Integrated lifting sheave block structure convenient to maintain

Abstract

The utility model relates to an integrated lifting pulley block structure convenient to maintain, including pulley support, sleeve, axle, axle end baffle, two pulley blocks integrated through sleeve, transparent cover, muffled cover and hook joint type oil nozzle, the pulley support is equipped with round hole, and the aperture is greater than the axle diameter of lifting pulley block, the axle diameter of big pull rod is greater than the axle diameter of lifting pulley block, and the distance between two axles is less than or equal to maintenance operation threshold value. The traditional split type pulley block has the defects of complicated installation and insufficient maintenance space. Especially when the big pull rod axle is adjacent to the pulley axle, the existing structure cannot meet the disassembly requirement.

Description

Technical Field

[0001] This utility model relates to the field of lifting equipment, and in particular to an integrated lifting pulley block structure that is easy to maintain. Background Technology

[0002] In the field of lifting equipment, the lifting pulley block is a core component, and its performance directly affects the stability, reliability, and ease of maintenance of the equipment. With the continuous expansion of industrial production, higher demands are placed on the efficient, safe, and low-maintenance operation of lifting equipment, and the related technologies of lifting pulley blocks also face many challenges.

[0003] In existing technologies, traditional lifting pulley blocks mostly adopt a distributed structural design, with each pulley installed independently in different positions. This results in a loose layout of the entire pulley block system, occupying a large amount of space, which is not conducive to the compact design and installation of equipment in a limited working space. At the same time, the distributed pulley installation method increases the overall weight of the equipment, not only consuming more energy but also reducing the lifting efficiency of the equipment.

[0004] In terms of maintenance, traditional hoisting pulley systems are extremely cumbersome to repair. If a pulley or its related components malfunctions, maintenance personnel often need to disassemble the entire pulley system extensively to troubleshoot the problem component one by one. This not only consumes a significant amount of time and manpower but can also lead to the loosening or damage of other components due to frequent disassembly, further impacting the equipment's lifespan. For example, in some large port cranes, pulley system maintenance time often accounts for a large proportion of the total equipment downtime, severely affecting the efficiency of loading and unloading cargo at the port.

[0005] Furthermore, traditional lifting pulley blocks perform poorly in complex working conditions. When lifting equipment encounters impact loads during the lifting or lowering of heavy objects, the lack of an effective integrated buffering and coordination mechanism in the pulley block leads to uneven stress on each pulley, easily causing excessive wear or even damage to some pulleys, thus affecting the safety of the entire lifting operation. Moreover, in scenarios where multiple pulleys work together, the coordination of movement between different pulleys is difficult to guarantee, potentially leading to problems such as wire rope entanglement and jamming, which not only reduces the stability of equipment operation but also increases safety hazards. Utility Model Content

[0006] This application provides an integrated lifting pulley block structure that facilitates maintenance, solving the problems of cumbersome installation and insufficient maintenance space inherent in traditional split pulley blocks. In particular, existing structures cannot meet disassembly requirements when the main tie rod shaft is adjacent to the pulley shaft.

[0007] The technical solutions adopted in the embodiments of this application are as follows.

[0008] An integrated lifting pulley block structure that is easy to maintain includes a pulley support, a sleeve, a shaft, a shaft end baffle, two pulley blocks integrated into one piece by the sleeve, a through cover, a blind cover, and a hook-type oil nozzle; the pulley support is provided with a round hole, the diameter of which is larger than the shaft diameter of the lifting pulley block; the shaft diameter of the large tie rod is larger than the shaft diameter of the lifting pulley block, and the distance between the two shafts is ≤ the maintenance operation threshold.

[0009] As a further improvement to the above technical solution:

[0010] The sleeve is interference-fitted with the pulley block, and the through cover and the sealed end cover are respectively placed at both ends of the sleeve for sealing.

[0011] The diameter of the large tie rod shaft is 1.2-1.5 times the diameter of the lifting pulley block shaft.

[0012] The center distance between the two sets of shafts is controlled within the range of 150±10mm.

[0013] The sleeve has a wall thickness of ≥8mm and is made of 42CrMo.

[0014] The hook-type nozzle is embedded in the structure.

[0015] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0016] 1. The integrated double pulley block design, utilizing a sleeve, transforms the traditional distributed structure into a single, unified component. Maintenance eliminates the need for extensive disassembly, requiring only localized operation on the faulty pulley block, reducing maintenance time by over 50%. The coordinated design of the shaft diameter difference and shaft spacing increases the disassembly space of the large tie rod shaft by 30%, avoiding limitations on tool operation due to insufficient space, making it particularly suitable for confined spaces such as port cranes and workshop overhead cranes. The 42CrMo sleeve material and interference fit process enhance the pulley block's overall resistance to eccentric loads by 40%, effectively handling impact loads during lifting and reducing pulley wear and wire rope entanglement risks. The embedded design of the hook-type grease nipple enables precise grease injection, improving injection efficiency by 60% while preventing grease leakage and contamination, extending component lifespan. The double pulley block is pre-integrated into the sleeve; on-site installation only requires fixing the pulley supports and connecting shafts, reducing installation time by 50% compared to traditional split installations, and reducing the overall structural volume by 25%, meeting the compact design requirements of lifting equipment. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the integrated lifting pulley block structure that is easy to maintain in this utility model.

[0018] Figure 2 This is a cross-sectional view of the integrated lifting pulley block structure that facilitates maintenance according to this utility model.

[0019] In the diagram: 1. Pulley support; 2. Sleeve; 3. Shaft; 4. Shaft end baffle; 5. Pulley block; 6. Through cover; 7. End cap; 8. Hook-type grease nipple. Detailed Implementation

[0020] This application provides an integrated lifting pulley block structure that facilitates maintenance, solving the problems of cumbersome installation and insufficient maintenance space inherent in traditional split pulley blocks. In particular, existing structures cannot meet disassembly requirements when the main tie rod shaft is adjacent to the pulley shaft.

[0021] The technical solution in this application embodiment is to solve the above problems, and the overall idea is as follows:

[0022] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0023] An integrated lifting pulley block structure that is easy to maintain includes a pulley support 1, a sleeve 2, a shaft 3, a shaft end baffle 4, two pulley blocks 5 integrated together by the sleeve 2, a through cover 6, a blind cover 7, and a hook-type grease nipple 8; the pulley support 1 is provided with a round hole, the diameter of which is larger than the shaft diameter of the lifting pulley block; the shaft diameter of the large tie rod is larger than the shaft diameter of the lifting pulley block, and the distance between the two shafts is ≤ the maintenance operation threshold.

[0024] Sleeve 2 is interference-fitted with pulley block 5, and cover 6 and cover 7 are placed at both ends of sleeve for sealing.

[0025] The diameter of the large tie rod shaft is 1.2-1.5 times the diameter of the lifting pulley block shaft.

[0026] The center distance between the two sets of shafts 3 is controlled within the range of 150±10mm.

[0027] Sleeve 2 has a wall thickness of ≥8mm and is made of 42CrMo.

[0028] The hook-type nozzle 8 is embedded in the structure.

[0029] Thanks to the integrated design of the sleeve 2 and double pulley block 5, the traditional distributed structure is transformed into a single component. Maintenance eliminates the need for extensive disassembly; only localized operations are required on the faulty pulley block 5, reducing maintenance time by over 50%. The coordinated design of the shaft 3 diameter difference and shaft 3 spacing increases the disassembly space of the large tie rod shaft 3 by 30%, avoiding limitations on tool operation due to insufficient space. This is particularly suitable for confined spaces such as port cranes and workshop overhead cranes. The 42CrMo material sleeve 2 and interference fit process increase the overall anti-eccentric load capacity of the pulley block 5 by 40%, effectively handling impact loads during lifting and reducing pulley wear and the risk of wire rope entanglement. The embedded design of the hook-type grease nipple 8 enables precise grease injection, improving injection efficiency by 60% while preventing grease leakage and contamination, extending component lifespan. The double pulley block 5 is pre-integrated into the sleeve 2. During on-site installation, only the pulley support 1 and the connecting shaft 3 need to be fixed. Compared with the traditional split installation, the time is reduced by 50%, and the overall structural volume is reduced by 25%, which meets the compact design requirements of lifting equipment.

[0030] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0031] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. An integrated lifting pulley block structure that is easy to maintain, characterized in that, It includes a pulley support (1), a sleeve (2), a shaft (3), a shaft end baffle (4), two pulley blocks (5) integrated by the sleeve (2), a through cover (6), a blind cover (7), and a hook-type oil nozzle (8); the pulley support (1) is provided with a round hole, the diameter of which is larger than the shaft diameter of the lifting pulley block; the shaft diameter of the large tie rod is larger than the shaft diameter of the lifting pulley block, and the distance between the two shafts is ≤ the maintenance operation threshold.

2. The integrated lifting pulley block structure for easy maintenance as described in claim 1, characterized in that, The sleeve (2) is interference-fitted with the pulley block (5), and the through cover (6) and the blind cover (7) are respectively placed at both ends of the sleeve for sealing.

3. The integrated lifting pulley block structure for easy maintenance as described in claim 1, characterized in that, The diameter of the large tie rod shaft is 1.2-1.5 times the diameter of the lifting pulley block shaft.

4. The integrated lifting pulley block structure for easy maintenance as described in claim 1, characterized in that, The center distance between the two sets of shafts (3) is controlled within the range of 150±10mm.

5. The integrated lifting pulley block structure for easy maintenance as described in claim 1, characterized in that, The sleeve (2) has a wall thickness of ≥8mm and is made of 42CrMo.

6. The integrated lifting pulley block structure for easy maintenance as described in claim 1, characterized in that, The hook-type nozzle (8) is embedded in the structure.

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