CN111591929B - Five-stage forklift lifting system and application method thereof - Google Patents
Five-stage forklift lifting system and application method thereof Download PDFInfo
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- CN111591929B CN111591929B CN202010569606.2A CN202010569606A CN111591929B CN 111591929 B CN111591929 B CN 111591929B CN 202010569606 A CN202010569606 A CN 202010569606A CN 111591929 B CN111591929 B CN 111591929B
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- 238000000034 method Methods 0.000 title claims description 14
- 230000000694 effects Effects 0.000 abstract description 6
- 239000000243 solution Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 210000004258 portal system Anatomy 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012163 sequencing technique Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
Classifications
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- 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
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/075—Constructional features or details
- B66F9/08—Masts; Guides; Chains
-
- 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
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/075—Constructional features or details
- B66F9/20—Means for actuating or controlling masts, platforms, or forks
- B66F9/22—Hydraulic devices or systems
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
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- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Forklifts And Lifting Vehicles (AREA)
Abstract
The invention relates to a five-stage forklift lifting system which comprises a primary portal, wherein a first yielding port is formed in the top surface of the primary portal, a secondary portal which is parallel to the primary portal is slidably connected to the inner side of the primary portal, a second yielding port is formed in the top surface of the secondary portal, a tertiary portal which is parallel to the secondary portal is slidably connected to the inner side of the secondary portal, a third yielding port is formed in the top surface of the tertiary portal, a four-stage portal which is parallel to the tertiary portal is slidably connected to the inner side of the tertiary portal, a fourth yielding port is formed in the top surface of the four-stage portal, a five-stage portal which is parallel to the four-stage portal is slidably connected to the inner side of the four-stage portal, a fork frame is slidably connected to one side of the five-stage portal, and a fork body is fixedly connected to the bottom of one side of the fork frame, which is far away from the five-stage portal. The invention has the effects of reducing the initial height of the forklift mast and improving the passing capacity and lifting height of the vehicle.
Description
Technical Field
The invention relates to the technical field of forklifts, in particular to a five-stage forklift lifting system and a using method thereof.
Background
At present, a forklift lifting system is a working device of industrial vehicles such as a forklift and the like, and can realize the operations of forking, lifting and stacking goods. In order to solve the contradiction between the maximum lifting height and the required low structural height during the operation in the loading and unloading operation. The lifting system can generally consist of multiple stages of door frames, and the door frames with more stages can be lifted higher under the condition of the same initial height. The prior market mainly comprises two-stage masts and three-stage masts, more than three-stage masts are needed in shipyards and basements, and no more than three-stage masts exist in China at present due to technical and cost reasons.
The prior art scheme can refer to the Chinese patent of application publication number CN101717058A, which discloses a fork truck outer mast, comprising an outer mast support column and a mast support device, wherein the outer mast support column is arranged on the mast support device, the mast support device comprises a support piece and wing plates which are arranged at two ends of the support piece in a front-back symmetrical way, the wing plates are mutually perpendicular to the support piece, the support piece consists of a support piece web plate and a support table surface arranged on the outer side wall of the support piece web plate, the support table surface is arranged right above a fork truck tire, the outer mast support column is erected on the support table surface, and the support piece web plate and the front wing plate and the rear wing plate form a cavity for inserting a middle mast.
The prior art solutions described above have the following drawbacks: at present, the most common forklift mast in China is three-level and below, along with the continuous increase of the storage demand of goods, a large number of stereoscopic warehouses are present, the height of the goods shelves of the warehouses is very high (generally about six meters) but the doors of the warehouses are generally shorter (generally in the range of two meters to two meters and five meters), so that the conventional three-level mast (the stowage state height is less than two-point five meters and the deployment state is approximately four meters to five meters) can smoothly enter the warehouses, but articles on the goods shelves cannot be placed and taken, and if the single-level height of the conventional three-level mast is increased, the forklift cannot smoothly enter the doors of the warehouses.
Disclosure of Invention
Aiming at the defects of the prior art, one of the purposes of the invention is to provide a five-stage forklift lifting system which reduces the initial height of a forklift mast and improves the vehicle passing capacity and lifting height.
The above object of the present invention is achieved by the following technical solutions:
A five-stage forklift lifting system comprises a primary portal, wherein a first yielding port is formed in the top surface of the primary portal, a secondary portal which is parallel to the primary portal is connected to the inner side of the primary portal in a sliding manner, and the secondary portal can slide along the length direction of the primary portal;
the top surface of the secondary portal is provided with a second abdicating port, the inner side of the secondary portal is connected with a tertiary portal arranged parallel to the secondary portal in a sliding manner, and the tertiary portal can slide along the length direction of the secondary portal;
a third abdicating port is formed in the top surface of the three-stage portal frame, a four-stage portal frame which is parallel to the three-stage portal frame is connected to the inner side of the three-stage portal frame in a sliding mode, and the four-stage portal frame can slide along the length direction of the three-stage portal frame;
a fourth abdicating port is formed in the top surface of the four-stage door frame, a five-stage door frame which is parallel to the four-stage door frame is connected to the inner side of the four-stage door frame in a sliding mode, and the five-stage door frame can slide along the length direction of the four-stage door frame;
Five-stage portal one side sliding connection has the fork frame, and the fork can be followed the length direction slip of five-stage portal, and one side bottom fixedly connected with fork body that five-stage portal was kept away from to the fork frame.
Through adopting above-mentioned technical scheme, when not needing to place or pick up the eminence article, can slide down all portals, the secondary portal can be accomodate in the primary portal is inboard, tertiary portal can be accomodate in the secondary portal is inboard, and so on, all portals can all be accomodate in the primary portal is inboard, thereby make things convenient for fork truck to pass through the higher position such as door frame or container, when needs use, because there are five portals, after stretching out completely, compare with current tertiary portal, can reach the height more than twice of tertiary portal, realize getting the operation of putting of eminence article.
The present invention may be further configured in a preferred example to: the outer side wall of the secondary portal frame is rotationally connected with a second outer roller, a first inner chute arranged along the length direction of the primary portal frame is arranged at the position of the inner side wall of the primary portal frame corresponding to the second outer roller, and the second outer roller is slidingly connected in the first inner chute;
The outer side wall of the three-stage portal frame is rotationally connected with a third outer roller, a second inner chute arranged along the length direction of the two-stage portal frame is arranged at the position of the inner side wall of the two-stage portal frame corresponding to the third outer roller, and the third outer roller is slidingly connected in the second inner chute;
The outer side wall of the four-stage portal frame is rotationally connected with a fourth outer roller, a third inner chute arranged along the length direction of the three-stage portal frame is arranged at the position of the inner side wall of the three-stage portal frame corresponding to the fourth outer roller, and the fourth outer roller is slidingly connected in the third inner chute;
A fifth outer roller is rotationally connected to the outer side wall of the fifth-stage portal, a fourth inner chute arranged along the length direction of the fourth-stage portal is formed in the position, corresponding to the fifth outer roller, of the inner side wall of the fourth-stage portal, and the fifth outer roller is slidingly connected to the fourth inner chute;
The fork frame is connected with fork frame gyro wheel in the position department rotation of five-stage portal inboard, and the position department of five-stage portal inside wall corresponding fork frame gyro wheel has seted up the fifth interior spout that sets up along the length direction of five-stage portal, fork frame gyro wheel sliding connection in fifth interior spout.
Through adopting above-mentioned technical scheme, realize the slip between the portal at every stage through the gyro wheel, can cooperate the spacing effect of spout and gyro wheel, effectively restrict the slip direction between the portal to ensure that the portal can be stable slide along the length direction of one-level portal.
The present invention may be further configured in a preferred example to: the inner side wall of the primary portal frame is rotationally connected with a first inner roller, a second outer chute arranged along the length direction of the secondary portal frame is arranged at the position of the outer side wall of the secondary portal frame corresponding to the first inner roller, and the first inner roller is slidingly connected in the second outer chute;
the inner side wall of the secondary portal frame is rotationally connected with a second inner roller, a third outer chute arranged along the length direction of the tertiary portal frame is arranged at the position of the outer side wall of the tertiary portal frame corresponding to the second inner roller, and the second inner roller is slidingly connected in the third outer chute;
the inner side wall of the third-stage portal frame is rotationally connected with a third inner roller, a fourth outer chute arranged along the length direction of the fourth-stage portal frame is arranged at the position of the outer side wall of the fourth-stage portal frame corresponding to the third inner roller, and the third inner roller is slidingly connected in the fourth outer chute;
The inner side wall of the fourth-stage portal frame is rotationally connected with a fourth inner roller, a fifth outer chute arranged along the length direction of the fifth-stage portal frame is arranged at the position of the outer side wall of the fifth-stage portal frame corresponding to the fourth inner roller, and the fourth inner roller is slidably connected in the fifth outer chute.
Through adopting above-mentioned technical scheme, the cooperation of interior gyro wheel and outer gyro wheel can realize the restriction to each level portal relatively sliding completely on the one hand, and the guarantee portal at all levels only can slide along the length direction of one-level portal, on the other hand, through the setting of interior gyro wheel and outer gyro wheel, when portal at all levels is expanded, the distance between interior gyro wheel and between the outer gyro wheel on the different portal can increase, and the arm of force becomes long, can effectively reduce the atress of interior gyro wheel and outer gyro wheel, improves the loadability of portal system.
The present invention may be further configured in a preferred example to: the primary portal is fixedly connected with a cylinder body of a primary hydraulic cylinder, a piston rod of the primary hydraulic cylinder is arranged along the length direction of the primary portal, and the secondary portal is fixedly connected with the end part of the piston rod of the primary hydraulic cylinder;
The cylinder body of the three-stage oil hydraulic cylinder is fixedly connected to the three-stage portal, a piston rod of the three-stage oil hydraulic cylinder is arranged along the length direction of the three-stage portal, and the four-stage portal is fixedly connected to the end part of the piston rod of the three-stage oil hydraulic cylinder;
The five-stage portal is fixedly connected with a cylinder body of a five-stage oil hydraulic cylinder, a piston rod of the five-stage oil hydraulic cylinder is arranged along the length direction of the five-stage portal, and the end part of the piston rod of the five-stage oil hydraulic cylinder is fixedly connected with the fork frame.
Through adopting above-mentioned technical scheme, when the need lifts the second grade portal, the piston rod of drive one-level oil hydraulic cylinder stretches out, alright lifting second grade portal, the same way, the piston rod of drive tertiary oil hydraulic cylinder stretches out, can lift the fourth grade portal, when the fork frame of needs lifting, the piston rod of control fifth grade oil hydraulic cylinder stretches out, can upwards slide the fifth sprocket, because the one end of fifth chain and the cylinder body fixed connection of fifth grade oil hydraulic cylinder, when the fifth sprocket upwards slides, the fifth chain can slide relative the fifth sprocket, thereby the lifting fork frame, compare and carry out fork frame lifting in the direct oil hydraulic cylinder that uses, the cooperation fifth chain can be when retrieving the piston rod of fifth grade oil hydraulic cylinder with the fork frame totally downwardly sliding to fifth grade portal bottom, thereby, convenient and practical fork carries out object transport.
The present invention may be further configured in a preferred example to: the two sides of the top of the secondary portal are respectively and rotatably connected with a second chain wheel, the central axes of the second chain wheels are respectively and vertically arranged in the length direction of the secondary portal, second chains are respectively and fixedly arranged on the second chain wheels, one ends of the second chains are respectively and fixedly connected with the top of the primary portal, and the other ends of the second chains are respectively and fixedly connected with the bottom of the tertiary portal;
the four-stage portal top both sides all rotate and are connected with the fourth sprocket, and the axis of fourth sprocket all is perpendicular to the length direction setting of four-stage portal, has all set up the fourth chain on the fourth sprocket, and the equal fixed connection in tertiary portal top of one end of two fourth chains, the equal fixed connection in five-stage portal bottoms of the other end.
Through adopting above-mentioned technical scheme, when lifting the second portal, because second chain both ends are fixed connection respectively in one-level portal top and tertiary portal bottom, along with the second portal rises, the chain can slide and the tertiary portal of pulling rises, finally, can lift the tertiary portal when lifting the second portal, accomplish the expansion operation of one-level portal, second portal and tertiary portal, in the same way, when lifting the fourth portal, the lifting to the five-level portal can be realized to the fourth chain cooperation fourth sprocket, thereby, only need drive one-level oil hydraulic cylinder and tertiary oil hydraulic cylinder, just can expand all five-level portal.
The present invention may be further configured in a preferred example to: the cylinder bodies of the two primary oil hydraulic cylinders are fixedly connected with a first oil conveying pipe together, the middle part of the first oil conveying pipe is fixedly connected with a main oil inlet pipe, the middle part of the main oil inlet pipe is provided with an oil inlet hole for connecting an oil supply device, and the main oil inlet pipe is provided with a first speed limiting valve;
A third oil delivery pipe is fixedly connected between the cylinder bodies of the two three-stage oil hydraulic cylinders, a third speed limiting valve is arranged in the middle of the third oil delivery pipe, and one end, far away from the third oil delivery pipe, of the third speed limiting valve is fixedly connected with one end, far away from the first oil delivery pipe, of the main oil inlet pipe;
a fifth oil delivery pipe is connected to the third oil delivery pipe, and one end of the fifth oil delivery pipe, which is far away from the third oil delivery pipe, is fixedly connected with the cylinder body of the five-stage oil hydraulic cylinder;
The total oil inlet pipe and the fifth oil delivery pipe are both hoses.
Through adopting above-mentioned technical scheme, through total oil pipe and first oil pipe, can be convenient with the operation of oil input one-level oil pressure jar, carry out one-level oil pressure jar, the setting of first speed limit valve, can restrict the speed of oil input one-level oil pressure jar, thereby ensure that the piston rod of one-level oil pressure jar can stretch out at the uniform velocity or shrink, reduce the probability that the drop problem appears in the drop stability of portal that the violent lifting of piston rod of one-level oil pressure jar leads to, in the same way, the piston rod of third speed limit valve can ensure tertiary oil pressure jar and the piston rod of five-level oil pressure jar rise and drop stability, in incorporating unified oil supply device with all oil pressure jar, the oil of all oil pressure jar is all through total oil pipe input, can improve the oil supply complex stability between each oil pressure jar.
The present invention may be further configured in a preferred example to: the top of the secondary portal is rotationally connected with a second oil delivery wheel, the central axis of the second oil delivery wheel is perpendicular to the length direction of the secondary portal, the main oil inlet pipe is arranged by bypassing the second oil delivery wheel from the top, the top of the quaternary portal is rotationally connected with a fourth oil delivery wheel, the central axis of the fourth oil delivery wheel is perpendicular to the length direction of the quaternary portal, and the fifth oil delivery pipe is arranged by bypassing the fourth oil delivery wheel from the top.
Through adopting above-mentioned technical scheme, when the portal is lifted, the second oil delivery wheel can restrict total oil pipe gliding position, and fourth oil delivery wheel can stabilize the sliding position of fifth oil pipe to reduce total oil pipe or fifth oil pipe and expand or the probability of being extruded or wearing and tearing when shrink by the portal, improve total oil pipe and fifth oil pipe's stability, the life of total oil pipe and fifth oil pipe of extension.
The present invention may be further configured in a preferred example to: the first oil delivery pipe is provided with a first relief valve at a position close to the primary oil hydraulic cylinder.
Through adopting above-mentioned technical scheme, the setting of relief valve can be when meetting oil circuit faults such as total oil pipe or first oil pipe burst, ensures that the system can slowly descend, can not drop ground fast to the stability to article support when the guarantee trouble.
Aiming at the defects existing in the prior art, the second purpose of the invention is to provide a method for using a five-stage forklift lifting system, which can control the five-stage forklift lifting system to completely and freely lift and fall.
The above object of the present invention is achieved by the following technical solutions:
a method for using a five-stage forklift lifting system for controlling the five-stage forklift lifting system as claimed in claim 6, characterized in that:
s1, connecting a main oil inlet pipe and an oil supply device;
S2, lifting and supplying oil to the total oil inlet pipe;
s3, recovering, and extracting oil in the total oil inlet pipe.
Through adopting above-mentioned technical scheme, when carrying out the use of five-stage fork truck lifting system, earlier with oil supply unit connect on indulging the oil pipe, alright through the oil supply or the extraction to total oil pipe, realize the lifting or the decline operation to the portal.
The present invention may be further configured in a preferred example to: the working pressures of the primary hydraulic cylinder, the tertiary hydraulic cylinder and the five-stage hydraulic cylinder are ordered as the primary hydraulic cylinder > the tertiary hydraulic cylinder > the five-stage hydraulic cylinder. Through adopting above-mentioned technical scheme, through carrying out pressure size sequencing and adjustment to the oil pressure jar at every stage, because all oil pressure jar are under same oil supply unit, and the piston rod of the great oil pressure jar of pressure is harder to be released, thereby keep the in-process at the lifting, the piston rod of the five-stage oil pressure jar that rises earlier that homoenergetic is stable, the piston rod of the three-stage oil pressure jar of lifting again, the piston rod of the one-stage oil pressure jar of lifting finally, the piston rod of the one-stage oil pressure jar of descending order first descends, the piston rod of the three-stage oil pressure jar, the piston rod of the five-stage oil pressure jar of last, on the one hand, can keep portal lifting descending order, thereby improve the stability when article supports and gets and put, on the other hand, can keep the independence of five-stage oil pressure jar through the pressure design, five-stage oil pressure jar is the lifting foremost, can make things convenient for practical this system highly lower space such as container to carry out the operation.
In summary, the present invention includes at least one of the following beneficial technical effects:
1. the initial height of the forklift gantry is reduced, the vehicle passing capacity is improved, the five-stage hydraulic cylinder is fully and freely lifted and can enter a container for operation, and compared with the common two-stage gantry, the same static height is increased by 2.5 times;
2. The four positions are used for conducting stress, namely the connection of the primary portal and the secondary portal, the connection of the secondary portal and the tertiary portal, the connection of the tertiary portal and the quaternary portal and the connection of the quaternary portal and the pentaportal, and the stress points are increased at the same lifting height, so that the stress of the whole portal can be dispersed, and the stability and the rigidity of the portal during the maximum lifting are provided;
3. The arrangement of the speed limiting valves and the first safety valves can ensure that the descending speed meets the standard, and is stable and free from bouncing.
Drawings
FIG. 1 is an overall schematic of example 1;
FIG. 2 is an exploded view of the structure of the primary portal of example 1;
FIG. 3 is a partial exploded view of the first oil delivery pipe structure of example 2;
FIG. 4 is a partial exploded view of the fifth oil delivery pipe structure of example 2;
Fig. 5 is a partial sectional view showing the structure of the protruding safety valve in embodiment 2.
In the figure, 1, a primary portal; 11. a first relief port; 12. a first inner chute; 13. a first inner roller; 14. a primary oil hydraulic cylinder; 2. a secondary portal; 21. a second relief port; 22. a second inner chute; 23. a second inner roller; 24. a second outer roller; 25. a second outer chute; 26. a second sprocket; 27. a second chain; 3. a three-stage portal frame; 31. a third abdication port; 32. a third inner chute; 33. a third inner roller; 34. a third outer roller; 35. a third outer chute; 36. a three-stage oil hydraulic cylinder; 4. a four-stage portal; 41. a fourth abdication port; 42. a fourth inner chute; 43. a fourth inner roller; 44. a fourth outer roller; 45. a fourth outer chute; 46. a fourth sprocket; 47. a fourth chain; 5. a five-stage portal; 52. a fifth inner chute; 54. a fifth outer roller; 55. a fifth outer chute; 56. a five-stage oil hydraulic cylinder; 57. a fifth sprocket; 58. a fifth chain; 6. a fork rack; 61. a fork body; 62. fork frame idler wheels; 7. a main oil inlet pipe; 71. a first oil delivery pipe; 711. a first speed limiting valve; 712. a second tanker; 72. a first safety valve; 73. a third oil delivery pipe; 731. a third speed limiting valve; 732. a fourth tanker; 74. and a fifth oil delivery pipe.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Example 1:
Fig. 1 is a diagram showing a five-stage forklift lifting system according to the present invention, which includes a primary gantry 1, a secondary gantry 2 slidably connected to the inner side of the primary gantry 1, a tertiary gantry 3 slidably connected to the inner side of the secondary gantry 2, a quaternary gantry 4 slidably connected to the inner side of the tertiary gantry 3, a five-stage gantry 5 slidably connected to the inner side of the quaternary gantry 4, a fork frame 6 slidably connected to one side of the five-stage gantry 5, and a plurality of fork bodies 61 fixedly connected to the bottom of the fork frame 6. When the lifting device is used, the fork body 61 can be used for supporting an object, and all the door frames are sequentially extended, so that the lifting operation of the object is realized.
Referring to fig. 1 and 2, a first yielding port 11 is formed in the top surface of the primary portal 1. The bottom of the outer side wall of the secondary portal frame 2 is rotationally connected with a second outer roller 24, a first inner chute 12 arranged along the length direction of the primary portal frame 1 is arranged at the position of the inner side wall of the primary portal frame 1 corresponding to the second outer roller 24, and the second outer roller 24 is slidingly connected in the first inner chute 12. The top of the inner side wall of the primary portal 1 is rotationally connected with a first inner roller 13, a second outer chute 25 arranged along the length direction of the secondary portal 2 is arranged at the position of the outer side wall of the secondary portal 2 corresponding to the first inner roller 13, and the first inner roller 13 is slidingly connected in the second outer chute 25. The cylinder bodies of the primary hydraulic cylinders 14 are fixedly connected to the two sides of the primary portal frame 1, the piston rods of the primary hydraulic cylinders 14 are arranged along the length direction of the primary portal frame 1, and the secondary portal frame 2 is fixedly connected to the end parts of the piston rods of the two primary hydraulic cylinders 14. When the piston rod of the primary hydraulic cylinder 14 is retracted, the secondary door frame 2 is stored inside the primary door frame 1, and when the piston rod of the primary hydraulic cylinder 14 is extended, the secondary door frame 2 is extended out of the primary door frame 1. When the secondary portal 2 is required to be driven to slide upwards, the piston rod of the primary hydraulic cylinder 14 is driven to extend, so that the height of the secondary portal 2 can be increased, and the secondary portal 2 can be ensured to slide smoothly along the length direction of the primary portal 1 due to the limiting of the first inner roller 13 and the second outer roller 24.
Referring to fig. 1 and 2, a second yielding port 21 is formed in the top surface of the secondary gantry 2. The bottom of the outer side wall of the three-stage portal frame 3 is rotationally connected with a third outer roller 34, a second inner chute 22 arranged along the length direction of the two-stage portal frame 2 is arranged at the position of the inner side wall of the two-stage portal frame 2 corresponding to the third outer roller 34, and the third outer roller 34 is slidably connected in the second inner chute 22. The top of the inner side wall of the secondary portal 2 is rotationally connected with a second inner roller 23, a third outer chute 35 arranged along the length direction of the tertiary portal 3 is arranged at the position of the outer side wall of the tertiary portal 3 corresponding to the second inner roller 23, and the second inner roller 23 is slidably connected in the third outer chute 35. The two sides of the top of the secondary portal 2 are respectively and rotatably connected with a second chain wheel 26, the central axis of the second chain wheel 26 is perpendicular to the length direction of the secondary portal 2, a second chain 27 is respectively and rotatably arranged on the second chain wheel 26, one end of the second chain 27 is fixedly connected to the top of the primary portal 1, and the other end of the second chain 27 is fixedly connected to the bottom of the tertiary portal 3. When lifting the secondary portal 2, because the second chain 27 is equal in length, along with the upward sliding of the secondary portal 2, the second chain 27 can slide relatively with the second sprocket 26, and the lifting of the tertiary portal 3 is pulled, thereby, the piston rod through driving the primary hydraulic cylinder 14 stretches out, the effect of lifting the secondary portal 2 and lifting the tertiary portal 3 can be realized simultaneously, compared with direct hydraulic cylinder driving, the stability of lifting the tertiary portal 3 can be effectively improved through the cooperation of the second chain 27 and the second sprocket 26 in a linkage mode, and the systematicness and the orderly performance of lifting the tertiary portal 3 and the lifting of the secondary portal 2 are improved.
Referring to fig. 1 and 2, a third abdication port 31 is formed on the top surface of the three-stage portal frame 3. The bottom of the outer side wall of the four-stage portal frame 4 is rotationally connected with a fourth outer roller 44, a third inner chute 32 arranged along the length direction of the three-stage portal frame 3 is arranged at the position of the inner side wall of the three-stage portal frame 3 corresponding to the fourth outer roller 44, and the fourth outer roller 44 is slidably connected in the third inner chute 32. The top of the inner side wall of the three-stage portal frame 3 is rotationally connected with a third inner roller 33, a fourth outer chute 45 arranged along the length direction of the four-stage portal frame 4 is formed in the position of the outer side wall of the four-stage portal frame 4 corresponding to the third inner roller 33, and the third inner roller 33 is slidably connected in the fourth outer chute 45. The cylinder body of the three-stage oil hydraulic cylinder 36 is fixedly connected to the three-stage portal 3, a piston rod of the three-stage oil hydraulic cylinder 36 is arranged along the length direction of the three-stage portal 3, and the four-stage portal 4 is fixedly connected to the end part of the piston rod of the three-stage oil hydraulic cylinder 36. When the four-stage portal 4 is required to be driven to be lifted, the driving action of the four-stage portal 4 can be completed by driving the piston rod of the three-stage oil hydraulic cylinder 36 to be lifted. The three-stage oil hydraulic cylinder 36 is used for driving the four-stage portal 4, so that operators can conveniently lift the four-stage portal 4 alone or lift the two-stage portal 2 and the three-stage portal 3, and the height of a final fork can be adjusted.
Referring to fig. 1 and 2, a fourth relief port 41 is provided in the top surface of the four-stage mast 4. The bottom of the outer side wall of the five-stage portal 5 is rotationally connected with a fifth outer roller 54, a fourth inner chute 42 arranged along the length direction of the four-stage portal 4 is arranged at the position of the inner side wall of the four-stage portal 4 corresponding to the fifth outer roller 54, and the fifth outer roller 54 is slidingly connected in the fourth inner chute 42. The top of the inner side wall of the fourth-stage portal 4 is rotationally connected with a fourth inner roller 43, a fifth outer chute 55 arranged along the length direction of the fifth-stage portal 5 is arranged at the position of the outer side wall of the fifth-stage portal 5 corresponding to the fourth inner roller 43, and the fourth inner roller 43 is slidably connected in the fifth outer chute 55. The four-stage portal 4 is provided with a fourth chain wheel 46 in a rotating mode on two sides of the top of the four-stage portal 4, the central axis of the fourth chain wheel 46 is perpendicular to the length direction of the four-stage portal 4, a fourth chain 47 is arranged on the fourth chain wheel 46, one ends of the two fourth chains 47 are fixedly connected to the top of the three-stage portal 3, and the other ends of the two fourth chains 47 are fixedly connected to the bottom of the five-stage portal 5. Similar to the method of lifting the tertiary mast 3 described above, the fourth chain 47 pulls the lifting of the tertiary mast 5 when lifting the quaternary mast 4, in other words, the quaternary mast 4 and the quaternary mast 5 are simultaneously lifted and unfolded and simultaneously retracted and restored.
Referring to fig. 1 and 2, all the forks 61 are arranged in a row along the width direction of the five-stage mast 5, and all the forks 61 are arranged perpendicular to the plane of the fork carriage 6. The fork frame 6 is rotatably connected with a fork frame roller 62 corresponding to the position of the inner side of the five-stage portal frame 5, a fifth inner chute 52 arranged along the length direction of the five-stage portal frame 5 is arranged at the position of the inner side wall of the five-stage portal frame 5 corresponding to the fork frame roller 62, and the fork frame roller 62 is slidably connected in the fifth inner chute 52. The five-stage portal 5 is fixedly connected with a cylinder body of a five-stage hydraulic cylinder 56, a piston rod of the five-stage hydraulic cylinder 56 is arranged along the length direction of the five-stage portal 5, a fifth chain wheel 57 is rotatably connected to the end part of the piston rod of the five-stage hydraulic cylinder 56, the central axis of the fifth chain wheel 57 is arranged along the direction perpendicular to the length direction of the five-stage portal 5 and parallel to the plane where the five-stage portal 5 is located, a fifth chain 58 is erected on the fifth chain wheel 57, one end of the fifth chain 58 is fixedly connected to the top of the cylinder body of the five-stage hydraulic cylinder 56, and the other end of the fifth chain 58 is fixedly connected to the bottom of the fork frame 6. At ordinary times, the fork frame 6 can slide to the bottom of the five-stage portal 5 under the limit of the fifth chain 58, so that the fork body 61 is lower, the fork of low-position goods is convenient to take, when an object needs to be lifted, if only a small distance needs to be lifted, the five-stage portal can not be slid, only the five-stage hydraulic cylinder 56 is started to lift the fifth chain wheel 57, and the fork frame 6 is lifted in cooperation with the fifth chain 58, so that the fork body 61 and the object are lifted. The five-stage hydraulic cylinder 56 is freely arranged, so that the cargo can be conveniently lifted in a narrow environment such as a container or the like at a small distance, and the flexibility and convenience of the system are improved.
The implementation principle of the embodiment is as follows: when carrying goods, accomodate all portals earlier and slide fork frame 6 to five-stage portal 5 bottoms, place the goods on fork body 61, when needs with the goods lifting, the piston rod of drive one-level oil hydraulic cylinder 14 stretches out, the relative two-stage portal 2 lifting of lifting two-stage portal 2 and control three-stage portal 3, the piston rod of drive three-stage oil hydraulic cylinder 36 stretches out, the relative four-stage portal 4 lifting of five-stage portal 5 is controlled in the lifting four-stage portal 4, the piston rod of drive five-stage oil hydraulic cylinder 56 stretches out, lifting fork frame 6, alright with the goods lifting to the unreachable height of ordinary fork truck portal system, realize placing the effect in the eminence with the goods.
Example 2: on the basis of embodiment 1, referring to fig. 1 and 2, a first oil delivery pipe 71 is fixedly connected between the cylinder bodies of the two-stage oil hydraulic cylinders 14, a main oil inlet pipe 7 is fixedly connected to the middle part of the first oil delivery pipe 71, an oil inlet hole for connecting an oil supply device is formed in the middle part of the main oil inlet pipe 7, and a first speed limiting valve 711 is arranged on the main oil inlet pipe 7. The first relief valve 72 is provided at a position of the first oil delivery pipe 71 close to the primary hydraulic cylinder 14. When the piston rod of the primary oil hydraulic cylinder 14 needs to be driven to slide, oil can be injected into the oil inlet hole to lift the piston rod of the primary oil hydraulic cylinder 14, the piston rod of the primary oil hydraulic cylinder 14 can be lifted at a uniform speed in the oil injection process, the piston rod of the primary oil hydraulic cylinder 14 can be stably lowered when the oil supply device is invalid or damaged due to the arrangement of the first safety valve 72, and the probability of damage and damage of articles caused by too fast descending speed of the piston rod of the oil hydraulic cylinder is reduced.
Referring to fig. 1 and 2, a third oil delivery pipe 73 is fixedly connected between the cylinder bodies of the two three-stage oil hydraulic cylinders 36, a third speed limiting valve 731 is arranged in the middle of the third oil delivery pipe 73, and one end, far away from the third oil delivery pipe 73, of the third speed limiting valve 731 is fixedly connected with one end, far away from the first oil delivery pipe 71, of the total oil inlet pipe 7. The end parts of the third oil delivery pipe 73, which are close to the three-stage oil hydraulic cylinders 36, are connected with third safety valves. The third oil delivery pipe 73 is connected with a fifth oil delivery pipe 74, and one end of the fifth oil delivery pipe 74, which is far away from the third oil delivery pipe 73, is fixedly connected with the cylinder body of the five-stage oil hydraulic cylinder 56. A fifth relief valve is connected to one end of the fifth oil delivery pipe 74 near the five-stage oil hydraulic cylinder 56. The top of the two-stage portal frame 2 is rotationally connected with a second oil delivery wheel 712, the central axis of the second oil delivery wheel 712 is perpendicular to the length direction of the two-stage portal frame 2, the total oil inlet pipe 7 is arranged by bypassing the second oil delivery wheel 712 from the top, the top of the four-stage portal frame 4 is rotationally connected with a fourth oil delivery wheel 732, the central axis of the fourth oil delivery wheel 732 is perpendicular to the length direction of the four-stage portal frame 4, and the fifth oil delivery pipe 74 is arranged by bypassing the fourth oil delivery wheel 732 from the top. The total oil inlet pipe 7 and the fifth oil delivery pipe 74 are rubber pipes.
The implementation principle of the embodiment is as follows: when the hydraulic cylinders are driven, oil is added to the main oil inlet pipe 7, and the oil can be conveyed to the primary hydraulic cylinder 14, the tertiary hydraulic cylinder 36 and the fifth hydraulic cylinder 56 by using the same oil supply device, so that systematic lifting and lowering of all the portal frames are realized.
Example 3:
On the basis of embodiment 2, the invention discloses a method for using a five-stage forklift lifting system for controlling the five-stage forklift lifting system, which is characterized in that:
S1, connecting a main oil inlet pipe 7 and an oil supply device; the oil supply device is a common and existing device on a forklift, and is one of standard devices of the forklift because the lifting of a gantry of the forklift is usually realized by using an existing oil hydraulic cylinder.
The working pressures of the primary hydraulic cylinder 14, the tertiary hydraulic cylinder 36 and the five-stage hydraulic cylinder 56 are ordered as the magnitude of the working pressures of the primary hydraulic cylinder 14, the tertiary hydraulic cylinder 36 and the five-stage hydraulic cylinder 56.
S2, lifting and supplying oil to the total oil inlet pipe 7. Because the pressure designs of the different hydraulic cylinders are different, according to the pressure designs, when the oil is supplied to the main oil inlet pipe 7, the five-stage hydraulic cylinder 56 can be driven firstly, and then the three-stage hydraulic cylinder 36 and the one-stage hydraulic cylinder 14 can be driven sequentially, so that the five-stage hydraulic cylinder 56 can be driven preferentially, and the cargo with low height can be lifted conveniently and the system can be lifted and carried conveniently in a narrow space such as a container.
S3, recovering, and extracting oil in the total oil inlet pipe 7. According to the design, when the hydraulic system is restored, the primary hydraulic cylinder 14 is driven firstly, and then the tertiary hydraulic cylinder 36 and the five-stage hydraulic cylinder 56 are arranged, the primary hydraulic cylinder 14 is driven preferentially in the descending process, so that the multi-layer portal frame is stably supported below when the subsequent portal frame slides downwards, and the stability in the descending process can be ensured.
The implementation principle of the embodiment is as follows: through the pressure size design to the first-level oil hydraulic cylinder 14, the third-level oil hydraulic cylinder 36 and the fifth-level oil hydraulic cylinder 56, the system can be ensured to adapt to operations in different heights and different scenes through an oil supply device, the adaptability and the flexibility of the system are improved, and meanwhile, the systematicness is improved. Because the pressure of the five-stage hydraulic cylinder 56 is minimal, it will be lifted first, and a single lifting effect on the five-stage hydraulic cylinder can be achieved, thereby allowing the system to lift only the fork carriage 6, facilitating work in environments with low space heights.
The embodiments of the present invention are all preferred embodiments of the present invention, and are not intended to limit the scope of the present invention in this way, therefore: all equivalent changes in structure, shape and principle of the invention should be covered in the scope of protection of the invention.
Claims (5)
1. The utility model provides a five-stage forklift lifting system, includes one-stage portal (1), its characterized in that: a first abdicating port (11) is formed in the top surface of the primary door frame (1), a secondary door frame (2) which is parallel to the primary door frame (1) is connected to the inner side of the primary door frame (1) in a sliding mode, and the secondary door frame (2) can slide along the length direction of the primary door frame (1);
A second abdicating port (21) is formed in the top surface of the secondary door frame (2), a tertiary door frame (3) which is parallel to the secondary door frame (2) is connected to the inner side of the secondary door frame (2) in a sliding mode, and the tertiary door frame (3) can slide along the length direction of the secondary door frame (2);
A third abdicating port (31) is formed in the top surface of the three-stage door frame (3), a four-stage door frame (4) which is parallel to the three-stage door frame (3) is connected to the inner side of the three-stage door frame (3) in a sliding mode, and the four-stage door frame (4) can slide along the length direction of the three-stage door frame (3);
A fourth abdicating port (41) is formed in the top surface of the four-stage door frame (4), a five-stage door frame (5) which is parallel to the four-stage door frame (4) is connected to the inner side of the four-stage door frame (4) in a sliding mode, and the five-stage door frame (5) can slide along the length direction of the four-stage door frame (4);
One side of the five-stage portal (5) is slidably connected with a fork frame (6), the fork can slide along the length direction of the five-stage portal (5), and the bottom of one side of the fork frame (6) far away from the five-stage portal (5) is fixedly connected with a fork body (61);
the outer side wall of the secondary portal frame (2) is rotationally connected with a second outer roller (24), a first inner chute (12) arranged along the length direction of the primary portal frame (1) is arranged at the position of the inner side wall of the primary portal frame (1) corresponding to the second outer roller (24), and the second outer roller (24) is slidably connected in the first inner chute (12);
A third outer roller (34) is rotationally connected to the outer side wall of the three-stage portal (3), a second inner chute (22) arranged along the length direction of the two-stage portal (2) is formed in the position, corresponding to the third outer roller (34), of the inner side wall of the two-stage portal (2), and the third outer roller (34) is slidably connected in the second inner chute (22);
a fourth outer roller (44) is rotationally connected to the outer side wall of the four-stage portal (4), a third inner chute (32) arranged along the length direction of the three-stage portal (3) is formed in the position, corresponding to the fourth outer roller (44), of the inner side wall of the three-stage portal (3), and the fourth outer roller (44) is slidably connected to the third inner chute (32);
A fifth outer roller (54) is rotationally connected to the outer side wall of the fifth-stage portal (5), a fourth inner chute (42) arranged along the length direction of the fourth-stage portal (4) is formed in the position, corresponding to the fifth outer roller (54), of the inner side wall of the fourth-stage portal (4), and the fifth outer roller (54) is slidably connected in the fourth inner chute (42);
A fork frame roller (62) is rotationally connected at a position of the fork frame (6) corresponding to the inner side of the five-stage portal frame (5), a fifth inner chute (52) arranged along the length direction of the five-stage portal frame (5) is arranged at a position of the inner side wall of the five-stage portal frame (5) corresponding to the fork frame roller (62), and the fork frame roller (62) is slidingly connected in the fifth inner chute (52);
The inner side wall of the primary portal (1) is rotationally connected with a first inner roller (13), a second outer chute (25) arranged along the length direction of the secondary portal (2) is formed in the position of the outer side wall of the secondary portal (2) corresponding to the first inner roller (13), and the first inner roller (13) is slidably connected in the second outer chute (25);
The inner side wall of the secondary portal (2) is rotationally connected with a second inner roller (23), a third outer chute (35) arranged along the length direction of the tertiary portal (3) is formed in the position of the outer side wall of the tertiary portal (3) corresponding to the second inner roller (23), and the second inner roller (23) is slidably connected in the third outer chute (35);
The inner side wall of the three-stage portal frame (3) is rotationally connected with a third inner roller (33), a fourth outer chute (45) arranged along the length direction of the four-stage portal frame (4) is formed in the position of the outer side wall of the four-stage portal frame (4) corresponding to the third inner roller (33), and the third inner roller (33) is slidably connected in the fourth outer chute (45);
the inner side wall of the fourth-stage portal frame (4) is rotationally connected with a fourth inner roller (43), a fifth outer chute (55) arranged along the length direction of the fifth-stage portal frame (5) is formed in the position, corresponding to the fourth inner roller (43), of the outer side wall of the fifth-stage portal frame (5), and the fourth inner roller (43) is slidably connected in the fifth outer chute (55);
The primary portal (1) is fixedly connected with a cylinder body of a primary hydraulic cylinder (14), a piston rod of the primary hydraulic cylinder (14) is arranged along the length direction of the primary portal (1), and the secondary portal (2) is fixedly connected with the end part of the piston rod of the primary hydraulic cylinder (14);
The cylinder body of the three-stage oil hydraulic cylinder (36) is fixedly connected to the three-stage portal (3), a piston rod of the three-stage oil hydraulic cylinder (36) is arranged along the length direction of the three-stage portal (3), and the four-stage portal (4) is fixedly connected to the end part of the piston rod of the three-stage oil hydraulic cylinder (36);
The five-stage portal (5) is fixedly connected with a cylinder body of a five-stage oil hydraulic cylinder (56), a piston rod of the five-stage oil hydraulic cylinder (56) is arranged along the length direction of the five-stage portal (5), and the end part of the piston rod of the five-stage oil hydraulic cylinder (56) is fixedly connected with the fork frame (6);
A first oil delivery pipe (71) is fixedly connected between the cylinder bodies of the first-stage oil hydraulic cylinders (14), a main oil inlet pipe (7) is fixedly connected to the middle part of the first oil delivery pipe (71), an oil inlet hole for connecting an oil supply device is formed in the middle part of the main oil inlet pipe (7), and a first speed limiting valve (711) is arranged on the main oil inlet pipe (7);
A third oil conveying pipe (73) is fixedly connected between the cylinder bodies of the two three-stage oil hydraulic cylinders (36), a third speed limiting valve (731) is arranged in the middle of the third oil conveying pipe (73), and one end, far away from the third oil conveying pipe (73), of the third speed limiting valve (731) is fixedly connected with one end, far away from the first oil conveying pipe (71), of the main oil inlet pipe (7);
A fifth oil delivery pipe (74) is connected to the third oil delivery pipe (73), and one end, far away from the third oil delivery pipe (73), of the fifth oil delivery pipe (74) is fixedly connected with a cylinder body of the five-stage oil hydraulic cylinder (56);
The main oil inlet pipe (7) and the fifth oil delivery pipe (74) are hoses;
The top of the two-stage portal frame (2) is rotationally connected with a second oil delivery wheel (712), the central axis of the second oil delivery wheel (712) is perpendicular to the length direction of the two-stage portal frame (2), the main oil inlet pipe (7) is arranged by bypassing the second oil delivery wheel (712) from the top, the top of the four-stage portal frame (4) is rotationally connected with a fourth oil delivery wheel (732), the central axis of the fourth oil delivery wheel (732) is perpendicular to the length direction of the four-stage portal frame (4), and the fifth oil delivery pipe (74) is arranged by bypassing the fourth oil delivery wheel (732) from the top.
2. The five-stage forklift lifting system of claim 1, wherein: the two sides of the top of the secondary portal (2) are respectively and rotatably connected with a second chain wheel (26), the central axes of the second chain wheels (26) are respectively and vertically arranged in the length direction of the secondary portal (2), second chains (27) are respectively and vertically arranged on the second chain wheels (26), one ends of the second chains (27) are respectively and fixedly connected with the top of the primary portal (1), and the other ends of the second chains (27) are respectively and fixedly connected with the bottom of the tertiary portal (3);
The four-stage portal (4) is characterized in that four chain wheels (46) are rotatably connected to two sides of the top of the four-stage portal (4), the central axes of the four chain wheels (46) are perpendicular to the length direction of the four-stage portal (4), four chains (47) are respectively arranged on the four chain wheels (46), one ends of the two fourth chains (47) are fixedly connected to the top of the three-stage portal (3), and the other ends of the two fourth chains are fixedly connected to the bottom of the five-stage portal (5).
3. The five-stage forklift lifting system of claim 1, wherein: a first relief valve (72) is arranged at a position of the first oil delivery pipe (71) close to the primary oil hydraulic cylinder (14).
4. A method for using a five-stage forklift lifting system for controlling the five-stage forklift lifting system according to claim 1, which is characterized in that:
S1, connecting a main oil inlet pipe (7) and an oil supply device;
s2, lifting to supply oil to the main oil inlet pipe (7);
S3, recovering and extracting oil in the total oil inlet pipe (7).
5. The method for using the five-stage forklift lifting system according to claim 4, wherein the method comprises the following steps: the working pressures of the primary hydraulic cylinder (14), the tertiary hydraulic cylinder (36) and the five-stage hydraulic cylinder (56) are ordered to be the magnitude of the primary hydraulic cylinder (14) > the tertiary hydraulic cylinder (36) > the five-stage hydraulic cylinder (56).
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| CN111704081A (en) * | 2020-05-25 | 2020-09-25 | 安徽合力股份有限公司 | Five-stage full-free portal frame |
| CN212246112U (en) * | 2020-06-20 | 2020-12-29 | 杭州叉车门架有限公司 | Five-stage forklift lifting system |
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| KR200331404Y1 (en) * | 2003-07-09 | 2003-10-30 | 한라씨녹스 주식회사 | Electric forklift truck with three mast |
| US7823698B2 (en) * | 2007-08-01 | 2010-11-02 | Wiggins Light Co., Inc. | Three stage mast |
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| US8777545B2 (en) * | 2009-10-20 | 2014-07-15 | Bright Coop, Inc. | Free lift mast for truck mounted forklift |
| CN101973499B (en) * | 2010-11-01 | 2013-01-30 | 安徽合力股份有限公司 | Forklift gantry |
| CN104129738B (en) * | 2014-07-30 | 2016-08-17 | 安徽合力股份有限公司 | The full free gantry assembly of fork truck three grades |
| US11046564B2 (en) * | 2015-11-09 | 2021-06-29 | Crown Equipment Corporation | Order picker materials handling vehicle with improved downward visibility when driving elevated |
| CN108529504B (en) * | 2018-05-31 | 2023-08-04 | 安徽合力股份有限公司 | Multistage lifting forklift mast assembly |
| CN110734008A (en) * | 2019-11-19 | 2020-01-31 | 皇珈叉车(苏州)有限公司 | Four-stage rack with kinds of wide visual field |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111704081A (en) * | 2020-05-25 | 2020-09-25 | 安徽合力股份有限公司 | Five-stage full-free portal frame |
| CN212246112U (en) * | 2020-06-20 | 2020-12-29 | 杭州叉车门架有限公司 | Five-stage forklift lifting system |
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