Abstract: 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.

Abstract: 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.

Abstract: A motor with a helical pinion is made available as the motor for a hypoid geared motor. The hypoid geared motor includes a motor with a helical pinion formed on a motor shaft; a shaft member having an engagement portion integrally rotatable with the helical pinion at one end and having a hypoid pinion formed at the other end; and a hypoid gear to engage with the hypoid pinion.

Abstract: The gear system has a lubricant A put into an inner part of an oil seal provided around an input shaft, and a lubricant B put into an inner part of the reducer (gear system) which mainly lubricates a reducer portion. The characteristics of these lubricants A and B are set in such a manner that a base oil viscosity of the lubricant A is smaller than that of the latter lubricant B and a cone penetration of the lubricant A is larger than that of the lubricant B.

Abstract: A series of hypoid reducers (reducing devices) and a series of hypoid geared motors are provided in a wide variety at a low cost, which corresponds to many different speed reduction ratios and a low cost inventory. The hypoid reducers have a hypoid gear set including a hypoid pinion and a hypoid gear. The hypoid gear sets can have different speed reduction ratios and can be integrated into a gearbox common to the series hypoid reducers.

Abstract: 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.

Abstract: 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.