JPS59140923A - Clutch disc - Google Patents

Abstract

PURPOSE:To achieve friction damping by placing a sub-plate supported by bearing between a pair of drive plates facing at both sides of plate section integral with hub and said hub then coupling each plate through a compression spring. CONSTITUTION:A sub-plate 14 is arranged between drive plates 2, 2' arranged at both sides of plate section 1b integral with a hub 1 and said hub 1 then supported rotatably around the hub 1 through a bearing 15. Windows 6, 7 for containing a compression spring 3 functionable at first stage are formed through both plates 14, 1b. Windows 8-11 and 20, 21 for containing compression springs 4, 5 functionable at second and third stage are formed through each plate 2, 2', 14 and 1a where windows 9, 11 are made wider in circumferential direction than the windows 8, 10 while the windows 20, 21 are made to have same circumferential width than the windows 8, 10. Then low and high frictional members 16, 17 are placed respectively between the plates 14, 1a and 14, 2 and 2'.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a clutch disk used in an automobile power transmission device, etc.

Clutch discs are designed to absorb the torsional vibration kq effect caused by torque fluctuations in the engine, etc., and prevent undesirable vibrations or noise from occurring in the power transmission system. For example, a clutch disc with low torsional rigidity can be used to absorb torque fluctuations by compression spring, and for a large input torque fluctuation range, a high torsional rigidity compression spring can be used to sufficiently absorb torque fluctuations. has been done. This kind of conventional clutch disc is the first
, as shown in Figure 2, the boss part 1a and the plate part 1b'l
a hub l, a pair of drive plates 2.2' facing each other on both sides of the plate portion 1b, and a plurality of pairs of drive plates 2.2'i that are elastically connected to each other so as to be relatively rotatable. The compression springs 3, 4, 5... are all provided, the windows 6 and 7 for accommodating the compression springs 3 have the same width in the circumferential direction, and the windows 8 and 9 for accommodating the compression spring 4 have N circumferences, respectively. A dimensional difference Gl is given in the direction, and the compression spring 5't is
- When the engine torque is transmitted to the clutch disc, one of the drive plates 2 is connected by the pin 13. The other drive plate 2' tries to rotate together with the compression spring 3.
, 4, '5 are sequentially compressed to change the torsional rigidity in multiple stages. Note that F is a friction washer which is a friction damping means.

However, in such a conventional clutch disc, the windows 6, 7° 8, 9, 1 for housing the compression springs 3, 4.5
0 and 11 were all formed on the plate portion 1b of the hub 1 and the drive plates 2, 2', which resulted in the following drawbacks.

(1) Although torsional stiffness can be changed, h\lA# and performance cannot be changed accordingly.

(2) Since the compression spring 3, which acts in the first stage, is compressed over the entire stroke when the clutch disc is operated, it may break due to increased stress.

(3) The space for arranging the pressure material self-spring 3 becomes larger, the space for arranging the compression springs 4 and 5 that act after the second stage becomes smaller, and the torsional angle in the region of high torsional rigidity is reduced.

The present invention addresses the above-mentioned drawbacks of the conventional technology, and can change the friction damping capacity according to the torsional rigidity, and also improves the
This was done with the purpose of providing a clutch disc that can prevent loss of torque and increase the total torsion angle in the range of stiffness. As shown in FIG.
, 2', the sub-plate 14 that engages with the outer periphery of the boss portion 1a via the bearing 15't- The sub-plate 14 and the plate portion 1b of the hub 1 are attached to the sub-plate 14 and the plate portion 1b of the hub 1.
2.2, which accommodate the compression springs 3 acting in the first stage on these windows 6, 7 and the drive plate) 2.2.
', g8, 9, 10, 11, 20, 21 are formed on the sub plates 14, 14 and the plate portion 1b of the hub 1 to accommodate pressure springs 4, 5 that act after the second stage, and these windows Of these, windows 9 and 11 of hub 1 are windows 9 and 11 of drive play 1-2 and 2' g8 and 10 and sub-brake) 14
．． 14' window added, formed wider in the circumferential direction than 21,
At least one of the windows 20, 21 of the sub-plates 14, 14 corresponding to g8°10 of the drive brakes 2, 2' is formed with the same circumferential amount -1[-, and these windows 8, 9, 10, 11, 2L).

21 respectively. Compression spring acting in the third stage4.
5, a low friction member 16 serving as a first friction damping means is interposed between the plate portion 1b of the hub l and the sub-plate 14, and a low-friction member 16 serving as a first friction damping means is interposed between the sub-plate 14 and the drive plates 2, 2'. This is because a friction member 17 is interposed as a second male friction reducing means.

In the example shown in the recess, the sub-plate 14 is attached to the hub 1
plate part 1b and both drive brakes) 2.2'
6 in between, one of these sub-brakes) 14
A cylindrical bearing receiving portion 14a is formed and overhanging the bearing receiving portion 14a.
It is rotatably mounted on the outer periphery of the boss portion 1a via a dry bearing 15 attached to the inner periphery of the cough bearing link holder 14a. There is a low J1 between the plate portion lb of the hub so that the hub rotates integrally with the plate portion lb.
#The rubbing member 16 and a disc spring 16a having a small spring constant are completely sandwiched and connected by a pin 18. and said bottle 1
8 is a plate portion 1b of the hub 1 with a desired play angle θ.
The bottle is inserted into an arcuate bottle receiving hole 19 formed in the plate portion 1b so as to engage with the bottle. FIG. 5 is a developed sectional view clearly showing the relationship between the bottle 18 and the bottle receiving hole 19.
A play gap Gl corresponding to the play angle θ is provided between the bottle receiving hole 19 and one end of the bottle receiving hole 19. Further, a compression spring 3' (I-accommodating windows 6 and 7 are sub-brakes) 14 and 14' that act in the first stage is formed at a position diametrically opposed to the plate portion 1b of the hub 1 so as to have the same width in the circumferential direction. The compression spring 3 is accommodated within these windows 6 and 7 in a compressed state by a length LtK so as to have a desired initiality ML. The windows 8 and 9 that accommodate the compression spring 42 that acts in the second stage are arranged so that the window 9 formed in the plate portion 1b of the hub 1 is larger than the width 8 formed in the drive plate 2゜2'. A compression spring 4 is housed in the windows 8, 9 in a compressed state to a length L2 so as to have a desired initial load, and the compression spring 4 and the plate portion 1b of the pub 1 are connected to each other. The window 8 is located between one edge of the formed window 9.
, 90, a play gap G2 is provided which is substantially equal to the play gap G1. The windows 10 and 11 housing the compression springs 5 acting in the third stage of the housing are connected to the drive plates 2, 2' and the brakes of the hub 1 by g8.
. At the same time, there is a play gap PjA G larger than the play gap G2 due to the dimensional difference between the compression spring 5 and one end edge of the window 11 formed in the plate portion 1b of the hub 1.
3 is provided. G4 is drive plate 2゜2
This is the clearance for allowing the stroke of the pin 13 that is connected. Further, a friction washer with a small coefficient of friction is used for the low M friction member 16 serving as the first friction damping means, and the low friction member 16 rotates with the rotation of the sub-plate 14, and A friction washer having a thicker coefficient of friction than the low friction member 16 is used for the high friction member 17 which is designed to generate low friction with the first plate HIS1b and is the second friction damping means. The high friction member 17 is a live plate 2.2'.
As the sub-plate 14 rotates, it rotates to generate high friction with the sub-plate 14. In addition, 21 is the second. These are windows formed in the sub-plate 14 to accommodate the compression springs 4 and 5 that act in the third stage, respectively.
The window 21 that accommodates the compression spring 4 that operates in the third stage is formed to have approximately the same size as the window 8 provided in the drive plate 2, 2', and the window 21 that accommodates the compression spring 5 that operates in the third stage. is a window 11 provided in the plate portion 1b of the hub 1.
are formed to be approximately the same size.

Next, the operation of the clutch disc having the above configuration will be described.

When torque fluctuation occurs from the constant torque operating state shown in FIG. 5, the windows 8 of the drive plates 2, 2' and the windows of the sub-plate 14 are formed to be approximately the same in the circumferential direction. Therefore, these drive plates 2.2' and ≠
The sub-plate 14 rotates substantially integrally with the sub-plate 14 via the compression spring 4, and has a drive play (2.2') as shown in FIG.
Sub plate 14, low friction part 16, AM' friction member 17
continues until the bottle 18 engages with one end edge of the bottle receiving hole 19 of the plate portion 1b of the knob 1, that is, through the play gap Gl of 8'tJ. Therefore, the compression spring 3 acting in the first stage is 1. L1='G
1=L4 is compressed to a length of L4 to generate a first-stage spring reaction force, and the low friction member 16 and the plate portion 1 of the nozzle 1
Due to the relative rotation with b, a low friction is generated, and a vibration absorption and damping effect of the first stage (area A) shown in FIG. 9 is generated.

In this case, the bearing 15 interposed between the boss s1 a and the circumference of the sub-plate 14
The friction between the outer periphery of the drive plate 2, 2' and the subplate 14 is reduced, and the subplate 14 is
rotates with its inner periphery supported by the bearing 15, so the inclination of the rotating surface is small, and the valley friction members are biased uniformly in the circumferential direction, so the friction force by each friction member is stable. Since the desired low friction should be generated by the low friction member 16, the desired low friction can be obtained with high accuracy.
Uneven wear of the sub-plate 14 etc. can be prevented. In this case, the compression springs 4 and 5 that act in the second and third stages also rotate according to the drive play) '2, 2', etc., but the compression springs 4 and 5 that act in the second stage and the window 1 with one edge of 9
Play gap 02 approximately equal to Tanioma@@d play gap G1
Since force balls exist, the compression +f that acts in the second stage
The spring 4 is only held against one end edge of the window 9 of the plate s1b of the hub 1 and is not compressed. Furthermore, since there is a play gap G3 larger than the play gap G2 between the compression spring 5 acting on the third step and one end edge of the window 11, the compression spring 5 acting on the third step is MjJ play hGak
It is only shortened to the length Gs and is not compressed again. Furthermore, when the drive plates 2 and 2' are rotated from the state shown in FIG. 6, the compression spring 4 acting in the second stage is activated by these drive plates 2 and 2' as shown in FIG. The second stage spring curve +it is generated by being pressed to the length L5, and high friction is generated by the relative rotation between the drive plate 2.2' and the high friction member 17, and the second stage shown in FIG. After the stage (region B), the vibration-absorbing effect is completely reduced. And in this case,
The compression spring 5 acting in the third stage also acts on the drive plate 2.
, 2', but there is the play gap G3 between the compression spring 5 acting in the third stage and one end edge of the window 11.
There is a play gap G5 that is obtained by subtracting all 02 from The compression spring 5 only engages one end edge of the window 11 and is not compressed. Then, when the drive plate is rotated from the state shown in Fig. 7 to 2.2"k, the drive brakes will turn as shown in Fig. 8).
2, 2' by 2nd. The compression springs 4, 5 acting in the third stage simultaneously each have a length L6.

L7 is compressed to generate a third stage spring reaction force, and high l# friction is generated by the relative rotation between the drive plates 2', 2' and the high friction member 17, and the third stage shown in FIG. This causes the entire vibration reduction effect of one neck (region C) to occur. Note that the gap G4 provided between the pin 13 and the plate portion 1b of the hub decreases to G6 and G7 as the compression springs at each stage are adjusted in axis, and this abuts against the plate portion lb and acts as a stopper. Three stages of pressure motion are completed.

As explained above, the present invention includes a hub having a boss portion and a plate portion, a pair of drive plates facing the plate portion, and a plurality of compression springs elastically connecting the hub and the drive plates so as to be movable relative to each other. In the clutch disc tilted downward, between the plate portion of the hub and at least one of the drive plates,
A sub-plate roller is fixed to the plate portion of the hub at a desired angle of play, and is attached to the outer periphery of the boss portion via a bearing in a rotational manner, and a first stage is attached to the sub-plate and the plate portion of the hub. The windows accommodating the compression springs acting at M are formed with the same width in the circumferential direction, and these windows are provided with the first
Said drive plate and suffix accommodate compression springs that act in stages.

The plates and the plate portions of the knobs are fully formed with windows that accommodate pressure springs that act in the second and subsequent stages, and among these windows, the windows of the knobs are located further in the circumferential direction than the windows of the drive plate and subplate. At least one of the windows of the subplate is formed wide and corresponds to the window provided in the drive plate, and is formed with the same circumferential direction, and the compression applied to these windows after the second stage is While accommodating the spring, a low single friction member serving as the first shore damping means is present between the plate portion of the hub and the sub-plate, and a low single friction member is provided between the center sub-plate and the drive plate. Since the 20th friction reduction stage, the Takama 1 sensing member, is fully interposed, there is an effect as described in the arrow.

(11 The compression spring acting in the first stage is pressed until the sub-plate engages with the plate part of the hub, and the dove plate engages with the plate part of the hub L:) Therefore, the stress applied to the compression spring acting in the first stage becomes significantly smaller than that in the past, and it is therefore possible to eliminate switching behavior caused by increased stress.

(2) The space for arranging the compression spring that acts in the first stage becomes smaller, and the space for arranging the compression spring that acts in the second and subsequent stages is increased to increase the torsion angle? can be increased.

(3) Since the harmonic vibration between the hub boss part and the inner periphery of the drive plate and the tongue plate becomes smaller and the variation in friction reduction force becomes smaller, the low single vibration characteristic especially in the first stage can be obtained very well. At the same time, wear on the inner periphery of each plate is prevented.

(4) The tilting of the rotating surface of the sub-plate is reduced, so
In order to bias each friction member in the circumferential direction - +?
[While generating vibration, there is no uneven wear on the surfaces of sub-plates, etc.

4.1 Figure 1 is a plan view of a conventional clutch disc, Figure 2 is a plan view of the n-11 & Ir plane of Figure 1, and Figure 3 is a plan view of the clutch disc of the present invention, W14 diagram. is the ■-■ accident prevention diagram in Fig. 3, Fig. 5 is a developed cross-sectional view of the clutch disc in the non-operating state, and Fig. 6 is the developed-f open state in which the compression spring acting in the first stage is fully compressed. -, Fig. 7 is a developed cross-sectional view of the compression spring k EE 1tAd acting in the second stage, Fig. 8 is a developed cross-sectional view of the compression spring fully compressed in the third stage, and Fig. 9 This is a characteristic diagram.

1...Hub, 1a...Boss part, 1b...Plate part, 2.2'...Drive plate, 3, 4, 5...
・Compression spring, 6, 7, 8. '9,10. Total: window, 14
...Subplate, 15...Bearing, 16...
・Low-friction section, 17... Misfortune, rub section piece, rib, 21...
·window.

Claims (1)

[Claims] (1) A hub having a homogeneous portion and a plate portion, a pair of drive plates facing each other on both sides of the plate portion, and a plurality of compression springs that elastically connect the hub and the drive plates such that they can rotate relative to each other. In the complete clutch disc, a sub-grate, which is located between the plate portion of the hub and at least one of the drive plates and engages with the plate portion of the hub with a desired angle of play, is provided via a ball ring. is rotatably attached to the outer periphery of the boss portion, and the sub-plate and the plate portion of the hub are formed with windows having the same width in the circumferential direction for accommodating the compression spring that acts in the first stage. The compression acting in the first stage is fully accommodated, and the drive plate, sub-plate, and hub plate portions have a second
A window is formed for accommodating the compression spring that acts after the step, and among these windows, the window of the top is also formed to be wider in the circumferential direction than the window of the drive plate and the sub-plate, and the window provided in the drive plate is At least one of the windows of the sub-plate corresponding to #C, having the same width in the circumferential direction as each other,
- While these windows accommodate compression springs that act after the second stage, a first frictional reduction phenomenon is formed between the plate portion of the hub and the sub-plate. All low friction members are involved. Furthermore, the clutch disc is characterized in that a high friction member serving as a second friction wave plate means is interposed between the sub-plate and the drive plate "1".