Gear box for lubricating support bearing

The invention relates to the technical field of gear boxes, and discloses a gear box for lubricating a support bearing. The gear box comprises a first box body, a planet carrier, an oil collecting box, an oil receiving tray and an end cover. The first box body is provided with the support bearing and an oil inlet hole; one end of the planet carrier penetrates through the support bearing, and the planet carrier and the first box body form an accommodating cavity; the oil collecting box is arranged on the planet carrier and is provided with an oil collecting cavity and an oil outlet; the oil receiving tray is arranged on the first box body and is provided with a drainage groove; and the end cover is arranged on the side, away from the accommodating cavity, of the first box body, the end cover is provided with a first flow guide groove, one end of the first flow guide groove communicates with the oil inlet hole, and the other end of the first flow guide groove is opposite to the support bearing. The gear box for