Abstract: A wheel speed detector for detecting a relative rotating speed between an outer ring and an inner ring by means of a magnetic sensor in association with a magnetic ring. A stationary seal member is fixed to the stationary ring and a rotatable seal member is fixed to the rotatable ring. The seal members engage to seal a gap between the inner ring and the outer ring. The magnetic sensor is fixed to a radial inner surface of the stationary seal member and the magnetic ring is fixed to a radial outer or a radial inner surface of the rotatable seal member and surfaces of the magnetic ring other than that fixed to the radial inner surface of the rotatable seal member are covered with a seal lip.

Abstract: In through-feed grinding workpieces by grinding stones rotating around the axes of spindles, the spindles are tiltably held by elastic holding means around tilt axes substantially orthogonal to the direction of exit and entrance of the workpieces with respect to the grinding stones. When a grinding loads are imposed on the entrance sides of the grinding stones, the spindles are tilted by offset loads around the tilt axes against the force of urging means in such a manner that the axial displacement and the exit displacement of the grinding stone due to the offset load are substantially the same. The grinding stones are reset around the tilt axes by the elastic holding means immediately before the end of processing at which time the axial displacement is smaller. This makes it possible to reduce the number of defectively ground articles coming from the through-feed grinding and reduce the wear in the grinding stones.

Abstract: An erroneous assembling preventing tool for a universal joint prevents a shaft from being fixed to a cylindrical section of a yoke main body of the universal joint by fastening a bolt in a state where the shaft is not inserted into a normal position of an axial direction of the cylindrical section. The erroneous assembling preventing tool comprises a fixing section fixed to the yoke main body, a prevention section arranged between first and second tabs of the yoke main body, and a driving section for driving a prevention section. The prevention section is displaceable to a prevention position at which an end of the bolt can be prevented from being inserted through a screw hole of the second tab of the yoke and a prevention release position. The driving section displaces the prevention section to the prevention release position when it is pressed by an end of the shaft inserted into the normal position of the axial direction of the cylindrical section.

Abstract: An electric power assist module for a steering system has an integrated housing for accommodating the torque sensor, motor and electronic control unit. A helical gear train including a pinion gear, an intermediate gear and steering gear are provided to transfer the motion from the motor to an output shaft that is coupled to an input shaft by way of a torsion bar.

Abstract: With the object of effective utilization of a fine powder generated during comminution of a crude material for iron manufacture, a briquette is provided which comprises a porous brittle molded body with a bulk specific gravity of 1.5 or more which is obtained by compression molding a molding composition comprising a fine powder generated during comminution of a crude material for iron manufacture and a reinforcing portion for reinforcing the brittle molded body. Further, with the object of effective reuse of used alumina grinding stones, a briquette is provided which comprises a porous brittle molded body obtained by compression molding a molding composition comprising a comminuted powder of a used alumina grinding stone and a cotton-like aggregate comprising a grinding powder of a ferrous metal and a grinding liquid, and a reinforcing portion for reinforcing the brittle molded body.

Abstract: There are provided tapered roller bearings which support a pinion shaft. Inner races have large rib faces each having a recessed surface shape on which large-diameter end faces of tapered rollers slide. The surface roughness of the large-diameter end face is ?1 [?mRa] is 0.025 or more. In addition, assuming the surface roughness of the large rib face is ?2 [?mRa], (?12+?22)1/2 is 0.17 [?mRa] or less. The sliding portion of the large-diameter end face and the sliding portion of the large rib face are made of a carburized steel, and the carbon content in a matrix phase in a surface layer portion of each of the sliding portions to a depth of 50 ?m from a surface is 0.8 wt % or more, the surface hardness thereof is in the range of Rockwell C63 to 67, and a surface retained austenite amount is set to be 20% or more and 25% or less.

Abstract: A rolling bearing includes: outer and inner rings, at lease one of which is made of a ceramics; a plurality of rolling elements interposed between the outer and inner rings; a seal groove, a sectional shape in an axial direction of which is formed by substantially a partial circular arc, and which is formed on a shoulder portion of a raceway of one of the outer and inner rings; and a resin seal member including a peripheral edge portion fitted to the seal groove.

Abstract: In effecting two-sided surface grinding for surface-grinding the opposite surfaces of a workpiece simultaneously by a pair of oppositely disposed grinding wheels, infeed grinding is performed by oscillating the workpiece within the range where the surfaces to be ground of the workpiece do not protrude from the inner and outer peripheries of the grinding wheel surfaces of the grinding wheels, and then through-grinding is performed by feeding the workpiece to allow the surfaces to be ground to pass along the inner and outer peripheries of the grinding wheel surfaces. As an effect, worn wheel edges or the like can be prevented from being formed in the inner and outer peripheral edges, that grinding wheel surfaces can be maintained in proper shape for a prolonged time, that the grinding accuracy is better, and that dress interval can be prolonged, thus improving the life of grinding wheels.

Abstract: A method of gas carburizing is carried out at a carburizing temperature which is not higher than a peritectic point temperature at which ? iron and liquid phase are transformed into ? iron and not less than a eutectic point temperature at which liquid phase is transformed into ? iron and cementite. The method comprises the step of predetermining the limiting carburizing conditions at which the surface layer of a sample of a steel treatment object present in a carburizing atmosphere is austenitized without melting and the step of gas carburizing the treatment object under carburizing conditions which are set so as not to contradict the limiting carburizing conditions, at a carburizing temperature which is not higher than the peritectic point temperature and not less than the eutectic point temperature. The limiting carburizing conditions comprise an upper limit value of a partial pressure of carburizing gas at which the surface layer of the sample is austenitized without melting.

Abstract: A case hardening bearing steel having an excellent rolling contact fatigue life in intermediate temperature, in addition, excellent toughness at room temperature is provided. Specific means for solving the problems are as follows. The composition contains, by mass percent, C of 0.15 to 0.30 mass percent, Si of 0.5 to 2.0 mass percent, Mn of 0.3 to 2.0 mass percent, Cr of 1.3 to 2.5 mass percent, Mo of 0.3 to 1.0 mass percent, and O of not more than 0.0012 mass percent in a range where (Si+Mo)?1.0 mass percent is satisfied, and contains iron and inevitable impurities as remnant; the maximum size of oxide nonmetallic inclusion is not more than 12.5 ?m when examined area is 320 mm2; number of the oxide nonmetallic inclusion having a diameter of equivalent circle of 3 ?m or more is not more than 250 when the examined area is 320 mm2; in addition, C density of an outer layer is adjusted to be in a range from 0.7 to 1.2 mass percent by carburization.

Abstract: This method includes: a supporting process of supporting a worm wheel in a first supporting section of a supporting body; an engaging process of engaging a jig gear which corresponds to a worm with the worm wheel; a measuring process of measuring a distance between the centers of the worm wheel and the jig gear; a gear processing process of processing the worm based on the measured distance between the centers; and a supporting process of supporting the worm in a second supporting section of the supporting body after releasing the engagement between the worm wheel and the jig gear.

Abstract: A torque detecting apparatus having a permanent magnet fixed to an input shaft, magnetic yokes fixed to an output shaft coaxially connected to the input shaft via a torsion bar and disposed within a magnetic field of the permanent magnet to form a magnetic circuit, and a Hall IC for detecting a magnetic flux induced by the magnetic yokes. The permanent magnet is of a truncated conical shape, and the bevel circumference surface thereof is magnetized by magnetic poles alternately in a reverse polarities along circumference direction, so as to oppose the magnetic yokes. A torque applied to the input shaft or the output shaft can be detected through detection by the Hall IC of the magnetic flux generated between the magnetic yokes. The configuration allows reducing the length in an axial direction of the input shaft.

Abstract: The method consists in: determining in which actually sector the booster motor is located, a sector of the booster motor being defied by two successive poles; determining a relative angle position of the steering wheel in relation to the booster motor; identifying a sector, known as neutral, in which the booster motor is located when the rotation speeds of the rear wheels, i.e. right and left of the vehicle, are equal; determining an angle offset of the steering wheel corresponding to a neutral angle position of the steering wheel; determining an absolute angle position of the steering wheel which is equal to the difference between the relative angle position of the steering wheel and the offset angle thereof.

Abstract: The invention relates to a method for motor vehicles provided with an electrical sero steering controlled by an electronic processor. The method comprises using an electrical signal within the processor which has at least one component image of the parasite vibrations coming from the front subframe. Said signal is filtered such as to isolate the component image of the parasite vibrations, from which a corrective value for the control current, which controls the electric servo motor for the steering, is calculated. The corrective value thus calculated is subtracted from the current control, determined by taking into account other parameters, to give a corrected control current, which gives to rise to an attenuation in the vibrations transmitted to the steering system and the steering wheel by acting on the servo steering.

Abstract: An electric power steering apparatus comprises a steering assisting electric motor having an output shaft and a speed reduction mechanism. The speed reduction mechanism includes conical first and second gears to be engaged with each other. The first and second gears include a plurality of teeth each having a tooth surface. The mutually corresponding tooth surfaces of the first and second gears each include engaging regions to be engaged with each other. A center position in a tooth width direction of the engaging region of each tooth surface of the first gear in an unloaded state is offset by a first offset amount from center position in the tooth width direction of the tooth surface of the first gear to a relatively small end portion of the tooth of the first gear.

Abstract: The method consists in the following when the instantaneous speed of the vehicle is greater than a pre-determined threshold speed: identifying that the vehicle travels in a straight line during a minimum pre-determined period without torque exerted on the steering wheel by the driver of the vehicle; if the prior condition is met, an average residual torque (tm) is determined for the steering wheel, particularly by calculating a sliding scale of measures of torque on the steering wheel; if the average residual torque (tm) on the steering wheel is greater than a pre-determined minimum torque, a correction, which is particularly proportional to the average residual torque (tm), e.g.

Abstract: A power steering apparatus according to the present invention is constructed to calculate a rate of change of steering speed detected by steering speed detecting means and judge whether the calculated rate of change is smaller than or equal to 0 or not, and reduce a gain of feedback control in comparison with a gain at the time of judgment when it is judged that the rate of change remains smaller than or equal to 0 for a predetermined time period and keep the reduced gain of feedback control until the deviation between target rotational speed and actual rotational speed of an electric motor becomes larger than 0.

Abstract: The present invention provides a vacuum heat treating method, such as carburization, carbonitridation, high temperature carburization, high concentration carburization and the like, performed while supplying a mixed gas of ethylene gas and hydrogen gas under reduced pressures. The method includes: detecting a quantity of ethylene gas and that of hydrogen gas in a vacuum heat treating furnace (1); calculating an equivalent carbon concentration of atmosphere on the basis of the detected quantity of ethylene gas and that of hydrogen gas; and comparing the calculated value with a targeted value which is set on the basis of a material specification and required heat treatment performance of an object to be treated (a workpiece), to control quantities of ethylene gas and hydrogen gas supplied into the vacuum heat treating furnace (1) on the basis of a difference between the calculated value and the targeted value. A heat treatment quality required for the workpiece can be obtained with accuracy and reproducibility.

Abstract: A vehicular steering apparatus includes a column bracket secured to a steering column; and a fixing bracket secured to a vehicle body. The column bracket includes a top plate and a pair of side plates. The fixing bracket supports the column bracket via a support shaft. A support-shaft through hole formed in each of the side plates of the column bracket includes a slot extended along a longitudinal direction of the steering column. A resilient member is interposed between the top plate of the column bracket and a confronting portion of the support shaft. The resilient member biases the support shaft along a predetermined biasing direction to restrict play of the support shaft in the slot.

Abstract: A two-sided surface grinding apparatus capable of eliminating undulations of concentric circles produced in the work surfaces by grinding, thereby further improving the degree of flatness of the work surfaces after grinding includes a pair of support pads which hold work outwardly of grinding whetstones and noncontactly support the work by the pressure of fluid are formed with notches corresponding to the grinding whetstones and extending from the outer edge to the center, and their noncontact support surfaces are provided with a plurality of pockets having fluid supply holes, and a mesh section forming banks around the peripheries of these pockets, the mesh section being composed of a peripheral edge disposed along the outer periphery of the noncontact support surface, and inside veins disposed so as to divide the inside of the peripheral edges and connected to the inside-and-outside connecting sections.