Abstract: A drive unit for providing drive from a robot arm to an instrument, the drive unit comprising: a plurality of drive elements for engaging corresponding elements of the instrument, each drive element being movable along a drive axis and the drive axes of each of the drive elements being substantially parallel to each other; and a load cell structure comprising a plurality of deflectable bodies coupled to the drive elements for sensing load on the drive elements parallel to their drive axes, and a frame comprising an integral member supporting the deflectable bodies in such a way as to isolate each deflectable body from load applied to the or each other deflectable body.

Abstract: A power steering system for a motor vehicle may include a servomotor, which drives an axially-movable rack via a ball nut. The ball nut may be mounted in a bearing such that the ball nut can be rotated in a housing. The ball nut engages with a threaded spindle formed on the axially-movable rack and has a ball screw thread on an inside thereof for balls to roll on. An external ball return means may connect a beginning of the ball screw thread to an end of the ball screw thread to allow endless circulation of the balls. A deflector and a sleeve may form a return channel of the ball return means.

Abstract: An electronic parking lock actuator includes a driving motor and a gearbox coupled to the driving motor. The gearbox includes a casing which comprises a base and a cover mounted on the base, a gear housed in the casing and engaged with the driving motor for outputting a driving force generated by the driving motor, and a controller fixed in the casing. The base includes a bottom plate, and a plurality of peripheral walls extending upward from edges of the bottom plate. The bottom plate defines at one or more cavities. The controller includes a printed circuit board and a plurality of electronic components disposed on a side of the printed circuit board facing the bottom plate. The electronic components are accommodated in the cavities.

Abstract: In an electric driving apparatus, a sensor magnet is fixed to a first end portion of a rotary shaft of a motor. A sensor device includes a rotation sensor that detects a magnetic field generated by the sensor magnet. The rotation sensor opposes the sensor magnet in an axial direction of the rotary shaft. A control unit mounted on the motor includes an inverter circuit that is connected to an armature winding of the motor via a plurality of feeder wires. The inverter circuit is disposed in a position further from the sensor magnet than the rotation sensor in the axial direction of the rotary shaft. A shield plate formed from a magnetic material is disposed between the rotation sensor and the inverter circuit.

Abstract: Provided is a geared motor with which a large torque can be obtained without an increase in size. In this geared motor (1), an output member (8) having a helical groove (83) formed in an outer circumferential section is provided between a first plate part (31) and a second plate part (32) of a frame (3), and the rotation of a motor pinion (55) fixed to a rotary shaft (50) is reduced in speed by transmission gears of a reduction gear mechanism (9) and is transmitted to a gear part (85) of the output member (8). Thus, a large torque can be output, even when the gear part (85) of the output member (8) is made smaller than the outer diameter of the section (84) provided with the helical groove (83). Also, even when a gear cover (7) is provided, a lateral plate part (72) of the gear cover (7) covering the outer circumferential section of the gear part (85) of the output member (8) is located close to the rotation center axis of the output member (8).

Abstract: Embodiments of cooling a motor controlling using a motor are disclosed. In some embodiments, a system includes an electric motor including at least one rotor with integrated features positioned and configured to pull air into and through the electric motor. The system also includes at least one motor controller each comprising a heat sink positioned in an air intake path from a source of air to the electric motor. A method of manufacturing the system includes arranging at least one motor controller and at least one electric motor, coupling the at least one motor controller and at least one electric motor via a flexible duct, and adapting the arrangement of the at least one motor controller and the at least one electric motor to passively provide cooling via airflow through the at least one motor controller and at least one electric motor in proportion to a load on the at least one electric motor.

Abstract: An assembly method in which an assembly ring is force-fitted between a first part and a second part such as to create: a tightening contact between the first part and the inner face of the ring, by means of plastic deformation of the ring, said tightening contact occupying a first interference zone; and a tightening contact between the second part and the outer face of the ring, said tightening contact occupying a second interference zone. The assembly ring comprises a first ring segment (T1) and a second ring segment (T2) which are stepped axially in relation to one another and which have different radial dimensions from one another, such as to confine the first interference zone to the first ring segment (T1) and the second interference zone to the second ring segment (T2), in order to prevent the first interference zone and the second interference zone from overlapping axially.

Abstract: A mounting structure of a resolver of a motor is disclosed. The mounting structure of a resolver of a motor may fix the resolver including a resolver stator and a resolver rotor to a cover of a housing accommodating the motor. The mounting structure may include a resolver cover that is coupled to an edge portion of the resolver stator and press-fitted to a supporting end formed at an inner surface of the cover. In particular, the resolver cover forms a mounting space for mounting a component inside the cover.

Abstract: According to one exemplary embodiment of the present invention an eccentric adjuster assembly is provided. The eccentric adjuster assembly includes a housing, an eccentric adjuster, an axial retainer, and an eccentric adjuster retainer configured to retain the eccentric adjuster relative to the housing, the eccentric adjuster having an eccentric adjuster radial position and an eccentric adjuster axial position. The eccentric adjuster retainer includes a retainer body having an inner perimeter with a cavity disposed therein and an outer perimeter, the eccentric adjuster extending through the cavity and at least a portion of the outer perimeter engaging the housing to retain the eccentric adjuster radial position relative to the housing.

Abstract: The present disclosure relates to systems and methods for using transparent surfaces at an automated teller machine. In one implementation, a method of visualizing a deposit at an automated teller machine includes receiving a command to deposit at least one depository element; determining an amount associated with the command; displaying, on a transparent surface of the automated teller machine configured to allow a user of the automated teller machine to view the at least one depository element, a visual representation of the determined amount; and receiving, concurrent with or after displaying, a verification of the amount.

Abstract: A gearbox assembly for an electric power assisted steering apparatus. The assembly comprises a gearbox housing which houses a worm shaft and a gear wheel, the worm shaft being supported relative to the housing by a main bearing assembly at an end closest to the motor and by a tail bearing assembly, at an end furthest from the motor, comprising an inner race and an outer race separated by bearing elements. The gearbox assembly further comprises a first guiding surface upon which the outer race is supported, the outer race being able to move by rolling along the guiding surface when a radial load is applied to the tail bearing assembly by the worm shaft, and a guide device which contacts both the outer bearing and a second guiding surface, the biasing spring acting upon the tail bearing assembly indirectly by acting upon the guide device which in turn acts upon the bearing assembly. The gear wheel i supported by an output shaft having at least one end that provides a take-off from the gearbox assembly.

Abstract: The present application discloses a steering assistance device, including: a motor configured to output a drive force in accordance with a steering force applied to a steering shaft; and a speed reducer including: a gear section configured to rotate and oscillate in accordance with the drive force; an outer cylinder having an internally toothed ring formed thereon, the internally toothed ring being configured to mesh with the gear section; and a carrier configured to rotate in accordance with rotation and oscillation of the gear section and output a steering assistance force to a steering mechanism, the steering mechanism being configured to steer vehicle wheels in accordance with rotational operation applied to a steering wheel. The engagement ratio between the gear section and the internally toothed ring is from 25 to 100%.

Abstract: A redundant gear assembly for a vehicle steering column includes a gear operatively coupled to a steering column component. Also included is a first and second set of gear teeth on the gear. Yet further included is a first motor driving a first gear input component, the first gear input component in meshed engagement with the first set of gear teeth to provide a first steering assist torque that is representative of a desired steering assist torque in a primary operating mode of the redundant gear assembly. Also included is a second motor driving a second gear input component, the second gear input component in meshed engagement with the second set of gear teeth to provide a second steering assist torque in a redundant operating mode of the redundant gear assembly, the second motor not driving the second gear input component in the primary operating mode.

Abstract: A power steering assembly includes a steering unit and a motor. A controller includes a processor and tangible, non-transitory memory on which is recorded instructions for executing a method of self-diagnosis for the assembly. If a plurality of enabling conditions is met, the steering unit is caused to rotate through a plurality of angles from an original position, via a command to the motor. The steering unit is caused to rotate first in a forward direction up to a predefined maximum angle, second in a reverse direction up to a negative of the predefined maximum angle and third in the forward direction back to the original position. The controller is configured to obtain motor torque data characterizing torque of the motor at the plurality of angles. The assembly is controlled based at least partially on the motor torque data and predetermined baseline data.

Abstract: A utility vehicle steering system includes a steering gear for transmitting a manual torque from a steering wheel to a steering drop arm. An electric motor provides an auxiliary torque for the steering boost, which is provided exclusively electrically over the entire operating range of the steering system. An input shaft and an output shaft have axes of rotation that are skewed with respect to each other. A first gear device couples the input shaft to the output shaft. A second gear device has the electric motor connected to the input side and has at least one speed-reduction gear stage in the form of a coaxial gear with a high transmission ratio. The output side of the second gear device is coupled to the output shaft and its speed reduction gear stage, a coaxial gear with a high transmission ratio, is coaxial with the output shaft.

Abstract: A drive device of an electric power steering apparatus includes a motor housing fixed to a gear housing, a stator, which is received in an inside of the motor housing, a rotor, which is rotatably placed on an inner side of the stator, and a shaft, which is rotated integrally with the rotor. The motor housing includes an engaging portion. The engaging portion has a thread, which is coaxial with a rotational axis of the shaft and is threadably engaged with the gear housing.

Abstract: A control device controls an operation of an electric motor, which is rotated by an electric power supplied from a battery. The control device includes an inverter, a controller and a booster. The inverter includes switching elements. The inverter converts an electric power supplied from the battery and supplies the converted electric power to the motor. The controller is operated by the electric power, which is supplied from the battery, to control the operation of the inverter. The booster boosts the voltage, which is inputted from the battery, and the booster outputs the boosted voltage to the controller. In a case where the voltage of the electric power supplied from the battery to the controller is dropped, the electric power, which has the voltage boosted by the booster, can be inputted to the controller.

Abstract: There is provided a torque transmission joint configured to transmit torque between end portions of a driving shaft and a driven shaft arranged in series in an axial direction. An outer-diameter-side concave-convex portion is formed on an inner periphery of one shaft of the driving shaft and the driven shaft or a member fixed to the one shaft, an inner-diameter-side concave-convex portion is formed on an outer periphery of the other shaft or a member fixed to the other shaft, and the outer-diameter-side concave-convex portion and the inner-diameter-side concave-convex portion are engaged with a circumferential gap being interposed therebetween. An elastic member is provided between the end portion of the driving shaft and the end portion of the driven shaft either directly or via another member such that torque can be transmitted between the driving shaft and the driven shaft.

Abstract: The present invention is related to a reducer of an electric power steering apparatus. An embodiment of the present invention provides a reducer of an electric power steering device. The reducer includes: a worm shaft having a worm formed thereon; a worm wheel having a worm gear formed thereon to be engaged with the worm; and a clearance compensation device coupled to a worm shaft bearing provided on an end of the worm shaft and configured to elastically support the end of the worm shaft within a reducer housing.

Abstract: Technical solutions are described for facilitating a steering system to determine a motor velocity estimate for a motor of the steering system. For example, the steering system may include a state observer module that computes a base motor velocity estimate of the motor based on a plant model of the steering system. The steering system may further include a delay compensation module that computes a delay compensated velocity estimate based on the base motor velocity estimate and an acceleration of the motor. The steering system may further include a standstill detection module that modifies the delay compensated velocity estimate in response to a handwheel of the steering system being in standstill mode.

Abstract: A pulley assembly for a road wheel actuator assembly includes a driven pulley assembly, a driven pulley, and a belt. The driven pulley assembly includes a driven pulley and a retainer. The driven pulley is at least partially disposed about a ball nut that is operatively connected to a rack bar. The retainer is received within the driven pulley. The belt is arranged to connect the driven pulley assembly to the drive pulley.

Abstract: A left steering ECU includes switching control unit that switches control mode between a first control mode and a second control mode. The first control mode is mode in which the left steering ECU controls left steering motor so that the steered angle of a left steered wheel becomes equal to a left target steered angle received from a higher-level control device. The second control mode is a mode in which the left steering ECU controls the left steering motor by torque feedback control so that the steered angle of the left steered wheel becomes equal to an angle corresponding to a neutral position of the left steered wheel. The switching control unit normally sets the control mode to the first control mode. The switching control unit switches the control mode to the second control mode if abnormal communication occurs between the higher-level control device and the left steering ECU.

Abstract: Provided is a vehicle steering apparatus capable of predicting failure while protecting a clutch device. The vehicle steering apparatus includes a turning device for turning steered wheels of a vehicle, and a steering device having a steering reaction force actuator for providing reaction force to assist user's steering of a steering wheel. A clutch device is provided between the steering device and the turning device to perform operation to mechanically cause a connection state or a disconnection state between the steering device and the turning device. Further, between the steering reaction force actuator and the clutch device, a mechanical fuse is arranged that twists and deforms by an input of an excessive load to prevent the load from being transmitted to the clutch device. A scribing line is drawn on the side surface portion of this mechanical fuse.

Abstract: An electric power steering system includes a system housing, an electric motor, a steering shaft assembly, and an electronic control unit. The electric motor is disposed within a motor housing that is disposed within and is attached to the system housing. The steering shaft assembly has a torsion bar that that extends at least partially through the system housing and motor housing. The electronic control unit a printed circuit board and a torque sensor. The printed circuit board is disposed within and is attached to the system housing. The torque sensor is disposed on the printed circuit board and is arranged to provide a signal indicative of angular displacement of the torsion bar.

Abstract: A steering wheel actuation device for retrofit mounting to a steering wheel of a motor vehicle and for applying a motor-driven torque to same includes a stator suitable for bracing against rotational movement and a rotor having attachment devices for the torque-proof attachment to the steering wheel, wherein said rotor is rotatable against the stator and wherein the stator features a U-shaped design, which extends over a curved section and forms an open section.

Abstract: A shunt resistor, at least a part of which has a resistive element with pre-set resistivity, is configured to bridge between two electrodes and detect a current value of a current flowing between the electrodes by detecting a voltage drop in the resistive element. The shunt resistor includes two connecting parts affixed to the electrodes via a conductive adhesive, respectively, and the connecting parts electrically connected to the affixed electrodes, a bridging part bridging between the connecting parts by being extended from one of the connecting parts to the other one of the connecting parts, and two bonding wires used to detect a voltage drop in the resistive element. The two bonding wires are extracted parallel to an extension direction of the bridging part to a same direction.

Abstract: A ball screw mechanism that allows a reduction in contact and friction between a retainer and a nut is provided. In a ball screw mechanism, a nut is threadedly engaged with a screw groove of a rack shaft through balls retained in a retainer groove of a retainer, and an axial force is applied to the rack shaft in accordance with rotation of the nut. The nut includes a uniform diameter portion having a uniform inside diameter and enlarged diameter portions each having an inside diameter larger than that of the uniform diameter portion. The enlarged diameter portions are provided at opposite axial ends of a region on an inner circumferential surface of the nut. The region faces the retainer groove and retainer ends adjoining to opposite axial ends of the retainer groove.

Abstract: There is provided a steering apparatus including a fixing mechanism for fixing a driven pulley and a rolling nut to each other, the fixing mechanism configured to suppress at least one of deformation of external teeth of the driven pulley and an increase in size of a housing surrounding the driven pulley. A steering apparatus includes: a steered shaft; a ball screw mechanism including a rolling screw portion, a rolling nut, and rolling elements; a motor; a belt transmission mechanism including a drive pulley, a driven pulley, and a toothed belt; and a fixing mechanism. The fixing mechanism includes an internal thread, a cutout section, and a locknut. The cutout section is provided at a position offset, in the axial direction, from a range of second external teeth in the axial direction, and the locknut includes a locknut body, a locking lug, and a remaining portion.

Abstract: A bearing assembly for bearing a steering shaft includes a bearing housing, a bearing, and a damping disk. The housing has two housing sections. The bearing is integrated into the damping disk. The damping disk is positioned so that an inner wall of a first housing section radially supports a circumferential side of the damping disk, and such that a second housing section is axially supported by the damping disk.

Abstract: An apparatus for compensating a steering angle signal and motor angle signal of an MDPS system may include: a motor torque compensator configured to compensate for mechanical deformation; an angular speed compensator configured to compensate for a difference between a steering angle and a motor angle; a sensor characteristic compensator configured to compensate for a steering position error of the steering angle sensor; and a hysteresis compensator configured to compensate for a hysteresis characteristic of the MDPS system.

Abstract: The present invention provides a rack assist type electric power steering apparatus. The power steering apparatus includes: a ball nut coupled to a rack bar via balls to be rotated, and configured to cause the rack bar to slide; a bearing mounted on an outer peripheral surface of the ball nut so as to support rotation of the ball nut; and a support member coupled to at least one of a space between one side of an outer race of the bearing and a housing and a space between the other side of the outer race of the bearing and the housing so as to support the bearing.

Abstract: A drive apparatus includes a housing, an electric motor arranged in the housing, and a worm gear mechanism arranged in the housing. The worm gear mechanism includes a worm gear arranged on a rotor shaft of the electric motor and a gearwheel in engagement with the worm gear and fixedly connected to an output shaft so as to rotate with the output shaft. The electric motor is axially mounted in the housing with one axial end via a stop element and with the opposite axial end via an axial clamping element. The axial clamping element has a spring element, a separate floating holding element, and a separate elastomer element. The holding element is arranged axially between the spring element and the elastomer element.

Abstract: The present invention concerns a method for determining the position of a movable steering member (1, 2, 3) belonging to a steering mechanism (4) of a vehicle that comprises at least a first movable member (1), such as a shaft (1) of an assistance motor (M), and a second movable member (2), such as a rack (2), which cooperate with each other by means of at least one first link (L1), said method comprising a step (a) that involves measuring the position (?1) of the first member (1), then a step (b) that involves calculating the instantaneous position (?2) of the second member (2) from said position of the first member (?1), and a correction step (d) during which the calculation of the position (?2) of the second member (2) is adapted, taking into consideration the offset (???) in the position of the second member (2) that results from the elastic deformation of the first link (L1) under the force (C1) transmitted by the latter.

Abstract: A torque detection device including a multipolar ring-shaped magnet fixed to a first shaft, a yoke holder configured to be fixed to a second shaft coaxially linked to the first shaft via a torsion bar and have a cylindrical portion surrounding the magnet, a pair of magnetic yokes each having a plurality of claw portions opposing the magnet and are fixed to the yoke holder, and a sensor part that detects a difference in rotational phase between the first shaft and the second shaft, wherein the pair of magnetic yokes are each provided with a plurality of swaging pieces swaged on the cylindrical portion, the swaging piece disposed at a position that overlaps in a radial direction of the cylindrical portion a specific claw portion selected from the plurality of claw portions and being formed so as to have a smaller width than a width of the claw portion.

Abstract: A mold for insert molding, which houses an electronic unit including a first circuit portion and a second circuit portion protruding from the first circuit portion, is prepared. The mold includes an upper wall surface facing an upper surface of the second circuit portion and side wall surfaces facing side surfaces of the second circuit portion. The flow resistance of a resin flowing through a space between each side surface of the second circuit portion and the corresponding side wall surface is lower than that of the resin flowing through a space between the upper surface of the second circuit portion and the upper wall surface. Then, the electronic unit is placed in the mold. Then, the resin is injected into the mold in which the electronic unit has been placed. Thus, the electronic unit and the housing in which the electronic unit is housed are integrated with each other.

Abstract: An electric power steering system includes a rack housing configured to accommodate a rack shaft, a pinion shaft meshed with the rack shaft, a speed-reducer including a worm wheel connected to a portion of the second pinion shaft protruding from the rack housing, a speed-reducer housing configured to accommodate the speed-reducer, and a seal member having an annular shape. The seal member is disposed closer to the second pinion gear than the worm wheel is, in the speed-reducer housing. The sear member seals a clearance between the second pinion shaft and the speed-reducer housing.

Abstract: According to one exemplary embodiment of the present invention an eccentric adjuster assembly is provided. The eccentric adjuster assembly includes a housing, an eccentric adjuster, an axial retainer, and an eccentric adjuster retainer configured to retain the eccentric adjuster relative to the housing, the eccentric adjuster having an eccentric adjuster radial position and an eccentric adjuster axial position. The eccentric adjuster retainer includes a retainer body having an inner perimeter with a cavity disposed therein and an outer perimeter, the eccentric adjuster extending through the cavity and at least a portion of the outer perimeter engaging the housing to retain the eccentric adjuster radial position relative to the housing.

Abstract: A system and method for determining whether a driver is holding a vehicle steering wheel. The vehicle will include an electric power steering system and may further include autonomous or semi-autonomous driving features, such as Lane Centering Control or Lane Keeping Assist. The system includes a passive detection technique which monitors steering torque and steering angle, determines a resonant frequency of oscillation of the steering system from the measured data, and compares the resonant frequency to a known steering system natural frequency to make a hands-on/off determination. If the passive technique results are below a confidence threshold, then an active technique is employed which provides a steering angle perturbation and measures the frequency response, where the perturbation signal has characteristics which are prescribed based on the results of the passive technique. A steering torque greater than a threshold value is also an indication of the driver holding the steering wheel.

Abstract: A stator may include a stator yoke including one or more yoke portions extending along a circumferential direction of the stator yoke; and a cover configured of resin. The stator yoke may include: a contact part at which an end surface of one yoke portion among the one or more yoke portions in the circumferential direction contacts the other end surface of the one yoke portion in the circumferential direction; a first groove extending along an axial direction of the stator yoke in a vicinity of the contact part; and a second groove extending along the axial direction and disposed at a position spaced father away from the contact part than the first groove. The cover may include a filling that fills the first groove, and the second groove may be hollow.

Abstract: A ratio of the distance by which a rack shaft moves in a first direction relative to the angle by which a pinion shaft rotates in a circumferential direction is defined as a stroke ratio. The stroke ratio is larger when the pinion meshes with one of a third rack and a fifth rack than when the pinion meshes with a first rack. The stroke ratio changes while the pinion moves on one of a second rack and a fourth rack. A clearance defined between a rack guide and a guide plug is smaller when the pinion meshes with one of the third rack and the fifth rack than when the pinion meshes with the first rack. The clearance defined between the rack guide and the guide plug changes while the pinion moves on one of the second rack and the fourth rack.

Abstract: A steering controller can control steering of a vehicle and is suitable for precision farm controlling. The steering controller can rotate the steering shaft of the vehicle direct the vehicle on a desired path, for example, using a satellite positioning system. Components of the steering controller are environmental protected by a housing that has an opening extending between its front and rear surfaces. The opening is lined by a shaft. A hub located near the front of the opening can be coupled to the steering shaft of the vehicle. A motor has a stator fixed to the housing and a rotor fixed to the hub. When the housing is attached to a fixed location on the vehicle, the motor can rotate the steering shaft by rotating the hub with respect to the housing. A control module drives the motor based on commands from a guidance module.

Abstract: The steering apparatus includes a first seal member and a second seal member. The first seal member is fixed to one of an outer peripheral surface of a rack shaft and an inner peripheral surface of a housing. The first seal member slidably contacts with a cylindrical surface which is centered on the axis and is provided on the other of the outer peripheral surface of the rack shaft and the inner peripheral surface of the housing. The second seal member is fixed to the other of the outer peripheral surface and the inner peripheral surface. The second seal member slidably contacts with a cylindrical surface which is centered on the axis and is provided on the one of the outer peripheral surface of the rack shaft and the inner peripheral surface of the housing.

Abstract: A rotary positioning system configured to provide absolute referencing is provided. The rotary positioning system includes an encoder mounted on a motor shaft of a motor and configured to generate an index pulse corresponding to a complete rotation of the motor shaft. The rotary positioning system also includes a speed reducer coupled to the motor shaft and configured to reduce a rotary motion of the motor by a pre-defined ratio and an output drive shaft coupled to the speed reducer and configured to transfer the reduced rotary motion to a load. The rotary positioning system further includes a sensor mounted on the output drive shaft of the speed reducer and configured to determine an absolute orientation of the output drive shaft and a controller coupled to the sensor and configured to generate a correlation function of the absolute orientation and the index pulse count.

Abstract: A failure detection mechanism for an electric actuator and/or an electric actuator includes: a first gear mechanism connected to a first motor; a second gear mechanism connected to a second motor; an output section capable of rotating at a speed produced by adding together a rotation speed based on the first gear mechanism and a rotation speed based on the second gear mechanism; a first sensor configured to sense a value of electric current driving the first motor or a value associated with the value of the electric current; a second sensor configured to sense a value of electric current driving the second motor or a value associated with the value of the electric current; and a comparison unit configured to determine a failure based on a result of comparison between a first sensing value from the first sensor and a second sensing value from the second sensor.

Abstract: A power steering device includes a worm shaft configured to rotate as an electric motor is driven; a worm wheel meshed with the worm shaft, the worm wheel being configured to transmit a rotational force of the electric motor to a rack shaft configured to turn wheels; a bearing that rotatably supports a tip side of the worm shaft; a gear case that houses the worm shaft; a biasing member configured to bias the worm shaft toward the worm wheel via the bearing; and a holder including a housing hole configured to house the bearing movably in a biasing direction of the biasing member. The holder includes a plurality of bulging parts formed to bulge radially outwardly, the bulging parts being configured to come into contact with an inner peripheral surface of the gear case.

Abstract: The present invention provides a rack assist type electric power steering apparatus that may include: a ball nut configured to be coupled to the outer circumferential side of a rack bar through balls that are coupled to a screw thread formed on the inner circumferential surface; a nut pulley configured to be coupled to the outer circumferential surface of the central portion of the ball nut in the axial direction; and a rotational support member configured to be coupled between the outer circumferential surface of the ball nut and the rack housing while supporting both side ends of the nut pulley.

Abstract: A recessed portion is formed in an inner wall surface of a lower portion of a reduction gear housing (a lower wall in FIG. 2) in the direction of gravity and between a bearing 44 and an outer wall of the reduction gear housing (a right side wall in FIG. 2). The recessed portion is formed to have such a depth that the recessed portion does not penetrate the reduction gear housing. The recessed portion is formed in the reduction gear housing within a given range in a circumferential direction with respect to the axis of a rack shaft serving as the center. A moisture sensor is mounted in the recessed portion to detect water infiltrating into a housing. The moisture sensor has a transmission circuit that operates using a water battery as a power supply source. The water battery generates power when water flows into the water battery.

Abstract: A cylindrical buckling prevention member is fitted on a spring shaft portion of a torsion bar, and an outer peripheral surface of the buckling prevention member is positioned close to or in contact with an inner peripheral surface of a hollow output shaft. Accordingly, when one of a pair of coupling shaft portions, which are axially end portions of the torsion bar, to be coupled to a coupling hole of a counter-shaft later is press-fitted into the coupling hole of the counter-shaft, the spring shaft portion of the torsion bar can be prevented from buckling.

Abstract: A one-way clutch allows unlocking torque input to a movable retainer to be made low, thereby enabling downsizing of an external apparatus that inputs unlocking torque to the movable retainer. The one-way clutch includes an inner ring, an outer ring, first rollers used to transmit torque between the inner ring and the outer ring provided in an annular space between the inner ring and the outer ring, and fixed retaining portions of a fixed retainer and a movable retaining portions of a movable retainer that are arranged alternately. The one-way clutch also includes second rollers provided between the movable retaining portions and the first rollers adapted to transmit unlocking torque from the movable retaining portions to the first rollers and the inner ring as the movable retaining portions move in a clockwise direction.

Abstract: An apparatus for applying an auxiliary force in a motor vehicle steering unit may include a driving worm that is connectable to an electric motor and applies an auxiliary force on the motor vehicle steering unit through a worm wheel. The driving worm may be housed in a roller bearing. The roller bearing can be pivoted about a pivoting axis defined by a pivot element outside the roller bearing.