Crane with anti-tilt function for construction sites

Abstract

The present invention relates to the field of cranes, specifically a crane with an anti-tilt function for use on construction sites, comprising a crane and a hook connected to the crane, a lifting ring suspended on the lifting hook, a display panel sleeve connected to the lifting ring, a square guide frame slidably installed inside the display panel sleeve, the two ends of the square guide frame extending from the upper and lower ends of the display panel sleeve, an expansion fixture provided between the display panel sleeve and the square guide frame, a cross positioning frame fixedly installed at the lower end of the square guide frame, positioning guard plates extending from the four ends of the cross positioning frame, the positioning guard plate on one side being arranged at an angle. The present invention facilitates the lifting and transportation of a trolley and avoids the trolley from tilting during the lifting and transportation process, while also ensuring the service life of the trolley and ensuring that the cross positioning frame and the like will not be obstructed by the lifting splint when being hoisted into the next trolley.

Description

Technical Field

[0001] The present invention relates to the field of cranes, in particular to a crane with an anti-tilt function used in construction sites. Background Art

[0002] Cranes, as indispensable heavy machinery in modern industry, rely on diverse power systems such as electric motor drive and hydraulic transmission, combined with complex and sophisticated structural designs such as truss and box types, to build a three-dimensional material handling system in the fields of construction, manufacturing, and logistics. For example, port cranes, through the coordinated operation of their luffing, hoisting, and slewing mechanisms, can accurately load and unload tens of tons of containers in seconds. Crawler cranes in mines, with their powerful hydraulic systems, can complete the lifting and transportation of large mining trucks in rugged terrain. On construction sites, cranes are often used to lift and transport carts loaded with materials such as cement to meet the needs of construction.

[0003] However, when it comes to lifting carts loaded with cement, sand, and gravel to the work surface of a high-rise building, the traditional process presents significant drawbacks. Workers must first bend over to wrap a rough rope around the cart frame, then connect the rope to the crane hook before lifting and transporting. This process is quite cumbersome and makes lifting and transporting inconvenient. Furthermore, the cart is prone to tilting after being lifted, which can easily cause the material inside to spill. Summary of the Invention

[0004] The purpose of the present invention is to solve the shortcomings of the background technology and to propose a crane with an anti-tilt function for use on a construction site.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a crane with an anti-tilt function for use on a construction site, comprising a crane and a hook connected to the crane, a lifting ring being hung on the lifting hook, a display panel sleeve being connected to the lifting ring, a square guide frame being slidably installed inside the display panel sleeve, two ends of the square guide frame passing through the upper and lower ends of the display panel sleeve, an expansion fastener being provided between the display panel sleeve and the square guide frame, a cross positioning frame being fixedly installed at the lower end of the square guide frame, and positioning guards extending from the four ends of the cross positioning frame. The plate is arranged at an angle, and the upper end of the positioning guard plate on the other side is symmetrically extended with two hanging ears. The four sides of the display panel cover are connected with pulling brackets, and the lower ends of the four pulling brackets are connected with hook-shaped frames, and the hook-shaped frames are slidably connected to the cross positioning frames. The hook-shaped ends of the four hook-shaped frames are extended with lifting splints, and the four lifting splints are respectively aligned with the four positioning guard plates, and the lifting splints are parallel to the positioning guard plates, and the four positioning guard plates match the inner wall of the trolley.

[0006] Preferably, door hangers are fixedly mounted on the upper portions of the front and rear ends of the display panel cover, and a hanging shaft is provided through the middle portion of the upper end of the door hanger. The hanging shaft is in contact with the door hanger, and the upper end of the hanging shaft is fixed to the lower end of the hanging ring. The door hanger serves to connect the display panel cover and the hanging ring, and the hanging shaft serves to enable the door hanger to rotate.

[0007] Preferably, a lower limiting cap is coaxially embedded in the lower portion of the outer surface of the hanging shaft, and the lower limiting cap is in contact with the inner top surface of the door hanger. An upper limiting cap is coaxially embedded in the upper portion of the outer surface of the hanging shaft, and the upper limiting cap is in contact with the upper end surface of the door hanger. The lower limiting cap and the upper limiting cap function to prevent separation of the door hanger and the hanging shaft.

[0008] Preferably, the front and rear ends of the door hanger are each provided with a connecting plate. Threaded studs are provided through both ends of the connecting plate. The ends of the threaded studs are fixed to the door hanger. Nuts are screwed onto the outer surfaces of the threaded studs, which are pressed against the connecting plate. A counterweight ball is fixedly mounted in the middle of the connecting plate. The connecting plate supports the counterweight ball, and the threaded studs and nuts secure the connecting plate to the door hanger.

[0009] Preferably, a guide sleeve is slidably mounted on the outer surface of the hook-shaped frame, the lower end of the guide sleeve being fixed to the cross positioning frame, an anti-slip cap extending from the upper end of the square guide frame, and four counterweights are evenly distributed near the middle of the upper end of the cross positioning frame. Hoop plates engage the upper ends of the counterweights and the lower end of the cross positioning frame, and bolts are provided through the ends of both hoop plates. The guide sleeve guides the hook-shaped frame, the anti-slip cap prevents separation of the square guide frame and the display panel sleeve, and the hoop plates and bolts secure the counterweights to the cross positioning frame.

[0010] Preferably, the four hook-shaped frames are each provided with a lower connecting shaft embedded therethrough at the opposite ends thereof, the lower end of the pull-hanging frame being rotatably mounted on the outer surface of the lower connecting shaft, the upper end of the pull-hanging frame being provided with an upper connecting shaft embedded therethrough, the middle portion of the outer surface of the upper connecting shaft being provided with an upper rack claw rotatably mounted thereon, the end of the upper rack claw being fixed to the display panel sleeve. The lower connecting shaft serves to facilitate the connection between the hook-shaped frame and the pull-hanging frame, while the upper connecting shaft and the upper rack claw serve to facilitate the connection between the pull-hanging frame and the display panel sleeve.

[0011] Preferably, the expansion fixture includes two protruding shells that are embedded in the upper parts of both sides of the expansion plate sleeve, and fixed plate angles are slidably installed inside the two protruding shells. The two fixed plate angles are respectively pressed against the two sides of the square guide frame, and the lower ends of the fixed plate angles are inclined near the corners of the square guide frame. A locking groove is provided on the upper part of the outer surface of the square guide frame, and a release guide block is slidably installed on the lower inner part of the locking groove. The protruding shell plays the role of supporting the fixed plate angle, which can facilitate the side movement of the fixed plate angle to pass through the upper part of the release guide block, so that the end of the fixed plate angle can be against the lower inclined surface of the release guide block. When the four lifting splints are unfolded, the fixed plate angle on the expansion plate cover just moves to the locking groove, and then the fixed plate angle extends out under the push of the push angle spring to be stuck at the upper edge of the locking groove, so that the lifting splint remains in the unfolded state, so that the subsequent cross positioning frame and the like will not be hindered by the lifting splint when being hung in the next trolley. The releasing guide block can allow the fixed plate angle to disengage from the locking groove by itself, so that the expansion plate cover can drive the four lifting splints to move toward each other and hold them tightly on the four outer walls of the trolley.

[0012] Preferably, a limiting post extends from the side of the fixed plate angle, one end of which extends through the end of the extension shell. The limiting post is slidably engaged with the extension shell, one end of which is inlaid with a post cap, and an angle-pushing spring is wound around the outside of the limiting post. One end of the angle-pushing spring is fixed to the fixed plate angle, and the other end of the angle-pushing spring is fixed to the inner side of the extension shell. The limiting post prevents the angle-pushing spring from bending, and the angle-pushing spring pushes the fixed plate angle.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. When the crane drives the cross positioning frame downward, it can allow the cross positioning frame to enter the interior of the trolley. At this time, the positioning guard plate fits on the inner walls of the trolley, and the hanging ear presses on the upper end of the trolley for positioning. Then the crane drives the hook upward for lifting. At this time, the cross positioning frame remains stationary under the counterweight of the counterweight block, and the display panel cover slides upward on the square guide frame under the lifting of the hook, thereby driving the pulling frame to pull the hook frame, so that the four lifting splints move toward each other to hug the outer walls of the trolley and fix it. At this time, the lifting splint is restricted by the trolley and cannot continue to move. Then continue to lift the display panel cover to make the display panel The sleeve and the square guide frame can move upward synchronously, thereby lifting the fixed trolley for lifting and transportation. The trolley can be automatically fixed during the process, and there is no need for workers to fix it manually, which effectively facilitates lifting and transportation. At the same time, under the action of four positioning guards, the lifting position can be positioned so that it can be lifted from the center of the trolley to avoid the trolley from tilting during the lifting and transportation process. When the lifting splint is tightly clamped on the outer wall of the trolley, the positioning guard will support the lifting splint from the inner wall of the trolley to reduce the force on the trolley box to avoid deformation and damage due to excessive clamping force, thereby ensuring the service life of the trolley.

[0015] 2. After the trolley is lifted and transported to the designated location, it can be lowered to the ground. At this time, the hook continues to move downward, and the display panel slides down on the square guide frame under the counterweight of the counterweight ball, thereby driving the pull-hanging frame to move, allowing the four lifting splints to unfold to loosen the fixation of the trolley. This process can automatically release the fixed trolley after lifting and transporting, further facilitating lifting and transporting. When the four lifting splints are unfolded, the fixed plate angle on the display panel just moves to the locking groove, and then the fixed plate angle extends out under the push of the push angle spring to be stuck at the upper edge of the locking groove, so that the lifting splints remain in the unfolded state, so that the subsequent cross positioning frame will not be hindered by the lifting splint when it is hung in the next trolley. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of a crane with an anti-tilt function for use at a construction site according to the present invention;

[0017] Figure 2 This is a schematic diagram of a hook of a crane with an anti-tilt function for use at a construction site according to the present invention;

[0018] Figure 3 The present invention is a crane with anti-tilt function for use on construction sites Figure 2 A magnified view of middle A;

[0019] Figure 4 The present invention is a crane with anti-tilt function for use on construction sites Figure 2 Enlarged view of middle B;

[0020] Figure 5 This is a schematic diagram of a counterweight ball of a crane with an anti-tilt function for use at a construction site according to the present invention;

[0021] Figure 6 This is a cross-sectional view of the display panel cover of a crane with an anti-tilt function for use at a construction site according to the present invention;

[0022] Figure 7 This is a schematic diagram of a square guide frame of a crane with an anti-tilt function for use at a construction site according to the present invention;

[0023] Figure 8 This is a view of a crane with an anti-tilt function for use at a construction site according to the present invention;

[0024] Figure 9 The present invention is a schematic diagram of a trolley of a crane with an anti-tilt function for use at a construction site.

[0025] In the accompanying drawings, the list of parts represented by each reference number is as follows: 1. Crane; 2. Hook; 3. Lifting ring; 4. Counterweight ball; 5. Door hanger; 6. Square guide frame; 7. Cross positioning frame; 8. Pull hanger; 9. Guide sleeve; 10. Positioning guard plate; 11. Lifting splint; 12. Hook frame; 13. Anti-slip cap; 14. Extending shell; 15. Display board cover; 16. Shelf claw; 17. Limiting column; 18. Fixed plate angle; 19. Push angle spring; 20. Locking slot; 21. Release guide block; 22. Hanging ear; 23. Counterweight block; 24. Bolt; 25. Clamp plate; 26. Lower connecting shaft; 27. Connecting plate; 28. Threaded column; 29. ​​Nut; 30. Lower limiting cap; 31. Hanging shaft; 32. Upper limiting cap; 33. Upper connecting shaft; 34. Column cap; 35. Trolley. DETAILED DESCRIPTION

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0027] The present invention provides a technical solution: Figures 1-9The crane with anti-tilt function for use at a construction site shown in the figure comprises a crane 1 and a hook 2 connected to the crane 1, a lifting ring 3 is hung on the lifting hook 2, a display panel cover 15 is connected to the lifting ring 3, a square guide frame 6 is slidably installed inside the display panel cover 15, the display panel cover 15 plays the role of driving the pull hanger 8 to move, the two ends of the square guide frame 6 pass through the upper and lower ends of the display panel cover 15, an expansion fixture is provided between the display panel cover 15 and the square guide frame 6, and the square guide frame 6 plays the role of allowing the display panel cover 15 to move vertically The lower end of the square guide frame 6 is fixedly mounted with a cross positioning frame 7, and the four ends of the cross positioning frame 7 are extended with positioning guard plates 10. The cross positioning frame 7 plays the role of carrying the positioning guard plates 10. The positioning guard plates 10 on one side are tilted and can adapt to the inner wall slope of the trolley 35. The upper end of the positioning guard plate 10 on the other side is symmetrically extended with two hanging ears 22. The hanging ears 22 can be pressed on the upper end of the trolley 35 to prevent the cross positioning frame 7 from falling. The four hook frames 12 are connected to the pull-up brackets 8 on all sides, and the lower ends of the four pull-up brackets 8 are connected to the hook-shaped brackets 12. The pull-up brackets 8 play the role of driving the hook-shaped brackets 12 to move. The hook-shaped brackets 12 are slidably connected to the cross positioning bracket 7. The hook-shaped ends of the four hook frames 12 are extended with lifting splints 11. The four lifting splints 11 are aligned with the four positioning guard plates 10 respectively. The lifting splints 11 are arranged in parallel with the positioning guard plates 10. When the lifting splints 11 are tightly held on the outer wall of the trolley 35, the positioning guard plates 10 will move from the The inner wall of the trolley 35 supports the lifting splint 11 to reduce the force on the box of the trolley 35 to avoid deformation and damage due to excessive clamping force. The four positioning guard plates 10 match the inner wall of the trolley 35, which can ensure that the four positioning guard plates 10 are fitted on the inner wall of the trolley 35 for positioning, thereby locating the lifting position so that it can be lifted from the center of the trolley 35 to avoid the trolley 35 from tilting during the lifting and transportation process.

[0028] The door hanger 5 is fixedly installed on the upper part of the front and rear ends of the display panel cover 15. A hanging shaft 31 is provided through the middle part of the upper end of the door hanger 5. The door hanger 5 serves to connect the display panel cover 15 and the hanging ring 3. The hanging shaft 31 fits with the door hanger 5, and the upper end of the hanging shaft 31 is fixed to the lower end of the hanging ring 3. The hanging shaft 31 enables the door hanger 5 to rotate.

[0029] A lower limiting cap 30 is coaxially embedded in the lower part of the outer surface of the hanging shaft 31, and the lower limiting cap 30 is fitted to the inner top surface of the door hanger 5. An upper limiting cap 32 is coaxially embedded in the upper part of the outer surface of the hanging shaft 31, and the upper limiting cap 32 is fitted to the upper end surface of the door hanger 5. The lower limiting cap 30 and the upper limiting cap 32 prevent the door hanger 5 and the hanging shaft 31 from separating.

[0030] Connecting plates 27 are provided on the upper parts of the front and rear ends of the door hanger 5. Threaded columns 28 are provided at both ends of the connecting plates 27. The connecting plates 27 serve to carry the counterweight ball 4. The ends of the threaded columns 28 are fixed to the door hanger 5. Nuts 29 are tightened on the outer surfaces of the threaded columns 28. The threaded columns 28 and the nuts 29 serve to fix the connecting plates 27 to the door hanger 5. The nuts 29 are pressed against the connecting plates 27. The counterweight ball 4 is fixedly installed in the middle of the connecting plates 27.

[0031] A guide sleeve 9 is slidably installed on the outer surface of the hook frame 12, and the lower end of the guide sleeve 9 is fixed to the cross positioning frame 7. The guide sleeve 9 guides the hook frame 12. An anti-slip cap 13 is extended from the upper end of the square guide frame 6. The anti-slip cap 13 prevents the square guide frame 6 from separating from the display board sleeve 15. Four counterweights 23 are evenly distributed near the middle of the upper end of the cross positioning frame 7. The upper end of the counterweight 23 and the lower end of the cross positioning frame 7 are both engaged with a hoop piece 25. Bolts 24 are passed through the ends of the two hoop pieces 25. The hoop piece 25 and the bolt 24 fix the counterweight 23 to the cross positioning frame 7.

[0032] The opposite ends of the four hook-shaped frames 12 are penetrated and inlaid with a lower connecting shaft 26, and the lower end of the pulling and hanging frames 8 is rotatably mounted on the outer surface of the lower connecting shaft 26. The lower connecting shaft 26 serves to facilitate the connection between the hook-shaped frames 12 and the pulling and hanging frames 8. The upper end of the pulling and hanging frames 8 is penetrated and inlaid with an upper connecting shaft 33. The middle part of the outer surface of the upper connecting shaft 33 is rotatably mounted with an upper frame claw 16. The upper connecting shaft 33 and the upper frame claw 16 serve to facilitate the connection between the pulling and hanging frames 8 and the display panel cover 15. The end of the upper frame claw 16 is fixed to the display panel cover 15.

[0033] The expansion fixture includes two protruding shells 14 that are embedded in the upper parts of both sides of the expansion plate sleeve 15. Fixed plate angles 18 are slidably installed inside the two protruding shells 14. The protruding shells 14 play the role of supporting the fixed plate angles 18. The two fixed plate angles 18 are respectively pressed against the two sides of the square guide frame 6. The lower ends of the fixed plate angles 18 are inclined near the corners of the square guide frame 6, which can facilitate the side movement of the fixed plate angles 18 to pass through the upper part of the release guide block 21, so that the ends of the fixed plate angles 18 can be pressed against the lower inclined surface of the release guide block 21. A locking groove 20 is provided on the upper outer surface of the square guide frame 6. When the four lifting splints 11 are unfolded, When the trolley 35 is lifted, the fixed plate angle 18 on the display panel cover 15 just moves to the locking groove 20, and then the fixed plate angle 18 is extended under the push of the push angle spring 19 to be stuck at the upper edge of the locking groove 20, so that the lifting splint 11 remains in the expanded state, so that when the subsequent cross positioning frame 7 is lifted and placed in the next trolley 35, it will not be hindered by the lifting splint 11. A release guide block 21 is slidably installed on the inner lower part of the locking groove 20. The release guide block 21 can allow the fixed plate angle 18 to disengage from the locking groove 20 by itself, so that the display panel cover 15 can drive the four lifting splints 11 to move toward each other and hold them tightly on the outer walls of the trolley 35.

[0034] A limiting column 17 extends from the side of the fixed plate angle 18, and one end of the limiting column 17 passes through the end of the protruding shell 14. The limiting column 17 prevents the pushing angle spring 19 from bending. The limiting column 17 slides with the protruding shell 14, and one end of the limiting column 17 is inlaid with a column cap 34. The outside of the limiting column 17 is wrapped with a pushing angle spring 19, and one end of the pushing angle spring 19 is fixed to the fixed plate angle 18. The pushing angle spring 19 pushes the fixed plate angle 18, and the other end of the pushing angle spring 19 is fixed to the inner side of the protruding shell 14.

[0035] During lifting and transportation, after the trolley 35 is lifted and transported to the designated position, it can be lowered to the ground. At this time, the hook 2 continues to move downward, and the display panel cover 15 slides downward on the square guide frame 6 under the counterweight of the counterweight ball 4, thereby driving the pull hanger 8 to move, allowing the four lifting splints 11 to unfold to loosen the fixation of the trolley 35. When the four lifting splints 11 are unfolded, the fixed plate angle 18 on the display panel cover 15 just moves to the locking groove 20, and then the fixed plate angle 18 extends out under the push of the push angle spring 19 to be stuck at the upper edge of the locking groove 20, so that the lifting splint 11 remains in the unfolded state, so that the subsequent cross positioning frame 7, etc. will not be hindered by the lifting splint 11 when being hung in the next trolley 35. Then the cross positioning frame 7, etc. can be hung on the next The crane 1 then drives the hook 2 to lift. At this time, the cross positioning frame 7 remains stationary under the counterweight of the counterweight block 23, and the display panel cover 15 is lifted by the hook 2. The trolley 35 is moved upwards by the fixed plate angle 18, and the fixed plate angle 18 is moved upwards by the fixed plate angle 18, so that the fixed plate angle 18 is disengaged from the locking groove 20 and is pressed against the surface of the square guide frame 6, so as to ensure that the trolley 35 can continue to slide upwards on the square guide frame 6, thereby driving the four lifting splints 11 to continue to move toward each other, so that the lifting splints 11 can be tightly held on the outer walls of the trolley 35 and fixed. The trolley 35 is restricted and cannot move further. Then the display panel cover 15 is continued to be pulled, so that the display panel cover 15 and the square guide frame 6 can be moved up synchronously, and then the fixed trolley 35 is lifted for lifting and transportation, and this cycle is repeated. At the same time, under the action of the four positioning guard plates 10, the lifting position can be positioned so that it can be lifted from the center of the trolley 35 to avoid the trolley 35 from tilting during the lifting and transportation process. When the lifting splint 11 is tightly clamped on the outer wall of the trolley 35, the positioning guard plate 10 will support the lifting splint 11 from the inner wall of the trolley 35, reducing the force on the box of the trolley 35 to avoid deformation and damage due to excessive clamping force, thereby ensuring the service life of the trolley 35.

[0036] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0037] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A crane with an anti-tilt function for use at a construction site, comprising a crane and a hook connected to the crane, characterized in that: The hook brackets are connected to the bottom ends of the lifting brackets, and the lifting brackets are connected with the bottom ends of the lifting brackets to form a lifting mechanism, and the lifting mechanism is connected with the bottom ends of the lifting bracket to form a lifting mechanism. The opposite ends of the four hook-shaped frames are penetrated and embedded with lower connecting shafts, the lower end of the pulling and hanging frame is rotatably mounted on the outer surface of the lower connecting shaft, the upper end of the pulling and hanging frame is penetrated and embedded with an upper connecting shaft, the middle part of the outer surface of the upper connecting shaft is rotatably mounted with an upper rack claw, and the end of the upper rack claw is fixed to the display board sleeve; The expansion fixture includes two protruding shells that are embedded in the upper parts of both sides of the expansion plate sleeve, and fixed plate angles are slidably installed inside the two protruding shells. The two fixed plate angles are respectively pressed against the two sides of the square guide frame, and the lower ends of the fixed plate angles are inclined near the corners of the square guide frame. A locking groove is provided on the upper part of the outer surface of the square guide frame, and a release guide block is slidably installed on the lower inner part of the locking groove.

2. A crane with an anti-tilt function for use at a construction site according to claim 1, characterized in that: The front and rear end upper parts of the display panel cover are fixedly mounted with door hangers, the middle part of the upper end of the door hanger is penetrated by a hanging shaft, the hanging shaft is fitted with the door hanger, and the upper end of the hanging shaft is fixed to the lower end of the hanging ring.

3. A crane with an anti-tilt function for use at a construction site according to claim 2, characterized in that: A lower limiting cap is coaxially embedded in the lower part of the outer surface of the hanging shaft, and the lower limiting cap is fitted to the inner top surface of the door hanger. An upper limiting cap is coaxially embedded in the upper part of the outer surface of the hanging shaft, and the upper limiting cap is fitted to the upper end surface of the door hanger.

4. The crane with anti-tilt function for use at a construction site according to claim 2, characterized in that: The upper parts of the front and rear ends of the door hanger are both provided with connecting plates, and threaded columns are provided at both ends of the connecting plates. The ends of the threaded columns are fixed to the door hanger, and nuts are screwed on the outer surfaces of the threaded columns. The nuts are pressed against the connecting plates, and a counterweight ball is fixedly installed in the middle of the connecting plate.

5. The crane with anti-tilt function for use at a construction site according to claim 1, characterized in that: A guide sleeve is slidably mounted on the outer surface of the hook-shaped frame, the lower end of the guide sleeve is fixed to the cross positioning frame, an anti-drop cap is extended from the upper end of the square guide frame, four counterweights are evenly distributed near the middle of the upper end of the cross positioning frame, the upper end of the counterweight and the lower end of the cross positioning frame are both engaged with a clamping plate, and bolts are passed through the ends of the two clamping plates.

6. The crane with anti-tilt function for use at a construction site according to claim 1, characterized in that: A limiting column extends from the side of the fixed plate angle, one end of the limiting column passes through the end of the protruding shell, the limiting column and the protruding shell are slidably fitted, one end of the limiting column is inlaid with a column cap, and a pushing angle spring is wound around the outside of the limiting column, one end of the pushing angle spring is fixed to the fixed plate angle, and the other end of the pushing angle spring is fixed to the inner side of the protruding shell.

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