초록 ▼

A rolling device comprises a wheel pair, consisting of two wheels ( 3 a , 3 b )affixed to wheel-holders ( 4 a , 4 b ), which are interconnected by two cross-guides ( 5, 6 ) thus forming a parallelogram link chain. One cross-guide ( 5 ) is rotatably secured to extension of the platform prov

A rolling device comprises a wheel pair, consisting of two wheels ( 3 a , 3 b )affixed to wheel-holders ( 4 a , 4 b ), which are interconnected by two cross-guides ( 5, 6 ) thus forming a parallelogram link chain. One cross-guide ( 5 ) is rotatably secured to extension of the platform providing an acute angle between a rotation axis ( 9 a ) and the pivot axes ( 7 a , 7 b , 7 c , 7 d ) of the four links which constitute the parallelogram link chain. The second cross-guide ( 6 ) is secured at the platform extension using a universal joint. One such tilt-steering wheel pair mechanism together with at least one fixed wheel is attached at opposite ends of the rolling device to make it work.

대표청구항 ▼

1. A tilt-steered rolling device, comprising a platform which includes at least one extension, and comprising at least three wheels, two of them being arranged side by side as a wheel pair, the wheels of the wheel pair each being rotatably affixed to a separate wheel holder using axles, the two whee

1. A tilt-steered rolling device, comprising a platform which includes at least one extension, and comprising at least three wheels, two of them being arranged side by side as a wheel pair, the wheels of the wheel pair each being rotatably affixed to a separate wheel holder using axles, the two wheel holders being interconnected by two cross-guides using at least four pivot links forming a trapezium or a parallelogram link chain, wherein the first cross-guide is rotatably secured to at least one extension of the platform and the second cross-guide is jointed to at least one extension of the platform, and wherein the direction of the rotation axis of the first cross-guide is at an acute angle α to the direction of four pivot axes of the at least four links of the link chain. 2. A device as defined in claim 1, wherein each axle of the two wheels of the wheel pair is attached only to one side of the respective wheel holder. 3. A device as defined in claim 1, wherein the pivot axes of the first cross-guide are separated by a distance which is equal to the distance between the pivot axes of the second cross-guide. 4. A device as defined in claim 1, wherein the distance between the two pivot axes of the first cross-guide and the distance between the two pivot axes of the second cross-guide are both equal to the track width of the two wheels of the wheel pair. 5. A device as defined in claim 1, wherein the second cross-guide is rotatably secured to at least one extension of the platform wherein the rotation axis of the second cross-guide is directed parallel to the rotation axis of the first cross-guide. 6. A device as defined in claim 1, wherein two universal joints are used to allow the first cross-guide to rotate around a rotation axis where the rotation axis is defined by the centers of the two universal joints. 7. A device as defined in claim 1, wherein an intersection point (K) which is generated when the middle parallel line between the two upper pivot axes of the parallelogram link chain intersects with the rotation axis of the first cross-guide, is located vertically above the axles of the wheels of the wheel pair. 8. A device as defined in claim 7, wherein the intersection point (K) is located vertically above the axes of the wheels of the wheel pair. 9. A device as defined in claim 8, wherein the swivel axis which is defined by the centers of the two universal joints of the first cross-guide lies in the plane which extends along the central longitudinal axis of the platform and which is also oriented perpendicular to the platform. 10. A device as defined in claim 1, wherein a flexing means is comprised which forces the wheel pair to return from the tilt or which maintains it in a preferred neutral position. 11. A device as defined in claim 1, wherein a single wheel is rotatably affixed at one end of the device. 12. A device as defined in claim 1, wherein the device has tilt-steering wheel pairs at both ends. 13. A device as defined in claim 1, wherein an extension supporting a tilt-steering wheel pair is fixed flexibly to the platform at one point, to permit small movements of the wheel pair essentially vertically to the platform, and to allow inclusion of a shock absorbing device. 14. A device as defined in claim 1, wherein the device has one tilt-steered wheel pair and one wheel pair in-lines at opposite ends.