Cal Poly Battle Bots Senior Project Prelim CAD Prototype

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This prototype Battle Bot was designed in two weeks as an exploration into some design choices our team may consider while developing our Battle Bot in the coming year. The primary goals of this design were speed, maneuverability, and a vertical weapon spinner. Additionally, this design was built with part sourcing in mind which is why all the included components are either already on hand or can be easily sourced/manufactured.The chassis is based upon the Andymark KOP chassis which was provided to us by Professor Murray. This design trims down the chassis to the length of the front two wheels and a width that will accommodate the gearboxes and motors for both the drivetrain and the weapon spinner.A vertical spinner design was chosen per the sponsor’s recommendation. The vertical spinner along with the weapon support structure will be cut from a ¼” sheet of plate steel. Forks were included in order to better grab opponents to score repeated hits with the disk instead of sending robots flying apart after each single hit. Forks are advantageous when compared to a ramp because ramps can more easily be bent in such a way that would hinder their functionality. Neo Brushless DC motors from Rev robotics will be used for the drivetrain and weapon since they are compatible with Andymark gearboxes and can provide high speed and torque while maintaining a relatively small form factor (as compared to Andymark CIM motors). These motors were designed to be paired with Spark Max motor controllers from Rev Robotics which allows access to closed loop control with the Neos’ built-in encoders. Brushless motors are ideal for high impact applications as they have less surface contact to generate heat and wear compared to brushed DC motors.Plastic side bumpers (green) were added to protect the otherwise exposed axels of the drivetrain. These bumpers not only protect direct attacks from the side but also limit other robots’ reach when reaching from the sides to attack over the top or from the bottom. The top armor (transparent) is made from a single cut and folded sheet of steel and serves to protect the top of the chassis. The top armor design has significant room for improvement.Full design write-up can be found in attached PDF.