FCGear CrownGear/de

Beschreibung
Das Kronenerad ähnelt einer ringförmig gebogenen Zahnstange. Der Eingriffswinkel verringert sich kontinuierlich vom äußeren bis zum inneren Durchmesser. Damit wird die variable Umfangsgeschwindigkeit am Kronenrad zur konstanten Umfangsgeschwindigkeit des Ritzels ausgeglichen. Die spitzen Zahnaußenseiten und die steilen Zahnflanken am Innendurchmesser begrenzen die nutzbare Zahnbreite. Kronenräder sind ähnlich leistungsfähig wie Stirnräder. Ein Kronenrad kann mehrere Ritzel antreiben.

Bekannte Anwendungsgebiete von Kronenrädern:


 * 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



Anwendung

 * 1) Zum Arbeitsbereich [[Image:FCGear_workbench_icon.svg|16px]] FCGear wechseln.
 * 2) Es gibt mehrere Möglichkeiten den Befehl aufzurufen:
 * 3) * Die Schaltfläche drücken.
 * 4) * Den Menüeintrag auswählen.
 * 5) Die Einstellungen den geforderten Randbedingungen entsprechend ändern (siehe ).

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

Daten

 * : 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 ).



Hinweise

 * The property is set to  by default and when the gear is created you'll find this message in the report view:
 * Gear module: Crown gear created, preview_mode = true for improved performance. Set preview_mode property to false when ready to cut teeth.
 * : Using ISO (International Organization for Standardization) guidelines, Module size is designated as the unit representing gear tooth-sizes. Module (m): m = 1 (p = 3.1416), m = 2 (p = 6.2832), m = 4 (p = 12.566). If you multiply Module by Pi, you can obtain Pitch (p). Pitch is the distance between corresponding points on adjacent teeth.
 * : Several pinions with the same number of teeth only can be used on one crown wheel.
 * : Only change the parameter, if sufficient knowledge of the gear geometry is available.
 * The geometry of the crown gear is primarily determined by the spur pinion geometry.
 * Create spur gear with Involute gear. The number of teeth must be identical to the parameter of the crown gear.
 * Adjustments for optimal running characteristics can be made with the parameters of involute gear.

Crown and spur gear set overview



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

Hilfreiche Formeln

 * Inner diameter (4)


 * Outer diameter (5)