WO2017206975A1

WO2017206975A1 - Actuating device for a friction clutch and clutch system including same

Info

Publication number: WO2017206975A1
Application number: PCT/DE2017/100321
Authority: WO
Inventors: Loyal George Macmillian; Götz Rathke; Felix Bayer
Original assignee: Schaeffler Technologies AG & Co. KG
Priority date: 2016-05-31
Filing date: 2017-04-20
Publication date: 2017-12-07
Also published as: DE112017002701A5; DE102016209425B3; KR20190013776A; KR102499173B1

Abstract

The invention relates to an actuating device (1) for at least one friction clutch (200, 201) arranged about an axis of rotation (d) and comprising a sleeve (37, 38) which loads an actuating element of the at least one friction clutch (200, 201) along an actuation path, is arranged around the axis of rotation (d), and has an annular rim (35, 36), also comprising a lever actuator (3, 4) arranged substantially perpendicularly to the axis of rotation (d) having a lever (21, 22), which engages radially internally in a forked manner in the annular rim (35, 36) and is received radially externally in a resilient manner on a base plate (2), comprising a cross-member (15, 16), which is radially displaceable by means of an actuator (5, 6) and by means of a spindle drive (9, 10) and forms a mounting together with a radially displaceable lever point between the base plate (2) and the lever (21, 22), and comprising a clutch system including same. In order to modify an actuating device (1), in particular for more uniform actuation of the at least one friction clutch (200, 201), the at least one friction clutch (200, 201) is actuated for pulling, and the mounting of the lever (21, 22) is designed to be flexibly tilted relative to the base plate (2).

Description

Actuator for a friction clutch and Kupplunqssystem with this

The invention relates to an actuating device for at least one disposed about an axis of rotation friction clutch with an actuating element of the at least one friction clutch along an actuating travel loading, arranged around the axis of rotation sleeve with a ring board, a substantially perpendicular to the axis of rotation arranged lever actuator with a radially inwardly bifurcated engaging in the annular flange and radially outwardly resiliently received on a base lever, a radially displaceable by means of an actuator and a spindle drive, a bearing with radially displaceable fulcrum between the base plate and lever forming traverse and a coupling system with this.

Generic actuators serve to actuate frictional clutches about a rotational axis arranged to control the torque to be transmitted via the friction clutch. For this purpose, so-called lever actuators are known, for example from DE 10 2004 009 832 A1, which have a substantially perpendicularly arranged lever which displaces a sleeve arranged around the axis of rotation axially along an actuating path by means of its fork-shaped lever tips and thus an actuating element, for example a Disk spring or lever spring of a dry-operated friction clutch or an actuating piston of a wet-operated friction clutch operated. In this case, the actuating element forms a frictional engagement under the prestressing of friction surfaces of the friction clutch on the input side and on the output side, the preload being effected by an axial engagement taking place radially on the inside of the actuating element. controlled controlled and thus depending on the design of the friction clutch, the frictional engagement is formed or dissolved to form an intermittent slip phase.

The lever of the lever actuator is radially spaced from the lever tips with a base plate elastically connected. Between the lever and the base plate, a radially displaceable cross member is arranged, which rolls by means of rollers on rolling surfaces of the lever and the base plate and forms a fulcrum with respect to the lever. The lever tips of the lever are displaced by means of an actuator by the traverse is radially displaced by an actuator, such as an electric motor with spindle drive or a hydraulic cylinder. From DE 10 2008 026 944 A1 a structurally embodied embodiment of an actuating device with a lever actuator is known, by means of which a friction clutch is pressurized to actuate the lever via the sleeve, for example, is pressed or closed. From DE 10 2010 025 408 A1 also an actuator with a lever actuator is known, which acts on a train open in the unloaded state friction clutch train and thus attracts.

The object of the invention is the development of an actuating device for at least one friction clutch. In particular, the object of the invention to propose an actuating device for at least one friction clutch, which allows an improved operation of the at least one friction clutch. In addition, an object of the invention to provide a clutch system with at least one friction clutch with improved actuator.

The object is solved by the subject-matter of claims 1, 9 and 10. The dependent of the claim 1 claims give advantageous embodiments of the subject matter of claim 1 again. The proposed actuating device serves to actuate at least one friction clutch arranged about a rotation axis. The at least one friction clutch can be operated dry or wet. The at least one friction clutch may be pulled or pulled. The actuation of the at least one friction clutch takes place by means of an actuating element of the at least one friction clutch along an actuating path. In a dry-operated friction clutch, the actuating element may be formed as a plate spring, lever spring or the like. A wet-operated friction clutch may have a plurality of layers alternately layered on the input and output side rotationally fixed lamellae, which are clamped by the actuating element, such as a piston plate or the like against an end stop. In this case, the actuating element is each rotationally coupled axially loaded by a sleeve arranged around the axis of rotation with a ring board.

For actuation of the at least one friction clutch, the actuating device has a lever actuator arranged substantially perpendicularly to the axis of rotation and provided with a lever whose lever tips engage in the annular flange on the inside in the manner of a fork and which is received radially elastically on a base plate. For example, the elastic reception of the lever on the base plate by means of two perpendicular to the radial extent of the lever spaced spring elements such as helical compression springs or the like may be provided.

To form a radially displaceable lever point between lever tips and elastic reception of the lever on the base plate, a radially displaceable traverse is provided. The Traverse is effected by means of an attached to the base plate or otherwise stationary actuator. For example, the actuator can be used as romotor be formed with spindle drive, wherein from the rotor movement of the electric motor by means of the spindle drive a radial, the traverse displacing movement is generated. For example, a spindle nut can be incorporated or incorporated into the rotor of the electric motor, which is accommodated on a spindle thread of a rotatably and axially displaceably provided spindle, wherein the spindle is fixedly connected to the crossmember.

Due to the radial displacement of the traverse from radially outside to radially inside, the lever point of the lever changes. This results in a corresponding profiling of a bearing surface of the lever for the traverse and the arrangement of the spring elements between the lever and the base plate a pulling movement of the lever tips along the axis of rotation, which causes a depending on the formation of the friction clutch engagement or disengagement. In this case, profiling and spring elements can be coordinated with one another on the force relationships in the friction clutch such that an actuation of the friction clutch can take place essentially without force.

Due to manufacturing tolerances of the actuator and the friction clutch, axle offsets between the friction clutch driving crankshaft and the transmission input shaft of a subsequent transmission and / or the like can occur a misalignment of the lever relative to the friction clutch. As a result, for example, the lever tips of the lever can act unevenly on the ring flange of the sleeve. This unequal application can in turn lead to so-called NVH loads (noise, vibration, harshness). It is therefore proposed to make the storage of the lever with respect to the base plate kippweich. It has also been found to be advantageous, the friction clutch in conjunction with a tilt-soft mounting of the lever on the traverse on the Base plate as a drawn, preferably trained as closed, open in the load-free state friction clutch. Here, the lever pulls with its lever tips during the clutch actuation in an exact position with possibly not uniform arrangement of the sleeve. This makes it possible in particular to compensate for tolerance-related height differences in the lever tips.

The anti-tilt bearing, unlike two spaced-apart prior art rollers, may be formed by a single roller along a rolling surface on the base plate and on the lever. This means that one roll on the rolling surface of the lever and another single roll roll on the rolling surface of the base plate. The rollers are preferably arranged in the same plane, in particular to avoid tilting moments. The rollers may each be by means of an axis in the cross member, for example in a pocket of the cross member preferably rotatable on both sides, for example by means of rolling or sliding bearings. As far as a sufficient tiltability is maintained, can be understood by a single role and a pair of rollers with closely spaced roller halves. It has also proven to be advantageous to attach the rollers radially at the same height on the traverse.

According to an advantageous embodiment of the actuating device, the rolling surfaces can be arranged on the mutually facing surfaces of the base plate and the lever. This means that the rollers are axially spaced closely spaced on the cross member. Here, the base plate can be arranged axially between the at least one friction clutch and the lever.

In an alternative embodiment of the actuating device, the rolling surfaces can be arranged on the surfaces of the base plate and the lever facing away from one another. In this case, the traverse, the base plate and the lever to the corresponding chenden recesses such as radially extending longitudinal slots by cross-sections have, at which sections the only single role is added. In such embodiments, the lever may be disposed axially between the base plate and the at least one friction clutch.

The actuating device may comprise two lever actuators and corresponding sleeves such as actuating sleeves, wherein the lever actuators are arranged offset about the axis of rotation, the sleeves coaxially with each other with axially spaced annular rims and the levers are axially offset from each other formed with axially offset to the ring rims accessing lever tips. The lever actuators actuate one of two friction clutches of a double clutch, for example, for a dual-clutch transmission with coaxially arranged transmission input shafts. Alternatively, a dual clutch may be provided with a starting clutch and a power take-off clutch.

The base plate may be accommodated on the transmission housing of the transmission. Here, a subassembly of the actuator including the sleeve (s) may be attached to the transmission. Alternatively, the base plate can be arranged on the motor side or on a clutch bell. In particular, in a wet-operated friction clutch or a dual clutch with two wet-operated friction clutches, the actuator may be integrated in a friction clutch or dual clutch receiving gear housing with common oil chamber. In this case, the actuators can be flanged by corresponding openings on the outside of the transmission housing or be accommodated in the oil space.

The base plate may be formed as a cast, forged or sheet metal part.

The proposed clutch system includes at least one pull-actuated, preferably wet-operated, friction clutch and an actuating clutch actuated therewith. Device as proposed, wherein the at least one friction clutch and the actuating device form a structural unit. In this way, the coupling system, for example, before installation, in learning operations after final assembly, during maintenance or repair work and / or the like can be substantially independently tested, calibrated and / or parameterized. The data necessary for the operation of the coupling system, in particular calibration, parameterization data, fault memory entries and / or the like, can be stored in a suburb electronics of the actuator or the actuators and, for example, continuously adapted. Furthermore, when receiving the lever and the at least one friction clutch on the same base plate, the tolerance chain can be improved.

A preferred embodiment of the proposed clutch system includes two preferably wet-operated, designed as a double clutch friction clutches with an actuator as proposed. In this case, two lever actuators, each actuating a friction clutch, are arranged offset about the rotation axis by a predetermined offset angle between 90 ° and 120 °, in particular between 1 10 ° and 1 15 °. In this way, the actuator can space-saving in circumferential gaps between transmission eyes of transmission output shafts of a dual-clutch transmission and these are inserted axially overlapping.

The invention will be explained in more detail with reference to the Ausführungsbei- illustrated in the figures 1 to 4 games. Showing:

Figure 1 is a view of a transmission with an actuator with two

Lever actuators,

FIG. 2 shows a section through a coupling system with the actuating device of FIG. 1 along the section A-A of FIG. 1,

FIG. 3 is a view corresponding to the representation of FIG. over the actuating device of Figure 1 modified actuator

and

FIG. 4 shows a section of the actuating device of FIG. 3 along the section B-B corresponding to the representation of FIG.

Figures 1 and 2 show in view or in section the trained as a double clutch transmission 100 with the coaxial about the axis of rotation d arranged transmission input shafts 1 1 1, 1 12 with the actuator 1 (Figure 1) or a section through the actuator 1 for operating tion of two a double clutch forming, not shown in detail friction clutches 200, 201 (Figure 2). The actuating device 1 comprises the base plate 2, 2 ', wherein the upper part of Figure 2 shows a base plate 2 made of cast and the lower part of Figure 2 shows in an alternative a base plate 2' made of sheet metal. Subsequently, the base plates 2, 2 'uniformly and both base plates summarized as the base plate 2 described. On the base plate 2, two lever actuators 3, 4 to the offset angle α between 1 10 ° to 1 15 ° to each other and thus fitted into the space between the two Getriebeaugen 1 13, 1 14 of the transmission output shafts 1 15, 1 16 of the transmission 100 fitted.

The lever actuators 3, 4, each containing a recorded on the base plate 2 actuator 5, 6 with the electric motor 7, 8 and the spindle drive 9, 10. The rotor 1 1, 12 serves as a spindle nut of the spindle drive 9, 10, the spindle thirteenth , 14 is rotationally fixed and axially displaceable received in the electric motor 7, 8 and end connected to the traverse 15, 16. The traverse 15, 16 has rollers 17, 18, 19, 20, respectively. Each lever actuator 3, 4 has a lever 21, 22, which are elastically received on the base plate 2 radially outwardly by means of the spring elements 23, 24 which are formed here as a circumferentially beabstande- te helical compression springs 25, 26, elastically. The helical compression springs are accommodated in a pot 27, 28 connected to the base plate 2, the levers 21, 22 being clamped between the retainers 29, 30 connected to the base plate 2 and the helical compression springs 25, 26. Radially inwardly, the levers 21, 22 fork-shaped lever tips 31, 32 with spherical, facing away from the friction clutches 200, 201 Beaufschlagungsflächen 33, 34 which are applied to the ring board 35, 36 of the concentrically arranged about the axis of rotation d sleeves 37, 38 ,

The trusses 15, 16 each engage between the base plate 2 and the levers 21, 22 a. The rollers 17, 18 roll on rolling surfaces 39, 40 of the levers 21, 22 and the rollers 19, 20 on rolling surfaces 41, 42 of the base plate 2. The rolling surfaces 39, 40 have an axial profiling along its radial extent, for example, a force / Off- behavior to the actuation forces of the friction clutches 200, 201 adapt. The trusses 15, 16 with their rollers 17, 18, 19, 20 form a radially displaceable fulcrum between the levers 21, 22 and the base plate 2, so that at a radial displacement of each traverse 15, 16 of the lever 21, 22 to the Lever point tilts and the lever tips 31, 32 against the action of the spring elements 23, 24 at a displacement of the crossbar 15, 16 radially inward a pulling movement on the respective sleeve 37, 38 and 38 depending on the design of the friction clutch 200, 201 as drawn or wound Friction clutch closes or opens this. In the case of a radial rearward displacement of the traverse 15, 16, the friction clutch 200, 201 is preferably forcibly reopened or closed in the reverse manner. Depending on the position of the traverse 15, 16 can be slipping states the friction clutch 200, 201 defined to be kept or adjusted.

As a result of the formation of only a single roller 17, 18 rolling on a single rolling surface 39, 40 of a lever 21, 22 and a single roller 19, 20 rolling on a single rolling surface 41, 42 of the base plate 2, it is possible the lever tips 31, 32 of a lever 21, 22 can apply uniformly to the ring board 35, 36. It is understood that the rollers 17, 18, 19, 20 may be formed of multi-part roller elements, for example, as axially juxtaposed roller elements which roll on a single rolling surface. Here, due to the tolerances of the components, such as the lever tips 31, 32, the lever 21, 22, an axial offset between the crankshaft of an internal combustion engine and transmission input shafts 1 1 1, 1 12 and the like tilting of the levers 21, 22 may be provided about its radial longitudinal axis in that, for example, the two spaced-apart spring elements 23, 24 are subjected to different degrees of force. In this way, a one-sided loading of the annular ribs 35, 36 and subsequently the sleeves 37, 38 and actuators of the friction clutches 200, 201 can be avoided or at least reduced.

Figures 3 and 4 show in the illustration of Figures 1 and 2, a relation to the actuator 1 modified embodiment of the actuator 1 a. In contrast to the actuating device 1, in which the two rolling surfaces 39, 41 and 40, 42 of the base plate 2 and the lever 21, 22 are formed facing each other, the rolling surfaces 39a, 41a and 40a, 42a of the base plate 2a and the lever 21 a, 22 a arranged on the opposite sides of the base plate 2 a and the levers 21 a, 22 a. The traverse 15a, 16a remains between the lever 21a, 22a and the base plate 2a and each has axially extended portions 43a, 44a, on the corresponding longitudinal slots 45a, 46a, 47a in the base plate 2a and in the lever 21 a, 22 a pass through and on both sides of the rollers 17 a, 18 a, 19 a forming roller elements 48 a, 49 a, 50 a form.

List of Reference Actuator

a actuator

baseplate

'Base plate

a base plate

Hebelaktor

actuator

electric motor

spindle drive

0 spindle drive

1 rotor

2 rotor

3 spindle

4 spindle

5 traverse

5a Traverse

6 traverse

6a traverse

7 roll

7a roll

8 roll

8a roll

9 roll

9a roll

0 roll

1 lever

1 a lever

2 levers

2a lever spring element

spring element

Helical compression spring helical compression spring pot

pot

restrainer

lever tip

Loading area Ringbord

ring board

shell

rolling surface

a rolling surface

rolling surface

a rolling surface

rolling surface

a rolling surface

rolling surface

a rolling surface

a section

a Längsschlitza Längsschlitza Längsschlitza Rollenelementa Rollenelementa roller element

0 gearbox

1 transmission input shaft 1 12 transmission input shaft

1 13 geared eye

4 geared eye

1 15 Transmission output shaft

1 16 Transmission output shaft

200 friction clutch

201 friction clutch d rotation axis

α offset angle

Claims

Patent claims

1 . Actuating device (1, 1 a) for at least one friction clutch (200, 201) arranged around an axis of rotation (d) with a sleeve (200, 201) which loads an actuating element of the at least one friction clutch (200, 201) along an actuation path and is arranged around the axis of rotation (d). 37, 38) with an annular rim (35, 36), a lever actuator (3, 4) arranged essentially perpendicular to the axis of rotation (d) with a forked radially on the inside of the annular rim (35, 36) and elastically on the outside on a base plate (2, 2a, 2') accommodated lever (21, 21a, 22, 22a), a radially displaceable by means of an actuator (5, 6) and a spindle drive (9, 10), a bearing with a radially displaceable lever point between the base plate ( 2, 2a, 2') and lever (21, 21a, 22, 22a) forming traverse (15, 15a, 16, 16a), characterized in that the at least one friction clutch is operated pulled and the bearing of the lever (21, 21a, 22, 22a) is designed to be tilt-soft relative to the base plate (2, 2a, 2').

2. Actuating device (1, 1 a) according to claim 1, characterized in that the tilt-soft storage is carried out by means of a single roller (17, 17a, 18, 18a, 19, 19a, 20) along a rolling surface (39, 39a, 40, 40a, 41, 41a, 42, 42a) is formed on the base plate (2, 2a, 2') and on the lever (21, 21a, 22, 22a).

3. Actuating device (1) according to claim 2, characterized in that the rolling surfaces (39, 40, 41, 42) are arranged on the mutually facing surfaces of the base plate (2, 2 ') and the lever (21, 22).

4. Actuating device (1) according to claim 3, characterized in that the base plate (2, 2 ') is arranged axially between the at least one friction clutch (200, 201) and the lever (21, 22).

5. Actuating device (1a) according to claim 2, characterized in that the rolling surfaces (39a, 40a, 41a, 42a) are arranged on the surfaces of the base plate (2a) and the lever (21a, 22a) facing away from one another.

6. Actuating device (1a) according to claim 4, characterized in that the crossmember (15a, 16a) connects the base plate (2a) and the lever (21a, 22a). speaking longitudinal slots (45a, 46a, 47a) of the base plate (2a) and the lever (21a, 22a) have sections (43a, 44a), on which sections (43a, 44a) the single roller (17a, 18a, 19a). ) is included.

7. Actuating device (1a) according to claim 5 or 6, characterized in that the lever (21a, 22a) is arranged axially between the base plate (2a) and the at least one friction clutch (200, 201).

8. Actuating device (1, 1 a) according to one of claims 1 to 7, characterized in that the base plate (2, 2a, 2 ') is designed as a cast, forged or sheet metal part.

9. Clutch system with at least one pulled-operated, preferably wet-operated friction clutch (200, 201) and an actuating device (1, 1 a) that operates it according to one of claims 1 to 7, wherein the at least one friction clutch (200, 201) and the actuating device (1, 1 a) form a structural unit.

10. Clutch system with two preferably wet-operated friction clutches (200, 201) designed as a double clutch with an actuating device (1, 1 a) according to one of claims 1 to 8, wherein two lever actuators (3) each actuating a friction clutch (200, 201). 4) are arranged offset about a rotation axis (d) by a predetermined offset angle (a) between 90 ° and 120 °.