KR101763020B1 - Wet type multi-plate clutch with lubrication function operated together with piston - Google Patents

Wet type multi-plate clutch with lubrication function operated together with piston Download PDF

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Publication number
KR101763020B1
KR101763020B1 KR1020150112565A KR20150112565A KR101763020B1 KR 101763020 B1 KR101763020 B1 KR 101763020B1 KR 1020150112565 A KR1020150112565 A KR 1020150112565A KR 20150112565 A KR20150112565 A KR 20150112565A KR 101763020 B1 KR101763020 B1 KR 101763020B1
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KR
South Korea
Prior art keywords
clutch
disc
piston
friction
input shaft
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Application number
KR1020150112565A
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Korean (ko)
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KR20170019015A (en
Inventor
김은희
Original Assignee
현대다이모스(주)
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Priority to KR1020150112565A priority Critical patent/KR101763020B1/en
Publication of KR20170019015A publication Critical patent/KR20170019015A/en
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Publication of KR101763020B1 publication Critical patent/KR101763020B1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D13/00—Friction clutches
    • F16D13/58—Details
    • F16D13/74—Features relating to lubrication
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D13/00—Friction clutches
    • F16D13/22—Friction clutches with axially-movable clutching members
    • F16D13/38—Friction clutches with axially-movable clutching members with flat clutching surfaces, e.g. discs
    • F16D13/385—Friction clutches with axially-movable clutching members with flat clutching surfaces, e.g. discs double clutches, i.e. comprising two friction disc mounted on one driven shaft
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2300/00—Special features for couplings or clutches
    • F16D2300/06—Lubrication details not provided for in group F16D13/74

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)

Abstract

The present invention provides a stable supply path of oil towards the contact area between the friction disc and the clutch disc of the multi-disc clutch and the supply of oil through the established supply path interlocks with the axial displacement of the piston for engagement of the clutch, The present invention has been made in view of the above problems, and it is an object of the present invention to provide a wet type multi-disc clutch having a piston-related lubrication function that can effectively reduce wear and heat generation of a pacing occurring between a friction disc and a clutch disc when a clutch is engaged.
The multi-plate clutch includes a plurality of friction discs 10 spline-coupled to the input shaft 26, a piston 12 mounted on the input shaft 26 so as to be axially movable to press the friction disc 10, A clutch hub (14) fixed to the input shaft (26) for restricting axial movement of the friction disc (10), a plurality of clutch discs (18) alternately installed between the friction discs A clutch drum 16 which is connected to the output shaft by spline coupling the friction disc 10 and the friction disc 10, and a clutch drum 16 which is axially penetrated between the friction disc 10 and between the friction disc 10 and the clutch disc 18 And a lubrication tank portion 20 having a first through hole 20a opened radially toward the contact portion of the contact portion and a closed end portion 20b on one side.

Description

[0001] Wet type multi-plate clutch with lubrication function operated together with piston [0002]

The present invention relates to a wet multi-plate clutch, and more particularly, to a multi-plate clutch that forms a stable supply path of oil toward a contact area between a friction disc and a clutch disc of a multiple disc clutch, To a wet multi-plate clutch having a piston-interlocked lubrication function capable of effectively reducing wear and heat generation between a friction disk and a clutch disk by making it possible to depend on the axial displacement of the piston for the friction disk and the clutch disk.

Generally, a wet multi-plate clutch corresponds to a mechanical element that enables power transmission by selectively connecting two different power transmission elements in an automatic transmission. The wet multi-plate clutch is also used for switching the power transmission mode between the two-wheel drive mode 2H and the four-wheel drive mode 4H in the transfer case.

For example, the multi-plate clutch 5 disclosed in the torque-on-demand device of the four-wheel drive vehicle of Patent No. 10-0864586 is installed between the input shaft 1 and the clutch drum 3 to generate magnetic force by the electromagnet 11 So as to perform a coupling action for power transmission.

To this end, the multi-plate clutch 5 includes a clutch hub 21 spline-coupled to the input shaft 1, a plurality of clutch discs alternately installed between the clutch hub 21 and the clutch drum 3, .

In the conventional multi-plate clutch 5 having such a structure, an appropriate amount of oil is supplied to the contact area between the clutch disc and the clutch plate during tightening to positively reduce wear and heat due to friction between faces.

However, since the oil supplied to the friction portion of the conventional multi-plate clutch 5 is made through the operation of the oil pump or the gearing of the gear teeth, it is difficult to ensure smooth lubrication performance, When the amount of supplied oil is insufficient or the supply of normal oil is not performed, abrasion due to excessive heat is caused on the contact portion between the clutch disc and the clutch plate. If this phenomenon continues, the durability performance of the multi- Resulting in a problem that the four-wheel drive becomes impossible.

Registration No. 10-0864586 Torque-on-demand device of four-wheel drive vehicle

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and it is an object of the present invention to provide a multi-plate clutch in which a stable supply path of oil is formed toward a contact portion between a friction disc and a clutch disc, A wet damping plate having a piston-interlocked lubrication function for effectively reducing wear and heat generation of the pacing occurring between the friction disc and the clutch disc during engagement of the clutch by being able to be dependent on the axial displacement of the piston for engagement. The object of the present invention is to provide a clutch.

According to an aspect of the present invention, there is provided a friction disk including a plurality of friction disks spline-coupled to an input shaft, a piston movably mounted on the input shaft in an axial direction to press the friction disk, A plurality of clutch discs alternately installed between the friction discs, a clutch drum supported on the clutch disc by spline engagement and coupled to the output shaft, A lubricating tank portion having a first through hole radially opened toward a contact portion between the friction disc and the clutch disc and a closed end portion on one side, And a second through hole communicating selectively with the first through hole, An internally lubricated with guide portions, and the lubrication of the cylinder-shaped guide unit is characterized in that it comprises a return spring disposed between the piston and the lubricant tank portion closed end.

In the present invention, the lubricating tank portion is radially spaced from the shaft center of the clutch hub, and the lubricating guide portion is formed to individually receive the lubricating tank portion therein.

In the present invention, the lubricating guide portion may include a shaft coupling portion movably coupled to the input shaft, a plurality of cylindrical members individually accommodating the lubricating tank portion at a radially spaced position with respect to the axial center of the shaft coupling portion, And a pressure receiving portion that is in contact with the piston on the outer circumferential surface of the shaft coupling portion, and the second through hole is formed to be able to communicate with the first through hole according to axial displacement of the piston through the cylindrical member .

A wet multi-disc clutch having a piston-related lubrication function according to the present invention is provided with a path through which oil can be stably supplied toward a contact portion of a face located between a friction disc and a clutch disc, The supply can be effected in conjunction with the axial displacement of the piston for engagement of the multi-plate clutch, thereby effectively reducing the wear and heat generation of the pacing occurring between the friction disk and the clutch disk during fastening of the clutch .

That is, since the piston wears the clutch disc when the wet multi-plate clutch is fastened, the wear and heat generation due to the friction accompanied by the axial displacement of the piston can be effectively suppressed through the supply of oil, Sufficient lubricating and cooling effects can be expected even with a small amount of oil.

Particularly, when the present invention is applied to a transfer case for selectively switching the power transmission path from the two-wheel drive mode to the four-wheel drive mode, the supply of oil can be selectively performed only at the contact point of time between the friction disk and the clutch disk With minimal oil, wear of the pacing due to friction can be prevented and the frictional heat can be effectively cooled.

1 is a half sectional view showing the construction of a wet type multi-plate clutch according to an embodiment of the present invention.
2 is a perspective view showing the configuration of a clutch hub having the lubricating tank portion shown in Fig.
3 is a perspective view showing the configuration of a lubricating guide portion corresponding to the lubricating tank portion shown in Figs. 1 and 2, respectively.
4 is a half sectional view showing an operating state of the wet type multi-plate clutch according to the embodiment of the present invention.

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

1, a wet multi-disc clutch according to the present invention includes a friction disc 10, a piston 12, a clutch hub 14, a clutch drum 16, a clutch disc 18, a lubricating tank section 20, A lubrication guide portion 22, and a return spring 24. [0036] For example, the present invention can be applied to a four-wheel drive transmission case for selectively switching between two different power transmission elements in an automatic transmission, including a transfer case of a four-wheel drive device for switching a power transmission mode between a two-wheel drive 2H and a four- So that the power can be transmitted to the wet multi-plate clutch.

The friction disk 10 is a member which is integrally rotated by being splined to the input shaft 26 in a slip joint manner and radially inwardly free ends of the friction disk 10 are integrally rotated so that a plurality of the friction disk 10 are arranged at a predetermined interval on the outer circumferential surface of the input shaft 26 .

The piston 12 is provided with a radially inner free end movably in the axial direction with respect to the outer circumferential surface of the input shaft 26, and a specific friction disc (not shown) disposed at mutually opposing positions among the plurality of friction discs 10 10). In this case, the piston 12 receives a hydraulic pressure acting on the back surface in the operating direction, a pressing force by a pneumatic pressure, or a pressing force provided by an electromagnetic actuator such as a solenoid.

The clutch hub 14 has a radially inner free end fixedly mounted on the input shaft 26 to restrict axial movement of the friction disk 10 relative to the friction disk 10, And acts as a kind of reaction force element which allows the pressurization to be normally performed. To this end, the clutch hub 14 is installed at a position opposite to the piston 12 with respect to the outer circumferential surface of the input shaft 26 about the plurality of friction discs 10. In the drawing, reference numeral 14a denotes a serration part for spline coupling with the input shaft 26. [

The clutch hub 14 is provided with a hole communicating with the lubricating tank portion 20 through the thickness direction of the member in a direction substantially parallel to the input shaft 26 in order to receive the oil stored in the wet multi- And the hole 14b is closed by the closed end 20b, which will be described later, of the lubrication tank portion 20. [

The clutch drum 16 is composed of a member that is integrally rotated by being splined to the outer circumferential surface of an output shaft (not shown) receiving a driving force corresponding to the input shaft 26 in a slip joint manner. In particular, the clutch drum 16 has a structure in which the radially outer free ends of the plurality of clutch discs 18 can be spline-coupled in a slip joint manner over the entire circumference of the inner circumferential surface.

The clutch disc 18 is a plurality of members that are integrally rotated by being splined to the inner circumferential surface of the clutch drum 16 in a slip-joining manner and radially outward free end portions are alternately arranged between the friction discs 10 Respectively. In this case, at least one of the friction disc (10) and the clutch disc (18) is attached with a friction material, which is a friction material, to a portion where the friction disc (10)

Referring to FIGS. 1 and 2, the lubricating tank unit 20 is a cylinder-shaped member that is installed to pass through the friction discs 10 in an axial direction, one side of which is opened for internal inflow of oil And the free end of the other end is configured to have a closed end portion 20b of a closure form to limit the outflow of oil. The lubricating tank portion 20 has a plurality of first through holes 20a radially formed toward the contact portion between the friction disk 10 and the clutch disk 18 along the entire length of the member. Spaced apart from each other. 2, the lubrication tank 20 is formed in a shape that protrudes in a direction parallel to the input shaft 26 at a position radially spaced apart from the axis center of the clutch hub 14 And is preferably configured to be integral with the clutch hub 14.

The first through hole 20a is formed at a plurality of positions along the entire length of the lubricating tank portion 20 so that the contact portion between the friction disk 10 and the clutch disk 18 . Accordingly, the lubricating tank unit 20 supplies the lubricating oil to the contact portion between the friction disk 10 and the clutch disk 18 through the first through hole 20a, Thereby minimizing wear and heat generation.

1 and 3, the lubrication guide unit 22 includes a plurality of cylindrical cylindrical members 22a capable of individually accommodating the lubrication tank unit 20 therein, And a plurality of second through holes 22b formed in the radial direction of the cylindrical member 22a so as to selectively communicate with the first through holes 20a. In this case, the lubrication guide portion 22 integrally forms a disk-shaped shaft coupling portion 22c for spline coupling in a slip joint manner to the outer peripheral surface of the input shaft 26, And a pressure-receiving portion 22d projecting outwardly for contact with the pressure-receiving portion 22d.

That is, the lubrication guide portion 22 includes a disk-shaped shaft-engaging portion 22c movably coupled to the outer circumferential surface of the input shaft 26, a radially- A cylindrical member 22a which protrudes in a direction parallel to the input shaft 26 at a position of the cylindrical member 22a and is capable of individually accommodating the lubricating tank unit 20 therein; A second through hole 22b that selectively communicates with the first through hole 20a in accordance with the axial displacement of the shaft coupling portion 22c and a second through hole 22b that protrudes outward from the outer circumferential surface of the shaft coupling portion 22c to be in contact with the piston 12. [ And a pressure receiving portion 22d formed integrally therewith.

The return spring 24 is installed to be inserted into the cylindrical member 22a of the lubrication guide portion 22 and is configured to provide an axial restoring force to the lubrication tank portion 20, 24 is provided such that one end thereof is capable of being brought into contact with the piston 12 and the other end thereof is capable of being brought into contact with the closed end 20b of the lubrication tank portion 20. [ To this end, the cylindrical member 22a of the lubrication guide portion 22 is made of a cylinder-shaped member opened in both directions. One end portion of the cylindrical member 22a accommodates the closed end portion 20b of the lubricating tank portion 20, So that the return spring 24 can be received therein.

Accordingly, the wet type multi-plate clutch of the present invention configured as described above has a plurality of friction discs 10 spline-coupled to the outer circumferential surface of the input shaft 26 in a slip-joining manner, and a plurality of friction discs 10 splined to the inner circumferential surface of the clutch drum 16 in slip- A separate lubrication oil supply path is provided through the cylinder-shaped lubrication tank portion 20 toward the contact portion between the plurality of clutch discs 18, and a predetermined amount of oil can always be stored therein, The supply of oil through the supply path can be carried in conjunction with the axial displacement of the piston 12 for engagement of the clutch so that even a minimal amount of oil can provide sufficient lubrication between the friction disc 10 and the clutch disc 18 Cooling effect can be realized.

Particularly, the wet type multi-plate clutch according to the present invention is formed integrally with the clutch hub 14 and the lubricating tank portion 20 fixed to the input shaft 26 by spline coupling, and forms a space in which lubricating oil can be stored And the lubrication guide portion 22 which moves in the axial direction together with the axial displacement of the piston 12 is inserted into the lubrication tank portion 20, The first through hole 20a of the lubricating tank portion 20 and the lubricating guide portion 22 of the lubricating tank portion 20 are moved in the axial direction of the lubrication guide portion 22 accompanied by the axial displacement of the piston 12, And the second through holes 22b of the second oil passage 22 can be mutually communicated with each other. Therefore, the oil can be smoothly supplied to the pacing, and the lubricating and cooling effect on the friction region can be achieved by supplying only the minimum amount of oilIt is good.

The wet multi-plate clutch according to the present invention establishes a stable oil supply path in the lubricating tank portion 20 which axially passes between the friction disk 10 and the clutch disk 18, The oil stored in the portion 20 can be provided to the friction portion of the pacing through the axial movement of the lubricating guide portion 22 accompanying the engagement of the clutch, This allows sufficient lubrication and cooling performance with minimal oil.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be construed as limited to the particular details of the embodiments set forth herein. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the appended claims.

10-Friction Disk 12-Piston
14-clutch hub 16-clutch drum
18-Clutch disc 20-Lubrication tank part
20a - First through hole 20b - Closed end
22-lubrication guide portion 22a-cylindrical member
22b-second through hole 22c -shaft coupling portion
22d-pressure receiving portion 24-return spring
26-input shaft

Claims (5)

A plurality of friction discs 10 splined to the input shaft 26;
A piston (12) provided on the input shaft (26) so as to be movable in an axial direction and pressing the friction disc (10);
A clutch hub (14) fixed to the input shaft (26) and restricting axial movement of the friction disk (10);
A plurality of clutch discs (18) alternately installed between the friction discs (10);
A clutch drum (16) supporting the clutch disc (18) by spline engagement and connected to the output shaft;
A first through hole 20a extending axially between the friction discs 10 and radially opened toward a contact portion between the friction disc 10 and the clutch disc 18 and a second through hole 20b A lubricating tank portion 20 having a closed end 20b; And
And a second through hole (22b) accommodating therein the lubricating tank portion (20) and selectively communicating with the first through hole (20a) in accordance with the axial displacement of the piston (12) (22)
The clutch hub 14 is provided with a hole 14b communicating with the lubricating tank portion 20 while being closed by the closed end portion 20b,
The lubrication guide portion 22 includes an axial coupling portion 22c movably coupled to an outer circumferential surface of the input shaft 26 and a lubrication tank 22c at a position radially spaced from the axial center of the axial coupling portion 22c. A plurality of cylindrical members 22a individually accommodating the piston 20 and a pressure receiving portion 22d in contact with the piston 12 on the outer peripheral surface of the shaft engagement portion 22c,
The second through hole (22b) is formed so as to communicate with the first through hole (20a) through the cylindrical member (22a) according to the axial displacement of the piston (12) .
The method according to claim 1,
The lubricating tank portion 20 is disposed radially spaced apart from the shaft center of the clutch hub 14 and the lubricating guide portion 22 is formed to individually receive the lubricating tank portion 20 therein Wherein the clutch is a multi-plate clutch.
delete delete The method according to claim 1,
Further comprising a return spring (24) installed between the piston (12) and the closed end (20b) of the lubrication tank part (20) inside the lubrication guide part (22).
KR1020150112565A 2015-08-10 2015-08-10 Wet type multi-plate clutch with lubrication function operated together with piston KR101763020B1 (en)

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KR1020150112565A KR101763020B1 (en) 2015-08-10 2015-08-10 Wet type multi-plate clutch with lubrication function operated together with piston

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KR20170019015A KR20170019015A (en) 2017-02-21
KR101763020B1 true KR101763020B1 (en) 2017-07-31

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015135152A (en) 2014-01-17 2015-07-27 本田技研工業株式会社 Frictional engagement device lubrication structure

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100864586B1 (en) 2007-05-17 2008-10-20 다이모스(주) Toque on demand device of a four wheel drive vehicle

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015135152A (en) 2014-01-17 2015-07-27 本田技研工業株式会社 Frictional engagement device lubrication structure

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