EP1863990B1 - Driving rod drive - Google Patents

Abstract

The invention relates to a drive for a driving rod (1) for a window or door, wherein a toothed wheel (7) which is, for example manually controlled by a hand lever, is rotationally mounted in a housing (4). A driving rod (3) movable along the housing (4) and directly or indirectly interacting with the teeth of the toothed wheel (7) is associated therewith. Abutments (13) extending in a parallel position to the axis of rotation (14) of the toothed wheel (7) are provided in the housing (4) for the hand lever fixing elements. Said housing (4) comprises two housing halves (5,6) in which the toothed wheel (7) bearing is placed. A spacer (8) is arranged between the housing halves (5,6) and comprises the abutments for the hand lever fixing elements and fixing elements connectable to said housing halves (5,6). The aim of said invention is to design a drive for the driving rod drive consisting of individual parts which are easily producible at low cost and mountable without any problem. For this purpose, the housing halves consist of identical plates (5, 6), the spacer (8) is embodied in the form of an angled metal sheet section which is placed between said plates and comprises at least one vertical web (15) which extends along the axis of rotation (14) of the toothed wheel (7) and is associated with said plates (5, 6) for fixing, the spacer (8) length approximately corresponds to the space between the fixing elements, and the abutments (13) are mounted on said spacer.

Description

The invention relates to a drive rod drive according to the preamble of claim 1.

Such drive rod drives have already become known, for example by the DE 23 45 496 A1 , The known drive rod drive consists of a housing in which a gear is rotatably mounted. The gear can via a polygonal socket and this enforcing Mehrkantdom z. B. be driven manually via a hand lever. The gear is associated with a displaceable along the housing drive rod, which carries locking elements which cooperate with stationary locking engagements of the frame.

The drive rod interacts directly or indirectly with the toothing of the toothed wheel, for example by the teeth of the toothed wheel engaging in recesses of the drive rod. In order to ensure the drive connection and to fix the drive to the wing, abutments for fastening elements, e.g. provided the hand lever, which are formed as parallel to the axis of rotation of the gear threaded bores.

The known housing consists of two housing halves, in each of which one of the bearings of the gear is arranged. Between the housing halves spacers are mounted, which include the abutment for the fastening elements of the hand lever and containing the fastening means for connection to the plates.

The drive rod drive can be produced from a few items, namely the gear, the two housing halves, the two spacers, the drive rod and the espagnolette final cuff track.

The disadvantage here is that the insertion of the spacers brings a comparatively large effort with it, the two components must be handled. In the design taken the drive rods and cuff rails must be part of the drive, ie all components must be mounted together. Although the housing halves as well as the gear and spacers can be used for a variety of espagnolette drives, this provides one great manufacturing effort, since the relatively long cuff rails and drive rods in automated assembly systems are difficult to handle.

Also, the shape of the housing halves is only partially suitable due to the connecting elements for automatic mounting of the drive rod drive

The object of the invention is therefore to provide a drive rod drive, which consists of simple and inexpensive to manufacture items and also allows easy installation.

The solution of this problem is achieved for a generic drive rod drive by the realization of the features of the characterizing part of claim 1.

The design allows a production of both housing halves by a stamping bending process, so that they can be produced very easily and inexpensively in large quantities, without the mechanical stability suffers. The handling of only a single spacer facilitates the assembly, regardless of whether this is done manually or automatically. Since the spacer is formed from a sheet metal section, also here the production can be done very inexpensively. Since the two halves of the housing are identical, they can be singulated and fed very easily in a mounting device. The spacer already connects the plates, so that this does not have to be used otherwise provided by the prior art faceplate. This can therefore be attached at a later date to the already finished housing or the module. As a result, the assembly can be divided essentially into two sub-steps. In a first partial step, the housing is made from the two plates and the gear through the one spacer. In a second step, the finished housing is mounted on the faceplate together with the drive rod.

The storage of the espagnolette drives is relieved, since the housing can be made in a large number and stored, while to be interpreted according to the dimensions of the respective windows or doors cuff rails and rods in lesser quantities can be produced.

Further advantageous embodiments will become apparent from the claims 2 to 10.

According to claim 2, the transverse web should be assigned to the gear on the drive rod side facing and thereby be penetrated by the gear near-its storage in a slot opening. As a result, the drive rod drive can be made more compact with increased load capacity. If you were to arrange the spacer - seen from the drive rod - behind the gear, then the case would be in this direction to enlarge accordingly, which would also have a larger installation space. The attachment of the two plates was thereby also exclusively in the edge region of the plates, so that this component would require in the further production of the drive rod drive a special and careful handling. The now proposed solution allows not only the more compact design but also a much less sensitive design of the housing as a single part of the drive rod drive. The found arrangement creates a U-shaped installation space, which is bounded on the one hand by the plates laterally and on the other hand by the spacer transversely thereto. This installation space serves the drive rod as a guide.

In order to make it possible to use the individual components for other necessary dimensions of the drive rod drive is provided that the gear interacts only indirectly via an intermediate piece with the drive rod and the intermediate piece is guided by the housing halves and the spacer. In particular, in conjunction with the aforementioned guide, this results in a simplification of the drive rod drive, since the intermediate piece requires no additional guidance in the housing. As a result, the intermediate piece can also be introduced from above into the installation space in a simple manner, ie, likewise does not have to be mounted together with the housing. The device with which the drive rod drives are mounted, in which the gear interacts directly with the drive rod and the device for mounting the drive rod drives with the intermediate piece can therefore be identical if the device can accommodate both housing dimensions. The mounting device is thereby further exploited, which in turn reduces the cost.

A further embodiment provides that the bearing of the gear in the plate is formed by a funnel-shaped inwardly retracted opening. As a result of this measure creates a larger bearing surface of the gear in the housing and The wall thickness of the plates can be reduced without reducing the bearing surface of the gear. Due to the smaller plate thickness while also the production of the funnel-shaped opening is facilitated. The bearing pins of the gear act due to the design in the loading direction not together with the punching edge of the opening but with the actually unprocessed surface of the plate, so that the expected wear is reduced.

For the cost-effective production of the drive rod drive, it is also advantageous if the spacer has a substantially T-shaped cross-section. This shape allows for easy production from the sheet metal section A U-shaped spacer, which is also conceivable according to claim 1, would be more expensive to produce.

The manual as well as the automated production of the drive rod drive is simplified by the plates are formed symmetrically transverse to the longitudinal axis. The transverse symmetry allows the unmistakable assembly of the housing or the plates. In particular, when separating the plates of the necessary effort is reduced.

It is also envisaged that the gearwheel is formed as a disk-shaped body encapsulated in plastic and the bearing journals projecting beyond the disk plane are formed from the plastic. As a result, it is also possible to produce the toothed wheel as a simple stamped body and optimally configure the bearing journals. In particular, in conjunction with the measures according to claim 4 can be a wear behavior positively influencing material combination and workpiece shape realize.

In order to maintain the symmetry of the housing is further provided that the plates have facing each other bends, which are supported on a web of the opposite plate or the spacer. It would of course be conceivable to attach to the plates in each case one in the direction of the other plate projecting web or bend, with the webs or bends of the plates point-symmetrical opposite to the axis of rotation of the gear. Each of the bends would then rest directly on the other plate. As a result, however, the symmetry of the plates would no longer be guaranteed, so that this influence the design of the mounting device would. The bends an additional support of the plates relative to the spacer and thus also achieved against each other Preferably, the support is in the region of the fastening elements of the hand lever and an extension of the T-bridge of the T-shaped spacer, so that the rear housing edge of the drive rod drive is stabilized.

Finally, it is envisaged that the elements for connecting the spacer to the plates consist of protruding sections of material which pass through openings in the plates. In addition to handling fasteners or mounting elements can be eliminated and the mounting device is in turn simplified.

Fig. 1

einen Treibstangenantrieb in einer Seitenansicht,

Fig. 2

einen Treibstangenantrieb nach Fig. 1 in einer Draufsicht, ohne Stulpschiene und Treibstange

Fig. 3

den Treibstangenantrieb nach Fig. 2 in der zweiten Seitenansicht,

Fig. 4

den Treibstangenantrieb in einem Längsschnitt entlang der Linie IV-IV in Fig. 2,

Fig. 5

den Treibstangenantrieb nach den Figuren 2 und 3 in einer Ansicht von unten,

Fig. 6

den Treibstangenantrieb in einer Längsseitenansicht,

Fig. 7

den Treibstangenantrieb in einem Querschnitt entlang der Linie VII-VII in Fig. 3,

Fig. 8

eine dreidimensionale Darstellung des Treibstangenantriebs ohne Stulpschiene und Treibstange,

Fig. 9

eine vergrößerte Detaildarstellung des Distanzstücks,

Fig. 10

eine Längsschnittdarstellung des Distanzstücks nach Fig. 9,

Fig. 11

eine Längsseitenansicht des Distanzstücks,

Fig. 12

eine dreidimensionale Darstellung des Distanzstücks,

Fig. 13

ein weiteres Ausführungsbeispiels eines Treibstangenantriebs,

Fig. 14

eine Draufsicht auf den Treibstangenantrieb nach Fig. 13,

Fig. 15

einen Längsschnitt entlang der Linie XV-XV in Fig. 14,

Fig. 16

eine dreidimensionale Darstellung des Treibstangenantriebs nach Fig. 13 und

Fig. 17

eine Längsseitenansicht des Treibstangenantriebs nach Fig. 13,

Fig. 18

eine Einzelteildarstellung der Platte in einer Seitenansicht,

Fig. 19

die Platte nach Fig. 18 in einer Draufsicht und

Fig. 20

die Platte des ersten Ausführungsbeispiels in einer dreidimensionalen Darstellung.

Further advantageous developments emerge from the figures. It shows

Fig. 1

a drive rod drive in a side view,

Fig. 2

a drive rod drive to Fig. 1 in a plan view, without faceplate and drive rod

Fig. 3

the drive rod drive after Fig. 2 in the second side view,

Fig. 4

the drive rod drive in a longitudinal section along the line IV-IV in Fig. 2 .

Fig. 5

the drive rod drive to the FIGS. 2 and 3 in a view from below,

Fig. 6

the drive rod drive in a longitudinal side view,

Fig. 7

the drive rod drive in a cross section along the line VII-VII in Fig. 3 .

Fig. 8

a three-dimensional representation of the drive rod drive without faceplate and drive rod,

Fig. 9

an enlarged detail of the spacer,

Fig. 10

a longitudinal sectional view of the spacer after Fig. 9 .

Fig. 11

a longitudinal side view of the spacer,

Fig. 12

a three-dimensional representation of the spacer,

Fig. 13

another embodiment of a drive rod drive,

Fig. 14

a plan view of the drive rod drive to Fig. 13 .

Fig. 15

a longitudinal section along the line XV-XV in Fig. 14 .

Fig. 16

a three-dimensional representation of the drive rod drive after Fig. 13 and

Fig. 17

a longitudinal side view of the drive rod drive to Fig. 13 .

Fig. 18

a single part representation of the plate in a side view,

Fig. 19

the plate after Fig. 18 in a plan view and

Fig. 20

the plate of the first embodiment in a three-dimensional representation.

At the in Fig. 1 shown drive rod drive 1 is the faceplate with 2 and the drive rod designated 3. The drive rod drive 1 has evidently the Fig. 1 to 8 a housing 4, which in turn consists of the housing halves 5,6, the pinion 7 and the spacer 8.

The housing 4 is on front projecting mounting lugs 9, which engage in corresponding recesses 10 of the faceplate 2, fixed thereto. For this purpose, the attachment lugs 9 are designed so that they slightly overhang the recesses 10 after insertion and can be plastically deformed by means of a riveting or tumbling process.

Evidently the FIGS. 2, 4 and 5 the spacer 8 is connected in the same way with the housing halves 5.6. The housing halves 5.6 are made of thin sheet metal plates, which are substantially flat, as based on the FIGS. 2 and 5 seen. The spacer 8 passes through these plates 5,6 in openings 11 provided for this purpose by means of the fastening lugs 12.

To ensure the drive of the gear 7, this is provided with a polygonal receptacle and rotatably mounted in the housing 5. The drive is usually done manually via a hand lever, not shown here, which is mounted inside the building on the wing and attached via two mounting screws. The fastening screws find their abutment in the threaded holes 13 which are provided in the spacer 8 and which extend parallel to the axis of rotation 14 of the gear 7.

The gear 7, the displaceable along the housing 4 drive rod 3 is drivingly connected via a driving bolt teeth in a known manner.

From the FIGS. 1 and 3 as well as the FIGS. 2 or 5 is still recognizable that the housing halves consist of identical plates 5,6. The plates 5,6 therefore have congruent outer contours and also the recesses, apertures and bends correspond to each other. The design of the essentially flat housing halves of plates 5, 6 permits the production of both housing halves by means of a stamped bending process, so that they can be produced very easily and inexpensively in large quantities. The plates 5, 6 are also constructed transversely symmetrical, ie they are concerning the lines VII-VII in Fig. 3 , which runs transversely to the longitudinal axis, designed in mirror image The transverse symmetry allows the unmistakable mounting of the housing 4 or use of the plates 5.6. In particular, when separating the plates 5.6 in an automated assembly of this required effort is reduced

Also, the spacer 8 consists of an angled sheet metal portion, the at least one along the axis of rotation 14 of the gear 7 extending web 15 (FIG. 4 and 5 ) associated with the plates 5, 6 for attachment. This shows in particular but also the Fig. 6 in which the essential T-shaped cross-section becomes clear. This T-shape allows easy production from the sheet metal section. A likewise conceivable U-shaped spacer 8 would be expensive to produce. From the FIGS. 9 to 11 and the Fig. 12 , in which the spacer 8 is visible in three-dimensional representation, the structure is clear. The web 15 forms a base from which protrude at the respective longitudinal end of the ears 16, 17. The ears 16, 17 are sections of material which have been placed vertically from the plane of the sheet metal section. The ears 16, 17 are provided at their free ends 18 with a broadening, so that the threaded holes 13 are surrounded with a sufficient portion of material. In the web 15, a slot opening 19 is provided, whose function will be described below. The web 15 is provided at its two longitudinal edges 20, 21 with the projecting fastening lugs 12. Further, an adjusting projection 22 is provided on the longitudinal edge 20 near the end, which for engagement in the recesses 23 (FIG. FIGS. 1, 3 . 8th ) and the positionally accurate alignment of the spacer 8 on the plate 5 or 6 is used

In conjunction with the Fig. 9 It is still clear that the spacer 8 as well as the plates 5, 6 is designed transversely symmetrical to the transverse axis 24. At the same time, however, the functional members, which can interact with the other components, namely the fastening lugs 12 and the ears 16, 17, are symmetrical with respect to the longitudinal axis 25. Accordingly, the spacer 8 with respect to its position on the plate 5 or 6 can be confused, without the function of the drive rod drive 1 would be affected thereby. When mounting the spacer 8 on the plate 5 or 6, it is therefore immaterial whether the longitudinal edge 20 or the longitudinal edge 21 rests against the plate 5. Thus, an automated feed of the spacers 8 can be substantially simplified.

From the Fig. 11 it is still clear that the spacer has the already mentioned T-shaped cross-section. The necessary technology for the production of the spacer technology is limited to a known stamping and bending technique, which allows an inexpensive, yet durable design. Characterized in that the longitudinal dimension of the spacer 8 approximately corresponds to the distance of the effective as fasteners threaded holes and receives both abutment in itself, eliminating the handling of a possibly additional second spacer or a fastener.

Since the two halves forming the housing halves 5, 6 are identical, they can be singulated and fed in a mounting device. The spacer 8 connects the plates 5.6 already, so that this otherwise provided by the prior art cuff rail 2 need not be present. This can therefore be attached at a later date to the, already completed assembly consisting of the plates 5,6, the pinion 7 and the spacer 8. As a result, the assembly can be divided essentially into two sub-steps. In a first partial step, the housing 4 is made of the two plates 5,6 and the gear 7 through the one spacer 8. In a second step, the thus finished housing 4 is then mounted on the face-plate 2 together with the drive rod 3.

As a result, the storage of the drive rod drives 1 is simplified because the housing 4 can be made in a large number and stored, while to be interpreted according to the dimensions of the respective windows or doors in different dimensions Stulpschienen 2 and 3 drive rods in smaller quantities.

From the Fig. 7 is still clear that the transverse web 15 is assigned to the gear 7 on the drive rod 3 and the face-plate 2 side facing and thereby from the gear 7 near the storage in the plates 5,6 in the already mentioned slot opening 19 is penetrated. The drive rod drive 1 can therefore be made more compact with increased load capacity. If you were the spacer 8 - seen from the drive rod 3 from - behind the gear 7, so for example in the FIG. 1 Direction center of the picture -, then the housing would be 4 in this direction to enlarge accordingly, which would also have a larger installation space on the wing result. The attachment of the two plates 5,6 would then take place exclusively in the edge region of the plates 5,6, so that the entire assembly would require in the further production of the drive rod drive 1 a special and careful handling.

Another advantage arises in connection with the FIGS. 13 to 17 , In the embodiment of the drive rod drive 1 shown here, the gear 7 acts only indirectly via an intermediate piece 30 with the drive rod 3 together. The drive rod drive 1, which is to be equipped with this housing 4, has a greater distance of the rotation axis 14 to the face-plate 2. For this purpose, the gear 7 is associated with the intermediate piece 30, which on the one hand via the toothing 31 is drivingly connected to the gear 7, on the other hand can engage via the pins 32 in corresponding recesses of the drive rod 3, not shown here.

In the housing 4 is formed on the one hand by the plates 5, 6 and on the other hand by the spacer 8, a U-shaped space ( Fig. 17 ), which serves the drive rod 3 and the intermediate piece 30 as a guide. In itself, therefore, the intermediate piece 30 requires no additional guidance in the housing 4, since it is encompassed on three sides by the housing 4 and is permanently mounted captive in the housing 6 via the finally to be fastened face-plate. In the illustrated embodiment, however, the intermediate piece 30 is fastened and guided on laterally projecting pins 33 on the housing 4. This embodiment allows the intermediate piece 30 also to be added to the assembly consisting of the gear 7, the two plates 5, 6 and the spacer 8.

The first-mentioned embodiment thus makes it possible for the device for mounting the drive rod drives 1 after Fig. 1 in which the gear 7 interacts directly with the drive rod 3 and the device for mounting the drive rod drives 1 with the intermediate piece 30, designed to be identical. The corresponding recordings in the device are by the in these two cases as it were used spacers 8 and gears 7 to vote only on the different dimensions of the plates 5.6. Starting from the axis 14 of the gear 7, however, identical mounting points of the plates 5, 6 with the spacer 8 are obtained for both embodiments. The mounting device is thereby further utilized in terms of time, which in turn reduces the costs

From the Fig. 15 is still apparent that the gear 7 is formed as a molded plastic with disk body and the above the disk plane projecting bearing pin 34 are formed from the plastic. As a result, the gear 7 can be produced as a simple stamped body and optimally configure the bearing pin. By a suitable choice of material, the wear behavior of the gear 7 can be positively influenced in the storage and realize a useful workpiece shape in a relatively simple manner.

The storage of the gear 7 in the plate 5 or 6 is formed by a funnel-shaped inwardly drawn opening 35, as shown in the Fig. 17 and 18 as well as the FIGS. 8 and 16 is recognizable. Through the funnel-shaped opening 35, a collar 36 is formed, which forms a larger bearing surface for the bearing pin 34 of the gear 7 in the housing 4. As a result, the wall thickness of the plates 5, 6 can be reduced without the bearing surface of the gear 7 being reduced. Due to the smaller plate thickness while also the production of the funnel-shaped opening 35 and the collar 36 is facilitated. The bearing pin 34 of the gear 7 act due to the configuration in the loading direction not with the rough punching edge of the opening 35 together, but with the in itself unprocessed surface of the plate 5 and 6, so that the expected wear is further reduced.

From the enlarged individual parts of the FIGS. 18, 19 and 20 the structure of the opening 18 is clearer. The collar 36 forms on its inside the bearing shell 37 in which the coaxial with the axis of rotation 14 extending bearing pin 34 is seated. The opening 35 is further provided with a portion 38 which is not pulled inwards like the collar 36. Rather, this section 38 is aligned in the plane of the plate 5, 6 and has two projections 39 projecting radially to the axis of rotation 14. The lugs 39 are in the mounted state on the end faces 40 of the bearing pin 34 ( Fig. 8 and 13 ). At the end faces 40, but at least on one of the end face, there is an axial extension 41, which is in the assembled state of the gear 7 between the lugs 39. The extension 41 causes a defined Relative orientation of the gear 7 to the housing 4 and its plates 5 or 6. In the first actuation of the drive rod drive 1, the extension 41 is sheared off at the lugs 39.

The plates 5,6 for the drive rod drive 1 according to the first embodiment ( Fig. 20 ) have consecutive bends 42 ( Fig. 2, 5 and 8th In the illustrated embodiment, the bends 43 are based on the spacer 8 from. It would of course be conceivable to attach to the plates 5,6 each one in the direction of the other plate 5,6 projecting bend 43, wherein the bends 43 of the plates 5 and 6 are each point-symmetrically opposite to the axis of rotation 14 of the gear 7. Each of the bends would then rest directly on the other plate 5 and 6 respectively. As a result, however, the symmetry of the plates 5, 6 would no longer be guaranteed, so that this would affect the design of the mounting device. Longer projecting bends 43 would be at the risk of being deformed during transport and further processing, in particular of the surfaces.

By the bends 43, an additional support of the plates 5,6 relative to the spacer 8 and thus also achieved against each other. The support preferably takes place in the region of the fastening elements, that is to say the threaded bores 13 of the hand lever and the widening of the ends 18, so that the rear-side housing edge of the drive rod drive 1 is stabilized. The fastening screws of the hand lever penetrate the plates 5, 6 at holes 44 provided for this purpose. If the fastening screws are tightened too tight, the spacer 8 could deform. By the bends 43 it is achieved that the spacer 8 can be supported on the plates 5,6 and thus also in a fitting receiving groove of the wing

LIST OF REFERENCE NUMBERS

1

Driving rod drive

2

faceplate

3

driving rod

4

casing

5

housing half

6

housing half

7

gear

8th

spacer

9

mounting boss

10

recess

11

breakthrough

12

mounting boss

13

threaded hole

14

axis of rotation

15

web

16

ear

17

ear

18

end up

19

Long hole

20

longitudinal edge

21

longitudinal edge

22

adjustment projection

23

recesses

24

transverse axis

25

longitudinal axis

30

connecting piece

31

Perforation

32

spigot

33

spigot

34

pivot

35

opening

36

collar

37

bearing shell

38

section

39

approaches

40

face

41

extension

42

angulation

43

angling

44

drilling

Claims (10)

1. Driving rod drive (1) for a window or a door, in which a gearwheel (7) is rotatably mounted in a housing (4), which gearwheel (7) is for example driven manually by means of a hand lever and is assigned a driving rod (3) which is moveable along the housing (4) and which interacts indirectly or directly with the toothing of the gearwheel (7), with abutments (13) for fastening elements of the hand lever being provided in the housing (4), which abutments (13) run parallel to the rotational axis (14) of the gearwheel (7), and with the housing (4) being composed of two housing halves (5, 6) in which the bearing arrangement of the gearwheel (7) is arranged, and with a spacer (8) being attached between the housing halves (5, 6), which spacer (8) contains the abutments for the fastening elements of the hand lever and contains fastening means for the connection to the housing halves (5, 6),
   characterized
   in that the housing halves are composed of identical plates (5, 6),
   in that the spacer (8) is composed of a bent sheet metal section which is situated between said housing halves and has at least one web (15) which runs along the rotational axis (14) of the gearwheel (7) and is assigned to the plates (5, 6) for the purpose of fastening, and
   in that the longitudinal dimension of the spacer (8) corresponds approximately to the spacing of the fastening elements and encompasses the two abutments (13) within it.
2. Driving rod drive according to Claim 1,
   characterized
   in that the transversely-running web (15) is assigned to the gearwheel (7) at the side facing towards the driving rod (3), and is penetrated here by the gearwheel (7) close to its bearing arrangement in a slotted opening (19).
3. Driving rod drive according to Claim 1 or 2,
   characterized
   in that the gearwheel (7) interacts only indirectly via an intermediate piece (30) with the driving rod (3), and the intermediate piece (30) is guided by the housing halves or the plates (5, 6) and the spacer (8).
4. Driving rod drive according to one of Claims 1 to 3,
   characterized
   in that the bearing arrangement of the gearwheel (7) in the plate (5, 6) is formed by a funnel-shaped opening (35) which is drawn inward.
5. Driving rod drive according to one of Claims 1 to 4,
   characterized
   in that the spacer (8) has a substantially T-shaped cross section.
6. Driving rod drive according to one of Claims 1 to 5,
   characterized
   in that the plates (5, 6) are designed so as to be symmetrical transversely with respect to the longitudinal axis.
7. Driving rod drive according to one of Claims 1 to 6,
   characterized
   in that the gearwheel (7) is designed as a disc body which is extrusion-coated with plastic, and the bearing pins (34) which project beyond the disc plane are formed from the plastic.
8. Driving rod drive according to one of Claims 1 to 7,
   characterized
   in that the plates (5, 6) have bends (43) which point towards one another and which are supported on the spacer (8).
9. Driving rod drive according to one of Claims 1 to 8,
   characterized
   in that the spacer (8) is designed so as to be transversely symmetrical.
10. Driving rod drive according to one of Claims 1 to 9,
    characterized
    in that the fastening elements for connecting the spacer (8) to the plates (5, 6) are composed of projecting material sections (12) which extend through the openings (11) in the plates (5, 6).

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