Abstract: An inventive torque detection device includes: a magnetic circuit forming member provided at a rotating body to which a torque is applied; a magnetic flux collecting ring for collecting a generated magnetic flux; a detection part for detecting, based on the density of the collected magnetic flux, the torque applied to the rotating body; a holding ring, having a flange, for holding the magnetic flux collecting ring and the detection part; and a sealing ring for sealing between the flange and a housing.

Abstract: A step portion is formed at an outer peripheral surface of an axially-central portion of an outer ring, and is smaller in diameter than outer peripheral surfaces of axial opposite end portions of the outer ring. The step portion is continuously formed over an entire periphery of the outer ring, and has a predetermined width over the entire periphery. The outer peripheral surface and inner peripheral surface of the outer ring are pressed radially inwardly, and therefore are bulged radially inwardly into a step-like shape to form the step portion having an axis coinciding with a axis of the outer ring. A pedestal of a cylinder block and a cap member retain the outer peripheral surface of the step portion, thereby positioning the outer ring in the axial direction and also preventing a movement of the outer ring in the axial direction.

Abstract: A grinding wheel having a convex grinding surface is attached to a wheel spindle that is contactlessly supported by a casing through a controlled type axial magnetic bearing and controlled type radial magnetic bearings and that is rotated by an electric motor. A groove of a workpiece is ground by causing relative displacement of the casing. After the axial positioning of the casing is performed, the casing is radially displaced. Then, the groove is ground. The stiffness value of the axial magnetic bearing 6 is set to be lower than a normal value before the casing is radially displaced. After it is detected that the grinding surface of the grinding wheel touches the entire groove of the workpiece and that the grinding of the entire surface of the workpiece is started, the stiffness value is set back to the normal value.

Abstract: A drawn cup roller bearing includes: a drawn cup outer ring that includes a cylindrical portion serving as an outer raceway surface, a first rib which is formed at one axial end portion of the cylindrical portion and is bent radially inwardly such that a step portion is formed at an intermediate portion of the first rib, and a second rib which is formed at the other axial end portion of the cylindrical portion and is radially inwardly folded back; an annular seal which is press-fitted in the step portion; and a cage which holds a plurality of rollers and is inserted into the drawn cup outer ring from the second rib to be mounted in the drawn cup outer ring in such a manner that the cage is retained against withdrawal by the step portion and the plurality of rollers is retained against withdrawal by the second rib.

Abstract: In a spindle apparatus for a machine tool, a spindle is supported on a housing by support-purpose bearing devices, and is rotated by an electric motor, and a tool is attached to a tool attaching portion formed at a distal end of the spindle. A radial magnetic bearing for vibration suppressing purposes which includes a plurality of electromagnets is provided around the tool attaching portion of the spindle. A plurality of radial displacement sensors for detecting a displacement of the tool attaching portion in radial directions are provided around the tool attaching portion. There is provided an electromagnet control unit for controlling the electromagnets of the radial magnetic bearing on the basis of outputs of the radial displacement sensors so as to support the tool attaching portion in a predetermined position.

Abstract: There is provided a pretension loading method for a power transmission chain, in which a chain with an endless loop shape having a plurality of laminated link plates bendably connected to each other by pin members is wound around a plurality of rollers and the chain is endlessly rotated while a load is loaded on the chain so as to load pretension on the chain, the method including the steps of: (a) maintaining the chain in a substantial tension state without a slack by controlling tension of at least one of the plurality of rollers while endlessly rotating the chain; (b) measuring a length of the chain in the tension state; (c) stretching the chain to a target length by controlling a displacement of the at least one of the rollers; (d) maintaining the chain in a substantial tension state without a slack by controlling tension of the at least one of the rollers; and (e) measuring the length of the chain in the tension state.

Abstract: An amorphous-carbon coated member includes a conductive substrate, and an amorphous carbon film. The amorphous carbon film is fixed onto a part of a surface of the substrate at least, and includes a compositionally gradient film. The compositionally gradient film has an outer side and a substrate side, and is composed of carbon, silicon and hydrogen. The silicon concentration inclines continuously from the lowest to the highest in the direction away from the outer side to the substrate side. The hydrogen concentration inclines continuously from the highest to the lowest in the direction away from the outer side to the substrate side. The amorphous-carbon coated member exhibits not only good wear resistance but also low aggressiveness against mating member simultaneously.

Abstract: A center take-off rack-and-pinion steering apparatus includes a cylindrical rack housing having an elongate hole extending in a longitudinal direction, a mounting bracket for mounting ends of a pair of tie rods on a rack shaft, and a slider interposed between the mounting bracket and the rack shaft and slidable in an inner periphery of the elongate hole. The inner periphery of the elongate hole and the slider include sliding contact sections that are brought into sliding contact with each other along with the slide of the slider slides. The sliding contact sections include at least a pair of curved sliding contact surfaces that are brought into sliding contact with each other in a curved shape when seen in an axial direction of the rack shaft.

Abstract: A permanent magnet included in a rotor of a brush-less motor is a radial anisotropic magnet in which multi-poles are magnetized in the circumferential direction and is skew magnetized along the axial direction in such a manner that a surface to one end part of an upper side from a central part in the axial direction and a surface to an end part of a lower side from the central part are axially shifted by a predetermined angle in the circumferential direction from each other. In accordance with this skew-magnetization, coggings including irregularly varying components generated in the rotor owing to the three-dimensional shapes of coil ends provided at opposite ends of a tooth 611a for fixing a winding have opposite phases to each other, so that the coggings are cancelled with each other. Accordingly, the coggings can be reduced or cancelled.

Abstract: It is an object of the present invention to provide a differential case for a vehicle and a differential device for a vehicle restricting change and movement of an intermeshing of a pair of side gears and a pair of pinion gears to achieve stable differential restriction force. The differential case or the differential device for the vehicle comprises a case body 50 accommodating a pair of side gears 5R, 5L and a pinion gear 3 or 4 engaging in mesh with the side gears 5R, 5L, and a pinion gear supporter 53 accommodated in said case body 50 and having a pinion gear supporting portion 56 or 57 to install said pinion gear 3 or 4 in recess space 60, 61 of said pinion gear supporter 53 and to support slidably an outer peripheral surface of said pinion gear 3 or 4 for rotation of said pinion gear 3 or 4.

Abstract: A rolling bearing assembling method includes: providing a subassembly member in which a cage and an outer ring raceway of an outer ring are combined with each other; disposing a rotary member that includes groove portions formed on an outer circumference thereof, concentrically with the outer ring so that the plurality of groove portions confront respectively pockets of the cage; disposing a guide member including a guide hole, above the rotary member; supplying tapered rollers from the guide hole between the pockets and the groove portions, respectively; rotating the rotary member by a predetermined angle so that the tapered rollers are pushed radially outward by raised portions between the adjacent groove portions thereby accommodating the tapered rollers into the pockets, respectively; providing the seal ring on the inner ring raceway; and assembling the hub main body together with the outer ring.

Abstract: A magnetized pulsar ring of the invention is a pulsar ring fixed to an outer peripheral surface of a supporting member and including a ring body in which a number of magnetic poles are at predetermined intervals in a peripheral direction. The ring body 11a is formed of a plastic magnet, and has a cushion member made of an elastic body that is interposed between the ring body and the outer peripheral surface.

Abstract: A resin wound component is configured such that a ring-shaped resin portion is integrally formed with the outer circumference of a ring-shaped metal member. At this time, stoppers formed of thermoplastic resin are disposed in the outer circumferential surface of the metal member so as to prevent a relative rotation between the metal member and the resin portion.

Abstract: The invention provides an electric motor including a tubular insulator that insulates coils of each of U, V, and W phases that makes a rotor rotated by an electromagnetic force, and a stator core around which the coils are wound; and a plurality of busbars that are fixed to the insulator to relay feed of power to the coils that constitute each phase. Ring-shaped terminals directly connected to an external driving circuit board for controlling a driving current leading to each phase of the coils, without via separate connecting members, are integrally formed in the busbars, respectively.

Abstract: A moving-magnet type linear motor is provided with cooling blocks which are attached to each of stator bases alongside a coreless coil and which allow coolant to flow therethrough for cooling the coreless coil. Each of the cooling blocks has in a base end portion thereof a fluid passage for flowing coolant and at an extreme end portion thereof a plurality of sheet-like protrusions like fins which are arranged alongside a part of the circumferential surface of the coreless coil with a clearance between each protrusion and the next thereto. Each cooling block is thermally closely jointed with the coreless coil at the extreme ends of the sheet-like protrusions.

Abstract: An ECU determines whether the orientation of the vehicle is deflecting at the time of braking. In addition, in a case where it is determined that the orientation of the vehicle is deflecting, the ECU controls operation of an EPS actuator in order to reduce the assist force provided to the steering system.

Abstract: A combined processing machine 1 includes a workpiece supporter 100, a tool spindle unit 200, at least one tool 501a and a linkage 300 with multi-degrees of freedom. A workpiece W is set on the workpiece supporter 100. The tool 501a is attached to the tool spindle unit 200. The tool spindle unit 200 is mounted on the linkage 300. The linkage 300 is position and attitude-controlled in order to process the workpiece W.

Abstract: A body part of a rotation detecting sensor of a rotation number detector which is provided on a bearing apparatus for an axle has a large diameter part formed in its upper part and a small diameter part formed in its lower part, and at the same time, a sensor fitting hole part which is formed in an outer ring of a bearing part and into which the body part of the rotation detecting sensor is inserted is so formed that an radially outer part thereof has an inner diameter substantially equal to an outer diameter of the large diameter part of the body part, and a lower part thereof has an inner diameter slightly larger than an outer diameter of the small diameter part of the body part.

Abstract: In a three-phase brushless motor, a rotor has a stacked structure including first to third stages which include segment magnets to which a skew process is applied. When the number of poles P in the circumferential direction is set to P, an angle of skew is set to ?=360/(6P/2) [deg]. That is, the magnet segments are respectively arranged so that the magnet segment of the second stage is shifted by a rotating angle of ?/3 in the circumferential direction from the magnet segment of the first stage and the magnet segment of the third stage is shifted by a rotating angle of 2?/3 in the circumferential direction.

Abstract: A resin wound component is configured such that a ring-shaped resin portion is integrally formed with an outer circumference of a ring-shaped metal member by a film gate. The resin portion includes a ring-shaped surrounding portion for surrounding axial end surfaces of outer circumferential edges of the ring-shaped metal member. At this time, the thickness of a ring-shaped surrounding portion on the gate side is configured to be larger than that of a ring-shaped surrounding portion on an opposite side to the gate.