ELECTRIC SUPERCHARGER

摘要

An electric supercharger wherein the assemblability of a bearing holding structure is improved is provided. An electric motor 30 of an electric supercharger 101 has a shaft 22. A second bearing 24 supports the shaft 22 rotatably. The second bearing 24 comprises an outer ring 24a and an inner ring 24b rotatable with respect to each other. A second bearing sleeve 26 supports the outer ring 24a as a fixed ring. A key ring 51 positions the outer ring 24a with respect to the second bearing sleeve 26. A preloading spring 52 energizes the key ring 51 toward the outer ring 24a or the second bearing sleeve 26.