Fastener anti-loosening scheme

Abstract

According to the anti-loosening scheme, a nut, a bolt and a stop sleeve which are matched with one another are included, the bolt comprises a threaded part and a stop matching part which are matched with the nut, the stop sleeve is contained in an inner cavity of the nut in a matched mode, and an inner hole (cavity) of the stop sleeve is matched with the stop matching part. Through cooperation of the nut, the bolt and the stop sleeve, the nut is locked at the needed position, and the beneficial effect of preventing the nut from loosening is achieved. The fastening piece is simple in structure and convenient to use, the manufacturing work requirement is lowered, the maintenance cost is reduced, the stability of the fastening piece is enhanced, and practicability is high.

Description

Technical Field

[0001] The invention relates to the technical field of bolts, in particular to a fastener for preventing loosening. Background Art

[0002] Bolts are a kind of mechanical parts, cylindrical threaded fasteners equipped with nuts. A type of fastener consisting of a head and a screw, which needs to be matched with a nut to fasten and connect two parts with through holes. High-speed machines will produce continuous vibrations of varying degrees. During long-term machine operation, vibrations will cause the bolts and nuts used to fasten the machine to loosen, and loose nuts and bolts may cause serious accidents such as machine damage and death. Therefore, nut loosening is a very important issue in the field of machinery. Now, researchers from various countries are actively studying bolts with simple structures that can prevent loosening, in order to avoid accidents such as machine damage and death, which will cause a large amount of human and financial losses.

[0003] Therefore, a bolt with a simple structure that can prevent loosening is in urgent need of research and solution. Summary of the invention

[0004] In order to solve the above technical problems, the technical solution provided by the present invention is: a fastener for preventing loosening, comprising a nut, a bolt, and a stop sleeve that cooperate with each other, the bolt comprising a threaded portion and a stop fitting portion that cooperate with the nut, the inner cavity of the nut having a portion that cooperates with and accommodates the stop sleeve, and the stop sleeve is coaxially arranged with an inner hole (cavity) that cooperates with the stop portion.

[0005] As an improvement, the threaded portion is arranged between the stop fitting portion and the bolt head.

[0006] As an improvement, the inner cavity of the nut has a portion that matches and accommodates the stop sleeve.

[0007] As an improvement, the stop sleeve has an inner hole (cavity) that matches the stop fitting portion.

[0008] As an improvement, the diameter of the stop fitting portion is smaller than the diameter of the threaded portion.

[0009] After adopting the above structure, the present invention has the following advantages: the present invention locks the nut in the desired position through the cooperation of the nut, bolt and stop sleeve, thereby achieving the beneficial effect of preventing the nut from loosening. The present invention has a simple structure and is easy to use. It not only reduces the production requirements and maintenance costs, but also enhances the stability of the fastener and has strong practicality. In addition, the nut and the stop sleeve can be designed with additional adjustability, the main purpose of which can be to prevent the stop sleeve from falling out to ensure the stability of the fastener under various working conditions, and can also be convenient for installation and disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1It is a structural schematic diagram of a fastener anti-loosening solution of the present invention.

[0011] Figure 2 It is a structural schematic diagram of a nut of a fastener anti-loosening solution of the present invention.

[0012] Figure 3 It is a structural schematic diagram of a bolt in a fastener anti-loosening solution of the present invention.

[0013] Figure 4 It is a structural schematic diagram of a stop sleeve of a fastener anti-loosening solution of the present invention.

[0014] Figure 5 It is an additional adjustable design, the purpose is to prevent the stop sleeve from axially dislodging, and it can be designed in a variety of ways according to the use environment. The additional adjustable design depends on the use environment. The design purpose in the figure is to prevent the stop sleeve from axially dislodging. Additional adjustable design is not the main part of anti-loosening, but it is also indispensable. There are too many ways to implement it, and this document only lists three examples.

[0015] Figure 6 This is a real part diagram of the hole-slot matching type (additional adjustable design) of the present invention Slot-fit solid parts (without fuse) As shown in the figure: 1. Nut, 1.1. Inner cavity, 2. Bolt, 2.1. Threaded part, 2.2. Stop fitting part, 3. Stop sleeve, 3.1. Inner hole (cavity) DETAILED DESCRIPTION

[0016] Combined with Figures 1 to 4 A fastener for preventing loosening includes a nut 1, a bolt 2, and a stop sleeve 3 that cooperate with each other. The bolt 2 includes a threaded portion 2.1 and a stop fitting portion 2.2 that cooperate with the nut 1. The inner cavity of the nut 1 cooperates to accommodate the stop sleeve. The stop sleeve 3 is coaxially provided with a hole (cavity) 3.1 that cooperates with the stop fitting portion 2.2.

[0017] As a preferred implementation of this embodiment, the threaded portion 2.1 is arranged between the stop fitting portion 2.2 and the head of the bolt 2.

[0018] As a preferred implementation scheme of this embodiment, the inner cavity of the nut 1 is adapted to accommodate a stop sleeve.

[0019] As a preferred implementation of this embodiment, the diameter of the stop fitting portion 2.2 is smaller than the diameter of the threaded portion 2.1.

[0020] As a specific implementation of the present invention, the nut is screwed onto the bolt for tightening, the nut is adjusted to the matching position within the required torque range, and then the stop sleeve is inserted into the cavity between the nut and the stop matching part. Due to the non-circular characteristics of the matching parts of the nut, bolt, and stop sleeve, the nut is prevented from rotating radially, thereby achieving an anti-loosening effect. When the stop sleeve is not installed, there is enough space between the matching parts of the nut and bolt to allow the nut to rotate smoothly. Anti-loosening principle

[0021] The usual anti-loosening principles are: Increase and maintain the friction resistance of the nut: Deformation type: HILOCK, self-locking, nylon nuts, spring washers, etc. are all in this category Adulteration: paint insurance, welding nuts, thread breakage, added fiber or glue are in this category Apply tightening force: double nuts, fuses, etc. are of this type Deformation resistance and shear resistance Pins, split pins, horn washers, etc. Mechanical integration to prevent loosening 1. Tang's thread, forward and reverse rotation nut matching, eccentric tilted nut, double ratchet gasket, etc. The present invention is quite different from other anti-loosening principles of fasteners and generally belongs to the third category.

[0022] Problems encountered with fasteners: Easy to install and disassemble, but low reliability It has high reliability, but is difficult to install and disassemble, and cannot be reused.

[0023] In harsh environments, nuts generally face a decrease in self-sustaining force, or the attached parts are fatigued and fractured due to deformation and shear. The present invention does not have the above-mentioned problems. The principle of the present invention is not to increase friction resistance, nor to resist shearing by deformation. The stop sleeve has a limited deformation amount under the influence of the stress applied by the nut, so as long as the material is within the designed yield, the fastener will not fail. The components of the present invention are easy to disassemble and assemble, and can be reused, with high reliability.

[0024] Finally, it should be noted that the following embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims

1. A fastener anti-loosening solution, characterized in that: The invention comprises a nut, a bolt and a stop sleeve which cooperate with each other. The bolt comprises a threaded part and a stop fitting part which cooperate with the nut, the nut is coaxially provided with an inner cavity which cooperates with the stop sleeve, and the stop sleeve is coaxially provided with an inner cavity which cooperates with the stop fitting part.

2. A fastener anti-loosening solution according to claim 1, characterized in that: The threaded portion is disposed between the stop fitting portion and the bolt head.

3. A fastener anti-loosening solution according to claim 1, characterized in that: The nut is provided with an inner cavity which cooperates with and accommodates the stop sleeve.

4. A fastener anti-loosening solution according to claim 1, characterized in that: The diameter of the stop fitting portion is smaller than the diameter of the threaded portion.

5. A fastener anti-loosening solution according to claim 1, characterized in that: The inner hole (cavity) of the stop sleeve cooperates with the stop fitting part.

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