Abstract: An electric power steering apparatus including a steering system into which steering torque is inputted, an electric motor for imparting steering assist force to the steering system, a controller for controlling a energizing state of the electric motor according to the steering torque, a terminal board electrically connected to the electric motor, and a control unit provided with a connector, wherein a mounting face of the electric motor with respect to the control unit, a mounting face of the terminal board with respect to the control unit, and a mounting face of the connector with respect to the control unit are arranged on a same plane.

Abstract: A linear guide device has a guide rail 12, a slider body 15, an end cap 16, a large number of rolling bodies 18, and separators 22. The slider body 15 has a slider side rolling body raceway surface opposed to a rail side rolling body raceway surface 13 formed on the guide rail 12. The end cap 16 has a rolling body direction switching path 21 communicating with a rolling body load rolling path 19 formed between both rolling body raceway surfaces of the guide rail 12 and the slider body 15 and also communicating with a rolling body return path 20 formed in a penetrating manner in the slider body 15, along the longitudinal direction of the guide rail 12. In conjunction with relative linear movement of a slider 14 constituted of the slider body 15 and the end cap 16, the rolling bodies 18 roll in the rolling body load rolling path 19, the rolling body return path 20, and a rolling body direction switching path 21. The separators 22 are arranged between every two adjacent rolling bodies 18.

Abstract: A motor driving control device includes a current instruction value computing section 31 which computes a current instruction value for driving a brushless motor 12, a motor current detector 38 which detects a motor current of the brushless motor 12, a current controller 34 which computes a voltage instruction value based on the current instruction value and the motor current, and a rotation information detector 22 which detects an electric angle and a rotation angular velocity of the brushless motor, and the motor driving control device includes a disturbance compensation voltage computing section 41 which computes a disturbance compensation voltage value base on the current instruction value, the electric angle of the brushless motor, and the rotation angular velocity of the brushless motor, and a feed-forward compensator 35 which corrects a voltage instruction value outputted from the current controller based on the disturbance compensation voltage value computed by the disturbance compensation voltage com

Abstract: A sealing device 12b of a hub unit bearing O has a first slinger 16 fixed to an inner ring 5, a second slinger 17 fixed to an outer ring 1, and a sealing portion 18 which is fixed to the first slinger 16 and is slide-contacted with the second slinger 17. A magnetic encoder 20 is fixed to the first slinger 16. The magnetic encoder 20 and the sealing portion 18 are bond-fixed to the first slinger 16 with the same adhesive agent.

Abstract: A ball screw in which surface hardness of balls is higher than both of surface hardness of a ball screw groove of a screw shaft and surface hardness of a ball screw groove of a nut, and a solid lubricant film is formed on a surface of the balls with a thickness of 1 ?m or more and 5 ?m or less. Further, cross-sectional shape of grooves 11 and 21 of a screw shaft 1 and a nut 2 is a Gothic arc. A ratio (R/D) of a radius (R) of the arcuate cross-section of the groove 11 with respect to diameter (D) of balls 2 is set to 51.0% or more and 52.0% or less. The solid lubricant film made of MoS2 is formed on the surface of the balls 3 with a thickness of 0.5 ?m and 3.0 ?m or less.

Abstract: A torque detection portion includes a first arm having a detection coil L1 and a resistor R1, and a second arm having a detection coil L2 and a resistor R2. When a test mode is set, a reference voltage Vref having an abnormal value is outputted to a monitoring portion 13. An abnormal condition is intentionally caused in the monitoring portion 13. A main torque signal Vtm is compared with a sub torque signal Vts in the monitoring portion 13. When the reference voltage Vref set in the monitoring portion 13 has the abnormal value, a sub torque signal Vts having a level of 0 (Vts=0) is forcibly outputted in a normal condition. Then the signal Vtm is equal to the signal Vts, the monitoring portion 13 determines that a shortcircuit occurs between a main torque signal line and a sub torque signal line.

Abstract: An electrically driven power steering apparatus is structured such that a large impact on a rack shaft occurs upon an impingement of a steering stopper, and, even when an axial force acting on a ball bearing of a presser member becomes zero, a rotation of the presser member is hindered by caulking c at a thin plate member. Therefore, the presser member does not slacken, and a predetermined axial force can be given again to the ball bearing when the impact dissipates. The thus structured power steering apparatus exhibiting, though the cost is low, an excellent shockproof characteristic and capable of preventing the bearing from coming off a ball screw nut, can be provided.

Abstract: An object of the invention is to provide a grease composition capable of keeping a good lubrication condition for a long period of time even when water has mixed therein, thereby inhibiting white structure flaking and corrosion. Another object is to provide a vehicular hub unit bearing which hardly suffers from white structure flaking and corrosion even when used in an environment where water may penetrate into it and which therefore has a long life. The invention provides a rolling bearing with, sealed up therein, a grease composition containing a waterproof film-forming additive added thereto; a grease composition for hub unit bearings, containing a base oil that comprises at least one of mineral oil and synthetic oil as the main ingredient thereof, and a thickener and a flaking inhibitor; and a vehicular hub unit bearing with the grease composition sealed up therein.

Abstract: A rolling bearing fixing device includes at least one bearing having mutually rotatable inner and outer rings, a housing having at least one fitting hole into which the bearing is fitted and a bolt insertion hole, a pair of fixing plates having at least one large-diameter hole and a bolt insertion hole; and a bolt inserted from one axial end into the bolt insertion hole of one fixing plate, the bolt insertion hole of the housing, and the bolt insertion hole of the other fixing plate, and connects the housing with the pair of fixing plates. Both axial end parts of the outer ring are held by the pair of fixing plates in the axial direction, the inner ring is positioned further inwardly of the large-diameter hole of the fixing plates in the radial direction and the inner ring is rotatable with respect to the fixing plates.

Abstract: A steering angle sensor detects a rotational angle of a steering system whose steering is assisted by driving of an electric motor via a reduction mechanism so as to calculate a steering angle of a steering wheel. The steering angle sensor includes: a sensor wheel operating simultaneously with rotation of a steering shaft; and an absolute angle calculating unit for calculating an absolute steering angle based on a steering angle signal from the sensor wheel. The sensor wheel includes a GMR element and a magnetizing portion which is arranged around the GMR element, and the rotational angle is detected by making two turns of the steering shaft as one cycle of the steering angle signal based on a change in resistance value of the GMR element obtained by changing a magnetic field direction according to a rotation of the magnetizing portion.

Abstract: A separator for use in a linear guide apparatus including a guide rail, a slider, and a plurality of rollers which circulate along an endless circulation passage provided in the guide rail and the slider and having guide grooves. The separator includes a separator body interposed between the rollers and having a pair of roller contact surfaces respectively opposing outer peripheral surfaces of the adjacent rollers, and a pair of arm portions which are guided by the guide grooves. A surface of each of the arm portions opposing the guide groove is formed such that an opposition distance with respect to the guide groove becomes wider from a fixed end side of the arm portion toward a free end thereof.

Abstract: A method for manufacturing a variator component of a continuously variable transmission having a plurality of cylindrical sections and a plurality of ball spline grooves, which are provided alternately in an inner radial region of the variator component. The method includes: simultaneously finishing the cylindrical sections and the ball spline grooves through use of a hard broaching tool; and finishing functional surfaces provided on side surfaces of the variator component while taking the cylindrical sections as a machining reference.

Abstract: According to the hydroforming method by the invention, when slots with the aspect ratio of 3 or more are pierced onto the bulge-formed portion made by the hydroforming, even the piercing can be carried out within a series of processing steps in the hydroforming, thereby eliminating the piercing operation by means of the cumbersome machining process such as milling and ensuring an excellent slot configuration. Thus, the hydroformed parts by the invention are best suited for the automobile parts etc. where various piercing operations are required, and the mold used for the hydroforming method by the invention can be widely employed for processing the automobile parts etc., whereby the invention can be applied for processing the parts in automobiles and industrial machineries as well.

Abstract: The rotor of a braking apparatus is fitted onto a cylindrical positioning portion 19a, and in this condition, fixed to the hub 8a using bolts which are threaded into the screw holes 11a in the rotating flange 10a, and tightened. As the hub 8a rotates, the runout in the radial direction of the outer peripheral surface 20a of the cylindrical positioning portion 19a is controlled up to 15 ?m, to suppress the runout of the vehicle wheel. With this construction, running performance such as riding comfort and diving stability is improved.

Abstract: A linear guide apparatus has: a guide rail; a slider including a slider body; and a pair of end caps; a guide groove guiding the arm portions of the separators in a circulation direction of the cylindrical rollers when the cylindrical rollers circulate through the pair of the rolling element rolling grooves, the direction change paths, and the rolling element path; and separators each having: a separator body; and an arm portion integrally formed on the separator body, wherein a width of the guide groove is larger than that of the arm portions, the width of the guide groove in a region of each of the direction change paths is larger than that in a region where the cylindrical rollers linearly move, and end portions of each of the arm portions are Chamfered and directed in the circulation direction.

Abstract: A toroidal type continuously variable transmission has an input shaft to which a rotation torque is input, an input side disk and an output side disk that are concentrically and rotatably supported by the input shaft in a state that an inner peripheral surface of the input side disk opposes to an inner peripheral surface of the output side disk, a power roller held between the input side disk and the output side disk and a hydraulic loading device applying predetermined pressing force so that the power roller is pressed between the input and output side disks. Fine grooves are formed on at least a radially inner part of the inner peripheral surface of the input side disk and at least radially outer part of the inner peripheral surface of the output side disk, respectively.

Abstract: A linear guide apparatus is provided with two (upper and lower) tracks of rolling element race tracks formed on a guide rail and of rolling element race tracks formed on a slider main body so as to oppose the rolling element race tracks on the respective sides, i.e., four tracks of race tracks in total. A recess is provided below the lower rolling element race track on the slider main body and the end cap fixed to an end face of the slider main body is provided with a projection that engages with the recess so as to determine a position of the end cap.

Abstract: Power roller-side concave grooves are opposed to disk-side concave grooves 19, 19 so as to have angles therebetween in a rolling contact area between a peripheral surface of the power roller and a one-side surface 17 of a disk 16 in an axial direction regardless of a transmission gear ratio of a toroidal continuously variable transmission. Accordingly, the disk-side concave grooves 19, 19 are formed so as to have angles with respect to a circumferential direction of the disk 16 when viewed from a normal direction relative to the one-side surface 17 in the axial direction. Meanwhile, the power roller-side concave grooves are formed into a concentric shape (or a spiral shape) about a central shaft of the power roller. As a result, it is possible to prevent a decrease of a contact area in the rolling contact area regardless of the transmission gear ratio.

Abstract: The invention provides a drive control device for the motor as well as an electric power steering apparatus using the motor and the drive control device. Respective phase current command values are calculated on the basis of vector control. Pseudo-vector control for controlling respective phases separately is used as current feedback control.

Abstract: A motor drive control device includes: a generation part for generating a current command value; a current detection part for detecting a drive current of an electric motor; a motor feedback control part for controlling feedback of the electric motor based on the current command value and a drive current detection value; a prefilter with order of one or more for adjusting the current command value, the prefilter being interposed between the generation part and the motor feedback control part; and a series compensator with order of two or more for determining a voltage command value of the motor feedback control part based on the current command value adjusted by the prefilter and the drive current detection value of the electric motor.