| 摘要 |
PROBLEM TO BE SOLVED: To strengthen rigidity in joining by joining divided crankcases by using boss parts of casting bushes of case bearing parts. SOLUTION: The bushes A1 and A2 are cast into the respective bearing parts of the crankcases C<SB>1</SB>' and C<SB>2</SB>formed as left-right two pieces. The boss parts A1<SB>4</SB>, A1<SB>5</SB>, A2<SB>4</SB>, and A2<SB>5</SB>are respectively arranged in the bushes A1 and A2 for mutually joining the divided crankcases C<SB>1</SB>, and C<SB>2</SB>. Both divided crankcases C<SB>1</SB>, and C<SB>2</SB>are mutually joined by a bolt B<SB>3</SB>via a bolt hole B<SB>H3</SB>of the boss parts. Stud bolt fastening bosses A1<SB>2</SB>, A1<SB>3</SB>, A2<SB>2</SB>, and A2<SB>3</SB>are also integrally arranged in the bushes A1, and A2 for respectively joining the divided crankcases C<SB>1</SB>, and C<SB>2</SB>and a cylinder block C<SB>B</SB>. COPYRIGHT: (C)2005,JPO&NCIPI
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