行星(xing)(xing)齒(chi)(chi)輪(lun)減(jian)(jian)(jian)(jian)速(su)(su)(su)(su)(su)機(ji)(ji)(ji)(ji)(ji)(ji)(ji)又(you)稱為(wei)(wei)(wei)行星(xing)(xing)減(jian)(jian)(jian)(jian)速(su)(su)(su)(su)(su)機(ji)(ji)(ji)(ji)(ji)(ji)(ji)，伺(si)服減(jian)(jian)(jian)(jian)速(su)(su)(su)(su)(su)機(ji)(ji)(ji)(ji)(ji)(ji)(ji)。在減(jian)(jian)(jian)(jian)速(su)(su)(su)(su)(su)機(ji)(ji)(ji)(ji)(ji)(ji)(ji)家(jia)族中(zhong)(zhong)，行星(xing)(xing)減(jian)(jian)(jian)(jian)速(su)(su)(su)(su)(su)機(ji)(ji)(ji)(ji)(ji)(ji)(ji)以其(qi)體(ti)積小，傳動(dong)(dong)效率高，減(jian)(jian)(jian)(jian)速(su)(su)(su)(su)(su)范圍廣(guang)，精度(du)高等(deng)諸多優點，而被廣(guang)泛應用于(yu)伺(si)服電(dian)(dian)機(ji)(ji)(ji)(ji)(ji)(ji)(ji)、步(bu)進電(dian)(dian)機(ji)(ji)(ji)(ji)(ji)(ji)(ji)、直(zhi)流電(dian)(dian)機(ji)(ji)(ji)(ji)(ji)(ji)(ji)等(deng)傳動(dong)(dong)系(xi)統中(zhong)(zhong)。其(qi)作(zuo)(zuo)用就是在保證精密傳動(dong)(dong)的前提(ti)下，主(zhu)要(yao)被用來降低(di)轉(zhuan)速(su)(su)(su)(su)(su)增大扭矩(ju)和(he)(he)降低(di)負載/電(dian)(dian)機(ji)(ji)(ji)(ji)(ji)(ji)(ji)的轉(zhuan)動(dong)(dong)慣(guan)量(liang)比。 行星(xing)(xing)齒(chi)(chi)輪(lun)減(jian)(jian)(jian)(jian)速(su)(su)(su)(su)(su)機(ji)(ji)(ji)(ji)(ji)(ji)(ji)主(zhu)要(yao)傳動(dong)(dong)結構(gou)為(wei)(wei)(wei)：行星(xing)(xing)輪(lun)，太陽輪(lun)，內齒(chi)(chi)圈(quan)。 行星(xing)(xing)減(jian)(jian)(jian)(jian)速(su)(su)(su)(su)(su)機(ji)(ji)(ji)(ji)(ji)(ji)(ji)因為(wei)(wei)(wei)結構(gou)原因，單(dan)級減(jian)(jian)(jian)(jian)速(su)(su)(su)(su)(su)小為(wei)(wei)(wei)3，大一(yi)般(ban)不(bu)超過(guo)10，常見減(jian)(jian)(jian)(jian)速(su)(su)(su)(su)(su)比為(wei)(wei)(wei)：3/4/5/6/8/10，減(jian)(jian)(jian)(jian)速(su)(su)(su)(su)(su)機(ji)(ji)(ji)(ji)(ji)(ji)(ji)級數一(yi)般(ban)不(bu)超過(guo)3，但(dan)有部分大減(jian)(jian)(jian)(jian)速(su)(su)(su)(su)(su)比定(ding)(ding)(ding)制減(jian)(jian)(jian)(jian)速(su)(su)(su)(su)(su)機(ji)(ji)(ji)(ji)(ji)(ji)(ji)有4級減(jian)(jian)(jian)(jian)速(su)(su)(su)(su)(su)。相(xiang)對其(qi)他減(jian)(jian)(jian)(jian)速(su)(su)(su)(su)(su)機(ji)(ji)(ji)(ji)(ji)(ji)(ji)，行星(xing)(xing)減(jian)(jian)(jian)(jian)速(su)(su)(su)(su)(su)機(ji)(ji)(ji)(ji)(ji)(ji)(ji)具有高剛性、高精度(du)(單(dan)級可(ke)做到1分以內)、高傳動(dong)(dong)效率(單(dan)級在97%-98%)、高的扭矩(ju)/體(ti)積比、終身免維護等(deng)特點。因為(wei)(wei)(wei)這些特點，行星(xing)(xing)減(jian)(jian)(jian)(jian)速(su)(su)(su)(su)(su)機(ji)(ji)(ji)(ji)(ji)(ji)(ji)多數是安裝在步(bu)進電(dian)(dian)機(ji)(ji)(ji)(ji)(ji)(ji)(ji)和(he)(he)伺(si)服電(dian)(dian)機(ji)(ji)(ji)(ji)(ji)(ji)(ji)上(shang)，用來降低(di)轉(zhuan)速(su)(su)(su)(su)(su)，提(ti)升扭矩(ju)，匹配慣(guan)量(liang)。行星(xing)(xing)減(jian)(jian)(jian)(jian)速(su)(su)(su)(su)(su)機(ji)(ji)(ji)(ji)(ji)(ji)(ji)額(e)定(ding)(ding)(ding)輸(shu)入轉(zhuan)速(su)(su)(su)(su)(su)高可(ke)達到18000rpm(與(yu)減(jian)(jian)(jian)(jian)速(su)(su)(su)(su)(su)機(ji)(ji)(ji)(ji)(ji)(ji)(ji)本身大小有關(guan)，減(jian)(jian)(jian)(jian)速(su)(su)(su)(su)(su)機(ji)(ji)(ji)(ji)(ji)(ji)(ji)越大，額(e)定(ding)(ding)(ding)輸(shu)入轉(zhuan)速(su)(su)(su)(su)(su)越小)以上(shang)，工作(zuo)(zuo)溫度(du)一(yi)般(ban)在-25℃到100℃左(zuo)右，通過(guo)改變(bian)潤滑脂可(ke)改變(bian)其(qi)工作(zuo)(zuo)溫度(du)。 精密行星(xing)(xing)減(jian)(jian)(jian)(jian)速(su)(su)(su)(su)(su)機(ji)(ji)(ji)(ji)(ji)(ji)(ji)因搭配伺(si)服電(dian)(dian)機(ji)(ji)(ji)(ji)(ji)(ji)(ji)所以背隙(xi)等(deng)級(弧分)相(xiang)當重要(yao)，不(bu)同背隙(xi)等(deng)級價(jia)格差異相(xiang)當大，行星(xing)(xing)減(jian)(jian)(jian)(jian)速(su)(su)(su)(su)(su)機(ji)(ji)(ji)(ji)(ji)(ji)(ji)可(ke)做多齒(chi)(chi)箱連結高減(jian)(jian)(jian)(jian)速(su)(su)(su)(su)(su)比達100000。