Abstract: A clutch plate arranged to face a contact object so as to be relatively rotatable and relatively movable includes a contact surface being able to contact the contact object via lubricant and a minute groove open at the contact surface and formed of a plurality of groove portions having a predetermined groove pitch. A ratio of a contact area of the contact surface to an area obtained by adding an opening area of the minute groove to the contact area of the contact surface is 90% to 96% in an initial state.

Abstract: A power transmission chain including a plurality of links each having front and rear insertion through holes through which pins are inserted, and a plurality of first pins and a plurality of second pins which are arranged in a line for connecting together the links which are arranged in a chain width direction. The links are made up of links of small pitch length and links of large pitch length. The links of large pitch length corresponding to the first pin or the second pin that is clamped by the pulley are arranged such that the links of large pitch length are always included in one to one-half in total when a winding contact diameter of the pulley is a minimum operation radius.

Abstract: A manufacturing method of a roller bearing cage, including a cage main body formed with an annular plate, and a plurality of cage pockets opened along a circumferential direction on the cage main body for retaining rollers having flat end faces, includes punching an annular plate from a metal, forming a plurality of cage pockets on the annular plate, and pressing an edge of one of the cage pockets in a thickness direction of the annular plate on a side face of the one of the cage pockets with a press jig having a pressing face of a predetermined shape to form a chamfered portion.

Abstract: A control device of a motor unit includes a housing, and a circuit board that is housed in the housing. The circuit board includes a first substrate portion which is fixed to a side wall and in which heat dissipation components are fitted onto a first main surface, a second substrate portion in which a second main surface faces the first main surface of the first substrate portion, and heating elements are fitted onto the second main surface, and a first connecting portion that connects an end portion of the first substrate portion with an end portion of the second substrate portion. The heating elements and the heat dissipation components face each other.

Abstract: A steering system includes a column shaft that is supported by a column tube so that the column shaft is able to rotate. A male serration is formed in a lower end of a lower shaft of the column shaft in an axial direction. A universal joint connects the lower shaft with an intermediate shaft. A first portion of the male serration is fitted to a serration hole of a rotor of a steering angle sensor, and a second portion of the male serration is fitted to a serration hole of a first yoke of the universal joint.

Abstract: A rack shaft supporting device includes a support yoke, a plug that closes the other opening of an accommodation chamber, a ball screw mechanism between the support yoke and the plug, and a torsion urging member between the ball screw mechanism and the plug. The ball screw mechanism includes: a first threaded portion in which a first thread groove is formed; a second threaded portion in which a second thread groove is formed; and balls arranged in a rolling path formed of the first thread groove and the second thread groove. The torsion urging member rotates the second threaded portion relative to the plug and moves the second threaded portion toward the support yoke.

Abstract: The surface roughness Ra of tooth surfaces of teeth of a worm wheel is greater than or equal to 0.1 ?m and less than or equal to 0.5 ?m and, more particularly, less than or equal to 0.3 ?m. The worm wheel is produced by forming a resin member on which the teeth are to be formed, using a resin composition that contains reinforcing fiber; forming the teeth by performing a gear-cutting process; and adjusting the surface roughness of the tooth surfaces by performing a running-in machining process on the teeth.

Abstract: A non-aqueous electrolyte secondary battery includes a mixture layer of a negative electrode. The mixture layer contains carboxymethyl cellulose. A product of a median diameter (?m) of a negative electrode active material contained in the negative electrode and a ratio of a weight (wt %) of the carboxymethyl cellulose adsorbed on the negative electrode active material to a weight of the negative electrode active material is not less than 2.2 and not larger than 4.2.

Abstract: A method for producing a non-aqueous electrolyte secondary battery includes: subjecting a mixture of a negative-electrode active material on which oil has been adsorbed, CMC and water to hard kneading to prepare a primary kneaded mixture; diluting the primary kneaded mixture with water to prepare a slurry; and adding a binder to the slurry. The method further includes defining an amount of the oil to a value equal to or more than 50 ml/100 g and equal to or less than 62 ml/100 g, wherein the amount of the oil is an amount at the time when the viscosity characteristics of the negative-electrode active material exhibits 70% of the maximum torque that is generated when the oil is titrated onto the negative-electrode active material. The 1% aqueous solution viscosity of the CMC is defined to a value equal to or more than 6000 mPa·s and equal to or less than 8000 mPa·s.

Abstract: A guide piece projects from an outside surface of a cage bar of a cage so as to make sliding contact with a raceway surface of an outer ring. As the cage rotates, the guide piece operates to guide the rotation of the cage while removing an excess grease on the raceway surface and transferring the excess grease to axially opposite ends of the outer ring.

Abstract: A ball joint and production method thereof that ensure that grease retainers are provided on the entire contact surface of a resin sheet between an outer surface of a round head of a ball stud and the contact surface to properly maintain lubrication between the round head and the resin sheet. Graphite particles are dispersed over an inner surface of the resin sheet, and the resin sheet and the round head of the ball stud are inserted in a housing. An open end portion of a housing body is swaged to be reduced in diameter. The graphite particles are pressed against the inner surface of the resin sheet, whereby portions of the inner surface of the resin sheet against which the graphite particles abut are depressed. Thus, gaps are formed around the respective graphite particles. Grease enters the gaps, which each function as a grease retainer.

Abstract: A torque detection device includes: a torsion bar that couples a first shaft to a second shaft such that the first shaft and the second shaft are rotatable relative to each other; an annular magnet that is fixed to the first shaft; a pair of magnetic yokes that are fixed to the second shaft and that are arranged to face the magnet; and Hall ICs. Each of the magnetic yokes has a plurality of lugs arranged at equal intervals in a circumferential direction, and each lug becomes narrower toward its distal end, and has a curved profile with rounded corners when viewed from a radial direction of the corresponding magnetic yoke.

Abstract: A rolling bearing apparatus capable of restraining the residence of air bubbles in the water-cooling jacket while curbing the running cost and the production cost is provided. A rolling bearing apparatus is configured to include a rolling bearing, and a housing which houses the rolling and in which a water-cooling jacket into which cooling water is introduced. By forming the bottom portion of the water-cooling jacket by an inclined surface in the axial direction, it is possible to preferably rectify the cooling water in the water-cooling jacket and therefore effectively restrain the residence of air bubbles without increasing the amount of water supplied to the water-cooling jacket.

Abstract: The invention provides a power transmission chain in which abnormal noise can be reduced. In a link, a front through hole 7 and a rear through hole 8 aligned in a chain traveling direction X are provided. A pillar portion 9 is provided between the front through hole 7 and the rear through hole 8. Projecting portions 26, 29 are provided at a central portion in a height direction V of the pillar portion 9, and concave curve portions 27, 28, 30, 31 are provided at both end portions. A pair of flat portions (33,34 and 38,39) are provided on each projection portion 26,29 for restricting an overshoot of the chain. A not-shown pin that is loosely fitted to each of the front through hole 7 and the rear through hole 8 is brought into abutment with corresponding flat portions 27,28,30,31 to restrict an overshoot of the chain 1.

Abstract: An on-demand-type drive state control apparatus for a vehicle is provided. In the case where acceleration slippage occurs at drive wheels (rear wheels) of a vehicle when a drive system is in a two-wheel drive state, the drive system is switched from the two-wheel drive state to a four-wheel drive state. That is, the maximum transmittable torque of a multi-disc clutch mechanism increases from “0” to a predetermined value. In the four-wheel drive state, the maximum transmittable torque decreases stepwise from the present value by a predetermined value every time the vehicle travels over a predetermined distance in a state in which none of the wheels cause acceleration slippages. That is, the clutch drive current supplied to the multi-disc clutch mechanism decreases gradually (stepwise or in a plurality of steps), and the drive torque distributed to the front wheels (rear wheels) decreases (increases) gradually.

Abstract: A roller bearing capable of effectively improving the service life of the roller bearing is provided by performing surface treatment with coating. A cylindrical roller bearing includes: an outer ring having an outer ring raceway surface; an inner ring having an inner ring raceway surface that faces the outer ring raceway surface; and a plurality of cylindrical rollers rollably disposed between the outer ring raceway surface and the inner ring raceway surface. The inner ring raceway surface of the inner ring is provided with a black oxidation coating, and a rolling contact surface of each cylindrical roller is provided with a diamond-like carbon coating.

Abstract: A roller bearing capable of effectively restraining occurrence of smearing or the like is provided. A cylindrical roller bearing includes: an outer ring having an outer ring raceway surface; an inner ring having an inner ring raceway surface that faces the outer ring raceway surface; and a plurality of cylindrical rollers rollably disposed between the outer ring raceway surface and the inner ring raceway surface. The inner ring raceway surface of the inner ring is provided with a manganese phosphate coating, and a rolling contact surface of each cylindrical roller is provided with a diamond-like carbon coating.

Abstract: A method of manufacturing a magnet from material powders made of a R—Fe—N compound that contains a rare earth element as R or material powders made of a Fe—N compound, includes: an oxide film bonding step in which a compact is formed by bonding the material powders to each other by oxide films formed on surfaces of the material powders; and a coating step in which a surface of the compact is covered with a coating film.

Abstract: A rotor includes a cylindrical magnet having a plurality of magnetic pole pairs. There are two types of the magnitude of magnetic force in the magnetic pole pairs, that is, a relatively large first magnetic force and a second magnetic force that is smaller than the first magnetic force. Three magnetic sensors are arranged around the rotor. A rotation angle computing device detects the peak values of output signals of the respective magnetic sensors. Then, the rotation angle computing device identifies the magnetic pole pair, sensed by the first magnetic sensor, based on a combination of the local maximum values of the three output signals.

Abstract: A motor driving force transmission device including a speed reduction and transmission mechanism which transmits a motor driving force to a rear differential, a first electric motor that is connected to the rear differential via the speed reduction and transmission mechanism and which produces a first motor driving force, a second electric motor that is connected to the first electric motor and the speed reduction and transmission mechanism and which produces a second motor driving force, and an ECU. The ECU outputs a control signal to drive both the first electric motor and the second electric motor when a driving torque required for the rear differential is equal to or larger than a predetermined torque, and outputs a control signal to drive alternately the first electric motor and the second electric motor when the driving torque required for the rear differential is smaller than the predetermined torque.