Nabtesco Corporation

Shinji Inoue

Koji Nakamura

Ayaka Watanabe

Ryuji Matsusaka

Gearhead

A waterproof structure for a speed reducer according to one aspect of the disclosure includes: a speed reducer for decelerating a rotational driving force of an electric motor and transmitting the decelerated rotational driving force to a rotationally driven portion; a motor flange housing the speed reducer; a cover externally covering the speed reducer in a liquid-tight manner; and a holding plate and a first fixing bolt provided on an inner peripheral side of the cover to fix the cover to the motor flange.

Waterproof structure for speed reducer and rotation device

A joint according to one aspect of the disclosure includes: a joint body having an input gear meshing with a speed reduction mechanism, the joint body receiving an output shaft of a motor detachably coupled to the joint body; a motor flange disposed between the speed reduction mechanism and the motor and rotatably supporting the joint body; and an intermediate flange connecting between the motor flange and the motor. At least one fixing member for fixing the joint body and the output shaft to each other is provided at at least one position in the joint body that overlaps with the intermediate flange as viewed from a radial direction. The intermediate flange is formed as an annulus surrounding the joint body by a plurality of split pieces that can be split in a circumferential direction.

Joint and speed reducer

The present disclosure relates to a manufacturing method of a speed reducer. The speed reducer includes an outer tube, a shaft portion, an input shaft, a first bearing, a speed reducing portion, and an attachment member. The shaft portion has a first receiving surface and a shaft end surface. The outer tube has a second receiving surface. The first bearing has a first inner ring and a first outer ring. The first receiving surface contacts the first inner ring. The second receiving surface contacts the first outer ring. A first machining accuracy is obtained based on a first parallelism between the first receiving surface and the shaft end surface. A second machining accuracy is obtained based on a second parallelism between the second receiving surface and the flange mounting surface. The manufacturing method includes performing machining such that the first machining accuracy becomes higher than the second machining accuracy.

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Tokyo, Japan

Shinji Inoue