Trolley for low-configuration crane system and low-configuration crane system

Abstract

A trolley (8) for a low configuration crane system (2), comprising: a plurality of cross members (22, 26), a plurality of arms (50A-50D) vertically supporting the cross members, the cross members extending between the arms; at least one of the cross members is configured to support a portion of a lifting member (14) configured to lift a load in use; at least one beam (48A, 48B) extending between the cross members, the beam being spaced apart from the cross elements in a direction perpendicular to the cross members; and a plurality of arms extending between the cross-member and the beam to provide a connection therebetween wherein the cross-member comprises a tubular profile having an arcuate or circular cross-section. A low configuration crane system (2) is also provided.

Description

Technical Field

[0001] This utility model relates to a trolley for a low-profile crane system and a low-profile crane system. Background Technology

[0002] In a typical bridge crane configuration, a trolley is mounted to an overhead beam or gantry. The trolley includes wheels to allow it to move along the beam, providing its horizontal movement. A pulley system can be mounted to the trolley to support hooks, etc., for lifting loads during use.

[0003] A low-profile trolley can be arranged to travel along the lower flange of a horizontal beam or rail. The trolley includes: a trolley frame; load-bearing wheels attached to the trolley frame and arranged to travel on the upper surface of the lower flange of the beam or rail, along its two longitudinal edges, and at least some of these load-bearing wheels are driven wheels for moving the trolley; a hoisting mechanism including a rope drum for a hoisting rope, a hoisting member cooperating with the hoisting rope for lifting a load, a hoisting motor for driving the rope drum, and gears interconnecting the hoisting motor and the rope drum. The rope drum is supported to one side of the trolley frame, and the hoisting member is arranged to travel in a vertical plane substantially through the middle of the beam or rail, below the beam or rail. The low-profile trolley can be a conventional overhead trolley type for light-duty bridge cranes with a single main support. The underlying concept is to save hallway height by occupying as little space as possible in the vertical direction, and also to save headroom height under the trolley.

[0004] In low-profile trolleys, the lifting mechanism components can be distributed on both sides of a main support, allowing the hook to be lifted very close to the main support to keep the crane assembly as low as possible. A key feature of this type of trolley is its ability to accommodate beams of varying widths as the mechanism is used on different types of crane main supports. In contrast, there are trolleys with a standard structure where the lifting mechanism components are fixed relative to each other as a single assembly, located under the main support or between parallel beams and secured to adjustable wheel plates forming the trolley; or there are monorail trolleys that travel on I-rails and therefore cannot adjust the wheel tracks. Monorail trolleys are typically compact and suitable for smaller loads, such as those under 2 tons.

[0005] Typically, the hoisting rope is guided downward from the rope drum to the first rope sheave of the hook assembly, which includes the hook, then upward from the hook assembly to a rope sheave on the other side of the trolley, then downward again from that rope sheave to the second rope sheave of the hoisting assembly, and finally upward from there to the rope securing device on the trolley frame.

[0006] Where vertical working space is limited, a "low headroom" crane system can be used. In this arrangement, it is desirable for the various components of the trolley to be positioned as high as possible relative to the gantry, thereby providing increased clearance between the trolley and the ground during use. Examples of this arrangement are provided in WO 2015 / 110705, US 5461985, and US 2005 / 0092201. Prior art systems include several disadvantages.

[0007] This invention is intended to overcome or improve one or more problems in existing technical solutions. Utility Model Content

[0008] According to a first aspect, a trolley for a low-profile crane system is provided, comprising:

[0009] Multiple transverse components;

[0010] Multiple arms that vertically support a transverse member that extends between the arms;

[0011] At least one of the transverse members is configured to support part of a lifting member, which is configured to lift a load during use;

[0012] At least one beam extending between the transverse members, the beam being spaced apart from the transverse members in a direction perpendicular to the transverse members; and

[0013] Multiple arms extend between the transverse member and the beam to provide a connection between them, wherein the transverse member comprises a tubular profile having an arcuate or circular cross-section.

[0014] According to one embodiment, the beam includes a tubular profile with an arcuate or circular cross-section or a solid circular bar.

[0015] According to one embodiment, the arm includes a first channel for receiving a transverse member.

[0016] According to one embodiment, the arm includes a second channel for receiving the beam, and the vertical distance between the transverse member and the beam is determined by the distance between the first channel and the second channel.

[0017] According to one embodiment, the trolley includes a second beam extending between the transverse members, the second beam being connected to the transverse members via corresponding arms.

[0018] According to one embodiment, at least one of the arms includes wheels or rollers to provide movement of the trolley along the gantry or bridge during use.

[0019] According to one embodiment, at least one arm supports a portion of the lifting mechanism to raise the lifting member during use.

[0020] According to one embodiment, one of the transverse members is configured to support a rope pulley device, while the other transverse member is configured to support an attachment device for lifting the member.

[0021] According to one embodiment, the transverse member and the beam form a U-shaped profile in a direction perpendicular to the transverse member.

[0022] According to one embodiment, the transverse members are parallel, and / or the beams are parallel.

[0023] According to one embodiment, the at least one transverse member is non-rotatably fixed to the arm. According to another embodiment, the at least one transverse member is fixed by an openable joint between the transverse member and the arm.

[0024] According to one embodiment, due to the mass of the load and the lifting mechanism, the non-rotatable joint between the transverse member and the two opposing arms connected to the transverse member can transmit the total torque.

[0025] According to one embodiment, the at least one fastener is provided to secure the transverse member to the corresponding arm, preferably a single fastener.

[0026] According to another aspect, a low-profile crane system including the trolley of the first aspect is provided.

[0027] According to one embodiment, a first transverse member is provided on a first side of the gantry of the crane system, and a second transverse member is provided on a second side of the gantry.

[0028] Where feasible, any aspect of this invention may be combined with any other aspect of this invention.

[0029] Due to this new structure, the circular tubular transverse member is the only structure designed to withstand all forces and torques and also serve as a reeving part hanging feature. Therefore, it achieves the same function with a lighter, cheaper, and simpler solution without the need for additional components such as thick plates, other rods, or multiple screws subjected to shear forces, as used in existing solutions. In manufacturing the transverse member, welding the discrete components together can be avoided or at least minimized.

[0030] This novel structure of the trolley frame provides superior rigidity. The trolley is easy to manufacture due to its simple processing from raw materials at low cost. The same tube forming the transverse members can be used for both the roller side and the compartment side. The trolley is easy to assemble. The round tube is inserted into the trolley arm and rests on the arm, where the load from the hook is supported by holes in the arm. Only a minimal number of fastening elements (such as bolts) are needed to lock the round transverse member tube into place.

[0031] This new trolley frame structure allows for the use of a single fastening device (such as a screw) at the end of the transverse member to lock it in place. The load is borne directly by the large bearing surface in the joint between the circular transverse member tube and the support arm. While a single fastener is described as the optimal way to lock the rotation between the transverse member and the arm, other methods of locking the rotation, albeit with more complex designs, may exist.

[0032] Load-bearing longitudinal tubular structures are inexpensive in terms of components and assemblies because the profile can be hollow, thus reducing weight, and it is easy to attach the ends of ropes in different directions (i.e., different angular positions based on the rotational position relative to the potential swing of the load) to rope attachment points and rope pulleys. Load-bearing longitudinal tubular structures with tubular transverse members provide a simple way to transfer cables from one side to the other and inside the protective enclosure.

[0033] According to this invention, the transverse members can have a relatively large diameter and a hollow cross section, which allows for better use of materials and enables them to withstand large loads and torques with less material (weight, cost).

[0034] According to one embodiment, the diameter of the at least one transverse member is 40-100 mm, preferably 55-95 mm, and most preferably 58-90 mm.

[0035] The rotational position of the attachments is easily restricted by mechanical stops, limiting movement to extreme positions. Tubular profiles can be selected to provide suitable lengths for cranes of different specifications (such as different weight classes and different lifting heights). As a closed profile, when viewed from above, the tubular profile is torsional rigid to longitudinal torsion (i.e., torque) with the four load-bearing wheels diagonally offset in the trolley. Uneven loads can cause the trolley frame to twist, and even the lightest wheels may detach from the edges of the gantry's support flanges. Uneven loads can also lead to uneven wear on the wheels and flange edges. Attached Figure Description

[0036] The embodiments of this utility model are described below by way of example only with reference to the accompanying drawings:

[0037] Figure 1A schematic side view of the crane system is shown;

[0038] Figure 2 A perspective view of the trolley of the crane system is shown;

[0039] Figure 3A A simplified perspective view of the trolley is shown.

[0040] Figure 3B A simplified view of the trolley is shown.

[0041] Figure 3C A simplified top view of the trolley is shown.

[0042] Figure 4 A perspective view of the rope pulley device is shown;

[0043] Figure 5 A three-dimensional view of the fixing component is shown;

[0044] Figure 6 A perspective view of the first transverse component of the trolley is shown;

[0045] Figure 7 A first example perspective view of the second transverse member of the trolley is shown, which includes a wedge-shaped lifting member fastener;

[0046] Figure 8 A second example perspective view of the second transverse member of the trolley is shown, wherein a trough-type lifting member fixing member is included; and

[0047] Figure 9 A perspective view of the bracket to be attached to the transverse member is shown. Detailed Implementation

[0048] A schematic diagram of crane system 2 is shown below. Figure 1 As shown. The crane system includes an overhead beam or gantry 4. The gantry 4 may include a main beam, beams, rails, cantilever, etc. The gantry 4 is typically suspended above the floor (e.g., suspended from the ceiling or supported by outriggers). The gantry 4 may be mounted on wheels 7 to run on rails 5 (as shown in the depth direction). The rails 5 may be located below the ends of the gantry 4 (in... Figure 1 In the middle, the gantry extends to the right, and only the left end is shown.

[0049] System 2 includes a hoist 6. The hoist 6 is movably mounted to the gantry 4 to provide movement along the gantry 4 via a moving mechanism, thereby providing movement of the load connected to the hoist 6.

[0050] The hoist 6 includes a trolley or carriage 8. Wheels or rollers 10 are mounted on the trolley 8 to engage the gantry 4 and provide the movement. A motor (not shown) may drive the wheels 10. The hoist 6 may include, in addition to the motor, a gearbox, a control system, and / or other features associated with such a crane system in its movement mechanism. In some embodiments, the trolley 8 may be driven externally (e.g., by a screw drive or an endless loop). A motor may be provided to move the gantry / bridge section, wherein the gantry / bridge is movable. A gearbox may be connected to the wheels or the like to drive the gantry / bridge. The gantry / bridge may be mounted to a gantry, rail, or support structure to allow its horizontal movement. The bridge may include one or more wheels configured to engage the ground or support structure (if provided).

[0051] An electrical housing 66 can be mounted to the trolley 8. The housing 66 can house one or more electrical systems, control systems, and / or power supplies. A remote controller (not shown) may be provided to provide operation of the crane 2. The remote controller may allow adjustment of the trolley's position along the gantry 4 and / or the vertical position of the load. The remote controller may be wired or wireless. The remote controller may include a suspended or radio-controlled controller. It is understood that this invention does not relate to a specific form of the crane system 2 or any auxiliary aspect thereof.

[0052] The lifting member 14 is connected to the hoist 6. The lifting member 14 may include ropes, chains, metal wires, or other suitable components to provide lifting of a load during use. The lifting member 14 includes a connector 16 for connection to the load during use. The connector 16 may include a hook, shackle, or other suitable connector. The connector 16 is connected to the hoist 6 via a pulley arrangement formed using the lifting member 14. In some embodiments, the lifting member 14 may comprise a polymer or synthetic material or steel. The polymer may include ultra-high molecular weight polyethylene.

[0053] The load attached to connector 16 is prone to swaying in the air. Another factor that causes the rope line to deviate below the hoist is the raising / lowering of connector 16, and the rope line will need to be adjusted slightly according to each lifting height. These deviations result in minor movements of the upper pulley assembly 20 and the rope anchor point 44.

[0054] The first portion of the lifting member 14 is mounted to the lifting mechanism 18. For example, the lifting mechanism 18 may include a winch assembly. The lifting mechanism 18 can extend / retract (i.e., extend or retract) the lifting member 14 to change the height of the connection 16. A drum (e.g., a rope reel) or a spool may be provided to store the lifting member 14. Figure 2As best shown, a drum (e.g., a rope drum) or a shaft 15A may be provided to hold the lifting member 14. A motor 15B may be provided to enable movement in the vertical direction (i.e., rotating the drum). The motor may include a gearbox 15C.

[0055] The second portion of the lifting member 14 is held via a pulley assembly 20 (i.e., a pulley or roller). The pulley assembly 20 is connected to the first transverse member 22. The transverse member 22 extends across the width of the trolley 8. The first transverse member 22 forms part of the frame 28 or structure of the trolley 8. In use, the lifting member 14 passes through the pulley assembly 20 to form a loop. Thus, the lifting member 14 extends rearward around the connector 16 and is secured at one end to the trolley 8 by an attachment device 44, which includes a wedge-shaped fixing point 56 mounted on a bracket 52 or a groove-shaped lifting member fixing element 1 (such as...). Figure 8 (As shown). The bracket 52 serves as a fixing point 56 or a fixing point for the lifting component fixing member 1.

[0056] One example of securing the end of the lifting member 14 to the crane system 2 includes a socket and wedge assembly, wherein a rope is secured between the socket and the wedge. Other embodiments for securing the end of the lifting member 14 to the crane system include, for example... Figure 8 The lifting component fastener 1 is described in more detail below, wherein the lifting component fastener can be fixed to the transverse component 26 by means of a bracket 52.

[0057] The trolley 8 includes a frame 28 having beams, arms, and transverse members. A first transverse member 22 and a second transverse member 26 are connected via corresponding beams 48A and 48B. Arms 50A-50D are configured to connect the transverse members 22 and 26 to beams 48A and 48B. Wheels 10 are mounted on arms 50A-50D.

[0058] Transverse members 22 and 26 are tubular in form, including annular or circular cross-sections. Transverse members 22 and 26 are arranged in parallel. Frame 28 includes beams 48A and 48B. Beams 48A and 48B are tubular in form and are parallel. In use, beams 48A and 48B are configured to span the gantry 4. Beams 48A and 48B and / or transverse members 22 and 26 include circular or arc-shaped tubular forms. Beams 48A and 48B and / or transverse members 22 and 26 can form a tubular structure.

[0059] Frame 28 includes arms 50A-50D. Arms 50A-50D are configured to connect transverse members 22, 26 and beams 48A, 48B. Frame 28 includes a U-shaped profile (see Figure 3). Arms 50A-50D receive corresponding transverse members 22, 26 at their first ends 61. At least one fastener 27 is provided to secure the transverse members 22, 26 to the corresponding arms 50A-50D. In this embodiment, arms 50A-50D are mounted to the ends of transverse members 22, 26. In other embodiments, arms 50A-50D can be displaced away from the ends of transverse members 22, 26. Thus, the circular tubular form of the transverse members 22, 26 allows for adjustment of the spacing of beams 48A, 48B (i.e., the length of trolley 8), enabling the hoist to be adapted to support gantry frames of various widths. Wheels 10 are assembled to run along the flanges of the gantry frame 4. Assemble booms 50A-50D at the selected distance; trolley 8 can be mounted on beams or girders of various specifications. The selected distance is determined by the wheelbase of the trolley.

[0060] Arms 50A-50D support corresponding wheels 10. Two arms of arms 50A-50D are configured to support a lifting mechanism 18. The lifting mechanism 18 can be mounted to arms 50A-50D via brackets. The brackets can be located at the corresponding ends of the drum / shaft or its housing. One of the brackets can support a motor for lifting. The motor enables vertical movement of the lifting mechanism (i.e., rotation of the drum). The motor is operably connected to the shaft via a gearbox 15C.

[0061] The second end 62 of arms 50A-50D is configured to receive beams 48A and 48B. Arms 50A-50D include corresponding holes 65 to receive beams 48A and 48B. In this embodiment, arms 50A-50D are configured as a portion of the length of beams 48A / 48B. It is understood that the position of arms 50A-50D along beams 48A and 48B can be adjusted to adjust the width of the trolley 8. Suitable fasteners can be provided to secure arms 50A-50D in place.

[0062] Arm 50C, 50D Figure 6 The details are shown in more detail below. Arm 50C includes a first channel 63 for receiving the transverse member 22. Channel 63 may include a sleeve (e.g., annular or ring-shaped). A second channel 65 is configured to receive beam 48B.

[0063] Rope pulley device 20 in Figures 4-6The diagram is shown in more detail below. The pulley assembly 20 is mounted to the first transverse member 22. In this embodiment, the transverse member 22 is fixed in position (i.e., non-rotating) at both ends of the tubular transverse member 22 with a circular cross-section to the arms 50C, 50D of the frame 28 of the trolley 8 by fasteners 27 such as bolt joints. The pulley assembly 20 includes a housing 24. The housing 24 is configured to at least partially accommodate the pulley 25. The pulley 25 is configured to be rotatably mounted to the housing 24, for example using bearings. The pulley includes a grooved wheel, roller, or the like. The first end 29 of the housing 24 is rounded / arc-shaped to conform to the shape of the pulley 25. A hole 30 is provided to provide space for a bearing / shaft for the pulley 25.

[0064] The second end 32 of the housing 24 is configured to receive the transverse member 22. Therefore, the housing 24 can provide a support or mounting portion for the pulley 25. The housing 24 includes a channel 34 for receiving the transverse member 22. The channel 34 extends laterally through the housing 24. The channel 34 is perpendicular to the axis of rotation of the pulley 25. The second end 32 includes a rounded end, which is configured in a tubular shape corresponding to the transverse member 22. Therefore, the housing 24 and the transverse member 22 are in close fit. A sliding member 36 can be received between the housing 24 and the transverse member 22.

[0065] like Figure 4 As best shown, housing 24 comprises a sheet. This sheet is bent or otherwise shaped. The sheet comprises a single piece, thereby allowing for easier manufacturing and shaping. The profile of housing 24 is generally U-shaped (i.e., parallel to the axis of channel 34). Channel 34 is defined by the top of this U-shape.

[0066] like Figure 3A and Figure 5 As best shown, the retaining member 38 is configured to hold the housing 24 in place on the transverse member 22. The retaining member 38 includes a circular / bow-shaped bracket. The retaining member 38 is received within a recess 40 in the housing 24. The recess 40 may define an elongated slot. The retaining member 38 and the slot 40 may be in a tight fit. This laterally constrains the housing 24 relative to the transverse member 22 in two axial directions. The slot 40 is provided in a second end 32 of the housing. Therefore, the retaining member 38 can be secured to the sliding member 36 and / or the transverse member. Suitable fastening means may be provided on the retaining member 38 and / or the sliding member 36 / transverse member 22. For example, the retaining member 38, the sliding member 36, and the transverse member 22 include holes for receiving fasteners. Typically, the fasteners are removable to allow for maintenance or replacement, etc. In other embodiments, the retaining member 38 may be permanently secured to the transverse member 22.

[0067] 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 to a certain extent, limited by the difference in angular lengths. The housing 24 can rotate from 5 degrees to 45 degrees. Stop members 42 are disposed on the fixing member 38 to abut against the housing 24, thereby restricting movement between them. The stop members 42 may be disposed at both ends of the fixing member 38. In some embodiments, one or both stop members 42 may be displaced from the ends of the fixing member 38 to allow a greater degree of rotation of the housing 24. Figure 8 In some embodiments, the stop member 42 includes a raised lip or flange. In other embodiments, the stop member 42 may be the end of the fixing member 38 and / or a fastener disposed thereon.

[0068] Reference Figure 6 As can be seen, a gap 43 is provided between the fixing member 38 and the housing 24. The gap 43 allows the housing 24 to rotate into the gap (e.g., in the downward direction during use). When the housing member is adjacent to the fixing member 38, further rotation is prevented. Therefore, the size of the gap 43 defines the range of motion of the housing 24.

[0069] The sheave device 20 and the attachment device 44 that provides the fixing points 1, 56 at the ends of the lifting members are attached in such a way that bidirectional rotational movement about the transverse members 22, 26 is allowed (preferably to a certain limit), but longitudinal movement along the transverse members 22, 26 is restricted.

[0070] See Figure 3A , Figure 7 and Figure 1 As previously described, the lifting member 14 is fixed to the trolley 8. The lifting member 14 is attached to the trolley 8 via an attachment device 44. The attachment device is located on the side of the trolley 8 opposite to the sheave assembly 20. This facilitates the direct positioning of the connector 16 or hook assembly 16 below the trolley 8. The attachment device is located on the second transverse member 26. The second transverse member 26 is parallel to the first transverse member 22. The first transverse member 22 and the second transverse member 26 are positioned on opposite sides of the gantry 4 during use.

[0071] Attachment device 44 includes, for example Figure 9The bracket 52 shown is configured to receive a transverse member 26. The bracket 52 includes a channel 54. A second transverse member 26 is disposed within the channel 54 during use. The bracket 52 is generally annular or ring-shaped. Lifting member fasteners 1, 56 are provided to allow attachment of the lifting member 14 during use. The lifting member fasteners 1, 56 are mounted to a fixing point on the bracket 52—such as a flange 58. The lifting member fasteners 1, 56 can be rotatably mounted to the bracket 52. This can accommodate some lateral movement of the lifting member. The bracket 52 can be shaped to limit said rotation (e.g., less than 5 or 10 degrees) to prevent unwanted swaying. The bracket 52 may include a raised sidewall 58 against which the lifting member fastener 1 can abut.

[0072] In some embodiments, the lifting member retainer 56 may include a sleeve or sheath that engages with a wedge to be used with a metal lifting member, such as a wire rope. Thus, the bracket 52 can be used to receive lifting member retainers for both metal and polymer lifting members.

[0073] In some embodiments, a sliding member 36 may be provided to allow the support 52 to rotate about the transverse member 26. The sliding member is positioned between the support 52 and the transverse member 26. The sliding member may comprise a low-friction material. The sliding member may be a polymer. For example, the sliding member may comprise one or more of the following: PTFE; PEEK; PPS; nylon; acetal; and / or polyester. In one embodiment, the sliding member is configured to extend partially about the transverse member 26. For example, the sliding member may be arcuate in shape. In other embodiments, the sliding member 36 includes a tube, cylinder, or sleeve configured to surround the transverse member 26.

[0074] The bracket 52 can be held on the second transverse 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 arcuate / arc-shaped. Therefore, the recess 64 correspondingly includes an arcuate slot. The fixing member 38 is secured to the transverse member 26 via a fastener 67. The fastener may include bolts, screws, or other suitable fasteners.

[0075] The angular length of the recess 64 is greater than the angular length of the fixing member 38. Therefore, the bracket 52 can rotate freely by the angular length difference between the recess 64 and the fixing member 38. The bracket 52 can rotate from 5 degrees to 45 degrees; preferably from 5 degrees to 10 degrees. The fastener 67 can be used as a stop member located at one or both ends of the fixing member 38.

[0076] Figure 8An embodiment of a lifting member fastener 1 for mounting a composite lifting member 14 of a crane system 2 is shown. The lifting member fastener 1 may be equivalently referred to as a composite rope fastener 1 or a composite rope securing device 1.

[0077] The lifting component fixing member 1 includes a body 102. The body includes: a top mounting device 105, which is mounted to the trolley 8 of the crane 2; a lifting component outlet; and a slotted arm 3, which includes at least one groove 3-1 formed to receive the composite lifting component 14 through multiple turns.

[0078] According to one embodiment, the grooved arm 3 includes a distal end 3-2 adapted to secure the synthetic rope or lifting member 14 after the lifting member has been turned around at the knotted portion of the lifting member. Preferably, the grooved arm 3 includes a horizontal solid shaft.

[0079] The synthetic rope 14 is configured to be wound around the grooved arm 3 to provide suitable stopping friction with a safety factor between the lifting member fixing member and the synthetic rope. Suitable stopping friction can be achieved by a suitable amount of rotation, such as the rope rotating eight times around the grooved arm 3.

[0080] According to one embodiment, the distal end 3-2 includes a lifting member end interface 3-3 for securing the lifting member 14 to the knotted portion of the lifting member. The end knot of the synthetic rope 14 can be held around the protruding end interface 3-3 using, for example, washers 70 and ring pins 71 inserted into the end interface holes for easy installation.

[0081] According to one embodiment, the top mounting device 5 includes a mounting channel for mounting the lifting member fastener 1 to a bracket 52 of an attachment device 44, which is attached to a transverse member 26 of a trolley 8. According to one embodiment, the top mounting device 5 includes a mounting extension, such as a mounting flange projecting vertically from the body 102. According to one embodiment, the mounting channel is configured to pass through the mounting extension. According to one embodiment, the lifting member fastener 1 includes a lifting member passage 6 on the body 102 between the mounting extensions. According to one embodiment, the passage is formed by an upper surface of the body and an inner surface of the mounting extension.

[0082] The path of the synthetic rope preferably extends from the groove 3-1 of the grooved arm 3 to the center of gravity of the top mounting device 105 of the lifting member fixing member 1, more preferably along the groove, and downward through the smooth outlet at the center of the lifting member fixing member body 102, thereby allowing the synthetic rope to bend in any direction at a certain rope angle.

[0083] According to one embodiment, the load measuring pin 72 can be assembled via a fixing point such as a flange 58 on the bracket 52 of the mounting channel and attachment device 44.

[0084] According to one embodiment, the body 102 includes a protruding protrusion 104 opposite the slotted arm 3 for providing balancing mass to keep the lifting member fixing 1 balanced when no load is attached to the crane 2 via the lifting member fixing 1. According to one embodiment, the balancing mass of the slotted arm 3 and the protruding protrusion is arranged on opposite sides of the body 102, thereby forming a branch in the body.

[0085] According to one embodiment, the grooved arm 3 and the protruding protrusion 104 form opposing asymmetrical branches relative to the center of the lifting member body 102. According to another embodiment, the lifting member fixing member 1 includes an asymmetrical shape formed by the grooved arm branch 3 and the counterweight branch 104 on opposite sides of the center of gravity of the top mounting device 105. This asymmetrical shape is designed to address the limited space in a low-profile trolley and to leave the maximum lifting height (HOL) below the hoist.

[0086] According to one embodiment, the center of gravity of the lifting component fixing member 1 is located at the lifting component outlet.

[0087] According to one embodiment, the groove 3-1 for receiving the composite lifting member is adapted to have a smaller bending radius than the bending radius of the steel lifting member 14.

[0088] According to one embodiment, the bending radius of the lifting member 14 on the lifting member fixture 1 is arranged to be varied to optimize the lifespan of the lifting member, with the bending radius being largest near the lifting member outlet. Therefore, the closer to the outlet point where the lifting member force and contact pressure are greater, the larger the bending radius. According to one embodiment, the at least one lifting member groove 3-1 includes a varied groove radius to optimize the lifespan of the lifting member. According to one embodiment, the varied groove radius increases 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 body, in the direction towards the lifting member outlet.

[0089] According to one embodiment, the at least one lifting member groove 3-1 includes 4 to 12 turns, more preferably 6 to 10 turns, and most preferably 8 turns of the lifting member around the groove arm 3. According to one embodiment, the lifting member fixing member 1 is a cast steel component, preferably having a partially machined portion.

[0090] This device can be installed in "low profile" or "low headroom" crane systems. Such systems can be installed in locations with limited vertical space. Beams 48A and 48B are the connecting sides of the low headroom hoist, allowing the connecting structure to be located below the support beam or main beam. Wheels 10 are assembled to travel along the flange of the support beam or main beam. The booms 50A-50D are assembled at selected intervals, and the trolley 8 can be mounted on main beams or beams of various sizes. Figure 3C In this system, the selected distance within a pair of arms 50B-50D (or 50A-50C) is determined by the wheelbase of the trolley. The installation of sheave assembly 20 and attachment device 44 on the circular tubular transverse members 22, 26 allows the sheave assembly 20 and attachment device 44 to raise the height of the gantry 4 or above it during use. This increases the vertical clearance of the hoisting system 6. The lifting mechanism 18 and / or other components can be mounted on the side of the trolley 8, also increasing the vertical clearance. The lifting mechanism 18 can be mounted to arms 50A-50D for lateral attachment.

Claims

1. A trolley (8) for a low-profile crane system (2), characterized in that, The vehicle includes: Multiple transverse members (22, 26); Multiple arms (50A-50D) that vertically support the transverse member, the transverse member extending between the arms; At least one of the transverse members is configured to support part of the lifting member (14), which is configured to lift a load in use; At least one beam (48A, 48B) extending between the transverse members, the beam being spaced apart from the transverse members in a direction perpendicular to the transverse members; and The plurality of arms extend between the transverse member and the beam to provide a connection between the transverse member and the beam, wherein the transverse member includes a tubular profile having an arcuate or circular cross-section.

2. The trolley according to claim 1, wherein, The beams (48A, 48B) include a tubular profile with an arcuate or circular cross-section.

3. The trolley according to claim 1, wherein, The arm (50A-50D) includes a first channel (63) for receiving the transverse members (22, 26).

4. The trolley according to claim 3, wherein, The arm (50A-50D) includes a second channel (65) for receiving the beam (48A, 48B), and wherein the vertical distance between the transverse member (22, 26) and the beam is determined by the distance between the first channel and the second channel.

5. The trolley according to claim 1, wherein, The trolley includes a second beam extending between the transverse members, the second beam being connected to the transverse members via corresponding arms.

6. The trolley according to claim 1, wherein, At least one of the arms (50A-50D) includes a wheel (10) or roller to provide movement of the trolley (8) along the gantry (4) or bridge in use.

7. The trolley according to claim 1, wherein, At least one of the arms (50A-50D) supports a portion of the lifting mechanism (18) to raise the lifting member (14) during use.

8. The trolley according to claim 1, wherein, One of the transverse members (22, 26) is configured to support the sheave device (20), and the other transverse member is configured to support the attachment device (44) for the lifting member (14).

9. The trolley according to claim 1, wherein, The transverse members (22, 26) and the beam form a U-shaped profile in a direction perpendicular to the transverse members.

10. The trolley according to claim 1, wherein, The transverse members (22, 26) are parallel, and / or the beams (48A, 48B) are parallel.

11. The trolley according to claim 1, wherein, At least one fastener (27) is provided to secure the transverse member (22, 26) to the corresponding arm (50A-50D).

12. A low-profile crane system (2), characterized in that, It includes the trolley (8) as described in any of the preceding claims.

13. The low-profile crane system according to claim 12, wherein, A first transverse member is provided on the first side of the gantry (4) of the low-profile crane system (2), and a second transverse member is provided on the second side of the gantry.

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