Drive device for a diaphragm wall cutter
AssigneeLiebherr-Components Biberach GmbH
InventorsRoland Widmann, Johannes Halder, Stefan Duelli
Life of this patent
Estimating the term…
Abstract
The invention relates to a drive device for a diaphragm wall cutter, with a hydraulic motor, a gear unit, to which at least one cutting wheel of the diaphragm wall cutter can be connected on the output side, and a drive shaft which connects the hydraulic motor to the gear unit, wherein the drive shaft is mounted by way of at least one drive shaft bearing which is arranged between the hydraulic motor and the gear unit, wherein the drive shaft bearing has a lubricant feed line which is connected to a leakage discharge line of the hydraulic motor and/or to the hydraulic circuit in order to operate the hydraulic motor, and is configured to lubricate the drive shaft bearing with hydraulic oil.
Claims18
A drive device for a diaphragm wall cutter having at least one cutting wheel comprising:
- a hydraulic motor;
- a gear unit configured to connect on the output side to at least one cutting wheel of the diaphragm wall cutter;
- a motor shaft;
- and
- a drive shaft connecting the hydraulic motor to the gear unit, wherein the drive shaft is mounted by a drive shaft bearing which is between the hydraulic motor and the gear unit, wherein the drive shaft bearing has a lubricant feed line connected to a leakage discharge line of the hydraulic motor, wherein the lubricant feed line is configured to lubricate the drive shaft bearing with lubricant,
- wherein the lubricant feed line has a leakage collecting inlet for lubricating the drive shaft, wherein the leakage collecting inlet is connected to the hydraulic motor and is configured to be fed by oil leakage from the hydraulic motor, wherein the leakage collecting inlet engages around and/or under the motor shaft and/or the outlet of the motor shaft, and
- wherein the hydraulic motor is formed free of shaft seals at the outlet of the motor shaft from a motor housing so that the oil leakage from the hydraulic motor lubricates the drive shaft bearing via the leakage collecting inlet.
Dependencies are inferred from the claim text.