JP4280553B2 - Hysteresis torque mechanism of damper disk assembly - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a hysteresis torque generating mechanism, in particular, an input side plate to which torque from an engine is input, an output side plate that is provided relatively freely on the input side plate and outputs torque, and both plates in the rotational direction. The present invention relates to a hysteresis torque mechanism of a damper disk assembly that is provided in a damper disk assembly that includes an elastic member that is elastically connected and generates a hysteresis torque when both plates rotate relative to each other.
[0002]
[Prior art]
The damper disk assembly is used, for example, in a clutch disk assembly disposed between an automobile engine and a transmission. The damper disk assembly is generally a spline hub including an input side plate including a clutch plate and a retaining plate to which torque from an engine is input, and a hub that is spline-fitted to a disk-shaped flange portion and a transmission input shaft. And have. The input side plate and the spline hub are connected to each other by a torsion spring so as to be relatively rotatable in a predetermined angular range in the circumferential direction. A hysteresis torque generating mechanism is provided between the input side plate and the spline hub to generate a hysteresis torque by frictional force when the two members rotate relative to each other.
[0003]
The hysteresis torque generating mechanism generally has two friction washers, and one friction plate and one cone spring (see, for example, Patent Document 1). In other words, one friction washer is disposed between the clutch plate and the flange portion of the spline hub, and the cone spring, the friction plate, and the friction plate are sequentially disposed between the retaining plate and the spline hub flange portion. One friction washer is arranged. These members are assembled so as to be in pressure contact with each other between the clutch plate and the retaining plate and the spline hub. Therefore, when the clutch plate and the retaining plate and the spline hub rotate relative to each other, slip occurs between these members and the members constituting the hysteresis torque generating mechanism, and torque (hysteresis torque) due to frictional force is generated. It will be.
[0004]
[Patent Document 1]
JP-A-6-129444 (paragraphs 0002 to 0006, FIG. 6)
[0005]
[Problems to be solved by the invention]
The friction washer used in the hysteresis torque generating mechanism is usually a resin molded product, and the friction washer and a cone spring formed of spring steel or the like hinder cost reduction. Also, with the conventional hysteresis torque generation mechanism structure, misalignment between the input shaft of the transmission and the damper disk assembly is easily transmitted to the hysteresis torque generation mechanism and the torsion spring part, which reduces the life of the damper disk assembly. There is a problem of being connected.
[0006]
SUMMARY OF THE INVENTION An object of the present invention is to reduce costs in a hysteresis torque generating mechanism of a damper disk assembly and to suppress a reduction in life due to misalignment.
[0007]
[Means for Solving the Problems]
According to a first aspect of the present invention, there is provided a hysteresis torque generating mechanism for a damper disk assembly comprising: an input side plate to which torque from an engine is input; an output side plate that is provided on the input side plate so as to be relatively rotatable and that outputs torque; This mechanism is provided in a damper disk assembly having an elastic member that elastically connects the plates in the rotational direction, and generates a hysteresis torque when the plates rotate relative to each other. The mechanism has a first spacer and a second spacer. is doing. The first spacer is an annular and flat plate-like member having ribs protruding in the axial direction formed on the inner peripheral portion and disposed between both plates. The second spacer is an annular and flat plate-like member that is formed between the two plates so that a rib projecting in the axial direction is formed on the inner peripheral portion and pressed against the first spacer.
[0008]
In this mechanism, torque from the engine is transmitted from the input side plate to the output side plate via the elastic member, and further to the input shaft of the transmission. At this time, since there is a fluctuation in torque from the engine, the input side plate and the output side plate are relatively rotated by an angle corresponding to the torque fluctuation in both rotation directions in a state where they are relatively rotated by a predetermined angle. Along with this relative rotation, the first and second spacers pressed against each other between the input side plate and the output side plate frictionally slide to generate a hysteresis torque. Torque fluctuation is absorbed by this hysteresis torque, and transmission of fluctuation to the output side can be suppressed.
[0009]
Here, ribs protruding in the axial direction are formed on the first and second spacers, and the spacers are arranged so as to be in pressure contact with each other, so that the cone spring provided in the conventional mechanism becomes unnecessary. In addition, since the friction washer can be omitted or reduced, the cost can be easily suppressed. In addition, the ribs formed on both the spacers can secure a predetermined space in the axial direction while reducing the thickness of both spacers, thereby reducing the overall weight and cost. In addition, even if misalignment exists between the output side plate and the input shaft of the transmission connected thereto, the ribs of both spacers are easily elastically deformed. The bad influence to itself and an elastic member etc. can be suppressed. Furthermore, the preload, that is, the hysteresis torque can be adjusted by adjusting the height of the rib. Further, since the rib is disposed on the inner peripheral portion of the spacer, misalignment is easily absorbed by the rib.
[0010]
A hysteresis torque generating mechanism for a damper disk assembly according to a second aspect is the mechanism according to the first aspect, wherein the first spacer and the second spacer are arranged so that the ribs are in pressure contact with each other.
[0011]
In this case, since the ribs of both spacers are in contact with each other and pressed against each other, misalignment is more easily absorbed.
[0012]
Hysteresis torque generating mechanism of the damper disk assembly according to claim 3 is the mechanism according to claim 1 or 2, ribs of the first and second spacers are partly formed in their respective circle circumference on .
[0013]
Hysteresis torque generating mechanism of the damper disk assembly according to 請 Motomeko 4 is the mechanism according to claim 1 or 2, ribs of the first and second spacers is continuous on the circumference in the peripheral portion respectively formed Has been .
[0014]
Hysteresis torque generating mechanism of the damper disk assembly according to 請 Motomeko 5, in any mechanism of claims 1 4, further have the output-side plate and the friction washer arranged axially between the second spacer is doing. In this case, it becomes easy to relatively increase the hysteresis torque. Further, the hysteresis torque can be easily adjusted by changing the material of the friction washer.
[0015]
A hysteresis torque generating mechanism for a damper disk assembly according to a sixth aspect is the mechanism according to the fifth aspect, wherein the side surfaces of the second spacer and the friction washer are bonded to each other. In this case, handling becomes easy.
[0016]
According to a seventh aspect of the present invention, in the mechanism for generating hysteresis torque of the damper disk assembly according to any one of the first to sixth aspects, the outer periphery of the first spacer is supported by the input side plate.
[0017]
The hysteresis torque generating mechanism of the damper disk assembly according to claim 8 is the mechanism according to any one of claims 1 to 7, wherein the input side plate includes a first plate and a second plate arranged on both sides of the output side plate. And the first spacer and the second spacer are disposed between the first plate and the output side plate. In addition, a rib protruding in the axial direction is formed between the second plate and the output side plate, and an annular plate-like third spacer that presses against the second plate and the output side plate is further provided.
[0018]
In this case, misalignment can be absorbed more efficiently due to the presence of the third spacer.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
1 and 2 show a damper disk assembly having a hysteresis torque generating mechanism according to an embodiment of the present invention. The OO line is the rotation center line.
[0020]
In the figure, the damper disk assembly has an output-side hub 1 at the center thereof. The hub 1 has spline teeth 1a meshing with an outer peripheral spline portion of an input shaft of a transmission (not shown) at the center thereof. Moreover, the hub 1 has the flange part 2 integrally on the outer peripheral side. Six window holes 2 a extending in the circumferential direction are formed at equal intervals on the outer periphery of the flange portion 2. In addition, six stopper notches 2b are formed between adjacent window holes 2a.
[0021]
On the other hand, a clutch plate 4 and a retaining plate 5 are disposed on both sides of the flange portion 2 of the hub 1. The clutch plate 4 and the retaining plate 5 are plate members on a substantially circular plate whose inner peripheral portion is rotatably fitted to the hub 1 from the outer peripheral side, and the outer peripheral portion is further further than the flange portion 2. It extends in the outer circumferential direction. A plurality of cushioning plates 7 are fixed to the outer periphery of the clutch plate 4 by a plurality of rivets 6 respectively. An annular facing member 8 is fixed to these cushioning plates 7. The clutch plate 4 and the retaining plate 5 are connected to each other by a plurality of stopper pins 9 at the outer peripheral portion thereof. Each stopper pin 9 passes through a stopper notch 2 b formed on the outer peripheral portion of the flange portion 2. When each stopper pin 9 comes into contact with the stopper notch 2b, the twist of the clutch plate 4 and the retaining plate 5 with respect to the hub 1 is restricted.
[0022]
In the clutch plate 4 and the retaining plate 5, six spring support portions 4a and 5a are formed corresponding to the six window holes 2a of the flange portion 2, respectively. The spring support portions 4a and 5a are formed so as to swell away from each other (outward in the axial direction). Two torsion springs 3a and 3b and a spring seat 3c are accommodated in two opposing positions among the six window holes 2a and the spring support portions 4a and 5a. Further, other torsion springs 3d and 3e are accommodated in the remaining four places.
[0023]
Next, the hysteresis torque generating mechanism will be described in detail.
[0024]
As described above, the clutch plate 4 and the retaining plate 5 are connected by the stopper pin 9 at the outer peripheral portion, but are also connected by the six stud pins 10 at the inner peripheral portion. These stud pins 10 restrict the axial distance between the clutch plate 4 and the retaining plate 5 to a predetermined dimension, and a hysteresis torque generating mechanism 11 is provided in this axial space. The flange portion 2 is formed with a long hole 2c that is long in the circumferential direction so that the stud pin 10 can penetrate and rotate within a predetermined angular range.
[0025]
The hysteresis torque generating mechanism 11 includes a first spacer 12, a second spacer 13, a friction washer 14, and a third spacer 15. That is, the annular first spacer 12, the second spacer 13, and the friction washer 14 are arranged in this order from the retaining plate 5 side between the inner peripheral portion of the retaining plate 5 and the inner peripheral portion of the flange portion 2. ing. A third spacer 15 is disposed between the inner peripheral portion of the clutch plate 4 and the inner peripheral portion of the flange portion 2. Each of these members 12, 13, 14, and 15 is formed with a hole (see FIG. 4) through which the stud pin 10 passes, so that each of the members 12 to 15 can freely rotate. prohibited.
[0026]
The first spacer 12 is a member formed in an annular shape using a steel plate such as SPHC or SPCC, and the outer peripheral portion is supported by the retaining plate 5. As shown in FIGS. 3 and 4, the first spacer 12 is formed with a plurality of ribs 12 a protruding at one side in the axial direction at a predetermined interval on the inner peripheral portion. The plurality of ribs 12a are formed so as to be positioned at an angular position shifted from the angular position where the plurality of holes 12b through which the stud pin 10 penetrates, that is, between the adjacent holes 12b.
[0027]
Similar to the first spacer 12, the second spacer 13 is formed in an annular shape using a steel plate such as SPHC or SPCC. Also in the second spacer 13, as shown in FIG. 5, a plurality of ribs 13 a that protrude to one side in the axial direction are formed at predetermined intervals on the inner peripheral portion. , Located between adjacent stud pin through holes (not shown). The second spacer 13 and the friction washer 14 are bonded to each other as shown in the drawing. Of course, these may be arranged independently without bonding. The friction washer 14 is exactly the same as the conventional structure, and is an annular resin molded product.
[0028]
As is clear from FIG. 1, the first spacer 12 and the second spacer 13 are configured so that the ribs 12a and 13a abut each other, that is, the first spacer 12 has the rib 12a facing the second spacer 13 side. The second spacer 13 is disposed such that the rib 13a faces the first spacer 12 side.
[0029]
Further, the third spacer 15 is different from the first spacer 12 only in the rib height, and the other structure is completely the same as the first spacer 12.
[0030]
In such a structure, the axial space S set by the stud pin 10, the members 12 to 15 constituting the hysteresis torque generating mechanism 11, the flange portion 2, and the input side plates 4, 5 in the free state total Is set so that T> S. Therefore, the members 12 to 15 constituting the hysteresis torque generating mechanism 11 are in pressure contact with each other by elastic deformation of the ribs 12a and 13a of the spacers 12 and 13 in the assembled state.
[0031]
In this way, the ribs 12a and 13a are formed on the first and second spacers 12 and 13, and the spacers 12 and 13 are arranged so that the ribs 12a and 13a come into contact with each other. Despite being thin, a predetermined axial space can be secured. Therefore, it is not necessary to increase the thickness of each spacer 12, 13, and the material cost can be reduced. Further, if there is a misalignment between the input shaft of the transmission and the hub 1, the misalignment causes undulation during the rotation of the hub 1 and the flange portion 2, and this is caused by the rib 12 a of both the spacers 12 and 13. , 13a can be absorbed by elastic deformation. Therefore, it is possible to prevent an excessive load from acting on the portion where the hysteresis torque generating mechanism 11 and the torsion spring are disposed, and to extend the life of the damper disk assembly. Further, in this hysteresis torque generating mechanism, the cone spring used in the conventional structure can be omitted, and the hysteresis torque can be easily adjusted by adjusting the heights of the ribs 12a and 13a of the spacers 12 and 13. can do.
[0032]
Next, the operation will be described.
[0033]
When torque is transmitted from the facing member 8 to the output-side hub 1 disposed in the center, the torque is transmitted from the facing member 8 to the clutch plate 4 and the retaining plate 5. This torque is transmitted to the hub 1 via the torsion springs 3a, 3b, 3d, 3e. At this time, the torsion spring is compressed, and a torsion angle-torsion torque characteristic corresponding to the spring characteristic is obtained.
[0034]
Further, when the torsion spring is compressed, relative rotation occurs between the clutch plate 4 and the retaining plate 5 and the hub 1. As a result, a predetermined hysteresis torque is obtained by the hysteresis torque generating mechanism 11. That is, when the clutch plate 4 and the retaining plate 5 rotate with respect to the hub 1, relative rotation occurs between the members 12 to 15 of the hysteresis torque generating mechanism 11 and the flange portion 2 and the plates 4 and 5 on the input side. As a result, a frictional force is generated in a portion where relative rotation occurs, and a certain hysteresis torque is generated.
[0035]
[Other Embodiments]
(A) In the above-described embodiment, the ribs are partially formed on the circumference in each spacer, but the shape and arrangement of the ribs are not limited. For example, like the spacer 12 ′ shown in FIG. 6, the rib 12a ′ may be continuously formed on the inner circumference of the spacer 12 ′ on the circumference.
[0036]
(B) Although the third spacer 15 is disposed between the clutch plate 4 and the flange portion 2 in the above embodiment, the third spacer 15 can be omitted. However, when the third spacer 15 is eliminated, it is necessary to form a step in the flange portion 2 to secure an axial space, or to arrange a member such as a collar.
[0037]
(C) When the damper characteristic does not require a large hysteresis torque, the friction washer 14 can be omitted.
[0038]
【The invention's effect】
As described above, according to the present invention, in the hysteresis torque generating mechanism of the damper disk assembly, it is possible to reduce the cost and to suppress the life reduction due to misalignment.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional configuration diagram of a damper disk assembly in which an embodiment of the present invention is adopted.
FIG. 2 is a front view of the damper disk assembly.
FIG. 3 is a partial sectional view of a first spacer.
FIG. 4 is a partial front view of the first spacer.
FIG. 5 is a partial longitudinal sectional view of a second spacer and a friction washer.
FIG. 6 is a partial front view of a first spacer according to another embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Hub 2 Flange part 4 Clutch plate 5 Retaining plate 11 Hysteresis torque generation mechanism 12, 12 '1st spacer 13 2nd spacer 14 Friction washer 15 3rd spacer

Claims (8)

An input side plate to which torque from the engine is input, an output side plate that is relatively rotatable on the input side plate and that outputs the torque, and an elastic member that elastically connects the two plates in the rotational direction. A hysteresis torque generating mechanism that generates a hysteresis torque at the time of relative rotation of the two plates.
A rib projecting in the axial direction is formed on the inner periphery , and an annular and flat plate-shaped first spacer disposed between the two plates,
An annular and flat plate-like second spacer disposed between the plates so as to protrude in the axial direction and have a rib formed on the inner periphery , and press-contacted with the first spacer;
Hysteresis torque generating mechanism of damper disk assembly equipped with   The hysteresis torque generating mechanism for a damper disk assembly according to claim 1, wherein the first spacer and the second spacer are disposed so that the ribs are in pressure contact with each other. The ribs of the first and second spacers are their respective is partially formed on a circle periphery, hysteresis torque generating mechanism of the damper disk assembly according to claim 1 or 2. The ribs of the first and second spacers are their respective is formed continuously on a circle periphery, hysteresis torque generating mechanism of the damper disk assembly according to claim 1 or 2.   The hysteresis torque generating mechanism for a damper disk assembly according to any one of claims 1 to 4, further comprising a friction washer arranged between the output side plate and the second spacer in the axial direction.   The hysteresis torque generating mechanism for a damper disk assembly according to claim 5, wherein the side surfaces of the second spacer and the friction washer are bonded to each other.   The hysteresis torque generating mechanism for a damper disk assembly according to any one of claims 1 to 6, wherein an outer peripheral portion of the first spacer is supported by the input side plate. The input side plate has a first plate and a second plate disposed on both sides of the output side plate,
The first spacer and the second spacer are disposed between the first plate and the output side plate,
A rib protruding in the axial direction is formed between the second plate and the output side plate, and further includes an annular plate-shaped third spacer that presses against the second plate and the output side plate.
A hysteresis torque generating mechanism for a damper disk assembly according to any one of claims 1 to 7.

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