CN218844799U

CN218844799U - Anti-loosening bolt

Info

Publication number: CN218844799U
Application number: CN202223266441.5U
Authority: CN
Inventors: 沈一民; 李允贻; 邵建华
Original assignee: Shanghai Huanya Tool Factory
Current assignee: Shanghai Huanya Tool Factory
Priority date: 2022-12-06
Filing date: 2022-12-06
Publication date: 2023-04-11
Anticipated expiration: 2032-12-06

Abstract

The utility model discloses a check bolt, which belongs to the technical field of bolts, and comprises a screw rod, a boss, a screwing end and a thread area, wherein the boss is arranged at the upper end of the screw rod and is fixed at the lower end of the screwing end, and the thread area is arranged on the surface of the end part of the screw rod; further comprising: the first type nut is screwed on the threaded area on the screw rod, the side edge of the first type nut is provided with the second type nut, the second type nut is also screwed on the threaded area on the screw rod, and the opposite surfaces of the first type nut and the second type nut are provided with meshing convex teeth. This check bolt can detach the cushion of tooth mutually supporting with the nut when using, utilizes nut terminal surface meshing dogtooth to replace the cushion of tooth, improves holistic locking effect reduction manufacturing cost.

Description

Anti-loose bolt

Technical Field

The utility model relates to a bolt technical field specifically is a check bolt.

Background

At present, the importance of the check bolt is increasingly highlighted in a required connecting pair in each industry along with the continuous development of science and technology, particularly in important parts, such as high-frequency vibration caused by high speed in the operation of a high-speed train contact network, so that a common thread structure causes loosening of a nut or even falling of the nut due to vibration, the safe operation of a train is seriously damaged, and the check bolt is usually selected for preventing the nut from loosening.

However, the existing bolt has the following technical problems:

when the existing bolt is used, for example, the tooth form angle change of 'Shibijia' in the United states is utilized to meet the anti-loose requirement, the tooth form washer of 'Luodi' in Sweden utilizes the wedge locking mode to form anti-loose, the domestic 'Tang' screw thread utilizes the positive and negative rotation of the screw thread to meet the anti-loose requirement, and although the anti-loose effect can be achieved, the integral manufacturing cost is higher or the integral anti-loose capability is required to be improved.

We have therefore proposed a lockbolt in order to solve the problems set out above.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a check bolt, current bolt when using on the existing market that the above-mentioned background art provided in order to solve, if the american "execute must firm" utilizes the profile of tooth angular variation to reach locking requirement, "luodi firm" profile of tooth packing ring of sweden, it is locking mode formation locking to utilize wedge system, internal "tang" screw thread utilizes the screw thread positive and negative rotation to reach locking requirement, though the locking effect is played to the above-mentioned homoenergetic, but the problem that the higher or holistic locking ability of holistic manufacturing cost remains to improve.

In order to achieve the above purpose, the utility model provides a following technical scheme: a check bolt comprises a screw, a boss, a screwing end and a threaded area, wherein the boss is arranged at the upper end of the screw and fixed at the lower end of the screwing end, and the threaded area is arranged on the surface of the end part of the screw;

further comprising:

the first type nut is screwed on the threaded area on the screw, the side edge of the first type nut is provided with the second type nut, the second type nut is also screwed on the threaded area on the screw, and the opposite surfaces of the first type nut and the second type nut are provided with meshing convex teeth.

Preferably, the thread area is composed of a locking double thread and a working single thread, the locking double thread in the thread area is a positive and negative rotation thread, and the working single thread is a single-rotation thread.

Preferably, a type nut and two type nuts are laminated each other, and a type nut and two type nuts all set up to hexagon structure.

Through adopting above-mentioned technical scheme, utilize one type nut can conveniently twist on work single thread through two screw thread sections, two type nuts can make things convenient for it to twist on locking two screw threads.

Preferably, the inner side surface of the two-type nut is provided with a recess.

Through adopting above-mentioned technical scheme, through the recess that two type nut insides have to can compensate main thread length because of the size influence that the tolerance brought.

Preferably, the opposite surfaces of the first type nut and the second type nut are provided with meshing convex teeth which are uniformly distributed on the surfaces of the first type nut and the second type nut.

By adopting the technical scheme, the tooth pad between the two nuts can be removed through the meshing convex teeth on the opposite surfaces of the first-type nut and the second-type nut, and the tooth pad is replaced by the end surface meshing convex teeth, so that the whole anti-loosening effect is improved.

Compared with the prior art, the beneficial effects of the utility model are that: the anti-loose bolt can remove the tooth pad matched with the nut when in use, and the meshing teeth on the end surface of the nut are used for replacing the tooth pad, so that the integral anti-loose effect is improved, and the manufacturing cost is reduced;

1. the nut is provided with the meshing convex teeth, the meshing convex teeth are uniformly distributed on the opposite surfaces of the first-type nut and the second-type nut, so that the stability between the first-type nut and the second-type nut can be improved, a tooth pad between the two nuts is removed, the end surface meshing convex teeth of the first-type nut and the second-type nut are used for replacing the end surface meshing convex teeth, the anti-loosening effect is improved, the manufacturing cost of the bolt is reduced, the two nuts with different rotation directions are integrated when the nut is used, the double interlocking anti-loosening effect is achieved by combining the nut with a screw, and meanwhile, the original tensile strength of a front-end cylindrical single-thread screw is ensured;

2. the concave cavities are arranged, and the size influence of the length of the main thread due to tolerance can be compensated through the concave cavities arranged on the inner sides of the two-type nuts.

Drawings

FIG. 1 is a schematic view of the overall three-dimensional structure of the present invention;

FIG. 2 is a schematic view of the bottom perspective structure of the present invention;

FIG. 3 is a schematic view of the separated three-dimensional structure of the screw rod, the first type nut and the second type nut of the present invention;

FIG. 4 is a schematic view of the three-dimensional structure of the first type nut and the second type nut of the present invention;

fig. 5 is an enlarged schematic view of a portion a in fig. 4 according to the present invention.

In the figure: 1. a screw; 2. a boss; 3. screwing the end head; 4. a threaded region; 401. locking double threads; 402. working single thread; 5. a first type nut; 6. a second type nut; 7. the convex teeth are engaged.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-5, the present invention provides a technical solution: a check bolt comprises a screw 1, a boss 2, a screwing end 3 and a threaded area 4, wherein the boss 2 is arranged at the upper end of the screw 1, the boss 2 is fixed at the lower end of the screwing end 3, and the threaded area 4 is arranged on the surface of the end part of the screw 1; the first type nut 5 is screwed on the threaded area 4 on the screw rod 1, the side edge of the first type nut 5 is provided with a second type nut 6, the second type nut 6 is also screwed on the threaded area 4 on the screw rod 1, and the opposite surfaces of the first type nut 5 and the second type nut 6 are provided with engaging convex teeth 7. The thread area 4 is composed of a locking double thread 401 and a working single thread 402, the locking double thread 401 on the thread area 4 is a positive and negative screw thread, and the working single thread 402 is a single screw thread. First type nut 5 and two type nuts 6 are laminated each other, and first type nut 5 and two type nuts 6 all set up to hexagon structure. The inner side of the two-type nut 6 is provided with a recess. The opposite surfaces of the first type nut 5 and the second type nut 6 are provided with meshing convex teeth 7, and the meshing convex teeth 7 are uniformly distributed on the surfaces of the first type nut 5 and the second type nut 6.

As shown in fig. 3-5, the screw 1 is respectively provided with a locking double thread 401 and a working single thread 402 on a cylinder with the same cross section, the opposite end surfaces of a first type nut 5 and a second type nut 6 are respectively engraved with anti-loose meshed convex teeth 7 with the width and depth precisely calculated, the first type nut 5 is selected according to the national standard, the position engraved with the composite thread is used as a locking nut according to the national standard second type nut 6, after the first type nut 5 and the second type nut 6 are screwed into a thread area 4 on the screw 1, the first type nut 5 and the second type nut 6 can be clamped tightly through the meshed convex teeth 7 on the opposite surfaces of the first type nut 5 and the second type nut 6, thereby a tooth pad between the two nuts is removed, the meshed convex teeth 7 on the end surfaces of the first type nut 5 and the second type nut 6 are used for replacing, the anti-loose effect is better, and the purpose of reducing the manufacturing cost is achieved, the inner side of the second type nut 6 is provided with a recess, and the size influence of the main thread length caused by tolerance can be compensated by the recess setting.

The working principle is as follows: when the anti-loose bolt is used, firstly, according to the figures 1-5, a first type nut 5 is screwed in the forward direction to enter a working single thread 402 after passing through a locking double thread 401, then a second type nut 6 is screwed in the reverse direction to be screwed in the bottom of the locking double thread 401 and not screwed in the working single thread 402, the end surface meshing convex teeth 7 of the first type nut 5 and the second type nut 6 are meshed and contacted with each other, the stability of the first type nut 5 and the second type nut 6 is ensured by utilizing the meshing convex teeth 7 on the first type nut 5 and the second type nut 6, when the bolt is subjected to a vibrating loosening force during use, the first type nut 5 is pressed against the second type nut 6 when being screwed out, so that the second type nut 6 and the first type nut 5 are pressed more tightly; on the contrary, if the first type nut 5 is rotated far away from the second type nut 6, the first type nut 5 locks the object.

Those not described in detail in this specification are within the skill of the art.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims

1. A check bolt comprises a screw (1), a boss (2), a screwing end (3) and a threaded area (4), wherein the boss (2) is arranged at the upper end of the screw (1), the boss (2) is fixed at the lower end of the screwing end (3), and the threaded area (4) is arranged on the surface of the end part of the screw (1);

it is characterized by also comprising:

the first type nut (5) is screwed on the threaded area (4) on the screw rod (1), the side edge of the first type nut (5) is provided with the second type nut (6), the second type nut (6) is also screwed on the threaded area (4) on the screw rod (1), and the opposite surfaces of the first type nut (5) and the second type nut (6) are provided with meshing convex teeth (7).

2. A check bolt as defined in claim 1, wherein: the thread area (4) is composed of a locking double thread (401) and a working single thread (402), the locking double thread (401) on the thread area (4) is a positive and negative rotation direction thread, and the working single thread (402) is a single rotation thread.

3. A check bolt as defined in claim 1, wherein: the first type nut (5) and the second type nut (6) are mutually attached, and the first type nut (5) and the second type nut (6) are both arranged to be of a hexagonal structure.

4. A check bolt as defined in claim 1, wherein: the inner side surface of the two-type nut (6) is provided with a concave hole.

5. A check bolt as defined in claim 1, wherein: the opposite surfaces of the first type nut (5) and the second type nut (6) are respectively provided with a meshing convex tooth (7), and the meshing convex teeth (7) are uniformly distributed on the surfaces of the first type nut (5) and the second type nut (6).