A double-headed self-clamping anti-loosening and anti-theft fastening component

Abstract

A self-clamping anti-loosening and anti-theft fastening component comprises a bolt, a nut, a gasket and a through hole on a fastened piece; the through hole on the fastened piece is a non-circular through hole, and the two sides of the gasket are respectively provided with clamping strips and clamping teeth of different structures, the nut of the bolt is provided with a clamping bag or a tooth groove, and the nut is provided with a tooth groove, which together constitute a double-headed self-clamping or single-headed self-clamping anti-loosening and anti-theft fastening component; its beneficial effect is that the non-circular through hole structure combined with the double-sided clamping tooth structure of the gasket and the clamping bag and tooth groove structure of the bolt and nut can well clamp the fastening components to each other, so that only a small clamping force is required to achieve the anti-loosening and anti-theft effect, thereby avoiding the breakage of the screw due to long-term tightening vibration.

Description

Technical Field

[0001] The invention relates to the technical field of anti-loosening fasteners, in particular to a double-headed self-clamping anti-loosening and anti-theft fastening component. Background Art

[0002] Commonly used fastening assemblies include bolt-nut assemblies, stud-nut assemblies, screws, studs, etc., in which the nut is a polygonal cylinder with a central threaded hole, and the inner ring wall of the central threaded hole is provided with an internal thread, which is tightened with the external thread on the stud. The stud is a screw with a bolt head, and the screw is provided with an external thread, which is used to fasten and connect two or more fasteners with through holes.

[0003] After the nut is tightened on the screw, the fastening of the nut and the bolt is generally stable. However, if the fastener is in vibration for a long time, there will be a vibration frequency difference between the connecting parts, which will cause the connecting parts in the connection structure to have a reverse loosening tendency, causing the connection between the nut and the stud to become loose or even fall off.

[0004] For example, for fasteners installed on equipment that often vibrates, such as wind power equipment, truck axles, mining equipment, and lathes, if the torque is too small, the thread friction between the nut and the screw is small, and the anti-loosening condition cannot be achieved. 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 at the tail of the screw is prone to break under frequent vibration conditions. After long-term use on power or communication towers, steel structure bridges, and steel structure workshops, nuts often become loose 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 assembly which does not require the nut to be tightened too much, makes the screw rod not easily broken, and can prevent it from loosening.

[0006] To solve the above technical problems, the technical solution adopted by the present invention is a double-headed self-locking anti-loosening and anti-theft fastening assembly, including bolts, nuts, washers and through holes on the fastened piece; that is, the fastener is fastened at both ends by the nut and nut on the bolt.

[0007] The inner ring wall of the through hole on the fastener is provided with a groove or a recess, the through hole refers to a through hole without an internal thread on the inner ring wall, the groove refers to a groove running through the entire through hole, the groove is parallel to the axis of the through hole, and the recess refers to a non-through shallow short groove arranged on the inner ring wall at the outlet of the through hole; the through hole provided with a groove or a recess is called a non-circular through hole, that is, the 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 a recess on the inner ring wall; one or more grooves or recesses can be provided in the same through hole; the fastener has at least two grooves; the recess is actually a groove at the edge position of the groove, and the structures embedded in the groove in the text can be embedded in the edge position of the groove. For the sake of simplicity, the embedded in the groove or matching with the groove described below is equivalent to embedded in the edge position of the groove or matching with the edge position of the groove; but embedded in the groove does not necessarily mean embedded in the groove, because the groove 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 screw and a nut fixedly generated at one end of the screw, and a card package is provided on the screw end head at the connection position between the nut and the screw, that is, one side of the card package is directly generated on the end face of the nut, and the other side of the card package is directly generated on the screw end head, and the card package is used to be embedded in the groove on the inner ring wall of the non-circular through hole of the fastener or in the edge position of the groove; that is, a card package matching the groove on the inner ring wall of the non-circular through hole is provided on the screw end head at the connection position between the nut and the screw, and one or more card packages can be set, and their number and orientation are the same as the number and orientation of the grooves or recesses in the through hole; the card package bolt is used to match the double-headed self-clamping anti-loosening and anti-theft fastening assembly.

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

[0010] The upper surface of the gasket is provided with a latching tooth to prevent the nut from loosening; the surface of the latching tooth includes an inclined tooth surface and a vertical tooth surface that are directly connected, the vertical tooth surface is perpendicular to the upper surface of the gasket, the inclined tooth surface is inclined to the upper surface of the gasket, and the inclination direction of the inclined tooth surface is opposite to the tightening direction of the internal thread of the nut, that is, the extending supporting direction of the latching tooth abuts against the loosening direction of the internal thread of the nut, so that the nut cannot be loosened but can only be tightened; in the initial non-elastic state, the inclination angle of the inclined tooth surface relative to the upper surface of the gasket is greater than 0° and less than 45°, preferably 1°-30°, and optimally 5°, that is, the preferred angle between the inclined tooth surface and the upper surface of the gasket is 1°-30 °; the latching teeth can be elastic latching teeth or non-elastic latching teeth. The elastic latching teeth are elastic latching teeth that can be elastically compressed and stretched out on the upper surface of the gasket after being cut into a section of the gasket and bent upward. The non-elastic latching teeth are non-elastic latching teeth that are directly generated or welded on the upper surface of the gasket; the number of the latching teeth can be one or several. When several teeth are set, the latching 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°, so that after the tooth surface is engaged with the tooth groove on the matching nut, the nut is even more difficult to loosen.

[0011] A plurality of tooth grooves are directly generated on the end face of one end of the nut, and the plurality of tooth grooves are evenly distributed on the end face of the nut in a radial shape, and the groove walls of the tooth grooves include a vertical groove wall and an inclined groove wall that are directly connected, 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, and 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 tooth groove presses the clamping teeth on the gasket along the tightening direction of the internal thread of the nut, and then makes the vertical tooth surface of the clamping teeth and the vertical groove wall of the tooth groove fit each other, so that the nut 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 optimally 5°, that is, the preferred angle between the inclined groove wall and the end face of the nut is 1°-30°; the vertical groove wall can also be slightly inclined inwardly, that is, the angle between the surface named as the vertical groove wall and the end face of the nut is 90°-60°, so that after engaging with the clamping teeth on the matching gasket, the nut cannot be loosened even more.

[0012] The vertical groove wall on this tooth groove is made absolutely vertical, which means that it can only be tightened but not screwed out, that is, it can prevent the nut and screw from loosening and prevent theft, but it cannot be screwed out to repair the equipment. In order to make the fastener both tightened and screwed out, the vertical tooth surface on the gasket and / or the vertical groove wall on the nut can be slightly inclined, so that the nut can be loosened and removed under a large torque; that is, the vertical tooth surface of the locking tooth on the gasket is inclined by 1°-15° in the direction of loosening the nut, preferably by 5°, that is, the angle between the surface named vertical tooth surface and the upper surface of the gasket is 91°-105°, preferably 95°; and / or the vertical groove wall on the nut is inclined by 1°-15° in the direction of loosening the nut, preferably by 5°, that is, the angle between the surface named 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 by 1°-15° in the direction of loosening the bolt, preferably by 5°, that is, the angle between the surface named as the vertical groove wall and the inner end face of the nut of the bolt is 91°-105°, preferably the angle is 95°.

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

[0014] There are two situations, one is a groove type single-head self-clamping anti-loosening anti-theft fastening component, and the other is a groove type single-head self-clamping anti-loosening anti-theft fastening component.

[0015] The groove-type single-head self-clamping anti-loosening and anti-theft fastening assembly comprises a bolt, a gasket and a through hole on the fastened piece; The fastener includes an upper fastener and a lower fastener, the fastener in contact with the nut on the bolt is called the upper fastener, the lowest fastener is called the lower fastener, and there may be another fastener between the lower fastener and the upper fastener in actual application, and through holes are set as usual; the upper fastener is provided with a through hole, the through hole refers to a through hole without internal threads on the inner ring wall, the through hole is a non-circular through hole, the non-circular through hole refers to a groove on the inner ring wall of a circular hole, and the groove is only set at the outlet of the inner ring wall; the non-circular parts other than the circle in the non-circular through hole are all called grooves; that is, the non-circular through hole is an elliptical through hole, an irregular circular through hole, or an inner ring wall A circular through hole with a groove on it, any one of the three; the groove can be the non-circular part in the elliptical through hole, the non-circular part in the irregular circular through hole, and the groove in the circular through hole with a groove on the inner ring wall; that is, the groove is the groove on the inner ring wall of the through hole, or the irregular part outside the circular through hole in the irregular circular through hole, or the curved tooth-shaped part outside the circular through hole in the elliptical through hole; multiple grooves can also be set at the outlet of the inner ring wall; the lower fastener is provided with a screw hole, and the screw hole refers to a through hole or a blind hole with an internal thread on the inner ring wall, and no groove is set at the outlet of the inner ring wall of the screw hole; that is, in this case, only the outlet of the through hole of the first fastener at the top is provided with a groove.

[0016] The bolt comprises a screw rod and a nut fixedly formed at one end of the screw rod, a plurality of tooth grooves are directly formed on the inner end surface of the nut on the bolt, and the plurality of tooth grooves are evenly distributed on the inner end surface of the nut in a radial shape, and the groove wall of the tooth groove comprises a vertical groove wall and an inclined groove wall directly connected by a turning, the vertical groove wall is perpendicular to the inner end surface of the nut, the inclined groove wall is inclined to the inner end surface of the nut, and the inclined direction of the inclined groove wall is the same as the tightening direction of the external thread of the screw rod on the bolt, that is, the tooth groove tightens the gasket along the tightening direction of the external thread of the screw rod. The latch teeth are pressed tightly, and then the vertical tooth surface of the latch teeth and the vertical groove wall of the tooth groove are fitted with each other, 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 the best is 5°, that is, the preferred angle between the inclined groove wall and the inner end face of the nut is 1°-30°; the vertical groove wall can also be slightly inclined inward, that is, the angle between the surface named as the vertical groove wall and the inner end face of the nut is 90°-60°, so that after the bolt is engaged with the latch teeth on the matching gasket, it is even more impossible to loosen the bolt.

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

[0018] The upper surface of the gasket is provided with a latching tooth to prevent the nut from loosening; the surface of the latching tooth includes an inclined tooth surface and a vertical tooth surface that are directly connected, the vertical tooth surface is perpendicular to the upper surface of the gasket, the inclined tooth surface is inclined to the upper surface of the gasket, and the inclination direction of the inclined tooth surface is opposite to the tightening direction of the internal thread of the nut, that is, the extending supporting direction of the latching tooth abuts against the loosening direction of the internal thread of the nut, so that the nut cannot be loosened but can only be tightened; in the initial non-elastic state, the inclination angle of the inclined tooth surface relative to the upper surface of the gasket is greater than 0° and less than 45°, preferably 1° -30°, the best is 5°, that is, the preferred angle between the inclined tooth surface and the upper surface of the gasket is 1°-30°; the latching teeth can be elastic latching teeth or inelastic latching teeth. The elastic latching teeth are formed by cutting a section of the gasket and bending it upward to form an elastic latching tooth that can be elastically compressed after being stretched out, and the inelastic latching teeth are directly generated or welded on the upper surface of the gasket; the number of the latching teeth can be one or several. When several teeth are set, the latching teeth are radially and evenly distributed 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°, so that after the teeth are engaged with the tooth grooves on the matching nut, the nut is even more difficult to loosen.

[0019] The grooved single-head self-clamping anti-loosening and anti-theft fastening assembly comprises a bolt, a gasket and a through hole on the fastened piece; 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, the lowest fastener is called the lower fastener, and there may be more than one lower fastener in actual application; all fasteners above the lower fastener are provided with non-circular through holes, the non-circular through holes refer to through holes with grooves on the inner ring wall of the circular hole, and the grooves run through the entire inner ring wall; the non-circular parts other than the circular part of the non-circular through holes are all called grooves; that is, the non-circular through holes are elliptical through holes, irregular circular through holes, or circular through holes with grooves on the inner ring wall. Through hole, any one of the three; the groove can be the non-circular part in the elliptical through hole, the non-circular part in the irregular circular through hole, and the groove in the circular through hole with a groove on the inner ring wall; that is, the groove is the groove on the inner ring wall of the through hole, or the irregular part outside the circular through hole in the irregular circular through hole, or the curved tooth-shaped part outside the circular through hole in the elliptical through hole; a plurality of grooves running through the entire inner ring wall can also be arranged on the inner ring wall; the lower fastener is provided with a screw hole, and the screw hole refers to a through hole or a blind hole with an internal thread on the inner ring wall, and a groove is provided at the outlet of the inner ring wall of the screw hole.

[0020] The bolt comprises a screw rod and a nut fixedly formed at one end of the screw rod, a plurality of tooth grooves are directly formed on the inner end surface of the nut on the bolt, and the plurality of tooth grooves are evenly distributed on the inner end surface of the nut in a radial shape, and the groove wall of the tooth groove comprises a vertical groove wall and an inclined groove wall directly connected by a turning, the vertical groove wall is perpendicular to the inner end surface of the nut, the inclined groove wall is inclined to the inner end surface of the nut, and the inclined direction of the inclined groove wall is the same as the tightening direction of the external thread of the screw rod on the bolt, that is, the tooth groove tightens the gasket along the tightening direction of the external thread of the screw rod. The latch teeth are pressed tightly, and then the vertical tooth surface of the latch teeth and the vertical groove wall of the tooth groove are fitted with each other, 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 the best is 5°, that is, the preferred angle between the inclined groove wall and the inner end face of the nut is 1°-30°; the vertical groove wall can also be slightly inclined inward, that is, the angle between the surface named as the vertical groove wall and the inner end face of the nut is 90°-60°, so that after the bolt is engaged with the latch teeth on the matching gasket, it is even more impossible to loosen the bolt.

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

[0022] The upper surface of the gasket is provided with a latching tooth to prevent the nut from loosening; the surface of the latching tooth includes an inclined tooth surface and a vertical tooth surface that are directly connected, the vertical tooth surface is perpendicular to the upper surface of the gasket, the inclined tooth surface is inclined to the upper surface of the gasket, and the inclination direction of the inclined tooth surface is opposite to the tightening direction of the internal thread of the nut, that is, the extending supporting direction of the latching tooth abuts against the loosening direction of the internal thread of the nut, so that the nut cannot be loosened but can only be tightened; in the initial non-elastic state, the inclination angle of the inclined tooth surface relative to the upper surface of the gasket is greater than 0° and less than 45°, preferably 1° -30°, the best is 5°, that is, the preferred angle between the inclined tooth surface and the upper surface of the gasket is 1°-30°; the latching teeth can be elastic latching teeth or inelastic latching teeth. The elastic latching teeth are formed by cutting a section of the gasket and bending it upward to form an elastic latching tooth that can be elastically compressed after being stretched out, and the inelastic latching teeth are directly generated or welded on the upper surface of the gasket; the number of the latching teeth can be one or several. When several teeth are set, the latching teeth are radially and evenly distributed 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°, so that after the teeth are engaged with the tooth grooves on the matching nut, the nut is even more difficult to loosen.

[0023] A fastener, wherein a groove or a recess is provided on the inner ring wall of a through hole or a screw hole on the fastener, the through hole refers to a through hole without an internal thread on the inner ring wall, the screw hole refers to a through hole or a blind hole with an internal thread on the inner ring wall, the groove refers to a groove running through the entire through hole or screw hole, the groove is parallel to the axis of the through hole or screw hole, and the recess refers to a short shallow groove on the inner ring wall at the exit of the through hole or screw hole; the through hole or screw hole with a groove or a recess is called a non-circular through hole, that is, the 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 a recess provided on the inner ring wall. The groove or recess can be regarded as a non-circular crescent part in an elliptical through hole, a non-circular irregular part in an irregular circular through hole, or a groove or a recess provided on the inner ring wall of a circular through hole; one or more grooves running through the entire inner ring wall can be provided on the inner ring wall; or one or more recesses can be provided at the exit of the inner ring wall.

[0024] A gasket, wherein the contact surface between the gasket and the fastener is called the lower surface, and a clamping strip is provided on the lower surface of the gasket, and the clamping strip is used to be embedded in the groove or recess in the through hole or screw hole on the fastener, so that the gasket cannot rotate left or right; the clamping strip can be provided with one or more; a clamping tooth is provided on the upper surface of the gasket, and the surface of the clamping tooth includes an inclined tooth surface and a vertical tooth surface directly connected, the vertical tooth surface is perpendicular to the upper surface of the gasket, and the inclined tooth surface is inclined to the upper surface of the gasket; when the gasket is used as a gasket for a nut, the inclined tooth surface The inclination direction of the tooth surface is opposite to the tightening direction of the internal thread of the nut, that is, the extending supporting direction of the latch teeth abuts against the loosening direction of the internal thread of the nut, so that the nut cannot be loosened but can only be tightened; when the gasket is used as a gasket for a bolt, the inclination direction of the inclined tooth surface is opposite to the tightening direction of the external thread of the screw on the bolt, that is, the extending supporting direction of the latch teeth abuts against the loosening direction of the external thread of the screw, so that the bolt cannot be loosened but can only be tightened; in the initial non-elastic state, the inclination angle of the inclined tooth surface relative to the upper surface of the gasket is greater than 0° and less than 45°, preferably 1° -30°, the best is 5°, that is, the preferred angle between the inclined tooth surface and the upper surface of the gasket is 1°-30°; the latching teeth can be elastic latching teeth or non-elastic latching teeth. The elastic latching teeth are formed by cutting a section of the gasket and bending it upward to form an elastic latching tooth that can be elastically compressed after being extended, and the non-elastic latching teeth are directly generated or welded on the upper surface of the gasket; The number of the latching teeth can be one or more. When more than one latching teeth are provided, the latching 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°, so that after the teeth are engaged with the tooth grooves on the matching nut or bolt nut, the nut or bolt is even more difficult to loosen.

[0025] A clamp bolt, which includes a screw and a nut fixedly generated at one end of the screw, a clamp is provided on the end head of the screw where the nut and the screw are connected, that is, one side of the clamp is directly generated on the end face of the nut, and the other side of the clamp is directly generated on the end head of the screw, and the clamp is used to be embedded in the inner ring wall groove position in the non-circular through hole of the fastener; one or more clamps can be provided; the clamp bolt is used to match a double-headed self-clamping anti-loosening and anti-theft fastening component.

[0026] A toothed groove bolt, the bolt comprises a screw rod and a nut fixedly formed on one end of the screw rod, a plurality of toothed grooves are directly formed on the inner end face of the nut on the bolt, the plurality of toothed grooves are evenly distributed on the inner end face of the nut in a radial shape, the groove wall of the toothed groove comprises a vertical groove wall and an inclined groove wall directly connected by a turning, the vertical groove wall is perpendicular to the inner end face of the nut, the inclined groove wall is inclined to the inner end face of the nut, and the inclined direction of the inclined groove wall is the same as the tightening direction of the screw external thread on the bolt, that is, the toothed groove is along the tightening direction of the screw external thread The latching teeth on the gasket are pressed tightly, and then the vertical tooth surface of the latching teeth and the vertical groove wall of the tooth groove are fitted together, so that the bolt 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 the best is 5°, that is, the preferred angle between the inclined groove wall and the inner end face of the nut is 1°-30°; the vertical groove wall can also be slightly inclined inward, that is, the angle between the surface named as the vertical groove wall and the inner end face of the nut is 90°-60°, so that after the bolt is engaged with the latching teeth on the matching gasket, it is even more difficult to loosen it.

[0027] A method for making a through hole on a fastener. The through holes on the existing fasteners are all circular through holes. No one has ever thought of making the through holes on the fasteners used for fastening into non-circular through holes. The method for making the through holes on the fasteners into non-circular through holes is to use stamping to make the stamping surface shape of the punching needle used for stamping 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 ray into a non-circular state to make a non-circular through hole.

[0028] A method for installing and using a double-head self-clamping anti-loosening and anti-theft fastening assembly is performed according to the following steps:

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

[0030] S2: The gasket is looped onto the screw rod, and the inner surface of the gasket is closely attached to the fastener on the other side, and the clip on the inner surface of the gasket is embedded in the groove in the through hole of the fastener on the other side.

[0031] S3: Screw the nut onto the screw and make the teeth on the nut clamp onto the teeth on the gasket.

[0032] A method for installing and using a single-head self-clamping anti-loosening and anti-theft fastening assembly, when a through groove is provided on the inner ring wall of the upper fastener, the following steps are followed:

[0033] S1: The clip on the gasket passes through the non-circular through hole of the upper fastener, and the clip is embedded in the groove, and the front end of the clip is embedded in the groove in 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 screw on the bolt into the screw hole of the lower fastener, and make the tooth groove on the nut of the bolt clamp the tooth on the gasket. This operation can completely prevent the bolt from loosening.

[0035] A method for installing and using a single-head self-clamping anti-loosening and anti-theft fastening assembly, when there is no through groove but only a groove on the inner ring wall of the upper fastener, follow the following steps:

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

[0037] S2: Pass the bolt through the non-circular through hole of the upper fastener, then screw the screw on the bolt into the screw hole of the lower fastener, and make the tooth groove on the nut of the bolt clamp the teeth on the gasket. This operation can also prevent the bolt from loosening, but it may cause rotational looseness between the upper fastener and the lower fastener.

[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 a non-through groove is provided in the through hole. A card bag is arranged on the bolt and nut, and the card bag can be embedded in the groove to prevent the bolt and screw from loosening.

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

[0041] (3) A tooth groove is provided on one end face of the nut, and after the tooth groove and the locking teeth are embedded in each other, the nut cannot be loosened.

[0042] (4) In terms of the overall structure, the bolts, nuts, washers and through holes on the fasteners can be locked together to prevent them from loosening, thereby achieving an anti-loosening and anti-theft effect. At the same time, conventional clamping force is not required when tightening, so that excessive shear force will not be generated on the screw, and the screw will not break under long-term vibration.

[0043] (5) A tooth groove is provided on the nut of the bolt. When the tooth groove and the locking teeth are embedded in each other, the bolt cannot be loosened, which is suitable for tightening situations where a nut is not required. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 Schematic diagram of the structure of various situations 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 the card pack bolt structure in which a card pack is set on the nut of the bolt in Example 3.

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

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

[0050] Figure 7 This is a schematic diagram of the exploded structure of the components in the double-headed self-clamping anti-loosening and anti-theft fastening assembly of Example 6.

[0051] Figure 8 This is a schematic diagram of the exploded structure of the components in the single-head self-clamping anti-loosening and anti-theft fastening assembly of Example 8.

[0052] Fig. 9 This is a schematic diagram of the exploded structure of the components in the single-head self-clamping anti-loosening and anti-theft fastening assembly of Example 9.

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

[0054] Fig.11 This is a comparative test curve of commercially available anti-loosening fastener products.

[0055] In the figure: 1. bolt, 2. nut, 3. gasket, 4. fastener, 5. through hole, 6. screw hole, 7. groove, 8. recess, 9. clamping strip, 10. clamping teeth, 101. inclined tooth surface, 102. vertical tooth surface, 11. screw, 12. nut, 13. clamping package, 14. Tooth groove, 141. Vertical groove wall, 142. Inclined groove wall, 41. Upper fastener, 42. Lower fastener. DETAILED DESCRIPTION

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

[0057] The inventor has conducted a long-term investigation and research on fastener devices and found that the screws of fasteners that can prevent loosening are prone to breakage. The screw is not easy to break and is not anti-loosening, such as the double-disc self-locking washer anti-loosening assembly currently used in wind power equipment. When the nut is overtightened and exceeds 50% of the yield force of the screw, the nut, the double-disc self-locking washer and the fastener together form a self-locking structure to prevent loosening. However, long-term observations have found that overtightening will cause the screw to produce slight tensile deformation, and under long-term vibration conditions, it is easy for the stretched position on the screw to break.

[0058] Another example is Japan's Hardlock's double-nut eccentric design. When the two nuts are fully screwed onto the screw, the upper nut and the lower nut form horizontal lines on the screw that are staggered and squeezed, forming a shear force. Under long-term vibration conditions, the screw can easily break at the shear position.

[0059] Another example is the American Spirax nut, which has a 30° bevel cut on the tip of the internal thread to form an anti-loosening fastening. If the pressure applied between the nut and the screw is too small, the bevel thread cannot deform the nut thread, form an extrusion pressure on the screw, and have no anti-loosening effect. When the pressure applied between the nut and the screw is too large, the 30° bevel thread can cause the nut thread to deform, forming an extrusion pressure on the screw, which can achieve an anti-loosening effect. However, due to the excessive torque applied by the nut, the screw will have tensile indentations, and under long-term vibration conditions, it is easy for the screw to break at the location of the tensile indentation.

[0060] In order to prevent the fasteners from loosening and falling off, the industry requires that the nuts must be tightened and exceed 50% of the yield force of the screw. However, through long-term observation and a large number of tests, the inventor found that it cannot be tightened too much. Tightening will cause slight indentations on the screw rod, and it will break after long-term vibration; but if it is not tightened, the nut and screw rod will easily loosen. Therefore, the inventor developed a fastening component that does not need to be tightened too much, which can prevent loosening, prevent theft, and avoid screw breakage. Its structure is as follows:

[0061] Example 1

[0062] A through hole 5 on a fastener 4, i.e., a fastening and mounting hole of the fastener 4, is made. The existing through holes 5 on the fastener 4 are all circular non-threaded through holes or circular internally threaded blind holes. No one has ever thought of making the non-threaded through holes or internally threaded screw holes 6 on the fastener 4 for fastening into non-circular through holes or non-circular internally threaded holes.

[0063] like Figure 1 As shown, in this embodiment, the attachment hole on the fastener 4 is made into a non-circular through hole 5 or a non-circular screw hole. A relatively simple method is to set a groove 7 or a groove 8 on the inner ring wall of the circular through hole or circular screw hole on the existing fastener 4, the through hole 5 refers to a through hole without internal threads on the inner ring wall, the screw hole 6 refers to a through hole or a blind hole with internal threads on the inner ring wall, the groove 7 refers to a groove running through the entire through hole or screw hole, the groove 7 is parallel to the axis of the through hole or screw hole, and the groove 8 refers to a short shallow groove on the inner ring wall at the exit of the through hole 5 or screw hole 6; the through hole 5 or screw hole 6 provided with the groove 7 or the groove 8 is called a non-circular through hole, and the non-circular through hole can be made into an elliptical through hole, an irregular circular through hole, or a through hole with a groove 7 or a groove 8 on the inner ring wall in the application. Any one of the circular through holes of the groove 8; the present embodiment adopts a stamping method to make the stamping surface shape of the punching needle used for stamping the through hole of the fastener into a non-circular and non-rotatable shape, and then stamping is performed to make a through hole 5; or laser cutting, plasma cutting or water jet cutting is adopted to make the cutting path of the cutting ray into a non-circular state to make a non-circular through hole 5 with a groove 7; or a conventional method is adopted to make a circular through hole 5 or a screw hole 6, and then a short shallow groove 8 is dug on the inner ring wall of the outlet edge of the through hole 5 or the screw hole 6; the present embodiment only sets a groove 7 in the through hole 5, and only sets a groove 8 in the screw hole 6, and two or more grooves 7 or grooves 8 can also be set.

[0064] Example 2

[0065] like Figure 2 , Figure 3 As shown, a gasket 3 is manufactured, and the contact surface between the gasket 3 and the fastener 4 is called the lower surface. A clamping strip 9 is provided on the lower surface of the gasket 3. In this embodiment, the edge of the center circle of the gasket 3 is directly connected to the lower surface in a vertical direction to generate the clamping strip 9, so that it is convenient to embed the clamping strip into the groove 7. The clamping strip 9 protruding downward can also be directly generated on the lower surface of the gasket 3; the clamping strip 9 can be provided with one or more. As long as the size and position match the groove 7 , in this embodiment, a clip strip 9 is provided on the lower surface of the gasket 3 .

[0066] Then, a latch tooth 10 is arranged on the upper surface of the gasket 3, and the surface of the latch tooth 10 includes an inclined tooth surface 101 and a vertical tooth surface 102 which are directly connected, 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 latch tooth 10 can be an elastic latch tooth or a non-elastic latch tooth. The elastic latch tooth is a structure in which the gasket 3 is cut into a section and bent upward to form an inclined shape extending above the upper surface of the gasket. It is an elastic latch tooth that can be elastically compressed back, and the non-elastic latch tooth is directly generated or welded on the upper surface of the gasket; the number of the latch teeth 10 can be one or more. When several are arranged, the latch teeth 10 are evenly distributed radially on the upper surface of the gasket 3. In this embodiment, two latch teeth 10 are arranged 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 it is less than 30°. In this embodiment, the angle between the inclined tooth surface 101 and the upper surface of the gasket 3 is set to 5°.

[0067] The gasket 3 can be used as a gasket for the nut 2 or as a gasket for the bolt 1. When the gasket 3 is used as a gasket for the nut 2, the inclination direction of the inclined tooth surface 101 is opposite to the tightening direction of the internal thread of the nut 2, that is, the extending supporting direction of the latch tooth 10 abuts against the loosening direction of the internal thread of the nut 2, so that the nut 2 cannot be loosened but can only be tightened; when the gasket 3 is used as a gasket for the bolt 1, the inclination direction of the inclined tooth surface 101 is opposite to the tightening direction of the external thread of the screw on the bolt 1, that is, the extending supporting direction of the latch tooth 3 abuts against the loosening direction of the external thread of the screw, so that the bolt 1 cannot be loosened but can only be tightened.

[0068] In order to make the fastening assembly achieve better anti-loosening and anti-theft effects, the vertical tooth surface 102 can also be slightly tilted inward. Generally, the angle between the tooth surface named vertical tooth surface 102 and the upper surface of the gasket 3 is made less than 90° and greater than 60°. In this embodiment, the angle is made to 85°. In this way, after the nut 2 or bolt 1 is engaged with the tooth groove on the matching nut 2 or bolt 1, it is even more difficult to loosen the nut 2 or bolt 1.

[0069] In order to enable the fastening assembly to be screwed out and removed for maintenance, the vertical tooth surface 102 may be slightly tilted outwards. In order to loosen and remove the nut 2 under a larger torque; generally, the vertical tooth surface 102 of the locking tooth 10 on the gasket 3 is inclined by 1°-15° in the direction of loosening the nut 2. In this embodiment, the inclination angle is made 5°, that is, the angle between the surface named vertical tooth surface 102 and the upper surface of the gasket 3 is generally made 91°-105°, and in this embodiment, the angle is made 95°; in this way, the nut 2 can be loosened and removed under a larger torque for maintenance.

[0070] Example 3

[0071] like Figure 4 As shown, a bolt 1 is made, and a clamp 13 is set at the vertical connection part of the screw rod 11 and the nut 12 of the bolt 1, one side of the clamp 13 is directly formed on the inner end face of the nut 12, and the other side of the clamp 13 is directly formed on the inner end head of the screw rod 11. This bolt is called a clamp bolt; 13 is used to be embedded in the groove 8 in the inner ring wall of the non-circular through hole 5 of the fastener 4; one or more card packs 13 can be set on the same bolt 1.

[0072] Example 4

[0073] like Figure 5 As shown, a bolt 1 is manufactured, that is, a plurality of tooth grooves 14 are directly generated and set on the inner end face of the nut 12 on the bolt, and the plurality of tooth grooves 14 are evenly distributed on the inner end face of the nut 12 in a radial shape, and the groove wall of the tooth groove 14 includes a vertical groove wall 141 and an inclined groove wall 142 that are directly connected by a turning, 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, and the inclined direction of the inclined groove wall 142 is the same as the tightening direction of the external thread of the screw rod 11 on the bolt 1, that is, when tightening, the tooth groove 14 presses the clamping teeth 10 on the gasket 3 along the tightening direction of the external thread of the screw rod 11, and then makes the clamping teeth 10 on the gasket 3 The vertical tooth surface 102 of the tooth 10 and the vertical groove wall 141 of the tooth groove 14 fit each other, so that the bolt 1 cannot be loosened but can only be tightened; this bolt is called a tooth groove bolt; generally, the inclination angle of the inclined groove wall 142 is made 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 5°; the number of tooth grooves 14 on the nut 12 can be the same as or different from the number of teeth 10 on the gasket 3, but must be an integer multiple of the number of teeth 10, so as to ensure that each tooth 10 on the gasket 3 can mesh with the tooth groove 14 on the nut 12; in this embodiment, twelve tooth grooves 14 are arranged on the end face of the nut 12.

[0074] The vertical groove wall 141 can also be slightly inclined inward, that is, the angle between the surface named vertical groove wall 141 and the inner end surface of the nut 12 is generally made 90°-60°. In this embodiment, the angle is made 85°, so that after the bolt is engaged with the locking teeth 10 on the matching gasket 3, it is even more difficult to loosen.

[0075] In order to enable the fastening assembly to be screwed out and removed for maintenance, the vertical groove wall 141 may be slightly tilted outward. In order to loosen and remove the bolt 1 under a large torque; generally, the vertical groove wall 141 of the tooth groove 14 on the nut 12 The screw rod 11 is tilted 1°-15° in the loosening direction. In this embodiment, the tilt is made 5°, that is, the angle between the surface named vertical groove wall 141 and the inner end surface of the nut 12 is generally made 91°-105°, and in this embodiment, the angle is made 95°; in this way, the bolt 1 can be loosened and removed under a large torque for maintenance.

[0076] Example 5

[0077] A nut 2 is manufactured, that is, a plurality of tooth grooves 14 are directly generated and set on one end surface of the existing nut 2. The plurality of tooth grooves 14 are evenly distributed radially around the screw hole on the end face of the nut 2, and the groove wall of the tooth groove 14 includes a vertical groove wall 141 and an inclined groove wall 142 that are directly connected, the vertical groove wall 141 is perpendicular to the side end face of the nut, and the inclined groove wall 142 is inclined to the side end face of the nut, and the inclined 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 tooth groove 14 presses the clamping tooth 10 on the gasket 3 along the tightening direction of the internal thread of the nut, and then makes the vertical tooth surface 102 of the clamping tooth 10 and the tooth groove 1 The vertical groove walls 141 of the nut 2 are fitted together, so that the nut 2 cannot be loosened but can only be tightened; the inclination angle of the inclined groove wall 142 is generally made 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 5°; the number of tooth grooves 14 on the nut 2 and the number of teeth 10 on the gasket 3 can be the same or different, but must be an integer multiple of the number of teeth, so that each tooth 10 on the gasket 3 can mesh with the tooth groove 14 on the nut 2; in this embodiment, twelve tooth grooves 14 are arranged on the end face of the nut.

[0078] The vertical groove wall 141 can also be slightly inclined inward. Generally, the angle between the surface named as the vertical groove wall 141 and the end face of the nut is made to be 90°-60°. In this embodiment, the angle is made to be 85°, so that after the nut 2 is engaged with the locking teeth 10 on the matching gasket 3, it is even more difficult to loosen.

[0079] In order to enable the fastening assembly to be screwed out and removed for maintenance, the vertical groove wall 141 can also be slightly tilted outward so that the nut 2 can be loosened and removed under a large torque; the vertical groove wall 141 of the tooth groove 14 on the nut 2 is generally tilted 1°-15° in the direction of loosening the nut, and in this embodiment it is tilted 5°, that is, the angle between the surface named vertical groove wall 141 and the end face of the nut is generally made 91°-105°, and in this embodiment the angle is made 95°; In this way, the nut 2 can be loosened and removed under a larger torque to facilitate maintenance.

[0080] Example 6

[0081] like Figure 7 As shown, a double-headed self-clamping anti-loosening and anti-theft fastening assembly is manufactured, which includes a bolt 1, a nut 2, a gasket 3 and a through hole 5 on a fastened member 4.

[0082] A groove 7 or a recessed groove 8 is provided on the inner ring wall of the through hole 5 on the fastener 4. The through hole 5 refers to a through hole without an internal thread on the inner ring wall. The groove 7 refers to a groove running through the entire through hole. The groove 7 is parallel to the axis of the through hole 5. The recessed groove 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 recessed grooves 8 may be provided in the same through hole 5. The fastener 4 has at least two grooves. For ease of production, the present embodiment uses a stamping method to stamp the through hole 5 on the fastener 4, and a through groove 7 is provided on the through hole 5.

[0083] The bolt 1 is a card pack bolt, that is, a card pack 13 is arranged on the screw end at the connection position between the nut 12 and the screw 11, one side of the card pack 13 is directly generated on the end face of the nut, and the other side of the card pack 13 is directly generated on the screw end, and the card pack 13 matches the size of the groove 7 in the through hole 5 of the fastener 4, so that the card pack 13 can be embedded in the groove 7 on the inner ring wall at the exit position of the through hole 5 of the fastener 4. Here, the card pack 13 is set to one.

[0084] A clamping strip 9 is arranged on the lower surface of the gasket 3, and the size of the clamping strip 9 matches the groove 7 in the through hole 5 of the fastener 4, so that the clamping strip 9 can be embedded in the groove 7; two clamping teeth 10 are arranged on the upper surface of the gasket 3; the two clamping teeth 10 are located on the diameter extension line on the upper surface of the gasket 3; the surface of the clamping teeth 10 includes an inclined tooth surface 101 and a vertical tooth surface 102 that are directly connected, the vertical tooth surface 102 is perpendicular to the upper surface of the gasket 3, the inclined tooth surface 101 is inclined to the upper surface of the gasket 3, and the inclination direction of the inclined tooth surface 101 is opposite to the tightening direction of the internal thread of the nut 2, and at the initial In the non-spring-loaded state, the inclined tooth surface 101 is generally made to have an inclination angle greater than 1° and less than 30° relative to the upper surface of the gasket 3, and is made to be 5° in this embodiment; the latch tooth 10 can be an elastic latch tooth or a non-elastic latch tooth. In this embodiment, it is made into an elastic latch tooth, that is, the gasket 3 is cut along the diameter line and the circular line on the gasket surface to form a small piece connected to the gasket 3, and then the small piece is bent upward to form an elastic latch tooth that extends out from the upper surface of the gasket 3 and can be resiliently compressed. In this embodiment, two latch teeth 10 are arranged on the gasket 3, and the two latch teeth 10 are respectively arranged on the diameter line on the upper surface of the gasket 3.

[0085] A plurality of tooth grooves 14 are directly generated on the end face of one end of the nut 2, and the plurality of tooth grooves 14 are evenly distributed on the end face of the nut 2 in a radial shape. The groove walls of the tooth grooves 14 include a vertical groove wall 141 and an inclined groove wall 142 that are directly connected. 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 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°. There are twelve tooth grooves 14 on each nut 2.

[0086] The through hole 5 on the fastener 4, the bolt 1, the nut 2 and the gasket 3 together form a double-headed self-clamping anti-loosening and anti-locking When installing and using the fastening assembly, follow the steps below:

[0087] S1: Insert the bolt 1 into the through hole 5 of the fastener 4, so that the card package 13 on the screw end of the bolt 1 is embedded in the groove 7 in the through hole 5 of the fastener, and the screw tail end of the bolt 1 passes through all the fasteners 4 and extends out of all the through holes 5 of the fasteners 4 and is exposed outside the other side surface of all the fasteners 4.

[0088] S2: The gasket 3 is looped onto the screw 11, and the inner surface of the gasket 3 is closely attached to the fastener 4 on the other side, and the clip 9 on the inner surface of the gasket 3 is embedded in the groove 7 in the through hole 5 of the fastener 4 on the other side.

[0089] S3: Screw the nut 2 onto the screw rod 11, and make the tooth groove 14 on the nut 2 clamp the locking teeth 10 on the gasket 3; The final tightening does not need to be too tight, and only needs to reach 20%-50% of the existing standard clamping force. Since it does not need to be too tight, the screw rod 11 will basically not break.

[0090] This structure in which the nut 12 and the nut 2 on the bolt 1 fasten the fastener 4 at both ends during installation and use is called a double-headed self-clamping anti-loosening and anti-theft fastening assembly.

[0091] Example 7

[0092] In the above-mentioned embodiment 6, the vertical groove wall 141 on the tooth groove 14 on the nut 2 is vertical, which means that it can only be tightened but not screwed out, that is, it can prevent the nut and screw from loosening and prevent theft, but it cannot be screwed out to repair the equipment. In order to make the fastener both tightened and anti-loose and screwed out, the vertical tooth surface 102 on the gasket 3 is slightly tilted in this embodiment, or the vertical groove wall 141 on the nut 2 is slightly tilted, or the vertical tooth surface 102 and the vertical groove wall 141 are slightly tilted at the same time, so that the nut 2 can be loosened and removed under a large torque; generally, the locking tooth 102 on the gasket 3 is slightly tilted. The vertical tooth surface 102 of the nut 2 is inclined by 1°-15° toward the direction of loosening the nut, and in this embodiment, it is inclined by 5°, that is, the angle between the surface named vertical tooth surface 102 and the upper surface of the gasket 3 is generally 91°-105°, and in this embodiment, it is made to be 95°; the vertical groove wall 141 on the nut 2 is generally inclined by 1°-15° toward the direction of loosening the nut 2, and in this embodiment, it is inclined by 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 embodiment, it is made to be 95°. In this way, the nut 2 can be screwed out with force for disassembly and maintenance.

[0093] Example 8

[0094] like Figure 8 As shown, a single-head self-clamping anti-loosening and anti-theft fastening assembly is made, including a bolt 2, a gasket 3 and a through hole 5 on a fastened member 4.

[0095] The fastened member 4 includes an upper fastened member 41 and a lower fastened member 42, the fastened member 4 that contacts the nut 12 on the bolt 1 is called the upper fastened member 41, and the lowest fastened member is called the lower fastened member 42; the upper fastened member 41 is provided with a through hole 5, the through hole 5 refers to a through hole 5 without an internal thread on the inner ring wall, and the inner ring wall of the through hole is provided with a groove 7 that runs through 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 fastened member 42 is provided with a screw hole 6, the screw hole 6 refers to a through hole or a blind hole with an internal thread on the inner ring wall, and the outlet of the inner ring wall of the screw hole 6 is provided with a groove 8, and the groove 8 refers to a shallow short groove that does not run through the inner ring wall.

[0096] A plurality of tooth grooves 14 are directly generated on the inner end face of the nut 12 on the bolt 1, and the plurality of tooth grooves 14 are radially and evenly distributed on the inner end face of the nut 12. The groove wall of the tooth groove 14 includes a vertical groove wall 141 and an inclined groove wall 142 that are directly connected. 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 screw on the bolt 1; generally, the inclination angle of the inclined groove wall 142 is made 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 5°.

[0097] A clamping strip 9 is provided on the lower surface of the gasket 3, and the clamping strip 9 matches the groove 7 in the through hole 5 and the groove 8 in the screw hole 6, so that the clamping strip 9 can be embedded in the groove 7 and the groove 8, so that the gasket 3 cannot rotate. The clamping strip 9 on the gasket 3 can be provided with one or more; in this embodiment, one clamping strip 9 is provided; the length of the clamping strip 9 is equal to the thickness of the upper fastener 41, that is, the length of the groove 7 plus the length of the groove 8 on the lower fastener 42, or is less than the length of the groove 7 on the upper fastener 41 plus the length of the groove 8 on the lower fastener 42 but greater than the length of the groove 7 on the upper fastener 41.

[0098] A latching tooth 10 is provided on the upper surface of the gasket 3; the surface of the latching tooth 10 includes an inclined tooth surface 101 and a vertical tooth surface 102 which are directly connected by a turning point, the vertical tooth surface 102 is perpendicular to the upper surface of the gasket 3, the inclined tooth surface 102 is inclined to the upper surface of the gasket 3, and the inclination direction of the inclined tooth surface 102 is opposite to the tightening direction of the internal thread of the nut 2; the latching tooth 10 is an elastic latching tooth, which is formed by cutting a section of the gasket and bending it upward to form an elastic latching tooth that can be elastically compressed back after extending; the number of the latching teeth 10 can be one or more, and two latching teeth 10 with the center of the gasket as the symmetry point are provided here.

[0099] The through hole 5, bolt 1 and gasket 3 on the fastener together form a single-head self-clamping anti-loosening and anti-theft fastening assembly. When installing and using, follow the steps below:

[0100] S1: The clamping 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 clamping strip 9 is embedded in the groove 8 in the screw hole 6 of the lower fastener 42 .

[0101] S2: The bolt 1 is passed through the non-circular through hole 5 of the upper fastener 41, and then the screw rod 11 on the bolt 1 is screwed into the screw hole 6 of the lower fastener 42, and the tooth groove 14 on the nut 12 of the bolt 1 is clamped with the clamping teeth 10 on the gasket 3. This operation can completely prevent the bolt from loosening; that is, the structural component in which the nut 12 on the bolt 1 fastens the fastener 4 at one end is called a single-head self-clamping anti-loosening and anti-theft fastening component.

[0102] Example 9

[0103] like Fig. 9 As shown, another single-head self-clamping anti-loosening and anti-theft fastening assembly is made, including a bolt 1, a gasket 3 and a through hole 5 on the fastener 4.

[0104] The fastened member 4 includes an upper fastened member 41 and a lower fastened member 42, the fastened member in contact with the nut on the bolt 1 is called the upper fastened member 41, and the lowest fastened member is called the lower fastened member 42; the upper fastened member 41 is provided with a through hole 5, the through hole 5 refers to a through hole 5 without an internal thread on the inner ring wall, and a groove 8 is provided at the outlet of the inner ring wall of the through hole 5; one, two or more grooves 8 can be provided on the inner ring wall; in this embodiment, one groove 8 is provided; the lower fastened member 42 is provided with a screw hole 6, the screw hole 6 refers to a through hole or a blind hole with an internal thread on the inner ring wall, and no groove is provided at the outlet of the inner ring wall of the screw hole 6.

[0105] A plurality of tooth grooves 14 are directly generated on the inner end face of the nut 12 on the bolt 1, and the plurality of tooth grooves 14 are radially and evenly distributed on the inner end face of the nut 12. The groove wall of the tooth groove 14 includes a vertical groove wall 141 and an inclined groove wall 142 that are directly connected. 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 screw on the bolt 1; generally, the inclination angle of the inclined groove wall 142 is made 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 5°.

[0106] A clamping strip 9 is provided on the lower surface of the gasket 3, and the clamping strip 9 matches the groove 8 in the through hole 5. The clamping strip 9 can be embedded in the groove 8 to prevent the gasket 3 from rotating. One or more clamping strips 9 can be provided. The length of the clamping strip 9 is equal to the length of the groove 8 in the through hole 5 in the upper fastener 42, or is less than the length of the groove 8.

[0107] A latching tooth 10 is provided on the upper surface of the gasket 3; the surface of the latching tooth 10 includes an inclined tooth surface 101 and a vertical tooth surface 102 which are directly connected by a turning point, the vertical tooth surface 102 is perpendicular to the upper surface of the gasket 3, the inclined tooth surface 102 is inclined to the upper surface of the gasket 3, and the inclination direction of the inclined tooth surface 102 is opposite to the tightening direction of the internal thread of the nut 2; the latching tooth 10 is an elastic latching tooth, which is formed by cutting a section of the gasket and bending it upward to form an elastic latching tooth that can be elastically compressed back after extending; the number of the latching teeth 10 can be one or more, and two latching teeth 10 with the center of the gasket as the symmetry point are provided here.

[0108] The through hole 5 on the fastener 4, the bolt 1 and the gasket 3 together form a single-head self-clamping anti-loosening and anti-theft fastening assembly that only clamps the upper fastener. When installing and using it, follow the following steps:

[0109] S1: The clip strip 9 on the gasket 3 is embedded in the groove 8 in the non-circular through hole 5 of the upper fastener 41 .

[0110] S2: The bolt 1 is passed through the non-circular through hole 5 of the upper fastener 41, and then the screw rod 11 on the bolt 1 is screwed into the screw hole 6 of the lower fastener 42, and the tooth groove 14 on the nut 12 of the bolt 1 is clamped to the clamping teeth 10 on the gasket 3. This operation can also prevent the bolt from loosening, but the upper fastener 41 and the lower fastener 42 may be loosened by rotation.

[0111] Example 10

[0112] In the above-mentioned embodiments 8 and 9, the vertical groove wall 141 on the tooth groove 14 on the nut 12 of the bolt 1 is vertical, which means that it can only be tightened but not screwed out, which can prevent the nut 2 and the screw rod 11 from loosening and prevent theft, but it cannot be screwed out to repair the equipment. In order to make the fastener both tightened and anti-loose and screwed out, the vertical tooth surface 102 on the gasket 3 is slightly tilted in this embodiment, or the vertical groove wall 141 on the nut 12 is slightly tilted, or the vertical tooth surface 102 and the vertical groove wall 141 are slightly tilted at the same time, so that the bolt can be loosened and removed under a large torque; generally, the vertical tooth surface 10 on the gasket 3 is tilted slightly. The straight tooth surface 102 is inclined by 1°-15° in the direction of loosening the nut, and in this embodiment it is inclined by 5°, that is, the angle between the surface named vertical tooth surface 102 and the upper surface of the gasket 3 is generally made to be 91°-105°, and here the angle is made to be 95°; the vertical groove wall 141 on the nut 12 is generally inclined by 1°-15° in the direction of loosening the nut, and in this embodiment it is inclined by 5°, that is, the angle between the surface named vertical groove wall 141 and the end face of the nut is generally made to be 91°-105°, and here the angle is made to be 95°; in this way, force can be applied to screw out the bolt for disassembly and maintenance.

[0113] After comparative testing, the double-head self-clamping anti-loosening and anti-theft fastening assembly made in Example 6 and the Japanese Hardlock double-nut anti-loosening fastening assembly purchased on the market were subjected to a lateral vibration comparative test. The same 24MM model of bolt and nut assembly was used for testing. Under the tenth level of strength and 1000 torque, the test was carried out according to 10,000 vibration cycles. The results showed that the two sets of anti-loosening fastening assemblies purchased on the market were as shown in the comparative test curve. Fig.11 , the screw rod broke at around 4500 and 4800 vibration cycles, while the double-headed self-clamping anti-loosening and anti-theft fastening assembly of the present application is shown in the test curve Fig.10 , the screw rod still works normally after 10,000 vibration cycles. The reason is that the clamping force of the existing anti-loosening fastening components must be very high, such as the comparison test curve Fig.11 The clamping force is always kept above 100kN, otherwise it is easy to loosen, and if it is clamped too tightly, it is easy to cause the screw to break under long-term vibration; however, the present application can be self-fastened in structure, and no large clamping force is required to prevent the nut and screw from loosening, as shown in the test curve Fig.10 , and its clamping force quickly dropped to between 50kN and 80kN. Although the clamping force is small, it can still maintain the necessary fastening strength. A small clamping force can avoid the breakage of the screw, and the weak overcomes the strong. It can be seen that the present application adopts a non-circular through hole structure combined with a double-sided tooth structure of the gasket and a card bag and tooth groove structure of the bolt and nut, which can well clamp the fastening components to each other, so that only a small clamping force is needed to achieve the effect of anti-loosening and anti-theft, thereby avoiding the breakage of the screw due to long-term fastening vibration.

Claims

1. A double-headed self-clamping anti-loosening and anti-theft fastening assembly, comprising a bolt (1), a nut (2), a gasket (3) and a through hole (5) on a fastened member (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 recessed groove (8); the through hole (5) refers to a through hole without an internal thread on the inner ring wall; the groove (7) refers to a groove running through the entire through hole; the groove (7) is parallel to the axis of the through hole (5); the recessed groove (8) refers to a shallow short groove arranged on the inner ring wall at the outlet of the through hole (5); the through hole (5) provided with the groove (7) or the recessed groove (8) is called a non-circular through hole; The bolt (1) comprises a screw rod (11) and a nut (12) fixedly formed at one end of the screw rod, a clamp (13) being provided on the end of the screw rod at the connection position between the nut (12) and the screw rod (11), the clamp (13) being used to be embedded in a groove (8) on the inner ring wall of a non-circular through hole of a fastener (4) or in an edge position of a groove (7); A clamping strip (9) is provided on the lower surface of the gasket (3), and the clamping strip (9) matches the groove (8) in the non-circular through hole; a clamping tooth (10) is provided on the upper surface of the gasket (3); the surface of the clamping tooth (10) comprises 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), the inclined tooth surface (101) is inclined to the upper surface of the gasket (3), and the inclined tooth surface (101) is inclined to the upper surface of the gasket (3). ) is in an inclination direction opposite to the tightening direction of the internal thread of the nut (2); the latching teeth (10) are elastic latching teeth or non-elastic latching teeth, the elastic latching teeth are elastic latching teeth formed by cutting a section of the gasket and bending it upward to extend it on the upper surface of the gasket, and the non-elastic latching teeth are non-elastic latching teeth directly generated on the upper surface of the gasket; the number of the latching teeth (10) is one or more, and when a plurality of the latching teeth are provided, the latching teeth (10) are evenly distributed radially on the upper surface of the gasket (3); A plurality of tooth grooves (14) are directly formed on the end surface of one end of the nut (2), and the plurality of tooth grooves (14) are evenly distributed on the end surface of the nut (2) in a radial shape. The groove walls of the tooth grooves (14) include a vertical groove wall (141) and an inclined groove wall (142) that are directly connected in a turning manner. The vertical groove wall (141) is perpendicular to the end surface of the nut (2), and the inclined groove wall (142) is inclined to the end surface 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 single-head self-clamping anti-loosening and anti-theft fastening assembly, comprising a bolt (1), a gasket (3) and a through hole (5) on a fastened member (4); characterized in that The fastened member (4) comprises an upper fastened member (41) and a lower fastened member (42), wherein the fastened member (4) in contact with the nut (12) on the bolt (1) is referred to as the upper fastened member (41), and the lowest fastened member is referred to as the lower fastened member (42); the upper fastened member (41) is provided with a through hole (5), wherein the through hole (5) refers to a hole without internal threads on the inner ring wall, wherein the inner ring wall of the through hole (5) is provided with a groove (7), wherein the groove (7) runs through the entire inner ring wall, or wherein the inner ring wall of the through hole (5) is provided with a groove (8), wherein the groove (8) is only provided at the outlet of the inner ring wall; the lower fastened member (42) is provided with a screw hole (6), wherein the screw hole (6) refers to a through hole (5) or a blind hole with internal threads on the inner ring wall, wherein the screw hole (6) is provided with a screw thread on the inner ring wall. The outlet of the inner ring wall of the hole (6) is provided with a groove (8) or no groove (8); the bolt (1) comprises a screw rod (11) and a nut 12 fixedly formed on one end of the screw rod; a plurality of tooth grooves (14) are directly formed on the inner end surface of the nut (12) on the bolt (1); the plurality of tooth grooves (14) are evenly distributed on the inner end surface of the nut (12) in a radial shape; the groove wall of the tooth groove (14) comprises a vertical groove wall (141) and an inclined groove wall (142) which are directly connected; the vertical groove wall (141) is perpendicular to the inner end surface of the nut (12); the inclined groove wall (142) is inclined to the inner end surface of the nut (12); the inclined direction of the inclined groove wall (142) is the same as the tightening direction of the external thread of the screw rod on the bolt (1); A clip strip (9) is provided on the lower surface of the gasket (3), and the clip strip (9) matches the groove (7) or the groove (8) in the non-circular through hole, and the length of the clip strip (9) is equal to the length of the groove (7) on the upper fastener (41) plus the length of the groove (8) on the lower fastener (42), or is less than the length of the groove (7) on the upper fastener (41) plus the length of the groove (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) has no groove (7) on the inner ring wall but only a short shallow groove (8), the length of the clip strip (9) is equal to or less than the length of the groove (8); A latching tooth (10) is provided on the upper surface of the gasket (3); the surface of the latching tooth (10) comprises an inclined tooth surface (101) and a vertical tooth surface (102) which are directly connected by a turning, the vertical tooth surface (102) being perpendicular to the upper surface of the gasket (3), the inclined tooth surface (101) being inclined to the upper surface of the gasket (3), and the inclination direction of the inclined tooth surface (101) being opposite to the tightening direction of the internal thread of the nut (2); the latching tooth (10) is an elastic latching tooth or a non-elastic latching tooth; the elastic latching tooth is an elastic latching tooth formed by cutting a section of the gasket (3) and bending it upward to extend it on the upper surface of the gasket (3); the non-elastic latching tooth is a non-elastic latching tooth directly generated on the upper surface of the gasket (3); the number of the latching teeth (10) is one or more, and when more than one latching tooth is provided, the latching teeth (10) are evenly distributed radially on the upper surface of the gasket (3).

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

4. A gasket (3), characterized in that A clamping strip (9) is provided on the lower surface of the gasket (3); a clamping tooth (10) is provided on the upper surface of the gasket (3); the surface of the clamping tooth (10) comprises an inclined tooth surface (101) and a vertical tooth surface (102) which are directly connected by a turning, the vertical tooth surface (102) being perpendicular to the upper surface of the gasket (3), and the inclined tooth surface (101) being inclined to the upper surface of the gasket (3); the clamping tooth (10) is an elastic clamping tooth or a non-elastic clamping tooth; the elastic clamping tooth is an elastic clamping tooth formed by cutting a section of the gasket (3) and bending it upward to extend it and then extending it on the upper surface of the gasket (3); the non-elastic clamping tooth is a non-elastic clamping tooth directly generated on the upper surface of the gasket (3); the number of the clamping teeth (10) is one or more; when more than one clamping tooth is provided, the clamping teeth (10) are evenly distributed radially on the upper surface of the gasket (3).

5. A card package bolt (1), the bolt (1) comprising a screw rod (11) and a nut (12) fixed to one end of the screw rod, characterized in that A card package (13) is provided on the end of the screw rod (12) at the connection position between the nut (12) and the screw rod (11), one side of the card package (13) is directly formed on the end face of the nut, and the other side of the card package (13) is directly formed on the end of the screw rod.

6. A toothed bolt (1), comprising a screw rod (11) and a nut (12) fixed to one end of the screw rod, characterized in that A plurality of tooth grooves (14) are directly formed on the inner end surface of the nut (12) on the bolt (1), and the plurality of tooth grooves (14) are evenly distributed on the inner end surface of the nut (12) in a radial shape. The groove walls of the tooth grooves (14) include a vertical groove wall (141) and an inclined groove wall (142) that are directly connected by a turning point. The vertical groove wall (141) is perpendicular to the inner end surface of the nut (12), and the inclined groove wall (142) is inclined to the inner end surface of the nut (12).

7. The fastening assembly according to claim 1 or 2, characterized in that The vertical tooth surface (102) of the locking tooth on the gasket (3) is inclined by 1°-15°, preferably by 5°, in the direction of loosening the nut (2); and / or the vertical groove wall (141) on the nut (2) is inclined by 1°-15°, preferably by 5°, in the direction of loosening the nut (2); and / or the vertical groove wall (141) on the nut of the bolt (1) is inclined by 1°-15°, preferably by 5°, in the direction of loosening the bolt (1).

8. A method for making a through hole on a fastener, characterized in that The punching surface of the punching needle used for punching the through hole of the fastener is made into a non-circular, non-rotatable shape by stamping, or the cutting path of the cutting ray is made into a non-circular state by laser cutting, plasma cutting or water jet cutting to make a non-circular through hole.

9. The double-head self-clamping anti-loosening and anti-theft fastening assembly according to claim 1, characterized in that To install and use, follow the steps below: S1: inserting the bolt (1) into the through hole of the fastener, so that the clamp on the screw end of the bolt (1) is embedded in the groove in the through hole of the fastener, and the screw tail of the bolt (1) passes through all the fasteners and extends out of the through holes of all the fasteners and is exposed outside the other side surface of all the fasteners; S2: The gasket (3) is screwed onto the screw rod, and the inner surface of the gasket (3) is closely attached to the fastener on the other side, and the clip on the inner surface of the gasket (3) is embedded in the groove in the through hole of the fastener on the other side; S3: Screw the nut (2) onto the screw rod and make the teeth on the nut (2) clamp onto the teeth on the gasket (3).

10. The single-head self-clamping anti-loosening and anti-theft fastening assembly according to claim 2, characterized in that To install and use, follow the steps below: S1: The clip on the gasket (3) passes through the non-circular through hole of the upper fastener, and the clip is embedded in the groove, and the front end of the clip is embedded in the groove in the screw hole of the lower fastener; S2: The bolt (1) is passed through the non-circular through hole of the upper fastener, and then the screw on the bolt (1) is screwed into the screw hole of the lower fastener, and the tooth groove on the nut of the bolt (1) is clamped with the clamping teeth on the gasket (3).

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