A reach stacker and engineering machine

Abstract

The application discloses a stacking gantry and engineering machinery. The stacking gantry comprises an inner gantry and an outer gantry, an outer column of the outer gantry is sleeved outside an inner column of the inner gantry, and the outer column and the inner column are both made of seamless steel pipes. In the stacking gantry, the inner and outer gantries are made of seamless steel pipes, so that the gantry structure can be simplified, the manufacturing cost can be reduced, the gantry strength can be improved, the rollers can be cancelled, and the rollers can be prevented from being damaged to affect the operation efficiency.

Description

Technical Field

[0001] This invention relates to the field of engineering machinery technology, and in particular to a stacking gantry and an engineering machine equipped with the stacking gantry. Background Technology

[0002] Forklifts are suitable for stacking operations in narrow aisles and confined spaces, making them ideal equipment for palletized loading and unloading in high-bay warehouses and workshops. They mainly consist of the vehicle body and a lifting device. The lifting device primarily uses a motor to drive a hydraulic station to push hydraulic cylinders, controlling the extension and retraction of the inner and outer masts (or stacking masts), thereby lifting and lowering goods via a lifting device.

[0003] Forklifts are industrial material handling vehicles, referring to various wheeled handling vehicles used for loading, unloading, stacking, and short-distance transportation of palletized goods. They mainly consist of the vehicle body and a lifting mechanism. The lifting mechanism primarily uses an electric motor to drive a hydraulic cylinder, which in turn controls the extension and retraction of the inner and outer masts (or stacking masts), thereby raising and lowering the goods via the forks.

[0004] Currently, when the inner and outer masts of forklifts and stackers move vertically relative to each other to extend, retract, and raise the masts vertically, the wheel axle structures on both sides of the inner mast roll on the tracks on both sides of the outer mast, or vice versa. Because both the left and right uprights of the inner and outer masts have wheel axle track structures, their cross-sectional shapes are relatively complex. Therefore, the left and right uprights of both the inner and outer masts are generally made of cast steel sections or welded from steel plates.

[0005] It is evident that the existing stacking gantry technology has the following disadvantages:

[0006] 1) The gantry track needs to be welded and machined, the gantry structure is complex, and the manufacturing cost is high;

[0007] 2) When the rollers in the wheel and axle structure work with the gantry rail, the contact area between the rollers and the rail is small and the contact stress is large, which can easily lead to damage to the gantry and affect the work efficiency. Summary of the Invention

[0008] In view of this, the purpose of the present invention is to provide a stacking gantry and an engineering machine equipped with the stacking gantry, which uses seamless steel tubes to form the inner and outer gantry, which can simplify the gantry structure, reduce manufacturing costs, improve the strength of the gantry, eliminate rollers, and avoid roller damage affecting work efficiency.

[0009] To achieve the above objectives, the present invention provides the following technical solution:

[0010] A stacking gantry includes an inner gantry and an outer gantry, wherein the outer column of the outer gantry is fitted over the inner column of the inner gantry, and both the outer column and the inner column are made of seamless steel pipe.

[0011] Optionally, in the above-mentioned stacking gantry, the outer contour of the cross-section of the inner column is a first circle;

[0012] The outer column comprises a first column segment and a second column segment along the axial direction from top to bottom. The inner contour of the cross-section of the first column segment is a second circle, and the inner contour of the cross-section of the second column segment is an open arc shape. The radius of the open arc shape is equal to that of the second circle, and both are larger than the radius of the first circle.

[0013] Optionally, in the above-mentioned stacking gantry, the inner gantry further includes an inner column connecting beam:

[0014] The inner columns include a first inner column and a second inner column arranged in parallel, and one or more inner column connecting beams are provided between the first inner column and the second inner column.

[0015] The connection between the inner column connecting beam and the first inner column is located within the opening of the second column segment of the outer column, which is sleeved outside the first inner column.

[0016] The connection between the inner column connecting beam and the second inner column is located within the opening of the second column segment of the outer column, which is fitted over the second inner column.

[0017] Optionally, in the above-mentioned stacking gantry, the outer gantry includes a first outer column, a second outer column, and an outer column connecting beam:

[0018] The first outer column is fitted outside the first inner column;

[0019] The second outer column is fitted over the second inner column;

[0020] The top ends of both the first and second outer columns are connected to the outer column connecting beam.

[0021] Optionally, in the above-mentioned stacking gantry, one end of the inner column connecting beam is connected to the first inner column through a first ear plate, and the first ear plate is located in the opening of the second column segment of the outer column;

[0022] The other end of the inner column connecting beam is connected to the second inner column via a second ear plate, and the second ear plate is located inside the opening of the second column segment of the outer column.

[0023] Optionally, the above-mentioned stacking gantry also includes:

[0024] The lifting device is slidably connected to the outer column;

[0025] A lifting assembly is used to control the lifting device to move up and down relative to the outer column.

[0026] Optionally, in the above-mentioned stacking gantry, the inner column includes a lifting cylinder structure, which includes a column and a rod arranged coaxially. The rod can extend out of the top of the column along the axial direction of the column and can retract into the column.

[0027] Optionally, in the above-mentioned stacking gantry, the lifting assembly includes:

[0028] A wheel and axle structure is installed on the outer column connecting beam;

[0029] The flexible component is connected at one end to the inner gantry and at the other end to the lifting device after passing around the wheel axle structure.

[0030] Optionally, in the above-mentioned stacking gantry, the spreading device includes a spreading device body and a sliding claw fixedly connected to the spreading device body;

[0031] The sliding claw is sleeved on the outside of the outer column and can slide back and forth along the axial direction of the outer column.

[0032] Optionally, in the above-mentioned stacking gantry, an inner slider is provided between the outer column and the inner column.

[0033] An engineering machine equipped with the stacking gantry described above.

[0034] Optionally, the aforementioned construction machinery also includes a chassis and a swing cylinder;

[0035] One end of the swing cylinder is hinged to the chassis, and the other end is hinged to the inner or outer gantry of the stacking gantry.

[0036] Optionally, the construction machinery is a forklift or stacker.

[0037] As can be seen from the above technical solution, the stacking gantry and the engineering machinery equipped with the stacking gantry provided by the present invention use seamless steel pipes to make the inner and outer gantry frames. Compared with the cast and welded gantry frames in the prior art, the gantry structure and manufacturing process are simplified, which helps to reduce production costs. Moreover, since the seamless steel pipe is a one-piece structure without splicing welds or other connecting structures, the gantry can have higher mechanical strength and rigidity and other excellent properties, eliminating the need for rollers and avoiding the impact of roller damage on operating efficiency. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 A schematic diagram of the overall structure of an engineering machinery equipped with a stacking gantry provided in an embodiment of the present invention;

[0040] Figure 2 for Figure 1 The side view of the engineering machinery shown;

[0041] Figure 3 A schematic diagram of the structure of the inner mast in the stacking mast provided in an embodiment of the present invention when the inner mast is in a retracted state;

[0042] Figure 4 A schematic diagram of the structure of the stacking gantry provided in an embodiment of the present invention when the inner gantry is in the extended state;

[0043] Figure 5 This is a schematic diagram of the structure of the outer gantry in the stacking gantry provided in an embodiment of the present invention;

[0044] Figure 6 This is a schematic diagram of the lifting device in the stacking gantry provided in an embodiment of the present invention.

[0045] in:

[0046] 1-Inner mast, 2-Outer mast, 3-Lifting device, 4-Wheel and axle structure, 5-Chassis, 6-Swing cylinder

[0047] 7-Flexible component, 8-Fastening joint, 9-Inner slider

[0048] 101 - Inner column, 102 - Inner column connecting beam

[0049] 103 - First ear plate, 104 - Second ear plate, 105 - Third ear plate, 106 - Fourth ear plate

[0050] 111 - First inner column, 112 - Second inner column

[0051] 114-rod body,

[0052] 201 - External column, 202 - External column connecting beam

[0053] 211 - First outer column, 212 - Second outer column

[0054] 301-Lifting device body, 302-Lifting device mounting bracket, 303-Sliding claw, 331-Arc-shaped slider.

[0055] 401-Wheel and Axle Mounting Bracket

[0056] 901 - First inner slider, 902 - Second inner slider. Detailed Implementation

[0057] This invention discloses a stacking gantry and an engineering machine equipped with the stacking gantry. The inner and outer gantry are made of seamless steel tubes, which can simplify the gantry structure, reduce manufacturing costs, improve the strength of the gantry, eliminate rollers, and avoid roller damage affecting work efficiency.

[0058] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0059] Please see Figures 1 to 6 The stacking gantry provided in this embodiment of the invention includes an inner gantry 1 and an outer gantry 2. The outer column 201 of the outer gantry 2 is sleeved outside the inner column 101 of the inner gantry 1. Both the outer column 201 and the inner column 101 are made of seamless steel pipes.

[0060] In this article, seamless steel pipe refers to a steel pipe formed by piercing a single round steel bar, with no weld seams on its surface and no joints along its cross-section. The materials used for seamless steel pipes include ordinary and high-quality carbon structural steel Q215-A to Q275-A and No. 10 to 50 steel, low-alloy steel 09MnV, 16Mn, etc., alloy steel, stainless acid-resistant steel, etc. Furthermore, according to the production method, seamless steel pipes can be classified as hot-rolled seamless steel pipes, cold-rolled seamless steel pipes, cold-drawn seamless steel pipes, extruded seamless steel pipes, and jacking pipes. According to the cross-sectional shape, the cross-section of seamless steel pipes can be circular or other shapes, such as square, elliptical, triangular, hexagonal, seed-shaped, star-shaped, finned, etc., or others.

[0061] As can be seen, the stacking gantry provided in this embodiment of the invention uses seamless steel pipes to form the inner and outer gantry frames. Compared with the cast and welded gantry frames in the prior art, the gantry frame structure and manufacturing process are simplified, thereby helping to reduce production costs. Moreover, since the seamless steel pipe is a one-piece structure without splicing welds or other connecting structures, the gantry frame can have higher mechanical strength and rigidity, and rollers can be eliminated, avoiding the impact of roller damage on work efficiency.

[0062] In specific implementation, in this stacking gantry, the outer contour of the cross-section of the inner column 101 is a first circle; the inner contour of the cross-section of the outer column 201 is a second circle, the radius of which is larger than the radius of the first circle. This ensures that the outer column 201 can be smoothly fitted onto the inner column, allowing the stacking gantry to freely extend, retract, and rise.

[0063] Preferably, in this stacking gantry, the outer contour of the cross-section of the inner column 101 is a first circle; the outer column 201 includes a first column segment and a second column segment along the axial direction from top to bottom. The inner contour of the cross-section of the first column segment is a second circle, and the inner contour of the cross-section of the second column segment is an open arc shape. The radius of the open arc shape is equal to that of the second circle, and both are larger than the radius of the first circle. This ensures that the outer column 201 can be smoothly fitted onto the outer column, allowing the stacking gantry to freely extend, retract, and rise.

[0064] Furthermore, the inner portal frame 1 also includes an inner column connecting beam 102. Wherein:

[0065] The inner column 101 includes a first inner column 111 and a second inner column 112 arranged in parallel. One or more inner column connecting beams 102 are provided between the first inner column 111 and the second inner column 112. The inner column connecting beams 102 can ensure that the inner frame 1 has high structural strength.

[0066] The connection between the inner column connecting beam 102 and the first inner column 111 is located at the outer column 201 (i.e., the one fitted outside the first inner column 111). Figure 5 Inside the opening of the second column segment of the first outer column 211 shown;

[0067] The connection between the inner column connecting beam 102 and the second inner column 112 is located at the outer column 201 (i.e., the one fitted outside the second inner column 112). Figure 5 The second column segment of the second outer column 212 shown in the figure is inside the opening.

[0068] Correspondingly, the outer gantry 2 includes a first outer column 211, a second outer column 212, and an outer column connecting beam 202. Specifically: the first outer column 211 and the second outer column 212 are arranged in parallel; the first outer column 211 is fitted outside the first inner column 111; the second outer column 212 is fitted outside the second inner column 112; the tops of both the first outer column 211 and the second outer column 212 are connected to the outer column connecting beam 202, thereby ensuring that the outer gantry 2 has high structural strength.

[0069] For specific implementation details, please refer to [link / reference]. Figure 1 , Figure 3 and Figure 4One end of the inner column connecting beam 102 can be connected to the first inner column 111 via a first ear plate 103, which is located within the opening of the second column segment of the first outer column 211. The other end of the inner column connecting beam 102 is connected to the second inner column 112 via a second ear plate 104, which is located within the opening of the second column segment of the second outer column 212. Thus, both the first ear plate 103 and the second ear plate 104 can avoid the outer column 201, allowing the inner and outer columns to fully retract.

[0070] The specific positions of the first ear plate 103 and the second ear plate 104 can be respectively set on the side of the first inner column 111 and the second inner column 112 away from the lifting device 3, such as... Figure 1 As shown in the diagram. Alternatively, in other specific embodiments, the first ear plate 103 may be disposed on the inner side of the first inner pillar 111 (i.e., the side closer to the second inner pillar 112), and the second ear plate 104 may be disposed on the inner side of the second inner pillar 112 (i.e., the side closer to the first inner pillar 111); moreover, the first ear plate 103 may be disposed on the outer side of the first inner pillar 111 (i.e., the side away from the second inner pillar 112), and the second ear plate 104 may be disposed on the outer side of the second inner pillar 112 (i.e., the side away from the first inner pillar 111). Alternatively, the first ear plate 103 may be disposed at any other position on the first inner pillar 111, and the second ear plate 104 may be disposed at any other position on the second inner pillar 112, each position having its own advantages.

[0071] Preferably, the plane of the first ear plate 103 is coplanar with the center plane of the first inner column 111 and also with the center plane of the first outer column 211; the plane of the second ear plate 104 is coplanar with the center plane of the second inner column 112 and also with the center plane of the second outer column 212. However, it is not limited to this. The first ear plate 103 and the second ear plate 104 can also be slightly inclined relative to the center plane of the above-mentioned columns, which can also achieve the function of strengthening the gantry. In this case, it is only necessary to ensure that the first ear plate 103, the second ear plate 104 and the inner column connecting beam 102 can avoid it when the outer gantry is raised or lowered.

[0072] Furthermore, a bottom connecting beam (not shown in the figure) can be provided between the bottom ends of the first outer column 211 and the second outer column 212. This bottom connecting beam is similar to... Figure 1 The outer column connecting beam 202 is fixedly connected at both ends to the first outer column 211 and the second outer column 212, respectively, and is mainly used to strengthen and shape the outer gantry 2. Moreover, in order to avoid interference with the inner gantry 1, the bottom connecting beam is provided with clearance slots to avoid the various ear plates on the inner gantry 1.

[0073] In practice, the stacking gantry also includes a spreading device 3 and a lifting assembly. The spreading device 3 is slidably connected to the outer column 201 and can reciprocate along the axial direction of the outer column. The lifting assembly is mounted on the gantry and is used to control the lifting of the spreading device 3 relative to the outer column 201. During operation, the lifting of the spreading device 3 is controlled by the lifting assembly to achieve the stacking operation.

[0074] Specifically, the inner column 101 is equipped with a lifting cylinder structure. Please refer to [link / reference]. Figure 4 The lifting cylinder structure includes a column and a rod 114 arranged coaxially. The rod 114 can extend out of the top of the column along the axial direction of the column and can retract into the column.

[0075] In a specific implementation, a lifting cylinder can be used as the inner column 101, fitted inside the outer column 201. The outer end of the cylinder's telescopic rod is connected to the outer gantry, thereby controlling the lifting and lowering of the outer gantry 2. Alternatively, in other specific embodiments, a lifting cylinder can be coaxially fixed to the top of the inner column. Both the inner column and the lifting cylinder are fitted inside the outer column 201. The cylinder body is fixed to the inner column, and the outer end of the cylinder's telescopic rod is connected to the outer gantry, thereby also controlling the lifting and lowering of the outer gantry 2.

[0076] In the preferred embodiment, please refer to Figure 1 , Figure 2 and Figure 5 The aforementioned lifting assembly includes an axle structure 4 and a flexible component 7. Specifically, the axle structure 4 is mounted on the outer column connecting beam 202; one end of the flexible component 7 is connected to the inner gantry 1, and the other end passes around the axle structure 4 and is connected to the lifting device 3.

[0077] Specifically, please see Figure 5 The outer column connecting beam 202 is provided with a wheel axle mounting bracket 401 for mounting the wheel axle structure 4.

[0078] Preferably, the stacking gantry is provided with two sets of lifting components, namely two sets of wheel and axle mounting brackets 401, two sets of wheel and axle structures 4 and two sets of flexible parts 7 arranged side by side, so as to ensure that the lifting device 3 can be raised and lowered smoothly without tilting.

[0079] For specific implementation details, please refer to [link / reference]. Figure 1 One end of the flexible component 7 is connected to the inner column connecting beam 102 of the inner gantry 1 via a fastening joint 8, and the other end is locked to the lifting device 3 after passing around the wheel axle structure 4. The inner column connecting beam 102 connected to the flexible component 7 is generally... Figure 3 and Figure 4The inner column connecting beam 102 shown is fixed to the top of the inner column 101. Furthermore, to facilitate the connection of the flexible member 7, the inner column connecting beam 102 is preferably a plate-like structure (the inner column connecting beams 102 in other locations can be either round rods or plate-like structures). Alternatively, in other specific embodiments, the inner column connecting beam 102 can also be a connecting beam structure with other cross-sectional shapes.

[0080] Specifically, the inner column connecting beam 102 for installing the flexible component 7 is provided with mounting holes. When installing the flexible component 7, a locking connection between the flexible component 7 and the inner column connecting beam 102 can be achieved through a fastening joint 8 that can be fixedly connected to both the mounting holes on the inner column connecting beam 102 and the flexible component 7 itself; alternatively, the flexible component 7 can pass through the mounting holes on the inner column connecting beam 102 and be connected to a pin-shaped component, then locked in place by the fastening joint, thereby achieving a locking connection between the flexible component 7 and the inner column connecting beam 102. There are various implementation schemes for the specific connection method of the flexible component 7, and those skilled in the art can implement them according to actual needs; this invention does not impose specific limitations on this.

[0081] In specific implementation, the flexible component 7 is preferably a chain, in which case the wheel and axle structure 4 is a sprocket; or, the flexible component 7 can also be a wire rope, in which case the wheel and axle structure 4 can be an ordinary pulley.

[0082] In addition, other lifting mechanisms can be used as the lifting components described above to achieve the lifting of the spreader. For example, the wheel axle structure 4 can be replaced with a winch, and the lifting of the spreader 3 along the outer gantry 2 can be controlled by the winch winding / unwinding the flexible element 7.

[0083] For specific implementation details, please refer to [link / reference]. Figure 1 , Figure 2 and Figure 6 The lifting device 3 in the stacking gantry includes a lifting device body 301, and a sliding claw 303 is fixedly connected to one side of the lifting device body 301. The sliding claw 303 is sleeved on the outside of the outer column 201 and can slide back and forth along the axial direction of the outer column 201.

[0084] It should be noted that the opening of the sliding claw 303 is aligned with the side opening of the second column segment of the outer column 201. Thus, when the outer column rises and falls along the inner column, and when the sliding claw 303 rises and falls along the outer column, the sliding claw 303 in the lifting device 3 can smoothly avoid the inner column connecting beam 102 of the inner gantry 1 and the ear plates connected to its two ends.

[0085] Specifically, please see Figure 1 and Figure 6The lifting device 3 has two sets of sliding claws 303 on the side near the gantry, and the two sets of sliding claws 303 are respectively sleeved on the first outer column 211 and the second outer column 212. Each set of sliding claws 303 may contain only one sliding claw 303 or multiple sliding claws 303 arranged coaxially.

[0086] In practice, each sliding claw 303 is an arc-shaped tubular structure, which can be made of steel pipe. An arc-shaped slider 331 is fixedly installed on its inner side to ensure that the lifting device 3 can smoothly rise and fall along the outer column.

[0087] Preferably, multiple sliding claws 303 are fixed on a lifting device mounting frame 302, which is fixedly connected to the lifting device body 301.

[0088] Specifically, an inner slider is provided between each outer column 201 and its inner column 101. Please refer to [link / reference]. Figure 3 and Figure 4 The inner slider includes a first inner slider 901 fixed to the outer wall of the top end of the inner column 101, and a second inner slider 902 fixed to the inner wall of the bottom end of the outer column 201. However, it is not limited to this. In other specific embodiments, the inner slider can also be provided at other positions between the outer column 201 and the inner column 101, as long as a sliding fit can be achieved between the outer column 201 and the inner column 101. Preferably, the inner slider is an annular slider.

[0089] In specific implementation, the material of the inner slider set between the outer column 201 and the inner column 101 can be stainless steel, low carbon steel, or other alloy materials or composite materials that can play the role of sliders.

[0090] In a specific embodiment, the stacking gantry is also equipped with a proximity switch to detect the height of the lifting device 3 / outer gantry 2. Alternatively, in other specific embodiments, other height detection methods can be used instead of the proximity switch.

[0091] In addition, in other specific embodiments, elastic components such as airbags or springs can be used instead of the above-mentioned lifting cylinder structure.

[0092] In summary, this invention also provides an engineering machine equipped with the stacking gantry described above.

[0093] Please see Figure 1 and Figure 2 The engineering machinery also includes a chassis 5 and a swing cylinder 6. One end of the swing cylinder 6 is hinged to the chassis 5, and the other end is hinged to the inner gantry 1 or the outer gantry 2 in the stacking gantry. Thus, by controlling the extension and retraction of the swing cylinder 6, the forward tilting and backward tilting of the gantry can be controlled.

[0094] Specifically, please see Figure 2 , Figure 3 and Figure 4 One end of the swing cylinder 6 is hinged to the gantry via a third ear plate 105, and the other end is hinged to the chassis 5 via a fourth ear plate 106. Both the third ear plate 105 and the fourth ear plate 106 have hinge holes. Furthermore, the third ear plate 105 and the first ear plate 103 on the first inner column 111 are located in the same plane and are both located within the opening of the second column section of the first outer column 211, so as to avoid collision when the first outer column 211 extends or retracts relative to the first inner column 111; similarly, the third ear plate 105 and the second ear plate 104 on the second inner column 112 are located in the same plane and are both located within the opening of the second column section of the second outer column 212, so as to avoid collision when the second outer column 212 extends or retracts relative to the second inner column 112.

[0095] Specifically, the construction machinery can be a forklift or a stacker.

[0096] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0097] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0098] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A stacking gantry, characterized in that, It includes an inner frame (1) and an outer frame (2), wherein the outer column (201) of the outer frame (2) is sleeved outside the inner column (101) of the inner frame (1), and both the outer column (201) and the inner column (101) are made of seamless steel pipe; The seamless steel pipe is made by piercing a whole round steel bar, with no weld seam on the surface and no joint along the perimeter of the cross-section. The outer contour of the cross-section of the inner column (101) is a first circle; The outer column (201) includes a first column segment and a second column segment along the axial direction from top to bottom. The inner contour of the cross-section of the first column segment is a second circle, and the inner contour of the cross-section of the second column segment is an open arc shape. The radius of the open arc shape is equal to that of the second circle, and both are larger than the radius of the first circle. The inner gantry (1) also includes an inner column connecting beam (102): The inner column (101) includes a first inner column (111) and a second inner column (112) arranged in parallel; both the first inner column (111) and the second inner column (112) include a lifting cylinder structure, the lifting cylinder structure includes a column body and a rod body (114) arranged coaxially, the rod body (114) can extend out of the top of the column body along the column body axis and can retract into the column body, and one or more inner column connecting beams (102) are provided between the column body of the first inner column (111) and the column body of the second inner column (112). One end of the inner column connecting beam (102) is connected to the column body of the first inner column (111) through the first ear plate (103). The first ear plate (103) is a vertical panel located in the opening of the second column segment of the outer column (201) sleeved outside the first inner column (111). The other end of the inner column connecting beam (102) is connected to the column body of the second inner column (112) through the second ear plate (104). The second ear plate (104) is a vertical panel located in the opening of the second column segment of the outer column (201) sleeved outside the second inner column (112). The stacking gantry also includes: The lifting device (3) is slidably connected to the outer column (201); the lifting device (3) includes a lifting device body (301) and a sliding claw (303) fixedly connected to the lifting device body (301); the sliding claw (303) is an arc-shaped tubular structure, and an arc-shaped slider (331) is fixedly provided on its inner side; the sliding claw (303) is sleeved on the outer side of the outer column (201) and can slide back and forth along the axial direction of the outer column (201); A lifting assembly is used to control the lifting device (3) to rise and fall relative to the outer column (201).

2. The stacking gantry according to claim 1, characterized in that, The outer gantry (2) includes a first outer column (211), a second outer column (212), and an outer column connecting beam (202): The first outer column (211) is fitted outside the first inner column (111); The second outer column (212) is fitted over the second inner column (112); The top ends of the first outer column (211) and the second outer column (212) are both connected to the outer column connecting beam (202).

3. The stacking gantry according to claim 2, characterized in that, The lifting component includes: A wheel and axle structure (4) is installed on the outer column connecting beam (202); The flexible component (7) is connected at one end to the inner gantry (1) and at the other end to the lifting device (3) after passing around the wheel axle structure (4).

4. The stacking gantry according to claim 1, characterized in that, An inner slider is provided between the outer column (201) and the inner column (101).

5. An engineering machinery, characterized in that, The stacking gantry is provided as described in any one of claims 1 to 4.

6. The engineering machinery according to claim 5, characterized in that, It also includes a chassis (5) and a swing cylinder (6); One end of the swing cylinder (6) is hinged to the chassis (5), and the other end is hinged to the inner gantry (1) or the outer gantry (2) in the stacking gantry.

7. The engineering machinery according to claim 6, characterized in that, The engineering machinery mentioned is a forklift or stacker.

Images