WO2019204844A1

WO2019204844A1 - Friction plate

Info

Publication number: WO2019204844A1
Application number: PCT/AT2019/060133
Authority: WO
Inventors: Volker Föge; Falk Nickel; David PÜHRINGER; Gerald Schachinger
Original assignee: Miba Frictec Gmbh
Priority date: 2018-04-25
Filing date: 2019-04-18
Publication date: 2019-10-31
Also published as: CN112088255A; DE202018002101U1; DE112019002109A5

Abstract

The invention relates to a friction plate comprising a flat carrier ring (5) having a first surface (6) and a second surface (7), wherein an annular friction lining (8) is arranged on the first surface (6), and at least one opening (13) is formed in the first friction lining (8) in the axial direction (4), which also extends through the carrier ring (5) in the axial direction (4), wherein the opening (13) is formed at a distance from an inner circumference (15) and at a distance from an outer circumference (14) of the carrier ring (5).

Description

friction plate

The invention relates to a friction plate with a planar support ring surface having a first Oberflä 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 In nenlamelle. The friction plates are on Lamellenträägem and are brought together by an actuating device, if necessary, in frictional engagement.

With regard to the friction linings, annular straining sintered friction linings or composite friction linings are frequently used. Composite friction linings can also be segmented.

It is also known, the friction linings a surface structure in Lorm a groove to ge ben, so as to improve the cooling of the friction linings by means of oil.

The present invention has for its object to provide friction plates available to Stel, 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 ge entire friction plate material is saved, whereby the friction plate has a lower Ge weight. Surprisingly, it was found that compared with the full ring design known friction plates the friction blade according to the invention in terms of performance mance no or only a negligible deterioration suffers. Due to the quantitative reduction in the material used but not only the weight of the friction plate is reduced, On the other hand, the costs for the production of the friction plate can be reduced as well.

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 in two directions we kende friction blades.

Preferably, the first friction lining is / are according to further embodiments

Streusinterreibbelag and / or the second friction lining a Streusinterreibbelag, as these have a ge ringere compressibility. The at least one breakthrough can thus be made larger without Perfor manceverlust, which in turn is associated with lower material consumption.

According to another embodiment of the friction plate, the breakthrough may have a circular or a teardrop-shaped or an oval or a polygonal or a slot-shaped cross section - in the axial direction - have. 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 been found to be advantageous if according to a variant of the friction plate to the number of breakthroughs is selected from a range of 2 to 50, in particular from a range of 2 to 22.

To better avoid damage to the friction plate in the region of the openings can be provided according to a variant that the edges of the first and / or of the second friction lining are formed beveled following the at least one breakthrough. In addition, so that the flow behavior of a cooling fluid can be improved through the breaks.

A better adaptability of the tribological properties of the friction plate to that of full rings is possible if the friction plate is formed according to at least one of the following Ausfüh insurance variants:

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.

Each shows in a simplified, schematic representation:

1 shows a detail of a disk pack in side view;

2 shows a first embodiment of a friction plate;

3 shows a second first embodiment variant of a friction disk;

4 shows different embodiments of the friction plate;

Fig. 5 shows 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 designations, the disclosures contained in the entire description being transmitted analogously to the same parts with the same reference numerals and the same component designations. - t - who can. Also, the position information selected in the description, such as above, un th, laterally, 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 Fig. 1, a section of a disk pack 1 is shown. The disk pack 1 has a plurality of inner disks 2 and a plurality of outer disks 3, which can also be characterized as friction plates be. The inner disks 2 are arranged alternately with the outer disks 3 in an axial direction 4. Via a corresponding actuating mechanism, the inner disks 2 are adjustable relative to the outer disks 3 in the axial direction 4, so that a frictional engagement is formed between the inner disks 2 and the outer disks 3.

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

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

Preferably, the carrier ring 5 of the inner disk 2 and / or the disk body 9 of the outer disk 3 consists of 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 disk set 1 is part of a disk friction system, for example, a (wet-running) multi-plate clutch, a brake, a holding device, a differential lock, etc. In Fig. 2, a first embodiment of a friction plate is shown as it is used in the La mellenpaket 1 of FIG. 1 or can be. In particular, a Innenlam elle 2 is shown. However, the friction plate may also be an outer plate 3 (FIG. 1).

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

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

It should be mentioned at this point that the outer plates 3 on a radially outer end surface may have at least one driver element. If, therefore, the friction disk according to FIG. 2 is designed as an outer disk 3, the at least one driver element is arranged on the radially outer end face of the friction disk.

About the driver elements 11, a rotationally fixed connection with another component of the Lamella friction system, such as a shaft in the case of the inner disk 2 or the housing of the disk friction system in the case of the outer lamella 3, are produced, as is well known.

It is also possible that the inner disks 2 or the outer disks 3 are thus formed so-called free-flying blades, so have no such driver elements 11. The support ring 5 (Fig. 1) of the friction plate is closed out in a circumferential direction 12 forms.

It should be noted at this point that, in the event that the friction blade is a Au ßenlamelle 3 (Fig. 1), the following explanations to the support ring 5 on the La mellenkörper 9 of the outer fin 3 can be transmitted, provided that after the Inven tion is formed.

Preferably, the carrier ring 5 is integrally formed. But it is also possible that the support ring 5 is composed of a plurality of interconnected segments. As already stated, a first friction lining 8 is arranged on the first surface 6 of the carrier ring 5 (FIG. 1) and connected thereto. As can be seen from Fig. 2, the first friction lining 8 is preferably net angeord on the entire first surface 6 of the support ring 5. Furthermore, the first friction lining 8 preferably extends continuously in the circumferential direction 12, that is to say preferably also in the form of a ring. It is therefore preferred that only a first friction lining 8 is arranged on the first surface 6 of the carrier ring 5.

In the preferred embodiment variant, the first friction lining 8 is a spreading friction lining. 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 it is scattered on a support carrier ring 5 a ge for the friction blade suitable sintered powder and sintered onto the support ring 5. Thereafter, this covering are compacted and thereby grooves for cooling the Reibelamelle pressed pressed. Subsequently, the coating can be subjected to a second sintering. If appropriate, an aftertreatment, e.g. a calibration of the friction plate, a deburring, etc., instead.

As sintering powder, the materials known from the prior art can be used for Streusin terbeläge.

According to one embodiment variant of the friction plate, alternatively or additionally to the first friction lining 8, a second friction lining 8 (FIG. 1) can be arranged on the second surface 7 of the carrier ring 5 (FIG. Also, this second friction lining 8 is in accordance with a further Ausfüh tion variant of the friction plate preferably a stray sintered coating. The foregoing Ausfüh ments for the first friction lining 5 can therefore be transferred to the second friction lining 8.

As can be seen from Fig. 2, in the friction lining 8 and the support ring 5 (Fig. 1) of the friction plate at least one opening 13 is provided or formed, in the axial direction 4 (Fig. 1) continuously through the friction lining and the carrier ring 5 extends. The opening 13 through the friction lining 8 is formed in alignment with the opening 13 of the support ring 5. Further, the opening 13 is from both an outer periphery 14 and from an inner circumference 15 of the support ring 5 is formed. The breakthrough 13 is thus vollum initially closed (viewed in the axial direction 4) formed, as can be seen from Figure 2 to it.

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

Although only one opening 13 in the first friction lining 8 and in the support ring 5 and / or only one opening 13 in the second friction lining 8 and the support ring 5 is formed in the embodiment of the friction plate described above, according to a further embodiment of the friction plate is preferred that multiple openings 13 in the first friction lining 8 and in Trä gerring 5 and / or a plurality of openings 13 in the second friction lining 8 and the support ring 5 are formed from. Thus, a plurality of apertures 13 extending through the friction plate in the axial direction 4 are formed. In particular, the number of apertures 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 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 (Fig. 4).

In the embodiment of the friction plate shown in Fig. 2, the apertures 13 have a circular cross section (viewed in the axial direction 4). The opening 13 or the openings 13 may also have a different cross-sectional shape (viewed in the axial direction 4), as can be seen from FIGS. 3 and 4, which show further variant embodiments of the friction plate. For example, the opening 13 or the openings 13 may have an egg-shaped or teardrop-shaped (FIG. 3) or an oval or a polygonal, for example a triangular, a quadrangular, a hexagonal, or a slot-shaped cross section - viewed in the axial direction 4 - have , The schlitzfömige breakthrough 13 may be corrugated or rectilinear, as shown in FIG. 4 can be seen. The plurality of openings 13 may be all the same in terms of their size, ie their surface area, and their shape of the cross section in the axial direction 4 considered. However, there is also the possibility that a plurality of openings 13 are arranged with different surface area and / or different shape, as shown by way of example in the right lower quadrant of the friction plate in Fig. 4.

Further, there is the possibility that the plurality of openings 13 are formed on different radi aler height, as exemplified in the lower left quadrant of Reibla melle in Fig. 4 is shown. In this case, the plurality of apertures 13 may also be formed in the same radial direction, as shown in the transition from the lower left quadrant to the left upper quadrant of the friction plate in Fig. 4. It is possible in the latter embodiment of the friction plate, that all openings 13 of the same radial direction have the same size or a different size. For example, can the openings 13 are formed from the inside to the outside with a larger Flächenausdeh voltage.

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

The embodiments show possible Au sführungs variants of the friction plate, it being noted at this point that combinations of the individual variants are also possible one after the 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. Reference signs Lamella package

inner disk

outer disk

axially

support ring

surface

friction lining

lamellar bodies

face

dogging

Scope direction

breakthrough

outer periphery

inner circumference

radial direction

edge

Claims

Patent claims

1. friction plate with a planar support ring (5) having 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 (L3) is formed, which extends in the axial direction (4) through the support ring (5), wherein the opening (13) spaced from a nenumfang in (15) and spaced to an outer periphery (14) of the support ring (5) is ausgebil det.

2. Reiblamelle according to 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, which in the axial direction (4) by the support ring (5) and the first friction lining (8) he stretches, wherein the opening (13) spaced from the inner circumference (15) and spaced from the outer periphery (14) of the support ring (5) is formed.

3. friction plate according to claim 1 or 2, characterized in that the first friction lining (8) is a litter friction lining.

4. friction plate according to claim 2 or 3, characterized in that the second friction lining (8) is a litter friction lining.

5. Reiblamelle according to one of claims 1 to 4, characterized in that the opening (13) has a circular or a teardrop-shaped or an oval or egg nen polygonal or a slot-shaped cross-section - in the axial direction (4) - has.

6. friction plate according to 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.

7. friction plate according to claim 6, characterized in that the number of openings (13) is selected from a range of 2 to 50, in particular from a loading range of 2 to 22nd

8. friction plate according to 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.

9. friction plate according to one of claims 6 to 8, characterized in that a plurality of openings (13) are arranged with different surface area and / or unterschiedli cher shape.

10. Friction blade according to one of claims 6 to 9, characterized in that the plurality of apertures (13) are formed at different radial height.

11. Friction blade according to one of claims 6 to 10, characterized in that a plurality of openings (13) are formed in the same radial direction.