An automobile having sets of front and rear wheels, of which one or both sets are steerable wheels and one or both sets are driven wheels. Each steerable wheel is rotatably supported on a respective steering knuckle that is swivelable about an upright steering axis, and is coupled to the frame by a suspension system for relative movement upwardly and downwardly of the automobile's frame. The steering knuckle of each steerable wheel is movable through a ninety degree range between a straight-ahead position for longitudinally straight travel of the automobile in a normal road travel mode, and a ninety-degree position for lateral travel of the automobile in another mode.

A suspension joining structure includes: a lower arm having one end fastened to a vehicle body; an assist knuckle having a strut thereon; a fastening unit configured to connect one end of the lower arm and a lower end of the assist knuckle to each other; a suspension fastened to the assist knuckle and rotating independently of the assist knuckle for steering of a wheel; a steering input part connected to the assiste knuckle, and configured such that a steering force is applied to the suspension upon steering; and a rotation transfer unit arranged between the suspension and the steering input part.

A suspension joining structure includes: a lower arm having one end fastened to a vehicle body; an assist knuckle having a strut thereon; a fastening unit configured to connect one end of the lower arm and a lower end of the assist knuckle to each other; a suspension fastened to the assist knuckle and rotating independently of the assist knuckle for steering of a wheel; a steering input part connected to the assiste knuckle, and configured such that a steering force is applied to the suspension upon steering; and a rotation transfer unit arranged between the suspension and the steering input part.

A movable object includes: a body part forming a main body; a wheel provided on a left side or a right side of the body part; a steering module connecting the body part and the wheel, wherein the steering module controls movement of the wheel in a manner that steers the wheel to the left when the wheel moves upward with respect to the body part, and steers the wheel to the right when the wheel moves downward with respect to the body part.

A movable object includes: a body part forming a main body; a wheel provided on a left side or a right side of the body part; a steering module connecting the body part and the wheel, wherein the steering module controls movement of the wheel in a manner that steers the wheel to the left when the wheel moves upward with respect to the body part, and steers the wheel to the right when the wheel moves downward with respect to the body part.

An electric commercial vehicle power steering system includes an input shaft, an electric motor, and a planetary gear set, a drive coupling, and an output shaft. A first one of a sun gear, a planet carrier, and a ring gear of the planetary gear set is connected to and rotatable with a rotor of the electric motor, and a second one of the sun gear, the planet carrier, and the ring gear of the planetary gear set is connected to and rotatable with a first gear of the drive coupling. A second gear of the drive coupling is connected to and rotatable with the input shaft. A globoidal worm drive is arranged between the input shaft and the output shaft. The globoidal worm drive couples the input shaft to the output shaft such that the output shaft is rotatable with the input shaft via the globoidal worm drive.

An electric commercial vehicle power steering system includes an input shaft, an electric motor, and a planetary gear set, a drive coupling, and an output shaft. A first one of a sun gear, a planet carrier, and a ring gear of the planetary gear set is connected to and rotatable with a rotor of the electric motor, and a second one of the sun gear, the planet carrier, and the ring gear of the planetary gear set is connected to and rotatable with a first gear of the drive coupling. A second gear of the drive coupling is connected to and rotatable with the input shaft. A globoidal worm drive is arranged between the input shaft and the output shaft. The globoidal worm drive couples the input shaft to the output shaft such that the output shaft is rotatable with the input shaft via the globoidal worm drive.

A suspension system for a vehicle may include a steering knuckle operably coupled to a wheel hub, and a plurality of links operably coupling the steering knuckle to a chassis of the vehicle. One of the links may be a trailing blade having a body portion that lies in a plane. The trailing blade may include a first end operably coupled to the steering knuckle and a second end operably coupled to the chassis. The trailing blade may extend from the first end to the second end such that the plane of the body portion forms an angle of greater than 5 degrees relative to a longitudinal axis of the vehicle.

A suspension system for a vehicle may include a steering knuckle operably coupled to a wheel hub, and a plurality of links operably coupling the steering knuckle to a chassis of the vehicle. One of the links may be a trailing blade having a body portion that lies in a plane. The trailing blade may include a first end operably coupled to the steering knuckle and a second end operably coupled to the chassis. The trailing blade may extend from the first end to the second end such that the plane of the body portion forms an angle of greater than 5 degrees relative to a longitudinal axis of the vehicle.

A modular chassis is provided for an off-road vehicle to improve assembly, servicing, and repairing of a drivetrain of the off-road vehicle. The modular chassis includes a chassis to support components of the off-road vehicle. A front frame module couples with a front of the chassis, and a rear frame module couples with a rear of the chassis. The front frame module supports lower suspension arms of the off-road vehicle by way of inboard bushing joints. The front frame module supports at least a steering gear and a front differential of the off-road vehicle. The rear frame module is a tube-frame structure that supports components of the off-road vehicle. A lower portion of the rear frame module extends rearward and acutely upward to a top frame member that couples with upper side portions of the chassis. Several cross-members impart structural integrity to the rear frame module.