JP4783606B2 - Laminated metal gasket for cylinder head - Google Patents

Description

  The present invention relates to a cylinder head metal gasket interposed between a cylinder block and a cylinder head of an internal combustion engine, and more particularly to a laminated metal gasket in which a plurality of metal plates are stacked.

  As this type of metal gasket, for example, the one described in Patent Document 1 previously filed by the applicant of the present application and obtained a patent is known. Each cylinder head metal gasket is composed of a metal plate, and is an internal combustion engine. A plurality of cylinder holes formed respectively corresponding to a plurality of cylinder bores of a cylinder block to which the cylinder head is assembled, an annular bead having an angled cross section formed around each of the plurality of cylinder holes, and the cylinder Corresponding to the cooling water jacket of the block and the cooling water hole of the cylinder head, the cooling water hole formed in the outer peripheral portion of each annular bead, and the position surrounding the annular bead and the cooling water hole as a whole Two substrates having an outer peripheral bead having a single bevel-shaped cross section formed are provided. A thin step adjustment plate made of a metal plate is interposed between the substrates.

The step adjustment plate is made of a metal plate, and is formed of an outer step adjustment plate that extends from the position of the cooling water jacket to the position of the outer peripheral edge of the substrate, and a metal plate that is thicker than the outer step adjustment plate. A plurality of cylinder holes formed respectively corresponding to the plurality of cylinder holes, and an inner step adjusting plate that extends from the position of the inner peripheral edge of the cylinder holes to the position of the cooling water jacket. Butted at the position of the water jacket and joined together by laser welding to form a single plate, which is added to the annular bead of the substrate by the difference in plate thickness between the outer step adjustment plate and the inner step adjustment plate The surface pressure is increased to improve the sealing performance against the combustion gas in the cylinder bore.
Japanese Patent No. 2925920, FIG.

  By the way, as a result of the inventor of the present application promoting research on the conventional metal gasket, in the conventional metal gasket, when the outer step adjustment plate and the inner step adjustment plate are joined by laser welding, It has been found that there is an inconvenience that high-precision positioning and laser welding over a relatively long distance take time and increase the manufacturing cost.

The present invention has an object to advantageously solve the above-mentioned problems, and the cylinder-type laminated metal gasket according to the first aspect of the present invention is made of a metal plate and is assembled with a cylinder head of an internal combustion engine. A plurality of cylinder holes formed respectively corresponding to a plurality of cylinder bores of the cylinder block, an annular bead having an angled cross section formed around each of the plurality of cylinder holes, and a cooling water jacket for the cylinder block And a cooling water hole formed in the outer peripheral portion of each annular bead corresponding to the cooling water hole of the cylinder head, and a single slope formed at a position surrounding the annular bead and the cooling water hole as a whole Two substrates having outer peripheral beads having a cross-sectional shape, the annular beads are mutually in the thickness direction of the gasket In the cylinder-type laminated metal gasket for stacking and being arranged so as to be arranged in rows, an outer step adjustment plate made of a metal plate and extending from the position of the cooling water jacket to the position of the outer peripheral edge of the substrate, The cooling water is formed from a metal plate thicker than the outer step adjustment plate, and has a plurality of cylinder holes respectively formed corresponding to the plurality of cylinder holes of the substrate. A position corresponding to a position between the cylinder holes adjacent to each other on the substrate. A fixing means is provided on a side of the inner step adjusting plate in a direction perpendicular to the alignment direction of the plurality of cylinder holes with respect to the cylinder holes of the substrate. Provided fixing means at the position corresponding to the location, it is characterized in that it has fixed only on one of the two substrates by each said fixing means and said outer step adjustment plate and said inner step adjustment plate .

  According to a second aspect of the present invention, in the multilayer metal gasket for a cylinder head according to the present invention, the outer step adjusting plate and the inner step adjusting plate are fixed to one of the two substrates by the fixing means. Further, the outer step adjustment plate is fixed to one of the two substrates by the fixing means, and the inner step adjustment plate is fixed to the other substrate of the two substrates by the fixing means. It is characterized by being fixed.

  Further, in the laminated metal gasket for a cylinder head according to the third aspect of the present invention, a fixing means is provided at a position corresponding to a position between the cylinder holes adjacent to each other on the outer step adjusting plate. Instead of providing a fixing means at a position corresponding to a lateral position in a direction orthogonal to the alignment direction of the plurality of cylinder holes with respect to the cylinder holes of the substrate, the inner step adjustment plate, A fixing means is provided at a position corresponding to a lateral position in a direction orthogonal to the alignment direction of the plurality of cylinder holes with respect to each cylinder hole of the substrate, and the inner step adjustment plate is adjacent to the substrate. The fixing means is provided at a position corresponding to the position between the cylinder holes.

  According to a fourth aspect of the present invention, there is provided a multilayer metal gasket for a cylinder head according to the present invention, wherein the outer step adjustment plate and the inner step adjustment plate are fixed to one of the two substrates by the fixing means. Further, the outer step adjustment plate is fixed to one of the two substrates by the fixing means, and the inner step adjustment plate is fixed to the other substrate of the two substrates by the fixing means. It is characterized by being fixed.

  According to the laminated metal gasket for a cylinder head of the present invention as set forth in claims 1 to 4, the surface pressure applied to the annular bead of the substrate is increased by the difference in plate thickness between the outer step adjusting plate and the inner step adjusting plate. The balance between the surface pressure applied to the annular bead of the substrate and the surface pressure applied to the outer peripheral bead can be improved because the sealing performance against the combustion gas in the cylinder bore can be improved and the difference in plate thickness is used as described above. Can be fine-tuned.

  In addition, according to the laminated metal gasket for a cylinder head of the present invention, the outer step adjustment plate and the inner step adjustment plate are brought into contact with each other and joined together by laser welding along the butted portions. Since the fixing means are respectively fixed to each other, it is possible to reduce the manufacturing cost, which can take a long time for the high-precision positioning of the respective step adjustment plates and the laser welding over a relatively long distance. it can.

  In the present invention, as described in claim 5, the fixing means may be at least one of a shear-extrusion joint portion, a rivet, an eyelet, and a spot welded portion. Accordingly, the outer step adjustment plate and the inner step adjustment plate can be reliably fixed to the substrate side by the fixing means.

  In the present invention, as described in claim 6, the inner step adjustment plate includes an annular bead having an angled cross section formed around each of the plurality of cylinder holes, The annular beads of the substrate may be arranged between the two substrates so as to be aligned with each other in the thickness direction of the gasket and to protrude in opposite directions. Since the annular beads are tripled, the sealing performance against the combustion gas in the cylinder bore can be further improved.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a plan view showing the whole of the first embodiment of the cylinder-type laminated metal gasket of the present invention. FIGS. 2A and 2B are views of the metal gasket of the first embodiment. FIG. 3 is an enlarged sectional view taken along lines AA and BB in FIG. 1, FIG. 3 is a plan view showing an outer step adjustment plate of the metal gasket of the first embodiment, and FIG. 4 is a metal of the first embodiment. FIG. 5A is a plan view showing a combination of the outer step adjustment plate and the inner step adjustment plate. Reference numeral 1 in FIG. Substrate, 3 is an outer step adjustment plate, and 4 is an inner step adjustment plate.

  The cylinder-type laminated metal gasket 1 according to the first embodiment has a three-layer structure adapted to fit an open-deck type cylinder block whose deck surface is largely open at the position of a cooling water jacket surrounding each cylinder bore. As shown in FIG. 2, each of the substrates 2 is made of a stainless steel plate as a metal plate, and each of the substrates 2 has a metal gasket 1 as shown in FIG. Of the engine as an internal combustion engine in which the cylinder head is incorporated, a plurality of (four in the figure) cylinder holes 2a formed corresponding to each cylinder bore of the cylinder block to which the cylinder head is assembled, and formed around each cylinder hole 2a An annular bead 2b having an angled cross-sectional shape, a cooling water jacket for the cylinder block, and a cylinder head A number of cooling water holes 2c formed in the outer peripheral portion of each annular bead 2b corresponding to the water rejection holes, and pieces formed at positions entirely surrounding the annular beads 2b and the cooling water holes 2c And an outer peripheral bead 2d having an inclined cross-sectional shape.

  Each of the two substrates 2 further has a plurality of lubricating oil holes 2e and a plurality of head bolts (10 in the figure) inserted into the cylinder block for fixing the cylinder head to the cylinder block outside the outer peripheral bead 2d. Bolt holes 2f and grommet holes 2g described later, and as shown in FIG. 2, the annular beads 2b of the two substrates 2 are aligned with each other in the thickness direction of the gasket 1. The outer peripheral beads 2d of the two substrates 2 are also aligned in the thickness direction of the gasket 1 and are opposite to each other. Each protrudes inward.

  As shown in FIG. 2, the cylinder-type laminated metal gasket 1 of the first embodiment is also a metal having a thickness (for example, 0.15 mm) thinner than the substrate 2 between the two substrates 2. An outer step adjustment plate 3 made of a stainless steel plate as a plate and an inner step adjustment plate 4 made of a stainless steel plate as a metal plate having a thickness (for example, 0.2 mm) equal to the substrate 2 are provided. As shown in FIGS. 1, 3, and 5, the outer level difference adjusting plate 3 here is located from the position corresponding to the cooling water jacket of the cylinder block of the engine to the position of the outer peripheral ends of the two substrates 2. It is extended. And this outer level | step difference adjustment plate 3 protrudes inward so that it may mutually face in the position corresponding to the position between the cylinder holes 2a which adjoin each other of the board | substrate 2 of the inner periphery located corresponding to the said cooling water jacket. In addition to having a plurality of tongue-like projections 3a (two in each figure between the cylinder holes 2a of the substrate 2 in the figure), they are provided on the inner peripheral edge and correspond to the cooling water holes 2c of each substrate 2. A semi-oval recess 3b, a plurality of holes 3c respectively corresponding to the lubricating oil holes 2e and bolt holes 2f of each substrate 2, a grommet hole 3d described later, and an inner step adjustment plate 4 with respect to the outer step adjustment plate 3 There are two misassembly prevention protrusions 3e for preventing the wrong direction of the combination. Here, as will be described later, each tongue-like projection 3a is provided with a fixing means for fixing the outer step adjustment plate 3 to the lower substrate 2 in this embodiment.

  On the other hand, the inner level difference adjusting plate 4 here has a plurality of cylinder holes 4a respectively formed corresponding to the plurality of cylinder holes 2a of the substrate 2, as shown in FIGS. From the position of the inner peripheral edge of the cylinder hole 4a to the position of the cooling water jacket, it extends so as not to overlap with the outer step adjustment plate 3. And this inner level | step difference adjustment plate 4 fits in the substantially same plane as it so that it may not overlap with the tongue-like projection 3a in the position corresponding to each of the plurality of tongue claw-like projections 3a of the outer level difference adjustment plate 3. In addition to having a recess 4b, a hole 4c corresponding to the cooling water hole 2c of each substrate 2 and a half length corresponding to the cooling water hole 2c of each substrate 2 provided on the outer peripheral edge corresponding to the cooling water jacket. Two misassembly prevention recesses 4e (in FIG. 4, the upper misassembly prevention recess 4e is an upper part of the misalignment prevention plate 4e in order to prevent the combination of the circular recess 4d and the inner step adjustment plate 4 with respect to the outer step adjustment plate 3). Off the axis). This is because the inner step adjustment plate 4 is not symmetrical with respect to the axis connecting the centers of the cylinder holes 4a, and these two misassembly prevention recesses 4e have the inner step adjustment plate 4 in a predetermined orientation. Sometimes it fits with the two misassembly prevention protrusions 3e of the outer step adjustment plate 3.

  Furthermore, in the cylinder head metal gasket 1 according to the first embodiment, as shown in FIGS. 1 and 5, the central portion of each tongue-shaped projection 3a of the outer step adjustment plate 3 and the substrate of the inner step adjustment plate 4 are provided. 2. For each cylinder hole 2a, shear extrusion coupling portions 3f and 4f as fixing means are provided at positions corresponding to both side positions in the direction in which the plurality of cylinder holes 2a are aligned and perpendicular to each other. Each shear extrusion coupling portion 3f of the adjustment plate 3 fixes the central portion of each tongue-like projection 3a of the outer step adjustment plate 3 to a corresponding position on the lower substrate 2, and each shear extrusion coupling of the inner step adjustment plate 4 The portion 4f fixes a position corresponding to each substrate cylinder hole side portion of the inner step adjustment plate 4 to a corresponding position of the lower substrate 2, that is, the cylinder hole side portion.

  5 (b) and 5 (c) show a shear-extrusion joint portion 3f at the center of each tongue-like projection 3a of the outer level difference adjusting plate 3 along the CC line and the DD line in FIG. 5 (a). 5D and 5E show the shear extrusion coupling portions 4f at positions corresponding to the respective substrate cylinder hole side portions of the inner level difference adjusting plate 4, E- of FIG. 5A. It is sectional drawing which follows each of E line and FF line, and as shown in figure, the shear extrusion coupling | bond part 3f overlaps the outer level | step difference adjustment board 3 and the lower board | substrate 2 in order from the top, for example, longitudinal cross-sectional shape Is formed by pressing with a press die or NC punching press etc. that combines a trapezoidal punch with a rectangular cross section and a die with a rectangular hole that fits into the punch with a specified clearance with a larger short side. (See, for example, Japanese Patent Laid-Open No. Hei 6-281101) Similarly sectional extrusion coupling portion 4f, can be from above the substrate 2 of the inner step adjustment plate 4 and the lower one on top, is formed by pressing in the press mold and NC punching press or the like.

  Since the width of the portion pushed by shearing with the punch and the die is expanded by shearing as it is, the outer step adjusting plate 3 or the inner step adjusting plate 4 and the lower substrate 2 are joined together. By providing a bottom part and further pressing between the bottom part and the punch (pressing the punch into the bottom), it is crushed as shown in FIG. 2 (a), (b) and FIG. 5 (b), (d). It may be spread out, and in this way the bond can be made stronger.

  In the cylinder head metal gasket 1 according to the first embodiment, the deck surface of the shear extrusion coupling portions 3f and 4f protruding downward from the lower surface of the lower substrate 2 is greatly opened at the position of the cooling water jacket. It is arranged at the position of the cooling water jacket so as to be suitable for the open deck type cylinder block, and is inserted into the cooling water jacket. However, the cooling water is arranged at the position of the cooling water hole on the deck surface. The cylinder head metal gasket 1 of the first embodiment is also applied to a closed deck type cylinder block in which the deck surface is closed except for the cooling water hole above the cooling water jacket by entering the hole. can do.

  As shown in FIG. 1, the cylinder head metal gasket 1 according to the first embodiment includes grommet holes 2g, which are aligned with each other between two substrates 2 and an outer step adjusting plate 3 positioned therebetween. Ordinary grommets 5 inserted through 3d are crimped, and the two substrates 2 and the outer step adjustment plate 3 and the inner step adjustment plate 4 positioned therebetween are positioned by the grommets 5 so that three It has a layered structure. These grommet holes 2g and 3d are disengaged outward from the position between the cylinder block and the cylinder head of the engine. Therefore, the grommet 5 is located between the cylinder block and the cylinder head of the engine. The surface pressure of the beads 2b and 2d is not reduced by being sandwiched between the two.

  According to the cylinder head laminated metal gasket 1 of the first embodiment, the surface pressure applied to the annular bead 2a of the two substrates 2 due to the difference in thickness between the outer step adjustment plate 3 and the inner step adjustment plate 4. To improve the sealing performance against the combustion gas in the cylinder bore, and the difference in plate thickness is used as described above, so that the surface pressure and the outer periphery applied to the annular bead 2a of the two substrates 2 are increased. The balance with the surface pressure applied to the bead 2d can be finely adjusted.

  In addition, according to the cylinder head laminated metal gasket 1 of the first embodiment, the outer step adjustment plate 3 and the inner step adjustment plate 4 are brought into contact with each other without being joined together by laser welding. Since the parts are fixed to the locations by the shear-extrusion joints 3f and 4f, respectively, it is possible to shorten the manufacturing time which takes a long time for the high-precision positioning of the respective step adjustment plates 3 and 4 and laser welding over a relatively long distance. Manufacturing costs can be reduced.

  6 (a) and 6 (b) are cross-sectional views at the same positions as in FIGS. 2 (a) and 2 (b), showing a modification of the cylinder head laminated metal gasket 1 of the first embodiment. In this modification, as shown in the figure, the protruding directions of the annular bead 2b and the outer peripheral bead 2d of the upper substrate 2 are changed outward (upward), and the inner step adjusting plate 4 is provided with the plurality of cylinder holes. An annular bead 4g having a chevron cross-sectional shape formed around each of 4a is provided, and the annular beads 4g and the annular beads 2b of the upper and lower substrates 2 are aligned with each other in the thickness direction of the gasket 1. In addition, the second embodiment is different from the first embodiment only in that it is disposed between the two substrates 2 so as to protrude in opposite directions, and the other configuration is the same as that of the first embodiment.

  According to the cylinder head laminated metal gasket 1 of this modified example, in addition to obtaining the same operation and effect as the first embodiment, the annular bead is tripled, so that the combustion gas in the cylinder bore is reduced. Sealability can be further improved.

  7 (a) and 7 (b) are cross-sectional views at the same positions as in FIGS. 2 (a) and 2 (b), showing a second embodiment of the laminated metal gasket for a cylinder head according to the present invention. The laminated metal gasket 1 for the cylinder head of the second embodiment is configured to fit a closed deck type cylinder block in which the deck surface is closed except for the cooling water hole at the position of the cooling water jacket surrounding each cylinder bore. As in the first embodiment, they are of the three-layered type, and the central portion of each tongue-like projection 3a of the outer step adjustment plate 3 and the cylinder step 2a of the substrate 2 of the inner step adjustment plate 4 are Shear extrusion coupling portions 3f and 4f as fixing means are respectively provided at positions corresponding to both side positions in the alignment direction and the orthogonal direction of the plurality of cylinder holes 2a. On the outside step adjustment plate 3, each shear extrusion coupling portion 3 f fixes the central portion of each tongue-like projection 3 a of the outer step adjustment plate 3 to a corresponding position on the upper substrate 2, and each shear extrusion coupling portion 4 f of the inner step adjustment plate 4 The position corresponding to each substrate cylinder hole side portion of the inner step adjustment plate 4 is fixed to the corresponding position of the upper substrate 2, that is, the cylinder hole side portion.

  The lower substrate 2 has positions corresponding to the shear extrusion coupling portions 3f and 4f of the outer step adjustment plate 3 and the inner step adjustment plate 4 and the shear extrusion coupling portions 3f and 4f and the lower substrate. An escape hole 2h is provided so as not to overlap with 2 and the other configuration is the same as that of the first embodiment.

  The same effect as the first embodiment can be obtained by the cylinder head laminated metal gasket 1 of the second embodiment.

  FIGS. 8A and 8B are cross-sectional views at the same positions as in FIGS. 2A and 2B, showing a modification of the cylinder head laminated metal gasket 1 of the second embodiment. In this modification, as shown in the figure, the protruding directions of the annular bead 2b and the outer peripheral bead 2d of the upper substrate 2 are changed outward (upward), and the inner step adjusting plate 4 is provided with the plurality of cylinder holes. An annular bead 4g having a chevron cross-sectional shape formed around each of 4a is provided, and the annular beads 4g and the annular beads 2b of the upper and lower substrates 2 are aligned with each other in the thickness direction of the gasket 1. At the same time, the second embodiment is different from the second embodiment only in that it is disposed between the two substrates 2 so as to protrude in opposite directions, and the other configuration is the same as that of the second embodiment.

  According to the cylinder-type laminated metal gasket 1 of this modified example, in addition to obtaining the same function and effect as in the second embodiment, the annular bead is tripled, so that the combustion gas in the cylinder bore is reduced. Sealability can be further improved.

  9 (a) and 9 (b) are cross-sectional views at the same positions as in FIGS. 2 (a) and 2 (b), showing a third embodiment of the laminated metal gasket for a cylinder head according to the present invention. The cylinder head laminated metal gasket 1 of the third embodiment is a three-layer laminated structure adapted to fit an open deck cylinder block whose deck surface is largely open at the position of the cooling water jacket surrounding each cylinder bore. In the same manner as in the first embodiment, a plurality of cylinders are provided for the center portion of each tongue-like projection 3a of the outer step adjustment plate 3 and each cylinder hole 2a of the substrate 2 of the inner step adjustment plate 4. Shear extrusion coupling portions 3f and 4f as fixing means are respectively provided at positions corresponding to the positions on both sides of the direction in which the holes 2a are aligned and perpendicular to each other. Each step adjustment plate 3 The shear extrusion coupling portion 3f fixes the center of each tongue-like projection 3a of the outer step adjustment plate 3 to a corresponding position on the lower substrate 2, and each shear extrusion coupling portion 4f of the inner step adjustment plate 4 The position corresponding to each substrate cylinder hole side portion of the step adjustment plate 4 is fixed to the corresponding position of the upper substrate 2, that is, the cylinder hole side portion.

  And, in the position corresponding to each shear extrusion coupling portion 4f of the inner level adjustment plate 4 of the lower substrate 2, there is an escape hole 2h so that the shear extrusion coupling portion 4f and the lower substrate 2 do not overlap. The other configurations are the same as those of the first embodiment.

  The same effect as the first embodiment can be obtained by the cylinder head laminated metal gasket 1 of the third embodiment.

  10 (a) and 10 (b) are cross-sectional views at the same position as in FIGS. 2 (a) and 2 (b), showing a modification of the cylinder head laminated metal gasket 1 of the third embodiment. In this modification, as shown in the figure, the protruding directions of the annular bead 2b and the outer peripheral bead 2d of the upper substrate 2 are changed outward (upward), and the inner step adjusting plate 4 is provided with the plurality of cylinder holes. An annular bead 4g having a chevron cross-sectional shape formed around each of 4a is provided, and the annular beads 4g and the annular beads 2b of the upper and lower substrates 2 are aligned with each other in the thickness direction of the gasket 1. At the same time, the second embodiment is different from the third embodiment only in that it is disposed between the two substrates 2 so as to protrude in opposite directions, and the other configuration is the same as that of the third embodiment.

  According to the cylinder-type laminated metal gasket 1 of this modified example, in addition to obtaining the same function and effect as in the third embodiment, the annular bead is tripled, so that the combustion gas in the cylinder bore is reduced. Sealability can be further improved.

  11 (a) and 11 (b) are cross-sectional views at the same positions as in FIGS. 2 (a) and 2 (b), showing a fourth embodiment of the laminated metal gasket for a cylinder head according to the present invention. The cylinder-type laminated metal gasket 1 of the fourth embodiment is a three-layer laminated structure adapted to an open deck type cylinder block in which the deck surface is largely opened at the position of the cooling water jacket surrounding each cylinder bore. In the same manner as in the first embodiment, a plurality of cylinders are provided for the center portion of each tongue-like projection 3a of the outer step adjustment plate 3 and each cylinder hole 2a of the substrate 2 of the inner step adjustment plate 4. Shear extrusion coupling portions 3f and 4f as fixing means are respectively provided at positions corresponding to the positions on both sides of the direction in which the holes 2a are aligned and perpendicular to each other. Level adjustment plate 3 Each shear extrusion coupling portion 3f fixes the central portion of each tongue-like projection 3a of the outer step adjustment plate 3 at a corresponding position on the upper substrate 2, and each shear extrusion coupling portion 4f of the inner step adjustment plate 4 The position corresponding to each substrate cylinder hole side portion of the step adjustment plate 4 is fixed to the corresponding position of the lower substrate 2, that is, the cylinder hole side portion.

  In the lower substrate 2, escape holes 2 h are provided at positions corresponding to the respective shear extrusion coupling portions 3 f of the outer level difference adjusting plate 3 so that the shear extrusion coupling portions 3 f and the lower substrate 2 do not overlap with each other. The other configurations are the same as those of the first embodiment.

  The same effect as that of the first embodiment can be obtained by the cylinder head laminated metal gasket 1 of the fourth embodiment.

  12 (a) and 12 (b) are cross-sectional views at the same positions as in FIGS. 2 (a) and 2 (b), showing a modification of the cylinder head laminated metal gasket 1 of the fourth embodiment. In this modification, as shown in the figure, the protruding directions of the annular bead 2b and the outer peripheral bead 2d of the upper substrate 2 are changed outward (upward), and the inner step adjusting plate 4 is provided with the plurality of cylinder holes. An annular bead 4g having a chevron cross-sectional shape formed around each of 4a is provided, and the annular beads 4g and the annular beads 2b of the upper and lower substrates 2 are aligned with each other in the thickness direction of the gasket 1. At the same time, the second embodiment is different from the previous fourth embodiment only in that it is disposed between the two substrates 2 so as to protrude in opposite directions, and the other configuration is the same as that of the fourth embodiment.

  According to the cylinder-type laminated metal gasket 1 of this modified example, in addition to obtaining the same operational effects as in the fourth embodiment, the annular bead is tripled, so that the combustion gas in the cylinder bore is reduced. Sealability can be further improved.

  FIG. 13 is a plan view showing the entire fifth embodiment of the cylinder-type laminated metal gasket of the present invention, and FIGS. 14A and 14B are views of the metal gasket of the fifth embodiment shown in FIG. FIG. 15 is an enlarged cross-sectional view taken along lines GG and HH, FIG. 15 is a plan view showing an outer step adjustment plate of the metal gasket of the fifth embodiment, and FIG. 16 is an inner side of the metal gasket of the fifth embodiment. FIG. 17A is a plan view showing the step adjustment plate in a state where the outer step adjustment plate and the inner step adjustment plate are combined. In FIG. Indicates an outer step adjustment plate, and 4 indicates an inner step adjustment plate.

  The cylinder-type laminated metal gasket 1 according to the fifth embodiment has a three-layer structure adapted to fit an open deck type cylinder block whose deck surface is largely open at the position of a cooling water jacket surrounding each cylinder bore. As shown in FIG. 14, each of the substrates 2 is a laminated type, and includes two substrates 2 each made of a stainless steel plate as a metal plate. Each of these substrates 2 is a metal gasket 1 as shown in FIG. Of the engine as an internal combustion engine in which the cylinder head is incorporated, a plurality of (four in the figure) cylinder holes 2a formed corresponding to each cylinder bore of the cylinder block to which the cylinder head is assembled, and formed around each cylinder hole 2a An annular bead 2b having an angled cross section, a cooling water jacket for the cylinder block, and a cylinder head. A number of cooling water holes 2c formed in the outer peripheral portion of each annular bead 2b corresponding to the cooling water holes, and the annular beads 2b and the cooling water holes 2c are formed so as to surround the whole. And an outer peripheral bead 2d having a one-sided sectional shape.

  Each of the two substrates 2 further has a plurality of lubricating oil holes 2e and a plurality of head bolts (10 in the figure) inserted into the cylinder block for fixing the cylinder head to the cylinder block outside the outer peripheral bead 2d. Bolt holes 2f and grommet holes 2g described later. As shown in FIG. 14, the annular beads 2b of the two substrates 2 are aligned with each other in the thickness direction of the gasket 1. The outer peripheral beads 2d of the two substrates 2 are also aligned in the thickness direction of the gasket 1 and are opposite to each other. Each protrudes inward.

  As shown in FIG. 14, the cylinder-type laminated metal gasket 1 of the fifth embodiment is also a metal having a thickness (for example, 0.15 mm) thinner than the substrate 2 between the two substrates 2. An outer step adjustment plate 3 made of a stainless steel plate as a plate and an inner step adjustment plate 4 made of a stainless steel plate as a metal plate having a thickness (for example, 0.2 mm) equal to the substrate 2 are provided. As shown in FIGS. 13, 15, and 17, the outer level difference adjusting plate 3 here is located from the position corresponding to the cooling water jacket of the cylinder block of the engine to the position of the outer peripheral ends of the two substrates 2. It is extended. And this outer level | step difference adjustment plate 3 is the position of the inner peripheral edge located corresponding to the said cooling water jacket in the both-sides position of the direction orthogonal to the alignment direction of these cylinder holes 2a with respect to each cylinder hole 2a of the board | substrate 2. In addition to having a plurality of tongue-like protrusions 3g that protrude inward so as to face each other at a position corresponding to each corresponding position (a total of eight positions for each cylinder hole 2a of the substrate 2 in the figure) A semi-oval recess 3b provided on the inner peripheral edge corresponding to the cooling water hole 2c of each substrate 2, a plurality of holes 3c corresponding to the lubricating oil hole 2e and the bolt hole 2f of each substrate 2, and a grommet described later It has a hole 3d and two misassembly prevention protrusions 3e for preventing the combination of the inner step adjustment plate 4 and the outer step adjustment plate 3 from being mistaken. Here, as will be described later, each tongue-like projection 3g is provided with a fixing means for fixing the outer step adjustment plate 3 to the lower substrate 2 in this embodiment.

  On the other hand, the inner level difference adjusting plate 4 here has a plurality of cylinder holes 4a respectively formed corresponding to the plurality of cylinder holes 2a of the substrate 2, as shown in FIGS. From the position of the inner peripheral edge of the cylinder hole 4a to the position of the cooling water jacket, it extends so as not to overlap with the outer step adjustment plate 3. And this inner level | step difference adjustment plate 4 fits in the position corresponding to each of several tongue nail | claw-shaped protrusion 3g of the outer level | step difference adjustment plate 3 on the substantially same plane as it so that it may not overlap with the tongue-shaped protrusion 3g. In addition to having a recess 4h, a hole 4c corresponding to the cooling water hole 2c of each substrate 2 and a semi-long corresponding to the cooling water hole 2c of each substrate 2 provided on the outer peripheral edge corresponding to the cooling water jacket. Two misassembly prevention recesses 4e (in FIG. 16, the upper misassembly prevention recess 4e is an upper side in order to prevent a mistake in the orientation of the combination of the circular recess 4d and the inner step adjustment plate 4 with respect to the outer step adjustment plate 3. Off the axis). This is because the inner step adjustment plate 4 is not symmetrical with respect to the axis connecting the centers of the cylinder holes 4a, and these two misassembly prevention recesses 4e have the inner step adjustment plate 4 in a predetermined orientation. Sometimes it fits with the two misassembly prevention protrusions 3e of the outer step adjustment plate 3.

  Furthermore, in the cylinder head metal gasket 1 of the fifth embodiment, as shown in FIGS. 13 and 17, the central portion of each tongue-shaped projection 3g of the outer step adjustment plate 3 and the substrate of the inner step adjustment plate 4 are provided. Shear extrusion coupling portions 3f and 4f as fixing means are provided at two positions corresponding to the positions between two adjacent cylinder holes 2a, respectively, and each shear of the outer step adjustment plate 3 is provided. The extrusion coupling portion 3f fixes the center of each tongue-like projection 3g of the outer step adjustment plate 3 to the corresponding position of the lower substrate 2, and each shear extrusion coupling portion 4f of the inner step adjustment plate 4 The position corresponding to the position between the substrate cylinder holes of the adjustment plate 4 is fixed to the corresponding position of the lower substrate 2, that is, the position between the cylinder holes.

  17 (b) and 17 (c) show a shear-extrusion coupling portion 3f at the center of each tongue-like projection 3g of the outer level difference adjusting plate 3 along the II and JJ lines in FIG. 17 (a). FIGS. 17 (d) and 17 (e) are cross-sectional views taken along the lines, respectively, and show a shear-extrusion coupling portion 4f at a position corresponding to each substrate cylinder hole side portion of the inner level difference adjusting plate 4 in FIG. 17 (a). It is sectional drawing which each follows K line and LL line, and as shown in figure, the shear extrusion coupling | bond part 3f overlaps the outer level | step difference adjustment plate 3 and the lower board | substrate 2 in order from the top, for example, longitudinal cross-sectional shape Is formed by pressing with a press die or NC punching press etc. that combines a trapezoidal punch with a rectangular cross section and a die with a rectangular hole that fits into the punch with a specified clearance with a larger short side. (For example, Japanese Patent Laid-Open No. Hei 6-281101) Similarly, the shear-extrusion coupling portion 4f can also be formed by stacking the inner level difference adjusting plate 4 and the lower substrate 2 in order from the top and pressing them with the press die or NC punching press. .

  Since the width of the portion pushed by shearing with the punch and the die is expanded by shearing as it is, the outer step adjusting plate 3 or the inner step adjusting plate 4 and the lower substrate 2 are joined together. A bottom portion is provided and further pressed between the bottom portion and the punch (pressing the punch into the bottom), thereby being crushed as shown in FIGS. 14 (a), (b) and FIGS. 17 (b), (d). It may be spread out, and in this way the bond can be made stronger.

  In the cylinder head metal gasket 1 of the fifth embodiment, the deck surface of the shear extrusion coupling portions 3f and 4f protruding downward from the lower surface of the lower substrate 2 is greatly opened at the position of the cooling water jacket. It is arranged at the position of the cooling water jacket so as to be suitable for the open deck type cylinder block, and is inserted into the cooling water jacket. However, the cooling water is arranged at the position of the cooling water hole on the deck surface. The metal gasket 1 for cylinder head of the fifth embodiment is also applied to a closed deck type cylinder block in which the deck surface is closed except for the cooling water hole above the cooling water jacket by entering the hole. can do.

  As shown in FIG. 13, the cylinder head metal gasket 1 according to the fifth embodiment has grommet holes 2g, which are aligned with each other between two substrates 2 and an outer step adjusting plate 3 positioned therebetween. Ordinary grommets 5 inserted through 3d are crimped, and the two substrates 2 and the outer step adjustment plate 3 and the inner step adjustment plate 4 positioned therebetween are positioned by the grommets 5 so that three It has a layered structure. These grommet holes 2g and 3d are disengaged outward from the position between the cylinder block and the cylinder head of the engine. Therefore, the grommet 5 is located between the cylinder block and the cylinder head of the engine. The surface pressure of the beads 2b and 2d is not reduced by being sandwiched between the two.

  According to the cylinder head laminated metal gasket 1 of the fifth embodiment, the surface pressure applied to the annular bead 2a of the two substrates 2 due to the difference in thickness between the outer step adjustment plate 3 and the inner step adjustment plate 4. To improve the sealing performance against the combustion gas in the cylinder bore, and the difference in plate thickness is used as described above, so that the surface pressure and the outer periphery applied to the annular bead 2a of the two substrates 2 are increased. The balance with the surface pressure applied to the bead 2d can be finely adjusted.

  Moreover, according to the cylinder head laminated metal gasket 1 of the fifth embodiment, the outer step adjustment plate 3 and the inner step adjustment plate 4 are brought into contact with each other without being joined together by laser welding along the butted portion. Since it is fixed at a plurality of locations on the substrate 2 side by the shear extrusion coupling portions 3f and 4f, it takes a long time to position each of the step adjustment plates 3 and 4 with high precision and laser welding over a relatively long distance. Manufacturing time can be shortened and manufacturing costs can be reduced.

  18 (a) and 18 (b) are cross-sectional views at the same positions as in FIGS. 14 (a) and 14 (b), showing a modification of the cylinder head laminated metal gasket 1 of the fifth embodiment. In this modification, as shown in the figure, the protruding directions of the annular bead 2b and the outer peripheral bead 2d of the upper substrate 2 are changed outward (upward), and the inner step adjusting plate 4 is provided with the plurality of cylinder holes. An annular bead 4g having a chevron cross-sectional shape formed around each of 4a is provided, and the annular beads 4g and the annular beads 2b of the upper and lower substrates 2 are aligned with each other in the thickness direction of the gasket 1. At the same time, the second embodiment is different from the fifth embodiment only in that it is disposed between the two substrates 2 so as to protrude in opposite directions, and the other configuration is the same as that of the first embodiment.

  According to the cylinder-type laminated metal gasket 1 of this modified example, in addition to obtaining the same operational effects as the previous fifth embodiment, the annular beads are tripled, so that the combustion gas in the cylinder bore is reduced. Sealability can be further improved.

  FIGS. 19 (a) and 19 (b) are cross-sectional views at the same positions as FIGS. 14 (a) and 14 (b), showing a sixth embodiment of the cylinder-type laminated metal gasket of the present invention. The cylinder-type laminated metal gasket 1 of the sixth embodiment is configured to fit a closed deck type cylinder block in which the deck surface is closed except for the cooling water hole at the position of the cooling water jacket surrounding each cylinder bore. A three-layer laminated type, like the fifth embodiment, between the central portion of each tongue-like projection 3g of the outer step adjustment plate 3 and the cylinder hole 2a of the inner step adjustment plate 4 adjacent to each other on the substrate 2. Shear extrusion coupling portions 3f and 4f as fixing means are provided at two positions corresponding to the positions of the two, respectively. However, unlike the fifth embodiment, as shown in the drawing, the outer step adjustment plate Each shear push of 3 The joint portion 3f fixes the center of each tongue-like projection 3g of the outer step adjustment plate 3 to a corresponding position on the upper substrate 2, and each shear push-out joint portion 4f of the inner step adjustment plate 4 adjusts the inner step adjustment. The position corresponding to the position between the substrate cylinder holes of the plate 4 is fixed to the corresponding position of the upper substrate 2, that is, the position between the cylinder holes.

  The lower substrate 2 has positions corresponding to the shear extrusion coupling portions 3f and 4f of the outer step adjustment plate 3 and the inner step adjustment plate 4 and the shear extrusion coupling portions 3f and 4f and the lower substrate. An escape hole 2h is provided so as not to overlap with 2 and the other configuration is the same as that of the fifth embodiment.

  Also with the cylinder head laminated metal gasket 1 of the sixth embodiment, the same effects as those of the fifth embodiment can be obtained.

  20 (a) and 20 (b) are cross-sectional views at the same positions as in FIGS. 14 (a) and 14 (b), showing a modification of the cylinder head laminated metal gasket 1 of the sixth embodiment. In this modification, as shown in the figure, the protruding directions of the annular bead 2b and the outer peripheral bead 2d of the upper substrate 2 are changed outward (upward), and the inner step adjusting plate 4 is provided with the plurality of cylinder holes. An annular bead 4g having a chevron cross-sectional shape formed around each of 4a is provided, and the annular beads 4g and the annular beads 2b of the upper and lower substrates 2 are aligned with each other in the thickness direction of the gasket 1. At the same time, the second embodiment is different from the previous sixth embodiment only in that it is disposed between the two substrates 2 so as to protrude in opposite directions, and the other configuration is the same as that of the sixth embodiment.

  According to the cylinder-type laminated metal gasket 1 of this modified example, in addition to obtaining the same function and effect as the previous sixth embodiment, the annular bead is tripled, so that the combustion gas in the cylinder bore is reduced. Sealability can be further improved.

  FIGS. 21 (a) and 21 (b) are cross-sectional views at the same positions as FIGS. 14 (a) and 14 (b), showing a seventh embodiment of the cylinder-type laminated metal gasket of the present invention. The cylinder-type laminated metal gasket 1 of the seventh embodiment is a three-layer laminated structure adapted to an open deck type cylinder block in which the deck surface is largely opened at the position of the cooling water jacket surrounding each cylinder bore. In the same manner as in the fifth embodiment, the center of each tongue-like protrusion 3g of the outer step adjustment plate 3 and the position of the inner step adjustment plate 4 between the cylinder holes 2a adjacent to each other on the substrate 2 are the same. Shear extrusion coupling portions 3f and 4f as fixing means are provided at a total of six positions corresponding to two locations, respectively, but unlike the fifth embodiment, as shown in FIG. Shear extrusion The portion 3f fixes the central portion of each tongue-like projection 3g of the outer step adjustment plate 3 to the corresponding position of the lower substrate 2, and each shear extrusion coupling portion 4f of the inner step adjustment plate 4 The positions corresponding to the positions of the four substrate cylinder holes are fixed to the corresponding positions of the upper substrate 2, that is, the positions between the cylinder holes.

  And, in the position corresponding to each shear extrusion coupling portion 4f of the inner level adjustment plate 4 of the lower substrate 2, there is an escape hole 2h so that the shear extrusion coupling portion 4f and the lower substrate 2 do not overlap. Otherwise, the configuration is the same as that of the fifth embodiment.

  The cylinder head laminated metal gasket 1 of the seventh embodiment can provide the same effects as those of the fifth embodiment.

  22 (a) and 22 (b) are cross-sectional views at the same positions as in FIGS. 14 (a) and 14 (b), showing a modification of the cylinder head laminated metal gasket 1 of the seventh embodiment. In this modification, as shown in the figure, the protruding directions of the annular bead 2b and the outer peripheral bead 2d of the upper substrate 2 are changed outward (upward), and the inner step adjusting plate 4 is provided with the plurality of cylinder holes. An annular bead 4g having a chevron cross-sectional shape formed around each of 4a is provided, and the annular beads 4g and the annular beads 2b of the upper and lower substrates 2 are aligned with each other in the thickness direction of the gasket 1. At the same time, the second embodiment is different from the previous seventh embodiment only in that it is disposed between the two substrates 2 so as to protrude in opposite directions, and the other configuration is the same as that of the seventh embodiment.

  According to the cylinder-type laminated metal gasket 1 of this modified example, in addition to obtaining the same function and effect as in the previous seventh embodiment, the annular bead is tripled, so that the combustion gas in the cylinder bore can be reduced. Sealability can be further improved.

  FIGS. 23 (a) and (b) are cross-sectional views at the same positions as FIGS. 14 (a) and 14 (b), showing an eighth embodiment of the cylinder-type laminated metal gasket of the present invention. The cylinder-type laminated metal gasket 1 of the eighth embodiment is a three-layer laminated structure adapted to an open deck type cylinder block in which the deck surface is largely open at the position of the cooling water jacket surrounding each cylinder bore. In the same manner as in the fifth embodiment, the center of each tongue-like protrusion 3g of the outer step adjustment plate 3 and the position of the inner step adjustment plate 4 between the cylinder holes 2a adjacent to each other on the substrate 2 are the same. Shear extrusion coupling portions 3f and 4f as fixing means are provided at a total of six positions corresponding to two locations, respectively, but unlike the fifth embodiment, as shown in FIG. Shear extrusion The portion 3f fixes the central portion of each tongue-like projection 3g of the outer step adjustment plate 3 to the corresponding position of the upper substrate 2, and each shear push-out coupling portion 4f of the inner step adjustment plate 4 The position corresponding to each position between the substrate cylinder holes is fixed to the corresponding position of the lower substrate 2, that is, the position between the cylinder holes.

  In the lower substrate 2, escape holes 2 h are provided at positions corresponding to the respective shear extrusion coupling portions 3 f of the outer level difference adjusting plate 3 so that the shear extrusion coupling portions 3 f and the lower substrate 2 do not overlap with each other. Otherwise, the configuration is the same as that of the fifth embodiment.

  The cylinder head laminated metal gasket 1 according to the eighth embodiment can provide the same effects as those of the fifth embodiment.

  24 (a) and 24 (b) are cross-sectional views at the same positions as in FIGS. 14 (a) and 14 (b), showing a modification of the cylinder head laminated metal gasket 1 of the eighth embodiment. In this modification, as shown in the figure, the protruding directions of the annular bead 2b and the outer peripheral bead 2d of the upper substrate 2 are changed outward (upward), and the inner step adjusting plate 4 is provided with the plurality of cylinder holes. An annular bead 4g having a chevron cross-sectional shape formed around each of 4a is provided, and the annular beads 4g and the annular beads 2b of the upper and lower substrates 2 are aligned with each other in the thickness direction of the gasket 1. In addition, the second embodiment is different from the previous eighth embodiment only in that it is disposed between the two substrates 2 so as to protrude in opposite directions, and the other configuration is the same as that of the eighth embodiment.

  According to the cylinder-type laminated metal gasket 1 of this modified example, in addition to obtaining the same function and effect as in the previous eighth embodiment, the annular bead is tripled, so that the combustion gas in the cylinder bore can be reduced. Sealability can be further improved.

  25 (a) and 25 (b) show the lower substrate 2 and the outer step adjustment plate using rivets 6 as other fixing means in place of the shear extrusion coupling portions 3f and 4f in the first embodiment. FIG. 15 is a cross-sectional view at the same position as in FIGS. 14A and 14B, showing an example in which 3 and the lower substrate 2 and the inner level difference adjusting plate 4 are coupled. Here, the rivet 6 and the upper substrate 2 are shown. Is provided with a relief hole 2h in the upper substrate 2 so as to prevent it from coming into contact and tightening. Even if it does in this way, the same effect as the above-mentioned 1st example is acquired.

  26 (a) and 26 (b) show the lower substrate 2 and the outer side using rivets 6 as other fixing means instead of the shear extrusion coupling portions 3f and 4f in the modification of the first embodiment. FIG. 15 is a cross-sectional view at the same position as in FIGS. 14A and 14B, showing an example in which the step adjustment plate 3 and the lower substrate 2 and the inner step adjustment plate 4 are combined, and here the rivet 6 and the upper side An escape hole 2h is provided in the upper substrate 2 so that the substrate 2 does not come into contact with the substrate 2 and tightening becomes difficult. Even if it does in this way, the effect similar to the modification of the above 1st Example is acquired.

  27 (a) and 27 (b) show an adjustment of the step difference between the lower substrate 2 and the outer substrate 2 by using a grommet 7 as another fixing means in place of the shear extrusion coupling portions 3f and 4f in the first embodiment. FIG. 15 is a cross-sectional view at the same position as in FIGS. 14A and 14B, showing an example in which the plate 3 and the lower substrate 2 and the inner level difference adjusting plate 4 are coupled, and here, the eyelet 7 and the upper substrate The upper substrate 2 is provided with a relief hole 2h so that it does not come into contact with 2 and tightening becomes difficult. Even if it does in this way, the same effect as the above-mentioned 1st example is acquired.

  28 (a) and 28 (b) show the lower substrate 2 using a grommet 7 as another fixing means instead of the shear extrusion coupling portions 3f and 4f in the modification of the first embodiment. FIGS. 14A and 14B are sectional views showing an example in which the outer step adjustment plate 3 and the lower substrate 2 and the inner step adjustment plate 4 are coupled to each other. An escape hole 2h is provided in the upper substrate 2 so that the upper substrate 2 does not come into contact with the upper substrate 2 to be difficult to tighten. Even if it does in this way, the effect similar to the modification of the above 1st Example is acquired.

  29 (a) and 29 (b) show the lower substrate 2 and the outer side by using spot welds 8 as other fixing means in place of the shear-extrusion joints 3f and 4f in the first embodiment. It is sectional drawing in the position similar to FIG. 14 (a), (b) which shows the example which couple | bonded the level | step difference adjustment plate 3, the lower board | substrate 2, and the inner side level adjustment plate 4, respectively. Even if it does in this way, the same effect as the above-mentioned 1st example is acquired.

  30 (a) and 30 (b) show a lower substrate using a spot welded portion 8 as another fixing means in place of the shear extrusion coupling portions 3f and 4f in the modification of the first embodiment. 15 is a cross-sectional view at the same position as in FIGS. 14A and 14B, showing an example in which 2 and the outer step adjustment plate 3 and the lower substrate 2 and the inner step adjustment plate 4 are combined. Even if it does in this way, the effect similar to the modification of the above 1st Example is acquired.

  While the present invention has been described based on the illustrated examples, the present invention is not limited to the above-described examples, and can be appropriately changed within the scope of the claims. For example, the rivet 6, the eyelet 7, and the spot welded portion 8 shown in FIGS. 25 to 30 can be used in other embodiments and other modifications.

  Thus, according to the laminated metal gasket for a cylinder head of the present invention, the surface pressure applied to the annular bead of the substrate is increased by the difference in plate thickness between the outer step adjusting plate and the inner step adjusting plate, and the combustion gas in the cylinder bore is increased. Since the difference in plate thickness is used as described above, the balance between the surface pressure applied to the annular bead and the surface pressure applied to the outer peripheral bead of the substrate can be finely adjusted. .

  In addition, according to the laminated metal gasket for a cylinder head of the present invention, the outer step adjustment plate and the inner step adjustment plate are brought into contact with each other and joined together by laser welding along the butted portions. Since the fixing means are respectively fixed to each other, it is possible to reduce the manufacturing cost, which can take a long time for the high-precision positioning of the respective step adjustment plates and the laser welding over a relatively long distance. it can.

It is a top view which shows the whole 1st Example of the lamination | stacking type | mold metal gasket for cylinder heads of this invention. (A), (b) is an expanded sectional view which each follows the AA line of FIG. 1, and the BB line of the metal gasket of the said 1st Example. It is a top view which shows the outer side level | step difference adjustment plate of the metal gasket of the said 1st Example. It is a top view which shows the inner level | step difference adjustment plate of the metal gasket of the said 1st Example. (A) is a top view which shows the state which combined the outer level | step difference adjustment plate and inner level | step difference adjustment plate of the metal gasket of the said 1st Example, (b), (c) is each tongue shape of an outer level | step difference adjustment plate. Sectional views along the C-C and DD lines in (a) showing the shear-extrusion joint at the center of the projections, (d) and (e) are the substrate cylinder hole sides of the inner step adjustment plate It is sectional drawing which follows the EE line | wire and FF line | wire of (a) which shows the shear extrusion coupling | bond part of the position corresponding to a part. (A), (b) is sectional drawing in the position similar to FIG. 2 (a), (b) which shows the modification of the multilayer metal gasket 1 for cylinder heads of the said 1st Example. (A), (b) is sectional drawing in the position similar to FIG. 2 (a), (b) which shows 2nd Example of the laminated | stacked metal gasket for cylinder heads of this invention. (A), (b) is sectional drawing in the position similar to FIG. 2 (a), (b) which shows the modification of the multilayer metal gasket 1 for cylinder heads of the said 2nd Example. (A), (b) is sectional drawing in the position similar to FIG. 2 (a), (b) which shows 3rd Example of the laminated metal gasket for cylinder heads of this invention. (A), (b) is sectional drawing in the position similar to FIG. 2 (a), (b) which shows the modification of the multilayer metal gasket 1 for cylinder heads of the said 3rd Example. (A), (b) is sectional drawing in the position similar to FIG. 2 (a), (b) which shows 4th Example of the laminated | stacked metal gasket for cylinder heads of this invention. (A), (b) is sectional drawing in the position similar to FIG. 2 (a), (b) which shows the modification of the multilayer metal gasket 1 for cylinder heads of the said 4th Example. It is a top view which shows the whole 5th Example of the laminated | stacked metal gasket for cylinder heads of this invention. (A), (b) is an expanded sectional view which each follows the GG line and HH line of FIG. 13 of the metal gasket of the said 5th Example. It is a top view which shows the outer side level | step difference adjustment plate of the metal gasket of the said 5th Example. It is a top view which shows the inner level | step difference adjustment plate of the metal gasket of the said 5th Example. (A) is a top view which shows the state which combined the outer level | step difference adjustment plate and inner level | step difference adjustment plate of the metal gasket of the said 5th Example, (b), (c) is each tongue shape of an outer level | step difference adjustment plate. Sectional views along the II line and the JJ line of (a) showing the shear-extrusion coupling part 3f at the center of the projection, (d) and (e) are the substrate cylinder holes of the inner step adjustment plate It is sectional drawing which each shows the shear extrusion coupling | bond part of the position corresponding to a side part along the KK line | wire and LL line | wire of Fig.17 (a). (A), (b) is sectional drawing in the position similar to FIG. 14 (a), (b) which shows the modification of the multilayer metal gasket 1 for cylinder heads of the said 5th Example. (A), (b) is sectional drawing in the position similar to Fig.14 (a), (b) which shows 6th Example of the laminated | stacked metal gasket for cylinder heads of this invention. (A), (b) is sectional drawing in the position similar to FIG. 14 (a), (b) which shows the modification of the multilayer metal gasket 1 for cylinder heads of the said 6th Example. (A), (b) is sectional drawing in the position similar to FIG. 14 (a), (b) which shows the 7th Example of the laminated | stacked metal gasket for cylinder heads of this invention. (A), (b) is sectional drawing in the position similar to FIG. 14 (a), (b) which shows the modification of the multilayer metal gasket 1 for cylinder heads of the said 7th Example. (A), (b) is sectional drawing in the position similar to FIG. 14 (a), (b) which shows the 8th Example of the laminated | stacked metal gasket for cylinder heads of this invention. (A), (b) is sectional drawing in the position similar to FIG. 14 (a), (b) which shows the modification of the multilayer metal gasket 1 for cylinder heads of the said 8th Example. (A), (b) shows a lower substrate, an outer step adjustment plate, a lower substrate, and an inner side by using rivets as other fixing means instead of the shear extrusion coupling portion in the first embodiment. It is sectional drawing in the position similar to FIG. 14 (a), (b) which shows the example which couple | bonded the level | step difference adjustment board, respectively. (A), (b), instead of the shear-extrusion joint portion in the modification of the first embodiment, using a rivet as another fixing means, the lower substrate, the outer step adjustment plate, and the lower step adjustment plate It is sectional drawing in the position similar to Fig.14 (a), (b) which shows the example which each couple | bonded the board | substrate and the inner side level | step difference adjustment board. (A), (b), instead of the shear-extrusion coupling portion in the first embodiment, a lower substrate, an outer step adjustment plate, and a lower substrate using eyelets as still another fixing means It is sectional drawing in the position similar to FIG. 14 (a), (b) which shows the example which couple | bonded the inner level | step difference adjustment board, respectively. (A), (b) shows a lower substrate, an outer step adjustment plate, and a lower side using a grommet as another fixing means instead of the shear-extrusion coupling portion in the modification of the first embodiment. It is sectional drawing in the position similar to Fig.14 (a), (b) which shows the example which couple | bonded the board | substrate and inner level | step difference adjustment board, respectively. (A), (b) is replaced with the shear-extrusion joint part in the previous first embodiment, and further uses a spot weld part as another fixing means, and uses a lower substrate, an outer step adjustment plate, and a lower part. It is sectional drawing in the position similar to Fig.14 (a), (b) which shows the example which each couple | bonded the board | substrate and the inner side level | step difference adjustment board. (A), (b) is replaced with the shear extrusion coupling part in the modification of the previous first embodiment, and further using a spot welded part as another fixing means, the lower substrate and the outer step adjustment plate, It is sectional drawing in the position similar to Fig.14 (a), (b) which shows the example which couple | bonded the lower board | substrate and the inner level | step difference adjustment board, respectively.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Metal gasket 2 Board | substrate 2a Cylinder hole 2b Annular bead 2c Cooling water hole 2d Outer periphery bead 2e Lubricating oil hole 2f Bolt hole 2g Grommet hole 2h Escape hole 3 Outer step adjustment plate 3a Tongue-shaped protrusion 3b Recess 3c hole 3d Grommet hole 3e Prevention protrusion 3f Shear extrusion joint 3g Tongue protrusion 4 Inner step adjustment plate 4a Cylinder hole 4b Recess 4c Hole 4d Recess 4e Misassembly prevention recess 4f Shear extrusion connection 4g Annular bead 4h Recess 5 Grommet 6 Rivet 7 Eyelet 8 Spot weld

Claims (9)

A plurality of cylinder holes (2a) each formed of a metal plate and corresponding to a plurality of cylinder bores of a cylinder block to which a cylinder head of an internal combustion engine is assembled, and formed around each of the plurality of cylinder holes An annular bead (2b) having an angled cross-sectional shape, and a cooling water hole (2c) formed in an outer peripheral portion of each annular bead corresponding to the cooling water jacket of the cylinder block and the cooling water hole of the cylinder head Two substrates (2) having an outer peripheral bead (2d) having a one-sided cross-sectional shape formed at a position that entirely surrounds the annular bead and the cooling water hole, the annular beads (2b) In the cylinder-type laminated metal gasket (1), which are superposed so as to be aligned with each other in the thickness direction of the gasket,
An outer step adjustment plate (3) comprising a metal plate and extending from the position of the cooling water jacket to the position of the outer peripheral edge of the substrate (2);
It is made of a metal plate thicker than the outer step adjustment plate (3), and has a plurality of cylinder holes (4a) formed respectively corresponding to the plurality of cylinder holes (2a) of the substrate (2). An inner step adjustment plate (4) extending from the position of the inner periphery of the cylinder hole (4a) to the position of the cooling water jacket;
Inserted between the two substrates (2),
Fixing means (3f) is provided at a position corresponding to the position between the cylinder holes (2a) adjacent to each other of the substrate (2) of the outer step adjusting plate, and the substrate (2) of the inner step adjusting plate is arranged. The fixing means (4f) is provided at a position corresponding to a lateral position in a direction perpendicular to the alignment direction of the plurality of cylinder holes with respect to each cylinder hole (2a) of
The cylinder head laminate type, wherein the outer step adjusting plate and the inner step adjusting plate are fixed to only one of the two substrates (2) by the fixing means (3f, 4f), respectively. Metal gasket. A plurality of cylinder holes (2a) each formed of a metal plate and corresponding to a plurality of cylinder bores of a cylinder block to which a cylinder head of an internal combustion engine is assembled, and formed around each of the plurality of cylinder holes An annular bead (2b) having an angled cross-sectional shape, and a cooling water hole (2c) formed in an outer peripheral portion of each annular bead corresponding to the cooling water jacket of the cylinder block and the cooling water hole of the cylinder head Two substrates (2) having an outer peripheral bead (2d) having a one-sided cross-sectional shape formed at a position that entirely surrounds the annular bead and the cooling water hole, the annular beads (2b) In the cylinder-type laminated metal gasket (1), which are superposed so as to be aligned with each other in the thickness direction of the gasket,
An outer step adjustment plate (3) comprising a metal plate and extending from the position of the cooling water jacket to the position of the outer peripheral edge of the substrate (2);
It is made of a metal plate thicker than the outer step adjustment plate (3), and has a plurality of cylinder holes (4a) formed respectively corresponding to the plurality of cylinder holes (2a) of the substrate (2). An inner step adjustment plate (4) extending from the position of the inner periphery of the cylinder hole (4a) to the position of the cooling water jacket;
Inserted between the two substrates (2),
Fixing means (3f) is provided at a position corresponding to the position between the cylinder holes (2a) adjacent to each other of the substrate (2) of the outer step adjusting plate, and the substrate (2) of the inner step adjusting plate is arranged. The fixing means (4f) is provided at a position corresponding to a lateral position in a direction perpendicular to the alignment direction of the plurality of cylinder holes with respect to each cylinder hole (2a) of
The outer step adjustment plate (3) is fixed to one of the two substrates (2) by the fixing means (3f), and the inner step adjustment plate (4) is fixed to the fixing means (4f). ) by you, characterized in that fixed to the substrate (2) other of said two substrates, the laminated metal gasket for sheet cylinder over head. A plurality of cylinder holes (2a) each formed of a metal plate and corresponding to a plurality of cylinder bores of a cylinder block to which a cylinder head of an internal combustion engine is assembled, and formed around each of the plurality of cylinder holes An annular bead (2b) having an angled cross-sectional shape, and a cooling water hole (2c) formed in an outer peripheral portion of each annular bead corresponding to the cooling water jacket of the cylinder block and the cooling water hole of the cylinder head Two substrates (2) having an outer peripheral bead (2d) having a one-sided cross-sectional shape formed at a position that entirely surrounds the annular bead and the cooling water hole, the annular beads (2b) In the cylinder-type laminated metal gasket (1), which are superposed so as to be aligned with each other in the thickness direction of the gasket,
An outer step adjustment plate (3) comprising a metal plate and extending from the position of the cooling water jacket to the position of the outer peripheral edge of the substrate (2);
It is made of a metal plate thicker than the outer step adjustment plate (3), and has a plurality of cylinder holes (4a) formed respectively corresponding to the plurality of cylinder holes (2a) of the substrate (2). An inner step adjustment plate (4) extending from the position of the inner periphery of the cylinder hole (4a) to the position of the cooling water jacket;
Inserted between the two substrates (2),
Fixing means (3f) at the position corresponding to the lateral position of the outer step adjusting plate (3) in a direction perpendicular to the alignment direction of the plurality of cylinder holes with respect to the cylinder holes (2a) of the substrate (2). ) And a fixing means (4f) at a position corresponding to the position between the cylinder holes (2a) adjacent to each other on the substrate (2) of the inner step adjustment plate (4),
The cylinder head laminate type, wherein the outer step adjusting plate and the inner step adjusting plate are fixed to only one of the two substrates (2) by the fixing means (3f, 4f), respectively. Metal gasket. A plurality of cylinder holes (2a) each formed of a metal plate and corresponding to a plurality of cylinder bores of a cylinder block to which a cylinder head of an internal combustion engine is assembled, and formed around each of the plurality of cylinder holes An annular bead (2b) having an angled cross-sectional shape, and a cooling water hole (2c) formed in an outer peripheral portion of each annular bead corresponding to the cooling water jacket of the cylinder block and the cooling water hole of the cylinder head Two substrates (2) having an outer peripheral bead (2d) having a one-sided cross-sectional shape formed at a position that entirely surrounds the annular bead and the cooling water hole, the annular beads (2b) In the cylinder-type laminated metal gasket (1), which are superposed so as to be aligned with each other in the thickness direction of the gasket,
An outer step adjustment plate (3) comprising a metal plate and extending from the position of the cooling water jacket to the position of the outer peripheral edge of the substrate (2);
It is made of a metal plate thicker than the outer step adjustment plate (3), and has a plurality of cylinder holes (4a) formed respectively corresponding to the plurality of cylinder holes (2a) of the substrate (2). An inner step adjustment plate (4) extending from the position of the inner periphery of the cylinder hole (4a) to the position of the cooling water jacket;
Inserted between the two substrates (2),
Fixing means (3f) at the position corresponding to the lateral position of the outer step adjusting plate (3) in a direction perpendicular to the alignment direction of the plurality of cylinder holes with respect to the cylinder holes (2a) of the substrate (2). ) And a fixing means (4f) at a position corresponding to the position between the cylinder holes (2a) adjacent to each other on the substrate (2) of the inner step adjustment plate (4),
The outer step adjustment plate is fixed to one of the two substrates (2) by the fixing means (3f), and the inner step adjustment plate is fixed to the two sheets by the fixing means (4f). it characterized by being fixed to the other substrate out of the substrate (2), the multilayer metal gasket for sheet cylinder over head.   The laminated metal gasket for a cylinder head according to any one of claims 1 to 4, wherein the fixing means is at least one of a shear extrusion coupling portion (3f, 4f), a rivet, an eyelet, and a spot welded portion.   The inner step adjusting plate (4) includes an annular bead (4g) having a chevron cross-sectional shape formed around each of the plurality of cylinder holes (4a), and the annular beads and the substrate (2) are provided with the annular beads (4). The annular bead (2b) is disposed between the two substrates so as to be aligned with each other in the thickness direction of the gasket and to protrude in opposite directions. 5 to 5 are laminated metal gaskets for cylinder heads. Wherein the outer step adjustment plate (3) and said inner step adjustment plate (4) and each said fixing means (3f, 4f), characterized by being fixed to the lower side of the substrate (2), according to claim 1 or 3. A laminated metal gasket for a cylinder head according to 3 . The fixing means is a shear-extrusion joint (3f, 4f),
A shear extrusion coupling portion (3f) of the outer step adjustment plate (3) fixes the outer step adjustment plate (3) to the lower substrate (2) and a shear extrusion coupling portion (4f) of the inner step adjustment plate (4). ) Fix the inner step adjustment plate (4) to the upper substrate (2),
The lower substrate (2) does not overlap with the lower substrate (2) at the position corresponding to the shear extrusion coupling portion (4f) of the inner level adjustment plate (4) of the lower substrate (2). The laminated metal gasket for a cylinder head according to claim 2 or 4, wherein a relief hole (2h) is provided as described above. The fixing means is a shear-extrusion joint (3f, 4f),
The shear-extrusion coupling portion (3f) of the outer step adjustment plate (3) fixes the outer step-adjustment plate (3) to the upper substrate (2), and the shear-extrusion coupling portion (4f) of the inner step adjustment plate (4). Fixed the inner step adjustment plate (4) to the lower substrate (2),
The lower substrate (2) does not overlap with the lower substrate (2) at the position corresponding to the shear extrusion coupling portion (3f) of the outer step adjustment plate (3) of the lower substrate (2). The laminated metal gasket for a cylinder head according to claim 2 or 4, wherein a relief hole (2h) is provided as described above.

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