JPH06129445A - Clutch disk - Google Patents

Abstract

PURPOSE:To secure a clutch disk that is able to prevent any drag of this clutch disk at the time of releasing by means of simple constitution. CONSTITUTION:This clutch disk is provided with a clutch hub 2 equipped with a flange 2b extending in the radial direction, a disk plate 3 and a sub plate 4 rotatably set up relatively in the flange 2b. In addition, this clutch disk 1 is installed in an interval between the output side 11 of a prime mover where facing 5 is attached to the disk plate 3 via a back plate 10, and the input side of a driving force transmission means. This clutch disk is composed of installing an interconnecting hole 10a connecting both these output and input sides 11 and 12 of the prime mover and the driving force transmission means is installed in the back plate 10, and also a throttle part 10b for inducting air to the output side 11 of the prime mover from the input side 12 of the driving force transmission means, via the interconnecting hole 10a as well.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clutch disk in a drive shaft system such as an automobile clutch.

[0002]

2. Description of the Related Art As a clutch disk having an elastic body arranged in a drive shaft system, a clutch disk described in JP-A-62-75139 is known as a prior art. The conventional clutch disk is provided with a clutch hub and a disk plate and a sub plate that rotate relative to the clutch hub. The clutch disk is provided on the outer peripheral portion of the clutch hub and the disk plate and the sub plate. An elastic body composed of a plurality of elastic members is arranged in the window. Facing is attached to the disk plate via a back plate. Furthermore, the inner peripheral portion of the clutch hub is provided with a spline that fits with the input shaft of the transmission.

Here, when the transmission of the rotational force between the prime mover of the vehicle and the transmission is interrupted, the release bearing is operated to release the biasing force of the diaphragm spring of the clutch cover to the pressure plate to fly the prime mover. It prevents the torque of the wheel from being transmitted to the clutch disk.

However, even if the urging force of the diaphragm spring is released, the clutch disk does not immediately separate from the flywheel due to the frictional resistance generated between the spline of the clutch hub and the input shaft of the transmission. There is a problem of dragging the clutch disk.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide a clutch disk capable of preventing the clutch disk from dragging at the time of release with a simple structure.

[0006]

In order to solve the above-mentioned problems, in a first aspect of the present invention, a clutch hub having a flange extending in a radial direction and a clutch hub arranged so as to be rotatable relative to the flange. A clutch disk provided with a disk plate and a sub-plate, wherein a facing is attached to the disk plate via a back plate, and the clutch disk is disposed between an output side of a prime mover and an input side of a driving force transmission means. A communication hole that communicates the output side of the prime mover with the input side of the driving force transmission means, and further, the back plate from the input side of the driving force transmission means to the output side of the prime mover through the communication hole. The clutch disk is characterized by being provided with a throttle portion for introducing air.

According to a second aspect of the present invention, in the back plate, the facing mounting surface and the disc plate mounting surface have a step in the rotation axis direction of the clutch disk, and the throttle portion absorbs the step. A clutch disk satisfying claim 1 characterized in that it is a stepped portion.

According to a third aspect of the present invention, the throttle portion is
An inlet port for sucking air from the input side of the driving force transmitting means and an outlet port for discharging air sucked from the inlet port to the output side of the prime mover are provided. The clutch disk is located inward in the radial direction of the clutch disk, and the clutch disk satisfying claim 1 is provided.

[0009]

According to the above means, the air introduced from the input side of the driving force transmitting means to the output side of the prime mover by the communication hole is a space formed by the throttle side by the output side of the prime mover and the clutch disk. Since the positive pressure due to air is generated in the space, if the biasing force of the diaphragm spring on the pressure plate is released when the clutch is released, the clutch disk receives the positive pressure and immediately the prime mover. Can fly away from the flywheel.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A description will be given below with reference to the drawings showing the present invention.

FIG. 1 is a front view of a clutch disk 1 of the present invention, and FIG. 2 is a sectional view taken along line 2-2 of FIG. The clutch disk 1 includes a clutch hub 2, and a disk plate 3 and a sub plate 4 which are rotatable relative to the clutch hub 2 are provided on both sides of the clutch hub 2.
The disk plate 3 and the sub plate 4 are connected by a connecting pin 6 so that they cannot rotate relative to each other.
A back plate 10 having facings 5 on both sides is attached to the disk plate 3 and the sub plate 4 by the connecting pin 6. The disk plate 3 and the sub plate 4 are provided with windows 3a and 4a, respectively, in which elastic bodies are arranged. Further, the clutch hub 2 has a spline 2a on its inner peripheral portion that engages with the input shaft of the transmission, and a flange 2 on its outer peripheral portion.
b is provided, and the flange 2b is provided with a protrusion 2c. The elastic body 7 is composed of an elastic rubber 8 and a resin sheet 9 adhered to the elastic rubber 8, and an end portion of the elastic body 7 is elastically engaged with a protrusion 2c of the clutch hub 2 in a recess 9a of the resin sheet 9. Repulsively engaged.

Here, when the clutch disk 1 is installed between the prime mover of the vehicle and the driving force transmitting means, the back plate 10 has an output side 11 of the prime mover and an input side 12 of the driving force transmitting means. It is provided with a communication hole 10a communicating with each other, and further, at the portion 10e connecting the mounting surface of the facing 5 of the back plate 10 and the mounting surface of the disk plate 3, the output side 11 of the prime mover and the clutch disk 1 are connected. A throttle portion 10b for introducing air into the formed space is provided. In this embodiment, the narrowed portion 10b is the flat plate portion 10c on the outer peripheral side of the back plate 10.
And a slope connecting the inner peripheral side flat plate portion 10d,
While the clutch disk 1 is rotating, the inner circumference of the clutch disk 1 is gradually increased in the rotational direction of the clutch disk 1 so that air is easily moved from the right side to the left side of the clutch disk 1 in FIG. It wraps around to the side. That is, the air intake port 10f of the throttle 10b.
In comparison with the above, the intake air outlet 10g is located radially inward of the clutch disk 1.

The operation of the clutch disk 1 will be described with reference to FIGS. When the clutch is gradually started to be engaged, the pusher plate forming the clutch cover (not shown), which is a structure other than the clutch disc 1, receives the biasing force from the diaphragm spring, which is also a structure of the clutch cover, and the clutch plate shown in FIG. Is pushed to the left at, and is crimped with a flywheel of a rotating prime mover (not shown). As a result, the disk plate 3 and the sub plate 4 connected to the facing 5 start to rotate while sliding with respect to the flywheel, and the relative rotation of the disk plate 3 and the sub plate 4 with respect to the clutch hub 2 occurs. The elastic body 7 is generated and compressed between the protrusion 2c of the clutch hub 2 and the windows 3a and 4a of the disk plate 3 and the sub plate 4. The rotational force of the prime mover is transmitted from the disc plate 3 and the sub plate 4 to the clutch hub 2 via the elastic body 7, and the rotational torque transmitted to the transmission gradually increases.

Here, when the clutch disk 1 is rotated in a state where it is pressed against the flywheel by receiving the urging force from the pressure plate, the air near the communication hole 10a is generated by the communication hole 10a in FIG. 1 from the right side to the left side, and further to the space formed by the output side 11 of the prime mover and the clutch disk 1 by the throttle portion 10b. Due to the movement of the air, a positive pressure is generated in the space formed by the output side 11 of the prime mover and the clutch disk 1, and a force for urging the clutch disk 1 to the right in FIG. 2 is generated. Due to the urging force of the diaphragm spring, the clutch disc 1 remains pressed onto the flywheel. Here, when the clutch is operated and the biasing force from the pressure plate is released, the output side 11 of the prime mover and the clutch disk 1 are released.
The clutch disk 1 can be easily separated from the flywheel by being biased by the positive pressure generated by the air generated in the space formed by (1) and (2). Therefore, according to the present invention, it is possible to prevent the clutch disk from being dragged when the clutch is released with a simple structure in which only the communication hole and the throttle portion are provided in the back plate which is the structure of the clutch disk.

The shape of the throttle portion of the present invention is not limited to the above-mentioned embodiment, and various modifications may be made within the scope of the present invention.

[0016]

As described above, according to the clutch disk of the present invention, a positive pressure is generated in the space formed by the output side of the prime mover and the clutch disk by the throttle portion provided on the back plate, and the clutch disk At the time of release, the clutch disc can be easily separated from the flywheel of the prime mover, and the clutch disc can be prevented from being dragged. Therefore, an uncomfortable gear noise or a gear shift defect generated at the time of shifting the transmission or the like can be eliminated.

Further, since the back plate has a simple structure in which only the communication hole and the throttle portion are provided, the weight and cost of the clutch disk can be reduced.

[Brief description of drawings]

FIG. 1 is a front view of a clutch disk according to the present invention.

FIG. 2 is a sectional view of a clutch disk according to the present invention.

[Explanation of symbols]

1 clutch disk 2 clutch hub 2b
Flange 3 Disc plate 4 Sub plate 5 Facing 10 Back plate 10a Communication hole 10b
Throttle portion 11 Output side of prime mover 12 Input side of driving force transmission means 10f Inlet port 10g Discharge port

Claims (3)

[Claims] 1. A clutch hub having a flange extending in a radial direction, a disk plate and a sub plate arranged so as to be rotatable relative to the flange, and a facing is attached to the disk plate via a back plate. In the clutch disk arranged between the output side of the prime mover and the input side of the driving force transmission means,
The back plate is provided with a communication hole for communicating the output side of the prime mover with the input side of the driving force transmission means, and further, the back plate is provided with a communication hole of the prime mover from the input side of the driving force transmission means through the communication hole. A clutch disk characterized by having a throttle portion for introducing air to the output side. 2. The back plate, wherein the facing mounting surface and the disc plate mounting surface have a step in the direction of the rotation axis of the clutch disk, and the throttle section is a stepped section that absorbs the step. A clutch disk satisfying claim 1. 3. The throttle unit includes an intake port for sucking air from an input side of the driving force transmitting means, and an exhaust port for discharging air sucked from the intake port to an output side of the prime mover. The outlet is located radially inward of the clutch disk as compared with the inlet.
Clutch disk to satisfy.