CN112628273A

CN112628273A - Anti-loosening mechanism

Info

Publication number: CN112628273A
Application number: CN202011415404.9A
Authority: CN
Inventors: 李博识
Original assignee: Jiangsu Yuanxing Group Construction Co ltd
Current assignee: Jiangsu Yuanxing Group Construction Co ltd
Priority date: 2020-12-04
Filing date: 2020-12-04
Publication date: 2021-04-09

Abstract

The invention discloses a locking mechanism which comprises a locking nut and a locking washer, wherein the locking nut and the locking washer are matched with each other through a spiral inclined surface, so that anti-loosening resistance torque is generated between the locking nut and the locking washer. The invention overcomes the loosening torque generated by mechanical vibration and has good loosening-proof effect; and the structure is simple, the production cost is low, the operation is easy, and the method is suitable for large-scale popularization and application.

Description

Anti-loosening mechanism

Technical Field

The invention belongs to the technical field of machinery, and particularly relates to a locking mechanism.

Background

In the use occasions needing fasteners, such as running trains, vibrating electromechanical equipment, nuclear power pipelines needing to be stably connected, glass curtain wall fixing bolts of high-rise buildings and the like, the problem of fastener loosening caused by mechanical vibration can be solved, the fastener loosening causes potential safety hazards, frequent maintenance is needed, the existing anti-loosening technology mainly comprises spring washers, double-disc washers, double-nut structures, plastic cushions in interference fit and the like, the anti-loosening mechanism has the advantages and the disadvantages of conditional and limited anti-loosening, damage to threads during vibration and incapability of being reused, for example, chinese patent application No. CN1107170C discloses a locknut including a tool mounting portion and an annular projecting portion projecting coaxially upward from the tool mounting portion, and a threaded hole is provided through the tool mounting portion and the projecting portion. A plurality of longitudinal grooves are formed in the circumferential direction on the outer circumferential side of the protruding portion, and at least one of the sections formed between the longitudinal grooves is deformed with radially inward pressing force so that the diameter of the threaded hole is slightly reduced. When the locknut is used, pressure deformation is generated, the hole diameter of the threaded hole is slightly reduced, and locking is achieved, so that the locknut can be used only once and cannot be reused. The patent of the invention, chinese patent with granted publication number CN102410296B, discloses an anti-loose and anti-removal nut, which comprises a front nut and a rear nut, wherein the front nut and the rear nut are of a homogeneous integral structure, a U-shaped or V-shaped first groove is arranged between the front nut and the rear nut, a first torsional ring is formed between the groove bottom of the first groove and an internal thread, and the torsional moment of the first torsional ring is smaller than that of a screw rod matched with the nut. When the front nut and the rear nut are tightly combined, because the groove bottom of the first groove between the front nut and the rear nut is fractured, the first torsional ring of the fractured nut is deformed, the integrity of the internal thread of the nut is damaged, and meanwhile, part of external threads on the screw matched with the internal thread are also deformed due to extrusion, a complete 'seizing' structure is formed between the nut and the screw, the 'seizing' structure destroys the thread matching relationship between the nut and the screw, so that the front nut and the rear nut, particularly the front nut, are difficult to withdraw from the screw, and the anti-loosening and anti-unloading effects are achieved. When in use, the invention is based on the premise of destroying the screw thread, is difficult to disassemble and can not be reused at all. Therefore, the locknut in the prior art has the problems of complex structure, incapability of being repeatedly used and high cost.

Disclosure of Invention

The technical problems solved by the invention are as follows: the invention provides a locking mechanism which is simple in structure, good in locking effect and low in production cost.

The technical scheme is as follows: in order to solve the technical problems, the technical scheme adopted by the invention is as follows:

the utility model provides a locking mechanism, includes locknut and lock washer, mutually support through the spiral inclined plane between locknut and the lock washer, make to produce locking take off resistance moment of torsion between locknut and the lock washer the terminal surface relative with the spiral inclined plane on the lock washer is provided with anti-skidding tooth, and anti-skidding tooth evenly sets up, and the terminal surface of every anti-skidding tooth is the plane, and anti-skidding tooth contacts rather than the part of fastening.

Preferably, the inner wall of the locknut is provided with an internal thread, and the inner wall of the lock washer is a smooth surface.

Preferably, the inner diameter of the through hole of the lockwasher is larger than that of the through hole of the locknut.

Preferably, the cross sections of the locknut and the lockwasher are polygonal.

Preferably, the cross sections of the locknut and the lockwasher are regular polygons.

Preferably, the end part of the spiral inclined plane is provided with a section perpendicular to the end line of the spiral inclined plane, and the sections of the spiral inclined planes of the locknut and the lockwasher are connected.

Preferably, after the locknut and the lockwasher are installed in a matched mode, a gap is reserved between the sections of the spiral inclined surfaces.

Has the advantages that: compared with the prior art, the invention has the following advantages:

(1) the structure is simple, the anti-loosening effect is good, the production cost is low, and the operation is easy;

(2) the anti-loosening nut and the anti-loosening washer are matched through the spiral inclined surface to generate anti-loosening resistance torque, if the anti-loosening state is to be released, the loosening torque must be manually applied to release the anti-loosening state, so that the loosening torque generated by mechanical vibration is overcome, and the anti-loosening is reliable;

(3) the anti-loosening mechanism has no special requirement on the screw part, and can meet 8.8 levels.

(4) The anti-loosening mechanism can be installed by using a special wrench and a common wrench, and is more convenient and reliable to construct.

Drawings

FIG. 1 is an internal perspective view of the anti-loosening mechanism;

FIG. 2 is a front inside perspective view of the anti-loosening mechanism;

FIG. 3 is a schematic view of the external structure of the anti-loosening mechanism;

FIG. 4 is a top view of the anti-slip teeth of the anti-loosening mechanism;

FIG. 5 is a top view of the locknut of the locking mechanism;

FIG. 6 is a sectional view taken along line A-A of FIG. 3;

fig. 7 is a schematic structural view of the anti-loosening mechanism after installation.

Detailed Description

The present invention will be further illustrated by the following specific examples, which are carried out on the premise of the technical scheme of the present invention, and it should be understood that these examples are only for illustrating the present invention and are not intended to limit the scope of the present invention.

As shown in fig. 1 to 6, the main components of the anti-loosening mechanism of the present application are an anti-loosening nut 1 and an anti-loosening washer 3, and by using the principle of the inclined plane elevation angle, the anti-loosening nut 1 and the anti-loosening washer 3 are provided with mutually matched spiral inclined planes 2, and are matched with each other through the spiral inclined planes 2 to generate anti-loosening resistance torque, which cannot disappear without manual release, thereby having good anti-loosening effect.

The end part of the spiral inclined plane 2 is provided with a section 9 vertical to the end line of the spiral inclined plane 2, and the locknut 1 is connected with the section 9 of the spiral inclined plane 2 of the lockwasher 3.

The anti-slip teeth 4 are arranged on the end face, opposite to the spiral inclined face, of the anti-slip washer 3, the anti-slip teeth 4 are evenly arranged, the end face of each anti-slip tooth 4 is a plane, the anti-slip teeth 4 can be in contact with parts fastened with the anti-slip teeth, friction force is increased, and loosening is further prevented.

The locknut 1 and the lockwasher 3 are both provided with through holes at the centers, and the inner diameter of the through hole of the lockwasher 3 is larger than that of the through hole of the locknut 1; and the through holes of the locknut and the lockwasher are coaxial after installation, the inner wall of the through hole of the locknut 1 is provided with an internal thread 5, and the inner wall of the through hole of the lockwasher 3 is a smooth surface 6.

In order to facilitate the installation operation, the cross sections of the locknut 1 and the lockwasher 3 are polygonal, that is, the outer surfaces 7 of the locknut 1 and the lockwasher 3 are polygonal, and regular polygons are preferably adopted.

After the locknut 1 and the lockwasher 3 are installed in a matching mode, a gap 8 is reserved at the joint of the spiral inclined plane 2, namely the gap 8 is reserved between the sections 9 of the spiral inclined plane 2. So as to form resistance torque and achieve the anti-loosening effect.

The anti-loosening mechanism disclosed by the invention is subjected to anti-loosening detection for 500 ten thousand times, the performance is still unchanged, and the anti-loosening effect is excellent.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements should also be considered as the protection scope of the present invention.

Claims

1. A loosening prevention mechanism, comprising: locknut (1) and lock washer (3), mutually support through spiral inclined plane (2) between locknut (1) and the lock washer (3), make and produce the anti-loosening resistance moment of torsion between locknut (1) and lock washer (3) the terminal surface relative with the spiral inclined plane on lock washer (3) is provided with antiskid tooth (4), and antiskid tooth (4) evenly set up, and the terminal surface of every antiskid tooth (4) is the plane, and antiskid tooth (4) contact rather than the part of fastening.

2. The anti-loosening mechanism of claim 1, wherein: the through-hole inner wall of locknut (1) is provided with internal thread (5), the through-hole inner wall of lock washer (3) is smooth surface (6).

3. The anti-loosening mechanism of claim 1, wherein: the inner diameter of the through hole of the anti-loosening washer (3) is larger than that of the through hole of the anti-loosening nut (1).

4. The anti-loosening mechanism of claim 1, wherein: the cross sections of the locknut (1) and the lockwasher (3) are polygonal.

5. The anti-loosening mechanism of claim 4, wherein: the cross sections of the locknut (1) and the lockwasher (3) are regular polygons.

6. The anti-loosening mechanism of claim 1, wherein: the end part of the spiral inclined plane (2) is provided with a section (9) which is vertical to the end line of the spiral inclined plane (2), and the section (9) of the spiral inclined plane (2) of the locknut (1) and the lockwasher (3) are connected.

7. The anti-loosening mechanism of claim 6, wherein: after the locknut (1) and the lockwasher (3) are installed in a matched mode, a gap (8) is reserved between the sections (9) of the spiral inclined planes (2).