EP2586895B1 - Connection device for connecting a heald frame with a shaft drive - Google Patents

Description

Such a connection device is also referred to as a shaft coupling.

Shaft couplings for heddle shafts are for example from the US 4,541,459 known. Such a shaft coupling serves to transmit the vertically reciprocating drive movement of a drive linkage to the vertical shaft to be moved. In addition, the shaft coupling should be solvable if necessary. The named US 4,541,459 For this purpose, a bearing shaft has a plurality of bearing brackets in the form of bolted-on, vertically downwardly extending pairs of tabs, between each of which a hollow pin is held. On the hollow pin sits an outer hexagonal ring which is rotatable on the hollow pin. While the hexagonal ring forms the shank-side coupling half, the shaft coupling has a drive-side coupling half in the form of a latch provided with a latch.

It turns out that the outer hexagonal ring is subject to wear during continued operation of the heald. In particular, it requires adequate lubrication. If this is not the case, a premature change of the relevant coupling half is due. For this purpose, usually the entire bearing carrier is exchanged together with hexagonal ring, which forms the coupling piece.

The DE 601 33 753 T2 discloses a similar shaft coupling with a hexagonal ring, which in turn is mounted on an axis held between two tabs. The ring is made of a self-lubricating plastic. In addition, a lubricating device may be provided in the form of a radially attached to the hexagonal ring lubricant.

In the event of wear, the entire coupling half, consisting of tongue, axle and hexagon ring, must be replaced.

Even with sufficient lubrication wear of the shaft-side coupling half is recorded. If there is insufficient lubrication, the wear increases.

From the JP 2003-253536 A St a joint assembly for connecting a drive linkage to a heald known. The hinge assembly comprises a forked two vertically downwardly extending tabs having part between which a transverse bore having a hinge piece is arranged. To this connects a drive linkage. The joint piece and the downwardly projecting tabs are penetrated by a bearing pin. However, there is no provision for a hex coupling piece for quick and easy connection of the shank to the shank linkage and for quick, comfortable cutting.

The DE 44 27 127 D1 deals with the joint between a heald and the shaft linkage. On the weave shaft is provided a fork leg whose two tabs have an aligned hole with retracted edge. On the retracted edge of the inner ring of a roller bearing sits non-rotatably. A screw-nut arrangement clamps the two legs against each other and thus secures the inner ring in place.

It is an object of the invention to facilitate the maintenance of the shaft coupling and to allow repair as needed.

This object is achieved with the connection device according to claim 1:
The connection device according to the invention has a bearing support to be connected to the heald, on which a bearing is held for the rotatable mounting of a coupling piece. The connection between the bearing carrier and the bearing is provided by a screw which is arranged between the bearing carrier and the bearing to hold the bearing to the bearing carrier. The screw can be solved if necessary. On the bearing support a Auswechselgasse is determined by the coupling piece and its bearings can be performed with dissolved screw out of the bearing carrier out and back into this. This is possible without having to carry out any other manipulations on the bearing carrier, such as bending, disassembling or the like. The Auswechselgasse example, when the bearing carrier is formed by two spaced tabs formed by two opposing flat surfaces of the tabs. Between the plane surfaces, the bearing can be bent with the coupling piece transversely to the bearing axis when the screw is loosened. The flat surfaces are free of obstacles, such as ribs, knobs, flanges or the like, which could prevent the extraction of the bearing and the coupling piece.

Thus, the coupling piece and the bearing can be required separated from the bearing carrier and, if necessary, also replaced. A separation of the bearing carrier from the hive is not required. This opens up the possibility firmly connect the bearing bracket to the shaft rod or side support without having to discard and replace the shaft rod or side support when the coupling or bearing is worn.

The screw connection forms a service interface for the coupling piece.

The bearing carrier comprises two mutually parallel spaced, tabs, between which the bearing is held with the coupling piece. Preferably, the tabs are substantially flat on their side facing the bearing, so that when the screw is loosened the coupling piece can be pulled out with the bearing between the tabs. Preferably, the tabs are also formed on its outside at least substantially flat. The gland, e.g. comprises at least one screw and at least one nut, preferably has both on the screw as well as on the mother each have a head which is sunk into the tab. The heads can be the same size or different sizes. They can be mirror images of each other or deviating shaped.

Preferably, the tab for receiving a head has a conical or stepped opening which receives the respective complementarily shaped respective head. At least one of the openings of the two tabs is circular in outline to allow rotation of the respective head. The opening formed in the other tab may also be circular or, if necessary, also out of round, for example, square or hexagonal and thus prevent rotation of the corresponding screw or nut head. The co-rotation of the screw or nut head can be alternatively Also by form-fitting means, for example. A corrugation, prevent or inhibit the abutting contact surfaces of tab and screw or nut head.

The screw connection preferably extends centrally through the bearing, which has a corresponding through hole for this purpose. Alternatively, the bearing itself may have a threaded bore into which screws are screwed, for example, from both sides, the heads are in turn sunk into the tabs. Other variants are possible. The bearing is preferably a ring with a cylindrical outer peripheral surface on which the coupling piece rotatably seated with little play. The coupling piece is preferably made of a self-lubricating material such as self-lubricating bronze.

The axial length of the bearing is preferably larger than that of the coupling piece. The tabs of the bearing carrier thus form the axial fixation of the coupling piece, which otherwise sits freely rotatably on the bearing.

In a modified embodiment, only a single tab is provided which carries the bearing. It may be provided on the side remote from the tab with a collar, such as a radial flange to secure the coupling axially.

The coupling piece is preferably an outer hexagonal, ie with six preferably equal sized planar faceted ring. This is preferably closed along its entire circumference, ie it has neither lubrication holes nor grease nipple. It can thus be brought in principle in six different rotational positions with the other coupling half in engagement. This allows a distribution of the occurring wear on the entire circumference of the coupling piece, which in turn helps to increase its service life.

• Figur 1 einen Webschaft mit Antriebgestänge und dazwischen angeordneten Schaftkupplungen in schematisierter Darstellung.
• Figur 2 eine Anschlusseinrichtung als Teil der Schaftkupplung in schematisierter Seitenansicht.
• Figur 3 die Anschlusseinrichtung nach Figur 2, in einer anderen Seitenansicht.
• Figur 4 die Anschlusseinrichtung nach Figur 2, in teilweise aufgeschnittener Darstellung im Zusammenhang mit einer zugeordneten gestängeseitigen Kupplungshälfte,
• Figur 5 die Anschlusseinrichtung nach Figur 2 und 3, in Querschnittsdarstellung,
• Fig.6 und 7 alternative Ausführungsformen der Anschlusseinrichtung.

Further details of advantageous embodiments of the invention are the subject of the drawing, the description or the claims. Show it:

• FIG. 1 a weaving shank with drive linkage and interposed shaft couplings in a schematic representation.
• FIG. 2 a connection device as part of the shaft coupling in a schematic side view.
• FIG. 3 the connection device after FIG. 2 , in another side view.
• FIG. 4 the connection device after FIG. 2 , in a partially cutaway view in connection with an associated rod-side coupling half,
• FIG. 5 the connection device after FIGS. 2 and 3 in cross-section,
• Fig.6 and 7 alternative embodiments of the connection device.

In FIG. 1 a heald 10 and an associated drive linkage 11 are illustrated schematically. The heald 10 is used for the storage of healds, which move the warp threads up and down in the weaving process. It consists of an upper shaft rod 12, a lower shaft rod 13 and side supports 14, 15. It also includes not shown elements, such as. Litzentragschienen and the already mentioned healds.

The drive linkage 11 serving for driving the heald frame 10 or, alternatively, also another driving device, such as linear drives or the like, is connected to the heald shaft 10 via shaft couplings 16, 17. The shaft couplings 16, 17 are, for example, attached to the lower shaft rod 13 or the side supports 14, 15. It is also possible to provide the outer shaft couplings 16, 17, for example on the side supports 14, 15 and additional shaft couplings on the shaft rod 13, when the drive linkage 11 has more than two outputs and thus requires more than two shaft couplings.

The shaft couplings 16, 17 and any other couplings are preferably formed substantially the same. The following description of the shaft coupling 16 is therefore exemplary for the other shaft couplings as well as for alternative designs.

The shaft coupling 16 is in FIG. 4 partially and separately illustrated. To her belongs a shaft-side coupling half 18, which in turn in the FIGS. 2 and 3 is separately illustrated. To the shaft-side coupling half 18 includes a bearing support 19, an apparent from Figure 5 bearing 20 and a coupling piece 21st

The bearing carrier 19 connects the bearing 20 with the heald 10. For this purpose, it has at least one, but preferably two, tabs 22, 23, which are preferably arranged at a distance parallel to each other. The at least one tab 22 or the two tabs 22, 23 are connected to the heald 10 via a suitable connecting means 25. This may for example be formed by a base plate 25a, which is to be screwed to the lower narrow side of the shaft rod. However, it is alternatively possible to connect the two tabs 22, 23 directly to the heald 10. For example, they may be welded, glued or riveted to the flat sides of the shaft rod 13. Alternatively, the tabs 22, 23 may be integral with the side supports 14 and / or 15, or welded, glued, riveted or otherwise joined thereto.

In particular, the bearing support 19, irrespective of how it is concretely formed, can be permanently connected to the side supports 14, 15 or the shaft rod 13 or other part of the heald 10.

The tabs 22, 23 are preferably flat plates with mutually parallel mutually facing inner sides, on which plane surfaces 22a, 23a are formed. Between these flat surfaces 22a, 23a, the bearing 20 and the coupling piece 21 are held. The flat surfaces 22a, 23a extend at least around the bearing 20 around with a diameter which is larger than the largest radial extent of the coupling piece 21. The flat surfaces 22a, 23a also extend at least to the edge of the bearing support 19, so the tabs 22, 23 so as to limit a Auswechselgasse 24. The exchange lane allows withdrawal of the bearing 20 and the coupling piece 21 between the tabs 22, 23 and a Wiederhineinschieben without the tabs 22, 23 would have to be deformed. If one slight elastic deformation can be allowed, the exchange gate 24 is dimensioned in any case so that a permanent deformation of the tabs is reliably omitted.

The bearing 20 may be formed, for example, by a circular bearing ring 26. This has a cylindrical outer peripheral surface 27 and a central opening with a preferably cylindrical inner peripheral surface 28. Preferably, the outer peripheral surface 27 and the inner peripheral surface 28 are formed without interruption. However, smaller apertures may be provided in the outer peripheral surface 27, e.g. in the form of bags or the like in which lubricant supplies, e.g. Fat, can be provided.

The bearing ring 26 also preferably has planar end faces 29, 30 which abut the inner sides of the tabs 22, 23.

The bearing ring 26 is held between the tabs 22, 23 preferably non-rotatable. For attachment is a screw 31, the structure of eg FIG. 5 is apparent. To the screw 31 include a screw 32 and a specially shaped nut 33. The screw 32 has a flat, circumferentially provided with a conical surface 34 head 35 having a flat outer side. The head 35 is received by a cone seat opening of the tab 23, which has a matching wall 34 to the conical surface 34. Thus, the flat outer surface of the head 35 is in a common plane with the outside of the tab 23rd

The screw 32 has a shaft 37 with external thread, which is screwed to the internal thread of the nut 33. The nut 33 also has a head 38 which has a flat outside. At its circumference is the Head 38 provided with a conical surface 39. The head 38 is seated in a cone seat opening of the tab 22, the wall 40 of which is conical and fits the conical surface 39.

The screw 32 and / or the nut 33 are provided with form-fitting elements for connecting a tool. For example, the screw 32 may have a cross-section hexagonal channel 41 into which fits a corresponding Allen key. If the screw 32 is tightened, the nut 33 may be frictionally held. It is also possible, instead of the conical surface 39, to have a non-circular surface, e.g. to provide a hexagonal surface (pyramidal frustum surface), wherein the wall 40 is then shaped accordingly. This results in a positive connection between the tab 22 and the nut 33, which prevents co-rotation of the nut 33 when tightening the screw 32. Alternatively, the conical surface 39 may have a radial corrugation, which cooperates with a corrugation of the wall 40 and prevents the co-rotation of the nut 33 when tightening the screw 32.

By the screw 31, by means of which the bearing 20 is clamped between the tabs 22, 23, the coupling piece 21 remains rotatable. It has a slightly smaller axial thickness than the bearing 20 and thus sits with little play between the tabs 22, 23rd

Preferably, the coupling piece 21 is a hexagonal ring on the outer circumference, for example of self-lubricating bronze or another metal or plastic, in particular self-lubricating plastic. The coupling piece 21 has a preferably cylindrical inner peripheral surface 42. This sits with a small clearance on the outer peripheral surface 27 of the bearing ring 26. The inner peripheral surface 42 is preferably formed without interruption. If necessary, it can be provided with recesses in which, for example, lubricant supplies, for example. Lubricating grease. The function of the shaft coupling 16 results from FIG. 4 , Complementary to the shaft-side coupling half 18, a drive-side coupling half 43 is provided. This has an insertable between the tabs 22, 23 to the coupling piece 21 complementarily formed mouth 44 to which a, for example, in the closed position biased latch 45 is assigned.

When merging the coupling halves 18, 43, the hexagonal outside coupling piece 21 is inserted into the mouth 44. In which of the six possible rotational positions, the coupling piece 21 is arbitrary. Also, the rotational position can be chosen so that already worn flanks are rotated in less loaded positions. Also, a rotational position can be selected in which a minimum vertical radial clearance is present.

As the wear progresses, play between the coupling piece 21 and the bearing 20 usually increases. These two elements can be exchanged. It is only the screw 31 to solve. The coupling piece 21 and the bearing 20 can be pulled out between the tabs 22, 23, without the tabs 22, 23 would have to be bent apart. Even if the tabs 22, 23 on its inside not quite flat, but, for example. Following the walls 36, 40 are slightly crimped inward, these flanges are so small that then possibly necessary slight Auswärtsflexion the tabs 22, 23 at Pulling out of the bearing 20 and the connecting element 21 in the region of the elastic deformation of the tabs 22, 23 remains. Also, such tabs 22, 23, the elevations that when pulling out of the bearing 20 and the coupling piece 21 by elastic deformation of the Tabs 22, 23 can be overcome, apply in the context of the invention as just. In addition, deviations from the plane on the inside of the tabs 22, 23 are irrelevant, which lie between the connecting means 25 and the coupling piece 21.

Modified embodiments of the coupling half 18 show the FIGS. 6 and 7 , As far as constructional or functional conformity with the above-described embodiment, the above description applies on the basis of the same reference numerals accordingly. In addition, the modifications explained below can readily be found in the embodiment as well FIG. 5 to be applied:
According to FIG. 6 For example, one or both conical surfaces 34, 39 may be replaced by stepped surfaces. FIG. 6 illustrates this with reference to the surface 34 ', which forms the stepped edge of the head 35. Similarly, the outer peripheral surface of the nut 33 may be formed, if desired. The respective wall of the associated bore in the tab 22 and / or 23 is in turn correspondingly shaped complementarily and thus forms a step seat opening. Again, the outer surfaces of the heads 35, 38 lie in a plane with the outside of the respective tabs 22, 23 and thus connect continuously to the outer surface.

FIG. 7 shows a modification of the previous embodiments. Here, the nut 33 is provided with its own channel 46 for attachment of a positive-locking tool, for example an Allen wrench. With regard to the design of the heads 35, 38, all variants described above can be used. Otherwise, the previous description applies accordingly.

A connection device for connecting a heald shaft 10 to a drive linkage 11 of a shaft drive comprises a shaft coupling 16 with a coupling half 18, which comprises a bearing 20 and a coupling piece 21. The bearing 20 and the coupling piece 21 are separable from a bearing support 19 which can be fixedly connected to the heald 10. The coupling piece 21 and the bearing 20 are preferably connected by means of a screw 31 with the bearing bracket 19 and thus separately exchangeable. For maintenance of the shaft coupling 16 thus the coupling piece 21 and the bearing 20 can be replaced in a simple manner. Complex lubricating devices, in particular lubricants and the like, can be dispensed with. This also simplifies the handling of the shaft coupling 16, in particular when assembling the coupling halves 18, 43. The rotational position of the usually external hexagonal coupling piece 21 is not important here. Misassembly, as they might occur when the coupling piece has lubricants that would have to have a certain orientation with assembled shaft coupling 16, can be avoided.

LIST OF REFERENCE NUMBERS

10

heald

11

drive linkage

12

upper shaft rod

13

lower shaft rod

14

left side support

15

right side support

16, 17

shaft clutch

18

shaft-side coupling half

19

bearing bracket

20

camp

21

coupling

22, 23

tabs

24

exchange lane

25

connecting means

25a

footplate

26

bearing ring

27

Outer circumferential surface of the bearing ring 26th

28

Inner trapping surface of the bearing ring 26th

29, 30

End faces of the bearing ring

31

screw

32

screw

33

mother

34

conical surface

35

head

36

wall

37

shaft

38

Head of the mother 33

39

Conical surface of the head 38

40

wall

41

channel

42

Inner circumferential surface

43

drive-side coupling half

44

mouth

45

bars

46

channel

Claims (11)

1. Connection device for connecting a heald frame (10) with a shaft drive,
   with a bearing support (19) connected to a heald frame (10) and supporting a bearing (20), wherein the bearing support (19) comprises two tabs (22, 23) held parallel to and spaced apart from each other, between which the bearing (20) is held, wherein the bearing support defines an interchange gate (24) which is formed by two mutually opposing planar surfaces (22a, 22b) of the tabs (22, 23),
   with a coupling piece (21) which is rotatably held on the bearing (20) and has a polygonal cross-section, wherein the bearing (20) is formed by a bearing ring (26) having a cylindrical outer circumferential face (7), a central opening and planar end faces (29, 30) which bear against the insides of the tabs (22, 23), wherein the bearing ring (26) has an axial length which is greater than the axial length of the coupling piece (21), and
   with a screw connection (31) which is arranged between the bearing support (19) and the bearing (20) for holding the bearing (20) at the bearing support (19), wherein the tabs (22, 23) are formed flat on their side facing the bearing (20) so that when the screw connection (31) is released, the coupling piece (21) with the bearing (20) can be extracted between the tabs (22, 23).
2. Connection device according to claim 1, characterised in that the tabs (22, 23) are formed flat on the side facing away from the bearing (20).
3. Connection device according to claim 1 or 2, characterised in that the screw connection (31) comprises at least one screw (32) which terminates flush with the bearing support (22).
4. Connection device according to any of the preceding claims, characterised in that the screw connection (31) comprises at least one nut (33) which terminates flush with the bearing support (19).
5. Connection device according to any of the preceding claims, characterised in that the bearing support (19) has at least one tapered seat opening or at least one stepped seat opening to receive the screw connection (31).
6. Connection device according to claim 5, characterised in that the screw connection (31) comprises at least one head (35, 38) complementary to the tapered seat opening or the stepped seat opening.
7. Connection device according to any of the preceding claims, characterised in that the bearing (20) is a plain bearing.
8. Connection device according to any of the preceding claims, characterised in that the coupling piece (21) is formed closed without interruption along its entire periphery.
9. Connection device according to any of the preceding claims, characterised in that the coupling piece (21) is made from a self-lubricating material.
10. Connection device according to claim 9, characterised in that the central passage comprises a cylinder wall (42).
11. Connection device according to claim 10, characterised in that the cylinder wall (42) is configured to receive the ring (26).

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