CN104791352A

CN104791352A - Looseness preventing fastener

Info

Publication number: CN104791352A
Application number: CN201510230213.8A
Authority: CN
Inventors: 祝建飞
Original assignee: Individual
Current assignee: Nanjing Junwei Innovation Seiko Machinery Co ltd
Priority date: 2015-05-07
Filing date: 2015-05-07
Publication date: 2015-07-22
Anticipated expiration: 2035-05-07
Also published as: CN104791352B

Abstract

The invention discloses a looseness preventing fastener. The looseness preventing fastener comprises a bolt, a first nut, a second nut and a third nut. The bolt is composed of a bolt head and a bolt body. The bolt body is connected with the bolt head, a main groove is formed in the bolt body, and main outer threads are arranged on the bolt body. First inner threads are arranged on the interior of the first nut, the main outer threads are matched with the first inner threads, and first outer threads are arranged on the exterior of the first nut. Second inner threads are arranged on the interior of the second nut and matched with the first outer threads, an auxiliary groove is formed in the second nut, a connecting block is arranged on the outer side of the second nut and provided with a positioning groove, a rotatable baffle is arranged in the positioning groove, and the baffle and the auxiliary groove are located in one plane. Third inner threads are arranged on the interior of the third nut. According to the looseness preventing fastener, as the baffle is clamped in the main groove, relative rotation between the bolt and the first nut is avoided, the fastener is in the effective state all the time accordingly, and the device safety is guaranteed.

Description

A kind of Anti-loose fastener

[technical field]

The present invention relates to the technical field of the technical field of part, particularly fastening piece.

[background technique]

Machinery can use many fastening pieces, on some equipment, as in high ferro, need to ensure that fastening piece can not loosen, otherwise be prone to accidents.Common fastening piece, under long-time vibrations, easily occurs to loosen, causes larger harm, even threaten personal safety to equipment.

[summary of the invention]

Object of the present invention solves the problems of the prior art exactly, proposes a kind of Anti-loose fastener, fastening piece can be made can not to loosen after tightening, ensure that the validity of fastening piece, ensures device security.

For achieving the above object, the present invention proposes a kind of Anti-loose fastener, comprise bolt, first nut, second nut, 3rd nut, described bolt is made up of bolt head and stud, stud is connected with bolt head, stud afterbody has main groove, stud there is main outside thread, the first internal thread is had in described first nut, main outside thread and the first internal thread cooperatively interact, there is the first outside thread first nut outside, the second internal thread is had in described second nut, second internal thread and the first outside thread cooperatively interact, second nut there is auxiliary flute, a contiguous block is had outside second nut, contiguous block there is a locating slot, there is through hole two side with locating slot, a rotating baffle plate is had in locating slot, baffle plate there is positioning hole, a roll pin is installed with in through hole and positioning hole, baffle plate and auxiliary flute are in same plane, baffle plate upper and lower both sides elasticity layer, the 3rd internal thread is had in described 3rd nut.

As preferably, there is the second outside thread described second nut outside, and the second outside thread and the 3rd internal thread cooperatively interact.

As preferably, described 3rd internal thread and main outside thread cooperatively interact.

As preferably, described main groove is positioned on the center line of stud, and auxiliary flute is positioned on the center line of the second nut.

As preferably, described main recess width is identical with auxiliary flute width, and Weir Plate Thickness is identical with auxiliary flute width.

As preferably, described contiguous block is L-shaped, contiguous block and auxiliary flute in the same plane.

As preferably, described main groove length is greater than the total length of the second nut and the 3rd nut.

As preferably, described 3rd nut external diameter is less than the second nut internal diameter.

Beneficial effect of the present invention: the present invention passes through baffle wedge in main groove, avoids relatively rotating between bolt and the first nut, makes fastening piece be in effective status all the time, ensure that the safety of equipment; Baffle plate arranges elasitic layer, makes fastening piece when tightening state, baffle plate all the time with the first nut and the 3rd nut close contact, also can avoid under equipment working state, the trickle vibrations of baffle plate cause damage to the first nut and the 3rd nut simultaneously; Main recess width is identical with auxiliary flute width, and Weir Plate Thickness is identical with auxiliary flute width, makes baffle plate can effectively pin main groove and auxiliary flute, prevents main groove and auxiliary flute from relatively rotating.

Feature of the present invention and advantage will be described in detail by reference to the accompanying drawings by embodiment.

[accompanying drawing explanation]

Fig. 1 is the main pseudosection of the present invention's a kind of Anti-loose fastener first embodiment;

Fig. 2 is the second nut plan view of a kind of Anti-loose fastener of the present invention;

Fig. 3 is the second nut left view of a kind of Anti-loose fastener of the present invention;

Fig. 4 is the fixed block schematic diagram of a kind of Anti-loose fastener of the present invention;

Fig. 5 is the baffle plate schematic diagram of a kind of Anti-loose fastener of the present invention;

Fig. 6 is the main pseudosection of the present invention's a kind of Anti-loose fastener second embodiment.

In figure: 1-bolt, 2-first nut, 3-second nut, 4-the 3rd nut, 11-bolt head, 12-stud, the main outside thread of 13-, the main groove of 15-, 21-first internal thread, 22-first outside thread, 31-second internal thread, 32-second outside thread, 33-contiguous block, 35-auxiliary flute, 36-baffle plate, 37-elasitic layer, 41-the 3rd internal thread, 50-locating slot, 51-through hole, 52-positioning hole, 53-roll pin.

[embodiment]

Embodiment one

Consult Fig. 1, Fig. 2, Fig. 3, Fig. 4 and Fig. 5, a kind of Anti-loose fastener of the present invention, comprise bolt 1, first nut 2, second nut 3, 3rd nut 4, described bolt 1 is made up of bolt head 11 and stud 12, stud 12 is connected with bolt head 11, stud 12 afterbody has main groove 15, stud 12 there is main outside thread 13, the first internal thread 21 is had in described first nut 1, main outside thread 13 and the first internal thread 21 cooperatively interact, there is the first outside thread 22 first nut 2 outside, the second internal thread 31 is had in described second nut 3, second internal thread 31 and the first outside thread 22 cooperatively interact, second nut 3 there is auxiliary flute 35, a contiguous block 33 is had outside second nut 3, contiguous block 33 there is a locating slot 50, there is through hole 51 two side with locating slot 50, a rotating baffle plate 36 is had in locating slot 50, on baffle plate, 36 have positioning hole 52, a roll pin 53 is installed with in through hole 51 and positioning hole 52, baffle plate 36 and auxiliary flute 35 are in same plane, baffle plate about 36 both sides elasticity layer 37, the 3rd internal thread 41 is had in described 3rd nut 4, there is the second outside thread 32 described second nut 3 outside, second outside thread 32 and the 3rd internal thread 41 cooperatively interact, described main groove 15 is positioned on the center line of stud 12, auxiliary flute 35 is positioned on the center line of the second nut 3, described main groove 15 width is identical with auxiliary flute 35 width, baffle plate 36 thickness is identical with auxiliary flute 35 width, described contiguous block 33 is L-shaped, contiguous block 33 is in the same plane with auxiliary flute 35, described main groove 15 length is not less than the total length of the second nut 3 and the 3rd nut 4.

Embodiment two

Consult Fig. 6, the difference of the present embodiment and the first embodiment is that the second nut 3 outside does not have the second outside thread the 32, three internal thread 41 to cooperatively interact with main outside thread 13, and the 3rd nut 4 external diameter is less than the second nut 3 internal diameter.

Working procedure of the present invention:

A kind of Anti-loose fastener of the present invention in the course of the work, select the bolt 1 of suitable dimension through needing fastening part, bolt 1 and the first nut 2 are tightened, second nut 3 is screwed on the first nut 2, make auxiliary flute 35 and main groove 15 in the same plane and flap shutter 36 to level time baffle plate 36 and the first nut 2 close contact, 3rd nut 4 is screwed on, baffle plate 36 is no longer rotated.Baffle plate 36 is stuck in main groove 15 with in auxiliary flute 35, prevents relatively rotating between bolt 1 and the first nut 2, makes fastening piece effective all the time, ensure that the safe operation of equipment; Baffle plate 36 is arranged elasitic layer 37, make to be in same plane and baffle plate 36 cannot without time parallel with the first nut 2 bottom surface under External Force Acting when auxiliary flute 35 and main groove 15, can make elasitic layer 37 that micro-deformation occurs after being screwed on by 3rd nut 4 and make baffle plate 36 and the first nut 2 close contact, also can avoid under equipment working state, the trickle vibrations of baffle plate 36 cause damage to the first nut 2 and the 3rd nut 4 simultaneously; Main groove 15 width is identical with auxiliary flute 35 width, and baffle plate 36 thickness is identical with auxiliary flute 35 width, makes baffle plate 36 effectively can pin main groove 15 and auxiliary flute 35, prevents main groove 15 from relatively rotating with auxiliary flute 35 and fastening piece was lost efficacy.

Above-described embodiment is to explanation of the present invention, is not limitation of the invention, anyly all belongs to protection scope of the present invention to the scheme after simple transformation of the present invention.

Claims

1. an Anti-loose fastener, it is characterized in that: comprise bolt (1), first nut (2), second nut (3), 3rd nut (4), described bolt (1) is made up of bolt head (11) and stud (12), stud (12) is connected with bolt head (11), stud (12) afterbody has main groove (15), stud (12) there is main outside thread (13), the first internal thread (21) is had in described first nut (1), main outside thread (13) and the first internal thread (21) cooperatively interact, there is the first outside thread (22) first nut (2) outside, the second internal thread (31) is had in described second nut (3), second internal thread (31) and the first outside thread (22) cooperatively interact, second nut (3) there is auxiliary flute (35), there is a contiguous block (33) in second nut (3) outside, contiguous block (33) there is a locating slot (50), locating slot (50) two side there is through hole (51), a rotating baffle plate (36) is had in locating slot (50), on baffle plate, (36) have positioning hole (52), a roll pin (53) is installed with in through hole (51) and positioning hole (52), baffle plate (36) and auxiliary flute (35) are in same plane, baffle plate (36) is both sides elasticity layer (37) up and down, the 3rd internal thread (41) is had in described 3rd nut (4).

2. a kind of Anti-loose fastener as claimed in claim 1, it is characterized in that: there is the second outside thread (32) described second nut (3) outside, the second outside thread (32) and the 3rd internal thread (41) cooperatively interact.

3. a kind of Anti-loose fastener as claimed in claim 1, is characterized in that: described 3rd internal thread (41) and main outside thread (13) cooperatively interact.

4. a kind of Anti-loose fastener as claimed in claim 1, it is characterized in that: described main groove (15) is positioned on the center line of stud (12), and auxiliary flute (35) is positioned on the center line of the second nut (3).

5. a kind of Anti-loose fastener as claimed in claim 1, it is characterized in that: described main groove (15) width is identical with auxiliary flute (35) width, and baffle plate (36) thickness is identical with auxiliary flute (35) width.

6. a kind of Anti-loose fastener as claimed in claim 1, is characterized in that: described contiguous block (33) is L-shaped, and contiguous block (33) is in the same plane with auxiliary flute (35).

7. a kind of Anti-loose fastener as claimed in claim 1, is characterized in that: described main groove (15) length is not less than the total length of the second nut (3) and the 3rd nut (4).

8. a kind of Anti-loose fastener as claimed in claim 3, is characterized in that: described 3rd nut (4) external diameter is less than the second nut (3) internal diameter.