X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=scaffold-clamp-common.scad;h=3fee76b0e47af0d25c8b4fefc65865a01f434598;hb=593b000b64faf2c6e5888cff8d91379c16aad171;hp=dd714d490216cb0d26dc77164e2ea0979cdb0020;hpb=d5e5d1beef338e3c74cf5f4f436c009606aebd42;p=reprap-play.git

diff --git a/scaffold-clamp-common.scad b/scaffold-clamp-common.scad
index dd714d4..3fee76b 100644
--- a/scaffold-clamp-common.scad
+++ b/scaffold-clamp-common.scad
@@ -13,16 +13,38 @@ smooth_r = 15;
 bolt_dia = 5 + 0.75;
 bolt_flat = 10 + 1;
 
+nbolts = 2;
+
 open_gap = 10;
 
 hinge_unit = 10;
 hinge_z_gap = 1;
 
-// calculated
+hinge_units = 4;
+
+// ---------- vhook ----------
+
+vhook_th = 14;
+
+// ---------- hhook ----------
+
+hhook_inside = 40;
+hhook_th = 4;
+hhook_l = 40;
 
+// ========== defaults ==========
+
+pin_head_th = th/2;
 pin_dia = th;
+pin_hole_dia = pin_dia/2;
+pin_tail = pin_hole_dia + pin_head_th + hinge_z_gap*3;
+
+// ========== calculated ==========
+
 hole_dia = th + pin_gap;
 
+main_r = tube_dia/2 + th;
+
 hinge_gap = pin_gap;
 
 hinge_o_r = 0.5 * hole_dia + th;
@@ -41,6 +63,25 @@ max_z = +total_z/2;
 
 pin_flatten = pin_dia/2 * (1 - cos(45));
 
+bolt_stride = total_z / nbolts;
+
+// calculated - vhook
+
+vhook_inside = 15;
+
+vhook_theta = atan2( smooth_r, main_r );
+
+vhook_y0 = -max(main_r, (tube_dia/2 + vhook_th));
+vhook_ctr = vhook_y0 - vhook_inside/2;
+vhook_outer_dia = vhook_inside + vhook_th*2;
+
+// calculated - hhook
+
+hhook_outer_dia = hhook_inside + hhook_th*2;
+
+hhook_ctr = -max(main_r + hhook_inside/2,
+		 tube_dia/2 + hhook_outer_dia/2);
+
 $fa = 3;
 $fs = 0.1;
 
@@ -49,7 +90,7 @@ module SmoothPlan(){
 }
 
 module TubePlan(){ circle(r = tube_dia/2); }
-module MainCirclePlan(){ circle(r = tube_dia/2 + th); }
+module MainCirclePlan(){ circle(r = main_r); }
 
 module PlanWeldMainCircle(){
   intersection(){
@@ -118,8 +159,8 @@ module HalfClampX(flatten=false){
 	  linextr(0, hinge_unit) MainPlanA(flatten);
       }
     }
-    for (dz=[-1,+1]) {
-      translate([ bolt_x, 0, dz * total_z/4 ]) {
+    for (j=[0:nbolts-1]) {
+      translate([ bolt_x, 0, min_z + (j + 0.5) * bolt_stride ]) {
 	translate([0, -tube_dia/2, 0])
 	  rotate([-90,0,0])
 	  cylinder(r= bolt_dia/2, h= tube_dia);
@@ -131,16 +172,121 @@ module HalfClampX(flatten=false){
   }
 }
 
-module GeneralPlanDemo(){ ////toplevel
-  MainPlan();
-  translate([0,0,-4]) color("red") Portion(1);
-  translate([0,0,-2]) color("grey") Portion(0);
+// ---------- vhook ----------
 
-  translate([0, tube_dia*1.5]) {
-    MainPlanB();
-    MainPlanA();
+module VHookProfile() {
+  translate([0, -vhook_inside/2 - vhook_th/2])
+    circle(r = vhook_th/2);
+}
+
+module VHookHookMain(outer=false){ ////toplevel
+  rotate([0,90,0])
+    rotate_extrude(convexity=10)
+    rotate([0,0,90])
+    hull(){
+      VHookProfile();
+      if (outer) {
+	translate([0,-vhook_outer_dia]) square(center=true, vhook_th);
+      }
+    }
+}
+
+module VHookPartA(){ ////toplevel
+  DummyA();
+
+  translate([0, vhook_ctr, 0]){
+    for (m=[0,1]) {
+      mirror([0, m, 0]) {
+	linextr(-0.1, vhook_outer_dia/2)
+	  VHookProfile();
+	translate([0, -vhook_inside/2 -vhook_th/2, vhook_outer_dia/2])
+	  sphere(r= vhook_th/2);
+      }
+    }
+
+    intersection(){
+      VHookHookMain(outer=true);
+      linextr_y_xz(0, vhook_outer_dia/2) hull(){
+	VHookProfile();
+	translate([0,-0.1]) square(center=true, [vhook_th, 0.2]);
+      }
+    }
+
+    intersection(){
+      VHookHookMain();
+      translate([0,0, -vhook_outer_dia])
+	cube(center=true, vhook_outer_dia*2);
+    }
+  }
+
+  //translate([0, vhook_y0, 50]) rotate([0,0,-90]) color("black") cube(10);
+  // translate([0,0,-150]) rotate([0,0,180 + theta]) color("blue") cube(100);
+}
+
+module VHookPlanDemo(){
+  MainPlanA();
+  translate([0, vhook_ctr, 5])
+    for (m=[0,1]) {
+      mirror([0,m])
+	color("blue") VHookProfile();
+    }
+}
+
+// ---------- hhook ----------
+
+module HHookHookPlan(){
+  translate([0, hhook_ctr]){
+    difference(){
+      circle(r = hhook_outer_dia/2);
+      circle(r = hhook_inside/2);
+      rectfromto([+hhook_outer_dia, -hhook_outer_dia],
+		 [0,                +hhook_outer_dia]);
+    }
+    translate([0, -(hhook_inside/2 + hhook_th/2)]){
+      hull(){
+	for (x=[-0.1, hhook_l]) {
+	  translate([x,0]) square(center=true, hhook_th);
+	}
+      }
+    }
+  }
+}
+
+module HHookPartA(){ ////toplevel
+  DummyA();
+  linextr(min_z, max_z) {
+    HHookHookPlan();
+  }
+}
+
+module HHookPlanDemo(){
+  MainPlanA();
+  HHookHookPlan();
+}
+
+// ---------- misc ----------
+
+module PinSitu(){ ////toplevel
+  difference(){
+    union(){
+      translate([0,0, -pin_head_th])
+	cylinder(r= pin_dia/2, h = total_z + pin_head_th + pin_tail);
+      mirror([0,0,1])
+	cylinder(r= hinge_o_r - pin_gap, h = pin_head_th);
+    }
+    translate([0,0, total_z + pin_tail/2])
+      rotate([0,90,0])
+      translate([0,0, -pin_dia])
+      cylinder(r= pin_hole_dia/2, h=pin_dia*2);
+    translate([pin_dia/2 * cos(45), -50, -pin_head_th*2])
+      cube([50,100, total_z*2]);
+  }
+}
+
+module Pin(){ ////toplevel
+  rotate([0,90,0]) {
+    PinSitu();
   }
-//  translate([max_x - hinge_x + 20, 0]) color("blue") MainPlanA();
 }
 
 module GeneralB(){ ////toplevel
@@ -151,9 +297,30 @@ module DummyA(){ ////toplevel
   HalfClampX();
 }
 
+module PlanDemo(){ ////toplevel
+  MainPlan();
+  translate([0,0,-4]) color("red") Portion(1);
+  translate([0,0,-2]) color("grey") Portion(0);
+
+  translate([0, tube_dia*1.5]) {
+    MainPlanB();
+    MainPlanA();
+  }
+
+  translate([0, -tube_dia*1.5]) {
+    VHookPlanDemo();
+  }
+  translate([tube_dia*4, 0]) {
+    HHookPlanDemo();
+  }
+//  translate([max_x - hinge_x + 20, 0]) color("blue") MainPlanA();
+}
+
 module Demo(){ ////toplevel
   color("red") rotate([180,0,0]) GeneralB();
   color("blue") DummyA();
+  color("orange") translate([hinge_x, 0, min_z - hinge_z_gap])
+    rotate([0,0,180]) PinSitu();
 }
 
 //PlanDemo();