BEARING STRUCTURE AND SUPERCHARGER

摘要

A bearing structure (17) comprises: a bearing hole (2a) formed in a bearing housing (2); a semi-floating metal (7) received in the bearing hole and having a pin hole (7c) formed therein; a through-hole (2b) formed in the bearing housing (2) and provided facing the pin hole (7c) in the semi-floating metal (7); a restriction member (18) inserted in the through-hole (2b) and adapted such that, when the restriction member (18) is at an affixed position where the front end (18a) thereof located on the front end side in the insertion direction is inserted in the pin hole (7c), the fixation section (18b) of the restriction member (18), which is located closer to the base end side in the insertion direction than the front end (18a), is pressed by the inner surface of the through-hole (2b) and affixed to the bearing housing (2); a restriction hole (18e) open at the base end of the restriction member (18) in the insertion direction and extending toward the front end up to at least the affixation section (18b); and a pressing member (21) disposed in the restriction hole (18e) and pressing the inner surface of the restriction hole (18e) to expand the restriction hole (18e).