A trailing axle suspension system is disclosed comprising an auxiliary chassis, an axle suspension system suspending a trailing axle from the auxiliary chassis, and an auxiliary chassis system suspending the auxiliary chassis from the chassis of a motor vehicle. With the auxiliary chassis suspension system including a pair of suspension arms supporting the auxiliary chassis for pivotal movement and adapted to be pivotally connected to the motor vehicle chassis. And with the axle suspension system and auxiliary chassis suspension system adapted to cooperatively establish the auxiliary chassis and trailing axle in a stowed condition on the motor vehicle and establish the auxiliary chassis and trailing axle in a deployed condition at a location rearward of the motor vehicle chassis and then forcibly cause the auxiliary chassis to help support the motor vehicle chassis with the trailing axle. And wherein the auxiliary chassis suspension system includes a load-bearing member that is separate from the pivotal support of the auxiliary chassis rigidly joining the suspension arms and adapted to engage the auxiliary chassis in establishing the deployed condition and bear a major portion of the force causing the auxiliary chassis to help support the motor vehicle chassis with the trailing axle.

A motor-driven vehicle includes: a motor, a first rotational shaft to be driven to rotate by the motor, a clutch, a second rotational shaft to be driven to rotate by the motor via the clutch, an arm configured to rotate in association with rotation of the second rotational shaft, and at least two wheels, wherein each of the at least two wheels being attached to the arm at a position offset from a rotation center of the arm, and each of the at least two wheels being rotatable in association with rotation of the first rotational shaft.

A booster for a trailer system is provided comprising a control system in communication with a sensor(s) for determining the direction and speed of the booster when in motion. The control system comprises instructions corresponding to one or more booster operations such as: detection of a reverse state, retraction of a suspension system when the reverse state is detected; engagement of a steer axle lock when the reverse state is detected; detection of a forward state; extension of the suspension system when the forward state is detected; disengagement of the steer axle lock when the forward state is detected; detection of a high-speed forward state; engagement of the steer axle lock when the high-speed forward state is detected; detection of a low-speed forward state; and disengagement of the steer axle lock when the low-speed forward state is detected.

A motor-driven vehicle includes: a motor, a first rotational shaft to be driven to rotate by the motor, a clutch, a second rotational shaft to be driven to rotate by the motor via the clutch, an arm configured to rotate in association with rotation of the second rotational shaft, and at least two wheels, wherein each of the at least two wheels being attached to the arm at a position offset from a rotation center of the arm, and each of the at least two wheels being rotatable in association with rotation of the first rotational shaft.

A work vehicle includes a vehicle body, a plurality of traveling devices disposed on the right and left sides on the front and rear sides of the vehicle body respectively, a plurality of bending link mechanisms configured to liftably support each one of the traveling devices to the vehicle body and a plurality of drive operating devices capable of changing the posture of each one of the plurality of bending link mechanisms. The vehicle body is split into a front side body section and a rear side body section. The front side body section and the rear side body section are configured to be bendably pivotable relative to each other via a pivot interlocking mechanism.

An example method includes receiving, at a first frequency, sensor information indicative of an actual pressure level of a pilot fluid signal in a pilot line connecting an outlet port of a pilot supply valve to a pilot port of a main valve; determining an estimated pressure for the pilot fluid signal in the pilot line at a second frequency greater than the first frequency; determining a pressure estimate error based on comparing the actual pressure level to the estimated pressure; determining a pressure level error based on comparing the estimated pressure to a commanded pressure value; and operating the pilot supply valve in an open state to provide the pilot fluid signal to the pilot port of the main valve until the pressure level error is less than a threshold value.

Disclosed is a mobile articulated crane having a boom for carrying a load when the crane is stationary and while the crane is mobile. The boom has an end for engaging with a load and an opposed end. The crane further comprises a counterweight attached to the boom at or close to the opposed end of the boom. A rear body of the crane can comprise first and second rear axles, each for supporting the rear body on the ground. The first rear axle can be arranged to be displaced relative to the second rear axle such that wheels of the first rear axle selectively engage or disengage with the ground.

An autonomous mobile robot is provided. The autonomous mobile robot includes an upper module including a cargo space provided therein, and a cover, a lower module positioned under the upper module and providing a driving force, and a driving module provided in the lower module, in which the driving module includes a plurality of pairs of wheels capable of asynchronously contacting a road surface or ground so as to overcome a step or a stair.

A three-row wheel vehicle having front, center and rear wheels has laterally spaced leading arms each pivotably connected to a vehicle body, laterally spaced swing arms each connected to the front end of the leading arm swingably in the front and rear direction and rotatably supporting the front wheel at the lower end, and laterally spaced connecting links each attached at one end to the swing arm pivotably around an axis and attached at the other end to the vehicle body pivotably around another axis; heights of the axes are different when the vehicle is on a horizontal flat traveling road; and each connecting link is arranged to apply a reaction force including an upward component to the swing arm when a rearward force acts from the front wheel to the one end via the swing arm.

A spread axle assembly for a trailer has the ability to pivot about itself to achieve a storage configuration that advantageously shortens the overall length of the trailer and reduces tire wear. It also has the ability to extend between a close position in which the rear axle of the trail is proximate to its axle and one or more spread or extended positions for better distribution of a load carried by the trailer.