Planetary gear
AssigneeZF Friedrichshafen AG
InventorHarald Eckert
Life of this patent
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Abstract
A planetary transmission which has a drive shaft, an axial bearing, an internal gear, an axially displaceable sliding collar and a lubrication circuit and an output shaft which is mounted the transmission housing by an external bearing and an internal bearing. The housing is provided with an oil intake (13) which is connected to an oil line (16) with the external bearing (5) of the output shaft, which is linked by an oil feeding circuit with the axial bearing (9) of the output shaft. The axial bearing (9) is connected with an interior gear bearing by an interior gear (17), the interior gear (17) is encapsulated through a wall section (18). An oil discharge (14) is connected with an oil pump located outside the planetary transmission which, on the other hand, is connected with the oil intake (13).
Claims9
A planetary transmission for machine tools, the planetary transmission comprising:
- a drive shaft that is connected to a sun gear;
- an output shaft connected to a planetary carrier and mounted over a transmission housing by an external bearing and an internal bearing, both of the external bearing and the internal bearing being separated from one another by a piston ring;
- an axial bearing;
- an interior gear which rotates over an interior gear bearing and is located in the transmission housing,
- an axially displaceable sliding collar;
- and
- a lubrication circuit in the transmission;
- the housing being provided with an oil intake (13) that is connected to an oil pump located outside the transmission, the oil intake (13) supplies an oil flow over an oil line (16) to the external bearing (5) of the output shaft (3), the piston ring (8) is located between the external bearing (5) and the internal bearing (6), the oil intake (13) serves as an oil passage, in which the external bearing (5) is connected through an oil feeding circuit with the axial bearing (9), and the axial bearing (9) is connected with a cavity (17) in the interior gear bearing (11), the cavity (17) is encapsulated through a wall section (18) of the transmission housing to an existing oil discharge (14).
Dependencies are inferred from the claim text.