High-vibration-resistance bolt

Abstract

The invention provides a high-vibration-resistance bolt which comprises a bolt body, and the section of a whole threaded rod of the bolt body is in a three-leaf shape. The thread grooves between the thread teeth on the bolt body are divided into outer metric 60-degree thread grooves and inner 30-degree interference thread grooves; a guide tooth thread part used for being tapped into an internal thread of a nut is arranged at the position, close to the front end, of a threaded rod of the bolt body. In the design of the product, the 60-degree thread form is a standard metric thread and is responsible for bearing the load of the bolt, and the 30-degree thread form is responsible for being tapped into an internal thread of the nut, so that the thread is in close fit to achieve the anti-loosening and anti-vibration effects; due to the characteristic design of the thread part of the guide teeth, smooth transition between the bolt and the nut during threaded connection is ensured, and stress concentration in threaded connection is reduced.

Description

Technical Field

[0001] The present invention mainly relates to the technical field of metal fastener products, and specifically relates to a high anti-vibration bolt. Background Art

[0002] The existing thread connection method of conventional metric bolts and nuts is not conducive to anti-vibration and anti-loosening. As shown in the attached Figure 5 connection structure, therefore, when in use, if anti-vibration and anti-loosening are required, anti-slip gaskets or anti-slip nuts are often used to achieve the anti-vibration effect, but in fact, the anti-vibration and anti-loosening effects are average; Therefore, it is necessary to develop a bolt with high anti-vibration interference fit and transitional meshing anti-loosening threads. Summary of the Invention

[0003] Based on this, the purpose of the present invention is to provide a high anti-vibration bolt to solve the technical problems raised in the above background art.

[0004] To achieve the above purpose, the present invention provides the following technical solutions: A high anti-vibration bolt, including a bolt body, characterized in that: The cross-section of the entire threaded rod of the bolt body is a three-leaf type; The thread grooves between the thread teeth on the bolt body are divided into an outer metric 60° thread groove and an inner 30° interference thread groove; A guiding tooth thread part is provided at a position near the front end of the threaded rod of the bolt body for threading into the internal thread of the nut.

[0005] Further, when the bolt body is threadedly connected to the nut, the metric 60° thread groove is responsible for bearing the axial clamping force.

[0006] Further, the 30° interference thread groove is responsible for threading into the bottom of the internal thread tooth of the nut, and the thread groove specification of the nut is a conventional metric 60°.

[0007] Further, the angular parameter range of the metric 60° thread groove is 60°±1°.

[0008] Further, the angular parameter range of the 30° interference thread groove is 30°±2°.

[0009] Further, the tip specification of the thread tooth is R = 0.1P, and the bottom specification is R = 0.125P, where R is the radius and P is the pitch.

[0010] In summary, the present invention mainly has the following beneficial effects: The self-locking property is enhanced. In the design of the product of the present invention, the 60° thread profile is a standard metric thread, which is responsible for bearing the bolt load, while the 30° thread profile is responsible for threading into the internal thread of the nut, so that the threads are tightly fitted to achieve the effect of preventing loosening and resisting vibration. The characteristic design of the guiding thread part ensures a smooth transition between the bolt and the nut during thread connection, reducing stress concentration in the thread connection. Description of the Drawings

[0011] Figure 1 It is a schematic diagram of the entire threaded rod structure of the bolt body of the present invention; Figure 2 It is a cross-sectional view of the threaded rod of the present invention; Figure 3 It is a schematic diagram of the thread groove structure of the present invention; Figure 4 For the present invention Figure 1 Enlarged view of area A; Figure 5 It is a schematic diagram of the thread connection between a conventional metric nut and a conventional metric bolt of the present invention; Reference numerals: 1, bolt body; 2, thread tooth; 3, guiding thread part; 4, nut. Detailed Embodiment

[0012] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present invention and should not be construed as limiting the present invention.

[0013] Next, according to the overall structure of the present invention, its embodiments will be described. Embodiment

[0014] Referring to the attached Figures 1-4 As shown, the present technical solution provides a high anti-vibration bolt, including a bolt body 1. The cross-section of the entire threaded rod of the bolt body 1 is a three-leaf type, as shown in detail in the attached Figure 2 As shown; this product uses a three-leaf type threaded rod and has significant advantages in improving connection strength, reducing tapping torque, optimizing installation space, and improving self-locking performance, and is suitable for a variety of application scenarios; Looking at the specific structural details, the thread grooves between the thread teeth 2 on the bolt body 1 of this product are divided into an outer metric 60° thread groove and an inner 30° interference thread groove. The angle parameter range of the metric 60° thread groove is 60° ± 1°, and the angle parameter range of the 30° interference thread groove is 30° ± 2°, as shown in detail in Figure 3 As shown; When the bolt body 1 is threadedly connected to the nut 4, the metric 60° thread groove is responsible for bearing the axial clamping force, as shown in detail inFigure 5 As shown, in the current conventional threaded connection method, when a common bolt with a metric 60° thread groove mates with a nut 4 to maintain the connection stability, the threaded connection of this product will also maintain the same structural effect; The 30° interference thread groove is responsible for entering the bottom of the internal thread of the nut 4, and the thread groove specification of this nut 4 is the conventional metric 60°. In the threaded connection between the bolt body 1 and the nut 4 of this product, when the metric 60° thread groove meshes with the internal thread of the nut 4, the pressure during the continuous screwing of both sides will continue to press the internal thread of the nut 4 into the 30° interference thread groove to produce a certain deformation to achieve the biting force of the interference fit. Since the internal thread of the deformed nut 4 deviates from the preset thread path size, in the anti-loosening test, it will continuously maintain the effect of resisting the vibration force brought by external factors. From a structural perspective, it can be regarded as achieving an anti-slip effect on the overall contact surface of the thread to achieve the anti-loosening purpose. And during the later disassembly, when using a wrench tool with a force exceeding a certain value for disassembly, the threaded connection can be released. However, when the bolt body 1 of this product needs to be used again, a new nut 4 needs to be replaced for adaptation to ensure that the biting ability effect is in a better state.

[0015] In addition, during use, a lubricating medium can be used in the threaded connection between the bolt body 1 and the nut 4 to reduce the friction effect, making the interference fit process smoother.

[0016] In this embodiment, the specification requirements for this product also include: the tip specification of the thread tooth 2 is R = 0.1P, and the bottom specification is R = 0.125P, where R is the radius and P is the pitch.

[0017] At the position near the front end of the threaded rod of the bolt body 1, there is a guiding tooth thread part 3 for entering the internal thread of the nut 4, and its working method is as follows: Guiding the bolt body 1 into the nut 4: The design of the guiding tooth thread part 3 enables the bolt body 1 to smoothly enter the internal thread of the nut 4 when entering, avoiding deflection or inclination of the bolt body 1 during the entering process.

[0018] Reducing the initial entering resistance: The guiding tooth thread part 3 usually has a smaller thread height or a special shape, making the torque required for the bolt body 1 to initially enter smaller and easier to cut into the internal thread of the nut 4.

[0019] Ensuring thread centering: The guiding tooth thread part 3 helps to ensure that the threads of the bolt body 1 and the nut 4 are centered during the entering process, thereby reducing the friction and wear between the threads and improving the accuracy and efficiency of entering.

[0020] The functions are as follows: Improve threading accuracy: The design of the guiding thread part 3 can ensure that when the bolt body 1 is threaded into the internal thread of the nut 4, the threads can be accurately aligned, thus improving the threading accuracy.

[0021] Reduce the risk of thread damage: By reducing skewness and friction during threading, the guiding thread part 3 can effectively reduce the risk of thread damage and extend the service life of the bolt body 1 and the nut 4.

[0022] Reduce threading torque: The design of the guiding thread part 3 enables the bolt body 1 to require less torque during threading, thus reducing the torque requirement during threading and making the threading process smoother.

[0023] Improve assembly efficiency: The guiding function of the guiding thread part 3 can significantly reduce the adjustment time of the bolt body 1 during threading, improve the assembly efficiency, especially in the automated assembly process.

[0024] Although the embodiments of the present invention have been shown and described, the specific embodiments are only interpretations of the present invention and not limitations thereof. The specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art can, without departing from the principles and purposes of the present invention, make modifications, substitutions and variations that do not contribute creatively to the embodiments as needed, but as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A highly vibration-resistant bolt, comprising a bolt body (1), characterized in that: The cross-section of the entire threaded rod of the bolt body (1) is a three-leaf type; The threaded grooves between the thread teeth (2) on the bolt body (1) are divided into an outer metric 60° threaded groove and an inner 30° interference threaded groove; A guiding tooth thread portion (3) is provided at a position near the front end of the threaded rod of the bolt body (1) for threading into the internal thread of the nut (4).

2. The high anti-vibration bolt according to claim 1, characterized in that, When the bolt body (1) is threadedly connected to the nut (4), the metric 60° threaded groove is responsible for bearing the axial clamping force.

3. The high anti-vibration bolt according to claim 2, characterized in that, The 30° interference threaded groove is responsible for threading into the bottom of the internal thread of the nut (4), and the thread groove specification of the nut (4) is a conventional metric 60°.

4. A highly vibration-resistant bolt according to claim 1, characterized in that, The angular parameter range of the metric 60° threaded groove is 60° ± 1°.

5. A highly vibration-resistant bolt according to claim 1, characterized in that, The angular parameter range of the 30° interference threaded groove is 30° ± 2°.

6. A highly vibration-resistant bolt according to claim 1, characterized in that, The tip specification of the thread tooth (2) is R = 0.1P, and the root specification is R = 0.125P, where R is the radius and P is the pitch.

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