Abstract: A steering column device includes a first tube on an inner side and a second tube on an outer side which are fitted into each other so as to be relatively slidable in an axial direction, and rotatably support a steering shaft. A plurality of projections that come into contact with the inner periphery of the second tube and extend in the axial direction of the first tube are provided on the outer periphery of the first tube. The plurality of projections are disposed at unequal intervals in a peripheral direction of the first tube so as to come close to the vertical plane which includes a central axis line of the first tube.

Abstract: A steering column device is provided with a pair of suspension shafts which connects a first plate of a fixed bracket and a second plate of a movable bracket, thereby suspending a movable jacket through the movable bracket. A pair of first holes, each of which is an elongated hole, into which the pair of suspension shafts is inserted, is formed in the first plate. A connection and separation mechanism which separates, at the time of a secondary collision, the second plate from a predetermined position of the first plate in a column movement direction includes a resin pin disposed only between the pair of first holes in relation to a direction orthogonal to the column movement direction.

Abstract: A steering column device is provided with a suspension mechanism which is supported on a fixed bracket, suspends a movable jacket through a movable bracket, and can move in a column movement direction at the time of a secondary collision. The suspension mechanism includes a suspension bolt which is inserted into a first plate of the fixed bracket and a second plate of a tilt bracket and is screwed into a nut. A leaf spring which is interposed between a head portion of the suspension bolt and the second plate in a state of bringing a stepped portion of the suspension bolt into contact with the second plate biases the first plate to the second plate side. Further, the second plate is pinched between the stepped portion and the nut.

Abstract: In a steering system, a first through-hole is formed in a stationary bracket secured to vehicle body. A second through-hole is formed in a movable bracket that is movable relative to the stationary bracket in a prescribed direction at the time of a secondary collision. A pin passed through both the first through-hole and the second through-hole breaks at a position between the first through-hole and the second through-hole at the time of the secondary collision, thereby allowing the movable bracket to move relative to the stationary bracket. An under plate attached to the movable bracket closes the second through-hole from below.

Abstract: In a steering system, a first through-hole is formed in a stationary bracket secured to vehicle body. A second through-hole is formed in a movable bracket that is movable relative to the stationary bracket in a prescribed direction at the time of a secondary collision. A pin passed through both the first through-hole and the second through-hole breaks at a position between the first through-hole and the second through-hole at the time of the secondary collision, thereby allowing the movable bracket to move relative to the stationary bracket. An under plate attached to the movable bracket closes the second through-hole from below.

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: An electric power steering apparatus comprises a driving gear driven by an electric motor for steering assist and a driven gear meshed with the driving gear. A steering shaft is rotated along with the driven gear. The steering shaft is rotatably supported by a first bearing and a second bearing. An urging member is arranged in a recess provided in a housing. The urging member urges at least one of the first bearing and the second bearing in a direction in which a center-to-center distance between the driving gear and the driven gear increases.

Abstract: An electric power steering apparatus comprises a transmission mechanism for transmitting driving force of a steering assisting electric motor to a steering mechanism. A driven gear of the transmission mechanism is rotatably supported by first and second bearings. One of the first and second bearings includes an inner ring coupled so as to be rotatable together with an output shaft of a steering shaft, an outer ring held on a housing, and a rolling element interposed between the inner ring and the outer ring. One of the inner ring and the outer ring includes an annular elastic plate giving a preload to the rolling element.

Abstract: An electric power steering apparatus includes a worm interlockedly connected to an output shaft of an electric motor, a first and a second bearing each supporting the respective side of the worm in a housing, and a gear wheel meshed with the worm. The housing includes a fitting bore in which the first bearing supporting a side of the worm closer to the electric motor is to be fitted, and an annular retaining portion located at a position corresponding to the second bearing and eccentrically oriented with respect to the center (axial center) of the fitting bore in a direction that shortens a distance L between the center of rotation of the worm and that of the gear wheel, and the annular retaining portion retains a coil spring around an outer circumference of the second bearing.

Abstract: A steering shock absorbing apparatus for motor vehicle according to the invention comprises a first universal joint for interconnecting a first end of an intermediate shaft and a steering shaft, and a second universal joint for interconnecting a second end of the intermediate shaft and an input shaft of a steering gear. The intermediate shaft includes a hollow bellows portion having slant convexes and slant concaves alternating with each other. A line interconnecting the joint centers of the first and second universal joints is tilted to the center axis of the intermediate shaft at a predetermined angle. At motor vehicle collision, a bending moment derived from an impact force of the collision is exerted on the intermediate shaft because the line is tilted. As a result, the intermediate shaft is bucklingly contracted at the bellows portion thereof.

Abstract: A shock absorbing steering apparatus for motor vehicle includes an intermediate shaft including first and second ends. The intermediate shaft includes a hollow bellows portion having convexes and concaves alternating with each other. The convexes include at least one slant convex. A plane including a ridge line of the slant convex is tilted to a perpendicular plane perpendicular to a center axis of the intermediate shaft. As a result, a part of an axial force exerted on the intermediate shaft at a motor vehicle collision is converted to a bending force on the intermediate shaft.

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: An electric power steering apparatus comprises a driving gear driven by an electric motor for steering assist and a driven gear meshed with the driving gear. A steering shaft is rotated along with the driven gear. The steering shaft is rotatably supported by a first bearing and a second bearing. An urging member is arranged in a recess provided in a housing. The urging member urges at least one of the first bearing and the second bearing in a direction in which a center-to-center distance between the driving gear and the driven gear increases.

Abstract: An electric power steering apparatus includes a worm interlockedly connected to an output shaft of an electric motor, a first and a second bearing each supporting the respective side of the worm in a housing, and a gear wheel meshed with the worm. The housing includes a fitting bore in which the first bearing supporting a side of the worm closer to the electric motor is to be fitted, and an annular retaining portion located at a position corresponding to the second bearing and eccentrically oriented with respect to the center (axial center) of the fitting bore in a direction that shortens a distance L between the center of rotation of the worm and that of the gear wheel, and the annular retaining portion retains a coil spring around an outer circumference of the second bearing.

Abstract: An electric power steering apparatus comprises a transmission mechanism for transmitting driving force of a steering assisting electric motor to a steering mechanism. A driven gear of the transmission mechanism is rotatably supported by first and second bearings. One of the first and second bearings includes an inner ring coupled so as to be rotatable together with an output shaft of a steering shaft, an outer ring held on a housing, and a rolling element interposed between the inner ring and the outer ring. One of the inner ring and the outer ring includes an annular elastic plate giving a preload to the rolling element.

Abstract: An electric power steering apparatus in which a shaft of a worm interlocking with rotation of a motor for steering assistance is movable in a radial direction, a pressing body for pressing the worm toward a worm wheel is provided, and the pressing body is provided with a V-shaped contact portion to abut in two circumferential positions of the shaft and an annular elastic body for restricting movement of the pressing body in a direction crossing the radial direction.

Abstract: A tilt steering apparatus has a pivot fixed to, for example, a pair of fixed side plates of a vehicle body. The pivot is inserted through a connection hole provided in a steering column. At the time of tilt adjustment, the steering column is swung around the pivot. In either one of an inner peripheral surface of the connection hole and an outer peripheral surface of the pivot opposite thereto, a projection extending in a substantially circumferential or axial direction is formed in contact with the other peripheral surface. Consequently, the contact area between the pivot and the connection hole is reduced, thereby reducing friction therebetween. When the pivot is pressed into the connection hole, the projection is suitably crushed, so that fitting between the pivot and the connection hole is loosened, which is useful for the reduction in the friction therebetween.

Abstract: A tilt steering apparatus has a pivot fixed to, for example, a pair of fixed side plates of a vehicle body. The pivot is inserted through a connection hole provided in a steering column. At the time of tilt adjustment, the steering column is swung around the pivot. In either one of an inner peripheral surface of the connection hole and an outer peripheral surface of the pivot opposite thereto, a projection extending in a substantially circumferential or axial direction is formed in contact with the other peripheral surface. Consequently, the contact area between the pivot and the connection hole is reduced, thereby reducing friction therebetween. When the pivot is pressed into the connection hole, the projection is suitably crushed, so that fitting between the pivot and the connection hole is loosened, which is useful for the reduction in the friction therebetween.

Abstract: An electric power steering apparatus in which a shaft of a worm interlocking with rotation of a motor for steering assistance is movable in a radial direction, a pressing body for pressing the worm toward a worm wheel is provided, and the pressing body is provided with a V-shaped contact portion to abut in two circumferential positions of the shaft and an annular elastic body for restricting movement of the pressing body in a direction crossing the radial direction.