齒式聯軸器是由齒(chi)(chi)(chi)(chi)(chi)數相同的(de)(de)(de)(de)(de)內(nei)齒(chi)(chi)(chi)(chi)(chi)圈和(he)(he)帶外(wai)齒(chi)(chi)(chi)(chi)(chi)的(de)(de)(de)(de)(de)凸緣半聯(lian)軸器(qi)等零件組(zu)成。外(wai)齒(chi)(chi)(chi)(chi)(chi)分為直(zhi)齒(chi)(chi)(chi)(chi)(chi)和(he)(he)鼓形(xing)齒(chi)(chi)(chi)(chi)(chi)兩(liang)種齒(chi)(chi)(chi)(chi)(chi)形(xing),所謂鼓形(xing)齒(chi)(chi)(chi)(chi)(chi)即為將(jiang)外(wai)齒(chi)(chi)(chi)(chi)(chi)制成球(qiu)面,球(qiu)面中(zhong)心在齒(chi)(chi)(chi)(chi)(chi)輪(lun)軸線(xian)(xian)上(shang),齒(chi)(chi)(chi)(chi)(chi)側間隙(xi)較一般齒(chi)(chi)(chi)(chi)(chi)輪(lun)大(da),鼓形(xing)齒(chi)(chi)(chi)(chi)(chi)聯(lian)軸器(qi)可允(yun)許(xu)較大(da)的(de)(de)(de)(de)(de)角(jiao)位(wei)移(yi)(相對(dui)于直(zhi)齒(chi)(chi)(chi)(chi)(chi)聯(lian)軸器(qi)),可改善齒(chi)(chi)(chi)(chi)(chi)的(de)(de)(de)(de)(de)接觸條件,提高傳遞轉(zhuan)矩的(de)(de)(de)(de)(de)能力,延長使用壽命。齒(chi)(chi)(chi)(chi)(chi)式聯(lian)軸器(qi)由兩(liang)個帶有內(nei)齒(chi)(chi)(chi)(chi)(chi)及凸緣的(de)(de)(de)(de)(de)外(wai)套和(he)(he)兩(liang)個帶有外(wai)齒(chi)(chi)(chi)(chi)(chi)的(de)(de)(de)(de)(de)內(nei)套筒組(zu)成。依靠內(nei)外(wai)齒(chi)(chi)(chi)(chi)(chi)相嚙合(he)傳遞扭(niu)矩。齒(chi)(chi)(chi)(chi)(chi)輪(lun)的(de)(de)(de)(de)(de)齒(chi)(chi)(chi)(chi)(chi)廓曲線(xian)(xian)為漸開線(xian)(xian),嚙合(he)角(jiao)為20°。這類聯(lian)軸器(qi)能傳遞很大(da)的(de)(de)(de)(de)(de)轉(zhuan)矩,并允(yun)許(xu)有較大(da)的(de)(de)(de)(de)(de)偏移(yi)量,安裝精(jing)度要求不(bu)高,常用于重(zhong)型機(ji)械(xie)中(zhong)。
齒式聯軸器所用齒(chi)輪(lun)的(de)(de)齒(chi)廓曲線(xian)(xian)為(wei)漸(jian)開線(xian)(xian),壓力角(jiao)為(wei)20度,齒(chi)數(shu)一般(ban)為(wei)30-80,材料一般(ban)為(wei)45#鋼。這類聯(lian)(lian)軸器(qi)能傳遞(di)很大的(de)(de)轉(zhuan)矩,并允(yun)許(xu)有(you)較大的(de)(de)偏移量,安裝精度要求不高,但質量較大,成本較高,在重型(xing)機械中廣泛應用。由兩個帶(dai)有(you)內齒(chi)及凸緣的(de)(de)外(wai)(wai)套筒和兩個帶(dai)有(you)外(wai)(wai)齒(chi)的(de)(de)內套筒組成。兩個帶(dai)外(wai)(wai)齒(chi)的(de)(de)半聯(lian)(lian)軸器(qi),兩個帶(dai)內齒(chi)的(de)(de)外(wai)(wai)殼,聯(lian)(lian)接螺栓特點是(shi)齒(chi)形為(wei)漸(jian)開線(xian)(xian),一般(ban)外(wai)(wai)齒(chi)齒(chi)頂承橢球面,且(qie)與(yu)內齒(chi)嚙(nie)(nie)合(he)后有(you)適當的(de)(de)頂隙和側隙,允(yun)許(xu)較大的(de)(de)綜合(he)位(wei)移。外(wai)(wai)殼內貯油,以便潤滑嚙(nie)(nie)合(he)齒(chi)輪(lun)。因嚙(nie)(nie)合(he)傳動,傳遞(di)轉(zhuan)矩大,制造困難,成本高。
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