WO2011092139A1 - Device and method for limiting forces in an adjusting system - Google Patents

Device and method for limiting forces in an adjusting system Download PDF

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Publication number
WO2011092139A1
WO2011092139A1 PCT/EP2011/050907 EP2011050907W WO2011092139A1 WO 2011092139 A1 WO2011092139 A1 WO 2011092139A1 EP 2011050907 W EP2011050907 W EP 2011050907W WO 2011092139 A1 WO2011092139 A1 WO 2011092139A1
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WO
WIPO (PCT)
Prior art keywords
drive element
force
elements
transmission elements
transmission
Prior art date
Application number
PCT/EP2011/050907
Other languages
German (de)
French (fr)
Inventor
Andreas Stock
Jens Schrader
Andrew Pierson
Gilles Peter
Original Assignee
Robert Bosch Gmbh
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2011092139A1 publication Critical patent/WO2011092139A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
    • B60J7/00—Non-fixed roofs; Roofs with movable panels, e.g. rotary sunroofs
    • B60J7/02—Non-fixed roofs; Roofs with movable panels, e.g. rotary sunroofs of sliding type, e.g. comprising guide shoes
    • B60J7/04—Non-fixed roofs; Roofs with movable panels, e.g. rotary sunroofs of sliding type, e.g. comprising guide shoes with rigid plate-like element or elements, e.g. open roofs with harmonica-type folding rigid panels
    • B60J7/057—Driving or actuating arrangements e.g. manually operated levers or knobs
    • B60J7/0573—Driving or actuating arrangements e.g. manually operated levers or knobs power driven arrangements, e.g. electrical
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F11/00—Man-operated mechanisms for operating wings, including those which also operate the fastening
    • E05F11/38—Man-operated mechanisms for operating wings, including those which also operate the fastening for sliding windows, e.g. vehicle windows, to be opened or closed by vertical movement
    • E05F11/42—Man-operated mechanisms for operating wings, including those which also operate the fastening for sliding windows, e.g. vehicle windows, to be opened or closed by vertical movement operated by rack bars and toothed wheels or other push-pull mechanisms
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F15/00—Power-operated mechanisms for wings
    • E05F15/40—Safety devices, e.g. detection of obstructions or end positions
    • E05F15/41—Detection by monitoring transmitted force or torque; Safety couplings with activation dependent upon torque or force, e.g. slip couplings
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F15/00—Power-operated mechanisms for wings
    • E05F15/60—Power-operated mechanisms for wings using electrical actuators
    • E05F15/603—Power-operated mechanisms for wings using electrical actuators using rotary electromotors
    • E05F15/611—Power-operated mechanisms for wings using electrical actuators using rotary electromotors for swinging wings
    • E05F15/616—Power-operated mechanisms for wings using electrical actuators using rotary electromotors for swinging wings operated by push-pull mechanisms
    • E05F15/619—Power-operated mechanisms for wings using electrical actuators using rotary electromotors for swinging wings operated by push-pull mechanisms using flexible or rigid rack-and-pinion arrangements
    • 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
    • F16H—GEARING
    • F16H19/00—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion
    • F16H19/02—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion for interconverting rotary or oscillating motion and reciprocating motion
    • F16H19/04—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion for interconverting rotary or oscillating motion and reciprocating motion comprising a rack
    • 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
    • F16H—GEARING
    • F16H35/00—Gearings or mechanisms with other special functional features
    • F16H35/10—Arrangements or devices for absorbing overload or preventing damage by overload
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F11/00—Man-operated mechanisms for operating wings, including those which also operate the fastening
    • E05F11/38—Man-operated mechanisms for operating wings, including those which also operate the fastening for sliding windows, e.g. vehicle windows, to be opened or closed by vertical movement
    • E05F11/42—Man-operated mechanisms for operating wings, including those which also operate the fastening for sliding windows, e.g. vehicle windows, to be opened or closed by vertical movement operated by rack bars and toothed wheels or other push-pull mechanisms
    • E05F11/423—Man-operated mechanisms for operating wings, including those which also operate the fastening for sliding windows, e.g. vehicle windows, to be opened or closed by vertical movement operated by rack bars and toothed wheels or other push-pull mechanisms for vehicle windows
    • E05F11/426—Flexible rack-and-pinion arrangements
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F15/00—Power-operated mechanisms for wings
    • E05F15/40—Safety devices, e.g. detection of obstructions or end positions
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F15/00—Power-operated mechanisms for wings
    • E05F15/60—Power-operated mechanisms for wings using electrical actuators
    • E05F15/603—Power-operated mechanisms for wings using electrical actuators using rotary electromotors
    • E05F15/632—Power-operated mechanisms for wings using electrical actuators using rotary electromotors for horizontally-sliding wings
    • E05F15/635—Power-operated mechanisms for wings using electrical actuators using rotary electromotors for horizontally-sliding wings operated by push-pull mechanisms, e.g. flexible or rigid rack-and-pinion arrangements
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2201/00—Constructional elements; Accessories therefor
    • E05Y2201/20—Brakes; Disengaging means; Holders; Stops; Valves; Accessories therefor
    • E05Y2201/214—Disengaging means
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2201/00—Constructional elements; Accessories therefor
    • E05Y2201/20—Brakes; Disengaging means; Holders; Stops; Valves; Accessories therefor
    • E05Y2201/23—Actuation thereof
    • E05Y2201/232—Actuation thereof by automatically acting means
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2201/00—Constructional elements; Accessories therefor
    • E05Y2201/60—Suspension or transmission members; Accessories therefor
    • E05Y2201/622—Suspension or transmission members elements
    • E05Y2201/71—Toothed gearing
    • E05Y2201/716—Pinions
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2201/00—Constructional elements; Accessories therefor
    • E05Y2201/60—Suspension or transmission members; Accessories therefor
    • E05Y2201/622—Suspension or transmission members elements
    • E05Y2201/71—Toothed gearing
    • E05Y2201/722—Racks
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2600/00—Mounting or coupling arrangements for elements provided for in this subclass
    • E05Y2600/10—Adjustable
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2900/00—Application of doors, windows, wings or fittings thereof
    • E05Y2900/50—Application of doors, windows, wings or fittings thereof for vehicles
    • E05Y2900/53—Type of wing
    • E05Y2900/55—Windows

Definitions

  • the invention relates to a device and a method for limiting the force in an adjustment system.
  • a motor drive (electric motor) is usually not arranged in the immediate vicinity of a system to be adjusted, to be driven.
  • One of several ways is to use one or more risers as a force transmitting means between the electric motor and the electric sunroof.
  • the risers are driven by a pinion of the electric motor, they run in a guide and can pass adjustment forces in both directions to the remote system.
  • the device according to the invention is provided for limiting the force in an adjustment system and comprises: a rotatable drive element and at least one transmission element which is in contact with the drive element through tooth engagement for transmitting axial forces, the tooth engagements being releasable when a defined force threshold on the transmission elements is exceeded.
  • the device according to the invention has the advantage that in comparison to conventional adjustment systems, a force limiting mechanism acts by which a power flow in the system is interrupted at any time.
  • the power limit is non-destructive, so that parts of the adjustment system can not break or deform plastically.
  • a further preferred embodiment is characterized in that the pressing force can be applied by means of elastic elements.
  • the pressing force can be applied by means of elastic elements.
  • different force thresholds for the device according to the invention can be set with different technical means.
  • a diversification of sizing elements for the force limitation according to the invention is thereby advantageously supported.
  • the elastic elements are designed as springs or as rubber elements. As a result, different elastic elements for applying the pressure force can be selected depending on the design of the adjustment.
  • the device is characterized in that between each one of the elastic elements and one of the transmission elements, a spacer element is arranged.
  • a spacer element is arranged between each one of the elastic elements and one of the transmission elements.
  • a further preferred embodiment provides that the pressure forces applied by the two transmission elements to the drive element are different. As a result, a force limiting behavior for both transmission elements can be designed differently in an advantageous manner.
  • a further preferred embodiment of the invention provides that the drive element as a pinion of a drive motor and the transmission elements are formed as risers, wherein the risers are arranged on radially opposite sides of the pinion and substantially parallel to each other, and wherein slopes of the riser and the sprocket in Essentially match. This makes it possible to use the device according to the invention in conventional adjustment systems with the least possible adaptations.
  • Figure 1 shows a plan view of a first embodiment of the device according to the invention
  • Figure 2 is a perspective view of an arrangement of drive element and two transmission elements
  • FIG. 3 shows an arrangement of a drive element with two êtsele- elements with a force diagram acting therein.
  • FIG. 1 shows in a basic representation a plan view of a first exemplary embodiment of the device according to the invention.
  • a drive device 10 has a rotatable drive element 20 for driving two transmission elements 30.
  • the drive element 20 is preferably designed as a pinion of a self-locking electric geared motor (not shown).
  • the drive member 20 is rotated in corresponding rotation and the two transmission elements 30 move in opposite directions.
  • the drive element 20 can thus by its rotational movement over the two transmission elements 30 axial forces in different directions to an adjusting element of an adjustment (for example, an electric sunroof, not shown) forward.
  • an adjusting element of an adjustment for example, an electric sunroof, not shown
  • the transmission elements 30 are preferably designed as risers, which are in meshing engagement with the drive element 20, wherein gradients of the transmission elements 30 and the drive element 20 substantially coincide. Both transmission elements 30 are preferably arranged substantially parallel and radially opposite to the drive element 20. Each of the transmission elements 30 is pressed radially against the drive element 20 by means of elastic elements 40. Between the elastic elements 40 and each of the transmission elements 30, a spacer element 50 is preferably arranged, by means of which a friction and / or low-noise relative movement between the transmission elements 30 and the drive element 20 is made possible.
  • the spacer element 50 may be formed, for example, as a clamping plate.
  • the elastic elements 40 are preferably configured in such a way. suggests that they yield enough to release the meshing engagement between the transmission elements 30 and the drive element 20 when a defined force threshold on the transmission elements 30 is exceeded. Below this force threshold, the meshing engagement is intact and the transmission element 30 can not move, since the geared motor is self-locking. This mechanism of action will be explained in more detail with reference to FIG.
  • FIG. 2 shows a perspective view of an arrangement consisting of the drive element 20 and the two transmission elements 30. From the figure, the meshing engagement between the drive element 20 and the two transmission elements 30 in the normal operating case of the drive device 30 is illustrated even better.
  • FIG. 3 shows a principal force diagram with forces which act in an arrangement of a drive element 20 and two transmission elements 30.
  • An axially acting in the x direction on the transmission element 30 force Fx generates a directed away from the drive element 20 radial force Fy, which is dependent on a pitch angle at an interface between the transmission element 30 and the drive member 20.
  • the force Fx comes in the normal operating case of a Rotation of the transmission element 20, which is caused by driving by means of a motor with the drive torque MA, wherein the rotation is transmitted by the meshing engagement between the drive element 20 and the transmission element 30 as an axial force to the transmission element 30.
  • the force Fx on the transmission element 30 can also originate from external forces resulting from material deformations, such as occur in accident situations.
  • the force Fx acts on the transmission element 30 from the remote system to be adjusted or in some other way towards the drive device 10 with the geared motor. Since the drive element 20 is fixed due to the self-locking of the motor, the transmission element 30 can only move radially against the drive element 20 radially executed spring force Feder of the elastic member 40 radially away from the drive member 20 when the force Fy exceeds the spring force Feder.
  • the solution of the meshing engagement between the transmission The transmission element 30 and the drive element 20 is the result of this Wegbearguess.
  • the elastic properties of the elastic elements 40 thus determine with the force FFeder those force ratios in which the meshing engagement between the transmission element 30 and the drive element 20 is eliminated and an axial movement of the transmission element 30 on the stationary drive element 20 is allowed past. If the two transmission elements 30 are loaded with differently sized axial forces, the system allows a movement of that transmission element 30 which is loaded above the specified force threshold. The other transmission element 30, which is loaded below the defined force threshold, reacts to it completely independently and remains in its fixed position relative to the drive element 20. As soon as the force is again below the predefined force threshold with fluctuating force intensities, there is no
  • a modification of the invention can even be implemented entirely without separate elastic elements 40.
  • the transmission member 30 itself is used as a force-transmitting elastic member by being bent and thereby having a certain radius of curvature.
  • the transmission element 30 thus formed is supported against the drive element 20 by a support force which is dependent on the bending radius of the transmission element 30.
  • the desired force threshold for limiting the force of the device according to the invention can be achieved in a simple manner become.
  • a very compact, flexible and cost-effective solution for an axial force limitation for risers in a drive device for an adjustment system is proposed.
  • a uniform force threshold or different force thresholds can be dimensioned for both risers or for each of the two risers.
  • the axially acting forces of the two ascending spirals can thus be limited independently of one another to specific values and, if required, to different values.
  • the force limiting mechanism is advantageous regardless of whether the causative force from the drive motor, from the remote system to be adjusted or otherwise to the drive means 10 with the transmission elements 30 acts.
  • the device according to the invention can be used in this way as a safety actuator for different adjustment systems, the application disclosed here for an electric sunroof is therefore to be considered as exemplary only.
  • occupant protection in the motor vehicle area can be increased by using the undamaged and exposed transmission elements 30 of the device according to the invention in the event of an accident in order to stabilize a position of injured occupants within the vehicle.
  • an emergency functionality of the transmission elements 30 is achieved, which is not provided in the normal operating behavior.
  • a risk of injury to occupants as a result of force peaks broken material parts can be avoided. Which he- In this way, finding can make an important contribution to increased occupant safety in the motor vehicle sector.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gear Transmission (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

The invention relates to a device for limiting forces in an adjusting system, comprising a rotatable drive element and two transmission elements for transmitting axial forces which transmission elements are in contact with the drive element by meshing engagement. The device is characterized in that the meshing engagement can be released when a defined threshold of forces acting upon the transmission elements is exceeded.

Description

Beschreibung  description
Titel title
Vorrichtung und Verfahren zur Kraftbegrenzung in einem Verstellsvstem  Device and method for force limitation in a Verstellsvstem
Die Erfindung betrifft eine Vorrichtung und ein Verfahren zur Kraftbegrenzung in einem Verstellsystem. The invention relates to a device and a method for limiting the force in an adjustment system.
Stand der Technik State of the art
Technische Verstellsysteme wie beispielsweise ein elektrisches Schiebedach eines Kraftfahrzeugs werden üblicherweise mittels einer Versteileinrichtung linear verstellt. Zu diesem Zweck ist ein motorischer Antrieb (Elektromotor) in der Regel nicht in unmittelbarer Nähe von einem zu verstellenden, anzutreibenden System angeordnet. Eine von mehreren Möglichkeiten besteht in einer Verwendung einer oder mehrerer Steigwendeln als kraftübertragendem Mittel zwischen dem Elektromotor und dem elektrischen Schiebedach. Die Steigwendeln werden von einem Ritzel des Elektromotors angetrieben, sie laufen dabei in einer Führung und können Verstellkräfte in beiden Laufrichtungen an das ferne System weiterleiten. Technical adjustment systems such as an electric sunroof of a motor vehicle are usually adjusted linearly by means of an adjusting device. For this purpose, a motor drive (electric motor) is usually not arranged in the immediate vicinity of a system to be adjusted, to be driven. One of several ways is to use one or more risers as a force transmitting means between the electric motor and the electric sunroof. The risers are driven by a pinion of the electric motor, they run in a guide and can pass adjustment forces in both directions to the remote system.
Als nachteilig bei derartigen herkömmlichen Systemen hat sich herausgestellt, dass im Falle eines Unfalls des Kraftfahrzeugs und der damit verbundenen Mate- rialdeformierungen aufgrund von systembedingten Starrheiten des Verstellsystems Kräfte unkontrolliert wirken können. Diese können zu Materialbrüchen aufgrund unterbrochener Kraftflüsse führen, die Fahrzeuginsassen verletzen können. A disadvantage of such conventional systems has been found that in the event of an accident of the motor vehicle and the associated material deformations due to system-related rigidities of the adjustment forces can act uncontrollably. These can lead to material breaks due to interrupted power flows that can injure vehicle occupants.
Es ist die daher die Aufgabe der Erfindung einen verbesserten Aktuator für ein Verstellsystem bereitzustellen. Offenbarung der Erfindung It is therefore the object of the invention to provide an improved actuator for an adjustment system. Disclosure of the invention
Die erfindungsgemäße Vorrichtung ist zu einer Kraftbegrenzung in einem Verstellsystem vorgesehen und umfasst: ein rotierbares Antriebselement und wenigstens ein mit dem Antriebselement durch Verzahnungseingriffe in Kontakt stehendes Übertragungselement zum Übertragen von Axialkräften, wobei bei Überschreiten einer definierten Kraftschwelle auf die Übertragungs-elemente die Verzahnungseingriffe lösbar sind. The device according to the invention is provided for limiting the force in an adjustment system and comprises: a rotatable drive element and at least one transmission element which is in contact with the drive element through tooth engagement for transmitting axial forces, the tooth engagements being releasable when a defined force threshold on the transmission elements is exceeded.
Dies wird dadurch erreicht, dass Mittel vorgesehen sind, die eine Andruckkraft auf das Übertragungselement in Richtung auf das Antriebselement aufbringen. Dadurch lassen sich unterschiedliche, vordefinierte Kraftschwellen einstellen, die als Auslöse-schwellen für das Wirksamwerden des Kraftbegrenzungsmechanis- mus der erfindungsgemäßen Vorrichtung dienen. This is achieved in that means are provided which apply a pressing force on the transmission element in the direction of the drive element. As a result, different predefined force thresholds can be set which serve as triggering thresholds for the force limitation mechanism of the device according to the invention to take effect.
Die erfindungsgemäße Vorrichtung bietet den Vorteil, dass im Vergleich zu herkömmlichen Verstellsystemen ein Kraftbegrenzungsmechanismus wirkt, durch den ein Kraftfluss im System zu keiner Zeit unterbrochen ist. Die Kraftbegren- zung ist nicht zerstörend, wodurch Teile des Verstellsystems nicht brechen oder sich plastisch verformen können. The device according to the invention has the advantage that in comparison to conventional adjustment systems, a force limiting mechanism acts by which a power flow in the system is interrupted at any time. The power limit is non-destructive, so that parts of the adjustment system can not break or deform plastically.
Gemäß einer weiteren bevorzugten Ausführungsform ist die Vorrichtung dadurch gekennzeichnet, dass die Andruckkraft mittels gekrümmter Übertragungselemen- te, die gegen das Antriebselement drücken, aufgebracht wird. Auf diese Weise ist die erfindungsgemäße Kraftbegrenzung im Verstellsystem vorteilhaft ohne zusätzliche separate Kraftübertragungselemente erreichbar. According to a further preferred embodiment, the device is characterized in that the pressure force is applied by means of curved transmission elements which press against the drive element. In this way, the force limitation according to the invention in the adjustment system is advantageously achievable without additional separate power transmission elements.
Eine weitere bevorzugte Ausführungsform ist dadurch gekennzeichnet, dass die Andruckkraft mittels elastischer Elemente aufgebracht werden kann. Dadurch lassen sich mit unterschiedlichen technischen Mitteln unterschiedliche Kraftschwellen für die erfindungsgemäße Vorrichtung einstellen. Eine Diversifizierung von Dimensionierungselementen für die erfindungsgemäße Kraftbegrenzung ist dadurch vorteilhaft unterstützt. Gemäß einer weiteren bevorzugten Ausführungsform ist vorgesehen, dass die elastischen Elemente als Federn oder als Gummielemente ausgebildet sind. Dadurch können je nach Bauart des Verstellsystems unterschiedliche elastische Elemente zum Aufbringen der Andruckkraft gewählt werden. A further preferred embodiment is characterized in that the pressing force can be applied by means of elastic elements. As a result, different force thresholds for the device according to the invention can be set with different technical means. A diversification of sizing elements for the force limitation according to the invention is thereby advantageously supported. According to a further preferred embodiment, it is provided that the elastic elements are designed as springs or as rubber elements. As a result, different elastic elements for applying the pressure force can be selected depending on the design of the adjustment.
Gemäß einer weiteren bevorzugten Ausführungsform ist die Vorrichtung dadurch gekennzeichnet, dass zwischen jeweils einem der elastischen Elemente und einem der Übertragungselemente ein Distanzelement angeordnet ist. Dadurch wird vorteilhaft eine reibungs- und/oder geräuscharme relative Bewegung zwischen Übertragungselement und Antriebsmotor erreicht. Außerdem wird durch das Distanzelement die von den elastischen Elementen auf die Übertragungselemente aufgebrachte Andruckkraft vergleichmäßigt. According to a further preferred embodiment, the device is characterized in that between each one of the elastic elements and one of the transmission elements, a spacer element is arranged. As a result, a low-friction and / or low-noise relative movement between the transmission element and the drive motor is advantageously achieved. In addition, the force exerted by the elastic elements on the transmission elements pressing force is equalized by the spacer element.
Eine weitere bevorzugte Ausführungsform sieht vor, dass die von den beiden Übertragungs-elementen auf das Antriebselement aufgebrachten Andruckkräfte unterschiedlich groß sind. Dadurch kann ein Kraftbegrenzungsverhalten für beide Übertragungselemente in vorteilhafter Weise unterschiedlich ausgestaltet werden. Eine weitere bevorzugte Ausgestaltung der Erfindung sieht vor, dass das Antriebselement als Ritzel eines Antriebsmotors und die Übertragungselemente als Steigwendeln ausgebildet sind, wobei die Steigwendeln auf radial gegenüberliegenden Seiten des Ritzels und im Wesentlichen parallel zueinander angeordnet sind, und wobei Steigungen der Steigwendeln und des Ritzels im Wesentlichen übereinstimmen. Dadurch ist ein Einsatz der erfindungsgemäßen Vorrichtung in herkömmlichen Verstellsystemen mit geringstmöglichen Adaptierungen möglich. A further preferred embodiment provides that the pressure forces applied by the two transmission elements to the drive element are different. As a result, a force limiting behavior for both transmission elements can be designed differently in an advantageous manner. A further preferred embodiment of the invention provides that the drive element as a pinion of a drive motor and the transmission elements are formed as risers, wherein the risers are arranged on radially opposite sides of the pinion and substantially parallel to each other, and wherein slopes of the riser and the sprocket in Essentially match. This makes it possible to use the device according to the invention in conventional adjustment systems with the least possible adaptations.
Kurze Beschreibung der Zeichnungen Die Erfindung wird im Folgenden anhand von Figuren kurz beschrieben. Dabei zeigt: Brief Description of the Drawings The invention will be briefly described below with reference to figures. Showing:
Figur 1 eine Draufsicht auf ein erstes Ausführungsbeispiel der erfindungsgemäßen Vorrichtung, Figur 2 eine perspektivische Ansicht einer Anordnung aus Antriebselement und zwei Übertragungselementen, und 1 shows a plan view of a first embodiment of the device according to the invention, Figure 2 is a perspective view of an arrangement of drive element and two transmission elements, and
Figur 3 eine Anordnung aus einem Antriebselement mit zwei Übertragungsele- menten mit einem darin wirkenden Kraftdiagramm. 3 shows an arrangement of a drive element with two Übertragungsele- elements with a force diagram acting therein.
Ausführungsform(en) der Erfindung Embodiment (s) of the invention
Figur 1 zeigt in einer prinzipiellen Darstellung eine Draufsicht auf ein erstes Ausführungsbeispiel der erfindungsgemäßen Vorrichtung. Eine Antriebseinrichtung 10 weist ein rotierbares Antriebselement 20 zum Antreiben von zwei Übertragungselementen 30 auf. Das Antriebselement 20 ist vorzugsweise als Ritzel eines selbsthemmenden elektrischen Getriebemotors (nicht dargestellt) ausgebildet. Wenn der Getriebemotor mit elektrischer Spannung versorgt wird, wird das Antriebselement 20 in entsprechende Drehung versetzt und die beiden Übertragungselemente 30 bewegen sich in jeweils gegenläufige Richtungen. Das Antriebselement 20 kann somit durch seine Drehbewegung über die beiden Übertragungselemente 30 Axialkräfte in unterschiedliche Richtungen an ein zu verstellendes Element eines Verstellsystems (beispielsweise ein elektrisches Schiebedach, nicht dargestellt) weiterleiten. Wenn der Motor nicht mit elektrischer Spannung versorgt wird, ist es selbst bei Einleitung sehr hoher Kräfte auf die Übertragungselemente 30 aufgrund der Selbsthemmung des Motors nicht möglich, diesen in Bewegung zu setzen. Die Übertragungselemente 30 sind vorzugsweise als Steigwendeln ausgebildet, die mit dem Antriebselement 20 in einem Verzahnungseingriff stehen, wobei Steigungen der Übertragungselemente 30 und des Antriebselements 20 im Wesentlichen übereinstimmen. Beide Übertragungselemente 30 sind vorzugsweise im Wesentlichen parallel und radial gegenüberliegend am Antriebselement 20 angeordnet. Jedes der Übertragungselemente 30 wird mittels elastischer Elemente 40 radial gegen das Antriebselement 20 gedrückt. Zwischen den elastischen Elementen 40 und jedem der Übertragungselemente 30 ist vorzugsweise ein Distanzelement 50 angeordnet, mit dessen Hilfe eine reibungs- und/oder geräuscharme relative Bewegung zwischen den Übertragungselementen 30 und dem Antriebselement 20 ermöglicht wird. Das Distanzelement 50 kann beispielsweise als Klemm-platte ausgebildet sein. Die elastischen Elemente 40 sind vorzugsweise derart ausge- legt, dass sie genügend nachgeben, um den Verzahnungseingriff zwischen den Übertragungselementen 30 und dem Antriebselement 20 zu lösen, wenn eine definierte Kraftschwelle auf die Übertragungselemente 30 überschritten wird. Unterhalb dieser Kraftschwelle ist der Verzahnungseingriff intakt und das Übertra- gungselement 30 kann sich nicht bewegen, da der Getriebemotor selbsthemmend ist. Dieser Wirkmechanismus wird anhand von Figur 3 näher erläutert. FIG. 1 shows in a basic representation a plan view of a first exemplary embodiment of the device according to the invention. A drive device 10 has a rotatable drive element 20 for driving two transmission elements 30. The drive element 20 is preferably designed as a pinion of a self-locking electric geared motor (not shown). When the geared motor is supplied with electrical power, the drive member 20 is rotated in corresponding rotation and the two transmission elements 30 move in opposite directions. The drive element 20 can thus by its rotational movement over the two transmission elements 30 axial forces in different directions to an adjusting element of an adjustment (for example, an electric sunroof, not shown) forward. If the motor is not supplied with electrical power, it is not possible even to initiate very high forces on the transmission elements 30 due to the self-locking of the motor to set this in motion. The transmission elements 30 are preferably designed as risers, which are in meshing engagement with the drive element 20, wherein gradients of the transmission elements 30 and the drive element 20 substantially coincide. Both transmission elements 30 are preferably arranged substantially parallel and radially opposite to the drive element 20. Each of the transmission elements 30 is pressed radially against the drive element 20 by means of elastic elements 40. Between the elastic elements 40 and each of the transmission elements 30, a spacer element 50 is preferably arranged, by means of which a friction and / or low-noise relative movement between the transmission elements 30 and the drive element 20 is made possible. The spacer element 50 may be formed, for example, as a clamping plate. The elastic elements 40 are preferably configured in such a way. suggests that they yield enough to release the meshing engagement between the transmission elements 30 and the drive element 20 when a defined force threshold on the transmission elements 30 is exceeded. Below this force threshold, the meshing engagement is intact and the transmission element 30 can not move, since the geared motor is self-locking. This mechanism of action will be explained in more detail with reference to FIG.
Figur 2 zeigt eine perspektivische Ansicht einer Anordnung bestehend aus dem Antriebselement 20 und den zwei Übertragungselementen 30. Aus der Figur wird der im normalen Betriebsfall der Antriebseinrichtung 10 bestehende Verzahnungseingriff zwischen dem Antriebselement 20 und den beiden Übertragungselementen 30 noch besser verdeutlicht. FIG. 2 shows a perspective view of an arrangement consisting of the drive element 20 and the two transmission elements 30. From the figure, the meshing engagement between the drive element 20 and the two transmission elements 30 in the normal operating case of the drive device 30 is illustrated even better.
Figur 3 zeigt ein prinzipielles Kraftdiagramm mit Kräften, die in einer Anordnung aus einem Antriebselement 20 und zwei Übertragungselementen 30 wirken. Eine axial in x-Richtung auf das Übertragungselement 30 wirkende Kraft Fx erzeugt eine vom Antriebselement 20 weggerichtete radiale Kraft Fy, die abhängig ist von einem Steigungswinkel an einer Schnittstelle zwischen dem Übertragungselement 30 und dem Antriebselement 20. Die Kraft Fx stammt im normalen Betriebsfall aus einer Drehung des Übertragungselements 20, die durch ein Antreiben mittels Motor mit dem Antriebsmoment MAntrieb verursacht wird, wobei die Drehung durch den Verzahnungseingriff zwischen dem Antriebselement 20 und dem Übertragungselement 30 als Axialkraft an das Übertragungselement 30 weitergegeben wird. FIG. 3 shows a principal force diagram with forces which act in an arrangement of a drive element 20 and two transmission elements 30. An axially acting in the x direction on the transmission element 30 force Fx generates a directed away from the drive element 20 radial force Fy, which is dependent on a pitch angle at an interface between the transmission element 30 and the drive member 20. The force Fx comes in the normal operating case of a Rotation of the transmission element 20, which is caused by driving by means of a motor with the drive torque MA, wherein the rotation is transmitted by the meshing engagement between the drive element 20 and the transmission element 30 as an axial force to the transmission element 30.
Die Kraft Fx auf das Übertragungselement 30 kann aber auch aus externen Kräften, resultierend aus Materialdeformierungen, wie sie beispielsweise in Unfallsituationen entstehen, stammen. In diesem Fall wirkt die Kraft Fx vom fernen, zu verstellenden System oder in einer anderen Weise auf die Übertragungselemente 30 eingeleitet in Richtung auf die Antriebseinrichtung 10 mit dem Getriebemotor. Da das Antriebselement 20 aufgrund der Selbsthemmung des Motors fest ist, kann sich das Übertragungselement 30 nur dann gegen eine auf das Antriebselement 20 radial hingerichtete Federkraft FFeder des elastischen Elements 40 radial vom Antriebselement 20 wegbewegen, wenn die Kraft Fy die Federkraft FFeder übersteigt. Die Lösung des Verzahnungseingriffs zwischen dem Übertra- gungselement 30 und dem Antriebselement 20 ist das Ergebnis dieses Wegbewegens. However, the force Fx on the transmission element 30 can also originate from external forces resulting from material deformations, such as occur in accident situations. In this case, the force Fx acts on the transmission element 30 from the remote system to be adjusted or in some other way towards the drive device 10 with the geared motor. Since the drive element 20 is fixed due to the self-locking of the motor, the transmission element 30 can only move radially against the drive element 20 radially executed spring force Feder of the elastic member 40 radially away from the drive member 20 when the force Fy exceeds the spring force Feder. The solution of the meshing engagement between the transmission The transmission element 30 and the drive element 20 is the result of this Wegbewegens.
Die elastischen Eigenschaften der elastischen Elemente 40 (beispielsweise die Federkonstanten) bestimmen also mit der Kraft FFeder diejenigen Kraftverhältnisse, bei denen der Verzahnungseingriff zwischen dem Übertragungselement 30 und dem Antriebselement 20 beseitigt und eine axiale Bewegung des Übertragungselements 30 am stehenden Antriebselement 20 vorbei ermöglicht ist. Falls die beiden Übertragungselemente 30 mit unterschiedlich großen Axialkräf- ten belastet werden, erlaubt das System eine Bewegung desjenigen Übertragungselements 30, welches oberhalb der festgelegten Kraftschwelle belastet wird. Das andere Übertragungselement 30, das unterhalb der definierten Kraftschwelle belastet wird, reagiert davon völlig unabhängig und bleibt in seiner festen Position relativ zum Antriebselement 20. Sobald die Kraft bei schwankenden Kraftintensitäten wieder unterhalb der vordefinierten Kraftschwelle liegt, ist keineThe elastic properties of the elastic elements 40 (for example, the spring constants) thus determine with the force FFeder those force ratios in which the meshing engagement between the transmission element 30 and the drive element 20 is eliminated and an axial movement of the transmission element 30 on the stationary drive element 20 is allowed past. If the two transmission elements 30 are loaded with differently sized axial forces, the system allows a movement of that transmission element 30 which is loaded above the specified force threshold. The other transmission element 30, which is loaded below the defined force threshold, reacts to it completely independently and remains in its fixed position relative to the drive element 20. As soon as the force is again below the predefined force threshold with fluctuating force intensities, there is no
Relativbewegung zwischen dem Antriebselement 20 und dem Übertragungselement 30 mehr möglich, weil die Selbsthemmung des Elektromotors eine Bewegung des Übertragungselements 30 verhindert. Aus Figur 3 wird also deutlich, dass für den Fall, dass die Kraft Fy die Federkraft FFeder übersteigt, der Ver- zahnungseingriff zwischen dem Übertragungselement 30 und dem Antriebselement 20 gelöst wird. Durch das Bewegen des Übertragungselements 30 am stehenden Antriebselement 20 vorbei kann also überschüssige Energie im System abgebaut werden. Mitentscheidend, ob bzw. welches der Übertragungselemente 30 aus dem Verzahnungseingriff mit dem Antriebselement 20 gelöst wird, ist aufgrund der geometrischen Winkelverhältnisse zwischen Antriebselement 20 und Übertragungselement 30 auch eine Richtung der auf das Übertragungselement 30 wirkenden Axialkraft. Obwohl in Figur 3 nur Kraftverhältnisse für das obere Übertragungs- element 30 dargestellt ist, ist es selbstverständlich, dass diese in analoger Weise ebenso für das untere Übertragungselement 30 gelten. Relative movement between the drive element 20 and the transmission element 30 more possible because the self-locking of the electric motor prevents movement of the transmission element 30. It is therefore clear from FIG. 3 that, in the event that the force Fy exceeds the spring force F spring, the gear engagement between the transmission element 30 and the drive element 20 is released. By moving the transmission element 30 past the stationary drive element 20, therefore, excess energy can be dissipated in the system. Mitentscheidend whether or which of the transmission elements 30 is released from the meshing engagement with the drive element 20, due to the geometric angular relationships between the drive element 20 and transmission element 30 is also a direction of the force acting on the transmission element 30 axial force. Although only force relationships for the upper transmission element 30 are shown in FIG. 3, it goes without saying that they also apply analogously to the lower transmission element 30.
Für die Kraftaufbringung auf die Übertragungselemente 30 können unterschiedliche elastische Elemente 40 verwendet werden, um auf diese Weise unterschied- liehe Kraftbegrenzungs-eigenschaften des Verstellsystems mit unterschiedlichenFor the application of force to the transmission elements 30, different elastic elements 40 can be used in order in this way different Liehe power limiting properties of the adjustment system with different
Kraftschwellen zu erreichen. Denkbar sind beispielsweise Elemente aus Gummi oder alternativ aus sonstigen Materialien gefertigte Elemente mit günstigen elastischen Eigenschaften. Achieve thresholds. For example, elements made of rubber are conceivable or alternatively made of other materials elements with favorable elastic properties.
Eine Abwandlung der Erfindung ist sogar gänzlich ohne separate elastische Ele- mente 40 realisierbar. In diesem Fall wird das Übertragungselement 30 selbst als kraftübertragendes, elastisches Element benutzt, indem es gebogen bzw. verformt und dadurch einen bestimmten Krümmungsradius aufweist. Das derart geformte Übertragungselement 30 stützt sich in diesem Fall mit einer Stützkraft, die abhängig ist vom Biegeradius des Übertragungselements 30, gegen das An- triebselement 20. Durch geeignete Auswahl des Krümmungsradius kann so auf einfache Weise die gewünschte Kraftschwelle für die Kraftbegrenzung der erfindungsgemäßen Vorrichtung erreicht werden. A modification of the invention can even be implemented entirely without separate elastic elements 40. In this case, the transmission member 30 itself is used as a force-transmitting elastic member by being bent and thereby having a certain radius of curvature. In this case, the transmission element 30 thus formed is supported against the drive element 20 by a support force which is dependent on the bending radius of the transmission element 30. By suitably selecting the radius of curvature, the desired force threshold for limiting the force of the device according to the invention can be achieved in a simple manner become.
Erfindungsgemäß wird eine sehr kompakte, flexible und kostengünstige Lösung für eine Axialkraftbegrenzung für Steigwendeln in einer Antriebseinrichtung für ein Verstellsystem vorgeschlagen. Auf einfache Weise kann für beide Steigwendeln eine einheitliche Kraftschwelle oder für jede der beiden Steigwendeln unterschiedliche Kraftschwellen dimensioniert werden. Die axial wirkenden Kräfte der beiden Steigwendeln können so unabhängig voneinander auf bestimmte, bei Be- darf unterschiedliche Werte begrenzt werden. Der Kraftbegrenzungsmechanismus ist vorteilhaft unabhängig davon, ob die verursachende Kraft vom Antriebsmotor, vom fernen zu verstellenden System oder sonstwie auf die Antriebseinrichtung 10 mit den Übertragungselementen 30 einwirkt. Vorteilhaft kann die erfindungsgemäße Vorrichtung auf diese Art und Weise als Sicherheitsaktuator für unterschiedliche Verstellsysteme verwendet werden, die hier offenbarte Anwendung für ein elektrisches Schiebedach ist somit lediglich als beispielhaft anzusehen. According to the invention, a very compact, flexible and cost-effective solution for an axial force limitation for risers in a drive device for an adjustment system is proposed. In a simple way, a uniform force threshold or different force thresholds can be dimensioned for both risers or for each of the two risers. The axially acting forces of the two ascending spirals can thus be limited independently of one another to specific values and, if required, to different values. The force limiting mechanism is advantageous regardless of whether the causative force from the drive motor, from the remote system to be adjusted or otherwise to the drive means 10 with the transmission elements 30 acts. Advantageously, the device according to the invention can be used in this way as a safety actuator for different adjustment systems, the application disclosed here for an electric sunroof is therefore to be considered as exemplary only.
Vorteilhaft kann mittels der Erfindung ein Insassenschutz im Kfz-Bereich dadurch gesteigert werden, dass im Falle eines Unfalls die unbeschädigten und freiliegenden Übertragungselemente 30 der erfindungsgemäßen Vorrichtung benutzt werden, um eine Lage von verunfallten Insassen innerhalb des Kfz zu stabilisieren. Auf diese Weise wird eine Notfall-Funktionalität der Übertragungselemente 30 erreicht, die im normalen Betriebsverhalten nicht vorgesehen ist. Ferner kann mittels der erfindungsgemäßen Vorrichtung eine Verletzungsgefahr von Insassen infolge durch Kraftspitzen gebrochener Materialteile vermieden werden. Die Er- findung kann auf diese Weise einen wichtigen Beitrag zur erhöhten Insassensicherheit im Kfz-Bereich leisten. Advantageously, by means of the invention occupant protection in the motor vehicle area can be increased by using the undamaged and exposed transmission elements 30 of the device according to the invention in the event of an accident in order to stabilize a position of injured occupants within the vehicle. In this way, an emergency functionality of the transmission elements 30 is achieved, which is not provided in the normal operating behavior. Furthermore, by means of the device according to the invention a risk of injury to occupants as a result of force peaks broken material parts can be avoided. Which he- In this way, finding can make an important contribution to increased occupant safety in the motor vehicle sector.
Im Lichte der obigen Erläuterungen versteht es sich von selbst, dass die Ausfüh- rung der Erfindung nicht auf das in den Figuren dargestellten Beispiel beschränkt ist, sondern ebenso in einer Vielzahl von Abwandlungen möglich ist, die im Rahmen fachmännischen Handelns liegen. In light of the above explanations, it goes without saying that the embodiment of the invention is not limited to the example shown in the figures, but is also possible in a variety of modifications which are within the purview of the skilled person.

Claims

Patentansprüche claims
Vorrichtung zur Kraftbegrenzung in einem Verstellsystem, umfassend: Device for force limitation in an adjustment system, comprising:
- ein rotierbares Antriebselement (20), und  - A rotatable drive element (20), and
- wenigstens ein mit dem Antriebselement (20) durch Verzahnungseingriff in Kontakt stehendes Übertragungselement (30) zum Übertragen von Axialkräften,  at least one transmission element (30), which is in contact with the drive element (20) by tooth engagement, for transmitting axial forces,
dadurch gekennzeichnet, dass Mittel vorgesehen sind, die eine Andruckkraft auf die Übertragungselemente (30) in Richtung auf das Antriebselement (20) aufbringen, und dass bei Überschreiten einer definierten Kraftschwelle auf die Übertragungselemente (30) der Verzahnungseingriff lösbar ist.  characterized in that means are provided which apply a pressure force on the transmission elements (30) in the direction of the drive element (20), and that when a defined force threshold on the transmission elements (30) of the meshing engagement is solvable.
Vorrichtung nach Anspruch 1 , dadurch gekennzeichnet, dass die Andruckkraft mittels gekrümmt ausgestalteter Übertragungselemente (30), die gegen das Antriebselement (20) drücken, aufgebracht werden kann. Apparatus according to claim 1, characterized in that the pressing force by means of curved ausgestalteter transmission elements (30) which press against the drive element (20) can be applied.
Vorrichtung nach Anspruch 1 , dadurch gekennzeichnet, dass die Andruckkraft mittels elastischer Elemente (40) aufgebracht werden kann. Apparatus according to claim 1, characterized in that the pressing force by means of elastic elements (40) can be applied.
Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, dass die elastischen Elemente (40) als Federn oder als Gummielemente ausgebildet sind. Apparatus according to claim 3, characterized in that the elastic elements (40) are formed as springs or as rubber elements.
Vorrichtung nach einem der Ansprüche 3 oder 4, dadurch gekennzeichnet, dass zwischen jeweils einem der elastischen Elemente (40) und einem der Übertragungselemente (30) ein Distanzelement (50) angeordnet ist. Device according to one of claims 3 or 4, characterized in that between each one of the elastic elements (40) and one of the transmission elements (30), a spacer element (50) is arranged.
Vorrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die von den beiden Übertragungselementen (30) auf das Antriebselement (20) aufgebrachten Andruckkräfte unterschiedlich groß sind. Device according to one of claims 1 to 5, characterized in that the of the two transmission elements (30) on the drive element (20) applied pressure forces are different.
7. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Antriebselement (20) als Ritzel eines Antriebsmotors und die Übertragungselemente (30) als Steigwendeln ausgebildet sind, wobei die Steigwendeln auf radial gegenüberliegenden Seiten des Ritzels und im Wesentlichen parallel zueinander angeordnet sind, und wobei Steigungen der Steigwendeln und des Ritzels im Wesentlichen übereinstimmen. 7. Device according to one of the preceding claims, characterized in that the drive element (20) as a pinion of a drive motor and the transfer elements (30) are formed as risers, wherein the risers are arranged on radially opposite sides of the pinion and substantially parallel to each other, and wherein slopes of the riser and the sprocket substantially coincide.
8. Vorrichtung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Vorrichtung zur Stabilisierung von Insassen eines Fahrzeugs im Crashfall vorgesehen ist. 8. Device according to one of claims 1 to 7, characterized in that the device is provided for stabilizing occupants of a vehicle in the event of a crash.
9. Verfahren zur Kraftbegrenzung in einem Verstellsystem mit einem rotierbaren9. Method for limiting the force in an adjustment system with a rotatable
Antriebselement (20) und zwei Übertragungselementen (30) zum Übertragen von Axialkräften, wobei die Übertragungselemente (30) mit dem Antriebselement (20) durch Verzahnungseingriffe in Kontakt stehen, umfassend die Schritte: Drive element (20) and two transmission elements (30) for transmitting axial forces, wherein the transmission elements (30) are in contact with the drive element (20) by tooth engagements, comprising the steps:
- Aufbringen einer Andruckkraft von den Übertragungselementen (30) auf das - Applying a pressing force from the transmission elements (30) on the
Antriebselement (20), und Drive element (20), and
- Lösen der Verzahnungseingriffe für einen Fall, dass eine definierte Kraftschwelle auf die Übertragungselemente (30) überschritten wird.  - Release the teeth interventions for a case that a defined force threshold is exceeded on the transmission elements (30).
10. Verfahren nach Anspruch 9, wobei die auf das Antriebselement (20) aufgebrachten Andruckkräfte unterschiedlich groß sind. 10. The method of claim 9, wherein the force applied to the drive element (20) pressure forces are different.
1 1 . Verstellsystem mit einer Vorrichtung nach einem der Ansprüche 1 bis 8, in dem ein Verfahren nach Anspruch 9 oder 10 ausführbar ist. 1 1. Adjusting system with a device according to one of claims 1 to 8, in which a method according to claim 9 or 10 is executable.
PCT/EP2011/050907 2010-01-29 2011-01-24 Device and method for limiting forces in an adjusting system WO2011092139A1 (en)

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DE102013200359A1 (en) * 2013-01-14 2014-07-31 Robert Bosch Gmbh Gear box drive unit for sliding roof in motor car, has counter gear tooth portion and gear unit that are shifted together during the movement of transmission element which is provided in active connection with support element

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FR2819848A1 (en) * 2001-01-24 2002-07-26 Meritor Light Vehicle Sys Ltd Cable actuator for motor vehicle has electric motor and rack cable with external thread engaged by drive worm on motor
US20080163553A1 (en) * 2007-01-09 2008-07-10 Yu-Tsun Liao Control Device for Controlling Opening and Closing of a Window

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