DE102017126859A1 - Actuation system for a clutch - Google Patents

Abstract

The invention relates to an actuating system (111) for a clutch, comprising at least one slave cylinder (10) in which a slave piston is arranged to be moved back and forth, with which the clutch is actuated via an actuating bearing (2), and with a Wegmesseinrichtung.Um To simplify the distance measurement, the actuating bearing (2) is assigned a wobble compensation device (40) with a relative to the slave cylinder (10) movable sensor holder (90) of the path measuring device.

Description

The invention relates to an actuating system for a clutch, with at least one slave cylinder, in which a slave piston is arranged to move back and forth, with which the clutch is actuated via an actuating bearing, and with a displacement measuring device.

From the German patent application DE 10 2012 222 458 A1 is a device for disengaging a clutch, in particular a clutch in the drive train of a motor vehicle, known with a housing which is arranged concentrically about an axis and forms a pressure chamber in which an axially movable annular piston is arranged, and with a release bearing, the plant formed on a plate spring of the clutch and secured to the annular piston and the housing is supported via a cover bearing on a cover of the coupling, wherein the cover bearing has a fixed inner ring and a rotating outer ring with rolling elements arranged therebetween. From the European patent EP 1 961 985 B1 is a slave cylinder of a disengagement device for a vehicle clutch with a formed of at least one magnet and at least one sensor operatively connected thereto means for measuring distance and position of a piston known which mounted axially movable in a covered by a dirt sleeve cylindrical housing and surrounded by a retaining ring is, wherein the sensor is mounted on the housing and in each case one sensor is associated with a position attached to the retaining ring magnet position, wherein the magnet is disposed within the dirt sleeve on the retaining ring. From the German patent application DE 10 2009 016 292 A1 For example, there is known a clutch actuation system having a clutch actuation lever means coupleable or coupled to actuate a clutch means via a coupling means and a Belleville spring journal actuation device, the coupler comprising a coil spring means gimbaled to provide a ninety degree wobble balance allows offset to each other axial directions.

The object of the invention is to simplify the distance measurement when operating a clutch with at least one slave cylinder, in which a slave piston is moved back and forth, with which the clutch is actuated via an actuating bearing, and with a displacement measuring device to simplify.

The object is an operating system for a clutch, with at least one slave cylinder, in which a slave piston is arranged movable back and forth, with which the clutch is actuated via an actuating bearing, and with a displacement measuring device, achieved in that the actuating bearing a Taumelausgleichseinrichtung is associated with a relative to the slave cylinder movable sensor holder of Wegweginrichtung. As a result, a mechanical decoupling between the slave cylinder and the actuating bearing is made possible in a simple manner. The movable sensor holder makes it possible to compensate for adulteration during the distance measurement.

A preferred embodiment of the actuation system is characterized in that the wobble compensation device comprises a Halbkardanelement on which a target of the path measuring device is mounted. About the Halbkardanelement can be completely filtered by itself unwanted, but unavoidable tumbling movements. The Halbkardanelement is pivotable about a real axis. The target is, for example, a magnet if the displacement measuring device comprises a Hall sensor.

A further preferred embodiment of the actuating system is characterized in that the Halbkardanelement is pivotally coupled about a real axis with a coupling ring, which is associated with the actuating bearing. The coupling ring is advantageously arranged between the actuating bearing and the Halbkardanelement.

A further preferred exemplary embodiment of the actuation system is characterized in that the real axis runs perpendicular to a virtual axis which runs through the sensor element of the path-measuring device assigned to the target on the half-cardan element. As a result, dynamic storage of the target is made possible in a simple manner. Due to the dynamic mounting of the target, the intrinsically undesirable but unavoidable tumbling or wobble deflections are not detected, so that the measurement results of the displacement measuring device are not distorted.

A further preferred embodiment of the actuating system is characterized in that the sensor holder comprises a sensor retaining ring with two diametrically arranged guide rails which extend from the sensor retaining ring parallel to each other in the axial direction to the actuating bearing. Each guide rail is advantageously associated with a guide body which is provided on the coupling ring. The guide body are advantageously radially from the coupling ring. At the free ends, the guide body guide surfaces, with which the guide body are guided in the guide rails.

Another preferred embodiment of the actuation system is characterized in that the sensor retainer ring is pivotable about an x-axis and about a y-axis that is perpendicular to the x-axis. The x-axis substantially corresponds to the real axis about which the half-cardan element is pivotally coupled to the coupling ring.

A further preferred exemplary embodiment of the actuating system is characterized in that the sensor element of the displacement measuring device is mounted on the sensor retaining ring centrally between the guide rails. The sensor element is attached, for example, to a mounting arm that extends substantially parallel to the guide rails. The sensor element of the displacement measuring device is assigned to the target of the displacement measuring device.

A further preferred embodiment of the actuating system is characterized in that a biasing spring is clamped in the axial direction between the sensor retaining ring and the Halbkardanelement. By the biasing force of the biasing spring, which is also referred to as Vorlastfeder, the sensor retaining ring is held in the axial direction in contact with the slave cylinder or a slave cylinder housing. The combination of the sensor retaining ring with the Halbkardanelement and the coupling ring allows the desired balancing function of the Taumelausgleichseinrichtung. As a result, the sensor element can advantageously always be kept at a constant distance from an axis of symmetry of the actuating bearing.

The invention further relates to a method for actuating a clutch with at least one slave cylinder, in which a slave piston is arranged to move back and forth, which is coupled to an actuating bearing, with an actuating system described above.

The invention further relates to a wobble compensation device, a sensor holder, a path measuring device, a Halbkardanelement and / or a coupling ring for a previously described actuation system. The parts mentioned are separately tradable.

• 1 einen Nehmerzylinder mit einem Gehäuse, in dem ein Kolben hin und her bewegbar geführt ist, und mit einem Betätigungslager im Längsschnitt;
• 2 ein kartesisches Koordinatendiagramm, in welchem der Verlauf eines gemessenen Weges über der Zeit im Betrieb des Betätigungssystems aus 1 dargestellt ist;
• 3 eine ähnliche Darstellung wie in 1 mit einer vereinfacht dargestellten Taumelausgleichseinrichtung sowie mit zwei kartesischen Koordinatendiagrammen, in welchem Verläufe des gemessenen Weges an verschiedenen Messpunkten dargestellt ist; die
• 4A und 4B kinematische Darstellungen der Taumelausgleichseinrichtung aus 3 bei einer Auslenkung um eine y-Achse; die
• 5A und 5 B eine schematische Darstellung von Messstörungen bei einer Auslenkung um eine x-Achse;
• 6 vier kartesische Koordinatendiagramme, in welchen verschiedene Auslenkungen der Taumelausgleichseinrichtung über der Zeit aufgetragen sind;
• 7 eine perspektivische Darstellung eines Halbkardanelements; die
• 8A und 8B zwei perspektivische Darstellungen eines Kopplungsrings;
• 9 eine perspektivische Darstellung eines Sensorhalters;
• 10 einen Zusammenbau der in den 7 bis 9 dargestellten Teile mit einer Vorspannfeder zwischen dem Halbkardanelement und dem Sensorhalter; und
• 11 eine perspektivische Darstellung eines Betätigungssystems mit dem Zusammenbau aus 10 zwischen einem Betätigungslager und einem Nehmerzylinder.

Further advantages, features and details of the invention will become apparent from the following description in which, with reference to the drawings, various embodiments are described in detail. Show it:

• 1 a slave cylinder having a housing in which a piston is guided reciprocally movable, and with an actuating bearing in longitudinal section;
• 2 a Cartesian coordinate diagram in which the course of a measured path over time in the operation of the actuation system 1 is shown;
• 3 a similar representation as in 1 with a Taumelausgleichseinrichtung shown in simplified form and with two Cartesian coordinate diagrams, in which progressions of the measured path is shown at different measuring points; the
• 4A and 4B kinematic representations of Taumelausgleichseinrichtung from 3 at a deflection about a y-axis; the
• 5A and 5 B a schematic representation of measurement disturbances at a deflection about an x-axis;
• 6 four Cartesian coordinate diagrams in which different deflections of the wobble compensation device are plotted over time;
• 7 a perspective view of a Halbkardanelements; the
• 8A and 8B two perspective views of a coupling ring;
• 9 a perspective view of a sensor holder;
• 10 an assembly of the in the 7 to 9 shown parts with a biasing spring between the Halbkardanelement and the sensor holder; and
• 11 a perspective view of an actuating system with the assembly 10 between an actuating bearing and a slave cylinder.

In 1 is an actuation system 1 for a (not shown) coupling in longitudinal section. The actuation bearing 2 includes a bearing inner ring 3 and a bearing outer ring 4 , The bearing outer ring 4 is with the interposition of rolling elements 5 . 6 which are arranged in a cage, relative to the bearing inner ring 3 rotatable about a rotation axis. A receiving space for the rolling elements 5 . 6 between the bearing inner ring 3 and the bearing outer ring 4 is advantageously filled with lubricant. A sealing device prevents unwanted leakage of lubricant.

The actuation bearing 2 is in 1 at an upper end of a slave cylinder 10 arranged. The slave cylinder 10 includes a housing 15 with an inner cylinder 11 and an outer cylinder 12 , The inner cylinder 11 bounded radially inside a central through hole 19 for example, for performing a transmission shaft.

Between the inner cylinder 11 and the outer cylinder 12 is an annulus 14 educated. The housing 15 includes a ring body 16 through which the inner cylinder 11 integral with the outer cylinder 12 connected is.

The slave cylinder 10 further includes a slave piston 17 , The slave piston 17 , which is also abbreviated as piston, is with a U-ring seal 18 in the annulus 14 guided. The annulus 14 represents a hydraulic pressure chamber of the slave cylinder 10 out of his in 1 shown position is the slave piston 17 movable downwards.

The slave cylinder 10 further includes a preload spring 20 , which is designed as a helical compression spring. The preload spring 20 rests with a lower end turn 21 on the housing 15 the slave cylinder 10 from. The lower end turn 21 the preload spring 20 is a the actuation bearing 2 assigned to the opposite end of a dirt protection device, which serves as a bellows 26 is executed. An in 1 upper end turn 22 the preload spring 20 is an intermediate ring 24 assigned. The intermediate ring 24 is an in 1 Upper end of the bellows 26 executed pollution control device 25 assigned.

By a double arrow 27 is a way indicated to the slave piston 17 from his in 1 shown position can move down.

The slave cylinder 10 includes a longitudinal axis 28 , The longitudinal axis 28 the slave cylinder 10 corresponds to a rotation axis of a (in 1 not shown) transmission shaft extending through the central through hole 19 the slave cylinder 10 extends. In operation of the actuation system 1 It can happen that the actuation bearing 2 Performs tumbling movements in 1 through an angle 30 are indicated. An amount of wobble or the deflection of the actuator bearing 2 can be defined by a course of the angle 30 describe over time. The wobble of the actuator bearing 2 leads to a displacement measurement on the slave cylinder 10 to an undesirable adulteration.

In 2 is a Cartesian coordinate plot with an x-axis 31 and a y-axis 32 shown. On the x-axis 31 is a time in seconds. On the y-axis 32 is a measured way of the actuating bearing 2 applied in millimeters. Through a line 34 is shown a course of the measured path without wobbling. Through a bend 35 is a course of the measured path with a tumbling motion of the actuating bearing 2 shown. The deflection of the curve 35 illustrates the wobble of the actuator bearing over time.

In 3 is indicated as the unwanted deflection or wobble of the actuator bearing 2 by a wobble compensation device 40 can be prevented. By an arrow 33 a z-axis is indicated around which the actuating bearing 2 ideally should turn. By an arrow 36 is an undesirable deflection of the actuator bearing 2 by an amount minus R indicated. By an arrow 37 is a deflection of the actuator bearing 2 by an amount plus R indicated.

The wobble compensation device 40 includes an upper dash 38 and a bottom line 39 , The upper dash 38 makes the wobble of the actuation bearing 2 at one point A with, as in a Cartesian coordinate diagram through a curve 41 is indicated. The bottom line 39 is at a point B from the wobble of the actuator bearing 2 decoupled, as by a line 42 is indicated in an associated coordinate diagram. The wobble compensation device 40 is in the axial direction between the intermediate ring 24 and the actuation bearing 2 arranged. The wobble compensation device is fixed and loaded 40 advantageous alone only by the preload spring 20 ,

To determine the position of the coupling, with a sensor, the displacement along the axis 28 in 3 certainly. Ideally, should be on the axis 28 be measured. There, however, a direct measurement is not possible for design reasons. The unwanted, but usually unavoidable wobbling comes into play, because a target, for example a magnet, when a Hall sensor is used, off-axis 28 is arranged. The axis 28 is also called the symmetry axis of the actuator bearing 2 designated.

The amount of wobble or Taumelauslenkung can be described by an angle α, which is the angle 30 in 1 equivalent. When the wobble or Taumelauslenkung occurs, resulting in the displacement measurement, a falsification in 1 by a double arrow 29 is indicated. The adulteration is in 2 illustrated in a Cartesian coordinate diagram. Through the wobble compensation device 40 in 3 the adulteration can be advantageously minimized.

In the 4A . 4B and 5A . 5B is shown how to use the half-cardan Taumelausgleichseinrichtung 40 tries to access the axis or axis of symmetry 28 of the actuating bearing 2 to get. To this end must be an intersection of a real axis A and a virtual axis B the half-cardan wobble equalizer 40 coincide with the symmetry axis of the release bearing or actuator bearing.

In the 4 and 5 is through a rectangle 45 a target of a displacement measuring device 48 indicated. Through a rectangle 46 is a sensor element indicated, which is designed for example as a Hall sensor. Then the target 45 for example as a magnet.

In 5 is hinted that the wobble deflections thanks to a dynamic storage of the target 45 not completely recorded. The half-cardan wobble equalizer 40 allows for the target 45 three movements with respect to the actuation bearing. These three movements are a rotation about the y-axis, a displacement along the x-axis and a displacement along the z-axis in 4 , About the half-cardan wobble equalizer 40 the wobble deflections of these movements are above the lower level 39 completely filtered.

In 5 one sees that the remaining disturbances persist, as in 5A through different distances 51 and 52 between the sensor element 46 and the target 45 is indicated. To minimize the unwanted disturbances, it is advantageous to measure only at the point where the disturbances are smallest.

In 6 are gradients in four different Cartesian coordinate diagrams 61 to 64 a deflection in the x-direction or y-direction over time. The history 61 corresponds to a deflection in x (0) y (radius). The history 62 corresponds to a deflection in x (radius) y (0). The history 63 corresponds to a measurement at the point A in 4A , The history 64 corresponds to a measurement at the point B in 4B ,

In 7 is a half cardan element 70 shown in perspective. The half cardan element 70 comprises an annular body, of which two diametrically arranged guide body 71 . 72 protrude. At the free ends of the guide body 71 . 72 are guide surfaces formed. The guide body 71 . 72 with the guide surfaces allow pivoting of the Halbkardanelements 70 around the real axis A , The real axis A intersects with the virtual axis B , At one in 7 upper intersection of the virtual axis B with the annular body of Halbkardanelements 70 is on the ring body of Halbkardanelements 70 a fastening body with an attachment point 73 for the target 45 the path measuring device 48 educated.

In the 8A and 8B is a coupling ring 80 presented in different perspectives. The coupling ring 80 comprises a ring body, of which two guide lugs 81 . 82 protrude. The guide noses 81 . 82 are arranged diametrically. The guide noses 81 . 82 extend from the coupling ring 80 essentially radially outward. In addition, the coupling ring has 80 two diametrically arranged pivot receiving areas 83 . 84 on where the guide body 71 . 72 of the half cardan element 70 come to rest with their guide surfaces. The real axis A runs through both the guide lugs 81 . 82 as well as the pivot receiving areas 83 . 84 ,

In 9 is a sensor holder 90 shown in perspective. The sensor holder 90 includes a sensor retaining ring 93 of which two guide rails 91 . 92 out. The guide rails 91 . 92 extend parallel to each other in the axial direction. The guide rails 91 . 92 have mutually facing guides for the guide lugs 81 . 82 of the coupling ring 80 on. Through the guide rails 91 . 92 becomes a movement of the coupling ring 80 relative to the sensor holder 90 in the z direction. A z-axis is perpendicular to a plane that is in 9 is spanned by the x-axis and the y-axis.

In addition, the sensor holder points 90 in 9 at the top center between the guide rails 91 . 92 a fastening arm 95 on. The attachment arm 95 extends parallel to the guide rails 91 . 92 from the sensor retaining ring 93 in the axial direction. The attachment arm 95 has radially inside a mounting surface for the sensor element 46 on.

Central clutch actuation systems, also referred to as central clutch release, have a self-centering function. This means that during operation the axis or axis of symmetry 28 of the actuating bearing 2 from the piston axis of the slave piston 17 may differ. The deviation is, for example, one to two millimeters. For this reason, the sensor element becomes 46 in relation to the xy plane in 9 with the help of the coupling ring 80 stored freely. This will ensure that the sensor element 46 always at a constant distance to the axis or axis of symmetry 28 of the actuating bearing 2 stands.

In 10 is an assembly of the sensor holder 90 , the half-cardan element 70 and the coupling ring 80 with a preload spring or preload spring 100 shown in perspective. The preload spring or preload spring 100 is in the axial direction between the sensor retaining ring 93 and the half-cardan element 70 biased. The preload force of the preload spring or preload spring 100 is designed that the compensation function of Taumelausgleichseinrichtung 40 during operation of the actuation system.

In 11 is an actuation system 111 with the wobble compensation device 40 out 10 shown in perspective. The actuation bearing 2 is for example over the bearing outer ring 4 with the coupling ring 80 coupled with his guide noses 81 . 82 in the guide rails 91 . 92 of the sensor holder 90 is guided.

The half cardan element 70 is in the axial direction between the coupling ring 80 and the preload spring or biasing spring 100 arranged. The real axis is with A designated. The virtual axis is with B designated. By a double arrow 110 is a distance or way to the target 45 indicated.

LIST OF REFERENCE NUMBERS

1

actuating system

2

operation seat

3

Bearing inner ring

4

Bearing outer ring

5

rolling elements

6

rolling elements

10

slave cylinder

11

inner cylinder

12

outer cylinder

14

annulus

15

casing

16

ring body

17

slave piston

18

groove ring seal

19

central through hole

20

preload

21

lower end turn

22

upper end turn

24

intermediate ring

25

Dirt guard

26

bellow

27

double arrow

28

longitudinal axis

29

adulteration

30

Angle α

31

X axis

32

y-axis

33

arrow

34

line

35

Curve

36

arrow

37

arrow

38

stroke

39

stroke

40

Swash balancer

41

Curve

42

Curve

45

target

46

sensor element

48

displacement measuring system

51

double arrow

52

double arrow

61

course

62

course

63

course

64

course

70

Halbkardanelement

71

guide body

72

guide body

73

fastening point

80

coupling ring

81

guide nose

82

guide nose

83

Rotating seating area

84

Rotating seating area

90

sensor holder

91

guide rail

92

guide rail

93

Sensor retaining ring

95

Mounting Arm

100

biasing spring

110

double arrow

111

actuating system

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 102012222458 A1 [0002]
• EP 1961985 B1 [0002]
• DE 102009016292 A1 [0002]

Claims (10)

Actuation system (1, 111) for a clutch, comprising at least one slave cylinder (10) in which a slave piston (17) is arranged to be moved back and forth, with which the clutch is actuated via an actuating bearing (2), and with a displacement measuring device ( 48), characterized in that the actuating bearing (2) is associated with a Taumelausgleichseinrichtung (40) with a relative to the slave cylinder (10) movable sensor holder (90) of the displacement measuring device (48). Actuation system after Claim 1 , characterized in that the wobble compensation device (40) comprises a Halbkardanelement (70) on which a target (45) of the path measuring device (48) is mounted. Actuation system after Claim 2 characterized in that the half cardan element (70) is pivotally coupled about a real axis (A) to a coupling ring (80) associated with the actuation bearing (2). Actuation system after Claim 3 , characterized in that the real axis (A) perpendicular to a virtual axis (B), which extends through the the target (45) associated sensor element (46) of the path measuring device (48) on the Halbkardanelement (70). Actuating system according to one of the preceding claims, characterized in that the sensor holder (90) comprises a sensor retaining ring (93) with two diametrically arranged guide rails (91,92) extending from the sensor retaining ring (93) parallel to each other in the axial direction to the actuating bearing ( 2). Actuation system after Claim 5 characterized in that the sensor retaining ring (93) is pivotable about an x-axis and about a y-axis which is perpendicular to the x-axis. Actuation system after Claim 5 or 6 , characterized in that centrally between the guide rails (91,92), the sensor element (46) of the path measuring device (48) on the sensor retaining ring (93) is mounted. Actuation system according to one of Claims 5 to 7 , characterized in that a biasing spring (100) in the axial direction between the sensor retaining ring (93) and the Halbkardanelement (70) is clamped. Method for actuating a clutch having at least one slave cylinder (10) in which a slave piston (17) is arranged to be reciprocated, which is coupled to an actuating bearing (2), with an actuating system (1, 111) according to one of the preceding claims , Wobble compensation device (40), sensor holder (90), path measuring device (48), half - cardan element (70) and / or coupling ring (80) for an actuation system (1, 111) according to any one of Claims 1 to 8th ,

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