Abstract: An electric power steering apparatus includes a speed reducing mechanism for decelerating the rotation of a rotatable shaft in an electric motor and a converting mechanism for converting the output rotation of the speed reducing mechanism into the axial movement of a steering shaft extending toward the right and left sides of a vehicle. The speed reducing mechanism includes an input pulley driven by the electric motor, an output pulley arranged with the steering shaft enclosed thereby, a belt for connecting the input pulley and the output pulley to each other, and a belt tension adjuster.

Abstract: In a solenoid valve 10, an annular oil groove 66 is formed at a portion corresponding to a spring chamber 56 on the external surface of a sleeve 19, a drain passage 68 is formed to make an upper part of the annular oil groove 66 communicate with the outside of an insertion bore 61, and a throttle hole 67 is provided at a lower part of the annular oil groove 66 for making the annular oil groove 66 communicate with the spring chamber 56. Since the annular oil groove 66 communicates with the outside of the insertion bore 61 at its upper part through the drain passage 68, it can be realized to store the operating oil to the height of the upper part of the annular oil groove 66, so that the operating oil can be reserved in the spring chamber 56 which communicates with the annular oil groove through the throttle hole 67. Further, the operating oil is supplied from a feedback port 48 next to the spring chamber 56 through a clearance between the spool valve 19 and a valve hole 18.

Abstract: An electronic control unit includes an electronic circuit substrate and a casing that accommodates the electronic circuit substrate. A plurality of electronic components are mounted on the electronic circuit substrate. A plurality of connector terminals extend through a side wall of the casing for electrically connecting the electronic circuit substrate to external wires. A retainer portion capable of retaining liquid seal agent is arranged at an inner side of the wall through which the connector terminals extend.

Abstract: A differential (1) for a vehicle includes a differential case (2), side gears (5L, 5R) rotatably accommodated in the differential case (2), pinion gears (3, 4) engaged with the side gears (5L, 5R), and pinion gear shaft (50) inserted through the pinion gears (3, 4) to be supported by the differential case (2), in which the differential case (2) has pinion gear supporting portions (10, 11) for rotatably supporting the pinion gears (3, 4), respectively, the pinion gear shaft (50) has pinion gear supporting surfaces (50A, 50B) for rotatably supporting the pinion gears (3, 4), respectively, and the pinion gear supporting surfaces (50A, 50B) are disposed on a side of an axis line of rotation of the differential case (2) with respect to the pinion gear supporting portions (10, 11).

Abstract: An angle computing section determines an angle of a rotor, and an angular velocity computing section determines angular velocity of the rotor. A command current computing section determines, from a steering torque and vehicle velocity, command currents and taken along d-q axes. An open loop control section determines, from command currents and angular velocity, command voltages taken along the d-q axes in accordance with motor circuit equations. A d-q axis/three-phase conversion section converts the command voltages into command voltages of three phases. A ? computing section determines the number of armature winding flux linkages included in a motor circuit equation from a q-axis command voltage, the current value detected by a current sensor, and the angular velocity. Circuit resistance including armature winding resistance R included in the motor circuit equation may also be determined by means of the same configuration.

Abstract: Crowing is applied to a side surface of an inner ring which abuts against a side surface of a drive shaft in a radial direction. With this construction, when the two side surfaces abut against each other by a pressing operation of a threadedly-engaged nut at the time of connecting the drive shaft and an inner shaft, a contact pressure distribution of abutting surfaces is made generally uniform, thereby suppressing the occurrence of an edge load. By thus preventing a contact pressure from increasing at part of the abutting surfaces, energy released by a stick-slip phenomenon is reduced, and a sound pressure level of an abnormal sound generated at this time is reduced.

Abstract: A press-fitting apparatus includes a first retaining jig having a required number of pin insertion holes into which generally longitudinally half portions of pins and interpieces can be inserted, a second retaining jig having a required number of pin insertion holes into which one end portions of the pins and interpieces can be inserted, and pressing jigs each for pressing the link into a predetermined position relative to the pins and interpieces. In the press-fitting of the links, the press-fitting operation is divided into two steps, and in each of the two steps, the links are stacked from central portions of the pins and interpieces.

Abstract: A microcomputer (an electric current command value calculating section) carries out field weakening control in which a d-axis electric current command value Id* is set to a negative value in correspondence with rotation angular velocity ? of a motor. The microcomputer determines whether an anomaly has occurred in an EPS. If it is determined that an anomaly is in a power supply system (step 202: YES), the microcomputer determines whether the anomaly in the power supply system is failure of electric current flow in any phase (step 203). If it is determined that electric current flow has failed in a certain phase, the microcomputer prohibits the field weakening control and outputs a motor control signal instructing to use two other phases free from the failure of electric current flow as electric current flowing phases (two phase drive mode, step 204).

Abstract: A manufacture method of a power transmission chain pin includes a work step of working a bar-like member of a predetermined length into a pin having a final sectional shape and a final end portion shape with a guide portion to facilitate a press-fitting operation by a cold forging work. At this time, the manufacture method does not include a grinding step of grinding an end portion of the bar-like member of the predetermined length by a grinding stone.

Abstract: A constant velocity joint includes an outer race having a plurality of ball grooves formed in an inner spherical surface thereof, which ball grooves extend in a direction of a rotation axis of the outer race, an inner once having a plurality of ball grooves formed in an outer spherical surface thereof, which ball grooves extend in a direction of a rotation axis of the inner race and are paired with the ball grooves of the outer race, and a plurality of balls disposed between the ball grooves of the outer race and the ball grooves of the inner race. In the constant velicity joint, the ball grooves of at least one of the outer race and the inner race are partially formed with relief profiles to provide a plurality of relief groove portions such that a load applied to each of the balls located in the relief groove portions during torque transmission between the inner race and the outer race is smaller than a load applied to each of the balls located in the other portions of the ball grooves.

Abstract: In a one-way clutch integrated with a rolling bearing, rolling elements and sprags are arranged in an annular space between an inner race and an outer race in each of which a one-way clutch raceway surface is formed in one axial side of a rolling bearing raceway surface. The rolling elements and the sprags make contact with respective raceway surfaces and are respectively housed in circumferentially spaced pockets formed in a common cage configured by mutually engaging and integrating two annular members in an axial direction. The one-way clutch includes urging means for urging the sprags in a locking direction in the pockets. An annular flat plate portion which seals one axial end portion of the annular space between the inner race and the outer race is integrally formed in one of the two annular members constituting the cage. Respective at least one radial and axial through holes are formed in the annular member.

Abstract: A gap with a predetermined size is formed between adjacent links arranged in a chain width direction, the size of the gap is set smaller than a maximum warpage amount of the links.

Abstract: There is provided a steering apparatus to ease an uncomfortable feeling given to an operator when a steering wheel is connected to a steering mechanism, on a fail. The apparatus includes a unit that varies an angular ratio of a steering angle of front wheels with respect to an operational angle of a steering wheel. The apparatus also includes a connection unit such as a electromagnetic clutch for connecting the steering wheel to the steering mechanism in order to fix the angular ratio, on a fail such as a failure of a steering motor. The apparatus also includes a rotational body which relatively rotates with respect to the steering wheel by an angular deviation upon this connection. Accordingly, since a real neutral position of the steering mechanism coincides with a neutral position recognized by a pattern on the rotational body being seen, it eases the uncomfortable feeling onto the operator.

Abstract: A gear includes a metal core and a synthetic resin tooth body. The metal core includes a cylindrical portion, and a disc portion that extends inwardly in a radial direction from one end of the cylindrical portion. The synthetic resin tooth body is coupled to the cylindrical portion of the metal core. A plurality of rotation prevention grooves is formed on the outer peripheral portion of the cylindrical portion, and a plurality of rotation prevention grooves is formed on the inner peripheral portion of the cylindrical portion.

Abstract: When it is determined that the torque output from the electric motor abnormally fluctuates or the torque output from the electric motor varies between clockwise and counterclockwise turning operations of the driver's steering wheel, the steering assist control is continued if the vehicle speed v is equal to or lower than the reference speed v0. In this case, the width of the dead band of the steering torque in the assist map used to calculate the target assist torque is increased. Thus, only in a case where the vehicle is moving at a low speed and the driver's steering wheel is operated with a great force, the steering assist torque is produced to alleviate the burden on the driver. In the other cases, the electric motor is stopped to minimize a sense of discomfort in the steering operation.

Abstract: A torque distribution-controlling apparatus, by which a torque from a driving power source is distributed to vehicle right and left wheels via right and left axles, includes a differential having a first torque transmitting system and a second torque transmitting system, the first torque-transmitting system which transmits the torque from the driving power source to the vehicle right and left axles, and allows differentiation between these right and left axles, and the second torque-transmitting system which is structured to be symmetric to the first torque-transmitting system, transmits the torque from the driving power source to the right and left axles, and allows differentiation between these right and left axles; a left clutch controlling transmission of the torque from the first torque-transmitting system to the left axle; and a right clutch controlling transmission of the torque from the second torque-transmitting system to the right axle.

Abstract: In a rolling bearing apparatus for a wheel including a fixing flange having a plurality of bolt holes through which male thread portions of bolts for fixing the bearing apparatus to a vehicle body side member are respectively passed, one side surface of the fixing flange includes bolt seat surfaces in a round shape which are formed by cutting work concentrically with respective centers of the bolt holes, each of the bolt seat surfaces having a larger diameter than a head portion of the bolt.

Abstract: It is one object of the present invention to provide a program writing method of numerical controller, a numerical controller and a cutting machine controlled thereby achieving to write a plurality of programs relating to one axis to perform a high efficiency in the small lot of productions. A next or later user-set-program controlling a duplicated axis controlled by plural user set programs identifies a virtual axis virtually controlled by own user set program, a program is written to replace the duplicated axis to the virtual axis. A control amount calculated by the user set program identifying the virtual axis is added to a control amount input to a correspondent axis driving program as a control amount of duplicated axis before replacing to the virtual axis.

Abstract: A method of producing a busbar structure includes a busbar arranging step for arranging a plurality of the busbars at predetermined positions in a cavity which is formed between a fixed mold and a movable mold which can be clamped and opened with respect to the fixed mold, and clamping the two molds, a resin filling step for filling molten resin into the cavity in which the busbars have been arranged, and a busbar fixing step for hardening the molten resin which has been filled thereby to fix the busbars at predetermined positions with the hardened resin, and opening the two molds. Interposed pins to be interposed between the busbars which are arranged in close proximity to each other are detachably disposed in an engaged part of the movable mold, and removed from a molded product when the two molds are opened.

Abstract: An axle bearing apparatus includes a hub shaft including a wheel-mounting flange formed at its outer end portion, and a cylindrical portion formed on an inner side surface of the flange, a bearing portion press-fitted on the cylindrical portion of the hub shaft and including an inner ring, an outer ring and rolling elements disposed between the inner and outer rings, and a slinger having a through hole formed through its central portion. The through hole is fitted on the cylindrical portion such that an outer diameter of the slinger is generally equal to an outer diameter of the flange, and the slinger is press-clamped to the inner side surface of the flange by bolts press-fitted respectively in a plurality of bolt holes formed in the flange. O-rings are interposed between the flange and the slinger.