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WO2025189326A1 - Chariot et système de grue - Google Patents

Chariot et système de grue

Info

Publication number
WO2025189326A1
WO2025189326A1 PCT/CN2024/081060 CN2024081060W WO2025189326A1 WO 2025189326 A1 WO2025189326 A1 WO 2025189326A1 CN 2024081060 W CN2024081060 W CN 2024081060W WO 2025189326 A1 WO2025189326 A1 WO 2025189326A1
Authority
WO
WIPO (PCT)
Prior art keywords
cross
members
trolley
arms
lifting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/CN2024/081060
Other languages
English (en)
Inventor
Tao Han
Christoph Passmann
Peicheng Feng
Jack Luo
Ford JIANG
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KONECRANES (SHANGHAI) Co Ltd
Konecranes Global Oy
Original Assignee
KONECRANES (SHANGHAI) Co Ltd
Konecranes Global Oy
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by KONECRANES (SHANGHAI) Co Ltd, Konecranes Global Oy filed Critical KONECRANES (SHANGHAI) Co Ltd
Priority to PCT/CN2024/081060 priority Critical patent/WO2025189326A1/fr
Publication of WO2025189326A1 publication Critical patent/WO2025189326A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C11/00—Trolleys or crabs, e.g. operating above runways
    • B66C11/02—Trolleys or crabs, e.g. operating above runways with operating gear or operator's cabin suspended, or laterally offset, from runway or track
    • B66C11/04—Underhung trolleys

Definitions

  • the present invention relates to a trolley for a low-construction crane system and a low-construction crane system.
  • a trolley is mounted to an overhead beam or gantry.
  • the trolley comprises wheels to allow the trolley to move along the beam to provide horizontal movement thereof.
  • a pulley system may be mounted to the trolley to support a hook or the like to lift the load in use.
  • a low construction trolley may be arranged to travel along a lower flange of a horizontal beam or rail, whereby the trolley comprises a trolley frame; bearing wheels that are attached to the frame of the trolley and arranged to travel on an upper surface of the lower flange of the beam or rail, on both longitudinal edges thereof, and at least some of which are driven wheels to move the trolley; a hoisting mechanism comprising a rope drum for a hoisting rope, a hoisting member in cooperation with the hoisting rope for hoisting a load, a hoisting motor for driving the rope drum, and a gear to interconnect the hoisting motor and the rope drum, whereby the rope drum is supported to one side of the trolley frame and the hoisting member is arranged to travel under the beam or rail, in a vertical plane passing substantially through the middle of the beam or rail.
  • a low-construction trolley may be a common overhead trolley type for lightweight bridge cranes with one main support. The basic idea behind it is to save hall height by occupying as little space as possible in the vertical direction and
  • the hoisting device parts may be distributed on both sides of one main support so that a lifting hook may be hoisted very close to the main support in order to make the crane assembly as low as possible.
  • An essential part of this trolley type is its capability to adjust to beams of different widths because the device is used on different kinds of crane main supports.
  • trolley of a standard structure in which the hoisting mechanism parts are fixedly in relation to another as a package under the main support or in between parallel girders and fastened to adjustable wheel plates forming the trolley, or a monorail type trolley, which is meant to travel on an I profile rail and thus without the possibility to adjust the trolley wheel track.
  • Monorail trolleys are usually of compact size and are suitable for minor payloads, like below 2 tons.
  • the hoisting rope is led from the rope drum down to a first rope pulley of a hook block comprising the lifting hook, from the hook block up to a sheave on the other side of the trolley, from the sheave down again to a second rope pulley of the lifting block and, finally, from there up to a rope fixing device on the frame of the trolley.
  • “Low headroom” crane systems may be used where vertical working space is limited. In such arrangements, it is desirable that various components of the trolley are provided as high relative to the gantry as possible, thus providing increased clearance between the trolley and the ground in use. Examples of such arrangements are provided in WO 2015/110705, US 5461985 and US 2005/0092201.
  • the prior art systems comprise numerous drawbacks.
  • the present invention aims to overcome or ameliorate one or more problems in the prior art solutions.
  • a trolley for a low-construction crane system comprising:
  • At least one of the cross-members configured to support a portion of a lifting member configured to lift the load in use
  • the cross-member comprises a tubular profile comprising a curved or circular cross-section.
  • the beam comprises a tubular profile comprising a curved or circular cross-section, or a round solid bar.
  • the arm comprises a first channel to receive the cross-member.
  • the arm comprises a second channel to receive the beam, and where a vertical distance between the cross-member and the beam is determined by the distance between said first and second channels.
  • the trolley comprises a second beam extending between the cross-members, the second beam connected to the cross-member via respective arms.
  • At least one of the arms comprises a wheel or roller to provide movement of the trolley along a gantry or bridge in use.
  • At least one of the arms support a portion of a lifting mechanism to raise the lifting member in use.
  • one of the cross-members is configured to support a sheave arrangement and the other of the cross-members is configured to support an attachment arrangement for the lifting member.
  • the cross-members and the beam form a U-shape profile in a direction perpendicular to the cross-members.
  • the cross-members are parallel and/or where the beams are parallel.
  • the at least one cross-member is secured non-rotatably to the arm. According to an embodiment, the at least one cross-member is secured with an openable joint between the cross-member and the arm.
  • the non-rotatable joints between the cross-members and the opposite arms connected to the cross-member are capable of transmitting the total torque due to mass of payload and lifting mechanism.
  • the at least one fastener is provided to the secure the cross-member to the respective arm, preferably one fastener.
  • a low-construction crane system comprising the trolley of the first aspect.
  • a first cross-member is provided on a first side of a gantry of the crane system, and a second cross-member is provided on a second side of the gantry.
  • the round tubular cross-member is the sole structure that is configured to take all the force and torque and also work as reeving part hanging feature, thus enabling a lighter, cheaper, simpler solution without need of additional parts such as thick plates, other bars, or plurality of screws subject to shear forces used in prior solutions to achieve same function. Welding together separate parts can be avoided or at least minimized when manufacturing a cross-member.
  • the trolley frame Due to the new construction of the trolley frame, superior rigidity is provided.
  • the trolley is easy to manufacture due simple machining from raw material with low cost. Same tube forming the cross-member can be used on drum side and cubicle side.
  • the trolley is easy to assemble. Round tubes are inserted into trolley arms and resting on arms, wherein load from hook is supported by the apertures in arms. Only minimum number of securing elements for fastening such as bolts are needed to lock the round cross-member tube in place.
  • the new trolley frame construction enables using at the end portion of the cross-member a sole securing means such a bolt to lock the cross-member in place.
  • the load is directly taken by the large bearing surfaces in the joint between the round cross-member tube and the supporting arm. While one fastener is described as the best way to lock the rotation between the cross-member and the arm, there might be other means to lock the rotation but with more complex design.
  • the load-bearing longitudinal tubular structure is inexpensive in terms of components and assembly, weight-saving in that the profile may be hollow, and it is easy to attach the end of the rope to the rope attachment point and the rope pulleys in different directions, i.e. different angular positions based on the rotational position with respect to the potential sway of the load.
  • the load-bearing longitudinal tubular structure with the tubular cross-members provides an easy way to shift electrical cables from a side to another and inside of a protective cover.
  • the cross-members may have relatively large diameter and are with hollow section which allow better material usage and make them possible to take big load and torque with less material (weight, cost) .
  • diameter of the at least one cross-member is 40-100 mm, preferably 55-95 mm, most preferably 58-90 mm.
  • the rotational position of the attachments is easily limited by a mechanical stop, so that the movement is limited to the limit positions.
  • the tubular profile can be selected to provide a suitable length for cranes of different sizes, such as different weight classes and different lifting heights.
  • As a closed profile the tubular profile is torsionally stiff against longitudinal torsion, i.e. torque, in a situation where the 4 load-bearing wheels are diagonally biased in the trolley in the diagonal direction when the crane is viewed from above.
  • the uneven loading causes twisting in the trolley frame, and can even manifest itself as the lightest wheel coming off the edge of the supporting flange of a gantry. Uneven loading leads to uneven wear of the wheels and the flange edge.
  • Figure 1 shows a schematic side view of the crane system
  • Figure 2 shows a perspective view of a trolley of the crane system
  • Figure 3A shows a perspective view of the trolley in a simplified form
  • Figure 3B shows a front view of the trolley in a simplified form
  • Figure 3C shows a top view of the trolley in the simplified form
  • Figure 4 shows a perspective view of a sheave arrangement
  • Figure 5 shows a perspective view of a fixing member
  • Figure 6 shows a perspective view of a first cross-member of the trolley
  • Figure 7 shows a first example perspective view of a second cross-member of the trolley with a wedge-type lifting member fixing
  • Figure 8 shows a second example perspective view of a second cross-member of the trolley with a groove-type lifting member fixing
  • Figure 9 shows a perspective view of a bracket to be attached to a cross-member.
  • FIG. 1 A schematic view of a crane system 2 is shown in figure 1.
  • the crane system comprises an overhead beam or gantry 4.
  • the gantry 4 may comprise a girder, beam, rail, jib or the like.
  • the gantry 4 is typically suspended above the floor (e.g. suspended from a ceiling or supported by legs) .
  • the gantry 4 can be fitted on wheels 7 to be run on rails 5 (as shown in depth direction) .
  • Rails 5 may be located below ends of the gantry 4 (in figure 1, the gantry is extending to right, and only left end is shown) .
  • the system 2 comprises a hoist 6.
  • the hoist 6 is movably mounted to the gantry 4 to provide movement therealong by a moving mechanism, thereby providing movement of a load connected to the hoist 6.
  • the hoist 6 comprises a trolley or carriage 8. Wheels or rollers 10 are mounted to the trolley 8 to engage the gantry 4 and provide said movement. A motor (not shown) may drive the wheels 10. The hoist 6 may comprise in the moving mechanism besides the motor also a gearbox, control system and/or other features associated with such crane systems. In other embodiments, the trolley 8 may be effected via external driving means (e.g. via a screw drive or endless loop) . A motor may be provided to effect movement of the gantry/bridge portion, where the gantry/bridge is movable. The gearbox may be connected to wheel or the like to drive the gantry/bridge. The gantry/bridge may be mounted to gantry, rail or support structure to allow horizontal movement thereof. The bridge may comprise one or more wheels configured to engage the ground or the support structure where provided.
  • An electrical housing 66 may be mounted to the trolley 8.
  • the housing 66 may house one or more electrical system, control system and/or power supply.
  • a remote controller (not shown) may be provided to provide operation of the crane 2.
  • the remote controller may allow adjustment of the position of the trolley along the gantry 4 and/or the vertical position of the load.
  • the remote controller may be wired or wireless.
  • the remote controller may comprise a pendant or radio controller. It can be appreciated that the exact form of the crane system 2 or ancillary aspects thereof are not pertinent to the invention at hand.
  • a lifting member 14 is connected to the hoist 6.
  • the lifting member 14 may comprise a rope, chain, wire, or other suitable member to provide lifting of the load in use.
  • the lifting member 14 comprises a connector 16 for connecting to the load in use.
  • the connector 16 may comprise a hook, carabiner, or other suitable connector.
  • the connector 16 is connected to the hoist 6 via a pulley arrangement formed using the lifting member 14.
  • the lifting member 14 may comprise a polymeric or synthetic material or steel.
  • the polymer may comprise ultra-high-molecular-weight polyethylene.
  • a payload attached to connector 16 is susceptible to swaying when airborne.
  • a first portion of the lifting member 14 is mounted to a lifting mechanism 18.
  • the lifting mechanism 18 may comprise a winch arrangement.
  • the lifting mechanism 18 may extend/retract (i.e. pay-out or pay-in) the lifting member 14 to vary the height the connector 16.
  • a drum e.g. a rope drum
  • spindle may be provided to store the lifting member 14.
  • a motor 15B may be provided to effect movement in the vertical direction (i.e. to rotate the drum) .
  • the motor may comprise a gearbox 15C.
  • a second portion of the lifting member 14 is held via a sheave arrangement 20 (i.e. a pulley wheel or roller) .
  • the sheave arrangement 20 is connected to a first cross-member 22.
  • the cross-member 22 extends across the width of the trolley 8.
  • the first cross-member 22 forms part of a frame 28 or structure of the trolley 8.
  • the lifting member 14 passes over the sheave arrangement 20 to form a loop.
  • the lifting member 14 therefore extends back around the connector 16 and is fixed to the trolley 8 at an end thereof by an attachment arrangement 44 comprising a wedge-type fixing point 56 or a groove-type lifting member fixing 1 (shown in figure 8) mounted on a bracket 52.
  • the bracket 52 serves as a fixing point for the lifting member fixing 1 or the fixing point 56.
  • One example for securing the end of the lifting member 14 in the crane system 2 comprises a socket and wedge device where a rope is fixed between a socket and wedge.
  • Other embodiments for securing the end of the lifting member 14 in the crane system comprise a lifting member fixing 1 as described in more detail in figure 8, wherein the lifting member fixing may be fixed to the cross-member 26 via a bracket 52.
  • the trolley 8 comprises a frame 28 comprised of beams, arms, and cross-members.
  • a first cross-member 22 and a second cross-member 26 are connected via respective beams 48A, B.
  • Arms 50A-D are provided to connect the cross-members 22, 26 with the beams 48A, B.
  • the wheels 10 are provided on the arms 50A-D.
  • the cross-members 22, 26 are tubular in form comprising a round or circular cross-section.
  • the cross-members 22, 26 are provided in a parallel arrangement.
  • the frame 28 comprises beams 48A, B.
  • the beams 48A, B are tubular in form.
  • the beams 48A, B are parallel.
  • the beams 48A, B are configured to straddle the gantry 4.
  • the beams 48A, B and/or cross-members 22,26 comprise a circular or curved tubular form.
  • the beams 48A, B and/or cross-members 22, 26 may form a tubular framework.
  • the frame 28 comprises arms 50A-D.
  • the arms 50A-D are configured to unite the cross-members 22, 26 and the beams 48A, B.
  • the frame 28 comprise a U-shaped profile (see figure 3) .
  • the arms 50A-D receive the respective cross-members 22, 26 at a first end 61 thereof.
  • At least one fastener 27 is provided to the secure the cross-member 22, 26 to the respective arm 50A-D.
  • the arms 50A-D are mounted to the ends of the cross-members 22,26.
  • the arms 50A-D may be displaced away from the ends of the cross-members 22, 26.
  • the circular tubular form of the cross-members 22, 26 may therefore allow adjustment of the spacing of the beams 48A, B (i.e.
  • the length of the trolley 8) so that the hoist can be fitted to supporting gantries of various widths.
  • Wheels 10 are fitted to run along gantry 4 flanges. Assembling arms 50A-D on selected distances the trolley 8 can fitted on various sizes of girders or beams. Selected distance is ruled by wheel gauge of the trolley.
  • the arms 50A-D support respective wheels 10. Two of the arms 50A-D are configured to support the lifting mechanism 18.
  • the lifting mechanism 18 may be mounted to the arms 50A-D via brackets.
  • the brackets may be provided at respective ends of the drum/spindle or housing thereof.
  • One of the brackets may support a motor for lifting.
  • the motor effects movement lifting mechanism in the vertical direction (i.e. to rotate the drum) .
  • the motor is operatively connected to the spindle via a gearbox 15C.
  • a second end 62 of the arms 50A-D is configured to receive the beams 48A, B.
  • the arms 50A-D comprise respective apertures 65 to receive the beams 48A, B.
  • the arms 50A-D are provided part way along the length of the beams 48A, B. It can be appreciated, the positions of the arms 50A-D along the beams 48A, B may be adjusted to adjust the width of the trolley 8. Suitable fasteners may be provided to secure the arms 50A-D in position.
  • the arm 50C, D is shown in closer detail in figure 6.
  • the arm 50C comprises a first channel 63 to receive the cross-member 22.
  • the channel 63 may comprise a sleeve (e.g. ring or annular shape) .
  • a second channel 65 is configured to receive the beam 48B.
  • the sheave arrangement 20 is shown in closer detail in figures 4-6.
  • the sheave arrangement 20 is mounted to the first cross-member 22.
  • the cross-member 22 is provided in a fixed position (i.e. does not rotate) by fasteners 27 such as bolt joints to the arms 50C, 50D of the frame 28 of the trolley 8 at both ends of the circular cross-section tubular cross-member 22.
  • the sheave arrangement 20 comprises a housing 24.
  • the housing 24 is configured to at least partially contain the sheave 25.
  • the sheave 25 is configured to be rotatably mounted to the housing 24, for example, using a bearing or the like.
  • the sheave comprise a grooved wheel, roller or the like.
  • a first end 29 of the housing 24 is circular/curved to conform to the shape of the sheave 25.
  • An aperture 30 is provided to provide a space for a bearing/axle of the sheave 25.
  • a second end 32 of the housing 24 is configured to receive the cross-member 22.
  • the housing 24 may therefore provide a bracket or mount for the sheave 25.
  • the housing 24 comprises a channel 34 to receive the cross-member 22.
  • the channel 34 extends transversely across the housing 24.
  • the channel 24 is perpendicular to the rotational axis of the sheave 25.
  • the second end 32 comprises a circular end configured to correspond to the tubular shape of the cross-member 22.
  • the housing 24 therefore comprises a close fit with the cross-member 22.
  • a sliding member 36 may be received between the housing 24 and the cross-member 22.
  • the housing 24 comprises a sheet.
  • the sheet is bent or other formed into shape.
  • the sheet comprises a unitary piece, thereby allowing easier manufacture and increases shape.
  • the housing 24 is generally U-shaped in profile (i.e. parallel to the axis of the channel 34) .
  • the channel 34 is defined by the apex of the U-shape.
  • the fixing member 38 is configured to retain the housing 24 in position on the cross-member 22.
  • the fixing member 38 comprises a circular/arcuate bracket.
  • the fixing member 38 is received within recess 40 in the housing 24.
  • the recess 40 may define an elongate slot.
  • the fixing member 38 and the slot 40 may comprise a close fit. This laterally constrains the housing 24 relative to the cross-member 22 in both axial directions thereof.
  • the slot 40 is provided in the second end 32 of the housing.
  • the fixing member 38 can therefore be fixed to the sliding member 36 and/or cross member.
  • Suitable fastening arrangements can be provided on the fixing member 38 and/or sliding member 36/cross member 22.
  • the fixing member 38, sliding member 36 and cross-member 22 comprise an aperture to receive a fastener.
  • the fastener is removable to allow maintenance or replacement etc.
  • the fixing member 38 may be permanently fixed to the cross-member 22.
  • the angular length of the slot 40 is longer than the angular length of the fixing member 38. This allows the housing 24 to rotate by a degree limited by the difference in angular lengths.
  • the housing 24 may rotate by between 5 and 45 degrees.
  • a stop member 42 is provided on the fixing member 38 to abut against the housing 24 to limit movement therebetween. Stop members 42 may be provided at both ends of the fixing member 38. In some embodiments, one or both of the stop members 42 may be displaced away from the ends of the fixing member 38 to allow a greater degree of rotation of the housing 24. In the embodiment in figure 8, the stop member 42 comprise a raised lip or flange. In other embodiments, the stop member 42 may comprise an end of the fixing member 38 and/or a fastener provided thereon.
  • a gap 43 is provided between the fixing member 38 and the housing 24.
  • the gap 43 allows the housing 24 to rotate into said gap (e.g. in a downward direction in use) .
  • the size of the gap 43 therefore define the range of movement of the housing 24.
  • the sheave arrangement 20 and the attachment arrangement 44 providing a fixing point 1, 56 of lifting member end are attached in a way that both rotational movement is allowed around cross members 22, 26, preferably up to certain limit, but lengthwise movement along cross members 22, 26 is limited.
  • the lifting member 14 is fixed to the trolley 8.
  • the lifting member 14 is attached to the trolley 8 via the attachment arrangement 44.
  • the attachment arrangement is provided on an opposing side of the trolley 8 to the sheave arrangement 20. This helps to position the connector 16 or hook block 16 directly beneath the trolley 8.
  • the attachment arrangement is provided on the second cross-member 26.
  • the second cross-member 26 is parallel to the first cross-member 22.
  • the first cross-member 22 and the second cross-member 26 are provided either side of the gantry 4 in use.
  • the attachment arrangement 44 comprises a bracket 52 shown in figure 9 configured to receive the cross-member 26.
  • the bracket 52 comprises a channel 54.
  • the second cross-member 26 is provided within the channel 54 in use.
  • the bracket 52 is generally annular or ring shaped.
  • a lifting member fixing 1,56 is provided to allow attachment of the lifting member 14 in use.
  • the lifting member fixing 1, 56 is mounted to fixing point such as a flange 58 on the bracket 52.
  • the lifting member fixing 1, 56 may be rotatably mounted to the bracket 52. This may accommodate some lateral movement of the lifting member.
  • the bracket 52 may be shaped to limit said rotation (e.g. to less than 5 or 10 degrees) to prevent undesired swinging.
  • the bracket 52 may comprise raised side walls 58 which the lifting member fixing 1 may abut.
  • the lifting member fixing 56 may comprise a sheath or sleeve in cooperation with a wedge to be used with a metal lifting member such as a wire rope.
  • the bracket 52 can be used for receiving lifting member fixings both for metal and polymer lifting members.
  • a sliding member 36 may be provided to allow rotation of the bracket 52 about the cross-member 26.
  • the sliding member is interposed the bracket 52 about the cross-member 26.
  • the sliding member may comprise a low-friction material.
  • the sliding member may be polymeric.
  • the sliding member may comprise one or more: PTFE; PEEK; PPS; nylon; acetal; and/or polyester.
  • the sliding member is configured to partially extend around the cross-member 26.
  • the sliding member may comprise an arcuate shape.
  • the sliding member 36 comprises a tube, cylinder or sleeve configured to surround the cross-member 26.
  • the bracket 52 may be retained on the second cross-member 26 via a fixing member 38.
  • the fixing member 38 is configured to be received within a recess 64 in the bracket 52.
  • the fixing member 38 is curved/arcuate.
  • the recess 64 therefore comprises an arcuate slot accordingly.
  • the fixing member 38 is fixed to the cross-member 26 via fastener 67.
  • the fastener may comprise bolt, screw or other suitable fastener.
  • the recess 64 comprise an angular length greater than the angular length of the fixing member 38.
  • the bracket 52 is therefore free to rotate by an angular length defined by the difference in angular length between the recess 64 and the fixing member 38.
  • the bracket 52 may rotate by between 5 and 45 degrees; preferably, by between 5 and 10 degrees.
  • the fastener 67 may act as a stop member at one or both ends of the fixing member 38.
  • Figure 8 shows an embodiment of the lifting member fixing 1 for mounting a synthetic lifting member 14 of the crane system 2.
  • the lifting member fixing 1 may equally be called a synthetic rope fixing 1 or a synthetic rope fastening device 1.
  • the lifting member fixing 1 comprises a body 102.
  • the body comprises a top mounting arrangement 105 to the trolley 8 of the crane 2; a lifting member exit; a grooved arm 3 comprising at least one groove 3-1 forming plurality of revolutions adapted to receive the synthetic lifting member 14.
  • the grooved arm 3 comprises a distant end 3-2 adapted to fix the synthetic rope or lifting member 14 after the lifting member revolutions at a lifting member knot portion.
  • the grooved arm 3 comprises a horizontal solid shaft.
  • a synthetic rope 14 is configured to be wound around the grooved arm 3 so as to provide a suitable stopping friction with safety factors between the lifting member fixing and the synthetic rope.
  • a suitable stopping friction can be achieved via suitable amount of revolutions such as eight rope revolutions around the grooved arm 3.
  • the distant end 3-2 comprises a lifting member end interface 3-3 for fixing the lifting member 14 at a lifting member knot portion.
  • a synthetic rope 14 end knot may be kept around the protruding end interface 3-3 using e.g. a washer 70 and a ring pin 71 inserted into an end interface hole for easy installation.
  • the top mounting arrangement 5 comprises mounting channels for mounting the lifting member fixing 1 to a bracket 52 of an attachment arrangement 44 to be attached to a cross-member 26 of the trolley 8.
  • the top mounting arrangement 5 comprises mounting extensions such as mounting flanges protruding vertically from the body 102.
  • the mounting channels are configured to penetrate the mounting extensions.
  • lifting member fixing 1 comprises on the body 102 a lifting member route 6 between the mounting extensions. According to an embodiment route is formed by an upper surface of the body and inner side surfaces of the mounting extensions.
  • the path of the synthetic rope preferably continues to a center of gravity of the top mounting arrangement 105 of the lifting member fixing 1, still preferably along a groove, and down through the smooth exit at centre of the lifting member fixing body 102, allowing below some rope angle in any direction for the synthetic rope to bend.
  • a load measurement pin 72 may be assembled via mounting channels and a fixing point such as a flange 58 on the bracket 52 of the attachment arrangement 44.
  • the body 102 comprises opposite to the grooved arm 3 a protruding projection 104 providing a balancing mass provided to keep the lifting member fixing 1 in balance when no payload is attached to the crane 2 via the lifting member fixing 1.
  • the grooved arm 3 and the balancing mass of the protruding projection are arranged on opposite sides of the body 102 forming twigs in the body.
  • the grooved arm 3 and the protruding projection 104 form opposite asymmetric twigs relative the center of the lifting member body 102.
  • the lifting member fixing 1 comprises an asymmetric shape formed by the grooved arm twig 3 and the balancing mass twig 104 on the opposite side of the center of gravity of the top mounting arrangement 105. Said asymmetric shape is to solve a limited space in a low construction trolley and to leave a maximum height-of-lifting HOL, below the hoist.
  • the center of gravity of the lifting member fixing 1 is located at the lifting member exit.
  • the groove 3-1 for receiving the synthetic lifting member is adapted for a smaller bending radius of the synthetic lifting member 14 relative to the bending radius of a steel lifting member.
  • bending radius of the lifting member 14 on the lifting member fixing 1 is arranged varying for optimizing lifting member lifetime, the bending radius to be largest closer to lifting member exit.
  • the at least one lifting member groove 3-1 comprises a varying groove radius for optimizing lifting member lifetime.
  • the varying groove radius is increasing in direction to the lifting member exit along the path of the lifting member 14 from the grooved arm 3 to the body 102, particularly from the grooved arm 3 to the lifting member route on the body.
  • the at least one lifting member groove 3-1 comprises 4 to 12 lifting member revolutions around the grooved arm 3, more preferably 6 to 10 revolutions, most preferably 8 revolutions.
  • the lifting member fixing 1 is a cast steel component preferably with partly machined portions.
  • the present arrangement may be provided in a “low-profile” or “low headroom” crane system. Such a system may be installed where vertical space is limited.
  • the beams 48A, 48B are connecting sides of a low headroom hoist in a such way that connecting structure is below a supporting beam or girder.
  • Wheels 10 are fitted to run along flanges of the supporting beam or girder.
  • Assembling arms 50A-D on selected distances the trolley 8 can be fitted on various sizes of girders or beams. Selected distance within pair of arms 50B-50D (or 50A-50C ) is ruled by wheel gauge of the trolley in FIG 3C.
  • Providing the sheave arrangement 20 and the attachment arrangement 44 on the round tubular cross-members 22, 26 allows the sheave arrangement 20 and the attachment arrangement 44 to raise level or above the gantry 4 in use. This increases the vertical clearance for the hoist system 6.
  • the lifting mechanism 18 and/or other components may be provided on the sides of the trolley 8, also increasing vertical clearance.
  • the lifting mechanism 18 may be mounted to the arms 50A-D to facilitate side attachment.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Carriers, Traveling Bodies, And Overhead Traveling Cranes (AREA)

Abstract

Chariot (8) pour système de grue à structure basse (2) comprenant : une pluralité de traverses (22, 26), une pluralité de bras (50A-D) supportant verticalement les traverses, la traverse s'étendant entre des bras; au moins l'une des traverses étant conçue pour supporter une partie d'un élément de levage (14) conçu pour soulever la charge en cours d'utilisation; au moins une barre (48A, 48B) s'étendant entre les traverses, la barre étant espacée des traverses dans une direction perpendiculaire aux traverses; et la pluralité de bras s'étendant entre les traverses et la barre pour assurer une liaison entre elles, la traverse comprenant un profilé tubulaire comprenant une section transversale incurvée ou circulaire. Système de grue à structure basse (2).
PCT/CN2024/081060 2024-03-12 2024-03-12 Chariot et système de grue Pending WO2025189326A1 (fr)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5461985A (en) 1993-04-13 1995-10-31 Mannesmann Aktiengesellschaft Traveling trolley, in particular single-rail trolley with compact height
US6564954B1 (en) * 1996-08-22 2003-05-20 R. Stahl Fordertechnik Gmbh Rope hoist with elastic frame
US20050092201A1 (en) 2003-09-26 2005-05-05 Klaus-Jurgen Winter Crane trolley with low overall height
WO2015110705A1 (fr) 2014-01-24 2015-07-30 Konecranes Plc Chariot à structure basse pour treuil à câble métallique
US20170152128A1 (en) * 2014-06-06 2017-06-01 Kito Corporation Rope hoist
US10486948B2 (en) * 2015-05-01 2019-11-26 Kito Corporation Rope hoist

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5461985A (en) 1993-04-13 1995-10-31 Mannesmann Aktiengesellschaft Traveling trolley, in particular single-rail trolley with compact height
US6564954B1 (en) * 1996-08-22 2003-05-20 R. Stahl Fordertechnik Gmbh Rope hoist with elastic frame
US20050092201A1 (en) 2003-09-26 2005-05-05 Klaus-Jurgen Winter Crane trolley with low overall height
WO2015110705A1 (fr) 2014-01-24 2015-07-30 Konecranes Plc Chariot à structure basse pour treuil à câble métallique
US20170152128A1 (en) * 2014-06-06 2017-06-01 Kito Corporation Rope hoist
US10486948B2 (en) * 2015-05-01 2019-11-26 Kito Corporation Rope hoist

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