Cold heading oil passing bolt

Abstract

The utility model discloses a cold heading oil-passing bolt, which relates to the technical field of bolts, and comprises a bolt body, the bolt body comprises a hexagonal head and a screw rod, and a screw is movably sleeved in the hexagonal head. The screw is separated from a round groove IV arranged on the screw rod in the rotating process, so that the limit is opened, and the bolt body is locked in the round groove IV; the hexagonal head is movably clamped with the screw rod through the two arc-shaped blocks fixed on the hexagonal head, the hexagonal head and the screw rod are fixed through the screw, the hexagonal head and the screw rod are designed to be separated, when a certain part of the hexagonal head and the screw rod is damaged, the hexagonal head and the screw rod can be independently replaced, the whole bolt body does not need to be replaced, and the maintenance cost is reduced; the mounting and dismounting processes of the bolt body can be better controlled through the separated design, only personnel with corresponding authority and skills can operate the bolt, and therefore safety accidents caused by misoperation or malicious dismounting are reduced.

Description

Technical Field

[0001] This utility model relates to the field of bolt technology, and in particular to a cold-forged oil-lubricated bolt. Background Technology

[0002] Cold-forged oil-lubricated bolts, as a commonly used and important mechanical connection component, play a key role in equipment assembly and mechanical structure connections in many fields. The cold-forging process involves plastically deforming metal materials at room temperature to manufacture bolts. This process gives bolts many advantages. The following technologies are typically used in the production of cold-forged oil-lubricated bolts:

[0003] 1. Cold heading technology: Select suitable materials and pre-treat them, design and manufacture high-precision molds, and control parameters such as upsetting ratio, deformation speed, and pressure;

[0004] 2. Oiling treatment technology: Select a suitable oil, apply it using methods such as soaking or spraying, and then cure it;

[0005] 3. Thread machining technology: cutting or thread rolling, followed by inspection with go / no-go gauges, etc.

[0006] 4. Heat treatment technology: Quenching improves hardness and strength, while tempering eliminates stress and improves toughness;

[0007] 5. Surface treatment technology: electroplating, phosphating, blackening, etc., to improve corrosion resistance and aesthetics, and control various parameters;

[0008] 6. Quality inspection technology: Use measuring tools, hardness testers, flaw detection equipment, and tensile testing machines to inspect dimensions, hardness, internal defects, and tensile strength.

[0009] Currently, manufacturers employ various equipment and methods to achieve high-quality production of cold-forged and oiled bolts. Some manufacturers use automated cold-forging machines, operated through advanced control systems, which include high-precision molds and stable feeding devices. Other manufacturers use integrated processing lines, tightly combining cold forging and oiling processes within the equipment, resulting in a more efficient production process and more stable product quality assurance. Some manufacturers have also launched flexibly adjustable cold-forging equipment equipped with replaceable mold components to adapt to the production needs of bolts of different specifications.

[0010] However, these common bolt applications still have some problems. For bolts that do not adopt a split design, if a defect occurs in a certain part during the manufacturing process, such as an irregular hexagonal shape of the head or a defective thread on the bolt, it is often difficult to repair or improve a single part due to the integral structure. This may require the entire bolt to be scrapped, which undoubtedly increases production costs. At the same time, bolts without self-tapping ends also have many drawbacks in practical applications. When bolts need to be installed on softer materials or thinner plates, drilling must be performed on the material first because there are no self-tapping ends. This process adds extra steps, making the installation steps cumbersome and reducing installation efficiency. This application proposes an innovative cold-forged oil-lubricated bolt, which adopts a split design and has the characteristic of being able to install self-tapping ends. It aims to effectively solve many inconveniences in existing bolt applications, improve the applicability of bolts in various application scenarios, increase installation efficiency, and reduce maintenance costs. Utility Model Content

[0011] (a) Technical problems to be solved

[0012] To address the shortcomings of existing technologies, this utility model provides a cold-forged oil-lubricated bolt, which solves the problems that during maintenance, if a part of the bolt is damaged, it is impossible to replace that part alone, and the entire bolt needs to be replaced. It also addresses the issues that for bolts without self-tapping ends, drilling is required when installing them onto soft materials or thin plates, which increases the number of steps, makes the installation process cumbersome, and reduces efficiency.

[0013] (II) Technical Solution

[0014] To achieve the above objectives, this utility model provides the following technical solution: a cold-forging oil-lubricated bolt, comprising a bolt body, the bolt body including a hexagonal head and a screw, a screw movably sleeved inside the hexagonal head, a self-tapping head provided on the lower surface of the screw, a cylinder fixedly connected to the upper surface of the self-tapping head, a threaded rod fixedly connected to the upper surface of the cylinder, a circular groove four and two arc-shaped grooves formed on the upper surface of the screw, the screw threadedly sleeved with the circular groove four, a threaded post threadedly sleeved inside the circular groove four, a hexagonal groove formed on the upper surface of the threaded post, a circular groove three formed on the lower surface of the screw, the circular groove three movably sleeved with the cylinder.

[0015] As a preferred embodiment of this utility model, two arc-shaped blocks are fixedly connected to the lower surface of the hexagonal head, and the two arc-shaped blocks are respectively movably engaged with two arc-shaped grooves.

[0016] As a preferred technical solution of this utility model, the inner wall of the circular groove is provided with a connecting hole, the connecting hole is connected to the circular groove, and the connecting hole is movably sleeved with the threaded rod.

[0017] As a preferred technical solution of this utility model, a circular groove is provided on the upper surface of the hexagonal head, and the circular groove is movably connected with the screw.

[0018] As a preferred technical solution of this utility model, a second circular groove is provided on the lower surface of the threaded column, and the second circular groove is threadedly connected to the threaded rod.

[0019] (III) Beneficial Effects

[0020] 1. The hexagonal head and screw are designed separately. When one part of them is damaged, it can be replaced separately without replacing the entire bolt body, which reduces maintenance costs. The separate design allows for better control of the installation and disassembly process of the bolt body. Only personnel with the appropriate authority and skills can operate it, thereby reducing safety accidents caused by misoperation or malicious disassembly.

[0021] 2. During the downward rotation of the threaded column, the second circular groove on it will be threaded into the threaded rod, and the two will be connected and fixed. At this time, the self-tapping head and the screw are in a fixed connection state. When the bolt body needs to be used as a self-tapping screw, the self-tapping head is installed. During the overall use, there is no need to perform drilling operations in advance, which greatly saves installation time. Especially in on-site construction or emergency situations, it can quickly complete the connection task and improve the practicality of the bolt body. Attached Figure Description

[0022] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0023] Figure 1 This is an overall structural diagram of the present invention;

[0024] Figure 2 This is a structural diagram of the self-tapping head in this utility model;

[0025] Figure 3 This is a structural diagram of the threaded column in this utility model;

[0026] Figure 4 This is a structural diagram of the screw in this utility model.

[0027] Legend: 1. Bolt body; 2. Hexagonal head; 3. Threaded rod; 4. Screw; 5. Self-tapping head; 6. Cylindrical rod; 7. Threaded rod; 8. Arc groove; 9. Arc block; 10. Threaded post; 11. Circular groove one; 12. Circular groove two; 13. Circular groove three; 14. Hexagonal groove; 15. Circular groove four; 16. Connecting hole. Detailed Implementation

[0028] This application provides a cold-forged oil-lubricated bolt, which effectively solves the problems of non-separable bolts that may need to be scrapped due to defects in certain parts during manufacturing, increasing costs, and bolts without self-tapping ends that require drilling when installed on soft materials or thin plates, increasing the process, making installation steps cumbersome, and reducing efficiency. This solution adopts a separable design and has the characteristic of being able to install self-tapping ends, aiming to effectively solve many inconveniences in existing bolt applications, improve the applicability of bolts in various application scenarios, increase installation efficiency, and reduce maintenance costs.

[0029] Example

[0030] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the overall concept of the embodiments of this application is as follows:

[0031] To address the problems existing in the prior art, this utility model provides a cold-forging oil-lubricated bolt, including a bolt body 1. The bolt body 1 includes a hexagonal head 2 and a screw 3. A screw 4 is movably sleeved inside the hexagonal head 2. A self-tapping head 5 is provided on the lower surface of the screw 3. A cylinder 6 is fixedly connected to the upper surface of the self-tapping head 5. A threaded rod 7 is fixedly connected to the upper surface of the cylinder 6. A circular groove 15 and two arc-shaped grooves 8 are formed on the upper surface of the screw 3. The screw 4 is threadedly sleeved with the circular groove 15. A threaded post 10 is threadedly sleeved inside the circular groove 15. A hexagonal groove 14 is formed on the upper surface of the threaded post 10. A circular groove 13 is formed on the lower surface of the screw 3. The circular groove 13 is movably sleeved with the cylinder 6. During use, the bolt body 1, when connected to an object... After setting, screw 4 is rotated and removed using a screwdriver. During rotation, screw 4 disengages from the circular groove 15 on the screw rod 3, opening the limit switch. At this point, hexagonal head 2 can be disassembled. Hexagonal head 2 is movably engaged with screw rod 3 by two arc-shaped blocks 9 fixed on it, and the two are fixed by screw 4. Hexagonal head 2 and screw rod 3 are designed to be separate. If one part of either is damaged, it can be replaced separately without replacing the entire bolt body 1, reducing maintenance costs. The separate design allows for better control of the installation and disassembly process of bolt body 1. Only personnel with the appropriate authority and skills can operate it, thereby reducing safety accidents caused by misoperation or malicious disassembly.

[0032] Two arc-shaped blocks 9 are fixedly connected to the lower surface of the hexagonal head 2. The two arc-shaped blocks 9 are respectively engaged with two arc-shaped grooves 8. A connecting hole 16 is opened on the inner wall of the circular groove 4 15. The connecting hole 16 communicates with the circular groove 3 13. The connecting hole 16 is movably sleeved with the threaded rod 7. During the installation process, the self-tapping head 5 and the cylindrical column 6 fixed on it are movably sleeved in the screw rod 3. At this time, the threaded rod 7 fixed on the cylindrical column 6 will extend into the circular groove 4 15. The threaded column 10 is installed into the circular groove 4 15 by using an Allen wrench. The threaded column 10 and the circular groove 4 15 are threadedly connected. During the downward rotation of the threaded column 10, the circular groove 2 12 opened on it will be threadedly sleeved with the threaded rod 7. The two are connected and fixed. At this time, the self-tapping head 5 and the screw rod 3 are in a fixed connection state.

[0033] The upper surface of the hexagonal head 2 has a circular groove 11, which is movably connected to the screw 4. The lower surface of the threaded post 10 has a circular groove 12, which is threadedly connected to the threaded rod 7. When the bolt body 1 needs to be used as a self-tapping screw, the self-tapping head 5 is installed. During the overall use, there is no need to perform drilling operations in advance, which greatly saves installation time. Especially in on-site construction or emergency situations, it can quickly complete the connection task and improve the practicality of the bolt body 1.

[0034] Working principle:

[0035] During use, after the bolt body 1 is connected and fixed to the object, the screw 4 is rotated and removed using a screwdriver. During rotation, the screw 4 disengages from the circular groove 15 on the screw rod 3, opening the limit switch. At this point, the hexagonal head 2 can be disassembled. The hexagonal head 2 is movably engaged with the screw rod 3 via two fixed arc-shaped blocks 9, and the two are fixed by the screw 4. The hexagonal head 2 and the screw rod 3 are designed to be separate; if one part is damaged, it can be replaced individually without replacing the entire bolt body 1, reducing maintenance costs. The separate design allows for better control of the installation and disassembly process of the bolt body 1, ensuring that only personnel with the appropriate permissions and skills can operate it, thereby reducing safety accidents caused by misoperation or malicious disassembly. During installation, the self-tapping head 5 and the cylinder 6 fixed thereon are movably fitted into the screw 3. At this time, the threaded rod 7 fixed on the cylinder 6 will extend into the circular groove 15. The threaded post 10 is installed into the circular groove 15 using an Allen wrench. The threaded post 10 and the circular groove 15 are threadedly connected. During the downward rotation of the threaded post 10, the circular groove 12 opened on it will be threadedly fitted with the threaded rod 7, and the two are connected and fixed. At this time, the self-tapping head 5 and the screw 3 are in a fixed connection state. When the bolt body 1 needs to be used as a self-tapping screw, the self-tapping head 5 is installed. During the overall use, there is no need to perform drilling operations in advance, which greatly saves installation time. Especially in on-site construction or emergency situations, it can quickly complete the connection task and improve the practicality of the bolt body 1.

[0036] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A cold-forged oil-lubricated bolt, comprising a bolt body (1), said bolt body (1) including a hexagonal head (2) and a threaded rod (3), characterized in that, A screw (4) is movably sleeved inside the hexagonal head (2), a self-tapping head (5) is provided on the lower surface of the screw (3), and a cylinder (6) is fixedly connected to the upper surface of the self-tapping head (5); Among them, the upper surface of the cylinder (6) is fixedly connected to a threaded rod (7), the upper surface of the screw (3) is provided with a circular groove four (15) and two arc grooves (8), the screw (4) is threadedly connected to the circular groove four (15), the inner thread of the circular groove four (15) is threadedly connected to a threaded column (10), and the upper surface of the threaded column (10) is provided with a hexagonal groove (14).

2. The cold-forged oil-lubricated bolt as described in claim 1, characterized in that: The lower surface of the screw (3) is provided with a circular groove (13); The circular groove (13) is movably connected to the cylinder (6).

3. The cold-forged oil-lubricated bolt as described in claim 1, characterized in that: Two arc-shaped blocks (9) are fixedly connected to the lower surface of the hexagonal head (2); The two arc-shaped blocks (9) are respectively engaged with the two arc-shaped grooves (8).

4. A cold-forged oil-lubricated bolt as described in claim 1, characterized in that: A connecting hole (16) is provided on the inner wall of the fourth circular groove (15), and the connecting hole (16) is connected to the third circular groove (13); The connecting hole (16) is movably sleeved with the threaded rod (7).

5. A cold-forged oil-lubricated bolt as described in claim 1, characterized in that: The upper surface of the hexagonal head (2) is provided with a circular groove (11); The circular groove (11) is movably connected to the screw (4).

6. A cold-forged oil-lubricated bolt as described in claim 1, characterized in that: The threaded column (10) has a circular groove (12) on its lower surface; The circular groove (12) is threadedly connected to the threaded rod (7).

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