Land vehicles – Wheeled – Articulated vehicle
Patent
1997-06-11
1999-05-04
Hurley, Kevin
Land vehicles
Wheeled
Articulated vehicle
280 99, 280 4711, B62D 706
Patent
active
058994823
ABSTRACT:
A novel steering mode switching carriage is disclosed. A plurality of such carriages, if coupled to each other, can follow a single path without developing any discrepancy in turning radius between front and rear inner wheels when traveling on a curve. The carriage is used as a conventional cart if the front wheels are made to pivot freely and the rear wheels are fixedly aligned longitudinally. According to the present invention, a pair of pivotal shafts of the front wheels and a pair of pivotal shafts of the rear wheels are coupled by right and left parts of a reversing mechanism respectively. Each pivotal shaft is provided with an engaging member, which has a slider and a link lever extending therefrom. The front wheel is caused to pivot by the slider, and the reversing mechanism and the slider are coupled to each other by the link lever. The right and left link levers are coupled to each other by a synchronizing shaft, which is caused to pivot laterally by a steering lever whose rear end is pivotally supported at a lateral center between the front wheels. A front end of the steering lever is operatively connected to a traction bar, which disengages the engaging members from the pivotal shafts to allow pivotal movement of the front wheels. In this mode, the steering lever is fixed at a central position thereof, thus fixedly aligning the rear wheels longitudinally.
REFERENCES:
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patent: 3294417 (1966-12-01), March
patent: 3620549 (1971-11-01), Miller et al.
patent: 5704623 (1998-01-01), Chapman
Kikogaku--"Mechanism", Kyoritusyuppan Kabushikigaisya, 4 pages (1978-1992).
Catalog of "Industrial Trailer", Suehiro Industries, Ltd., Catalog No. T-4, 4 pages (printed: Sep. 1, 1995).
Hurley Kevin
Kimura Unity Co., Ltd.
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