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Geometry

 

Formulas given in this chapter are only for reference and description of the adopted algorithms. Basic kinematic scheme of the planetary transmission is shown in figure gif.

  figure64
Figure: Kinematic scheme of the planetary transmission

Numbered components in figure gif are:

  1. Sun gear - (tex2html_wrap_inline655)
  2. Planet gear - (tex2html_wrap_inline657)
  3. Ring Gear - (tex2html_wrap_inline659)
  4. Carrier - C

There are several transmission ratios for different mounting and variants which is shown in table gif where
equation77

  table81
Table: Transmission ratio as function of drive combination

The most common variant is Sun - Ring - Carrier. Other connections are also used. Number of teeth is tested with the following equation
 equation99
where tex2html_wrap_inline673 must be whole number.





Leon Kos
Tue Dec 2 10:35:04 CET 1997