GoKart Kelsey McRae (IMage soon to change)

Planning Stage

Body

The basic layout of the GoKart consists of the bottom rectangular piece of wood which is attached to a seat, a back axel, and a front axel.
The seat will consist of a rectangle and two triangles that will snap together.
Working out dimensions, the area behind the seat will be about 14-15 inches to be able to fit the drill and the wheel.

Braking

Braking will include a pedal that connects to a plank that travels under the body to press on the wheel and stop it. These were for the dimensions and angles of that pedal.

Motor Drive

The drill will drive one tire on the back axel
The wheel will connect to three gears turned be the drill.
The original plan was to have a chain to link the gears, but as our tires do not have coast control, we needed to be able to let the wheel keep turning after the drill stops.
Then we decided to get rid of the chain, and put the drill in a casing that can be moved by springs. Then we can separate the drill from the tire before it stops turning.

Steering

The steering will consist of a lever that moves a plank of wood and then the front axel containing the tires, such as in the picture.

The front axel will have a rod that spans the length of the wood. The whole plank of wood, connecting two tires, will rotate from the middle point when turned with the lever.

Throttle

The throttle will be controlled by a pedal. A string will be attached that runs the length of the body and pulls on the trigger of the drill. A wood casing will keep the string in place.

Materials

We made a list of materials we would need and how many we would need of each.
This is a list of the materials we would need from Lowe's

OnShape

Before creating our models, we assigned each person to a specific part. Then we measured the thickness of the wood to have accurate dimensions in our designs.
This is the backing for the seat. The holes would fit right into the spaces on the triangles.
This triangle will support the back of our driver. It will be able to click into the rectangle and the base.
This base is designed to be able to attach the seat firmly. There is a hole in the back for the tire and a circular hole in the front to attach the front axel.
This is the plank of wood to hold the front two tires. It will be able to rotate for steering.
This is the full assembly of all of the pieces. The piece sticking up from the base of the kart is only representative of the acceleration and is not what the final product will look like.

VCarve

Base

The first failed attempt at arranging the pieces onto our piece of wood to shopbot. Some ratios are off and the arrangement is inefficient.
This is the final arrangement of our pieces before shopbotting on VCarve.

Gears

These gears would be used to drive the back tire. This is our first attempt, and sizes may require more experimentation.

ShopBot

Base

Before placing the wood onto the shopbot we needed to determine the coordinates in which to put the screws.
After using VCarve to determine safe points for screws, we marked each coordinate with pieces of tape.
We screwed in the wood, shopbotted out our pieces, then used a hammer to remove all the tabs.

Assembly

All of the pieces for the seat were assembled together through the use of a sander and a mallet.
Adding support to the base

Systems

Acceleration

We ran a long piece of wood with a long divet cut out along the length of the base next to the gas pedal for the string for acceleration to run along without interference.

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