CN111237312A - Self-locking bolt and manufacturing method thereof - Google Patents

Abstract

The invention provides a self-locking bolt applied in the technical field of fasteners. The self-locking bolt comprises a bolt body (1), a threaded portion (2) is arranged on the bolt body (1), and the threaded portion (2) consists of multiple Each thread (3) includes the top of the thread (4), the left side of the thread (5) and the right side of the thread (6). The tooth top (4) is provided with a plane portion (7), and the joint portion of the plane portion (7) and the left side surface (5) of the thread is provided with a left bulge (8), and the plane portion (7) is connected to the right side of the thread. The right bulging portion (9) is arranged at the joint portion of the side surface (6). The self-locking bolt of the present invention has simple structure, low cost and simple processing. When the bolt is subjected to vibration or rotational force, it realizes the self-locking function, which effectively improves the connection reliability and the overall safety of the equipment.

Description

Self-locking bolt and method of making the same

technical field

The invention belongs to the technical field of fasteners, and more particularly, relates to a self-locking bolt, and also relates to a method for making a self-locking bolt.

Background technique

Automotive fastener bolts are a product that is widely used. When using vehicle fastener bolts, due to the harsh environment in some workplaces, the bolts will be loosened after a period of use due to vibration or rotational force, which will affect normal use and even cause equipment damage. There are serious risks.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is: aiming at the shortcomings of the prior art, a simple structure is provided, which can realize the anti-loosening function after the bolt is connected with the connecting part, and realize the self-locking function when the bolt is subjected to vibration or rotational force. , Self-locking bolts that effectively improve the connection reliability and improve the overall safety of the equipment.

To solve the above-mentioned technical problems, the technical solution adopted by the present invention is:

The present invention is a self-locking bolt, the self-locking bolt comprises a bolt body, a threaded portion is arranged on the bolt body, the threaded portion is composed of multiple threads, and each thread includes a top of the thread, a left side of the thread and a thread portion. On the right side of the thread, the top of each thread is provided with a plane portion, the joint portion of the plane portion and the left side of the thread is provided with a left bulge, and the joint portion of the plane portion and the right side of the thread is provided Right bulge.

The flat part, the left bulging part, and the right bulging part form a self-locking part, the left side of the screw teeth and the right side of the screw teeth are in an inverted V-shaped structure, and each screw tooth is along the circumference of the screw according to the gap. A plurality of flat parts are provided, each joint part of the flat part and the left side of the screw thread is provided with a left bulge part, and each joint part of the flat part and the right side of the screw tooth is provided with a right bulge part.

The threaded portion is provided with multiple self-locking surfaces, and the multiple self-locking portions located on the same plane on the threaded portion form a self-locking surface, and each self-locking surface is respectively arranged in parallel with the centerline of the bolt body.

The threaded portion is provided with multiple self-locking surfaces along the circumference of the threaded portion, and a self-locking surface center surface is formed between the center line of the self-locking surface of each self-locking surface and the center line of the bolt body, and the self-locking surface of each self-locking surface is The angle between the center surface of the surface and the center surface of an adjacent self-locking surface is an equal angle structure.

The self-locking surface on the threaded portion of the self-locking bolt is set to a structure formed by applying pressure from a press-fitting component.

The present invention also relates to a method for manufacturing a self-locking bolt. The manufacturing steps of the method for manufacturing a self-locking bolt are as follows: 1) controlling the lowering of the press-fitting component, moving it toward the direction of the bolt body, and applying pressure through the press-fitting component on the screw of the bolt body. On the thread, the top of the screw thread is deformed under pressure, one side of the top of the thread bulges toward the left side of the thread, forming a left bulge, and the other side of the top of the thread bulges toward the right side of the thread, forming a right side. The bulging part, the top of the screw teeth forms a flat part, so as to form a self-locking part at a position of the screw teeth; 2) Raise the press-fitting part, loosen the bolt body, turn the bolt body, and apply pressure through the press-fitting part on the screw. Another position of the tooth is formed to form another self-locking part at another position of the screw tooth to complete the pressing and production of the self-locking bolt; 3) Repeat the above steps to complete the production of the self-locking bolt in batches.

Apply pressure through the press-fitting part before the thread part of the bolt body, clamp the bolt head of the bolt body through the positioning part, position the end of the bolt shank of the bolt body through the positioning part, fix the bolt body, and then press The mounting part exerts pressure on the thread part.

When pressure is applied to the threaded part of the bolt body by the press-fitting part, when the press-fitting part applies pressure to the threaded part at one time, it will act on multiple threads at the same time, thereby forming a self-locking surface on the threaded part.

Adopting the technical scheme of the present invention, the following beneficial effects can be obtained:

For the self-locking bolt of the present invention, when designing or manufacturing a bolt of a fastener for a vehicle, after processing a helical threaded portion on the bolt body, the press-fitting part is controlled to descend, move to the direction of the bolt body, and press-fit The component exerts pressure on the thread of the bolt body, the top of the thread is compressed and deformed, and one side of the top of the thread bulges toward the left side of the thread to form a left bulge, and the other side of the top of the thread is toward the thread The right side bulges to form a right bulge, and the top of the screw thread forms a flat part, so as to form a self-locking part at one position of the screw thread, and the press-fit part will process the self-locking part on multiple threads at the same time. part to form a self-locking surface. With such a structure, when the thread of the bolt is connected with the thread of the supporting component or equipment, an interference fit is formed between the thread, so as to exert a locking force on the thread, so that the bolt realizes the self-locking function and retracts It will not loosen when it comes to rotational force or vibration force, ensuring the reliability of the bolted connection, so that the safety and reliability of the equipment using bolts are comprehensively improved. The self-locking bolt of the present invention has the advantages of simple structure, low cost and simple processing. After the bolt is connected with the connecting part, the anti-loosening function can be realized, and the self-locking function can be realized when the bolt is subjected to vibration or rotational force, thereby effectively improving the connection. reliability and improve the overall safety of the equipment.

Description of drawings

Below is a brief description of the contents expressed in the drawings of this specification and the symbols in the drawings:

Fig. 1 is the sectional structure schematic diagram of the self-locking bolt of the present invention;

Fig. 2 is the sectional structure schematic diagram of the A-A surface of the self-locking bolt described in Fig. 1;

The symbols in the drawings are: 1. Bolt body; 2. Thread part; 3. Thread; 4. Top of thread; 5. Left side of thread; 6. Right side of thread; 7. Flat surface; 8 , left bulge; 9, right bulge; 10, self-locking part; 11, self-locking surface; 12, bolt body center line; 13, self-locking surface center line; 14, self-locking surface center surface; 15, Bolt head; 16. Bolt thread end.

Detailed ways

In the following, referring to the accompanying drawings, through the description of the embodiments, the specific embodiments of the present invention, such as the shape and structure of each component involved, the mutual position and connection relationship between each part, the function and working principle of each part, etc. will be further described. Details of:

As shown in Figure 1 and Figure 2, the present invention is a self-locking bolt, the self-locking bolt comprises a bolt body 1, a threaded portion 2 is arranged on the bolt body 1, and the threaded portion 2 is composed of multiple threads 3 , each thread 3 includes the top 4 of the thread, the left side 5 of the thread and the right side 6 of the thread, and the top 4 of the thread 3 of each thread 3 is provided with a plane portion 7, and the plane portion 7 and the thread are The joint portion of the left side surface 5 is provided with a left bulging portion 8 , and the joint portion of the flat portion 7 and the right side surface 6 of the screw thread is provided with a right bulging portion 9 . With the above structure, when designing or manufacturing a bolt of a vehicle fastener, after processing a helical threaded portion on the bolt body, the press-fitting part is controlled to descend and move in the direction of the bolt body 1, and the press-fitting part applies pressure to the bolt. On the thread 3 of the main body 1, the top 4 of the thread 3 is deformed under pressure, and one side of the top 4 of the thread is bulged in the direction of the left side 5 of the thread, forming a left bulging part 8, and the end of the thread 4 is the other side. The right side 6 of the lateral thread bulges to form a right bulging part 9, and the top of the thread end 4 forms a flat part 7, so as to form a self-locking part 10 at a position of the thread 4, and the press-fit parts will simultaneously Self-locking parts are simultaneously machined on a plurality of threads, a plurality of self-locking parts form a self-locking surface, and the bolt body is provided with many self-locking surfaces along the circumference of the bolt body. In this way, when the thread of the bolt is connected with the thread of the supporting component or equipment, an interference fit is formed between the thread, so as to exert a locking force on the thread, so that the bolt realizes the self-locking function and receives the rotation. It will not loosen under power or vibration force, ensuring the reliability of bolted connections, and improving the safety and reliability of equipment using bolts. The self-locking bolt of the present invention can realize the anti-loosening function after the bolt is connected with the connecting component or equipment, and realize the self-locking function when the bolt is subjected to vibration or rotational force, thereby effectively improving the connection reliability and the overall safety of the equipment. sex.

The flat part 7, the left bulging part 8, and the right bulging part 9 form a self-locking part 10, and the left side surface 5 of the screw teeth and the right side surface 6 of the screw teeth are in an inverted V-shaped structure in cross section. 3. A plurality of flat parts 7 are arranged according to the clearance along the screw teeth 3, and a left bulging part 8 is provided at the joint part of each flat part 7 and the left side surface 5 of the screw teeth, and each flat part 7 and the right side surface 6 of the screw teeth are provided A right bulging part 9 is set at the junction of the . The above-mentioned structure, the left side 5 of a thread and the right side 6 of the thread adjacent to another thread are that the cross-section is an inverted V-shaped structure, and each thread forms a drum after the press-fitting part exerts force. The left bulge and the right bulge are raised. After the bolts are screwed with the equipment or components for screwing the bolts, the left bulging part and the right bulging part exert force on the threads of the equipment or parts for screwing the bolts, so as to achieve an interference fit between the two. It can effectively prevent loose rotation.

The threaded portion 2 is provided with multiple self-locking surfaces 11, and the multiple self-locking portions 10 located on the same plane on the threaded portion 2 form a self-locking surface 11, and each self-locking surface 11 is respectively parallel to the centerline 12 of the bolt body. layout. With the above structure, one or more self-locking surfaces can be processed according to the performance requirements of the bolts used. When a plurality of self-locking surfaces are provided, the plurality of self-locking surfaces are arranged around the bolt body with gaps, and the plurality of self-locking surfaces are evenly arranged around the bolt body to improve the self-locking performance.

The threaded portion 2 is provided with multiple self-locking surfaces 11 along the circumference of the threaded portion 2, and a self-locking surface center surface 14 is formed between the self-locking surface centerline 13 of each self-locking surface 11 and the bolt body centerline 12. The angle between the center surface 14 of the self-locking surface 11 and the center surface 14 of the adjacent self-locking surface is an equal angle structure.

The self-locking surface 11 on the threaded portion 2 of the self-locking bolt is set as a structure formed by applying pressure from a press-fitting component. The above structure makes the processing of the self-locking surface convenient and fast, and does not increase the cost. It is safe and reliable as long as the strength and the deformation size of the top 4 of the thread 3 and the thread are controlled during processing.

The invention also relates to a method with simple steps and low cost, which can realize the anti-loosening function after the bolt is connected with the equipment or connecting parts matched with the bolt, realize the self-locking function when the bolt is subjected to vibration or rotational force, and effectively improve the connection. A method for making self-locking bolts for reliability and improving the overall safety of equipment or components.

The manufacturing steps of the self-locking bolt manufacturing method of the present invention are as follows: 1) the control part controls the press-fitting part to descend, moves in the direction of the bolt body 1, and applies pressure on the thread 3 of the bolt body 1 through the press-fitting part, and the thread 3. The top 4 of the thread is deformed under pressure, and one side of the top 4 of the thread bulges in the direction of the left side 5 of the thread to form a left bulging part 8, and the other side of the top 4 of the thread bulges toward the right side 6 of the thread, The right bulging part 9 is formed, and the top part of the screw thread 4 forms a flat part 7, so that a self-locking part 10 is formed at a position of the screw thread 4; 2) Raise the pressing part, loosen the bolt body 1, and rotate the bolt body 2 , applying pressure to another position of the screw teeth 3 by pressing the parts, forming another self-locking part 10 at another position of the screw teeth 3, and completing the pressing and manufacturing of the self-locking bolts; 3) Repeat the above steps to complete the self-locking bolts in batches. Fabrication of lock bolts.

In the method of the present invention, pressure is applied to the thread portion 2 of the bolt body 1 by the press-fitting component, the bolt head 15 of the bolt body 1 is clamped by the positioning component, and the screw thread end 16 of the bolt body 1 is positioned by the positioning component. , fix the bolt body 1, and then apply pressure on the thread part 2 through the press-fitting part. When applying pressure on the threaded portion 2 of the bolt body 1 by the press-fitting component, when the press-fitting component applies pressure on the threaded portion at one time, it will act on multiple threads 3 at the same time, forming a self-locking surface 11 on the threaded portion 2 .

For the self-locking bolt of the present invention, when designing or manufacturing a bolt of a fastener for a vehicle, after processing a helical threaded portion on the bolt body, the press-fitting part is controlled to descend, move to the direction of the bolt body, and press-fit The component exerts pressure on the threads of the bolt body, and the top of the threads is deformed under pressure. The surface is bulged to form a right bulge, and the top of the screw thread forms a flat surface, so that a self-locking part is formed at one position of the screw thread, and the press-fit part will process the self-locking part on multiple threads at the same time. Thereby forming a self-locking surface. With such a structure, when the thread of the bolt is connected with the thread of the supporting component or equipment, an interference fit is formed between the thread, so as to exert a locking force on the thread, so that the bolt realizes the self-locking function and retracts It will not loosen when it comes to rotational force or vibration force, ensuring the reliability of the bolted connection, so that the safety and reliability of the equipment using bolts are comprehensively improved. The self-locking bolt of the present invention has the advantages of simple structure, low cost and simple processing. After the bolt is connected with the connecting part, the anti-loosening function can be realized, and the self-locking function can be realized when the bolt is subjected to vibration or rotational force, thereby effectively improving the connection. reliability and improve the overall safety of the equipment.

The self-locking function is realized when the power is applied, which effectively improves the connection reliability and the overall safety of the equipment.

The present invention has been exemplarily described above in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited by the above-mentioned methods, as long as various improvements made by the method concept and technical solutions of the present invention are adopted, or the present invention is modified without improvement. If the concept and technical solutions of the invention are directly applied to other occasions, they are all within the protection scope of the present invention.

Claims (8)

1. A self-locking bolt, characterized in that: the self-locking bolt comprises a bolt body (1), a threaded portion (2) is provided on the bolt body (1), and the threaded portion (2) is composed of multiple threads (3). ), each thread (3) includes the top of the thread (4), the left side of the thread (5) and the right side of the thread (6), and the top of the thread (4) of each thread (3) A plane portion (7) is provided, and the joint portion of the plane portion (7) and the left side surface (5) of the screw thread is provided with a left bulging portion (8), and the plane portion (7) and the right side surface (6) of the screw thread are provided A right bulge (9) is set at the junction of the . 2. The self-locking bolt according to claim 1, wherein the flat part (7), the left bulging part (8) and the right bulging part (9) form a self-locking part (10), The left side surface (5) of the screw teeth and the right side surface (6) of the screw teeth have an inverted V-shaped cross section, and each screw thread (3) is provided with a plurality of plane parts (7) along the circumference of the screw teeth (3) according to the gaps. A left bulging portion (8) is provided at the joint portion of each flat portion (7) and the left side surface (5) of the screw thread, and a left bulge portion (8) is provided at the joint portion of each flat portion (7) and the right side surface (6) of the screw thread. Right bulge (9). 3. The self-locking bolt according to claim 1 or 2, characterized in that: the threaded portion (2) is provided with multiple self-locking surfaces (11), and a plurality of self-locking surfaces (11) located on the same plane on the threaded portion (2) The self-locking portion (10) forms a self-locking surface (11), and each self-locking surface (11) is respectively arranged in parallel with the centerline (12) of the bolt body. 4. The self-locking bolt according to claim 3, characterized in that: the threaded portion (2) is provided with multiple self-locking surfaces (11) around the threaded portion (2), and each self-locking surface (11) A self-locking surface center surface (14) is formed between the center line (13) of the self-locking surface and the center line (12) of the bolt body, and the self-locking surface center surface (14) of each self-locking surface (11) is adjacent to the The included angle of the central surface (14) of a self-locking surface is an equal angle structure. 5 . The self-locking bolt according to claim 3 , wherein the self-locking surface ( 11 ) on the threaded portion ( 2 ) of the self-locking bolt is set to a structure formed by applying pressure to a press-fitting component. 6 . . 6. A method for manufacturing a self-locking bolt, characterized in that: the manufacturing steps of the method for manufacturing a self-locking bolt are: 1) controlling the drop of the press-fitting part, moving in the direction of the bolt body (1), and applying pressure through the press-fitting part On the threads (3) of the bolt body (1), the tops (4) of the threads (3) are deformed under pressure, and one side of the tops (4) of the threads bulges toward the left side (5) of the threads. A left bulge (8) is formed, the other side of the thread end (4) bulges toward the right side (6) of the thread to form a right bulge (9), and the top of the thread top (4) forms a flat surface (7), a self-locking part (10) is formed at a position of the screw thread (4); 2) Raise the press-fitting part, loosen the bolt body (1), turn the bolt body (2), and apply the pressure-fitting part through the press-fitting part The pressure is at another position of the screw thread (3), and another self-locking part (10) is formed at another position of the screw thread (3) to complete the pressing and production of the self-locking bolt; 3) Repeat the above steps to complete the self-locking in batches Production of bolts. 7. The method for manufacturing a self-locking bolt according to claim 6, characterized in that: applying pressure by a press-fitting component before the thread portion (2) of the bolt body (1), and placing the screw of the bolt body (1) by a positioning component. The bolt head (15) is clamped, the bolt thread end (16) of the bolt body (1) is positioned by the positioning part, the bolt body (1) is fixed, and then pressure is applied to the thread part (2) by the press-fitting part . 8. The method for manufacturing a self-locking bolt according to claim 6 or 7, characterized in that: when applying pressure on the threaded portion (2) of the bolt body (1) by the press-fitting member, the press-fitting member applies pressure on the threaded portion at one time. At the same time, it acts on a plurality of threads (3) at the same time, thereby forming a self-locking surface (11) on the thread portion (2).

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