A cantilever crane

Abstract

The utility model belongs to hoisting equipment technical field provides a kind of cantilever crane, including stand, cantilever beam, drive mechanism, locking mechanism, trolley and hoist mechanism.Cantilever beam is transversely moved and is arranged on the upper end of stand, drive mechanism is used to drive cantilever beam transversely moves, locking mechanism is used to lock cantilever beam with stand, trolley is slidably arranged on cantilever beam along the length direction of cantilever beam.Hoist mechanism is arranged on the lower end of trolley.The utility model makes cantilever beam horizontal transverse on the upper end of stand, so that the both ends of cantilever beam are on the both sides of stand, so that the both ends of cantilever are balanced to some extent, after hoisting object, the object below the shorter end of cantilever beam and trolley are close to stand, and the longer end of cantilever beam is located on the other side of stand, and the end of longer cantilever beam plays the effect of balance, so that the inclination of whole cantilever beam is inhibited, so that the height of hoisted object meets expectation.

Description

Technical Field

[0001] This utility model relates to the field of lifting equipment technology, specifically to a cantilever crane. Background Technology

[0002] Currently, the column-mounted cantilever cranes commonly used in industrial sites mainly consist of a column, a cantilever beam, a single electric or manual trolley, and a lifting mechanism. The trolley moves laterally on the cantilever beam, while the hoisting mechanism independently handles the raising and lowering of the slings.

[0003] In practice, it has been found that the bending moment when lifting an object varies depending on the distance the lifting mechanism moves laterally away from the column as the pulley moves on the cantilever beam. This causes the cantilever beam to tilt slightly as a whole, resulting in the object being lifted not meeting the required lifting height. Utility Model Content

[0004] In view of the shortcomings of the prior art, the present invention provides a cantilever crane, which can solve or at least alleviate one or more of the above-mentioned problems and other problems existing in the prior art.

[0005] This utility model provides a cantilever crane, comprising:

[0006] A column, the lower end of which is used to fix it to the ground;

[0007] A cantilever beam, which is laterally movable and located at the upper end of the column;

[0008] A drive mechanism is used to drive the cantilever beam to move laterally;

[0009] A locking mechanism for locking the cantilever beam to the column;

[0010] A trolley, which is slidably mounted on the cantilever beam along its length; and

[0011] A lifting mechanism is provided on the lower end of the trolley and is used to lift objects.

[0012] Preferably, there are two pulleys; and there are two lifting mechanisms corresponding to the pulleys.

[0013] Preferably, the column comprises:

[0014] A column, the lower end of which is fixed to the ground, and a mounting ring is rotatably fitted around the outside of the column, the mounting ring having multiple pull holes arranged circumferentially; and

[0015] Mounting bracket, the lower end of which is rotatably connected to the upper end of the column;

[0016] The hook of the lifting mechanism can be hooked into the pull hole of the mounting ring; the cantilever beam is laterally movable on the frame.

[0017] Preferably, the cantilever beam has a mounting cavity extending along its length; the lower end of the cantilever beam has a strip-shaped hole extending along its length; the strip-shaped hole communicates with the mounting cavity; a drive rod is disposed in the mounting cavity; the drive rod is arranged along the length of the cantilever beam.

[0018] The trolley includes:

[0019] A slider, which is slidably fitted onto the drive rod through an opening;

[0020] A connecting block, the upper end of which passes through the strip hole and connects to the slider, and the lower end of which connects to the lifting mechanism;

[0021] The rollers are provided in multiple ways, and the multiple rollers are respectively connected to both sides of the slider, with the lower end of the rollers abutting against the inner wall of the mounting cavity;

[0022] A drive sleeve, one end of which is rotatably connected to the slider, the drive sleeve being sleeved on the outside of the drive rod, and the inner wall of the drive sleeve being threadedly connected to the outer wall of the drive rod;

[0023] A first pulley is sleeved on the drive sleeve;

[0024] A second pulley, rotatably mounted on the connecting block, is connected to the first pulley via a belt; and

[0025] A first motor is connected to the first connecting block, and the output end of the first motor is coaxially connected to the second pulley.

[0026] Preferably, the upper end of the column is connected to a mounting plate; the mounting plate has a downwardly extending mating hole;

[0027] The mounting bracket includes:

[0028] A rotating column, the lower end of which is rotatably connected to the mating hole;

[0029] A C-shaped frame, the lower end of which is connected to the upper end of the rotating column; and

[0030] A limiting block is provided, which is connected to the lower end of the C-shaped frame, and a limiting hole is provided on the limiting block that extends vertically through it;

[0031] The cantilever crane also includes:

[0032] A first hydraulic cylinder, connected to the limiting block, wherein the output end of the first hydraulic cylinder can pass through the limiting hole; and

[0033] A stop block is connected to the output end of the first hydraulic cylinder, and the stop block can abut against the upper end of the mounting plate;

[0034] The cantilever beam is laterally slidably connected to the upper end of the C-frame; the lifting mechanism can pass laterally through the opening of the C-frame.

[0035] Preferably, the C-frame includes:

[0036] A first mounting block, one end of which is connected to the rotating column, and the other end of which extends laterally;

[0037] The second mounting block has its lower end connected to the end of the first mounting block away from the rotating column;

[0038] A third mounting block, one end of which is connected to the upper end of the second mounting block, and the other end of which extends laterally, is located directly above the first mounting block. A transversely penetrating sliding hole is formed at the end of the third mounting block away from the second mounting block, and a laterally extending clearance groove is formed on the lower side of the end of the third mounting block away from the second mounting block, and the clearance groove communicates with the sliding hole.

[0039] The first roller is provided in multiple ways, and the first roller is rotatably disposed on two opposite sides of the sliding hole in the horizontal direction and on the lower side of the sliding hole.

[0040] The cantilever beam passes through the sliding hole and contacts the first roller.

[0041] Preferably, it further includes a second roller, which is rotatably disposed on the upper inner wall of the sliding hole; the upper side of the cantilever beam abuts against the second roller.

[0042] Preferably, the end of the third mounting block opposite to the second mounting block is provided with a first locking hole; and a plurality of second locking holes are provided on the side of the cantilever beam corresponding to the first locking hole, distributed along its length.

[0043] The locking mechanism includes:

[0044] A locking pin, the end of which slides through the first locking hole and is inserted into the second locking hole; and

[0045] The second hydraulic cylinder is fixedly connected to the end of the third mounting block, and the output end of the second hydraulic cylinder is coaxially connected to the end of the locking pin.

[0046] Preferably, the cantilever beam is provided with a rack along its length; the upper side of the end of the third mounting block away from the second mounting block is provided with a through drive groove;

[0047] The drive mechanism includes:

[0048] A power shaft, which is rotatably mounted on the end of the third mounting block;

[0049] A gear, coaxially connected to the drive shaft, the lower end of which passes through the drive groove and meshes with the rack; and

[0050] The second motor is connected to the third mounting block, and the output end of the second motor is coaxially connected to the power shaft.

[0051] Preferably, baffles are provided at both ends of the cantilever beam; the baffles can abut against the third mounting block.

[0052] Compared with the prior art, the present invention has the following beneficial effects:

[0053] In this invention, the cantilever beam is horizontally moved across the top of the column, so that both ends of the cantilever beam are on either side of the column. This allows the two ends of the cantilever beam to be balanced to a certain extent. After the object is lifted, the object and the trolley below the shorter end of the cantilever beam are close to the column, while the longer end of the cantilever beam is on the other side of the column. The longer end of the cantilever beam has a balancing effect, thereby suppressing the tilt of the entire cantilever beam and ensuring that the height of the lifted object meets expectations. Attached Figure Description

[0054] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0055] Figure 1 This is a schematic diagram of the structure of a cantilever crane according to one embodiment of the present invention;

[0056] Figure 2 for Figure 1 Enlarged view of point A (without cover);

[0057] Figure 3 for Figure 2 Enlarged view at point B in the middle;

[0058] Figure 4 for Figure 1 3D view of the cantilever beam;

[0059] Figure 5 for Figure 4 Enlarged view at point C;

[0060] Figure 6 for Figure 5 A three-dimensional view of the cantilever beam (left view);

[0061] Figure 7 for Figure 5 A 3D view of the interaction between the drive rod and the slider.

[0062] Figure label:

[0063] 10. Column; 11. Column body; 12. Mounting bracket; 13. Mounting ring; 14. Mounting plate; 15. Rotating column; 16. C-shaped frame; 161. First mounting block; 162. Second mounting block; 163. Third mounting block; 164. Sliding hole; 165. Clearance groove; 166. First roller; 167. Second roller; 168. Drive groove; 17. Limiting block;

[0064] 20. Cantilever beam; 21. Mounting cavity; 22. Strip hole; 23. Drive rod; 24. Rack;

[0065] 30. Drive mechanism; 31. Power shaft; 32. Gear; 33. Second motor;

[0066] 40. Locking mechanism; 41. Locking pin; 42. Second hydraulic cylinder;

[0067] 50. Pulley; 51. Slider; 52. Connecting block; 53. Roller; 54. Drive sleeve; 55. First pulley; 56. Second pulley; 57. First motor;

[0068] 60. Lifting mechanism;

[0069] 70. First hydraulic cylinder; 71. Stop block;

[0070] 80. Baffle. Detailed Implementation

[0071] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0072] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application shall have the ordinary meaning as understood by one of ordinary skill in the art to which this utility model pertains.

[0073] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0074] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly defined.

[0075] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0076] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0077] See Figures 1 to 7 This embodiment provides a cantilever crane, including a column 10, a cantilever beam 20, a drive mechanism 30, a locking mechanism 40, a trolley 50, and a lifting mechanism 60.

[0078] The lower end of the column 10 is fixed to the ground. A cantilever beam 20 is laterally movable at the upper end of the column 10. A drive mechanism 30 drives the cantilever beam 20 to move laterally. A locking mechanism 40 locks the cantilever beam 20 to the column 10. A trolley 50 is slidably mounted on the cantilever beam 20 along its length. A lifting mechanism 60 is mounted on the lower end of the trolley 50 and is used to lift objects.

[0079] In this embodiment, on the one hand, by horizontally moving the cantilever beam 20 at the upper end of the column 10, the two ends of the cantilever beam 20 are positioned on both sides of the column 10, thereby balancing the two ends of the cantilever itself to a certain extent and reducing the self-weight tilt caused by the cantilever beam 20 being located on one side of the column 10; on the other hand, the trolley 50 moves on the cantilever beam 20, and the cantilever beam 20 moves at the upper end of the column 10. After the object is lifted, the object below the shorter end of the cantilever beam 20 and the trolley 50 are close to the column 10, while the longer end of the cantilever beam 20 is located on the other side of the column 10. The longer end of the cantilever beam 20 plays a balancing role, thereby suppressing the tilt of the entire cantilever beam 20 and ensuring that the height of the lifted object meets expectations.

[0080] Second embodiment:

[0081] In this embodiment, two trolleys 50 are provided, and two lifting mechanisms 60 are provided corresponding to the trolleys 50. The lifting mechanisms 60 can adopt the structure of an electric hoist in the prior art.

[0082] In this embodiment, the arrangement of two trolleys 50 and two lifting mechanisms 60 serves two purposes. Firstly, each lifting mechanism 60 has two lifting points, enabling the lifting of eccentric or long objects. Secondly, the two lifting mechanisms 60 and two trolleys 50 can be located on either side of the column 10. When only one lifting mechanism 60 is used to lift an object, the other lifting mechanism 60 and trolley 50 can provide counterweight, balancing the trolleys 50 and lifting mechanisms 60 on both sides and further improving the tilt of the cantilever beam 20.

[0083] Third embodiment:

[0084] In this embodiment, the column 10 includes a column body 11 and a mounting bracket 12.

[0085] The lower end of the column 11 is fixed to the ground. A mounting ring 13 is rotatably fitted around the column 11, and the mounting ring 13 has multiple pull holes arranged circumferentially. Specifically, a mounting column is fitted over the column 11. The outer wall of the mounting column has an annular groove extending circumferentially. The mounting ring 13 is fitted over the annular groove and can slide within the annular groove, allowing the mounting ring 13 to rotate relative to the column 11. The lower end of the mounting bracket 12 is rotatably connected to the upper end of the column 11. The hook of the lifting mechanism 60 can be hooked into the pull holes of the mounting ring 13. The cantilever beam 20 is laterally movable on the frame.

[0086] In this embodiment, the lifting mechanism 60 below one trolley 50 releases the sling, and the hook at the lower end of the sling hooks the object for lifting; another trolley 50, together with the lifting mechanism 60, moves to the other side of the column 10, the hook of the lifting mechanism 60 hooks into the pull hole of the mounting ring 13 and tightens the sling, balancing the other side, thereby improving the lateral tilt of the cantilever.

[0087] Fourth embodiment:

[0088] In this embodiment, a mounting cavity 21 extending along the length direction is provided on the cantilever beam 20, and a strip-shaped hole 22 extending along the length direction is provided at the lower end of the cantilever beam 20. The strip-shaped hole 22 communicates with the mounting cavity 21, and a drive rod 23 is provided in the mounting cavity 21. The drive rod 23 is arranged along the length direction of the cantilever beam 20.

[0089] The trolley 50 includes a slider 51, a connecting block 52, a roller 53, a drive sleeve 54, a first pulley 55, a second pulley 56, and a first motor 57.

[0090] The slider 51 is slidably mounted on the drive rod 23 through the opening. The upper end of the connecting block 52 passes through the strip hole 22 and is connected to the slider 51. The lower end of the connecting block 52 is connected to the lifting mechanism 60. Multiple rollers 53 are provided, and the multiple rollers 53 are respectively connected to both sides of the slider 51. The lower end of the roller 53 abuts against the inner wall of the mounting cavity 21. One end of the drive sleeve 54 is rotatably connected to the slider 51. The drive sleeve 54 is sleeved on the outside of the drive rod 23, and the inner wall of the drive sleeve 54 is threadedly connected to the outer wall of the drive rod 23.

[0091] The first pulley 55 is sleeved on the outside of the drive sleeve 54, and the second pulley 56 is rotatably mounted on the connecting block 52. The second pulley 56 is connected to the first pulley 55 via a belt. The first motor 57 is connected to the first connecting block 52, and the output end of the first motor 57 is coaxially connected to the second pulley 56.

[0092] In this embodiment, driven by the first motor 57, the second pulley 56 drives the first pulley 55 to rotate via the belt, thereby causing the drive sleeve 54 to rotate outside the drive rod 23 and move along the length direction of the drive rod 23, thereby causing the slider 51 to move horizontally, and then moving the lifting mechanism 60 horizontally via the connecting block 52.

[0093] Fifth embodiment:

[0094] In this embodiment, the upper end of the column 11 is connected to the mounting plate 14; the mounting plate 14 has a mating hole that extends downwards on the column 11.

[0095] Mounting bracket 12 includes a rotating column 15, a C-shaped frame 16, and a limiting block 17.

[0096] The lower end of the rotating column 15 is rotatably connected to the mating hole. The lower end of the C-shaped frame 16 is connected to the upper end of the rotating column 15. The limiting block is connected to the lower end of the C-shaped frame 16, and a limiting hole with a vertical through-hole is provided on the limiting block 17.

[0097] The cantilever crane also includes a first hydraulic cylinder 70 and a stop block 71.

[0098] The first hydraulic cylinder 70 is connected to the limiting block 17, and the output end of the first hydraulic cylinder 70 can pass through the limiting hole. The stop block 71 is connected to the output end of the first hydraulic cylinder 70, and the stop block 71 can abut against the upper end of the mounting plate 14; the cantilever beam 20 is laterally slidably connected to the upper end of the C-shaped frame 16; the lifting mechanism 60 can laterally pass through the opening of the C-shaped frame 16. In addition, a cover is provided above the first hydraulic cylinder 70 to cover the lower end of the first hydraulic cylinder 70 and the C-shaped frame 16, so that when the lifting mechanism 60 passes, the slings and other equipment can slide smoothly over the cover.

[0099] In this embodiment, after the object is lifted, the pull rope on the lifting mechanism 60 can be manually dragged to make the object, along with the lifting mechanism 60 and the cantilever beam 20, rotate above the column 11. Furthermore, the first hydraulic cylinder 70 pushes the stop block 71 to abut against the mounting plate 14, thereby locking the C-frame 16 to the mounting plate. The C-frame 16 ensures that the cantilever beam 20 and the column 11 remain on the same plane.

[0100] Sixth embodiment:

[0101] In this embodiment, the C-frame 16 includes a first mounting block 161, a second mounting block 162, a third mounting block 163, and a first roller 166.

[0102] One end of the first mounting block 161 is connected to the rotating column 15, and the other end of the first mounting block 161 extends laterally. The lower end of the second mounting block 162 is connected to the end of the first mounting block 161 away from the rotating column 15.

[0103] One end of the third mounting block 163 is connected to the upper end of the second mounting block 162, and the other end of the third mounting block 163 extends laterally. The third mounting block 163 is located directly above the first mounting block 161. A horizontally penetrating sliding hole 164 is provided at the end of the third mounting block 163 away from the second mounting block 162. A laterally extending clearance groove 165 is provided on the lower side of the end of the third mounting block 163 away from the second mounting block 162, and the clearance groove 165 communicates with the sliding hole 164. Multiple first rollers 166 are provided, and the first rollers 166 are rotatably disposed on two opposite sides of the horizontal direction of the sliding hole 164 and on the lower side of the sliding hole 164. The cantilever beam 20 passes through the sliding hole 164 and contacts the first rollers 166. Multiple grooves are provided on the inner wall of the sliding hole 164, and positioning holes are opened at both ends of the grooves. The first roller 166 is disposed in the groove, and the two ends of the first roller 166 are connected to coaxial positioning pins. The positioning pins are clearance-fitted with the corresponding positioning holes, thereby realizing the rotation of the first roller 166 on the inner wall of the sliding hole 164. The first rollers 166 on the lower inner side of the sliding hole 164 are arranged in two rows, and the two rows of first rollers 166 are located on both sides of the relief groove 165.

[0104] In this embodiment, the cantilever beam 20 passes through the sliding hole 164. Under the support of the first roller 166, the cantilever beam 20 rolls and rubs against the first roller 166, so that the cantilever beam 20 can move easily in the sliding hole 164. When the slider 51 moves laterally on the cantilever beam 20, the connecting block 52 below the slider 51 can pass through the relief groove 165.

[0105] Seventh embodiment:

[0106] In this embodiment, the cantilever crane further includes a second roller 167, which is rotatably mounted on the upper inner wall of the sliding hole 164. Specifically, the rotatable connection between the second roller 167 and the inner wall of the sliding hole 164 can be referenced to the rotatable connection between the first roller 166 and the inner wall of the sliding hole 164. Two rows of second rollers 167 are provided, corresponding to the two rows of first rollers 166 below. The upper side of the cantilever beam 20 abuts against the second rollers 167.

[0107] In this embodiment, when most of the cantilever beam 20 moves to one side of the column 11, the entire cantilever beam 20 tilts slightly, thereby exerting pressure on the upper inner wall of the sliding hole 164. The setting of the second roller 167 allows the cantilever beam 20 to move smoothly laterally in the sliding hole 164.

[0108] Eighth embodiment:

[0109] In this embodiment, the end of the third mounting block 163 opposite to the end of the second mounting block 162 is provided with a first locking hole; the side of the cantilever beam 20 corresponding to the first locking hole is provided with a plurality of second locking holes distributed along its length direction.

[0110] The locking mechanism 40 includes a locking pin 41 and a second hydraulic cylinder 42.

[0111] The end of the locking pin 41 slides through the first locking hole and then inserts into the second locking hole. The end of the second hydraulic cylinder 42 is fixedly connected to the end of the third mounting block 163, and the output end of the second hydraulic cylinder 42 is coaxially connected to the end of the locking pin 41.

[0112] In this embodiment, the cantilever beam 20 moves in the sliding hole 164, and the second hydraulic cylinder 42 pushes the locking rod into the second locking hole on the cantilever beam 20 to achieve locking. When the lifting mechanism 60 lifts the object, the cantilever beam 20 can remain stationary.

[0113] Ninth embodiment:

[0114] In this embodiment, a rack 24 is provided on the cantilever beam 20 along its length. Specifically, the upper middle part of the cantilever beam 20 is recessed to form a mounting groove, and the rack 24 is laid in the mounting groove. The height of the rack 24 is lower than the upper outer wall of the cantilever beam 20, so that the rack 24 will not interfere with the second roller 167. A through drive groove 168 is provided on the upper side of the end of the third mounting block 163 away from the second mounting block 162.

[0115] The drive mechanism 30 includes a power shaft 31, a gear 32, and a second motor 33.

[0116] The drive shaft 31 is rotatably mounted on the end of the third mounting block 163. A gear 32 is coaxially connected to the drive shaft 31, and its lower end passes through the drive groove 168 and meshes with the rack 24. A second motor 33 is connected to the third mounting block 163, and its output end is coaxially connected to the drive shaft 31.

[0117] In this embodiment, the first motor 57, the second motor 33, the first hydraulic cylinder 70, and the second hydraulic cylinder 42 are all externally connected to a PLC controller, and the movement is controlled by the PLC controller. The second motor 33 and the second hydraulic cylinder 42 cooperate with each other during operation. While the second motor 33 drives the cantilever beam 20 to move via gear 32 and rack 24, the second hydraulic cylinder 42 drives the locking rod away from the second locking hole. When needed, the second motor 33 drives the cantilever beam 20 to move laterally to a certain position, and the second hydraulic cylinder 42 drives the locking rod to insert into the second locking hole for locking.

[0118] Tenth embodiment:

[0119] In this embodiment, baffles 80 are provided at both ends of the cantilever beam 20; the baffles 80 can abut against the third mounting block 163. By providing the baffles 80, the cantilever beam 20 can be prevented from detaching from the third mounting block 163.

[0120] Numerous specific details are set forth in this specification. However, it will be understood that embodiments of this invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0121] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A cantilever crane, characterized in that, include: A column (10), the lower end of which is used to fix it to the ground; A cantilever beam (20) is laterally movable and located at the upper end of the column (10); A drive mechanism (30) is provided for driving the cantilever beam (20) to move laterally. A locking mechanism (40) is used to lock the cantilever beam (20) to the column (10); A trolley (50) slidably disposed on the cantilever beam (20) along the length direction of the cantilever beam (20); and A lifting mechanism (60) is provided on the lower end of the trolley (50) and is used to lift objects.

2. A cantilever crane as described in claim 1, characterized in that, Two pulleys (50) are provided; two lifting mechanisms (60) are provided corresponding to the pulleys (50).

3. A cantilever crane as described in claim 2, characterized in that, The column (10) includes: A column (11), the lower end of which is fixed to the ground, a mounting ring (13) is rotatably sleeved on the outside of the column (11), and the mounting ring (13) has a plurality of pull holes arranged circumferentially; and Mounting bracket (12), the lower end of which is rotatably connected to the upper end of the column (11); The hook of the lifting mechanism (60) can be hooked into the pull hole of the mounting ring (13); the cantilever beam (20) is laterally movable on the frame.

4. A cantilever crane as described in claim 3, characterized in that, The cantilever beam (20) has an installation cavity (21) extending along its length; the lower end of the cantilever beam (20) has a strip hole (22) extending along its length; the strip hole (22) communicates with the installation cavity (21); a drive rod (23) is provided in the installation cavity (21); the drive rod (23) is arranged along the length of the cantilever beam (20); The pulley (50) includes: A slider (51) is slidably mounted on the drive rod (23) through an opening; The upper end of the connecting block (52) passes through the strip hole (22) and is connected to the slider (51), and the lower end of the connecting block (52) is connected to the lifting mechanism (60). Rollers (53), multiple rollers (53) are provided, and multiple rollers (53) are respectively connected to both sides of the slider (51), and the lower end of the rollers (53) abuts against the inner wall of the mounting cavity (21); A drive sleeve (54) is provided, one end of which is rotatably connected to the slider (51). The drive sleeve (54) is sleeved on the outside of the drive rod (23), and the inner wall of the drive sleeve (54) is threadedly connected to the outer wall of the drive rod (23). The first pulley (55) is sleeved on the outside of the drive sleeve (54); A second pulley (56) is rotatably mounted on the connecting block (52), and the second pulley (56) is connected to the first pulley (55) via a belt; and The first motor (57) is connected to the first connecting block (52), and the output end of the first motor (57) is coaxially connected to the second pulley (56).

5. A cantilever crane as described in claim 4, characterized in that, The upper end of the column (11) is connected to a mounting plate (14); the mounting plate (14) has a mating hole extending downward; The mounting bracket (12) includes: Rotating column (15), the lower end of which is rotatably connected to the mating hole; A C-shaped frame (16), the lower end of which is connected to the upper end of the rotating column (15); and A limiting block (17) is connected to the lower end of the C-shaped frame (16), and a limiting hole is provided on the limiting block (17) that extends vertically through it; The cantilever crane also includes: A first hydraulic cylinder (70) is connected to the limiting block (17), and the output end of the first hydraulic cylinder (70) can pass through the limiting hole; and Stop block (71), the stop block (71) is connected to the output end of the first hydraulic cylinder (70), and the stop block (71) can abut against the upper end of the mounting plate (14); The cantilever beam (20) is laterally slidably connected to the upper end of the C-frame (16); the lifting mechanism (60) can pass laterally through the opening of the C-frame (16).

6. A cantilever crane as described in claim 5, characterized in that, The C-frame (16) includes: A first mounting block (161) is connected at one end to the rotating column (15), and the other end of the first mounting block (161) extends laterally. The lower end of the second mounting block (162) is connected to the end of the first mounting block (161) away from the rotating column (15); A third mounting block (163), one end of which is connected to the upper end of the second mounting block (162), and the other end of which extends laterally. The third mounting block (163) is located directly above the first mounting block (161). A transversely penetrating sliding hole (164) is provided at the end of the third mounting block (163) away from the second mounting block (162). A laterally extending relief groove (165) is provided on the lower side of the end of the third mounting block (163) away from the second mounting block (162), and the relief groove (165) communicates with the sliding hole (164). First roller (166), multiple first rollers (166) are provided, and the first rollers (166) are rotatably disposed on two opposite sides of the horizontal direction of the sliding hole (164) and on the lower side of the sliding hole (164); The cantilever beam (20) passes through the sliding hole (164) and contacts the first roller (166).

7. A cantilever crane as described in claim 6, characterized in that, It also includes a second roller (167), which is rotatably disposed on the upper inner wall of the sliding hole (164); the upper side of the cantilever beam (20) abuts against the second roller (167).

8. A cantilever crane as described in claim 7, characterized in that, The third mounting block (163) has a first locking hole at the end opposite to the second mounting block (162); the cantilever beam (20) has a plurality of second locking holes distributed along its length on the side corresponding to the first locking hole. The locking mechanism (40) includes: A locking pin (41), the end of which slides through the first locking hole and is inserted into the second locking hole; and The second hydraulic cylinder (42) is fixedly connected to the end of the third mounting block (163), and the output end of the second hydraulic cylinder (42) is coaxially connected to the end of the locking pin (41).

9. A cantilever crane as described in claim 8, characterized in that, The cantilever beam (20) is provided with a rack (24) along its length; the third mounting block (163) has a through drive groove (168) on the upper side of the end away from the second mounting block (162); The drive mechanism (30) includes: The drive shaft (31) and the drive rod (23) are rotatably mounted on the end of the third mounting block (163); Gear (32), the gear (32) being coaxially connected to the drive shaft (31), the lower end of the gear (32) passing through the drive groove (168) and meshing with the rack (24); and The second motor (33) is connected to the third mounting block (163), and the output end of the second motor (33) is coaxially connected to the power shaft (31).

10. A cantilever crane as described in claim 9, characterized in that, The cantilever beam (20) is provided with baffles (80) at both ends; the baffles (80) can abut against the third mounting block (163).

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