CABLE DRUM FOR A CABLE WINCH AND METHOD FOR PRODUCTION THEREOF

Abstract

The present invention relates to a cable drum for a cable winch of a cable drive, having a drum shell and two flanged wheels which adjoin the drum shell at the ends, wherein the drum shell and/or the flanged wheels are produced from fiber-reinforced composite material, wherein the drum shell and/or the flanged wheels have a multi-shell structure having at least two walls made of fiber-reinforced composite material, which walls are spaced apart from each other and connected to each other by a foam core.

Claims

1. A hoist drum for a hoist winch of a rope drive comprising: a drum jacket; and two guard plates adjacent to the drum jacket at end sides; wherein the drum jacket and/or the guard plates is/are comprise a fiber reinforced composite material, and wherein the drum jacket and/or the guard plates has/have a multi-shell structure having at least two walls of a fiber reinforced composite material that are spaced apart from one another and connected to one another by a foam core.

2. The hoist drum of claim 1, wherein the at least two walls of fiber reinforced composite material each have a wall thickness that is less than 50% of the wall thickness of the foam core.

3. The hoist drum of claim 1, wherein the at least two walls of fiber reinforced composite material each have a wall thickness that is less than 25% of the wall thickness of the foam core.

4. The hoist drum of claim 1, wherein the foam core is foamed as a full carcass from a closed cell hard foam, wherein the closed cell hard foam comprises at least one of polyurethane foam, polystyrene foam, or polyvinylchloride foam, and completely fills the intermediate space between the at least two walls.

5. The hoist drum of claim 1, wherein the drum jacket and/or the guard plates is/are reinforced by at least one stiffening rib comprising the fiber reinforced composite material and projecting toward the inner drum side from an inner jacket surface of a jacket wall of the drum jacket of the fiber reinforced composite material and/or projecting from a plate wall of the guard plate in the axial direction of a longitudinal axis of the drum jacket.

6. The hoist drum of claim 5, wherein the at least one stiffening rib extends helically along an inner jacket space of the jacket wall and/or about the longitudinal axis of the drum jacket to stiffen the drum jacket.

7. The hoist drum of claim 6, wherein the at least one stiffening rib extends along an end face of the plate wall spirally or concentrically about the longitudinal axis of the drum jacket to stiffen the drum jacket.

8. The hoist drum of claim 5, wherein the at least one stiffening rib extends along an end face of the plate wall spirally or concentrically about the longitudinal axis of the drum jacket to stiffen the drum jacket.

9. The hoist drum of claim 1, further comprising at least one stiffening rib extending between two jacket walls of the drum jacket and/or between two plate walls of a guard plate, wherein the at least one stiffening rib connects the two jacket walls or the two plate walls to one another.

10. The hoist drum of claim 9, wherein the two jacket walls and/or the at least one stiffening rib are/is foamed into the foam core between the jacket walls and/or between the plate walls.

11. The hoist drum of claim 1, further comprising a plurality of axial stiffening ribs at the drum jacket extending at least approximately in parallel with a longitudinal axis of the drum jacket, and/or a plurality of concentric stiffening ribs extending in mutually spaced apart planes perpendicular to the longitudinal axis of the drum jacket.

12. The hoist drum of claim 1, further comprising at least one stiffening rib that has a rib height from 50% to 250% of the wall thickness of the wall of the fiber reinforced composite material.

13. The hoist drum of claim 1, further comprising at least one stiffening rib that has a rib height from 75% to 125% of the wall thickness of the wall of the fiber reinforced composite material.

14. The hoist drum of claim 1, wherein the drum jacket comprises at least one jacket wall of the fiber reinforced composite material having a multilayer fiber reinforcement comprising different fiber reinforcement layers.

15. The hoist drum of claim 14, wherein the multilayer fiber reinforcement has different main directions in the different fiber reinforcement layers.

16. The hoist drum of claim 1, wherein the drum jacket has at least one jacket wall in which a fiber reinforcement of the fiber reinforced composite material is aligned such that a main fiber direction extends helically around the longitudinal axis of the drum jacket in multiple layers in cross-coating with oppositely running helical pitches.

17. The hoist drum of claim 1, wherein the drum jacket has a grooving directly in the fiber reinforced composite material of the drum jacket.

18. The hoist drum of claim 1, wherein the drum jacket comprises a jacketing that has a grooving, wherein the jacketing is vulcanized onto the fiber reinforced composite material.

19. The hoist drum of claim 1, wherein the guard plates comprise a jacketing applied in a vulcanized fashion onto a plate wall of the fiber reinforced composite material.

20. The hoist drum of claim 1, wherein the guard plates are molded integrally in one piece with material homogeneity to the drum jacket, wherein a fiber reinforcement extends continuously beyond a transition region between the drum jacket and the guard plate.

21. The hoist drum of claim 1, wherein the guard plates are formed separately from the drum jacket and are subsequently connected to the drum jacket.

22. The hoist drum of claim 21, wherein the guard plates are set at end faces of the drum jacket and are tensioned toward the end faces of the drum jacket by pull rods or tie rods.

23. The hoist drum of claim 22, wherein the tie rods extend through the foam core of the drum jacket and/or the tie rods are anchored in a material jacket of fiber reinforced composite material.

24. The hoist drum of claim 1, wherein the guard plates are seated in a sleeve-like or cap-like manner on the drum jacket.

25. A hoist winch having a hoist drum that is configured in accordance with claim 1.

26. A method of producing a hoist drum that has a drum jacket and two guard plates adjacent to the drum jacket at the end sides, comprising: producing the drum jacket and/or the guard plates at least partially from a fiber reinforced composite material, wherein at least one wall of the drum jacket and/or of the guard plates is built up by winding a fiber reinforcement material; saturating the fiber reinforcement material before or after the winding with a matrix material; and hardening the matrix material after the winding.

27. The method of claim 26, further comprising forming two mutually spaced apart walls from fiber reinforced composite material; and foaming an intermediate space disposed therebetween the two mutually spaced apart walls.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The invention will be explained in more detail in the following with respect to preferred embodiments and to associated drawings. There are shown in the drawings:

[0041] FIG. 1: a longitudinal section through a hoist drum in accordance with an advantageous embodiment of the invention in which the drum jacket and the guard plates each have a double-shell structure having a foam core and fiber composite material walls and the separately formed guard plates are connected to the drum jacket by pull rods;

[0042] FIG. 2: a longitudinal section through a hoist drum similar to FIG. 1 in accordance with a further advantageous embodiment of the invention in which the drum jacket has in in a similar manner to FIG. 1 a two-shell structure having a foam core and the guard plates likewise have a two-shell structure, but with stiffening ribs;

[0043] FIG. 3: a longitudinal section through a hoist drum in accordance with a further advantageous embodiment of the invention in which the drum jacket is formed in a two-shell manner with spiral stiffening ribs between the two jacket walls and the guard plates are pushed onto the drum jacket in the manner of a sleeve and are fixed there;

[0044] FIG. 4: a longitudinal section through a hoist drum in accordance with a further advantageous embodiment of the invention in which the drum jacket is formed with one wall and has spiral stiffening ribs at its inner material side;

[0045] FIG. 5: a longitudinal section through a hoist drum in accordance with a further embodiment of the invention, with the drum jacket having a plurality of longitudinal ribs distributed over the periphery at its inner jacket side;

[0046] FIG. 6: a longitudinal section through a further hoist drum in which the guard plates are, in a similar manner to FIGS. 3 to 5, pushed onto the drum jacket and are secured by tensile bolts there, with a surface coating or jacketing that forms a grooving in the region of the drum jacket being provided on the outer jacket side of the drum jacket and the inner sides of the guard plates;

[0047] FIG. 7: a longitudinal section through a hoist drum similar to FIG. 6, with the guard plates being pushed onto the drum jacket and being connected or fixed with material continuity there;

[0048] FIG. 8: a longitudinal section through a hoist drum similar to FIG. 7, with the separately formed guard plates being tensioned at the end faces toward the drum jacket wall by pull rods;

[0049] FIG. 9: a hoist drum similar to FIG. 7, with the separately formed guard plates being tautened against the end faces of the drum jacket by means of pull rods that are anchored in the drum jacket:

[0050] FIG. 10: a longitudinal section through a hoist drum similar to FIGS. 8 and 9, with the guard plates being connected to the drum jacket integrally in one piece and with material homogeneity; and

[0051] FIG. 11: a longitudinal section through a hoist drum similar to FIG. 10, with the rope grooving at the outer jacket surface being directly introduced in the fiber reinforced composite material of the drum jacket wall.

DETAILED DESCRIPTION

[0052] The hoist drums 1 shown in the Figures respectively comprise a roughly speaking cylindrical drum jacket 2 to whose axial ends a respective guard plate 3 is connected. Said guard plates 3 extend roughly speaking perpendicular to the longitudinal drum axis L and project radially outwardly from the drum jacket surface so that the guard plates 3 have a considerably greater diameter than the drum jacket 2.

[0053] The hoist drum 1 shown can in this respect in particular be used in the hoisting gear of a crane such as a revolving tower crane or a mobile telescopic crane or a boom mast adjustment gear, but also in other hoist winches.

[0054] Said guard plates 3 can generally be connected to the drum jacket body 2 in different manners, as will still be explained.

[0055] As FIG. 1 shows, the drum jacket 2 can have a multi-shell structure and have two substantially cylindrical jacket walls 4 and 5, preferably arranged coaxially, that are each produced from a fiber reinforced composite material, for example GRP or CFRP.

[0056] A foam core 6 that can likewise be at least contoured approximately cylindrically is received in a sandwich-like manner between the two jacket walls 4 and 5 of the drum jacket 2. The foam core 6 substantially completely fills the intermediate space between the two jacket walls 4 and 5 and is in areal contact with the two walls. The two jacket walls 4 and 5 of fiber reinforced composite material can in particular form top layers that cover and protect the foam core 6 at the inner and outer sides.

[0057] The foam core 6 holds the two jacket walls 4 and 5 apart and connects them to one another, with the foam core 6 being able to be connected to the two jacket walls 4 and 5 aeally, in particular over the full area, with force transmission and/or material continuity.

[0058] The foam core 6 can in particular be produced by foaming the intermediate space between the two jacket walls 4 and 5 so that the foam core 6 lies under pressure against the material walls 4 and 5 and enters into a connection therewith.

[0059] As FIG. 1 shows, the guard plates 3 can also have a multi-shell, in particular double-shell structure, and have two at least approximately radially extending plane walls 7 and 8 that are spaced apart from one another and that are produced form fiber reinforced composite material. A foam core 9 that keeps the two plate walls 7 and 8 at a distance and connects them to one another can likewise be introduced between these plate walls 7 and 8, with said foam core 9 advantageously being able to substantially completely fill the hollow space between the two plate walls 7 and 8. The foam core 9 of the guard plates 3 can be produced or formed analogously to the foam core 6 of the drum jacket 2.

[0060] As FIG. 1 further shows, the walls 4 and 5 or 7 and 8 of the drum jacket 2 or of the guard plates 3 of fiber reinforced composite material can have a wall thickness that is considerably smaller than the wall thickness of the foam core 6 or 9, for example less than 50% or less than 25% or also less than 10% of the wall thickness of the foam core.

[0061] As FIG. 1 further shows, the guard plates 3 can be produced separately from the drum jacket 2 and can be subsequently fastened to the drum jacket 2. The guard plates 3 can in particular be set against and fastened to the end faces of the drum jacket 2, with, as FIG. 1 shows, pull rods 10 being able to be used that can extend over the total length of the drum jacket 2 and also through the guard plates 3. The guard plates 3 can be axially tensioned against the drum jacket 2 by tensioning means at the end of the pull rods 10, for example in the form of nuts 11 screwed onto them.

[0062] Said pull rods 10 can advantageously extend through the drum jacket 2, in particular penetrate its form core 6.

[0063] As FIG. 2 shows, the drum jacket 2, on the one hand, and the guard plates 3, on the other hand, can have different designs or a different structure. Whereas in accordance with FIG. 2 the drum jacket 2 substantially has the two-shell structure with a foam core in accordance with FIG. 1, the guard plates 3 can be stiffened by stiffening ribs 12.

[0064] As FIG. 2 shows, the guard plates 3 can here in turn have a multi-shell structure having two plate walls 7 and 8 extending approximately radially and spaced apart from one another. A plurality of spiral or concentric or radial ribs 12 are provided between said plate walls 7 and 8 and connect the two approximately radially extending plate walls 7 and 8 to one another. Said stiffening ribs 12 project from the plate wall 7 that bounds the winding space above the drum jacket 2 outwardly in the axial direction until they reach the second plate wall 8.

[0065] As FIG. 2 shows, the stiffening ribs 12 can connect the two plate walls 7 and 8 to one another without a foam core. It would, however, alternatively also be possible also to foam the remaining intermediate space or to fill it with a foam core 6 in addition to the stiffening ribs 12.

[0066] As FIG. 3 shows, the drum jacket 2 of the hoist drum 1 can also have a multi-shell structure with one or more stiffening ribs between material walls 4 and 5. In the embodiment shown in FIG. 3, a spiral or helical stiffening rib 13 that extends helically around the drum axis L or extends along the inner jacket surface and the outer jacket surface of the two jacket walls 4 and 5 is provided between the material walls 4 and 5 of the drum jacket 2. The stiffening rib 13 here advantageously extends substantially over the total length of the drum jacket 2.

[0067] As FIG. 3 shows, only the at least one stiffening rib 13 can also be provided between the two jacket walls 4 and 4 in the drum jacket 2. Alternatively to this, the stiffening rib 13 can, however, also be combined with a foam core 6 that fills the remaining intermediate spaces between the two jacket walls 4 and 5.

[0068] As FIG. 5 shows, the drum jacket 2 can, however, also be stiffened by stiffening ribs of a different contouring, in particular with a plurality of axial stiffening ribs 13 that can extend substantially in parallel with the longitudinal axis L of the drum jacket 2 at an inner side of the jacket wall 4. In this respect, FIG. 5 shows a single-shell structure of the drum jacket 2 that in this case only has a material wall 4 of fiber reinforced composite material. The axial stiffening ribs 13 shown in FIG. 5 can nevertheless also be used in a multi-shell structure of the drum jacket 2 and can then extend between two mutually spaced apart jacket walls 4 and 5 and can connect them to one another.

[0069] Stiffening ribs are not shown separately that can extend coaxially, that is substantially in the peripheral direction of the drum jacket 2, and that can advantageously be arranged distributed in the direction of the longitudinal axis L.

[0070] As FIG. 4 further shows, a single-shell drum jacket 2 can also be stiffened by a helical stiffening rib 13 or by a plurality of such helical stiffening ribs 13, with the at least one stiffening rib 13 being able to extend at an inner jacket side of the jacket wall 4 and being able to project therefrom inwardly toward the drum center, cf. FIG. 4.

[0071] As FIGS. 3 to 5 show, the separately formed guard plates 3 cannot only be tensioned axially toward the end faces of the drum jacket 2, but can also be pushed onto the periphery of the drum jacket 2 with an exact fir or can be seated on the outer periphery of the drum jacket 2 in the manner of a sleeve or cap.

[0072] The guard plates 3 can here have an at least approximately radially extending plate wall 7 and can have an approximately cylindrical sleeve section 14 that can sit on the drum jacket 2. The plate wall 7 can be connected to said sleeve section 14 by a plurality of stiffening ribs 12 that can, for example, extend in an axial direction and can be arranged approximately radially. The plate wall 7 and the sleeve section 14 are advantageously formed integrally in one piece with the stiffening ribs 12 and are each produced from a fiber reinforced composite material.

[0073] The guard plates 3 pushed onto the drum jacket 2 can be secured or fastened in different manners there. For example, said sleeve section 14 can be fixed for example adhered firmly, to the drum jacket 2 with material continuity or force transmission.

[0074] Alternatively or additionally to a connection with material continuity or force transmission, the pushed-on guard plates 3 at the drum jacket 2 can, however, also be secured or fixed with shape matching, in particular by one or more tensile bolts 15, as FIG. 6 shows, for example. Said tensile bolts 15 can extend through mutually aligned bores that can be formed in the sleeve section 14 of the guard plates 3 and the drum jacket 2.

[0075] As FIG. 6 further shows, the drum jacket 2 can be provided with a grooving 16 at the outer peripheral side to guide the rope running on. The grooving 16 can here be formed by a top layer or jacketing 17 that can be applied to the outer peripheral side of the drum jacket 2, in particular to the previously described jacket wall 4 of fiber reinforced composite material. The jacketing 17 forming the grooving 16 can here be produced from plastic, can be vulcanized on, for example, to achieve a certain damping and to reduce the wear of the rope to be wound on.

[0076] Alternatively or additionally, the guard plates 3 can also be provided with such a jacketing 17 as a top layer at least at the inner surface side, cf. FIG. 6.

[0077] While FIG. 6 in turn shows the bolting of the guard plates 3 to the drum jacket 2, the guard plates 3 can also be fastened to the drum jacket 2 with material continuity or with force transmission, as FIG. 7 shows. The sleeve section 14 of the respective guard plates 3 can, for example, be adhered to the drum jacket 2.

[0078] As FIG. 8 illustrates, the jacketing 17 or the groove 16 can also be combined with guard plates 3 that are tensioned or placed at the end face against the drum jacket 2 and are secured and fastened by pull rods 10.

[0079] FIG. 9 shows a similar embodiment to FIG. 8, with tie rods 18 that are anchored in the drum jacket 2 and project therefrom at the end face to pass through the guard plates 3 being used to fasten the guard plates 3 instead of the continuous pull rods 10. The guard plates 3 can be drawn toward the end face of the drum jacket 2 via the tie rods 18 by tensioning means in the form of nuts 11 that can be screwed on, for example.

[0080] Said tie rods 18 are advantageously anchored in one of the jacket walls 4 or 5 of the drum jacket 2 of fiber reinforced composite material, with the tie rods 18 being able to be subsequently screwed thereto or also being able to be formed integrally in one piece thereat, for example in the form of projecting anchor bolts of fiber reinforced material or enveloped anchor bolts.

[0081] It must be clarified that such tie rods 18 can here also be used with drum jackets 2 formed with double shells or multiple shells, such as are shown, for example, in FIGS. 1 to 3, even if FIG. 9 only shows a single-shell drum jacket 2.

[0082] The same also applies to the grooving 16 or to the jacketing 17 and/or to the fastening of the guard plates 3 such as FIGS. 6 to 8 show. The jacketing 17 forming the grooving 16 can in particular also be used in the previously described embodiments in accordance with FIGS. 1 to 5. The jacketing 17 at the inner side of the guard plates 3 can also be used there.

[0083] As FIGS. 10 and 11 show, the guard plates 3 can also be connected to the drum jacket 2 or can be molded thereto integrally in one piece, in particular with material homogeneity. This applies independently of the single-shell or single-wall structure of the drum jacket 2 or of the guard plates 3 shown in FIGS. 10 and 11 so that the multi-shell embodiment options in accordance with the previously described FIGS. 1 to 3 can also be formed with guard plates 3 molded integrally in one piece.

[0084] While FIG. 10 shows a grooving 16 that is formed by a subsequent coating or jacketing 17 on the outer side of the drum jacket 2, said grooving 16 can also be introduced directly into the fiber reinforced composite material of the drum jacket wall 4, cf. FIG. 11.