초록 ▼

A controllable, motor-driven undercarriage which comprises a first frame having non-driven castors and a second frame carrying driving wheels. The second frame can be turned relative to the first frame for changing the direction of the driving wheels and can be locked in any position relative to the

A controllable, motor-driven undercarriage which comprises a first frame having non-driven castors and a second frame carrying driving wheels. The second frame can be turned relative to the first frame for changing the direction of the driving wheels and can be locked in any position relative to the first frame. The second frame is a two-armed lever which is pivotable about a central axis and at either end carries a driving wheel which is provided with an independently controllable driving means. The independently controllable driving-wheels are used both for the driving and steering of the undercarriage and for swinging the lever between different locked positions.

대표청구항 ▼

A controllable, motor-driven undercarriage, comprising a first load-carrying frame having freely rotatable supporting wheels and a second frame having traction wheels, said frames being mounted about a vertical center axis for relative rotary motion with respect to one another, said second frame is

A controllable, motor-driven undercarriage, comprising a first load-carrying frame having freely rotatable supporting wheels and a second frame having traction wheels, said frames being mounted about a vertical center axis for relative rotary motion with respect to one another, said second frame is a two-armed lever which at each end carries a traction wheel and an independently controllable driving means connected to each said traction wheel, and locking means for selectively locking said first frame and said two-armed lever relative to one another in various lockable rotatable positions about said vertical center axis.