Adapter and surgical assistance system

An adapter comprising:

• a base comprising a bracket, a first input shaft and a second input shaft;
• a rotating base rotatably provided on the bracket;
• a rotating base transmission assembly comprising a first ring gear, wherein the first input shaft is in transmission connection with the first ring gear that is fixed with respect to the rotating base;
• a catheter system drive assembly provided on the rotating base;
• and
• a catheter system transmission assembly comprising a second ring gear and a planet gear, wherein the second input shaft is in transmission connection with the second ring gear, the second ring gear is in transmission connection with the planet gear, a shaft of the planet gear is fixed on the rotating base, and the planet gear is configured to drive the catheter system drive assembly,
• wherein the rotating base transmission assembly further comprises a first power input gear and a first transmission gear, and the first transmission gear comprises a first gear portion and a second gear portion fixedly connected to each other;
• wherein the first input shaft is sleeved with the first power input gear that is engaged with the first gear portion, and the second gear portion is engaged with the first ring gear, and
• wherein the first gear portion is connected to the second gear portion via a first gear shaft that passes through the bracket, and the first gear portion and the second gear portion are respectively located on both sides of the bracket.