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US 5,326,235 AGranted
Electric motor with attached pump
AssigneeSWF Auto-Electric GmbH
InventorRainer Bruhn
Life of this patent
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AssigneeSWF Auto-Electric GmbH
InventorRainer Bruhn
Estimating the term…
In order to connect a pump (1) with an electric motor (2) quickly and form-fittingly, a hollow, tappet-shaped stud (6) is formed onto the pot-shaped motor housing (7), specifically onto the bottom of the pot (10). The stud engages an insertion recess (5) of the pump. A driving eccentric (4) of the driven shaft (3) is connected with the pump during the assembly of the pump. If the inside of the tappet-shaped stud (6) is to receive the first motor bearing, a fit is needed at the inside as well as at the outside of the stud. If the motor housing (7) is made from deep drawn sheet metal, the double fit is only possible, if, when viewed in the circumferential direction, the cross section of the wall of the stud (6) is formed like a wave. This facilitates the use of a plastic cover (18) in connection with the sheet metal housing (7) and the avoidance of a carbon brush support plate. In connection with a further embodiment, the lack of a support plate facilitates an automatic assembly of the motor (2) as well as the combination with plug connections and electronic housings.
An electric motor connected with a pump, whereby the housing of the pump comprises a cylindrical insertion recess for a tappet-shaped stud of the motor housing which engages therein and whereby this stud additionally receives the first bearing, free from play, of the motor armature at the side of the pump and has an aperture for the armature and the motor driven shaft, wherein the housing of the motor is formed as a pot-shaped member deep drawn from a metal blank, the opening of the pot, facing away from the pump of said drawn member, is closed by a cover receiving the second bearing of the motor armature, and wherein, seen in the circumferential direction, the cross section of the wall of the stud, which protrudes from the bottom of the pot axially, is formed wave-like and has longitudinal flutes and which form fittingly engages into the insertion recess of the pump.
An electric motor and pump unit comprising:
Dependencies are inferred from the claim text.