84 lines
3.1 KiB
OpenSCAD
84 lines
3.1 KiB
OpenSCAD
//
|
|
// NopSCADlib Copyright Chris Palmer 2018
|
|
// nop.head@gmail.com
|
|
// hydraraptor.blogspot.com
|
|
//
|
|
// This file is part of NopSCADlib.
|
|
//
|
|
// NopSCADlib is free software: you can redistribute it and/or modify it under the terms of the
|
|
// GNU General Public License as published by the Free Software Foundation, either version 3 of
|
|
// the License, or (at your option) any later version.
|
|
//
|
|
// NopSCADlib is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
|
|
// without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
|
|
// See the GNU General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU General Public License along with NopSCADlib.
|
|
// If not, see <https://www.gnu.org/licenses/>.
|
|
//
|
|
|
|
//
|
|
//! Simple model of ball bearings with seals, the colour of which can be specified. If silver they are assumed to be metal and the
|
|
//! part number gets a ZZ suffix. Any other colour is assumed to be rubber and the suffix is -2RS.
|
|
//!
|
|
//! If a ball bearing has a child it is placed on its top surface, the same as nuts and washers, etc.
|
|
//!
|
|
//! Also single bearing balls are modelled as just a silver sphere and a BOM entry.
|
|
//
|
|
include <../utils/core/core.scad>
|
|
include <../utils/tube.scad>
|
|
|
|
function bb_name(type) = type[0]; //! Part code without shield type suffix
|
|
function bb_bore(type) = type[1]; //! Internal diameter
|
|
function bb_diameter(type) = type[2]; //! External diameter
|
|
function bb_width(type) = type[3]; //! Width
|
|
function bb_colour(type) = type[4]; //! Shield colour, "silver" for metal
|
|
function bb_rim(type) = type[5]; //! Outer rim thickness guesstimate
|
|
function bb_hub(type) = type[6]; //! Inner rim thickness guesstimate
|
|
|
|
module ball_bearing(type) { //! Draw a ball bearing
|
|
shield = bb_colour(type);
|
|
suffix = shield == "silver" ? "ZZ " : "-2RS ";
|
|
vitamin(str("ball_bearing(BB", bb_name(type), "): Ball bearing ", bb_name(type), suffix, bb_bore(type), "mm x ", bb_diameter(type), "mm x ", bb_width(type), "mm"));
|
|
rim = bb_rim(type);
|
|
hub = bb_hub(type);
|
|
h = bb_width(type);
|
|
or = bb_diameter(type) / 2;
|
|
ir = bb_bore(type) / 2;
|
|
|
|
color("silver") {
|
|
$fn = 360;
|
|
|
|
rim_chamfer = rim / 6;
|
|
rotate_extrude()
|
|
hull() {
|
|
translate([or - rim, -h / 2 + rim_chamfer])
|
|
square([rim, h - 2 * rim_chamfer]);
|
|
|
|
translate([or - rim, -h / 2])
|
|
square([rim - rim_chamfer, h]);
|
|
}
|
|
|
|
hub_chamfer = hub / 6;
|
|
rotate_extrude()
|
|
hull() {
|
|
translate([ir, -h / 2 + hub_chamfer])
|
|
square([hub, h - 2 * hub_chamfer]);
|
|
|
|
translate([ir + hub_chamfer, -h / 2])
|
|
square([hub - hub_chamfer, h]);
|
|
}
|
|
}
|
|
|
|
color(shield) tube(or - rim - eps, ir + hub + eps, h - 1);
|
|
|
|
if($children)
|
|
translate_z(bb_width(type) / 2)
|
|
children();
|
|
}
|
|
|
|
module bearing_ball(dia) { //! Draw a steel bearing ball
|
|
vitamin(str(" bearing_ball(", dia, "): Steel ball ", dia, "mm"));
|
|
color("silver") sphere(d = dia);
|
|
}
|