Vibration-loosening-resistant fastener

Abstract

The utility model discloses an anti-vibration loosening fastener which comprises a screw and a nut, a plurality of anti-loosening clamping grooves are formed in the surface of a threaded section of the screw at equal intervals in the length direction of the screw, and the nut is composed of an upper nut component, a middle sleeve component and a lower nut component. The middle sleeve piece is arranged between the upper nut component and the lower nut component, the upper nut component, the middle sleeve piece and the lower nut component are connected and fixed together through screws, the middle sleeve piece is composed of a first component, a second component and a lock pin mechanism, and the lock pin mechanism is arranged between the first component and the second component; during operation, the lock pin mechanism on the middle sleeve piece is matched with the anti-loosening clamping groove in the screw rod, so that the nut can be effectively prevented from loosening, when the lock pin mechanism operates, the tension spring contracts to drive the lock rod to be horizontal, the lock rod is clamped into the anti-loosening clamping groove, the nut cannot rotate, and meanwhile, the lock pin mechanism is prevented from being loosened. When the fastener is disassembled and assembled, redundant steps are not needed, and the disassembling and assembling efficiency is higher.

Description

TECHNICAL FIELD

[0001] The utility model relates to fastener technical field, concretely is a fastener of anti-vibration loosening. BACKGROUND

[0002] Fastener is the mechanical part that two components or structure are fixed and connected fast, its application is more extensive, not only is applied in mechanical connection structure field, and also uses a lot in energy, electron, electric appliance, chemical industry, metallurgy, mould industry etc. The most common fastener in daily life is bolt, in the connecting process of bolt, on the device of motion or the connecting assembly that is easy to vibrate, is easy to loosen after using for a period of time, and the connecting performance gradually reduces along with the extension of use time, and there is certain hidden danger, although some bolts that prevent loosening have appeared now, but it also increases the corresponding step in the installation and dismounting process, makes the dismounting efficiency reduce. SUMMARY

[0003] The utility model discloses a fastener of anti-vibration loosening to solve the problems in prior art.

[0004] To achieve the above object, the utility model provides the following technical scheme: a fastener of anti-vibration loosening, including screw rod and nut, the surface of the threaded section of screw rod is opened along the length direction of screw rod and is equidistant and is set with a plurality of anti-loosening clamping groove, the nut is composed of upper nut component, middle sleeve and lower nut component, the middle sleeve is located between upper nut component and lower nut component, upper nut component, middle sleeve and lower nut component are fixed together through screw connection, the middle sleeve is composed of component one, component two and lock pin mechanism, the lock pin mechanism is arranged between component one and component two, the end of component two is opened and is set with lock pin mechanism installation groove, the lock pin mechanism is composed of lock rod and tension spring, the lock rod is rotatably installed in lock pin mechanism installation groove, and the tension spring is fixedly installed between lock rod and component two.

[0005] Preferably, two sides of the middle sleeve are each provided with a screw assembly hole two, two sides of the upper nut component are each provided with a screw assembly hole one, and two sides of the lower nut component are each provided with a screw hole.

[0006] Preferably, the top surface and the bottom surface of the middle sleeve are each provided with four positioning protrusions, the bottom surface of the upper nut component is provided with four positioning holes, and the top surface of the lower nut component is provided with four positioning holes.

[0007] Preferably, the length of the anti-loosening clamping groove is greater than the length of the threaded section of the screw rod.

[0008] Compared with the prior art, the utility model discloses the beneficial effect is: the utility model discloses when operating, through the lock pin mechanism cooperation anti -unscrewing slot on screw rod on the middle sleeve spare, can effectively prevent nut loosening, lock pin mechanism when operating, tension spring contracts and drives lock bar level, and then make lock bar and enter anti -unscrewing slot, so that the nut cannot rotate, when the nut is sleeved to screw rod, need to use spanner or clamp the middle section of nut, make lock bar press into lock pin mechanism installation groove, after taking down spanner or clamp, tension spring contracts and drives lock bar rotation, if lock bar and anti -unscrewing slot just correspond, lock bar will enter anti -unscrewing slot, if lock bar and anti -unscrewing slot are misaligned, then need nut loosening and rotate a certain angle and make anti -unscrewing slot and lock bar correspond, when disassembling the nut, also need to make lock bar press into lock pin mechanism installation groove, in conclusion, the fastener of the utility model does not need extra steps when disassembling, and the disassembling efficiency is higher;

[0009] The positioning protrusions on the middle sleeve spare cooperate with the positioning holes on the upper nut member and the lower nut member, so that the connection strength between the three is increased, and the assembly between the three is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0010] The accompanying drawings are included to provide a further understanding of the utility model, and constitute a part of the specification, and are used together with embodiments of the utility model to explain the utility model, and do not constitute the limitation to the utility model. In the drawings:

[0011] Figure 1 It is the whole structure schematic view of the utility model;

[0012] Figure 2 It is the structure schematic view of screw rod of the utility model;

[0013] Figure 3 It is the structure schematic view of upper nut member of the utility model;

[0014] Figure 4 It is the structure schematic view of middle sleeve spare of the utility model;

[0015] Figure 5 It is the combined structure schematic view of member two and lock pin mechanism of the utility model;

[0016] Figure 6 It is the structure schematic view of lower nut member of the utility model.

[0017] In the drawing: 1, screw rod; 2, nut; 3, anti -unscrewing slot; 4, upper nut member; 5, positioning hole; 6, screw assembly hole one; 7, member one; 8, member two; 9, screw assembly hole two; 10, positioning protrusion; 11, lock pin mechanism; 12, lock pin mechanism installation groove; 13, lock bar; 14, tension spring; 15, lower nut member; 16, screw hole. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0019] Please refer to Figures 1-6 In the embodiments of the present application, the fastener capable of resisting vibration and loosening includes a screw rod 1 and a nut 2. A plurality of anti-loosening clamping grooves 3 are equidistantly formed on the surface of the threaded section of the screw rod 1 along the length direction of the screw rod 1. The nut 2 is composed of an upper nut component 4, a middle sleeve component and a lower nut component 15. The middle sleeve component is arranged between the upper nut component 4 and the lower nut component 15. The upper nut component 4, the middle sleeve component and the lower nut component 15 are fixed together by screw connection. The middle sleeve component is composed of a component one 7, a component two 8 and a lock pin mechanism 11. The lock pin mechanism 11 is arranged between the component one 7 and the component two 8. The end of the component two 8 is provided with a lock pin mechanism mounting groove 12. The lock pin mechanism 11 is composed of a lock rod 13 and a tension spring 14. The lock rod 13 is rotatably arranged in the lock pin mechanism mounting groove 12. The tension spring 14 is fixedly arranged between the lock rod 13 and the component two 8. The lock pin mechanism 11 on the middle sleeve component cooperates with the anti-loosening clamping grooves 3 on the screw rod 1, so that the nut 2 can be effectively prevented from loosening. When the lock pin mechanism 11 operates, the tension spring 14 is contracted to drive the lock rod 13 to be horizontal, so that the lock rod 13 is clamped into the anti-loosening clamping grooves 3, thereby preventing the nut 2 from rotating. When the nut 2 is sleeved on the screw rod 1, a wrench or pliers is used to clamp the middle section of the nut 2 to press the lock rod 13 into the lock pin mechanism mounting groove 12. After the wrench or pliers is removed, the tension spring 14 is contracted to drive the lock rod 13 to rotate. If the lock rod 13 is just corresponding to the anti-loosening clamping grooves 3, the lock rod 13 is clamped into the anti-loosening clamping grooves 3. If the lock rod 13 is misaligned with the anti-loosening clamping grooves 3, the nut 2 needs to be loosened and rotated by a certain angle to make the anti-loosening clamping grooves 3 corresponding to the lock rod 13. When the nut 2 is disassembled, the lock rod 13 also needs to be pressed into the lock pin mechanism mounting groove 12. In summary, the fastener of the present application does not need additional steps during disassembly and assembly, and the disassembly and assembly efficiency is higher.

[0020] The middle sleeve set is provided with a screw assembly hole 2 on each side, the upper nut member 4 is provided with a screw assembly hole 1 on each side, and the lower nut member 15 is provided with a screw hole 16 on each side.

[0021] The middle sleeve set is provided with four positioning protrusions 10 on the top surface and the bottom surface, the upper nut member 4 is provided with four positioning holes 5 on the bottom surface, and the lower nut member 15 is provided with four positioning holes 5 on the top surface, so that the connection strength among the three is increased, and the assembly among the three is facilitated.

[0022] The length of the anti-loosening slot 3 is greater than the length of the threaded section of the screw rod 1, so that the nut 2 can be kept in the effective anti-vibration loosening range during the assembly of the fastener.

[0023] The working principle of the utility model is as follows: when the utility model is running, the lock pin mechanism 11 on the middle sleeve set cooperates with the anti-loosening slot 3 on the screw rod 1, so that the nut 2 can be effectively prevented from loosening, when the lock pin mechanism 11 is running, the tension spring 14 is contracted to drive the lock rod 13 to be horizontal, so that the lock rod 13 is clamped into the anti-loosening slot 3, so that the nut 2 cannot rotate, when the nut 2 is sleeved on the screw rod 1, a wrench or a clamp is needed to hold the middle section of the nut 2, the lock rod 13 is pressed into the lock pin mechanism installation groove 12, after the wrench or the clamp is removed, the tension spring 14 is contracted to drive the lock rod 13 to rotate, if the lock rod 13 corresponds to the anti-loosening slot 3, the lock rod 13 will be clamped into the anti-loosening slot 3, if the lock rod 13 is misaligned with the anti-loosening slot 3, the nut 2 needs to be loosened and rotated by a certain angle to make the anti-loosening slot 3 correspond to the lock rod 13, when the nut 2 is disassembled, the lock rod 13 also needs to be pressed into the lock pin mechanism installation groove 12, in summary, the fastener of the utility model does not need additional steps during disassembly, and the disassembly efficiency is higher.

[0024] The positioning protrusions 10 on the middle sleeve set cooperate with the positioning holes 5 on the upper nut member 4 and the lower nut member 15, so that the connection strength among the three is increased, and the assembly among the three is facilitated.

[0025] Finally, it should be noted that: the above only for the preferred embodiments of the utility model, and not for limiting the utility model, although the utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it still can modify the technical scheme recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. Anti-vibration loose fastener comprising a screw (1) and a nut (2), characterized in that: The surface of the thread segment of the screw rod (1) is provided with a plurality of anti-loosening grooves (3) at equal intervals along the length direction of the screw rod (1), the nut (2) is composed of an upper nut component (4), a middle sleeve component and a lower nut component (15), the middle sleeve component is arranged between the upper nut component (4) and the lower nut component (15), the upper nut component (4), the middle sleeve component and the lower nut component (15) are fixed together by screw connection, the middle sleeve component is composed of a component one (7), a component two (8) and a lock pin mechanism (11), the lock pin mechanism (11) is arranged between the component one (7) and the component two (8), the end of the component two (8) is provided with a lock pin mechanism mounting groove (12), the lock pin mechanism (11) is composed of a lock rod (13) and a tension spring (14), the lock rod (13) is rotatably mounted in the lock pin mechanism mounting groove (12), and the tension spring (14) is fixedly mounted between the lock rod (13) and the component two (8).

2. A vibration-loosening resistant fastener according to claim 1, wherein: Two screw assembly holes two (9) are respectively and completely provided on the two sides of the middle sleeve component, a screw assembly hole one (6) is respectively and completely provided on the two sides of the upper nut component (4), and a screw hole (16) is respectively and completely provided on the two sides of the lower nut component (15).

3. The anti-vibration loose fastener of claim 1, wherein: Four positioning protrusions (10) are respectively arranged on the top surface and the bottom surface of the middle sleeve component, four positioning holes (5) are arranged on the bottom surface of the upper nut component (4), and four positioning holes (5) are arranged on the top surface of the lower nut component (15).

4. The anti-vibration loose fastener of claim 1, wherein: The length of the anti-loosening groove (3) is greater than the length of the thread segment of the screw rod (1).

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