Jtekt Corporation

Hiroaki Sougumo

Shiro Nakano

Akihiko Shiina

Kosuke Yamanaka

Ryoichi Tokioka

Mitsuharu Ozaki

Hiroji Ueda

A telescopic shaft () has an inner shaft () and a tubular outer shaft () that are fitted to each other so that they can move relative to each other in the axial direction and that they can transmit torque to each other. A plurality of balls () are aligned between respective raceway grooves () of the inner shaft () and the outer shaft (). Limiting mechanisms (A;B) are provided that limit the amount of relative rotation to not more than a predetermined amount of the inner shaft () and the outer shaft () when a ball () comes off the raceway grooves (). The limiting mechanisms (A;B) include a pair of engagement sections () engageable with each other in a circumferential direction (C). The engagement sections () are provided at ridges () and recesses () that are adjacent to the raceway grooves () of the inner shaft () and the outer shaft (), respectively.

Telescopic shaft and vehicle steering apparatus

A planetary gear apparatus whose gears are all constituted by continuous shifted gears. A backlash between the input sun gear and each of the input side planetary gears is adjusted by pressing a second carrier plate supporting each integrated pair of the input side planetary gears and the output side planetary gears and moving it in the axial length direction by a ball bearing by a screwing operation of an adjusting nut. A backlash between the output sun gear and each of the output side planetary gears is also adjusted by pressing the output sun gear and moving it in the axial length direction by the ball bearing by the screwing operation of the adjusting nut. Accordingly, the backlash of all meshing portions can be adjusted during or after completion of the assemblage.

Planetary gear apparatus and steering apparatus with planetary gear apparatus

Growing community of inventors

Osaka, Japan

Hiroaki Sougumo