CN113153886B

CN113153886B - Anti-loosening nut group

Info

Publication number: CN113153886B
Application number: CN202010073946.6A
Authority: CN
Inventors: 林家民; 林家薇
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-01-22
Filing date: 2020-01-22
Publication date: 2022-09-16
Anticipated expiration: 2040-01-22
Also published as: CN113153886A

Abstract

A lock nut assembly comprising: a first nut having a nut base and a screwing part protruding outward from one surface of the nut base, the screwing part being provided with a plurality of longitudinal grooves at intervals so that the screwing part is formed with a plurality of screwing claw bodies, inner walls of the screwing claw bodies being provided with first internal thread walls for screwing with bolts; and the packing ring piece is arranged outside the screwing part of the first screw cap, and the inner wall of the packing ring piece is provided with a packing inner wall for packing the outer wall of each screwing claw body of the screwing part. The check nut group has good shock resistance and locking property.

Description

Anti-loosening nut group

Technical Field

The present invention relates to a nut, and more particularly, to a lock nut assembly.

Background

The nut and the bolt are screwed together to lock the object. That is, after the bolt is inserted through the object or more than one object, the nut is screwed on the end of the bolt to lock the objects.

However, due to vibration and other factors, the nut and the bolt may loosen, and the object to be locked may loosen or loosen.

Accordingly, there is a need for a lock nut that prevents loosening between the nut and the bolt.

Referring to fig. 1 and 2, an exploded view and an assembled cross-sectional view of a conventional anti-loosening nut assembly are shown. As shown in these figures, the conventional lock nut assembly includes an eccentric nut 400 and a lock nut 500. The eccentric nut 400 has an eccentric screw hole 410, that is, the wall of the outer periphery of the eccentric screw hole 410 has a thin wall 411 and a thick wall 412 opposite to each other; the eccentric screw hole 410 is for screwing the bolt 300. The locking nut 500 is assembled outside the wall of the eccentric screw hole 410 of the eccentric nut 400, and is locked with the bolt 300 by the locking screw hole 510, and the inner wall 520 of the locking nut 500 is tightly pressed against the thick wall 412 of the eccentric nut 400 to prevent the eccentric nut 400 from loosening.

However, the conventional eccentric lock nut set has the following disadvantages: firstly, the tight point is on one side, there is a fear of tooth collapse and poor shock resistance; secondly, the tightening point occurs between the lock nut 500 and the eccentric nut 400, and the tightening force cannot be transmitted between the eccentric nut 400 and the bolt 300, so that the locking force on the bolt 300 cannot be increased accordingly, and the locking performance is poor.

Disclosure of Invention

The invention provides a lock nut group with good shock resistance and locking property.

According to an aspect of the present invention, there is provided a locknut, including: the first nut is provided with a nut base and a screwing part which extends outwards from one surface of the nut base, a plurality of longitudinal grooves are arranged at intervals on the screwing part, so that a plurality of screwing claw bodies are formed on the screwing part, and the inner wall of each screwing claw body is provided with a first internal thread wall for screwing the bolt; and the packing ring piece is arranged outside the screwing part of the first screw cap in a group, and the inner wall of the packing ring piece is provided with a packing inner wall for packing the outer wall of each screwing claw body of the screwing part.

According to an embodiment of the present invention, the outer wall of the screwing portion of the first nut is a tapered outer wall, and the inner pressing wall of the pressing ring is a tapered inner pressing wall corresponding to the tapered outer wall.

According to an embodiment of the present invention, the outer wall of each of the screw claws of the screw portion of the first nut is symmetrically deformed to protrude outward.

According to an embodiment of the present invention, the tightening ring is a second nut, the inner wall of the second nut has the above-mentioned tightening inner wall, and a second inner threaded wall for screwing the bolt.

According to an embodiment of the invention, the packing ring member is a washer, and the inner wall of the washer is provided with the packing inner wall.

According to the anti-loosening nut set, the anti-loosening nut set has good shock resistance and locking property according to the design that the plurality of screw-in claw bodies of the screw-in part of the first nut and the outer wall of the screw-in part of the first nut are symmetrically and outwards protruded and deformed.

Drawings

Fig. 1 is an exploded view illustrating a conventional eccentric anti-loosening nut assembly.

Fig. 2 is a combined sectional view illustrating the eccentric anti-loosening nut assembly shown in fig. 1.

Fig. 3 is an exploded view illustrating the anti-loosening nut set according to the first embodiment of the present invention.

Fig. 4 is an assembled external view showing the anti-loosening nut set shown in fig. 3.

Fig. 5 is an assembled cross-sectional view illustrating the anti-loosening nut set shown in fig. 3.

Fig. 6 is an assembled longitudinal sectional view showing the anti-loosening nut set shown in fig. 3.

FIG. 7 is an enlarged view of portion A of the lock nut assembly shown in FIG. 6.

Fig. 8 is an assembled longitudinal sectional view showing an anti-loosening nut set according to a second embodiment of the present invention.

Detailed Description

The foregoing and other technical matters, features and effects of the present invention will be apparent from the following detailed description of embodiments thereof, which is to be read in connection with the accompanying drawings.

Referring to fig. 3 to 7, a lock nut assembly according to a first embodiment of the present invention includes a first nut 100 and a packing ring 200. In the first embodiment, the packing ring 200 is a second nut 200 a.

The first nut 100 has a nut base 110 and a threaded portion 120 projecting outwardly from one face of the nut base. The outer wall of the screwing part 120 is a conical outer wall; a plurality of (three in the embodiment of the figure) longitudinal grooves 121 are arranged at intervals on the screwing part 120, so that a plurality of (four in the embodiment of the figure) screwing claw bodies 122 are formed at the part between every two adjacent longitudinal grooves 121 of the screwing part 120; further, the outer wall of each of the screw claw bodies 122 is symmetrically deformed to protrude outward 122a, and the dimension of the deformation is a (e.g., 1 mm). The inner wall of each of the screw claw bodies 122 is provided with a first internal thread wall 123 for screwing the bolt 300.

The packing ring 200 (second nut 200a) is disposed outside the screwing portion 120 of the first nut 100. The inner wall of the second nut 200a has a tightening inner wall 210 and a second inner threaded wall 220. The inner clamping wall 210 is formed as a tapered inner clamping wall corresponding to the tapered outer wall of the first nut 100, and is used for clamping the outer wall of each screw claw 122 of the screw portion 120 of the first nut 100. The second internally threaded wall 220 is for screwing the bolt 300.

When in use, after the bolt 300 passes through the locking hole 610 of at least one object 600, the first nut 100 is screwed on the end of the bolt 300 according to the first internal thread wall 123, the second nut 200a is screwed on the end of the bolt 300 according to the second internal thread wall 220, and the screwing claws 122 of the first nut 100 are pressed inwards according to the pressing inner wall 210 of the second nut 200 a. Thereby locking the article 600.

Because the outer wall of each screw claw 122 of the first nut 100 forms the outward protruding deformation 122a with symmetry, when the second nut 200a is screwed and assembled with the bolt 300 outside the screw portion 120 of the first nut 100, a plurality of tightening points are naturally formed between the part of each screw claw 122 of the screw portion 120, which protrudes outward deformation 122a, and the tightening inner wall 210 of the second nut 200a, and the tightening points are evenly distributed on the periphery of the screw portion 120, and the stress is even, so that the anti-vibration performance of the anti-loose nut assembly is good, and the anti-loose effect is good; furthermore, the pressing force of the second nut 200a to each of the screw claws 122 of the screw portion 120 of the first nut 100 is transmitted to between the first internal thread wall 123 of the first nut 100 and the bolt 300, so that the locking force of the first nut 100 to the bolt 300 is increased, and the locking performance is excellent.

Fig. 8 is a longitudinal sectional view of the anti-loosening nut set according to the second embodiment of the present invention. The structure of the first nut 100 is identical to that of the first embodiment; the packing ring 200 is a washer 200b, and the inner wall of the washer has a packing inner wall 210.

When in use, after the bolt 300 passes through the locking hole 610 of at least one object 600, the screwing part 120 of the first nut 100 passes through the tightening inner wall 210 of the washer 200b, and then is screwed on the end of the bolt 300 according to the first internal thread wall 123 of the first nut 100, at this time, the nut base 110 of the first bolt 100 presses the washer 200b on the surface of the object 600, and simultaneously, with the continuous screwing of the first nut 100, each screwing claw body 122 of the first nut 100 is inwards tightened by the tightening inner wall 210 of the washer 200 b. Thereby locking the article 600.

Because the outer wall of each of the claw bodies 122 of the first nut 100 forms the symmetric outward protruding deformation 122a (see fig. 3), when the first nut 100 is screwed, a plurality of tightening points are naturally formed between the portion of each of the claw bodies 122 of the screwing portion 120 of the first nut 100, which protrudes outward 122a, and the inner tightening wall 210 of the washer 200b, and the tightening points are evenly distributed on the periphery of the screwing portion 120, and the stress is even, so that the anti-vibration performance of the anti-vibration nut set is good, and the anti-vibration effect is good; furthermore, the pressing force of the washer 200b on each of the claw bodies 122 of the screwing portion 120 of the first nut 100 is transmitted between the first internal thread wall 123 of the first nut 100 and the bolt 300, so that the locking force of the first nut 100 on the bolt 300 is increased, and the locking performance is good.

While the foregoing is directed to embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.

[ notation ] to show

100: first nut

110: nut base

120: screw-on part

121: longitudinal groove

122: screw-jointed claw body

122 a: outwardly projected deformation

123: first inner screw thread wall

200: packing ring piece

200 a: second nut

200 b: washer

210: packing inner wall

220: second inner screw thread wall

300: bolt

a: size of projected deformation

400: eccentric nut

410: eccentric screw hole

411: thin wall

412: thick wall

500: locking nut

510: locking screw hole

520: inner wall

600: article

610: and (6) locking holes.

Claims

1. A lock nut set for screwing a bolt, comprising:

a first nut having a nut base and a screw portion projecting outward from one surface of the nut base, the screw portion being provided with a plurality of longitudinal grooves at intervals so that a plurality of screw claws are formed at the screw portion, inner walls of the respective screw claws being provided with first internal thread walls for screwing the bolt, outer walls of the respective screw claws of the screw portion of the first nut being deformed so as to project outward locally symmetrically with respect to a reference circle; and

the packing ring piece is arranged outside the screwing part of the first screw cap, the inner wall of the packing ring piece is provided with a packing inner wall, and the packing inner wall is used for packing the outer wall of each screwing claw body of the screwing part.

2. The locknut assembly of claim 1 wherein the outer wall of the threaded portion of the first nut is a tapered outer wall and the inner urging wall of the urging ring is a tapered inner urging wall that is complementary to the tapered outer wall.

3. The lock nut assembly as claimed in claim 1 or 2, wherein the packing ring is a second nut having an inner wall with the packing inner wall, and a second inner threaded wall for screwing the bolt.

4. The locknut assembly according to claim 1 or 2, wherein the packing ring is a washer, and an inner wall of the washer has the packing inner wall.