WO2012120149A2 - Antriebseinrichtung mit aktiv gelagerter antriebswelle - Google Patents
Antriebseinrichtung mit aktiv gelagerter antriebswelle Download PDFInfo
- Publication number
- WO2012120149A2 WO2012120149A2 PCT/EP2012/054252 EP2012054252W WO2012120149A2 WO 2012120149 A2 WO2012120149 A2 WO 2012120149A2 EP 2012054252 W EP2012054252 W EP 2012054252W WO 2012120149 A2 WO2012120149 A2 WO 2012120149A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- drive shaft
- bearing element
- active bearing
- drive
- drive device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/08—Structural association with bearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C25/00—Bearings for exclusively rotary movement adjustable for wear or play
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/08—Structural association with bearings
- H02K7/081—Structural association with bearings specially adapted for worm gear drives
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C39/00—Relieving load on bearings
- F16C39/02—Relieving load on bearings using mechanical means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C29/00—Bearings for parts moving only linearly
- F16C29/001—Bearings for parts moving only linearly adjustable for alignment or positioning
Definitions
- the invention relates to a drive device for an adjusting device of a motor vehicle according to the preamble of claim 1 and a method for operating such a drive device.
- a drive device for an adjusting device of a motor vehicle comprises a housing of the drive device at least partially enclosing housing or a housing portion and an electric motor driven, along a longitudinal direction extending drive shaft which is axially mounted at least one end to the housing or the housing portion.
- Such a drive device can be used for example in the context of an adjusting device in the form of a window lifter on a vehicle door or in the form of, for example, a seat adjustment or a sunroof operation.
- a drive shaft is axially mounted on a housing of the drive device.
- the storage can be done, for example, characterized in that the drive shaft axially to the housing or a Housing portion rests or runs over an example disc-shaped starting element for providing a low-friction bearing on the housing.
- the drive shaft in a conventional drive device has an axial clearance to the housing axially supporting the drive housing, which can not be completely avoided regularly and can change during operation of the drive device due to wear. Due to such an axial play, noise may occur during operation of the drive device, for example when switching the direction of rotation of the drive device and consequently a change in the axial load direction of the drive shaft (the so-called shift clutches). In addition, the change of the axial clearance due to wear during operation can also adversely affect the performance of the drive device and lead to a troubled run of the drive device.
- the drive shaft is encompassed radially by a piezoelectric actuator which acts in a braking manner on the drive shaft of the drive device when, for example, a clamping part is detected on a window pane to be adjusted by the window lifter.
- a piezoelectric actuator which acts in a braking manner on the drive shaft of the drive device when, for example, a clamping part is detected on a window pane to be adjusted by the window lifter.
- An axial bearing is not effected by the actuator described in EP 1 436 880 B1.
- a piezoelectric sensor arranged at an axial end of a drive shaft which receives axial forces arising on the drive shaft and evaluates these in order to detect a trapping case on an adjusting device.
- the drive shaft is on the one hand directly to a housing of the drive means and on the other hand via a spring which acts on the piezoelectric sensor, stored.
- the present invention has for its object to provide a drive device and a method for operating such a drive device available with which an advantageous axial bearing of a drive shaft can be achieved.
- an active bearing element is arranged, which is adapted to act during the operation of the drive means axially along the longitudinal direction of the drive shaft.
- the active bearing element may be configured to cause inhibition of rotational movement of the drive shaft in response to actuation.
- a wrap spring In a wrap-around brake conventionally provided as a brake device, for example, a wrap spring must be dragged along in the course of normal operation of a drive device, which results in friction that is not negligible and, consequently, an increased expenditure of force.
- an active bearing element is provided, which selectively causes depending on its operating position inhibiting a rotational movement of the drive shaft or not, friction losses can be reduced during normal operation, in which the drive shaft is to run unchecked.
- an inhibition of the drive shaft can then be effected by means of the active bearing element, so that the drive shaft is detected and prevented in this way from rotating.
- the active bearing element may be formed, for example, as a piezoelectric actuator, as an electromagnetic actuator or as a magnetostrictive actuator.
- the active bearing element is actively actuated by applying an electrical, electromagnetic or magnetic signal and thus actively acts on the axial play of the drive shaft relative to the housing.
- the axial play is thus not predetermined statically when mounting the drive device by passive elements, but can be actively influenced and controlled by suitable control of the storage element.
- the active bearing element is operable to set an axial clearance of the drive shaft relative to the housing or housing portion and / or influencing the vibration behavior of the drive shaft and adapted to act axially along the longitudinal direction of the drive shaft.
- the active bearing element Due to the fact that the active bearing element is additionally used to set an axial play, the active bearing element fulfills a dual function. On the one hand, the active bearing element can cause inhibition of the rotational movement of the drive shaft in response to its operating position. On the other hand, when the actuator does not cause inhibition of the rotational movement of the drive shaft, the active bearing element acting on the drive shaft, that actively the axial play of the drive shaft is set in an advantageous manner.
- the active bearing element can act on the drive shaft, that the axial play of the drive shaft is advantageously set active, the axial play static or dynamic depending on a load the drive shaft can be adjusted.
- At least one end noise during operation can be avoided for example when switching the direction of rotation of the drive means by the axial play of the drive shaft during operation in a suitable manner specified, for example, is minimized and a load change of the drive shaft so can not lead to an axial displacement.
- the operating behavior of the drive device can be controlled, for example, as a function of specific operating states.
- the axial play of the drive shaft can be increased, for example in the case of a cold start of the drive device, in order to optimize a cold start and then to reduce or variably specify the clearance in further operation of the drive device.
- an engine imbalance can be compensated by dynamic response to imbalances and possibly thereby excited at the drive shaft vibrations by dynamic variation of the axial play of the drive shaft.
- a dynamic increase in the excitation of a motor (anchor) unbalance can here conventionally in systems in which the axial clearance is not actively balanced, arise from the fact that starting from a quasi axial backlash of the armature shaft due to manufacturing tolerances or wear on at least one axial End of the armature shaft (depending on the starting direction of the motor) sets an axial floating bearing. Due to a swirl effect of the rotating motor armature can then lead to an increase in the motor excitation.
- the active bearing element may advantageously be arranged axially between the housing or housing section and the associated end of the drive shaft as viewed along the longitudinal direction. In principle, it is sufficient to provide an active bearing element at one axial end of the drive shaft. Optionally possible and conceivable, however, is also to provide at both axial ends of the drive shaft in each case an active bearing element which is arranged between the associated axial end of the drive shaft and a thrust bearing serving housing portion.
- the active bearing element causes depending on an operation inhibiting a rotational movement of the drive shaft.
- the bearing element for example, braking effect, depending on the set by the active bearing element axial play on the drive shaft. This can serve, for example, to brake a rotational movement of the drive shaft upon detection of a trapping case and thus to prevent a further adjustment of an adjusting part to be adjusted.
- the drive device in a Standstill be set so that at a standstill of the drive device to be adjusted adjustment does not adjust due to externally acting forces or their own weight.
- a braking device for inhibiting the rotational movement of the drive shaft in response to certain operating conditions, which cooperates with the active bearing element and is designed to inhibit a rotational movement of the drive shaft braking in cooperation with the active bearing element.
- the brake device can be coupled to the active bearing element via a lever gear designed as a transmission gear and can have at least one brake shoe for braking the drive shaft.
- the one or more brake shoes may, for example, be biased towards the housing or housing section of the drive device in the direction of a position in which the at least one brake shoe abuts the drive shaft or a brake disk arranged on the drive shaft in a braking manner.
- the active bearing element may be coupled in this case, for example, for releasing the at least one brake shoe from the braking position with the at least one brake shoe, so that upon actuation of the active bearing element, the brake shoe is released from its braking engagement with the drive shaft.
- the axial play can be adjusted in the desired manner via the active bearing element during operation of the drive device.
- the active bearing element thus does not interact self-locking with the drive shaft, but is used for indirect control of the braking device for producing or releasing the braking effect, which in Dolphinstromung due to suitable bias the brake shoes automatically moves to its braking position and only when energizing the active bearing element from this braking position be solved.
- the active bearing element for example, via a stop element axially for adjusting the axial play of the drive shaft with the associated end of the drive shaft in contact.
- the starting element can for example be arranged on the active bearing element and connected to the bearing element, which is particularly conceivable and possible that the starting element is biased by a spring axially against the active bearing element for abutment with the associated end of the drive shaft.
- the axial play is not set solely via the active bearing element, but in an interaction of the active bearing element with the spring biasing the starting element. The axial play is thus on the one hand actively set on the active bearing element and on the other hand on the spring characteristic of the biasing spring.
- the active bearing element can be configured, for example, as a piezoelectric actuator, as an electromagnetic actuator or as a magnetostrictive actuator, this being understood merely as an example and also other possibilities for designing the active bearing element are conceivable. If the active bearing element is constructed as a piezoelectric actuator, then the active bearing element can advantageously be constructed in multiple layers with a plurality of piezoelectric layers.
- An active bearing element designed, for example, as a piezoelectric actuator can serve as a sensor for detecting vibrations and as an actuator for generating the compensation signal, wherein the active bearing element can be operated simultaneously or alternately as a sensor for detecting vibrations and as an actuator for generating the compensation signal.
- a single piezoelectric element can thus be used both as a sensor and as an actuator.
- the active bearing element servess the active bearing element alternately as a sensor and as an actuator (ie, the sensor operation and the actuator operation are staggered in time), the sensor operation is preferably shorter in time than the actuator operation.
- the active bearing element is advantageously connected to a control electronics, via which the axial clearance is adjusted and regulated. On the one hand, it is possible to set and specify the axial clearance in a quasi-static manner during operation of the drive device by adjusting the axial play and changing the situation depending on the situation, for example switching off the drive device or detecting a trapping case.
- the control electronics can be designed in this second case to generate the compensation signal for canceling the detected vibrations or for controlling these vibrations to a predetermined target function, ie in response to excited at the drive shaft oscillations in amplitude and phase to compensate for the excited vibrations Generate compensation signal.
- the object is also achieved by a method for operating a drive device for an adjusting device of a motor vehicle.
- the drive device in this case has a component of the drive device at least partially enclosing housing or a housing portion and an electric motor driven, along a longitudinal direction extending drive shaft which is axially mounted at least one end to the housing or housing portion on. It is provided that at least one end of the drive shaft between the housing or housing portion and the drive shaft, an active bearing element is arranged, which is actuated during operation of the drive means to act axially along the longitudinal direction of the drive shaft.
- the active bearing element causes in a first operating state of the drive means inhibiting a rotational movement of the drive shaft and is operated in a second operating state of the drive means for adjusting an axial play of the drive shaft relative to the housing or housing portion and / or influencing the vibration behavior of the drive shaft and acts axially thereto along the longitudinal direction of the drive shaft.
- the advantages and advantageous embodiments described above for the drive device are analogously also applied to the method.
- the active bearing element can in particular be used to adjust the axial clearance as a function of an operating state of the drive device, for example as a function of the operating temperature of the drive device.
- the active bearing element can brake the drive shaft upon detection of a trapping event on a component driven by the drive device (in particular to prevent inertia-related trailing).
- the active bearing element acts directly braking on the drive shaft or indirectly serves to control a braking device.
- the active bearing element generates a compensation signal in response to vibrations excited at the drive shaft during operation of the drive device, which counteracts the vibrations of the drive shaft.
- the oscillations excited at the drive shaft can essentially be extinguished, for example in a predetermined frequency range, or the excited vibrations can be modified such that a specific target function of these oscillations results, which leads to only a low noise development and an advantageous operating behavior of the drive device.
- the frequency range in which the operating behavior can be dynamically influenced in this way can be, for example, between 20 Hz and 500 Hz, in particular between 20 Hz and 150 Hz.
- FIG. 1 shows an overview view of an adjusting device in the form of a
- Fig. 2 is a schematic view of a drive device with an axially mounted on an active bearing element drive shaft.
- Fig. 3 shows another embodiment of a mounted via an active bearing element drive shaft, in addition to a braking device in Depending on the actuation of the active bearing element is braked;
- Fig. 4 is a view of another embodiment of an actively stored
- FIG. 5 is a view of an embodiment modified from the embodiment of FIG. 4;
- Fig. 6 is a view of another embodiment of an actively stored
- Fig. 7 is a schematic view of a multilayer structure, active
- Storage element in the form of a piezoelectric actuator
- Fig. 8 is a schematic view of a controlled via an electronic control system
- 9A is a schematic view of another embodiment of a
- FIG. 9B shows a schematic view of the drive device according to FIG. 9A, in an energized state of the active bearing element
- FIG. 10 shows a schematic view of a further embodiment of an actively mounted drive shaft
- Fig. 1 1A-1 1 G schematic views of different piezoelectric active
- FIG. 13 is a schematic view of yet another embodiment of an actively mounted drive shaft
- 14 shows a view of a braking device acting radially on a drive shaft.
- Fig. 1 shows an adjusting device 1 in the form of a double-stranded cable window lifter, which serves for adjusting a window pane 4 on a vehicle door.
- the adjusting device 1 in the form of the window regulator is arranged on an assembly carrier 3, which can be fastened to a vehicle door in a modular manner together with the adjusting device 1 arranged thereon for providing a door module and can be configured in particular in a state fastened to the vehicle door Wet space N of the vehicle door from a drying room T moisture-proof to separate.
- the adjusting device 1 in the form of the window regulator has a drive device 2 and two guide rails 1 1, 12 extended in parallel.
- the drive device 2 is connected via an at least partially guided in a Bowden cable 13 traction means 130 in the form of a flexible traction cable with guided on the guide rails 1 1, 12 drivers 14, 15, via which the window pane 4 on the guide rails 1 1, 12 is slidably mounted ,
- the traction means 130 extends from a cable drum 10 of the drive device 2 to an upper deflecting element 1 10 of a guide rail 1 1, from this upper deflecting element 1 10 along the guide rail 1 1 to a lower deflecting element 1 1 1, of this lower deflecting the first 1 1 diagonally to an upper deflecting element 120 of the other guide rail 12, along the other guide rail 12 toward a lower deflecting element 121 and from there back to the cable drum 10.
- the traction means 130 forms in this way a closed loop of rope, by a rotational movement of the cable drum 10 in position for adjusting the driver 14, 15 along the
- the drive device 2 has an electric motor 20, a housing enclosing a gear 21 and a bearing cap 22 enclosing the cable drum 10.
- the drive device 2 is connected via connection points 30 with the subframe 3 and thus held on the subframe 3.
- the drive device 2 shows a schematic view of a first exemplary embodiment of the drive device 2.
- the drive device 2 has an electric motor 20 with a rotor 204 and a drive shaft 200, which engages with a worm wheel 23 via a worm 201 arranged on the drive shaft 200 and via the Worm wheel 23 with the cable drum 2 (see Fig. 1) is in operative connection.
- the drive shaft 200 is radially mounted on the housing 21 via a spherical bearing 203 and a Poltopflager 205 so designated and simultaneously supported axially on the housing 21 via a starting element 202 on the one hand and a starting element 206 and an active bearing element 5 in the form of a piezoelectric actuator.
- the active bearing member 5 serves to actively support the drive shaft 200 axially along a longitudinal direction L, along which the drive shaft 200 extends, with respect to the housing 21.
- the active bearing element 5 in the form of the piezoelectric actuator can be energized by applying an electrical signal to adjust an axial clearance of the drive shaft 200 and thus to influence the storage of the drive shaft 200 along the longitudinal direction L.
- the active support of the drive shaft 200 via the active bearing element 5 can serve to adjust the axial play depending on certain operating conditions of the drive device 2.
- the axial clearance can be reduced so that when switching the direction of rotation of the drive means, as a result of which the load direction of the forces acting on the drive shaft 200 changes forces, there is no noise, which is otherwise called switching clutches possibly be perceivable.
- the axial clearance can be adjusted, for example, depending on certain operating conditions in different ways, for example, during a cold start of the drive device 10, a comparatively large axial play of the drive shaft 200 pretend, so that startup problems of the drive device 2 are avoided.
- the axial play can also be dynamically controlled via the active bearing element 5 such that oscillations of the drive shaft 200, which act in particular in the axial direction, are dynamically compensated or at least modified such that there is negligible, but at least non-disturbing oscillation and noise excitation on the drive device 2 is coming.
- a braking effect can be achieved by way of the active bearing element 5, for example, by detecting the application of a clamping case of the adjusting device 1 (see FIG. 1) by applying a contact pressure, the drive shaft 200 is braked.
- the drive shaft 200 and thus the Drive device 2 are set at a standstill with non-energized drive device 2, so that at engine standstill there may be no unwanted adjustment of an adjusting part to be adjusted (window, see Fig. 1) due to externally acting load forces or the weight of the adjustment.
- the active bearing element 5 is advantageously designed as a piezoelectric actuator. However, it is also conceivable and possible to design the active bearing element 5 by an electromagnetic actuator or a magnetostrictive actuator. Accordingly, the actuator is controlled via an electrical signal (piezoelectric actuator), an electromagnetic signal (electromagnetic actuator) or a magnetic signal (magnetostrictive actuator). It is common to the actuators that the applied signal is converted into a mechanical change in length of the actuator, by means of which the axial play of the drive shaft 200 can be adjusted in the desired manner.
- a bearing element 5 configured as a piezoelectric actuator may be constructed in multiple layers with a plurality of piezoelectric layers 510, 520, 521, 522, 523.
- the layers are then mechanically interconnected, stacked and electrically connected in parallel ,
- a layer 510 can realize a piezoelectric sensor which can absorb and detect forces and stresses acting on the active bearing element 5.
- the other layers 520, 521, 522, 523 realize the piezoelectric actuator and, due to the multi-layered design, allow a change of axial play over a comparatively large amplitude.
- FIG. 3 A modified embodiment of an active support of the drive shaft 200 is shown in FIG. 3.
- an active bearing element 5 interacts with a braking device 8 via a starting element 53, by the active bearing element 5 on a lever gear 83 and the lever gear 83 on brake shoes 81, 82 acts.
- the brake shoes 81, 82 are used for braking the drive shaft 200 and are for this purpose, in a braking position, axially against a braking surface 208 at an end, axial end 200 A of the drive shaft 200 at. In this braking position, the brake shoes 81, 82 are biased by a spring 84 relative to the housing 21. If the active bearing element 5 is not energized, that is not actuated, the brake shoes 81, 82 are in their braking position.
- the active bearing element 5 If, however, the active bearing element 5 is energized to set the axial play of the drive shaft 200, the active bearing element 5 expands, piezoelectrically excited, along the longitudinal direction L and thereby acts on the lever gear 83 so that it is pivotably mounted about pivot points D1, D2 Levers 831, 832, the brake shoes 81, 82 are moved from its braking position and removed from the braking surface 208 of the front end 200 A of the drive shaft 200.
- the drive shaft 200 is thus no longer braked via the brake shoes 81, 82, and at the same time can be adjusted via the active bearing element 5, for example designed as a piezoelectric actuator, the axial play of the drive shaft 200 along the longitudinal direction L by the start-up element 53 of the active bearing element. 5 the example, disk-shaped configured starting element 206 on the side of the drive shaft 200 approximated and optionally brought into contact with this.
- the drive shaft 200 is braked and inhibited in an indirectly controlled manner via the active bearing element 5.
- the active bearing element 5 is energized to release the brake device 8 and can then serve in the energized state for quasi-static or dynamic adjustment of the axial play of the drive shaft 200. If the energization of the active bearing element 5 is canceled, then the brake shoes 81, 82 return due to their bias on the spring 84 in its braking position, so that the drive shaft 200 is braked again and set at a standstill of the drive device 2.
- the brake shoes 81, 82 of the brake device 8 do not act on a friction surface at a front end of the drive shaft 200, but on an annular disc 207, the is attached to the axial end 200A of the drive shaft 200. Otherwise is the operation of the embodiment of FIG. 4 as described above with reference to the embodiment of FIG. 3.
- FIG. 5 in turn is only slightly modified compared to the embodiment of FIG. 4.
- the starting element 53 extends on the side of the active bearing element 5 in the active bearing element 5 along the longitudinal direction L inside and even designed as an active bearing element.
- the (active) starting element 53 serves to adjust the axial play of the drive shaft 200.
- the active bearing element 5, on the other hand, serves exclusively for actuating the braking device 8.
- FIG. 6 shows an exemplary embodiment which differs from the exemplary embodiments according to FIGS. 4 and 5 in that the thrust element 53 is prestressed elastically with respect to the active bearing element 5 via an additional spring 54.
- This causes the axial play of the drive shaft 200 is not specified solely on the active bearing element 5, but on the other hand results from the setting of the active bearing element 5 on the one hand and the spring characteristic of the spring 54.
- By suitable energization of the active bearing element 5 and design of the spring characteristic but this is also possible to bring the thrust element 53 so in contact with the end 200A of the drive shaft 200 that elasticity in the axial play is excluded and the axial play of the drive shaft 200 is thus minimized as much as possible ,
- control electronics 9 can be provided to control and regulate the active bearing element 5, the drive device 2.
- the control electronics 9 can be integrated into the electronics of the drive device 2. It is also conceivable to design the control electronics 9 as part of a door control unit separately from the drive device 2.
- the control electronics 9 is electrically connected to the formed as a piezoelectric actuator, active storage element 5 and is used to energize this active storage element 5.
- the control electronics 9 can be based on external Specifications and variables, such as the temperature in or outside the vehicle or the operating temperature of the electric motor 20, specify an axial play and set in a quasi-static manner, for example, event-dependent.
- the active bearing element 5 can be controlled in such a way that the drive device 2 is braked and locked (as described above with reference to the exemplary embodiments according to FIGS. 2 to 6).
- the active bearing element 5 can also be dynamically controlled so that a vibration excitation of the drive means 2 for noise minimization and for minimizing the excitation of with the drive device 2 coupled components, if possible, at least attenuated.
- a compensation signal can be generated via the active bearing element 5, which is just in phase with the excited vibrations on the drive shaft 200 and counteracts vibrations excited at the drive shaft 200 in this way.
- the active bearing optionally results in an improvement in the anti-jamming function in that the drive device can be decelerated in a controlled manner upon detection of a trapping case.
- the drive device it is also possible to design the drive device as a whole smaller and lighter, because a transmission can be used with an increased efficiency, which need not be configured self-locking.
- an additional braking device for example a wrap spring, can be dispensed with.
- an improvement in the detection of an adjustment of an adjustment by detection of a motor current signal may result, because due to the active Storage, the drive shaft can be set at standstill of the drive device and thus the drive shaft no random positions (relative to the last energized and detected for example via ripple of the motor current position before switching off the engine) can take.
- FIGS. 9A and 9B show a further embodiment of a drive device 2 with a drive shaft 200, which is actively supported via an active bearing element 5 in the form of a piezoelectric element.
- the active bearing element 5 serves on the one hand to adjust via a stop element 53, which is guided via a spring 54 on a fixedly connected to the active bearing element 5 guide member 530, in a normal operation of the drive device 2, an axial play of the drive shaft 200, so that a advantageous operating behavior can be achieved.
- the axial play can be used in this way, for example, static or quasi-static for setting a fixed game. But it is also possible to change the axial play dynamically during operation of the drive device 2, so that imbalances can be compensated dynamically or a noise excitation can be modified, so that a noise excitation in predetermined frequency ranges, for example, is minimized.
- the active storage element 5 is used to indirectly actuate a braking device 8.
- the brake device 8 has brake shoes 81, 82, which may be designed as a one-piece brake element in the form of a brake ring and rest in a braking state via a friction element 810 on an axial friction surface 208 of the drive shaft 200, as shown in Fig. 9A.
- the brake shoes 81, 82 are rotationally fixed relative to a housing 21 supported by a radial support 85 and biased in the axial direction along the longitudinal axis L via a spring 84 relative to the housing 21.
- the braking device 8 serves, in an operating state in which an inhibition of the drive device 2 is desired, to act in a braking manner on the drive shaft 200 in the axial direction, so that the drive shaft 200 is inhibited and can not easily be rotated about the longitudinal axis L. In this way, by means of the braking device 8, the drive shaft 200 can be determined, so that on the output side the actuator 2 adjacent forces are locked or on detection of a Einklemmfalls a further movement of the drive shaft 200 is not possible.
- the braking device 8 is actuated via the active bearing element 5.
- the brake shoes 81, 82 of the brake device 8 are for this purpose coupled via a lever gear 83 with the active bearing element 5.
- the lever mechanism 83 has levers 831, 832, which are mounted pivotably on the housing 21 about an axis of rotation B1 and rest with a short end on the active bearing element 5 and with a long end on the brake shoes 81, 82.
- the lever mechanism 83 implements a transmission gear, which is designed to transmit a small displacement of the active bearing element 5 in a relatively large displacement of the brake shoes 81, 82.
- the transmission ratio for example, be 1:15, so that, for example, an adjustment of the active bearing element 5 by 50 ⁇ in an actuation of the brake shoes 81, 82 of 750 ⁇ is transmitted.
- the active bearing element 5 is used in cooperation with the braking device 8 to provide in a de-energized state of the drive device 2, ie engine stall, an inhibition of the drive device 2, in an energized state of the engine, ie in a normal operation of the drive device 2, the drive shaft 200, however, release to allow a smooth movement of the drive shaft 200.
- the escapement is switchable in this way, and in addition, the axial play of the drive shaft 200 is set in the desired manner via the active bearing element 5 during normal operation of the drive device 2.
- the active bearing element 5 In the non-energized state of the motor, shown in Fig. 9A, the active bearing element 5 is not subjected to an electrical voltage. In this state, the brake shoes 81, 82 due to the bias of the spring 84 via the friction element 810 rubbing against the friction surface 208 of the drive shaft 200, so that the drive shaft 200 is determined due to a frictional connection with the brake shoes 81, 82 and can not be rotated , The active bearing element 5 has a length L1 in this state and does not restoring the brake shoes 81, 82.
- the drive device 2 is to be actuated for adjusting an adjustment part, then the drive device 2 is energized and also a voltage to the active Positioning element 5 is applied, which leads to an elongation of the active bearing element 5, as shown in Fig. 9B.
- the active bearing element 5 acts on the brake shoes 81, 82 via the levers 831, 832 of the lever mechanism 83 and pulls them away from the drive shaft 200, so that the friction element 810 no longer frictionally engages the friction surface 208 of the Drive shaft 200 is (the frictional connection is canceled, a slight rubbing contact of the friction element 810 on the friction surface 208 may still exist).
- the brake device 8 By actuating the active bearing element 5, the brake device 8 is thus actuated to release the drive shaft 200.
- the abutment element 53 is brought into abutment with the drive shaft 200 and / or the abutment of the abutment element 53 is reinforced at the end 200A of the drive shaft 200 so that the axial play of the drive shaft 200 can be adjusted in the desired manner by means of the active bearing element 5 via the abutment element 53 ,
- Fig. 10 shows a further embodiment of a drive device 2 with an actively mounted drive shaft 200.
- a plurality of active bearing elements 5A, 5B, 5C are connected axially in series between the end 200A of the drive shaft 200 and the housing 21, so that the effect the active bearing elements 5A, 5B, 5C added.
- the active bearing elements 5, 5A, 5B, 5C are advantageously formed as piezoelectric elements, of which embodiments in Fig. 1 1 A to 1 1 G are shown. As shown in FIG.
- the active bearing element 5, 5A, 5B, 5C may, for example, comprise an actuator section 52 consisting of individual piezoelectric layers to which a positive voltage V + or a negative voltage V- may be applied to the Actuator section 52 along the direction of the applied voltage to shorten or lengthen.
- the actuator section 52 laterally spring portions 524 are mounted, which project laterally from the Aktuatorabêt 52 and a width B of the active bearing element 5, 5A, 5B, 5C cause.
- the actuator portion 52 may elongate, so that the width B decreases by acting on the spring portion 524. Conversely, when a negative voltage V- is applied to the actuator portion 52, the width B increases due to shortening of the actuator portion 52.
- FIG. 11B Another exemplary embodiment of an active bearing element 5, 5A, 5B, 5C in the form of a piezoelectric element is shown in FIG. 11B.
- an actuator portion 52 is provided consisting of a piezoelectric element which extends meandering and thus provides a piezoelectric portion of great length. Because the elongation of a piezoelectric element is proportional to the length of the piezoelectric element when a voltage is applied, in this way, when a positive voltage V + or a negative voltage V- is applied between the ends of the actuator section 52, an enlargement or reduction of the width B of the active supporting element 5, 5A, 5B, 5C.
- FIG. 11C Another embodiment of an active bearing element 5, 5A, 5B, 5C is shown in FIG. 11C.
- the active bearing element 5, 5A, 5B, 5C has a plate-shaped actuator section 52 on which an active section 526 is arranged via spring webs 525. By applying a voltage to the actuator section 52, the active section 526 can be moved in a direction C or counter to the direction C relative to the actuator section 52 via the spring webs 525.
- a spring section 524 is shown is arranged on an actuator section 52 shaped in the manner of an "8", wherein the spring section protrudes on both sides from the actuator section 52 (see FIG. 11D) and is secured in recesses of the 8-shaped actuator section 52.
- V + a voltage
- V- the actuator portion 52 may be lengthened or shortened so that the width B of the active bearing member 5, 5A, 5B, 5C may be made smaller or larger.
- spring sections 524 are embodied in sections in a rigid manner, wherein the rigid sections are connected to one another via joints 524a.
- the spring section 524 is formed in one piece and surrounds the actuator section 52, wherein sections of the spring section 524 are connected to one another via hinges 524a in the form of film hinges.
- V +, V- the width B of the active storage element 5, 5A, 5B, 5C can be changed.
- Piezoelectric actuator systems are also described, for example, in the dissertation by Muhammed Abed Al-Wahab, "New Actuator Systems Based on Structured Piezoceramics” University of Magdeburg, 2004.
- the described embodiments of active bearing elements 5, 5A, 5B, 5C in the form of piezo elements are to be understood merely as examples.
- the exemplary embodiments according to FIGS. 1 1A, 1 1 B, 1 1 C bring about an amplification of the actuation travel in such a way that a comparatively small elongation or shortening of the actuator section 52 results in a comparatively large enlargement or reduction of the width B of the active bearing element 5, 5A , 5B, 5C is implemented.
- the axial play can be adjusted in a static (quasi-static) or dynamic manner.
- the active bearing elements 5A-5C may in this case be such that when no voltage is applied to the piezoelectrically formed bearing elements 5A-5C, the drive shaft 200 undergoes a defined bias in the axial direction. Is a positive voltage to the piezoelectric Laying elements 5A-5C applied, so the bias can be reduced or even canceled completely. When a negative voltage is applied to the active support members 5A-5C, the bias voltage can be increased.
- the number of piezoelectric bearing elements 5A-5C can be selected depending on the need and the desired amplitude of the change in length.
- the housing 21 In the region of the housing 21, in which the piezoelectric active bearing elements 5A-5C are arranged (in Fig. 10 corresponding to the portion of the housing 21 to the right of the drive shaft 200), the housing 21 may be formed at least slightly elastic in the radial direction. This makes it possible to compensate for a change in length of the piezoelectric active support members 5A-5C without jamming the active support members 5A-5C in the housing 21.
- FIG. 12 shows another embodiment of an actively mounted drive shaft 200. This is modified compared with the exemplary embodiment according to FIG. 10 by providing a further active bearing element 5D, which is mounted so as to be displaceable axially along the longitudinal axis L on the housing 21 and over which the active bearing elements 5A-5C act on the drive shaft 200.
- a further active bearing element 5D which is mounted so as to be displaceable axially along the longitudinal axis L on the housing 21 and over which the active bearing elements 5A-5C act on the drive shaft 200.
- the active bearing elements 5A-5D can perform different functions.
- the active bearing elements 5A-5C serve to adjust the axial play of the drive shaft 200 in a static or quasi-static manner and thus to specify a defined pretensioning of the drive shaft 200 in the axial direction.
- the active bearing element 5D can serve in a dynamic manner in the operation of the drive device 2 and depending on z. B. a dynamic load of the drive shaft 200 to vary the axial play of the drive shaft 200 so that noise attenuated, unbalanced balanced and the overall performance can be influenced.
- the active bearing elements 5A-5D can be of different construction, so that different active bearing elements 5A-5D are combined with each other.
- a drive shaft 200 via active bearing elements 5A-5C, via a coupling element 55 with the End 200A of the drive shaft 200 are in operative connection, actively stored.
- a braking device 8 is provided, which, as described above, via a radial support 85 on the housing 21 guided brake shoes 81, 82 and a lever mechanism 83 has.
- an additional active bearing element 5D is provided, which is designed as an annular sleeve and the other active bearing elements 5A-5C encloses, so that they are arranged in an inner cavity of the additional bearing element 5D.
- the additional active bearing element 5D acts on the levers 831, 832 of the lever mechanism 83 and pivots these about their associated axes of rotation D1, D2, so as to act on the brake shoes 81, 82 for releasing the drive shaft 200.
- FIG. 14 shows an exemplary embodiment of a drive device 2, in which a drive shaft 200 can be detected via a brake device 8 'by means of brake shoes 81', 82 'acting radially on the drive shaft 200.
- the brake shoes 81 ', 82' are biased by springs 84 'relative to the housing 21 in the radial direction and are connected via levers 831', 832 'of a lever operation 83' with an active bearing element 5 'in the form of a piezoelectric element in operative connection.
- the active bearing element 5 ' If the piezoelectrically formed active bearing element 5 'is actuated by applying a voltage, the active bearing element 5' acts on the brake shoes 81 ', 82' via the levers 831 ', 832' and adjusts them radially outward, so that the frictional connection between the brake shoes 81 ', 82' and the drive shaft 200 is canceled and the drive shaft 200 is thus released for smooth operation.
- the levers 831 ', 832' are pivotally mounted on the housing 21 about associated pivot axes D1 ', D2' and are connected at their short ends to the active bearing element 5 'in such a way that by reducing the width of the active bearing element 5' (FIG. transverse to the longitudinal direction L), the brake shoes 81 ', 82' can be pulled away radially from the drive shaft 200.
- the idea underlying the invention is not limited to the above-described embodiments, but can also be realized in fundamentally different embodiments.
- a drive device of the type described here is not limited in particular to use in window regulators on motor vehicle doors, but can be used in any other adjustment devices in a vehicle.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Motor Or Generator Frames (AREA)
- Vehicle Body Suspensions (AREA)
Abstract
Description
Claims
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201280012692.0A CN103534907B (zh) | 2011-03-10 | 2012-03-12 | 具有主动支承的驱动轴的驱动装置 |
| JP2013557134A JP5932849B2 (ja) | 2011-03-10 | 2012-03-12 | アクテイブに支持される駆動軸を有する駆動装置 |
| EP12713897.2A EP2684282A2 (de) | 2011-03-10 | 2012-03-12 | Antriebseinrichtung mit aktiv gelagerter antriebswelle |
| KR1020137026627A KR101649686B1 (ko) | 2011-03-10 | 2012-03-12 | 능동적으로 지지되는 구동축을 갖는 구동 장치 |
| US14/004,108 US9103370B2 (en) | 2011-03-10 | 2012-03-12 | Driving device having an actively supported drive shaft |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102011005360.3 | 2011-03-10 | ||
| DE102011005360A DE102011005360A1 (de) | 2011-03-10 | 2011-03-10 | Antriebseinrichtung mit aktiv gelagerter Antriebswelle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2012120149A2 true WO2012120149A2 (de) | 2012-09-13 |
| WO2012120149A3 WO2012120149A3 (de) | 2013-10-10 |
Family
ID=45953079
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2012/054252 Ceased WO2012120149A2 (de) | 2011-03-10 | 2012-03-12 | Antriebseinrichtung mit aktiv gelagerter antriebswelle |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US9103370B2 (de) |
| EP (1) | EP2684282A2 (de) |
| JP (1) | JP5932849B2 (de) |
| KR (1) | KR101649686B1 (de) |
| CN (1) | CN103534907B (de) |
| DE (1) | DE102011005360A1 (de) |
| WO (1) | WO2012120149A2 (de) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102013102805A1 (de) * | 2013-03-19 | 2014-09-25 | Aker Wirth Gmbh | Kraftdrehkopf für ein Bohrgestänge |
| DE102013207142B4 (de) * | 2013-04-19 | 2014-12-11 | Ford Global Technologies, Llc | Schneckengetriebe |
| DE102016216888A1 (de) * | 2016-09-06 | 2018-03-08 | Brose Fahrzeugteile GmbH & Co. Kommanditgesellschaft, Würzburg | Antriebsvorrichtung für einen Fensterheber, mit einem Lagerelement zum Fixieren eines Stators in einem Gehäuse |
| DE102016011835A1 (de) | 2016-10-01 | 2018-04-05 | Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Bamberg | Verwendung eines Reibdämpfungssystems für Antriebe von Verstelleinrichtungen in Kraftfahrzeugen, insbesondere für Antriebe in Tür und Klappen, sowie Reibdämpfungssystem hierfür |
| DE102016224134A1 (de) * | 2016-12-05 | 2018-06-07 | Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Bamberg | Nebenaggregat eines Kraftfahrzeugs |
| CN111893622A (zh) * | 2020-08-26 | 2020-11-06 | 山东日发纺织机械有限公司 | 一种织机及其定位装置 |
| EP4027498A1 (de) * | 2021-01-11 | 2022-07-13 | ABB Schweiz AG | Elektrische maschine |
| DE102023109034A1 (de) * | 2023-04-11 | 2024-10-17 | Brose Fahrzeugteile Se & Co. Kommanditgesellschaft, Bamberg | Antriebseinheit für ein Verschlusselement eines Kraftfahrzeugs |
| DE102023109614A1 (de) * | 2023-04-17 | 2024-10-17 | Webasto SE | Gehäuseanordnung für einen elektrischen Motor zum Betreiben einer bewegbaren Komponente in einem Fahrzeug |
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-
2012
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- 2012-03-12 EP EP12713897.2A patent/EP2684282A2/de not_active Withdrawn
- 2012-03-12 KR KR1020137026627A patent/KR101649686B1/ko not_active Expired - Fee Related
- 2012-03-12 CN CN201280012692.0A patent/CN103534907B/zh not_active Expired - Fee Related
- 2012-03-12 WO PCT/EP2012/054252 patent/WO2012120149A2/de not_active Ceased
- 2012-03-12 US US14/004,108 patent/US9103370B2/en not_active Expired - Fee Related
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Also Published As
| Publication number | Publication date |
|---|---|
| DE102011005360A1 (de) | 2012-09-13 |
| US20140105524A1 (en) | 2014-04-17 |
| US9103370B2 (en) | 2015-08-11 |
| JP2014510509A (ja) | 2014-04-24 |
| EP2684282A2 (de) | 2014-01-15 |
| WO2012120149A3 (de) | 2013-10-10 |
| KR20140031865A (ko) | 2014-03-13 |
| JP5932849B2 (ja) | 2016-06-08 |
| KR101649686B1 (ko) | 2016-08-19 |
| CN103534907A (zh) | 2014-01-22 |
| CN103534907B (zh) | 2016-08-24 |
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