JPH0155353B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a damper device for a direct coupling clutch built into a torque converter.

As a conventional device of this kind, US Pat.
and an input case e on the other side that connects the pump c to the input shaft d, an output shaft g is connected via an inner circumferential hub f, and between the turbine b and the input case e, the A clutch plate h that is frictionally engaged with the input case e is provided so as to be movable in the axial direction, and the clutch plate h and the turbine b are connected to each other through an elastic piece i so that they can rotate relative to each other. A device is described in which, when the input case e and the turbine b are directly connected by pressing the input case e into contact with the input case e, the elastic piece i absorbs torque fluctuations.

However, in this case, an elastic piece i is arranged in the axial direction between a clutch plate h and a turbine b, and one end of the elastic piece i is connected to the turbine b, and the other end is inserted and locked to the clutch plate h. The elastic piece i
Due to the deflection in the circumferential direction, the reaction force acting on the clutch plate h has an axial component as shown in the second figure, and the pressing force of the clutch plate g changes, causing the engagement of the clutch depending on the magnitude of the torque. This has the disadvantage that the release characteristic fluctuates and vibrations are more likely to occur. Furthermore, in this case, the effective length of the elastic piece i is limited by the axial distance between the turbine b and the clutch plate h and is relatively short, and the spring constant of the elastic piece i increases, allowing smooth absorption of torque fluctuations. This has the disadvantage that it is difficult to obtain the desired characteristics.

In addition, as a damper device for a general dry type single plate clutch, USP 3218828 specification and USP 3375911
The specification describes a system in which a rod-shaped elastic piece extending radially outward is protruded from the inner hub, and the hub and an annular clutch plate on the outer periphery of the hub are relatively rotatably connected via the elastic piece. It is also possible to use this as a damper device for a torque converter direct-coupled clutch, but in this case, the elastic piece is formed on the inner periphery of the friction surface of the clutch plate at the bent part in the axial direction. The clutch plate is inserted through and locked into the flange plate, and the bending of the bent portion acts on the clutch plate in the axial direction, and the radial length of the elastic piece is limited, making it similar to the conventional type described above. causing inconvenience.

It is an object of the present invention to provide a device that eliminates such inconveniences, and is aimed at providing a device between a turbine connected to an output shaft inside a torque converter main body and an input case connected to an input shaft outside the torque converter main body. A clutch plate that is frictionally engaged with the input case is provided so as to be movable in the axial direction, and the clutch plate and the turbine are connected to each other so as to be rotatable relative to each other via an elastic piece provided on the turbine,
A bent edge on the outer periphery is formed on the clutch plate, and the elastic piece is provided to protrude radially outward from the hub of the turbine so as to be connected to the bent edge at a free end. It is characterized by being formed into a rod shape or a plate shape.

Next, one example of implementing the present invention will be explained with reference to FIGS. 3 to 5.

In the drawings, reference numeral 1 indicates a torque converter main body, and the main body 1 includes an input shaft 2 connected to the engine and an output shaft 3 connected to the transmission, both on the same axis at the front and rear. a rear pump 5 connected via an input case 4, and a turbine 7 connected to the output shaft 3 via an inner peripheral hub 6 in the middle thereof.
and a stator 8 between the pump 5 and the turbine 7, and according to the rotation of the input shaft 2, these three
The internal fluid is circulated through the output shaft 3.
Further, a clutch plate 9 is disposed between the input case 4 and the turbine 7 so as to be rotatably and slidably supported on the output shaft 3, The clutch plate 9 and the turbine 7 are connected via an elastic piece 10 so as to be able to rotate relative to each other.

The clutch plate 9 reduces the hydraulic pressure in the gap with the input case 4 on the front side thereof, for example in a high speed ratio region, by a hydraulic control device (not shown) connected to the gap through the shaft hole 3a of the output shaft 3. The clutch is moved forward toward the input case 4 side, and is frictionally engaged with the input case 4 at the friction surface 9a on the front outer periphery of the clutch. are directly connected via the clutch plate 9 and the elastic piece 10, thereby compensating for the reduction in power transmission efficiency due to the circulation of the internal fluid.

The above is not particularly different from the conventional one described above, but
According to the present invention, the clutch plate 9 is formed with a bent edge 11 on the outer periphery bent toward the turbine 7 side, that is, toward the rear, and the elastic piece 10 is provided to protrude radially outward from the hub 6 so that the outer end thereof It was connected to the bent edge 11.

The elastic piece 10 may be in the form of a plate having a width in the axial direction, that is, in the front-rear direction, but in the illustrated example, it is in the form of a rod to reduce the axial length of the torque converter as much as possible. Also, there is a fifth on the bent edge 11.
As clearly shown in the figure, a locking groove 12 extending in the axial direction is formed, and the outer end of the elastic piece 10 is inserted into the locking groove 12 to connect the outer end to the bent edge 11 so as to be movable in the axial direction. This prevents unnecessary bending stress from acting on the elastic piece 10 due to the axial movement of the clutch plate 9.

In addition, in the illustrated example, the elastic piece 10 has a radial groove 6a on the front end surface of the hub 6 and a groove 6b on the inner end thereof.
and was inserted and fixed into this at the L-shaped bent portion of the inner end of the elastic piece 10.

Note that if unlimited relative rotation between the turbine 7 and the clutch plate 9 is allowed, there is a risk that the elastic piece 10 will bend too much and its outer end will come off the locking groove 12. As clearly shown in FIG. 5, a rack plate 14 is attached which engages the notch 13 at the rear end of the bent edge 11 with a predetermined angle of play, so as to prevent relative rotation beyond this angle of play. did.

Next, to explain its operation, when torque fluctuation occurs when the clutch plate 9 is pressed against the input case 4 and in the clutch engaged state, the relative relationship between the turbine 7 and the clutch plate 9 due to circumferential deflection of the elastic piece 10 is caused. This torque fluctuation is absorbed by rotation.

This is the same for the conventional method mentioned above, but
According to the present invention, since the elastic piece 10 is disposed in the radial direction between the hub 6 and the bent edge 11, the component of the reaction force acting on the clutch plate 9 due to the bending in the circumferential direction is Since only the radial component and the radial component act, the axial component does not act, and the pressing force of the clutch plate 9 remains constant regardless of torque fluctuations, resulting in stable clutch engagement and release characteristics and no vibration.

Furthermore, by arranging the elastic piece 10 as described above, its effective length becomes longer than that of the conventional type, and the spring constant is reduced, so that the relative rotation between the turbine 7 and the clutch plate 9 for a unit change in torque is reduced. The angular width increases and torque fluctuations are absorbed more smoothly.

As described above, according to the present invention, the clutch plate 9 installed between the turbine 7 and the input case 4 is formed with a bent edge 11 on the outer periphery bent toward the turbine 7 side, and the bent edge 11 is Since the elastic piece 10 is formed in the shape of a rod or plate that protrudes radially outward from the hub 6 of the turbine 7 so as to be connected at the free end, the rod-shaped or plate-shaped elastic piece 10 can be easily formed. In addition to improving its assemblability, the flexure of the clutch plate 9 does not generate an axial component in the reaction force acting on the clutch plate 9, and its effective length can be made sufficiently long.

[Brief explanation of drawings]

Fig. 1 is a line diagram of a conventional device, Fig. 2 is a cut-away plan view of its main parts, Fig. 3 is a cut-away side view of an example of the device of the present invention, and Fig. 4 is a - line plan view of Fig. 3. , 5th
The figure is a sectional view taken along the line -- in FIG. 4. 1...Torque converter body, 2...Input shaft,
3... Output shaft, 4... Input case, 5... Pump, 6... Hub, 7... Turbine, 9... Clutch plate, 10... Elastic piece, 11... Bent edge, 12...
...Latching groove.

Claims (1)

[Claims] 1. A clutch plate that is frictionally engaged with the input case is provided between the turbine connected to the output shaft inside the torque converter main body and the input case connected to the input shaft outside the torque converter main body. In a device that is provided movably in the axial direction and connects the clutch plate and the turbine so that they can rotate relative to each other via an elastic piece provided on the turbine, the clutch plate has an outer circumferential fold that is bent toward the turbine side. A torque converter direct connection, characterized in that a curved edge is formed, and the elastic piece is formed in the shape of a rod or plate protruding radially outward from the hub of the turbine so as to be connected to the bent edge at a free end. Clutch damper device. 2. The torque converter direct coupling clutch according to claim 1, wherein a locking groove extending in the axial direction is formed in the bent edge, and the free end of the elastic piece is inserted into the locking groove. damper device.