Self-locking nut

Abstract

The utility model belongs to the technical field of nuts, and particularly relates to a self-locking nut which comprises a main nut body, a locking frustum is formed at one end of the main nut body, and a plurality of clamping grooves extending in the axial direction are formed in the locking frustum. A retaining groove which is matched with the retaining frustum and extrudes the retaining frustum is formed in the end face of the compression nut; and the pre-tightening spring is arranged between the main nut and the compression nut.

Description

Technical Field

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

[0002] Usually, the fasteners used for threaded connection of mechanical equipment are bolt assemblies composed of bolts, nuts, spring washers, etc. In general, the bolts rely on the nuts themselves to prevent loosening. Among them, there are mainly the following types of anti-loosening nuts: anti-loosening nuts with built-in nylon anti-slowing rings, anti-loosening nuts with built-in anti-slowing steel sheets, anti-loosening nuts with built-in anti-slowing pins (balls), anti-loosening nuts with changed thread tooth angles, anti-loosening nuts with anti-slowing grooves on the radial surface, and anti-loosening nuts with threads punched and deformed to increase the friction torque between the nut and the bolt. The above anti-loosening methods have their own advantages and disadvantages, but it is difficult to meet the anti-loosening requirements under working conditions such as high vibration frequency, high vibration intensity, and long vibration period. Utility Model Content

[0003] The purpose of the utility model is to provide a nut which is simple in structure, easy to install and self-locking and anti-loosening in view of the above-mentioned technical problems.

[0004] In view of this, the utility model provides a self-locking nut, comprising:

[0005] A main nut, one end of which is formed with a stop cone, and the stop cone is formed with a plurality of axially extending clamping grooves;

[0006] A compression nut, on the end surface of which is formed a stop groove which cooperates with and squeezes the stop cone;

[0007] A preload spring is provided between the main nut and the clamping nut.

[0008] In the above technical solution, further, the number of main nuts is two, and the backstop cones on the two main nuts are symmetrically arranged with each other; backstop grooves are formed on both side end faces of the clamping nut; and pre-tightening springs are respectively arranged on both sides of the clamping nut to resist the main nuts on both sides.

[0009] In the above technical solution, further,

[0010] The main nut also includes:

[0011] A positioning groove, which is arranged on the end surface of the main nut with a stop cone;

[0012] One end of the preload spring extends into the positioning groove.

[0013] In the above technical solution, further,

[0014] The gland nut also includes:

[0015] A limiting groove, which is arranged at the outer edge of the stop groove of the compression nut;

[0016] The other end of the preload spring extends into the limiting groove.

[0017] In the above technical solution, further,

[0018] The main nut also includes:

[0019] A clamping assembly is arranged at the bottom of the positioning groove.

[0020] In the above technical solution, further,

[0021] The clamping assembly includes:

[0022] A plurality of clamping grooves are evenly distributed at the bottom of the limiting groove according to the circumference, and one end of the clamping groove is connected to the limiting groove, and the other end extends to the threaded hole of the main nut and is connected thereto;

[0023] A clamping block, the clamping block is arranged in the clamping groove, and a clamping portion is formed on one end of the clamping block facing the threaded hole of the main nut;

[0024] One end of the preload spring squeezes the clamping block so that the initial clamping block moves toward the threaded hole direction of the main nut.

[0025] In the above technical solution, further,

[0026] The clamping assembly also includes:

[0027] An extrusion ring is arranged in the positioning groove, and the inner side of one end of the extrusion ring contacts the pressing block and forms an inclined extrusion portion;

[0028] The outer side of one end of the clamping block in contact with the extrusion ring is formed with an inclined surface receiving portion cooperating with the inclined surface extrusion portion; one end of the preload spring first contacts with the extrusion ring and then presses against the clamping block through the extrusion ring.

[0029] In the above technical solution, further,

[0030] The clamping assembly also includes:

[0031] The inner receiving ring is arranged at the bottom of the positioning groove and elastically supports the extrusion ring.

[0032] The beneficial effects of the utility model are:

[0033] 1. The cooperation of two main nuts and one compression nut achieves a triple anti-loosening and self-locking effect;

[0034] 2. The setting of the clamping assembly can further improve the self-locking and anti-loosening effect of the main nut itself. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a structural schematic diagram of the utility model;

[0036] Figure 2 It is a cross-sectional schematic diagram of the utility model;

[0037] The markings in the figure are: 1-main nut, 2-retraction cone, 3-clamping groove, 4-preload spring, 5-positioning groove, 6-limiting groove, 7-pressing groove, 8-pressing block, 9-pressing part, 10-inclined extrusion part, 11-inner receiving ring, 12-pressing nut, 13-extrusion ring. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0039] Embodiment 1:

[0040] This embodiment provides a self-locking nut, comprising:

[0041] A main nut 1, one end of which is formed with a stop cone 2, and the stop cone 2 is formed with a plurality of axially extending clamping grooves 3;

[0042] A clamping nut 12, on the end surface of which is formed a stop groove that cooperates with and squeezes the stop cone 2;

[0043] A preload spring 4 is provided between the main nut 1 and the clamping nut 12 .

[0044] In the present technical scheme, the main nut 1 and the clamping bolt are both provided with coaxially arranged threaded holes. The main nut 1 is used to cooperate with threaded shaft parts and press against the parts to be tightened, so as to tighten the mechanical parts; and the clamping nut 12 is screwed into the shaft parts, and the retaining cone 2 is squeezed through the retaining groove, so that the retaining cone 2 is deformed in the direction of pressing against the shaft parts, so that the clamping nut 12 has a good retaining and anti-loosening effect; and due to the setting of the clamping groove 3, the retaining boss is not easy to break when deformation occurs; the set pre-tightening spring 4 is pressed between the main nut 1 and the clamping nut 12, so as to better prevent the main nut 1 and the clamping nut 12 from loosening.

[0045] Embodiment 3:

[0046] This embodiment provides a self-locking nut, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0047] There are two main nuts 1, and the anti-retraction cones 2 on the two main nuts 1 are symmetrically arranged; anti-retraction grooves are formed on the end faces of both sides of the clamping nut 12; and pre-tightening springs 4 are respectively arranged on both sides of the clamping nut 12 to resist the main nuts 1 on both sides.

[0048] In the present technical solution, the cooperation of two main nuts 1 and a clamping nut 12 achieves a triple anti-loosening and self-locking effect, thereby further improving the overall anti-loosening effect of the self-locking nut and further improving the structural stability of the mechanical parts.

[0049] Embodiment 3:

[0050] This embodiment provides a self-locking nut, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0051] The main nut 1 also includes:

[0052] A positioning groove 5, which is arranged on the end surface of the main nut 1 with the stop cone 2;

[0053] One end of the preload spring 4 extends into the positioning groove 5 .

[0054] In the present technical solution, the provision of the positioning groove 5 can prevent one end of the preload spring 4 from being offset, thereby ensuring the stability of the position of the preload spring 4 .

[0055] Embodiment 4:

[0056] This embodiment provides a self-locking nut, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0057] The compression nut 12 also includes:

[0058] A limiting groove 6, which is arranged at the outer edge of the stop groove of the compression nut 12;

[0059] The other end of the preload spring 4 extends into the limiting groove 6 .

[0060] In the present technical solution, the setting of the limiting groove 6 can prevent the other end of the preload spring 4 from being offset, thereby further ensuring the stability of the position of the preload spring 4 .

[0061] Embodiment 5:

[0062] This embodiment provides a self-locking nut, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0063] The main nut 1 also includes:

[0064] A clamping assembly is arranged at the bottom of the positioning groove 5 .

[0065] In the present technical solution, the provision of the clamping assembly can improve the anti-loosening and self-locking effect of the main nut 1 itself, thereby further ensuring the anti-loosening effect of the self-locking nut as a whole.

[0066] Embodiment 6:

[0067] This embodiment provides a self-locking nut, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0068] The clamping assembly includes:

[0069] A plurality of clamping grooves 7 are evenly distributed at the bottom of the limiting groove 6 according to the circumference, and one end of the clamping groove 7 is connected to the limiting groove 6, and the other end extends to the threaded hole of the main nut 1 and is connected thereto;

[0070] A clamping block 8, which is disposed in the clamping groove 7, and a clamping portion 9 is formed on one end of the clamping block 8 facing the threaded hole of the main nut 1;

[0071] One end of the preload spring 4 squeezes the clamping block 8 so that the initial clamping block 8 moves toward the threaded hole of the main nut 1 .

[0072] In the present technical solution, the clamping groove 7 is used to accommodate the clamping block 8, and the clamping block 8 is displaced toward the threaded hole of the main nut 1 under the action of the preload spring 4, so that the clamping part 9 is pressed against the threaded shaft part to achieve a good self-locking effect.

[0073] Embodiment 7:

[0074] This embodiment provides a self-locking nut, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0075] The clamping assembly also includes:

[0076] An extrusion ring 13, the extrusion ring 13 is arranged in the positioning groove 5, and the inner side of one end of the extrusion ring 13 contacts the pressing block 8 and forms an inclined extrusion portion 10;

[0077] The outer side of the end of the clamping block 8 that contacts the extrusion ring 13 is formed with an inclined receiving portion that cooperates with the inclined extrusion portion 10; one end of the preload spring 4 first contacts the extrusion ring 13 and then presses against the clamping block 8 through the extrusion ring 13.

[0078] In the present technical solution, the pressing block 8 on the same pressing assembly can be squeezed simultaneously through an extrusion ring 13, and the self-locking effect of the main nut 1 itself can be better achieved through the cooperation between the inclined extrusion part 10 and the inclined force-bearing part.

[0079] Embodiment 8:

[0080] This embodiment provides a self-locking nut, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0081] The clamping assembly also includes:

[0082] The inner receiving ring 11 is arranged at the bottom of the positioning groove 5 and elastically supports the extrusion ring 13 .

[0083] In the present technical solution, the arrangement of the inner receiving ring 11 can provide good elastic support for the extrusion ring 13 , thereby ensuring that the extrusion ring 13 can better press against the pressing block 8 .

[0084] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A self-locking nut, characterized in that: A main nut (1), wherein a stop cone (2) is formed at one end of the main nut (1), and a plurality of axially extending clamping grooves (3) are formed on the stop cone (2); A clamping nut (12), wherein the end surface of the clamping nut (12) is formed with a stop groove that cooperates with the stop cone (2) and squeezes the stop cone (2); A preload spring (4) is provided between the main nut (1) and the clamping nut (12).

2. A self-locking nut according to claim 1, characterized in that: There are two main nuts (1), and the anti-retraction cones (2) on the two main nuts (1) are symmetrically arranged; anti-retraction grooves are formed on the end faces of both sides of the clamping nut (12); and pre-tightening springs (4) are respectively arranged on both sides of the clamping nut (12) to resist the main nuts (1) on both sides.

3. A self-locking nut according to claim 1 or 2, characterized in that: The main nut (1) further comprises: A positioning groove (5), wherein the positioning groove (5) is arranged on the end surface of the main nut (1) with the stop cone (2); One end of the preload spring (4) extends into the positioning groove (5).

4. A self-locking nut according to claim 3, characterized in that: The compression nut (12) further comprises: A limiting groove (6), wherein the limiting groove (6) is arranged at the outer edge of the stop groove of the clamping nut (12); The other end of the preload spring (4) extends into the limiting groove (6).

5. A self-locking nut according to claim 4, characterized in that: The main nut (1) further comprises: A clamping assembly is arranged at the bottom of the positioning groove (5).

6. A self-locking nut according to claim 5, characterized in that: The pressing assembly comprises: A clamping groove (7), wherein a plurality of the clamping grooves (7) are evenly distributed at the bottom of the limiting groove (6) along a circumference, and one end of the clamping groove (7) is connected to the limiting groove (6), and the other end extends toward the threaded hole of the main nut (1) and is connected thereto; A clamping block (8), wherein the clamping block (8) is arranged in the clamping groove (7), and a clamping portion (9) is formed on one end of the clamping block (8) facing the threaded hole of the main nut (1); One end of the preload spring (4) squeezes the clamping block (8) so that the initial clamping block (8) moves toward the threaded hole of the main nut (1).

7. A self-locking nut according to claim 6, characterized in that: The clamping assembly further comprises: An extrusion ring (13), wherein the extrusion ring (13) is arranged in the positioning groove (5), and the inner side of one end of the extrusion ring (13) contacts the pressing block (8) and forms an inclined extrusion portion (10); The outer side of one end of the pressing block (8) in contact with the extrusion ring (13) is formed with an inclined surface receiving portion that cooperates with the inclined surface extrusion portion (10).

8. A self-locking nut according to claim 7, characterized in that: The clamping assembly further comprises: An inner receiving ring (11) is arranged at the bottom of the positioning groove (5) and provides elastic support for the extrusion ring (13).

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