Mitsuba Corporation

Nobuyuki Nagai

Teppei Tokizaki

Motoaki Kobayashi

Tohru Yumoto

A fifth ball bearing that rotatably supports a rotating shaft is provided on one side of a pinion gear in an axial direction of the rotating shaft. A sixth ball bearing that rotatably supports the rotating shaft is provided on the other side of the pinion gear in the axial direction of the rotating shaft. A carrier is provided with a bearing fixing portion that supports the fifth ball bearing immovably in the axial direction of the rotating shaft, and a bearing guide portion that supports the sixth ball bearing movably in the axial direction of the rotating shaft. The fifth and sixth ball bearings are provided so as not to be close to each other in the axial direction of the rotating shaft, and a female screw portion has a rattling adjustment member that presses the sixth ball bearing toward the side where the fifth ball bearing is provided.

Planetary gear reduction mechanism

A planetary gear reduction mechanism is capable of accurately driving an object to be driven. A carrieris provided with first and second support shaft fixing holesandto which a support shaftthat rotatably supports a planetary gearis fixed, and a shaft couplingis fixed to the carrierby a fixing pinfixed to the second support shaft fixing hole, which allows the shaft couplingto be accurately fixed to the carrierformed with high processing accuracy. Therefore, a planetary gear reduction mechanismis realized, which is capable of accurately driving a drive mechanism of a robot, which is an object to be driven.

Growing community of inventors

Gunma, Japan

Nobuyuki Nagai