Nidec Corporation

Nidec Sankyo Corporation

Sankyo Seiki Mfg. Co., Ltd

Western Digital Technologies, Inc.

Kabushiki Kaisha Sankyo Seiki Seisakusho

Toyo Drilube Co., Ltd.

Nippon Densan Co., Ltd.

Masayoshi Saichi

Masato Gomyo

Shingo Suginobu

Yasuyuki Kitahara

Tamotsu Kuribayashi

Toshimichi Kazama

Takehito Tamaoka

Junya Mizukami

Kazushi Miura

Mineo Kurita

Kazuhiko Fukushima

Takehiko Yazawa

Yutaka Ishizuka

Jonathan M Garbarino

Katsuya Takahashi

Hiroaki Hirano

Hironori Ando

Michihiro Ito

Masaaki Sato

Noboru Ashibe

Takayuki Narita

Mitsuru Ide

Tetsuya Maruyama

Koichi Shoda

Toru Kumagai

Robert N Lion

Hirofumi Kojima

Nobutaka Nagao

Akihito Kobayashi

Makoto Kutsukake

Junichi Takatera

Yoshitaka Murayama

Yoshinari Yoko

A horizontal articulated robot may include a hand; an arm having at least two arm portions including a supporting-arm portion to which said hand is rotatably joined and a supported-arm portion to which the base end of said hand-side arm portion is rotatably joined; a main body portion; and a rotation mechanism structured to rotate said supported-arm portion. The rotation mechanism may include a motor which is arranged such that an axial direction of an output shaft of the motor coincides with a horizontal direction; a Harmonic Drive (registered trade mark) wave-motion gearing device structured to reduce the power of said motor; a first bevel gear coupled to said output shaft; and a second bevel gear coupled with a wave generator of said Harmonic Drive (registered trade mark) wave-motion gearing device and which meshes with said first bevel gear.

Horizontal articulated robot with bevel gears

An industrial robot may include a robot main body; and an elevating mechanism to raise and lower the robot main body. The robot main body may include a hand, an arm to which the hand is joined, a main body portion to which the arm is joined, and an arm-elevating mechanism. The elevating mechanism may include a drive unit, guide rails, a guide block, and a joining member joining the robot main body and the guide block. The housing may include a flat cover between the guide block and the main body unit. Slit through-holes may be formed in the cover to enable the joining member to move in the up-down direction.

Industrial robot with slit through-hole in cover

A horizontal articulated robot in which an arm moves in the horizontal direction for use with objects to be transferred may include a hand on which the objects are to be mounted. The arm may have at least two arm portions including a hand-side arm portion to which the hand is rotatably joined to the front end thereof; and a second hand-side arm portion to which the base end of the hand-side arm portion is rotatably joined to the front end thereof; and a main body portion to which the base end of the arm is rotatably joined. A level which may be attached to the hand, the arm or the main body portion after an inclination of a center axis of rotation of the hand-side arm portion with respect to the second hand-side arm portion is adjusted relative to the vertical direction.

Horizontal articulated robot and method for manufacturing horizontal articulated robot

An industrial robot includes a robot main body and an elevating mechanism to raise and lower the robot main body. The robot main body may include a hand, an arm to which the hand is joined, a main body portion to which the arm is joined, and an arm-elevating mechanism. The center of rotation on the base end side of the arm may be located farther toward the third direction side than the center of the main body unit when viewed in the up-down direction. In the standby state, part of the arm may be positioned farther toward the fourth direction side than the main body unit. The main body unit may be secured to the elevating mechanism. The elevating mechanism may be arranged on one or both sides of the main body unit in the first direction and/or on the fourth direction side.

Industrial robot with elevating mechanism and arm-elevating mechanism

A spindle motor includes a base portion, a rotor hub, a stator, and a circuit board. The base portion preferably includes a through hole and is arranged to spread out radially around a central axis. The rotor hub is arranged above the base portion to rotate about the central axis. The stator is arranged above the base portion, and includes coils each including at least one lead wire. The circuit board is arranged radially outward of the through hole, and arranged on a lower surface of the base portion. The base portion includes a communicating groove arranged to join the through hole and the circuit board to each other. The at least one lead wire of the coils is arranged to pass inside the through hole and the communicating groove to be electrically connected to the circuit board. The through hole is sealed with a sealant.

Spindle motor having connecting mechanism connecting lead wire and circuit board, and storage disk drive having the same

A fluid dynamic pressure bearing includes a shaft arranged along a central axis, an annular member fixed to the shaft, a sleeve, a lubricant, and a lubricating film. A stepped surface is provided on the outer circumferential surface of the shaft. The annular member preferably includes a lower surface extending radially with respect to the central axis and arranged to make contact with the stepped surface in the inner edge portion of the lower surface. The sleeve preferably includes an upper surface axially opposed to the lower surface of the annular member. The lubricant is provided between the shaft and the sleeve and between the annular member and the sleeve. The lubricating film is provided on the lower surface of the annular member at least over a region lying radially outwardly of the inner edge portion of the lower surface.

Dynamic fluid pressure bearing, spindle motor, disk drive apparatus and method for manufacturing the dynamic fluid pressure bearing

A hydrodynamic bearing device comprises a shaft bush having a substantially conical inclined dynamic pressure surface around the outer circumference thereof which is relatively rotatably inserted in a bearing sleeve having a substantially conical inclined dynamic pressure surface around the inner circumference thereof. A substantially conical inclined bearing space is created in the gap between the inclined dynamic pressure surfaces of the bearing sleeve and shaft bush. Lubricant fluid is filled inside the inclined bearing space. A proper dynamic pressure generating means is formed on at least one of the inclined dynamic pressure surfaces of the shaft bush and bearing sleeve. The lubricant fluid is pressurized by the dynamic pressure generating means to generate dynamic pressure, by which the shaft bush and the bearing sleeve are relatively elevated in the radial and thrust directions so that their rotations are supported in a non-contact manner. A fluid sealing portion is provided in the inclined bearing space to prevent the lubricant fluid from leaking outside of the inclined bearing space. A fluid pressurizing means is provided between the inclined bearing space and the fluid sealing portion to pressurize the lubricant fluid in the direction to push it toward the inside of the inclined bearing space.

Hydrodynamic bearing device and a recording disk drive equipped with it

In a spindle motor, a core includes a plurality of core plates, which are laminated one on another. The core is constituted by laminating two cores, that is, a first core and a second core, which are different from each other in shape of a surface facing to a rotor magnet. At least a part of a cogging torque generated at the second core can be cancelled by a cogging torque generated at the first core.

Motor and recording disk drive device provided with the same

An ionic liquid is utilized as the dynamic-pressure fluid charged inside a bearing space formed in the gap where an axial bushing (axial component) [] and a bearing sleeve (bearing component) [] oppose. Designing a dynamic-pressure bearing device is made possible virtually without having to consider such factors as how to control dynamic-pressure-fluid evaporation or how to secure electrical continuity between the axial bushing and the bearing sleeve. Owing to ionic liquids' property of not hydrolyzing, deterioration of the dynamic-pressure fluid from moisture absorption, oxidation, etc. is inhibited, yielding a dynamic-pressure bearing device with a long lifespan.

Dynamic-pressure bearing device and disk drive

A brushless motor as an example of the invention has a stationary assemblyhaving a first housing membermade of a ferromagnetic material and a statorheld in the first housing member, and a rotorhaving a rotor magnetfacing the stator. A annular shield plateheld by the rotoris disposed between the rotor magnetand the first housing memberand, further, an outer circumferential faceof the shield plateis disposed between a magnetically neutral areain the radial direction in the lower end of the rotor magnetand the outer circumferential face of the rotor magnet

Brushless motor and recording disk driving apparatus having the brushless motor

In a spindle motor, a core () includes a plurality of core plates (), which are laminated one on another. The core () is constituted by laminating two cores, that is, a first core () and a second core (), which are different from each other in shape of a surface facing to a rotor magnet (). At least a part of a cogging torque generated at the second core () can be cancelled by a cogging torque generated at the first core ().

A conical hydrodynamic bearing device comprises a shaft bush having a conical inclined dynamic pressure surface around an outer circumference thereof being relatively-rotatably inserted in a bearing sleeve having a conical inclined dynamic pressure surface around an inner circumference thereof, so that a conical inclined bearing space is created in a gap between the inclined dynamic pressure surfaces of the bearing sleeve and shaft bush. A lubricant fluid is filled inside the inclined bearing space. A proper dynamic pressure generating means is formed on at least one of the inclined dynamic pressure surfaces of the shaft bush and bearing sleeve. The lubricant fluid is pressurized by the dynamic pressure generating means to generate dynamic pressure, by which the shaft bush and the bearing sleeve are relatively elevated in the radial and thrust directions so that their rotations are supported in a non-contact manner. An open angle &#x3b8;created by a pair of generatrixes between which a plane including the center axis of the shaft bush intersects with the inclined dynamic pressure surface of the shaft bush which is set to be larger than an open angle &#x3b8;created by a pair of generatrixes between which a plane including said center axis of the bearing sleeve intersects with the inclined dynamic pressure surface of the bearing sleeve (&#x3b8;).

Conical hydrodynamic bearing device and a recording disk drive equipped with it, and a method of manufacturing a conical hydrodynamic bearing device

A dynamic pressure bearing device includes a dynamic pressure face of a shaft member, a dynamic pressure face of a bearing member, lubricating fluid filled in a bearing space of a dynamic pressure bearing portion including a gap between the dynamic pressure faces, a dynamic pressure generation means for pressing so that the lubricating fluid generates a dynamic pressure that supports the shaft member in a non-contact manner with the bearing member and in a rotatable manner relatively to the bearing member, and a sliding surface layer having abrasion resistance provided to at least one of the dynamic pressure face of the shaft member and the dynamic pressure face of the bearing member. The sliding surface layer is made up of a resin lubricating film in which many particles of solid lubricating material is dispersed, and a maximum diameter of the particles constituting the solid lubricating material included in the sliding surface layer is smaller than a minimum gap size of the bearing space of the dynamic pressure bearing portion.

Dynamic pressure bearing device

A thrust dynamic pressure bearing apparatus includes a shaft member and a thrust plate having a fixing hole that is provided with chamfered sections Ca and Cb at the fixing hole. The shaft member is shrink fitted or pressure inserted in the fixing hole of the thrust plate. The chamfered sections Ca and Cb have axial lengths La and Lb in the axial direction. Dimensional relations of the axial lengths La and Lb in the chamfered sections Ca and Cb are set to be within a specified range to evenly distribute the bonding force of the thrust plate applied to the shaft member along the axial direction.

Growing community of inventors

Nagano, Japan

Masayoshi Saichi