Sumitomo Heavy Industries, Ltd.

Tetsushi Isozaki

Kiyoji Minegishi

Katsumi Taki

Shigeo Watanabe

Aiko Hayashi

Isao Kohno

Mitsuo Ogamoto

Isao Kouno

There is provided a gear device including a motor having a motor shaft, a gear mechanism, a coupling that couples the motor shaft and an input shaft of the gear mechanism with each other, a first space accommodating the gear mechanism and holding a lubricant, a communication passage allowing the first space and a second space for accommodating the coupling to communicate with each other, and a blocking member disposed between the gear mechanism and the communication passage.

Gear device

Disclosed is a series and a series group of orthogonal gear reducers with motors. A motor cover is disposed separately from a gear box. In each of sub-series (frame number) wherein the gear boxes have the same fitting dimensions (sizes) to be mounted to a mating machines, the following requirements are satisfied: 1 The fitting dimension between the motor cover and the gear box is made constant; 2 An axial shifted amount between a hypoid pinion and a hypoid gear is made constant; 3 an outside diameter of the hypoid gear is made almost constant; and 4 a distance between the center of the hypoid gear, and the mounting surface for the motor cover and the gear box is made constant. Thus, it is possible to keep the required strength level of the hypoid gear set to be almost constant and to combine two kinds or more of the motors to one of the gear box by combining the hypoid pinion constituting the hypoid gear set having a low reduction ratio with a large capacity motor, and also combining the hypoid pinion constituting the hypoid gear set having a high reduction ratio to a small capacity motor. With this construction, it is possible to increase the parts for common use as much as possible while securing various combinations of motor capacities and reduction ratios, and hence to meet the requirements of users with cost reduction.

Series and a series-group of orthogonal gear reducers with motors

An output shaft is a hollow shaft and passes through a gearbox. Holes for mounting also pass through the gearbox. The holes are located at the vertexes of a square or rectangle. And the output shaft, which is displaced (offset) relative to the square's (or rectangle's) center, is located on one diagonal of the square. This structure provides a variety of possibilities of assembling the gear device with a big motor, and the amount of projection of the faces of the gearbox from the output shaft can be kept as small as possible.

Motor-equipped orthogonal gear device

Growing community of inventors

Ohbu, Japan

Tetsushi Isozaki