modified screw gear, added 3.5 HDD rack
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b303e9978b
commit
65960151ad
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// Two-way stackable 3.5" HDD rack
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// GPLv3, (c) Vitaliy Filippov, 2018
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w = 100; // HDD width
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h = 29; // HDD height + spacing
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hl = 147; // HDD length
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l = 25; // Mount width
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fh = 13; // Fixer height (must be < h/2)
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t1 = 5; // Wall thickness
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th = 5; // Bracket notch thickness
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wo = 6; // Width offset (must be > 5)
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sw = 5; // Stack notch thickness
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module mount2() {
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difference() {
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union() {
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translate([-t1-wo,-5,-5]) cube(size=[t1,l,5+h]);
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translate([-t1-wo,-5,-5]) cube(size=[t1*2+w+wo*2,l,5]);
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translate([w+wo,-5,-5]) cube(size=[t1,l,5+h]);
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translate([-t1-wo-sw,l-15,-5]) cube(size=[w+wo*2+sw*2+t1*2,5,5]);
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translate([w,0,0]) cube(size=[wo,5,5]);
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difference() {
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translate([-t1-wo-sw,-5,h-5]) cube(size=[sw,l-5,15]);
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translate([-t1-wo-sw,l-15,h]) cube(size=[sw,l-5,5]);
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}
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difference() {
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translate([w+wo+t1,-5,h-5]) cube(size=[sw,l-5,15]);
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translate([w+wo+t1,l-15,h]) cube(size=[sw,l-5,5]);
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}
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translate([w+wo,-5,h-10]) cube(size=[5+2*sw+2*t1,5,10]);
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translate([w+wo+2*t1+2*sw,-5,h-10]) cube(size=[5,10,10]);
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}
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translate([-t1-wo-1, l-th-10-0.2, h/2-th-0.2]) cube(size=[t1+2,th+0.4,th*2+0.4]);
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translate([w+wo-1, l-th-10-0.2, h/2-th-0.2]) cube(size=[t1+2,th+0.4,th*2+0.4]);
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translate([-wo-t1-sw-1,-5-1,h-10]) cube(size=[wo+t1+sw+2,5+1,10]);
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}
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}
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module bracket() {
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translate([-wo, l-th-10, h/2-th]) cube(size=[5, hl-2*(l-th-10), th*2]);
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translate([-wo-t1-1, 10, h/2-th]) cube(size=[5+t1+1, th, th*2]);
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translate([-wo-t1-1, hl-2*(l-th-10)+th, h/2-th]) cube(size=[5+t1+1, th, th*2]);
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}
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module fixer() {
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difference() {
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union() {
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translate([w, -5, 0]) cube(size=[wo, l-10, fh]);
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translate([w-30, -5, 0]) cube(size=[wo+30, 5, fh]);
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}
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translate([w-1, 0, -1]) cube(size=[wo+2, 5+0.2, 6+0.2]);
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}
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}
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module cover() {
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translate([-t1-wo,-5,-5]) cube(size=[t1*2+w+wo*2,l,5]);
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translate([-t1-wo-sw,l-15,-5]) cube(size=[w+wo*2+sw*2+t1*2,5,5]);
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}
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module assembly(c) {
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color([0.8,0.6,1]) cube(size=[w,hl,27]);
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color(c) mount2();
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color(c) translate([0,hl,0]) rotate([0, 0, 180]) mirror() mount2();
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color([0.5,1,0.5]) {
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bracket();
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translate([w,hl,0]) rotate([0, 0, 180]) bracket();
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}
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color([0.5,1,1]) {
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fixer();
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translate([0,hl,0]) rotate([0, 0, 180]) mirror() fixer();
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}
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}
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module covered_assembly(c) {
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assembly(c);
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translate([0, 0, h+5]) {
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cover();
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translate([w,hl,0]) rotate([0, 0, 180]) cover();
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}
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}
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translate([0, 0, 0]) assembly();
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translate([0, 0, h+5]) covered_assembly([0.5,0.5,1]);
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translate([-w-2*wo-2*t1-2*sw, 0, 0]) assembly([0.5,0.5,1]);
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translate([-w-2*wo-2*t1-2*sw, 0, h+5]) covered_assembly();
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//mount2();
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//fixer();
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//bracket();
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//cover();
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//mirror() mount2();
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//mirror() fixer();
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@ -1,28 +1,43 @@
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screw_gear(8, 4, 2, 8, 18, 32);
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translate([-40, 0, 0]) mirror() rotate([0, 0, 180]) screw_gear(8, 4, 2, 2, 8, 18, 32);
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module screw_gear(outer_radius, inner_radius, thickness, thread_length, precision, total_length)
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difference() {
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union() {
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for (i=[1:10]) rotate([0, 0, 360*i/10]) screw_gear(8, 6, 2, 60, 64, 18, 64);
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}
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// translate([-50, 0, 0]) cube(size=[100,100,100]);
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}
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#difference() {
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translate([-15, 0, 0]) mirror() rotate([0, 0, 360/2/10]) {
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union() {
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for (i=[1:10]) rotate([0, 0, 360*i/10]) screw_gear(8, 6, 2, 60, 64, 18, 64);
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}
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}
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// translate([-50, 0, 0]) cube(size=[100,100,100]);
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}
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module screw_gear(outer_radius, inner_radius, outer_thickness, inner_thickness, thread_length, precision, total_length)
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{
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linear_extrude(height=total_length, twist=360*total_length/thread_length, slices=360)
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polygon(
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points = screw_crosssection(outer_radius, inner_radius, thickness, thread_length, precision),
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paths = [ range((precision+8)*2) ]
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points = screw_crosssection(outer_radius, inner_radius, outer_thickness, inner_thickness, thread_length, precision),
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paths = [ range((precision+precision)*2) ]
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);
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}
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function screw_crosssection(outer_radius, inner_radius, thickness, thread_length, precision) =
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function screw_crosssection(outer_radius, inner_radius, outer_thickness, inner_thickness, thread_length, precision) =
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concat(
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[ for (x=[1 : 8]) polar(outer_radius, thickness*360/thread_length*x/8) ],
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[ for (x=[1 : precision]) polar(outer_radius, 360*outer_thickness/thread_length*x/precision - outer_thickness/2/thread_length*360) ],
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[ for (x=[1 : precision])
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polar(
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outer_radius-(outer_radius-inner_radius)*x/precision,
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thickness*360/thread_length + x/precision*(180-(thickness*360/thread_length))
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outer_thickness/2/thread_length*360 + 360*(1-outer_thickness/thread_length-inner_thickness/thread_length)/2*x/precision
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)
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],
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[ for (x=[1 : 8]) polar(inner_radius, 180 + thickness*360/thread_length*x/8) ],
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[ for (x=[1 : precision]) polar(inner_radius, 180 + 360*inner_thickness/thread_length*x/precision - inner_thickness/2/thread_length*360) ],
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[ for (x=[1 : precision])
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polar(
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inner_radius+(outer_radius-inner_radius)*x/precision,
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180 + thickness*360/thread_length + x/precision*(180-(thickness*360/thread_length))
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180 + inner_thickness/2/thread_length*360 + 360*(1-outer_thickness/thread_length-inner_thickness/thread_length)/2*x/precision
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)
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]
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);
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