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蝸輪蝸桿特點
蝸輪蝸桿的特點
1,傳(chuan)動(dong)(dong)(dong)比(bi)(bi)(bi)大,結構(gou)緊(jin)湊。蝸(gua)桿(gan)頭數(shu)用(yong)Z1表(biao)示(shi)(一般Z1=1~4),蝸(gua)輪(lun)(lun)齒數(shu)用(yong)Z2表(biao)示(shi)。從傳(chuan)動(dong)(dong)(dong)比(bi)(bi)(bi)公式(shi)I=Z2/Z1可(ke)(ke)(ke)以看出(chu),當(dang)Z1=1,即蝸(gua)桿(gan)為單頭,蝸(gua)桿(gan)須轉(zhuan)Z2轉(zhuan)蝸(gua)輪(lun)(lun)才轉(zhuan)一轉(zhuan),因而可(ke)(ke)(ke)得到(dao)很大傳(chuan)動(dong)(dong)(dong)比(bi)(bi)(bi),一般在動(dong)(dong)(dong)力傳(chuan)動(dong)(dong)(dong)中,取傳(chuan)動(dong)(dong)(dong)比(bi)(bi)(bi)I=10-80;在分(fen)度(du)機構(gou)中,I可(ke)(ke)(ke)達1000。這樣大的傳(chuan)動(dong)(dong)(dong)比(bi)(bi)(bi)如(ru)用(yong)齒輪(lun)(lun)傳(chuan)動(dong)(dong)(dong),則需要采取多級傳(chuan)動(dong)(dong)(dong)才行,所以蝸(gua)桿(gan)傳(chuan)動(dong)(dong)(dong)結構(gou)緊(jin)湊,體積小、重量輕(qing)。
2,傳動(dong)平穩(wen),無噪音(yin)。因(yin)為蝸(gua)桿(gan)(gan)齒是(shi)連續不(bu)間斷(duan)的(de)螺旋齒,它與(yu)蝸(gua)輪齒嚙合(he)時是(shi)連續不(bu)斷(duan)的(de),蝸(gua)桿(gan)(gan)齒沒(mei)有進入和退出嚙合(he)的(de)過程,因(yin)此(ci)工(gong)作平穩(wen),沖擊、震動(dong)、噪音(yin)小。
3,蝸(gua)桿傳(chuan)動具(ju)有自(zi)鎖性。蝸(gua)桿的螺旋升角(jiao)很小時,蝸(gua)桿只能帶動蝸(gua)輪傳(chuan)動,而蝸(gua)輪不能帶動蝸(gua)桿轉動。
4,蝸桿的軸向力較(jiao)大。
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