Hydrodynamic clutch device

Abstract

A hydrodynamic clutch includes a housing which can be brought into working connection with a drive; a hydrodynamic circuit formed by a pump wheel and a turbine wheel; a torsional vibration damper having a drive side transmission element, a takeoff side transmission element, and at least one energy storage group between the transmission elements; and a bridging clutch including first friction elements connected to the housing and second friction elements connected to the drive side transmission element. A first flow route extends from a first flow passage to the friction elements, and a second flow route extends from the hydrodynamic circuit to a second flow passage. A sealing arrangement cooperates with the drive side transmission element to separate the first flow route from the second flow route.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 shows the upper half of a longitudinal cross section through a hydrodynamic clutch arrangement with a bridging clutch and a torsional vibration damper with two energy-storage groups, where a sealing arrangement with an axial gap seal against a drive-side transmission element of the torsional vibration damper is assigned to the takeoff-side energy-storage group;

FIG. 2 is similar to FIG. 1 except that it shows the routes taken by the medium;

FIG. 3 shows a detailed view, in isolation, of a takeoff-side friction element carrier of the bridging clutch, the carrier being assigned to the drive-side transmission element of the torsional vibration damper shown in FIG. 1, except that, in contrast to the embodiment in FIG. 1, the carrier has a collar between a radial area and a set of teeth which are free of interruption in the circumferential direction;

FIG. 4 is similar to FIG. 3 except that it shows a set of teeth formed in the circumferential direction by notches;

FIG. 5 is similar to FIG. 1, except that it shows a radial gap seal against the drive-side transmission element of the torsional vibration damper;

FIG. 6 is similar to FIG. 5, except that it shows a radial contact seal against the drive-side transmission element of the torsional vibration damper; and

FIG. 7 is similar to FIG. 6, except that it shows an axial contact seal against the drive-side transmission element of the torsional vibration damper.

Claims

1. A hydrodynamic clutch device comprising: a housing which can be brought into working connection with a drive;a hydrodynamic circuit formed by a pump wheel and a turbine wheel in said housing;a bridging clutch comprising a friction area in said housing;a torsional vibration damper comprising a drive side transmission element, a takeoff side transmission element, and at least one energy storage group between said transmission elements;a first flow route for a fluid medium extending from a first flow passage to said friction area;a second flow route for said fluid medium extending from said hydrodynamic circuit to a second flow passage; anda sealing arrangement separating said first flow route from said second flow route.

2. The hydrodynamic clutch device of claim 1 wherein the torsional vibration damper comprises a transmission element which can move relative to the drive side transmission element, the sealing arrangement being fixed to the transmission element which can move relative to the drive side transmission element and cooperating with the drive side transmission element to separate the first flow route from the second flow route.

3. The hydrodynamic clutch device of claim 1 wherein said bridging clutch comprises a plurality of first friction elements connected to said housing and fixed against rotation with respect to said housing, and a plurality of second friction elements connected to said drive side transmission element and fixed against rotation with respect to said drive side transmission element.

4. The hydrodynamic clutch device of claim 2 the at least one energy storage group comprises a drive side energy storage group fixed to the drive side transmission element, and a takeoff side energy storage group fixed to the takeoff side transmission element, said torsional vibration damper comprising an intermediate transmission element connecting said first and second energy storage groups, the sealing arrangement being fixed to the intermediate transmission element.

5. The hydrodynamic clutch device of claim 2 wherein the sealing arrangement comprises a radially outer area which is separated from the drive side transmission element by a sealing gap.

6. The hydrodynamic clutch device of claim 5 wherein said radially outer area approaches a radially oriented surface of said drive side transmission element axially to form an axial sealing gap.

7. The hydrodynamic clutch device of claim 5 wherein said radially outer area approaches an axially oriented surface of said drive side transmission element to form a radial sealing gap.

8. The hydrodynamic clutch device of claim 5 further comprising a contact sealing element in said gap.

9. The hydrodynamic clutch device of claim 1 wherein said first flow passage acts as a flow inlet for said fluid medium, and said second flow passage acts as a flow outlet for said fluid medium.

10. The hydrodynamic clutch device of claim 1 where said drive side transmission element is formed with flow passages which conduct fluid medium from said first flow route to said friction area.

11. The hydrodynamic clutch device of claim 10 wherein said bridging clutch comprises a plurality of friction elements having friction surfaces in said friction area, said passages directing said fluid medium toward the friction surfaces.

12. The hydrodynamic clutch device of claim 3 further wherein said drive side transmission element of said torsional vibration damper is formed with teeth which engage said second friction elements to prevent rotation while permitting axial movement.

13. The hydrodynamic clutch device of claim 12 wherein said teeth alternate with radial depressions, each adjacent pair of said teeth being connected to each other by a depression.

14. The hydrodynamic clutch device of claim 13 wherein each said tooth is formed with a flow passage which conducts fluid medium from said first flow route to said friction area.

15. The hydrodynamic clutch device of claim 12 wherein said teeth alternate with notches, each adjacent pair of said teeth being separated by a notch, said notches serving as flow passages which conduct fluid medium from said first flow route to said friction area.

16. The hydrodynamic clutch device of claim 9 wherein said first flow path is connected to said second flow path via said friction area, whereby said fluid medium flows from said inlet to said friction area to said hydrodynamic circuit to said outlet.