Abstract: In a vehicle differential unit according to an embodiment of the invention, a planetary carrier that is a rotatable member that rotatably supports planetary gears is formed of cylindrical members that are unable to rotate relative to each other on the rotational axis of a pair of output shafts. The vehicle differential unit has a thrust force generation portion that receives a driving force from a drive source of a vehicle and generates a thrust force along the direction of the rotational axis of the pair of output shafts, and a relative movement limiting portion that limits a relative movement between the cylindrical members along the axial direction due to the thrust force when the vehicle is in the drive mode.

Abstract: A rolling bearing assembly includes a rolling bearing which includes a plurality of rolling elements interposed between an inner ring and an outer ring thereof and retained by a cage, the cage being in a sliding contact with a guiding surface provided on an inner periphery of the outer ring and a lubrication device for supplying a lubricant to the rolling bearing. The lubrication device includes an annular groove extending along the inner periphery of the outer ring in adjoining relation with the guiding surface of the outer ring and storing a grease therein and an annular grease reservoir member disposed in proximity to the annular groove and storing a grease therein. The grease stored in the grease reservoir member and the grease stored in the annular groove are interconnected by the grease present between the reservoir and the annular groove.

Abstract: In a thermal displacement compensating device and a thermal displacement compensating method for a machine tool, a block temperature obtaining section obtains temperatures of respective blocks based on temperature information detected by temperature sensors wherein temperatures in each of the respective blocks into which a column is divided to be pluralized are defined as a uniform value. An FEM analysis section performs a structural analysis by a finite element method based on the temperatures of the respective blocks obtained by the block temperature obtaining section and infers thermal displacement amounts of the column. A compensation value calculation section calculates a compensation value for a machining command position based on the thermal displacement amounts of the column inferred by the FEM analysis section. A compensation section compensates the machining command position by the compensation value obtained by the compensation value calculation section.

Abstract: A steering angle detecting unit, a reaction force actuator that applies steering reaction force to a steering member, a yaw angle detecting unit that detects a yaw angle of a vehicle body, and a reaction force actuator control unit that sets the steering reaction force as a function of a steering angle and that controls the reaction force actuator such that the reaction force actuator generates the set steering reaction force, are provided. The reaction force actuator control unit computes a turning angle of the vehicle body on the basis of a change in the yaw angle of the vehicle body, detected by the yaw angle detecting unit. When the computed turning angle is larger than or equal to a reference angle, the steering reaction force applied to the steering member is increased.

Abstract: In a material handling vehicle such as an electric forklift, a depression amount of an accelerator pedal that provides an instruction on a control amount of a drive motor for driving a drive wheel is detected. When the depression amount of the accelerator pedal is equal to or larger than a predetermined value and a forward-backward switching signal that indicates that a shift lever is operated is received, a drive current for a steered system motor is set to a value smaller than a normal drive current within a predetermined time period that starts upon reception of the forward-backward switching signal.

Abstract: A torque detection device includes: a torsion bar that couples a first shaft to a second shaft; a magnet that is fixed to the first shaft; and a pair of magnetic yokes that are fixed to the second shaft and that are arranged to face each other in an axial direction. Each of the magnetic yokes includes a yoke ring and a plurality of lugs that are arranged in a circumferential direction on the corresponding yoke ring. Each yoke ring includes an extending portion that extends radially outward from base portions of the lugs, and a bent portion that is bent in the axial direction from a radially outer end portion of the extending portion. The outer size of the pair of magnetic yokes in the axial direction is larger than or equal to the length of the magnet in the axial direction.

Abstract: A torque sensor computes a steering torque applied to a steering wheel on the basis of a difference between a rotation angle of an input shaft, which is detected using a first resolver, and a rotation angle of a lower shaft, which is detected using a second resolver. A planetary gear mechanism that includes a sun gear that rotates together with the input shaft, a planetary gear that is made of a magnetic material and that revolves around the sun gear and an internal gear that is in mesh with the planetary gear is provided. A rotation angle of the input shaft and a position of the planetary gear are detected on the basis of voltage signals output from the first resolver, and a steering angle of the steering wheel is obtained on the basis of the detected rotation angle and the detected position.

Abstract: A hydraulic power steering system includes a rotation angle sensor that detects a rotation angle of a shaft. A rotary valve includes a valve element that rotates together with the shaft of an electric motor and a housing that has an internal space connected to oil passages. A control unit reflects an output from the rotation angle sensor on control of the electric motor.

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 lubrication monitoring device monitors a lubricating condition of a lubricator feeding an oil droplet at a predetermined time interval by means of a discharge nozzle having a nozzle orifice. The lubrication monitoring device comprises: a pair of electrodes disposed in the proximity of the nozzle orifice; a capacitance detecting portion for detecting the variation of capacitance between the pair of electrodes, the capacitance varying in conjunction with the varying amount of oil fed from the nozzle orifice to space between the pair of electrodes; and a determination portion for determining whether the oil droplet is fed at the predetermined time interval or not, the determination made based on the detection result supplied from the capacitance detecting portion.

Abstract: Provided are an electric power steering system and a vehicle steering system each including rack-and-pinion mechanisms (14A, 14B). A rack shaft (3) has a first rack (7A) and a second rack (7B) that are formed on the axially opposite sides of the axial center of the rack shaft (3). The first rack (7A) has a regular pitch p between rack teeth, the second rack (7B) has a regular pitch p between rack teeth, and these pitches p are equal to each other. A predetermined difference is set between the phase of gear teeth engagement between a first pinion shaft (8A) and the first rack (7A), which constitute the first rack-and-pinion mechanism (14A), and the phase of gear teeth engagement between a second pinion shaft (8B) and the second rack (7B), which constitute the second rack-and-pinion mechanism (14B).

Abstract: Three links (40) within one width-direction unit (54) are included in respectively different link units (46). The links in the first row and the sixth row from the right end and the left end of a chain are included in the same link unit (first link unit 46-1). The links in the second row and the fifth row are included in the same link unit (second link unit 46-2). The links in the ninth row and the tenth row are included in the same link unit other than the link unit in which the links in the second row and the fifth row are included (first link unit 46-1 or third link unit 46-3). With the above structure, the stress amplitude of the links forming a chain for a chain-type continuously variable transmission can be reduced.

Abstract: A variable flow-rate hydrostatic bearing includes a variable flow-rate adjusting portion that reduces the flow rate of fluid and then introduces the fluid into a pocket. The variable flow-rate adjusting portion is configured such that a fluid supply chamber is separated from a fluid storage chamber having a projection by a leaf spring that faces the projection with a predetermined clearance left therebetween, and the projection has an opening and a flow passage that is in communication with the pocket. In the variable flow-rate hydrostatic bearing, a fixed orifice that provides communication between the fluid supply chamber and the fluid storage chamber is formed in the leaf spring at a portion that does not face the projection.

Abstract: It is an object of the present invention to provide a controller for a steering apparatus having easy operation of an adjustment of a tilting angle. The steering apparatus comprises a tilting mechanism adjusting a tilting angle of a steering wheel, and an electrical motor driving the tilting mechanism. The controller for the steering apparatus 1 detects the tilting angle based on a rotational angle of the screw shaft. The controller defines the predetermined supplying current according to the detected amount of the tilting angle as the supplying current to the electrical motor.

Abstract: A wheel bearing device includes an inner shaft and an inner ring member fitted onto an outer periphery of an axially-inner end portion of the inner shaft. A shaft portion coupled to the inner shaft so as to be rotatable together with the inner shaft is inserted in a center hole of the inner shaft. Spline grooves spline-fitted to spline teeth formed on an outer periphery of the shaft portion are formed in an inner periphery of the inner shaft, which defines the center hole. An annular clearance that suppresses reduction in a diameter of the inner shaft due to fitting of the inner ring member onto the inner shaft is formed between the inner ring member and the axially-inner end portion of the inner shaft, within a range where an axial range in which the spline teeth are formed overlaps with an axial range of the inner ring member.

Abstract: A chain is formed by coupling chain elements including plate-shape links arranged in the width direction of the chain and pins (42) extending through the links in the width direction of the chain, in the circumferential direction of the chain. The pin (42) is clamped between two opposing substantially conical surfaces 24 and 26 of a pulley (12). The deformation ratio of the pin length when the pin is clamped by the pulley is set to be 1.3×10?6 (1/N) or greater. The deformation ratio of the pin length is represented by (deformation ratio)=?L/(F×L), wherein L indicates a length of the pin, F indicates a load applied to the pin, and ?L indicates a deformation quantity. Thus, noise of a chain-type continuously variable transmission in the frequency band of 3 to 5 kHz can be reduced.

Abstract: In a state in which a first ball 103 is assembled in between a first inner peripheral raceway surface of an outer ring 105 and an outer peripheral raceway surface of a shaft 101, and a second ball 104 is placed in between a second inner peripheral raceway surface of the outer ring 105 and an outer peripheral surface of the shaft 101, a first distance “a” from a plane “q” generally perpendicular to a central axis “p” of the shaft 101 to the second ball 104 and a second distance “b” from the plane “q” to a stepped portion 107 of the shaft 101 are measured. Then, the size in the axial direction of the inner ring 102 is adjusted on the basis of a difference between the first distance “a” and the second distance “b”.

Abstract: An electric power steering apparatus includes a power supply and a power supply management unit that controls an operation of the power supply. The power supply includes a main power supply, an auxiliary power supply connected in series to the main power supply, a boost circuit that charges the auxiliary power supply by boosting an output voltage of the main power supply and applying the boosted output voltage to the auxiliary power supply, and a voltage sensor that detects an output voltage of the auxiliary power supply. When a reduction amount per unit time of the output voltage detected by the voltage sensor exceeds a voltage reduction amount over a predetermined time, the power supply management unit determines that an abnormality has occurred in an output destination of the power supply.

Abstract: A trajectory extracting step of extracting a relative movement trajectory of each convex tooth pin of a mating gear with respect to a concave-convex gear at the time when torque is transmitted between the mating gear (fixed shaft) and the concave-convex gear (nutation gear) and a machining step of, when the concave-convex gear is machined on a concave tooth forming face of a disc-shaped workpiece on which the concave teeth have not been machined, moving at least one of the disc-shaped workpiece and a working tool such that a relative movement trajectory of the working tool with respect to the disc-shaped workpiece coincides with the relative movement trajectory of each convex tooth pin with respect to the concave-convex gear, extracted in the trajectory extracting step, are included.

Abstract: The outer diameter of a spline nut and the inner diameter of a nut body holding portion of a housing gradually decrease in the downward direction. A ball screw protection unit includes a nut body taper face that is formed in the outer peripheral face of the spline nut, a holding portion taper face that is formed in the nut body holding portion, and a disc spring that is provided at the upper end of the spline nut and that biases the spline nut in such a direction that a friction force between the nut body taper face and the holding portion taper face increases (downward direction).