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connector: add support for cycloid gears

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looooo
2021-12-04 14:07:08 +01:00
parent 5846ffbfdc
commit 4aa2559629
2 changed files with 26 additions and 2 deletions
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22
freecad/gears/connector.py
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@@ -21,7 +21,7 @@ import copy
import numpy as np
import FreeCAD
from pygears import __version__
from .features import InvoluteGear
from .features import InvoluteGear, CycloidGear
from pygears.computation import compute_shifted_gears
class ViewProviderGearConnector(object):
@@ -90,7 +90,25 @@ class GearConnector(object):
mat1 = rot * mat0 * rot2 * rot3 * rot4
mat1.move(fp.master_gear.Placement.Base)
fp.slave_gear.Placement = mat1
if isinstance(fp.master_gear.Proxy, CycloidGear) and isinstance(fp.slave_gear.Proxy, CycloidGear):
fp.master_gear.Placement.Rotation.Angle = np.deg2rad(fp.angle2.Value)
angle_master = fp.master_gear.Placement.Rotation.Angle
dw_master = fp.master_gear.dw
dw_slave = fp.slave_gear.dw
dist = (dw_master + dw_slave) / 2
mat0 = FreeCAD.Matrix() # unity matrix
trans = FreeCAD.Vector(dist)
mat0.move(trans)
rot = FreeCAD.Rotation(FreeCAD.Vector(0,0,1), fp.angle1).toMatrix()
angle2 = dw_master / dw_slave * fp.angle1.Value
angle4 = dw_master / dw_slave * np.rad2deg(angle_master)
rot2 = FreeCAD.Rotation(FreeCAD.Vector(0,0,1), angle2).toMatrix()
angle3 = abs(fp.slave_gear.teeth % 2 - 1) * 180. / fp.slave_gear.teeth
rot3 = FreeCAD.Rotation(FreeCAD.Vector(0,0,1), angle3).toMatrix()
rot4 = FreeCAD.Rotation(FreeCAD.Vector(0,0,1), -angle4).toMatrix()
mat1 = rot * mat0 * rot2 * rot3 * rot4
mat1.move(fp.master_gear.Placement.Base)
fp.slave_gear.Placement = mat1
def execute(self, fp):
self.onChanged(fp, None)

6
freecad/gears/features.py
View File

@@ -859,6 +859,7 @@ class CycloidGear(BaseGear):
self.add_fillet_properties(obj)
self.add_tolerance_properties(obj)
self.add_cycloid_properties(obj)
self.add_computed_properties(obj)
obj.gear = self.cycloid_tooth
obj.teeth = 15
obj.module = '1. mm'
@@ -873,6 +874,7 @@ class CycloidGear(BaseGear):
obj.head = 0
obj.head_fillet = 0
obj.root_fillet = 0
obj.dw = obj.module * obj.teeth
obj.Proxy = self
def add_helical_properties(self, obj):
@@ -892,9 +894,13 @@ class CycloidGear(BaseGear):
obj.addProperty("App::PropertyFloat", "inner_diameter", "cycloid", "inner_diameter divided by module (hypocycloid)")
obj.addProperty("App::PropertyFloat", "outer_diameter", "cycloid", "outer_diameter divided by module (epicycloid)")
def add_computed_properties(self, obj):
obj.addProperty("App::PropertyLength", "dw", "computed", "pitch diameter", 1)
def generate_gear_shape(self, fp):
fp.gear.m = fp.module.Value
fp.gear.z = fp.teeth
fp.dw = fp.module * fp.teeth
fp.gear.z1 = fp.inner_diameter
fp.gear.z2 = fp.outer_diameter
fp.gear.clearance = fp.clearance