圈上泽文通大华 Conjugate Action(共轭) For a pair of gears to maintain a constant angular velocity ratio,the common normal of n both contacting surfaces must K Pitch circle pass through the fixed "pitch 节圆 point". Pitch circl The angular velocity ratio 节圆 between 2 meshing gears remains constant throughout the mesh 02 圈上泽夫道大学 Fundamental Law of Gearing Angular velocity ratio(my) Torque ratio(m)is mechanical advantage(m) VK2 n VK2K1 C K Pitch circle 节圆 Pitch circle 节圆 0 din y =±五=± Iout 02 d 1111 1 2 O1 O2 C2 1 2 C1 n n P vK1 vK2 v K K2K1 Pitch circle 节圆 Pitch circle 节圆  For a pair of gears to maintain a constant angular velocity ratio, the common normal of both contacting surfaces must pass through the fixed “pitch point”.  The angular velocity ratio between 2 meshing gears remains constant throughout the mesh Conjugate Action(共轭) 1 2 O1 O2 C2 1 2 C1 n n P vK1 vK2 v K K2K1 Pitch circle 节圆 Pitch circle 节圆 Fundamental Law of Gearing  Angular velocity ratio (mV)  Torque ratio (mT) is mechanical advantage (mA) in out in out out in in out T out in out in in out V d d r r ω ω T m d d r r ω ω m            T