凸輪軸傳動
凸輪(lun)(lun)軸(zhou)(zhou)與(yu)曲(qu)軸(zhou)(zhou)之間的常(chang)見傳動(dong)(dong)(dong)方式包(bao)括齒(chi)(chi)(chi)輪(lun)(lun)傳動(dong)(dong)(dong)、鏈條傳動(dong)(dong)(dong)以及齒(chi)(chi)(chi)形膠帶(dai)傳動(dong)(dong)(dong)。下置(zhi)凸輪(lun)(lun)軸(zhou)(zhou)和中置(zhi)凸輪(lun)(lun)軸(zhou)(zhou)與(yu)曲(qu)軸(zhou)(zhou)之間的傳動(dong)(dong)(dong)大多采用圓柱形正(zheng)時(shi)齒(chi)(chi)(chi)輪(lun)(lun)傳動(dong)(dong)(dong),一般(ban)從曲(qu)軸(zhou)(zhou)到凸輪(lun)(lun)軸(zhou)(zhou)只需要(yao)一對齒(chi)(chi)(chi)輪(lun)(lun)傳動(dong)(dong)(dong),如(ru)果傳動(dong)(dong)(dong)齒(chi)(chi)(chi)輪(lun)(lun)直徑(jing)過大,可以再增加(jia)1個中間惰輪(lun)(lun)。為了(le)嚙合平穩并(bing)降(jiang)低工作(zuo)噪聲,正(zheng)時(shi)齒(chi)(chi)(chi)輪(lun)(lun)大多采用斜齒(chi)(chi)(chi)輪(lun)(lun)。
鏈(lian)(lian)條傳動(dong)(dong)(dong)(dong)常(chang)見于頂(ding)(ding)置凸(tu)(tu)輪(lun)(lun)軸(zhou)(zhou)(zhou)與曲軸(zhou)(zhou)(zhou)之間,但(dan)其工(gong)作可(ke)靠(kao)性(xing)和耐(nai)久性(xing)不如齒(chi)(chi)輪(lun)(lun)傳動(dong)(dong)(dong)(dong)。在高轉速發(fa)動(dong)(dong)(dong)(dong)機上(shang)廣泛使用齒(chi)(chi)形(xing)膠帶代替傳動(dong)(dong)(dong)(dong)鏈(lian)(lian)條,但(dan)在一些(xie)大功率發(fa)動(dong)(dong)(dong)(dong)機上(shang)仍(reng)然使用鏈(lian)(lian)條傳動(dong)(dong)(dong)(dong)。齒(chi)(chi)形(xing)膠帶具有工(gong)作噪聲小、工(gong)作可(ke)靠(kao)以及成本低等特點。對于雙頂(ding)(ding)置凸(tu)(tu)輪(lun)(lun)軸(zhou)(zhou)(zhou),一般是排(pai)氣(qi)(qi)凸(tu)(tu)輪(lun)(lun)軸(zhou)(zhou)(zhou)通(tong)過(guo)(guo)正時齒(chi)(chi)形(xing)膠帶或鏈(lian)(lian)條由曲軸(zhou)(zhou)(zhou)驅動(dong)(dong)(dong)(dong),進氣(qi)(qi)凸(tu)(tu)輪(lun)(lun)軸(zhou)(zhou)(zhou)通(tong)過(guo)(guo)金(jin)屬鏈(lian)(lian)條由排(pai)氣(qi)(qi)凸(tu)(tu)輪(lun)(lun)軸(zhou)(zhou)(zhou)驅動(dong)(dong)(dong)(dong),或進氣(qi)(qi)凸(tu)(tu)輪(lun)(lun)軸(zhou)(zhou)(zhou)和排(pai)氣(qi)(qi)凸(tu)(tu)輪(lun)(lun)軸(zhou)(zhou)(zhou)均由曲軸(zhou)(zhou)(zhou)通(tong)過(guo)(guo)齒(chi)(chi)形(xing)膠帶或鏈(lian)(lian)條驅動(dong)(dong)(dong)(dong)。

