A three wheeled vehicle (1) has a front section (10) having a front frame (105), a directionally controllable front wheel (101) and a steering column (104) with a handlebar (1040). A rear section (11) has a rear frame (107) and two rear wheels (102,103). The front section (10) of the vehicle is pivo
A three wheeled vehicle (1) has a front section (10) having a front frame (105), a directionally controllable front wheel (101) and a steering column (104) with a handlebar (1040). A rear section (11) has a rear frame (107) and two rear wheels (102,103). The front section (10) of the vehicle is pivotable about a pivot axis (111) located intermediate the two rear wheels (102,103). The pivot axis (111) includes a pivot bar (401) and a pivot bar housing (402) in communication with a transmission mechanism having a first and second gear pairs (2) (3). The transmission mechanism is releasably connected to the steering column (104) and is capable of pivoting the first section (10) about the pivot axis (111) towards the center-of-curvature of a turn in accordance with the angle of the front wheel (101), thus providing greater stability for the vehicle (1) during a turn.
대표청구항▼
What is claimed is: 1. A vehicle with three wheels, the vehicle comprising a front section and a rear section, the vehicle being suitable for travelling with the front section leading and the front section being suitable to accommodate at least one rider, and wherein the front section comprises a f
What is claimed is: 1. A vehicle with three wheels, the vehicle comprising a front section and a rear section, the vehicle being suitable for travelling with the front section leading and the front section being suitable to accommodate at least one rider, and wherein the front section comprises a front frame, a directionally controllable front wheel and an operating means for controlling said front wheel, and the rear section comprises a rear frame and two rear wheels, the rear wheels being spaced apart from each other, the front section of the vehicle being pivotable with respect to the rear section about a pivot axis, the pivot axis being located intermediate the two rear wheels and the pivot axis extending from the rear section towards the front section at an acute angle to the ground, said pivot axis being provided by a pivot means arranged between the front section and the rear section, the pivot means being in communication with a transmission mechanism, the transmission mechanism being releasably connected to the operating means and the transmission mechanism being capable of pivoting the front section about the pivot axis towards the center of the curvature of a turn in accordance with an angle of turn of the front wheel, thus providing greater stability for the vehicle during a turn while the rear section remains in an unchanged position, and wherein a biasing means is provided between the front section and the rear section, the biasing means being operable to assist in returning of the front section of the vehicle into an upright position. 2. A vehicle as claimed in claim 1 wherein the pivot means comprise a pivot bar rotatable within a housing. 3. A vehicle as claimed in claim 2 wherein the pivot bar is fixedly coupled with the front frame and the housing is fixedly coupled with the rear frame. 4. A vehicle as claimed in claim 1 wherein the pivot means are located at an angle to the ground so that the pivot axis extends towards the front wheel and meets a point on the front wheel at which the front wheel touches the ground. 5. A vehicle as claimed in claim 1 wherein the transmission mechanism comprises a connecting shaft extending between the operating means and the rear frame, the transmission means further comprising a first gear pair, said first gear pair arranged between the operating means and the front end of the connecting shaft, the transmission mechanism further comprising a second gear pair, said second gear pair arranged between the rear end of the connecting shall and the rear frame. 6. A vehicle as claimed in claim 1 wherein the operating means comprise a substantially vertical steering column, the steering column being turnable about its longitudinal axis by a handlebar and the steering column being connected to the front wheel so that turning of the steering column results in the front wheel turning in the same direction by a corresponding angle. 7. A vehicle as claimed in claim 6 wherein a connecting shaft is mounted on the front frame by means of at least one support member in which the support member of the connecting shalt is rotatable about its longitudinal axis. 8. A vehicle as claimed in claim 7 wherein the connecting shaft comprises a front portion and a rear portion, and wherein a first gear pair comprises a front gear rigidly coupled with the steering column and a front pinion rigidly coupled with the front portion of the connecting shaft, and wherein a second gear pair comprises a rear gear rigidly coupled with the rear frame and a rear pinion rigidly coupled with the rear portion of the connecting shaft. 9. A vehicle as claimed in claim 6 wherein the rear gear comprises an arcuate cogged surface, said arcuate cogged surface having a central axis, said central axis coinciding with the pivot axis of the vehicle. 10. A vehicle as claimed in claim 1 wherein a release mechanism is provided in the transmission mechanism, the release mechanism being operable to disconnect the transmission mechanism from the operating means thereby preventing the front section from being pivoted about the pivot axis towards the centre of the curvature of the turn in accordance with the angle of turn of the front wheel, the release mechanism being further operable to re-establish the connection between the transmission means and the operating means. 11. A vehicle as claimed in claim 9 wherein the release mechanism is capable of providing an intermediate mode of operation forte vehicle in which the at least one rider can use his body weight for pivoting the front section about the pivot axis. 12. A vehicle as claimed in claim 1 wherein the biasing means is a spring mechanism comprising at least one spring extending between a driver's seat and the rear frame.
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이 특허에 인용된 특허 (20)
Lofgren Michael (20589 SW. Elkhorn Ct. Tualatin OR 97062) Stewart Brian (20589 SW. Elkhorn Ct. Tualatin OR 97062), Hand propulsion and steering dampening for three-wheel vehicle.
Van Den Brink Christopher Ralph,NLX ; Van Den Brink Anthonie,NLX ; Kroonen Hendrik Marinus,NLX, Self-stabilizing, directionally controllable vehicle with at least three wheels.
Lofgren Michael S. (20589 SW. Elk Horn Ct. Tualatin OR 97062) Stewart Brian C. (20589 SW. Elk Horn Ct. Tualatin OR 97062), Steering method and mechanism for three-wheel vehicle.
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