CN214888258U

CN214888258U - Bolt and nut fastener with anti-loosening and anti-falling functions

Info

Publication number: CN214888258U
Application number: CN202121124069.7U
Authority: CN
Inventors: 王健康
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-05-24
Filing date: 2021-05-24
Publication date: 2021-11-26
Anticipated expiration: 2031-05-24

Abstract

The utility model discloses a bolt and nut fastener with locking function that drops that moves relates to bolt technical field, the one end an organic whole that keeps away from the nut including the bolt is provided with reverse threaded rod, nut an has been cup jointed to the lateral wall screw thread of bolt, be provided with orthodontic screw thread an on the threaded rod of bolt, be provided with orthodontic screw thread b that corresponds with orthodontic screw thread an on nut an's the inside wall, nut b has been cup jointed to the screw thread on reverse threaded rod's the lateral wall. The utility model discloses in, set up reverse threaded rod through the one end of keeping away from the nut at the bolt, the screw thread cup joints one side that nut a on the bolt lateral wall is close to nut b and sets up inclined plane sawtooth an, and the screw thread cup joints one side that nut b on reverse threaded rod lateral wall is close to nut a and is provided with the inclined plane sawtooth b that corresponds with inclined plane sawtooth a, utilizes inclined plane sawtooth an and inclined plane sawtooth b cooperation, has solved the problem that the bolt and nut lead to becoming flexible and droing because of the reason of vibration.

Description

Bolt and nut fastener with anti-loosening and anti-falling functions

Technical Field

The utility model relates to a bolt technical field especially relates to a bolt and nut fastener with locking function that drops that moves.

Background

The existing nut is used for fastening a fixture, and because a gap space exists when the screw is screwed with the nut, the gap is gradually enlarged due to the long-term vibration influence of the fixture, so that the problem of gradual loosening is caused, and the fixture cannot be completely fixed.

Through retrieval, chinese patent grant publication number is CN 211449342U, discloses a bolt nut fastener with locking function that drops that moves, including the nut, the grooving has been seted up to the left side wall bottom of nut, and the grooving width is 2.5mm, the left side lower extreme downwardly extending 2.5mm of nut, the lower surface of grooving is 30 degrees contained angles with the lower surface of nut, and the inside wall of nut is provided with continuous screw thread. This novel design benefit, convenient and practical through seting up the grooving, with the nut spiro union back on the bolt, makes the grooving closed, produces tension, prevents that the nut is not hard up when vibrations, drops.

However, the anti-drop nut has the problems of complex processing technology, poor stability and high processing cost.

To solve the above problems, we propose a bolt-and-nut fastener having a function of preventing loosening and falling.

SUMMERY OF THE UTILITY MODEL

The utility model provides a bolt and nut fastener with locking function that drops that moves has solved and has had gapped space when current screw and nut spiral shell are close, receives the fixture vibrations influence of being of a specified duration of time, can make the clearance gradually appear and strengthen, causes the technical problem that the pine takes off gradually.

In order to solve the technical problem, the utility model provides a bolt and nut fastener with the function of preventing loosening and falling, which comprises a reverse threaded rod integrally arranged at one end of the bolt far from the nut, the outer side wall of the bolt is sleeved with a nut a in a threaded manner, a threaded rod of the bolt is provided with a positive thread a, the inner side wall of the nut a is provided with a positive thread b corresponding to the positive thread a, the outer side wall of the reverse threaded rod is sleeved with the nut b in a threaded manner, the outer side wall of the reverse threaded rod is provided with a reverse thread a, the inner side wall of the nut b is provided with a reverse thread b corresponding to the reverse thread a, the nut a is provided with inclined plane sawtooth a on one side close to the nut b, the nut b is provided with inclined plane sawtooth b matched with the inclined plane sawtooth a on one side close to the nut a, and the direction of the inclined teeth of the inclined plane sawtooth a is opposite to that of the inclined teeth of the inclined plane sawtooth b.

Preferably, the threaded shank of the bolt has a diameter greater than the diameter of the reverse threaded shank.

Compared with the prior art, the utility model provides a pair of bolt and nut fastener with locking function that drops that moves has following beneficial effect:

1. the utility model provides a bolt and nut fastener with anti-loosening and anti-falling functions, a reverse threaded rod is arranged at one end of a bolt far away from a nut, inclined plane sawtooth a is arranged at one side of the nut a sleeved on the outer side wall of the bolt close to the nut b by threads, and inclined plane sawtooth b corresponding to the inclined plane sawtooth a is arranged at one side of the nut b sleeved on the outer side wall of the reverse threaded rod close to the nut a by threads, and the inclined plane sawtooth a is matched with the inclined plane sawtooth b, so that the stability is good, the problem that the bolt and the nut are loosened and fall off due to vibration is solved, the bolt and the nut are prevented from loosening and falling off in work, accidents are caused, thereby cause bodily injury, reduce the enterprise and take off the input of carrying out the maintenance because of preventing bolt and nut etc. in work in the later stage to engineering project, in addition, can also cause unnecessary loss or the accident that equipment damaged arouse because of bolt and nut pine takes off in large-scale mechanical equipment operation process.

2. The utility model provides a bolt and nut fastener with locking function that drops that moves, this anti-drop nut simple structure, processing technology is simple, consequently, has fine practicality.

Drawings

FIG. 1 is a schematic structural view of a bolt-nut fastener with anti-loosening and anti-falling functions;

FIG. 2 is a schematic side view of a bolt-nut fastener with anti-loosening and anti-falling functions;

FIG. 3 is a schematic view of a connection structure of a bolt and a reverse threaded rod in a bolt-nut fastener with a function of preventing loosening and falling off;

FIG. 4 is a front view of FIG. 3;

FIG. 5 is a schematic view of a connection structure of a nut a and an inclined sawtooth a in a bolt-nut fastener with anti-loosening and anti-falling functions;

FIG. 6 is a schematic view of a connection structure of a nut a and an inclined sawtooth a in a bolt and nut fastener with anti-loosening and anti-falling functions;

FIG. 7 is a schematic view of a connecting structure of a nut b and inclined sawteeth b in a bolt-nut fastener with anti-loosening and anti-falling functions;

fig. 8 is a schematic view of a connecting structure of a nut b and an inclined plane sawtooth b in a bolt and nut fastener with a function of preventing loosening and falling.

Reference numbers in the figures: 1. a bolt; 2. a reverse threaded rod; 3. a nut a; 4. a nut b; 5. inclined plane sawtooth a; 6. the inclined plane sawtooth b.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the 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.

Example one

The bolt and nut fastener with the anti-loosening and anti-falling function is provided by the aid of fig. 1-8, a reverse threaded rod 2 is integrally arranged at one end, far away from a nut, of a bolt 1, a nut a3 is sleeved on the outer side wall of the bolt 1, a positive thread a is arranged on the threaded rod of the bolt 1, a positive thread b corresponding to the positive thread a is arranged on the inner side wall of the nut a3, a nut b4 is sleeved on the outer side wall of the reverse threaded rod 2 in a threaded manner, a negative thread a is arranged on the outer side wall of the reverse threaded rod 2, a negative thread b corresponding to the negative thread a is arranged on the inner side wall of a nut b4, an inclined plane sawtooth 5 is arranged on one side, close to a nut b4, of the nut a3, an inclined plane sawtooth 865b 6 matched with a sawtooth inclined plane 5 is arranged on one side, close to the nut a3, and the direction of the sawtooth inclined plane a5 is opposite to that of the inclined plane sawtooth 6.

The function of beveled serrations a5 and beveled serrations b6 is to transmit the tendency of loosening of nut a3 to nut b4 and the tendency of loosening of nut b4 to nut a 3.

The diameter of the threaded shank of the bolt 1 is greater than the diameter of the reverse threaded shank 2.

The anti-drop nut adopts the mutual matching of the positive and negative threaded rods and the positive and negative threaded nuts, when any one nut is in a loosening trend, the positive and negative nuts can be mutually restricted and mutually restricted, the loosening trend of one part is converted into the self-fastening trend, and in addition, the anti-drop nut is not high in requirement on the manufacturing process and is easier to manufacture.

The working principle is as follows:

the reverse threaded rod 2 and the nut b4 and the inclined plane sawtooth b6 arranged at the side of the nut b4 close to the nut a3 can prevent the nut a3 from loosening by matching the inclined plane sawtooth a5 on the nut a3 with the inclined plane sawtooth b6 on the nut b4, when the nut a3 has a loosening tendency, the inclined plane sawtooth a5 transmits the loosening tendency of the nut a3 to the nut b4 through the inclined plane sawtooth b6, and because the threads on the nut b4 and the reverse threaded rod 2 are both reverse threads, and the loosening direction of the nut a3 is consistent with the fastening direction of the nut b4, the loosening tendency of the nut a3 can make the nut b4 increasingly tightened, thereby compressing the nut a 3; when nut b4 has a loosening tendency, inclined sawteeth b6 transmit the loosening tendency of nut b4 to nut a3, and since the threads of nut a3 and bolt 1 are both positive threads and the loosening direction of nut b4 is consistent with the tightening direction of nut a3, the loosening tendency of nut b4 makes nut a3 tighter and tighter.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a bolt and nut fastener with locking function that drops that moves which characterized in that: comprises a reverse threaded rod (2) integrally arranged at one end of a bolt (1) far away from a nut, the outer side wall of the bolt (1) is sleeved with a nut a (3) in a threaded manner, a threaded rod of the bolt (1) is provided with a positive thread a, an orthodontic thread b corresponding to the orthodontic thread a is arranged on the inner side wall of the nut a (3), a nut b (4) is sleeved on the outer side wall of the reverse threaded rod (2) in a threaded manner, the outer side wall of the reverse threaded rod (2) is provided with a reverse thread a, the inner side wall of the nut b (4) is provided with a reverse thread b corresponding to the reverse thread a, one side of the nut a (3) close to the nut b (4) is provided with inclined plane sawteeth a (5), one side of the nut b (4) close to the nut a (3) is provided with inclined plane sawteeth b (6) matched with the inclined plane sawteeth a (5), the direction of the inclined teeth of the inclined plane sawtooth a (5) is opposite to that of the inclined plane sawtooth b (6).

2. A bolt-nut fastener with anti-loosening and anti-falling functions according to claim 1, characterized in that the diameter of the threaded shank of the bolt (1) is larger than the diameter of the reverse threaded shank (2).