DE202018002101U1 - friction plate - Google Patents

Abstract

Friction disc having a planar carrier ring (5) which has a first surface (6) and a second surface (7), wherein on the first surface (6) an annular friction lining (8) is arranged, characterized in that in the first friction lining (8 ) in the axial direction (4) at least one opening (13) is formed which extends in the axial direction (4) through the support ring (5), wherein the opening (13) spaced from an inner periphery (15) and spaced from an outer periphery (14) of the carrier ring (5) is formed.

Description

The invention relates to a friction plate with a planar carrier ring having a first surface and a second surface, wherein on the first surface an annular friction lining is arranged.

Friction blades for Lamellenreibsysteme are known per se from the prior art. These can be designed with or without friction lining. Further, they may be formed as an outer or inner plate. The friction plates are located on plate carriers and are brought together by an actuating device, if necessary, in frictional engagement with each other.

With respect to the friction linings are often used ring-shaped Streusinterreibbeläge or composite friction linings. Composite friction linings can also be segmented.

It is also known to give the friction linings a surface structure in the form of a groove in order to improve the cooling of the friction linings by means of oil.

The present invention has for its object to provide friction plates available, which have a lower weight compared to known friction plates.

This object of the invention is achieved in the friction disc mentioned above in that in the first friction lining in the axial direction at least one opening is formed, which also extends through the support ring in the axial direction, wherein the opening spaced to an inner periphery and spaced to an outer periphery of the support ring is trained.

The arrangement of the at least one opening in the axial direction through the entire friction plate material is saved, whereby the friction plate has a lower weight. Surprisingly, it was found that compared with the full ring design known friction plates the friction plate according to the invention in terms of performance suffers no or only an insignificant deterioration. By reducing the amount of material used but not only the weight of the friction plate is reduced, but can be concomitantly reduced and the cost of producing the friction plate.

According to one embodiment of the friction plate can be provided that not only on one side of the support ring, a friction lining is arranged, but that on the second surface of the support ring, a second friction lining is arranged, and in this second friction lining in the axial direction at least one opening is formed, the extending in the axial direction through the support ring and the first friction lining, wherein the opening spaced from an inner periphery and spaced from an outer periphery of the support ring is formed. It can thus be realized for the above effects also for acting in two directions friction plates.

According to further embodiments, the first friction lining is / are preferably a spreading rubbing lining and / or the second friction lining is a spreading rubbing lining, since these have a lower compressibility. The at least one breakthrough can thus be made larger without loss of performance, which in turn is associated with lower material consumption.

According to another embodiment variant of the friction disk, the opening may have a circular or a drop-shaped or an oval or a polygonal or a slot-shaped cross-section - viewed in the axial direction. Due to the variability of the shape of the breakthrough, the friction behavior of the friction plate can be better adapted to friction plates in the form of solid rings, ie without the at least one breakthrough.

To further improve the above-mentioned effects can be provided according to a further embodiment of the friction plate, that a plurality of extending in the axial direction through the friction plate breakthroughs are formed. It has proven to be advantageous if, according to one embodiment of the friction plate, the number of openings is selected from a range of 2 to 50, in particular from a range of 2 to 22.

In order to better avoid damage to the friction plate in the region of the apertures, it can be provided according to a variant embodiment that the edges of the first and / or the second friction lining are beveled following the at least one aperture. In addition, the flow behavior of a cooling fluid through the openings can thus be improved.

• - es werden mehrere Durchbrüche mit unterschiedlicher Flächenausdehnung und/oder unterschiedlicher Form angeordnet,
• - die mehreren Durchbrüche sind auf unterschiedlicher radialer Höhe ausgebildet;
• - mehrere Durchbrüche sind in gleicher radialer Richtung ausgebildet.

A better adaptability of the tribological properties of the friction plate to that of full rings is possible when the friction plate is formed according to at least one of the following embodiments:

• - several apertures with different surface area and / or different shape are arranged,
• - The multiple openings are formed at different radial height;
• - Several openings are formed in the same radial direction.

For a better understanding of the invention, this will be explained in more detail with reference to the following figures.

• 1 einen Ausschnitt aus einem Lamellenpaket in Seitenansicht;
• 2 eine erste Ausführungsvariante einer Reiblamelle;
• 3 eine zweite erste Ausführungsvariante einer Reiblamelle;
• 4 verschiedene Ausführungsvarianten der Reiblamelle;
• 5 ein Detail einer Ausführungsvariante einer Reiblamelle in Seitenansicht geschnitten.

Each shows in a simplified, schematic representation:

• 1 a section of a disk pack in side view;
• 2 a first embodiment of a friction plate;
• 3 a second first embodiment of a friction plate;
• 4 various embodiments of the friction plate;
• 5 a detail of a variant of a friction blade cut in side view.

By way of introduction, it should be noted that in the differently described embodiments, the same parts are provided with the same reference numerals or the same component names, wherein the disclosures contained in the entire description can be mutatis mutandis to the same parts with the same reference numerals or component names. Also, the location information chosen in the description, such as top, bottom, side, etc. related to the immediately described and illustrated figure and these position information in a change in position mutatis mutandis to transfer to the new location.

In 1 is a section of a disc pack 1 shown. The slat package 1 has several inner plates 2 and several outer plates 3 on, which can also be referred to as Reiblamellen. The inner disks 2 are in an axial direction 4 alternating with the outer plates 3 arranged. About a corresponding actuating mechanism are the inner plates 2 relative to the outer disks 3 in the axial direction 4 adjustable, so that between the inner plates 2 and the outer plates 3 a frictional connection is formed.

The inner disks 2 have an at least approximately planar support ring 5 with a first surface 6 and one of these in the axial direction 4 opposite second surface 7 on. On the first and / or the second surface 6 . 7 is a friction lining 8th arranged. The inner disks 2 So are so-called lining slats.

The outer disks 3 also have an at least approximately annular lamellar body 9 on, in the illustrated embodiment, however, free of friction linings 8th is. The outer disks 3 So are the so-called counter blades that are in frictional engagement with the friction linings 8th the inner plates 2 can be spent. But there is also the possibility that the friction linings 8th on the outer plates 3 are arranged, especially if on the inner plates 2 no friction linings 8th are arranged.

The carrier ring preferably exists 5 the inner plates 2 and / or the lamellar body 9 of the outer disk 3 from a steel or include this. However, they can also consist of another suitable, in particular metallic, material, for example of a sintered material.

This basic structure of a disk set 1 is known from the prior art. For further details, therefore, reference is made to this relevant prior art.

The slat package 1 is part of a slat friction system, such as a (wet-running) multi-plate clutch, a brake, a holding device, a differential lock, etc.

In 2 is a first embodiment of a friction plate shown, as in the plate pack 1 to 1 is or can be used. In particular, an inner lamella 2 shown. The friction plate can also be an outer plate 3 ( 1 ) be.

The friction plate is provided in particular for the so-called wet-running operation.

The friction plate may be on a radially inner end face 10 at least one driver element 11 , For example in the form of internal teeth, have.

It should be mentioned at this point that also the outer plates 3 At least one driver element may have on a radially outer end face. Should therefore the friction blade after 2 as outer lamella 3 be formed, the at least one driver element is arranged on the radially outer end face of the friction plate.

About the driver elements 11 can be a rotationally fixed connection with another component of the disk friction system, for example a shaft in the case of the inner disks 2 or the case of the Slat friction system in the case of the outer plates 3 , are prepared as known per se.

It is also possible that the inner fins 2 or the outer plates 3 So-called free-floating fins are formed, so no such driver elements 11 exhibit.

The carrier ring 5 ( 1 ) of the friction plate is in a circumferential direction 12 closed trained.

It should be noted at this point that in the event that the friction plate is an outer plate 3 ( 1 ), the following explanations to the carrier ring 5 also on the lamellar body 9 the outer lamella 3 can be transferred, if this is formed according to the invention.

Preferably, the carrier ring 5 integrally formed. But it is also possible that the carrier ring 5 is composed of several interconnected segments.

As already stated is on the first surface 6 of the carrier ring 5 ( 1 ) a first friction lining 8th arranged and connected to this. How out 2 can be seen, is the first friction lining 8th preferably on the entire first surface 6 of the carrier ring 5 arranged. Next extends the first friction lining 8th preferably in the circumferential direction 12 continuous, so preferably also ring-shaped. It is therefore preferred only a first friction lining 8th on the first surface 6 of the carrier ring 5 arranged.

In the preferred embodiment, the first friction lining 8th a spreading rubble coating. The grit sintering technology per se is known from the prior art, so reference is made here to further details of this technology. It should be noted at this point only so much that while preparing for a carrier ring 5 sprinkled a sintered powder suitable for the friction plate and on the support ring 5 is sintered. Thereafter, this surface are compressed and thereby grooves are pressed for cooling the Reibelamelle. Subsequently, the coating can be subjected to a second sintering. Optionally, a post-treatment, eg a calibration of the friction plate, a deburring, etc., takes place.

As sintering powder, the materials known from the prior art can be used for stray sintered linings.

According to one embodiment of the friction plate may alternatively or additionally to the first friction lining 8th on the second surface 7 of the carrier ring 5 ( 1 ) a second friction lining 8th ( 1 ) can be arranged. Also this second friction lining 8th is in accordance with a further embodiment of the friction blade preferably a stray sintered coating. The above remarks on the first friction lining 5 can therefore also on the second friction lining 8th be transmitted.

How out 2 it can be seen is in the friction lining 8th and the carrier ring 5 ( 1 ) of the friction blade at least one breakthrough 13 provided or formed, which is in the axial direction 4 ( 1 ) through the friction lining 8th and the carrier ring 5 extends. The breakthrough 13 through the friction lining 8th is in alignment with the breakthrough 13 of the carrier ring 5 educated. Next is the breakthrough 13 both from an outer circumference 14 as well as from an inner circumference 15 of the carrier ring 5 educated. The breakthrough 13 is thus fully closed (in the axial direction 4 considered), as is made 2 can be seen.

If also the second friction lining described above 8th is arranged on the support ring 5, is preferably also in this at least one breakthrough 13 arranged or formed. The comments on the breakthrough 13 in the first friction lining 8th apply analogously for this breakthrough 13 in the second friction lining 8th , This breakthrough 13 is in alignment with the breakthrough 13 in the first friction lining and in the carrier ring 5 educated.

Although in the embodiment of the friction plate described above, only one breakthrough 13 in the first friction lining 8th and in the carrier ring 5 and / or just a breakthrough 13 in the second friction lining 8th and in the carrier ring 5 is formed, according to a further embodiment of the friction plate is preferred that multiple openings 13 in the first friction lining 8th and in the carrier ring 5 and / or multiple breakthroughs 13 in the second friction lining 8th and in the carrier ring 5 are formed. There are thus several in the axial direction 4 through the friction blade extending breakthroughs 13 educated. In particular, the number of breakthroughs 13 may be selected from a range of 2 to 50, preferably a range of 2 to 22. In general, the number of apertures may be selected from a range of 1 x to 10 times x, where x is defined as the ratio of the diameter of the carrier ring 5 on the outer circumference 14 / maximum width of the carrier ring 4 in the radial direction 16 ( 4 ).

At the in 2 illustrated embodiment of the friction plate have the openings 13 a circular cross section (in the axial direction 4 considered). The breakthrough 13 or the breakthroughs 13 can also have a different cross-sectional shape (in the axial direction 4 considered), as is apparent from the 3 and 4 it can be seen that show further variants of the friction plate. For example, the breakthrough 13 or can the breakthroughs 13 an egg-shaped or teardrop-shaped ( 3 ) or an oval or a polygonal, eg a triangular, a square, a hexagonal, or a slot-shaped cross-section - in the axial direction 4 considered - have. The schlitzfömige breakthrough 13 can be wavy or rectilinear, like this 4 is apparent.

The several breakthroughs 13 can in terms of their size, ie their surface area, and their shape of the cross section in the axial direction 4 considered all to be the same. However, there is also the possibility that multiple breakthroughs 13 are arranged with different surface area and / or different shape, as exemplified in the lower right quadrant of the friction plate in 4 is shown.

Next there is the possibility that the multiple breakthroughs 13 are formed at different radial height, as exemplified in the left lower quadrant of the friction plate in 4 is shown. Thereby, the several breakthroughs 13 be formed in the same radial direction, as in the transition from the lower left quadrant to the left upper quadrant of the friction plate in 4 is shown. It is possible in the latter embodiment of the friction plate that all breakthroughs 13 have the same size or a different size in the same radial direction.

For example, the breakthroughs 13 be formed from the inside out with a larger surface area.

In 5 is a further embodiment of the friction plate shown in fragmentary form, in which the edges 17 the first and / or the second friction lining 8th following the at least one breakthrough 13 are formed sloping.

The embodiments show possible embodiments of the friction plate, it being noted at this point that combinations of the individual embodiments are possible with each other.

For the sake of order, it should finally be pointed out that for a better understanding of the structure of the friction plate, it is not necessarily drawn to scale.

LIST OF REFERENCE NUMBERS

1

disk pack

2

inner disk

3

outer disk

4

axially

5

support ring

6

surface

7

surface

8th

friction lining

9

lamellar bodies

10

face

11

dogging

12

circumferentially

13

breakthrough

14

outer periphery

15

inner circumference

16

radial direction

17

edge

Claims (11)

Friction disc having a planar carrier ring (5) which has a first surface (6) and a second surface (7), wherein on the first surface (6) an annular friction lining (8) is arranged, characterized in that in the first friction lining (8 ) in the axial direction (4) at least one opening (13) is formed which extends in the axial direction (4) through the support ring (5), wherein the opening (13) spaced from an inner periphery (15) and spaced from an outer periphery (14) of the carrier ring (5) is formed. Friction plate after Claim 1 , characterized in that on the second surface (7) of the support ring (5), a second friction lining (8) is arranged, and in this second friction lining (8) in the axial direction (4) at least one opening (13) is formed, the in the axial direction (4) also by the support ring (5) and the first friction lining (8), wherein the opening (13) spaced from the inner circumference (15) and spaced from the outer periphery (14) of the support ring (5) is formed. Friction plate after Claim 1 or 2 , characterized in that the first friction lining (8) is a litter friction lining. Friction plate after Claim 2 or 3 , characterized in that the second friction lining (8) is a litter friction lining. Friction plate after one of Claims 1 to 4 , characterized in that the opening (13) has a circular or a teardrop-shaped or an oval or a polygonal or a slot-shaped cross-section - viewed in the axial direction (4) - has. Friction plate after one of Claims 1 to 5 , characterized in that a plurality of in the axial direction (4) through the friction plate extending openings (13) are formed. Friction plate after Claim 6 , characterized in that the number of openings (13) is selected from a range of 2 to 50, in particular from a range of 2 to 22. Friction plate after one of Claims 1 to 7 , characterized in that edges (17) of the first and / or the second friction lining (8) following the at least one opening (13) are chamfered. Friction plate after one of Claims 6 to 8th , characterized in that a plurality of openings (13) are arranged with different surface area and / or different shape. Friction plate after one of Claims 6 to 9 , characterized in that the plurality of openings (13) are formed at different radial height. Friction plate after one of Claims 6 to 10 , characterized in that a plurality of openings (13) are formed in the same radial direction.

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