EP2226453B1 - Spindle drive for a mobile element of a motor vehicle - Google Patents

Spindle drive for a mobile element of a motor vehicle Download PDF

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Publication number
EP2226453B1
EP2226453B1 EP10001968.6A EP10001968A EP2226453B1 EP 2226453 B1 EP2226453 B1 EP 2226453B1 EP 10001968 A EP10001968 A EP 10001968A EP 2226453 B1 EP2226453 B1 EP 2226453B1
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EP
European Patent Office
Prior art keywords
spindle
compression spring
helical compression
guide
coils
Prior art date
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Application number
EP10001968.6A
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German (de)
French (fr)
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EP2226453A3 (en
EP2226453A2 (en
Inventor
Matthias Johnen
Jörg DÖRNEN
Gaetan Cordiér
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Brose Schliesssysteme GmbH and Co KG
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Brose Schliesssysteme GmbH and Co KG
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Classifications

    • 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
    • E05F1/00—Closers or openers for wings, not otherwise provided for in this subclass
    • E05F1/08—Closers or openers for wings, not otherwise provided for in this subclass spring-actuated, e.g. for horizontally sliding wings
    • E05F1/10—Closers or openers for wings, not otherwise provided for in this subclass spring-actuated, e.g. for horizontally sliding wings for swinging wings, e.g. counterbalance
    • E05F1/1041—Closers or openers for wings, not otherwise provided for in this subclass spring-actuated, e.g. for horizontally sliding wings for swinging wings, e.g. counterbalance with a coil spring perpendicular to the pivot axis
    • E05F1/105—Closers or openers for wings, not otherwise provided for in this subclass spring-actuated, e.g. for horizontally sliding wings for swinging wings, e.g. counterbalance with a coil spring perpendicular to the pivot axis with a compression spring
    • E05F1/1058—Closers or openers for wings, not otherwise provided for in this subclass spring-actuated, e.g. for horizontally sliding wings for swinging wings, e.g. counterbalance with a coil spring perpendicular to the pivot axis with a compression spring for counterbalancing
    • 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
    • E05F15/622—Power-operated mechanisms for wings using electrical actuators using rotary electromotors for swinging wings operated by push-pull mechanisms using screw-and-nut mechanisms
    • 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
    • E05Y2201/40—Motors; Magnets; Springs; Weights; Accessories therefor
    • E05Y2201/47—Springs
    • E05Y2201/474—Compression springs
    • 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
    • E05Y2201/696—Screw mechanisms
    • E05Y2201/702—Spindles; Worms
    • 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
    • E05Y2800/00—Details, accessories and auxiliary operations not otherwise provided for
    • E05Y2800/40—Physical or chemical protection
    • E05Y2800/422—Physical or chemical protection against vibration or noise
    • 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
    • E05Y2900/546—Tailboards, tailgates or sideboards opening upwards

Definitions

  • the present invention relates to a spindle drive for an adjusting element of a motor vehicle according to the preamble of claim 1.
  • the spindle drive in question can be used for all possible adjustment elements of a motor vehicle.
  • a flap in particular a tailgate, a trunk lid, an engine hood, a side door, a loading space flap, a lifting roof or the like of a motor vehicle.
  • a well-known spindle drive ( DE 20 2005 003 466 U1 ), from which the invention is based, is used to adjust a tailgate of a motor vehicle.
  • the spindle drive is equipped with a drive motor and a spindle-spindle nut gear connected downstream of the drive motor for generating drive movements.
  • two connections are provided which are biased against one another by means of a plurality of one-piece helical compression springs.
  • the spindle nut is connected to a guide tube which, on the one hand, serves to guide the spindle projecting through the spindle nut and, on the other hand, serves to guide one of the helical compression springs via a guide sleeve.
  • the DE 10 2004 040 170 A1 also shows a spindle drive for adjusting a tailgate of a motor vehicle, this spindle drive also having a drive motor and a spindle-spindle gear mechanism connected downstream of the drive motor for generating drive movements.
  • a helical compression spring for preloading the spindle drive has a constant diameter.
  • the American patent US 4,318,535 shows a rear wheel suspension for a motorcycle with a hydraulic shock absorber in telescopic design.
  • the internal structure of the shock absorber should be suitable to disturb the flow of the oil in the cylinder of the shock absorber as little as possible.
  • a flap actuator with a hydraulic cylinder and a spring with decreasing winding diameter. Furthermore, in the DE 20 2006 015 153 U1 a flap drive with a spindle-spindle nut gear and with a spring with a constant winding diameter is shown.
  • the invention is based on the problem of designing and developing the known spindle drive in such a way that the interaction between the helical compression spring and the spindle drive is also optimized.
  • the helical compression spring can be easily adapted to the geometric conditions prevailing in the spindle drive.
  • a complex adaptation of these geometrical conditions, for example through the use of additional guide sleeves or the like, can be eliminated with the proposed solution.
  • the above adjustment of the helical compression spring is based on the fact that the helical compression spring has longitudinal sections which at least partially have different mean diameters. This allows the helical compression spring to be designed specifically for the available space.
  • the helical compression spring is equipped with guide windings which are in engagement with a guide surface for guiding the helical compression spring or can be brought in, and that the other spring windings are turns which are free from the guide surface.
  • guide windings replace guide sleeves in a cost-effective manner, which previously served to adapt the geometrical conditions prevailing in the spindle drive to the coil spring.
  • the spindle drive shown in the drawing is used for motorized adjustment of an adjusting element 1 designed as a tailgate. This is advantageous, but should not be understood as limiting. Rather, the proposed spindle drive can be used for all possible adjustment elements of a motor vehicle, as will be explained further below.
  • the spindle drive is equipped with a drive motor 2, a spindle-spindle gear 3 connected downstream of the drive motor 2 for generating linear drive movements and with two connections 4, 5 for leading out the drive movements.
  • a drive motor 2 a spindle-spindle gear 3 connected downstream of the drive motor 2 for generating linear drive movements and with two connections 4, 5 for leading out the drive movements.
  • Between the drive motor 2 and the spindle-spindle nut gear 3 is here and preferably one in particular as a planetary gear configured intermediate gear 6, which plays no role in the proposed solution.
  • the spindle drive has a one-piece helical compression spring 8 which is aligned with the longitudinal axis 7 of the spindle and serves to bias the spindle drive here and preferably into the extended position.
  • a helical compression spring 8 which is aligned with the longitudinal axis 7 of the spindle and serves to bias the spindle drive here and preferably into the extended position.
  • several helical compression springs can also be used here.
  • the helical compression spring 8 of the proposed spindle drive is particularly important in the field of motorized tail flap application. It counteracts the weight of the tailgate 1.
  • the helical compression spring 8 is preferably designed such that the resulting state comes as close as possible to a state of equilibrium. In the sense of an optimal approximation, as mentioned above, several, in particular different, helical compression springs 8 can be provided. In the following, only a single helical compression spring 8 is used as a representative of possibly several helical compression springs 8.
  • the proposed helical compression spring 8 deviates from the usual design insofar as it has spring coils 9 of different diameters. On the one hand, this allows length sections of different diameters to be realized, by means of which the helical compression spring 8 can be adapted to the available installation space. It is also conceivable that the helical compression spring 8 itself can be equipped with geometries for its own guidance. In all cases, it is the case that the helical compression spring 8 is equipped with spring coils 9 of different diameters in order to optimally adapt the helical compression spring 8 to the geometric conditions prevailing in the spindle drive.
  • the Fig. 2 and 3rd show that the proposed spindle drive has a housing 10 in which the spindle-spindle nut gear 3, the helical compression spring 8 and the drive motor 2 are arranged.
  • the above-mentioned intermediate gear 6 can also be found in the housing 10.
  • the drive motor 2 and / or the intermediate gear 6 as well as further drive components and couplings or the like can be arranged outside the housing 10. Possibly. a further housing is then provided for these drive components.
  • FIG. 2 shows that the housing 10 has an inner tube 10a connected to one of the two connections 4 and an outer tube 10b connected to the other connection 5 and telescopically displaceable relative to the inner tube 10a.
  • the spindle 11 of the spindle-spindle nut transmission 3 is axially fixed and rotatable relative to one of the two connections 4, 5, here and preferably the connection 4 connected to the inner tube 10a.
  • the spindle nut 12 of the spindle-spindle nut transmission 3, on the other hand, is connected to the respective other connection 5, here and preferably to the connection 5 connected to the outer tube 10b, via a guide tube 13, with a spindle section outside the guide tube 13 and a depending on the position of the spindle drive Spindle section is located within the guide tube 13.
  • the helical compression spring 8 surrounds the spindle 11 and extends essentially over the entire length of the spindle 11. It is conceivable that the helical compression spring 8 also extends only over a longitudinal section of the spindle 11. In the exemplary embodiment shown, this is accompanied by the fact that the helical compression spring 8 also surrounds the guide tube 13 and that the helical compression spring 8 extends over the entire length of the guide tube 13. Here too, it can be provided that the helical compression spring 8 extends only over a longitudinal section of the guide tube 13.
  • the guide tube 13 forms an additional guide for the spindle 11 of the spindle-spindle nut transmission 3.
  • the spindle 11 is equipped at the end with a sliding element 1 la.
  • the outside of the guide tube 13 also serves to guide the helical compression spring 8.
  • One can be Synopsis of Fig. 2 and 3rd remove that the guide tube 13 counteracts a buckling of the helical compression spring 8.
  • the guide tube 13, as is basically known from the prior art can be surrounded by a guide sleeve, not shown.
  • Fig. 2 derive that the spindle nut 12 together with the guide tube 13 forms a radial shoulder 14 directed towards the spindle 11 at the end, which is referred to below as the "spindle nut shoulder". It can also be seen from this illustration that the spindle nut shoulder 14 is exposed to the helical compression spring 8 and that the adjustment of the spindle drive is accompanied by an axial displacement of the spindle nut shoulder 14 relative to the spring turns 9 of the helical compression spring 8.
  • the inner tube 10a forms at the end a radial shoulder 15 directed towards the outer tube 10b, which is referred to below as the “housing shoulder”. It is also the case here that the adjustment of the spindle drive is accompanied by an axial displacement of the housing shoulder J.5 relative to the spring windings 9 of the helical pressure spring 8.
  • FIG. 2 shows that the inner tube 10a is positively engaged at the end with the outer tube 10b in the sense of an anti-rotation device. This is only addressed here in the sense of a complete presentation and is of no further importance for the proposed teaching.
  • the helical compression spring 8 has longitudinal sections 16, 17, 18, which here and preferably all have different average diameters, in such a way that the helical compression spring 8 is free of predetermined parts of the spindle drive, here and preferably of the spindle nut shoulder 14 and the Housing paragraph 15 remains. This will now be explained in detail.
  • the screw compression spring 8 has a length section 16 of smaller average diameter, which is referred to below as the "inner section”.
  • a length section adjoins the inner section 16 via a transition section 17 18 larger average diameter, which is referred to below as the "outer section”.
  • the transition section 17 can also be omitted, so that the transition between the inner section 16 and the outer section 18 then only takes place at a transition point.
  • the average diameter of the transition section 17 lies between the average diameter of the inner section 16 and the average diameter of the outer section 18.
  • the spindle nut shoulder 14 is located in the transition section 17.
  • the spindle nut shoulder 14 is thus already in a longitudinal section of the helical compression spring 8 that is widened with respect to the inner section 16, so that the radial distance between the spindle nut shoulder 14 and the spring windings 9 is correspondingly increased.
  • the spindle nut shoulder 14 is even located in the additionally widened outer section 18. This reduces the risk of snagging between the spindle nut shoulder 14 and the spring coils 9.
  • the spindle nut shoulder 14 remains free of the helical compression spring 8 even if the helical compression spring 8 bulges out laterally due to the tensioning of the helical compression spring 8.
  • the housing shoulder 15 thus remains free of the helical compression spring 8 even if the helical compression spring 8 bulges out laterally due to the tensioning of the helical compression spring 8.
  • the different diameters of the spring coils 9 of the helical compression spring 8 can also play an important role in the course of the guidance of the helical compression spring 8, in particular to prevent them from buckling.
  • the guide tube 13 then preferably forms a guide surface 19 for the inner section 16 of the helical compression spring 8 and the housing inner wall, here and preferably the inner surface of the inner tube 10a, a guide surface 20 for the outer section (18) of the helical compression spring (8).
  • the guidance of the helical compression spring 8 can be influenced in particular by the winding pattern that is implemented in each case.
  • Each length section 16, 17, 18 is fundamentally equipped with such a winding pattern. This also applies in the event that the helical compression spring 8 only consists of a single length section.
  • the winding pattern describes the course of the diameter of the spring windings 9 over the length of the respective length section 16, 17, 18 or over the length of the helical compression spring 8.
  • the transition section 17, for example, has a winding pattern with windings of constant diameter.
  • the inner section 16 and the outer section 18 of the helical compression spring 8 have guide windings 9b, 9c, which are or can be brought into engagement with a guide surface 19, 20 for guiding the helical compression spring 8.
  • the remaining spring windings 9a of the two sections 16, 18 are designed as free spring windings which are set back radially with respect to the respective guide surface 19, 20 and are therefore disengaged from the respective guide surface 19, 20.
  • the free spring turns 9a of the inner section 16 are radially outwards
  • the free spring windings 9a of the outer section 18 are set back radially inwards.
  • the diameters of the free spring windings 9a of the inner section 16 and the outer section 18 are essentially identical in absolute terms.
  • the guide surfaces 19, 20 are here and preferably formed by a housing inner wall, in particular by the inner surface of the inner tube 10a and, alternatively or additionally, by the outer surface of the guide tube 13.
  • Other guide surfaces 19, 20 are conceivable depending on the design of the spindle drive.
  • the outer section 18 of the helical compression spring 8 now has guide windings 9c and free windings 9a, here and preferably the inner surface of the inner tube 10a providing the guide surface 20 assigned to these guide windings 9c.
  • the inner section 16 of the helical compression spring 8 has guide windings 9b and free spring windings 9a, the outer surface of the guide tube 13 providing the guide surface 19 assigned to these guide windings 9b.
  • Fig. 5 The guide surfaces 19, 20 provided by the guide tube 13 on the one hand and the inner tube 10a on the other hand are shown schematically. It can be seen from this illustration that the guide windings 9b of the inner section 16 are or can be brought into engagement with the guide surface 19 provided by the guide tube 13 and that the guide windings 9c of the outer section 18 are or can be brought into engagement with the guide surface 20 provided by the inner tube 10a.
  • the number of free turns 9a is far greater than the number of guide turns 9b, 9c.
  • the ratio of the number of free turns 9a to the number of guide turns 9b, 9c lies in a range between 3: 1 and 5: 4, in particular in a range between 2: 1 and 3: 2. This ensures that a large part of the spring windings 9 does not come into engagement with the guide surfaces 19, 20 at all, which has advantageous effects on the noise development.
  • helical compression spring 8 can be adapted to almost any geometries of external guide surfaces 19 and internal guide surfaces 20 by a suitable design of the guide windings 9b, 9c.
  • a look at the representation in Fig. 5 also shows that the transition section 17 has not been equipped with guide turns and free turns in the above sense.
  • the reason for this is that the potential guide surfaces attributable to the transition section 17 have the spindle nut shoulder 14 in the region of the guide tube 13 and the housing shoulder 15 in the region of the inner wall of the housing in any case when the spindle drive is extended. It was explained further above that engagement of the helical compression spring 8 with these shoulders 14, 15 is to be avoided, so that the transition section 17 preferably has a winding pattern with a constant diameter for all windings.
  • the diameter of the spring turns 9a of the transition section 17 preferably corresponds to the diameter of the free turns 9a of the outer section 18 and the inner section 16.
  • the proposed spindle drive can be used in all possible adjustment elements 1 of a motor vehicle can.
  • the adjusting element 1 is a flap, in particular a tailgate, a boot lid, a door, in particular a side door, a bonnet or the like of a motor vehicle.

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Description

Die vorliegende Erfindung betrifft einen Spindelantrieb für ein Verstellelement eines Kraftfahrzeugs gemäß dem Oberbegriff von Anspruch 1.The present invention relates to a spindle drive for an adjusting element of a motor vehicle according to the preamble of claim 1.

Der in Rede stehende Spindelantrieb kann für alle möglichen Verstellelemente eines Kraftfahrzeugs Anwendung finden. Beispiele hierfür sind eine Klappe, insbesondere eine Heckklappe, ein Heckdeckel, eine Motorhaube, eine Seitentür, eine Laderaumklappe, ein Hubdach o. dgl. eines Kraftfahrzeugs.The spindle drive in question can be used for all possible adjustment elements of a motor vehicle. Examples of this are a flap, in particular a tailgate, a trunk lid, an engine hood, a side door, a loading space flap, a lifting roof or the like of a motor vehicle.

Ein bekannter Spindelantrieb ( DE 20 2005 003 466 U1 ), von dem die Erfindung ausgeht, dient der Verstellung einer Heckklappe eines Kraftfahrzeugs. Der Spindelantrieb ist mit einem Antriebsmotor und einem dem Antriebsmotor nachgeschalteten Spindel-Spindelmuttergetriebe zur Erzeugung von Antriebsbewegungen ausgestattet. Zum Ausleiten der Antriebsbewegungen sind zwei Anschlüsse vorgesehen, die mittels mehrerer einstückiger Schraubendruckfedern gegeneinander vorgespannt sind.A well-known spindle drive ( DE 20 2005 003 466 U1 ), from which the invention is based, is used to adjust a tailgate of a motor vehicle. The spindle drive is equipped with a drive motor and a spindle-spindle nut gear connected downstream of the drive motor for generating drive movements. To lead off the drive movements, two connections are provided which are biased against one another by means of a plurality of one-piece helical compression springs.

Bei dem bekannten Spindelantrieb ist die Spindelmutter mit einem Führungsrohr verbunden, das einerseits der Führung der durch die Spindelmutter hindurch ragenden Spindel dient und das andererseits über eine Führungshülse der Führung einer der Schraubendruckfedern dient.In the known spindle drive, the spindle nut is connected to a guide tube which, on the one hand, serves to guide the spindle projecting through the spindle nut and, on the other hand, serves to guide one of the helical compression springs via a guide sleeve.

Bei der Verstellung des bekannten Spindelantriebs in die eingefahrene Stellung ist stets ein jedenfalls geringfügiges seitliches Ausbeulen der Schraubendruckfedem zu beobachten, das bei der obigen Schraubendruckfeder über die Führungshülse abgefangen wird. Das Ausbeulen kann grundsätzlich zu Problemen im endseitigen Bereich der Führungshülse fuhren, in dem die Führungshülse zusammen mit dem Führungsrohr und der Spindelmutter einen zu der Spindel hin gerichteten Absatz bildet. Sofern die Schraubendruckfeder durch deren obiges Ausbeulen in Eingriff mit diesem Absatz kommt, kann es zu einem Verhaken und bei der weiteren Verstellung des Spindelantriebs zu knackenden Geräuschen kommen. Diese Geräuschentwicklung wird vom Benutzer als Komforteinbuße gesehen.When the known spindle drive is moved into the retracted position, a slight lateral bulging of the helical compression spring can always be observed, which is intercepted by the guide sleeve in the above helical compression spring. The bulging can in principle lead to problems in the end area of the guide sleeve, in which the guide sleeve forms a shoulder facing the spindle together with the guide tube and the spindle nut. If the helical compression spring comes into engagement with this shoulder due to its bulging above, this can result in jamming and cracking noises when the spindle drive is adjusted further. This noise development is seen by the user as a loss of comfort.

Die DE 10 2004 040 170 A1 zeigt ebenfalls einen Spindelantrieb zur Verstellung einer Heckklappe eines Kraftfahrzeugs, wobei auch dieser Spindelantrieb einen Antriebsmotor und einen dem Antriebsmotor nachgeschalteten Spindel-Spindelmuttergetriebe zur Erzeugung von Antriebsbewegungen aufweist. Eine Schraubendruckfeder zur Vorspannung des Spindelantriebs weist einen konstanten Durchmesser auf.The DE 10 2004 040 170 A1 also shows a spindle drive for adjusting a tailgate of a motor vehicle, this spindle drive also having a drive motor and a spindle-spindle gear mechanism connected downstream of the drive motor for generating drive movements. A helical compression spring for preloading the spindle drive has a constant diameter.

Das amerikanische Patent US 4,318,535 zeigt eine Hinterradaufhängung für ein Kraftrad mit einem hydraulischen Stoßdämpfer in Teleskopbauweise. Dabei soll der innere Aufbau des Stoßdämpfers dazu geeignet sein, ein Fließen des Öls im Zylinders des Stoßdämpfers möglichst wenig zu stören.The American patent US 4,318,535 shows a rear wheel suspension for a motorcycle with a hydraulic shock absorber in telescopic design. The internal structure of the shock absorber should be suitable to disturb the flow of the oil in the cylinder of the shock absorber as little as possible.

In der DE 20 2006 015 153 U1 ist ein Klappenantrieb mit einem Hydraulikzylinder und mit einer Feder mit abnehmenden Windungsdurchmesser gezeigt. Ferner ist in der DE 20 2006 015 153 U1 ein Klappenantrieb mit einem Spindel-Spindelmuttergetriebe und mit einer Feder mit konstantem Windungsdurchmesser gezeigt.In the DE 20 2006 015 153 U1 is shown a flap actuator with a hydraulic cylinder and a spring with decreasing winding diameter. Furthermore, in the DE 20 2006 015 153 U1 a flap drive with a spindle-spindle nut gear and with a spring with a constant winding diameter is shown.

Der Erfindung liegt das Problem zu Grunde, den bekannten Spindelantrieb derart auszugestalten und weiterzubilden, dass das Zusammenspiel zwischen der Schraubendruckfeder und dem Spindelantrieb im Übrigen optimiert wird.The invention is based on the problem of designing and developing the known spindle drive in such a way that the interaction between the helical compression spring and the spindle drive is also optimized.

Das obige Problem wird bei einem Spindelantrieb gemäß dem Oberbegriff von Anspruch 1 durch die Merkmale des kennzeichnenden Teils von Anspruch 1 gelöst.The above problem is solved in a spindle drive according to the preamble of claim 1 by the features of the characterizing part of claim 1.

Wesentlich ist die Erkenntnis, dass durch die Ausstattung der Schraubendruckfeder mit Federwindungen unterschiedlichen Durchmessers auf einfache Weise eine Anpassung der Schraubendruckfeder an die im Spindelantrieb herrschenden geometrischen Gegebenheiten möglich ist. Eine aufwendige Anpassung dieser geometrischen Gegebenheiten, beispielsweise durch die Verwendung zusätzlicher Führungshülsen o. dgl., kann mit der vorschlagsgemäßen Lösung entfallen.It is essential to recognize that by equipping the helical compression spring with spring windings of different diameters, the helical compression spring can be easily adapted to the geometric conditions prevailing in the spindle drive. A complex adaptation of these geometrical conditions, for example through the use of additional guide sleeves or the like, can be eliminated with the proposed solution.

In besonders bevorzugter Ausgestaltung gemäß Anspruch 7 geht die obige Anpassung der Schraubendruckfeder darauf zurück, dass die Schraubendruckfeder Längenabschnitte aufweist, die zumindest zum Teil unterschiedliche mittlere Durchmesser aufweisen. Damit kann die Schraubendruckfeder gezielt auf den jeweils freien Bauraum hin ausgelegt werden.In a particularly preferred embodiment according to claim 7, the above adjustment of the helical compression spring is based on the fact that the helical compression spring has longitudinal sections which at least partially have different mean diameters. This allows the helical compression spring to be designed specifically for the available space.

Bei einer anderen bevorzugten Variante gemäß Anspruch 12 ist es so, dass die Schraubendruckfeder mit Führungswindungen ausgestattet ist, die zur Führung der Schraubendruckfeder in Eingriff mit einer Führungsfläche stehen oder bringbar sind und dass die übrigen Federwindungen von der Führungsfläche freie Windungen sind. Solche Führungswindungen ersetzen auf kostengünstige Weise Führungshülsen, die bislang der Anpassung der im Spindelantrieb herrschenden geometrischen Gegebenheiten an die Schraubenfeder dienten.In another preferred variant according to claim 12 it is the case that the helical compression spring is equipped with guide windings which are in engagement with a guide surface for guiding the helical compression spring or can be brought in, and that the other spring windings are turns which are free from the guide surface. Such guide windings replace guide sleeves in a cost-effective manner, which previously served to adapt the geometrical conditions prevailing in the spindle drive to the coil spring.

Im Folgenden wird die Erfindung anhand einer lediglich ein Ausführungsbeispiel darstellenden Zeichnung näher erläutert. In der Zeichnung zeigt

Fig. 1
in einer ganz schematischen Darstellung den Heckbereich eines Kraftfahrzeugs mit einer Heckklappe, die mit einem vorschlagsgemäßen Spindelantrieb ausgestattet ist,
Fig. 2
den Spindelantrieb gemäß Fig. 1 in der ausgefahrenen Stellung in einer geschnittenen Seitenansicht,
Fig. 3
den Spindelantrieb gemäß Fig. 1 in der eingefahrenen Stellung in einer geschnittenen Seitenansicht,
Fig. 4
die Schraubendruckfeder des Spindelantriebs gemäß Fig. 1 in einer Seitenansicht,
Fig. 5
die Schraubendruckfeder gemäß Fig. 4 in der ausschnittweisen Ansicht A und
Fig. 6
die Schraubendruckfeder gemäß Fig. 4 in einer perspektivischen Ansicht.
The invention is explained in more detail below on the basis of a drawing illustrating only one exemplary embodiment. In the drawing shows
Fig. 1
a very schematic representation of the rear area of a motor vehicle with a tailgate that is equipped with a proposed spindle drive,
Fig. 2
the spindle drive according to Fig. 1 in the extended position in a sectional side view,
Fig. 3
the spindle drive according to Fig. 1 in the retracted position in a sectional side view,
Fig. 4
the helical compression spring of the spindle drive according to Fig. 1 in a side view,
Fig. 5
the helical compression spring according to Fig. 4 in the sectional view A and
Fig. 6
the helical compression spring according to Fig. 4 in a perspective view.

Der in der Zeichnung dargestellte Spindelantrieb dient der motorischen Verstellung eines als Heckklappe ausgestalteten Verstellelements 1. Dies ist zwar vorteilhaft, aber nicht beschränkend zu verstehen. Vielmehr lässt sich der vorschlagsgemäße Spindelantrieb für alle möglichen Verstellelemente eines Kraftfahrzeugs einsetzen, wie weiter unten noch erläutert wird.The spindle drive shown in the drawing is used for motorized adjustment of an adjusting element 1 designed as a tailgate. This is advantageous, but should not be understood as limiting. Rather, the proposed spindle drive can be used for all possible adjustment elements of a motor vehicle, as will be explained further below.

Der Spindelantrieb ist mit einem Antriebsmotor 2, einem dem Antriebsmotor 2 nachgeschalteten Spindel-Spindelmuttergetriebe 3 zur Erzeugung linearer Antriebsbewegungen und mit zwei Anschlüssen 4, 5 zum Ausleiten der Antriebsbewegungen ausgestattet. Zwischen den Antriebsmotor 2 und das Spindel-Spindelmuttergetriebe 3 ist hier und vorzugsweise ein insbesondere als Planetenradgetriebe ausgestaltetes Zwischengetriebe 6 geschaltet, das für die vorschlagsgemäße Lösung keine Rolle spielt.The spindle drive is equipped with a drive motor 2, a spindle-spindle gear 3 connected downstream of the drive motor 2 for generating linear drive movements and with two connections 4, 5 for leading out the drive movements. Between the drive motor 2 and the spindle-spindle nut gear 3 is here and preferably one in particular as a planetary gear configured intermediate gear 6, which plays no role in the proposed solution.

Der Spindelantrieb weist eine auf die Spindellängsachse 7 ausgerichtete, einstückige Schraubendruckfeder 8 auf, die der Vorspannung des Spindelantriebs hier und vorzugsweise in die ausgefahrene Stellung dient. Grundsätzlich können hier auch mehrere Schraubendruckfedem Anwendung finden.The spindle drive has a one-piece helical compression spring 8 which is aligned with the longitudinal axis 7 of the spindle and serves to bias the spindle drive here and preferably into the extended position. In principle, several helical compression springs can also be used here.

Der Schraubendruckfeder 8 des vorschlagsgemäßen Spindelantriebs kommt insbesondere im Anwendungsbereich der motorischen Verstellung von Heccklappen besondere Bedeutung zu. Sie wirkt der Gewichtskraft der Heckklappe 1 entgegen. Vorzugsweise ist die Schraubendruckfeder 8 im Hinblick auf die Gewichtskraft der Heckklappe 1 so ausgelegt, dass der resultierende Zustand einem Gleichgewichtszustand so nahe wie möglich kommt. Im Sinne einer optimalen Annäherung können wie oben angesprochen mehrere, insbesondere unterschiedliche Schraubendruckfedem 8 vorgesehen sein. Im Folgenden ist stellvertretend für ggf. mehrere Schraubendruckfedern 8 nur von einer einzigen Schraubendruckfeder 8 die Rede.The helical compression spring 8 of the proposed spindle drive is particularly important in the field of motorized tail flap application. It counteracts the weight of the tailgate 1. With regard to the weight of the tailgate 1, the helical compression spring 8 is preferably designed such that the resulting state comes as close as possible to a state of equilibrium. In the sense of an optimal approximation, as mentioned above, several, in particular different, helical compression springs 8 can be provided. In the following, only a single helical compression spring 8 is used as a representative of possibly several helical compression springs 8.

Es lässt sich den Darstellungen in den Fig. 4 bis 6 entnehmen, dass die vorschlagsgemäße Schraubendruckfeder 8 von der üblichen Ausgestaltung insoweit abweicht, als sie Federwindungen 9 unterschiedlichen Durchmessers aufweist. Damit lassen sich einerseits Längenabschnitte unterschiedlicher Durchmesser realisieren, über die die Schraubendruckfeder 8 an den jeweils verfügbaren Bauraum abgepasst werden kann. Denkbar ist aber auch, dass die Schraubendruckfeder 8 selbst mit Geometrien zu ihrer eigenen Führung ausgestattet werden kann. In allen Fällen ist es so, dass die Ausstattung der Schraubendruckfeder 8 mit Federwindungen 9 unterschiedlichen Durchmessers dazu dient, die Schraubendruckfeder 8 optimal auf die im Spindelantrieb herrschenden geometrischen Gegebenheiten anzupassen.It can be shown in the 4 to 6 It can be seen that the proposed helical compression spring 8 deviates from the usual design insofar as it has spring coils 9 of different diameters. On the one hand, this allows length sections of different diameters to be realized, by means of which the helical compression spring 8 can be adapted to the available installation space. It is also conceivable that the helical compression spring 8 itself can be equipped with geometries for its own guidance. In all cases, it is the case that the helical compression spring 8 is equipped with spring coils 9 of different diameters in order to optimally adapt the helical compression spring 8 to the geometric conditions prevailing in the spindle drive.

Um die vorschlagsgemäße Lehre besser darstellen zu können, werden zunächst die oben angesprochenen, im Spindelantrieb herrschenden geometrischen Gegebenheiten erläutert.In order to be able to better represent the teaching according to the proposal, the above-mentioned geometric conditions prevailing in the spindle drive are first explained.

Die Fig. 2 und 3 zeigen, dass der vorschlagsgemäße Spindelantrieb ein Gehäuse 10 aufweist, in dem das Spindel-Spindelmuttergetriebe 3, die Schraubendruckfeder 8 und der Antriebsmotor 2 angeordnet sind. Entsprechend findet sich auch das oben angesprochene Zwischengetriebe 6 im Gehäuse 10. Grundsätzlich können der Antriebsmotor 2 und/oder das Zwischengetriebe 6 sowie weitere Antriebskomponenten sowie Kupplungen o. dgl. außerhalb des Gehäuses 10 angeordnet sein. Ggf. ist dann ein weiteres Gehäuse für diese Antriebskomponenten vorgesehen.The Fig. 2 and 3rd show that the proposed spindle drive has a housing 10 in which the spindle-spindle nut gear 3, the helical compression spring 8 and the drive motor 2 are arranged. Correspondingly, the above-mentioned intermediate gear 6 can also be found in the housing 10. In principle, the drive motor 2 and / or the intermediate gear 6 as well as further drive components and couplings or the like can be arranged outside the housing 10. Possibly. a further housing is then provided for these drive components.

Die Detaildarstellung in Fig. 2 zeigt, dass das Gehäuse 10 ein mit einem der beiden Anschlüsse 4 verbundenes Innenrohr 10a und ein mit dem jeweils anderen Anschluss 5 verbundenes, teleskopartig gegenüber dem Innenrohr 10a verschiebbares Außenrohr 10b aufweist.The detailed representation in Fig. 2 shows that the housing 10 has an inner tube 10a connected to one of the two connections 4 and an outer tube 10b connected to the other connection 5 and telescopically displaceable relative to the inner tube 10a.

Die Spindel 11 des Spindel-Spindelmuttergetriebes 3 ist gegenüber einem der beiden Anschlüsse 4, 5, hier und vorzugsweise dem mit dem Innenrohr 10a verbundenen Anschluss 4, axialfest und drehbar gelagert. Die Spindelmutter 12 des Spindel-Spindelmuttergetriebes 3 dagegen ist mit dem jeweils anderen Anschluss 5, hier und vorzugsweise dem mit dem Außenrohr 10b verbundenen Anschluss 5, über ein Führungsrohr 13 verbunden, wobei je nach Stellung des Spindelantriebs ein Spindel abschnitt außerhalb des Führungsrohrs 13 und ein Spindelabschnitt innerhalb des Führungsrohrs 13 gelegen ist.The spindle 11 of the spindle-spindle nut transmission 3 is axially fixed and rotatable relative to one of the two connections 4, 5, here and preferably the connection 4 connected to the inner tube 10a. The spindle nut 12 of the spindle-spindle nut transmission 3, on the other hand, is connected to the respective other connection 5, here and preferably to the connection 5 connected to the outer tube 10b, via a guide tube 13, with a spindle section outside the guide tube 13 and a depending on the position of the spindle drive Spindle section is located within the guide tube 13.

Die Schraubendruckfeder 8 umschließt die Spindel 11 und erstreckt sich im Wesentlichen über die gesamte Länge der Spindel 11. Denkbar ist, dass sich die Schraubendruckfeder 8 auch nur über einen Längenabschnitt der Spindel 11 erstreckt. Bei dem im dargestellten Ausfuhrungsbeispiel geht damit einher, dass die Schraubendruckfeder 8 auch das Führungsrohr 13 umschließt und dass sich die Schraubendruckfeder 8 über die gesamte Länge des Führungsrohrs 13 erstreckt. Auch hier kann es vorgesehen sein, dass sich die Schraubendruckfeder 8 nur über einen Längenabschnitt des Führungsrohrs 13 erstreckt.The helical compression spring 8 surrounds the spindle 11 and extends essentially over the entire length of the spindle 11. It is conceivable that the helical compression spring 8 also extends only over a longitudinal section of the spindle 11. In the exemplary embodiment shown, this is accompanied by the fact that the helical compression spring 8 also surrounds the guide tube 13 and that the helical compression spring 8 extends over the entire length of the guide tube 13. Here too, it can be provided that the helical compression spring 8 extends only over a longitudinal section of the guide tube 13.

Das Führungsrohr 13 bildet innenseitig eine zusätzliche Führung für die Spindel 11 des Spindel-Spindelmuttergetriebes 3. Hierfür ist die Spindel 11 endseitig mit einem Gleitelement 1 la ausgestattet. Das Führungsrohr 13 dient darüber hinaus mit seiner Außenseite der Führung der Schraubendruckfeder 8. Es lässt sich einer Zusammenschau der Fig. 2 und 3 entnehmen, dass das Führungsrohr 13 einem Ausknicken der Schraubendruckfeder 8 entgegenwirkt. Hierfür kann das Führungsrohr 13, wie grundsätzlich aus dem Stand der Technik bekannt, von einer nicht dargestellten Führungshülse umgeben sein.On the inside, the guide tube 13 forms an additional guide for the spindle 11 of the spindle-spindle nut transmission 3. For this purpose, the spindle 11 is equipped at the end with a sliding element 1 la. The outside of the guide tube 13 also serves to guide the helical compression spring 8. One can be Synopsis of Fig. 2 and 3rd remove that the guide tube 13 counteracts a buckling of the helical compression spring 8. For this purpose, the guide tube 13, as is basically known from the prior art, can be surrounded by a guide sleeve, not shown.

Es lässt sich der Detailansicht in Fig. 2 entnehmen, dass die Spindelmutter 12 zusammen mit dem Führungsrohr 13 endseitig einen radialen, zu der Spindel 11 hin gerichteten Absatz 14 bildet, der im Folgenden als "Spindelmutterabsatz" bezeichnet wird. Es lässt sich dieser Darstellung auch entnehmen, dass der Spindelmutterabsatz 14 zu der Schraubendruckfeder 8 hin exponiert ist und dass mit der Verstellung des Spindelantriebs eine axiale Verlagerung des Spindelmutterabsatzes 14 relativ zu den Federwindungen 9 der Schraubendruckfeder 8 einhergeht.It can be viewed in detail Fig. 2 derive that the spindle nut 12 together with the guide tube 13 forms a radial shoulder 14 directed towards the spindle 11 at the end, which is referred to below as the "spindle nut shoulder". It can also be seen from this illustration that the spindle nut shoulder 14 is exposed to the helical compression spring 8 and that the adjustment of the spindle drive is accompanied by an axial displacement of the spindle nut shoulder 14 relative to the spring turns 9 of the helical compression spring 8.

Zusätzlich zu dem Spindelmutterabsatz 14 bildet das Innenrohr 10a endseitig einen radialen, zum Außenrohr 10b hin gerichteten Absatz 15, der im Folgenden als "Gehäuseabsatz" bezeichnet wird. Auch hier ist es so, dass mit der Verstellung des Spindelantriebs eine axiale Verlagerung des Gehäuseabsatzes J.5 relativ zu den Federwindungen 9 der Schraubendmckfeder 8 einhergeht.In addition to the spindle nut shoulder 14, the inner tube 10a forms at the end a radial shoulder 15 directed towards the outer tube 10b, which is referred to below as the “housing shoulder”. It is also the case here that the adjustment of the spindle drive is accompanied by an axial displacement of the housing shoulder J.5 relative to the spring windings 9 of the helical pressure spring 8.

Die Detailansicht in Fig. 2 zeigt, dass das Innenrohr 10a endseitig mit dem Au-ßenrohr 10b im Sinne einer Verdrehsicherung formschlüssig in Eingriff steht. Dies wird hier nur im Sinne einer vollständigen Darstellung angesprochen und ist für die vorschlagsgemäße Lehre nicht weiter von Bedeutung.The detailed view in Fig. 2 shows that the inner tube 10a is positively engaged at the end with the outer tube 10b in the sense of an anti-rotation device. This is only addressed here in the sense of a complete presentation and is of no further importance for the proposed teaching.

Wesentlich ist nun, dass die Schraubendruckfeder 8 Längenabschnitte 16, 17, 18 aufweist, die hier und vorzugsweise alle unterschiedliche mittlere Durchmesser aufweisen, und zwar derart, dass die Schraubendruckfeder 8 frei von vorbestimmten Teilen des Spindelantriebs, hier und vorzugsweise von dem Spindelmutterabsatz 14 und dem Gehäuseabsatz 15, bleibt. Dies wird nun im Detail erläutert.It is essential that the helical compression spring 8 has longitudinal sections 16, 17, 18, which here and preferably all have different average diameters, in such a way that the helical compression spring 8 is free of predetermined parts of the spindle drive, here and preferably of the spindle nut shoulder 14 and the Housing paragraph 15 remains. This will now be explained in detail.

Es lässt sich am besten den Darstellungen in Fig. 5 und 6 entnehmen, dass die Scbraubendruckfeder 8 einen Längenabschnitt 16 kleineren mittleren Durchmessers aufweist, der im Folgenden als "Innenabschnitt" bezeichnet wird. An den Innenabschnitt 16 schließt sich über einen Übergangsabschnitt 17 ein Längenabschnitt 18 größeren mittleren Durchmessers an, der im Folgenden als "Außenabschnitt" bezeichnet wird. Der Übergangsabschnitt 17 kann grundsätzlich auch entfallen, so dass der Übergang zwischen dem Innenabschnitt 16 und dem Außenabschnitt 18 dann lediglich an einer Übergangsstelle erfolgt.It can best be shown in Fig. 5 and 6 It can be seen that the screw compression spring 8 has a length section 16 of smaller average diameter, which is referred to below as the "inner section". A length section adjoins the inner section 16 via a transition section 17 18 larger average diameter, which is referred to below as the "outer section". In principle, the transition section 17 can also be omitted, so that the transition between the inner section 16 and the outer section 18 then only takes place at a transition point.

In besonders bevorzugter Ausgestaltung liegt der mittlere Durchmesser des Übergangsabschnitts 17 zwischen dem mittleren Durchmesser des Innenabschnitts 16 und dem mittleren Durchmesser des Außenabschnitts 18.In a particularly preferred embodiment, the average diameter of the transition section 17 lies between the average diameter of the inner section 16 and the average diameter of the outer section 18.

Befindet sich nun der Spindelantrieb in der ausgefahrenen Stellung, in der die Schraubendruckfeder 8 minimal oder gar nicht gespannt ist, so ist der Spindelmutterabsatz 14 im Übergangsabschnitt 17 gelegen. Damit befindet sich der Spindelmutterabsatz 14 bereits in einem gegenüber dem Innenabschnitt 16 aufgeweiteten Längenabschnitt der Schraubendruckfeder 8, so dass der radiale Abstand zwischen dem Spindelmutterabsatz 14 und den Federwindungen 9 entsprechend vergrößert ist. In der in Fig. 3 dargestellten, eingefahrenen Stellung des Spindelantriebs ist der Spindelmutterabsatz 14 sogar im zusätzlich aufgeweiteten Außenabschnitt 18 gelegen. Dies reduziert die Gefahr des Verhakens zwischen dem Spindelmutterabsatz 14 und den Federwindungen 9. Der Spindelmutterabsatz 14 bleibt auch bei einem auf das Spannen der Schraubendruckfeder 8 zurückgehenden seitlichen Ausbeulen der Schraubendruckfeder 8 frei von der Schraubendruckfeder 8.If the spindle drive is now in the extended position, in which the helical compression spring 8 is minimally or not at all tensioned, the spindle nut shoulder 14 is located in the transition section 17. The spindle nut shoulder 14 is thus already in a longitudinal section of the helical compression spring 8 that is widened with respect to the inner section 16, so that the radial distance between the spindle nut shoulder 14 and the spring windings 9 is correspondingly increased. In the in Fig. 3 shown, retracted position of the spindle drive, the spindle nut shoulder 14 is even located in the additionally widened outer section 18. This reduces the risk of snagging between the spindle nut shoulder 14 and the spring coils 9. The spindle nut shoulder 14 remains free of the helical compression spring 8 even if the helical compression spring 8 bulges out laterally due to the tensioning of the helical compression spring 8.

Ähnlich gute Ergebnisse lassen sich dadurch erzielen, dass der Spindelmutterabsatz 14 in der ausgefahren Stellung bereits im Außenabschnitt 18 oder, sofern ein Übergangsabschnitt 17 fehlt, im Bereich der entsprechenden Übergangsstelle gelegen ist.Similar good results can be achieved if the spindle nut shoulder 14 is already in the extended position in the outer section 18 or, if a transition section 17 is missing, in the area of the corresponding transition point.

Das obige Grundprinzip der Vermeidung des Eingriffs zwischen der Schraubendruckfeder 8 und einem Teil des Spindelantriebs lässt sich auch auf den Gehäuseabsatz 15 anwenden. Es lässt wieder der Detailansicht in Fig. 2 entnehmen, dass der Gehäuseabsatz 15 in der ausgefahrenen Stellung im Übergangsabschnitt 17 gelegen ist und dass der Gehäuseabsatz 15 in der eingefahrenen Stellung (Fig. 3) im Innenabschnitt 16 gelegen ist. Auch hiermit wird erreicht, dass der radiale Abstand zwischen dem Gehäuseabsatz 15 und den Federwindungen vergleichsweise groß ist.The above basic principle of avoiding the engagement between the helical compression spring 8 and a part of the spindle drive can also be applied to the housing shoulder 15. It leaves the detail view in again Fig. 2 that the housing shoulder 15 is located in the extended position in the transition section 17 and that the housing shoulder 15 is in the retracted position ( Fig. 3 ) is located in the inner section 16. This also ensures that the radial distance between the housing shoulder 15 and the spring windings is comparatively large.

Damit bleibt bei geeigneter Auslegung der Gehäuseabsatz 15 auch bei einem auf das Spannen der Schraubendruckfeder 8 zurückgehenden seitlichen Ausbeulen der Schraubendruckfeder 8 frei von der Schraubendruckfeder 8.With a suitable design, the housing shoulder 15 thus remains free of the helical compression spring 8 even if the helical compression spring 8 bulges out laterally due to the tensioning of the helical compression spring 8.

Die unterschiedlichen Durchmesser der Federwindungen 9 der Schraubendruckfeder 8 können auch im Rahmen der Führung der Schraubendruckfeder 8 insbesondere zur Vermeidung deren Ausknickens eine wichtige Rolle spielen. Vorzugsweise bildet das Führungsrohr 13 dann eine Führungsfläche 19 für den Innenabschnitt 16 der Schraubendruckfeder 8 und die Gehäuseinnenwand, hier und vorzugsweise die Innenfläche des Innenrohrs 10a, eine Führungsfläche 20 für den Außenabschnitt (18) der Schraubendruckfeder (8).The different diameters of the spring coils 9 of the helical compression spring 8 can also play an important role in the course of the guidance of the helical compression spring 8, in particular to prevent them from buckling. The guide tube 13 then preferably forms a guide surface 19 for the inner section 16 of the helical compression spring 8 and the housing inner wall, here and preferably the inner surface of the inner tube 10a, a guide surface 20 for the outer section (18) of the helical compression spring (8).

Die Führung der Schraubendruckfeder 8 lässt sich insbesondere durch das jeweils realisierte Windungsmuster beeinflussen. Jeder Längenabschnitt 16, 17, 18 ist grundsätzlich mit einem solchen Windungsmuster ausgestattet. Dies gilt auch für den Fall, dass die Schraubendruckfeder 8 überhaupt nur aus einem einzigen Längenabschnitt besteht.The guidance of the helical compression spring 8 can be influenced in particular by the winding pattern that is implemented in each case. Each length section 16, 17, 18 is fundamentally equipped with such a winding pattern. This also applies in the event that the helical compression spring 8 only consists of a single length section.

Das Windungsmuster beschreibt im vorliegenden Sinne den Verlauf des Durchmessers der Federwindungen 9 über die Länge des jeweiligen Längenabschnitts 16, 17, 18 bzw. über die Länge der Schraubendruckfeder 8.In the present sense, the winding pattern describes the course of the diameter of the spring windings 9 over the length of the respective length section 16, 17, 18 or over the length of the helical compression spring 8.

Der Übergangsabschnitt 17 beispielsweise weist ein Windungsmuster mit Windungen von konstantem Durchmesser auf. Der Außenabschnitt 18 und der Innenabschnitt 16 dagegen weisen Windungsmuster mit Windungen von periodisch sich abwechselnden unterschiedlichen Durchmessern auf. Der Grund hierfür wird aus den folgenden Erläuterungen deutlich.The transition section 17, for example, has a winding pattern with windings of constant diameter. The outer section 18 and the inner section 16, on the other hand, have winding patterns with turns of periodically alternating different diameters. The reason for this is clear from the following explanations.

Der Innenabschnitt 16 und der Außenabschnitt 18 der Schraubendruckfeder 8 weisen Führungswindungen 9b, 9c auf, die zur Führung der Schraubendruckfeder 8 in Eingriff mit jeweils einer Führungsfläche 19, 20 stehen oder bringbar sind. Die übrigen Federwindungen 9a der beiden Abschnitte 16, 18 sind als freie Federwindungen ausgestaltet, die im Hinblick auf die jeweilige Führungsfläche 19, 20 radial zurückversetzt sind und damit außer Eingriff von der jeweiligen Führungsfläche 19, 20 stehen. Die freien Federwindungen 9a des Innenabschnitts 16 sind radial nach Außen, die freien Federwindungen 9a des Außenabschnitts 18 sind radial nach Innen zurückversetzt. Dabei sind hier und vorzugsweise die Durchmesser der freien Federwindungen 9a des Innenabschnitts 16 und des Außenabschnitts 18 absolut gesehen im wesentlichen identisch.The inner section 16 and the outer section 18 of the helical compression spring 8 have guide windings 9b, 9c, which are or can be brought into engagement with a guide surface 19, 20 for guiding the helical compression spring 8. The remaining spring windings 9a of the two sections 16, 18 are designed as free spring windings which are set back radially with respect to the respective guide surface 19, 20 and are therefore disengaged from the respective guide surface 19, 20. The free spring turns 9a of the inner section 16 are radially outwards, the free spring windings 9a of the outer section 18 are set back radially inwards. Here and preferably the diameters of the free spring windings 9a of the inner section 16 and the outer section 18 are essentially identical in absolute terms.

Die Führungsflächen 19, 20 werden hier und vorzugsweise von einer Gehäuseinnenwand, insbesondere von der Innenfläche des Innenrohrs 10a und, alternativ oder zusätzlich, von der Außenfläche des Führungsrohrs 13 gebildet. Andere Führungsflächen 19,20 sind je nach Ausgestaltung des Spindelantriebs denkbar.The guide surfaces 19, 20 are here and preferably formed by a housing inner wall, in particular by the inner surface of the inner tube 10a and, alternatively or additionally, by the outer surface of the guide tube 13. Other guide surfaces 19, 20 are conceivable depending on the design of the spindle drive.

Im Einzelnen weist nun der Außenabschnitt 18 der Schraubendruckfeder 8 Führungswindungen 9c und freie Windungen 9a auf, wobei hier und vorzugsweise die Innenfläche des Innenrohrs 10a die diesen Führungswindungen 9c zugeordnete Führungsfläche 20 bereitstellt.In detail, the outer section 18 of the helical compression spring 8 now has guide windings 9c and free windings 9a, here and preferably the inner surface of the inner tube 10a providing the guide surface 20 assigned to these guide windings 9c.

Ferner ist es so, dass der Innenabschnitt 16 der Schraubendruckfeder 8 Führungswindungen 9b und freie Federwindungen 9a aufweist, wobei die Außenfläche des Führungsrohrs 13 die diesen Führungswindungen 9b zugeordnete Führungsfläche 19 bereitstellt.It is further the case that the inner section 16 of the helical compression spring 8 has guide windings 9b and free spring windings 9a, the outer surface of the guide tube 13 providing the guide surface 19 assigned to these guide windings 9b.

In Fig. 5 sind die durch das Führungsrohr 13 einerseits und das Innenrohr 10a andererseits bereitgestellten Führungsflächen 19,20 schematisch dargestellt. Aus dieser Darstellung geht hervor, dass die Führungswindungen 9b des Innenabschnitts 16 mit der vom Führungsrohr 13 bereitgestellten Führungsfläche 19 in Eingriff stehen oder bringbar sind und dass die Führungswindungen 9c des Außenabschnitts 18 mit der vom Innenrohr 10a bereitgestellten Führungsfläche 20 in Eingriff stehen oder bringbar sind.In Fig. 5 The guide surfaces 19, 20 provided by the guide tube 13 on the one hand and the inner tube 10a on the other hand are shown schematically. It can be seen from this illustration that the guide windings 9b of the inner section 16 are or can be brought into engagement with the guide surface 19 provided by the guide tube 13 and that the guide windings 9c of the outer section 18 are or can be brought into engagement with the guide surface 20 provided by the inner tube 10a.

Es fällt auf, dass in dem jeweiligen Längenabschnitt 16, 18 der Schraubendruckfeder 8 die Anzahl der freien Windungen 9a weitaus größer als die Anzahl der Führungswindungen 9b, 9c ist. Hier und vorzugsweise liegt das Verhältnis der Anzahl der freien Windungen 9a zu der Anzahl der Führungswindungen 9b, 9c in einem Bereich zwischen 3:1 und 5:4, insbesondere in einem Bereich zwischen 2:1 und 3:2. Damit wird erreicht, dass ein Großteil der Federwindungen 9 überhaupt nicht in Eingriff mit den Führungsflächen 19, 20 kommt, was vorteilhafte Auswirkungen auf die Geräuschentwicklung hat.It is striking that in the respective length section 16, 18 of the helical compression spring 8, the number of free turns 9a is far greater than the number of guide turns 9b, 9c. Here and preferably the ratio of the number of free turns 9a to the number of guide turns 9b, 9c lies in a range between 3: 1 and 5: 4, in particular in a range between 2: 1 and 3: 2. This ensures that a large part of the spring windings 9 does not come into engagement with the guide surfaces 19, 20 at all, which has advantageous effects on the noise development.

Ferner ist insbesondere im Hinblick auf die Führung der Schraubendruckfeder 8 im Außenabschnitt 18 vorteilhaft zu erwähnen, dass eine mit dem Spannen der Schraubendruckfeder 8 grundsätzlich verbundene Durchmesserzunahme kein Verklemmen gegenüber dem Gehäuse 10 verursacht, da mit der Durchmesserdifferenz zwischen den Führungswindungen 9c und den freien Windungen 9a stets eine hinreichende "Durchmesserreserve" vorhanden ist.Furthermore, in particular with regard to the guidance of the helical compression spring 8 in the outer section 18, it should advantageously be mentioned that an increase in diameter which is generally associated with the tensioning of the helical compression spring 8 does not cause jamming with respect to the housing 10, since with the difference in diameter between the guide windings 9c and the free windings 9a there is always a sufficient "diameter reserve".

Vor allem wird aus der Darstellung in Fig. 5 aber deutlich, dass die Schraubendruckfeder 8 durch eine geeignete Auslegung der Führungswindungen 9b, 9c auf nahezu beliebige Geometrien von außenliegenden Führungsflächen 19 und innenliegenden Führungsflächen 20 angepasst werden kann.Above all, the representation in Fig. 5 but it is clear that the helical compression spring 8 can be adapted to almost any geometries of external guide surfaces 19 and internal guide surfaces 20 by a suitable design of the guide windings 9b, 9c.

Ein Blick auf die Darstellung in Fig. 5 zeigt auch, dass der Übergangsabschnitt 17 mit Führungswindungen und freien Windungen im obigen Sinne nicht ausgestattet worden ist. Der Grund hierfür besteht darin, dass die potentiellen, dem Übergangsabschnitt 17 zurechenbaren Führungsflächen jedenfalls bei ausgefahrenem Spindelantrieb im Bereich des Führungsrohrs 13 den Spindelmutterabsatz 14 und im Bereich der Gehäuseinnenwand den Gehäuseabsatz 15 aufweisen. Es wurde weiter oben erläutert, dass ein Eingriff der Schraubendruckfeder 8 mit diesen Absätzen 14,15 zu vermeiden ist, so dass der Übergangsabschnitt 17 vorzugsweise ein Windungsmuster mit konstantem Durchmesser für alle Windungen aufweist. Dabei entspricht der Durchmesser der Federwindungen 9a des Übergangsabschnitts 17 vorzugsweise dem Durchmesser der freien Windungen 9a des Außenabschnitts 18 und des Innenabschnitts 16.A look at the representation in Fig. 5 also shows that the transition section 17 has not been equipped with guide turns and free turns in the above sense. The reason for this is that the potential guide surfaces attributable to the transition section 17 have the spindle nut shoulder 14 in the region of the guide tube 13 and the housing shoulder 15 in the region of the inner wall of the housing in any case when the spindle drive is extended. It was explained further above that engagement of the helical compression spring 8 with these shoulders 14, 15 is to be avoided, so that the transition section 17 preferably has a winding pattern with a constant diameter for all windings. The diameter of the spring turns 9a of the transition section 17 preferably corresponds to the diameter of the free turns 9a of the outer section 18 and the inner section 16.

Im Hinblick auf die Darstellung gemäß Fig. 5 darf darauf hingewiesen werden, dass zum leichteren Verständnis die freien Federwindungen des Außenabschnitts 18 und des Innenabschnitts 16 mit dem Symbol "0" versehen sind, dass die Führungswindungen 9b des Innenabschnitts 16 mit dem Symbol "-" versehen sind und dass die Führungswindungen 9c des Außenabschnitts 18 mit dem Symbol "+" versehen sind. Damit sind kleinere "-", mittlere "0" und größere "+" Durchmesser auf den ersten Blick erkennbar.With regard to the presentation according to Fig. 5 It should be pointed out that, for easier understanding, the free spring turns of the outer section 18 and the inner section 16 are provided with the symbol "0", that the guide turns 9b of the inner section 16 are provided with the symbol "-" and that the guide turns 9c of the outer section 18 are provided with the symbol "+". This means that smaller "-", medium "0" and larger "+" diameters can be recognized at first glance.

Es wurde weiter oben erläutert, dass der vorschlagsgemäße Spindelantrieb bei allen möglichen Verstellelementen 1 eines Kraftfahrzeugs Anwendung finden kann. In besonders bevorzugter Ausgestaltung handelt es sich bei dem Verstellelement 1 um eine Klappe, insbesondere um eine Heckklappe, um einen Heckdeckel, eine Tür, insbesondere eine Seitentür, um eine Motorhaube o. dgL eines Kraftfahrzeugs.It was explained further above that the proposed spindle drive can be used in all possible adjustment elements 1 of a motor vehicle can. In a particularly preferred embodiment, the adjusting element 1 is a flap, in particular a tailgate, a boot lid, a door, in particular a side door, a bonnet or the like of a motor vehicle.

Claims (14)

  1. Spindle drive for an adjustment element (1) of a motor vehicle, having a drive motor (2), a spindle/spindle nut transmission (3), connected downstream of the drive motor (2), for generating linear drive movements, and having two connections (4, 5) for diverting the drive movements, wherein at least one one-piece helical compression spring (8), aligned with the spindle longitudinal axis (7), for preloading the spindle drive, in particular into the extended position, is provided,
    characterized
    in that the helical compression spring (8) has spring coils (9) of different diameters for adapting it to the geometric conditions prevailing in the spindle drive.
  2. Spindle drive according to Claim 1, characterized in that a housing (10) is provided, in which the spindle/spindle nut transmission (3), the helical compression spring (8) and preferably the drive motor (2) are arranged, preferably in that the housing (10) has an inner tube (10a) connected to one of the two connections (4) and an outer tube (10b) that is connected to the other connection (5) in each case and is displaceable telescopically with respect to the inner tube (10a).
  3. Spindle drive according to Claim 1 or 2, characterized in that the spindle (11) of the spindle/spindle nut transmission (3) is mounted in a rotatable and axially fixed manner with respect to one of the two connections (4, 5), in particular to the connection (4) connected to the inner tube (10a), in that the spindle nut (12) of the spindle/spindle nut transmission (3) is connected to the other connection (5) in each case, in particular the connection (5) connected to the outer tube (10b), via a guide tube (13), and in that a spindle portion is located outside the guide tube (13) and a spindle portion is located inside the guide tube.
  4. Spindle drive according to one of the preceding claims, characterized in that the helical compression spring (8) extends at least along a length portion of the spindle (11), preferably substantially along the entire length of the spindle (11), in a manner in each case enclosing the spindle (11), and/or in that the helical compression spring (8) extends at least along a length portion of the guide tube (13), preferably substantially along the entire length of the guide tube (13), in a manner in each case enclosing the guide tube (13).
  5. Spindle drive according to one of the preceding claims, characterized in that the spindle nut (12) and/or the guide tube (13) and/or a guide sleeve surrounding the guide tube (13) form(s) at the end a spindle nut shoulder (14) that defines a radial shoulder directed towards the spindle (11), and in that the adjustment of the spindle drive is accompanied by an axial displacement of the spindle nut shoulder (14) relative to the spring coils (9) of the helical compression spring (8).
  6. Spindle drive according to one of Claims 2 to 5, characterized in that the inner tube (10a) forms at the end a housing shoulder (15) that defines a radial shoulder directed towards the outer tube (10b), and in that the adjustment of the spindle drive is accompanied by an axial displacement of the housing shoulder (15) relative to the spring coils (9) of the helical compression spring (8).
  7. Spindle drive according to one of the preceding claims, characterized in that the helical compression spring (8) has length portions that have, at least in part, different mean diameters, such that the helical compression spring (8) remains free of predetermined parts of the spindle drive, in particular of the spindle nut shoulder (14) and/or the housing shoulder (15), preferably in that the helical compression spring (8) has an inner portion (16) that defines a length portion of smaller mean diameter and, adjoining the latter at a transition point or via a transition portion (17), has an outer portion (18) that defines a length portion of greater mean diameter, preferably in that the mean diameter of the transition portion (17) lies between the mean diameter of the inner portion (16) and the mean diameter of the outer portion (18).
  8. Spindle drive according to Claim 5 and optionally according to Claim 6 or 7, characterized in that the spindle nut shoulder (14), in the extended position, is located in the outer portion (18) or in the transition portion (17) or in the region of the transition point, and preferably in that the spindle nut shoulder (14), in the retracted position, is located in the outer portion (18) such that the spindle nut shoulder (14) remains free of the helical compression spring (8) even in the case of a slight lateral bulging of the helical compression spring (8) associated with the tensioning of the helical compression spring (8).
  9. Spindle drive according to Claim 6 and optionally according to Claim 7 or 8, characterized in that the housing shoulder (15), in the extended position, is located in the inner portion (18) or in the transition portion (17), and preferably in that the housing shoulder (15), in the retracted position, is located in the inner portion (16) such that the housing shoulder (15) remains free of the helical compression spring (8) even in the case of a slight lateral bulging of the helical compression spring (8) associated with the tensioning of the helical compression spring (8).
  10. Spindle drive according to Claims 3 and 7 and optionally according to Claim 8 or 9, characterized in that the guide tube (13) forms a guide face (19) for a length portion (16), in particular the inner portion (16) of the helical compression spring (8), and the housing inner wall, in particular the inner face of the inner tube (10a), forms a guide face (20) for another length portion (18), in particular the outer portion (18) of the helical compression spring (8).
  11. Spindle drive according to one of the preceding claims, characterized in that the helical compression spring (8) has at least one coil pattern, in that at least one length portion (17) has a coil pattern with spring coils of constant diameter, and/or in that at least one length portion (16, 17) has a coil pattern with spring coils (9) having periodically alternating different diameters.
  12. Spindle drive according to one of the preceding claims, characterized in that at least one length portion (16, 18) of the helical compression spring (8) has guide coils (9b, 9c) that, in order to guide the helical compression spring (8), are in engagement with or are able to be brought into engagement with a guide face (19, 20), and in that this length portion (16, 18) otherwise has free spring coils (9a) that are radially set back with respect to the guide face (19, 20) and are not engaged with the guide face (19, 20), preferably in that the outer portion (18) of the helical compression spring (8) has guide coils (9c) and free spring coils (9a) and in that a housing inner wall, in particular the inner face of the inner tube (10a), provides the guide face (20) assigned to these guide coils (9c), and/or in that the inner portion (16) of the helical compression spring (8) has guide coils (9b) and free spring coils (9a) and in that the outer face of the guide tube (13) provides the guide face (19) assigned to these guide coils (9b).
  13. Spindle drive according to Claim 12, characterized in that, in each particular length portion (16, 18) of the helical compression spring (8), the number of free coils (9a) is greater than the number of guide coils (9b, 9c), preferably in that the ratio of the number of free spring coils (9a) to the number of guide coils (9b, 9c) is in a range between 3:1 and 5:4, in particular in a range between 2:1 and 3:2.
  14. Spindle drive according to one of the preceding claims, characterized in that the adjustment element (1) is a tailgate, a boot lid, a door, in particular a side door, a bonnet or the like of a motor vehicle.
EP10001968.6A 2009-03-03 2010-02-26 Spindle drive for a mobile element of a motor vehicle Active EP2226453B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202009006216U DE202009006216U1 (en) 2009-03-03 2009-03-03 Spindle drive for an adjusting element of a motor vehicle

Publications (3)

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EP2226453A2 EP2226453A2 (en) 2010-09-08
EP2226453A3 EP2226453A3 (en) 2014-04-02
EP2226453B1 true EP2226453B1 (en) 2020-08-05

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EP10001968.6A Active EP2226453B1 (en) 2009-03-03 2010-02-26 Spindle drive for a mobile element of a motor vehicle

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EP (1) EP2226453B1 (en)
DE (1) DE202009006216U1 (en)
HU (1) HUE050760T2 (en)

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DE102010062222A1 (en) * 2010-11-30 2012-05-31 Bayerische Motoren Werke Aktiengesellschaft Tailgate of motor vehicle, has cylinder with piston rod that is connected to intermediate portion and is articulated so that flap opening in wall portion is opened or closed
DE202010016474U1 (en) 2010-12-10 2012-03-13 BROSE SCHLIEßSYSTEME GMBH & CO. KG Spindle drive for an adjusting element of a motor vehicle
DE202013004785U1 (en) * 2013-05-24 2014-08-27 BROSE SCHLIEßSYSTEME GMBH & CO. KG Drive arrangement for the motorized adjustment of an adjusting element of a motor vehicle
DE102013111323A1 (en) * 2013-10-14 2015-04-16 Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Hallstadt Drive arrangement for an adjusting element of a motor vehicle
US9103373B1 (en) 2014-04-30 2015-08-11 Hi-Lex Controls, Inc. Bearing-shaft assembly with bearing and method of attaching a bearing to a shaft
DE102014117454B4 (en) 2014-11-27 2022-04-14 Brose Fahrzeugteile Se & Co. Kommanditgesellschaft, Bamberg Spindle drive for a closure element of a motor vehicle
DE102015106356A1 (en) 2014-11-27 2016-06-02 Brose Fahrzeugteile Gmbh & Co. Kg, Hallstadt Spindle drive for a closure element of a motor vehicle
DE102016103800A1 (en) * 2016-03-03 2017-09-07 Brose Fahrzeugteile Gmbh & Co. Kg, Bamberg Drive arrangement of a flap arrangement of a motor vehicle
DE102017115019A1 (en) 2017-07-05 2019-01-10 Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Bamberg Spindle drive for a closure element of a motor vehicle
CN108092460B (en) * 2017-10-20 2020-04-14 上海万超汽车天窗有限公司 Motor assembly with buffer sleeve for electric support rod
DE102019100751A1 (en) 2018-01-15 2019-07-18 Magna Closures Inc. Closing panel extension mechanism with multiple springs
DE202018103482U1 (en) 2018-06-20 2018-07-02 Edscha Engineering Gmbh Drive device and spring part for a drive device
DE102018117889A1 (en) * 2018-07-24 2020-01-30 Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Bamberg spindle drive
DE102019105456A1 (en) * 2019-03-04 2020-09-10 Brose Fahrzeugteile Se & Co. Kommanditgesellschaft, Bamberg Spindle drive for a closure element of a motor vehicle

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US4423535A (en) 1981-03-31 1984-01-03 Nhk Spring Co., Ltd. Spring balancer
DE202005008222U1 (en) 2005-05-25 2006-01-26 Innotec Forschungs- Und Entwicklungs-Gmbh Spring assembly for telescopic flap drive, has inner and outer springs connected to connector, where assembly is provided as single unit, and guiding unit extending to certain extent from connector into inner spring
DE102004040170A1 (en) 2004-08-18 2006-03-02 Siemens Ag Opening and closing device for rotatably driven motor vehicle part has spindle nut or threaded spindle that is rotatably driven by drive motor and threaded spindle or spindle nut that is fixed
DE202005003466U1 (en) 2005-03-01 2006-07-13 Brose Schließsysteme GmbH & Co.KG Adjusting system for adjusting the tailgate of a motor vehicle comprises a first housing and a second housing, a spindle for adjusting the housings, an electric motor and gearing system and springs
DE102005009213A1 (en) 2005-02-25 2006-09-07 Thyssenkrupp Bilstein Suspension Gmbh Hydraulic vibration damper with kink-proof rebound stop spring
EP1840310A1 (en) 2006-03-31 2007-10-03 Valeo Sicherheitssysteme GmbH Adjusting device having a spindle drive
DE202006015153U1 (en) 2006-10-10 2008-02-28 Kiekert Ag Damper drive for motor vehicles in particular

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US4318535A (en) 1978-10-14 1982-03-09 Kayabakogyokabushikikaisha Rear wheel suspension for motorcycles
US4423535A (en) 1981-03-31 1984-01-03 Nhk Spring Co., Ltd. Spring balancer
DE102004040170A1 (en) 2004-08-18 2006-03-02 Siemens Ag Opening and closing device for rotatably driven motor vehicle part has spindle nut or threaded spindle that is rotatably driven by drive motor and threaded spindle or spindle nut that is fixed
DE102005009213A1 (en) 2005-02-25 2006-09-07 Thyssenkrupp Bilstein Suspension Gmbh Hydraulic vibration damper with kink-proof rebound stop spring
DE202005003466U1 (en) 2005-03-01 2006-07-13 Brose Schließsysteme GmbH & Co.KG Adjusting system for adjusting the tailgate of a motor vehicle comprises a first housing and a second housing, a spindle for adjusting the housings, an electric motor and gearing system and springs
DE202005008222U1 (en) 2005-05-25 2006-01-26 Innotec Forschungs- Und Entwicklungs-Gmbh Spring assembly for telescopic flap drive, has inner and outer springs connected to connector, where assembly is provided as single unit, and guiding unit extending to certain extent from connector into inner spring
EP1840310A1 (en) 2006-03-31 2007-10-03 Valeo Sicherheitssysteme GmbH Adjusting device having a spindle drive
DE202006015153U1 (en) 2006-10-10 2008-02-28 Kiekert Ag Damper drive for motor vehicles in particular

Also Published As

Publication number Publication date
DE202009006216U1 (en) 2010-07-22
EP2226453A3 (en) 2014-04-02
HUE050760T2 (en) 2021-01-28
EP2226453A2 (en) 2010-09-08

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