WINCH ARRANGEMENT

Description

[0001] The present invention relates to a cable winch arrangement according to the preamble of patent claim 1. Furthermore, the invention relates to a crane, a travel drive with at least one cable winch arrangement and a rake cleaning device.

[0002] Cable winch assemblies are used in a variety of designs for winding and / or unwinding at least one cable, with the at least one cable usually being wound onto and / or unwound from a circular-cylindrical cable drum, also called a winch. The at least one cable is usually spiral-shaped, in particular helical or helical, and can be wound or is wound onto the cable drum. A characteristic of common cable winch assemblies is that the cable run-off point of the at least one cable, at which the cable runs tangentially onto or off the cable drum, is variable in position. This means that the cable run-off point moves along a direction parallel to the drum axis of the cable drum during winding or unwinding of the cable. This movement could also be described as a "wandering" of the cable run-off point on a drum shell of the cable drum during rotation of the cable drum.The "wandering" of the rope pay-off point along the drum shell of the rope drum results in a freely hanging rope end of a rope wound sectionally on the rope drum, to which, for example, a load is attached, being moved along with the rope pay-off point parallel to the drum axis, which is why, during the lifting or lowering movement of the rope, there is also a simultaneous, usually undesirable, superimposed displacement of the load in a direction parallel to the drum axis.

[0003] Rope pulleys are often used to direct at least one rope running from the rope drum in a predetermined direction. Rope pulleys have a circumferential rope groove in which the rope is guided. An important parameter of a rope pulley is the lateral angle of attack of the rope as it runs into or out of the rope groove of the rope pulley. The lateral angle of attack is the angle of lateral deflection of the rope with respect to a groove plane in which the rope groove of the rope pulley is arranged. A large lateral angle of attack, e.g. more than 4°, has a considerable influence on the service life of the rope. In order to limit the lateral angle of attack, rope pulleys must therefore be arranged at a relatively large distance from the rope drum.

[0004] Document DE 101 35 034 C1 discloses a cable winch assembly with a displacement unit that longitudinally displaces the cable drum synchronously with the winding and unwinding of the cables, such that the respective cable discharge points are always at the same location relative to a hoist frame. This allows the lateral starting angle of the cable on the respective cable pulley to be kept constant. In one possible embodiment, the displacement unit has a threaded spindle drive for displacing the cable drum, with the threaded spindle drive being coupled to the cable drum axis via a toothed belt.

[0005] CN 102285603 A discloses a cable winch arrangement according to the preamble of claim 1.

[0006] The object of the invention is to provide an advantageous cable winch arrangement of the type mentioned at the outset, which can be designed simply.

[0007] According to the invention, this is achieved by a cable winch arrangement having the features of claim 1.

[0008] In the cable winch assembly according to the invention, the spindle axis is arranged coaxially with the drum axis of the cable drum. This means that the spindle axis lies on a common axis with the drum axis of the cable drum. This allows for a simple design of the cable winch assembly.

[0009] For the purposes of the invention, the spindle drive is a helical gear. In particular, the spindle drive according to the invention can be a trapezoidal screw drive, a ball screw drive, a roller screw drive with roller return, a planetary roller screw drive, a high-helix screw drive, etc. The spindle drive connects the supporting structure to the cable drum, whereby an adjustment of the spindle drive leads to a relative displacement of the cable drum relative to the supporting structure. The adjustment of the spindle drive occurs in the direction of the spindle axis. Since the drum axis of the cable drum is arranged coaxially to the spindle axis, the relative displacement of the cable drum relative to the supporting structure also occurs in a direction parallel to the drum axis or the spindle axis.

[0010] The expression "at least substantially stationary" means that the rope payoff point is at least substantially immobile relative to the supporting structure during the winding or unwinding of the rope. The rope payoff point is specifically the point at which a longitudinal center axis of the rope transitions from a helical orientation—which a section of the rope wound on the rope drum assumes—to a tangential direction—relative to the drum shell of the rope drum. The rope payoff point could also be referred to as the rope take-up point or the rope take-up and payoff point. In this context, the expression "at least substantially" means that the rope payoff point moves parallel to the drum axis between a fully unwound state of the rope and a fully wound state of the rope, preferably by less than the amount of one rope diameter of the rope.

[0011] The term "supporting structure" is to be interpreted broadly within the meaning of the invention. The supporting structure can, for example, be a load-bearing component of a crane's trolley, a base frame of a trash rack cleaning device, or a chassis. In any case, the supporting structure serves to support the cable drum and absorb the cable forces acting on it. The cable drum can rest on the supporting structure or be connected to the supporting structure in another way. For example, it is also conceivable and possible for the cable drum to hang from the supporting structure.

[0012] The cable drum is rotatably mounted on a bearing frame. The bearing frame could also be referred to as a support frame or drum frame. Advantageously, it is provided that, apart from the rotation of the rotatably mounted cable drum, no relative movement is possible between the cable drum and the bearing frame. Advantageously, the bearing frame can be displaced together with the cable drum relative to the support structure. To reduce the friction between the bearing frame supporting and supporting the cable drum and the support structure when displacing the cable drum or the bearing frame relative to the support structure, the cable winch arrangement can have a sliding guide or a roller guide.

[0013] Preferably, the spindle extends, at least in one end position, at least partially into a hollow space in the cable drum. This allows for a particularly compact design of the cable winch assembly. The cable winch assembly advantageously has two end positions, wherein the end positions limit the travel path of the cable drum relative to the support structure in opposite directions aligned parallel to the spindle axis and the drum axis, respectively.

[0014] The hollow space of the rope drum could be completely bounded in the radial direction relative to the drum axis by a drum shell. Furthermore, the rope drum could have two opposing drum flanges that define the hollow space in the axial direction relative to the drum axis.

[0015] It is particularly preferred that the spindle of the spindle drive is arranged in one of the end positions over at least 50%, preferably at least 70%, of the length of the spindle in the cavity of the cable drum.

[0016] In a preferred embodiment, the spindle has an external thread with a pitch, wherein the pitch of the external thread corresponds at least to the rope diameter of the at least one rope. The pitch refers to the distance between two threads in a direction parallel to the spindle axis. The pitch indicates the extent of adjustment of a spindle nut of the spindle drive in a direction parallel to the spindle axis when the spindle nut is rotated relative to the spindle by 360°, i.e. by one revolution. In the context of the invention, the rope diameter means the external diameter of the rope. A rope often has a cross-section that deviates from a circle when viewed in a cross-section orthogonal to the longitudinal center axis of the rope. The rope diameter could also be referred to as the diameter of the smallest circumscribed circle encompassing the cross-section of the rope.

[0017] Preferably, the cable drum has a drum shell with at least one spiral groove for receiving at least one of the cables, wherein a pitch of the spiral groove corresponds to the pitch of the external thread of the spindle. The at least one spiral groove of the drum shell advantageously extends helically along, in particular around, the drum axis. The at least one groove of the drum shell could also be referred to as helical or screw-shaped. The at least one groove can extend helically over the entire longitudinal extent of the drum shell. However, it is also conceivable and possible for the drum shell to have several grooves which, with respect to the direction of the drum axis, can be arranged one behind the other and spaced apart from one another. In other embodiments, it is conceivable and possible for the spiral grooves to be nested within one another, i.e.that the pitch of a respective spiral groove is greater than the rope diameter of the at least one rope. For example, the pitch could be an integer multiple of the rope diameter. It is possible, for example, for four congruent spiral grooves, each having a pitch corresponding to four times the rope diameter, to be offset by a quarter turn in relation to a circumferential direction of the drum axis of the rope drum. However, this is only a concrete exemplary embodiment and can be applied to any number of ropes. The entirety of the grooves of the drum shell could also be referred to as multi-start grooving. In a possible alternative embodiment, an outer surface of the drum shell could be designed in the shape of a circular cylinder, i.e. essentially smooth. This means that a grooved drum shell is then dispensed with.

[0018] In one possible embodiment according to the invention, it could be provided that the spindle is fixed to the support structure in a rotationally fixed and immovable manner, at least in the axial direction relative to the spindle axis. Particularly preferably, the spindle is fixed to the support structure, i.e., all degrees of freedom of the spindle with respect to the support structure are blocked.

[0019] The invention provides for a spindle nut of the spindle drive, which engages the spindle, to be secured to the cable drum in a rotationally fixed manner. Thus, the rotational movement of the cable drum can be transmitted directly to the spindle nut.

[0020] In another possible embodiment according to the invention, the spindle drive can be provided with a spindle drive for rotating the spindle relative to the support structure. It is conceivable that, during operation, the rotational movement of the cable drum overlaps with the rotation of the spindle of the spindle drive. Overall, however, within the meaning of the invention, it is always provided that the cable discharge point of the at least one cable is, at least substantially, stationary relative to the support structure.

[0021] The present invention also relates to a crane, in particular a gantry crane, for transporting at least one container or other load, wherein the crane has at least one trolley mounted so as to be movable on a crane girder of the crane and a load-carrying device for connection to the container or other load, wherein the load-carrying device is suspended from the trolley by means of cables of the trolley so as to be raised and lowered, wherein the trolley has at least one cable winch arrangement according to the invention for winding and / or unwinding the cables of the trolley.

[0022] It could be provided that a separate cable winch assembly is provided for each cable of the trolley. It is particularly preferred if several cables, e.g., four cables, can be wound onto a common cable drum. As already explained in connection with the possible embodiments of the cable winch assembly, the grooves for receiving a respective cable can be arranged one behind the other, i.e., spaced apart from one another, relative to the direction of the drum axis. Cable drum designs with multiple grooves are also conceivable and possible.

[0023] Furthermore, the invention relates to a travel drive for displacing a transport unit movable along travel rails, wherein the travel drive comprises at least one cable winch arrangement according to the invention. The movable transport unit can be a crane, for example. In another embodiment, the movable transport unit can be a trolley mounted for movement on a crane girder. In preferred embodiments, the cable winch arrangement is arranged on the transport unit. It is particularly advantageous if the drum axis of the cable drum is aligned parallel to a longitudinal extension of the travel rails.

[0024] The invention also relates to a rake cleaning device for cleaning a rake, in particular of a hydroelectric power plant. The rake cleaning device comprises a cleaning device, in particular a cleaning rake or a gripping tool, for collecting debris accumulated on the rake and a drive arrangement for actuating the cleaning device. The drive arrangement comprises at least one cable winch arrangement according to the invention. The cable winch arrangement makes it possible to dispense with a complicated cable pulley arrangement for deflecting the cables in drive arrangements of the cleaning device.

[0025] The drive arrangement of the rake cleaning device enables, in particular, the opening, closing, or pivoting of the cleaning device for picking up or releasing debris. Furthermore, it could alternatively or additionally be provided that the rake cleaning device is supported on rails and has a travel drive comprising a cable winch arrangement according to the invention for moving the rake cleaning device along the rails.

[0026] Further advantages and details of the invention are explained below with reference to the exemplary embodiments shown in the figures. These figures show: Fig. 1 a view of a first embodiment of a cable winch arrangement according to the invention in a first end position; Fig. 2 the cable winch arrangement according to Fig. 1in a second end position; Fig. 3 and 4 a cable winch arrangement not falling within the scope of the claims in representations analogous to the Fig. 1 and 2 ; Fig. 5 and 6 a cable winch arrangement not falling within the scope of the claims in views analogous to the Fig. 1 and 2 ; Fig. 7 and 8 a crane according to the invention in two different working positions; Fig. 9 an isometric view of a trolley of the crane according to Fig. 7 in the Fig. 7 shown working position; Fig. 10 a view orthogonal to a longitudinal extension of the trolley rails according to Fig. 9 ; Fig. 11 a plan view of the trolley according to Fig. 9 ; Fig. 12 to 14Representations analogous to the Fig. 9 to 11 for the Fig. 8illustrated working position of the crane; Fig. 15 to 18 an alternative embodiment of a cable winch arrangement according to the invention in two end positions; Fig. 19 an isometric view of a rake cleaning device according to the invention with a travel drive; Fig. 20 the travel drive of the rake cleaning device according to Fig. 19 in detail; Fig. 21 a plan view of the drive according to Fig. 20 in a first end position; Fig. 22 a plan view of the drive according to Fig. 20 in a second end position; Fig. 23 an embodiment of a cleaning device for a rake cleaning device; Fig. 24 an isometric view of the cable winch arrangement of the cleaning device according to Fig. 23 ; Fig. 25 a plan view of the cable winch arrangement according to Fig. 24 in a first end position, and Fig. 26 a plan view of the cable winch arrangement according to Fig. 24 in a second end position.

[0027] For reasons of clarity, not all reference symbols are shown in the figures.

[0028] The Fig. 1 and 2 The cable winch arrangement 1 according to the invention shown has a cable drum 2 for winding and / or unwinding a cable 30 and a bearing frame 8 for rotatably supporting the cable drum 2 which can be rotated about a drum axis 3. The bearing of the cable drum 2 on the bearing frame 8, which is designed, for example, with roller bearings, is shown in the Figures 1 and 2 not shown separately. However, such arrangements are generally known in a variety of forms.

[0029] The cable drum 2 has a drum shell 4 and two drum flanges 7, which are connected to the drum shell 4 on opposite sides in the axial direction relative to the drum axis 3. A cavity 5 is formed inside the cable drum 2, which, in the radial direction relative to the drum axis 3, is delimited by the drum shell 4. In the axial direction, relative to the drum axis 3, the cavity 5 is delimited by the drum flanges 7.

[0030] In the exemplary embodiment, the drum shell 4 has a spiral groove 10 for receiving the rope 30. The spiral groove 10 is helical, i.e., in the manner of a helix extending along the drum axis 3. The groove 10 could also be referred to as grooving. In the exemplary embodiment, the pitch of the spiral groove 10 corresponds to the rope diameter of the rope 30. In another embodiment, the pitch of the groove 10 could also have a pitch that is greater than the rope diameter of the rope 30, i.e., the turns of the section of the rope 30 wound on the drum shell 4 are then spaced from one another. In other embodiments, the drum shell 4 of the rope drum 2 could also be designed without grooves. This means that the outer surface of the drum shell 4 could, for example, be circular cylindrical, i.e., smooth.

[0031] The cable winch assembly 1 further comprises a drum drive 9 for rotating the cable drum 2 about the drum axis 3 relative to the bearing frame 8. The drum drive 9 can be a geared motor, as shown in the figures.

[0032] The bearing frame 8 is supported on a support structure 20 by means of support rollers 22 of the cable winch assembly 1. The support rollers 22 facilitate the relative movement of the bearing frame 8 and thus of the cable drum 2 relative to the support structure 20. In another embodiment, skids or similar devices could be used instead of support rollers 22.

[0033] The supporting structure 20 is in the Fig. 1 and 2shown only schematically in order to clarify the principle of the cable winch arrangement 1 according to the invention. In connection with the application examples of the cable winch arrangement 1 according to the invention, which are still to be explained, possible embodiments of the support structure 20 are discussed. The support structure 20 has in the Fig. 1 and 2 The illustrated embodiment has a cable passage 21 through which the cable 30 is threaded. However, a cable passage 21 is not mandatory.

[0034] The cable winch assembly 1 has a spindle drive 14 for displacing the cable drum 2 relative to the support structure 20. The spindle drive 14 comprises a spindle 16 extending along a spindle axis 15 and a spindle nut 17 that engages the spindle 16. The spindle drive 14 connects the support structure 20 to the cable drum 2. The spindle axis 15 of the spindle drive 14 is arranged coaxially with the drum axis 3 of the cable drum 2.

[0035] In the first embodiment, the spindle 16 is fixed to the support structure 20 in a rotationally fixed manner and immovably in the axial direction relative to the spindle axis 15. The spindle 16 is also immovably fixed to the support structure 20 in all directions orthogonal to the spindle axis 15.

[0036] In the first embodiment, the spindle nut 17 is secured to the cable drum 2 in a rotationally fixed manner. A rotation of the cable drum 2 by means of the drum drive 9 therefore leads to a corresponding rotation of the spindle nut 17.

[0037] An adjustment of the spindle nut 17 relative to the spindle 16 along the spindle axis 15 leads to a corresponding adjustment of the cable drum 2 along the drum axis 3 relative to the support structure 20. In the exemplary embodiment, the cable winch assembly 1 has two end positions that limit the displacement path of the spindle nut 17 relative to the spindle 16. Overall, the cable drum 2 can thus also be displaced between the first end position and the second end position of the cable winch assembly 1 relative to the support structure 20.

[0038] In summary, in the first embodiment it is provided that the bearing frame 8 together with the cable drum 2 and the spindle nut 17 and the drum drive 9 can be displaced along the drum axis 3 relative to the support structure 20.

[0039] In the exemplary embodiment, the spindle drive 14 is designed as a trapezoidal screw drive. This means that the spindle nut 17 has a trapezoidal internal thread, and the spindle 16 has a trapezoidal external thread, which mesh with each other. Other spindle drive designs are also conceivable and possible, as already mentioned at the beginning. For example, the spindle drive 14 could also be a flat screw drive.

[0040] In the first exemplary embodiment, the pitch of the spiral groove 10 corresponds to a pitch of the external thread of the spindle 16. A rotation of the cable drum 2 by one revolution, i.e. by 360°, therefore leads to a relative displacement of the cable drum 2 with respect to the support structure 20, in a direction parallel to the drum axis 4, by the pitch of the external thread of the spindle 16. This ensures that a cable run-off point 6 of the cable 30, at which the cable 30 runs up and / or down tangentially from the cable drum 2, is at least substantially stationary with respect to the support structure 20. Since the pitch of the external thread of the spindle 16 in the first exemplary embodiment corresponds to the pitch of the spiral groove 10 of the drum shell 4, it is thus necessarily ensured that the cable run-off point 6 is always stationary with respect to the support structure 20.

[0041] In Fig. 1the cable drum 2 is shown in the first end position of the cable winch arrangement 1, in which the cable 30 is unwound from the cable drum 2, apart from a remaining residual length which is wound on the cable drum 2.

[0042] In Fig. 2 The second end position is shown, in which the rope 30 is wound up to its maximum on the rope drum 2. In a summary of the Fig. 1 and 2 It is immediately apparent that the rope payoff point 6 is stationary, i.e., immobile, with respect to the supporting structure 20. This ensures that the rope 30 can run through the rope passage 21 regardless of the length of the section of the rope 30 wound onto the rope drum 2.

[0043] In the embodiment shown, it is provided that the spindle 16, in particular a section of the spindle 16 having the external thread, is in the second end position, cf. Fig. 2, extends over at least 70% of the longitudinal extent of the spindle 16, in particular the longitudinal extent of the external thread of the spindle 16, into the cavity 5 of the cable drum 2.

[0044] In the Fig. 3 and 4 A cable winch arrangement 1 is shown which is not covered by the scope of protection. The structure of the cable drum 2, the drum drive 9 and the support structure 20 corresponds to that of the embodiment of the Fig. 1 and 2 , so that in the explanations to the Fig. 3 and 4 mainly on the differences to the embodiment according to the Fig. 1 and 2 Apart from the differences listed below, the explanations for the example of the Fig. 1 and 2 also with the Fig. 3 and 4 .

[0045] In the Fig. 3 and 4it is provided that the external thread of the spindle 16 has a pitch which is smaller than the rope diameter of the rope 30. Accordingly, the pitch of the external thread of the spindle 16 is smaller than the pitch of the spiral groove 10 of the drum shell 4 of the rope drum 2. In order to ensure that the rope run-off point 6 of the rope 30, at which the rope 30 runs tangentially from the rope drum 2 and / or runs onto the rope drum 2, is at least substantially stationary with respect to the support structure 20, the spindle drive 14 has a transmission gear 18. The transmission gear 18 transmits the rotary movement of the rope drum 2 to the spindle nut 17 of the spindle drive 14, which engages in the spindle 16. This means that the speed of the spindle nut 17 in the second exemplary embodiment is different from the rotational speed of the rope drum 2.The transmission gear 18 is configured in such a way that a displacement of the spindle nut 17 on the spindle 16, when the cable drum 2 is rotated by one revolution, corresponds to the pitch of the groove 10 of the cable drum 2 or the cable diameter of the cable 30.

[0046] In the Fig. 3 and 4 It is provided that the transmission gear 18 is fixed to the bearing frame 8 in a rotationally fixed manner and transmits the rotational movement of the cable drum 2 to the spindle nut 17, with the corresponding transmission of the speed.

[0047] In the Figs. 5 and 6 A cable winch arrangement 1 is shown which does not fall under the scope of the claims. The structure of the cable drum 2, the drum drive 9 and the support structure 20 corresponds to that of the first embodiment according to the Fig. 1 and 2 , so that in the explanations to the Figs. 5 and 6mainly the differences to the first embodiment are pointed out. Apart from the differences listed below, the explanations for the first embodiment also apply to the Figs. 5 and 6 .

[0048] In the Figs. 5 and 6 is - similar to the Fig. 3 and 4 - it is provided that the external thread of the spindle 16 has a smaller pitch than the rope diameter of the rope 30. Accordingly, the pitch of the external thread of the spindle 16 is also smaller than the pitch of the spiral groove 10 of the drum shell 4 of the rope drum 2. However, this is not mandatory; in an alternative embodiment, it could also be provided that the pitch of the external thread of the spindle 16 corresponds at least to the rope diameter of the rope 30 and / or at least to the pitch of the spiral groove 10.

[0049] The spindle drive 14 points in the Figs. 5 and 6a spindle drive 19 for rotating the spindle 16 about the spindle axis 15 relative to the support structure 20. The spindle nut 17 is fixedly mounted on the bearing frame 8 in a rotationally fixed manner. A rotation of the spindle 16 by means of the spindle drive 19 causes a relative movement of the cable drum 2 with respect to the support structure 20. The spindle drive 19 is controlled by means of control electronics (not shown in detail) in such a way that the cable run-off point 6 of the cable 30, at which the cable 30 runs up and / or down tangentially from the cable drum 2, is at least substantially stationary relative to the support structure 20. In other words, the spindle drive 19 is controlled by means of the control electronics in such a way that the rotational movement of the cable drum 2 and the adjustment of the cable drum 2 by means of the drum drive 9 about the drum axis 3 in a direction parallel to the drum axis 3 are coordinated with one another, i.e.synchronous, wherein the rope payoff point 6 is at least substantially stationary with respect to the support structure 20. For this purpose, the control electronics could, for example, simultaneously control the drum drive 9 and the spindle drive 19 in order to effect synchronous control of the rope drum 2 and the spindle 16.

[0050] In one to Figs. 5 and 6 In an alternative embodiment of the invention, it would be conceivable for the spindle nut 17 to be fixed to the cable drum 2 in a rotationally fixed manner. This advantageously results in a superposition of the rotational movement of the cable drum 2 with that of the driven spindle 16. The control electronics can also ensure that the cable discharge point 6 is at least substantially stationary with respect to the support structure 20.

[0051] The following describes exemplary applications of the cable winch assembly 1 according to the invention. Each of the inventive embodiments described so far can, in principle, be used in the applications explained below. For the sake of simplicity, the exemplary embodiments described below refer to specific embodiments of the first embodiment of the cable winch assembly 1 explained above. The modifications explained below, which relate, for example, to the number of cables that can be wound on a cable drum, are equally applicable to the other embodiments of the cable winch assemblies according to the invention mentioned above.

[0052] In the Fig. 7 to 14A crane 40 designed as a gantry crane for transporting containers 41 in a container terminal is shown. The crane 40 is horizontally displaceable in a direction orthogonal to the plane of the drawing, with the crane 40 being supported by its undercarriages 45 on crane rails 49, see FIG. Fig. 7In another embodiment of the crane 40, the undercarriages 45 could also be pneumatic tires and travel directly on the ground. The crane 40 further comprises a crane girder 42, which spans the area between the crane rails 49, i.e., a storage area for containers 41. The crane girder 42 is supported on the undercarriages 45 via uprights 46 of the crane 40. A trolley 43 is movably mounted on the crane girder 42, which can also be referred to as the main girder. The trolley 43 is supported by means of unspecified rollers on trolley rails 47 attached to the crane girder 42. Furthermore, the crane 40 comprises a load-handling device 44 for connection to at least one container 41. The load-handling device 44 is suspended from the trolley 43 by ropes 30 to 37 of the trolley 43 and can be moved vertically relative to the trolley 43 by lengthening or shortening the free length of the ropes 30 to 37.All of this is known in the state of the art.

[0053] The ropes 30 to 37 extending between the trolley 43 and the load-carrying device 44 together form a rope shaft, also called a rope tower. Figs. 7 and 8 It can be seen that the geometry of the cable shaft, which is spanned by the cables 30 to 37, varies depending on the vertical position of the load-bearing device 44. In particular, the free length of the cables 30 to 37 and the relative angles between individual cables 30 to 37 to each other change, see also Fig. 9 and 12 .

[0054] In the illustrated embodiment, the trolley 43 has two cable winch assemblies 1 for winding and / or unwinding the cables 30 to 37 of the trolley 43. In the exemplary embodiment, the cables 30 to 33 can be wound onto a first cable drum 2 and the cables 34 to 37 can be wound onto a second cable drum 2. The entirety of the cables 30 to 33 could also be referred to as the first cable group and the entirety of the cables 34 to 37 as the second cable group. As a result, the cables 30 to 33, i.e. the first cable group, and the cables 34 to 37, i.e. the second cable group, are each synchronously wound onto the respective cable drum 2 or can be unwound from the respective cable drum 2.

[0055] The respective cable winch arrangement 1 comprises a cable drum 2 which is mounted rotatably about a drum axis 3 for winding and unwinding the respective cable group, wherein the cable winch arrangement 1 is analogous to the first embodiment according to the Fig. 1 and 2, is formed. That is, the cable winch arrangement 1 has a spindle drive 14 for displacing the cable drum 2 relative to the support structure 20 of the trolley 43. The spindle drive 14 comprises a spindle 16 extending along a spindle axis 15 and a spindle nut 14 which engages in the spindle 16. The spindle drive 14 connects the support structure 20 with the cable drum 2. The spindle axis 15 is, as only shown in Fig. 11 shown, arranged coaxially to the drum axis 3 of the cable drum 2. The spindle 16 is - analogous to the Fig. 1, 2 illustrated embodiment - is fixed to the support structure 20 in a rotationally fixed manner. The pitch of the external thread of the spindle 16 corresponds to the pitch of the spiral grooves 10 to 13, the latter being Fig. 14for one of the cable drums 2 are shown. The spindle drive 14 enables adjustment of the cable drum 2 relative to the support structure 20 of the trolley 43. The bearing frame 8 of the cable winch assembly 1 is supported by support rollers 22 on the support structure 20 of the trolley 43. Otherwise, with regard to the design of the cable winch assembly 1, reference is made to the explanations for the Fig. 1, 2 shown first embodiment.

[0056] In the embodiment of the crane 40 shown, the drum shell 4 of the respective rope drum 2 has four rope groove sections spaced apart from one another in a direction parallel to the drum axis 3, each with a groove 10, 11, 12 and 13, cf. Fig. 14in which the grooves 10-13 for one of the cable drums 2 are marked. This means that the cables 30 to 33 or 34 to 37 of a respective cable group run, relative to the longitudinal extent of the respective cable drum 2, at a distance from one another from the cable drum 2 or onto the cable drum 2.

[0057] The trolley 43 has cable pulleys 48 for deflecting a respective cable 30 to 37. The cable pulleys 48 have a circumferential cable groove in which the respective cable 30 to 37 is guided. The purpose of the cable pulleys 48 is to deflect the respective cable 30 to 37 to an anchoring point of a respective cable 30 to 37 on the load-carrying device 44.

[0058] Analogous to the Fig. 1 and 2In the first exemplary embodiment of the cable winch arrangement 1 shown, it is provided that a respective cable run-off point of the respective cable 30 to 37 wound on the cable drum 2, at which the respective cable 30 to 37 runs up and / or down tangentially from the cable drum 2, is at least substantially stationary relative to the support structure 20. This means that a rotation of the cable drum 2 leads to a corresponding displacement of the cable drum 2 relative to the support structure 20, wherein the respective cable run-off point is substantially stationary relative to the support structure 20. The respective cable run-off point was shown in the Figures 7 to 14 not shown for reasons of clarity.

[0059] Between the respective rope payoff point and the respective rope pulley 48, the respective rope 30 to 37 advantageously runs in a tangential direction with respect to the drum axis 3. Since the rope payoff points are immovable, the number of rope pulleys 48 of the trolley 43 can be minimized, since the run-up angle of the respective rope 30 to 37 from the rope drum 2 to the respective rope pulley 48 remains constant. Advantageously, the respective rope pulleys 48 are aligned and positioned such that the respective rope 30 to 37 to be deflected runs straight, i.e. without deviation from a rope groove plane of the respective rope pulley 48, from the respective rope payoff point into the rope groove of the respective rope pulley 48.

[0060] In the Fig. 15 to 18An alternative embodiment of a cable winch assembly 1 for a crane is shown. It is provided that the drum axis 3, and thus also the spindle axis 15 of the spindle drive 14, are vertically aligned. In the embodiment shown, the cables 30 to 33 run vertically downwards. As an example, the cable run-off point 6 has been drawn for the cable 32. The cable run-off point 6 is in relation to the supporting structure 20, which is Figs. 15 and 17 is only indicated schematically, stationary. To the same extent as the spindle nut 17 is moved along the spindle 16, the cable drum 2 is also moved relative to the supporting structure 20. In the Figs. 15, 17Each of the two end positions of the cable winch assembly 1 is shown, with a distance 23 between the indicated cable run-off point 6 of the cable 32 and a reference plane of the support structure 20 being constant in the end positions, and also during the displacement of the cable drum 2 from one end position to the other end position. Furthermore, the position of the cable pulleys 48 relative to the support structure 20 is also fixed.

[0061] The Figs. 16 and 18 are identical and show that the section of the respective rope 30 to 33 running from the rope drum 2 is tangential to the drum axis 3.

[0062] In the Fig. 19 to 22A further application of a cable winch arrangement 1 according to the invention is shown in a trash rack cleaning device 60. The trash rack cleaning device 60 serves to clean a trash rack 65 of a hydroelectric power plant (not shown in detail), for example in the area of ​​a dam of a hydroelectric power plant. The trash rack 65 is only indicated and, as is known, has a plurality of passage openings for water. Debris collects on the trash rack 65 and is separated from the water flowing through the passage openings. To collect the debris accumulated on the trash rack 65, the trash rack cleaning device 60 has a cleaning device 61, which can have a cleaning rake or a gripping tool. The trash rack cleaning device 60 is supported on rails 51 by means of chassis 52.

[0063] The rake cleaning device 60 has a drive 50 for moving a movable transport unit 54 of the rake cleaning device 60. The transport unit 54 could also be referred to as the chassis of the rake cleaning device 60, see. Fig. 20 In the exemplary embodiment, the traction drive 50 comprises a cable winch assembly 1 according to the invention, which is arranged on the transport unit 54. Two cables 30, 31 can be wound or are wound onto the cable drum 2 of the cable winch assembly 1, with one end of each cable 30, 31 being anchored to the cable drum 2. The ends of the cables 30, 31 remote from the cable drum 2 are anchored to opposing anchoring points of the hydropower plant (not shown).

[0064] In the exemplary embodiment, the travel drive 50 of the transport unit 54 has two cable pulleys 48 for deflecting the cables 30, 31 running from the cable drum 2 in opposite directions parallel to the longitudinal extension of the travel rails 51. The cable pulleys 48 are stationary with respect to the support structure 20.

[0065] A rotation of the cable drum 2 by means of the drum drive 9 simultaneously leads to the winding up of one of the cables 30, 31 and the unwinding of the other of the two cables 30, 31. As a result, the transport unit 54 is moved along the travel rails 51.

[0066] Deviating from the provisions in the Fig. 19 to 22 In contrast to the transport unit 54 of a screen cleaning device 60 shown in FIG. 1, the transport unit 54 could also be a trolley, for example of a crane, as shown in the Figs. 7, 8is shown. With the travel drive 50, it would then be possible to change the positioning of the trolley along the crane girder. In another embodiment of the invention, the crane 40 itself could also be displaceable along crane rails or, in the case of tires, along the ground by means of such a travel drive, in which case at least one of the crane's traveling gears would then have a travel drive with a cable winch arrangement.

[0067] In the Fig. 23 to 26 Another application of a cable winch assembly 1 according to the invention is shown in a rake cleaning device 60. The rake cleaning device 60 has a cleaning device 61 designed as a gripping tool and a drive assembly 62 for actuating the cleaning device 61. The drive assembly 62 comprises the cable winch assembly 1.

[0068] The cleaning device 61 is movable along the rake 65 in the vertical direction, see the double arrow in Fig. 23 drawn travel directions 71 of the cleaning device 61. The cleaning device 61 has a plurality of gripping arms 68 and a comb 69, wherein the gripping arms 68 are pivotable relative to the comb 69 about a pivot axis 72. In Fig. 23 Due to the side view, only one of the gripping arms 68 is shown. All gripping arms 68 are advantageously connected to one another in a rotationally fixed manner, ie the gripping arms 68 can be pivoted together about the pivot axis 72. In Fig. 23 An open state of the cleaning device 61 for receiving or releasing debris is shown in solid lines, and a closed position of the cleaning device 61 for gripping and holding the debris is shown in dashed lines. Such cleaning devices 61 are known per se.

[0069] The drive arrangement 62 comprises one of the cable winch arrangements 1 already explained for winding and / or unwinding three cables 30-32, cf. Fig. 24 . Furthermore, the drive arrangement 62 comprises two pulleys 63 for deflecting the ropes 30, 31 and a double pulley 64 for deflecting the rope 32 and a pulley 66 that is movable relative to the double pulley 64. The pulleys 63 and the double pulley 64 are stationary with respect to the support structure 20. The movable pulley 66 is stationary with respect to the support structure 20 with respect to a direction parallel to the drum axis 3. In the exemplary embodiment, the movable pulley 66 is movable relative to the double pulley 64 in a plane oriented orthogonally to the drum axis 3, as shown in Fig. 23 is shown schematically. The two end positions of the movable pulley 66, which is movable along a displacement path 67, are shown in solid and dashed lines, respectively.

[0070] The respective free end of the ropes 30, 31 is anchored to the cleaning device 61. The rope 32 runs from the rope drum 2 into a first rope groove of the double rope pulley 64 and out of the first rope groove in the direction of the rope pulley 66. The rope pulley 66 deflects the rope 32 into a second rope groove of the double rope pulley 64. From the second rope groove of the double rope pulley 64, the rope 32 is guided to the rake cleaning device 61. A deflection rope pulley 70 is arranged on the rake cleaning device 61 and deflects the rope 32 to an anchoring point on the gripping arms 68 (see FIG. Fig. 23 , 24 .

[0071] The rotation of the cable drum 2 of the cable winch assembly 1 results in a synchronous running of the cables 30, 31 and 32. This means that the cleaning device 61 can be easily adjusted in the vertical direction without causing the cleaning device 61 to run at an angle. Figs. 25, 26The rope discharge points 6 of the ropes 30 to 32 are, in the sense of the invention, essentially stationary with respect to the supporting structure 20. Regarding the design of the cable winch arrangement 1, reference is again made to the explanations for the Fig. 1 and 2 referred to.

[0072] By displacing the displaceable cable pulley 66 along the displacement path 67 relative to the double cable pulley 64, the free end of the cable 32 can be moved relative to the free ends of the cables 30, 31. Since the cable 32 is anchored to the gripping arms 68, the relative movement of the displaceable cable pulley 66 to the double cable pulley 64 leads to the pivoting of the gripping arms 68 between the above-mentioned states, i.e. the open state and the closed state of the cleaning device 61, by correspondingly lengthening or shortening the free cable length of the cable 32 anchored to the gripping arms 68, cf. Fig. 23 .

[0073] As already explained, the cleaning device 61 is in the Fig. 22 to 26 In the illustrated embodiment, the cleaning device 61 is displaceable in the vertical direction along the rake 65. In another embodiment, the rake 65 could be inclined by 45° to 85°, preferably by 60° to 80°, relative to a horizontal line. The travel directions 71 of the cleaning device 61 are then advantageously aligned parallel to the orientation of the inclined rake 65.

[0074] In a further variant, the Fig. 23-26 illustrated rake cleaning device 60 may additionally also have a travel drive 50, with which the rake cleaning device 60 can be displaced along rails 51, as is the case with the rake cleaning device 60 according to the Fig. 19-22is shown. This means that the rake cleaning device could then have two cable winch assemblies 1, wherein one of the cable winch assemblies 1 serves as the travel drive 50 and a second cable winch assembly 1 serves as the drive assembly 62 for actuating the cleaning device 61. legend to the reference numbers:

[0075] 1 Cable winch arrangement 34 Rope 2 rope drum 35 Rope 3 Drum axle 36 Rope 4 Drum shell 37 Rope 5 cavity 6 Rope payoff point 40 crane 7 Drum flange 41 container 8 storage rack 42 crane girder 9 Drum drive 43 trolley 10 groove 44 Load handling device 11 groove 45 Crane chassis 12 groove 46 Stayer 13 groove 47 trolley track 14 spindle drive 48 Rope pulley 15 spindle axis 49 crane rail 16 spindle 17 spindle nut 50 Drive 18 transmission gear 51 Running rail 19 spindle drive 52 chassis 20 supporting structure 54 transport unit 21 Rope passage 22 Support roller 60 Trash cleaning device 23 Distance 61 Cleaning device 62 Drive arrangement 30 Rope 63 Rope pulley 31 Rope 64 Double pulley 32 Rope 65 Rake 33 Rope 66 movable pulley 67 Displacement path 68 gripper arm 69 Comb 70 Deflection pulley 71 Travel directions 72 Swivel axis

Claims

1. A cable winch arrangement (1), which comprises at least one cable drum (2) mounted rotatably about a drum axis (3) for winding and / or unwinding at least one cable (30 - 37), and a supporting structure (20), and a lead screw mechanism (14) for displacing the cable drum (2) in relation to the supporting structure (20), wherein the lead screw mechanism (14) has a spindle (16) which extends along a spindle axis (15), and a cable run-off point (6) for the at least one cable (30 - 37), at which the cable (30 - 37) runs up and / or down tangentially from the cable drum (2), is at least substantially fixed in position in relation to the supporting structure (20), wherein the spindle axis (15) is arranged coaxially with the drum axis (3) of the cable drum (2), and wherein the cable drum (2) is rotatably mounted on a bearing frame (8) of the cable winch arrangement (1), and the bearing frame (8) together with the cable drum (2) is displaceable in relation to the supporting structure (20), characterised in that a spindle nut (17) of the lead screw mechanism (14) which engages in the spindle (16) is fastened in a torsionally fixed manner to the cable drum (2).

2. A cable winch arrangement (1) according to claim 1, characterised in that the spindle (16), at least in an end position, extends at least in part into a cavity (5) of the cable drum (2).

3. A cable winch arrangement (1) according to claim 1 or 2, characterised in that the spindle (16) has an external thread with a thread pitch, the thread pitch corresponding to at least the cable diameter of the at least one cable (30 - 37).

4. A cable winch arrangement (1) according to claim 3, characterised in that the cable drum (2) has a drum casing (4) with at least one spiral-shaped groove (10 - 13) for receiving at least one of the cables (30 - 37), with a thread pitch of the spiral-shaped groove (10 - 13) corresponding to the thread pitch of the external thread of the spindle (16).

5. A cable winch arrangement (1) according to one of claims 1 to 4, characterised in that the spindle (16) is fixed on the supporting structure (20) in a torsionally fixed manner and, at least in the axial direction in relation to the spindle axis (15), non-displaceably.

6. A cable winch arrangement (1) according to one of claims 1 to 4, characterised in that the lead screw mechanism (14) has a spindle drive (19) for rotating the spindle (16) in relation to the supporting structure (20).

7. A crane (40), in particular gantry crane, for transporting at least one container (41) or other load, wherein the crane (40) has at least one trolley (43) which is mounted movably on a crane girder (42) of the crane (40) and a load suspension device (44) for connecting to the container (41) or other load, wherein the load suspension device (44) is suspended from the trolley (43) so that it can be raised and lowered by means of cables (30 - 37) of the trolley (43), characterised in that the trolley (43) has at least one cable winch arrangement (1) according to one of claims 1 to 6 for winding and / or unwinding the cables (30 - 37) of the trolley (43).

8. A travelling drive (50) for displacing a transport unit (54) which can be moved along travelling rails (47), in particular a crane (40), or a trolley (43) mounted movably on a crane girder (42) of a crane (40), characterised in that the travelling drive (50) comprises at least one cable winch arrangement (1) according to one of claims 1 to 6, and the cable winch arrangement (1) is arranged on the transport unit (54).

9. A screen cleaning means (60) for cleaning a screen (65), in particular of a hydroelectric plant, wherein the screen cleaning means (60) has a cleaning device (61), in particular a cleaning rake or a gripping tool, for picking up flotsam accumulated on the screen (65), and a drive arrangement (62) for actuating the cleaning device (63), characterised in that the drive arrangement (62) comprises at least one cable winch arrangement (1) according to one of claims 1 to 6 and / or in that the screen cleaning means (60) is supported on travelling rails (51) and has a travelling drive (50) having a cable winch arrangement (1) according to one of claims 1 to 6 for moving the screen cleaning means (60) along the travelling rails (51).