KR20200079737A - Dual wet clutch - Google Patents

Abstract

The present invention relates to a dual wet clutch capable of solving difficulties in design for the installation of a piston part as well as widening a pressure effect area of the piston part, and enabling accurate hydraulic and stroke control. To achieve the purpose, the dual wet clutch includes: an input part receiving a rotation force of an input shaft; an outer plate part mounted on an outer side in a radial direction of the input part; an outer disc part placed in the outer plate part; a first output part connected with the outer disc part; an inner plate part mounted on an inner side in a radial direction of the input part; an inner disc part placed in the inner plate part; a second output part connected with the inner disc part; a housing at least incorporating the input part, the outer plate part, the outer disc part, the first output part, the inner plate part, the inner disc part and the second output part, and having a predetermined space to enable rotation relative to the input shaft, and a cover finishing the housing; a first piston part provided in the housing to press the outer plate part; and a second piston part provided in the cover to press the inner plate part.

Description

Dual wet clutch{DUAL WET CLUTCH}

The present invention relates to a dual wet clutch, and more specifically, it is possible to achieve a reduction in the overall length of the bearing related to the clutch release using a needle roller bearing, and to increase the pressure working area of the piston portion to operate with a small working hydraulic pressure. It relates to a dual wet clutch.

In general, the dual clutch transmission is composed of one dual clutch and two transmission parts, and is usually of an intermediate shaft structure.

Therefore, the gear shift without interruption of driving force can be realized by the over lapping operation of the two friction clutches of the concentric input shaft of the transmission and the dual clutch connected thereto.

Meanwhile, recently, a wet multi-plate clutch is mainly used, and the dual wet clutch is installed in a clutch assembly and operated by a cylinder and a piston rotating like a clutch, or a cylinder/piston installed concentrically with a transmission input shaft inside the clutch housing. It can be configured to operate by.

As an example of a conventional dual wet clutch, Korean Patent Publication No. 10-2018-0016297 discloses a'dual-clutch mechanism and a transmission system including such a dual-clutch mechanism'.

Briefly describing the dual clutch mechanism, as shown in FIG. 1, first and second actuators 12 and 13 for the first and second friction clutches 10 and 11 are disposed on the transmission side, and the first , 2 output disc holders (14, 15) are located on the engine side.

In addition, the first friction clutch 10 located outside with respect to the radial direction of the dual clutch transmission is connected to the first input shaft 16, and the second friction clutch 11 located inside is connected to the second input shaft 17. It is configured as possible.

As described above, when the first and second actuators 12 and 13 are located on the transmission side and the first and second output disk holders 14 and 15 are located on the engine side, when the dry dual clutch transmission is wetted This is the most typical and easy design.

However, as the first and second actuators 12 and 13 for operating the first and second friction clutches 10 and 11 are all disposed on the transmission side, the first and second actuators 12 and 13 are spaced at a narrow interval. Since there is no choice but to be disposed, the hydraulic working area of the first and second actuators 12 and 13 is limited, and there is a problem that the hydraulic pressure of the first and second actuators 12 and 13 must be used as a high hydraulic pressure. .

In addition, as the bearing related to the clutch release is composed of a traditional ball bearing, there is a limitation in that the overall length of the clutch is reduced.

Published Patent Publication No. 2018-0016297 (published on February 14, 2018)

An object of the present invention for solving the problems according to the prior art is to solve the design difficulties for installing the piston portion as the first piston portion and the second piston portion are configured to be separated from each side, and the first piston portion It is to provide a dual wet clutch to increase the pressure working area of the and the second piston portion to enable the operation of the piston portion with a low working hydraulic pressure.

In addition, another object of the present invention, the first piston portion and the second piston portion are respectively fixed to the transmission body so as to be inserted into cylinders formed on the inner surfaces of the first and second cylinder blocks, which are components of the housing and the cover, which are configured not to rotate. As assembled, the first piston part and the second piston part are configured to operate the piston in a non-rotating state, thereby preventing the pressure drop of the operating oil due to the outflow of hydraulic oil, thereby providing a dual wet clutch capable of realizing accurate hydraulic pressure and stroke control. In the offer.

In order to solve the above technical problem, the dual wet clutch of the present invention includes: an input unit to which the rotational force of the input shaft is transmitted; An outer plate portion mounted to the radially outer side of the input portion; An outer disk portion disposed on the outer plate portion; A first output part connected to the outer disk part; An inner plate portion mounted on the radially inner side of the input portion; An inner disc portion disposed on the inner plate portion; A second output part connected to the inner disk part; At least the input unit, the outer plate portion, the outer disc portion, the first output portion, the inner plate portion, the inner disc portion and the second output portion are built in, and the housing and the housing having a predetermined space to enable relative rotation with respect to the input shaft. Closing cover; A first piston portion provided in the housing to press the outer plate portion; And a second piston portion provided on the cover to press the inner plate portion.

Preferably, the housing, the housing block; And a first cylinder block assembled at a radially inner end of the housing block, wherein the cover comprises: a cover block; And a second cylinder block assembled at the radially inner end of the cover block.

Preferably, the first piston portion, the first pressure chamber is formed on the inner surface in the longitudinal direction of the first cylinder block connected to the external inlet supply source; A first cylinder formed connected to the first pressure chamber; And a first piston mounted on the first cylinder to generate a pressing force for pressing the outer plate portion.

Preferably, the first piston portion, a first pressing force transmission ring in close contact with the end of the first piston; A first pressing force transmitting member receiving the pressing force of the first pressing force transmitting ring and pressing the outer plate portion; And a first needle roller bearing provided between the first pressing force transmitting ring and the first pressing force transmitting member to enable relative rotation of the first pressing force transmitting ring and the first pressing force transmitting member. have.

Preferably, the second piston portion, the second pressure chamber is formed on the inner surface in the longitudinal direction of the second cylinder block connected to the external inlet supply source; A second cylinder formed connected to the second pressure chamber; And a second piston mounted on the second cylinder to generate a pressing force for pressing the inner plate portion.

Preferably, the second piston portion, a second pressing force transmission ring in close contact with the end of the second piston; A second pressing force transmitting member receiving the pressing force of the second pressing force transmitting ring and pressing the inner plate portion; And a second needle roller bearing provided between the second pressing force transmitting ring and the second pressing force transmitting member to enable relative rotation of the second pressing force transmitting ring and the second pressing force transmitting member. have.

Preferably, the input unit is connected to the end of the input shaft, a base supporter formed radially outwardly extended; And a first retainer part connected to an end of the foundation supporter and extending horizontally, an extension part extending radially inward from the first retainer part, and parallel to the first retainer part on a longitudinal inner surface of the extension part. And an extended supporter including a second retainer portion formed to be formed, wherein the outer plate portion is mounted to be located on a radially inner side of the first retainer portion, and the inner plate portion is on a radially inner side of the second retainer portion. It can be configured to be mounted to be located.

Preferably, the first supporter is formed with a plurality of first through holes into which a plurality of first fingers provided in the first pressing force transmitting member are inserted, and an extension of the extending supporter is provided with the second pressing force transmitting member. A plurality of second through-holes into which a plurality of second fingers are inserted is formed, and the first through-hole may be formed radially outside the second through-hole.

The present invention as described above, as the first piston portion and the second piston portion is configured to be installed on the cover disposed in the transmission direction, while the first piston portion is configured to be installed in the housing disposed in the engine direction, the first piston portion and the second Since the piston parts are configured to be separated from each side, there is an advantage that can solve the design difficulties for installing the piston parts. In particular, by configuring the first piston portion and the second piston portion to be separated from each side, the degree of freedom of use of the installation space in a narrow space can be increased, and through this, it is possible to increase the pressure working area of the piston portion, thereby reducing the piston portion It has the advantage of being operable.

In addition, as the first piston part and the second piston part are assembled to be inserted into cylinders formed on the inner surfaces of the first and second cylinder blocks, which are components of the housing and the cover, which are fixed to the transmission body and configured not to rotate, respectively, the first The piston portion and the second piston portion are configured to operate the piston in a non-rotating state, thereby preventing the pressure drop of the operating oil due to the outflow of hydraulic oil, and thus, it is possible to realize accurate hydraulic pressure and stroke control.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the following description.

1 is a side cross-sectional view showing a conventional dual wet clutch.
2 is a perspective view showing a dual wet clutch according to an embodiment of the present invention.
3 is an exploded perspective view showing a dual wet clutch according to an embodiment of the present invention.
4 is a side cross-sectional view showing a side cross-section of a dual wet clutch according to an embodiment of the present invention.
5 is an operation diagram showing a state in which the input shaft rotational force of the dual wet clutch according to an embodiment is output to the first output unit.
6 is an operation diagram showing a state in which the input shaft rotational force of the dual wet clutch according to an embodiment is output to the second output unit.

The present invention can be implemented in various other forms without departing from its technical spirit or main characteristics. Accordingly, the embodiments of the present invention are merely illustrative in all respects and should not be construed as limiting.

Terms such as first and second may be used to describe various components, but the components should not be limited by the terms.

The terms are used only for the purpose of distinguishing one component from other components. For example, the first component may be referred to as a second component without departing from the scope of the present invention, and similarly, the second component may be referred to as a first component.

When a component is said to be'connected' or'connected' to another component, it is understood that other components may be directly connected or connected to the other component, but other components may exist in the middle. It should be.

On the other hand, when a component is said to be'directly connected' or'directly connected' to another component, it should be understood that no other component exists in the middle.

The terms used in this application are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise.

In this application, the terms'include','have','have', etc. are intended to designate the existence of features, numbers, steps, operations, components, parts or combinations thereof described in the specification. Or further features or numbers, steps, actions, components, parts, or combinations thereof, should not be excluded in advance.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person skilled in the art to which the present invention pertains.

Terms such as those defined in a commonly used dictionary should be interpreted as having meanings consistent with meanings in the context of related technologies, and should not be interpreted as ideal or excessively formal meanings unless explicitly defined in the present application. Does not.

In the dual wet clutch according to the present invention, a pair of piston portions 200 and 300 are provided as one piston portion 200 is disposed in the engine direction and the other piston portion 300 is disposed in the transmission direction. Each is configured to be separated on both sides.

For example, the one piston portion 200 is disposed in the housing 110 located in the engine direction, the other piston portion 300 is disposed in the cover 120 located in the transmission direction, a pair of pistons The shapes of the housing 110 and the cover 120 can be variously modified as long as the parts 200 and 300 can be configured to be separated on both sides.

Meanwhile, oil passages OP1, OP2, OP3, and OP4 for supplying hydraulic oil for operating the pair of piston parts 200 and 300 are formed in the housing 110 and the cover 120, and the oil passage The hydraulic oil is selectively supplied through (OP1, OP2, OP3, OP4) to selectively operate the pair of piston parts 200 and 300 as pressure is applied.

In the description of the present invention, when it is determined that a detailed description of related known technologies may obscure the subject matter of the present invention, the detailed description will be omitted.

On the other hand, in the description of the present embodiment,'radius radial outside' refers to a portion distant from the input shaft 10a based on the radial direction of the dual clutch transmission, and'radial radial inside' refers to the radial direction of the dual clutch transmission. Refers to the portion close to the input shaft 10a.

Further,'inner in the longitudinal direction' refers to a portion close to the center of the space consisting of the housing 110 and the cover 120 based on the longitudinal direction of the input shaft 10a of the dual clutch transmission, and'outer in the longitudinal direction' refers to the dual clutch It refers to a portion distant from the center of the space consisting of the housing 110 and the cover 120 based on the longitudinal direction of the input shaft 10a of the transmission.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings, but the same or corresponding elements are assigned the same reference numbers regardless of the reference numerals, and overlapping descriptions thereof will be omitted.

The dual wet clutch according to the exemplary embodiment of the present invention includes a housing 110 and a cover 120 configured to form a predetermined closed space, as shown in FIGS. 2 to 4.

In the closed space formed by the housing 110 and the cover 120, an input unit 10b, an outer plate unit 20a, an outer disk unit 20b, a first output unit 30, an inner plate unit 40a, The inner disk portion 40b, the second output portion 50, the first piston portion 200, and the second piston portion 300 are built.

First, the housing 110 and the cover 120 will be described.

The housing 110 and the cover 120 include the input part 10b, the outer plate part 20a, the outer disk part 20b, the first output part 30, the inner plate part 40a, the inner disk part ( 40b) and the second output part 50 are components that form a predetermined closed space.

For example, the housing 110 is formed in a cylindrical shape with one side open, a flange for bolting is provided on the outer circumference, and the cover 120 is formed in a plate shape that closes the opening of the housing 110. A flange for bolting may be provided on the outer periphery.

Meanwhile, the housing 110 includes a housing block 111 and a first cylinder block 112 assembled to a radially inner end of the housing block 111, and the cover 120 includes a cover block ( 121) and the second cylinder block 122 assembled to the radially inner end of the cover block 121.

For example, a stepped step portion is formed at an inner end of the housing block 111, and a step portion formed at an inner end of the housing block 111 is faced at an outer end of the first cylinder block 112. A corresponding stepped portion is formed, and the fastening may be performed as each stepped portion of the housing block 111 and the first cylinder block 112 are engaged and brought into close contact.

In addition, for example, a stepped step portion is formed at an inner end of the cover block 121, and a step portion formed at an inner end of the cover block 121 is formed at an outer end of the second cylinder block 122. A corresponding step portion is formed to face each other, and fastening may be performed as each step portion of the cover block 121 and the second cylinder block 122 is engaged and brought into close contact.

According to the configuration of the housing 110 and the cover 120 as described above, the housing 110 is composed of a housing block 111 and the first cylinder block 112, the cover 120 is the cover block The input unit 10b, the outer plate portion 20a, the outer disk portion 20b, the first output portion 30, and the inner plate portion 40a as separated from the 121 and the second cylinder block 122 , It is easy to assemble internal components such as the inner disk portion 40b and the second output portion 50.

Next, the input unit 10b will be described.

The input unit 10b is integrally connected to the input shaft 10a and configured to receive the rotational force of the input shaft 10a.

Specifically, as shown in FIGS. 3 and 4, the input unit 10b includes a basic supporter 10b-1 and an extended supporter 10b-2.

The foundation supporter 10b-1 is connected to the input shaft 10a by a welding method or the like, specifically, integrally connected to an end of the input shaft 10a to extend radially outward, and the input shaft 10a ).

A plurality of first through holes 10b-h1 into which a plurality of first fingers 251 provided in the first pressing force transmitting member 250 are inserted are formed on the outside of the foundation supporter 10b-1. Accordingly, when the input shaft 10a is rotated, the first pressing force transmitting member 250 may rotate together in response to the rotation of the basic supporter 10b-1.

The extension supporter 10b-2 is a component having a first retainer portion (a), an extension portion (b), and a second retainer portion (c) integrally formed.

The first retainer portion (a) of the extended supporter (10b-2) is a portion extending horizontally by being connected to or fastened to an end of the basic supporter (10b-1), wherein the first retainer portion (a) is the foundation It rotates together with the supporter 10b-1.

The extension part (b) is a part integrally extending from the first retainer part (a), and is formed to extend radially inward at an end of the first retainer part (a).

The second retainer part (c) is a part that extends integrally from the extension part (b), and is formed to be parallel to the first retainer part (a) in the middle of the longitudinal inner surface of the extension part (b).

A plurality of second through holes 10b-h2 into which the plurality of second fingers 351 provided in the second pressing force transmitting member 350 are inserted are formed in the extension part b of the extension supporter 10b-2. And, the second through-hole (10b-h2) is formed in the radially inner side than the first through-hole (10b-h1).

The rotational force transmitted to the basic supporter 10b-1 when the input shaft 10a is rotated by the configuration of the second finger 351 and the second through hole 10b-h2 described above is the extended supporter 10b-2 ), the extension supporter 10b-2 can rotate, and the second pressing force transmission member 350 can rotate together in response to the rotation of the extension supporter 10b-2.

That is, when the input shaft 10a is rotated, the basic supporter 10b-1 and the extended supporter 10b-2 rotate together, and the first through hole 10b-h1 of the basic supporter 10b-1 rotates. The first pressing force transmitting member 250 provided with the inserted first finger 251 and the second finger 351 inserted into the second through hole 10b-h2 of the extension supporter 10b-2 are provided. The second pressing force transmitting member 350 rotates together, and as a result, when the input shaft 10a rotates, the basic supporter 10b-1, the extending supporter 10b-2, and the first pressing force transmitting member 250 And the second pressing force transmitting member 350 are all rotated together.

According to the configuration of the input unit 10b as described above, the rotational force transmitted to the input shaft 10a is transmitted to the basic supporter 10b-1, and the rotational force transmitted to the basic supporter 10b-1 is extended supporter 10b -2), and consequently, the input shaft 10a, the base supporter 10b-1, and the extended supporter 10b-2 rotate together.

In addition, the first pressing force transmitting member 250 may rotate in response to the rotation of the foundation supporter 10b-1 by the first through hole 10b-h1 and the first finger 251, The second pressing force transmitting member 350 may rotate in response to the rotation of the foundation supporter 10b-1 by the second through hole 10b-h2 and the second finger 351.

Next, the outer plate portion 20a, the outer disk portion 20b, and the first output portion 30 will be described.

The outer plate portion 20a and the outer disc portion 20b are components constituting the friction clutch disposed on the radially outer side.

The outer plate portion 20a is mounted to be located on the radially outer side of the input portion 10b, specifically, of the first retainer portion (a) of the extension supporter 10b-2 constituting the input portion 10b. A plurality of plates are provided in a state spaced apart by a predetermined gap on the inner surface of the radial reflection.

The outer disk portion 20b is configured to be disposed on the outer plate portion 20a, and specifically, a plurality of first discs respectively disposed between a plurality of first plates constituting the outer plate portion 20a are provided. It is configured to be connected to one output unit 30 and mounted.

On the other hand, the outer disk portion 20b is provided with a first friction plate for generating friction with the outer plate portion 20a.

Accordingly, when the first finger 251 of the first pressing force transmitting member 250 presses one side of the outer plate portion 20a, the plurality of first plates, the plurality of first disks, and the plurality of firsts As the friction plates are compressed with each other, the frictional force is increased, whereby the rotational force of the extension supporter 10b-2 can be output through the first output unit 30.

Meanwhile, a first return spring S1 is provided between the first pressing force transmitting member 250 and the foundation supporter 10b-1.

As described above, the friction clutch composed of the plurality of first plates, the plurality of first discs, and the plurality of first friction plates is configured to be the same or similar to the known friction clutch configuration.

According to the configuration of the outer plate portion 20a, the outer disk portion 20b and the first output portion 30 as described above, as shown in Figure 5, the first pressing force transmission member 250 of the When the outer plate portion 20a and the outer disc portion 20b are compressed by one finger 251, the rotational force of the base supporter 10b-1 is the outer plate portion 20a and the outer disc portion 20b ) Can be output to the first output unit 30, through which the first output shaft (not shown) connected to the first output unit 30 receives the rotational force of the input shaft 10a to rotate.

Next, the inner plate portion 40a, the inner disc portion 40b, and the second output portion 50 will be described.

The inner plate portion 40a and the inner disc portion 40b are components constituting the friction clutch disposed in the radially inner side.

The inner plate portion 40a is mounted to be positioned inside the radially inward direction of the input portion 10b, and specifically, of the second retainer portion c of the extension supporter 10b-2 constituting the input portion 10b. A plurality of second plates are provided on the inner surface of the semi-reflective spaced apart by a predetermined gap.

The inner disk portion 40b is configured to be disposed on the inner plate portion 40a, and specifically, a plurality of second discs respectively disposed between a plurality of second plates constituting the inner plate portion 40a are provided. 2 is configured to be connected to the output unit 50 and mounted.

On the other hand, the inner disk portion 40b is provided with a second friction plate for generating friction with the inner plate portion 30a.

Accordingly, when the second finger 351 of the second pressing force transmitting member 350 presses one side of the inner plate portion 40a, the plurality of second plates, the plurality of second disks, and the plurality of second As the friction plates are compressed with each other, the frictional force is increased, whereby the rotational force of the extension supporter 10b-2 can be output through the second output unit 50.

Meanwhile, a second return spring S2 is provided between the second pressing force transmitting member 350 and the extension part b constituting the extension supporter 10b-2.

As described above, the friction clutch composed of the plurality of second plates, the plurality of second disks, and the plurality of second friction plates is configured to be the same or similar to the known friction clutch configuration.

According to the configuration of the inner plate portion 40a, the inner disc portion 40b and the second output portion 50 as described above, as shown in FIG. 6, the second pressing force transmitting member 350 is made When the inner plate portion 40a and the inner disc portion 40b are compressed by the two fingers 351, the rotational force of the extended supporter 10b-2 is the inner plate portion 40a and the inner disc portion 40b. ) Can be output to the second output unit 50, through which the second output shaft (not shown) connected to the second output unit 50 receives the rotational force of the input shaft 10a and rotates.

Next, the first piston unit 200 will be described.

The first piston portion 200 is provided in the housing 110 as a component that selectively presses the outer plate portion 20a, specifically, the first piston portion 200 is the first cylinder block It may be provided on the inner surface in the longitudinal direction of (112).

The first piston unit 200 includes a first pressure chamber 210, a first cylinder 220, a first piston 230, a first pressing force transmitting ring 240, a first pressing force transmitting member 250 and a first It comprises one thrust bear (260).

The first pressure chamber 210 is formed on the inner surface in the longitudinal direction of the first cylinder block 112, the first oil passage (OP1) and the first oil passage (OP1) formed in the housing block 111 It is connected to an external inflow supply source through a second oil passage OP2 formed in the first cylinder block 112 so as to communicate with.

The first cylinder 220 is a groove portion formed by being connected to the first pressure chamber 210, and the first piston 230 is inserted and positioned.

The first piston 230 is mounted on the first cylinder 220 and functions as an actuator that generates a pressing force for pressing the outer plate portion 20a.

For example, when oil from an external inflow supply source is supplied to the first pressure chamber 210 through the first oil passage OP1 and the second oil passage OP2, hydraulic pressure is applied, and the first piston 230 ) Is pushed by the hydraulic pressure, thereby generating a pressing force.

The first pressing force transmission ring 240 is a portion that is in close contact with an end of the first piston 230, and a first bending surrounding the first piston 230 is formed on an outer circumference of the first pressing force transmission ring 240. A portion 240a is formed and is tightly assembled with the first piston 230.

The first pressing force transmitting member 250 is a component that receives the pressing force of the first pressing force transmitting ring 240 and presses the outer plate portion 20a.

The first needle roller bearing 260 includes the first pressing force transmitting ring 240 and the first pressing force transmitting member to enable relative rotation of the first pressing force transmitting ring 240 and the first pressing force transmitting member 250. It is a component provided between (250).

According to the configuration of the first piston unit 200 as described above, the oil from the external inflow supply source is supplied to the first pressure chamber 210 through the first oil passage OP1 and the second oil passage OP2. When the hydraulic pressure is applied, as shown in FIG. 5, the first piston 230 is pushed by the hydraulic pressure to generate a pressing force, and the first pressing force transfer ring by the first piston 230 ( 240), the first needle roller bearing 260 and the first pressing force transmitting member 250 are simultaneously pushed.

Due to this, the first finger 251 of the first pressing force transmitting member 250 presses one side of the outer plate portion 20a, and consequently, the outer plate portion 20a and the outer disc portion 20b ) Are compressed with each other so that the rotational force of the input shaft 10a can be transmitted to the first output shaft (not shown) connected to the first output unit 30.

Next, the second piston portion 300 will be described.

The second piston portion 300 is provided on the cover 120 as a component that selectively presses the inner plate portion 40a, specifically, the second piston portion 300 is the second cylinder block It may be provided on the inner surface in the longitudinal direction of (122).

The second piston part 300 includes a second pressure chamber 310, a second cylinder 320, a second piston 330, a second pressing force transmitting ring 340, a second pressing force transmitting member 350 and a second It includes two needle roller bearings (360).

The second pressure chamber 310 is formed on the inner surface in the longitudinal direction of the second cylinder block 122, the third oil flow path OP3 and the third oil flow path OP3 formed in the cover block 121. It is connected to an external inflow supply source through a fourth oil passage OP4 formed in the second cylinder block 122 so as to communicate with.

The second cylinder 320 is a groove portion formed by being connected to the second pressure chamber 310, and the second piston 330 is inserted and positioned.

The second piston 330 is mounted on the second cylinder 320 and functions as an actuator that generates a pressing force for pressing the inner plate portion 40a.

For example, when the oil of the external inflow supply source is supplied to the second pressure chamber 310 through the third oil passage OP3 and the fourth oil passage OP4, hydraulic pressure is applied, and the second piston 330 ) Is pushed by the hydraulic pressure, thereby generating a pressing force.

The second pressing force transmitting ring 340 is a portion that is in close contact with an end of the second piston 330, and a second bending surrounding the second piston 330 is formed on an outer circumference of the second pressing force transmitting ring 340. A portion 340a is formed and is tightly assembled with the second piston 330.

The second pressing force transmitting member 350 is a component that receives the pressing force of the second pressing force transmitting ring 340 and presses the inner plate portion 40a.

The second needle roller bearing 360 includes the second pressing force transmitting ring 340 and the second pressing force transmitting member to enable relative rotation of the second pressing force transmitting ring 340 and the second pressing force transmitting member 350. It is a component provided between (350).

According to the configuration of the second piston unit 300 as described above, the oil from the external inflow supply source is supplied to the second pressure chamber 310 through the third oil passage OP3 and the fourth oil passage OP4. When the hydraulic pressure is applied, as shown in FIG. 6, the second piston 330 is pushed by the hydraulic pressure to generate a pressing force, and the second pressing force transmission ring by the second piston 330 ( 340), the second needle roller bearing 360, the second pressing force transmission member 350 is pushed at the same time.

Due to this, the second finger 351 of the second pressing force transmitting member 350 presses one side of the inner plate portion 40a, and consequently, the inner plate portion 40a and the inner disc portion 40b. ) Is compressed with each other so that the rotational force of the input shaft 10a can be transmitted to a second output shaft (not shown) connected to the second output unit 50.

The housing 110 and the cover 120, the first piston part 200, the second piston part 300, and the first pressing force transmission ring constituting the dual wet clutch according to the embodiment of the present invention as described above (240), the second pressing force transmitting ring 340 is a non-rotating component that does not rotate, and includes an input unit 10b including the input shaft 10a, a first pressing force transmitting member 250, and a second pressing force transmitting member The 350, the first output unit 30, and the second output unit 50 are rotation components configured to be rotatable.

In order to enable relative rotation between the above-described non-rotating component and the rotating component, a first bearing B1 is provided between the first cylinder block 112 and the input shaft 10a, and the first bearing ( B1) is provided with a first oil seal OS1 that prevents oil from flowing outward.

Meanwhile, a third needle roller bearing 281 is provided between the rotation shaft and the first output part 30, and a fourth needle is provided between the first output part 30 and the second output part 50. A roller bearing 282 is provided.

In addition, the front end portion of the bushing (bs) is located between the end side of the extension portion (b) constituting the extension supporter (10b-2) and the second output portion (50), the front end portion of the bushing (bs) A second bearing B2 is provided between the outer surface and the extended portion b of the extended supporter 10b-2, and between the inner surface of the front end portion of the bushing bs and the second output portion 50. In the fifth needle roller bearing 283 is provided.

On the other hand, the inside of the bushing (bs) is composed of a first output shaft (not shown) that is fastened to the first output unit 30, a hollow shape surrounding the outer circumference of the first output shaft, and the second output A second output shaft (not shown) that is fastened to the unit 50 is configured to be coaxial, respectively, and is inserted into the second output shaft at the center of the second cylinder block 122 to prevent oil from leaking. Oil seal OS2 is provided.

Company A Dual Clutch Products
(Comparative example) Prototype Dual Clutch Prototype
(Example) Outside
clutch Medial
clutch Outside
clutch Medial
clutch clutch
work
Requirement (Kgf)
294.43
268.89
294.43
268.89 piston
Outside diameter
(mm)
115
77
100
86 piston
Inside diameter
(mm)
102
58
70
50 piston
Working hydraulic
(Bar)
41.75
41.93
23.09
21.97

On the other hand, the dual wet clutch according to an embodiment of the present invention as described above, the first piston portion is configured to be installed in the housing disposed in the engine direction and the second piston portion is configured to be installed in the cover disposed in the transmission direction As described above, as the first piston portion and the second piston portion are configured to be separated on both sides, the degree of freedom of use of the installation space in a narrow space can be increased, and thereby the area of pressure action of the piston portion can be widened. As can be seen through, compared to the conventional product in which the piston portion is arranged on both sides, there is an advantage that the piston portion can be operated with much less hydraulic force.

Although the present invention has been described with reference to the accompanying drawings and preferred embodiments, it is apparent to those skilled in the art that many various and obvious modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should be interpreted by the claims described to include many of these modifications.

10a: input shaft 10b: input
10b-1: Basic supporter 10b-2: Extended supporter
10b-h1: 1st through hole 10b-h2: 2nd through hole
20a: outer plate portion 20b: outer disc portion
30: first output portion 40a: inner plate portion
40b: inner disk portion 50: second output portion
110: housing 111: housing block
112: first cylinder block 120: cover
121: cover block 122: second cylinder block
200: first piston 210: first pressure chamber
220: first cylinder 230: first piston
240: first pressing force transmitting ring 250: first pressing force transmitting member
251: first finger 260: first needle roller bearing
300: second piston portion 310: second pressure chamber
320: second cylinder 330: second piston
340: second pressing force transmission ring 350: second pressing force transmission member
351: second finger 360: second needle roller bearing
a: 1st retainer part b: Extension part
c: Second retainer section

Claims (8)

An input unit to which the rotational force of the input shaft is transmitted;
An outer plate portion mounted to the radially outer side of the input portion;
An outer disk portion disposed on the outer plate portion;
A first output part connected to the outer disk part;
An inner plate portion mounted on the radially inner side of the input portion;
An inner disc portion disposed on the inner plate portion;
A second output part connected to the inner disk part;
At least the input unit, the outer plate portion, the outer disc portion, the first output portion, the inner plate portion, the inner disc portion and the second output portion are built in, and the housing and the housing having a predetermined space to enable relative rotation with respect to the input shaft. Closing cover;
A first piston portion provided in the housing to press the outer plate portion; And
Dual wet clutch comprising a; provided on the cover a second piston portion for pressing the inner plate portion. According to claim 1,
The housing,
Housing block; And a first cylinder block assembled to the radially inner end of the housing block.
The cover,
Cover block; And a second cylinder block assembled at the radially inner end of the cover block. According to claim 2,
The first piston portion,
A first pressure chamber formed on a longitudinal inner surface of the first cylinder block and connected to an external inflow supply source;
A first cylinder formed connected to the first pressure chamber; And
And a first piston mounted on the first cylinder to generate a pressing force for pressing the outer plate portion. According to claim 3,
The first piston portion,
A first pressing force transmission ring closely supported to the end of the first piston;
A first pressing force transmitting member receiving the pressing force of the first pressing force transmitting ring and pressing the outer plate portion; And
And a first needle roller bearing provided between the first pressing force transmitting ring and the first pressing force transmitting member to enable relative rotation of the first pressing force transmitting ring and the first pressing force transmitting member. Dual wet clutch. According to claim 2,
The second piston portion,
A second pressure chamber formed on a longitudinal inner surface of the second cylinder block and connected to an external inflow supply source;
A second cylinder formed connected to the second pressure chamber; And
And a second piston mounted on the second cylinder to generate a pressing force for pressing the inner plate portion. The method of claim 5,
The second piston portion,
A second pressing force transmission ring closely supported to the end of the second piston;
A second pressing force transmitting member receiving the pressing force of the second pressing force transmitting ring and pressing the inner plate portion; And
And a second needle roller bearing provided between the second pressing force transmitting ring and the second pressing force transmitting member to enable relative rotation of the second pressing force transmitting ring and the second pressing force transmitting member. Dual wet clutch. According to claim 4,
The input unit,
A foundation supporter connected to an end of the input shaft and extending radially outward; And a first retainer part connected to an end of the foundation supporter and extending horizontally, an extension part extending radially inward from the first retainer part, and parallel to the first retainer part on a longitudinal inner surface of the extension part. It is configured to include, including; an extended supporter including a second retainer portion formed
The outer plate portion is mounted to be positioned on the radially inner surface of the first retainer portion, and the inner plate portion is configured to be mounted to be located on the radially inner surface of the second retainer portion. The method of claim 7,
A plurality of first through-holes into which the plurality of first fingers provided in the first pressing force transmitting member are inserted are formed in the foundation supporter,
A plurality of second through-holes into which a plurality of second fingers provided in the second pressing force transmitting member are inserted are formed in the extension of the extension supporter,
The first through hole is a dual wet clutch, characterized in that formed in the radially outer side than the second through hole.

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