Anti-loosening nut assembly

Abstract

Disclosed in the present invention is an anti-loosening nut assembly, comprising a nut body, wherein the nut body is further fitted with an anti-loosening nut; the nut body is internally provided with an anti-loosening accommodating cavity, and the anti-loosening nut is wholly or partially accommodated in the anti-loosening accommodating cavity; a frustum portion is provided on the anti-loosening nut, and an outer side wall of the frustum portion is configured to correspondingly fit with an inner cavity wall of the anti-loosening accommodating cavity; and the anti-loosening nut is provided with at least one expansion joint, which is a joint that extends vertically through the anti-loosening nut. The present invention uses a double-nut structure, particularly in combination with the design of the anti-loosening nut, and uses the expansion joint and the acting force of inclined surfaces, so as to achieve overall contraction and clamping, thereby improving the anti-loosening performance.

Description

A locking nut assembly Technical Field

[0001] This invention relates to the field of anti-loosening nut technology, and in particular to an anti-loosening nut assembly. Background Technology

[0002] With the rapid development of my country's machinery industry, many mechanical devices require replaceable assembly mechanisms. Bolts and nuts are the most widely used detachable fasteners. The application of detachable fasteners can greatly reduce the manufacturing difficulty of machinery and improve its repair efficiency.

[0003] In practical applications, bolt and nut fasteners are often used in environments with high-frequency vibrations. Under such conditions, ordinary bolts and nuts may loosen, posing a significant safety hazard to production and construction. Summary of the Invention

[0004] To address the aforementioned problems, this invention aims to provide an anti-loosening nut assembly that utilizes the force of expansion joints and inclined planes to achieve overall contraction and tightening, thereby improving anti-loosening performance.

[0005] The technical problem solved by this invention can be achieved by the following technical solutions:

[0006] An anti-loosening nut assembly includes a nut body, on which an anti-loosening nut is fitted. The nut body has an anti-loosening receiving cavity, in which the anti-loosening nut is wholly or partially accommodated. The anti-loosening nut has a frustum portion, the outer wall of which is used to correspond to and fit with the inner wall of the anti-loosening receiving cavity. The frustum portion also has at least one slot.

[0007] The nut body is also provided with a first internal thread portion, and the anti-loosening nut is provided with a second internal thread portion. The first internal thread portion and the second internal thread portion are internal threads of the same size.

[0008] The anti-loosening nut is also provided with a nut seat, which is exposed outside the nut body and has an abutment surface.

[0009] When the frustum portion is fully embedded in the anti-loosening cavity, the contact surface abuts against one end face of the nut body.

[0010] The anti-loosening cavity is a truncated cone cavity structure.

[0011] The anti-loosening nut is also provided with a nut seat, and the anti-loosening receiving cavity includes a first receiving cavity and a second receiving cavity. The first receiving cavity is used to cooperate with the frustum portion, and the second receiving cavity is used to cooperate with the nut seat.

[0012] When the anti-loosening nut is fully accommodated in the anti-loosening cavity, a limiting part is provided on the nut body. The limiting part is located on the surface of the nut body where the anti-loosening nut is assembled, and the limiting part is used to limit the anti-loosening nut.

[0013] It also includes bolts, which include a bolt shank and a bolt cap, a nut body and a lock nut for threaded engagement with the bolt shank.

[0014] It is also provided with a compression nut, which is adjacent to and cooperates with the nut body, and the compression nut is located at the other end of the anti-loosening nut.

[0015] The anti-loosening nut is provided with at least one expansion joint, which is a gap that runs through the top and bottom.

[0016] The slotted joint is either a blind joint or a through joint.

[0017] The inner wall of the anti-loosening cavity and / or the outer wall of the frustum portion are provided with tooth-shaped patterns.

[0018] The advantages of this invention compared to the prior art are as follows: This invention utilizes a double nut structure, especially combined with an anti-loosening nut design, and uses the inclined plane force to achieve overall contraction and tightening, thereby improving the anti-loosening performance.

[0019] The features of the present invention can be clearly understood by referring to the drawings and the following detailed description of preferred embodiments. Attached Figure Description

[0020] Figure 1 is a schematic cross-sectional view of the overall structure of the present invention;

[0021] Figure 2 is a schematic diagram of the nut body structure of the present invention;

[0022] Figure 3 is a cross-sectional schematic diagram of the installation structure of the nut body and the anti-loosening nut of the present invention;

[0023] Figure 4 is a schematic diagram of the anti-loosening nut structure of the present invention;

[0024] Figure 5 is a schematic diagram of the overall structure of the present invention;

[0025] Figure 6 is a schematic diagram of the nut body and anti-loosening nut installation structure of the present invention;

[0026] Figure 7 is a cross-sectional schematic diagram of the installation structure of the nut body and the anti-loosening nut of the present invention;

[0027] Figure 8 is a schematic diagram of the nut body and anti-loosening nut installation structure of the present invention (II).

[0028] Figure 9 is a schematic diagram of the nut body and anti-loosening nut installation structure of the present invention;

[0029] Figure 10 is a cross-sectional schematic diagram of the installation structure of the nut body and the anti-loosening nut of the present invention.

[0030] Figure 11 is a schematic cross-sectional view of the nut body of the present invention;

[0031] Figure 12 is a schematic diagram of the anti-loosening nut structure of the present invention. Detailed Implementation

[0032] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below with reference to specific illustrations. Example 1

[0033] Referring to Figures 1 to 7, the present invention discloses an anti-loosening nut assembly, including a nut body 100, an anti-loosening nut 200 fitted on the nut body 100, and an anti-loosening receiving cavity 120 provided inside the nut body 100. The nut body 100 and the anti-loosening nut 200 are used to fasten together with a bolt.

[0034] In the specific structure, the anti-loosening nut 200 is completely housed within the anti-loosening receiving cavity 120, and the anti-loosening nut 200 is completely embedded in the nut body 100. A limiting part 101 is provided on the nut body 100, located on the surface of the nut body 100 where the anti-loosening nut 200 is assembled, and the limiting part 101 is used to limit the anti-loosening nut 200. In the specific structure, the limiting part 101 is located at the outer end face of the anti-loosening receiving cavity 120. When the anti-loosening nut 200 is completely housed within the anti-loosening receiving cavity 120, after assembly, the user can tap the limiting part 101 inward to seal the end face of the anti-loosening receiving cavity 120, preventing the anti-loosening nut 200 located within the anti-loosening receiving cavity 120 from detaching.

[0035] In other embodiments, during use, the limiting part 101 may deform under external pressure, thereby sealing the end face of the anti-loosening cavity 120 and causing the anti-loosening nut 200 located in the anti-loosening cavity 120 to disengage.

[0036] The limiting part 101 can adopt other equivalent embodiments, such as limiting flange, limiting ring, etc., and after use, it adheres to the outer surface of the nut body 100 and / or the anti-loosening nut 200.

[0037] In other embodiments, the limiting part 101 can be an independent limiting ring. After the anti-loosening nut 200 is fully installed in the anti-loosening receiving cavity 120 in the nut body 100, it can be sealed by welding to complete the product assembly and form an integral anti-loosening nut assembly.

[0038] In the specific structure, the frustum portion 210 is also provided with at least one slot 211. The slot 211 is either a blind slot or a through slot. Depending on the specifications, when the size is large, a through slot can be used, so that the anti-loosening nut 200 is divided into 2 or 3 parts, which are embedded in the anti-loosening receiving cavity 120 for pre-installation. The anti-loosening nut 200 can be multiple independent parts. Preferably, there are 2 slots 211, which are arranged at intervals. With the continuous contact between the frustum portion 210 and the anti-loosening receiving cavity 120, the force between the inclined surfaces makes the slot 211 form a deformation internal lock, increasing the clamping effect on the internal bolts.

[0039] The specific structure also includes a bolt 300, which comprises a bolt shank 310 and a bolt cap 320. A nut body 100 and a lock nut 200 are used to thread-mate with the bolt shank 310. Depending on the specifications, the lock nut assembly formed by the nut body 100 and the lock nut 200 may have the internal thread of the lock nut 200 threaded with the bolt shank 310, or both the nut body 100 and the lock nut 200 may have internal threads threaded with the bolt shank 310. A clamping nut 400 is also provided, which mates adjacently with the nut body 100. 0 is located at the other end of the assembly of the anti-loosening nut 200; when the nut body 100 is tightened by external force, the nut 400 is usually squeezed to squeeze the nut body 100. Because the conical part 210 in the anti-loosening nut 200 and the corresponding contact surface of the anti-loosening cavity 120 form an abutment, as the nut body 100 is continuously tightened, the anti-loosening nut 200 will be driven to rotate. As it comes into contact with the workpiece surface, after continuous tightening, the conical part 210 and the anti-loosening cavity 120 are subjected to the action of inclined plane force, combined with the deformation space formed by the slot 211, so that the anti-loosening nut 200 can cover and tighten the internal bolt rod 310.

[0040] In the specific structure, the anti-loosening cavity 120 is a frustum-shaped hollow structure.

[0041] This invention utilizes a double-nut structure, with a special anti-loosening nut design, and uses the force of the inclined plane to achieve overall contraction and tightening, thereby improving the anti-loosening performance. Example 2

[0042] Based on Embodiment 1 and in conjunction with Figures 8 to 12, the present invention discloses an anti-loosening nut assembly, including a nut body 100, an anti-loosening nut 200 fitted on the nut body 100, and an anti-loosening receiving cavity 120 provided inside the nut body 100. The nut body 100 and the anti-loosening nut 200 are used to fasten together with a bolt.

[0043] The anti-loosening nut 200 is partially housed in the anti-loosening cavity 120. The anti-loosening nut 200 is provided with a frustum 210. The lower part of the frustum 210 is a nut seat 220. The nut seat 220 is exposed outside the nut body 100. The outer wall of the frustum 210 is used to cooperate with the inner wall of the anti-loosening cavity 120.

[0044] In one embodiment, the nut seat 220 is provided with an abutment surface 221. When the frustum portion 210 is fully embedded in the anti-loosening receiving cavity 120, the abutment surface 221 abuts against one end face of the nut body.

[0045] In the specific structure, the frustum portion 210 is also provided with at least one slot 211, which is a blind slot; preferably, there are two or three slots 211 arranged at intervals. With the continuous contact between the frustum portion 210 and the anti-loosening cavity 120, the force between the inclined surfaces makes the slot 211 form a deformation internal lock, increasing the clamping effect on the internal bolts.

[0046] It also includes bolts, which consist of a bolt shank and a bolt cap, a nut body and a lock nut for threaded engagement with the bolt shank; a compression nut is also provided, which is adjacent to the nut body and located at the other end of the lock nut; when the nut body 100 is subjected to external force for tightening, the compression nut usually compresses the nut body, and because the frustum portion 210 in the lock nut 200 forms an abutment with the lock nut cavity 120, with continuous tightening, the nut body 100 will drive the lock nut 200 to rotate, and as the nut seat 220 abuts against the workpiece surface, after continuous tightening, the frustum portion 210 and the lock nut cavity 120, under the action of the inclined plane force, combined with the deformation space formed by the slot 211, enable the lock nut 200 to cover and tighten the internal bolt components. Example 3

[0047] In conjunction with any of the above embodiments, this embodiment discloses an anti-loosening nut assembly. As shown in Figures 1 to 4, the anti-loosening nut 200 is further provided with a nut seat 220. The anti-loosening receiving cavity 120 includes a first receiving cavity 121 and a second receiving cavity 122. The first receiving cavity 121 is used to cooperate with the frustum portion 210, and the second receiving cavity 122 is used to cooperate with the nut seat 220.

[0048] In this embodiment, the anti-loosening nut 200 is completely embedded in the anti-loosening receiving cavity 120. Compared with embodiment 1, the nut seat 220 is also embedded in this embodiment. Example 4

[0049] Based on any of the above embodiments, the present invention discloses an anti-loosening nut assembly, wherein the anti-loosening nut 200 is provided with at least one expansion joint 230, the expansion joint 230 being a vertically penetrating gap; the structure of the expansion joint 230 is optimized by adopting a vertically penetrating design, so that the anti-loosening nut 200 has deformation space.

[0050] In conjunction with the above, the nut body 100 is also provided with a first internal thread portion 110, and the anti-loosening nut 200 is provided with a second internal thread portion 210. The first internal thread portion 110 and the second internal thread portion 210 are internal threads of the same size. When the nut body 100 is tightened by an external force, the conical portion 210 in the anti-loosening nut 200 forms an abutment with the anti-loosening receiving cavity 120. With continuous tightening, the nut body 100 will drive the anti-loosening nut 200 to rotate. As it comes into contact with the workpiece surface, after continuous tightening, the conical portion 210 and the anti-loosening receiving cavity 120 are subjected to the action of the inclined plane force, combined with the deformation space formed by the expansion joint 230, so that the anti-loosening nut 200 can cover and tighten the internal bolts. Example 5

[0051] Based on any of the above embodiments, the present invention discloses an anti-loosening nut assembly, wherein the inner wall of the anti-loosening receiving cavity 120 and / or the outer wall of the frustum portion 210 are provided with toothed patterns 500. The toothed patterns 500 are used to increase the friction between the frustum portion 210 and the anti-loosening receiving cavity 120, improve the inclined plane force, and make the fit between the nut body 100 and the anti-loosening nut 200 more compact.

[0052] In combination with the above, the nut body 100 and the anti-loosening nut 200 are preferably hexagonal nuts.

[0053] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention in any way. Any simple modifications, equivalent changes, or alterations made to the above embodiments based on the technical principles of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A locking nut assembly, comprising a nut body, characterized in that: The nut body is also fitted with an anti-loosening nut. The nut body is provided with an anti-loosening receiving cavity. The anti-loosening nut is wholly or partially accommodated in the anti-loosening receiving cavity. The anti-loosening nut is provided with a frustum portion. The outer wall of the frustum portion is used to correspond and cooperate with the inner wall of the anti-loosening receiving cavity. The frustum portion is also provided with at least one slot.

2. A check nut assembly according to claim 1 wherein: The nut body is also provided with a first internal thread portion, and the anti-loosening nut is provided with a second internal thread portion. The first internal thread portion and the second internal thread portion are internal threads of the same size.

3. A check nut assembly according to claim 2, wherein: The anti-loosening nut is also provided with a nut seat, which is exposed outside the nut body and has an abutment surface.

4. The anti-loosening nut assembly according to claim 3, characterized in that: When the frustum portion is fully embedded in the anti-loosening cavity, the contact surface abuts against one end face of the nut body.

5. The anti-loosening nut assembly according to claim 4, characterized in that: The anti-loosening cavity is a frustum-shaped hollow structure.

6. The anti-loosening nut assembly according to claim 1, characterized in that: The anti-loosening nut is also provided with a nut seat, and the anti-loosening receiving cavity includes a first receiving cavity and a second receiving cavity. The first receiving cavity is used to cooperate with the frustum portion, and the second receiving cavity is used to cooperate with the nut seat.

7. The anti-loosening nut assembly according to claim 6, characterized in that: When the anti-loosening nut is fully accommodated in the anti-loosening cavity, a limiting part is provided on the nut body. The limiting part is located on the surface of the nut body where the anti-loosening nut is assembled, and the limiting part is used to limit the anti-loosening nut.

8. A locking nut assembly according to any one of claims 1 to 7, characterized in that: It also includes bolts, which include a bolt shank and a bolt cap, a nut body and a lock nut for threaded engagement with the bolt shank.

9. The anti-loosening nut assembly according to claim 8, characterized in that: It is also provided with a compression nut, which is adjacent to and cooperates with the nut body, and the compression nut is located at the other end of the anti-loosening nut.

10. The anti-loosening nut assembly according to claim 9, characterized in that: The anti-loosening nut is provided with at least one expansion joint, which is a gap that runs through the top and bottom.

11. The anti-loosening nut assembly according to claim 10, characterized in that: The slotted joint is either a blind joint or a through joint.

12. The anti-loosening nut assembly according to claim 11, characterized in that: The inner wall of the anti-loosening cavity and / or the outer wall of the frustum portion are provided with tooth-shaped patterns.

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