Detachable anti-loosening fastening assembly and using method thereof
By setting the mating structure of the spring plate and the limiting groove on the nut and the adjustment screw design, the problem of cracking and disassembly difficulty in the self-locking structure of the wedge block is solved, and the removability and reuse of the nut is realized, reducing the problem of the problem of cracking and disassembly in the tightening process. Maintenance costs.
Patent Information
- Application Number
- CN202411609971.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-12
- Publication Date
- 2025-01-07
AI Technical Summary
The existing wedge-shaped block self-locking structure is prone to cause wedge-shaped bumps to crack and plastic deformation during the nut tightening process, lose their biting function, and cannot be disassembled, limiting its scope of use and increasing maintenance costs.
A detachable anti-loosening fastening assembly is designed, adopting a matching structure between the spring plate and the limiting groove, which avoids cracking through the elastic deformation of the spring plate, and realizes the removable main nut by adjusting the screw and universal joint design. to ensure reuse of the assembly.
It effectively avoids cracking and plastic deformation of wedge-shaped bumps, ensures the integrity of the anti-reversal function, and reduces equipment maintenance costs, realizing the reuse and efficient disassembly of the main nut.
Smart Images
Figure CN119267412A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a detachable anti-loosening fastening assembly and a use method thereof. Background Art
[0002] In order to prevent nuts, washers and other fasteners from rotating due to vibration, causing the nuts to loosen, the fastened parts to move, and the fastening to fail, anti-loosening fasteners have long been a research direction. Among them, the self-locking structure of the wedge block has been widely used and a variety of products have been developed.
[0003] The wedge block self-locking structure is composed of wedge-shaped protrusions arranged on the opposite sides of the nut and the gasket. After the nut is tightened, the wedge-shaped protrusions on the nut and the gasket bite each other to form a self-locking structure. During the rotation of the nut, the wedge-shaped protrusions on the nut and the gasket approach and squeeze each other. Before the wedge-shaped protrusions on the nut and the gasket reach the set bite degree, the wedge-shaped protrusions will undergo multiple deformations due to mutual squeezing, which will cause some of the wedge-shaped protrusions to break. In addition, during the tightening process of the nut, some of the wedge-shaped protrusions may also undergo plastic deformation, causing them to lose their bite function.
[0004] In addition, since the wedge-shaped protrusion forms a self-locking function and has a nut anti-loosening function, the nut cannot be disassembled. When the nut needs to be disassembled, it can only be disassembled destructively. The guide gasket and the nut cannot be used again, and the destructive disassembly method will also reduce the disassembly efficiency, so that the wedge-shaped block self-locking structure is generally only used in areas that need to be kept tight for a long time and do not need to be disassembled, and is rarely used in areas with a high number of disassembly times, which limits the scope of use of the wedge-shaped block self-locking structure. In addition, destructive disassembly also leads to an increase in equipment maintenance costs. Summary of the invention
[0005] In order to solve at least one of the problems in the prior art that, during the tightening process of the nut, part of the wedge-shaped protrusions may be broken due to multiple deformations of the wedge-shaped protrusions, and the wedge-shaped self-locking structure cannot be disassembled, the present application first proposes a detachable anti-loosening fastening assembly, which includes a main nut and a gasket, wherein the central axis of the main nut extends along a first axial direction; the end surface of the main nut facing the gasket is formed as a first contact surface, and the end surface of the gasket facing the main nut is formed as a second contact surface, and a plurality of limiting grooves are provided on the gasket, and the limiting grooves penetrate the second contact surface along the first axial direction;
[0006] A plurality of cavities are arranged on the main nut, and the cavities penetrate the first contact surface along the first axial direction. A spring plate is arranged in each cavity, and the opposite ends of the spring plate are respectively a fixed end and a free end, and the fixed end of the spring plate is fixed on the inner wall of the cavity; the free end of the spring plate extends obliquely relative to the first plane, and the inclination direction of the free end is opposite to the screwing direction when the main nut is tightened, and the first plane is perpendicular to the first axial direction. In a free state, the free end of the spring plate extends outward from the cavity along the inclination direction; when an external force pushes the free end of the spring plate along the first axial direction, the spring plate can be completely accommodated in the cavity, and when the external force is removed, the free end of the spring plate can extend outward from the cavity;
[0007] The number of limiting grooves is the same as that of cavities. When observed along the first axial direction, when the main nut is rotated, each cavity can correspond to a limiting groove, and the spring plate in the cavity can extend into the corresponding limiting groove; when the main nut is screwed along the tightening direction of the main nut, the spring plates can be accommodated in the cavities under the push of the gasket, and when the spring plates reach the projection area of the limiting groove in the first axial direction, the spring plates can be inserted into the limiting groove to avoid reversal of the main nut.
[0008] The gasket is annular, and the limiting grooves are evenly spaced along the central axis of the gasket. The accommodating cavity is evenly spaced along the central axis of the main nut. When the central axis of the gasket coincides with the central axis of the main nut, the accommodating cavity can correspond to the limiting grooves one by one, and the spring plate in the accommodating cavity can extend into the corresponding limiting groove.
[0009] In the present application, an anti-reversal structure in which a spring plate and a limiting groove cooperate is adopted. During the process of screwing and tightening the main nut, the spring plate will be compressed and elastically deformed under the push of the gasket, thereby avoiding plastic deformation or cracking of the spring nut, and ensuring the integrity of the anti-reversal structure. After the main nut is tightened, the spring plate extends into the limiting groove. When the main nut tends to reverse, the spring plate will be pressed against the inner wall of the limiting groove, thereby avoiding the reversal of the main nut. In the present application, the spring plate can also be stored in the cavity, the mutual pressure between the spring plate and the limiting groove is cancelled, and then the main nut is rotated in the opposite direction, so that the main nut can be disassembled and reused, reducing the maintenance cost of the equipment.
[0010] Furthermore, in order to keep the spring plate stably in the limiting groove and avoid the reversal of the main nut, a resistance surface is provided in the limiting groove, and the resistance surface extends along the first axial direction, and the resistance surface faces the screwing direction when the main nut is tightened. The free end of the spring plate can press against the resistance surface to avoid the reversal of the main nut. If the tightening direction of the main nut is regarded as the flow direction of the fluid, the resistance surface is located on the upstream side of the tightening direction of the main nut. Since the resistance surface extends along the first axial direction, and the free end of the spring plate extends into the limiting groove along the inclined direction, when the main nut tends to reverse, the spring plate will press against the resistance surface, thereby ensuring that the reversal of the main nut is avoided.
[0011] Furthermore, corresponding to each cavity, an adjustment hole extending along the first axis direction is provided on the main nut, one end of the adjustment hole is connected to the corresponding cavity, and the other end of the adjustment hole passes through the end face of the main nut away from the first contact face; an adjustment screw is provided in each adjustment hole, one end of the adjustment screw is fixed to the free end of the spring plate, and the other end of the adjustment screw extends out of the end face of the main nut away from the first contact face and then is screwed with an auxiliary nut, which can be screwed to receive the spring plate into the cavity or to make the free end of the spring plate extend out of the cavity. By using the auxiliary nut and the adjustment screw, the spring plate can be received into the cavity through the spring plate, thereby eliminating the anti-reversal capability of the spring plate on the main nut, and the main nut can be disassembled, so as to reuse the main nut.
[0012] Furthermore, a pad is provided at one end of the main nut away from the first contact surface, and the adjusting screw freely passes through the pad and then is screwed with the auxiliary nut, and the auxiliary nut is pressed against the pad;
[0013] A threaded section and a screwing section are provided on the outer peripheral surface of the main nut, wherein the threaded section is located on the side of the screwing section away from the first contact surface, and the screwing section is used to screw the main nut; a sleeve nut is screwed on the threaded section, and when viewed along the first axis, the gasket at least partially covers the sleeve nut, so that when the sleeve nut is screwed in a direction away from the first contact surface, the gasket can be pushed to move in a direction away from the first contact surface; screwing the sleeve nut can make the gasket move back and forth along the first axis, and drive the adjusting screw to move back and forth along the first axis. This design can use the sleeve nut to move all the adjusting screws in a direction away from the gasket at one time, so that all the spring plates can be collected into the cavity at one time, improving the working efficiency.
[0014] Furthermore, the adjusting screw is connected to the spring plate via a universal joint. When the spring plate enters and exits the cavity, the surface orientation of the spring plate will also change, thereby changing the extension direction of the adjusting screw. The universal joint can keep the adjusting screw extending along the first axis.
[0015] Specifically, in the direction of the first axis, the height of the spring plate extending out of the cavity is 2-3mm. When the spring plate freely extends out of the cavity, the adjusting screw is coaxially arranged with the adjusting hole, and the inner diameter of the adjusting hole is 4-5mm larger than the outer diameter of the adjusting screw. When the main nut and the gasket are pressed against each other, the height of the spring plate extending into the limiting groove is 2-3mm, which enables the spring plate to be stably pressed against the inner wall of the adjusting cavity. The inner diameter of the adjusting hole is 4-5mm larger than the outer diameter of the adjusting screw to accommodate the displacement of the adjusting screw in the direction perpendicular to the first axial direction caused by the spring plate extending out or being retracted into the cavity.
[0016] Furthermore, the bottom surface of the limiting groove is an inclined surface, and the bottom surface extends obliquely in the direction opposite to the screwing direction when the main nut is tightened, away from the second contact surface. This design can minimize the weakening of the gasket strength caused by the setting of the limiting groove.
[0017] Secondly, the present application also provides a method for using the detachable anti-loosening fastening assembly described in any one of the above items, the method comprising a tightening step and a disassembly step of the main nut, the tightening step comprising the following sub-steps:
[0018] (1.1) The bolt is passed through the first component and the second component in sequence, and then the gasket is sleeved on the bolt, and then the main nut is screwed on the bolt, and the gasket is located between the second component and the main nut; the limiting groove of the gasket faces the main nut, and the cavity of the main nut faces the gasket;
[0019] (1.2) Tighten the main nut in the tightening direction until the tightening torque of the main nut reaches the set torque range and each spring plate is inserted into a limit groove, thus completing the tightening of the main nut;
[0020] The disassembly step includes the following sub-steps:
[0021] (2.1) The auxiliary nut is screwed in a direction away from the gasket to move the adjusting screw in a direction away from the gasket, and the spring plate is received in the cavity; or the sleeve nut is screwed in a direction away from the gasket to move the backing plate in a direction away from the gasket, and the spring plate is received in the cavity;
[0022] (2.2) Turn the main nut in the opposite direction of the tightening direction to remove it.
[0023] Furthermore, in sub-step (2.1), the main nut is first screwed in the tightening direction to move the spring plate in the circumferential direction by 0.1-0.2 mm, and then the auxiliary nut or sleeve nut is screwed to accommodate the spring plate in the cavity.
[0024] During the operation of the main nut, that is, during the process of the main nut being tightened, due to equipment vibration and other reasons, the main nut will be reversed, causing the spring plate to press against the resistance surface, so that the spring plate and the resistance surface remain in a state of mutual compression, thereby limiting the continuous reversal of the main nut. Therefore, when the spring plate is received into the cavity to facilitate the loosening of the main nut, there will be a large resistance between the spring plate and the resistance surface, which is not conducive to receiving the spring plate into the cavity. In order to reduce the resistance, in this application, before screwing the auxiliary nut or the sleeve nut, the main nut is first screwed a small amount in the tightening direction, so that the spring plate moves 0.1-0.2mm in the circumferential direction, so that a slight gap is generated between the spring plate and the resistance surface, eliminating the mutual compression between the spring plate and the resistance surface, and then the auxiliary nut or the sleeve nut is screwed, so that the spring plate can be relatively easily received into the cavity. Since the height of the spring plate extending into the limiting groove in the direction of the first axis is only 2-3 mm, during the process of the spring plate being received into the cavity, the length change of the spring plate in the direction perpendicular to the first axis will not exceed 0.03 mm. Therefore, the spring plate is moved in the axial direction by 0.1-0.2 mm, which can eliminate the mutual extrusion between the spring plate and the resistance surface, and can relatively easily receive the spring plate into the cavity. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Figure 1 It is a structural schematic diagram of an embodiment of the present invention.
[0026] Figure 2 yes Figure 1 Top view of the .
[0027] Figure 3 It is a structural diagram of the main nut.
[0028] Figure 4 yes Figure 3 Top view of the .
[0029] Figure 5 yes Figure 2 The view from the main AA direction.
[0030] Figure 6 This is the view after the pad has been moved away from the shim.
[0031] Figure 7 yes Figure 5 Exploded diagram of . DETAILED DESCRIPTION
[0032] See also Figure 1-Figure 7 In the accompanying drawings, the direction of the first arrow Y indicates the direction of the first axis, the direction of the second arrow U indicates the first direction, and the direction of the third arrow D indicates the second direction. Figure 2 In the figure, for clarity, the backing plate and the sleeve nut are removed, and the first component and the second component are not shown.
[0033] A detachable anti-loosening fastening assembly, comprising a main nut 20 and a gasket 31. Figure 1 In the embodiment, the main nut 20 and the washer 31 are both mounted on the bolt 10, and the main nut is in a tightened state, that is, the main nut 20 and the washer 31 are both in a working state. In this embodiment, the bolt includes a main screw 12 and a bolt head 11 integrally formed at one end of the main screw, the bolt 10 extends in a vertical direction, the central axis of the main nut 20 extends in a first axis direction, so that the first axis direction extends in a vertical direction, wherein the first direction is upward, and the second direction is downward.
[0034] The bolt 10 passes through the first component 81 and the second component 82 in sequence from bottom to top in the vertical direction. The first component is located on the lower side of the second component, the bolt head 11 is located on the lower side of the first component, the main nut is screwed on the main screw 12 of the bolt, and the main nut is located on the upper side of the second component. The gasket is in a circular ring shape and is sleeved on the main screw, and the gasket is located between the main nut and the second component.
[0035] The end surface of the main nut 20 facing the gasket 31 is formed as a first contact surface 26, and the end surface of the gasket facing the main nut is formed as a second contact surface 36. Six limiting grooves 32 are arranged on the gasket, and the six limiting grooves 32 are evenly spaced around the central axis of the gasket. The limiting grooves penetrate the second contact surface 36 upward, that is, the limiting grooves penetrate the second contact surface along the first axis direction.
[0036] Six cavities 44 are arranged on the main nut 20, and the six cavities 44 are evenly spaced around the central axis of the main nut 20. The cavities penetrate the first contact surface 26 downward, that is, the cavities penetrate the first contact surface along the first axial direction. When the central axis of the gasket coincides with the central axis of the main nut, the cavities can correspond to the limiting grooves one by one, and the spring plates in the cavities can extend into the corresponding limiting grooves.
[0037] A spring plate 45 is provided in each cavity 44, and the opposite ends of the spring plate 45 are a fixed end 451 and a free end 452, respectively. The fixed end 451 of the spring plate is fixed on the inner wall of the cavity. The free end 452 of the spring plate extends downward along an inclined direction, and the inclined direction of the free end is opposite to the screwing direction when the main nut is tightened. That is, the free end of the spring plate extends obliquely relative to the first plane, and the inclined direction of the free end is opposite to the screwing direction when the main nut is tightened. The first plane is perpendicular to the first axial direction. In this embodiment, the first plane is a horizontal plane. The length of the spring plate is controlled at 3-10mm, that is, the distance between the end face of the fixed end and the end face of the free end is controlled at 3-10mm. The larger the inner diameter of the main nut, the longer the length of the spring plate can be. In this embodiment, the nominal diameter of the main nut is M50, and the length of the spring plate is 5mm.
[0038] In the free state, the free end of the spring plate extends downwardly out of the cavity along the inclined direction. That is, in the free state, the free end of the spring plate extends outwardly out of the cavity along the inclined direction. When an external force pushes the free end of the spring plate along the first axis direction, the spring plate can be completely accommodated in the cavity. When the external force is removed, the free end of the spring plate can extend outwardly out of the cavity.
[0039] There are six limiting grooves and six cavities, and the numbers of the two are the same. When the main nut is rotated in the vertical direction, each cavity can correspond to a limiting groove, and the spring plate in the cavity can extend into the corresponding limiting groove. When the main nut is screwed in the tightening direction of the main nut, the spring plates can be accommodated in the cavity under the push of the gasket, and when the spring plates reach the top of the limiting grooves, the spring plates can be inserted into the limiting grooves to avoid the reversal of the main nut. That is, when the spring plates reach the projection area of the limiting grooves in the direction of the first axis, the spring plates can be inserted into the limiting grooves to avoid the reversal of the main nut. The direction of the fourth arrow S in the accompanying drawings indicates the screwing direction of the main nut when tightening, that is, the direction of the fourth arrow S is the tightening direction of the main nut.
[0040] To ensure that the spring plate can be stably maintained in the limiting groove, in this embodiment, a resistance surface 34 is provided in the limiting groove 32, the resistance surface extending in the vertical direction and facing the screwing direction when the main nut is tightened, and the free end 452 of the spring plate 45 can press against the resistance surface 34, so that the spring plate 45 and the gasket are engaged together to prevent the main nut 20 from reversing. If the tightening direction of the main nut is regarded as the flow direction of the fluid, the resistance surface is located on the upstream side of the tightening direction of the main nut.
[0041] The bottom surface 33 of the limiting groove 32 is an inclined surface, which extends downwardly in the opposite direction of the screwing direction when the main nut is tightened, that is, the bottom surface of the limiting groove 32 extends in the opposite direction of the screwing direction when the main nut is tightened toward the direction away from the second contact surface.
[0042] In this embodiment, corresponding to each cavity 44, an adjustment hole 25 extending along the first axis direction is opened on the main nut, one end of the adjustment hole is connected to the corresponding cavity 44, and the other end of the adjustment hole passes through the end face of the main nut away from the first contact face, that is, the other end of the adjustment hole passes through the upper end face of the main nut. An adjustment screw 41 is arranged in each adjustment hole, one end of the adjustment screw 41 is fixed to the free end 452 of the spring plate, and the other end of the adjustment screw extends out of the upper end face of the main nut and is screwed with an auxiliary nut 42. Screwing the auxiliary nut can put the spring plate into the cavity, or make the free end of the spring plate extend out of the cavity. Specifically in this embodiment, each adjustment screw 41 is connected to the free end of the spring plate via a universal joint 43.
[0043] A pad is provided on the upper end surface of the main nut. A screw hole 52 is provided on the pad corresponding to each adjusting screw 41 . The adjusting screw 41 freely passes through the corresponding screw hole and then is screwed with the auxiliary nut 42 , which is pressed against the pad 51 .
[0044] A threaded section 23 and a screwing section 22 are provided on the outer circumferential surface of the main nut 20, wherein the threaded section 23 is located on the upper side of the screwing section 22, that is, the threaded section is located on the side of the screwing section away from the first contact surface. The screwing section has an outer circumferential surface in a regular hexagonal shape, and the main nut 20 can be screwed through the screwing section using a tool such as a wrench, that is, the screwing section is used to screw the main nut.
[0045] An external thread is provided on the outer circumferential surface of the threaded section, and the sleeve nut 29 is screwed on the external thread of the threaded section. When viewed in the vertical direction, the backing plate completely covers the sleeve nut, and the sleeve nut has an outer circumferential surface in the shape of a regular hexagon, so that the sleeve nut can be screwed with a tool such as a wrench. It can be understood that in other embodiments, the backing plate can only partially cover the sleeve nut, that is, when viewed in the direction of the first axis, the backing plate at least partially covers the sleeve nut, so that when the sleeve nut is screwed in a direction away from the first contact surface, the backing plate can be pushed to move in a direction away from the first contact surface. When the sleeve nut is screwed, the backing plate can reciprocate along the first axis and drive the adjusting screw to reciprocate along the first axis. Figure 6 In the process, the sleeve nut is screwed in a direction away from the first contact surface, so that the gasket 51 moves in a direction away from the first contact surface, and drives the spring plate 45 to be completely accommodated in the cavity 44, releasing the engagement between the spring plate 45 and the gasket, and the main nut can be screwed in the opposite direction of the tightening direction and removed.
[0046] In this embodiment, in the first axial direction, the height of the spring plate extending out of the cavity is 2.5 mm, that is, when the main nut and the gasket are pressed against each other, the height of the spring plate extending into the limiting groove 32 is 2.5 mm. It can be understood that in other embodiments, the height of the spring plate extending out of the cavity can also be 2 mm, 2.2 mm, 2.7 mm or 3 mm, or other values between 2-3 mm.
[0047] When the adjusting screw 41 drives the free end of the spring plate to move upward and accommodates the spring plate in the cavity, the connection point between the recovery adjusting screw and the spring plate produces a small displacement in the horizontal direction, thereby driving the adjusting screw to produce a small displacement in the horizontal direction.
[0048] When the spring plate freely extends out of the cavity, the adjusting screw 41 is coaxially arranged with the adjusting hole 25, and the inner diameter of the adjusting hole is 4 mm larger than the outer diameter of the adjusting screw. It is understood that in other embodiments, the inner diameter of the adjusting hole can also be 4.3 mm, 4.6 mm or 5 mm larger than the outer diameter of the adjusting screw, or other data between 4-5 mm.
[0049] The following is an explanation of the method for using the above-mentioned detachable anti-loosening fastening assembly, which specifically includes the steps of fastening and disassembling the main nut.
[0050] The tightening step includes the following steps:
[0051] (1.1) The bolt is passed through the first component and the second component from bottom to top in sequence, and then the gasket is placed on the main screw of the bolt, and then the main nut is screwed on the main screw, with the gasket located between the second component and the main nut; the limiting groove of the gasket faces the main nut, and the cavity of the main nut faces the gasket.
[0052] (1.2) Tighten the main nut in the tightening direction until the tightening torque of the main nut reaches the set torque range and each spring plate is inserted into a limit groove, thus completing the tightening of the main nut.
[0053] The disassembly step includes the following sub-steps:
[0054] (2.1) The auxiliary nut is screwed in a direction away from the gasket to move the adjusting screw in a direction away from the gasket, and the spring plate is received in the cavity. It is understood that in another embodiment, the sleeve nut can also be screwed in a direction away from the gasket, and the sleeve nut can be used to push the gasket plate to move in a direction away from the gasket, thereby driving the adjusting screw to move in a direction away from the gasket, and the spring plate is received in the cavity.
[0055] In the process of keeping the main nut tight, due to vibration and other reasons, the main nut may be reversed, causing the spring plate to press against the resistance surface 34, resulting in mutual extrusion between the spring plate and the resistance surface, thereby limiting the continuous reversal of the main nut. Therefore, when the spring plate is received into the cavity, there will be a large resistance between the spring plate and the resistance surface. In order to reduce this resistance, in this embodiment, before screwing the auxiliary nut or the sleeve nut, the main nut is first screwed a small amount in the tightening direction to move the spring plate in the circumferential direction by 0.1-0.2mm, so that a slight gap is generated between the spring plate and the resistance surface, eliminating the mutual extrusion between the spring plate and the resistance surface, and then the auxiliary nut or the sleeve nut is screwed, so that the spring plate can be received into the cavity more easily.
[0056] (2.2) Turn the main nut in the opposite direction of the tightening direction to remove it.
[0057] Of course, even if the main nut is not screwed a small amount in the tightening direction in advance, the spring plate can be received into the cavity by screwing the auxiliary nut or the sleeve nut, but a larger torque is required when screwing the auxiliary nut or the sleeve nut.
Claims
1. A detachable anti-loosening fastening assembly, characterized in that: The invention comprises a main nut and a gasket, wherein the central axis of the main nut extends along the first axial direction; the end surface of the main nut facing the gasket forms a first contact surface, and the end surface of the gasket facing the main nut forms a second contact surface, and a plurality of limiting grooves are arranged on the gasket, and the limiting grooves penetrate the second contact surface along the first axial direction; A plurality of cavities are arranged on the main nut, and the cavities penetrate the first contact surface along the first axial direction. A spring plate is arranged in each cavity, and the opposite ends of the spring plate are a fixed end and a free end, respectively. The fixed end of the spring plate is fixed on the inner wall of the cavity. The free end of the spring plate extends obliquely relative to the first plane, and the inclination direction of the free end is opposite to the screwing direction when the main nut is tightened. The first plane is perpendicular to the first axial direction. In a free state, the free end of the spring plate extends out of the cavity along the oblique direction. When an external force pushes the free end of the spring plate along the first axis direction, the spring plate can be completely accommodated in the cavity; when the external force is removed, the free end of the spring plate can extend out of the cavity; The number of limiting grooves is the same as that of cavities. When observed along the first axial direction, when the main nut is rotated, each cavity can correspond to a limiting groove, and the spring plate in the cavity can extend into the corresponding limiting groove; when the main nut is screwed along the tightening direction of the main nut, the spring plates can be accommodated in the cavities under the push of the gasket, and when the spring plates reach the projection area of the limiting groove in the first axial direction, the spring plates can be inserted into the limiting groove to avoid reversal of the main nut.
2. The detachable anti-loosening fastening assembly according to claim 1, characterized in that: A resistance surface is provided in the limiting groove, and the resistance surface extends along the first axial direction. The resistance surface faces the screwing direction when the main nut is tightened. The free end of the spring plate can press against the resistance surface to prevent the main nut from reversing.
3. The detachable anti-loosening fastening assembly according to claim 1, characterized in that: Corresponding to each cavity, an adjustment hole extending along the first axial direction is opened on the main nut, one end of the adjustment hole is connected to the corresponding cavity, and the other end of the adjustment hole passes through the end surface of the main nut facing away from the first contact surface; an adjustment screw is arranged in each adjustment hole, one end of the adjustment screw is fixed to the free end of the spring plate, and the other end of the adjustment screw extends out of the end surface of the main nut facing away from the first contact surface and is screwed with an auxiliary nut. By screwing the auxiliary nut, the spring plate can be put into the cavity, or the free end of the spring plate can be extended out of the cavity.
4. The detachable anti-loosening fastening assembly according to claim 3, characterized in that: A pad is arranged at one end of the main nut away from the first contact surface, and the adjusting screw freely passes through the pad and then is screwed with the auxiliary nut, and the auxiliary nut is pressed against the pad; A threaded section and a screwing section are provided on the outer peripheral surface of the main nut, wherein the threaded section is located on the side of the screwing section away from the first contact surface, and the screwing section is used to screw the main nut; a sleeve nut is screwed on the threaded section, and when viewed along the first axis direction, the pad at least partially covers the sleeve nut, so that when the sleeve nut is screwed in the direction away from the first contact surface, the pad can be pushed to move in the direction away from the first contact surface; screwing the sleeve nut can make the pad move back and forth along the first axis direction, and drive the adjusting screw to move back and forth along the first axis direction.
5. The detachable anti-loosening fastening assembly according to claim 3 or 4, characterized in that: The adjusting screw is connected to the spring plate via a universal joint.
6. The detachable anti-loosening fastening assembly according to claim 5, characterized in that: In the first axial direction, the height of the spring plate extending out of the cavity is 2-3 mm. When the spring plate freely extends out of the cavity, the adjusting screw is coaxially arranged with the adjusting hole, and the inner diameter of the adjusting hole is 4-5 mm larger than the outer diameter of the adjusting screw.
7. The detachable anti-loosening fastening assembly according to claim 1, characterized in that: The bottom surface of the limiting groove is an inclined surface, and the bottom surface extends obliquely in a direction away from the second contact surface in the opposite direction to the screwing direction when the main nut is tightened.
8. A method for using the detachable anti-loosening fastening assembly according to any one of claims 1 to 7, characterized in that: The method of use includes a tightening step and a disassembly step of the main nut, and the tightening step includes the following sub-steps: (1.1) The bolt is passed through the first component and the second component in sequence, and then the gasket is sleeved on the bolt, and then the main nut is screwed on the bolt, and the gasket is located between the second component and the main nut; the limiting groove of the gasket faces the main nut, and the cavity of the main nut faces the gasket; (1.2) Tighten the main nut in the tightening direction until the tightening torque of the main nut reaches the set torque range and each spring plate is inserted into a limit groove, thus completing the tightening of the main nut; The disassembly step includes the following sub-steps: (2.1) The auxiliary nut is screwed in a direction away from the gasket to move the adjusting screw in a direction away from the gasket, and the spring plate is received in the cavity; or the sleeve nut is screwed in a direction away from the gasket to move the backing plate in a direction away from the gasket, and the spring plate is received in the cavity; (2.2) Turn the main nut in the opposite direction of the tightening direction to remove it.
9. The method of use according to claim 8, characterized in that: In sub-step (2.1), firstly, the main nut is screwed in the tightening direction to move the spring plate in the circumferential direction by 0.1-0.2 mm, and then the auxiliary nut or sleeve nut is screwed to accommodate the spring plate in the cavity.