A vehicle suspension having a first load-bearing component assembly and a second load-bearing component assembly. The first and second load bearing component assemblies are adapted to be transversely positioned across from each other on a vehicle chassis. A directionally-dependent heave spring assembly is adapted to be transversely secured to a vehicle chassis, the heave spring assembly is coupled to the first load-bearing component assembly and to the second load-bearing component assembly and exhibits resiliency in opposition to upward vertical movement of both wheel hub assemblies relative to their rest states, and exhibits substantially no resiliency in opposition to downward vertical movement of both wheel assemblies relative to their rest states.

A work vehicle includes a chassis, a prime mover configured to move the chassis along a ground surface, and a suspension assembly that couples a wheel to the chassis. The suspension assembly includes a knuckle coupled to the wheel, a first suspension arm, and a suspension cylinder. The first suspension arm includes a first portion rotatably coupled to the chassis and a second portion extending away from the first portion and coupled to the knuckle. The suspension cylinder is rotatably coupled to the chassis and to a second suspension arm. The first suspension arm and the suspension cylinder are each configured to pivot relative to the chassis about a common pivot axis.

A retractable wheel and/or track drive assembly for an amphibian comprising an actuator, a retraction linkage assembly movable between a protracted position and a retracted position, a suspension assembly at least partially connected to the retraction linkage assembly and movable between a protracted position and a retracted position, and at least one wheel and/or track drive, wherein when the retraction linkage assembly and the suspension assembly are protracted then the retraction linkage and/or suspension assembly supports and/or holds at least one wheel and/or track drive in a ground engaging position for use on land.

A retractable wheel and/or track drive assembly for an amphibian comprising an actuator, a retraction linkage assembly movable between a protracted position and a retracted position, a suspension assembly at least partially connected to the retraction linkage assembly and movable between a protracted position and a retracted position, and at least one wheel and/or track drive, wherein when the retraction linkage assembly and the suspension assembly are protracted then the retraction linkage and/or suspension assembly supports and/or holds at least one wheel and/or track drive in a ground engaging position for use on land.

Provided is a vehicular suspension device that achieves both of improvement in driving stability and improvement in vehicle movement performance. The vehicular suspension device includes a suspension capable of adjusting a roll center height by control of an actuator, and a roll center controller. The controller includes a traveling state corresponding height determination unit configured to determine the roll center height of the suspension in accordance with a predetermined rule on the basis of vehicle speed information and road surface information, and an actuator controller configured to control the actuator so that the roll center height reaches the roll center height determined by the unit.

Provided is a vehicular suspension device that achieves both of improvement in driving stability and improvement in vehicle movement performance. The vehicular suspension device includes a suspension capable of adjusting a roll center height by control of an actuator, and a roll center controller. The controller includes a traveling state corresponding height determination unit configured to determine the roll center height of the suspension in accordance with a predetermined rule on the basis of vehicle speed information and road surface information, and an actuator controller configured to control the actuator so that the roll center height reaches the roll center height determined by the unit.

Vehicle platforms, and systems, subsystems, and components thereof are described. A self-contained vehicle platform or chassis incorporating substantially all of the functional systems, subsystems and components (e.g., mechanical, electrical, structural, etc.) necessary for an operative vehicle. Functional components may include at least energy storage/conversion, propulsion, suspension and wheels, steering, crash protection, and braking systems. Functional components are standardized such that vehicle platforms may be interconnected with a variety of vehicle body designs (also referred to in the art as “top hats”) with minimal or no modification to the functional linkages (e.g., mechanical, structural, electrical, etc.) therebetween. Configurations of functional components are incorporated within the vehicle platform such that there is minimal or no physical overlap between the functional components and the area defined by the vehicle body. Specific functional components of such vehicle platforms, and the relative placement of the various functional components, to allow for implementation of a self-contained vehicle platform are also provided.

A vehicle suspension cage is provided and more particularly a dirt track racing rear axle birdcage style cage having features facilitating rapid suspension tuning and adjustment typically experienced during competitive events to accommodate varying track and handling conditions. A particular advantage is that adjustment of the suspension cage is accomplished without unloading the suspension thereby eliminating lifting the vehicle off the ground or removing the vehicle weight from the suspension. A four-link dirt modified suspension cage configuration embodiment and method of adjustment is provided; however, the suspension cage is adaptable to a variety of configurations and embodiments.

A vehicle suspension cage is provided and more particularly a dirt track racing rear axle birdcage style cage having features facilitating rapid suspension tuning and adjustment typically experienced during competitive events to accommodate varying track and handling conditions. A particular advantage is that adjustment of the suspension cage is accomplished without unloading the suspension thereby eliminating lifting the vehicle off the ground or removing the vehicle weight from the suspension. A four-link dirt modified suspension cage configuration embodiment and method of adjustment is provided; however, the suspension cage is adaptable to a variety of configurations and embodiments.

An extension-retraction link includes: a stationary shaft having a tubular shape; a first universal joint that connects the stationary shaft to a vehicle body side member; a movable shaft that can slide with respect to the stationary shaft; a second universal joint that connects the movable shaft to a hub carrier; and an actuator that moves the movable shaft. The movable shaft includes: a first plane surface; a second plane surface making an angle with respect to the first plane surface; a third plane surface opposite the first plane surface; and a fourth plane surface opposite the second plane surface. The stationary shaft includes: first to fourth bushes in contact with the first to fourth plane surfaces, respectively; a first elastic member pressing the third bush to the third plane surface; and a second elastic member pressing the fourth bush to the fourth plane surface.