WO2023274263A1 - Tête de flèche en treillis pour conditions de travail multiples et grue - Google Patents

Tête de flèche en treillis pour conditions de travail multiples et grue Download PDF

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Publication number
WO2023274263A1
WO2023274263A1 PCT/CN2022/102102 CN2022102102W WO2023274263A1 WO 2023274263 A1 WO2023274263 A1 WO 2023274263A1 CN 2022102102 W CN2022102102 W CN 2022102102W WO 2023274263 A1 WO2023274263 A1 WO 2023274263A1
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WO
WIPO (PCT)
Prior art keywords
pull plate
side vertical
arm head
plate
condition
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Application number
PCT/CN2022/102102
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English (en)
Chinese (zh)
Inventor
石丽君
邵吉吉
Original Assignee
湖南三一中型起重机械有限公司
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Application filed by 湖南三一中型起重机械有限公司 filed Critical 湖南三一中型起重机械有限公司
Publication of WO2023274263A1 publication Critical patent/WO2023274263A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62—Constructional features or details
    • B66C23/64—Jibs
    • B66C23/66—Outer or upper end constructions
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction

Definitions

  • the present application relates to the technical field of cranes, in particular to a multi-working-condition truss arm head and a crane.
  • a crane is a multi-action hoisting machine that vertically lifts and horizontally transports heavy objects within a certain range through the boom and the wire rope around the main pulley of the boom. It is widely used in the hoisting industry.
  • the jib of a common crane usually includes parts such as a main jib, an adapter jib section and a lattice jib head, wherein a main pulley is installed on the front end of the lattice jib head, and a wire rope for hoisting heavy objects passes around the main pulley to lift the heavy object.
  • hoisting parts there are many kinds of hoisting parts.
  • most of the hoisting parts are thin and tall parts such as towers and fans; in the field of tunnel development, most of the hoisting parts are components of shield machines, and these parts not only need to be flipped during the hoisting process, Moreover, it is also necessary to monitor the lifting force in real time to ensure the force balance of each lifting point.
  • the truss arm head of the existing crane has a single function, which cannot meet the needs of individual hoisting operations and multiple working conditions.
  • the problem solved by this application is how to improve the use range of the crane lattice jib head to meet different use requirements.
  • this application provides a multi-working condition truss arm head, including:
  • an arm head body having a first end and a second end
  • a door frame the door frame has a first end and a second end, and the lower part of the first end of the door frame is rotatably connected with the lower part of the second end of the arm head body, and the second end of the door frame is suitable for Connect with the transfer arm section;
  • the first pull plate structure
  • the second pull plate structure is provided with a tension detection device
  • the upper part of the first end of the gantry in the wind power hoisting condition, is rotationally connected with the upper part of the second end of the arm head body through the first pull plate structure; in the shield hoisting condition, the The upper part of the first end of the mast is rotatably connected with the upper part of the second end of the main body of the arm head through the second pull plate structure.
  • the second pull plate structure includes a front pull plate, a rear pull plate and the tension detection device; the front pull plate is used to be rotatably connected to the upper part of the first end of the door frame, and the rear pull plate The plate is used to rotatably connect with the upper part of the second end of the main body of the arm head; the front pull plate has a first cavity, the rear pull plate has a second cavity, and the first cavity is connected to the first cavity.
  • the two cavities communicate, a part of the tension detection device is accommodated in the first cavity and connected to the front pull plate, and the other part of the tension detection device is accommodated in the second cavity and connected to the Describe the rear pull plate connection.
  • the front pull plate is provided with a first connection hole
  • the rear pull plate is provided with a second connection hole
  • the tension detection device is provided with a third connection hole and a fourth connection hole
  • the One end of the tension detection device is connected to the front pull plate at the third connection hole and the first connection hole through a pin shaft
  • the other end of the tension detection device is connected to the rear pull plate at the fourth connection hole.
  • the connection hole and the second connection hole are connected by a pin shaft.
  • the front pull plate includes a first side vertical plate provided with a first mounting hole, a second side vertical plate provided with a second mounting hole, and two second connecting plates oppositely arranged, the first The side vertical plate, the second side vertical plate and the two second connecting plates jointly enclose the first cavity, and the first installation hole and the second installation hole are arranged coaxially, and the The front pull plate is hinged to the upper part of the second end of the main body of the arm head at the first mounting hole and the second mounting hole through pin shafts.
  • the rear pull plate includes a third side vertical plate provided with a third mounting hole, a fourth side vertical plate provided with a fourth mounting hole, and two third connecting plates oppositely arranged, the third The side vertical plate, the fourth side vertical plate and the two third connecting plates jointly enclose the second cavity, and the third installation hole and the fourth installation hole are arranged coaxially, and the The rear pull plate is hinged to the upper part of the first end of the door frame at the third mounting hole and the fourth mounting hole through pin shafts.
  • the first side vertical plate and the third side vertical plate are located on the same side of the second pull-plate structure, and in the length direction of the second pull-plate structure, the first side
  • the gap between the vertical plate and the third side vertical plate is between 0-2mm.
  • the second side vertical plate and the fourth side vertical plate are located on the same side of the second pull plate structure, and there is a gap between the second side vertical plate and the fourth side vertical plate distance and form avoidance gaps, and the avoidance gaps are suitable for avoiding the protrusions on the tension detection device.
  • the first pull plate structure includes two opposite fifth side vertical plates and two opposite first connecting plates, both ends of the fifth side vertical plate in the length direction are provided with The fifth installation hole, the two ends of the first pull plate structure in the length direction pass through the fifth installation hole with the upper part of the first end of the door frame and the upper part of the second end of the main body of the arm head respectively Pin hinged.
  • the multi-working-condition truss arm head also includes a reversing pulley block and a hoisting pulley block, the reversing pulley block is arranged on the upper end of the arm head main body, and the hoisting pulley block is arranged on the arm head main body The lower part of the first end.
  • the present application also provides a crane, including a main boom, an adapter jib section and the above-mentioned multi-working-condition truss jib head, one end of the adapter jib section is connected to the main jib, and the The other end of the jib joint is connected to the second end of the gantry of the multi-working-condition truss jib head.
  • the multi-working-condition truss arm head of the present application is provided with the first tension plate structure and the second tension plate structure, and a tension detection device is arranged in the second tension plate structure, when the rear end of the arm head main body
  • the truss arm head is inclined downward at a certain angle, and this angle meets the needs of the wind power hoisting industry, so that the truss arm head can be used as a wind power arm head for wind power hoisting
  • the hoisting operation is carried out under working conditions, and there is no need to change the angle, and the installation efficiency is high; when the upper rear end of the main body of the arm head is connected with the upper front end of the mast through the second pull plate structure, the arm head of the truss can obtain a downward tilt at a certain angle.
  • the truss arm head can also detect the tension of the second tie plate structure, so that the truss arm head can be used as the shield arm head, so as to check the hoisting parts in the shield hoisting condition.
  • the force status of each lifting point can be detected in real time to ensure the force balance of each lifting point and improve the stability and safety of hoisting operations.
  • Fig. 1 is the structure schematic diagram when the multi-working-condition truss arm head and the transfer arm section are connected using the second tension plate structure in the present application;
  • Fig. 2 is a structural schematic diagram of the multi-working condition truss arm head using the second pull plate structure in the present application
  • Fig. 3 is a structural schematic diagram of the multi-working-condition truss arm head using the first pull plate structure in the present application
  • Fig. 4 is the structural representation of the second drawing board structure in the present application.
  • Fig. 5 is the exploded schematic view of the second drawing plate structure in the present application.
  • Fig. 6 is a structural schematic diagram of the first draw plate structure in the present application.
  • the Z-axis in the drawings represents the vertical direction, that is, the up and down position, and the positive direction of the Z-axis (that is, the arrow pointing to the Z-axis) represents the top, and the reverse of the Z-axis represents the bottom;
  • the X-axis in the drawings represents the horizontal direction , and specified as the left and right positions, and the positive direction of the X-axis represents the left side, and the reverse direction of the X-axis represents the right side;
  • the Y-axis in the attached figure represents the front-rear position, and the positive direction of the Y-axis represents the front side, and the Y-axis Reverse represents the rear side; at the same time, it should be noted that the meanings of the aforementioned Z-axis, Y-axis and X-axis are only for the convenience of describing the application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific Orientation, construction and operation in a
  • the present application provides a multi-working-condition truss arm head (hereinafter referred to as the truss arm head), which includes the arm head main body 1, the door frame 2, the first tie plate structure 3 and the second tie plate structure 4.
  • the truss arm head includes the arm head main body 1, the door frame 2, the first tie plate structure 3 and the second tie plate structure 4.
  • the main body of the arm head 1 has a first end and a second end
  • the door frame 2 has a first end and a second end
  • the lower part of the first end of the door frame 2 It is rotatably connected with the lower part of the second end of the arm head main body 1, and the second end of the mast 2 is suitable for connecting with the transfer jib section 70; wherein, in the wind power hoisting condition, the upper part of the first end of the mast 2 passes through the first
  • the pull plate structure 3 is rotationally connected with the upper part of the second end of the main body of the arm head 1; in the case of shield hoisting, the upper part of the first end of the mast 2 is connected with the upper part of the second end of the main body of the arm head 1 through the second pull plate structure 4 Turn to connect.
  • the first end of the arm head main body 1 refers to the end of the arm head main body 1 located in the positive direction of the Y axis in FIG.
  • the front end of the arm head main body 1 is located in the positive direction of the Z axis, which is also the upper part of the front end of the arm head main body 1, and the lower part of the first end of the arm head main body 1 refers to the position where the front end of the arm head main body 1 is located in the reverse direction of the Z axis. It is also the lower part of the front end of the arm head main body 1.
  • the second end of the arm head main body 1 refers to the end of the arm head main body 1 located in the opposite direction of the Y axis in Figure 1, which is also the rear end of the arm head main body 1.
  • the upper part of the second end of the main body 1 refers to the position where the rear end of the main body 1 of the arm head is located in the positive direction of the Z axis, which is also the upper part of the rear end of the main body 1 of the arm head.
  • the lower part of the second end of the main body 1 of the arm head refers to the arm The rear end of the head main body 1 is located at the opposite position of the Z axis, which is also the lower rear end of the arm head main body 1 .
  • the expression meaning of the door frame 2 in various positions is the same as that of the arm head main body 1.
  • the heavy object is hung on the front end of the jib main body 1, that is to say, the front end of the jib main body 1 is also the end where the jib main body 1 and the heavy object are connected and lifted by a wire rope.
  • the truss arm head is provided with the first pull plate structure 3 and the second pull plate structure 4, and the tension detection device 43 is set in the second pull plate structure 4.
  • the truss arm head is inclined downward at a certain angle, and this angle meets the needs of the wind power hoisting industry, so that the truss arm head can be used as a wind power arm head, so that the truss arm head can be used in wind power hoisting conditions.
  • the installation efficiency is high; when the upper rear end of the arm head main body 1 is connected to the upper front end of the door frame 2 through the second pull plate structure 4, the truss While the arm head is inclined downward at a certain angle, due to the setting of the tension detection device 43, the truss arm head can also detect the tension of the second tie plate structure 4, so that the truss arm head can be used as a shield arm head , so that when the hoisting parts are flipped and hoisted in the shield hoisting condition (such as hoisting the shield machine or its components, etc.), the force state of each hoisting point can be detected in real time to ensure the force balance of each hoisting point and improve The stability and safety of hoisting operations.
  • the shield hoisting condition such as hoisting the shield machine or its components, etc.
  • tension sensor is preferably used as the tension detection device 43.
  • the tension sensor is small in size, convenient to be installed in the second pull plate structure 4, and is easy to obtain in the market with low cost.
  • the second pull plate structure 4 includes a front pull plate 41 , a rear pull plate 42 and a tension detection device 43 ;
  • the rear pull plate 42 is used for rotating connection with the second end upper part of the arm head main body 1;
  • the front pull plate 41 has a first cavity 411
  • the rear pull plate 42 has a second cavity 421, and the first cavity 411 Communicate with the second cavity 421, a part of the tension detection device 43 is accommodated in the first cavity 411 and connected with the front pull plate 41, and the other part of the tension detection device 43 is accommodated in the second cavity 421 and connected with the rear pull plate 42 connections.
  • the second pull plate structure 4 is a split structure, the front end of the pull force detection device 43 is connected to the front pull plate 41, the rear end of the pull force detection device 43 is connected to the rear pull plate 42, and the front half of the pull force detection device 43 accommodates In the first cavity 411 of the front pull plate 41 , the second half of the tension detection device 43 is accommodated in the second cavity 421 of the rear pull plate 42 .
  • the front pull plate 41 and the rear pull plate 42 are set to have a cavity structure with a first cavity 411 and a second cavity 421 respectively, and the tension detection device 43 is installed in the first cavity 411 and the second cavity 421 can protect the tension detection device 43 from being hit by other objects, thereby reducing the damage probability of the tension detection device 43 and prolonging the service life.
  • the front pull plate 41 is provided with a first connection hole 415
  • the rear pull plate 42 is provided with a second connection hole 425
  • the tension detection device 43 is provided with a third connection hole 431 and the fourth connection hole 432
  • one end of the tension detection device 43 is connected with the front pull plate 41 at the third connection hole 431 and the first connection hole 415 by a pin
  • the other end of the tension detection device 43 is connected with the rear pull plate 42 at the third connection hole 431 and the first connection hole 415.
  • the fourth connecting hole 432 and the second connecting hole 425 are connected by pins.
  • the front pull plate 41 includes a first side vertical plate 412 provided with a first mounting hole 4121 , a second side vertical plate 413 provided with a second mounting hole 4131 , and two oppositely disposed
  • the second connecting plate 414, the first side vertical plate 412, the second side vertical plate 413 and the two second connecting plates 414 together form a first cavity 411, and the first mounting hole 4121 and the second mounting hole 4131 are coaxial
  • the front pull plate 41 is hinged to the upper rear end of the arm head main body 1 at the first mounting hole 4121 and the second mounting hole 4131 through pin shafts.
  • the first side vertical plate 412 and the second side vertical plate 413 are arranged opposite to each other in the left and right directions with a distance
  • the second connecting plate 414 is arranged opposite to and connected in the vertical direction and connects the first side vertical plate 412 and the second side vertical plate 413, one end of the first side vertical plate 412 provided with the first mounting hole 4121 and one end of the second side vertical plate 413 provided with the second mounting hole 4131 form a double fork structure, correspondingly, the upper rear end of the arm head main body 1
  • a single yoke structure is provided, and the single yoke structure is provided with a first hinge hole, and the front pull plate 41 and The hinge between the upper rear end of the arm head main body 1 has a simple structure and is easy to assemble and disassemble.
  • the rear pull plate 42 includes a third side vertical plate 422 provided with a third mounting hole 4221 , a fourth side vertical plate 423 provided with a fourth mounting hole, and two oppositely disposed
  • the three connecting plates 424, the third side vertical plate 422, the fourth side vertical plate 423 and the two third connecting plates 424 together form a second cavity 421, and the third mounting hole 4221 and the fourth mounting hole are arranged coaxially,
  • the rear pull plate 42 is hinged to the upper part of the first end of the door frame 2 at the third mounting hole 4221 and the fourth mounting hole through pin shafts.
  • the third side vertical plate 422 and the fourth side vertical plate 423 are arranged opposite to each other in the left and right direction with a distance
  • the third connecting plate 424 is arranged opposite to and connected in the vertical direction and connects the third side vertical plate 422 and the fourth side vertical plate 423
  • the third side vertical plate 422 is provided with one end of the third mounting hole 4221
  • the fourth side vertical plate 423 is provided with the end of the fourth mounting hole to form a double fork structure
  • the upper front end of the door frame 2 is provided with a single ear plate structure
  • the single ear plate structure is provided with a second hinge hole, by inserting the pin shaft into the third installation hole 4221, the second hinge hole and the fourth installation hole in sequence to realize the connection between the rear pull plate 42 and the door frame 2
  • the hinge between the upper parts of the front end has a simple structure and is convenient for disassembly and assembly.
  • the first side vertical plate 412 and the third side vertical plate 422 are located on the same side of the second pull-plate structure 4 , and in the length direction of the second pull-plate structure 4 , the first side The gap between the vertical plate 412 and the third side vertical plate 422 is between 0-2mm.
  • the length direction of the second tension plate structure 4 refers to the Y-axis direction in the figure, which is also the front-to-back direction.
  • the gap between the first side vertical plate 412 and the third side vertical plate 422 on the same side is set in the range of 0-2 mm, so that when the front pull plate 41 and the rear pull plate 42 are relatively rotated , the rotation angle is very small, and the tension detection device 43 arranged in the first cavity 411 and the second cavity 421 will not interfere with the second connection plate 414 or the third connection plate 424, thereby further protecting the tension detection device 43 not be damaged; moreover, the gap limits the relative rotation between the front pull plate 41, the rear pull plate 42 and the tension detection device 43, which can further prevent the whole truss arm head from tilting backward.
  • the second side vertical plate 413 and the fourth side vertical plate 423 are located on the same side of the second pull-plate structure 4 , and between the second side vertical plate 413 and the fourth side vertical plate 423 There is a gap and an avoidance notch 44 is formed, and the avoidance notch 44 is suitable for avoiding the protrusion on the tension detection device 43 .
  • the first pull plate structure 3 includes two oppositely arranged fifth side vertical plates 31 and two oppositely disposed first connecting plates 32 , and the length direction of the fifth side vertical plate 31 is
  • the fifth installation hole 311 is provided at both ends of the first pull plate structure 3, and the two ends on the length direction of the first pull plate structure 3 are respectively connected with the upper part of the first end of the door frame 2 and the upper part of the second end of the arm head main body 1 in the fifth installation hole. 311 places are hinged by pin shafts.
  • the length direction of the fifth side vertical plate 31 refers to the Y-axis direction in the figure, which is also the front-to-back direction.
  • the first pull plate structure 3 includes two fifth side vertical plates 31 and two first connecting plates 32, the two fifth side vertical plates 31 are arranged opposite to each other in the left and right directions with a distance between them, and the two first connecting plates Plate 32 is set up and down direction oppositely and connects two fifth side vertical plates 31, and the front and rear ends of the fifth side vertical plates 31 are all provided with the fifth installation hole 311, makes the front and rear sides of two fifth side vertical plates 31
  • the end constitutes a double fork structure, correspondingly, the upper rear end of the arm head main body 1 is provided with a single fork structure, and the single fork structure is provided with a first hinge hole, and the upper front end of the door frame 2 is provided with a single ear plate structure, and the single ear plate structure is provided with a second hinge hole.
  • the hinge between the front end of the first pull plate structure 3 and the rear end upper part of the arm head main body 1 is realized by inserting the pin shaft into the fifth mounting hole 311 and the first hinge hole at the front end of the fifth side vertical plate 31, by inserting the pin
  • the shaft is inserted into the fifth installation hole 311 and the second hinge hole at the rear end of the fifth side vertical plate 31 to realize the hinge between the rear end of the first pull plate structure 3 and the upper front end of the door frame 2.
  • the structure is simple and easy to disassemble.
  • the multi-working-condition truss arm head also includes a reversing pulley block 5 and a hoisting pulley block 6, the reversing pulley block 5 is arranged on the upper end of the arm head main body 1, and the hoisting pulley block 6 is arranged on The lower part of the first end of the main body 1 of the arm head.
  • the upper end of the arm head main body 1 refers to the end of the arm head main body 1 located in the positive direction of the Z-axis in the figure
  • the lower end of the arm head main body 1 refers to the end of the arm head main body 1 located in the opposite direction of the Z-axis in the figure .
  • the reversing pulley block 5 is fixed on the upper end of the arm head main body 1 through a pin shaft, and the hoisting pulley block 6 is fixed on the lower front end of the arm head main body 1 through a pulley shaft.
  • the reversing pulley block 5 is fixed at the pull plate structure, so that the fixation of the reversing pulley block 5 is more stable, and the design structure of the first pull plate structure 3 or the second pull plate structure 4 is simplified, which is convenient for light weight. Quantitative design.
  • the present application also provides a crane, including a main boom, an adapter jib section 70 and the above-mentioned multi-working-condition truss jib head, one end of the adapter jib section 70 is connected to the main boom, and the other end of the adapter jib section 70 One end is connected with the second end of the gantry 2 of the multi-working condition truss arm head.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)

Abstract

Tête de flèche en treillis pour conditions de travail multiples et grue. La tête de flèche en treillis pour conditions de travail multiples comprend : un corps principal de tête de flèche (1) ayant une première extrémité et une seconde extrémité ; un portique (2) ayant une première extrémité et une seconde extrémité, la partie inférieure de la première extrémité du portique (2) étant reliée rotative à la partie inférieure de la seconde extrémité du corps principal de tête de flèche (1), et la seconde extrémité du portique (2) étant apte à être reliée à une section flèche à adaptateur (70) ; et des premières structures de plaque de traction (3) et des secondes structures de plaque de traction (4), un dispositif de détection de force de traction (43) étant disposé dans chaque seconde structure de plaque de traction (4). En condition de travail de levage par temps venteux, la partie supérieure de la première extrémité du portique (2) est reliée rotative à la partie supérieure de la seconde extrémité du corps principal de tête de flèche (1) au moyen des premières structures de plaque de traction (3) ; en condition de travail de levage avec bouclier, la partie supérieure de la première extrémité du portique (2) est reliée rotative à la partie supérieure de la seconde extrémité du corps principal de tête de flèche (1) au moyen des secondes structures de plaque de traction (4). La tête de flèche en treillis pour conditions de travail multiples peut être utilisée en tant que tête de flèche par temps venteux, ou peut être utilisée en tant que tête de flèche à bouclier pour satisfaire à différentes conditions de travail en utilisation.
PCT/CN2022/102102 2021-06-30 2022-06-29 Tête de flèche en treillis pour conditions de travail multiples et grue WO2023274263A1 (fr)

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CN202121478395.8 2021-06-30
CN202121478395.8U CN215711311U (zh) 2021-06-30 2021-06-30 一种多工况桁架臂头及起重机

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN215711311U (zh) * 2021-06-30 2022-02-01 湖南三一中型起重机械有限公司 一种多工况桁架臂头及起重机

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CN205367536U (zh) * 2016-01-28 2016-07-06 徐州建机工程机械有限公司 一种动臂式起重机及其起重臂
CN215711311U (zh) * 2021-06-30 2022-02-01 湖南三一中型起重机械有限公司 一种多工况桁架臂头及起重机

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Publication number Priority date Publication date Assignee Title
US20060096940A1 (en) * 2004-11-06 2006-05-11 Hans-Dieter Willim Crane boom
DE202007012764U1 (de) * 2007-09-12 2009-02-12 Liebherr-Werk Ehingen Gmbh Auslegerkran, Hilfsausleger und Zwischenstück
CN202296908U (zh) * 2011-10-09 2012-07-04 上海三一科技有限公司 用于履带起重机的吊装机构及履带起重机
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CN105584939A (zh) * 2014-10-23 2016-05-18 郑州宇通重工有限公司 一种风电吊装专用臂头
CN104591013A (zh) * 2014-12-25 2015-05-06 徐州重型机械有限公司 一种多工况副臂结构及使用该结构的起重机
CN205367536U (zh) * 2016-01-28 2016-07-06 徐州建机工程机械有限公司 一种动臂式起重机及其起重臂
CN215711311U (zh) * 2021-06-30 2022-02-01 湖南三一中型起重机械有限公司 一种多工况桁架臂头及起重机

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