Liquid pump, in particular, detergent liquid pump for household appliances, and method for assembling it
First Claim
1. A liquid pump, comprising:
- a permanently excited rotor;
a split cage having an outside and an axial end and defining an interior accommodating said permanently excited rotor;
a stator radially situated on said outside of said split cage;
a pump impeller;
a rotor shaft having a shaft end; and
a pump casing defining a casing interior accommodating said pump impeller on said shaft end;
said pump casing connected to said axial end of said split cage;
said pump casing and said split cage retained together through an axial plug fit; and
said pump casing and said stator retained together through an axial plug-fit.
1 Assignment
0 Petitions
Accused Products
Abstract
A liquid pump includes a rotor, a rotor shaft, and a split cage for accommodating the rotor. A stator assembly is situated outside the split cage, and a pump casing has a pump-casing bottom and top part, a flange part, and a plug-in holder. The pump casing accomodates a pump impeller on the shaft, and the pump-casing top part has a plug-in holder. A method for assembling the liquid pump includes axially pressing a bearing into a bearing holder. O-rings are mounted on the split cage. The rotor is axially inserted into the split cage, which is axially pressed into the plug-in holder of the pump casing. The rotor shaft is simultaneously pressed into the pump impeller. The bearing holder has another supporting part and is axially pressed into the split cage. A cap together with the stator assembly are axially mounted onto the plug-in holder. The pump-casing bottom part is connected to the pump-casing top part, preferably with a pump-casing seal in between.
2 Citations
30 Claims
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1. A liquid pump, comprising:
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a permanently excited rotor;
a split cage having an outside and an axial end and defining an interior accommodating said permanently excited rotor;
a stator radially situated on said outside of said split cage;
a pump impeller;
a rotor shaft having a shaft end; and
a pump casing defining a casing interior accommodating said pump impeller on said shaft end;
said pump casing connected to said axial end of said split cage;
said pump casing and said split cage retained together through an axial plug fit; and
said pump casing and said stator retained together through an axial plug-fit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A detergent liquid pump for household appliances to be driven by a single-phase synchronous motor having a permanently magnetic rotor, comprising:
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a split cage having an outside and an axial end and defining an interior accommodating said permanently magnetic rotor;
a stator radially situated on said outside of said split cage;
a pump impeller;
a rotor shaft having a shaft end; and
a pump casing defining a casing interior accommodating said pump impeller on said shaft end;
said pump casing connected to said axial end of said split cage;
said pump casing and said split cage retained together through an axial plug fit; and
said pump casing and said stator retained together through an axial plug-fit.
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26. A method for assembling a liquid pump, which comprises:
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providing a liquid pump having;
a permanently excited rotor;
a pot-shaped split cage having an outside, a drive end, and a non-drive end and defining an interior accommodating the permanently excited rotor;
a wound stator assembly to be radially situated on the outside of the split cage;
a pump impeller;
a rotor shaft having a drive end; and
a pump casing having a pump-casing top part, a pump-casing bottom part, a flange part, and a plug-in holder, the pump casing defining a casing interior accommodating the pump impeller on the shaft end, and the pump-casing top part having a plug-in holder;
axially pressing a drive-end bearing into a drive-end bearing holder at the drive end of the split cage from the non-drive end;
mounting flexible intermediate supporting parts on the drive end of the split cage;
axially inserting the rotor into the split cage from the non-drive end;
axially pressing the drive end of the split cage into the plug-in holder of the pump casing for retaining the split cage at the pump casing and simultaneously pressing the drive end of the rotor shaft into the pump impeller, the pump impeller being supported from the drive end of the rotor shaft in the pump-casing top part;
mounting a flexible intermediate supporting part on a non-drive-end bearing holder prefitted with a bearing;
axially pressing the non-drive-end bearing holder into the split cage from the non-drive end;
axially mounting a cap together with the wound stator assembly onto the plug-in holder of the pump-casing top part in a direction from the non-drive end of the split cage for retaining the stator at the pump casing and bringing the cap and the stator assembly to bear on the flange part;
connecting the pump-casing bottom part to the pump-casing top part. - View Dependent Claims (27, 28, 29, 30)
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Specification