Abstract: An electric-powered vehicle includes: an axle body that includes an axle and drive wheels connected to both ends of the axle; a magnetic geared motor for rotating the axle, the magnetic geared motor including a stator, a low-speed rotor, and a high-speed rotor; a vehicle structure supported by the axle body; a motor support for connecting the vehicle structure and the stator, and supporting the magnetic geared motor by the vehicle structure; and an elastic coupling for coupling the low-speed rotor and the axle such that a rotational force of the low-speed rotor is transmittable to the axle.

Abstract: A drive device for an electric vehicle includes: a motor configured to be in a drive wheel of the electric wheel; and a reduction gear configured to reduce rotational speed of the motor and transmit resultant rotation to the drive wheel; the reduction gear including a sun gear configured to be driven by the motor, a first planetary gear that is configured to mesh with the sun gear and has a first number of teeth, a fixed ring gear that is meshed with the first planetary gear and arranged non-rotatably, a second planetary gear that is coupled to the first planetary gear and has a second number of teeth that is smaller than the first number of teeth, a movable ring gear that is meshed with the second planetary gear and arranged rotatably, and a transmission member configured to transmit rotation of the movable ring gear to the drive wheel.

Abstract: A hydrofoil craft includes a hull including a bottom that spreads from a bow to a stern; and a hydrofoil mechanism provided on the bow side of the hull. The hull further includes an accommodating recess formed therein, and the accommodating recess is recessed toward the stern side between the bow and the bottom to accommodate the hydrofoil mechanism. A retreat surface is formed between the bottom and a recess main surface facing the bow side in the accommodating recess, and the retreat surface extends toward the stern side in a downward direction and is connected to the bottom.

Abstract: A power transmission device includes a first power transmission path for transmitting a driving force of a motor to one driven shaft, and a second power transmission path for transmitting the driving force of the motor to another driven shaft. At least one of the first power transmission path or the second power transmission path includes a first intermediate rotor fixed to an output shaft of the motor, a second intermediate rotor rotated by the first intermediate rotor and moving arcuately along an outer circumference of the first intermediate rotor, a driving shaft rotated by the second intermediate rotor and transmitting the driving force to the one driven shaft or the another driven shaft. The driving shaft is configured to move in a direction perpendicular to an axial center direction of the driving shaft in accordance with movement of the second intermediate rotor around the first intermediate rotor.

Abstract: A tooth surface shape design support device for supporting design of a tooth surface shape of a gear includes a principal component shape data acquisition unit configured to acquire a plurality of principal component shape data obtained by performing principal component analysis on a tooth surface shape sample data group including a plurality of tooth surface shape sample data indicating samples of the tooth surface shape, and a tooth surface shape evaluation unit configured to evaluate a tooth surface shape defined by using the plurality of principal component shape data acquired by the principal component shape data acquisition unit.

Abstract: A hydrofoil craft includes: a hull including a bottom that spreads from a bow to a stern; and a hydrofoil mechanism provided on the bow side of the hull. The hull includes an accommodating recess formed therein, the accommodating recess being recessed toward the stern side between the bow and the bottom to accommodate the hydrofoil mechanism. A retreat surface is formed between the bottom and a recess main surface facing the bow side in the accommodating recess, the retreat surface extending toward the stern side in a downward direction and being connected to the bottom.

Abstract: A drive device for an electric vehicle includes: an in-wheel motor; and a reduction gear that reduces rotational speed of the in-wheel motor and transmits resultant rotation to a drive wheel of the electric vehicle; the reduction gear including a sun gear driven by the in-wheel motor, a first planetary gear that is arranged to be meshed with the sun gear and has a first number of teeth, a fixed ring gear that is meshed with the first planetary gear and arranged non-rotatably, a second planetary gear that is coupled to the first planetary gear and has a second number of teeth that is smaller than the first number of teeth, a movable ring gear that is meshed with the second planetary gear and arranged rotatably, and a transmission member that transmits rotation of the movable ring gear to the drive wheel.

Abstract: A power transmission device includes a first power transmission path for transmitting a driving force of a motor to one driven shaft, and a second power transmission path for transmitting the driving force of the motor to another driven shaft. At least one of the first power transmission path or the second power transmission path includes a first intermediate rotor fixed to an output shaft of the motor, a second intermediate rotor rotated by the first intermediate rotor and moving arcuately along an outer circumference of the first intermediate rotor, a driving shaft rotated by the second intermediate rotor and transmitting the driving force to the one driven shaft or the another driven shaft. The driving shaft is configured to move in a direction perpendicular to an axial center direction of the driving shaft in accordance with movement of the second intermediate rotor around the first intermediate rotor.

Abstract: Disclosed is a lubricant sealing structure for a gear coupling, which can firmly prevent the leaking of the lubricant due to vibration or the like in the axial and radial directions inside the gear coupling. A sealing member is a cloth-inserted rubber 21 having flexibility. The cloth-inserted rubber 21 has a first end being fixed to a fixing member 24s on a cover plate 20 mounted on a side of an outer ring 7 and a second end being fixed to another fixing member 25s on a side of the drive shaft 10 in liquid tight manner in the axial direction of a drive shaft 10. Each of the first and second ends of the cloth-inserted rubber 21 has a face extending in a direction that is perpendicular to the axial direction. The cloth-inserted rubber 21 seals the lubricant at the face of said each of the first and second ends.

Abstract: An impact load monitoring system for a wind turbine for wind power generation is provided with: an acceleration sensor 28 attached to a step-up gear 18 connected to a main shaft 20; a frequency filter 30 for extracting a monitoring-object component contained in a target frequency domain from vibration data representing a temporal change of amplitude of the acceleration obtained by the acceleration sensor 28; and a determination unit 32 for determining whether or not amplitude of acceleration of the monitoring-object component exceeds a reference value which is set in advance, by comparing the amplitude of the acceleration with the reference value.

Abstract: In an object to provide a gear box for a wind turbine generator and a wind turbine generator in which the life of the planet bearings are further enhanced, a gear box of the present invention includes a casing, a carrier, planet pins held to the carrier, planet bearings supported to the planet pins, respectively, a plurality of planet gears supported to the planet pin via the planet bearings, respectively, and a ring gear and a sun gear meshed with the planet gears. In the gear box, the carrier has an inclined surface facing the planet bearing as a part of an outer cylinder part provided on both ends of the planet pins in axial direction of the planet pin and surrounding the outer circumference of the both ends of the planet pins and the incline surface inclines such that the farther from an axial center of the planet pin, the longer a distance between the inclined surface and the planet bearing.

Abstract: Disclosed is a lubricant sealing structure for a gear coupling, which can firmly prevent the leaking of the lubricant due to vibration or the like in the axial and radial directions inside the gear coupling. A sealing member is a cloth-inserted rubber 21 having flexibility. The cloth-inserted rubber 21 has a first end being fixed to a fixing member 24s on a cover plate 20 mounted on a side of an outer ring 7 and a second end being fixed to another fixing member 25s on a side of the drive shaft 10 in liquid tight manner in the axial direction of a drive shaft 10. Each of the first and second ends of the cloth-inserted rubber 21 has a face extending in a direction that is perpendicular to the axial direction. The cloth-inserted rubber 21 seals the lubricant at the face of said each of the first and second ends.

Abstract: The present invention provides a gear box for a wind turbine generator which can reduce damage by flaking even when a self-aligning roller bearing is adopted as a planet bearing and a wind turbine generator. The gear box 14 comprises a casing 40; a carrier 52; a plurality of planet pins 54 supported to the carrier 52; self-aligning roller bearings 56 held on the planet pins 54, respectively; the planet gears 58 supported to the planet pins 54 via the self-aligning roller bearing 56, respectively; and a ring gear 60 and a sun gear 62 meshed with the planet gears 58. The planet gears 58 are fixed to the outer race 56B of the self-aligning bearing 56 with an interference fit, respectively, so that each end surface of the outer race 56B of the self-aligning bearing 56 is positioned inner side to an end surface of each planet gears 58.

Abstract: A wind turbine generator including a low-cost drive train that allows for reduced weight and reduced length in the axial direction is provided. In a wind turbine generator that generates electricity by driving a generator coupled, by means of a drive train, to a rotor head that has wind-turbine rotor blades attached thereto and rotates together therewith, a gear box (20) of the drive train that transmits torque from the rotor head to the generator includes a star-type gear-box mechanism serving as a first-stage gear-box unit and integrated with a main bearing (50).

Abstract: In an object to provide a gear box for a wind turbine generator and a wind turbine generator in which the life of the planet bearings are further enhanced, a gear box of the present invention includes a casing, a carrier, planet pins held to the carrier, planet bearings supported to the planet pins, respectively, a plurality of planet gears supported to the planet pin via the planet bearings, respectively, and a ring gear and a sun gear meshed with the planet gears. In the gear box, the carrier has an inclined surface facing the planet bearing as a part of an outer cylinder part provided on both ends of the planet pins in axial direction of the planet pin and surrounding the outer circumference of the both ends of the planet pins and the incline surface inclines such that the farther from an axial center of the planet pin, the longer a distance between the inclined surface and the planet bearing.

Abstract: A sun-and-planet speed-up gear includes a low-speed-stage sun-and-planet gearing and a high-speed-stage sun-and-planet gearing, in which an input shaft is connected to a low-speed-stage ring gear, the position of a shaft of a low-speed-stage planet gear is secured, a shaft of a low-speed-stage sun gear is connected to a high-speed-stage carrier, and an output shaft is connected to a high-speed-stage sun gear. In order to automatically center the low-speed-stage sun gear to prevent damage to gears and a bearing, a flange formed at a tip of the shaft of the low-speed-stage sun gear and a flange formed at a tip of a coupling that is directly attached to the high-speed-stage carrier or that is formed on the high-speed-stage carrier are coupled via a sleeve.

Abstract: A wind-turbine-generator-system transmission and a wind turbine generator that can ensure the strength of a bearing and can also minimize seizing and abrasion are provided. In a wind-turbine-generator-system transmission having a sun gear, a planetary gear that meshes with the sun gear and rotates around the sun gear, and an inner tooth that meshes with the planetary gear, the transmission includes a carrier that rotates the planetary gear around the sun gear; a planetary pin that is disposed in the carrier and transmits rotation of the carrier to the planetary gear; a cylindrical sleeve disposed around a periphery of the planetary pin; and a slide bearing that is disposed between the sleeve and the planetary gear and supports the planetary gear in a rotatable manner about the planetary pin.

Abstract: A power generating wind turbine includes parts and components installed in or on a nacelle which are made smaller and lighter, thus facilitating maintenance. A main shaft 11, a gear-box for speeding up rotation of the main shaft 11 and a generator 13 driven by an output of the gear-box 11 are provided on a nacelle bed plate 6. The main shaft 11 is connected to an input shaft 12a end of the gear-box 12 via a double-row tapered roller bearing 16. The main shaft 11 is supported to a wall portion W1 of the nacelle bed plate 6 with the double-row tapered roller bearing 16 being interposed therebetween. The main shaft 11 is formed in an annular shape having its outer diameter D1 larger than its axial directional length L1.

Abstract: A wind turbine generator including a nacelle having reduced size and weight is provided. The wind turbine generator includes a nacelle disposed on a tower. The nacelle includes a main shaft that is connected to a rotor head equipped with blades and that integrally rotates with the rotor head, a gearbox that increases the rotational speed of the main shaft and that outputs the resulting rotational speed, and a generator driven by the output from the gearbox. In the wind turbine generator, a drivetrain extending from the main shaft to the generator via the gearbox is disposed in the rotor head.

Abstract: Provided is a power generating wind turbine in which parts and compoments installed in or on a nacelle are made smaller and lighter and maintenance is facilitated. A main shaft 11, a gear-box speeding up rotation of the main shaft 11 and a generator 13 driven by output of the gear-box 11 are provided on a nacelle bed plate 6. The main shaft 11 is connected to an input shaft 12a end of the gear-box 12 via a double-row tapered roller bearing 16. The main shaft 11 is supported to be fitted to a wall portion W1 of the nacelle bed plate 6 with the double-row tapered roller bearing 16 being interposed therebetween. The main shaft 11 is formed in an annular shape having its outer diameter D1 made larger than its axial directional length L1.