FlexCar Gear Set

cults3d

I transformed Flexbot into FlexCar, designing the model and 3D printing the gear set myself. The motor spins rapidly, requiring a gear set to slow down its speed. We calculated a speed-reducing ratio of 1:52 and measured the overall size as 59mm in length, 77mm in width, and 20mm in height. To build this project, you will need various materials and equipment, most of which can be found at home. I use an FDM 3D printer with PLA filament, setting layers to 0.15mm and extruder diameter to 0.55mm. For the gears' shafts, I employed a core from a common rivet (diameter: 2mm) and chopsticks (diameter: 5mm). Two metal axles (internal diameter: 5mm, external diameter: 10mm, height: 4mm) are also required, along with lubricating oil. After printing the gear set, I was pleased to find it worked effectively. However, due to the inaccuracy of 3D printed components, the gears produced significant noise when moving, sounding similar to an impact drill drilling into a wall. When connecting the smallest motor to the core-less motor (m=1, z=7), with an installation diameter of 1mm for the axle, slips occurred frequently between the gear and the axle. If you have any suggestions or ideas for this design, I would be grateful to hear them, as they would help me improve FlexCar. You can find our project on GrabCAD at https://grabcad.com/library/flexcar-gear-set-1