[SCAD] 喷雾罐杆延伸部的画笔或扫帚柄接口

[SCAD] Painter/Broomstick socket for Spray Can Pole Extension

2024-03-20 14:58:28

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Summary

A combination of 1/ ACME painters thread female end 2/ Spray Can Socket for "Spray Can Pole Extension".

I did this in OpenSCAD, so I also supplied the SCAD file. However, there's no need to alter parameters to fit standard ACME threaded extension poles (aka painters extension poles).

For most users: simply print the "broom_acme_thread_socket.stl".

For users that would like to edit the scad: be sure to have "Sprayer-1_-Sprayer-_Socket-1.STL" and "Painters_Pole_Female_End_v3_repaired.stl" in the same folder as the scad file for the import() in the scad file to work correctly.

Note the "Painters_Pole_Female_End_v3_repaired.stl" is a post-processed version of the one in https://www.thingiverse.com/thing:3619872 Painter Pole Female End by eric_csuf. The original STL had a broken STL mesh I had to repair. Otherwise, OpenSCAD will not be able to merge any shapes with it.

Printing note:

You may need to rotate the broom_acme_thread_socket.stl 90 degrees on the x-axis for a print without support. But the threads would be "layered" resulting in slightly weaker strength.
If you print "sideways" in the STL's natural layout, be aware the top part of the socket is not flushed with the print plate. You may want to paint on support for that section to ensure no droop-age.

How I Designed This

Import these STLs into OpenSCAD: 1/ ACME thread STL 2/ default socket from the spray can extension design.
Orient and fit both pieces together.
Noticed there is a "gap" between the two pieces.
Used a "bounding box" strategy to find the boundary shape of the smaller of the two STLs, which happens to be the ACME thread.
Used offset() in OpenSCAD to produce a filler cylinder ring. Use the '#' prefix to highlight the model pieces to ensure there's a good enough overlap to fill all gaps.
Orient and fit pieces again.
Finally, set the "pin hole" that preexisted in the original socket for the spray can extension design. This was optional, but a nice touch for tacking on a set screw when used in the real world.