Abstract: A wheel bearing device includes a wheel bearing supported by a knuckle; a hub ring having a boss portion; a second constant-velocity joint; and a first constant-velocity joint. The second constant-velocity joint includes an outer ring rotatably supported by the wheel bearing, and an inner ring coupled to the boss portion of the hub ring. The first constant-velocity joint includes an outer ring coupled to the outer race of the second constant-velocity joint, and an inner ring coupled to a drive shaft. The knuckle supports a pair of camber angle-adjusting linear motion actuators, and a pair of toe angle-adjusting linear motion actuators.

Abstract: The present invention provides a vehicle including wheels, and a steering module configured to steer the wheels in one of two mutually opposite right and left directions, or in one and the other of the two mutually opposite right and left directions, respectively. In the vehicle, a caster angle is set within the range of ±3 degrees relative to a kingpin angle. Though each wheel usually forms a camber angle when steered, by setting in the wheel the caster angle beforehand within the above range, the wheel does not or is less likely to form the camber angle because the camber angle and the caster angle cancel each other. Therefore, it is possible to prevent the steering angles of the wheels from being restricted, and to prevent the deterioration of steering operability.

Abstract: The power transmission device includes an input shaft that rotates about its axis together with a vehicle wheel. A driving gear is arranged coaxially with the input shaft so as to rotate about the axis of the input shaft together with the input shaft. A driven gear meshes with the driving gear, and configured to transmit a rotational force to an output shaft connected to a regenerative energy converter. A wheel bearing for the vehicle wheel supports the input shaft such that the input shaft is rotatable about its axis relative to the driven gear.

Abstract: The present invention provides a wheel bearing device including a wheel bearing supported by a knuckle; a hub ring having a boss portion; a second constant-velocity joint; and a first constant-velocity joint. The second constant-velocity joint includes an outer ring rotatably supported by the wheel bearing, and an inner ring coupled to the boss portion of the hub ring. The first constant-velocity joint includes an outer ring coupled to the outer race of the second constant-velocity joint, and an inner ring coupled to a drive shaft. The knuckle supports a pair of camber angle-adjusting linear motion actuators, and a pair of toe angle-adjusting linear motion actuators.

Abstract: The power transmission device includes an input shaft that rotates about its axis together with a vehicle wheel. A driving gear is arranged coaxially with the input shaft so as to rotate about the axis of the input shaft together with the input shaft. A driven gear meshes with the driving gear, and configured to transmit a rotational force to an output shaft connected to a regenerative energy converter. A wheel bearing for the vehicle wheel supports the input shaft such that the input shaft is rotatable about its axis relative to the driven gear.

Abstract: A steering device is provided which allows the vehicle to move laterally and turn with a small radius, without using a complicated mechanism, and capable of stably controlling the steering angle during such modes. The steering device includes a pair of rack bars connected, respectively, to front right and front left vehicle wheels or rear right and rear left vehicle wheels, synchronizing gears disposed between the pair of rack bars, a synchronizing gear box retaining the synchronizing gears, a rack case fixed to the frame of the vehicle, and a fixing mechanism for fixing the synchronizing gear box to the rack case.

Abstract: A steering device includes tie rods connected to right and left wheels, and rack bars connected to the respective tie rods. The steering device is capable of simultaneously steering the right and left wheels to the right or left of the vehicle, by moving the rack bars to the right or left. A rack bar moving arrangement is provided which is capable of moving the rack bars in opposite directions by the same distance, and rack teeth are arranged along the opposite directions. The rack bar moving arrangement includes a synchronizing gear in mesh with the rack bars, and is configured to convert the movement of one of the rack bars in one of the opposite directions to the movement of the other of the rack bars in the other opposite direction, thereby steering the wheels in opposite directions.

Abstract: It is desired to reduce the manufacturing cost of a vehicle while ensuring stability of travel of the vehicle. The vehicle includes a steering force generating means, and a steering device (10, 20) for steering right and left wheels (w). The steering device (10, 20) includes tie rods (12 and 22) connected, respectively, to the right and left wheels (w), and configured to steer the respective right and left wheels, a pair of rack bars (53 and 54) connected to the respective tie rods (12 and 22), and a rack bar moving means (60) capable of moving, by a same distance, the pair of rack bars (53 and 54) in one of opposite directions or in one and the other of the opposite directions, respectively, whereby the pair of rack bars (53 and 54) are moved simultaneously with each other under the steering force generated by the steering force generating means.

Abstract: The present invention provides a vehicle including wheels, and a steering module configured to steer the wheels in one of two mutually opposite right and left directions, or in one and the other of the two mutually opposite right and left directions, respectively. In the vehicle, a caster angle is set within the range of ±3 degrees relative to a kingpin angle. Though each wheel usually forms a camber angle when steered, by setting in the wheel the caster angle beforehand within the above range, the wheel does not or is less likely to form the camber angle because the camber angle and the caster angle cancel each other. Therefore, it is possible to prevent the steering angles of the wheels from being restricted, and to prevent the deterioration of steering operability.

Abstract: A vehicle includes a steering force generating arrangement, and a steering device for steering right and left wheels of the vehicle. The steering device includes tie rods connected, respectively, to the right and left wheels, and configured to steer the respective right and left wheels, a pair of rack bars connected to the respective tie rods, and a rack bar moving arrangement capable of moving, by the same distance, the pair of rack bars in one of opposite directions or in one and the other of the opposite directions, respectively, whereby the pair of rack bars are moved simultaneously with each other under the steering force generated by the steering force generating arrangement.

Abstract: A steering device is provided which allows the vehicle to move laterally and turn with a small radius, without using a complicated mechanism, and capable of stably controlling the steering angle during such modes. The steering device includes a pair of rack bars connected, respectively, to front right and front left vehicle wheels or rear right and rear left vehicle wheels, synchronizing gears disposed between the pair of rack bars, a synchronizing gear box retaining the synchronizing gears, a rack case fixed to the frame of the vehicle, and a fixing mechanism for fixing the synchronizing gear box to the rack case.

Abstract: A machine tool includes a first movable base movable in a horizontal plane in a first direction, a second movable base mounted on the first movable base and movable toward and away from a workpiece in the horizontal plane in a second direction transverse to the first direction, a support base mounted on the movable base, and a spindle stock supported on the support base and rotatable about a center in a vertical plane. A spindle device is mounted on an outer end of the spindle stock at a position off the center. The spindle stock may be an arm rotatable about a longitudinal center thereof, or substantially disc-shaped. The support base has an annular support member disposed on a front surface thereof coaxially with the center, the spindle stock includes a slidable member held in slidable contact with the annular support member.