Helical iav yog ib hom cylindrical iav nrog cov hniav helicoid. These gears are used to transmit power between parallel or non parallel shafts, providing smooth and efficient operation in various mechanical systems. Cov hniav helical yog angled raws lub iav lub ntsej muag hauv cov duab helix, uas tso cai rau cov hniav maj mam sib koom ua ke, ua rau kev ua haujlwm smoother thiab ntsiag to piv rau spur zog.
Helical gears muaj ntau yam zoo, nrog rau kev muaj peev xwm nqa tau ntau dua vim muaj kev sib cuag ntawm cov hniav ntau dua, kev ua haujlwm zoo dua nrog txo kev co thiab suab nrov, thiab muaj peev xwm xa cov lus tsa suab ntawm cov shafts tsis sib xws. Cov iav no feem ntau siv hauv kev xa tsheb, kev siv tshuab, thiab lwm yam kev siv uas qhov kev sib kis tau zoo thiab txhim khu kev qha yog qhov tseem ceeb.