FCGear CrownGear

Description
The crown wheel resembles a ring-shaped curved rack. The pressure angle decreases continuously from the outer to the inner diameter. Thus, the variable peripheral speed at the crown wheel is compensated against the constant peripheral speed of the pinion. The pointed outer teeth and the steep tooth flanks on the inner diameter limit the usable tooth width. Crown gears achieve similar efficiencies as spur gears. One crown gear can drive several pinions.

Known field of application of crown gears:


 * Rear axle drives for cars and motorcycles
 * Swivel mechanism for operating tables
 * Angular milling heads
 * Powered tool systems with multiple pinions and a crown gear


 * [[File:Crown-Gear example.png]]

Usage

 * 1) Switch to the [[Image:FCGear_workbench_icon.svg|22px]] FCGear Workbench.
 * 2) Invoke the command several way:
 * 3) * Press the FCGear_CrownGear.svg Create a Crown gear button in the tool bar.
 * 4) * Using the.
 * 5) Change the gear parameter to the required conditions (see  below).

Data

 * : Placement is the location and orientation of an object in space.
 * : User name of the object in the Tree view.


 * : Default is . Change to and the construction component disappears.  belongs to.
 * : Number of profiles used for loft.


 * : Value for the tooth width.
 * : Module is the ratio of the reference diameter of the gear divided by the number of teeth (see also the information in ).
 * : Number of teeth of the gear (pinion). See also the information in.
 * : Number of teeth
 * : Height from the tip of tooth to the lower side of the crown wheel.


 * : Default is 20 (see also the information in ).

View
The parameter descriptions of the tab will be found in Property editor, further below at.

Limitations
No limitations are known.

Crown and spur gear set overview

 * [[File:Crown-spur-gear-set example.png]]


 * (1) Spur gear
 * (2) Crown gear
 * (3) Tooth width
 * (4) Inner diameter
 * (5) Outer diameter

Useful formulas

 * Inner diameter (4)


 * Outer diameter (5)