topeak-seatstay-lock.scad

   1 // -*- C -*-
   2
   3 pump_dia = 27;
   4 seatstay_mindia = 14;
   5 seatstay_maxdia = 19;
   6 pump_seatstay_gap = 12.3;
   7 pump_seatstay_delta = 0.1;
   8 holes_rotation = 7;
   9
  10 body_thick_x = 5;
  11 body_thick_y = 5;
  12
  13 pin_workdepth = 15;
  14 pin_width = 11 + 0.5;
  15 pin_thick = 3 + 0.4;
  16
  17 // computed
  18
  19 body_depth = pin_width + 8;
  20
  21 module Holes(){
  22   translate([0, -pump_dia/2]);
  23   rotate(-holes_rotation){
  24     translate([-(pump_seatstay_gap/2 + pump_dia/2),
  25                0])
  26       circle(r=pump_dia/2);
  27     translate([+(pump_seatstay_gap/2 + seatstay_mindia/2),
  28                pump_dia/2 -seatstay_maxdia/2 -pump_seatstay_delta]) {
  29       hull(){
  30         for (ud=[-1,1])
  31           translate([0, ud * (seatstay_maxdia-seatstay_mindia)/2])
  32             circle(r=seatstay_mindia/2);
  33       }
  34     }
  35   }
  36 }
  37
  38 module BodyPlan(){
  39   hull(){
  40     for(x=[-1,1]) for(y=[-1,1])
  41       translate([x*body_thick_x, y*body_thick_y])
  42         Holes();
  43   }
  44 }
  45
  46 module Body(){
  47   translate([0,0,-body_depth/2])
  48     linear_extrude(height=body_depth){
  49     difference(){
  50       BodyPlan();
  51       Holes();
  52     }
  53   }
  54 }
  55
  56 Body();