Purpose - The purpose of the paper is to accomplish the analysis of a transmission shaft belonging to a longitudinal gearbox in order to reduce the axial clearances of the parts assembled on the shaft. The paper demonstrates also that the study of assembly conditions allows simplifying the analysis and the evaluation of different dimensioning schemes. Method - A previous functional approach to optimal dimensioning is used but it is associated to the analysis of relationships between the parts assembled on the shaft, the corresponding functional surfaces and the related dimensioning schemes. Then, a statistical analysis of tolerance chain is accomplished by using different IT grades that characterize dimensional tolerances. Result - The optimal functional dimensioning scheme of an automotive transmission shaft is accomplished. The scheme is able to guarantee the minimum axial clearances of parts assembled on the shaft. Discussion & Conclusion - The paper deals with the application of a functional approach to the optimal dimensioning of an automotive transmission shaft. The automotive transmission set is characterized by different working conditions, geometrical constraints and design parameters. Therefore, a preliminary decomposition of the assembly in several subsystems or groups is necessary to clearly analyse the longitudinal gearbox. Then, the study of assembling conditions and related functional surfaces allow simplifying the evaluation of different dimensioning schemes. In fact, the functional approach, aimed to optimal dimensioning, uses a worst-case and statistical analyses to directly check the axial clearances of the wheels assembled on the shaft. Therefore, the effects of dimensioning are directly evaluated in terms of performances of the transmission. Therefore, the different dimensioning schemes are evaluated through the functional approach, as the optimal scheme is able to guarantee the whole set of functional requirements of the shaft.
Optimal dimensioning of the transmission shaft of a longitudinal gearbox / Gerbino, S.; Lanzotti, Antonio; Patalano, Stanislao; Rufrano, Vito; Vitolo, Ferdinando. - (2013), pp. 1-7. (Intervento presentato al convegno International Conference on Graphic Engineering tenutosi a Madrid, Spain nel June, 19th – 21st).
Optimal dimensioning of the transmission shaft of a longitudinal gearbox
LANZOTTI, ANTONIO;PATALANO, STANISLAO;RUFRANO, VITO;VITOLO, FERDINANDO
2013
Abstract
Purpose - The purpose of the paper is to accomplish the analysis of a transmission shaft belonging to a longitudinal gearbox in order to reduce the axial clearances of the parts assembled on the shaft. The paper demonstrates also that the study of assembly conditions allows simplifying the analysis and the evaluation of different dimensioning schemes. Method - A previous functional approach to optimal dimensioning is used but it is associated to the analysis of relationships between the parts assembled on the shaft, the corresponding functional surfaces and the related dimensioning schemes. Then, a statistical analysis of tolerance chain is accomplished by using different IT grades that characterize dimensional tolerances. Result - The optimal functional dimensioning scheme of an automotive transmission shaft is accomplished. The scheme is able to guarantee the minimum axial clearances of parts assembled on the shaft. Discussion & Conclusion - The paper deals with the application of a functional approach to the optimal dimensioning of an automotive transmission shaft. The automotive transmission set is characterized by different working conditions, geometrical constraints and design parameters. Therefore, a preliminary decomposition of the assembly in several subsystems or groups is necessary to clearly analyse the longitudinal gearbox. Then, the study of assembling conditions and related functional surfaces allow simplifying the evaluation of different dimensioning schemes. In fact, the functional approach, aimed to optimal dimensioning, uses a worst-case and statistical analyses to directly check the axial clearances of the wheels assembled on the shaft. Therefore, the effects of dimensioning are directly evaluated in terms of performances of the transmission. Therefore, the different dimensioning schemes are evaluated through the functional approach, as the optimal scheme is able to guarantee the whole set of functional requirements of the shaft.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
