Hydrokinetic torque coupling device with turbine-piston lock-up clutch and epicyclic gearing

Patent metadata

Field	Value
Publication number	US-2016102746-A1
Application number	US-201414510267-A
Country	US
Kind code	A1
Filing date	Oct 9, 2014
Priority date	Oct 9, 2014
Publication date	Apr 14, 2016
Grant date	—

Abstract

A hydrokinetic torque coupling device for coupling together a driving shaft and a driven shaft. The torque coupling device includes a casing rotatable about a rotational axis and having a casing cover shell and an impeller shell, an impeller coaxial aligned with the rotational axis, a turbine-piston coaxially aligned with and drivable by the impeller and including a turbine-piston shell, a stator situated between the impeller and the turbine-piston, a torsional vibration damper configured to operatively connect the turbine-piston shell to an output hub having radially outer gear teeth, a rotatable damper hub drivenly connected to the torsional vibration damper and having radially inner gear teeth, a carrier configured to connect to a stationary stator shaft, and a planet gear rotatably supported by the carrier and meshing with the radially inner gear teeth of the damper hub and the radially outer gear teeth of the output hub.

First claim

What is claimed is:

1 . A hydrokinetic torque coupling device for coupling together a driving shaft and a driven shaft, the hydrokinetic torque coupling device comprising:
a casing rotatable about a rotational axis and having an interior volume, the casing comprising a casing cover shell and an impeller shell disposed axially opposite to and fixedly connected to the casing cover shell; an impeller coaxially aligned with the rotational axis and comprising the impeller shell; a turbine-piston coaxially aligned with and hydrodynamically drivable by the impeller and comprising a turbine-piston shell; a stator situated between the impeller and the turbine-piston; an output hub having radially outer gear teeth; a rotatable damper hub drivenly connected to the turbine-piston and having radially inner gear teeth; a carrier configured to connect to a stator shaft to prevent rotation of the carrier about the rotational axis of the casing; and a planet gear rotatably supported by the carrier, the planet gear meshing with the radially inner gear teeth of the damper hub and the radially outer gear teeth of the output hub.

2 . The hydrokinetic torque coupling device as defined in claim 1 , further comprising a carrier pin on which the planet gear is rotatably mounted, wherein the carrier pin is connected to the carrier and axially extends from the carrier to support the planet gear rotatably about the carrier pin.

3 . The hydrokinetic torque coupling device as defined in claim 2 , further comprising a one-way clutch operatively connected to the stator, wherein the one-way clutch comprises an outer ring secured to and non-rotatable relative to the stator and an inner ring coaxial to the rotational axis.

4 . The hydrokinetic torque coupling device as defined in claim 3 , further comprising an input shaft support non-rotatably connected to the carrier by the carrier pin axially extending between the carrier and the input shaft support.

5 . The hydrokinetic torque coupling device as defined in claim 4 , wherein the input shaft support is non-rotatably coupled to the inner ring of the one-way clutch.

6 . The hydrokinetic torque coupling device as defined in claim 4 , wherein the input shaft support is integrally formed with the inner ring of the one-way clutch.

7 . The hydrokinetic torque coupling device as defined in claim 1 , wherein the planet gear meshing with the radially inner gear teeth of the damper hub and the radially outer gear teeth of the output hub comprises first and second planet gears coupled to the carrier and rotatable about longitudinal axes of the planet gears, wherein the first planet gear meshes with the damper hub and the second planet gear, and wherein the second planet gear meshes with the first planet gear and the output hub.

8 . The hydrokinetic torque coupling device as defined in claim 7 , wherein the first planet gear is rotatably mounted on a first carrier pin, wherein the second planet gear is rotatably mounted on a second carrier pin, and wherein the first and second carrier pins are connected to the carrier and axially extend from the carrier to support the first and second planet gears rotatably about the first and second carrier pins.

9 . The hydrokinetic torque coupling device as defined in claim 1 , wherein an internal radius of the output hub is less than an internal radius of the carrier.

10 . The hydrokinetic torque coupling device of claim 1 , further comprising a torsional vibration damper drivingly connecting the turbine-piston shell to the damper hub.

11 . The hydrokinetic torque coupling device of claim 10 , further comprising a drive member non-movably connected to the turbine-piston shell, wherein the torsional vibration damper comprises a driven member connected to and non-rotatable relative to the damper hub, and a plurality of circumferential elastic damping members drivingly coupling the drive member to the driven member.

12 . The hydrokinetic torque coupling device of claim 10 , wherein the turbine-piston shell partitions the interior volume of the casing into a torus chamber and a damper chamber, wherein the torus chamber contains impeller blades of the impeller and turbine blades of the turbine-piston, and wherein the damper chamber contains the torsional vibration damper.

13 . The hydrokinetic torque coupling device of claim 10 , further comprising a drive member non-movably connected to the turbine-piston shell, wherein the torsional vibration damper comprises an intermediate member, a first set of circumferentially extending elastic damping members drivingly coupling the drive member to the intermediate member, a driven member connected to and non-rotatable relative to the damper hub, a second set of circumferentially extending elastic damping members drivingly coupling the intermediate member to the driven member, and a centrifugal pendulum oscillator mounted to the intermediate member.

14 . The hydrokinetic torque coupling device of claim 10 , further comprising a drive member non-movably connected to the turbine-piston shell, wherein the torsional vibration damper comprises an intermediate member, a first set of circumferentially extending elastic damping members drivingly coupling the drive member to the intermediate member, a driven member connected to and non-rotatable relative to the damper hub, a second set of circumferentially extending elastic damping members drivingly coupling the intermediate member to the driven member, and a spring mass system coupled to the intermediate member.

15 . The hydrokinetic torque coupling device of claim 1 , wherein the impeller shell comprises a piston engagement portion having a first engagement surface, wherein the turbine-piston shell comprises a turbine-piston flange and partitions the interior volume of the casing into a first chamber between the impeller shell and the turbine-piston shell and a second chamber between the turbine-piston shell and the casing shell, and wherein the turbine-piston flange has a second engagement surface facing the first engagement surface and movable axially toward and away from the first engagement surface to position the hydrokinetic torque coupling device into and out of a lockup mode in which the first and second engagement surfaces are frictionally, non-rotatably coupled to one another to mechanically lock the turbine-piston to the piston engagement portion.

16 . The hydrokinetic torque coupling device of claim 15 , wherein the turbine-piston shell and the turbine-piston flange are axially movable towards an input side of the hydrokinetic torque coupling device in order to frictionally couple the first and second engagement surfaces and position the turbine-piston in the lockup mode, and wherein the turbine-piston shell and the turbine-piston flange are axially movable towards an output side of the hydrokinetic torque coupling device so that the first and second engagement surfaces are not frictionally coupled when the turbine-piston is out of the lockup mode.

17 . The hydrokinetic torque coupling device of claim 13 , wherein the piston engagement portion extends radially outwardly.

18 . The hydrokinetic torque coupling device of claim 15 , wherein the first engagement surface or the second engagement surface comprises a frictional lining.

19 . A method of assembling a hydrokinetic torque coupling device for coupling a driving shaft and a driven shaft together, the method comprising the steps of:
providing a torque converter coaxially aligned with and rotatable about a rotational axis, the

Assignees

• Valeo Embrayages

Inventors

• Depraete Alexandre
• Kozak Eugene

Classifications

• F16H2045/0205

  two chamber system, i.e. without a separated, closed chamber specially adapted for actuating a lock-up clutch · CPC title

• F16F15/145

  Masses mounted with play with respect to driving means thus enabling free movement over a limited range · CPC title

• F16H2045/0278

  comprising only two co-acting friction surfaces · CPC title

• F16F15/1206

  with a planetary gear system · CPC title

• F16H45/02

  with mechanical clutches for bridging a fluid gearing of the hydrokinetic type (control of torque converter lock-up clutches F16H61/14) · CPC title