One example steering mechanism includes a first steering gear, where the first steering gear is configured to convert obtained driving force to transmit driving force to an outer-side wheel during steering, to control steering force applied to the outer-side wheel. The example steering mechanism includes a second steering gear, where the second steering gear is configured to convert obtained driving force to transmit driving force to an inner-side wheel during steering, to control steering force applied to the inner-side wheel. The first steering gear and the second steering gear are connected by using a first clutch. If the first clutch is in a disengaged state, driving force is not transmitted between the first steering gear and the second steering gear. If the first clutch is in an engaged state, driving force is transmitted between the first steering gear and the second steering gear.

When relative positions of cages are changed from first positions to second positions, rollers are moved toward each other against an elastic biasing force of an elastic member such that an off state is achieved in which the rollers are disengaged from a cam surface or an inner peripheral surface portion to have a clearance therefrom. When the relative positions of the cages are changed from the second positions to the first positions, the rollers are moved away from each other by the elastic biasing force such that an on state is achieved in which one of the rollers on a downstream side engages with the cam surface or the inner peripheral surface portion without any clearance while the other of the rollers on an upstream side has a clearance from the cam surface or the inner peripheral surface portion.

A steer-by-wire assembly for a steering system in a vehicle is described. The system includes a shaft rotatable in response to a steering input, a clutch that includes a brake member rotatable with the shaft and a reaction member, and an electromagnetic actuator that is selectively actuated to selectively provide a force to selectively engage the brake and reaction members. When the actuator is not actuated, the force between the brake and reaction members limits or prevents rotation of the brake member relative to the reaction member. And when the actuator is actuated, the force between the brake and reaction members is reduced or removed to permit rotation of the brake member relative to the reaction member.

A line marking device (1) comprising a cart (2) with at least one steerable wheel (3) and at least two moving elements (4, 5). The steerable wheel (3) is rotatable around its axle (13) and pivotable such that the cart (2) is steered in a desired direction. The line marking device (1) comprises a GNSS receiver (7) or a robotic total station mounted on the cart (2). The line marking device (1) also comprises at least one spray nozzle (8), for marking a line, which is mounted on the cart and directed towards the ground below the line marking device (1). The device (1) comprises an interface mounted on the cart for a comparator to compare a detected location by the GNSS receiver (7) to a predetermined pattern. The cart (2) may comprise a motor (14) which is adapted to pivot the steerable wheel (3) towards an intended movement.

The reverse input shutoff clutch includes: an input member, an output member coaxially arranged with the input member, a pressed member having a pressed surface, and an engaging element. The engaging element, when rotational torque is inputted to the input member, moves in a direction away from the pressed surface due to engagement with the input member and transmits the rotational torque to the output member, and when rotational torque is reversely inputted to the output member, moves in a direction toward the pressed surface due to engagement with the output member, and prevents or suppresses relative rotation between the output member and the pressed member.

A vehicle steering system includes: a housing, and a clutch module including a first steering shaft, a steering assembly, and a drive mechanism. A part of the first steering shaft and the steering assembly are disposed in the housing. The steering assembly is configured to move between a coupling position and a decoupling position, is coupled with the first steering shaft at the coupling position and transmits a torque, and is decoupled from the first steering shaft at the decoupling position and stops the transmission of the torque. A transmission unloading mechanism is configured to unload a limiting force of the drive mechanism on the steering assembly when the steering assembly is at the coupling position, connect with the drive mechanism and the housing to enable the drive mechanism connects with the steering assembly, and drive the steering assembly to move between the coupling position and the decoupling position.

The reverse input shutoff clutch includes: an input member, an output member coaxially arranged with the input member, a pressed member having a pressed surface, and an engaging element. The engaging element, when rotational torque is inputted to the input member, moves in a direction away from the pressed surface due to engagement with the input member and transmits the rotational torque to the output member, and when rotational torque is reversely inputted to the output member, moves in a direction toward the pressed surface due to engagement with the output member, and prevents or suppresses relative rotation between the output member and the pressed member.

One object is to provide a steering device that facilitates disengagement of a speed reducer so that, for example, when the speed reducer fails, the speed reducer can be disengaged to enable steering of a vehicle with a manual operational force alone. This application relates to a steering device provided with a steering mechanism and a speed reducer. The steering mechanism steers tires of a vehicle under a steering force from a steering wheel. The speed reducer is connected to a motor for outputting a steering assistance force corresponding to the steering force. The speed reducer enlarges the steering assistance force and transmits the enlarged steering assistance force to the steering mechanism. The speed reducer is connected to the steering mechanism via a speed reducer arm.

A vehicle steering system provided for a vehicle whose driving state is switchable between a manual driving state and an automatic driving state, the vehicle steering system including a coupling mechanism configured to couple a steering operation member operated by a driver and at least one steerable wheel of the vehicle, wherein, when the driving state of the vehicle is switched from the manual driving state to the automatic driving state, the coupling mechanism is switched from a mechanically coupling state in which the coupling mechanism mechanically couples the steering operation member and the at least one steerable wheel to each other to a mechanically decoupling state in which the coupling mechanism mechanically decouples the steering operation member and the at least one steerable wheel from each other.

A steering system for a vehicle, including an input shaft, via which a steering force can be input by a steering element, an output shaft acting on a steering actuating mechanism, a coupling for connecting and disconnecting the input shaft and the output shaft with and from each other, respectively, and at least one actuator, by which the coupling can be actuated to couple and uncouple the input shaft and the output shaft with and from each other, wherein in the uncoupled state, the output shaft is independently rotatable relative to the input shaft in such a manner that a steer-by-wire drive controllable by a control unit is provided.