CN109987529A - Material lifting device for building industry - Google Patents

Material lifting device for building industry Download PDF

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Publication number
CN109987529A
CN109987529A CN201910147653.5A CN201910147653A CN109987529A CN 109987529 A CN109987529 A CN 109987529A CN 201910147653 A CN201910147653 A CN 201910147653A CN 109987529 A CN109987529 A CN 109987529A
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CN
China
Prior art keywords
control cabinet
elevator
lifting device
transmission case
bevel gear
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201910147653.5A
Other languages
Chinese (zh)
Inventor
陶军军
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to CN201910147653.5A priority Critical patent/CN109987529A/en
Publication of CN109987529A publication Critical patent/CN109987529A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66CCRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00Cranes 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
    • B66C23/16Cranes 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 with jibs supported by columns, e.g. towers having their lower end mounted for slewing movements
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66CCRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00Cranes 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
    • B66C23/18Cranes 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 specially adapted for use in particular purposes
    • B66C23/26Cranes 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 specially adapted for use in particular purposes for use on building sites; constructed, e.g. with separable parts, to facilitate rapid assembly or dismantling, for operation at successively higher levels, for transport by road or rail
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16FSPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/02Suppression 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
    • F16F15/04Suppression 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 using elastic means
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16FSPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F7/00Vibration-dampers; Shock-absorbers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H1/00Toothed gearings for conveying rotary motion
    • F16H1/02Toothed gearings for conveying rotary motion without gears having orbital motion
    • F16H1/20Toothed gearings for conveying rotary motion without gears having orbital motion involving more than two intermeshing members
    • F16H1/22Toothed gearings for conveying rotary motion without gears having orbital motion involving more than two intermeshing members with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts
    • F16H1/222Toothed gearings for conveying rotary motion without gears having orbital motion involving more than two intermeshing members with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with non-parallel axes

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Transportation (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Types And Forms Of Lifts (AREA)

Abstract

The invention relates to the technical field of equipment for buildings, in particular to a material lifting device for the building industry, which comprises a base, a transmission case, a control box, a lifting block, a connecting block, a steel wire rope, a pulley yoke and a hook, wherein the transmission case is arranged on the base; a rotating shaft is arranged at the center of the lifting block in a threaded manner, the upper end of the rotating shaft is rotatably arranged on the inner wall of the top end of the control box, the lower end of the rotating shaft is rotatably arranged on the inner wall of the bottom of the transmission box, and guide mechanisms are symmetrically arranged on the left and right sides of the lifting block; the utility model discloses a gear box, including pivot, straight-teeth gear A, straight-teeth gear B below coaxial arrangement has bevel gear A, bevel gear A and bevel gear B mesh, bevel gear B welded fastening is on the carousel axle. When the lifting device is used for lifting materials in the building industry, the lifting device has the advantages of labor saving in use, convenience in movement, good stability, failure occurrence rate and the like, greatly improves the construction efficiency, is extremely high in practicability, is low in production cost, and is worthy of popularization and use.

Description

A kind of building trade material lifting device
Technical field
The present invention relates to equipment technical field for building, specifically a kind of building trade material lifting device.
Background technique
With the continuous improvement of people's living standards, building trade is also evolving, and in daily life, is seen everywhere Big and small construction site, but in construction industry work progress, since the universal weight of construction material is big, using building for transmission The method for building worker's manpower transport's construction material, not only inefficiency, and be easy to keep construction worker injured, it is therefore desirable to it is a kind of Practical building trade material lifting device.
Chinese patent (notification number: CN207645704U, the day for announcing: 2018.07.04) has disclosed a kind of construction and decoration dress Decorations material lifting device, including pedestal, stop sleeve, transmission case, lifting slider, rope, screw rod, support beam and hook, Lifting slider is set on the excircle of screw rod by internal thread through hole threaded connection, and lifting is offered on the side plate of stop sleeve Channel, is fixedly installed the elevating lever slided up and down in liftway on lifting slider, on the end excircle of elevating lever External screw thread is offered, the top fixed frame of stop sleeve is equipped with support beam, and support beam rotation is provided with directive wheel, rope Middle part, which is wire-wrapped on directive wheel, to be arranged, and one end of rope is fixedly installed with swivel nut, and swivel nut is connected through a screw thread mode and is set in liter The end of bar drops, and the other end of rope is fixedly installed with support plate, and the bottom symmetrical of support plate is fixedly installed hook.But this In actual use, lifting slider stability in lifting process is very poor, and rate of breakdown is very high, while only adopting for kind device It is driven with bevel-gear sett, when building material quality is larger, user is too laborious.
Summary of the invention
In order to solve the problems mentioned above in the background art, the present invention provides a kind of building trades to be filled with material lifting It sets.
To achieve the above object, the invention provides the following technical scheme:
A kind of building trade material lifting device, including pedestal, transmission case, control cabinet, elevator, link block, wirerope, cunning Wheel, pulley yoke and hook, the pedestal top are provided with the transmission case, are provided with the control cabinet above the transmission case, The control cabinet is internally provided with the elevator, and the elevator right end is welded with the link block, the link block Upper end is welded with the wirerope, and the wirerope is mounted on the pulley and end and the hook connect, described Pulley bolt is fixed on the pulley yoke;The elevator is slidably mounted in sliding slot, and the sliding slot is opened in the control Case inner left wall, screw thread is equipped with shaft at the elevator center, and the shaft upper end is rotatably installed in the control cabinet top Inner wall is held, the shaft lower end is rotatably installed in the transmission case bottom interior wall, is symmetrically set with and leads on the elevator Move up and down the elevator in the control cabinet by the rotation of the shaft to mechanism, the guiding mechanism can Stationarity when elevator lifting is greatly improved, the rate of breakdown of device is effectively reduced;The shaft bottom welding It is fixed with spur gear A, the spur gear A is engaged with spur gear B, is coaxially installed with bevel gear A below the spur gear B, described Bevel gear A is engaged with bevel gear B, and the bevel gear B is weldingly fixed on turntable shaft, by using two pairs of gear drives, significantly The transmission ratio for improving device keeps worker more convenient laborsaving when rotating turntable improving material.
As further scheme of the invention: the guiding mechanism includes guide rod and through-hole, and the guide rod is inserted into described In through-hole, the guide rod top is weldingly fixed on the control cabinet top inner wall, and the guide rod bottom end is weldingly fixed on the control Case bottom interior wall processed, the through-hole are opened on the elevator.
As further scheme of the invention: the guiding mechanism bottom is provided with buffer gear, can be improved good Damping, buffering effect, the elevator caused by hitting during avoiding the elevator from reducing with the control cabinet move Position, deformation, further reduced the rate of breakdown of device;The buffer gear includes top plate, aperture, slide bar, spring A and set Tin, the aperture is offered on the top plate, the guide rod, the top plate lower end surface and the slide bar are fitted in the aperture Top is welded and fixed, and the slide bar lower slide is mounted in the sleeve, and the spring A, institute are also cased with outside the slide bar It states sleeve bottom and is weldingly fixed on the control cabinet bottom interior wall.
As further scheme of the invention: being welded with block, the block at left and right sides of the control cabinet bottom It is slidably mounted in notch, the notch is opened in the transmission case top, is also placed with spring B, Neng Gou great in the notch The cushion performance between the transmission case and the control cabinet is promoted greatly.
As further scheme of the invention: the transmission case basal sliding is mounted in locating slot, and the locating slot is opened Set on the pedestal upper surface, it is also placed with spring C in the locating slot, plays buffering and damping effect.
As further scheme of the invention: the base bottom bolt is fixed with universal wheel and hydraulic support.
Compared with prior art, the beneficial effects of the present invention are:
Material is hung on the hook, then worker is by rotating the turntable shaft improving material, due in the transmission case Using two pairs of gear drives, the transmission ratio of device is substantially increased, makes worker more convenient province when rotating turntable improving material Power;It is symmetrically set with guiding mechanism on the elevator, by the rotation of the shaft, makes the elevator in the control It is moved up and down in case processed, the guiding mechanism can greatly improve stationarity when elevator lifting, effectively reduce dress The rate of breakdown set;The guiding mechanism bottom is provided with buffer gear, can be improved good damping, buffering effect, avoids The elevator elevator displacement, deformation caused by hitting during reducing with the control cabinet, further decrease The rate of breakdown of device.When the present invention is used for the material lifting of building trade, has and use laborsaving, conveniently moving, stabilization The advantages that property is good, rate of breakdown, substantially increases construction efficiency, practicability is extremely strong, while low production cost, is worthy to be popularized It uses.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Fig. 2 is the structural schematic diagram of buffer gear in Fig. 1.
Fig. 3 is the enlarged drawing of part A in Fig. 1.
In figure: 1- pedestal, 2- transmission case, 3- control cabinet, 4- elevator, 5- link block, 6- wirerope, 7- pulley, 8- are sliding Wheel carrier, 9- hook, 10- shaft, 11- guiding mechanism, 12- guide rod, 13- through-hole, 14- sliding slot, 15- buffer gear, 16- top plate, 17- aperture, 18- slide bar, 19- spring A, 20- sleeve, 21- spur gear A, 22- spur gear B, 23- bevel gear A, 24- bevel gear B, 25- turntable shaft, 26- block, 27- notch, 28- spring B, 29- spring C, 30- locating slot, 31- universal wheel, 32- hydraulic pressure support Seat.
Specific embodiment
Embodiment 1
Please refer to Fig. 1 and Fig. 2, a kind of building trade material lifting device, including pedestal 1, transmission case 2, control cabinet 3, lifting Block 4, link block 5, wirerope 6, pulley 7, pulley yoke 8 and hook 9, are provided with the transmission case 2 above the pedestal 1, described The control cabinet 3 is provided with above transmission case 2, the control cabinet 3 is internally provided with the elevator 4,4 right end of elevator It is welded with the link block 5,5 upper end of link block is welded with the wirerope 6, and the wirerope 6 is mounted on On the pulley 7 and end is connect with the hook 9, and 7 bolt of pulley is fixed on the pulley yoke 8;The elevator 4 It is slidably mounted in sliding slot 14, the sliding slot 14 is opened in 3 inner left wall of control cabinet, screw thread at 4 center of elevator Shaft 10 is installed, 10 upper end of shaft is rotatably installed in the 3 top inner wall of control cabinet, 10 lower end of the shaft rotation peace Mounted in 2 bottom interior wall of transmission case, it is symmetrically set with guiding mechanism 11 on the elevator 4, passes through the shaft 10 Rotation, move up and down the elevator 4 in the control cabinet 3, the guiding mechanism 11 can greatly improve the liter Stationarity when block 4 is gone up and down is dropped, the rate of breakdown of device is effectively reduced;The guiding mechanism 11 includes guide rod 12 and through-hole 13, the guide rod 12 is inserted into the through-hole 13, and 12 top of guide rod is weldingly fixed on 3 top inner wall of control cabinet, 12 bottom end of guide rod is weldingly fixed on 3 bottom interior wall of control cabinet, and the through-hole 13 is opened on the elevator 4;Institute It states 11 bottom of guiding mechanism and is provided with buffer gear 15, can be improved good damping, buffering effect, the elevator 4 is avoided to drop The displacement of elevator 4, deformation, further reduced the event of device caused by hitting during low with the control cabinet 3 Hinder incidence;The buffer gear 15 includes top plate 16, aperture 17, slide bar 18, spring A19 and sleeve 20, on the top plate 16 The aperture 17 is offered, the guide rod 12 is fitted in the aperture 17,16 lower end surface of top plate and the slide bar 18 push up End is welded and fixed, and 18 lower slide of slide bar is mounted in the sleeve 20, is also cased with the spring outside the slide bar 18 A19,20 bottom of sleeve are weldingly fixed on 3 bottom interior wall of control cabinet;10 bottom of shaft is welded with straight-tooth A21 is taken turns, the spur gear A21 is engaged with spur gear B22, is coaxially installed with bevel gear A23 below the spur gear B22, described Bevel gear A23 is engaged with bevel gear B24, and the bevel gear B24 is weldingly fixed on turntable shaft 25, is passed by using two pairs of gears It is dynamic, the transmission ratio of device is substantially increased, keeps worker more convenient laborsaving when rotating turntable improving material.
Embodiment 2
Fig. 1 and Fig. 3 are please referred to, is welded with block 26 at left and right sides of 3 bottom of control cabinet, the block 26 is slidably installed In notch 27, the notch 27 is opened in 2 top of transmission case, is also placed with spring B 28, Neng Gou great in the notch 27 The cushion performance between the transmission case 2 and the control cabinet 3 is promoted greatly;2 basal sliding of transmission case is mounted on locating slot 30 Interior, the locating slot 30 is opened in 1 upper surface of pedestal, is also placed with spring C29 in the locating slot 30, plays buffering and subtract Shake effect;1 bottom bolts of pedestal are fixed with universal wheel 31 and hydraulic support 32.
The working principle of the invention is: material being hung on the hook 9, then worker is by rotating the turntable shaft 25 Improving material substantially increases the transmission ratio of device, is turning worker due to using two pairs of gear drives in the transmission case 2 It is more convenient laborsaving when turn disk improving material;It is symmetrically set with guiding mechanism 11 on the elevator 4, passes through described turn The rotation of axis 10 moves up and down the elevator 4 in the control cabinet 3, and the guiding mechanism 11 can greatly improve institute Stationarity when elevator 4 is gone up and down is stated, the rate of breakdown of device is effectively reduced;11 bottom of guiding mechanism is provided with slow Punch mechanism 15 can be improved good damping, buffering effect, send out during avoiding the elevator 4 from reducing with the control cabinet 3 The displacement of elevator 4, deformation, further reduced the rate of breakdown of device caused by raw shock.The present invention is for building When the material lifting of industry, have many advantages, such as using laborsaving, conveniently moving, stability is good, rate of breakdown, substantially increase and apply Work efficiency rate, practicability is extremely strong, while low production cost, is worth of widely use.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims Variation is included within the present invention.Any reference signs in the claims should not be construed as limiting the involved claims.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art The other embodiments being understood that.

Claims (7)

1. a kind of building trade material lifting device, including pedestal (1), transmission case (2), control cabinet (3), elevator (4), company Block (5), wirerope (6), pulley (7), pulley yoke (8) and hook (9) are connect, is provided with the transmission case above the pedestal (1) (2), it is provided with the control cabinet (3) above the transmission case (2), the control cabinet (3) is internally provided with the elevator (4), elevator (4) right end is welded with the link block (5), and link block (5) upper end is welded with described Wirerope (6), the wirerope (6) is mounted on the pulley (7) and end is connect with the hook (9), the pulley (7) Bolt is fixed on the pulley yoke (8), it is characterised in that: the elevator (4) is slidably mounted in sliding slot (14), the cunning Slot (14) is opened in the control cabinet (3) inner left wall, and screw thread is equipped with shaft (10) at elevator (4) center, described Shaft (10) upper end is rotatably installed in the control cabinet (3) top inner wall, and shaft (10) lower end is rotatably installed in the biography Case (2) bottom interior wall is moved, is symmetrically set with guiding mechanism (11) on the elevator (4);Shaft (10) the bottom weldering Connect and be fixed with spur gear A(21), the spur gear A(21) engaged with spur gear B(22), the spur gear B(22) lower section is coaxially Bevel gear A(23 is installed), the bevel gear A(23) engaged with bevel gear B(24), the bevel gear B(24) be weldingly fixed on On turntable shaft (25).
2. a kind of building trade material lifting device according to claim 1, it is characterised in that: the guiding mechanism It (11) include guide rod (12) and through-hole (13), the guide rod (12) is inserted into the through-hole (13), guide rod (12) top It is weldingly fixed on the control cabinet (3) top inner wall, guide rod (12) bottom end is weldingly fixed in the control cabinet (3) bottom Wall, the through-hole (13) are opened on the elevator (4).
3. a kind of building trade material lifting device according to claim 2, it is characterised in that: the guiding mechanism (11) bottom is provided with buffer gear (15).
4. a kind of building trade material lifting device according to claim 3, it is characterised in that: the buffer gear (15) include top plate (16), aperture (17), slide bar (18), spring A(19) and sleeve (20), it opens up on the top plate (16) It states aperture (17), is fitted with the guide rod (12) in the aperture (17), top plate (16) lower end surface and the slide bar (18) Top is welded and fixed, and slide bar (18) lower slide is mounted in the sleeve (20), is also cased with outside the slide bar (18) The spring A(19), sleeve (20) bottom is weldingly fixed on the control cabinet (3) bottom interior wall.
5. a kind of building trade material lifting device according to claim 1, it is characterised in that: the control cabinet (3) It is welded with block (26) at left and right sides of bottom, the block (26) is slidably mounted in notch (27), the notch (27) It is opened in the transmission case (2) top, is also placed with spring B (28) in the notch (27).
6. a kind of building trade material lifting device according to claim 1, it is characterised in that: the transmission case (2) Basal sliding is mounted in locating slot (30), and the locating slot (30) is opened in the pedestal (1) upper surface, the locating slot (30) spring C(29 is also placed in).
7. a kind of building trade material lifting device according to claim 1-6, it is characterised in that: the bottom Seat (1) bottom bolts are fixed with universal wheel (31) and hydraulic support (32).
CN201910147653.5A 2019-02-27 2019-02-27 Material lifting device for building industry Pending CN109987529A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910147653.5A CN109987529A (en) 2019-02-27 2019-02-27 Material lifting device for building industry

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910147653.5A CN109987529A (en) 2019-02-27 2019-02-27 Material lifting device for building industry

Publications (1)

Publication Number Publication Date
CN109987529A true CN109987529A (en) 2019-07-09

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910147653.5A Pending CN109987529A (en) 2019-02-27 2019-02-27 Material lifting device for building industry

Country Status (1)

Country Link
CN (1) CN109987529A (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2335452C2 (en) * 2006-11-09 2008-10-10 Волжско-Камский научно-исследовательский институт лесного комплекса (ВКНИИЛК) Crane for loads lifting into window aperture, on recessed balconies and balconies of buildings being under construction or repair
CN204625033U (en) * 2015-05-20 2015-09-09 重庆睿安特盾构技术有限公司 A kind of shield machine cutter hoisting structure
CN207566760U (en) * 2017-11-16 2018-07-03 倪德斌 A kind of water pipeline boom hoisting
CN207932940U (en) * 2018-03-13 2018-10-02 黄河科技学院 A kind of building fabricated construction transport fixing device
CN108726391A (en) * 2018-08-15 2018-11-02 李炫颖 A kind of hanging apparatus and hanging method of hydraulic engineering equipment
CN108840268A (en) * 2018-07-26 2018-11-20 赣州市兴顺辉科技有限公司 A kind of road and bridge construction material lifting device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2335452C2 (en) * 2006-11-09 2008-10-10 Волжско-Камский научно-исследовательский институт лесного комплекса (ВКНИИЛК) Crane for loads lifting into window aperture, on recessed balconies and balconies of buildings being under construction or repair
CN204625033U (en) * 2015-05-20 2015-09-09 重庆睿安特盾构技术有限公司 A kind of shield machine cutter hoisting structure
CN207566760U (en) * 2017-11-16 2018-07-03 倪德斌 A kind of water pipeline boom hoisting
CN207932940U (en) * 2018-03-13 2018-10-02 黄河科技学院 A kind of building fabricated construction transport fixing device
CN108840268A (en) * 2018-07-26 2018-11-20 赣州市兴顺辉科技有限公司 A kind of road and bridge construction material lifting device
CN108726391A (en) * 2018-08-15 2018-11-02 李炫颖 A kind of hanging apparatus and hanging method of hydraulic engineering equipment

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Application publication date: 20190709