The frame for the hand-cycle was designed from commercially available Al 6061-T6 tubing.
FEA was used to verify the integrity of the frame design.
Steering is achieved using hydraulic actuators. These are moved using a swivel mechanism at the hand interface.
Actuators mounted at the steering column apply the force that is input at the hand controls.
A rear transmission was designed to allow independent wheel engagement, and inversion of the freewheel mechanisms. This was hydraulically operated as well.
Detail view of freewheel engagement mechanism.
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Hand-Cycle Design
I designed this hand-cycle for my undergraduate senior design project at the University of Costa Rica. The goal of this project was to propose an alternative hand-cycle design that allows for a more efficient and functional user experience, emphasizing the mechanical considerations of the design.
