Cantilever crane structure

Abstract

The utility model discloses a cantilever crane structure which comprises a stand column, a suspension arm, a first sliding rail mechanism, a second sliding rail mechanism and a hoisting mechanism, and the mode that a first sliding rail and a second sliding rail are vertically arranged in the horizontal direction is adopted in the cantilever crane structure, so that the first sliding rail and the second sliding rail form a mechanism capable of allowing an object to be hoisted to move freely in the plane; according to the cantilever crane, the rotating design of the cantilever is omitted, collision between the cantilever and objects around the cantilever crane in the rotating process is avoided, meanwhile, two first limiting assemblies are detachably arranged on the first sliding rail, and two second limiting assemblies are detachably arranged on the second sliding rail; the plane motion of the hoisting mechanism is limited within a limited range through the multiple limiting assemblies, then the swing range of the to-be-hoisted object is limited, the risk of accidents can be reduced, and meanwhile, the multiple detachable limiting assemblies can facilitate workers to adjust the motion range of the to-be-hoisted object and the position of the range according to actual conditions.

Description

Technical Field

[0001] The present application relates to the technical field of cranes, and in particular to a cantilever crane structure. Background Art

[0002] Cantilever crane is a commonly used lifting equipment. With the continuous development of economy, cantilever crane has been widely used in economic construction. The cantilever crane currently used often realizes the movement of materials by rotating the cantilever. When lifting objects in a small space, it is easy to collide with the surrounding due to the swing of the cantilever. Therefore, how to realize material transfer and avoid cantilever collision is a problem that needs to be solved. Utility Model Content

[0003] The embodiment of the present application provides a cantilever crane structure, which can reduce the risk of accidents and also enable the movement of the suspended object in a plane.

[0004] The embodiment of the present application provides a cantilever crane structure, including a column, a crane arm, a first slide rail mechanism, a second slide rail mechanism and a lifting mechanism;

[0005] One end of the column is fixedly arranged, and the boom is horizontally arranged on the other end of the column;

[0006] The first slide rail mechanism includes a first slide rail, a first travel assembly and two first limit assemblies; the first slide rail is horizontally arranged on the boom, and the first slide rail is provided with a first slide groove along its length direction; the first travel assembly includes a first pulley and a connecting piece; the first pulley is movably arranged in the first slide rail, and at least part of the first pulley is downwardly passed through the first slide groove; the connecting piece is connected to the first pulley and is located at the lower side of the first slide rail; the two first limit assemblies are detachably arranged on the first slide rail, and the two first limit assemblies are relatively arranged on both sides of the first pulley for limiting the first pulley;

[0007] The second slide rail mechanism includes a second slide rail, a second travel assembly and two second limit assemblies; the second slide rail is horizontally arranged on the connecting member, and the second slide rail is provided with a second slide groove along its length direction, and the length direction of the second slide rail is perpendicular to the length direction of the first slide rail; the second travel assembly includes a second pulley, the second pulley is movably arranged in the second slide rail, and at least part of the second pulley is downwardly passed through the second slide groove; the two second limit assemblies are detachably arranged on the second slide rail, and the two second limit assemblies are relatively arranged on both sides of the second pulley for limiting the second pulley;

[0008] The lifting mechanism is connected to the second pulley and is used for connecting with an external object to be lifted.

[0009] The cantilever suspension structure of the present application has at least the following beneficial effects:

[0010] The cantilever crane structure of the present application includes a column, a boom, a first slide rail mechanism, a second slide rail mechanism and a lifting mechanism. The present application adopts a method of arranging the first slide rail and the second slide rail vertically in the horizontal direction, so that the first slide rail and the second slide rail constitute a mechanism that can allow the object to be lifted to move arbitrarily in a plane. The present application cancels the rotation design of the cantilever, thereby avoiding the collision of the cantilever with objects around the cantilever crane during rotation. At the same time, two first limit assemblies are detachably provided on the first slide rail, and two second limit assemblies are also detachably provided on the second slide rail. The planar movement of the lifting mechanism is limited to a limited range through multiple limit assemblies, thereby limiting the swing range of the object to be lifted, which can reduce the risk of accidents. At the same time, the multiple detachable limit assemblies can facilitate the staff to adjust the movement range of the object to be lifted and the position of the range according to actual conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0012] Figure 1 It is a schematic diagram of the cantilever crane structure;

[0013] Figure 2 It is a top view of the cantilever crane structure;

[0014] Figure 3 It is a partial schematic diagram of the cantilever crane structure;

[0015] Figure 4 yes Figure 2 AA schematic diagram;

[0016] Figure 5 yes Figure 4 The enlarged view of point A in the middle;

[0017] Figure 6 is a structural schematic diagram of a first limit assembly;

[0018] Figure 7 yes Figure 2 BB schematic diagram;

[0019] Figure 8 yes Figure 7 The enlarged view of point B in the middle;

[0020] Fig. 9 It is a partial bottom view of the cantilever crane structure;

[0021] The description of the reference numerals is as follows: 10, column;

[0022] 20. Jib;

[0023] 30. first slide rail mechanism; 31. first slide rail; 31a. first slide groove; 32. first travel assembly; 321. first pulley; 322. connecting piece; 323. first roller; 33. first limit assembly; 331. first built-in plate; 332. first external plate; 333. first adjusting bolt; 334. first limit column; 335. first displacement sensor; 34. first elastic top block;

[0024] 40. Second slide rail mechanism; 41. Second slide rail; 41a. Second slide groove; 42. Second travel assembly; 421. Second pulley; 422. Second roller; 43. Second limit assembly; 431. Second built-in plate; 432. Second external plate; 433. Second adjustment bolt; 434. Second limit column; 435. Second displacement sensor; 44. Second elastic top block;

[0025] 50. Lifting mechanism; 51. Intermediate connecting rod; 52. Lifting hoist;

[0026] 60. Installation mechanism; 61. I-beam; 62. Clamping assembly; 621. Tightening bolt; 622. Clamping arc strip. DETAILED DESCRIPTION

[0027] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating the examples of the present application.

[0028] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0029] like Figure 1As shown, this embodiment discloses a cantilever crane structure, which includes a column 10, a suspension arm 20, a first slide rail mechanism 30, a second slide rail mechanism 40 and a lifting mechanism 50, and the specific structure is as follows:

[0030] like Figure 1 As shown, the column 10 is vertically arranged, and the lower end of the column 10 is fixedly arranged on an external foundation.

[0031] like Figure 1 As shown, the boom 20 is horizontally arranged at the upper end of the column 10, and a reinforcement structure (such as a reinforcement plate, etc.) is arranged between the boom 20 and the column 10.

[0032] like Figure 1 and Figure 2 As shown, the first slide rail mechanism 30 is connected to the boom 20, wherein the first slide rail mechanism 30 can be directly fixed and welded on the lower side of the boom 20, or can be installed on the lower side of the boom 20 through the mounting mechanism 60. In this embodiment, the boom 20 is preferably installed on the lower side of the boom 20 through the mounting mechanism 60. There are two first slide rail mechanisms 30, both of which are arranged on the lower side of the boom 20 through the mounting mechanism 60, and the two first slide rail mechanisms 30 are arranged at intervals. The purpose of designing two first slide rail mechanisms 30 is to increase the stability of the structure.

[0033] like Figure 3 As shown, the mounting mechanism 60 includes an I-beam 61 and a clamping assembly 62. The length direction of the I-beam 61 is consistent with the length direction of the first slide rail mechanism 30. The I-beam 61 is fixedly connected to the boom 20, and a reinforcing rib can be designed between the I-beam 61 and the boom 20. The I-beam 61 is located directly above the first slide rail mechanism 30. The I-beam 61 and the first slide rail mechanism 30 (specifically, the first slide rail 31) are connected by a clamping assembly 62, and the number of the clamping assemblies 62 is at least two. The clamping assembly 62 includes a tightening bolt 621 and two clamping arcs 622. The two clamping arcs 622 are respectively arranged on both sides of the width direction of the I-beam 61. Each clamping arc 622 is provided with a first arc groove and a second arc groove. The first arc groove is located at the top and the second arc groove is located at the bottom. The first arc grooves of the two clamping arcs 622 can be enclosed and wrapped on the lower wing plate of the I-beam 61. The second arc grooves of the two clamping arcs 622 are enclosed and wrapped on the outer periphery of the first slide rail 31. The tightening bolt 621 is connected between the two clamping arcs 622. When the tightening bolt 621 is screwed in, the two clamping arcs 622 tightly clamp the I-beam 61 and the first slide rail 31, thereby realizing a stable connection between the first slide rail 31 and the I-beam 61. The mounting mechanism 60 in this embodiment is simple in form and easy to disassemble and assemble.

[0034] like Figure 4As shown, the first slide rail mechanism 30 includes a first slide rail 31, a first travel assembly 32 and two first limit assemblies 33. The first travel assembly 32 can move on the first slide rail 31 along the length direction of the first slide rail 31. The two first limit assemblies 33 are respectively arranged on both sides of the first travel assembly 32 along the length direction of the first slide rail 31, and are used to limit the movement of the first travel assembly 32 on the first slide rail 31, as follows:

[0035] like Figure 3 As shown, the first slide rail 31 is connected to the clamping assembly 62 of the mounting mechanism 60, the first slide rail 31 is horizontally arranged, and the length direction of the first slide rail 31 is consistent with the length direction of the I-beam 61, and the lower bottom wall of the first slide rail 31 is provided with a first slide groove 31a along its length direction, and the first slide groove 31a plays a role of limiting and guiding.

[0036] like Figure 5 As shown, the first walking component 32 includes a first pulley 321, a connecting member 322 and a plurality of first rollers 323. The first pulley 321 is movably arranged in the first slide rail 31 and can move along the length direction of the first slide rail 31. In the present embodiment, the first pulley 321 is rollably arranged in the first slide rail 31 through the first rollers 323, wherein six first rollers 323 are rollably arranged on the first pulley 321, wherein the outer circumferences of four first rollers 323 are in rolling contact with the inner bottom surface of the first slide rail 31, and the outer circumferences of the other two first rollers 323 are in rolling contact with the inner side surface of the first slide rail 31. At least part of the structure of the first pulley 321 passes downward through the first slide groove 31a and extends to the lower side of the first slide rail 31. The connecting member 322 is connected to the lower end of the first pulley 321, and the connecting member 322 is located directly below the first slide rail 31. The connecting member 322 is surrounded by the outer periphery of the second slide rail mechanism 40 (specifically the second slide rail 41), and can achieve a fixed connection with the second slide rail 41.

[0037] In this embodiment, the first pulley 321 is designed to be rollable by means of a plurality of first rollers 323 , so that the first pulley 321 can move smoothly within the first slide rail 31 .

[0038] like Figure 5 As shown, first elastic top blocks 34 are respectively provided on both sides of the first pulley 321, that is, the two first elastic top blocks 34 are respectively connected to the two sides of the first pulley 321 along the length direction of the first slide rail 31. When the first pulley 321 rolls to the extreme position, the first elastic top blocks 34 can be against the first limiting assembly 33, thereby realizing the limiting of the first pulley 321. The first elastic top blocks 34 are designed to be elastic materials such as rubber, which can avoid rigid contact between the first pulley 321 and other structures and reduce structural shaking.

[0039] like Figure 4 As shown, the two first limiting components 33 are detachably arranged on the first slide rail 31, and the two first limiting components 33 are relatively arranged on both sides of the first pulley 321, for limiting the first pulley 321;

[0040] like Figure 5 and Figure 6 As shown, the first limiting assembly 33 includes a first built-in plate 331, a first external plate 332, a first adjusting bolt 333 and a first limiting column 334. The first built-in plate 331 and the first external plate 332 are stacked up and down, the first built-in plate 331 is attached to the inner bottom surface of the first slide rail 31, the first external plate 332 is attached to the outer bottom surface of the first slide rail 31, and the first built-in plate 331 and the first external plate 332 are connected by the first adjusting bolt 333. Specifically, the first adjusting bolt 333 is vertically penetrated on the first external plate 332, and the first adjusting bolt 333 is upwardly penetrated through the first slide groove 31a and is threadedly connected to the first built-in plate 331. When the first adjusting bolt 333 is threadedly screwed in, the first external plate 332 The outer plate 332 and the first inner plate 331 clamp the first slide rail 31 in the height direction. At this time, the entire first limiting assembly 33 can be firmly fixed on the first slide rail 31 to play a limiting role. When the first adjusting bolt 333 is threaded back, the first external plate 332 and the first inner plate 331 loosen the first slide rail 31. At this time, the entire first limiting assembly 33 can adjust the position along the length direction of the first slide rail 31, so as to facilitate adaptation to different working conditions; the first limiting column 334 is arranged on the first inner plate 331, and the first limiting column 334 is located on the side of the first inner plate 331 facing the first elastic top block 34. When the first pulley 321 rolls to the extreme position, the first elastic top block 34 can be against the first limiting column 334.

[0041] Preferably, Figure 6 As shown, the axis position of the first limit column 334 is recessed inward to form a first placement groove, and a first displacement sensor 335 is arranged in the first placement groove. The first displacement sensor 335 corresponds to the first elastic top block 34. The first displacement sensor 335 can detect the distance between it and the first elastic top block 34 in the length direction of the first slide rail 31. The distance can be fed back to the external staff through a display structure such as a display screen or a display, which can facilitate the external staff to accurately adjust the position of the object to be hoisted, and at the same time feed back the limit distance to the staff. In some schemes, a power module is arranged on the first built-in board 331, and the power module is electrically connected to the first displacement sensor 335, and the power module supplies power to the first displacement sensor 335.

[0042] like Figure 7As shown, the second slide rail mechanism 40 includes a second slide rail 41, a second travel assembly 42 and two second limit assemblies 43. The second slide rail 41 is fixedly connected to the connecting piece 322 below the first slide rail 31. The second travel assembly 42 is movably arranged in the second slide rail 41. The two second limit assemblies 43 are respectively arranged on both sides of the second travel assembly 42 along the length direction of the second slide rail 41, and are used to limit the movement stroke of the second travel assembly 42, as follows:

[0043] like Figure 8 and Fig. 9 As shown, the second slide rail 41 is horizontally arranged, and the lower bottom wall of the second slide rail 41 is provided with a second slide groove 41a along its length direction, and the second slide groove 41a can play a guiding and limiting role, wherein the length direction of the second slide rail 41 is perpendicularly intersected with the projection of the length direction of the first slide rail 31 in the horizontal plane, so that the object to be hoisted can be moved arbitrarily in the plane. Among them, at least part of the structure of the second pulley 421 passes downward through the second slide groove 41a and extends to the lower side of the second slide rail 41, and the lifting mechanism 50 is connected to the lower end of the second pulley 421.

[0044] like Figure 8 As shown, the second walking component 42 includes a second pulley 421 and a plurality of second rollers 422. The second pulley 421 is movably arranged in the second slide rail 41. In the present embodiment, the second pulley 421 is rollably arranged in the second slide rail 41 through the plurality of second rollers 422, wherein the plurality of second rollers 422 are rollably arranged on the second pulley 421, and the outer peripheral surface of the second roller 422 is in rolling contact with the inner bottom surface of the second slide rail 41.

[0045] like Figure 8 As shown, second elastic top blocks 44 are respectively provided on both sides of the second pulley 421, and the two second elastic top blocks 44 are respectively located on both sides of the second pulley 421 along the length direction of the second slide rail 41, and the second elastic top blocks 44 can abut against the second limit assembly 43 along the length direction of the second slide rail 41, thereby realizing the limit of the second pulley 421. The second elastic top blocks 44 are designed to be elastic materials such as rubber, which can avoid the rigid contact between the second pulley 421 and other structures and reduce structural shaking.

[0046] like Figure 6 and Figure 8 As shown, the two second limiting components 43 are detachably arranged on the second slide rail 41, and the two second limiting components 43 are relatively arranged on both sides of the second pulley 421, for limiting the second pulley 421; the first limiting component 33 and the second limiting component 43 of this embodiment have the same structural form, and the specific structure of the second limiting component 43 is as follows:

[0047] The second limiting assembly 43 includes a second built-in plate 431, a second external plate 432, a second adjusting bolt 433 and a second limiting column 434; the second built-in plate 431 and the second external plate 432 are stacked up and down, the second built-in plate 431 is attached to the inner bottom surface of the second slide rail 41, the second external plate 432 is attached to the outer bottom surface of the second slide rail 41, and the second built-in plate 431 and the second external plate 432 are connected by the second adjusting bolt 433. Specifically, the second adjusting bolt 433 is vertically penetrated on the second external plate 432, and the second adjusting bolt 433 is upwardly penetrated through the second slide groove 41a and is threadedly connected to the second built-in plate 431. When the second adjusting bolt 433 is threaded in, the second external plate 432 and the second built-in plate 431 clamp the second slide rail 41 in the height direction. At this time, the entire second limiting assembly 43 can be firmly fixed on the second slide rail 41 to play a limiting role. When the second adjusting bolt 433 is threaded back, the second external plate 432 and the second built-in plate 431 loosen the second slide rail 41. At this time, the entire second limiting assembly 43 can adjust the position along the length direction of the second slide rail 41, so as to facilitate adaptation to different working conditions; the second limiting column 434 is arranged on the second built-in plate 431, and the second limiting column 434 is located on the side of the second built-in plate 431 facing the second elastic top block 44. When the second pulley 421 rolls to the extreme position, the second elastic top block 44 can be against the second limiting column 434.

[0048] Preferably, the axial position of the second limit column 434 is recessed inward to form a second placement groove, and a second displacement sensor 435 is arranged in the second placement groove. The second displacement sensor 435 corresponds to the second elastic top block 44. The second displacement sensor 435 can detect the distance between it and the second elastic top block 44 in the length direction of the second slide rail 41, and the distance can be fed back to the external staff through a display structure such as a display screen or a display. In some schemes, a power module is arranged on the second built-in board 431, and the power module is electrically connected to the second displacement sensor 435, and the power module supplies power to the second displacement sensor 435.

[0049] like Figure 8 As shown, the lifting mechanism 50 includes an intermediate connecting rod 51 and a lifting hoist 52. The upper end of the intermediate connecting rod 51 is movably connected (universal connection) to the second pulley 421 of the second slide rail mechanism 40, and the lower end of the intermediate connecting rod 51 is connected to the lifting hoist 52, and the lifting hoist 52 is connected to the object to be lifted.

[0050] It should be noted that in this solution, due to the limitations of on-site conditions, no corresponding driving mechanism is designed to drive the first pulley 321 or the second pulley 421 to move autonomously. Therefore, the lifted object can be pushed to move in the plane by hand pushing. However, in some scenarios with corresponding conditions, a telescopic mechanism such as a telescopic cylinder or an electric push rod can be designed to drive the first pulley 321 or the second pulley 421 to move autonomously. For example, one end of the telescopic mechanism is connected to the first slide rail 31 or the second slide rail 41, and the other end of the telescopic mechanism is connected to the first pulley 321 or the second pulley 421. The telescopic mechanism is used to drive the first pulley 321 to move autonomously on the first slide rail 31, or the telescopic mechanism is used to drive the second pulley 421 to move autonomously on the second slide rail 41.

[0051] A working method of the cantilever suspension structure of this embodiment is as follows:

[0052] 1. The hoisting hoist 52 is adjusted in position in the plane through the first slide rail 31 and the second slide rail 41 until the hoisting hoist 52 is located above the object to be hoisted;

[0053] 2. After the hoisting hoist 52 is lowered and connected to the object to be hoisted, the object to be hoisted is hoisted;

[0054] 3. After manually pushing the hoisted object to the predetermined position in the plane, lower the object to be hoisted and the hoisting is completed.

[0055] The above is only a specific implementation of the present application. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, modules and units described above can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here. It should be understood that the protection scope of the present application is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in this application, and these modifications or replacements should be included in the protection scope of this application.

Claims

1. A cantilever crane structure, characterized in that: It comprises a column (10), a suspension arm (20), a first slide rail mechanism (30), a second slide rail mechanism (40) and a lifting mechanism (50); One end of the column (10) is fixedly arranged, and the boom (20) is horizontally arranged on the other end of the column (10); The first slide rail mechanism (30) comprises a first slide rail (31), a first travel assembly (32) and two first limit assemblies (33); the first slide rail (31) is horizontally arranged on the boom (20), and the first slide rail (31) is provided with a first slide groove (31a) along its length direction; the first travel assembly (32) comprises a first pulley (321) and a connecting member (322); the first pulley (321) is movably arranged in the first slide rail (31), and at least a part of the first pulley (321) is downwardly provided with the first slide groove (31a); the connecting member (322) is connected to the first pulley (321) and is located at the lower side of the first slide rail (31); the two first limit assemblies (33) are detachably arranged on the first slide rail (31), and the two first limit assemblies (33) are relatively arranged on both sides of the first pulley (321) for limiting the first pulley (321); The second slide rail mechanism (40) comprises a second slide rail (41), a second travel component (42) and two second limit components (43); the second slide rail (41) is horizontally arranged on the connecting member (322), and the second slide rail (41) is provided with a second slide groove (41a) along its length direction, and the length direction of the second slide rail (41) is perpendicular to the length direction of the first slide rail (31); the second travel component (42) comprises a second pulley (421), and the second pulley (421) is movably arranged in the second slide rail (41), and at least part of the second pulley (421) is downwardly provided with the second slide groove (41a); the two second limit components (43) are detachably arranged on the second slide rail (41), and the two second limit components (43) are relatively arranged on both sides of the second pulley (421) for limiting the second pulley (421); The lifting mechanism (50) is connected to the second pulley (421) and is used to connect to an external object to be lifted.

2. The cantilever structure according to claim 1, characterized in that: The suspension arm (20) is connected to the first slide rail (31) via a mounting mechanism (60); the mounting mechanism (60) comprises an I-beam (61) and a clamping assembly (62); The I-beam (61) is arranged on the boom (20), and the length direction of the I-beam (61) is parallel to the length direction of the first slide rail (31); the clamping assembly (62) includes a tightening bolt (621) and two clamping arcs (622), the two clamping arcs (622) are respectively arranged on both sides of the width direction of the I-beam (61), and the two clamping arcs (622) are both provided with a first arc groove and a second arc groove, the tightening bolt (621) connects the two clamping arcs (622), the first arc grooves of the two clamping arcs (622) are clamped on the lower wing plate of the I-beam (61), and the two second arc grooves are clamped on the outer periphery of the first slide rail (31).

3. The cantilever structure according to claim 1, characterized in that: The first walking assembly (32) further comprises a plurality of first rollers (323) rollably arranged on the first pulley (321), and the outer peripheral surfaces of the plurality of first rollers (323) are in rolling contact with the inner bottom surface and the inner side surface of the first slide rail (31) respectively; First elastic top blocks (34) are provided on both sides of the first pulley (321), and the first elastic top blocks (34) can abut against the first limit assembly (33).

4. The cantilever structure according to claim 3, characterized in that: The first limiting assembly (33) comprises a first built-in plate (331), a first external plate (332), a first adjusting bolt (333) and a first limiting column (334); the first built-in plate (331) is arranged in the first slide rail (31), and the first limiting column (334) is arranged on the first built-in plate (331) for abutting against the first elastic top block (34); the first external plate (332) is arranged in close contact with the lower side of the first slide rail (31), the first adjusting bolt (333) passes through the first external plate (332) and the first slide groove (31a) in sequence, and the first adjusting bolt (333) is threadedly connected to the first built-in plate (331).

5. The cantilever structure according to claim 4, characterized in that: The first limiting assembly (33) further comprises a first displacement sensor (335), which is arranged on the first limiting column (334) and corresponds to the first elastic top block (34).

6. The cantilever structure according to claim 1, characterized in that: The second walking assembly (42) further comprises a plurality of second rollers (422) rollably arranged on the second pulley (421), the outer circumference of the second rollers (422) being in rolling contact with the inner bottom surface of the second slide rail (41); Second elastic top blocks (44) are provided on both sides of the second pulley (421), and the second elastic top blocks (44) can abut against the second limit assembly (43).

7. The cantilever structure according to claim 6, characterized in that: The second limiting assembly (43) comprises a second built-in plate (431), a second external plate (432), a second adjusting bolt (433) and a second limiting column (434); the second built-in plate (431) is arranged in the second slide rail (41), and the second limiting column (434) is arranged on the second built-in plate (431) for abutting against the second elastic top block (44); the second external plate (432) is arranged in a close fit on the lower side of the second slide rail (41), and the second adjusting bolt (433) passes through the second external plate (432) and the second slide groove (41a) in sequence, and the second adjusting bolt (433) is threadedly connected to the second built-in plate (431).

8. The cantilever structure according to claim 7, characterized in that: The second limiting assembly (43) further comprises a second displacement sensor (435), which is arranged on the second limiting column (434) and corresponds to the second elastic top block (44).

9. The cantilever structure according to claim 1, characterized in that: The lifting mechanism (50) comprises an intermediate connecting rod (51) and a lifting hoist (52); The upper end of the intermediate connecting rod (51) is movably connected to the second pulley (421), and the lower end of the intermediate connecting rod (51) is connected to the lifting hoist (52), and the lifting hoist (52) is used to connect the object to be lifted.

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