JPS6128100Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a damper disk suitable for a clutch disk of a motor clutch.

For example, in conventional clutch discs used in automobiles, an annular friction material is placed between the flange of a spline hub on the output shaft and the clutch plate and retaining plate on the input side (facing side) that sandwich the flange. When the clutch plate and retaining plate are twisted relative to the hub flange, slipping occurs on the surface of the friction material, and the hysteresis torque generated by the slipping is used to absorb torque vibration. It's summery. However, conventional products use a combination of cone springs, friction washers, friction plates, etc. as friction materials, which increases the number of parts and increases costs. Also, since cone springs have a small amount of deflection, there is a problem in that the elastic repulsion force of the cone spring decreases even if the friction material wears slightly, and as a result, as the friction material continues to be used, the friction force of the friction material and the resulting hysteresis torque decrease. is reduced, and the vibration absorption effect is also reduced.

In order to solve the above-mentioned conventional problems, this invention
The idea is to apply compressive force to the friction material by utilizing the elastic deformation of one or both of the inner periphery of the clutch plate and the inner periphery of the retaining plate.In the present invention, radial slits are formed in the inner periphery of the clutch plate and/or the inner periphery of the retaining plate. The slitted inner circumferential portion is formed into a tapered shape, thereby increasing the amount of deflection of the inner circumferential portion. Next, embodiments will be described with reference to the drawings.

FIG. 1 is a schematic longitudinal cross-sectional view, and FIG. 2 is a schematic view of a portion viewed from the − arrow in FIG. 1. In FIG. It is held between an annular clutch plate 5 and a retaining plate (a pair of side plates). A facing 7 is connected to the outer periphery of the clutch plate 5 via the cushioning plate 7. Reference numeral 8 denotes a torsion spring (compression spring) extending in the circumferential direction of the clutch disk, which is attached to the flange 3 and both plates 5,
Both plates 5 and 6 are connected to the flange 3 via a spring 8. Both plates 5 and 6 are rigidly connected to each other at their outer peripheries via stop pins (not shown).

An annular friction material 9 is interposed between the inner circumference of the clutch plate 5 and the flange 3, and an annular friction material 11 and a friction material are interposed between the inner circumference 10 of the retaining plate 6 and the flange 3. plate 12
(another friction material) is interposed. The friction plate 12 is in contact with the retaining plate 6, and the friction material 11 is in contact with the flange 3. Note that the friction material 11 and the plate 12 can also be formed as one piece. The inner circumferential portion 10 of the retaining plate 6 is tapered so that the inner circumferential edge 13 occupies the position closest to the flange 3, and only the portion near the inner circumferential edge 13 is connected to the friction plate 12.
It is in pressure contact with the Further, the above-mentioned pressure contact force is obtained by greatly elastically deforming the inner circumferential portion 10. Other parts, namely the plate 12, the friction material 11, the inner circumference of the flange 3, the friction material 9, and the clutch plate 5.
The inner periphery of the inner periphery 10 is flat even before assembly, and does not act as a source of pressure contact force in the assembled state shown in the figure, and only the elastic repulsive force of the inner periphery 10 is applied to the surface of each part. As shown in FIG. 2, radial slits 15 are provided in the inner circumferential portion 10 from the inner circumferential edge 13 toward the outer circumference, and the provision of the slits 15 allows the inner circumferential portion 10 to be largely elastically deformed. . The retaining plate 6 is preferably formed of a spring material, and its springiness can also be increased by heat treatment. In the illustrated embodiment, the inner circumferential edge 13 of the retaining plate 6 is separated from the outer cylindrical surface by a slight annular gap as shown in FIG. are in contact. Therefore, the plate 6 is supported by the hub 2 via a stop pin (not shown) and the plate 5.

When the clutch is connected, when the facing 7 is pressed against the flywheel by a pressure plate (not shown), the input torque from the flywheel is applied to the clutch plate 5 and the retaining plate via the facing 7 and the cushioning plate 7'. 6, and is transmitted from both plates 5 and 6 to the flange 3, hub 2, and output shaft 1 via spring 8.
It is transmitted to. In this case, since the spring 8 is compressed, both plates 5, 6 are twisted relative to the flange 3, and the twist angle D increases in accordance with the transmitted torque T, as shown in FIG. Furthermore, due to the above twisting, slippage occurs on the surface of the friction material 9 and the surface of the friction material 11 or friction plate 12, and the frictional force caused by the slippage causes hysteresis h in the torque-torsion characteristics shown in FIG.
occurs. In addition, the present invention can stabilize the hysteresis h throughout the period of use. In other words, the above-mentioned frictional force corresponds to the pressing force against the friction materials 9, 11, etc., but according to the present invention, the pressing force is obtained by the large elastic deformation of the inner circumferential portion 10 of the retaining plate as described above, so that it can be used for a long period of time. Even if the friction materials 9, 11, etc. are worn out due to use, the amount of wear is very small compared to the amount of elastic deformation of the inner peripheral portion 10, and the elastic repulsive force of the inner peripheral portion 10, in other words, the friction materials 9, The pressing force against No. 11 etc. does not change significantly. Therefore, the frictional force of the friction materials 9, 11, etc. hardly changes, and the hysteresis torque h always maintains a substantially constant value.

As explained above, according to the present invention, the retaining plate 6 is replaced with the conventional cone spring.
Since the slitted tapered inner circumferential portion 10 is used as the pressure contact force generation source, the number of parts can be reduced and costs can be reduced, and the hysteresis torque h can be stabilized throughout the usage period to achieve a predetermined torque vibration absorption effect. can be obtained. Furthermore, by providing the slits 15, the cooling effect on the friction plate 12 and other parts can be enhanced.

In the case of embodying the present invention, the tapered inner periphery with slits may be provided only on the clutch plate 5, or may be provided on both plates 5 and 6.

[Brief explanation of the drawing]

FIG. 1 is a schematic vertical cross-sectional view of the embodiment, FIG. 2 is a schematic view of the portion viewed from the - arrow in FIG. 1, and FIG. 3 is a graph showing operating characteristics. 1... Output shaft, 2... Spline hub, 3...
Flange, 5, 6...Clutch plate and retaining plate (side plate), 8...Torsion spring, 9, 11...Friction material, 10...
...Inner circumference, 15...Slit.

Claims (1)

[Scope of utility model registration request] The outward flange of the spline hub connected to the output shaft is sandwiched between a pair of side plates into which torque is introduced to the outer periphery, and the flange and both side plates are connected by a torsion spring.
Annular abrasive materials are interposed in a compressed state between the inner peripheries of both side plates and the flanges, radial slits are formed in the inner periphery of at least one of both side plates, and the slits A damper disk characterized in that the inner circumferential portion thereof is formed into a tapered shape so that it approaches a flange as it goes toward the inner circumferential side.