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add torsen diff mount

master
Vitaliy Filippov 2015-11-16 23:02:06 +00:00
parent 93e45dedd6
commit 17820e8a64
1 changed files with 176 additions and 0 deletions
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$fn = 100;
union() {
difference() {
/* union() {
import("/var/home/vitali/LEGO Creations/cad/gear_36_bevel.stl");
rotate([90, 0, 0]) cylinder(r=16, h=9, center=true, $fn=100);
}*/
//import("/var/home/vitali/LEGO Creations/cad/gear_36_solid_pre.stl");
rotate([90, 0, 0]) double_bevel_36t();
translate([0, 5, 0]) rotate([90, 0, 0]) cylinder(r=30, h=2, center=true, $fn=100);
translate([0, -5, 0]) rotate([90, 0, 0]) cylinder(r=30, h=2, center=true, $fn=100);
rotate([90, 0, 0]) cylinder(r=2.5, h=10, center=true);
}
translate([0, 0, 8]) difference() {
union() {
hull() {
translate([0, 8, 0]) rotate([90, 0, 90]) cylinder(r=3.2, h=8, center=true);
translate([0, 0, 0]) rotate([90, 0, 90]) cylinder(r=3.2, h=8, center=true);
}
hull() {
translate([-3.6, 8, 0]) rotate([90, 0, 90]) cylinder(r=4, h=0.8, center=true);
translate([-3.6, 0, 0]) rotate([90, 0, 90]) cylinder(r=4, h=0.8, center=true);
}
hull() {
translate([3.6, 8, 0]) rotate([90, 0, 90]) cylinder(r=4, h=0.8, center=true);
translate([3.6, 0, 0]) rotate([90, 0, 90]) cylinder(r=4, h=0.8, center=true);
}
translate([0, 8, 0]) rotate([90, 0, 90]) axle(h=16, axlemesh=1.75);
/*intersection() {
union() {
hull() {
translate([-10, 8, 0]) rotate([90, 0, 90]) cylinder(r=4, h=4, center=true);
translate([-10, 0, 0]) rotate([90, 0, 90]) cylinder(r=4, h=4, center=true);
}
hull() {
translate([10, 8, 0]) rotate([90, 0, 90]) cylinder(r=4, h=4, center=true);
translate([10, 0, 0]) rotate([90, 0, 90]) cylinder(r=4, h=4, center=true);
}
hull() {
translate([-10, 8, -16]) rotate([90, 0, 90]) cylinder(r=4, h=4, center=true);
translate([-10, 0, -16]) rotate([90, 0, 90]) cylinder(r=4, h=4, center=true);
}
hull() {
translate([10, 8, -16]) rotate([90, 0, 90]) cylinder(r=4, h=4, center=true);
translate([10, 0, -16]) rotate([90, 0, 90]) cylinder(r=4, h=4, center=true);
}
}
translate([0, 0, -8]) rotate([90, 0, 0]) cylinder(r=16, h=30, center=true);
}*/
}
//translate([0, 8, 0]) rotate([90, 0, 90]) axle(h=40);
//translate([0, 8, 0]) rotate([90, 0, 90]) cylinder(r=2.5, h=40, center=true);
}
translate([0, 0, -8]) difference() {
union() {
hull() {
translate([0, 8, 0]) rotate([90, 0, 90]) cylinder(r=3.2, h=8, center=true);
translate([0, 0, 0]) rotate([90, 0, 90]) cylinder(r=3.2, h=8, center=true);
}
hull() {
translate([-3.6, 8, 0]) rotate([90, 0, 90]) cylinder(r=4, h=0.8, center=true);
translate([-3.6, 0, 0]) rotate([90, 0, 90]) cylinder(r=4, h=0.8, center=true);
}
hull() {
translate([3.6, 8, 0]) rotate([90, 0, 90]) cylinder(r=4, h=0.8, center=true);
translate([3.6, 0, 0]) rotate([90, 0, 90]) cylinder(r=4, h=0.8, center=true);
}
translate([0, 8, 0]) rotate([90, 0, 90]) axle(h=16, axlemesh=1.75);
}
//translate([0, 8, 0]) rotate([90, 0, 90]) axle();
}
}
module axle(h = 24, axleradius = 2.4, axlemesh = 1.85, axleround = 0)
{
if (axleround > 0)
{
minkowski() {
union() {
cube([axleradius*2-axleround*2, axlemesh-axleround*2, h-axleround*2], center=true);
cube([axlemesh-axleround*2, axleradius*2-axleround*2, h-axleround*2], center=true);
}
cylinder(r=axleround, h=axleround, $fn=4);
}
}
else
{
union() {
cube([axleradius*2-axleround*2, axlemesh-axleround*2, h], center=true);
cube([axlemesh-axleround*2, axleradius*2-axleround*2, h], center=true);
}
}
}
// An attempt to make something like standard 36t double bevel gear...
module double_bevel_36t() {
intersection() {
union() {
translate([0, 0, 1.5])
linear_extrude(slices=5, height=2.5, scale=(36/2+1-2.5*tan(45))/(36/2+1))
gear_concat_flat(mm_per_tooth=3.53, number_of_teeth=36, backlash=2, clearance=0.8, trim_factor=0.7);
translate([0, 0, -1.5])
rotate([180, 0, 0])
linear_extrude(slices=5, height=2.5, scale=(36/2+1-2.5*tan(45))/(36/2+1))
gear_concat_flat(mm_per_tooth=3.53, number_of_teeth=36, backlash=2, clearance=0.8, trim_factor=0.7);
translate([0, 0, -4])
cylinder($fn=48, h=8, r=3.14*(36/2-1)/3.1415926);
translate([0, 0, -1.5])
cylinder($fn=48, h=3, r=3.14*(36/2+1)/3.1415926);
}
translate([0, 0, -8]) linear_extrude(slices=5, height=16)
gear_concat_flat(mm_per_tooth=3.14, number_of_teeth=36);
}
}
// Same in 2D (non-extruded)
module gear_concat_flat(
mm_per_tooth = 3, //this is the "circular pitch", the circumference of the pitch circle divided by the number of teeth
number_of_teeth = 11, //total number of teeth around the entire perimeter
pressure_angle = 28, //Controls how straight or bulged the tooth sides are. In degrees.
clearance = 0.0, //gap between top of a tooth on one gear and bottom of valley on a meshing gear (in millimeters)
backlash = 0.0, //gap between two meshing teeth, in the direction along the circumference of the pitch circle
trim_factor = 1
) {
pi = 3.1415926;
p = mm_per_tooth * number_of_teeth / pi / 2; //radius of pitch circle
c = p + mm_per_tooth / pi - clearance; //radius of outer circle
b = p*cos(pressure_angle); //radius of base circle
r = p-(c-p)-clearance; //radius of root circle
t = mm_per_tooth/2-backlash/2; //tooth thickness at pitch circle
k = -iang(b, p) - t/2/p/pi*180; //angle to where involute meets base circle on each side of tooth
polygon(
points = gear_points_trimmed(r, b, c, k, number_of_teeth, number_of_teeth, trim_factor),
paths = [ range(15*(number_of_teeth)) ]
);
};
function gear_points_trimmed(r, b, c, k, number_of_teeth, i, f) =
(i <= 0 ? [] : concat(
gear_points_trimmed(r, b, c, k, number_of_teeth, i-1, f),
tooth_base_points_trimmed(r, b, c, k, number_of_teeth, i, f)
));
function tooth_base_points_trimmed(r, b, c, k, number_of_teeth, i, f) =
(r < b ? concat(
[ polar(r*f, i*360/number_of_teeth + k) ],
tooth_points(r, b, c, k, number_of_teeth, i),
[ polar(r*f, i*360/number_of_teeth - k),
polar(r*f, i*360/number_of_teeth + 180/number_of_teeth) ]
) : concat(
tooth_points(r, b, c, k, number_of_teeth, i),
[ polar(r*f, i*360/number_of_teeth + 180/number_of_teeth) ]
));
function tooth_points(r, b, c, k, number_of_teeth, i) = [
q7r(0/5,r,b,c,k,1,i*360/number_of_teeth),
q7r(1/5,r,b,c,k,1,i*360/number_of_teeth),
q7r(2/5,r,b,c,k,1,i*360/number_of_teeth),
q7r(3/5,r,b,c,k,1,i*360/number_of_teeth),
q7r(4/5,r,b,c,k,1,i*360/number_of_teeth),
q7r(5/5,r,b,c,k,1,i*360/number_of_teeth),
q7r(5/5,r,b,c,k,-1,i*360/number_of_teeth),
q7r(4/5,r,b,c,k,-1,i*360/number_of_teeth),
q7r(3/5,r,b,c,k,-1,i*360/number_of_teeth),
q7r(2/5,r,b,c,k,-1,i*360/number_of_teeth),
q7r(1/5,r,b,c,k,-1,i*360/number_of_teeth),
q7r(0/5,r,b,c,k,-1,i*360/number_of_teeth),
];
function range(n) = (n >= 0 ? concat(range(n-1), [n]) : []);
// radius a fraction f up the curved side of the tooth, rotated at 'rot' angle
function q7r(f,r,b,r2,t,s,rot) = q6r(b,s,t,(1-f)*max(b,r)+f*r2,rot);
// point at radius d on the involute curve, rotated at 'rot' angle
function q6r(b,s,t,d,rot) = polar(d,rot+s*(iang(b,d)+t));
// convert polar to cartesian coordinates
function polar(r,theta) = r*[sin(theta), cos(theta)];
//unwind a string this many degrees to go from radius r1 to radius r2
function iang(r1,r2) = sqrt((r2/r1)*(r2/r1) - 1)/3.1415926*180 - acos(r1/r2);