An axle assembly for a vehicle. A movable housing is movably positioned within a closed channel defined by a central housing. The movable housing moves the axle assembly between a retracted configuration and an extended configuration. A mounting assembly may be coupled to and spaced from the movable housing and slidably positioned adjacent the central housing. A steering actuator is coupled to a steering arm and the mounting assembly such that the steering actuator moves as a unit. A track assist bracket may be fixedly coupled to the central housing and define a gap sized to slidably receive a mounting plate of the mounting assembly. A bushing may be disposed on each wall of a telescoping portion of the movable housing. A bellows may be provided to enclose exposed portions of the bushings in the extended configuration. Methods of adjusting the track of the axle assembly are also disclosed.

A radio-controlled vehicle having a frame, a left undercarriage and a right undercarriage; wherein the frame has a front guide and a rear guide, each configured to house a respective cylinder; each undercarriage having a front slide and a rear slide, which are connected in a sliding manner to the front guide and to the rear guide, respectively; wherein each cylinder is configured to selectively vary the distance between the longitudinal axis of the frame and the longitudinal axis of each undercarriage; wherein each undercarriage comprises an anti-derailment plate.

An extendable axle with wheels on a common centerline preferably includes a base housing, a left axle device, a right axle device, a left extension cylinder and a right extension cylinder. The left axle device slides into a left side of the base housing and the right axle device slides into a right side of the base housing. The left axle device preferably includes a base tube, a steering knuckle, a drive motor and a steering cylinder. The steering knuckle is pivotally engaged with an end of the base tube. The drive motor is retained on the steering knuckle. The steering cylinder pivots the steering knuckle. The right axle device is the left axle device rotated 180 degrees. The left extension cylinder extends the left axle device. The right extension cylinder extends the right axle device. The left drive motor and the right drive motor are on the same centerline.

A telescoping axle includes an elongated center tubular base axle section for supporting a farm implement and receiving in telescopic relation an elongated tubular outer axle section which receives in telescopic relation an elongated tubular inner axle section. Each axle section is preferably rectangular or square in cross section with the outer and inner axle sections each supporting a horizontal wheel axle. An elongated actuator connects the inner axle section to the outer axle section for moving the inner axle section and outer axle section between a retracted position within the base axle section and an extended position projecting from opposite ends of the base axle section. The axis of each axle is preferably above the base axle section, additional axle sections may be used and the axles may be made steerable.

A wheel-mounting assembly for a utility vehicle includes a chassis and a wheel support assembly mounted to respective outboard ends of first and second telescopic axle assemblies. The first and second telescopic axle assemblies are laterally spaced from one another and are each secured to the chassis. The first and second telescopic axle assemblies each include a respective actuator arranged to control extension and retraction thereof for steering and track-width control.

A wheel-mounting assembly for a utility vehicle includes a chassis and a wheel support assembly mounted to respective outboard ends of first and second telescopic axle assemblies. The first and second telescopic axle assemblies are laterally spaced from one another and are each secured to the chassis. The first and second telescopic axle assemblies each include a respective actuator arranged to control extension and retraction thereof for steering and track-width control.

A combine harvester with a variable length wheelbase. For example, a combine harvester may have a chassis defining a forward end and a rear end, a feeder house at the forward end of the chassis, a first set of ground-engaging elements supporting the forward end of the chassis, and a second set of ground-engaging elements supporting the rear end of the chassis. The second set of ground-engaging elements are configured to move forward and rearward relative to the chassis.

A towed or semi-mounted agricultural machine having a chassis on which an axle device connecting two wheels to the chassis is mounted, this axle device being provided with at least one movable part and one fixed part in such a way that the spacing between the wheels can be modified, at least one of the wheels being integral with a movable part that is connected slidingly along a longitudinal axis to the fixed part, which is integral with the chassis. Each movable part is additionally connected mechanically to the chassis by a respective articulated link, which is articulated on the one hand with the movable part by a first articulation and on the other hand with the chassis by a second articulation.

A system to simultaneously adjust a wheel track axle width and a steering angle of an agricultural vehicle made of: an at least two variable axle assemblies, each one of the variable axle assemblies connected to a wheel set of the agricultural vehicle is provided. During the wheel track axle adjustment process of a variable wheel track axle machine the angle of each wheel is “toed-in” or toed-our depending on wheel track extension or retraction. When the wheel track axle of the machine is being extended, all wheels are commanded to “toe-out” 3 degrees to aid in the extension and reduce external forces on the wheel and axle system. When the wheel track axle of the machine is being retracted, all wheels are commanded to “toe-out” 3 degrees to aid in the retraction and reduce external forces on the wheel and axle system. Once the wheel track axle adjustment is complete all wheels return to 0 degrees for normal operation.

An extendable axle with wheels on a common centerline preferably includes a base housing, a left axle device, a right axle device, a left extension cylinder and a right extension cylinder. The left axle device slides into a left side of the base housing and the right axle device slides into a right side of the base housing. The left axle device preferably includes a base tube, a steering knuckle, a drive motor and a steering cylinder. The steering knuckle is pivotally engaged with an end of the base tube. The drive motor is retained on the steering knuckle. The steering cylinder pivots the steering knuckle. The right axle device is the left axle device rotated 180 degrees. The left extension cylinder extends the left axle device. The right extension cylinder extends the right axle device. The left drive motor and the right drive motor are on the same centerline.