CABLE DRUM FOR A CABLE WINCH, AND CABLE DRIVE HAVING SUCH A CABLE DRUM

Abstract

The invention relates to a cable drum for a cable winch of a cable drive, having a drum body and two guard plates which surround the drum body on the face sides and delimit a winding space therebetween, wherein at least one of the guard plates has at least one inner wall part which is adjustable axially in the direction of the drum longitudinal axis such that the distance between the guard plates is adjustable.

Claims

1. A cable drum for a cable winch of a cable drive comprising: a drum body having face sides; and two guard plates surrounding the drum body on the face sides, wherein the two guard plates delimit a winding space therebetween, wherein at least one of the guard plates has at least one inner wall part axially adjustable in the direction of a drum longitudinal axis such that the distance between the guard plates is adjustable.

2. The cable drum of claim 1, wherein the adjustable inner wall part comprises an adjustment ring mounted so as to be axially adjustable in a longitudinal direction of the drum relative to a fixed guard plate part and/or a drum part.

3. The cable drum of claim 2, wherein the adjustment ring is axially displaceably mounted and elastically pretensioned inwardly towards the winding space by a pretensioning device.

4. The cable drum of claim 3, wherein the pretensioning device has at least one spring device between the axially displaceable inner wall part and the fixed guard plate part.

5. The cable drum of claim 4, further comprising at least one path adjustment path limiter for limiting elastic displaceability of the inner wall part.

6. The cable drum of claim 5, wherein the adjustment path limiter is adjustable so a length of the axial travel of the inner wall part and/or an end position of the axial displaceability are adjustable.

7. The cable drum of claim 6, wherein the adjustment path limiter has at least one screw bolt which predetermines different end positions in different screw positions.

8. The cable drum of claim 1, wherein the adjustable inner wall part has a plurality of adjustment rings of different ring diameters, wherein the adjustment rings comprise cable contact surfaces for different winding positions.

9. The cable drum of claim 8, wherein the plurality of adjustment rings are seated within one another and are screwable relative to one another by a screw thread formed in a parting line formed between the adjustment rings and are axially adjustable.

10. The cable drum of claim 9, further comprising a clamping device for clamping and/or pretensioning the adjustment rings relative to one another, wherein the clamping device comprises the screw thread) between the adjustment rings and/or between an adjustment ring and the fixed guard plate part.

11. The cable drum of claim 1, further comprising an innermost and/or smallest adjustment ring screwable relative to a fixed guard plate part by a screw thread formed in a parting line between the adjustment ring and the fixed guard plate part, and is axially adjustable.

12. The cable drum of claim 1, wherein the adjustable inner wall portion comprises a plurality of push elements on at least one pitch circle distributed circumferentially about the drum longitudinal axis.

13. The cable drum of claim 12, further comprising more than five push elements.

14. The cable drum of claim 12, wherein the push elements are on a plurality of pitch circles of different pitch circle diameters, each distributed in the circumferential direction, wherein at least four push elements are on each pitch circle.

15. The cable drum of claim 12, wherein the push elements are axially adjustable individually and/or independently of each other.

16. The cable drum of claim 12, wherein the push elements each comprise a screw bolt screwed into a guard plate part surrounding the respective push element, and wherein each push element carries a push head, wherein the push head is axially adjustable by screwing the screw bolt and can be adjusted to project to different extents beyond the inner wall of the surrounding guard plate parts, and wherein the push head comprises a cable contact surface.

17. The cable drum of claim 16, wherein the push head is integrally formed in one piece on an end face of said screw bolt.

18. The cable drum of claim 16, wherein the push head is formed separately from the screw bolt and comprises a softer material than the screw bolt.

19. The cable drum of claim 1, wherein a clamping and/or holding device for fixing the push elements in a desired axial position is associated with the push elements.

20. A cable winch comprising the cable drum of claim 1.

21. A cable drive comprising a cable and the cable winch of claim 20.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0055] The invention will be explained in more detail in the following with respect to preferred embodiments and to associated drawings. The drawings show:

[0056] FIG. 1 shows a perspective view of a cable drum for the cable winch of a cable drive, which has a drum body provided with a groove and two guard plates provided at the ends,

[0057] FIG. 2 shows a partial longitudinal section through the cable drum of FIG. 1, showing the adjustable inner wall part of a guard plate and the adjustable pretensioning device for pretensioning the adjustable inner wall part,

[0058] FIG. 3 shows an enlarged, sectional view of the adjustable pretensioning device for adjusting and pretensioning the inner wall part of the guard plate of FIG. 2,

[0059] FIG. 4 shows longitudinal section through the guard plate of the cable drum of FIG. 1 according to a further embodiment of the invention, according to which the guard plate has as adjustable inner wall parts several adjustment rings which are screwed together at their parting lines in order to achieve an axial adjustment by twisting the adjustment rings,

[0060] FIG. 5 shows a half plan view of the guard plate of FIG. 4, showing the adjustment rings seated against each other,

[0061] FIG. 6 shows a sectional, enlarged cross-sectional view of the seam between two adjustment rings and the clamping device for fixing the screw connection between the two adjustment rings,

[0062] FIG. 7 shows a half-section view, enlarged again, of the seam between two adjustment rings, showing a screw bolt of the clamping device for clamping the screw connection,

[0063] FIG. 8 shows a longitudinal sectional view of a guard plate of the cable drum of FIG. 1 according to a further embodiment of the invention, according to which several axially adjustable push elements are provided in the guard plate,

[0064] FIG. 9 shows a half plan view of the guard plate of FIG. 1, showing the distribution of the push pads on the guard plate,

[0065] FIG. 10 shows a cross-sectional view of a push element shown in FIGS. 8 and 9, showing the bolting of the push element to a fixed guard plate part and the clamping device for clamping the bolting,

[0066] FIG. 11 shows a top view of the push element of FIG. 10, showing tool attachment contours for twisting the push element and the clamping device,

[0067] FIG. 12 shows a cross-sectional view of a push elements shown in FIGS. 8 and 9, showing the screw connection of the push elements to the fixed guard plate part, a separate push head, and a lock nut for securing the push element in a desired position, and

[0068] FIG. 13 shows a top view of the face of the push element on FIG. 12, showing the tool attachment contours for twisting the push element and the lock nut.

DETAILED DESCRIPTION

[0069] As FIG. 1 shows, the cable winch 1 comprises a cable drum 2 having an at least approximately cylindrical drum body 3 and two guard plates 4 extending transversely to the longitudinal axis 5 of the drum body 3, adjoining said drum body 3 at the end face and projecting radially beyond the drum body 3 to laterally delimit the winding space 6 above the outer circumferential surfaces of the drum body 3 therebetween.

[0070] Said guard plates 4—at least a part thereof, as will be explained—may be rigidly attached to the drum body 3 at the end face, for example in a form-fitting and/or force-fitting manner, for example by means of screw bolts which may be screwed tightly through the guard plates 4 in the drum body 3 and pull the guard plates 4 against the drum body 3 at the end face.

[0071] Said cable drum 2 can be rotatably mounted on a winch frame 8, wherein, for example, the guard plates 4 can have bearing portions by means of which the cable drum 2 is rotatably mounted on the winch frame 8, for example by means of roller bearings.

[0072] To drive the cable drum 2, the cable winch 1 can have a drive gear that can be at least partially received in the interior of the cable drum 2 and/or can extend through one of the guard plates 4. A drive motor, for example in the form of a hydraulic or electric motor, can drive the drum body and thus the cable drum 2 in rotation via said drive gear.

[0073] As FIG. 1 shows, the drum body 3 can be provided with a cable groove on its outer circumference, which can comprise helically extending cable grooves 9, which can be adapted to the diameter of the cable 10 to be wound up in order to fit closely against the cable 10 or to support it in the form of a shell, cf. FIG. 2.

[0074] As the figures show, at least one, preferably each, of the guard plates 4 comprises at least one axially adjustable inner wall part 11, which forms a cable contact surface for the cable 10 to be wound up and delimits the winding space 6. Said axially adjustable inner wall part 11 can thereby be adjusted at least approximately in the direction of the longitudinal axis 5, namely towards the opposite guard plate 5 or vice versa back or away from it, in order to be able to change the distance between the guard plates 4 and thus the width of the winding space 6.

[0075] As FIG. 2 shows, the axially adjustable inner wall portion 11 may include an adjustment ring 12 that may extend substantially the entire height of the guard plate 4. The adjustment ring 12 can form essentially the entire cable contact surface of the guard plate 4, wherein the cable contact surface for a lowest winding layer wound directly on the drum body 3 can be formed by a fixed guard plate part 13 and the cable contact surface for all further winding layers above it can be formed by said adjustment ring 12.

[0076] The adjustment ring 12 may form a substantially flat annular plate, the annular surface of which facing in the winding space 6 may be substantially flat and/or radially oriented. If necessary, it would also be possible to provide a slight slope so that the said cable contact surface of the adjustment ring 12 or the adjustment ring 12 as a whole can be slightly conical.

[0077] As FIG. 2 shows, the adjustment ring 12 can be guided axially displaceably on the fixed guard plate part 13, wherein said fixed guard plate part 13 can, for example, have a rail guide shoulder 14, for example in the form of an annular shoulder, on which guide shoulder 14 there is seated and displaceably guided the adjustment ring 12.

[0078] Alternatively or additionally, however, the adjustment ring 12 can also be guided axially displaceably on the fixed guard plate part 13 by means of another rail guide, for example by means of rail guide pins which extend parallel to the longitudinal axis 5 of the drum and are seated displaceably in rail guide holes in the adjustment ring 12 and/or the fixed guard plate part 13 and, if necessary, can also be fixed rigidly to one of the guard plate sliding segments.

[0079] Such rail guide pins 15 can also serve at the same time as a holding and/or clamping unit for mounting the cable drum 2, in particular for mounting the push springs which are yet to be described. However, the bolts 15 shown in FIG. 2 can also be removed during operation, in which case they need not form rail guide bolts, but can be simple screw bolts. Regardless thereof, the adjustment ring 12 can also be supported for axial displacement solely by the guide shoulder 14 shown.

[0080] Advantageously, however, adjustment path limiters 16 can also have rail guide pins, see FIG. 2, in order to guide the adjustable inner wall in an axially displaceable manner and to limit its displacement.

[0081] Advantageously, the adjustment ring 12 can be subjected to a pretensioning force by a pretensioning device 17, which tries to drive the adjustment ring 12 inwards, i.e. towards the opposite guard plate 4.

[0082] Such a pretensioning device 17 may, for example, include at least one spring device 18 which attempts to push the adjustment ring 12 away from the fixed guard plate part 13. The spring device 17 can be arranged between the adjustment ring 12 and the fixed guard plate part 13, for example accommodated in pockets formed therein.

[0083] The axial travel of adjustment path 12 may be limited by adjustment path limiters 16, said adjustment path limiters 16 being capable of limiting travel inwardly toward winding space 6 and/or limiting travel outwardly away from said winding space 6, wherein separate adjustment path limiters 16a and 16b may be provided to limit travel in both directions.

[0084] Advantageously, said adjustment path limiters 16 can be configured to be adjustable in order to variably preset the respective end position of the adjustable inner wall. Advantageously, the adjustment path limiters 16 can also be configured to reduce the travel to zero or to completely fix the adjustment ring 12 in a desired position.

[0085] As FIG. 2 shows, an adjustment path limiter 16a can limit the travel inwards, wherein the adjustment path limiter 16a can comprise a screw bolt which is fastened to the adjustment ring 12, for example screwed, or can also retain the adjustment ring 12 positively by a head only.

[0086] Said screw bolt of the adjustment path limiter 16 may pass through the fixed guard plate part 13 and be retained on the outer or rear side of the fixed guard plate part 13 by means of a nut 18. By adjusting the nut 18, the adjustment path can be variably set, as shown by the adjustment dimension y in FIG. 3. Alternatively or additionally, however, an adjustment of the adjustment path could also be varied by screwing on the adjustment ring 12 and/or in other ways, for example by means of clamping claws which can be fixed in different axial positions and which could replace the nut 18.

[0087] As shown in FIGS. 2 and 3, a spring device 19 can be provided between the adjustment ring 12 and the nut 18 to fix the adjustment path limiter 16a, in particular its screw bolt, in a position in contact with the adjustment ring 12.

[0088] The position of the nut 18 shown in FIG. 2, resting against the outside of the guard plate part 13, limits the travel of the inner wall 11 inward toward the winding space 6, while FIG. 3 shows a spring-back position.

[0089] The adjustment travel outward away from the winding space 6 can be limited by one or more adjustment path limiters 16b, for example, by screw bolts that project from the fixed guard plate part 13 toward the adjustment ring 12 and support it when the adjustment ring 12 is pressed away from the winding space 6 against the pretensioning force of the pretensioning device 17. By screwing said screw bolts or axially adjusting the adjustment path limiters 16b so that they extend more or less far from the fixed guard plate part 13, the position of the adjustment ring 12, or more precisely its maximum retraction position away from the winding space 6, can be specified.

[0090] As FIGS. 4 to 7 show, one or each guard plate 4 can also have several axially adjustable inner wall parts 11, for example in the form of several adjusting rings 12, which can be arranged concentrically to one another and together form the rope contact surface of the guard plate 3, cf. FIG. 4.

[0091] In particular, several adjustment rings 12 with different ring diameters can be provided, wherein the smallest or an innermost adjustment ring can be seated on a fixed guard plate part 13, which can be rigidly connected to the drum body 3.

[0092] Said adjustment rings 12a and 12b can be seated one inside the other, whereby in turn the fixed guard plate part 13 can be seated in the innermost adjusting ring 12a, wherein at least in one axial position the adjustment rings 12a and 12b and the fixed guard plate part 13 can form a substantially smooth, in particular flat, cable contact surface.

[0093] The adjustment rings 12 may be connected to each other by a screw thread 20 in the parting line between the adjacent adjustment rings 12, or may be connected to said fixed guard plate part 13 by a screw thread 20 in the parting line between the fixed guard plate part 13 and the innermost adjustment ring 12a, so that the adjustment rings 12 are axially adjustable by twisting. If, for example, the innermost adjustment ring 12a is rotated, the innermost adjustment ring 12a and, together with it, the further outer adjustment rings 12b undergo an axial adjustment relative to the stationary guard plate part 13. If, on the other hand, the outer adjustment ring 12b is rotated relative to the inner adjustment ring 12a, the outer adjustment ring 12b adjusts axially, i.e. parallel to the longitudinal axis 5 of the drum body 3.

[0094] As FIG. 2 shows in conjunction with FIG. 8 and the winding layers shown there, each adjusting ring 12 can extend in the radial direction over a height corresponding to several cable diameters. In other words, each adjustment ring 12 can form the cable contact surface for several winding layers, for example for three to five winding layers. Regardless thereof, the fixed guard plate part 13 can also have a height corresponding to several cable diameters, so that a contact surface for several winding layers is provided on the fixed guard plate part 13, cf. comparative FIGS. 4 and 8.

[0095] In order to be able to fix the adjustment rings 12a and 12b in a certain screwed position and thus axial position, the screw threads 20 can be pretensioned. In particular, a clamping device 21 can be provided by means of which the adjustment rings 12a and b can be clamped against each other and against the fixed guard plate part 13, respectively.

[0096] Advantageously, the adjustment ring 12 may include a clamping portion 22 on which a portion of the screw thread 20 is formed and which may include an undercut 23 extending into the screw thread 20. A clamping portion 24 can pass through said undercut 23 to clamp the screw thread portions located on either side of the undercut 23. Said clamping portion 24 may in particular be a screw bolt which can be screwed through the undercut 23 into the body of the adjustment ring 12, cf. FIGS. 6 and 7.

[0097] As shown in FIGS. 8 to 13, the guard plates 4 may also have a plurality of push elements 25, each forming an axially adjustable inner wall portion 11. As shown in particular in FIGS. 8 and 9, several groups of push elements 25 can each be arranged distributed on pitch circles 26a to n of different diameters in order to be able to apply different axial loads to different winding layers. The multiple push elements 25 distributed along a respective pitch circle 26 also make it possible to achieve different support ratios within a winding layer, especially in the run-up areas of the outermost cable winding, which winds onto the guard plate 4 at an acute angle and also unwinds from it at an acute angle.

[0098] For example, more than four or more than eight or more than twelve or even more than 20 push elements 25 can be arranged distributed on a pitch circle, wherein two, three, five or even ten pitch circles with pressure pieces can be provided.

[0099] As FIG. 8 shows, the push elements 25 can have a diameter corresponding to two or three or four or five times the cable diameter, so that one push element 25 forms a cable contact surface for two or three or four or five winding layers.

[0100] As FIGS. 10 to 13 illustrate, said push elements 25 can be axially adjusted by twisting or screwing and/or can be extended to different extents from the inner face of the fixed guard plate part 13 to project beyond the inner face of the guard plate part 13.

[0101] It should be clarified, however, that said push elements 25 can also be provided in self-adjustable guard plate parts, for example the previously described adjustment rings 12.

[0102] In particular, the push elements 25 may each comprise a screw bolt 27 that is screwed into the guard plate part receiving the push elements 25. The respective screw bolt 27 can form a push head 28 with its end face itself, which forms a cable contact surface. Alternatively, the push head 28 can also be configured separately from the screw bolt 27 and, for example, be placed on the front side of the latter, as shown in FIG. 12. A separate design of the push head 28 makes it possible, the push head 28 can be attached to the screw bolt 27 independently thereof in a form-fit and/or force-fit manner or also in a material-fit manner.

[0103] As FIGS. 11 and 13 make clear, the screw bolt 27 can preferably have a tool contour 29 on its rear side, i.e. the end face facing away from the winding space 6, in order to be able to apply a turning or screwing tool.

[0104] In order to be able to freeze or fix the screw bolt 26 in a certain rotational position and thus the push element 25 in a certain axial position, the push elements 25 can have a clamping and/or fixing device.

[0105] As FIG. 10 shows, for example, the screw thread 29 with which the push elements 25 can be screwed into the surrounding guard plate part 13 can be pretensioned or clamped. For this purpose, similar to that described in connection with FIGS. 6 and 7, an undercut 23 may be provided in the screw bolt 27 and interrupt the screw thread 29. By screwing in a clamping means, for example a clamping screw through the undercut 23, the screw thread 29 can be clamped.

[0106] Alternatively or additionally, a lock nut 30 can be used, which is screwed onto a protruding bolt portion and pretensioned against the surrounding guard plate part, see FIGS. 12 and 13.