DE102018208814A1 - Disc pack for a Reibschaltelement, Reibschaltelement and methods for testing the arrangement of a disk set for a Reibschaltelement - Google Patents

Abstract

The invention relates to a disk set (2) for a friction switching element (1), in particular a multi-disc brake or a multi-disc clutch, with annularly designed first fins (3) and second fins (4) to be arranged alternately one behind the other in the axial direction, wherein the first fins (3) can be brought into frictional contact with at least one end face (12) each having an end face (17) of the second lamellae (4) in an overlapping area, the first lamellae (3) each having a first wall thickness in the area of the end faces (12). 15) and at a radial base portion (13) have a second wall thickness (16), wherein the first wall thickness (15) is less than the second wall thickness (16), and the second fins (4) each have a substantially uniform wall thickness in the area their end faces (17) and an adjoining radial base portion have.

Description

The invention relates to a disk set for a Reibschaltelement, in particular a multi-disc brake or a multi-plate clutch, with annular first fins and second fins, which are to be arranged alternately in the axial direction one behind the other, wherein at least the first fins having at least one end face with an end face of the second fins in an overlap region can be brought into frictional contact. Furthermore, the present invention relates to a Reibschaltelement and a method for testing the arrangement of a disk set for a Reibschaltelement.

Friction shifting elements designed as multi-disc brakes or multi-disc clutches are known from vehicle technology, which comprise a disc pack consisting of ring-shaped first discs and second discs. The first and second lamellae are alternately arranged in succession in the axial direction, wherein at least the first lamellae with at least one end face can be brought into frictional contact with an end face of the second lamellae in an overlapping region. As a result, depending on the number of friction surfaces, a torque can be transmitted. The arrangement of such a disk set for a Reibschaltelement comprises the axially in the axial direction successively arranged first fins and second fins, which are arranged between a stationary support member and an axially displaceable actuating element. An adjustable axial distance between the support member and the actuating element is in the unactuated state of the Reibschaltelements greater than the total thickness of the disk set. The adjustable axial distance is called a clearance.

A disk set for a friction element designed as a multi-disk brake or clutch and an arrangement of the type mentioned at the outset are known from the DE 10 2011 004 585 A1 known. Disclosed therein are disk sets of annular first and second disks, which are arranged alternately one behind the other in the axial direction. In each case, a first lamella and a second lamella form a pair of lamellae with at least one friction surface, wherein an end face of the first lamella can be brought into frictional contact with an end face of the second lamellae in an overlapping region.

The alternating arrangement of the first and second blades requires great care during an assembly process to produce the required number of effective friction surfaces between them, depending on the number of pairs of blades. An arrangement of individual lamellae deviating from the alternating arrangement during assembly may result in the number of actually effective friction surfaces being less than that which must result from the number of lamellae pairs provided. Thus, an assembly of two first slats and two second slats in succession leads to the number of effective friction surfaces being reduced by two. Accordingly, only part of the expected braking torque is available.

Such a mounting error can also occur in the case of maintenance or repair, since it can remain undetected in a pure functional test in which a maximum braking torque that can be generated is often not measured.

Starting from the above-described prior art, it is now the object of the present invention to provide a disk set, a Reibschaltelement and a method for checking the arrangement of a disk set for a Reibschaltelement, by which a faulty assembly sequence can be avoided or determined in a simple manner.

This object is achieved by a disk set starting from the preamble of claim 1 in conjunction with its characterizing features and by a Reibschaltelement starting from the preamble of the independent claim 8 in conjunction with its characterizing features. The respective subsequent dependent claims give each advantageous embodiments of the invention. A method for checking the arrangement of a disk set for a Reibschaltelement, in which a disk pack according to the invention is used, is the subject of claim 11.

According to the invention, a disk set for a Reibschaltelement, in particular a multi-disc brake or a multi-plate clutch, with annularly designed first fins and second fins, which are to be arranged alternately one behind the other in the axial direction, is provided. For this purpose, a first lamella and a second lamella are alternately arranged in succession. The first slats are arranged relative to the second slats relatively movable. To transmit a torque, at least the first lamellae can be brought into frictional contact with at least one end face, each with an end face of the second lamellae in an overlapping area. The respective end surfaces of the first fins and second fins extend between inner and outer circumferences of the annular fins.

The invention now includes the technical teaching that the first lamellae in each case in the region of the end faces a first wall thickness and at an adjoining radial base portion have a second wall thickness, wherein the first wall thickness is less than the second wall thickness, and the second fins each having a substantially uniform wall thickness in the region of the end faces and an adjoining base portion. According to the invention, the assembly of the slats is prevented in a wrong order by the design of the slats. The faulty arrangement of two first lamellae one behind the other leads, according to the embodiment according to the invention, to two base regions of the first lamellae lying next to one another, whereby an axial distance between the first lamellae is established, by which a contact of the end surfaces of the first lamellae is prevented.

Preferably, the respective base portion of both the first and the second blades have a radially oriented toothing. The respective base portion can connect directly to the end faces. The base portion may be provided on the inner periphery or on the outer periphery of the fins.

In particular, the first fins may be formed as outer fins or inner fins. More preferably, the first slats can be designed as rotating slats or vertical slats.

According to a development, the base region of the first lamellae may have received a larger second wall thickness than the first wall thickness between the end surfaces by a forming process. For example, the base element may be upset in the region of the intended toothing in order to produce the second wall thickness.

Alternatively, the different wall thicknesses in the base area and between the end faces of the first fins may be produced by a machining operation. This can be provided in particular in the existing of a steel first fins.

According to a preferred refinement, in order to form the different wall thicknesses in the base region and between the end faces of the first lamellae, a two-sided arrangement of additional components in the base region can be provided. This is advantageous, since the first lamella can be embodied, for example, as a stamped part, to which the additional components are arranged in the base region, the strength of which can be fixed flexibly. The additional components may consist of a different material than the first blade. The arrangement of the additional components can be cohesively, for example by gluing or welding, or positively and / or non-positively, for example by means of penetrating connecting elements done.

According to a preferred embodiment, the first lamellae can be embodied integrally, that is to say that a base body and the end surface of the first lamella forming the friction surface are made of a material. According to a preferred embodiment, the first lamellae may be designed in several parts, wherein at least one end face is provided with at least one friction lining element, wherein the common first wall thickness is less than the second wall thickness of the base portion. Alternatively, the at least one friction lining element can be arranged directly on the base area. In this case, the friction lining of the first blade can be designed to vary in strength, so that in the region of the end faces on which the friction lining is arranged, the first wall thickness results and outside the friction surfaces, the second wall surface.

The object initially posed is further achieved by a friction switching element, in particular multi-disc brake or multi-plate clutch. The friction switching element comprises a disk set with alternating in the axial direction to be arranged one behind the other first fins and second fins, which are arranged between a stationary support member and an axially displaceable actuating element. In this case, an adjustable axial distance between the support member and the actuating element in the unactuated state of the Reibschaltelements is greater than the total thickness of the disk set. A faulty arrangement of the lamellae can be avoided in that the first lamellae each have a first wall thickness in the area of an end face and a second wall thickness on a radial base portion, wherein the first wall thickness is less than the second wall thickness, while the second lamellae each have one in the Have substantially uniform wall thickness between their end faces and in the region of an adjoining radial base portion.

Preferably, the difference between the first and second wall thickness can be selected such that they are greater than the sum of wall thickness tolerances of all the slats of the disk set.

In particular, the difference between the first wall thickness and the second wall thickness can be selected such that an axial extension of the disk set sets in an array of two first fins, so that no mounting of the disk set between the stationary support member and the axially displaceable actuator is given , In this way, a mounting error is particularly easy to detect.

Furthermore, a method for checking the arrangement of a disk set for a Reibschaltelement, in particular a multi-disc brake or multi-plate clutch is proposed, wherein in the axial direction alternately one behind the other fins and second fins between a stationary support member and an axially displaceable actuating element of the Reibschaltelementes are to be arranged, wherein an axial Distance between the support member and the actuating element is set in the unactuated state of the Reibschaltelements, which is greater than the total thickness of the plate pack. Characterized in that the first fins each have a first wall thickness between their end faces and a second wall thickness at a radial base portion, wherein the first wall thickness is less than the second wall thickness, and the second fins each have a substantially uniform wall thickness between their end faces and in the area have a subsequent radial base portion, and wherein the difference between the first and second wall thickness is selected such that it is greater than the sum of wall thickness tolerances of all slats, is to check compliance with the correct order of arrangement of the first slats and second slats measured the axial extent of the disk set and compared with the axial distance between the support member and the actuating element in the unactuated state of the Reibschaltelements.

The invention is not limited to the specified combination of the features of the independent or the dependent claims. It also results in ways to combine individual features, even if they emerge from the claims, the following description of preferred embodiments of the invention or directly from the drawings. The reference of the claims to the drawings by use of reference numerals is not intended to limit the scope of the claims.

• 1 eine schematische Darstellung einer Teilansicht eines Reibschaltelementes im Längsschnitt;
• 2a eine Vorderansicht einer ersten Lamelle;
• 2b eine Schnittansicht der ersten Lamelle gemäß 2a entlang der Linie A-A;
• 2c eine perspektivische Ansicht der ersten Lamelle gemäß 2a;
• 3a eine Teilschnittansicht eines Lamellenpaketes in einer ersten Anordnung von ersten und zweiten Lamellen; und
• 3b eine Teilschnittansicht eines Lamellenpaketes in einer zweiten, abweichenden Anordnung von ersten und zweiten Lamellen gemäß 3a.

An advantageous embodiment of the invention, which will be explained below, is shown in the drawings. It shows:

• 1 a schematic representation of a partial view of a Reibschaltelementes in longitudinal section;
• 2a a front view of a first fin;
• 2 B a sectional view of the first blade according to 2a along the line AA ;
• 2c a perspective view of the first blade according to 2a ;
• 3a a partial sectional view of a disk pack in a first arrangement of first and second blades; and
• 3b a partial sectional view of a plate pack in a second, different arrangement of first and second blades according to 3a ,

In 1 is a schematic representation of a partial view of a Reibschaltelementes 1 shown in longitudinal section. The friction switching element 1 can be designed as a multi-disc brake or multi-plate clutch. In the presently illustrated embodiment, the friction switching element 1 designed as a multi-disc brake. The friction switching element 1 includes a disc pack 2 , The slat package 2 has first fins 3 and second fins 4 on, which are to be arranged alternately one behind the other. The following are the first slats 3 as inner fins and the second fins 4 referred to as outer plates.

The outer disks 4 are designed as standing slats and are supported on an outer plate carrier 5 , which is rotatably connected to a housing part, not shown, from. The outer disks 4 are play-related, but substantially non-rotatable with the outer disc carrier 5 connected. Between the standing outer plates 4 are each formed as a rotating blades inner plates 3 arranged. The rotating inner disks 3 are non-rotating, but with a game tainted, with an inner disk carrier 6 connected. For this purpose, the inner disk carrier 6 around a longitudinal axis 9 the Reibschaltelementes 1 rotate. The inner disks 3 and outer plates 4 are formed substantially annular. The alternately staggered arrangement of the inner plates 3 and outer plates 4 causes their facing faces 12 . 17 overlap in sections. The respective faces 12 . 17 extend between the inner and outer periphery of the annular inner lamellae 3 and outer plates 4 , The overlapping area of the faces 12 and 17 of inner plates 3 and outer plates 4 , which upon actuation of the Reibschaltelementes 1 is brought into frictional contact with each other to transmit a torque, is referred to as a friction surface.

The slat package 2 is supported on an axially fixed support member 7 , which can be designed as a pressure disk, in the axial direction. Here is the support part 7 on the outer disc carrier 5 fixed. On the opposite side of the disk pack 2 there is an axially displaceable actuator 8th which can also be designed as a pressure disk. The axially displaceable actuating element 8th is this with the inner disk carrier 6 non-rotatable, but axially displaceable, connected and supported by the standing outer plates 4 and the rotating inner disks 3 existing disc pack 2 also in the axial direction.

The rotating inner disks 3 rotate together with the inner disk carrier 6 around the longitudinal axis 9 , Is the running as a disc brake friction switch 1 not actuated, so is an axial distance 10 between the support part 7 and the actuator 8th greater than the total thickness 11 all standing outer plates 4 and all rotating inner disks 3 of the disk pack 2 together. Therefore, acts in the de-energized state of the Reibschaltelementes 1 between the standing slats 4 and the rotating blades 3 no axial force, so that no braking torque is caused. Is by an application of force an axially directed force on the actuator 8th applied, so the actuator moves 8th in the direction of the opposite support part 7 until the distance 10 between the support part 7 and the actuator 8th the total thickness 11 all standing outer plates 4 and all rotating inner disks 3 equivalent. The axially directed force now acts on the friction surfaces or end faces 12 . 17 the inner plates 3 and outer plates 4 , so that a braking torque is created.

In 2a is the first lamella 3 in a front view, in 2 B in a sectional view along the line AA as in 2c shown in a perspective view. The essentially annular inner plate 3 has end faces 12 on, which are formed as friction surfaces. On the inner circumference has the inner plate 3 a base section 13 on top, with a radially oriented gearing 14 is provided. The gearing 14 serves the rotationally fixed, but axially displaceable, arrangement of the inner plate 3 on the inner disk carrier 6 ,

As from the illustration in 2 B can be seen, the inner plate 3 between their faces 12 a first wall thickness 15 while the gearing 14 at the base section 13 a second wall thickness 16 which is larger than the first wall thickness 15 is. For this purpose, the gearing 14 of the base section 13 in the course of manufacturing the inner plate 3 upset, creating a larger second wall thickness 16 is reached. Different first wall thicknesses 15 and second wall thicknesses 16 the inner lamella 3 can also be achieved by machining.

That in the 2a to 2c illustrated embodiment shows the inner plate 3 as an integral lamella. That means that the inner lamella 3 on their faces 12 has no separate friction linings, but the base section 13 and the faces 12 the first lamella 3 consist of a uniform material. Likewise, the inner fin 3 in several parts with on their faces 12 be executed attached friction linings. Here, the resulting first wall thickness, which is the sum of the wall thicknesses of the inner plate 3 between their faces 12 and the material thickness of the friction linings arranged on both sides results smaller than the second wall thickness in the base region 13 executed. Additionally or alternatively, the base portion 13 be enlarged by the two-sided arrangement of additional components.

In 3a is a partial sectional view of only the disk pack 2 in a first arrangement of the inner disks 3 and outer plates 4 shown. Between four outer plates 4 are three inner disks 3 shown in correct alternating order arranged one behind the other.

The not shown in detail, substantially annular outer plates 4 have a constant wall thickness as shown in FIG 3a is apparent. The outer disks 4 have on their outer circumference on a pedestal portion of the rotationally fixed arrangement on the outer disc carrier 5 serves. faces 17 extending from the base portion of the respective outer fin 4 extend, forming the friction surfaces of the respective outer plate 4 , Preferably, the end faces 12 respectively friction surfaces of the inner disks 3 and the faces 17 respectively friction surfaces of the outer disks 4 have the same material thickness.

The second wall thickness 16 is sized so that between the faces 12 and 17 two adjacent inner plates 3 and an outer plate arranged between them 4 almost no distance sets. The illustrated disc pack 2 has at in 3a shown correct order of arrangement an axial extent 19 , which is the sum of the wall thicknesses of the outer plates 4 and the first wall thicknesses 15 the inner plates 3 results. During assembly of the friction switching element 1 can the axial extent 19 of the disk pack 2 be measured to a so-called clearance with a compensation part, here the support member designed as a thrust washer 7 , which is available in several strengths. The difference between the first wall thickness 15 and the second wall thickness 16 can be chosen so large that it is greater than the sum of the thickness tolerance of all inner and outer plates 3 and 4 together.

The representation in 3b shows a partial sectional view of the disk pack 2 in a second, different arrangement of inner plates 3 and outer plates 4 , According to this due to a faulty assembly arrangement of inner plates 3 and outer plates 4 of the disk pack 2 are, from left to right on the right, initially two outer plates 4 arranged side by side, to which two adjacently arranged inner fins 3 connect. This leads due to the different first and second wall thicknesses 15 . 16 the inner plates 3 to that the base sections 14 the inner plates 3 touch. Between the facing faces 12 the two inner disks 3 Therefore, the distance arises 18 a, so that an axial extent 20 of the differently mounted plate pack 2 which is larger than the axial extent 19 of the correctly assembled plate pack according to 3a is. Thus, by measuring the axial extent 19 . 20 and comparing with the axial distance 10 between the support part 7 and the actuator 8th be checked in the de-energized state of the Reibschaltelements1, whether the correct order of the alternating arrangement of the inner plates 3 and outer plates 4 was complied with. This makes it easy to ensure that the inner plates 3 and outer plates 4 of the disk pack 2 be mounted in the correct order and the expected braking behavior of running as a multi-disc brake Reibschaltelementes 1 is reached.

In addition, it is conceivable the difference between the first wall thickness 15 and the second wall thickness 16 to choose so that an assembly of the assembled disk set 2 in the friction switching element 1 becomes impossible. The difference between the first wall thickness 15 and the second wall thickness 16 should be chosen so that also at the wear limit of the inner and outer plates 3 . 4 the function of the friction switching element 1 is not affected.

Of course, the inventive design of inner plate can be 3 and outer lamella 4 realized mirrored in an analogous manner.

LIST OF REFERENCE NUMBERS

1

frictional shift

2

disk pack

3

inner plate

4

outer plate

5

External disk carrier

6

Inner disk carrier

7

supporting part

8th

actuator

9

longitudinal axis

10

Axial distance

11

total thickness

12

Face of 3

13

base section

14

gearing

15

First wall thickness

16

Second wall thickness

17

Face of 4

18

distance

19

Axial extent of 2

20

Axial extent of 2

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102011004585 A1 [0003]

Claims (11)

Disk set (2) for a Reibschaltelement (1), in particular a multi-disc brake or a multi-plate clutch, with annularly executed first fins (3) and second fins (4) to be arranged alternately in the axial direction one behind the other, wherein the first fins (3) at least one end face (12) with one end face (17) of the second lamellae (4) in frictional contact can be brought in an overlap region, characterized in that the first lamellae (3) each in the region of the end faces (12) has a first wall thickness (15 ) and at a radial base portion (13) have a second wall thickness (16), wherein the first wall thickness (15) is less than the second wall thickness (16), and the second fins (4) each have a substantially uniform wall thickness in the region of their Have end surfaces (17) and an adjoining radial base portion. Disc pack (2) to Claim 1 , characterized in that the base portion (13) has a radially oriented toothing (14). Disc pack (2) to Claim 1 or 2 , characterized in that the first fins are formed as outer plates (4) or inner plates (3). Disc pack (2) according to one of Claims 1 to 3 , characterized in that the base region (13) of the first lamellae (3) by a forming process has a relation to the first wall thickness (15) between the end faces (12) larger second wall thickness (16) received. Disc pack (2) according to one of Claims 1 to 3 , characterized in that the different wall thicknesses (15, 16) between the end faces (12) and in the base region (14) of the first lamellae (3) are produced by a machining operation. Disc pack (2) according to one of Claims 1 to 3 , characterized in that for the formation of the different wall thicknesses (15, 16) between the end faces (12) and in the base region (14) of the first lamellae (3) a two-sided arrangement of additional components in the base region (14) is provided. Disc pack (2) according to one of the preceding claims, characterized in that the first lamellae (3) are designed in several parts, wherein at least one end face (12) is provided with at least one friction lining element, wherein the common first wall thickness (15) is less than the second Wall thickness (16) of the base portion (14). Friction shift element (1), in particular multi-disc brake or multi-disc clutch, comprising a disk set (2) with axially successively to be arranged in succession first fins (3) and second fins (4) between a stationary support member (7) and an axially displaceable actuating element (8 ), wherein an adjustable axial distance (10) between the support part (7) and the actuating element (8) in the unactuated state of the Reibschaltelements (1) is greater than a total thickness (11) of the plate pack (1), characterized in that the first lamellae (3) each have a first wall thickness (15) in the region of an end face (12) and a second wall thickness (16) on a radial base section (13), the first wall thickness (15) being less than the second wall thickness (16 ), and the second fins (4) each have a substantially uniform wall thickness between their end faces (17) and in the region of a subsequent thereto having radial end base portion. Friction shift element (1) after Claim 8 , characterized in that the difference between the first and second wall thickness (15, 16) is selected such that it is greater than the sum of wall thickness tolerances of all slats (3, 4) of the plate pack (2). Friction shift element (1) after Claim 8 or 9 , characterized in that the difference between the first wall thickness (15) and the second wall thickness (16) is selected such that, in the case of an arrangement of at least two first lamellae (3), a total thickness (11) of the lamella packet (3) is set in succession, so that no mountability of the disk set (2) between the stationary support member (7) and the axially displaceable actuating element (8) is given. Method for checking the arrangement of a disk set (2) for a Reibschaltelement (1), in particular a multi-disc brake or multi-plate clutch, wherein in the axial direction alternately in succession first fins (3) and second fins (3) between a stationary support member (7) and an axial slidable actuating element (8) of the Reibschaltelementes (1) are to be arranged, wherein between the support member (7) and the actuating element (8) in an unactuated state of the Reibschaltelements (1) an axial distance (10) is set, which is greater than a total thickness ( 11) of the disk pack (2), characterized in that the first lamellae (3) each between end faces (12) has a first wall thickness (15) and at a radial base portion (13) has a second wall thickness (16), wherein the first Wall thickness (15) is less than the second wall thickness (16), and the second blades (4) each have a substantially uniform wall thickness between theirs End faces (17) and in the region of an adjoining radial base portion, wherein the difference between the first wall thickness (15) and second wall thickness (16) is selected such that it is greater than the sum of wall thickness tolerances of all slats (3, 4) in which the axial extent (19, 20) of the disk pack (2) is measured to check compliance with the correct sequence of the arrangement of the first disks (3) and second disks (4) and with the axial distance 7) and the actuating element (8) in the unactuated state of the Reibschaltelements (1) is compared.

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