Specific mechanical feature

A steering gear system includes a rack driven by a pinion. When the torque on the pinion reaches a predetermined level, the steering column to which the pinion is attached moves axially. The axial movement of the steering column brings a disc connected with it into electrical conductive contact with...     

A steering gear for turning steerable wheels of a vehicle comprises a member movable in opposite directions. The member has first and second portions. The first portion comprises a rack having gear teeth extending transverse to the direction of movement of the member. A manually rotatable pinion engages...     

An electric power assisted steering mechanism for a automotive vehicle having a torque shaft interconnecting the vehicles steering wheel with the steering gear box. Electrical power is applied to the output end of the torque shaft by a low speed, high torque electrical motor through a low gear ratio...     

Power assist steering gear assembly for vehicle comprises an elongated member linearly movable in opposite directions for pivoting of dirigible wheels. The elongated member comprises a rack portion formed at a first axial position and engaged with a pinion connected to a steering shaft and a thread portion...     

A power steering system for vehicles is disclosed using an electric servomotor. The servomotor is energized for power assist in executing turns and for reducing the drag of the servomotor during the return of the dirigible wheels to the straight ahead position. A torque transducer operatively coupled...     

A vehicle power steering apparatus for performing power steering by rotating a motor in accordance with a steering torque acting on input and output steering shafts and driving a steering direction control unit to perform power steering, comprises a sensor for generating an electrical signal corresponding...     

A vehicle power steering apparatus for rotating a motor in response to a torque signal generated in response to a rotational torque of input and output steering shafts and for driving a steering direction control unit using a rotational force of said motor so as to perform power steering, comprising:...     

Power assist steering gear assembly for vehicle comprises a first unit including an elongated member linearly movable in opposite directions for pivoting of dirigible wheels. The elongated member comprises a rack portion engaged with a pinion connected to a steering shaft and a thread portion cooperating...     

In an electric power steering apparatus including an input shaft, an output shaft and an electric motor for imparting a steering torque to the output shaft, a torque sensor includes a torsion bar provided between the input shaft and the output shaft. A movable member converts the output of the torsion...     

An electric power assisted steering system for a automotive vehicle having a torque shaft connecting the vehicle's steering wheel with the vehicle's steering mechanism. Rotary power is applied to the output end of the torque shaft by a low speed, high torque electrical motor through a low gear ratio...     

A power steering apparatus for an automobile or other vehicle has a steering shaft constituted by an input section and an output section connected by a torsion bar. A mechanism for detecting when a driver is imparting torque to the steering wheel of the vehicle is constituted by a potentiometer having...     

An accurately operated automotive power steering system comprises a housing, an input shaft, an output shaft, an angular displacement producing mechanism for producing an angular displacement between the input and output shaft according to the torque applied to the input shaft, a sensor for delivering...     

An inventive electrical motor-assisted power-steering system is compact while still providing adequate steering assist force. The system can also act as a manual steering system in the event of failure of an electrical motor. The system includes a steering gear with a shaft rotated manually via a steering...     

An electromagnetic servo unit is constituted with an outer casing (1), a first shaft (4) and a second shaft (5) both rotatably supported by the casing, an electric motor (2) built in the casing coaxially with the second shaft, a torque detecting mechanism (4b, 29, 27, 41, 42, 34, 35) for detecting torque...     

An electromagnetic servo unit (100) including a first shaft (12), a second shaft (7), an elastic member (21) interposed between the first and second shafts (12, 7) to interconnect them in a torque transmittable manner, a torque detection mechanism (5) for detecting input torque acting on either of the...     

A power steering apparatus for an automobile or other vehicle has a motor which rotates a steering shaft through an electromagnetic clutch and a worm gear reduction gear. When the clutch is engaged, the rotation of the motor causes the rotation of the steering shaft. When the clutch is disengaged, the...     

A motor-driven power steering system in a motor vehicle having a body, a steering wheel, and steerable wheels. The power steering system includes a linkage mechanism including tie rods coupled to the steerable wheels and an arm coupled to the tie rods and operatively connecting the steering wheel and...     

A motor-driven power steering unit which can easily be added to an automobile. The motor-driven power steering unit includes a case fixed to the automobile body. A first shaft rotatably is supported in the case and has one end connected to a first lever for being operatively coupled to the steering wheel....     

An electric power steering apparatus comprises a steering shaft including a torsion bar to join an input shaft on the side of a steering wheel and an output shaft on the side of a steering road wheel so that they can be rotationally displaced relative to each other, and a non-contact type sensor using...     

A motor-driven power booster suitable for use in a motor-driven power steering system. The power booster comprises a casing, input and output shafts rotatably supported on the casing, a first motor for driving the output shaft, a second motor for driving the input shaft, an angle detector operatively...     

A power steering apparatus includes an electric motor having an output member which is drivingly connected with a planetary gear set. An output member of the planetary gear set rotates a ball nut. A member which is connected with a steering linkage has an external thread convolution which is engaged...     

The electric power assistance actuating mechanism comprises an input member (12) connected to a sun gear (14) of a planetary gear mechanism (20), with a sleeve member (55) slidably disposed about the input member (12) and keyed for rotation therewith. A carrier member (25) of the planetary gear mechanism...     

A torque detector is provided, which functions in such a manner that as torque is applied between an input shaft and an output shaft, an angular displacement is produced between the input shaft and the output shaft, this angular displacement is converted into an axial displacement by means of a torque-axial...     

A power steering system uses an electric motor to produce an auxiliary torque which is added to the torque applied to the steering wheel of vehicle by the driver. The system includes first detecting mechanism for detecting the rotating direction and rotating torque value applied to a steering shaft by...     

An electrically energized power steering system for vehicles is disclosed using a clutch that disengages the servomotor at times of near zero driver input torque. The servomotor is energized for power assist in executing turns and for synchronizing servomotor speed with the steering mechanism during...     

A motor-driven power steering device includes an electric motor for generating assistive torque which is applied through a ball screw mechanism to a steering gear mechanism to reduce manual steering forces applied by the driver to steer a motor vehicle. The motor-driven power steering device comprises...     

An electric power steering apparatus comprises a steering shaft 34, a detector 27 for detecting an operation of the power steering apparatus, an electric motor 3 driven in response to an output of the detector 27 for generating an assisting force for a steering operation, and a reduction gear 1 including...     

A power steering system uses an electric motor to produce an auxiliary torque which is added to the torque applied to the steering wheel of a vehicle by the driver. The system includes a couple mechanism for coupling the motor to the steering shaft. The system further includes a converting mechanism...     

The invention relates to a power-assisted vehicle steering gear wherein a rotor is mounted directly on the pitman shaft via a coupling. The rotor rotates in a housing inner bore under the influence of circulating magnetic attraction in such a way that it is enabled to supply a torque to the pitman shaft.

A steering system for vehicles in which the steered wheels may be restored to the neutral position in an automatic manner or at the discretion of the driver when necessary. The steering system includes a steered wheel, a steering mechanism for transmitting a steering operation of a steering wheel to...     

An electro-mechanical linear actuator particularly attractive for vehicle steering applications includes a case having a cover part rigidly attached to a housing part and an output rod supported on the case for linear shiftable movement along a primary axis of the case. An electric motor is mounted on...     

An automotive steering gear includes a transverse steering member and a steering shaft like the steering rack and pinion shaft, respectively, of a rack and pinion steering gear. The steering shaft is operatively connected to the steering member through a bi-directional Chinese Windlass which pulls the...     

An improved clutch for use with an electric power steering assembly is disclosed. The improved clutch has an outer member, and a cage mounted between the outer and inner members and formed with a plurality of pockets. The improved clutch further comprises a pair of rolling elements mounted in each pocket,...     

A torque detecting device, which is typically used for detecting a steering torque in a motor vehicle, includes a mechanism for converting the torque applied to an input shaft to an axial force between the input shaft and an output shaft. A slider is fitted about the output shaft movably axially along...     

A power steering apparatus in which a motor for assisting steering force is mounted in such a manner that it is positioned substantially in parallel to a rack shaft of a rack-pinion type steering mechanism, and a planetary roller reduction device and a bevel gear connected directly thereto are mounted...     

A device for detecting a load torque using angle detectors fitted with a certain spacing on a shaft which is rotated by a drive source and on the basis of a relative angular difference of angles detected by the angle detectors. The device includes two rotary drums or discs fitted with a certain spacing...     

A system for automatically turning a road wheel. The system utilizes a strut-type suspension including a cylinder connected at one end to a steering knuckle and a piston/piston rod assembly slidable within the cylinder. An actuator is mounted to a vehicle body and operatively connected to the piston...     

A power steering apparatus in which a housing to contain a torque sensor for sensing seering torque, a small-sized motor for assisting steering, and a driving device for transmitting driving force of the motor to the steering shaft is made small-sized and disposed on the middle part of the steering shaft...     

An electric power steering apparatus includes a torsion bar, input and output shafts, an electric motor, and a detecting mechanism. The input and output shafts are coupled to each other by the torsion bar so as to be pivotally displaced in relation to each other. The electric motor is coupled to the...     

A clutch having an outer member, an inner member mounted in the outer member, a cage interposed between the outer and inner members and cam elements movably mounted in pockets formed in the cage. Torque-setting elastic members are provided between the cage and one of the inner and outer members so that...     

An electric power steering apparatus is provided with a torque sensor for detecting manual torque input to a steering shaft of an automobile and an electric motor for generating auxiliary steering power so that a load current is applied to the electric motor in accordance with the level of manual torque...     

A system for automatically turning a road wheel. The system utilizes a strut-type suspension including a cylinder connected at one end to a steering knuckle and a piston/piston rod assembly slidable within the cylinder. An actuator is mounted to a vehicle body and operatively connected to the piston...     

An apparatus for steering a steerable wheel of a vehicle having a frame member. The apparatus comprises a housing pivotally connectable with the frame member of the vehicle. A rack member is connectable with the steerable wheel of the vehicle and has rack teeth formed thereon. The rack member is axially...     

A power-assisted steering system for an automotive vehicle has a steering shaft rotatably supported by a steering column, a steering wheel and an electric motor for assisting in rotating the steering shaft when the steering torque is too great. The electric motor has an output shaft offset from the steering...     

A power steering apparatus for power steering the steerable wheels of a vehicle is disclosed which includes a steering column having one end connected with a steering wheel and the other end operatively connected with the steerable wheels; a cylindrical housing surrounding the steering column and providing...     

An electric power steering system includes a steering torque detecting device for detecting a steering torque applied between an input shaft connected to a steering wheel and an output shaft connected to a steering gear in response to an elastic deformation of an elastic member connecting the input shaft...     

The present invention relates to a torque detecting apparatus provided with a conversion device, which is positioned on the axis of one of an input shaft and an output shaft extended on a same axis and mutually connected by a torsion bar and which serves to convert the relative rotational displacement...     

A power steering apparatus in which a motor for assisting steering force is mounted in such a manner that it is positioned substantially in parallel to a rack shaft of a rack-pinion type steering mechanism, and a planetary roller reduction device and a bevel gear connected directly thereto are mounted...     

A power steering apparatus provided with an electromagnetic clutch disposed between an output shaft of a steering assisting motor and a transmission shaft connected to a steering mechanism, an intermediate transmission shaft supported between the output shaft and transmission shaft and supporting an...     

In the representative embodiments described in the specification, a cup-shaped clutch drive member, driven by a drive pinion, rotates about an axially displaceable output shaft. Friction disks alternately coupled to the drive member and the shaft are pressed together to actuate the clutch. To apply actuating...     

An improvement to an electrically driven power steering apparatus which utilizes an electric motor is disclosed. A bevel gear of a greater diameter is mounted on a steering shaft so as to be axially displaceable thereon, and an urging mechanism is connected between the bevel gear and the steering shaft....     

A variable ratio steering system on a motor vehicle can vary the ratio of the angle through which the steerable road wheels are steered to the angle through which the steering wheel is turned by the driver. The variable ratio steering system includes an input shaft coupled to the steering wheel, a first...     

The present invention is a motor-driven servo steering system for a motor vehicle having an actuator for superimposing steering intervention on the steering wheel power applied by the driver. Power provided by a power supply, for example an electric motor, is superimposed on the steering wheel power...     

It is proposed in the case of an electromotive power steering as a steering aid for motor vehicles and similar, particularly for the speed range during parking (parking power steering), having a reduction gear between the servo-motor and the steering column or the drive leading on to the mechanical wheel...     

An electric power steering apparatus includes a gear wheel on a driven side having a gear portion on one side surface thereof on a steering shaft and a pinion to be laterally meshed with a gear portion of the gear wheel on a shaft capable of transmitting a rotational driving force from an electric motor....     

An automotive power steering gear has a pair of permanent magnet driving discs supported on a housing of the steering gear and continuously rotated in opposite directions corresponding to right and left turn rotation of an output shaft of the steering gear. A soft, magnetically permeable driving disc...     

This invention relates to an auxiliary power steering mechanism and in particular to one including an angle sensor for detecting an angle moved by a steering wheel, a direction controlling processor electrically connected with the angle sensor, a dc motor controlled by the angle sensor and the direction...     

The invention is related to an electromechanical power steering system (1) for vehicles whose servomotor (5) is positioned in the passenger compartment (2) in order to protect it from negative effects, such as mud, oil, fuel or similar which customarily exist in the engine compartment.

A power assisted steering mechanism for a vehicle, the mechanism including electrically powered drive means for driving the steering mechanism, the drive means including a drive shaft having an input shaft portion drivingly connected to an output shaft portion by resilient means such that rotation of...     

An electric power steering apparatus having a compact and inexpensive backlash mechanism is provided by arranging its structure to easily adjust the backlash of the bevel gear mechanism, and at the same time, to pre-press the bearings so that the movement of the shaft in the axial direction can be regulated....     

An electric power steering apparatus can maintain suitable backlash in a temperature changing atmosphere even if a gear consisting of a metallic cylindrical core portion and a toothed resin outer ring portion. The thickness of the resin outer ring portion is suitably determined by the coefficients of...     

An auxiliary power source, for example, an electric motor, supplies the power assist for a steering unit via a worm gear (15, 16). The worm gear (15, 16) drives clutch hubs (22 and 23) in the opposite rotational directions. The auxiliary power can be transferred to a driven shaft (3) via a common clamping...     

In order to provide an electric power steering system of small size whose output shaft has little play, a pressure member of the electric-driven power steering system compresses a duplex bearing, more specifically, presses two bearing components of the duplex bearing against each other. As a result,...     

A lock nut having a tapered portion at one end thereof is screwed halfway through an output shaft that transfers motion to a steering mechanism. A tapered fitting hole formed through an axis of a worm wheel is fitted onto an outer circumference of the tapered portion with a slip plate interposed therebetween....     

Provided is a variable ratio steering system for a vehicle which can maintain the relationship between the steering angle at the steering wheel and the behavior of the vehicle substantially constant without regard to the travelling speed of the vehicle. A rotational movement of a steering wheel is converted...     

An electrically operated steering apparatus for use on a motor vehicle has a cylindrical housing, an axially movable rack shaft disposed in the housing for steering steerable wheels coupled to the rack shaft, and an electric motor disposed in the cylindrical housing around the axially movable shaft for...     

An electrically operated power steering apparatus has a housing, a pinion rotatably supported in the housing, the pinion being adapted to be connected to a steering shaft, a rack shaft axially movably disposed in the housing and held in mesh with the pinion, an electric motor disposed coaxially around...     

An angular signalling device comprising a housing, a torque transmitting unit extending through the housing, first and second rotors fixed to respective first and second unit regions for rotation relative to the housing, an output member supported for movement with respect to the housing and the rotors,...     

A torque transducer has a circumferentially magnetized sleeve press fitted on the user-tiltable portion of a vehicle steering shaft and disposed axially intermediate the shaft support bearings. A stationary pickup coil is mounted over the sleeve and located with respect to the sleeve by a second pair...     

A servo-assisted rack-and-pinion steering system in which the rack is drive-coupled to a pinion which is mounted to move between two end positions in the longitudinal direction of the rack so that its movements control the servo motor. The end positions of the pinion are defined by two friction wheels...     

An electrically-operated power steering apparatus comprises a steering shaft, a rack shaft capable of linear movement for turning a steering running wheel a, rack-pinion gear for coupling the steering shaft with the rack shaft, and a ball screw mechanism including a screw groove formed on the rack shaft,...     

In an electric power steering apparatus including a steering torque detector for detecting steering torque of a steering system, an electric motor for generating steering auxiliary force with respect to the steering system, and a control apparatus for controlling the steering auxiliary force generated...     

In order to provide an electric power steering apparatus which can be made compact as well as reduced in cost and can be improved in reliability, a control circuit and a drive circuit are provided on a deformable flexible circuit substrate. The circuit substrate is provided on the housing of a reduction...     

An improved vehicle steering apparatus (10) includes an electric motor (28) which is continuously energized during operation of the vehicle. A pair of clutch assemblies (42 and 44) are connected with a steering shaft (48) which extends from the vehicle steering wheel (12) to steering gear (14) connected...     

In a motor operated power steering device, a drive shaft accommodation hole in a housing communicates with a opening for fitting a steering assistance power generation motor. In the accommodation hole, a drive shaft, which is driven by the motor, is supported by rolling bearings at two separate points...     

An electric power steering apparatus transmits an auxiliary torque from an electric motor to a steering system via a mechanical clutch composed of a plurality of sets of friction clutch mechanisms. At least one of the plural clutch mechanism sets is disengageable in advance to the remaining clutch mechanism...     

A shaft assist electric power steering apparatus including an electric motor and a speed reducer having an input planetary gear set and an output planetary gear set each concentric with a steering shaft. The input planetary gear set includes an input ring gear, an input sun gear, a stationary input planet...     

A rack-and-pinion steering system has a rack which is toothed on two sides and cooperates with two pinions. At least one of the pinions can be axially translated in dependence on forces acting between the rack and that pinion. This axial translation controls a clutch arrangement so that a servomotor...     

A torque is transmitted from a steering assistance motor to a steering shaft via a gear. The first rotation restraining element, which is radially deformed by being sandwiched between the outer circumference of the steering shaft and the inner circumference of the gear, exerts a radial force corresponding...     

A power steering apparatus having enhanced neutral rigidity and improved operation stability at the time of straight traveling. The apparatus includes a pair of spring members which sandwich an input shaft and are disposed in an output shaft or a member rotating integrally with this output shaft. A preset...     

An electric power steering unit has an armature shaft that is free from axial forces and hence may have less rigorous requirements for its strength so that it may be manufactured more efficiently at reduced cost. It comprises a rack-shaft 2 to be coupled to the guiding wheels of a vehicle, a housing...     

A steering apparatus for a motor vehicle including a steering column and an electric power assist apparatus. The steering column includes a mast jacket, a steering shaft rotatably supported on the mast jacket, and a steering hand wheel on the steering shaft. The electric power assist apparatus includes...     

In an electric power steering device of the type wherein an input member connected to an electric motor and an output shaft including an output member connected to a steering wheel are connected via a plurality of sets of friction clutch mechanisms for transmitting an auxiliary torque from the electric...     

An electric power steering unit includes a rack-shaft(2) to be coupled to the guiding wheels of a vehicle, a housing A for slidably containing the rack-shaft(2)and holding therein a coupling section(6)for causing the teeth of the rack-shaft(2)to engage those of a pinion arranged on the steering column(5)linked...     

An electric power steering apparatus comprises an input shaft transmitting a rotation from a steering wheel and an output shaft rotatably connected to the input shaft through a torsion bar relative to the input shaft. A drive motor is coaxially arranged relative to both of the input shaft and the output...     

A steering assembly (10) includes a housing (28, 60) and a member (14) which is movable axially in the housing to effect turning movement of steerable wheels of a vehicle. The member (14) has a rack portion (36) for engagement with a pinion (30) and an externally threaded screw portion (40). A ball nut...     

In a cable-type steering device (in which a steering torque of a steering wheel is transmitted to wheels through a driven pulley, cables, and a follower pulley, and is assisted by a motor for a power-steering operation), a rotational angle of the driven pulley and a rotational angle of the follower pulley...     

An electric power steering apparatus for applying an auxiliary torque generated in proportion to a steering torque, to a rack shaft to thereby reduce the steering torque. The rack shaft has at one end thereof rack teeth for meshing with a pinion. A rack guide mechanism is provided at the rack shaft one...     

A cable-type steering device with electric power-steering assist in which the structure of the steering torque transmitting system is simplified and the loss in transmission of the steering torque is decreased. An output shaft of a motor in an electric power-steering device is rotatably carried around...     

A vehicle steering system has an electronic control system for coupling a steering device and the steered wheels of the vehicle, with the steering angle setpoint signal passing though a filter before a setpoint/actual value comparison is made. The filter passes essentially only those frequencies below...     

In an electric steering actuator comprising an electric motor having a hollow output shaft, a steering shaft passed through the hollow center of the output shaft of the electric motor, and a ball-screw mechanism provided between the output shaft and the steering shaft for converting the rotary movement...     

In an electric power steering device, a rotary element screwed on a rack engaged with a pinion, which is rotated by steering operation, is driven by a motor. A vehicle is steered by longitudinal shifting of the rack due to rotation of the pinion. By rotation of the rotary element, a steering assistance...     

An electric power steering unit comprises a rack-shaft 2 to be coupled to the guiding wheels of a vehicle, a housing A for slidably containing the rack-shaft 2 and holding therein a coupling section 6 for causing the teeth of the rack-shaft 2 to engage those of a pinion arranged on the steering column...     

In an electric steering actuator comprising an electric motor having a hollow output shaft, a steering shaft passed through the hollow center of the output shaft of the electric motor, and a ball-screw mechanism provided between the output shaft and the steering shaft for converting the rotary movement...     

A cable-type steering device having a steering wheel 1, a gear box and Bowden wires connecting the steering wheel 1 and the gear box. Pins fixed to a tip end of inner cables of the Bowden wires are fixed to pin holes formed on end surfaces of a drive pulley. The inner cables connected to the pins are...     

To facilitate the assembly of wires for connecting a steering wheel and a gear box to each other, and to facilitate the regulation of neutral positions of the steering wheel and the gear box, first Bowden wires connected at one end to a steering wheel and second Bowden wires connected at one end to a...     

An electric power steering apparatus which includes: an input shaft connected to a steering wheel; a torque sensor mechanism having a torque sensor which detects a steering torque on the basis of a relative displacement of the input shaft and the output shaft connected to the input shaft via a torsion...     

An assembly for turning steerable wheels of a vehicle upon manual rotation of a steering wheel (12) includes a steering member (14) which is axially movable to effect turning movement of the steerable vehicle wheels. A housing surrounds at least a portion of the steering member (14). A ball nut drive...     

In a vehicle power steering device, a motor is turned on to rotate in one direction whether a steering wheel is turned clockwise or counterclockwise. A switching mechanism is interposed between a motor armature shaft and an output shaft to change directions of the output shaft rotation relative to the...     

An electric power steering apparatus having a rack shaft supported at opposite end portions thereof by a rack-and-pinion mechanism and a ball-screw mechanism, respectively, includes a plain bearing slidably fitted around a rack shaft to support an intermediate portion of the rack shaft. The plain bearing...