Development of wheelchair caster testing equipment and preliminary testing of caster models

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Development of wheelchair caster testing equipment and preliminary testing of caster models

BACKGROUND Because of the adverse environmental conditions present in less-resourced environments (LREs), the World Health Organization (WHO) has recommended that specialised wheelchair test methods may need to be developed to support product quality standards in these environments. A group of experts identified caster test methods as a high priority because of their common failure in LREs, and...

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Wheelchair caster shimmy and turning resistance.

The equations for wheelchair caster wheel shimmy are presented along with experimental data. The report includes the theory and performance of single wheel casters for a variety of tires, and a new design for wheelchair casters using a grooved dual-tread tire or co-rotating caster wheels. The dual-tread tire was found to significantly inhibit caster shimmy. The turning resistance due to a groov...

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Testing and evaluation of wheelchair caster assemblies subjected to dynamic crash loading.

Wheelchair designs based upon loads applied quasi-statically during normal mobility use are apt to be inadequate to handle the increased level of dynamic crash forces that may be encountered when using the wheelchair as a motor vehicle seat. The purpose of this study was to characterize the integrity of wheelchair caster assemblies under simulated crash conditions. This study utilized dynamic d...

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Assistive Caster Unit of Wheelchair for Step Climbing

Th is paper proposes the wheelchair caster unit which assists manual wheelchair users in a step climbing. Th is caster unit has 2 functions. First one is the assistive plate which en larges radius of a front wheel equivalently in the limited space between main frame and foot rest. When the caster meets the step, the assistive plates are rotated as same manner as a general big wheel. Thus, the u...

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Development of a new creep testing equipment to obtain long-term deformation parameters of salt rocks

Creep phenomenon in rock engineering plays a key role in development of underground spaces as they must be stable enough for a long period of time. Current research involved designing and manufacturing of a new creep testing machine. The equipment is capable to perform simultaneous light-duty creep tests on more than one cylindrical rock samples at a very low cost.To evaluate the equipment’s pe...

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ژورنال

عنوان ژورنال: African Journal of Disability

سال: 2017

ISSN: 2226-7220,2223-9170

DOI: 10.4102/ajod.v6i0.358