KR19980041947U - Clutch of automatic transmission - Google Patents

Abstract

A clutch of an automatic transmission attached to a clutch disk by a piston to control a friction force between the clutch disk and the clutch plate, the clutch comprising:

To reduce drag torque by using a friction material of different material between the clutch disc and the clutch plate to retain complex characteristics such as heat resistance and compressibility or by using an elastic clutch disc having flexure;

A clutch of an automatic transmission, wherein a friction material of different material is provided between the clutch disk and the clutch plate, and one side of the friction material is attached to the clutch disk or the clutch plate.

Description

Clutch of automatic transmission

1 is a cross-sectional view of a clutch of an automatic transmission according to the present invention,

2 is a cross-sectional view of an example in which the portion A of FIG. 1 is enlarged;

3 is a cross-sectional view of another example in which the portion A of FIG. 1 is enlarged;

4 is a cross-sectional view of portion A of FIG. 1 according to the prior art.

Explanation of symbols on the main parts of the drawings

7, 21: clutch disc 9: clutch plate

17, 19: friction material

[Industrial use]

The present invention relates to a clutch of an automatic transmission, and more particularly, by using a friction material of a different material between the clutch disk and the clutch plate, so as to have a complex characteristic such as heat resistance and compressibility, or to use an elastic clutch disk having bending. The present invention relates to a clutch of an automatic transmission, thereby reducing drag torque.

[Prior art]

In general, the automatic transmission is equipped with a plurality of friction elements to control each speed stage.

The friction element includes a brake friction element and a clutch friction element.

4 shows a part of the clutch friction element as described above, and is conventionally operated by hydraulic pressure acting on a piston (not shown) inside the outer circumference of a clutch retainer (not shown) fixedly coupled to an input shaft (not shown). The clutch disc 101 and the clutch plate 103 are interposed.

In order to control the friction force between the clutch disk 101 and the clutch plate 103, friction materials 105 of the same material are attached to both surfaces of the clutch disk.

Thus, the clutch plate 103 is applied by the piston to act as a vertical drag force between the clutch disk 101 and the clutch plate 103, the friction material 105 is the clutch disk 101 described above. And both clutch plates 103 are interlocked.

In addition, when the action force acting on the clutch plate 103 is removed, the vertical drag is removed between the clutch disk 101 and the clutch plate 103, and between the clutch disk 101 and the clutch plate 103. Since the frictional force acting on it is removed, the power is cut off.

[Problem trying to solve]

However, the conventional apparatus has a problem in that the same material is used on both sides of the clutch disk to simultaneously retain the effects of complex characteristics such as heat resistance and compressibility.

There is a problem that the clutch disk is formed straight so that the drag torque is large due to the viscosity of the fluid between the clutch disk and the clutch plate.

[Means to solve the problem]

The present invention is designed to solve these problems of the prior art, the object of the present invention is to use a friction material of different materials between the clutch disk and the clutch plate to retain the complex characteristics such as heat resistance and compressibility or elastic to retain the bending It is to provide a clutch of an automatic transmission that reduces drag torque by using a clutch disc.

In order to achieve the above object, the device of the present invention is a clutch of an automatic transmission which is attached to a clutch disk by a piston to control a friction force between the clutch disk and the clutch plate, the material between the clutch disk and the clutch plate. A clutch of an automatic transmission is provided which installs this other friction material and attaches one side of the friction material to this clutch disk or clutch plate.

The clutch disk is characterized in that the waveform is formed.

[Action]

The clutch made in this way uses a friction material of excellent heat resistance on one side of the clutch plate or clutch disk and a friction material of excellent compression on the other side.

Thus, when the clutch plate is subjected to pressure, a force that narrows the gap between the clutch plates acts, and this action force cooperates with the clutch disc and the clutch plate.

It possesses complex characteristics in interlocking the clutch disk and the clutch plate.

In addition, when the clutch disk and the clutch plate are released by using the curved clutch disk, the opposing surface between the clutch disk and the clutch plate is narrowed.

EXAMPLE

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in more detail.

1 and 2 show an example of a clutch friction element to which the present embodiment is applied, the clutch friction element of this embodiment includes a clutch retainer 1 fixedly coupled to an input shaft (not shown), and this clutch. It includes a piston (5) moved in the axial direction while receiving the elastic force and the hydraulic pressure of the elastic member (3) inside the retainer (1).

Inside the outer circumference of the clutch retainer 1, a clutch disk 7 and a clutch plate 9 which operate by hydraulic pressure acting on the piston 5 are interposed.

In addition, an oil hole 11 through which oil supplied from an oil pump (not shown) is formed is formed inside the clutch retainer 1 and the input shaft.

The oil introduced into the oil hole 11 is supplied between the surface of the clutch retainer 1 and the piston 5 facing each other, and a check valve 13 is mounted on one side of the piston 5.

The clutch disc 7 is installed on the outer circumference of the hollow output shaft 15 and interlocks with the output shaft 15.

One side of the clutch disc 7 is provided with a friction material 17 of excellent heat resistance, and one side of the clutch plate 9 is provided with a friction material 19 of excellent compressibility.

Of course, one side of the clutch disk 7 is attached to the friction material 17 of excellent compression material, one side of the clutch plate 9 is attached to the friction material 19 of excellent heat resistance material Can be.

When the clutch is operated, pressure is applied in a direction in which the piston 5 imparts a vertical force to the clutch plate 9 by hydraulic pressure through the oil hole 11.

Then, the clutch plate 9 and the clutch disk 7 are interlocked by the friction materials 17 and 19 interposed between the clutch plate 9 and the clutch disk 7.

In addition, the hydraulic pressure through the oil hole 11 disappears, and at the same time, the action force of the piston 5 is removed from the clutch plate 9 and the clutch disk 7, and the clutch plate 9 and the clutch are Power transmission between the disks 7 is released.

3 shows another example of the friction element applied to this embodiment, in which the friction disks 17 and 19 are positioned on both sides, using the wavy clutch disk 21 instead of the clutch disk 7 of the flat shape. Is composed of different materials.

When the clutch including the clutch disk 21 is operated, pressure is applied in the direction in which the piston 5 imparts a vertical force to the clutch plate 9 by hydraulic pressure through the oil hole 11.

Then, the clutch plate 9 and the clutch disc 21 are interlocked by the friction materials 17 and 19 interposed between the clutch plate 9 and the clutch disc 21.

At this time, the waveform of the clutch disk 21 is flat spread and contact with the clutch plate (9).

In this state, the hydraulic pressure through the oil hole 11 disappears and at the same time the action force of the piston 5 is removed from the clutch plate 9 and the clutch disk 21, and the clutch plate 9 And transmission of power between the clutch disc 21 are released.

At this time, as the clutch disk 21 is corrugated again, the clutch plate 9 and the power transmission are released more quickly.

[effect]

The device made as described above has the advantage of providing a clutch having complex characteristics by interlocking between the clutch disk and the clutch plate by using friction materials of different materials.

In addition, when the clutch disc and the clutch plate are released by using the curved clutch disc, the opposing surface between the clutch disc and the clutch plate is narrowed, thereby reducing drag torque existing between the clutch disc and the clutch plate. There is another advantage.

Claims (2)

In a clutch of an automatic transmission attached to a clutch disc by a piston to control a friction force between the clutch disc and the clutch plate, Between the clutch disc 7 and the clutch plate 9, friction materials 17 and 19 of different materials are provided, and one side of the friction material 17 and 19 is attached to the clutch disc 7 or the clutch plate 9; Attaching clutch of automatic transmission. The clutch of an automatic transmission according to claim 1, wherein the clutch disk is formed into a waveform.