In order to analyze force easily,we simplify the model of FA cyloid,taking no account of friction,supposing that there is the maximum of distortion in the largest arm of force,but in fact,friction must be exist and there is not always needle tooth in the largest arm of force.

In the optimization design system of the arm system,the heredity multipurpose optimal model was set up and the maximal horizontal displacement of the load and the minimum arm of force were adopt as objective function.

However, so far a fatal weakness still exsists in the crankshaft-connecting rod mechanism that is what the arm of force on the crank is very short during the period of combustion prssure reaching maximum points in cylinder, as a result, the torque on the crankshaft is restricted.

In the optimization design system of the arm system,the heredity multipurpose optimal model was set up and the maximal horizontal displacement of the load and the minimum arm of force were adopt as objective function.

The tooth form factor is a factor to consider the geometric profile of gear teeth and the bending strength of root of teeth during the machine design.The calculation of this factor referred to the dimension of the rack cutter,the angle of actig load and the arm of bending moment. In view of the pinion of epicyclic gear trains which takes radial and tangential displacement of cutter as well, we must consider those effects simultaneously.Accrding to National Standard, the form factors is calculated with computer...

The tooth form factor is a factor to consider the geometric profile of gear teeth and the bending strength of root of teeth during the machine design.The calculation of this factor referred to the dimension of the rack cutter,the angle of actig load and the arm of bending moment. In view of the pinion of epicyclic gear trains which takes radial and tangential displacement of cutter as well, we must consider those effects simultaneously.Accrding to National Standard, the form factors is calculated with computer in this paper.

In this paper, the essential properties andexisting problems of Archimedes spiral and logarithmicspiral regarded as the Profile of the zero-resetting camare approached. As a new profile curve, the identical armof force curve is advanced, its analytical equation is deduced,and the basic method for design is shown.

Researchers have done much fairly good jobs on the theoritical studies of crankshaft-connecting rod mechanism and made it nearly to reach a perfection level. Cranknkshaft-connecting rod mechanism is an essential part in a piston type internal combustion engine which shows distinct advantages in power performance, economics, operationai reliability and durability. Rezearchers have, also got big progresses in the elimination of reciprocating inertia and torsional inertia. However, so far a fatal weakness still...

Researchers have done much fairly good jobs on the theoritical studies of crankshaft-connecting rod mechanism and made it nearly to reach a perfection level. Cranknkshaft-connecting rod mechanism is an essential part in a piston type internal combustion engine which shows distinct advantages in power performance, economics, operationai reliability and durability. Rezearchers have, also got big progresses in the elimination of reciprocating inertia and torsional inertia. However, so far a fatal weakness still exsists in the crankshaft-connecting rod mechanism that is what the arm of force on the crank is very short during the period of combustion prssure reaching maximum points in cylinder, as a result, the torque on the crankshaft is restricted. Therefore, we put forward a theory of translation combustion and some tentative ideas such as developing a special mechanism and a connecting rod which can store energy in this paper. Here, we just cast a brick to attract jade for the purpose of being able to resolve the problem above mentioned We beieve that it would be an innovation to internal combustion engine provided the mechanical design and developing work sueceed.