KR0139441B1 - Device for reducing torsional vibration - Google Patents

Abstract

[Objective] The direct contact between the driving plate and the driven plate is eliminated when thrust is applied to the driven plate and when the driving plate is tilted.

[Configuration] The driven plate 6 is mounted between the drive plates 5a and 5b, and the drive plates 5a and 5b and the driven plate 6 are elastically coupled in the rotational movement direction. The thrust ring 27 is retrofitted between the driven plate 6 and the edge part of the radially inner side of one drive plate 5a. The thrust plate 28 is retrofitted between the driven plate 6 and the edge part of the radially outer side of the other drive plate 5b. Thrust acting on the driven plate 6 is supported through the thrust ring 27, and the tilting movement of the drive plates 5a, 5b is mainly received through the thrust plate 28. As shown in FIG.

Description

Torsional Vibration Reduction Device

1 is a cross-sectional view taken along the line A-A of FIG. 2 showing an embodiment of the present invention.

2 is a partially broken front view showing the embodiment.

3 is a cross-sectional view showing another embodiment of the present invention.

4 is a cross-sectional view showing another embodiment of the present invention.

5 is a cross-sectional view showing another embodiment of the present invention.

6 is a cross-sectional view showing another embodiment of the present invention.

7 is a cross-sectional view showing the same embodiment.

* Explanation of symbols for main parts of the drawings

2: Torque converter 5a, 5b: Drive plate

6: driven plate 27: thrust ring (first low friction material)

28: thrust plate (the second low friction material)

The present invention relates to a torsional vibration reduction device used in a power transmission unit between an engine of a motor vehicle and a torque converter.

As a torsional vibration reducing device of this kind, between a pair of drive plates coupled to the engine side, a driven plate coupled to the torque converter side is retrofitted, and the drive plate and the driven plate are connected by a torsion spring. It is elastically connected in the direction of rotational movement and the torsional vibration of the power transmission system is reduced by the suction action of the torsion spring.

By the way, in this torsional vibration reducing device, since the drive plate and the driven plate are elastically coupled by the torsion spring, the thrust acting on the driven plate (thrust accompanying the increase in the internal pressure of the torque converter) and the thrust plate It is conceivable that the driving plate and the driven plate directly contact each other due to the tilting movement of the driving plate accompanied by the bending vibration, and noise such as noise is generated by the large friction generated at this time. For this reason, in order to cope with this, a low friction material was retrofitted between the driven plate and the edge portion of the inner side of the driving plate in the radial direction to prevent the occurrence of friction due to the direct contact between the driving plate and the driven plate. It is.

Such a similar technique is disclosed in, for example, Japanese Patent Application Laid-Open No. 58-144146.

However, in the conventional torsional vibration reducing device, since the low friction material is provided between the driven plate and the radially inner edge portion of each drive plate, when thrust acts on the driven plate, the low friction material is used. Strongly strong (since directly connected to the crankshaft) is firmly supported near the center of the drive plate. When the drive plate is tilted by the bending vibration of the crankshaft, the low friction material is the center of the drive plate or driven plate. By being disposed in the vicinity, it is not possible to sufficiently control the tilting motion with the drive plate, and it is conceivable that the drive plate and the driven plate directly contact when the bending vibration of the crankshaft is increased.

The present invention reliably prevents direct contact with the drive plate in the case where thrust is applied to the driven plate and when the drive plate is tilted to move, and the torsion vibration reduction device does not generate noise such as noise. Is to provide.

The present invention is a means for solving the above-described problems, wherein a driven plate coupled to the torque converter side is retrofitted between a pair of movable plates in which the radially inner edge portion is coupled to the engine side, and both of the drive plates and the driven A torsional vibration reducing device in which a plate is elastically connected in a rotational movement direction and a low friction material is installed to prevent direct contact between both plates between a driving plate and a driven plate. And the second low friction material was installed between the edge portion of the driven plate and the radially outer edge of the drive plate on the torque converter side, while being mounted between the radially inner edge portion of the drive plate on the engine side.

When the thrust force of the torque converter acts on the driven plate, the thrust is supported by the radially inner edge portion of the driving plate which is strong in strength through the first low friction material, and the driven plate directly contacts the driving plate. There is no work.

In addition, when the drive plate is tilted by the bending vibration on the engine side, the tilting motion is received by both drive plates through the first low friction material and the second low friction material. At this time, since the second low friction material is between the driving plate and the edge portion of the outer side in the radial direction of the driven plate, the tilting movement of the driving plate can be more reliably received, and therefore, the driving plate is in direct contact with the driven plate. none.

Next, an embodiment of the present invention will be described with reference to FIGS. 1 and 2.

The figure shows an example in which the torsional vibration reducing device 4 according to the present invention is used in the connection portion between the crankshaft 1 of the engine and the converter cover 3 of the torque converter 2, and (5a), ( 5b) is a drive plate in which the circumferential portion of the radially inner side is coupled to the cross section of the crankshaft 1, and 6 is a driven plate in which the edge portion of the radially outer side is coupled to the cross section of the converter 3.

The drive plates 5a and 5b are formed in a substantially disk shape by press forming, and the radially inner edge portion thereof is coupled to the crankshaft 1 with the bolts 7 in a polymerized state, and at the same time the radially outer side thereof. In the state where the edge portions of the two are spaced apart by a predetermined interval in the axial direction, they are engaged by the stop pin 8. Moreover, the ring gear 9 which engages with a starting motor pinion (not shown) is welded to the outer peripheral end of the driven plate 5a, and to the edge part of the radial direction inner side of the other drive plate 5b, An annular retainer plate 10 and a spring member 11, such as a dish spring for applying a force in the axial direction, are provided. The retainer plate 10 has a plurality of protrusions 12 extending axially in the outer circumferential portion thereof, the protrusions 12 being axially moved to the engaging holes 13 formed in the other drive plate 5b. It is inserted so that it may be caught by the drive plate 5b so that rotation may be carried out integrally.

On the other hand, the driven plate 6 is formed in a substantially disk shape by a relatively thick plate, and is installed to enable relative rotational movement between the two drive plates 5a and 5b, and at the same time, the drive plate 5b is mounted. It is coupled to the end surface of the converter cover 3 by the several boat 14 which penetrates. A stopper hole 15 into which the stop pin 8 is inserted is formed in the peripheral portion of the radially outer side of the driven plate 6, and is driven by the connection of the stop pin 8 and the stopper hole 15. The relative rotational movement angles of the plates 5a and 5b and the driven plate 6 can be regulated. Further, a plurality of windows 16 are formed in the driven plate 6 along the circumferential direction, and a pair of torsion springs 17 and 17 of the nest type are connected to each of the windows 16 in series. It is remodeled in a state. And between the driven plate 6 and the drive plates 5a and 5b, the annular fluid 18 is opened so that relative rotation can be performed with respect to both, and the plurality formed in this fluid 18 is provided. The two projections 19 are interposed between the torsion springs 17 and 17 in each window 16 so that the two torsion springs 17 and 17 act in series along the circumferential direction.

Moreover, the drive piece 20 is riveted to the said drive plate 5a so that the edge part of each window 16 of the driven plate 6 may be fixed, and the driven plate 5b is driven plate 5b. The same window 21 is formed corresponding to each window 16 of (6), and the torsion spring in each window 16 in the state which joined the drive plates 5a, 5b, and the driven plate 6 together. End portions 17 and 17 are connected to the driving piece 20 and the window 21. Therefore, the drive plates 5a and 5b and the driven plate 6 are elastically connected in the rotational movement direction via the torsion spring 17. Further, a plurality of long holes 22 corresponding to the bolts 14 are formed in the drive plates 5a and 5b, so that the drive plates 5a and 5b and the driven plate 6 are rotated relative to each other. The head 14 of the bolt 14 and the screwing projection 23 on the converter cover 3 side do not interfere with the driving plates 5a and 5b.

In addition, a plurality of long holes 24 are formed in the drive plate 6 along the circumferential direction, and in each of the long holes 24, the end faces in the axial direction are in frictional contact with the drive plate 5a and the retainer plate 10. A high friction coefficient friction block 25 is loosely fitted so as to be movable in the circumferential direction. And both ends of each long hole 24 are provided with the buffer member 26, such as rubber | gum material which consists of two layers of a low rigidity part and a high rigidity part, and drive plates 5a, 5b, and driven plate 6 are provided. When the relative rotational movement is performed, the shock absorbing member 26 is pressed and compressed by the friction block 25 so as to press and move the friction block 25. Therefore, the friction block 25 slides between the drive plate 5a and the retainer plate 10 when the drive plates 5a and 5b and the driven plate 6 are rotated relative to each other by a predetermined angle or more. At this time, friction damping force is generated.

However, between the driven plate 6 and the radially inner edge portion of one (engine side) drive plate 5a, the thrust ring 27 as the first low friction material is refurbished, and the driven plate 6 and A plurality of thrust plates 28 serving as the second low friction material are mounted on the edge portion of the other side (the torque converter 2 side) of the drive plate 5b in the radially outer side. The double thrust ring 27 is easily refurbished between the driven plate 6 and the drive plate 5a to be slidable with both the plates 6 and 5a. It is fitted in the same orientation as the direction, and the flat surface 28b is slidably joined to the driven plate 6 during the tilting movement of the drive plates 5a and 5b.

In the drawing, reference numeral 29 denotes a pump impeller integrally formed with the converter cover 3, and reference numeral 30 denotes a turbine hub, 31 denoted by a spline on an output shaft (not shown). A turbine runner coupled to the turbine hub 30 at a position opposite the impeller 29, 32 is a lock-up that directly connects the converter cover 3 and the turbine hub 30 by a hydraulic change in the converter cover 3. It is a piston.

Since the torsion vibration reducing device 4 is configured as described above, the drive torque of the engine and the drive plate 5a, 5b, the torsion spring 17, and the driven plate 6 are removed from the thrust plate 1. It is sequentially transmitted to the converter cover 3 of the torque converter 2. At this time, the torsional vibration of the power transmission system is reduced by the torsional vibration reducing device 4 as follows.

That is, while the relative rotational movement angles of the drive plates 5a and 5b and the driven plate 6 are smaller than the set angle, the torsional vibration is almost reduced only by the suction action of the torsion spring 17, and the drive plate ( When the relative rotational movement angles of 5a) and 5b and the driven plate are equal to or greater than the set angle, frictional damping action due to sliding of the friction block 25 occurs in addition to the suction action of the torsion spring 1, and the torsion vibration This is reduced by the action of both.

On the other hand, during engine operation, an axial thrust acts on the converter cover 3 by an increase in the pressure inside the torque converter 2, and this thrust acts on the driven plate 6 via the bolt 14. In one case, the driven plate 6 and the radially inner edge portion are pressed by the thrust ring 27, and at this time, the thrust is moved near the central portion of the drive plate 5a while sliding between the thrust ring 27. Supported. For this reason, the drive plates 5a and 5b and the driven plate 6 do not directly contact at this time. Here, the drive plate 5a is formed of a relatively thin plate, but the thrust is close to the engaging portion with the crankshaft 1 and is supported near the central portion of the strongly strong drive plate 5a, Even if a large thrust acts on the driven plate 6, there is no fear that deformation will occur in the drive plate 5a.

When the crankshaft 1 is tilted back and forth in the axial directions of the drive plates 5a and 5b by the bending vibration of the crankshaft 1, one drive plate 5a is slidably connected to the thrust ring 27, and the other. The driving plate 5b is slidably connected to the flat surface 28b of the trust plate 28, and the tilting movement of the driving plates 5a and 5b is such that the trust ring 27 and the trust plate 28 are connected. It is received by the driven plate 6 through. At this time, since the thrust plate 28 is installed between the driven plate 6 and the edge portion of the outer side in the radial direction of the drive plate 5b, when the tilting force of the drive plates 5a and 5b is large. Even if the tilt motion can be reliably received, the driving plates 5a and 5b and the driven plate 6 do not directly contact each other.

Embodiments of the present invention are not limited to those described above. For example, in the embodiments shown in FIG. 1 and FIG. 2, the plate-shaped trust ring 27 is used. Similarly, using the thrust ring 36 provided with the boss 35, this boss 35 is inserted in the inner circumferential hole 6a of the driven plate 6 to prevent displacement of the driven plate 6 in the radial direction. Also, as shown in FIG. 4, the thrust ball bearing 37 is used as the second low friction material, and the annular plate 38 supporting the thrust ball bearing 37 is provided. The thrust ball bearings 39 may be used as the second low friction material, as shown in FIG. 5, or attached to the edge portion of the driving plate 5b in the radially outer side. In addition, the thrust ball bearing 37 used as a 2nd low friction material rotates the ball 40 which receives a thrust load to the resin plate 41 with a low coefficient of friction, as shown in FIG. 6 and FIG. It may be of a simple structure held as possible.

As mentioned above, in this invention, the 1st low friction material is retrofitted between the driven plate and the edge part of the radial direction inner side of the drive plate by the engine side, and the 2nd low friction material is radial direction of the drive plate by the driven plate and the torque converter side. When the drive plate is mounted between the outer edge portions and the thrust force of the torque converter is applied to the driven plate, the thrust is supported by the radially inner edge portion of the driven plate which is strongly intensified through the first low friction material, and the drive is performed. When the plate is tilted, the tilted movement is mainly received by the second low friction material at the edge portion of the radially outer side of the driven plate, so that in any case, direct contact between the driving plate and the driven plate can be reliably prevented. Can be. Therefore, according to this invention, the noise which arises by the direct contact of a drive plate and a driven plate can be reliably prevented.

Claims (1)

Between a pair of drive plates in which the radially inner edge portion is coupled to the engine side, a driven plate coupled to the torque converter side is refurbished, and both drive plates and driven plates are elastically connected in the rotational movement direction, A torsional vibration reducing device in which a low friction material for preventing direct contact between both plates is provided between a drive plate and a driven plate, wherein the first low friction material is formed at an edge portion in the radially inner side of the driven plate and the drive plate on the engine side. And a second low friction material is mounted between the driven plate and the edge portion of the outer side in the radial direction of the drive plate on the torque converter side.