2K-H型擺線針輪行星傳動性能理論的研究.pdf

1、華中科技大學博士學位論文2KH型擺線針輪行星傳動性能理論的研究姓名：蒙運紅申請學位級別：博士專業(yè)：機械設計及理論指導教師：吳昌林胡于進20071030華中科技大學博士學位論文華中科技大學博士學位論文IVAbstractTheonetoothdifference2KHcycloidneedleplaarytransmissionmechanismisusedextensivelyfcontinuousadjustmentoftheseat

2、backangleonvariousautomobiles.Themechanismprovidesboththeangleadjustingfunctiontheselflockingfunction.Italsofeaturesacompactstructureeaseofoperationasmalladjustingmomentahighprecisionofadjustmenttheadaptabilitytobeingmot

3、driven.Fthepurposeofseatbackangleadjustmentthetransmissionmechanismmusthavebothpropertiesofasmalladjustingmomentalargeselflockingmoment.Thetworequirementshoweveringeneralconflictwitheachotherabalancebetweenthedrivingadju

4、stingperfmancetheselflockingperfmancehastobecarefullyachieved.Thedissertationisdevotedtobuildanaccuratemathematicalmodelthatdescribesthedependenceofthepositivethenegativeoutputmomentsonthekinematicparametersofthetransmis

5、sionmechanism.Suchamodelprovidesatheeticalbasistodesignoptimizationindertomaximizetheadjustingperfmancewhilemaintainingselflockingperfmance.Anewdefinitionofthebacklashbetweengearteethisproposedfthefirsttime.Thebacklashis

6、definedastheminimumdistancebetweentheteethofapairofgearsinthedirectionoftheircommonnmal.Basedonthisdefinitionamethodispresentedfcalculatingthebacklashesthegeometricalanglesftheeticallymodifiedtoothprofilesftoothprofilesf

7、abricatedbyCNCmachines.Itisusedfcalculatingactualthenumberofteethatmeshing.Themethodistestedwithsimulationsofmeshingstatesisusedtoinvestigatetheeffectsoftoothprofilemodificationsmachiningstepsontheperfmancemeshing.Basedo

8、nthemechanicalanalysisofthe2KHcycloidneedleplaarytransmissionmechanismamodelfthemeshingstatewithbacklashisproposed.Themodelwhichtakesintoaccountofthefrictionbetweentoothprofilesthefrictionatbearingselasticdefmationofmesh