Crankshaft yana ɗaya daga cikin mahimman sassa a cikin injin konewa na ciki, shine kashin bayan injin, shine babban ɓangaren don ɗaukar nauyin tasirin da watsa iko.

The crankshaft aka yafi hada da gaban karshen crankshaft, babban shaft wuyansa, a haɗa sanda jarida, da crank, da balance block, da baya karshen crankshaft, da dai sauransu Babban aikinsa shi ne ya maida gas matsa lamba daukar kwayar cutar ta hanyar. piston haɗa sanda kungiyar a cikin waje fitarwa karfin juyi, kuma zai iya fitar da bawul inji na ciki konewa engine da daban-daban na'urorin haɗi. Yanayin aiki da damuwa na crankshaft yana da matukar rikitarwa, kuma ana yin shi ne da tasirin sakamako na canje-canje na lokaci-lokaci a cikin matsa lamba na gas, ƙarfin centrifugal da ƙarfin inertial yayin aiki. Sabili da haka, a cikin sarrafawa da masana'anta, daidaiton girman, daidaiton matsayi da ƙarancin saman kowane ɓangaren crankshaft suna da buƙatu mafi girma.

A crankshaft ne gaba ɗaya jefa daga matsakaici carbon karfe, matsakaici carbon gami karfe ko ductile baƙin ƙarfe