KR101712663B1 - Oil groove - Google Patents

Abstract

According to the present invention, there is provided an oil groove structure for maintaining airtightness, wherein a groove is formed along a wall on at least one surface of the inner surface and the outer surface of the cylinder and the ring and the packing is fitted to the upper side of the groove, And the oil groove may be formed in a spiral shape along the surface.

Description

Oil groove structure for maintaining airtightness {OIL GROOVE}

The present invention relates to an oil groove structure for maintaining airtightness.

The present invention relates to an oil groove structure for maintaining airtightness. Conventionally, a rubber packing is used to make a head or a cover of a cylinder. Such a rubber packing is designed so that a rubber packing is put in a place where leakage is expected, The rubber packing played a role.

Korean Utility Model Laid-Open No. 20-1997-0041097 discloses that a gasket is inserted between a cylinder head and a cylinder cover in order to maintain airtightness or watertightness, and the gasket is tightened with a bolt to fix the leakage preventing member to the inside of the cylinder head So that the engine oil does not come into direct contact with the gasket and the fixing bolt. However, since the gasket is further inserted between the cylinder head and the cover and fixed with the bolt, even though the gasket is made of a metal material and thus has a higher durability than the O-ring, the three parts of the head- Therefore, as the number of components increases, the contact area between the component and the component becomes large, and the airtightness tends to deteriorate.

Korean Unexamined Patent Application Publication No. 10-2010-0023592 discloses a structure in which an inclined surface is formed on a coupling surface between a head and a cover of a cylinder so that the head and the cover are directly contacted and joined by pressing with a bolt. However, the above-mentioned patent also has a disadvantage that it must be coupled by a bolt, and it is disadvantageous in that it can not be used in a portion that can not be coupled with a bolt.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a structure for preventing leakage of oil through a wall surface of a cylinder, a head, or the like, in order to overcome such disadvantages.

In order to overcome the above-mentioned problems, an oil groove structure for maintaining airtightness is provided. In the oil groove structure, grooves are formed along the wall on at least one surface of the inner and outer surfaces of the cylinder and ring, the packing is fitted to the upper side of the groove, So that the packing is expanded by the oil to improve the airtightness.

 The oil groove may be formed in a spiral shape along the surface.

The oil inlet of the oil groove may be formed such that the groove of a small width is gradually enlarged and the depth of the oil inlet is gradually increased so that the oil is naturally introduced.

 The opposite end of the oil groove, not the inlet, may be clogged.

 A spiral oil groove may be formed on the inner and outer surfaces of the ring and the end of the oil groove formed on the outer surface and the end of the oil groove formed on the inner surface may be connected through the inside of the ring.

With the above-described structure, the oil groove having high airtightness is provided.

1 to 5 show an embodiment according to the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. 1 to 5 are diagrams showing an embodiment according to the present invention. Conventional oil rings and rubber seals have been used to form grooves and fit into grooves. Conventional packing or oil rings have been used to maintain airtightness where parts and components meet. However, there was no other way but to increase the airtightness by adjusting the material and properties of the oil ring if it had to be kept to a higher degree of airtightness.

The ring shown in Figs. 1 to 5 has grooves on the inner or outer surface of the ring. The grooves on the inner surface and the outer surface are grooves for guiding the oil, and oil may be introduced where the ring is used. Oil may be injected.

The oil groove 11 may be formed either inside or outside the ring, or may be formed only on the outer surface of the cylinder in the case of a cylinder other than a ring.

 When the oil is injected into the oil groove in the state where the packing is inserted into the oil groove 11, the packing is expanded by the oil passing through the oil groove 11, and the airtightness by the packing is further increased.

The airtightness due to the expansion of the packing can be finely adjusted to the extent that it is difficult to control the size of the packing, but the airtightness can be improved to a great extent.

Conventionally, grooves formed on the inner and outer portions of rings and cylinders are often circular. However, in the present invention, in order to form an oil groove and allow oil to flow to expand the packing attached to the oil groove, all the oil grooves are connected . 4 and 5, the oil groove is formed in a spiral shape inside or outside the ring so that the oil can continue to flow along the oil groove.

However, the other outlet, not the inlet of the oil groove, may be clogged because the direction of the oil flowing through the oil groove may change continuously as the ring or piston moves, It is sufficient if there is no oil flow.

In the case of a ring shape, the oil groove is preferably spiral or circular in order to ensure airtightness along the surface, but any shape may be used.

Accordingly, the inlet and outlet of the oil groove may be formed in the same direction, so that the oil that has entered the oil groove may flow through the oil groove again and then enter again.

Or a spiral oil groove may be formed in the inner and outer portions of the ring shape, and the end portions may pass through the ring to form a passage through which the oil can pass. In this case, the upper part of the passage through which the oil passes is clogged by the oiling or packing, so that the airtightness does not occur. However, since the oil passes through the inside and the outside, the inlet and outlet of the oil can be formed in the same direction.

 Generally, even if the packing is manufactured according to the standard, since the packing does not inflate in order to put the packing in place for practical use, the packing should be manufactured according to the size of the groove into which the packing is inserted. That is, in order to fit the packing into the groove, the size of the packing with respect to the groove must be determined. Otherwise, a different shape of packing must be manufactured.

However, when the oil is inflated along the oil groove to inflate the packing, the packing is inflated after the packing is inserted into the groove, so that the airtightness of the packing can be further improved than the original specification.

The oil groove may have a spiral shape as shown in FIG. 4, and may be formed on the outer side rather than on the inner side of the ring or the cylinder, if necessary. However, it is better to form the packing so that it does not suddenly bend.

In order to allow the oil to flow naturally into the oil groove, it is preferable that the inlet portion of the oil groove is formed so that the width of the groove is slightly reduced. In the oil groove of the ring shown in Fig. 5, the groove which looks like a thin groove gradually increases in width to become the same as the width of the oil groove of the other portion. In this way, the oil inlet can be made in such a manner .

11: Oil groove
12: Oil inlet

Claims (5)

As an oil groove structure for maintaining airtightness,
On the surface of at least one of the inner and outer surfaces of the cylinder and the ring
The groove is formed along the wall, the packing is fitted to the upper side of the groove, the oil flows to the inside of the groove, and the packing is expanded by the oil to increase the airtightness,
The oil groove is formed in a spiral shape along the surface
The oil inlet of the oil groove is formed in such a shape that the minute width groove gradually expands and the depth gradually increases so that the oil is naturally drawn in,
Characterized in that the opposite end of the oil groove, not the inlet, is of a clogged shape.
delete delete delete The airtight container according to claim 1, characterized in that a helical oil groove is formed on the inner and outer surfaces of the ring and the end of the oil groove formed on the outer flat surface of the oil groove formed on the inner surface is connected through the inside of the ring An oil groove structure

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