| 摘要 |
<p>The invention relates to an impeller assembly and a pump for pumping a liquid, comprising a pump chamber and an impeller (4) arranged to rotate in said pump chamber, said impeller being suspended in a lower end (5) of an axially extending drive shaft unit (6), wherein said lower end (5) of the drive shaft unit (6) is received in a cylinder-shaped recess (10) of the impeller (4), wherein the impeller (4) is displaceable back and forth in the axial direction in relation to the drive shaft unit (6) between a lower position and an upper position. The pump further comprises a snap-lock coupling arranged at the interface between the drive shaft unit (6) and the cylinder-shaped recess (10), wherein the snap-lock coupling is adapted to position the impeller (4) in the lower position when an applied force acting to displace the impeller (4) in direction away from the lower position is below a threshold value.</p> |
