Development of Wheelchair-Lift Prototype for Transit Buses
Publication: Journal of Transportation Engineering
Volume 121, Issue 2
Abstract
This paper describes the concept, design, and prototype fabrication of an innovative four-bar mechanism-based wheelchair-lift system, which can allow a wheelchair-, scooter-, or walker-bound passenger to be lifted from ground level to the bus floor level and back again. The new lift is designed to accommodate a passenger service load of 3,300 N (750 lbf). It has relatively few components. It consists of two four-bar mechanisms, a platform, and two hydraulic actuators to raise, lower, fold, and unfold the platform. The use of restraining pins enables the lift platform to pivot normal to the ground for stowage. When stowed away, it folds into a very compact space. The lift is designed with safety, human comfort, and ride stability in mind. Under full load conditions, the angular deflection of the lift platform is 0.8°, as opposed to nearly 3° in existing lifts. The lift provides a very smooth ride to the passenger, without any uncomfortable jerking or vibrations. The device represents a sound alternative to existing lifts.
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References
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“Americans with disabilities act, (public law 101-336, 104 statute 370).” (1991). Federal Register, 56(No. 173; September 6), 45530–45778.
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“Baseline advance design transit coach specifications.” (1977). Rep., American Public Transit Association, Urban Mass Transp. Administration (UMTA), Tech. Assistance Program, Washington, D.C.
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“Guideline specifications for lifts.” (1987). Nat. Workshop on Bus Wheelchair Accessibility ; USDOT Rep. No. UMTA-IT06-0322-87, Urban Mass Transp. Administration (UMTA), Tech. Assistance Program, Washington, D.C.
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Khasnabis, S., and Aktan, H. (1991). “Preliminary investigation of the design, operation, and maintenance of wheelchair lifts.”Rep., Wayne State Univ., Detroit, Mich.
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Copyright © 1995 American Society of Civil Engineers.
History
Published online: Mar 1, 1995
Published in print: Mar 1995
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