Wedge clamp type anti-loosening double-nut assembly

Abstract

A wedge clamp type anti-loosening double-nut assembly is composed of a first wedge clamp nut, a double-end wedge clamp petal and a second wedge clamp nut. The two wedge clamp nuts are nuts which are provided with wedge-shaped notches at the edge of the connecting thread hole end of one end face of a common nut, and the distance from the point on the intersecting line of the outer side wall face of each wedge-shaped notch and the plane passing through the axis of the connecting thread to the axis of the connecting thread becomes smaller from the side of the slotted end face of the nut to the interior of the nut. The double-end wedge clamping petal is a double-end wedge-shaped part which is arranged around the fastening screw rod and is attached to the outer cylindrical wall surface, the distance from a point on an intersection line of the outer side wall surface and a plane passing through the axis of the assembly to the axis of the assembly is in a form of increasing from the two end surfaces to the middle, and the double-end wedge clamping petal can be matched with the wedge grooves in the two ends to form a wedge-caulking structure. During fastening, the double-end wedge clamping petal is located between the two wedge clamping nuts with the opposite wedge-shaped notches, the double-end wedge clamping petal is matched with the wedge grooves in the two ends to form a wedge-caulking structure, and the double-end wedge clamping petal clamps the fastening screw through the wedge-caulking effect of the two ends.

Description

Technical Field

[0001] This invention relates to the field of threaded fastener technology, and in particular to a wedge-clamp type anti-loosening double nut assembly consisting of two wedge-clamp nuts and a double-headed wedge clamp. Background Technology

[0002] Threaded fasteners are a common type of fastener. Under vibration conditions, the nuts on these fasteners often loosen, leading to failure of the fastening connection and sometimes even accidents with serious consequences. Therefore, preventing loosening of threaded fasteners is crucial and a technical problem that needs to be solved. Designers have adopted various anti-loosening measures, such as using pins to circumferentially fix the nut and screw, punching deformation points at the threaded ends of the nut and screw, connecting a set of nuts with wire, and bonding the nut and screw with adhesive. Other methods include using Hardlock nuts, snap-fit ​​nuts, nylon insert anti-loosening nuts, metal insert anti-loosening nuts, Tang's double-threaded nuts, Spiral nuts, locking washers, and various patented anti-loosening nuts. Due to the large variety, they will not be listed here. However, none of these methods are perfect. Some still have unsatisfactory anti-loosening effects, and others have shortcomings in reusability, ease of installation and maintenance, and economy. Summary of the Invention

[0003] To address the problem of loosening resistance in threaded fasteners, this invention provides a wedge-clamp type anti-loosening double nut assembly (hereinafter referred to as the assembly).

[0004] The technical solution adopted in this invention is as follows: The wedge-type anti-loosening double nut assembly consists of a first wedge nut 1, a double-headed wedge clamp 2, and a second wedge nut 3. Both wedge nuts are nuts with wedge-shaped grooves 02 at the edge of the connecting thread 01 hole on one end face of a standard nut. The distance from the point on the intersection line between the outer wall of the wedge groove away from the connecting thread axis and the plane passing through the connecting thread axis to the connecting thread axis decreases from the nut end face towards the inside of the nut. The outer wall is the wedge-shaped groove wedging surface 03. The wedge-shaped groove is open and connected to the connecting thread hole and the slotted end face. During tightening, each wall of the wedge-shaped groove and the outer cylindrical wall of the fastening screw 4 form a wedge groove 001 surrounding the fastening screw. The wedging surface of the wedge groove is the wedge-shaped groove wedging surface. The wedge groove can be the entire circumference of the edge of the connecting thread hole. The complete type can also be a type consisting of a segment (a segment covering the entire circumference) and several segments at the edge of the threaded hole. When the wedge groove consists of several segments, the segments can be the same or different, and their size and distribution can be set as needed. The two wedge nuts can be the same or different, but at least one of the wedge nuts must have a wedge groove that is a rotating wedge groove that covers the entire circumference of the edge of the threaded hole and is centered on the axis of the threaded connection. This allows the double-headed wedge clamp that mates with the wedge nut to rotate freely within the wedge groove during the tightening process, ensuring that the two wedge nuts can rotate relative to each other to form a wedge-tight structure with the double-headed wedge clamp. The double-ended wedge clamp is a double-ended wedge-shaped part that surrounds the fastening screw and is attached to the outer cylindrical wall. In the structure, the distance from the point on the intersection line of the outer wall surface away from the component axis (coinciding with the connecting thread axis) and the plane passing through the component axis to the component axis increases from the two end faces towards the middle. It can be adapted to the wedge groove formed by the wedge clamp nut and the connecting screw at both ends to form a wedge-tightening structure. The outer wall surface is the wedge-tightening surface 22 of the double-ended wedge clamp. The number of double-ended wedge clamps can be one or several. When the number of double-ended wedge clamps is several, each double-ended wedge clamp can be the same or different, and the size and distribution can be set as needed. When the end face of the double-ended wedge clamp is claw-shaped, the number of claws at each end can be one or several, and the claws can be the same or different, and the size and distribution can be set as needed. When tightening, the double-ended wedge clamp is located between the two wedge-shaped nuts with opposite wedge-shaped grooves, and is set around the outer cylindrical wall of the fastening screw. This forms a wedge-tightening structure where the double-ended wedge clamp and the two wedge grooves on both sides are adapted to each other. The double-ended wedge clamp clamps the fastening screw through the wedge-tightening action at both ends, forming a wedge-type anti-loosening double nut assembly.

[0005] When in use, the component can have a dust ring 7 between the two wedge nuts. The dust ring is generally made of a non-metallic material with good compressibility.

[0006] The wedging surfaces of two-wedge clamp nuts and double-ended wedge clamps can be of various types, such as: Figures 1 to 11As shown, both the wedge nut and the double-ended wedge clamp have a truncated cone-shaped side surface, which can be a full-sided or partial-sided type; it can be as follows: Figure 12 and Figure 13 As shown, the wedging surface of the two-wedge clamp nut is the side surface of a frustum of a cone, while the wedging surface of the double-headed wedge clamp is a narrow surface formed by pressing the theoretical line of the side surface of the frustum of a ball in the open hole; it can be as follows: Figure 14 and Figure 15 The wedge-tightening surfaces of the two wedge-shaped nuts shown are the lateral surfaces of a frustum of a cone, while the wedge-tightening surfaces of the double-ended wedge clamps are the surfaces formed by the compression of the outer edge of the cylinder with an open central hole. If a double-ended wedge clamp with a wedge-shaped end is used, both the wedge-shaped nuts and the double-ended wedge clamps at that end should be flat. The key is that during tightening, the two wedge-tightening surfaces should be able to fit the wedge-shaped nuts and double-ended wedge clamps to form a wedge-tightening structure.

[0007] To clarify, if either the wedge nut or the double-ended wedge clamp has the wedge-tightening surface characteristic described in this invention, then the other mating part can be pressed into a surface having the wedge-tightening surface characteristic described in this invention. For example... Figure 14 As shown, the double-ended wedge clamp is made into an open cylindrical shape with a central hole. Its outer edge mates with the wedge-shaped groove on the flank of the wedge clamp nut. When the hardness of the double-ended wedge clamp material is sufficiently lower than that of the wedge clamp nut, the outer edge of the cylinder will be compressed and deformed into a surface with the wedge-tightening surface characteristics described in this invention, although the wedge-tightening surface is very small. The components form an assembly conforming to the characteristics of this invention. Conversely, if the wedge-shaped groove of the wedge clamp nut is made into a cylindrical stepped countersunk hole, and the edge of the hole mates with the wedge-tightening surface of the double-ended wedge clamp on the flank of the wedge clamp, when the hardness of the wedge clamp nut material is sufficiently lower than that of the double-ended wedge clamp, the edge of the cylindrical hole will be compressed and deformed into a surface with the wedge-tightening surface characteristics described in this invention, although the wedge-tightening surface is very small. The components still form an assembly conforming to the characteristics of this invention. However, this structure cannot reliably achieve the wedge clamping function and is generally not used. If there are special requirements, the chamfering of the edges will be improved to ensure a good fit between the two wedge-tightening surfaces. For example... Figure 12 As shown, the double-headed wedge clamping surface of the spherical frustum-shaped side of the open hole mates with the wedge-shaped groove of the spherical frustum-shaped side of the wedge clamping nut. Theoretically, a line on the side of the spherical frustum mates with the side surface of the spherical frustum. In reality, the mating line will be compressed to form a narrow wedge clamping surface. Each part still forms an assembly that conforms to the features of this invention.

[0008] The preferred solution is to use two identical wedge-shaped nuts, each with a fully circumferentially distributed truncated conical countersunk hole (hereinafter referred to as a countersunk hole) at the edge of the connecting threaded hole. The side of the truncated cone is the wedge-tightening surface of the wedge-shaped groove. During tightening, each wall of the countersunk hole and the outer cylindrical wall of the fastening screw form a fully circumferentially distributed wedge groove, a rotating body with the connecting thread axis as the axis. The wedge-tightening surface of the wedge groove is the wedge-shaped groove wedge-tightening surface. The double-ended wedge clamp uses a double-ended truncated conical part with an open central hole. The opening 21 is very small, and the side of the truncated cone is its wedge-tightening surface. During tightening, the double-ended wedge clamp is installed between the two wedge-shaped nuts, fitted onto the fastening screw, and inserted into the opposing wedge grooves at both ends, forming an assembly with a wedge-tightening structure at both ends. Figure 1 Components Figure 2 Parts (the first wedge nut and the second wedge nut are the same) and Figure 3 The part drawings shown are component and part drawings of the preferred embodiment. This embodiment features simple shapes and is easy to manufacture, representing the most important form of the invention. Figure 18 This is a fastening structure diagram of this solution assembly with washer 5 and dust seal.

[0009] It is also possible to change the double-headed wedge clamp in the preferred solution from a single part with an open central hole and a double-ended truncated cone shape to several parts in several segments, such as two parts in two segments.

[0010] In the preferred embodiment, the two wedge-tightening surfaces of the wedge-tightening mating can be changed from smooth surfaces to non-smooth surfaces, such as striped surfaces, serrated surfaces, textured surfaces, and dotted surfaces. Only one or both wedge-tightening surfaces can be modified. Modifying the wedge-tightening surface mating increases the difficulty of relative rotation between the wedge-clamp nut and the double-ended wedge. Therefore, if only one end is modified, placing the modified end away from the fastened component 6 can improve the component's anti-loosening performance from the perspective of component anti-loosening principles. If this end is modified to a locked fit, the anti-loosening effect will be even better. If both ends are modified in this way, it is necessary to ensure that one end cannot lock to allow relative rotation between the two wedge-clamp nuts to form a wedge-tightening motion. Since the wedge-tightening surface mating away from the fastened component is always a non-smooth surface mating, this modification improves the component's anti-loosening performance. If the end with the greater clamping force is placed away from the fastened component, the anti-loosening effect will be even better. Figure 4 Components Figure 5 parts and Figure 6 Part, a wedge nut borrowed Figure 2 The part shown is an assembly drawing and part drawing where only one end of the wedge-fitting surface is changed from a smooth surface to a striped surface.

[0011] One approach is to modify one of the two wedge-shaped nuts in the preferred design, changing its wedge-shaped groove from a complete countersunk hole to one composed of a segmented countersunk hole and several segmented countersunk holes. The other wedge-shaped nut remains unchanged, but one end of the double-ended, frustum-shaped, open-center wedge clamp is modified to have several claw-like shapes. The modified wedge-shaped groove of the wedge-shaped nut is then fitted with the modified end of the double-ended wedge clamp to form the assembly. If the modified wedge-fitting end is designed to restrict relative rotation between the double-ended wedge clamp and the wedge-shaped nut, and the modified wedge-shaped nut is positioned away from the fastened component, the assembly's anti-loosening performance can be improved. Figure 7 Components Figure 8 parts and Figure 9 Part, a wedge nut borrowed Figure 2 The component is an assembly drawing and part drawing formed by modifying one of the two wedge-shaped clamping nuts, changing its wedge-shaped groove from a complete countersunk hole to two evenly distributed segmented countersunk holes, and changing one end of the double-headed clamping rod to a two-claw shape, and fitting the modified wedge-shaped groove with the modified end of the double-headed wedge clamping rod.

[0012] The aforementioned modifications cannot be made to both ends of the wedge-clamping surface fit, as this would restrict the relative rotation between the two wedge-clamping nuts, preventing the wedge-clamping motion from forming. The number and size of the claws at one end of the partially segmented countersunk hole and the double-ended wedge clamp are not limited to the evenly distributed two shown in the diagram and the size shown. They can be designed and combined as needed. For example, the wedge-shaped groove of the wedge-clamping nut can be designed with two slots, while one end of the double-ended wedge clamp can be designed with three claws, two of which fit into one wedge-shaped groove. Alternatively, the wedge-clamping nut can be designed with three wedge-shaped grooves, each fitting into one of the three claws at one end of the double-ended wedge clamp. Furthermore, a thin rib can be added radially to the wedge-shaped groove of the complete countersunk hole to form an incomplete large annular wedge-shaped groove, which can still fit into a double-ended wedge clamp with a double-ended conical truncated cone shape and an open central hole.

[0013] One approach is to modify one of the two wedge-shaped nuts in the preferred design, changing its wedge-shaped groove from a complete countersunk hole to a segmented countersunk hole configuration. The other wedge-shaped nut remains unchanged, while the double-ended, truncated cone-shaped wedge clamp with its open center hole is replaced with corresponding segmented components to form the assembly. If the modified wedge-shaped nut's tightening end is designed to restrict relative rotation between the double-ended wedge clamp and the nut, and the modified nut is positioned away from the fastened component, the assembly's anti-loosening performance can be improved. Figure 10 Components and Figure 11 Part, a wedge nut borrowed Figure 8 Part, another wedge nut borrowed Figure 2 The part shown is an assembly drawing and part drawing of one of the two wedge nut clamps, in which the wedge-shaped groove is changed from a complete countersunk hole to two evenly distributed partial countersunk holes, while the other wedge nut remains unchanged. The double-ended wedge clamp with a double-ended conical truncated cone shape with an open central hole is changed from one part to two parts.

[0014] This plan Figure 2 Parts cannot be used Figure 8 The form of the parts would restrict the relative rotation between the two wedge-shaped nuts, preventing a wedge-tight fit. The number, size, and distribution of the stepped countersunk holes in the partial segment type, as well as the number, arrangement, and size of the double-headed wedge clamps, are not limited to the form shown in the diagram and can be designed and combined as needed.

[0015] For ease of management, the connection structures at both ends of the double-ended wedge clamp and the two wedge nuts in the assembly can be designed with grooves and convex ridges, utilizing the elasticity of the open ring of the double-ended wedge clamp to connect the three parts together in a snap-fit ​​structure. For example... Figure 16 As shown in the component diagram, Figure 17 yes Figure 16 The enlarged view of component I shows a preferred design where the double-ended wedge clamp and the two mating wedge nuts are connected by grooves and protruding ridges, utilizing the elasticity of the open ring of the double-ended wedge clamp to connect the three parts together. Alternatively, only one end of the mating can be designed as a connected structure, making the component two parts. The connection structure is not limited to the one shown and can be achieved using additional parts.

[0016] To prevent dust during use, a dustproof ring can be added between the two wedge nuts. For example... Figure 16 The image shown is a front view of the assembly fastening structure with washers and dust rings between the two wedge-shaped nuts.

[0017] The design must ensure that the two wedge nuts and double-ended wedges are properly tightened during use. For example, after the two wedge nuts and double-ended wedges are tightened, there should be a certain gap between the two wedge nuts. If there is no gap between the two wedge nuts, then the two wedge nuts and double-ended wedges may not be properly tightened, and thus will not play a good role in preventing loosening. A reasonable redesign is required.

[0018] The following is a brief explanation of the anti-loosening principle of this invention: The anti-loosening mechanism of this invention mainly targets the loosening caused by the relative rotation of the threaded pair between the nut and the fastening screw (hereinafter referred to as loosening). Structurally, as long as the wedge-shaped nut, which is far from the fastened part, does not experience relative rotation with the fastening screw, it will restrict the loosening of other parts and the entire assembly, thus preventing the assembly from loosening. There are three ways in which the wedge-shaped nut, far from the fastened part, can experience relative rotation with the fastening screw: 1. It acquires loosening torque on its own and loosens; 2. It acquires loosening torque together with the double-ended wedge clamp and loosens; 3. It acquires loosening torque together with the entire assembly and loosens. The first type of loosening requires overcoming the thread friction locking torque of the wedge nut far from the fastened part, plus the wedging friction locking torque between the wedge nut far from the fastened part and the double-ended wedge clamp. The second type of loosening requires overcoming the thread friction locking torque of the wedge nut far from the fastened part, plus the wedging friction locking torque between the wedge nut close to the fastened part and the double-ended wedge clamp, plus the clamping friction locking torque between the double-ended wedge clamp and the fastening screw. The third type of loosening requires overcoming the thread friction locking torque of the wedge nut far from the fastened part, plus the clamping friction locking torque between the double-ended wedge clamp and the fastening screw, plus the thread friction locking torque of the wedge nut close to the fastened part. Because the wedge angle of the wedge clamping surface is generally designed to be very small, the wedge clamping force is relatively large, which means the wedge clamping friction force is relatively large. Structurally, the wedge clamping friction arm of the wedge clamping structure is also large, so the wedge clamping friction locking torque is very large. Furthermore, since the angle between the clamping force and the wedge clamping force of the double-headed wedge clamp is close to 180 degrees, from the force balance analysis, the clamping force and the wedge clamping force are not much different, which means the clamping friction force and the wedge clamping friction force are not much different, and their clamping friction arm is also similar. Therefore, the clamping friction locking torque is also not small. Analysis shows that the first type of loosening not only has a small number of locking torques, but also a small thread friction locking torque. Therefore, it requires the least locking torque to overcome and is the easiest to loosen. However, compared to ordinary nuts, wedge nuts, which are far from the fastened part, have a wedge-clamping structure that increases the wedge force, which in turn increases the wedge-force friction locking torque. The wedge mechanism also increases the stability of the relative positions of the two wedge-clamping parts. Unlike the planar contact between an ordinary nut and the fastened part, it does not produce planar slippage. When the force on the sliding surface is uneven, it is easier to obtain a loosening torque, making it more difficult to obtain a loosening torque than an ordinary nut. Therefore, it has much better anti-loosening performance than an ordinary nut. The second type of loosening, similarly, also has a large locking torque to overcome due to the increased stability of the two wedge-clamping parts caused by the wedge mechanism, making it less likely to occur.The third type of loosening usually occurs when the wedge nut closest to the fastener gains loosening torque, causing the other two components to rotate. This requires a large locking torque and is difficult to achieve. Because the wedge nut furthest from the fastener, which is most prone to loosening, has higher anti-loosening performance than ordinary nuts, and the second and third types of loosening are difficult to occur, the entire assembly has better anti-loosening performance than ordinary nuts. In Examples 2, 3, and 4 below, the wedge nut furthest from the fastener may rotate together with the double-ended wedge clamp. In this case, the locking torque required is greater than that required for the wedge nut furthest from the fastener to rotate alone, and it is also difficult to obtain loosening torque. In this situation, the wedge nut and double-ended wedge clamp loosening together is much more difficult than the wedge nut rotating alone, so the assembly also has good anti-loosening performance in this case. In essence, the first and second types of loosening result in a decrease in loosening torque and an increase in locking torque, while the third type of loosening does not result in a decrease in loosening torque, but a significant increase in locking torque, thus giving the component excellent anti-loosening performance. Attached Figure Description

[0019] Figure 1 The preferred embodiment consists of a stepped countersunk wedge-shaped groove with a complete truncated cone-shaped connecting threaded hole, two identical first and second wedge-shaped clamping nuts with wedge-shaped groove wedging surfaces on the outer wall surface (i.e., the side surface of the truncated cone), and a double-ended wedge clamp with a double-ended truncated cone-shaped clamp in the center hole, forming a component in the main view and AA sectional view.

[0020] Figure 2 These are the front and top views of two identical first and second wedge nuts of the preferred embodiment.

[0021] Figure 3 These are the front and top views of the preferred embodiment of the double-ended wedge clamp with a central hole and a double-ended truncated cone shape.

[0022] Figure 4 The main view and AA sectional view of the component in which the wedge-tight surface fit at one end of the preferred solution is changed from a smooth surface fit to a striped surface fit, while the wedge-tight surface fit at the other end remains unchanged.

[0023] Figure 5 yes Figure 4 The components include the main view and AA section view of the wedge clamp nut with the wedge clamping surface changed from a smooth surface to a striped surface.

[0024] Figure 6 yes Figure 4 The components include the front view, AA section view, and BB section view of the double-headed wedge clamp with one end wedge surface changed from a smooth surface to a striped surface.

[0025] Figure 7To modify the wedge groove of one of the two wedge nuts in the preferred scheme from a complete truncated cone-shaped stepped countersunk hole to two evenly distributed partial truncated cone-shaped stepped countersunk holes, while keeping the other unchanged, and to modify one end of the double-headed wedge clamp to a two-claw shape while keeping the other end unchanged, the following are the main view, AA section view and BB section view of the component.

[0026] Figure 8 yes Figure 7 In the assembly, the wedge-shaped groove is changed from a complete frustum-shaped stepped countersunk hole to two evenly distributed partial frustum-shaped stepped countersunk holes, forming the main view and auxiliary view of the wedge clamp nut.

[0027] Figure 9 yes Figure 7 In the component, change one end to a two-claw shape while keeping the other end unchanged. Create a double-headed wedge clamp with a main view, right view, and auxiliary view.

[0028] Figure 10 The preferred solution involves changing the wedge-shaped groove of one of the two wedge-shaped nuts from a complete frustum-shaped stepped countersunk hole to two evenly distributed segmented frustum-shaped stepped countersunk holes, while keeping the other unchanged. The main view, AA section view, and BB section view of the assembly formed by the two double-headed wedge clamps are shown.

[0029] Figure 11 yes Figure 10 Within the component, there are two identical double-headed wedge clamps: a main view and a secondary view.

[0030] Figure 12 The images show the front view and AA section view of an assembly consisting of two identical wedge-shaped nuts using a preferred design, and an open-center ball-shaped double-headed wedge clamp.

[0031] Figure 13 yes Figure 12 The main view and auxiliary view of the open-hole spherical double-headed wedge clamp in the component.

[0032] Figure 14 The images show the front view and AA section view of an assembly consisting of two identical wedge nuts using a preferred design, and an open-center cylindrical double-headed wedge clamp.

[0033] Figure 15 yes Figure 14 The main view and auxiliary view of the cylindrical double-headed wedge clamp with an open central hole in the component.

[0034] Figure 16 The front view shows the preferred double-headed wedge clamp and two wedge nuts connected as a whole using a groove and convex snap-fit ​​method.

[0035] Figure 17 yes Figure 16 Enlarged view of section I in the main view.

[0036] Figure 18 This is a front view of a preferred embodiment of a component fastening structure with gaskets and dust rings.

[0037] In the diagram: 1. First wedge nut; 2. Double-ended wedge clamp; 21. Opening; 22. Wedge clamp tightening surface; 3. Second wedge nut; 4. Fastening screw; 5. Washer; 6. Fastened part; 7. Dust ring; 01. Connecting thread; 02. Wedge groove; 03. Wedge groove tightening surface; 001. Wedge groove. Detailed Implementation

[0038] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0039] Example 1: As Figure 1 Components Figure 2 parts and Figure 3 The part drawing shows the component and part drawings of the preferred solution. Two identical wedge-shaped nuts are used, each with a fully circumferentially distributed truncated cone-shaped countersunk hole at the edge of the connecting threaded hole. The side of the truncated cone serves as the wedge-tightening surface of the wedge-shaped groove. During tightening, each wall surface of the countersunk hole forms a fully circumferentially distributed wedge groove with the outer cylindrical wall of the fastening screw, revolving around the axis of the connecting thread. The double-ended wedge clamp is a double-ended truncated cone-shaped part with an open central hole. The side of the truncated cone serves as its wedge-tightening surface. During tightening, the double-ended wedge clamp is installed between the two wedge-shaped nuts, fitted onto the fastening screw, and inserted into the wedge grooves at both ends, forming a wedge-tightening structure at both ends. Figure 1 Component. One fastening structure of this component, featuring washers and dust rings, is as follows: Figure 18 As shown.

[0040] Example 2: Figure 4 Components Figure 5 parts and Figure 6 Part, a wedge nut borrowed Figure 2 The part shown is a striped surface fit formed by changing the two wedge surfaces at one end of the preferred embodiment from smooth surfaces to non-smooth surfaces. Figure 4 Components.

[0041] Example 3: As Figure 7 Components Figure 8 parts and Figure 9 Part, a wedge nut borrowed Figure 2 The part shown is a modified version of the preferred embodiment, where one of the two wedge-shaped nuts has its wedge-shaped groove changed from a complete countersunk hole to two evenly distributed segmented countersunk holes. The other wedge-shaped nut remains unchanged, but one end of the double-ended frustum-shaped wedge clamp with an open central hole is changed to a two-claw shape. The modified wedge-shaped groove of the wedge-shaped nut is then fitted with the modified end of the double-ended wedge clamp to form the desired shape. Figure 7 Components.

[0042] Example 4: Figure 10 Components Figure 11 Part, a wedge nut borrowed Figure 2 Part, another wedge nut borrowed Figure 8 The part shown is a design where one of the two wedge-shaped nuts in the preferred solution has its wedge-shaped groove changed from a complete countersunk hole to two evenly distributed partial countersunk holes. The other wedge-shaped nut remains unchanged, while the double-ended wedge clamp with a double-conical truncated cone shape at both ends of the open central hole is changed from one to two identical parts. Figure 10 Components.

[0043] Example 5: Figure 12 Components Figure 13 Parts, two wedge nuts borrowed Figure 2 The part shown is a modified version where the double-headed wedge clamp in the preferred solution is replaced with an open-center ball-shaped clamp, while the two wedge clamp nuts remain unchanged, forming a... Figure 12 Components.

[0044] Example 6: As Figure 14 Components Figure 15 Parts, two wedge nuts borrowed Figure 2 The part shown is a modified version where the double-headed wedge clamp in the preferred design is replaced with a cylindrical shape with an open central hole and external sharp edges. The two wedge clamp nuts remain unchanged, forming... Figure 14 Components.

[0045] Example 7: As Figure 17 The component diagram shows a snap-fit ​​structure where, for ease of management, the wedge-shaped slot of the preferred wedge-shaped nut has an inner edge, and the corresponding part of the double-headed wedge clamp has a groove. The three parts are connected together using the elasticity of the opening ring of the double-headed wedge clamp. Figure 17 Components.

[0046] The above is a further description of the invention through embodiments, and is not intended to limit the invention. Any simple modifications or substitutions to the technical solutions of the invention without substantial technical features should be included within the protection scope of the invention.

Claims

1. A wedge-clamp type anti-loosening double nut assembly, characterized in that: It consists of a first wedge nut, a double-ended wedge clamp, and a second wedge nut. Both wedge nuts are nuts with wedge-shaped grooves at the edge of the threaded hole end face of a regular nut. The distance from the point on the intersection line between the outer wall of the wedge groove away from the threaded axis and the plane passing through the threaded axis to the threaded axis decreases from the nut end face towards the inside of the nut. The outer wall face is the wedge-shaped groove wedging surface. The wedge-shaped groove is open and connected to the threaded hole and the slotted end face. When tightened, each wall face of the wedge-shaped groove and the outer cylindrical wall face of the fastening screw form a wedge groove surrounding the fastening screw. The wedging surface of the wedge groove is the wedge-shaped groove wedging surface. The wedge groove can be distributed around the entire circumference of the edge of the threaded hole end face. The complete type can also be a type consisting of one or several segments at the edge of the threaded hole. When the wedge groove consists of several segments, the segments can be the same or different, and their size and distribution can be set as needed. The two wedge nuts can be the same or different, but at least one of the wedge nuts must have a wedge groove that is a rotating wedge groove that is fully distributed around the edge of the threaded hole and has the threaded axis as its axis. This allows the double-headed wedge clamp that mates with the wedge nut to rotate freely within the wedge groove during the tightening process, ensuring that the two wedge nuts can rotate relative to each other to form a wedge-tight structure with the double-headed wedge clamp. A double-ended wedge clamp is a double-ended wedge-shaped part that surrounds the fastening screw and is attached to the outer cylindrical wall. In the structure, the distance from the point on the intersection line of the outer wall away from the component axis and the plane passing through the component axis to the component axis increases from the two end faces towards the middle. It can be fitted with the wedge clamp nuts opposite the wedge-shaped slots at both ends and the wedge grooves formed by the connecting screw to form a wedge-tightening structure. The outer wall is the wedge-tightening surface of the double-ended wedge clamp. There can be one or several double-ended wedge clamps. When there are several double-ended wedge clamps, each double-ended wedge clamp can be the same or different, and the size and distribution can be set as needed. When the end face of the double-ended wedge clamp is claw-shaped, the number of claws at each end can be one or several, and the claws can be the same or different, and the size and distribution can be set as needed. When tightening, the double-ended wedge clamp is located between the two wedge-shaped nuts with opposite wedge-shaped grooves, and is set around the outer cylindrical wall of the fastening screw. This forms a wedge-tightening structure where the double-ended wedge clamp and the two wedge grooves on both sides are adapted to each other. The double-ended wedge clamp clamps the fastening screw through the wedge-tightening action at both ends, forming a wedge-type anti-loosening double nut assembly.

2. The wedge-type anti-loosening double nut assembly according to claim 1, characterized in that: The two wedge surfaces of a wedge-tight fit can be changed from smooth surfaces to non-smooth surfaces. Only one of the two wedge surfaces can be changed, or both can be changed. For a wedge-tight fit at both ends, only one end can be changed, or both ends can be changed in this way. If both ends of the wedge-tight fit are changed in this way, it must be ensured that one end does not seize up.

3. The wedge-clamp type anti-loosening double nut assembly according to claim 1 or 2, characterized in that: The non-smooth surface of the wedge can be a striped surface, a sawtooth surface, a mesh surface, or a surface with raised and recessed dots.

4. The wedge-type anti-loosening double nut assembly according to claim 1, characterized in that: The connection structures at both ends of the double-ended wedge clamp and the two wedge nuts in the assembly can be designed with grooves and convex ridges, utilizing the elasticity of the open ring of the double-ended wedge clamp to connect the three parts together in a snap-fit ​​structure. Alternatively, the fit at only one end can be designed as a connection structure, making the assembly consist of two parts.

5. The wedge-clamp type anti-loosening double nut assembly according to claim 1 or 4, characterized in that: The connection structure can also be a structural form achieved by using other parts.

6. The wedge-type anti-loosening double nut assembly according to claim 1, characterized in that: When using the component, a dustproof ring can be added between the two wedge nuts.

7. The wedge-type anti-loosening double nut assembly according to claim 1 or 6, characterized in that: The dust seal is made of a non-metallic material with good compressibility.

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