Self-locking nut

Abstract

The self-locking nut comprises a nut body, a fastening ring and at least two clamping rings, the outer side of the nut body comprises a first connecting section used for being connected with the fastening ring in a matched mode and a second connecting section used for being connected with the clamping rings in a matched mode, and the first connecting section is connected to one end of the second connecting section; a limiting flange is arranged at the other end of the second connecting section; according to the self-locking nut, a plurality of clamping pieces are annularly arranged on the outer sides of the clamping rings, the clamping pieces extend in an inclined mode, when the nut is embedded and installed, the nut can be embedded into an installation component in the inclined direction of the clamping pieces, and under the action of the clamping pieces, the clamping pieces can be separated from the clamping rings, so that the self-locking nut is prevented from being damaged. The nut can be prevented from rotating in the installation component and can also be prevented from falling off from the installation component, the nut can achieve the self-locking effect in the installation component, and the installation tightness of the nut embedded in the installation component is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of fasteners, and particularly relates to a self-locking nut. Background Art

[0002] Common fasteners include bolts, studs, screws, nuts, washers, pins, etc. Among them, the nut is a polygonal column with a central threaded hole. The inner wall of the central threaded hole is provided with internal threads, which are screwed tightly with the external threads on the stud.

[0003] An existing anti-loosening fastening nut, with the publication number CN220551362U, includes: a fastening cover. A first through hole is opened at the top end of the fastening cover. A fastener is inserted into the interior of the first through hole. A plug board is fixedly connected to the bottom end of the fastener. Positioning plugs are respectively fixedly connected to the four corners of the bottom end of the fastening cover. The convex blocks at the bottom ends of the positioning plugs are clamped inside the positioning slots, and the positioning slots are opened on the side wall of the fixed nut. By inserting and fixing the fastening cover and the fixed nut together through the fastener, the movement space of the screw is restricted, thereby preventing the screw from loosening during vibration and preventing the fastening cover from falling due to vibration by inserting the positioning plug into the side wall of the fixed nut, further tightening the clamping connection method between the fastening cover and the fixed nut.

[0004] For the above nut structure, although it can solve the problem of the fastening cover falling due to vibration, for the nut in embedded installation, it is also required that the nut be clamped in the embedded component after embedded installation and not fall out of the embedded component; after the above nut structure is embedded and installed, there is no corresponding connection structure to prevent the nut from falling off between the nut and the embedded component. Therefore, the nut is likely to fall off due to external factors such as vibration. Content of the Utility Model

[0005] In order to overcome the deficiencies of the prior art, the utility model provides a self-locking nut.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] A self-locking nut, comprising a nut body, a fastening ring and at least two locking rings. The outer side of the nut body includes a first connecting section for mating connection with the fastening ring and a second connecting section for mating connection with the locking rings. The first connecting section is connected to one end of the second connecting section, and a limiting flange is provided at the other end of the second connecting section. The locking rings are sleeved on the second connecting section, and a spacer ring is provided between adjacent locking rings. The spacer ring is also sleeved on the second connecting section. The locking rings near both ends of the second connecting section are respectively abutted against the fastening ring and the limiting flange. A plurality of outwardly protruding locking pieces are provided on the outer side of the locking ring. The locking pieces are inclined and extended from the limiting flange to the side of the fastening ring from inside to outside, and the plurality of locking pieces are arranged at intervals in the circumferential direction of the locking ring. A threaded hole penetrating axially is provided inside the nut body.

[0008] In the present utility model, the spacer ring is inclined and extended from the limiting flange to the side of the fastening ring from inside to outside.

[0009] In the present utility model, the inclination angle of the spacer ring is equal to the inclination angle of the locking ring.

[0010] In the present utility model, the locking pieces protrude from the outer side edge of the spacer ring.

[0011] In the present utility model, the outer side walls of the locking pieces are all arc surfaces with the central axis of the nut body as the axis.

[0012] In the present utility model, the first connecting section includes a socket section and a clamping flange. A socket hole and a clamping hole are axially formed inside the fastening ring. The socket hole is in mating connection with the socket section, and the clamping hole is in fitting connection with the clamping flange.

[0013] In the present utility model, the outer diameter of the second connecting section > the outer diameter of the clamping flange > the outer diameter of the socket section.

[0014] In the present utility model, a tapered hole is provided at one end of the socket hole far from the clamping hole. The aperture of the tapered hole gradually increases from the end connecting the socket hole to the end connecting the end face of the fastening ring. The aperture of the small end of the tapered hole is equivalent to the aperture of the socket hole.

[0015] In the present utility model, the outer side of the fastening ring includes an abutting section and a hole-sealing section. One end of the abutting section is connected to one end of the hole-sealing section. The other end of the abutting section is abutted against the locking ring. The other end of the hole-sealing section is flush with the end face of the first connecting section far from the second connecting section. The outer diameter of the hole-sealing section is greater than the outer diameter of the abutting section.

[0016] The beneficial effects of the present utility model are as follows: The self-locking nut is provided with a plurality of locking pieces circumferentially on the outer side of the locking ring, and the locking pieces extend obliquely. When the nut is embedded and installed, it can be embedded into the installation part along the inclined direction of the locking pieces. Under the action of the locking pieces, the nut can be prevented from rotating in the installation part and falling off from the installation part. The nut can achieve the self-locking function in the installation part, and the tightness of the nut embedded and installed in the installation part is relatively high. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a perspective view of the self-locking nut of this embodiment;

[0018] Figure 2 is a front view of the self-locking nut of this embodiment;

[0019] Figure 3 is a schematic cross-sectional structure view of the self-locking nut of this embodiment;

[0020] Figure 4 is a perspective view of the nut body of this embodiment;

[0021] Figure 5 is a perspective view of the locking ring of this embodiment;

[0022] Figure 6 is a schematic cross-sectional structure view of the fastening ring of this embodiment. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.

[0024] It should be noted that if there are directional indications (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial...) involved in the embodiments of the present utility model, then the directional indications are only used to explain the relative positional relationship and movement conditions between components in a certain specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0025] In addition, if the embodiments of the present utility model involve descriptions such as "first" or "second", the descriptions of "first" or "second" are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments may be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0026] As Figures 1 to 6 shown, this embodiment discloses a self-locking nut, which includes a nut body 1, a fastening ring 2, and at least two locking rings 3. The outer side of the nut body 1 includes a first connection section 11 for mating connection with the fastening ring 2 and a second connection section 12 for mating connection with the locking ring 3. The first connection section 11 is connected to one end of the second connection section 12, and a limiting flange 13 is provided at the other end of the second connection section 12; the locking ring 3 is sleeved on the second connection section 12, and a separating ring 4 is provided between adjacent locking rings 3, and the separating ring 4 is also sleeved on the second connection section 12. The locking rings 3 near both ends of the second connection section 12 respectively abut against the fastening ring 2 and the limiting flange 13; a plurality of outwardly protruding locking pieces 31 are provided on the outer side of the locking ring 3, and the locking pieces 31 extend obliquely from the limiting flange 13 to the side of the fastening ring 2 from the inside to the outside, and the plurality of locking pieces 31 are arranged at intervals along the circumferential direction of the locking ring 3; a threaded hole 14 penetrating axially is provided inside the nut body 1. The self-locking nut of this embodiment circumferentially arranges a plurality of locking pieces 31 on the outer side of the locking ring 3, and the locking pieces 31 extend obliquely, so that when the nut is embedded and installed, it can be embedded into the installation part along the inclination direction of the locking pieces 31. Under the action of the locking pieces 31, it can not only prevent the nut from rotating in the installation part, but also prevent the nut from falling off the installation part. The nut can achieve the self-locking function in the installation part, and the tightness of the nut embedded in the installation part is relatively high.

[0027] As a preferred embodiment, the number of the locking rings 3 can be configured according to the length of the second connection section 12. When the length of the second connection section 12 is longer, the number of the locking rings 3 is more, and a separating ring 4 is arranged between adjacent locking rings 3 to separate adjacent two locking rings 3.

[0028] As a preferred embodiment, the separating ring 4 extends obliquely from the limiting flange 13 to one side of the fastening ring 2 from the inside to the outside, the inclination angle of the separating ring 4 is equal to the inclination angle of the locking ring 3, and the locking piece 31 protrudes from the outer side edge of the separating ring 4. Thereby, the contact between the locking ring 3 and the separating ring 4 is better, greatly improving the self-locking performance of the nut. And after the contact area between the locking ring 3 and the separating ring 4 increases, the structural strength of the locking piece 31 can be improved, avoiding problems such as fracture of the locking piece 31 during use.

[0029] As a preferred embodiment, the outer side walls of the locking pieces 31 are all arc surfaces centered on the central axis of the nut body 1.

[0030] As a preferred embodiment, the first connecting section 11 includes a sleeved section 111 and a clamping flange 112. An axially extending sleeved hole 21 and a clamping hole 22 are formed inside the fastening ring 2. The sleeved hole 21 is in fit connection with the sleeved section 111, and the clamping hole 22 is in fit connection with the clamping flange 112.

[0031] As a preferred embodiment, the outer diameter of the second connecting section 12 > the outer diameter of the clamping flange 112 > the outer diameter of the sleeved section 111, so that the locking ring 3 and the separating ring 4 can be sleeved through the first connecting section 11. Further, in order to facilitate the sleeved installation between the fastening ring 2 and the first connecting section 11, a tapered hole 23 is provided at one end of the sleeved hole 21 far from the clamping hole 22, and the aperture of the tapered hole 23 gradually increases from the end connecting the sleeved hole 21 to the end connecting the end face of the fastening ring 2; the aperture of the small end of the tapered hole 23 is equivalent to the aperture of the sleeved hole 21; the nut body 1 has a certain elasticity. When the fastening ring 2 is in fit with the first connecting section 11, the clamping flange 112 of the first connecting section 11 enters from one end of the tapered hole 23. Under the guiding action of the tapered hole 23, the clamping flange 112 deforms and contracts and gradually enters the sleeved hole 21. Until after passing through the sleeved hole 21, the clamping flange 112 elastically resets and cooperates with the clamping hole 22, the sleeved section 111 cooperates with the sleeved hole 21, and the fastening ring 2 and the first connecting section 11 are relatively fixedly connected.

[0032] As a preferred embodiment, the outer side of the fastening ring 2 includes an abutting section 24 and a hole-sealing section 25. One end of the abutting section 24 is connected to one end of the hole-sealing section 25, the other end of the abutting section 24 abuts against the locking ring 3, the other end of the hole-sealing section 25 is flush with the end face of the first connecting section 11 far from the second connecting section 12, and the outer diameter of the hole-sealing section 25 is greater than the outer diameter of the abutting section 24. When the nut is embedded and installed, the aperture of the embedding hole is equivalent to the outer diameter of the hole-sealing section 25. When the nut completely enters the embedding hole, the hole-sealing section 25 closes the entrance of the embedding hole, so that the connection between the nut and the installation component is tight, the stability is high, the overall structure is airtight, and the aesthetics after the nut is embedded and installed is also better.

[0033] The above are only the preferred embodiments of the present utility model, and all technical solutions that achieve the purpose of the present utility model by substantially the same means fall within the protection scope of the present utility model.

Claims

1. A self-locking nut, characterized in that: It includes a nut body (1), a fastening ring (2) and at least two locking rings (3). The outer side of the nut body (1) includes a first connection section (11) for mating connection with the fastening ring (2) and a second connection section (12) for mating connection with the locking ring (3). The first connection section (11) is connected to one end of the second connection section (12), and a limiting flange (13) is provided at the other end of the second connection section (12); the locking ring (3) is sleeved on the second connection section (12), and a spacer ring (4) is provided between adjacent locking rings (3), and the spacer ring (4) is also sleeved on the second connection section (12). The locking rings (3) near both ends of the second connection section (12) respectively abut against the fastening ring (2) and the limiting flange (13); a plurality of outwardly protruding locking pieces (31) are provided on the outer side of the locking ring (3), and the locking pieces (31) extend obliquely from the limiting flange (13) to the side of the fastening ring (2) from the inside to the outside, and the plurality of locking pieces (31) are arranged at intervals along the circumferential direction of the locking ring (3); a threaded hole (14) penetrating axially is provided inside the nut body (1).

2. The self-locking nut according to claim 1, characterized in that: The spacer ring (4) extends obliquely from the limiting flange (13) to the side of the fastening ring (2) from the inside to the outside.

3. The self-locking nut according to claim 2, wherein: The inclination angle of the spacer ring (4) is equal to the inclination angle of the locking ring (3).

4. A self-locking nut according to claim 1, characterized in that: The locking piece (31) protrudes beyond the outer side edge of the spacer ring (4).

5. A self-locking nut according to claim 1, characterized in that: The outer side walls of the locking pieces (31) are all arc surfaces centered on the central axis of the nut body (1).

6. The self-locking nut according to claim 1, characterized in that: The first connection section (11) includes a socket section (111) and a clamping flange (112). A socket hole (21) and a clamping hole (22) are axially formed inside the fastening ring (2). The socket hole (21) is in mating connection with the socket section (111), and the clamping hole (22) is in mating connection with the clamping flange (112).

7. The self-locking nut according to claim 6, characterized in that: The outer diameter of the second connection section (12) > the outer diameter of the clamping flange (112) > the outer diameter of the socket section (111).

8. The self-locking nut according to claim 6, characterized in that: A tapered hole (23) is provided at one end of the socket hole (21) away from the clamping hole (22), and the aperture of the tapered hole (23) gradually increases from the end connecting the socket hole (21) to the end connecting the end face of the fastening ring (2); the aperture of the small end of the tapered hole (23) is equivalent to the aperture of the socket hole (21).

9. The self-locking nut according to claim 6, characterized in that: The outer side of the fastening ring (2) includes an abutting section (24) and a hole-sealing section (25). One end of the abutting section (24) is connected to one end of the hole-sealing section (25). The other end of the abutting section (24) abuts against the locking ring (3). The other end of the hole-sealing section (25) is flush with the end face of the first connection section (11) away from the second connection section (12), and the outer diameter of the hole-sealing section (25) is greater than the outer diameter of the abutting section (24).

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