CN110843637A - Cargo vehicle capable of lifting to flat ground - Google Patents
Cargo vehicle capable of lifting to flat ground Download PDFInfo
- Publication number
- CN110843637A CN110843637A CN201911331287.5A CN201911331287A CN110843637A CN 110843637 A CN110843637 A CN 110843637A CN 201911331287 A CN201911331287 A CN 201911331287A CN 110843637 A CN110843637 A CN 110843637A
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- CN
- China
- Prior art keywords
- cab
- bearing frame
- carriage
- lifting mechanism
- cargo vehicle
- 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
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- 230000007246 mechanism Effects 0.000 claims abstract description 39
- 238000013016 damping Methods 0.000 claims abstract description 24
- 239000000725 suspension Substances 0.000 claims abstract description 15
- 230000003028 elevating effect Effects 0.000 claims description 9
- 230000035939 shock Effects 0.000 claims description 4
- 230000001174 ascending effect Effects 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 2
- 230000002146 bilateral effect Effects 0.000 claims 1
- 101100494448 Caenorhabditis elegans cab-1 gene Proteins 0.000 description 15
- 238000000034 method Methods 0.000 description 6
- 230000009471 action Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60P—VEHICLES ADAPTED FOR LOAD TRANSPORTATION OR TO TRANSPORT, TO CARRY, OR TO COMPRISE SPECIAL LOADS OR OBJECTS
- B60P1/00—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading
- B60P1/02—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading with parallel up-and-down movement of load supporting or containing element
- B60P1/025—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading with parallel up-and-down movement of load supporting or containing element with a loading platform inside the wheels of a same axle and being lowerable below the axle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
- B60S9/00—Ground-engaging vehicle fittings for supporting, lifting, or manoeuvring the vehicle, wholly or in part, e.g. built-in jacks
- B60S9/02—Ground-engaging vehicle fittings for supporting, lifting, or manoeuvring the vehicle, wholly or in part, e.g. built-in jacks for only lifting or supporting
- B60S9/10—Ground-engaging vehicle fittings for supporting, lifting, or manoeuvring the vehicle, wholly or in part, e.g. built-in jacks for only lifting or supporting by fluid pressure
- B60S9/12—Ground-engaging vehicle fittings for supporting, lifting, or manoeuvring the vehicle, wholly or in part, e.g. built-in jacks for only lifting or supporting by fluid pressure of telescopic type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
- B60S9/00—Ground-engaging vehicle fittings for supporting, lifting, or manoeuvring the vehicle, wholly or in part, e.g. built-in jacks
- B60S9/22—Means for attaching lifting, supporting, or manoeuvring devices to vehicles
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Body Structure For Vehicles (AREA)
Abstract
The invention discloses a cargo vehicle capable of lifting to the flat ground, which relates to the technical field of vehicle containers, a front lifting mechanism is arranged at the bottom of a cab, a rear lifting mechanism is arranged at the bottom of the vehicle carriage, the front lifting mechanism comprises a suspension beam fixedly connected with a girder, two groups of damping plates are welded above the suspension beam, two first driving pieces are connected on each group of damping plates, the rear lifting mechanism comprises a bearing frame with a hollow structure, a damping spring is fixedly connected at the top of one end of the bearing frame, which is far away from the cab, and a second driving piece is fixedly arranged above the damping spring, the bright spot of the patent can simultaneously lower the carriage and a vehicle head to the ground through the lifting mechanism, the loading is simple, a trolley can directly enter a box body, when the cargo is loaded, the lifting mechanism is lifted to a certain position through operation control, the vehicle can be started to drive, the commodity circulation major possession of being convenient for like this goes up and down the goods and uses, also lets work efficiency accelerate simultaneously, and is safer.
Description
Technical Field
The invention relates to the technical field of automobile containers, in particular to a cargo carrying automobile capable of being lifted to a flat ground.
Background
Nowadays, global science and technology and economic development rely on the transportation logistics industry of the current high-speed development, the transportation of logistics can not be opened, because the ordinary trucks used for transporting goods are mostly additionally provided with an upper tail plate and a lower tail plate at the tail part of the goods when the goods are loaded and unloaded, even the goods are manually operated, so that human and material resources of people can be greatly consumed, even a great number of potential safety hazards exist, and casualty accidents occurring in the middle of the goods can be seen everywhere.
Therefore, the cargo vehicle capable of ascending and descending to the flat ground is provided by the technical personnel in the field, the head part of the cargo vehicle is ascended and descended through the expansion of four driving parts, and the carriage part is synchronously ascended and descended through two driving parts by utilizing the principle of a fulcrum lever.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a truck capable of lifting to the flat ground, which solves the problems that in the logistics industry, when a common truck for transporting goods loads and unloads the goods, the upper tail plate and the lower tail plate are additionally arranged at the tail part of the goods, even the operation is carried out manually, so that human and material resources of people are greatly consumed, even a great number of potential safety hazards exist, and casualty accidents occurring in the process are visible everywhere.
In order to achieve the purpose, the invention is realized by the following technical scheme: a cargo vehicle capable of lifting to the ground comprises a cab and a carriage, wherein a girder forms a tandem structure, a front lifting mechanism matched with the cab is fixedly installed at the bottom of the cab, and two groups of rear lifting mechanisms are symmetrically installed on two sides of the bottom of the carriage.
Preferably, preceding elevating system is including the fixed suspension roof beam that is connected with the girder, the equal fixed mounting in both ends of suspension roof beam has the front wheel, the top of suspension roof beam and the inboard position department that is located two front wheels all correspond the welding and are provided with two sets of shock attenuation boards, every group the top both ends of shock attenuation board correspond the drive end of two fixedly connected with driving pieces.
Preferably, rear lifting mechanism is including the inside bearing frame who is hollow structure bearing frame hollow structure's inside fixed mounting has the rear wheel, bearing frame installs the roller through a round pin axle towards the one end inside of driver's cabin, bearing frame deviates from the one end top fixedly connected with damping spring of driver's cabin, the fixed second driving piece that is provided with in damping spring top, the flexible end of second driving piece runs through damping spring's inside to finally be connected through articulated mode between and the bearing frame.
Preferably, the cab comprises a cab shell fixedly mounted on a beam of the automobile, the bottom of the cab shell is provided with a front lifting groove matched with the size, and two sides of the bottom of the cab shell are provided with front wheel position-expanding grooves matched with the front wheels.
Preferably, the cab further comprises four front lifting mechanism mounting holes fixedly formed in the bottom end of the interior of the cab shell, the non-telescopic section of the first driving piece is fixedly arranged in the front lifting mechanism mounting holes, and the positions of the four front lifting mechanism mounting holes correspond to the positions of the four first driving pieces.
Preferably, the carriage comprises a carriage shell fixedly mounted on the automobile beam, two groups of rear lifting grooves are symmetrically formed in the rear area of the end face of the bottom of the carriage shell, and each group of rear lifting mechanisms is correspondingly mounted inside the two groups of rear lifting grooves.
Preferably, two rear wheel rubbing grooves are symmetrically formed in the rear section of the bottom of the carriage shell, and the positions of the rear wheel rubbing grooves correspond to the positions of the rear wheels.
Preferably, the carriage further comprises two rear lifting mechanism mounting holes correspondingly formed in the top ends of the rear sides in the two groups of rear lifting grooves, and the non-telescopic end of each second driving piece is fixedly arranged in the rear lifting mechanism mounting holes.
Preferably, the bearing frame is fixedly provided with a spring fixing groove matched with the size of the damping spring at the end, away from the cab, of the bearing frame.
Advantageous effects
The invention provides a truck capable of lifting to the flat ground. Compared with the prior art, the method has the following beneficial effects:
the cargo vehicle capable of ascending and descending to the flat ground is characterized in that a front lifting mechanism is installed at the bottom of a cab, a rear lifting mechanism is installed at the bottom of a carriage of the vehicle, the front lifting mechanism comprises a suspension beam fixedly connected with a girder, front wheels are fixedly installed at two ends of the suspension beam, two groups of damping plates are correspondingly welded above the suspension beam and positioned at the inner sides of the two front wheels, two ends of the top of each group of damping plates are correspondingly and fixedly connected with driving ends of two first driving pieces, the rear lifting mechanism comprises a bearing frame with a hollow structure inside, rear wheels are fixedly installed inside the hollow structure of the bearing frame, a roller is installed inside one end, facing the cab, of the bearing frame through a pin shaft, a damping spring is fixedly connected to the top of one end, facing away from the cab, of the bearing frame, a second driving piece is fixedly arranged above the damping spring, and the telescopic end of the second driving piece penetrates through the, the truck head part of the truck is lifted through the stretching of the four driving pieces, the carriage part is lifted through the two driving pieces by utilizing the principle of fulcrum levers, the synchronous lifting of the carriage part and the carriage head part is realized, the carriage part can be lowered to the bottom surface of the carriage to be contacted with the ground to the maximum extent, the carriage and the truck head can be simultaneously lowered to the ground through the lifting mechanism when goods are loaded, the loading is simple, the truck can directly enter the box body by using a trolley, and the truck can be started to be driven by lifting the lifting mechanism to a certain position through operation control when the goods are loaded, so that the large goods can be loaded and unloaded conveniently, the working efficiency is accelerated, and the truck is safer.
Drawings
FIG. 1 is a schematic view of the respective structures of the present invention;
FIG. 2 is a schematic view of the assembly structure of the present invention;
FIG. 3 is a bottom view of the composite structure of the present invention;
FIG. 4 is a schematic view of the structure of the bottom of the cab of the present invention;
FIG. 5 is a schematic view of the bottom of the vehicle compartment of the present invention;
FIG. 6 is a schematic structural view of a front lift mechanism according to the present invention;
FIG. 7 is a schematic structural view of a rear lift mechanism of the present invention;
fig. 8 is a schematic structural diagram of the load-bearing frame of the present invention.
In the figure: 1. a cab; 11. a cab housing; 12. a front wheel position expanding groove; 13. a front lifting groove; 14. a front lifting mechanism mounting hole; 2. a carriage; 21. a cabin shell; 22. a rear lifting groove; 23. a rear wheel position rubbing groove; 24. a rear lifting mechanism mounting hole; 3. a front lifting mechanism; 31. a suspension beam; 32. a front wheel; 33. a damper plate; 34. a first driving member; 4. a rear lifting mechanism; 41. a load-bearing frame; 42. a rear wheel; 43. a roller; 44. a pin shaft; 45. a spring fixing groove; 46. a damping spring; 47. a second driving member.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-3, the present invention provides a technical solution: a cargo vehicle capable of lifting to the flat ground comprises a cab 1 and a carriage 2 which form a tandem structure through a girder, wherein a front lifting mechanism 3 matched with the cab 1 is fixedly arranged at the bottom of the cab 1, and two groups of rear lifting mechanisms 4 are symmetrically arranged at two sides of the bottom of the carriage 2.
Referring to fig. 6, the front lifting mechanism 3 includes a suspension beam 31 fixedly connected to the girder, front wheels 32 are fixedly mounted at both ends of the suspension beam 31, two sets of damping plates 33 are correspondingly welded at positions above the suspension beam 31 and inside the two front wheels 32, and two ends of the top of each set of damping plates 33 are correspondingly and fixedly connected to driving ends of two first driving members 34.
Referring to fig. 7-8, the rear lifting mechanism 4 includes a hollow bearing frame 41, a rear wheel 42 is fixedly mounted inside the hollow bearing frame 41, a roller 43 is mounted inside one end of the bearing frame 41 facing the cab 1 through a pin 44, a damping spring 46 is fixedly connected to a top of one end of the bearing frame 41 facing away from the cab 1, a second driving member 47 is fixedly disposed above the damping spring 46, a telescopic end of the second driving member 47 penetrates through the inside of the damping spring 46 and is finally connected to the bearing frame 41 in a hinged manner, one end of the bearing frame 41 facing away from the cab 1 is fixedly provided with a spring fixing groove 45 matched with the damping spring 46 in size.
Referring to fig. 4, the cab 1 includes a cab housing 11 fixedly mounted on a beam of an automobile, a front lifting groove 13 with a size adapted to a bottom of the cab housing 11 is formed at a bottom of the cab housing 11, front wheel extension grooves 12 matched with front wheels 32 are formed at two sides of the bottom of the cab housing 11, the cab 1 further includes four front lifting mechanism mounting holes 14 fixedly formed at an inner bottom end of the cab housing 11, a non-telescopic section of a first driving member 34 is fixedly disposed inside the front lifting mechanism mounting holes 14, and positions of the four front lifting mechanism mounting holes 14 correspond to positions of the four first driving members 34.
Referring to fig. 5, the compartment 2 includes a compartment housing 21 fixedly mounted on a car frame, two sets of rear lifting grooves 22 are symmetrically formed in a rear area of a bottom end surface of the compartment housing 21, each set of rear lifting mechanism 4 is correspondingly mounted inside the two sets of rear lifting grooves 22, two rear wheel expansion grooves 23 are symmetrically formed in a rear section of the bottom of the compartment housing 21, positions of the rear wheel expansion grooves 23 correspond to positions of the rear wheels 42, the compartment 2 further includes two rear lifting mechanism mounting holes 24 correspondingly formed in rear top ends inside the two sets of rear lifting grooves 22, and non-telescopic ends of each second driving member 47 are fixedly disposed inside the rear lifting mechanism mounting holes 24.
When the device is used, when the distance between the cab 1 and the car 2 and the ground needs to be increased, the first driving piece 34 and the second driving piece 47 can be synchronously controlled to extend, the four first driving pieces 34 simultaneously apply acting force to the damping plate 33 to promote the whole cab 1 to rise to a certain height, when the second driving piece 47 extends, the acting force can act on one end of the bearing frame 41, which is far away from the cab 1, along with the extension of the second driving piece 47, the whole bearing frame 41 is promoted to be in a clockwise rotating state, so that one end, adjacent to the cab 1, of the bearing frame 41 is lifted, and the acting force of the second driving piece 47 is indirectly applied to the car 2, and by combining the lifting action of the cab 1, the cab 1 and the car 2 can be synchronously lifted, and the lifting of the car 2 is based on the lever principle, and in the same way, the cab 1 and the car 2 can be synchronously lowered, the bottom of the carriage 2 can be lowered to the maximum extent to be flush with the ground, so that the loading and unloading of goods are facilitated, and the device is safe and reliable.
In this embodiment, the first driving member 34 and the second driving member 47 are both of a hydraulic telescopic cylinder structure, the output power of the second driving member 47 is greater than the output power of the first driving member 34, and both are controlled by a servo, and can act simultaneously, and the structural features, the working principle and the specific circuit structure electrically connected with the outside of the driving member adopt the prior art, and are not detailed herein.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. Truck which can be raised and lowered to the ground, comprising a cab (1) and a cabin (2) forming a tandem structure by means of a girder, characterized in that: the bottom of driver's cabin (1) fixed mounting has preceding elevating system (3) that matches and use, two sets of back elevating system (4) are installed to the bottom bilateral symmetry formula of carriage (2).
2. A cargo vehicle that can be raised and lowered to level ground as claimed in claim 1, wherein: preceding elevating system (3) are including fixed suspension beam (31) that are connected with the girder, the equal fixed mounting in both ends of suspension beam (31) has front wheel (32), the inboard position department that the top of suspension beam (31) just is located two front wheels (32) all corresponds the welding and is provided with two sets of shock attenuation boards (33), every group the drive end of two first driving pieces of fixedly connected with (34) is corresponded at the top both ends of shock attenuation board (33).
3. A cargo vehicle that can be raised and lowered to level ground as claimed in claim 1, wherein: rear lifting mechanism (4) are hollow structure's bearing frame (41) including inside bearing frame (41) hollow structure's inside fixed mounting has rear wheel (42), bearing frame (41) install roller (43) through a round pin axle (44) towards the one end inside of driver's cabin (1), bearing frame (41) deviate from one end top fixedly connected with damping spring (46) of driver's cabin (1), damping spring (46) top is fixed and is provided with second driving piece (47), the flexible end of second driving piece (47) runs through damping spring (46)'s inside to finally be connected through articulated mode between and bearing frame (41).
4. A cargo vehicle that can be raised and lowered to level ground as claimed in claim 1, wherein: the cab (1) comprises a cab shell (11) fixedly mounted on an automobile beam, a front lifting groove (13) matched with the cab shell in size is formed in the bottom of the cab shell (11), and front wheel position-expanding grooves (12) matched with front wheels (32) are formed in the two sides of the bottom of the cab shell (11).
5. A cargo vehicle which can be elevated to level ground according to claim 2, wherein: cab (1) still including fixed four preceding elevating system mounting holes (14) of seting up in the inside bottom of cab housing (11), the fixed inside that sets up elevating system mounting hole (14) in the front in the non-flexible district section of first driving piece (34), the position of four preceding elevating system mounting holes (14) corresponds with the position of four first driving pieces (34).
6. A cargo vehicle that can be raised and lowered to level ground as claimed in claim 1, wherein: the carriage (2) comprises a carriage shell (21) fixedly mounted on a beam of the automobile, two groups of rear lifting grooves (22) are symmetrically formed in the rear side area of the bottom end face of the carriage shell (21), and each group of rear lifting mechanisms (4) is correspondingly mounted inside the two groups of rear lifting grooves (22).
7. A cargo vehicle that can be raised and lowered to level ground as set forth in claim 4, wherein: two rear wheel rubbing grooves (23) are symmetrically formed in the rear section of the bottom of the carriage shell (21), and the positions of the rear wheel rubbing grooves (23) correspond to the positions of the rear wheels (42).
8. A truck capable of ascending and descending on a flat ground according to claim 5, wherein: carriage (2) still including corresponding two back elevating system mounting holes (24) of seting up at the inside rear side top of two sets of back lifting groove (22), the non-flexible end of every second driving piece (47) all fixes the inside that sets up in back elevating system mounting hole (24).
9. A cargo vehicle that can be raised and lowered to level ground as claimed in claim 1, wherein: and a spring fixing groove (45) matched with the size of the damping spring (46) is fixedly formed in the end face of the top of one end of the bearing frame (41) deviating from the cab (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911331287.5A CN110843637A (en) | 2019-12-21 | 2019-12-21 | Cargo vehicle capable of lifting to flat ground |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911331287.5A CN110843637A (en) | 2019-12-21 | 2019-12-21 | Cargo vehicle capable of lifting to flat ground |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110843637A true CN110843637A (en) | 2020-02-28 |
Family
ID=69610131
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911331287.5A Pending CN110843637A (en) | 2019-12-21 | 2019-12-21 | Cargo vehicle capable of lifting to flat ground |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110843637A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB860338A (en) * | 1959-06-29 | 1961-02-01 | Thompson Trailer Corp | Road vehicle having vertically adjustable frame |
| EP0330776A1 (en) * | 1988-03-01 | 1989-09-06 | Hubert T. Kleysen | Drop deck trailer van construction |
| JPH0737864U (en) * | 1993-12-24 | 1995-07-14 | 日野自動車工業株式会社 | Shock absorber for car cab suspension |
| RU2414373C1 (en) * | 2010-01-27 | 2011-03-20 | Открытое акционерное общество "КАМАЗ" | Transport facility cabin suspension (versions) |
| KR20120001216A (en) * | 2010-06-29 | 2012-01-04 | 현대자동차주식회사 | Tilting device of cab truck |
| US20130315696A1 (en) * | 2009-12-23 | 2013-11-28 | Roadload Limited | Vehicle Chassis |
| CN106515538A (en) * | 2017-01-17 | 2017-03-22 | 王孺牛 | Motor vehicle capable of controlling compartment to move upwards and downwards |
| CN211731153U (en) * | 2019-12-21 | 2020-10-23 | 广州百靓科技有限公司 | Cargo vehicle capable of lifting to flat ground |
-
2019
- 2019-12-21 CN CN201911331287.5A patent/CN110843637A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB860338A (en) * | 1959-06-29 | 1961-02-01 | Thompson Trailer Corp | Road vehicle having vertically adjustable frame |
| EP0330776A1 (en) * | 1988-03-01 | 1989-09-06 | Hubert T. Kleysen | Drop deck trailer van construction |
| JPH0737864U (en) * | 1993-12-24 | 1995-07-14 | 日野自動車工業株式会社 | Shock absorber for car cab suspension |
| US20130315696A1 (en) * | 2009-12-23 | 2013-11-28 | Roadload Limited | Vehicle Chassis |
| RU2414373C1 (en) * | 2010-01-27 | 2011-03-20 | Открытое акционерное общество "КАМАЗ" | Transport facility cabin suspension (versions) |
| KR20120001216A (en) * | 2010-06-29 | 2012-01-04 | 현대자동차주식회사 | Tilting device of cab truck |
| CN106515538A (en) * | 2017-01-17 | 2017-03-22 | 王孺牛 | Motor vehicle capable of controlling compartment to move upwards and downwards |
| CN211731153U (en) * | 2019-12-21 | 2020-10-23 | 广州百靓科技有限公司 | Cargo vehicle capable of lifting to flat ground |
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