FCGear Engrenage à développante interne

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FCGear InternalInvoluteGear

Menu location
Gear → Internal Involute Gear
Workbenches
FCGear
Default shortcut
None
Introduced in version
1.0
See also
FCGear InvoluteGear

Description

Internal involute gears from left to right: Spur gearing, helical gearing, double helical gearing

Usage

  1. Switch to the FCGear Workbench.
  2. There are several ways to invoke the command:
    • Press the Internal Involute Gear button in the toolbar.
    • Select the Gear → Internal Involute Gear option from the menu.
  3. Change the gear parameter to the required conditions (see Properties → Data below).

Properties

An FCGear InternalInvoluteGear object is derived from a Part Feature object and inherits all its properties. It also has the following additional properties:

Data

accuracy

  • Donnéesnumpoints (Integer): Default is 6. Change of the involute profile. Changing the value can lead to unexpected results.

base

  • Donnéesheight (Length): Default is 5,00 mm. Value of the gear width.
  • Donnéesmodule (Length): Default is 1,00 mm. Module is the ratio of the reference diameter of the gear divided by the number of teeth (see also the information in Notes).
  • Donnéesteeth (Integer): Default is 15. Number of teeth (see also the information in Notes).
  • Donnéesthickness (Length): Default is 5,00 mm. Thickness of the uncut outer part of the gear.

computed

  • Donnéesangular_backlash (Angle): (read-only)
  • Donnéesda (Length): (read-only) Inside diameter, measured at the addendum (the tip of the teeth).
  • Donnéesdf (Length): (read-only) Root diameter, measured at the foot of the teeth.
  • Donnéesdw (Length): (read-only) Working pitch diameter.
  • Donnéesoutside_diameter (Length): (read-only) Outside diameter.
  • Donnéestransverse_pitch (Length): (read-only) Pitch in the plane of rotation.

fillets

  • Donnéeshead_fillet (Float): Default is 0,00 mm.
  • Donnéesroot_fillet (Float): Default is 0,00 mm.

helical

  • Donnéesbeta (Angle): Default is 0,00°. With the helix angle β a helical gear is created – positive value → rotation direction right, negative value → rotation direction left (see also the information in Notes).
  • Donnéesdouble_helix (Bool): Default is false. true creates a double helix gear (see also the information in Notes).
  • Donnéesproperties_from_tool (Bool): Default is false. If helix angle β is given and properties_from-tool is true, gear parameters are internally recomputed for the rotated gear.

involute

  • Donnéespressure_angle (Angle): Default is 20,00°. (see also the information in Notes).
  • Donnéesshift (Float): Default is 0,00. Generates a positive and negative profile shift (see also the information in Notes).

precision

  • Donnéessimple (Bool): Default is false. true generates a simplified display (without teeth and only a cylinder in pitch diameter).

tolerance

  • Donnéesbacklash (Length): Default is 0,00 mm. Backlash, also called lash or play, is the distance between the teeths at a gear pair.
  • Donnéesclearance (Float): Default is 0,25. (see also the information in Notes).
  • Donnéeshead (Float): Default is -0,40 mm. This value is used to change the tooth height.
  • Donnéesreversed_backlash (Bool): true backlash decrease or false (default) backlash increase (see also the information in Notes).

version

  • Donnéesversion (String):

Notes

See FCGear InvoluteGear.

Useful formulas

See FCGear InvoluteGear.

Scripting