JP2000002313A - Torsional damper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a torsional damper for prolonging the length in the circumferential direction of a long hole to easily prolong the deflecting amplitude of a spring member, and displaying excellent vibration absorbing action. SOLUTION: This damper is provided with a nearly disklike hub 26, a pair of drive plates 27 oppositely arranged in both the sides of the hub 6, plural windows 28 and 29 formed in the positions corresponding to these hub 6 and plates 27 respectively, and spring member 30 housed in these plural windows 28 and 29 respectively and linking these hub 6 and plates 27 elastically and relative-turnably. Long holes 33 extended in a circumferential direction are formed on the hub 26 to provide connecting pins 36 for penetrating the long holes 33 to connect plates 27 with each other. The long holes 33 are formed on the outer side in a radius direction than the plural windows 28 of the hub 26.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lock-up clutch built in a torque converter of an automobile or the like.
The present invention relates to a torsional damper that can be applied to a clutch that controls torque transmission.

[0002]

2. Description of the Related Art As this kind of torsional damper, for example, Japanese Utility Model Laid-Open No. 6-69504 discloses a torsional damper for a lock-up clutch. The torsional damper described in the above publication is formed in a substantially disk-shaped hub, a pair of drive plates disposed on both sides of the hub, and at positions respectively corresponding to the hub and the pair of drive plates. A plurality of windows, a spring member housed in the plurality of windows and linking the hub and the drive plate in an elastic relative rotatable manner, and a circumferentially long slot formed in the hub. A connection focus that penetrates the pair of drive plates through the elongated holes, the hub is connected to the converter cover, the pair of drive plates is connected to the turbine hub, and the hub and the pair of drive plates are connected. It is possible to transmit torque between them.

The connecting pin connects the pair of drive plates to each other and cooperates with a long hole formed in the hub to determine a relative rotation range between the hub and the drive plate. That is, when the hub and the drive plate rotate relative to each other, the relative rotation between the hub and the drive plate stops because the connecting pin penetrating the elongated hole formed in the hub abuts on the inner periphery of the elongated hole. The range of the relative rotation is determined.

[0004]

In this type of torsional damper, it is desirable that the spring member that connects the hub and the drive plate so as to be able to rotate relative to each other performs a vibration absorbing action with a long bending amplitude. It is.

[0005] However, in the conventional example, the long hole is formed between windows adjacent to the window accommodating the spring member.

[0006] For this reason, since the long hole is formed in a range that does not interfere with the adjacent window, the length in the circumferential direction cannot be obtained sufficiently long, and the relative rotation between the hub and the drive plate cannot be obtained. The range of motion will be limited.

As a result, the desired length of the deflection amplitude of the spring member cannot be secured, and a sufficient vibration absorbing function may not be obtained.

The present invention has been devised in view of such a conventional situation, and it is possible to easily increase the circumferential amplitude of a long hole to increase the deflection amplitude of a spring member. It is an object of the present invention to provide a torsional damper capable of exhibiting a vibration absorbing action.

[0009]

SUMMARY OF THE INVENTION Therefore, the present invention is directed to a substantially disk-shaped hub, a pair of drive plates disposed on both sides of the hub, and a pair of the hub and a pair of drive plates. And a plurality of windows formed at positions corresponding to each, and housed in each of the plurality of windows,
A spring member for elastically connecting the hub and the drive plate so as to be relatively rotatable, a long hole formed in the hub in the circumferential direction, and a pair of drive plates passing through the long hole to connect the drive plate to each other. A torsion damper for connecting the hub and a pair of drive plates for transmitting torque between the hub and the pair of drive plates, wherein the elongated hole is formed radially outward of a plurality of windows of the hub.

According to a second aspect of the present invention, in the configuration of the first aspect, the long hole is formed corresponding to a plurality of windows of the hub. A part is connected to the corresponding window of the hub.

According to a third aspect of the present invention, in the configuration of the first aspect, the connecting pin is located radially outside the plurality of windows and substantially at the center of the circumferential width of the windows. In this configuration, a pair of drive plates are connected to each other.

According to a fourth aspect of the present invention, in the configuration of the first aspect of the present invention, the elongated hole has an axial center radially outside the plurality of windows of the hub and between adjacent windows. Is formed at a position substantially at the center.

In such a configuration, the torsion damper is applied to a clutch such as a lock-up clutch, and is capable of transmitting torque between a hub and a pair of drive plates.

That is, in the torsional damper, for example, a hub is connected to an input member, a pair of drive plates are connected to an output member, and drive torque is output from the input member via the hub, spring member, and drive plate. It is output to a member and controls torque transmission between the input member and the output member.

When the torsional damper controls the torque transmission, a relative rotation occurs between the hub and the drive plate via a spring member, and the vibration superimposed on the driving torque is caused by the spring action of the spring member. It is absorbed.

At this time, the elongated hole through which the connecting pin for connecting the pair of drive plates to each other penetrates is formed radially outward of the plurality of windows of the hub, and does not interfere with the window of the hub. A long dimension is secured in the circumferential direction of the hub.

For this reason, the hub and the drive plate can rotate relatively long in the circumferential direction, and the deflection amplitude of the spring member that connects the hub and the drive plate so as to be relatively rotatable can be made sufficiently long. It is possible to secure.

Thus, the spring member that connects the hub and the drive plate so as to be relatively rotatable can perform a vibration absorbing action with a long bending amplitude.

Therefore, it is possible to easily increase the bending amplitude of the spring member by increasing the circumferential length of the long hole, and obtain a torsional damper capable of exhibiting an excellent vibration absorbing action. .

According to the second aspect of the present invention, since a part of the inner periphery of the long hole communicates with the corresponding window of the hub, the long hole and the window can be formed integrally. , Can be easily processed.

According to the third aspect of the present invention, the connecting pin connects the pair of drive plates to each other at a position radially outward of the window and substantially at the center of the circumferential width of the window. Therefore, the connecting pin can prevent the spring member from jumping outward in the radial direction due to the centrifugal force.

Further, in the invention according to claim 4, the long hole is positioned such that the axis of the long hole is radially outside the plurality of windows of the hub and substantially in the center between the adjacent windows. Therefore, the elongated hole and the window are arranged in the hub in a well-balanced manner, and a local decrease in rigidity of the hub can be prevented.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings as an embodiment applied to a torsional damper of a lock-up clutch.

FIG. 1 is a sectional view showing a main part of a lock-up clutch to which the torsion damper of the present invention is applied, and FIG. 2 is a partially cutaway view of the torsion damper applied to the lock-up clutch of FIG. In the plan view, the upper half is a drawing showing one drive plate removed, and FIG. 3 is a sectional view taken along the line AOA of FIG.

In the figure, reference numeral 1 denotes a lock-up clutch,
The lock-up clutch 1 includes a converter cover 3 integrally connected to a pump impeller 2 and a turbine runner 4.
It is housed and arranged between them.

Reference numeral 5 denotes a turbine hub to which the inner peripheral portion of the turbine runner 4 is attached. The turbine hub 5 has a boss 6 and a flange 7. A spline 8 is formed on the inner periphery of the boss 6, and can be connected to an output shaft 9 via the spline 8. The inner peripheral side of the turbine runner 4 and the inner peripheral side of a drive plate described later are attached to the side surface of the flange portion 7 by rivets 10.

An inner cylinder 11 and an outer cylinder 12 are attached to the converter cover 3 in the axial direction, facing the turbine runner 4 side. The inner cylinder 1
External teeth 13 are formed at predetermined positions on the outer peripheral side of the first cylinder 1, and internal teeth 14 are formed at predetermined positions on the inner peripheral side of the outer cylinder 12. A boss 6 of the turbine hub 5 is supported on the inner peripheral side of the inner cylinder 11 via a bearing 15.

The lock-up clutch 1 has an inner periphery in contact with the outer periphery of the inner cylinder 11 and an outer periphery in contact with the outer cylinder 12.
Annular piston 18 which is slidable in the axial direction in contact with the inner circumference of
And a torsion damper 19 capable of elastically connecting the converter cover 3 and the turbine hub 5 so as to be relatively rotatable.

The piston 18 is made of a steel plate material and has an annular recess 20. The inner peripheral side and the outer peripheral side are in liquid-tight contact with the inner cylinder 11 and the outer cylinder 12 via seal members 21 and 22, respectively. ing. Further, internal teeth 23 are formed at predetermined positions on the inner peripheral side, and mesh with the external teeth 13 of the inner cylinder 11.

Accordingly, the piston 18 is connected to the inner cylinder 11 so as to be relatively non-rotatable and slidable in the axial direction. 24 and the second oil chamber 25.

The torsion damper 19 includes a substantially annular hub 2.
6, a pair of drive plates 27 disposed on both sides of the hub 26, a plurality of windows 28 and 29 formed at positions respectively corresponding to the hub 26 and the drive plate 27, and a plurality of windows Compression springs (spring members) 30, which are housed in the housings 28 and 29, respectively, and elastically connect the hub 26 and the drive plate 27 so as to be relatively rotatable, are configured as main elements.

The hub 22 is formed in a substantially annular shape from a steel plate material, and eight windows 28 are formed at equal circumferential intervals in this embodiment. The hub 26 is formed with a long hole that is long in the circumferential direction, that is, an arc-shaped long hole 33. In this embodiment, the long hole 33 is provided with a plurality of windows 2.
8 and is formed radially outside of the window 28, and a part of the inner periphery of the long hole 33 is formed to be in communication with the corresponding window 28 (see FIG. 2). .

The state of communication between the window 28 and the elongated hole 33 is such that each of the window 28 and the elongated hole 33 communicates only at a substantially central portion in the circumferential direction. A circumferential projection 28a is formed on the outer side in the radial direction, that is, on the side of the elongated hole 33, so that the compression spring 3
0 is prevented from jumping out of the window 28, and the compression spring 30 is stably supported.

The outer peripheral end of the hub 22 is bent in the axial direction to form a flange 34, on which external teeth 35 are formed.

The pair of drive plates 27 are made of a steel plate material and are connected to each other by connecting pins 36. The connecting pins 36 pass through the elongated holes 33 of the hub 26. The inner peripheral sides of the pair of drive plates 27 are connected to the turbine hub 5 by rivets 10.

The connecting pin 36 is connected to the drive plate 2
7 at a position radially outward of the plurality of windows 29 and substantially at the center of the circumferential width of the window 29, a pair of drive plates 27.
Are interconnected.

Eight windows 29 formed in each of the pair of drive plates 27 are formed at regular intervals in the circumferential direction corresponding to the windows 28 of the hub 26. Holding protrusions 29a and 29b are formed at the inner and outer ends of the window 29 to cover a part of the outer periphery of the compression spring 30 and prevent the compression spring 30 from jumping out. It is.

The compression spring 30, as best shown in FIG.
It is accommodated and arranged in 8, 29.

Reference numeral 38 denotes a clutch plate which is disposed between the outer cylinder 12 mounted on the converter cover 3 and the flange 34 of the hub 26.
The converter cover 3 and the hub 26 can be connected.

More specifically, the clutch plate 38
It comprises an input plate 39 connected to the outer cylinder 12 and an output plate 40 connected to the flange 34 of the hub 26.

The input plate 39 is made of a steel plate material, and has external teeth 41 formed on the outer peripheral side and meshes with the internal teeth 14 of the outer cylinder 12, whereby the input plate 39 cannot rotate relative to the outer cylinder 12. And movably connected in the axial direction. In this embodiment, three input plates 39 are provided, and the input plate 39 provided on the side close to the piston 18 is
8, while the input plate 39 provided on the side near the turbine runner 4 is prevented from being pulled out of the outer cylinder 12 by the retaining ring 42.

The output plate 40 is constructed by sticking friction plates on both sides of a steel plate member, and has internal teeth 43 on the inner peripheral side.
Are formed and mesh with the external teeth 35 of the flange 34,
Thereby, it is connected to the hub 26 so as not to be able to rotate relatively and to be movable in the axial direction. The output plate 40 is disposed between the input plates 39 adjacent to the three input plates 39.

In such a configuration, a flywheel (not shown) is connected to the converter cover 3, and the drive torque input from the flywheel drives the converter cover 3 and the pump impeller 2 to rotate. The rotation of the converter cover 3 and the pump impeller 2 is output to the output shaft 9 after two transmission paths are selected.

That is, in one of the torque transmission paths to the output shaft 9, the rotation of the converter cover 3 is directly transmitted to the turbine hub 5 through the lock-up clutch 1, and the output shaft 9 is rotated through the turbine hub 5. It is transmitted to. Another transmission path is that the rotation of the pump impeller 2 is controlled by the turbine runner 4 via hydraulic oil inside the converter.
And further transmitted to the turbine hub 5 and output to the output shaft 9 via the turbine hub 5.

Here, the first oil chamber 24 and the second oil chamber 2
5 can be controlled by a control device (not shown). By controlling the pressure of the hydraulic oil in the first oil chamber 24 and the second oil chamber 25, the output shaft 9 can be controlled by the converter cover 3. Is selected as follows.

First, when the oil pressure in the first oil pressure chamber 24 is increased relative to the oil pressure in the second oil pressure chamber 25, the piston 18 is pushed by the oil pressure in the first oil pressure chamber 24 and the converter cover is pressed. 3, the side surface of the piston 18 on the second oil chamber 25 side contacts the clutch plate 38 on the outer peripheral side, and press-contacts the input plate 39 and the output plate 40 of the clutch plate 38. That is, when the piston 18 contacts the input plate 39 on the side close to the piston 18 and presses the input plate 39 rightward in FIG. 1, the input plate 39 is pressed against the output plate 40.

Thus, the converter cover 3 and the turbine runner 4 are connected via the lock-up clutch 1.

Therefore, the driving torque input to the converter cover 3 is transmitted from the outer cylinder 12 to the hub 26 of the torsion damper 19 via the clutch plate 38, and is transmitted to the turbine via the compression spring 30 and the drive plate 27. The power is transmitted to the hub 5 and output to the output shaft 9. At this time, the vibration superimposed on the driving torque is generated by the spring member 3.
Vibration is absorbed by a zero spring action.

On the other hand, when the hydraulic pressure in the second hydraulic chamber 25 is relatively increased, the piston 18 is pushed back by the hydraulic pressure in the second hydraulic chamber 25 and moves to the converter cover 3 side, and the pressing of the clutch plate 38 is stopped. It is released. Thus, the connection between the converter cover 3 and the turbine runner 4 via the lock-up clutch 1 is released. For this reason, the driving force from the pump impeller 2 that rotates integrally with the converter cover 3 is transmitted to the turbine runner 4 via the hydraulic oil inside the converter, and the turbine hub 5
Is output to the output shaft 9 via the.

Here, when the torsion damper 19 controls the torque transmission, a relative rotation occurs between the hub 26 and the drive plate 27 via the spring member 30, and the vibration superimposed on the driving torque is: Vibration is absorbed by the spring action of the spring member 30.

At this time, the pair of drive plates 2
Elongate hole 33 through which connecting pin 36 interconnecting
Are formed radially outward of the plurality of windows 28 of the hub 26, and a long dimension in the circumferential direction of the hub 26 is secured without interfering with the windows 28 of the hub 26.

For this reason, the hub 26 and the drive plate 27 can rotate relatively long in the circumferential direction, and the bending of the spring member 30 that connects the hub 26 and the drive plate 27 so as to be relatively rotatable. It is possible to ensure a sufficiently long amplitude.

Thus, the spring member 30 for connecting the hub 26 and the drive plate 27 so as to be relatively rotatable.
Can exhibit a vibration absorbing action with a long deflection amplitude.

Therefore, it is possible to easily increase the bending amplitude of the spring member 30 by increasing the circumferential length of the long hole 33, and to provide a torsional damper capable of exhibiting an excellent vibration absorbing effect. 19 is obtained.

A part of the inner periphery of the elongated hole 33 is
By communicating with the corresponding windows 28 of 6, these long holes 33 and the windows 28 can be integrally formed, so that they can be easily processed.

Further, since the connecting pin 36 connects the pair of drive plates 27 to each other at a position radially outside the windows 28 and 29 and substantially at the center of the circumferential width of the windows 28 and 29, The connection pin 36 can prevent the spring member 30 from jumping outward in the radial direction due to centrifugal force.

FIGS. 4 and 5 show another embodiment of the present invention. This embodiment is different from the above-described embodiment in that the elongated pin 33 where the connecting pin 36 penetrates is formed. The elongated hole 33 of this embodiment is formed such that the axis of the elongated hole 33 is located radially outside the plurality of windows 28 of the hub 26 and substantially at the center between the adjacent windows 28. ing.

That is, as shown in FIG. 4, the elongated hole 33 is formed radially outward of the plurality of windows 28 of the hub 26, and the axis of the elongated hole 33 is located between the adjacent windows 28. It is located approximately in the center. Although the axis of the long hole 33 is located substantially at the center between the adjacent windows 28, since the long hole 33 is long in the circumferential direction, both ends of the long hole 33 in the circumferential direction are viewed in the radial direction. The window 28 overlaps both ends in the circumferential direction. However, the long hole 33 does not interfere with the plurality of windows 28.

Since other configurations are the same as those of the above-described embodiment, the same components are denoted by the same reference numerals, and redundant description will be omitted.

Even in such a configuration, the long hole 33 has a long dimension in the circumferential direction of the hub 26 without interfering with the window 28 of the hub 26, so that the spring member 30 has a long bending amplitude. It is possible to exhibit a vibration absorbing action.

Therefore, even in this embodiment,
The torsional damper 19 that can easily increase the bending amplitude of the spring member 30 by increasing the circumferential length of the long hole 33 and can exhibit an excellent vibration absorbing action can be obtained.

In addition, the elongated hole 33 is formed such that the axis of the elongated hole 33 is radially outside the plurality of windows 28 of the hub 26,
In addition, since the hole 28 and the window 28 are formed at substantially the center between the adjacent windows 28, the elongated hole 33 and the window 28 are arranged in the hub 26 in a well-balanced manner, thereby preventing a local decrease in rigidity of the hub 26. can do.

The embodiment of the present invention has been described with reference to the drawings. However, the specific configuration is not limited to this embodiment, and can be changed without departing from the gist of the invention.

[0064]

As described above in detail, according to the present invention, it is possible to easily increase the bending amplitude of the spring member by increasing the circumferential length of the long hole, and to achieve excellent vibration absorption. A torsional damper capable of exerting an action is obtained.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a main part of a lock-up clutch to which a torsional damper of the present invention is applied.

FIG. 2 is a plan view showing a part of the torsional damper applied to the lock-up clutch shown in FIG. 1 in a cutaway manner, and an upper half thereof is a drawing showing one drive plate removed;

FIG. 3 is a sectional view taken along line AOA of FIG. 2;

FIG. 4 is a view similar to FIG. 2, showing another embodiment of the present invention.

FIG. 5 is a sectional view taken along line AOA of FIG. 4;

[Explanation of symbols]

 19 Torsion damper 26 Hub 27 Drive plate 28 Window 29 Window 30 Compression spring 33 Slot 36 Connecting pin

Claims (4)

[Claims] 1. A substantially disk-shaped hub, a pair of drive plates disposed on both sides of the hub, and a plurality of windows formed at positions respectively corresponding to the hub and the pair of drive plates. A spring member which is housed in each of the plurality of windows and elastically connects the hub and the drive plate so as to be relatively rotatable; a circumferentially long slot formed in the hub; A torsion damper that penetrates and connects the pair of drive plates to each other, and controls the torque transmission between the hub and the pair of drive plates. A torsional damper characterized by being formed on the outside. 2. The long hole is formed corresponding to a plurality of windows of the hub, and a part of an inner periphery of the long hole communicates with a corresponding window of the hub. The torsion damper according to claim 1. 3. The connecting pin connects the pair of drive plates to each other at a position radially outward of the plurality of windows and at a substantially central position in a circumferential width of the window. Item 2. A torsional damper according to Item 1. 4. The elongated hole is formed so that its axis is located radially outside the plurality of windows of the hub and substantially at the center between adjacent windows. The torsional damper according to 1.