A c-shaped hook with replaceable boom length and a replacement bracket for placing

Abstract

A C-type hook for replacing boom length and its placement and replacement bracket mainly consist of three parts: the C-type hook, the placement and replacement bracket, and the boom transport vehicle. The C-type hook adopts a modular design, consisting of a frame and booms of various lengths. The boom is initially connected to the frame via a mortise and tenon structure and then mechanically secured with pins, ensuring a reliable structure and convenient assembly and disassembly. The placement and replacement bracket is equipped with a synchronous lifting robotic arm, which can precisely adjust the height of the frame, facilitating the installation and disassembly of the boom. The boom transport vehicle has grooves and straps that match the shape of the boom, facilitating the safe transportation and storage of the boom. This design effectively solves the problems of traditional integrated hooks, such as non-replaceable booms, high equipment redundancy, and difficult maintenance. It has the ability to quickly and safely replace booms, significantly improving the flexibility and economy of lifting operations, and is particularly suitable for applications such as shipyards, large equipment manufacturing, and heavy machinery installation.

Description

Technical Field

[0001] This utility model belongs to the technical field of lifting and hoisting equipment, specifically relating to a C-shaped hook for replacing the length of a boom and its placement and replacement bracket. Background Technology

[0002] As a key component of lifting equipment, hooks have a wide range of important applications in shipyards and large equipment manufacturing sites. In shipyard environments, the lifting and positioning of heavy components, hull sections, and large mechanical equipment are often involved, and the performance of hooks directly affects operational efficiency and safety.

[0003] Traditional lifting hooks typically possess high load-bearing capacity and structural strength to meet the basic requirements for lifting large objects. Due to the complex working environment of docks, lifting hooks often need to have a certain degree of adaptability to maintain stable operation under different lifting heights, spans, and object sizes. Therefore, lifting hooks not only serve as the terminal execution component of lifting machinery but also play an important role in mechanical transmission and safety assurance in actual operations. The rationality of their design has a significant impact on the reliability and economy of the overall lifting system.

[0004] Currently, most heavy-duty lifting hooks on the market adopt an integrated structure design, with the boom and frame usually cast as a single piece. Although this type of structure performs well in terms of initial strength, it also exposes many limitations in actual use. On the one hand, since the boom length is fixed, different working conditions often require the use of various specifications of hooks, resulting in a large amount of equipment redundancy, occupying a lot of storage space, and wasting resources. On the other hand, once the boom is worn, deformed, or damaged, the entire hook assembly must be disassembled from the lifting equipment and sent for repair. The replacement process is time-consuming and labor-intensive, seriously affecting the continuity of operations. This problem is particularly prominent in shipyards and assembly sites with strict time requirements.

[0005] In addition, integral hooks are heavy and require large auxiliary equipment, such as additional cranes or hydraulic handling equipment, for handling and disassembly. This not only increases the complexity of the operation but also brings higher maintenance costs and safety risks. There is a heavy-duty forged hook in the existing technology, which has improved in terms of structural strength, but still does not solve the problem of difficult boom replacement. In general, traditional hooks have obvious shortcomings in terms of applicability and modularity. In particular, the boom does not have the ability to be quickly replaced, which limits the overall efficiency of the hook system. Therefore, there is an urgent need for a hook device with a reasonable structure, easy boom replacement and adaptability to various working conditions to improve the flexibility and economy of lifting operations. Utility Model Content

[0006] In view of the shortcomings of existing hook systems in terms of modularity, adaptability and ease of maintenance pointed out in the background art, this utility model proposes a modular hook system with a quick boom replacement function. It aims to effectively solve the technical bottlenecks such as non-adjustable boom length and complex replacement process. Through structural innovation and the coordinated work of supporting auxiliary devices, it realizes the quick and safe replacement of the boom. Specifically, it is a C-type hook for replacing boom length and its replacement bracket, which includes a C-type hook body, a replacement bracket and a special boom transport vehicle, together forming a complete boom replacement system.

[0007] The C-type hook mainly consists of a hanger and various booms of different lengths, such as the first type boom and the second type boom, which can be flexibly selected according to actual lifting needs.

[0008] The hanger, as the main load-bearing structure, consists of a horizontal part and a vertical part. The horizontal part has a lifting hole for connecting the lifting equipment and bearing the main lifting load. The vertical part extends downward and has two key channels inside: one is a horizontally pendant channel and the other is a vertically downward-opening tenon channel. These two channels are the core structure that enables the replaceable function of the boom.

[0009] The upper end of the boom is equipped with a tenon, the size of which is precisely matched with the tenon channel in the hanger. Through the tenon and mortise connection, the boom can achieve initial positioning and effectively transfer force. To further enhance the reliability and shear resistance of the connection, the tenon itself is also equipped with a horizontal through-hole for the pin. When the boom tenon is inserted into the tenon channel of the hanger, the pin channels of the two will be coaxially aligned. At this time, bolt pins can be inserted for secondary mechanical tightening, thereby forming a connection system with stronger tensile and torsional resistance. To prevent the bolt pins from loosening under vibration conditions, a pin hole is also provided at its end, which can be used with a cotter pin to achieve anti-loosening fixation.

[0010] The replacement support is an important auxiliary device in the process of replacing the boom. It consists of a pair of synchronously controllable lifting robotic arms. These robotic arms can be of the type of hydraulic cylinder, electric push rod or screw jack. The top of the robotic arms is used to support the horizontal part of the boom. By precisely controlling the lifting movement, the height of the boom can be adjusted so that the tenon of the boom can be smoothly connected or separated from the boom, which greatly reduces the difficulty and labor intensity of manual operation.

[0011] The crane transport vehicle is used for storing and transporting crane booms. Its upper surface is equipped with load-bearing grooves that match the shape of the crane boom, which can safely accommodate different types of crane booms. To enhance stability during transportation, the transport vehicle is also equipped with high-strength, heavy-duty cable ties for securing the booms. The bottom of the vehicle is equipped with casters, which makes it easy for operators to transport the crane booms to the work position, effectively improving the mobility and operational efficiency of the replacement process.

[0012] Beneficial effects:

[0013] In summary, this utility model overcomes the technical obstacles of traditional hooks in boom replacement through modular and combined design. Its core advantage lies in decomposing the original integrated hook into interchangeable frames and booms of various specifications, supplemented by dedicated lifting supports and transport devices, forming a systematic rapid boom replacement solution. This design significantly improves the applicability and versatility of the hook equipment. The same frame can be adapted to booms of different lengths to meet diverse working conditions, greatly reducing equipment investment and storage space occupation. In terms of safety, the double insurance mechanism of tenon and mortise connection plus pin fastening effectively enhances structural reliability and avoids risks caused by connection failure during hoisting. Its technical contribution is mainly reflected in realizing rapid, safe, and economical boom replacement operations. This design is not only suitable for shipyards and large equipment manufacturing sites, but can also be extended to multiple industrial fields such as bridge construction and heavy machinery installation, with broad application prospects and significant technological advancements. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of a C-type hook for replacing boom length and a C-type hook for placing a replacement bracket;

[0015] Figure 2 This is an exploded view of a C-type hook for replacing the length of a crane boom and the C-type hook with a replacement bracket.

[0016] Figure 3 This is an exploded cross-sectional view of a C-type hook for replacing the length of a crane boom and the C-type hook with a replacement bracket.

[0017] Figure 4 This is a schematic diagram of a C-type hook for replacing the length of a boom and its replacement bracket.

[0018] Figure 5 This is a schematic diagram of a C-type hook for replacing the length of a boom and its placement of a replacement bracket for disassembling the boom.

[0019] Figure 6 This is a schematic diagram illustrating the replacement of a boom length using a C-type hook and its placement of a replacement bracket.

[0020] Figure 7 This is a schematic diagram of a C-type hook for replacing the boom length and a transport vehicle for placing the replacement bracket;

[0021] In the diagram, 1. C-type hook, 101. Hanger, 102. First-style boom, 103. Second-style boom, 104. Pin channel, 105. Bolt pin, 106. Tenon channel, 107. Tenon, 2. Placement replacement bracket, 201. Lifting mechanical arm, 3. Boom transport vehicle, 301. Boom bearing groove, 302. Heavy-duty cable tie. Detailed Implementation

[0022] To enhance understanding of this utility model, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. These embodiments are only used to explain the present utility model and do not constitute a limitation on the scope of protection of the present utility model.

[0023] C-type hook 1, hanger 101, first-style boom 102, second-style boom 103, pin channel 104, bolt pin 105, tenon channel 106, tenon 107, replacement bracket 2, lifting mechanical arm 201, boom carrier 3, boom bearing groove 301, heavy-duty cable tie 302.

[0024] like Figure 1 , 2 As shown in Figure 3, the C-type hook 1 mainly includes a hanger 101 and at least two different lengths of boom, referred to as the first-style boom 102 and the second-style boom 103. The hanger 101, as the main structure, is composed of a horizontal part and a vertical part. The horizontal part is provided with a lifting hole for connecting to the lifting rope or chain of the lifting equipment and bearing the main lifting force. The vertical part extends downward and has a horizontally pendant channel 104 and a vertically downward-opening tenon channel 106 inside. These two channels are the key structures for realizing the detachable and replaceable boom. The upper end of the boom is provided with a tenon 107. The geometry of the tenon 107 is the same as that of the tenon in the hanger 101. The channel 106 forms a precise fit, constituting a mortise and tenon connection structure to achieve initial centering and load transfer. To further enhance the reliability of the connection, the tenon 107 also has a horizontally penetrating pin channel 104 in the middle. When the tenon 107 of the boom is inserted into the tenon channel 106 of the hanger 101, the pin channel 104 on the hanger 101 and the pin channel 104 in the tenon 107 will be coaxially aligned. At this time, the operator can insert the bolt pin 105 from one side, passing through the two channels, thereby achieving secondary mechanical fastening. To prevent the bolt pin 105 from accidentally loosening during hoisting vibration, its exposed end is provided with a pin hole, into which a cotter pin can be inserted for final fixation.

[0025] like Figure 4 , 5As shown in Figure 6, a replacement bracket 2 is placed as an auxiliary device to stably support the hanger 101 during the replacement of the boom. The bracket mainly includes a pair of synchronously controllable lifting mechanical arms 201. The top of the mechanical arm is equipped with a lifting structure to support the horizontal part of the hanger 101 from below. The lifting mechanical arms 201 can adopt common linear actuators such as hydraulic cylinders, electric push rods or screw jacks. Synchronous lifting is achieved through a unified control unit. Its function is to precisely adjust the height of the hanger 101 so that the tenon 107 of the boom can be smoothly inserted into or out of the tenon channel 106, reducing the difficulty and risk of manual operation.

[0026] like Figure 7 As shown, the boom carrier 3 is used for the storage and transfer of booms. Its upper surface is provided with a groove that matches the shape of the boom, called the boom bearing groove 301, which can stably accommodate booms of different specifications. In order to enhance the stability during transportation and prevent the boom from shifting, the carrier is also equipped with heavy-duty cable ties 302, which can be used to tie and fix the boom. The bottom of the vehicle is equipped with casters with braking function, which makes it easy for operators to move the boom flexibly at the work site.

[0027] In actual hoisting operations, a suitable boom can be selected according to the size, weight, and operating radius requirements of the object being hoisted. If the boom needs to be replaced, firstly, the C-type hook 1 is lowered as a whole, and the replacement bracket 2 lifts the horizontal part of the gantry 101 from below. Operate the lifting mechanical arm 201 to fine-tune the height of the gantry 101 so that the currently installed boom is in an unloaded state. Remove the cotter pin at the end of the bolt pin 105 and pull out the pin. Then continue to adjust the lifting mechanical arm 201 to slowly lower the boom until the tenon 107 is completely disengaged from the tenon channel 106. The boom transport vehicle 3 transports the old boom away and transports the new boom to directly below the gantry 101. Through the lifting action of the lifting mechanical arm 201, the tenon 107 of the new boom is gradually aligned and inserted into the tenon channel 106 of the gantry 101. After aligning the pin channel 104, the bolt pin 105 is inserted, and the cotter pin is installed to prevent loosening. After confirming that the connection is firm, the replacement bracket 2 is removed, and the hook can be put back into use.

[0028] This design, through the combination of modular booms and specialized auxiliary equipment, enables rapid and safe boom replacement, significantly improving the adaptability and economy of lifting equipment.

[0029] Implementation example:

[0030] The following uses the boom replacement operation as an example to illustrate the specific use and operation process of this utility model:

[0031] At a shipyard work site, the first type of crane boom 102 was originally installed on the gantry 101. However, because the work object has changed to a wider hull section, it needs to be replaced with the second type of crane boom 103.

[0032] The replacement procedure is as follows:

[0033] 1. Preparation

[0034] Push the boom carrier 3 to the work area, where the second-type boom 103 is already fixed. Confirm that the heavy-duty cable ties 302 are tightened and the casters are locked. Operate the crane to slowly lower the C-type hook 1 until the horizontal part of its frame 101 is stably supported by the two lifting mechanical arms 201 placed on the replacement bracket 2.

[0035] 2. Disassemble the original boom

[0036] The lifting robotic arm 201 is operated synchronously by the control system to slightly raise the hanger 101, so that the first-style boom 102 is slightly suspended in the air to relieve its stress. The operator uses tools to remove the cotter pin at the end of the bolt pin 105 and pulls the pin out of the pin channel 104. Then, the lifting robotic arm 201 is controlled to slowly descend, and the hanger 101 is lowered accordingly. The tenon 107 of the original boom gradually exits from the tenon channel 106 and is finally completely separated. The boom falls into the groove of the transport vehicle below, the binding is released, and the original boom is removed.

[0037] 3. Install the new boom

[0038] Push the transport vehicle loaded with the second-type boom 103 directly under the gantry 101, adjust the vehicle position so that the tenon 107 at the upper end of the boom is roughly aligned with the tenon channel 106 below the gantry 101, and control the lifting mechanical arm 201 to slowly descend, guiding the tenon 107 into the channel. Due to the self-aligning characteristics of the mortise and tenon structure, the boom can be gradually positioned. When the boom is fully installed, the gantry 101 and the pin channel 104 in the tenon 107 will automatically align.

[0039] 4. Fixing and Inspection

[0040] Insert the bolt pin 105 from one side, making it completely pass through the hanger 101 and the tenon 107. Install a cotter pin at the other end of the pin to prevent it from loosening. Check whether the connection is firm and not loose. After confirming that there is no problem, operate the lifting mechanical arm 201 to make the hanger 101 fully bear the weight on the arm. Remove and place the replacement bracket 2.

[0041] 5. The hook is put into use.

[0042] The crane lifts the load, and the entire C-type hook 1 returns to its working state. At this point, the boom has been replaced with the required length, and subsequent lifting operations can be carried out.

[0043] This example demonstrates how this invention achieves safe and efficient boom replacement in practical applications, fully showcasing the synergistic advantages of its modular design and supporting auxiliary equipment.

[0044] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A C-type hook with replaceable boom length and a placement support for replacing the boom length, characterized in that, include: C-type hook, replacement support bracket and boom transport vehicle; The C-type hook includes a hanger and at least two different types of booms, the booms including a first type of boom and a second type of boom; The hanger consists of a horizontal part and a vertical part. The horizontal part is equipped with a lifting part, and the vertical part extends downward. Inside the vertical part, there is a horizontally penetrating pin channel and a vertically downward-opening tenon channel. The upper connecting end of the boom is provided with a tenon post, the size of which matches the tenon post channel of the hanger to achieve a tenon-and-mortise connection; The tenon column is provided with a horizontal through-hole pin channel. When the tenon column of any of the booms is inserted into the tenon column channel of the hanger, the pin channel of the hanger is coaxially aligned with the pin channel of the tenon column and is fixed by inserting bolt pins to form a secondary fastening connection. The replacement support includes a pair of synchronously controlled lifting robotic arms, the top of which lifts the horizontal part of the hanger from below, and the height of the hanger is controlled by the lifting motion. The upper surface of the boom carrier is provided with a boom bearing groove that matches the shape of the boom, and the boom bearing groove holds the first type of boom or the second type of boom; The crane transport vehicle is also equipped with heavy-duty cable ties for securing the crane boom.

2. A C-hook with replaceable boom length according to claim 1, and its placement replacement bracket, characterized in that, The pin channel of the vertical part of the hanger is a through hole, and one end of the bolt pin is provided with a pin hole. When the bolt pin is inserted, a cotter pin is inserted into the pin hole to prevent loosening and fix it.

3. A C-hook with replaceable boom length and its placement of replacement bracket according to claim 1, characterized in that, The lifting robotic arm is one of a hydraulic cylinder, an electric push rod, or a screw jack.

4. A C-hook with replaceable boom length according to claim 1, and its placement replacement bracket, characterized in that, The crane transport vehicle is equipped with casters at the bottom of its body.

5. A C-hook with replaceable boom length according to claim 1, and its placement replacement bracket, characterized in that, The contact surface between the tenon of the boom and the tenon channel of the hanger is provided with a guide structure to assist alignment.

6. A C-hook with replaceable boom length according to claim 1, and its placement replacement bracket, characterized in that, The horizontal portion of the hanger is provided with a lifting hole.

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