JPS6151186B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Field of Industrial Application> The present invention relates to a direct coupling clutch mechanism for a torque converter.

<Prior art> Conventionally, the direct coupling clutch mechanism of a torque converter was provided between the front cover and the turbine outside the fluid circulation path of the torque converter.
The axial dimension was expanded, which was disadvantageous when mounted on a vehicle.

Therefore, by arranging the direct coupling clutch mechanism in the space between the impeller core and the turbine core, which was conventionally a dead space, the increase in volume due to the installation of the direct coupling clutch mechanism is minimized, making the torque converter easier to mount on vehicles. A direct coupling clutch mechanism has been proposed.

<Problems to be Solved by the Invention> By the way, when the direct coupling clutch mechanism of the torque converter is engaged and the engine and the transmission are directly connected mechanically, torsional vibration from the engine is directly transmitted to the transmission. or cause an unpleasant shock to the driver.

Conventionally, in the case where the direct coupling clutch mechanism of the torque converter was installed between the front cover and the turbine outside the fluid circulation path of the torque converter, a damper mechanism was installed outside the fluid circulation path of the torque converter to absorb torsional vibration. However, in this case, the axial dimension increased, which was disadvantageous for mounting on a vehicle.

Further, in those in which the direct coupling clutch mechanism is disposed in the space between the impeller core and the turbine core, a damper mechanism is not provided because the space is interposed.

Furthermore, with conventional damper mechanisms, when an impact load exceeding the set torque outside the damper mechanism's operating range is applied, the impact load is transmitted to the transmission system after the output shaft of the torque converter, causing an unpleasant shock. Ta.

Therefore, the present invention disposes both a direct coupling clutch mechanism and a damper mechanism in a small space between the impeller core and the turbine core, thereby suppressing the increase in axial dimension due to the installation of the direct coupling clutch mechanism, and by installing the damper mechanism. This system absorbs torsional vibrations from the engine and prevents them from being directly transmitted to the transmission, thereby preventing them from adversely affecting the transmission or causing an unpleasant shock to the driver.

Furthermore, the present invention prevents unpleasant shocks by not transmitting the impact load to the transmission system after the output shaft of the torque converter when an impact load exceeding a set torque outside the operating range of the damper mechanism is applied. It is.

<Means for solving the problems> The present invention provides an impeller element connected to an input shaft,
A torque converter comprising a turbine element fluidly connected to the impeller element to transmit power, and a stator element located between the turbine element and the impeller element to rectify fluid flowing therebetween;
A torque converter comprising a direct coupling clutch mechanism disposed between an impeller core and a turbine core forming an inner wall of an annular fluid circulation path of the impeller element and the turbine element, and detachably engaging the impeller element and the turbine element. In the direct coupling clutch mechanism, the direct coupling clutch mechanism has a driving element coupled to the impeller element, a driven element coupled to the turbine element, and a friction surface that engages with a friction surface provided on the driven element. a piston member connected to the drive element and slidable in the axial direction; a guide element that guides sliding of the piston member; a pressure chamber surrounded by the drive element and the piston member; and the pressure chamber. a spring member disposed between the piston member and the guide element and urging the piston member to a non-engaged position; and a damper member provided within the pressure chamber. The damper member includes an outer cylinder connected to the impeller core and having a damping orifice, a sleeve member slidably disposed within the outer cylinder, and the sleeve member connected to the piston member. It is comprised of an indenter member that presses in the axial direction, and a spring member that is disposed within the sleeve member and controls the movement of the sleeve member relative to the outer cylinder.

<Example> Next, an example of the present invention will be described with reference to the drawings.
In FIG. 1, a hydraulic torque converter 1 includes an impeller element 2, a turbine element 3, and a stator element 4.
It consists of The impeller element 2 consists of an impeller shell 5, an impeller core 6, and blades 7. The impeller shell 5 is fixed to a front cover 10 having a pilot 8 and a connecting nut 9, and is connected to the output shaft of the engine. The turbine element 3 consists of a turbine outer shell 11, a turbine core 12, and blades 13, and the turbine outer shell 11 has a turbine hub 15 spline-fitted to an output shaft 14 of a torque converter.
are connected to each other by rivets 16. The stator element 4 consists of a stator body 17 and blades 18 and is connected to a fixed shaft 20 via a one-way clutch 19.

The direct coupling clutch 30 includes a driving element 31 connected to the impeller core 6, a driven element 32 connected to the turbine core 12, a piston member 33 connected to the driving element 31, and a damper member 34 provided on the driving element 31. It is arranged between the impeller core 6 and the turbine core 12, which form the inner wall of the annular fluid circulation path of the impeller element and the turbine element.

The driving element 31 consists of a driving plate 35 fixed to the impeller core 6 and a driven plate 36 fixed to the piston member 33. The driving plate 35 is connected to the outer cylinder 37 of the damper member 34, and the driven plate 36 is connected to the damper member 34.
is connected to an indenter member 38 by a pin 39. The piston member 33 is disposed slidably in the axial direction on a guide element 41 held by a snap ring 40 on the impeller core 6, and has a friction surface 42 that engages with a friction surface of the driven element 32. A spring member 43 is disposed between the piston member 33 and the guide element 41 to urge the piston member 33 to a non-engaging position (to the right in the figure).

The driven element 32 includes a clutch 44 fixed to the turbine core 12 and a friction plate 45 fixed to the clutch 44 and engaged with the friction surface 42 of the piston member 33.

The damper member 34 provided on the drive element 31 is
As shown in FIG. 2, an outer cylinder 37, sleeve members 46, 46' slidably disposed within the outer cylinder 37,
A spring 47 fitted in the sleeve members 46, 46', and an indenter member 38 connected to the driven plate 36 and pressing the sleeve member 46 according to the driving torque.
It consists of A damping orifice 48 is formed in the center of the outer cylinder 37, and oil holes 49, 49' are formed at a predetermined distance from one end thereof. The sleeve members 46, 46' are provided with oil passages 51, 51' that communicate with the pressure chamber 50, and the oil passages 51, 51' extend to a portion that slides on the inner circumference of the outer cylinder 37. .

The pressure oil supply means includes an oil pump 61 that sucks oil from the oil reservoir 60, a switching valve 62 that controls ON/OFF of the direct coupling clutch mechanism, an oil passage 63 that guides the pressure oil from the switching valve 62 to the pressure chamber 50, and a fixed An oil passage 64 provided in the shaft 20, an oil passage 66 provided in the inner race 65 of the one-way clutch 19, and an oil passage 6 provided in the outer race 67 of the one-way clutch 65.
8. Oil passage 69 provided in stator body 17 and oil passage 70 provided in guide element 41, switching valve 6
2 into the impeller element 2 of the torque converter, and an oil path 72 that discharges the discharged pressure oil from the torque converter into the oil sump 60. A check valve 73 is provided in the oil passage 63, and a check valve 74 is provided in the oil passage 71. Further, a check valve 75 is provided in the oil passage 72.

Next, the operation of the direct coupling clutch mechanism of the present invention will be explained.

When the direct coupling clutch operates...When pressure oil is supplied to the oil passage 63 by the operation of the switching valve 62, the oil passages 64, 6
6, 68, 69, and 70 and are led to the pressure chamber 50. The pressure oil led to the pressure chamber 50 is transferred to the piston 3
3 to the left in the figure against the spring 43,
The friction surface 42 of the piston 33 and the friction plate 45 connected to the turbine core 12 of the driven element 32 engage with each other. In this case, the power from the output shaft of the engine is transmitted from the impeller core 6 to the drive plate 35 to the damper member 34 to the driven plate 36 to the piston member 33 to the friction plate 45 to the clutch 44 to the turbine core 1.
2-turbine element 3-transmitted mechanically via the turbine hub 15 to the output shaft 14 of the torque converter without fluids.

When the direct coupling clutch is in operation, shocks such as torsional vibrations of the engine can be absorbed by the operation of the damper member due to the sliding of the sleeve member 46 of the damper, and are not transmitted to the transmission provided after the output shaft of the torque converter.

Conventionally, in a direct coupling clutch mechanism having this type of vibration damper, torsional vibrations below the set torque can be absorbed, but torsional vibrations cannot be absorbed when the set torque is exceeded, such as after the damper spring is in close contact with the torque. An impact load was being applied to the transmission system installed after the output shaft of the converter.

In the present invention, the outer cylinder 37 of the damper member includes an oil passage 49 for discharging the pressure oil in the pressure chamber 50 of the piston into the impeller element when the torque exceeds a predetermined value.
49', the direct coupling clutch is released when the torque exceeds a predetermined value and enters the converter state, thus eliminating the above-mentioned drawbacks of the prior art.

When the engine is driven, damper springs 47 are installed on the impeller side and turbine side due to the driving torque.
A certain torsional angular displacement occurs that balances the strength of the damper orifice 48 and the discharge resistance of the damper orifice 48. When a large driving torque is applied, the sleeve member 46 moves significantly to the right in the figure, and the torsional angular displacement exceeds the value a1 shown in FIG. Pressure oil for the oil passage 51,
49, the oil is discharged into the impeller element through the oil passage 52 provided in the impeller core 6, and the piston member 3
3 is moved to the right in the figure by the return spring 43, and the engagement with the friction plate 45 is released, thereby releasing the direct coupling clutch.

Similarly, during engine braking, when the torsional angular displacement exceeds the value a2 shown in FIG. 2, the direct coupling clutch is released.

In this manner, when a large driving force is generated when the direct coupling clutch is operated, the direct coupling clutch is automatically released and converter drive is realized.

When the direct coupling clutch is released... When pressure oil is supplied to the oil passage 71 by the operation of the switching valve 62, the pressure oil in the oil passage 71 circulates within the torque converter and is discharged from the oil passage 72. In this case, since pressure oil is not supplied to the pressure chamber 50, the direct coupling clutch is released and the torque converter is in the converter driving state.

<Effects of the Invention> As described above, the present invention provides a direct-coupled clutch mechanism for a torque converter, in which a direct-coupled clutch mechanism having a damper member forms the inner wall of an annular fluid circulation path of an impeller element and a turbine element of a torque converter. By disposing it between the impeller core and the turbine core, it is possible to suppress the increase in axial dimension due to the installation of the direct coupling clutch mechanism, and by installing the damper mechanism, the torsional vibration from the engine is absorbed by the damper mechanism. This has the effect of preventing torsional vibration from being directly transmitted to the transmission, thereby preventing it from having an adverse effect on the transmission or causing an unpleasant shock to the driver.

Further, the damper member is connected to the impeller core and includes an outer cylinder having a damping orifice, a sleeve member slidably disposed within the outer cylinder, and an indenter connected to the piston member and pressing the sleeve member in the axial direction. and a spring member disposed within the sleeve member to control relative movement of the sleeve member with respect to the outer cylinder, and the sleeve member has an oil passage communicating with the pressure chamber located on the inner periphery of the outer cylinder. an oil hole is provided in the outer cylinder at a position a predetermined distance from one end thereof, and when the sleeve member moves a predetermined distance, the oil passage and the oil hole Since the pressure chamber is configured to communicate with the impeller element or the turbine element, when an impact load exceeding a set torque outside the operating range of the damper mechanism acts,
The pressure oil in the pressure chamber is discharged into the impeller element through the oil passage, the direct coupling clutch mechanism is released, and the torque converter enters the converter state, so that the impact load is no longer transmitted to the transmission system after the output shaft of the torque converter. This has the effect of preventing unpleasant shots.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a torque converter to which the direct coupling clutch mechanism of the present invention is applied, and FIG. 2 is a diagram showing a damper member of the direct coupling clutch mechanism of the present invention. Explanation of symbols, 1...Torque converter, 2...
Impeller element, 3... Turbine element, 4... Stator element, 6... Impeller core, 12... Turbine core, 30... Direct coupling clutch mechanism, 31... Drive element, 32... Driven element, 33... Piston member , 34... Damper member, 35... Drive plate, 36
... Driven plate, 37 ... Outer cylinder, 38 ... Indenter member,
41... Guide member, 42... Friction surface, 43...
Spring, 44... Clasp, 45...
Friction plate, 46... Sleeve member, 47... Damper spring, 48... Damping orifice, 4
9,49'...Oil hole, 50...Pressure chamber, 51,5
1'...Oil road.

Claims (1)

[Scope of Claims] 1. An impeller element connected to an input shaft, a turbine element fluidly connected to the impeller element to transmit power, and a fluid flowing between the turbine element and the impeller element. A torque converter consisting of a stator element that performs flow rectification, and an impeller core and a turbine core that form the inner walls of the annular fluid circulation path of the impeller element and the turbine element, and the impeller element and the turbine element are detachably connected to each other. In the direct-coupled clutch mechanism of a torque converter, the direct-coupled clutch mechanism includes a drive element coupled to the impeller element, a driven element coupled to the turbine element, and a drive element connected to the driven element. a piston member that has a friction surface that engages with the friction surface that is connected to the drive element and is slidable in the axial direction; a guide element that guides the sliding movement of the piston member; and a guide element that guides the sliding movement of the piston member; A pressure chamber surrounded by
a pressure oil supply means for supplying pressure oil to the pressure chamber; a spring member disposed between the piston member and the guide element to urge the piston member to a non-engaged position; and a spring member provided within the pressure chamber. a damper member, the damper member comprising: an outer cylinder connected to the impeller core and having a damping orifice; a sleeve member slidably disposed within the outer cylinder;
The indenter member is connected to the piston member and presses the sleeve member in the axial direction, and the spring member is disposed within the sleeve member and controls relative movement of the sleeve member with respect to the outer cylinder. A direct coupling clutch mechanism for a torque converter characterized by the following. 2 The sleeve member is provided with an oil passage that communicates with the pressure chamber and extends to a portion that slides on the inner circumference of the outer cylinder, and the outer cylinder has an oil passage located a predetermined distance from one end thereof. A claim characterized in that a hole is provided so that when the sleeve member moves by a predetermined dimension, the oil passage and the oil hole are connected to each other and the pressure chamber is connected to the inside of the impeller element or the turbine element. A direct coupling clutch mechanism for a torque converter according to item 1.