Crane with cantilever adjusting mechanism

Abstract

The invention relates to the field of cranes, in particular to a crane with a cantilever adjusting mechanism, the crane comprises a stand column and a cantilever, one end of the cantilever is rotatably mounted at the top of the stand column through a rotating shaft, a trapezoidal supporting plate abutting against the outer side face of the stand column is mounted at the bottom of the cantilever, and an electric hoist is slidably mounted on the cantilever; a cantilever extension supporting mechanism is installed at the end, close to the rotating shaft, of the cantilever, a pipe fitting suspender cantilever is fixedly installed at the bottom of the cantilever, pipe fitting suspender grooves are formed in the left end and the right end of the bottom face of the pipe fitting suspender cantilever correspondingly, and a pipe fitting suspender screw block is installed in each pipe fitting suspender groove in a left-right sliding mode; a pipe fitting hanging rod is installed at the bottom of each pipe fitting hanging rod screw block in a hinged mode, and a pipe fitting limiting assembly is installed at the bottom end of each pipe fitting hanging rod. The pipe fitting can be clamped through the two pipe fitting limiting assemblies, so that the two ends of the pipe fitting are fixed, and the situation that one end of the pipe fitting warps upwards, the other end of the pipe fitting sinks or the pipe fitting horizontally rotates around the lifting hook when the pipe fitting is lifted is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of cranes, and in particular to a crane with a cantilever adjusting mechanism. Background Art

[0002] A suspension crane includes a column and a cantilever. The column is fixed on the ground. The cantilever is rotatably installed on the top of the column and can realize horizontal rotation with the column as the axis. An electric hoist is arranged under the cantilever to realize the lifting and moving of goods. It can realize the movement of goods within a certain range. Compared with other cranes, it is more flexible. Although this suspension crane has many advantages, it also has the following technical problems.

[0003] Firstly, the distance between the cantilever and the column of the current suspension crane is fixed and cannot be adjusted, that is, the crane can only lift goods within the movable range of the cantilever. When the goods are located outside the movable range of the cantilever due to loading and unloading reasons, the cantilever cannot lift or move them. The goods need to be moved under the cantilever before they can be lifted and moved, which has great limitations.

[0004] Secondly, when using a hook to lift goods, ropes are generally tied and knotted on the goods, and then the hook is used for lifting. However, when the goods to be moved are long single pipes (round pipes, square pipes), or multiple pipes bundled together, it is difficult to ensure that the ropes are tied in the middle of the pipes. Therefore, it is difficult to keep the pipes in a horizontal state. Multiple lifting and adjustment to the center position are required, and there are no obstructions at both ends of the pipes, resulting in one end of the pipes being tilted up and the other end being sunken when moving, or horizontal rotation with the hook as the axis. Therefore, there is a risk of the pipes falling off during the lifting and moving process, or hitting people due to the horizontal rotation of the pipes.

[0005] Therefore, based on the defects of the prior art, the present invention provides a crane with a cantilever adjustment mechanism to solve the above problems. Summary of the invention

[0006] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a crane with a cantilever adjustment mechanism to solve the problems raised in the above background technology.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is:

[0008] A crane with a cantilever adjustment mechanism comprises a column and a cantilever, one end of the cantilever is rotatably mounted on the top of the column through a rotating shaft, a trapezoidal support plate abutting against the outer side surface of the column is mounted at the bottom of the cantilever, an electric hoist is slidably mounted on the cantilever, a cantilever extension support mechanism is mounted at the end of the cantilever close to the rotating shaft, a pipe hanger cantilever is fixedly mounted at the bottom of the cantilever, pipe hanger grooves are provided at the left and right ends of the bottom surface of the pipe hanger cantilever, a pipe hanger screw block is slidably mounted in each of the pipe hanger grooves, a pipe hanger is hingedly mounted at the bottom of each of the pipe hanger screw blocks, and a pipe limiting assembly is mounted at the bottom of each of the pipe hanger rods.

[0009] Preferably, a rotating ring gear is coaxially fixedly installed on the outer surface of the column, a gear box with an opening on one side facing the column is fixedly installed on the bottom of the trapezoidal support plate, a rotating motor is fixedly installed on the bottom of the gear box, and the rotating shaft of the rotating motor passes through the gear box and is coaxially fixedly installed with a rotating gear meshing with the rotating ring gear.

[0010] Preferably, a hanger mounting plate is fixedly installed on both front and rear ends of the bottom surface of the pipe hanger screw block, a hanger shaft is fixedly installed between the two hanger mounting plates, the top end of the pipe hanger is rotatably installed on the hanger shaft, the top end of the pipe hanger is semicircular, and is equipped with an arc-shaped hanger flip rack, a hanger flip motor is fixedly installed on one end of the bottom surface of the pipe hanger screw block close to the middle of the pipe hanger cantilever, and a hanger flip worm gear meshing with the hanger flip rack is coaxially fixedly installed on the rotating shaft of the hanger flip motor.

[0011] Preferably, a flip limit groove is opened upwardly in the middle of the bottom surface of the pipe fitting hanger cantilever, and a flip limit plate groove is penetrated between the left and right side surfaces of the flip limit groove and the two pipe fitting hanger grooves, and each of the flip limit plate grooves is slidably installed with a flip limit plate, and the end surface of the flip limit plate located inside the pipe fitting hanger groove is installed with a flip limit tooth that can be plugged into the hanger flip worm gear. A flip limit block is slidably installed inside the flip limit groove, and the left and right sides of the bottom end of the flip limit block are provided with limiting block inclined surfaces, and one end of the two flip limit plates located inside the flip limit groove is provided with limiting plate inclined surfaces, a limiting spring is fixedly installed between the top of the flip limit block and the top of the flip limit groove, and the flip limit plate spring is fixedly connected between one end of the flip limit plate located inside the pipe fitting hanger groove and the side surface of the pipe fitting hanger groove.

[0012] Preferably, the cross-section of the cantilever is in the shape of an "I", and the electric hoist includes a "U"-shaped movable base, which is suspended at the bottom of the cantilever through movable wheels, and the left and right ends of the inner bottom surface of the movable base are provided with limit release inclined grooves, and the bottom of the flip limit block is fixedly connected to a flip limit release plate.

[0013] Preferably, a hanger adjustment screw is rotatably installed between the left and right ends of the pipe hanger cantilever, which passes through the two pipe hanger grooves and cooperates with the threads of the two pipe hanger screw blocks. The outer sides of the hanger adjustment screw are respectively provided with external threads located inside the two pipe hanger grooves, and the directions of the two external threads are opposite. A hanger adjustment motor connected to the hanger adjustment screw is fixedly installed at the right end of the pipe hanger cantilever.

[0014] Preferably, a screw limiting hole located above the hanger shaft is penetrated between the top and bottom surfaces of the screw block of the pipe hanging rod, a limiting spring hole is provided on the top surface of one end of the pipe hanging rod groove close to the middle of the pipe hanging rod cantilever, a screw limiting spring is installed in the limiting spring hole, a limiting release groove is provided on the top arc surface of the pipe hanging rod, a screw limiting pin is coaxially slidably installed in the screw limiting hole, and when the bottom end of the screw limiting pin abuts against the lower concave part of the limiting release groove, the top end of the screw limiting pin is located on the outside of the limiting spring hole.

[0015] Preferably, the pipe hanging rod comprises an inner hanging rod and an outer hanging rod, the top end of the inner hanging rod is rotatably connected to the hanging rod shaft, the hanging rod flip worm and the limit release groove are both arranged at the top end of the inner hanging rod, a hanging rod telescopic groove is provided on the end face of the top end of the outer hanging rod, the inner hanging rod is located inside the hanging rod telescopic groove, a telescopic screw hole is provided on the bottom end face of the inner hanging rod, a telescopic screw rod which cooperates with the telescopic screw hole thread is rotatably installed in the hanging rod telescopic groove, and a telescopic motor connected to the telescopic screw rod is installed at the bottom of the outer hanging rod.

[0016] Preferably, the pipe limiting assembly includes a pipe limiting disk, a limiting side ring, a pipe limiting slide groove, a pipe limiting screw block, a pipe limiting cone, a pipe limiting screw rod, and a pipe limiting motor;

[0017] A pipe limiting disk is fixedly installed on one side surface of the bottom end of the outer hanger toward the middle of the pipe hanger cantilever, and a limiting side ring is coaxially fixedly installed on the side surface of the pipe limiting disk toward the middle of the pipe hanger cantilever, a pipe limiting slide groove penetrates between the two side surfaces of the pipe limiting disk, a pipe limiting screw block is slidably installed in the pipe limiting slide groove, and a pipe limiting cone is fixedly installed on the side surface of the pipe limiting screw block toward the middle of the pipe hanger cantilever, and a pipe limiting screw rod that threadably cooperates with the pipe limiting screw rod is rotatably installed in the pipe limiting slide groove, and the top end of the pipe limiting screw rod penetrates to the top of the pipe limiting disk and is connected to a pipe limiting motor.

[0018] Preferably, the cantilever extension support mechanism comprises a cantilever extension seat, a cantilever extension slot, a cantilever extension plate, a cantilever extension screw hole, a cantilever extension lead screw, a cantilever support slide slot, a cantilever support screw block, a cantilever support rod, a cantilever support lead screw, an extension lead screw bevel gear, a support lead screw bevel gear, an extension motor, and an extension drive bevel gear;

[0019] A cantilever extension seat is fixedly installed on the outer surface of the rotating shaft, a cantilever extension slot is provided at one end of the cantilever extension seat away from the rotating shaft, a cantilever extension plate located in the cantilever extension slot is fixedly installed at the left end of the cantilever, a cantilever extension screw hole is provided on the left end surface of the cantilever extension plate, and a cantilever extension screw rod threadably matched with the cantilever extension screw hole is rotatably installed in the cantilever extension slot;

[0020] A cantilever support slot is provided on the inclined surface on the right side of the trapezoidal support plate, a cantilever support screw block is installed in the cantilever support slot, a cantilever support rod is hinged at the right end of the cantilever support screw block, the other end of the cantilever support rod is hinged at the bottom of the left end of the cantilever, and a cantilever support screw rod that cooperates with the cantilever support screw block thread is rotatably installed between the top and bottom surfaces of the cantilever support slot.

[0021] The beneficial effects of the present invention are:

[0022] 1. The cantilever extension support mechanism can extend the length of the cantilever, so that the goods beyond the original range of the cantilever can be lifted and moved to meet a larger range of use. When the length of the cantilever is extended, a more solid support structure can be provided for the cantilever.

[0023] 2. When the pipe hanging rod is not in use, it can be stored in the pipe hanging rod groove in a horizontal state. When it is needed, the pipe hanging rod can be flipped downward 90° to a vertical state. Then, the distance between the two pipe hanging rod screws can be adjusted according to the length of the pipe, so that the two pipe limiting assemblies can clamp the pipe, thereby fixing both ends of the pipe to avoid one end of the pipe being lifted up and the other end sinking, or horizontal rotation around the hook when the pipe is lifted.

[0024] 3. When the pipe hanger is not needed, the electric hoist needs to be moved along the cantilever. In order to prevent the pipe hanger from flipping downward and colliding or interfering with the electric hoist due to misoperation, the flipping limit tooth can be plugged into the spiral teeth on the outside of the hanger flip worm to prevent the hanger flip worm from rotating. This can prevent the pipe hanger from flipping downward and interfering with the electric hoist due to misoperation when the electric hoist is moved. When the pipe hanger is needed, the electric hoist can be moved to the middle of the pipe hanger cantilever, and driven by the flip limit block, the flipping limit tooth can be separated from the hanger flip worm, so that the two pipe hangers can be flipped 90° downward for use, thereby ensuring the safety of the equipment.

[0025] 4. When the pipe hanger is in the pipe hanger groove, the bottom end of the screw limit pin abuts against the side of the pipe hanger, and the top end of the screw limit pin enters into the limit spring hole, thereby limiting the pipe hanger screw. At this time, the pipe hanger screw will not be able to drive the pipe hanger to move; when the pipe hanger is flipped downward 90° to a vertical state, the bottom end of the screw limit pin can enter the limit release groove 38, and the top end of the screw limit pin is pushed outward by the screw limit spring, so that the screw limit pin is outside the limit spring hole. At this time, the distance between the two pipe hanger screws can be moved and adjusted.

[0026] 5. When lifting and moving a single pipe fitting, two pipe limiting cones can be inserted into both ends of the pipe fitting to fix and limit it, so as to prevent the pipe fitting from warping, sliding and horizontally rotating. When lifting and moving multiple pipe fittings bundled together, the position of the pipe limiting cone can be adjusted so that it can be inserted into both ends of any pipe fitting. The two ends of the bundled pipe fitting are placed on the inner side of the two limiting side rings. The two pipe limiting disks can block the two ends of multiple pipe fittings, which can not only prevent the bundled pipe fitting from warping at one end and sinking at the other end, but also the pipe limiting disk can prevent the risk of individual pipe fittings slipping, and can also limit its horizontal rotation from hitting other machines or personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a three-dimensional schematic diagram of the present invention.

[0028] Figure 2 It is a front view of the present invention.

[0029] Figure 3 It is the right side view of the present invention.

[0030] Figure 4 For the present invention Figure 3 Cross-section view at AA in the middle.

[0031] Figure 5 For the present invention Figure 3 Cross-section view at the middle BB.

[0032] Figure 6 For the present invention Figure 4 Enlarged view of point C in the middle.

[0033] Figure 7 It is an enlarged view of the movable substrate of the present invention when it leaves the middle part of the cantilever of the pipe hanger.

[0034] Figure 8 For the present invention Figure 5 Enlarged view of point D in the middle.

[0035] Fig. 9 For the present invention Figure 4 Enlarged view of point E in the middle.

[0036] Fig.10 It is a three-dimensional schematic diagram of the cantilever of the present invention when it is extended and the pipe hanging rod is moved out.

[0037] Fig.11 It is a front cross-sectional view of the cantilever of the present invention when it is extended and the pipe hanger is moved out.

[0038] Fig.12 It is a cross-sectional view of the pipe fitting hanger of the present invention when it is moved out and the pipe fitting limiting assembly is clamping the pipe fitting.

[0039] Fig.13 For the present invention Fig.12 Enlarged view of point F in the middle.

[0040] Fig.14 For the present invention Fig.12 Enlarged view of point G in the middle.

[0041] In the figure: 1, column; 2, cantilever; 3, rotating shaft; 4, trapezoidal support plate; 5, electric hoist; 6, cantilever extension support mechanism; 7, pipe hanger cantilever; 8, pipe hanger groove; 9, pipe hanger screw block; 10, pipe hanger; 11, pipe limit assembly; 12, rotating gear ring; 13, gear box; 14, rotating motor; 15, rotating gear; 16, hanger mounting plate; 17, hanger shaft; 18, hanger flip rack; 19. Boom flip motor; 20. Boom flip worm; 21. Flip limit slot; 22. Flip limit plate slot; 23. Flip limit plate; 24. Flip limit teeth; 25. Flip limit block; 26. Limit block inclined surface; 27. Limit plate inclined surface; 28. Limit spring; 29. ​​Limit plate spring; 30. Moving base plate; 31. Limit release inclined slot; 32. Flip limit release plate; 33. Boom adjustment screw; 34. Boom adjustment 35. Screw block limit hole; 36. Limit spring hole; 37. Screw block limit spring; 38. Limit release groove; 39. Screw block limit pin; 40. Inner suspension rod; 41. Outer suspension rod; 42. Suspension rod telescopic groove; 43. Telescopic screw hole; 44. Telescopic screw rod; 45. Telescopic motor; 46. Pipe fitting limit plate; 47. Limit side ring; 48. Pipe fitting limit slide; 49. Pipe fitting limit screw block; 50. Pipe fitting limit cone; 5 1. Pipe limiting screw rod; 52. Pipe limiting motor; 53. Cantilever extension seat; 54. Cantilever extension slot; 55. Cantilever extension plate; 56. Cantilever extension screw hole; 57. Cantilever extension screw rod; 58. Cantilever support slide groove; 59. Cantilever support screw block; 60. Cantilever support rod; 61. Cantilever support screw rod; 62. Extension screw rod bevel gear; 63. Support screw rod bevel gear; 64. Extension motor; 65. Extension drive bevel gear. DETAILED DESCRIPTION

[0042] The following will refer to the attached Figure 1-Figure 14Description Various embodiments of the present invention are described in detail.

[0043] A crane with a cantilever adjustment mechanism, as shown in the attached Figure 1-14 As shown, it includes a column 1 and a cantilever 2, the column 1 is fixedly installed on the ground by bolts, one end of the cantilever 2 is rotatably installed on the top of the column 1 through a rotating shaft 3, so that the cantilever 2 can rotate horizontally with the column 1 as the axis, and a trapezoidal support plate 4 abutting against the outer side of the column 1 is installed at the bottom of the cantilever 2, the inclined surface of the trapezoidal support plate 4 faces the cantilever 2, can support the cantilever 2, and can rotate horizontally synchronously with the cantilever 2, an electric hoist 5 is slidably installed on the cantilever 2, the electric hoist 5 is a prior art, and the model can be selected according to needs, and it is not repeated here, and a cantilever extension support mechanism 6 is installed at one end of the cantilever 2 close to the rotating shaft 3, and the cantilever extension support mechanism 6 can extend the length of the cantilever 2, so that the goods beyond the original range of the cantilever 2 can be lifted and moved, meeting a larger range of use, and when the length of the cantilever 2 is extended, a more solid support structure can be provided for the cantilever 2;

[0044] A pipe hanging rod cantilever 7 is fixedly installed at the bottom of the cantilever 2, and the pipe hanging rod cantilever 7 can rotate horizontally synchronously with the cantilever 2. Pipe hanging rod grooves 8 are opened at the left and right ends of the bottom surface of the pipe hanging rod cantilever 7, and a pipe hanging rod screw block 9 is slidably installed left and right in each of the pipe hanging rod grooves 8. A pipe hanging rod 10 is hingedly installed at the bottom of each of the pipe hanging rod screw blocks 9, and a pipe limiting component 11 is installed at the bottom end of each of the pipe hanging rods 10. When the pipe hanging rod 10 is not in use, it can be stored in the pipe hanging rod groove 8 in a horizontal state. When it is needed, the pipe hanging rod 10 can be flipped downward 90° to a vertical state, and then the spacing between the two pipe hanging rod screw blocks 9 can be adjusted according to the length of the pipe, so that the two pipe limiting components 11 can clamp the pipe, thereby fixing the two ends of the pipe, avoiding the situation where one end of the pipe is tilted up and the other end sinks, or rotates horizontally around the hook when the pipe is lifted.

[0045] As attached Figure 1 , Figure 2 , Fig. 9 As shown, a rotating ring gear 12 is coaxially fixedly installed on the outer surface of the column 1, a gear box 13 with an opening toward one side of the column 1 is fixedly installed on the bottom of the trapezoidal support plate 4, and a rotating motor 14 is fixedly installed on the bottom of the gear box 13. The rotating motor 14 is connected to a power supply and a controller. The rotating shaft of the rotating motor 14 passes through the gear box 13 and is coaxially fixedly installed with a rotating gear 15 meshing with the rotating ring gear 12. When the rotating motor 14 is started, it can drive the rotating gear 15 to rotate, and the rotating gear 15 meshes with the rotating ring gear 12, thereby driving the trapezoidal support plate 4 and the cantilever 2 to rotate horizontally. This is the structure used by the existing suspension crane.

[0046] As attached Figure 6-Figure 8 , Fig.12 , Fig.13 As shown, the front and rear ends of the bottom surface of the pipe hanging rod screw block 9 are fixedly installed with a hanging rod mounting plate 16, and a hanging rod shaft 17 is fixedly installed between the two hanging rod mounting plates 16. The top end of the pipe hanging rod 10 is rotatably installed on the hanging rod shaft 17, so that the pipe hanging rod 10 can be turned 90° with the hanging rod shaft 17 as the axis. The top end of the pipe hanging rod 10 is semicircular and is equipped with an arc-shaped hanging rod turning rack 18. The bottom surface of the pipe hanging rod screw block 9 is fixedly installed with a hanging rod turning motor 1 at one end near the middle of the pipe hanging rod cantilever 7. 9. The boom flipping motor 19 is connected to a power supply and a controller. A boom flipping worm 20 meshing with the boom flipping rack 18 is coaxially fixedly installed on the rotating shaft of the boom flipping motor 19. The boom flipping worm 20 can be driven to rotate forward and reverse by starting the boom flipping motor 19 in forward and reverse directions. The boom flipping worm 20 meshes with the boom flipping rack 18 for transmission, so that the pipe hanger 10 can be flipped downward 90° from the pipe hanger slot 8 to a vertical state for use, or flipped upward 90° to the pipe hanger slot 8 for storage and reset.

[0047] As attached Figure 6-Figure 8 , Fig.13 As shown, a flip limit groove 21 is opened upward in the middle of the bottom surface of the pipe hanging rod cantilever 7, and a flip limit plate groove 22 is penetrated between the left and right sides of the flip limit groove 21 and the two pipe hanging rod grooves 8, and a flip limit plate 23 is slidably installed in each of the flip limit plate grooves 22, and a flip limit tooth 24 that can be plugged and matched with the hanging rod flip worm 20 is installed on the end surface of one end of the flip limit plate 23 located inside the pipe hanging rod groove 8, and a flip limit block 25 is slidably installed inside the flip limit groove 21. , both left and right sides of the bottom end of the flip limit block 25 are provided with limit block inclined surfaces 26, and one end of the two flip limit plates 23 located inside the flip limit groove 21 is provided with a limit plate inclined surface 27, and a limit spring 28 is fixedly installed between the top of the flip limit block 25 and the top of the flip limit groove 21, and a limit plate spring 29 is fixedly connected between one end of the flip limit plate 23 located inside the pipe hanging rod groove 8 and the side of the pipe hanging rod groove 8, and the elastic force of the limit spring 28 is greater than the elastic force of the limit plate spring 29;

[0048] When the pipe hanging rod 10 is not needed, the electric hoist 5 needs to move along the cantilever 2. In order to prevent the pipe hanging rod 10 from being accidentally flipped downward and colliding with or interfering with the electric hoist 5, the pipe hanging rod 10 needs to be limited when the electric hoist 5 is used so that it cannot flip downward. Specifically, the flip limit block 25 is located at the bottom of the flip limit groove 21 under the elastic force of the limit spring 28, and the two limit block inclined surfaces 26 at the bottom of the flip limit block 25 can squeeze the limit plate inclined surface 27. The two flip limit plates 23 are made to slide toward the boom flip worm 20 respectively, so that the flip limit teeth 24 are plugged into and matched with the spiral teeth on the outside of the boom flip worm 20, and the two flip limit plates 23 stretch the limit plate springs 29 connected to them respectively. At this time, even if the boom flip motor 19 is started, the boom flip worm 20 cannot rotate due to the restriction of the flip limit teeth 24. Therefore, when the electric hoist 5 is used, the pipe hanger 10 can be prevented from flipping downward in the event of an error in operation, thereby avoiding interference with the electric hoist 5.

[0049] As attached Figure 6-Figure 7 As shown, the cross section of the cantilever 2 is in an "I" shape, and the electric hoist 5 includes a "U"-shaped movable base plate 30, which is suspended at the bottom of the cantilever 2 through a movable wheel. The left and right ends of the inner bottom surface of the movable base plate 30 are provided with a limit release inclined groove 31, and the bottom of the flip limit block 25 is fixedly connected with a flip limit release plate 32 extending from the bottom opening of the flip limit groove 21.

[0050] When the pipe hanging rod 10 needs to be used, the electric hoist 5 can be moved to the middle of the pipe hanging rod cantilever 7 to ensure that the electric hoist 5 will not affect the two pipe hanging rods 10 from flipping downward, and when the movable base plate 30 moves to the middle of the pipe hanging rod cantilever 7, the limit release inclined groove 31 will press the flip limit release plate 32 upward, so that the flip limit release plate 32 abuts against the inner bottom surface of the movable base plate 30, thereby driving the flip limit block 25 to move upward and compress the limit spring 28. At this time, the two flip limit plates 23 will also slide in the direction of the flip limit groove 21 due to the elastic force of the limit plate spring 29, so that the flip limit tooth 24 is separated from the hanging rod flip worm 20, and then the hanging rod flip motor 19 can be started to drive the hanging rod flip worm 20 to rotate, so that the two pipe hanging rods 10 can be flipped 90° downward for use;

[0051] When the electric hoist 5 is in use, each time it moves through the middle of the pipe hanging rod cantilever 7, it will squeeze the flip limit release plate 32 upward once, and the flip limit tooth 24 will also be separated from the hanging rod flip worm 20 once. However, as long as the electric hoist 5 leaves the middle of the pipe hanging rod cantilever 7, the flip limit tooth 24 will be plugged into the hanging rod flip worm 20 for limiting, which will not affect the overall limiting effect.

[0052] As attached Figure 5-Figure 8, Fig.12 , Fig.13 As shown, a rod adjusting screw 33 penetrating two pipe hanger grooves 8 and threadedly matched with two pipe hanger screw blocks 9 is rotatably installed between the left and right ends of the pipe hanger rod cantilever 7. The outer sides of the rod adjusting screw 33 are respectively provided with external threads located inside the two pipe hanger rod grooves 8, and the directions of the two external threads are opposite. A rod adjusting motor 34 connected to the rod adjusting screw 33 is fixedly installed on the right end of the pipe hanger rod cantilever 7. The rod adjusting motor 34 is connected to a power supply and a controller. When started, it can drive the rod adjusting screw 33 to rotate, thereby driving the two pipe hanger screw blocks 9 to move relative to or away from each other, thereby realizing the adjustment of the distance between the two pipe hangers 10, thereby fixing and limiting the two ends of pipes of different lengths.

[0053] As attached Figure 8 , Fig.13 As shown, a screw block limiting hole 35 located above the hanger shaft 17 is penetrated between the top and bottom surfaces of the pipe fitting hanger screw block 9, a limiting spring hole 36 is provided on the top surface of one end of the pipe fitting hanger slot 8 close to the middle of the pipe fitting hanger cantilever 7, a screw block limiting spring 37 is installed in the limiting spring hole 36, a limiting release groove 38 is provided on the top arc surface of the pipe fitting hanger 10, and a screw block limiting pin 39 is coaxially slidably installed in the screw block limiting hole 35;

[0054] Reference Figure 8 When the pipe hanging rod 10 is in the pipe hanging rod groove 8, it is in a horizontal state, and the bottom end of the screw block limiting pin 39 abuts against the side of the pipe hanging rod 10, so that the top end of the screw block limiting pin 39 enters the limiting spring hole 36 and compresses the screw block limiting spring 37, thereby limiting the pipe hanging rod screw block 9. At this time, the pipe hanging rod screw block 9 will not be able to drive the pipe hanging rod 10 to move;

[0055] Reference Fig.13 Only when the pipe hanger 10 is flipped downward 90° to a vertical state, the bottom end of the screw block limit pin 39 can enter the limit release groove 38 and abut against the lower concave part of the limit release groove 38. At this time, the top end of the screw block limit pin 39 is pushed outward by the screw block limit spring 37, so that the screw block limit pin 39 is on the outside of the limit spring hole 36. At this time, the distance between the two pipe hanger screw blocks 9 can be moved and adjusted.

[0056] As attached Figure 10-Figure 14As shown, the pipe hanging rod 10 includes an inner hanging rod 40 and an outer hanging rod 41, the top end of the inner hanging rod 40 is rotatably connected to the hanging rod shaft 17, the hanging rod flip worm 20 and the limit release groove 38 are both arranged at the top end of the inner hanging rod 40, and a hanging rod telescopic groove 42 is provided on the end face of the top end of the outer hanging rod 41, the inner hanging rod 40 is inside the hanging rod telescopic groove 42, and a telescopic screw hole 43 is provided on the bottom end face of the inner hanging rod 40, a telescopic lead screw 44 threadedly matched with the telescopic screw hole 43 is rotatably installed in the hanging rod telescopic groove 42, and a telescopic motor 45 connected to the telescopic lead screw 44 is installed at the bottom of the outer hanging rod 41, and the telescopic motor 45 is connected to a power supply and a controller, and when it is started, it can drive the telescopic lead screw 44 to rotate and transmit threadedly to the telescopic screw hole 43, so that the inner hanging rod 40 and the outer hanging rod 41 can be telescoped, thereby cooperating with the hook to synchronously lift and lower the pipe fitting.

[0057] As attached Fig.11 , Fig.12 , Fig.14 As shown, the pipe limiting assembly 11 includes a pipe limiting disk 46, a limiting side ring 47, a pipe limiting slide 48, a pipe limiting screw block 49, a pipe limiting cone 50, a pipe limiting screw rod 51, and a pipe limiting motor 52;

[0058] A pipe limiting plate 46 is fixedly installed on one side surface of the bottom end of the outer hanging rod 41 facing the middle of the pipe hanging rod cantilever 7, and a limiting side ring 47 is coaxially fixedly installed on the side surface of the pipe limiting plate 46 facing the middle of the pipe hanging rod cantilever 7. When the two pipe hanging rods 10 are in a vertical state, the openings of the two limiting side rings 47 are opposite to each other. When the hook needs to lift multiple pipes bundled together, the two ends of the bundled pipes can be placed on the inner sides of the two limiting side rings 47. The two pipe limiting plates 46 can block the two ends of multiple pipes, which can not only avoid the situation where one end of the bundled pipe is tilted up and the other end is sunken, but also the pipe limiting plates 46 can prevent the risk of individual pipes slipping, and can also limit the situation where the horizontal rotation hits other machines or personnel;

[0059] A pipe limiting slot 48 is passed through the two side surfaces of the pipe limiting disk 46, a pipe limiting screw block 49 is slidably installed in the pipe limiting slot 48, a pipe limiting cone 50 is fixedly installed on the side of the pipe limiting screw block 49 facing the middle of the pipe hanging rod cantilever 7, a pipe limiting screw rod 51 threadably matched with the pipe limiting screw block 49 is rotatably installed in the pipe limiting slot 48, the top end of the pipe limiting screw rod 51 passes through the top of the pipe limiting disk 46 and is connected to a pipe limiting motor 52, and the pipe The limiting motor 52 is connected to a power source and a controller. When it is started, it can drive the pipe limiting screw rod 51 to rotate, thereby driving the pipe limiting screw block 49 to slide and adjust the position of the pipe limiting cone 50. When a single pipe is lifted and moved, two pipe limiting cones 50 can be inserted into both ends of the pipe to fix and limit the pipe, thereby preventing the pipe from warping up, sliding down and rotating horizontally. When multiple pipes bundled together are lifted and moved, the position of the pipe limiting cone 50 can be adjusted so that it can be inserted into both ends of any pipe.

[0060] As attached Figure 8 , Fig.12 As shown, the cantilever extension support mechanism 6 includes a cantilever extension seat 53, a cantilever extension slot 54, a cantilever extension plate 55, a cantilever extension screw hole 56, a cantilever extension screw rod 57, a cantilever support slide slot 58, a cantilever support screw block 59, a cantilever support rod 60, and a cantilever support screw rod 61;

[0061] A cantilever extension seat 53 is fixedly installed on the outer surface of the rotating shaft 3, and a cantilever extension slot 54 is provided at one end of the cantilever extension seat 53 away from the rotating shaft 3. A cantilever extension plate 55 located in the cantilever extension slot 54 is fixedly installed at the left end of the cantilever 2, and a cantilever extension screw hole 56 is provided on the left end surface of the cantilever extension plate 55. A cantilever extension screw rod 57 threadedly matched with the cantilever extension screw hole 56 is rotatably installed in the cantilever extension slot 54. When the cantilever extension screw rod 57 rotates, it is threadedly transmitted with the cantilever extension screw hole 56, thereby driving the cantilever extension plate 55 to extend and retract in the cantilever extension slot 54, thereby realizing the adjustment of the length of the cantilever 2;

[0062] A cantilever support slot 58 is provided on the inclined surface on the right side of the trapezoidal support plate 4, a cantilever support screw block 59 is installed in the cantilever support slot 58, a cantilever support rod 60 is hinged at the right end of the cantilever support screw block 59, and the other end of the cantilever support rod 60 is hingedly installed at the bottom of the left end of the cantilever 2, a cantilever support screw rod 61 threadably matched with the cantilever support screw block 59 is rotatably installed between the top and bottom surfaces of the cantilever support slot 58, and the cantilever support screw rod 61 can rotate synchronously with the cantilever extension screw rod 57, as shown in the attached Figure 4 With attached Fig.11As shown, when the cantilever 2 is extended, it can drive the right end of the cantilever support rod 60 to move to the right, and at the same time, the cantilever support screw 61 drives the cantilever support screw block 59 to move upward, thereby making the left end of the cantilever support rod 60 move upward, so that the cantilever support rod 60 can still effectively support the extended cantilever 2.

[0063] The cantilever extension screw 57 is coaxially fixed with an extension screw bevel gear 62, the top end of the cantilever support screw 61 passes through the cantilever extension groove 54, and is coaxially fixed with a support screw bevel gear 63 that meshes with the extension screw bevel gear 62, thereby enabling the cantilever support screw 61 and the cantilever extension screw 57 to rotate synchronously, and the top of the cantilever extension seat 53 is fixedly installed with an extension motor 64, the extension motor 64 is connected to a power supply and a controller, the rotating shaft of the extension motor 64 passes through the cantilever extension groove 54, and is coaxially fixed with an extension drive bevel gear 65 that meshes with the extension screw bevel gear 62, when the extension motor 64 is started, the extension drive bevel gear 65 can drive the extension screw bevel gear 62 to rotate, thereby achieving the length adjustment of the cantilever 2.

[0064] It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0065] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0066] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A crane with a cantilever adjustment mechanism, comprising a column (1) and a cantilever (2), one end of the cantilever (2) being rotatably mounted on the top of the column (1) via a rotating shaft (3), a trapezoidal support plate (4) being mounted at the bottom of the cantilever (2) and being in contact with the outer side surface of the column (1), an electric hoist (5) being slidably mounted on the cantilever (2), characterized in that: A cantilever extension support mechanism (6) is installed at one end of the cantilever (2) close to the rotating shaft (3), and a pipe hanger cantilever (7) is fixedly installed at the bottom of the cantilever (2). Pipe hanger grooves (8) are provided at both left and right ends of the bottom surface of the pipe hanger cantilever (7), and a pipe hanger screw block (9) is slidably installed in each of the pipe hanger grooves (8). A pipe hanger (10) is hingedly installed at the bottom of each of the pipe hanger screw blocks (9), and a pipe limiting component (11) is installed at the bottom of each of the pipe hanger (10).

2. A crane with a cantilever adjustment mechanism according to claim 1, characterized in that: A rotating gear ring (12) is coaxially fixedly mounted on the outer surface of the column (1), a gear box (13) opened toward one side of the column (1) is fixedly mounted on the bottom of the trapezoidal support plate (4), a rotating motor (14) is fixedly mounted on the bottom of the gear box (13), a rotating shaft of the rotating motor (14) passes through the gear box (13) and is coaxially fixedly mounted with a rotating gear (15) meshing with the rotating gear ring (12).

3. A crane with a cantilever adjustment mechanism according to claim 1, characterized in that: A hanger mounting plate (16) is fixedly mounted on both the front and rear ends of the bottom surface of the pipe hanger screw block (9), a hanger shaft (17) is fixedly mounted between the two hanger mounting plates (16), the top end of the pipe hanger (10) is rotatably mounted on the hanger shaft (17), the top end of the pipe hanger (10) is semicircular and is equipped with an arc-shaped hanger tilting rack (18), a hanger tilting motor (19) is fixedly mounted on one end of the bottom surface of the pipe hanger screw block (9) close to the middle of the pipe hanger cantilever (7), and a hanger tilting worm (20) meshing with the hanger tilting rack (18) is coaxially fixedly mounted on the rotating shaft of the hanger tilting motor (19).

4. A crane with a cantilever adjustment mechanism according to claim 3, characterized in that: A flip limit groove (21) is provided in the middle of the bottom surface of the pipe hanging rod cantilever (7) and extends upwards. A flip limit plate groove (22) is penetrated between the left and right sides of the flip limit groove (21) and the two pipe hanging rod grooves (8). A flip limit plate (23) is slidably installed in each of the flip limit plate grooves (22). A flip limit tooth (24) capable of plugging and cooperating with the hanging rod flip worm (20) is installed on the end surface of one end of the flip limit plate (23) located inside the pipe hanging rod groove (8). The inside of the flip limit groove (21) slides up and down. A flip limit block (25) is installed, and limit block inclined surfaces (26) are arranged on the left and right sides of the bottom end of the flip limit block (25), and limit plate inclined surfaces (27) are arranged on one end of the two flip limit plates (23) located inside the flip limit groove (21), and a limit spring (28) is fixedly installed between the top of the flip limit block (25) and the top of the flip limit groove (21), and a limit plate spring (29) is fixedly connected between one end of the flip limit plate (23) located inside the pipe hanging rod groove (8) and the side surface of the pipe hanging rod groove (8).

5. A crane with a cantilever adjustment mechanism according to claim 4, characterized in that: The cross section of the cantilever (2) is in the shape of an "I" character. The electric hoist (5) comprises a movable base plate (30) in the shape of a "U". The movable base plate (30) is suspended at the bottom of the cantilever (2) via a movable wheel. The left and right ends of the inner bottom surface of the movable base plate (30) are provided with limit release inclined grooves (31). The bottom of the flip limit block (25) is fixedly connected with a flip limit release plate (32).

6. A crane with a cantilever adjustment mechanism according to claim 1, characterized in that: A rod adjusting screw (33) is rotatably installed between the left and right ends of the pipe hanger cantilever (7), which passes through the two pipe hanger grooves (8) and is threadedly matched with the two pipe hanger screw blocks (9). The outer side of the rod adjusting screw (33) is respectively provided with external threads located inside the two pipe hanger grooves (8), and the two external threads are in opposite directions. A rod adjusting motor (34) connected to the rod adjusting screw (33) is fixedly installed at the right end of the pipe hanger cantilever (7).

7. A crane with a cantilever adjustment mechanism according to claim 3, characterized in that: A screw limit hole (35) located above the hanger shaft (17) is penetrated between the top and bottom surfaces of the pipe hanger screw (9); a limit spring hole (36) is provided on the top surface of one end of the pipe hanger groove (8) close to the middle of the pipe hanger cantilever (7); a screw limit spring (37) is installed in the limit spring hole (36); a limit release groove (38) is provided on the top arc surface of the pipe hanger (10); a screw limit pin (39) is coaxially slidably installed in the screw limit hole (35); when the bottom end of the screw limit pin (39) abuts against the lower concave part of the limit release groove (38), the top end of the screw limit pin (39) is located outside the limit spring hole (36).

8. A crane with a cantilever adjustment mechanism according to claim 7, characterized in that: The pipe fitting hanger (10) includes an inner hanger (40) and an outer hanger (41), the top end of the inner hanger (40) is rotatably connected to the hanger shaft (17), the hanger tilting worm (20) and the limit release groove (38) are both arranged at the top end of the inner hanger (40), a hanger telescopic groove (42) is provided on the end face of the top end of the outer hanger (41), the inner hanger (40) is located inside the hanger telescopic groove (42), a telescopic screw hole (43) is provided on the bottom end face of the inner hanger (40), a telescopic screw rod (44) threadedly matched with the telescopic screw hole (43) is rotatably installed in the hanger telescopic groove (42), and a telescopic motor (45) connected to the telescopic screw rod (44) is installed at the bottom of the outer hanger (41).

9. A crane with a cantilever adjustment mechanism according to claim 8, characterized in that: The pipe limiting assembly (11) comprises a pipe limiting disk (46), a limiting side ring (47), a pipe limiting slide groove (48), a pipe limiting screw block (49), a pipe limiting cone (50), a pipe limiting screw rod (51), and a pipe limiting motor (52); A pipe limiting disk (46) is fixedly installed on a side surface of the bottom end of the outer suspension rod (41) facing the middle of the pipe suspension rod cantilever (7); a limiting side ring (47) is coaxially fixedly installed on the side surface of the pipe limiting disk (46) facing the middle of the pipe suspension rod cantilever (7); a pipe limiting groove (48) is penetrated between the two side surfaces of the pipe limiting disk (46); a pipe limiting screw block (49) is slidably installed in the pipe limiting groove (48); a pipe limiting cone (50) is fixedly installed on the side surface of the pipe limiting screw block (49) facing the middle of the pipe suspension rod cantilever (7); a pipe limiting screw rod (51) threadably matched with the pipe limiting screw block (49) is rotatably installed in the pipe limiting groove (48); the top end of the pipe limiting screw rod (51) penetrates to the top of the pipe limiting disk (46) and is connected to a pipe limiting motor (52).

10. A crane with a cantilever adjustment mechanism according to claim 1, characterized in that: The cantilever extension support mechanism (6) comprises a cantilever extension seat (53), a cantilever extension slot (54), a cantilever extension plate (55), a cantilever extension screw hole (56), a cantilever extension screw rod (57), a cantilever support slide slot (58), a cantilever support screw block (59), a cantilever support rod (60), and a cantilever support screw rod (61); A cantilever extension seat (53) is fixedly mounted on the outer surface of the rotating shaft (3); a cantilever extension slot (54) is provided at one end of the cantilever extension seat (53) away from the rotating shaft (3); a cantilever extension plate (55) located in the cantilever extension slot (54) is fixedly mounted on the left end of the cantilever (2); a cantilever extension screw hole (56) is provided on the left end surface of the cantilever extension plate (55); a cantilever extension screw rod (57) threadedly matched with the cantilever extension screw hole (56) is rotatably mounted in the cantilever extension slot (54); A cantilever support slot (58) is provided on the inclined surface on the right side of the trapezoidal support plate (4), a cantilever support screw block (59) is installed in the cantilever support slot (58), a cantilever support rod (60) is hingedly connected to the right end of the cantilever support screw block (59), and the other end of the cantilever support rod (60) is hingedly installed at the bottom of the left end of the cantilever (2), and a cantilever support screw rod (61) that is threadedly matched with the cantilever support screw block (59) is rotatably installed between the top surface and the bottom surface of the cantilever support slot (58).

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