上海充通大学 Types of Gear trains Compound Train Design:Exact GR Factor desired ratio: 180=22x32x5 XXZZZZZZZZ7Z Want to keep each ratio ii的 品 NXXXXXXXZZZ77ZZ about the same (i.e. 6x6x5) ©14x6=84 114t h14t8 ©14x5=70 ©Total ratio, We could have used: 70 84 =180 180=2x90=2x2x45=2x2x5x9=4x5x9 14 or 4.5x6x(20/3)etc. 上海充通大粤 Types of Gear trains Reverted Compound Train Input and output shafts are aligned For reverted gear trains: R2+R3=R4+R5 Commercial three stage reverted compound train D2+D3=D4+D5 N2+N3=N4+N5 ©Gear ratio is N2N4 @Din N3 Ns8 Compound Train Design: Exact GR Factor desired ratio: 180=22x32x5 Want to keep each ratio about the same (i.e. 6x6x5) 14x6=84 14x5=70 Total ratio 180 14 84 14 70 2              We could have used: 180=2x90=2x2x45=2x2x5x9=4x5x9 or 4.5x6x(20/3) etc. Types of Gear trains Reverted Compound Train Input and output shafts are aligned For reverted gear trains: R2+R3=R4+R5 D2+D3=D4+D5 N2+N3=N4+N5 Gear ratio is Commercial three stage reverted compound train 5 4 3 2 N N N N ω ω in out  Types of Gear trains