An overview of some of the ideation concepts I came up with at the beginning of the project. With the goal being the reduction of Hand Arm Vibration Syndrome (HAVS), I looked to find ways of changing how users operated the tool, or how I could dampen the end vibrations caused by the tool.
A selection of some of the low-fidelity prototypes I crafted when developing this project. The goal was to establish a proof of concept by testing the ergonomics and overall comfort when handling the tool inside of the accessory. The model with layered foam was used to test the potential of using layers of various materials with desirable properties to achieve a dampening effect on the vibrations caused by the tools.
A showcase of the initial CAD file I produced, aiming to test the feasibility of using a tolerance-based locking mechanism. This would ensure the accessory is always ready for disassembly whilst remaining functional.
Development from the previous CAD Model, which after testing its prototypes proved to lack the stability and tolerance required for application to the brief.
With both CAD mockups I printed test models using FDM printers to test the ergonomics and tolerances of the mounting mechanisms. In this instance I also made use of a heat gun to allow me to test the model with nuts and bolts so as to achieve a more mechanical fixing. WIth thismodel I found the correct requirements for a flush-fitting accessory that also meets the demands of design for disassembly.
The CAD Model of my final prototype design for the JP-901's undercarriage brace.
The final model of the Cengar JP-901 undercarriage brace, equipped with an interchangable top housing made using TPU filament. This contact point for the palm uses a 'gyroid' infill pattern, which results in a ductile yet vibration resistant surface.
A presentation detailing the main features of the attachment.
With consideration for the lifespan of the attachment, I considered design for disassembly when working on this project. Another consideration that I would have liked to work on is making the product more weather-resistant 'overall', with less of a reliance on manual replacement of the softer materials. This could be done by using chemically resistant materials on the exterior for example, to shield the rubber grip.
A hero image of the final model.
The top-housing could be replaced with different compounds of a given material. For example a higher density component may favour a reduction in vibration with the tradeoff of being less ergonomic.
