A steering apparatus includes left and right swing arm members, left and right tie rods pivotally attached to the arm portions of the swing arm members at their inner ends, relay rods pivotally attached to the arm portions at both ends, and a steering input transmission system. Rack-and-pinion type electric power steering devices are connected to the arm portions of the left and right swing arm members. A control unit calculates correcting steering torques for reducing rotational vibrations generated in the electric power steering devices due to a disturbance, and correct target steering assist torques calculated based on a steering torque with the correcting steering torques and control the electric power steering devices with the corrected target steering assist torques.

Provided is a work vehicle in which a connection member can be prevented from coming into contact with an obstacle while the work vehicle is traveling, without restricting the layout of the work vehicle. A work vehicle in which a power steering cylinder is mounted to a front axle case, wherein in the front axle case, a support part to which the power steering cylinder is mounted by a connection member, and a protruding part that protrudes from the support part so as to conceal the connection member when viewed from the front side of the work vehicle are formed.

Provided is a work vehicle in which a connection member can be prevented from coming into contact with an obstacle while the work vehicle is traveling, without restricting the layout of the work vehicle. A work vehicle in which a power steering cylinder is mounted to a front axle case, wherein in the front axle case, a support part to which the power steering cylinder is mounted by a connection member, and a protruding part that protrudes from the support part so as to conceal the connection member when viewed from the front side of the work vehicle are formed.

One example provides a ride on air injection machine including one or more steerable wheels, a compressed air system providing compressed air, one or more air inject tines to inject compressed air from the compressed air system into the grounds, and a steering system. The steering system includes a steering wheel, a cylinder coupled to the steerable wheels, the cylinder including opposing internal chambers and being moveable to steer the steerable wheels and a control valve assembly to direct compressed air from the compressed air system to the internal chambers and to bleed compressed air from the internal chambers based on a position of the steering wheel to move the cylinder steer the steerable wheels.

A center take off rack and pinion steering system is disclosed having a rack housing which houses a rack gear having first and second ends extending through the housing. A pinion gear is coupled to the rack gear to input steering power to the rack gear. A rack yoke is coupled to, and extends between, the first and second ends of the rack gear. A yoke support is coupled to the rack housing and a yoke support slider is coupled to the rack yoke and is movable with the rack yoke relative to the yoke support. Tie rod end mounts are supported by the rack yoke, the tie rod end mounts positioned laterally intermediate the first and second ends of the rack gear.

A pneumatic steering system includes a cylinder movable in relation to a through rod, steering tie rods coupled to the cylinder, a control valve that controls motion of the cylinder in relation to the through rod, a spring-biased pivoting actuator operably coupled to a steering linkage and to a control input of the control valve. The actuator is pivotally mounted to a structure attached to the cylinder. The control valve is attached to that structure. The steering linkage is an articulated assembly that transforms rotation of the steering column into pivoting movement of the actuator.

A novel steering tube assembly is provided having a steering tube with a first end and a second end. An upper plate assembly is coupled to the first end of the steering tube and a drive gear plate is coupled to the second end of the steering tube. A bearing steering tube plate is coupled to the steering tube at a location between the first end and the second end. The bearing steering tube plate has a first surface and a second surface. A bearing support is coupled to the first surface of the bearing steering tube plate and includes a cylindrical portion and a flange portion. A bearing block is coupled to the bearing support and the bearing block comprises a low-friction, non-metallic material.

A novel steering tube assembly is provided having a steering tube with a first end and a second end. An upper plate assembly is coupled to the first end of the steering tube and a drive gear plate is coupled to the second end of the steering tube. A bearing steering tube plate is coupled to the steering tube at a location between the first end and the second end. The bearing steering tube plate has a first surface and a second surface. A bearing support is coupled to the first surface of the bearing steering tube plate and includes a cylindrical portion and a flange portion. A bearing block is coupled to the bearing support and the bearing block comprises a low-friction, non-metallic material.

A steering system (11) for a vehicle (10) includes an electromechanical steering actuator (46) and a steering linkage (37) movable depending on the steering actuator (46). The linkage (37) includes a steering rod (30) adapted to be connected in an articulated manner to the steering knuckle (22) or an articulated lever (24) of the steering knuckle (22) for moving the steering knuckle (22). The linkage (37) further comprises a bell crank (35) having a first end area (39) connected in an articulated manner to the steering rod (30) and a second end area (40) connected in an articulated manner to a vehicle frame (12) of the vehicle (10) or to the steering actuator (46). A point of application (63) of the steering actuator (46) on the steering linkage (37) is spaced apart from the second end area (40) of the bell crank (38).

A steering apparatus includes left and right swing arm members, left and right tie rods pivotally attached to the arm portions of the swing arm members at their inner ends, relay rods pivotally attached to the arm portions at both ends, and a steering input transmission system. Rack-and-pinion type electric power steering devices are connected to the arm portions of the left and right swing arm members. A control unit calculates correcting steering torques for reducing rotational vibrations generated in the electric power steering devices due to a disturbance, and correct target steering assist torques calculated based on a steering torque with the correcting steering torques and control the electric power steering devices with the corrected target steering assist torques.