Provided is a damper device enabling to exert stable vibration damping performance over a wide range of rotational speed regardless of environmental changes. A damper device attached to a rotating shaft to suppress amplitude at resonance of the rotating shaft, includes: a damper housing formed annularly and concentrically with the rotating shaft; a plurality of mass bodies annularly arranged around the rotation shaft inside of the damper housing and configured to be movable in the diameter direction by centrifugal force; an annular elastic body, formed of a circular spring-shaped elastic body abutting on the outside of the plurality of the mass bodies, so as to bias the mass body inward; and a biasing member, being a leaf spring-shaped elastic body abutting on the outside of the annular elastic body, so as to bias the annular elastic body inward.

An embodiment driving module includes a drive unit including a wheel and a drive motor configured to operate the wheel, a suspension unit having a first side coupled to the drive unit, and a steering unit configured to steer the wheel and having a side coupled to a second side of the suspension unit.

Vehicles may be composed of a relatively few number of “modules” that are assembled together during a final assembly process. An example vehicle may include a body module, a first drive module coupled to a first end of the body module, and a second drive module coupled to a second end of the body module. One or both of the drive modules may include a pair of wheels, a battery, an electric drive motor, and/or a heating ventilation and air conditioning (HVAC) system. One or both of the drive modules may also include a crash structure to absorb impacts. If a component of a drive module fails or is damaged, the drive module can be quickly and easily replaced with a new drive module, minimizing vehicle down time.

Vehicles may be composed of a relatively few number of “modules” that are assembled together during a final assembly process. An example vehicle may include a body module, a first drive module coupled to a first end of the body module, and a second drive module coupled to a second end of the body module. One or both of the drive modules may include a pair of wheels, a battery, an electric drive motor, and/or a heating ventilation and air conditioning (HVAC) system. One or both of the drive modules may also include a crash structure to absorb impacts. If a component of a drive module fails or is damaged, the drive module can be quickly and easily replaced with a new drive module, minimizing vehicle down time.

The invention proposes a method of supplying with hydraulic fluid a hydraulic motor (2) of a drive wheel supporting a vehicle by means of a cylinder-type suspension system (1). The hydraulic fluid passes through a feed duct (25) extending longitudinally through a cylinder (3) of the cylinder-type suspension system (1). The invention also relates to the use thereof in order to eliminate the need for hoses.

A work vehicle including an articulated vehicle chassis having a front frame portion and a rear frame portion pivotally coupled together at a generally vertical pivot axis. The front frame portion carries a front axle and the rear frame portion carries a rear axle. A steering system includes at least one steering cylinder connected between the front frame portion and the rear frame portion. A power plant provides motive power to the work vehicle, and a transmission receives power from the power plant and provides power to the front axle and rear axle. The work vehicle further includes a secondary clutch interconnected between the transmission and the rear axle. The steering system is configured to disengage the secondary clutch to provide reactive steering, whereby the front frame portion tows the rear frame portion. The rear frame portion freely articulates relative to the front frame portion.

A work vehicle including an articulated vehicle chassis having a front frame portion and a rear frame portion pivotally coupled together at a generally vertical pivot axis. The front frame portion carries a front axle and the rear frame portion carries a rear axle. A steering system includes at least one steering cylinder connected between the front frame portion and the rear frame portion. A power plant provides motive power to the work vehicle, and a transmission receives power from the power plant and provides power to the front axle and rear axle. The work vehicle further includes a secondary clutch interconnected between the transmission and the rear axle. The steering system is configured to disengage the secondary clutch to provide reactive steering, whereby the front frame portion tows the rear frame portion. The rear frame portion freely articulates relative to the front frame portion.

A leading-edge steering system is provided for a front suspension of an off-road vehicle. The leading-edge steering system is comprised of a spindle assembly that supports a drive axle assembly to conduct torque from a transaxle to a front wheel. A first rod-end joint pivotally couples an upper suspension arm and the spindle assembly, and a second rod-end joint pivotally couples a lower suspension arm and the spindle assembly. A steering rod-end joint pivotally couples a first end of a steering rod with a leading-edge portion of the spindle assembly. A steering gear is coupled with a second end of the steering rod and configured to move the steering rod, such that the spindle assembly rotates with respect to the upper and lower suspension arms. The leading-edge portion is configured to exert primarily tensile forces on the steering rod during travel over rough terrain.

The power transmission device includes an internal-combustion engine 25, a drive-source-side shaft, a flywheel 30 provided on the drive-source-side shaft 2, a speed changer 10, which has an input shaft and an output, and clutches C1 and C2 capable of releasably transmitting the power between the drive-source-side shaft 2 and the input shaft, wherein the internal-combustion engine 25 and the speed changer 10 are disposed in the traveling direction of the vehicle. A differential gear mechanism 101 and a drive shaft 201, which are positioned between the flywheel 30 and the clutches C1 and C2 so as to be orthogonal to the drive-source-side shaft 2 and which transmit the power output from the speed changer 10 to left and right drive wheels RW, are provided. The drive shaft 201 is disposed above the central axis of rotation of the drive-source-side shaft 2.

The power transmission device includes an internal-combustion engine 25, a drive-source-side shaft, a flywheel 30 provided on the drive-source-side shaft 2, a speed changer 10, which has an input shaft and an output, and clutches C1 and C2 capable of releasably transmitting the power between the drive-source-side shaft 2 and the input shaft, wherein the internal-combustion engine 25 and the speed changer 10 are disposed in the traveling direction of the vehicle. A differential gear mechanism 101 and a drive shaft 201, which are positioned between the flywheel 30 and the clutches C1 and C2 so as to be orthogonal to the drive-source-side shaft 2 and which transmit the power output from the speed changer 10 to left and right drive wheels RW, are provided. The drive shaft 201 is disposed above the central axis of rotation of the drive-source-side shaft 2.