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130 lines
3.6 KiB
Python
130 lines
3.6 KiB
Python
"""
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Experimental Joint development file
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"""
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from build123d import *
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from ocp_vscode import *
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class JointBox(Solid):
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"""A filleted box with joints
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A box of the given dimensions with all of the edges filleted.
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Args:
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length (float): box length
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width (float): box width
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height (float): box height
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radius (float): edge radius
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taper (float): vertical taper in degrees
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"""
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def __init__(
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self,
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length: float,
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width: float,
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height: float,
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radius: float = 0.0,
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taper: float = 0.0,
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):
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# Create the object
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with BuildPart() as obj:
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with BuildSketch():
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Rectangle(length, width)
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extrude(amount=height, taper=taper)
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if radius != 0.0:
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fillet(obj.part.edges(), radius=radius)
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Cylinder(width / 4, length, rotation=(0, 90, 0), mode=Mode.SUBTRACT)
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# Initialize the Solid class with the new OCCT object
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super().__init__(obj.part.wrapped)
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#
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# Base Object
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#
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# base = JointBox(10, 10, 10)
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# base = JointBox(10, 10, 10).locate(Location(Vector(1, 1, 1)))
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# base = JointBox(10, 10, 10).locate(Location(Vector(1, 1, 1), (1, 0, 0), 5))
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base: JointBox = JointBox(10, 10, 10, taper=3).locate(
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Location(Vector(1, 1, 1), (1, 1, 1), 30)
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)
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base_top_edges: ShapeList[Edge] = (
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base.edges().filter_by(Axis.X, tolerance=30).sort_by(Axis.Z)[-2:]
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)
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#
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# Rigid Joint
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#
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fixed_arm = JointBox(1, 1, 5, 0.2)
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j1 = RigidJoint("side", base, Plane(base.faces().sort_by(Axis.X)[-1]).location)
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j2 = RigidJoint(
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"top", fixed_arm, (-Plane(fixed_arm.faces().sort_by(Axis.Z)[-1])).location
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)
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base.joints["side"].connect_to(fixed_arm.joints["top"])
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# or
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# j1.connect_to(j2)
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#
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# Hinge
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#
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hinge_arm = JointBox(2, 1, 10, taper=1)
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swing_arm_hinge_edge: Edge = (
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hinge_arm.edges()
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.group_by(SortBy.LENGTH)[-1]
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.sort_by(Axis.X)[-2:]
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.sort_by(Axis.Y)[0]
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)
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swing_arm_hinge_axis = Axis(swing_arm_hinge_edge)
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base_corner_edge = base.edges().sort_by(Axis((0, 0, 0), (1, 1, 0)))[-1]
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base_hinge_axis = Axis(base_corner_edge)
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j3 = RevoluteJoint("hinge", base, axis=base_hinge_axis, angular_range=(0, 180))
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j4 = RigidJoint("corner", hinge_arm, swing_arm_hinge_axis.location)
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base.joints["hinge"].connect_to(hinge_arm.joints["corner"], angle=90)
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#
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# Slider
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#
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slider_arm = JointBox(4, 1, 2, 0.2)
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s1 = LinearJoint(
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"slide",
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base,
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axis=Axis(Edge.make_mid_way(*base_top_edges, 0.67)),
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linear_range=(0, base_top_edges[0].length),
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)
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s2 = RigidJoint("slide", slider_arm, Location(Vector(0, 0, 0)))
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base.joints["slide"].connect_to(slider_arm.joints["slide"], position=8)
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# s1.connect_to(s2,8)
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#
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# Cylindrical
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#
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hole_axis = Axis(
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base.faces().sort_by(Axis.Y)[0].center(),
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-base.faces().sort_by(Axis.Y)[0].normal_at(),
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)
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screw_arm = JointBox(1, 1, 10, 0.49)
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j5 = CylindricalJoint("hole", base, hole_axis, linear_range=(-10, 10))
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j6 = RigidJoint("screw", screw_arm, screw_arm.faces().sort_by(Axis.Z)[-1].location)
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j5.connect_to(j6, position=-1, angle=90)
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#
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# PinSlotJoint
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#
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j7 = LinearJoint(
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"slot",
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base,
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axis=Axis(Edge.make_mid_way(*base_top_edges, 0.33)),
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linear_range=(0, base_top_edges[0].length),
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)
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pin_arm = JointBox(2, 1, 2)
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j8 = RevoluteJoint("pin", pin_arm, axis=Axis.Z, angular_range=(0, 360))
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j7.connect_to(j8, position=6, angle=60)
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#
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# BallJoint
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#
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j9 = BallJoint("socket", base, Plane(base.faces().sort_by(Axis.X)[0]).location)
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ball = JointBox(2, 2, 2, 0.99)
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j10 = RigidJoint("ball", ball, Location(Vector(0, 0, 1)))
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j9.connect_to(j10, angles=(10, 20, 30))
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show_all(render_joints=True, transparent=True)
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