JP2015004276A - Gasket - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gasket which can watertightly block a cooling water pore of a cylinder head and a cooling water pore of a cylinder block and also prevents a rubber from separating from a core metal.SOLUTION: The gasket comprises a core metal (22) made of a metal, and a rubber (23). The gasket is disposed in a region between a water pore (11wg) of a cylinder block (11) and a water pore (12wg) of a cylinder head (12), and positioned to block a flow of cooling water from the water pore (11wg) of the cylinder block toward the water pore (12wg) of the cylinder head.

Description

  The present invention relates to a gasket that is interposed between a cylinder block and a cylinder head to prevent leakage of cooling water.

Conventionally, all the cooling water holes in the cylinder block communicate with the cooling water holes in the cylinder head, and the cooling water holes in the cylinder head and the cooling water holes in the cylinder block have not been shut off with a gasket.
On the other hand, as a result of various studies, the inventor has not made all the cooling water holes of the cylinder block communicate with the cooling water holes of the cylinder head, and only the cooling water holes of some cylinder blocks correspond to the cooling water holes of the cylinder head. The structure that prevents the cooling water holes of the remaining cylinder blocks from communicating with the cooling water holes of the cylinder head has been developed.
Such a structure is novel, and the cooling water can flow into the cooling water hole in the cylinder head in a state of having sufficient kinetic energy, and can circulate efficiently in the cylinder head.

FIG. 9 shows a cross section of the main part of the gasket used at a location where the cooling water hole of the cylinder block does not communicate with the cooling water hole of the cylinder head. In FIG. 9, the gasket (cylinder head gasket) 20J blocks the cooling water hole 11wg formed in the cylinder block 11 and the cooling water hole 12wg formed in the cylinder head 12 communicating with the water passage 11wg.
The gasket 20J is composed of two upper and lower gasket bodies 21, a core metal 22J, and two upper and lower rubber members 23J.
The two upper and lower rubber members 23J have the same shape, and are attached to both the front and back surfaces of the cored bar 22J with a heat-resistant adhesive, for example. The edge of the cored bar 22J is sandwiched between two upper and lower gasket bodies (gasket plates) 21.
FIG. 10 shows the planar shape of the gasket 20J shown in FIG. 9, the AA cross section of the gasket 20J is shown in FIG. 11, the BB cross section is shown in FIG. A cross section C is shown in FIG.

As described above, the gasket 20J shown in FIGS. 9 to 13 may be used in a place where the cooling water hole of the cylinder block does not communicate with the cooling water hole of the cylinder head.
And, in the place where the cooling water hole of the cylinder block does not communicate with the cooling water hole of the cylinder head, the cylinder head gasket 20J must block the cooling water hole 12wg of the cylinder head and the cooling water hole 11wg of the cylinder block in a watertight manner. I must.

However, in the gasket 20J having the above-described structure shown in FIGS. 9 to 13, the rubber member 23J is simply attached to both the front and back surfaces of the cored bar 22J with a heat-resistant adhesive. Therefore, for example, when engine disassembly and maintenance are repeated a plurality of times, when the gasket 20J is removed from the upper surface of the cylinder block 11 when the engine is newly disassembled, the gasket 20J is fixed to the upper surface of the cylinder block 11. Then, the rubber member 23J may be deviated from the cored bar 22J, the edge of the rubber member may be rolled up, or may be deformed.
When the rubber member 23J is deviated from the metal core 22J and the edge of the rubber member is rolled up or deformed, the cylinder head 11 is connected to the cylinder block 11 when the engine is assembled after the engine has been disassembled. At this time, there is a problem that the water tightness in the cooling water hole 12wg of the cylinder head and the cooling water hole 11wg of the cylinder block is impaired.
Further, when the adhesive loses its effect for some reason during transportation of the gasket, the rubber is deformed or dropped off.

In another prior art, a gasket having a stainless steel seal plate and a gasket body has been disclosed (see Patent Document 1), which is used to isolate the cooling water passage from the outside in a watertight manner. The cooling water holes of the cylinder block and the cooling water holes of the cylinder block are not shut off in a watertight manner.
A gasket having a laminated structure has also been proposed (see Patent Document 2). The purpose is to replenish tightening distortion around the cylinder bore and prevent combustion gas from being blown out. It does not block water holes tightly.

JP 2000-346198 A JP 2001-227410 A

  The present invention has been proposed in view of the above-described problems of the prior art, and is capable of watertightly blocking the cooling water hole of the cylinder head and the cooling water hole of the cylinder block, and the rubber is made from the cored bar. The purpose is to provide a gasket that does not come off.

The gasket (20) of the present invention includes a metal core (22) and a rubber (23), and is located between a water hole (11 wg) of the cylinder block (11) and a water hole (12 wg) of the cylinder head (12). And is provided at a position where the flow of cooling water from the water hole (11wg) of the cylinder block to the water hole (12wg) of the cylinder head is blocked.
The gasket (20) of the present invention is not partially connected to the water hole (11wg) of the cylinder block (11) and the water hole (12wg) of the cylinder head (12) at the corresponding position. It is an engine of the type that only communicates with the engine, and the water hole (12wg) of the cylinder head (12) located at a position corresponding to the water hole (11wg) of the cylinder block (11) is arranged at a place where it does not communicate. preferable.

  In the present invention, a through hole (220) is formed in the cored bar (22), covers the through hole (220) from the front side and the back side of the cored bar (22), and is filled in the through hole (220). A rubber (23) is preferably arranged.

Alternatively, the core metal is divided into a radially inner region (Ei) and a radially outer region (Eo) (when the center of the water hole is the radial center),
The rubber (23A) includes a cored bar (22B) in the radially outer region (Eo) and a front side and a back side of the radially outer edge (221A) in the radially inner region (Ei) of the cored bar (22A). The gap between the core metal (22A) in the radially inner region (Ei) and the metal core (22B) in the radially outer region (Eo) is covered with the front side and the back side of the radially inner edge (221B) The portion (δ) is preferably filled.
At that time, the rubber (23A) at the radially inner edge (221B) of the cored bar (22B) in the radially outer region (Eo) is disposed so as to surround the water holes (11wg, 12wg). It is preferable.

According to the present invention having the above-described configuration, the cylinder head is disposed in a region between the water hole (11 wg) of the cylinder block and the water hole (12 wg) of the cylinder head. Since the cooling water flow toward the water hole (12 wg) of the cylinder head is provided at a position where the flow of the cooling water is blocked, the cooling water hole (12 wg) of the cylinder head and the cooling water hole (11 wg) of the cylinder block can be shut off in a watertight manner. .
And since the gasket (20) of this invention is equipped with the metal metal core (22) and the rubber (23), the boundary part of a cylinder block (11) and a cylinder head (12) with the said rubber (23). The cooling water is prevented from leaking from the water.

  And if a gasket (20) is arrange | positioned in the area | region between the water hole (11wg) of a cylinder block (11), and the water hole (12wg) of a cylinder head (12), the water hole (11wg) of a cylinder block (11) will be described. ) From the coolant head toward the water hole (12 wg) of the cylinder head (12). As a result, in the place where the gasket (20) is not arranged, the cooling water flowing through the cooling water hole (11wg) of the cylinder block (11) is in the cooling water hole (12wg) of the cylinder head (12) (conventional technology). In comparison with (1), it flows vigorously at a high flow rate, and the cooling water circulates efficiently in the cooling water holes (12 wg) of the cylinder head (12).

A through hole (220) is formed in the core metal (22), and the rubber (23) is formed so as to cover the through hole (220) from the front side and the back side of the core metal (22) and fill the through hole (220). ), The rubber that covers the front side of the cored bar (22), the rubber that covers the back side of the cored bar, and the rubber filled in the through hole are integrated, so that they are integrally coupled to the cored bar (22). Is done.
Therefore, the rubber (23) is prevented from coming off from the core metal (22).

  Furthermore, the core metal (22) is divided into a plurality of parts, and the core metal (22A) in the radial inner edge (221B) and the inner radial area (Ei) in the core metal (22B) in the radially outer (Eo) area. If the rubber (23A) is arranged so as to surround the water holes (11wg, 12wg) in the region between the radially outer edges (221A) in FIG. There is no core metal (22A, 22B) between the cylinder block (11) and the cylinder head (12) over the entire circumference, and there is only rubber (23A), so rubber compression is performed over the entire circumference of the seal surface. The rate is stable.

It is sectional drawing which shows the state which has arrange | positioned the gasket which concerns on 1st Embodiment of this invention so that the water hole of a cylinder block and the water hole of a cylinder head may be plugged up. It is a top view of the gasket concerning a 1st embodiment. It is a top view of the metal core which comprises the gasket which concerns on 1st Embodiment. It is AA arrow sectional drawing in FIG. It is a BB arrow sectional view in FIG. It is CC sectional view taken on the line in FIG. It is a top view of the gasket which concerns on 2nd Embodiment of this invention, Comprising: It is the figure which abbreviate | omitted the gasket main body (gasket plate). It is XX arrow sectional drawing in FIG. It is sectional drawing which has arrange | positioned the gasket by a prior art so that the water hole of a cylinder block and the water hole of a cylinder head may be plugged up. It is the top view of the gasket by a prior art, and is the figure which abbreviate | omitted the gasket main body (gasket plate). It is AA arrow sectional drawing in FIG. It is BB arrow sectional drawing in FIG. It is CC sectional view taken on the line in FIG.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
First, based on FIGS. 1-6, 1st Embodiment of this invention is described.
The gasket 20 according to the first embodiment is a type in which the water holes 11wg of the cylinder block 11 and the water holes 12wg of the cylinder head 12 at the corresponding positions do not communicate with each other but only a part thereof communicates. Has been applied to the engine. And it arrange | positions in the location which does not connect the water hole 11wg of the cylinder block 11, and the water hole 12wg of the cylinder head 12 in a corresponding position.

1 and 2, the gasket 20 of the first embodiment is composed of two upper and lower gasket bodies 21 (gasket plates), a cored bar 22, and a rubber member 23. Here, in FIG. 2, illustration of the gasket main body 21 is omitted.
As shown in FIG. 3, the cored bar 22 has through-holes 220 formed at a plurality of locations (eight locations in the drawing) where the rubber member 23 is disposed.

  The rubber member 23 has a front side (for example, an upper side in FIG. 1 and a viewer side with respect to the paper surface in FIG. 2) and a back side (for example, a lower side in FIG. 1 and a viewer with respect to the paper surface in FIG. 2). The through hole 220 is covered from the opposite side and filled in the through hole 220, and the front side and the back side of the cored bar 22 are integrally arranged. In other words, as shown in FIG. 6, the rubber member 23 is integrally and continuously disposed on the front and back of the core bar 22 through the through hole 220 of the core bar 22.

As is clear from FIG. 1, the gasket 20 according to the first embodiment is disposed in a region between the water hole 11 wg of the cylinder block 11 and the water hole 12 wg of the cylinder head 12, and the water hole 11 wg of the cylinder block 11. Since the cooling water flow toward the water hole 12wg of the cylinder head 12 is cut off, the cooling water hole 12wg of the cylinder head 12 and the cooling water hole 11wg of the cylinder block 11 can be blocked in a watertight manner. .
Therefore, the cooling water flowing through the cooling water hole 11 wg of the cylinder block 11 does not flow into the cooling water hole 12 wg of the cylinder head 12 at the location where the gasket 20 is disposed. Therefore, in the place where the gasket 20 is not disposed, the cooling water flowing through the cooling water hole 11wg of the cylinder block 11 flows vigorously in the cooling water hole 12wg of the cylinder head 12 at a high flow rate, and the cooling of the cylinder head 12 is performed. Cooling water circulates efficiently in the water hole 12wg.

  And since the gasket 20 which concerns on 1st Embodiment is equipped with the metal metal cores 22 and the rubber | gum 23, a cooling water may leak from the boundary part of the cylinder block 11 and the cylinder head 12 with the said rubber | gum 23. FIG. Is prevented.

Further, since the through hole 220 is formed in the core metal 22, and the rubber 23 is disposed so as to cover the through hole 220 from the front side and the back side of the core metal 22 and to be filled in the through hole 220, the core metal The rubber 23 covering the front side of 22, the rubber 23 covering the back side of the cored bar 22, and the rubber 23 filled in the through-hole 220 are united, and are coupled to the cored bar 22 side by side.
Therefore, the rubber 23 is firmly coupled to the cored bar 22, and the rubber 23 is prevented from being detached from the cored bar 22.

Next, based on FIG.7 and FIG.8, 2nd Embodiment of this invention is described.
7 and 8, the gasket according to the second embodiment is generally indicated by reference numeral 20A.
When the center of the water holes 11wg and 12wg (see FIG. 8) is the center in the radial direction, the gasket 20A according to the second embodiment includes a cored bar 22 having a region 22A on the radially inner side Ei and a region on the radially outer side Eo. It is divided into 22B.

The rubber member 23A has a front side (for example, the upper side in FIG. 8, the viewer side with respect to the paper surface in FIG. 7) and a back side (for example, FIG. 8) of the core metal 22A in the region of the radially inner side Ei. In FIG. 7, the front side and the back side of the radially inner edge 221B of the cored bar 22B in the radially outer region are covered.
At the same time, the rubber member 23A is filled in the gap portion δ. The gap portion δ is a space between the core metal 22A in the radially inner region and the core metal 22B in the radially outer region.
As a result, the rubber 23A is disposed so as to surround the water holes 11wg and 12wg. More specifically, in the region between the radially inner edge 221B of the core bar 22B on the radially outer side Eo and the radially outer edge 221A of the core bar 22A of the radially inner Ei, the rubber 23A is connected to the cylinder block 11. Between the cylinder head 12 and the cylinder head 12, the water holes 11wg and 12wg are surrounded over the entire circumference in a state where the core metal 22A and the core metal 22B do not exist.

  Therefore, sealing with only the rubber 23A is possible over the entire circumference of the sealing surface, and the rubber compression rate is stabilized over the entire circumference.

  It should be noted that the illustrated embodiment is merely an example, and is not a description to limit the technical scope of the present invention.

DESCRIPTION OF SYMBOLS 11 ... Cylinder block 12 ... Cylinder head 20 ... Gasket 21 ... Gasket body / gasket plate 22 ... Core metal 23 ... Rubber member 220 ... Through-hole

Claims (3)

  It is equipped with a metal core and rubber, and is arranged in the area between the water hole of the cylinder block and the water hole of the cylinder head, blocking the flow of cooling water from the water hole of the cylinder block to the water hole of the cylinder head The gasket characterized by being provided in the position to do.   The gasket according to claim 1, wherein a through hole is formed in the core metal, and a rubber is disposed so as to cover the through hole from the front side and the back side of the core metal and fill the through hole. The core bar is divided into a radially inner area and a radially outer area,
The rubber covers the front side and the back side of the radially outer edge of the core metal in the radially inner region and the front side and the back side of the radially inner edge of the core metal in the radially outer region, and is a radially inner region. The gasket of Claim 1 with which the clearance gap between the core metal and the core metal of the area | region of a radial direction outer side is filled.

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