longboard_mount.scad

$material_thickness = 4;

$motor_diameter = 49;
$axle_diameter = 15;
$distance = 90;

rotate([-90,0,0]) mount();
translate([$distance/2,-5,0])
rotate([0,180,0])
coupler();

module coupler() {
    $fn = 64;
    
    translate([0,12.5,0]) 
    rotate([-90,0,0])
    linear_extrude($material_thickness) {
        difference() {
            intersection() {
                square([$axle_diameter*2, $axle_diameter+14], center=true);
                circle(25*0.95);
            }
            
            hull() {
                translate([-$axle_diameter,0,0]) circle($axle_diameter/2);
                translate([-$axle_diameter/2,0,0]) circle($axle_diameter/2);
            }
            
            translate([5,$axle_diameter/2 + 3.5,0]) circle(2);
            translate([-5,$axle_diameter/2 + 3.5,0]) circle(2);
            translate([5,-$axle_diameter/2 - 3.5,0]) circle(2);
            translate([-5,-$axle_diameter/2 - 3.5,0]) circle(2);
        }
    }
    
    rotate([0,90,0])
    difference() {
        linear_extrude($axle_diameter) {
            difference() {
                square([$axle_diameter,25], center=true);
                translate([0,-7,0]) circle(2);
                translate([0,7,0]) circle(2);
            }
        }
        translate([0,0,$axle_diameter-4])
        linear_extrude(4) {
            translate([0,-7,0]) circle(4);
            translate([0,7,0]) circle(4);
        }
    }
}

module mount() {
    difference() {
        hull() {
            translate([$distance/2,0,0]) axle_mount();
            translate([-$distance/2,0,0]) motor_mount();
        }
        
        translate([$distance/2,0,0]) axle_mount_holes();
        translate([-$distance/2,0,0]) rotate([0,0,45]) motor_mount_holes();
    }
}

module axle_mount() {
    linear_extrude($material_thickness) {
        difference() {
            intersection() {
                square([25, $axle_diameter + 14], center=true);
                circle(($axle_diameter + 14)*0.6);
            }
        }
    }
}

module axle_mount_holes() {
    $fn = 64;
    
    $diameter = 4;
    $d1 = ($axle_diameter + 7) / 2;
    
    linear_extrude($material_thickness) {
        hull() {
            translate([$d1-3.5, $d1]) circle($diameter/2);
            translate([-$d1, $d1]) circle($diameter/2);
        }
        hull() {
            translate([$d1-3.5, -$d1]) circle($diameter/2);
            translate([-$d1, -$d1]) circle($diameter/2);
        }
        hull() {
            translate([-10,0,0]) square($axle_diameter, center=true);
            translate([25,0,0]) square($axle_diameter, center=true);
        }
    }
}

module motor_mount() {
    $width = $motor_diameter;
    motor_mount_base($width);
}

module motor_mount_base(width) {
    linear_extrude($material_thickness)
        circle($width/2);
}

module motor_mount_holes() {
    $fn = 64;
    
    $diameter = 3;
    $d1 =  $motor_diameter * 0.25;
    $d2 = $d1;
    
    linear_extrude($material_thickness) circle(5);
        
    linear_extrude($material_thickness) {
        translate([$d1, $d1])
            circle($diameter/2);
        translate([-$d1, -$d1])
            circle($diameter/2);
        translate([$d2, -$d2])
            circle($diameter/2);
        translate([-$d2, $d2])
            circle($diameter/2);
    }
    
    translate([0,0,$material_thickness/2]) {
        linear_extrude($material_thickness/2) {
            translate([$d1, $d1])
                circle($diameter);
            translate([-$d1, -$d1])
                circle($diameter);
            translate([$d2, -$d2])
                circle($diameter);
            translate([-$d2, $d2])
                circle($diameter);
        }
    }
}