A model for nonfrictional power loss in derailleur-type, bicycle chain drives is developed to identify factors that influence transmission efficiency. Existing treatments of chain drive efficiency consider factional losses but these do not explain the measured tension dependence of power losses and efficiencies for derailleur-type systems. Based on a nonlinear, spring-mass, mechanical transmission line, the model developed in this work shows that losses can be related to harmonic generation and dispersion in the chain. The nonlinear response leading to harmonic generation results from elastic contact at pinbushing interfaces while dispersion is related to the periodic nature of the chain construction. Using this approach, the tension-dependence of power loss and efficiency are modeled and the influences of various chain-related characteristics on efficiency are assessed. If Hertzian contact descriptions are used, then the dependence of loss and efficiency on pin-bushing clearance, contact length and modulus can be estimated. Modeled results agree with experiment and show that power loss decreases with increasing chain tension and that efficiency varies nearly linearly with the reciprocal of the chain tension under operational conditions that are typical for bicycle chain drives. Significant increases to the power transmission efficiency of bicycle chain drives in derailleur-based systems could be achieved by altering the geometries and materials of current chain components.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Effects of the nonlinear elastic behavior of bicycle chain on transmission efficiency


    Weitere Titelangaben:

    Auswirkungen des nichtlinearen elastischen Verhaltens einer Fahrradkette auf die Übertragungseffizienz


    Beteiligte:

    Erschienen in:

    Erscheinungsdatum :

    2013


    Format / Umfang :

    8 Seiten, 7 Bilder, 26 Quellen




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch




    Bicycle chain efficiency

    Kidd, M.D. / Loch, N.E. / Reuben, R.L. | Tema Archiv | 1996


    TRANSMISSION FOR NON-CHAIN BICYCLE

    MA JI HYUN | Europäisches Patentamt | 2015

    Freier Zugriff

    BICYCLE CHAIN AND TRANSMISSION SYSTEM COMPRISING THE CHAIN

    MICRO CIVIERO / FELTRIN MAURI / FILIPPO BISARELLO | Europäisches Patentamt | 2017

    Freier Zugriff

    Effects of Frictional Loss on Bicycle Chain Drive Efficiency

    Spicer, James B. | Online Contents | 2001


    CHAIN COMPONENT OF BICYCLE CHAIN, AND BICYCLE CHAIN

    IWAI TORU / TANIGUCHI MASANORI | Europäisches Patentamt | 2021

    Freier Zugriff