Braider
Mechanism
The horn gear
braider is a mechanical mechanism that’s used to braid 3 or more strands of
material into a braided material, including rope and power cords. It uses carriers to secure roles of a
material, spur gears and horn gears that push the carriers, and a track to
guide the carrier’s movement.
Carrier
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Spur Gear and Horn Gear Combo
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Track
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Horn Gear Radial Offset
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·
The
meshing horn hears had to align so that the notches could align when the spur
gear teeth were in contact
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Gear
Parameterization
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Terminology
o Pitch Circle: The theoretical circle with which all
gear calculations are performed
§ Mating gears are tangential along the pitch circle
o
Pitch
Diameter, d: Diameter
of the pitch circle
o
Gear: Larger mating entity
o
Pinion: Smaller mating entity
o Diametral Pitch, P:
§ Ratio of the number of teeth to the pitch
diameter
§
§ Used primarily in the US
o Module, m:
§ Ratio of the pitch diameter to the
number of teeth
§
§ Also known as the index of the tooth in
SI
o Circular Pitch, c:
§ Distance between the same point on
adjacent gear teeth along the pitch circle
§
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o Addendum:
§ Radial distance between the gear’s top
land and the pitch circle
§ See Addendum Circle
o Dedendum:
§ Radial distance between the gear’s
bottom land and the pitch circle
§ See Dedendum Circle
o Depth, h:
§
o
Clearance
Circle: Theoretical
circle that’s tangent to a mating gear’s addendum circle
o Clearance, c: Amount by which a gear’s dedendum
exceeds a mating gear’s addendum
o Backlash: Amount by which the width of a tooth
space exceeds the thickness of the engaging tooth, measured along the pitch
circles
Helpful
Links