A rotation induction device for a vehicle includes: an upper case member composed of a synthetic resin material and having a piston rod disposed therethrough; a lower case member composed of a synthetic resin material, disposed under the upper case member, and having the piston rod disposed therethrough; a center plate composed of a synthetic resin material, disposed between the upper and lower case members such that the piston rod passes through the center plate, and configured to induce either one or both of the upper and lower case members to rotate; and a stress distribution part formed on the center plate, and configured to distribute stress caused by a vertical load.

A rotation induction device for a vehicle includes: an upper case member composed of a synthetic resin material and having a piston rod disposed therethrough; a lower case member composed of a synthetic resin material, disposed under the upper case member, and having the piston rod disposed therethrough; a center plate composed of a synthetic resin material, disposed between the upper and lower case members such that the piston rod passes through the center plate, and configured to induce either one or both of the upper and lower case members to rotate; and a stress distribution part formed on the center plate, and configured to distribute stress caused by a vertical load.

A strut assembly including a reservoir tube that extends about and along a center axis and has an interior surface and defines a chamber. A bearing sleeve is disposed in the chamber of the reservoir tube and extends about and along the center axis between a proximal end and a distal end. The bearing sleeve presents an inner surface and an outer surface. A damper body tube is disposed in the bearing sleeve and is moveable relative to the bearing sleeve. A piston assembly is disposed in the damper body tube. The outer surface of the bearing sleeve has a tubular portion and a protrusion portion that extends radially outwardly relative to the tubular portion and annularly and providing an interference fit between the outer surface of the bearing sleeve and the interior surface of the reservoir tube.

A strut assembly including a reservoir tube that extends about and along a center axis and has an interior surface and defines a chamber. A bearing sleeve is disposed in the chamber of the reservoir tube and extends about and along the center axis between a proximal end and a distal end. The bearing sleeve presents an inner surface and an outer surface. A damper body tube is disposed in the bearing sleeve and is moveable relative to the bearing sleeve. A piston assembly is disposed in the damper body tube. The outer surface of the bearing sleeve has a tubular portion and a protrusion portion that extends radially outwardly relative to the tubular portion and annularly and providing an interference fit between the outer surface of the bearing sleeve and the interior surface of the reservoir tube.

Provided are: a slide bearing configured so that degradation in sliding performance caused by the entry of dust, muddy water, etc. can be prevented at low cost; and a strut-type suspension using the slide bearing. A slide bearing (1) is provided with: an upper case (2); a lower case (3) joined to the upper case (2) in a pivotal manner and forming an annular space (5) between the upper case (2) and the lower case (3); and an annular center plate (4) disposed in the annular space (5). An annular lip (43) is formed integrally at the outer peripheral edge (423) of the flange (42) of the center plate (4). The lip (43) is in contact, while deflecting, with an annular protrusion (252) formed in an annular groove (24) in the upper case (2) and covers a thrust bearing surface (422) and a thrust supporting surface (251).

Provided are: a slide bearing configured so that degradation in sliding performance caused by the entry of dust, muddy water, etc. can be prevented at low cost; and a strut-type suspension using the slide bearing. A slide bearing (1) is provided with: an upper case (2); a lower case (3) joined to the upper case (2) in a pivotal manner and forming an annular space (5) between the upper case (2) and the lower case (3); and an annular center plate (4) disposed in the annular space (5). An annular lip (43) is formed integrally at the outer peripheral edge (423) of the flange (42) of the center plate (4). The lip (43) is in contact, while deflecting, with an annular protrusion (252) formed in an annular groove (24) in the upper case (2) and covers a thrust bearing surface (422) and a thrust supporting surface (251).

A vehicle knuckle 1 includes a main body 10, a strut junction 11 that is positioned at a first side in an extending direction of an axle supported by the main body and fastens a strut damper, and an arm 12 that couples the main body to the strut junction. The vehicle knuckle has a continuous space 17 formed inside the strut junction and the arm. The arm has a first through-hole 17a on a wall 12a that couples an end 10d at the first side of the main body to the strut junction. The first through-hole is formed, with being adjacent to the end at the first side, at the side of the main body with respect to the center of a coupling position of the wall and the main body and a coupling position of the wall and the strut junction and is communicated with the space.

A vehicle knuckle 1 includes a main body 10, a strut junction 11 that is positioned at a first side in an extending direction of an axle supported by the main body and fastens a strut damper, and an arm 12 that couples the main body to the strut junction. The vehicle knuckle has a continuous space 17 formed inside the strut junction and the arm. The arm has a first through-hole 17a on a wall 12a that couples an end 10d at the first side of the main body to the strut junction. The first through-hole is formed, with being adjacent to the end at the first side, at the side of the main body with respect to the center of a coupling position of the wall and the main body and a coupling position of the wall and the strut junction and is communicated with the space.

A rotation induction device for a vehicle, includes an upper case member, a lower case member, a center plate, and an inflow prevention part. The upper case member has a piston rod disposed therethrough. The lower case member, disposed under the upper case member, has the piston rod disposed therethrough. The center plate, disposed between the upper and lower case members such that the piston rod passes through the center plate, is configured to induce either one or both of the upper and lower case members to rotate. The inflow prevention part, formed in the upper and lower case members, is configured to block the inflow of foreign matters. Each of the upper case member, the lower case member, and the center plate is composed of a synthetic resin material.

A strut assembly including a spring to help absorb impacts and a shock absorber to help control motion of the spring is disclosed. The shock absorber includes a base assembly and is mounted between a top mount assembly and a knuckle. The top mount assembly mounts to the body of the vehicle and helps support the spring. An upper spring seat is adjacent the top mount assembly and receives one end of the spring. A lower spring seat formed of a composite material is supported by the base assembly and is adapted to support another end of the spring. The lower spring seat includes at least one reinforcing element having a plurality of reinforcing cords disposed between an upper surface and a lower surface for improving impact resistance thereof.