Lüfterhalter

module a()
{
        rotate (90) difference() {
                cube([40,40,5]);
                union() {
                        translate([20, 20, 0])
                        cylinder(h = 50, r = 19);
                        translate([36, 4, 0])
                        cylinder(h = 50, r = 1.6);
                        translate([4, 36, 0])
                        cylinder(h = 50, r = 1.6);
                        translate([4, 4, 0])
                        cylinder(h = 50, r = 1.6);
                        translate([36, 36, 0])
                        cylinder(h = 50, r = 1.6);
                }
        }
}


module kneif()
{


        difference()
        {
                translate([0,0, 0])
                cube([20, 10, 20]);
                translate([17,5, -5])
                cylinder(h = 50, r = 1.6);
                translate([10,2.5,2])
                cube([12, 5,2.4]);
                rotate(a = 90, v = [1, 0, 0])
                {
                        translate([6,10, -45])
                        {
                                cylinder(h = 50, r = 3.9);
                                translate ([0,-3.9,0])
                                cube( [18.4,(3.9*2),50]);
                        }
                }
        }


}
a();
rotate(a = 270, v = [0, 1, 0]) translate([0,0, 40]) kneif();
rotate(a = 270, v = [0, 1, 0]) translate([0, 30, 40]) kneif();