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減速(su)(su)器是一(yi)種由封(feng)閉在剛性殼的(de)齒輪(lun)傳動(dong)(dong)、蝸(gua)桿(gan)(gan)傳動(dong)(dong)、齒輪(lun)-蝸(gua)桿(gan)(gan)傳動(dong)(dong)所組成的(de)部件,施工(gong)升降機(ji)樓(lou)層(ceng)呼叫器常用(yong)作原動(dong)(dong)件與工(gong)作機(ji)之(zhi)間的(de)減速(su)(su)傳動(dong)(dong)裝(zhuang)置 。在原動(dong)(dong)機(ji)和工(gong)作機(ji)或執行(xing)機(ji)構之(zhi)間起(qi)匹配轉速(su)(su)和傳遞轉矩的(de)作用(yong),在現代機(ji)械中應用(yong)比較普遍(bian)。
減(jian)(jian)速(su)機(ji)一般用(yong)于低轉速(su)大(da)扭矩的(de)(de)傳(chuan)動(dong)(dong)設備,把(ba)電動(dong)(dong)機(ji)、內(nei)燃機(ji)或(huo)其它高(gao)速(su)運轉的(de)(de)動(dong)(dong)力通過減(jian)(jian)速(su)機(ji)的(de)(de)輸入軸上的(de)(de)齒(chi)(chi)數少的(de)(de)齒(chi)(chi)輪(lun)嚙合輸出軸上的(de)(de)大(da)齒(chi)(chi)輪(lun)來達(da)到(dao)減(jian)(jian)速(su)的(de)(de)目的(de)(de),普通的(de)(de)減(jian)(jian)速(su)機(ji)也(ye)會有(you)幾對相同原理齒(chi)(chi)輪(lun)達(da)到(dao)理想的(de)(de)減(jian)(jian)速(su)成(cheng)效(xiao),大(da)小(xiao)齒(chi)(chi)輪(lun)的(de)(de)齒(chi)(chi)數之比,就是傳(chuan)動(dong)(dong)比。
減(jian)速(su)機在原動(dong)(dong)(dong)機和(he)工作(zuo)機或執行(xing)機構之間(jian)起(qi)匹(pi)配轉速(su)和(he)傳(chuan)遞轉矩(ju)的(de)(de)作(zuo)用,是一種(zhong)(zhong)相對精(jing)密的(de)(de)機械(xie)。使用它(ta)的(de)(de)目的(de)(de)是減(jian)少轉速(su),增加轉矩(ju)。它(ta)的(de)(de)種(zhong)(zhong)類(lei)繁多(duo),型(xing)號各異(yi),不同(tong)(tong)種(zhong)(zhong)類(lei)有不同(tong)(tong)的(de)(de)用途。減(jian)速(su)器(qi)(qi)(qi)的(de)(de)種(zhong)(zhong)類(lei)繁多(duo),按(an)(an)照(zhao)傳(chuan)動(dong)(dong)(dong)類(lei)型(xing)可(ke)分(fen)為齒(chi)(chi)輪(lun)(lun)減(jian)速(su)器(qi)(qi)(qi)、蝸(gua)桿減(jian)速(su)器(qi)(qi)(qi)和(he)行(xing)星(xing)齒(chi)(chi)輪(lun)(lun)減(jian)速(su)器(qi)(qi)(qi);按(an)(an)照(zhao)傳(chuan)動(dong)(dong)(dong)級(ji)數不同(tong)(tong)可(ke)分(fen)為單(dan)級(ji)和(he)多(duo)級(ji)減(jian)速(su)器(qi)(qi)(qi);按(an)(an)照(zhao)齒(chi)(chi)輪(lun)(lun)形狀(zhuang)可(ke)分(fen)為圓柱齒(chi)(chi)輪(lun)(lun)減(jian)速(su)器(qi)(qi)(qi)、圓錐(zhui)(zhui)齒(chi)(chi)輪(lun)(lun)減(jian)速(su)器(qi)(qi)(qi)和(he)圓錐(zhui)(zhui)-圓柱齒(chi)(chi)輪(lun)(lun)減(jian)速(su)器(qi)(qi)(qi);按(an)(an)照(zhao)傳(chuan)動(dong)(dong)(dong)的(de)(de)布置形式(shi)又可(ke)分(fen)為展開式(shi)、分(fen)流式(shi)和(he)同(tong)(tong)軸(zhou)式(shi)減(jian)速(su)器(qi)(qi)(qi)。