A double-girder gantry crane and its anti-tipping structure

Abstract

This invention relates to the field of crane technology and discloses a double-girder gantry crane and its anti-tipping structure. It includes two sets of gantry support columns. A fixed traveling double main girder is mounted above the two gantry support columns. The two gantry support columns are symmetrically distributed on the bottom side of the traveling double main girder. A sliding crane is mounted above the traveling double main girder. Two movable frames are mounted on the bottom side of the gantry support columns, and two movable units are mounted on the bottom side of the movable frames. In this invention, a friction plate is pushed into the gap between the rotating wheel and the guide rail by a guide sleeve. At this time, the limiting block is squeezed inward by the upper surface of the guide rail, further locking the friction plate. Simultaneously, a rotary motor drives a threaded column to press down on the rotating ring, pushing the movable block to squeeze the rotating shaft, forcing the clamping plate to rotate around the third rotating hole and clamp the side of the guide rail. This triple locking forms a three-dimensional constraint, effectively resisting lateral wind loads and slippage / tipping.

Description

Technical Field

[0001] This invention relates to the field of crane technology, and in particular to a double-girder gantry crane and its anti-tipping structure. Background Technology

[0002] Traditional gantry cranes face two major risks when operating outdoors: first, overturning or slipping due to lateral loads in strong winds; and second, structural damage or cargo swaying caused by inertial impact during emergency braking. Existing anti-tipping devices mostly employ simple mechanical locking or independent braking systems, resulting in abrupt braking processes that easily lead to rail wear and structural deformation. Furthermore, foreign objects on the rails (such as gravel or metal shavings) can easily cause vibration in the traveling wheel assembly, accelerating component fatigue. In addition, conventional rail clamps require manual intervention, have a delayed response, and cannot meet the rapid self-locking requirements of sudden strong winds or emergency stops. Therefore, we propose a double-girder gantry crane and its anti-tipping structure. Summary of the Invention

[0003] The present invention mainly addresses the technical problems existing in the prior art, and provides a double main beam gantry crane and its anti-tipping structure.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: an anti-tipping structure for a double-girder gantry crane. This anti-tipping structure includes two sets of gantry support columns. A fixed traveling double main girder is installed above the two gantry support columns. The two gantry support columns are symmetrically distributed on the bottom side of the traveling double main girder. A sliding crane is installed above the traveling double main girder. Two movable frames are installed on the bottom side of the gantry support columns. Two movable units are installed on the bottom side of the movable frames. Each movable unit includes a mounting plate fixedly installed on the bottom side of the movable frame. Two mounting side plates are fixedly installed on the bottom side of the mounting plate. Two fixed mounting seats are installed inside the mounting plate, and rotating wheels are installed inside the mounting seats. A guide rail is fixedly mounted on the ground below the rotating wheel. A rotating friction plate, shaped like an arc, is mounted on the side of the rotating wheel. Sliding guide sleeves are located on both sides of the friction plate. The friction plate is rotatably mounted between the two guide sleeves. A pressing block is fixedly mounted on the upper side of each guide sleeve. A rotating limit block is located between the two guide sleeves. An internally threaded ring slides vertically between the two friction plates. A first connecting post is fixedly mounted on the side of the internally threaded ring. A second connecting block is fixedly mounted on the side of the first connecting post above the two pressing blocks. A sliding plate is located in the middle of the two rotating wheels. A mounting box is fixedly mounted on the upper end of the sliding plate. A rotating clamping plate is located below the sliding plate. A threaded post is connected internally to the internally threaded ring. The column is a circular column with a rectangular groove at the top. A rotary motor is fixedly installed on the bottom side of the mounting plate corresponding to the position of the threaded column. A rotating rod is fixedly installed at the output end of the rotary motor, extending into the interior of the threaded column. A fourth rotating hole is opened at the top of the mounting box. One end of the threaded column extends through the fourth rotating hole into the interior of the mounting box and is fixedly installed with a rotating ring. A moving block is slidably installed inside the mounting box, and the rotating ring is rotatably connected to the moving block. A third rotating hole is opened on the side of the sliding plate, and a rotating shaft is rotatably installed inside the third rotating hole. The side of the mounting box is fixedly connected to the side of the rotating shaft. A pressing plate is fixedly installed on the side of the rotating shaft corresponding to the interior of the mounting box. Two telescopic devices are fixedly installed on the bottom side of the mounting plate, and the output ends of both telescopic devices are fixedly installed with... The device includes two first connecting blocks, with one side of each first connecting block fixed to the outer side of an internal threaded ring. Each of the two guide sleeves has a first rotating hole on one side of each other. A first rotating column is fixedly installed on the side of the friction plate corresponding to the position of the first rotating hole. The first rotating column is rotatably installed inside the first rotating hole. A first torsion spring is fixedly installed on the side of the first rotating column away from the friction plate. The end of the first torsion spring away from the first rotating column is fixedly installed inside the first rotating hole. A fixed guide block is fixedly installed on the side of the mounting side plate corresponding to the position of the guide sleeve. The fixed guide block is an arc-shaped block. The guide sleeve is slidably installed on the fixed guide block. A spring is fixedly installed on the upper end of the fixed guide block. The end of the spring away from the fixed guide block is fixedly installed inside the guide sleeve.Each of the two guide sleeves has a second rotating hole on one side corresponding to the other. A second rotating column is fixedly installed on the side of the limiting block corresponding to the position of the second rotating hole. The second rotating column is rotatably installed inside the second rotating hole. A third torsion spring is fixedly installed on the end face of the second rotating column. The end of the third torsion spring installed on the end face of the second rotating column away from the second rotating column is fixedly installed inside the second rotating hole. When the telescopic device is activated, it drives the first connecting block, the internal threaded ring, the first connecting column, and the second connecting block to move downward. First, the second connecting block squeezes the friction plate and swings. The friction between the friction plate and the rotating wheel decelerates the crane. After the crane stops, the internal threaded ring continues to move downward. The second connecting block drives the guide sleeve to slide on the fixed guide block. The guide sleeve slides along the friction plate until it slides between the rotating wheel and the guide rail. Simultaneously, the limiting block is pressed by the upper side of the guide rail, causing the limiting block to press against the friction plate. At this time, the bottom side of the sliding plate contacts the top of the guide rail. When the sliding plate contacts the upper side of the guide rail, the rotary motor is started. The rotary motor drives the threaded column to rotate inside the internal threaded ring. The threaded column drives the rotating ring to move downward, and the rotating ring drives the moving block to move downward. The moving block presses against the extrusion plate. The extrusion plate drives the clamping plate to rotate via the rotating shaft, and the clamping plate clamps the side of the guide rail.

[0005] Preferably, a rotating swing arm is provided between each of the two corresponding mounting bases, a second connecting post is fixedly installed above the first connecting post between the two swing arms, a road condition monitor is fixedly installed between the two, and a cleaning rod is fixedly installed on the side of the two swing arms.

[0006] Preferably, the swing rod is an "L"-shaped block, and a circular groove is provided on the side of the mounting base corresponding to the center position of the swing rod. A third rotating column is fixedly installed on the side of the swing rod corresponding to the position of the circular groove on the side of the mounting base. The third rotating column is rotatably installed in the circular groove on the side of the mounting base. A rectangular rod is provided on the inner side of the mounting side plate to constrain the counterclockwise swing of the swing rod.

[0007] Preferably, the rotating ring is a cylindrical cylinder with an annular groove on its outer side, and the moving block is a rectangular block with a circular cavity at its center that matches the rotating ring. Beneficial effects

[0008] This invention provides a double-girder gantry crane and its anti-tipping structure. It has the following beneficial effects:

[0009] (1) The anti-tipping structure of this double-girder gantry crane achieves anti-tipping through the stepped locking of the friction plate and the clamping plate. During initial braking, the telescopic device pushes the inner threaded ring downward, causing the second connecting block to squeeze the arc-shaped friction plate, making it tightly adhere to the rotating wheel to generate frictional resistance and achieve flexible deceleration; after complete stop, the inner threaded ring continues to descend, pushing the friction plate into the gap between the rotating wheel and the guide rail through the guide sleeve. At this time, the limit block is squeezed inward by the upper surface of the guide rail and rotates further to lock the friction plate. Simultaneously, the rotary motor drives the threaded column to press down on the rotating ring, pushing the moving block to squeeze the rotating shaft, forcing the clamping plate to rotate around the third rotating hole and clamp the side of the guide rail. The triple locking forms a three-dimensional constraint, effectively resisting lateral wind loads and slippage overturning.

[0010] (2) In the initial braking phase of this double-girder gantry crane, the second connecting block only presses the friction plate to rotate around the first rotating column, achieving smooth deceleration through line contact friction between the arc-shaped surface and the rotating wheel. As it continues to move downward, the second connecting block presses the guide sleeve, causing it to slide along the arc-shaped trajectory of the fixed guide block, pushing the friction plate into the wheel-rail gap. At this time, the limiting block is automatically locked by the reaction force of the guide rail. After the brake is released, the first torsion spring drives the friction plate to rebound, the spring pushes the guide sleeve to reset, and the third torsion spring drives the limiting block to rotate. The entire process requires no manual intervention. This design avoids structural impact caused by sudden braking and extends the life of the rotating wheel and guide rail.

[0011] (3) The anti-tipping structure of this double-girder gantry crane features a road condition monitor that scans the guide rail surface in real time during crane travel. When foreign objects such as gravel or welding slag are detected, the telescopic device pulls the first connecting column upward, pushes the second connecting column upward, and drives the L-shaped swing rod to rotate clockwise around the third rotating column, causing the cleaning rod to swing down to the upper surface of the guide rail. During travel, the cleaning rod sweeps the foreign objects away from the track, preventing the rotating wheel from crushing them and causing vibration of the entire machine. The rectangular rod constrains the swing rod to swing counterclockwise, ensuring that the cleaning rod is suspended in the air when not in operation. This mechanism significantly reduces abnormal vibration and wheel wear caused by foreign objects on the track.

[0012] (4) The anti-tipping structure of this double-girder gantry crane features a multi-mechanism linkage driven by a rotary motor and an expansion joint. The expansion joint serves as the core power source, simultaneously controlling the braking of the internal threaded ring and the cleaning of the first connecting column. The rotary motor, through a rotating rod, links the threaded column, causing the moving block to move downwards and driving the clamping plate to perform clamping actions. The first torsion spring, spring, and third torsion spring provide automatic reset functions, reducing the need for manual adjustments. The pairing of the guide sleeve and the arc-shaped slide rail of the fixed guide block, along with the precision transmission between the internal threaded ring and the threaded column, ensures fast mechanism response and high fault tolerance, significantly improving the reliability of the system under harsh working conditions. Attached Figure Description

[0013] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0014] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0016] Figure 2 This is a partial structural schematic diagram of the mounting plate of the present invention;

[0017] Figure 3 This is a partial structural schematic diagram of the swing arm of the present invention;

[0018] Figure 4 This is a partial structural diagram of the telescopic device of the present invention;

[0019] Figure 5 This is a cross-sectional view of the mounting box of the present invention;

[0020] Figure 6 This is a cross-sectional view of the guide sleeve of the present invention.

[0021] Legend:

[0022] 111. Gantry support column; 112. Traveling double main beam; 113. Crane; 114. Moving frame; 115. Guide rail; 211. Mounting plate; 212. Mounting side plate; 213. Mounting seat; 214. Rotating wheel; 311. Fixed guide block; 312. Guide sleeve; 313. Spring; 314. Pressing block; 315. Friction plate; 316. First rotating hole; 317. First rotating column; 318. First torsion spring; 321. Second rotating hole; 322. Second rotating column; 323. Limiting block; 411. Expansion joint; 412. First connection. 413. Internal threaded ring; 414. First connecting post; 415. Second connecting block; 511. Sliding plate; 512. Mounting box; 513. Fourth rotating hole; 514. Rotating ring; 515. Threaded post; 516. Rotary motor; 517. Rotating rod; 518. Moving block; 519. Third rotating hole; 5110. Rotating shaft; 5111. Extrusion plate; 5112. Clamping plate; 612. Swing rod; 613. Third rotating post; 614. Second torsion spring; 615. Second connecting post; 616. Road condition monitor; 617. Cleaning rod. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] like Figures 1-6 As shown, a double-girder gantry crane includes two sets of gantry support columns 111. A fixed traveling double main girder 112 is mounted above the two gantry support columns 111. The two gantry support columns 111 are symmetrically distributed on the bottom side of the traveling double main girder 112. A sliding crane 113 is mounted above the traveling double main girder 112. Two movable frames 114 are mounted on the bottom side of the gantry support columns 111. Two moving units are mounted on the bottom side of the movable frames 114. Each moving unit includes a fixed... A mounting plate 211 is fixedly installed on the bottom side of the mobile frame 114. Two mounting side plates 212 are fixedly installed on the bottom side of the mounting plate 211. Two fixed mounting seats 213 are provided inside the mounting plate 211. Rotating wheels 214 are provided inside the mounting seats 213. A guide rail 115 is fixedly installed on the ground below the rotating wheels 214. The gantry support column 111 moves above the guide rail 115 through the rotating wheels 214. The crane 113 moves on the traveling double main beam 112.

[0025] like Figures 1-6As shown, an anti-tipping structure for a double-girder gantry crane includes a rotating friction plate 315 on the side of the rotating wheel 214. The friction plate 315 is an arc-shaped block, and sliding guide sleeves 312 are provided on both sides of the friction plate 315. The friction plate 315 is rotatably mounted between the two guide sleeves 312. A pressing block 314 is fixedly mounted on the upper side of the guide sleeve 312. A rotating limiting block 323 is provided between the two guide sleeves 312. An internally threaded ring 413 that slides up and down is provided between the two friction plates 315. A first connecting column 414 is fixedly mounted on the side of the internally threaded ring 413. A second connecting block 415 is fixedly mounted on the side of the first connecting column 414 above the two pressing blocks 314. The middle of the two rotating wheels 214... A sliding plate 511 is positioned at a location where it can slide. An mounting box 512 is fixedly installed at the upper end of the sliding plate 511. A rotating clamping plate 5112 is positioned below the sliding plate 511. A rotating wheel 214 rotates on a guide rail 115. When the crane needs to stop, an internal threaded ring 413 moves downwards, causing the first connecting post 414 and the second connecting block 415 to move downwards. First, the second connecting block 415 presses against the friction plate 315, causing it to swing. The friction between the friction plate 315 and the rotating wheel 214 decelerates the crane. After the crane stops, the second connecting block 415 continues to move, causing the guide sleeve 312 to slide on the fixed guide block 311. The guide sleeve 312 carries the friction plate 311... 15. Slide until the friction plate 315 slides synchronously between the rotating wheel 214 and the guide rail 115. The limiting block 323 is pressed by the upper side of the guide rail 115, which makes the limiting block 323 press against the friction plate 315, improving the braking ability. At this time, the bottom side of the sliding plate 511 contacts the top of the guide rail 115. Then rotate the clamping plate 5112 to clamp the side of the guide rail 115. The pressure of the friction plate 315 on the guide rail 115 and the rotating wheel 214, as well as the clamping of the guide rail 115 by the clamping plate 5112, resist strong winds and prevent slippage and overturning. The internal threaded ring 413 is internally threaded with a threaded post 515. The threaded post 515 is a circular post with a rectangular groove at the top. Mounting plate A rotary motor 516 is fixedly installed on the bottom side of the mounting box 511, corresponding to the position of the threaded post 515. A rotating rod 517 is fixedly installed at the output end of the rotary motor 516, extending into the interior of the threaded post 515. A fourth rotating hole 513 is opened at the upper end of the mounting box 512. One end of the threaded post 515 extends through the fourth rotating hole 513 into the interior of the mounting box 512 and is fixedly installed with a rotating ring 514. A moving block 518 is slidably installed inside the mounting box 512. The rotating ring 514 is rotatably connected to the moving block 518. A third rotating hole 519 is opened on the side of the sliding plate 511. A rotating shaft 5110 is rotatably installed inside the third rotating hole 519. The side of the mounting box 512 is fixedly connected to the side of the rotating shaft 5110.A pressing plate 5111 is fixedly installed on the side of the rotating shaft 5110 corresponding to the inside of the mounting box 512. When the sliding plate 511 contacts the upper side of the guide rail 115, the rotary motor 516 is activated. The rotary motor 516 drives the threaded column 515 to rotate inside the internal threaded ring 413. The threaded column 515 drives the rotating ring 514 to move downward. The rotating ring 514 drives the moving block 518 to move downward. The moving block 518 presses the pressing plate 5111. The pressing plate 5111 drives the clamping plate 5112 to rotate through the rotating shaft 5110, and the clamping plate 5112 clamps the side of the guide rail 115.

[0026] Two telescopic devices 411 are fixedly installed on the bottom side of the mounting plate 211. A first connecting block 412 is fixedly installed at the output end of each telescopic device 411. One side of each first connecting block 412 is fixed to the outer side of the internal threaded ring 413. When the telescopic device 411 is activated, it drives the first connecting block 412, the internal threaded ring 413, the first connecting post 414, and the second connecting block 415 downwards. When the second connecting block 415 moves downwards, it first rotates the friction plate 315. As it continues to move downwards, it compresses the pressing block 314, causing the pressing block 314 to drive the guide sleeve 312 to slide on the fixed guide block 311. A rotating swing rod 612 is provided between each of the two corresponding mounting seats 213. The two swing rods 612 are fixed above the first connecting post 414. A second connecting column 615 is fixedly installed, and a road condition monitor 616 is fixedly installed between the two. The road condition monitor 616 is existing technology and will not be described in detail here. Cleaning rods 617 are fixedly installed on the sides of the two swing arms 612. When the crane travels, the road condition monitor 616 detects the condition of the track. When a foreign object appears on the track, the telescopic device 411 is activated. The telescopic device 411 drives the first connecting column 414 to move upward. The first connecting column 414 presses the second connecting column 615 upward. The second connecting column 615 causes the swing arm 612 to rotate, causing the cleaning rod 617 to move downward. During the travel, the cleaning rod 617 knocks the foreign object on the track away, so as to avoid the situation where the crane vibrates during the travel due to the contact between the foreign object on the guide rail 115 and the rolling mounting seat 213.

[0027] Each of the two guide sleeves 312 has a first rotating hole 316 on one of its corresponding sides. A first rotating column 317 is fixedly installed on the side of the friction plate 315 corresponding to the position of the first rotating hole 316. The first rotating column 317 is rotatably installed inside the first rotating hole 316. A first torsion spring 318 is fixedly installed on the side of the first rotating column 317 away from the friction plate 315. The end of the first torsion spring 318 away from the first rotating column 317 is fixedly installed inside the first rotating hole 316. When the friction plate 315 is pressed by the second connecting block 415, the friction plate 315 swings through the first rotating hole 316 and the first rotating column 317. When the friction plate 315 is not under force, the first torsion spring 318 causes the friction plate 315 to rotate back to its initial position through torsion. A fixed guide block 311 is fixedly installed on the side of the mounting side plate 212 corresponding to the position of the guide sleeve 312. The fixed guide block 311 is an arc-shaped block. The guide sleeve 312 is slidably installed on the fixed guide block 311. A spring 313 is fixedly installed on the upper end of 311. The end of the spring 313 away from the fixed guide block 311 is fixedly installed on the inner side of the guide sleeve 312. When the guide sleeve 312 is squeezed, it slides along the trajectory of the fixed guide block 311. When the guide sleeve 312 is not squeezed, the spring 313 squeezes the guide sleeve 312 to move to the initial position. A second rotating hole 321 is opened on one side of each of the two guide sleeves 312. A second rotating column 322 is fixedly installed on the side of the limiting block 323 corresponding to the position of the second rotating hole 321. The second rotating column 322 is rotatably installed inside the second rotating hole 321. A third torsion spring is fixedly installed on the end face of the second rotating column 322. The end of the third torsion spring installed on the end face of the second rotating column 322 away from the second rotating column 322 is fixedly installed inside the second rotating hole 321. When the limiting block 323 is not under pressure, the third torsion spring fixedly installed on the end face of the second rotating column 322 drives the second rotating column 322 to return to the initial position.

[0028] The swing rod 612 is an "L"-shaped block. A circular groove is provided on the side of the mounting base 213 corresponding to the center position of the swing rod 612. A third rotating column 613 is fixedly installed on the side of the swing rod 612 corresponding to the circular groove on the side of the mounting base 213. The third rotating column 613 is rotatably installed in the circular groove on the side of the mounting base 213. A rectangular rod is provided on the inner side of the mounting side plate 212 to constrain the counterclockwise swing of the swing rod 612. The stability of the swing rod 612 is maintained when it is not subjected to external force by the torque of the second torsion spring 614 and the rectangular rod constraining the counterclockwise swing of the swing rod 612. When the swing rod 612 is squeezed, it will swing clockwise. The rotating ring 514 is a circular cylinder and an annular groove is provided on the outer side of the rotating ring 514. The moving block 518 is a rectangular block and a circular cavity that matches the rotating ring 514 is provided at the center of the moving block 518.

[0029] Working principle of the invention:

[0030] In operation, the gantry support column 111 moves above the guide rail 115 via the rotating wheel 214. The crane 113 moves on the traveling double main beam 112. The rotating wheel 214 rotates on the guide rail 115. When it needs to stop, the internal threaded ring 413 moves downward, driving the first connecting column 414 and the second connecting block 415 downward. First, the second connecting block 415 squeezes the friction plate 315 to swing, and the friction between the friction plate 315 and the rotating wheel 214 slows down the crane. After the crane stops, the second connecting block 415 continues to move, causing the guide sleeve 312 to slide on the fixed guide block 311. 2. The friction plate 315 is slid along until it is between the rotating wheel 214 and the guide rail 115. Simultaneously, the limiting block 323 is pressed against the upper side of the guide rail 115, thus compressing the friction plate 315 and improving braking capability. At this point, the bottom side of the sliding plate 511 contacts the top of the guide rail 115. Then, the clamping plate 5112 is rotated to clamp the side of the guide rail 115. The compression of the guide rail 115 and the rotating wheel 214 by the friction plate 315, along with the clamping of the guide rail 115 by the clamping plate 5112, resists strong winds and prevents slippage and overturning. When the sliding plate 511 contacts the upper side of the guide rail 115, the rotary motor 51 is started. 6. The rotary motor 516 drives the threaded column 515 to rotate inside the internal threaded ring 413. The threaded column 515 drives the rotating ring 514 to move downward. The rotating ring 514 drives the moving block 518 to move downward. The moving block 518 squeezes the extrusion plate 5111. The extrusion plate 5111 drives the clamping plate 5112 to rotate via the rotating shaft 5110. The clamping plate 5112 clamps the side of the guide rail 115. The telescopic device 411 is activated. The telescopic device 411 drives the first connecting block 412, the internal threaded ring 413, the first connecting column 414, and the second connecting block 415 to move downward. When the second connecting block 415 moves downward, it first rotates the friction plate 315. When it continues to move downward... The compression block 314 is compressed, causing the guide sleeve 312 to slide on the fixed guide block 311. During crane movement, the track condition is monitored by the road condition monitor 616. When a foreign object appears on the track, the telescopic device 411 is activated. The telescopic device 411 moves the first connecting column 414 upward, compressing the second connecting column 615 upward. The second connecting column 615 causes the swing rod 612 to rotate, causing the cleaning rod 617 to move downward. During travel, the cleaning rod 617 knocks foreign objects off the track, preventing vibrations caused by foreign objects contacting the rolling mounting seat 213 on the guide rail 115.When the friction plate 315 is pressed by the second connecting block 415, the friction plate 315 swings through the first rotating hole 316 and the first rotating column 317. When the friction plate 315 is not under force, the first torsion spring 318 causes the friction plate 315 to rotate to its initial position through torque. After being pressed, the guide sleeve 312 slides along the trajectory of the fixed guide block 311. When the guide sleeve 312 is not under pressure, the spring 313 presses the guide sleeve 312 to move to its initial position. The third torsion spring fixedly installed on the end face of the second rotating column 322 drives the second rotating column 322 to return to its initial position when the limiting block 323 is not under pressure. The stability of the swing rod 612 is maintained when it is not under external force by the torque of the second torsion spring 614 and the rectangular rod that constrains the counterclockwise swing of the swing rod 612. When the swing rod 612 is pressed, it swings clockwise.

[0031] 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 invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. An anti-tipping structure for a double-girder gantry crane, the anti-tipping structure being used in the crane, the anti-tipping structure comprising gantry support columns (111), characterized in that: There are two sets of gantry support columns (111). A fixed traveling double main beam (112) is set above the two gantry support columns (111). The two gantry support columns (111) are symmetrically distributed on the bottom side of the traveling double main beam (112). A sliding crane (113) is set above the traveling double main beam (112). Two movable frames (114) are set on the bottom side of the gantry support columns (111). Two movable units are set on the bottom side of the movable frames (114). The movable units include a mounting plate (211) fixedly installed on the bottom side of the movable frame (114). Two mounting side plates (212) are fixedly installed on the bottom side of the mounting plate (211). Two fixed mounting seats (213) are set inside the mounting plate (211). The mounting base (213) has a rotating wheel (214) inside. Below the rotating wheel (214) is a guide rail (115) fixedly mounted on the ground. A rotating friction plate (315) is located on the side of the rotating wheel (214). The friction plate (315) is an arc-shaped block. Sliding guide sleeves (312) are provided on both sides of the friction plate (315). The friction plate (315) is rotatably mounted between the two guide sleeves (312). A pressing block (314) is fixedly mounted on the upper side of the guide sleeves (312). A rotating limiting block (323) is provided between the two guide sleeves (312). An internally threaded ring (413) slides up and down between the two friction plates (315). The internally threaded ring (413)... A first connecting post (414) is fixedly installed on the side. A second connecting block (415) is fixedly installed on the side of the first connecting post (414) above the two extrusion blocks (314). A sliding plate (511) is provided in the middle of the two rotating wheels (214). An installation box (512) is fixedly installed on the upper end of the sliding plate (511). A rotating clamping plate (5112) is provided below the sliding plate (511). A threaded post (515) is connected to the internal thread of the internal threaded ring (413). The threaded post (515) is a circular post with a rectangular groove at the upper end. A rotary motor (516) is fixedly installed on the bottom side of the installation plate (211) at the position corresponding to the threaded post (515). The output of the rotary motor (516) is... A rotating rod (517) is fixedly installed at one end, extending into the interior of a threaded post (515). A fourth rotating hole (513) is provided at the upper end of the mounting box (512). One end of the threaded post (515) extends through the fourth rotating hole (513) into the interior of the mounting box (512) and is fixedly installed with a rotating ring (514). A moving block (518) is slidably installed inside the mounting box (512). The rotating ring (514) is rotatably connected to the moving block (518). A third rotating hole (519) is provided on the side of the sliding plate (511). A rotating shaft (5110) is rotatably installed inside the third rotating hole (519). The side of the mounting box (512) is fixedly connected to the side of the rotating shaft (5110).A pressing plate (5111) is fixedly installed on the side of the rotating shaft (5110) corresponding to the inside of the mounting box (512). Two telescopic devices (411) are fixedly installed on the bottom side of the mounting plate (211). A first connecting block (412) is fixedly installed on the output end of each of the two telescopic devices (411). One side of each of the two first connecting blocks (412) is fixed to the outside of the internal thread ring (413). A first rotating hole (316) is opened on one side of each of the two guide sleeves (312). A first rotating column (317) is fixedly installed on the side of the friction plate (315) corresponding to the position of the first rotating hole (316). The first rotating column (317) is rotatably installed inside the first rotating hole (316). A first torsion spring (318) is fixedly installed on the side of the rotating column (317) away from the friction plate (315). The end of the first torsion spring (318) away from the first rotating column (317) is fixedly installed on the inner side of the first rotating hole (316). A fixed guide block (311) is fixedly installed on the side of the mounting plate (212) corresponding to the position of the guide sleeve (312). The fixed guide block (311) is an arc-shaped block. The guide sleeve (312) is slidably installed on the fixed guide block (311). A spring (313) is fixedly installed on the upper end of the fixed guide block (311). The end of the spring (313) away from the fixed guide block (311) is fixedly installed on the inner side of the guide sleeve (312). The two guide sleeves (312) are mutually corresponding to each other. A second rotating hole (321) is provided on each side. A second rotating column (322) is fixedly installed on the side of the limiting block (323) corresponding to the position of the second rotating hole (321). The second rotating column (322) is rotatably installed inside the second rotating hole (321). A third torsion spring is fixedly installed on the end face of the second rotating column (322). The end of the third torsion spring installed on the end face of the second rotating column (322) away from the second rotating column (322) is fixedly installed inside the second rotating hole (321). When the telescopic device (411) is activated, the telescopic device (411) drives the first connecting block (412), the internal threaded ring (413), the first connecting column (414), and the second connecting block (415) to move downward. First, the second connecting block (412) moves downward. 5) The friction plate (315) is squeezed and oscillated. The friction between the friction plate (315) and the rotating wheel (214) is used to decelerate the crane. After the crane stops, the internal threaded ring (413) continues to descend. The second connecting block (415) drives the guide sleeve (312) to slide on the fixed guide block (311). The guide sleeve (312) slides the friction plate (315) until the friction plate (315) is slid between the rotating wheel (214) and the guide rail (115). At the same time, the limiting block (323) is squeezed by the upper side of the guide rail (115), so that the limiting block (323) squeezes the friction plate (315). At this time, the bottom side of the sliding plate (511) contacts the top of the guide rail (115).When the sliding plate (511) contacts the upper side of the guide rail (115), the rotary motor (516) is activated. The rotary motor (516) drives the threaded column (515) to rotate inside the internal threaded ring (413). The threaded column (515) drives the rotating ring (514) to move downward. The rotating ring (514) drives the moving block (518) to move downward. The moving block (518) squeezes the extrusion plate (5111). The extrusion plate (5111) drives the clamping plate (5112) to rotate through the rotating shaft (5110). The clamping plate (5112) clamps the side of the guide rail (115).

2. The anti-tipping structure of a double-girder gantry crane according to claim 1, characterized in that: A rotating swing arm (612) is provided between each of the two corresponding mounting bases (213). A second connecting post (615) is fixedly installed above the first connecting post (414) between the two swing arms (612). A road condition monitor (616) is fixedly installed between the two. A cleaning rod (617) is fixedly installed on the side of the two swing arms (612).

3. The anti-tipping structure of a double-girder gantry crane according to claim 2, characterized in that: The swing rod (612) is an "L"-shaped block. A circular groove is provided on the side of the mounting base (213) corresponding to the center position of the swing rod (612). A third rotating column (613) is fixedly installed on the side of the swing rod (612) corresponding to the position of the circular groove on the side of the mounting base (213). The third rotating column (613) is rotatably installed in the circular groove on the side of the mounting base (213). A rectangular rod is provided on the inner side of the mounting side plate (212) to constrain the counterclockwise swing of the swing rod (612).

4. The anti-tipping structure of a double-girder gantry crane according to claim 3, characterized in that: The rotating ring (514) is a cylindrical cylinder and an annular groove is provided on the outer side of the rotating ring (514). The moving block (518) is a rectangular block and a circular cavity adapted to the rotating ring (514) is provided at the center of the moving block (518).

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