croozer-joint.scad

   1 // joint for Croozer Cargo
   2
   3 infty = 100;
   4 eps = 0.01;
   5
   6 side_space = 1.5;
   7 wall = 2;
   8 corner_d = 3;
   9
  10 inner_w = 16 + 0.6;
  11 outer_w = 22.5 - 0.3;
  12 body_h = 45;
  13
  14 hole_d = 7*1.1;
  15 hole_off = 29;
  16
  17 module body() {
  18         hull() for (angle = [45:90:360]) rotate([0, 0, angle])
  19                 translate([outer_w/sqrt(2)-corner_d*sqrt(2)/2, 0, 0])
  20                         cylinder(r=corner_d/2, h = body_h, $fn = 8);
  21         hull() for (angle = [45:90:360]) rotate([0, 0, angle])
  22                 translate([(outer_w+2*wall)/sqrt(2)-corner_d*sqrt(2)/2, 0, 0])
  23                         cylinder(r=corner_d/2, h = side_space, $fn = 8);
  24 }
  25
  26 difference() {
  27         body();
  28         translate([-inner_w/2, -inner_w/2, -eps])
  29                 cube([inner_w, inner_w, body_h + 2*eps]);
  30         translate([0, infty/2, hole_off])
  31         rotate([90, 0, 0])
  32                 cylinder(r = hole_d/2, h=infty, $fn = 6);
  33 }