JPS5929155Y2 - Adhesive clutch disk - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a bonded clutch disc in which a pair of clutch facings are bonded to both sides of a cushioning plate.

The present applicant has previously disclosed in Japanese Patent Application No. 54-96720 that a pair of clutch facings are bonded to both sides of a cushioning plate having an uneven waveform in the circumferential direction using an adhesive in the actual area of the cushioning plate. We are proposing a type clutch disc.

This adhesive clutch disc solves various problems of the conventional clutch disc with riveted structure.The thickness of the clutch facing can be reduced and the clutch disc is not used with rivets, which reduces the weight of the clutch disc. This has the advantage of reducing the moment of inertia of the gearbox, reducing the shift force during gear changes, and reducing manufacturing costs.

The adhesive clutch disc described above has a structure as shown in FIG.

That is, in FIG. 1, reference numeral 1 denotes a hub of a clutch disk, and the hub 1 is provided with a spline 1a on its inner periphery and a flange portion 1b on its outer periphery.

A drive plate 4 and a side plate 5 are arranged on both sides of the flange portion 1b with friction washers 2 and 3 in between, and these plates 4 and 5 are integrally connected by a stop pin 6.

Each stop pin 6 passes through a notch 1c that is opened at the outer peripheral edge of the flange portion 1b, and the length of these notches in the clutch hub circumferential direction is larger than the diameter of the stop pin 6. The configuration is such that relative rotation between the clutch hub and the drive plate 4 is allowed by the difference.

Opposing square holes 7 and 8 are formed in the drive plate 4 and the side plate 5, respectively, square holes 9 aligned with these square holes are also formed in the flange portion 1b, and the torsion spring 10 is inserted into these square holes 7. , 8 and 9, and thereby the plates 4 and 5 are fitted across the flange portions 1b.
K is elastically coupled and compressed when the clutch plate 1, drive plate 4, and side plate 5 rotate relative to each other, thereby acting as a torsional damper.

A large number of cushioning plates 12 are concentrically riveted to the outer peripheral edge of the drive plate 4 by rivets 11, and continuous annular clutch facings 13 and 14 are attached to both sides of the cushioning 120.

Each cushioning plate 12 has an uneven waveform in the circumferential direction, and as shown in FIG.
a, 12b, and the inclined leg portion 12d between these flat actual image portions.
, 12e.

Then, the flat protruding surface portion 12 of the cushioning plate 12
Clutch facings 13 and 14 to which a and 12b correspond
0 each is glued to the inner surface.

When bonding the clutch facing of the clutch disk having the above-described structure to the cushioning plate, the flat surface 12a of the cushioning plate 12 is bonded as shown in FIGS. 3 and 4.

12b or apply adhesive to the surfaces of the clutch facings 13 and 14 to be bonded, and
After positioning and holding the cushioning plate 12 between the clutch facings 15 and 14, the cushioning plate 12 is inserted between the annular flat adhesive jigs 15 and 16 similar to the clutch facing, and a load is applied to the adhesive jig from the outside in the direction of the arrow. Then, as shown in FIG. 4, the adhesive sheet 1/-) 12 is compressed until it becomes almost flat, and heated in this state to harden the adhesive.

However, in such a conventional clutch facing bonding method, the flat bonding jig 15,
The entire facing surface is pressed uniformly by the opposing planes 160, while the flat surfaces 12a t 12b of the cushioning plate 12 are deformed into a concave shape and separated from the surface of the facing as shown in FIG. 5, so that the adhesive layer There was a problem in that the adhesive became thick and full adhesive strength could not be obtained in the concave central part, which is the main area.

In general, a clutch disc transmits rotational power through frictional force on each surface of the clutch facing.

For this reason, a shearing force is generated in the circumferential direction at the bonded portion between the cushioning plate 12, which acts as a buffer when the clutch is connected, and the clutch facing 13, 14, and a force that tends to separate the bond is generated.

At this time, if the adhesion is insufficient due to insufficient adhesion strength of the adhesive or a defect in the adhesion process, a problem arises in that the adhesive part peels off.

The present invention was developed by focusing on these conventional problems, and involves providing a plurality of protrusions or pawls protruding from the flat surface of the cushioning plate to which the clutch facing is attached, and attaching these protrusions to the clutch facing. The purpose of this invention is to solve the problem of separation between the cushioning plate and the clutch facing, which had occurred as a result of poor adhesion as described above.

The present invention will be explained below with reference to the drawings.

6 to 10 show an example of a clutch disc according to the present invention.

In this example, as shown in FIG. 6, the actual portion 12a of the cushioning plate 12.

A plurality of wedge-shaped protrusions 19 are provided to protrude from the adhesive surface 18 of 12b.

The protrusion 19 has a right-angled surface 2 that is substantially perpendicular to the adhesive surface 18.
0 is located in the radial direction of the clutch facing.

The protrusion 19 may have its right-angled surfaces 20 facing each other as shown in FIGS. 6 and 7, or may have its right-angled surfaces 20 facing each other as shown in FIGS. 8 to 10. It may also be placed.

By providing such protrusions 19 on the adhesive surface 18, they are bitten and fixed into the clutch facings 13 and 14, respectively, as shown in FIG.

FIG. 10 shows a right-angled surface 2 that is approximately perpendicular to the adhesive surface 18.
0 shows another arrangement example of the wedge-shaped protrusions 19 located in the radial direction of the clutch facing.

The wedge-shaped protrusion 19 described above has a surface 20 that is perpendicular to the facing circumferential direction (rotation direction), and since this surface is bitten into the facing, it receives shearing force on this surface, resulting in the above-mentioned insufficient adhesion. It has the effect of compensating for

11 and 12 show cushioning plate 1
An example is shown in which a wedge-shaped protrusion 19 is arranged on the adhesive surface 18 of the actual image portion 12a t 12b of No. 2 so that its right-angled surface 20 is perpendicular to the radial direction.

In this example as well, when the clutch disk rotates at high speed, a radial shearing force acts on the fixed surfaces of the fencing and cushioning plates, so that the shearing force acts to compensate for the lack of adhesive strength.

13 and 14 show cushioning plate 1
A nail-shaped protrusion 2 is attached to the adhesive surface 18 of the actual image portion 12at12b of 2.
An example in which 1 is cut and raised to protrude is shown.

15 and 16 show the right-angled surface 22 of the claw-like projection 21.
An example is shown in which they are arranged in combination at right angles to the circumferential direction or the radial direction.

According to this example, the adhesive strength can be compensated for the shear forces acting in each direction.

FIGS. 17 and 18 show an example in which the claw-like projections 21 are arranged in a prismatic shape.

This allows one piece to compensate for adhesive strength against shearing forces in multiple directions.

19 and 20 show a cylindrical or needle-like projection 23
An example is shown in which the adhesive surface 18 of the actual image portion 12a of the cushioning plate 12 is provided protrudingly.

21, 22 and 23 show clutch facings 13 on both sides of a cushioning plate 120 with protrusions.
, 14 are shown.

In the bonding method shown in FIGS. 3, 4, or 8, the protrusions 12a and 12b tend to curve and deform, and the central portion of the actual image part and the bonding surface of the clutch facing tend to separate from each other. There is a problem in that the protrusions do not penetrate completely into the adhesive surface, and the protrusions cannot be expected to have a sufficient effect.

The adhesion method to eliminate this problem is shown in Fig. 21 and 2.
Shown in Figure 2.

In the example shown in FIG. 21, one of the clutch facings 14 is pressed against the adhesive surface of the protrusion 12b of the cushioning plate 12 by one adhesive jig 16, and at the same time a pin-shaped suppressing element provided on the other adhesive jig 15 is pressed. 24 through a hole 25 provided in the other clutch facing 14 to the protruding portion 12.
The adhesive is cured while applying adhesive pressing force by directly pressing it against the surface opposite to the adhesive surface of b.

In the example shown in FIG. 22, the non-adhesive surface of the protrusions 12a, 12b of the cushioning plate 12 opposite to the adhesive surface and the clutch facings 14, 13 facing away from this surface
With an intervening object such as a spacer 26 inserted between the clutch facings 13 and 140, a pressing force is applied from the outside of both the clutch facings 13 and 140 to pierce the projections 23 and bond them with adhesive.

As shown in FIGS. 21 and 22, the protrusion 12a,
A suppressing element 24 or a spacer 26 is placed on the non-adhesive surface side of 12b.
By directly pressing the adhesive, etc., it not only prevents adhesion failure caused by the curved deformation of the protrusion described above, but also
It is possible to prevent the adhesive from flowing out from the adhesive side of the protruding portion through the cutout holes 27 of the protrusions 19, 21, 23, etc. to the non-adhesive side.

FIG. 23 shows a protrusion 12a that is generally used to prevent adhesive from spilling out from the adhesive side to the non-adhesive side through the cutout hole 27 of the protrusion and having an adverse effect.

A state in which adhesive tape 28 is attached to the non-adhesive surface side of 12b to close the protrusion cutout hole 2T and adhere the adhesive tape 28 is shown.

As described above, according to the present invention, a protrusion is provided on the adhesive surface of the clutch facing of the cushioning plate, and this protrusion is bitten into the clutch facing to fix it with adhesive. When power is transmitted by friction, the receiver has the effect of absorbing the shearing force generated at the bonded portion between the facing and the cushioning plate, and also being able to compensate for insufficient bonding strength or defective bonding.

[Brief explanation of the drawing]

Figure 1 is a longitudinal sectional view of a clutch disc with a clutch facing bonded to a cushioning plate, Figure 2 is a partial front view of the clutch disc shown in Figure 1, and Figures 3 to 5 are conventional clutch facing bonding methods. FIG. 6 is a front view showing the first example of the clutch disc cushioning plate according to the present invention, FIG. 1 is an enlarged sectional view taken along the line ■-■ in FIG. 6, and FIG. 8 is a wedge-shaped projection. 9 is an enlarged sectional view similar to FIG. 7 showing another example of the arrangement; FIG. 9 is a partial sectional view showing a state in which the protrusion on the cushioning plate shown in FIG. 11 to 20 are front views and enlarged partial sectional views of the cushioning plate showing various examples of the present invention, and FIG. Figure 23 is an explanatory diagram showing various aspects of the bonding method between the clutch facing and the cushioning plate. 1... Hub, 2, 3... Friction washer , 4... Drive plate, 5...
...Side plate, 6...Stop pin,
7, 8, 9... Square hole, 10... Torsion spring 11... Rivet, 12...
...Cushioning plate, 12a, 12b...
・Protrusion portion, 13, 14 ・・Clutch facing, 15, 16 ・・Adhesive jig, 17 ・・・
... Hole, 18 ... Adhesive surface, 19 ... Protrusion, 20 ... Right angle surface, 21 ... Protrusion,
22...Right angle surface, 23...Protrusion, 24
...Pin-shaped suppression element, 25 ... Hole, 2
6... Spacer, 27... Cutout hole, 2
8...Adhesive tape.

Claims (1)

[Scope of utility model registration request] In an adhesive type clutch disc in which a pair of clutch facings are bonded to both sides of a cushioning plate, a protrusion is provided on the adhesive surface of the clutch facing of the cushioning plate, and the protrusion is attached to the cushioning plate with the protrusion actually open on the clutch facing. An adhesive clutch disc characterized by adhesive clutch facing.