Windproof and anti-swing crane

Abstract

The application discloses a windproof and swing-preventing crane, which comprises a crane body and a windproof and swing-preventing device, wherein the crane body walks on a trolley rail through crane outriggers; the windproof and swing-preventing device comprises a mounting base connected with the crane outriggers; the windproof and swing-preventing device further comprises a rail pressing assembly which is slidably arranged on the mounting base and is used for pressing the trolley rail; the rail pressing assembly comprises a rail pressing base, an elastic rail pressing assembly and a rigid rail pressing assembly; the windproof and swing-preventing device further comprises two rail clamping assemblies, one of which is arranged on the left side of the rail pressing assembly and the other of which is arranged on the right side of the rail pressing assembly; the rail clamping assemblies are driven by the rail pressing assembly and are used for clamping the trolley rail. The windproof and swing-preventing crane can realize two-stage stopping effect through the rail pressing device and can realize clamping and fixing effect through the rail clamping device.

Description

Technical Field

[0001] This application relates to the field of mechanical technology, specifically to a windproof and anti-sway crane. Background Technology

[0002] A gantry crane is a bridge-type crane whose frame is supported on ground rails by two outriggers. Structurally, it consists of a gantry frame, a trolley traveling mechanism, a hoist, and lifting devices. During operation, gantry cranes may experience excessive swaying in strong winds.

[0003] First, when encountering crosswinds, the lifting equipment may sway or even swing back and forth, increasing the load on the drum and greatly reducing the stability of the lifting equipment during the lifting process. This can easily damage the wire rope and the lifted items, and also affect the efficiency of the equipment being lowered to a fixed point.

[0004] Secondly, if there is a strong wind in the same direction as the track, the crane's outriggers will also slide along the track. If hoisting operations are still being carried out at this time, it will put the operator and the crane in an unsafe working condition.

[0005] There are several common wind-resistant devices in the existing technology: anchoring devices, manual rail clamps, wind-resistant cables, wheel stoppers and rail clamps, and wind-resistant locking devices with claws.

[0006] A single rail clamp increases the compressive stress and friction on the rail, providing some resistance to slippage in strong winds in the same direction as the rail. However, it is ineffective against swaying in crosswinds perpendicular to the rail direction. Therefore, it is necessary to design a windproof and anti-sway device that can function against strong winds in all directions, as well as a crane equipped with such a device. Summary of the Invention

[0007] A wind-resistant and sway-resistant crane includes a crane body and a wind-resistant and sway-resistant device, wherein the crane body travels on a trolley rail via crane outriggers.

[0008] The windproof and anti-sway device includes a mounting base connected to the crane outriggers;

[0009] The mounting base includes a mounting housing fixed to the crane outriggers, a longitudinal slide rail formed within the mounting housing, and at least two telescopic components provided within the longitudinal slide rail;

[0010] As a further implementation, the telescopic component is a motor-driven lead screw.

[0011] As a further embodiment, the telescopic component is a hydraulic rod.

[0012] The windproof and anti-sway device also includes a rail clamping assembly, which is slidably mounted on the mounting base and used to clamp the trolley rails.

[0013] The rail clamping assembly includes a rail clamping base and an elastic rail clamping assembly;

[0014] The rail foundation includes a rail housing that can be slidably inserted into a longitudinal slide rail, and a front-to-back through-type pressure groove formed at the lower end of the rail housing. A limiting slide rail is provided on the left and right sides of the pressure groove. The rail foundation also includes a narrow-diameter upper opening formed at the upper end of the pressure groove, and an upper transmission cavity formed above the narrow-diameter upper opening. A longitudinal transmission cavity is provided on the left and right sides below the upper transmission cavity. A rail clamping slide rail communicating with the pressure groove is provided below the longitudinal transmission cavity.

[0015] The elastic pressure rail assembly includes a pressure plate that passes through the narrow diameter upper opening. The pressure plate has active racks on its left and right sides. The elastic pressure rail assembly also includes a pressure spring that is wound around the pressure plate and a pressure rail retaining ring formed at the lower end of the pressure plate. The pressure rail retaining ring has a limiting plug that is inserted and cooperates with the limiting slide on its left and right sides.

[0016] One embodiment of the limiting plug is as follows:

[0017] The limiting plug includes a fixed outer cylinder formed below the pressure rail retaining ring, a locking protrusion formed at the lower end of the inner wall of the fixed outer cylinder, a rotatable rotating inner cylinder disposed inside the fixed outer cylinder, an anti-detachment protrusion formed on the upper edge of the outer wall of the rotating inner cylinder and rotatably locked above the locking protrusion, and a flat threaded disc formed on the lower edge of the anti-detachment protrusion. The fixed outer cylinder is provided with a fixed mandrel on the left and right sides respectively. The limiting plug also includes a sliding insert sleeve that is slidably sleeved on the fixed mandrel and a sliding plug formed below the sliding insert sleeve and meshing with the flat threaded disc.

[0018] The pressure rail assembly also includes a rigid pressure rail assembly, which includes a pressure rail channel formed on the lower end of the pressure plate, a channel side hole formed on the side of the pressure rail channel, a transverse connecting rod formed on the inner wall of the narrow diameter upper opening and passing through the channel side hole, and a rigid pressure shaft formed below the transverse connecting rod and inserted into the pressure rail channel.

[0019] The transverse connecting rod is detachably connected to the narrow-diameter upper opening;

[0020] The transverse connecting rod includes a connecting rod insertion hole on the inner wall of the narrow-diameter upper opening, a connecting rod transverse hole that transversely penetrates the rigid pressure shaft, a connecting rod end that is slidably inserted into the connecting rod transverse hole, an interlaced insert plate formed on the side of the connecting rod end, a driven inclined surface formed on the lower edge of the interlaced insert plate, and an external threaded rod screwed into the middle of the rigid pressure shaft and abutting against the driven inclined surface. There are two connecting rod ends, two interlaced insert plates, and two driven inclined surfaces, which are symmetrically distributed. The interlaced insert plates on the side of the connecting rod end are interlaced with each other.

[0021] As a further implementation scheme, a tension spring is provided between the ends of the two links to achieve mutual proximity of the ends of the two links in their normal state.

[0022] The windproof and anti-sway device also includes a rail clamping assembly, of which there are two. One rail clamping assembly is provided on the left and right sides of the rail pressing assembly. The rail clamping assembly is driven by the rail pressing assembly and is used to clamp the rails of the trolley.

[0023] Two rail clamping assemblies are provided, and one rail clamping assembly is provided on the left and one on the right of the rail pressing assembly. The rail clamping assembly includes:

[0024] The transmission gear is rotatably located in the upper transmission cavity and meshes with the corresponding drive rack;

[0025] The transmission rack includes a rack spindle disposed in the upper transmission cavity, a rack body slidably sleeved on the rack spindle, and a release slide formed at the rear end of the rack body;

[0026] The movable clamping arm includes a clamping arm spindle disposed in the clamping rail slide, a clamping arm body slidably sleeved on the clamping arm spindle, a clamping arm stop block formed on the front end of the clamping arm body and stopped by the rack body, and a clamping arm compression spring wound around the clamping arm spindle and abutting against the clamping arm body. The clamping arm stop block can slide laterally across the release slide.

[0027] Beneficial effects:

[0028] The wind-resistant and anti-sway crane described in this case has a rail-pressing device that can achieve a two-stage braking effect:

[0029] The elastic and rigid rail clamping devices described in this case can compress the top of the trolley rails, effectively increasing the sliding friction along the rail direction, and can achieve two-stage braking effects depending on different wind forces.

[0030] Furthermore, the elastic pressure rail assembly and the rigid pressure rail assembly are easy to disassemble and install:

[0031] First, retract the limiting plug of the elastic pressure rail assembly to release it from the limiting slide;

[0032] Then, rotate the external threaded rod to make it move downwards. The driven inclined surface loses its compressive stress, and the tension spring drives the staggered insert plate and the end of the connecting rod to move closer to each other, thus releasing the lock from the connecting rod insertion hole.

[0033] The windproof and anti-sway crane described in this case can laterally clamp the trolley rails to prevent the trolley from swaying due to crosswinds.

[0034] The active rack drives the transmission gear to rotate; the transmission gear drives the rack body and the release slide to move downward until the release slide is aligned with the clamping arm stop. The clamping arm body and the clamping arm stop move to the left under the action of the clamping arm compression spring and clamp the side of the trolley rail. Attached image description:

[0035] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of one embodiment of the windproof and anti-sway device.

[0037] Figure 2 This is a schematic diagram of one embodiment of the windproof and anti-sway device.

[0038] Figure 3 This is a cross-sectional schematic diagram of one embodiment of the rail pressing device and the rail clamping device.

[0039] Figure 4 This is a half-sectional schematic diagram of one embodiment of the rail pressing device and the rail clamping device.

[0040] Figure 5 This is a schematic diagram of one embodiment of the rail pressing device.

[0041] Figure 6 yes Figure 3 An enlarged schematic diagram of one embodiment of part A.

[0042] Figure 7 yes Figure 3 An enlarged schematic diagram of another embodiment of part A.

[0043] Figure 8 yes Figure 3 An enlarged schematic diagram of one embodiment of part A.

[0044] Figure 9 yes Figure 3 An enlarged schematic diagram of another embodiment of part A.

[0045] Figure 10 yes Figure 8 Enlarged schematic diagram of section B in the middle.

[0046] Figure 11 A schematic diagram of one embodiment of the connecting rod end and the staggered insert plate.

[0047] In the picture:

[0048] m. Rails for large vehicles;

[0049] 1. Installation foundation; 11. Installation housing; 12. Longitudinal slide rail; 13. Telescopic assembly;

[0050] 2. Rail clamping assembly;

[0051] 21. Rail foundation, 21a. Rail housing, 21b. Lower groove for pressing, 21c. Limiting slide, 21d. Narrow diameter upper opening, 21e. Upper transmission cavity, 21f. Longitudinal transmission cavity, 21g. Rail clamping slide;

[0052] 22. Elastic pressure rail assembly; 22a. Contact plate; 22b. Drive rack; 22c. Contact spring; 22d. Pressure rail retaining ring; 22e. Fiber insert; 22e-1. Fixed outer cylinder; 22e-2. Locking protrusion ring; 22e-3. Rotating inner cylinder; 22e-4. Anti-detachment protrusion ring; 22e-5. Flat threaded disc; 22e-6. Fixed spindle; 22e-7. Sliding insert; 22e-8. Sliding plug;

[0053] 23. Rigid pressure rail assembly; 23a. Pressure rail channel; 23b. Channel side hole; 23c. Transverse connecting rod; 23c-1. Connecting rod insertion hole; 23c-2. Connecting rod transverse hole; 23c-3. Connecting rod end; 23c-4. Staggered insert plate; 23c-5. Driven inclined surface; 23c-6. External threaded rod; 23d. Rigid pressure shaft.

[0054] 3. Clamping rail assembly, 31. Transmission gear, 32. Transmission rack, 32a. Rack spindle, 32b. Rack body, 32c. Release slide, 33. Moving clamping arm, 33a. Clamping arm spindle, 33b. Clamping arm body, 33c. Clamping arm stop, 33d. Clamping arm compression spring. Detailed Implementation

[0055] A wind-resistant and sway-resistant crane includes a crane body and a wind-resistant and sway-resistant device, wherein the crane body travels on a trolley rail via crane outriggers.

[0056] The windproof and anti-sway device includes a mounting base 1, which is connected to the crane outriggers;

[0057] The mounting base 1 includes a mounting housing 11 fixed to the crane outriggers, a longitudinal slide rail 12 formed within the mounting housing 11, and at least two telescopic components 13 provided within the longitudinal slide rail 12;

[0058] As a further implementation, the telescopic component 13 is a motor-driven lead screw.

[0059] As a further implementation, the telescopic component 13 is a hydraulic rod.

[0060] The windproof and anti-sway device also includes a rail pressing assembly 2, which is slidably mounted on the mounting base 1 and used to press down the trolley rail m.

[0061] The rail clamping assembly 2 includes a rail clamping base 21 and an elastic rail clamping assembly 22;

[0062] The rail base 21 includes a rail housing 21a that can be slidably inserted into the longitudinal slide rail 12, and a front-to-back through-groove pressing groove 21b formed at the lower end of the rail housing 21a. A limiting slide rail 21c is provided on the left and right sides of the pressing groove 21b. The rail base 21 also includes a narrow-diameter upper opening 21d formed at the upper end of the pressing groove 21b, and an upper transmission cavity 21e formed above the narrow-diameter upper opening 21d. A longitudinal transmission cavity 21f is provided on the left and right sides below the upper transmission cavity 21e. A rail clamping slide rail 21g communicating with the pressing groove 21b is provided below the longitudinal transmission cavity 21f.

[0063] The elastic pressure rail assembly 22 includes a pressure plate 22a that passes through the narrow diameter upper opening 21d. The pressure plate 22a has active racks 22b on its left and right sides. The elastic pressure rail assembly 22 also includes a pressure spring 22c wound around the pressure plate 22a and a pressure rail retaining ring 22d formed at the lower end of the pressure plate 22a. The pressure rail retaining ring 22d has a limiting plug 22e on its left and right sides that is inserted into the limiting slide 21c.

[0064] One embodiment of the limiting plug-in 22e is as follows:

[0065] The limiting plug 22e includes a fixed outer cylinder 22e-1 formed below the pressure rail retaining ring 22d, a locking protrusion ring 22e-2 formed at the lower end of the inner wall of the fixed outer cylinder 22e-1, a rotating inner cylinder 22e-3 rotatably disposed inside the fixed outer cylinder 22e-1, an anti-detachment protrusion ring 22e-4 formed on the upper edge of the outer wall of the rotating inner cylinder 22e-3 and rotatably locked above the locking protrusion ring 22e-2, and a flat threaded disc 22e-5 formed on the lower edge of the anti-detachment protrusion ring 22e-4. The fixed outer cylinder 22e-1 is provided with a fixed spindle 22e-6 on the left and right sides respectively. The limiting plug 22e also includes a sliding insert 22e-7 slidably sleeved on the fixed spindle 22e-6, and a sliding plug 22e-8 formed below the sliding insert 22e-7 and meshing with the flat threaded disc 22e-5.

[0066] It should be noted that the inner ring of the lower edge of the rail retaining ring 22d is also provided with a contact ring 22d-1. The lower edge of the contact ring 22d-1 is lower than the flat threaded disc 22e-5, directly contacts the trolley rail m, and protects the flat threaded disc 22e-5 from being directly squeezed by the trolley rail m and damaging its thread structure.

[0067] Thanks to the improved technical solution described above, the limiting plug 22e can achieve free expansion and contraction:

[0068] Rotate the planar threaded disc 22e-5 to drive the sliding plug 22e-8 and sliding insert 22e-7 to extend along the fixed spindle 22e-6 and insert into the limiting slide 21c.

[0069] The pressure rail assembly 2 also includes a rigid pressure rail assembly 23, which includes a pressure rail channel 23a formed on the lower end of the pressure plate 22a, a channel side hole 23b formed on the side of the pressure rail channel 23a, a transverse connecting rod 23c formed on the inner wall of the narrow diameter upper opening 21d and passing through the channel side hole 23b, and a rigid pressure shaft 23d formed below the transverse connecting rod 23c and inserted into the pressure rail channel 23a.

[0070] The transverse connecting rod 23c is detachably connected to the narrow-diameter upper opening 21d;

[0071] The transverse connecting rod 23c includes a connecting rod insertion hole 23c-1 located on the inner wall of the narrow-diameter upper opening 21d, a connecting rod transverse hole 23c-2 that transversely penetrates the rigid pressure shaft 23d, a connecting rod end 23c-3 slidably inserted into the connecting rod transverse hole 23c-2, an interlaced insert plate 23c-4 formed on the side of the connecting rod end 23c-3, a driven inclined surface 23c-5 formed on the lower edge of the interlaced insert plate 23c-4, and an externally threaded rod 23c-6 screwed into the middle of the rigid pressure shaft 23d and abutting against the driven inclined surface 23c-5. The connecting rod end 23c-3, the interlaced insert plate 23c-4, and the driven inclined surface 23c-5 are all provided in twos and are axially symmetrically distributed. The interlaced insert plates 23c-4 on the side of the connecting rod end 23c-3 are interlaced with each other.

[0072] As a further implementation scheme, a tension spring 23c-7 is provided between the two connecting rod ends 23c-3 for tensioning, so that the two connecting rod ends 23c-3 can approach each other in their normal state.

[0073] Thanks to the improved technical solution described above, the elastic pressure rail assembly 22 and the rigid pressure rail assembly 23 are easy to disassemble and install.

[0074] First, retract the limiting plug 22e of the elastic pressure rail assembly 22 to release it from locking with the limiting slide 21c;

[0075] Then, rotate the external threaded rod 23c-6 to make it move downwards. The driven inclined surface 23c-5 loses its compressive stress, and the tension spring 23c-7 drives the staggered insert plate 23c-4 and the connecting rod end 23c-3 to move closer to each other and release the lock with the connecting rod insertion hole 23c-1.

[0076] The windproof and anti-sway device also includes a rail clamping assembly 3, of which two are provided. One rail clamping assembly 3 is provided on the left and right sides of the rail pressing assembly 2. The rail clamping assembly 3 is driven by the rail pressing assembly 2 and is used to clamp the trolley rail m.

[0077] Two rail clamping assemblies 3 are provided, and one rail clamping assembly 3 is provided on the left and one on the right of the rail pressing assembly 2. The rail clamping assembly 3 includes:

[0078] The transmission gear 31 is rotatably disposed in the upper transmission cavity 21e and meshes with the corresponding drive rack 22b;

[0079] The transmission rack 32 includes a rack spindle 32a disposed in the upper transmission cavity 21e, a rack body 32b slidably sleeved on the rack spindle 32a, and a release slide 32c formed at the rear end of the rack body 32b.

[0080] The movable clamping arm 33 includes a clamping arm spindle 33a disposed in the clamping rail slide 21g, a clamping arm body 33b slidably sleeved on the clamping arm spindle 33a, a clamping arm stop block 33c formed on the front end of the clamping arm body 33b and stopped by the rack body 32b, and a clamping arm compression spring 33d wound around the clamping arm spindle 33a and abutting against the clamping arm body 33b. The clamping arm stop block 33c can slide laterally across the release slide 32c.

[0081] This case also discloses a method for preventing wind and swaying of a crane, including the following steps:

[0082] Step 1, elastic pressure rail:

[0083] The telescopic component 13 extends, driving the rail pressure assembly 2 downward until the trolley rail m slides into the pressure groove 21b.

[0084] The telescopic component 13 continues to extend, causing the rail retaining ring 22d to press against the trolley rail m;

[0085] As a further implementation plan, the following steps are also included:

[0086] Step 2, Rigid rail clamping:

[0087] The telescopic component 13 continues to extend until the rigid pressure shaft 23d makes hard contact with the trolley rail m;

[0088] Step 3, Lateral rail clamping:

[0089] During step 2, the active rack 22b drives the transmission gear 31 to rotate;

[0090] The transmission gear 31 drives the rack body 32b and the release slide 32c to move downwards until the release slide 32c is aligned with the clamping arm stop 33c. Under the action of the clamping arm compression spring 33d, the clamping arm body 33b and the clamping arm stop 33c move to the left and clamp the side of the trolley rail m.

[0091] Obviously, the elastic rail pressing device 22 and the rigid rail pressing device 23 described in this case can squeeze the top of the trolley rail m, effectively increasing the sliding friction along the rail direction, and can achieve two-stage braking effect according to different wind forces.

[0092] The rail clamping assembly 3 described in this case can clamp the trolley rail m from the side, preventing the crane from swaying under crosswinds.

[0093] It should be noted that there are two limiting slides 21c, and one limiting slide 21c is provided on the left and right sides of the pressing groove 21b.

Claims

1. A wind-resistant and anti-sway crane, comprising a crane body and a wind-resistant and anti-sway device, wherein the crane body travels on a trolley rail (m) via crane outriggers, characterized in that: The windproof and anti-sway device includes: Install the foundation (1) and connect it to the crane outriggers; The rail clamping assembly (2) is slidably mounted on the mounting base (1) and uses the following to clamp the trolley rail (m). Two rail clamping assemblies (3) are provided. One rail clamping assembly (3) is provided on the left and right sides of the rail pressing assembly (2). The rail clamping assembly (3) is driven by the rail pressing assembly (2) and is used to clamp the trolley rail (m). The mounting base (1) includes a mounting housing (11) fixed to the crane outriggers, a longitudinal slide rail (12) formed in the mounting housing (11), and at least two telescopic components (13) provided in the longitudinal slide rail (12). The rail assembly (2) includes a rail base (21) and an elastic rail assembly (22); The rail base (21) includes a rail housing (21a) that can be slidably inserted into a longitudinal slide rail (12), and a front-to-back through-groove pressing groove (21b) formed at the lower end of the rail housing (21a). A limiting slide rail (21c) is provided on the left and right sides of the pressing groove (21b). The rail base (21) also includes a narrow-diameter upper opening (21d) formed at the upper end of the pressing groove (21b), and an upper transmission cavity (21e) formed above the narrow-diameter upper opening (21d). A longitudinal transmission cavity (21f) is provided on the left and right sides below the upper transmission cavity (21e). A rail clamping slide rail (21g) communicating with the pressing groove (21b) is provided below the longitudinal transmission cavity (21f). The elastic pressure rail assembly (22) includes a pressure plate (22a) that passes through the narrow diameter upper opening (21d). The pressure plate (22a) is provided with active racks (22b) on the left and right sides respectively. The elastic pressure rail assembly (22) also includes a pressure spring (22c) wrapped around the pressure plate (22a) and a pressure rail retaining ring (22d) formed at the lower end of the pressure plate (22a). The pressure rail retaining ring (22d) is provided with a limiting plug (22e) on the left and right sides respectively, which is engaged with the limiting slide (21c). The rail clamp assembly (3) includes: The transmission gear (31) is rotatably disposed in the upper transmission cavity (21e) and meshes with the corresponding drive rack (22b); The transmission rack (32) includes a rack spindle (32a) disposed in the upper transmission cavity (21e), a rack body (32b) slidably sleeved on the rack spindle (32a), and a release slide (32c) formed at the rear end of the rack body (32b). The movable clamping arm (33) includes a clamping arm spindle (33a) disposed in the clamping rail slide (21g), a clamping arm body (33b) slidably sleeved on the clamping arm spindle (33a), a clamping arm stop block (33c) formed on the front end of the clamping arm body (33b) and stopped by the rack body (32b), and a clamping arm compression spring (33d) wound around the clamping arm spindle (33a) and abutting against the clamping arm body (33b). The clamping arm stop block (33c) can slide laterally across the release slide (32c).

2. The windproof and anti-sway crane according to claim 1, characterized in that: The pressure rail assembly (2) further includes a rigid pressure rail assembly (23), which includes a pressure rail channel (23a) formed on the lower end of the pressure plate (22a), a channel side hole (23b) formed on the side of the pressure rail channel (23a), a transverse connecting rod (23c) formed on the inner wall of the narrow diameter upper opening (21d) and passing through the channel side hole (23b), and a rigid pressure shaft (23d) formed below the transverse connecting rod (23c) and inserted into the pressure rail channel (23a).

3. A windproof and anti-sway crane according to claim 2, characterized in that: The transverse link (23c) is detachably connected to the narrow-diameter upper opening (21d).

4. A windproof and anti-sway crane according to claim 3, characterized in that: The transverse connecting rod (23c) includes a connecting rod insertion hole (23c-1) provided on the inner wall of the narrow-diameter upper opening (21d), a connecting rod transverse hole (23c-2) that transversely penetrates the rigid pressure shaft (23d), a connecting rod end (23c-3) slidably inserted into the connecting rod transverse hole (23c-2), an interlaced insert plate (23c-4) formed on the side of the connecting rod end (23c-3), and an interlaced insert plate (23c-4) formed on the side of the interlaced insert plate (23c-3). The driven inclined surface (23c-5) at the lower edge of c-4, the external threaded rod (23c-6) screwed into the middle of the rigid pressure shaft (23d) and abutting against the driven inclined surface (23c-5), the connecting rod end (23c-3), the staggered insert plate (23c-4), and the driven inclined surface (23c-5) are all provided with two and are axially symmetrically distributed, and the staggered insert plate (23c-4) on the side of the connecting rod end (23c-3) is staggered with each other.

5. A windproof and anti-sway crane according to claim 4, characterized in that: A tension spring (23c-7) is provided between the ends of the two connecting rods (23c-3) for tensioning.

6. A windproof and anti-sway crane according to any one of claims 3-5, characterized in that: The limiting plug (22e) includes a fixed outer cylinder (22e-1) formed below the pressure rail retaining ring (22d), a locking protrusion (22e-2) formed at the lower end of the inner wall of the fixed outer cylinder (22e-1), a rotating inner cylinder (22e-3) rotatably disposed inside the fixed outer cylinder (22e-1), and an anti-detachment protrusion (22e-4) formed on the upper edge of the outer wall of the rotating inner cylinder (22e-3) and rotatably locked above the locking protrusion (22e-2). The planar threaded disc (22e-5) is formed on the lower edge of the anti-detachment protrusion ring (22e-4). The fixed outer cylinder (22e-1) is provided with a fixed mandrel (22e-6) on the left and right sides respectively. The limiting plug (22e) also includes a sliding insert (22e-7) that is slidably sleeved on the fixed mandrel (22e-6) and a sliding plug (22e-8) formed below the sliding insert (22e-7) and meshing with the planar threaded disc (22e-5).

7. A windproof and anti-sway crane according to claim 6, characterized in that: The telescopic component (13) is a lead screw driven by a motor.

8. A windproof and anti-sway crane according to claim 6, characterized in that: The telescopic component (13) is a hydraulic rod.

Images