Lifting device for cantilever crane

Abstract

The invention relates to the technical field of lifting devices, and particularly discloses a lifting device for a cantilever crane, the lifting device for the cantilever crane achieves the purpose of long-time stable suspension, a fixed base integrally supports equipment, and the lifting device pushes a suspension rod so as to drive a winch to ascend, so that the hoisting efficiency is improved, and the hoisting efficiency is improved. Hydraulic oil is pushed to the used assembly through the lifting device, so that the assembly corresponding to the lifting device is driven to move, the problem of accidental descending in the lifting process is prevented through filtering and one-way transmission of the hydraulic oil, the hydraulic oil is filtered through the corresponding assembly, and the lifting efficiency is improved. And therefore, metal scraps generated when the assembly moves are collected, and the problems that the metal scraps influence the lifting effect in the moving process, and pressure relief is caused by scratches are solved.

Description

Technical Field

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

[0002] Traditional jib crane lifting devices usually adopt more complex mechanical structures, such as multi-stage gear transmission and chain transmission, which leads to a larger overall weight of the device, increases the load of the jib crane, and reduces its operating efficiency and flexibility. The lifting height and speed are limited: Due to the limitations of structural design and power system, the lifting height and speed of traditional lifting devices are often difficult to meet the requirements of some specific working conditions. For example, in scenarios such as high-rise building construction and large cargo lifting, higher lifting heights and faster lifting speeds are required. Safety needs to be improved: Traditional lifting devices have certain shortcomings in safety performance, such as the lack of effective overload protection and limit devices, which can easily lead to accidents and pose a threat to operators and the surrounding environment. Hydraulic lifting technology: Although hydraulic lifting technology has improved the performance of lifting devices to a certain extent, the hydraulic system has problems such as leakage, high maintenance costs, and demanding working environment requirements, which limit its application in some occasions. Electric lifting devices have the advantages of easy operation and high control precision, but their lifting capacity and anti-interference ability need to be further improved to adapt to more complex working conditions.

[0003] The system efficiency is relatively low (there is throttling loss), has high requirements for oil cleanliness and sealing, and is relatively complex to maintain. Poor sealing of the hydraulic system or brakes can cause heavy objects to slowly slide down in the air. Summary of the Invention

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: A lifting device for a cantilever crane, comprising a fixed base, a lifting device fixedly connected to the top of the fixed base, a suspension rod fixedly connected to the top of the lifting device, and a winch fixedly connected to the bottom of the suspension rod; The lifting device includes a hydraulic telescopic rod, and the side surface of the fixed end of the hydraulic telescopic rod is connected to a guide device, and the end of the guide device away from the hydraulic telescopic rod is fixedly connected to a filtering device, and the side surface of the filtering device is fixedly connected to a pushing device. The fixed end of the hydraulic telescopic rod is connected to the side surface of the pushing device through a pipeline, the fixed end of the hydraulic telescopic rod is fixedly connected to the top of the fixed base, and the movable end of the hydraulic telescopic rod is fixedly connected to the bottom of the suspension rod. The pushing device pushes the hydraulic oil to be filtered along the filtering device, and the hydraulic oil enters the interior of the guide device and the interior of the fixed end of the hydraulic telescopic rod after being filtered, thereby driving the hydraulic telescopic rod to move, thereby driving the movable end of the hydraulic telescopic rod to rise, and automatically stopping is achieved through the one-way transmission of the guide device. Compared with the traditional driving method, no additional driving intervention is required, which is conducive to long-term suspension operations.

[0005] Preferably, the flow guiding device includes an oil inlet pipe, the side of the oil inlet pipe is connected to a fixed pipe, the side of the fixed pipe is connected to a flow guiding pipe, the inner wall of the filtering device is slidably connected to a sliding component, the side of the sliding component is sleeved and slidably connected to a limiting component, the side of the limiting component is fixedly connected to a spring, the side of the sliding component is sleeved and slidably connected to a sliding sleeve, the sliding sleeve is fixedly connected to the inner wall of the oil inlet pipe through a bracket, the side of the flow guiding pipe is connected to the fixed end of the hydraulic telescopic rod, the side of the limiting component is fixedly connected to the inner wall of the fixed pipe, the hydraulic oil is introduced along the oil inlet pipe, and flows into the filter along the side of the sliding sleeve To the side of the limit assembly, and through the fixed pipe to reach the side of the guide pipe, flow along the inclined inner wall of the guide pipe, thereby pushing the baffle to move, thereby driving the fixed rod to slide along the inner wall of the limit assembly, and the hydraulic oil is released through the pressure relief hole, thereby driving 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 baffle, and supports the baffle through the fixed frame, thereby driving the baffle to slide along the inner wall of the guide pipe, thereby sealing, and the elastic force of the spring drives the baffle to slide, thereby avoiding pressure relief, and the setting of the positioning groove ensures the seal with the guide pipe.

[0006] Preferably, the sliding assembly includes a blocking plate, a side of the blocking plate is fixedly connected to a fixing frame, a side of the blocking plate away from the fixing frame is provided with a positioning groove, a side of the positioning groove is provided with a pressure relief hole, a fixing rod is fixedly connected to the center position of the side of the blocking plate, an end of the fixing rod away from the blocking plate is fixedly connected to a spring seat, the side of the spring seat is fixedly connected to the side of the spring, and the inner wall of the guide tube is provided with a sliding groove adapted to the positioning groove.

[0007] Preferably, the limit assembly includes a sliding base, the side of the sliding base is fixedly connected to a connecting bracket, the center position of the side of the sliding base is provided with a sliding hole, the side of the sliding base is fixedly connected to a spring base, the sliding base is sleeved on the side of the fixed rod through the sliding hole and is slidably connected to the side of the fixed rod, one end of the spring away from the spring seat is fixedly connected to the side of the spring base, and one end of the connecting bracket away from the sliding base is fixedly connected to the inner wall of the fixed tube, the sliding base is used to limit the sliding trajectory of the fixed rod, and hydraulic oil is transported through the gap between the connecting brackets. At the same time, the setting of the spring base provides support for the side of the spring, thereby ensuring that the fixed rod slides along the fixed trajectory while maintaining the circulation of hydraulic oil.

[0008] The filter device of claim 1, wherein the filter device comprises a fixed frame, the inner wall of the fixed frame is fixedly connected with a slide bar, the side of the slide bar is slidably connected to the sliding frame, the top of the sliding frame is rotatably connected to a stud, the inner wall of the sliding frame is fixedly connected with a filter assembly, the side of the fixed frame is fixedly connected to the side of the oil inlet pipe, and the side of the sliding frame is communicated with the side of the oil inlet pipe. In industrial production and many fields involving liquid transportation and processing, the performance of the filter device is of great importance. Preferably, the filter device we are discussing has a sophisticated and practical design. The filter device mainly comprises a fixed frame, which is the basic supporting structure of the entire filter device. The fixed frame is carefully crafted and has sufficient strength and stability to withstand various pressures and forces generated during the filtration process. The inner wall of the filter device is fixedly connected with a slide bar, which is like a track, providing a precise path for the sliding of subsequent components. The side of the slide bar is slidably connected to the sliding frame, and the sliding frame can slide flexibly along the slide bar. This design makes the filter device Installation, disassembly and maintenance are very convenient. The top of the sliding frame is connected to a stud for rotation. By turning the stud, the position of the sliding frame can be fine-tuned to ensure its optimal coordination with other components. The inner wall of the sliding frame is fixedly connected to a filter assembly, which is the core part of the filtering device. The filter assembly can effectively intercept impurities, particles and other harmful substances in the liquid to ensure the purity of the output liquid. It uses special filtering materials and processes, and is characterized by high efficiency and durability. The side of the fixed frame is fixedly connected to the side of the oil inlet pipe. The oil inlet pipe is responsible for introducing the liquid to be filtered into the filtering device, and the side of the sliding frame is connected to the side of the oil inlet pipe, so that the liquid to be filtered can smoothly enter the filter assembly for filtration processing. The design of the entire filtering device organically combines various components, which not only ensures the filtering effect, but also improves the convenience and reliability of use. Whether in petrochemical, food processing or other fields, this filtering device can play an important role and provide strong protection for the production process.

[0009] Preferably, the filter assembly includes a connecting tube, a filter ring is fixedly connected to the side of the connecting tube, the side of the filter ring is connected to the liquid inlet pipe, a filter plate is fixedly connected to the middle position of the inner wall of the connecting tube, an arc-shaped spire is fixedly connected to the side of the filter plate, and the side of the connecting tube is fixedly connected to the inner wall of the sliding frame.

[0010] Preferably, the sliding assembly includes an oil storage tank, the inner wall of the oil storage tank is slidingly connected to a conical oil plug, the side of the conical oil plug is fixedly connected to a screw, the side of the screw is sleeved and threadedly connected to a driving gear, the top of the driving gear is engaged with an electric worm, the side of the electric worm is fixedly connected to the side of the oil storage tank, the side of the oil storage tank is fixedly connected to the side of the fixed frame, the hydraulic oil flows along the side of the connecting cylinder, the hydraulic oil is filtered by the filter ring, and flows along the liquid inlet pipe, thereby contacting the side of the arc-shaped spire, thereby driving debris to flow, so that the debris enters the side under the guidance of the arc-shaped spire. The hydraulic oil is filtered through the filter plate, and metal debris enters the side along the surface of the arc-shaped spire, thereby collecting the metal debris, so that the metal debris is collected between the liquid inlet pipe and the inner wall of the connecting cylinder, thereby concentrating the metal debris. When maintenance is required, the stud is manually rotated, and the stud drives the sliding frame to move up and down, thereby driving the sliding frame to move, and the connecting cylinder fixedly connected to the side of the sliding frame is replaced, so that the collected connecting cylinder is removed from the oil delivery pipeline, thereby enabling quick maintenance and replacement, and the position of the sliding frame is stabilized by the setting of the stud, thereby facilitating the unobstructed oil path, starting the electric worm, and the electric worm rotates to drive the drive gear, and the drive gear rotates to drive the screw to move, and the screw movement drives the conical oil plug to move, thereby promoting the flow of hydraulic oil inside the oil storage tank, thereby driving the hydraulic telescopic rod, and the position of the conical oil plug is fixed by the one-way guide action of the electric worm and the drive gear, and the screw position is further fixed by the threaded connection between the screw and the drive gear, thereby facilitating long-term and stable suspension work.

[0011] The present invention provides a lifting device for a cantilever crane, which has the following beneficial effects: 1. The lifting device of the cantilever crane is provided with a pushing device. The pushing device pushes the hydraulic oil to be filtered along the filtering device. The hydraulic oil enters the interior of the guide device and then enters the interior of the fixed end of the hydraulic telescopic rod after being filtered, thereby driving the hydraulic telescopic rod to move, thereby driving the movable end of the hydraulic telescopic rod to rise, and automatically stops through the one-way transmission of the guide device. Compared with the traditional driving method, no additional driving intervention is required, which is conducive to long-term suspension operations.

[0012] 2. The lifting device used in the cantilever crane is provided with an oil inlet pipe. The hydraulic oil is introduced along the oil inlet pipe and flows along the side of the sliding sleeve into the side of the limit assembly, and reaches the side of the guide pipe through the fixed pipe, and flows along the inclined inner wall of the guide pipe, thereby pushing the baffle to move, thereby driving the fixed rod to slide along the inner wall of the limit assembly. The hydraulic oil is released through the pressure relief hole, thereby driving 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 baffle and supports the baffle through the fixed frame, thereby driving the baffle to slide along the inner wall of the guide pipe, thereby sealing, and the baffle is driven to slide by the elastic force of the spring, thereby avoiding pressure release, and the setting of the positioning groove ensures the seal with the guide pipe.

[0013] 3. The lifting device used in the cantilever crane is provided with a sliding base, which is used to limit the sliding trajectory of the fixed rod and transport hydraulic oil through the gap between the connecting brackets. At the same time, the setting of the spring base provides support for the side of the spring, thereby ensuring that the fixed rod slides along the fixed trajectory while maintaining the circulation of hydraulic oil.

[0014] 4. The lifting device used in the cantilever crane is provided with hydraulic oil flowing along the side of the connecting tube. The hydraulic oil is filtered by the filter ring and flows along the liquid inlet pipe, thereby contacting the side of the arc-shaped spire, thereby driving the flow of debris, etc., so that the debris enters the side under the guidance of the arc-shaped spire. The hydraulic oil is filtered through the filter plate, and metal debris enters the side along the surface of the arc-shaped spire, thereby collecting the metal debris, so that the metal debris is collected between the liquid inlet pipe and the inner wall of the connecting cylinder, thereby concentrating the metal debris. When maintenance is required, the stud is manually rotated, and the stud drives the sliding frame to move up and down, thereby driving the sliding frame to move, and the connecting cylinder fixedly connected to the side of the sliding frame is replaced, so that the collected connecting cylinder is removed from the oil delivery pipeline, thereby enabling quick maintenance and replacement, and the position of the sliding frame is stabilized by the setting of the stud, thereby facilitating the unobstructed oil path, starting the electric worm, and the electric worm rotates to drive the drive gear, and the drive gear rotates to drive the screw to move, and the screw movement drives the conical oil plug to move, thereby promoting the flow of hydraulic oil inside the oil storage tank, thereby driving the hydraulic telescopic rod, and the position of the conical oil plug is fixed by the one-way guide action of the electric worm and the drive gear, and the screw position is further fixed by the threaded connection between the screw and the drive gear, thereby facilitating long-term and stable suspension work. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic structural diagram of a lifting device for a cantilever crane according to the present invention; Figure 2This is a structural schematic diagram of the lifting device of the present invention; Figure 3 Schematic diagram of the structure of the flow guide device of the present invention; Figure 4 This is a schematic structural diagram of the sliding assembly of the present invention; Figure 5 This is a schematic diagram of the structure of the limit assembly of the present invention; Figure 6 This is a schematic structural diagram of the filtering device of the present invention; Figure 7 This is a schematic diagram of the structure of the filter assembly of the present invention; Figure 8 It is a schematic structural diagram of the pushing device of the present invention.

[0016] In the figure: 1. Fixed base; 2. Lifting device; 3. Suspension rod; 4. Winch; 201. Hydraulic telescopic rod; 202. Diversion device; 203. Filter device; 204. Pushing device; 2021. Oil inlet pipe; 2022. Fixed pipe; 2023. Diversion pipe; 2024. Sliding assembly; 2025. Limiting assembly; 2026. Spring; 2027. Sliding sleeve; 20241. Blocking plate; 20242. Fixed bracket; 20243. Positioning groove; 20244. Pressure relief hole; 20245. Fixed rod; 20246. Spring seat ; 20251, sliding base; 20252, connecting bracket; 20253, sliding hole; 20254, spring base; 2031, fixed frame; 2032, slide bar; 2033, sliding frame; 2034, stud; 2035, filter assembly; 20351, connecting cylinder; 20352, filter ring; 20353, liquid inlet pipe; 20354, filter plate; 20355, arc-shaped spire; 2041, oil storage tank; 2042, tapered oil plug; 2043, screw; 2044, drive gear; 2045, electric worm. DETAILED DESCRIPTION

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] See also Figure 1-Figure 2 The present invention provides a technical solution: a lifting device for a cantilever crane, comprising 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.

[0019] The fixed base 1 supports the equipment as a whole, and the lifting device 2 pushes the suspension rod 3, thereby driving the winch 4 to rise, thereby lifting. The hydraulic oil is pushed on the components used by the lifting device 2, thereby moving the components corresponding to the driving lifting device 2, and the hydraulic oil is filtered and one-way driven to prevent the problem of accidental descent during the lifting process, and the hydraulic oil is filtered through the corresponding components to collect the metal debris generated when the components are active, so as to avoid the problem of metal debris affecting the lifting effect and causing scratches and pressure relief during movement.

[0020] The lifting device 2 includes a hydraulic telescopic rod 201, and the side of the fixed end of the hydraulic telescopic rod 201 is connected to a flow guide device 202, and the end of the flow guide device 202 away from the hydraulic telescopic rod 201 is fixedly connected to a filtering device 203, and the side of the filtering device 203 is fixedly connected to a pushing device 204. The fixed end of the hydraulic telescopic rod 201 is connected to the side of the pushing device 204 through a pipeline, the fixed end of the hydraulic telescopic rod 201 is fixedly connected to the top of the fixed base 1, and the movable end of the hydraulic telescopic rod 201 is fixedly connected to the bottom of the suspension rod 3.

[0021] The pushing device 204 pushes the hydraulic oil to be filtered along the filtering device 203. The hydraulic oil enters the interior of the guide device 202 and the fixed end of the hydraulic telescopic rod 201 after being filtered, thereby driving the hydraulic telescopic rod 201 to move, thereby driving the movable end of the hydraulic telescopic rod 201 to rise, and automatically stops through the one-way transmission of the guide device 202. Compared with the traditional driving method, no additional driving intervention is required, which is conducive to long-term suspension operations.

[0022] See also Figures 1-4 The present invention provides a technical solution: the guide device 202 includes an oil inlet pipe 2021, the side of the oil inlet pipe 2021 is connected to a fixed pipe 2022, the side of the fixed pipe 2022 is connected to a guide pipe 2023, the inner wall of the filter device 203 is slidably connected to a sliding component 2024, the side of the sliding component 2024 is sleeved and slidably connected to a limiting component 2025, the side of the limiting component 2025 is fixedly connected to a spring 2026, the side of the sliding component 2024 is sleeved and slidably connected to a sleeve 2027, the sleeve 2027 is fixedly connected to the inner wall of the oil inlet pipe 2021 through a bracket, the side of the guide pipe 2023 is connected to the fixed end of the hydraulic telescopic rod 201, and the side of the limiting component 2025 is fixedly connected to the inner wall of the fixed pipe 2022.

[0023] The sliding assembly 2024 includes a blocking plate 20241, the side of the blocking plate 20241 is fixedly connected to a fixing frame 20242, a positioning groove 20243 is provided on the side of the blocking plate 20241 away from the fixing frame 20242, a pressure relief hole 20244 is provided on the side of the positioning groove 20243, a fixing rod 20245 is fixedly connected to the center position of the side of the blocking plate 20241, and the end of the fixing rod 20245 away from the blocking plate 20241 is fixedly connected to a spring seat 20246, the side of the spring seat 20246 is fixedly connected to the side of the spring 2026, and the inner wall of the guide tube 2023 is provided with a sliding groove adapted to the positioning groove 20243.

[0024] The hydraulic oil is introduced along the oil inlet pipe 2021, flows along the side of the sliding sleeve 2027 into the side of the limit assembly 2025, and reaches the side of the guide pipe 2023 through the fixed pipe 2022, and flows along the inclined inner wall of the guide pipe 2023, thereby pushing the blocking plate 20241 to move, thereby driving the fixed rod 20245 to slide along the inner wall of the limit assembly 2025, and the hydraulic oil is released through the pressure relief hole 20244, thereby driving the hydraulic telescopic rod 20241 to move. 01 is movable, and when the hydraulic telescopic rod 201 bears the load, the pressure of the hydraulic oil directly acts on the side 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 guide tube 2023, thereby sealing, and driving the blocking plate 20241 to slide through the elastic force of the spring 2026, thereby avoiding pressure release, and the setting of the positioning groove 20243 ensures the seal with the guide tube 2023.

[0025] See also Figure 1-Figure 5 The present invention provides a technical solution: the limiting component 2025 includes a sliding base 20251, the side of the sliding base 20251 is fixedly connected to a connecting bracket 20252, a sliding hole 20253 is opened at the center position of the side of the sliding base 20251, and the side of the sliding base 20251 is fixedly connected to 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 slidably connected to the side of the fixed rod 20245, one end of the spring 2026 away from the spring seat 20246 is fixedly connected to the side of the spring base 20254, and one end of the connecting bracket 20252 away from the sliding base 20251 is fixedly connected to the inner wall of the fixed tube 2022.

[0026] The sliding base 20251 is used to limit the sliding trajectory of the fixed rod 20245, and the hydraulic oil is transported through the gap between the connecting brackets 20252. At the same time, the setting of the spring base 20254 provides support for the side of the spring 2026, thereby ensuring that the fixed rod 20245 slides along the fixed trajectory while maintaining the circulation of hydraulic oil.

[0027] See also Figures 1-8 The present invention provides a technical solution: the filtering device 203 includes a fixed frame 2031, the inner wall of the fixed frame 2031 is fixedly connected with a sliding bar 2032, the side of the sliding bar 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 filtering assembly 2035, the side of the fixed frame 2031 is fixedly connected to the side of the oil inlet pipe 2021, and the side of the sliding frame 2033 is connected to the side of the oil inlet pipe 2021.

[0028] The filter assembly 2035 includes a connecting tube 20351, a filter ring 20352 is fixedly connected to the side of the connecting tube 20351, the side of the filter ring 20352 is connected to the liquid inlet pipe 20353, a filter plate 20354 is fixedly connected to the middle position of the inner wall of the connecting tube 20351, an arc-shaped spire 20355 is fixedly connected to the side of the filter plate 20354, and the side of the connecting tube 20351 is fixedly connected to the inner wall of the sliding frame 2033.

[0029] The sliding assembly 2024 includes an oil storage tank 2041, the inner wall of the oil storage tank 2041 is slidingly connected to a conical oil plug 2042, the side of the conical oil plug 2042 is fixedly connected to a screw 2043, the side of the screw 2043 is sleeved and threadedly connected to 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 to the side of the oil storage tank 2041, and the side of the oil storage tank 2041 is fixedly connected to the side of the fixed frame 2031.

[0030] 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, thereby contacting the side of the arc-shaped spire 20355, thereby driving the flow of debris, etc., so that the debris enters the side of 30353 under the guidance of the arc-shaped spire 20355. The hydraulic oil is filtered through the filter plate 20354, and the metal debris enters the side of 30353 along the surface of the arc-shaped pinnacle 20355, thereby collecting 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, thereby concentrating the metal debris. When maintenance is required, the stud 2034 is manually rotated, and the stud 2034 drives the sliding frame 2033 to move up and down, thereby driving 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, thereby enabling quick maintenance and replacement, and through the design of the stud 2034 The position of the sliding frame 2033 is stabilized to facilitate keeping the oil circuit unobstructed, and the electric worm 2045 is started. The electric worm 2045 rotates to drive the driving gear 2044. The driving gear 2044 rotates to drive the screw 2043 to move. The movement of the screw 2043 drives the conical oil plug 2042 to move, thereby promoting the flow of hydraulic oil inside the oil storage tank 2041, thereby driving the hydraulic telescopic rod 201, and fixing the position of the conical oil plug 2042 through the one-way guiding effect of the electric worm 2045 and the driving gear 2044, and further fixing the position of the screw 2043 through the threaded connection between the screw 2043 and the driving gear 2044, thereby facilitating long-term and stable suspension work.

[0031] Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without making creative efforts should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention shall be implemented in accordance with conventional means in the field unless otherwise specified or limited.

Claims

1. A lifting device for a cantilever crane, characterized in that: It comprises a fixed base (1), the top of the fixed base (1) is fixedly connected to a lifting device (2), the top of the lifting device (2) is fixedly connected to a suspension rod (3), and the bottom of the suspension rod (3) is fixedly connected to a winch (4); The lifting device (2) comprises a hydraulic telescopic rod (201), the fixed end of the hydraulic telescopic rod (201) is connected to a flow guide device (202) on the side, the end of the flow guide device (202) away from the hydraulic telescopic rod (201) is fixedly connected to a filtering device (203), the side of the filtering device (203) is fixedly connected to a pushing device (204), the fixed end of the hydraulic telescopic rod (201) is connected to the side of the pushing device (204) through a pipeline, the fixed end of the hydraulic telescopic rod (201) is fixedly connected to the top of the fixed base (1), and the movable end of the hydraulic telescopic rod (201) is fixedly connected to the bottom of the suspension rod (3).

2. The lifting device for a jib crane according to claim 1, characterized in that: The flow guiding device (202) comprises an oil inlet pipe (2021), a side of the oil inlet pipe (2021) is connected to a fixed pipe (2022), a side of the fixed pipe (2022) is connected to a flow guiding pipe (2023), an inner wall of the filtering device (203) is slidably connected to a sliding component (2024), a side of the sliding component (2024) is sleeved with and slidably connected to a limiting component (2025), a side of the limiting component (2025) is fixedly connected to a spring (2026), a side of the sliding component (2024) is sleeved with and slidably connected to a sliding sleeve (2027), the sliding sleeve (2027) is fixedly connected to the inner wall of the oil inlet pipe (2021) via a bracket, a side of the flow guiding pipe (2023) is connected to a fixed end of the hydraulic telescopic rod (201), and a side of the limiting component (2025) is fixedly connected to the inner wall of the fixed pipe (2022).

3. The lifting device for a jib crane according to claim 2, characterized in that: The sliding assembly (2024) includes a blocking plate (20241), a side of the blocking plate (20241) is fixedly connected to a fixing frame (20242), a side of the blocking plate (20241) away from the fixing frame (20242) is provided with a positioning groove (20243), a side of the positioning groove (20243) is provided with a pressure relief hole (20244), a fixing rod (20245) is fixedly connected to the center position of the side of the blocking plate (20241), an end of the fixing rod (20245) away from the blocking plate (20241) is fixedly connected to a spring seat (20246), a side of the spring seat (20246) is fixedly connected to a side of the spring (2026), and an inner wall of the guide tube (2023) is provided with a sliding groove adapted to the positioning groove (20243).

4. The lifting device for a jib crane according to claim 2, characterized in that: The limiting component (2025) includes a sliding base (20251), a connecting bracket (20252) is fixedly connected to the side of the sliding base (20251), a sliding hole (20253) is opened at the center position of the side of the sliding base (20251), and a spring base (20254) is fixedly connected to the side of the sliding base (20251), and the sliding base (20251) is sleeved on the side of the fixed rod (20245) through the sliding hole (20253) and is slidably connected to the side of the fixed rod (20245).

5. The lifting device for a jib crane according to claim 4, characterized in that: One end of the spring (2026) away from the spring seat (20246) is fixedly connected to the side of the spring base (20254), and one end of the connecting bracket (20252) away from the sliding base (20251) is fixedly connected to the inner wall of the fixed tube (2022).

6. The lifting device for a jib crane according to claim 1, characterized in that: The filtering device (203) comprises a fixed frame (2031), the inner wall of the fixed frame (2031) is fixedly connected to a slide bar (2032), the side of the slide bar (2032) is slidably connected to a sliding frame (2033), the top of the sliding frame (2033) is rotatably connected to a stud (2034), and the inner wall of the sliding frame (2033) is fixedly connected to a filtering assembly (2035).

7. The lifting device for a jib crane according to claim 6, characterized in that: The side surface of the fixed frame (2031) is fixedly connected to the side surface of the oil inlet pipe (2021), and the side surface of the sliding frame (2033) is communicated with the side surface of the oil inlet pipe (2021).

8. The lifting device for a jib crane according to claim 6, characterized in that: The filter assembly (2035) comprises a connecting tube (20351), a filter ring (20352) is fixedly connected to the side of the connecting tube (20351), a liquid inlet pipe (20353) is connected to the side of the filter ring (20352), a filter plate (20354) is fixedly connected to the middle position of the inner wall of the connecting tube (20351), an arc-shaped spire (20355) is fixedly connected to the side of the filter plate (20354), and the side of the connecting tube (20351) is fixedly connected to the inner wall of the sliding frame (2033).

9. The lifting device for a jib crane according to claim 2, characterized in that: The sliding assembly (2024) includes an oil storage tank (2041), the inner wall of the oil storage tank (2041) is slidably connected to a conical oil plug (2042), the side of the conical oil plug (2042) is fixedly connected to a screw (2043), the side of the screw (2043) is sleeved and threadedly connected to a driving gear (2044), the top of the driving gear (2044) is meshed with an electric worm (2045), the side of the electric worm (2045) is fixedly connected to the side of the oil storage tank (2041), and the side of the oil storage tank (2041) is fixedly connected to the side of the fixed frame (2031).

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