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: 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 rolling bearing includes: an inner ring; an outer ring; a plurality of rolling elements; a retainer; and a sealing member. First to third lubricant reservoir portions that store the lubricant are respectively formed on the radially inner side of the retainer, on the inner side of the sealing member, and in an inner peripheral surface of the outer ring at a position near a raceway. An inclined first guide surface that guides the lubricant from the second lubricant reservoir portion toward the raceway is formed in an inner surface of the sealing member. An inclined second guide surface contiguous with the first guide surface and guiding the lubricant toward the raceway is formed in the inner peripheral surface of the outer ring. The first lubricant reservoir portion of the retainer is in communication with pockets of the retainer, which accommodate the rolling elements.

Abstract: A differential apparatus for a vehicle comprises a pair of output gears 3, 4, first and second pinion gear 5, 6 intermeshing with the output pinion gears, and a differential case 2 accommodating the output gears and pinion gears. The second pinion gear 6 has large and small gear portions 6A, 6B whose pitch diameters are different and whose which tooth numbers is same respectively, and a tooth crest 60 and a tooth recess 61 formed to be shared by the large and the small gear portions 6A, 6B continuously from the large gear portion 6B to the small gear portion 6A.

Abstract: An electric power steering system in which a current command for a brushless DC motor is determined based on a detected steering torque, a voltage to be applied is determined based on a difference between the current command value and a current value flowing to the motor, and steering assist is implemented by applying the voltage so determined to the motor. A rotational angular velocity is computed based on a detected rotor position, and it is determined that the motor is abnormal when a rotational angular velocity determination unit determines that the rotational angular velocity is equal to or less than a predetermined value, a current command value determination unit determines that the current command value is equal to or less than a predetermined value, and a voltage determination unit determines that the voltage applied to the motor falls out of a predetermined voltage range.

Abstract: A camshaft apparatus includes rolling bearings which support a camshaft rotatably, whereby a reduction in torque when an engine is started or is running at low speeds, a reduction in vibration of the camshaft and an extension of the lives of the bearings can be realized. In the rolling bearings, one rolling bearing is made to constitute a main ball bearing which restrains an axial relative movement of the camshaft relative to a shaft case, and the other rolling bearings are made to constitute a plurality of needle roller bearings, whereby a mechanical movement of the camshaft in an axial direction can be restricted in an ensured fashion by the main ball bearing. As to relative displacements due to thermal expansion or contraction of the camshaft and/or the shaft case, an axial relative displacement can be absorbed by needle rollers relatively moving on inter-cam outer circumferential surface areas.

Abstract: In a wheel bearing assembly, an outer surface of a head portion of a link bolt contacts an inner surface of an end wall portion of a constant-velocity joint outer ring. A shaft portion of a link bolt is press-fit into a penetration hole of the constant-velocity joint outer ring. An external threaded portion of the link bolt is inserted into the central hole of a hub spindle so that the external threaded portion protrudes from an outer end surface of a hub wheel. A lock nut is fastened to the external threaded portion, so that the wheel hub and the constant-velocity joint outer ring are linked, and the first spline and the second spline are meshed so as to be capable of torque transmission.

Abstract: A motor vehicle steering shaft (3) is provided with: an inner shaft (11) and a tubular outer shaft (10) fitted into each other and to transmit a torque to and from each other; a rigid coupling element (25) for rigidly coupling the inner shaft (11) and the outer shaft (10) in a circumferential direction (C) of the inner shaft (11) when a relative rotation amount of the inner shaft (11) and the outer shaft (10) exceeds a predetermined range; and an elastic coupling element (36) for elastically coupling the inner shaft (11) and the outer shaft (10) in the circumferential direction (C) of the inner shaft (11) when the relative rotation amount of the inner shaft (11) and the outer shaft (10) is within the predetermined range. The elastic coupling element (36) includes a resin member (36). The inner shaft (11) and the outer shaft (10) are elastically supported mutually via the resin member (36) at a central position of the predetermined range when no torque is loaded to the steering shaft (3).

Abstract: A valve device includes: a valve housing defining a cylindrical space connected to a high-pressure source, and having a first communication hole open at a valve seat located at a bottom portion of the valve housing and providing fluid communication between the cylindrical space and a low-pressure source; a seal member arranged in the cylindrical space and providing or shutting off fluid communication between the high-pressure and low-pressure sources so that the seal member moves away from or contacts the valve seat; and a stem having an accommodating recess at one end of the stem and moved axially. The seal member is fitted and held in the accommodating recess. The seal member has a second communication hole that provides fluid communication between a bottom face of the accommodating recess and the low-pressure source when the seal member is in contact with the valve seat.

Abstract: A rolling bearing 10 includes an outer ring fixed to a housing, an inner ring that is arranged so as to face the outer ring in the radial direction of the rolling bearing and that is fixed to a rotating shaft, balls that are rollably arranged at positions between the outer ring and the inner ring in the radial direction, and seal members that seal up an annular space between the outer ring and the inner ring. Escape passages through which fluid is circulated in the axial direction of the rolling bearing so as to be allowed to escape are formed in a contact portion of the outer ring, which contacts the housing.

Abstract: The invention relates to a pusher device (8) that includes a rotary bearing (10) having an inner periphery (11) that is off-centre relative to the outer periphery (12). In order to compensate for wear, the bearing (10) is rotationally urged in one direction (F) by a spring (10) and is thus pressed against the back (9) of a rack (3) that is then pushed back against the teeth of the steering sprocket (5). The rotary bearing (10) is rotatingly mounted in a housing (13) that is in turn mounted on a steering casing (2) so as to be capable of sliding in a direction (B) parallel to a plane (P) of the teeth (6) of the rack (3) and orthogonal to the axis (A) of said rack. Shock-absorbing spring means (20, 21) are arranged between the sliding housing (13) and the steering casing (2) for absorbing the straightness defects of the rack (3).

Abstract: A vehicle steering system including a transmission ratio variable mechanism that has a first shaft connected to a steering member and a second shaft connected to a turning mechanism, coupled coaxially to each other, and a transmission ratio variable mechanism motor disposed coaxially with the first and second shafts for driving the transmission ratio variable mechanism. The transmission ratio variable mechanism motor includes a tubular rotor, and an accommodation space is defined on the inner side in the radial direction of the tubular rotor. At least one of sensors is disposed inside the accommodation space.

Abstract: A wheel bearing apparatus includes a roller bearing, an inner shaft having an outer circumferential surface to which an inner ring of the roller bearing is installed, a coupler ring attached to an end portion of the inner shaft, and a caulked portion provided in an end portion of the inner shaft so as to fix the coupler ring and the roller bearing to the inner shaft so as to be immovable in an axial direction of the inner shaft. An outer diameter of the coupler ring is set smaller than a diameter of a shoulder portion of the inner ring. Alternatively, a protruding portion is provided in any one of opposing end surfaces of the coupler ring and the inner ring, whereby the coupler ring is arranged away from a seal member. Accordingly, it is possible to avoid an interference of the coupler ring with the seal member.

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: An assist gradient Ra and also an F/B gain gradient Rp are inputted to an assist gradient compensation control unit. The F/B gradient Rp is added to the assist gradient Ra in an adder and the sum obtained is inputted into a switching control unit. The assist gradient Ra that has been inputted from a basic assist control unit is directly inputted together with the sum to the switching control unit. When a torque feedback control is executed, the switching control unit outputs the sum of the assist gradient Ra and F/B gain gradient Rp to a filter constant computation unit and an assist gradient gain computation unit.

Abstract: A speed change gear includes: a housing that has internal gears having different inside diameters; and a plurality of change gear units that are respectively in mesh with the plurality of internal gears and that change the speed of rotation from an input shaft to an output shaft. Each of the change gear units includes a rotating member that has one of a pin protruding in a direction along an input/output axis and an insertion hole; an eccentric member that centers on an eccentric axis that is eccentric with respect to the input/output axis; and an oscillating member that oscillatingly rotates as the eccentric member rotates about the input/output axis.

Abstract: A hub unit is configured such that nitrogen gas, which functions as inert gas, is filled in a rolling element arranging space which is defined by an inner circumferential surface of an outer ring and an outer circumferential surface of a hub body for arranging rolling elements therein in such a manner as to be sealed therein in a semi-hermetically closed state by a seal member and a cover, so as to prevent the nitrogen gas from flowing out to an exterior space. The seal member, which is provided at an end portion of the rolling element arranging space which end lies on a vehicle-outer side, is formed as an elastic seal element, and is fixed to the outer ring at one end whereas being secured to the hub body at the other end thereof while being elastically deformed, whereby the seal member has a function to prevent the intrusion of water from the exterior space into the rolling element arranging space.

Abstract: A parallel shaft gear mechanism (19a) for a steering assist of the present electric power steering apparatus (1) includes an idle gear (26) rotatably supported via a rolling bearing (39), on an outer peripheral surface (37d) of an intermediate shaft (37) supported by a rack housing (15). The idle gear (26) is arranged in an annular synthetic resin member (43) fixed on the outer peripheral surface (44a) of an outer ring (44) of the bearing (39). On the outer peripheral surface (44a) of the outer ring (44), a regulating portion (53, 53A, 53B, 53C, 53D, 53E, 53F, 53G, 54, 54A, 54B, 54C, 54D, 54E, 54F, 55, 56, 56A, 56B, 59, 59A, and 59B) for regulating relative rotation between the outer ring (44) and the synthetic resin member (43) is arranged. The synthetic resin member (43) is formed in a manner to cover the regulating portion on the outer peripheral surface (44a) of the outer ring (44), as a result of a molding process using a mold.

Abstract: The processing means, which control the power assisted steering motor (8), determine and give consideration to a first steering angle signal (A) determined as a function of the calculation or measurement of the force or torque delivered by the power assisted steering motor (8) and possibly of the steering torque or force applied by the driver to the steering wheel (2), a second steering angle signal (B) determined as a function of the calculation of the measurement of the angular position of the power assisted steering motor (8), a third signal (C) of the “index” type, that is to say of the type emitted for certain angular positions of the steering system (21), a convergence signal (D) indicative of the convergence of the steering angle calculations, and a confirmation signal (E) confirming the calculation of the steering angle, the convergence signal (D) being produced thanks to the signal (C) of “index” type to indicate a confidence level on the estimated steering angle value.

Abstract: A drive state control apparatus is applied to a vehicle which has not only a transfer including a multi-disc clutch mechanism but also a changeover mechanism interposed in an axle and which can be switched between 2WD and 4WD. When a 2WD-to-4WD changeover condition is satisfied, the multi-disc clutch is immediately switched from a “decoupled state” to a “coupled state.” Meanwhile, a connecting operation of the changeover mechanism is started upon establishment of a state in which left and right rear wheels have no acceleration slippage, and a state in which rotational speeds of first and second axles on opposite sides of the changeover mechanism are approximately equal to each other. In addition, in the case where the left and right rear wheels have acceleration slippage after the 2WD-to-4WD changeover condition has been satisfied, an E/G output reduction control is executed. Thus, the connecting operation can be performed smoothly.