The present disclosure provides a steering system of an engineering vehicle, and a backhoe loader. The steering system includes: a direction control device, including a steering wheel, a steering cylinder and steerable wheels, the steering cylinder being in transmission connection with the steering wheel and the steerable wheels; a displacement sensor configured to detect a piston displacement of the steering cylinder; a return motor in transmission connection with the steerable wheels to drive the steerable wheels to return to a normal position; and a controller in signal connection with the displacement sensor and the return motor, and configured to output a control signal according to the piston displacement detected by the displacement sensor to manipulate the return motor to drive the steerable wheels to return. The backhoe loader includes the steering system.

A rotary electric machine control device for controlling a rotary electric machine having multiple winding sets includes multiple inverter circuits, multiple power supply relays, and multiple controllers provided for respective systems. Each of the controllers is configured to monitor an abnormality of a subject system and an abnormality of a different system and is configured to turn off a power supply relay in the subject system when an abnormality requiring a power supply stop occurs in the subject system. Each of the controllers is further configured to acquire power supply relay information related to a state of the power supply relay of the different system through a signal line, and is configured to monitor the abnormality of the different system based on the power supply relay information.

A driving device includes an electric motor, a rotating shaft, a motor housing, a printed circuit board, an electric power converting circuit, a rear frame end working as a heat radiating member, gel working as a heat transfer member, multiple mounted parts and so on. The heat radiating member is located on a side of the printed circuit board and facing a motor-side surface of the printed circuit board, to which multiple switching elements are mounted. The gel is plastically deformed and adhered to the switching elements and the heat radiating member for transferring heat of the switching elements to the heat radiating member. At least one of the mounted parts is mounted to the printed circuit board and located at a position between a through-hole opposing area and one of the switching elements, which is located at a position closest to a rotational angle sensor mounted to the printed circuit board in the through-hole opposing area.

A steering torque feedback assembly for a vehicle steering column includes a housing, a first gear rotatably mounted within the housing about a first rotatable axis and being configured to rotate with, or being connected to, a vehicle steering column, first and second electric motors mounted within the housing, each having a rotatable output shaft, second and third gears rotatably mounted within the housing and engaged with the first gear, and first and second reduction gearing connecting the output of the first and second motors and a respective one of the second and third gears.

In a steer-by-wire steering apparatus according to embodiments of the present invention, a structure for preventing rotation of a sliding bar in order to allow the sliding bar to slide in the axial direction by the torque of a motor or a structure for determining a position to which the sliding bar moves can be more simply implemented, whereby the number of components can be reduced, the assembly process can be simplified, and the cost can be significantly reduced.

Power assisted steering systems provide a gear reduction of approximately 25:1 between a steering wheel and a steering mechanism and approximately 625:1 between an electric motor and a steering mechanism. The system is back-driveable from the steering mechanism. In one embodiment, the gear reduction is provided primarily by three planetary gear sets, with the remainder provided by axis transfer gearing. In another embodiment, the gear reduction is provided primarily by a cycloidal gear set, with the remainder provided by axis transfer gearing.

Assist torque or reaction force torque with little unnatural feeling to a driver is applied. An ECU includes: a control amount calculation section that calculates a control amount for controlling magnitude of the assist torque or the reaction force torque with reference to steering torque applied to a steering member; and a control amount correction section that corrects the control amount calculated by the control amount calculation section with reference to a lateral G of a vehicle body, a steering angle of the steering member, and a steering angle speed of the steering member.

A steering device includes: a worm wheel linked to a steering shaft; a worm shaft engaging with the worm wheel; an electric motor supplying rotational force to the worm shaft and including a motor shaft connected to a first end of the worm shaft; a gear housing containing the worm wheel and the worm shaft; a bearing supporting a second end of the worm shaft; a center adjuster that is contained in the gear housing and includes a holder and a collar, wherein the collar is disposed in the holder and retains the bearing so as to allow the bearing to move with respect to the holder in a gear engagement direction; and a biasing member disposed in the center adjuster and structured to bias the bearing in a direction inclined with respect to the gear engagement direction.

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 axle for a steerable vehicle has an axle housing and a steering drive with an electric motor and motor shaft. A first planetary stage includes a first sun gear, first planet gears, and a first planet carrier. A last planetary stage includes a last sun gear, last planet gears, a last planet carrier, and a ring gear. A force flux from the motor shaft runs via the first sun gear and the first planet gears to the first planet carrier. The force flux furthermore runs via the last sun gear to the last planet gears. The force flux furthermore runs from the last planet gears to the ring gear. In relation to the axle housing, the ring gear is pivotably mounted about a pivot axis. The last planet carrier is connected in a rotationally fixed manner to the axle housing. Also disclosed is a corresponding industrial truck.