WO2003071149A2

WO2003071149A2 - Electromotive clutch release device for a gear-shift clutch

Info

Publication number: WO2003071149A2
Application number: PCT/EP2003/001166
Authority: WO
Inventors: Ludwig Winkelmann; Bernhard KLÖPFER; Steffen Dittmer
Original assignee: Ina-Schaeffler Kg
Priority date: 2002-02-23
Filing date: 2003-02-06
Publication date: 2003-08-28
Also published as: BR0303317A; AU2003205739A1; WO2003071149A3; DE10222719A1

Abstract

The invention relates to a clutch release device (1a) which is placed between a gear box (2) and a gear-shift clutch (3). The arrangement comprises a rotationally symmetrical electric motor (5a) which is combined with a clutch release bearing (6a) and a regulating device (7) in the form of a threaded drive in order to form a structural unit (4a).

Description

Name of the invention

Electromotive disengaging device for a shift clutch

description

Field of the Invention

The invention relates to an electromotive disengaging device for a shift clutch that is inserted between a manual transmission and the shift clutch of an internal combustion engine. The design of the disengaging device comprises an axially displaceable disengaging bearing, which cooperates with a clutch spring of the shift disconnect clutch and which surrounds a drive shaft connecting the shift transmission to the internal combustion engine. The release bearing arranged on a carrier part is actuated by means of an electric motor.

Background of the Invention

Such a disengaging device is known from DE 41 40 122 A1. This device comprises an electric motor which is arranged axially parallel to a clutch axis and which drives the screw spindle of a spindle gear via a continuously adjustable gear in connection with a further spur gear. A spindle nut, which interacts with the screw spindle and is supported on a housing part with respect to rotational movements, carries a pressure ring on a roller bearing which which acts in such a way that the clutch is released in one direction when the spindle gear is moved and engages again in a countermovement.

DE 35 18 868 A1 describes an electromotive actuation of a shift disconnect clutch in which an electric motor mounted in a housing is connected to a clutch actuation shaft likewise mounted in this housing. The actuating shaft is connected to a release lever, the sector of which is toothed at the end is connected to a toothed wheel and to a worm which is integrally associated with the electric motor. A spring also acts on the release lever, which is pivoted out of a dead center position when the release lever is moved and thus supports further actuation.

The disengaging device DE 44 43 649 A1 shows a further electromotive disengaging device. The housing of the release bearing has a partial toothing, the length of which is adapted to the maximum axial travel of the release bearing. A worm attached to a shaft of the electric motor engages directly in the toothing.

These known solutions require specially designed release bearings and an enlarged installation space, in particular in the devices in which a spindle or a spur gear is arranged between the electric motor and the release bearing.

Summary of the invention

The present invention is based on the object of providing an electromotive disengaging device which is optimized for installation space and which guarantees optimized shifting comfort in conjunction with high operational reliability. Another object is to implement an easy-to-assemble, inexpensive electromotive release device that is suitable for large-scale production. To solve this problem, an electric motor is provided according to claim 1 which, together with a release bearing and an actuating device, forms a structural unit which is at least partially integrated in a housing and connected to the disconnect clutch. This structure enables the electromotive release device to be installed in an existing clutch housing of an internal combustion engine and therefore does not require a specially designed housing. The disengaging device according to the invention only requires an adaptation of the disconnect clutch to the electromotive disengaging device or its structural unit. Furthermore, the invention simplifies assembly, since all components of the structural unit are integrated in the housing or are connected to the housing. For this purpose, the structural unit can advantageously be completed as a supply part as a preassembled unit with the switching disconnect clutch.

The solution according to claim 2 provides that a component of the electric motor, the rotor or the stator with the release bearing and an actuating device forms a structural unit, the components being at least partially integrated in a housing and the structural unit being connected to the switching disconnect clutch and rotating with it , The other component of the electric motor, the rotor or the stator, on the other hand, is non-rotatably, preferably connected to the gear housing.

The invention according to claim 35 provides an electromotive disengaging device, the electric motor of which is arranged in a rotationally rigid manner separately from the actuating device. For this purpose, the electric motor is preferably connected to the actuating device via a screw drive. To this end, the invention provides for the electric motor to be arranged in a rotationally rigid manner on the clutch housing or the transmission housing. The worm drive further enables the arrangement of an electric motor which is fastened outside the clutch housing and is, for example, flanged to the outside of the clutch housing and connected to the actuating device via a shaft. The invention according to claim 36 relates to the rolling bearing of the actuating device. This comprises rolling elements designed as rollers, which have circumferential, pitchless grooves. In the installed position, the circumferential grooves in the rolling elements are guided in corresponding grooves in the associated components of the rolling bearing. Such a roller bearing decisively improves the forces that can be transmitted in the axial direction due to the enlarged contact surfaces and the outer grooves arranged in the axial direction, which engage in the associated grooves of the bearing rings.

It is common to all inventions that the entire electromotive disengaging device concentrically surrounds the drive shaft, which connects the internal combustion engine or the shifting clutch to the gearbox. Activation of the electric motor causes an axial displacement of the actuating device, which enables the release bearing to be disengaged or engaged.

The inventions are further characterized by a compact design of the entire electromotive disengaging device, which can preferably be preassembled and centrally attached to the switching disconnect clutch with little effort.

Furthermore, all solutions include a release bearing, the inner ring and outer ring of which rotates with the disconnect clutch. Only when actuated, i.e. H. in the case of an axial adjustment by means of the actuating device driven by the electric motor, there follows a relative movement between the bearing rings of the release bearing. Due to the low relative speeds between the bearing rings, which occur only when the device is actuated, release bearings with a lower quality level can be used, which are manufactured with less accuracy, combined with a cost advantage.

Advantageously, the inventions enable a compact electromotive disengaging device that is optimized in terms of installation space both in the radial and in the axial direction. The structure according to the invention is also distinguished characterized by high rigidity. The device consists of simply constructed, inexpensive to manufacture components that ensure a robust, play-free design.

Further advantageous embodiments of the invention are the subject of dependent claims 3 to 34 and 37 to 43.

As a preferred embodiment of the invention, it is provided to provide the electromotive disengaging device with a rotationally symmetrical electric motor, in which the rotor as well as the stator are designed so as to be cylindrical so that one component coaxially encloses the other component. This design of an electric motor favors a compact design, especially in the radial direction. Furthermore, the cylindrical design simplifies assembly and favors the manufacturing costs of these components.

An alternative construction of an electric motor for an electromotive disengaging device according to the invention provides for only the rotor with the disengaging bearing to be designed to rotate. The rotor is in operative connection with the stator, which is fixed in terms of rotation, preferably attached to the gear housing, the stator preferably coaxially enclosing the rotor.

Another advantageous embodiment of the invention provides that the components integrated in a housing or connected to a housing to form a structural unit, the release bearing, the electric motor and the actuating device are further combined with a carrier part on which the clutch spring of the shifting clutch is connected is non-positively supported. In an advantageous manner, the carrier part encloses the adjusting device designed as a threaded drive on the inside and extends axially over the entire width of the electromotive disengaging device.

According to the invention, an end cover of the shifting clutch is used to receive the electromotive release device according to the invention. in one piece with an axially projecting cylindrical extension, which is directly connected to the electromotive release device. In this case, the U-shaped housing is aligned in the installed position so that its legs run horizontally and are radially spaced from the shoulder which is integrally connected to the cover of the shifting clutch. The legs form on the inside and outside of the attachment annular receptacles or installation spaces, which are intended on the one hand for the electric motor and on the other hand for the release bearing.

An advantageous construction of the electromotive disengaging device comprises a rotor of the electric motor, which is fastened directly to the radially outer leg of the housing and the associated stator encloses the axially protruding shoulder of the cover of the shifting clutch on the outside. Such an electric motor arrangement is preferably provided with an electrical sliding contact, which has a cable connection to which, for example, an electrical cable which is arranged in a stationary manner on the coupling housing or the transmission housing is connected.

The adjusting device, which is preferably designed as a screw drive, is used according to the invention in the annular installation space which is delimited radially on the inside by the support part designed as a cylindrical bushing and radially on the outside by the inner leg of the housing. A roller screw drive is preferably provided as the screw drive, with cylindrically designed rollers arranged symmetrically around the circumference, which positively engage in an internal thread of the outer housing leg and in an external thread of the carrier part.

The structure of the roller screw further provides that their rollers are guided in a cage which is supported at least on one end face on an end ring or a limiting collar. The internal thread intended for the rollers is preferably provided on the leg of the housing with recesses running in the longitudinal direction. The recesses in connection with end-face return contours of the end ring or the At a defined end position of the release bearing, the tongue collar enables the rollers to be automatically returned in a manner customary for roller screw drives. This return device ensures that the rollers remain in the same working area and thus there is no shifting of the support area.

A small thread pitch is advantageously provided for the roller screw drive in order to improve the positioning accuracy, to ensure a minimum input torque and a high degree of efficiency. Due to the large load-bearing contact surfaces, the lead screw has an improved rigidity and load-bearing capacity, which has a positive effect on the service life.

As an alternative to a roller screw drive with a feedback device, the electromotive disengaging device according to the invention includes, as a cost-reducing measure, a roller screw drive without returning the rollers.

In order to optimize the freedom from play and the friction, it is provided according to the invention that at least one groove flank of the thread roll, the internal thread on the housing leg or the external thread of the carrier part has a targeted crowning so that defined, specific contact conditions or contact points of all to achieve components related to the thread.

Alternatively, in order to achieve a play-free adjusting device, the invention comprises a thread in which the grooves are designed differently to a thread pitch of the internal thread on the housing leg or of the external thread on the carrier part.

As an alternative to the roller screw drive explained, the electromotive disengaging device according to the invention can be combined with other suitable actuating devices which carry out a linear movement, for example a movement screw drive, in particular a ball screw drive. The design of the carrier part comprises, on the side facing the shifting clutch, a preferably circumferential rim, which is oriented at right angles to a longitudinal center axis of the shifting clutch and on which the clutch spring or the clutch springs are non-positively supported.

In order to achieve a position-oriented support of the clutch springs on the carrier part, the board is provided with guide lugs which at the same time prevent disadvantageous slipping or relative rotation between the clutch springs and the carrier part. As an alternative to guide lugs, the invention includes coupling springs which, for example, have protruding knobs or lugs which engage in a form-fitting manner in recesses in the carrier part board.

The electromotive disengaging device according to the invention can be used for all types of known disconnect clutches. This includes, in addition to a single-disc shift clutch, for example a shift clutch constructed as a double clutch or a shift clutch that forms a unit with a dual-mass flywheel.

A roller bearing designed as an inclined shoulder bearing is preferably provided as the release bearing. A roller bearing constructed as a deep groove ball bearing or double row angular contact ball bearing is particularly suitable for this purpose. In addition, the invention includes a roller bearing, the end faces of which are chamfered and cooperate with a shoulder of the associated bearing ring in order to transmit any axial forces that occur. A crossed roller bearing or a grooved roller bearing can also be used.

As a measure to reduce the component size of the electromotive disengaging device according to the invention, it is also appropriate to arrange the rolling elements of the disengaging bearing directly between components of the electromotive disengaging device according to the invention. For this purpose, it is advisable that the rolling elements on the outside on the cylindrical shoulder of the Switching clutch cover and inside are guided on the inner leg of the U-shaped housing. The approach of the cover or the housing legs, which also take on the function of a bearing ring, are provided with appropriately designed rolling element raceways. Furthermore, a release bearing can be used, the rolling elements of which are guided on the one hand on a separate bearing ring and on the other hand on a component of the release device designed as a multi-functional part.

The release bearing is preferably used preloaded to avoid disadvantageous slippage between the individual components of the rolling bearing. Suitable for this purpose is, for example, an elastic sleeve that is inserted into an annular gap between a bearing ring and the associated contact part, or an elastic disk that acts on the end face of at least one bearing ring of the rolling bearing in the form of a spring means. Alternatively, a flare sleeve with or without a spring element can be used, which on the inside encloses the two-part inner ring of the roller bearing and whose end flanges are preferably supported under prestress on the end faces of the inner roller bearing ring.

Another advantageous embodiment of the electromotive disengaging device provides for the electric motor to be arranged radially to the longitudinal central axis of the disengaging device. This measure enables an optimally small axial distance between the likewise radially arranged rotor and the stator. The stator is preferably non-rotatable, for example attached to the gear housing, and the rotor is connected to the actuating device.

Furthermore, it is advisable to arrange the release device or to switch it electrically so that the electromotive drive acts as an electric brake. A braking torque initiated thereby enables the actuating device to disengage. In contrast, immediately after the electric brake is released, the engagement process of the actuating device is set automatically. In order to improve the service life and to reduce the friction, the invention further includes an adjusting device in which the components that are in sliding or positive engagement are coated. A DLC (diamond like carbon) coating is actually preferred.

As a measure to reduce the friction or to reduce the noise, a contact area or contact point between the coupling spring, which is preferably designed as a plate spring, and the rim of the carrier part is coated. A Teflon or TN coating is particularly suitable for this.

In addition to the coatings mentioned above, the invention also includes all other commercially available coatings which are suitable for increasing the service life of the individual components, reducing the friction and, at the same time, reducing noise.

The electromotive disengaging device can also be equipped with sensors or cooperate with sensors which are designed in particular as displacement and / or force sensors. The engagement and disengagement can thus be controlled according to the desired operating conditions, for example via control electronics or engine management. Furthermore, the state of wear of a drive plate of the shift clutch and / or the release bearing can be determined, for example, and the function of the release device can be monitored in general.

In an embodiment of the invention according to claim 35, the worm drive comprises a worm that connects the electric motor to the actuating device. The screw engages positively in a screw profile of the housing connected to the actuating device. For this purpose, the housing is at least partially provided with a right-angled annular leg, in the lateral surface of which the screw profile is molded. This construction of the worm drive enables the electric motor to be arranged in a position-independent manner by the actuating device. This means that the electric motor can both half as well as outside of the clutch housing, taking into account the respective installation conditions.

The construction of the worm drive comprises a torsionally rigid, axially displaceable carrier part, to which the housing provided on the outside with a worm profile is arranged to be relatively rotatable. According to the invention, the carrier part is provided at the end with a release bearing on the side facing the switching disconnect clutch. For this purpose, the end of the carrier part is preferably provided with an inner bearing ring, for receiving in particular spherical rolling elements. The further bearing ring, which is designed as an outer ring, is provided with a radially outwardly directed, circumferential rim, on which the clutch spring of the shifting clutch is non-positively supported. It is preferable to form the raceway of the rolling elements into the end section of the carrier part without cutting in order to form the inner ring.

The electromotive disengaging device provided with a worm gear requires a non-rotating arrangement of the carrier part due to its function. For this purpose, for example, a radially inwardly directed extension of the carrier part is suitable, which in the installed state engages in a longitudinal groove of a leg connected to the coupling housing. Alternatively, a leg connected to the gear housing can be provided, in the longitudinal groove of which the shoulder of the carrier part engages in a form-fitting manner.

An embodiment of the invention according to claim 36 provides that the actuating device has two roller bearings arranged coaxially to one another. The release bearing coaxially encloses a roller bearing of the actuating device, which is preferably designed as a roller screw drive. Correspondingly, both rolling bearings have cylindrical rolling elements, on the circumferential surfaces of which circumferential pitch-free grooves are arranged, which in the installed state engage positively in corresponding grooves of the associated components or bearing rings. The bearing rings of the release bearing also have pitch-free grooves. The bearing rings of the roller screw are different provided with grooves which have a pitch or a thread, in order to achieve an axial actuating movement between the carrier part and the housing of the actuating device.

In order to improve the service life and to reduce the friction, the invention further includes an adjusting device in which the components that are in sliding or positive engagement are coated. Hard material coatings such as, for. B. a DLC (diamond like carbon) coating or also: WC: H; stainless; a-C: H-a; TaCh, which are produced in the PVD or PACVD process or applied to the corresponding sliding or friction surfaces.

As a friction or noise-reducing measure, the invention further includes coating contact areas or contact surfaces between the clutch spring of the shift isolating clutch, which is preferably designed as a plate spring, and the associated support surface on the carrier part or the outer ring of the release bearing. A Teflon or TN coating is particularly suitable for this.

In addition to the above-mentioned coatings and surface treatments, the invention includes all other commercially available coatings which are suitable for increasing the service life of the individual components, reducing the friction and furthermore reducing noise.

Brief description of the drawings

Further features and advantages of the invention result from the following description of figures relating to different exemplary embodiments. Show it:

Figure 1 shows an electromotive release device according to the invention in an installed position; Figure 2 shows the electromotive disengaging device with a

Deep groove ball bearing designed release bearing;

FIG. 3 shows an electric motor aligned radially to a longitudinal central axis of the disengaging device;

FIG. 4 shows a further electromotive release device with a release bearing designed as a roller bearing;

FIG. 5 shows an ^“ electromotive release device, in which the bearing rings of the release bearing are formed by components of the release device;

FIG. 6 shows the structure of the adjusting device designed as a screw drive;

FIG. 7 shows a half-section of an electromotive release device according to the invention in the installed state;

Figure 8 is an alternative to Figure 7 constructed electric motor

Disengaging device in which individual components of the disengaging - • ^• device perform a double function;

9 shows a disengaging device according to the invention, in which see between the actuating device and the electric motor

Worm drive is provided.

Detailed description of the drawings

The electromotive disengaging device 1a to 1d shown in FIGS. 1 to 4 is inserted axially between a manual transmission 2 and a shift clutch 3, the shift clutch 3 being assigned to an internal combustion engine not shown in FIGS. 1 to 4. The electromotive _. Release device 1 a according to FIG. 1 forms a structural unit 4a, which comprises an electric motor 5a, a release bearing 6a and an actuating device 7, which are integrated in a housing 8 or connected to it. The assembly 4a encloses a drive shaft 9, which connects the gearbox 2 with the shifting clutch 3 at a radial distance. On the inside, the assembly 4a has a carrier part 10 which extends axially over the entire width of the actuating device 7 and which on the side facing the shifting clutch 3 has a radial one outwards at right angles to a longitudinal center axis 47 of the disengaging device 1 a, preferably rotating rim 11. A clutch spring 12 of the shifting clutch 3 is non-positively supported on the board 11, the board 11 having axially projecting guide lugs 13 on which the clutch spring 12 is fixed in position to create a slip-free system. The adjusting device 7, designed as a screw drive, is arranged in an annular installation space 14, which is delimited radially on the inside by the carrier part 10 and radially on the outside by a leg 15 of the U-shaped housing 8. In this case, the roller screw drive comprises a plurality of rollers 17 which are distributed around the circumference and which positively engage in an external thread of the carrier part 10 and an internal thread of the leg 15. An end ring 18 is also assigned to the rollers 17, the function and structure of which is explained in the description of FIG.

The disengaging device 1 a is fastened to a cover 20 of the disconnect clutch 3 and thus follows the rotational movement of the disconnect clutch 3. For this purpose, the cover 20 is provided in one piece with an axially projecting cylindrical extension 21 which engages in the housing 8. A second annular installation space 19 intended for the release bearing 6a is delimited radially on the inside by the leg 15 of the housing 8 and radially on the outside by the shoulder 31 of the cover 20. The release bearing 6a, which is directly connected to the cover 20 of the disconnect clutch 3 and can be referred to as a cover bearing, is designed as a double row angular contact ball bearing. The one-piece outer ring 22 of the release bearing 6a is preferred over one partially arranged, engaging in a groove 24 of the shoulder 31 collar 23, rotationally fixed. The two-part inner ring 25 of the release bearing 6a is positioned on both sides by means of snap rings 26a, 26b inserted in ring grooves of the leg 15.

As a measure to ensure a constant rotation of the rolling elements 27 of the release bearing 6a, a spring washer 28 is inserted between an end face of the inner ring 25 and the snap ring 26a. Alternatively or additionally, there is also a flared bushing, which is arranged in an annular gap between the inner ring 25 of the release bearing 6a and the leg 16 of the housing 8. Furthermore, a crimping sleeve 29 can be used instead of the spring bushing to achieve a pre-complete release bearing 6a. The flare sleeve 29 surrounds the divided inner ring 25 on the inside, with end flanges of the flare sleeve 29 being supported on the face side of the inner ring 25 on both sides.

In order to achieve a relative rotation between the shifting clutch 3 and the housing 8, in order to achieve an axial movement of the disengaging device 1a indicated by the double arrow, an electric motor 5a is provided for driving the actuating device 7. The rotationally symmetrical components of the electric motor 5a are arranged in the circular installation space 30 delimited on the outside by the outer leg 31 of the housing 8 and on the inside by the extension 21 of the cover 20. In this case, the stator 32a of the electric motor 5a is rotationally fixed to the extension 21 and is therefore connected to the shifting clutch 3. The rotor 33a coaxially enclosing the stator 32a is fastened to the outer leg 31. The electric motor 5a has a sliding contact 34, to which an electric cable 35 is connected, which is guided through an opening 37 of the clutch housing 36 enclosing the disconnect clutch 3.

The disengaging device 1b shown in FIG. 2 shows an electric motor 5b constructed differently from FIG. The rotor 33b is fastened directly on the outer leg 31 of the housing 8 and stands with the stator 32 in operative connection, which is rotationally fixed to the gearbox 2 via a holder 49. The electric motor 5b does not require a sliding contact, but rather enables the electrical cable 35 to be connected directly to the stator 32b. Furthermore, the disengaging device 1b is provided with a disengaging bearing 6b designed as a single-row deep groove ball bearing or four-point bearing. The disengaging device 1b also comprises at least one sensor 48 for monitoring the function of the disengaging device 1b, with which the adjustment path can be determined, for example.

FIG. 3 shows the disengaging device 1c, in which, in contrast to the disengaging device 1b according to FIG. 2, the electric motor 5c is arranged radially to the longitudinal central axis 47 of the disengaging device 1c. The rotor 33c and the stator 32c are arranged unaffected by radial shocks caused by production with a small axial gap to one another. This measure improves the efficiency of the electric motor 5c.

FIG. 4 shows the release device 1d, which, apart from the release bearing 6b, corresponds to the release device 1a shown in FIG. 1. The release bearing 6b, which can also be referred to as a cover bearing, comprises rolling elements 38 which are designed as rollers and whose outer surface is provided with grooves. The cylindrical area, the outer surface of the rolling elements 38 is provided with grooves 39a, the pitch of which corresponds to the corresponding grooves 39b of the outer ring 22 or to grooves 39c of the leg 15. A form-fitting interlocking groove profile is formed for load transfer or guidance. The rolling elements 38 designed as rollers are held at a distance in the circumferential direction in the cage 40.

FIG. 5 shows a component-optimized disengagement device 1d. The rolling elements 38 are guided on both sides without separate bearing rings directly to components of the disengaging device 1d, which thus perform a double function. The roller bodies 38 designed as rollers with grooves are guided on the inside on the leg 15 of the housing 8 in accordance with FIG. 4. Outside- on the side, the projection 21 of the cover 20 of the disconnect clutch 3 forms the further running surface for the rolling elements 38.

The structure of the actuating device 7, which is designed as a roller screw drive, is shown in an exploded view in FIG. 6. In the cage 16, rollers 17 are guided in symmetrically circumferentially distributed longitudinal slots 41, which have grooves along the entire length at a distance from the thread pitch. In the installed position, the rollers 17 engage on the outside in an internal thread 42 of the leg 15 of the U-shaped housing 8 and on the inside in a thread 43 which is arranged on the lateral surface 44 of the carrier part 10. The cage 16 is supported on an end ring 18 at least on one end face. On the cage side, the end ring 18 has a roller return contour 45 which, in conjunction with recesses 46 in the internal thread 42 of the leg 15, ensures a return of the rollers 17, in accordance with known roller screw drives. As a measure for realizing a control device 7 that is as free of play as possible, a different pitch of the groove flanks in comparison to the internal thread 42 or the thread 43 can be provided, for example, in a length-limited section of the thread roller 17.

In the drawings 7 to 9 electromotive disengagement devices 1f, 1g, 1 h are shown, which is inserted axially between a manual transmission 2 and a shift clutch 3, the shift clutch 3 being assigned to an internal combustion engine not shown in FIGS. 1 to 3.

The electromotive disengaging device 1f according to FIG. 7 forms a structural unit 4f which comprises an electric motor 5f which is integrated in a housing 8 or connected to it. The assembly 4f encloses, radially spaced apart, a drive shaft 9 connecting the gearbox 2 to the shifting clutch 3. On the inside, the assembly 4f has a carrier part 10 which extends axially over the entire width of the actuating device 7 and which is directed toward the shifting clutch 3 Side has a circumferential rim 11 oriented radially outward at right angles to a longitudinal central axis 47 of the disengaging device 1f. Force is supported on the board 11 conclusively from a clutch spring 12 of the disconnect clutch 3, the board 11 having axially projecting guide lugs 13 on which the clutch spring 12 is rotationally fixed to create a slip-free system or to prevent rotation. The actuating device 7, which includes a roller screw drive 64, is arranged in an annular installation space 14 which is delimited radially on the inside by the carrier part 10 and radially on the outside by a leg 15 of the U-shaped housing 8.

In this case, the roller screw drive 64 comprises a plurality of rollers 17 distributed around the circumference in a cage 16. The rollers 17 are provided on the circumferential surface with circumferential grooves 65 arranged without an incline. In the installed position, the grooves 65 of the rollers 17 engage on the outside in an internal thread 42 of the leg 15 from the housing 8 and on the inside in a thread 43 which is arranged on the lateral surface 44 of the carrier part 10. The cage 16 is supported on an end ring 18 at least on one end face. On the cage side, the end ring 18 has a roller return contour 45 which, in conjunction with recesses 46 in the internal thread 42 of the leg 15, ensures a return of the rollers 17, in accordance with known roller screw drives. As a measure for realizing a control device 7 that is as free from play as possible, a slightly different pitch of the groove flanks or the grooves 65 can be provided in a length-limited section of the roller 17 compared to the internal thread 42 or the thread 43. As an alternative, partially spherical flanks on the grooves 65 are suitable.

The disengaging device 1f is fastened to a cover 20 of the disconnect clutch 3 and thus follows the rotational movement of the disconnect clutch 3. For this purpose, the cover 20 is provided in one piece with an axially projecting cylindrical outer leg 21 which engages in the housing 8. A second annular installation space 19 intended for the release bearing 6f is delimited radially on the inside by the leg 15 of the housing 8 and radially on the outside by the outside leg 21 of the cover 20. The release bearing 6f, which is designed as a cover bearing, is connected directly to the cover 20 of the disconnect clutch 3. The outer ring 22 of the release bearing 6f is over a preferably partially arranged, in a groove 24 of the outer leg 21 engaging collar 23 rotationally fixed.

The release bearing 6f comprises rolling elements 38, the outer surface of which are provided with circumferential grooves, in order to form grooved rollers. The spacing between the grooves 39a of the rolling element 38 corresponds to that of the grooves 39b of the outer ring 22 and the grooves 39c of the leg 15. The interlocking groove profiles ensure optimal axial load transmission.

The electric motor 5f is provided in order to achieve a relative rotation between the shifting clutch 3 and the housing 8 in order to achieve an axial movement according to the double arrow of the disengaging device 1f. The rotationally symmetrical components of the electric motor 5f are arranged in the circular-shaped installation space 30 which is delimited on the outside by the outer leg 31 of the housing 8 and on the inside by the outer leg 21 of the cover 20. The stator 32a of the electric motor 5f is fixed in position on the outer leg 21 and is thus connected to the shifting clutch 3. The rotor 33a coaxially enclosing the stator 32a is on the outer leg! 31 of the housing 8 attached. The electric motor 5f also has a sliding contact 34, to which an electric cable 35 is connected.

FIG. 8 shows a component-optimized disengaging device 1g including the unit 4g. The rolling elements 38 of the release bearing 6g are guided directly on components of the release device 1g, which thus perform a double function. The roller bodies 38 designed as rollers with circumferential grooves are guided on the inside on the leg 15 of the housing 8 in accordance with FIG. 7. On the outside, the outer leg 21 forms a running surface for the rolling elements 38 of the cover 20 of the shifting clutch 3. Both the leg 15 and the outer leg 21 are provided with circumferential grooves, the groove profiles corresponding to the groove profile 39a of the rolling elements 38. All other components of the Disengaging device 1g coincide with the disengaging device 1f shown in FIG. - ^• " ^{■ '}

FIG. 9 shows the disengaging device 1h, which comprises a worm drive 52. A housing 51 of the structural unit 4h forms on the outside an at least partially cylindrical rim 54, in the outer surface 53 of which a worm profile 55 is formed, into which a worm 63 engages in a form-fitting manner. The worm 63 connects the electric motor 5d, d. H. its rotor 33d with the housing 51. According to FIG. 9, the electric motor 5d is rigidly positioned on the clutch housing 50.

Taking into account the given installation conditions, the electric motor 5d can be arranged both inside the clutch housing 5 and outside of the clutch housing 5, the screw 63 connecting the rotor 33 of the electric motor 5d to the housing 51. Alternatively, it is also possible to rigidly attach the electric motor 5d to the manual transmission 2.

The disengaging device 1h further comprises a roller screw drive 64 and a roller bearing 67 surrounding the outside of the roller screw drive 64. In addition, the disengaging device 1h has a disengaging bearing 6g. The release bearing 6g, which is designed as an inclined shoulder bearing, is provided with rolling elements 58 designed as balls, which are guided on the inside on the inner ring 56 integrally formed on the carrier part 10 and on the outside on the outer ring 57. The clutch spring 12 of the disconnect clutch 3 is non-positively supported on the radially outwardly directed, circumferential flange 60 of the outer ring 57. In order to achieve a linear movement according to the double arrow and simultaneous positioning of the carrier part 10, an anti-rotation device 59 is provided, which is integrally formed on the clutch housing 50. According to FIG. 9, the carrier part 10 is provided with a radially inward projection 61, which positively engages in a longitudinal groove 62 of an angled leg 66 of the coupling housing 50. Reference number len a disengagement device 10 carrier part b disengagement device 11 Bordc disengagement device 12 clutch spring disengagement device 13 guide nose disengagement device 14 installation space f disengagement device 15 thigh disengagement device 16 cage disengagement device 17 thread roll

Manual gearbox 18 end ring

Switch disconnector 19 installation spacea assembly 20 cover assembly 21 assembly c assembly 22 outer ring assembly 23 bundle assembly 24 nutg assembly 25 inner ring assembly 26a snap ringa electric motor 26b snap ring b electric motor 27 rolling element electric motor 28 spring washer electric motor 29 flare bushing release bearing 30 installation space removal bearing 32 removal bearing 32 removal bearing 32 removal bearing 32 removal bearing 32 release bearing release bearing 32 release bearing release bearing 32 release bearing release bearing 32 release bearing release bearing Statorg release bearing 33a rotorh release bearing 33b rotor

Actuator 33c rotor

Housing 33d rotor

Drive shaft 34 sliding contact Electric cable 56 inner ring

Coupling housing 57 outer ring

Opening 58 rolling elements

Rolling elements 59 Anti-rotation device a groove 60 Bordb groove 61 shoulder c groove 62 longitudinal groove

Cage 63 Schneckeb shoulder 64 roller screw drive

Longitudinal slot 65 groove

Internal thread 66 legs

Thread 67 roller bearings

lateral surface

Role recirculation contour

recess

Longitudinal central axis

sensor

holder

clutch housing

casing

worm drive

Lateral surface -

shelf

screw profile

Claims

claims

Disengaging device for a shift clutch (3) used between a manual transmission (2) and an internal combustion engine, comprising an axially displaceable, rotating release bearing (6a, 6c, 6d) which interacts with a clutch spring (12) of the shift clutch (3) ) which one is the manual transmission

(2) with the shifting clutch (3) connecting drive shaft (9), whereby actuation of the release bearing (6a, 6c, 6d) arranged on a carrier part (10) takes place by means of an electric motor (5a), characterized in that the electric motor ( 5a) with the release bearing (6a, 6c, 6d) and an actuating device (7) a structural unit

(4a, 4c, 4d), which is at least partially integrated in a housing (8) and connected to the shifting clutch (3) and rotates with it.

Disengaging device for a shifting clutch (3) used between a manual transmission (2) and an internal combustion engine, comprising an axially displaceable rotating release bearing (6b), which cooperates with a clutch spring of the shifting clutch, and which is designed as a cover bearing and which has a manual transmission (2) with the shifting clutch ( 3) encloses the connecting drive shaft (9), wherein the release bearing (6b) arranged on a carrier part is actuated by means of an electric motor (5b, 5c), characterized in that at least one component, preferably a rotor (33b, 33c) of the electric motor ( 5b, 5c) with the release bearing (6b) and an adjusting device (7) forms a structural unit (4b) which is connected to the switching disconnect clutch (3) and rotates with it, the further component of the electric motor (5b, 5c) , preferably the stator (32b, 32c) is rotationally rigid, in particular is fastened to the manual transmission (2). Disengaging device according to claim 1, the electric motor (2a) of which has correspondingly rotationally symmetrical components, the rotor (33a) and the stator (32a), one component coaxially enclosing the further component.

Disengaging device according to Claim 1, in which the structural unit (4a, 4c, 4d), comprising the disengaging bearing (6a, 6c, 6d), the electric motor (5a), the actuating device (7) driven by an electric motor and the carrier part (10) with a clutch spring ( 12) the disconnect clutch (3) is connected.

Disengaging device according to claim 4, wherein a cover (20) of the disconnect clutch (3) forms an axially projecting, cylindrical projection (21) which is enclosed by the U-shaped housing (8), the legs (15, 31) of which are radial on both sides forms spaced coaxial to the extension (21), annular installation spaces (19, 30) in which the electric motor (5a) or the release bearing (6a, 6c, 6d) are used.

Disengaging device according to claim 1, wherein the rotor (33a) of the electric motor (5a) is directly attached to the radially outer leg (31) of the housing (8) and the stator (32a) on the protruding projection (21) of the cover (20) ,

Disengaging device according to claim 1, wherein the rotating or rotating electric motor (5a) together with the switching clutch (3) has an electrical sliding contact (34) with a connection to which a housing-fixed cable (35) is connected.

Disengaging device according to claim 4, wherein the carrier part (10) designed as a cylindrical bushing is radially spaced in an installed position runs to the inner leg (15) of the housing (8) and thereby forms an annular installation space (14) for the actuating device (7).

9. disengaging device according to claim 1, wherein a screw drive is used as the adjusting device (7).

10. disengaging device according to claim 1, wherein the adjusting device (7) comprises a ball screw.

11. disengaging device according to claim 1 or claim 2, the adjusting device (7) comprises a roller drive with cylindrical, symmetrically circumferentially arranged rollers (17) which form-fit into an internal thread (42) of the inner leg (15) of the housing (8 ) and engage a thread (43) of the carrier part (10).

12. Disengaging device according to claim 11, wherein the rollers (17) of the roller drive are guided in a cage (16) which is supported at least on one end face on an end ring (18) or on a limiting collar.

13. Disengaging device according to claim 11, in which the internal thread (42) intended for the rollers (17) on the leg (15) is provided with longitudinally extending recesses (46) in connection with an end-side roller return contour (45) of the end ring (18) or the limit collar at a defined end position, an automatic

Ensure return of the rollers (17).

14. Disengaging device according to claim 11, wherein the cage (16) is guided on both end faces on end rings (18).

15. disengaging device according to claim 11, wherein to achieve a reduced friction of the adjusting device (7) at least one groove flank of the thread roll (17), the internal thread (42) on the leg (15) or of the thread (43) of the carrier part (10) has a specific crown.

16. disengaging device according to claim 11, wherein to achieve a play-free adjusting device (7) at least one pitch, a groove, on the rollers (17) different from a thread pitch of the internal thread (42) on the leg (15) or the thread ( 43) is designed by the carrier part (10).

17. Disengaging device according to claim 11, in which the adjusting device (7) to achieve a backlash has groove flanks that are at least partially, alternately designed as load-bearing and with the adjoining groove flank as non-load-bearing, and that at least partially one half of the rollers (7 ) have oppositely formed groove flanks.

18. Disengaging device according to claim 1 or claim 2, wherein the carrier part (10), on the side facing the shifting clutch (3), has a circumferential rim (11) oriented at right angles to a longitudinal central axis (47) of the shifting clutch (3). on which the

Coupling spring (12) are supported.

19. Disengaging device according to claim 18, wherein the board (12) is provided with guide lugs (13) which ensure a non-rotating, position-oriented support of the clutch springs (12) on the carrier part (10).

20. Disengaging device according to claim 1, which is provided for actuating a shift separating clutch (3) connected to a dual-mass flywheel.

21. Disengaging device according to claim 1, which is used for a switching clutch designed as a double clutch (3).

22. The release device according to claim 1, in which a roller bearing is provided as the release bearing (6a to 6d).

23. Release device according to claim 22, wherein the release bearing (6a, 6b) is designed as a deep groove ball bearing or as a double row angular contact ball bearing.

24. Release device according to claim 22, provided with a release bearing designed as a cylindrical roller bearing (6c to 6d).

25. The release device according to claim 22, wherein the release bearing (6c) has a separate outer ring (22) and the rolling elements (38) are guided on the inside directly on the leg (15) of the housing (8).

26. Disengaging device according to claim 22, wherein the structure of the release bearing (6d) includes rolling elements (38) on the outside on the cylindrical projection (21) of the cover (20) of the disconnect clutch (3) and on the inside on the leg (15) of the U -shaped housing (8) are guided directly.

27. Disengaging device according to claim 22, wherein as a measure to avoid slippage, at least one component of the release bearing (6a) is non-positively acted upon by a spring means.

28. The release device according to claim 22, wherein the release bearing (6a, 6d) has an internal preload which can be achieved by a different distance between the rolling elements (27) and a corresponding sorting of the rolling elements (27) and by means of a through the flare sleeve

(29) is maintained during operation. Disengaging device according to claim 1, which is provided for a pulled switching clutch (3).

Disengaging device according to claim 2, wherein both the rotor (33c) and the stator (32c) of the electric motor (5c) are aligned radially to the longitudinal central axis (47) of the disengaging device (1c).

Disengaging device according to claim 2, wherein the stator (32b, 32c) is switched so that the electromotive drive acts as an electric brake and initiates the disengaging process by means of a braking torque by the actuating device (7).

Disengaging device according to claim 1 or claim 2, wherein the rolling element raceway of the disengaging bearing (6a to 6d) and / or sliding or positively engaging components of the actuating device (7) are one

Have DLC (Diamond like carbon) coating.

Disengaging device according to claim 1 or claim 2, wherein the rim (11) of the carrier part (10) on which the coupling spring (12), which is preferably designed as a plate spring, is supported is coated in a contact area with TN or Teflon.

Release device according to Claim 1, which has at least one sensor (48) for detecting a position position and / or an actuating force, which sensor is designed as a force or displacement sensor.

Disengaging device for a shifting clutch (3) used between a manual transmission (2) and an internal combustion engine, comprising an axially displaceable release bearing (6f) which interacts with a clutch spring (12) of the shifting clutch (3) and which has a shifting clutch (2) with the shifting clutch (3) connecting drive shaft (9), wherein an actuation of the release bearing (6b) and an actuating device (7) by means of an electric motor (5d), characterized in that the torsionally rigid electric motor (5d), which is arranged separately from the actuating device (7), is connected to the actuating device (7) via a worm drive (52).

36. Disengaging device for a shift separating clutch (3) used between a manual transmission (2) and an internal combustion engine, comprising an axially displaceable, rotating release bearing (6f), which interacts with a clutch spring (12) of the shift separating clutch, which one of the manual transmissions (2) with the Switching clutch (3) connecting drive shaft (9) encloses, an electric motor (5a) used to actuate the disengaging device forms a structural unit (4f) with the disengaging bearing (6f) and an actuating device (7), which is at least partially in a housing ( 8) is integrated and connected to the switching disconnect clutch (3), characterized in that at least one rolling bearing of the actuating device (7) comprises rolling elements (17, 38) designed as RoNen, which have circumferential grooves (39a, 65) which form-fit into corresponding ones Grooves (39b, 39c) formed as an outer ring (22), carrier part (10), outer leg (22) or leg (15) Interactively engage the bearing rings.

37. Disengaging device according to claim 35, wherein the worm drive (52) with a worm (53) positively engages in a worm profile (55) of a housing (51) connected to the adjusting device (7).

38. Disengaging device according to claim 35, wherein rolling elements (58) of the disengaging bearing (6g) between a first bearing ring (56) connected in one piece with a carrier part (10) of the actuating device (7) and a second bearing ring rotating with the shifting clutch (3) (57) are performed.

39. Release device according to claim 38, wherein the inner ring (56) of the release bearing (6g) is integrally formed on the end of the carrier part (10) and the outer ring (57) of the release bearing (6e) has a radially outward directed board (60) forms on which the clutch spring (12) of the disconnect clutch (3) is non-positively supported.

Disengaging device according to claim 35, wherein an anti-rotation device (59) is provided between a torsionally rigid component of the clutch housing (50) or the gearbox (2) and the carrier part (10).

Disengaging device according to claim 36, the actuating device (7) of which comprises a disengaging bearing (6f) which surrounds a roller screw drive (64) on the outside, the disengaging bearing (6f) corresponding to the

Roller screw drive (64) comprises the same dimensioned rolling elements (17, 38) provided with circumferential grooves (39a, 65).

Disengaging device according to claim 41, wherein the grooves (65) of the rolling elements of the roller screw drive (64) designed as rollers (17) in groove profiles of the carrier part (10) and of the leg (15) designed as threads (43) or as internal threads (42). intervene positively.

Disengaging device according to claim 35 or according to claim 36, wherein the rolling element raceways of the rolling elements (17, 38, 58) of the release bearing (6f, 6g) and of the roller screw drive (64) and / or sliding or positively engaging components of the actuating device (7) are one DLC (diamond like carbon) hard material coating.