A lifting device for a cantilever crane

Abstract

The application relates to the technical field of lifting devices, and particularly discloses a lifting device for a cantilever crane, which achieves the purpose of long-time stable suspension, the fixed base supports the equipment as a whole, the lifting device pushes the suspension rod, thereby driving the winch to ascend, thereby lifting, the lifting device pushes the corresponding components with hydraulic oil, thereby moving the components corresponding to the lifting device, and through the filtration and one-way transmission of the hydraulic oil, the problem of accidental descent during lifting is prevented, and the metal scraps generated when the components move are collected through the filtration of the hydraulic oil by the corresponding components, so that the lifting effect is not affected by the metal scraps and the problem of scratches causing pressure relief is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lifting devices, in particular to a lifting device for a cantilever crane. BACKGROUND

[0002] Traditional cantilever crane lifting devices usually adopt relatively complex mechanical structures, such as multi-stage gear transmission, chain transmission, etc., resulting in a large overall weight of the device, increasing the load of the cantilever crane, reducing its running efficiency and flexibility, and limiting the lifting height and speed: limited by the structure design and power system, the lifting height and speed of the traditional lifting device are often difficult to meet the needs of some specific working conditions, such as in high-rise building construction, large cargo hoisting and other scenes, higher lifting height and faster lifting speed are required, and safety needs to be improved: the traditional lifting device has certain shortcomings in safety performance, such as lack of effective overload protection, limiting device, etc., which is easy to cause accidents, and threatens the operating personnel and the surrounding environment, hydraulic lifting technology: although the hydraulic lifting technology improves the performance of the lifting device to a certain extent, the hydraulic system has problems such as leakage, high maintenance cost, harsh requirements on working environment, etc., which limits its application in some occasions, the electric lifting device has the advantages of convenient operation, high control precision, etc., but the lifting capacity, anti-interference ability, etc. still need to be further improved to adapt to more complex working conditions.

[0003] The system efficiency is relatively low (there is throttling loss), the oil cleanliness and sealing performance are high, the maintenance is relatively complex, and the hydraulic system or brake is not sealed, which causes the heavy object to slowly slide in the air. SUMMARY

[0004] In order to achieve the above purpose, the present application is realized by the following technical scheme: a lifting device for a cantilever crane, comprising a fixed base, the top of the fixed base is fixedly connected with a lifting device, the top of the lifting device is fixedly connected with a suspension rod, and the bottom of the suspension rod is fixedly connected with a winch;

[0005] The lifting device comprises a hydraulic telescopic rod, the fixed end side of the hydraulic telescopic rod is communicated with a flow guide device, one end of the flow guide device away from the hydraulic telescopic rod is fixedly connected with a filter device, the side of the filter device is fixedly connected with a pushing device, the fixed end of the hydraulic telescopic rod is connected with the side of the pushing device through a pipeline, the fixed end of the hydraulic telescopic rod is fixedly connected with the top of a fixed base, the movable end of the hydraulic telescopic rod is fixedly connected with the bottom of a suspension rod, the pushing device pushes the hydraulic oil to be filtered along the filter device, the hydraulic oil is filtered into the inside of the flow guide device and the fixed end of the hydraulic telescopic rod, so as to drive the hydraulic telescopic rod to move, so as to drive the movable end of the hydraulic telescopic rod to rise, and automatic stopping is realized through the one-way transmission of the flow guide device, without additional driving intervention relative to the traditional driving mode, so as to be favorable for long-time suspension operation.

[0006] Preferably, the flow guide device comprises an oil inlet pipe, the side of the oil inlet pipe is communicated with a fixed pipe, the side of the fixed pipe is communicated with a flow guide pipe, the inner wall of the filter device is slidably connected with a sliding assembly, the side of the sliding assembly is sleeved and slidably connected with a limiting assembly, the side of the limiting assembly is fixedly connected with a spring, the side of the sliding assembly is sleeved and slidably connected with a sliding sleeve, the sliding sleeve is fixedly connected with the inner wall of the oil inlet pipe through a support, the side of the flow guide pipe is communicated with the fixed end of the hydraulic telescopic rod, the side of the limiting assembly is fixedly connected with the inner wall of the fixed pipe, the hydraulic oil is introduced along the oil inlet pipe, flows along the side of the sliding sleeve into the side of the limiting assembly, and reaches the side of the flow guide pipe through the fixed pipe, flows along the inclined inner wall of the flow guide pipe, so as to push the blocking plate to move, so as to drive the fixed rod to slide along the inner wall of the limiting assembly, the hydraulic oil is released through the pressure relief hole, so as to drive the hydraulic telescopic rod to move, and when the hydraulic telescopic rod bears a load, the pressure of the hydraulic oil directly acts on the side of the blocking plate, and the blocking plate is supported through the fixed support, so as to drive the blocking plate to slide along the inner wall of the flow guide pipe, so as to be sealed, and the spring drives the blocking plate to slide, so as to avoid pressure relief, and the positioning groove ensures sealing with the flow guide pipe.

[0007] Preferably, the sliding assembly comprises a blocking plate, the side of the blocking plate is fixedly connected with a fixed support, the side away from the fixed support of the blocking plate is provided with a positioning groove, the side of the positioning groove is provided with a pressure relief hole, the side center position of the blocking plate is fixedly connected with a fixed rod, one end away from the blocking plate of the fixed rod is fixedly connected with a spring seat, the side of the spring seat is fixedly connected with the side of the spring, and the inner wall of the flow guide pipe is provided with a sliding groove matched with the positioning groove.

[0008] Preferably, the limiting assembly includes a sliding base, the side of the sliding base is fixedly connected with a connecting support, the side of the sliding base is provided with a sliding hole in the center, the side of the sliding base is fixedly connected with a spring base, the sliding base is sleeved on the side of the fixed rod through the sliding hole and is in sliding connection with the side of the fixed rod, one end of the spring away from the spring base is fixedly connected with the side of the spring base, and the other end of the connecting support away from the sliding base is fixedly connected with the inner wall of the fixed tube. The sliding base is used for limiting the sliding track of the fixed rod, the hydraulic oil is transported through the gap between the connecting supports, and the spring base is arranged to provide support for the side of the spring, so that the fixed rod slides along the fixed track while the flow of hydraulic oil is maintained.

[0009] Preferably, the filtering device includes a fixed frame, the inner wall of the fixed frame is fixedly connected with a sliding strip, the side of the sliding strip is slidingly connected with a sliding frame, the top of the sliding frame is rotatably connected with a stud, the inner wall of the sliding frame is fixedly connected with a filtering assembly, the side of the fixed frame is fixedly connected with the side of an oil inlet pipe, and the side of the sliding frame is in communication with the side of the oil inlet pipe. In industrial production and many fields related to liquid transportation and treatment, the performance of the filtering device is crucial. Preferably, the filtering device discussed herein has a delicate and practical design. The filtering device mainly includes a fixed frame, which is the basic support structure of the entire filtering device. The fixed frame is carefully crafted and has sufficient strength and stability to withstand various pressures and forces generated during the filtering process. The inner wall of the fixed frame is fixedly connected with a sliding strip, which serves as a track to provide a precise path for the sliding of subsequent components. The side of the sliding strip is slidingly connected with a sliding frame, which can slide along the sliding strip flexibly. This design makes the filtering device very convenient to install, disassemble, and maintain. The top of the sliding frame is rotatably connected with a stud, which can be rotated to fine-tune the position of the sliding frame to ensure optimal cooperation with other components. The inner wall of the sliding frame is fixedly connected with a filtering assembly, which is the core part of the filtering device. The filtering assembly can effectively intercept harmful substances such as impurities and particles in the liquid to ensure the purity of the output liquid. It uses special filtering materials and processes, has high efficiency, and is durable. The side of the fixed frame is fixedly connected with the side of an oil inlet pipe, which is responsible for introducing the liquid to be filtered into the filtering device. The side of the sliding frame is in communication with the side of the oil inlet pipe, so that the liquid to be filtered can smoothly enter the filtering assembly for filtering treatment. The design of the entire filtering device organically combines various components, ensuring filtering effectiveness while improving convenience and reliability. Whether in petrochemical industry, food processing, or other fields, this filtering device can play an important role and provide strong support for the production process.

[0010] Preferably, the filter assembly comprises a connecting cylinder, the side of the connecting cylinder is fixedly connected with a filter ring, the side of the filter ring is communicated with a liquid inlet pipe, the inner wall of the connecting cylinder is fixedly connected with a filter plate at the middle position, the side of the filter plate is fixedly connected with an arc-shaped pointed top, and the side of the connecting cylinder is fixedly connected with the inner wall of the sliding frame.

[0011] Preferably, the sliding assembly comprises an oil storage tank, the inner wall of the oil storage tank is slidingly connected with a conical oil plug, the side of the conical oil plug is fixedly connected with a screw rod, the side of the screw rod is sleeved and threadedly connected with a drive gear, the top of the drive gear is engaged with an electric worm, the side of the electric worm is fixedly connected with the side of the oil storage tank, the side of the oil storage tank is fixedly connected with the side of the fixed frame, hydraulic oil flows along the side of the connecting cylinder, is filtered through the filter ring, flows along the liquid inlet pipe, contacts the side of the arc-shaped pointed top, drives the fragments to flow, and makes the fragments enter the side under the guidance of the arc-shaped pointed top. The hydraulic oil is filtered through the filter plate, the metal chips enter the side along the surface of the arc-shaped pointed top, the metal chips are collected, the metal chips are collected between the liquid inlet pipe and the inner wall of the connecting cylinder, the metal chips are concentrated, the connecting cylinder is manually rotated when maintained, the sliding frame is moved up and down by the screw rod, the sliding frame is driven to move, the connecting cylinder is replaced through the connecting cylinder fixedly connected with the side of the sliding frame, the connecting cylinder collected is removed from the oil delivery pipeline, quick maintenance and replacement are realized, the position of the sliding frame is stabilized through the screw rod, the oil passage is kept unobstructed, the electric worm is started, the electric worm rotates to drive the drive gear, the drive gear rotates to drive the screw rod to move, the screw rod moves to drive the conical oil plug to move, the hydraulic oil in the oil storage tank is pushed to flow, the hydraulic telescopic rod is driven, the position of the conical oil plug is fixed through the one-way guidance of the electric worm and the drive gear, and the position of the screw rod is further fixed through the threaded connection of the screw rod and the drive gear, so that long-time stable suspension work is facilitated.

[0012] The application provides a lifting device for a cantilever crane.

[0013] 1. The lifting device for the cantilever crane is provided with a pushing device, the pushing device pushes hydraulic oil to filter along the filter device, the hydraulic oil enters the inside of the flow guide device and the inside of the fixed end of the hydraulic telescopic rod after being filtered, so as to drive the hydraulic telescopic rod to move, drive the moving end of the hydraulic telescopic rod to rise, and realize automatic stop through the one-way transmission of the flow guide device. Compared with the traditional driving mode, no additional driving intervention is needed, so that long-time suspension work is facilitated.

[0014] 2. The lifting device for the cantilever crane, the oil inlet pipe is arranged, the hydraulic oil is guided along the oil inlet pipe, flows along the side of the sliding sleeve, enters the side of the limiting assembly, and reaches the side of the flow guide pipe through the fixed pipe, flows along the inclined inner wall of the flow guide pipe, so as to drive the blocking plate to move, so as to drive the fixed rod to slide along the inner wall of the limiting assembly, the hydraulic oil is released through the pressure relief hole, so as to drive the hydraulic telescopic rod to move, and when the hydraulic telescopic rod bears the load, the pressure of the hydraulic oil directly acts on the side of the blocking plate, and the blocking plate is supported through the fixed frame, so as to drive the blocking plate to slide along the inner wall of the flow guide pipe, so as to seal, and the spring is arranged to drive the blocking plate to slide, so as to avoid pressure relief, and the positioning groove is arranged to ensure the sealing with the flow guide pipe.

[0015] 3. The lifting device for the cantilever crane, the sliding base is arranged to limit the sliding track of the fixed rod, the gap between the connecting supports is arranged to convey the hydraulic oil, and the spring base is arranged to provide support for the side of the spring, so as to ensure that the fixed rod slides along the fixed track while the hydraulic oil flows.

[0016] 4. The lifting device for the cantilever crane, the hydraulic oil flows along the side of the connecting cylinder, the hydraulic oil is filtered through the filter ring, and flows along the liquid inlet pipe, so as to contact the side of the arc-shaped pointed top, so as to drive the fragments to flow, so that the fragments enter the side under the guidance of the arc-shaped pointed top. And the hydraulic oil is filtered through the filter plate, the metal fragments enter the side along the surface of the arc-shaped pointed top, so as to collect the metal fragments, so that the metal fragments are collected between the inner wall of the liquid inlet pipe and the connecting cylinder, so as to concentrate the metal fragments, when maintaining, manually rotating the stud, the stud drives the sliding frame to move up and down, so as to drive the sliding frame to move, the connecting cylinder fixedly connected through the side of the sliding frame is replaced, so that the completed connecting cylinder is removed from the oil delivery pipeline, so as to quickly maintain and replace, and the position of the sliding frame is stabilized through the arrangement of the stud, so as to facilitate the smooth oil passage, the electric worm is started, the electric worm rotates to drive the drive gear, the drive gear rotates to drive the screw to move, the screw moves to drive the conical oil plug to move, so as to drive the hydraulic oil in the oil tank to flow, so as to drive the hydraulic telescopic rod, and the position of the conical oil plug is fixed through the one-way guiding action of the electric worm and the drive gear, and the position of the screw is further fixed through the threaded connection of the screw and the drive gear, so as to facilitate long and stable suspension work. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 The structure diagram of the lifting device for the cantilever crane of the present application;

[0018] Figure 2Structure diagram of lifting device of the application;

[0019] Figure 3 Structure diagram of flow guide device of the application;

[0020] Figure 4 Structure diagram of sliding assembly of the application;

[0021] Figure 5 Structure diagram of limiting assembly of the application;

[0022] Figure 6 Structure diagram of filtering device of the application;

[0023] Figure 7 Structure diagram of filtering assembly of the application;

[0024] Figure 8 Structure diagram of pushing device of the application.

[0025] In the figure: 1, fixed base; 2, lifting device; 3, suspension rod; 4, winch; 201, hydraulic telescopic rod; 202, flow guide device; 203, filtering device; 204, pushing device; 2021, oil inlet pipe; 2022, fixed pipe; 2023, flow guide pipe; 2024, sliding assembly; 2025, limiting assembly; 2026, spring; 2027, sliding sleeve; 20241, blocking plate; 20242, fixed frame; 20243, positioning groove; 20244, pressure relief hole; 20245, fixed rod; 20246, spring seat; 20251, sliding base; 20252, connecting support; 20253, sliding hole; 20254, spring base; 2031, fixed frame; 2032, sliding bar; 2033, sliding frame; 2034, stud; 2035, filtering assembly; 20351, connecting cylinder; 20352, filtering ring; 20353, liquid inlet pipe; 20354, filter plate; 20355, arc-shaped pointed top; 2041, oil storage tank; 2042, conical oil plug; 2043, screw rod; 2044, driving gear; 2045, electric worm. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the application.

[0027] Please refer to Figures 1-2The application provides a technical scheme: a lifting device for a cantilever crane, which comprises a fixed base 1, a lifting device 2 fixedly connected to the top of the fixed base 1, a suspension rod 3 fixedly connected to the top of the lifting device 2, and a winch 4 fixedly connected to the bottom of the suspension rod 3.

[0028] The fixed base 1 supports the equipment as a whole, the lifting device 2 drives the suspension rod 3 to move, thereby driving the winch 4 to rise, so that the components used by the lifting device 2 are pushed by hydraulic oil, thereby realizing the movement of the components corresponding to the lifting device 2, and preventing accidental descent during the lifting process through the filtration and one-way transmission of the hydraulic oil, and collecting the metal debris generated when the components move through the filtration of the hydraulic oil by the corresponding components, thereby avoiding the influence of the metal debris on the lifting effect and the problem of scratches causing pressure relief during the movement.

[0029] The lifting device 2 comprises a hydraulic telescopic rod 201, the fixed end side of the hydraulic telescopic rod 201 is communicated with a flow guide device 202, the end of the flow guide device 202 away from the hydraulic telescopic rod 201 is fixedly connected with a filter device 203, the side of the filter device 203 is fixedly connected with a pushing device 204, the fixed end of the hydraulic telescopic rod 201 is connected with the side of the pushing device 204 through a pipeline, the fixed end of the hydraulic telescopic rod 201 is fixedly connected with the top of the fixed base 1, and the movable end of the hydraulic telescopic rod 201 is fixedly connected with the bottom of the suspension rod 3.

[0030] The pushing device 204 pushes the hydraulic oil to pass through the filter device 203 for filtration, the hydraulic oil enters the inside of the flow guide device 202 and the fixed end of the hydraulic telescopic rod 201 after filtration, thereby driving the hydraulic telescopic rod 201 to move, driving the movable end of the hydraulic telescopic rod 201 to rise, and realizing automatic stop through the one-way transmission of the flow guide device 202, without additional driving intervention relative to the traditional driving mode, thereby being beneficial to long-time suspension operation.

[0031] Please refer to Figures 1-4 The application provides a technical scheme: the flow guide device 202 comprises an oil inlet pipe 2021, the side of the oil inlet pipe 2021 is communicated with a fixed pipe 2022, the side of the fixed pipe 2022 is communicated with a flow guide pipe 2023, a sliding assembly 2024 is slidably connected to the inner wall of the filter device 203, the side of the sliding assembly 2024 is sleeved and slidably connected with a limiting assembly 2025, the side of the limiting assembly 2025 is fixedly connected with a spring 2026, the side of the sliding assembly 2024 is sleeved and slidably connected with a sliding sleeve 2027, the sliding sleeve 2027 is fixedly connected with the inner wall of the oil inlet pipe 2021 through a support, the side of the flow guide pipe 2023 is communicated with the fixed end of the hydraulic telescopic rod 201, and the side of the limiting assembly 2025 is fixedly connected with the inner wall of the fixed pipe 2022.

[0032] The sliding assembly 2024 comprises a blocking plate 20241, the side surface of the blocking plate 20241 is fixedly connected with a fixing frame 20242, the side surface of the blocking plate 20241 away from the fixing frame 20242 is provided with a positioning groove 20243, the side surface of the positioning groove 20243 is provided with a pressure relief hole 20244, the side surface of the blocking plate 20241 is fixedly connected with a fixed rod 20245, one end of the fixed rod 20245 away from the blocking plate 20241 is fixedly connected with a spring seat 20246, the side surface of the spring seat 20246 is fixedly connected with the side surface of the spring 2026, and the inner wall of the flow guide pipe 2023 is provided with a sliding groove matched with the positioning groove 20243.

[0033] The hydraulic oil is introduced along the oil inlet pipe 2021, flows along the side surface of the sliding sleeve 2027, enters the side surface of the limiting assembly 2025, passes through the fixed pipe 2022 and reaches the side surface of the flow guide pipe 2023, flows along the inclined inner wall of the flow guide pipe 2023, thereby driving the blocking plate 20241 to move, driving the fixed rod 20245 to slide along the inner wall of the limiting assembly 2025, and the hydraulic oil is released through the pressure relief hole 20244, thereby driving the hydraulic telescopic rod 201 to move, and when the hydraulic telescopic rod 201 bears a load, the pressure of the hydraulic oil directly acts on the side surface of the blocking plate 20241 and supports the blocking plate 20241 through the fixing frame 20242, thereby driving the blocking plate 20241 to slide along the inner wall of the flow guide pipe 2023, thereby sealing, and the spring 2026 drives the blocking plate 20241 to slide, thereby avoiding pressure relief, and the positioning groove 20243 is arranged to ensure sealing with the flow guide pipe 2023.

[0034] Please refer to Figures 1-5 The present application provides a technical solution: the limiting assembly 2025 comprises a sliding base 20251, the side surface of the sliding base 20251 is fixedly connected with a connecting support 20252, the side surface of the sliding base 20251 is provided with a sliding hole 20253 at the center position, the side surface of the sliding base 20251 is fixedly connected with a spring base 20254, the sliding base 20251 is sleeved on the side surface of the fixed rod 20245 and is in sliding connection with the side surface of the fixed rod 20245 through the sliding hole 20253, one end of the spring 2026 away from the spring seat 20246 is fixedly connected with the side surface of the spring base 20254, and one end of the connecting support 20252 away from the sliding base 20251 is fixedly connected with the inner wall of the fixed pipe 2022.

[0035] The sliding base 20251 is used to limit the sliding track of the fixed rod 20245, the gap between the connecting supports 20252 is used to transport hydraulic oil, and the spring base 20254 is arranged on the side of the spring 2026 to provide support, so as to ensure that the fixed rod 20245 slides along the fixed track while keeping the hydraulic oil flowing.

[0036] Please refer to Figures 1-8 The application provides a technical solution: the filter device 203 comprises a fixed frame 2031, the inner wall of the fixed frame 2031 is fixedly connected with a sliding strip 2032, the side surface of the sliding strip 2032 is slidably connected with a sliding frame 2033, the top of the sliding frame 2033 is rotatably connected with a stud 2034, the inner wall of the sliding frame 2033 is fixedly connected with a filter assembly 2035, the side surface of the fixed frame 2031 is fixedly connected with the side surface of the oil inlet pipe 2021, and the side surface of the sliding frame 2033 is in communication with the side surface of the oil inlet pipe 2021.

[0037] The filter assembly 2035 comprises a connecting barrel 20351, the side surface of the connecting barrel 20351 is fixedly connected with a filter ring 20352, the side surface of the filter ring 20352 is in communication with a liquid inlet pipe 20353, the inner wall of the connecting barrel 20351 is fixedly connected with a filter plate 20354 at the middle position, the side surface of the filter plate 20354 is fixedly connected with an arc-shaped pointed top 20355, and the side surface of the connecting barrel 20351 is fixedly connected with the inner wall of the sliding frame 2033.

[0038] The sliding assembly 2024 comprises an oil storage tank 2041, the inner wall of the oil storage tank 2041 is slidably connected with a conical oil plug 2042, the side surface of the conical oil plug 2042 is fixedly connected with a screw rod 2043, the side surface of the screw rod 2043 is sleeved and threadedly connected with a driving gear 2044, the top of the driving gear 2044 is engaged with an electric worm 2045, the side surface of the electric worm 2045 is fixedly connected with the side surface of the oil storage tank 2041, and the side surface of the oil storage tank 2041 is fixedly connected with the side surface of the fixed frame 2031.

[0039] The hydraulic oil flows along the side of the connecting cylinder 20351, is filtered by the filter ring 20352, and flows along the liquid inlet pipe 20353 to contact the side of the arc-shaped pointed top 20355 to drive the debris to flow into the side of 30353 under the guidance of the arc-shaped pointed top 20355. The hydraulic oil is filtered by the filter plate 20354, and the metal debris enters the side of 30353 along the surface of the arc-shaped pointed top 20355 to collect the metal debris, so that the metal debris is collected between the liquid inlet pipe 20353 and the inner wall of the connecting cylinder 20351 to concentrate the metal debris. When maintaining, manually rotate the stud 2034, which drives the sliding frame 2033 to move up and down to drive the sliding frame 2033 to move, and the connecting cylinder 20351 fixedly connected to the side of the sliding frame 2033 is replaced, so that the collected connecting cylinder 20351 is removed from the oil delivery pipeline to quickly maintain and replace, and the position of the sliding frame 2033 is stabilized by the stud 2034 to facilitate the oil passage to be kept unobstructed. Start the electric worm 2045, which rotates to drive the drive gear 2044, which rotates to drive the screw rod 2043 to move, which drives the conical oil plug 2042 to move to push the hydraulic oil inside the oil tank 2041 to flow to drive the hydraulic telescopic rod 201, and the position of the conical oil plug 2042 is fixed by the one-way guidance of the electric worm 2045 and the drive gear 2044, and the position of the screw rod 2043 is further fixed by the threaded connection of the screw rod 2043 and the drive gear 2044, so as to facilitate long-time stable suspension work.

[0040] Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art and related fields without creative labor should belong to the scope of protection of the present application. The structures, devices and operation methods not specifically described and explained in the present application, if not specially described and limited, are implemented according to the conventional means in the art.

Claims

1. A hoisting device for a cantilever crane, characterized in that: Including fixed base (1), the top of the fixed base (1) is fixedly connected with lifting device (2), the top of the lifting device (2) is fixedly connected with suspension rod (3), the bottom of the suspension rod (3) is fixedly connected with winch (4); The lifting device (2) includes hydraulic telescopic rod (201), the fixed end side of the hydraulic telescopic rod (201) is communicated with flow guide device (202), one end of the flow guide device (202) away from the hydraulic telescopic rod (201) is fixedly connected with filter device (203), the side of the filter device (203) is fixedly connected with push device (204), the fixed end of the hydraulic telescopic rod (201) is connected with the side of push device (204) through pipeline, the fixed end of the hydraulic telescopic rod (201) is fixedly connected with the top of the fixed base (1), and the movable end of the hydraulic telescopic rod (201) is fixedly connected with the bottom of the suspension rod (3); The flow guide device (202) includes oil inlet pipe (2021), the side of the oil inlet pipe (2021) is communicated with fixed pipe (2022), the side of the fixed pipe (2022) is communicated with flow guide pipe (2023), the inner wall of the filter device (203) is slidably connected with sliding assembly (2024), the side of the sliding assembly (2024) is sleeved and slidably connected with limiting assembly (2025), the side of the limiting assembly (2025) is fixedly connected with spring (2026), the side of the sliding assembly (2024) is sleeved and slidably connected with sliding sleeve (2027), the sliding sleeve (2027) is fixedly connected with the inner wall of the oil inlet pipe (2021) through the support, the side of the flow guide pipe (2023) is communicated with the fixed end of the hydraulic telescopic rod (201), and the side of the limiting assembly (2025) is fixedly connected with the inner wall of the fixed pipe (2022); The sliding assembly (2024) includes blocking plate (20241), the side of the blocking plate (20241) is fixedly connected with fixed frame (20242), the side away from the fixed frame (20242) of the blocking plate (20241) is provided with positioning groove (20243), the side of the positioning groove (20243) is provided with pressure relief hole (20244), the side center of the blocking plate (20241) is fixedly connected with fixed rod (20245), one end of the fixed rod (20245) away from the blocking plate (20241) is fixedly connected with spring seat (20246), the side of the spring seat (20246) is fixedly connected with the side of spring (2026), and the inner wall of the flow guide pipe (2023) is provided with sliding groove matched with the positioning groove (20243). The limiting component (2025) includes a sliding base (20251), the side of the sliding base (20251) is fixedly connected with a connecting support (20252), the side of the sliding base (20251) is provided with a sliding hole (20253) at the center position, and the side of the sliding base (20251) is fixedly connected with a spring base (20254). The sliding base (20251) is sleeved on the side of the fixed rod (20245) through the sliding hole (20253) and is in sliding connection with the side of the fixed rod (20245).

2. A hoisting device for a cantilever crane according to claim 1, characterized in that One end of the spring (2026) away from the spring base (20246) is fixedly connected with the side of the spring base (20254), and the other end of the connecting support (20252) away from the sliding base (20251) is fixedly connected with the inner wall of the fixed tube (2022).

3. A hoisting device for a cantilever crane according to claim 1, characterized in that: The filtering device (203) includes a fixed frame (2031), the inner wall of the fixed frame (2031) is fixedly connected with a sliding strip (2032), the side of the sliding strip (2032) is slidably connected with a sliding frame (2033), the top of the sliding frame (2033) is rotatably connected with a threaded stud (2034), and the inner wall of the sliding frame (2033) is fixedly connected with a filtering assembly (2035).

4. A hoisting device for a cantilever crane according to claim 3, characterized in that: The side of the fixed frame (2031) is fixedly connected with the side of the oil inlet pipe (2021), and the side of the sliding frame (2033) is in communication with the side of the oil inlet pipe (2021).

5. A hoisting device for a cantilever crane according to claim 3, characterized in that: The filtering assembly (2035) includes a connecting cylinder (20351), the side of the connecting cylinder (20351) is fixedly connected with a filtering ring (20352), the side of the filtering ring (20352) is in communication with a liquid inlet pipe (20353), the inner wall of the connecting cylinder (20351) is fixedly connected with a filtering plate (20354) at the middle position, the side of the filtering plate (20354) is fixedly connected with an arc-shaped pointed top (20355), and the side of the connecting cylinder (20351) is fixedly connected with the inner wall of the sliding frame (2033).

6. A hoisting device for a cantilever crane according to claim 1, characterized in that: The pushing device (204) includes an oil storage tank (2041), the inner wall of the oil storage tank (2041) is slidably connected with a tapered oil plug (2042), the side of the tapered oil plug (2042) is fixedly connected with a screw rod (2043), the side of the screw rod (2043) is sleeved and threadedly connected with a drive gear (2044), the top of the drive gear (2044) is engaged with an electric worm (2045), the side of the electric worm (2045) is fixedly connected with the side of the oil storage tank (2041), and the side of the oil storage tank (2041) is fixedly connected with the side of the fixed frame (2031).

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