All results indicated that the higher trapped oil pressure,the more fluctuation of torque and higher value of max amplitude,but the min amplitude of torque was generally unchanged; the quality of meshing torque with the same teeth number of the gears was better than dissimilar teeth number.

Study of determining method of number of gear teeth in shifting system of machine tools;

The number of teeth of the change gear can be obtained as long as the diameter of the workpiece,the helical angle and it's upper deviation and lower deviation are fed into the com- puter.

It is concluded that the number of teeth of the pinion effects little on the fatigue strength of the surface of gear teeth designed,but greatly on that of the root through analysis of formula of gear fatigue strength Using the iterative method,causing Z 1Limt ≈Z 1,it will satisfy the requirement of equivalent fatigue strength of surface and root of gears.

The relationships between the fluctuation rate of the output torque of the involute gearing and both the sliding friction coefficient between teeth and tooth numbers;

To design the driving of cylinder gear,the first thing should do is to confirm the parametres,such as modulus,tooth number,central distance etc.

The P/M gear wheel with special shape is an important structure part in transmission mechanism.

Then compare with the way unloading groove slot, sum up the advantage and the technique important point of the wheel gear pump of different width of teeth, and give the measurement of bush.