02217443ea
Consolidating seb/saltylab into saltylab-firmware before deleting the seed repo. - 16 OpenSCAD CAD models → cad/ - Design docs (SALTYLAB.md, PLATFORM.md, AGENTS.md, board-viz.html) → docs/
76 lines
2.4 KiB
OpenSCAD
76 lines
2.4 KiB
OpenSCAD
// ============================================
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// SaltyLab — Bumper (Front/Rear)
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// 350×50×30mm TPU
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// Absorbs falls, protects frame and floor
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// ============================================
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include <dimensions.scad>
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bumper_w = 350;
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bumper_h = 50;
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bumper_d = 30;
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bumper_wall = 2.5;
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// Honeycomb crush structure for energy absorption
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hex_size = 8;
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hex_wall = 1.2;
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module honeycomb_cell(size, height) {
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difference() {
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cylinder(d=size, h=height, $fn=6);
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translate([0, 0, -1])
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cylinder(d=size - hex_wall*2, h=height + 2, $fn=6);
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}
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}
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module bumper() {
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difference() {
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union() {
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// Outer shell (curved front face)
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hull() {
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translate([-bumper_w/2, 0, 0])
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cube([bumper_w, 1, bumper_h]);
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translate([-bumper_w/2 + 10, bumper_d - 5, 5])
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cube([bumper_w - 20, 1, bumper_h - 10]);
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}
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}
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// Hollow interior (leave outer shell)
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hull() {
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translate([-bumper_w/2 + bumper_wall, bumper_wall, bumper_wall])
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cube([bumper_w - bumper_wall*2, 1, bumper_h - bumper_wall*2]);
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translate([-bumper_w/2 + 10 + bumper_wall, bumper_d - 5 - bumper_wall, 5 + bumper_wall])
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cube([bumper_w - 20 - bumper_wall*2, 1, bumper_h - 10 - bumper_wall*2]);
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}
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// Mounting bolt holes (M5, through back face, 4 points)
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for (x = [-120, -40, 40, 120]) {
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translate([x, -1, bumper_h/2])
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rotate([-90, 0, 0])
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cylinder(d=m5_clear, h=10, $fn=25);
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}
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}
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// Internal honeycomb ribs for crush absorption
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intersection() {
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// Bound to bumper volume
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hull() {
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translate([-bumper_w/2 + bumper_wall, bumper_wall, bumper_wall])
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cube([bumper_w - bumper_wall*2, 1, bumper_h - bumper_wall*2]);
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translate([-bumper_w/2 + 15, bumper_d - 8, 8])
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cube([bumper_w - 30, 1, bumper_h - 16]);
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}
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// Honeycomb grid
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for (x = [-170:hex_size*1.5:170]) {
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for (z = [0:hex_size*1.3:60]) {
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offset_x = (floor(z / (hex_size*1.3)) % 2) * hex_size * 0.75;
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translate([x + offset_x, 0, z])
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rotate([-90, 0, 0])
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honeycomb_cell(hex_size, bumper_d);
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}
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}
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}
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}
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bumper();
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