FCGear TimingGear/ru

FCGear TimingGear
Menu location
Gear → Timing Gear
Workbenches
FCGear
Default shortcut
None
Introduced in version
v0.16
See also
None

Описание

Назначение ременной передачи газораспределительного механизма (сокращенно ГРМ) состоит в том, чтобы позволить распределительному и коленчатому валу вращать цепь ГРМ. Коленчатый вал вращается, перемещая поршни вверх и вниз внутри цилиндров. Распределительный вал поворачивается, позволяя впускным и выпускным клапанам на цилиндрах открываться и закрываться. Эти компоненты важны для правильного газораспределения внутри двигателя внутреннего сгорания.

Timing gears are connected to a timing belt or timing chain.

Above: Timing gear

Usage

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

Properties

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

Data

base

• Данныеheight (Length): Default is 5 mm. Value of the gear width.
• Данныеteeth (Integer): Default is 15. Number of teeth.
• Данныеtype (Enumeration): Default is gt2. Type of timing gear – profile pitch for timing belts (see Notes).

computed

• Данныеh (Length): (read-only) Radial height of teeth.
• Данныеoffset (Length): (read-only) X-Offset of second arc mid-point.
• Данныеpitch (Length): (read-only) Pitch of gear.
• Данныеr0 (Length): (read-only) Radius of first arc.
• Данныеr1 (Length): (read-only) Radius of second arc.
• Данныеrs (Length): (read-only) Radius of third arc.
• Данныеu (Length): (read-only) Radial difference between pitch … diameter and head of gear.

version

• Данныеversion (String):

Notes

• type: The pitch of the timing belts (distance from tooth centre to tooth centre of consecutive teeth) is specified in types. GT2 has a pitch of 2 mm, GT3 of 3 mm, GT5 of 5 mm etc..

Useful formulas

• addendum diameter = pitch diameter + 2 * module
• belt length = 2 * axle base + belt tooth pitch : 2 * (teeth 1 + 2) + belt tooth pitch² : 4 * pi² * axle base * (teeth 1 - 2)²
• axle base = belt length : 4 - belt tooth pitch : 8 * (teeth 1+2) + ¼ * sqrt [belt length - ½ * belt tooth pitch * (teeth 1+2)² - 2 * belt tooth pitch² * (teeth 1+2)² : pi²]