JPH026268Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention mainly relates to a friction clutch for an automobile.

Prior Art Generally, torsion rubber or torsion springs are installed between a clutch hub, a disc plate, and a sub-disc plate.
Conventionally, these springs have been used that are compressed when the hub side and both disk plates are twisted.

By the way, as is well known, in order to take measures against vibration and noise in the drive system, it is desirable that the torsion angle at the time of the above-mentioned torsion be large. In other words, the springs used should have a large amount of deformation, but if conventional springs that act in the compression direction are used, an appropriate guide must be provided to prevent buckling. However, since this results in friction with the guide, it is actually extremely difficult to increase the torsion angle using springs that act in the compression direction.

Purpose of the invention The purpose of the present invention is to provide a clutch disc that has a larger torsion angle than conventional clutch discs and can easily take measures against vibration and noise in the drive system.

Configuration of the Invention The clutch disk of the present invention is configured as follows in order to achieve the above object.

In other words, the clutch hub, the disc plate, and the sub-disc plate are assembled on the same rotating shaft so that they can be relatively angularly displaced, and the torque around this rotating shaft is transmitted from both disc plates to the clutch hub, and vice versa. It includes two transmission directions:

and a pair of slits formed in a predetermined arc shape with the rotation axis as the center at mutually corresponding positions of the two disk plates and arranged symmetrically with respect to the axis of the rotation axis; A pin is assembled to be movable along both slits, an arm is formed to protrude in the radial direction from the clutch hub, and the arm is stretched between the arm and both pins, and the arm is suspended between the arm and both pins, and It is provided with a tension spring, only one of which is elastically deformed in response to a tensile force, which is determined by the direction of torque transmission between the disk plate and the disk plate.

Effects of the invention The present invention uses a tension spring as an elastic body that elastically deforms during torque transmission between the clutch hub and both disc plates and determines the torsional rigidity of the clutch disc. The torsional angle between the plate and the plate can be greatly expanded, making it easier to take measures against vibration and noise in the drive system.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings.

A clutch hub 1 is spline-fitted onto the shaft of an input shaft (not shown) in a transmission, and four arms 2A and 2B are integrally formed and protrude radially at intervals of 90 degrees. A disk plate 4 and a sub-disk plate 5 are disposed on both sides of the arms 2A, 2B with friction washers 3, 3 interposed therebetween, and both disk plates 4, 5 are arranged on the outer periphery thereof. They are joined by rivets 6 to 6 at the sides. Further, on the outer periphery of the disk plate 4, a plurality of disk springs 7 to 7 are provided along the circumferential direction.
are fixed, and facings 8 are fixed on both sides of these springs 7, respectively.

Slits 9, 9 are bored in an arc shape at corresponding positions on the disc plate 4 and the sub-disc plate 5, and both slits 9 are formed in the clutch hub 1.
It is placed symmetrically between the two. And the above 4
Of the book arms 2A and 2B, a stopper pin 10 that can slide along both slits 9 is attached to each tip of the left and right arms 2B and 2A in FIG. On the other hand, the upper and lower arms 2B, 2B in the same figure are always locked to each end of both slits 9, and there is a gap between each pin 11A, 11B that is attached to be slidable along both slits 9. A tension spring 1 is always stretched in a free state.
Two pieces of each of 2A and 12B are tied together.

The clutch disc of this example is formed as described above and operates as follows.

When transmitting engine torque, both disk plates 4 and 5 are rotated counterclockwise in FIG. 1 by the rotational torque from the facing 8. At this time, due to the mutual angular displacement (torsion) between the clutch hub 1 and both disk plates 4 and 5,
Since both slits 9 are also relatively displaced, two of the four springs 12A, 12B at one diagonal position are each extended by the tensile force. On the other hand, both springs 12B, 12B at the other diagonal position
Since B and 11B are slidably displaced along the slit 9, they do not receive any tensile force and are held in a free state. As the above angular displacement progresses, the pins 11 of both springs 12A, 12A on the extended side
A and 11A each hit the stopper pin 10,
Thereafter, it becomes a well-known stop torque and is transmitted to the clutch hub 1 side.

Contrary to the above, when decelerating, clutch hub 1
When torque is transmitted from the clutch hub 1 side and both disc plates 4 and 5, both springs 12 at diagonal positions on the opposite side
B, 12B is expanded, and both springs 12A, 1 on the other side
2A is held free. When the pins 11B and 11B of both springs 12B and 12B on the extension side respectively hit the stopper pin 10, a stopper torque is generated as described above and both the disk plates 4 and 5
is transmitted to the facing 8 via the .

In this way, in this example, when torque is transmitted between the clutch hub 1 side and both disk plates 4 and 5 sides, the angle at which the pins 11A and 11B of the springs 12A and 12B on the extended side hit the stopper pin 10 is Maximum twist angle. Therefore, according to the diagram, the maximum torsion angle is approximately 40 degrees, which is four times larger than the conventional one (approximately 10 degrees), and this results in a reduction in the drive system. Vibration and noise can be effectively reduced.

Note that each tension spring 12A, 12B may be made of an elastic material such as rubber.

[Brief explanation of the drawing]

Figure 1 is a plan view of the clutch disk of this example, Figure 2
The figure is a sectional view taken along the line A--A in FIG. 1. 1...Clutch hub, 2A, 2B...Arm,
4...Disc plate, 5...Sub-disc plate, 12A, 12B...Tension spring.

Claims (1)

[Claims for Utility Model Registration] A clutch hub, a disc plate, and a sub-disk plate are assembled on the same rotational axis so as to be able to be relatively angularly displaced, and torque around this rotational axis is transmitted from both disk plates to the clutch hub. In a clutch disk that includes two transmission directions, one when the rotation is made and the other when the rotation is a pair of slits arranged symmetrically with respect to the axis of the shaft; a pin displaceably displaceable along each of the slits; and an arm formed to protrude radially from the clutch hub; , which are stretched between the arm and the two pins, and when torque is transmitted between the clutch hub and the disc plates, only one of them is elastically deformed by the tensile force determined by the direction of the transmission. Clutch disc with tension spring.