Radial piston pump
AssigneeIna Walzlaber Schaeffler oHG
InventorsKlaus Scharinger, Bernd Kolbl
Life of this patent
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Abstract
A radial piston pump comprising a rotating pump shaft (2), one portion (1) of which is connected to an eccentric ring (4) which is arranged rotationally fast thereon, said radial piston pump further comprising a needle roller bearing arranged on an outer peripheral surface of the eccentric ring (4), pump plungers (13) arranged radially of the pump shaft (2) in a star pattern in a pumping housing supported by end faces on the needle roller bearing, the bearing being configured as a self-contained, inseparable assembled unit in which the eccentric ring (4) is arranged within the needle roller bearing between rims (10, 11) of the needle roller bearing which advantageously reduces the axial design space requirement and simplifies assembly.
Claims14
A radial piston pump comprising a rotating pump shaft, one portion of which is connected to an eccentric ring which is arranged rotationally fast thereon, said radial piston pump further comprising a needle roller bearing arranged on an outer peripheral surface of the eccentric ring, said needle roller bearing comprising a needle roller bushing and needle rollers arranged in rolling contact therewith between radially inwards directed rims of the needle roller bushing, an outer raceway for the needle rollers being formed by an inner peripheral surface of the needle roller bushing and an inner raceway for the needle rollers being formed by the outer peripheral surface of the eccentric ring, at least one pump plunger arranged in a pump housing and extending radially of the pump shaft being supported by an outer peripheral surface of the needle roller bushing, wherein the needle roller bearing is configured as a self-contained, inseparable assembled unit in which the eccentric ring is arranged within the needle roller bearing between the rims of the needle roller bushing.
A radial piston pump comprising a rotating pump shaft, one portion of which is connected to an eccentric ring which is arranged rotationally fast thereon, said radial piston pump further comprising a needle roller bearing arranged on an outer peripheral surface of the eccentric ring, said needle roller bearing comprising a needle roller bushing having a radially inwards directed rim, an outer raceway for the needle rollers being formed by an inner peripheral surface of the needle roller bushing and an inner raceway for the needle rollers being formed by the outer peripheral surface of the eccentric ring, at least one pump plunger arranged in a pump housing and extending radially of the pump shaft being supported by an end face on the needle roller bushing, wherein the needle roller bearing is configured as a self-contained, inseparable assembled unit in which the eccentric ring is arranged within the needle roller bearing between the rim of the needle roller bushing and a snapped-in securing element.
Dependencies are inferred from the claim text.