DE102014218604A1 - Slat basket for a multiple clutch and a method for producing a lamella basket - Google Patents

Abstract

Slat basket for a multiple clutch, comprising at least the following components:
A first lamella receptacle for a first friction packet;
A second lamella receptacle for a second friction packet,
wherein the first fin receptacle and the second fin receptacle are integrally formed. Furthermore, the invention relates to a method for producing a lamella basket for a multiple clutch, comprising at least the following steps:
- Forming a sheet metal plate in a ring shape, which is flat in the radial direction;
- Forming a U-profile in the ring shape by cold forming, wherein the cold forming at the same time a first lamellar receptacle and a second lamellar receptacle are formed.
With the slat basket proposed here and the method for producing a slat basket, a cost-effective construction of a multiple clutch is possible, wherein at the same time a good introduction of force is converted to the friction plates.

Description

The invention relates to a slat basket for a multiple clutch and a method for producing a slat basket, in particular for a dual clutch of a motor vehicle.

Various configurations of lamella baskets are known from the prior art, in which a plurality of friction lamellae of a friction pack can be accommodated. The friction plates are suspended in the lamellar basket in such a way that they are axially displaceable and at the same time are rotationally fixed to the lamellar basket, wherein the lamella basket is in turn rotationally fixedly connected to an input shaft or output shaft of the friction clutch. Due to the axial displaceability of the friction disks in the disk holders, the friction disks can be pressed together, so that the alternately arranged friction disks, which are suspended opposite one another in a respective inner disk carrier, can be frictionally connected, but can also be released again. By using a plurality of friction plates, the friction surface is increased with each blade and thus increases the transmittable torque. A disadvantage of the previously known configurations is that they are either expensive to produce or expensive to install.

On this basis, the present invention has the object, at least partially overcome the known from the prior art disadvantages. The object is solved by the features of the independent claims. Advantageous developments are the subject of the dependent claims.

• – eine erste Lamellenaufnahme für ein erstes Reibpaket;
• – eine zweite Lamellenaufnahme für ein zweites Reibpaket,

wobei die erste Lamellenaufnahme und die zweite Lamellenaufnahme einstückig ausgebildet sind. The invention relates to a lamellar basket for a multiple clutch, comprising at least the following components:

• A first lamella receptacle for a first friction packet;
• A second lamella receptacle for a second friction packet,

wherein the first fin receptacle and the second fin receptacle are integrally formed.

The lamella basket is adapted to produce an axially displaceable rotationally fixed connection between the friction plates and an input shaft or output shaft. The slat basket proposed here has a first slat receptacle and a second slat receptacle, wherein the first slat receptacle is set up for a first friction pack and the second slat receptacle is set up for a second friction pack. This means that opposite friction disks, for example inner disks, are accommodated in a disk carrier, for example an inner disk carrier, between the friction disks which can be accommodated in the disk holder, for example outer disks. The opposing friction plates are neither axially nor rotationally connected to the lamellae basket described here, but they are alone connected via a frictional connection with the recorded in the respective lamellae friction plates such that a torque of the lamellae basket is transferable to the opposite lamellar basket. The pressing of the slats can be switched via an actuating device.

Here, the first lamella receptacle and the second lamella receptacle are integrally formed, so that they are rotationally fixed to each other. When used, for example, in a double clutch of a motor vehicle, the slat basket proposed here would be used on the input side, that is, firmly connected to the output shaft of a drive unit. The friction plates of the first plate holder would then be connectable to a first output shaft and the friction plates of the second plate holder would be connectable to a second output shaft, which are connectable to the two transmission shafts of a double gear.

Due to the one-piece design of the lamellar basket is achieved that the lamella recordings are rotatably connected to each other and thus do not have to be laboriously assembled together. At the same time, the manufacture of the lamellar basket is cost-effective because the lamellae receptacles can be manufactured in one piece and in a common manufacturing process.

According to a further advantageous embodiment of the lamellae basket, at least one of the lamellae receptacles is designed as a toothing, wherein the toothing is preferably formed by cold deformation of the lamellae receptacle.

The toothing is particularly suitable for receiving friction plates slidably and at the same time rotationally fixed. In this case, the toothing is particularly preferably designed as a deformation of the material and not as a toothed toothing. Most preferably, the toothing is formed by cold forming, so that the teeth can be produced inexpensively.

According to a further advantageous embodiment of the slat basket, the first slat receptacle and the second slat receptacle in the circular segment on a U-profile.

The lamellar basket is essentially rotationally symmetrical, so that a Torque transmission is unbalance transferable. Here it is now proposed to make the first and second lamella receptacle so that the substantially annular lamellar basket has a U-profile in a segmental section, ie a circle segment. In a sectional view of rotary elements in a conventional technical drawing, the first lamellae holder and the second lamellae holder can thus be recognized as "U". In other words, the U-profile is a sufficient segment of the lamellae basket, which forms the first lamella receptacle and the second lamellar receptacle by a radius of a center of rotation spaced as a rotational body. The opening of the U-profile is preferably in the axial direction, so in a conventional technical drawing with horizontal axis of rotation, the U-profile is shown lying. This structure is particularly easy to manufacture and particularly suitable for a space-saving design of a multiple clutch.

According to a further advantageous embodiment of the lamellae basket, the two lamellae holders are produced by a common cold forming process when the U-profile is produced.

In this advantageous embodiment, the lamellar recordings do not have to be incorporated in retrospect into the U-profile, but can be generated together during the cold forming process. For example, the lamellar recordings can be formed as a toothing, which are pressed into the material when the U-profile is produced.

According to a further advantageous embodiment of the slat basket, the first slat receptacle is arranged in the interior of the U-profile and the second slat receptacle is arranged on the outside of the U-profile.

In this advantageous embodiment of the slat basket, the space which is generated by the U-profile, optimally used. For example, the first lamella receptacle may be arranged on the outer circumference of the U-profile inside the U-profile and the corresponding inner disk carrier is correspondingly arranged on the opposite wall of the U-profile (spaced and unconnected). The second lamella receptacle can be arranged on the outside of the U-profile, that is to say on the outer radius or on the inner radius of the lamella basket.

Preferably, the second lamella receptacle is located on the inner radius of the U-profile. In this arrangement, the U-profile can be designed small and in a dual clutch, the input side friction plates, which are permanently rotated, located on each outer circumference, so that their higher inertia by the larger radius contributes to the smoothing of the drive torque via the input shaft and the inertia is not detrimental to the changing rotational speeds of the output shafts. At the same time, the U-profile can be made small, so that the stability and rigidity of the U-profile or the slat basket is high.

According to a further advantageous embodiment of the lamellae basket, a coupling connection for transmitting a torque to the first lamella receptacle and to the second lamella receptacle, wherein the coupling connection is a separate component and is connected to the first lamella receptacle and to the second lamella receptacle.

The coupling connection proposed here bridges the distance between an input shaft and the first disk receptacle and the second disk receptacle, so that a desired radius for transmitting a desired torque is achieved. In this case, in contrast to known arrangements, the coupling connection is not formed integrally with a lamellar receptacle, but is mounted in retrospect with two lamellae recordings. The assembly can preferably take place by welding, soldering, gluing or other cohesive connections, and positive engagement and adhesion are not excluded in principle. Due to the separate design of the coupling connection, both components can be designed and constructed separately for the different tasks, namely the torque transmission over a large radius and the torque transmission over a small distance to the friction plates, each.

According to a further advantageous embodiment of the slat basket is made of sheet metal.

By manufacturing the lamellar basket made of sheet metal advantageous favorable manufacturing processes such as deep drawing and other cold forming operations can be used. In addition, the teeth can be formed by the formation of waves in the material, which can produce a material-friendly and very rigid teeth. In addition, stabilized by such a corrugated toothing in the U-profile of the slat basket. In principle, such a lamellar basket could also be forged, for example, but such high strengths are not required for most applications.

• – Formen einer Blechplatine in Ringform, die in radialer Erstreckung flach ist;
• – Formen eines U-Profils in die Ringform durch Kaltumformen, wobei beim Kaltumformen zugleich eine erste Lamellenaufnahme und eine zweite Lamellenaufnahme gebildet werden.

According to a further aspect of the invention, a method for producing a lamella basket for a multiple clutch is proposed which comprises at least the following steps:

• - Forming a sheet metal plate in a ring shape, which is flat in the radial direction;
• - Forming a U-profile in the ring shape by cold forming, wherein the cold forming at the same time a first lamellar receptacle and a second lamellar receptacle are formed.

First, a sheet metal blank is made into a ring shape, for example, by punching or laser cutting from a sheet raw material, so that the sheet material extends flat in a ring shape. The sheet material thus forms an area in the plane of the radius of the ring. This annular sheet metal blank is placed on a mold and then embossed a U-profile, so that there is a U-profile in the circular segment. At the same time, the first lamella receptacle and the second lamellar receptacle are formed at the same time, this preferably giving a corrugation in the outer diameter and in the inner diameter of the U-profile, which serves as toothing for the friction lamina to be accommodated. The sheet metal plate produced by this method is thus bent on its inner circumference to one side axially by 90 ° and also bent on the outer circumference in the same direction by 90 °. Most preferably, the lamellar basket is produced by deep drawing, so that the sheet metal blank can be brought into the final shape with a single step. Subsequently, a coupling connection can still be attached to the U-profile.

• – zwei Reibpakete mit jeweils einer Mehrzahl von Reiblamellen, über die im angepressten Zustand ein Drehmoment übertragbar ist;
• – ein Lamellenkorb gemäß obiger Beschreibung, der bevorzugt nach einem Verfahren gemäß obiger Beschreibung hergestellt ist, zur Aufnahme der zwei Reibpakete, wobei bevorzugt die Kupplungsanbindung zugleich einen Wandungsabschnitt zumindest einer hydraulischen Betätigungseinrichtung für zumindest eines der Reibpakete bildet.

According to a further aspect of the invention, a double clutch with an axis of rotation for releasably connecting an output shaft to a drive train is proposed, which has at least the following components:

• - Two friction packs, each with a plurality of friction plates, on the torque in the pressed state is transferable;
• A lamellar basket according to the above description, which is preferably produced by a method according to the above description, for receiving the two friction packs, wherein preferably the coupling connection at the same time forms a wall section of at least one hydraulic actuating device for at least one of the friction packs.

The dual clutch is adapted to releasably transfer torque from an output shaft, advantageously via a double shift transmission, to a drive train and vice versa. This is usually achieved by means of a respective friction pack, which in each case has a plurality of axially displaceable, generally rotationally fixed with the output shaft, friction disks which can be pressed against a corresponding number of opposing friction disks. As a result of the contact force results in a frictional force over the friction surfaces, which multiplied by the average radius of the friction surfaces results in a transmissible torque. The slat basket proposed here allows a space-saving and stable construction.

According to a further aspect of the invention, a motor vehicle is proposed, which has a drive unit with an output shaft, a drive train and a dual clutch as described above.

Most motor vehicles today have a front-wheel drive and therefore preferably arrange the drive unit, for example an internal combustion engine or an electric motor, in front of the driver's cab and transversely to the main drive direction. The space is particularly small in such an arrangement and it is therefore particularly advantageous to use a friction clutch small size.

The installation space situation for passenger cars of the small car class according to European classification is exacerbated. The units used in a passenger car of the small car class are not significantly reduced compared to passenger cars larger car classes. Nevertheless, the available space for small cars is much smaller. With the double clutch proposed here, a construction of small size and at the same time cost-effective production is possible.

Passenger cars are classified according to vehicle class according to, for example, size, price, weight, power, but this definition is subject to constant change according to the needs of the market. In the US market, vehicles of the class small cars and microcars are classified according to European classification of the class of subcompact car and in the British market they correspond to the class Supermini, for example, the class City Car. Examples of the micro car class are a Volkswagen Fox or a Renault Twingo. Examples of the small car class are an Alfa Romeo Mito, Volkswagen Polo, Ford Fiesta or Renault Clio.

The features listed individually in the claims can be combined with one another in any technologically meaningful manner and can be supplemented by explanatory facts from the description and details from the figures, wherein further embodiments of the invention are shown.

The invention and the technical environment will be explained in more detail with reference to FIGS. The figures show particularly preferred embodiments, to which the invention is not limited. In particular, it should be noted that the figures and in particular the illustrated proportions are only schematic. Show it:

1 a double clutch with a lamellar basket; and

2 : a motor vehicle with a double clutch.

1 shows a section of a multiple clutch 2 , which is designed here as a double clutch. The first rubbing package 4 and the second friction package 6 be by means of a first gearing 7 a first lamellae recording 3 or by means of a second toothing 8th a second lamellae recording 5 axially displaceable, ie in the direction of the axis of rotation 11 held rotationally stable. The first lamella holder 3 and the second lamellae holder 5 are through a U-profile 9 integrally formed. The U-profile 9 is in this example cohesively with a coupling connection 10 fixed. The first rubbing package 4 and the second friction package 6 each include a plurality of first friction plates 14 or second friction plates 15 , each alternating with a first inner disc carrier 22 or second plate carrier 23 and the first lamellar intake 3 or second lamellae recording 5 are rotationally fixed. The friction packages 4 and 5 are each by a first actuator 24 or a second actuating element 25 Pressed so that a torque releasable from the lamellar basket 1 on a corresponding inner disk carrier 22 or 23 is transferable. The second actuator 25 This is done by a hydraulic actuator 16 moves between the clutch connection 10 and the second actuator 25 is formed.

2 shows a motor vehicle 17 with a drive unit 18 , which have their output shaft 12 by means of a multiple clutch 2 detachable with an here only purely schematically illustrated Anriebsstrang 13 is connectable. The drive unit 18 is shown here as an internal combustion engine and is located with its motor axis 21 transverse to the longitudinal axis 20 and in front of the driver's cab 19 of the motor vehicle 17 , The motor axis 21 Aligns with the axis of rotation 11 the multiple clutch 2 ,

With the slat basket proposed here and the method for producing a slat basket, a cost-effective construction of a multiple clutch is possible, wherein at the same time a good introduction of force is converted to the friction plates.

LIST OF REFERENCE NUMBERS

1

 lamella cage

2

 Multiple coupling

3

 first lamella recording

4

 first friction package

5

 second lamellae recording

6

 second friction package

7

 first gearing

8th

 second gearing

9

 U-profile

10

 coupling connection

11

 axis of rotation

12

 output shaft

13

 powertrain

14

 first friction plates

15

 second friction plates

16

 hydraulic actuator

17

 motor vehicle

18

 drive unit

19

 cab

20

 longitudinal axis

21

 motor axis

22

 first inner disk carrier

23

 second inner disk carrier

24

 first actuating element

25

 second actuator

Claims (10)

Slat basket ( 1 ) for a multiple clutch ( 2 ), comprising at least the following components: - a first lamella receptacle ( 3 ) for a first friction package ( 4 ); - a second lamella receptacle ( 5 ) for a second friction package ( 6 ), wherein the first lamella receptacle ( 3 ) and the second lamella receptacle ( 5 ) are integrally formed. Slat basket ( 1 ) according to claim 1, wherein at least one of the lamellar receptacles ( 3 . 5 ) as interlocking ( 7 . 8th ), wherein the toothing ( 7 . 8th ) preferably by cold forming the lamellar receptacle ( 3 . 5 ) is formed. Slat basket ( 1 ) according to claim 1 or 2, wherein the first lamellar receptacle ( 3 ) and the second lamella receptacle ( 5 ) in the circular segment a U-profile ( 9 ) having. Slat basket ( 1 ) according to claim 3, wherein the two lamellar recordings ( 3 . 5 ) by a common cold forming process when creating the U-profile ( 9 ) are generated. Slat basket ( 1 ) according to claim 3 or 4, wherein the first lamellar receptacle ( 3 ) inside the U-profile ( 9 ) is arranged and the second lamellar receptacle ( 5 ) on the outside of the U-profile ( 9 ) is arranged. Slat basket ( 1 ) according to one of the preceding claims, wherein furthermore a coupling connection ( 10 ) for transmitting a torque to the first lamella receptacle ( 3 ) and on the second lamella receptacle ( 5 ), wherein the coupling connection ( 10 ) is a separate component and with the first lamella receptacle ( 3 ) and with the second lamella receptacle ( 5 ) connected is. Slat basket ( 1 ) according to one of the preceding claims, wherein the lamellar basket ( 1 ) is made of sheet metal. Method for producing a lamellar basket ( 1 ) for a multiple clutch ( 2 ), comprising at least the following steps: - forming a sheet metal blank in a ring shape, which is flat in the radial extent; - forming a U-profile ( 9 ) in the ring shape by cold forming, wherein during cold forming at the same time a first lamellar receptacle ( 3 ) and a second lamella receptacle ( 5 ) are formed. Double coupling ( 2 ) with a rotation axis ( 11 ) for releasably connecting an output shaft ( 12 ) with a drive train ( 13 ), comprising at least the following components: - two friction packs ( 4 . 6 ) each having a plurality of friction plates ( 14 . 15 ), over which in the pressed state a torque is transferable; - a lamellar basket ( 1 ) according to one of claims 1 to 7, which is preferably produced by a method according to claim 8, for receiving the two friction packs ( 4 . 6 ), wherein preferably a coupling connection ( 10 ) at the same time a wall portion of at least one hydraulic actuator ( 16 ) for at least one of the friction packages ( 4 . 6 ). Motor vehicle ( 17 ) comprising a drive unit ( 18 ) with an output shaft ( 12 ), a powertrain ( 13 ) and a double clutch ( 2 ) according to claim 9.

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