JPH02134415A - Damper disk - Google Patents

Abstract

PURPOSE:To secure a wide twist angle as well as to prevent any anomalous noise from occurring by installing a subplate in space between a hub flange and each side plate at both sides via a friction material, while setting up a weak inner circumferential torsion spring in each inner circumferential window hole of the flange and the subplate and two strong outer circumferential torsion springs in outer circumferential window holes of the flange and each plate, respectively. CONSTITUTION:When each side plate 4 is twisted to a spline hub 1, the side plate 4 and a subplate 10 are solidly twisted to a flange 2 of the spline hub 1, and an inner circumferential torsion spring 20 is compressed between an inner circumferential window hole 17 of the subplate 10 and an inner circumferential window hole 16 of the flange 2, whereby low hysteresis torque is generated by a friction material 11. When an outer circumferential window hole 23 of the flange 2 comes into contact with an edge of an outer circumferential torsion spring 30A, an outer circumferential torsion spring 30B is compressed between an outer circumferential window hole 27 of the side plate 4 and the outer circumferential window hole 23 of the flange 2, whereby high hysteresis torque is generated by the friction material. With this constitution, a wide twist angle is secured and, what is more, prevention of any anomalous noise is well promoted.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a damper disk in which two torsion springs are arranged in series within one torsion spring arrangement window hole.

(Prior art) Generally, in a damper disk having two or more stages of torsional characteristics, for example, a window hole for the first stage is formed on the inner circumferential side, a weak torsion spring for the first stage is arranged, and A window hole for the second stage is formed, and a strong torsion spring for the second stage is arranged. Since the torsion springs are arranged along the rotational direction, one outer circumferential spring or two parent-child springs are usually arranged in one outer circumferential hole. Therefore, the torsional characteristics of the two-stage opening are as shown in Fig. 5. As shown by the broken line, the torsional rigidity increases, making it difficult to scale over a wide range of torsional angles.

On the other hand, in order to obtain a wide range of torsional angles, a system was developed in which two torsion springs were arranged in series within one outer peripheral window hole, and a float movable in the rotational direction was interposed between both torsion springs. However, there are problems such as float rattling, and to ensure two-stage hysteresis torque, for example, the flange of a spline hub is divided into inner and outer circumferences.
There is a problem with the durability of the flange (objective of the invention) The object of the present invention is to maintain a high strength of the flange of a spline hub while ensuring a wide twist angle and preventing abnormal noise during running. .

(Technical Means for Achieving the Object) In order to achieve the above object, the present invention arranges sub-plates between the flange of the hub and the side plates on both sides thereof, A friction material is disposed between the plate and the side plate, an inner circumferential window hole is formed in the flange and the sub-plate, and a weak inner circumferential torsion spring is disposed within the inner circumferential window hole so as to be freely compressible in the rotational direction. , an outer circumferential window hole is formed in each of the sub-plate and the side plate, and two strong outer circumferential torsion springs are arranged in series within the outer circumferential window hole so as to be freely compressible in the rotational direction, and these ends are located between the inner and outer circumferential springs. Intermediate walls that are held by the edges either directly or through sheets are integrally formed with the sub-plate, and the rotational direction edges of the outer peripheral window holes of the side plate and the sub-plate and the rotational direction edges of the outer peripheral spring opposing these are formed integrally with the sub-plate. are in contact with each other directly or through a sheet, and a gap for the first stage torsion angle is provided between the rotational direction edge of the outer circumferential window hole of the flange and the rotational direction edge of the outer circumferential torsion spring opposing this.

(Function) When the side plate twists relative to the spline hub during engine operation, first the side plate and sub-plate twist integrally relative to the flange of the spline hub.
The inner circumferential torsion spring is compressed between the edge of the inner circumferential window hole of the sub-plate and the edge of the inner circumferential window hole of the flange. At this time, low hysteresis torque is generated by the friction material between the sub-plate and the flange.

When the edge of the outer circumferential window hole of the flange and the rotational edge of the outer circumferential torsion spring come into contact and the gap between them becomes O, the edge of the outer circumferential window hole of the side plate and the edge of the outer circumferential window hole of the flange contact each other. The outer circumferential torsion spring is compressed between. At this time, since the intermediate wall of the outer peripheral window hole of the sub-plate is interposed between the inner and outer peripheral torsion springs, the sub-plate is twisted in the same direction as the side plate at a torsion angle half that of the side plate. Also, high hysteresis torque is generated due to the friction of both the friction material between the sub-plate and the flange and the friction material between the sub-plate and the side plate.

(Embodiment) Fig. 2 is a vertical cross-sectional partial view (cross-sectional view taken along the line ■-■ in Fig. 1) of a two-stage torsional damper disk to which the present invention is applied. A flange 2 extending radially outward is integrally formed on the flange 2, and a pair of side plates 4 are disposed on both sides of the flange 2 at intervals in the axial direction. Both side plates 4 have cushioning plates 5 at their outer peripheral ends.
The input end facings 6 are fixed to both sides of the cushioning plate 5. The facing 6 is held between, for example, a flywheel and a pressure plate, and rotational force is input thereto.

A sub-plate 10 is arranged between each side plate 4 and flange 2, respectively. An annular first-stage friction material 11 for generating a small hysteresis torque is arranged between both side surfaces of the flange 2 and each sub-plate 10 and press-contacted thereto, while between each sub-plate 10 and each side plate 4. An annular second-stage friction material 12 for generating a large hysteresis torque is placed in pressure contact with these members. Both sub-plates 10 are integrally connected by a plurality of sub-bins 9, and the sub-pins 9 are arranged at a portion of an intermediate wall 26, which will be described later.

A plurality of first stage inner peripheral window holes 16 are formed on the inner peripheral side of the flange 2, and second stage window holes 23 are formed on the outer peripheral side. The sub-plate 1 corresponds to the inner peripheral window hole 16 of the flange 2.
0 are formed with inner peripheral window holes 17, and these inner peripheral window holes 16.1
A weak first-stage inner circumferential torsion spring 20 is disposed within the spring 7 so as to be freely compressible in the rotational direction.

Peripheral window holes 27 and 25 are formed in the side plate 4 and the sub-plate 10 in correspondence with the second stage outer peripheral window hole 23 of the flange 2, respectively.

The front view of FIG. 1 shows the damper disk in a stopped state cut away in stages, and both ends of the inner circumferential torsion spring 20 in the rotating direction are connected to the inner circumferential windows 16 and 17 of the flange 2 and the sub-plate 10. are in contact with both edges in the rotating direction.

The outer peripheral window holes 23, 25, 27 for the second stage are formed long in the rotation direction, and in particular, the outer peripheral window holes 25, 25, 27 of the sub-plate 10 are formed long.
An intermediate wall 26 is formed integrally with the sub-plate 10 at an intermediate portion in the rotational direction. Mutually corresponding outer peripheral window holes 23.
25.27 has two strong outer circumferential torsion springs 30A, 30
B are arranged in series in the rotational direction and compressible in the rotational direction.

In the stopped state as shown in Fig. 1, the side plate 4
The front edge 27a of the outer circumferential window hole 27 and the front edge 25a of the outer circumferential window hole 25 of the sub-plate 10 are connected to the front outer circumferential torsion spring 30.
A, the rear end edge 27b of the outer peripheral window hole 27 of the side plate 4 and the sub-plate 1
The rear end edge 25b of the outer circumferential window hole 25 of No. 0 is in contact with the rear end edge of the rear outer circumferential torsion spring 30B via the seat 29. Further, the front and rear edges of the intermediate wall 26 are provided with front torsion springs 30, respectively.
A and the front edge of the rear torsion spring 30B are in contact with each other via the sheet 29.

On the other hand, the length in the rotational direction of the outer peripheral window hole 23 of the flange 2 is equal to the length of the outer peripheral window hole 23 of the side plate 4 and the sub-plate 10.
．． 25. In other words, both front and rear edges 23a and 23b of the outer circumferential window hole 23 of the flange 2 are longer than the sheet 29 at the front edge of the front outer circumferential torsion spring 30A and the rear edge of the rear outer circumferential torsion spring 30B, respectively. It faces the sheet 29 with a gap corresponding to the twist angle θl in between.

Next, the effect will be explained. When the side plate 4 twists forward in the rotational direction relative to the flange 2 due to engine torque fluctuations, for example from the state shown in FIG. The first stage inner torsion spring 20 is compressed between the rear edge of the inner circumferential window hole 17 of the sub-plate 10 and the front edge of the inner circumferential window hole 16 of the flange 2 shown in FIG. The first stage friction material 11 generates a small hysteresis torque for absorbing torque fluctuations. That is, in the range of θ1 in FIG. 5, the torsion characteristics are as shown by the solid line.

When the above-mentioned torsion angle reaches θ1, the front edge of the front outer circumferential torsion spring 30A contacts the front edge 23a of the outer circumferential window hole 23 of the flange 2 in FIG. 1 via the two sheets. Then, as the side plate 4 is further twisted, the rear end edge 2 of the outer peripheral window hole 27 of the side plate 4 is twisted as shown in FIG.
7b compresses the rear outer circumferential torsion spring 30B, and compresses the front outer circumferential torsion spring 30A in series via the intermediate wall 26.

Both torsion springs 30A and 30B are compressed equally, for example, because they have the same strength.

Therefore, when the outer circumferential torsion springs 30A and 30B are compressed, the sub-plate 10 has an intermediate wall 26 that is connected to both springs 30.
Since it is held between A and 30B, it rotates forward by a rotation amount (torsion angle θS) that is half of the rotation amount (torsion angle θ2) of the side plate 4, as shown in FIG. Therefore, the total hysteresis torque is the sum of the torque caused by the second stage friction material 12 and the torque caused by the first stage friction material 11.

That is, in FIG. 5, θ2 is the torsional angle range in which the side plate 4 twists while compressing the outer circumferential torsion springs 30A and 30B, and θS is the range in which the sub-plate 10 is twisted while the side plate 4 is twisted by θ2.

(Effects of the Invention) As explained above, according to the present invention: (1) Two outer circumferential torsion springs arranged in the outer circumferential window hole 27 etc. are arranged in series, resulting in low torsional rigidity and wide torsional angle. can be achieved, and has the effect of preventing abnormal noises such as muffled noise when driving at low speeds.

(2) Since the intermediate 926 integrated with the sub-plate 10 is interposed between the two outer peripheral torsion springs 30A and 30B in series, both torsion springs 30A and 30B are compressed when the springs are compressed, compared to the conventional float body type. The posture does not become unstable, and stable torsional rigidity can be demonstrated.

(3) Connect the two outer peripheral torsion springs 30A and 30B in series with the sub-plate 10 with the intermediate wall 26, and connect the sub-plate 10 and the flange 2 as well as the sub-plate 1.
Friction material 11 and 12 between 0 and side plate 4, respectively.
, it is possible to easily obtain two stages of hysteresis torque of a desired magnitude, and the first stage can have extremely small hysteresis torque and extremely low torsional rigidity.

Furthermore, compared to the conventional structure in which the flanges of the spline hub are separated into inner and outer peripheries to provide first-stage torsional characteristics, the durability of the spline hub flanges can be maintained.

[BRIEF DESCRIPTION OF THE DRAWINGS] FIG. 1 shows a damper disk to which the present invention is applied,
A front view (corresponding to arrow 1 in Fig. 2) showing each member cut away in stages, Fig. 3 is a sectional view taken along the line ■-■ in Fig. 1 showing the state when the engine is stopped, and Fig. 4 shows the FIG. 5 is a sectional view of the same part as FIG. 3 showing the second stage torsion state, and FIG. 5 is a torsion characteristic diagram. 1... Spline hub, 2... Flange, 4...
...Side plate, 10...Sub plate, 11.
...Friction material for 1st stage, 12...Friction material for 2nd stage, 16
．． 17... Inner circumference window hole, 20... Inner circumference torsion spring, 2
3.25.27...Outer window hole, 26...Intermediate wall, 3
0A, 30B...Outer periphery torsion spring patent applicant Daikin Seisakusho Co., Ltd. Figure 1

Claims (1)

[Claims] A sub-plate 10 is arranged between the flange 2 of the hub 1 and the side plates 4 on both sides thereof, and friction materials 11 and 12 are provided between the sub-plate 10 and the flange 2 and between the sub-plate 10 and the side plate 4, respectively. place,
Inner peripheral window holes 16 and 17 in the flange 2 and sub-plate 10
At the same time, a weak inner circumferential torsion spring 20 is arranged in the inner circumferential window holes 16 and 17 so as to be freely compressible in the rotational direction, and outer circumferential window holes 23, 25, and 27 are provided in the flange 2, sub-plate 10, and side plate 4, respectively. At the same time, two strong outer circumferential torsion springs 30A are formed in the outer circumferential window holes 23, 25, 27.
, 30B are arranged in series so as to be freely compressible in the rotational direction, and an intermediate wall 2 is located between the outer circumferential torsion springs 30A and 30B and is sandwiched by the edges thereof either directly or through a sheet.
6 is integrally formed on the sub-plate 10, and the rotational direction edges of the outer circumferential windows 27, 25 of the side plate 4 and the sub-plate 10 and the rotational direction edges of the outer circumferential springs 30A, 30B opposing these are directly or sheet-coated. abut through the
1 between the rotational direction edge of the outer circumferential window hole 23 of the flange 2 and the rotational direction edge of the outer circumferential springs 30A and 30B facing thereto.
Damper disc with gap for step torsion angle.