KR102468461B1 - Clutch apparatus for automatic transmission - Google Patents

Abstract

The present invention relates to a clutch device for an automatic transmission, comprising: a driving member to which driving force of an engine is input; a boss coupled to the driving member to be rotated; and a piston movably coupled to the boss to pressurize a disk unit; First and second supply units installed in the driving member and receiving oil from the rear cover, and first and second branch units installed in the boss unit and communicating with the first supply unit and the second supply unit, respectively; A first pressure chamber disposed on one side of the piston unit and communicating with the first branch unit to form hydraulic pressure on one side of the piston unit and disposed on the other side of the piston unit and communicating with the second branch unit to form hydraulic pressure on the other side of the piston unit It is characterized in that it includes a second pressure chamber.

Description

Clutch device for automatic transmission {CLUTCH APPARATUS FOR AUTOMATIC TRANSMISSION}

The present invention relates to a clutch device for an automatic transmission, and more particularly, to a clutch device for an automatic transmission equipped with an oil flow path.

In general, an automatic transmission is a device that automatically shifts gears to appropriate gears according to driving conditions of a vehicle. In order to implement such an automatic shift, a plurality of friction elements such as a clutch and a brake for controlling the operation of the planetary gear set and the planetary gear set are provided in the automatic transmission. Among them, the clutch serves to transmit engine power to the planetary gear set or to mediate power transmission between the planetary gear sets. Such a clutch can be used for selective transmission of power not only in automatic transmissions but also in general machines.

Since these clutches are hydraulically controlled, they require a plurality of oil passages. These passages are formed in the form of tubes or holes inside various parts such as cases, rear covers, bosses, and shafts, or are formed as gaps between adjacent parts.

Conventional clutches have a flow path inside the center support to supply operating pressure or balance pressure. However, in order to form such a passage, it is unavoidable to secure a certain level of flesh thickness in the axial direction, which leads to an increase in the overall length of the transmission, resulting in poor vehicle mountability.

Meanwhile, the background art of the present invention is disclosed in Republic of Korea Patent Publication No. 10-2014-0143948 (published on December 18, 2014, title of the invention: clutch device for automatic transmission for vehicles).

An object of the present invention is to provide a clutch device for an automatic transmission capable of reducing an electric field through a change in a flow path structure.

Another object of the present invention is to provide a clutch device for an automatic transmission capable of separating an operating pressure passage and a balance pressure passage.

In order to solve the above problems, a clutch device for an automatic transmission according to the present invention includes: a driving member to which driving force of an engine is input; a boss portion coupled to the driving member and rotated; a piston unit that is movably coupled to the boss unit and pressurizes the disk unit; a first supply unit and a second supply unit installed on the driving member and receiving oil from the rear cover; a first branching part and a second branching part installed in the boss part and communicating with the first supplying part and the second supplying part, respectively; a first pressure chamber disposed on one side of the piston unit and communicating with the first branch unit to form hydraulic pressure on one side of the piston unit; and a second pressure chamber disposed on the other side of the piston unit and communicating with the second branch unit to form hydraulic pressure on the other side of the piston unit.

In addition, the first supply unit may include a first supply passage disposed inside the driving member and extending in an axial direction of the driving member; and a first connection passage connected to the first supply passage and extending in a radial direction of the driving member to communicate with the first branching part, wherein the second supply part is disposed inside the driving member, a second supply passage extending in the axial direction of the driving member and spaced apart from the first supply part; and a second connection passage connected to the second supply passage and extending in a radial direction of the driving member to communicate with the second branching portion.

In addition, the first connection passage and the second connection passage are spaced apart from each other in a circumferential direction of the driving member.

Also, the first connection passage and the second connection passage are spaced apart from each other in an axial direction of the driving member.

In addition, the boss portion may include a sleeve coupled to an outer circumferential surface of the driving member; and a boss coupled to an outer circumferential surface of the sleeve and movably coupled to the piston unit, wherein the first and second branch portions pass through the sleeve and the boss and are spaced apart from each other.

In addition, the first branch portion may include a first sleeve flow path extending in a radial direction of the sleeve and communicating with the first supply unit; and a first boss passage extending in a radial direction of the boss and communicating with the first sleeve passage and the first pressure chamber, wherein the second branching part is disposed spaced apart from the first sleeve passage, a second sleeve passage extending in the radial direction of the sleeve and communicating with the second supply unit; and a second boss passage extending in the radial direction of the boss and communicating with the second supply unit and the second pressure chamber.

The clutch device for an automatic transmission according to the present invention can supply oil by utilizing a driving member through the first supply unit and the second supply unit, thereby preventing an increase in electric field due to the addition of a separate oil passage structure, thereby improving vehicle mountability. It can be.

In addition, the clutch device for an automatic transmission according to the present invention has a simple structure and separates the operating pressure passage and the balance pressure passage flowing into the first pressure chamber and the second pressure chamber from each other, thereby reducing installation and manufacturing costs. have.

1 is a cross-sectional view schematically showing the configuration of a clutch device for an automatic transmission according to an embodiment of the present invention.
2 is an enlarged view showing the configuration of a clutch device for an automatic transmission according to an embodiment of the present invention in more detail.
FIG. 3 is an enlarged view of a configuration of a clutch device for an automatic transmission according to an embodiment of the present invention viewed from a different angle from that of FIG. 2 .
4 is a perspective view schematically illustrating the configuration of a boss part according to an embodiment of the present invention.
5 is a cross-sectional view schematically illustrating a configuration of a first branch unit according to an embodiment of the present invention.
6 is a cross-sectional view schematically illustrating a configuration of a second branch unit according to an embodiment of the present invention.
7 and 8 are operational diagrams schematically illustrating an operating state of a clutch device for an automatic transmission according to an embodiment of the present invention.

Hereinafter, an embodiment of a clutch device for an automatic transmission according to the present invention will be described with reference to the accompanying drawings.

In this process, the thickness of lines or the size of components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to the intention or custom of a user or operator. Therefore, definitions of these terms will have to be made based on the content throughout this specification.

In addition, in this specification, when a part is said to be “connected (or connected)” to another part, this is not only the case where it is “directly connected (or connected)”, but also “with another member in between” It also includes cases where it is indirectly connected (or connected). In this specification, when it is said that a certain part "includes (or includes)" a certain component, this does not exclude other components unless otherwise stated, but "includes (or includes)" other components. It means you can.

Also, like reference numerals may refer to like elements throughout this specification. Even if the same reference numerals or similar reference numerals are not mentioned or described in a particular drawing, the numerals may be described based on another drawing. In addition, even if there are parts not marked with reference numerals in specific drawings, the parts can be described based on other drawings. In addition, the number, shape, size, and relative difference of the detailed components included in the drawings of the present application are set for convenience of understanding, and may be implemented in various forms without limiting the embodiments.

1 is a cross-sectional view schematically showing the configuration of a clutch device for an automatic transmission according to an embodiment of the present invention, and FIG. 2 is an enlarged view showing the configuration of a clutch device for an automatic transmission according to an embodiment of the present invention in more detail. 3 is an enlarged view of a configuration of a clutch device for an automatic transmission according to an embodiment of the present invention viewed from a different angle from that of FIG. 2 .

1 to 3, a clutch device for an automatic transmission according to an embodiment of the present invention includes a driving member 100, a boss part 200, a piston part 300, a first pressure chamber 400, a first It includes a second pressure chamber 500, a first supply unit 600, a second supply unit 700, a first branch unit 800, and a second branch unit 900.

One side of the driving member 100 is connected to an output shaft of an engine (not shown), rotates in a forward or reverse direction by receiving rotational driving force of the engine, and the other side is coupled to the rear cover 10 . The driving member 100 according to an embodiment of the present invention is formed to have a cylindrical column shape. Spline teeth may be formed on the outer circumferential surface of the driving member 100 to prevent the boss 200 from being rotated relative to the driving member 100 .

The rear cover 10 is disposed at the rear of the clutch device for an automatic transmission according to the present invention to separate the inside of the clutch device for an automatic transmission from the outside. The rear cover 10 is coupled to the other side of the driving member 100 to support the driving member 100 . The rear cover 10 has an oil passage (not shown) communicating with the first supply unit 600 and the second supply unit 700 so that oil can be supplied to the first supply unit 600 and the second supply unit 700 described later. It may be provided inside.

The boss part 200 is coupled to the driving member 100 and rotates. The boss part 200 is provided to provide a space in which parts of the clutch device for an automatic transmission according to the present invention, such as the piston part 300 and the retainer 20, can be mounted.

4 is a perspective view schematically illustrating the configuration of a boss part according to an embodiment of the present invention.

Referring to FIG. 4 , the boss portion 200 according to an embodiment of the present invention may include a sleeve 210 and a boss 220 .

The sleeve 210 is coupled to the outer circumferential surface of the driving member 100 . Sleeve 210 according to an embodiment of the present invention is provided to have a hollow cylindrical shape. The sleeve 210 is press-fitted or spline-coupled to the outer circumferential surface of the driving member 100, and is disposed parallel to the axial direction of the driving member 100.

The boss 220 is press-fitted to the outer circumferential surface of the sleeve 210 . The boss 220 may reduce the weight of the vehicle by including a material that is relatively lighter than the sleeve 210 . The boss 220 may be press-fitted to the outside of the sleeve 210 and coupled to the driving member 100 in a state of forming one assembly. Boss 220 according to an embodiment of the present invention is provided to have a hollow cylindrical shape. The boss 220 is press-fitted to the outer circumferential surface of the sleeve 210 and disposed parallel to the axial direction of the driving member 100 .

Inside the boss 220, a plurality of accommodating spaces recessed from the inner circumferential surface toward the outer circumferential surface of the boss 220 may be provided to accommodate oil. Accordingly, the boss 220 can change the oil flow path of the first branch part 800 and the second branch part 900 to be described later in more various ways.

A retainer 20 may be coupled to the outside of the boss 220 . As one side of the retainer 20 is coupled to the outside of the boss 220 by welding or the like, the retainer 20 may rotate integrally with the boss 200 . The retainer 20 is formed in a shape in which the other side extends from the boss 220 and surrounds the boss 220 . Accordingly, an empty space is formed between the boss 220 and the retainer 20, so that a space in which a piston unit 300, a disk unit 40, etc., which will be described later can be mounted can be provided.

The piston part 300 is movably coupled to the boss part 200 and pressurizes the disk unit 40 . The piston unit 300 is coupled to be movable in the longitudinal direction of the boss unit 200, that is, in the axial direction of the driving member 100. The piston unit 300 moves in the axial direction of the driving member 100 by hydraulic pressure generated by the first pressure chamber 400 and the second pressure chamber 500 to be described later, thereby selectively pressurizing the disk unit 40. do.

In the disk unit 40, a clutch plate 41 coupled to the retainer 20 and a clutch disk 42 coupled to the hub 30 are alternately disposed. In the disk unit (40), power is transmitted between the retainer 20 and the hub 30 connected to the planetary gear set 50 as the clutch plate and the clutch disk come into contact with each other by the pressing force by the piston unit 300. It becomes possible.

The piston unit 300 according to an embodiment of the present invention may include a clutch piston 310, a balance piston 320, and a return spring 330.

One side of the clutch piston 310 is movably coupled to the boss 220 in the axial direction and the other side is disposed to face the disk unit 40 . Accordingly, the clutch piston 310 is interlocked with one side of the movement direction so that the other side contacts or releases contact with the disk unit 40 and presses or releases the disk unit.

The balance piston 320 is coupled to the boss 220 of the boss portion 200 and is spaced apart from the piston clutch 310 to face each other.

The return spring 330 is disposed between the balance piston 320 and the clutch piston 310 . The return spring 330 is provided with an elastic restoring force to elastically support the clutch piston 310 . Accordingly, the return spring 330 may restore the clutch piston 310 to its original position by an elastic restoring force when the supply of hydraulic pressure is released. The return spring 320 according to an embodiment of the present invention is exemplified as a plate-shaped spring, and both ends are in contact with the piston part 300 and the balance piston 310, respectively, to elastically support the piston part 300.

The first pressure chamber 400 is disposed on one side of the piston unit 300 and is in communication with a first branch unit 800 to be described later, and the piston unit 300 is moved by oil supplied from the first branch unit 800. Hydraulic pressure is formed on one side. The first pressure chamber 400 according to an embodiment of the present invention may be exemplified as a space between the retainer 20 and the clutch piston 310 . The first pressure chamber 400 moves the clutch piston 310 toward the disk unit 40 with hydraulic pressure generated by oil supplied from the first branch unit 800 .

The second pressure chamber 500 is disposed on the other side of the piston part 300 and is in communication with the second branch part 900, so that the oil supplied from the second branch part 900 is placed on the other side of the piston part 300. form a hydraulic pressure. The second pressure chamber 500 according to an embodiment of the present invention may be exemplified as a space between the balance piston 320 and the clutch piston 310 . The second pressure chamber 500 is a hydraulic pressure formed by oil supplied from the second branch unit 900 and prevents the clutch piston 310 from moving rapidly when excessive hydraulic pressure is generated in the first pressure chamber 400 or , to offset the centrifugal hydraulic pressure generated by the oil remaining in the first pressure chamber 400.

The first supply unit 600 is installed on the driving member 100 and receives oil from the rear cover 10 . The first supply unit 600 is connected to the oil passage of the rear cover 10 to provide a path through which oil can move inside the driving member 100 . The first supply unit 600 according to an embodiment of the present invention may include a first supply passage 610 and a first connection passage 620 .

The first supply passage 610 is disposed inside the driving member 100 and extends in the axial direction of the driving member 100 . The first supply passage 610 according to an embodiment of the present invention is provided to have a tubular shape having a circular cross section and penetrates the inside of the driving member 100 . The first supply passage 610 is disposed parallel to the axial direction of the driving member 100 . One side of the first supply passage 610 communicates with the oil passage provided in the rear cover 10 and the other side extends to a point facing the inner circumferential surface of the boss portion 200 . The first supply passage 610 may be provided in plural numbers and may be disposed along a concentric circle having a smaller diameter than the diameter of the cross section of the driving member 100 .

The first connection passage 620 is connected to the first supply passage 610 and extends in the radial direction of the driving member 100 to communicate with the first branch portion 800 . The first connection passage 620 according to an embodiment of the present invention is provided to have a tubular shape, and one side communicates with the first supply passage 610 . The other side of the first connection passage 620 extends in the radial direction of the driving member 100 and passes through the outer circumferential surface of the driving member 100 to communicate with the first branching portion 800 to be described later. The first connection passage 620 may be disposed parallel to the radial direction of the driving member 100 , and may also be disposed inclined with the radial direction of the driving member 100 .

The second supply unit 700 is installed on the driving member 100 and receives oil from the rear cover 10 . The second supply unit 700 is connected to the oil passage of the rear cover 10 to provide an oil movement path different from that of the first supply unit 600 inside the driving member 100 . The second supply unit 700 according to an embodiment of the present invention may include a second supply passage 710 and a second connection passage 620 .

The second supply passage 710 is disposed inside the driving member 100, extends in the axial direction of the driving member 100, and is spaced apart from the first supply unit 610. The second supply passage 710 according to an embodiment of the present invention is provided to have a tubular shape having a circular cross section and penetrates the inside of the driving member 100 . The second supply passage 710 may be disposed on the same axis as the central axis of the driving member 100 and spaced apart from the first supply passage 610 in a radial direction of the driving member 100 . The second supply passage 710 has one side communicating with the oil passage provided in the rear cover 10 and the other side extending to a point facing the inner circumferential surface of the boss portion 200 .

The second connection passage 720 is connected to the second supply passage 710 and extends in the radial direction of the driving member 100 to communicate with the second branch portion 900 . The second connection passage 720 according to an embodiment of the present invention is provided to have a tubular shape, and one side communicates with the second supply passage 710 . The other side of the second connection passage 720 extends in the radial direction of the driving member 100 and passes through the outer circumferential surface of the driving member 100 to communicate with the second branching portion 900 described later. The second connection passage 720 may be disposed parallel to the radial direction of the driving member 100 , and may also be disposed inclined with the radial direction of the driving member 100 .

Meanwhile, the first connection passage 620 and the second connection passage 720 may be spaced apart from each other in the circumferential direction of the driving member 100 or may be spaced apart from each other in the axial direction of the driving member 100 . In addition, the first connection passage 620 and the second connection passage 720 may be disposed simultaneously spaced apart in the circumferential direction and the axial direction of the driving member 100 as shown in FIGS. 2 and 3 . Accordingly, the first connection passage 620 and the second connection passage 720 may separate paths of oil flowing into the first pressure chamber 400 and the second pressure chamber 500 , respectively.

The first branch part 800 is installed on the boss part 200 and communicates with the first supply part 600 to introduce oil into the first pressure chamber 400 . More specifically, the first branch portion 800 penetrates both the sleeve 210 and the boss 220 of the boss portion 200 to communicate the first supply portion 600 and the first pressure chamber 400 .

5 is a cross-sectional view schematically illustrating a configuration of a first branch unit according to an embodiment of the present invention.

Referring to FIGS. 2 and 5 , the first branching part 800 according to an embodiment of the present invention includes a first sleeve flow path 810 and a first boss flow path 820 .

The first sleeve flow passage 810 extends in the radial direction of the sleeve 210 and communicates with the first supply unit 600 . The first sleeve passage 810 has one side facing the first connection passage 620 and the other side facing the accommodation space of the boss 220 so that the first connection passage 620 communicates with the accommodation space. . The first sleeve flow passage 810 according to an embodiment of the present invention is formed in the shape of a hole vertically penetrating the outer circumferential surface of the sleeve 210 . The first sleeve passage 810 is disposed to face the right side of the accommodating space (refer to FIGS. 2 and 5) to communicate the first connection passage 620 with the accommodating space.

The first boss passage 820 extends in the radial direction of the boss 220 and communicates with the first sleeve passage 810 and the first pressure chamber 400 . The first boss passage 820 has one side facing the accommodation space of the boss 220 and the other side facing the first pressure chamber 400 to communicate the first pressure chamber 400 and the accommodation space. . The first boss passage 820 according to an embodiment of the present invention is formed in the shape of a hole that vertically penetrates the outer circumferential surface of the boss 220 . The first boss passage 820 is disposed to face the left side of the accommodating space (refer to FIGS. 2 and 5) and communicates the first pressure chamber 400 with the accommodating space.

The second branch unit 900 communicates with the second supply unit 600 to introduce oil into the second pressure chamber 500 . The second branch part 900 is disposed apart from the first branch part 800 to separate the path of the oil flowing into the second pressure chamber 500 . More specifically, the second branching part 800 penetrates both the sleeve 210 and the boss 220 of the boss part 200 at a different point from the first branching part 900 to form the second supply part 600 and the second branching part 600. The second pressure chamber 400 is communicated.

6 is a cross-sectional view schematically illustrating a configuration of a second branch unit according to an embodiment of the present invention.

Referring to FIGS. 3 and 6 , the second branching part 900 according to an embodiment of the present invention includes a second sleeve flow path 910 and a second boss flow path 920 .

The second sleeve flow path 910 is disposed to be spaced apart from the first sleeve flow path 810 and extends in the radial direction of the sleeve 210 to communicate with the second supply unit 700 . The second sleeve passage 910 has one side facing the second connection passage 720 and the other side facing the accommodation space of the boss 220 so that the second connection passage 720 communicates with the accommodation space. . The second sleeve passage 910 according to an embodiment of the present invention is formed in the shape of a hole that vertically penetrates the outer circumferential surface of the sleeve 210 . The second sleeve passage 910 is disposed to face the left side of the accommodating space (refer to FIGS. 3 and 6) and communicates the second connection passage 720 with the accommodating space. Meanwhile, when the first connection passage 610 and the second connection passage 710 are spaced apart in the circumferential direction of the driving member 100, the second sleeve passage 910 is also formed between the first sleeve passage 810 and the driving member 100. ), and accordingly, the second sleeve flow path 910 communicates with the first sleeve flow path 810 and the receiving space at a different position.

The second boss passage 920 extends in the radial direction of the boss and communicates with the second supply unit and the second pressure chamber. The second boss passage 920 has one side facing the accommodation space of the boss 220 and the other side facing the second pressure chamber 500 to communicate the second pressure chamber 500 and the accommodation space. . The second boss passage 920 according to an embodiment of the present invention is formed in the shape of a hole that vertically penetrates the outer circumferential surface of the boss 220 . The second boss passage 920 is disposed to face the right side of the accommodating space (refer to FIGS. 3 and 6) and communicates the second pressure chamber 500 with the accommodating space.

Hereinafter, an operating state of the clutch device for an automatic transmission according to an embodiment of the present invention will be described in detail.

7 and 8 are operational diagrams schematically illustrating an operating state of a clutch device for an automatic transmission according to an embodiment of the present invention.

Referring to FIG. 7 , the oil path through the first supply unit 600 forms an operating pressure passage for operating the piston unit 300 . More specifically, oil supplied through the oil passage of the rear cover 10 flows into the first supply unit 600 . Oil introduced into the first supply unit 600 is first transported along the axial direction of the driving member 100 by the first supply passage 610 . Thereafter, the oil flows into the first connection passage 620 , and the first connection passage 620 transfers the oil in the radial direction of the driving member 100 by the centrifugal force caused by the rotation of the driving member 100 .

The oil discharged from the first connection passage 620 flows into the first sleeve passage 810 of the first branch part 800 . Thereafter, the first sleeve flow path 810 transfers the oil to the first boss flow path 820 by the centrifugal force caused by the rotation of the driving member 100 . In this case, the first sleeve flow passage 810 may be directly transferred to the first boss flow passage 820, and may be transmitted to the first boss flow passage 820 indirectly through the receiving space of the boss 220.

The oil discharged from the first boss oil passage 820 is supplied to the first pressure chamber 400 and forms a hydraulic pressure on one side of the piston unit 300 . Accordingly, the clutch piston 310 of the piston unit 300 presses the disk unit 40 while moving in a direction toward the disk unit 40 .

Referring to FIG. 8 , the oil path through the second supply unit 700 forms a balance pressure oil path of the piston unit 300 and a lubricating oil path for lubricating parts of the clutch device for an automatic transmission according to the present invention. More specifically, oil supplied through the oil passage of the rear cover 10 flows into the second supply unit 700 . The oil introduced into the second supply unit 700 is first transported along the axial direction of the driving member 100 by the second supply passage 710 . Thereafter, the oil flows into the second connection passage 720 , and the second connection passage 720 transfers the oil in the radial direction of the driving member 100 by the centrifugal force caused by the rotation of the driving member 100 .

The oil discharged from the second connection passage 720 flows into the second sleeve passage 910 of the second branch 900 . Then, the second sleeve flow path 910 transfers the oil to the second boss flow path 920 by the centrifugal force caused by the rotation of the driving member 100 . In this case, the second sleeve flow path 910 may directly transmit the material to the second boss flow path 920 , and it is also possible to indirectly transfer the material to the second boss flow path 920 through the accommodation space of the boss 220 .

The oil discharged from the second boss oil passage 920 is supplied to the second pressure chamber 500 and forms a hydraulic pressure on the other side of the piston part 300 . Accordingly, the oil supplied to the second pressure chamber 500 offsets the residual operating force applied to the piston unit 300 by the centrifugal force caused by the high-speed rotation of the residual oil remaining in the first pressure chamber 400 . In addition, the oil discharged from the second pressure chamber 500 is used as lubricating oil as it is supplied to each component of the clutch device for an automatic transmission according to the present invention.

According to the above description, the clutch device for an automatic transmission according to the present invention can supply oil by utilizing the driving member by the first supply unit and the second supply unit, thereby preventing an increase in electric field due to the addition of a separate oil flow path structure. Vehicle mountability can be improved.

In addition, the clutch device for an automatic transmission according to the present invention has a simple structure and separates the operating pressure passage and the balance pressure passage flowing into the first pressure chamber and the second pressure chamber from each other, thereby reducing installation and manufacturing costs. have.

Although the present invention has been described with reference to an embodiment shown in the drawings, this is merely exemplary, and those skilled in the art can make various modifications and equivalent other embodiments therefrom. will understand

Therefore, the true technical protection scope of the present invention should be determined by the claims below.

10: rear cover 20: retainer
30: hub 40: disk unit
41: clutch plate 42: clutch disk
50: planetary gear set 100: driving member
200: boss part 210: sleeve
220: boss 300: piston part
310: clutch piston 320: balance piston
330: return spring 400: first pressure chamber
500: second pressure chamber 600: first supply unit
610: first supply passage 620: first connection passage
700: second supply unit 710: second supply passage
720: second connection path 800: first branch
810: first sleeve flow path 820: first boss flow path
900: second branch 910: second sleeve flow
920: 2nd Boss Euro

Claims (6)

a driving member to which the driving force of the engine is input;
a boss portion coupled to the driving member and rotated;
a piston unit that is movably coupled to the boss unit and pressurizes the disk unit;
a first supply unit and a second supply unit installed on the driving member and receiving oil from the rear cover;
a first branching part and a second branching part installed in the boss part and communicating with the first supplying part and the second supplying part, respectively;
a first pressure chamber disposed on one side of the piston unit and communicating with the first branch unit to form hydraulic pressure on one side of the piston unit; and
and a second pressure chamber disposed on the other side of the piston and communicating with the second branch to form hydraulic pressure on the other side of the piston.
According to claim 1,
The first supply unit,
a first supply passage disposed inside the driving member and extending in an axial direction of the driving member; and
A first connection passage connected to the first supply passage and extending in a radial direction of the driving member to communicate with the first branching part;
The second supply unit,
a second supply passage disposed inside the driving member, extending in an axial direction of the driving member, and spaced apart from the first supply part; and
and a second connection passage connected to the second supply passage and extending in a radial direction of the driving member to communicate with the second branching portion.
According to claim 2,
The clutch device for an automatic transmission according to claim 1 , wherein the first connection passage and the second connection passage are spaced apart from each other in a circumferential direction of the driving member.
According to claim 2,
The clutch device for an automatic transmission according to claim 1 , wherein the first connection passage and the second connection passage are spaced apart from each other in an axial direction of the driving member.
According to claim 1,
The boss part,
a sleeve coupled to an outer circumferential surface of the driving member; and
A boss coupled to the outer circumferential surface of the sleeve and movably coupled to the piston unit; includes;
The clutch device for an automatic transmission according to claim 1 , wherein the first branch part and the second branch part pass through the sleeve and the boss and are spaced apart from each other.
According to claim 5,
The first branch,
a first sleeve passage extending in a radial direction of the sleeve and communicating with the first supply part; and
A first boss passage extending in the radial direction of the boss and communicating with the first sleeve passage and the first pressure chamber;
The second branch,
a second sleeve passage that is spaced apart from the first sleeve passage, extends in a radial direction of the sleeve, and communicates with the second supply part; and
and a second boss passage extending in a radial direction of the boss and communicating with the second supply unit and the second pressure chamber.

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