行星減速機是(shi)一(yi)(yi)種用(yong)途廣泛的(de)工業(ye)產(chan)品，可以(yi)降低(di)電(dian)機(ji)(ji)的(de)轉(zhuan)速(su)(su)，同時(shi)(shi)(shi)增(zeng)大輸(shu)出(chu)轉(zhuan)矩。行(xing)(xing)星(xing)減(jian)(jian)速(su)(su)機(ji)(ji)可作為(wei)配套(tao)部件用(yong)于(yu)起(qi)重、挖掘、運輸(shu)、建筑等行(xing)(xing)業(ye)。行(xing)(xing)星(xing)減(jian)(jian)速(su)(su)機(ji)(ji)的(de)基本傳(chuan)動結構是(shi)：行(xing)(xing)星(xing)輪(lun)、太(tai)陽(yang)輪(lun)和內齒(chi)(chi)(chi)圈(quan)、驅(qu)動電(dian)機(ji)(ji)（馬達）。行(xing)(xing)星(xing)減(jian)(jian)速(su)(su)機(ji)(ji)回程間(jian)隙：將輸(shu)出(chu)端固定(ding)，輸(shu)入(ru)(ru)端順時(shi)(shi)(shi)針和逆(ni)時(shi)(shi)(shi)針方(fang)向旋轉(zhuan)，使輸(shu)入(ru)(ru)端產(chan)生額(e)定(ding)扭(niu)矩+-2%扭(niu)矩時(shi)(shi)(shi)，減(jian)(jian)速(su)(su)機(ji)(ji)輸(shu)入(ru)(ru)端有(you)一(yi)(yi)個微(wei)小的(de)角(jiao)位(wei)移，此角(jiao)位(wei)移就(jiu)是(shi)回程間(jian)隙.單位(wei)是(shi)”分”,就(jiu)是(shi)一(yi)(yi)度的(de)六十分之(zhi)(zhi)一(yi)(yi).也(ye)有(you)人稱之(zhi)(zhi)為(wei)背隙。行(xing)(xing)星(xing)減(jian)(jian)速(su)(su)機(ji)(ji)的(de)行(xing)(xing)星(xing)輪(lun)、太(tai)陽(yang)輪(lun)、內齒(chi)(chi)(chi)圈(quan)組成一(yi)(yi)套(tao)行(xing)(xing)星(xing)齒(chi)(chi)(chi)輪(lun)組，一(yi)(yi)套(tao)稱為(wei)一(yi)(yi)級行(xing)(xing)星(xing)減(jian)(jian)速(su)(su)機(ji)(ji)；行(xing)(xing)星(xing)減(jian)(jian)速(su)(su)機(ji)(ji)的(de)級數指的(de)是(shi)行(xing)(xing)星(xing)齒(chi)(chi)(chi)輪(lun)的(de)套(tao)數，從行(xing)(xing)星(xing)減(jian)(jian)速(su)(su)機(ji)(ji)內部結構圖可以(yi)看出(chu)行(xing)(xing)星(xing)減(jian)(jian)速(su)(su)機(ji)(ji)的(de)傳(chuan)動結構為(wei)行(xing)(xing)星(xing)輪(lun)、太(tai)陽(yang)輪(lun)和內齒(chi)(chi)(chi)圈(quan)。一(yi)(yi)級行(xing)(xing)星(xing)減(jian)(jian)速(su)(su)機(ji)(ji)指的(de)是(shi)擁有(you)一(yi)(yi)套(tao)（行(xing)(xing)星(xing)輪(lun)、太(tai)陽(yang)輪(lun)、內齒(chi)(chi)(chi)圈(quan)組成一(yi)(yi)套(tao)）的(de)減(jian)(jian)速(su)(su)機(ji)(ji)。

一級行(xing)星減(jian)速機和二級行(xing)星減(jian)速機的(de)區(qu)別(bie)：

1、兩者的區別實際(ji)就是齒輪套數的區別

2、效率(lv)的區別，二級行星(xing)減(jian)速機(ji)的效率(lv)比一級行星(xing)減(jian)速機(ji)的效率(lv)低

3、長(chang)度(du)的區(qu)別，二(er)級行(xing)星減速機(ji)比一(yi)級行(xing)星減速機(ji)要長(chang)。

4、傳動(dong)比(bi)(bi)的區別，二級行(xing)星(xing)(xing)減(jian)速機比(bi)(bi)一級行(xing)星(xing)(xing)減(jian)速機傳動(dong)比(bi)(bi)大(da)。