JP2018197580A - Gasket, and engine - Google Patents

Abstract

To provide a gasket capable of increasing the amount of liquid gasket to be filled therein and reducing a hardening time for the liquid gasket.SOLUTION: A gasket 1 is formed of rubber, and extended between each of a cylinder head 4 and a chain cover and a head cover 6, and liquid gasket 2 is filled in at least part of a region in the extending direction. The gasket 1 includes a body part 10 laid between each of the cylinder head 4 and the chain cover and the head cover 6, flat plate parts 11 provided on side faces 10a of the body part 10 along the extending direction, and protrusion parts 12 arranged at a lower end 10b of the body part 10 in a region where the liquid gasket 2 is filled, and protruded outward from the side face 10a of the body part 10, the flat plate parts 11 being each arranged at a space from the protrusion parts 12, the protrusion parts 12 being provided in plural number at spaces from each other in the extending direction.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a gasket in which a liquid gasket is used in combination, and an engine sealed by a gasket in which the liquid gasket is used in combination.

  2. Description of the Related Art Conventionally, in an engine such as an automobile, a gasket that seals between a plurality of members constituting the engine has been used to prevent leakage of oil or the like. For example, the gasket is formed of an elastic material such as rubber, inserted into a groove formed in one of the two members, and interposed between the other member. The gasket is elastically deformed between the two members, and a reaction force is generated on each member, thereby sealing between the two members.

  By the way, for example, in the case of an engine in which a head cover is provided on the upper part of a cylinder head and a chain cover, there are locations where the surfaces of the three members are aligned (hereinafter, this location is referred to as a “3-surface alignment portion”). is there. There may be a step in the three-surface mating portion due to a dimensional error of each member. For this reason, when the three members are sealed using a rubber gasket, a gap is generated between the gasket and the member due to the step, and the gasket does not generate a reaction force against the member. In order to improve the sealing performance at the three-surface mating portion, a method of using a liquid gasket (for example, FIPG (Formed In Place Gasket) in a region including the three-surface mating portion is known.

  For example, Patent Document 1 discloses a gasket that seals between a head cover, a chain cover, and a cylinder head. The gasket includes a body portion mounted in a groove provided in the head cover, a flat plate portion provided on one end side of the body portion, and a boundary portion of three members on a surface of the flat plate portion opposite to the body portion. And a liquid seal holding part provided in the region to be included. The liquid seal holding portion is composed of a plurality of convex portions and a plurality of concave portions, and is formed in a mesh shape by providing the plurality of convex portions in a lattice shape obliquely with respect to the longitudinal direction of the gasket. The liquid seal holding portion having such a shape is filled with a liquid seal (liquid gasket).

JP 2007-24210 A

  However, in the technique disclosed in Patent Document 1, since the liquid seal holding portion is formed on the lower surface of the flat plate portion with a width approximately equal to the width of the body portion, a large amount of liquid gasket cannot be secured, and the sealing performance is sufficient. May not be obtained. For example, since heat is generated when the engine is operated, the three members described above may thermally expand, and the step may change due to a difference in thermal expansion between the three members. Even in such a case, in order to ensure the sealing performance, the liquid gasket needs to follow the change in the level difference. However, if the filling amount of the liquid gasket is small, the change cannot be followed and the sealing performance may be deteriorated.

  By the way, when a liquid gasket is a moisture hardening type, it hardens | cures with the water | moisture content contained in the air. However, in the technique disclosed in Patent Document 1, since the liquid gasket is filled in the concave portion surrounded by the plurality of convex portions formed on the lower surface of the flat plate portion, the liquid gasket is difficult to touch the air. For this reason, it is difficult for the liquid gasket to proceed and it may take a relatively long time to cure.

  The present invention has been made to solve the above problems, and provides a gasket and an engine capable of increasing the filling amount of a liquid gasket and shortening the curing time of the liquid gasket. For the purpose.

  The gasket according to the present invention is a gasket that is formed of an elastic material, extends between sealed members, and is filled with a liquid gasket in at least a partial region in the extending direction, and is interposed between sealed members. A main body portion to be disposed and an end portion of the main body portion on the side where the liquid gasket is filled, and a protrusion portion protruding outward from the side surface of the main body portion. Are provided with a plurality of intervals in the extending direction.

  In the gasket according to the present invention, a plurality of protrusions are provided on the side surface of the main body part at intervals, and a liquid gasket holding part is formed by the plurality of protrusions. Thereby, according to the gasket which concerns on this invention, since a liquid gasket can be filled between adjacent protrusion parts on the outer side of a main-body part, the upper part of a protrusion part, etc., the filling amount of a liquid gasket can be increased. . By increasing the amount of the liquid gasket, the followability of the liquid gasket is improved and the sealing performance is improved. In addition, according to the gasket of the present invention, the liquid gasket is exposed to the air by filling the liquid gasket on the outside of the main body, so that the curing time of the liquid gasket can be shortened.

  In the gasket according to the present invention, the shape of the protrusion is preferably a substantially rectangular parallelepiped shape. The plurality of protrusions having such a shape can increase the filling amount of the liquid gasket.

  In the gasket according to the present invention, it is preferable that the plurality of protrusions are provided on both side surfaces of the main body. By configuring in this way, the liquid gasket can be filled between the protrusions on the both sides of the main body part, the upper part of the protrusions, and the like, so that the filling amount of the liquid gasket can be increased.

  In the gasket which concerns on this invention, it is preferable to provide the flat plate part provided along the extending direction in the side surface of a main-body part, and a flat plate part is arrange | positioned at intervals with respect to a projection part. By comprising in this way, a liquid gasket can be filled also between a flat plate part and a projection part, and the filling amount of a liquid gasket can be increased. In addition, it can confirm from the exterior whether the gasket is provided between the to-be-sealed members by providing a flat plate part.

  In the gasket which concerns on this invention, it is preferable that the length of a projection part is shorter than the width | variety of a flat plate part. With this configuration, the distance from the outermost (exposed to the air) liquid gasket to the innermost (main body) liquid gasket is not too long, and the main body liquid gasket is cured. Also proceed.

  In the gasket according to the present invention, it is preferable that the region filled with the liquid gasket includes a portion where three sealed members are combined. Even when a step is generated at the three-surface mating portion of the three sealed members, the liquid gasket can seal the region including the three-surface mating portion. In particular, a change in level difference can be followed by a large amount of liquid gasket, and sealing performance can be ensured.

  An engine according to the present invention is an engine in which three sealed members are sealed by a gasket in which a liquid gasket is used in combination. The gasket is a gasket having the above-described configuration, and the liquid gasket includes a plurality of protrusions. It is hold | maintained at the liquid gasket holding part comprised by the part.

  According to the engine of the present invention, the amount of the liquid gasket used in combination can be increased by using the gasket having the above-described configuration. With this large amount of liquid gasket, it is possible to seal the region including the three-surface mating portion of the three sealed members, and with the large amount of liquid gasket against the change in level difference formed on this three-surface mating portion. It can follow and seal property can be secured.

  According to the present invention, the filling amount of the liquid gasket can be increased, and the curing time of the liquid gasket can be shortened.

It is a side view which shows typically the three to-be-sealed members of the gasket and engine which concern on embodiment. It is sectional drawing along the II-II line | wire shown in FIG. It is a bottom view of the liquid gasket holding | maintenance part periphery of the gasket which concerns on embodiment. It is a side view of the liquid gasket holding | maintenance part periphery of the gasket which concerns on embodiment.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same reference numerals are used for the same or corresponding parts. Moreover, in each figure, the same code | symbol is attached | subjected to the same element and the overlapping description is abbreviate | omitted.

  With reference to FIGS. 1-4, the gasket 1 which concerns on embodiment is demonstrated. FIG. 1 is a side view schematically showing three sealed members 4, 5, 6 of the gasket 1 and the engine 3 according to the embodiment. FIG. 2 is a cross-sectional view taken along the line II-II shown in FIG. FIG. 3 is a bottom view of the periphery of the liquid gasket holding portion 14 of the gasket 1 according to the embodiment. FIG. 4 is a side view of the periphery of the liquid gasket holding portion 14 of the gasket 1 according to the embodiment. 2 to 4, the liquid gasket 2 is indicated by a dot pattern.

  The gasket 1 is used in an automobile engine 3 and is provided between three sealed members of the engine 3. For example, the gasket 1 is mounted between the cylinder head 4 and the chain cover 5 and the head cover 6, and extends along the lower end portion of the peripheral wall of the head cover 6 (the upper end portion of the cylinder head 4 and the chain cover 5). As shown in FIG. 4 and the like, a liquid gasket 2 is filled in a partial region in the direction D in which the gasket 1 extends. The liquid gasket 2 is filled in, for example, regions (two locations) including a three-surface matching portion 7 where the cylinder head 4, the chain cover 5, and the head cover 6 are matched.

  The chain cover 5 is fixed to the side portion of the cylinder head 4 by bolt fastening or the like. The head cover 6 is fixed to the upper part of the chain cover 5 and the cylinder head 4 by bolt fastening or the like. As shown in FIG. 2, a groove 6 b is formed on the lower surface 6 a of the peripheral wall of the head cover 6 for mounting the gasket 1.

  The gasket 1 is formed of an elastic material, for example, rubber. The gasket 1 is formed in an annular shape corresponding to the shape of the lower end of the peripheral wall of the head cover 6 (the upper end of the peripheral wall of the chain cover 5 and the cylinder head 4). The gasket 1 includes a main body portion 10, a pair of flat plate portions 11, a plurality of projecting portions 12, and a plurality of rib portions 13.

  The main body 10 is a portion that is elastically deformed and seals between the cylinder head 4 and the chain cover 5 and the head cover 6. The main body 10 is interposed between the cylinder head 4 and the chain cover 5 and the head cover 6, and most of the main body 10 is inserted into the groove 6 b of the head cover 6. The main body 10 is formed in an annular shape. As shown in FIG. 2, the cross-sectional shape of the main body 10 has a substantially semicircular shape at the upper end (the end on the side inserted into the groove 6b) and a substantially rectangular shape on the lower side. The height of the main body 10 is a predetermined amount higher than the depth of the groove 6 b of the head cover 6. The width of the main body 10 is slightly smaller than the width of the groove 6 b of the head cover 6.

  A pair of flat plate part 11 is a part for confirming from the exterior whether the gasket 1 is mounted | worn. When the main body 10 is inserted into the groove 6 b, the flat plate portion 11 is interposed between the upper surface 4 a of the peripheral wall of the cylinder head 4 and the upper surface 5 a of the peripheral wall of the chain cover 5 and the lower surface 6 a of the peripheral wall of the head cover 6. The flat plate portion 11 is provided on each of the side surfaces 10 a and 10 a of the main body portion 10 along the extending direction D of the gasket 1. The flat plate portion 11 is provided substantially perpendicular to the side surface 10a and protrudes from the side surface 10a. The flat plate portion 11 is formed in a flat plate shape having a predetermined thickness. The flat plate part 11 is a predetermined part of the side surface 10a of the main body part 10 where the main body part 10 protrudes from the groove 6b (particularly, a part spaced apart from the protrusion 12 arranged at the lower end part 10b of the main body part 10). ). The width of the flat plate portion 11 is substantially the same as the length from the side surface 10a of the main body portion 10 to the outer peripheral surface 6d of the peripheral wall of the head cover 6, as shown in FIG.

  The plurality of protrusions 12 are portions for holding the liquid gasket 2. The plurality of protrusions 12 are arranged in a region (a region including the three-surface mating portion 7) where the liquid gasket 2 is filled in the extending direction D of the gasket 1. The protrusion 12 is disposed at the lower end 10 b of the main body 10. A plurality of protrusions 12 are provided on each of the side surfaces 10 a and 10 a of the main body 10. As shown in FIG. 3, the plurality of protrusions 12 provided on each side surface 10 a are arranged at predetermined intervals in the extending direction D of the gasket 1. The protrusion 12 provided on the side surface 10a on one side of the main body 10 and the protrusion 12 provided on the side 10a on the other side of the main body 10 are arranged at the same position in the extending direction D, respectively.

  The protruding portion 12 is provided substantially perpendicular to the side surface 10a of the main body portion 10, and is formed so as to protrude outward from the side surface 10a. The shape of the protrusion 12 is, for example, a substantially rectangular parallelepiped shape. As shown in FIG. 2, the length of the protrusion 12 protruding from the side surface 10 a is shorter than the width of the flat plate portion 11, for example, approximately one quarter of the width of the flat plate portion 11.

  Thus, by providing the plurality of protrusions 12 on the side surface 10 a of the main body 10, a space (gap) is formed between the adjacent protrusions 12, 12, and between each protrusion 12 and the flat plate part 11. A space is formed. The liquid gasket 2 is filled in these spaces and the liquid gasket 2 is held. As described above, in the gasket 1, the liquid gasket holding portion 14 is formed by the plurality of protrusions 12 arranged at predetermined intervals. The liquid gasket holding portion 14 is disposed in a predetermined region in the extending direction D with the three-surface mating portion 7 being substantially at the center, for example, in a region of about several centimeters in the extending direction D. Depending on the length of this region, the number of protrusions 12 and a predetermined interval between the protrusions 12 are appropriately determined.

  The rib portion 13 is a portion provided for preventing the main body portion 10 from coming out of the groove 6 b of the head cover 6 and preventing the main body portion 10 from falling. The rib portion 13 contacts the side surface 6c of the groove 6b of the head cover 6 when the main body portion 10 is inserted into the groove 6b. A plurality of rib portions 13 are provided on each of the side surfaces 10 a and 10 a of the main body portion 10. The plurality of rib portions 13 provided on each side surface 10 a are arranged at predetermined intervals along the extending direction D of the gasket 1. For example, the rib portion 13 is formed in a convex shape on the side surface 10 a of the main body portion 10, and extends along the height direction of the main body portion 10. For example, as shown in FIG. 2, the rib portion 13 is provided in a range from the upper portion of the rectangular portion to the flat plate portion 11 along the height direction of the main body portion 10. The width of the rib portion 13 is, for example, approximately one half of the difference between the width of the groove 6 b of the head cover 6 and the width of the main body portion 10.

  The liquid gasket 2 is filled in the liquid gasket holding portion 14 in the gasket 1. The liquid gasket 2 is, for example, FIPG. The liquid gasket 2 is a moisture-curing liquid gasket. The liquid gasket 2 is cured by moisture in the air.

  The assembly and operation of the gasket 1 having the above-described configuration will be described. The main body 10 of the gasket 1 is inserted into the groove 6 b of the head cover 6. At this time, the main body portion 10 is inserted until the upper end portion 10c contacts the bottom surface 6e of the groove 6b. When the main body portion 10 is inserted, the plurality of rib portions 13 are in close contact with the side surfaces 6c and 6c of the groove 6b. The plurality of rib portions 13 do not contact each side surface 10a of the main body portion 10 and each side surface 6c of the groove 6b. A part of the main body part 10 on the lower end part 10b side (particularly, a part where the pair of flat plate parts 11 and the plurality of projecting parts 12 are provided) protrudes from the groove 6b. There is a gap between the flat plate portion 11 and the lower surface 6 a of the peripheral wall of the head cover 6.

  The liquid gasket 2 is filled in the liquid gasket holding portion 14 (around the plurality of protrusions 12) of the gasket 1. The amount of the liquid gasket 2 to be filled is, for example, an amount that sufficiently spreads over the entire liquid gasket holding portion 14. Then, the head cover 6 with the gasket 1 attached is disposed on the cylinder head 4 and the chain cover 5 and fixed to the cylinder head 4 and the chain cover 5 by bolt fastening. Thereby, the head cover 6 is assembled to the cylinder head 4 and the chain cover 5.

  By this assembly, the gasket 1 is mounted between the cylinder head 4 and the chain cover 5 and the head cover 6. Accordingly, the upper end portion 10c of the main body portion 10 is in close contact with the bottom surface 6e of the groove 6b, and the lower end portion 10b of the main body portion 10 is in close contact with the upper surface 4a of the cylinder head 4 and the upper surface 5a of the chain cover 5. In addition, the liquid gasket 2 is filled between the protrusion 12 and the protrusion 12 formed between the side surfaces 10a and 10a of the main body 10 of the gasket 1 and between the protrusion 12 and the flat plate portion 11, etc. Is retained.

  Thus, since the liquid gasket 2 is filled on the outside of the main body portion 10, a part of the liquid gasket 2 is exposed to the air and directly contacts the air. Therefore, the moisture-curing liquid gasket 2 easily absorbs moisture in the air, and the liquid gasket 2 is cured in a short time. When the liquid gasket 2 is cured, the adhesion of the liquid gasket 2 to the cylinder head 4, the chain cover 5, and the gasket 1 is improved, and the seal strength is improved. Further, since the liquid gasket 2 can be filled between the protrusion 12 and the protrusion 12 or between the protrusion 12 and the flat plate 11 on the outside of the main body 10, the filling amount of the liquid gasket 2 is large. .

  When the gasket 1 is attached, the main body 10 is sandwiched between the bottom surface 6e of the groove 6b of the head cover 6 and the top surface 4a of the cylinder head 4 and the top surface 5a of the chain cover 5 and elastically deforms. Due to this elastic deformation, a reaction force is generated on the main body 10 against the cylinder head 4 and the chain cover 5, and a reaction force is generated on the head cover 6. The body 10 seals between the cylinder head 4 and the chain cover 5 and the head cover 6.

  Incidentally, as shown in FIG. 4, if there is a step 7 a in the three-surface mating portion 7 (particularly between the cylinder head 4 and the chain cover 5), there is a gap between the gasket 1 and the cylinder head 4 or the chain cover 5. I can do. Since the gasket 1 is provided with the liquid gasket holding portion 14 corresponding to the three-surface mating portion 7, the liquid gasket 2 is also filled in such a gap I. The liquid gasket 2 filled in the liquid gasket holding portion 14 and cured to seal a region (particularly, the gap I) including the three-surface mating portion 7.

  In particular, a large amount of the liquid gasket 2 is held outside the main body portion 10 by the liquid gasket holding portion 14 of the gasket 1. Therefore, the sealing performance by the liquid gasket 2 is improved. For example, even when the step 7a (gap I) changes due to the difference in thermal expansion between the cylinder head 4 and the chain cover 5 due to the heat generated in the engine 2 when the engine 2 is in operation, the liquid gasket 2 follows the change. can do.

  According to the gasket 1 according to the embodiment, the liquid gasket 2 is filled on the outside of the main body 10 by providing the liquid gasket holding portions 14 including the plurality of protrusions 12 on the side surfaces 10 a and 10 a of the main body 10. Therefore, the filling amount (and therefore the amount) of the liquid gasket 2 can be increased. By increasing the amount of the liquid gasket 2, the followability of the liquid gasket 2 is improved, and the sealing performance is improved. In particular, even in the case where the gap I is formed by the step 7a in the three-sided joint portion 7 of the cylinder head 4 and the chain cover 5 and the head cover 6, the sealing performance can be ensured, and the step 7a (gap I) has changed. Even in this case, the sealing performance can be ensured.

  According to the gasket 1 according to the embodiment, by providing the liquid gasket holding portion 14 on the side surface 10a of the main body portion 10, the liquid gasket 2 is filled in the air by filling the liquid gasket 2 outside the main body portion 10. Since it is exposed, the curing time of the liquid gasket 2 can be shortened. For example, even in the case where an engine completion inspection is performed after the completion of engine assembly in an automobile engine assembly line, the liquid gasket can be cured before the engine 2 is operated in the inspection.

  According to the gasket 1 according to the embodiment, the liquid gasket 2 can be filled between the flat plate portion 11 and the protruding portion 12 by disposing the protruding portion 12 with an interval from the flat plate portion 11. The filling amount of the liquid gasket 2 can be increased. Moreover, according to the gasket 1 which concerns on embodiment, the length of the projection part 12 is made shorter than the width | variety of the flat plate part 11 (for example, it makes it about one quarter), and is exposed to the outermost side (it exposes to air). The distance from the liquid gasket 2 on the inner side to the innermost liquid gasket 2 (on the main body 10 side) does not become too long, and the liquid gasket 2 on the main body 10 side also hardens.

  Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications can be made. For example, in the embodiment, the example in which the gasket 1 that uses the liquid gasket 2 is applied to the seal between the cylinder head 4 and the chain cover 5 of the automobile engine 3 and the head cover 6 is shown. For example, the present invention may be applied between the other three members of the automobile, or may be applied to other than the automobile. In particular, it is suitable for a step where there is a step at the three-surface mating portion where the surfaces of the three members are aligned.

  In the above-described embodiment, a rectangular parallelepiped shape is shown as an example of the shape of the projecting portion 12, but the shape of the projecting portion 12 may be other shapes, for example, the tip side of the projecting portion 12 is substantially conical or hemispherical. It is good also as a shape.

  In the above embodiment, the protrusion 12 provided on the side surface 10 a on one side of the main body 10 and the protrusion 12 provided on the other side surface 10 a of the main body 10 are arranged at the same position in the extending direction D of the gasket 1. Although it was set as the structure, you may arrange | position the protrusion part 12 of the side surface 10a of one side, and the protrusion part 12 of the side surface 10a of the other side in the extension direction D at a staggered position.

  In the above embodiment, the lower end surface of the main body portion 10 and the protrusion portion 12 is a flat surface. However, in order to hold the liquid gasket 2, a concave portion or a convex portion is formed on the lower end surface of the main body portion 10 or the protrusion portion 12. For example, a mesh-shaped convex portion (a concave portion surrounded by the convex portion) may be formed.

DESCRIPTION OF SYMBOLS 1 Gasket 2 Liquid gasket 3 Engine 4 Cylinder head 5 Chain cover 6 Head cover 7 3 surface alignment part 10 Main body part 10a Side surface 11 Flat plate part 12 Projection part 13 Rib part 14 Liquid gasket holding part

Claims (7)

A gasket that is formed of an elastic material, extends between sealed members, and is filled with a liquid gasket in at least a partial region in the extending direction,
A main body interposed between the sealed members;
A protrusion that is disposed in an area where the liquid gasket is filled and an end of the main body on the side where the liquid gasket is filled, and protrudes outward from a side surface of the main body;
With
A plurality of the protrusions are provided at intervals in the extending direction.   The gasket according to claim 1, wherein the shape of the protrusion is a substantially rectangular parallelepiped shape.   The gasket according to claim 1 or 2, wherein the plurality of protrusions are provided on both side surfaces of the main body. A flat plate provided on the side surface of the main body along the extending direction;
The said flat plate part is arrange | positioned at intervals with respect to the said projection part, The gasket as described in any one of Claims 1-3 characterized by the above-mentioned.   The gasket according to claim 4, wherein a length of the protruding portion is shorter than a width of the flat plate portion.   6. The gasket according to any one of claims 1 to 5, wherein the region filled with the liquid gasket includes a portion where the three sealed members are combined. An engine in which three sealed members are sealed by a gasket in combination with a liquid gasket,
The gasket is the gasket according to claim 6,
The engine is characterized in that the liquid gasket is held by a liquid gasket holding portion constituted by a plurality of the protrusions.

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