Drill Powered Cart rebecca siple

Problem Statement:

Before the end of the year we must build a drill powered cart including a brake and steering mechanism and a seat with a back. our budget is $25 but some materials are already included and do not need to be purchased, these include pieces of PVC, a 4' X 8' piece of plywood, assorted pieces of small wood, and screws. We are being evaluated on speed and maneuverability which will be assessed at the end of a project with an obstacle course and race.

Research:

This photo is an example of one of our options for drill attachment.

http://s3files.core77.com/blog/images/2013/11/FS-Alan-Fratoni-Drill.jpg

This photo gave us one idea for our steering that we may or may not use, it at least gives us more options if our current design for steering doesn't go as planned.

http://coolest-hacks.com/wp-content/uploads/2015/03/go-kart-powered-by-drill-motor-7.jpg

For more videos and photos of our design references please follow this link:

Design:

Our first step was to brainstorm ideas on a dry erase board, we spent the class drawing up parts we thought would be useful and compiling them on this board.

My partners and I then chose one or two parts to draw detailed sketches on, some of the sketches are not quite so detailed and on the chair parts are missing but I fixed my partners mistakes once we moved on to OnShape.

The image above shows our assembled OnShape pieces, this doesn't include the wheels since we will be buying wheels instead of making them. the brake and acceleration are not attached because they will be fastened on with hinges.

Build:

The OnShape files were converted to v-carve files and cut out on the shopbot, the assembled chair is shown above.

The floor of the cart was cut out as one piece and scrap wood was used as the brake and acceleration handles which are shown above on top of the cart floor but are not yet attached.

The chair was then attached to the floor of the cart, however the wheels had not yet arrived and were therefore not attached. As a result the floor of the cart was resting on the ground preventing the brake and acceleration rods from being attached.

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