Featherweight Robot Chassis (Organic Blend)

Design a fully parametric 3D CAD model of a lightweight featherweight combat robot chassis optimized for CNC machining and easy assembly. Target Specifications: Total robot target weight: 5.5 kg Single-piece 7075-T6 aluminum base plate (5 mm thick) with integrated mounting holes. Overall dimensions approximately 360 × 320 × 80 mm (parametric). Low center of gravity. Flat-bottom chassis with no unnecessary brackets. Drive System: Four drive motors mounted directly to the base plate (2 per side). Integrated motor mounting patterns with slotted adjustment holes. Space for wheels and bearings. Cable routing channels built into the base. Weapon System: One front-mounted vertical spinner. One BLDC weapon motor mounted behind the weapon shaft. Belt-driven reduction using 1:2 pulley ratio. Motor pulley diameter = 1 unit. Weapon pulley diameter = 2 units. Adjustable motor slots for belt tension. Weapon shaft supported by two bearing blocks mounted directly to the base. Dedicated mounting holes for weapon guards. Electronics Layout: Rear-mounted battery compartment with Velcro strap slots. Dedicated mounting positions for: Main relay Receiver Drive motor controller(s) Weapon ESC Power distribution board Fuse and power switch Electronics protected behind the weapon assembly. Structure: Remove all unnecessary internal brackets and spacer plates. Integrate mounting bosses directly into the base. Pocket-machine non-load-bearing regions to reduce weight while maintaining stiffness. Include side armor mounting holes. Include front wedge mounting holes. Include top cover mounting holes. Use symmetric design for easy manufacturing. Manufacturing Requirements: CNC-friendly geometry. Standard metric fasteners (M3–M5). Filleted internal corners. Minimal number of unique parts. Easy maintenance with direct access to electronics. Output Requirements: Fully assembled parametric CAD model. Separate components as editable bodies. STEP (.step), SolidWorks (.sldprt/.sldasm), and Fusion 360 compatible. Include exploded assembly and assembly constraints. Design optimized for high rigidity, low weight, and simple fabrication.

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