EP2226453A2 - Spindle drive for a mobile element of a motor vehicle - Google Patents
Spindle drive for a mobile element of a motor vehicle Download PDFInfo
- Publication number
- EP2226453A2 EP2226453A2 EP10001968A EP10001968A EP2226453A2 EP 2226453 A2 EP2226453 A2 EP 2226453A2 EP 10001968 A EP10001968 A EP 10001968A EP 10001968 A EP10001968 A EP 10001968A EP 2226453 A2 EP2226453 A2 EP 2226453A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- spindle
- helical compression
- compression spring
- guide
- spindle drive
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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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
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- 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
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05Y—INDEXING SCHEME RELATING TO HINGES OR OTHER SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS AND DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION, CHECKS FOR WINGS AND WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05Y2201/00—Constructional elements; Accessories therefore
- E05Y2201/40—Motors; Magnets; Springs; Weights; Accessories therefore
- E05Y2201/47—Springs; Spring tensioners
- E05Y2201/474—Compression springs
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05Y—INDEXING SCHEME RELATING TO HINGES OR OTHER SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS AND DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION, CHECKS FOR WINGS AND WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05Y2201/00—Constructional elements; Accessories therefore
- E05Y2201/60—Suspension or transmission members; Accessories therefore
- E05Y2201/622—Suspension or transmission members elements
- E05Y2201/696—Screw mechanisms
- E05Y2201/702—Spindles; Worms
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05Y—INDEXING SCHEME RELATING TO HINGES OR OTHER SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS AND DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION, CHECKS FOR WINGS AND WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05Y2800/00—Details, accessories and auxiliary operations not otherwise provided for
- E05Y2800/40—Protection
- E05Y2800/422—Protection against vibration or noise
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05Y—INDEXING SCHEME RELATING TO HINGES OR OTHER SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS AND DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION, CHECKS FOR WINGS AND WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05Y2900/00—Application of doors, windows, wings or fittings thereof
- E05Y2900/50—Application of doors, windows, wings or fittings thereof for vehicles
- E05Y2900/53—Application of doors, windows, wings or fittings thereof for vehicles characterised by the type of wing
- E05Y2900/546—Tailgates
Definitions
- the present invention relates to a spindle drive for an adjusting element of a motor vehicle according to the preamble of claim 1 and to a helical compression spring of such a spindle drive according to claim 19.
- the present spindle drive can be used for all possible adjustment of a motor vehicle application.
- Examples include a flap, in particular a tailgate, a trunk lid, a hood, a side door, a cargo compartment lid, a lifting roof o. Dg1. of a motor vehicle.
- a well-known spindle drive ( DE 20 2005 003 466 Ul ), from which the invention proceeds, is used to adjust a tailgate of a motor vehicle.
- the spindle drive is equipped with a drive motor and a spindle spindle nut transmission connected downstream of the drive motor for generating drive movements.
- two connections are provided, which are biased by means of several one-piece helical compression springs against each other.
- the spindle nut is connected to a guide tube, which serves on the one hand the leadership of the spindle nut protruding through the spindle and on the other hand serves via a guide sleeve of the guide of the helical compression springs.
- the invention is based on the problem to design the known spindle drive and further develop that the interaction between the helical compression spring and the spindle drive is otherwise optimized.
- the above adaptation of the helical compression spring is due to the fact that the helical compression spring has longitudinal sections which have at least partially different average diameters.
- the helical compression spring can be designed specifically for each free space.
- the helical compression spring is provided with guide windings, which are for guiding the helical compression spring in engagement with a guide surface or can be brought and that the remaining spring coils of the guide surface are free windings.
- guide coils replace cost-effective guide sleeves, which previously served to adapt the prevailing geometric conditions in the spindle drive to the coil spring.
- the spindle drive shown in the drawing serves for the motorized adjustment of an adjusting element 1 designed as a tailgate. Although this is advantageous, it should not be understood as limiting. Rather, the proposed spindle drive can be used for all possible adjusting elements of a motor vehicle, as will be explained below.
- the spindle drive is equipped with a drive motor 2, a spindle spindle nut transmission 3 connected downstream of the drive motor 2 for generating linear drive movements and with two connections 4, 5 for discharging the drive movements.
- a drive motor 2 and the spindle spindle nut gear 3 is here and preferably one in particular as a planetary gear ausgestaltetes intermediate gear 6 connected, which plays no role for the proposed solution.
- the spindle drive has an aligned on the spindle longitudinal axis 7, one-piece helical compression spring 8, which serves the bias of the spindle drive here and preferably in the extended position.
- 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 application of the motorized adjustment of tailgates. It counteracts the weight of the tailgate 1.
- the helical compression spring 8 is designed with respect to the weight of the tailgate 1 so that the resulting state comes as close as possible to an equilibrium state.
- several, in particular different helical compression springs 8 may be provided. The following is representative of possibly more helical compression springs 8 only from a single helical compression spring 8 the speech.
- the proposed helical compression spring 8 deviates from the usual embodiment in so far as it has spring coils 9 of different diameters. This can be realized on the one hand length sections of different diameters, over which the helical compression spring 8 can be adapted to the available space. It is also conceivable that the helical compression spring 8 itself can be equipped with geometries for their own leadership. In all cases, it is so that the equipment of the helical compression spring 8 with spring coils 9 of different diameters serves to optimally adapt the helical compression spring 8 to the geometric conditions prevailing in the spindle drive.
- the Fig. 2 and 3 show that the proposed spindle drive has a housing 10 in which the spindle spindle nut transmission 3, the helical compression spring 8 and the drive motor 2 are arranged. Accordingly, the above-mentioned intermediate gear 6 in the housing 10.
- the drive motor 2 and / or the intermediate gear 6 and other drive components and clutches o. The like. Outside the housing 10 may be arranged. Possibly. Then another housing for these drive components is provided.
- FIG. 2 shows that the housing 10 has an inner tube 10a connected to one of the two ports 4 and an outer tube 10b which is telescopically connected to the respective other port 5 and which is displaceable relative to the inner tube 10a.
- the spindle 11 of the spindle-spindle nut transmission 3 is axially fixed and rotatably mounted opposite one of the two ports 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 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, whereby depending on the position of the spindle drive a spindle section outside the guide tube 13 and a spindle section is located within the guide tube 13.
- the helical compression spring 8 surrounds the spindle 11 and extends substantially over the entire length of the spindle 11. It is conceivable that the helical compression spring 8 extends only over a longitudinal portion of the spindle 11. In the illustrated embodiment, it 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. Again, it may be provided that the helical compression spring 8 extends only over a longitudinal section of the guide tube 13.
- the guide tube 13 forms on the inside an additional guide for the spindle 11 of the spindle spindle nut transmission 3.
- the spindle 11 is end equipped with a sliding element 11a.
- the guide tube 13 also serves with its outside of the leadership of the helical compression spring 8. It can be a Synopsis of Fig. 2 and 3 see that the guide tube 13 counteracts a buckling of the helical compression spring 8.
- the guide tube 13, as basically known from the prior art be surrounded by a guide sleeve, not shown.
- spindle nut heel It can be the detail view in Fig. 2 It can be seen that the spindle nut 12 together with the guide tube 13 ends forms a radial, directed towards the spindle 11 paragraph 14, which is hereinafter referred to as "spindle nut heel". It can also be seen from this illustration that the spindle nut shoulder 14 is exposed to the helical compression spring 8 and that an axial displacement of the spindle nut shoulder 14 relative to the spring coils 9 of the helical compression spring 8 is associated with the adjustment of the spindle drive.
- the inner tube 10a forms on the end a radial shoulder 15 directed toward the outer tube 10b, which is referred to below as the "housing shoulder". Again, it is such that with the adjustment of the spindle drive an axial displacement of the housing paragraph 15 is associated relative to the spring coils 9 of the helical compression spring 8.
- FIG. 2 shows that the inner tube 10a is the end face with the outer tube 10b in the sense of a rotation lock positively engaged. This is addressed here only in terms of a complete presentation and is not relevant to 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 free of predetermined parts of the spindle drive, here and preferably from the spindle nut shoulder 14 and the Housing paragraph 15, remains. This will now be explained in detail.
- the helical compression spring 8 has a longitudinal section 16 of smaller average diameter, which is referred to below as the “inner section”. At the inner portion 16, a longitudinal section closes via a transition section 17 18 larger average diameter, which is hereinafter referred to as "outer portion”.
- the transition section 17 can in principle also be omitted, so that the transition between the inner portion 16 and the outer portion 18 then takes place only at a transition point.
- the spindle nut shoulder 14 is located in the transition section 17.
- the spindle nut shoulder 14 is already in a relative to the inner portion 16 expanded longitudinal section of the helical compression spring 8, so that the radial distance between the spindle nut shoulder 14 and the spring coils 9 is increased accordingly.
- retracted position of the spindle drive of the spindle nut paragraph 14 is located even in the additionally widened outer portion 18. This reduces the risk of entanglement between the spindle nut shoulder 14 and the spring coils 9.
- the spindle nut shoulder 14 remains free even when the lateral bulging of the helical compression spring 8 is due to the tensioning of the helical compression spring 8 from the helical compression spring 8.
- the guide tube 13 then forms a guide surface 19 for the inner portion 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 portion (18) of the helical compression spring (8).
- the guidance of the helical compression spring 8 can be influenced in particular by the respectively realized winding pattern.
- Each longitudinal section 16, 17, 18 is basically equipped with such a winding pattern. This also applies to the case that the helical compression spring 8 at all only consists of a single length.
- the winding pattern describes in the present sense the course of the diameter of the spring coils 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 turns of constant diameter.
- the outer portion 18 and the inner portion 16, however, have winding patterns with turns of periodically alternating different diameters. The reason for this is clear from the following explanations.
- the inner portion 16 and the outer portion 18 of the helical compression spring 8 have guide windings 9b, 9c, which are for guiding the helical compression spring 8 in engagement with a respective guide surface 19, 20 or can be brought.
- the remaining spring coils 9a of the two sections 16, 18 are designed as free spring coils, which are set back radially with respect to the respective guide surface 19, 20 and thus are disengaged from the respective guide surface 19, 20.
- the free spring coils 9a of the inner portion 16 are radially outward, the free spring coils 9a of the outer portion 18 are set back radially inward.
- 9a of the inner portion 16 and the outer portion 18 in absolute terms substantially identical.
- the guide surfaces 19, 20 are formed here and preferably 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 configuration of the spindle drive.
- the outer section 18 of the helical compression spring 8 now has guide turns 9c and free turns 9a, wherein here and preferably the inner surface of the inner tube 10a provides the guide surface 20 associated with these guide turns 9c.
- the inner portion 16 of the helical compression spring 8 has guide turns 9b and free spring coils 9a, and the outer surface of the guide tube 13 provides the guide surface 19 associated with these guide coils 9b.
- Fig. 5 are shown by the guide tube 13 on the one hand and the inner tube 10a on the other hand provided guide surfaces 19, 20 shown schematically. From this illustration, it can be seen that the guide coils 9b of the inner portion 16 are engaged with the guide surface 19 provided by the guide tube 13 and that the guide coils 9c of the outer portion 18 are engaged with the guide surface 20 provided by the inner tube 10a.
- the number of free turns 9a is much larger 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 is 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 coils 9 does not come into engagement with the guide surfaces 19, 20 at all, which has advantageous effects on the development of noise.
- a look at the illustration 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, attributable to the transition section 17 guide surfaces in any case with extended spindle drive in the region of the guide tube 13, the spindle nut paragraph 14 and in the housing inner wall, the housing paragraph 15.
- the transition section 17 preferably has a winding pattern with a constant diameter for all windings.
- the diameter of the spring coils 9a of the transitional section 17 preferably corresponds to the diameter of the free turns 9a of the outer section 18 and of 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 trunk lid, a door, in particular a side door, an engine hood or the like of a motor vehicle.
- the self-importance, the helical compression spring 8 of the proposed spindle drive is claimed as such. Reference may be made to the above statements, insofar as these are suitable for describing the proposed helical compression spring 8.
Abstract
Description
Die vorliegende Erfindung betrifft einen Spindelantrieb für ein Verstellelement eines Kraftfahrzeugs gemäß dem Oberbegriff von Anspruch 1 sowie eine Schraubendruckfeder eines solchen Spindelantriebs gemäß Anspruch 19.The present invention relates to a spindle drive for an adjusting element of a motor vehicle according to the preamble of claim 1 and to a helical compression spring of such a spindle drive according to claim 19.
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. dg1. eines Kraftfahrzeugs.The present spindle drive can be used for all possible adjustment of a motor vehicle application. Examples include a flap, in particular a tailgate, a trunk lid, a hood, a side door, a cargo compartment lid, a lifting roof o. Dg1. of a motor vehicle.
Ein bekannter Spindelantrieb (
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 serves on the one hand the leadership of the spindle nut protruding through the spindle and on the other hand serves via a guide sleeve of the guide of the helical compression springs.
Bei der Verstellung des bekannten Spindelantriebs in die eingefahrene Stellung ist stets ein jedenfalls geringfügiges seitliches Ausbeulen der Schraubendruckfedern 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.In the adjustment of the known spindle drive in the retracted position is always a slight lateral buckling of the helical compression springs observed, which is intercepted in the above helical compression spring on the guide sleeve. The bulging can in principle lead to problems in the end region of the guide sleeve in which the guide sleeve together with the guide tube and the spindle nut forms a directed towards the spindle paragraph. If the helical compression spring comes through the above bulging into engagement with this paragraph, it can cause snagging and in the further adjustment of the spindle drive to cracking noise come. This noise is seen by the user as a loss of comfort.
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 to design the known spindle drive and further develop that the interaction between the helical compression spring and the spindle drive is otherwise 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 realize that by equipping the helical compression spring with spring coils of different diameters in a simple way an adjustment of the helical compression spring to the prevailing geometrical conditions in the spindle drive is possible. An elaborate adaptation of these geometric conditions, for example by the use of additional guide sleeves o. The like., Can be omitted 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
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
Nach einer weiteren Lehre gemäß Anspruch 15, der ebenfalls eigenständige Bedeutung zukommt, wird die Schraubendruckfeder des vorschlagsgemäßen Spindelantriebs als solche beansprucht. Auf alle Ausführungen, die geeignet sind, die beanspruchte Schraubenfeder zu erläutern, darf verwiesen werden.According to another teaching according to
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 vorschlags gemäßen 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 eingefahrene 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 An sicht A und - Fig. 6
- die Schraubendruckfeder gemäß
Fig. 4 in einer perspektivischen Ansicht.
- Fig. 1
- in a very schematic representation of the rear area of a motor vehicle with a tailgate, which is equipped with a proposal according to the 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 serves for the motorized adjustment of an adjusting element 1 designed as a tailgate. Although this is advantageous, it should not be understood as limiting. Rather, the proposed spindle drive can be used for all possible adjusting elements of a motor vehicle, as will be explained 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
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 Schraubendruckfedern Anwendung finden.The spindle drive has an aligned on the spindle
Der Schraubendruckfeder 8 des vorschlagsgemäßen Spindelantriebs kommt insbesondere im Anwendungsbereich der motorischen Verstellung von Heckklappen 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 Schraubendruckfedern 8 vorgesehen sein. Im Folgenden ist stellvertretend für ggf. mehrere Schraubendruckfedern 8 nur von einer einzigen Schraubendruckfeder 8 die Rede.The
Es lässt sich den Darstellungen in den
Um die vorschlagsgemäße Lehre besser darstellen zu können, werden zunächst die oben angesprochenen, im Spindelantrieb herrschenden geometrischen Gegebenheiten erläutert.In order to better represent the proposed teaching, the above-mentioned, prevailing in the spindle drive geometric conditions are first explained.
Die
Die Detaildarstellung in
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 Spindelabschnitt außerhalb des Führungsrohrs 13 und ein Spindelabschnitt innerhalb des Führungsrohrs 13 gelegen ist.The
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 Ausführungsbeispiel 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
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 11a ausgestattet. Das Führungsrohr 13 dient darüber hinaus mit seiner Außenseite der Führung der Schraubendruckfeder 8. Es lässt sich einer Zusammenschau der
Es lässt sich der Detailansicht in
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 15 relativ zu den Federwindungen 9 der Schraubendruckfeder 8 einhergeht.In addition to the
Die Detailansicht in
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 now essential that the
Es lässt sich am besten den Darstellungen in
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 mean diameter of the
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
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.Similarly good results can be achieved that the
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
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.Thus, with a suitable design of the
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
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
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.The winding pattern describes in the present sense the course of the diameter of the spring coils 9 over the length of the
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
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
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 formed here and preferably by a housing inner wall, in particular by the inner surface of the
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
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.Further, it is such that the
In
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
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
Vor allem wird aus der Darstellung in
Ein Blick auf die Darstellung in
Im Hinblick auf die Darstellung gemäß
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 has been explained 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 trunk lid, a door, in particular a side door, an engine hood or the like of a motor vehicle.
Nach einer weiteren Lehre, der eigenständige Bedeutung zukommt, wird die Schraubendruckfeder 8 des vorschlagsgemäßen Spindelantriebs als solche beansprucht. Auf die obigen Ausführungen darf verwiesen werden, soweit diese geeignet sind, die vorschlagsgemäße Schraubendruckfeder 8 zu beschreiben.According to another teaching, the self-importance, the
Claims (15)
dadurch gekennzeichnet,
dass die Schraubendruckfeder (8) zu deren Anpassung an die im Spindelantrieb herrschenden geometrischen Gegebenheiten Federwindungen (9) unterschiedlichen Durchmessers aufweist.Spindle drive for an adjusting element (1) of a motor vehicle with a drive motor (2), a spindle spindle nut transmission (3) connected downstream of the drive motor (2) for generating linear drive movements and with two connections (4, 5) for discharging the drive movements, at least one on the spindle longitudinal axis (7) aligned, one-piece helical compression spring (8) is provided for biasing the spindle drive, in particular in the extended position,
characterized,
in that the helical compression spring (8) has spring diameters (9) of different diameters in order to adapt it to the geometric conditions prevailing in the spindle drive.
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)
Publication Number | Publication Date |
---|---|
EP2226453A2 true EP2226453A2 (en) | 2010-09-08 |
EP2226453A3 EP2226453A3 (en) | 2014-04-02 |
EP2226453B1 EP2226453B1 (en) | 2020-08-05 |
Family
ID=42226639
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10001968.6A Active EP2226453B1 (en) | 2009-03-03 | 2010-02-26 | Spindle drive for a mobile element of a motor vehicle |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2226453B1 (en) |
DE (1) | DE202009006216U1 (en) |
HU (1) | HUE050760T2 (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
WO2015055484A1 (en) * | 2013-10-14 | 2015-04-23 | Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Hallstadt | Drive arrangement for an adjustment element of a motor vehicle |
DE102014117454A1 (en) | 2014-11-27 | 2016-06-02 | Brose Fahrzeugteile Gmbh & Co. Kg, Hallstadt | 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 |
CN107630622A (en) * | 2017-10-20 | 2018-01-26 | 上海万超汽车天窗有限公司 | A kind of improved electric strut |
DE202018103482U1 (en) | 2018-06-20 | 2018-07-02 | Edscha Engineering Gmbh | Drive device and spring part for a drive device |
US10871019B2 (en) | 2018-01-15 | 2020-12-22 | Magna Closures Inc. | Closure panel extension mechanism with multiple springs |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
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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 |
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 |
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 |
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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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 |
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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 |
DE102005009213B4 (en) | 2005-02-25 | 2008-07-31 | Thyssenkrupp Bilstein Suspension Gmbh | Hydraulic vibration damper with kink-proof rebound stop spring |
DE202005007155U1 (en) * | 2005-05-02 | 2006-09-14 | Brose Schließsysteme GmbH & Co.KG | Spring support struts for vehicle rear door has pair of spring struts with paired springs in each strut adjusted by electric motor |
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 |
PL1840310T3 (en) | 2006-03-31 | 2011-05-31 | U Shin Deutschland Zugangssysteme Gmbh | Adjusting device having a spindle drive |
DE202006015153U1 (en) | 2006-10-10 | 2008-02-28 | Kiekert Ag | Damper drive for motor vehicles in particular |
-
2009
- 2009-03-03 DE DE202009006216U patent/DE202009006216U1/en not_active Expired - Lifetime
-
2010
- 2010-02-26 EP EP10001968.6A patent/EP2226453B1/en active Active
- 2010-02-26 HU HUE10001968A patent/HUE050760T2/en unknown
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
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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 |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
WO2015055484A1 (en) * | 2013-10-14 | 2015-04-23 | Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Hallstadt | Drive arrangement for an adjustment element of a motor vehicle |
DE102014117454A1 (en) | 2014-11-27 | 2016-06-02 | Brose Fahrzeugteile Gmbh & Co. Kg, Hallstadt | 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 |
WO2016083194A1 (en) | 2014-11-27 | 2016-06-02 | Brose Fahrzeugteile Gmbh & Co. Kg, Hallstadt | Spindle drive for a closure element of a motor vehicle |
DE102014117454B4 (en) | 2014-11-27 | 2022-04-14 | Brose Fahrzeugteile Se & Co. Kommanditgesellschaft, Bamberg | Spindle drive for a closure element of a motor vehicle |
CN107630622A (en) * | 2017-10-20 | 2018-01-26 | 上海万超汽车天窗有限公司 | A kind of improved electric strut |
US10871019B2 (en) | 2018-01-15 | 2020-12-22 | Magna Closures Inc. | Closure 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 |
Also Published As
Publication number | Publication date |
---|---|
DE202009006216U1 (en) | 2010-07-22 |
EP2226453A3 (en) | 2014-04-02 |
EP2226453B1 (en) | 2020-08-05 |
HUE050760T2 (en) | 2021-01-28 |
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