可打印曲轴飞轮

Create a 3D printable mechanical crankshaft assembly. The part consists of: - A central shaft with diameter 8mm - A large flywheel mounted on the shaft (80mm diameter, 10mm thick) - An off-center crank pin located 15mm from the shaft center - The crank pin diameter is 4mm and used to attach a connecting rod The flywheel should include: - a reinforced hub - a shaft hole for an 8mm metal rod - optional set screw hole The crank pin should rotate with the flywheel and convert rotary motion into linear motion through a connecting rod. Design requirements: - optimized for FDM 3D printing - smooth circular surfaces - strong hub reinforcement - printable in PLA - tolerances for press-fit metal shaft Separate the components into: - flywheel with crank pin - connecting rod