High-strength compression-resistant bolt

Abstract

The high-strength compression-resistant bolt comprises a bolt head, a bolt rod, an elastic assembly, a compression-resistant assembly, a metal ring, a damping rod, a damping spring, a vertical groove and a reinforcing rib, the lower portion of the bolt head is fixedly connected with the bolt rod, and the outer wall of the upper portion of the bolt rod is in threaded connection with the elastic assembly and the compression-resistant assembly; the anti-compression assembly is located below the elastic assembly, the elastic assembly comprises a metal ring, a damping rod and a damping spring, the metal ring is screwed to the outer wall of the bolt rod in a threaded mode, the damping rod is arranged above the metal ring, the damping spring is arranged outside the damping rod in a sleeving mode, and the upper portion of the damping spring abuts against the lower end face of the bolt head. According to the anti-cracking bolt, generated vibration force can be further weakened, so that the stability of the bolt in the using process is improved, the anti-cracking bolt has high pressure resistance, and the anti-cracking bolt is not prone to breakage after being used for a long time.

Description

Technical Field

[0001] The utility model relates to the technical field of bolts, in particular to the technical field of high-strength compressive bolts. Background Technique

[0002] Bolts are commonly used fasteners. Due to their low cost, wide application range, and relatively high connection reliability, bolts are widely used. However, in some special application scenarios, very high requirements are imposed on the connection tightness, especially in the use on high-speed railways. For bolts used on high-speed railways, very high requirements are imposed because during the rapid operation of high-speed railways, due to the high speed, the structural strength pressure borne is relatively large. As a result, after long-term use, the connection between the bolt head and the bolt rod is prone to fracture, thereby reducing the service life of the bolt.

[0003] To solve the problems raised in the background technique, for example, the high-strength bolt disclosed in Application No. CN201320693335.7 includes a bolt head and a screw rod that are an integral body. The screw rod includes a smooth rod portion and a threaded portion. The smooth rod portion is located between the bolt head and the threaded portion. Among them, the upper part of the bolt head is an elliptical cylinder, and the end surface where the bottom of the bolt head is connected to the smooth rod portion is an elliptical cone surface. Since the upper part of the bolt head of the high-strength bolt of the present utility model is an elliptical cylinder and the end surface where the bottom of the bolt head is connected to the smooth rod portion is an elliptical cone surface, the contact area between the smooth rod portion and the bottom of the bolt head can be greatly increased. And the increase in the contact area between the smooth rod portion and the bottom of the bolt head can greatly enhance the bonding strength between the smooth rod portion and the bottom of the bolt head, thereby greatly weakening the influence of the stress generated at the connection part between the bolt head and the screw rod on the high-strength bolt of the present utility model, and further effectively preventing the occurrence of fracture at the connection between the bolt head and the screw rod of the bolt. However, this structure still has the following defects:

[0004] Although this structure makes the upper part of the bolt head an elliptical cylinder and the end surface where the bottom of the bolt head is connected to the smooth rod portion an elliptical cone surface to increase the contact area and thus enhance the bonding strength between the smooth rod portion and the bottom of the bolt head, under strong external vibrations, due to long-term mechanical vibrations, sliding will occur between the thread and the connecting piece. After long-term sliding, the bolt will become loose, affecting the normal operation of the equipment and even causing safety accidents.

[0005] In order to solve the problems raised in the above-mentioned technology, for example, application number CN201620627031.4 discloses a high-strength bolt, including a bolt body, the bolt body including a bolt head, a first threaded body, a polished rod and a second threaded body connected in sequence, the first threaded body and the second threaded body have the same diameter, and the side walls are provided with the same external threads, the diameter of the polished rod is less than or equal to the minor diameter of the external threads, and the end face of the bolt head is provided with a center hole. After the threaded connection is completed, the center shaft is driven into the center hole, and the center shaft pushes the pin into the connecting body from the radial direction, thereby avoiding the problem of loosening in a vibration environment. However, the structure still has the following defects:

[0006] Although this structure drives the center shaft into the center hole and the center shaft push pin is driven into the connecting body from the radial direction to prevent the bolt from loosening, this method is time-consuming and labor-intensive, and the operation is cumbersome. On the other hand, it does not have a good shock-absorbing effect, and the bolts are prone to breakage and fall out after a long time. Summary of the invention

[0007] The purpose of the utility model is to solve the problems in the prior art and to propose a high-strength compression-resistant bolt that can further weaken the vibration force generated, thereby improving the stability of the bolt when in use, and has strong compression resistance and is not prone to breakage even after long-term use.

[0008] To achieve the above-mentioned purpose, the utility model proposes a high-strength compression-resistant bolt, comprising a bolt head, a bolt rod, an elastic component, a compression-resistant component, a metal ring, a shock-absorbing rod, a shock-absorbing spring, a vertical groove, and a reinforcing rib. The bolt rod is fixedly connected to the bottom of the bolt head, and the upper outer wall of the bolt rod is threadedly connected with the elastic component and the compression-resistant component. The compression-resistant component is located below the elastic component. The elastic component comprises a metal ring, a shock-absorbing rod, and a shock-absorbing spring. The metal ring is threadedly screwed on the outer wall of the bolt rod, and a shock-absorbing rod is arranged above the metal ring. A shock-absorbing spring is sleeved on the outside of the shock-absorbing rod, and the upper part of the shock-absorbing spring abuts against the lower end surface of the bolt head. A vertical groove is opened on the outer surface of the bolt rod, and the vertical groove is arranged along the length direction of the bolt rod. Reinforcing ribs are arranged in the vertical groove.

[0009] Preferably, there are four shock absorbing rods, each of which is sleeved with a shock absorbing spring on its exterior, and the four shock absorbing rods are distributed in a ring array.

[0010] Preferably, the anti-pressure assembly includes a metal anti-pressure ring, an anti-pressure plate, and an anti-pressure column. The metal anti-pressure ring is threadedly screwed on the outer wall of the bolt rod, the anti-pressure plate is symmetrically arranged above the metal anti-pressure ring, and the anti-pressure column is vertically arranged above the anti-pressure plate, and the upper part of the anti-pressure column abuts against the lower end surface of the metal ring.

[0011] Preferably, there are four compression-resistant columns, which are arranged in groups of two, and the two groups of compression-resistant columns are respectively installed above the compression-resistant plates.

[0012] Preferably, there are four vertical grooves, which are distributed in a circular array, and a reinforcing rib is welded in each vertical groove, and the length of the reinforcing rib is the same as the length of the vertical groove.

[0013] Preferably, a nut is threadedly connected to the outer wall of the lower end of the bolt rod.

[0014] Beneficial effects of the utility model:

[0015] 1. The utility model can further weaken the generated vibration force by setting an elastic component, thereby improving the impact resistance of the bolt as a whole to a certain extent, so that the overall strength of the bolt is improved. When the bolt is impacted by the outside world, the bolt head drops due to the impact force, thereby driving the shock-absorbing spring to deform and drop. The shock-absorbing spring is squeezed and elastically deformed to generate elastic force, which will reduce part of the impact force. At the same time, the shock-absorbing rod can further weaken the impact force, thereby achieving the effect of reducing the impact force. The shock-absorbing rod can slow down the rebound effect of the shock-absorbing spring to a certain extent, thereby improving the overall stability of the bolt, thereby improving the overall impact resistance of the bolt, and the operation is relatively simple, and the anti-impact effect is good;

[0016] 2. The utility model can extend the service life of the bolt by using the pressure-resistant component in conjunction with the reinforcing ribs. When the impact force hits the bolt, the pressure-resistant plate and the pressure-resistant column on the metal pressure-resistant ring can jointly relieve the pressure of the impact force, so that the bolt as a whole can play an effective supporting effect. At the same time, the reinforcing ribs can strengthen the overall strength of the bolt, so that it will not break even after long-term use, thereby extending the service life of the bolt and solving the problem that the bolt is prone to breakage and disengagement after a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a front view of a high-strength compression-resistant bolt of the utility model;

[0018] Figure 2 It is a schematic diagram of an elastic component of a high-strength compression-resistant bolt of the utility model;

[0019] Figure 3 It is a schematic diagram of a compression component of a high-strength compression-resistant bolt of the utility model;

[0020] Figure 4 It is a schematic diagram of a reinforcing rib of a high-strength compression-resistant bolt of the utility model;

[0021] In the figure: 1 - bolt head, 2 - bolt rod, 3 - elastic component, 31 - metal ring, 32 - shock-absorbing rod, 33 - shock-absorbing spring, 4 - compression-resistant component, 41 - metal compression-resistant ring, 42 - compression-resistant plate, 43 - compression-resistant column, 5 - vertical groove, 6 - reinforcing rib, 7 - nut. Specific implementation mode

[0022] Refer to Figures 1 to 4 , a high-strength compression-resistant bolt of the present utility model includes a bolt head 1, a bolt rod 2, an elastic component 3, a compression-resistant component 4, a metal ring 31, a shock-absorbing rod 32, a shock-absorbing spring 33, a vertical groove 5, and a reinforcing rib 6. The bolt rod 2 is fixedly connected below the bolt head 1. The outer wall of the upper part of the bolt rod 2 is threadedly connected with an elastic component 3 and a compression-resistant component 4. The compression-resistant component 4 is located below the elastic component 3. The elastic component 3 includes a metal ring 31, a shock-absorbing rod 32, and a shock-absorbing spring 33. The metal ring 31 is threadedly screwed on the outer wall of the bolt rod 2. A shock-absorbing rod 32 is arranged above the metal ring 31. A shock-absorbing spring 33 is sleeved outside the shock-absorbing rod 32. The upper part of the shock-absorbing spring 33 abuts against the lower end surface of the bolt head 1. A vertical groove 5 is formed on the outer surface of the bolt rod 2. The vertical groove 5 is arranged along the length direction of the bolt rod 2. A reinforcing rib 6 is arranged in the vertical groove 5. When the bolt is subjected to an external impact, the bolt head 1 descends due to the impact force, thereby driving the shock-absorbing spring 33 to deform and descend. The shock-absorbing spring 33 is compressed and undergoes elastic deformation to generate an elastic force. This elastic force will reduce part of the impact force. At the same time, the shock-absorbing rod 32 can further weaken the impact force, so as to achieve the effect of reducing the impact force. And the shock-absorbing rod 32 can slow down the rebound effect of the shock-absorbing spring 33 to a certain extent, thereby improving the overall stability of the bolt, and thus improving the overall impact resistance of the bolt. The shock-absorbing rod 32 uses the working principle of a hydraulic shock absorber to achieve the effect of slowing down the rebound effect of the shock-absorbing spring 33, so this application will not be elaborated here.

[0023] Refer to Figure 2 , a high-strength compression-resistant bolt of the present utility model, the number of the shock-absorbing rods 32 is four. A shock-absorbing spring 33 is sleeved outside each shock-absorbing rod 32, and the four shock-absorbing rods 32 are distributed in a circular array, which can evenly disperse the impact force, thereby achieving the effect of weakening the vibration force.

[0024] Refer to Figure 3, a high-strength compressive bolt of the present utility model. The compressive component 4 includes a metal compressive ring 41, a compressive plate 42, and a compressive column 43. The metal compressive ring 41 is screwed onto the outer wall of the bolt rod 2. Compressive plates 42 are symmetrically arranged above the metal compressive ring 41. Compressive columns 43 are vertically arranged above the compressive plates 42. The upper part of the compressive column 43 abuts against the lower end surface of the metal ring 31. The number of compressive columns 43 is four. The four compressive columns 43 are divided into two groups, and the two groups of compressive columns 43 are respectively installed above the compressive plates 42. When an impact force impacts this bolt, the compressive plates 42 and compressive columns 43 on the metal compressive ring 41 can relieve the pressure of the impact force, enabling the bolt as a whole to achieve an effective supporting effect. In this application, the metal compressive ring 41, the compressive plate 42, and the compressive column 43 are all made of titanium alloy metal material. Titanium alloy has good mechanical properties, can withstand high-strength stress and pressure, and is not easily broken.

[0025] Refer to Figure 4 , a high-strength compressive bolt of the present utility model. The number of the vertical grooves 5 is four. The four vertical grooves 5 are distributed in a circular array. A reinforcing rib 6 is welded in each vertical groove 5. The length of the reinforcing rib 6 is the same as the length of the vertical groove 5. By evenly distributing the reinforcing ribs 6 on the bolt rod 2, the overall strength of the bolt can be evenly improved, thereby extending the service life of the bolt.

[0026] Refer to Figure 1 , a high-strength compressive bolt of the present utility model. A nut 7 is screwed onto the outer wall of the lower end of the bolt rod 2.

[0027] Working process of the present utility model:

[0028] During the working process of a high-strength compressive bolt of the present utility model, when the bolt is subjected to an external impact, the bolt head 1 drops due to the impact force, thereby driving the shock-absorbing spring 33 to deform and drop. The shock-absorbing spring 33 is compressed and undergoes elastic deformation, generating an elastic force. This elastic force will reduce part of the impact force. At the same time, the shock-absorbing rod 32 can further weaken the impact force, thereby achieving the effect of reducing the impact force. And the shock-absorbing rod 32 can, to a certain extent, slow down the rebound effect of the shock-absorbing spring 33, thereby improving the overall stability of the bolt, and thus improving the overall impact resistance of the bolt. When an impact force impacts this bolt, the compressive plates 42 and compressive columns 43 on the metal compressive ring 41 can relieve the pressure of the impact force, enabling the bolt as a whole to achieve an effective supporting effect. At the same time, the reinforcing ribs 6 can strengthen the overall strength of the bolt, so that it will not break even after long-term use, thereby extending the service life of the bolt.

[0029] The above embodiments are descriptions of the present utility model, not limitations on the present utility model. Any scheme obtained by simply transforming the present utility model belongs to the protection scope of the present utility model.

Claims

1. A high-strength compression-resistant bolt, characterized in that: The invention comprises a bolt head (1), a bolt rod (2), an elastic component (3), an anti-pressure component (4), a metal ring (31), a shock absorbing rod (32), a shock absorbing spring (33), a vertical groove (5), and a reinforcing rib (6); the bolt head (1) is fixedly connected to the bolt rod (2) below; the elastic component (3) and the anti-pressure component (4) are threadedly connected to the outer wall above the bolt rod (2); the anti-pressure component (4) is located below the elastic component (3); the elastic component (3) comprises a metal ring (31), a shock absorbing rod ( 32), a shock absorbing spring (33), the metal ring (31) is threadedly screwed on the outer wall of the bolt rod (2), a shock absorbing rod (32) is arranged above the metal ring (31), a shock absorbing spring (33) is sleeved on the outer side of the shock absorbing rod (32), the upper side of the shock absorbing spring (33) is in contact with the lower end surface of the bolt head (1), a vertical groove (5) is provided on the outer surface of the bolt rod (2), the vertical groove (5) is arranged along the length direction of the bolt rod (2), and a reinforcing rib (6) is arranged in the vertical groove (5).

2. A high-strength compression-resistant bolt according to claim 1, characterized in that: There are four shock absorbing rods (32), each of which is sleeved with a shock absorbing spring (33) on its exterior, and the four shock absorbing rods (32) are distributed in a ring array.

3. A high-strength compression-resistant bolt according to claim 1, characterized in that: The anti-pressure assembly (4) comprises a metal anti-pressure ring (41), an anti-pressure plate (42), and an anti-pressure column (43); the metal anti-pressure ring (41) is threadedly screwed onto the outer wall of the bolt rod (2); the anti-pressure plate (42) is symmetrically arranged above the metal anti-pressure ring (41); the anti-pressure column (43) is vertically arranged above the anti-pressure plate (42); the upper part of the anti-pressure column (43) abuts against the lower end surface of the metal ring (31).

4. A high-strength compression-resistant bolt as claimed in claim 3, characterized in that: The number of the anti-compression columns (43) is four, and the four anti-compression columns (43) are arranged in a group of two. The two groups of anti-compression columns (43) are respectively installed above the anti-compression plate (42).

5. A high-strength compression-resistant bolt according to claim 1, characterized in that: There are four vertical grooves (5), which are distributed in a ring array. A reinforcing rib (6) is welded inside each vertical groove (5), and the length of the reinforcing rib (6) is the same as the length of the vertical groove (5).

6. A high-strength compression-resistant bolt according to any one of claims 1 to 5, characterized in that: A nut (7) is threadedly screwed onto the outer wall of the lower end of the bolt rod (2).

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