A pump drive of an automatic transmission with a hydrodynamic torque converter driven by a drive motor and with an oil pump driven by a pump wheel of the torque converter. The pump wheel of the torque converter is connected to a converter hub that extends from the pump wheel in the direction opposit
A pump drive of an automatic transmission with a hydrodynamic torque converter driven by a drive motor and with an oil pump driven by a pump wheel of the torque converter. The pump wheel of the torque converter is connected to a converter hub that extends from the pump wheel in the direction opposite the drive motor and is mounted radially by way of a converter hub bearing in or on a wall of the automatic transmission fixed with respect to the transmission housing and radially encloses a section of a pump drive shaft of the oil pump. The pump drive shaft is radially centered in the converter hub and, on its side facing toward the drive motor, is connected to the converter hub by a driving profile.
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1. A pump drive of an automatic transmission (1) with a hydrodynamic torque converter (10) driven by a drive motor (MOT) and an oil pump (49) driven by a pump wheel (11) of the torque converter (10), the pump wheel (11) of the torque converter (10) being connected to a converter hub (12) that extend
1. A pump drive of an automatic transmission (1) with a hydrodynamic torque converter (10) driven by a drive motor (MOT) and an oil pump (49) driven by a pump wheel (11) of the torque converter (10), the pump wheel (11) of the torque converter (10) being connected to a converter hub (12) that extends from the pump wheel (11) of the torque converter (10) in the direction opposite the drive motor (MOT), the converter hub (12) is radially supported by a converter hub bearing (22) in or on a wall (21, 21a) of the automatic transmission (1) fixed with respect to a transmission housing, and radially encloses a section of a pump drive shaft (40) of the oil pump (49), the pump drive shaft (40) is radially centered in the converter hub (12) and on a side facing toward the drive motor (MOT), being connected by positive interlock to the converter hub (12) by a driving profile (41). 2. The pump drive according to claim 1, wherein centering mechanisms (43) are provided for the pump drive shaft (40) which, viewed spatially, are arranged on a side of the driving profile (41) of the pump drive shaft (40) facing away from the drive motor (MOT). 3. The pump drive according to claim 1, wherein the pump drive shaft is radially centered in the converter hub of the torque converter by way of a driving profile of the pump drive shaft. 4. The pump drive according to claim 1, wherein centering mechanisms (43) for the pump drive shaft are provided which, viewed spatially, are arranged on a side of the driving profile of the pump drive shaft facing toward the drive motor. 5. The pump drive according to claim 1, wherein the pump drive shaft (40) is statically sealed relative to the converter hub (12) by a sealing ring (42), the statically sealing ring (42), viewed in the radial direction, is arranged between the pump drive shaft (40) and the converter hub (12) and, viewed in the axial direction, is arranged adjacent the driving profile (41) of the pump drive shaft (40) on a side of the driving profile (41) remote from the drive motor (MOT). 6. The pump drive according to claim 1, wherein the pump drive shaft (40) is rotationally sealed by a sealing ring (44) relative to a housing hub (24) fixed on the transmission housing, which is connected positively to a guide wheel (14) of the torque converter (10), the rotationally sealing ring (44), viewed in the radial direction, is arranged between the pump drive shaft (40) and the housing hub (24) and, viewed in the axial direction, is arranged on a side of the pump drive shaft (40) remote from the drive motor (MOT). 7. The pump drive according to claim 1, wherein the converter hub (12) is rotationally sealed relative to the wall (21), the rotationally sealing ring (23), viewed in the radial direction, is arranged between the converter hub (12) and an inside diameter of a bore in the wall (21) fixed with respect to the transmission housing and, viewed in the axial direction, being arranged on a side of the converter hub bearing (22) facing the drive motor (MOT) and toward the driving profile (41) of the pump drive shaft (40). 8. The pump drive according to claim 1, wherein the oil pump (49) is arranged non-co-axially with the torque converter (10) and is connected to the pump wheel (11) of the torque converter (10) by way of one of a chain drive, a spur drive or a bevel drive, the pump drive shaft (40) is connected to one of a driven chain wheel (45) of the chain drive, a driven spur gear of the spur drive or a driven bevel gear of the bevel drive, and a follower chain wheel (47) of the chain drive is driven by one of a chain (46), a follower spur gear of the spur drive, or a follower bevel gear of the bevel drive, being connected to one of a pump input shaft (48) or a pump wheel of the oil pump (49). 9. The pump drive according to claim 8, wherein the pump drive shaft (40) and one of the driven chain wheel (45), the driven spur gear or the driven bevel gear are made integrally, as one piece. 10. The pump drive according to claim 1, wherein the oil pump is arranged co-axially with the torque converter, and the pump drive shaft is connected to a pump wheel of the oil pump. 11. The pump drive according to claim 10, wherein the pump drive shaft and the pump wheel of the oil pump are made integrally, as one piece. 12. A pump drive of an automatic transmission (1) with a hydrodynamic torque converter (10) driven by a drive motor (MOT), the pump drive comprising: a pump wheel (11) of the hydrodynamic torque converter (10) is fixed to a converter hub (12), which extends from the pump wheel (11) in a direction opposite the drive motor (MOT) and is rotatably supported by a hub bearing (22) co-axially with a transmission input shaft (30);a pump drive shaft (40) is co-axially aligned with and spans an interior portion of the converter hub (12) and engages the interior portion of the converter hub (12) such that the pump drive shaft (40) is rotatably driven by the converter hub (12);a chain wheel (45) is rotatably fixed to an end of the pump drive shaft (40);an oil pump (49) of the automatic transmission (1) has a pump input shaft (48) and is aligned such that the pump input shaft (48) is parallel with the co-axially aligned converter hub (12), the pump drive shaft (40) and the transmission input shaft (30); anda chain (46) engages both the chain wheel (45) and the pump input shaft (48) such that the oil pump (49) is driven by rotation of the pump drive shaft (40).
Bauknecht Gert (Immenstaad DEX) Pfalz Rainer (Friedrichshafen DEX) Bucksch Manfred (Friedrichshafen DEX), Pump drive for a motor vehicle automatic transmission.
Haupt, Josef; Roegner, Horst, Arrangement for lube oil supply a chain drive driving a transmission oil pump arranged offset the axis of a torque converter.
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