凸輪軸傳動
凸輪(lun)(lun)(lun)軸(zhou)與(yu)曲軸(zhou)之間的常見傳(chuan)動(dong)(dong)方式包括(kuo)齒輪(lun)(lun)(lun)傳(chuan)動(dong)(dong)、鏈(lian)條傳(chuan)動(dong)(dong)以及齒形膠帶傳(chuan)動(dong)(dong)。下(xia)置凸輪(lun)(lun)(lun)軸(zhou)和中置凸輪(lun)(lun)(lun)軸(zhou)與(yu)曲軸(zhou)之間的傳(chuan)動(dong)(dong)大多采(cai)(cai)用(yong)圓(yuan)柱(zhu)形正(zheng)時齒輪(lun)(lun)(lun)傳(chuan)動(dong)(dong),一般從(cong)曲軸(zhou)到凸輪(lun)(lun)(lun)軸(zhou)只需要一對齒輪(lun)(lun)(lun)傳(chuan)動(dong)(dong),如果傳(chuan)動(dong)(dong)齒輪(lun)(lun)(lun)直徑過大,可(ke)以再增加1個中間惰輪(lun)(lun)(lun)。為(wei)了嚙合平(ping)穩并降低工作(zuo)噪聲,正(zheng)時齒輪(lun)(lun)(lun)大多采(cai)(cai)用(yong)斜(xie)齒輪(lun)(lun)(lun)。
鏈(lian)(lian)條(tiao)(tiao)傳(chuan)動(dong)(dong)常見于頂(ding)置(zhi)凸(tu)(tu)輪軸(zhou)(zhou)(zhou)與曲軸(zhou)(zhou)(zhou)之間,但(dan)其(qi)工作(zuo)(zuo)可(ke)(ke)靠(kao)性(xing)和耐(nai)久性(xing)不如齒(chi)輪傳(chuan)動(dong)(dong)。在高轉速發動(dong)(dong)機上(shang)廣泛使(shi)用齒(chi)形(xing)膠(jiao)(jiao)帶(dai)代替(ti)傳(chuan)動(dong)(dong)鏈(lian)(lian)條(tiao)(tiao),但(dan)在一些大功率發動(dong)(dong)機上(shang)仍然使(shi)用鏈(lian)(lian)條(tiao)(tiao)傳(chuan)動(dong)(dong)。齒(chi)形(xing)膠(jiao)(jiao)帶(dai)具有工作(zuo)(zuo)噪聲(sheng)小、工作(zuo)(zuo)可(ke)(ke)靠(kao)以及成本低等特點。對于雙(shuang)頂(ding)置(zhi)凸(tu)(tu)輪軸(zhou)(zhou)(zhou),一般(ban)是排氣(qi)凸(tu)(tu)輪軸(zhou)(zhou)(zhou)通(tong)過正(zheng)時齒(chi)形(xing)膠(jiao)(jiao)帶(dai)或鏈(lian)(lian)條(tiao)(tiao)由曲軸(zhou)(zhou)(zhou)驅(qu)動(dong)(dong),進氣(qi)凸(tu)(tu)輪軸(zhou)(zhou)(zhou)通(tong)過金屬鏈(lian)(lian)條(tiao)(tiao)由排氣(qi)凸(tu)(tu)輪軸(zhou)(zhou)(zhou)驅(qu)動(dong)(dong),或進氣(qi)凸(tu)(tu)輪軸(zhou)(zhou)(zhou)和排氣(qi)凸(tu)(tu)輪軸(zhou)(zhou)(zhou)均由曲軸(zhou)(zhou)(zhou)通(tong)過齒(chi)形(xing)膠(jiao)(jiao)帶(dai)或鏈(lian)(lian)條(tiao)(tiao)驅(qu)動(dong)(dong)。