From 45a3bc44d48aa9374f13a69a3deb73cf780667be Mon Sep 17 00:00:00 2001 From: Revar Desmera Date: Sat, 17 Jun 2023 22:39:06 -0700 Subject: [PATCH] Added planetary gear examples to spur_gear() and spur_gear2d() --- gears.scad | 53 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 53 insertions(+) diff --git a/gears.scad b/gears.scad index ab8f687..2691757 100644 --- a/gears.scad +++ b/gears.scad @@ -109,6 +109,36 @@ // color("#fc7") left(r1+r4) zrot(a4) spur_gear(pitch,n4,thickness,hole,hide=n4-3); // color("#ccc") fwd(r1) right(pitch*$t) // rack(pitch=pitch,teeth=n5,thickness=thickness,height=rack_base,anchor=CENTER,orient=BACK); +// Example(Anim,Frames=36,VPT=[0,0,0],VPR=[55,0,25],VPD=375): Planetary Gear Assembly +// rteeth=56; pteeth=16; cteeth=24; +// pitch=5; thick=10; pa=20; +// prad = (pitch_radius(pitch,rteeth) + +// pitch_radius(pitch,cteeth)) / 2; +// rrad = outer_radius(pitch,rteeth,interior=true) + 5; +// diff() +// cyl(r=rrad,l=thick) +// tag("remove") +// spur_gear( +// pitch=pitch, teeth=rteeth, thickness=thick+1, +// pressure_angle=pa, interior=true); +// for (a=[0:3]) { +// zrot($t*90+a*90) back(prad) { +// color("green") +// spur_gear( +// pitch=pitch, teeth=pteeth, +// thickness=thick, +// shaft_diam=5, +// pressure_angle=pa, +// spin=-$t*90*rteeth/pteeth); +// } +// } +// color("orange") +// zrot($t*90*rteeth/cteeth+$t*90+180/cteeth) +// spur_gear( +// pitch=pitch, teeth=cteeth, +// thickness=thick, +// shaft_diam=5, +// pressure_angle=pa); function spur_gear( pitch = 3, teeth = 11, @@ -228,6 +258,29 @@ module spur_gear( // spur_gear2d(pitch=5, teeth=20, pressure_angle=20); // Example(2D): Partial Gear // spur_gear2d(pitch=5, teeth=20, hide=15, pressure_angle=20); +// Example(2D): Planetary Gear Assembly +// rteeth=56; pteeth=16; cteeth=24; +// pitch=5; pa=20; +// prad = (pitch_radius(pitch,rteeth) + +// pitch_radius(pitch,cteeth)) / 2; +// rrad = outer_radius(pitch,rteeth,interior=true) + 5; +// difference() { +// circle(r=rrad); +// spur_gear2d( +// pitch=pitch, teeth=rteeth, +// pressure_angle=pa, interior=true); +// } +// for (a=[0:3]) { +// zrot(a*90) back(prad) { +// color("green") +// spur_gear2d( +// pitch=pitch, teeth=pteeth, +// pressure_angle=pa); +// } +// } +// color("orange") +// zrot(180/cteeth) +// spur_gear2d(pitch=pitch, teeth=cteeth, pressure_angle=pa); // Example(2D): Called as a Function // path = spur_gear2d(pitch=8, teeth=16); // polygon(path);