Suspension arm device for insulated boom truck
By integrating telescopic and luffing cylinders and rotatable lights, the problems of large space occupation and blind spots at night in traditional lifting devices are solved. This achieves space optimization and safety improvement of the boom device, simplifies the maintenance process, and improves the operating efficiency of the insulated bucket truck.
Patent Information
- Application Number
- CN202511570722.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-30
- Publication Date
- 2026-02-24
AI Technical Summary
Traditional lifting devices have independent luffing and telescopic mechanisms that occupy a lot of space, encroaching on the upper operating space of the work bucket, posing safety risks, and causing operational errors due to blind spots in lighting during nighttime lifting.
The design incorporates a linkage between the telescopic cylinder and the luffing cylinder, allowing the mechanisms to share resources through connecting components. Combined with a rotatable lighting fixture and a mechanical positioning structure, it optimizes the telescopic and luffing movements of the boom device, enhances the adjustment and fixation of the lighting angle, reduces the overall size of the device, prevents rope detachment, and improves safety.
It significantly reduces the overall size of the lifting device, avoids encroaching on the operating space, improves the lighting accuracy and safety of nighttime lifting, reduces the risk of high-altitude operations, simplifies the maintenance process, and enhances the overall operating efficiency of the insulated bucket truck.
Smart Images
Figure CN121553847A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of crane boom technology, and more specifically, to an insulated bucket boom crane device for trucks. Background Technology
[0002] With societal development, aerial work platforms have become more widely used, and their operating conditions have become more complex. During operations, it is often necessary to lift tools, materials, and other items of a certain weight. Currently, lifting devices typically employ independent luffing and telescopic mechanisms. Due to their structural layout, these mechanisms occupy a large amount of space, and the boom structure encroaches on the upper operating space of the work platform, causing inconvenience and safety risks. Traditional lifting devices, with their luffing and telescopic mechanisms arranged vertically and operating independently without any interoperability, result in a large lifting device size that also encroaches on the upper operating space of the work platform, posing a risk of collision for operators. Summary of the Invention
[0003] The purpose of this invention is to provide an insulated bucket boom crane device for trucks to solve the problems mentioned in the background art.
[0004] To achieve the above objectives, the present invention provides the following technical solution: An insulated bucket truck crane device includes a mounting base and a bracket. A sliding telescopic boom is mounted on the upper side of the bracket, and a winch for lifting is mounted on the upper side of the bracket. The bracket is provided with a connecting assembly. The side walls of the mounting base are respectively provided with a telescopic drive assembly and a luffing drive assembly. The telescopic drive assembly is used to drive the connecting assembly to drive the telescopic boom to move, and the luffing drive assembly is used to drive the connecting assembly to drive the bracket to tilt at an angle. The lower side of the telescopic arm is equipped with a mounting bracket and a lighting lamp. A mounting rod is rotatably mounted inside the mounting bracket. A connecting rod is sleeved on the outer side wall of the mounting rod. A connecting block is installed at the lower end of the connecting rod. An installation component is installed inside the connecting block. The installation component is used to install and remove the lighting lamp inside the mounting bracket. One end of the mounting rod extends out of the mounting bracket, and a locking element is provided at the extended end of the mounting rod to lock the rotation of the mounting rod.
[0005] Preferably, the connecting assembly includes a telescopic link hinged at one end to the bracket, the other end of the telescopic link hinged to the mounting base, an upper link hinged to the side wall of the bracket, a lower link hinged at one end of the upper link, and a telescopic link hinged at one end of the lower link.
[0006] Preferably, the telescopic drive assembly includes a telescopic cylinder hinged to the mounting base, and the output shaft of the telescopic cylinder is hinged to the telescopic connecting rod.
[0007] Preferably, the luffing drive assembly includes a luffing cylinder hinged to the mounting base, and the output shaft of the luffing cylinder is hinged to one end of the upper connecting rod.
[0008] Preferably, a guide tube is fixedly installed on the upper side of the bracket, one end of the telescopic arm is inserted into the guide tube, and a fixing pin for fixing the telescopic arm is installed on the outer wall of the guide tube.
[0009] Preferably, a fixing block is installed on the side wall of the lighting lamp, and a fixing groove for the fixing block to be inserted is provided in the connecting block; The mounting components include multiple first bolts that are mounted on the outer wall of the connecting block.
[0010] Preferably, the outer side wall of the mounting bracket is provided with multiple insertion holes, and a protrusion is installed at the through end of the mounting bracket; The locking component includes a locking cylinder sleeved on the outer wall of the mounting rod. The locking cylinder has a groove inside for the protrusion to be engaged. A locking plate is installed on the side wall of the locking cylinder facing the mounting frame. Multiple insert rods are installed on the side wall of the locking plate facing the mounting frame.
[0011] Preferably, a push plate is installed at the end of the locking cylinder away from the mounting bracket, and a nut is threaded onto the outer wall of the mounting rod.
[0012] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention, through the linkage design of the telescopic cylinder and the luffing cylinder, utilizes connecting components to achieve mutual borrowing of mechanisms. When the telescopic cylinder is pushed, it not only drives the telescopic arm to move, but also drives the upper connecting rod to finely adjust the bracket angle through the lower connecting rod, ensuring smooth telescopic movement. When the luffing cylinder is working, the telescopic mechanism automatically turns into a support structure. This design significantly reduces the overall size of the device and solves the problem of excessive space occupation by traditional independent mechanisms, especially avoiding encroachment on the upper operating space of the working bucket.
[0013] 2. This invention features a rotatable lighting lamp located below the telescopic arm. The lighting angle can be freely adjusted via a mounting rod and a connecting rod. The locking mechanism ensures that the lighting direction is stable after adjustment. The design of the protrusion embedded in the groove enhances torsional resistance, and the nut pushes the locking cylinder to further prevent loosening. This structure effectively solves the problem of blind spots in nighttime hoisting lighting and improves operational accuracy and safety.
[0014] 3. The present invention features a guide tube nested with a telescopic arm design, which, together with multi-level through holes and fixing pins on the side wall, enables flexible adjustment and rigid locking of the telescopic length. The telescopic arm can be slid to the required length by pulling out the fixing pin, and can be fixed by reinserting it. This mechanical positioning structure is simple and reliable, avoids the risk of hydraulic system failure, and ensures that the boom does not shift unexpectedly during hoisting.
[0015] 4. In this invention, the lighting lamp is inserted into the fixing slot of the connecting block via a fixing block and secured by a first bolt on the side wall. Disassembly only requires loosening the bolt to remove the lighting lamp; no tools are needed to disassemble the entire bracket. This modular design significantly simplifies the maintenance process, facilitates the replacement of damaged lamps or the upgrading of lighting equipment, and reduces maintenance downtime.
[0016] 5. In this invention, a rope-stopping shaft is added in front of the pulley at the front end of the telescopic boom to effectively prevent the hoisting rope from detaching from the pulley groove, i.e., "rope skipping". Combined with the reducer assembly to control the winch to retract and release the rope, it ensures the stability of the rope trajectory during the hoisting process. This design reduces the risk of heavy objects swaying or falling due to rope detachment from the groove during high-altitude operations from the source.
[0017] 6. This invention achieves mechanical optimization of telescopic and luffing actions through efficient power transmission of the cylinder-linkage system (e.g., the telescopic cylinder pushes the lower link via the fifth pin, linking the upper link and the bracket). The layout of each hinge point (first to seventh pins) is compact, reducing internal friction of the mechanism. The protective cover ensures appearance and safety. Ultimately, it integrates hoisting, lighting, luffing, and telescopic functions in a limited space, significantly improving the overall operating efficiency of the insulated bucket truck. Attached Figure Description
[0018] Figure 1 This is a front structural diagram of the boom device in this invention.
[0019] Figure 2 This is a side view of the boom device in this invention.
[0020] Figure 3 This is a schematic diagram of the structure of the first protective cover, the third protective cover, and the fifth protective cover in this invention.
[0021] Figure 4 This is a schematic diagram of the structure of the second, fourth, and sixth protective covers in this invention.
[0022] Figure 5 This is a schematic diagram of the mounting bracket in this invention.
[0023] Figure 6 This is a schematic diagram of the connecting block in this invention.
[0024] Figure 7 This is a schematic diagram of the structure of the fixing block in this invention.
[0025] Figure 8 This is a schematic diagram of the locking component in this invention.
[0026] Figure 9 This is a schematic diagram of the mounting rod and insertion hole in this invention.
[0027] Figure 10 This is a schematic diagram of the locking cylinder in this invention.
[0028] The meanings of the labels in the diagram are as follows: 11. Mounting base; 12. Sixth pin; 13. Telescopic cylinder; 14. Fifth pin; 15. Telescopic connecting rod; 16. First pin; 17. Second pin; 18. Seventh pin; 19. Luffing cylinder; 20. Lower connecting rod; 21. Bracket; 22. Upper connecting rod; 23. Third pin; 24. Reducer assembly; 25. Winch; 26. Fourth pin; 27. Fixing pin; 28. Telescopic boom; 29. Pulley; 30. Rope guide shaft; 31. Guide tube; 32. Mounting bracket; 33, First protective cover; 34, Third protective cover; 35, Fifth protective cover; 40, Second protective cover; 41, Fourth protective cover; 42, Sixth protective cover; 50, Lighting lamp; 51, Mounting rod; 52, Second bolt; 60, Connecting rod; 61, Connecting block; 62, First bolt; 70, Fixing block; 80, Locking cylinder; 81, Locking plate; 82, Push plate; 83, Nut; 84, Turning handle; 91, Insertion hole; 92, Protrusion; 93, Groove; 94, Insert rod. Detailed Implementation
[0029] To further understand the content of this invention, a detailed description of the invention will be provided in conjunction with the accompanying drawings and embodiments. It should be understood that the embodiments are merely illustrative and not limiting of the invention.
[0030] The following is in conjunction with the appendix Figures 1-10 This embodiment will be described in further detail.
[0031] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, an insulated bucket truck boom device in this embodiment includes a mounting base 11 and a bracket 21. A sliding telescopic boom 28 is mounted on the upper side of the bracket 21, and a winch 25 for lifting is mounted on the upper side of the bracket 21. The bracket 21 is provided with a connecting assembly. The side walls of the mounting base 11 are respectively provided with a telescopic drive assembly and a luffing drive assembly. The telescopic drive assembly is used to drive the connecting assembly to drive the telescopic boom 28 to move, and the luffing drive assembly is used to drive the connecting assembly to drive the bracket 21 to tilt at an angle. The lower side of the telescopic arm 28 is provided with a mounting bracket 32 and a lighting lamp 50. A mounting rod 51 is rotatably mounted inside the mounting bracket 32. A connecting rod 60 is sleeved on the outer side wall of the mounting rod 51. A connecting block 61 is installed at the lower end of the connecting rod 60. An installation component is provided inside the connecting block 61. The installation component is used to install and remove the lighting lamp 50 inside the mounting bracket 32. One end of the mounting rod 51 extends out of the mounting bracket 32, and the extended end of the mounting rod 51 is provided with a locking element, which is used to lock the rotation of the mounting rod 51.
[0032] In this embodiment, a reducer assembly 24 is installed on the bracket 21, and a pulley 29 is rotatably installed on the front section of the telescopic arm 28 through a bearing. One end of the hoisting rope is fixed to the winch 25, and the other end of the hoisting rope passes around the pulley 29. The reducer assembly 24 drives the winch 25 to rotate, so that the winch 25 can lift the weight through the hoisting rope. A rope-blocking shaft 30 is fixedly installed in front of the pulley 29 to prevent the hoisting rope from jumping. The telescopic drive assembly can drive the bracket 21 to change its angle slightly through the connecting assembly, thereby moving the telescopic arm 28 forward. Similarly, when the telescopic drive assembly performs the opposite action through the connecting assembly, the telescopic arm 28 can be moved backward. Among them, the variable amplitude drive component can drive the bracket 21 to change its angle through the connecting component, and the change in the angle of the bracket 21 can drive the angle of the telescopic arm 28 to change accordingly. The bracket 21 has a guide tube 31 fixedly installed on its upper side. One end of the telescopic arm 28 is inserted into the guide tube 31. The outer wall of the guide tube 31 is equipped with a fixing pin 27 for fixing the telescopic arm 28. The side wall of the telescopic arm 28 is provided with multiple through holes at intervals, so that the fixing pin 27 passes through the through holes of the telescopic arm 28 and is fixed in the guide tube 31 to fix the telescopic arm 28. When it is necessary to extend or retract the telescopic arm 28 in the guide tube 31, the fixing pin 27 is pulled out, and the telescopic arm 28 is pulled out or retracted in the guide tube 31 to the corresponding length. Then, the fixing pin 27 is passed through the through holes of the telescopic arm 28 and fixed in the guide tube 31. In order to facilitate lifting at night by hoisting ropes, the lighting lamp 50 is installed in the connecting block 61 by the installation component. Then, the mounting bracket 32 is installed on the lower side of the telescopic boom 28 to realize the installation of the lighting lamp 50 on the telescopic boom 28. At this time, the lighting lamp 50 illuminates the lifting area, which makes it easier for the workers to connect the lifting rope to the heavy object and avoids the situation that insufficient light in the lifting area may lead to operation errors. The mounting rod 51 is rotatably mounted on the corresponding side wall of the mounting bracket 32 via bearings at both ends. The connecting rod 60 is fixedly sleeved on the mounting rod 51. By rotating the mounting rod 51, the mounting rod 51 drives the connecting block 61 to rotate via the connecting rod 60, thereby adjusting the direction of the lighting and enabling the lighting lamp 50 to illuminate different areas. This improves the practicality of the lighting lamp 50 and reduces blind spots. After the mounting rod 51 is rotated, the rotation is locked by a locking device, ensuring that the lighting lamp 50 always maintains the adjusted direction. In actual use, the side wall of the mounting bracket 32 is equipped with multiple second bolts 52. By passing through the mounting bracket 32 and threading them into the side wall of the telescopic arm 28, the mounting bracket 32 is installed on the lower side of the telescopic arm 28. When the multiple second bolts 52 are turned out from the lower side of the telescopic arm 28, the installation of the mounting bracket 32 on the lower side of the telescopic arm 28 can be released.
[0033] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, in this embodiment, the connecting component includes a telescopic link 15 with one end hinged to the bracket 21, and the other end of the telescopic link 15 hinged to the mounting base 11. An upper link 22 is hinged to the side wall of the bracket 21, and a lower link 20 is hinged to one end of the upper link 22. One end of the lower link 20 is hinged to the telescopic link 15.
[0034] In this embodiment, one end of the telescopic link 15 is hinged to the bracket 21 via the first pin 16, and the other end of the telescopic link 15 is hinged to the mounting base 11 via the second pin 17. The upper link 22 is hinged to the bracket 21 via the third pin 23. The upper link 22 and the lower link 20 are hinged together via the fourth pin 26. One end of the lower link 20 is then hinged to the telescopic link 15 via the fifth pin 14. The telescopic drive assembly includes a telescopic cylinder 13 hinged to the mounting base 11, with its output shaft hinged to the telescopic connecting rod 15. The telescopic cylinder 13 is hinged to the mounting base 11 via a sixth pin 12, and its output shaft is hinged to the telescopic connecting rod 15 via a fifth pin 14. The luffing drive assembly includes a luffing cylinder 19 hinged to the mounting base 11, with its output shaft hinged to one end of the upper connecting rod 22. The luffing cylinder 19 is hinged to the mounting base 11 via a seventh pin 18, and its output shaft is hinged to one end of the upper connecting rod 22 via a fourth pin 28. 6 is hinged to the upper connecting rod 22 and the lower connecting rod 20. When the output shaft of the telescopic cylinder 13 extends, the telescopic cylinder 13 can push the telescopic connecting rod 15. The telescopic connecting rod 15 changes angle simultaneously with the telescopic cylinder 13. Since the lower connecting rod 20 is connected to the telescopic connecting rod 15 through the fifth pin 14, the lower connecting rod 20 causes the upper connecting rod 22 and the luffing cylinder 19 to change angle through the fourth pin 26, thereby keeping the angle of the bracket 21 relatively small, thus realizing the forward displacement of the telescopic arm 28. Similarly, when the telescopic cylinder 13 retracts, it performs the opposite action to realize the backward displacement of the telescopic arm 28. When the luffing cylinder 19 extends, it drives the upper connecting rod 22 and the lower connecting rod 20 to push the bracket 21 to rotate, thereby causing the angle between the bracket 21 and the telescopic arm 28 to change. At the same time, the telescopic connecting rod 15 and the telescopic cylinder 13 always maintain their original state as a support structure. Among them, by cleverly borrowing from each other between the luffing component and the telescopic component, the luffing and telescopic functions are fully utilized, the size of the lifting device is reduced, and at the same time, the space occupied by the insulated bucket boom vehicle crane device on the upper part of the working bucket is avoided, thus improving the overall vehicle performance. In actual use, to ensure the aesthetic appearance of the structure, this type of insulated bucket boom vehicle crane device is equipped with a first protective cover 33, a second protective cover 40, a third protective cover 34, a fourth protective cover 41, a fifth protective cover 35 and a sixth protective cover 42.
[0035] like Figure 5 , Figure 6 and Figure 7 As shown, in this embodiment, a fixing block 70 is installed on the side wall of the lighting lamp 50, and a fixing groove for the fixing block 70 to be inserted is provided in the connecting block 61. The mounting components include multiple first bolts 62 mounted on the outer wall of the connecting block 61.
[0036] In this embodiment, the fixing block 70 is installed in the fixing groove by threading multiple first bolts 62 through the connecting block 61 and inserting them into the connecting block 61, that is, the lighting lamp 50 is installed on the connecting block 61. In actual use, when the multiple first bolts 62 are rotated and the multiple first bolts 62 are turned out of the fixing block 70, the installation of the fixing block 70 in the fixing groove can be released. At this time, the lighting lamp 50 can be removed from the connecting block 61 for inspection or replacement.
[0037] like Figure 8 , Figure 9 and Figure 10 As shown, in this embodiment, the outer side wall of the mounting bracket 32 is provided with a plurality of insertion holes 91, and the through end of the mounting bracket 32 is provided with a protrusion 92. The locking component includes a locking cylinder 80 sleeved on the outer wall of the mounting rod 51. The locking cylinder 80 has a groove 93 for the protrusion 92 to be inserted into. A locking plate 81 is installed on the side wall of the locking cylinder 80 facing the mounting bracket 32. Multiple insert rods 94 are installed on the side wall of the locking plate 81 facing the mounting bracket 32.
[0038] In this embodiment, multiple insertion holes 91 are arranged along the circumference of the mounting rod 51. When the locking cylinder 80 is sleeved on the mounting rod 51, the protrusion 92 on the mounting rod 51 will be inserted into the groove 93. After the mounting rod 51 completes rotation, by moving the locking cylinder 80 and causing the locking plate 81 on the locking cylinder 80 to move towards the mounting bracket 32, when the insertion rod 94 on the locking plate 81 is inserted into the corresponding insertion hole 91, the rotation of the locking cylinder 80 can be locked. When the locking cylinder 80 is locked, the rotation of the mounting rod 51 is also locked through the cooperation of the groove 93 and the protrusion 92. When it is necessary to release the lock on the mounting rod 51, it is done by driving the locking cylinder 80. The locking cylinder 80 moves and drives the locking plate 81 away from the mounting bracket 32. When the insertion rod 94 on the locking plate 81 slides out from the corresponding insertion hole 91, the lock on the mounting rod 51 can be released. To prevent the locking cylinder 80 from moving the locking plate 81 when the mounting rod 51 is locked, causing the insertion rod 94 on the locking plate 81 to slide out of the insertion hole 91, a push plate 82 is installed at the end of the locking cylinder 80 away from the mounting bracket 32. A nut 83 is threaded on the outer wall of the mounting rod 51. When the insertion rod 94 on the locking plate 81 is inserted into the insertion hole 91, the nut 83 is rotated, and the nut 83 moves to push the push plate 82 to move. The push plate 82 moves to push the locking cylinder 80 to move, thereby making the locking plate 81 abut against the mounting bracket 32 and preventing the insertion rod 94 from sliding out of the insertion hole 91. When the nut 83 is rotated and moved away from the push plate 82, the insertion rod 94 on the locking plate 81 can be driven to slide out of the insertion hole 91. In actual use, the extended end of the mounting rod 51 is equipped with a handle 84, which facilitates the rotation of the mounting rod 51.
[0039] In practical use, when the telescopic cylinder 13 extends, the telescopic connecting rod 15 changes angle under the push of the cylinder. Since the lower connecting rod 20 is connected to the telescopic connecting rod 15 through the fifth pin 14, the lower connecting rod 20, under the push of the telescopic connecting rod 15, causes the upper connecting rod 22 and the luffing cylinder 19 to change angle accordingly, thereby keeping the angle of the support 21 relatively small, thus achieving forward displacement of the telescopic arm 28. Similarly, when the telescopic cylinder 13 retracts, it performs the opposite action to achieve telescopic movement. When boom 28 moves backward, and luffing cylinder 19 extends, the cylinder drives upper connecting rod 22 and lower connecting rod 20 to push bracket 21 to change angle. At the same time, telescopic connecting rod 15 and telescopic cylinder 13 always remain in their original state as support structures. In order to further extend and retract the boom, when it is necessary to extend or retract the telescopic boom 28, pull out the fixing pin 27 to pull the telescopic boom 28 out or retract it to the corresponding length, and then use the fixing pin 27 to fix it. When winch 25 rotates, winch 25 can lift the weight through the hoisting rope.
[0040] In summary, the above description is only a preferred embodiment of the present invention. All equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the present invention.
Claims
1. An insulated bucket boom crane device, comprising a mounting base (11) and a bracket (21), characterized in that: A sliding telescopic arm (28) is installed on the upper side of the bracket (21), and a winch (25) for lifting is installed on the upper side of the bracket (21). The bracket (21) is provided with a connecting component, and the side wall of the mounting base (11) is provided with a telescopic drive component and a variable amplitude drive component. The telescopic drive component is used to drive the connecting component to drive the telescopic arm (28) to move, and the variable amplitude drive component is used to drive the connecting component to drive the bracket (21) to tilt at an angle. The lower side of the telescopic arm (28) is provided with a mounting bracket (32) and a lighting lamp (50). A mounting rod (51) is rotatably installed inside the mounting bracket (32). A connecting rod (60) is sleeved on the outer side wall of the mounting rod (51). A connecting block (61) is installed at the lower end of the connecting rod (60). An installation component is provided inside the connecting block (61). The installation component is used to install and remove the lighting lamp (50) inside the mounting bracket (32). One end of the mounting rod (51) extends out of the mounting bracket (32), and the extended end of the mounting rod (51) is provided with a locking element, which is used to lock the rotation of the mounting rod (51).
2. The insulated bucket boom crane device according to claim 1, characterized in that: The connecting assembly includes a telescopic link (15) with one end hinged to the bracket (21), the other end of the telescopic link (15) hinged to the mounting base (11), an upper link (22) hinged to the side wall of the bracket (21), a lower link (20) hinged to one end of the upper link (22), and a lower link (20) hinged to one end of the lower link (20).
3. The insulated bucket boom crane device according to claim 2, characterized in that: The telescopic drive assembly includes a telescopic cylinder (13) hinged to the mounting base (11), and the output shaft of the telescopic cylinder (13) is hinged to the telescopic link (15).
4. The insulated bucket boom crane device according to claim 1, characterized in that: The luffing drive assembly includes a luffing cylinder (19) hinged to the mounting base (11), and the output shaft of the luffing cylinder (19) is hinged to one end of the upper connecting rod (22).
5. The insulated bucket boom crane device according to claim 2, characterized in that: A guide tube (31) is fixedly installed on the upper side of the bracket (21), and one end of the telescopic arm (28) is inserted into the guide tube (31). A fixing pin (27) for fixing the telescopic arm (28) is installed on the outer side wall of the guide tube (31).
6. The insulated bucket boom crane device according to claim 1, characterized in that: A fixing block (70) is installed on the side wall of the lighting lamp (50), and a fixing groove for the fixing block (70) to be inserted is provided in the connecting block (61); The mounting components include multiple first bolts (62) mounted on the outer wall of the connecting block (61).
7. The insulated bucket boom crane device according to claim 1, characterized in that: The outer side wall of the mounting bracket (32) is provided with multiple insertion holes (91), and the through end of the mounting bracket (32) is provided with a protrusion (92). The locking component includes a locking cylinder (80) sleeved on the outer wall of the mounting rod (51), the locking cylinder (80) having a groove (93) for the protrusion (92) to be inserted into, a locking plate (81) being installed on the side wall of the locking cylinder (80) facing the mounting frame (32), and multiple insert rods (94) being installed on the side wall of the locking plate (81) facing the mounting frame (32).
8. The insulated bucket boom crane device according to claim 7, characterized in that: A push plate (82) is installed at the end of the locking cylinder (80) away from the mounting bracket (32), and a nut (83) is threaded onto the outer wall of the mounting rod (51).