JPS5958233A - Clutch disc - Google Patents

Abstract

PURPOSE:To absorb vibration caused by fluctuation in torque by using a ring- shaped elastic body for producing spring force in the peripheral direction as one of elastic bodies, and taking a large helix angle of thread at the first step of a torsion spring constant. CONSTITUTION:A spring 13 comprises a spring body 13a curved like a ring and projections 13b, 13c bent at both ends of the spring body 13a in such a manner as to project out in the opposite direction. The spring body 13a is concentrically disposed on the outer periphery of a clutch hub 11. One projection 13b is inserted in a through hole 11d mounted on a flange 11b, and the other projections 13c is inserted in a through hole 5b mounted on a side plate 5. A spring constant of the spring 13 is set smaller than that of a torsion spring 6. The spring 13 is set at the first step of a torsion spring constant of a clutch disc.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a clutch disk for a clutch device.

As a conventional clutch disc, there is one shown in FIG. 1, for example. That is, the clutch shaft 1 is spline-coupled (!r, bamboo serration coupling) so that the rotating direction is integrated, and the inner hub body 2 is fitted externally to the inner hub body 2, and the inner hub rest 2 is fitted onto the inner hub body 2. An outer hub body 3 is spline-coupled (or serrated-coupled) so that relative rotation is rotational within a limited range, and a drive plate 4 is disposed facing each other across a flange 3b provided on the outer periphery of the outer hub body 3.
It is composed of a side plate 5 and two sets of elastic bodies 6 and 10 having different spring constants. A facing 7 is fastened to both outer surfaces of the drive plate 4 with rivets 8, and the drive plate 4 and a side plate 5 having a smaller diameter are interconnected by a pin 9. A torsion spring 6, which is a first elastic body, is installed in a plurality of openings 12 aligned between both plates 4 and 5 and the outer hub body 3 and provided at equal angles on the circumference. It is.

Further, some of the outer splines 2b of the inner hub body 2 have thinner teeth than other outer splines 2a. A coil spring 10, which is a second elastic body, is compressed between the body 6 and the inner spline 3a. This coil spring 10 provides a first stage with a very low torsional spring constant with low damping friction torque, and the torsion spring 6 provides a second stage with a large torsional spring constant with a moderate damping friction torque. .

When the torque of the engine (lli) is input to the facing 7, this is transmitted to the torsion spring 6 via the drive plate 4 and the side plate 5,
Furthermore, the torsional torque input from the flange 6b causes the outer hub body 3 to rotate within a limited range against the spring force of the coil spring 10, and the inner spline 3a of the outer hub body 6 When the torsion spring 6 comes into contact with the outer spline 2a of the engine, the torsion spring 6 begins to bend due to the torsional torque of the engine. The torsional constant of is set in three stages.

) to absorb vibrations caused by torque fluctuations.

However, in such a conventional clutch disc, the hub is constituted by an inner hub body 2 and a separate outer hub body 3, and both hub bodies 2 and 3 are connected by a loose spline connection. Between the outer spline 2b of the inner hub body 2 with thinner teeth and the inner spline 3a of the outer hub body 3 that opposes the outer spline 2b, which is coupled to allow relative rotation at an angle,
Coil spring 10 with its principal axis of elasticity oriented in the tangential direction.
It had a structure that interposed the For this reason, the coil spring 10 must be interposed in the spline joint where the circumferential dimension cannot be secured very large, and therefore the torsion angle of the first stage of the torsion spring constant during torque transmission is There was a problem in that it could not be made large enough to absorb vibrations caused by torque fluctuations.

This invention was made by focusing on such conventional problems, and includes a drive plate and a side plate facing both sides of the seven langes of the clutch hub, and at least one of the drive plate and the side plate. 7. In the clutch disc in which a plurality of elastic bodies having different spring constants are provided between the flange and the flange, one of the elastic bodies is formed in a ring shape so as to generate a spring force in the circumferential direction. and locking one end of the elastic body to either the drive plate or the side plate,
By locking the other end to the hub side, the purpose is to increase the torsion angle of the first stage of the torsion spring constant while ensuring the strength of the drive plate, etc., thereby solving the above problem.

The present invention will be explained below based on the drawings.

FIGS. 2 to 4 are diagrams showing one embodiment of the present invention.

1. First, to explain the structure, reference numeral 11 shown in FIG.
A spline 11a (or serration) is provided to be fitted to the outer periphery, and seven flange 11b is provided on the outer periphery. A flange 11b is provided on the radially outer side of the clutch hub 2.
A drive plate 4 and a side plate 5 are installed facing each other on both sides of the drive plate.

The drive plate 4 is made up of two large and small ring-shaped plates 4a and 4b that are fixed together with rivets (route in the figure), and a friction material is provided on both sides of the outside of the large diameter plate 4a. A certain facing 7 is fixed with rivets (route in the figure). The side plate 5 has approximately the same outer diameter as the small diameter plate 4b of the drive plate 4, and is connected and fixed to the pin 9 with a predetermined distance between the side plate 5 and the drive plate 4. ing. The drive plate 4, the side plate 5, and the flange 11b of the clutch hub 11 are provided with a plurality of openings 12 that are formed at equal angles in the circumferential direction and are aligned to force the pair. Each of the openings 12 is equipped with a torsion spring 6, which is an elastic body, and which allows relative rotation of a predetermined angle in the circumferential direction between the drive plate 4 and the side plate 5 and the 7 flange 11b. This torsion spring 6 sets the second stage of the torsion spring constant of this clutch disc.

Note that the hole 11c of the flange 11b, which forms a part of the opening 12, has a length in the circumferential direction that is smaller than the holes 4c and 5a of the drive plate 4 and the side plate 5, which also form a part of the opening 12. Increase the size accordingly. The difference between these two holes is the first torsional spring constant of this clutch disc.
This is the rotation angle (rotational displacement amount) at each stage.

Furthermore, the flange 11b of the clutch hub 11 and the side plate 5 are provided with the flange 11b at the same position in the radial direction from the axis of the clutch shaft, as shown in FIG.
and a through hole 11d passing through the side plate 5 in the axial direction,
5b are respectively provided, and these through holes 11d and 5b are provided with
Each end of a ring-shaped elastic spring 16 as shown in FIG. 4 is inserted and attached with its diameter expanded. That is, the spring 13 is composed of a spring body 13a that is curved into a ring shape, and protrusions 13b and 13c that are bent at both ends of the spring body 13a so as to protrude in opposite directions.

The spring body 13a is arranged concentrically around the outer periphery of the clutch hub 11, and one protrusion 13b is attached to the flange 1.
Insert the through hole 11dK provided in 1b, and insert the other protrusion 1
3c into the through hole 5b provided in the side plate 5.

The spring constant of this spring 13 is set smaller than the spring constant of the torsion spring 6. This spring 13 sets the first stage of the torsional spring constant of this clutch disc.

In FIG. 3, 14 is a friction spring, 15 is a friction plate, 16 is a friction washer, and 17 is a friction ring, all of which are ring-shaped.

Next, the effect will be explained.

FIG. 2 shows a state in which no torque is transmitted to the clutch disc. In this case, the spring 13 that sets the first stage of the torsional spring constant of the clutch disc is not attached between the flange 11b of the clutch hub 11 and the side plate 5 with its diameter expanded. Spring 13
Due to the spring force, the side play 1-5 is in a pre-clockwise displaced position relative to the clutch hub 11, as shown in FIG. The spring 6 is compressed in each of the holes 4c and 5a of the drive plate 4 and the side plate 5 and is in its most expanded state.

Here, when torque from the engine side is input to the acing 7, the transmitted torque passes through the drive plate 4 and the side plate 5, and then passes through two types of control bodies 6 and 13 with different spring constants to the clutch. input to the axis. In this case, the parts of this clutch disc that are capable of relative rotation are the parts connected by the spring 16 that sets the first stage of the torsional spring constant, and the torsion spring 6 that also sets the second stage of the torsional spring constant. 2 with the part to do
However, since the spring force of the torsion spring 6 is stronger than that of the spring 16, first the spring 16 with a low spring constant is elastically deformed, and the drive plate 4 and The side plate 5 and the clutch hub 11 rotate relative to each other. Then, as the torque input to the facing 7 increases, the facing 7 rotates relatively until one end in the circumferential direction of the hole 11c provided in the flange 11b abuts one end of the torsion spring 6.

In this case, the spring 13 is formed in a ring shape, and the spring force when the spring 16 is expanded in diameter provides the first stage of the torsional spring constant of the clutch disc. For example, as shown by the solid line in the graph of FIG. 5, the torsion angle (the area is indicated by S) can be made large, and the rate of increase in torsion torque can be set extremely slowly. Furthermore, when the input torque fluctuates, the drive plate 4, side plate 5, and clutch hub 11 vibrate relative to each other in the circumferential direction by the amount of the torque fluctuation, but the spring force of the spring 13 acts as a damping force. , whereby the fluctuating torque can be absorbed.

As mentioned above, since the region S of the first stage of the torsional p spring constant is wide, the torsion spring 6 and the flange 1
1 can be suppressed, and the generation of the impact noise that occurs at this time can be significantly reduced.

Furthermore, the transmitted torque increases, and the hole 11 of the flange 11
When one side of c comes into contact with one end surface of the torsion spring 6, the torsion spring 6, which provides the second stage of torsional spring constant, is compressed and elastically deformed.

Therefore, when the transmitted torque becomes large, the drive plate 4 and side plate 5 are connected to the clutch knob 11 via the torsion spring 6 having a large spring constant, so that the large torque input from the engine side is reliably transferred to the clutch shaft. can be transmitted to.

Thus, as shown in FIG. 5, according to the present invention, since the torsion angle of the first stage of the torsion spring constant can be set large, vibrations in a wide range due to torque fluctuations can be absorbed. Therefore, the torque input from the engine side can be smoothly transmitted to the clutch shaft 1 side. In Figure 5, the vertical axis is the torsional torque (kg
-7F+), the horizontal axis shows the torsion angle (angle), and the graph shown by dashed-dotted lines a and b in the figure is
The torsional characteristics of a conventional clutch disc are shown.

Furthermore, the spring 13 may be provided across between the drive plate 4 (n!l) and the clutch hub 11 side.
Furthermore, it goes without saying that the spring 13 may be attached with its diameter reduced in advance.

As explained above, in this invention, a drive plate having facings on both outer surfaces and a side plate integral with the drive plate are provided on both sides of the flange provided on the outer periphery of the clutch hub. ,
In the clutch disc, a plurality of elastic bodies having different spring constants are provided between at least one of the drive plate and the side plate and the flange to allow relative rotation at a predetermined angle in the circumferential direction. One of the bodies uses an elastic body formed in a ring shape so as to generate a spring force in the circumferential direction, and one end of the elastic body is attached to either the drive plate or the side plate. It is fixed to one end, and the other end is fixed to the hub side. Therefore, the torsion angle of the first stage of the torsion υ spring constant can be set to a large value, thereby making it possible to reliably absorb vibrations caused by torque fluctuations on the engine side. Therefore, it is possible to suppress the impact between the component parts due to fluctuations in the input torque, and it is possible to suppress the generation of impact noise at this time.

[Brief explanation of the drawing]

Fig. 1 is a partially omitted front view of a conventional clutch disc, Fig. 2 is a partially omitted front view showing an embodiment of the present invention, and Fig. 3 is a partially omitted front view of a conventional clutch disc.
4 is a perspective view of an elastic body which is a component of the present invention, and FIG. 5 is a graph showing a specific example of the relationship between the torsion angle and the torsional shift torque in the present invention. 4... Drive plate, 5... Side plate,
5b... Through hole, 6... Torsion spring (elastic body), 11... Clatchinop, 11b... Flange, 11d-12-... Through hole, 12... Opening, 13... ...Spring (elastic body), 13a...Spring body, 131), 13(!...
Protrusion Patent Applicant Nissan Motor Co., Ltd. Representative Patent Attorney Tetsuya Mori Patent Attorney Yoshiaki Naito Patent Attorney Shimizu Regular Patent Attorney Takeru Kajiyama

Claims (1)

[Claims] A drive plate with facings on both outer sides and a side plate integral with the drive plate are arranged on both sides of a flange provided on the outer periphery of the clutch hub, and some of the drive plate and the side plate are provided with facings. In a clutch disk, a plurality of elastic bodies having different spring constants are provided between at least one side and the flange, allowing relative rotation at a predetermined angle in the circumferential direction,
One of the elastic bodies is formed into a ring shape so as to generate a spring force in the circumferential direction, and one end thereof is locked to either the drive plate or the side plate, and the other end is locked to the hub. A clutch disc characterized by being locked on the side.