Intermediate shaft assembly of speed reducer

According to the intermediate shaft assembly of the speed reducer, the one-way clutch is added to serve as a disconnection mechanism, and power combination in one direction and power disconnection in the other direction can be achieved. The intermediate shaft assembly of the speed reducer comprises an intermediate shaft, a lining, an outer gear and a one-way clutch. And the bushing is in spline connection with the intermediate shaft. The outer gear corresponds to the lining. The one-way clutch is arranged between the lining and the outer gear, the lining serves as an inner ring roller path of the one-way clutch, and the outer gear serves as an outer ring roller path of the one-way clutch. When the outer gear rotates towards a first direction, the one-way clutch is locked so as to drive the intermediate shaft to rotate through the lining. And when the outer gear rotates towards a second direction, the one-way clutch is not locked, so that the outer gear rotates freely. The first direction is opposite to the se