WO2000077418A1

WO2000077418A1 - Torsional vibration damping device

Info

Publication number: WO2000077418A1
Application number: PCT/JP2000/001406
Authority: WO
Inventors: Hiroki Yamamoto
Original assignee: Unisia Jecs Corporation
Priority date: 1999-06-16
Filing date: 2000-03-09
Publication date: 2000-12-21
Also published as: JP4049942B2; JP2000356250A

Abstract

A torsional vibration damping device, wherein a spring storing part (6) is provided to store a spring (3) connected relatively rotatably to a drive plate (5) which is disposed opposedly to a hub plate (4) at an interval, the spring storing part (6) of the drive plate (5) connects a side plate (51) to the outer peripheral part of a drive plate main body (50), the spring is disposed between the side plate and the drive plate main body (50) so as to prevent its falling-off, and a plurality of axial projections (51g) which are formed at the tip of a flange (51f) formed on the outer periphery of the side plate are weld-connected in the state of being engaged with a notch part formed on the outer peripheral edge of the drive plate main body, whereby a reduction in diameter of the device by a reduction in space necessary for the outer periphery of the spring becomes compatible with a transmission of a high torque and also a high connecting rigidity can be obtained so as to prevent the spring from falling off in order to increase the reliability of the device.

Description

Technical field of torsional vibration damping device

The present invention relates to a torsional vibration damping device that is used for a lock-up clutch or the like of a torque compensator interposed between an engine and a transmission and attenuates torsional vibration generated between two plates. Background art

Conventionally, a torque converter provided with a lock-up clutch is provided with a device called a lock-up damper that attenuates torsional vibration generated at lock-up in the lock-up clutch. As such a conventional technique, for example, a technique described in Japanese Patent Application Laid-Open No. 11-71256 is known.

That is, in this publication, a lock-up state is established by a multi-plate clutch type lock-up clutch capable of connecting a torque converter cover rotated by an engine and an input shaft of a transmission and a hub connected to a night bin runner. A lock-up damper that attenuates torsional vibration transmitted through the lock-up clutch in a torque compensator that can be formed is described. In this lock-up damper, a hub plate is formed integrally with a hub, and a drive plate is arranged on the hub plate so as to face the gap, and both plates are arranged via a plurality of circumferentially arranged spring members. And are connected so as to be relatively rotatable. Further, when the spring is accommodated, the spring accommodated in the spring accommodating hole of the hub plate is sandwiched from both sides by the drive plate and the side plate provided integrally with the drive plate to prevent falling off. It is configured as follows. The entire surface of the hub plate and the drive plate are separated from each other at regular intervals so as not to generate a friction torque when they are relatively rotated.

Therefore, according to the technology described in the above-mentioned conventional publication, the torque fluctuation when the lock-up clutch is engaged and the torsional vibration generated due to the torque fluctuation of the engine and the like are attenuated by the elastic deformation of the spring, and a stable Output transmission can be achieved.

However, in the conventional technique, when the side plate is integrally fixed to the drive plate, the outer peripheral edges of both plates are fixed by rivets or pins. Therefore, in such a fixing structure, first, the outer peripheral edge of the hub plate exists at the outer peripheral portion of the spring, and the rivet connection portion between the drive plate and the side plate exists outside the outer peripheral edge. If a large space is required on the outer periphery of the spring in this way, when high torque is input to this lockup damper (torsional vibration damping device), the spring must be arranged as far away from the center of rotation as possible. However, there is a problem in that the size of the device becomes larger as the outer diameter of the device increases.

Or, from the opposite perspective, if the outer diameter of the device is limited, the spring can be placed at a position far inward from the outer diameter, making it impossible to handle high torque transmission. There is. That is, the conventional technology has a problem in that it is not possible to achieve both miniaturization of the device and transmission of high torque.

In order to solve this problem, the rivet is fixed at a position other than the outer periphery of the spring, and the position is located inside the outer peripheral end of the position where the spring is located, so that the outer peripheral direction of the spring is It is conceivable to reduce the space, but in this case, a new problem arises in that the rigidity at the position of the spring is reduced, and the spring may jump out at a high rotation. Disclosure of the invention

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and in connecting the drive plate and the side plate at the outer periphery, the space required for the outer periphery of the spring is reduced to reduce the diameter of the device. The objective is to achieve both high performance and high torque transmission, and to achieve high coupling stiffness to prevent the spring from falling off and increase the reliability of the device.

In order to achieve the above object, the present invention is directed to a substantially disk-shaped hub plate, a drive plate opposed to the hub plate via a gap, and a peripheral plate at a position corresponding to each of these plates. A spring accommodating portion formed in a plurality of directions, and a spring member arranged in the spring accommodating portion and connecting the hub plate and the drive plate so as to be relatively rotatable. A torsion vibration damping device configured to couple a side plate to an outer peripheral edge of the plate body and to dispose the spring between the side plate and the drive plate body to prevent the plate from falling off; When connecting the main body and the side plate, the outer peripheries of both plates were connected by welding. There.

Therefore, since no rivets are used to connect the drive plate body and the side plate, the space required for the outer periphery of the spring member is reduced, and the outer diameter of the device is reduced to reduce the size. In addition, it is possible to arrange the spring member on the outer peripheral side as much as possible so that high torque can be transmitted.

In addition, since the drive plate body and the side plate are joined by welding, the joining rigidity can be increased, thereby preventing the spring accommodating portion of the drive plate from being deformed and the spring member from falling off. .

Further, as described in claim 2, in the torsional vibration damping device according to claim 1, in joining the drive plate body and the side plate by welding, It is preferable to perform welding at a position between circumferentially adjacent spring members.

In such a configuration, it is not necessary to provide a welding space on the outer peripheral side of the spring member, and the spring member can be arranged on the outer peripheral side relative to the outer diameter of the device. Thereby, higher torque transmission becomes possible more and more.

Further, as described in claim 3 or 4, in the torsional vibration damping device according to claim 1 or 2, an axial projection protruding in an axial direction is formed on one of the drive plate body and the side plate. A plurality of cutouts are formed on the other of the two plates in the circumferential direction to engage with the axial protrusions, and the axial protrusions are engaged with the cutouts. It is preferable to weld the inner peripheral side and the outer peripheral side of the notch.

With this configuration, it is possible to prevent the welding beat from protruding to the outer peripheral side of the drive plate, thereby making it possible to reduce the diameter of the device, that is, to reduce the size.

According to a fifth aspect of the present invention, in the torsional vibration damping device according to the third or fourth aspect, a flange portion is formed in an axial direction on an outer periphery of one of the drive plate main body and the side plate, and the flange is formed. It is preferable that the axial projection is formed at the tip of the portion.

In such a configuration, the strength of the drive plate in the rotational direction is improved, thereby improving reliability and reducing the size and weight of the device. Also, as in claim 6, in the torsional vibration damping device according to any one of claims 1 to 5, the drive plate body and the side plate are heat-treated, and the welding is performed using a stainless steel wire. Is preferred.

With such a configuration, the heat treatment members can be strongly welded to each other, thereby improving the reliability of the device and reducing the size and weight of the device. BRIEF DESCRIPTION OF THE FIGURES FIG. 1 is a sectional view showing a torsional vibration damping device according to an embodiment.

FIG. 2 is a cross-sectional view of a main part of a torque converter to which the torsional vibration damping device according to the embodiment is applied.

FIG. 3 is a front view and a rear view showing an assembled state of the hub plate and the drive plate body according to the embodiment.

FIG. 4 is a sectional view showing the drive plate body of the embodiment.

FIG. 5 is a cross-sectional view showing the side plate according to the embodiment.

FIG. 6 is a front view of the drive plate body of the embodiment. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described. FIG. 2 is a sectional view schematically showing a torque converter TC to which the torsional vibration damping device according to the embodiment of the present invention is applied. First, the configuration will be described. As is well known, in this torque converter TC, the rotational force from the engine (not shown) is input to the converter cover 1 and the torque converter TC is integrally attached to the converter cover 1. This is configured to rotate the pump impeller and transmit torque to the evening bin runner 21 via oil. The turbine runner 21 is connected to a hub 22 so that the rotation of the hub 22 is transmitted to an input shaft of a transmission (not shown).

A lock-up clutch L C is provided between the hub 22 and the converter cover 1. The lock-up clutch LC consists of an outer clutch plate carrier 2, an outer clutch plate 8, an inner clutch plate 9, a piston 10, an inner clutch plate carrier 11, a hydraulic chamber 12, an oil passage 13, and a support 15 This is a well-known method in which the hydraulic pressure is supplied to the hydraulic chamber 12 and is tightened, and is released when the hydraulic pressure is released.

On the hub 22, a plate 21 a integral with the evening bin runner 21, a drive plate 5, and a hub plate support member 7 are fixed by rivets 23. You. The drive plate 5 constitutes a part of a lock-up damper LD as a torsional vibration damping device for attenuating torsional vibration when driving is transmitted between the lock-up clutch LC and the hub 22. The configuration of the lock-up damper LD will be described.

The lock-up damper LD includes a spring 3 as a spring member, a hub plate 4, a drive plate 5, and a hub plate support member 7.

The hub plate 4 is formed in a substantially disk shape, is fixed to the inner clutch plate carrier 11 with rivets 24, and is rotatably supported on the outer periphery of the hub plate support member 7. Further, FIG. 3 shows a front view and a rear view in a state where the hub plate 4 and a drive plate body 50 described later are assembled in half, respectively. As shown in FIG. A plurality of spring receiving holes 4a are formed in the circumferential direction.

The drive plate 5 includes a drive plate body 50 and a side plate 51 as shown in FIG. 1 which is a cross-sectional view of the lock-up damper LD. The drive plate body 50 is formed in a substantially disk shape, is provided facing the hub plate 4 with a gap, and a spring storage hole 50 a is provided at a position corresponding to the spring storage hole 4 a. It is opened, and flanges 50b are formed above and below it to prevent the spring from falling off (see the sectional view in Fig. 4). The side plate 51 is also provided facing the hub plate 4 with a gap, and is formed in a substantially disk shape as shown in the cross-sectional view of FIG. A flange 51 f is formed in the direction, and a spring storage hole 51a is opened at a position corresponding to the spring storage hole 4a, 50a. Are formed. The drive plate body 50 and the side plate 51 are integrally fixed by a welded portion 5y provided on the outer peripheral edge and a rivet 25 provided at an inner position.

Then, the positions of the spring storage holes 4a, 50a and 51a are made to coincide with each other. P 0

The spring 3 is housed in the spring housing 6 thus formed, and the hub plate 4 and the drive plate 5 are connected by the spring 3. Therefore, the hub plate 4 and the drive plate 5 are configured to be able to rotate relative to each other by the elastic deformation allowance of the spring 3. A rivet 25 fixed to the drive plate 5 is inserted into a spring storage hole 4a opened in the hub plate 4 so as to be relatively movable in the circumferential direction.

Further, at a position closer to the inner periphery than the center of the drive plate body 50, a projecting portion 5b projecting toward the hub plate 4 is provided so as to protrude over the entire periphery. That is, the drive plate 5 includes the side plate 51 and is axially separated from the hub plate 4, but the protrusion 5b has a larger separation distance than the other portions. It is configured nearby. The surface of the protruding portion 5b facing the hub plate 4 is subjected to a low friction treatment.

Next, the configuration of the welded portion 5y between the drive plate body 50 and the side plate 51, which is a feature of the present embodiment, will be described. FIG. 6 is a front view of the drive plate body 50. A cutout portion 50c is formed on the outer peripheral edge of the drive plate body 50 at a position between the spring storage holes 50a in the circumferential direction. I have. On the other hand, a plurality of axial projections 5 lg which are inserted into the notch 50 c in the axial direction and engage in the circumferential direction are formed at the tip of the flange 51 f of the side plate 51 (FIG. 1). In the state where the axial projection 51 g and the notch 50 c are engaged with each other, a welded portion is welded between the inner peripheral side of the axial projection 51 g and the outer peripheral side of the notch 50 c. 5 y is provided. Next, the operation will be described. When the lock-up clutch LC is not engaged, the torque input from the engine is input to the converter cover 11, input to the turbine runner 21 via oil, and transmitted from the hub 22 to an input shaft (not shown). Is done. Here, when the predetermined lock-up condition is satisfied and the lock-up clutch LC is engaged, the rotational force input to the converter cover 11 reduces the lock-up clutch LC. It is transmitted to the hub 22 via the latch LC. At this time, the power is transmitted from the lock-up clutch LC to the hub 22 via the hub plate 4 → the spring 3 → the drive plate 5.When torsional vibration occurs, the torsion vibration is generated based on the deformation of the spring 3. Thus, the two plates 4 are attenuated by relative displacement.

Here, when the hub plate 4 and the drive plate 5 are displaced in the direction in which they approach in the axial direction due to a change in the hydraulic pressure in the torque converter TC generated at lock-up, vibration of the engine, etc., the drive plate 5 The protruding portion 5b provided near the inner periphery of the abutment comes into contact with the hub plate 4, and the other portions are kept apart. As described above, since the contact between the plates 4 and 5 is limited to a position near the inner periphery and at a low friction coefficient, generation of a large friction torque is prevented, and stable torsional vibration damping performance is achieved. Is obtained.

Further, in the present embodiment, when the drive plate body 50 and the side plate 51 are connected, no rivet is used as the connection by the welded portion 5y at the outer periphery 緣. The space required for the outer periphery of the spring 3 is reduced, and the outer diameter of the lock-up damper LD is reduced to achieve downsizing, and the spring 3 is arranged as close to the outer periphery as possible to transmit high torque. In addition to the effect of achieving both, it is possible to obtain the effect of increasing the coupling rigidity, preventing the spring 3 from falling off, and improving the reliability of the product quality.

In addition, since the welded portion 5y is provided at a position between the springs 3, there is no need to provide a welding space on the outer peripheral side of the spring 3, and the spring 3 is provided with respect to the outer diameter of the lock-up damper LD. Can be arranged relatively on the outer peripheral side, whereby the effect that higher torque transmission can be achieved is obtained.

Furthermore, since the inner peripheral side of the axial projection 51g and the outer peripheral side of the notch 50c are welded at the welded portion 5y, the welding beat does not protrude to the outer peripheral side of the drive plate 5. This has the effect of reducing the size of the lockup damper LD.

Also, in the welded portion 5y, an axial flange 51f is formed on the side plate 51, and an axial protrusion 51g is formed at the tip of the flange 51f. 5 1 g and the notch 50 c formed in the drive plate body 50 are circumferentially engaged with each other, so that the strength of the drive plate in the fifth rotation direction is improved, thereby improving reliability. The effect is that the size and weight of the device can be reduced. Further, since the welded portion 5y is formed using a stainless steel wire, the drive plate main body 50, which is a heat-treated member, and the side plate 51 can be welded firmly. It is possible to improve the reliability of the device and reduce the size and weight of the device.

As described above, according to the first aspect of the invention, when the drive plate body and the side plate are connected to each other, the outer peripheral portion is connected by welding so that the rivet is not used. The space required for the outer periphery is reduced, and the size of the device is reduced by reducing the outer diameter of the device, and the spring member is placed as close to the outer periphery as possible to transmit high torque. In addition to the effect, the coupling rigidity can be increased to prevent the spring member from falling off, and the effect of improving the reliability of product quality can be obtained.

In addition, according to the second aspect of the present invention, it is not necessary to provide a welding space on the outer peripheral side of the spring member, and the spring member can be disposed relatively on the outer peripheral side with respect to the outer diameter of the device. Thus, the effect that higher torque transmission can be achieved is obtained.

Further, according to the third and fourth aspects of the present invention, it is possible to prevent the welding beat from protruding to the outer peripheral side of the drive plate, whereby the diameter of the device can be reduced, that is, the device can be reduced in size. can get.

According to the fifth aspect of the invention, the strength of the drive plate in the rotation direction is improved. However, this has the effect of improving the reliability and reducing the size and weight of the device.

Further, in the invention according to claim 6, the heat treatment members can be welded to each other firmly, whereby the effect of improving the reliability of the device and reducing the size and weight of the device can be obtained. Industrial applicability

The present invention is not limited to the configuration of the above-described embodiment, and can be changed in a range without changing the gist of the present invention. For example, in the embodiment, the swing vibration damping device of the present invention is applied to the lock-up damper of the lock-up clutch of the torque converter, but the application range is not limited to this. The present invention can be applied to a clutch other than the clutch, and it can also be used for a portion other than the clutch for transmitting torque.

Further, in the above embodiment, the flange 51 f is formed on the side plate 51, but a flange may be formed on the drive plate 50. In this case, the notch is preferably formed on the side plate, and the axial projection is preferably formed on the flange of the drive plate body.

Claims

The scope of the claims

1. A substantially disk-shaped hub plate,

A drive plate disposed opposite to the hub plate via a gap, a plurality of spring receiving portions formed in a circumferential direction at positions corresponding to the respective drive plates,

A spring member disposed in the spring accommodating portion to connect the hub plate and the drive plate so as to be relatively rotatable;

With

The spring accommodating portion of the drive plate has a side plate connected to an outer peripheral edge of the drive plate body, and the spring is disposed between the side plate and the drive plate body to prevent the spring from falling off. In the configured torsional vibration damping device,

A torsional vibration damper, wherein the drive plate body and the side plate are joined by welding the outer peripheral portions of both plates.

2. The torsional vibration damping device according to claim 1, wherein the drive plate main body and the side plate are welded at a position between circumferentially adjacent spring members when welding the drive plate body and the side plate.

3. A plurality of axial projections protruding in the axial direction are formed in one of the drive plate main body and the side plate in the circumferential direction, and the notch is engaged with the axial projection in the other direction in the other of the two plates. The inner peripheral side of the axial projection and the outer peripheral side of the notch are welded in a state where the axial projection and the notch are engaged with each other. Torsional vibration damping device.

4. A plurality of axial projections protruding in the axial direction are formed in one of the drive plate main body and the side plate in the circumferential direction, and the notch portion is engaged with the axial projection in the other direction in the other of both plates. Are formed, and these axial projections, cutouts, 3. The torsional vibration damping device according to claim 2, wherein the inner peripheral side of the axial projection and the outer peripheral side of the notch are welded together in a state where they are engaged.

5. The torsional vibration damping device according to claim 3, wherein a flange portion is formed on one outer periphery of the drive plate main body and the side plate in an axial direction, and the axial direction is formed at a tip of the flange portion. Torsional vibration damping device characterized by forming projections-

6. The torsional vibration damping device according to claim 1, wherein the drive plate body and the side plate are heat-treated, and the welding is performed using a stainless steel wire.