99 lines
3.6 KiB
Python
99 lines
3.6 KiB
Python
#!/usr/bin/env python3
|
|
# Copyright (C) 2013-2016 Florian Festi
|
|
#
|
|
# This program 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.
|
|
#
|
|
# This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
from boxes import *
|
|
|
|
|
|
class GearBox(Boxes):
|
|
"""Gearbox with multiple identical stages"""
|
|
|
|
ui_group = "Part"
|
|
|
|
def __init__(self):
|
|
Boxes.__init__(self)
|
|
self.addSettingsArgs(edges.FingerJointSettings)
|
|
self.argparser.add_argument(
|
|
"--teeth1", action="store", type=int, default=8,
|
|
help="number of teeth on ingoing shaft")
|
|
self.argparser.add_argument(
|
|
"--teeth2", action="store", type=int, default=20,
|
|
help="number of teeth on outgoing shaft")
|
|
self.argparser.add_argument(
|
|
"--modulus", action="store", type=float, default=3,
|
|
help="modulus of the theeth in mm")
|
|
self.argparser.add_argument(
|
|
"--shaft", action="store", type=float, default=6.,
|
|
help="diameter of the shaft")
|
|
self.argparser.add_argument(
|
|
"--stages", action="store", type=int, default=4,
|
|
help="number of stages in the gear reduction")
|
|
|
|
def render(self):
|
|
|
|
if self.teeth2 < self.teeth1:
|
|
self.teeth2, self.teeth1 = self.teeth1, self.teeth2
|
|
|
|
pitch1, size1, xxx = self.gears.sizes(teeth=self.teeth1, dimension=self.modulus)
|
|
pitch2, size2, xxx = self.gears.sizes(teeth=self.teeth2, dimension=self.modulus)
|
|
|
|
t = self.thickness
|
|
x = 1.1 * t * self.stages
|
|
|
|
if self.stages == 1:
|
|
y = size1 + size2
|
|
y1 = y / 2 - (pitch1 + pitch2) + pitch1
|
|
y2 = y / 2 + (pitch1 + pitch2) - pitch2
|
|
else:
|
|
y = 2 * size2
|
|
y1 = y / 2 - (pitch1 + pitch2) / 2
|
|
y2 = y / 2 + (pitch1 + pitch2) / 2
|
|
|
|
h = max(size1, size2) + t
|
|
|
|
b = "F"
|
|
t = "e" # prepare for close box
|
|
mh = self.shaft
|
|
|
|
def sideCB():
|
|
self.hole(y1, h / 2, mh / 2)
|
|
self.hole(y2, h / 2, mh / 2)
|
|
|
|
self.moveTo(self.thickness, self.thickness)
|
|
self.rectangularWall(y, h, [b, "f", t, "f"], callback=[sideCB], move="right")
|
|
self.rectangularWall(x, h, [b, "F", t, "F"], move="up")
|
|
self.rectangularWall(x, h, [b, "F", t, "F"])
|
|
self.rectangularWall(y, h, [b, "f", t, "f"], callback=[sideCB], move="left")
|
|
self.rectangularWall(x, h, [b, "F", t, "F"], move="up only")
|
|
|
|
self.rectangularWall(x, y, "ffff", move="up")
|
|
|
|
profile_shift = 20
|
|
pressure_angle = 20
|
|
|
|
for i in range(self.stages - 1):
|
|
self.gears(teeth=self.teeth2, dimension=self.modulus, angle=pressure_angle,
|
|
mount_hole=mh, profile_shift=profile_shift, move="up")
|
|
|
|
self.gears(teeth=self.teeth2, dimension=self.modulus, angle=pressure_angle,
|
|
mount_hole=mh, profile_shift=profile_shift, move="right")
|
|
|
|
for i in range(self.stages):
|
|
self.gears(teeth=self.teeth1, dimension=self.modulus, angle=pressure_angle,
|
|
mount_hole=mh, profile_shift=profile_shift, move="down")
|
|
|
|
|
|
|