Tri-Mode Spring Motor Car – Larger Spring, No More O-Rings And More 3D Printer Model
The file 'Tri-Mode Spring Motor Car – Larger Spring, No More O-Rings And More 3D Printer Model' is (f3d,stl) file type, size is 4.2MB.
The file 'Tri-Mode Spring Motor Car – Larger Spring, No More O-Rings And More 3D Printer Model' is (f3d,stl) file type, size is 4.2MB.
Thank you, gzumwalt, for this incredible design!
While gzumwalt's idea to hide the spring within its gear is genious it was too subtle for my not so fine motor skills: Trying to get the maximum distance out of the car I destroyed 3 springs.
Therefor I combined the pull back system with the larger and open spring from gzumwalt's previous work. As I needed to counter the spring somewhere I built that frame around the front axle. And asI started it I changed a few other things that came to my mind:
I designed new wheels that work with tires I printed using TPU. I found that easier and cheaper (a 50 g sample will cost you 3 € and give you an unlimited amount of tires).
All the disassembling and assembling for test purposes wore down the axles and wheels, so the friction sometimes didn't make them stick together anymore. So I built axles with screws at the end and the matching screw nuts. I designed an o-ring version, too.
My tire design is actually the result of quite a bit of testing in order to resolve the problem of the wheels trending to spin causing the car to spin itself. My finding was that the problem is less the friction between tires and ground, but rather the light weight of the car. So I added an additional thread to add some steel nuts (M10). These steel nuts are not mandatory but recommended.
| rsmrc_-_alternative_custom_tires_TPU_-_4x.f3d | 287.6KB | |
| rsmrc_-_axle_front.stl | 558.1KB | |
| rsmrc_-_axle_gear_idler_large.stl | 64.0KB | |
| rsmrc_-_Axle_Gear_Idler_Small_-_2x.stl | 85.3KB | |
| rsmrc_-_axle_gea_spring.stl | 61.4KB | |
| rsmrc_-_axle_rear.stl | 693.4KB | |
| rsmrc_-_Chassis_center.stl | 165.6KB | |
| rsmrc_-_chassis_left_and_right.stl | 1.4MB | |
| rsmrc_-_custom_tires_TPU_-_4x.stl | 72.5KB | |
| rsmrc_-_custom_tires_TPU_air_-_experimental_-_4x.stl | 384.0KB | |
| rsmrc_-_custom_tires_TPU_profile_-_experimental_-_4x.stl | 597.7KB | |
| rsmrc_-_Gear_Axle_Rear_-_2x.stl | 226.1KB | |
| rsmrc_-_gear_idler_large-small.stl | 999.8KB | |
| rsmrc_-_gear_idler_large_and_spring_-_2x.stl | 782.1KB | |
| rsmrc_-_Gear_Idler_Small_-_2x.stl | 253.9KB | |
| rsmrc_-_screw_nut_wheel_4x.stl | 261.8KB | |
| rsmrc_-_spring.f3d | 159.9KB | |
| rsmrc_-_spring_-_right_orientation.stl | 2.8MB | |
| rsmrc_-_wheel_custom_tires_-_4x.stl | 1.5MB | |
| rsmrc_-_wheel_oring_-_4x.stl | 4.0MB |
