43 lines
1.4 KiB
OpenSCAD
43 lines
1.4 KiB
OpenSCAD
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/* Pinion chain protection */
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/* Gates rim parameter */
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DiameterFront=152; /* mm */
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DiameterBack=109; /* mm */
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CenterDistanceFrontBack=475; /* mm */
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GateRimWidth=13; /* mm */
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rimSpace=3; /* mm */
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/* Pinon parameter */
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pinionTop=106; /* mm */
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pinionBottom=38; /* mm */
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pinonHeight=98; /* mm */
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pinionRotation=45; /* degrees */
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pinionWith=50; /* mm (dummy value, not used) */
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$fn=180;
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/* Bike Parameter */
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bikeRearHorizontal=48;
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bikeRearRotation=99;
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bikeRearOffset=70;
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module drawRim(dBack, dFront, width) {
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hull() {
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translate([CenterDistanceFrontBack/2, 0, 0]) cylinder(d=dFront, h = width, center = true);
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translate([-CenterDistanceFrontBack/2, 0, 0]) cylinder(d=dBack, h = width, center = true);
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}
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}
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difference() {
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drawRim(dBack=DiameterBack+rimSpace*2,
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dFront=DiameterFront+rimSpace*2,
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width=GateRimWidth+rimSpace*2);
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union() {
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translate([0,0, rimSpace/2]) drawRim(dBack=DiameterBack,
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dFront=DiameterFront,
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width=GateRimWidth+rimSpace*2);
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translate([CenterDistanceFrontBack/2, 0, 0]) rotate([0, 0, pinionRotation]) translate([pinionBottom, 0, 0]) cube([pinionTop+pinionBottom, pinonHeight, pinionWith], center=true);
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translate([bikeRearOffset, 0, 0]) rotate([0, bikeRearRotation, 0]) cylinder(d=bikeRearHorizontal, h=CenterDistanceFrontBack, center=true);
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}
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}
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