isistimu sokuhlela ngokweqenqene
Isisitim kwegiya lelilayisha kanye neveliyo yilinqanu elikhulu lemechanical elwenza ukuguqula imotion yokuqina ukuya kwezindlela zokuhamba, kusebenza njengokwengeza kwemindawo eziyingceke kanye nezokusebenza kwemoto. Le mekanismi enkuluwa nezinto ezimbili eziphambene: igiya esekelwe yokuqina (pinion) eyayiqamba neveliyo elilunge lelilayisha (rack). Xa ipinion iyawenza ukuphambene, iyawenza ukuba irack ihambise ngendlela ethile, wenza ukuhamba okuphezulu kanye nekuphathwa ngokucophelela. Isakhiwo senkqubo yenziwa ngendlela ekhomba ukucophelela kakhulu kwezinkqubo zokubeka kanye nokuphatha imotion, lokhu kuyindlela engeza kwezokusebenza ezidinga ukuhamba olulunge ngokuphezulu. Izinkqubo zokusebenza zezigidi zase ngokudla kanye neveliyo ziyasebenzisa izinto ezintsha kanye nezindlela zokwenza, zihlinza ukuba zilinde kanye nezosebenza ngokugcinelwe kakhulu ngokushaywa kwezindlela zokusebenza. Ukuthambekwa kwenkqubo kuboniswe ngokusebenzisa kakhulu kwezinkqubo zokulawula, izinkqubo ezithuthakanye kanye nezinhlelo zokusebenza. Usizo lwesakhiwo sothambeko kanye nezindlela zokuthumela amandla okuphela kuyindlela engeza kwezokusebenza apho isithuba sikhulu kodwa ukuhamba olulunge ngokuphezulu kudingekile. Ukuthambekwa kwenkqubo kuhlelwa ngokushintshwa kwezobuchwephesha, kubandakanya ukulehliswa kwezinto zokugaya, izinkqubo zokulubricate kanye nezinhlelo zokubamba eziphela ukulungiswa kwezindlela zokugcina. Lezi zinto zizonke zihlinza ukusebenza ngokuphezulu kanye nokuba zilinde kakhulu, zenza ukuba isisitim kwegiya lelilayisha kanye neveliyo yilinqanu elikhulu lemechanical esemthethweni.