Jtekt Corporation

Hiromitsu Tomiyama

Hidenobu Tanaka

Masayuki Nagaoka

Atsumune Nagatani

Kenichi Aota

Yoshihito Yoshihara

A steering system includes an insertion shaft that is movable in a tilt direction C along with a column jacket, a first tooth member including a plurality of first teeth aligned along a first linear direction, and a second tooth member including a plurality of second teeth aligned along the first linear direction. A first restriction portion restricts movement of the first tooth member in the first linear direction with respect to an upper bracket. A second restriction portion is movable in the first linear direction and immovable in a second linear direction, with respect to a linear slot in the first tooth member that extends along the first linear direction. The second restriction portion restricts movement of the second tooth member in the second linear direction with respect to the first tooth member.

Steering system

In a steering system, a pair of side plates of an upper bracket support first tooth rows each including a plurality of first teeth arranged at a pitch and second tooth rows each including a plurality of second teeth arranged at the pitch. An insertion shaft supports third teeth that can come into and out of contact with the first tooth rows and fourth teeth that can come into and out of contact with the second tooth rows. One pair out of a pair of the tooth tip of each first tooth and the tooth tip of the corresponding second tooth and a pair of the tooth tip of each third tooth and the tooth tip of the corresponding fourth tooth are in the same position in a tilt direction, and the other pair are displaced from each other by a length smaller than the pitch in the tilt direction.

A steering system includes a lock mechanism and a releasing member. The lock mechanism includes a clamping shaft inserted through insertion holes in side plates, an operation lever that rotationally operates the clamping shaft, a rotational cam coupled to the clamping shaft so as to be rotatable integrally therewith and movable integrally therewith in an axial direction, a first clamping member that moves the rotational cam in the axial direction with respect to the side plates, and a stopper that restricts a rotation range of the clamping shaft. The releasing member includes a fitting portion located between the side plates and fitted on an outer peripheral surface of the clamping shaft so as to provide a clamping margin, and frictionally slides the fitting portion in the axial direction with respect to the clamping shaft when the rotational cam moves in the axial direction with respect to the side plates.

A steering system includes: a first tooth member provided with a first tooth row that includes a plurality of first teeth each of which has a tooth trace extending in a lateral direction and which are aligned along a tilt direction, the first tooth row being elastically deformable in the lateral direction, and a second tooth member including a second tooth row that includes a plurality of second teeth each of which has a tooth trace extending in the lateral direction and which are aligned along the tilt direction, the second tooth member facing the first tooth member in the lateral direction. The first tooth member is supported by an upper bracket such that the first tooth row is disposed away from the upper bracket in the lateral direction. The second tooth member is movable in the tilt direction along with a column jacket.

A steering system includes: an upper bracket that supports a column jacket so that the column jacket is pivotable about a central shaft; a pair of first tooth rows that are supported by the upper bracket and are arranged side by side in an axial direction; and a tooth member that is pivotable together with the column jacket and is movable in a right-and-left direction. The tooth member has second teeth that are formed in two locations spaced apart from each other in the axial direction and that can mesh with the pair of the first tooth rows. The tooth tip angle of first teeth in one first tooth row of the pair of the first tooth rows is different from the tooth tip angle of the first teeth in the other first tooth row that is more distant from the central shaft than the one first tooth row.

A steering system includes an upper bracket having a first tooth row, a rigid tooth member, a second tooth row provided on the tooth member, a first moving member, and an elastic member disposed between the tooth member and the first moving member. The first tooth row includes a plurality of first teeth. The second tooth row includes a plurality of second teeth. The elastic member exerts a constant restoration force. The second tooth row meshes with the first tooth row when the first teeth and the second teeth are alternately arranged in a tilt direction.

In a steering system configured such that occurrence of a half lock is suppressed, when a body portion of a tooth member is pressed in a lock operation of locking the position of a steering column, the tooth member is extended to move a pair of second tooth row forming portions away from each other obliquely with respect to a lateral direction of an elongate tilt hole along the outer surface of a fastening side plate.

Growing community of inventors

Kashihara, Japan

Hiromitsu Tomiyama