A drive (1) for a steering axle (26) of an industrial truck includes two steering arms (11, 12), an axle arch (8), a tie rod (13) configured as a spindle (13), a spindle nut (7) fixed axially on the tie rod (13), and a gear stage (21). Adjustment of the steering arms (11, 12) can be effected by axial displacement of the tie rod (13), and by the spindle nut (7) being able to be driven by a drive output element (7) of the gear stage (21). The drive (1) has two mutually coaxial electric motors (17, 18) disposed parallel to the tie rod (13). A drive element (14) of the gear stage (21) can be driven by the two electric motors (17, 18), which are disposed so as to be axially centric between the two electric motors (17, 18). Also disclosed is a steering axle and an industrial truck.

A steering drive for a steering axle of a steerable vehicle includes an electric motor with a motor shaft. A steering lever is rotatable about a pivot axis that is parallel to the electric motor. First and second planetary stages each have a sun gear, planet gears, and a planet carrier. The steering drive is configured such that a force flow runs from the first sun gear via the first planet gears to the first planet carrier. The force flow furthermore runs via the second sun gear and via the second planet gears to the second planet carrier, and furthermore runs to the steering lever. The steering drive has a spur gear stage and is configured such that a force flow from the motor shaft to the first sun gear runs via the spur gear stage. Also disclosed is a steering axle and an industrial truck.

A rack assist type power steering apparatus according to the embodiments of the present disclosure comprises a rack bar provided with an outer screw groove on an outer circumferential surface, a ball nut having an inner screw groove corresponding to the outer screw groove on an inner circumferential surface, and a bearing coupled to an outer circumferential surface, and a nut pulley provided with a belt coupling portion on an outer peripheral surface, and one end of an inner circumferential surface is provided with a support end coupled to an outer circumferential surface of the ball nut to support the bearing, and an other end of an inner circumferential surface is provided with an enlarged diameter portion which is stepped from the support end and increases in inner diameter.

Provided is a steering device including a lock nut that fixes an outer race of a turning nut threadably engaged with a rack bar. A loosening prevention protruding portion formed on a lock nut main body is brought into contact with a radial-direction abutting portion to prevent loosening of the lock nut with a frictional force. At the same time, a lock nut recessed portion for reducing mechanical stiffness is formed in an outer peripheral surface of the loosening prevention protruding portion so that an external force acting from the outer race is buffered by the lock nut recessed portion. In this manner, a decrease in contact area between the loosening prevention protruding portion and the radial-direction abutting portion is reduced.

To restrain a retracting stabilizer from interfering with an assist motor located rearward thereof and ensure energy absorption by a subframe, a vehicle front structure includes an engine; a steering rack disposed frontward of the engine; an assist motor for power steering disposed frontward of the steering rack; a suspension stabilizer disposed frontward of the assist motor; and a subframe mounted with the stabilizer. The stabilizer frontward of the assist motor is disposed offset from the assist motor in an up-down direction so as not to overlap the assist motor in vehicle front view.

Provided are a vehicle chassis and a vehicle, which are related to a field of vehicle technology, in particular to fields of automatic driving technology and driving test technology. The vehicle chassis includes: a chassis support, a steering system, an electrical system, a driving system, and two brake systems. The chassis support is provided with a steering system mounting site, an electrical system mounting site, a driving system mounting site, and two brake system mounting sites; which are arranged in sequence along a length direction of the vehicle chassis. A first brake system mounting site is disposed between the steering system mounting site and the electrical system mounting site; and a second brake system mounting site is disposed between the driving system mounting site and the electrical system mounting site. The two brake systems, the driving system and the steering system are communicatively connected to the electrical system.

A main power supply having a large capacity and a backup power supply having a small capacity are switchable by a power supply switching determination unit in a system. A motor control device drives a motor by the main power supply or the backup power supply. A drive control unit outputs a drive signal, calculated by feedback control of the current detection value with respect to the current command value, to an inverter circuit. When the power supply switching determination unit switches from the main power supply to the backup power supply, the drive control unit moves from a normal control using the main power supply to a backup control that restricts an electric power consumption and prevents the backup power supply from stopping.

The present disclosure relates to a steering-assisting device. Specifically, a steering-assisting device according to the present disclosure comprises: a stator having a plurality of coils wound thereon; a rotor which is rotated by the stator; and a connection part for transferring rotation force generated in accordance with rotation of the rotor to a rack bar, wherein the connection part is connected to the rack bar in a manner for minimizing vibration generated according to a winding pattern of the stator when at least one of the coils of the stator malfunctions.

A steering device includes: a rack shaft; a rack housing; a pinion shaft that meshes with the rack shaft; a speed reducer having a worm wheel that is coupled to the pinion shaft and a worm shaft that meshes with the worm wheel; a speed reducer housing; a motor that drives the worm shaft; a plate-shaped cover that seals an opening of the speed reducer housing; and a breather valve that is mounted on the cover in a state of penetrating through the cover. An inner surface of the cover that faces the worm wheel has an entry restricting part that restricts entry of a lubricant into the breather valve.

A steering system of a vehicle includes a toothed rack which is connectable to wheels of the vehicle to turn the wheels, a steering drive for displacing the toothed rack with a motor unit and a gear unit where the gear unit is connected to the toothed rack and converts a rotation of the motor unit into a displacement of the toothed rack, and a force transmission element disposed between the motor unit and gear unit. The force transmission element has a core element and a covering element which at least partially surrounds the core element. The core element has a greater strength than the covering element and has protruding regions for producing a positive-locking connection with respect to the motor unit and the gear unit and has connection regions which connect the protruding regions. The covering element is in direct contact with the motor unit and the gear unit.