Impeller assembly

The invention relates to the technical field of clothes treatment, in particular to an impeller assembly. The invention aims to solve the problem that an existing washing machine impeller cannot improve the dissolving effect of detergent in water. For solving the problem, the impeller assembly comprises a first wheel disc, a rotating wheel, a buoyancy unit and a connecting piece, wherein a throughhole is formed in the center of the first wheel disc, the first wheel disc is freely rotatably arranged on a transmission shaft of a driving device through the through hole in a sleeving manner, andthe rotating wheel is provided with a shaft hole, and is connected with the transmission shaft through the shaft hole; the connecting piece is provided with a first meshing structure and a third meshing structure, the transmission shaft and/or the rotating wheel are provided with a second meshing structure, the first wheel disc is provided with a fourth meshing structure, when the buoyancy unit moves upwards under the acti