Drive device comprising a gear rack element for a slidable leaf in the form of a sliding leaf or a slidable lift-and-slide leaf of a window or of a door

Abstract

The invention relates to a drive device (1) for a slidable leaf (2) in the form of a sliding leaf or a slidable lift-and-slide leaf of a window or of a door (3) comprising a frame (4) in which the leaf (2) is slidably held, wherein the drive device (1), in order to slide the leaf (2), has a leaf-side drive (12) with a threaded spindle (13) which is driven on the drive and which is positively guided about a gear rack element (26) arranged on the frame (4), wherein the gear rack element (26) can be secured by being enclosed by the guide rail (5) and is made of tooth segments (11) which can be connected modularly to one another and form an integral unit.

Description

[0001] Drive device with a rack element for a sliding sash or sliding lift-sliding sash of a window or door

[0002] The invention relates to a drive device with a rack element for a displaceable wing as a sliding wing or displaceable lift-sliding wing of a window or a door according to the preamble of claim 1.

[0003] The sliding sashes of sliding sash or lift-and-slide sash systems for windows or doors often have a relatively high mass. When the movable sash is moved, especially when pushed from a stationary position, a high force must be absorbed to open the system. Closing the system also requires resistance to the weight of the movable sash. Conventional drives are mounted visibly on the window or door and shielded by an additional cover, which severely impairs the appearance. Visible components also increase the risk of injury during installation. Furthermore, visible components offer more opportunities for external manipulation. Installing such a drive device is also complex, given the current state of the art.

[0004] Concealed drives are also known, but these can only be integrated with considerable effort and into only a few suitable profile systems. In particular, the milling effort required in the profile proves to be very high, which can lead to high costs and weaken the structure of the window or door elements.

[0005] EP 2 063 058 B1 discloses a sliding window or sliding door with a frame in which at least one sliding sash is movably mounted, which is movable via a drive and can be coupled to the frame via locking means. The sliding sash has four frame profiles fixed to one another. The drive comprises a driven drive roller around which a tensioning element fixed to the frame is wound. The tensioning element is guided over two deflection rollers and enters a hollow chamber of the frame profile.

[0006] Due to its vertical installation in a vertical spar of the sash, this control device can only be accessed via a guide rail deflection, which complicates installation and requires a significant amount of space within the sash. Furthermore, the control device components are spaced widely apart from the guide rail, making assembly difficult due to the individual components.

[0007] Further reference is made to EP 1 914 372 A2. This discloses a passenger door for public transport vehicles, designed as a sliding door or pivoting-sliding door, with at least one door leaf that is longitudinally displaceable and suspended in a support guide and guided thereon. The support guide comprises a linear guide with at least one guide rail, on which a guide carriage is guided and on which the door leaf is suspended via a support arm. Due to its structural design, the support guide cannot be concealed in a window or door system. Furthermore, the design is complex to assemble and, with a large number of components, expensive to manufacture.

[0008] Furthermore, EP 3 775 460 B1 is known for a door or window. A sliding lift-and-slide sash is held in a frame so that it can be lifted and moved. A drive device for moving the sash comprises an electric drive arranged on the sash side with a threaded spindle driven thereon, and is mounted in a housing. The drive device is arranged on the frame and is positively guided around a rack element on the frame that can be adjusted horizontally.When the sash is installed in the frame, the drive mechanism is almost completely concealed in a recess or receiving groove in an upper, horizontal stile of the sash and a guide rail arranged on the frame. It allows vertical movement of the sash relative to the frame. One side of the drive mechanism facing the frame is connected to the components attached to the frame and can be moved horizontally. The drive mechanism is connected to the movable sash in a fixed position, allowing horizontal movement of the movable sash in the longitudinal direction of the frame while maintaining a constant vertical position relative to the frame. For movable adjustment, the rack element consists of individual toothed segments which are mounted in the guide rail through an opening in the guide rail and can be secured.

[0009] The object of the present invention is to eliminate the known deficiencies and, in contrast, to provide a drive device for a sliding sash as a sliding sash or lift-slide sash for large load-bearing capacities and optimal guidance for a window or door at low cost and in a small installation space, which can also be subsequently mounted, adjusted and dismantled in a simple, fast, safe and precise manner, but in particular further simplifies the installation.

[0010] This object is achieved by a drive device with a rack element for a displaceable wing as a sliding wing or displaceable lift-sliding wing of a window or a door with the features of patent claim 1.

[0011] The drive device is arranged in such a way that it is suitable for a sliding sash or a sliding lift-and-slide sash for a window or door. The movable sash further comprises at least two carriages, each with rollers, for sliding on a track in a direction parallel to the extension of a stationary sash or door panel or along a track. For automatically sliding operation of the movable sash, an operating element with a switch is provided on a vertical stile, which controls the drive device. By operating the operating element, the movable sash can be moved, for example, from a closed position into an open position relative to a fixed frame and a stationary sash or door panel.On the other hand, the movable sash can also be moved into a secure, offset ventilation position or into the area of ​​a passage opening. The movable sash is supported on a guide rail on the frame via carriages located at the bottom.

[0012] It is also possible to operate the drive device via a remote control unit or a smart home system.

[0013] The operating element can also control a motorized drive located at the front of the vertical beam in the closing direction, which also moves the locking means located on the vertical beam into a locked closed position or into an unlocked open position of the movable sash. Manual operation using an operating handle with transmission of an operating rod to the locking means is also conceivable.

[0014] In a system of a sliding lift-sliding sash, a window or a door, the movable sash can be moved by the drive via the operating element automatically or via the manual operating handle from the closed position through a coupled connection of the operating rod to the carriages into a raised opening position in order to then be able to be moved by the drive device.

[0015] Likewise, both of the above-described actuation variants can be installed in a window or door, which can be selected according to requirements and resemble the nature of a hybrid system. Additional drives selected within the system are also connected to the control and / or power lines and linked to the control unit.

[0016] In order to enable these positions of the movable sash relative to the fixed frame as well as to the fixed sash or the fixed door panel, a special fitting arrangement, namely a so-called system for sliding sashes or sliding lift-slide sashes, is provided between the movable sash and the fixed frame.

[0017] Advantageously, the drive device for moving the sliding sash comprises a drive arranged on the sash side with a motor and a threaded spindle driven by the motor. The threaded spindle is positively guided around a rack element arranged on the frame.

[0018] To simplify assembly, all components of the drive device are mounted in a guide rail before installation and / or operatively coupled to the guide rail. The modular arrangement of components with structurally identical toothed segments according to the invention, which can be inserted into the profile groove or channel of the guide rail from the open side of the guide rail or preferably through a widened recess in an opening in the guide rail with a T-shaped cross-section, is convincing as a simple way of installing a rack element in the guide rail. The toothed segment is designed separately in terms of its contour and length to allow the toothed segments to be inserted, preferably through the widened recess located in the slot-like opening extending the entire length of the guide rail.

[0019] The toothed segment is advantageously made of a plastic manufactured by injection molding or a die-casting process and has a T-shaped cross-section with its outer casing. The T-shaped shape of the toothed segment is preferably adapted to the cross-sectional shape of the profile groove of the guide rail. When inserted, the toothed segment rests against a guide surface in a forming interior space within the cross-section of the profile groove and, opposite, rests on lateral webs that define the slot-like opening of the guide rail.

[0020] While maintaining a one-piece and cost-effectively manufactured object of the toothed segment, the toothed segment is designed to be flat in its surface for assembly through the widened recess in the slot-like opening of the guide rail and for modular linking of individual toothed segments at the respective abutting ends. Furthermore, the toothed segment is divided in cross-section by an axis of symmetry and stepped into two sections, with the first wide section of the toothed segment being almost completely encompassed by the profile groove of the guide rail when assembled, and the stepped second and narrower section being guided through the opening in the guide rail and bordering the webs. The narrow section, with tooth flanks for the drive's gear spindle arranged on the visible cover surface, protrudes into a free operating field.

[0021] Due to the equally designed flat ends of the tooth segments and with a cross-section that remains unchanged over the entire length of the tooth segment through the axis of symmetry, it is possible to insert the tooth segments on the left and right sides into the extended recess of the guide rail using simple means and to enable error-free assembly by shaping the cross-section to the cross-section of the profile groove of the guide rail.

[0022] As soon as further tooth segments with the same structure have reached the longitudinally displaceable, rear-engaging position in the profile groove of the guide rail, the tooth segments can be joined together at the respective ends by means of a flush system to form a structural unit of a rack element.

[0023] Once the longitudinal installation position has been reached, i.e. the final assembly state of the rack element in the profile groove of the guide rail, the toothed segments are connected flush and free of play and are operatively connected to the carriage on the drive and the threaded spindle of the drive. For this purpose, the toothed segments have the beginnings of tooth flanks on the cover surface in the direction of the sash-side components of the drive, which, in effective connection with the threaded spindle, convert a rotary movement into a translatory movement for moving the sash in the longitudinal direction of the guide rail. In addition, the toothed segments form an internal T-shaped guide groove in cross-section and in the longitudinal extension of the tooth segments, which divides the tooth flanks on the cover surface by an opening in the axis of symmetry of the tooth segments.Through the opening and with the carriage engaging behind the T-shaped guide groove of the toothed segment, the drive is guided in a form-fitting manner within the toothed segment. At the same time, the connection of the carriage to the toothed segment creates a flexible coupling between the movable sash and the frame of the window or door.

[0024] A further preferred embodiment is characterized in that the toothed segments, which are identical in length and design, are joined in a plurality of them so that they can be moved through the recess into the profile groove. Before being inserted into the profile groove, a toothed segment is positively connected to the threaded spindle of the drive and is then inserted, preferably in conjunction with the drive, into the widened recess and brought into a position engaging behind the profile groove for a movable hold in the guide rail. The play-free and seamless connection of the toothed segments of the rack element achieves a silent, horizontally displaceable movement of the threaded spindle of the drive during adjustment of the movable sash relative to the frame.

[0025] The number of tooth segments is determined by the length of the guide rail, which in turn is determined by the length of the window or door frame. The number of tooth segments can be preconfigured. The length of the drive mechanism in the guide rail and the length of the guide rail itself have a controllable dimension based on the length of the window or door and / or the opening width of the sliding sash, which serve as a suitable reference for the number of tooth segments.

[0026] Preferred embodiments of the invention are shown schematically in the drawing and are explained in more detail below with reference to the figures of the drawing.

[0027] They show:

[0028] Fig. 1 is a perspective view of a sliding sash as a sliding sash or sliding lift-sliding sash of a window or door,

[0029] Fig. 2 is a perspective view of a window or door according to Fig. 1 with a frame and a drive device arranged in a guide rail without the sliding sash as a sliding sash or sliding lifting-sliding sash,

[0030] Fig. 3 an exploded view of the drive in the contact-free zone and a toothed segment in a pre-positioned position for mounting on the drive,

[0031] Fig. 4 is a perspective view of the drive according to Fig. 3 in contact position and mounted position of a toothed segment with a threaded spindle of the drive,

[0032] Fig. 5 is a perspective section of the drive device with the drive and toothed segments of the rack element arranged thereon according to Fig. 2,

[0033] Fig. 6 is a perspective view of a tooth segment, Fig. 7a is a top view of the tooth segment according to Fig. 6,

[0034] Fig. 7b is a sectional view of the tooth segment of Fig. 7a,

[0035] Fig. 8a shows a section of the guide rail in a plan view from a side facing the movable wing with a visible opening,

[0036] Fig. 8b a sectional view of the guide rail according to Fig. 8a,

[0037] Fig. 9 a perspective section according to Fig. 2 of the drive with a coupled toothed segment for a possible assembly through a first recess in a profile groove of the guide rail and

[0038] Fig. 10 is a sectional view of the guide rail, the drive and a toothed segment mounted in the guide rail as shown in Fig. 9.

[0039] Fig. 1 shows a perspective view of a window or door 3, a frame 4 with a sliding sash 2 and a fixed sash or door panel 60 which is adjacent to the latter. To operate the movable sash 2, an operating element 61 with a switch which controls a drive device 1 is provided on a vertical beam 62. By operating the operating element 61, the movable sash 2 can be moved, for example, from the closed position shown in Fig. 1 into a position (not shown) in the direction of the arrow relative to the fixed frame 4 and the fixedly mounted sash or door panel 60, but can also be brought into a secured, displaced ventilation position or into the area of ​​a passage opening. The sliding sash 2 is connected to the sliding door via one or more hanging or, as shown in Fig.1 is held movable on the frame 4 by means of carriages 65 on the floor side, supported on a guide rail 64.

[0040] Operation of the drive device 1 via a remote control unit or a smart home system is also conceivable. For this purpose, a radio system is provided in the wall, with the control units distributed across the drive components in the sliding sash 2. Likewise, a power source 24 and, if necessary, a control unit 29 can be provided on the window or door 3 according to Fig. 1. The power source 24 and the control unit 29 can also be housed in a wall of a building 30 and are connected to the operating element 61 and the drive device 1 via control and / or power lines 22. The operating element 61 can also control a drive 66, schematically shown at the front of the vertical beam 62 in the closing direction, which drive also transfers locking means (not shown) on the vertical beam 62 into a locked closed position or into an unlocked open position of the movable sash 2.Manual actuation by means of an actuating handle with transmission of an actuating rod to the locking means is also conceivable.

[0041] In a system of a sliding lift-and-slide sash 2 of a window or door 3, the movable sash 2 can be moved by the schematically illustrated drive 66 via the operating element 61 automatically or via the manual actuating handle from the closed position shown in Fig. 1 by a coupled connection of the actuating rod to the carriages 65 into a raised opening position in order to then be able to be moved by the drive device 1.

[0042] Likewise, both of the above-described actuation variants can be arranged in a window or door 3, which can be selected according to requirements and resemble the character of a hybrid system. Additional drives selected for the system are also connected to the control and / or power lines 22 and linked to the power source 24 and the control unit 29.

[0043] In order to enable these positions of the movable wing 2 relative to the fixed frame 4 as well as to the fixed wing or the fixed door panel 60, a special fitting arrangement is provided between the movable wing 2 and the fixed frame 4, namely a so-called system for sliding sashes or sliding lift-slide sashes, of which in Fig. 1, for the sake of simplicity, only the operating element 61 on the movable wing 2, a part of a lower guide rail 64 arranged on the lower horizontal beam 69 for the carriages 65 and an upper guide rail 5 can be seen.

[0044] According to Fig. 3, the drive device 1 comprises a drive 12 with a threaded spindle 13 driven thereon. According to Fig. 4 and Fig. 5, the threaded spindle 13 is positively guided around a rack element 26 arranged on the frame 4, consisting of individual toothed segments 11. According to Fig. 1, the drive device 1, in the installed position of the movable sash 2, is arranged almost completely concealed in a recess or receiving groove 27 of an upper, horizontal beam 67 of the movable sash 2 and a guide rail 5 arranged on the upper horizontal beam 19 of the frame 4.

[0045] The drive 12 and the threaded spindle 13 are mounted in a housing 28 as a structural unit according to Fig. 3. The toothed segments 11 of the rack element 26 are mounted as shown in Fig.

[0046] 9 are almost completely encompassed by a so-called profile groove 7 of the guide rail 5 and rest in the profile groove 7 in a form-fitting manner, secured against falling out. A gap in the guide rail 5 forms in the installed position of the guide rail 5 on the frame 4 according to Fig.

[0047] 10 an opening 6 pointing in the direction of the sliding sash 2 and thus the possibility of coupling between the components arranged on the movable sash 2 and the components of the drive device 1 mounted on the frame 4. The drive 12 with the threaded spindle 13 is coupled in a drive-connected manner according to Fig. 1 and Fig. 4 in the longitudinal direction to the sliding direction of the movable sash 2 for a rotational transmission of the movement by means of a tooth transmission.

[0048] According to Fig. 1, the movable sliding sash 2 comprises four stiles which are designed as hollow profiles, in particular as aluminum or plastic profiles or as solid profiles made of wood. The stiles, such as the described stiles 62, 63, 67 and 68 according to Fig. 1, contain prefabricated recesses or receiving grooves for the concealed installation of fitting components. For example, the drive device 1 is provided in the upper horizontal stile 67 in the receiving groove 27 according to Fig. 1 and is arranged facing the vertical stile 68. Preferably, the sash-side components of the drive device 1, in particular the housing 28 of the drive 12, according to Fig. 3 are designed to be adapted in height H and width B to the recess or receiving groove 27 according to Fig. 1 of the upper horizontal stile 67 of the movable sash 2.

[0049] To simplify assembly, all components of the drive device 1 are mounted in the housing 28 and in the guide rail 5 before installation. The modular arrangement of components of structurally identical toothed segments 11 according to the invention according to Fig. 5 to Fig. 7, which can be inserted from the open side and the end of the guide rail 5 according to Fig. 8 or through a widened recess 8 according to Fig. 7 at the opening 6 of the guide rail 5, which has a T-shaped cross-section, into the profile groove 7 or the channel of the guide rail 5, is convincing as a simple handling for the assembly of the rack element 26 in the guide rail 5. The toothed segment 11 is designed separately in terms of its contour and length to insert the toothed segments 11 through the recess 8 at the slot-like opening 6 extending over the entire length of the guide rail 5.

[0050] The toothed segment 11 according to the invention consists of a plastic produced by injection molding or a die-casting and has a T-shaped cross-section with its outer shell. The T-shaped design is adapted to the cross-section of the profile groove 7 of the guide rail 5. In the inserted state according to Fig. 10, the toothed segment 11 rests in the interior of the profile groove 7 with the resulting side surfaces 9, 9' supported on webs 10, 10' of the profile groove 7. For assembly, the toothed segments 11 are inserted according to Fig. 8 and Fig. 9 through the slot-like opening 6 with the widened recess 8 into the profile groove 7 of the guide rail 5. Movable in the profile groove 7, individual tooth segments 11 form a modular linkage with fusion to a rack element 26 according to Fig.2 and Fig. 5 by abutting flat surfaces at the first and second ends 14, 15 of the tooth segments 11. Furthermore, the tooth segment 11 according to Fig.7 is divided in cross-section by an axis of symmetry 16 and is stepped transversely to the axis of symmetry 16 into two sections 17, 18, wherein the first wide section 17 of the toothed segment 11 is almost completely encompassed by the profile groove 7 of the guide rail 5 in the assembled state, wherein the stepped second and narrower section 18 with its side surfaces 9, 9' forming the step assumes a supporting, engaging and displaceable position in the profile groove 7 of the guide rail 5. Further according to Fig. 7 and Fig. 10, a further part of the narrower section 18 projects through the opening 6 of the guide rail 5 with a visible cover surface 20 in the direction of the displaceable wing 2 into a free actuation field and correspondingly has tooth flanks 21 for the gear spindle 13 of the drive 12. The tooth flanks 21 are according to Fig. 7a in the longitudinal direction of the length L of the tooth segment 11 according to Fig.6 running transversely to the axis of symmetry 16 at an angle W and formed at a fixed distance A from one another. By forming the tooth flanks 21 at the angle W over the section 18 and the distance A over the length L, with identically formed flat ends 14, 15 of the tooth segments 11 according to Fig. 6 and by a cross-section that is unchanged over the entire length L of the tooth segment 11 according to Fig. 7, it is possible to insert the tooth segments 11 on the left and right sides into the enlarged recess 8 of the guide rail 5 using simple means and to carry out error-free and perfect assembly without instructions by shaping the cross-section to the profile groove 7 of the guide rail 5.

[0051] Upon reaching the longitudinal installation position, ie the final assembly state of the rack element 26 in the profile groove 7 of the guide rail 5 according to Fig. 2, the toothed segments 11 are connected to one another without play and flush with one another and are operatively connected to a carriage 23 located on the drive 12 and the threaded spindle 13 of the drive 12 according to Fig. 4 and Fig. 10 within a travel path of the drive 12 and thus a position of the movable wing 2 within the guide rail 5 with individual toothed segments 11. For this purpose, the tooth flanks 21 are arranged on the tooth segments 11 on the cover surface 20 in the direction of the wing-side components of the drive 12 according to Fig. 5 and Fig. 10, which, in effective connection with the threaded spindle 12, convert a rotary movement into a translatory movement for displacing the movable wing 2 in the longitudinal direction of the guide rail 5. In addition, the tooth segments 11 according to Fig. 7 and Fig.10 in cross-section and in the longitudinal extension of the tooth segments 11, an internally T-shaped guide groove 25 which divides the tooth flanks 21 on the cover surface 20 according to Fig. 7a and Fig. 7b through an opening 31 in the axis of symmetry 16 of the tooth segments 11. For this purpose, the carriage 23 of the drive 12 engages, according to Fig. 9, through the opening 31 in a T-shaped undercut of the guide groove 25 of the tooth segment 11 in a form-fitting manner.

[0052] With the positive connection by the carriage 23 of the drive 12 and the guide groove 25 of the toothed segment 11 according to Fig. 4 and Fig. 10, the components of the drive device 1 arranged on the frame 4 are coupled in a displaceably holding drive-connected manner to the components of the components fastened to the movable sash 2.

[0053] For this purpose, the carriage 23 is fixedly mounted in the drive 12 and thus on the housing 28. The carriage 23, as shown in Fig. 3, which is secured against rotation in the housing 28, can be moved along the guide rail 5 during the sliding movement of the movable sash 2 toward the frame 4. For this purpose, the threaded spindle 13 is rotationally connected to the rack element 26 and thus to the individual toothed segments 11.

[0054] List of reference symbols

[0055] 1 drive device

[0056] 2 sliding sashes / lift-sliding sashes

[0057] 3 windows or doors

[0058] 4 frame

[0059] 5 Guide rail

[0060] 6 Opening

[0061] 7 profile groove

[0062] 8 Recess

[0063] 9.9' side surface

[0064] 10, 10' jetty

[0065] 11 tooth segment

[0066] L Length (tooth segment)

[0067] 12 Drive

[0068] 13 Threaded spindle

[0069] 14 first end

[0070] 15 second end

[0071] 16 axis of symmetry

[0072] 17 first section (wide)

[0073] 18 second section (narrow)

[0074] 19 upper horizontal beam (frame)

[0075] 20 deck area

[0076] 21 Tooth flank

[0077] 22 Control and / or power line

[0078] 23 sleds

[0079] 24 network / power source

[0080] 25 guide groove

[0081] 26 Rack element

[0082] 27 Recess / receiving groove

[0083] 28 housings

[0084] 29 Control unit

[0085] 30 building wall

[0086] 31 Opening

[0087] H Height

[0088] B Width

[0089] W angle (tooth flank)

[0090] A Distance 60 leaf / door panel

[0091] 61 Control element

[0092] 62 vertical stile lock (sliding sash)

[0093] 63 horizontal beam below (sliding sash) 64 guide rail

[0094] 65 carriages

[0095] 66 drive (vertical)

[0096] 67 horizontal beam above (sliding sash)

[0097] 68 vertical stile web (sliding sash) 69 lower horizontal stile (frame)

Claims

Claims 1. Drive device (1) for a displaceable sash (2) as a sliding sash or displaceable lift-and-slide sash of a window or door (3), with a frame (4) in which the sash (2) is displaceably held, wherein the drive device (1) for displacing the sash (2) comprises a drive (12) arranged on the sash side with a threaded spindle (13) driven thereon, which is positively guided around a rack element (26) arranged on the frame (4), wherein the rack element (26) is almost completely encompassed by a guide rail (5) of the drive device (1) having a profile groove (7) in the cross-section of the guide rail (5) and is composed of a series of toothed segments (11) running successively in the direction of displacement of the sash (2) and fixedly inserted in the guide rail (5), characterized in thatthat the toothed segments (11) for insertion into the profile groove (7) of the guide rail (5) each have mutually facing, identically designed ends (14, 15) and form a continuous, integral component in the longitudinal direction without any transition, wherein the toothed segments (11) extending in cross-section through an axis of symmetry (16) form two guide-forming sections (17, 18) on the outside in a T-shaped manner, which divide the toothed segments (11) into a first wide section (17) and a narrow second section (18), wherein the first section (17) is held displaceably in a form-fitting manner by the profile groove (7) and the second section (18) projecting through an opening (6) of the guide rail (5) into a free operating field on a visible cover surface (20) facing the movable wing (2) has projections of thread flanks (21) which extend transversely to the direction of displacement at an angle (W) are formed at a fixed distance (A) from each other., 2. Drive device (1) according to claim 1, characterized in that the respective ends (14, 15) of the toothed segments (11) have a flat plane and are positioned in the profile groove (7) of the guide rail (5) in a row with no play and flush with the surface.

3. Drive device (1) according to claim 1, characterized in that the tooth flanks (21) with effective connection to the threaded spindle (13) of the drive (12) convert a rotary movement into a translatory movement to Convert the movement of the movable wing (2) in the longitudinal direction of the guide rail (5).

4. Drive device (1) according to claim 1, characterized in that the toothed segments (11) in cross section and in the longitudinal extent of the toothed segments (11) forms an internally T-shaped guide groove (25) which divides the tooth flanks (21) on the cover surface (20) by an opening (31) in the axis of symmetry (16) of the tooth segments (11), into which a carriage (23) of the drive (12) engages, engaging behind the opening (31), in a form-fitting and movable manner.

5. Drive device (1) according to claim 1, characterized in that the tooth segments (11) are produced from a plastic material using an injection molding process.

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