CN113911942B - Detachable combined micro-crane for seedling field - Google Patents
Detachable combined micro-crane for seedling field Download PDFInfo
- Publication number
- CN113911942B CN113911942B CN202111271509.6A CN202111271509A CN113911942B CN 113911942 B CN113911942 B CN 113911942B CN 202111271509 A CN202111271509 A CN 202111271509A CN 113911942 B CN113911942 B CN 113911942B
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- Prior art keywords
- block
- supporting
- bar
- vertical pipe
- motor
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C25/00—Cranes not provided for in groups B66C17/00 - B66C23/00
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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
- B66C11/00—Trolleys or crabs, e.g. operating above runways
- B66C11/02—Trolleys or crabs, e.g. operating above runways with operating gear or operator's cabin suspended, or laterally offset, from runway or track
- B66C11/04—Underhung trolleys
- B66C11/06—Underhung trolleys running on monorails
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C15/00—Safety gear
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C9/00—Travelling gear incorporated in or fitted to trolleys or cranes
- B66C9/14—Trolley or crane travel drives
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cultivation Receptacles Or Flower-Pots, Or Pots For Seedlings (AREA)
Abstract
The invention discloses a detachable combined micro-crane for a seedling farm, which comprises a supporting part and a lifting part, wherein the supporting part comprises a vertical pipe, an inner block and a supporting bar, wherein the inner block and the supporting bar are arranged in the supporting part, a fixed cylinder is arranged outside the vertical pipe, one end of each supporting bar is hinged with the inner block, a cylinder bolt is arranged inside the supporting bar, the fixed cylinder and the inner block are connected with the vertical pipe through a locating pin, the lifting part comprises a cross beam inserted above the vertical pipe, a motor is arranged in the vertical part of the cross beam, a threaded rod is arranged in the horizontal part of the cross beam, the motor is upwards jacked by a spring and a supporting block, an output shaft of the motor is in transmission connection with the threaded rod through a bevel gear, a winch is arranged below the horizontal part of the cross beam, the winch is in threaded connection with the threaded rod, the upper side and the lower end of the vertical pipe are both radially perforated, and the outer circle of the fixed cylinder is radially perforated. This a can dismantle combination formula little loop wheel machine for seedling field accomodates and conveniently expands easily, is fit for generally using widely.
Description
Technical Field
The invention belongs to the technical field of seedling field equipment, and particularly relates to a detachable combined micro-crane for a seedling field.
Background
The micro-crane is small mechanical equipment with excellent performance and wide application range, is suitable for lifting workpieces in building materials and machine workshops, and is also applied to production assembly lines, warehouses, household lifting articles and the like in household power plants and food factories;
however, most of the existing small cranes have complex structures, large occupied area, inconvenient installation, poor stability and small bearing capacity, are not suitable for being used for lifting cargoes on trucks, occupy a large amount of space when being stored, are more typically cranes with cable stayed bars as reinforcing structures, and obliquely arranged cranes occupy the space inside the carriage, so that the problem of reduction of available space inside the carriage is solved.
Disclosure of Invention
The invention aims to provide a detachable combined micro-crane for a seedling farm, which is used for solving the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions: the detachable combined type micro-crane for the seedling field comprises a supporting part and a lifting part, wherein the supporting part comprises a vertical pipe, an inner block and a supporting bar, the inner block and the supporting bar are arranged in the vertical pipe, a fixed cylinder is arranged outside the vertical pipe, one end of the supporting bar is hinged with the inner block, a cylinder bolt is arranged inside the supporting bar, and the fixed cylinder and the inner block are connected with the vertical pipe through a positioning pin;
the lifting part comprises a cross beam inserted above the vertical pipe, a motor is arranged in the vertical part of the cross beam, a threaded rod is arranged in the horizontal part of the cross beam, the motor is upwards jacked by a spring and a supporting block, an output shaft of the motor is in transmission connection with the threaded rod through a bevel gear, a winch is arranged below the horizontal part of the cross beam, and the winch is in threaded connection with the threaded rod.
Preferably, the upper side and the lower end of the vertical pipe are radially perforated, the outer circle of the fixed cylinder is radially perforated, three cylinder strips distributed in annular arrays are arranged on the outer circle of the fixed cylinder, the cylinder bolts are located in through holes at the ends of the cylinder strips, and the locating pins are located in the through holes on the outer circles of the fixed cylinder and the vertical pipe.
Preferably, the outer circle of the upper side of the inner block is provided with an upper block hole, the middle part of the positioning pin is positioned in the upper block hole, the lower end of the inner block is provided with three block grooves distributed in a wake-up array, and the side wall of each block groove is provided with a lower block hole.
Preferably, the end of the supporting bar is provided with a bar hinge block, the upper end of the supporting bar is provided with a top contact surface, the inside of the supporting bar is provided with a threaded hole, the bar hinge block is positioned in the block groove, the bar hinge block is internally provided with a bar pin, and the two ends of the bar pin are positioned in the block lower hole.
Preferably, the cross beam comprises a tubular connecting part, an insertion pipe and a horizontal beam, wherein the insertion pipe is a vertical part of the cross beam, the horizontal beam is a horizontal part of the cross beam, and the tubular connecting part is a transition part where the insertion pipe and the horizontal beam are connected.
Preferably, the excircle of tubular connection portion is opened has holds in the palm a hole and mounting hole, the square cavity of tubular connection portion inside for the rectangle, open the horizontal beam bottom has the roof beam groove, the one end that tubular connection portion was kept away from to the horizontal beam holds in the palm two holes, the both ends of threaded rod are located and hold in the palm a hole and mounting hole inside, bevel gear is equipped with two and all is located the square cavity inside, two bevel gears intermeshing, and one of them bevel gear cover is established and is fixed at the tip of threaded rod, and another bevel gear cover is established and is fixed on the output shaft of motor.
Preferably, the inner space of the insertion tube is a tube cavity, the upper end of the tube cavity is an annular inner ridge, the inner wall of the lower end of the insertion tube is provided with threads, and the inner wall of the tube cavity is provided with rotation stopping grooves distributed in an annular array.
Preferably, the motor is positioned in the lumen, the outer circle of the motor is provided with a convex edge positioned in the rotation stopping groove, the supporting block is positioned in the threaded part of the insertion tube, and a motor with a top spring is arranged above the supporting block.
Preferably, a vertical bar penetrating through the beam groove is arranged above the winch, a horizontal wheel shaft is arranged above the vertical bar, and pulleys in rotary connection are arranged at two ends of the wheel shaft.
Preferably, the pulley is pressed against the upper edge of the horizontal beam.
The invention has the technical effects and advantages that: the detachable combined type micro-crane for the seedling field has the advantages that the supporting part and the lifting part are completely separated, the supporting part can be completely contained into a rod shape in the transportation process, the lifting part is detached and has a profile similar to a roller shape, and the two rod-shaped supporting parts and the lifting part can be horizontally placed and transported in the transportation process, so that the problem of overlarge occupied space in the transportation process is solved, and the occupied space in the transportation process is saved;
the supporting part comprises a vertical pipe, an inner block and a supporting bar, wherein the inner block and the supporting bar are arranged in the vertical pipe, a fixed barrel is arranged outside the vertical pipe, one end of the supporting bar is hinged with the inner block, a barrel bolt is arranged in the supporting bar, the fixed barrel and the inner block are connected with the vertical pipe through a positioning pin, the supporting bar and the inner block are matched with each other, the inner space of the vertical pipe can be utilized to the greatest extent, the space utilization rate in the vertical pipe is maximized, the structural strength of the supporting bar is improved to the greatest extent in a limited range, and as the columnar structure formed by combining three supporting bars corresponds to the space outline in the vertical pipe, the shaking damage to the inner wall of the vertical pipe due to impact in the transportation process is avoided, and the structural reliability in storage and transportation is improved;
the hoisting part comprises a cross beam inserted above the vertical pipe, a motor is arranged in the vertical part of the cross beam, a threaded rod is arranged in the horizontal part of the cross beam, the motor is upwards jacked by a spring and a supporting block, an output shaft of the motor is in transmission connection with the threaded rod through a bevel gear, a winch is arranged below the horizontal part of the cross beam, the winch is in threaded connection with the threaded rod, the weight of the winch is pressed above the horizontal beam through a pulley, damage caused by radial stress of the threaded rod is avoided, and the structure has good load carrying capacity;
the spring promotes the motor to remove, lets two bevel gears intermeshing, and this structure is a protection architecture, and when the threaded rod rotatory card, motor drive bevel gear rotation can let its axial direction atress, and this power will compress the spring, lets two bevel gears remove the meshing and avoid the motor to burn to realize the effect of protection motor.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of a support portion structure of the present invention;
FIG. 3 is a schematic view showing a structure of a support portion of the present invention in a separated state;
FIG. 4 is a schematic view of the bottom structure of the support section of the present invention in its expanded state;
FIG. 5 is a schematic view of a stator structure of the present invention;
FIG. 6 is a schematic view of the inner block structure of the present invention;
FIG. 7 is a schematic view of a support bar according to the present invention;
FIG. 8 is a schematic view of the structure of a lifting part of the present invention;
FIG. 9 is a schematic view of a structure of a lifting part in a separated state according to the present invention;
FIG. 10 is a schematic view of a beam structure of the present invention;
fig. 11 is a schematic view of a hoist according to the present invention.
In the figure: 1. a vertical pipe; 2. a barrel bolt; 3. setting a barrel; 301. a barrel strip; 4. a positioning pin; 5. an inner block; 501. a hole in the block; 502. a block groove; 503. a block lower hole; 6. a bar pin; 7. a support bar; 701. a bar hinge block; 702. a top contact surface; 8. a cross beam; 801. a tubular connection portion; 8011. a square cavity; 8012. a support hole; 8013. a mounting hole; 802. an insertion tube; 8021. inner ridge; 8022. a lumen; 8023. a rotation stopping groove; 803. a horizontal beam; 8031. a beam groove; 8032. a second hole; 9. a threaded rod; 10. bevel gears; 11. a motor; 12. a spring; 13. a support block; 14. a hoist; 1401. a vertical bar; 1402. a wheel axle; 1403. and (3) a pulley.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
Referring to fig. 1 to 11, a detachable combined micro-crane for a seedling field comprises a supporting part and a lifting part, wherein the supporting part comprises a vertical pipe 1, an inner block 5 and a supporting bar 7, wherein the inner block 5 and the supporting bar 7 are arranged in the supporting part, a fixed cylinder 3 is arranged outside the vertical pipe 1, one end of the supporting bar 7 is hinged with the inner block 5, a cylinder bolt 2 is arranged inside the supporting bar 7, the fixed cylinder 3 and the inner block 5 are connected with the vertical pipe 1 through a locating pin 4, the lifting part comprises a cross beam 8 inserted above the vertical pipe 1, a motor 11 is arranged in the vertical part of the cross beam 8, a threaded rod 9 is arranged in the horizontal part of the cross beam 8, the motor 11 is upwards jacked by a spring 12 and a supporting block 13, an output shaft of the motor 11 is in transmission connection with the threaded rod 9 through a bevel gear 10, a winch 14 is arranged below the horizontal part of the cross beam 8, the winch 14 is in threaded connection with the threaded rod 9, the supporting part is in rotary connection with the lifting part, and the lifting part is inserted into the supporting part.
Referring to fig. 2-7, the upper side and the lower end of the vertical tube 1 are radially perforated, the outer circle of the fixed cylinder 3 is radially perforated, three circular array distributed cylinder strips 301 are arranged on the outer circle of the fixed cylinder 3, the cylinder bolts 2 are positioned in through holes at the end parts of the cylinder strips 301, the cylinder strips 301 are matched with the positions of the cylinder bolts 2 for locking the support strips 7, the positioning pins 4 are positioned in the through holes on the outer circles of the fixed cylinder 3 and the vertical tube 1, the positioning pins 4 are positioned in the vertical tube 1, the two positions respectively correspond to the unfolding and storage states of the support strips 7, the upper side outer circle of the inner block 5 is provided with an upper block hole 501, the middle part of the positioning pin 4 is positioned in the upper block hole 501, the lower end of the inner block 5 is provided with three wakeup array distributed block grooves 502, the side wall of the block groove 502 is provided with a lower block hole 503, the end parts of the support strips 7 are provided with strip hinge blocks 701, the upper ends of the support strips 7 are provided with top contact surfaces 702, the top contact surfaces 702 are contacted with the positions of the top surfaces of the support strips 7 on the block grooves 502, the threaded holes are internally provided with threaded holes for accommodating the cylinder bolts 2, the strip hinge blocks 701 are positioned in the block hinge blocks 701, the inside the block hinge blocks are positioned in the block grooves 6 are positioned in the block hinge blocks, the block sides are positioned in the block hinge blocks are 6, and the inside the hinge blocks are positioned in the block 6, and the hinge pins 6 are positioned in the hinge blocks 6.
Referring to fig. 8 to 10, the cross beam 8 includes a tubular connection portion 801, an insertion tube 802 and a horizontal beam 803, the insertion tube 802 is a vertical portion of the cross beam 8, the horizontal beam 803 is a horizontal portion of the cross beam 8, the tubular connection portion 801 is a transition portion where the insertion tube 802 and the horizontal beam 803 are connected, a hole 8012 and a mounting hole 8013 are formed in an outer circle of the tubular connection portion 801, a rectangular square cavity 8011 is formed in the tubular connection portion 801, a contour of the square cavity 8011 is adapted to a bevel gear 10, a beam groove 8031 is formed in a bottom of the horizontal beam 803, one end of the horizontal beam 803, which is far away from the tubular connection portion 801, holds two holes 8032, two ends of a threaded rod 9 are located in the hole 8012 and the mounting hole 8013, the cross beam 8 is of an integral structure formed by welding, the tubular connection portion 801 and the insertion tube 802 are of an integral structure formed by turning, and the horizontal beam 803 is connected by welding;
the bevel gear 10 is equipped with two and all is located inside the square cavity 8011, two bevel gears 10 intermeshing, one bevel gear 10 cover is established and is fixed on the tip of threaded rod 9, another bevel gear 10 cover is established and is fixed on the output shaft of motor 11, insert tube 802 inner space is cavity 8022, cavity 8022 upper end is annular interior stupefied 8021, the inner wall of insert tube 802 lower extreme is opened the screw thread, the inner wall of cavity 8022 is opened and is had the spiral groove 8023 that the annular array distributes, motor 11 is located inside the cavity 8022, the excircle of motor 11 is equipped with the bead that is located in spiral groove 8023, support block 13 is located the screw thread portion of insert tube 802, support block 13 top is equipped with the motor 11 of top spring 12, spring 12 is used for buffering motor 11's axial atress, play the effect of protecting motor 11.
Referring to fig. 10 to 11, a vertical bar 1401 penetrating through a beam groove 8031 is arranged above the hoist 14, a horizontal wheel axle 1402 is arranged above the vertical bar 1401, two ends of the wheel axle 1402 are provided with pulleys 1403 in rotary connection, the pulleys 1403 are pressed against the upper edge of the horizontal beam 803, and the threaded rod 9 replaces radial stress by the pulleys 1403.
The working principle of the detachable combined type micro-crane for the seedling field is that when a supporting part is unfolded, a locating pin 4 is firstly pulled out, then an inner block 5 and a supporting bar 7 hinged with the inner block are pulled out from the lower part of a vertical pipe 1, three supporting bars 7 are pulled to be in a horizontal state after the inner block is allowed to slide down a fixed cylinder 3, then the locating pin 4 is inserted back, then the relative positions of the fixed cylinder 3 and the supporting bar 7 are locked through a cylinder bolt 2, then the locating pin 4 is inserted back again, and the relative positions of the vertical pipe 1, the fixed cylinder 3 and the inner block 5 are further locked through the locating pin 4, so that the unfolding of the supporting part is completed;
when the lifting part is combined with the supporting part, the inserting pipe 802 is inserted into the upper end of the vertical pipe 1, so that the combination of the lifting part and the supporting part can be completed;
during lifting, the lifting of the seedlings is completed through the winch 14, the pulley 1403 is pressed above the horizontal beam 803 during lifting, the threaded rod 9 is prevented from bearing excessive radial force, the motor 11 drives the two bevel gears 10 to drive the threaded rod 9 to rotate, the winch 14 is driven to move when the threaded rod 9 rotates, when the threaded rod 9 is clamped during rotation, the motor 11 is pressed downwards due to the meshing component force of the two bevel gears 10, the motor 11 compresses the spring 12, and the phenomenon that a main shaft of the motor 11 is clamped to cause coil burnout is avoided.
The foregoing is only a preferred embodiment of the invention, but the scope of the invention is not limited thereto, and any person skilled in the art who is in the field of the invention can apply equivalent substitution or modification to the technical solution and the inventive concept according to the invention within the scope of the invention.
Claims (6)
1. A can dismantle combination formula little loop wheel machine for seedling field, includes supporting part and lifts by crane part, its characterized in that: the support part comprises a vertical pipe (1), an inner block (5) and a support bar (7) which are arranged in the vertical pipe, wherein a fixed cylinder (3) is arranged outside the vertical pipe (1), one end of the support bar (7) is hinged with the inner block (5), a cylinder bolt (2) is arranged in the support bar (7), the fixed cylinder (3) and the inner block (5) are connected with the vertical pipe (1) through a locating pin (4), and the locating pin (4) is provided with two existing positions in the vertical pipe (1) which correspond to the unfolding and storage states of the support bar (7) respectively;
the lifting part comprises a cross beam (8) inserted above the vertical pipe (1), a motor (11) is arranged in the vertical part of the cross beam (8), a threaded rod (9) is arranged in the horizontal part of the cross beam (8), the motor (11) is upwards jacked by a spring (12) and a supporting block (13), an output shaft of the motor (11) is in transmission connection with the threaded rod (9) through a bevel gear (10), a winch (14) is arranged below the horizontal part of the cross beam (8), and the winch (14) is in threaded connection with the threaded rod (9);
the upper side and the lower end of the vertical pipe (1) are radially perforated, the outer circle of the fixed cylinder (3) is radially perforated, three cylinder strips (301) distributed in an annular array are arranged on the outer circle of the fixed cylinder (3), the cylinder bolts (2) are positioned in through holes at the end parts of the cylinder strips (301), and the positioning pins (4) are positioned in the through holes on the outer circles of the fixed cylinder (3) and the vertical pipe (1);
the upper outer circle of the inner block (5) is provided with a block upper hole (501), the middle part of the positioning pin (4) is positioned in the block upper hole (501), the lower end of the inner block (5) is provided with three block grooves (502) distributed in a wake-up array, and the side wall of the block groove (502) is provided with a block lower hole (503);
the end part of the supporting bar (7) is provided with a bar hinge block (701), the upper end of the supporting bar (7) is provided with a top contact surface (702), a threaded hole is formed in the supporting bar (7), the bar hinge block (701) is positioned in the block groove (502), the bar hinge block (701) is internally provided with a bar pin (6), and two ends of the bar pin (6) are positioned in the block lower hole (503);
the cross beam (8) comprises a tubular connecting part (801), an insertion pipe (802) and a horizontal beam (803), wherein the insertion pipe (802) is a vertical part of the cross beam (8), the horizontal beam (803) is a horizontal part of the cross beam (8), and the tubular connecting part (801) is a transition part where the insertion pipe (802) and the horizontal beam (803) are connected;
when the support part is unfolded, firstly, the positioning pin (4) is pulled out, then the inner block (5) and the supporting bar (7) hinged with the inner block are pulled out from the lower part of the vertical tube (1), then, the three supporting bars (7) are pulled to be in a horizontal state, the fixed tube (3) is slid down, then, the positioning pin (4) is inserted back, then, the relative positions of the fixed tube (3) and the supporting bar (7) are locked through the tube bolt (2), then, the positioning pin (4) is inserted back again, and the relative positions of the vertical tube (1), the fixed tube (3) and the inner block (5) are further locked through the positioning pin (4), so that the unfolding of the support part is completed;
when the lifting part is combined with the supporting part, the inserting pipe (802) is inserted into the upper end of the vertical pipe (1), and then the combination of the lifting part and the supporting part can be completed.
2. A detachable combined micro-crane for a nursery as claimed in claim 1, wherein: the cylindrical connecting part (801) is provided with a hole (8012) and a mounting hole (8013) on the outer circle, the cylindrical connecting part (801) is internally provided with a rectangular square cavity (8011), the bottom of the horizontal beam (803) is provided with a beam groove (8031), one end of the horizontal beam (803) far away from the cylindrical connecting part (801) is provided with two holes (8032), two ends of the threaded rod (9) are positioned inside the hole (8012) and the mounting hole (8013), the bevel gears (10) are provided with two bevel gears and are positioned inside the square cavity (8011), the two bevel gears (10) are meshed with each other, one bevel gear (10) is sleeved and fixed at the end part of the threaded rod (9), and the other bevel gear (10) is sleeved and fixed on the output shaft of the motor (11).
3. A detachable combined micro-crane for a nursery as claimed in claim 2, wherein: the inner space of the insertion tube (802) is a tube cavity (8022), the upper end of the tube cavity (8022) is an annular inner ridge (8021), the inner wall of the lower end of the insertion tube (802) is provided with threads, and the inner wall of the tube cavity (8022) is provided with annular array distributed spin-stopping grooves (8023).
4. A detachable combined micro-crane for a nursery as claimed in claim 3, wherein: the motor (11) is located inside the tube cavity (8022), ribs located in the rotation stopping grooves (8023) are formed in the outer circle of the motor (11), the supporting blocks (13) are located in threaded portions of the insertion tubes (802), and the motor (11) with the top springs (12) is arranged above the supporting blocks (13).
5. The detachable combined type micro-crane for a seedling farm according to claim 4, wherein: a vertical bar (1401) penetrating through the beam groove (8031) is arranged above the winch (14), a horizontal wheel shaft (1402) is arranged above the vertical bar (1401), and pulleys (1403) in rotary connection are arranged at two ends of the wheel shaft (1402).
6. The detachable combined type micro-crane for a seedling farm according to claim 5, wherein: the pulley (1403) presses against the upper edge of the horizontal beam (803).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111271509.6A CN113911942B (en) | 2021-10-29 | 2021-10-29 | Detachable combined micro-crane for seedling field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111271509.6A CN113911942B (en) | 2021-10-29 | 2021-10-29 | Detachable combined micro-crane for seedling field |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113911942A CN113911942A (en) | 2022-01-11 |
| CN113911942B true CN113911942B (en) | 2023-12-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111271509.6A Active CN113911942B (en) | 2021-10-29 | 2021-10-29 | Detachable combined micro-crane for seedling field |
Country Status (1)
| Country | Link |
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| CN (1) | CN113911942B (en) |
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| CN213171212U (en) * | 2020-05-08 | 2021-05-11 | 莫杰勇 | A hoisting apparatus for building engineering |
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2021
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE20316006U1 (en) * | 2003-10-14 | 2004-01-08 | Putzmeister Ag | Mobile working device has protective sleeve detachably fastened on outer tube which houses telescopic leg and by one section protrudes over free end of outer tube and in retracted state of telescopic leg fits over foot joint |
| EP1700815A1 (en) * | 2005-03-08 | 2006-09-13 | Böhl, Harald | Lifting device |
| US7726497B1 (en) * | 2009-03-02 | 2010-06-01 | The United States Of America As Represented By The Secretary Of The Navy | Removable externally mounted slewing crane for shipping containers |
| KR20180033825A (en) * | 2016-09-26 | 2018-04-04 | 금강공업 주식회사 | Scaffolding structure for architecture |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN113911942A (en) | 2022-01-11 |
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