Anti-loose and anti-theft fastening assembly, through hole in fastened piece, gasket, clamping and wrapping bolt and tooth groove bolt

Abstract

An anti-loose and anti-theft fastening assembly comprises a through hole in a fastened piece, a gasket, a clamping and wrapping bolt and a tooth groove bolt and comprises a bolt, a nut, the gasket and the through hole in the fastened piece. A through hole in the fastened piece is a non-circular through hole, clamping strips and clamping teeth of different structures are arranged on the two faces of the gasket respectively, a clamping bag or a tooth groove is formed in a nut of the bolt, a tooth groove is formed in the nut, and a double-end self-clamping type or single-end self-clamping type anti-loosening and anti-theft fastening assembly is jointly formed. The anti-loosening and anti-theft bolt has the advantages that the non-circular through hole structure is combined with the double-face latch structure of the gasket and the clamping bag and tooth groove structure of the bolt and the nut, fastening assemblies can be well clamped, the anti-loosening and anti-theft effect can be achieved only through small clamping force, and then the situation that the screw is broken due to long-term fastening vibration is avoided.

Description

Technical Field

[0001] This invention relates to the field of anti-loosening fastener technology, and in particular to an anti-loosening and anti-theft fastening assembly and related components. Background Technology

[0002] Commonly used fastening components include bolt and nut assemblies, stud and nut assemblies, screws, studs, etc. Among them, the nut is a polygonal cylinder with a central threaded hole. The inner ring wall of the central threaded hole has internal threads, which are engaged with the external threads on the stud to tighten it. The stud is a screw rod with a bolt head and external threads, used to fasten and connect two or more fasteners with through holes.

[0003] Once the nut is tightened onto the bolt, the tightness of the nut and bolt is generally quite stable. However, if the fastener is subjected to vibration for a long time, it will cause a difference in vibration frequency between the connecting parts. This will cause the connecting parts in the connection structure to have a tendency to loosen in opposite directions, resulting in the connection between the nut and the bolt becoming loose or even falling off.

[0004] For example, fasteners installed on equipment that frequently vibrates, such as wind power equipment, truck axles, mining equipment, and lathes, will not meet the anti-loosening requirements if the torque is too small, resulting in low thread friction between the nut and the screw. However, if the torque applied between the nut and the screw is too large, exceeding 50% of the screw's bearing capacity, the screw at the nut end is prone to breakage under frequent vibration. After long-term use on power or communication towers, steel bridges, and steel factory buildings, nuts often loosen or even fall off automatically. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a fastening component that eliminates the need to tighten the nut too much, making the screw less prone to breakage and preventing loosening, in order to address the above-mentioned defects.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is an anti-loosening and anti-theft fastening component and its related parts, including bolts, nuts, washers and through holes on the fastener; that is, the fastener is fastened at both ends by the nut and bolt on the bolt.

[0007] The inner ring wall of the through hole on the fastener is provided with a groove or recess. The through hole refers to a through hole without internal threads on the inner ring wall. The groove refers to a groove that runs through the entire through hole and is parallel to the axis of the through hole. The recess refers to a shallow, short, non-through groove on the inner ring wall at the outlet of the through hole. A through hole with a groove or recess is called a non-circular through hole, that is, a non-circular through hole refers to any one of an elliptical through hole, an irregular circular through hole, or a circular through hole with a groove or recess on the inner ring wall. One or more grooves or recesses can be provided in the same through hole. There are at least two fasteners. The recess is actually the groove at the edge of the groove. The structure embedded in the recess can be embedded in the edge of the groove. For the sake of brevity, the following description of embedding in the recess or matching the recess is equivalent to embedding in the edge of the groove or matching the edge of the groove. However, embedding in the groove does not necessarily mean embedding in the recess, because the recess is a blind groove similar to a blind hole, and the groove is a through groove similar to a through hole.

[0008] The bolt includes a threaded rod and a nut fixed to one end of the threaded rod. A retaining clip is provided on the threaded rod end where the nut connects to the threaded rod. One side of the retaining clip is directly formed on the end face of the nut, and the other side is directly formed on the threaded rod end. The retaining clip is used to embed into the edge of a groove or channel on the inner ring wall of the non-through hole of the fastener. Specifically, the threaded rod end where the nut connects to the threaded rod has a retaining clip that matches the groove on the inner ring wall of the non-through hole. One or more retaining clips can be provided, and their number and orientation are the same as the number and orientation of the grooves or channels in the through hole. The retaining clip bolt is used to match anti-loosening and anti-theft fastening components and related parts.

[0009] The contact surface between the gasket and the fastener is called the lower surface. A retaining strip is provided on the lower surface of the gasket. The retaining strip matches the groove in the non-circular through hole, so that the retaining strip can be embedded in the groove and the gasket cannot rotate. That is, the retaining strip matches the non-circular part in the non-circular through hole, so that the retaining strip can be stably inserted into the non-circular position in the non-circular through hole. One retaining strip can be provided, or several retaining strips can be provided.

[0010] The upper surface of the washer is provided with retaining teeth to prevent the nut from loosening. The surface of the retaining teeth includes an inclined tooth surface and a vertical tooth surface that are directly connected by a bend. The vertical tooth surface is perpendicular to the upper surface of the washer, and the inclined tooth surface is inclined to the upper surface of the washer. The inclination direction of the inclined tooth surface is opposite to the tightening direction of the nut's internal thread. That is, the protruding and supporting direction of the retaining teeth abuts against the loosening direction of the nut's internal thread, making the nut unable to be loosened and only tightened. In the initial state without spring pressure, the inclination angle of the inclined tooth surface relative to the upper surface of the washer is greater than 0° and less than 45°, preferably 1°-30°, and most preferably 5°. That is, the preferred angle between the inclined tooth surface and the upper surface of the washer is 1°-30°. °; The locking teeth can be elastic locking teeth or non-elastic locking teeth. The elastic locking teeth are formed by cutting a section of the gasket and bending it upward to form an elastic locking tooth that can be compressed back after extending out onto the upper surface of the gasket. The non-elastic locking teeth are directly generated or welded onto the upper surface of the gasket. The number of locking teeth can be one or several. When several are set, the locking teeth are evenly distributed radially on the upper surface of the gasket. The vertical tooth surface can also be slightly inclined inward, that is, the angle between the tooth surface named vertical tooth surface and the upper surface of the gasket is 90°-60°. In this way, after it is engaged with the tooth groove on the matching nut, the nut will be even more difficult to loosen.

[0011] Several grooves are directly formed on one end face of the nut, and these grooves are evenly distributed radially on the end face of the nut. The groove walls include vertical groove walls and inclined groove walls that are directly connected by a bend. The vertical groove wall is perpendicular to the end face of the nut, and the inclined groove wall is inclined to the end face of the nut. The inclination direction of the inclined groove wall is the same as the tightening direction of the internal thread of the nut. That is, the grooves press the retaining teeth on the washer together along the tightening direction of the internal thread of the nut, and then make the vertical tooth surface of the retaining teeth fit together with the vertical groove wall of the groove, so that the nut cannot be loosened and can only be tightened. The inclination angle of the inclined groove wall is greater than 0° and less than 45°, preferably 1°-30°, and most preferably 5°, that is, the angle between the inclined groove wall and the end face of the nut is preferably 1°-30°. The vertical groove wall can also be slightly inclined inward, that is, the angle between the surface of the vertical groove wall and the end face of the nut is 90°-60°. In this way, after engaging with the retaining teeth on the matching washer, the nut is even more difficult to loosen.

[0012] The case where the vertical groove wall of the toothed fastener is made absolutely perpendicular allows for tightening but not unscrewing. This prevents the nut from loosening and provides theft prevention, but prevents it from being unscrewed for equipment maintenance. To allow the fastener to both tighten and unscrew, the vertical tooth surface on the washer and / or the vertical groove wall on the nut can be slightly tilted, allowing the nut to be loosened and removed under greater torque. Specifically, the vertical tooth surface of the washer's locking teeth is tilted 1°-15° in the direction of nut loosening, preferably 5°, meaning the angle between the surface of the vertical tooth surface and the upper surface of the washer is 91°. The angle is 91°-105°, preferably 95°; and / or the vertical groove wall on the nut is inclined at 1°-15°, preferably 5°, in the direction of loosening the nut, that is, the angle between the surface of the vertical groove wall and the end face of the nut is 91°-105°, preferably 95°; and / or the vertical groove wall on the nut of the bolt is inclined at 1°-15°, preferably 5°, in the direction of loosening the bolt, that is, the angle between the surface of the vertical groove wall and the inner end face of the nut of the bolt is 91°-105°, preferably 95°.

[0013] A single-head self-locking anti-loosening and anti-theft fastening assembly includes a bolt, a washer, and a through hole on the fastener; that is, the fastener is fastened at one end by a nut on the bolt, and there is no nut.

[0014] There are two types: one is a grooved single-head self-locking anti-loosening and anti-theft fastening component, and the other is a grooved single-head self-locking anti-loosening and anti-theft fastening component.

[0015] The grooved single-head self-locking anti-loosening and anti-theft fastening assembly includes a bolt, a washer, and a through hole on the fastener. The fastener includes an upper fastener and a lower fastener. The fastener that contacts the nut on the bolt is called the upper fastener, and the bottommost fastener is called the lower fastener. In actual applications, there may be another fastener between the lower and upper fasteners, all of which are provided with through holes as usual. The upper fastener has a through hole, which refers to a through hole without internal threads on the inner ring wall. This through hole is a non-circular through hole, which is a circular hole with a groove on the inner ring wall. The groove is only provided at the outlet of the inner ring wall. The non-circular part of the non-circular through hole is called the groove. It is any one of the following: an elliptical through hole, an irregular circular through hole, or a circular through hole with a groove on its inner ring wall; the groove can be a non-circular part of an elliptical through hole, a non-circular part of an irregular circular through hole, or a groove in a circular through hole with a groove on its inner ring wall; that is, the groove is a groove on the inner ring wall of the through hole, or an irregular part other than the circular through hole in an irregular circular through hole, or a curved tooth-shaped part other than the circular through hole in an elliptical through hole; multiple grooves can also be provided at the outlet of the inner ring wall; the lower fastener is provided with a screw hole, the screw hole refers to a through hole or blind hole with internal threads on the inner ring wall, and the outlet of the inner ring wall of the screw hole is not provided with a groove; that is, in this case, only the outlet of the through hole of the uppermost fastener is provided with a groove.

[0016] The bolt includes a screw and a nut fixed to one end of the screw. Several grooves are directly formed on the inner end face of the nut, and these grooves are radially and evenly distributed on the inner end face of the nut. The groove walls include a vertical groove wall and an inclined groove wall that are directly connected by a bend. The vertical groove wall is perpendicular to the inner end face of the nut, and the inclined groove wall is inclined to the inner end face of the nut. The inclination direction of the inclined groove wall is the same as the tightening direction of the external thread of the screw on the bolt. That is, the grooves, along the tightening direction of the external thread of the screw, hold the washer... The locking teeth are pressed together, and then the vertical tooth surface of the locking teeth is made to fit against the vertical groove wall of the tooth groove, so that the nut cannot be loosened and can only be tightened; the inclination angle of the inclined groove wall is greater than 0° and less than 45°, preferably 1°-30°, and best of all 5°, that is, the angle between the inclined groove wall and the inner end face of the nut is preferably 1°-30°; the vertical groove wall can also be slightly inclined inward, that is, the angle between the surface of the vertical groove wall and the inner end face of the nut is 90°-60°, so that after it is engaged with the locking teeth on the matching washer, the bolt is even more impossible to loosen.

[0017] The contact surface between the gasket and the fastener is called the lower surface. A retaining strip is provided on the lower surface of the gasket. The retaining strip matches the groove in the non-circular through hole, so that the retaining strip can be embedded in the groove and the gasket cannot rotate. That is, the retaining strip matches the non-circular part in the non-circular through hole, so that the retaining strip can be stably inserted into the non-circular position in the non-circular through hole. One retaining strip can be provided, or several retaining strips can be provided. The length of the retaining strip is equal to or less than the length of the groove of the fastener.

[0018] The upper surface of the washer is provided with retaining teeth to prevent the nut from loosening. The surface of the retaining teeth includes an inclined tooth surface and a vertical tooth surface that are directly connected by a bend. The vertical tooth surface is perpendicular to the upper surface of the washer, and the inclined tooth surface is inclined to the upper surface of the washer. The inclination direction of the inclined tooth surface is opposite to the tightening direction of the nut's internal thread. That is, the protruding and supporting direction of the retaining teeth abuts against the loosening direction of the nut's internal thread, making the nut unable to be loosened and only tightened. In the initial state without spring pressure, the inclination angle of the inclined tooth surface relative to the upper surface of the washer is greater than 0° and less than 45°, preferably 1°-30°, and most preferably 5°. That is, the preferred angle between the inclined tooth surface and the upper surface of the washer is... The angle is 1°-30°; the locking teeth can be elastic locking teeth or non-elastic locking teeth. The elastic locking teeth are formed by cutting a section of the gasket and bending it upwards to form an elastic locking tooth that can be compressed back after extending. The non-elastic locking teeth are directly generated or welded to the upper surface of the gasket; the number of locking teeth can be one or several. When several are set, the locking teeth are evenly distributed radially on the upper surface of the gasket; the vertical tooth surface can also be slightly inclined inward, that is, the angle between the tooth surface named vertical tooth surface and the upper surface of the gasket is 90°-60°. In this way, after it is engaged with the tooth groove on the matching nut, the nut will be even more difficult to loosen.

[0019] The grooved single-head self-locking anti-loosening and anti-theft fastening assembly includes a bolt, a washer, and through holes on the fasteners. The fasteners include an upper fastener and a lower fastener. The fastener in contact with the nut on the bolt is called the upper fastener, and the lowest fastener is called the lower fastener. In actual applications, there may be more than one lower fastener. All fasteners above the lower fasteners are provided with non-circular through holes. A non-circular through hole refers to a through hole with a groove on the inner ring wall of a circular hole, the groove penetrating the entire inner ring wall. The non-circular portion of the non-circular through hole is called a groove; that is, the non-circular through hole is an elliptical through hole. The through hole can be any one of the following: an irregular circular through hole, or a circular through hole with a groove on its inner ring wall; the groove can be a non-circular part of an elliptical through hole, a non-circular part of an irregular circular through hole, or a groove in a circular through hole with a groove on its inner ring wall; that is, the groove is a groove on the inner ring wall of the through hole, or an irregular part other than the circular through hole in an irregular circular through hole, or a curved tooth-shaped part other than the circular through hole in an elliptical through hole; multiple grooves can also be provided on the inner ring wall that penetrate the entire inner ring wall; the lower fastener is provided with a screw hole, which refers to a through hole or blind hole with internal threads on the inner ring wall, and the outlet of the screw hole on the inner ring wall is provided with a groove.

[0020] The bolt includes a screw and a nut fixed to one end of the screw. Several grooves are directly formed on the inner end face of the nut, and these grooves are radially and evenly distributed on the inner end face of the nut. The groove walls include a vertical groove wall and an inclined groove wall that are directly connected by a bend. The vertical groove wall is perpendicular to the inner end face of the nut, and the inclined groove wall is inclined to the inner end face of the nut. The inclination direction of the inclined groove wall is the same as the tightening direction of the external thread of the screw on the bolt. That is, the grooves, along the tightening direction of the external thread of the screw, hold the washer... The locking teeth are pressed together, and then the vertical tooth surface of the locking teeth is made to fit against the vertical groove wall of the tooth groove, so that the nut cannot be loosened and can only be tightened; the inclination angle of the inclined groove wall is greater than 0° and less than 45°, preferably 1°-30°, and best of all 5°, that is, the angle between the inclined groove wall and the inner end face of the nut is preferably 1°-30°; the vertical groove wall can also be slightly inclined inward, that is, the angle between the surface of the vertical groove wall and the inner end face of the nut is 90°-60°, so that after it is engaged with the locking teeth on the matching washer, the bolt is even more impossible to loosen.

[0021] The contact surface between the gasket and the fastener is called the lower surface. A retaining strip is provided on the lower surface of the gasket. The retaining strip matches the groove in the non-circular through hole, so that the retaining strip can be embedded in the groove and the gasket cannot rotate. That is, the retaining strip matches the non-circular part in the non-circular through hole, so that the retaining strip can be stably inserted into the non-circular position in the non-circular through hole. One retaining strip can be provided, or several retaining strips can be provided. The length of the retaining strip is equal to the thickness of the upper fastener, i.e., the length of the groove plus the length of the groove on the lower fastener, or less than the length of the groove on the upper fastener plus the length of the groove on the lower fastener but greater than the length of the groove on the upper fastener.

[0022] The upper surface of the washer is provided with retaining teeth to prevent the nut from loosening. The surface of the retaining teeth includes an inclined tooth surface and a vertical tooth surface that are directly connected by a bend. The vertical tooth surface is perpendicular to the upper surface of the washer, and the inclined tooth surface is inclined to the upper surface of the washer. The inclination direction of the inclined tooth surface is opposite to the tightening direction of the nut's internal thread. That is, the protruding and supporting direction of the retaining teeth abuts against the loosening direction of the nut's internal thread, making the nut unable to be loosened and only tightened. In the initial state without spring pressure, the inclination angle of the inclined tooth surface relative to the upper surface of the washer is greater than 0° and less than 45°, preferably 1°-30°, and most preferably 5°. That is, the preferred angle between the inclined tooth surface and the upper surface of the washer is... The angle is 1°-30°; the locking teeth can be elastic locking teeth or non-elastic locking teeth. The elastic locking teeth are formed by cutting a section of the gasket and bending it upwards to form an elastic locking tooth that can be compressed back after extending. The non-elastic locking teeth are directly generated or welded to the upper surface of the gasket; the number of locking teeth can be one or several. When several are set, the locking teeth are evenly distributed radially on the upper surface of the gasket; the vertical tooth surface can also be slightly inclined inward, that is, the angle between the tooth surface named vertical tooth surface and the upper surface of the gasket is 90°-60°. In this way, after it is engaged with the tooth groove on the matching nut, the nut will be even more difficult to loosen.

[0023] A fastener has a groove or recess on the inner ring wall of a through hole or threaded hole. The through hole refers to a through hole without internal threads on the inner ring wall, and the threaded hole refers to a through hole or blind hole with internal threads on the inner ring wall. The groove is a slot that penetrates the entire through hole or threaded hole and is parallel to the axis of the through hole or threaded hole. The recess is a short, shallow groove on the inner ring wall at the outlet of the through hole or threaded hole. A through hole or threaded hole with a groove or recess is called a non-circular through hole, meaning it can be any one of an elliptical through hole, an irregular circular through hole, or a circular through hole with a groove or recess on the inner ring wall. The groove or recess can be considered as the non-circular crescent portion of an elliptical through hole, the non-circular irregular portion of an irregular circular through hole, or the groove or recess on the inner ring wall of a circular through hole. One or more grooves penetrating the entire inner ring wall can be provided on the inner ring wall; one or more recesses can also be provided at the outlet of the inner ring wall.

[0024] A washer has a lower surface as its contact surface with a fastener. The lower surface of the washer has a retaining strip for embedding into a groove or recess in a through hole or threaded hole on the fastener, preventing the washer from rotating left or right. One or more retaining strips can be provided. The upper surface of the washer has retaining teeth, the surfaces of which include a directly connected inclined tooth surface and a vertical tooth surface. The vertical tooth surface is perpendicular to the upper surface of the washer, and the inclined tooth surface is inclined to the upper surface of the washer. When the washer is used as a washer for a nut, the inclination direction of the inclined tooth surface is opposite to the tightening direction of the nut's internal thread; that is, the protruding and supporting direction of the retaining teeth abuts against the loosening direction of the nut's internal thread, preventing the nut from loosening and only allowing it to tighten. When the washer is used as a washer for a bolt, the inclination direction of the inclined tooth surface is opposite to the tightening direction of the bolt's external thread; that is, the protruding and supporting direction of the retaining teeth abuts against the external thread of the bolt. The direction of rotation is such that the bolt can only be tightened and not loosened. In the initial state without spring pressure, the angle of inclination of the inclined tooth surface relative to the upper surface of the washer is greater than 0° and less than 45°, preferably 1°-30°, and best at 5°, that is, the angle between the inclined tooth surface and the upper surface of the washer is preferably 1°-30°. The locking teeth can be elastic locking teeth or non-elastic locking teeth. The elastic locking teeth are formed by cutting a section of the washer and bending it upward to form an elastic locking tooth that can be compressed back after extending. The non-elastic locking teeth are directly generated or welded to the upper surface of the washer. The number of locking teeth can be one or several. When several are set, the locking teeth are evenly distributed radially on the upper surface of the washer. The vertical tooth surface can also be slightly inclined inward, that is, the angle between the tooth surface named vertical tooth surface and the upper surface of the washer is 90°-60°. In this way, after it meshes with the tooth groove on the matching nut or bolt, the nut or bolt will be even more difficult to loosen.

[0025] A clamp-on bolt includes a screw and a nut fixedly formed at one end of the screw. A clamp is provided on the screw end where the nut connects to the screw, i.e., one side of the clamp is directly formed on the end face of the nut, and the other side of the clamp is directly formed on the end of the screw. The clamp is used to be embedded in the inner ring wall groove of the fastener in a non-through hole. One or more clamps can be provided. The clamp-on bolt is used to match anti-loosening and anti-theft fastening components and related parts.

[0026] A toothed bolt includes a threaded rod and a nut fixed to one end of the threaded rod. The inner end face of the nut has a plurality of toothed grooves directly formed thereon, the grooves being radially and evenly distributed on the inner end face of the nut. The groove walls include a vertical groove wall and an inclined groove wall that are directly connected by a bend. The vertical groove wall is perpendicular to the inner end face of the nut, and the inclined groove wall is inclined to the inner end face of the nut. The inclination direction of the inclined groove wall is the same as the tightening direction of the external thread of the threaded rod, i.e., the toothed grooves are aligned with the tightening direction of the external thread of the threaded rod. Press the retaining teeth on the washer firmly, then make the vertical tooth surface of the retaining teeth fit into the vertical groove wall of the tooth groove, so that the bolt cannot be loosened, but can only be tightened; the inclination angle of the inclined groove wall is greater than 0° and less than 45°, preferably 1°-30°, and best of all 5°, that is, the angle between the inclined groove wall and the inner end face of the nut is preferably 1°-30°; the vertical groove wall can also be slightly inclined inward, that is, the angle between the surface of the vertical groove wall and the inner end face of the nut is 90°-60°, so that after it is engaged with the retaining teeth on the matching washer, the bolt is even more impossible to loosen.

[0027] A method for manufacturing through holes in fasteners. Existing through holes in fasteners are all circular through holes. No one has ever thought of making the through holes used for fastening on fasteners into non-circular through holes. The method for making the through holes in fasteners into non-circular through holes is to use stamping to make the stamping surface of the punch used to stamp the through hole of the fastener into a non-circular, non-rotatable shape, or to use laser cutting, plasma cutting, or water jet cutting to make the cutting path of the cutting rays into a non-circular state to make a non-circular through hole.

[0028] An installation and usage method for an anti-loosening and anti-theft fastening component and its related parts, comprising the following steps:

[0029] S1: Insert the bolt into the through hole of the fastener, so that the retainer on the end of the bolt is embedded in the groove in the through hole of the fastener, and the tail end of the bolt passes through the entire fastener and extends out of the through hole of the entire fastener and is exposed outside the other side surface of the entire fastener.

[0030] S2: Insert the washer onto the screw, and make the inner surface of the washer fit tightly against the fastener on the other side, and make the retaining strip on the inner surface of the washer embed into the groove in the through hole of the fastener on the other side.

[0031] S3: Screw the nut onto the screw and make the grooves on the nut lock into the teeth on the washer.

[0032] A method for installing and using a single-head self-locking anti-loosening and anti-theft fastening component, when a through groove is provided on the inner ring wall of the fastener, is as follows:

[0033] S1: The retaining strip on the gasket passes through the non-circular through hole of the upper fastener and is embedded in the groove, and the front end of the retaining strip is embedded in the groove of the screw hole of the lower fastener.

[0034] S2: Pass the bolt through the non-circular through hole of the upper fastener, then screw the bolt shank into the threaded hole of the lower fastener, and make the teeth on the bolt nut engage with the teeth on the washer. This operation can completely prevent the bolt from loosening.

[0035] A method for installing and using a single-head self-locking anti-loosening and anti-theft fastening component, when the inner ring wall of the fastener does not have a through groove but only a groove, follow these steps:

[0036] S1: The retaining strip on the gasket is embedded in the groove in the non-through hole of the upper fastener.

[0037] S2: Pass the bolt through the non-circular through hole of the upper fastener, then screw the bolt shank into the threaded hole of the lower fastener, and engage the teeth on the bolt nut with the teeth on the washer. This operation also prevents the bolt from loosening, but may cause rotational loosening between the upper and lower fasteners.

[0038] Compared with the prior art, the present invention has the following beneficial effects:

[0039] (1) A non-circular through hole is provided on the fastener, that is, a through groove or non-through groove is provided in the through hole, and a retainer is provided on the bolt and nut. The retainer can be embedded in the groove to prevent the bolt from loosening.

[0040] (2) A retaining strip is provided on one side of the gasket and a retaining tooth is provided on the other side. The retaining strip is embedded in the groove, which can prevent the gasket from loosening.

[0041] (3) A toothed groove is provided on one end face of the nut. After the toothed groove and the retaining tooth interlock, the nut cannot be loosened.

[0042] (4) The overall structure allows the bolts, nuts, washers and through holes on the fasteners to be interlocked and locked, making them unable to loosen and achieving the effect of preventing loosening and theft. At the same time, when tightening, the clamping force of the conventional force is not required, so that the screw will not be subjected to excessive shearing force. Under long-term vibration, the screw will not break.

[0043] (5) A toothed groove is provided on the nut of the bolt. After the toothed groove and the retaining tooth interlock, the bolt cannot be loosened. This is suitable for fastening situations where a nut is not required. Attached Figure Description

[0044] Figure 1 This is a schematic diagram of various structural cases of non-circular through holes on the fastener in Example 1.

[0045] Figure 2 This is a schematic diagram of the lower surface structure of the gasket in Example 2.

[0046] Figure 3 This is a schematic diagram of the upper surface structure of the gasket in Example 2.

[0047] Figure 4 This is a schematic diagram of a clamp bolt structure with a clamp on the nut of the bolt in Example 3.

[0048] Figure 5 This is a schematic diagram of a toothed bolt structure with a toothed groove on the nut of the bolt in Example 4.

[0049] Figure 6 This is a schematic diagram of the structure in Example 5 where a toothed groove is provided on one end face of the nut.

[0050] Figure 7 This is an exploded structural diagram of each component in the anti-loosening and anti-theft fastening assembly and its related parts in Example 6.

[0051] Figure 8 This is an exploded structural diagram of each component in the single-head self-locking anti-loosening and anti-theft fastening assembly of Example 8.

[0052] Figure 9 This is an exploded structural diagram of each component in the single-head self-locking anti-loosening and anti-theft fastening assembly of Example 9.

[0053] Figure 10 This is a test curve diagram of the fastening assembly in Example 6.

[0054] Figure 11 A comparative test curve for commercially available anti-loosening fastener products.

[0055] In the diagram: 1. Bolt, 2. Nut, 3. Washer, 4. Fastener, 5. Through hole, 6. Screw hole, 7. Groove, 8. Recess, 9. Clip, 10. Clip tooth, 101. Inclined tooth surface, 102. Vertical tooth surface, 11. Screw, 12. Nut, 13. Clamp, 14. Tooth groove, 141. Vertical groove wall, 142. Inclined groove wall, 41. Upper fastener, 42. Lower fastener. Detailed Implementation

[0056] The present invention will be further described below with reference to the embodiments. The following embodiments are intended to illustrate the present invention and not to further limit the present invention, and should not be used to limit the scope of protection of the present invention.

[0057] The inventor conducted long-term research on fastener devices and found that fasteners that can prevent loosening often have screws that are prone to breakage, while fasteners with screws that are not prone to breakage do not prevent loosening. For example, the double-disc self-locking washer anti-loosening component currently used in wind power equipment can form a self-locking structure with the nut, double-disc self-locking washer and fastened fastener together when the nut is tightened too much, exceeding 50% of the screw's yield force, thus preventing loosening. However, long-term observation has shown that over-tightening causes slight tensile deformation of the screw, which can easily cause breakage at the stretched part of the screw under long-term vibration.

[0058] For example, the Japanese company Hardlock uses a double-nut eccentric design. When both nuts are fully screwed onto the screw, the upper and lower nuts form a horizontal line that crosses and compresses the screw, creating a shear force. Under prolonged vibration, the screw is prone to breakage at the shear point.

[0059] For example, the American Spiel nuts have a 30° bevel cut off at the tip of the internal thread to create an anti-loosening fastener. If the pressure applied between the nut and the screw is too small, the beveled thread cannot deform the nut thread and cannot create a compressive force on the screw, thus failing to produce an anti-loosening effect. When the pressure applied between the nut and the screw is too large, the 30° beveled thread can deform the nut thread and create a compressive force on the screw, achieving an anti-loosening effect. However, due to the excessive torque applied by the nut, the screw will develop tensile indentations. Under prolonged vibration, the screw is prone to breakage at the location of the tensile indentation.

[0060] To prevent fasteners from loosening and falling off, the industry requires nuts to be tightened to exceed 50% of the screw's yield strength. However, through long-term observation and extensive testing, the inventor discovered that over-tightening would create micro-indentations in the screw, leading to breakage after prolonged vibration. Conversely, slack tightening would cause the nut and screw to easily loosen. Therefore, the inventor developed a fastening component that does not require excessive tightening, preventing loosening, theft, and screw breakage. Its structure is as follows: Example

[0061] To create a through hole 5 on the fastener 4, that is, the fastening and mounting hole of the fastener 4. The existing through holes 5 on the fastener 4 are all circular unthreaded through holes or circular internal thread blind holes. No one has ever thought of making the unthreaded through hole or internal thread hole 6 on the fastener 4 used for fastening into a non-circular through hole or non-circular internal thread hole.

[0062] like Figure 1As shown, in this embodiment, the mounting hole on the fastener 4 is made into a non-circular through hole 5 or a non-circular threaded hole. A relatively simple method is to set a groove 7 or a recess 8 on the inner ring wall of the existing circular through hole or circular threaded hole on the fastener 4. The through hole 5 refers to a through hole without internal threads on the inner ring wall, and the threaded hole 6 refers to a through hole or blind hole with internal threads on the inner ring wall. The groove 7 refers to a groove that penetrates the entire through hole or threaded hole, and the groove 7 is parallel to the axis of the through hole or threaded hole. The recess 8 refers to a short, shallow groove on the inner ring wall at the outlet of the through hole 5 or threaded hole 6. The through hole 5 or threaded hole 6 with groove 7 or recess 8 is called a non-circular through hole. In application, the non-circular through hole can be made into an elliptical through hole or an irregular circle. The through hole 5 can be any one of the following: a through hole, or a circular through hole with a groove 7 or a recess 8 on the inner ring wall; in this embodiment, a stamping method is used to make the stamping surface of the punch used to stamp the through hole of the fastener into a non-circular, non-rotatable shape, and then stamping is performed to make a through hole 5; or laser cutting, plasma cutting, or water jet cutting is used to make the cutting path of the cutting rays into a non-circular state to make a non-circular through hole 5 with a groove 7; or a circular through hole 5 or screw hole 6 is made using conventional methods, and then a short and shallow recess 8 is dug on the inner ring wall of the exit edge of the through hole 5 or screw hole 6; in this embodiment, only one groove 7 is set in the through hole 5, and only one recess 8 is set in the screw hole 6, or two or more grooves 7 or recesses 8 can be set. Example

[0063] like Figure 2 , Figure 3 As shown, a gasket 3 is manufactured. The contact surface between the gasket 3 and the fastener 4 is called the lower surface. A retaining strip 9 is provided on the lower surface of the gasket 3. In this embodiment, the retaining strip 9 is generated by connecting the edge of the center circle of the gasket 3 directly to the lower surface in a vertical direction. This makes it easy to embed the retaining strip into the groove 7. Alternatively, a downward protruding retaining strip 9 can be generated directly on the lower surface of the gasket 3. One retaining strip 9 can be provided, or multiple retaining strips can be provided, as long as they match the size and position of the groove 7. In this embodiment, one retaining strip 9 is provided on the lower surface of the gasket 3.

[0064] Then, a retaining tooth 10 is provided on the upper surface of the gasket 3. The surface of the retaining tooth 10 includes an inclined tooth surface 101 and a vertical tooth surface 102 that are directly connected by a bend. The vertical tooth surface 102 is perpendicular to the upper surface of the gasket, and the inclined tooth surface 101 is inclined to the upper surface of the gasket. The retaining tooth 10 can be an elastic retaining tooth or a non-elastic retaining tooth. The elastic retaining tooth is formed by cutting a section of the gasket 3 and bending it upward to form an inclined structure that extends above the upper surface of the gasket. It is an elastic retaining tooth that can be compressed back. The non-elastic retaining tooth is directly generated or welded to the upper surface of the gasket. The number of retaining teeth 10 can be one or several. When several are provided, the retaining teeth 10 are radially and evenly distributed on the upper surface of the gasket 3. In this embodiment, two retaining teeth 10 are provided on the upper surface of the gasket 3. In the initial non-elastic state, the inclination angle of the inclined tooth surface 101 relative to the upper surface of the gasket is greater than 1° and less than 30°. In this embodiment, the angle between the inclined tooth surface 101 and the upper surface of the gasket 3 is 5°.

[0065] The washer 3 can be used as a washer for nut 2 or as a washer for bolt 1. When the washer 3 is used as a washer for nut 2, the inclination direction of the inclined tooth surface 101 is opposite to the tightening direction of the internal thread of nut 2. That is, the protruding support direction of the retaining tooth 10 abuts against the loosening direction of the internal thread of nut 2, so that nut 2 cannot be loosened and can only be tightened. When the washer 3 is used as a washer for bolt 1, the inclination direction of the inclined tooth surface 101 is opposite to the tightening direction of the external thread of bolt 1. That is, the protruding support direction of the retaining tooth 3 abuts against the loosening direction of the external thread of bolt 1, so that bolt 1 cannot be loosened and can only be tightened.

[0066] To achieve better anti-loosening and anti-theft effects for the fastening components, the vertical tooth surface 102 can be slightly tilted inward. Generally, the included angle between the tooth surface named vertical tooth surface 102 and the upper surface of the washer 3 is made to be less than 90° and greater than 60°. In this embodiment, the included angle is made to be 85°. After the teeth mesh with the tooth groove on the matching nut 2 or bolt 1, the nut 2 or bolt 1 will be even more difficult to loosen.

[0067] To facilitate the removal and maintenance of the fastening assembly, the vertical tooth surface 102 can be slightly tilted outwards to loosen and remove the nut 2 under greater torque. Generally, the vertical tooth surface 102 of the retaining tooth 10 on the washer 3 is tilted 1°-15° in the direction of loosening the nut 2. In this embodiment, the tilt angle is 5°. That is, the angle between the surface named vertical tooth surface 102 and the upper surface of the washer 3 is generally 91°-105°. In this embodiment, the angle is 95°. This allows the nut 2 to be loosened and removed under greater torque for maintenance. Example

[0068] like Figure 4As shown, a bolt 1 is manufactured with a retainer 13 at the vertical connection between the bolt shank 11 and the nut 12. One side of the retainer 13 is directly formed on the inner end face of the nut 12, and the other side of the retainer 13 is directly formed on the inner end of the bolt shank 11. This type of bolt is called a retainer bolt. The retainer 13 is used to be embedded in the groove 8 in the inner ring wall of the non-through hole 5 of the fastener 4. One or more retainers 13 can be provided on the same bolt 1. Example

[0069] like Figure 5 As shown, a bolt 1 is manufactured by directly forming several grooves 14 on the inner end face of the nut 12 on the bolt. These grooves 14 are radially and evenly distributed on the inner end face of the nut 12. The groove walls of each groove 14 include a vertical groove wall 141 and an inclined groove wall 142 that are directly connected by a bend. The vertical groove wall 141 is perpendicular to the inner end face of the nut 12, and the inclined groove wall 142 is inclined to the inner end face of the nut 12. The inclination direction of the inclined groove wall 142 is the same as the tightening direction of the external thread of the screw 11 on the bolt 1. That is, when tightening, the grooves 14 press the retaining teeth 10 on the washer 3 along the tightening direction of the external thread of the screw 11, and then the retaining teeth 10 are tightened. The vertical tooth surface 102 of the tooth 10 fits into the vertical groove wall 141 of the tooth groove 14, making the bolt 1 unable to be loosened and only tightened; this type of bolt is called a toothed bolt; generally, the inclination angle of the inclined groove wall 142 is made to be greater than 1° and less than 30°. In this embodiment, the angle between the inclined groove wall 142 and the inner end face of the nut 12 is made to be 5°; the number of tooth grooves 14 on the nut 12 can be the same as or different from the number of retaining teeth 10 on the washer 3, but it must be an integer multiple of the number of retaining teeth 10, so as to ensure that each retaining tooth 10 on the washer 3 can mesh with the tooth groove 14 on the nut 12; in this embodiment, twelve tooth grooves 14 are provided on the end face of the nut 12.

[0070] The vertical groove wall 141 can also be slightly inclined inward. That is, the angle between the surface of the vertical groove wall 141 and the inner end face of the nut 12 is generally 90°-60°. In this embodiment, the angle is made to be 85°. After it engages with the teeth 10 on the matching washer 3, the bolt is even more difficult to loosen.

[0071] To allow the fastening components to be unscrewed and removed for maintenance, the vertical groove wall 141 can be slightly tilted outwards to loosen and remove the bolt 1 under greater torque. Generally, the vertical groove wall 141 of the toothed groove 14 on the nut 12 is tilted 1°-15° in the direction of loosening the screw 11. In this embodiment, the tilt is made to be 5°. That is, the angle between the surface of the vertical groove wall 141 and the inner end face of the nut 12 is generally made to be 91°-105°. In this embodiment, the angle is made to be 95°. This allows the bolt 1 to be loosened and removed under greater torque for maintenance. Example

[0072] A nut 2 is manufactured by directly forming several toothed grooves 14 on one end face of an existing nut 2. These grooves 14 are radially and evenly distributed around the threaded hole on that end face of the nut 2. The groove walls of each groove 14 include a vertical groove wall 141 and an inclined groove wall 142 that are directly connected by a bend. The vertical groove wall 141 is perpendicular to the end face of the nut, and the inclined groove wall 142 is inclined to the end face of the nut. The inclination direction of the inclined groove wall 142 is the same as the tightening direction of the internal thread on the nut 2. That is, when tightening, the toothed grooves 14 press the retaining teeth 10 on the washer 3 together along the tightening direction of the nut's internal thread. Then, the vertical tooth surface 102 of the retaining tooth 10 is made to fit against the vertical groove wall 141 of the tooth groove 14, so that the nut 2 cannot be loosened, but can only be tightened; generally, the inclination angle of the inclined groove wall 142 is made to be greater than 1° and less than 30°. In this embodiment, the angle between the inclined groove wall 142 and the end face of the nut is made to be 5°; the number of tooth grooves 14 on the nut 2 and the number of retaining teeth 10 on the washer 3 can be the same or different, but must be an integer multiple of the number of retaining teeth, so as to ensure that each retaining tooth 10 on the washer 3 can mesh with the tooth groove 14 on the nut 2; in this embodiment, twelve tooth grooves 14 are provided on the end face of the nut.

[0073] The vertical groove wall 141 can also be slightly inclined inward. Generally, the angle between the surface of the vertical groove wall 141 and the end face of the nut is 90°-60°. In this embodiment, the angle is made to be 85°. After it engages with the tooth 10 on the matching washer 3, the nut 2 is even more difficult to loosen.

[0074] To allow the fastening assembly to be unscrewed and removed for maintenance, the vertical groove wall 141 can be slightly tilted outwards to loosen and remove the nut 2 under greater torque. Generally, the vertical groove wall 141 of the toothed groove 14 on the nut 2 is tilted 1°-15° in the direction of nut loosening. In this embodiment, it is tilted at 5°. That is, the angle between the surface of the vertical groove wall 141 and the end face of the nut is generally 91°-105°. In this embodiment, the angle is 95°. This allows the nut 2 to be loosened and removed under greater torque for maintenance. Example

[0075] like Figure 7 As shown, an anti-loosening and anti-theft fastening assembly and its related components are manufactured. The fastening assembly includes a bolt 1, a nut 2, a washer 3, and a through hole 5 on the fastened part 4.

[0076] The inner ring wall of the through hole 5 on the fastener 4 is provided with a groove 7 or a recess 8. The through hole 5 refers to a through hole without internal threads on the inner ring wall. The groove 7 refers to a groove that runs through the entire through hole. The groove 7 is parallel to the axis of the through hole 5. The recess 8 refers to a short, shallow groove on the inner ring wall at the outlet of the through hole 5. One or more grooves 7 or recesses 8 can be provided in the same through hole 5. There are at least two fasteners 4. For ease of production, in this embodiment, the through hole 5 is stamped on the fastener 4 using a stamping method, and a through groove 7 is provided on the through hole 5.

[0077] The bolt 1 is a snap-fit ​​bolt, that is, a snap-fit ​​13 is provided on the end of the screw at the connection position between the nut 12 and the screw 11. One side of the snap-fit ​​13 is directly formed on the end face of the nut, and the other side of the snap-fit ​​13 is directly formed on the end of the screw. The size of the snap-fit ​​13 matches the groove 7 in the through hole 5 of the fastener 4, so that the snap-fit ​​13 can be embedded into the groove 7 on the inner ring wall at the outlet position of the through hole 5 of the fastener 4. Here, the snap-fit ​​13 is set as one.

[0078] A retaining strip 9 is provided on the lower surface of the gasket 3. The retaining strip 9 matches the size of the groove 7 in the through hole 5 of the fastener 4, allowing the retaining strip 9 to be embedded in the groove 7. Two retaining teeth 10 are provided on the upper surface of the gasket 3. The two retaining teeth 10 are located on the diameter extension line of the upper surface of the gasket 3. The surface of the retaining teeth 10 includes an inclined tooth surface 101 and a vertical tooth surface 102 that are directly connected by a bend. The vertical tooth surface 102 is perpendicular to the upper surface of the gasket 3, and the inclined tooth surface 101 is inclined to the upper surface of the gasket 3. The inclination direction of the inclined tooth surface 101 is opposite to the tightening direction of the internal thread of the nut 2. In the non-elastic state, the inclination angle of the inclined tooth surface 101 relative to the upper surface of the gasket 3 is generally made to be greater than 1° and less than 30°. In this embodiment, it is made to be 5°. The locking tooth 10 can be an elastic locking tooth or a non-elastic locking tooth. In this embodiment, it is made to be an elastic locking tooth. That is, a small piece is cut along the diameter line and the circular line on the surface of the gasket 3 and connected to the gasket 3. Then, it is bent upward to form an elastic locking tooth that can be elastically compressed and extended out of the upper surface of the gasket 3. In this embodiment, two locking teeth 10 are provided on the gasket 3. The two locking teeth 10 are respectively provided on the diameter line on the upper surface of the gasket 3.

[0079] A plurality of grooves 14 are directly formed on one end face of the nut 2. These grooves 14 are radially and evenly distributed on the end face of the nut 2. The groove wall of the groove 14 includes a vertical groove wall 141 and an inclined groove wall 142 that are directly connected by a bend. The vertical groove wall 141 is perpendicular to the end face of the nut, and the inclined groove wall 142 is inclined to the end face of the nut. The inclination direction of the inclined groove wall 142 is the same as the tightening direction of the internal thread of the nut 2. Generally, the inclination angle of the inclined groove wall 142 is made to be greater than 1° and less than 30°. In this embodiment, the angle between the inclined groove wall 142 and the end face of the nut is made to be 5°. Each nut 2 has twelve grooves 14.

[0080] The through hole 5, bolt 1, nut 2, and washer 3 on the fastener 4 together constitute the anti-loosening and anti-theft fastening assembly and its related components. During installation and use, follow these steps:

[0081] S1: Insert the bolt 1 into the through hole 5 of the fastener 4, so that the retainer 13 on the end of the bolt 1 is embedded in the groove 7 in the through hole 5 of the fastener, and so that the tail end of the bolt 1 passes through the entire fastener 4 and extends out of the through hole 5 of the entire fastener 4 and is exposed outside the other side surface of the entire fastener 4.

[0082] S2: Wrap the washer 3 around the screw 11, and make the inner surface of the washer 3 fit tightly against the fastener 4 on the other side, and make the retaining strip 9 on the inner surface of the washer 3 embedded in the groove 7 in the through hole 5 of the fastener 4 on the other side.

[0083] S3: Screw the nut 2 onto the screw 11 and make the groove 14 on the nut 2 lock the tooth 10 on the washer 3; the final tightening does not need to be too tight, just 20%-50% of the existing standard clamping force is sufficient. Since it does not need to be tightened too much, the screw 11 will basically not break.

[0084] This structure, in which fasteners 4 are secured at both ends by nuts 12 and nuts 2 on bolts 1 during installation and use, is called an anti-loosening and anti-theft fastening assembly and its related components. Example

[0085] In the above embodiment 6, the vertical groove wall 141 on the toothed groove 14 of the nut 2 is vertical, meaning it can only be tightened but not unscrewed. This prevents the nut from loosening and also prevents theft, but prevents it from being unscrewed for equipment maintenance. To make the fastener both tighten and unscrewable, this embodiment slightly tilts the vertical toothed surface 102 on the washer 3, or slightly tilts the vertical groove wall 141 on the nut 2, or slightly tilts both the vertical toothed surface 102 and the vertical groove wall 141 simultaneously. This allows the nut 2 to be loosened and removed under greater torque. Generally, the retaining teeth 1 on the washer 3 are... The vertical tooth surface 102 of the nut 2 is inclined at 1°-15° in the direction of loosening the nut. In this embodiment, it is inclined at 5°. That is, the angle between the surface named vertical tooth surface 102 and the upper surface of the washer 3 is generally 91°-105°, and in this case, the angle is 95°. Similarly, the vertical groove wall 141 on the nut 2 is generally inclined at 1°-15° in the direction of loosening the nut 2. In this embodiment, it is inclined at 5°. That is, the angle between the surface named vertical groove wall 141 and the end face of the nut 2 is generally 91°-105°, and in this case, the angle is 95°. This allows the nut 2 to be unscrewed with force for disassembly and maintenance. Example

[0086] like Figure 8 As shown, a single-head self-locking anti-loosening and anti-theft fastening assembly is manufactured, including a bolt 2, a washer 3, and a through hole 5 on the fastener 4.

[0087] The fastener 4 includes an upper fastener 41 and a lower fastener 42. The fastener 4 that contacts the nut 12 on the bolt 1 is called the upper fastener 41, and the lowest fastener is called the lower fastener 42. The upper fastener 41 is provided with a through hole 5, which refers to a through hole 5 without internal threads on the inner ring wall. The inner ring wall of the through hole is provided with a groove 7 that penetrates the entire inner ring wall. The inner ring wall of the through hole 5 can be provided with one, two, or more grooves 7. In this embodiment, a through groove 7 is provided. The lower fastener 42 is provided with a screw hole 6, which refers to a through hole or blind hole with internal threads on the inner ring wall. The outlet of the inner ring wall of the screw hole 6 is provided with a groove 8, which refers to a shallow short groove that does not penetrate the inner ring wall.

[0088] A plurality of grooves 14 are directly formed on the inner end face of the nut 12 on the bolt 1. These grooves 14 are radially and evenly distributed on the inner end face of the nut 12. The groove wall of the groove 14 includes a vertical groove wall 141 and an inclined groove wall 142 that are directly connected by a bend. The vertical groove wall 141 is perpendicular to the inner end face of the nut 12, and the inclined groove wall 142 is inclined to the inner end face of the nut. The inclination direction of the inclined groove wall 142 is the same as the tightening direction of the external thread of the bolt 1. Generally, the inclination angle of the inclined groove wall 142 is made to be greater than 1° and less than 30°. In this embodiment, the angle between the inclined groove wall 142 and the inner end face of the nut 12 is made to be 5°.

[0089] The lower surface of the gasket 3 is provided with a retaining strip 9, which matches the groove 7 in the through hole 5 and the recess 8 in the screw hole 6, so that the retaining strip 9 can be embedded in the groove 7 and the recess 8, preventing the gasket 3 from rotating. The gasket 3 can have one retaining strip 9 or several retaining strips 9; in this embodiment, one retaining strip 9 is provided. The length of the retaining strip 9 is equal to the thickness of the upper fastener 41, i.e., the length of the groove 7 plus the length of the recess 8 on the lower fastener 42, or less than the length of the groove 7 on the upper fastener 41 plus the length of the recess 8 on the lower fastener 42, but greater than the length of the groove 7 on the upper fastener 41.

[0090] The upper surface of the gasket 3 is provided with a retaining tooth 10; the surface of the retaining tooth 10 includes an inclined tooth surface 101 and a vertical tooth surface 102 that are directly connected by a bend. The vertical tooth surface 102 is perpendicular to the upper surface of the gasket 3, and the inclined tooth surface 102 is inclined to the upper surface of the gasket 3. The inclination direction of the inclined tooth surface 102 is opposite to the tightening direction of the internal thread of the nut 2; the retaining tooth 10 is an elastic retaining tooth. The elastic retaining tooth is formed by cutting a section of the gasket and bending it upward to form an elastic retaining tooth that can be springed back after being extended; the number of retaining teeth 10 can be one or several. Here, two retaining teeth 10 are provided in a centrally symmetrical shape with the center of the gasket as the symmetrical point.

[0091] The through hole 5, bolt 1, and washer 3 on the aforementioned fastener together form a single-head self-locking anti-loosening and anti-theft fastening assembly. When installing and using it, follow these steps:

[0092] S1: The retaining strip 9 on the gasket 3 passes through the non-circular through hole 5 of the upper fastener 41 and is embedded in the groove 7, and the front end of the retaining strip 9 is embedded in the groove 8 in the screw hole 6 of the lower fastener 42.

[0093] S2: Pass the bolt 1 through the non-circular through hole 5 of the upper fastener 41, then screw the screw 11 on the bolt 1 into the screw hole 6 of the lower fastener 42, and make the toothed groove 14 on the nut 12 of the bolt 1 lock the retaining teeth 10 on the washer 3. This operation can completely prevent the bolt from loosening; that is, the structural component that is fastened by the nut 12 on the bolt 1 at one end to the fastener 4 is called a single-head self-locking anti-loosening and anti-theft fastening component. Example

[0094] like Figure 9 As shown, another single-head self-locking anti-loosening and anti-theft fastening assembly is manufactured, including a bolt 1, a washer 3, and a through hole 5 on the fastener 4.

[0095] The fastener 4 includes an upper fastener 41 and a lower fastener 42. The fastener that contacts the nut on the bolt 1 is called the upper fastener 41, and the lowest fastener is called the lower fastener 42. The upper fastener 41 is provided with a through hole 5, which refers to a through hole 5 without internal threads on the inner ring wall. The outlet of the inner ring wall of the through hole 5 is provided with a groove 8. One, two, or more grooves 8 can be provided on the inner ring wall. In this embodiment, one groove 8 is provided. The lower fastener 42 is provided with a screw hole 6, which refers to a through hole or blind hole with internal threads on the inner ring wall. The outlet of the inner ring wall of the screw hole 6 is not provided with a groove.

[0096] A plurality of grooves 14 are directly formed on the inner end face of the nut 12 on the bolt 1. These grooves 14 are radially and evenly distributed on the inner end face of the nut 12. The groove wall of the groove 14 includes a vertical groove wall 141 and an inclined groove wall 142 that are directly connected by a bend. The vertical groove wall 141 is perpendicular to the inner end face of the nut 12, and the inclined groove wall 142 is inclined to the inner end face of the nut. The inclination direction of the inclined groove wall 142 is the same as the tightening direction of the external thread of the bolt 1. Generally, the inclination angle of the inclined groove wall 142 is made to be greater than 1° and less than 30°. In this embodiment, the angle between the inclined groove wall 142 and the inner end face of the nut 12 is made to be 5°.

[0097] The lower surface of the gasket 3 is provided with a retaining strip 9, which matches the groove 8 in the through hole 5 so that the retaining strip 9 can be embedded in the groove 8, preventing the gasket 3 from rotating. One retaining strip 9 can be provided, or several retaining strips can be provided. The length of the retaining strip 9 is equal to or less than the length of the groove 8 in the through hole 5 of the fastener 42.

[0098] The upper surface of the gasket 3 is provided with a retaining tooth 10; the surface of the retaining tooth 10 includes an inclined tooth surface 101 and a vertical tooth surface 102 that are directly connected by a bend. The vertical tooth surface 102 is perpendicular to the upper surface of the gasket 3, and the inclined tooth surface 102 is inclined to the upper surface of the gasket 3. The inclination direction of the inclined tooth surface 102 is opposite to the tightening direction of the internal thread of the nut 2; the retaining tooth 10 is an elastic retaining tooth. The elastic retaining tooth is formed by cutting a section of the gasket and bending it upward to form an elastic retaining tooth that can be springed back after being extended; the number of retaining teeth 10 can be one or several. Here, two retaining teeth 10 are provided in a centrally symmetrical shape with the center of the gasket as the symmetrical point.

[0099] The through hole 5, bolt 1, and washer 3 on the fastener 4 together form a single-head self-locking anti-loosening and anti-theft fastening assembly that only locks the fastener. When installing and using it, follow these steps:

[0100] S1: The retaining strip 9 on the gasket 3 is embedded in the groove 8 in the non-circular through hole 5 of the upper fastener 41.

[0101] S2: Pass the bolt 1 through the non-circular through hole 5 of the upper fastener 41, then screw the thread 11 on the bolt 1 into the threaded hole 6 of the lower fastener 42, and make the toothed groove 14 on the nut 12 of the bolt 1 lock the retaining tooth 10 on the washer 3. This operation can also prevent the bolt from loosening, but there may be a situation where the upper fastener 41 and the lower fastener 42 rotate and loosen. Example

[0102] In embodiments 8 and 9 above, the vertical groove wall 141 on the toothed groove 14 of the nut 12 of bolt 1 is vertical, meaning it can only be tightened but not unscrewed. This prevents the nut 2 and the bolt 11 from loosening and provides theft prevention, but prevents unscrewing for equipment maintenance. To enable the fastener to both tighten and unscrew, this embodiment slightly tilts the vertical toothed surface 102 on the washer 3, or slightly tilts the vertical groove wall 141 on the nut 12, or slightly tilts both the vertical toothed surface 102 and the vertical groove wall 141 simultaneously. This allows the bolt to be loosened and removed under greater torque. Generally, the vertical toothed surface 10 on the washer 3 is tilted... The straight tooth surface 102 is inclined at 1°-15° in the direction of loosening the nut. In this embodiment, it is inclined at 5°. That is, the angle between the surface named vertical tooth surface 102 and the upper surface of the washer 3 is generally 91°-105°, and the angle is made at 95° here. The vertical groove wall 141 on the nut 12 is generally inclined at 1°-15° in the direction of loosening the nut. In this embodiment, it is inclined at 5°. That is, the angle between the surface named vertical groove wall 141 and the end face of the nut is generally 91°-105°, and the angle is made at 95° here. In this way, the bolt can be tightened to facilitate disassembly and maintenance.

[0103] Through comparative testing, the anti-loosening and anti-theft fastening components and related parts manufactured in Example 6 were compared with the commercially available Japanese Hardlock double-nut anti-loosening fastening components under lateral vibration. The same 24mm bolt and nut assembly was used for testing. Under a strength rating of 10 and a torque of 1000, the tests were conducted according to 10,000 vibration cycles. The results of the two sets of anti-loosening fastening components purchased from the market are shown in the comparative test curves. Figure 11 The screw of the original device broke at around 4500 and 4800 vibration cycles, while the anti-loosening and anti-theft fastening assembly and related components of this application, as shown in the test curves... Figure 10 The screw continued to function normally after 10,000 vibration cycles. The reason for this is that the clamping force of the existing anti-loosening fastening components must be very high, as shown in the comparative test curve. Figure 11 The clamping force must be maintained above 100kN, otherwise it is easy to loosen, and if it is clamped too tightly, the screw may break under long-term vibration; however, this application has a self-locking structure, which can prevent the nut and screw from loosening without too much clamping force, as shown in the test curve. Figure 10 Its clamping force quickly dropped to between 50kN and 80kN. Although the clamping force was small, it was still able to maintain the necessary fastening strength. The small clamping force can prevent the screw from breaking. The softness is better than the hardness. It can be seen that the non-circular through hole structure combined with the double-sided tooth structure of the gasket and the clamping and tooth groove structure of the bolt and nut can effectively make the fastening components clamp each other. Thus, only a small clamping force is needed to achieve the effect of preventing loosening and theft, thereby preventing the screw from breaking due to long-term fastening vibration.

Claims

1. A fastening assembly for preventing loosening and theft, including a through hole, a washer, a retaining bolt, and a toothed bolt, comprising a bolt (1), a nut (2), a washer (3), and a through hole (5) on the fastener (4); characterized in that... The inner ring wall of the through hole (5) on the fastener (4) is provided with a groove (7) or a recess (8). The through hole (5) refers to a through hole without internal threads on the inner ring wall. The groove (7) refers to a groove that runs through the entire through hole. The groove (7) is parallel to the axis of the through hole (5). The recess (8) refers to a shallow short groove on the inner ring wall at the outlet of the through hole (5). The through hole (5) provided with the groove (7) or recess (8) is called a non-circular through hole. The bolt (1) includes a screw (11) and a nut (12) fixedly generated at one end of the screw. The screw end at the connection position between the nut (12) and the screw (11) is provided with a retainer (13). The retainer (13) is used to be embedded in the groove (8) or the edge position of the groove (7) on the inner ring wall of the fastener (4) in the non-through hole. The lower surface of the gasket (3) is provided with a retaining strip (9), which matches the groove (8) in the non-circular through hole; the upper surface of the gasket (3) is provided with retaining teeth (10); the surface of the retaining teeth (10) includes an inclined tooth surface (101) and a vertical tooth surface (102) that are directly connected by a turning point. The vertical tooth surface (102) is perpendicular to the upper surface of the gasket (3), and the inclined tooth surface (101) is inclined to the upper surface of the gasket (3). The inclination direction of the inclined tooth surface (101) is opposite to the tightening direction of the internal thread of the nut (2); the retaining teeth (10) are elastic retaining teeth or non-elastic retaining teeth. The elastic retaining teeth are formed by cutting a section of the gasket and bending it upward to form an elastic retaining tooth that extends onto the upper surface of the gasket. The non-elastic retaining teeth are non-elastic retaining teeth that are directly generated on the upper surface of the gasket; the number of retaining teeth (10) is one or several. When several are provided, the retaining teeth (10) are radially and evenly distributed on the upper surface of the gasket (3). A plurality of toothed grooves (14) are directly formed on one end face of the nut (2). The plurality of toothed grooves (14) are radially and evenly distributed on the end face of the nut (2). The groove wall of the toothed groove (14) includes a vertical groove wall (141) and an inclined groove wall (142) that are directly connected by a bend. The vertical groove wall (141) is perpendicular to the end face of the nut (2), and the inclined groove wall (142) is inclined to the end face of the nut (2). The inclination direction of the inclined groove wall (142) is the same as the tightening direction of the internal thread of the nut (2).

2. A fastening assembly for preventing loosening and theft, including a through hole, a washer, a retaining bolt, and a toothed bolt, comprising a bolt (1), a washer (3), and a through hole (5) on the fastener (4); characterized in that... The fastener (4) includes an upper fastener (41) and a lower fastener (42). The fastener (4) that contacts the nut (12) on the bolt (1) is called the upper fastener (41), and the lowest fastener is called the lower fastener (42). The upper fastener (41) is provided with a through hole (5). The through hole (5) refers to a hole without internal threads on the inner ring wall. The inner ring wall of the through hole (5) is provided with a groove (7) that penetrates the entire inner ring wall. Alternatively, the inner ring wall of the through hole (5) is provided with a groove (8) that is only provided at the outlet of the inner ring wall. The lower fastener (42) is provided with a screw hole (6). The screw hole (6) refers to a through hole (5) or a blind hole with internal threads on the inner ring wall. The outlet of the inner ring wall of the screw hole (6) is provided with a groove (8) or is not provided with a groove (8). The bolt (1) includes a screw (11) and a nut (12) fixedly generated at one end of the screw. Several toothed grooves (14) are directly generated on the inner end face of the nut (12) on the bolt (1). The toothed grooves (14) are radially and evenly distributed on the inner end face of the nut (12). The groove wall of the toothed groove (14) includes a vertical groove wall (141) and an inclined groove wall (142) that are directly connected by a bend. The vertical groove wall (141) is perpendicular to the inner end face of the nut (12), and the inclined groove wall (142) is inclined to the inner end face of the nut (12). The inclination direction of the inclined groove wall (142) is the same as the tightening direction of the external thread of the screw on the bolt (1). The lower surface of the gasket (3) is provided with a retaining strip (9), which matches the groove (7) or recess (8) in the non-circular through hole. The length of the retaining strip (9) is equal to the length of the groove (7) on the upper fastener (41) plus the length of the recess (8) on the lower fastener (42), or less than the length of the groove (7) on the upper fastener (41) plus the length of the recess (8) on the lower fastener (42) but greater than the length of the groove (7) on the upper fastener (41); or, when the upper fastener (41) does not have a groove (7) on the inner ring wall but only a short and shallow recess (8), the length of the retaining strip (9) is equal to or less than the length of the recess (8). The upper surface of the gasket (3) is provided with a locking tooth (10); the surface of the locking tooth (10) includes an inclined tooth surface (101) and a vertical tooth surface (102) that are directly connected by a turning point. The vertical tooth surface (102) is perpendicular to the upper surface of the gasket (3), and the inclined tooth surface (101) is inclined to the upper surface of the gasket (3). The inclination direction of the inclined tooth surface (101) is opposite to the tightening direction of the internal thread of the nut (2). The locking tooth (10) is an elastic locking tooth or a non-elastic locking tooth. The elastic locking tooth is formed by cutting a section of the gasket (3) and bending it upward to form an elastic locking tooth that extends onto the upper surface of the gasket (3). The non-elastic locking tooth is a non-elastic locking tooth that is directly generated on the upper surface of the gasket (3). The number of locking teeth (10) is one or several. When several are set, the locking teeth (10) are radially and evenly distributed on the upper surface of the gasket (3).

3. The anti-loosening and anti-theft fastening assembly, the through hole, washer, clamping bolt, and toothed bolt on the fastener as described in claim 1 or 2, is characterized in that... The vertical tooth surface (102) of the toothed plate (3) is inclined at 1°-15° toward the loosening direction of the nut (2); and / or the vertical groove wall (141) on the nut (2) is inclined at 1°-15° toward the loosening direction of the nut (2); and / or the vertical groove wall (141) on the nut of the bolt (1) is inclined at 1°-15° toward the loosening direction of the bolt (1).

4. A through hole in a fastener, characterized in that... The inner ring wall of the through hole (5) or screw hole (6) on the fastener (4) is provided with a groove (7) or a recess (8). The through hole (5) refers to a through hole without internal thread on the inner ring wall. The screw hole (6) refers to a through hole or blind hole with internal thread on the inner ring wall. The groove (7) refers to a groove that runs through the entire through hole or screw hole. The groove (7) is parallel to the axis of the through hole (5) or screw hole (6). The recess (8) refers to a short shallow groove on the inner ring wall at the outlet of the through hole (5) or screw hole (6). The through hole (5) or screw hole (6) with groove (7) or recess (8) is called a non-circular hole.

5. A gasket (3), characterized in that The lower surface of the gasket (3) is provided with a retaining strip (9); the upper surface of the gasket (3) is provided with retaining teeth (10), the surface of the retaining teeth (10) includes an inclined tooth surface (101) and a vertical tooth surface (102) that are directly connected by a bend, the vertical tooth surface (102) is perpendicular to the upper surface of the gasket (3), and the inclined tooth surface (101) is inclined to the upper surface of the gasket (3); the retaining teeth (10) are elastic retaining teeth or non-elastic retaining teeth. The elastic retaining teeth are formed by cutting a section of the gasket (3) and bending it upward to form an elastic retaining tooth that extends onto the upper surface of the gasket (3). The non-elastic retaining teeth are non-elastic retaining teeth that are directly generated on the upper surface of the gasket (3); the number of retaining teeth (10) is one or several. When several are provided, the retaining teeth (10) are radially and evenly distributed on the upper surface of the gasket (3).

6. A clamp bolt (1), the bolt (1) comprising a screw (11) and a nut (12) fixedly formed at one end of the screw, characterized in that... A retainer (13) is provided on the end of the screw (11) at the connection position between the nut (12) and the screw (11). One side of the retainer (13) is directly generated on the end face of the nut, and the other side of the retainer (13) is directly generated on the end of the screw.

7. A toothed bolt (1), the bolt (1) comprising a threaded rod (11) and a nut (12) fixedly formed at one end of the threaded rod, characterized in that... A plurality of toothed grooves (14) are directly formed on the inner end face of the nut (12) on the bolt (1). The plurality of toothed grooves (14) are radially and evenly distributed on the inner end face of the nut (12). The groove wall of the toothed groove (14) includes a vertical groove wall (141) and an inclined groove wall (142) that are directly connected by a bend. The vertical groove wall (141) is perpendicular to the inner end face of the nut (12), and the inclined groove wall (142) is inclined to the inner end face of the nut (12).

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