Patent Number: 8,721,484

Title: Speed reduction mechanism, and motor torque transmission device including the same

Abstract: In a reduction-transmission mechanism, a plurality of output members are arranged at such positions that a size that is the sum of a fitting clearance formed between an outer periphery of each output member and a corresponding one of needle roller bearings, a fitting clearance formed between the needle roller bearing and an inner periphery of an input member, which defines a corresponding one of a plurality of pin insertion holes, and a radial internal clearance in the needle roller bearing is smaller than a size that is the sum of a fitting clearance formed between a ball bearing and an outer periphery of an eccentric portion, a fitting clearance formed between the ball bearing and an inner periphery of the input member, which defines a center hole, and a radial internal clearance in the ball bearing.

Inventors: Suzuki; Kunihiko (Gamagori, JP), Takuno; Hiroshi (Nukata-gun, JP), Nomura; Keita (Kariya, JP), Matsukawa; Kazutaka (Kariya, JP), Kadota; Yasushi (Kitakatsuragi-gun, JP), Yamamoto; Takeshi (Izumisano, JP)

Assignee: JTEKT Corporation

International Classification: F16H 1/32 (20060101)

Expiration Date: 5/13/12018