CN107311069B - A kind of lifting device for construction - Google Patents
A kind of lifting device for construction Download PDFInfo
- Publication number
- CN107311069B CN107311069B CN201710657471.3A CN201710657471A CN107311069B CN 107311069 B CN107311069 B CN 107311069B CN 201710657471 A CN201710657471 A CN 201710657471A CN 107311069 B CN107311069 B CN 107311069B
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- CN
- China
- Prior art keywords
- lifter plate
- wirerope
- plate
- lifting device
- locating rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- 238000010276 construction Methods 0.000 title claims abstract description 37
- 230000001681 protective effect Effects 0.000 claims description 11
- 230000000694 effects Effects 0.000 abstract description 11
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000013016 damping Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
- B66F7/02—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms suspended from ropes, cables, or chains or screws and movable along pillars
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F17/00—Safety devices, e.g. for limiting or indicating lifting force
- B66F17/006—Safety devices, e.g. for limiting or indicating lifting force for working platforms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
- B66F7/10—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported directly by jacks
- B66F7/16—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported directly by jacks by one or more hydraulic or pneumatic jacks
- B66F7/18—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported directly by jacks by one or more hydraulic or pneumatic jacks by a single central jack
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
- B66F7/28—Constructional details, e.g. end stops, pivoting supporting members, sliding runners adjustable to load dimensions
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Structural Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Types And Forms Of Lifts (AREA)
Abstract
The present invention relates to a kind of lifting devices for construction, including support frame, fixed plate, first support plate, hydraulic cylinder and sliding bar, support frame as described above is an integral structure with fixed plate, and fixed plate is respectively welded support base and safety basement, first support plate is fixed on support frame, and first is fixedly installed with hoist engine in support plate, wirerope is provided on the hoist engine, and wirerope fits with movable pulley, the both ends of the movable pulley are flexibly connected with support frame, piston rod is provided on the hydraulic cylinder, second support plate is an integral structure by fixing piece and locating rod, the fixing piece is passed through from sliding groove, the locating rod is passed through from safety basement, the sliding bar is passed through from lifter plate.The lifting device for being used for construction is provided with hoist engine and hydraulic cylinder, and two kinds promoted using elevator machine travel and hydraulic cylinder combine mode as the up-down mode of the device, and such safety is higher, and it is good to go up and down effect.
Description
Technical field
The present invention relates to construction equipment technical field, specially a kind of lifting device for construction.
Background technique
Construction refers to the production activity of engineering construction implementation phase, is the building course of all kinds of buildings, can also be with
It says it is various lines on design drawing, in specified place, becomes process in kind.It includes basic engineering construction, master
Body structure construction, roof construction, decorative engineering construction etc..The place of construction operation is known as " construction site " or cries
" construction site ", is also named building site.With the rapid development of construction industry, lifting device is often needed to use in the construction process
Carry out the conveying of cargo
Lifting device was indispensable vertical transportation machinery in construction, from First Domestic rack-and-pinion in 1973
Since formula building hoist is born, after continuous development in more than 30 years, elevator was in structure type, function, purposes, safety device
Etc. many aspects have very big change and progress.
The structure of existing lifting device is simple, when transporting cargo, is easy to appear the phenomenon that cargo falls, there are peaces
Full hidden danger, safety is lower, while up-down mode is single, not very practical, the use demand of people is not able to satisfy, in view of above
Defect existing in the prior art, it is necessary to be further improved, make it more for practicability, can just meet actual use feelings
Condition.
Summary of the invention
The purpose of the present invention is to provide a kind of lifting devices for construction, to solve to mention in above-mentioned background technique
The structure of existing lifting device out is simple, when transporting cargo, is easy to appear the phenomenon that cargo falls, and safety is lower,
The problem of up-down mode is single simultaneously, and there are security risks, not very practical, is not able to satisfy the use demand of people.
To achieve the above object, the invention provides the following technical scheme: a kind of lifting device for construction, including
Support frame, fixed plate, the first support plate, hydraulic cylinder and sliding bar, support frame as described above are an integral structure with fixed plate, and fixed
Plate is respectively welded support base and safety basement, and first support plate is fixed on support frame, and solid in the first support plate
Dingan County is equipped with hoist engine, is provided with wirerope on the hoist engine, and wirerope fits with movable pulley, and the two of the movable pulley
End is flexibly connected with support frame, piston rod is provided on the hydraulic cylinder, and hydraulic cylinder is fixed in the second support plate, and described the
Two support plates are an integral structure by fixing piece and locating rod, and the fixing piece is passed through from sliding groove, the locating rod from
It is passed through in safety basement, and the bottom end of locating rod is provided with cushion socket, sliding groove, the sliding is offered on the safety basement
Bar is passed through from lifter plate, and the bottom end of sliding bar is welded in fixed plate, and the lifter plate includes the first lifter plate, second
Lifter plate, connecting rod and fixing groove, and the bottom end surface of the first lifter plate is provided with connecting rod, while the top of the second lifter plate
Fixing groove is offered, the connecting rod is mutually engaged with fixing groove.
Preferably, the wirerope includes main rope, secondary wirerope, connector, sponge protective case, shield, and
Main rope is connected with secondary wirerope by connector, while secondary wirerope connects by the way that connector and the second lifter plate are fixed
It connects, sponge protective case is enclosed on the pair wirerope, and the both ends of secondary wirerope are located inside shield, and shield is installed
In on connector.
Preferably, the main rope is connected with four secondary wirerope, and A shaft centre line of the secondary wirerope about lifter plate
It is symmetrical arranged.
Preferably, first lifter plate and the second lifter plate top end surface are in same level, and the first lifter plate
Top end surface be in concave-convex striated structure, while the both ends of the first lifter plate are connected with the top of piston rod.
Preferably, the connecting rod and the equal rectangular array distribution of fixing groove, and the tapered structure in connecting rod bottom end.
Preferably, the spacing between the second support plate end face outside is equal to the length of the first lifter plate, and first liter
Drop plate and the second support plate are parallel to each other.
Preferably, the top of the locating rod is fixedly welded with the second lifter plate, and the length of locating rod is less than sliding bar
Length.
Preferably, the bottom end of the locating rod fits with cushion socket top end surface, and locating rod and cushion socket one are a pair of
It answers.
Preferably, the length of the sliding groove and the height of safety basement are consistent.
Compared with prior art, the beneficial effects of the present invention are: the lifting device for being used for construction is provided with elevator
Machine and hydraulic cylinder, two kinds promoted using elevator machine travel and hydraulic cylinder combine mode as the liter of the lifter plate of the device
Drop mode, such safety is higher, and lifting effect is good, and when operation irregularity occurs in hydraulic cylinder, lifter plate will not be fallen at once
Get off, be not in the phenomenon that cargo falls, prevented security risk, while being provided with locating rod, when there is wire cable rupture
When, it is ensured that the phenomenon that lifter plate is not in inclination further improves safety so that lifter plate smoothly falls
Property, at the same by cushion socket can reduce lifter plate fall when impact force, have certain damping effect, protect equipment not by
Damage, long service life, main rope are connected with four secondary wirerope, and A shaft centre line pair of the secondary wirerope about lifter plate
The phenomenon that title setting, such hoist engine is more steady during passing through rope hoisting lifter plate, is not in inclination, together
When cargo be not easy to slide from lifter plate, using effect is good, is provided with shield, can prevent because of secondary wire cable rupture,
Entire wirerope is quickly thrown away, and cooperates sponge protective case, when can prevent wirerope from throwing away, because dynamics it is excessive to cargo caused by damage
It is bad, it is possible to reduce loss, using effect are good.
Detailed description of the invention
Fig. 1 is a kind of positive structure diagram of the lifting device for construction of the present invention；
Fig. 2 is that a kind of wirerope of the lifting device for construction of the present invention connect side view structural representation with lifter plate
Figure；
Fig. 3 is a kind of wirerope enlarged structure schematic diagram of the lifting device for construction of the present invention；
Fig. 4 is lifter plate and the signal of safety basement side view structure of a kind of lifting device for construction of the present invention
Figure；
Fig. 5 is the present invention a kind of the second support plate and safety basement local overlooking knot of the lifting device for construction
Structure schematic diagram.
In figure: 1, support frame, 2, fixed plate, 3, support base, the 4, first support plate, 5, hoist engine, 6, wirerope, 601,
Main rope, 602, secondary wirerope, 603, connector, 604, sponge protective case, 605, shield, 7, lifter plate, 701, first
Lifter plate, the 702, second lifter plate, 703, connecting rod, 704, fixing groove, 8, movable pulley, 9, hydraulic cylinder, 10, piston rod, 11,
Two support plates, 12, fixing piece, 13, safety basement, 14, locating rod, 15, sliding bar, 16, cushion socket, 17, sliding groove.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Fig. 1-5 is please referred to, the present invention provides a kind of technical solution: a kind of lifting device for construction, including branch
Support 1, fixed plate 2, support base 3, the first support plate 4, hoist engine 5, wirerope 6, main rope 601, secondary wirerope 602,
Connector 603, sponge protective case 604, shield 605, lifter plate 7, the first lifter plate 701, the second lifter plate 702, connecting rod
703, fixing groove 704, movable pulley 8, hydraulic cylinder 9, piston rod 10, the second support plate 11, fixing piece 12, safety basement 13, positioning
Bar 14, sliding bar 15, cushion socket 16 and sliding groove 17, support frame 1 are an integral structure with fixed plate 2, and fixed plate 2 is welded respectively
It is connected to support base 3 and safety basement 13, the first support plate 4 is fixed on support frame 1, and is fixedly mounted in the first support plate 4
There is hoist engine 5, wirerope 6 is provided on hoist engine 5, and wirerope 6 fits with movable pulley 8, wirerope 6 includes king wire
Rope 601, secondary wirerope 602, connector 603, sponge protective case 604, shield 605, and main rope 601 and secondary wirerope
602 are connected by connector 603, while secondary wirerope 602 is fixedly connected by connector 603 with the second lifter plate 702, secondary
Sponge protective case 604 is enclosed on wirerope 602, and the both ends of secondary wirerope 602 are located inside shield 605, and shield
605 are installed on connector 603, and main rope 601 is connected with four secondary wirerope 602, and secondary wirerope 602 is about lifter plate
7 A shaft centre line is symmetrical arranged, and lifter plate 7 can smoothly be driven to carry out raising and lowering, when appearance one secondary wirerope
When 602 fracture, it will not influence and too much influence is caused to lifter plate 7, safety is higher, and the both ends of movable pulley 8 and support frame 1 are living
It is dynamic to connect, it is provided with piston rod 10 on hydraulic cylinder 9, and hydraulic cylinder 9 is fixed in the second support plate 11,11 outside of the second support plate
Spacing between end face is equal to the length of the first lifter plate 701, and the first lifter plate 701 and the second support plate 11 are parallel to each other,
It is structurally reasonable to which hydraulic cylinder 9 can drive the stable raising and lowering of the first lifter plate 701 by piston rod 10, second
Fagging 11 is an integral structure by fixing piece 12 with locating rod 14, the top of locating rod 14 and the fixed weldering of the second lifter plate 702
It connects, and the length of locating rod 14 is less than the length of sliding bar 15, the length of locating rod 14 is that hoist engine 5 is pulled by wirerope 6
7 range of lifter plate, thus hoist engine 5 traction and hydraulic cylinder 9 promoted two kinds can combine carry out use safety
Height, bottom end and 16 top end surface of cushion socket of locating rod 14 fit, and locating rod 14 and cushion socket 16 correspond, to make
When obtaining the whereabouts of locating rod 14, it can fairly fall on cushion socket 16, good damping effect, fixing piece 12 is worn from sliding groove 17
It crosses, the length of sliding groove 17 is consistent with the height of safety basement 13, it can guarantee that fixing piece 12 has enough movings range, thus
Enable the second support plate 11 as locating rod 14 freely moves up and down, locating rod 14 is worn from safety basement 13
It crosses, and the bottom end of locating rod 14 is provided with cushion socket 16, offers sliding groove 17 on safety basement 13, sliding bar 15 is from lifter plate
It is passed through in 7, lifter plate 7 includes the first lifter plate 701, the second lifter plate 702, connecting rod 703 and fixing groove 704, and first
The bottom end surface of lifter plate 701 is provided with connecting rod 703, while the top of the second lifter plate 702 offers fixing groove 704, even
Extension bar 703 is engaged with 704 phase of fixing groove, when the first lifter plate 701 falls because of the failure of hydraulic cylinder 9, passes through connecting rod
703 with fixing groove 704, the first lifter plate 701 can be made to be sticked on the second lifter plate 702, prevented on the first lifter plate 701
Cargo fall, using effect is good, and the first lifter plate 701 and 702 top end surface of the second lifter plate are in same level, and
The top end surface of one lifter plate 701 is in concave-convex striated structure, while the top phase at the both ends of the first lifter plate 701 and piston rod 10
The surface of connection, the first lifter plate 701 and the second lifter plate 702 is in a plane, places article, and first liter convenient for people
Dropping 701 surface of plate has antiskid effect, and article is not easy to slip down from the first lifter plate 701, structurally reasonable, connecting rod 703
It is distributed with the equal rectangular array of fixing groove 704, and the tapered structure in 703 bottom end of connecting rod, when connecting rod 703 falls, is convenient for
Connecting rod 703 fastens with fixing groove 704, so that connecting rod 703 be avoided to touch the notch edge of fixing groove 704, influences card
Effect is closed, and the bottom end of above-mentioned sliding bar 15 is welded in fixed plate 2.
The working principle of the present embodiment: this is used for the lifting device of construction, in use, can pass through support base 3
It is with safety basement 13 that the device fixed placement is good, when needing to carry out conveying articles, cargo is placed on lifter plate 7, is made
Hoist engine 5 powers on and makes its start-up operation, and hoist engine 5 starts constantly to furl wirerope 6 by movable pulley 8, thus logical
Crossing main rope 601 and secondary wirerope 602 can smoothly drive lifter plate 7 to be risen along sliding bar 15, on lifter plate 7
Locating rod 14 can be equally driven to rise during rising, locating rod 14 is carried out in sliding groove 17 by fixing piece 12 to moving up
It is dynamic, and then the second support plate 11 is driven to rise, such second support plate 11 is just moved up as lifter plate 7 synchronizes, when secondary steel
When the top or bottom end of cord 602 are broken, shield 605 can be blocked secondary wirerope 602, prevent it from quickly throwing away,
And then impact force when secondary wirerope 602 is thrown away is reduced, fracture occur among wirerope 602 makes, and sponge protective case 604 can be with
It plays a protective role, prevents wirerope 602 from damaging when throwing away to cargo, when arriving certain altitude by the promotion of hoist engine 5,
Hoist engine 5 stops working, and at this time powers on hydraulic cylinder 9 and makes its start-up operation, and hydraulic cylinder 9 drives the by piston rod 10
One lifter plate 701 rises, and then carries out being delivered up material, and when there is 9 operation irregularity of hydraulic cylinder, the first lifter plate 701 exists
It can be dropped into dropping process on the second lifter plate 702, lifter plate 7 can be prevented by main rope 601 and secondary wirerope 602
It falls down, so as to prevent cargo from falling bring security risk, when there is the fracture of wirerope 6, in locating rod 14
Under effect, lifter plate 7 is by the slide downward on safety basement 13 of locating rod 14, so that guaranteeing is not in because wirerope 6 is disconnected
Splitting causes lifter plate 7 the phenomenon that inclination causes cargo to fall occur, can be quick to locating rod 14 under the action of cushion socket 16
Impact force when whereabouts carries out certain buffering, ensure that equipment is not damaged, improves its service life, and here it is the devices
Whole work process.
Although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art,
It is still possible to modify the technical solutions described in the foregoing embodiments, or part of technical characteristic is carried out etc.
With replacement, all within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in this
Within the protection scope of invention.
Claims (9)
1. a kind of lifting device for construction, including support frame (1), fixed plate (2), the first support plate (4), hydraulic cylinder
(9) and sliding bar (15), it is characterised in that: support frame as described above (1) is an integral structure with fixed plate (2), and fixed plate (2) point
It is not welded with support base (3) and safety basement (13), first support plate (4) is fixed on support frame (1), and first
It is fixedly installed on fagging (4) hoist engine (5), is provided with wirerope (6) on the hoist engine (5), and wirerope (6) and dynamic cunning
Wheel (8) fits, and the both ends of the movable pulley (8) are flexibly connected with support frame (1), are provided with piston on the hydraulic cylinder (9)
Bar (10), and hydraulic cylinder (9) is fixed on the second support plate (11), it is fixing piece (12) and fixed that second support plate (11) passes through
Position bar (14) is an integral structure, and the fixing piece (12) passes through from sliding groove (17), and the locating rod (14) is from safety bottom
It is passed through in seat (13), and the bottom end of locating rod (14) is provided with cushion socket (16), offers sliding on the safety basement (13)
Slot (17), the sliding bar (15) passes through from lifter plate (7), and the bottom end of sliding bar (15) is welded on fixed plate (2), institute
Stating lifter plate (7) includes the first lifter plate (701), the second lifter plate (702), connecting rod (703) and fixing groove (704), and
The bottom end surface of first lifter plate (701) is provided with connecting rod (703), while the top of the second lifter plate (702) offers admittedly
Determine slot (704), the connecting rod (703) is mutually engaged with fixing groove (704).
2. a kind of lifting device for construction according to claim 1, it is characterised in that: the wirerope (6)
It include main rope (601), secondary wirerope (602), connector (603), sponge protective case (604), shield (605), and
Main rope (601) is connected with secondary wirerope (602) by connector (603), while secondary wirerope (602) passes through connector
(603) it is fixedly connected, is enclosed with sponge protective case (604) on the pair wirerope (602), and secondary with the second lifter plate (702)
It is internal that the both ends of wirerope (602) are located at shield (605), and shield (605) is installed on connector (603).
3. a kind of lifting device for construction according to claim 2, it is characterised in that: the main rope
(601) four secondary wirerope (602) are connected with, and secondary wirerope (602) is symmetrical arranged about the A shaft centre line of lifter plate (7).
4. a kind of lifting device for construction according to claim 1, it is characterised in that: first lifter plate
(701) it is in same level with the second lifter plate (702) top end surface, and the top end surface of the first lifter plate (701) is in recessed
Convex striated structure, while the both ends of the first lifter plate (701) are connected with the top of piston rod (10).
5. a kind of lifting device for construction according to claim 1, it is characterised in that: the connecting rod
(703) it is distributed with fixing groove (704) rectangular array, and the tapered structure in connecting rod (703) bottom end.
6. a kind of lifting device for construction according to claim 1, it is characterised in that: second support plate
(11) spacing between end face outside is equal to the length of the first lifter plate (701), and the first lifter plate (701) and the second support plate
(11) it is parallel to each other.
7. a kind of lifting device for construction according to claim 1, it is characterised in that: the locating rod (14)
Top be fixedly welded with the second lifter plate (702), and the length of locating rod (14) be less than sliding bar (15) length.
8. a kind of lifting device for construction according to claim 1, it is characterised in that: the locating rod (14)
Bottom end fit with cushion socket (16) top end surface, and locating rod (14) and cushion socket (16) correspond.
9. a kind of lifting device for construction according to claim 1, it is characterised in that: the sliding groove (17)
Length it is consistent with the height of safety basement (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710657471.3A CN107311069B (en) | 2017-08-03 | 2017-08-03 | A kind of lifting device for construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710657471.3A CN107311069B (en) | 2017-08-03 | 2017-08-03 | A kind of lifting device for construction |
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| Publication Number | Publication Date |
|---|---|
| CN107311069A CN107311069A (en) | 2017-11-03 |
| CN107311069B true CN107311069B (en) | 2019-03-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710657471.3A Expired - Fee Related CN107311069B (en) | 2017-08-03 | 2017-08-03 | A kind of lifting device for construction |
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| CN (1) | CN107311069B (en) |
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