A double-motor U-shaped
cutting portion of a thin seam mining
machine comprises a
rocker arm casing, two
cutting motors, a
rocker arm reduction gearbox and a
cutting roller. A motor installing cavity of the
rocker arm casing and an extending end of the rocker arm casing are on the same side, and the contour of the motor installing cavity and the contour of extending end of the rocker arm casing are in a U shape, and the extending end of the rocker arm casing is elongated. The rocker arm reduction gearbox comprises a
clutch, a third-stage idle gear, a fourth-stage cylindrical gear and a planetary gear mechanism, the
clutch is arranged on a third-stage cutting shaft group of a transmission chain, the planetary gear mechanism is arranged at the
tail end of the transmission chain, the two cutting motors transmit power to the rocker arm reduction gearbox through a first idle gear and a second idle gear, the power is transmitted to the cutting roller after
speed reduction through the fourth-stage cylindrical gear and the planetary gear mechanism, an
involute spline of the third-stage cutting shaft group of the transmission chain is disconnected by pulling a
clutch handle, and the transmission chain is
cut off so as to avoid accidents during overhaul. The cutting portion is large in installed power, strong in mining capability, good in
coal charging effect, safe and reliable, and a large cutting deep roller can be installed to develop a hard-
coal working surface.