EP0352410B1 - Worm gear for angle adjustment of vertical lamellar blinds - Google Patents
Worm gear for angle adjustment of vertical lamellar blinds Download PDFInfo
- Publication number
- EP0352410B1 EP0352410B1 EP89107580A EP89107580A EP0352410B1 EP 0352410 B1 EP0352410 B1 EP 0352410B1 EP 89107580 A EP89107580 A EP 89107580A EP 89107580 A EP89107580 A EP 89107580A EP 0352410 B1 EP0352410 B1 EP 0352410B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- worm
- drive according
- worm drive
- snap sleeve
- hooks
- 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.)
- Expired - Lifetime
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
- E06B9/24—Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; Slat blinds
- E06B9/26—Lamellar or like blinds, e.g. venetian blinds
- E06B9/36—Lamellar or like blinds, e.g. venetian blinds with vertical lamellae ; Supporting rails therefor
- E06B9/362—Travellers; Lamellae suspension stems
- E06B9/364—Operating mechanisms therein
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S160/00—Flexible or portable closure, partition, or panel
- Y10S160/90—Vertical type venetian blind
Definitions
- the invention relates to a worm drive for adjusting the angular position of vertical louvre blinds with a vertical axis arranged within a lamellar carrier housing, which carries a pinion connected to it in a rotationally fixed manner and is connected at the end to a lamella, the worm being in drive engagement with the pinion by means of a worm rotatable via an inner profile by a drive shaft.
- Vertical blinds generally serve as sun and / or privacy screens for windows. However, they can also be used for other purposes, such as for subdivision or division of larger rooms.
- Their generally made of textile material, strip-shaped, vertically arranged slats are each fastened at least at their upper end to a slat carrier and can generally be pivoted about a central longitudinal axis, it being possible for all slats of a vertical blind to be pivoted together by means of a common drive.
- the plate carriers are generally held in a mounting rail and can be moved along this by means of a drive.
- the slats In the open position, in which the window is not covered by the slats, the slats are practically moved together on one side to form a package, the slats running parallel to one another.
- the angular position of the individual lamellae is adjusted by means of a common drive, which generally has the shape of a drive shaft, which is in positive engagement with screws mounted in the lamella carrier housings.
- the vertical axis on which the lamella is held carries a pinion which meshes with the worm, so that the rotation of the drive shaft Angular position of the slat is adjustable.
- the invention has for its object to design the worm drive of the type mentioned in such a way that simple assembly is made possible without the use of special tools and without the risk of a housing breakage.
- the overall depth of the disk carrier housing is to be reduced in order to reduce its expansion in the direction of the mounting rail, in particular when the disk pack is moved together.
- the worm has an axial central opening and is held by means of a snap sleeve on a tubular socket-shaped projection of the disk carrier housing. Thanks to this configuration, the assembly in a very simple way.
- the worm is pushed with its central opening onto the tube-shaped projection, which could also be referred to as a hub, whereupon the snap sleeve is inserted, which rotatably holds the worm on the hub.
- the front wall of the housing can be completely eliminated. In addition to the significantly simplified assembly, this also results in material savings.
- a further considerable advantage of the design according to the invention is that the worm is now held on a hub and no longer on the end of pins or flanges. As a result, the overall depth of the disk carrier housing can be reduced considerably, so that the space requirement of the retracted disk pack is considerably reduced.
- the worm has a circumferential internal toothing which is in engagement with an outer profile of the snap sleeve.
- the outer profile engages in the toothing of the worm and transmits the torque from the drive shaft via the worm to the pinion on the vertical axis.
- the profiling of the snap sleeve slides along the internal toothing of the screw under a certain resistance. A slip clutch is thus formed, which allows the drive shaft to be overtightened without damage.
- the internal toothing of the worm is preferably arranged in a circumferential recess, while the outer profile of the snap sleeve is formed by cams directed outwards from its collar.
- the collar of the snap sleeve is thus able on the one hand to hold the screw on its hub, while the cams engage in the internal toothing of the screw on the peripheral edge.
- the cams are advantageously held on a spring clip, which expediently from a cut-out part of the federal government Snap sleeve exist.
- the cams can thus yield radially resiliently.
- the spring force is sufficient to transmit the torque required to rotate the slats. In the event of resistance, they spring over the internal toothing of the worm so that damage to the drive parts can be ruled out.
- the snap sleeve preferably carries axially held and radially resilient hooks which engage behind the disk carrier housing.
- the hooks When the snap sleeve is inserted into the tubular socket-shaped hub, the hooks spring together radially inwards. In the end position, the hooks spring back radially outwards and thus hold the snap sleeve and worm rotatably on the hub of the housing.
- a circumferential recess is advantageously provided concentrically with the hub, into which the hooks of the snap sleeve engage.
- the hooks do not protrude beyond the level of the rear housing wall, so that, accordingly, they do not contribute to an adverse increase in the overall depth of the housing.
- the end faces of the hooks are advantageously inclined outwards towards the collar of the snap sleeve.
- the inclined surfaces slide along the inlet opening and are thus pressed radially inwards. This considerably simplifies assembly, since only an axial pressure has to be applied to the snap sleeve in order to guide the hooks through the axial opening of the hub.
- the snap sleeve is provided with an inner projection which engages in a corresponding axial recess in the drive shaft.
- This preferably has Inner projection has a circular cross-sectional configuration, this profile engaging in a corresponding longitudinal recess in the drive shaft.
- the worm preferably comprises only one thread. This design facilitates the insertion of the vertical axis with the pinion formed in one piece with it.
- the vertical axis with its end bearing journal is initially inserted obliquely into two axially offset half bearing shells, whereupon the second bearing journal is latched into the lower second bearing shell provided with an axial slot by lateral pressure. With a slight turn, the pinion engages with the single thread of the worm.
- the pinion of the vertical axis, with which the worm is in engagement extends, according to one embodiment of the invention, only over a partial circumference of the vertical axis and is delimited on both sides by a stop. As soon as the worm comes into contact with one of the stops, the slip clutch between the snap sleeve and the worm comes into operation, so that a further rotation of the drive shaft has no effect.
- the disk carrier housing 10 is in contact with the inner profile of a mounting rail (not shown here) via slide guide 11, 12, 13 and 14 and is moved along the mounting rail via a manual or motor drive.
- a vertical axis 15 is rotatably mounted in the housing 10 and bears a lamella holder or a hook 16 at its lower end for receiving a bracket 18 held on the lamella 17.
- the vertical axis 15 comprises a pinion 19 formed with the same material, but which extends only over half the circumference of the vertical axis 15, since the lamella 17 itself should not be pivoted by more than an angle of 180 °.
- the pinion is delimited by at least one stop 20 on the circumference of the vertical axis 15.
- FIG. 2 shows, protrudes from the rear wall 21 of the disk carrier housing 10, which has no front end wall, a tube-shaped projection 22 forward into the interior of the housing 10, which forms the hub for the screw 23.
- the worm 23 comprises only a single thread 24.
- the diameter of the hub 22 is only slightly smaller than the inner diameter of the worm 23, so that it can easily turn on it.
- the worm 23 is held on the hub 22 of the housing 10 by means of a snap sleeve 25.
- Radially resilient hooks 26 extend through the axial recess of the hub 22 and spring radially outward into a circumferential recess 37 on the rear side of the rear wall 21 of the housing 10, as is clear from FIG. 1.
- FIG 3 shows the worm drive in the assembled state, the worm 23 being held firmly, but rotatably, on the hub by the snap sleeve 25.
- the vertical axis 15 is inserted obliquely into two axially offset bearing half-shells 27 of the housing 10, whereupon, as indicated by arrows in FIG. 3, the lower bearing journal 28 is latched into the lower bearing shell 29 provided with an axial slot by lateral pressure.
- the pinion 19 comes into engagement with the worm gear 24 of the worm 23.
- the front view of the snap sleeve 25 shown in FIG. 4 shows that it carries two cams 30 on the outer periphery of the collar which engage with the internal toothing 31 of the worm 23 shown in section in FIG. 6.
- the snap sleeve 25 is at a distance from the outer circumference with two one another opposite, circular arc-shaped recesses 32, whereby spring clips 33 are formed which carry the cams 30.
- the cams 30 are thus in resilient engagement with the internal toothing 31 of the worm 23, so that only a predetermined torque is transmitted.
- the snap sleeve 25 is also provided on its inside with a circular projection 34, for positive engagement with the drive shaft not shown in the drawings, which is provided with a corresponding longitudinal recess.
- the snap sleeve 25, starting from its collar, is provided with hooks 26 extending in the axial direction.
- the hooks 26 have an end surface 35 inclined towards the outside, which facilitates the insertion of the snap sleeve 25 into the hub 22, the hooks 26 being guided radially inwards.
- the worm 23 carries an annular flange 36 adjacent to the inner toothing 31, against which the snap sleeve 25 bears when it engages the worm 23 and the hub 22.
- FIG. 7 shows a section through the housing 10 with the worm drive mounted.
- the worm 23 is placed on the hub 22 and the snap sleeve 25 engages with its hooks 26 in the annular recess 37 on the back of the rear wall 21 of the housing 10.
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Gear Transmission (AREA)
- Blinds (AREA)
Description
Die Erfindung betrifft einen Schneckenantrieb zur Winkelpositionseinstellung von Vertikallamellenjalousien mit einer innerhalb eines Lamellenträgergehäuses angeordneten Vertikalachse, die ein hiermit drehfest verbundenes Ritzel trägt und endseitig mit einer Lamelle in Verbindung steht, wobei mit dem Ritzel eine über eine Innenprofilierung durch eine Antriebswelle drehbare Schnecke in Antriebseingriff steht.The invention relates to a worm drive for adjusting the angular position of vertical louvre blinds with a vertical axis arranged within a lamellar carrier housing, which carries a pinion connected to it in a rotationally fixed manner and is connected at the end to a lamella, the worm being in drive engagement with the pinion by means of a worm rotatable via an inner profile by a drive shaft.
Vertikaljalousien dienen, im allgemeinen als Sonnen- und/oder Sichtschutz für Fenster. Sie können jedoch auch für andere Zwecke, wie etwa zur Unter- oder Abteilung größerer Räume eingesetzt werden. Ihre im allgemeinen aus Textilmaterial bestehenden, streifenförmig ausgebildeten, vertikal angeordneten Lamellen sind jeweils wenigstens an ihrem oberen Ende an einem Lamellenträger befestigt und im allgemeinen um eine mittlere Längsachse schwenkbar, wobei ein gemeinsames Verschwenken sämtlicher Lamellen einer Vertikaljalousie mittels eines gemeinsamen Antriebes erfolgen kann. Die Lamellenträger sind im allgemeinen in einer Tragschiene gehalten und entlang dieser mittels eines Antriebes verfahrbar.Vertical blinds generally serve as sun and / or privacy screens for windows. However, they can also be used for other purposes, such as for subdivision or division of larger rooms. Their generally made of textile material, strip-shaped, vertically arranged slats are each fastened at least at their upper end to a slat carrier and can generally be pivoted about a central longitudinal axis, it being possible for all slats of a vertical blind to be pivoted together by means of a common drive. The plate carriers are generally held in a mounting rail and can be moved along this by means of a drive.
In der Öffnungsstellung, in welcher das Fenster von den Lamellen nicht abgedeckt ist, sind die Lamellen an einer Seite praktisch zu einem Paket zusammengefahren, wobei die Lamellen parallel zueinander verlaufen.In the open position, in which the window is not covered by the slats, the slats are practically moved together on one side to form a package, the slats running parallel to one another.
Die Einstellung der Winkelposition der einzelnen Lamellen erfolgt, wie bereits erwähnt wurde, mittels eines gemeinsamen Antriebes, der allgemein die Form einer Antriebswelle besitzt, die mit in den Lamellenträgergehäusen gelagerten Schnecken in einem formschlüssigen Eingriff stehen. Die Vertikalachse, an welcher die Lamelle gehalten ist, trägt ein Ritzel, welches mit der Schnecke kämmt, so daß über die Drehung der Antriebswelle die Winkelposition der Lamelle einstellbar ist.As already mentioned, the angular position of the individual lamellae is adjusted by means of a common drive, which generally has the shape of a drive shaft, which is in positive engagement with screws mounted in the lamella carrier housings. The vertical axis on which the lamella is held carries a pinion which meshes with the worm, so that the rotation of the drive shaft Angular position of the slat is adjustable.
Bei einem bekannten Antrieb dieser Art EP-A-0120567 ist die Schnecke mit ihren beiden Enden in der vorderen und der rückseitigen Wandung des Lamellenträgergehäuses gelagert. Für das Einsetzen der Schnecke in das Gehäuse muß dieses zunächst mit einem Werkzeug gespreizt werden, was nicht nur umständlich ist, sondern oftmals zu einem Bruch des Gehäuses führt. Darüber hinaus bedingt die Lagerung der Schnecke an zwei Endzapfen oder -flanschen eine tiefe Bauweise des Lamellenträgergehäuses. Dies wiederum hat die nachteilige Folge, daß in der Öffnungsstellung, also bei zusammengefahrenen Lamellen, ein relativ dickes Lamellenpaket entsteht, das insbesondere bei breiten Fenstern oder großen Raumteilern in unerwünschter Weise beachtliche Ausmaße einnimmt.In a known drive of this type EP-A-0120567 the screw is supported with its two ends in the front and the rear wall of the disk carrier housing. To insert the screw into the housing, this must first be spread with a tool, which is not only cumbersome, but often leads to the housing breaking. In addition, the mounting of the screw on two end journals or flanges requires a deep construction of the disk carrier housing. This in turn has the disadvantageous consequence that in the open position, that is to say when the slats are moved together, a relatively thick slat package is formed which, in particular in the case of wide windows or large room dividers, undesirably takes on considerable dimensions.
Angesichts dieser Problematik liegt der Erfindung die Aufgabe zugrunde, den Schneckenantrieb der eingangs genannten Art so auszugestalten, daß eine einfache Montage ermöglicht wird, ohne die Zuhilfenahme besonderer Werkzeuge und Ausschluß der Gefahr eines Gehäusebruchs. Gleichzeitig soll die Bautiefe des Lamellenträgergehäuses reduziert werden, um, insbesondere bei zusammengefahrenem Lamellenpaket, dessen Ausdehnung in Richtung der Tragschiene zu vermindern.In view of this problem, the invention has for its object to design the worm drive of the type mentioned in such a way that simple assembly is made possible without the use of special tools and without the risk of a housing breakage. At the same time, the overall depth of the disk carrier housing is to be reduced in order to reduce its expansion in the direction of the mounting rail, in particular when the disk pack is moved together.
Gelöst wird diese Aufgabe gemäß der Erfindung durch die im Kennzeichen des Hauptanspruches angegebenen Merkmale, wobei hinsichtlich bevorzugter Ausgestaltungen des Schneckenantriebes nach der Erfindung auf die Merkmale der Unteransprüche verwiesen wird.This object is achieved according to the invention by the features specified in the characterizing part of the main claim, reference being made to the features of the subclaims with regard to preferred configurations of the worm drive according to the invention.
Gemäß der Erfindung ist vorgesehen, daß die Schnecke eine axiale Mittelöffnung aufweist und mittels einer Schnapphülse auf einem rohrstutzenförmigen Vorsprung des Lamellenträgergehäuses gehalten ist. Dank dieser Ausgestaltung läßt sich die Montage in einer denkbar einfachen Weise vollziehen. Die Schnecke wird mit ihrer Mittelöffnung auf den rohrstutzenförmigen Vorsprung, der auch als Nabe bezeichnet werden könnte, aufgeschoben, worauf die Schnapphülse eingesetzt wird, die die Schnecke drehbar auf der Nabe hält. Bei dieser Bauweise kann die vordere Wandung des Gehäuses völlig wegfallen. Es ergibt sich somit neben der wesentlich vereinfachten Montage auch eine Materialersparnis. Schließlich liegt ein weiterer beachtlicher Vorteil der erfindungsgemäßen Ausbildung darin, daß die Schnecke nunmehr auf einer Nabe und nicht mehr endseitigen Zapfen oder Flanschen gehalten ist. Hierdurch läßt sich die Bautiefe des Lamellenträgergehäuses erheblich reduzieren, so daß der Raumbedarf des zusammengefahrenen Lamellenpaketes beträchtlich verringert ist.According to the invention it is provided that the worm has an axial central opening and is held by means of a snap sleeve on a tubular socket-shaped projection of the disk carrier housing. Thanks to this configuration, the assembly in a very simple way. The worm is pushed with its central opening onto the tube-shaped projection, which could also be referred to as a hub, whereupon the snap sleeve is inserted, which rotatably holds the worm on the hub. With this design, the front wall of the housing can be completely eliminated. In addition to the significantly simplified assembly, this also results in material savings. Finally, a further considerable advantage of the design according to the invention is that the worm is now held on a hub and no longer on the end of pins or flanges. As a result, the overall depth of the disk carrier housing can be reduced considerably, so that the space requirement of the retracted disk pack is considerably reduced.
Gemäß einer bevorzugten Ausführungsform des erfindungsgemäßen Schneckenantriebes trägt die Schnecke eine umlaufende Innenzahnung, die mit einer Außenprofilierung der Schnapphülse in Eingriff steht. Die Außenprofilierung greift in die Verzahnung der Schnecke ein und überträgt das Drehmoment von der Antriebswelle über die Schnecke auf das Ritzel der Vertikalachse. Bei einem Widerstand oder in Endstellung der Lamellenposition gleitet die Profilierung der Schnapphülse unter einem bestimmten Widerstand entlang der Innenzahnung der Schnecke. Es wird somit eine Rutschkupplung gebildet, die ein schadloses Überdrehen der Antriebswelle gestattet.According to a preferred embodiment of the worm drive according to the invention, the worm has a circumferential internal toothing which is in engagement with an outer profile of the snap sleeve. The outer profile engages in the toothing of the worm and transmits the torque from the drive shaft via the worm to the pinion on the vertical axis. In the event of resistance or in the end position of the slat position, the profiling of the snap sleeve slides along the internal toothing of the screw under a certain resistance. A slip clutch is thus formed, which allows the drive shaft to be overtightened without damage.
Vorzugsweise ist die Innenzahnung der Schnecke in einer umlaufenden Ausnehmung angeordnet, während die Außenprofilierung der Schnapphülse durch von ihrem Bund nach außen gerichteten Nocken gebildet ist. Der Bund der Schnapphülse vermag so einerseits die Schnecke auf ihrer Nabe festzuhalten, während die Nocken am umlaufenden Rand in die Innenzahnung der Schnecke eingreifen.The internal toothing of the worm is preferably arranged in a circumferential recess, while the outer profile of the snap sleeve is formed by cams directed outwards from its collar. The collar of the snap sleeve is thus able on the one hand to hold the screw on its hub, while the cams engage in the internal toothing of the screw on the peripheral edge.
Vorteilhaft sind die Nocken an einem Federbügel gehalten, der zweckmäßigerweise aus einem freigeschnittenen Teil des Bundes der Schnapphülse bestehen. Die Nocken können somit radial federnd nachgeben. Die Federkraft reicht aus, um das erforderliche Drehmoment zur Rotation der Lamellen zu übertragen. Bei einem Widerstand springen sie federnd über die Innenzahnung der Schnecke,so daß eine Beschädigung der Antriebsteile auszuschließen ist.The cams are advantageously held on a spring clip, which expediently from a cut-out part of the federal government Snap sleeve exist. The cams can thus yield radially resiliently. The spring force is sufficient to transmit the torque required to rotate the slats. In the event of resistance, they spring over the internal toothing of the worm so that damage to the drive parts can be ruled out.
Die Schnapphülse trägt bevorzugt in Axialrichtung gehaltene und in Radialrichtung federnde Haken, die das Lamellenträgergehäuse hintergreifen. Beim Einschieben der Schnapphülse in die rohrstutzenförmige Nabe drücken sich die Haken federnd radial nach innen zusammen. In der Endstellung federn die Haken radial nach außen zurück und halten somit Schnapphülse und Schnecke drehbar an der Nabe des Gehäuses fest.The snap sleeve preferably carries axially held and radially resilient hooks which engage behind the disk carrier housing. When the snap sleeve is inserted into the tubular socket-shaped hub, the hooks spring together radially inwards. In the end position, the hooks spring back radially outwards and thus hold the snap sleeve and worm rotatably on the hub of the housing.
Auf der Rückseite des Gehäuses ist konzentrisch zur Nabe vorteilhaft eine umlaufende Ausnehmung vorgesehen, in welche die Haken der Schnapphülse eingreifen. Die Haken ragen somit nicht über die Ebene der rückwärtigen Gehäusewandung hinaus, so daß sie dementsprechend auch nicht zu einer nachteiligen Erhöhung der Bautiefe des Gehäuses beitragen.On the back of the housing, a circumferential recess is advantageously provided concentrically with the hub, into which the hooks of the snap sleeve engage. The hooks do not protrude beyond the level of the rear housing wall, so that, accordingly, they do not contribute to an adverse increase in the overall depth of the housing.
Die Endflächen der Haken sind vorteilhaft nach außen zum Bund der Schnapphülse hin geneigt. Beim Einsetzen der Schnapphülse in die Nabe des Gehäuses gleiten die Schrägflächen an der Eingangsöffnung entlang und werden somit radial nach innen gedrückt. Hierdurch erleichtert sich die Montage erheblich, da lediglich ein axialer Druck auf die Schnapphülse aufzubringen ist, um die Haken durch die Axialöffnung der Nabe hindurchzuführen.The end faces of the hooks are advantageously inclined outwards towards the collar of the snap sleeve. When the snap sleeve is inserted into the hub of the housing, the inclined surfaces slide along the inlet opening and are thus pressed radially inwards. This considerably simplifies assembly, since only an axial pressure has to be applied to the snap sleeve in order to guide the hooks through the axial opening of the hub.
Vorzugsweise sind vier Haken jeweils um 90° zueinander versetzt an der Schnapphülse gehalten. Die Haltekraft verteilt sich somit symmetrisch und gleichmäßig. Die Schnapphülse ist mit einem Innenvorsprung versehen, der in eine entsprechende Axialausnehmung der Antriebswelle eingreift. Bevorzugt besitzt dieser Innenvorsprung eine im Querschnitt kreisausschnittförmige Ausbildung, wobei dieses Profil in eine korrespondierende Längsaussparung der Antriebswelle eingreift.Preferably, four hooks are held on the snap sleeve at 90 ° to each other. The holding force is thus distributed symmetrically and evenly. The snap sleeve is provided with an inner projection which engages in a corresponding axial recess in the drive shaft. This preferably has Inner projection has a circular cross-sectional configuration, this profile engaging in a corresponding longitudinal recess in the drive shaft.
Die Schnecke umfaßt vorzugsweise nur einen Gewindegang. Diese Ausbildung erleichtert das Einsetzen der Vertikalachse mit dem hiermit einstückig ausgebildeten Ritzel. Die Vertikalachse wird mit ihrem Endlagerzapfen zunächst schräg in zwei axial versetzte Halblagerschalen eingesetzt, worauf der zweite Lagerzapfen durch einen seitlichen Druck in die untere, mit einem Axialschlitz versehene zweite Lagerschale eingeklinkt wird. Durch eine leichte Drehung kommt dabei das Ritzel mit dem einzigen Gewindegang der Schnecke zum Eingriff.The worm preferably comprises only one thread. This design facilitates the insertion of the vertical axis with the pinion formed in one piece with it. The vertical axis with its end bearing journal is initially inserted obliquely into two axially offset half bearing shells, whereupon the second bearing journal is latched into the lower second bearing shell provided with an axial slot by lateral pressure. With a slight turn, the pinion engages with the single thread of the worm.
Das Ritzel der Vertikalachse, mit welchem die Schnecke in Eingriff steht, erstreckt sich, gemäß einer Ausführungsform der Erfindung, nur über einen Teilumfang der Vertikalachse und ist beidseitig durch jeweils einen Anschlag begrenzt. Sobald die Schnecke in Anlage mit einem der Anschläge kommt, tritt die Rutschkupplung zwischen Schnapphülse und Schnecke in Funktion, so daß eine weitere Rotation der Antriebswelle ohne Wirkung bleibt.The pinion of the vertical axis, with which the worm is in engagement, extends, according to one embodiment of the invention, only over a partial circumference of the vertical axis and is delimited on both sides by a stop. As soon as the worm comes into contact with one of the stops, the slip clutch between the snap sleeve and the worm comes into operation, so that a further rotation of the drive shaft has no effect.
Weitere Vorteile, Einzelheiten und erfindungswesentliche Merkmale ergeben sich aus der nachfolgenden Beschreibung einer bevorzugten Ausführungsform des erfindungsgemäßen Schneckenantriebes unter Bezugnahme auf die beigefügten Zeichnungen. Dabei zeigt im einzelnen:
- Fig. 1 eine perspektivische Darstellung eines mit dem erfindungsgemäßen Schneckenantrieb behafteten Lamellenträgergehäuses mit Vertikalachse und angehängter Lamelle schräg von hinten,
- Fig. 2 die perspektivische Darstellung des Lamellenträgergehäuses schräg von vorn, unter Explosionsdarstellung des Antriebes,
- Fig. 3 eine der Fig. 2 entsprechend Darstellung mit montiertem Schneckenantrieb,
- Fig. 4 die Vorderansicht einer Schnapphülse,
- Fig. 5 einen Axialschnitt durch eine Schnapphülse,
- Fig. 6 einen Axialschnitt durch eine Schnecke und
- Fig. 7 den in dem Gehäuse montierten Schneckenantrieb im Schnitt.
- 1 is a perspective view of a slat carrier housing afflicted with the worm drive according to the invention with vertical axis and attached slat obliquely from behind,
- Fig. 2 is a perspective view of the disk carrier housing diagonally from the front, with the drive exploded,
- 3 is one of FIG. 2 corresponding representation with mounted worm drive,
- 4 shows the front view of a snap sleeve,
- 5 shows an axial section through a snap sleeve,
- Fig. 6 is an axial section through a screw and
- Fig. 7 the worm drive mounted in the housing in section.
Zum allgemeinen Verständnis soll zunächst Aufbau und Wirkungsweise der Vertikallamellenjalousie kurz anhand der Darstellung in Fig. 1 erläutert werden. Das Lamellenträgergehäuse 10 steht über Gleitführung 11, 12, 13 und 14 mit dem Innenprofil einer hier nicht wiedergegebenen Tragschiene in Anlage und wird über einen manuellen oder motorischen Antrieb entlang der Tragschiene verfahren. In dem Gehäuse 10 ist drehbar eine Vertikalachse 15 gelagert, die an ihrem unteren Ende eine Lamellenhalterung oder einen Haken 16 trägt, zur Aufnahme eines an der Lamelle 17 gehaltenen Bügels 18.For general understanding, the structure and mode of operation of the vertical louvre blind will first be briefly explained using the illustration in FIG. 1. The
Die Vertikalachse 15 umfaßt ein materialeinheitlich hiermit ausgebildetes Ritzel 19, das sich jedoch nur über den halben Umfang der Vertikalachse 15 erstreckt, da die Lamelle 17 selbst um nicht weiter als einen Winkel von 180° geschwenkt werden soll. Am Umfang der Vertikalachse 15 ist das Ritzel durch mindestens einen Anschlag 20 begrenzt.The
Die Einstellung der Winkelposition der Vertikalachse 15 und damit der Lamelle 17 erfolgt über einen Schneckenantrieb, der nachfolgend unter Bezugnahme auf die Fig. 2 bis 7 näher erläutert werden soll.The setting of the angular position of the
Wie die Fig. 2 zeigt, ragt von der Rückwandung 21 des Lamellenträgergehäuses 10,das keine vordere Abschlußwand besitzt, ein rohrstutzenförmiger Vorsprung 22 nach vorn in das Innere des Gehäuses 10, der die Nabe für die Schnecke 23 bildet. Die Schnecke 23 umfaßt lediglich einen einzigen Gewindegang 24. Der Durchmesser der Nabe 22 ist nur wenig kleiner als der Innendurchmesser der Schnecke 23, so daß diese sich hierauf leicht zu drehen vermag.2 shows, protrudes from the
Die Schnecke 23 wird mittels einer Schnapphülse 25 auf der Nabe 22 des Gehäuses 10 gehalten. Radial federnde Haken 26 durchgreifen die Axialausnehmung der Nabe 22 und federn radial nach außen in eine umlaufende Aussparung 37 auf der Rückseite der Rückwandung 21 des Gehäuses 10, wie aus Fig. 1 deutlich wird.The
Die Fig. 3 zeigt den Schneckenantrieb in montiertem Zustand, wobei die Schnecke 23 von der Schnapphülse 25 fest, jedoch drehbar, auf der Nabe gehalten ist.3 shows the worm drive in the assembled state, the
Die Vertikalachse 15 wird schräg in zwei axial versetzte Lagerhalbschalen 27 des Gehäuses 10 eingesetzt, worauf, wie in Fig. 3 durch Pfeile angedeutet, durch einen seitlichen Druck der untere Lagerzapfen 28 in die mit einem Axialschlitz versehene untere Lagerschale 29 eingeklinkt wird. Dabei kommt das Ritzel 19 mit dem Schneckengang 24 der Schnecke 23 zum Eingriff.The
Aus der in Fig. 4 wiedergegebenen Vorderansicht der Schnapphülse 25 ergibt sich, daß diese auf dem äußeren Umfang des Bundes zwei Nocken 30 trägt, die mit der Innenzahnung 31 der in Fig. 6 im Schnitt dargestellten Schnecke 23 in Eingriff stehen. Die Schnapphülse 25 ist in einem Abstand vom äußeren Umfang mit zwei ein-ander gegenüberliegenden, kreisbogenförmigen Ausnehmungen 32 versehen, wodurch Federbügel 33 gebildet werden, die die Nocken 30 tragen. Die Nocken 30 stehen somit in federndem Eingriff mit der Innenzahnung 31 der Schnecke 23, so daß nur ein vorbestimmtes Drehmoment übertragen wird.The front view of the
Die Schnapphülse 25 ist außerdem auf ihrer Innenseite mit einem kreisausschnittförmigen Vorsprung 34 versehen, zum formschlüssigen Eingriff mit der in den Zeichnungen nicht wiedergegebenen Antriebswelle, die mit einer entsprechenden Längsaussparung versehen ist.The
Aus Fig. 5 wird deutlich, daß die Schnapphülse 25, ausgehend von ihrem Bund, mit sich in Axialrichtung erstreckenden Haken 26 versehen ist. Die Haken 26 besitzen eine nach außen zum Bund hin geneigte Abschlußfläche 35, die das Einschieben der Schnapphülse 25 in die Nabe 22 erleichtert, wobei die Haken 26 radial nach innen geführt werden.5 that the
Die Schnecke 23 trägt angrenzend an die Innenzahnung 31 einen Ringflansch 36, an welchen sich die Schnapphülse 25 anlegt, wenn sie die Schnecke 23 und die Nabe 22 durchgreift.The
Die Fig. 7 zeigt einen Schnitt durch das Gehäuse 10 mit montiertem Schneckenantrieb. Die Schnecke 23 ist auf die Nabe 22 aufgesetzt, und die Schnapphülse 25 greift mit ihren Haken 26 in die ringförmige Ausnehmung 37 auf der Rückseite der Rückwandung 21 des Gehäuses 10 ein.7 shows a section through the
Es ist an dieser Stelle noch einmal hervorzuheben, daß es sich bei der vorangehenden Beschreibung lediglich um eine solche beispielhaften Charakters handelt und daß verschiedene Abänderungen udn Modifikationen möglich sind, ohne dabei den Rahmen der Erfindung gemäß den Ausprüchen zu verlassen. So ist es im besonderen möglich, der Schnapphülse 25 eine andere Außenprofilierung zu geben, die mit der Innenzahnung 31 der Schnecke in Eingriff steht, ohne die Funktion hierdurch wesentlich zu beeinflussen. Auch kann die Schnapphülse 25 etwa mit einer Vielzahl von radial federnden Haken versehen sein.At this point it should be emphasized once again that the foregoing description is merely of such an exemplary character and that various changes and modifications are possible without departing from the scope of the invention according to the claims. It is thus possible in particular to give the snap sleeve 25 a different external profile which is in engagement with the
Claims (13)
- Worm drive for adjusting the angular position of vertical lamellar blinds with a vertical shaft, which is arranged inside a lamella carrier housing, bears a pinion, which is non-rotatably connected to the shaft, and is connected at one end to a lamella, a worm, which can be rotated by a drive shaft via an internal profile, being in driving mesh with the pinion, characterised in that the worm (23) comprises an axial central hole and is held on a socket-shaped projection (22) of the lamella carrier housing (10) by means of a snap sleeve (25).
- Worm drive according to claim 1, characterised in that the worm (23) bears a circulating internal tooth system (31), which is in mesh with an external profile (30) of the snap sleeve (25).
- Worm drive according to claim 2, characterised in that the internal tooth system (31) of the worm (23) is arranged in a circulating recess, and the external profile of the snap sleeve (25) is formed by dogs (30) which point outwards from its collar.
- Worm drive according to claim 3, characterised in that the dogs (30) are each held at a spring clip (33).
- Worm drive according to claim 4, characterised in that the spring clips (33) consist of a circumferential part of the snap sleeve (25) which is cut free.
- Worm drive according to one of the preceding claims, characterised in that the snap sleeve (25) bears hooks (26) which are held in the axial direction, are resilient in the radial direction and engage behing the rear wall (21) of the lamella carrier housing (10).
- Worm drive according to claim 6, characterised in that the hooks (26) of the snap sleeve (25) engage in a circulating recess (37) in the back of the rear wall (21) of the lamella carrier housing (10).
- Worm drive according to claim 6 or 7, characterised in that the end faces (35) of the hooks (26) are inclined outwards towards the collar of the snap sleeve (25).
- Worm drive according to one of claims 6 to 8, characterised in that four hooks (26) are held at the snap sleeve (25) such that they are in each case staggered by 90°.
- Worm drive according to one of the preceding claims, characterised in that the snap sleeve (25) comprises an internal projection (34).
- Worm drive according to claim 10, characterised in that the cross section of the internal projection (34) is essentially in the form of the sector of a circle.
- Worm drive according to one of the preceding claims, characterised in that the worm (23) only comprises one turn (24).
- Worm drive according to one of the preceding claims, characterised in that the pinion (19) of the vertical shaft (15) with which the worm (23) is in mesh only extends over part of the circumference of the vertica shaft (15) and is bounded on both sides by a respective stop (20).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3825978A DE3825978A1 (en) | 1988-07-29 | 1988-07-29 | SCREW DRIVE FOR ADJUSTING THE ANGLE POSITION OF VERTICAL BLADE BLINDS |
| DE3825978 | 1988-07-29 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0352410A2 EP0352410A2 (en) | 1990-01-31 |
| EP0352410A3 EP0352410A3 (en) | 1991-07-24 |
| EP0352410B1 true EP0352410B1 (en) | 1993-02-17 |
Family
ID=6359933
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP89107580A Expired - Lifetime EP0352410B1 (en) | 1988-07-29 | 1989-04-26 | Worm gear for angle adjustment of vertical lamellar blinds |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US5067544A (en) |
| EP (1) | EP0352410B1 (en) |
| CA (1) | CA1316096C (en) |
| DE (1) | DE3825978A1 (en) |
| ES (1) | ES2039739T3 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5445205A (en) * | 1993-10-08 | 1995-08-29 | Hansen; Don | Vertical blind assembly |
| US5577542A (en) * | 1994-09-28 | 1996-11-26 | Hung; Tien-Szu | Slat carrier for vertical venetian blind |
| US5950701A (en) * | 1997-06-30 | 1999-09-14 | Exactocraft (Proprietary) Limited | Drive gear unit for vertical blind systems |
| US6866078B1 (en) * | 2003-12-03 | 2005-03-15 | Ya-Yin Lin | Sliding carriage for vertical blind |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4316493B1 (en) * | 1977-08-15 | 1997-06-24 | Newell Operating Co | Vertical blind controls |
| DE2807440C2 (en) * | 1978-02-22 | 1985-06-13 | Hunter Douglas Industries B.V., Rotterdam | Vertical louvre blind with a carriage that can be moved in a top rail |
| US4350197A (en) * | 1978-08-03 | 1982-09-21 | Berthold Haller | Shutter blind assembly |
| DE2913885C2 (en) * | 1979-04-06 | 1984-04-12 | Hunter Douglas Industries B.V., 3008 Rotterdam | Louvre blind with vertically arranged slats |
| EP0120567B1 (en) * | 1983-03-24 | 1986-11-05 | Hunter Douglas Industries B.V. | A clutch for a vertical louvre blind |
| GB2145141A (en) * | 1983-08-16 | 1985-03-20 | Hunter Douglas Ind Bv | Clutch for a vertical louvre blind |
| US4628981A (en) * | 1985-04-08 | 1986-12-16 | Micro Molds Corporation | Vertical blind assembly |
| AU556227B3 (en) * | 1986-07-14 | 1986-11-13 | Kresta Blinds Ltd. | Vertical blind carrier |
| US4736784A (en) * | 1987-02-09 | 1988-04-12 | Boloix Jose A | Vertical blind mechanism |
| US4799527A (en) * | 1987-04-30 | 1989-01-24 | American Vertical Systems | Vertical blind assembly |
| DE3825959A1 (en) * | 1988-07-29 | 1990-02-08 | Stoever Adolf Bautex Kg | Slat carrier for a vertically slatted blind |
-
1988
- 1988-07-29 DE DE3825978A patent/DE3825978A1/en not_active Withdrawn
-
1989
- 1989-04-26 ES ES198989107580T patent/ES2039739T3/en not_active Expired - Lifetime
- 1989-04-26 EP EP89107580A patent/EP0352410B1/en not_active Expired - Lifetime
- 1989-07-13 CA CA000605720A patent/CA1316096C/en not_active Expired - Fee Related
- 1989-07-28 US US07/387,167 patent/US5067544A/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| EP0352410A3 (en) | 1991-07-24 |
| CA1316096C (en) | 1993-04-13 |
| DE3825978A1 (en) | 1990-02-01 |
| ES2039739T3 (en) | 1993-10-01 |
| EP0352410A2 (en) | 1990-01-31 |
| US5067544A (en) | 1991-11-26 |
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