CN218468035U

CN218468035U - Anti-loosening threaded fastener

Info

Publication number: CN218468035U
Application number: CN202222660264.2U
Authority: CN
Inventors: 李苏琼; 刘溪
Original assignee: Suzhou Yongshuo Intelligent Technology Co ltd
Current assignee: Suzhou Yongshuo Intelligent Technology Co ltd
Priority date: 2022-10-10
Filing date: 2022-10-10
Publication date: 2023-02-10
Anticipated expiration: 2032-10-10

Abstract

The utility model relates to a check thread fastener, which is provided with a bolt and a nut in threaded fit with the bolt, wherein the center of the end surface of the nut is provided with a first threaded hole; a second threaded hole is formed in the center of the end face of the anti-loosening ring; the hole wall of the second threaded hole is provided with a plurality of groups of openings in a circular array by taking the center of the end surface as the circle center, the right side part of each opening is sunken towards the center of the second threaded hole to form a sunken part, and the end surface of the second threaded hole with the sunken part is in a ratchet shape. The anti-loosening threaded fastener is good in anti-loosening capacity and simple to process, can generate ideal loosening resisting torque, effectively solves the problem that a special nut needs to be imported from abroad and faces a longer shelf life, can be processed into different sizes according to specific use environments, can be applied to the fields of industry, traffic and the like, is wide in application range and low in use cost, and effectively meets market requirements.

Description

Anti-loosening threaded fastener

Technical Field

The utility model relates to a threaded fastener especially relates to a locking threaded fastener.

Background

Threaded fasteners are in great demand in modern industry; the existing threaded fastener mainly comprises a bolt and a nut which are in threaded fit with each other; the most common failure mode of the threaded fastener is loosening failure, and in the fields of industry, transportation and the like, because the threaded fastener installed on industrial equipment and transportation is easy to loosen or even separate due to factors such as movement or vibration and the like, potential safety hazards are caused, and therefore, the improvement of the loosening prevention capability of the threaded fastener is very important.

At present, some common methods for preventing the loosening of the threaded fastener are to prevent the nut from loosening by coating glue or curing agent after the nut is fastened. The operation mode is simple to operate and low in cost, but the nut has a common fixing effect and can only be suitable for small-size threaded fasteners; in addition, an imported special nut is adopted, but the price is high and the use cost is high because the products are monopolized abroad, and the imported special nut has short shelf life and is difficult to meet the actual requirements of the Chinese market.

Disclosure of Invention

The utility model aims to solve the technical problem that a can produce not hard up resistance moment of torsion and processing is simple, can effectively satisfy the locking threaded fastener of market demand is provided.

In order to solve the technical problem, the utility model discloses a realize through following technical scheme: a locking threaded fastener is provided with a bolt and a nut in threaded fit with the bolt, wherein the center of the end face of the nut is provided with a first threaded hole in threaded fit with external threads on the bolt, the bolt is provided with an anti-loosening ring in threaded fit with the bolt, the anti-loosening ring is positioned above the top of the nut, and the bottom of the anti-loosening ring is mutually attached to the top of the nut; the end face of the anti-loosening ring is of a regular hexagon structure, and a second threaded hole matched with the external thread on the bolt is formed in the center of the anti-loosening ring.

Furthermore, the hole wall of the second threaded hole in the center of the anti-loosening ring is circularly arrayed with the center of the end face as the circle center, a plurality of groups of openings are formed, the right side of each opening is sunken towards the center of the second threaded hole to form a sunken part, and the end face of the second threaded hole with the sunken part is in a ratchet shape.

Further, the number of the gaps is 6.

Further, the height h of the anti-loosening ring is 3.5mm, the radius R of the second threaded hole is 6.6mm, and the width distance a between the two corresponding side faces of the anti-loosening ring is 18mm.

Further, the width b of the gap is 0.5mm.

Further, the depth of the recess portion is 0.8mm

Further, the height H of the nut is 10mm, and the thread pitch p of the central first threaded hole is 1.75mm.

Compared with the prior art, the utility model discloses an useful part is: the anti-loosening threaded fastener is good in anti-loosening capacity and simple to process, can generate ideal loosening resisting torque, effectively solves the problem that a special nut needs to be imported from abroad and faces a long shelf life, can be processed into different sizes according to specific use environments, can be applied to the fields of industry, traffic and the like, is wide in application range and low in use cost, and effectively meets market demands.

Drawings

The present invention will be further explained with reference to the accompanying drawings.

Fig. 1 is a schematic side view of a locking thread fastener of the present invention;

FIG. 2 is a schematic view of the end face structure of the retainer ring of the retainer screw fastener of the present invention;

fig. 3 is a graph of the loosening resistance torque of the present utility looseness resistant fastener and a conventional fastener.

In the figure: 1. a first threaded hole; 2. a nut; 3. an anti-loosening ring; 31. a second threaded hole; 32. opening the gap; 33. a recessed portion.

Detailed Description

The present invention is described in detail below with reference to the accompanying drawings and the following detailed description:

the anti-loose threaded fastener shown in fig. 1 is provided with a bolt and a nut 2 in threaded fit with the bolt, wherein the bolt is an M12 bolt, the nut 2 has the same characteristics as a standard M12 nut, the height H of the nut is 10mm, the center of the end surface of the nut 2 is provided with a first threaded hole 1 in threaded fit with an external thread on the bolt, and the pitch p of the first threaded hole 1 is 1.75mm; in order to prevent the looseness of the nut 2 on the bolt, the bolt is provided with a locking ring 3 in threaded fit with the bolt, the locking ring 3 is positioned above the top of the nut 2, and the bottom of the locking ring is attached to the top of the nut 2.

As shown in fig. 2, the end face of the anti-loosening ring 3 is in a regular hexagon structure, so that fastening or loosening operation is facilitated, the width distance a between two corresponding side faces of the anti-loosening ring 3 is 18mm, the height h of the anti-loosening ring 3 is 3.5mm, a second threaded hole 31 in threaded fit with the external thread on the bolt is formed in the center of the anti-loosening ring, and the radius R of the second threaded hole 31 is 6.6mm, so that the anti-loosening ring is convenient to fit with the bolt; in order to enable the anti-loosening ring 3 to be capable of radially extruding a bolt and generating a prefabrication torque after the anti-loosening ring 3 is matched with the bolt, a plurality of groups of notches 32 are circularly arrayed on the hole wall of a second threaded hole 31 in the center of the anti-loosening ring 3 by taking the center of the end face of the second threaded hole as a circle center, the width b of each notch 32 is 0.5mm, the number of the notches is 6, the right side part of each notch 32 is sunken towards the center of the second threaded hole 31 to form a sunken part 33, the sunken depth of each sunken part 33 is 0.8mm, and the end face of the second threaded hole 31 with the sunken parts 33 is in a ratchet shape and can clamp the bolt; when the anti-loosening device is used, when the nut 2 and the anti-loosening ring 3 are all screwed into bolts and do not clamp any object, the nut 2 and the bolts can form interference fit, and the anti-loosening ring 3 radially extrudes the bolts to generate prefabricated torque of about 6-10 Nm; when the nut 2 and the locking ring 3 are screwed out of the bolt, the ratchet-shaped locking ring 3 can clamp the bolt, theoretically, at least 6-10 Nm of loosening resisting torque which is the same as the prefabricated torque can be generated, and the actually measured loosening resisting torque is about 15-25 Nm.

As shown in fig. 3, after the form of fit between the bolt and the nut 2 is adjusted, a greater torque is required to remove the anti-loosening ring 3 than that of a common fastener, and the greater part is called a loosening resistance torque TuR, and for a threaded anti-loosening fastener of the specification M12, when the loosening resistance torque is greater than 8.5Nm, the threaded anti-loosening fastener has good anti-loosening performance.

The anti-loosening threaded fastener is good in anti-loosening capacity and simple to process, can generate ideal loosening resisting torque, effectively solves the problem that a special nut needs to be imported from abroad and faces a long shelf life, can be processed into different sizes according to specific use environments, can be applied to the fields of industry, traffic and the like, is wide in application range and low in use cost, and effectively meets market demands.

It is to be emphasized that: the above is only a preferred embodiment of the present invention, and the present invention is not limited to any form, and any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention are all within the scope of the technical solution of the present invention.

Claims

1. The utility model provides a locking threaded fastener, has the bolt and with bolt screw-thread fit's nut (2), the terminal surface center of nut (2) be provided with be used for with the bolt on the first screw hole (1) of external screw thread screw-thread fit, its characterized in that: the bolt is provided with a locking ring (3) in threaded fit with the bolt, the locking ring (3) is positioned above the top of the nut (2), and the bottom of the locking ring is attached to the top of the nut (2); the end surface of the anti-loosening ring (3) is of a regular hexagon structure, and a second threaded hole (31) which is matched with the external thread on the bolt in a threaded mode is formed in the center of the anti-loosening ring.

2. A check threaded fastener as claimed in claim 1, wherein: the hole wall of the second threaded hole (31) in the center of the anti-loosening ring (3) is circularly arrayed with a plurality of groups of openings (32) by taking the center of the end face as the center of a circle, the right side of each opening (32) is sunken towards the center of the second threaded hole (31) to form a sunken part (33), and the end face of the second threaded hole (31) with the sunken part (33) is in a ratchet shape.

3. A check threaded fastener as claimed in claim 2, wherein: the number of the gaps (32) is 6.

4. A check threaded fastener as claimed in claim 2 wherein: the height h of the anti-loosening ring (3) is 3.5mm, the radius R of the second threaded hole (31) is 6.6mm, and the width distance a between the two corresponding side faces of the anti-loosening ring (3) is 18mm.

5. A check threaded fastener as claimed in claim 2 wherein: the width b of the gap (32) is 0.5mm.

6. A check threaded fastener as claimed in claim 2, wherein: the depth of the recess (33) is 0.8mm.

7. A check threaded fastener as claimed in claim 1, wherein: the height H of the nut (2) is 10mm, and the thread pitch p of the first threaded hole (1) in the center of the nut is 1.75mm.