A vehicle suspension system may include a first suspension assembly operably coupling a first wheel to a chassis of a vehicle, a second suspension assembly operably coupling a second wheel to the chassis where the first and second wheels form a pair of front wheels, a third suspension assembly operably coupling a third wheel to the chassis, a fourth suspension assembly operably coupling a fourth wheel to the chassis where the third and fourth wheels forming a first pair of rear wheels, and a payload extension kit that is attachable to the chassis non-permanently. The payload extension kit may include a fifth suspension assembly operably coupling a fifth wheel to a sub-frame extension of the payload extension kit, and a sixth suspension assembly operably coupling a sixth wheel to the sub-frame extension, where the fifth and sixth wheels form a second pair of rear wheels.

Cross-linked vehicle suspension systems. A first wheel is mechanically linked to a second wheel by a cross tie, so that motion from an impact with an obstacle by the first wheel is transmitted to the second wheel. A shock absorber may be coupled to each wheel, the cross tie, or both, to distribute absorption of the impact. In some embodiments, a second pair of wheels may be coupled by a second cross tie and configured diagonally to the first pair of wheels. A shock absorber may be coupled to both cross ties to link all wheels together, for full distribution of all loads across all wheels.

A vehicle suspension for supporting the body or chassis of a vehicle includes suspension arms positioned at opposite sides and at one end of a vehicle and two suspension arms positioned respectively at opposite sides and at one end of a vehicle, each arm mounted for pivotal movement about a respective hinge axis. A balancing hub is attached to the vehicle body or chassis with at least one part of the hub free to rotate relative to the vehicle body or chassis about at least one pivotal position. Each suspension arm is connected to the hub at a position of the suspension arm spaced from a respective hinge axis whereby pivotal movement of the suspension arm applies a force to the hub. In use, the force opposes the force from another suspension arm at at least one of the same side and the same end of the vehicle suspension.

Embodiments of a suspension for a vehicle is provided. The suspension includes, for example, a frame and a locking assembly. The locking assembly inhibits tipping of a frame of the vehicle when tipping of the frame is detected.

Embodiments of a suspension for a vehicle is provided. The suspension includes, for example, a frame and a locking assembly. The locking assembly inhibits tipping of a frame of the vehicle when tipping of the frame is detected.

A vehicle suspension for supporting the body or chassis of a vehicle includes suspension arms positioned at opposite sides and at one end of a vehicle and two suspension arms positioned respectively at opposite sides and at one end of a vehicle, each arm mounted for pivotal movement about a respective hinge axis. A balancing hub is attached to the vehicle body or chassis with at least one part of the hub free to rotate relative to the vehicle body or chassis about at least one pivotal position. Each suspension arm is connected to the hub at a position of the suspension arm spaced from a respective hinge axis whereby pivotal movement of the suspension arm applies a force to the hub. In use, the force opposes the force from another suspension arm at at least one of the same side and the same end of the vehicle suspension.

Embodiments of a suspension for a vehicle is provided. The suspension includes, for example, a frame and a locking assembly. The locking assembly inhibits tipping of a frame of the vehicle when tipping of the frame is detected.

Embodiments of a suspension for a vehicle is provided. The suspension includes, for example, a frame and a locking assembly. The locking assembly inhibits tipping of a frame of the vehicle when tipping of the frame is detected.

Cross-linked vehicle suspension systems are disclosed. A first wheel is mechanically linked to a second wheel by a cross tie, so that motion from an impact with an obstacle by the first wheel is transmitted to the second wheel. A shock absorber may be coupled to each wheel, the cross tie, or both, to distribute absorption of the impact. In some embodiments, a second pair of wheels may be coupled by a second cross tie and configured diagonally to the first pair of wheels. A shock absorber may be coupled to both cross ties to link all wheels together, for full distribution of all loads across all wheels.

A drive unit of a robotic vehicle including a top surface having a mounting interface to interchangeably couple with multiple different modular payload structures configured to transport items in a facility, workspace or inventory management environment. The mounting interface is configured to securely engage with a mounting portion of the variety of different payload structures to enable a versatile exchange of the payload structure for different conveyance applications. The drive unit includes an electrical interface to communicatively couple with the modular payload structures. The drive unit is configured to use data communicated via the electrical coupling and interface to identify a type of modular payload structure that is mechanically coupled to the mounting interface and implement a motion profile (e.g., speed and acceleration parameters) associated with the identified modular payload structure.