Nabtesco Corporation

Takayuki Okimura

Koji Nakamura

Masahiro Takahashi

Mitsuru Shimamoto

Takashi Naruse

Takahiro Maekawa

Yuta Nagaya

An aspect of the present invention provides a speed reducer including a supporting block, an input gear rotatably supported on the supporting block, an intermediate gear meshing with the input gear, an output gear meshing with the intermediate gear, and a gear position changing mechanism configured to change a position of the intermediate gear relative to the input and output gears.

Gear mechanism, speed reducer and drive device using speed reducer

A gear mechanism according to the invention includes a first shaft, a second shaft disposed at an angle with the first shaft, a first gear group including a plurality of first gears that transmit rotation of the first shaft to the second shaft; and a second gear group including a plurality of second gears that transmit, to an output side, rotation of the second shaft transmitted from the first shaft. A first second gear is situated closest to the second shaft among the plurality of second gears, a last second gear is situated closest to the output side among the plurality of second gears. A straight line that connects a rotation center of the first second gear and a rotation center of the last second gear form an angle with the first shaft when viewed in a direction along the second shaft.

Speed reducer

A work positioner includes a first work retaining portion for retaining a first workpiece, a first drive portion for outputting a first rotational force about a first rotation axis and imparting a first angular movement about the first rotation axis to the first work retaining portion, a bearing portion supporting the first work retaining portion in cooperation with the first drive portion, a base arranged away from the first rotation axis, a first support column extending along a first support axis extending from the base toward the first rotation axis and supporting the first drive portion, and a second support column extending along a second support axis extending between the base and the first rotation axis so as to be parallel to the first support axis and supporting the bearing portion. The first support column includes a plurality of first support column pieces arranged along the first support axis.

Work positioner

Reduction gear

A gear device is provided with a crankshaft including a shaft main body and an eccentric portion, a linking member including external teeth and configured to transmit the rotation of the input gear to the crankshaft, a carrier configured to rotatably support the crankshaft, an oscillation gear oscillating and rotating, and an outer cylinder including internal teeth engaged with the oscillation gear. The carrier and the outer cylinder are configured to concentrically relatively rotate according to the rocking rotation of the oscillation gear. The linking member is configured to selectively take a first position where the external teeth are engaged with a first input gear and a second position where the external teeth are engaged with a second input gear.

Gear device

A gear device includes: a crankshaft that has an eccentric portion; an oscillation gear that has a plurality of external teeth and oscillating and rotating due to rotation of the eccentric portion; a carrier that rotatably supports the crankshaft; an outer cylinder that has a plurality of internal teeth respectively engaged with the external teeth of the oscillation gear; and a cylindrical portion that extends through the oscillation gear, the carrier, and the outer cylinder, wherein the carrier and the outer cylinder coaxially and relatively rotate due to oscillation and rotation of the oscillation gear, and wherein the cylindrical portion is disposed in either a rotational state, in which the cylindrical portion rotates, or a stationary state, in which the cylindrical portion does not rotate, depending on relative rotation of the carrier and the outer cylinder.

Growing community of inventors

Mie, Japan

Takayuki Okimura