Double bevel stacked lock nut

Abstract

This invention relates to a double-beveled anti-loosening nut, providing a simple, reasonable, more reliable, and easy-to-process and install anti-loosening nut. It includes a pressure nut and a clamping seat. The threaded hole of the pressure nut and the shaft hole of the clamping seat are through holes aligned in the same direction. The lower end face of the pressure nut has an upper bevel, and the upper end face of the clamping seat has a lower bevel, with the two bevels in contact. One of the lower end face of the pressure nut and the upper end face of the clamping seat has a guide protrusion protruding along the line connecting the highest and lowest points of the bevels, while the other bevel has a corresponding guide groove recessed. In use, the guide protrusion is within the guide groove. When the pressure nut is rotated and tightened, the two corresponding bevels press and slide against each other, causing the pressure nut and the clamping seat to deviate from the screw axis in opposite directions until the threads of the pressure nut and the screw are fully engaged and tightened on one side. The inner wall of the clamping seat shaft hole presses against the other side of the screw thread, thus achieving the anti-loosening effect.

Description

Technical Field

[0001] This invention relates to the field of machinery, and in particular to a double-beveled superimposed anti-loosening nut. Background Technology

[0002] Regarding nut anti-loosening technology, a typical example is the anti-loosening nut assembly produced by the Japanese nut manufacturer Hardlock Industries, Ltd., with Chinese patent number CN1349056A. It consists of two nuts, one with a convex cone and the other with a concave cone. One of the convex and concave cones is eccentrically positioned. During use, when tightened, the two nuts misalign, thus gripping the screw and preventing loosening. While this method has advantages, it has disadvantages: First, it requires extremely high machining precision, significantly increasing costs; second, the convex and concave cones only have a small, localized contact, resulting in a weak anti-loosening force. The problems are: 1. The tension is concentrated at a small point. During use, the clamping force of the inner threads of the upper and lower nuts engaging with the outer threads of the screw is only generated locally, increasing local stress and affecting the anti-loosening effect. 2. When tightening the second nut, the tightening force of the tool used must be very precise. Insufficient tightening force will not achieve the anti-loosening effect, while excessive tightening force can easily cause local wear at the contact point between the convex and concave cones, losing the anti-loosening function. Therefore, the instruction manual stipulates that on-the-job training is required before use. 3. With repeated use, the anti-loosening effect will be reduced due to wear from previous use. 4. After tightening the pressure nut, it is inconvenient to adjust the lower nut. 5. This anti-loosening nut assembly requires the screw to be installed first, followed by the nut, which cannot meet the requirement of installing the nut first. 6. It requires two assembly steps: installing the lower nut first and then the pressure nut, which wastes time. 7. During production and use, the nut assembly needs to be paired in pairs. Ninth, if the lower nut of one of the two screws is tightened first, it cannot be guaranteed that the axis of the nut and the screw rod are aligned, and there may be a deviation. When the upper nut is installed, its concave cone cannot be accurately fitted onto the convex cone of the lower nut, thus failing to prevent loosening, and the lower nut needs to be reinstalled. In short, production is time-consuming and labor-intensive, and it is also very troublesome to use. Summary of the Invention The purpose of this invention is to address the shortcomings of existing nuts in anti-loosening technology and provide a simpler, more reasonable, more reliable, and easier-to-process and install anti-loosening nut. This invention is a double-beveled anti-loosening nut, comprising a pressure nut and a clamping seat. The threaded hole of the pressure nut and the shaft hole of the clamping seat are through holes with the same direction. The diameter of the shaft hole of the clamping seat is greater than or equal to the major diameter of the threaded hole of the pressure nut. The two holes are fitted onto a screw passing through the workpiece. The lower end face of the pressure nut is in contact with the upper end face of the clamping seat. In other words, during installation, the extrusion seat is first fitted with the screw, and then the pressure nut is screwed in. The lower end face of the pressure nut has an upper inclined surface, and the upper end face of the extrusion seat has a lower inclined surface. The two inclined surfaces are in contact. One of the lower end face of the pressure nut and the upper end face of the extrusion seat has a guide protrusion protruding in the direction of the line connecting the highest and lowest points of the inclined surfaces. Here, the highest or lowest point refers to the position when the two end faces of the pressure nut or the extrusion seat are facing each other and their respective axes are in the vertical direction. The other inclined surface has a corresponding guide groove recessed in it. In use, the guide protrusion is in the guide groove and can slide along its inner wall. When the pressure nut is turned and tightened, the workpiece begins to prevent the extrusion seat from rotating along the screw thread. If the pressure nut is turned and tightened, the two corresponding inclined surfaces will squeeze and slide against each other. The pressure nut and the extrusion seat will deviate from the screw axis in opposite directions until the threads of the pressure nut and the screw thread are fully engaged and tightened on the corresponding side. The inner wall of the shaft hole of the extrusion seat presses against the other side of the screw thread. The guide protrusions and guide grooves are arranged in pairs, and can be one set or two sets. After installation, they clamp both sides of the screw, thus achieving an anti-loosening effect.

[0003] Furthermore, the upper and lower inclined surfaces are planes or curved surfaces that are inclined relative to their respective axes, and can deviate in opposite directions when they come into contact and are compressed. The curved surfaces here are generally smooth curved surfaces, such as arc surfaces.

[0004] Furthermore, the upper and lower inclined surfaces are provided with protruding dots or ridges. These dots or ridges enhance the resistance to the pressure nut or clamping seat retracting after being squeezed and deviated from its original position; in other words, both inclined surfaces are rough surfaces. The dots or ridges should not protrude too high, otherwise they will obstruct the tightening of the pressure nut.

[0005] Furthermore, the raised strips are parallel, semi-cylindrical strips perpendicular to the direction of the guide protrusions. The semi-cylindrical strips facilitate smooth sliding of the two inclined surfaces when the pressure nut is tightened, and also provide resistance when retracting after tightening. This is a suitable shape choice.

[0006] Furthermore, a connecting member is provided between the pressure nut and the compression seat to integrate the two, which can be a rigid, elastic, or flexible strip-shaped connector. In this case, the connector is arranged along the axial direction, which does not affect its appearance. The connector itself will not be subjected to too much force, and a very thin connecting rod or wire is sufficient. When it is an elastic or flexible material, it will undergo a certain amount of deformation during the tightening of the upper nut without affecting the overall effect. When it is a rigid connector, the movable hole is an elongated hole to allow the rigid connector a certain amount of room to move.

[0007] In a common configuration, both the compression seat and the pressure nut are regular hexagonal prisms of the same size, sequentially mounted on the screw. Their outer surfaces face the same direction. The axis of the threaded hole of the pressure nut is the centerline of the regular hexagonal prism. A plane passing through the axis of the threaded hole of the pressure nut, or through the axis of the compression seat hole, and then through two diagonal edges or perpendicular to two opposite sides, forms the bisecting plane. The upper surface of the compression seat is an upper inclined plane (less than 90 degrees) perpendicular to the bisecting plane and forming an acute angle with its axis. The lower surface of the pressure nut is a lower inclined plane parallel to the upper inclined plane, perpendicular to the bisecting plane, and forming an acute angle with its axis. In use, the two inclined planes are in contact and slide as the pressure nut rotates and tightens, gradually deviating from the screw axis until the internal thread of the pressure nut fully engages with the corresponding side of the screw thread, and the inner side of the compression seat shaft hole abuts against the other side of the screw thread.

[0008] Furthermore, after the pressure nut and the pressing seat are tightened to the screw, the center point of the force on their contacting inclined surfaces is located on or close to the screw thread axis. This ensures that the pressing seat applies uniform pressure to the workpiece or the lower nut.

[0009] Furthermore, the axis of the extrusion seat shaft hole is slightly offset from the center line of the hexagonal prism body. During use, when the pressure nut is tightened, the sides of the pressure nut and the extrusion seat remain aligned. This not only maintains an attractive appearance but also facilitates tool use; for example, when tightened together with a socket wrench, the tool is easier to loosen.

[0010] Furthermore, a lower nut is coaxially located below the extrusion seat. A linkage groove is provided on either the lower end face of the extrusion seat or the upper end face of the lower nut, and a corresponding linkage post is provided on the other end. In use, the linkage post is positioned within the linkage groove. A rotating connection mechanism is provided between the linkage groove and the matching linkage post, allowing them to rotate around an axis. When the pressure nut is tightened, the linkage post and the linkage groove work together to force the lower nut to shift with the extrusion seat, thereby achieving an anti-loosening effect.

[0011] Furthermore, without using the lower nut, the outer side of the lower end of the pressing seat is provided with an enamel disc that is flush with its end face and surrounds its axis, and its lower end face is roughened. When the pressing nut is used with the pressing seat, the lower end face is enlarged and roughened. The enlargement is to increase the contact area between the pressing seat and the workpiece, thereby reducing the pressure on the workpiece. The roughening increases the friction between the two, further enhancing the anti-loosening effect.

[0012] Furthermore, the lower end of the nut has an enamel disc on its outer side, which is flush with its end face and surrounds its axis, and its lower end face is roughened. When the lower nut is used, its lower end face is also enlarged and roughened. Enlarging it increases the contact area between the pressing seat and the workpiece, reducing the pressure on the workpiece. Roughening it increases the friction between the two, further enhancing the anti-loosening effect.

[0013] The beneficial effects of this invention are that it only requires relatively high mechanical precision, not extremely high machining precision, thus saving costs; its anti-loosening force is the resultant force of multiple inclined surfaces acting together, resulting in uniform and stable compression; the double-inclined-surface superimposed anti-loosening nut of this invention can be used in two combinations: one with a pressure nut and a compression seat, which can be used without a lower nut, and the assembly can be installed first, followed by the screw; the other combination is to use it together with the lower nut, which is more reliable in some situations where the surface of the loading nut cannot withstand excessive pressure. The threads of the pressure nut, the lower nut, and the screw thread can all mesh with each other for a tighter fit. When the pressure nut and the extrusion seat are used separately, only the threads of the pressure nut and the screw engage on one side, while the extrusion seat only abuts on the other side. When the surface to which the extrusion seat is loaded is not large enough, it may loosen because the shaft hole of the extrusion seat does not have threads, thus failing to achieve the desired effect. Therefore, a lower nut is required for use in this case. This invention allows the lower nut to be installed first or the pressure nut, extrusion seat, and lower nut to be installed as a whole. When installed as a whole, there is no need for precise installation of the lower nut. Simply use a tool to screw the whole assembly onto the screw. When the lower nut contacts the loading surface, tighten it first, and then tighten the pressure nut. It is convenient to use separately or in combination. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the following description of the drawings is only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a three-dimensional exploded view of the double-beveled anti-loosening nut according to an embodiment of the present invention; Figure 2 for Figure 1A partial schematic diagram of the middle section along the mm direction; Figure 3 for Figure 1 A magnified view of the Q region; Figure 4 for Figure 1 A schematic diagram showing the completed installation on the workpiece; Figure 5 for Figure 4 A partial schematic diagram of the middle section along the mm direction.

[0016] Component markings: Pressure nut 10, Pressure nut thread 11, Pressure nut threaded hole 12, Pressure nut lower end face 13, Upper inclined surface 14, Upper inclined surface protrusion 141, Pressure nut threaded hole axis 15, Fixing hole 16, Guide groove 17, Extrusion seat 20, Extrusion seat shaft hole 21, Extrusion seat shaft hole axis 22, Extrusion seat upper end face 23, Lower inclined surface 24, Lower inclined surface protrusion 241, Guide protrusion 25, Movable hole 26, Extrusion seat lower end face 27, Linkage groove 28, Connecting groove 29, Lower nut 30, Lower nut upper end face 31, Lower nut internal thread 32, Lower nut threaded hole axis 33, Linkage column 34, Connecting flange 35, Connector 40, Screw 50, Screw thread 51, Screw axis 52, Workpiece 60, Pressure nut clearance a, Extrusion seat clearance b, Lower nut clearance c, Force center point v. Detailed Implementation

[0017] The description of the illustrative embodiments of the present invention is intended to be read in conjunction with the accompanying drawings, which form an integral part of the entire written description. Any references or designations to the orientation or direction of parts in the description of the invention disclosed herein (including the claims section) are for convenience of description only and are not intended to limit the scope of the invention. For example, relative terms such as up, down, left, right, inside, outside, far, near, etc., should be understood to refer to the orientation in the accompanying drawings described above.

[0018] like Figures 1 to 5As shown, the present invention is a double-beveled anti-loosening nut, which does not limit the appearance or the type of thread. Here, the example is a standard hexagonal nut, which includes a pressure nut 10 and a pressing seat 20. The threaded hole 12 of the pressure nut and the shaft hole 21 of the pressing seat are through holes with the same direction. The diameter of the shaft hole 21 of the pressing seat is greater than or equal to the major diameter of the threaded hole 12 of the pressure nut. The two holes are fitted onto the screw 50 that passes through the workpiece 60. The lower end face 13 of the pressure nut is aligned with the upper end face 23 of the pressing seat. The lower end face 13 of the pressure nut has an upper inclined surface 14, and the upper end face of the extrusion seat 20 has a lower inclined surface 24. The two inclined surfaces are in contact. One of the lower end face 13 of the pressure nut and the upper end face of the extrusion seat 20 has a guide protrusion 25 protruding along the line connecting the highest and lowest points of the inclined surface. The other inclined surface has a corresponding guide groove 17 recessed. In use, the guide protrusion 25 is located in the guide groove 17 and can slide along its inner wall. When the pressure nut 10 is turned and tightened, the workpiece 60 begins to prevent the extrusion seat 20 from rotating along the screw thread 51. If the pressure nut 10 is turned further, the two corresponding inclined surfaces will press and slide against each other. The pressure nut 10 and the extrusion seat 20 will deviate from the screw 50 axis in opposite directions until the thread 11 of the pressure nut and the corresponding side of the screw thread 51 are fully engaged and tightened. The inner wall of the shaft hole 21 of the extrusion seat abuts against the other side of the screw thread 51. After installation, both sides of the screw 50 are tightened, thereby achieving the anti-loosening effect.

[0019] In the example, the upper inclined surface 14 and the lower inclined surface 24 are planes or curved surfaces that are inclined relative to their respective axes. When the two are pressed together, they can deviate in opposite directions. The inclined surfaces 141 and 241 here are generally smooth curved surfaces, such as arc surfaces or other forms, but it is necessary to ensure that deviation occurs when forces are applied above and below them.

[0020] like Figure 1 and 3 As shown in the example, the upper inclined surface 14 and the lower inclined surface 24 have protruding dots or ridges. These dots or ridges increase the resistance to the pressure nut 10 or the clamping seat 20 retracting after being squeezed and deviated; in other words, both inclined surfaces are rough surfaces. The dots or ridges should not protrude too high, otherwise they will obstruct the tightening of the pressure nut 10. See... Figure 3 The upper inclined protrusion 141 is placed on the lower inclined protrusion 241. Under the action of a downward external force, the upper inclined protrusion 141 can slide downward relative to the lower inclined protrusion 241, while preventing it from retracting upward, thus further enhancing the anti-loosening effect.

[0021] like Figure 1 In this example, the raised strips are parallel, semi-cylindrical strips perpendicular to the direction of the guide protrusion 25. The semi-cylindrical strips facilitate smooth sliding of the two inclined surfaces when the pressure nut 10 is tightened, while also providing resistance during tightening. This is a relatively good shape choice.

[0022] like Figure 1 and 2 As shown in the example, a connector 40 is provided between the pressure nut 10 and the compression seat 20 to connect the two as a whole. This connector can be rigid, elastic, or flexible. In this case, the connector 40 is positioned along the axial direction, without affecting its appearance. The connector 40 itself does not bear excessive force; a very thin connecting rod or wire is sufficient. When it is elastic or flexible, a certain amount of deformation occurs during the tightening of the upper nut, but this does not affect the overall effect. When it is a rigid connector, the movable hole 26 is an elongated hole to allow the rigid connector 40 some room to move. The connector 40 passes through the movable hole 26 and is fixed at both ends to the fixed hole 16. See... Figure 1 The elongated hole of the movable hole 26 here is parallel to the lower inclined surface 24.

[0023] like Figures 1 to 5 As shown in the example of a common nut appearance, both the compression seat 20 and the pressure nut 10 are regular hexagonal prisms of the same size, which are installed on the screw 50 in sequence. The outer sides of both are aligned. The axis 15 of the threaded hole of the pressure nut is the center line of the regular hexagonal prism. The plane passing through the axis 15 of the threaded hole of the pressure nut or the axis of the hole of the compression seat 20 and the two diagonal edges or the two perpendicular sides is the split plane. The upper end face 23 of the compression seat is an upper inclined surface 14 that is perpendicular to the split plane and forms an acute angle with its axis. The lower end face of the pressure nut 10 is a lower inclined surface 24 that is parallel to the upper inclined surface 14, perpendicular to the split plane, and forms an acute angle with its axis. In use, the upper and lower inclined surfaces are in contact and slide as the pressure nut 10 is rotated and tightened, and gradually deviate from the axis of the screw 50 in the opposite direction until the internal thread of the pressure nut 10 is fully engaged with the corresponding side of the screw thread 51, and the inner side of the compression seat shaft hole 21 abuts against the other side of the screw thread 51.

[0024] like Figure 4 As shown in the example, after the pressure nut 10 and the clamping seat 20 are tightened to the screw 50, the center point v of the inclined surface where they contact is located is on or close to the axis of the screw thread 51. Figure 4 The center point of force v causes the pressure nut 10 to press in the middle position of the pressing seat 20, so that the pressure on the workpiece 60 or the lower nut 30 below is balanced.

[0025] like Figure 4 As shown in the example, the axis of the extrusion seat shaft hole 21 is slightly offset from the center line of the hexagonal prism of the body. During use, when the pressure nut 10 is tightened, the sides of the pressure nut and the extrusion seat remain aligned.

[0026] like Figure 1 , Figure 2 , Figure 4 and Figure 5As shown in the example, the axis 22 of the extrusion seat shaft hole is slightly offset from the center line of the hexagonal prism of the body. During use, when the pressure nut 10 is tightened, the sides of the pressure nut 10 and the extrusion seat 20 remain aligned.

[0027] like Figures 1 to 5 As shown, a lower nut 30, with the same thread as the pressure nut 11, is coaxially arranged below the extrusion seat 20. A linkage groove 28 is provided on either the lower end face 27 of the extrusion seat or the upper end face 31 of the lower nut, and a corresponding linkage post 34 is provided on the other end face. In use, the linkage post is positioned within the linkage groove 34. A rotating connection mechanism is provided between the linkage groove 28 and the corresponding linkage post 34, allowing them to rotate around an axis. The lower nut thread 32 has the same parameters as the pressure nut thread 11.

[0028] Depend on Figures 4 to 5 As shown in the example, a rotating connection mechanism (which can take various forms, such as sleeve, snap-fit, or with a limiting block) is provided between the linkage groove 28 and the matching linkage column 34. The rotating connection mechanism has an annular connecting groove 29 at the bottom of the linkage groove 28 and two or more connecting flanges 35 at the top of the linkage column. After the extrusion seat 20 and the lower screw are connected in the direction of the female axis, the connecting flanges 35 enter the connecting groove 29, allowing them to rotate relative to each other and preventing them from separating. This facilitates installation because if the lower nut 30 is installed first, it may not be possible to ensure that its axis coincides with the screw axis 52, and the linkage groove 28 of the extrusion seat 20 is not easily aligned with the linkage column 34. If the two are connected together in advance, the installation trouble is eliminated.

[0029] In this example, a certain gap is maintained between the guide protrusion 25 and the bottom of the guide groove 17 after all the components and screws are tightened.

[0030] See Figures 1 to 5 As shown in the application examples, the above kit is installed on the workpiece in the following ways: First, when the pressure nut 10 and the extrusion seat 20 are separate, the screw 50 is passed through the workpiece 60, then the separate extrusion seat 20 is fitted through it, and the pressure nut 10 is screwed onto the screw 50. Approaching the extrusion seat 20, the corresponding guide protrusion 25 and guide groove 17 are aligned and fitted together. Both are then tightened together with a tool. After tightening, the axis 15 of the threaded hole of the pressure nut and the axis 22 of the shaft hole of the extrusion seat are respectively on both sides of the screw axis 52. Figure 5Second, if the pressure nut 10 and the extrusion seat 20 are connected, simultaneously put them onto the screw 50 and tighten both the pressure nut 10 and the extrusion seat 20 onto the workpiece using a tool. Alternatively, the pressure nut can be tightened separately. Third, if a separate lower nut is required, first tighten it onto the workpiece to a suitable tightness, then install the pressure nut 10 and the extrusion seat 20 using the first two methods. Note that the linkage groove 28 and the linkage column 34 must be aligned and properly fitted. Fourth, if the pressure nut 10, the extrusion seat 20, and the lower nut 30 are integrated, directly tighten this assembly onto the screw 50 using a tool. When the lower nut 30 contacts the workpiece 60, tighten the lower nut 30 to a suitable tightness using a tool, and then tighten the pressure nut 10. After tightening, the axis 15 of the threaded hole of the pressure nut is aligned with the axis 52 of the screw, and the axis 22 of the shaft hole of the extrusion seat is aligned with the axis 34 of the threaded hole of the lower nut. The screws coincide on the other side of the screw axis 52, and the clearances a and c of the pressure nut and lower nut become zero, while the clearance b of the clamping seat is greater than or equal to zero. This ensures that the pressure nut 10 and lower nut 30 clamp the screw 50 from both sides, thereby achieving the purpose of preventing loosening. See [link to relevant documentation]. Figure 5 Unloading them is the reverse of the process described above.

[0031] The above are only a few embodiments of the present invention and are not intended to limit the present invention. Various other embodiments of pressure nuts and compression seats can also be made. Any changes and improvements in shape, component position relationship, etc., made in accordance with the essence, principle and idea of ​​the present invention are included within the scope of this invention.

Claims

1. A double-beveled anti-loosening nut, comprising a pressure nut and a clamping seat, wherein the threaded hole of the pressure nut and the shaft hole of the clamping seat are through holes with the same direction, the diameter of the shaft hole of the clamping seat is greater than or equal to the major diameter of the threaded hole of the pressure nut, the two holes are fitted onto a screw passing through the workpiece, and the lower end face of the pressure nut is in contact with the upper end face of the clamping seat, characterized in that, The lower end face of the pressure nut has an upper inclined surface, and the upper end face of the extrusion seat has a lower inclined surface. The two inclined surfaces are in contact. One of the lower end face of the pressure nut and the upper end face of the extrusion seat has a guide protrusion protruding along the line connecting the highest and lowest points of the inclined surface. The other inclined surface has a corresponding guide groove recessed. In use, the guide protrusion is in the guide groove and can slide along its inner wall. When the pressure nut is rotated and tightened, the workpiece begins to prevent the extrusion seat from rotating along the screw thread. If the pressure nut is rotated further, the two corresponding inclined surfaces will press and slide against each other. The pressure nut and the extrusion seat will deviate from the screw axis in opposite directions until the threads of the pressure nut and the screw thread are fully engaged and tightened on the corresponding side. The inner wall of the shaft hole of the extrusion seat presses against the other side of the screw thread.

2. A double bevel stack nut according to claim 1 wherein, The upper and lower inclined surfaces are planes or curved surfaces that are inclined relative to their respective axes. When the two surfaces are pressed together, they can deviate in opposite directions.

3. A double bevel counter nut according to claim 2, wherein The upper and lower inclined surfaces are provided with protruding dots or strips.

4. The double-beveled anti-loosening nut according to claim 3, characterized in that, The raised strips are semi-cylindrical strips arranged in parallel and perpendicular to the direction of the guide protrusion.

5. A double-beveled anti-loosening nut according to claim 4, characterized in that, A connecting element is provided between the pressure nut and the compression seat to connect the two as a whole. This element can be a rigid, elastic, or flexible strip-shaped connector.

6. The double-beveled anti-loosening nut according to claim 1, characterized in that, Both the extrusion seat and the pressure nut are regular hexagonal prisms of the same size, sequentially mounted on the screw. Their outer surfaces face the same direction. The axis of the threaded hole of the pressure nut is the centerline of the regular hexagonal prism. A plane passing through the axis of the threaded hole of the pressure nut, or through the axis of the extrusion seat hole, and then through two diagonal edges or perpendicular to two opposite sides, forms the dividing plane. The upper end face of the extrusion seat is an upper inclined plane perpendicular to the dividing plane and forming an acute angle with its axis. The lower end face of the pressure nut is a lower inclined plane parallel to the upper inclined plane, perpendicular to the dividing plane, and forming an acute angle with its axis. In use, the two inclined planes are in contact and slide as the pressure nut rotates and tightens, gradually deviating from the screw axis in the opposite direction until the internal thread of the pressure nut fully engages with the corresponding side of the screw thread, and the inner side of the extrusion seat shaft hole abuts against the other side of the screw thread.

7. A double-beveled anti-loosening nut according to claim 6, characterized in that, After the pressure nut and the compression seat are tightened with the screw, the center point of the force on the inclined surface where they contact is located or close to the screw thread axis.

8. A double-beveled anti-loosening nut according to claim 7, characterized in that, The axis of the extrusion seat shaft hole is slightly offset from the center line of the hexagonal prism of the body. During use, when the pressure nut is tightened, the sides of the pressure nut and the extrusion seat remain aligned.

9. A double-beveled anti-loosening nut according to claim 1, characterized in that, The extrusion seat is coaxially provided with a lower nut that has the same thread as the pressure nut below it. One of the lower end face of the extrusion seat or the upper end face of the lower nut is provided with a linkage groove, and the other side is provided with a corresponding linkage column. When in use, the linkage column is located in the linkage groove. A rotating connection mechanism is provided between the linkage groove and the matching linkage column, which is connected and can rotate around the axis.

10. A double-beveled anti-loosening nut according to claim 9, characterized in that, The rotating connection mechanism has an annular connecting groove at the bottom of the linkage groove and two or more connecting flanges at the top of the linkage column. After the extrusion seat and the lower screw are connected in the direction of the parent axis, the connecting flanges enter the connecting groove, can rotate relative to each other and restrict their separation.

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