DE102019119036A1 - Fluidic actuation system - Google Patents

Abstract

The invention relates to a fluidic actuation system (20) for fluidic actuation of clutch and / or brake devices, each of which comprises an annular piston which delimits a fluid pressure chamber in an annular space. In order to simplify the production of the fluidic actuation system (20), the fluidic actuation system comprises (20) to represent at least four clutch and / or braking devices at least four separate ring cylinder bodies

Description

The invention relates to a fluidic actuation system for the fluidic actuation of clutch and / or brake devices, each of which comprises an annular piston which delimits a fluid pressure space in an annular space.

From the German Offenlegungsschrift DE 10 2017 127 695 A1 a drive train for a hybrid motor vehicle is known, with a transmission input shaft which is in operative relationship via a first partial drive train with a first electrical machine and an internal combustion engine for torque transmission and which is in operative relation via a second partial drive train with a second electrical machine for torque transmission, the drive train comprises a separating clutch, which is designed as a multi-plate clutch and which is actuated via a hydraulic central release. From the German Offenlegungsschrift DE 10 2011 115 078 A1 a hybrid transmission is known as a power converter and identification converter between a drive shaft connected to an internal combustion engine, a battery and an output shaft, the hybrid transmission having a first electric motor and a second electric motor, which are connected to one another and to the battery via a power control, and where the Hybrid transmission has a multi-shaft planetary gear for superimposing the power flows from the two electric motors, from the internal combustion engine and from the output shaft. From the German Offenlegungsschrift DE 10 2011 081 298 A1 a slave cylinder for a hydraulic release system of a friction clutch of a motor vehicle with an essentially concentric slave cylinder housing with a longitudinal axis is known, which has an annular space in which an annular piston, which is provided with a seal on the pressure space side, is axially displaceably guided to form an annular pressure chamber. The slave cylinder is also referred to as CSC, with the capital letters CSC standing for the English terms Concentric Slave Cylinder. In German, the term central slave cylinder is also used for the slave cylinder.

The object of the invention is to simplify the production of a fluidic actuation system for the fluidic actuation of clutch and / or brake devices, each of which comprises an annular piston which delimits a fluid pressure space in an annular space.

The object is achieved in a fluidic actuation system for fluidic actuation of clutch and / or brake devices, each comprising an annular piston that delimits a fluid pressure chamber in an annular space, in that the fluidic actuation system for displaying at least four clutch and / or brake devices comprises at least four separate ring cylinder bodies. The fluidic actuation system is preferably combined with a hybrid module which comprises at least four, in particular exactly four, clutch and / or brake devices, two of which are designed as clutches and two as brakes. The two clutches are designed in a drive train equipped with the hybrid module, for example as a K0 clutch or as a K3 clutch. In the drive train equipped with the hybrid module, the two brakes are preferably assigned to a planetary gear, where the brakes are used, for example, to brake two planetary gear elements independently of one another. The drive train with the hybrid module is preferably designed as a P1 / P3 hybrid system. The designation P1 stands for an electrical machine that is assigned to an output of an internal combustion engine. The designation P3 stands for an electrical machine that is assigned to a gear output of a gear, in particular the planetary gear described above. Conventional housings of fluidic actuation systems are, for example, machined from one piece. As a result of the claimed design with at least four separate ring cylinder bodies, the manufacturing effort for producing a housing for the fluidic actuation system can be reduced considerably. The separate ring cylinder bodies can be attached to one another and / or to at least one further housing body.

A preferred exemplary embodiment of the fluidic actuation system is characterized in that the annular cylinder bodies are designed as metallic annular sleeves with an annular cross section. The metallic ring sleeves are formed, for example, from a steel material or from an aluminum material. The metallic ring sleeves can be produced by forming, in particular by deep drawing. As a result, a considerable amount of material can be saved in the manufacture of the ring cylinder bodies, in particular in comparison to the machining of ring cylinder bodies. The ring cross section is preferably a ring cross section that is open on one side. The ring cross-section is, for example, U-shaped.

Another preferred exemplary embodiment of the fluidic actuation system is characterized in that at least one of the ring cylinder bodies is materially connected to a housing body at at least one connection point. The material connection can be produced, for example, by spot welding. Among other things, this provides the advantage that the tightness of a Fluid pressure space, which is provided in the annular cylinder body, is not impaired by the connection point.

Another preferred embodiment of the fluidic actuation system is characterized in that at least one of the ring cylinder bodies is connected to a housing body or the housing body at at least one connection point by at least one deformed and / or joint connection, such as clinching. Clinching is a pressure joint or clinching joint. By clinching sheet metal parts can advantageously be connected without using an additional material. Such connections are particularly inexpensive to produce and at the same time enable a tight connection. This enables the ring cylinder body to be fastened directly with its pressure chamber floor to the housing body or to a further ring cylinder body.

Another preferred exemplary embodiment of the fluidic actuation system is characterized in that at least one of the ring cylinder bodies is connected to a housing body or to the housing body at at least one connection point by at least one fastening element, such as a rivet connection element. This creates a further possibility of fastening the ring cylinder bodies to one another or to the housing body without great expense. The rivet connection elements can be combined with at least one sealing element, such as an O-ring, for better sealing. Alternatively or additionally, the rivet connection elements can be provided with a cone at at least one end, in particular one end facing the annular cylinder body, which cooperates in a sealing manner with a mating cone on the annular cylinder body.

Another preferred exemplary embodiment of the fluidic actuation system is characterized in that at least one of the ring cylinder bodies is designed as a deep-drawn part. This considerably simplifies the manufacture of the ring cylinder body. The ring cylinder bodies can be produced inexpensively in large numbers by deep drawing. A suitable sheet steel material or aluminum sheet material is used, for example, for deep drawing the ring cylinder body.

Another preferred embodiment of the fluidic actuation system is characterized in that at least two of the ring cylinder bodies are connected to one another, in particular by at least one fastening element, such as a rivet connection element, and / or by at least one deformed connection, such as clinching, and / or cohesively. The ring cylinder bodies are advantageously fastened to the housing body or to a further ring cylinder body at several points, for example at at least three connection points which are preferably evenly distributed over a circumference of the respective ring cylinder body. The connection points can all be made the same. But it is also possible to use different types of fastening options described above at the various connection points. The ring cylinder bodies are preferably fastened to one another through the housing body. For this purpose, the housing body has a corresponding recess at the connection point at which two ring cylinder bodies are connected to one another.

Another preferred embodiment of the fluidic actuation system is characterized in that the housing body has a C-shaped shape with a recess which serves to receive a connection adapter body which comprises fluid channels that are fluidically connected to the fluid pressure chambers in the ring cylinder bodies. The free space resulting from the C-shaped shape of the housing body is used particularly advantageously to accommodate the connection adapter body. The connection adapter body can thus be attached to the housing body in a simple manner in order to enable the fluidic connection of the fluidic actuation system to a corresponding fluid system.

Another preferred exemplary embodiment of the fluidic actuation system is characterized in that the housing body is formed from a metallic material. The housing body is preferably formed from the same material from which the ring cylinder bodies are formed. This simplifies the attachment of the ring cylinder body to the housing body.

Another preferred exemplary embodiment of the fluidic actuation system is characterized in that the connection adapter body is formed from a plastic material. The connection adapter body is, for example, an injection-molded part in which the fluid channels are implemented, for example, by drawing cores or slides.

The invention further relates to an annular cylinder body, in particular an annular sleeve, and / or a housing body for a previously described fluidic actuation system. The parts mentioned can be traded separately.

The invention optionally also relates to a kit for producing different fluidic actuation systems as described above.

The invention optionally also relates to a hybrid module and / or a drive train with a previously described fluidic actuation system.

• 1 eine schematische Darstellung eines fluidischen Betätigungssystems zum fluidischen Betätigen von vier Kupplungs- und/oder Bremseinrichtungen in einer Seitenansicht;
• 2 eine perspektivische Schnittdarstellung des fluidischen Betätigungssystems auf 1 ;
• 3 einen Ausschnitt aus 1 mit einem Anschlussadapterkörper im Schnitt;
• 4 eine vergrößerte Darstellung einer Anschlussverbindung zwischen dem Anschlussadapterkörper aus 3 und einem Ringzylinderkörper des fluidischen Betätigungssystems im Schnitt;
• 5 einen Ausschnitt des fluidischen Betätigungssystems aus den 1 und 2 im Querschnitt durch vier Ringzylinderkörper;
• 6 eine ähnliche Darstellung wie in 5 mit drei Umform- und/oder Fügeverbindungen und einer Nietverbindung;
• 7 einen vergrößerten Ausschnitt aus 6 ohne eine Verbindung zwischen einem Ringzylinderkörper und einem Gehäusekörper;
• 8 einen in Umfangsrichtung gegenüber 7 versetzt angeordneten Schnitt mit einer Umform- und/oder Fügeverbindung zwischen dem Ringzylinderkörper und dem Gehäusekörper;
• 9 eine ähnliche Darstellung wie in 6 mit drei stoffschlüssigen Verbindungen und einer Nietverbindung;
• 10 eine verkleinerte Teilschnittdarstellung zu 9 zur Veranschaulichung der Anordnung von drei stoffschlüssigen Verbindungsstellen:
• 11 eine ähnliche Darstellung wie in den 6 und 9 mit vier Nietverbindungen;
• 12 einen vergrößerten Ausschnitt einer Einzelheit aus 11 mit einer zusätzlichen Dichtung;
• 13 eine ähnliche Darstellung wie in 11 mit zusätzlichen Dichtkonuspaarungen an den Nietverbindungen; und
• 14 eine schematische Darstellung eines Antriebsstrangs eines Kraftfahrzeugs mit einem Hybridmodul und vier Kupplungs- und/oder Bremseinrichtungen, die mit einem fluidischen Betätigungssystem, wie es in den 1 bis 13 dargestellt ist, betätigt werden.

Further advantages, features and details of the invention emerge from the following description, in which various exemplary embodiments are described in detail with reference to the drawing. Show it:

• 1 a schematic representation of a fluidic actuation system for fluidic actuation of four clutch and / or brake devices in a side view;
• 2 a perspective sectional view of the fluidic actuation system 1 ;
• 3 a section 1 with a connection adapter body in section;
• 4th an enlarged view of a connection connection between the connection adapter body 3 and an annular cylinder body of the fluidic actuation system in section;
• 5 a section of the fluidic actuation system from the 1 and 2 in cross section through four ring cylinder bodies;
• 6th a similar representation as in 5 with three formed and / or joint connections and one riveted connection;
• 7th an enlarged section 6th without a connection between a ring cylinder body and a housing body;
• 8th one opposite in the circumferential direction 7th staggered section with a deformed and / or joint connection between the annular cylinder body and the housing body;
• 9 a similar representation as in 6th with three material connections and one riveted connection;
• 10 a scaled-down partial sectional view 9 to illustrate the arrangement of three material connection points:
• 11 a similar representation as in the 6th and 9 with four rivet connections;
• 12 an enlarged section of a detail 11 with an additional seal;
• 13 a similar representation as in 11 with additional sealing cone pairs on the rivet connections; and
• 14th a schematic representation of a drive train of a motor vehicle with a hybrid module and four clutch and / or brake devices, which with a fluidic actuation system, as it is in the 1 to 13 is shown to be operated.

In 14th is a powertrain 1 of a motor vehicle with a hybrid module 2 shown schematically. The drive train 1 includes an internal combustion engine 3 and at least one electrical machine 4th , 5 . The electric machine 5 is like a so-called P 1 arrangement at the output of a hybrid transmission 9 arranged. The electric machine 4th is like a so-called P3 arrangement at the output of the internal combustion engine 3 arranged.

The hybrid transmission 9 includes a transmission input shaft assembly 7th and a transmission output shaft assembly 8th . A differential 10 is in 14th below the transmission output shaft assembly 8th arranged.

The hybrid module 2 comprises a total of four clutch and / or braking devices 11 to 14th . The clutch and / or braking devices 11 and 12 are designed as couplings. The coupling 11 can also be referred to as a KO coupling. The coupling 12 can also be referred to as a K3 coupling.

The clutch and / or braking devices 13 , 14th are designed as brakes. The brake 13 represents a first brake which is used to brake a planetary gear element of a planetary gear arrangement 15th in the hybrid transmission 9 serves. The brake 14th represents a second brake that is used to brake a further planetary gear element of the planetary gear arrangement 15th in the hybrid transmission 9 serves.

The total of four clutch and / or braking devices ( 11 to 14th in 14th ) are operated by a fluidic actuation system 20th fluidically operated. The fluidic actuation system 20th is in the 1 to 13 shown in different views and embodiments. To designate the same or similar parts, the 1 to 13 the same reference numerals are used. In the following, the common features of the various exemplary embodiments will first be discussed. The differences between the individual exemplary embodiments are then explained.

The fluidic actuation system 20th includes four annular pistons 21st to 24 . The annular piston 21st to 24 are equipped in a known manner with seals and each delimit a ring cylinder body 31 to 34 Fluid pressure spaces 25th to 28 . The ring cylinder body 31 to 34 are as deep drawn Executed steel sleeves and each have a substantially U-shaped cross-section, which is used for axial guidance of the annular piston 21st to 24 serves.

The ring cylinder body designed as deep-drawn steel sleeves 31 to 34 are inexpensive to manufacture in large numbers. A complex housing can thus advantageously be dispensed with. The ring cylinder body 31 to 34 are partially attached to each other and to a housing body 30. For fastening the ring cylinder body 31 to 34 Different types of connection can be used to one another and to the housing body 30.

The housing body 30 includes fastening areas on the outside 29 that are designed as fastening eyes. The fastening eyes are used to implement fastening means, such as screws, with which the housing body 30 is connected to the fluidic actuation system 20th to a (not shown) housing in the drive train ( 1 in 14th ) can be grown.

The ring cylinder body 34 is in one piece with an inner tubular body via a shoulder 36 connected, the one shaft bushing through the fluidic actuation system 20th enables. On the housing body 30 is an outer disk carrier 37 the brakes, preferably designed as multi-disc brakes ( 13 , 14th in 14th ) attached.

The housing body 30 is formed, for example, from steel or aluminum and as a C-profile with a recess 38 executed. The recess 38 serves to accommodate a connection adapter body 40 , the how to get in 3 sees fluid channels 41 to 45 includes. The fluid channels 41 to 44 represent connection channels that connect to the fluid pressure chambers 25th to 28 stay in contact. The fluid channel 45 is used, for example, to supply lubricant and / or cooling medium.

In 4th is shown in a sectional view, as the ring cylinder body 32 fluidically to the connection adapter body 40 can be connected. The ring cylinder body 32 includes a connector 47 , which is integral with the ring cylinder body 32 connected is. The connecting piece 47 connects the fluid pressure space 26th with the fluid channel 42 in the connector adapter body 40 . For sealing is between the connection piece 47 and a complementary opening in the connector adapter body 40 a seal designed as an O-ring, for example 46 arranged.

In the 6th to 8th is an embodiment of the fluidic actuation system 20th shown in which the ring cylinder body 31 to 34 are fastened to one another or to the housing body 30 with the aid of clinch connections. At a junction 51 is the ring cylinder body 31 with his the ring piston 21st The fluid pressure chamber floor facing away from it is attached to the housing body 30 by a clinch connection, also referred to as a pressure joint connection.

At a junction 52 are the two ring cylinder bodies 32 and 34 with their abutting fluid pressure chamber bottoms that form the annular piston 22nd respectively 24 are turned away, also attached to one another by a clinch connection. The connection point 52 is within a recess 58 arranged in the housing body 30.

The ring cylinder body 33 is also by a clinch connection at a connection point 53 attached to the case body 30. The housing body 30 is for realizing the clinch connection at the connection point 53 with a recess 55 Mistake.

The recess 55 is, as can be seen from a synopsis of the 6th to 8th results, designed as an annular space. Between the junctions 52 and 53 is the outer plate carrier 37 with the help of a rivet connecting element 56 attached to the case body 30.

The in 9 illustrated embodiment of the fluidic actuation system 20th is the ring cylinder body 31 at a junction 61 materially connected to the housing body 30 at its fluid pressure chamber floor. At a junction 62 are the two ring cylinder bodies 32 and 34 materially connected to one another at their fluid pressure chamber floors.

The connection point 62 is within a recess 68 of the housing body 30 is arranged. At a junction 63 is the ring cylinder body 33 materially connected to the housing body 30. The material connection at the connection points 61 to 63 is preferably made by spot welding.

In 10 is an example of the ring cylinder body ( 33 in 9 ) shown that the attachment of the ring cylinder body preferably at a total of three connection points 63 , 65 and 66 he follows. The three connecting points 63 , 65 , 66 , which are designed as integral connections in the associated embodiment, are evenly distributed over a circumference of the housing body 30. The connection points 63 , 65 and 66 are not in the area of the recess 38 arranged in the housing body 30 for receiving the connection adapter body 40 serves.

In the 11 to 13 The illustrated embodiments are attached the ring cylinder body 31 to 34 on the housing body 30 at connection points 71 , 73 as well as to each other at a connection point 72 by riveted connections with appropriate rivet connection elements 76 , 74 and 75 . Heads of the rivet fasteners 74 to 76 are on one side each in the associated ring cylinder body 33 ; 32 , 34 ; 31 arranged.

In 12 is based on the example of the ring cylinder body 33 out 11 illustrates that for sealing between the head of the rivet connecting element 74 and the through hole in the ring cylinder body 33 at the junction 73 a seal designed as a sealing ring 77 can be arranged.

In 13 is illustrated how the tightness at the rivet joints 71 , 72 , 73 by cone pairings 81 ; 79 , 80 ; 78 can be improved. The cone pairings 78 to 81 increase the tightness through contact pressure between the rivet head and a conical cup on the respective ring cylinder body.

List of reference symbols

1

Powertrain

2

Hybrid module

3

Internal combustion engine

4th

electric machine

5

electric machine

7th

Transmission input shaft arrangement

8th

Transmission output shaft arrangement

9

Hybrid transmission

10

differential

11

Clutch and / or braking device

12

Clutch and / or braking device

13

Clutch and / or braking device

14th

Clutch and / or braking device

15th

Planetary gear arrangement

20th

fluidic actuation system

21st

Ring piston

22nd

Ring piston

23

Ring piston

24

Ring piston

25th

Fluid pressure space

26th

Fluid pressure space

27

Fluid pressure space

28

Fluid pressure space

29

Attachment area

20th

Housing body

31

Ring cylinder body

32

Ring cylinder body

33

Ring cylinder body

34

Ring cylinder body

36

Inner tube body

37

Outer disc carrier

38

Recess

40

Connection adapter body

41

Fluid channel

42

Fluid channel

43

Fluid channel

44

Fluid channel

45

Fluid channel

46

O-ring

47

Connection piece

51

Connection point

52

Connection point

53

Connection point

54

Connection point

55

Recess

56

Rivet fastener

58

Recess

61

Connection point

62

Connection point

63

Connection point

65

Connection point

66

Connection point

68

Recess

71

Connection point

72

Connection point

73

Connection point

74

Rivet fastener

75

Rivet fastener

76

Rivet fastener

77

Sealing ring

78

Cone pairing

79

Cone pairing

80

Cone pairing

81

Cone pairing

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was 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.

Patent literature cited

• DE 102017127695 A1 [0002]
• DE 102011115078 A1 [0002]
• DE 102011081298 A1 [0002]

Claims (10)

Fluidic actuation system (20) for fluidic actuation of clutch and / or brake devices (11-14), each comprising an annular piston (21-24) which delimits a fluid pressure chamber (24-28) in an annular space, characterized in that the fluidic actuation system (20) for representing at least four clutch and / or braking devices (11-14) comprises at least four separate ring cylinder bodies (31-34). Fluidic actuation system according to Claim 1 , characterized in that the ring cylinder bodies (31-34) are designed as metallic ring sleeves with an annular cross section. Fluidic actuation system according to one of the preceding claims, characterized in that at least one of the ring cylinder bodies (31, 33) is materially connected to a housing body (30) at at least one connection point (61, 63, 65, 66). Fluidic actuation system according to one of the preceding claims, characterized in that at least one of the ring cylinder bodies (31, 33) at at least one connection point (51, 53) by at least one deformed and / or joint connection, such as clinching, with one or the housing body (30 ) connected is. Fluidic actuation system according to one of the preceding claims, characterized in that at least one of the ring cylinder bodies (31, 33) at at least one connection point (71, 73) by at least one fastening element, such as a rivet connection element (76, 74), with one or the housing body ( 30) is connected. Fluidic actuation system according to one of the preceding claims, characterized in that at least one of the ring cylinder bodies (31-34) is designed as a deep-drawn part. Fluidic actuation system according to one of the preceding claims, characterized in that at least two of the ring cylinder bodies (32, 34), in particular by at least one fastening element, such as a rivet connection element (75), and / or by at least one deformed connection, such as clinching, and / or materially connected to each other. Fluidic actuation system according to one of the Claims 2 to 7th , characterized in that the housing body (30) has a C-shaped shape with a recess (38) which serves to receive a connection adapter body (40) which comprises fluid channels (41-44) which are fluidically connected to the fluid pressure chambers (25- 28) are connected in the ring cylinder bodies (31-34). Fluidic actuation system according to Claim 8 , characterized in that the housing body (30) is formed from a metallic material. Fluidic actuation system according to Claim 8 or 9 , characterized in that the connection adapter body (40) is formed from a plastic material.

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