A pin shaft structure convenient to disassemble

Abstract

This utility model discloses a pin structure that is easy to disassemble, including a threaded rod, a support body, a flange, and a target shaft. The flange is fixedly connected to one end of the target shaft by a bolt, and the flange has a threaded hole. The support body is fixedly connected to the lifting lug of the assembly machine by a bolt, and the support body has a through hole coaxial with the target shaft. This utility model has the following advantages: significantly improved efficiency: disassembly can be completed with a single rotation operation, reducing the time by more than 80% compared to traditional methods; non-destructive disassembly: axial tension is evenly applied to the target shaft, avoiding surface damage and deformation of the mating hole caused by hammering; high safety: no hammering or high-pressure operation is required, reducing the risk of personnel injury; strong tool versatility: by changing the flange and threaded rod, it can be adapted to pins of various diameters and lengths; good portability: the lightweight design of the components is suitable for field operations and high-altitude environments.

Description

Technical Field

[0001] This utility model relates to the field of tunnel construction technology, and in particular to a pin structure that is easy to disassemble. Background Technology

[0002] In the field of tunnel construction equipment, pin connections are a common connection method for components such as assembly machines. Traditional pins are integral structures, which are prone to corrosion under the high vibration and high load conditions of tunnel boring machines, requiring sledgehammers or hydraulic jacks to force them out during disassembly. This method has the following drawbacks:

[0003] Significant safety hazards: Manual hammering or hydraulic operation can easily cause tools to slip and parts to fly off, threatening the safety of operators;

[0004] Inefficient: It requires multiple people to work together, and a single disassembly can take several hours, which seriously affects the construction progress;

[0005] High risk of equipment damage: Forced disassembly can easily cause scratches on the pin surface and deformation of the mating hole, shortening the service life of the equipment;

[0006] Poor tool compatibility: The lack of specialized tools makes it difficult to adapt to the needs of different sized pins and working in confined spaces. Utility Model Content

[0007] In order to overcome the shortcomings of the prior art, this application proposes a pin structure that is easy to disassemble, thereby solving the problems existing in the prior art.

[0008] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0009] A detachable pin structure includes a threaded rod, a support body, a flange, and a target shaft. The flange is fixedly connected to one end of the target shaft by a bolt, and the flange has a threaded hole. The support body is fixedly connected to the lifting lug of an assembly machine by a bolt, and the support body has a through hole coaxial with the target shaft. The threaded rod passes through the through hole of the support body and engages with the threaded hole of the flange. One end of the threaded rod has a hexagonal nut. By rotating the hexagonal nut, the threaded rod generates an axial tensile force, causing the target shaft to disengage from the engaging hole.

[0010] As a further technical solution of this utility model: the flange and the target shaft are fixedly connected by at least four bolts.

[0011] As a further technical solution of this utility model: the support body and the lifting lug of the assembly machine are fixedly connected by at least four bolts.

[0012] As a further technical solution of this utility model: the threaded length between the threaded rod and the flange is not less than 1 / 2 of the threaded hole depth to ensure stable connection.

[0013] As a further technical solution of this utility model: the first bolt is an M16*30 bolt.

[0014] As a further technical solution of this utility model: the second bolt is an M16*30 bolt.

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

[0016] 1. Significantly improved efficiency: Disassembly can be completed with a single rotation, reducing the time required by more than 80% compared to traditional methods;

[0017] 2. Non-destructive disassembly: Axial tension is applied evenly to the target shaft, avoiding surface damage and deformation of mating holes caused by hammering;

[0018] 3. High safety: No hammering or high-pressure operation is required, reducing the risk of personal injury;

[0019] 4. High tool versatility: By changing the flange and threaded rod, it can be adapted to pins of various diameters and lengths;

[0020] 5. Good portability: The lightweight design of the components makes it suitable for field operations and high-altitude environments. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall pin structure;

[0022] Figure 2 This is a sectional view of the pin structure.

[0023] In the diagram: 1-threaded rod, 2-hexagonal nut, 3-support body, 4-flange, 5-target shaft, 6-assembly machine connecting lug, 7-bolt one, 8-bolt two. Detailed Implementation

[0024] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] Example 1, such as Figures 1-2 As shown, a pin structure that is easy to disassemble includes a threaded rod 1, a hexagonal nut 2, a support body 3, a flange 4, a target shaft 5, a connecting lug for the assembly machine 6, a bolt 1 7, and a bolt 2 8.

[0026] Flange 4 is connected and secured to the target shaft 5 using four bolts (7). Flange 4 can be quickly connected to the threaded rod 1 and the target shaft 5 via bolts and threaded connections. Bolt fixation allows for flexible assembly and disassembly, facilitating equipment maintenance or component replacement and significantly reducing downtime and maintenance costs.

[0027] The support body 3 is connected and fixed to the lifting lug 6 of the assembly machine using four bolts 28. This bolt-fixing allows for flexible assembly and disassembly, facilitating equipment maintenance or component replacement and significantly reducing downtime and maintenance costs.

[0028] The threaded rod 1 passes through the through hole in the support body and is fixed to the flange 4 via a threaded connection. The threaded rod 1 connects with the threaded hole in the support body 3 and the flange 4, forming a double-constraint stable support that effectively suppresses lateral and torsional sway, ensuring smooth operation. The threaded flange requires no welding and can be directly connected via threads, making it suitable for scenarios where on-site welding is not permitted.

[0029] Install the hexagonal nut 2 into the threaded rod 1 until the hexagonal nut 2 contacts the end face of the support body 3.

[0030] The hexagonal nut 2 is clamped to the threaded rod 1, and the rotational force is converted into axial tension through the threaded inclined surface. The axial tension is transmitted to the target shaft, and the target shaft is disengaged from the mating hole due to the axial tension.

[0031] The working principle is as follows:

[0032] Before disassembling the target shaft, the flange 4 needs to be manually connected and fixed to the target shaft 5 using bolt 7, and the bolts need to be tightened. Then, the support body 3 needs to be manually connected and fixed to the assembly machine lifting lug 6 using bolt 8, and the bolts need to be tightened. Next, the threaded rod 1 needs to be manually passed through the through hole of the support body 3 and connected to the flange 4 by thread. The threaded rod 1 should have at least half of its thread engagement with the threaded hole of the flange 4. Then, the hexagonal nut 2 needs to be manually installed on the threaded rod 1 and made to contact the end face of the support body 3. Then, the hexagonal nut 2 needs to be slowly and evenly turned with a torque wrench. The rotational force is converted into axial tension through the threaded bevel, and the axial tension is transmitted to the target shaft. The target shaft is disengaged from the mating hole due to the axial tension.

[0033] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

[0034] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment have been appropriately combined to form other embodiments that are easy for those skilled in the art to understand.

Claims

1. A pin structure for easy disassembly, comprising a threaded rod (1), a support body (3), a flange (4) and a target shaft (5), characterized in that: The flange (4) is fixedly connected to one end of the target shaft (5) by bolt one (7), and the flange (4) is provided with a threaded hole; the support body (3) is fixedly connected to the assembly machine lifting lug (6) by bolt two (8), and the support body (3) is provided with a through hole coaxial with the target shaft (5); the threaded rod (1) passes through the through hole of the support body (3) and is engaged with the threaded hole of the flange (4), and one end of the threaded rod (1) is provided with a hexagonal nut (2). By rotating the hexagonal nut (2), the threaded rod (1) generates an axial tensile force, which drives the target shaft (5) to disengage from the mating hole.

2. The pin structure of claim 1, wherein The flange (4) is fixedly connected to the target shaft (5) by at least four bolts (7).

3. The pin-and-socket structure of claim 1, wherein The support (3) is fixedly connected to the assembly machine lug (6) by at least four bolts (8).

4. The pin-and-socket structure of claim 1, wherein The threaded length between the threaded rod (1) and the flange (4) is not less than 1 / 2 of the threaded hole depth to ensure a stable connection.

5. The pin-and-socket structure of claim 1, wherein The bolt 1 (7) is an M16*30 bolt.

6. The pin-and-socket structure of claim 1, wherein Bolt 2 (8) is an M16*30 bolt.

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