveyed to the next process, it is separated from the groove 3 having a quadrangular structure by a smooth plane.

On the other hand, also in Patent Document 2, since the groove 3 has the above-mentioned quadrangular structure, it can be released during the assembly of the gasket 2 or in the process of carrying it after the assembly.

That is, in the prior art, since the gasket 2 is simply inserted into the groove 3, the gasket 2 is assembled to the groove 3 of the cylinder head cover 1, , The gasket 2 is disengaged from the groove 3.

The gasket 2 can be ruptured by the rim of the groove 3 during the assembling process of the cylinder head 4 and the cylinder head cover 1. [ That is, the problem that the oil leaks at the damaged position may be continuously generated.

[Patent Literature]

(Patent Document 1) Registration Utility Model No. 20-0426468 (2006.09.07)

(Patent Document 2) Registration No. 20-0345161 (2004.03.05)

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems of the prior art, and it is an object of the present invention to provide a gasket having a pentagonal separation prevention part integrally formed on an upper side thereof, Preventing portion is formed on the cylinder head cover so as to prevent the gasket from being detached from the gasket during transportation or impact without using the detachment protrusion which is separately attached or coupled.

According to an aspect of the present invention, there is provided a gasket interposed as a sealing means between a cylinder head cover and a cylinder head, the gasket comprising: a body portion contacting a surface of the cylinder head; And a pentagonal separation prevention part integrally formed on the upper side of the body part, wherein the pentagonal separation prevention part is formed so that pentagonal grooves of the cylinder head cover can be fitted and inserted into each other. A gasket having a portion can be provided.

The pentagonal departure preventing portion may include a pair of lower inclined surfaces extending in an outer oblique direction from upper ends of both side surfaces of the body portion; And a pair of upper inclined surfaces extending in an inner inclined direction from the upper end of the lower inclined surface to meet with each other.

A rounded curved surface may be formed at a portion between the upper end of both side surfaces of the body portion and the lower end of the lower inclined surface and a portion between the upper end of the lower inclined surface and the lower end of the upper inclined surface, Respectively.

In addition, a portion between the upper end of the lower inclined surface and the lower end of the upper inclined surface protrudes outward from both sides of the body portion in the pentagonal departure preventing portion.

In addition, the pentagonal departure preventing portion and the body portion are taken out from a mold having a minus slope for molding the gasket, and then mounted on the section-forming jig. The portion between the upper end of both side surfaces of the body portion and the lower end of the lower inclined surface And an inner angle of a portion between the upper end of the lower inclined surface and the lower end of the upper inclined surface and a portion where the pair of upper inclined surfaces meet with each other is determined at a predetermined angle.

According to the gasket having the detachment preventing portion according to the aspect of the present invention, it is necessary to additionally engage or attach the separate escape projection to the gasket, since the shape of the pentagonal cross section can be formed in the gasket and the groove It is possible to increase the manufacturing efficiency while reducing the manufacturing cost of the gasket.

In addition, in the present invention, the pentagonal departure preventing portion of the gasket is integrally formed relatively large in comparison with the width of the body portion of the gasket, and the upper inclined surface of the pentagonal departure preventing portion can be used to smoothly engage the pentagonal groove There are advantages.

Further, since the gasket is compressed in a pentagonal groove, stress is generated in a relatively large number of places, and a relatively large contact area is provided. Therefore, the effect of increasing airtightness have.

1 is a cross-sectional view of a gasket and a groove according to the prior art;
FIG. 2 is a cross-sectional view of a gasket having a release preventing portion according to an embodiment of the present invention; FIG.
3 is a cross-sectional view of a cylinder head cover having a pentagonal groove for engaging with a gasket having the release preventing portion shown in Fig.
Fig. 4 is a sectional view for explaining an operating relationship in which the gasket shown in Fig. 2 is prevented from being separated from the pentagonal groove of the cylinder head cover shown in Fig. 3 by an external force. Fig.
Fig. 5 is a sectional view for explaining the assembly state between the gasket shown in Fig. 2 and the cylinder head cover and the cylinder head shown in Fig. 3;
6 is a sectional view for explaining a state in which compressive stress is applied to the gasket shown in Fig.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

2 is a cross-sectional view of a gasket having a release preventing portion according to an embodiment of the present invention.

Referring to FIG. 2, the present embodiment is a gasket having an escape preventing portion or an assembly or a set to which the gasket is coupled. The gasket includes a groove structure to be coupled between a cylinder head and a cylinder head cover .

Here, the gasket 100 having the release preventing portion or the gasket 100, which is abbreviated as the abbreviation, is manufactured in a ring structure corresponding to the shape of the use place. For example, a sealing means for sealing the gap between the cylinder head cover and the cylinder head, Lt; / RTI > That is, the gasket 100 may be a ring structure that extends along the rim of the cylinder head cover 10 and the cylinder head 20.

In addition, the groove structure refers to a pentagonal groove to be described below.

In the following description, the gasket 100 or the pentagonal groove will be described with reference to each cross section.

The gasket 100 serves as a sealing means and serves to prevent the gasket 100 from being easily separated by an external force that can be generated during gravity, assembly, and movement, unless it is deliberately pulled after being assembled into a groove of a pentagonal groove. In order to reliably demonstrate this role, the gasket 100 includes a body portion 110 and a pentagonal departure prevention portion 120.

The gasket 100 may be made of a material which can be elastically deformed in accordance with the gasket technical standard, that is, a general gasket material. For example, the gasket 100 may be made of any one material selected from rubber, synthetic resin, and metal, which is resiliently deformable in volume by a pressing force or an external force. The gasket 100 includes a body 110 and a pentagonal- And is integrally formed.

The body portion 110 of the gasket 100 is located in a gap between the cylinder head cover and the cylinder head, and contacts the surface of the cylinder head.

Here, the cylinder head cover and the cylinder head can be assembled through bolts not shown. The bolt is a fastening part that fixes the cylinder head cover and the cylinder head to each other while appropriately compressing the gasket 100.

The body portion 110 of the gasket 100 and the pentagonal departure preventing portion 120 may be pressed or elastically deformed by receiving a force corresponding to the fastening force of the bolt.

The body portion 110 of the gasket 100 has a bottom surface that contacts the surface of the cylinder head. Here, the body portion 110 is completely adhered to the surface of the cylinder head cover, that is, the bottom surface by the pressing force. Therefore, gas outflow from the inside of the cylinder head to the outside can be cut off by the gasket 100 having such a body portion 110.

The pentagonal separation preventing portion 120 of the gasket 100 is integrally formed on the upper side of the body portion 110.

Here, the pentagonal release preventing portions 120 and the pentagonal grooves of the cylinder head cover 10 shown in Fig. 3 are configured to be inserted into one another.

In addition, the pentagonal departure prevention portion 120 is formed with a pair of lower inclined surfaces extending in the outwardly inclined direction. The lower inclined surface 122 corresponds to a portion extending the width of the gasket 100 at the upper ends of both side surfaces 111 of the body portion 110 and may be a friction surface or a sealing surface.

The pentagonal departure preventing portion 120 is formed with a pair of upper inclined surfaces 124 extending inwardly from the upper end of the lower inclined surface 122 to meet with each other. The upper inclined surface 124 corresponds to a portion that reduces the cross-sectional width of the gasket 100, and may also be a friction surface or a sealing surface.

A portion between the upper ends of the side surfaces 111 of the body portion 110 and the lower end of the lower inclined surface 122 and the portion between the upper end of the lower inclined surface 122 and the lower end of the upper inclined surface 124, Round-shaped curved surfaces 121, 123, and 125 are formed at portions where the pair of upper inclined surfaces 124 meet with each other.

The rounded curved surfaces 121, 123, and 125 serve to suppress the occurrence of cracks in the bent or curved portions or to induce smooth assembly of the separation preventing portions 120 of the gaskets 100 and the pentagonal grooves I can take charge.

A portion between the upper end of the lower inclined surface 122 and the lower end of the upper inclined surface 124 protrudes outward from both side surfaces 111 of the body 110 in the pentagonal departure preventing portion 120.

Therefore, in the pentagonal departure prevention part 120, the lower inclined surface 122 can play a role as a catching jaw of a kind of inclined structure in relation to the pentagonal groove to be described in detail with reference to FIG.

The pentagonal departure prevention part 120 and the body part 110 may be formed to have a recessed slope for molding the gasket 100. In this case, (Not shown) or a mold apparatus.

The pentagonal departure prevention part 120 and the body part 110 are taken out of the mold and then mounted on a section forming jig (not shown). Here, the section-forming jig may mean a manufacturing means for molding the base material for the gasket 100 taken out from the mold as shown in the cross-section shown in Fig.

In other words, the pentagonal departure preventing portion 120 and the body portion 110 can be separated from each other by a gap between the upper side of both side surfaces 111 of the body portion 110 and the lower side of the lower side slope 122, And the inner angle R1, R2, R3 of the portion between the upper end of the lower inclined surface 122 and the lower end of the upper inclined surface 124 and the portion where the pair of upper inclined surfaces 124 meet with each other, The gasket 100 can be precisely defined by the angle, and the manufacturing quality control of the gasket 100 can be facilitated, such as assembly tolerance.

The inner angles R1, R2, and R3 may differ depending on the cross-sectional shape of the pentagonal departure-avoiding portion 120. By way of example, the first interior angle R1 may be an angle of 162 degrees and the other interior angles R2 and R3 may be an angle of 108 degrees.

3 is a cross-sectional view of a cylinder head cover having a pentagonal groove for engaging with a gasket having the release preventing portion shown in Fig.

3, a groove structure for a gasket having a release preventing portion is provided for assembling the gasket 100 interposed as a sealing means between the cylinder head cover 10 and the cylinder head 20 shown in FIG. 5 And a pentagonal groove 200 formed in the cylinder head cover 10.

That is, the pentagonal groove 200 having a pentagonal groove cross-sectional shape is formed on the bottom surface of the cylinder head cover 10 so as to be compatible with each other when assembling the pentagonal departure preventing portion 120 described with reference to FIG.

The cross-sectional shape of the pentagonal groove 200 may be formed to be bilaterally symmetrical.

The pentagonal groove 200 serves to prevent the gasket 100 having the pentagonal departure preventing portion 120 from being easily released from the pentagonal groove 200 even during transportation or impact.

To this end, the pentagonal groove 200 is formed with a lower inclined groove surface 220 parallel to the lower inclined surfaces of the pair of pentagonal departure preventing portions extending from the upper ends of both sides of the body portion in the outer inclination direction .

The pentagonal groove 200 is formed with an upper inclined groove surface 240 parallel to the upper inclined surfaces of the pair of pentagonal departure preventing portions extending inwardly from the upper end of the lower inclined surface and facing each other have.

Fig. 4 is a cross-sectional view for explaining an operating relationship in which the gasket shown in Fig. 2 is prevented from being separated from the pentagonal groove of the cylinder head cover shown in Fig. 3 by an external force.

4, when the pentagonal departure prevention part 120 of the gasket 100 is assembled to the hexagonal groove 200 by a manual or automated assembly device, an unexpected external force (e.g., impact, gravity, etc.) F of the gasket 100 can be prevented from being released.

3, a rounded entrance curved surface 210 is formed at an entrance edge where the lower inclined groove surface 220 of the pentagonal groove 200 meets the bottom surface 11 of the cylinder head cover.

The rounded inlet curved surface 210 serves to prevent an excessive stress from being formed at the contact point of the pentagonal departure preventing portion 120 when the pentagonal departure preventing portion 120 of the gasket 100 is inserted, It plays a role of inducing the assembly smoothly.

A boundary portion between the lower inclined groove surface 220 of the pentagonal groove 200 and the upper inclined groove surface 240 and a boundary portion between the one upper inclined groove surface 240 and the other upper inclined groove surface are rounded Groove curved surfaces 230 and 250 are formed.

The rounded groove curved surfaces 230 and 250 play a role of increasing the contact area relative to the flat surface in relation to the pentagonal departure preventing portion of the gasket, thereby enhancing the sealing efficiency.

FIG. 5 is a cross-sectional view for explaining the assembled state between the gasket shown in FIG. 2, the cylinder head cover and the cylinder head shown in FIG. 3, FIG. 6 is a view for explaining a state in which compressive stress is applied to the gasket shown in FIG. Sectional view.

5, the lower inclined groove surface 220 and the upper inclined groove surface 240 of the pentagonal groove 200 are formed on the lower inclined surface 122 of the pentagonal departure prevention portion 120 of the gasket 100, A predetermined gap P is formed with respect to the upper inclined surface 124 of the pentagonal departure preventing portion 120 so that the coupling between the pentagonal groove 200 and the pentagonal departure preventing portion 120 is smoothly performed .

When the cylinder head cover 10 and the cylinder head 20 are assembled through the bolts not shown, the pentagonal groove 200 and the pentagonal departure preventing portion 120 are connected to each other As a result, the clearance P is eliminated, and a reliable sealing performance can be exhibited.

In addition, even if the gasket 100 itself receives a force to collapse due to some reason, or a phenomenon of collapse occurs, and thus the rotation moment is caught by the gasket 100, the lower inclined groove surface 220 and the upper inclined groove surface 240 can be a plurality of supporting surfaces for supporting the rotational moment. Therefore, the pentagonal groove 200 can also prevent the gasket 100 from falling down.

Referring to FIG. 6, when the bolt is completely tightened, the gasket 100 undergoes elastic deformation due to compression. In particular, stress can be generated at three places as shown by the dotted circle in Fig. Stresses may be generated at two inner corners of a groove of a quadrangular structure in a conventional gasket and a quadrilateral structure, but in the present embodiment, stress is generated at three relatively large portions in comparison with the above two portions, It can be seen that the sealing performance can be relatively improved as compared with the gasket of the prior art because it provides a large contact area.

As described above, in the present embodiment, since the pentagonal departure preventing portions 120 of the gaskets 100 are assembled to the pentagonal grooves 200, they do not need separate escape preventing protrusions, It is possible to solve the problem of the gasket chewing breakage occurring in the process of assembling the cylinder head 20 and the cylinder head cover 10 and to solve the problem of oil leakage at the breakage position have.

10: cylinder head cover 20: cylinder head
100: gasket 110:
120: 5 angle separation preventing part 200: pentagonal groove

Claims

A gasket interposed as a sealing means between a cylinder head cover and a cylinder head,
The gasket
A body portion contacting the surface of the cylinder head; And
And a pentagonal separation preventing part integrally formed on the upper side of the body part,
Wherein the pentagonal release preventing portion is configured such that the pentagonal grooves of the cylinder head cover can be inserted into one another.

The method according to claim 1,
In the pentagonal departure preventing portion,
A pair of lower inclined surfaces extending in an outer oblique direction from upper ends of both side surfaces of the body portion; And a pair of upper inclined surfaces extending in an inner inclined direction from the upper end of the lower inclined surface to meet with each other.

3. The method of claim 2,
A rounded curved surface is formed at a portion between the upper end of both side surfaces of the body portion and the lower end of the lower inclined surface and a portion between the upper end of the lower inclined surface and the lower end of the upper inclined surface, Wherein the gasket has an escape preventing portion.

The method of claim 3,
Wherein a portion between the upper end of the lower inclined surface and the lower end of the upper inclined surface protrudes outward from both sides of the body portion in the pentagonal departure preventing portion.

The method of claim 3,
Wherein the pentagonal departure preventing portion and the body portion are taken out from a mold having a minus slope for forming the gasket and then mounted on the section forming jig and are positioned between the upper end of both side surfaces of the body portion and the lower end of the lower inclined surface, Wherein an inner angle of a portion between an upper end of the lower inclined surface and a lower end of the upper inclined surface and a portion where the pair of upper inclined surfaces meet with each other is determined at a predetermined angle.