Hydrokinetic torque coupling device for motor vehicle
A hydrokinetic torque coupling device comprising an impeller wheel ( 2 ) able to hydrokinetically drive a turbine wheel ( 3 ) into rotation, with the impeller wheel ( 2 ) being rotationally coupled to a cover ( 5 ), with the turbine wheel ( 3 ) being able to be axially moved between an engaged position and a disengaged position, wherein it comprises an elastically deformable stress overtaking member ( 25 ) axially inserted between the turbine wheel ( 3 ) and a part ( 12 ) of the cover ( 5 ), with the stress overtaking member ( 25 ) being able to limit the axial displacement of the turbine wheel ( 3 ) towards the above-mentioned part ( 12 ) of the cover ( 5 ), opposite the turbine wheel ( 3 ).
1. A hydrokinetic torque coupling device ( 1 ) for a motor vehicle, the hydrokinetic torque coupling device ( 1 ) comprising:
an impeller wheel ( 2 ) intended to be coupled to a crankshaft;
a turbine wheel ( 3 ) hydrokinetically driven by the impeller wheel ( 2 );
a cover non-rotatably coupled to the impeller wheel ( 2 ); and
an elastically deformable member ( 25 ) disposed axially between the turbine wheel ( 3 ) and a part ( 12 ) of the cover ( 5 ), the elastically deformable member ( 25 ) comprising an elastomeric part ( 26 ) made of an elastomer;
the cover ( 5 ) accommodating, at least partially, the turbine wheel ( 3 ) and a reactor ( 4 );
the turbine wheel ( 3 ) being axially moveable between an engaged position in which the turbine wheel ( 3 ) and the impeller wheel ( 2 ) are non-rotatably coupled together, and a disengaged position in which the turbine wheel ( 3 ) and the impeller wheel ( 2 ) are rotationally uncoupled;
the elastically deformable member ( 25 ) configured to limit the axial displacement of the turbine wheel ( 3 ) towards the part ( 12 ) of the cover ( 5 ), opposite the turbine wheel ( 3 ).
2. The hydrokinetic torque coupling device ( 1 ) according to claim 1 , further comprising a hub ( 8 ) configured to be coupled to a transmission input shaft, wherein the elastically deformable member ( 25 ) is disposed axially between the turbine wheel ( 3 ) and the hub ( 8 ) or between the hub ( 8 ) and the cover ( 5 ).
3. A hydrokinetic torque coupling device ( 1 ) for a motor vehicle, the hydrokinetic torque coupling device ( 1 ) comprising:
an impeller wheel ( 2 ) intended to be coupled to a crankshaft;
a turbine wheel ( 3 ) hydrokinetically driven by the impeller wheel ( 2 );
a cover non-rotatably coupled to the impeller wheel ( 2 ); and
an elastically deformable member ( 25 ) disposed axially between the turbine wheel ( 3 ) and a part ( 12 ) of the cover ( 5 );
the cover ( 5 ) accommodating, at least partially, the turbine wheel ( 3 ) and a reactor ( 4 );
the turbine wheel ( 3 ) being axially moveable between an engaged position in which the turbine wheel ( 3 ) and the impeller wheel ( 2 ) are non-rotatably coupled together, and a disengaged position in which the turbine wheel ( 3 ) and the impeller wheel ( 2 ) are rotationally uncoupled;
the elastically deformable ( 25 ) configured to limit the axial displacement of the turbine wheel ( 3 ) towards the part ( 12 ) of the cover ( 5 ), opposite the turbine wheel ( 3 );
the elastically deformable member ( 25 ) comprising a central deformable part ( 26 ) made of an elastically deformable material, and two side parts ( 27 , 28 ) axially positioned on either side of the central deformable part ( 26 ), and wherein the parts ( 26 , 27 , 28 ) of the elastically deformable member ( 25 ) being drivingly coupled together.
4. The hydrokinetic torque coupling device ( 1 ) according to claim 3 , wherein the central deformable part ( 26 ) and the side parts ( 27 , 28 ) have an annular shape, with at least one of the side parts ( 27 , 28 ) and the central deformable part ( 26 ) each comprising at least one annular protruding or respectively recessed zone ( 26 b , 27 b ), embedded, in a form-fitting manner, in an annular protruding or respectively recessed zone ( 27 b , 26 b ) of the other part ( 26 , 27 ).
5. The hydrokinetic torque coupling device ( 1 ) according to claim 2 , wherein one of the hub ( 8 ), the turbine wheel ( 3 ) and the cover ( 5 ) comprises a coupling lug ( 31 ) configured to be engaged into an opening or a notch ( 30 ) in the elastically deformable member ( 25 ) so as to rotationally drivingly couple the elastically deformable member ( 25 ), and one of the hub ( 8 ), the turbine wheel ( 3 ) and the cover ( 5 ).
6. The hydrokinetic torque coupling device ( 1 ) according to claim 2 , further comprising a damping device ( 18 ) mounted between the turbine wheel ( 3 ) and the hub ( 8 ).
7. The hydrokinetic torque coupling device ( 1 ) according to claim 6 , wherein the damping device ( 18 ) comprise an annular wheel disc ( 9 ) connected to the hub ( 8 ) and at least one guiding washer ( 19 , 20 ) connected to the turbine wheel ( 3 ), with at least a first circumferentially acting elastic member ( 21 ) being mounted between the annular wheel disc ( 9 ) and the guiding washer ( 19 , 20 ), with the first elastic member ( 21 ) being able to oppose the relative rotation of the annular wheel disc ( 9 ) relative to the guiding washer ( 19 , 20 ).
8. The hydrokinetic torque coupling device ( 1 ) according to claim 7 , wherein the damping device ( 18 ) comprise at least a second elastic member ( 22 ) mounted between the guiding washer ( 19 , 20 ) and the turbine wheel ( 3 ), with the second elastic member ( 22 ) being able to oppose the relative rotation of the turbine wheel ( 3 ) relative to the guiding washer ( 19 , 20 ).
9. A hydrokinetic torque coupling device ( 1 ) for a motor vehicle, the hydrokinetic torque coupling device ( 1 ) comprising:
an impeller wheel ( 2 ) intended to be coupled to a crankshaft;
a turbine wheel ( 3 ) hydrokinetically driven by the impeller wheel ( 2 );
a cover non-rotatably coupled to the impeller wheel ( 2 );
an elastically deformable member ( 25 ) disposed axially between the turbine wheel ( 3 ) and a part ( 12 ) of the cover ( 5 ); and
a hub ( 8 ) adapted to be coupled to a transmission input shaft;
the cover ( 5 ) accommodating, at least partially, the turbine wheel ( 3 ) and a reactor ( 4 );
the turbine wheel ( 3 ) being axially moveable between an engaged position in which the turbine wheel ( 3 ) and the impeller wheel ( 2 ) are non-rotatably coupled together, and a disengaged position in which the turbine wheel ( 3 ) and the impeller wheel ( 2 ) are rotationally uncoupled;
the elastically deformable member ( 25 ) configured to limit the axial displacement of the turbine wheel ( 3 ) towards the part ( 12 ) of the cover ( 5 ), opposite the turbine wheel ( 3 );
the elastically deformable member ( 25 ) comprising an elastomeric part ( 26 ) and being disposed axially between the turbine wheel ( 3 ) and the hub ( 8 ) or between the hub ( 8 ) and the cover ( 5 ).
10. The hydrokinetic torque coupling device ( 1 ) according to claim 1 , wherein the elastically deformable member ( 25 ) comprises a central deformable part ( 26 ) in the form of the elastomeric part ( 26 ), and two side parts ( 27 , 28 ) axially positioned on either side of the central deformable part ( 26 ), and wherein the parts ( 26 , 27 , 28 ) of the elastically deformable member ( 25 ) are rotationally drivingly coupled together.
11. The hydrokinetic torque coupling device ( 1 ) according to claim 2 , wherein the elastically deformable member ( 25 ) comprises a central deformable part ( 26 ) in the form of the elastomeric part ( 26 ), and two side parts ( 27 , 28 ) axially positioned on either side of the central deformable part ( 26 ), and wherein the parts ( 26 , 27 , 28 ) of the elastically deformable member ( 25 ) being rotationally drivingly coupled together.
12. The hydrokinetic torque coupling device ( 1 ) according to claim 3 , wherein one of the hub ( 8 ), the turbine wheel ( 3 ) and the cover ( 5 ) comprises a coupling lug ( 31 ) configured to be engaged into an opening or a notch ( 30 ) in the elastically deformable member ( 25 ) so as to rotationally drivingly couple the elastically deformable member ( 25 ), and one of the hub ( 8 ), the turbine wheel ( 3 ) and the cover ( 5 ).
13. The hydrokinetic torque coupling device ( 1 ) according to claim 4 , wherein one of the hub ( 8 ), the turbine wheel ( 3 ) and the cover ( 5 ) comprises a coupling lug ( 31 ) configured to be engaged into an opening or a notch ( 30 ) in the elastically deformable member ( 25 ) so as to rotationally drivingly couple the elastically deformable member ( 25 ), and one of the hub ( 8 ), the turbine wheel ( 3 ) and the cover ( 5 ).
14. The hydrokinetic torque coupling device ( 1 ) according to claim 3 , comprising a damping device ( 18 ) mounted between the turbine wheel ( 3 ) and the hub ( 8 ).
15. The hydrokinetic torque coupling device ( 1 ) according to claim 4 , comprising a damping device ( 18 ) mounted between the turbine wheel ( 3 ) and the hub ( 8 ).
16. The hydrokinetic torque coupling device ( 1 ) according to claim 5 , comprising a damping device ( 18 ) mounted between the turbine wheel ( 3 ) and the hub ( 8 ).