I want to convert my son's pedal car to electric. The car is meant for 3-6 year old children.
So far I got the following:
- 50W, 3300 RPM electric motor with 8mm round shaft (no keyway or shaft groove)
- 10mm threaded rod made of some fairly soft metal to use as a shaft
I was thinking to connect the motor to the shaft with XL timing pulleys. With a 10 teeth pulley connected to the motor and a 100T one on the shaft, I would get a 10X RPM reduction and with 10-inch wheels, I calculate that the max speed of the car will be ~15KM/h. Probably still a bit to high but I could do further electronic limiting.
Now I have a few questions:
- Would there be issues if I combine the smallest pully in the range with the largest one? It seems XL-10T is the smallest and XL-100T is the largest.
- Considering these easily available pulleys are almost always mounted with set screws would the grip be sufficient for this application?
- What is the required belt length if the distance between shafts is ~90mm?
- What is a practical way to tension the belt for something like this?
- Is 10mm thick enough for this belt?