This is a split timing belt pulley that will drive the sun-cover on my terrace. It is is currently manually operated and quite often fails to retract when the sun goes down, it starts to rain or the tenants leave for vacation.
The base is a 32 tooth T5 belt pulley from MacMaster-Carr. (I had a T5 belt and some smaller pulleys already.)
The sides are extended on to accommodate for clamping/fastening.
The belt guides where made a bit thicker and a fillet was added make the sides a bit more robust.
Additionally, the gap between the two halves have been reduced by 0.5 mm to actually provide some clamping force.
Four M5 bolts/nuts pairs clamp on the 13mm axle.
Two M6 set screws to grip into the axle itself. (Those holes will be threaded manually. If the plastic isn't strong enough I can always drill it up a bit larger and insert helicoils, or redesign with nut cutouts on the inside similar to the outside).
The plan is to 3D-print it, which will look something like this:
I'm quite happy with this little piece, and that I managed to do it without any previous Fusion 360 experience in a few hours. :-D
The step file is available for download: 13x5T-32-Split v21.step
2 comments :
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