KR20160107543A

KR20160107543A - piston cover

Info

Publication number: KR20160107543A
Application number: KR1020150030415A
Authority: KR
Inventors: 김철진
Original assignee: 현대 파워텍 주식회사
Priority date: 2015-03-04
Filing date: 2015-03-04
Publication date: 2016-09-19

Abstract

The present invention relates to a piston cover. More specifically, the present invention relates to the piston cover, surrounding an outer diameter of a piston actuating unit to prevent a clutch piston for an existing automatic transmission from being deformed or damaged by widening of the piston actuating unit caused by a centrifugal force generated by axial rotation.

Description

The piston cover

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a piston cover, and more particularly, to a clutch cover for a conventional automatic transmission including a piston having a structure that surrounds an outer diameter of a piston operating portion to prevent deformation or breakage of the clutch operating piston due to centrifugal force, This invention relates to a cover.

Generally, the clutch rotates the shaft, and the piston is operated or not operated depending on whether or not the operating oil pressure is applied. At this time, the piston can take various shapes in consideration of the surrounding structural conditions. Among them, the operation part for pushing the disk set is formed in a shape similar to that of the fork shape, and there are parts which are free from the circumference of the piston operation support part.

Such a configuration may cause problems such as deformation and breakage because the clutch is rotated at a high speed while the components such as the piston operating part are expanded in the radial direction by the centrifugal force.

Japanese Patent Application Laid-Open No. 2007-239972

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to provide a piston cover which covers an outer diameter of a piston operating part to prevent a component such as a piston operating part from being deformed or damaged by a centrifugal force have.

The present invention relates to a piston which is rotated at a high speed and which is squeezed onto a disk, a piston operating support formed at an end of the piston, an operating part protruding a predetermined length toward the disk formed in the circumference of the disk of the piston operating support, And a ring-shaped piston cover which surrounds the outer diameter of the actuating part.

The piston cover of the present invention can prevent deformation and breakage of parts such as a piston rotating at a high speed and expanding in a radial direction by rotating centrifugal force, thereby increasing the durability of parts.

In the prior art, when the piston cover is installed, the piston operating force is transmitted to the clutch disk set via the piston cover, so that the operating force of the piston is reduced. There is an advantage that it can be evenly distributed to the clutch disk set and transmitted.

1 shows a clutch piston for an automatic transmission.
2 shows a conventional piston operating part.
Fig. 3 is a view showing a conventional piston operating part at high speed rotation.
Figure 4 shows a piston operating part and a piston cover according to the invention.
5 is a perspective view of a piston operating part and a piston cover mounting shape according to the present invention.
6 is a sectional view of a first embodiment of a piston operating part and a piston cover mounting according to the present invention.
7 is a sectional view of a second embodiment of a piston operating part and a piston cover mounting according to the present invention.

For a better understanding of the present invention, a preferred embodiment of the present invention will be described with reference to the accompanying drawings. The embodiments of the present invention can be modified in various forms, and the scope of the present invention should not be construed as being limited to the embodiments described in detail below. The present embodiments are provided to enable those skilled in the art to more fully understand the present invention. Therefore, the shapes and the like of the elements in the drawings can be exaggeratedly expressed to emphasize a clearer description. It should be noted that the same components are denoted by the same reference numerals in the drawings. Detailed descriptions of well-known functions and constructions which may be unnecessarily obscured by the gist of the present invention are omitted.

The present invention relates to a piston (1) which is rotated at a high speed and which is pressed onto a disk (2), a piston operating support portion (3) formed at an end of the piston (1) An operating portion 4 protruding by a predetermined length toward the disk 2 formed on the circumference of the disk 2; and a ring-shaped piston cover 5 surrounding the outer diameter of the operating portion 4 at the end of the operating portion 4 .

1 shows a clutch piston for an automatic transmission.

Generally, the clutch 1 is operated or not operated depending on whether or not the operating oil pressure is applied while rotating the shaft. At this time, the piston 1 can take various shapes in consideration of the surrounding structural conditions.

Figure 2 shows a conventional piston actuation.

The piston operating part 4, which pushes the disk 2 out of various shapes of the piston, may be provided in a shape similar to a fork shape in the circumference of the piston operating support part 3. In this case, 3) There are parts in the circumference that do not have fork shape.

3, when the clutch rotates at a high speed as shown in the shape of the conventional piston operating portion 4 during high-speed rotation, the components such as the piston operating portion 4 are expanded in the radial direction by the centrifugal force, So that problems such as deformation and breakage may occur.

In addition, since the operating force of the piston 1 is not directly transmitted to the portion of the piston operating support 3 that is free from the circumference of the piston, the operating force of the piston 1 may not be uniformly dispersed.

4 shows a piston operating part and a piston cover according to the present invention.

The thickness of the actuating portion 4 is equal to or smaller than the thickness of the piston actuating support portion 3 on the side of the disc 2 and the height and length of the actuating portion 4 are not limited.

The actuating part 4 protrudes in the form of a fork and is spaced along the circumference of the piston actuating support part 3 at a predetermined interval.

A plurality of the actuating portions 4 may be provided, but six actuating portions 4 are shown in the embodiment of the present invention. As in the embodiment of the present invention, when the operation part 4 is an even number, the operation part can be installed facing the (4).

Fig. 5 shows a piston operating part and a piston cover mounting shape according to the present invention.

As shown in the figure, by mounting the piston cover 5 on the piston operating part 4, deformation and breakage of the piston operating part 4 expanded in the radial direction and expanded can be prevented, The operating force of the piston 1 is transmitted to the clutch disc 2 through the piston cover 5 so that the operating force of the piston 1 can be dispersed and transmitted to the clutch disc 2 evenly.

6 shows a cross-sectional view of a first embodiment of a piston operating part and a piston cover mounting according to the present invention.

An operating portion groove 6 having a predetermined depth coinciding with the piston cover 5 is formed on an outer circumference of the operating portion 4 and an inner circumferential surface of the piston cover 5 is formed with a depth So that the corresponding cover projection 8 is formed and fitted.

Fig. 7 shows a sectional view of a second embodiment of a piston operating part and a piston cover mounting according to the present invention.

An operating portion protrusion 7 having a predetermined height coinciding with the piston cover 5 is formed on an outer circumference of the operating portion 4 and an inner circumferential surface of the piston cover 5 The corresponding cover groove 9 is formed and fitted.

It should be understood that the piston cover of the present invention described above is merely illustrative and that those skilled in the art will appreciate that various modifications and equivalent embodiments are possible without departing from the scope of the present invention. There will be. Therefore, it is to be understood that the present invention is not limited to the above-described embodiments. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims. It is also to be understood that the invention includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.

1: piston
2: disk
3: piston operating support
4:
5: Piston cover
6: Operation part groove
7: Turning operation part
8: Cover projection
9: Cover groove

Claims

A piston which rotates at a high speed and is pressed onto the disk;
A piston operating support formed at an end of the piston;
An actuating part protruding by a predetermined length toward the disk formed on the circumference of the disk of the piston actuation support part;
A ring-shaped piston cover which surrounds the outer diameter of the operating portion;
Wherein the piston cover comprises:

The method according to claim 1,
Wherein an outer circumferential surface of the operating portion is formed with an operating groove having a predetermined depth corresponding to the piston cover, thereby fitting the piston cover.

The method according to claim 1,
Wherein the piston cover is fitted to the outer periphery of the operating part by forming an actuating part protrusion of a constant height coinciding with the piston cover.

3. The method of claim 2,
And a cover protrusion is formed on an inner circumferential surface of the piston cover to correspond to a depth of the operating part groove.

The method of claim 3,
And a cover groove is formed on an inner circumferential surface of the piston cover to correspond to a height of the actuating portion projection.

The method according to claim 1,
Wherein a plurality of the actuating portions are provided.

The method according to claim 1,
Wherein six actuating portions are provided.

The method according to claim 1,
Wherein when the number of the actuating portions is an even number, the actuating portion is installed facing the piston.

The method according to claim 1,
Wherein the actuating portion is spaced a predetermined distance along a circumference of the piston actuating support.

The method according to claim 1,
Wherein the thickness of the actuating portion is equal to or smaller than the thickness of the piston-side circumference of the piston actuating support portion, and the height and the length of the actuating portion are not limited.

The method according to claim 1,
Wherein the actuating portion protrudes in the form of a fork.