To reduce the effect of a steering operation on feeling. A rack bush comprises: a bush body that is accommodated in a cylindrical housing, supports a load exerted on a rack bar while allowing the rack bar to move in the direction of an axial center O, and can be extended and retracted in a radial direction; and an elastic ring mounted on the bush body. The bush body has a mounting groove for mounting the elastic ring, the mounting groove being formed peripherally in an outer peripheral surface, and the mounting groove having a large-diameter part where the circumferential radius of a groove bottom is a first radius r1, and a small-diameter part where said radius is a second radius r2 that is less than the first radius r1. This configuration allows the formation of an elastic ring protruding part, in which the elastic ring protrudes greatly from the outer peripheral surface of the bush body, and an elastic ring embedded part, in which the elastic ring is embedded in the outer peripheral surface of the bush body.

A device for a steering system of a motor vehicle for pressing a toothed rack against a drive pinion is specified, the device having a housing and a thrust piece which is mounted displaceably in the housing and which has a circumferential wall which is in contact with the housing, the thrust piece having, on its circumferential wall, at least one depression which runs in a circumferential direction at least in certain portions and which delimits a hollow chamber arranged between thrust piece and housing.

A rack guide bearing for meshing a pinion and vehicle steering system rack, the guide bearing including a wall, a first portion is tubular and defines an axis and internal channel around the axis opening at the guide bearing first end, and opening onto a second portion of the wall opposite the first end, an internal channel section transverse to the axis and inserts the rack into the channel according to the rack axis parallel to the guide bearing axis, the guide bearing including an internal channel inner surface of the guide bearing wall's first portion and an inner surface of the guide bearing wall's second portion, the inner surfaces are in slipping contact with a slipping surface of the rack opposite to a toothing of the rack, when the rack is inserted inside the first portion of the wall's internal channel according to the axis of the rack.

A steering device includes: a housing; and a spring configured to urge the retainer toward the rack bar in the second axis direction, and the rack bar, the retainer, the spring, and the spring holding member being disposed in this order in the second axis direction; the retainer chamfering portion provided on the retainer second end portion near the spring holding member, on a retainer second end portion outer circumference portion, and the retainer chamfering portion formed at a portion which is nearest the spring holding member abutment surface in the retainer second end portion outer circumference portion in a section that passes through the second axis, and that is perpendicular to the first axis, when the retainer main body portion is inclined with respect to the second axis.

A device for pressing a rack against a pinion, comprises a housing, a thrust piece which is shiftably guided in the housing along a pressing axis, a bearing element which can axially be fixed at the housing, an axially pressurized force introduction member, and wedge members which each support on the thrust piece, on the bearing element and on the force introduction member, wherein at least three wedge members uniformly distributed in circumferential direction are provided, and wherein the force introduction member urges the wedge members radially to the outside and the thrust piece axially away from the bearing element.

A rack supporting device for vehicle steering systems includes: a steering housing having a steering gear installed therein; a rack bar longitudinally inserted into the steering housing to engage with the steering gear; a tapered passage defined in an inner circumference of the steering housing, wherein the tapered passage is eccentric with an axial center of the steering housing; a rack bushing inserted between an inner circumference of the tapered passage and an outer circumference of the rack bar so that the rack bushing moves along the tapered passage and pushes the rack bar to the steering gear; and an elastic member mounted to one side of the tapered passage to provide an elastic pressing force for pushing the rack bar to the rack bushing.

A vehicle steering assembly comprises a steering member with a rack portion having rack teeth, a pinion gear having pinion teeth configured to be engaged with the rack teeth, a yoke support assembly supporting the steering member in a housing, and a ball nut operatively connected to the steering member. The pinion gear divides the steering member into a first side having the yoke support assembly outboard of an area of engagement of the rack and pinion teeth and a second side having the ball nut. The yoke support assembly includes complementary convex and concave bearing surfaces configured to provide relative rotation between the convex and concave bearing surfaces. The yoke assembly also includes a spring member configured to produce a variable rate spring force to maintain an engagement between the rack and pinion teeth.

A rack supporting device for vehicle steering systems includes: a steering housing having a steering gear installed therein; a rack bar longitudinally inserted into the steering housing to engage with the steering gear; a tapered passage defined in an inner circumference of the steering housing, wherein the tapered passage is eccentric with an axial center of the steering housing; a rack bushing inserted between an inner circumference of the tapered passage and an outer circumference of the rack bar so that the rack bushing moves along the tapered passage and pushes the rack bar to the steering gear; and an elastic member mounted to one side of the tapered passage to provide an elastic pressing force for pushing the rack bar to the rack bushing.

A vehicle steering assembly comprises a steering member with a rack portion having rack teeth, a pinion gear having pinion teeth configured to be engaged with the rack teeth, a yoke support assembly supporting the steering member in a housing, and a ball nut operatively connected to the steering member. The pinion gear divides the steering member into a first side having the yoke support assembly outboard of an area of engagement of the rack and pinion teeth and a second side having the ball nut. The yoke support assembly includes complementary convex and concave bearing surfaces configured to provide relative rotation between the convex and concave bearing surfaces. The yoke assembly also includes a spring member configured to produce a variable rate spring force to maintain an engagement between the rack and pinion teeth.

To reduce the effect of a steering operation on feeling. A rack bush comprises: a bush body that is accommodated in a cylindrical housing, supports a load exerted on a rack bar while allowing the rack bar to move in the direction of an axial center O, and can be extended and retracted in a radial direction; and an elastic ring mounted on the bush body. The bush body has a mounting groove for mounting the elastic ring, the mounting groove being formed peripherally in an outer peripheral surface, and the mounting groove having a large-diameter part where the circumferential radius of a groove bottom is a first radius r1, and a small-diameter part where said radius is a second radius r2 that is less than the first radius r1. This configuration allows the formation of an elastic ring protruding part, in which the elastic ring protrudes greatly from the outer peripheral surface of the bush body, and an elastic ring embedded part, in which the elastic ring is embedded in the outer peripheral surface of the bush body.