Patent ID: 9145972
Filing Date: 2015-09-29
Classification: F04D,F16J

Abstract:
1. A coupling structure for connecting an impeller to a motor shaft of a liquid pump, comprising: a carrier rod sleeved on the shaft, a middle member fixed on the carrier rod, and a rotating seal sleeved on the carrier rod and fixed to the middle member via an interlocking structure, the middle member being separately formed with the rotating seal and the carrier rod, the rotating seal being circumferentially interlocked with the carrier rod via the interlocking structure; wherein the middle member is a macerator fixed to the carrier rod, disposed between the impeller and the rotating seal, and arranged to limit axial movement of the rotating seal along the carrier rod; wherein the macerator is directly keyed to the carrier rod for rotation there with; wherein the interlocking structure includes notches formed on one of the rotating seal and the macerator and corresponding ribs formed on the other one of the rotating seal and the macerator; wherein the interlocking structure includes fingers formed on one of the rotating seal and the macerator and disposed within corresponding recesses formed on the other one of the rotating seal and the macerator; wherein the macerator comprises an inner tube and an outer tube, each rib is directly connected between the inner tube and the outer tube, each recess is formed by the inner tube, the two adjacent ribs and the outer tube.