CN114215840A

CN114215840A - Never-loosening screw

Info

Publication number: CN114215840A
Application number: CN202210024971.4A
Authority: CN
Inventors: 韦庆龙
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-01-11
Filing date: 2022-01-11
Publication date: 2022-03-22

Abstract

The invention discloses a never-loosening screw, which comprises a screw rod, a convex nut and a concave nut, wherein the screw rod is screwed into a workpiece to be fixed, the convex nut is screwed into the screw rod and locked, and the concave nut is screwed into the screw rod to further clamp and fix the convex nut; it is characterized in that; the screw is provided with a mixed thread section consisting of an eccentric low thread and an eccentric high thread, the edge of the eccentric low thread is provided with a concave arc to enable the edge of the eccentric low thread to form a concave low state, and the edge of the eccentric thread without the concave arc is protruded to form the eccentric high thread; the convex nut is arranged to fix the workpiece, the anti-slip teeth of the convex nut are internally provided with low threads, and the concave nut is arranged to further fix the convex nut, so that the purpose that the workpiece is locked and cannot be loosened is achieved; the screw has the advantages of strong fastening effect, good universality, suitability for use in various states, simple processing and suitability for mass production.

Description

Never-loosening screw

Technical Field

The invention relates to a screw, in particular to a non-loosening screw.

Background

The screw is a very widely used fastening part, and is required to be permanently fixed in mechanical equipment, vehicles, tracks, high-speed rotating or moving equipment and the like, but most of the existing screw products are gradually loosened to be loosened under the long-time vibration of machinery, so that great hidden dangers are brought to the operation of the mechanical equipment or traffic and the like;

therefore, the improvement of the existing screw technology is a great subject which needs to be solved urgently in the screw industry.

Disclosure of Invention

The invention aims to provide a never-loosening screw, wherein a mixed thread section consisting of an eccentric high thread and an eccentric low thread is arranged on a thread section of a screw rod, a workpiece is locked and never loosened by locking a convex nut and a concave nut, and the eccentric high thread can prevent the eccentric low thread from rotating and displacing in a low state, so that the never-loosening effect is achieved.

A never-loosening screw comprises a screw body, wherein the screw body comprises a screw rod, a convex nut and a concave nut; the screw rod is used for screwing in a workpiece to be fixed, the convex nut is screwed in the screw rod to be locked, and the concave nut is screwed in the screw rod to further clamp and fix the convex nut.

One end of the screw is a fixing nut, and the other end of the screw is a threaded section; the middle of the thread section is a mixed thread section consisting of an eccentric high thread and an eccentric low thread; the eccentric low thread is characterized in that a strip-shaped concave arc with the same size and shape is arranged on the edge of the eccentric thread, the concave arc enables the edge of the eccentric thread to form a sunken eccentric low thread in a low state, the eccentric low threads are arranged on the eccentric thread in a crossed manner, namely every 1 circle of eccentric threads, the front end and the rear end of the next circle of eccentric thread are respectively provided with opposite eccentric low threads, and the edge of the eccentric thread without the concave arc protrudes to form an eccentric high thread; the upper end and the lower end of the mixed thread section of the thread section are normal thread sections formed by normal threads.

The convex nut acts on fixation, the convex part of the convex nut is provided with anti-skidding teeth, the inner wall of each anti-skidding tooth is provided with a low thread, and the end of the nut at the other end is internally provided with a normal internal thread.

The female nut acts on the reinforcement, and female nut one end is equipped with sunken hole, and the other end is equipped with normal internal thread.

When fastening, the convex nut is firstly screwed into the mixed thread section of the screw, the convex nut locks the workpiece, the eccentric high thread and the eccentric low thread are arranged in a mixed manner, and the gripping force between the mixed thread section and the convex nut is increased; the concave nut is screwed into the screw until the concave hole of the concave nut is clamped on the anti-slip tooth of the convex nut and locked, and the low thread on the inner wall of the anti-slip tooth is compressed in the concave arc of the eccentric low thread in the mixed thread section of the screw, so that the sliding displacement of the convex nut is effectively prevented.

Preferably, the height of the central point of the eccentric low-thread concave arc is 5% -30% lower than that of the eccentric high-thread, and the screw is suitable for screws with the height of more than m6, wherein the larger the size of the screw is, the smaller the height-to-value ratio is, and the smaller the screw is, the larger the height-to-value ratio is.

Preferably, the anti-skid teeth of the male nut are uniformly provided in a plurality of pieces.

As an optimal scheme, the diameters of normal threads, eccentric low threads and eccentric high threads on the thread sections are all consistent; the heights of the normal thread and the eccentric high thread are consistent.

The invention has the advantages that the screw is provided with the mixed thread section consisting of the eccentric low thread and the eccentric high thread, the edge of the eccentric thread is provided with the concave arc to ensure that the edge of the eccentric thread forms the concave low-state eccentric low thread, and the edge of the eccentric thread without the concave arc protrudes to form the high thread; a convex nut is arranged to fix a workpiece, low threads are arranged in the anti-slip teeth of the convex nut, and the concave nut is arranged to further fix the convex nut, so that the purpose of never loosening is achieved; the screw has strong fastening effect and good universality, is suitable for being used in various states, has simple processing procedures and is suitable for mass production.

[ description of the drawings ]

FIG. 1 is a general view of a screw according to the present invention

FIG. 2 is a front view of the screw of the present invention;

FIG. 3 is a side view of the screw of the present invention:

FIG. 4 is another schematic front view of the screw of the present disclosure;

FIG. 5 is a schematic view of a male nut of the present invention;

FIG. 6 is a cross-sectional view of a male nut of the present invention;

FIG. 7 is a schematic view of a female nut of the present invention;

FIG. 8 is a schematic view of the working state of the screw according to the present invention.

Wherein: 100-screw body, 10-screw rod, 11-thread section, 6-normal thread, 111-normal thread section, 112-mixed thread section, 7-eccentric low thread, 71-concave arc, 8-eccentric high thread, 12-fixed nut, 13-wire diameter,

20-convex nut, 21-nut end, 211-normal internal thread, 22-anti-slip tooth, 221-low thread, 30-concave nut, 31-concave hole, 32-internal thread and 40-external workpiece.

[ detailed description ] embodiments

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly. In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," "mounted," and the like are to be construed broadly, e.g., "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Referring to fig. 1 to 8, a never-loosening screw includes a screw body 100, where the screw body 100 includes a threaded rod 10, a male nut 20, and a female nut 30; the male nut 20 is screwed into the screw 10 to be locked, and the female nut 30 is screwed into the screw 10 to further clamp and fix the male nut 20.

One end of the screw rod 10 is provided with a fixed screw cap 12, and the other end is provided with a threaded section 11; the middle of the thread section 11 is provided with a mixed thread section 112 consisting of an eccentric low thread 7 and an eccentric high thread 8; the eccentric low thread 7 is a strip-shaped concave arc 71 with the same size and shape on the edge of the eccentric thread, the concave arc 71 enables the edge of the eccentric thread to form a sunken eccentric low thread 7 in a low state, the eccentric low thread 7 is crossly arranged on the eccentric thread, namely every 1 circle of eccentric threads, the front end and the rear end of the next circle of eccentric thread are respectively provided with the opposite eccentric low thread 7, and the edge of the eccentric thread without the concave arc 71 is protruded to form an eccentric high thread 8; the upper end and the lower end of the mixed thread section 112 of the thread section 11 are normal thread sections 111 consisting of normal threads 6.

The convex nut 20 is used for fixing, the convex part of the convex nut 20 is provided with anti-skid teeth 22, the inner wall of the anti-skid teeth 22 is provided with low threads 221, and the nut end 21 at the other end is provided with normal internal threads 211.

The female nut 30 is used for reinforcement, and one end of the female nut 30 is provided with a recessed hole 31, and the other end of the female nut is provided with an internal thread 32.

When the screw is used, the convex nut 20 is firstly screwed into the mixed thread section 112 of the screw 10, the convex nut 20 locks a workpiece, the eccentric low thread 7 and the eccentric high thread 8 are arranged in a mixed mode, and the gripping force between the mixed thread section 112 and the internal thread of the convex nut 20 is increased; the female nut 30 is screwed into the screw 10 until the concave hole 31 of the female nut 30 is clamped and locked on the anti-slip tooth 22 of the male nut 20, and the low thread 221 on the inner wall of the anti-slip tooth 22 is pressed in the concave arc 71 of the eccentric low thread 7 of the mixed thread section 112 of the screw 10, so that the effect of preventing the male nut 20 from sliding and displacing is achieved.

Preferably, the height of the central point of the concave arc 71 of the eccentric low thread 7 is 5% -30% lower than that of the eccentric high thread 8, and the thread is suitable for threads with the height value of m6 or more, wherein the larger the thread size is, the smaller the height value ratio is, and the smaller the thread size is, the larger the height value ratio is.

Preferably, the anti-slip teeth 22 are uniformly provided in a plurality of pieces.

As an optimal scheme, the line diameters 13 among the normal threads 6, the eccentric low threads 7 and the eccentric high threads 8 on the thread sections 11 are all consistent; the heights of the normal thread 6 and the eccentric high thread 8 are consistent.

The working principle of the invention is as follows: the method comprises the following steps of arranging an eccentric low thread, wherein a concave arc is arranged in the middle of the eccentric low thread, so that the edge of the eccentric low thread is in a concave low state and is lower than the eccentric high thread, and the thread section in the middle of a screw rod is formed into a mixed thread section by the arrangement of the eccentric low thread and the eccentric high thread; a convex nut is arranged, and the inner wall of the convex anti-skid tooth at one end of the convex nut is provided with a low thread; when the clamping device works, the screw rod is screwed into a workpiece to be fixed, the convex nut is screwed into the screw rod, the low thread of the convex nut is meshed with the mixed thread of the bolt, the low-state eccentric low thread and the eccentric high thread are meshed with the internal thread and the low thread of the convex nut more tightly, the gripping force is larger, and the fastening force is strong; the concave nut is screwed into the screw rod until the concave hole of the concave nut is screwed on the anti-slip tooth of the convex nut, in the screwing process, the anti-slip tooth is pressed on the mixed thread section of the screw more tightly, so that the low thread on the inner wall of the anti-slip tooth is pressed into the concave arc of the eccentric low thread of the screw rod, the eccentric high thread is matched, the eccentric high thread prevents the low-state thread position from moving, and the concave arc has the effect of increasing the grip force, so that the workpiece is locked, and the screw is a permanent non-loosening screw.

The screw can be used as a universal screw, has wide application range, simple integral production process and mechanized batch production, and is worthy of vigorous popularization and use.

The above description is only for the preferred embodiment of the present invention, and the above specific embodiments are not intended to limit the present invention. Various modifications and alterations may occur to those skilled in the art without departing from the spirit and scope of the invention, and such modifications and alterations should be accorded the broadest interpretation so as to encompass all such modifications and alterations.

Claims

1. A never-loosening screw comprises a screw body, wherein the screw body comprises a screw rod, a convex nut and a concave nut; the screw rod is twisted and is waited to fix the work piece, and the screw rod locking is twisted to the convex nut, and the concave nut is twisted the screw rod and is fixed its characterized in that with the further chucking of convex nut:

one end of the screw is a fixing nut, and the other end of the screw is a threaded section; the middle of the thread section is a mixed thread section consisting of an eccentric high thread and an eccentric low thread; the eccentric low thread is characterized in that a strip-shaped concave arc with the same size and shape is arranged on the edge of the eccentric thread, the concave arc enables the edge of the eccentric thread to form a sunken eccentric low thread in a low state, the eccentric low threads are arranged on the eccentric thread in a crossed manner, namely every 1 circle of eccentric threads, the front end and the rear end of the next circle of eccentric thread are respectively provided with opposite eccentric low threads, and the edge of the eccentric thread without the concave arc protrudes to form an eccentric high thread; the upper end and the lower end of the mixed thread section of the thread section are normal thread sections formed by normal threads;

the convex nut acts on fixation, the protruding part of the convex nut is provided with anti-skid teeth, the inner wall of each anti-skid tooth is provided with a low thread, and the nut end at the other end is internally provided with a normal internal thread;

the female nut acts on reinforcement, a concave hole is formed in one end of the female nut, and normal internal threads are formed in the other end of the female nut;

when fastening, the convex nut is firstly screwed into the mixed thread section of the screw, the convex nut locks a workpiece to be fixed, the eccentric high thread and the eccentric low thread are arranged in a mixed manner, and the gripping force between the mixed thread section and the convex nut is increased; the concave nut is screwed into the screw until the concave hole of the concave nut is clamped on the anti-slip tooth of the convex nut and locked, and the low thread on the inner wall of the anti-slip tooth is compressed in the concave arc of the eccentric low thread in the mixed thread section of the screw, so that the sliding displacement of the convex nut is effectively prevented.

2. A never-loose screw as claimed in claim 1, wherein: the height of the central point of the eccentric low-thread concave arc is 5% -30% lower than that of the eccentric high-thread, and the screw is suitable for screws above m6, wherein the larger the size of the screw is, the smaller the height-value comparison is, and the smaller the screw is, the larger the height-value comparison is.

3. A never-loose screw as claimed in claim 1, wherein: the anti-skid teeth of the convex nuts are uniformly arranged into a plurality of pieces.

4. A never-loose screw as claimed in claim 1, wherein: the diameters of normal threads, eccentric low threads and eccentric high threads on the thread sections are all consistent; the heights of the normal thread and the eccentric high thread are consistent.