Railway rescue crane jib hinge point pin shaft dismounting equipment

Abstract

The utility model discloses a railway rescue crane big arm hinge point pin shaft dismounting equipment, including cylinder, screw rod, coupling piece, hollow jack and limit nut, the screw rod is worn in the cylinder, and the one end of cylinder is fixed with flange plate, the one end of screw rod is connected with the pin shaft of dismounting through coupling piece, and the other end of screw rod passes through the center through -hole of hollow jack, when being in the dismounting working condition, the limit nut is sleeved and is connected on the screw rod with screw thread, and is located the one end of hollow jack away from the cylinder, when being in the installation working condition, still includes limit board and limit connecting piece, and the limit board is located the one end of hollow jack away from the cylinder, and is connected with the cylinder through limit connecting piece, and the limit nut is sleeved and is connected on the screw rod with screw thread, and is located the one end of hollow jack close to the cylinder. The utility model can reduce the component damage when pin shaft dismounting, promote the dismounting accuracy and efficiency, shorten the equipment downtime maintenance time and reduce the maintenance cost.

Description

Technical Field

[0001] This utility model relates to the technical field of mechanical assembly, and in particular to a disassembly and assembly device for the boom hinge pin of a railway rescue crane. Background Technology

[0002] The connection between the boom and other components of the railway rescue crane relies on the boom hinge pin. This pin plays a crucial role in transmitting lifting loads and ensuring the boom's rotational flexibility. Its disassembly and assembly are indispensable and important procedures in crane maintenance, fault repair, and core component replacement, directly affecting the crane's subsequent operational safety and stability.

[0003] However, currently, there is no specialized equipment in the industry for disassembling and assembling boom hinge pins. Traditional methods, such as manual hammering or using ordinary jacks with temporary support structures, are commonly employed. When hammering manually, operators struggle to precisely control the direction and force of the applied force, easily causing pin jamming, scratches on the inner wall of the boom pin hole, and deformation of the boom hinge lugs, affecting the subsequent pin fitting accuracy. While ordinary jacks can provide some pushing or pulling force, the lack of a fixed reference point adapted to the boom makes them prone to lateral deviation during force application, failing to ensure the applied force remains aligned with the pin axis, resulting in low disassembly and assembly efficiency. Furthermore, ordinary jacks lack matching positioning and adjustment components, resulting in no precise control over a single stroke. After each stroke, the support structure and jack position must be disassembled and adjusted again, repeatedly extending the disassembly and assembly cycle significantly.

[0004] The aforementioned traditional disassembly and assembly methods not only make it difficult to guarantee the quality of disassembly and assembly of the boom hinge pin, which can easily lead to subsequent crane operation failures, but also significantly extend the equipment downtime for maintenance and increase the overall maintenance cost. Therefore, it is urgent to design a special disassembly and assembly device for the boom hinge pin that can be adapted to the boom structure and achieve precise positioning and efficient disassembly and assembly, which has become an urgent need to solve the current technical pain points. Utility Model Content

[0005] To address the technical pain points of existing crane boom hinge pin disassembly and assembly methods that rely on manual hammering or ordinary jacks, resulting in easy component damage, low disassembly and assembly efficiency, long maintenance time, and high costs, this utility model provides a railway rescue crane boom hinge pin disassembly and assembly device that is adapted to the boom structure and enables precise positioning and efficient disassembly and assembly. This device ensures disassembly and assembly quality, shortens equipment downtime for maintenance, and reduces maintenance costs.

[0006] The technical solution adopted by this utility model to solve its technical problem is: a disassembly and assembly device for the boom hinge pin of a railway rescue crane, including a cylinder, a lead screw, a connecting piece, a hollow jack, and a limiting nut. The lead screw is coaxially and movably inserted into the cylinder. One end of the cylinder is fixed with a flange for connecting to the outer wall of the boom. The end of the lead screw near the flange is connected to the pin to be disassembled and assembled through the connecting piece. The other end of the lead screw passes through the cylinder and through the central through hole of the hollow jack.

[0007] When in the disassembly working state, the limiting nut is sleeved and threaded onto the lead screw, and is located at the end of the through-core jack away from the cylinder;

[0008] When in the installation working state, it also includes a limiting plate and a limiting connector. The limiting plate is located at the end of the hollow jack away from the cylinder and is connected to the cylinder through the limiting connector. The limiting nut is sleeved and threaded onto the lead screw and is located at the end of the hollow jack closer to the cylinder.

[0009] Furthermore, the limiting connector includes several screws and connecting nuts I. Several connecting nuts II are fixed on the outer wall of the end of the cylinder away from the flange. One end of the screw is threadedly connected to the connecting nut II, and the other end passes through the limiting plate. The end of the screw that passes through the limiting plate is threadedly connected to the connecting nut I.

[0010] Furthermore, the connecting component includes a sleeve and a stud coaxially fixed to one end of the sleeve. The sleeve is rotatably sleeved on the end of the lead screw, and the end of the pin shaft has a threaded hole adapted to the stud. The stud is threadedly connected to the pin shaft through the threaded hole.

[0011] The beneficial effects of this utility model are:

[0012] 1. This utility model of pin assembly and disassembly equipment uses a cylindrical flange to precisely fix the outer wall of the boom, ensuring that the lead screw and pin are coaxial; at the same time, it relies on a hollow jack to provide a stable axial force, avoiding lateral displacement, fundamentally reducing damage to the pin, boom pin hole and ear plate, ensuring the original precision of the components, and ensuring the subsequent pin assembly and stable operation of the crane.

[0013] 2. Compared to ordinary jacks that require repeated disassembly and adjustment of the support structure and their own position, with no precise control over a single stroke and a long disassembly and assembly cycle, this equipment, through the adjustable design of the limit nut, only requires adjusting the position of the limit nut after depressurizing the jack during disassembly and installation to repeatedly apply force, without the need for frequent disassembly and assembly of the support structure, significantly simplifying the operation steps and shortening the overall cycle of pin disassembly and assembly.

[0014] 3. This utility model of pin assembly and disassembly equipment uses the cylinder as the core support benchmark, and with the jack and limit nut abutment structure, it forms a stable force and positioning system. It can accurately control the movement stroke and direction of the pin driven by the screw, ensuring that the pin moves smoothly along the axis during the assembly and disassembly process, avoiding the fit error caused by the offset, and improving the accuracy of the assembly and disassembly operation. Attached Figure Description

[0015] Figure 1 This is a structural diagram of the present invention when disassembling the pin.

[0016] Figure 2 This is a top view of the structure of this utility model when the pin is disassembled.

[0017] Figure 3 This is a cross-sectional view of the structure of this utility model when the pin is first disassembled.

[0018] Figure 4 This is a structural schematic diagram of the connecting component in this utility model.

[0019] Figure 5 This is a structural diagram of the installation pin in this utility model.

[0020] Figure 6 This is a top view of the structure when the pin is installed in this utility model.

[0021] Figure 7 This is a sectional view of the structure of this utility model when the pin is initially installed.

[0022] In the diagram: 1. Cylinder; 11. Flange; 2. Screw; 3. Connecting component; 31. Sleeve; 32. Stud; 4. Hollow jack; 5. Limit nut; 6. Limit plate; 7. Limiting connector; 71. Screw; 72. Connecting nut I; 73. Connecting nut II; 8. Pin. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to the accompanying drawings.

[0024] This utility model discloses a disassembly and assembly device for the boom hinge pin of a railway rescue crane.

[0025] Reference Figures 1 to 7 A disassembly and assembly device for the boom hinge pin of a railway rescue crane includes a cylinder 1, a lead screw 2, a connecting piece 3, a hollow jack 4, and a positioning nut. The lead screw 2 is coaxially and movably installed inside the cylinder 1. One end of the cylinder 1 is fixed with a flange 11 for connecting to the outer wall of the boom. The end of the lead screw 2 near the flange 11 is connected to the pin 8 to be disassembled and assembled through the connecting piece 3. The other end of the lead screw 2 passes through the cylinder 1 and through the central through hole of the hollow jack 4.

[0026] When in the disassembly working state, the limit nut 5 is sleeved and threaded onto the lead screw 2, and is located at the end of the through-hole jack away from the cylinder 1;

[0027] When in the installation working state, it also includes a limiting plate 6 and a limiting connector 7. The limiting plate 6 is located at the end of the hollow jack 4 away from the cylinder 1 and is connected to the cylinder 1 through the limiting connector 7. The limiting nut 5 is sleeved and threadedly connected to the lead screw 2 and is located at the end of the hollow jack 4 close to the cylinder 1.

[0028] The limiting connector 7 includes several screws 71 and connecting nuts I 72. Several connecting nuts II 73 are fixed on the outer wall of the end of the cylinder 1 away from the flange 11. One end of the screw 71 is threadedly connected to the connecting nut II 73, and the other end passes through the limiting plate 6. The end of the screw 71 that passes through the limiting plate 6 is threadedly connected to the connecting nut I 72.

[0029] Reference Figure 4 The connecting component 3 includes a sleeve 31 and a stud 32 coaxially fixed to one end of the sleeve 31. The sleeve 31 is rotatably sleeved on the end of the lead screw 2. The end of the pin 8 is provided with a screw hole that is adapted to the stud 32. The stud 32 is threadedly connected to the pin 8 through the screw hole.

[0030] The working principle of this utility model of a disassembly and assembly device for the boom hinge pin of a railway rescue crane is as follows: When disassembling the pin 8, first connect the lead screw 2 to the pin 8 through the connecting piece 3, then fix the flange 11 on the cylinder 1 to the side wall of the boom with bolts, then install the hollow jack 4 so that the lead screw 2 passes through the central through hole of the hollow jack 4, then install the limit nut 5, rotate and adjust the position of the limit nut 5 on the lead screw 2 so that the limit nut 5 abuts against the outer wall of the end of the hollow jack 4 away from the cylinder 1, and then... Then, the hollow jack 4 is activated. Since both ends of the hollow jack 4 are in contact with the cylinder 1 and the limiting nut 5 respectively, the hollow jack 4 extends, thereby driving the limiting nut 5 to move away from the cylinder 1. The limiting nut 5 is also threadedly connected to the lead screw 2, which in turn drives the lead screw 2 to move, thereby pulling out the pin 8 a certain distance. Then, the pressure of the hollow jack 4 is released, causing it to retract. The position of the limiting nut 5 is readjusted so that the limiting nut 5 is in contact with the end face of the hollow jack 4. The above operation is repeated until the pin 8 is completely pulled out.

[0031] When installing the pin 8, first connect the lead screw 2 to the pin 8 using the connecting piece 3, and then fix the flange 11 on the cylinder 1 to the side wall of the boom using bolts. Next, install the limit nut 5, hollow jack 4, limit connector 7, and limit plate 6 in sequence. Then adjust the limit nut 5 so that it abuts against one end of the hollow jack 4 near the cylinder 1, and the other end of the hollow jack 4 abuts against the limit plate 6. Afterward, start the hollow jack 4. Because both ends of the hollow jack 4... The hollow jack 4 extends and drives the limit nut 5 to move closer to the cylinder 1, respectively, abutting against the limit plate 6 and the limit nut 5. The limit nut 5 is threadedly connected to the lead screw 2, which in turn drives the lead screw 2 to move closer to the boom, thereby inserting the pin 8 into the boom a certain distance. Then, the pressure of the hollow jack 4 is released, causing it to retract. The position of the limit nut 5 is readjusted so that the limit nut 5 abuts against the end face of the hollow jack 4 near the cylinder 1. The above operation is repeated until the pin 8 is fully inserted.

[0032] It should be noted that the pin assembly and disassembly equipment of this utility model is mainly used for the assembly and disassembly of the hinge pin of the crane boom; however, the structural adaptability and working logic of this equipment are not limited to the assembly and disassembly of crane pins. For other mechanical equipment with similar pin connection structures that require precise assembly and disassembly through stable axial force, such as the pins of other heavy machinery and special equipment in the engineering field, this pin assembly and disassembly equipment can be used to complete the assembly and disassembly operations, provided that its components can be adapted and fixed with the flange of the equipment and the pin can be adapted and connected with the connecting parts.

[0033] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A device for disassembling and assembling the hinge pin of a railway rescue crane boom, characterized in that: The assembly includes a cylinder (1), a lead screw (2), a connecting piece (3), a hollow jack (4), and a limiting nut (5). The lead screw (2) is coaxially and movably installed inside the cylinder (1). One end of the cylinder (1) is fixed with a flange (11) for connecting to the outer wall of the boom. The end of the lead screw (2) near the flange (11) is connected to the pin (8) to be disassembled via the connecting piece (3). The other end of the lead screw (2) passes through the cylinder (1) and through the central through hole of the hollow jack (4). When in the disassembly working state, the limiting nut (5) is sleeved and threaded onto the lead screw (2), and is located at the end of the through-core jack away from the cylinder (1); When in the installation working state, it also includes a limiting plate (6) and a limiting connector (7). The limiting plate (6) is located at the end of the hollow jack (4) away from the cylinder (1) and is connected to the cylinder (1) through the limiting connector (7). The limiting nut (5) is sleeved and threadedly connected to the lead screw (2) and is located at the end of the hollow jack close to the cylinder (1).

2. The disassembly and assembly equipment for the boom hinge pin of a railway rescue crane according to claim 1, characterized in that: The limiting connector (7) includes several screws (71) and connecting nuts I (72). Several connecting nuts II (73) are fixed on the outer side wall of the end of the cylinder (1) away from the flange (11). One end of the screw (71) is threadedly connected to the connecting nut II (73), and the other end passes through the limiting plate (6). The end of the screw (71) that passes through the limiting plate (6) is threadedly connected to the connecting nut I (72).

3. The disassembly and assembly equipment for the boom hinge pin of a railway rescue crane according to claim 2, characterized in that: The connecting member (3) includes a sleeve (31) and a stud (32) coaxially fixed to one end of the sleeve (31). The sleeve (31) is rotatably sleeved on the end of the lead screw (2). The end of the pin (8) is provided with a screw hole that is adapted to the stud (32). The stud (32) is threadedly connected to the pin (8) through the screw hole.

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