Oil pump arrangement in a transmission
AssigneeZF Friedrichshafen AG
InventorsThomas Schneider, Uwe Firzlaff
Life of this patent
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Abstract
An arrangement of an oil pump (8) and its drive in a transmission (1) that has a transmission housing (2) and at least one transmission shaft (3). The oil pump (8) is arranged coaxially with the at least one transmission shaft (3). The oil pump (8) is arranged on and can be driven by the at least one transmission shaft (3).
Claims20
An arrangement of an oil pump (8) and a drive element (10) of the oil pump (8) in a transmission (1) comprising:
- a transmission housing (2),
- at least one transmission shaft (3),
- the oil pump (8) being arranged coaxially with the at least one transmission shaft (3),
- the oil pump (8) being arranged on and drivable by the at least one transmission shaft (3),
- a sleeve (5a) being fixedly connected to the at least one transmission shaft (3), and
- the sleeve being disposed between and coupling the at least one transmission shaft (3) to the oil pump (8),
- wherein the oil pump is a roller cell oil pump (8).
An arrangement of an oil pump (8) and a drive of the oil pump (8) in a transmission (1) comprising:
- a transmission housing (2), and
- at least one transmission shaft (3),
- the oil pump (8) being arranged coaxially with the at least one transmission shaft (3) and drivable by the at least one transmission shaft (3),
- the oil pump (8) having a pump housing (9) which is one of supported in the transmission housing (2) and formed as part of the transmission housing (2), and
- the pump housing (9) being supported, relative to the transmission housing (2), by a cup spring (12).
An arrangement of an oil pump (8) in a transmission (1), the arrangement comprising:
- an oil pump wheel (10) having an inner surface and an outer surface, the inner surface of the oil pump wheel (10) comprising a plurality of inner grooves (15) and the outer surface of the oil pump wheel (10) comprising a plurality of outer grooves (17), the oil pump wheel (10) being housed within a bore of an oil pump housing (9), and the bore being eccentric with respect to the outer surface of the oil pump wheel (10);
- a sleeve (5a) being supported by a transmission shaft (3) such that the sleeve (5a) and the transmission shaft (3) rotate in unison around a rotational axis, and the sleeve (5a) comprising an outer surface which has a plurality of channels (13);
- the oil pump wheel (10) being concentrically supported on the sleeve (5a) by a plurality of balls (14), and the balls (14) communicating, on one side, with the plurality of inner grooves (15) of the oil pump wheel (10) and, on another side, with the plurality of channels (13) of the sleeve (5a) such that the oil pump wheel (10) is axially slidable and rotationally fixed with respect to the sleeve (5a), and the oil pump wheel (10) thereby being rotationally driven by the sleeve (5a);
- and
- a plurality of roller elements (18) are received and radially movable within the plurality of outer grooves (17) of the oil pump wheel (10) such that rotation of the oil pump wheel (10), within the eccentric bore of the oil pump housing (9), causes the plurality of roller elements (18) to move to and fro within the plurality of outer grooves (17) of the oil pump wheel (10) and displace oil into a sickle-shaped gap (19) between the pump housing (9) and the pump wheel (10).
Dependencies are inferred from the claim text.