CN214533961U

CN214533961U - Bolt structure capable of never loosening

Info

Publication number: CN214533961U
Application number: CN202120581805.5U
Authority: CN
Inventors: 赵世国; 赵玲
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-03-23
Filing date: 2021-03-23
Publication date: 2021-10-29
Anticipated expiration: 2031-03-23

Abstract

The utility model relates to a bolt structure that never loosens belongs to bolt fastener technical field. Including bolt, corotation nut, derotation nut, be equipped with corotation screw thread and derotation screw thread on the stock of bolt, and derotation screw thread section diameter is less than corotation screw thread section diameter, and corotation nut and derotation nut connect on the bolt soon, corotation nut and derotation nut binding face can interconnect, make both can synchronous rotations. The utility model discloses a with the faying face interconnect of positive spin nut and derotation nut, make both can rotate in step, positive spin nut or derotation nut receive the vibration and appear becoming flexible messenger, drive the synchronous rotation of another nut to offset the effort of not hard up nut, make the nut can not become flexible, realize never not hard up of nut.

Description

Bolt structure capable of never loosening

Technical Field

The utility model belongs to the technical field of bolt fastener, specific theory relates to a bolt structure that never loosens.

Background

The bolt connection is a general part connection structure, the existing common screw is a bolt, a gasket and a nut combination, when the requirement for fastening parts is not high, the common screw can deal with the problem that equipment faults are caused due to bolt looseness caused by long time when the parts are subjected to large vibration in special environments such as the fields of fastening high-speed rail parts, parts on airplanes, bridges, steel structure iron towers and the like, the bolt looseness problem is solved by adopting methods of double nuts, additionally arranging spring cushions and the like, but the bolt looseness still can occur after long-time use.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a bolt structure that never loosens. The combined surfaces of the forward-rotation nut and the backward-rotation nut are connected with each other, so that the forward-rotation nut and the backward-rotation nut can synchronously rotate, the forward-rotation nut or the backward-rotation nut is vibrated to loosen and drive the other nut to synchronously rotate, thus counteracting the acting force of the loosened nut, preventing the nut from loosening and realizing the purpose that the nut is never loosened.

In order to achieve the above purpose, the utility model is implemented according to the following technical scheme:

the utility model provides a bolt structure that never moves, includes bolt, corotation nut, derotation nut, be equipped with corotation screw thread and derotation screw thread on the stock of bolt, and derotation screw thread section diameter is less than corotation screw thread section diameter, and corotation nut and derotation nut connect on the bolt soon, the binding face of corotation nut and derotation nut can interconnect, make both can synchronous rotation.

Preferably, the binding surfaces of the forward-rotation nut and the reverse-rotation nut are respectively provided with toothed stripes capable of being meshed with each other.

Preferably, the binding surfaces of the forward-rotation nut and the reverse-rotation nut are respectively provided with a protrusion and a groove which can be complemented.

Preferably, a thread protection groove is arranged on the bottom surface of the reverse-rotation nut.

The utility model has the advantages that:

the utility model discloses a with the faying face interconnect of positive spin nut and derotation nut, make both can rotate in step, positive spin nut or derotation nut receive the vibration and appear becoming flexible messenger, drive the synchronous rotation of another nut to offset the effort of not hard up nut, make the nut can not become flexible, realize never not hard up of nut.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic view of the connection of the present invention;

fig. 2 is a perspective view = a schematic structural view of the present invention;

FIG. 3 is a schematic view of the three-dimensional structure of the anti-rotation nut of the present invention;

FIG. 4 is a schematic view of the three-dimensional structure of the anti-rotation nut of the present invention;

fig. 5 is a schematic view of the three-dimensional structure of the positive rotation nut of the present invention;

FIG. 6 is a schematic view of the three-dimensional structure of the bolt of the present invention;

in FIGS. 1-6, 1-bolt, 2-positive nut, 3-negative nut, 4-dentate stripe, 5-thread protective groove, 6-bump, 7-groove.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the following will explain in detail a preferred embodiment of the present invention with reference to the accompanying drawings to facilitate understanding of the skilled person.

As shown in the figure, the bolt structure which can never loosen comprises a bolt 1, a forward-rotating nut 2 and a reverse-rotating nut 3, wherein a bolt rod of the bolt 1 is provided with a forward-rotating thread and a reverse-rotating thread, the diameter of the reverse-rotating thread section is smaller than that of the forward-rotating thread section, the reverse-rotating thread section is positioned at the tail end of the bolt 1, the forward-rotating thread section is a pressing part, the reverse-rotating thread section is a locking part, the forward-rotating nut 2 and the reverse-rotating nut 3 are respectively and correspondingly screwed on the bolt 1, the forward-rotating nut 2 is used for pressing a workpiece, the reverse-rotating nut 3 is used for locking, the binding surfaces of the forward-rotating nut 2 and the reverse-rotating nut 3 can be mutually connected, so that the forward-rotating nut and the reverse-rotating nut can synchronously rotate, when the forward-rotating thread presses the workpiece, the workpiece can not move downwards, the workpiece can not move upwards due to being propped against the workpiece, and the reverse-rotating thread can be connected into a whole by the reverse-rotating thread, and the two nuts are combined into a whole, can not rotate leftwards, can not rotate rightwards, and can not move upwards or downwards, thereby achieving the purpose of never loosening. When the bolt is used, the forward-rotation nut 2 is screwed into the forward-rotation thread section of the bolt 1 and is screwed, so that the forward-rotation nut 2 compresses a workpiece, then the reverse-rotation nut 3 is screwed into the reverse-rotation thread section of the bolt 1 and is screwed, so that the bottom surface of the forward-rotation nut 2 and the top surface of the reverse-rotation nut 3 are connected with each other, synchronous rotation of the forward-rotation nut 2 and the reverse-rotation nut 3 is realized, when the forward-rotation nut 2 and the reverse-rotation nut 3 are vibrated and unscrewed, 1. the forward-rotation nut 2 is unscrewed, the acting force of the forward-rotation nut 2 is upward to drive the reverse-rotation nut 3 to be screwed, the acting force of the reverse-rotation nut 3 is downward, and the acting forces of the forward-rotation nut 2 and the reverse-rotation nut 3 are mutually offset and cannot be loosened; 2. the reverse-rotation nut 3 is loosened, the acting force of the reverse-rotation nut 3 is upward to drive the forward-rotation nut 2 to be screwed, the acting force of the forward-rotation nut 2 is downward, and the acting forces of the forward-rotation nut 2 and the reverse-rotation nut 3 are mutually offset and cannot be loosened.

Preferably, tooth-shaped stripes 4 which can be meshed with each other are respectively arranged on the binding surfaces of the forward nut 2 and the forward nut 2, the tooth-shaped stripes 4 are arranged along the radial direction of the nut and are respectively arranged on the top surface of the forward nut 2 and the bottom surface of the reverse nut 3, after the forward nut 2 and the reverse nut 3 are screwed, the synchronous and same-direction rotation of the forward nut 2 and the reverse nut 3 is realized through the tooth-shaped stripes 4 which are meshed with each other, the structure is simple, and the use is convenient. The back-screwing nut 3 needs to be loosened when vibrating, the generated force is larger than the biting force of the two nut tooth-shaped stripes, and the back-screwing nut cannot be loosened when the vibrating force cannot be larger than the biting force. When the fastening state of the bolt is released, the fastening state can be quitted only by forcibly rotating the counter-rotating nut 3 clockwise to enable the radial teeth of the lock nut to retreat out of the meshing state.

Preferably, the binding surfaces of the forward nut 2 and the reverse nut 3 are respectively provided with a protrusion 6 and a groove 7 which can be complemented with each other, the protrusions 6 are uniformly arranged on the bottom surface of the reverse nut 3 at intervals, the grooves 7 are uniformly arranged on the top surface of the forward nut 2 at intervals, and after the forward nut 2 and the reverse nut 3 are screwed, the protrusions 6 are embedded into the grooves 7, so that the forward nut 2 and the reverse nut 3 synchronously rotate in the same direction.

Preferably, the thread protection groove 5 is formed in the bottom surface of the counter-rotating nut 3, the thread protection groove 5 and a threaded hole of the counter-rotating nut 3 are coaxially arranged, the diameter of the thread protection groove is larger than that of a forward-rotating thread section of the bolt 1, it is effectively guaranteed that the bottom surface of the counter-rotating nut 3 can still be tightly attached to the top surface of the forward-rotating nut 2 after the counter-rotating nut 3 is screwed downwards when the forward-rotating nut 2 is screwed downwards too much, and the thread safety of the counter-rotating nut 3 is effectively protected.

The utility model discloses the principle:

1. the bolt 1 has a compression part and a locking part, wherein the compression part is a forward thread, and the locking part is a reverse thread (the diameter is smaller than that of the compression part).

2. The positive-rotation nut 2 is a positive-rotation thread, the plane is provided with radial dentate stripes, the negative-rotation nut 3 is a negative-rotation thread, and the groove (the diameter is larger than the diameter of the positive-rotation thread) is deep and has two positive-rotation thread pitches (used for adjusting the plane occlusion of the two nuts);

3. when the nut is used, a workpiece is fastened by the forward-rotation threads 2 (the radial line tooth-shaped stripes face outwards), and then the backward-rotation threads 3 are screwed leftwards until the radial teeth of the two nuts are completely occluded to form fastening and locking.

4. The lock nut should be loosened when vibrating, the generated force should be larger than the biting force of the radial teeth of the two nuts, and the lock nut cannot be loosened when the vibrating force cannot be larger than the biting force!

5. When the fastening state of the bolt is released, the fastening state can be withdrawn only by forcibly rotating the lock nut clockwise to enable the lock nut radial teeth to retreat from the meshed state.

Note: the forward-rotation nut 2 is loosened only upwards but not downwards when vibrating, and can be loosened only by rotating in the anticlockwise direction due to the fact that a workpiece is abutted, but the reverse-rotation nut 3 is abutted, and the reverse-rotation nut 3 rotates in the anticlockwise direction, so that the reverse-rotation nut cannot be loosened. The back-screwing nut needs to be loosened and cannot be loosened by the occlusion of the radial teeth of the two nuts. When the reverse-rotation nut 3 is locked, the forward-rotation nut 2 is driven to clamp the reverse-rotation nut.

Finally, it is noted that the above preferred embodiments illustrate rather than limit the invention, and that, although the invention has been described in detail with reference to the above preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the invention as defined by the appended claims; the size of the attached figure is irrelevant to the specific real object, and the size of the real object can be changed at will.

Claims

1. The utility model provides a bolt structure of never loosening, includes bolt (1), positive spin nut (2), derotation nut (3), be equipped with positive spin screw thread and derotation screw thread on the stock of bolt (1), and derotation screw thread section diameter is less than positive spin screw thread section diameter, and positive spin nut (2) and derotation nut (3) connect on bolt (1) soon, its characterized in that: binding surfaces of the forward-rotation nut (2) and the reverse-rotation nut (3) can be connected with each other, so that the forward-rotation nut and the reverse-rotation nut can synchronously rotate.

2. A permanently set bolt construction as claimed in claim 1, wherein: tooth-shaped stripes (4) which can be meshed with each other are respectively arranged on binding surfaces of the forward-rotation nut (2) and the reverse-rotation nut (3).

3. A permanently set bolt construction as claimed in claim 1, wherein: the binding surfaces of the forward-rotation nut (2) and the reverse-rotation nut (3) are respectively provided with a protrusion (6) and a groove (7) which can be complemented.

4. A permanently set bolt construction according to claim 2 or 3, characterised in that: and a thread protective groove (5) is arranged on the bottom surface of the counter-rotating nut (3).