JPH0710450U - Resin cylinder head cover - Google Patents

Abstract

(57) [Abstract] [Purpose] The object of the present invention is to provide a cylinder head cover that prevents deformation of the gasket guide particularly around the bolt holes. [Structure] A gasket guide 1a projecting on the bottom surface of the resin cylinder head cover 1 which has a mounting groove 2 on the outer periphery of the bottom surface and which is mounted on a cylinder head 6 via a bolt 5 and which forms the mounting groove 2. , 1a
Around the bolt hole 3 through which the bolt 5 is inserted is formed thicker than other portions.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement of a resin cylinder head cover.

[0002]

[Prior art and its problems]

 Conventionally, when a resin cylinder head cover is fixedly attached to a cylinder head via a bolt, a gasket is installed in a groove formed on the bottom surface of the cylinder head cover, and this gasket ensures the sealing performance. Conventionally, the thickness of the gasket guide that forms the groove for mounting the gasket was assumed to be uniform over the entire circumference. However, in such a structure, the volume of the gasket is larger than other parts around the bolt holes for the bolts that attach the cylinder head cover to the cylinder head, and in such parts, the reaction force of the rubber that constitutes the gasket is large. There was a problem that it became larger than other parts and the gasket guide was deformed.

[0003]

[Means for Solving the Problems]

 The present invention has been made in view of the above conventional problems, and an object thereof is not to provide a resin cylinder head cover that does not cause deformation of a gasket guide. The purpose is to be able to mount a gasket on the outer periphery of the bottom surface. In a resin cylinder head cover that has a mounting groove and is attached to the cylinder head via a bolt, the gasket guide that protrudes from the bottom surface that forms the insertion groove has a bolt hole surrounding the bolt hole that is deeper than other parts. That is, it is formed in a thick shape.

[0004]

[Action]

 The gasket guide that forms the mounting groove that protrudes from the bottom surface of the resin cylinder head cover has a thicker wall around the bolt holes than other parts. Even if is larger than other parts around the bolt hole, the gasket guide in this part is thick, so it can withstand the reaction force sufficiently and does not deform.

[0005]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a plan configuration diagram of a resin cylinder head cover, and FIG. 2 is a bottom configuration diagram thereof. A plurality of bolt holes are formed through the resin cylinder head cover 1 at predetermined positions on the outer peripheral side in a penetrating manner in the upward and downward directions. The bottom surface of the resin cylinder head cover 1 is recessed all around on the outer peripheral side. The mounting groove 2 is formed in a circular shape, and the gasket guides 1a, 1a projecting on the bottom surface are formed on the outer and inner sides of the mounting groove 2. The protruding gasket guides 1a, 1a are formed on the bottom surface over the entire circumference. It is integrally formed, and the mounting groove 2 is formed between the gasket guides 1a, 1a.

A gasket 4 is mounted in the mounting groove 2, and FIG. 3 shows an enlarged view of a cross section taken along the line AA of FIG. 1, and FIG. 4 shows a cross section taken along the line BB of FIG. An enlarged view is shown. With the gasket 4 mounted in the mounting groove 2, align the resin cylinder head cover 1 on the cylinder head 6 and insert the bolt 5 into each bolt hole 3 to form the bolt 5 on the cylinder head 6 side. The resin cylinder head cover 1 is fixed to the cylinder head 6 by screwing it into the formed screw hole 6 a and tightening it.

At this time, since the gasket 4 is pinched by the tightening of the fastening bolt 5, the reaction force of the gasket 4 is transmitted to the gasket guides 1a, 1a. In this example, as shown in FIG. The wall thickness t2 of the gasket guides 1a and 1a is larger than the wall thickness t1 of the other portions shown in FIG. 4 in the vicinity of the bolt hole 3 in FIG. In the vicinity of 3, the volume of the gasket 4 is larger than the other portions and the reaction force of the gasket 4 is also large, but since the thickness t2 of the gasket guide 1a is also formed to be large, the reaction of the gasket 4 is not enough. It can withstand the force, and the gasket guide 1a in this portion is not deformed.

[0008]

[Effect of device]

 According to the present invention, in a resin cylinder head cover which has a mounting groove on the outer periphery of the bottom surface for mounting a gasket and is mounted to a cylinder head through a bolt, a gasket guide protruding to the bottom surface forming the insertion groove inserts the bolt. Since the area around the bolt hole is thicker than the other parts, the thickness of the gasket guide around the bolt hole is large, so the reaction force of the gasket in this area is large. The gasket guide in this part can be prevented from being deformed well, and the resin cylinder head cover can be properly attached to the cylinder head without deformation.

[Brief description of drawings]

FIG. 1 is a plan view of a resin cylinder head cover.

FIG. 2 is a bottom view of FIG.

3 is an enlarged cross-sectional view taken along the line AA of FIG.

FIG. 4 is an enlarged cross-sectional view taken along the line BB of FIG.

[Explanation of symbols]

 1 Resin cylinder head cover 1a Gasket guide 2 Mounting groove 3 Bolt hole 4 Gasket 5 Bolt 6 Cylinder head 6a Screw hole

Claims (1)

[Scope of utility model registration request] 1. A resin cylinder head cover having a mounting groove on the outer periphery of a bottom surface for mounting a gasket, the resin cylinder head cover being mounted to a cylinder head via a bolt, wherein a gasket guide protruding to the bottom surface forming the insertion groove is A resin cylinder head cover, characterized in that the periphery of the bolt hole to be inserted is formed thicker than other portions.