Hydrodynamic 2-speed hydraulic drive
AssigneeVoith Turbo GmbH & Co. KG
InventorsWolfgang Fischer, Hubert Schmölz
Life of this patent
Estimating the term…
Abstract
A hydrodynamic 2-speed turbine drive, in particular, a turbine drive for application in under-floor or low-floor drive systems on rail vehicles, with two hydrodynamic components for the formation of two tractive-work circuits for two different speed ranges. A first hydrodynamic component is in the form of a hydrodynamic speed/torque converter and a second hydrodynamic component is in the form of a hydrodynamic clutch. The converter and the clutch are arranged parallel to each other and with no, or very little, offset between drive input shaft and drive output shaft.
Claims20
A hydrodynamic 2-speed hydraulic drive for application in under-floor drive systems on rail vehicles with a low-floor part, comprising:
- a drive input shaft (11) and a drive output shaft (12);
- two hydrodynamic components for formation of two tractive-work circuits for two different speed ranges including a first hydrodynamic component in a form of a hydrodynamic speed-torque converter (3) and a second hydrodynamic component in a form of a hydrodynamic clutch (4);
- a step-up gear set coupled with the drive input shaft (11) for driving the hydrodynamic speed-torque converter (3) and the hydrodynamic clutch (4);
- the hydrodynamic speed-torque converter (3) being connected with the drive output shaft (12) by means of a reverse gear set (22);
- the hydrodynamic speed-torque converter (3) and the hydrodynamic clutch (4) being arranged parallel to each other and with generally no offset when considered in the axial direction between the drive input shaft (11) and the drive output shaft (12);
- the hydrodynamic speed-torque converter (3) comprising at least one pump wheel (5) locked with a first primary shaft (18) and one hydraulic wheel (6) locked with a first secondary shaft (20) and a guide wheel (7);
- the hydrodynamic clutch (4) comprising a pump wheel (8) locked with a second primary shaft (19) and a hydraulic wheel (9) locked with a second secondary shaft (21);
- a hydrodynamic brake mechanism in a form of a hydrodynamic retarder (35);
- the hydrodynamic retarder (35) arranged in a gearbox case (38) without changing the length of the case, that is without any influence on an axial location of a drive flange (45) coupled with the drive output shaft (12);
- the hydrodynamic clutch (4) being connected with the drive output shaft (12) by means of the reverse gear set (22);
- the secondary shafts (20, 21) connected with the reverse gear set (22), whereby the first secondary shaft (20) is connected by means of at least one connecting spur gear (25) with the reverse gear set (22) and the second secondary shaft is directly coupled with the reverse gear set (22);
- the hydrodynamic retarder in coaxial arrangement to the hydrodynamic speed-torque converter.
Dependencies are inferred from the claim text.