box_frame/extras/gear-small.scad

   1 // Herringbone extruder gears
   2 // GNU GPL v3
   3 // Václav 'ax' Hůla <axtheb@gmail.com>
   4 // Josef Průša <josefprusa@me.com>
   5
   6 include <../configuration.scad>
   7 use <inc/parametric_involute_gear_v5.0.scad>
   8
   9 small();
  10 %translate([40, 0, 0]) rotate([0, 180, 180]) big(); //this should touch, teeth should mesh
  11
  12 gear_width=14;
  13 teeth_small=13;
  14 teeth_big=37;
  15 teeth_twist=320;
  16 circular_pitch=288;
  17
  18 module small(){
  19     difference() {
  20         union() {
  21             mirror([ 0, 0, 1 ]) gear (number_of_teeth=teeth_small,
  22                     circular_pitch=circular_pitch,
  23                     gear_thickness = gear_width/2,
  24                     rim_thickness = gear_width/2,
  25                     hub_thickness = 0,
  26                     hub_diameter = 18,
  27                     bore_diameter = 5.25,
  28                     circles=0,
  29                     twist = teeth_twist/teeth_small);
  30             gear (number_of_teeth=teeth_small,
  31                     circular_pitch=circular_pitch,
  32                     gear_thickness = gear_width/2,
  33                     rim_thickness = gear_width/2,
  34                     hub_thickness = 0,
  35                     hub_diameter = 18,
  36                     bore_diameter = 5.25,
  37                     circles=0,
  38                     twist = teeth_twist/teeth_small);
  39             //hub. Two part to make it thicker
  40             translate([0, 0, gear_width / 2]) {
  41                 cylinder(r1=8.5, r2=11, h=3);
  42             }
  43             translate([0, 0, gear_width / 2 + 3]) {
  44                 cylinder(r=11, h=6);
  45             }
  46         }
  47         //bore
  48         translate([0, 0, -gear_width / 2 + 0.1]) cylinder(r=5.25 / 2, h=gear_width + 9.2);
  49
  50         translate([0, 0, gear_width / 2 + 4.5]) rotate([0, 90, 0]) {
  51             cylinder(r=m3_diameter / 2, h=20);
  52             translate([0, 0, 5]) nut(m3_nut_diameter, 2.5, false);
  53             translate([-10, -m3_nut_diameter / 2, 5]) cube([10, m3_nut_diameter, 2.5]);
  54         }
  55     }
  56 }
  57
  58 hole_size=6.6;
  59
  60 module big(){
  61     difference() {
  62         union(){
  63             mirror([0, 0, 1]) gear (number_of_teeth=teeth_big,
  64                     circular_pitch=circular_pitch,
  65                     gear_thickness = gear_width/2,
  66                     rim_thickness = gear_width/2,
  67                     hub_thickness = 0,
  68                     hub_diameter = 18,
  69                     bore_diameter = 18,
  70                     circles=0,
  71                     twist = teeth_twist/teeth_big);
  72             gear (number_of_teeth=teeth_big,
  73                     circular_pitch=circular_pitch,
  74                     gear_thickness = 0,
  75                     rim_thickness = gear_width/2,
  76                     hub_thickness = 0,
  77                     hub_diameter = 18,
  78                     bore_diameter = 18,
  79                     circles=0,
  80                     twist = teeth_twist/teeth_big);
  81         }
  82         //reduce mass
  83         translate([0, 0, layer_height * 9 - gear_width / 2]) rotate([0, 0, 90]) cylinder(r1=23.4, r2=23.4, h=gear_width - layer_height * 9 + 1, $fn=18);
  84         //bore
  85         translate([0, 0, -gear_width / 2 - 0.1]) cylinder(r=m8_diameter / 2, h=gear_width + 9.2);
  86         for (hole=[0:5]) {
  87             rotate([0, 0, 360 / 6 * hole + 30]) translate([17,0,-10]) rotate(12) {
  88                 cylinder(r=hole_size, h=20);
  89                 cube([hole_size, hole_size, 20]);
  90             }
  91         }
  92
  93     }
  94     //threaded bolt trap
  95     difference(){
  96         translate([0, 0, -gear_width / 2]) cylinder(r=10, h=4 + layer_height * 9);
  97         translate([0, 0, -gear_width / 2 + layer_height * 6]) nut(13.3, h=10);
  98         translate([0, 0, -gear_width / 2 - 0.1]) cylinder(r=m8_diameter / 2, h=gear_width + 9.2);
  99     }
 100
 101 }