CN217761642U

CN217761642U - Novel locking levogyration bolt structure

Info

Publication number: CN217761642U
Application number: CN202121661825.XU
Authority: CN
Inventors: 屈波
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-07-21
Filing date: 2021-07-21
Publication date: 2022-11-08
Anticipated expiration: 2031-07-21

Abstract

The utility model discloses a novel anti-loosening left-handed bolt structure, which comprises a high-strength bolt, wherein the end part of the high-strength bolt is sequentially sleeved with a gasket, a pre-tightening nut, an adjusting gasket and a locking nut; the high-strength bolt is characterized in that a connecting portion is arranged at the end portion of the high-strength bolt, a small-diameter connecting portion is arranged at the end portion of the connecting portion, threads are arranged on the outer side of the connecting portion, and small-diameter threads are arranged on the outer side of the small-diameter connecting portion. Compared with the prior art, the utility model the advantage lie in: the structure is simple, the use is convenient, and the design of the pre-tightening nut and the locking nut can effectively prevent the high-strength bolt from loosening, so that the aim of preventing the bolt from fatigue fracture due to loosening is fulfilled, and equipment damage and huge economic loss caused by loosening and fracture of the bolt are avoided; the shape and the size can be determined according to different design conditions, and the applicability is wider. Has strong practicability and market popularization value.

Description

Novel locking levogyration bolt structure

Technical Field

The utility model relates to a bolt technical field specifically indicates a novel locking levogyration bolt structure.

Background

With the further comprehensive promotion of domestic economy, the development of aviation, high-speed rail, metallurgy, wind power, hydropower, large-scale engineering machinery and the like is rapid. The equipment required by various industries is vigorous. Wherein these large and small devices are not detachable from high strength bolts. High strength bolts do not function as well in normal operation of the equipment. However, the bolt is often loosened due to the severe vibration of the equipment, complicated stress and other factors during the use process. The fatigue fracture is caused, the large-scale equipment is seriously damaged, huge economic loss is brought to enterprises, and great potential safety hazards are brought to the life guarantee of staff. According to the long-term research and analysis of the equipment experts on the fracture reasons of the bolts, the conclusion is that more than 80 percent of the real reasons of the bolt failure are caused by bolt loosening. Because the bolt, once loosened, generates a great deal of energy which acts directly on the bolt and the equipment. Eventually causing the bolt to fail by fatigue fracture. Then, the bolt is "not loosen and keeps continuous, and breaks as soon as loosening".

Therefore, a new structure which has reliability and simple operation and can prevent the bolt from loosening needs to be researched.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problem mentioned in the background art, a novel locking levogyration bolt structure is provided.

In order to solve the technical problem, the utility model provides a technical scheme does: a novel anti-loosening left-handed bolt structure comprises a high-strength bolt, wherein a gasket, a pre-tightening nut, an adjusting gasket and a locking nut are sequentially sleeved at the end part of the high-strength bolt;

the end part of the high-strength bolt is provided with a connecting part, the end part of the connecting part is provided with a small-diameter connecting part, the outer side of the connecting part is provided with a thread, the outer side of the small-diameter connecting part is provided with a small-diameter thread, a right-handed thread matched with the thread is arranged in the pre-tightening nut, a left-handed thread matched with the small-diameter thread is arranged in the locking nut, and the diameter of the small-diameter thread is smaller than the bottom diameter of the thread;

the inner diameter of the adjusting shim is larger than the small-diameter thread, and the inner diameter of the adjusting shim is smaller than the thread.

Preferably, the pre-tightening nut is a right-handed nut.

Preferably, the locking nut is a left-handed small-diameter nut.

Compared with the prior art, the utility model the advantage lie in: the structure is simple, the use is convenient, and the design of the pre-tightening nut and the locking nut can effectively prevent the high-strength bolt from loosening, so that the aim of preventing the bolt from fatigue fracture due to loosening is fulfilled, and equipment damage and huge economic loss caused by loosening and fracture of the bolt are avoided; the appearance and the size can be determined according to different design conditions, and the applicability is wider. Has strong practicability and market popularization value.

Drawings

Fig. 1 is a schematic sectional structure of the present invention.

Fig. 2 is a use state diagram of the present invention.

Fig. 3 is a schematic structural diagram of the locking nut of the present invention.

Fig. 4 is a schematic structural diagram of the adjusting shim according to the present invention.

Fig. 5 is a schematic diagram of the mechanism of the pre-tightening nut of the present invention.

Fig. 6 is a schematic structural diagram of the gasket of the present invention.

Fig. 7 is a schematic structural view of the high-strength bolt of the present invention.

As shown in the figure: 1. the bolt comprises a locking nut, 2, an adjusting gasket, 3, a pre-tightening nut, 4, a gasket, 5, a high-strength bolt, 501, a connecting part, 502, a small-diameter connecting part, 5011, threads, 5022 and small-diameter threads.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "front", "back" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the resulting manner or original must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; the connection can be mechanical connection or point connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

With the combination of the attached drawings, the novel anti-loosening left-handed bolt structure comprises a high-strength bolt 5, wherein a gasket 4, a pre-tightening nut 3, an adjusting gasket 2 and a locking nut 1 are sequentially sleeved at the end part of the high-strength bolt 5;

the end part of the high-strength bolt 5 is provided with a connecting part 501, the end part of the connecting part 501 is provided with a small-diameter connecting part 502, the outer side of the connecting part 501 is provided with a thread 5011, the outer side of the small-diameter connecting part 502 is provided with a small-diameter thread 5022, a right-handed thread matched with the thread 5011 in use is arranged in the pre-tightening nut 3, a left-handed thread matched with the small-diameter thread 5022 in use is arranged in the locking nut 1, and the diameter of the small-diameter thread 5022 is smaller than the bottom diameter of the thread 5011;

the inner diameter of the adjustment shim 2 is greater than the small-diameter thread 5022, and the inner diameter of the adjustment shim 2 is less than the thread 5011.

The pre-tightening nut 3 is a right-handed nut.

The locking nut 1 is a left-handed small-diameter nut.

When the utility model is implemented, the nut is pre-tightened according to the preset pre-tightening torque according to the diameter of the bolt thread; placing an adjusting gasket; ensuring that one part of the adjusting gasket is arranged on the right-handed thread of the bolt and the other part of the adjusting gasket is arranged on the left-handed thread of the bolt; and (4) tightening the locking nut according to the set pre-tightening torque.

The utility model discloses a theory of operation: under the severe working environment, when the high-strength bolt is subjected to severe vibration and bears huge alternating load, the pre-tightening nut may be loosened at the moment and has a left-handed tendency. At this time, the pre-tightening nut transmits the left-handed force to the locking nut through the adjusting gasket. Because the locknut is a left-handed thread, when the locknut is subjected to left-handed force, the locknut can apply a force to the adjusting gasket in turn under the action of the helix angle, then the force is transmitted to the pre-tightening nut, and the force is opposite to the left-handed force to be loosened by the pre-tightening nut, so that the loosening of the pre-tightening nut is inhibited, and the purpose of preventing the bolt from loosening is achieved.

The present invention and the embodiments thereof have been described above, but the description is not limited thereto, and the embodiment shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should understand that they should not be limited to the embodiments described above, and that they can design the similar structure and embodiments without departing from the spirit of the invention.

Claims

1. The utility model provides a novel locking levogyration bolt structure, includes high strength bolt, its characterized in that: the end part of the high-strength bolt is sequentially sleeved with a gasket, a pre-tightening nut, an adjusting gasket and a locking nut;

2. The novel anti-loosening left-handed bolt structure according to claim 1, characterized in that: the pre-tightening nut is a right-handed nut.

3. The novel anti-loosening left-handed bolt structure according to claim 1, characterized in that: the locking nut is a left-handed small-diameter nut.