Papers by Keyword: Gear Strength

Abstract: As key factor of numerical simulation for gear strength, namely determination of effective loads between meshing teeth profiles, their numerical calculation principles of static and dynamic finite element methods are analyzed according to the loads on gear teeth. The static analysis of gear strength can be classified to effective statics and static contact analysis, and the numerical simulation method for face distribution as the rule of Hertz contact is advanced. The differences between static and dynamic contact and their influences in results are researched. Compared with the empirical formulas, the analytical results about bearing capacity of gear drive under different effective loads show: (1) As the sequence of concentrated force, linear distribution force, face distribution force as the rule of Hertz contact, static contact analysis, the accuracy and reliability of calculating results under different effective loads are improved, especially the results from face distribution and static contact being very close. (2) Dynamic contact analysis can be used to simulated the effect well. The above studies could be referenced to calculation in bearing capacity of gear drive.

Abstract: A new silk-hat type of harmonic drive device (HDD) with arc flexspline (FS) structure is developed. Loaded gear contact analysis (LGCA) and stress calculations are made for it with three-dimensional, finite element method (3D-FEM). Basic performances and strengths tests are also made. It is found that the new structure almost has the same performances and strength as the old one.

Abstract: This paper is a study on loaded gear contact analyses (LGCA) and strength calculations of trochoidal gear reducers (TGR). A two-dimensional finite element method (2D-FEM) is used to conduct LGCA and strength calculations of the TGR. Effects of machining errors (ME) and tooth modifications (TM) on tooth load and pin load distributions of the TGR are also discussed.