An assembled crane main beam with a self-locking structure

Abstract

This invention provides an assembled crane main beam with a self-locking structure, relating to the field of crane technology. It includes a square tube beam, an inner square tube, a drive locking mechanism, adjusting shims, and a quick-clamping mechanism. This invention features a reasonable and simple structure, low production cost, convenient installation, and complete functionality. The main beam frame is formed by splicing multiple basic components, capable of bearing the main loads during crane operation and providing a stable mounting platform for each component. Furthermore, through the cooperation of related mechanisms and movable components, the connection and fixation of adjacent frames are achieved, meeting the basic operation requirements of the crane. This invention utilizes the coordinated work of related components in the drive locking mechanism to both drive the movable components to move and adjust the length, and lock them in place through a self-locking structure to prevent loosening of components, ensuring the stability and safety of the main beam after its length is fixed, and eliminating the safety hazards of loosening in traditional bolted connections.

Description

Technical Field

[0001] This invention relates to the field of crane technology, and in particular to an assembled crane main beam with a self-locking structure. Background Technology

[0002] In crane applications, the main beam, as the core load-bearing component, directly affects the crane's operational stability, applicability, and assembly / disassembly efficiency. Currently, most crane main beams on the market are either integral welded structures or segmented bolted connections, which have significant limitations: integral main beams are restricted by transport dimensions, making them difficult to adapt to the transportation and installation needs of complex sites; moreover, once manufactured, their length cannot be adjusted, hindering flexible responses to different span operating scenarios. While segmented bolted main beams solve the transportation problem, assembly requires tightening with numerous bolts, which is not only cumbersome and time-consuming but also prone to loosening due to long-term vibration loads, posing safety hazards. Furthermore, existing segmented main beams lack effective self-locking mechanisms at their connection points, requiring repeated calibration with external measuring tools when adjusting length, making it difficult to guarantee connection accuracy. Gaps can easily form between adjacent segments due to manufacturing errors, resulting in poor overall flatness and insufficient load-bearing stability of the main beam. In addition, the traditional main beam assembly / disassembly process requires disassembling numerous connecting parts, leading to low efficiency, especially during emergency repairs or site relocation, severely impacting work progress. In summary, the existing crane main beams have deficiencies in terms of flexibility, stability, ease of assembly and disassembly, and safety, which can no longer meet the modern engineering requirements for cranes to be efficient, reliable, and multifunctional. There is an urgent need for a main beam structure that is flexibly adjustable, stable, self-locking, and easy to assemble and disassemble to solve the above problems. Summary of the Invention

[0003] The purpose of this invention is to provide an assembled crane main beam with a self-locking structure to solve the above-mentioned problems. This solves the problems of existing crane main beams, such as transportation being limited by size, inflexible length adjustment, lack of reliable self-locking connections leading to easy loosening, insufficient load-bearing stability due to gaps, and low assembly and disassembly efficiency.

[0004] To address the aforementioned problems, this invention provides a technical solution: an assembled crane main beam with a self-locking structure, comprising a square tube beam, inner square tubes, a drive locking mechanism, adjusting shims, and a quick-clamping mechanism; the square tube beams are multiple, each having a drive locking mechanism fixedly connected to the interior of one side and a quick-clamping mechanism fixedly connected to the interior of the other side; the inner square tubes are multiple, each externally movably connected to the interior of a corresponding square tube beam, each internally connected to a corresponding drive locking mechanism, and each externally connected to a corresponding quick-clamping mechanism; the adjusting shims are multiple, each located between two adjacent square tube beams, with the interior of each adjusting shim located outside the corresponding inner square tube.

[0005] Preferably, the drive locking mechanism includes a fixed base, a screw, a telescopic drive mechanism, a locking structure, and a nut block; the fixed base is externally fixedly connected to the inside of one side of the square tube beam, and the fixed base is internally provided with the telescopic drive mechanism and the locking structure; one side of the screw is externally movably connected to the inside of the fixed base and connected to the telescopic drive mechanism and the locking structure; the nut block is externally fixedly connected to the inside of one side of the inner square tube, and the threaded hole in the center of the nut block is connected to the screw.

[0006] Preferably, the telescopic drive mechanism includes a driven gear, a driving gear, a rotating head, and a connecting hole; the driven gear is movably connected inside the fixed base, and the center of the driven gear is fixedly connected to the outer side of one side of the screw; the driving gear is movably connected to the upper side inside the fixed base, and the driving gear is connected to the driven gear; a rotating head is fixedly connected to the central shaft on the upper side of the driving gear, and an internal hexagonal hole is opened in the center of the outer side of the rotating head; the connecting hole is located outside the rotating head and is opened on the upper side of the square tube beam.

[0007] Preferably, the locking structure includes a locking gear, locking teeth, a movable block, a sliding hole, a spring, a screw, a connecting hole, and an anti-rotation washer; the locking gear is movably connected inside the fixed base, and the inside of the locking gear is fixedly connected to the outside of one side of the screw; the sliding hole is located on the upper side of the locking gear and is located inside the upper side of the fixed base; the movable block is vertically movably connected to the inside of the sliding hole, and the bottom of the movable block is provided with locking teeth, which are connected to the upper side of the locking gear; a spring is provided between the upper side of the movable block and the upper side of the sliding hole; the lower external thread of the screw is connected to the internal thread provided on the upper side of the movable block, and an anti-rotation washer is provided between the upper stepped surface of the screw and the top of the sliding hole; the connecting hole is located outside the sliding hole and is opened on the upper side of the square tube beam.

[0008] Preferably, the screw is an internal hexagon screw.

[0009] Preferably, the quick clamping mechanism includes a fixing block, an annular groove, a second fixing seat, and a clamping structure; the fixing block is fixedly connected to the opening on the other side of the inner square tube, and the annular groove is provided on the outer side of the fixing block; the second fixing seat is externally fixedly connected to the inside of the other side of the square tube beam, and the second fixing seat has a clamping structure inside, and the clamping structure is connected to the annular groove.

[0010] Preferably, the clamping structure includes a connecting hole three, a guide hole, a slider, a stud, a clamping hook body, a transmission gear, a linkage gear, a spring two, and a groove; there are several guide holes, which are respectively opened around the inside of the fixed base two, and a stud is movably connected to the center of each of the guide holes, and a transmission gear is fixedly connected to the inner end of each stud; the linkage gear is movably connected to the center of the fixed base two, and the linkage gear is connected to all the transmission gears; there are several clamping hook bodies, and one side of each clamping hook body is movably connected to the inner side of a corresponding guide hole, and the clamping hook body one... The sides of each locking hook are movably connected to the outside of the corresponding studs, and the hooks on the other side of each locking hook are connected to the inside of the annular groove. The groove is located inside the locking hook body and is opened inside the fixed seat. A spring is provided between the groove and the inside of the corresponding locking hook body. There are several sliders, and the outside of each slider is movably connected to the inside of the corresponding guide hole. The threaded hole in the center of each slider is connected to the corresponding stud. There are several connecting holes, and the connecting holes are located outside the corresponding studs. The connecting holes are opened around the outside of the square tube beam.

[0011] Preferably, the outer end of the stud has an internal hexagonal hole.

[0012] The beneficial effects of the present invention are: (1) The present invention has the characteristics of reasonable and simple structure, low production cost, convenient installation and complete functions. The main beam frame is formed by splicing multiple basic components, which can bear the main load when the crane is working, provide a stable installation carrier for each component, and realize the connection and fixation of adjacent frames with the help of relevant mechanisms and moving components, so as to meet the basic operation requirements of the crane.

[0013] (2) The present invention allows the main beam to be flexibly adjusted by moving the movable component along the axial direction inside the frame, adapting to different span operation scenarios, solving the limitation of the fixed length of the traditional main beam, and improving the applicability and flexibility of the crane.

[0014] (3) The present invention utilizes the coordinated work of related components of the driving locking mechanism to drive the moving components to achieve length adjustment, and locks them in place through a self-locking structure after adjustment to prevent the components from loosening, ensuring the stability and safety of the main beam after the length is fixed, and eliminating the safety hazard of easy loosening of traditional bolt connections.

[0015] (4) By adding shims of different thicknesses between adjacent frames, the present invention can compensate for the small gaps caused by manufacturing errors or installation requirements, realize the fine adjustment of the dimensional accuracy after the main beam is spliced, make the adjacent frames tightly connected, and improve the flatness and load-bearing stability of the overall structure of the main beam.

[0016] (5) With the help of the structure of the quick clamping mechanism, the present invention can realize the quick clamping and separation of the moving components and the frame without disassembling a large number of connecting parts, simplifying the assembly and disassembly process of the main beam and greatly improving the assembly and disassembly efficiency. Especially in emergency maintenance or site relocation, it effectively reduces the impact on the work progress. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention.

[0018] Figure 2 for Figure 1 A sectional view.

[0019] Figure 3 This is a schematic diagram of the structure of the locking mechanism.

[0020] Figure 4 This is a schematic diagram of the telescopic drive mechanism.

[0021] Figure 5 This is a schematic diagram of the locking structure.

[0022] Figure 6 This is a schematic diagram of the quick-clamping mechanism.

[0023] Figure 7 This is a schematic diagram of the clamping structure.

[0024] 1-Square tube beam; 2-Inner square tube; 3-Drive locking mechanism; 4-Adjusting shim; 5-Quick clamping mechanism; 31-Fixed base one; 32-Screw one; 33-Telescopic drive mechanism; 34-Locking structure; 35-Nut block; 331-Driven gear; 332-Drive gear; 333-Rotating head; 334-Connecting hole one; 341-Locking gear; 342-Locking tooth; 343-Moving block; 344 - Sliding hole; 345 - Spring 1; 346 - Screw; 347 - Connecting hole 2; 348 - Anti-rotation washer; 51 - Fixing block; 52 - Annular groove; 53 - Fixing seat 2; 54 - Clamping structure; 541 - Connecting hole 3; 542 - Guide hole; 543 - Sliding block; 544 - Stud; 545 - Clamping hook; 546 - Transmission gear; 547 - Linkage gear; 548 - Spring 2; 549 - Groove. Detailed Implementation

[0025] like Figure 1 and Figure 2As shown, this specific embodiment adopts the following technical solution: an assembled crane main beam with a self-locking structure, including a square tube beam 1, inner square tubes 2, a drive locking mechanism 3, an adjusting shim 4, and a quick-clamping mechanism 5; there are several square tube beams 1, which serve as the basic load-bearing units of the main beam. The drive locking mechanism 3 is fixedly connected to the interior of one side of each of the several square tube beams 1 by welding, and the quick-clamping mechanism 5 is also fixedly connected to the interior of the other side by welding; there are several inner square tubes 2, whose outer diameter matches the inner diameter of the square tube beam 1, and the outer surfaces of the several inner square tubes 2 are movably fitted onto corresponding... The inner side of one side of the square tube beam 1 can slide along the axial direction of the square tube beam 1. One side of each of the inner square tubes 2 is connected to the corresponding drive locking mechanism 3, and its movement is controlled by the drive locking mechanism 3. The other side is connected to the corresponding quick clamping mechanism 5 to achieve quick fixation. There are several adjusting shims 4, which are made of wear-resistant metal material. The several adjusting shims 4 are respectively clamped between two adjacent square tube beams 1. The inner side of each adjusting shim 4 is respectively sleeved on the outside of the corresponding inner square tube 2, which does not affect the sliding of the inner square tube 2, and can fill the gap between adjacent square tube beams 1.

[0026] like Figure 3 As shown, the drive locking mechanism 3 includes a fixed base 31, a screw 32, a telescopic drive mechanism 33, a locking structure 34, and a nut block 35. The fixed base 31 is a hollow box-shaped structure, externally fixed to the inside of one side of the square tube beam 1 by bolts. The fixed base 31 has reserved installation space inside, and the telescopic drive mechanism 33 and the locking structure 34 are respectively provided, which are distributed along the axial direction of the screw 32. The screw 32 is externally connected to the inside of the fixed base 31 by bearings, and the rod body is simultaneously connected to the telescopic drive mechanism 33 and the locking structure 34, and is driven and locked by them respectively. The nut block 35 is a block structure with internal threads, externally fixed to the inside of one side of the inner square tube 2 by welding. The threaded hole in the center of the nut block 35 is threadedly connected to the screw 32. When the screw 32 rotates, it can drive the nut block 35 and the inner square tube 2 to move synchronously.

[0027] like Figure 4As shown, the telescopic drive mechanism 33 includes a driven gear 331, a driving gear 332, a rotating head 333, and a connecting hole 334. The driven gear 331 is movably connected to the inside of the fixed base 31 via a bearing, and its central hole is fixedly connected to the outside of the screw 32 with an interference fit, rotating synchronously with the screw 32. The driving gear 332 is movably connected to the upper side of the fixed base 31 via a rotating shaft, and its teeth mesh with the teeth of the driven gear 331 to form a speed reduction transmission structure. The upper central shaft of the driving gear 332 passes through the top of the fixed base 31, and the rotating head 333 is fixedly connected to its end. An internal hexagonal hole is opened in the center of the outer side of the rotating head 333 to facilitate the fitting of an internal hexagonal wrench. The connecting hole 334 is located directly above the rotating head 333, opened on the upper side of the square tube beam 1, and its diameter is slightly larger than the diameter of the internal hexagonal wrench to ensure that the wrench can be smoothly inserted into the rotating head 333.

[0028] like Figure 5 As shown, the locking structure 34 includes a locking gear 341, a locking tooth 342, a movable block 343, a sliding hole 344, a spring 345, a screw 346, a connecting hole 347, and an anti-rotation washer 348. The locking gear 341 is movably connected to the inside of the fixed base 31 via a bearing, located on one side of the driven gear 331. Its central hole is fixedly connected to the outside of the screw 32 via an interference fit, and rotates synchronously with the screw 32. The sliding hole 344 is a vertically opened rectangular hole located directly above the locking gear 341, and is opened on the upper side inside the fixed base 31. The movable block 343 is a rectangular block adapted to the sliding hole 344, and its outer side is vertically slidably connected to the inside of the sliding hole 344. The bottom of the movable block 343 is integrally formed with locking teeth. 342, the tooth profile of locking tooth 342 matches the upper gear teeth of locking gear 341, and in its natural state it meshes with the upper side of locking gear 341. A spring 345 is provided between the upper middle part of the movable block 343 and the upper side of the sliding hole 344. The spring 345 is always in a compressed state, providing a downward force to the movable block 343. The screw 346 is an internal hexagon screw, and its lower external thread is threaded to the internal thread hole opened on the upper side of the movable block 343. An anti-rotation washer 348 is provided between the upper stepped surface of the screw 346 and the top of the sliding hole 344 to prevent the screw 346 from loosening. The second connecting hole 347 is located directly above the sliding hole 344, opened on the upper side of the square tube beam 1, and its diameter is adapted to an internal hexagon wrench for easy operation of the screw 346.

[0029] The screw 346 is a standard internal hexagonal head screw, the length of which can be adjusted according to the depth of the sliding hole 344 to ensure that the movable block 343 can be stably raised and lowered when screwed.

[0030] like Figure 6As shown, the quick clamping mechanism 5 includes a fixing block 51, an annular groove 52, a second fixing seat 53, and a clamping structure 54. The fixing block 51 is a cylindrical structure, which is fixedly connected to the opening on the other side of the inner square tube 2 by welding and is coaxially arranged with the inner square tube 2. The outer side of the fixing block 51 has an annular groove 52 along the circumferential direction, and the groove cross-section is trapezoidal. The second fixing seat 53 is a hollow cylindrical structure, which is internally connected to the inside of the square tube beam 1 and externally fixedly connected to the inside of the square tube beam 1 on the other side by welding. The second fixing seat 53 has a clamping structure 54 near the opening. The clamping component of the clamping structure 54 can extend into the annular groove 52 to achieve a clamping connection with the annular groove 52.

[0031] like Figure 7 As shown, the clamping structure 54 includes a connecting hole 541, a guide hole 542, a slider 543, a stud 544, a clamping hook 545, a transmission gear 546, a linkage gear 547, a spring 548, and a groove 549. Several guide holes 542 are evenly distributed around the perimeter of the fixing base 53, arranged horizontally. A stud 544 is movably connected to the center of each guide hole 542. The outer end of the stud 544 extends to the outside of the guide hole 542, and the inner end passes through… A key is fixedly connected to a transmission gear 546; the linkage gear 547 is movably connected to the center of the fixed base 53 via a rotating shaft, meshing with the teeth of all the transmission gears 546 to form a synchronous transmission structure, rotating one stud 544 will drive all studs 544 to rotate synchronously; there are several clamping hooks 545, corresponding one-to-one with the guide holes 542, and one side of each clamping hook 545 is movably connected to the inside of the corresponding guide hole 542, and the inside of one side of each clamping hook 545 is connected to... The corresponding studs 544 are externally slidably connected, and the hooks on the other side of several clamping hooks 545 are adapted to the interior of the annular grooves 52, all extending into the annular grooves 52 to achieve clamping; the grooves 549 are located inside the clamping hooks 545 and are formed inside the fixing base 53. Springs 548 are provided between the grooves 549 and the corresponding inner sides of the clamping hooks 545. The springs 548 are always in a compressed state, providing an outward thrust to the clamping hooks 545 and enhancing the clamping force; the sliding... There are several blocks 543, each corresponding to a guide hole 542. Several of the sliders 543 are externally slidably connected to the inside of the corresponding guide hole 542. The threaded holes in the center are threadedly connected to the corresponding studs 544. When the studs 544 rotate, they can drive the sliders 543 to slide along the guide hole 542. There are several connecting holes 541, each corresponding to a stud 544. They are located on the outside of the corresponding studs 544 and are opened on the outer perimeter of the square tube beam 1. The hole diameter is adapted to an internal hex wrench for easy operation of the studs 544.

[0032] The stud 544 has an internal hexagonal hole at its outer end, which is the same as the internal hexagonal hole of the screw 346, allowing it to be operated with the same internal hexagonal wrench, thus improving the ease of operation.

[0033] The invention is used in the following ways: It has a reasonable and simple structure, low production cost, convenient installation, and complete functions. In use, first, select the corresponding number of square tube beams 1 and adjusting shims 4 of appropriate thickness according to the length of the main beam. Here, the square tube beams 1 are the basic components constituting the main beam of the crane. Multiple square tube beams 1 are spliced ​​to form the main frame of the main beam, bearing the main load during crane operation and providing an installation carrier for other components. Each square tube beam 1 has a drive locking mechanism 3 fixedly connected to one side and a quick-clamping mechanism 5 fixedly connected to the other side. These two mechanisms, in conjunction with the inner square tubes 2, achieve the connection and fixation of adjacent square tube beams 1. The number of inner square tubes 2 corresponds to the number of square tube beams 1, and each inner square tube 2 is externally movably connected to a corresponding square tube beam 1. Inside the square tube 2, the inner square tube 2 can move axially within the square tube beam 1, thereby adjusting the overall length of the main beam to meet the requirements of different operating scenarios. Simultaneously, one side of the inner square tube 2 is connected to the corresponding drive locking mechanism 3, and the other side is connected to the corresponding quick-clamping mechanism 5. After adjustment, these two mechanisms fix the tube in place, providing stable connection support for adjacent square tube beams 1 and enhancing the overall stability of the main beam structure. The drive locking mechanism 3 consists of a fixed base 31, a screw 32, a telescopic drive mechanism 33, a locking structure 34, and a nut block 35. It is used to drive the inner square tube 2 to move and achieve locking. The fixed base 31 is externally fixedly connected to the inside of one side of the square tube beam 1, providing mounting space for the telescopic drive mechanism 33 and the locking structure 34. The basic structure includes: a screw 32 externally connected to the inside of a fixed base 31, and connected to the telescopic drive mechanism 33 and the locking structure 34; a nut block 35 externally fixed to the inside of the inner square tube 2, with its central threaded hole engaging with the screw 32; the telescopic drive mechanism 33 includes a driven gear 331, a driving gear 332, a rotating head 333, and a connecting hole 334; the driven gear 331 is movably connected to the inside of the fixed base 31, with its central interior fixed to the outside of the screw 32; the driving gear 332 is movably connected to the upper side of the fixed base 31, meshing with the driven gear 331; the rotating head 333 is fixed to the central shaft on the upper side of the driving gear 332; and an internal hexagonal hole is opened in the center of the outer side of the rotating head 333; the connecting hole 334 is located in the rotating head 332. The rotating head 333 is located on the outer side of the square tube beam 1. A tool is inserted into the hexagonal hole of the rotating head 333 through the connecting hole 334. Rotating the rotating head 333 drives the driving gear 332 to rotate. The driving gear 332 drives the driven gear 331 to rotate, which in turn drives the screw 32 to rotate. The screw 32 cooperates with the nut block 35 to drive the inner square tube 2 to move inside the square tube beam 1, thereby realizing the adjustment of the main beam length. The locking structure 34 includes a locking gear 341, a locking tooth 342, a movable block 343, a sliding hole 344, a spring 345, a screw 346, a connecting hole 347, and an anti-rotation washer 348. The screw 346 is an internal hexagonal screw. The locking gear 341 is movably connected inside the fixed seat 31 and is fixed to the outside of one side of the screw 32.The sliding hole 344 is located above the locking gear 341 and is opened inside the upper side of the fixed seat 31. The outer side of the movable block 343 is vertically connected to the inside of the sliding hole 344, and a locking tooth 342 is provided at the bottom, which meshes with the upper side of the locking gear 341. A spring 345 is provided between the upper side of the movable block 343 and the upper side of the inside of the sliding hole 344. The lower external thread of the screw 346 is connected to the upper internal thread of the movable block 343, and an anti-rotation washer 348 is provided between the upper stepped surface of the screw 346 and the top of the sliding hole 344. The connecting hole 347 is located outside the sliding hole 344 and is opened on the upper side of the square tube beam 1. When adjusting the position of the inner square tube 2, the screw 346 is turned through the connecting hole 347 with a tool, which drives the movable block 343 to move upward, compressing the spring 345. Locking teeth 342 and locking gear 341 separate, releasing the lock on screw 32. After the inner square tube 2 is adjusted to the correct position, screw 346 is turned in the opposite direction, spring 345 returns to its original position, pushing movable block 343 downward. Locking teeth 342 and locking gear 341 mesh, locking screw 32 and achieving self-locking of the driving locking mechanism 3. This ensures the stability and safety of the main beam after its length is fixed. Adjusting shims 4 are located between two adjacent square tube beams 1 and are fitted inside the corresponding inner square tube 2. When adjacent square tube beams 1 are spliced, if there is a small gap due to manufacturing errors or installation requirements, adjusting shims 4 of different thicknesses can be added between adjacent square tube beams 1 to compensate for the gap. At the same time, the dimensional accuracy of the main beam after splicing can be finely adjusted to ensure the stability and safety of the adjacent square tube beams 1. The tight connection enhances the flatness and stability of the overall main beam structure. The quick-clamping mechanism 5 consists of a fixed block 51, an annular groove 52, a second fixed seat 53, and a clamping structure 54. It is used to achieve quick connection and separation between the inner square tube 2 and the square tube beam 1. The fixed block 51 is fixedly connected to the opening on the other side of the inner square tube 2, and an annular groove 52 is provided on the outer side. The second fixed seat 53 is externally fixedly connected to the inside of the other side of the square tube beam 1, and a clamping structure 54 is provided inside. The clamping structure 54 is connected to the annular groove 52. The clamping structure 54 includes a connecting hole 541, a guide hole 542, a slider 543, a stud 544, a clamping hook 545, a transmission gear 546, a linkage gear 547, a second spring 548, and a groove 549. The outer end of the stud 544... Multiple guide holes 542 are formed around the inside of the second fixed base 53, with a stud 544 movably connected to the center of each guide hole 542. A transmission gear 546 is fixedly connected to the inner end of the stud 544. A linkage gear 547 is movably connected inside the center of the second fixed base 53 and meshes with all the transmission gears 546. The number of clamping hooks 545 corresponds to the number of guide holes 542. One side of each hook is movably connected to the inner side of the corresponding guide hole 542, and the other side of each hook is movably connected to the outer side of the corresponding stud 544. The hooks on the other side are all engaged with the inside of the annular groove 52. A groove 549 is located inside the clamping hook 545 and is formed inside the second fixed base 53. A spring 548 is provided between the groove 549 and the inner side of the corresponding clamping hook 545.The number of sliders 543 corresponds to the number of guide holes 542, and they are externally movably connected to the corresponding guide holes 542. The central threaded holes are respectively connected to the corresponding studs 544. The number of connecting holes 541 corresponds to the number of studs 544, and they are located on the outside of the corresponding studs 544, and are opened around the outer perimeter of the square tube beam 1. When the inner square tube 2 moves to the designated position, the locking hook 545 will overcome the spring 548 and cause its other hook to engage in the annular groove 52 of the fixing block 51, thereby achieving quick locking and fixing of the inner square tube 2 and the square tube beam 1. After locking and fixing, a tool is inserted into the hexagonal hole of the rotating head 333 through the connecting hole 334. Rotating the rotating head 333 drives the drive gear 332 to rotate, causing the inner square tube 2 to move inside the square tube beam 1, thereby... The ability to tightly connect adjacent square tube beams 1 ensures reliability and stability during operation. A tool is inserted into the inner hexagonal hole on the outside of stud 544 through the connecting hole 3 541. Rotating stud 544 drives the transmission gear 546 to rotate, which in turn drives the linkage gear 547. The linkage gear 547 then drives all transmission gears 546 to rotate synchronously, causing all studs 544 to rotate synchronously. The studs 544 cooperate with the slider 543, pushing it along the guide hole 542. The slider 543 then causes the locking hook 545 to separate from the annular groove 52, thus achieving rapid separation of the inner square tube 2 from the square tube beam 1. This facilitates the disassembly of adjacent square tube beams 1, thereby improving the efficiency of main beam assembly and disassembly.

[0034] In the description of this invention, it should be understood that the terms "coaxial," "bottom," "one end," "top," "middle," "other end," "upper," "side," "top," "inner," "front," "center," "both ends," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0035] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the present invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope. All such changes and modifications fall within the scope of the present invention as claimed, which is defined by the appended claims and their equivalents.

[0037] The control method of this invention is to control the device by manually starting and stopping the switch. The wiring diagram of the power element and the supply of power are common knowledge in the field. Since this invention is mainly used to protect mechanical devices, the control method and wiring layout will not be explained in detail.

Claims

1. An assembled crane girder with self-locking structure, characterized in that: It include square tube beam (1), inner square tube (2), drive locking mechanism (3), adjusting gasket (4) and quick clamping mechanism (5); The square tube beam (1) is a plurality of, a plurality of the square tube beam (1) one side inside is fixedly connected with drive locking mechanism (3), a plurality of the square tube beam (1) the other side inside is fixedly connected with quick clamping mechanism (5); The inner square tube (2) is a plurality of, a plurality of the inner square tube (2) outside is movably connected in the corresponding square tube beam (1) one side inside, a plurality of the inner square tube (2) one side is connected with the corresponding drive locking mechanism (3), a plurality of the inner square tube (2) the other side is connected with the corresponding quick clamping mechanism (5) respectively; The adjusting gasket (4) is a plurality of, a plurality of the adjusting gasket (4) is located between the two adjacent square tube beam (1), a plurality of the adjusting gasket (4) inside is located in the corresponding inner square tube (2) outside respectively; The drive locking mechanism (3) includes fixed seat one (31), screw one (32), telescopic drive mechanism (33), locking structure (34) and nut block (35); The fixed seat one (31) outside is fixedly connected in the square tube beam (1) one side inside, the fixed seat one (31) inside is equipped with telescopic drive mechanism (33) and locking structure (34); The screw one (32) one side outside is movably connected in the fixed seat one (31) inside and is connected with telescopic drive mechanism (33) and locking structure (34); The nut block (35) outside is fixedly connected in the inner square tube (2) one side inside, the threaded hole of the nut block (35) centrally arranged is connected with screw one (32); The locking structure (34) includes locking gear (341), locking teeth (342), movable block (343), sliding hole (344), spring one (345), screw (346), communication hole two (347) and rotation stop washer (348); The locking gear (341) is movably connected in the fixed seat one (31) inside, the locking gear (341) inside is fixedly connected with screw one (32) one side outside; The sliding hole (344) is located in the upper side of locking gear (341) and is arranged in the upper side of fixed seat one (31) inside; The movable block (343) outside is movably connected in the sliding hole (344) inside vertically, the movable block (343) bottom is equipped with locking teeth (342), and the locking teeth (342) are connected with the upper side of locking gear (341), and the spring one (345) is arranged between the upper side of the movable block (343) and the upper side of the sliding hole (344) inside; The lower side external thread of the screw (346) is connected with the inner thread of the movable block (343) upper side, and the rotation stop washer (348) is arranged between the screw (346) upper side step surface and the sliding hole (344) top; The communication hole two (347) is located in the outer side of sliding hole (344), and the communication hole two (347) is arranged in the upper side of square tube beam (1); The quick clamping mechanism (5) includes fixed block (51), annular clamping groove (52), fixed seat two (53) and clamping structure (54); The fixed block (51) is fixedly connected at the other side opening of the inner square tube (2), and an annular clamping groove (52) is formed on the outer side of the fixed block (51); The second fixed seat (53) is fixedly connected to the other side of the square tube beam (1) on the inside, and the second fixed seat (53) is internally provided with a clamping structure (54) connected with the annular clamping groove (52); The clamping structure (54) comprises a communication hole three (541), a guide hole (542), a sliding block (543), a stud (544), a clamping hook body (545), a transmission gear (546), a linkage gear (547), a spring two (548) and a groove (549); The guide hole (542) is a plurality of guide holes (542) formed on the inside of the second fixed seat (53), and a plurality of stud (544) are movably connected in the center of the guide hole (542), and the inner side of the stud (544) is fixedly connected with the transmission gear (546); The linkage gear (547) is movably connected in the center of the second fixed seat (53), and the linkage gear (547) is connected with all the transmission gears (546); The clamping hook body (545) is a plurality of clamping hook bodies (545) movably connected on the inner side of the corresponding guide hole (542) on one side, and movably connected on the outer side of the corresponding stud (544) on the inner side, and the hook part on the other side of the clamping hook body (545) is connected with the inside of the annular clamping groove (52); The groove (549) is located on the inner side of the clamping hook body (545) and is formed in the inside of the second fixed seat (53), and the spring two (548) is arranged between the groove (549) and the inner side of the corresponding clamping hook body (545); The sliding block (543) is a plurality of sliding blocks (543) movably connected on the outside of the corresponding guide hole (542), and the threaded holes arranged in the center of the sliding block (543) are connected with the corresponding stud (544); The communication hole three (541) is a plurality of communication hole threes (541) located on the outer side of the corresponding stud (544), and the communication hole three (541) is formed on the outside of the square tube beam (1).

2. An assembled crane girder with self-locking structure according to claim 1, characterized in that: The telescopic drive mechanism (33) comprises a driven gear (331), a driving gear (332), a rotating head (333) and a communication hole one (334); The driven gear (331) is movably connected in the inside of the first fixed seat (31), and the central inside of the driven gear (331) is fixedly connected with the outer side of the screw rod one (32) on one side; The driving gear (332) is movably connected on the inside of the first fixed seat (31) on the upper side, and the driving gear (332) is connected with the driven gear (331), and the rotating head (333) is fixedly connected on the central shaft on the upper side of the driving gear (332), and the inner hexagonal hole is formed on the outer side of the rotating head (333); The communication hole one (334) is located on the outer side of the rotating head (333) and is formed on the upper side of the square tube beam (1).

3. The assembled crane girder with self-locking structure according to claim 1, characterized in that: The screw (346) is an inner hexagonal screw.

4. The assembled crane girder with self-locking structure according to claim 1, characterized in that: A hexagonal hole is formed in the outer end of the stud (544).

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