| CPC A61F 2/2466 (2013.01) [A61F 2/246 (2013.01)] | 13 Claims |

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1. An adapter comprising:
a base comprising a bracket and a sun gear rotatably provided on the bracket, the bracket being provided with a first input shaft and a second input shaft, and the second input shaft being in transmission connection with the sun gear;
a first drive assembly rotatably provided on the bracket and in transmission connection with the first input shaft, wherein the first drive assembly includes a planet carrier on which a planet gear is provided; and
a second drive assembly provided on the planet carrier and in transmission connection with the sun gear via the planet gear, wherein when the second drive assembly rotates with the planet carrier, the planet gear moves along a peripheral surface of the sun gear under the drive of the planet carrier.
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