Self-tightening type anti-loosening thread fastening kit

Abstract

The invention discloses a self-tightening type anti-loosening thread fastening kit which comprises a bolt, a nut and an elastic gasket. A clamping structure is arranged on the end face of the nut. The gasket is formed by punching a plate, a plurality of radial slots are formed in the circumferential surface of the gasket, circumferential slots are formed in at least one of the bottoms of the radial slots, the radial slots and strip-shaped parts separated by the circumferential slots on the corresponding sides form warped pieces, the warped pieces on the corresponding sides are obliquely turned up towards the same surface of the gasket, and the warped pieces on the corresponding sides are rotationally and symmetrically distributed; the bolt is a second bolt free of slotting. The clamping structure is at least one spiral gentle slope surface which is arranged on at least one end surface of the nut and is close to the peripheral edge part; the inner ring surface of the gasket is a complete circular inner ring surface; when the nut is unscrewed, the outer end of at least one warped piece relatively displaces towards the slope top direction of the corresponding gentle slope surface; a limiting protruding ring is arranged on the end face of the nut close to the middle shaft part. The reliability is higher, and the production cost is lower.

Description

Technical Field

[0001] The invention belongs to the technical field of standard parts and relates to a self-tightening anti-loosening thread fastening kit. Background Art

[0002] Threaded fastening kits are the main category of standard parts and are widely used in various fields. Standardized threaded fastening kits have many series of products, usually including matching bolts, nuts, and washers.

[0003] The threaded fastening kit using this technology can be used normally in various conventional applications, but it is not suitable for occasions such as high vibration and frequent vibration and high reliability requirements such as train tracks. Specially designed anti-loosening threaded fastening kits must be used. Due to the large amount and high requirements, whether it can be used under the premise of meeting the rigid technical requirements of anti-loosening must also consider the manufacturing cost, installation and maintenance cost and reliability.

[0004] For example, the technical solution disclosed in the Chinese patent application numbered 202421958985.4, entitled “An anti-loosening thread fastening kit that is easy to mass-produce”, has a structure such as Figure 1 , Figure 2 , Figure 3 As shown, it includes a bolt 3A, a nut 1A, and an elastic gasket; a positioning groove 6 is opened axially on the bolt 3A; a plurality of anti-slip teeth 2 with rotational symmetry are densely distributed on at least one end face of the nut 1A; a positioning block 4 matched with the positioning groove 6 is provided on the inner ring of the elastic gasket, and the elastic gasket is a circular annular special-shaped gasket A 5A, and the circumferential surface of the gasket A 5A is opened along the radial direction of the gasket with at least one radial slit J whose length is less than the ring width of the gasket A 5A, and a circumferential slit Z is opened along one side of the circumference of the gasket from the bottom of the radial slit J as the starting point, and the strip portion separated by the L-shaped slit formed by the radial slit J and the circumferential slit Z constitutes an elastic flap K, and the elastic flap K is tilted up at an acute angle toward the same surface of the gasket A 5A; the gasket A 5A is formed by one-time stamping of a plate of equal thickness.

[0005] The anti-loosening thread fastening kit using such technology can certainly achieve the technical purpose of anti-loosening and easy batch production, but it has the following shortcomings:

[0006] A, because its anti-loosening principle is to prevent the angular displacement between the A gasket 5A and the bolt 3A by cooperating the positioning groove 6 on the bolt 3A with the positioning block 4 on the A gasket 5A, and then clamp the anti-slip teeth 2 on the bottom surface of the nut 1A through the elastic lift K on the A gasket 5A, thereby preventing the angular displacement between the nut 1A and the bolt 3A. Once the original clamping position between the elastic lift K and the anti-slip teeth 2 is loosened, the loosening will be further aggravated. Since there is no self-tightening function, the nut 1A and the bolt 3A will also be further loosened, and the reliability is not high enough;

[0007] B. Since the positioning groove 6 needs to be provided on the bolt 3A, in addition to the increase in production cost, the mechanical strength of the bolt 3A will also be affected to a certain extent, and it will be relatively difficult to replace and promote, and the reliability will also be affected to a certain extent;

[0008] In summary, the reliability of the existing technology is not high enough, the production cost is relatively high, and the use effect is not ideal enough. Summary of the invention

[0009] In order to overcome the deficiencies of the prior art, the present invention provides a self-tightening anti-loosening threaded fastening kit with higher reliability and lower production cost.

[0010] The technical solution adopted by the present invention to achieve the above technical purpose is: a self-tightening anti-loosening threaded fastening kit, including a bolt, a nut, and an elastic gasket; a clamping structure is provided on at least one end surface of the nut; the elastic gasket is a circular annular special-shaped gasket stamped by a plate of equal thickness, and a plurality of radial slits with a slit length less than the width of the gasket ring portion are provided on the circumferential surface of the gasket along the radial direction of the gasket, and a circumferential slit is provided along at least one side of the circumference of the gasket with the slit bottom of the radial slit as the starting point, and the corresponding L-shaped slits formed by the radial slits and the circumferential slits on the corresponding side separate the corresponding strips on the gasket body. The shaped portion constitutes a warping piece on the corresponding side, and the warping piece on the corresponding side is tilted up at an acute angle toward the same surface of the gasket, and the warping piece on the corresponding side is rotationally symmetrically distributed with the center of the gasket as the axis; the bolt is a Type B bolt with an axial slot-free rod body; the clamping structure is that at least one end face of the nut is provided with at least one spiral gentle slope surface near the outer peripheral edge; the inner ring surface of the gasket is a complete circular inner ring surface; when the nut is loosened, the outer end of at least one warping piece is relatively displaced toward the top of the corresponding gentle slope surface and is further pressed down by the gentle slope surface; the end face of the nut close to the central axis is provided with a limiting convex ring higher than all slope surfaces.

[0011] The nut is a B nut, and a plurality of gentle slopes are rotationally symmetrically arranged near the outer peripheral edge on at least one end face of the B nut, and the terminal slope top of each gentle slope and the starting slope bottom of the adjacent gentle slope are integrally connected head to tail through a transition steep slope.

[0012] The nut is a C-nut, and at least one end face of the C-nut is provided with a twisted circular gentle slope surface near the outer peripheral edge. The slope of the circular gentle slope surface is half-circle rising and half-circle falling and is closed at the head and tail.

[0013] The gasket is a Type B gasket, and a plurality of radial slits having a slit length less than the width of the gasket ring portion are provided on the circumferential surface of the Type B gasket along the radial direction of the gasket. A circumferential slit is provided along one side of the circumference of the gasket with the bottom of the radial slit as the starting point. The corresponding L-shaped slits formed by the radial slits and the circumferential slits separate the corresponding strip portions on the gasket body to form elastic flaps. The elastic flaps are obliquely flipped up at an acute angle toward the same surface of the gasket, and the elastic flaps are rotationally symmetrically distributed around the center of the gasket as the axis.

[0014] The gasket is gasket C, and a plurality of radial slits with a slit length less than the width of the gasket ring portion are provided on the circumferential surface of gasket C along the radial direction of the gasket. Circumferential slits are provided on both sides of the circumference of the gasket starting from the bottom of the radial slits, one side is circumferential slit A, and the other side is circumferential slit B; the strip portion separated by the L-shaped slit formed by the radial slit and the circumferential slit A on the gasket body constitutes elastic lift piece A; the strip portion separated by the L-shaped slit formed by the radial slit and the circumferential slit B on the gasket body constitutes elastic lift piece B; elastic lift piece A is tilted up at an acute angle toward one side of the gasket; elastic lift piece B is tilted up at an acute angle toward the other side of the gasket; the lift pieces on the corresponding sides are rotationally symmetrically distributed around the center of the gasket as the axis.

[0015] The beneficial effects of the present invention are as follows: due to the adoption of the above technical scheme, the structure has a self-powered feedback mechanism for increasing friction to prevent further loosening, thereby achieving self-tightening anti-loosening, and the reliability of anti-loosening is higher; since there is no need to provide a positioning groove 6 on the bolt 3A, the reliability in strength is relatively higher, the production cost is relatively lower, and the use effect is more ideal. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 is a schematic diagram of a prior art anti-loosening thread fastening kit;

[0018] Figure 2 It is a schematic diagram of the A gasket 5A part in the prior art;

[0019] Figure 3 is a schematic diagram of another viewing direction of the gasket 5A in the prior art;

[0020] Figure 4 is a schematic diagram of the present invention;

[0021] Figure 5It is a schematic diagram of the second nut 1B part of the present invention;

[0022] Figure 6 It is a schematic diagram of the C gasket 5C portion of the present invention;

[0023] Figure 7 It is an omitted schematic diagram of the present invention;

[0024] Figure 8 It is a schematic diagram of the C nut 1C part of the present invention;

[0025] Fig. 9 It is a schematic diagram of the portion of the second gasket 5B in the present invention;

[0026] Fig.10 is a schematic diagram of another viewing direction of the C gasket 5C portion of the present invention;

[0027] Fig.11 It is the cover of the performance test report of the physical sample of the present invention;

[0028] Fig.12 It is the first page of the performance test report of the physical sample of the present invention;

[0029] Fig.13 It is page 2 of the performance test report of the physical sample of the present invention;

[0030] Fig.14 It is page 3 of the performance test report of the physical sample of the present invention.

[0031] The marking numbers in the accompanying drawings are explained as follows: nut A 1A, nut B 1B, nut C 1C, anti-slip teeth 2, bolt A 3A, bolt B 3B, positioning block 4, gasket A 5A, gasket B 5B, gasket C 5C, positioning groove 6, limiting convex ring 7, elastic lift K, elastic lift K1 of A, elastic lift K2 of B, radial slit J, circumferential slit Z, circumferential slit A Z1, circumferential slit B Z2, gentle slope surface P, steep slope surface T DETAILED DESCRIPTION

[0032] The first embodiment of the present invention is as follows Figure 4 , Figure 5 , Figure 7 , Fig. 9As shown, a self-tightening anti-loosening threaded fastening kit comprises a bolt, a nut and an elastic gasket; a clamping structure is provided on at least one end face of the nut; the elastic gasket is a circular annular special-shaped gasket formed by stamping a plate of equal thickness, a plurality of radial slits J with a slit length less than the width of the gasket ring portion are provided on the circumferential surface of the gasket along the radial direction of the gasket, a circumferential slit Z is provided along at least one side of the circumference of the gasket with the slit bottom of the radial slit J as the starting point, and a corresponding L-shaped slit formed by the radial slit J and the circumferential slit Z on the corresponding side separates a corresponding strip-shaped portion on the gasket body to form a warping piece on the corresponding side. The corresponding side of the lift piece is tilted up at an acute angle toward the same surface of the gasket, and the corresponding side of the lift piece is rotationally symmetrically distributed with the center of the gasket as the axis; the bolt is a Type B bolt 3B with no slots in the axial direction of the shaft; the clamping structure is that at least one end face of the nut is provided with at least one spiral gentle slope surface P near the outer peripheral edge; the inner ring surface of the gasket is a complete circular inner ring surface; when the nut is loosened, the outer end of at least one lift piece is relatively displaced toward the top of the corresponding gentle slope surface P and is further pressed down by the gentle slope surface P; the end face of the nut close to the middle axis is provided with a limiting convex ring 7 higher than all slopes.

[0033] The nut is a Type B nut 1B, and a plurality of gentle slopes P are rotationally symmetrically arranged near the outer peripheral edge on at least one end face of the Type B nut 1B. The terminal top of each gentle slope P is integrally connected to the starting bottom of an adjacent gentle slope P via a transition steep slope T.

[0034] The gasket is gasket B 5B, and a plurality of radial slits J with a slit length less than the width of the gasket ring portion are opened on the circumferential surface of gasket B along the radial direction of the gasket. A circumferential slit Z is opened along one side of the circumference of the gasket with the slit bottom of the radial slit J as the starting point. The corresponding L-shaped slits formed by the radial slits J and the circumferential slits Z separate the corresponding strip portions on the gasket body to form elastic flaps K. The elastic flaps K are tilted up at an acute angle toward the same surface of the gasket, and the elastic flaps K are rotationally symmetrically distributed around the center of the gasket as the axis.

[0035] The second embodiment of the present invention is as follows Figure 5 , Figure 6 , Fig.10 And refer to Figure 4 , Figure 7As shown, a self-tightening anti-loosening threaded fastening kit comprises a bolt, a nut and an elastic gasket; a clamping structure is provided on at least one end face of the nut; the elastic gasket is a circular annular special-shaped gasket formed by stamping a plate of equal thickness, a plurality of radial slits J with a slit length less than the width of the gasket ring portion are provided on the circumferential surface of the gasket along the radial direction of the gasket, a circumferential slit Z is provided along at least one side of the circumference of the gasket with the slit bottom of the radial slit J as the starting point, and a corresponding L-shaped slit formed by the radial slit J and the circumferential slit Z on the corresponding side separates a corresponding strip-shaped portion on the gasket body to form a warping piece on the corresponding side. The corresponding side of the lift piece is tilted up at an acute angle toward the same surface of the gasket, and the corresponding side of the lift piece is rotationally symmetrically distributed with the center of the gasket as the axis; the bolt is a Type B bolt 3B with no slots in the axial direction of the shaft; the clamping structure is that at least one end face of the nut is provided with at least one spiral gentle slope surface P near the outer peripheral edge; the inner ring surface of the gasket is a complete circular inner ring surface; when the nut is loosened, the outer end of at least one lift piece is relatively displaced toward the top of the corresponding gentle slope surface P and is further pressed down by the gentle slope surface P; the end face of the nut close to the middle axis is provided with a limiting convex ring 7 higher than all slopes.

[0036] The nut is a Type B nut 1B, and a plurality of gentle slopes P are rotationally symmetrically arranged near the outer peripheral edge on at least one end face of the Type B nut 1B. The terminal top of each gentle slope P is integrally connected to the starting bottom of an adjacent gentle slope P via a transition steep slope T.

[0037] The gasket is gasket C 5C, and a plurality of radial slits J with a slit length less than the width of the gasket ring portion are provided on the circumferential surface of gasket C along the radial direction of the gasket. Circumferential slits Z are provided on both sides of the circumference of the gasket starting from the bottom of the radial slit J, one of which is circumferential slit A Z1 and the other is circumferential slit B Z2; the strip portion separated by the L-shaped slit formed by the radial slit J and the circumferential slit A Z1 on the gasket body constitutes elastic lift piece A K1; the strip portion separated by the L-shaped slit formed by the radial slit J and the circumferential slit B Z2 on the gasket body constitutes elastic lift piece B K2; the elastic lift piece A K1 is tilted up at an acute angle toward one side of the gasket; the elastic lift piece B K2 is tilted up at an acute angle toward the other side of the gasket; the lift pieces on the corresponding sides are rotationally symmetrically distributed with the center of the gasket as the axis.

[0038] The third embodiment of the present invention is as follows Figure 8 , Fig. 9As shown, a self-tightening anti-loosening threaded fastening kit comprises a bolt, a nut and an elastic gasket; a clamping structure is provided on at least one end face of the nut; the elastic gasket is a circular annular special-shaped gasket formed by stamping a plate of equal thickness, a plurality of radial slits J with a slit length less than the width of the gasket ring portion are provided on the circumferential surface of the gasket along the radial direction of the gasket, a circumferential slit Z is provided along at least one side of the circumference of the gasket with the slit bottom of the radial slit J as the starting point, and a corresponding L-shaped slit formed by the radial slit J and the circumferential slit Z on the corresponding side separates a corresponding strip-shaped portion on the gasket body to form a warping piece on the corresponding side. The corresponding side of the lift piece is tilted up at an acute angle toward the same surface of the gasket, and the corresponding side of the lift piece is rotationally symmetrically distributed with the center of the gasket as the axis; the bolt is a Type B bolt 3B with no slots in the axial direction of the shaft; the clamping structure is that at least one end face of the nut is provided with at least one spiral gentle slope surface P near the outer peripheral edge; the inner ring surface of the gasket is a complete circular inner ring surface; when the nut is loosened, the outer end of at least one lift piece is relatively displaced toward the top of the corresponding gentle slope surface P and is further pressed down by the gentle slope surface P; the end face of the nut close to the middle axis is provided with a limiting convex ring 7 higher than all slopes.

[0039] The nut is a propane nut 1C, and a twisted circular gentle slope surface P is provided near the outer peripheral edge on at least one end face of the propane nut 1C. The slope of the circular gentle slope surface P is half-circle rising and half-circle falling and is closed at the head and tail.

[0040] The gasket is gasket B 5B, and a plurality of radial slits J with a slit length less than the width of the gasket ring portion are opened on the circumferential surface of gasket B along the radial direction of the gasket. A circumferential slit Z is opened along one side of the circumference of the gasket with the slit bottom of the radial slit J as the starting point. The corresponding L-shaped slits formed by the radial slits J and the circumferential slits Z separate the corresponding strip portions on the gasket body to form elastic flaps K. The elastic flaps K are tilted up at an acute angle toward the same surface of the gasket, and the elastic flaps K are rotationally symmetrically distributed around the center of the gasket as the axis.

[0041] The fourth embodiment of the present invention is as follows Figure 6 , Figure 8 , Fig.10As shown, a self-tightening anti-loosening threaded fastening kit comprises a bolt, a nut and an elastic gasket; a clamping structure is provided on at least one end face of the nut; the elastic gasket is a circular annular special-shaped gasket formed by stamping a plate of equal thickness, a plurality of radial slits J with a slit length less than the width of the gasket ring portion are provided on the circumferential surface of the gasket along the radial direction of the gasket, a circumferential slit Z is provided along at least one side of the circumference of the gasket with the slit bottom of the radial slit J as the starting point, and a corresponding L-shaped slit formed by the radial slit J and the circumferential slit Z on the corresponding side separates a corresponding strip-shaped portion on the gasket body to form a warping piece on the corresponding side. The corresponding side of the lift piece is tilted up at an acute angle toward the same surface of the gasket, and the corresponding side of the lift piece is rotationally symmetrically distributed with the center of the gasket as the axis; the bolt is a Type B bolt 3B with no slots in the axial direction of the shaft; the clamping structure is that at least one end face of the nut is provided with at least one spiral gentle slope surface P near the outer peripheral edge; the inner ring surface of the gasket is a complete circular inner ring surface; when the nut is loosened, the outer end of at least one lift piece is relatively displaced toward the top of the corresponding gentle slope surface P and is further pressed down by the gentle slope surface P; the end face of the nut close to the middle axis is provided with a limiting convex ring 7 higher than all slopes.

[0042] The nut is a propane nut 1C, and a twisted circular gentle slope surface P is provided near the outer peripheral edge on at least one end face of the propane nut 1C. The slope of the circular gentle slope surface P is half-circle rising and half-circle falling and is closed at the head and tail.

[0043] The gasket is gasket C 5C, and a plurality of radial slits J with a slit length less than the width of the gasket ring portion are provided on the circumferential surface of gasket C along the radial direction of the gasket. Circumferential slits Z are provided on both sides of the circumference of the gasket starting from the bottom of the radial slit J, one of which is circumferential slit A Z1 and the other is circumferential slit B Z2; the strip portion separated by the L-shaped slit formed by the radial slit J and the circumferential slit A Z1 on the gasket body constitutes elastic lift piece A K1; the strip portion separated by the L-shaped slit formed by the radial slit J and the circumferential slit B Z2 on the gasket body constitutes elastic lift piece B K2; the elastic lift piece A K1 is tilted up at an acute angle toward one side of the gasket; the elastic lift piece B K2 is tilted up at an acute angle toward the other side of the gasket; the lift pieces on the corresponding sides are rotationally symmetrically distributed with the center of the gasket as the axis.

[0044] Further description of the present invention:

[0045] A. The working principle of the self-tightening anti-loosening device is as follows: when the present invention is applied, the entire bottom surface of the gasket is crimped with the plane of the corresponding hole position of a device. Although the middle part of the top surface of the gasket is pressed by the limiting convex ring 7 on the bottom surface of the nut, the elastic flap K area of ​​the outer ring of the top surface of the gasket is only elastically crimped with the gentle slope surface P on the bottom surface of the nut. Therefore, the crimping area of ​​the bottom surface of the gasket is larger and the friction force is also greater. When loosening occurs, the nut and the gasket will loosen first, so the gasket will not loosen with the nut at this time. When the nut starts to loosen slightly, at least one elastic flap K (or elastic flap K1 of Class A or elastic flap K2 of Class B) will be further pressed along the corresponding gentle slope surface P. The increase in elastic force will automatically increase the friction between the nut and the gasket, preventing the nut from loosening further. There is a self-powered feedback mechanism that increases friction and prevents further loosening, thereby achieving self-tightening anti-loosening. However, once the initial engagement between the elastic lifter K and the anti-slip teeth 2 begins to loosen, the traditional anti-loosening structure will collapse.

[0046] B. The purpose of setting the limiting convex ring 7 is to prevent the elastic lifter from losing its elasticity due to being pressed too tightly by the nut for a long time, causing the feedback mechanism to fail, and to limit the crimping distance between the nut and the elastic lifter on the gasket.

[0047] C. The purpose of the general embodiment of arranging nuts and washers on both sides is: it is a similar "fool-proof design" when manually operated, and when used in an automatic installation mechanism, it can simplify the positioning unit mechanism of the automatic installation mechanism.

[0048] D. The samples of the present invention have been tested by the national authoritative testing department, and have been tested with requirements higher than the relevant standards. After adding butter, they still meet the requirements. Figures 11 to 14 Assay results shown for Residual / Initial = 98.9%.

[0049] E, the two embodiments using the Type B nut 1B are suitable for application scenarios with higher requirements; the two embodiments using the Type C nut 1C are suitable for application scenarios with relatively low requirements.

[0050] F, the "terminal slope top of each gentle slope surface P and the starting slope bottom of the adjacent gentle slope surface P are integrally connected head to tail through a transition steep slope surface T" can be a direct butt joint of adjacent slope ends, or a transition butt joint by inserting a moderately curved surface.

[0051] G. Since the present invention does not make any structural changes to the bolts, the present invention is easier to replace and promote.

[0052] H. The present invention can make full use of the traditional production line for production. In the production of nuts, the mold needs to be changed accordingly because the non-standard clamping structure on the nuts needs to be punched out at the same time. The rest of the process is the same as the production process of traditional nut parts. The production of gaskets uses steel coils as raw materials and can be continuously produced on traditional stamping production lines. When designing the mold, a combined mold can be used to form the punching and bending shapes at one time. The produced bolts, nuts and gaskets can be heat-treated in batches.

Claims

1. A self-tightening anti-loosening threaded fastening kit, comprising a bolt, a nut, and an elastic gasket; a clamping structure is provided on at least one end surface of the nut; the elastic gasket is a circular annular special-shaped gasket formed by stamping a plate of equal thickness, a plurality of radial slits with a slit length less than the width of the gasket ring portion are provided on the circumferential surface of the gasket along the radial direction of the gasket, a circumferential slit is provided along at least one side of the circumference of the gasket with the slit bottom of the radial slit as the starting point, the radial slit and the circumferential slit on the corresponding side constitute the corresponding strip-shaped portion separated on the gasket body by the corresponding L-shaped slit, the corresponding side The flap on the corresponding side is tilted up at an acute angle toward the same side of the gasket, and the flap on the corresponding side is rotationally symmetrically distributed with the gasket center as the axis; it is characterized in that: The bolt is a Type B bolt without slotting in the axial direction of the rod; the clamping structure is that at least one end face of the nut is provided with at least one spiral gentle slope surface near the outer peripheral edge; the inner ring surface of the gasket is a complete circular inner ring surface; when the nut is loosened, the outer end of at least one flap is relatively displaced toward the top of the corresponding gentle slope surface and is further pressed down by the gentle slope surface; the end face of the nut close to the central axis is provided with a limiting convex ring higher than all slope surfaces.

2. The self-tightening anti-loosening thread fastening kit according to claim 1, characterized in that: The nut is a B nut, and a plurality of gentle slopes are rotationally symmetrically arranged near the outer peripheral edge on at least one end face of the B nut, and the terminal slope top of each gentle slope and the starting slope bottom of the adjacent gentle slope are integrally connected head to tail through a transition steep slope.

3. The self-tightening anti-loosening thread fastening kit according to claim 1, characterized in that: The nut is a C-nut, and at least one end face of the C-nut is provided with a twisted circular gentle slope surface near the outer peripheral edge. The slope of the circular gentle slope surface is half-circle rising and half-circle falling and is closed at the head and tail.

4. A self-tightening anti-loosening threaded fastening kit according to claim 1, 2 or 3, characterized in that: The gasket is a Type B gasket, and a plurality of radial slits having a slit length less than the width of the gasket ring portion are provided on the circumferential surface of the Type B gasket along the radial direction of the gasket. A circumferential slit is provided along one side of the circumference of the gasket with the bottom of the radial slit as the starting point. The corresponding L-shaped slits formed by the radial slits and the circumferential slits separate the corresponding strip portions on the gasket body to form elastic flaps. The elastic flaps are obliquely flipped up at an acute angle toward the same surface of the gasket, and the elastic flaps are rotationally symmetrically distributed around the center of the gasket as the axis.

5. A self-tightening anti-loosening thread fastening kit according to claim 1, 2 or 3, characterized in that: The gasket is gasket C, and a plurality of radial slits with a slit length less than the width of the gasket ring portion are provided on the circumferential surface of gasket C along the radial direction of the gasket. Circumferential slits are provided on both sides of the circumference of the gasket starting from the bottom of the radial slits, one side is circumferential slit A, and the other side is circumferential slit B; the strip portion separated by the L-shaped slit formed by the radial slit and the circumferential slit A on the gasket body constitutes elastic lift piece A; the strip portion separated by the L-shaped slit formed by the radial slit and the circumferential slit B on the gasket body constitutes elastic lift piece B; elastic lift piece A is tilted up at an acute angle toward one side of the gasket; elastic lift piece B is tilted up at an acute angle toward the other side of the gasket; the lift pieces on the corresponding sides are rotationally symmetrically distributed around the center of the gasket as the axis.

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