Dichte Verbindung zweier Teile, wovon jedes rechtwinklig zusammenstoßende Verbindungsoberflächen besitzt

摘要

Provided is a structure for joining a first part (e.g., a part constituted by a cylinder head and a front cover of an automotive internal combustion engine) having a pair of first and second internal joining surfaces meeting at right angles and a second part (e.g., a part constituted by a cam bracket of the engine) having a pair of first and second external joining surfaces meeting at right angles in such a manner that the first and second internal joining surfaces are respectively joined with the first and second external joining surfaces by interposing therebetween sealant for thereby providing a seal between the first internal joining surface and the first external joining surface and between the second internal joining surface and the second external joining surface. A pair of depressions are provided to the first external joining surface. A pair of projections are provided to the first internal joining surface for insertion into the depressions and thereby positioning the second part relative to the first part. A pair of slanted guide grooves are provided to inner circumferential surfaces of the depressions for guiding insertion of the projections into the depressions, respectively. Each of the guide grooves is disposed between each of the depressions and an edge at which the first and second external joining surfaces meet, and formed so as to expand each of the depressions increasingly toward an open end of each of the depressions.