88 lines
3.3 KiB
OpenSCAD
88 lines
3.3 KiB
OpenSCAD
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// Tube mount for bike trainer control dial
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// length units are millimeters
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// built on its side, so depth is x-axis, height is y-axiz, width is z-axis
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mountWidth = 25.83;
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mountDepth = 36.7;
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mountHeight = 6.69;
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rubberHoleWidth = 5.20;
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rubberHoleSunkWidth = 8.20;
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rubberHoleDepth = 8.92;
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rubberHoleSunkDepth = rubberHoleDepth;
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rubberHoleSunkHeight = 1.5;
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screwHoleRadius = 3.50/2;
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screwHoleDepthOffset = 4.67 + screwHoleRadius;
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screwSpikeWidthOffset = 7.10;
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screwSpikeWidth = 2.30;
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screwSpikeDepthOffset = 2.00;
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screwSpikeDepth = 5.5;
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ledgeGapHeightOffset = 2.80;
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ledgeGapHeight = mountHeight + 0.01 - ledgeGapHeightOffset;//3.18;
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ledgeGapDepth = 5.41;
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ledgeGapWidth = 9.02;
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handlebarStemRadius = 33.45 / 2;
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handlebarRadius = 32.07 / 2;
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clampRadius = handlebarRadius + 1.5;
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clampInnerRadius = handlebarRadius;
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clampHeightOffset = 3.75;
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clampEndHeightOffset = clampRadius * 1.85;
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circleResolution=360*2; // faces per rotation
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difference() {
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union() {
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// mount base
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cube([mountDepth, mountHeight, mountWidth]);
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// circular clamp
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translate([mountDepth/2, clampRadius + clampHeightOffset, mountWidth/2]) {
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rotate([0, 0, 0]) {
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difference() {
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cylinder(h = mountWidth, r = clampRadius, center=true, $fn=circleResolution);
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union() {
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cylinder(h = mountWidth * 1.1, r = clampInnerRadius, center=true, $fn=circleResolution);
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translate([-(clampRadius + 0.01), clampEndHeightOffset - clampRadius, -(mountWidth/2 + 0.01)]) {
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cube([(clampRadius * 2) + 0.02, clampRadius * 2.02, mountWidth + 0.02]);
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}
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}
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}
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}
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}
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}
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union() {
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// hole for rubber grip to clip in
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translate([(mountDepth/2)-(rubberHoleDepth/2), -0.01, (mountWidth/2) - (rubberHoleWidth/2)]) {
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cube([rubberHoleDepth, 10, rubberHoleWidth]);
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}
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// slightly larger hole so rubber grip clip can clip
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translate([(mountDepth/2)-(rubberHoleSunkDepth/2), -0.01, (mountWidth/2) - (rubberHoleSunkWidth/2)]) {
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cube([rubberHoleSunkDepth, mountHeight- rubberHoleSunkHeight, rubberHoleSunkWidth]);
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}
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// screw hole
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translate([screwHoleDepthOffset, -0.01, (mountWidth/2)]) {
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rotate([-90,0,0]) {
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cylinder(h = mountHeight + 0.02, r = screwHoleRadius, $fn=circleResolution);
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}
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}
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// lower hole for spikes on each side of screw
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translate([screwSpikeDepthOffset, -0.01, screwSpikeWidthOffset]) {
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cube([screwSpikeDepth, 5, screwSpikeWidth]);
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}
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// higher hole for spikes on each side of screw
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translate([screwSpikeDepthOffset, -0.01, mountWidth - (screwSpikeWidth + screwSpikeWidthOffset)]) {
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cube([screwSpikeDepth, 5, screwSpikeWidth]);
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}
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// lower ledge at x-axis high end for dial's clip
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translate([mountDepth - ledgeGapDepth, ledgeGapHeightOffset, -0.01]) {
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cube([ledgeGapDepth + 0.01, ledgeGapHeight, ledgeGapWidth + 0.01]);
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}
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// higher ledge at x-axis high end for dial's clip
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translate([mountDepth - ledgeGapDepth, ledgeGapHeightOffset, mountWidth + 0.01 -ledgeGapWidth]) {
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cube([ledgeGapDepth + 0.01, ledgeGapHeight, ledgeGapWidth + 0.01]);
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}
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}
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}
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