A boom truck and its aluminum alloy scissor lift device

Abstract

The present invention discloses a boom truck and an aluminum alloy scissor-type lifting device thereof, wherein the aluminum alloy scissor-type lifting device comprises a scissor-type main body and a driving component for pushing the scissor-type main body to be lifted or lowered, wherein both ends of the driving component are respectively connected with driving inner forks; the driving inner forks comprise a frame, a driving component mounting assembly, and a plurality of connecting plates for connecting the frame and the driving component mounting assembly, wherein the connecting plates are arranged obliquely relative to the frame. The aluminum alloy scissor-type lifting device provided by the present invention changes the force direction of the connecting plate during initial lifting through the inclined arrangement of the connecting plate, and more force components are concentrated on the extension surface of the connecting plate, which can support the driving component to the maximum extent, thereby effectively simplifying the structure of the driving inner fork, saving costs, and simplifying manufacturing.

Description

Technical Field

[0001] The present invention relates to the field of lifting equipment, in particular to an aluminum alloy scissor-type lifting device. In addition, the present invention also relates to a boom truck comprising the aluminum alloy scissor-type lifting device. Background Art

[0002] The scissor lift platform is a vertical lifting equipment, a special equipment for high-altitude operations with a wide range of uses indoors and outdoors. It can be widely used in equipment maintenance, indoor and outdoor machinery installation, equipment maintenance, and building maintenance in stations, docks, bridges, halls, and factories.

[0003] The scissor-type lifting device includes a plurality of inner forks and outer forks arranged alternately and combined, and is provided with a first inner fork, a second inner fork, a third inner fork, a fourth inner fork, a fifth inner fork, etc., and a first outer fork, a second outer fork, a third outer fork, a fourth outer fork, a fifth outer fork, etc. from bottom to top, wherein the first inner fork and the third inner fork are connected by a lower oil cylinder, and the third inner fork and the fifth inner fork are connected by an upper oil cylinder, and the lifting and lowering of the scissor-type lifting device is realized by the extension and contraction of the oil cylinder. In the prior art, an oil cylinder seat is provided at one end of the oil cylinder. In order to ensure sufficient strength and rigidity of the oil cylinder seat, generally more ribs are welded at the first vertical plate and the second vertical plate of the first inner fork, the third inner fork and the fifth inner fork, which results in complex welding, large welding input heat, serious deformation, and many welding defects.

[0004] Therefore, how to improve and simplify the inner fork structure of the scissor-type lifting device, reduce the amount of welding, and at the same time ensure strength and rigidity is a technical problem that technical personnel in this field currently need to solve. Summary of the invention

[0005] The object of the present invention is to provide an aluminum alloy scissor lift device, which has high strength and rigidity, less welding in the structure and low cost. Another object of the present invention is to provide a boom truck including the aluminum alloy scissor lift device.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] An aluminum alloy scissor-type lifting device includes a scissor-type body and a driving component for pushing the scissor-type body to rise and fall, wherein both ends of the driving component are respectively connected to a driving inner fork; the driving inner fork includes a frame, a driving component mounting assembly, and a plurality of connecting plates for connecting the frame and the driving component mounting assembly, wherein the connecting plates are arranged obliquely relative to the frame.

[0008] Preferably, the inclination direction of the connecting plate is consistent with the inclination direction of the driving component during initial lifting.

[0009] Preferably, the connecting plates are arranged in parallel and dispersedly, and the angle between the connecting plates and the extending surface of the frame is 15-20°.

[0010] Preferably, the driving component installation assembly is located in the middle of the width of the frame, and a plurality of the connecting plates are distributed on both sides of the driving component installation assembly.

[0011] Preferably, the driving component mounting assembly includes a first vertical plate, a second vertical plate and a fixing plate welded and fixed between the first vertical plate and the second vertical plate; corresponding positions of the first vertical plate and the second vertical plate are provided with axial holes for hingedly connecting the driving component.

[0012] Preferably, the first vertical plate and the second vertical plate are parallel, and the first vertical plate and the second vertical plate are arranged perpendicular to the extension surface of the frame.

[0013] Preferably, the frame includes a first rectangular tube, a second rectangular tube, and a first round tube and a second round tube respectively connected between the first rectangular tube and the second rectangular tube.

[0014] Preferably, the scissors fork body includes a first inner fork, a second inner fork, a third inner fork, a fourth inner fork, and a fifth inner fork, and a first outer fork, a second outer fork, a third outer fork, a fourth outer fork, and a fifth outer fork, which are arranged in sequence from bottom to top; the driving component includes a lower driving component and an upper driving component, one end of the lower driving component is hinged to the first inner fork, and the other end is hinged to the third inner fork, one end of the upper driving component is hinged to the third inner fork, and the other end is hinged to the fifth inner fork.

[0015] Preferably, two driving component mounting assemblies are provided on the third inner fork, and the two driving component mounting assemblies are arranged in opposite directions.

[0016] The present invention also provides a boom truck, comprising any one of the aluminum alloy scissor-type lifting devices described above.

[0017] The aluminum alloy scissor-type lifting device provided by the present invention includes a scissor-type main body, and also includes a driving component for pushing the scissor-type main body to rise and fall, and the two ends of the driving component are respectively connected to a driving inner fork; the driving inner fork includes a frame, a driving component mounting assembly, and a plurality of connecting plates for connecting the frame and the driving component mounting assembly, and the connecting plate is tilted relative to the frame. The aluminum alloy scissor-type lifting device provided by the present invention, through the tilted setting of the connecting plate, changes the force direction of the connecting plate during initial lifting, and more force components are concentrated on the extension surface of the connecting plate, which can maximize the support effect on the driving component, thereby effectively simplifying the structure of the driving inner fork, saving costs, and simplifying the production.

[0018] The arm truck provided by the present invention is provided with the above-mentioned aluminum alloy scissor-type lifting device. Since the aluminum alloy scissor-type lifting device has the above-mentioned technical effects, the arm truck provided with the aluminum alloy scissor-type lifting device should also have corresponding technical effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is a structural schematic diagram of a specific implementation of the aluminum alloy scissor-type lifting device provided by the present invention;

[0021] Figure 2 for Figure 1 A front view of the connection structure of the first inner fork, the third inner fork and the fifth inner fork in the aluminum alloy scissor-type lifting device shown;

[0022] Figure 3 for Figure 1 A three-dimensional diagram of the connection structure of the first inner fork, the third inner fork and the fifth inner fork in the aluminum alloy scissor-type lifting device shown;

[0023] Figure 4 for Figure 1 A schematic diagram of the structure of the first inner fork in the aluminum alloy scissor-type lifting device shown;

[0024] Figure 5 for Figure 1 The structural schematic diagram of the third inner fork in the aluminum alloy scissor-type lifting device shown;

[0025] Figure 6 for Figure 1 The structural schematic diagram of the fifth inner fork in the aluminum alloy scissor-type lifting device shown;

[0026] Among them: the first inner fork -101; the first outer fork -102; the second inner fork -103; the second outer fork -104; the third inner fork -105; the third outer fork -106; the fourth inner fork -107; the fourth outer fork -108; the fifth outer fork -109; the fifth inner fork -110; the sixth inner fork -111; the sixth outer fork -112; the upper cylinder -113; the lower cylinder -114; the first rectangular tube -201, the second rectangular tube -2011; the first round tube -202, the second round tube -2021; the connecting plate -203; the first vertical plate -204, the second vertical plate 2041; the fixing plate -205; the rib plate -206; the cylinder sleeve -207. DETAILED DESCRIPTION

[0027] The core of the present invention is to provide an aluminum alloy scissor lift device to reduce structural deformation and welding defects, save materials, reduce costs, and ensure rigidity and strength. Another core of the present invention is to provide a boom truck including the aluminum alloy scissor lift device.

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Please refer to Figures 1 to 6 , Figure 1 This is a structural schematic diagram of a specific implementation of the aluminum alloy scissor-type lifting device provided by the present invention; Figure 2 for Figure 1 A front view of the connection structure of the first inner fork, the third inner fork and the fifth inner fork in the aluminum alloy scissor-type lifting device shown; Figure 3 for Figure 1 A three-dimensional diagram of the connection structure of the first inner fork, the third inner fork and the fifth inner fork in the aluminum alloy scissor-type lifting device shown; Figure 4 for Figure 1 A schematic diagram of the structure of the first inner fork in the aluminum alloy scissor-type lifting device shown; Figure 5 for Figure 1 The structural schematic diagram of the third inner fork in the aluminum alloy scissor-type lifting device shown; Figure 6 for Figure 1 The schematic diagram of the structure of the fifth inner fork in the aluminum alloy scissors-type lifting device is shown.

[0030] In this embodiment, the aluminum alloy scissor-type lifting device includes a scissor body and a driving component.

[0031] Among them, the driving component is used to push the scissors fork body to rise and fall, and the two ends of the driving component are respectively connected to the driving inner forks. Specifically, the driving component drives the rotation of the driving inner forks to realize the lifting and lowering of the entire device.

[0032] Furthermore, the driving inner fork includes a frame, a driving component mounting assembly, and a plurality of connecting plates 203 for connecting the frame and the driving component mounting assembly. The driving component is hingedly mounted on the driving component mounting assembly. The connecting plates 203 are arranged to be inclined relative to the frame, and the inclination direction of the connecting plates 203 is consistent with the inclination direction of the driving component during initial lifting. Specifically, the connecting plates 203 are inclined relative to the extension surface of the frame.

[0033] Preferably, the driving component is a cylinder, and this article takes the cylinder as an example for introduction.

[0034] The aluminum alloy scissor-type lifting device provided by the present invention changes the force direction of the connecting plate 203 during initial lifting by tilting the connecting plate 203, so that more force components are concentrated on the extended surface of the connecting plate 203, which can provide maximum support for the driving components, thereby effectively simplifying the structure of the driving inner fork, saving costs and simplifying manufacturing.

[0035] On the basis of the above-mentioned embodiments, each connecting plate 203 is arranged in parallel and dispersedly, that is, after each connecting plate 203 is tilted relative to the frame, it is arranged in sequence after being spaced by a preset interval to form a shutter structure. The distribution is carried out according to the principle of mechanical topology, which can ensure the strength and stiffness of the structure, has a simple structure, requires less welding input heat, and has small welding deformation.

[0036] Most preferably, the inclination direction of the connecting plate 203 is consistent with the inclination direction of the driving component during the initial lifting, so that the force direction of the connecting plate 203 and the driving component during the initial lifting are consistent, which can provide maximum support for the driving component; of course, the inclination direction of the connecting plate 203 is not limited to being consistent with the inclination direction of the driving component during the initial lifting. Under the premise of convenient installation, the inclination direction of the connecting plate 203 and the inclination direction of the driving component during the initial lifting may have a preset angle. For example, the angle between the connecting plate 203 and the extension surface of the frame can be 15-20°.

[0037] On the basis of the above-mentioned embodiments, the connection plate 203 and the frame as well as the connection plate 203 and the drive component mounting assembly are all welded, and the welding connection is firm, convenient and low-cost.

[0038] Based on the above-mentioned embodiments, the driving component installation assembly is located in the middle of the width of the frame, and a plurality of connecting plates 203 are distributed on both sides of the driving component installation assembly, that is, the connecting plates 203 are used to fix the driving component installation assembly on the frame; setting the driving component installation assembly in the middle of the width of the frame can also ensure the connection stability of the driving component.

[0039] On the basis of the above-mentioned embodiments, the driving component installation assembly includes a first vertical plate 204, a second vertical plate 2041 and a fixing plate 205 welded and fixed between the first vertical plate 204 and the second vertical plate 2041, the fixing plate 205 is used to achieve the fixation between the first vertical plate 204 and the second vertical plate 2041, and the number of the fixing plates 205 can be multiple; the corresponding positions of the first vertical plate 204 and the second vertical plate 2041 are provided with axial holes for hinged driving components.

[0040] Based on the above embodiments, the first vertical plate 204 and the second vertical plate 2041 are parallel, and the first vertical plate 204 and the second vertical plate 2041 are arranged perpendicular to the extension surface of the frame, that is, the first vertical plate 204 and the second vertical plate 2041 extend longitudinally to facilitate the arrangement of the driving components.

[0041] On the basis of the above embodiments, the frame includes a first rectangular tube 201, a second rectangular tube 2011, and a first round tube 202 and a second round tube 2021 respectively connected between the first rectangular tube 201 and the second rectangular tube 2011. Preferably, the connecting plate 203 is perpendicular to the inner surface of the first rectangular tube 201 or the second rectangular tube 2011, and the connecting plate 203 is perpendicular to the surface of the first vertical plate 204 and the second vertical plate 2041, so as to improve the stability of the connecting plate 203 and facilitate welding.

[0042] On the basis of the above-mentioned embodiments, the scissors fork body includes a first inner fork 101, a second inner fork 103, a third inner fork 105, a fourth inner fork 107, a fifth inner fork 110, a sixth inner fork 111, and a first outer fork 102, a second outer fork 104, a third outer fork 106, a fourth outer fork 108, a fifth outer fork 109, and a sixth outer fork 112, which are arranged in sequence from bottom to top; the driving component includes a lower driving component and an upper driving component, one end of the lower driving component is hinged to the first inner fork 101, and the other end is hinged to the third inner fork 105, and one end of the upper driving component is hinged to the third inner fork 105, and the other end is hinged to the fifth inner fork 110.

[0043] On the basis of the above embodiments, two driving component installation assemblies are provided on the third inner fork 105, which are respectively located on the left and right sides of the third inner fork 105, and the two driving component installation assemblies are arranged in opposite directions.

[0044] In a specific embodiment, the scissor body is assembled by staggered connection of outer forks and inner forks. Figure 1 As shown, from bottom to top, there are a first inner fork 101, a second inner fork 103, a third inner fork 105, a fourth inner fork 107, a fifth inner fork 110, and a first outer fork 102, a second outer fork 104, a third outer fork 106, a fourth outer fork 108, and a fifth outer fork 109. The first inner fork 101 is staggered with the first outer fork 102, the second inner fork 103 is staggered with the second outer fork 104, the third inner fork 105 is staggered with the third outer fork 106, and the fourth inner fork 109 is staggered. Fork 107 is staggered with the fourth outer fork 108, and the fifth inner fork 110 is staggered with the fifth outer fork 109; the lower cylinder 114 is connected between the first inner fork 101 and the third inner fork 105, and the upper cylinder 113 is connected between the third inner fork 105 and the fifth inner fork 110, that is, the first inner fork 101, the third inner fork 105 and the fifth inner fork 110 are used as driving inner forks; the rising and falling of the inner and outer forks are realized by the extension and retraction of the upper cylinder 113 and the lower cylinder 114.

[0045] When the scissors body is lifted from the lowest position, the driving component installation assembly of the first inner fork 101, the third inner fork 105, and the fifth inner fork 110 is subjected to the greatest force, and the structural stress state is the worst. In view of the difficulty of welding aluminum alloy and the difficulty of using complex welding structures, the connecting plate 203 of the driving component installation assembly is designed as a shutter structure. When the scissors are at the lowest posture, the arrangement direction of the connecting plate 203 is consistent with the force direction of the oil cylinder, which minimizes the welding amount of the first inner fork 101, the third inner fork 105, and the fifth inner fork 110, and maximizes the strength and stiffness of the structure.

[0046] like Figure 2 and Figure 3 As shown, the shaft hole of the cylinder barrel of the lower oil cylinder 114 is aligned with the shaft hole of the driving component installation assembly of the first inner fork 101, and connected by a shaft; the head shaft hole of the cylinder rod of the lower oil cylinder 114 is aligned with the shaft hole of the driving component installation assembly on the right side of the third inner fork 105, and connected by a shaft; the shaft hole of the cylinder barrel of the upper oil cylinder 113 is aligned with the shaft hole of the driving component installation assembly on the left side of the third inner fork 105, and connected by a shaft; the head shaft hole of the cylinder rod of the upper oil cylinder 113 is aligned with the shaft hole of the driving component installation assembly at the right end of the fifth inner fork 110, and connected by a shaft; shaft holes are processed on the vertical plates of the first inner fork 101, the third inner fork 105, and the fifth inner fork 110, and the connecting plate 203 connects the rectangular tube with the vertical plate; the connecting plate 203 and the rectangular tube are arranged at a preset inclination angle, which is consistent with the angle direction of the oil cylinder when the scissors body is at the lowest position. When the oil cylinder is lifted, the structure is more evenly and reasonably stressed, and the structure is optimized. The welding is simplified.

[0047] like Figure 4 As shown, the first inner fork 101 is a welded structure, including a rectangular tube, a connecting plate 203, a vertical plate, a fixed plate 205, a rib plate 206, a cylinder sleeve 207 and a round tube. The cylinder sleeve 207 is welded in the holes of the first vertical plate 204 and the second vertical plate 2041. The connecting plate 203 is welded to the vertical plate. The rib plate 206 is welded to the cylinder sleeve 207, the vertical plate and the fixed plate 205. The fixed plate 205 is located at the bottom of the vertical plate. Each connecting plate 203 is welded to the vertical plate and the rectangular tube. Each connecting plate 203 is arranged in parallel, with an angle of 15° to 20° with the upper surface of the rectangular tube. When the scissors start to lift, the arrangement direction of each connecting plate 203 is basically consistent with the direction of the cylinder force.

[0048] like Figure 5As shown, the third inner fork 105 is a welded structure, including two groups of rectangular tubes, connecting plates 203, vertical plates, fixed plates 205 and round tubes, and each connecting plate 203 is welded to the vertical plate and the rectangular tube; each connecting plate 203 located on the left side of the third inner fork 105 is arranged in parallel, with an angle of 15° to 20° with the upper surface of the rectangular tube, and the fixed plate 205 is located at the bottom of the vertical plate. When the scissors start to lift, the arrangement direction of each connecting plate 203 is basically consistent with the direction of the cylinder force; each connecting plate 203 located on the right side of the third inner fork 105 is arranged in parallel, with an angle of 15° to 20° with the upper surface of the rectangular tube, and the fixed plate 205 is located at the top of the vertical plate. When the scissors start to lift, the arrangement direction of each connecting plate 203 is basically consistent with the direction of the cylinder force.

[0049] like Figure 6 As shown, the fifth inner fork 110 is a welded structure, including a rectangular tube, a connecting plate 203, a vertical plate, a round tube and a fixed plate 205. The fixed plate 205 is located at the bottom of the vertical plate. Each connecting plate 203 is welded to the vertical plate and the rectangular tube. Each connecting plate 203 is arranged in parallel and has an angle of 15° to 20° with the upper surface of the rectangular tube. When the scissors start to lift, the arrangement direction of each connecting plate 203 is basically consistent with the direction of the cylinder force.

[0050] The aluminum alloy scissors-type lifting device provided in this embodiment not only ensures the strength and rigidity of the first inner fork 101, the third inner fork 105 and the fifth inner fork 110, but also removes a large number of ribs 206 in the prior art, thereby minimizing the amount of welding in the structure, reducing welding deformation and welding defects.

[0051] In addition to the above-mentioned aluminum alloy scissor-type lifting device, the present invention also provides an arm truck including the above-mentioned aluminum alloy scissor-type lifting device. For the structure of other parts of the arm truck, please refer to the prior art and will not be described in detail herein.

[0052] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0053] The aluminum alloy scissor-type lifting device provided by the present invention is introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. An aluminum alloy scissor lift device, comprising a scissor body, characterized in that: It also includes a driving component for driving the scissor fork body to be lifted or lowered, and both ends of the driving component are respectively connected to driving inner forks; the driving inner forks include a frame, a driving component mounting assembly, and a plurality of connecting plates (203) for connecting the frame and the driving component mounting assembly, and the connecting plates (203) are arranged obliquely relative to the frame; The connecting plates (203) are arranged in parallel and dispersedly, and the angle between the connecting plates (203) and the extension surface of the frame is 15-20°; The inclination direction of the connecting plate (203) is consistent with the inclination direction of the driving component during initial lifting.

2. The aluminum alloy scissor-type lifting device according to claim 1, characterized in that: The driving component installation assembly is located in the middle of the width of the frame, and a plurality of connecting plates (203) are distributed on both sides of the driving component installation assembly.

3. The aluminum alloy scissor-type lifting device according to claim 1, characterized in that: The driving component mounting assembly comprises a first vertical plate (2041), a second vertical plate (204), and a fixing plate (205) welded and fixed between the first vertical plate (2041) and the second vertical plate (204); corresponding positions of the first vertical plate (2041) and the second vertical plate (204) are provided with shaft holes for hingedly connecting the driving component.

4. The aluminum alloy scissor-type lifting device according to claim 3, characterized in that: The first vertical plate (2041) and the second vertical plate (204) are parallel, and the first vertical plate (2041) and the second vertical plate (204) are arranged perpendicular to the extension surface of the frame.

5. The aluminum alloy scissor-type lifting device according to claim 1, characterized in that: The frame comprises a first rectangular tube (201), a second rectangular tube (2011), and a first round tube (202) and a second round tube (2021) respectively connected between the first rectangular tube (201) and the second rectangular tube (2011).

6. The aluminum alloy scissor-type lifting device according to any one of claims 1 to 5, characterized in that: The scissors-type fork body comprises a first inner fork (101), a second inner fork (103), a third inner fork (105), a fourth inner fork (107), a fifth inner fork (110), and a first outer fork (102), a second outer fork (104), a third outer fork (106), a fourth outer fork (108), and a fifth outer fork (109), which are arranged in sequence from bottom to top; the driving component comprises a lower driving component and an upper driving component, one end of the lower driving component is hinged to the first inner fork (101), and the other end is hinged to the third inner fork (105), and one end of the upper driving component is hinged to the third inner fork (105), and the other end is hinged to the fifth inner fork (110).

7. The aluminum alloy scissor-type lifting device according to claim 6, characterized in that: The third inner fork (105) is provided with two drive component mounting assemblies, and the two drive component mounting assemblies are arranged in opposite directions.

8. A boom truck, comprising an aluminum alloy scissor lift device, characterized in that: The aluminum alloy scissors-type lifting device is the aluminum alloy scissors-type lifting device according to any one of claims 1 to 7.

Images