Anti-seismic hexagon bolt

Abstract

The utility model discloses an anti-seismic hexagon bolt which comprises a bolt head and a screw rod, buffering assemblies are arranged on the upper side and the lower side of the bolt head, the screw rod is composed of a coarse thread section, a polished rod section and a fine thread section, each buffering assembly comprises a buffering block in a top installation groove and a connecting block in a bottom butt joint groove, and the polished rod section is provided with an annular groove and an annular buffering ring. The bidirectional buffer layer of the bolt head can absorb axial vibration energy, disperse radial stress and reduce hard contact, the coarse thread section achieves rapid pre-tightening and high-strength fixing, the polished rod section absorbs transverse vibration through the annular buffer ring and reduces stress concentration, the fine thread section conducts secondary locking to prevent loosening, and the bolt head is suitable for the high-frequency vibration environment. And the U-shaped groove in the crest of the fine thread section can store a lubricant or deformation allowance, so that the friction loss is relieved, the friction force of a contact surface is increased, and the service life is prolonged.

Description

Technical Field

[0001] This utility model specifically relates to an anti-vibration hexagonal bolt. Background Technology

[0002] Hex bolts are a common type of fastener with a hexagonal head. They are widely used in various industries such as machinery manufacturing, construction, automobiles, and electronics. Traditional hex bolts are usually used with matching nuts. However, ordinary bolts rely on the static friction generated by the preload to resist slippage. In a vibrating environment, the slight reciprocating motion can cause a "ratchet effect" between the threads, and the preload decays exponentially, which can easily lead to brittle fracture of the bolt, causing major accidents or cost losses.

[0003] Therefore, it is necessary to invent a shock-resistant hexagonal bolt to solve the above problems. Utility Model Content

[0004] (a) Purpose of the utility model

[0005] To address the technical problems existing in the background art, this utility model proposes an anti-vibration hexagonal bolt, which can solve the above-mentioned problems.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: an anti-vibration hexagonal bolt, comprising a bolt head and a threaded rod connected to the bottom, wherein buffer components are provided on both the upper and lower sides of the bolt head, and the threaded rod comprises a coarse thread section, a smooth thread section and a fine thread section arranged in sequence;

[0008] The buffer assembly includes a mounting groove at the top of the bolt head and a mating groove at the bottom. A buffer block is fixed inside the mounting groove, and a connecting block is fixed inside the mating groove. The connecting block mates with the coarse thread section.

[0009] The optical rod section is provided with multiple annular grooves, and multiple annular buffer rings are installed in the multiple annular grooves.

[0010] Preferably, the outer wall of the coarse tooth section is provided with a first thread, the outer wall of the fine tooth section is provided with a second thread, the thread pitch of the first thread is greater than the thread pitch of the second thread, and the overall length of the fine tooth section is longer than the overall length of the coarse tooth section.

[0011] Preferably, the crest of the second thread is provided with a U-shaped groove, and the top of the U-shaped groove does not exceed the crest of the second thread.

[0012] Preferably, the inner wall of the mounting groove is further provided with an inwardly recessed slot, and the buffer block is provided with a limiting strip corresponding to the slot, the limiting strip being disposed on the edge of the buffer block.

[0013] Preferably, the connecting block has a mounting hole in the middle that matches the top of the coarse tooth segment, and a matching ring extends downward from the mounting hole, and the top of the coarse tooth segment has a corresponding annular socket.

[0014] Preferably, the mounting groove and the docking groove have the same shape, and the buffer block and the connecting block have the same overall shape.

[0015] Preferably, the plurality of annular grooves are evenly spaced, the plurality of annular buffer rings are also spaced, and the overall outer diameter of the annular buffer rings does not exceed the outer diameter of the annular grooves.

[0016] Compared with the prior art, the beneficial effects of the above-mentioned technical solution of this utility model are:

[0017] 1. This utility model forms a two-way buffer layer by setting buffer blocks and connecting blocks on the upper and lower sides of the bolt head respectively. Under vibration or impact load, the buffer blocks absorb axial vibration energy and the connecting blocks disperse radial stress, effectively reducing the hard contact between the bolt head and the connecting parts.

[0018] 2. The coarse thread section of this utility model provides rapid pre-tightening and initial high-strength fixation. The smooth thread section is a flexible transition zone that absorbs lateral vibration energy through an annular buffer ring, reducing stress concentration at the root of the thread. The fine thread section is finely adjusted and locked twice to prevent loosening. It is especially suitable for high-frequency vibration environments.

[0019] 3. The U-shaped groove of the threaded two-tooth crest of this utility model can store a small amount of lubricant or deformation allowance, which can reduce the frictional loss of the thread meshing surface during vibration, extend the service life, and increase the frictional force of the contact surface during vibration. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the overall disassembled structure of this utility model;

[0023] Figure 3 This is a schematic diagram of the U-shaped groove structure of the fine tooth segment of this utility model;

[0024] Figure 4 This is a schematic diagram of the disassembled bolt head structure of this utility model. Figure 1 ;

[0025] Figure 5 This is a schematic diagram of the disassembled bolt head structure of this utility model. Figure 2 .

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Bolt head; 11. Mounting groove; 12. Butt groove; 13. Buffer block; 14. Connecting block; 15. Slot; 16. Limiting strip; 17. Mounting hole; 18. Matching ring; 2. Screw; 21. Coarse thread section; 211. Thread one; 212. Ring socket; 22. Smooth rod section; 221. Ring groove; 222. Ring buffer ring; 23. Fine thread section; 231. Thread two; 232. U-shaped groove. Detailed Implementation

[0028] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0029] This utility model provides, for example Figure 1-5 The earthquake-resistant hexagonal bolt shown includes a bolt head 1 and a threaded rod 2 connected to the bottom. The bolt head 1 is provided with buffer components on both the upper and lower sides. The threaded rod 2 includes a coarse thread section 21, a smooth thread section 22 and a fine thread section 23 arranged in sequence.

[0030] Specifically, the buffer assembly includes a mounting groove 11 at the top of the bolt head 1 and a mating groove 12 at the bottom. A buffer block 13 is fixed inside the mounting groove 11, and a connecting block 14 is fixed inside the mating groove 12. The connecting block 14 mats with the coarse thread section 21.

[0031] Specifically, the bare rod section 22 is provided with multiple annular grooves 221, and multiple annular buffer rings 222 are installed in the multiple annular grooves 221.

[0032] In this embodiment, a hexagonal design is adopted for easy tightening with a wrench, and mounting grooves 11 and mating grooves 12 are respectively provided on the upper and lower sides. The screw 2 consists of three sections: a coarse-thread section 21, a smooth section 22, and a fine-thread section 23. The buffer assembly includes a buffer block 13, which is installed in the mounting groove 11 at the top of the bolt head to absorb axial vibration. A connecting block 14 is installed in the mating groove 12 at the bottom of the bolt head to connect the coarse-thread section 21. An annular buffer ring 222 is installed in the annular groove 221 of the smooth section 22 to absorb lateral vibration.

[0033] In this embodiment, the buffer block 13 is embedded in the mounting groove 11 and locked to the slot 15 by the limiting strip 16 to prevent it from falling off during vibration. The buffer block can be made of elastic materials such as rubber, polyurethane, or silicone to absorb impact energy.

[0034] Specifically, the connecting block 14 mates with the annular socket 212 at the top of the coarse-tooth section 21 via the mounting hole 17, forming a mechanical interlock. The matching ring 18 enhances connection stability and prevents the bolt head from rotating relative to the screw.

[0035] Reference Figure 2 The outer wall of the coarse tooth section 21 is provided with thread 1 211, and the outer wall of the fine tooth section 23 is provided with thread 231. The thread pitch of thread 1 211 is greater than the thread pitch of thread 231, and the overall length of the fine tooth section 23 is longer than the overall length of the coarse tooth section 21.

[0036] Reference Figure 3 The crest of thread 231 is provided with a U-shaped groove 232, and the top of the U-shaped groove 232 does not exceed the crest of thread 231.

[0037] In this embodiment, the coarse-pitch section 21 has a larger thread pitch 211, facilitating rapid pre-tightening and improving initial fixing strength. The smooth section 22 has multiple evenly distributed annular grooves 221, with annular buffer rings 222 installed inside to absorb lateral vibrations. The buffer rings can be made of elastomer materials, such as fluororubber or nitrile rubber, which are oil-resistant and aging-resistant. The fine-pitch section 23 has a smaller thread pitch 231, providing a finer locking force and preventing loosening. The U-shaped groove 232 can store lubricant or allow slight deformation, reducing thread wear.

[0038] Reference Figure 4-5 The inner wall of the mounting groove 11 is also provided with an inwardly recessed slot 15, and the buffer block 13 is provided with a limiting strip 16 corresponding to the slot 15. The limiting strip 16 is set on the edge of the buffer block 13.

[0039] Specifically, the connecting block 14 has a mounting hole 17 in the middle that matches the top of the coarse tooth section 21, and a matching ring 18 extends downward from the mounting hole 17. The top of the coarse tooth section 21 has a corresponding ring socket 212.

[0040] Specifically, the mounting groove 11 and the docking groove 12 have the same shape, and the buffer block 13 and the connecting block 14 have the same overall shape.

[0041] Specifically, multiple annular grooves 221 are evenly spaced, and multiple annular buffer rings 222 are also spaced apart, with the overall outer diameter of the annular buffer rings 222 not exceeding the outer diameter of the annular grooves 221.

[0042] In this embodiment, the coarse thread section 21 is suitable for quick installation and bears the main load. The fine thread section 23 is longer, ensuring sufficient thread engagement length under vibration to prevent stripping. The U-groove 232 is located at the crest of the thread 231, which reduces stress concentration and improves fatigue resistance.

[0043] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A seismic-resistant hexagonal bolt, characterized in that: It includes a bolt head (1) and a screw rod (2) connected to the bottom. The bolt head (1) is provided with buffer components on both the upper and lower sides. The screw rod (2) includes a coarse tooth section (21), a smooth tooth section (22) and a fine tooth section (23) arranged in sequence. The buffer assembly includes a mounting groove (11) at the top of the bolt head (1) and a mating groove (12) at the bottom. A buffer block (13) is fixed inside the mounting groove (11), and a connecting block (14) is fixed inside the mating groove (12). The connecting block (14) is mated to the coarse tooth section (21). The smooth rod section (22) is provided with multiple annular grooves (221), and multiple annular buffer rings (222) are installed in the multiple annular grooves (221).

2. The anti-seismic hexagonal bolt according to claim 1, characterized in that: The outer wall of the coarse tooth section (21) is provided with thread one (211), and the outer wall of the fine tooth section (23) is provided with thread two (231). The thread pitch of thread one (211) is greater than the thread pitch of thread two (231), and the overall length of the fine tooth section (23) is longer than the overall length of the coarse tooth section (21).

3. The anti-seismic hexagonal bolt according to claim 2, characterized in that: The crest of the second thread (231) is provided with a U-shaped groove (232), and the top of the U-shaped groove (232) does not exceed the crest of the second thread (231).

4. The anti-seismic hexagonal bolt according to claim 1, characterized in that: The inner wall of the mounting groove (11) is also provided with an inwardly recessed slot (15), and the buffer block (13) is provided with a limiting strip (16) corresponding to the slot (15), and the limiting strip (16) is provided on the edge of the buffer block (13).

5. The anti-seismic hexagonal bolt according to claim 2, characterized in that: The connecting block (14) has a mounting hole (17) in the middle that matches the top of the coarse tooth section (21), and a matching ring (18) extends downward from the mounting hole (17). The top of the coarse tooth section (21) has a corresponding ring socket (212).

6. The anti-seismic hexagonal bolt according to claim 1, characterized in that: The mounting groove (11) and the docking groove (12) have the same shape, and the buffer block (13) and the connecting block (14) have the same overall shape.

7. The anti-seismic hexagonal bolt according to claim 1, characterized in that: The multiple annular grooves (221) are evenly spaced, and the multiple annular buffer rings (222) are also spaced apart, and the overall outer diameter of the annular buffer rings (222) does not exceed the outer diameter of the annular grooves (221).

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