A work vehicle includes a hydraulic actuator that changes an actual steering angle, an actual steering angle detecting part, an operating unit that performs a steering operation, a relative angle detecting part, a steering control part, and a position adjustment control part. The operating unit includes an operating part, a support part, a rotating part, a biasing part biasing the operating part to a predetermined position with respect to the rotating part, and a position adjusting part that adjusts the rotating part. The relative angle detecting part detects a relative rotation angle of the operating part with respect to the rotating part. The steering control part controls the hydraulic actuator based on a rotation operation of the operating part. The position adjustment control part sets a torque based on the relative rotation angle and uses the torque to control the position adjusting part based on the actual steering angle.

A work vehicle includes a hydraulic actuator that changes an actual steering angle, an actual steering angle detecting part, an operating unit that performs a steering operation, a relative angle detecting part, a steering control part, and a position adjustment control part. The operating unit includes an operating part, a support part, a rotating part, a biasing part biasing the operating part to a predetermined position with respect to the rotating part, and a position adjusting part that adjusts the rotating part. The relative angle detecting part detects a relative rotation angle of the operating part with respect to the rotating part. The steering control part controls the hydraulic actuator based on a rotation operation of the operating part. The position adjustment control part sets a torque based on the relative rotation angle and uses the torque to control the position adjusting part based on the actual steering angle.

An operation device has a first displacement portion that is displaceable by being operated by an occupant of a vehicle, and a second displacement portion that is supported at the first displacement portion and that is displaceable with respect to the first displacement portion by being operated by an occupant of the vehicle. Further, the operation device has a first locking portion and a second locking portion that, at a time when a mode of the vehicle is a first mode, permit displacement of the first displacement portion and restrict displacement of the second displacement portion with respect to the first displacement portion, and, at a time when the mode of the vehicle is a second mode, restrict displacement of the first displacement portion and permit displacement of the second displacement portion with respect to the first displacement portion.

A steering column with a switch module at least partially surrounding the steering column. The switch module includes at least one actuating lever for activating at least one function. A mechanical interface for attaching at least one bracket for an object is provided in the area of the switch module. The interface is configured as a separate component mounted on the switch module.

The inventive vehicle provides all the benefits discussed above with a frame defining an operator compartment, the operator compartment having a back section and having open sides and an open bottom. A first movable chair is attached to a motorized chair movement device which allows the chair to be moved vertically and horizontally on the back section of the operator compartment within the operator compartment. A pair of rear wheels is connected to the frame, each being driven by an electric motor. The frame has an upper section defining the top of the operator compartment and being constructed and arranged to support a solar panel. The solar panel is electrically connected to at least one battery which is connected to the frame and which provides power to the vehicle. A front caster wheel is rotatable connected to a caster wheel arm which is rotatably connected to the upper frame section. A control computer is connected to the rear wheel motors, motorized chair movement device, caster wheel arm and foot/leg rest. A plurality of operator controls are connected to the first movable chair and operably connected to the control computer for operating the vehicle.

The inventive vehicle provides all the benefits discussed above with a frame defining an operator compartment, the operator compartment having a back section and having open sides and an open bottom. A first movable chair is attached to a motorized chair movement device which allows the chair to be moved vertically and horizontally on the back section of the operator compartment within the operator compartment. A pair of rear wheels is connected to the frame, each being driven by an electric motor. The frame has an upper section defining the top of the operator compartment and being constructed and arranged to support a solar panel. The solar panel is electrically connected to at least one battery which is connected to the frame and which provides power to the vehicle. A front caster wheel is rotatable connected to a caster wheel arm which is rotatably connected to the upper frame section. A control computer is connected to the rear wheel motors, motorized chair movement device, caster wheel arm and foot/leg rest. A plurality of operator controls are connected to the first movable chair and operably connected to the control computer for operating the vehicle.

A stand-on terrain working vehicle may include a control tower coupled to a frame, a steering lever coupled to the control tower and configured to move between a first position and a second position, a blocking bar coupled to the control tower and configured to move between a blocking position and an unblocking position, where the blocking bar in the blocking position limits movement of the steering lever to movement from the first position to an intermediate position between the first and second position, and where the blocking bar in the unblocking position does not limit movement of the steering lever between the first position and the second position. A locking bar may be coupled to the blocking bar and a locking bracket may be coupled to the control tower, where the locking bar and the locking bracket may act to hold the blocking bar in a desired position.

Provided is a travel operation device for a crawler aerial work vehicle equipped with an operation panel that can be operated with one hand and that provides stable operating conditions even when swayed from side to side. A travel operation device 10 comprises an operation panel 11 that is disposed on the deck 4 of a self-propelled crawler aerial work vehicle 1 and a controller 70 that controls the rotation of a left-side motor 60a, which drives a left-side endless track, and a right-side motor 60b, which drives a right-side endless track, according to the operation of an operating stick 20 that is disposed on the operation panel 11. The operating stick 20 of the operation panel 11 is composed of: an operating stick body 21 that can be tilted only in one axial direction back and forth from the neutral position; a left-swivel switch 24; a right-swivel switch 25; and an enable switch 22 that enables the operation of the switches. The switches are arranged at positions on the operating stick body 21 where the left-swivel switch 24 and/or the right-swivel switch 25 can be operated while the enable switch 22 is pressed with fingers gripping the operating stick body 21.

A self-propelled roadway maintenance machine has an operator's station located on a front portion of the machine's chassis and including a forward-facing operator's seat. A driven implement, such as a crack routing cutter drum for routing cracks in a roadway surface, is mounted on the front portion of the chassis in a location that can be monitored by a forward-facing operator while controlling machine steering and propulsion. The implement may be removably mounted on the chassis by a quick-connect coupling. If the implement comprises a crack routing cutter drum, a plurality of peripherally spaced cutter wheel assemblies may be mounted between disks of the cutter drum, each cutter wheel assembly including a pin and first and second bushings that support the pin on the disks and that are removably inserted into respective bores in the disks. Machine steering and propulsion and implement operation may all be effected hydraulically.

A tilt structure to be provided allows the tilt of a console to be changed through simple motion and has a simple configuration. A link mechanism (a mechanism similar to a slider crank mechanism) composed of three turning pairs and one sliding pair is formed using a first frame 20, a second frame 25, a slider 37, and a connection member 30. The tilt structure includes a control member 40 or 47 for fixing or unfixing the tilt of the second frame 25. The control member 40 or 47 is provided controllably in order to lock or unlock motion of the link mechanism.