Anti-loosening mechanism

Abstract

The invention discloses an anti-loosening mechanism, comprising an anti-loosening nut and an anti-loosening washer, wherein the anti-loosening nut and the anti-loosening washer cooperate with each other through a spiral inclined surface, so that an anti-loosening resistance torque is generated between the anti-loosening nut and the anti-loosening washer. The invention overcomes the loosening torque generated by mechanical vibration, has a good anti-loosening effect, and has a simple structure, low production cost, and is easy to operate, and is suitable for large-scale promotion and application.

Description

Technical Field

[0001] The invention belongs to the field of mechanical technology, and in particular relates to an anti-loosening mechanism. Background Art

[0002] In the use occasions where fasteners are needed, such as running trains, vibrating electromechanical equipment, nuclear power pipelines that need to be firmly connected, glass curtain wall fixing bolts of high-rise buildings, etc., mechanical vibration may cause the fasteners to loosen. The loose fasteners cause safety hazards and require regular maintenance. The existing anti-loosening technology mainly includes spring washers, double disc washers, double nut structures, plastic washers with interference fit, etc. The above anti-loosening mechanism has its advantages and disadvantages. It is conditional and limited anti-loosening, and the thread is damaged during vibration. It cannot be reused. For example, the Chinese invention patent with the authorization announcement number CN1107170C discloses a loosening prevention nut, which includes a tool mounting part and an annular protrusion coaxially protruding upward from the tool mounting part, and a threaded hole is provided through the tool mounting part and the protrusion. A plurality of longitudinal grooves are formed in the circumferential direction of the outer circumference side of the protrusion, and at least one section of the sections formed between the longitudinal grooves is deformed by radial inward pressure, so that the aperture of the threaded hole is slightly reduced. When the invention is used, pressure deformation is generated, which slightly reduces the diameter of the threaded hole to achieve locking. Therefore, the anti-loosening nut can only be used once and cannot be reused. The Chinese invention patent with the authorization announcement number CN102410296B discloses an anti-loosening and anti-removal nut, including a front nut and a rear nut, the front nut and the rear nut are a homogeneous integral structure, a U-shaped or V-shaped first groove is provided between the front nut and the rear nut, a first collapse ring is formed between the bottom of the first groove and the internal thread, and the collapse torque of the first collapse ring is less than the collapse torque of the screw matched with the nut. When the front nut and the rear nut of the invention are tightened together, the bottom of the first groove between the front nut and the rear nut is broken, and the first collapse ring of the nut after the break is deformed, the integrity of the inner thread of the nut is destroyed, and at the same time, part of the outer thread on the screw that matches the inner thread is also deformed due to being squeezed, and a completely "bite-locked" structure appears between the nut and the screw. This "bite-locked" structure destroys the thread matching relationship between the nut and the screw, making it difficult for the front and rear nuts, especially the front nut, to be withdrawn from the screw, thereby playing a role in preventing loosening and unloading. The invention is based on the premise of destroying the thread during use, and is difficult to disassemble and cannot be reused at all. Therefore, the anti-loosening nuts of the prior art have the problems of complex structure, non-reusability, and high cost. Summary of the invention

[0003] The technical problem solved by the present invention is as follows: The present invention provides an anti-loosening mechanism with a simple structure, good anti-loosening effect and low production cost.

[0004] Technical solution: In order to solve the above technical problems, the technical solution adopted by the present invention is as follows:

[0005] An anti-loosening mechanism comprises an anti-loosening nut and an anti-loosening washer, wherein the anti-loosening nut and the anti-loosening washer cooperate with each other via a spiral bevel, so that an anti-loosening resistance torque is generated between the anti-loosening nut and the anti-loosening washer, and anti-slip teeth are arranged on the end surface of the anti-loosening washer opposite to the spiral bevel, the anti-slip teeth are evenly arranged, the end surface of each anti-slip tooth is a plane, and the anti-slip teeth are in contact with the component they fasten.

[0006] Preferably, the inner wall of the anti-loosening nut is provided with an internal thread, and the inner wall of the anti-loosening washer is a smooth surface.

[0007] Preferably, the inner diameter of the through hole of the anti-loosening washer is larger than the inner diameter of the through hole of the anti-loosening nut.

[0008] Preferably, the cross-sections of the anti-loosening nut and the anti-loosening washer are polygonal.

[0009] Preferably, the cross-sections of the anti-loosening nut and the anti-loosening washer are regular polygons.

[0010] Preferably, the end of the spiral bevel is provided with a section perpendicular to the end line of the spiral bevel, and the sections of the spiral bevels of the anti-loosening nut and the anti-loosening washer are connected.

[0011] Preferably, after the anti-loosening nut and the anti-loosening washer are installed in cooperation, a gap is left between the cross-sections of the spiral bevel.

[0012] Beneficial effects: Compared with the prior art, the present invention has the following advantages:

[0013] (1) Simple structure, good anti-loosening effect, low production cost and easy operation;

[0014] (2) The anti-loosening resistance torque is generated by the spiral bevel cooperation between the anti-loosening nut and the anti-loosening washer of the present invention. If the anti-loosening state is to be released, the loosening torque must be manually applied to release it, thus overcoming the loosening torque caused by mechanical vibration, and preventing loosening reliably;

[0015] (3) The anti-loosening mechanism of the present invention has no special requirements for the screw part, and it only needs to meet the 8.8 level.

[0016] (4) The anti-loosening mechanism of the present invention can be installed not only using a special wrench but also using an ordinary wrench, making the construction more convenient and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a perspective view of the interior of the anti-loosening mechanism;

[0018] Figure 2 This is a perspective view of the interior of the anti-loosening mechanism from the front;

[0019] Figure 3 It is a schematic diagram of the external structure of the anti-loosening mechanism;

[0020] Figure 4 This is a top view of the anti-slip teeth of the anti-loosening mechanism;

[0021] Figure 5 This is a top view of the anti-loosening nut of the anti-loosening mechanism;

[0022] Figure 6 yes Figure 3 AA section view;

[0023] Figure 7 It is a schematic diagram of the structure after the anti-loosening mechanism is installed. DETAILED DESCRIPTION

[0024] The present invention is further illustrated below in conjunction with specific examples. The examples are implemented based on the technical solutions of the present invention. It should be understood that these examples are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0025] like Figure 1-6 As shown, the anti-loosening mechanism of the present application mainly comprises an anti-loosening nut 1 and an anti-loosening washer 3. By utilizing the principle of inclined plane rising angle, the anti-loosening nut 1 and the anti-loosening washer 3 are provided with mutually cooperating spiral inclined planes 2. The spiral inclined planes 2 cooperate with each other to generate an anti-loosening resistance torque. The anti-loosening resistance torque cannot disappear without manual release, and therefore has a good anti-loosening effect.

[0026] The end of the spiral bevel 2 is provided with a section 9 perpendicular to the end line of the spiral bevel 2 , and the sections 9 of the spiral bevel 2 of the anti-loosening nut 1 and the anti-loosening washer 3 are connected.

[0027] The anti-skid teeth 4 are arranged on the end face of the anti-loosening washer 3 opposite to the spiral bevel. The anti-skid teeth 4 are evenly arranged, and the end face of each anti-skid tooth 4 is a plane. The anti-skid teeth 4 can contact the parts they fasten to increase friction and further prevent loosening.

[0028] Both the anti-loosening nut 1 and the anti-loosening washer 3 are provided with through holes in the center, and the inner diameter of the through hole of the anti-loosening washer 3 is larger than the inner diameter of the through hole of the anti-loosening nut 1; and after installation, the through holes of the two are coaxial, the inner wall of the through hole of the anti-loosening nut 1 is provided with an internal thread 5, and the inner wall of the through hole of the anti-loosening washer 3 is a smooth surface 6.

[0029] 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 used.

[0030] After the anti-loosening nut 1 and the anti-loosening washer 3 are installed together, a gap 8 is left at the connection of the spiral bevel 2, that is, a gap 8 is left between the cross sections 9 of the spiral bevel 2, so as to form a resistance torque and achieve an anti-loosening effect.

[0031] The anti-loosening mechanism of the present invention has been tested for 5 million times and its performance remains unchanged, and the anti-loosening effect is excellent.

[0032] The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An anti-loosening mechanism, characterized in that: include: A locking nut (1) and a locking washer (3), wherein the locking nut (1) and The anti-loosening washers (3) cooperate with each other through the spiral bevel (2), so that an anti-loosening resistance torque is generated between the anti-loosening nut (1) and the anti-loosening washer (3), and the end surface of the anti-loosening washer (3) opposite to the spiral bevel is provided with anti-slip teeth (4), the anti-slip teeth (4) are evenly arranged, the end surface of each anti-slip tooth (4) is a plane, and the anti-slip teeth (4) are in contact with the parts they are fastened to; The inner wall of the through hole of the anti-loosening nut (1) is provided with an internal thread (5), and the inner wall of the through hole of the anti-loosening washer (3) is a smooth surface (6); The inner diameter of the through hole of the anti-loosening washer (3) is larger than the inner diameter of the through hole of the anti-loosening nut (1); The end of the spiral bevel (2) is provided with a section (9) perpendicular to the end line of the spiral bevel (2), and the sections (9) of the spiral bevel (2) of the anti-loosening nut (1) and the anti-loosening washer (3) are connected; After the anti-loosening nut (1) and the anti-loosening washer (3) are assembled together, a gap (8) is left between the cross sections (9) of the spiral bevel (2); The cross sections of the anti-loosening nut (1) and the anti-loosening washer (3) are polygonal.

2. The anti-loosening mechanism according to claim 1, characterized in that: The cross sections of the anti-loosening nut (1) and the anti-loosening washer (3) are regular polygons.

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