WO2023029019A1

WO2023029019A1 - Loop-type locknut

Info

Publication number: WO2023029019A1
Application number: PCT/CN2021/116571
Authority: WO
Inventors: 叶春林
Original assignee: 叶春林
Priority date: 2021-09-04
Filing date: 2021-09-04
Publication date: 2023-03-09

Abstract

Disclosed in the present invention is a loop-type locknut. The loop-type locknut comprises a nut provided with a frustum-shaped internal-threaded concave cavity, and an outer frustum-shaped annular member arranged in the nut, wherein an eccentric value for eliminating a thread fit clearance is set between an internal thread and a conical external thread of the annular member, such that under the functions of a formed eccentric structure and a conical thread of the concave cavity of the nut, when the annular member is screwed into a bolt together with the nut for locking, the locking performance of a single nut is retained, and a comprehensive effect is also obtained by means of a multi-characteristic structure. According to the present invention, by pinpointing an effective method for solving a problem and grasping the essential points for solving the problem, by using rational and simple structural characteristics that are easily implemented, and by combining the conical thread and the eccentric structure to lock the bolt in a loop and complementary manner in multiple ways, the practical and reliable effect whereby the nut cannot be loosened when locked is achieved.

Description

Ring lock nut

technical field

The invention relates to the field where looseness needs to be prevented in commonly used bolts and nuts, in particular to a collar-type locknut.

Background technique

At present, it is known that in people's daily life and work, the application of various bolts and nuts can be seen everywhere. They are the most commonly used and common solid parts in various equipment. Screws are also called industrial meters. Although it seems to be relatively small on the surface, its actual effect is by no means small, especially on some important occasions involving safety, including various high-tech objects, the reliability of bolts and nuts cannot be ignored. Loosening or falling may cause fatal damage to the equipment; how to reliably and effectively prevent bolts and nuts from loosening is a specific problem that we often need to face seriously. There are not too few ready-made products and existing technical solutions However, due to the large differences in the requirements of different applications, various existing anti-loosening bolts and nuts and technical solutions also have their own strengths; I saw the comment on the back of the Japanese HardLock nut on the Internet "Whether it is a rocket , airplanes, automobiles or rail transit, the reason why advanced manufacturing industry is "advanced" must have a foundation: the parts must be advanced, not to lag behind. The locknut is the most inconspicuous part, and it is indispensable for all kinds of machine equipment. But It is also in this kind of place that is more basic and more inconspicuous, the gap between China and developed countries will be greater." It is quite touching, which also prompts everyone to work hard, constantly enrich and improve and improve some high reliability and versatility Strong non-loosening nut technical solution; HardLock is a double-nut anti-loosening structure. In reality, it is often limited by the use of space, and a single nut also has anti-loosening requirements.

Contents of the invention

The purpose of the present invention is to solve the problem of preventing nuts from loosening in the prior art, and provide a ring-type anti-loosening nut that is reasonable, reliable, easy to operate, strong in versatility and suitable for single, double and multi-nut use.

In order to achieve the above object, the present invention is mainly solved by the following technical solutions: a ring type locknut, which includes a nut with a truncated cone-shaped internal thread cavity and an outer truncated cone-shaped annular member arranged in it. Between the internal thread of the ring-shaped member and the tapered external thread, an eccentric value is set to eliminate the thread fit gap, and the formed eccentric structure interacts with the taper thread of the nut cavity, so that the ring-shaped member rotates together with the nut. When the bolt is locked, it not only maintains the locking performance of a single nut, but also achieves the expected goal of reliably ensuring that the nut is locked without loosening through the comprehensive effect of multiple characteristic structures;

Furthermore, the above-mentioned single-structure nuts are used superimposedly, and the double-nut multi-ring structure is used to improve the overall anti-loosening effect.

Wherein, the taper of the frustum-shaped internal thread cavity and the conical ring member of the frustum-shaped internal and external thread are selected to meet the progressive locking structural conditions of the tapered thread; the tapered thread structure can be selected according to the size of the nut. Different from the application occasion, it is set as a progressive cam structure with continuous or intermittent annular uniform distribution; the thread clearance and nominal size mentioned refer to the standard size of the nut or non-standard design according to needs.

Preferably, the locking surface of the single-structure nut or the matching double nut can be set in a one-way anti-loosening structure shape, so as to enhance the anti-loosening effect of the nut.

As a preference, it is possible to add a ring-shaped anti-loosening elastic washer that matches the one-way anti-loosening and anti-loosening structure under the nut provided with a one-way anti-retreat and anti-loosening structure, so as to facilitate the anti-loosening of the enhanced nut more reliably effect.

Preferably, the nut can be designed in a form of enlarging the overall structural size to a special specification, so as to enhance the anti-loosening effect of the nut more reliably.

Preferably, the ring-shaped component of the single ring-type anti-loosening nut can be arranged on another nut to form an effective anti-loosening structure of a double-nut combination.

The present invention grasps the key point of solving the problem, and with a reasonable, simple, reliable and easy-to-operate structure, it makes good use of the feature that the nut plays its role mainly on the first and second teeth of its locking surface during use, and has a single The structural nut is equivalent to adding a combined locking setting of a tapered thread and an eccentric structure on the premise of retaining its original locking effect, and makes the ring member and the outer nut synchronously locked , that is, it can be carried and stored in an integrated combination without additional processes, ensuring convenient and reliable anti-loosening effect. Since the functional effect structure is all on the same nut, the characteristics of the tapered thread and the torque of the ultra-small part, It will not cause substantial damage to the bolts. What is rare is that the present invention can not only achieve practical effects on the basis of standard parts specifications, but also provide a better choice for applications and limited use of space. Its practical effect can be improved by enlarging the design size of the overall structure; if the present invention adopts a double nut structure, no matter whether it is to choose a superimposed form or a slightly mutated form, it is equal to having four sections and can stagger the force positions or three The effectiveness of the segmented multiple combination locking structure fully embodies the structural characteristics of the present invention and the active flexibility in solving technical problems. It is a reasonable and compact structural setting to achieve the expected anti-loosening effect.

The present invention has the following beneficial effects: by identifying the effective method for solving the problem and grasping the essential point of solving the problem, with the structural features that are reasonable, simple and easy to implement, by combining the tapered thread and the eccentric structure from various aspects to complement each other Lock the bolts to achieve the practical and reliable effect that the nuts will not loosen when they are locked.

Description of drawings

Fig. 1 is a schematic diagram of a single structure of a collar-type locknut according to the present invention.

In the figure: 1, cavity nut, 2, ring member, 3, bolt.

Fig. 2 is a schematic diagram of a slightly modified structure of a collar-type locknut according to the present invention.

Among the figure: 1, cavity nut, 2, boss nut, 3, bolt.

Detailed ways

A ring-type locknut, which will be further described in conjunction with the schematic diagram below.

Embodiment 1: As shown in Figure 1, it is a single structure of a ring-type locknut, which is provided with a truncated cone-shaped internal thread cavity on the nut, making it a cavity nut 1 as a whole. The cavity of the cavity nut 1 is provided with a ring member 2 of a truncated cone-shaped internal and external thread, where the taper of the tapered thread is set to 3 degrees, and the internal thread of the ring member 2 and the Between the external threads, set an eccentric value based on eliminating the gap between the standard threads, that is, this value is the specification size of the nut—the gap between the internal thread and the bolt 3, and also takes into account the frustum-shaped internal thread and the ring member 2 The matching clearance of the tapered external thread enables the annular member 2 to be screwed into the bolt together with the nut for locking, with the function of the original nut structure formed and preserved, the eccentricity of the annular member 2 and the multiple characteristic structure of the tapered thread The comprehensive structural effect of this invention achieves the expected goal of reliably guaranteeing that only a single structure nut will not loosen when locked; the main guiding idea of the present invention is to solve the problem that the single standard specification nut has limited application occasions but also has anti-loosening reliability requirements. more obviously, the structural features of the present invention can obviously be designed as non-standard products according to actual needs by increasing the size, and the present invention can be used in a superimposed double-nut structure to strengthen the nut lock The overall anti-loosening effect after stopping; wherein, "here the taper of the tapered thread is set to 3 degrees, and between the internal thread and the external thread of the ring member 2, a thread fit based on the elimination specification is set. The eccentric value of the gap", the 3 degrees and the eccentric value mentioned here can adjust this selected value according to the specific application occasions, such as the unilateral interference type selection where the eccentric value can tend to be large; due to the truncated cone thread structure of the present invention characteristics, in addition, the overall structural function effect is realized in the same nut, and the eccentric value of the annular member 2 due to the comprehensive stress relationship will not cause substantial damage to the bolt 3, and if the present invention uses a double nut structure for Anti-loosening, the actual formation of a four-stage locking structure with staggered force positions, compared with the usual double-nut anti-loosening structure, has more prominent structural and functional advantages.

Embodiment 2: As shown in Figure 2, a slightly changed structure of the ring type lock nut is actually designed with the standard size of the standard nut, and the concave cavity nut 1 in this embodiment is the same as that in the embodiment The structural features of 1 have not changed in any way, but the ring-shaped member part in embodiment 1 is added to another nut, thereby forming the boss nut 2. In the specific implementation, the structural and functional effects of the double nuts are the same as those of the embodiment 1 are slightly different but each has its own strengths, the overall structure and efficacy are also worthy of recognition, and can be selected for different needs; in order to meet the needs of different occasions, the boss part thread on the boss nut 2 can be set to be the same as the main body nut The screw threads form a structure that staggers a synchronous difference. In the implementation, there are also several samples of this structure. The selected deviation is about 90 degrees, and the locking effect is good, and this asynchronous difference can be adjusted according to different applications. If the present embodiment is to enhance the substantive effect, obviously it can also be designed as a non-standard product according to actual needs to increase the size.

Obviously, those skilled in the art can make various changes to the structural arrangement of the present invention without departing from the spirit and scope of the present invention. Therefore, the present invention is also intended to cover these changes if they fall within the technical scope of the claims of the present invention and equivalents thereof.

Claims

A ring type locknut is characterized in that it includes a nut provided with a truncated cone-shaped internal thread cavity and an outer truncated cone-shaped ring member arranged in it, and the inner thread of the ring member and the cone outer thread In between, an eccentric value is set to eliminate the thread fit clearance, and the formed eccentric structure interacts with the taper thread of the nut cavity, so that when the ring member is screwed into the bolt together with the nut for locking, it not only maintains the locking effect of a single nut Combined performance, and through the comprehensive effect of multiple characteristic structures, the expected goal of reliably ensuring that the nut is locked without loosening is achieved;

Furthermore, the above-mentioned single-structure nuts are used superimposedly, and the double-nut multi-ring structure is used to improve the overall anti-loosening effect.
According to claim 1, the ring-type anti-loosening nut is characterized in that the locking surface of the single-structure nut or the superimposed nut can be set as a one-way anti-loosening and anti-loosening structure shape, so as to enhance the nut's Anti-loose effect.
According to claim 2, the ring type anti-loosening nut is characterized in that, under the nut provided with a one-way anti-retraction and anti-loosening structure, an anti-retraction ring matching its one-way anti-retraction and anti-loosening structure can be added The anti-loosening elastic washer is used to enhance the anti-loosening effect of the nut more reliably.
The ring-type anti-loosening nut according to claim 1, characterized in that the nut can be designed in a form of enlarging the overall structural size to a special specification, so as to enhance the anti-loosening effect of the nut more reliably.