Multistage speed control planetary gear train teaching device

The invention relates to a multistage speed control planetary gear train teaching device. The multistage speed control planetary gear train teaching device comprises a base plate, a planetary gear train and an input shaft, the planetary gear train comprises a sun gear, a planetary gear, gear ring, a planet carrier and a rotary shaft of the sun gear, and the base plate is provided with a left support seat and a right support shaft; the rotary shaft and the input shaft are coaxially arranged, a shaft sleeve coaxially arranged with the rotary shaft is arranged in the center of the planet carrier,the shaft sleeve of the planet carrier slidably sleeves the left end of the rotary shaft, a shoulder is arranged on the left side of the shaft sleeve of the left end of the rotary shaft, the right end of the rotary shaft is supported on a right support through a bearing, and the shaft sleeve is provided with a right sliding sleeve; the middle of the input shaft is supported on the left support through a bearing, and a le