add suspension cube (model & drill stencil)

3 files changed, 112 insertions, 0 deletions

diff --git a/suspension_cube.scad b/suspension_cube.scad
new file mode 100644
index 0000000..e3be454
--- /dev/null
+++ b/suspension_cube.scad
@@ -0,0 +1,45 @@
+cube_side = 100;
+min_cube_height = 116;
+
+shaft_hole_rad=15;
+blind_hole_depth = 5; // arbitrary value, TODO
+clamp_hole_rad = 13/2;
+
+board_width=18;
+
+cube_height = board_width * ceil(min_cube_height / board_width);
+
+clamp_hole_excentricity = (shaft_hole_rad + cube_side/2 - clamp_hole_rad) / 2;
+
+module suspension_cube() {
+
+    difference() {
+	translate([-cube_side/2, -cube_side/2, 0])
+	union() {
+	    cube([cube_side, cube_side, cube_height]);
+	    cube([cube_side + board_width, cube_side + board_width, board_width]);
+	}
+
+	// bore hole for bike shaft (radius of the smallest available
+	// tool larger than the shaft radius)
+	cylinder(r=shaft_hole_rad, h=2*cube_height, center=true);
+
+	// blind holes to capture the bearing
+	for (h = [-0.001, cube_height - blind_hole_depth + 0.001])
+	translate([0, 0, h])
+	cylinder(r=20, h=blind_hole_depth);
+
+	// holes for clamping screws
+	for (i = [-1, 1])
+	for (j = [-1, 1])
+	rotate([0, 0, 45+j*45])
+	translate([i * clamp_hole_excentricity,
+		   0,
+		   board_width + (0.5 - i/4)*(cube_height - board_width) + j*clamp_hole_rad])
+	rotate([90, 0, 0])
+	cylinder(r=clamp_hole_rad, h=2*cube_height, center=true);
+    }
+}
+
+if (no_master == undef)
+suspension_cube();
diff --git a/suspension_cube.svg b/suspension_cube.svg
new file mode 100644
index 0000000..4f4716f
--- /dev/null
+++ b/suspension_cube.svg
@@ -0,0 +1,57 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   width="1033.15"
+   height="532.46002"
+   viewBox="-21 0 291.57772 150.27186"
+   version="1.1"
+   id="svg2"
+   inkscape:version="0.48.3.1 r9886"
+   sodipodi:docname="suspension_cube.svg">
+  <metadata
+     id="metadata12">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <defs
+     id="defs10" />
+  <sodipodi:namedview
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1"
+     objecttolerance="10"
+     gridtolerance="10"
+     guidetolerance="10"
+     inkscape:pageopacity="0"
+     inkscape:pageshadow="2"
+     inkscape:window-width="1198"
+     inkscape:window-height="798"
+     id="namedview8"
+     showgrid="false"
+     inkscape:zoom="0.37454771"
+     inkscape:cx="476.5748"
+     inkscape:cy="223.22835"
+     inkscape:window-x="1200"
+     inkscape:window-y="0"
+     inkscape:window-maximized="0"
+     inkscape:current-layer="svg2" />
+  <title
+     id="title4">OpenSCAD Model</title>
+  <path
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+</svg>
diff --git a/suspension_cube_stencil.scad b/suspension_cube_stencil.scad
new file mode 100644
index 0000000..c950074
--- /dev/null
+++ b/suspension_cube_stencil.scad
@@ -0,0 +1,10 @@
+no_master = true;
+
+include<suspension_cube.scad>;
+
+for (i = [0, 1])
+translate([i*1.5*cube_side, 0])
+projection(cut=true)
+translate([clamp_hole_excentricity, 0, clamp_hole_excentricity])
+rotate([90, i*90, 0])
+suspension_cube();