Spindle geometry

nhf/touhou/yasaka_kanako/onbashira.py

@@ -32,8 +32,12 @@ BOLT_COMMON = FlatHeadBolt(
     pitch=1.0,
 )
 
-@dataclass
+
+@dataclass(frozen=True)
 class Motor(Model):
+    """
+    Drive motor for the main barrel
+    """
 
     mass: float = 589.7
     voltage: float = 12.0 # V
@@ -133,6 +137,8 @@ class Onbashira(Model):
     barrel_wall_thickness: float = 25.4 / 8
     barrel_length: float = 25.4 * 12
 
+    # Gap between the stator edge and the inner face of the barrel
+    stator_gap: float = 10.0
     # Radius from barrel centre to axis
     rotation_radius: float = 66.0
     n_bearing_balls: int = 12
@@ -144,11 +150,12 @@ class Onbashira(Model):
     bearing_track_radius: float = 100.0
     # Gap between the inner and outer bearing disks
     bearing_gap: float = 10.0
+    bearing_spindle_max_diam: float = 13.0
     bearing_disk_thickness: float = 25.4 / 8
 
     rotor_inner_radius: float = 40.0
     rotor_bind_bolt_diam: float = BOLT_COMMON.diam_thread
-    rotor_bind_radius: float = 78.0
+    rotor_bind_radius: float = 82.0
     rotor_spacer_outer_diam: float = 15.0
     stator_bind_radius: float = 135.0
 
@@ -157,6 +164,8 @@ class Onbashira(Model):
     handle_length: float = 80.0
     handle_height: float = 40.0
 
+    motor: Motor = Motor()
+
     material_side: Material = Material.WOOD_BIRCH
     material_bearing: Material = Material.PLASTIC_PLA
     material_spacer: Material = Material.PLASTIC_PLA
@@ -357,6 +366,28 @@ class Onbashira(Model):
         )
         return outer - inner
 
+    @target(name="bearing-spindle")
+    def bearing_spindle(self) -> Cq.Solid:
+        r1 = self.bearing_gap / 2
+        r2 = self.bearing_spindle_max_diam
+        h = self.bearing_disk_gap
+        cone1 = Cq.Solid.makeCone(
+            radius1=r2,
+            radius2=r1,
+            height=h/2
+        )
+        cone2 = Cq.Solid.makeCone(
+            radius1=r1,
+            radius2=r2,
+            height=h/2,
+        )
+        hole = Cq.Solid.makeCylinder(
+            radius=(BOLT_COMMON.diam_thread + 1)/2,
+            height=h*2
+        ).moved(0, 0, -h)
+        top = (cone1 + cone2.moved(0, 0, h/2)) - hole
+        return top + top.rotate((0,0,0),(1,0,0),180)
+
     def assembly_barrel(self) -> Cq.Assembly:
         """
         The assembly with gun barrels