Buffering bolt structure for shock absorption and noise reduction

Abstract

The utility model relates to the technical field of mechanical fasteners, and discloses a shock absorption and noise reduction buffer bolt structure which comprises a bolt rod, a bolt head is fixedly arranged at the top end of the bolt rod, a hexagonal groove is formed in the middle of the top end of the bolt head, the hexagonal groove and the bolt rod are coaxial, an elastic buffer assembly is arranged at the bottom end of the bolt head, and the elastic buffer assembly and the bolt rod are coaxial. The elastic buffering assembly is located at the top of the bolt rod, and a protection assembly for protecting the elastic buffering assembly is arranged at the bottom of the bolt head. The elastic buffering assembly is arranged at the top of the bolt rod, the elastic buffering assembly can absorb vibration energy through elastic deformation in the environment of providing supporting, dynamic load or high-frequency vibration between the bolt head and an object, the buffering and damping effects can be achieved, meanwhile, loss of pre-tightening force can be compensated, the bolt rod is prevented from loosening, and the noise reduction effect is improved; and the generation of noise is reduced.

Description

Technical Field

[0001] This utility model relates to the field of mechanical fastener technology, specifically to a shock-absorbing and noise-reducing buffer bolt structure. Background Technology

[0002] A bolt is a mechanical fastener mainly used to connect and fix two or more components through threaded engagement. It typically consists of a bolt head, a threaded rod, and a threaded section. It achieves a stable connection of the structure by relying on preload to generate friction or by directly bearing shear force. It is widely used in mechanical equipment, construction, automobiles, aerospace and other fields, and has the characteristics of being detachable, having a high load-bearing capacity, and being highly standardized.

[0003] When traditional bolts are used to fasten connecting parts, they are prone to noise and structural fatigue due to rigid contact and vibration transmission, especially in dynamic load or high-frequency vibration environments (such as engines, wind turbines, rail transit, etc.). In the existing technology, some bolts are equipped with rubber washers or spring washers to alleviate vibration, but the damping effect is limited and the impact energy cannot be effectively dispersed. The noise reduction performance decreases over time.

[0004] Therefore, there is an urgent need for a bolt with good vibration damping effect to achieve long-term vibration reduction and noise reduction. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a shock-absorbing and noise-reducing buffer bolt structure, which has the advantages of shock absorption and noise reduction, and solves the problems mentioned in the background technology.

[0006] This utility model provides the following technical solution: a shock-absorbing and noise-reducing buffer bolt structure, including a bolt rod, a bolt head fixedly provided at the top end of the bolt rod, a hexagonal groove opened in the middle of the top end of the bolt head, the hexagonal groove being coaxial with the bolt rod, an elastic buffer component provided at the bottom end of the bolt head, the elastic buffer component being located at the top of the bolt rod, and a protective component providing protection for the elastic buffer component at the bottom of the bolt head.

[0007] As a preferred embodiment of this utility model, the elastic buffer assembly includes a disc spring, which is sleeved on the smooth circular portion of the bolt rod. The trough of the disc spring is filled with a rubber damping ring. A washer 1 is fixedly provided at the top of the disc spring, and a washer 2 is fixedly provided at the bottom of the disc spring. Copper-nickel composite bushings are fixedly provided on the inner walls of both the first and second washers. The copper-nickel composite bushings are slidably connected to the smooth circular portion of the bolt rod, and the inner wall of the copper-nickel composite bushings is coated with damping grease.

[0008] As a preferred embodiment of this utility model, the top of the washer is fixedly provided with a protrusion, and the bottom of the bolt head is provided with a groove, wherein the protrusion and the groove are engaged and connected.

[0009] As a preferred embodiment of this utility model, a damping rubber pad is bonded to the top of the first washer, and a notch corresponding to the protrusion is opened on the surface of the first damping rubber pad. A damping rubber pad is bonded to the bottom of the second washer.

[0010] As a preferred embodiment of the present invention, the protective component includes a protective cover, the top of which has an installation groove, a retaining ring is fixedly provided inside the installation groove, and the bottom of the bolt head has a retaining groove that engages with the retaining ring.

[0011] As a preferred embodiment of this utility model, the inner wall of the retaining ring is fixedly provided with a rubber filling strip, and the surface of the retaining ring is provided with a deformation groove.

[0012] As a preferred embodiment of this utility model, the surface of the bolt rod is fitted with a double-layered self-locking washer, and the top and bottom ends of the double-layered self-locking washer are provided with serrated engagement surfaces.

[0013] As a preferred embodiment of this utility model, the bottom of the bolt rod is provided with threads, and a locking nut is connected to the bottom of the bolt rod through the threads.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. By setting an elastic buffer component at the top of the bolt shank, support can be provided between the bolt head and the object. Under dynamic load or high-frequency vibration, the elastic buffer component absorbs vibration energy through elastic deformation, which can play a role in buffering and shock absorption. At the same time, it can compensate for the loss of preload, prevent the bolt shank from loosening, improve the noise reduction effect, and reduce the generation of noise.

[0016] 2. The protective components provide shielding protection for the elastic buffer components, preventing them from being exposed to the outside. The elastic buffer components are not prone to aging or contamination, have good durability, and the protective components are easy to install and remove, and are stable and reliable. Attached Figure Description

[0017] Fig. 1 This is one of the structural schematic diagrams of this utility model;

[0018] Fig. 2 This is the second structural schematic diagram of the present invention;

[0019] Fig. 3 This is a schematic diagram of the exploded structure of this utility model;

[0020] Fig. 4 This is a schematic diagram of the structure of the elastic buffer component of this utility model;

[0021] Fig. 5 This is an exploded structural diagram of the elastic buffer assembly of this utility model;

[0022] Fig. 6 This is a schematic diagram of the structure of the protective component of this utility model;

[0023] Fig. 7 This is a schematic diagram of the structure of the bottom end of the bolt head of this utility model.

[0024] In the diagram: 1. Bolt rod; 2. Bolt head; 3. Elastic buffer assembly; 301. Disc spring; 302. Rubber damping ring; 303. Washer 1; 304. Protrusion; 305. Washer 2; 306. Copper-nickel composite bushing; 307. Damping rubber pad 1; 308. Damping rubber pad 2; 309. Notch; 4. Groove; 5. Slot; 6. Hexagonal slot; 7. Protective assembly; 701. Protective cover; 702. Mounting slot; 703. Snap ring; 704. Rubber filler strip; 705. Deformation groove; 8. Double-layered self-locking washer; 9. Locking nut. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figs. 1-7 The shock-absorbing and noise-reducing buffer bolt structure includes a bolt rod 1, a bolt head 2 fixed at the top of the bolt rod 1, a hexagonal groove 6 in the middle of the top of the bolt head 2, the hexagonal groove 6 being coaxial with the bolt rod 1, an elastic buffer component 3 at the bottom of the bolt head 2, the elastic buffer component 3 being located at the top of the bolt rod 1, and a protective component 7 at the bottom of the bolt head 2 providing protection for the elastic buffer component 3. By setting the elastic buffer component 3 at the top of the bolt rod 1, support can be provided between the bolt head 2 and the object. Under dynamic load or high-frequency vibration, the elastic buffer component 3 absorbs vibration energy through elastic deformation, which can play a role in buffering and shock absorption, while also compensating for the loss of preload and preventing the bolt rod 1 from loosening.

[0027] In this embodiment, preferably, the elastic buffer assembly 3 includes a disc spring 301, which is sleeved on the smooth circular portion of the bolt rod 1. A rubber damping ring 302 is filled inside the trough of the disc spring 301. A washer 303 is fixedly provided at the top of the disc spring 301, and a washer 305 is fixedly provided at the bottom of the disc spring 301. Copper-nickel composite bushings 306 are fixedly provided on the inner walls of both the washer 303 and the bushing 305. The copper-nickel composite bushings 306 are slidably connected to the smooth circular portion of the bolt rod 1. The inner wall of the copper-nickel composite bushings 306 is coated with damping grease. A protrusion 304 is fixedly provided at the top of the washer 303. A groove 4 is provided at the bottom of the bolt head 2. The protrusion 304 engages with the inside of the groove 4. A damping rubber pad 307 is adhered to the top of the washer 303. A notch corresponding to the protrusion 304 is provided on the surface of the damping rubber pad 307. 309. Damping rubber pad 308 is bonded to the bottom of washer 305. Washer 1 303 and washer 305 can support both ends of disc spring 301, ensuring pressure stability. Disc spring 301 can provide support between bolt head 2 and object. Under dynamic load or high-frequency vibration environment, disc spring 301 absorbs vibration energy through elastic deformation, which can play a role in buffering and shock absorption. Protrusion 304 and groove 4 can improve the stability of washer 1 303. Copper-nickel composite bushing 306 can prevent washer 1 303 and washer 2 305 from shifting and can ensure sliding ability. In combination with damping rubber pad 1 307, damping rubber pad 2 308 and damping grease, it can provide sliding damping and avoid resonance. By filling the trough of disc spring 301 with rubber damping ring 302, high-frequency vibration can be absorbed simultaneously, improving the noise reduction effect.

[0028] In this embodiment, preferably, the protective component 7 includes a protective cover 701. The top of the protective cover 701 has an installation groove 702. A retaining ring 703 is fixedly installed inside the installation groove 702. The bottom of the bolt head 2 has a retaining groove 5 that engages with the retaining ring 703. A rubber filler strip 704 is fixedly installed on the inner wall of the retaining ring 703. A deformation groove 705 is installed on the surface of the retaining ring 703. The protective cover 701 can be installed through the retaining ring 703 and the retaining groove 5. The deformation groove 705 ensures that the retaining ring 703 undergoes elastic deformation during installation and disassembly. The rubber filler strip 704 can fill the gap between the retaining ring 703 and the retaining groove 5, which can prevent the protective cover 701 from loosening and ensure stability and reliability. The protective cover 701 can provide shielding protection for the elastic buffer component 3.

[0029] In this embodiment, preferably, a double-layered self-locking washer 8 is fitted on the surface of the bolt rod 1. The top and bottom ends of the double-layered self-locking washer 8 are provided with serrated engagement surfaces. The bottom of the bolt rod 1 is provided with threads. The bottom of the bolt rod 1 is connected to a locking nut 9 through the threads. The double-layered self-locking washer 8 can improve the anti-loosening ability of the locking nut 9.

[0030] In use, first, the disc spring 301 of the elastic buffer assembly 3 is sleeved on the bolt rod 1, and the protrusion 304 is engaged with the groove 4 at the bottom of the bolt head 2. Then, the bolt rod 1 is passed through the bolt hole, and the double-layer self-locking washer 8 is sleeved on the bolt rod 1. After that, the locking nut 9 is tightened, and the object can be fixed by the bolt rod 1. Finally, the protective cover 701 of the protective assembly 7 is installed on the bolt head 2 by the retaining ring 703 and the retaining groove 5. The setting of the deformation groove 705 can ensure that the retaining ring 703 will undergo elastic deformation during installation and disassembly. The rubber filling strip 704 can fill the gap between the retaining ring 703 and the retaining groove 5, which can prevent the protective cover 701 from loosening, making it stable and reliable. The protective cover 701 can provide shielding protection for the elastic buffer assembly 3.

[0031] When bolt rod 1 is under force, washer 303 and washer 305 can support both ends of disc spring 301, ensuring pressure stability. Disc spring 301 can provide support between bolt head 2 and the object. Under dynamic load or high-frequency vibration, disc spring 301 absorbs vibration energy through elastic deformation, which can play a role in buffering and shock absorption. Protrusion 304 and groove 4 can improve the stability of washer 303. Copper-nickel composite bushing 306 can prevent washer 303 and washer 305 from shifting and can ensure sliding ability. In combination with damping rubber pad 307, damping rubber pad 308 and damping grease, it can provide sliding damping and avoid resonance. Since the trough of disc spring 301 is filled with rubber damping ring 302, it can absorb high-frequency vibration synchronously and improve the noise reduction effect.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A shock-absorbing and noise-reducing buffer bolt structure, comprising a bolt shank (1), characterized in that: The top end of the bolt rod (1) is fixedly provided with a bolt head (2), and a hexagonal groove (6) is provided in the middle of the top end of the bolt head (2). The hexagonal groove (6) is coaxial with the bolt rod (1). The bottom end of the bolt head (2) is provided with an elastic buffer assembly (3). The elastic buffer assembly (3) is located at the top of the bolt rod (1). The bottom of the bolt head (2) is provided with a protective assembly (7) that provides protection for the elastic buffer assembly (3).

2. The shock-absorbing and noise-reducing buffer bolt structure according to claim 1, characterized in that: The elastic buffer assembly (3) includes a disc spring (301), which is sleeved on the smooth round part of the bolt rod (1). The trough of the disc spring (301) is filled with a rubber damping ring (302). A washer 1 (303) is fixedly provided at the top of the disc spring (301), and a washer 2 (305) is fixedly provided at the bottom of the disc spring (301). Copper-nickel composite bushings (306) are fixedly provided on the inner walls of both the inner walls of the first washer (303) and the inner walls of the second washer (305). The copper-nickel composite bushings (306) are slidably connected to the smooth round part of the bolt rod (1), and the inner wall of the copper-nickel composite bushings (306) is coated with damping grease.

3. The shock-absorbing and noise-reducing buffer bolt structure according to claim 2, characterized in that: The top of the washer (303) is fixedly provided with a protrusion (304), and the bottom of the bolt head (2) is provided with a groove (4). The protrusion (304) and the groove (4) are engaged and connected internally.

4. The shock-absorbing and noise-reducing buffer bolt structure according to claim 3, characterized in that: The top of the first washer (303) is bonded with a first damping rubber pad (307), and the surface of the first damping rubber pad (307) is provided with a notch (309) corresponding to the protrusion (304). The bottom of the second washer (305) is bonded with a second damping rubber pad (308).

5. The shock-absorbing and noise-reducing buffer bolt structure according to claim 1, characterized in that: The protective component (7) includes a protective cover (701), the top of the protective cover (701) is provided with a mounting groove (702), a retaining ring (703) is fixedly provided inside the mounting groove (702), and the bottom of the bolt head (2) is provided with a retaining groove (5) that engages with the retaining ring (703).

6. The shock-absorbing and noise-reducing buffer bolt structure according to claim 5, characterized in that: The inner wall of the retaining ring (703) is fixedly provided with a rubber filler strip (704), and the surface of the retaining ring (703) is provided with a deformation groove (705).

7. The shock-absorbing and noise-reducing buffer bolt structure according to claim 1, characterized in that: The surface of the bolt rod (1) is fitted with a double-layered self-locking washer (8), and the top and bottom ends of the double-layered self-locking washer (8) are provided with serrated engagement surfaces.

8. The shock-absorbing and noise-reducing buffer bolt structure according to claim 1, characterized in that: The bottom of the bolt rod (1) is provided with threads, and the bottom of the bolt rod (1) is connected to a lock nut (9) by the threads.

Images