Door or window drive, rod assembly and transmission for a door or window drive

Abstract

The present invention relates to a door or window drive (10) comprising: an output shaft (24, 24'); a linkage lever (18, 18') that can be coupled to the output shaft (24, 24'); a first connecting section (30, 30') that is formed on the linkage lever (18, 18') or that can be connected to the linkage lever (18, 18') in a rotationally fixed manner; a second connecting section (34, 34') that is formed on the output shaft (24, 24') or that can be connected to the output shaft (24, 24') in a rotationally fixed manner; an expandable spreading element (38); and a clamping element (40, 40') that interacts with the spreading element (38) and by means of which the spreading element (38) can be expanded;wherein one of the first or the second connecting section (30, 34') has an outer contour (32) and the other of the first or the second connecting section (30', 34') has an inner contour (28) corresponding to the outer contour (32), wherein the inner contour (28) and the outer contour (32) interlock positively in the assembled state of the door or window drive (10) in order to transmit a torque from the output shaft (24, 24') to the linkage lever (18, 18'), and wherein the spreading element (38) is configured to be inserted into the inner contour (28) and spread open by means of the clamping element (40, 40') in order to clamp with the inner contour (28) and to fasten the linkage lever (18, 18') to the output shaft (24, 24').

Description

[0001] The present invention relates to a door or window drive. Furthermore, the present invention relates to a linkage for such a door or window drive. The present invention also relates to a gearbox for such a door or window drive.

[0002] Door or window drives are used to actively drive a movable door or window sash from its closed position to its open position and / or vice versa, and, if necessary, to hold the door or window sash in its open position.

[0003] The door or window drive according to the invention is not limited to use in a specific type of door or window, but can in principle be used for all types of doors or windows.

[0004] Depending on the design and intended use, such door or window drives can be operated in servo mode or in automatic mode. Door and window drives that can be switched between servo and automatic modes are also known. In servo mode, a torque is generated that enables power-assisted opening of the door or window sash, although manual force application by a person is still required. In contrast, in automatic mode, the door or window sash opens independently, without any manual force being required.

[0005] In such door or window drives, the drive source is typically an electric motor, whose power or torque is transmitted to the door or window sash via a gearbox and a linkage system, which has one or more interconnected linkage levers.

[0006] A purely mechanical door closer, which ensures that a door closes properly without an electric motor, usually by means of a spring, is also to be interpreted as a "door drive" in the sense of the invention. In such door closers, too, the closing force generated by the spring is converted into a torque that is applied to an output shaft and transmitted to the door leaf via a lever linkage.

[0007] The lever linkage is typically attached to the output shaft of the gearbox or, if no gearbox is involved, to the output shaft of the drive motor or door closer. This is conventionally achieved via a positive-locking connection between the output shaft and the linkage, typically secured by a bolted connection. This bolted connection primarily serves to axially secure the connection between the output shaft and the linkage. The bolted connection is usually designed as a counterpiece, which is secured by a bolt.

[0008] If the bolt is not tightened sufficiently, the connection between the output shaft and the linkage can loosen over time. Furthermore, a tensioning expansion bolt must be tightened to a defined torque, which is practically impossible to achieve or at least frequently leads to improper installation.

[0009] Depending on the installation situation, this conventional type of axial securing can lead to further problems due to limited accessibility of the screw connection. In various installation situations, the linkage must also be mounted slightly offset, which is hardly possible with standard fastening systems. At the very least, systems that allow axial offset of the output shaft or the lever linkage are complex and expensive to manufacture.

[0010] Furthermore, the installation of such a door or window drive often requires several components to be plugged together on different mounting sides of the drive on site, which is time-consuming and prone to errors.

[0011] It is therefore an object of the present invention to provide a door or window drive, as well as a linkage and a gearbox for such a door or window drive, which overcome or at least largely solve the aforementioned problems. In particular, it is an object to improve the fastening between the lever linkage and the output shaft of the door or window drive in such a way that it is cheaper to manufacture, more flexible in its application, and quicker to assemble.

[0012] According to a first aspect of the present invention, a door or window drive is provided which has the following features: an output shaft; a linkage lever that can be coupled to the output shaft; a first connecting section that is formed on the linkage lever or that can be connected to the linkage lever in a rotationally fixed manner; a second connecting section that is formed on the output shaft or that can be connected to the output shaft in a rotationally fixed manner; an expandable spreading element; and a clamping element that cooperates with the spreading element and by means of which the spreading element can be expanded; wherein one of the first or the second connecting section has an outer contour and the other of the first or the second connecting section has an inner contour corresponding to the outer contour, wherein the inner contour and the outer contour interlock positively in the assembled state of the door or window drive in order to transmit a torque from the output shaft to the linkage lever, and wherein the spreading element is configured to be inserted into the inner contour and spread open by means of the clamping element in order to clamp with the inner contour and to fasten the linkage lever to the output shaft.

[0013] In the door or window drive according to the invention, the fundamental connection for transmitting the torque from the output shaft to the at least one linkage lever is realized in a conventional manner via the two positively interlocking connecting sections. These two positively interlocking connecting sections can each be designed as separate components that are detachably or materially connected to the output shaft or the linkage lever. Alternatively, the two connecting sections can also be integrally connected to the linkage lever or the output shaft as a single unit.

[0014] One of the two connecting sections has an outer contour that corresponds to an inner contour arranged on the other connecting section and engages with it in a form-fitting manner.

[0015] The final fastening or axial securing of this positive-locking connection between the two connecting sections, i.e., between the output shaft and the linkage lever, is achieved according to the invention by means of an expandable spreading element. This spreading element is inserted into the inner contour in order to clamp against the inner contour in the expanded state and thereby fasten the linkage lever to the output shaft.

[0016] Advantageously, this results in a very simple type of fastening or axial securing, which is made up of few and, in particular, inexpensive components.

[0017] Furthermore, this greatly simplifies the installation of the door or window drive, since to spread the spreading element and thus attach the linkage lever to the output shaft, only the clamping element that interacts with the spreading element needs to be actuated, which is very easy to do from one side of the door or window drive, e.g. from the top.

[0018] Furthermore, the fastening method according to the invention using the expandable spreading element has the advantage that an axial offset of the linkage lever can be achieved very easily. Depending on the installation situation, the linkage lever can be fastened in different axial positions relative to the output shaft using the expandable spreading element, since the spreading element, with the inner contour into which it is inserted, can be clamped in any axial position without any step.

[0019] Another advantage is that the spreading element, together with the clamping element, can be pre-assembled on the connecting section where the outer contour is located. This means that during on-site assembly, only two components—the linkage assembly and the drive's gearbox assembly—need to be inserted into each other and secured using the spreading element, which is opened by the clamping element. Therefore, assembly is extremely simple and quick for the installer.

[0020] The clamping element and the spreading element are preferably connected to the drive assembly, where the outer contour of the positive-locking connection is provided, before the drive assembly is mounted. There are two basic possibilities here. According to a first embodiment, the outer contour is arranged on the first connecting section, which is formed on the linkage lever or is rotationally fixed to it. According to a second embodiment, the outer contour is arranged on the second connecting section, which is formed on the output shaft or is rotationally fixed to it.

[0021] Accordingly, according to a second aspect of the present invention, which relates to the aforementioned first embodiment, a linkage is provided which has the following: a linkage lever that can be coupled to an output shaft of the door or window drive; a first connecting section that is formed on the linkage lever or that can be connected to the linkage lever in a rotationally fixed manner; an expandable spreading element; and a clamping element that interacts with the spreading element; wherein the first connecting section has an outer contour via which a torque can be transmitted from the output shaft to the linkage lever, and wherein the spreading element can be spread by means of the clamping element such that the spreading element, in the spread state, protrudes laterally beyond the outer contour.

[0022] According to a third aspect of the present invention, which relates to the aforementioned second embodiment, a gearbox for the door or window drive is provided, comprising the following: an output shaft that can be coupled to a linkage lever of the door or window drive; a second connecting section that is formed on the output shaft or can be connected to the output shaft in a rotationally fixed manner; an expandable spreading element; and a clamping element cooperating with the spreading element; wherein the second connecting section has an outer contour via which a torque can be transmitted from the output shaft to the linkage lever, and wherein the spreading element can be expanded by means of the clamping element such that the spreading element, in the expanded state, projects laterally beyond the outer contour.

[0023] In other words, if the outer contour is formed on the linkage lever, the linkage is delivered pre-assembled together with the spreading element and the clamping element (first version). In this case, the inner contour is provided on the output shaft.

[0024] In contrast, if the outer contour is formed on the output shaft, the gearbox is delivered pre-assembled together with the spreading element and clamping element located on the output shaft. In this case, the inner contour, into which the outer contour engages, is located on the linkage lever.

[0025] In both cases, the fixing or axial securing is carried out in the manner described according to the invention by spreading the spreading element and clamping it with the inner contour acting as a counterpart.

[0026] According to one embodiment, the connecting section on which the outer contour is arranged has a through-opening through which the clamping element can be passed, as well as an end face surrounding the through-opening against which the spreading element is pulled by means of the clamping element in order to be spread open.

[0027] The spreading element is preferably spread open by being pulled against the end face located on the connecting section with the outer contour, using the clamping element. No further components are therefore necessary to spread the spreading element, making the spreading and fixing process extremely simple.

[0028] Since the clamping element can be passed through the through-opening located in the connecting section with the outer contour, the clamping element together with the spreading element can also be pre-assembled very easily on the corresponding component on which this connecting section with outer contour is located.

[0029] According to a further embodiment, the end face and / or the spreading element has at least one anti-rotation element which prevents the spreading element from rotating relative to the end face by means of force, form and / or frictional engagement.

[0030] This anti-rotation device eliminates the need to counter-hold the spreading element when actuating the clamping element. In other words, only the clamping element needs to be actuated to spread the expanding element and thereby secure the linkage lever to the drive's output shaft. Therefore, during assembly, the drive only needs to be accessible from one side – namely, the side from which the clamping element is actuated.

[0031] The at least one anti-rotation element can be designed in a variety of ways. For example, the anti-rotation feature can be implemented by a projection or a recess on the end face or on the expanding element. Likewise, the end face of the corresponding connecting section and / or the side of the expanding element that interacts with this end face can be roughened, toothed, or knurled to create a frictional or positive locking mechanism.

[0032] According to a further embodiment, the clamping element has a clamping screw with a first thread that engages in a second thread formed on the spreading element. The clamping element is particularly preferably designed as a clamping screw.

[0033] This allows at least the clamping element to be manufactured as a standard component, which understandably results in significant cost advantages. Likewise, this design makes expanding the clamping element extremely simple, as the clamping screw only needs to be screwed into the second threaded hole provided on the clamping element.

[0034] The thread provided on the expanding element can be designed in a variety of ways. It can be on a separate part, such as a sleeve, which is pressed into the expanding element or connected to it by riveting or welding. Alternatively, the second thread can be cut directly into the expanding element itself, i.e., it can be an integral part of the expanding element.

[0035] It should be noted at this point that the term "spreading element" is to be interpreted broadly and functionally according to the invention, so that any expandable component which can be spread using a clamping element in the manner according to the invention and can be clamped with the inner contour of the corresponding fastening section is to be interpreted as a spreading element in the sense of the invention.

[0036] According to a further embodiment, the spreading element extends along a longitudinal axis and is designed to spread out along a radial direction oriented transversely to the longitudinal axis.

[0037] The aforementioned longitudinal axis is preferably an axis of symmetry of the spreading element. The longitudinal axis also preferably coincides with the axis along which the second thread provided on the spreading element extends.

[0038] According to a further embodiment, the outer diameter of the spreading element in its unloaded state is smaller than the inner diameter of its inner contour. Accordingly, the outer diameter of the spreading element in its unloaded state is preferably also smaller than the outer diameter of its outer contour.

[0039] In other words, when unloaded, the expanding element does not protrude laterally beyond the outer contour. The expanding element, along with the connecting section bearing the outer contour, can therefore be easily inserted into the other connecting section bearing the inner contour. Only after the expanding element is extended does it protrude laterally from the outer contour, come into contact with the inner contour, and clamp to it in the manner described.

[0040] According to a further embodiment, the spreading element has a sleeve extending along the longitudinal axis of the spreading element and at least one wing projecting from the sleeve in a transverse direction perpendicular to the longitudinal axis of the spreading element, the orientation of which can be changed relative to the longitudinal axis of the spreading element to spread the spreading element.

[0041] The aforementioned sleeve preferably houses the previously mentioned thread of the expanding element, which is referred to here as the "second thread". The at least one wing projecting from this sleeve is preferably bent over when the expanding element is spread, thereby changing its orientation relative to the longitudinal axis of the expanding element or relative to the sleeve of the expanding element.

[0042] Preferably, the at least one wing is inclined in an unloaded state at an angle of less than 90°, preferably less than 80°, particularly preferably less than 70°, relative to the longitudinal axis of the spreading element.

[0043] This angle is increased when the spreading element is opened, which also increases the diameter of the spreading element in order to, as mentioned, protrude laterally beyond the outer contour in the opened state and clamp to the inner contour.

[0044] According to a further embodiment, the at least one wing has several separate wings that are arranged distributed along a circumference of the sleeve of the spreading element.

[0045] Providing several such distributed wings has the advantage that the spreading element can be deformed more easily for spreading. This reduces the assembly forces.

[0046] The individual wings are preferably separated from each other by slots. To ensure an even distribution of force, the individual wings are preferably of the same shape and size.

[0047] According to a further embodiment, the outer and inner contour of the door or window drive, when mounted, runs along the longitudinal axis of the spreading element and transversely to a longitudinal axis of the linkage lever.

[0048] The outer contour preferably has a toothed or polygonal shape. A hexagonal shape is particularly preferred. Preferably, the outer contour of the expanding element is adapted to the outer contour of the connecting section. In this respect, the expanding element preferably has one or more circumferential outer edges that lie on a circular or polygonal outline.

[0049] The spreading element itself is preferably made at least partially of steel or plastic.

[0050] According to a further embodiment, the inner contour has a step against which the spreading element rests when spread open.

[0051] Such a step creates a particularly secure mechanical hold, making it virtually impossible for the linkage lever to unintentionally detach from the output shaft.

[0052] According to a further embodiment, the inner contour has several parallel recesses spaced apart along a longitudinal axis of the inner contour, into which the spreading element can engage when spread open.

[0053] In other words, the inner contour in this case has several parallel steps. This allows the spreading element, and thus the linkage, to be securely fixed to the output shaft in various axial positions. Depending on the installation and assembly situation, the axial position of the linkage lever relative to the output shaft can therefore be easily varied, while still guaranteeing a mechanically secure fixation in the desired axial position.

[0054] According to a further embodiment, the first connecting section is arranged on an axle extension sleeve which can be attached to a connecting piece firmly connected to the linkage lever, wherein the axle extension sleeve and the connecting piece are held together in the assembled state by the clamping element and the spreading element.

[0055] This design has the advantage that axle extension sleeves of different lengths can be used to vary the axial position. These axle extension sleeves can be manufactured as standard components and then installed according to the desired axial position.

[0056] It is understood that the features mentioned above and those to be explained below can be used not only in the combinations specified, but also in other combinations and individually, without departing from the scope of the present invention. Furthermore, it is understood that the aforementioned embodiments apply not only to the door or window drive according to the first aspect of the invention, but also, in the same or equivalent manner, to the linkage according to the second aspect of the invention and to the gearbox according to the third aspect of the invention.

[0057] Exemplary embodiments of the invention are shown in the drawings and are explained in more detail in the following description. They show: Fig. 1 a perspective view of a door or window drive according to an embodiment of the present invention; Fig. 2 a perspective view of part of a linkage and a gear of the in Fig. 1 The door or window drive shown is in its unmounted state; Fig. 3 is a sectional view of the drive shown in Fig. 3. Fig. 2 shown part of the linkage; Fig. 4 a perspective view from below of a first connecting section of the linkage without a spreader element mounted on it; Fig. 5 a perspective view from below ( Fig. 5a ) as well as a top view from below ( Fig. 5b ) on the in Fig. 4 first connecting section shown with spreading element mounted on it; Fig. 6 a perspective view from below ( Fig. 6a ) as well as a top view from below ( Fig. 6b ) on a first connecting section with a spreading element mounted thereon according to a second embodiment; Fig. 7 Sectional views of the interconnected connecting sections of the door or window drive according to the first embodiment with spreading element in unloaded state ( Fig. 7a ) and spreading element in spread state ( Fig. 7b ); Fig. 8 a sectional view detail of the interlocking connecting sections of the door or window drive according to a further embodiment with spreading element in the spread-open state; Fig. 9 a sectional view detail of the interlocking connecting sections of the door or window drive according to yet another embodiment with spreading element in the spread-open state; Fig. 10 sectional views of the interlocking connecting sections of the door or window drive according to a further embodiment in a first assembly variant ( Fig. 10a ) and a second assembly variant ( Fig. 10b ); Fig. 11 a sectional view of the interlocking assembly sections of the door or window drive according to yet another embodiment; Fig. 12 sectional views of the spreading element used in the door or window drive according to a first embodiment ( Fig. 12a ), a second embodiment ( Fig. 12b ) and a third embodiment ( Fig. 12c ); Fig. 13 a perspective view of part of a linkage and a gearbox of a further embodiment of the door or window drive in an unassembled state; and Fig. 14 a sectional view of the in Fig. 13 door or window drive shown.

[0058] Fig. 1 Figure 1 shows a perspective view of a door or window drive according to an embodiment of the present invention. The door or window drive is identified in its entirety by the reference numeral 10.

[0059] The door or window drive 10 has an electric motor 12. The electric motor 12 is connected via a gearbox 14, which is partially in Fig. 2 shown, coupled with a linkage 16, of which in Fig. 1 In particular, a linkage lever 18 is visible. The gearbox 14 is housed in a gearbox casing 20, at one end of which the electric motor 12 is arranged.

[0060] The transmission 14 typically includes several gears, of which only one gear 22 is explicitly mentioned here. Fig. 2 shown, which is arranged on the output shaft 24 designed as a camshaft and rotates synchronously with it.

[0061] The output shaft 24 is according to the in Fig. 2 The illustrated embodiment is designed as a hollow shaft. On its upper side, in Fig. 2 A bearing 26 is shown, by means of which the output shaft 24 is rotatably mounted inside the gearbox housing 20.

[0062] Inside, the output shaft 24 has an inner contour 28, which according to the in Fig. 2 The illustrated embodiment is designed as a toothed gear, more precisely as an internal toothed gear.

[0063] The linkage 16 is coupled to the output shaft 24 via a positive-locking connection. For this purpose, a connecting section 30 is provided at the lower end of the linkage lever 18, which has an outer contour 32 corresponding to the inner contour 28, which is located in the Fig. 2 The illustrated embodiment is designed as a toothed connection, more precisely as an external toothed connection. This connecting section 30, arranged on the linkage 16, is referred to here as the first connecting section 30. The corresponding connecting section 34 provided on the gearbox 14, on which the inner contour 28 is formed, is referred to here as the second connecting section 34.

[0064] The two corresponding connecting sections 30, 34 interlock positively in the assembled state of the drive 10 in order to transmit the drive torque generated by the electric motor 12 via the gearbox 14 to the linkage 16 and to ensure that the linkage lever 18 rotates with the output shaft 24.

[0065] The external toothing provided on the first connecting section 30, which forms the outer contour 32 of the first connecting section 30, is designed as a plug-in toothing that can be inserted into the internal toothing provided on the second connecting section 34 during assembly. According to the embodiment shown here, the first connecting section 30 is designed as a separate connecting component that is fixedly mounted to the linkage lever 18. As in Fig. 3 As indicated, this connecting component, which forms the first connecting section 30, can be materially connected to the linkage lever 18. Fig. 3 For example, a weld point is schematically indicated at point 36. However, the first connecting section 30 can also be integral, i.e., formed as a single piece with the linkage lever 18. Likewise, a detachable connection, e.g., a screw connection between the linkage lever 18 and the first connecting section 30, is conceivable.

[0066] A spreading element 38 is also arranged on the linkage 16, which can be spread open by means of a clamping element 40, designed here as a conventional clamping screw. The clamping element or clamping screw 40 is guided through a through-opening 42 inside the first connecting section 30. More precisely, the clamping element or clamping screw 40 is guided from above through a through-opening 44 in the linkage lever 18, which is aligned with the through-opening 42 in the first connecting section 30.

[0067] The expanding element 38 is screwed onto the lower end of the clamping element 40 in such a way that it touches the first connecting section 30 from below. More precisely, the expanding element 38 abuts a lower end face 46 of the first connecting section 30.

[0068] The clamping element 40, designed as a clamping screw, has a first external thread 48 which engages in a corresponding internal thread 50 located on the expanding element 38. The external thread 48 is referred to here as the first thread, and the internal thread 50 is referred to here as the second thread.

[0069] During assembly, as already mentioned, the linkage 16 is first inserted into the output shaft 24 in such a way that the two connecting sections 30, 34 interlock positively. The spreading element 38 is already pre-assembled on the linkage 16, as shown in Fig. 2 und 3 As shown. Subsequently, to ensure axial locking, the linkage 16 is fixed to the output shaft 24. This axial locking, or fixing, of the linkage 16 to the output shaft 24 is achieved using the expanding element 38. For this purpose, the clamping element 40, designed as a clamping screw, is rotated, thereby pulling the expanding element 38 against the end face 46 of the first connecting section 30 and causing it to expand. The clamping element 40, designed as a clamping screw, is rotated until the expanding element 38 has expanded to such an extent that its circumferential side projects laterally beyond the outer contour 32 of the first connecting section 30 and clamps against the inner contour 28 provided on the output shaft 24.

[0070] This spreading process of the spreading element 38 is, for example, in Fig. 7 evident, whereby Fig. 7a The unloaded state of the spreading element 38 is shown, in which the spreading element 38 does not yet protrude laterally beyond the outer contour 32, and Fig. 7b The figure shows the already tensioned state, in which the spreading element 38 is spread open to such an extent that it protrudes circumferentially beyond the outer contour 32 and is tensioned with the inner contour 28. The linkage 16 is then attached to the output shaft 24 and can no longer unintentionally detach from it.

[0071] To prevent the expanding element 38 from rotating along with the clamping element 40 during rotation, two anti-rotation elements 52 are arranged on the end face 46 of the first connecting section 30. These anti-rotation elements 52 are designed here as extensions or raised sections that engage in corresponding slots 54 and thereby prevent the expanding element 38 from rotating (see Fig. 4, 5a und 5b ).

[0072] Alternatively, instead of these raised sections or extensions 52, other types of anti-rotation devices can be provided. For example, a roughened, toothed, or knurled surface on the end face 46 or on the underside of the expanding element 38 that contacts this end face can function as an anti-rotation device. Furthermore, it is possible that the expanding element 38 has the same toothing on its outer diameter as the first connecting section 30, which engages in the internal teeth on the output shaft 24 when the expanding element 38 is expanded, thereby preventing the expanding element 38 from rotating.

[0073] Advantageously, the spreading element 38 has several individual wing-like sections 56, which are separated from each other by the aforementioned slots 54. These wing-like sections 56, which are particularly in Fig. 5a und 5b The wings 56, which are visible, are referred to here for the sake of simplicity as wings 56. The wings 56 extend laterally in the transverse direction 58 from a sleeve 60, which forms the central part of the spreading element 38 in which the second thread 50 is arranged.

[0074] It should be noted that "transverse" in this context does not necessarily mean perpendicular or orthogonal, but rather any non-parallel orientation at an angle > 0°.

[0075] Preferably, the individual wings 56 of the spreading element 38, in an unloaded state, are angled away from the sleeve 60 at an angle of < 80° relative to the longitudinal axis 62 of the spreading element 38. This angle is Fig. 3 The angle α is indicated by the angle. Preferably, this angle α is 50°–80°, particularly preferably 65°. Tightening the clamping screw 40 increases this angle α, as the individual wings 56 are bent. This automatically increases the diameter of the expanding element 38. Dividing it into individual, separate wings 56 facilitates this bending of the expanding element 38 and increases its flexibility. This reduces assembly forces.

[0076] As from Fig. 3 As can be further seen, the longitudinal axis 62 of the spreading element 38 coincides with the longitudinal axis of the inner contour 28 provided on the second connecting section 34 and the outer contour 32 provided on the first connecting section 30 when the drive 10 is assembled. The longitudinal axis 64 of the linkage lever 18, on the other hand, is oriented transversely, preferably perpendicularly, to the longitudinal axis 62 of the spreading element 38.

[0077] Instead of shaping the outer contour 32 provided on the first connecting section 30 as an interlocking element, as is done in Fig. 2-5 As shown, this outer contour 32 on the first connecting section 30 can also be designed as a polygonal shape, e.g., a hexagonal shape, which then engages in a correspondingly polygonal or hexagonal inner contour 28 shaped as an equivalent counterpart in the output shaft 24. This is exemplified in Fig. 6a und 6b shown. In the embodiment shown therein, it is therefore equally preferred that the outer edges of the individual wings 56 of the spreading element 38 also lie on a polygonal or hexagonal outline 66 (see Fig. 6b ).

[0078] Fig. 8 Figure 1 shows an embodiment in which the spreading element 38, in its spread state, is supported against a shoulder 68 provided on the inner contour 28. The clamping element 40, designed as a clamping screw, is tightened until the outer diameter of the individual wings 56 of the spreading element 38 projects beyond this shoulder 68 and clamps against it in a positive-locking manner. This creates a positive-locking connection that is particularly secure against pull-out. If this shoulder 68 is angled, any play is eliminated when the spreading element 38 is clamped, thus ensuring that the linkage 16 is particularly securely seated in the output shaft 24. If the clamping screw 40 loosens slightly, the spreading element 38 still generates sufficient axial preload to hold the linkage 16 in position, resulting in a particularly secure connection.

[0079] Fig. 9 Figure 1 shows an embodiment in which the inner contour 28 has several parallel, annular recesses 70, which are arranged offset from one another along the longitudinal axis 62 of the inner contour 28. The spreading element 38 can engage in these recesses 70 when assembled. This has the advantage that the linkage 16 can be fixed particularly securely in various axial positions along the longitudinal axis 62 on the output shaft 24. The first connecting section 30 therefore does not need to be, as for example in Fig. 7a und 7b The actuator is shown to be inserted into the output shaft 24 up to the stop 72, but can then be fixed in any axial position on the output shaft 24. This allows for flexible adaptation to the respective installation situation of the drive 10.

[0080] Such different axial installation situations are exemplified in Fig. 10a und 10b shown. It should be noted that there are no recesses 70 here, as shown in Fig. 9 shown, are provided. In principle, this flexible axial displacement is also possible steplessly without such recesses, although the recesses 70 increase the mechanical stability.

[0081] Fig. 11 Figure 1 shows another embodiment in which the first connecting section 30 is formed on an axle extension sleeve 74, which acts as a kind of intermediate piece. The axle extension sleeve 74 is mounted rotationally fixed to a connecting piece 78 by means of a corresponding toothing 76. The connecting piece 78 is fixed to the linkage lever 18, for example, by a material bond. Depending on the desired installation situation, axle extension sleeves 74 of different lengths can then be used.

[0082] Fig. 12a-c The sectional views show three different embodiments of the spreading element 38. According to the in Fig. 12a In the first embodiment shown, the expanding element 38 is designed as a single piece and the thread 50 is cut directly into the sleeve 60 of the expanding element 38. The expanding element 38 can, for example, be designed as a stamped or bent part made of spring steel.

[0083] According to the two in Fig. 12b und 12c In the illustrated versions, the spreading element 38 is designed in two or more parts. Here, the thread 50 is integrated into an extra inner sleeve, which, according to the illustration in Fig. 12b in the embodiment shown, it is welded into the sleeve 60 and according to the Fig. 12c The embodiment shown is pressed into the sleeve 60.

[0084] Fig. 13 und 14 show a further embodiment in which the two connecting sections 30' and 34' are quasi-inverted to that in Fig. 1-5 as shown in the illustrated embodiment. In this case, the outer contour 32 is no longer located on the first connecting section, but on the second connecting section 34', which is located on the top of the output shaft 24'. Similarly, the inner contour 28 is not located on the second connecting section as before, but on the first connecting section 30', which is located on or connected to the linkage lever 18'.

[0085] The spreading element 38, however, can be designed in the same way as before. Its function is also achieved in the same manner as described above. Here, however, the clamping element 40' is not inserted into the linkage lever 18 or 18', but rather from below into a corresponding through-opening 42' located inside the output shaft 24'.

[0086] All other previously mentioned variations and implementation options can also be found in the Fig. 13 und 14 The illustrated embodiment is used. Bezugszeichenliste

[0087] 10, 10'Door or window drive 12Electric motor 14, 14'Gearbox 16, 16'Linkage 18, 18'Linkage lever 20Gearbox housing 22Gear 24, 24'Output shaft 26Bearing 28Inner contour 30, 30'First connecting section 32Outer contour 34, 34'Second connecting section 36Weld point 38Expanding element 40, 40'Clamping element 42, 42'Through opening 44Through opening 46End face 48First thread 50Second thread 52Anti-rotation element 54Slots 56Wing 58Transverse direction 60Sleeve 62Longitudinal axis 64Longitudinal axis 66Outline 68Recess 70 Recesses 72 Stop 74 Axle extension sleeve

Claims

1. Door or window drive (10), comprising: - an output shaft (24, 24'); - a linkage lever (18, 18') that can be coupled to the output shaft (24, 24'); - a first connecting section (30, 30') that is formed on the linkage lever (18, 18') or that can be connected to the linkage lever (18, 18') in a rotationally fixed manner; - a second connecting section (34, 34') that is formed on the output shaft (24, 24') or that can be connected to the output shaft (24, 24') in a rotationally fixed manner; - an expandable spreading element (38); and - a clamping element (40, 40') that cooperates with the spreading element (38) and by means of which the spreading element (38) can be expanded;wherein one of the first or the second connecting section (30, 34') has an outer contour (32) and the other of the first or the second connecting section (30', 34') has an inner contour (28) corresponding to the outer contour (32), wherein the inner contour (28) and the outer contour (32) interlock positively in the assembled state of the door or window drive (10) in order to transmit a torque from the output shaft (24, 24') to the linkage lever (18, 18'), and wherein the spreading element (38) is configured to be inserted into the inner contour (28) and spread open by means of the clamping element (40, 40') in order to clamp with the inner contour (28) and to fasten the linkage lever (18, 18') to the output shaft (24, 24').

2. Door or window drive (10) according to claim 1, wherein the connecting section (30, 34') on which the outer contour (32) is arranged has a through opening (42, 42') through which the clamping element (40, 40') can be passed, and an end face (46) surrounding the through opening (42, 42') against which the spreading element (38) is pulled by means of the clamping element (40, 40') in order to be spread open.

3. Door or window drive (10) according to claim 2, wherein the end face (46) and / or the spreading element (38) has at least one anti-rotation element (52) by which rotation of the spreading element (38) relative to the end face (46) is prevented by force, form and / or friction.

4. Door or window drive (10) according to one of claims 1-3, wherein the clamping element (40, 40') has a clamping screw with a first thread (48) which engages in a second thread (50) formed on the spreading element (38).

5. Door or window drive (10) according to one of claims 1-4, wherein the spreading element (38) extends along a longitudinal axis (62) and the spreading element (38) is configured to spread out along a radial direction oriented transversely to the longitudinal axis (62).

6. Door or window drive (10) according to one of claims 1-5, wherein an outer diameter of the spreading element (38) in the unloaded state is smaller than an inner diameter of the inner contour (28).

7. Door or window drive (10) according to one of claims 1-6, wherein the spreading element (38) has a sleeve (60) extending along the longitudinal axis (62) of the spreading element (38) and at least one wing (56) projecting from the sleeve (60) in a transverse direction (58) extending transversely to the longitudinal axis (62) of the spreading element (38), the orientation of which is changeable for spreading the spreading element (38) relative to the longitudinal axis (62) of the spreading element (38).

8. Door or window drive (10) according to claim 7, wherein the at least one sash (56) is inclined in the unloaded state at an angle (α) of less than 90°, preferably less than 80°, particularly preferably less than 70°, relative to the longitudinal axis (62) of the spreading element (38).

9. Door or window drive (10) according to claim 7 or 8, wherein the at least one leaf (56) has several separate leaves which are arranged distributed along a circumference of the sleeve (60).

10. Door or window drive (10) according to one of claims 1-9, wherein the outer and inner contour (28, 32) in the mounted state of the door or window drive (10) extends along the longitudinal axis (62) of the spreading element (38) and transversely to a longitudinal axis (64) of the linkage lever (18, 18').

11. Door or window drive (10) according to one of claims 1-10, wherein the outer contour (32) has a toothing or a polygon.

12. Door or window drive (10) according to one of claims 1-11, wherein the inner contour (28) has a shoulder (68) on which the spreading element (38) is supported in the spread state, or wherein the inner contour (28) has several parallel recesses (70) spaced apart from each other along a longitudinal axis (62) of the inner contour (28), into which the spreading element (38) can engage in the spread state.

13. Door or window drive (10) according to one of claims 1-12, wherein the first connecting section (30, 30') is arranged on an axle extension sleeve (74) which can be attached to a connecting piece (76) which is fixedly connected to the linkage lever (18, 18'), wherein the axle extension sleeve (74) and the connecting piece (76) are held together in the assembled state by the clamping element (40, 40') and the spreading element (38).

14. Linkage (16) for a door or window drive (10), comprising: - a linkage lever (18) that can be coupled to an output shaft (24) of the door or window drive (10); - a first connecting section (30) that is formed on the linkage lever (18) or that can be connected to the linkage lever (18) in a rotationally fixed manner; - an expandable spreading element (38); and - a clamping element (40) that cooperates with the spreading element (38); wherein the first connecting section (30) has an outer contour (32) via which a torque can be transmitted from the output shaft (24) to the linkage lever (18), and wherein the spreading element (38) can be spread open by means of the clamping element (40) such that the spreading element (38) extends laterally beyond the outer contour (32) in the spread state.

15. Gearbox (14') for a door or window drive (10), comprising: - an output shaft (24') which can be coupled to a linkage lever (18') of the door or window drive (10); - a second connecting section (34') which is formed on the output shaft (24') or can be connected to the output shaft (24') in a rotationally fixed manner; - an expandable spreading element (38); and - a clamping element (40') which cooperates with the spreading element (38); wherein the second connecting section (34') has an outer contour (32) via which a torque can be transmitted from the output shaft (24') to the linkage lever (18'), and wherein the spreading element (38) can be spread by means of the clamping element (40') such that the spreading element (38) in the spread state extends laterally beyond the outer contour (32).

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