DE102015224753B3 - Dry clutch arrangement - Google Patents

Abstract

A dry clutch arrangement (1) comprising at least one pair of friction disks, the friction disk pair having an inner disk (4) and an outer disk, wherein the inner disk (4) is connected to an inner disk carrier and the outer disk is connected to an outer disk carrier (3), wherein the outer disk carrier (3) Is formed substantially cup-shaped and the inner plate (4) and the outer plate within the outer disc carrier (3) are arranged, wherein the outer disc carrier (3) at its cylinder jacket-shaped cylinder portion (3.4) has a plurality of first openings (3.1) and at its bottom (3.3) more second openings (3.2), wherein the inner plate (4) and / or the outer plate each have a plurality of third openings (4.1), wherein the outer plate carrier (3), the inner plate (4) and the outer plate (5) cooperate in such a way that the first openings (3.1) the second openings (3.2) and the third openings (4.1) a Kühlström Training path is formed.

Description

Field of the invention

The present invention relates to a dry clutch arrangement comprising at least one pair of friction disks, the friction disk pair having an inner disk and an outer disk, wherein the inner disk is connected to an inner disk carrier and the outer disk is connected to an outer disk carrier, wherein the outer disk carrier is formed substantially cup-shaped and the inner disk and the outer disk are arranged within the outer disk carrier.

State of the art

In dry clutches, such as multi-plate clutches for all-wheel drive, there is the problem that, especially in a compact design, a thermal overload can occur.

The pamphlets US 1 731 416 A . US 1 706 600 A . US 3 335 834 A such as US 2 290 542 A disclose couplings of the above type.

From the DE 10 2007 036 115 A1 For example, a coupling device is known which has at least one guide vane which extends in the axial direction out of the plane of the coupling disc. The vane is used for fluid redirection in the axial direction, whereby an axial force component is generated, which allows a faster separation of the clutch.

In the EP 1 422 430 B1 a motor vehicle transmission is described with multi-plate clutch, which has a cup-shaped outer disk carrier with a cylinder jacket-shaped cylinder portion, distributed around the circumference alternately Axialstege and axial grooves are arranged. In the axial grooves openings are formed, which are provided for the radial passage of hydraulic oil.

The publication DE 10 2014 2015 380 A1 describes a cooling of a hybrid module with a clutch, wherein the clutch and the hybrid module each having a housing and in the hybrid module housing cooling channels are formed, which are fluid-connected via holes in the clutch housing with the coupling.

The publication WO 2005/064180 A1 describes a clutch plate for a running in oil multi-plate clutch.

The document DE 102 34 822 A1 describes a clutch assembly for a motor vehicle with a cooling system for cooling friction elements.

Summary of the invention

It is an object of the invention to improve dry clutch assemblies of the type mentioned in such a way that a cooling of the dry clutch assemblies, in particular the friction linings of such dry clutch assemblies is made possible in a simple manner.

The object is achieved by a dry clutch arrangement, wherein the dry clutch arrangement is arranged in a closed housing, comprising at least one Reiblamellenpaar, the Reiblamellenpaar having an inner plate and an outer plate, wherein the inner plate is connected to an inner disc carrier and the outer disc with an outer disc carrier, wherein the outer disk carrier is substantially pot-shaped and the inner disk and the outer disk are arranged within the outer disk carrier, the outer disk carrier having a plurality of first openings on a cylinder jacket-shaped cylinder portion and a plurality of second openings on a bottom, the inner disk and / or the outer disk each having a plurality of third openings and have on their outer circumference formed radial recesses, wherein the outer disk carrier, the inner disk and the outer disk cooperate in such a way that over the second openings and the third openings, an inlet path for the cooling medium is formed and the radial recesses form part of a drain path for the cooling medium, wherein the housing on the side facing the outer plate carrier ribbing and the radial recesses, the cooling medium in the direction of the first openings of the Guide outer disk carrier, wherein the cooling medium can flow through the first openings in the direction of the housing.

According to the invention, the dry clutch arrangement is arranged in a housing, wherein the housing is closed. This has the advantage that the friction surfaces are protected from dirt and moisture and the functionality of the dry clutch assembly is not affected.

For cooling the dry clutch arrangement, the air present in the housing is used. The heat transfer thus takes place from the dry clutch arrangement via the air to the housing.

According to the invention, the housing has a ribbing for enlarging the cooling surface of the housing on the side of the housing facing the outer disk carrier. The housing may additionally or alternatively at the External disk carrier side facing away from the housing also have a ribbing.

If necessary, a heat exchanger may also be provided on the housing surface, wherein the heat exchanger uses any known in the art cooling medium.

According to the invention, the arrangement of the first openings, the second openings and the third openings allows a circulation of a cooling medium, preferably ambient air, whereby the path of the cooling medium extends essentially through the first openings, the second openings and the third openings.

The path of the cooling medium formed by the first openings, the second openings and the third openings serves, in particular, to cool the friction plate pair, preferably friction linings of the inner plates and / or the outer plates.

Preferably, the second openings and the third openings form an inlet path for the cooling medium which extends substantially in the axial direction.

According to the present invention, the inner disk and / or the outer disk radial recesses, wherein the radial recesses on the outer circumference of the inner disk and / or the outer disk are formed. The radial recesses of the inner plate and / or the outer plate are provided to redirect the air in the axial direction and to guide the air according to the invention in the direction of the first openings of the outer plate carrier.

According to the invention, the radial recesses form part of a drainage path for the cooling medium, and according to the present invention, the cooling medium heated at the friction surfaces can flow through the first openings of the outer disk carrier in the direction of the housing for cooling the cooling medium.

The cooled cooling medium is then preferably returned to the friction lining of the inner disk and / or outer disk via the second and third openings.

It is advantageous that no additional components for active ventilation of the dry clutch assembly are needed.

The space and the structure of the dry clutch assembly according to the invention thus partially corresponds to a wet clutch, whereby the requirements for a wet clutch can be met and such example can be substituted.

An advantage of the dry clutch according to the invention lies in minimal drag losses in the opened state of the clutch.

Preferably, the dry clutch arrangement is designed as a multi-plate clutch.

The outer disk carrier is substantially cup-shaped and therefore comprises a round disk-shaped bottom and a cylinder jacket-shaped cylinder portion. According to one embodiment of the invention, the first openings of the outer disk carrier extend on the cylinder jacket-shaped cylinder portion of the outer disk carrier substantially in the axial direction, thus forming elongated holes in the axial direction.

The cylinder section preferably has radially on its inner side alternately grooves and webs. The first openings are preferably formed in the grooves and allow a radial flow of air through the outer disk carrier.

In a preferred embodiment, the first openings are formed in each second groove of the outer disk carrier.

The outer disk connected to the outer disk carrier preferably engages with a radially formed profile in the grooves of the outer disk carrier. The profile of the outer disk is preferably formed so that the outer disk engages in every second groove of the outer disk carrier, particularly preferably in such grooves which have no first opening.

According to one embodiment of the invention, the second openings of the outer disk carrier are arranged distributed regularly. The second openings are provided in the bottom of the outer disk carrier and allow an axial flow through the air in the direction of the cup-shaped outer disk carrier disposed inner and outer disks.

The second openings are preferably formed in the region of the cylinder jacket-shaped cylindrical portion of the outer disk carrier.

The number of third openings of the inner disk and / or outer disk may correspond in a preferred embodiment, the number of second openings of the outer disk carrier. Alternatively, the number of second openings may differ from the number of third openings.

The second and third openings may have substantially the same geometry. The third openings of the inner disks and / or outer disks also serve for an axial flow through the air.

In a preferred embodiment, the outer disk substantially has a circular ring shape with a circular ring width, which releases the third openings of the inner disk. The inner circle of the circular ring has a radius which is large enough so that the projections of the third openings of the inner plate are within its diameter. In this embodiment, the outer plate has no third openings.

In a further preferred embodiment, the second openings of the outer disk carrier are aligned with the third openings of the outer disk. In this embodiment, the outer lamella has third openings, wherein the number and geometry of the third openings preferably correspond to those of the third openings of the inner lamella.

The third openings of the inner disk can be aligned with the same number and geometry in a corresponding static arrangement with the second and / or third openings of the outer disk carrier or the outer disk, but are due to the differential speed between outer disk carrier and inner disk in operation in a non-specific position relative to the second and third openings of the outer disk carrier and the outer disk.

However, the path for the cooling medium is nevertheless given, in particular in that the friction lining of the inner disk and / or the outer disk forms a gap through which the cooling medium can flow axially and / or radially in the direction of the third openings. In addition, the cooling medium can advantageously be guided radially in the direction of the friction surface of the friction lining by such a gap.

In a preferred embodiment, the number of radial recesses corresponds to the number of third openings of the inner plate and / or the outer plate.

The radial recesses of the inner plate and / or the outer plate are offset from the third openings of the inner plate and / or the outer plate such that a radial recess is formed in each case substantially centrally between two adjacent third openings of the inner plate and the outer plate.

The inner plate and / or the outer plate have in a further preferred embodiment, a friction lining, wherein the friction lining is disposed substantially on the outer circumference of the inner plate and / or the outer plate and is interrupted by the radial recesses of the inner plate and / or the outer plate.

The friction lining may in a preferred embodiment have a friction surface which is not closed 360 °, but is interrupted by the radial recesses. This has the disadvantage that the friction surface is reduced, but the advantage that more air and thus more cooling reaches the friction lining.

Brief description of the drawings

The invention will now be described by way of example with reference to the drawings.

1 is a sectional view of a dry clutch assembly according to the invention.

2 shows a perspective view of an inner plate of a dry clutch assembly according to the invention.

3 shows a side view of an outer fin of a dry clutch assembly according to the invention.

4 shows a perspective view of an outer disk carrier of a dry clutch assembly according to the invention.

Detailed description of the invention

1 shows a dry clutch assembly according to the invention 1 in a sectional view, wherein the dry clutch assembly 1 in a closed housing 2 is arranged. The dry clutch arrangement 1 includes an outer disc carrier 3 , as well as at least one Reiblamellenpaar, which is an inner plate 4 and an outer lamella 5 having. The outer lamella 5 is with the outer disk carrier 3 connected, the inner lamella 4 with an inner disc carrier. The outer disc carrier 3 has several first openings 03.01 and a plurality of second openings 3.2 on. The inner lamella 4 and / or the outer lamella 5 each have third openings 4.1 on. The outer disc carrier 3 the inner lamella 4 and the outer lamella 5 act together in such a way that the first openings 03.01 , the second openings 3.2 and the third openings 4.1 also a path for the cooling medium, as indicated by the arrows in 1 shown, train.

2 shows a perspective view of an inner plate 4 , The inner lamella 4 has five evenly spaced third openings 4.1 through which air can flow axially. The inner lamella 4 has further radial recesses 4.2 on which on the outer circumference of the inner plate 4 are formed. The radial recesses 4.2 are designed so that they are substantially centrally offset to two adjacent third openings 4.1 are arranged. In 2 five third openings are shown, that is, that they are arranged offset at an angle of 72 ° to each other. The radial recesses 4.2 therefore have a central offset of 36 ° to the adjacent third openings 4.1 on. The geometry of the third openings 4.1 is designed so that an optimal air flow is made possible. Through the radial recesses 4.2 is the on the outer circumference of the inner plate 4 circumferential friction lining 6 interrupted. The friction surface of the friction lining 6 This reduces the cooling of the friction surface. The serration of the inner disk 4 serves to connect the inner plate 4 with an inner disc carrier.

The outer lamella 5 is basically the same structure as the inner plate 4 However, instead of a serration has a profile on the outer circumference of the outer plate 5 which extends radially outward and is formed so that an engagement with the groove 3.5 of the outer disk carrier 3 is feasible.

3 shows a side view of the outer fin 5 , The circular outer lamella 5 has substantially a circular ring width A, which the third openings of the inner plate 4 releases. The friction lining 6 the inner lamella 4 has substantially the same annulus width as the annulus width A of the outer fin 5 and is this opposite arranged. On the outer circumference of the outer disk 5 is a radially outwardly extending profile for engaging in outer disc carrier 3 educated.

In this embodiment, only the inner plate 4 a friction lining 6 and the radial recesses 4.2 on.

4 shows a perspective view of an outer disk carrier 3 , wherein the outer disk carrier 3 cup-shaped. In the ground 3.3 of the outer disk carrier 3 are five second openings 3.2 formed, which allow an axial air inlet, wherein the second openings 3.2 essentially the same geometry as the third opening 4.1 the inner lamella 4 and / or the outer fin (not shown). In the cylinder jacket-shaped cylinder section 3.4 are several first openings 03.01 provided, which extend substantially in the axial direction and allow a radial air outlet. The cylinder jacket-shaped cylinder section 3.4 has grooves on the inside 3.5 and footbridges 3.6 which are alternately arranged and extend in the axial direction. The first openings 03.01 are in every second groove 3.5 educated. The outer lamella 5 engages over the outer circumference of the outer disk 5 trained profile in each groove 3.5 of the outer disk carrier 3 one, namely those grooves 3.5 which have no first openings 03.01 exhibit. The third openings 4.1 the outer lamella 5 aligned with the second openings 3.2 of the outer disk carrier 3 ,

LIST OF REFERENCE NUMBERS

1

Dry clutch arrangement

2

casing

3

External disk carrier

3.1

first opening

3.2

second opening

3.3

ground

3.4

cylinder jacket-shaped cylinder section

3.5

groove

3.6

web

4

inner plate

4.1

third opening

4.2

radial recess

5

outer plate

6

friction lining

A

Annulus width

Claims (8)

Dry coupling arrangement ( 1 ), wherein the dry clutch arrangement ( 1 ) in a closed housing ( 2 ), comprising at least one Reiblamellenpaar, wherein the Reiblamellenpaar an inner plate ( 4 ) and an outer plate ( 5 ), wherein the inner plate ( 4 ) with an inner disk carrier and the outer disk ( 5 ) with an outer disc carrier ( 3 ), wherein the outer disc carrier ( 3 ) is substantially cup-shaped and the inner plate ( 4 ) and the outer plate ( 5 ) within the outer disk carrier ( 3 ) are arranged, wherein the outer disk carrier ( 3 ) on a cylinder jacket-shaped cylinder section ( 3.4 ) a plurality of first openings ( 03.01 ) and on a floor ( 3.3 ) a plurality of second openings ( 3.2 ), wherein the inner plate ( 4 ) and / or the outer plate ( 5 ) each have a plurality of third openings ( 4.1 ) and formed on its outer circumference radial recesses ( 4.2 ), wherein the outer disk carrier ( 3 ), the inner plate ( 4 ) and the outer plate ( 5 ) cooperate in such a way that via the second openings ( 3.2 ) and the third openings ( 4.1 ) an inlet path for the cooling medium is formed and the radial recesses ( 4.2 ) form part of a drain path for the cooling medium, wherein the housing ( 2 ) at the outer disc carrier ( 3 ) facing side has a ribbing and the radial recesses ( 4.2 ) the cooling medium in the direction of the first openings ( 03.01 ) of the outer disk carrier ( 3 ), wherein the cooling medium through the first openings ( 03.01 ) towards the housing ( 2 ) can flow. Dry coupling arrangement ( 1 ) according to claim 1, characterized in that the first openings ( 03.01 ) of the outer disk carrier ( 3 ) on the cylinder jacket-shaped cylinder portion ( 3.4 ) of the outer disk carrier ( 3 ) extend substantially in the axial direction. Dry coupling arrangement ( 1 ) according to at least one of the preceding claims, characterized in that the second openings ( 3.2 ) of the outer disk carrier ( 3 ) are distributed regularly. Dry coupling arrangement ( 1 ) according to claim 1 to 3, characterized in that the outer plate ( 5 ) is substantially circular in shape and has a circular ring width (A), which the third openings ( 4.1 ) of the inner plate ( 4 ) releases. Dry coupling arrangement ( 1 ) according to claim 1 to 3, characterized in that the second openings ( 3.2 ) of the outer disk carrier ( 3 ) with the third openings ( 4.1 ) of the outer plate ( 5 ) are aligned. Dry coupling arrangement ( 1 ) according to at least one of the preceding claims, characterized in that the number of radial recesses ( 4.2 ) the number of third openings ( 4.1 ) of the inner plate ( 4 ) and / or the outer plate ( 5 ) corresponds. Dry coupling arrangement ( 1 ) according to one of the preceding claims, characterized in that the radial recesses ( 4.2 ) of the inner plate ( 4 ) and / or the outer plate ( 5 ) offset to the third openings ( 4.1 ) of the inner plate ( 4 ) and / or the outer disk are arranged such that a radial recess ( 4.2 ) each substantially centrally between each two adjacent third openings ( 4.1 ) of the inner plate ( 4 ) and / or the outer plate ( 5 ) is trained. Dry coupling arrangement ( 1 ) according to one of the preceding claims, characterized in that the inner plate ( 4 ) and / or the outer plate ( 5 ) each have a friction lining ( 6 ), wherein the friction lining ( 6 ) substantially on the outer circumference of the inner plate ( 4 ) and / or the outer plate ( 5 ) is arranged and through the radial recesses of the inner plate ( 4 ) and / or the outer plate ( 5 ) is interrupted.

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