CRANE AND CABLE DRUM UNIT FOR SAME

Abstract

A crane (2), more particularly a mobile fast-erecting crane, having at least one supply connection to which a supply line (16), more particularly a power cable, can be connected, wherein the supply line can be wound on a cable drum (15), which can be mounted on a drum mount (10) on the crane, with the cable drum being mounted to rotate on a drum support frame (18), which has running gear (18) for moving the cable drum over the ground and which has releasable mounting means, shaped to match the drum mount of the crane, for separably mounting the drum support frame on the drum mount of the crane. The invention further relates to a cable drum unit for winding a supply line (16) of a crane (2).

Claims

1. A crane having at least one supply connection to which a supply line is connectable, wherein the supply line is windable onto a cable drum that is fastenable to a drum mount of the crane, wherein the cable drum is rotatably supported at a drum bearing frame that has a chassis for moving the cable drum on the ground, and wherein the drum bearing frame is releasably attachable to the drum mount with a shape-matched connection.

2. The crane of claim 1, wherein the drum mount has a reception compartment that has a compartment opening through which the cable drum is pushable into the reception compartment together with the drum bearing frame and the chassis.

3. The crane of claim 2, wherein the reception compartment is parallelepiped-shaped, with the compartment opening extending flush up to a compartment bottom and forming an upright side opening of the reception compartment.

4. The crane of claim 2, wherein a cable drum unit is receivable by the reception compartment when the cable drum unit is in a horizontal stowing orientation that is tilted by approximately 90° with respect to a travel orientation standing on the ground, wherein the cable drum unit comprises the supply line, the cable drum, and the drum bearing frame, and wherein the reception compartment has a height that is smaller than a longitudinal extent of the reception compartment or less than 75° of the longitudinal extent of the reception compartment.

5. The crane of claim 1, wherein the drum bearing frame is insertable into the drum mount with an exact fit.

6. The crane of claim 5, wherein the chassis and the drum bearing frame are spreadable or tensionable by a weight force of the cable drum at the drum mount.

7. The crane of claim 1, wherein the drum bearing frame has a support section comprising two support arms that are spaced apart from one another, the support section forming a ground contact surface or mutually spaced apart ground contact points together with the chassis and extending on a side of the cable drum together with the chassis, the support section and an axis of rotation of the cable drum forming a triangle when viewing the cable drum in the direction of the axis of rotation, and wherein the axis of rotation extends above the chassis and the support section in a state supported on the ground between the chassis and the support section.

8. The crane of claim 7, wherein the reception compartment has a height, wherein the support section and a wheel or wheels of the chassis define a spread that is larger than the height of the reception compartment and that fits with an exact fit between a compartment bottom and a top of the reception compartment in a position of the spread tilted at an acute angle with respect to the vertical.

9. The crane of claim 1, wherein the drum bearing frame has a handlebar that extends on an oppositely disposed side of the cable drum relative to the chassis.

10. The crane of claim 9, wherein the handlebar and the chassis are offset toward the same side of the cable drum relative to an axis of rotation of the cable drum such that a connection line between the handlebar and the chassis forms a tangent at the cable drum.

11. The crane of claim 9 in accordance with one of wherein the drum bearing frame has a central bearing section at which the cable drum is rotatably supported and at which the chassis, the support arms, and the handlebar are rigidly supported.

12. The crane of claim 1, wherein the cable drum is rotatable with respect to the drum bearing frame via a drum drive.

13. The crane of claim 12, wherein the drum drive has a crank handle.

14. The crane of claim 12, wherein the drum drive has a coupling transmission preferably in the form of a chain drive or of a belt drive, and wherein the drum drive couples a drum axle transmission-wise with a wheel axle of the chassis so that the cable drum is rotationally drivable driven on a wheel rotation of the chassis.

15. The crane of claim 14, wherein the coupling transmission has a step-up ratio or a step-down ratio that is dimensioned such that a cable length unwound from or wound onto the cable drum corresponds to a travel distance covered by the chassis.

16. The crane of claim 1, wherein the supply line has a respective plug-in coupling at its two ends for coupling to the supply connection of the crane, on the one hand, and for coupling to a mains supply connection, on the other hand.

17. The crane of claim 1, wherein an undercarriage comprising a crane chassis bears a slewing platform that is rotatable about an upright axis and at which a tower and/or a boom is arranged, wherein a hoist rope runs off the boom, and wherein the drum mount is provided at the undercarriage.

18. A cable drum unit for winding up a supply line of a crane having a cable drum on which the supply line is windable and having a drum bearing frame at which the cable drum is rotatably supported, wherein the drum bearing frame has a chassis for moving the cable drum unit on the ground, and wherein the drum bearing frame is releasably attachable to a drum mount of the crane with a shape-matched connection for a releasable attachment of the cable drum unit to the crane.

19. The crane of claim 1, wherein the crane is a mobile fast-erecting crane.

20. The crane of claim 1, wherein the supply line is a power cable.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The invention will be explained in more detail in the following with reference to a preferred embodiment and to associated drawings. There are shown in the drawings:

[0036] FIG. 1: a schematic side view of a crane in the form of a mobile fast-erecting crane at whose undercarriage a reception compartment for a cable drum unit is provided.

[0037] FIG. 2: a perspective representation of the reception compartment of the mobile crane of FIG. 1 and of the cable drum unit received therein;

[0038] FIG. 3: a plan view of the cable drum unit that is stowed in the reception compartment of the crane and is seated, in particular tensioned, fit without clearance between its compartment bottom and compartment top;

[0039] FIG. 4: a perspective frontal view of the cable drum unit removed from the crane in a state placed on the ground; and

[0040] FIG. 5: a perspective representation of the cable drum unit similar to FIG. 4 that shows the drive shaft for the rotating drive of the drum.

DETAILED DESCRIPTION

[0041] The cable drum unit 1 shown in the Figures can form a crane equipping part for a mobile fast-erecting crane such as is shown in FIG. 1, but with the cable drum unit 1 also being able to be used for different crane types such as a revolving tower crane or a mobile telescopic boom crane or another construction crane.

[0042] As FIG. 1 shows, the crane 2 can comprise a tower 3 that can be supported on a slewing deck 4 that is seated on an undercarriage 5 and can be rotated about an upright axis of rotation by means of a slewing gear drive.. Said undercarriage 5 can be travelably configured as a truck or in another manner and can comprise a crane chassis 6 that can be configured as multiaxial and can have at least one driven axle. The crane 2 can, however, optionally also have a fixedly anchored or supported support base.

[0043] Said tower 3 can be telescopic and/or downwardly luffable to be able to be moved around a horizontal transport position. In its upright operating position, the tower 3 supports a boom 7 that can optionally be moved in different luffing positions, as FIG. 1 shows. A hoist rope 8 having a load hook fastened thereto can be let down from the boom 7 and can be raised by means of a hoisting gear drive. The hoist rope 8 can optionally run off over a trolley 9 that can be traveled at the boom 7 by means of a trolley travel drive.

[0044] The crane 2 can have different electrical units, as initially explained.

[0045] As FIGS. 2 and 3 show, a drum mount 10 is provided at the undercarriage 5 of the crane 2 to receive the cable drum unit 1, with said drum mount 10 in particular being able to comprise a reception compartment 11 in which the cable drum unit 1 can be stowed, in particular pushed or driven in, cf. FIGS. 2 and 3.

[0046] Said reception compartment 11 can be adapted to the external dimensions of the cable drum unit 1, with the reception compartment 11 being dimensioned sufficiently large to be able to receive the cable drum unit 1 in its totality. On the other hand, the reception compartment 11 is only formed as so large or so small that the cable drum unit 1 can then be fit or can be clamped thereto without clearance.

[0047] Said reception compartment 11 can be configured to receive the cable drum unit 1 in a lying orientation that is tilted by approximately 90° with respect to the travel position placed on the ground, cf. comparison FIG. 3 in comparison with FIG. 4.

[0048] Said reception compartment 11 can be configured as parallelepiped-shaped overall and can have an open longitudinal side through which the cable drum unit 1 can be traveled into the reception compartment 11, with said side opening 12 being able to take up the whole compartment side or being able to extend down to the compartment bottom 13 to be able to simply push in the cable drum unit 1. A cover not shown in FIG. 2 or a door can close the side opening 12.

[0049] As FIGS. 4 and 5 show, the cable drum unit 1 comprises a cable drum 15 for winding up and unwinding a supply line 16 that can be provided with a connection plug 27 at its two ends to connect the supply line 16 to the crane 2, on the one hand, and to a supply system or a supply source, on the other hand.

[0050] The cable drum 15 is here rotatably supported at a drum bearing frame 18 to which a chassis 19 is attached so that the cable drum unit 1 forms a trolley and is travelable at the ground. Said chassis 19 can advantageously be formed monoaxially and comprise two pneumatic-tired wheels 20 whose track width can advantageously exceed the widths of the cable drum 16 to make possible a stabile support and a compact construction.

[0051] The drum bearing frame 18 can have a central bearing section 21 at which the cable drum 15 is rotatably borne.

[0052] Said chassis 18 can be supported by two chassis struts with respect to said bearing section 21, cf. FIG. 5.

[0053] The drum bearing frame 18 advantageously furthermore comprises a support section 22 that can bear the cable drum unit 1 at the ground when the chassis 19 of the cable drum unit 2 stands on the ground, cf. FIG. 4 and FIG. 5. Said support section 22 can here be formed by two support arms 23 that can be supported at the chassis 19 and/o at the central bearing section 21, with the two support arms 23 being able to comprise, for example, two support sides bent in V shape that are supported at the central bearing section 21, on the one hand, and at the chassis 19, on the other hand, and that project from the chassis 19 toward one side of the cable drum 15, cf. FIGS. 4 and 5.

[0054] If the cable drum unit 1 is observed in the direction of the axis of rotation 24 of the cable drum 15, the wheels 20 of the chassis 19 and of said support section 22 of the drum bearing frame 18 are arranged on the same side of the cable drum 25, but spaced apart from one another here so that the wheels 20, the support section 22 and the axis of rotation 24 of the drum form a triangle. The axis of rotation 24 and thus the center of gravity of the cable drum 15 in particular approximately extend centrally above the ground contact surface or the ground contact points that are defined by the wheels 10, on the one hand, and by the support section 22, in particular the support arms 23, on the other hand. The cable drum unit 1 hereby stands on the ground in a stable form when it is not traveled.

[0055] The support arms 23 in the embodiment drawn form support blades or runners that stand on the ground when the cable drum unit 1 is not traveled. Alternatively, said support sections 22 or the support arms 23 could, however, also bear a further chassis axle having further wheels to support the cable drum unit 1 on two mutually spaced apart chassis axles.

[0056] As FIGS. 4 and 5 show, the drum bearing frame 18 further comprises a handlebar 25 that is arranged at an oppositely disposed side of the cable drum 15 with respect to the wheels 20 and the support arms 23 and can be rigidly connected to the central bearing section 21. The handlebar 25 can in particular be formed by a handlebar hoop that is U-shaped overall and that projects obliquely upwardly from the central bearing section 21 at both sides of the cable drum 15.

[0057] If the cable drum unit 1, as shown in FIGS. 4 and 5, on the chassis 19 and optionally on the support arms 23 stands on the ground, said handlebar 25 extends above the cable drum 15 approximately at the stomach level or chest level of an operator to be able to simply travel the unit. The handlebar 25 can advantageously extend in the alignment standing on the ground, as is shown in FIGS. 4 and 5, together with the wheels 20 toward one side of the cable drum 15 so that an imaginary connection line between the handlebar 25 and the wheels 20 can approximately form a tangent at the cable drum 15.

[0058] Due to the geometry, in particular the positioning and spacing of the support arms 23, of the chassis axle of the chassis 18, and of the handlebar 25, the center of gravity of the cable drum 15 in the state supported on the ground, in which the support arms 23 also contact the ground, is disposed, viewed from the handlebar 25, slightly in front of the wheels 20 or slightly in front of the chassis axle so that the weight of the cable drum 15 attempts to tilt the unit slightly forward with respect to the chassis 19 and some of the weight rests on the support arms 23. If, however, the drum bearing frame 18 tilts slightly rearwardly at the handlebar 25 so that the support arms 23 rise from the ground, the center of gravity of the cable drum 15 moves approximately perpendicular above the chassis axle of the chassis 19 so that the greater portion of the drum weight rests on the chassis 19 and the operator does not have to apply any high forces.

[0059] As in particular FIG. 3 shows, the geometry of the drum bearing frame 18 is adapted to the reception compartment 17 such that the cable drum unit 1 fits into the reception compartment 17 with an exact fit when lying. In this process, the support section 22 and/or the support arms 23 can extend from the chassis 19, when it stands on the compartment bottom 13, slightly obliquely away from the cable drum 15 upward to the cover 14 of the reception compartment 11 and can abut it. Since the center of gravity of the cable drum 15 is not above the chassis axle 9, but rather spaced apart therefrom, the drum bearing frame 18 rotates for so long until the support section 22, in particular the support arms 23, abut the top 14 and/or the handlebar 25 at the compartment bottom 13 so that the drum bearing frame 18 tensions in the reception compartment 11, at least contacts it without clearance.

[0060] Further fastening means can be provided for securing, for example latching elements such as latching clips that latch the handlebar 25 and into which the handlebar 25 can be clipped. Alternatively or additionally, tensioning elements such as tensioning belts or tensioning levers or clips, or also adjustable fastening elements such as screw clips can be provided to also hold the cable drum unit 1 securely in the drum mount 10 in a travel operation subject to shocks.

[0061] As FIG. 2 shows, a cable deflector 26 can be provided at the crane 2, in particular at the crane mount 10, that can advantageously extend at a position that faces the chassis 19 and/or the support arms 23 in the position fastened to the crane. The cable deflector 26 can in particular be arranged at a reception compartment side of the reception compartment 11 that faces the chassis 19 and the support frame 23.

[0062] The cable deflector 26 can, for example, comprise a plurality of deflection pulleys 27 that can be arranged pair-wise spaced apart from one another in upright and horizontal positions to be able to deflect the cable to be unwound in different directions.

[0063] The cable drum 15 can be rotated relative to the drum bearing frame 18 by a drum drive 28. As FIGS. 3 and 5 show, such a drum drive 28 can, for example, comprise a crank handle 29 that can be rotationally fixedly fastenable to a drum shaft 30.

[0064] Alternatively or additionally, the drum drive 28 can also comprise a coupling of the drum shaft 30 with one or both wheels 20 of the chassis 19. The drum drive 28 can, for example, comprise a chain drive or a belt drive, with a drive pinion or a drive plate being able to rotationally fixedly fastened to the drum shaft 30 and with a second drive pinion or drive plate being able to be rotationally fixedly fastened to one of the wheels 20. The two pinions or the two drum plates are here advantageously coordinated with one another with respect to their revolution diameters such that the cable drum 15 rotates so fast on the travel of the cable drum while rotating the wheels 20 that the distance covered by the chassis 19 approximately corresponds to the cable length unwound or wound up.