Thaum ntxov ntawm cov kabmob linear motion, ib kab ntawm cov pas ntoo tau muab tso rau hauv qab ib kab ntawm cov phaj skid. Cov kabmob linear motion niaj hnub siv tib lub hauv paus ntsiab lus ua haujlwm, tsuas yog tias qee zaum cov pob siv hloov cov menyuam. Cov kabmob rotary yooj yim tshaj plaws yog lub tes tsho kabmob, uas tsuas yog lub bushing sandwiched ntawm lub log thiab lub qag. Qhov kev tsim no tom qab ntawd tau hloov los ntawm cov kabmob dov, uas siv ntau lub cylindrical rollers los hloov lub bushing qub, thiab txhua lub ntsiab lus dov zoo li lub log sib cais.
Ib qho piv txwv thaum ntxov ntawm lub pob bearing tau pom ntawm lub nkoj Roman thaum ub uas tau tsim tsa xyoo 40 BC hauv Lake Naimi, Ltalis: lub pob bearing ntoo tau siv los txhawb lub rooj saum toj tig. Nws tau hais tias Leonardo da Vinci tau piav qhia txog lub pob bearing nyob ib puag ncig xyoo 1500. Ntawm ntau yam tsis paub tab ntawm lub pob bearings, ib qho tseem ceeb heev yog tias cov pob yuav sib tsoo, ua rau muaj kev sib txhuam ntxiv. Tab sis qhov no tuaj yeem tiv thaiv tau los ntawm kev muab cov pob rau hauv cov tawb me me. Hauv xyoo pua 17th, Galileo thawj zaug piav qhia txog lub pob bearing ntawm "cage ball". Thaum kawg ntawm xyoo pua 17th, British C. wallow tau tsim thiab tsim cov pob bearings, uas tau teeb tsa rau ntawm lub tsheb xa ntawv rau kev sim siv, thiab British P Worth tau txais daim ntawv pov thawj ntawm pob bearing. Thawj lub pob bearing dov nrog lub tawb tau tsim los ntawm tus kws saib xyuas John Harrison hauv xyoo 1760 los ua H3 timepiece. Thaum kawg ntawm xyoo pua 18th, HR hertz ntawm lub teb chaws Yelemees tau luam tawm ib daim ntawv txog kev sib cuag ntawm cov pob bearings. Raws li Hertz cov kev ua tiav, Lub teb chaws Yelemees r. Stribeck thiab Sweden tus Palmgren thiab lwm tus tau ua ntau qhov kev sim, uas tau pab txhawb rau kev tsim cov qauv tsim thiab kev xam lub neej qaug zog ntawm cov kabmob dov. Tom qab ntawd, NP Petrov ntawm Russia tau siv Newton txoj cai ntawm viscosity los xam qhov kev sib txhuam ntawm cov kabmob. Daim ntawv pov thawj thawj zaug ntawm lub pob channel tau txais los ntawm Philip Vaughn ntawm camson hauv xyoo 1794.
Xyoo 1883, Friedrich Fisher tau tawm tswv yim txog kev siv cov tshuab tsim khoom tsim nyog los sib tsoo cov pob hlau nrog tib qhov loj me thiab qhov tseeb, uas tau tso lub hauv paus ntawm kev lag luam bearing. O Reynolds tau ua qhov kev tshuaj xyuas lej ntawm Thor qhov kev tshawb pom thiab tau txais Reynolds equation, uas tau tso lub hauv paus ntawm hydrodynamic lubrication theory.
Lub sijhawm tshaj tawm: Cuaj hlis-01-2022