CN110510517A - The flexible leg of double girder gantry crane - Google Patents
The flexible leg of double girder gantry crane Download PDFInfo
- Publication number
- CN110510517A CN110510517A CN201910821251.9A CN201910821251A CN110510517A CN 110510517 A CN110510517 A CN 110510517A CN 201910821251 A CN201910821251 A CN 201910821251A CN 110510517 A CN110510517 A CN 110510517A
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- flexible
- leg
- hinge device
- flexible leg
- gantry crane
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- 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.)
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- 238000001514 detection method Methods 0.000 claims abstract description 28
- 238000010276 construction Methods 0.000 claims abstract description 5
- 230000005540 biological transmission Effects 0.000 claims description 12
- 229920000459 Nitrile rubber Polymers 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000012544 monitoring process Methods 0.000 abstract 1
- 238000011084 recovery Methods 0.000 abstract 1
- 230000035882 stress Effects 0.000 description 12
- 238000010586 diagram Methods 0.000 description 7
- 230000001360 synchronised effect Effects 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/16—Applications of indicating, registering, or weighing devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C5/00—Base supporting structures with legs
- B66C5/02—Fixed or travelling bridges or gantries, i.e. elongated structures of inverted L or of inverted U shape or tripods
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Carriers, Traveling Bodies, And Overhead Traveling Cranes (AREA)
Abstract
The present invention provides the flexible legs of double girder gantry crane, comprising: detection wheel apparatus, the detection wheel apparatus are located at rigidity supporting leg and flexible leg bottom, and detection wheel apparatus is mounted on walking mechanism position；Flexible leg strut, the flexible leg strut connection walking mechanism and flexible hinge device, flexible leg strut are multistage splicing construction；Flexible hinge device, the flexibility hinge device connection flexible leg strut and girder truss, flexible hinge device inside are equipped with flexible piece；Flexible piece, the flexible piece are used to buffer and absorb the stress of girder truss；Deviation correcting device, the deviation correcting device are located at the top of flexible leg, and deviation correcting device connects flexible hinge device and girder truss；The present invention is stopped operation by program controlled motor, the synchronization job again after recovery guarantees the stability and security of equipment immediately by the monitoring of the real-time stress variation of correction and walking detection after production offset.
Description
Technical field
The present invention relates to gantry crane technical field more particularly to the flexible legs of double girder gantry crane.
Background technique
Large-scale double girder gantry crane is generally all used for some shipbuilding enterprises, and lifting tonnage is all larger, some lifting tonnages
Reach several hundred tons, the big gantry crane self weight of span just up to more than kiloton, then plus hoisting weight after to the pressure of supporting leg also compared with
Greatly；Gun iron link is all made of such as two side legs, hoisting heavy rear support leg stress cannot discharge, and because frequently lifting by crane and unloading makes
Girder and supporting leg are affected by gravity internal stress and also make frequently to change, and can cause irreversible modeling to steel construction piece intensity smaller part position
Property deformation or recessive security risk；In order to solve the above problems rubber tyre gantry crane design when two side leg sides be rigidity supporting leg, with
Girder connection is integral；The other side is designed to flexible leg, to discharge crane stress；Again because of steel, soft leg two sides weight,
Shape is different (shape has size, and front face area is also different, and windage is also different), and when operation will result in two sides cart operation machine
Structure is asynchronous and gnaws rail, and serious will cause climbs rail and cause serious accident；Large-scale double girder gantry lifting is devised thus
The flexible leg of machine, make flexible leg have large carrying capacity, oil resistant, heat-resisting, wear-resisting, ageing-resistant characteristic, and compress after easily
It restores to the original state.
Summary of the invention
The present invention is intended to provide a kind of double girder gantry for overcoming the above problem or at least being partially solved the above problem rises
The flexible leg of heavy-duty machine, to solve to be unable to synchronous walking after flexible leg of gantry crane operation is difficult to accurate judgement offset and offset
Mechanism leads to the problem of failure.
In order to achieve the above objectives, technical solution of the present invention is specifically achieved in that
Of the invention provides the flexible leg of double girder gantry crane, and the gantry crane two sides pass through rigidity respectively
Supporting leg and flexible leg support, rigidity supporting leg and flexible leg top are fixedly connected with girder truss, rigidity supporting leg and flexible leg
Bottom be equipped with walking mechanism, comprising:
Wheel apparatus is detected, the detection wheel apparatus is located at rigidity supporting leg and flexible leg bottom, and detection wheel apparatus is mounted on
Walking mechanism position；
Flexible leg strut, the flexible leg strut connection walking mechanism and flexible hinge device, flexible leg strut are
Multistage splicing construction；
Flexible hinge device, the flexibility hinge device connection flexible leg strut and girder truss, flexible hinge device inside are equipped with
Flexible piece；
Flexible piece, the flexible piece are used to buffer and absorb the stress of girder truss；
Deviation correcting device, the deviation correcting device are located at the top of flexible leg, and deviation correcting device connects flexible hinge device and girder truss.
The detection wheel apparatus is fixedly connected by connecting bracket with walking mechanism, and the connecting bracket other end is fixedly mounted on
On side plate, side plate interior sides are equipped with detection wheel group, and detection wheel group is for detecting wheel apparatus and walking mechanism synchronizing moving, detection wheel group
Photoelectric encoder is installed, photoelectric encoder is detected by PLC program in shaft.
The flexible leg strut is fixedly connected by accepting flange, is accepted and is welded or be bolted between flange, flexible
Inner reinforced plate and liner circle are equipped on the inside of supporting leg strut, inner reinforced plate and liner circle are used for the reinforcement of flexible leg.
The flexibility hinge device includes the flexible seat of honour cooperated up and down and flexible lower seat, and the flexible seat of honour and flexible lower seat pass through
It is socketed cylinder active link, at the top of the flexible seat of honour and flexible lower seat bottom is equipped with bearing plate, right between two pieces of bearing plates
Claim to be equipped with guard plate, guard plate is used for the stress of balancing flexible hinge device.
The flexibility seat of honour is socketed body diameter and connects body diameter greater than flexible lower cover for seat, seat under the flexible seat of honour and flexibility
It is socketed cylindrical inside and is equipped with flexible piece.
The flexible piece is nitrile rubber.
Pin shaft is equipped among the deviation correcting device, pin shaft both sides are symmetrically installed with shift fork, and shift fork is equipped with transmission arm, transmission
It is fixedly connected at the top of arm with girder truss, transmission arm is used for the beat location information of rigidity supporting leg and the asynchronous generation of flexible leg
Transmitting.
The shift fork can be rotated with pin shaft position center, and the shift fork other end is located between two limit switches, and limit switch is logical
Pedestal is crossed to be mounted on flexible hinge device.
The present invention provides the flexible leg of double girder gantry crane, beneficial effect is: detection wheel apparatus passes through program
The start and stop of instruction control walking mechanism, it is synchronous with flexible leg realization to make rigidity supporting leg, and do not need to add any driving force,
Reduce manufacturing cost；The flexible leg pole structure of splicing can be convenient production and transportation；Flexible hinge device uploads weight, under by
Unloading stress is inwardly compressed in the effect of supporting leg support force, flexible hinge device, and flexible hinge device restores to the original state after weight unloading, reaches
Stress purpose is eliminated, guard plate both can be used for the stress of balancing flexible hinge device, also can be used as the rich of girder when Condition of Sudden Unloading
Property rebound and protrude flexible hinge device Hough seam allowance position；Deviation correcting device can effectively control flexible leg and not shift,
When shifting, control program issues the driving motor operation that instruction stops offset side, restores to stop side when two sides are synchronous
Driving motor operation reaches correction purpose.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, required use in being described below to embodiment
Attached drawing be briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this
For the those of ordinary skill in field, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is flexible leg front provided in an embodiment of the present invention overall structure diagram.
Fig. 2 is flexible leg top half structural schematic diagram provided in an embodiment of the present invention.
Fig. 3 be in Fig. 2 provided in an embodiment of the present invention A to structural schematic diagram.
Fig. 4 is flexible hinge apparatus structure schematic diagram provided in an embodiment of the present invention.
Fig. 5 is deviation correcting device positive structure schematic provided in an embodiment of the present invention.
Fig. 6 is deviation correcting device side structure schematic diagram provided in an embodiment of the present invention.
Fig. 7 is deviation correcting device overlooking structure diagram provided in an embodiment of the present invention.
Fig. 8 is detection wheel apparatus structure schematic diagram provided in an embodiment of the present invention.
In figure: 1, girder truss；2, wheel apparatus is detected；21, connecting bracket；22, side plate；23, cover board；24, detection wheel group；
25, photoelectric encoder；3, flexible leg strut；31, walking mechanism；32, flange is accepted；4, flexible hinge device；41, bearing plate；
42, guard plate；43, the flexible seat of honour；44, flexible lower seat；5, flexible piece；6, deviation correcting device；61, transmission arm；62, pin shaft；63, it dials
Fork；64, limit switch；65, pedestal.
Specific embodiment
Exemplary embodiments of the present disclosure are described in more detail below with reference to accompanying drawings.Although showing the disclosure in attached drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure without should be by embodiments set forth here
It is limited.On the contrary, these embodiments are provided to facilitate a more thoroughly understanding of the present invention, and can be by the scope of the present disclosure
It is fully disclosed to those skilled in the art.
Referring to shown in Fig. 1-Fig. 8, the flexible leg of double girder gantry crane provided in an embodiment of the present invention, gantry crane
Two sides pass through rigidity supporting leg and flexible leg support respectively, are fixedly connected with girder truss 1, steel above rigidity supporting leg and flexible leg
Property supporting leg and the bottom of flexible leg be equipped with walking mechanism 31, rigidity supporting leg and flexible leg are in herringbone arrangement, Yi Xiemen
Formula double girder crane because shipbuilding factor influence, sling height is much higher (high up to hundred meters or more), thus design when both ends operation
Mechanism mostly uses larger cardinal distance to guarantee the stability of driving, comprising: detection wheel apparatus 2, flexible leg strut 3, flexible hinge dress
4, flexible piece 5 and deviation correcting device 6 are set, detection wheel apparatus 2 is located at rigidity supporting leg and flexible leg bottom, and detection wheel apparatus 2 is installed
In 31 position of walking mechanism, flexible leg strut 3 connects walking mechanism 31 and flexible hinge device 4, and flexible leg strut 3 is multistage
Splicing construction, flexible hinge device 4 connect flexible leg strut 3 and girder truss 1, and flexible piece 5 is equipped with inside flexible hinge device 4, soft
Property part 5 be used to buffer and absorb the stress of girder truss 1, deviation correcting device 6 is located at the top of flexible leg, and deviation correcting device 6 connects flexibility
Hinge device 4 and girder truss 1.Deviation correcting device 6 makes crane achieve the purpose that two sides operating mechanism is run simultaneously.
As shown in figure 8, detection wheel apparatus 2 is fixedly connected by connecting bracket 21 with walking mechanism 31, connecting bracket 21 is another
One end is fixedly mounted on side plate 22, and detection wheel group 24 is equipped on the inside of side plate 22, is equipped with cover board 23, cover board above detection wheel group 24
23 and side plate 22 prevent dust from entering, detection wheel group 24 is for detecting wheel apparatus 2 and 31 synchronizing moving of walking mechanism, detection wheel group
Photoelectric encoder 25 is installed, photoelectric encoder 25 is detected by PLC program in 24 shafts.When steel, soft side walking mechanism 31 not
PLC issues instruction control side walking mechanism 31 and stops working when synchronous, until when steel, soft leg two sides walking mechanism 31 are synchronous,
The side to stop working could restore automatically；Reach the purpose of synchronous operation；It is larger to detect 2 own wt of wheel apparatus, makes to detect
24 following vehicle of wheel group operation dragging detection wheel group 24 in orbit act, be not required to add any power drive, reduce manufacture at
This.
As shown in Fig. 2, flexible leg strut 3 is fixedly connected by accepting flange 32, welding or spiral shell between flange 32 are accepted
It tethers and connects, inner reinforced plate and liner circle are equipped on the inside of flexible leg strut 3, inner reinforced plate and liner circle are used for the reinforcement of flexible leg.
It accepts flange 32 and is processed into seam allowance formula, connect the shearing force of bolt after flexible leg carrying can be reduced, and be bolted using double,
Increase flanged joint intensity, the structure of splicing can be convenient production and transportation.
As shown in Figure 3 and Figure 4, flexible hinge device 4 includes the flexible seat of honour 43 that cooperates up and down and flexible lower seat 44, in flexibility
By socket cylinder active link, flexible 43 top of the seat of honour and flexible lower 44 bottom of seat are equipped with undertaking for seat 43 and the lower seat 44 of flexibility
Plate 41, guard plate 42 is symmetrically arranged between two pieces of bearing plates 41, and guard plate 42 is used for the stress of balancing flexible hinge device 4；
The flexible seat of honour 43 is socketed body diameter and is greater than the flexible lower socket of seat 44 body diameter, the socket at the flexible seat of honour 43 and flexible lower seat 44
Cylindrical inside is equipped with flexible piece 5；Flexible piece 5 is nitrile rubber.Flexible hinge device 4 uses upper and lower Hafu-type, intermediate there are gap,
When hoisting heavy, driving the flexible leg amount of stressing all concentrate on flexible hinge device 4, loading capacity on flexible hinge device 4, under by
Unloading stress is inwardly compressed in the effect of supporting leg support force, flexible hinge device 4, and flexible hinge device 4 restores to the original state after weight unloading, reaches
To elimination stress purpose.The rich property of girder rebounds and protrudes flexible 4 Hough of hinge device when guard plate 42 also can be used as Condition of Sudden Unloading
Seam allowance position.Guard plate I is disposed on guard plate 42, pin shaft, fastening bolt, guard plate II, guard plate I connect solid with girder
Fixed, guard plate II is connected and fixed with soft leg platform, and fastening bolt is for adjusting distance between guard plate I and guard plate II, safety
It is disposed with pin shaft connecting hole on plate I, the long lumbar hole for adjusting distance up and down is disposed on guard plate II, by positioning card after pin shaft installation
Plate is joined with bolts.
As shown in Fig. 5, Fig. 6 and Fig. 7, pin shaft 62 is equipped among deviation correcting device 6,62 both sides of pin shaft are symmetrically installed with shift fork
63, shift fork 63 is equipped with transmission arm 61, and the top of transmission arm 61 is fixedly connected with girder truss 1, transmission arm 61 for rigidity supporting leg with
The transmitting of the beat location information of the asynchronous generation of flexible leg；Shift fork 63 can be with 62 center rotations of pin shaft, and shift fork 63 is another
End is located between two limit switches 64, and limit switch 64 is mounted on flexible hinge device 4 by pedestal 65, and limit switch 64
Four groups and be symmetrical structure, transmission arm 61 is fixedly mounted in the pre-set hole of shift fork 63.When girder truss 1 and flexible leg are sent out
Transmission arm 61 drives shift fork 63 to rotate when raw offset, 63 head of shift fork trigger limit switch 64 by shifted signal be transmitted to PLC into
Row centralized control, PLC issue the driving motor operation that instruction stops offset side, restore to stop side driving motor when two sides are synchronous
Operation reaches correction purpose.
The above is only embodiments herein, are not intended to limit this application.To those skilled in the art,
Various changes and changes are possible in this application.It is all within the spirit and principles of the present application made by any modification, equivalent replacement,
Improve etc., it should be included within the scope of the claims of this application.
Claims (8)
1. the flexible leg of double girder gantry crane, the gantry crane two sides pass through rigidity supporting leg and flexible leg branch respectively
It is fixedly connected with girder truss (1) above support, rigidity supporting leg and flexible leg, the bottom of rigidity supporting leg and flexible leg is equipped with row
Walk mechanism (31) characterized by comprising
It detects wheel apparatus (2), the detection wheel apparatus (2) is located at rigidity supporting leg and flexible leg bottom, detection wheel apparatus (2) peace
Mounted in walking mechanism (31) position；
Flexible leg strut (3), flexible leg strut (3) connection walking mechanism (31) and flexible hinge device (4), flexibility branch
Leg strut (3) is multistage splicing construction；
Flexible hinge device (4), the flexibility hinge device (4) connect flexible leg strut (3) and girder truss (1), flexible hinge device
(4) internal to be equipped with flexible piece (5)；
Flexible piece (5), the flexible piece (5) are used to buffer and absorb the stress of girder truss (1)；
Deviation correcting device (6), the deviation correcting device (6) are located at the top of flexible leg, and deviation correcting device (6) connects flexible hinge device (4)
With girder truss (1).
2. the flexible leg of double girder gantry crane according to claim 1, which is characterized in that the detection wheel apparatus
(2) it is fixedly connected by connecting bracket (21) with walking mechanism (31), connecting bracket (21) other end is fixedly mounted on side plate
(22) on, detection wheel group (24) are equipped on the inside of side plate (22), detection wheel group (24) is for detecting wheel apparatus (2) and walking mechanism
(31) synchronizing moving is equipped with photoelectric encoder (25) in detection wheel group (24) shaft, and photoelectric encoder (25) passes through program and examines
It surveys.
3. the flexible leg of double girder gantry crane according to claim 1, which is characterized in that the flexible leg strut
(3) it is fixedly connected by accepting flange (32), accepts and weld or be bolted between flange (32), in flexible leg strut (3)
Side is equipped with inner reinforced plate and liner circle, and inner reinforced plate and liner circle are used for the reinforcement of flexible leg.
4. the flexible leg of double girder gantry crane according to claim 1, which is characterized in that the flexibility hinge device
(4) under including the flexible seat of honour (43) cooperated up and down and is flexible seat (44), the flexible seat of honour (43) and flexible lower seat (44) pass through set
Cylinder active link is connect, the flexible seat of honour (43) top and flexible lower seat (44) bottom are equipped with bearing plate (41), hold described in two pieces
It is symmetrically arranged between fishplate bar (41) guard plate (42), guard plate (42) is used for the stress of balancing flexible hinge device (4).
5. the flexible leg of double girder gantry crane according to claim 4, which is characterized in that the flexibility seat of honour (43)
It is socketed body diameter and is greater than flexible lower seat (44) socket body diameter, the socket cylinder of the flexible seat of honour (43) and flexible lower seat (44)
Inside is equipped with flexible piece (5).
6. the flexible leg of double girder gantry crane according to claim 1, which is characterized in that the flexible piece (5) is
Nitrile rubber.
7. the flexible leg of double girder gantry crane according to claim 1, which is characterized in that the deviation correcting device (6)
Centre is equipped with pin shaft (62), and pin shaft (62) both sides are symmetrically installed with shift fork (63), and shift fork (63) is equipped with transmission arm (61), transmission
It is fixedly connected with girder truss (1) at the top of arm (61), transmission arm (61) is used for the inclined of rigidity supporting leg and the asynchronous generation of flexible leg
Put the transmitting of location information.
8. the flexible leg of double girder gantry crane according to claim 1, which is characterized in that the shift fork (63) can be with
The rotation of pin shaft (62) position center, shift fork (63) other end are located between two limit switches (64), and limit switch (64) passes through bottom
Seat (65) is mounted on flexible hinge device (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910821251.9A CN110510517A (en) | 2019-09-02 | 2019-09-02 | The flexible leg of double girder gantry crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910821251.9A CN110510517A (en) | 2019-09-02 | 2019-09-02 | The flexible leg of double girder gantry crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110510517A true CN110510517A (en) | 2019-11-29 |
Family
ID=68630191
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910821251.9A Pending CN110510517A (en) | 2019-09-02 | 2019-09-02 | The flexible leg of double girder gantry crane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110510517A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1332664A (en) * | 1969-10-08 | 1973-10-03 | Wallace Prod Corp B E | Gantries |
| CN102363505A (en) * | 2011-09-13 | 2012-02-29 | 无锡港盛港口机械有限公司 | Upper deviation corrector for gantry cranes |
| CN203295054U (en) * | 2013-06-18 | 2013-11-20 | 山东丰汇设备技术有限公司 | Cart walking following-up device |
| CN103407884A (en) * | 2013-07-16 | 2013-11-27 | 象王重工股份有限公司 | Flexible leg installing structure for double-beam portal crane |
| CN104692245A (en) * | 2015-01-15 | 2015-06-10 | 中铁工程机械研究设计院有限公司 | Automatic correction system and method for traveling of gantry crane |
| CN205772913U (en) * | 2016-05-31 | 2016-12-07 | 中船第九设计研究院工程有限公司 | Lorry deviation correction device for door crane |
| CN211110681U (en) * | 2019-09-02 | 2020-07-28 | 沃得重工(中国)有限公司 | Flexible landing leg of double-beam portal crane |
-
2019
- 2019-09-02 CN CN201910821251.9A patent/CN110510517A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1332664A (en) * | 1969-10-08 | 1973-10-03 | Wallace Prod Corp B E | Gantries |
| CN102363505A (en) * | 2011-09-13 | 2012-02-29 | 无锡港盛港口机械有限公司 | Upper deviation corrector for gantry cranes |
| CN203295054U (en) * | 2013-06-18 | 2013-11-20 | 山东丰汇设备技术有限公司 | Cart walking following-up device |
| CN103407884A (en) * | 2013-07-16 | 2013-11-27 | 象王重工股份有限公司 | Flexible leg installing structure for double-beam portal crane |
| CN104692245A (en) * | 2015-01-15 | 2015-06-10 | 中铁工程机械研究设计院有限公司 | Automatic correction system and method for traveling of gantry crane |
| CN205772913U (en) * | 2016-05-31 | 2016-12-07 | 中船第九设计研究院工程有限公司 | Lorry deviation correction device for door crane |
| CN211110681U (en) * | 2019-09-02 | 2020-07-28 | 沃得重工(中国)有限公司 | Flexible landing leg of double-beam portal crane |
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