JPH109052A - Cylinder head cover - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate a resin material having high strength, and reduce a cost by forming resin as a base material integratedly with a metal plate as a covering material for covering the surface of the base material, and forming the fitting-in groove of an elastic seal material on the lower end surface of the base material. SOLUTION: A cylinder head cover for covering the upper part of an engine in a vehicle is formed in a longitudinal narrow cup shape, a plurality of installing holes 10 are formed on its rim, and an oil filling hole is formed on its upper surface. A fitting-in groove 14 is formed continuously to all circumference on the lower end surface of the rim, and an elastic seal material 16 is fitted in the fitting-in groove 14. A rib 18 is formed on its back surface longitudinally and vertically. A baffle plate 22 on which multiple small holes are formed is installed on a small chamber in which the rib 18 is partitioned. The head cover is formed in such a constitution that resin as a base material 26 and a metal plate as a cover material 28 for covering the surface of the base material 26 are formed integratedly with each other. Namely, a metal plate on which adhesive is coated is set in a molding type, the resin is sprayed thereto, and the metal plate and the resin are integrated with each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylinder head cover for covering an upper portion of an engine (cylinder) of an automobile.

[0002]

2. Description of the Related Art Cylinder head covers (hereinafter referred to as head covers) are classified into metal heads and resin head covers. When joined to the cylinder head, the sealing property is ensured so that gas such as lubricating oil or blow-by gas of a valve mechanism provided in the head cover does not leak outside. In most cases, a groove is formed in the lower end surface (joining surface) of the head cover, and an elastic sealing material is fitted into the groove to achieve sealing.

[0003]

There are two types of metal head covers: a metal plate (specifically, an iron plate) formed by sheet metal processing, and an aluminum die-cast product. Since the groove is also formed by sheet metal processing, it cannot be formed uniformly, and the sealing with the elastic sealing material is not sufficient. On the other hand, the latter has a disadvantage that the cost of forming the fitting groove is high, but the product cost is high.

[0004] For this reason, recently, a head cover made of resin has been tried, but in order to obtain sufficient strength with resin, a high-strength resin material must be used.
It will be expensive. The present invention solves such a problem, and solves the problems of strength and sealability simultaneously by using a resin and a metal together.

[0005]

SUMMARY OF THE INVENTION In view of the above-mentioned problems, the present invention comprises a resin having a substrate as a base material and a metal plate as a covering material covering the surface of the base material, wherein the resin and the metal plate are integrally formed. In addition, the present invention provides a cylinder head cover in which a fitting groove for an elastic sealing material is formed on a lower end surface of a base material. In addition, the present invention provides a method in which the base material is a resin, the covering material covering the surface of the base material is a metal plate, and the covering material covering the surface of the covering material is resin, and the resin and the metal plate are integrally formed. In addition, the present invention provides a cylinder head cover characterized in that a fitting groove of an elastic sealing material is formed on a lower end surface of a base material. Further, the present invention provides a cylinder head cover characterized in that, in the above means, the lower end of the covering material is located above the lower end of the base material at a predetermined interval.

[0006] By taking the above measures, the present invention takes on the problem of processing such as the formability of the fitting groove by the resin, and the problem of strength by the metal, and the problems of strength, sealing and cost. At the same time.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a top perspective view of a head cover showing one embodiment of the present invention, FIG. 2 is a bottom perspective view, and FIG.
FIG. 1 is a sectional view taken along the line AA in FIG. 1. In general, the head cover has a long and thin cup shape, and has several mounting holes 10 on the edge and an oil injection hole 12 on the upper surface. Is formed. On the lower end surface of the edge, the above-described fitting groove 14 is formed continuously over the entire circumference (16 is an elastic sealing material fitted into the fitting groove 14).

On the other hand, ribs 18 are formed vertically and horizontally on the back surface, and a baffle plate 22 having many small holes is attached to a small chamber 20 defined by the ribs 18. The head cover is filled with lubricating oil droplets such as a valve mechanism, blow-by gas, and the like. The gas and liquid are separated by the baffle plate 22 so that only the gas escapes from the exhaust pipe 24 projecting from the small chamber 20. I have to.

According to the present invention, the head cover described above
6 is a resin, and the covering material 28 covering the surface of the base material 26 is made of a metal plate (an iron plate is most suitable), and is formed by integrally molding the resin and the metal plate. Specifically, a metal plate on which an adhesive is applied is set in a mold, and a resin is injected into the mold to integrate the two. As a result, the resin plays a role of a molding base material, and the metal plate plays a role of a strength material. As the resin material, an inexpensive material that does not require much strength can be used. Further, the fitting groove 14 of the elastic sealing material 16 is formed by a mold on the base material 26, that is, the lower end surface of the resin portion.

[0010] Vibration of the cylinder head during engine operation is also transmitted to the head cover, causing vibration and noise that may cause discomfort to the occupant. By using the above head cover, the resin and metal plate are integrated. The damping function works according to the configuration, and the vibration and noise are suppressed. In this case, it is preferable that the coating of the resin with the metal plate is not on the entire surface of the resin, but that the lower end of the metal plate is at a position above the lower end of the resin at a predetermined interval.
This is because the damping action of the resin works more strongly, and the effect of suppressing vibration and noise is further increased.

FIG. 4 shows another embodiment of the present invention.
FIG. 3 is a cross-sectional view taken along the line AA of FIG. 1, in which the surface of the covering member 28 is further covered with a resin covering member 30. In this case also, the resin and the metal plate are integrally formed. Specifically, a metal plate is set in a resin mold, and injection molding is performed so as to wrap the metal plate with resin. In addition, a method is also conceivable in which a head cover in which a resin is covered with a metal plate is set in a mold, and the resin is over-injected from above the metal plate. When adopting the thing of this aspect,
There is an advantage that the metal plate need not be coated and the cost is reduced. Since the painting cost is also high, the cost reduction by this method is large.

[0012]

Since the present invention has been described above, the following effects can be expected. a) Since a metal plate is used as a strength material and a resin is used as a molding base, a high-strength resin material is not required, and costs can be reduced. b) In this case, the fitting groove into which the elastic sealing material is fitted can be formed by a mold at the time of molding the resin, so that sufficient accuracy can be ensured. c) Vibration from the cylinder head can be suppressed by integrating the resin and the metal plate. In this case, by suppressing the metal plate from the lower end of the resin, the suppression effect can be further enhanced. d) If the surface of the metal plate is further coated with a resin, the metal plate does not need to be coated, so that the coating cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a top perspective view of a cylinder head cover showing an example of the present invention.

FIG. 2 is a bottom perspective view of a cylinder head cover showing an example of the present invention.

FIG. 3 is a sectional view taken along line AA of FIG. 1 showing an example of the present invention.

FIG. 4 is a cross-sectional view corresponding to AA in FIG. 1 showing another example of the present invention.

[Explanation of symbols]

 14 Fitting groove 16 Elastic sealing material 26 Base material 28 Covering material 30 Covering material

Claims (3)

[Claims] 1. A base material made of resin, and a cover material covering the surface of the base material made of a metal plate formed by integrally molding the resin and the metal plate, and a fitting groove of an elastic seal material on a lower end surface of the base material. A cylinder head cover characterized in that a cylinder head cover is formed. 2. A method in which the base material is a resin, the covering material covering the surface of the base material is a metal plate, and the covering material covering the surface of the covering material is a resin. A cylinder head cover, wherein a fitting groove for an elastic sealing material is formed on a lower end surface of a base material. 3. The cylinder head cover according to claim 1, wherein a lower end of the covering member is located at an upper position spaced from the lower end of the base by a predetermined distance.