A mobile robot configured to drive on a surface with irregularities, comprising: a chassis having a front end facing a forward direction of travel, a back end, a first side, and a second side. There is a first drive wheel rigidly affixed to the chassis proximate the first side and interconnected to a motor to propel it. There is a second drive wheel rigidly affixed to the chassis proximate the second side and interconnected to a motor to propel it. A first caster assembly is rigidly affixed to the chassis proximate the front end and includes a first caster wheel configured to rotate about a first swivel axis. A second caster assembly is rigidly affixed to the chassis proximate the back end and includes a second caster wheel configured to rotate about a second swivel axis and it includes a compliant member to absorb the irregularities.

A mobile robot configured to drive on a surface with irregularities, comprising: a chassis having a front end facing a forward direction of travel, a back end, a first side, and a second side. There is a first drive wheel rigidly affixed to the chassis proximate the first side and interconnected to a motor to propel it. There is a second drive wheel rigidly affixed to the chassis proximate the second side and interconnected to a motor to propel it. A first caster assembly is rigidly affixed to the chassis proximate the front end and includes a first caster wheel configured to rotate about a first swivel axis. A second caster assembly is rigidly affixed to the chassis proximate the back end and includes a second caster wheel configured to rotate about a second swivel axis and it includes a compliant member to absorb the irregularities.

According to some embodiments, an improved tugger and rider cart assembly system is presented. The system comprising a tugger cart with a central space to receive a rider cart; the tugger cart having both front side and rear side pluralities of transport wheels approximately parallel to, but not touching, ground; a front side and a rear side loading wheel positioned closer to the ground than the transport wheels; a rider cart having a first wing and a second wing, both wings having a curved portion; and wherein the loading wheels and wing curved portions can be operatively connected to allow a user to move the rider cart onto the tugger cart thereby allowing the tugger cart to transport the rider cart.

A mobile drive unit includes a pivot between the front chassis unit and the rear chassis unit, thereby diminishing the total height of the unit.

A mobile drive unit includes a pivot between the front chassis unit and the rear chassis unit, thereby diminishing the total height of the unit.

The present disclosure provides a chassis comprising a frame, two hanging units symmetrically provided at both sides of the frame, and a front guiding wheel and a rear universal wheel provided below the frame, wherein each of the hanging units comprises a mounting rack fixedly connected to the frame, a hanging rack slidably connected to the mounting rack, and a driving wheel rotatably connected to the hanging rack, and the front guiding wheel is provided with a first driving motor, and the driving wheel of each hanging unit is driven by a second driving motor, and wherein a closed loop speed control system is formed between the first driving motor and both second driving motors, such that a rotational angle of the front guiding wheel is adjustable via the first driving motor when revolving speeds of both second driving motors are changed.

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.

A material handling vehicle comprising: a chassis, comprising an upper surface arranged on a first loading surface, a plurality of components coupled thereto, including; a power source, a drive motor, at least one drive wheel powered by the drive motor, at least one stabilizing wheel, at least one object sensor for detecting objects in the vehicle surroundings, a wireless interface for communication with other system units, a control unit, and a navigation device. The chassis further comprises at least one opening, arranged at a lowermost portion of the chassis, and extending from a first side portion of the chassis. The one opening arranged to receive a material handling element, and comprises an upper abutment surface and sidewalls, extending along the extension of each opening. A material handling system comprises a group of material handling vehicles, the group comprises at least one of the vehicles and at least one forklift truck.

A material handling vehicle comprising: a chassis, comprising an upper surface arranged on a first loading surface, a plurality of components coupled thereto, including; a power source, a drive motor, at least one drive wheel powered by the drive motor, at least one stabilizing wheel, at least one object sensor for detecting objects in the vehicle surroundings, a wireless interface for communication with other system units, a control unit, and a navigation device. The chassis further comprises at least one opening, arranged at a lowermost portion of the chassis, and extending from a first side portion of the chassis. The one opening arranged to receive a material handling element, and comprises an upper abutment surface and sidewalls, extending along the extension of each opening. A material handling system comprises a group of material handling vehicles, the group comprises at least one of the vehicles and at least one forklift truck.

An automated guided trolley for transporting and/or handling a load. The trolley has a main frame for receiving the load and a supporting frame having two walking beams extending respectively towards the front and the rear of the trolley. The walking beams are mounted rotatably with respect to the main frame respectively about a first axis and a second axis and such a walking beam includes elements for securing one arm of one walking beam to one arm of the other walking beam and for supporting the first of these arms on the other arm.