阅读说明：本技术 一种防松动的紧固装置 (Locking fastener that moves ) 是由 吴腾丰 刘亚青 于 2020-11-13 设计创作，主要内容包括：本发明公开了一种防松动的紧固装置,其技术方案要点是一种防转动的紧固装置,包括螺母和螺栓,所述螺栓上半段外侧壁设置有单向螺纹,所述螺栓下半段外侧壁设置有双向螺纹,所述螺母包括上螺母和下螺母,所述上螺母螺接在螺栓的上半段,所述下螺母螺接在螺栓的下半段,所述上螺母和下螺母的旋向相反,所述上螺母和下螺母皆设置有连接装置,所述上螺母和下螺母通过连接装置螺接,所述上螺母设置有锁紧装置,所述上螺母通过锁紧装置与下螺母锁死。(The invention discloses an anti-loosening fastening device which is characterized by comprising a nut and a bolt, wherein the outer side wall of the upper half section of the bolt is provided with a unidirectional thread, the outer side wall of the lower half section of the bolt is provided with a bidirectional thread, the nut comprises an upper nut and a lower nut, the upper nut is screwed on the upper half section of the bolt, the lower nut is screwed on the lower half section of the bolt, the rotating directions of the upper nut and the lower nut are opposite, the upper nut and the lower nut are both provided with connecting devices, the upper nut and the lower nut are screwed through the connecting devices, the upper nut is provided with a locking device, and the upper nut is locked with the lower nut through the locking device.)

1. The utility model provides a locking fastener that moves, includes nut and bolt (1), its characterized in that: the outer side wall of the upper half section of the bolt (1) is provided with a one-way thread (11), the outer side wall of the lower half section of the bolt (1) is provided with a two-way thread (12), the nut comprises an upper nut (2) and a lower nut (3), the upper nut (2) is screwed on the upper half section of the bolt (1), the lower nut (3) is screwed on the lower half section of the bolt (1), the screwing directions of the upper nut (2) and the lower nut (3) are opposite, the upper nut (2) and the lower nut (3) are both provided with a connecting device (6), the upper nut (2) and the lower nut (3) are in threaded connection through a connecting device (6), the upper nut (2) is provided with a locking device (4), the upper nut (2) is locked with the lower nut (3) through the locking device (4), the bottom surface of the upper nut (2) and the top surface of the lower nut (3) are both provided with anti-loosening threads.

2. A fastening device against loosening according to claim 1, wherein the connecting device (6) comprises a second thread groove (211) and a hollow stud (31), the upper end surface of the lower nut (3) is provided with the hollow stud (31), the outside thread direction of the hollow stud (31) is opposite to that of the one-way thread (11), the lower end surface of the upper nut (2) is provided with the second thread groove (211), the second thread groove (211) is located outside the threaded hole, and the hollow stud (31) is in threaded connection with the second thread groove (211).

3. A locking fastening device as claimed in claim 1 or 2, wherein: one-way internal thread (22) that upper nut (2) set up matches with one-way screw thread (11), internal thread (32) that lower nut (3) set up are opposite with one-way screw thread (11) spiral direction, upper nut (2) are rotatory to the upper half section from the lower half section of bolt (1).

4. A locking fastener of claim 3, wherein: a plurality of elastic plates (33) are fixed on the upper end surface of the lower nut (3), a circular hole (331) is arranged at the upper end of each elastic plate (33), a plurality of moving grooves (23) are arranged at the position of the upper nut (2) corresponding to the elastic plate (33), when the upper nut (2) and the lower nut (3) are not screwed, the elastic plate (33) is positioned at the tail part of the moving groove (23), the lower nut (3) continues to rotate upwards until the lower nut is completely screwed with the upper nut (2), the elastic plate (33) is positioned at the top of the moving groove (23), when the elastic plates (33) reach the top of the moving groove (23), the two elastic plates (33) are folded towards the direction away from the bolt (1) until one side end surface of the elastic plate (33) is abutted against the upper end surface of the upper nut (2), the elastic plate (33) is secured in position after folding by means of a locking device (4).

5. A locking fastening device as claimed in claim 1, wherein: the locking device (4) comprises a thread groove (41) and a second bolt (42), the upper end face of the upper nut (2) is provided with a plurality of thread grooves (41), the positions of the thread grooves (41) are opposite to the positions of the circular holes (331), and the second bolt (42) penetrates through the circular holes (331) and is in threaded connection with the thread grooves (41).

6. A locking fastening device as claimed in claim 1, wherein: go up nut (2) and lower nut (3) spiro union back cover and have shell (5), shell (5) are hollow structure, and the upper end and the lower extreme of shell (5) all are provided with second circular port (51) that can supply bolt (1) to pass.

Technical Field

The invention relates to the field of fasteners, in particular to an anti-loosening fastening device.

Background

The nut and supporting bolt often constitute fastener and be used for fixing other spare parts, but the nut often can produce because external factors such as vibrations are not hard up, though have the device of avoiding the nut not hard up among the prior art, but the structure singleness of the anti-loosening device among the prior art, the effect of locking is relatively poor, often causes the nut to lose the fixed action to spare part, needs the user often to tighten the nut once more, extravagant a large amount of time and energy of user.

Disclosure of Invention

In view of the disadvantages of the prior art, the present invention is directed to a fastening device for preventing loosening, which can prevent a nut from rotating due to external vibration and the like.

In order to achieve the purpose, the invention provides the following technical scheme:

this kind of prevent fastener that rotates, including nut and bolt, first section lateral wall of bolt is provided with one-way screw thread, second section lateral wall of bolt is provided with two-way screw thread, the nut includes nut and lower nut, the nut spiro union is in the first section of bolt, the nut spiro union is in the second section of bolt down, the direction of turning on of nut and lower nut is opposite, nut and lower nut all are provided with connecting device, nut and lower nut pass through the connecting device spiro union, the nut is provided with locking device, the nut passes through locking device and lock with the lower nut and dies, nut bottom surface and lower nut top surface all are equipped with the check line.

Further, according to claim 1, the connecting device comprises a second thread groove and a hollow stud, the upper end surface of the lower nut is provided with the hollow stud, the outer thread direction of the hollow stud is opposite to that of the one-way thread, the lower end surface of the upper nut is provided with the second thread groove, the second thread groove is located on the outer side of the threaded hole, and the hollow stud is in threaded connection with the second thread groove.

Furthermore, the one-way internal thread arranged on the upper nut is matched with the one-way thread, and the internal thread arranged on the lower nut is opposite to the one-way thread in rotation direction. The upper nut rotates from the lower half section to the upper half section of the bolt.

Further, the up end of lower nut is fixed with a plurality of elastic plates, the upper end of elastic plate is provided with the circular port, the position that the upper nut corresponds the elastic plate is provided with a plurality of shifting chutes, when upper nut and lower nut are not the spiro union, the elastic plate is located the afterbody of shifting chute, the lower nut continues the rotation upwards until with the complete spiro union back of upper nut, the elastic plate is located the top of shifting chute, when the elastic plate reachd the top of shifting chute, two elastic plates all are folding to the direction of keeping away from the bolt, and a side end face and the up end of upper nut of elastic plate are inconsistent, the elastic plate passes through locking device and is fastened on the position after folding.

Furthermore, the locking device comprises a thread groove and a second bolt, the upper end face of the upper nut is provided with a plurality of thread grooves, the thread grooves are opposite to the position of the circular hole, and the second bolt penetrates through the circular hole and is in threaded connection with the thread groove.

Further, the upper nut and the lower nut are sleeved with a shell after being screwed, the shell is of a hollow structure, and second round holes for bolts to pass through are formed in the upper end and the lower end of the shell.

Through the technical scheme, the invention has the beneficial effects that:

1. the elastic plate penetrates through the whole upper nut from bottom to top, then is folded towards the direction far away from the bolt, and then is tightly fixed on the upper end surface of the upper nut through the locking device, so that the effect that the lower nut is not easy to rotate is achieved;

2. the hollow stud is in threaded connection with the second thread groove, so that the lower nut and the upper nut are restricted with each other, the upper nut is not easy to loosen, and the effect that the nut is not easy to loosen due to factors such as external vibration and the like is achieved;

3. go up the nut and overlap behind the nut spiro union has the shell, and the shell tightly wraps up two nuts for two nuts are hugged closely together, and difficult separation and rotation have also completely cut off external dust and rainwater simultaneously, have reached and have prevented that the nut from droing, separating and the not fragile effect of protection nut.

Drawings

FIG. 1 is a perspective view of an anti-rotation fastening device;

FIG. 2 is a perspective view of the anti-rotation fastener device with the housing removed;

FIG. 3 is a cross-sectional view of FIG. 2;

FIG. 4 is a perspective view of the upper nut;

fig. 5 is a perspective view of the lower nut.

Reference numerals: 1. a bolt; 11. one-way threads; 12. bidirectional screw threads; 2. screwing a nut; 211. a second thread groove; 22. one-way internal threads; 23. a moving groove; 3. a lower nut; 31. a hollow stud; 32. An internal thread; 33. an elastic plate; 331. a circular hole; 4. a locking device; 41. a thread groove; 42. a second bolt; 5. a housing; 51. a second circular hole; 6. and (4) a connecting device.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. In which like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "bottom" and "top," "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

Referring to fig. 1 to 5, the working principle of the present embodiment is as follows: the user rotates the upper nut 2 from the lower end of the bolt 1 upwards until the upper end face of the upper nut 2 is abutted against the part to be fixed, then the lower nut 3 is screwed upwards from the lower end of the bolt 1 in the opposite direction, when the lower nut 3 is not screwed with the upper nut 2, the elastic plate 33 passes through the tail part of the movable groove 23, in the process of continuing to rotate the lower nut 3 upwards, the elastic plate 33 gradually enters the inner cavity of the movable groove 23, at the moment, the hollow stud 31 is also screwed with the second thread groove 211, after the lower nut 3 is completely screwed with the upper nut 2, the hollow stud 31 is also completely screwed with the second thread groove 211, the screwing direction of the hollow stud 31 is opposite to the one-way thread 11, the fastening effect is realized, at the moment, the elastic plate 33 reaches the top of the movable groove 23, the elastic plate 33 is folded in the direction far away from the bolt 1 until one side end face of the elastic plate 33 is abutted against the upper, then, the second bolt 42 is passed through the circular hole 331 of the elastic plate 33, the second bolt 42 is screwed with the thread groove 41, the elastic plate 33 is fixed on the upper end surface of the upper nut 2, after the two nuts are screwed, the bolt 1 is passed through the two circular holes 331 provided on the housing 5, and the housing 5 wraps the two nuts from below the lower nut 3.

Referring to fig. 1 to 5, the anti-rotation fastening device comprises a nut and a bolt 1, wherein the outer side wall of the upper half section of the bolt 1 is provided with a one-way thread 11, the outer side wall of the lower half section of the bolt 1 is provided with a two-way thread 12, the nut comprises an upper nut 2 and a lower nut 3, the upper nut 2 is screwed on the upper half section of the bolt 1, the lower nut 3 is screwed on the lower half section of the bolt 1, the turning directions of the upper nut 2 and the lower nut 3 are opposite, the upper nut 2 and the lower nut 3 are both provided with a connecting device 6, the upper nut 2 and the lower nut 3 are screwed through the connecting device 6, the upper nut 2 is provided with a locking device 4, the upper nut 2 is locked with the lower nut 3 through the locking device 4, and the bottom surface of the upper nut 2 and the top surface of the lower nut 3 are.

Upper nut 2 upwards screws in first half from bolt 1 latter half through the screw thread, and upper nut 2 and lower nut 3 revolve to opposite, and lower nut 3 can only screw in bolt 1's latter half, and upper nut 2 and lower nut 3 pass through connecting device 6 spiro union, and elastic plate 33 is fixed at upper nut 2 up end by locking device 4, and the cover has shell 5 after upper nut 2 and 3 spiro unions of lower nut for upper nut 2 is difficult to be become flexible because of factors such as external vibrations with lower nut 3.

Referring to fig. 3 to 5, as an improved embodiment, according to the fastening device of claim 1, the connecting device 6 includes a second thread groove 211 and a hollow stud 31, the upper end surface of the lower nut 3 is provided with the hollow stud 31, the outer thread direction of the hollow stud 31 is opposite to the one-way thread 11, the lower end surface of the upper nut 2 is provided with the second thread groove 211, the second thread groove 211 is located at the outer side of the threaded hole, and the hollow stud 31 is screwed with the second thread groove 211.

The hollow stud 31 is screwed with the second thread groove 211, so the upper nut 2 is screwed with the lower nut 3, the screwing direction of the hollow stud 31 is opposite to that of the one-way thread 11, the upper nut 2 is limited by the screwing direction of the hollow stud 31 when the upper nut 2 wants to rotate downwards, the lower nut 3 needs to be screwed out first to rotate the upper nut 2 downwards, the upper nut 2 is not easy to rotate, and the function of locking the upper nut 2 and the lower nut 3 is realized.

Referring to fig. 2 to 5, as a modified specific embodiment, the upper nut 2 is provided with the one-way internal thread 22 matching the one-way thread 11, and the lower nut 3 is provided with the internal thread 32 opposite to the one-way thread 11. The upper nut 2 is rotated from the lower half to the upper half of the bolt 1.

Because the first half of bolt 1 is one-way screw 11, and the latter half is two-way screw 12, and the upper nut 2 is opposite with lower nut 3 spiral direction, and upper nut 2 can be followed the latter half of bolt 1 and directly rotated to the first half, and lower nut 3 can only screw in the latter half of bolt 1, and two nuts are difficult not hard up.

Referring to fig. 2 to 5, as an improved specific embodiment, a plurality of elastic plates 33 are fixed on an upper end surface of the lower nut 3, a circular hole 331 is formed in an upper end of each elastic plate 33, a plurality of moving grooves 23 are formed in positions of the upper nut 2 corresponding to the elastic plates 33, when the upper nut 2 is not screwed with the lower nut 3, the elastic plates 33 are located at tail portions of the moving grooves 23, the lower nut 3 continues to rotate upward until the lower nut is completely screwed with the upper nut 2, the elastic plates 33 are located at top portions of the moving grooves 23, when the elastic plates 33 reach the top portions of the moving grooves 23, the two elastic plates 33 are folded in a direction away from the bolt 1 until one side end surfaces of the elastic plates 33 abut against the upper end surface of the upper nut 2, and the elastic plates 33 are fastened at positions after being folded by the locking device 4.

The elastic plate 33 is folded to be tightly attached to the upper end face of the upper nut 2, so that the connection between the upper nut 2 and the lower nut 3 is reinforced, and the two nuts are not easy to separate and rotate.

Referring to fig. 2 to 5, as a modified specific embodiment, the locking device 4 includes a thread groove 41 and a second bolt 42, the upper end surface of the upper nut 2 is provided with a plurality of thread grooves 41, the thread grooves 41 are located opposite to the circular hole 331, and the second bolt 42 passes through the circular hole 331 and is in threaded connection with the thread grooves 41.

The locking device 6 comprises a thread groove 41 and a second bolt 42, the second bolt 42 is screwed with the thread groove 41 to limit the elastic plate 33 at the folded position, so that the position of the elastic plate 33 is not easy to change, and the upper nut 2 and the lower nut 3 are not easy to rotate.

Referring to fig. 1, as a modified embodiment, the upper nut 2 and the lower nut 3 are screwed together and then sleeved with a housing 5, the housing 5 is a hollow structure, and the upper end and the lower end of the housing 5 are both provided with a second circular hole 51 for the bolt 1 to pass through.

The shell 5 wraps up the upper nut 2 and the lower nut 3 in the inner cavity, so that the upper nut 2 and the lower nut 3 are not easy to rotate due to external factors such as vibration, the shell 5 isolates external dust and rainwater, the service lives of the two nuts are prolonged, and the cost is saved.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.