Special-shaped bolt structure

Abstract

The utility model relates to the technical field of fasteners, in particular to a special-shaped bolt structure which comprises a bolt head and a screw connected with the bolt head, and external threads are arranged on the screw. The bolt head comprises a screwing and clamping part, the screwing and clamping part is matched with an external disassembling tool to disassemble and assemble the bolt, the screwing and clamping part is of a triangular block structure, and a chip groove is formed in the screw rod in the length direction of the screw rod. According to the anti-theft bolt, the screwing and clamping part is the triangular block, so that the adaptability of tools during mounting and dismounting is ensured, a common dismounting tool cannot be in direct contact with the screwing and clamping part, the bolt can be dismounted only by a special tool, and the anti-theft effect of the bolt is enhanced; the chip groove effectively removes cuttings, threads are prevented from being blocked, the fastening quality during installation is ensured, and the clamping stagnation phenomenon is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to fastener technical field especially discloses a special-shaped bolt structure. BACKGROUND

[0002] With the complication of mechanical equipment, building structure and various facilities, as an important component of fastener, the bolt plays a vital role in various assembly and engineering application. The stability, durability and dismounting convenience of the bolt directly affect the safety and service life of the equipment. Therefore, the design and improvement of the bolt not only require good fastening effect, but also consider the reliability, maintenance convenience and anti-theft safety in long-term use.

[0003] The traditional bolt head design, such as hexagonal head, round head, etc., although can meet the basic requirements in most applications, but in some special engineering environment, they often have problems such as difficult dismounting, accumulation of cutting chips affecting use, easy to be dismounted by unauthorized person, etc. For example, in high load, vibration environment, the traditional bolt may be not fastened firmly due to accumulation of cutting chips, or the bolt is easy to be stolen or damaged due to the diversity and popularity of dismounting tools. SUMMARY

[0004] In order to overcome the shortcomings and deficiencies in the prior art, the purpose of the utility model is to provide a special-shaped bolt which is not easy to be stolen and prevents accumulation of cutting chips.

[0005] To achieve the above purpose, the utility model provides a special-shaped bolt structure, which comprises a bolt head and a screw rod connected with the bolt head, and an external thread is arranged on the screw rod; the bolt head comprises a clamping part, the clamping part cooperates with an external dismounting tool to dismount the bolt, the clamping part is a triangular block structure, and a chip removal groove is arranged on the screw rod along the length direction of the screw rod. The clamping part is provided as a triangular block in the utility model, which ensures the adaptability of the tool during installation and dismounting, so that the ordinary dismounting tool cannot directly contact the clamping part, only the special tool can dismount, and the anti-theft effect of the bolt is enhanced; the chip removal groove effectively removes cutting chips, avoids blocking of the thread, ensures the fastening quality during installation, and reduces the jamming phenomenon.

[0006] Further, the diameter of the inscribed circle of the clamping part is greater than the diameter of the screw rod. The diameter of the inscribed circle of the clamping part is greater than the diameter of the screw rod, which ensures that the dismounting tool can stably contact the bolt head, provides better stability and gripping force during dismounting, prevents the tool from slipping or poor contact, and thus improves the dismounting efficiency.

[0007] Further, the bolt head further comprises a connecting portion between the clamping portion and the screw rod, the connecting portion is tapered, the outer diameter of the connecting portion close to the clamping portion is larger than the outer diameter of the connecting portion close to the screw rod, the outer diameter of the connecting portion close to the screw rod is larger than or equal to the outer diameter of the screw rod, and the connecting portion is convexly formed from the clamping portion to the screw rod. The tapered connecting portion is arranged between the clamping portion and the screw rod to form an integrated structure, thereby enhancing the connection strength between the bolt head and the screw rod, preventing the connection part from being broken or loosened due to external force, improving the overall structural strength of the bolt, and prolonging the service life of the bolt.

[0008] Further, the chip removal groove is provided in multiple groups, and the multiple groups of chip removal grooves are arranged around the central axis of the screw rod. The multiple groups of chip removal grooves provide a larger cleaning space, avoid accumulation of cutting chips between threads, ensure smooth tightening of the bolt, reduce the risk of thread jamming, and improve installation efficiency and tightening effect of the bolt.

[0009] Further, the width of the chip removal groove gradually increases from the screw rod to the bolt head. The gradually increasing groove width can effectively prevent the cutting chips from being stuck in the groove, ensure smooth chip removal in the area near the bolt head, improve the cleaning effect during the tightening process of the bolt, and enhance the reliability of the overall connection.

[0010] Further, the end of the screw rod close to the bolt head is provided with a chip containing groove, the chip containing groove is communicated with the chip removal groove, and the chip containing groove is used for increasing the accommodation space of the chip removal groove. The chip containing groove increases the accommodation space of the chip removal groove, avoids accumulation of cutting chips near the threads, ensures smoothness of the chip removal groove, and enhances the use stability of the bolt, especially in the case of high load or long-term use.

[0011] Further, the side of the clamping portion away from the screw rod is provided with a limiting groove, and the limiting groove is used for enhancing the connection stability of the clamping portion and the external dismounting tool. The design of the limiting groove increases the contact stability between the tool and the clamping portion, prevents the tool from slipping or being unstable during operation, enhances the safety and efficiency during dismounting, and effectively improves the operation stability during the dismounting process.

[0012] Further, the bolt head and the screw rod are an integrated structure, and the edge of the clamping portion adopts a chamfered transition. The integrated design improves the overall structural strength of the bolt, avoids loosening or separation of the bolt head and the screw rod due to long-term use or external force, and ensures the stability and reliability of the bolt.

[0013] Further, the special-shaped bolt structure further comprises a nut, the nut comprises a body part, the body part is a hollow cylindrical structure, an inner thread matched with an outer thread is arranged on an inner wall of the body part, a stop part is arranged on one end of the body part close to the bolt head, the stop part is formed by protruding from an outer wall of the body part, and the nut is provided with anti-skid grooves, the anti-skid grooves are provided in multiple groups, and the multiple groups of anti-skid grooves are arranged around the body part. The design of the anti-skid grooves can increase the gripping force of the nut, prevent the nut from sliding or loosening during installation, ensure more stable connection, and prevent the bolt from failing due to loosening of the nut. The stop part can prevent the nut from being accidentally disassembled during use, and enhance the anti-theft property and safety.

[0014] Further, one end of the screw rod away from the bolt head is provided with a hemispherical tip. The hemispherical tip design can more conveniently insert and contact to accessories or devices, reduce the docking difficulty during installation, improve the connection precision of the bolt and accessories, and is particularly suitable for precise assembly or automatic assembly scenes.

[0015] The utility model discloses the beneficial effect: the utility model sets up and twists the clamping part for three prism, and the edge adopts the chamfer transition, ensures the adaptability of tool when installing and disassembling, makes ordinary disassembling tool unable direct contact twist clamping part, only special tool can disassemble, strengthens the anti-theft effect of bolt, and the chip removal groove effectively removes the chip, avoids the obstruction of thread, ensures the fastening quality when installing, reduces the jamming phenomenon. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 It is a structural schematic view of a special-shaped bolt structure of the utility model;

[0017] Fig. 2 It is a structural schematic view of a bolt head and a screw rod of the utility model;

[0018] Fig. 3 It is a structural schematic view of a bolt head of the utility model;

[0019] Fig. 4 It is a structural schematic view of a disassembling tool of the utility model.

[0020] The attached drawings comprise:

[0021] 1, bolt head;2, screw rod;3, twist clamping part;4, chip removal groove;5, connecting part;6, chip containing groove;7, limiting groove;8, nut;9, body part;10, stop part;11, tip;12, clamping head part;13, clamping column;14, clamping groove. DETAILED DESCRIPTION

[0022] In order to further illustrate the technical means and effects adopted by the utility model to achieve the predetermined utility model purposes, the following will be combined with the drawings and the preferred embodiments to specifically describe the specific implementation manners, structures, features and effects of the utility model.

[0023] Please refer to Figs. 1 to 4 As shown in the figure, the utility model discloses a special-shaped bolt structure, which comprises a bolt head 1 and a screw rod 2 connected with the bolt head 1, and the screw rod 2 is provided with external threads; the bolt head 1 comprises a clamping part 3, the clamping part 3 is matched with external dismounting tools to dismount the bolt, the clamping part 3 is a triangular block structure, and the screw rod 2 is provided with a chip removal groove 4 along the length direction of the screw rod 2. The clamping part 3 is provided with a triangular block in the utility model, so that the adaptability of the tool during installation and dismounting is ensured, the ordinary dismounting tool cannot directly contact the clamping part 3, only the special tool can dismount, and the anti-theft effect of the bolt is enhanced; the chip removal groove 4 effectively removes the cutting chips, avoids the obstruction of the threads, ensures the fastening quality during installation, and reduces the jamming phenomenon.

[0024] The diameter of the inscribed circle of the clamping part 3 is greater than the diameter of the screw rod 2. The diameter of the inscribed circle of the clamping part 3 is greater than the diameter of the screw rod 2, so that the dismounting tool can stably contact the bolt head 1 part, better stability and gripping force are provided during the dismounting process, the tool is prevented from slipping or being in poor contact, and therefore the dismounting efficiency is improved.

[0025] The bolt head 1 further comprises a connecting part 5 located between the clamping part 3 and the screw rod 2, the connecting part 5 is conical, the outer diameter of the connecting part 5 close to the clamping part 3 is greater than the outer diameter of the connecting part 5 close to one end of the screw rod 2, the outer diameter of the connecting part 5 close to one end of the screw rod 2 is greater than or equal to the outer diameter of the screw rod 2, and the connecting part 5 is convexly formed from the clamping part 3 to the screw rod 2. The conical connecting part 5 is arranged between the clamping part 3 and the screw rod 2, forming an integrated structure, the connecting strength between the bolt head 1 and the screw rod 2 is strengthened, the connecting part 5 is prevented from being broken or loosened due to external force, the overall structural strength of the bolt is improved, and the service life is prolonged.

[0026] The chip removal groove 4 is provided with multiple groups, and the multiple groups of chip removal grooves 4 are arranged around the central axis of the screw rod 2. The multiple groups of chip removal grooves 4 provide a larger cleaning space, avoid the accumulation of cutting chips between the threads, ensure the smooth tightening of the bolt, reduce the risk of thread jamming, and improve the installation efficiency and the fastening effect of the bolt.

[0027] The groove width of the chip removal groove 4 gradually increases from the screw rod 2 to the bolt head 1. The gradually increasing groove width can effectively prevent the cutting chips from being jammed in the groove, ensure the smooth chip removal in the vicinity of the bolt head 1, improve the cleaning effect during the tightening process of the bolt, and enhance the reliability of the overall connection.

[0028] The end of the screw rod 2 close to the bolt head 1 is provided with a chip groove 6, which is in communication with the chip groove 4, and is used to increase the accommodating space of the chip groove 4. The chip groove 6 increases the accommodating space of the chip groove 4, avoids the accumulation of chips near the thread, ensures the smoothness of the chip groove 4, and enhances the stability of the bolt, especially in the case of high load or long time use.

[0029] The side of the clamping part 3 away from the screw rod 2 is provided with a limiting groove 7, which is used to enhance the connection stability of the clamping part 3 and the external dismounting tool. The design of the limiting groove 7 increases the contact stability between the tool and the clamping part 3, prevents the tool from slipping or being unstable during operation, enhances the safety and efficiency during dismounting, and effectively improves the operation stability during dismounting.

[0030] The bolt head 1 and the screw rod 2 are of an integrated structure, and the edge of the clamping part 3 adopts a chamfered transition. The integrated design improves the overall structural strength of the bolt, avoids the loosening or separation of the bolt head 1 and the screw rod 2 due to long-term use or external force, and ensures the stability and reliability of the bolt.

[0031] The special-shaped bolt structure also includes a nut 8, which includes a body part 9, which is a hollow cylindrical structure. The inner wall of the body part 9 is provided with an internal thread matched with the external thread. The end of the body part 9 close to the bolt head 1 is provided with a stop part 10, which is formed protruding from the outer wall of the body part 9. The nut 8 is provided with anti-skid grooves, and the anti-skid grooves are provided in multiple groups and arranged around the body part 9. The design of the anti-skid grooves can increase the gripping force of the nut 8, prevent the nut 8 from sliding or loosening during installation, ensure more stable connection, and prevent the bolt from failing due to loosening of the nut 8. The stop part 10 can prevent the nut 8 from being accidentally dismounted during use, enhancing the security and safety.

[0032] Specifically, the cylindrical nut 8 is usually more compact than the hexagonal nut 8, and is suitable for use in space-limited situations. The hexagonal nut 8 requires more operating space to tighten or loosen, while the cylindrical nut 8, due to its symmetrical shape, can usually be installed in a smaller space, especially in scenarios that require tool or manual operation, where the round nut 8 has more advantages.

[0033] Specifically, the cylindrical nut 8 has no sharp edges, so the risk of injury to hands and equipment during installation or dismounting is smaller. In contrast, the six corners of the hexagonal nut 8 are more likely to scratch hands or other components.

[0034] The end of the screw rod 2 away from the bolt head 1 is provided with a hemispherical tip 11. The design of the hemispherical tip 11 can more conveniently insert and contact to the fittings or devices, reduce the difficulty of docking during installation, improve the connection accuracy of the bolt and the fittings, and is especially suitable for precision assembly or automated assembly scenarios.

[0035] Specifically, the bolt head 1 and the screw rod 2 are provided with a nano coating, which is used to reduce the adhesion of chips and sundries, help the chips to be removed more smoothly, and avoid blockage.

[0036] Preferably, the bolt head 1 and the screw rod 2 are detachably connected through threads, so that the bolt head 1 can be replaced for maintenance, and users can replace the bolt head 1 of different types or materials according to needs to adapt to different installation environments or working conditions.

[0037] Specifically, the bolt head 1 and the screw rod 2 are provided with a corrosion-resistant coating, such as electroplating, heat treatment, and spraying, which can greatly prolong the service life of the bolt when used in marine environments or chemical corrosion environments.

[0038] Specifically, the dismounting tool includes a clamping head 12 and a clamping column 13, the clamping column 13 is provided with a clamping groove 14 matched with the shape of the clamping part 3 of the bolt head 1, and the bottom of the clamping groove 14 is provided with a limiting protrusion matched with the limiting groove 7.

[0039] Specifically, the clamping head 12 is a hexagonal prism structure, and the hexagonal design allows it to be tightened and loosened using standard tools such as wrenches and pliers. Since these tools are commonly available, the clamping head 12 with a hexagonal prism structure is very convenient to use, and does not require special tools or equipment.

[0040] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the above disclosed technical content to obtain equivalent embodiments with equivalent changes, without departing from the technical solution of the present application. Any modification, equivalent change and modification of the above embodiments made in accordance with the technical essence of the present application shall still fall within the scope of the technical solution of the present application.

Claims

1. A special-shaped bolt structure comprising a bolt head (1) and a bolt shank (2) connected with the bolt head (1), the bolt shank (2) being provided with external threads; characterized in that: The bolt head (1) comprises a wrenching part (3) which cooperates with an external dismounting tool to dismount the bolt, the wrenching part (3) is a triangular block structure, and a chip removal groove (4) is arranged on the screw rod (2) along the length direction of the screw rod (2).

2. The profiled bolt structure of claim 1, wherein: The diameter of the incircle of the wrenching part (3) is greater than the diameter of the screw rod (2).

3. The profiled bolt structure of claim 1, wherein: The bolt head (1) further comprises a connecting part (5) between the wrenching part (3) and the screw rod (2), the connecting part (5) is conical, the outer diameter of the connecting part (5) close to the wrenching part (3) is greater than the outer diameter of the connecting part (5) close to one end of the screw rod (2), the outer diameter of the connecting part (5) close to one end of the screw rod (2) is greater than or equal to the outer diameter of the screw rod (2), and the connecting part (5) is convexly formed from the wrenching part (3) to the screw rod (2).

4. The profiled bolt structure of claim 1, wherein: The chip removal groove (4) is provided with multiple groups, and the multiple groups of chip removal grooves (4) are arranged around the central axis of the screw rod (2).

5. The profiled bolt structure of claim 1, wherein: The groove width of the chip removal groove (4) gradually increases from the screw rod (2) to the bolt head (1).

6. The profiled bolt structure of claim 1, wherein: The end of the screw rod (2) close to the bolt head (1) is provided with a chip receiving groove (6), the chip receiving groove (6) is in communication with the chip removal groove (4), and the chip receiving groove (6) is used to increase the accommodation space of the chip removal groove (4).

7. The profiled bolt structure of claim 1, wherein: The side of the wrenching part (3) away from the screw rod (2) is provided with a limiting groove (7), and the limiting groove (7) is used to enhance the connection stability of the wrenching part (3) and the external dismounting tool.

8. The profiled bolt structure of claim 1, wherein: The bolt head (1) and the screw rod (2) are an integral structure, and the edges of the wrenching part (3) adopt chamfered transitions.

9. The profiled bolt structure of claim 1, wherein: The special-shaped bolt structure further comprises a nut (8), the nut (8) comprises a body part (9), the body part (9) is a hollow cylindrical structure, an inner thread matched with an outer thread is arranged on the inner wall of the body part (9), a stop part (10) is arranged on one end of the body part (9) close to the bolt head (1), the stop part (10) is convexly formed from the outer wall of the body part (9), and the nut (8) is provided with anti-skid grooves, the anti-skid grooves are provided with multiple groups, and the multiple groups of anti-skid grooves are arranged around the body part (9).

10. The profiled bolt structure of claim 1, wherein: The end of the screw rod (2) away from the bolt head (1) is provided with a hemispherical tip (11).

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