A hydraulic telescopic ship crane folding arm structure

Abstract

The utility model relates to a marine crane technical field especially is a hydraulic telescopic marine crane folding arm structure, including the body and folding arm subassembly, the end of folding arm subassembly is equipped with pulley assembly and lifting hook, the cable of lifting hook is connected with pulley assembly, the top of pulley assembly is equipped with lubricating assembly, lubricating assembly includes oil storage box, the below of oil storage box is equipped with lubricating box, is equipped with oil guiding chamber in lubricating box, is equipped with oil guiding structure in oil guiding chamber, the top of lubricating box is equipped with oil inlet hole, the bottom of lubricating box is equipped with oil outlet hole, the bottom of oil storage box is connected with the first oil guiding groove that passes through the oil inlet hole and lubricating box intercommunication, in the utility model, lubricating assembly can provide stable initiative lubrication, forms the uniform lubricating film, reduces pulley and cable friction coefficient greatly, avoids rotation jam to guarantee hoisting efficiency, reduces pulley wear and tear and cable broken silk risk, prolongs the life of component, provides stable and safe guarantee for marine hoisting operation.

Description

Technical Field

[0001] This utility model relates to the field of marine crane technology, specifically to a hydraulic telescopic marine crane folding arm structure. Background Technology

[0002] Marine cranes are specialized lifting equipment installed on ships to load, unload, and transfer cargo, equipment, or personnel. Their core function is to lift heavy objects between ships and docks, between ships, and to allocate materials within ships in marine or port environments. Some large marine cranes are also equipped with counterweights or stabilization systems to counteract overturning moments during lifting. In marine crane lifting operations, the pulleys near the hook are directly connected to the slings and must bear the vertical tension of the load. In addition, the hook will also swing laterally and rotate circumferentially under the influence of ocean waves. The additional lateral shear stress causes the friction coefficient between the pulley and the slings to increase significantly. Therefore, the pulley is prone to jamming, which not only affects the lifting efficiency but also increases the risk of sling breakage and cargo falling. Therefore, a hydraulic telescopic marine crane folding arm structure is proposed to address the above problems. Utility Model Content

[0003] The purpose of this utility model is to provide a hydraulic telescopic marine crane folding arm structure to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A hydraulic telescopic marine crane folding boom structure includes a body and a folding boom assembly. A pulley assembly and a hook are provided at the end of the folding boom assembly. The hook's sling is connected to the pulley assembly. A lubrication assembly is provided above the pulley assembly. The lubrication assembly includes an oil reservoir and a lubrication box below the oil reservoir. An oil guiding cavity is formed within the lubrication box, and an oil guiding structure is provided within the oil guiding cavity. An oil inlet is formed at the top of the lubrication box, and an oil outlet is formed at the bottom of the lubrication box. A first oil guiding groove, connected to the lubrication box via the oil inlet, is connected to the bottom of the oil reservoir. A second oil guiding groove, connected to the bottom of the lubrication box via the oil outlet, is provided below the second oil guiding groove. An oil distribution plate and a lubrication brush are provided below the second oil guiding groove.

[0005] As a further optimization of this utility model, the pulley assembly includes a support rod and a pulley body. The two ends of the support rod are fixedly connected to the inner side of the end of the folding arm assembly, and the pulley body is rotatably connected to the support rod.

[0006] As a further optimization of this utility model, the oil storage box is symmetrically and fixedly connected to two connecting frames on both sides, and the end of the connecting frame away from the oil storage box is sleeved on the outside of the support rod.

[0007] As a further optimization of this utility model, the oil guiding cavity is a cylindrical cavity, and the oil guiding structure includes a transmission shaft coaxially arranged with the oil guiding cavity. The transmission shaft is driven by an external motor, and multiple oil guiding plates arranged in a circumferential array and consistent with the depth of the oil guiding cavity are fixedly connected to the outside of the transmission shaft.

[0008] As a further optimization of this utility model, the oil guide plate is fixedly connected to a rubber sealing gasket at one end away from the drive shaft, the rubber sealing gasket being hollow inside, and the inner cavity of the rubber sealing gasket having a sealing airbag that fits against its inner wall.

[0009] As a further optimization of this utility model, the bottom shape of the oil distribution plate is adapted to the bottom shape of the second oil guide groove, the top shape of the lubrication brush is adapted to the shape of the oil distribution plate, and multiple oil distribution holes are arranged at equal intervals on the oil distribution plate.

[0010] As a further optimization of this utility model, the bottom of the lubricating brush is adapted to the inner shape of the pulley body, and the bottom of the lubricating brush is in contact with the inner side of the pulley body.

[0011] Compared with the prior art, the beneficial effects of this utility model are: In this invention, the lubrication components can provide stable active lubrication, forming a uniform lubricating film, which significantly reduces the friction coefficient between the pulley and the sling, prevents rotational jamming to ensure lifting efficiency, and can resist the effects of salt spray in the marine environment, prevent lubrication failure, reduce pulley wear and the risk of sling breakage, extend component life, and provide a stable and safe guarantee for marine lifting operations. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This utility model Figure 1 Enlarged view of point A; Figure 3 This is a schematic diagram of the structure of the lubrication component of this utility model; Figure 4 This is an exploded view of the structure of the lubrication component of this utility model; Figure 5 This is an exploded view of the structure of the lubrication box of this utility model; Figure 6 This is a cross-sectional view of the lubrication box of this utility model; Figure 7 This is a cross-sectional view of the rubber sealing gasket of this utility model.

[0013] In the diagram: 1. Body; 2. Folding arm assembly; 3. Pulley assembly; 31. Support rod; 32. Pulley body; 4. Hook; 5. Lubrication assembly; 51. Oil reservoir; 52. Lubrication box; 53. Oil guide chamber; 54. Oil guide structure; 541. Drive shaft; 542. Oil guide plate; 543. Rubber sealing gasket; 544. Sealing airbag; 55. First oil guide groove; 56. Second oil guide groove; 57. Oil distributor plate; 58. Oil distributor hole; 59. Lubrication brush. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0016] Please see Figures 1-7 This utility model provides a technical solution: A hydraulic telescopic marine crane folding boom structure includes a body 1 and a folding boom assembly 2. A pulley assembly 3 and a hook 4 are provided at the end of the folding boom assembly 2. The sling of the hook 4 is connected to the pulley assembly 3. A lubrication assembly 5 is provided above the pulley assembly 3. The lubrication assembly 5 includes an oil reservoir 51 and a lubrication box 52 below the oil reservoir 51. An oil guiding cavity 53 is provided inside the lubrication box 52, and an oil guiding structure 54 is provided inside the oil guiding cavity 53. An oil inlet is provided at the top of the lubrication box 52, and an oil outlet is provided at the bottom of the lubrication box 52. A first oil guiding groove 55, which is connected to the lubrication box 52 through the oil inlet, is connected to the bottom of the oil reservoir 51 through the oil outlet. A second oil guiding groove 56, which is connected to the bottom of the lubrication box 52 through the oil outlet, is provided below the second oil guiding groove 56. An oil distribution plate 57 and a lubrication brush 59 are provided below the second oil guiding groove 56.

[0017] It should be noted that: the body 1 serves as the fixed base of the crane. The extension and folding of the boom assembly 2 (multi-section telescopic boom structure) are controlled by the hydraulic drive device to realize the lifting and horizontal movement of the hook 4, which meets the working conditions of loading and unloading cargo on ships (such as containers and bulk cargo). The pulley assembly 3 is a key component of the sling drive. Its smooth operation directly affects the lifting efficiency and safety. However, the marine environment (high humidity, salt spray corrosion, dust) can easily lead to increased friction between the pulley body 32 and the sling, and corrosion and jamming of the components. Therefore, a lubrication assembly 5 is required. The oil storage box 51 is used to store special lubricating grease (such as marine extreme pressure lithium-based grease). The oil guide cavity 53 in the lubrication box 52 cooperates with the oil guide structure 54 to realize the uniform delivery and flow control of grease. The second oil guide groove 56 guides the grease to the oil distribution plate 57. After the oil is separated, it is evenly applied to the surface of the pulley body 32 in the pulley assembly 3 by the lubrication brush 59 to form a continuous lubricating film, reduce friction and wear, and isolate salt spray and moisture to delay corrosion. As a further implementation of this solution, the pulley assembly 3 includes a support rod 31 and a pulley body 32. The two ends of the support rod 31 are fixedly connected to the inner side of the end of the folding arm assembly 2, and the pulley body 32 is rotatably connected to the support rod 31. It should be noted that: the support rod 31 serves as the support shaft for the pulley body 32, and its two ends are fixed to the inner side of the end of the folding arm assembly 2 by welding or high-strength bolts to ensure no loosening in the axial and radial directions. It can withstand the vertical load transmitted by the sling and meet the lifting requirements of the ship. The pulley body 32 is rotatably connected to the support rod 31 through bearings. Its wheel groove (the width of which is adapted to the diameter of the sling) is used to accommodate the sling. The smoothness of the rotation of the pulley body 32 directly affects the lifting efficiency. If jamming or wear occurs, it will lead to excessive local stress on the sling (easy breakage) or uneven lifting speed (causing cargo to sway). Therefore, it is necessary to use the lubrication assembly 5 to achieve continuous lubrication and extend the service life. As a further implementation of this scheme, the oil storage box 51 is symmetrically and fixedly connected to the two sides, and the end of the connecting frame away from the oil storage box 51 is sleeved on the outside of the support rod 31. It should be noted that the connecting frame is symmetrically welded to both sides of the oil reservoir 51, and its end is opened with a round hole that matches the outer diameter of the support rod 31. It is fitted onto the outside of the support rod 31 and fixed (to prevent axial sliding), so that the oil reservoir 51 and the pulley assembly 3 form an integral structure. The advantage of this installation method is that when the marine crane is operating, the ship will experience longitudinal or lateral turbulence due to the waves. By fixing the connecting frame to the support rod 31, the relative position of the oil reservoir 51, the lubrication box 52 and the pulley body 32 can always be stable, the grease delivery path is smooth, and at the same time, the connecting frame is prevented from blocking the lubrication area of ​​the pulley body 32, ensuring that the lubrication brush 59 can accurately contact the surface of the pulley body 32. As a further implementation of this solution, the oil guiding cavity 53 is a cylindrical cavity, and the oil guiding structure 54 includes a transmission shaft 541 coaxially arranged with the oil guiding cavity 53. The transmission shaft 541 is driven by an external motor, and multiple oil guiding plates 542 arranged in a circumferential array and with the same depth as the oil guiding cavity 53 are fixedly connected to the outside of the transmission shaft 541. It should be noted that the oil guide cavity 53 is designed as a cylinder and is coaxially set with the drive shaft 541 to ensure that there is no eccentricity when the drive shaft rotates. The external motor drives the drive shaft 541 to rotate through the reducer, which drives the outer oil guide plate 542 to rotate synchronously. The function of the oil guide plate 542 is to "separate the oil guide cavity 53 and quantitatively carry oil": adjacent oil guide plates 542 and the inner wall of the oil guide cavity 53 form independent "oil storage space". When the drive shaft 541 rotates, each oil storage space receives the lubricating grease from the first oil guide groove 55 from the oil inlet hole (the amount of oil carried at one time can be adjusted by the motor speed). With the rotation, the grease is transported to the oil outlet hole and discharged through the second oil guide groove 56. Compared with the traditional gravity dripping oil (which is easily affected by bumps and causes fluctuations in the amount of oil dripping), this active oil guiding method can control the deviation of the grease delivery within a small range, ensuring that the thickness of the lubricating grease on the surface of the pulley body 32 is uniform, which avoids excessive waste of grease and prevents dry friction caused by insufficient grease. As a further implementation of this solution, a rubber sealing gasket 543 with the same depth as the oil guide cavity 53 is fixedly connected to one end of the oil guide plate 542 away from the drive shaft 541. The rubber sealing gasket 543 is hollow inside, and a sealing airbag 544 that fits against its inner wall is provided in the inner cavity of the rubber sealing gasket 543. It should be noted that the rubber sealing gasket 543 is bonded and fixed to the end of the oil guide plate 542, and its length is consistent with the depth of the oil guide cavity 53, which can achieve axial full sealing of the oil guide cavity 53. The hollow internal design provides installation space for the sealing airbag 544. After the sealing airbag 544 is inflated, it is tightly attached to the inner wall of the rubber sealing gasket 543, so that the outer side of the rubber sealing gasket 543 is tightly attached to the inner wall of the oil guide cavity 53, eliminating the gap between the oil guide plate 542 and the cavity wall. As a further implementation of this scheme, the bottom shape of the oil distribution plate 57 is adapted to the bottom shape of the second oil guide groove 56, the top of the lubrication brush 59 is adapted to the shape of the oil distribution plate 57, and multiple oil distribution holes 58 are arranged at equal intervals on the oil distribution plate 57. It should be noted that: the oil distribution plate 57 is fixed below the second oil guide groove 56, and its surface is provided with oil distribution holes 58 at equal intervals to evenly distribute the grease delivered by the second oil guide groove 56, avoiding uneven application caused by grease concentration in a certain area. The top of the lubricating brush 59 is adapted to the shape of the oil distribution plate 57 and is fixed below the oil distribution plate 57 so that the top of the brush bristles is aligned with the oil distribution holes 58 to receive the distributed grease. The bottom of the lubricating brush 59 is adapted to the shape of the inner side of the pulley body 32 (such as arc-shaped bristles, which fit the curved surface of the pulley body 32 groove) and is in close contact with the inner side of the pulley body 32. When the pulley body 32 rotates, the brush bristles evenly apply the grease to the inner surface of the groove and the two end faces of the pulley body 32 to form a complete lubricating film, avoiding local wear of the groove caused by traditional single-point lubrication. As a further implementation of this solution, the bottom of the lubricating brush 59 is adapted to the inner shape of the pulley body 32, and the bottom of the lubricating brush 59 is in contact with the inner side of the pulley body 32. It should be noted that the inner side of the pulley body 32 (the groove and both end faces) is the area that comes into the most frequent contact and friction with the sling, and is also the part most prone to wear and corrosion. Therefore, the bottom of the lubrication brush 59 is designed to be an arc shape that matches the shape of the inner side of the pulley body 32 (the bristles at the groove are concave arcs, and the bristles at the end faces are flat), ensuring the bristles fit well with the surface of the pulley body 32 and avoiding lubrication dead corners. At the same time, the fit design between the lubrication brush 59 and the pulley body 32 can achieve "dynamic lubrication": when the pulley body 32 rotates with the sling, the relative sliding between the bristles and the surface of the pulley body 32 can evenly spread the grease and penetrate into the friction contact surface (such as the contact gap between the groove and the sling), forming a boundary lubrication film, reducing the coefficient of friction and reducing wear. In addition, the bristles can also clean the salt spray crystals, dust and other impurities on the surface of the pulley body 32, preventing impurities from getting trapped between the friction surfaces and aggravating wear, further extending the service life of the pulley body 32 and the sling, and making it suitable for the high-pollution and high-wear working environment of marine applications.

[0018] Work process: After the machine body 1 starts the lifting operation, the external motor of the lubrication component 5 is turned on simultaneously. The transmission shaft 541 drives the oil guide plate 542 to rotate. The independent oil storage space formed by the oil guide plate 542 and the oil guide cavity 53 receives the grease in the oil storage box 51 from the first oil guide groove 55. With the rotation, the grease is transported to the oil outlet, and then guided to the oil distribution plate 57 through the second oil guide groove 56. The oil distribution hole 58 evenly distributes the grease to the lubrication brush 59. When the pulley body 32 rotates, the brush bristles dynamically apply the grease to the inner surface of the wheel groove and the two end faces of both sides to form a continuous lubricating film and reduce the friction and wear between the sling and the pulley body 32. The oil reservoir 51 is fixed to the support rod 31 via a connecting bracket, ensuring that the first oil guide groove 55 and the oil inlet of the lubrication box 52 are always aligned, and the grease delivery is uninterrupted. The elastic compensation of the sealing airbag 544 can maintain the fit of the rubber sealing gasket 543 and prevent grease leakage. The fit design of the lubrication brush 59 not only provides continuous lubrication, but also cleans the salt spray crystals and dust on the surface of the pulley body 32, isolates salt spray and moisture, and reduces the corrosion rate of the pulley body 32. According to the location of the goods, the hydraulically driven folding arm assembly 2 extends and folds, adjusting the lifting radius. When the angle of the folding arm changes, the pulley assembly 3 moves synchronously with the folding arm. The lubrication assembly 5 is fixed as an integral part of the pulley assembly 3, always maintaining precise lubrication of the pulley body 32, avoiding lubrication dead zones caused by angle changes. The hook 4 rises and falls under the drive of the sling, and the pulley body 32 rotates with the sling, and the lubrication brush 59 continuously and dynamically supplies oil.

[0019] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hydraulic telescopic marine crane folding boom structure, comprising a body (1) and a folding boom assembly (2), characterized in that: The end of the articulated arm assembly (2) is provided with a pulley assembly (3) and a hook (4). The sling of the hook (4) is connected to the pulley assembly (3). A lubrication assembly (5) is provided above the pulley assembly (3). The lubrication assembly (5) includes an oil reservoir (51), a lubrication box (52) is provided below the oil reservoir (51), an oil guide cavity (53) is provided inside the lubrication box (52), an oil guide structure (54) is provided inside the oil guide cavity (53), an oil inlet hole is provided at the top of the lubrication box (52), an oil outlet hole is provided at the bottom of the lubrication box (52), a first oil guide groove (55) is connected to the bottom of the oil reservoir (51) through the oil inlet hole and connected to the lubrication box (52), a second oil guide groove (56) is connected to the bottom of the lubrication box (52) through the oil outlet hole, and an oil distribution plate (57) and a lubrication brush (59) are provided below the second oil guide groove (56).

2. The hydraulic telescopic marine crane folding boom structure according to claim 1, characterized in that: The pulley assembly (3) includes a support rod (31) and a pulley body (32). The two ends of the support rod (31) are fixedly connected to the inner side of the end of the folding arm assembly (2), and the pulley body (32) is rotatably connected to the support rod (31).

3. The hydraulic telescopic marine crane folding boom structure according to claim 2, characterized in that: The oil storage box (51) is symmetrically connected to the two sides by a connecting frame, and the end of the connecting frame away from the oil storage box (51) is sleeved on the outside of the support rod (31).

4. The hydraulic telescopic marine crane folding boom structure according to claim 1, characterized in that: The oil guide cavity (53) is a cylindrical cavity. The oil guide structure (54) includes a drive shaft (541) coaxially arranged with the oil guide cavity (53). The drive shaft (541) is driven by an external motor. Multiple oil guide plates (542) arranged in a circumferential array and with the same depth as the oil guide cavity (53) are fixedly connected to the outside of the drive shaft (541).

5. The hydraulic telescopic marine crane folding boom structure according to claim 4, characterized in that: The oil guide plate (542) is fixedly connected to a rubber sealing gasket (543) with the same depth as the oil guide cavity (53) at one end away from the drive shaft (541). The rubber sealing gasket (543) is hollow inside, and a sealing airbag (544) that fits against its inner wall is provided in the inner cavity of the rubber sealing gasket (543).

6. The hydraulic telescopic marine crane folding boom structure according to claim 1, characterized in that: The bottom shape of the oil distribution plate (57) is adapted to the bottom shape of the second oil guide groove (56), the top of the lubrication brush (59) is adapted to the shape of the oil distribution plate (57), and a plurality of oil distribution holes (58) are arranged at equal intervals on the oil distribution plate (57).

7. The hydraulic telescopic marine crane folding boom structure according to claim 1, characterized in that: The bottom of the lubricating brush (59) is adapted to the inner shape of the pulley body (32), and the bottom of the lubricating brush (59) is in contact with the inner side of the pulley body (32).

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