Abstract: A rack-parallel electric power steering device includes a housing that covers the periphery of a speed reducer, and a drain valve provided in the housing. The drain valve includes a first case, a second case mounted to the outer peripheral portion of a bottom portion of the first case, and a valve element that closely contacts a bottom surface of the first case. A through hole is formed in the bottom portion of the first case. The second case includes a bottom portion which is disposed with a gap from the bottom portion of the first case and in which discharge holes are formed. The valve element is an elastic member that blocks an opening portion of the through hole of the first case and that is held between the first case and the second case.

Abstract: A rolling bearing apparatus includes a lubrication unit provided adjacently to an annular space formed between an inner ring and an outer ring. The lubrication unit includes a tank that stores a lubricant to be supplied to an annular space and that has an outlet portion through which the lubricant flows out. The tank has a flexible bag in which the lubricant is stored. The bag is filled with the lubricant and allows the lubricant to flow out through the outlet portion as a volume of the bag decreases.

Abstract: A steering system includes a second tooth defining member and an energy absorbing unit. The energy absorbing unit includes energy absorbing portions each including a first portion extending upward in a column axial direction from a restraining portion restrained in the column axial direction and a second portion formed by folding back the energy absorbing portion at a fold-back portion, the energy absorbing portions being separated from each other in a first orthogonal direction, and a coupling portion that couples the second portions together and moves together with the second tooth defining member at the time of the secondary collision. At the time of the secondary collision, the energy absorbing portions allow the fold-back portions to move downward in the column axial direction to absorb impact energy while guiding downward movement of the second tooth defining member in the column axial direction between facing edges of the energy absorbing portions.

Abstract: A steering system includes an outer jacket including a pair of clamped portions disposed on both sides of a slit, an inner jacket coated with an insulating coating layer all along an outer periphery of the inner jacket except for a predetermined area, an upper bracket that supports the clamped portions and that is fixed to a vehicle body, and a clamping mechanism including a clamping shaft that is supported in clamping shaft insertion holes in the clamped portions so as to be energized. The steering system further includes a conductive elastic member including a first portion engaged with one of a slit inside portion of the clamping shaft positioned in the slit and the predetermined area so as to be energized and a second portion that slide-contacts the other of the slit inside portion and the predetermined area.

Abstract: In a drive assist control apparatus, based on a pinion angle command value and an LKA angle command value, a distribution ratio calculation unit calculates a distribution ratio that is a proportion of the LKA angle command value in a sum of the LKA angle command value and the pinion angle command value. An LA determination unit compares an LA threshold with a lateral acceleration that is related to the LKA angle command value and that is a product of a lateral acceleration and the distribution ratio, and determines whether or not to attenuate the lateral acceleration. When the lateral acceleration is determined to be attenuated, an LKA angle command value correction unit uses a low pass filter to progressively reduce the LKA angle command value to generate a filtered LKA angle command value.

Abstract: A roller bearing cage according to one aspect of the invention is a cage having a ring shape for retaining an interval along a circumferential direction between a plurality of rolling elements in a roller bearing. The roller bearing cage includes: a plurality of bar-shaped members which are arranged along the circumferential direction and which restrain movement of the rolling elements along the circumferential direction; a plurality of connecting members, each of which connects end portions along a lengthwise direction of the bar-shaped members adjacent to each other along the circumferential direction; and a fixing structure which fixes the bar-shaped member and the connecting member so as to be relatively unrotatably around an axis line along the lengthwise direction of the bar-shaped member.

Abstract: A pump housing, a fixing member and a holding member are assembled in the axis direction of an oil pump to fix a stator and a rotor of a brushless motor. The holding member is made of metal material and has a cylindrical shape that extends from its bottom portion toward one side in the axial direction. The fixing member is a cylindrical metal member. Stepped portions, extending in the circumferential direction, are formed in the outer periphery of the holding member and the inner periphery of the fixing member, and contact each other. The outer periphery of the holding member engages with the inner periphery of the fixing member. The outer periphery of the other end portion of the fixing member is fitted to the inner periphery of a flange portion projecting from the end face of the pump housing, which is adjacent to the brushless motor.

Abstract: The present invention discloses a machining control apparatus capable of decreasing a machining error, comprising: a rotation velocity decision process part for deciding a rotation velocity of the rotation tool in such a way that an amplitude of vibration of the rotation tool is decreased, based on a vibration state of the rotation tool and a vibration phase of the rotation tool when the rotation tool receives the cutting resistance force, in the case that the rotation tool vibrates due to the interrupted cutting resistance force generated in the rotation tool during the interrupted cutting; and a rotation velocity control part for controlling the rotation velocity(S) of the rotation tool based on the rotation velocity decided.

Abstract: In a state where a first truer rotation axis is maintained parallel to a grindstone rotation axis, a grindstone outer circumferential surface, and outer circumference arcuate surfaces which are partial surfaces of grindstone arcuate surfaces, and which are continuous to the grindstone outer circumferential surface are trued by using a first truer. In a state where a second truer rotation axis is maintained in a direction perpendicular to the grindstone rotation axis, grindstone end surfaces, and end surface arcuate surfaces which are remaining surfaces of the grindstone arcuate surfaces, and which are continuous to the grindstone end surfaces are trued by using a second truer.

Abstract: A rolling bearing apparatus includes a bearing portion having an outer ring, an inner ring, a plurality of balls, and a cage that holds the balls, and an auxiliary portion provided adjacently to the bearing portion in an axial direction. The auxiliary portion has an auxiliary body portion provided adjacently to the outer ring in the axial direction and an extension portion extending in the axial direction from the auxiliary body portion and interposed between the cage and the inner ring. In the extension portion, a channel is formed that penetrates the extension portion in a direction inclined with respect to a radial direction. The channel is open in an outer peripheral surface of the extension portion, which faces the cage, and in an inner peripheral surface of the extension portion, which faces the inner ring.

Abstract: A steering system includes a pinion shaft with pinion teeth formed thereon, a rack shaft with rack teeth formed thereon and meshing with the pinion teeth, and a pair of stoppers that regulates movement of the rack shaft at right and left stroke end positions of the rack shaft. The rack teeth are formed such that the rack teeth on a first end side of the rack shaft and the rack teeth on a second end side of the rack shaft are asymmetric with respect to a reference position, the reference position being an area of the rack teeth, in which the rack teeth mesh with the pinion teeth in a steering neutral state. In regard to a stroke position of the rack shaft, the stroke end positions are each offset from a peak generation stroke position where a dedendum stress of the rack teeth based on meshing transmission via the pinion teeth reaches a peak.

Abstract: A fiber reinforced thermoplastic resin member is formed by impregnating continuous fibers with a thermoplastic resin. As surfaces of the fiber reinforced thermoplastic resin member, surface layers are provided which are formed of a thermoplastic resin having a higher molecular weight than the thermoplastic resin.

Abstract: In a power steering system, when power is on, a normal mode process is executed and a target rotational speed is set based on a rotational speed map for a normal mode. When the normal mode process is being executed, if a first mode switching condition that a detected vehicle speed is equal to or lower than a prescribed value, the absolute value of a detected steering angle is equal to or greater than a prescribed value, and the absolute value of a detected steering, angular velocity is equal to or less than a prescribed value is satisfied, the target rotational speed is set based on a rotational speed map for a rack end mode.

Abstract: A corner is formed at a small-diameter-side end portion of a cage. The cage is disposed such that the axial position of a tip of the corner substantially coincides with the axial position of a large end face of an outer ring. Thus, a cylindrical space formed between an inner periphery cylindrical face of the outer ring and an outer periphery cylindrical face of the cage is filled with an oil low pressure region. As a result, the inflow of the oil into a bearing is restricted.

Abstract: A processor unit in an electric power converter executes detection of an overheating predicted state that is a stage prior to overheating of the IGBTs, a short circuit predicted state that is a stage prior to a short circuit in the arms, and a voltage drop predicted state that is a stage prior to a drop in a control voltage to be supplied to a driver circuit. When none of these predicted states is detected, a determination that an abnormality is not caused in the power module based on a latch signal is made by the processor unit. When an overheating predicted state is detected, the processor unit lowers the duty ratio of a motor control signal. When a short circuit predicted state is detected, the processor unit prolongs the dead time in which the upper IGBTs and the lower IGBTs are both maintained in the off-state.

Abstract: A steering apparatus includes a first member which rotates together with an operation lever which is operated to rotate and a third member which is supported rotatably via a friction reducing mechanism by a second member which is restricted from rotating. A cam mechanism which brings a fixed side plate into press contact with a column side plate includes an axially facing surface which is provided on the first member and on which a cam surface is formed, an axially facing surface which is provided on the third member, rolling elements which are interposed between both the axially facing surfaces, and a retainer which holds the rolling elements and which is restricted from rotating by the second member.

Abstract: A ball screw device includes a cylinder that surrounds the outer periphery of a ball nut. Accommodation holes are formed in the ball nut at a rolling start position and a rolling end position in ball rolling paths. An outer periphery turning groove is formed in an outer peripheral face of the ball nut, and the outer periphery turning groove and an inner peripheral face of the cylinder constitute a turning rolling path. The turning rolling path and connection passages formed in deflectors constitute a circulation path through which balls are returned from the rolling end position to the rolling start position.

Abstract: Provided is an electric power steering system that achieves a more appropriate steering feel. An ECU of the electric power steering system calculates a basic assist component and a target pinion angle based on at least steering torque. The ECU calculates a correction component for the basic assist component through feedback control in which an actual pinion angle is caused to match the target pinion angle. The ECU calculates an assist command value by adding the correction component to the basic assist component. The ECU corrects a hysteresis controlled variable and a viscosity component according to the rate of change (gradient) in a spring component with respect to a change in absolute value of the target pinion angle. Specifically, the ECU multiplies the hysteresis controlled variable and the viscosity component by gains that have a larger value as the rate of change in spring component increases.

Abstract: A pulley unit having a sleeve, a pulley and a cap member, wherein the cap member has an annular portion extending from a cover portion in an axial direction and fitted into a hexagon socket portion (polygonal inner peripheral portion), claw portions are formed to extend from the annular portion in the axial direction, and a peripheral surface of the annular portion is provided with first plane portions facing surfaces of the hexagon socket portion.

Abstract: A feed apparatus includes a base, a moving member that is movable in a predetermined axial direction with respect to the base, a first screw shaft provided on the base so as to be parallel to the axial direction, a second screw shaft provided separately from the first screw shaft on the base so as to be parallel to the predetermined axial direction, a first motor mounted on the base to rotate the first screw shaft, a second motor mounted on the base to rotate the second screw shaft, a first nut provided on the moving member and moving in the predetermined axial direction in conjunction with rotation of the first screw shaft, and a second nut provided on the moving member and moving in the predetermined axial direction in conjunction with rotation of the second screw shaft. The first nut and the second nut are disposed at different positions in the predetermined axial direction.