KR20170003029A - Clutch disc for car - Google Patents

Abstract

The present invention relates to a clutch disc of an automobile, and a hole (H1) for increasing a cushion stroke is formed in a body (110) of a cushion plate (100) supporting both side paces. Therefore, occurrence of judder can be prevented by suppressing the occurrence of vibration with respect to the axial load fluctuation under the condition that the parallelism of the pressing element is poor when the clutch is connected.

Description

Clutch disc for car < RTI ID = 0.0 >

The present invention relates to a clutch disc of an automobile, and more particularly to a clutch disc of an automobile that transmits engine power to a transmission input shaft.

Generally, a clutch is used in automobiles to arbitrarily block and connect between the engine and the transmission. In an automatic transmission vehicle, a torque converter using a fluid is used as an intermediary for power transmission, but a mechanical friction clutch is used in a vehicle using a general manual transmission, an automatic manual transmission, or a dual clutch transmission.

The clutch includes a clutch disk mounted on a transmission input shaft, and a pressure plate that presses the clutch disk against a portion of the clutch disk directly connected to the engine, such as a flywheel or a central plate. Thus, the engine power is transmitted to the transmission input shaft through the clutch disc.

The clutch disc comprises a disc plate 4 mounted on a hub 2 splined to a transmission input shaft as shown in Figure 1, a cushion plate 6 which is riveted to the disc plate 4, (8) which are riveted to both sides of the base (6).

Therefore, the rotational force is transmitted to the transmission input shaft by rotating the cushion plate 6, the disk plate 4, and the hub 2 together with the normally rotating portion by frictionally contacting the both side faces 8 with the pressure plate and the normally rotating portion.

As shown in FIG. 2, the cushion plate 6 is formed by bending a part of the body so as to have an elastic force against the pressing direction of the pressure plate and the normally rotating portion. Therefore, when the clutch disc is pressed by the pressure plate, the impact is absorbed, so that deformation and breakage of the clutch disc are prevented, and smoother power transmission is possible.

A clutch disk having the above-described structure is disclosed in Korean Patent Laid-Open Publication No. 10-2005-0100177.

On the other hand, the clutch disc does not always rotate in a completely close contact with the pressure plate and the normally rotating portion. That is, as shown in FIG. 3, rotation may be performed in a state in which the one pressing portion of the pacing 8 is in non-parallel contact. For example, the normally-rotating portion 12 (the flywheel or the central plate) of one side is in parallel contact with the pacing 8, while the pressure plate 14 of the other side is in contact with the pacing 8 in a slightly inclined state, . Such an operating condition can occur under Creep / Hill LTI (low tip in) condition (Creep: slow running with no accelerator pedal on the ground, Hill LTI: slowly rising from the ramp)

As described above, if the parallelism of the clutch disc close state is not uniform, power transmission through the clutch disc is not smoothly performed, vibration is generated in the front-rear direction of the clutch disc to generate a judder, And the ride feeling is lowered.

That is, in this state, since the cushion plate 6 has to repeatedly rotate between the normal rotation part 12 and the pressure plate 14 in a narrow space and a wide space, the load (cushion rod) applied to the cushion plate 8 is repeatedly changed, A judder is generated because the cushion plate 8 can not flexibly cope with the repeated fluctuation of the load.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a clutch device for a vehicle that can prevent the occurrence of judder even when the parallelism between the pressing portions The purpose is to provide a disk.

According to another aspect of the present invention, there is provided a transmission comprising a disk plate connected to a hub mounted on a transmission input shaft, a cushion plate connected to an end of the disk plate, and a pace mounted on both sides of the cushion plate, The plate is characterized in that the body is bent a plurality of times to have a plurality of planar portions and inclined portions, and a hole for reducing rigidity is formed through the inclined portion.

The hole may be formed only in the inclined portion.

The hole may be formed to cross a bending line between the inclined portion and the planar portion a plurality of times to divide the bending line forming portion into a plurality of portions.

The body includes an intermediate planar portion, a respective inclined portion formed by bending both sides thereof, and a side planar portion bent outwardly from each of the both inclined portions thereof.

And the heights of the both side surface planes may be different from each other.

According to the present invention as described above, there is provided a clutch disk including a low rigidity cushion plate having a hole formed therethrough and having reduced rigidity.

The low rigidity cushion plate smoothly rotates while being flexibly compressed and restored when passing through the wide and narrow portions of the both side pressing portions.

That is, since the cushion stroke is increased and no axial vibration is generated, generation of judder can be prevented.

Therefore, not only the transmission of the engine power is smoothly performed, but also the quietness and ride comfort of the vehicle are improved.

1 is a cross-sectional view and plan view of a clutch disc according to the prior art;
Fig. 2 is a sectional view of the assembled state of the cushion plate and the pacing. Fig.
3 is an illustration of an unevenness of parallelism when the clutch disc operates;
4 is a plan view of a cushion plate applied to a clutch disc according to the present invention;
5 to 7 illustrate a modification of the cushion plates.
8 is a load-stroke diagram of a conventional cushion plate (A) and a cushion plate (B) according to the present invention.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. The thicknesses of the lines and the sizes of the components shown in the accompanying drawings may be exaggerated for clarity and convenience of explanation.

In addition, the terms described below are defined in consideration of the functions of the present invention, and these may vary depending on the intention of the user, the operator, or the precedent. Therefore, definitions of these terms should be made based on the contents throughout this specification.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings. 4 to 7 show various embodiments of a cushion plate applied to a clutch disc according to the present invention.

The clutch disc according to the present invention is also identical in overall configuration to the conventional clutch disc. That is, a hub attached to the transmission input shaft, a cushion plate mounted on the disk plate, and a pace fixed to both sides of the cushion plate.

Therefore, both side faces are frictionally contacted with the pressure plate and the normally rotating portion (which is always rotated directly to the engine side to refer to the flywheel or the central plate), so that the cushion plate and the disk plate and hub are rotated together with the normally- .

The cushion plate 100 includes a plate-shaped body 110 as shown in FIG. 4 and a mounting end portion 120 in which a lower portion of the body 110 protrudes.

The upper end of the body 110 and the lower end of the mounting end 120 have a substantially arc-like arc shape. That is, the cushion plate 100 has a generally fan-shaped shape in order to allow a plurality of cushion plates 100 to be continuously arranged in the circumferential direction so as to form a disc shape that is a shape of a clutch disc.

A plurality of portions of the body 110 are bent (bent) to form a plurality of inclined portions 111 and 112 and planar portions 113, 114, and 115.

The intermediate plane portion 113 in the middle of the body 110 occupies an area of the widest portion coplanar with the mounting end portion 120.

Both side ends of the intermediate flat surface portion 113 are bent in a direction higher than the height of the intermediate flat surface portion 113 (a direction toward the person looking out in the figure as a protruding direction in the figure) to form the inclined portions 111 and 112.

The outer end portions (both side portions in the circumferential direction) of the both inclined portions 111 and 112 are bent in opposite directions to form side planar portions 114 and 115 having a height difference from the intermediate planar portion 113.

The slopes of the inclined portions 111 and 112 on both sides may be the same or different.

In addition, the height of the both side surface planar parts 114 and 115 may be different from each other when the both inclined parts 111 and 112 have the same inclination but the widths are different or the widths thereof are the same but the inclination is different. If the heights of the both side planar portions 114 and 115 are different from each other, it is advantageous to have a corresponding rigidity over a wider load range with respect to the axial load applied in the clutch disk assembled state.

The folding lines (bending lines) dividing the intermediate plane portion 113, the both side slopes 111 and 112 and the side plane portions 114 and 115 have a parallel relationship with each other. Accordingly, when the cushion plate 100 is compressed and restored by the axial load fluctuation, uniform displacement occurs throughout the entire area of the cushion plate 100, so that the normal rotation portion and the contact state between the pressure plate and the face are improved.

A circular rivet hole R1 is formed in the middle plane portion 113 and the one side plane portion 115. The intermediate plane portion 113 and the rivet holes R1 of the side plane portion 115 are arranged on a virtual concentric circle.

The mounting end 12 protrudes from the intermediate plane portion 113 and is formed into a shape that is expanded and formed on both sides in the width direction. And forms a plane having the same height as the intermediate plane portion 113 as described above.

A plurality of circular rivet holes (R2) are also formed in the mounting end portion (120). The rivet holes R2 are formed at equal intervals on a virtual arc line concentric with the arc formed by the bottom edge of the mounting end 120. [

The rivet holes R1 of the intermediate plane portion 113 and the side plane portion 115 are formed to be smaller in diameter than the rivet holes R2 of the mounting end portion 120. [ These rivet holes (R1) are mounting holes for inserting rivets for mounting the pacing on both sides of the cushion plate (100), and a sufficient number is formed so as to firmly fix the pacing.

The rivet holes R2 of the mounting end portion 120 are for providing a rivet for mounting the cushion plate 100 at the radially outer end of the disk plate. So that it can be stably and firmly attached to the end portion of the disc plate.

Since the cushion plate 100 has the inclined portions 111 and 112 formed between the plurality of flat surfaces 113, 114 and 115, the cushion plate 100 is elastically deformed in the axial direction when receiving an axial load (i.e., a pressing force by the pressure plate) So that it has a predetermined cushion stroke in the same direction.

Particularly, in the present invention, holes may be formed through the inclined portions 111 and 112.

The holes H1 may be formed only on one side inclined portion 112 or on both side inclined portions 111 and 112 as shown in FIG.

The holes H2 and H3 formed in the both inclined portions 111 and 112 may be formed to have different lengths.

The holes H1, H2 and H3 are formed in the range of the inclined portions 111 and 112 and are formed in a straight line parallel to the bending line.

The holes H1, H2, and H3 reduce the rigidity of the inclined portions 111 and 112 that give elasticity to the cushion plate 100, thereby reducing the rigidity of the cushion plate 100.

Therefore, the axial displacement can be made more easily with respect to the axial load applied in the clutch disk assembled state (in use state). That is, a larger cushion stroke for the same load.

6 and 7, the cushion plate 100 may have linear holes H4 and H5 extending through the inclined portion and the flat portion.

In the embodiment of FIG. 6, a hole H4 is formed between the one inclined portion 111 and the intermediate plane portion 113. FIG.

In the embodiment of FIG. 7, in addition to the hole H4, a hole H5 is formed so as to extend from the one-side inclined portion 112 to the intermediate plane portion 113. In particular, 112 to the side surface flat surface portion 115 adjacent to the side surface flat surface portion 115.

In other words, the holes H4 and H5 may be linearly formed to cross the bending lines between the inclined portions 111 and 112 and the planar portions 113 and 115 a plurality of times to divide the bending line forming portion into a plurality of portions.

When the holes H4 and H5 are formed over the inclined portions 111 and 112 and the planar portions 113 and 115 adjacent to the inclined portions 111 and 112 as well as the rigidity reduction effect due to the mass reduction of the inclined portions 111 and 112 themselves, The cushion plate 100 is formed across the bending line which is a main part of the generation of the elastic reaction force, resulting in a further weakening of the rigidity with respect to the axial load of the cushion plate 100.

8 is a load-stroke diagram of a conventional cushioning plate A and a cushioning plate B according to the present invention (in the case of the embodiment of Fig. 4). As can be seen from the graph, it can be seen that the cushion plate (B) according to the present invention has a larger cushion stroke value under the same cushion load conditions. That is, the low stiffness cushion plate 100 according to the present invention with respect to the axial load has a more flexible axial displacement.

Therefore, the cushion plate 100 can flexibly cope with the axial load fluctuation caused by the variation of the interval between the normally rotating portion and the pressure plate under the condition that the parallelism of the clutch friction state is uneven as shown in FIG.

In other words, the thickness of the cushion plate 100 in the axial direction is flexibly increased or decreased in accordance with the increase or decrease in the interval between the normally rotating portion and the pressure plate, thereby enabling the clutch disk to rotate more smoothly, .

As described above, since no axial vibration is generated in the clutch disc, it is possible to prevent a jerk that occurs in the clutch as a whole and noise and vibration due to the judder are not generated, thereby improving the quietness and riding comfort of the vehicle .

In addition, the reduction of the axial vibration reduces the rotation of the clutch disc as well as the surface contact between the normally rotating portion, the pressure plate, and the both side faces, thereby improving power transmission performance.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It is understandable. Accordingly, the true scope of the present invention should be determined by the following claims.

100: Cushion plate 110: Body
111, 112: sloped portion 113: intermediate plane portion
114, 115: Side plane portion R1, R2: Rivet hole
H1, H2, H3, H4, H5: Hole

Claims (5)

A disk plate connected to a hub mounted on the transmission input shaft;
A cushion plate connected to an end of the disc plate;
And a pacing member mounted on both sides of the cushion plate,
Wherein the cushion plate is formed by bending the body a plurality of times to have a plurality of planar portions and inclined portions, and a hole for reducing rigidity is formed through the inclined portion. The method according to claim 1,
And the hole is formed so as to be limited to the inclined portion. The method according to claim 1,
Wherein the hole is formed across a plurality of bending lines between the inclined portion and the planar portion so as to divide the bent line forming portion into a plurality of portions. The method according to claim 1,
Characterized in that the body includes a middle plane portion and a side plane portion bending outwardly of each of the slopes and bending portions formed on both sides of the intermediate plane portion. The method of claim 4,
And the heights of the both side surface planes are different from each other.

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