Tuƙi Knuckle, wanda kuma aka sani da "ram Angle", yana ɗaya daga cikin mahimman sassa na gadar tuƙi na mota, wanda zai iya sa motar ta yi gudu a tsaye da kuma canja hanyar tafiya cikin hankali. Ayyukan ƙwanƙwaran sitiyari shine don canjawa da ɗaukar nauyin gaban motar, goyan baya da tuƙi na gaba don juyawa a kusa da sarki kuma ya sa motar ta juya. A cikin yanayin tuki na motar, yana ɗaukar nauyin tasiri mai canzawa, saboda haka, ana buƙatar samun ƙarfi mai ƙarfi, ƙwanƙolin tuƙi ta hanyar bushing uku da kusoshi biyu kuma an haɗa jikin, kuma ta hanyar flange na rami mai hawa birki kuma tsarin birki. Lokacin da abin hawa ke tafiya cikin sauri mai girma, girgizar da aka watsa ta saman hanya zuwa ƙwanƙarar tuƙi ta cikin tayoyin shine babban abin da za a yi la'akari da shi a cikin bincikenmu. A cikin ƙididdigewa, ana amfani da samfurin abin hawa na yanzu don yin amfani da hanzarin gravitational 4G ga abin hawa, kuma ana ƙididdige ƙarfin tallafi na wuraren tsakiya guda uku na bushing na ƙwanƙwan sitiya da wuraren tsakiyar ramukan hawa biyu na bolt kamar yadda ake amfani da su. kaya, da kuma 'yancin duk nodes a kan ƙarshen fuskar flange da ke haɗa tsarin birki yana ƙuntata.