Nut and stud anti-misassembly structure

Abstract

The utility model discloses a nut and stud anti -misoperation structure relates to nut and stud technical field, including stud and with the nut screw connection of stud, the outer wall of stud is slidably sleeved with the collar, and the collar is sleeved on the outer wall of stud after stud penetrates the connection, the top surface of collar has six through grooves along the circumference of the center of the collar, the inside of through groove is equipped with support device, and the support device is used for supporting the warped board. The utility model discloses a one -way through mechanism of warped board and connecting column, has realized reliable anti -misoperation function, has fundamentally put an end to the nut loosening of the human reverse operation, is more active, more safe than traditional structure only prevents vibration and loosens, and the intuitive torque feedback is provided through elastic extrusion plate simultaneously, prevents the problem such as the thread silk of over -tightening and the collapse of connected member and so on, improves the safety and service life of the connecting pair.

Description

Technical Field

[0001] This utility model relates to the field of nut and stud technology, and in particular to a nut and stud anti-mistightening structure. Background Technology

[0002] In fields such as mechanical assembly, aerospace, automotive manufacturing, and building structures, threaded connections consisting of nuts and studs are one of the most basic and critical connection methods. The reliability and safety of this connection directly affect the stable operation of the entire equipment or structure.

[0003] In current automotive production, large bolts and nuts are commonly used to secure connections between components, such as engine mounts and axle connectors. These components must withstand high-frequency vibrations and complex operating conditions. To prevent nuts from loosening under vibration, impact, or variable load conditions, various anti-loosening technologies have been developed, such as using spring washers, double nuts, and applying thread-locking agents. These methods primarily focus on preventing nuts from "spontaneously" loosening due to external vibrations. However, in practice, another risk exists: due to operator error or negligence, incorrectly tightening nuts in the wrong direction during installation or maintenance can lead to insufficient connection force, causing the connector to collapse, or over-tightening can result in excessive bolt preload, potentially elongating the bolt, damaging the threads, and crushing the connected components. Such human error is particularly prone to occur in complex assembly or poor visibility conditions, potentially leading to serious safety accidents. Utility Model Content

[0004] The purpose of this utility model is to provide a nut and stud anti-mistightening structure to solve the problems mentioned in the background art, such as insufficient connection force and collapse of the connecting parts due to operator error or negligence during installation or maintenance, or excessive tightening leading to excessive bolt preload, which may stretch the bolt, damage the threads, or even crush the connected parts.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a nut stud anti-mistightening structure, comprising a stud and a nut threadedly connected to the stud, wherein a collar is slidably sleeved on the outer wall of the stud;

[0006] After the stud passes through the connector, the collar is sleeved on the outer wall of the stud. The top surface of the collar has six through slots arranged in a circular array along the center of the collar. A rocker plate is rotatably connected in the through slot. A support device is provided inside the through slot. The support device is used to support the rocker plate, so that one end of the rocker plate is tilted up.

[0007] The bottom surface of the nut is fixedly connected to six connecting posts arranged in a circular array along the center of the nut. The width of the connecting posts is greater than the width of the through slot. When the nut is tightened, the connecting posts move along the inclined surface of the rocker. When the nut is loosened, the raised end of the rocker blocks the connecting posts.

[0008] The top surface of the collar is provided with a limiting device, which is used to fix the collar after tightening and prevent the collar from rotating relative to the stud.

[0009] A compression plate is fixedly connected to the bottom surface of the collar, and the compression plate is used to prevent over-tightening.

[0010] Preferably, the support device includes a support column fixedly connected to the inner wall of the channel and a top rod fixedly connected to one end of the support column. The top rod is arched, and the top surface of the top rod abuts against the bottom surface of the rocker.

[0011] Preferably, a stop block is fixedly connected to the top surface of the through groove. The stop block is located above the connection between the rocker and the through groove, and the stop block is used to prevent the rocker from flipping in the opposite direction.

[0012] Preferably, the extrusion plate is arched and is a nickel-titanium alloy plate.

[0013] Preferably, the limiting device includes a side plate fixedly connected to the top surface of the collar. The sum of the thickness of the side plate and the width of the connecting post is less than the width of the collar. A limiting bolt is threaded to one side of the side plate. A vertical groove is provided on one side of the stud. One end of the limiting bolt extends through the side plate into the vertical groove.

[0014] Preferably, the support column and the top rod are integrally cast from a nickel-titanium alloy.

[0015] The technical effects and advantages of this utility model are as follows: This utility model achieves a reliable anti-mistightening function through the one-way passage mechanism of the rocker plate and the connecting column, fundamentally eliminating the loosening of the nut caused by human reverse operation. It is more proactive and safer than the traditional structure that only prevents vibration and loosening. At the same time, the elastic compression plate provides intuitive torque feedback, preventing problems such as thread stripping or crushing by the connecting parts due to over-tightening, thus improving the safety and service life of the connection pair. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0017] Figure 2 This is a schematic diagram of the collar structure of this utility model.

[0018] Figure 3 This is a schematic diagram of the nut structure of this utility model.

[0019] Figure 4 This is a schematic diagram of the support device structure of this utility model.

[0020] Figure 5 This is a schematic diagram of the collar part of this utility model.

[0021] In the diagram: 1. Stud; 11. Vertical groove; 2. Nut; 21. Connecting post; 3. Collar; 31. Through groove; 32. Support device; 321. Support post; 322. Top rod; 33. Rocker; 34. Stop; 4. Limiting device; 41. Side plate; 42. Limiting bolt; 5. Extrusion plate. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] This utility model provides, for example Figure 1-5 The nut and stud anti-mistightening structure shown includes a stud 1 and a nut 2 threadedly connected to the stud 1. A collar 3 is slidably sleeved on the outer wall of the stud 1.

[0024] After the stud 1 passes through the connector, the collar 3 is sleeved on the outer wall of the stud 1. The top surface of the collar 3 is arranged with six through slots 31 along the circumference of the center of the collar 3. A rocker plate 33 is rotatably connected in the through slots 31. A support device 32 is provided inside the through slots 31. The support device 32 is used to support the rocker plate 33, so that one end of the rocker plate 33 is raised.

[0025] The bottom surface of nut 2 is fixedly connected with six connecting posts 21 arranged in a circular array along the center of nut 2. The width of the connecting posts 21 is greater than the width of the through groove 31. When nut 2 is tightened, the connecting posts 21 move along the inclined surface of the rocker plate 33. When nut 2 is loosened, the rocker plate 33 blocks the connecting posts 21.

[0026] The top surface of the collar 3 is provided with a limiting device 4, which is used to fix the collar 3 after tightening and prevent the collar 3 from rotating relative to the stud 1.

[0027] A compression plate 5 is fixedly connected to the bottom surface of the collar 3. The compression plate 5 is used to prevent over-tightening.

[0028] During installation, the stud 1 is first passed through the connector, then the collar 3 is placed on the stud 1, and the elastic compression plate 5 at its bottom contacts the surface of the connected part. Next, the nut 2 is screwed into the stud 1. As the nut 2 rotates in the tightening direction, the connecting post 21 at its bottom contacts the end of the raised rocker 33. As the nut 2 continues to rotate, the connecting post 21 presses downwards against the rocker 33, causing it to rotate against the force of the support device 32 and become horizontal with the top surface of the collar 3, thus allowing the connecting post 21 to pass smoothly. After the connecting post 21 passes the rocker 33, the nut 2 can continue to be tightened until its bottom surface or the bottom end of the connecting post 21 contacts the compression plate 5. If tightening continues at this point, a noticeable elastic resistance will be felt, indicating that the preset tightening state has been reached.

[0029] It is worth noting that when the connecting post 21 rotates and contacts the collar 3, the collar 3 will not rotate synchronously with the connecting post 21 due to the friction between the extrusion plate 5 and the connecting object. When the nut 2 is tightened to the preload, the collar 3 is fixed by the limiting device 4 to prevent the nut 2 from rotating in the opposite direction, thereby effectively preventing the nut 2 from loosening.

[0030] The one-way passage mechanism of the rocker plate 33 and the connecting column 21 achieves a reliable anti-mistightening function, fundamentally eliminating the loosening of the nut 2 caused by reverse operation. It is more proactive and safer than the traditional structure that only prevents vibration and loosening. At the same time, the elastic compression plate 5 provides intuitive torque feedback, preventing problems such as thread stripping or crushing by the connecting parts due to over-tightening, thus improving the safety and service life of the connection pair.

[0031] like Figure 2 and Figure 5 As shown, the support device 32 includes a support column 321 fixedly connected to the inner wall of the through groove 31 and a top rod 322 fixedly connected to one end of the support column 321. The top rod 322 is arched, and the top surface of the top rod 322 abuts against the bottom surface of the rocker plate 33.

[0032] By utilizing the elastic deformation of the support column 321 and the top rod 322, the bottom surface of the rocker 33 is continuously pushed upward, thereby providing a stable restoring force to the rocker 33, so that it can automatically and quickly return to the rocked state when it is not compressed by the connecting column 21.

[0033] like Figure 5 As shown, a stop block 34 is fixedly connected to the top surface of the through groove 31. The stop block 34 is located above the connection between the rocker plate 33 and the through groove 31. The stop block 34 is used to prevent the rocker plate 33 from flipping in the opposite direction.

[0034] The stop block 34 is in close contact with the rocker plate 33, allowing the rocker plate 33 to rotate downwards and be flattened. However, when the rocker plate 33 is subjected to a reverse force and attempts to over-flip upwards, its back side will immediately contact the stop block 34 and be firmly locked in place, preventing the rocker plate 33 from tilting upwards in the opposite direction, which would create a gap between the connecting post 21 and the rocker plate 33 and cause the nut 2 to loosen.

[0035] like Figure 2 As shown, the extrusion plate 5 is arched and is made of nickel-titanium alloy. The extrusion plate 5 is manufactured into an arched metal sheet, and nickel-titanium alloy is selected as the material. Due to its superelasticity and shape memory effect, it can completely recover its original shape even after large deformation, providing stable and repeatable elastic reaction force.

[0036] like Figure 2 As shown, the limiting device 4 includes a side plate 41 fixedly connected to the top surface of the collar 3. The sum of the thickness of the side plate 41 and the width of the connecting post 21 is less than the width of the collar 3. A limiting bolt 42 is threadedly connected to one side of the side plate 41. A vertical groove 11 is provided on one side of the stud 1. One end of the limiting bolt 42 extends through the side plate 41 into the vertical groove 11.

[0037] Tighten the limiting bolt 42 so that its end is firmly pressed into and abuts against the pre-machined vertical groove 11 on the stud 1. The cooperation between the bolt and the vertical groove restricts the circumferential rotation of the collar 3, thereby preventing the collar 3 from rotating when the nut 2 rotates in the opposite direction.

[0038] like Figure 4 As shown, the support column 321 and the top rod 322 are integrally cast from nickel-titanium alloy;

[0039] The support column 321 and the arched top rod 322 are integrally formed by precision casting using nickel-titanium alloy material. This integral forming avoids stress concentration and weak points that may be caused by welding or assembly, making the support device 32 structure more robust. It is a perfect combination with the excellent performance of nickel-titanium alloy, resulting in an extremely long service life.

[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A nut-stud anti-mistightening structure, comprising a stud (1) and a nut (2) threadedly connected to the stud (1), characterized in that: The outer wall of the stud (1) is slidably sleeved with a collar (3); After the stud (1) passes through the connector, the collar (3) is sleeved on the outer wall of the stud (1). The top surface of the collar (3) is provided with six through slots (31) arranged in a circular array along the center of the collar (3). A rocker plate (33) is rotatably connected in the through slot (31). A support device (32) is provided inside the through slot (31). The support device (32) is used to support the rocker plate (33) so that one end of the rocker plate (33) is raised. The bottom surface of the nut (2) is fixedly connected with six connecting posts (21) arranged in a circular array along the center of the nut (2). The width of the connecting posts (21) is greater than the width of the through groove (31). When the nut (2) is tightened, the connecting posts (21) move along the inclined plane of the rocker (33). When the nut (2) is loosened, the raised end of the rocker (33) blocks the connecting posts (21). The top surface of the collar (3) is provided with a limiting device (4), which is used to fix the collar (3) after tightening and prevent the collar (3) from rotating relative to the stud (1). The bottom surface of the collar (3) is fixedly connected to a pressing plate (5), which is used to prevent over-tightening.

2. The nut and stud anti-mistightening structure according to claim 1, characterized in that: The support device (32) includes a support column (321) fixedly connected to the inner wall of the through groove (31) and a top rod (322) fixedly connected to one end of the support column (321). The top rod (322) is arched, and the top surface of the top rod (322) abuts against the bottom surface of the rocker (33).

3. The nut and stud anti-mistightening structure according to claim 1, characterized in that: A stop (34) is fixedly connected to the top surface of the through groove (31). The stop (34) is located above the connection between the rocker (33) and the through groove (31). The stop (34) is used to prevent the rocker (33) from flipping in the opposite direction.

4. The nut and stud anti-mistightening structure according to claim 1, characterized in that: The extrusion plate (5) is arched and is a nickel-titanium alloy plate.

5. The nut and stud anti-mistightening structure according to claim 1, characterized in that: The limiting device (4) includes a side plate (41) fixedly connected to the top surface of the collar (3). The sum of the thickness of the side plate (41) and the width of the connecting post (21) is less than the width of the collar (3). A limiting bolt (42) is threadedly connected to one side of the side plate (41). A vertical groove (11) is provided on one side of the stud (1). One end of the limiting bolt (42) extends through the side plate (41) into the vertical groove (11).

6. The nut and stud anti-mistightening structure according to claim 2, characterized in that: The support column (321) and the top rod (322) are integrally cast from nickel-titanium alloy.

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