20.500.12556/RUL-148963 Zasnova in analiza brezstopenjskega zobniškega gonila Design and analysis of stepless geared drive Poraba energije v transmisijah je vedno bolj pomemben vidik pri razvoju novih gonil. Stopenjski menjalniki v primeru vozil ne morejo zagotavljati optimalnega izkoristka vira pogona. Pri tem so boljši brezstopenjski menjalniki. Ti so največkrat v obliki jermenskih ali tornih CVT-jev, ki imajo zaradi prenosa momenta prek trenja, nizke izkoristke. Obstaja možnost e-CVT-ja kjer s kombinacijo dveh pogonov brezstopenjsko reguliramo odgon, vendar ta način zahteva uporabo elektromotorja. Zgolj mehansko brezstopenjsko spreminjanje prestave s čim večjo učinkovitostjo zahteva zobniške prenose. Iz vprašanja, kako doseči brezstopenjsko spreminjanje prestavnega razmerja z uporabo zobnikov, smo zasnovali in analizirali brezstopenjsko zobniško gonilo. Preučili smo teoretično ozadje ročičnega mehanizma in mehanskega usmernika ter ju dimenzionirali. Izračunali smo njuno kinematiko in mehanske obremenitve. Določili smo razpon prestavnega razmerja. Ocenili smo učinkovitost celotnega gonila. Naredili smo sestavno risbo in izpopolnili detajle z izdelavo 3D modela. Energy consumption in transmissions is becoming an increasingly important aspect in the development of new propulsion systems. Traditional gearboxes, in the case of vehicles, cannot ensure optimal utilization of the power source. Continuously Variable Transmissions (CVTs) are more efficient in this regard. These are often in the form of belt or toroidal CVTs, which have lower efficiencies due to torque transfer through friction. An option is the e-CVT, where a combination of two drivetrains regulates propulsion continuously, but this method requires the use of an electric motor. Achieving seamless gear ratio changes using only mechanical means with maximum efficiency necessitates the use of gear transmissions. To address the question of achieving continuous gear ratio changes using gear mechanisms, we designed and analyzed a stepless gear drive. We examined the theoretical background of the crank mechanism and the mechanical rectifier, and dimensioned them. We calculated their kinematics and mechanical loads. We determined the range of gear ratios. We assessed the overall efficiency of the entire drive system. We created an assembly drawing and refined details by creating a 3D model. brezstopenjsko zobniško gonilo snovanje gonila ročični mehanizem mehanski usmernik numerični izračuni simulacije učinkovitost stepless geared drive drive formation crank mechanism mechanical rectifier numerical calculations simulations efficiency true false false [G. Gaberšček] Slovenski jezik Angleški jezik Magistrsko delo/naloga 2023-09-02 08:30:59 2023-09-02 08:31:03 2023-10-12 12:26:43 0000-00-00 00:00:00 2023 0 Ljubljana 0 XIX, 72 str. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 621.83:621.837.7:519.6(043.2) 255619 168116483 29501.pdf 29501.pdf 1 96FA114C45F9D045D3BBA69A379387A5 77e65261421e9ee64ef7a852fa02f50a357de965b54270907d14830b0075fb43 49589cc3-495a-11ee-af86-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=173341 Fakulteta za strojništvo 0 0 0