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摘要

PPROBLEM TO BE SOLVED: To provide a differential case for a differential device capable of maintaining performance of a differential gear contained inside. PSOLUTION: In this differential case 5, the differential gear 40 is contained inside, and when a vehicle is driven, it can be normally and reversely rotated by driving force from a transmission. Two first projections 13a and two second projections 13b are alternately formed on an outer circumferential surface CR of a large diameter part 12. Between the first projection 13a and the second projection 13b, opening parts 17a and 17b are respectively formed. A side surface 13c of the first projection 13a on the normal rotation side is acute to the outer circumferential surface CR. Between the second projection 13b and the second opening part 17b, a thick part 14 is formed in a first differential case 10. PCOPYRIGHT: (C)2005,JPO&NCIPI