CN213870690U - Anti-loosening fastening assembly - Google Patents

Abstract

The utility model relates to a mechanical fastener technical field especially relates to an anti-loosening fastening assembly. The anti-loosening fastening assembly comprises a bolt, a fastening nut and a locknut, wherein the bolt is provided with a first thread and a second thread which are mutually staggered and have opposite rotation directions; one end of the fastening nut is provided with a first conical structure protruding along the axial direction, one end of the anti-loose nut is provided with a second conical structure recessed along the axial direction, and the second conical structure is matched with the first conical structure; the conical surface of the first conical structure is provided with a first convex-concave rotation stopping structure, the conical surface of the second conical structure is provided with a second convex-concave rotation stopping structure, and the second convex-concave rotation stopping structure is matched with the first convex-concave rotation stopping structure. The utility model discloses an anti-loosening fastening assembly utilizes second convex-concave spline structure and first convex-concave spline structure cooperation spline, and restriction locknut pine moves back to reach complete locking effect.

Description

Anti-loosening fastening assembly

Technical Field

The utility model relates to a mechanical fastener technical field especially relates to an anti-loosening fastening assembly.

Background

Bolt-nut fasteners are essential parts for mechanical part connection and equipment fixation, and if the fastened objects are loosened, serious consequences may occur, such as bolt connection loosening of transmission mechanisms of airplanes, rails, machine tools and the like, which can cause serious accidents, so that prevention of bolt connection loosening is a subject of research. The loosening of the screw connection may be caused by a large number of reasons, such as in the case of strong vibrations, in the case of alternating loads, or in the case of large changes in operating temperature, which may lead to a reduction or elimination of positive pressure on the friction surfaces of the nut, resulting in loosening torques on the friction surfaces that urge the nut to rotate in the loosening direction, and thus in the loosening of the nut.

In order to achieve the purpose of preventing the nut from loosening, the existing Thangs thread fastener adopts two nuts with different screwing directions, namely a left-handed nut and a right-handed nut, and because the loosening direction of the right-handed nut is the screwing direction of the left-handed nut, when the right-handed nut loosens, the friction surface of the right-handed nut drives the left-handed nut to screw, so that the right-handed nut cannot loosen. However, the tang screw fastener is mainly dependent on the friction between the two nuts, and when the positive pressure on the friction surfaces of the two nuts is reduced or disappears due to the severe vibration of the fastened equipment, the left-handed nut may be loosened first, and then the right-handed nut may be loosened, so that the effect of complete looseness prevention cannot be achieved.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem or at least partially solve the technical problem, the utility model provides a locking fastening components that takes off that can reach complete locking effect.

The utility model provides a locking fastening assembly that takes off, including bolt, fastening nut and locknut, be equipped with first screw thread and second screw thread that crisscross each other and revolve to opposite on the bolt, the screw thread of fastening nut with the first screw thread phase-match, the screw thread of locknut with the second screw thread phase-match; one end of the fastening nut is provided with a first conical structure protruding along the axial direction, one end of the locknut is provided with a second conical structure recessed along the axial direction, the second conical structure is a hollow structure, and the second conical structure is matched with the first conical structure; the locking nut is characterized in that a first convex-concave rotation stopping structure is arranged on the conical surface of the first conical structure, a second convex-concave rotation stopping structure is arranged on the conical surface of the second conical structure, and the second convex-concave rotation stopping structure is matched with the first convex-concave rotation stopping structure to limit the loosening of the locking nut.

Optionally, the first convex-concave rotation stopping structure includes a plurality of rotation stopping grooves sequentially arranged on the conical surface of the first conical structure along the circumferential direction, the second convex-concave rotation stopping structure includes a plurality of rotation stopping protrusions sequentially arranged on the conical surface of the second conical structure along the circumferential direction, and the plurality of rotation stopping protrusions are correspondingly inserted into the plurality of rotation stopping grooves.

Optionally, the rotation stopping groove extends along the radial direction of the conical surface of the first conical structure, the inner wall surface of the rotation stopping groove is arc-shaped, the rotation stopping protrusion extends along the radial direction of the conical surface of the second conical structure, and the outer surface of the rotation stopping protrusion is arc-shaped.

Optionally, the first convex-concave rotation stopping structure includes a plurality of rotation stopping protrusions sequentially arranged on the conical surface of the first conical structure along the circumferential direction, the second convex-concave rotation stopping structure includes a plurality of rotation stopping grooves sequentially arranged on the conical surface of the second conical structure along the circumferential direction, and the plurality of rotation stopping protrusions are correspondingly inserted into the plurality of rotation stopping grooves.

Optionally, the rotation stopping protrusion extends along the radial direction of the conical surface of the first conical structure, the outer surface of the rotation stopping protrusion is arc-shaped, the rotation stopping groove extends along the radial direction of the conical surface of the second conical structure, and the inner wall surface of the rotation stopping groove is arc-shaped.

Optionally, the first tapered structure and the second tapered structure are equally tapered.

Optionally, the first conical structure is provided with a slit along the radial direction, and the slit penetrates through the inner wall surface of the first conical structure along the radial direction.

Optionally, the number of the cracks is multiple, and the multiple cracks are uniformly distributed along the circumferential direction of the first conical structure.

Optionally, the connecting portion of the screw rod of the bolt and the bolt head is provided with a tapered rotation stopping rib.

Optionally, the number of the rotation stopping ribs is at least two, and the rotation stopping ribs are uniformly distributed along the circumferential direction of the bolt.

The embodiment of the utility model provides a technical scheme compares with prior art and has following advantage:

the fastening assembly for preventing loosening provided by the embodiment of the utility model realizes the fastening of the two-way screw thread by connecting the fastening nut and the locknut with the screw thread on the two-way screw thread (the first screw thread and the second screw thread) of the bolt, and the loosening direction of the fastening nut is the screwing direction of the locknut, so that the locknut is utilized to limit the loosening of the fastening nut; the second convex-concave rotation stopping structure on the second conical structure of the locknut is matched with the first convex-concave rotation stopping structure on the first conical structure of the fastening nut to stop rotation, when the locknut is screwed in place, the second convex-concave rotation stopping structure can be matched with the first convex-concave rotation stopping structure to achieve the purpose of stopping rotation and limit the locknut to loosen in the loosening direction, so that even if the fastening equipment vibrates violently, the locknut cannot loosen in the loosening direction due to the limiting rotation stopping effect of the first convex-concave rotation stopping structure and the second convex-concave rotation stopping structure, and the effect of complete looseness prevention is achieved; in addition, because the bolt adopts the mutual crisscross two-way screw thread, consequently to the part of fastening of different thickness, lock nut homoenergetic is twisted the tight position of top or top to lock nut, and then reach complete locking effect, the suitability of locking fastening components that takes off has been improved, and compare in setting up the scheme of major axis footpath section and minor axis footpath section on the bolt and compare, can effectively guarantee the structural strength of bolt, thereby guarantee to adopt this locking fastening components that takes off to connect or joint strength when fixed equipment, moreover, the steam generator is simple in structure, joint strength is high, locking taking off is effectual.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive labor.

Fig. 1 is a schematic structural view of an anti-loose fastening assembly according to an embodiment of the present invention;

FIG. 2 is a schematic view of the fitting structure at A in FIG. 1;

fig. 3 is a schematic structural view of a bolt according to an embodiment of the present invention;

fig. 4 is a schematic front view of a fastening nut according to an embodiment of the present invention;

FIG. 5 is a schematic cross-sectional view taken along line B-B of FIG. 4;

FIG. 6 is a schematic top view of the fastening nut of FIG. 4;

fig. 7 is a schematic front view of the locknut according to an embodiment of the present invention;

FIG. 8 is a schematic cross-sectional view taken along line C-C of FIG. 7;

fig. 9 is a bottom view of the locknut shown in fig. 7.

Wherein, 1-bolt; 11-a first thread; 12-a second thread; 13-rotation stopping ribs; 2-fastening a nut; 21-a first conical structure; 211-a first male-female rotation stop structure; 212-rotation stop groove; 213-fracture; 3-a locknut; 31-a second tapered structure; 311-a second male-female rotation stopping structure; 312-rotation stop protrusions; 4 and 5-fastened devices.

Detailed Description

In order that the above objects, features and advantages of the present invention may be more clearly understood, the aspects of the present invention will be further described below. It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the invention may be practiced in other ways than those described herein; obviously, the embodiments in the specification are only a part of the embodiments of the present invention, and not all of the embodiments.

As shown in fig. 1 and 2, some embodiments of the present invention provide an anti-loose fastening assembly, including a bolt 1, a fastening nut 2 and a locknut 3, the bolt 1 is provided with a first thread 11 and a second thread 12 which are mutually staggered and have opposite rotation directions, the thread of the fastening nut 2 is matched with the first thread 11, the thread of the locknut 3 is matched with the second thread 12, one end of the fastening nut 2 is provided with a first tapered structure 21 protruding along an axial direction, one end of the locknut 3 is provided with a second tapered structure 31 recessed along the axial direction, the second tapered structure 31 is a hollow structure, and the second tapered structure 31 is matched with the first tapered structure 21; the first convex-concave rotation-stopping structure 211 is arranged on the conical surface of the first conical structure 21, the second convex-concave rotation-stopping structure 311 is arranged on the conical surface of the second conical structure 31, and the second convex-concave rotation-stopping structure 311 is matched with the first convex-concave rotation-stopping structure 211 to limit the loosening of the locknut 3.

Specifically, as shown in fig. 3, the bolt 1 is provided with a first thread 11 and a second thread 12 which are staggered with each other and have opposite rotation directions, that is, the threads on the bolt 1 are formed by compounding threads with left rotation and right rotation, preferably, the root of the first thread 11 is intersected with the root of the second thread 12, the crest of the first thread 11 is overlapped with the crest of the second thread 12, of course, the root and the crest of the first thread 11 and the second thread 12 may not be overlapped or intersected, and the thread pitch of the first thread 11 may be equal to or unequal to the thread pitch of the second thread 12. The first thread 11 on the bolt 1 and the thread of the fastening nut 2 have the same rotating direction and thread pitch parameters, so that the fastening nut 2 can be screwed in a matching way; the second thread 12 on the bolt 1 is consistent with the thread direction and the thread pitch parameters of the locknut 3, so that the locknut 3 can be screwed in a matching way. Bolt 1 wears to locate on fastened part 4 and 5, and the internal thread of fastening nut 2 matches the screw in to bolt 1 with bolt 1's first screw thread 11, and the internal thread of locknut 3 matches the screw in to bolt 1 with bolt 1's second screw thread 12 on to the top is tight or is pushed up to fastening nut 2 on, because locknut 3 and fastening nut 2's screw in opposite direction, fastening nut 2's the orientation of screwing in is locknut 3's orientation of screwing in, thereby utilizes locknut 3 to restrict fastening nut 2 pine and move back. However, the locknut 3 may be loosened due to severe vibration of the fastened device, and the like, and thus complete locking cannot be achieved.

In order to achieve the effect of complete anti-loosening, the utility model is characterized in that a first conical structure 21 protruding along the axial direction is arranged at one end of a fastening nut 2, a first convex-concave rotation stopping structure 211 is arranged on the conical surface of the first conical structure 21, a second conical structure 31 recessed along the axial direction is arranged at one end of the fastening nut 3, a second convex-concave rotation stopping structure 311 is arranged on the conical surface of the second conical structure 31, the second convex-concave rotation stopping structure 311 is matched with the first convex-concave rotation stopping structure 211 to stop rotation, when the fastening nut 3 is screwed in place, the second convex-concave rotation stopping structure 311 is matched with the first convex-concave rotation stopping structure 211 to achieve the purpose of rotation stopping, the loosening of the fastening nut 3 along the loosening direction is prevented, thereby achieving the effect of complete anti-loosening, even if the fastening equipment vibrates violently, because the limiting rotation stopping effect of the first convex-concave rotation stopping structure 211 and the second rotation stopping structure 311, the locknut 3 can not loosen along the loosening direction, thereby achieving the effect of complete looseness prevention.

In addition, because bolt 1 adopts the two-way screw thread that interlocks each other, consequently to the part of being fastened of different thickness, locknut 3 homoenergetic enough is screwed up the tight or position of jacking fastening nut 2, ensure first toper structure 21 and the cooperation of second toper structure 31, and then reach complete locking effect, fastening components's that takes off locking suitability has been improved, and compare in the scheme that sets up big footpath section and staff footpath section on bolt 1 and compare, can effectively guarantee bolt 1's structural strength, thereby guarantee the joint strength when adopting this locking fastening components of taking off to connect or fixed equipment, moreover, the steam generator is simple in structure, joint strength is high, locking taking off is effectual.

In some embodiments, as shown in fig. 4 to 6, the first male and female rotation stopping structure 211 includes a plurality of rotation stopping grooves 212 sequentially provided on the tapered surface of the first tapered structure 21 in the circumferential direction, and as shown in fig. 7 to 9, the second male and female rotation stopping structure 311 includes a plurality of rotation stopping protrusions 312 sequentially provided on the tapered surface of the second tapered structure 31 in the circumferential direction, and the plurality of rotation stopping protrusions 312 are correspondingly inserted into the plurality of rotation stopping grooves 212. Through setting up a plurality of matched with splines recess 212 and the arch 312 that splines, both can improve the precision that locknut 3 screwed for locknut 3 presses close to fastening nut 2 as far as possible in order to reach the effect that good restriction fastening nut 2 pine moved back, can improve the equilibrium of the fitting surface atress of locknut 3 and fastening nut 2 again, improves the utility model discloses an anti-loosening fastening components's structural strength.

Further, as shown in fig. 6, the rotation stop groove 212 extends in the radial direction of the tapered surface of the first tapered structure 21, the inner wall surface of the rotation stop groove 212 is circular arc-shaped, as shown in fig. 9, the rotation stop protrusion 312 extends in the radial direction of the tapered surface of the second tapered structure 31, and the outer surface of the rotation stop protrusion 312 is circular arc-shaped. When the locknut 3 is screwed, the whole locknut 3 moves towards the fastening nut along the axial direction, so that the plurality of rotation stopping protrusions 312 are correspondingly inserted into the plurality of rotation stopping grooves 212; spline protruding 312 and spline recess 212 adopt the arc of shape adaptation, and both be convenient for spline protruding 312 to insert smoothly in spline recess 212, reach locking purpose, can be through applying reverse spin power to locknut 3 again, will spline protruding 312 to deviate from spline recess 212 to realize that locknut 3 can dismantle, and then make the utility model discloses an anti-loosening fastening components easy dismounting.

It should be noted that, the depth of the rotation stopping groove 212 and the height of the rotation stopping protrusion 312 may be reasonably designed according to actual needs, the depth of the notch of the rotation stopping groove 212 is related to the fastening and anti-loosening effect, and in order to achieve a better anti-loosening effect, the depth of the notch of the rotation stopping groove 212 may be appropriately increased.

Of course, the positions of the rotation stop protrusions 312 and the rotation stop grooves 212 can be interchanged, that is, the rotation stop protrusions 312 are arranged on the first conical structure 21, and the rotation stop grooves 212 are arranged on the second conical structure 31, which can also achieve the above purpose. Specifically, the first male-female rotation stopping structure 211 includes a plurality of rotation stopping protrusions 312 sequentially provided on the tapered surface of the first tapered structure 21 in the circumferential direction, the second male-female rotation stopping structure 311 includes a plurality of rotation stopping grooves 212 sequentially provided on the tapered surface of the second tapered structure 31 in the circumferential direction, and the plurality of rotation stopping protrusions 312 are correspondingly inserted into the plurality of rotation stopping grooves 212. Further, the rotation stop protrusion 312 extends along the radial direction of the tapered surface of the first tapered structure 21, the outer surface of the rotation stop protrusion 312 is arc-shaped, the rotation stop groove 212 extends along the radial direction of the tapered surface of the second tapered structure 31, and the inner wall surface of the rotation stop groove 212 is arc-shaped.

In some embodiments, as shown in fig. 1, the tapers of the first tapered structure 21 and the second tapered structure 31 are equal to each other, so that matching is achieved, so that a larger contact area between the second tapered structure 31 and the first tapered structure 21 can be ensured, the second tapered structure 31 is ensured to hug the first tapered structure 21, and the effect of preventing looseness by the locknut 3 is improved. Of course, the taper of the first tapered structure 21 may be slightly larger than that of the second tapered structure 31, when the first tapered structure 21 is pressed by the second tapered structure 31 of the locknut 3, the first tapered structure 21 may generate a slight deformation, and the taper of the first tapered structure 21 and the taper of the second tapered structure 31 are forced to be substantially the same after the locknut 3 and the fastening nut 2 are tightened, so as to ensure that the second tapered structure 31 clasps the first tapered structure 21.

In order to ensure that the first conical structure 21 and the second conical structure 31 are in sufficient contact fit, as shown in fig. 1, after the locknut 3 is screwed in place, the conical surface of the first conical structure 21 contacts with the conical surface of the second conical structure 31, a gap is formed between the end surface of the locknut 3 located on the periphery of the second conical structure 31 and the end surface of the fastening nut 2 located on the periphery of the first conical structure 21, and a gap is formed between the inner bottom surface of the second conical structure 31 and the end surface of the first conical structure 21.

In some embodiments, as shown in FIG. 6, the first cone structure 21 is provided with a slit 213 along the radial direction, and the slit 213 penetrates the inner wall surface of the first cone structure 21 along the radial direction. The first conical structure 21 can be deformed moderately in the radial direction by providing the slits 213, so that the first conical structure 21 of the fastening nut 2 grips the bolt 1 better. Preferably, the number of the slits 213 is plural, and the plural slits 213 are uniformly distributed along the circumferential direction of the first tapered structure 21. Specifically, such a slit 213 is at least two and forms an arbitrary split form equal to or greater than two splits according to actual needs. Preferably, as shown in FIG. 6, the number of the slits 213 is three, and the first tapered structure 21 constitutes a three-split form.

As shown in fig. 1 and 4, a first tapered structure 21 is provided on an end surface of one end of the fastening nut 2, and the other end of the fastening nut 2 is a straight structure. Specifically, the other end of the fastening nut 2, which is in conformity with the end structure of a normal nut, is screwed toward the head of the bolt 1, and cooperates with the head of the bolt 1 to clamp the fastened devices 4 and 5.

As shown in fig. 1 and 7, a second tapered structure 31 is provided on an end surface of one end of the locknut 3, and the other end of the locknut 3 is a straight structure. Specifically, the other end of the locknut 3 is consistent with the end structure of a common nut, and the other end of the locknut 3 is not required to be matched with other parts and is processed into a straight structure, so that the locknut 3 is convenient to process.

As shown in fig. 6 and 9, the cross-sectional shapes of the fastening nut 2 and the locknut 3 are both regular polygons. Specifically, the cross-sectional shapes of the fastening nut 2 and the locknut 3 may be four corners, five corners, hexagonal or other shapes that facilitate tightening operations with a tool such as a wrench. Preferably, the cross-sectional dimensions of the fastening nut 2 and the locknut 3 are the same.

In some embodiments, the anti-loose fastening assembly of the present invention further comprises a first washer and a second washer, which are disposed between the bolt head of the bolt 1 and the fastening nut 2. Specifically, a first washer is provided between the fastened device 4, 5 and the bolt head of the bolt 1, and a second washer is provided between the fastened device 4, 5 and the fastening nut 2, so that the fastening assembly and the fastened device 4, 5 are prevented from being worn and loosened. The number of shims may be increased or decreased repeatedly, as desired.

As shown in fig. 3, a connecting portion between the screw shaft and the bolt head of the bolt 1 is provided with a tapered rotation preventing rib 13, the rotation preventing rib 13 is connected between an end surface of the bolt head facing the screw shaft and an outer side surface of the screw shaft, and a cross-sectional shape of the rotation preventing rib 13 in the axial direction is preferably a triangle or a triangle-like shape. The rotation stopping rib 13 is inserted into the threaded holes of the fastened equipment 4 and 5 to be in interference fit with the threaded holes, the bolt 1 is limited to rotate relative to the fastened equipment 4 and 5, and the rotation stopping effect is achieved. Specifically, the number of the rotation stopping ribs 13 is at least two, and at least two rotation stopping ribs 13 are uniformly distributed along the circumferential direction of the bolt 1. Preferably, the number of the rotation stopping ribs 13 is two, and the two rotation stopping ribs 13 are symmetrically arranged on two sides of the screw.

The utility model provides a fastening assembly for preventing loosening, which realizes the fastening of two-way threads by connecting fastening nuts and locknuts with opposite rotation directions on the two-way threads of a bolt in a threaded manner; after the locknut is screwed in place, the second convex-concave rotation stopping structure on the second conical structure of the locknut is matched with the first convex-concave rotation stopping structure on the first conical structure of the fastening nut to stop rotation, so that the locknut is limited from loosening along the loosening direction, even if the fastened equipment vibrates violently, the locknut cannot loosen along the loosening direction due to the limiting rotation stopping effect of the first convex-concave rotation stopping structure and the second convex-concave rotation stopping structure, and the effect of complete looseness prevention is achieved.

The above description is only exemplary of the invention, and is intended to enable those skilled in the art to understand and implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. The anti-loosening fastening assembly is characterized by comprising a bolt (1), a fastening nut (2) and a locknut (3), wherein a first thread (11) and a second thread (12) which are mutually staggered and have opposite screwing directions are arranged on the bolt (1), the thread of the fastening nut (2) is matched with the first thread (11), and the thread of the locknut (3) is matched with the second thread (12);

one end of the fastening nut (2) is provided with a first conical structure (21) protruding in the axial direction, one end of the locknut (3) is provided with a second conical structure (31) recessed in the axial direction, the second conical structure (31) is a hollow structure, and the second conical structure (31) is matched with the first conical structure (21);

the locking nut is characterized in that a first convex-concave rotation stopping structure (211) is arranged on the conical surface of the first conical structure (21), a second convex-concave rotation stopping structure (311) is arranged on the conical surface of the second conical structure (31), and the second convex-concave rotation stopping structure (311) is matched with the first convex-concave rotation stopping structure (211) to limit the loosening of the locking nut (3).

2. The anti-loosening fastening assembly according to claim 1, wherein the first male and female rotation-stopping structure (211) comprises a plurality of rotation-stopping grooves (212) sequentially arranged on the conical surface of the first conical structure (21) along the circumferential direction, the second male and female rotation-stopping structure (311) comprises a plurality of rotation-stopping protrusions (312) sequentially arranged on the conical surface of the second conical structure (31) along the circumferential direction, and the plurality of rotation-stopping protrusions (312) are correspondingly inserted into the plurality of rotation-stopping grooves (212).

3. The loosening-prevention fastening assembly according to claim 2, wherein the rotation-stopping groove (212) extends in a radial direction of the tapered surface of the first tapered structure (21), an inner wall surface of the rotation-stopping groove (212) is in a circular arc shape, the rotation-stopping protrusion (312) extends in the radial direction of the tapered surface of the second tapered structure (31), and an outer surface of the rotation-stopping protrusion (312) is in a circular arc shape.

4. The anti-loosening fastening assembly according to claim 1, wherein the first male and female rotation-stopping structure (211) comprises a plurality of rotation-stopping protrusions (312) sequentially arranged on the conical surface of the first conical structure (21) along the circumferential direction, the second male and female rotation-stopping structure (311) comprises a plurality of rotation-stopping grooves (212) sequentially arranged on the conical surface of the second conical structure (31) along the circumferential direction, and the plurality of rotation-stopping protrusions (312) are correspondingly inserted into the plurality of rotation-stopping grooves (212).

5. The loosening-prevention fastening assembly according to claim 4, wherein the rotation-stopping protrusion (312) extends in a radial direction of the tapered surface of the first tapered structure (21), the outer surface of the rotation-stopping protrusion (312) is in a circular arc shape, the rotation-stopping groove (212) extends in a radial direction of the tapered surface of the second tapered structure (31), and the inner wall surface of the rotation-stopping groove (212) is in a circular arc shape.

6. The anti-release fastening assembly according to any one of claims 1 to 5, wherein the first tapered structure (21) and the second tapered structure (31) are equally tapered.

7. The anti-release fastening assembly according to any one of claims 1 to 5, characterized in that the first cone-shaped structure (21) is provided with a slit (213) in the radial direction, the slit (213) penetrating the inner wall surface of the first cone-shaped structure (21) in the radial direction.

8. The anti-release fastening assembly according to claim 7, characterized in that the number of the slits (213) is plural, and a plurality of the slits (213) are uniformly distributed along the circumference of the first tapered structure (21).

9. The anti-loosening fastening assembly according to any one of claims 1 to 5, wherein the connecting portion of the screw rod and the bolt head of the bolt (1) is provided with a wedge-shaped anti-rotation rib (13).

10. The anti-loosening fastening assembly according to claim 9, wherein the number of the anti-rotation ribs (13) is at least two, and at least two anti-rotation ribs (13) are uniformly distributed along the circumferential direction of the bolt (1).

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