EP1375812B1 - Drive for a louvre arrangement - Google Patents

Abstract

The drive system for a lamella arrangement (1) has a motor-driven drive shaft (8) in a stationary accommodation in which gears (9) are located, each with a bearing pin. In the accommodation at least one shaft (5) of a lamella (2) is located, operable by means of a worm wheel, face wheel or gear train via the drive shaft for position adjustment of the lamellas. The accommodation is formed by a profile tube (3), in the longitudinal direction of which runs the drive shaft. The longitudinal axis of the bearing pin runs crossways to the longitudinal direction of the profile tube and its long side ends are fitted in opposing side walls of the profile tube. The gears are identical and integrated in a housing.

Description

The invention relates to a drive system for a lamellar arrangement according to the preamble of claim 1.

Such lamellar arrangements have multiple arrangements of lamellae, in particular large lamellae, and are typically installed on building facades as shading systems. The slats each have a lamella wing and a shaft. By means of suitable drive systems, the waves are rotated, whereby the positions of the lamella wings can be changed in a predetermined manner.

In principle, the drive systems can be designed such that the shafts are driven by separate motors. However, this leads to an undesirably high cost. In addition, there is a considerable effort to control the individual motors in order to obtain a synchronous movement of the individual lamellar wings.

In principle, such drive systems may also have mechanical arrangements such as rack and pinion systems. As a result, although the number of required drives can be reduced. However, this is disadvantageous in that they are sensitive to mechanical stresses.

In this case, a significant problem is that such slats, in particular large slats have a large weight. Due to the large masses to be moved occur in the adjustment of the slats large forces, which are transmitted to a part of the rack systems, whereby these are impaired in their function.

Further functional impairments result from temperature effects. Since the lamellar arrangements are arranged on the outer sides of buildings, weather-related significant temperature fluctuations occur there. Since the mechanical components have different temperature-dependent expansion coefficients within the overall system, depending on the nature of the material and the arrangement, there is a risk that mechanical components will tilt and block when temperature fluctuations occur, as a result of which the adjustment of lamellae will be impaired.

A generic drive system is known from US-A-5,467,556. The drive system drives a sipe system for closing a squeegee having an aluminum frame. To adjust the slats operable transmissions are provided via a drive linkage, wherein each gear has a bearing journal, which is housed in a transmission housing. The individual gearboxes are mounted in a frame profile which is open on its front side. Over the entire length of the frame profile, the journals are guided to connect the slats.

DE 90 17 185 U relates to an adjustable blind with an array of slats. The lamellae each have a shaft segment at their longitudinal ends. The wave segments of the slats at one end lie in a U-profile. At the other end, the shaft segments are each coupled to a gear, wherein each gear has a movable via a drive rod worm wheel. The individual gears are bolted to the back of another U-profile. At the front sides of the discharge nozzles are provided in the respective gears, in which the shaft segments can be inserted.

The invention has for its object to provide a drive system for a fin assembly, which is easy and inexpensive to install, and with which a safe, accurate and störunanfällige adjustment of the fins is feasible.

To solve this problem, the features of claim 1 are provided. Advantageous embodiments and expedient developments of the invention are described in the subclaims.

The drive system according to the invention for a lamellar arrangement comprises a motor-driven, running in a stationary recording drive linkage and disposed in the receptacle gear, each gear has a bearing journal, in which at least one shaft of a blade can be stored. The journal is by means of a worm wheel, spur gear or gear train, which or which can be actuated via the drive linkage, is rotatable for adjusting the position of the blade. The receptacle is formed by a profile tube, in the longitudinal direction of the drive rod extends. The longitudinal axis of the bearing pin extends transversely to the longitudinal direction of the profile tube, wherein its longitudinal ends are mounted in opposite side walls of the profile tube.

The drive linkage is preferably driven by means of an electric drive. By means of the thus driven drive linkage and the gear coupled thereto a plurality of slats can be synchronously changed in their position.

The drive system designed in this way has an extremely cost-effective, modular design.

The drive linkage and the gears are integrated to save space in the profile tube.

An essential advantage of the drive system according to the invention consists in the fact that the bearing journals of the individual gears which receive the shafts of the lamellae are mounted in the profile tube.

This ensures that all forces exerted by the blades forces are absorbed by the profile tube and thus do not act on the transmission. As a result, the gearboxes are effectively protected against damage.

Another advantage of this arrangement is that the bearing in this profile tube drive linkage is decoupled from the slats by the storage of the bearing pin in the profile tube. Thus, caused by temperature fluctuations length changes of the drive linkage do not affect the movements of the slats. Thus, an exact uniform and synchronous running of the slats is obtained even with existing temperature fluctuations. Finally, the drive system according to the invention is insensitive to temperature-induced changes in length of the profile tube.

The individual gears of the drive system are preferably identical in design and mounted in likewise identically designed housings.

The worm wheel of a gearbox is in engagement with a worm. The worm itself is likewise arranged in the housing and is set into rotary motion by means of the drive linkage.

The so-trained transmission can be mounted on freely selectable positions of the recording, in particular of the profile tube. Particularly advantageously, the gear with the housings are designed such that they can be mounted on one side of the profile tube, whereby a particularly simple and quick installation is guaranteed.

In a particularly advantageous embodiment, the worms of the gear are formed in several pieces and can thereby be decoupled from the drive linkage, whereby a single adjustment of lamellae is made possible.

In a further advantageous embodiment, means for generating a predetermined contact pressure between the worm and the worm wheel are provided in the individual transmissions.

As a result, a play-free guidance of the worm is achieved on the worm wheel, whereby unwanted rattling of the fins in strong winds or the like is prevented.

In a particularly advantageous embodiment of the invention, the drive system has a so-called torque shutdown. This torque shutdown is used in particular for personal protection such that in a manual intervention in the slats are excluded by a person injuries.

The torque shutdown is designed as a mechanical control system. In this case, when a limit value of the torque load on a lamella wing is exceeded, the corresponding lamella is decoupled from the drive system, in particular from the associated transmission, so that the lamella is preferably stationary.

In an advantageous development is achieved by a suitable mechanical system that during a reference movement of the drive system, the blade is automatically coupled to the transmission again.

The so-formed torque shutdown requires no effort and thus does not limit the availability of the drive system with high reliability.

Figur 1:

Perspektivische Darstellung einer Lamellenanordnung mit einem Antriebssystem zur Positionsverstellung der Lamellen.

Figur 2:

Querschnitt durch ein in einem Profilrohr gelagertes Getriebe des Antriebssystems gemäß Figur 1.

Figur 3:

Perspektivische Darstellung der Einzelkomponenten des Getriebes gemäß Figur 2.

Figur 4:

Perspektivische Darstellung eines geöffneten Gehäuses eines Getriebes gemäß Figur 2 mit darin montierten Einzelkomponenten.

Figur 5:

Querschnitt durch eine weitere Ausführungsform eines Getriebes für das Antriebssystem gemäß Figur 1.

Figur 6:

Perspektivische Darstellung der Einzelkomponenten einer Schnecke mit Antriebsgestänge für ein Getriebe des Antriebssystems gemäß Figur 1.

Figur 1 zeigt eine Lamellenanordnung 1 mit einer vorgegebenen Anzahl von Lamellen 2, insbesondere Großlamellen. Die Lamellenanordnung 1 wird typischerweise an einer nicht dargestellten Außenfassade eines Gebäudes montiert und dient als Sonnenschutzsystem.The invention will be explained below with reference to the drawings. Show it:

FIG. 1:

Perspective view of a slat arrangement with a drive system for positional adjustment of the slats.

FIG. 2:

Cross section through a mounted in a profile tube gear of the drive system of Figure 1.

FIG. 3:

Perspective view of the individual components of the transmission according to FIG. 2.

FIG. 4:

Perspective view of an open housing of a transmission according to FIG. 2 with individual components mounted therein.

FIG. 5:

Cross section through a further embodiment of a transmission for the drive system according to Figure 1.

FIG. 6:

Perspective view of the individual components of a screw with drive linkage for a transmission of the drive system according to FIG. 1

FIG. 1 shows a lamellar arrangement 1 with a predetermined number of lamellae 2, in particular large lamellae. The lamellae assembly 1 is typically mounted on an exterior facade, not shown, of a building and serves as a sunshade system.

The arrangement according to Figure 1 has six blades 2, wherein in each case three blades 2 are arranged one above the other. These fins 2 are mounted between stationary receptacles forming profile tubes 3. The lamellae 2 each consist of a lamella wing 4 and a shaft 5. The longitudinal ends of the lamella 2 are each mounted in a profile tube 3. In the central profile tube 3, a drive system 6 is integrated, by means of which the inclinations of the lamella wings 4 can be adjusted synchronously.

The invention is not limited to the arrangement according to FIG. Rather, application-specific, the number of lamellae 2 and the profile tubes 3 can be varied.

The drive system 6 according to FIG. 1 has an electric drive 7 with which a drive linkage 8 can be set into a rotational movement about its longitudinal axis. The drive linkage 8 consists of a rod with a constant, rotationally asymmetric cross section. In the present case, the drive linkage 8 is designed as a square rod.

The drive linkage 8 extends in the interior of the central profile tube 3 in its longitudinal direction. There, the drive linkage 8 is guided on three identically designed gear 9. The rotational movement of the drive linkage 8 is transmitted via the gear 9 to the adjoining on both sides of the transmission 9 shafts 5 of the slats 2, whereby the inclinations of the slat blades 4 are adjusted.

The structure of a transmission 9 according to Figure 1 is shown in detail in Figures 2 to 4. The transmission 9 is integrated in a housing 10, which has a substantially cuboid outer contour. The housing 10 consists of two half-shells 10a, 10b, which can be inserted one on top of another, and which are preferably made of injection-molded plastic parts. To transmit the rotational movement of the drive linkage 8 on the shafts 5 of the slats 2, a screw 11 is provided, which is in engagement with a worm wheel 12. The worm wheel 12 in turn is mounted on a bearing journal 13, in which the shafts 5 of the lamellae 2 are guided.

The longitudinal axis of the bearing pin 13 extends transversely to the longitudinal direction of the profile tube 3. The longitudinal ends of the bearing pin 13 protrude beyond the housing 10 of the transmission 9 and are mounted in opposite side walls of the profile tube 3. Furthermore, a torque arm in the form of a pin 14 is provided for fixing the gear 9 in the profile tube 3. The longitudinal axis of the pin 14 extends parallel to the longitudinal axis of the bearing pin 13. The over the housing 10 a, 10 b protruding longitudinal ends of the pin 14 are mounted in the profile tube 3. The pins 14 give the profile tube 3 an additional rigidity.

For mounting the gear 9 3 corresponding holes are incorporated into the profile tube. In particular, the holes for receiving the journal 13 have different diameters. Thus, these holes can be incorporated from one side of the profile tube 3. The introduction of the housing 10 then takes place via the open rear side of the profile tube 3. The assembly of the transmission 9 can be done at any altitude of the profile tube 3. Thus, the distances of the gear 9 to each other can be varied as needed. In the present example, the gear 9 are arranged equidistantly.

As can be seen in particular from FIG. 3, the bearing journal 13 has a central section 13a, at each of whose longitudinal ends a rotationally symmetrical end section 13b, 13c adjoins.

Each end piece is located in a bearing 15a, 15b in a bore of the profile tube 3. The end pieces 13b, 13c have according to the radii of the holes on different outer diameter. The end piece 13b with the larger outer diameter and the associated bearing 15a on the machining side of the profile tube 3 are secured with a locking ring 16.

Thus, the bearing in the profile tube 3 bearing pin 13 is rotatably mounted in the profile tube 3. The bearing pin 13 is penetrated by a bore with a rotationally asymmetric, in particular square cross-section. In this hole, the ends of the shafts 5 are each a blade 2 is inserted from both sides, these ends are positively guided in the bore. By the rotation of the bearing pin 13 about its longitudinal axis so that the waves 5 of the slats 2 are rotated.

The lateral surface of the central portion 13b is rotationally asymmetrical. In the present case, the central portion is formed as a square profile piece.

The worm wheel 12 of the transmission 9 is traversed in the longitudinal direction by a central bore whose cross section is adapted to the outer contour of the central portion 13b. The length of the central portion 13b corresponds to the length of the worm wheel 12. The outer diameter of the smaller end portion 13c of the bearing pin 13 is smaller than the outer diameter of the portion, so that the worm wheel 12 can be plugged from this side onto the bearing pin 13 until the entire central portion 13b is guided positively in the bore of the worm wheel 12.

The worm wheel 12 has at its longitudinal ends cylindrical segments 12a, 12b, which lie in correspondingly formed recesses in the side walls of the housing 10. In this case, washers 12 are applied to these segments 12a, 12b. The longitudinal ends of the thus mounted in the housing 10 worm wheel 12 and the central portion 13b of the bearing pin 13 are flush with the corresponding outer sides of the housing wall.

The bearing pin 13 is rotated by turning the worm wheel 12. The worm wheel 12 in turn is placed on the worm 11 in a rotary motion. With the worm wheel 12 of the bearing pin 13 and thus guided in its bore shafts 5 of the slats 2 are rotated.

The longitudinal axis of the worm 11 extends perpendicular to the longitudinal axis of the worm wheel 12. The worm 11 itself is traversed in the longitudinal direction of a bore with rotationally asymmetric cross section.

The cross section of the bore is adapted to the cross section of the drive linkage 8, so that it is positively guided in the bore. As a result, the screw 11 is rotated during rotation of the drive linkage 8. By the engagement of the worm 11 in the worm wheel 12, this is also set in a rotational movement.

The longitudinal ends of the screw 11 form cylindrical bearing segments 11 a, 11 b, which are rotatably mounted in corresponding receptacles in opposite walls of the housing 10. The end faces of the cylindrical bearing segments 11a, 11b of the screw 11 are flush with the corresponding outer sides of the housing 10. The cylindrical bearing segments 11 a, 11 b have a smaller outer diameter than the central part of the screw 11. Before insertion into the receptacles of the housing 10a, 10b As can be seen from FIGS. 2 to 4, the housing 10 has a formation 19 in which the worm 11 is guided. The formation 19 is designed so that the central part of the screw 11 rests tightly against the formation 19. With the formation 19 a secure guidance of the screw 11 is achieved in the execution of the rotational movement.

FIG. 5 shows a modification of the transmission 9 according to FIGS. 2-4. The transmission 9 according to FIG. 5 is almost identical to the embodiment according to FIGS. 2-4.

In contrast to the embodiment shown in Figures 2-4, the formation 19 for guiding the worm 11 is formed such that between the walls of the formation 19 and the worm 11 small gaps remain. Thus, the worm 11 is movable relative to the worm wheel 12 to a small extent transversely to its longitudinal axis. On the opposite side of the worm wheel 12 of the formation 19, a leaf spring 20 is arranged as a spring element, which presses the worm 11 with a predetermined contact pressure against the worm wheel 12. In this way, a backlash-free running of the worm 11 is obtained on the worm wheel 12. To accommodate the movement of the worm 11 relative to the worm wheel 12, the torque arm is mounted in this case in Langlöchem the walls of the profile tube 3.

In general, other spring elements or damping elements can be used to produce a predetermined contact pressure between the worm 11 and worm wheel 12.

The individual gear 9 of the drive system 6 are coupled in an identical manner to the drive linkage 8. Thus, the individual slats 2 are moved synchronously in pairs via the individual gear 9.

However, misalignments of the fins 2 may occur during installation of the overall system. As a result, the lamella wings 4 can be in slightly different angular positions, which is undesirable. Since the slats 2 are moved synchronously via the drive system 6, this offset of the slats 2 is maintained.

In order to be able to carry out an exact alignment of the lamella wings 4 during the commissioning of the entire system, in an advantageous embodiment, a mechanical decoupling of the individual screws 11 from the drive linkage 8 is provided as shown in FIG.

The worm 11 is formed in several parts in this case and consists of a main body 21 with a helical shell surface and an attachment 22, which can be fixed with a clip 23 or the like lösbau on the base body 21. In the present case, the attachment 22 has a base 24 with a square cross-section, which can be inserted into a corresponding recess on the upper side of the main body 21.

The drive linkage 8 is again formed in the present case by a square rod. The attachment 22 is traversed in the longitudinal direction of a bore in which the drive linkage 8 is guided positively. In contrast, the main body 21 of the screw 11 is penetrated by a bore with a larger diameter, so that the drive linkage 8 is rotatably mounted in this bore.

During operation of the lamellar assembly 1, the attachment 22 is fixed on the base body 21. Thus, not only the attachment 22 but also the base body 21 is carried along during the rotational movement of the drive linkage 8.

For Einzeljustage of slats 2 of the attachment 22 of the screw 11 from position of the worm wheel 12 and thus be rotated to adjust the slat position. Due to the specific design of the base 24 and the corresponding recess, the base body 21 can be rotated in the present case in 90 ° steps and then fixed again on the attachment 22.

In a further embodiment, not shown, a torque shutdown can be provided on the plate assembly 1. In this case, a lamella 2, on which a torque load that is above a limit value occurs, is mechanically decoupled from the drive system 6, in particular from the transmission 9.

This can be achieved, for example, in that the shaft 5 of a lamella 2 is coupled to the worm wheel 12 via spring-loaded coupling elements. For example, such coupling elements may be formed by spring-loaded cams in the bore of the worm wheel 12, which engage in recesses of the shaft 5. As a result, the shaft 5 is carried along with the worm wheel 12, as long as the torque load occurring at the shaft 5 is below the limit value.

If a torque load lying above the limit value occurs, the cams snap out of the recesses so that the shaft 5 is decoupled from the rotational movement of the worm wheel 12. Thus, the slat 2 is stationary, even if the drive rod 8 is still moving.

To resume routine operation of the fin assembly 1, the shaft 5 of the blade 2 is automatically coupled again in a predetermined desired position to the worm wheel 12, so that then this blade 2 can be adjusted synchronously with the other blades 2 by means of the drive system 6. The target position is chosen such that when coupling the blade 2 to the worm wheel 12, the angular position of the vane blade 4 of this blade 2 with the angular positions of the other blade wing 4th matches. To specify the desired position, suitable disks with angle-dependent structures can be provided in the region of the bearing journal 13, which are rotated against predetermined stops, the stops defining the desired positions.

LIST OF REFERENCE NUMBERS

(1)

fin arrangement

(2)

slats

(3)

section tube

(4)

lamellar wings

(5)

wave

(6)

drive system

(7)

electric drive

(8th)

drive linkage

(9)

transmission

(10a, 10b)

shells

(11)

slug

(11a, 11b)

bearing segments

(12)

worm

(12a, 12b)

segments

(13)

pivot

(13a)

central section

(13b, 13c)

Tails

(14)

pen

(15a, 15b)

camp

(16)

circlip

(17)

washer

(18)

washer

(19)

formation

(20)

leaf spring

(21)

body

(22)

essay

(23)

clasp

(24)

base

Claims (21)

1. Drive system for a slat arrangement (1) with a motor-driven drive linkage (8) extending in a stationary receptacle and with gears (9) arranged in the receptacle, wherein each gear (9) has a bearing pin (13), in which at least one shaft (5) of a slat (2) can be mounted and which is rotatable by means of a worm wheel (12), spur gear or gear train, which is actuable by way of the drive linkage (8), for adjusting the position of the slats (2), wherein the receptacle is formed by a profile tube (3), in the longitudinal direction of which the drive linkage (8) extends, and the longitudinal axis of the bearing pin (13) extends transversely to the longitudinal direction of the profile tube (3), characterised in that the ends of the bearing pin (13) at the longitudinal side are mounted in opposite side walls of the profile tube (3).
2. Drive system according to claim 1, characterised in that the gears (9) are of identical construction and are respectively integrated in a housing (10).
3. Drive system according to claim 2, characterised in that a housing (10) is supported in the side walls of the profile tube (3) by means of a pin (14), the longitudinal axis of which extends parallel to the longitudinal axis of the bearing pin (13).
4. Drive system according to one of claims 2 and 3, characterised in that the worm wheel (12) of a gear (9) is disposed in engagement with a worm (11) which is integrated in the housing (10) and rotatable by means of the drive linkage (8).
5. Drive system according to claim 4, characterised in that the drive linkage (8) has a rotationally asymmetrical cross-section.
6. Drive system according to claim 5, characterised in that the worm (11) of a gear (9) is penetrated by a bore in longitudinal direction, wherein the drive linkage (8) is guided in the bore in shape-locking manner.
7. Drive system according to claim 5, characterised in that the worm (11) is rotatably mounted by its ends, which are at the longitudinal side, in the walls of the housing (10).
8. Drive system according to one of claims 1 to 7, characterised in that the bearing pin (13) has a central part portion (13a) which is mounted in a bore, which penetrates the worm wheel (12), with rotationally asymmetrical cross-section.
9. Drive system according to claim 8, characterised in that the ends, which are at the longitudinal side, of the worm wheel (12) and the central part portion (13a) of the bearing pin (13) are flush with the outer sides of the housing (10).
10. Drive system according to one of claims 8 and 9, characterised in that the bearing pin (13) comprises two rotationally symmetrical end portions (13b, 13c), which adjoin the central part portion (13a) at the longitudinal side and which are rotatably mounted in the walls of the profile tube (3).
11. Drive system according to claim 10, characterised in that bearings (15a, 15b) arranged in bores in the walls of the profile tube (3) are provided for reception of the end portions (13b, 13c) of the bearing pin (13).
12. Drive system according to one of claims 10 and 11, characterised in that the end portions (13b, 13c) of the bearing pin (13) have different external diameters.
13. Drive system according to one of claims 8 to 12, characterised in that the bearing pin (13) is penetrated in longitudinal direction by a bore with a rotationally asymmetrical cross-section, in which at least one shaft (5) of a slat (2) is guided in shape-locking manner.
14. Drive system according to one of claims 3 to 13, characterised in that each gear (9) comprises means for producing a predetermined pressing pressure between the worm (11) and the worm wheel (12).
15. Drive system according to claim 14, characterised in that spring elements and/or damping elements acting on the worm (11) and/or the worm wheel (12) are provided for producing the predetermined pressing pressure.
16. Drive system according to one of claims 1 to 15, characterised in that the drive linkage (8) is formed by a rod which can be set into rotational movements with respect to its longitudinal axis by means of an electric drive (7).
17. Drive system according to claim 16, characterised in that for individual adjustment of slats (2) the worm (11) of a gear (9) can be mechanically decoupled from the drive linkage (8).
18. Drive system according to claim 17, characterised in that the worm (11) comprises a base body (21) with a worm-shaped circumferential surface as well as a projection (22), which is detachably connected with the base body (21) and which is guided on the drive linkage (8) in shape-locking manner.
19. Drive system according to one of claims 1 to 18, characterised in that in the case of a torque loading acting on a slat (2) and exceeding a limit value the shaft (5) of the slat (2) can be automatically mechanically decoupled from the associated gear (9).
20. Drive system according to claim 19, characterised in that the shaft (5) of a slat (2) is coupled by way of spring-loaded coupling elements with the bearing pin (13) of the gear (9), wherein the coupling elements are decoupled from the shaft (5) in the case of torque loading exceeding the limit value.
21. Drive system according to claim 20, characterised in that the coupling elements can be coupled with the shaft (5) by way of the rotational movement of the drive linkage (8).

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