蝸輪蝸桿的特點

1，傳(chuan)(chuan)(chuan)動(dong)(dong)(dong)比大(da)(da)，結(jie)構緊(jin)湊。蝸(gua)(gua)桿頭數(shu)用(yong)Z1表示(shi)（一般Z1=1~4），蝸(gua)(gua)輪齒數(shu)用(yong)Z2表示(shi)。從(cong)傳(chuan)(chuan)(chuan)動(dong)(dong)(dong)比公(gong)式I=Z2/Z1可以(yi)看出，當(dang)Z1=1，即(ji)蝸(gua)(gua)桿為單頭，蝸(gua)(gua)桿須(xu)轉(zhuan)(zhuan)Z2轉(zhuan)(zhuan)蝸(gua)(gua)輪才轉(zhuan)(zhuan)一轉(zhuan)(zhuan)，因(yin)而可得到很大(da)(da)傳(chuan)(chuan)(chuan)動(dong)(dong)(dong)比，一般在動(dong)(dong)(dong)力(li)傳(chuan)(chuan)(chuan)動(dong)(dong)(dong)中，取傳(chuan)(chuan)(chuan)動(dong)(dong)(dong)比I=10-80；在分度機(ji)構中，I可達1000。這樣大(da)(da)的傳(chuan)(chuan)(chuan)動(dong)(dong)(dong)比如用(yong)齒輪傳(chuan)(chuan)(chuan)動(dong)(dong)(dong)，則需(xu)要(yao)采取多(duo)級(ji)傳(chuan)(chuan)(chuan)動(dong)(dong)(dong)才行，所以(yi)蝸(gua)(gua)桿傳(chuan)(chuan)(chuan)動(dong)(dong)(dong)結(jie)構緊(jin)湊，體積小、重量輕。

2，傳動(dong)平穩，無噪音。因為蝸(gua)桿齒(chi)是(shi)(shi)連(lian)續(xu)不(bu)間斷的(de)螺(luo)旋齒(chi)，它與蝸(gua)輪齒(chi)嚙合時是(shi)(shi)連(lian)續(xu)不(bu)斷的(de)，蝸(gua)桿齒(chi)沒有進入和(he)退(tui)出嚙合的(de)過(guo)程，因此工作平穩，沖擊、震動(dong)、噪音小。

3，蝸桿(gan)傳(chuan)動(dong)具(ju)有自鎖(suo)性。蝸桿(gan)的螺(luo)旋升角很小時(shi)，蝸桿(gan)只能(neng)帶動(dong)蝸輪(lun)傳(chuan)動(dong)，而蝸輪(lun)不(bu)能(neng)帶動(dong)蝸桿(gan)轉動(dong)。  

4，蝸桿的軸向力較(jiao)大(da)。

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