Gantry and its industrial handling vehicles

Abstract

This invention discloses a mast, comprising an outer mast vertically mounted on a vehicle frame, a height-adjustable middle mast embedded within the outer mast, and a height-adjustable inner mast embedded within the middle mast. Both the outer and middle masts are rectangular frame box structures, and both have reinforcing structures in the lateral and longitudinal directions to increase their strength and rigidity. This invention employs a narrow-body mast design, and the outer mast utilizes a trapezoidal crossbeam structure, ensuring that the driver's field of vision approximately coincides with the two sides of the trapezoidal crossbeam, reducing obstruction at the corners of the crossbeam and effectively improving the lateral field of vision of the mast. Furthermore, the upper and lower crossbeams of the outer and middle masts are connected by cladding plates to form an integrated frame box structure, enhancing the longitudinal and lateral rigidity of the mast and improving its stability when stacked in a raised position.

Description

Technical Field

[0001] This invention relates to the field of forklift mast equipment technology, specifically a mast and its industrial handling vehicle. Background Technology

[0002] Chinese Patent Publication No. CN216687359U discloses a mast structure for a forklift, including an outer mast, a middle mast, and an inner mast. The outer mast is fitted over the middle mast, and the middle mast slides vertically along the outer mast. The middle mast is fitted over the inner mast, and the inner mast slides vertically along the middle mast. The structure also includes a fixed pulley, a steel belt, and a drive source for driving the middle mast to move vertically. The fixed pulley is rotatably mounted on the middle mast. One end of the steel belt is fixedly connected to the outer mast, and the other end of the steel belt passes over the fixed pulley and is fixedly connected to the inner mast. The drive source is fixedly mounted on the outer mast. However, in actual use, the above-mentioned forklift mast still has the following drawbacks:

[0003] 1. Due to the large width of the outer mast and inner carriage, the mast will obstruct the driver's view on both sides when driving the vehicle and carrying out stacking operations, resulting in a large blind spot and making operation difficult.

[0004] 2. The above-mentioned gantry adopts a simple design with a single crossbeam and poor rigidity. When stacking high-level goods, the gantry sways significantly, resulting in poor stability and safety. Summary of the Invention

[0005] The purpose of this invention is to provide a gantry and its industrial handling vehicle to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A mast includes an outer mast vertically mounted on a vehicle frame, a middle mast that can be raised and lowered and embedded within the outer mast, and an inner mast that can be raised and lowered and embedded within the middle mast. The outer mast and the middle mast are both rectangular frame box structures, and the outer mast and the middle mast are provided with reinforcing structures in both the lateral and longitudinal directions to increase the strength and rigidity of the outer mast and the middle mast in the lateral and longitudinal directions.

[0008] Preferably, the outer gantry includes a set of parallel first columns in the longitudinal direction, and multiple sets of first beams are arranged between the first columns in the transverse direction. The cross-section of the first beam in plan view is an "isosceles trapezoid" structure. The upper and lower adjacent first beams are connected by a diagonal plate, and the diagonal plate is also connected to the first column on the corresponding side. The bending angle of the diagonal plate is the same as the angle of the trapezoidal first beam. The outer gantry is provided with a first longitudinal plate in the longitudinal direction, and the first longitudinal plate is connected to the center of each first beam.

[0009] Preferably, the first crossbeam is composed of a first horizontal plate and a first vertical plate in both horizontal and vertical states, or is composed of a single first horizontal plate in a horizontal state, with the two ends of the first horizontal plate and the first vertical plate respectively connected to the first column on the corresponding side.

[0010] Preferably, the middle gantry includes a set of parallel second columns in the longitudinal direction, and multiple sets of second crossbeams are arranged between the second columns in the transverse direction. The upper and lower adjacent second crossbeams are connected by a cover plate, and the cover plate is also connected to the second column on the corresponding side. The middle gantry is provided with double-layer second longitudinal plates in the longitudinal direction, and the second longitudinal plates are connected to the center of each second crossbeam. The double-layer second longitudinal plates are connected by a cross plate.

[0011] Preferably, the second crossbeam consists of a second horizontal plate and a second vertical plate in both horizontal and vertical states, or consists of a second vertical plate in a single vertical state, with the two ends of the second horizontal plate and the second vertical plate respectively connected to the second column on the corresponding side.

[0012] Preferably, the inner gantry includes a set of parallel third columns in the longitudinal direction, and multiple sets of third beams are arranged between the third columns in the transverse direction. The inner gantry has double-layered third longitudinal plates in the longitudinal direction, and the third longitudinal plates are connected to the center of each third beam. The double-layered third longitudinal plates are connected by transverse plates.

[0013] Preferably, the third crossbeam is composed of a horizontal and a vertical third horizontal plate and a third vertical plate, or a single vertical third vertical plate. The two ends of the third horizontal plate and the third vertical plate are respectively connected to the third column on the corresponding side, and the middle third vertical plate is set close to the third vertical plates at the upper and lower ends to increase the field of vision space.

[0014] Preferably, one end of the tie rod is connected to the upper end of the outer mast, and the other end of the tie rod is connected to the roof guard on the upper part of the vehicle frame.

[0015] Preferably, the inner mast is equipped with an inner slide that can be raised and lowered. The inner slide includes a set of vertically parallel guide rails, which are connected by connecting plates at their ends to form a cantilever structure, thereby increasing the driver's field of vision on both sides.

[0016] This application also provides an industrial handling vehicle, including the gantry described above.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. The present invention adopts a narrow-body gantry design, and the outer gantry uses a "ladder" shaped crossbeam structure, so that the driver's field of vision boundary is approximately coincident with the two sides of the "ladder" shaped crossbeam, reducing the obstruction of the two sides of the crossbeam and effectively improving the field of vision range on the left and right sides of the gantry.

[0019] 2. In this invention, the upper and lower crossbeams of the outer and middle gantry are connected by cladding plates to form an integral frame box structure. This integrated structure enhances the longitudinal and transverse rigidity of the gantry and improves its stability when stacked at a height. At the same time, the slanted cladding plates only require one bending process, and the bending angle is consistent with the angle of the crossbeam, resulting in good economic efficiency.

[0020] 3. In this invention, the left and right ends of the inner carriage adopt a cantilever structure, which is unobstructed and allows for effective observation of the fork status through the field of vision, thereby improving work efficiency and safety;

[0021] 4. In this invention, the upper ends of the vehicle frame and the mast are connected by a tie rod, which on the one hand enhances the overall rigidity of the mast, and on the other hand, the tie rod is fixed to the top of the roof guard, which helps to improve the visibility on the left and right sides of the vehicle and avoid obstruction. Attached Figure Description

[0022] Figure 1 This is a view of the gantry structure of the present invention;

[0023] Figure 2 This is a top view (sectional view) of the gantry of the present invention;

[0024] Figure 3 This is a front view of the outer gantry of the present invention;

[0025] Figure 4 This is a schematic diagram of the outer gantry structure of the present invention;

[0026] Figure 5 This is a front view of the middle gantry of the present invention;

[0027] Figure 6 This is a schematic diagram of the middle gantry structure of the present invention;

[0028] Figure 7 This is a front view of the inner gantry of the present invention;

[0029] Figure 8 This is a schematic diagram of the inner gantry structure of the present invention;

[0030] Figure 9 This is a schematic diagram of the human-mounted three-way stacking forklift structure of the present invention;

[0031] Figure 10 This is a schematic diagram of the simulated field of view of a three-way stacking forklift in the human-downward direction according to the present invention.

[0032] Figure 11 This is a schematic diagram of the simulated field of view of a human-mounted three-way stacking forklift in the frontal view state according to the present invention.

[0033] In the diagram: 1. Frame, 2. Outer mast, 21. First upright, 22. First crossbeam, 23. Diagonal wrap plate, 24. First longitudinal plate, 25. First transverse plate, 26. First upright plate, 3. Middle mast, 31. Second upright, 32. Second transverse beam, 33. Wrap plate, 34. Second longitudinal plate, 35. Second transverse plate, 36. Second upright plate, 4. Inner mast, 41. Third upright, 42. Third transverse beam, 43. Third longitudinal plate, 44. Third transverse plate, 45. Third upright plate, 5. Tie rod, 6. Top guard, 7. Inner slide, 71. Guide rail, 72. Connecting plate. Detailed Implementation

[0034] 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.

[0035] Please see Figure 1-11 The present invention provides a technical solution:

[0036] A mast includes an outer mast 2 vertically mounted on a frame 1, a middle mast 3 that is height-adjustable and embedded in the outer mast 2, and an inner mast 4 that is height-adjustable and embedded in the middle mast 3. The masts are slidably connected by guide rails and rollers. Under the action of a hydraulic system and a sprocket device, the middle mast 3, the inner mast 4, and the inner slide 7 reciprocate up and down at a certain proportional speed. The outer mast 2 and the middle mast 3 are both rectangular frame box structures, and both are reinforced in the horizontal and vertical directions to increase the strength and rigidity of the outer mast 2 and the middle mast 3 in the horizontal and vertical directions.

[0037] The outer gantry 2 includes a set of parallel first columns 21 in the longitudinal direction, and multiple sets of first crossbeams 22 are arranged between the first columns 21 in the transverse direction. The cross-section of the first crossbeams 22 in plan view is an "isosceles trapezoid" structure. The first columns 21 on both sides form the guide rails for the lifting of the middle gantry 3. The "isosceles trapezoid" structure of the outer gantry 2 forms a narrow body structure, which can reduce the obstruction of the corners on both sides of the outer gantry 2 and effectively improve the field of vision on the left and right sides of the gantry. The upper and lower adjacent first crossbeams 22 are connected by diagonal wrapping plates 23, and the diagonal wrapping plates 23 are also connected to the first columns 21 on the corresponding side, thus forming an integral frame box structure. The integrated structure enhances the longitudinal and transverse rigidity of the gantry and improves the stability of the gantry. At the same time, the diagonal wrapping plates 23 only adopt a single bending process. The angle is consistent with the angle of the first crossbeam 22, which is economical; the outer frame 2 is provided with a first longitudinal plate 24 in the longitudinal direction, and the first longitudinal plate 24 is connected to the center of each first crossbeam 22; the first crossbeam 22 is composed of a first cross plate 25 and a first vertical plate 26 including horizontal and vertical states, or is composed of a single horizontal first cross plate 25. The two ends of the first cross plate 25 and the first vertical plate 26 are respectively connected to the first column 21 on the corresponding side. In the technical solution of this embodiment, there are four sets of first crossbeams 22 on the outer frame 2. The upper three sets of first crossbeams 22 are all composed of first cross plates 25 and first vertical plates 26 in both horizontal and vertical states, while the lowermost set of first crossbeams 22 is composed only of the first cross plate 25 in the horizontal state.

[0038] The middle gantry 3 includes a set of parallel second columns 31 in the longitudinal direction, and multiple sets of second crossbeams 32 are arranged between the second columns 31 in the transverse direction. The second columns 31 form the guide rails for the vertical lifting of the inner gantry 4. The upper and lower adjacent second crossbeams 32 are connected by a covering plate 33, and the covering plate 33 is also connected to the second column 31 on the corresponding side, thereby making the middle gantry 3 form an integral frame box structure. The integrated structure enhances the longitudinal and transverse rigidity of the gantry and improves the stability of the gantry. The middle gantry 3 is provided with a double-layer second longitudinal plate 34 in the longitudinal direction, and the second longitudinal plate 34 is connected to each of the second crossbeams 32. 2. The center is connected, and the two layers of second longitudinal plates 34 are connected by a horizontal plate; the second horizontal beam 32 is composed of a second horizontal plate 35 and a second vertical plate 36 in both horizontal and vertical states, or it is composed of a single vertical second vertical plate 36. The two ends of the second horizontal plate 35 and the second vertical plate 36 are respectively connected to the second column 31 on the corresponding side; in the technical solution of this embodiment, there are four sets of second horizontal beams 32, of which the uppermost set of second horizontal beams 32 is composed of a second horizontal plate 35 and a second vertical plate 36 in both horizontal and vertical states, while the other three sets of second horizontal beams 32 are composed of a single vertical second vertical plate 36;

[0039] The inner gantry 4 includes a set of parallel third columns 41 in the longitudinal direction, and multiple sets of third crossbeams 42 are arranged between the third columns 41 in the transverse direction. The third columns 41 on both sides form the guide rails for the vertical movement of the inner slide 7. The inner gantry 4 has a double-layer third longitudinal plate 43 in the longitudinal direction, and the third longitudinal plate 43 is centrally connected to each of the third crossbeams 42. The double-layer third longitudinal plates 43 are connected by transverse plates. The third crossbeam 42 is composed of third crossbeams 44 in horizontal and vertical states and third columns 45, or a single vertical column 45. The third vertical plate 45 is composed of the third horizontal plate 44 and the third vertical plate 45. The two ends of the third horizontal plate 44 and the third vertical plate 45 are respectively connected to the third column 41 on the corresponding side. The third vertical plate 45 in the middle is set close to the third vertical plate 45 at the upper and lower ends to increase the field of vision. In the technical solution of this embodiment, there are four sets of third horizontal beams 42 on the inner frame 4. The uppermost third horizontal beam 42 is composed of the third horizontal plate 44 and the third vertical plate 45 in horizontal and vertical states, while the other three sets of third horizontal beams 42 are composed of only a single vertical third vertical plate 45.

[0040] To improve the stability of the entire mast, one end of the tie rod 5 is connected to the upper end of the outer mast 2, and the other end of the tie rod 5 is connected to the roof guard 6 on the upper part of the frame 1.

[0041] The inner mast 4 is equipped with an inner slide 7 that can be raised and lowered. The inner slide 7 includes a set of guide rails 71 arranged in parallel at both ends. The guide rails 71 are connected by connecting plates 72 away from their two ends to form a cantilever structure with no obstruction on both sides, thereby increasing the driver's field of vision on both sides.

[0042] This application also provides an industrial handling vehicle, specifically a human-mounted three-way stacker forklift, including the mast described above.

[0043] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A gantry frame, characterized in that: It includes an outer mast (2) vertically mounted on the frame (1), a middle mast (3) that can be raised and lowered and embedded in the outer mast (2), and an inner mast (4) that can be raised and lowered and embedded in the middle mast (3). The outer mast (2) and the middle mast (3) are both rectangular frame box structures, and the outer mast (2) and the middle mast (3) are reinforced in both the horizontal and vertical directions to increase the strength and rigidity of the outer mast (2) and the middle mast (3) in the horizontal and vertical directions. The outer gantry (2) includes a set of parallel first columns (21) in the longitudinal direction, and multiple sets of first beams (22) are arranged between the first columns (21) in the transverse direction. The cross section of the first beams (22) in plan view is an "isosceles trapezoid" structure. The upper and lower adjacent first beams (22) are connected by a sloping plate (23), and the sloping plate (23) is also connected to the first column (21) on the corresponding side. The bending angle of the sloping plate (23) is the same as the angle of the trapezoidal first beam (22). The outer gantry (2) is provided with a first longitudinal plate (24) in the longitudinal direction, and the first longitudinal plate (24) is connected to the center of each first beam (22). The first crossbeam (22) is composed of a first horizontal plate (25) and a first vertical plate (26) including horizontal and vertical states, or is composed of a single horizontal first horizontal plate (25). The two ends of the first horizontal plate (25) and the first vertical plate (26) are respectively connected to the first column (21) on the corresponding side. The middle gantry (3) includes a set of parallel second columns (31) in the longitudinal direction, and multiple sets of second beams (32) are arranged in the transverse direction between the second columns (31). The upper and lower adjacent second beams (32) are connected by a cover plate (33), and the cover plate (33) is also connected to the second column (31) on the corresponding side. The middle gantry (3) is provided with a double-layer second longitudinal plate (34) in the longitudinal direction, and the second longitudinal plate (34) is connected to the center of each second beam (32). The double-layer second longitudinal plate (34) is connected to each other by a transverse plate. The second crossbeam (32) is composed of a second horizontal plate (35) in a horizontal and a second vertical plate (36) in a vertical state, or is composed of a single second vertical plate (36) in a vertical state. The two ends of the second horizontal plate (35) and the second vertical plate (36) are respectively connected to the second column (31) on the corresponding side. The inner gantry (4) includes a set of parallel third columns (41) in the longitudinal direction, and multiple sets of third beams (42) are arranged in the transverse direction between the third columns (41). The inner gantry (4) has a double-layer third longitudinal plate (43) in the longitudinal direction, and the third longitudinal plate (43) is connected to the center of each third beam (42). The double-layer third longitudinal plate (43) is connected to each other by a transverse plate. The third crossbeam (42) is composed of a third horizontal plate (44) and a third vertical plate (45) in both horizontal and vertical states, or it is composed of a single vertical third vertical plate (45). The two ends of the third horizontal plate (44) and the third vertical plate (45) are respectively connected to the third column (41) on the corresponding side, and the third vertical plate (45) in the middle is set close to the third vertical plates (45) at the upper and lower ends to increase the field of vision space.

2. A gantry according to claim 1, characterized in that: The upper end of the outer mast (2) is connected to one end of the tie rod (5), and the other end of the tie rod (5) is connected to the roof guard (6) on the upper part of the frame (1).

3. A gantry according to claim 2, characterized in that: The inner mast (4) is equipped with an inner slide (7) that can be raised and lowered. The inner slide (7) includes a set of guide rails (71) arranged in parallel at the top and bottom. The guide rails (71) are connected by connecting plates (72) away from their two ends to form a cantilever structure, thereby increasing the driver's field of vision on both sides.

4. An industrial handling vehicle, characterized in that: Includes a gantry as described in any one of claims 1-3.

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