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• W2553981908 abstract "The great concern about environment issues has stimulated the development of new mechanical drives concepts in machine and automotive systems, in search of better performance, functionality and efficiency. However, the identification of the applicability of a new concept involves the analysis and tests over physical models and prototypes. This work presents the concept of a new mechanical drive system, composed of bevel and face gears of involute profile teeth, with multi-step angular velocities ratios, for industrial and automotive purposes. There is an especial interest in the use of face gears in mechanical drives because of recent innovations in manufacture and computerized design processes, witch allowed to obtain high quality parts, with high mechanical strength and considerably lower costs as compared with bevel gears. To proceed with the synthesis and analysis process over this new mechanical drive concept, it was necessary to implement two mathematical models, converted into algorithms: i) kinematics of gear meshing, with the final purpose of obtain the gear tooth profile and an accurate solid model in a CAD software (it is important to emphasize that the tooth profile of a face gear, represented by the envelope generated by a succession of involute curves, does not presents the involute profile) and ii) teeth dimensioning, based on standards and in solid mechanics tools, to obtain the gears magnitude. This paper presents in details the first mathematical model, based on linear algebra and differential geometry. The coordinate transformation matrices are shown, as well as the meshing equation for the face and bevel bands of the proposed transmission. The implemented algorithm allowed to build an accurate solid model, in a CAD software, of the bevel and face gears adopted in the system. The mathematical model also permits to define in which cases is interesting to adopt a work band (corresponding to one of the angular velocities ratio) composed by conical teeth (contrary to face gear teeth). The solid models of the gears were used to CNC code generation and manufacturing process on a high speed machining center. In succession, all the subsystems of a prototype were designed and constructed. This prototype was built to validate the functional attribute of the drive system. The concept validation was based on the verification of the movements necessary to shift the ratio of velocities simultaneously to the gears rotation, without teeth collision. Some aspects related to the system operation are discussed, and positive points and constraints observed are explained." @default.
• W2553981908 created "2016-11-30" @default.
• W2553981908 creator A5032421108 @default.
• W2553981908 date "2009-01-01" @default.
• W2553981908 modified "2023-09-27" @default.
• W2553981908 title "CONCEPT AND KINEMATICS MODEL OF A MECHANICAL DRIVE SYSTEM BASED ON FACE AND BEVEL GEARS" @default.
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