| Precision transmission device is one kind of the key fundamental components, which are extensively applied to many industry fields including robot industry, machine industry, instrument industry etc. With the development of Information Technology and space navigation technology, especially the micro-miniaturization, speediness and automation of satellite communication, scouting the flying project, remote sensing and measuring and astronomic observation antenna system, more hard requirements are demanded on precision transmission. Therefore, it deserves great significance to research new type of precision transmission and study the new precision transmission theory.This Project originates from The National High-technology Development and Research named 'The Research and Application on New Spatial-Cycloid-Ball Gearing', (No. 2001AA423190). According to the characteristics of spatial-cycloid-ball gearing, meshing transmission theory is studied and related numerical simulation is carried out. Major contents are as follows:1. As both the meshing point and ball's center are on the given cylinder, a general method for developing the cam's profile is studied. It is proved that the profile of Positive and Negative transmission is unique if the face gear, the difference between face tooth number and ball number and the diameter of ball are the same. The concrete expression of meshing cam on given spatial cycloid profile, and the characteristics of the profiles are discussed.2. The splitting method, enclosed planetary transmission sketch method and structure sketch method are used to deduce the transmission ratio formulas on several structures of the single-stage and double-stage spatial-cycloid-ball gearing respectively. Further more, the simplified calculating formulas on one-tooth-difference and two-tooth-difference spatial-cycloid-ball gearing are given.3. The size and direction of enclosed power current are analyzed for enclosed transmission structure. The method to eliminate enclosed power current is presented. Optimizing structural design is carried out.4. According to forces acted on cam, the self-lock character is analyzed. Examples are given to illustrate the self-lock character with different gear parameters. The results of analysis are presented.5. When it is one-tooth-minus, by analyzing the cam's profile, the formula to calculate kinematics balance is derived. The method of kinematics balance is put forward.6. With Microsoft VC++ 6.0 programming language, the software about numerical simulation on spatial-cycloid-ball gearing is developed.7. Based on the theoretic research, the design and manufacture of model machines are accomplished. |
PDF Full Text Request