Anti-loosening slotted nut assembly

By introducing arc-shaped fixtures and mild steel materials into the nut assembly, increasing the thread contact area, the problem of thread breakage is solved, and the protection and cost reduction of nuts are achieved.

CN223215571UActive Publication Date: 2025-08-12ZHEJIANG HUAYUAN AUTOMOBILE PARTS
View PDF 0 Cites 0 Cited by

Patent Information

Application Number
CN202422229334.8
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-09-11
Publication Date
2025-08-12
Estimated Expiration
2034-09-11

AI Technical Summary

Technical Problem

The thread contact area between existing nuts and bolts is small, which makes it easy to break under load, and cannot effectively prevent the connection from being loose.

Method used

An anti-loose grooved nut assembly including a shell and a curved fixture is designed to increase the thread contact area through the curved fixture, and a soft steel material and a restraining component are used to protect the nut. The curved fixture protects the nut when it is damaged by force.

Benefits of technology

The contact area of the thread is increased, the possibility of thread breakage is reduced, and the nut is protected when the arc-shaped fixture is damaged, reducing the overall manufacturing cost.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN223215571U_ABST
    Figure CN223215571U_ABST
Patent Text Reader

Abstract

According to the technical scheme, the anti-loosening groove nut assembly is characterized in that the anti-loosening groove nut assembly comprises a shell, a nut is connected into the shell, the shell is fixedly connected with two symmetrically-arranged arc-shaped fixing pieces, a cylindrical through hole is formed between the two arc-shaped fixing pieces, and a gap is formed between the two arc-shaped fixing pieces; one side, facing the other arc-shaped fixing piece, of each arc-shaped fixing piece is provided with an internal thread, the other side of each arc-shaped fixing piece is provided with an external thread, the maximum thread inner diameter of the internal threads is not larger than the maximum thread inner diameter of the nut, and the arc-shaped fixing pieces are connected with a fastening assembly connected with the external threads in a sliding mode. And the contact area between the threads is increased through the internal threads on the arc-shaped fixing piece, the possibility of thread breakage is reduced, meanwhile, the shell is further arranged to protect the nut, if the shell is damaged, the nut is used in the next anti-loosening groove nut assembly again subsequently, and the manufacturing cost is reduced.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] The utility model relates to a nut assembly, and more particularly to an anti-loosening slotted nut assembly. Background Art

[0002] Nuts are mainly used for fastening and connecting functions in mechanical equipment to prevent loose connections. Nuts cooperate with bolts or other fasteners to tightly fix two or more parts together to prevent the parts from separating due to external forces. When a force is applied to the bolt, the nut transfers this force to the connected parts, causing corresponding displacement or deformation between the connected parts. This requires the nut to withstand certain loads, such as tension, pressure and shear force. When a load is applied to the bolt or nut, the threads of the nut and the bolt, the nut and the plate, and the bolt and the plate will all bear this load together. The cooperation between the nut and the bolt is only in the thread interference, but the contact area between the threads is relatively small, which is the part most likely to break. Therefore, an anti-loosening slotted nut assembly is needed. The device can protect the nut while increasing the contact area between the threads and reducing the possibility of thread breakage.

[0003] In view of the above reasons, how to protect the nut while increasing the contact area between the threads and reducing the possibility of thread breakage is exactly the problem considered in this application. Utility Model Content

[0004] In view of the shortcomings of the existing technology, an anti-loosening slotted nut assembly is provided, which can protect the nut and increase the contact area between the threads, thereby reducing the possibility of thread breakage.

[0005] To achieve the above-mentioned purpose, the following technical solution is provided: an anti-loosening slotted nut assembly, comprising a shell, a nut connected inside the shell, two symmetrically arranged arc-shaped fixing parts fixedly connected to the shell, a cylindrical through hole formed in the middle of the two arc-shaped fixing parts, a gap provided between the two arc-shaped fixing parts, an internal thread provided on one side of the arc-shaped fixing part facing the other arc-shaped fixing part and an external thread provided on the other side, the maximum inner diameter of the internal thread being no greater than the maximum inner diameter of the nut, and the arc-shaped fixing part being slidably connected to a locking assembly connected to the external thread.

[0006] In summary, the above technical solution has the following beneficial effects: when the bolt and the nut are in use, they cooperate with each other to form a clamping mechanism, thereby fixing the various plates in the middle, and the situation in which a load is applied to the bolt or the nut can be considered that the plate vibrates due to various reasons, thereby impacting the bolt and the nut, and causing the bolt and the nut to move in a direction away from each other, thereby causing loosening. The direction of impact received by the bolt and the nut through the threads forms an angle approximately perpendicular to the direction of movement, so it is actually the threads of the bolt and the nut that are meshing with each other that bear the pressure, and the actual reason for the thread breakage is that the area of the meshing threads is too small, resulting in excessive pressure and causing damage. Therefore, if you want to reduce this pressure, the simplest way is to increase the area of the meshing threads;

[0007] In the present invention, two arc-shaped fixing members are provided as extensions to increase the contact area between the threads. During manufacturing, the nut is pre-placed in the housing. Since a gap is provided between the two arc-shaped fixing members and the maximum inner diameter of the internal thread is not larger than the maximum inner diameter of the nut, the arc-shaped fixing members will not hinder the normal use of the nut itself. After the nut is installed, the two arc-shaped fixing members can be tightened by the locking assembly. The two arc-shaped fixing members are close to each other, so that the internal threads on the arc-shaped fixing members will not only interfere with the threads of the screw like the nut, but the locking assembly used can be selected with a model with a slightly smaller inner diameter, so that the internal threads on the arc-shaped fixing members after being locked are embedded deeper than the threads of the nut. In this way, the area of the threads that mesh with each other can be actually expanded. Moreover, since the total area of the internal threads on the arc-shaped fixing members is larger than the total area of the threads on the nut, the possibility of thread breakage is reduced.

[0008] In addition, when subjected to excessive impact, the arc-shaped fixing part is destroyed first, which can protect the nut and reuse the nut in the next anti-loosening slotted nut assembly, reducing manufacturing costs;

[0009] The utility model provides two arc-shaped fixing members as extensions, and increases the contact area between the threads through the internal threads on the arc-shaped fixing members, thereby reducing the possibility of thread breakage. At the same time, a shell protection nut is also provided. If the shell is damaged, the nut can be reused in the next anti-loosening slot nut assembly, thereby reducing manufacturing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 A schematic diagram of the three-dimensional structure of the anti-loosening slot nut assembly;

[0011] Figure 2 This is a cross-sectional view of the housing of the first embodiment of the present invention;

[0012] Figure 3 It is a cross-sectional view of the housing of the second embodiment of the present invention;

[0013] Figure 4 It is a cross-sectional view of the restraining assembly in the present invention.

[0014] Reference numerals: 1, housing; 2, nut; 3, arc-shaped fixing member; 4, locking assembly;

[0015] 11. Accommodation slot; 12. Accommodation cavity; 13. Placement slot;

[0016] 31. Clearance; 32. Internal thread; 33. External thread;

[0017] 41. Retention sleeve; 42. Threaded groove; 43. Positioning ring; 44. Conflict piece; 45. Isolation gasket. DETAILED DESCRIPTION

[0018] The present invention will be further described below in conjunction with the accompanying drawings and embodiments. Identical components are denoted by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to directions in the accompanying drawings, and the terms "bottom," "top," "inner," and "outer" refer to directions toward or away from the geometric center of a particular component, respectively.

[0019] Reference Figure 1-4 As shown, the anti-loosening slotted nut assembly includes a shell 1, a nut 2 is connected to the shell 1, and the shell 1 is fixedly connected to two symmetrically arranged arc-shaped fixing members 3. The two arc-shaped fixing members 3 have cylindrical through holes in the middle, and a gap 31 is provided between the two arc-shaped fixing members 3. The arc-shaped fixing members 3 are provided with an internal thread 32 on one side facing the other arc-shaped fixing member 3 and an external thread 33 on the other side. The maximum inner diameter of the internal thread 32 is not greater than the maximum inner diameter of the nut 2. The arc-shaped fixing members 3 are slidably connected to a locking assembly 4 connected to the external thread 33;

[0020] When the bolt and nut 2 are in use, they cooperate with each other to form a clamping mechanism, thereby fixing the various plates in the middle. The situation in which a load is applied to the bolt or nut 2 can be considered that the plate vibrates due to various reasons, thereby impacting the bolt and nut 2 and causing the bolt and nut 2 to move away from each other, thereby causing loosening. The direction of the impact received by the bolt and nut 2 through the threads forms an angle approximately perpendicular to the direction of movement. Therefore, it is actually the threads of the bolt and nut 2 that are meshing with each other that bear the pressure. The actual reason for the thread breakage is that the area of the meshing threads is too small, resulting in excessive pressure and causing damage. Therefore, if you want to reduce this pressure, the simplest way is to increase the area of the meshing threads.

[0021] In the present invention, two arc-shaped fixing members 3 are provided as extensions to increase the contact area between the threads. During manufacturing, the nut 2 is placed in the housing 1 in advance. Since a gap 31 is provided between the two arc-shaped fixing members 3 and the maximum inner diameter of the internal thread 32 is not larger than the maximum inner diameter of the internal thread of the nut 2, the arc-shaped fixing members 3 will not hinder the normal use of the nut 2 itself. After the nut 2 is installed, the two arc-shaped fixing members 3 can be tightened by the locking assembly 4. The two arc-shaped fixing members 3 are close to each other, so that the internal thread 32 on the arc-shaped fixing member 3 will not only conflict with the thread of the screw like the nut 2, but the locking assembly 4 used can be selected with a slightly smaller inner diameter. The internal thread 32 on the arc-shaped fixing member 3 after being locked is embedded deeper than the thread of the nut 2. In this way, the area of the threads that mesh with each other can be actually expanded. Moreover, since the total area of the internal thread 32 on the arc-shaped fixing member 3 is larger than the total area of the thread on the nut 2, the possibility of thread breakage is reduced.

[0022] In addition, when subjected to excessive impact, the arc-shaped fixing member 3 is first damaged, which can protect the nut 2 and allow the nut 2 to be reused in the next anti-loosening slotted nut assembly, thereby reducing manufacturing costs;

[0023] The utility model provides two arc-shaped fixing members 3 as extensions, and increases the contact area between the threads through the internal threads 32 on the arc-shaped fixing members 3, thereby reducing the possibility of thread breakage. At the same time, a shell 1 is provided to protect the nut 2. If the shell 1 is damaged, the nut 2 can be reused in the next anti-loosening slot nut 2 assembly, thereby reducing manufacturing costs.

[0024] Furthermore, the housing 1 and the arc-shaped fixing member 3 are both made of mild steel;

[0025] Since the screw and nut 2 are usually made of hard steel, they are not elastic. Once damaged, the entire component cannot be used. The combination of the shell 1 and the arc-shaped fixing piece 3 can protect the nut 2. Moreover, due to the effect of the locking component 4, the internal thread 32 on the arc-shaped fixing piece 3 after being locked is embedded deeper in the thread of the screw than the thread of the nut 2, that is, the contact area between the internal thread 32 on the arc-shaped fixing piece 3 and the thread of the screw is larger. Therefore, from the overall distribution of pressure, the pressure on the arc-shaped fixing piece 3 is much greater than the pressure on the nut 2, and the arc-shaped fixing piece 3 will be damaged before the nut 2. On this basis, in order to reduce the probability of damage to the arc-shaped fixing piece 3, the shell 1 and the arc-shaped fixing piece 3 are made of soft steel material, so that the shell 1 and the arc-shaped fixing piece 3 can produce a certain degree of deformation, dispersing part of the pressure to the shell 1, thereby reducing the probability of damage to the arc-shaped fixing piece 3;

[0026] In addition, the arc-shaped fixing member 3 will be deformed to a certain extent by the locking component 4 to achieve the purpose of bringing the two arc-shaped fixing members 3 closer to each other. Therefore, it is necessary to use a soft steel material to make the arc-shaped fixing member 3 have a certain elasticity.

[0027] Furthermore, the cross section of the internal thread 32 is triangular, and the pitch of the internal thread 32 is the same as the pitch of the thread of the nut 2;

[0028] Since the maximum inner diameter of the internal thread 32 is not larger than the maximum inner diameter of the nut 2, and the two arc-shaped fixing parts 3 may be close to each other due to various reasons, the pitch of the internal thread 32 is set to be the same as the pitch of the nut 2 thread for the purpose of convenient installation. In this way, the arc-shaped fixing part 3 can wrap around the screw like installing the nut 2, and after the two arc-shaped fixing parts 3 continue to move relative to each other, the internal thread 32 can better fit the thread of the screw, thereby maximizing the contact area between the threads.

[0029] Furthermore, the locking assembly 4 includes a locking sleeve 41 slidably connected to the arc-shaped fixing member 3, a thread groove 42 slidably connected to the external thread 33 is provided on the inner side of the locking sleeve 41, a positioning ring 43 is fixedly connected to the outer side of the locking sleeve 41, and the positioning ring 43 is fixedly connected to an interference member 44 fixedly connected to the locking sleeve 41;

[0030] The restraining sleeve 41 directly controls the relative movement distance of the two arc-shaped fixing members 3 by selecting different inner diameters. In order to facilitate rotation, the resistance member 44 is provided to increase the contact area during manual rotation, and the positioning ring 43 is provided to resist the tool when the tool is rotated, making it easier for the user to locate the contact position of the tool.

[0031] Furthermore, the locking assembly 4 further includes an isolation gasket 45 that abuts against both the housing 1 and the positioning ring 43 , and the inner diameter of the isolation gasket 45 is not greater than the maximum inner diameter of the thread groove 42 ;

[0032] Since the restraining sleeve 41 can be selected to have different inner diameters, the restraining sleeve 41 has an extreme position after controlling the two arc-shaped fixing members 3 to approach each other. The isolation gasket 45 is mainly used to limit excessive rotation of the restraining sleeve 41. Therefore, by selecting isolation gaskets 45 of different thicknesses to contact the shell 1 and the positioning ring 43, the restraining sleeve 41 is prevented from continuing to rotate after rotating to the extreme position and causing damage.

[0033] Furthermore, the cross-section of the external thread 33 is a trapezoidal shape rotated 90°. Since the restraining sleeve 41 itself is used as a component for fixing a position, there is no need to specifically consider the anti-destruction performance of the internal thread 32. Only the anti-destruction performance of the external thread 33 needs to be considered. The trapezoidal shape rotated 90° can increase the thickness of the external thread 33 in the vertical direction, thereby reducing the possibility of damage to the external thread 33.

[0034] Furthermore, a receiving groove 11 for receiving the nut 2 is provided on a side of the housing 1 away from the arc-shaped fixing member 3, and the edge of the housing 1 away from the arc-shaped fixing member 3 is rounded;

[0035] like Figure 2 In the first embodiment shown, the nut 2 is accommodated in the accommodating groove 11 and one side is directly in contact with the plate. One side of the shell 1 is also directly in contact with the plate. It is suitable for use on plates with higher elasticity. This can better fit the plate and transfer part of the impact to the plate, essentially distributing the impact. The edge of the shell 1 is chamfered to facilitate the subsequent removal of the shell 1.

[0036] Furthermore, the housing 1 is provided with a receiving cavity 12 for receiving the nut 2 and a placement groove 13 communicating with the receiving cavity 12 and for installing a gasket on a side away from the arc-shaped fixing member 3;

[0037] like Figure 3 The second embodiment shown is different from the first embodiment in that the nut 2 is placed in the accommodating cavity 12, and a gasket is provided in the placement groove 13 to abut the nut 2 and the plate. It is suitable for use on plates with higher strength. The gasket increases the contact area and reduces the pressure per unit area, preventing the nut 2 from being damaged due to excessive pressure.

[0038] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, certain improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. Anti-loosening slotted nut assembly, characterized in that: It includes a shell, a nut is connected inside the shell, and the shell is fixedly connected to two symmetrically arranged arc-shaped fixing parts. There is a cylindrical through hole in the middle of the two arc-shaped fixing parts, and a gap is provided between the two arc-shaped fixing parts. The arc-shaped fixing part is provided with an internal thread on one side facing the other arc-shaped fixing part and an external thread on the other side. The maximum inner diameter of the internal thread is not greater than the maximum inner diameter of the nut. The arc-shaped fixing part is slidably connected to a locking component connected to the external thread.

2. The anti-loosening slotted nut assembly according to claim 1, characterized in that: The shell and the arc-shaped fixing piece are both made of mild steel.

3. The anti-loosening slotted nut assembly according to claim 1, characterized in that: The cross section of the internal thread is triangular, and the pitch of the internal thread is the same as the pitch of the nut thread.

4. The anti-loosening slotted nut assembly according to claim 1, characterized in that: The locking assembly includes a locking sleeve slidably connected to the arc-shaped fixing member, a thread groove slidably connected to the external thread is provided on the inner side of the locking sleeve, a positioning ring is fixedly connected to the outer side of the locking sleeve, and the positioning ring is fixedly connected to a resistance member fixedly connected to the locking sleeve.

5. The anti-loosening slotted nut assembly according to claim 4, characterized in that: The locking assembly further comprises an isolation gasket abutting against both the shell and the positioning ring, wherein the inner diameter of the isolation gasket is not greater than the maximum inner diameter of the thread groove.

6. The anti-loosening slotted nut assembly according to claim 1, characterized in that: The cross section of the external thread is a trapezoidal shape rotated by 90 degrees.

7. The anti-loosening slotted nut assembly according to claim 6, characterized in that: A receiving groove for receiving a nut is provided on a side of the shell away from the arc-shaped fixing piece, and the edge of the shell away from the arc-shaped fixing piece is chamfered.

8. The anti-loosening slotted nut assembly according to claim 7, characterized in that: A receiving cavity for receiving the nut and a placement groove communicated with the receiving cavity and used for installing the gasket are provided on one side of the shell away from the arc-shaped fixing piece.