Bidirectional interlocking thread fastening assembly and structure thereof

Abstract

The invention discloses a bidirectional interlocking threaded fastening assembly and a structure thereof. The bidirectional interlocking threaded fastening assembly comprises a first fastening piece, a second fastening piece and a third fastening piece. The first fastener is provided with an external thread and an internal thread, the external thread is a right-hand thread, namely, the clockwise screwing direction is the screwing direction; the internal threads are left-hand threads, namely the anticlockwise screwing direction is the screwing direction. The second fastening piece is matched with the external thread of the first fastening piece and is screwed down by clockwise rotation; and the third fastener is matched with the internal thread of the first fastener and is screwed down by counterclockwise rotation. The second fastening piece and the third fastening piece are tightly screwed and then attached to each other. When the second fastening piece is loosened anticlockwise due to vibration, the third fastening piece is pushed to rotate in the screwing direction of the third fastening piece, and due to the fact that the third fastening piece is provided with a left-hand thread, the third fastening piece is further pressed in the axial direction through rotation, and the third fastening piece and the second fastening piece are mutually pressed to form interlocking; when the third fastening piece is loosened clockwise due to vibration, the second fastening piece is pushed to rotate clockwise, and the second fastening piece is further tightened due to the right-hand threads and is mutually pressed with the third fastening piece, so that interlocking is realized as well. The anti-loosening device achieves anti-loosening through a two-way interlocking mechanism, and has the advantages of being simple in structure, low in manufacturing cost, free of additional parts, capable of being repeatedly used and extremely high in reliability and stability.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical fasteners, and in particular to a thread fastening structure with an anti-loosening function. Background Art

[0002] Traditional threaded fasteners, such as bolts and nuts, are prone to loosening under vibration, resulting in connection failure. Existing anti-loosening measures, such as spring washers, nylon locking nuts, double nuts, other structures built into nuts, nuts and studs or bolts with other structures built into them, etc., have problems such as complex structures, high costs or limited anti-loosening effects. Therefore, a simple anti-loosening fastening structure with extremely high reliability and stability is needed. Summary of the invention

[0003] The object of the present invention is to provide a bidirectional interlocking thread fastening structure, through the reverse design of internal and external threads, so that the fastening components can be locked with each other during vibration to prevent loosening. Technical solution:

[0004] The anti-loosening thread fastening assembly of the present invention comprises:

[0005] The first fastener 1 is provided with an external thread 5 and an internal thread 6, wherein the external thread 5 is a right-hand thread and is tightened in a clockwise direction; the internal thread 6 is a left-hand thread and is tightened in a counterclockwise direction.

[0006] The second fastener 2 is provided with an internal thread 6, which is right-handed and cooperates with the external thread 5 of the first fastener 1 and is tightened by rotating clockwise.

[0007] The third fastener 3 is provided with an external thread 5, which is left-handed and cooperates with the internal thread 6 of the first fastener 1 and is tightened by rotating counterclockwise. Anti-loosening principle:

[0008] When the second fastener 2 is loosened counterclockwise due to vibration, the third fastener 3 is driven to rotate counterclockwise, and the third fastener 3 is further tightened due to the left-handed thread. At the same time, the second fastener 2 and the third fastener 3 are pressed against each other to form an interlocking.

[0009] When the third fastener 3 is loosened clockwise due to vibration, it will push the second fastener 2 to rotate clockwise, and the second fastener 2 will be further tightened due to the right-hand thread. At the same time, the third fastener 3 and the second fastener 2 are pressed against each other to achieve interlocking.

[0010] Or the second fastener 2 and the third fastener 3 trigger each other at the same time and press each other to achieve interlocking. Disassembly method:

[0011] First, slightly twist the second fastener 2 clockwise to tighten it slightly and release the interlocking.

[0012] Then unscrew the third fastener 3 clockwise.

[0013] Finally, unscrew the second fastener 2 in a counterclockwise direction as usual. Beneficial effects:

[0014] Bidirectional interlocking: No matter whether the second fastener 2 or the third fastener 3 loosens due to vibration, it will trigger the locking action of the other fastener, or both fasteners will be triggered at the same time to achieve interlocking. The anti-loosening effect is very reliable and has extremely high stability.

[0015] Simple structure: no need to change the nut and stud structure, reducing costs.

[0016] Reusable: It can be reinstalled after disassembly without affecting the anti-loosening performance. Additional notes:

[0017] Preferably, the second fastener 2 and the third fastener 3 are in close contact with each other after being tightened.

[0018] Optionally, in order to increase friction or for other purposes, a gasket or other material is provided between the second fastener 2 and the third fastener 3 , and they are in close contact with the gasket or other material after being tightened together.

[0019] Optionally, the contact surfaces of the second fastener 2 and the third fastener 3 in the tightened state are provided with anti-slip teeth to increase the friction between them.

[0020] Optionally, the first fastener 1 may be a bolt, or a stud or a screw, or other components with internal and external threads.

[0021] Preferably, the first fastener 1 is a stud, a screw or other threaded member on other members that cannot be removed or twisted.

[0022] Optionally, if the external thread 5 of the first fastener 1 is set as a left-hand thread, then the internal thread 6 of the first fastener 1 is set as a right-hand thread.

[0023] Preferably, if the external thread 5 of the first fastener 1 is set as a left-handed thread, then the internal thread 6 of the second fastener 2 is set as a left-handed thread, and the thread sizes of the two are matched.

[0024] Preferably, if the internal thread 6 of the first fastener 1 is set as a right-hand thread, then the external thread 5 of the third fastener 3 is set as a right-hand thread, and the thread sizes of the two are matched.

[0025] Optionally, a threaded sleeve or other materials are provided between the external thread 5 of the first fastener 1 and the internal thread 6 of the second fastener 2 .

[0026] Optionally, a threaded sleeve or other materials are provided between the internal thread 6 of the first fastener 1 and the external thread 5 of the third fastener 3 .

[0027] The external thread 5 and the internal thread 6 of the first fastener 1 are coaxially arranged to form an integrated structure.

[0028] Optionally, the hole of the internal thread 6 of the first fastener 1 may be a blind hole or a through hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is an assembly schematic diagram of the present invention;

[0030] Figure 2 is an assembly diagram of the present invention;

[0031] Figure 3 It is a cross-sectional perspective view of the second fastener 2 and the third fastener 3 of the present invention.

[0032] Figure 4 It is a cross-sectional front view of the second fastener 2 and the third fastener 3 of the present invention.

[0033] In the accompanying drawings, the same parts or the same parts of different parts are all marked with the same reference numerals. In addition, the accompanying drawings are not drawn to scale, and the actual product is not limited thereto.

[0034] In the accompanying drawings, the heads of the first fastener 1 and the third fastener 3 and the outer side of the second fastener 2 are drawn as regular hexagons only for ease of understanding. The actual product is not limited to this. Any heads of the first fastener 1 and the third fastener 3, and any outer side structure of the second fastener 2 that can be twisted by hand or other tools fall within the scope of the present invention.

[0035] It should also be noted that, in order to more vividly illustrate the structure of the present invention, the fastened object 4 is only shown in a cross-sectional view, and is merely an example. In fact, the fastened object is not limited thereto. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] The present invention is further described with reference to the accompanying drawings, Figure 1As shown, a bidirectional interlocking threaded fastening assembly and its structure include a first fastener 1, a second fastener 2 and a third fastener 3. The first fastener 1 is provided with an external thread 5 and an internal thread 6, wherein the external thread 5 is a right-hand thread, and the rotation direction is clockwise tightening; the internal thread 6 is a left-hand thread, and the rotation direction is counterclockwise tightening. The internal thread 6 of the second fastener 2 is a right-hand thread, which cooperates with the external thread 5 of the first fastener 1 and is tightened by clockwise rotation. The external thread 5 of the third fastener 3 is a left-hand thread, which cooperates with the internal thread 6 of the first fastener 1 and is tightened by counterclockwise rotation.

[0038] During assembly, first pass the first fastener 1 through the object 4 to be fastened, and then tighten the second fastener 2 clockwise to a preset torque. Preferably, fix the second fastener 2 with a tool, and then tighten the third fastener 3 counterclockwise to make it close to the second fastener 2 until the preset torque is reached. In a vibration environment, if the second fastener 2 is loosened counterclockwise, the third fastener 3 will be tightened counterclockwise; if the third fastener 3 is loosened clockwise, the second fastener 2 will be tightened clockwise. That is, if any of the second fasteners 2 and the third fastener 3 is loose, the interlocking mechanism will be triggered to prevent loosening and achieve the purpose of tightening.

[0039] When disassembling, first slightly twist the second fastener 2 clockwise to slightly tighten it and release the interlock; then twist out the third fastener 3 clockwise; and finally twist out the second fastener 2 normally in the counterclockwise direction.

[0040] At this point, those skilled in the art should recognize that, although the exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications that conform to the principles of the present invention can still be directly determined or derived based on the content disclosed in the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and identified as covering all these other variations or modifications.

Claims

1. A bidirectional interlocking threaded fastening assembly and structure thereof, characterized in that: include: The first fastener is provided with an external thread and an internal thread, wherein the external thread and the internal thread have opposite rotation directions, that is, if the external thread is a right-hand thread, the internal thread is a left-hand thread; conversely, if the external thread is a left-hand thread, the internal thread is a right-hand thread; A second fastener is provided with an internal thread, which cooperates with the external thread of the first fastener, and the internal thread of the second fastener has the same rotation direction as the external thread of the first fastener; The third fastener is provided with an external thread which cooperates with the internal thread of the first fastener, and the rotation direction of the external thread of the third fastener is the same as that of the internal thread of the first fastener.

2. A bidirectional interlocking threaded fastening assembly and structure thereof as claimed in claim 1, characterized in that: The external thread and the internal thread of the first fastener are coaxially arranged to form an integrated structure.

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