5 tube_dia = 27.5 + 1.625;
10 lockshaft_dia = 14.35;
24 mountscrew_dia = 4 + 0.5;
25 clipbolt_dia = 5 + 0.1;
35 lockshaft_r = [1, 1] * lockshaft_dia / 2;
38 tube_or = tube_dia/2 + tube_th;
39 back_ohw = back_gap/2 + backflange_th;
40 backflange_ymin = tube_or+backflange_d;
42 lock_0y = tube_dia/2 + lock_d/2 + midweb_d;
43 lock_0x = lock_w/2 - lock_d/2;
44 lock_0 = [lock_0x,lock_0y];
46 lock_or = [lock_w, lock_d]/2 + [front_th,front_th];
48 module oval(sz){ // sz[0] > sz[1]
53 translate([sx * (xr-yr), 0])
60 R = tube_or + join_cr;
61 r = lock_or[1] + join_cr;
62 d = dist2d( [0,0], lock_0 );
63 x = (d*d - r*r + R*R) / (2*d);
64 y = sqrt( R*R - x*x );
66 echo(lock_0x, lock_0y, R,r, d, x,y);
70 rotate(atan2(lock_0y, lock_0x)) {
82 translate([-back_ohw,0]) mirror([0,1])
83 square([back_ohw*2, backflange_ymin]);
85 translate([0, lock_0y]){
91 polygon([[0,0], lock_0, [-lock_0[0], lock_0[1]]]);
95 circle(r = tube_dia/2);
96 translate([-back_gap/2,1]) mirror([0,1])
97 square([back_gap, backflange_ymin+2]);
99 translate([0, lock_0y]){
100 oval([lock_w/2, lock_d/2]);
107 lockshaft_or = lockshaft_r + [clip_th,clip_th];
108 cliprecess_ymax = cliprecess_h - lockshaft_r[1];
109 clip_ymin = cliprecess_ymax - total_h;
110 clip_ogap = clip_gap + clip_th*2;
112 module ClipElevationPositive(){
115 translate([0, -lockshaft_or[1] * sqrt(2)])
116 square(center=true, 0.5);
118 translate([-lockshaft_or[0], 0])
119 square([lockshaft_or[0]*2, cliprecess_ymax]);
120 translate([-clip_ogap/2, 0]) mirror([0,1]) square([clip_ogap, -clip_ymin]);
123 module ClipElevationNegative(){
125 for (y=[0, cliprecess_ymax+1])
129 translate([-clip_gap/2, 1]) mirror([0,1]) square([clip_gap, 2-clip_ymin]);
132 module ClipElevation(){
134 ClipElevationPositive(1);
135 ClipElevationNegative(0);
139 module ExtrudeClipElevation(extra=0){
141 lock_0y + lock_d/2 + clip_d + extra,
144 linear_extrude(height= clip_d + extra*2, convexity=100)
148 module ThroughHole(r, y, z) {
149 translate([-50, y, z])
151 cylinder(r=r, h=100, $fn=20);
154 module ThroughHoles(){
155 for (z=[ 1/4, 3/4 ]) {
156 ThroughHole( mountscrew_dia/2,
157 -tube_or -0.5*backflange_d,
161 ThroughHole( clipbolt_dia/2,
162 lock_0y + lock_d/2 + clip_d/2 + front_th/2,
163 total_h - cliprecess_h - clip_th - clip_d/2 );
166 module MainPositive(){
169 linear_extrude(height=total_h, convexity=100) MainPlan();
170 ExtrudeClipElevation() ClipElevationPositive();
172 ExtrudeClipElevation(1) ClipElevationNegative();
176 module Bracket(){ //// toplevel
183 module TestTopEdge(){ //// toplevel
185 translate([0,0, -total_h])
188 translate([-200,-200,0])
193 module TestClipBoltHole(){ //// toplevel
196 translate([0, 0, -5])
198 translate([-4, lock_0y + lock_d/2 + 1, 0])
201 translate([-200, lock_0y + lock_d/2 + 0.1])
202 cube([400, 400, total_h-20]);
207 //ClipElevationPositive();
212 //TestClipBoltHole();