A threaded, hexalobular metal pin connection

Abstract

The utility model provides a kind of thread, internal hexagonal metal pin connecting structure, including metal pin body, the middle part of metal pin body is equipped with thickening, the front end surface of the metal pin body is equipped with threaded hole, the rear end surface of metal pin body is equipped with hexagonal operating hole.It is based on the interference connection of the connecting hole on metal pin body and connecting portion when using, then the axial fixation of metal pin body is carried out by bolt, so that metal pin body and connecting portion connection are more stable and firm.

Description

Technical Field

[0001] This utility model relates to the field of hardware fastener technology, specifically to a threaded, internal hexagonal metal pin connection structure. Background Technology

[0002] refer to Figure 1 As shown, this is an existing metal pin connection structure.

[0003] It includes component 01 and metal pin body 05.

[0004] The component 01 is provided with a cylindrical connecting part 02, the connecting part 02 is provided with connecting holes 03 that pass through both ends of its axial direction, and the outer side wall of the connecting part 02 is provided with a slot 04 that passes through its inner and outer sides along its length direction.

[0005] The metal pin body 05 has a cylindrical structure, and a thickened part 06 is provided in the middle of the metal pin body 05.

[0006] In use, one end of the metal pin body 05 is inserted into the connecting hole 03 until the thickened part 06 abuts against the connecting part 02. Since the diameter of the metal pin body 05 is slightly larger than the diameter of the connecting hole 03, the connecting part 02 is forced to open and deform. The metal pin body 05 is clamped and fixed in the connecting part 02, and the other end of the metal pin body 05 is then connected to other components.

[0007] After the metal pin body 05 of the above structure is inserted into the connecting hole 03, it relies entirely on the connecting part 02 to clamp and fix the metal pin body 05, which results in a problem of unstable connection. Utility Model Content

[0008] In view of the problems pointed out in the background art, this utility model proposes a threaded, internal hexagonal metal pin connection structure to solve the above-mentioned technical problems.

[0009] The technical solution of this utility model is implemented as follows:

[0010] A threaded, internal hexagonal metal pin connection structure includes a metal pin body, a thickened portion in the middle of the metal pin body, a threaded hole on the front end face of the metal pin body, and a hexagonal operating hole on the rear end face of the metal pin body.

[0011] The present invention is further configured such that a circular recess is provided on the rear end face of the metal pin body, and a hexagonal operating hole is provided at the bottom of the recess.

[0012] The present invention is further configured such that the front end of the thickened portion is tapered.

[0013] The present invention is further configured such that an external thread is provided on the outer side wall of the rear end of the metal pin body.

[0014] The present invention is further configured to include a component, the component having a cylindrical connecting part, the connecting part having a connecting hole penetrating both ends of its axial direction, the outer wall of the connecting part having a slot penetrating both its inner and outer sides along its length direction, and the front end of the metal pin body being inserted into the connecting hole.

[0015] The present invention is further configured such that the diameter of the metal pin body is larger than the diameter of the connecting hole.

[0016] The present invention is further configured to include a bolt that extends into the connecting hole and is threadedly connected to the threaded hole, with the head of the bolt abutting against the connecting portion.

[0017] The present invention is further provided that the bolt is provided with a positioning part, the diameter of which is equal to the diameter of the connecting hole.

[0018] The present invention is further configured such that the connecting part and the component are welded and fixed.

[0019] The present invention is further configured such that the component is a plate-shaped structure.

[0020] By adopting the above technical solution, the beneficial effects of this utility model are as follows:

[0021] The threaded and internal hexagonal metal pin connection structure provided by this utility model, in use, on the basis of interference connection between the metal pin body and the connecting hole on the connecting part, the metal pin body is then axially fixed by bolts, so that the connection between the metal pin body and the connecting part is more stable and firm. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the existing technology.

[0024] Figure 2 This is a schematic diagram of the structure of the metal pin body of this utility model. Figure 1 .

[0025] Figure 3 This is a schematic diagram of the structure of the metal pin body of this utility model. Figure 2 .

[0026] Figure 4 This is a cross-sectional view of the metal pin body of this utility model.

[0027] Figure 5 This is a schematic diagram of the connection between the metal pin body and the connecting part of this utility model.

[0028] Figure 6 This is an exploded view of the connection between the metal pin body and the connecting part of this utility model.

[0029] Figure 7 This is a cross-sectional view of the connection between the metal pin body and the connecting part of this utility model.

[0030] The following are the labels in the attached drawings: Component 01, Connecting part 02, Connecting hole 03, Groove 04, Metal pin body 05, Thickened part 06, Threaded hole 1, Operating hole 2, Recessed hole 3, External thread 4, Bolt 5, Positioning part 6. Detailed Implementation

[0031] 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.

[0032] For reference as follows Figures 1-7 The present invention will be described as follows:

[0033] Example: A threaded, internal hexagonal metal pin connection structure includes a cylindrical metal pin body 05, a thickened portion 06 in the middle of the metal pin body 05, the thickened portion 06 being coaxial with the metal pin body 05, and the diameter of the thickened portion 06 being larger than the diameter of the metal pin body 05, forming a stepped structure.

[0034] The front end face (the end inserted into the connecting hole) of the metal pin body 05 is provided with a threaded hole 1 for mating with a bolt; the threaded hole 1 is arranged along the axial direction of the metal pin body 05. The rear end face (exposed end) of the metal pin body 05 has a hexagonal operating hole 2, which is also arranged along the axial direction of the metal pin body 05. The hexagonal operating hole 2 is adapted to an internal hex wrench, facilitating the installation and removal of the metal pin.

[0035] It also includes component 01, which has a cylindrical connecting part 02. The connecting part 02 has connecting holes 03 that pass through both ends of its axial direction. The outer wall of the connecting part 02 has a slot 04 that passes through both its inner and outer sides along its length. The slot 04 gives the connecting part 02 a certain elastic deformation capability, providing a structural basis for the interference fit of the metal pin body 05. The front end of the metal pin body 05 is inserted into the connecting hole 03.

[0036] The diameter of the metal pin body 05 is slightly larger than the diameter of the connecting hole 03. The two are interference fit; the bolt 5 and the metal pin body 05 are connected by threads, and the bolt 5 and the metal pin body 05 are located at the two ends of the axial direction of the connecting part 02, forming a tension fixing structure.

[0037] It also includes a bolt 5 that extends into the connecting hole 03 and is threadedly connected to the threaded hole 1. The bolt 5 serves as an auxiliary fastener. After the bolt 5 is tightened with the metal pin body 05, the head of the bolt 5 abuts against the connecting part 02 to form an axial limit.

[0038] During assembly, an Allen wrench is inserted into the operating hole 2 of the metal pin body 05, and torque is applied to press the front end of the metal pin body 05 into the connecting hole 03 of the connecting part 02. Since the diameter of the metal pin body 05 is larger than the connecting hole 03, the connecting part 02, after being compressed, undergoes elastic expansion deformation through the slot 04, using its rebound force to clamp and fix the metal pin body 05, forming preliminary radial fixation. When the metal pin body 05 is inserted until the thickened part 06 abuts against the end face of the connecting part 02, preliminary axial positioning is completed.

[0039] Insert the bolt 5 into the connecting hole 03 from the other end of the connecting part 02 (the side away from the metal pin body 05), and screw it into the threaded hole 1 at the front end of the metal pin body 05. Continue to tighten the bolt 5 until the head of the bolt 5 is tightly abutted against the end face of the connecting part 02. At this time, the bolt 5 and the metal pin body 05 form an axial tension, and the metal pin body 05 is further pressed into the connecting hole 03. The thickened part 06 and the bolt head together restrict the deformation and springback of the connecting part 02, achieving axial double fixation.

[0040] The existing structure relies solely on the elastic clamping force of the connecting part 02 for fixation. Under vibration, impact, or long-term load, the clamping force of the connecting part 02 is prone to fatigue deformation, leading to loosening of the metal pin. In this structure, the interference fit provides radial clamping force, while the axial tension of the bolt 5 counteracts the potential axial movement tendency of the metal pin. The two fixing methods work together to form a composite constraint of "radial + axial", significantly improving the reliability of the connection.

[0041] This structure does not add complex components; it achieves enhanced fixation based on the original interference fit only through the machining of threaded holes in the metal pin body and bolt mating. The process is simple and the cost is controllable. At the same time, the detachable nature of bolt 5 allows the connection structure to be reassembled, making it suitable for working conditions that require regular maintenance or adjustment.

[0042] This structure overcomes the limitations of traditional single interference fits through a combination design of "interference fit + bolt axial fixation". The interference fit ensures a tight radial fit, while the axial constraint of the bolt resists axial force. The two work together to form a stable mechanical balance, fundamentally solving the problem of weak connection between the metal pin and the connection part, and significantly improving the reliability of the structure under vibration, impact and long-term service environments.

[0043] The rear end face of the metal pin body 05 is provided with a circular recess 3, and the bottom of the recess 3 is provided with a hexagonal operating hole 2. A hexagonal wrench passes through the recess 3 and extends into the operating hole 2, increasing the connection and contact area between the operating hole 2 and the metal pin body 05.

[0044] The front end of the bolded part 06 is tapered.

[0045] The outer side wall at the rear end of the metal pin body 05 is provided with an external thread 4. This structure provides additional fixing methods and functional expandability for the connection system. When connected with other components, the external thread 4 can directly mate with a threaded connector to form a threaded connection pair, enhancing the connection strength between the metal pin and the external component. If axial positioning or anti-loosening is required, a nut can be used to mate with the external thread 4, and the preload of the nut can be used to further limit the axial movement of the metal pin.

[0046] The bolt 5 is provided with a positioning part 6, the diameter of which is equal to the diameter of the connecting hole 03. The positioning part 6 cooperates with the connecting hole 03 to position the bolt 5 and the connecting part 02, preventing the bolt 5 from moving freely within the connecting part 02.

[0047] The connecting part 02 and component 01 are welded together. Welding enables a rigid connection between the connecting part 02 and component 01.

[0048] Component 01 has a plate-like structure. The plate-like structure itself has a large planar contact area, which facilitates surface contact connection with other components.

[0049] 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 threaded, internal hexagonal metal pin connection structure, comprising a metal pin body, wherein a thickened portion is provided in the middle of the metal pin body, characterized in that: The metal pin body has a threaded hole on its front end face and a hexagonal operating hole on its rear end face.

2. The threaded, internal hexagonal metal pin connection structure according to claim 1, characterized in that: The metal pin body has a circular recess on its rear end face, and a hexagonal operating hole at the bottom of the recess.

3. The threaded, internal hexagonal metal pin connection structure according to claim 2, characterized in that: The front end of the thickened portion is tapered.

4. The threaded, internal hexagonal metal pin connection structure according to claim 2, characterized in that: The outer wall at the rear end of the metal pin body is provided with external threads.

5. A threaded, internal hexagonal metal pin connection structure according to any one of claims 1-4, characterized in that: It also includes components, each with a cylindrical connecting part, a connecting hole penetrating both ends of the connecting part, and a slot penetrating both the inner and outer sides of the outer side wall of the connecting part along its length direction, with the front end of the metal pin body inserted into the connecting hole.

6. The threaded, internal hexagonal metal pin connection structure according to claim 5, characterized in that: The diameter of the metal pin body is larger than the diameter of the connecting hole.

7. The threaded, internal hexagonal metal pin connection structure according to claim 5, characterized in that: It also includes bolts that extend into the connecting hole and are threadedly connected to the threaded hole, with the head of the bolt abutting against the connecting part.

8. The threaded, internal hexagonal metal pin connection structure according to claim 7, characterized in that: The bolt is provided with a positioning part, the diameter of which is equal to the diameter of the connecting hole.

9. A threaded, internal hexagonal metal pin connection structure according to claim 5, characterized in that: The connecting parts and components are welded and fixed.

10. A threaded, internal hexagonal metal pin connection structure according to claim 5, characterized in that: The components described are plate-shaped structures.

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