Embedded Files
Project Outline
Project Outline
ENG_5_442 Engineering Design - Coursework Assignment 2.pdf
Sketch 1 (Andres)
Idea 3 -Roller
Sketch 2 (Andres)
Idea 2 - Pulley Vehicle
For this year's IMechE Design Challenge my team and I were tasked to design a vehicle that met the parameters set from the product design specification:
Vehicle must complete a route
Must carry a material of 120 x 40 x 25 (mm)
The vehicle must fit in a 400 x 400 x 400 (mm) working envelope
No human interaction is allowed during operation
The cost must not exceed £100
Ease of Manufacture
Each of my team members designed 2 sketches, producing 8 sketches in total.
Sketch 1 is based on an asphalt roller, the concept of the asphalt roller reduces the chances of the repeatable vehicle diverting from the centerline. As the vehicle travels back to the start point and the second target, it will remain on target. The design on top of the casing is designed to protect the motor, materials. and additional components from an impact sustained by the vehicle touching the wall. With supports on the sides, keeping the material from moving.
Sketch 2 adapts tank treads in another attempt to prevent the vehicle from diverging from the centerline. Assuming the treads rotate at the same speed the vehicle will travel in a straight line, with the material inside the vehicle casing. The treads are based on tank treads and will contain a motor to spin the sprockets to move the treads around where the wheels run along. The large surface area on the front of the vehicle will absorb the impact from the wall.
To pick the best model, we used a concept selection matrix. This led to us picking Idea 2.
Prototype
Prototype
Idea 2 (Pulley Vehicle) has been chosen to be the final design for the IMechE design challenge, the score reached was 3.135. Design 2 designed by Alberto Camanero Herrera achieves the design requirements and aims, containing space for the material with support to secure it. Designed with simple shapes and a minimal amount of material to make it lightweight to decrease the power required by the motor.
Through the creation of the prototype using Styrofoam, a motor, elastic band, toothpicks, batteries and bottle lids failures in the designs were noticed. First without proper support the top surface would likely be unstable even with the addition of finger joints and glue. Also, a better wheel design for the pulley system is required due to resistance from the ground. The top surface seems inadequate to cater to all the components required for the repeatable vehicle to function therefore more spacing is needed. With 30mm wheels seeming small in concept great size will aid in the task of travelling to different points.
Final Design
Final Design
The design has been further developed with the addition of two motors to increase the power produced, also the modification of the back wheels to further reflect a pulley system to prevent more friction on the belt when rotating. The previous design had the belt in constant contact with the ground which could have resulted in a lot of wear on the belt also with increased friction the power transmission is negatively affected. The overall length has been reduced to ultimately increase the width and reinforce the vehicle with thicker MDF wood.
Final Design Render 1
Final Design Render 2
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