A helical planetary gearset is a type of planetary gear system where the teeth of the sun gear, planet gears, and/or ring gear are helical rather than straight. This design allows for smoother, quieter operation, greater load-carrying capacity, and more flexible shaft alignment.

// Helical Planetary Gearset
// A helical planetary gearset is a type of planetary gear system where the teeth of the sun gear, planet gears, and/or ring gear are helical rather than straight. This design allows for smoother, quieter operation, greater load-carrying capacity, and more flexible shaft alignment.
// Categories: Mechanical Components; Automotive & Transportation

@settings(defaultLengthUnit = mm, kclVersion = 2.0, experimentalFeatures = allow)

// Create the outer ring gear for the planetary gearset
gear::ring(
  nTeeth = 40,
  module = 1.5,
  pressureAngle = 14deg,
  helixAngle = -25deg,
  gearHeight = 5,
)

// Create a central sun gear using a small helical gear
gear::helical(
  nTeeth = 12,
  module = 1.5,
  pressureAngle = 14deg,
  helixAngle = 25deg,
  gearHeight = 5,
)
  |> rotate(yaw = -4)

// Create the first helical planet gear
numPlanetGears = 4
planetGear = gear::helical(
  nTeeth = 12,
  module = 1.5,
  pressureAngle = 14deg,
  helixAngle = -25deg,
  gearHeight = 5,
)

// Move the first planet gear into place, then copy it around the sun.
translate(planetGear, y = (12 + 12) / 2 * 1.5 + 2)
  |> patternCircular3d(
       instances = numPlanetGears,
       axis = Z,
       center = [0, 0, 0],
       arcDegrees = 360deg,
       rotateDuplicates = false,
     )


Helical Planetary Gearset

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