Pivot formed crane element for component mounting crane

Abstract

A crane element (1) for a pivotally formed rotating part of a component-mounted crane, comprising a framework (2) on which are mounted: a motor-driven orientation system (3) comprising a pivot mechanism about an orientation axis and at least one orientation electric motor (30) cooperating with the pivot mechanism to pivot the framework about the orientation axis; a hoisting winch (4) provided with a hoisting electric motor (40) cooperating with a hoisting drum (41) about which a hoisting rope is wound; a distribution winch (5) provided with a distribution electric motor (50) cooperating with a distribution drum about which a distribution rope is wound.

Description

Crane elements formed by pivots for component mounting cranes Technical Field

[0001] The present invention relates to a crane element for pivot formation of the rotating part of an element-mounted crane. Background Technology

[0002] This type of pivot-formed crane element, commonly referred to as a "pivot," forms the crane by pivoting at the top of the mast and carrying the cantilever. A distribution trolley moves along this cantilever, which in turn supports a lifting trolley on which the load to be moved is hooked. The cantilever and mast are also composed of multiple elements assembled together. Where appropriate, this pivot-formed crane element can also carry a counterweight cantilever, another element forming the crane, which typically supports one or more counterweights.

[0003] Component-mounted cranes, such as top-slewing cranes, offer numerous advantages, including adaptability to various working environments, whether at high-altitude, heavy-duty, or spacious construction sites, as well as a wide range of motion for lifting and distributing heavy loads.

[0004] Traditionally, many functional components (winches and motors, command / control units, safety devices, sensors, etc.) are integrated into different structural elements of a crane, including a lifting winch (which forms the first element of the cantilever mounted on the pivot) typically mounted on the reverse cantilever forming the crane element or on the cantilever outrigger forming the crane element, a distribution winch traditionally mounted on the cantilever outrigger forming the crane element, and a motor-driven orientation system mounted on the pivot forming the crane element.

[0005] For example, document EP 0 635 450 A1 describes a component-mounted crane in which both the lifting winch and the distribution winch are mounted on crane components formed by cantilever legs.

[0006] These functional components are installed in the factory onto the structural elements of the crane to form crane components with one or more functions. These crane components are considered equivalent to packages, which are then transported, handled, and assembled on the construction site to form the mast and rotating parts of the crane (pivots, cantilever arms, and possibly counterbalance cantilever arms).

[0007] Therefore, the number of mechanical interfaces is high because each motor unit (motor-driven orientation system, lifting winch, and distribution winch) is equipped with its own support to hold and guide the mechanical and electromechanical components that make it up, and the support is provided with mounting and setting interfaces for mounting it on the relevant structural elements.

[0008] Furthermore, the dispersion of functional components across different structural elements, and consequently the distance between these components, increases the number of mechanical interfaces (e.g., threaded, shaft-aligned, or pin-aligned interfaces) and electrical interfaces (e.g., connectors, electrical sockets, or other electrical connections) required to mechanically and electrically connect the functional components to each other. It also increases the size and length of cables used for connections to command / control units, particularly for sensors and motor power supplies. Moreover, this dispersion of functional components complicates the assembly of crane components and prolongs assembly time, as it requires ensuring electrical connections between crane components in addition to mechanical and structural connections.

[0009] Furthermore, this modular, traditional architecture has limitations in terms of manufacturing logistics, the large number of parts to be supplied, the operation of setting up, installing and connecting functional components, the amount of materials used, especially copper for cables, installation / removal operations, and ultimately, the reliability issues arising from the increased number of parts and interfaces.

[0010] The teachings of document DE 35 10 116 A1 or its French equivalent FR 2 565 950 A1 also illustrate the state of the prior art, suggesting that the lifting winch and the distribution winch be mounted on a portion of the cantilever to form a cantilever outrigger fixed to the pivot, with the distribution winch positioned above the lifting winch, which in turn is positioned above the distribution trolley. This solution thus allows the two winches to be combined and fixed to the pivot portion, but it has proven to be largely unsuitable because when the distribution trolley is located at the cantilever outrigger, the two winches are positioned directly above the distribution trolley, which restricts cable routing. Summary of the Invention

[0011] The present invention aims to address all or part of the above-mentioned disadvantages by considering reducing the number of mechanical and electrical interfaces between different crane components of a component-mounted crane.

[0012] Another object of the present invention is to provide a solution to simplify the installation of lifting winches and distribution winches, including the routing of the associated lifting ropes and distribution ropes.

[0013] Therefore, the present invention provides a crane element for pivot formation of the rotating portion of a component-mounted crane, the pivot-formed crane element comprising a frame on which:

[0014] A motor-driven orientation system includes a pivot mechanism about an orientation axis and at least one orientation electric motor cooperating with said pivot mechanism to pivot the frame about the orientation axis;

[0015] A lifting winch is equipped with a lifting electric motor that works in conjunction with a lifting drum, and lifting ropes are wound around the lifting drum.

[0016] The distribution winch is equipped with a distribution electric motor that works in conjunction with the distribution drum, and the distribution rope is wound around the distribution drum.

[0017] The frame includes a frame and trusses projecting from the frame to form a cantilever bracket, wherein all motor-driven orientation systems, lifting winches, and distribution winches are mounted on the frame; and the frame has:

[0018] The central section houses a motor-driven orientation system and a truss; and

[0019] The front section extends the central section forward beyond the truss, and the lifting winch and distribution winch are mounted on the front section.

[0020] The notable feature of the crane element formed by the pivot is that the front portion includes an upper base on which the lifting winch is mounted, and a distribution winch is mounted on the lower side of the upper base, thereby positioning the lifting winch above the distribution winch.

[0021] Therefore, this invention proposes mounting the three main motor groups of the crane (motor-driven orientation system, lifting winch, and distribution winch) on a frame of crane components formed by a pivot, thereby allowing for a minimum number of electrical interfaces. This saves time during factory manufacturing, particularly for installation and wiring operations, and also saves time and facilitates the assembly of crane components on the construction site. This invention also allows for increased crane reliability and reduced failure risk, particularly humidity-related failure risk, due to the need for fewer cable connections.

[0022] Furthermore, this invention allows for electrical testing of the three motor assemblies in the factory and directly on the crane components formed at the pivot, without having to assemble the crane, even partially, which makes defect or fault detection testing reliable. In other words, this invention allows for final testing of the wired motor assemblies in the final version, thereby reducing reliability issues during the initial startup of a new crane.

[0023] Another objective of this invention is to reduce the number of parts to be manufactured, such as the motor assembly supports and their interfaces, as well as the sockets for connection to the command / control unit, and also to reduce the number of cables to be installed.

[0024] The present invention also allows for the design of a pivot-formed crane element frame that receives three main motor groups. This allows for the machining of different surfaces or supports (bearings, bearing surfaces, etc.) on the same frame in a single operation. This is necessary for the three motor groups, which allows for the avoidance of a considerable number of operations and setups required in traditional modular architectures, not to mention reducing the number of critical high-precision dimensions.

[0025] Furthermore, maintenance of the three motor units becomes easier because it is no longer necessary to climb the crane components formed by the cantilever outriggers to access the distribution winch or the lifting winch, or climb the crane components formed by the counterbalance cantilever to access the lifting winch. Therefore, the distribution winch and the lifting winch can be accessed via a Class 1 access route (crane operator access route) without the need for wiring harnesses, making maintenance easier and saving time.

[0026] Furthermore, the positioning of the distribution winch on the pivot-formed crane element (instead of the cantilever-formed crane element in the conventional case) allows for a reduction in the self-weight on the cantilever-formed crane element and thus an increase in the effective load, which contributes to the improvement of the crane's load curve.

[0027] It should be noted that the arrangement of the lifting winch and the distribution winch, one above the other, is particularly advantageous in terms of compactness. Furthermore, by placing the distribution winch below the lifting winch, it replaces the steering pulley for the distribution cable, which is typically located at the cantilever outriggers of a conventional crane. Therefore, this arrangement allows for the removal of pulleys on the distribution cable route and ensures that the distribution cable departs (from both the front and rear sides of the trolley) in the same direction (forward).

[0028] Furthermore, it is possible to determine and machine all the necessary dimensions for the three motor units (motor-driven orientation system, lifting winch, and distribution winch) on the same frame, thus allowing for easy and reliable manufacturing.

[0029] In addition, the lifting winch and distribution winch are located in the front part of the frame, while the motor-driven orientation system and truss are located in the central part, thus allowing for advantageous compactness.

[0030] In one embodiment, the front portion of the frame has no tracks for distributing the trolley, and therefore the front portion does not constitute a cantilever element.

[0031] In other words, the pivot-formed crane element does not integrate any cantilever element or part that can support the distribution trolley. Therefore, in any case, the crane winch and distribution winch are not supported on the cantilever element (or the cantilever outrigger forming part), but only on the pivot-formed crane element, and are therefore necessarily far away from the distribution trolley, regardless of the position of the distribution trolley.

[0032] According to another possibility, the truss supports the top attachment of the cantilever, and the front part of the frame supports the lower attachment of the cantilever.

[0033] Therefore, in the assembled crane, the cantilever is secured to the truss at the level of the top cantilever attachment and to the front part of the frame at the level of the lower cantilever attachment.

[0034] In certain embodiments, the lifting drum and the distribution drum can rotate about parallel or substantially parallel axes.

[0035] In the context of this invention, "substantially parallel" axes should be understood as axes that are inclined relative to each other at an angle of less than or equal to 10°.

[0036] Advantageously, the truss supports the upper rope steering system, such as, for example, the upper pulley, which is located above and behind the lifting winch for the first steering of the lifting rope, and the front part of the frame supports the lower rope steering system, such as, for example, the lower pulley, which is located below and behind the lifting winch for the second steering of the lifting rope.

[0037] This architecture is advantageous because it allows the lifting rope to pass over the distribution winch without any obstruction.

[0038] In an advantageous embodiment, at least one of the upper rope steering system and the lower rope steering system is coupled to a load measuring sensor to measure the load at the horizontal position of the lifting rope.

[0039] Therefore, due to these rope steering systems, it is possible to integrate such load measurement sensors onto the crane element formed by the pivot, thereby adding new functionality at the horizontal level of the element and thus helping to further reduce the number of interfaces.

[0040] In a particular embodiment, the frame has a rear portion that causes the central portion to extend rearward beyond the truss, and the truss supports the top attachment of the balance cantilever, while the rear portion of the frame supports the lower attachment of the balance cantilever.

[0041] Therefore, in the assembled crane, the counterweight boom is secured to the truss at the level of the top attachment of the counterweight boom and to the rear part of the frame at the level of the lower attachment of the counterweight boom.

[0042] According to one possibility, the frame has at least one first bearing and at least one second bearing, with the lifting drum rotatably mounted on the first bearing and the distribution drum rotatably mounted on the second bearing.

[0043] In other words, the two bearings are supplied and machined directly on the frame, which allows for fewer mechanical interfaces and almost all necessary machining operations to be performed on the same part, i.e., the frame.

[0044] The invention also relates to a feature in which the pivot-formed crane element includes an electrical device mounted on a frame, the electrical device integrating at least one command / control unit, a power interface for plugging in a power source, and a cable network connecting the command / control unit and the power interface to a directional electric motor, a lifting electric motor, and a distribution electric motor.

[0045] Therefore, the pivot-formed crane element integrates an electrical device in which the command / control unit resides on the frame and is directly connected to three motor groups (motor drive orientation system, lifting winch, and distribution winch), reducing electrical interfaces, cable length, electrical installation time, and facilitating electrical maintenance.

[0046] Furthermore, in this version, the invention allows for the manufacture in a factory and directly on the crane element formed on the pivot, not only of the wired motor assembly, but also of the aforementioned electrical assembly, which includes at least a command / control unit, a power interface, and a cable network, and may also include sensors or safety devices, as described below (anemometer, crane safety device, distribution safety device).

[0047] According to one possibility, the pivot-formed crane element includes at least one anemometer mounted on the frame, which directly adds another function to the pivot-formed crane element.

[0048] According to one variation, a lifting safety device, such as a top or bottom travel end, is installed on the lifting winch to ensure the travel of the lifting rope.

[0049] According to one variation, a distribution safety device, such as a front or rear travel end, is installed on the distribution winch to ensure the travel of the distribution rope.

[0050] Whether it's an anemometer, lifting safety device, or distribution safety device, each is designed to connect to the crane's command / control unit. Furthermore, if the command / control unit exists on the pivot-formed crane component as described above (or on the transportable package as described below), the wiring between these devices and the command / control unit will be easy and reliable because it is direct.

[0051] In a particular embodiment, the pivot mechanism includes a fixed pivot and a rotating pivot, the fixed pivot being used to securely fasten to the top of the mast, and the rotating pivot being rotatably connected to the fixed pivot about an directional axis.

[0052] According to one possibility, the fixed pivot includes a gear-driven directional crown, the rotating pivot has an annular support surface disposed on the lower side of the frame and supported on the directional crown, and at least one directional electric motor is provided with a pinion that meshes with the directional crown.

[0053] The present invention also relates to a transportable package for the rotating part of a component-mounted crane, the transportable package comprising:

[0054] A crane element formed by a pivot according to the present invention, and

[0055] The main crane element, selected from crane elements formed by a balanced cantilever and crane elements formed by cantilever legs, is fastened to the frame of a crane element formed by a pivot.

[0056] According to one possibility, the main crane components are securely fastened to the frame of the crane components formed by the pivot, for example, by welding.

[0057] Therefore, it is possible to form a transportable package including a crane element formed by a pivot, with the crane element formed by a cantilever secured to the pivot-formed crane element (e.g., permanently, particularly by welding), or alternatively, to form a transportable package including a crane element formed by a pivot, with the crane element formed by a cantilever leg secured to the pivot-formed crane element (e.g., permanently, particularly by welding).

[0058] Therefore, depending on either of the two possibilities, this transportable package can be assembled, equipped, wired, and tested directly on the ground in the factory before being loaded and transported along with other components, such as mast components and cantilever components.

[0059] The advantage of a transportable package that includes a crane element formed by a pivot is that a crane element formed by a cantilever leg is fastened to the pivot-formed crane element. This advantage potentially enables the distribution trolley to be set on the ground and thus improves the ergonomics and safety of the operation of installing the distribution trolley and passing through the lifting ropes.

[0060] In an advantageous embodiment, the transportable package includes an electrical assembly mounted on the main crane and integrating at least one command / control unit, a power interface for plugging in a power source, and a cable network connecting the command / control unit and the power interface to the directional electric motor, the lifting electric motor, and the distribution electric motor.

[0061] Therefore, this embodiment is a variation of the foregoing embodiments, wherein the electrical assembly is mounted on the frame of the crane element formed by the pivot. However, this embodiment has the same advantage in that it allows for final testing not only of the wired motor assembly but also of the electrical assembly, which includes at least a command / control unit, a power interface, and a cable network, as well as sensors or safety devices, as described above, both in the factory and directly on the transportable packaging (before its shipment).

[0062] The present invention also relates to a transportable package as described above, and further includes an auxiliary crane element selected from crane elements formed by a balancing cantilever and crane elements formed by cantilever legs, and not a main crane element, the auxiliary crane element being detachably fastened to the frame of a crane element formed by a pivot.

[0063] The present invention also relates to an element-mounted crane comprising a rotating portion and a mast as described above, the mast having a top on which a frame of crane elements formed by a pivot is mounted.

[0064] According to one possibility, component-mounting cranes include:

[0065] A cantilever, which has a crane element formed by cantilever legs fastened to a frame of a crane element formed by a pivot;

[0066] A distribution trolley, which is suspended on the cantilever and connected to the distribution winch (as a reminder, mounted on the crane element formed by the pivot) via a distribution rope, is used to distribute the movement of the trolley along the cantilever in opposite forward and backward directions;

[0067] A pulley, which is suspended from a distribution trolley by a lifting rope connected to a lifting winch (as a reminder, mounted on a crane element formed by a pivot), is used for the raising and lowering of the pulley. Attached Figure Description

[0068] Other features and advantages of the present invention will become apparent upon reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings, in which:

[0069] Figure 1 is a schematic perspective top view of the frame of a crane element formed by a pivot according to the present invention;

[0070] Figure 2 is a schematic perspective bottom view of the framework in Figure 1;

[0071] Figure 3 is a schematic perspective top view of a pivot-formed crane element according to the present invention, including the frame of Figures 1 and 2, as well as a lifting winch and a distribution winch, wherein the crane element formed by the balancing cantilever is securely fastened to the frame of the pivot-formed crane element.

[0072] Figure 4 is a schematic perspective top view of the crane element formed by the pivot in Figure 3;

[0073] Figure 5 is a schematic perspective top view of the pivot-formed crane element of Figures 3 and 4, wherein the crane element formed by the counterweight cantilever is securely fastened to the frame of the pivot-formed crane element, and wherein the crane element formed by the cantilever leg is detachably fastened to the same frame.

[0074] Figure 6 is a schematic side view of the crane element formed by the pivots of Figures 3 to 5;

[0075] Figure 7 is a schematic side view showing the passage of lifting ropes in the crane element formed by the pivots of Figures 3 to 6;

[0076] Figure 8 is a schematic perspective top view of the framework of Figures 1 and 2, on which crane elements formed by the balancing cantilever are securely fastened to form a transportable package. Detailed Implementation

[0077] Referring to Figures 3 and 4, a pivot-formed crane element 1 according to the invention is provided for the rotating portion of an element-mounted crane, and the pivot-formed crane element 1 includes a frame 2 integrating a frame 6 and a truss 7 projecting upward from the frame 6 to form a cantilever bracket, and the pivot-formed crane element 1 further includes the following systems mounted on the frame 2:

[0078] The motor-driven orientation system 3 includes a pivot mechanism 31 about an orientation axis Z and at least one orientation electric motor 30 cooperating with the pivot mechanism 31 to pivot the frame 2 about the orientation axis Z;

[0079] The lifting winch 4 is equipped with a lifting electric motor 40 that cooperates with the lifting drum 41, and the lifting rope 42 is wound around the lifting drum; and

[0080] A distribution winch 5 is provided with a distribution electric motor 50, which cooperates with a distribution drum 51, and a distribution rope 52 is wound around the distribution drum.

[0081] Once the component-mounted crane is installed, the latter includes:

[0082] The rotating section includes a crane element 1 formed by a pivot, a crane element 8 formed by cantilever legs, and a crane element 9 formed by a counterbalance cantilever. The crane elements 8 and 9 are fastened to the frame 2 on each side of the truss 7. The rotating section also includes cantilever elements (not shown) continuously assembled onto the crane element 8 to form a cantilever.

[0083] The mast 20 (shown schematically only in Figure 7) has a top on which the frame 2 of the crane element 1, formed by a pivot, is mounted so that the rotating part can rotate about the directional axis z.

[0084] Therefore, the rotating part of the component-mounted crane includes a crane element 8 formed by cantilever legs and a cantilever formed by assemblies of the crane element, the crane element 8 being fastened to the frame 2 of the crane element 1 being pivotally formed. Furthermore, a distribution trolley (not shown) is provided, suspended from the cantilever and connected to a distribution winch 5 via a distribution rope 52, for moving the distribution trolley along the cantilever in opposite forward and backward directions. A pulley (not shown) is also provided, suspended from the distribution trolley by a lifting rope 42 connected to the lifting winch 4, for lowering and raising the pulley. As shown in FIG. 5, it is also possible to mount the control compartment 10 on the frame 2 of the crane element 1 being pivotally formed. Additionally, one or more counterweights (not shown) are mounted on the crane element 9 being balanced by the cantilever legs.

[0085] Referring to Figure 2, the pivot mechanism 31 includes a fixed pivot 32 and a rotating pivot 33. The fixed pivot 32 is used to securely fasten to the top of the mast 20, and the rotating pivot is rotatably connected to the fixed pivot 32 about a directional axis z. The fixed pivot 32 includes a gear-driven directional crown, and the rotating pivot 33 has an annular support surface disposed on the underside of the frame 2 and supported on the directional crown. At least one directional electric motor 30 is provided with a pinion gear that meshes with the directional crown.

[0086] Referring to Figures 1 and 2, the frame 6 of the structure 2 of the pivot-formed crane element 1 has:

[0087] The central section 60 is equipped with a motor-driven orientation system 3 and a truss 7; and

[0088] The front portion 61 extends the central portion 60 forward beyond the truss 7, and the lifting winch 4 and the distribution winch 5 are mounted on this front portion; and

[0089] The rear portion 62 causes the central portion 60 to extend rearward beyond the truss 7.

[0090] Truss 7 includes:

[0091] Beams 70, which project upwards from frame 6, each beam including a lower end fixed to frame 6 and an opposite upper end,

[0092] The upper end of the beam 70 is securely fastened to the superstructure 71.

[0093] Truss 7 supports the cantilever top attachment 73, and the front portion 61 of frame 6 supports the cantilever lower attachment 63. These attachments are designed to enable the crane element 8 formed by the cantilever legs to be attached top and bottom to the frame 2 of the pivotally formed crane element 1. The cantilever top attachment 73 is disposed on the upper structure 71 of truss 7.

[0094] Truss 7 supports the top attachment 74 of the balance cantilever, and the rear portion 62 of frame 6 supports the lower attachment 64 of the balance cantilever, which is used to enable the crane element 9 formed by the balance cantilever to be attached at the top and bottom to the frame 2 of the crane element 1 formed by the pivot. The top attachment 74 of the balance cantilever is provided on the upper structure 71 of truss 7.

[0095] In the illustrated embodiment, it is clear that the front portion 61 of the frame 6 does not have a track for the distribution trolley, and therefore does not constitute a cantilever element. In other words, the distribution trolley cycles along the cantilever, particularly along the crane element 8 formed by the cantilever legs, between the cantilever leg limit position on the crane element 8 formed by the cantilever legs and the cantilever end limit position at the end of the cantilever, while the distribution trolley cannot cycle on the front portion 61 of the frame 6.

[0096] In the first embodiment shown in Figures 3 to 5 and Figure 8, the crane element 8 formed by the cantilever legs is detachably fastened to the frame 2, while the crane element 9 formed by the balance cantilever is securely fastened to the frame 2 by welding. Therefore, the crane element 1 formed by the pivot and the crane element 9 formed by the balance cantilever together form a transportable package that, during the assembly of the component-mounted crane, is assembled onto a mast 20 formed by assemblies of multiple mast elements, and then onto the crane element 8 formed by the cantilever legs, which is in turn assembled onto the cantilever elements to form a cantilever. Figure 8 illustrates this transportable package, showing only the frame 2 of the crane element 1 formed by the pivot.

[0097] In this first embodiment, the cantilever top attachment 73 is, for example, in the form of a bracket designed for attachment to the top of the crane element 8 formed by the cantilever legs via a connecting pin 80 capable of installation / removal. The cantilever lower attachment 63 includes two hooks adapted to receive a connecting shaft 64 for assembly at the lower frame 2 and the crane element 8 formed by the cantilever legs, and is also capable of installation / removal.

[0098] In a second embodiment (not shown), the crane element 9 formed by the balance cantilever is detachably fastened to the frame 2, while the crane element 8 formed by the cantilever legs is securely fastened to the frame 2 by welding. Thus, in this variant, the crane element 1 formed by the pivot and the crane element 8 formed by the cantilever legs together form a transportable package that, during the assembly of the component-mounted crane, will be assembled onto the mast 20 formed by the assembly of multiple mast elements, onto the crane element 9 formed by the balance cantilever, and onto the cantilever elements to form the cantilever.

[0099] The front portion 61 of the frame 6 includes an upper base 65 on which the lifting winch 4 is mounted, and a distribution winch 5 is mounted below the upper base, such that the lifting winch 4 is positioned above the distribution winch 5. Furthermore, the frame 2 is securely fastened to the upper base 65 as follows:

[0100] Two first bearings 66 are mounted on the upper base 65, on which the lifting drum 41 is rotatably mounted.

[0101] Two second bearings 67 are mounted on the underside of the upper base 65, on which the distribution roller 51 is rotatably mounted.

[0102] It should be noted that the lifting drum 41 and the distribution drum 51 can rotate about a parallel axis perpendicular to the orientation axis z. Furthermore, to ensure that the movement of the lifting rope 42 is not obstructed by the movement of the distribution rope 52, and vice versa, the truss 7 supports the upper rope steering system 78, such as an upper pulley, located above and behind the lifting winch 4 for the first steering of the lifting rope 42. The front portion 61 of the frame 6 supports the lower rope steering system 68, such as a lower pulley, located below and behind the lifting winch 4 for the second steering of the lifting rope 42.

[0103] Therefore, the lifting rope 42 has a rear strand 420 extending between the upper rope steering system 78 and the lower rope steering system 68 at the rear of the lifting winch 4. As shown in FIG7, a front rope steering system 88 is also provided on the crane element 8 formed by the cantilever outriggers. This system is located above and in front of the lifting winch 4, such that the lifting rope 42 passes continuously from the lifting drum 41 through the front rope steering system 88, the upper rope steering system 78, then the front rope steering system 88 again, the distribution trolley, and the pulley.

[0104] Advantageously, at least one upper rope steering system 78 and a lower rope steering system 68 are coupled to a load measuring sensor (not shown) to measure the load at the horizontal position of the lifting rope 42; this function is thus integrated into the crane element 1 formed by the pivot.

[0105] Although not shown, it is advantageous that the pivot-formed crane element 1 also includes an electrical assembly mounted on the frame 2 (preferably in an electrical cabinet) and integrating at least one command / control unit, a power interface for plugging in a power source, and a cable network connecting the command / control unit and the power interface to the directional electric motor, the lifting electric motor, and the distribution electric motor. The command / control unit is also connected to control devices (not shown) for pilot-controlled movement of the crane, particularly control devices located in the control compartment 10 and / or alternating remote control devices or radio control devices.

[0106] In one variant, the electrical assembly is mounted on a main crane element selected from crane element 9 formed by a counterbalanced cantilever and crane element 8 formed by cantilever legs, to form a transportable package together with crane element 1 formed by a pivot. Therefore, in the example shown in Figure 5, the electrical assembly is mounted on crane element 9 formed by a counterbalanced cantilever within an electrical cabinet 90.

[0107] This command / control unit executes:

[0108] The input terminal receives signals for controlling the crane's motion, such as lifting, rotation, distribution, and translation from the control device, and also receives signals at the input terminal from various sensors (such as position sensors, load measurement sensors, such as those described above, sensors for measuring the brake state associated with all or part of the crane's motion, sensors for measuring the levelness of a portion of the crane, such as inclinometers, wind sensors, such as anemometers) and / or safety systems, as well as...

[0109] Start and stop commands are output by monitoring the actions of the speed drive or other control components assigned to the motion, particularly the actions of the motor-driven orientation system 3, the lifting winch 4 and the distribution winch 5, as well as the actions of possible safety devices of the crane (such as general shut-off actuators).

[0110] Advantageously, at least one anemometer (not shown) is mounted on frame 2 and connected to command / control unit.

[0111] It remains advantageous that lifting safety devices (not shown), such as top and bottom travel ends, are mounted on the lifting winch 4 to ensure the travel of the lifting rope 42 and are connected to the command / control unit. Similarly, distribution safety devices (not shown), such as front and rear travel ends, are mounted on the distribution winch 5 to ensure the travel of the distribution rope 52 and are connected to the command / control unit.

[0112] Therefore, most electrical wiring and electrical testing should be performed in the factory directly on the crane component 1 formed on the pivot, even before the crane is assembled on the construction site.

Claims

1. A crane element (1) for pivot formation of a rotating portion of a component-mounted crane, the pivot-formed crane element (1) comprising a frame (2) on which are mounted: a motor-driven orientation system (3) including a pivot mechanism (31) about an orientation axis (Z) and at least one orientation electric motor (30) cooperating with the pivot mechanism (31) to pivot the frame (2) about the orientation axis (Z); a lifting winch (4) provided with a lifting electric motor (40) cooperating with a lifting drum (41), a lifting rope (42) wound around the lifting drum; and a distribution winch (5) provided with a distribution electric motor (50) cooperating with a distribution drum (51), a distribution rope (52) wound around the distribution drum; wherein, The frame (2) includes a frame (6) and a truss (7) projecting from the frame (6) to form a cantilever bracket, wherein all the motor-driven orientation systems (3), the lifting winch (4), and the distribution winch (5) are mounted on the frame (6); the frame (6) has: a central portion (60) on which the motor-driven orientation systems (3) and the truss (7) are mounted; and a front portion (61) on which the central portion (60) extends forward beyond the truss (7), and the lifting winch (4) and the distribution winch (5) are mounted. The feature is that the front portion (61) includes an upper base (65), the lifting winch (4) is mounted on the upper base, the distribution winch (5) is mounted below the upper base, such that the lifting winch (4) is positioned above the distribution winch (5), and wherein the frame (6) has a rear portion (62) that causes the central portion (60) to extend rearward beyond the truss (7), and the truss (7) supports the top attachment (74) of the balance cantilever, and the rear portion of the frame (6) supports the lower attachment (64) of the balance cantilever.

2. The crane element (1) formed by the pivot according to claim 1, wherein, The front portion (61) of the frame (6) does not have any tracks for distributing the trolley, so the front portion (61) does not constitute a cantilever element.

3. The crane element (1) formed by the pivot according to claim 1, wherein, The truss (7) supports the top attachment (73) of the cantilever, and the front portion (61) of the frame (6) supports the lower attachment (63) of the cantilever.

4. The pivot-formed crane element (1) according to claim 1, wherein the lifting drum (41) and the distribution drum (51) are rotatable about parallel or substantially parallel axes.

5. The crane element (1) formed by the pivot according to claim 1, wherein, The truss (7) supports an upper rope steering system (78) located above and behind the lifting winch (4) for the first steering of the lifting rope (42), and the front portion (61) of the frame (6) supports a lower rope steering system (68) located below and behind the lifting winch (4) for the second steering of the lifting rope (42).

6. The pivot-formed crane element (1) according to claim 5, wherein, At least one of the upper rope steering system (78) and the lower rope steering system (68) is coupled to a load measuring sensor to measure the load at the level of the lifting rope (42).

7. The crane element (1) formed by the pivot according to claim 1, wherein, The frame (2) has at least one first bearing (66) and at least one second bearing (67), the lifting drum (41) is rotatably mounted on the at least one first bearing, and the distribution drum (51) is rotatably mounted on the at least one second bearing.

8. A crane element (1) formed by a pivot according to any one of the preceding claims, comprising an electrical assembly mounted on a frame (2) and integrating at least one command / control unit, a power interface for plugging in a power source, and a cable network connecting the command / control unit and the power interface to a directional electric motor (30), a lifting electric motor (40), and a distribution electric motor (50).

9. A transportable package for a rotating part of a component-mounting crane, said transportable package comprising: The pivot-formed crane element (1) according to any one of claims 1 to 8, and the main crane element, selected from the crane element (9) formed by the counterweight cantilever and the crane element (8) formed by the cantilever leg, are fixed on the frame (2) of the pivot-formed crane element (1).

10. The transportable packaging according to claim 9, wherein, The main crane element is securely fastened to the frame (2) of the crane element (1) formed by the pivot by welding.

11. The transportable package according to any one of claims 9 and 10, comprising an electrical assembly mounted on the main crane element and integrating at least one command / control unit, a power interface for plugging in a power source, and a cable network connecting the command / control unit and the power interface to the directional electric motor (30), the lifting electric motor (40), and the distribution electric motor (50).

12. A rotating portion of a component-mounted crane, comprising a transportable package according to any one of claims 9 to 11, and further comprising an auxiliary crane element selected from a crane element (9) formed by a balancing cantilever and a crane element (8) formed by cantilever legs, and which is not a main crane element, the auxiliary crane element being detachably fastened to a frame (2) of a crane element (1) formed by a pivot.

13. A component-installing crane, comprising: The rotating portion according to claim 12; A frame (2) of a crane element (1) formed by a pivot is mounted on a mast (20) with a top.

14. The component-mounting crane according to claim 13, comprising: A cantilever, which has a cantilever leg forming a crane element (8) fastened to a frame (2) of a crane element (1) formed by a pivot; A distribution trolley, suspended on a cantilever and connected to the distribution winch (5) via a distribution rope (52), is used for displacement of the distribution trolley along the cantilever in opposite forward and backward directions; a pulley, suspended from the distribution trolley by a lifting rope (42) connected to the lifting winch (4), is used for the upward and downward displacement of the pulley.

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