公开(公告)号：US11428315B2

公开(公告)日：2022-08-30

申请号：US16737162

申请日：2020-01-08

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Tetsuo Hamajima ,  Kazuhiro Toyama ,  Shingo Iwatani ,  Tadashi Takagaki ,  Masataka Umemura

IPC: F16H63/18 ,  B23P15/00 ,  B21D51/02 ,  B23K1/00 ,  B23P17/00 ,  B23P19/02 ,  B23K101/04

Abstract: A method of manufacturing a driving drum includes: molding a first cylindrical member including first large- and small-diameter parts, a diameter of an outer circumferential surface of the first small-diameter part being smaller than that of the first large-diameter part; molding a second cylindrical member having second large- and small-diameter parts, a diameter of an inner circumferential surface of the second large-diameter part corresponding to the diameter of the outer circumferential surface of the first small-diameter part, a diameter of an inner circumferential surface of the second small-diameter part corresponding to that of the first small-diameter part, and the diameter of the inner circumferential surface of the second small-diameter part being smaller than that of the second large-diameter part; and forming a first cam groove between the first and second small-diameter parts and forming a second cam groove between the first and second large-diameter parts.