JPH028158Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a head cover structure having a gasket on the edge of the opening, and in particular, the invention relates to a head cover structure that has a gasket on the edge of the opening. The present invention relates to an engine head cover structure that can effectively secure space for housed parts.

[Conventional technology]

FIG. 5 shows the structure of a conventional engine head cover. As shown in the figure, the edge of the opening of the head cover 1, which is opened to accommodate engine parts, is fitted with a packing to ensure the sealability of the installation. 2 is inserted. In order to fit and support this packing 2, the head cover 1 is
The opening edge of the plate member 3 is folded back outward to form a step inside the head cover 1 so as to have a substantially L-shaped cross section, and the plate member 3 is folded back to form a gasket receiving groove for accommodating the gasket 2. It is adapted to be fixed to the inner wall of the head cover 1.

By the way, various parts are assembled inside the head cover 1, but since the inside of the head cover 1 is narrow, even if an overhang part is provided (for example,
(No. 58-109526) Some parts are housed so as to be in contact with the inner wall of the head cover 1. For example, due to its structure, the valve spring 4 may be set just as close to the inner wall of the head cover 1. For this reason, the plate member 3 becomes a hindrance as it adheres to the inner wall of the head cover 1 in order to fit the gasket 2 therein.

Therefore, conventionally, the plate member 3 facing the valve spring 4 is cut out over the entire length in the width direction, thereby securing a space for the valve spring 4 inside the head cover 1.

Note that 5 in the figure is a head bolt.

[The problem that the idea attempts to solve]

By the way, if there is a notch 6 in the plate member 3 that faces the valve spring 4 to accommodate it, the gasket 2 will directly face the valve spring 4, as shown in FIG. For this reason, Patsukin 2
Depending on how it is assembled, the seal 2 may fall inward, causing interference between the valve spring 4 and the seal 2.
There were problems such as breakage of the gasket 2 and oil leakage.

SUMMARY OF THE INVENTION An object of the present invention is to provide an engine head cover structure that can prevent interference between the packing and the housed parts while ensuring a space for housing the parts housed in the head cover.

[Means to solve the problem]

The present invention includes folding the head cover outward to form a stepped portion at the edge of the opening of the head cover, and making a plate member stand up along the inside of the stepped portion from the inner wall of the cover, which is a non-folded portion. The plate member, which forms a gasket housing groove and faces the components to be accommodated so as to be in contact with the inner wall of the cover, is folded into the stepped portion by cutting out the joint with the inner wall of the cover.

[Effect]

By cutting out the joint portion of the plate member facing the components housed in the head cover, a space for housing the components housed in the inner wall of the cover can be secured, and the plate member can be inserted into the step at the edge of the opening. By folding it in, it supports the packing and prevents the packing from breaking.

〔Example〕

Hereinafter, a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

As shown in FIGS. 1 and 2, a head cover 1 is formed to be attached to the engine body.
This head cover 1 has an opening 1a formed therein to accommodate and cover parts such as a valve spring 4.

An opening edge 7 is formed on the head cover 1 to define the opening 1a thereof, and a stepped portion 7a is formed on the opening edge 7 by folding it outward into an L-shaped cross section. . That is, as shown in FIGS. 2 and 3, the opening edge 7 is folded back to expand the diameter outward and further folded up to form the raised edge 7b, thereby opening the opening to the inside of the head cover 1. A stepped portion 7a is formed.

Further, a packing receiving groove 8 for accommodating the packing 2 is formed in the opening edge 7, and this packing receiving groove 8 is formed by raising a plate member 9 along the inside of the stepped portion 7a. That is, inside the head cover 1 there is a cover inner wall 1 which is a non-folded part.
c is formed, and one side of the plate member 9 is joined by spot welding or the like along the inner wall 1c of the cover, and the other side is a raised edge 7b.
A packing receiving groove 8 is formed in parallel to the groove 8 . 10 is a welding part.

Therefore, one side of the plate member 9 forms a joint 9a that overlaps and joins the cover inner wall 1c, and the other side stands up along the step 7a to attach the packing 2. A supporting portion 9b is formed.

In particular, in the plate member 9 that faces parts such as the valve spring 4 housed in the head cover 1, the joint portion 9a thereof is cut out to have a rectangular cross section to form a notch 11, and the support portion 9b is cut out from the stepped portion 7.
It is designed to be folded inside a. In other words,
As shown in FIG. 4, the joint 9a of the plate member 9
By cutting out the joint part 9a, the cover inner wall 1c, which is a non-folded part facing the joint part 9a, is exposed inside the head cover 1, and by cutting out the joint part 9a, the remaining support part 9b is stepped by the thickness thereof. The folded part 12 is formed by folding into the inner part 7a to have a substantially U-shaped cross section to form a packing receiving groove 8 having a narrow groove width.

Therefore, the packing 2 is formed with a substantially U-shaped open engagement groove 13 for covering and accommodating the folded part 12 and for engaging the folded part 12. The part of the gasket 2 is formed to be thin.

Therefore, when setting the valve spring 4 in the head cover 1, the plate member 9 facing the valve spring 4 is installed by cutting out the joint part 9a and folding it into the stepped part 7a. The cover inner wall 1c is exposed through the cover inner wall 1c, and the valve spring 4 can be accommodated so as to be in contact with the cover inner wall 1c. Therefore, the valve spring 4 can be accommodated by effectively utilizing the narrow accommodation space within the head cover 1.

Further, the valve spring 4 is set, and the gasket 2 facing the valve spring 4 is attached to the folded portion 1 of the plate member 9.
2 along the step 7a. Therefore, the folded part 12 of the plate member 9 is interposed between the valve spring 4 and the packing 2, which prevents the packing 2 from falling into the head cover 1 and prevents the packing from falling. It is possible to prevent interference between the seal 2 and the valve spring 4, breakage of the seal, or oil leakage.

[Effects of the invention] In summary, according to the present invention, the plate member that faces the components to be housed so as to be in contact with the inner wall of the cover is folded into the step at the edge of the opening by cutting out the joint with the inner wall of the cover. , it is possible to prevent the packing from falling down and falling off from the packing housing groove, and it is possible to prevent the occurrence of interference between the packing and the parts.

[Brief explanation of drawings]

Fig. 1 is a bottom view showing a preferred embodiment of the engine head cover structure according to this invention, Fig. 2 is a sectional view taken along the - line in Fig. 1, and Fig. 3 is a sectional view taken along the - line in Fig. 1. 4 is an exploded perspective view, FIG. 5 is a bottom view showing a conventional head cover structure, and FIG. 6 is a cross-sectional view taken along the - line in FIG. 5. In the figure, 1 is a head cover, 2 is a packing, 4 is a valve spring which is an example of parts, 7 is an opening edge, 7a is a step, 8 is a packing receiving groove, 9 is a plate member, and 9a is a joint. .

Claims (1)

[Scope of utility model registration request] At the edge of the opening of the head cover, fold it back outward to form a step, and on the inside of the step,
Along this line, a plate member is made to stand up from the inner wall of the cover, which is a non-folding part, to form a packing housing groove, and the plate member facing the parts to be accommodated is connected to the inner wall of the cover so as to be in contact with the inner wall of the cover. The engine head cover structure is made by cutting out and folding it into the stepped part.