Anti-rotation structure for nut, bolt, screw and stud

Abstract

An anti-rotation structure for a nut, a bolt, a screw and a stud. The anti-rotation structure consists of a positioning member (1), a modified stud (3), and a nut (8); or a positioning member (1), a modified stud (3), and an externally recessed nut (4); or a positioning member (1), a modified nut (6), a stud (9), a curved elastic pin (2), an insert (10.3), and a fastened member (10); or a positioning member (1), a modified bolt (5), a curved elastic pin (2), an insert (10.3), and a fastened member (10); or a positioning member (1), a modified bolt (5), a curved elastic pin (2), an insert (10.3), and a fastened member (10); or a positioning member (1), a modified bolt (5), and a fastened member (10); or a positioning member (1), a modified nut (6), and a fastened member (10). The anti-rotation structure effectively restricts the rotational movement space of threads and limits collisions between fasteners, thereby achieving controllable assembly precision, easier disassembly and assembly and less disassembly damage to the positioning member. Anti-rotation nuts, bolts, screws and studs can be manufactured using only conventional processes, which reduces costs, eliminates loosening caused by rotation, and expands the application scope of screw anti-rotation.

Description

Anti-rotation structures for nuts, bolts, screws, and studs Technical Field

[0001] This invention relates to an anti-rotation structure for nuts, bolts, screws, and studs. Background Technology

[0002] Current structures that prevent nuts, bolts, and screws from loosening have problems such as relatively weak anti-loosening force, difficulty in controlling assembly precision, and inconvenience in disassembly and assembly. Summary of the Invention

[0003] To address the problems of relatively weak anti-loosening force, difficulty in controlling assembly accuracy, and inconvenience in disassembly and assembly of structures that prevent nuts, bolts, and screws from loosening, this invention provides an anti-rotation structure for nuts, bolts, screws, and studs.

[0004] This invention comprises a positioning element, a modified stud, a nut or positioning element, a modified stud, a concave nut or positioning element, a bent elastic pin, a modified stud, a nut or positioning element, a modified screw, a bent elastic pin, a fixed part, an insert or positioning element, a modified bolt, a bent elastic pin, a fixed part, an insert or positioning element, a modified nut, a stud, a bent elastic pin, a fixed part, an insert or positioning element, a modified bolt, a fixed part or positioning element, a stud, a modified nut, a fixed part or positioning element, a modified nut, a bent elastic pin, a fixed part, an insert, a modified stud, a positioning element, and a bent elastic pin. The positioning component consists of a cylindrical upper part and a sleeve-shaped stop structure that mates with a nut at the lower part. Both the upper and lower parts are locking ends, either integrally formed or the upper part is a cylindrical tube with an inverted vault-shaped cavity containing a stop structure. The upper locking end is either integrally formed or has an inverted vault-shaped cavity containing a stop structure. The upper edge of the inverted vault-shaped cavity is an outwardly folded flat washer-shaped locking end, marked or not marked with a positioning indicator. The bottom of the inverted vault-shaped cavity is flat, and a stop structure is either formed on the inner side or inside the cavity. The stud is made as a single piece or a flat washer, with its outer edge serving as the locking end and marked with or without a positioning indicator. A stop structure is provided on the inner side or inside the hole. Alternatively, the outer edge of the single piece or flat washer is made into a shallow basin shape, with the edge of the shallow basin serving as the locking end. A stop structure is provided on the inner side or inside the hole. Alternatively, the upper edge of the single piece or inverted platform-shaped cavity is made into an outward-facing flat washer-shaped locking end, marked with or without a positioning indicator. A stop structure is provided inside the inverted platform-shaped cavity. Alternatively, the upper part of the single piece or cylindrical tube is the locking end. The modified stud has a locking end on its top surface. N straight keyways or N irregular keyways, or N press-in pits formed on the top side, are integrated into one piece; the concave nut is formed into one piece by having a notch formed on the side of the force-applying end; the modified bolt, modified nut, and modified screw are formed into one piece by having a stop structure formed on the force-applying surface or by being integrated with the positioning component; the fastener is formed into one piece by having N keyways or N insert pits formed on the force-bearing surface and being marked or not marked with positioning indicators, the upper part of the insert pit is larger than the lower part, and a step is formed between the upper and lower parts; the insert is formed into one piece by being integrated with the insert. The upper part of the blind plate is integrally formed to perfectly fit the pit; the bent elastic pin is formed by one straight end and the other bent end, with the straight end having a disassembly thread or disassembly cap; the stop structure is composed of N bosses, grooves, holes, or combinations of bosses, grooves, and holes, with the shapes of the bosses, grooves, and holes being regular N-gons, circles, rectangles, teeth, or irregular shapes; the stop structure of the positioning component and the stop structure of the modified stud, the external concave nut, the modified bolt, the modified nut, the modified screw, and the nut have a concave-convex tight fit relationship. The nut with the positioning component welded to the force-bearing surface is screwed onto the modified stud. The side of the locking end is cut out at the joint of the slotted keyway or irregular keyway of the modified stud, and the locking part is pressed out and locked into the slotted keyway or irregular keyway for a tight fit and lock, forming an anti-rotation structure;The concave nut is screwed into the stud to be modified, and a positioning component is installed. The stop structure has a concave-convex fit. A section of the lower locking end of the positioning component is embedded in the concave notch of the concave nut. The side of the upper locking end of the positioning component is cut out at the joint with the slotted or irregular keyway of the stud to form a locking part. Pressing it open and locking it into the slotted or irregular keyway creates a tight fit and locks the structure, thus forming an anti-rotation structure. The nut is screwed into the stud to be modified, and a positioning component is installed. The stop structure has a concave-convex fit. A portion of the side of the upper locking end of the positioning component is pressed into the pressing groove of the stud to form a tight fit and locks the structure, thus forming an anti-rotation structure. The nut is screwed into the stud to be modified, and a positioning component is installed. The stop structure has a concave-convex fit. A portion of the side of the upper locking end of the positioning component is pressed into the pressing groove of the stud and penetrates the bottom surface. A bent... The bent elastic pin provides a tight fit and locks in place, forming an anti-rotation structure. An insert is installed into the fastener, and a modified screw, integrated with the positioning element, is inserted into the fastener and tightened to secure it. The positioning mark on the positioning end of the positioning element and the positioning mark on the fastener are coaxially cut to create a locking portion for both the positioning element and the insert. The bent elastic pin is inserted into the locking portion for a tight fit and locks in place, forming an anti-rotation structure. The insert is installed into the fastener, and a modified screw, integrated with the positioning element, is inserted into the fastener and tightened to secure it. The positioning mark on the positioning end of the positioning element and the positioning mark on the fastener are coaxially cut to create a locking portion for both the positioning element and the insert. The bent elastic pin is inserted into the locking portion for a tight fit and locks in place, forming an anti-rotation structure. The insert is installed into the fastener, and the positioning mark... The modified nut, being a single piece, is screwed onto the stud to secure the component. A locking portion for the positioning element and insert is cut coaxially at the position indicated by the positioning mark on the locking end of the positioning element and the position marked on the component. A bent elastic pin is inserted into the locking portion for a tight fit and locking, forming an anti-rotation structure. The modified bolt's force-applying surface is fitted with the positioning element's stop structure, which engages with the component and is inserted into the component to tighten and secure it. A locking portion is cut at the point where the locking end engages with the keyway of the component; pressing and unfolding it allows it to engage with the keyway for a tight fit and locking, forming an anti-rotation structure. The modified nut's force-applying surface is fitted with the positioning element's stop structure, which engages with the stud to tighten and secure the component. A locking portion is cut at the point where the locking end engages with the keyway of the component; pressing and unfolding it allows it to engage with the keyway for a tight fit and locking, forming an anti-rotation structure. Anti-rotation structure: A nut is screwed onto the modified stud to secure the component. A nut with a positioning element welded to its force-bearing surface is screwed onto the modified stud to secure the nut. The side of the locking end is cut out at the point where it fits tightly with the keyway or irregular keyway of the modified stud. Pressing it open and locking it into the keyway or irregular keyway creates a tight fit and locks the anti-rotation structure. A positioning element is installed on the force-bearing surface of the modified nut. The nut is screwed onto the modified stud to secure the component. The side of the locking end is cut out at the point where it fits tightly with the keyway of the component. Pressing it open and locking it into the keyway creates a tight fit and locks the anti-rotation structure. Another positioning element is fitted onto the modified stud and nut. A portion of the upper locking end of the positioning element is pressed into the pressing groove of the modified stud to create a tight fit and lock the anti-rotation structure.

[0005] This invention effectively suppresses the rotational movement space of the thread and limits collisions between fasteners, representing an improvement over the "structure that prevents nuts, bolts, and screws from loosening." The anti-rotation structure uses shear force to prevent rotation of the positioning component, which is stronger than the deformation force resistance of the positioning component in the "structure that prevents nuts, bolts, and screws from loosening." It is also easier to disassemble and assemble than the "structure that prevents nuts, bolts, and screws from loosening," and facilitates control over assembly precision. The bent elastic pin has a very small mass, and the pull-out force exerted on it by vibration loads is far less than its inherent anti-pulling force, so it will not vibrate out. The bent elastic pin and the locking part have a slightly tight fit that approaches sliding, resulting in limited tension. Disassembly only requires overcoming limited tension and the elastic force of the bent elastic pin, making disassembly and assembly simple and easy. Various configurations of the anti-rotation structure are available to suit different locations, spaces, and technical requirements. The superposition of anti-rotation structures also results in anti-rotation studs. The locking method, which uses the periphery or side of the positioning part to lock the bent elastic pin, nut, modified stud, or keyway of the fastener, still allows the nut, bolt, or screw to be tightened and fixed in place.

[0006] The features of this invention are: the anti-rotation structure allows the positioning component to hold the nut, bolt, screw, and stud in place with shear resistance, resulting in a stronger and more stable anti-rotation force; it makes assembly accuracy controllable, disassembly and assembly easier, and reduces damage to the positioning component; and it does not damage the nut, bolt, screw, or stud during disassembly and assembly. It eliminates the need for the experienced manufacturing process of "never loosening the nut," allowing for the manufacture of anti-rotation nuts, bolts, screws, and studs using only conventional processes.

[0007] The beneficial effects of this invention are: it eliminates loosening caused by rotation, expands the anti-rotation range of screws, reduces the manufacturing technical difficulty of anti-rotation of nuts, bolts, screws, and studs, reduces the anti-rotation cost of nuts, bolts, screws, and studs, and reduces the incidence of equipment wear, accidents, and failures caused by loosening of nuts, bolts, screws, and studs due to rotation, thus facilitating the promotion of anti-rotation of nuts, bolts, screws, and studs. Attached Figure Description

[0008] Figures 1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 29, 31, 33, 35, 41, 43, 45, 47, 49, 51, 53, 55, 57, and 59 are front views. Figures 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 42, 44, 46, 48, 50, 52, 54, 56, 58, and 60 are top views, corresponding to the front views in sequence. Figures 37, 38, 39, and 40 are front views. Figures 1-16 are schematic diagrams of eight typical structures of positioning components; Figures 17-22 are schematic diagrams of three typical structures of modified studs; Figures 23 and 24 are schematic diagrams of concave nuts; Figures 25 and 26 are schematic diagrams of screws and positioning components integrated into one structure; Figures 27 and 28 are schematic diagrams of bolts and positioning components integrated into one structure; Figures 29 and 30 are schematic diagrams of nuts and positioning components integrated into one structure; Figures 31 and 32 are schematic diagrams of the structure of the fastener; Figures 33 and 34 are schematic diagrams of the structure of the insert; Figures 35 and 36 are schematic diagrams of the structure of the insert; Figures 37 and 38 are schematic diagrams of two forms of bent elastic pins; Figures 39 and 40 are schematic diagrams of two structural forms of bent elastic pin assembly; Figures 41 and 42 are schematic diagrams of an anti-rotation structure composed of tubular positioning components, modified studs, and nuts; Figures 43 and 44 are schematic diagrams of an anti-rotation structure composed of positioning components, modified studs, and nuts; Figures 45 and 46 are schematic diagrams of positioning components, modified studs, and nuts integrated into one structure; Figures 47 and 28 are schematic diagrams of a bolt and positioning component integrated into one structure; Figures 29 and 30 are schematic diagrams of a nut and positioning component integrated into one structure; Figures 31 and 32 are schematic diagrams of the structure of the fastener; Figures 39 and 40 are schematic diagrams of the structure of the fastener; Figures 41 and 42 are schematic diagrams of an anti-rotation structure composed of tubular positioning components, modified studs, and nuts; Figures 43 and 44 are schematic diagrams of an anti-rotation structure composed of positioning components, modified studs, and nuts; Figures 45 and 46 are schematic diagrams of a bolt and bolt Figures 47 and 48 show a schematic diagram of an anti-rotation structure consisting of a positioning element, a bent elastic pin, a modified stud, and a nut; Figures 49 and 50 show a schematic diagram of an anti-rotation structure consisting of a modified screw, a fixed part, and a bent elastic pin integrated with the positioning element; Figures 51 and 52 show a schematic diagram of an anti-rotation structure consisting of a modified bolt, a fixed part, and a bent elastic pin integrated with the positioning element; Figures 53 and 54 show a schematic diagram of an anti-rotation structure consisting of a modified nut, a stud, a fixed part, and a bent elastic pin integrated with the positioning element; Figures 55 and 56 show a schematic diagram of a countersunk anti-rotation structure consisting of a positioning element with a flat bottom, a modified bolt, and a fixed part; Figures 57 and 58 show a countersunk anti-rotation structure consisting of a positioning element, a modified bolt, and a fixed part with two different shapes; Figures 59 and 60 show a countersunk anti-rotation structure consisting of a positioning element, a modified nut, a stud, and a fixed part with multiple shapes.

[0009] In the diagram, 1-positioning component, 1.1-locking end, 1.2-round tube, 1.3-inverted cleft cavity, 1.4-locking part, 2-bent elastic pin, 2.1-disassembly thread, 2.2-disassembly cap, 3-modified stud, 3.1-slotted keyway, 3.2-irregular keyway, 3.3-press-in pit, 4-concave nut, 4.1-notch, 5-modified bolt, 6-modified nut, 7-modified screw, 8-nut, 9-stud, 10-fixed part, 10.1-keyway, 10.2-embedded pit, 10.3-embedded component, 11-stop structure, 11.1-boss, 11.2-hole, 11.3-regular hexagonal annular boss, 11.4-regular N-sided hole, 11.5-toothed hole, 12-positioning indicator. Detailed Implementation

[0010] As shown in Figures 1 and 2, the upper part of the positioning component 1 is a cylindrical tube 1.2, and the lower part is a sleeve-shaped stop structure 11 that cooperates with the nut. Both ends are integrally formed as locking ends 1.1.

[0011] As shown in Figures 3 and 4, the upper part of the positioning component 1 is a cylindrical tube 1.2, and the lower part is an inverted truncated cavity 1.3. The cavity has a hole 11.2 for the stop structure 11, and the upper edge is a locking end 1.1, which are integrally formed.

[0012] As shown in Figures 5 and 6, the positioning component 1 is an inverted platform-shaped cavity 1.3, which has a hole 11.2 for the stop structure 11 inside, and the upper edge is a locking end 1.1, which is integrally formed.

[0013] As shown in Figures 7 and 8, the upper edge of the inverted platform cavity 1.3 of the positioning component 1 is an outwardly turned flat pad-shaped locking end 1.1, the bottom of the inverted platform cavity 1.3 is a flat pad shape, and the inner hole is made into a toothed hole 11.5 for the stop structure 11, which is integrally formed.

[0014] As shown in Figures 9 and 10, the positioning component 1 is a flat pad with a locking end 1.1 marked with a finger position mark 12. The inner hole side has a boss 11.1 and a hole 11.2 of a stop structure 11, which are integrally formed.

[0015] As shown in Figures 11 and 12, the positioning component 1 is a flat pad with a shallow basin-shaped outer edge. The edge of the shallow basin is the locking end 1.1, and the inner hole side is provided with a regular hexagonal annular boss 11.3 of the stop structure 11, which is integrally formed.

[0016] As shown in Figures 13 and 14, the inverted platform-shaped cavity 1.3 of the positioning component 1 has an outward-turned flat pad-shaped locking end 1.1 marked with a finger position mark 12, and a hole 11.2 of a stop structure 11 is made inside the cavity, forming an integral structure.

[0017] As shown in Figures 15 and 16, the positioning component 1 is tubular, with the upper part being the locking end 1.1, and is integrally formed.

[0018] As shown in Figures 17 and 18, the top surface of the modified stud 3 is integrally formed with a slotted keyway 3.1.

[0019] As shown in Figures 19 and 20, the top surface of the modified stud 3 is integrally formed with an irregular keyway 3.2.

[0020] As shown in Figures 21 and 22, the top side of the modified stud 3 is integrally formed with a pressing pit 3.3.

[0021] As shown in Figures 23 and 24, the side of the force-applying end of the concave nut 4 is integrally formed with a notch 4.1.

[0022] As shown in Figures 25 and 26, the modified screw 7 and the positioning part 1 marked with the position mark 12 are integrated into one piece.

[0023] As shown in Figures 27 and 28, the modified bolt 5 is integrated with the positioning part 1 marked with the position indicator 12.

[0024] As shown in Figures 29 and 30, the modified nut 6 is integrated with the positioning part 1 marked with the position indicator 12.

[0025] As shown in Figures 31 and 32, the force-bearing surface of the fastener 10 has an embedded pit 10.2 and a marking mark 12, which are integrally formed.

[0026] As shown in Figures 33 and 34, the upper part of the embedded pit 10.2 is larger than the lower part, and the upper and lower parts form a step-like structure.

[0027] As shown in Figures 35 and 36, the insert 10.3 is a blind plate, which is integrally formed.

[0028] As shown in Figure 37, the bent elastic pin 2 has one straight end and the other bent end. The straight end is made with a thread 2.1 to help with unscrewing, and the two are integrally formed.

[0029] As shown in Figure 38, the bent elastic pin 2 has one straight end and the other bent end. The straight end is designed to help remove the cap 2.2, and the two are integrally formed.

[0030] As shown in Figure 39, part of the side of the locking end 1.1 on the upper part of the positioning part 1 is pressed into the pressing pit 3.3 of the modified stud 3 and penetrates the bottom surface, and a bent elastic pin 2 is installed for tight fit and locking.

[0031] As shown in Figure 40, the insert 10.3 is inserted into the insert pit 10.2 of the fixed part 10. The positioning part 1 and the locking part 1.4 of the insert 10.3 are cut out coaxially at the marked position. The bent elastic pin 2 is inserted into the locking part 1.4 for tight fit and locking.

[0032] As shown in Figures 41 and 42, the nut 8 with the tubular positioning part 1 welded to the force-bearing surface is screwed onto the modified stud 3. The side of the locking end 1.1 is cut out at the tight fit with the irregular keyway 3.2, the locking part 1.4 is pressed and unfolded and locked into the irregular keyway 3.2 to form an anti-rotation structure.

[0033] As shown in Figures 43 and 44, the nut 8 is screwed into the modified stud 3, and the positioning part 1 and the stop structure 11 are fitted together. The side of the upper locking end 1.1 of the positioning part 1 is pressed into the pressing pit 3.3 of the modified stud 3 for tight fitting and locking, thus forming an anti-rotation structure.

[0034] As shown in Figures 45 and 46, the concave nut 4 is screwed into the modified stud 3, and the positioning part 1 and the stop structure 11 are fitted together. A section of the lower locking end 1.1 of the positioning part 1 is embedded in the notch 4.1. The side of the upper locking end 1.1 of the positioning part 1 is cut out at the tight fit with the irregular keyway 3.2, and the locking part 1.4 is pressed out and locked into the irregular keyway 3.2 to form an anti-rotation structure.

[0035] As shown in Figures 47 and 48, the nut 8 is screwed into the modified stud 3, the positioning part 1 is installed, and the locking structure 11 is engaged with the upper locking end 1.1 of the positioning part 1. Part of the side is pressed into the pressing pit 3.3 of the modified stud 3 and penetrates the bottom surface. The bent elastic pin 2 is installed to lock it tightly, thus forming an anti-rotation structure.

[0036] As shown in Figures 49 and 50, the modified screw 7, which is integrated with the positioning component 1, is inserted into the fixed component 10 and tightened to fix the fixed component 10. The positioning mark 12 on the locking end 1.1 of the positioning component 1 and the positioning mark 12 of the fixed component 10 are coaxially cut out to form a locking part 1.4. The bent elastic pin 2 is inserted into the locking part 1.4 for tight fit and locking, forming a non-rotation structure.

[0037] As shown in Figures 51 and 52, the modified bolt 5, which is integral with the positioning component 1, is inserted into the fixed component 10 and tightened to fix the fixed component 10. The positioning mark 12 on the locking end 1.1 of the positioning component 1 and the positioning mark 12 of the fixed component 10 are coaxially cut out to form a locking part 1.4. The bent elastic pin 2 is inserted into the locking part 1.4 for tight fit and locking, forming a non-rotation structure.

[0038] As shown in Figures 53 and 54, the modified nut 6, which is integrated with the positioning component 1, is screwed and tightened with the stud 9 to fix the fixed part 10. The positioning mark 12 on the locking end 1.1 of the positioning component 1 and the positioning mark 12 of the fixed part 10 are coaxially cut out to form a locking part 1.4. The bent elastic pin 2 is inserted into the locking part 1.4 for tight fit and locking, forming a non-rotation structure.

[0039] As shown in Figures 55 and 56, the modified bolt 5 has a flat bottom locating part 1 and a stop structure 11 that fits into the fixed part 10 to tighten and fix the fixed part 10. The side of the locating part 1.1 is cut out at the tight fit between the locating part 1 and the keyway 10.1. The locating part 1.4 is pressed out and unfolded to fit into the keyway 10.1 and lock, forming a countersunk anti-rotation structure.

[0040] As shown in Figures 57 and 58, the modified bolt 5 has a positioning part 1 and a stop structure 11 with two different shapes installed on the force application surface. The positioning part 1 is inserted into the fixed part 10 with a concave-convex fit and tightened to fix the fixed part 10. The side of the locking end 1.1 of the positioning part 1 is cut out at the tight fit with the keyway 10.1. The locking part 1.4 is pressed out and locked into the keyway 10.1 to form a countersunk anti-rotation structure.

[0041] As shown in Figures 59 and 60, the modified nut 6 has a positioning part 1 with various shapes and a stop structure 11 that fits into the stud 9 and is tightened to fix the fixed part 10. The side of the locking end 1.1 of the positioning part 1 is cut out at the keyway 10.1 and the locking part 1.4 is pressed out and locked into the keyway 10.1 to form a countersunk anti-rotation structure.

Claims

1. An anti-rotation structure for nuts, bolts, screws, and studs, characterized in that: Composed of a positioning element (1), a modified stud (3), a nut (8) or a positioning element (1), a modified stud (3), a concave nut (4) or a positioning element (1), a bent elastic pin (2), a modified stud (3), a nut (8) or a positioning element (1), a modified screw (7), a bent elastic pin (2), a fastener (10), an insert (10.3) or a positioning element (1), a modified bolt (5), a bent elastic pin (2), a fastener (10), an insert (10.3) or a positioning element (1), a modified nut (6), a stud (9), a bent elastic pin (2), a fastener (10), an insert (10.3) or a positioning element (1), a modified bolt (5), a fastener (10) or a positioning element (1), a stud (9). The modified nut (6), the fixed part (10) or the positioning part (1), the modified nut (6), the bent elastic pin (2), the fixed part (10), the insert (10.3), the modified stud (3), the positioning part (1), and the bent elastic pin (2) are composed of a modified nut (6), a fixed part (10), an embedded part (10.3), a modified stud (3), a positioning part (1), and a bent elastic pin (2); the positioning part (1) is a cylindrical tube (1.2) at the top and a sleeve-shaped stop structure (11) that cooperates with the nut (8) at the bottom. Both the upper and lower parts are locking ends (1.1) and are made as one piece, or the upper part is a cylindrical tube (1.2) and the lower part is an inverted truncated cavity (1.3) with a stop structure (11) inside. The upper part is a locking end (1.1) and is made as one piece, or the upper part is an inverted truncated cavity (1.3) with a stop structure (11) inside. The upper part is a locking end (1.1) and is made as one piece. The upper edge of the inverted vault cavity (1.3) is made into an outward-curved flat pad-shaped locking end (1.1) and may or may not be marked with a finger position mark (12). The bottom of the inverted vault cavity (1.3) is flat pad-shaped. The inner hole side or inner hole has or is made into a stop structure (11). It is made as a whole or flat pad with its outer edge as a locking end (1.1) and may or may not be marked with a finger position mark (12). The inner hole side or inner hole has or is made into a stop structure (11). It is made as a whole or flat pad with its outer edge as a shallow basin shape. The edge of the shallow basin is a locking end (1.1). The inner hole side or inner hole has or is made into a stop structure (11). The upper edge of the inverted vault cavity (1.3) is made into an outward-curved flat pad-shaped locking end (1.1) and may or may not be marked with a finger position mark (12). The inverted vault cavity (1.3) has a stop inside. The structure (11) is made as a whole or a cylindrical tube (1.2) with a locking end (1.1) at the top, and is made as a whole; the modified stud (3) is made as a whole by having N slotted keyways (3.1) or N irregular keyways (3.2) on its top surface or N pressing pits (3.3) on its top side; the concave nut (4) is made as a whole by having a notch (4.1) on its side at the force application end; the modified bolt (5), modified nut (6), and modified screw (7) are made as a whole by having a stop structure (11) on their force application surface or by being made as a whole with the positioning part (1); the fixed part (10) is made as a whole by having N keyways (10.1) or N embedding pits (10.2) on its force application surface and being marked or not marked with a positioning mark (12), and the embedding pit (10).2) The upper part is larger than the lower part, and a step is formed between the upper and lower parts, which are integrally formed; the insert (10.3) is integrally formed by the blind plate that is completely matched with the upper part of the insert pit (10.2); the bent elastic pin (2) is integrally formed by one end being straight and the other end being bent, and the straight end is provided with a disassembly thread (2.1) or a disassembly cap (2.2); the stop structure (11) is composed of its N bosses (11.1) or grooves or holes (11.2) or a combination of bosses (11.1), grooves, and holes (11.2), and the shape of the bosses (11.1), grooves, and holes (11.2) is a regular N-sided polygon or a circle or a rectangle or a tooth or an irregular shape; the stop structure (11) of the positioning part (1) is combined with the modified stud (3), the external concave nut (4), and the modified The stop structure (11) of the bolt (5), the nut (6), the screw (7), and the nut (8) are in a concave-convex tight fit relationship; the nut (8) with the positioning part (1) welded on the force-bearing surface is screwed onto the stud (3) of the modified stud. The side of the locking end (1.1) is cut out at the tight fit with the slotted keyway (3.1) or irregular keyway (3.2) of the stud (3). The locking part (1.4) is pressed and unfolded to lock into the slotted keyway (3.1) or irregular keyway (3.2) to form a tight fit and lock, thus forming an anti-rotation structure; the concave nut (4) is screwed onto the stud (3) of the modified stud and the positioning part (1) is installed. The stop structure (11) is in a concave-convex fit. A section of the locking end (1.1) at the bottom of the positioning part (1) is embedded in the concave notch of the concave nut (4). (4.1), the side of the upper locking end (1.1) of the positioning part (1) is cut out at the tight fit of the slotted keyway (3.1) or irregular keyway (3.2) of the stud (3) to form a locking part (1.4). Press and unfold it to lock into the slotted keyway (3.1) or irregular keyway (3.2) to form a tight fit and lock it, thus forming an anti-rotation structure; the nut (8) is screwed into the stud (3) to install the positioning part (1), the stop structure (11) is in a concave-convex fit, and part of the side of the upper locking end (1.1) of the positioning part (1) is pressed into the pressing pit (3.3) of the stud (3) to form a tight fit and lock it, thus forming an anti-rotation structure; the nut (8) is screwed into the stud (3) to install the positioning part (1), the stop structure (11) is in a concave-convex fit, the positioning part (1.4) is in a concave-convex fit, and part of the ....1) is in a concave-convex fit, the positioning part (1.4) is in a concave-convex fit, and part of the locking end (1.1) of the positioning part (1.1) is in a concave-convex fit, the positioning part (1.4) is in a concave-convex fit, and part of the locking end (1.1) of the positioning part (1.1) is in a 1) The upper locking end (1.1) is pressed into the pressing pit (3.3) of the modified stud (3) and penetrates the bottom surface. A bent elastic pin (2) is inserted for tight fit and locking, forming an anti-rotation structure. The insert (10.3) is inserted into the fixed part (10). The modified screw (7) which is integrated with the positioning part (1) is inserted into the fixed part (10) and tightened to fix the fixed part (10). The positioning part (1.4) of the positioning part (1) and the insert (10.3) is cut out coaxially at the position marked by the positioning mark (12) of the locking end (1.1) of the positioning part (1) and the positioning mark (12) of the fixed part (10). The bent elastic pin (2) is inserted into the locking part (1.4) for tight fit and locking, forming an anti-rotation structure. The insert (10.3) is inserted into the locking part (1.4).3) Insert the fixed part (10), and insert the modified bolt (5) which is integral with the positioning part (1) into the fixed part (10) and tighten it to fix the fixed part (10). Cut out the positioning part (14) of the positioning part (1) and the insert part (10.3) at the position marked by the positioning mark (12) of the positioning part (1) and the position marked by the positioning mark (12) of the fixed part (10) on the same axis. Insert the bent elastic pin (2) into the positioning part (14) for tight fit and lock to form an anti-rotation structure. Insert the insert part (10.3) into the fixed part (10), and screw the modified nut (6) which is integral with the positioning part (1) onto the stud (9) to fix the fixed part (10). The positioning mark (12) of the positioning end (1.1) and the positioning mark (12) of the fastener (10) are coaxially cut to form the positioning part (1) and the locking part (10.3) of the insert (1.4). The bent elastic pin (2) is inserted into the locking part (1.4) for a tight fit and locking, forming an anti-rotation structure. The positioning part (1) of the bolt (5) is installed on the force application surface. The anti-rotation structure (11) of the positioning part (1) is inserted into the fastener (10) for a concave-convex fit and tightened to fix the fastener (10). The locking part (1.4) is cut at the tight fit between the side of the locking end (1.1) and the keyway (10.1) of the fastener (10). Pressing and unfolding it into the keyway (10.1) forms a tight fit and locking, forming an anti-rotation structure. The force application surface of the nut (6) is cut into the locking part (1.4). The positioning component (1) and the stop structure (11) are screwed onto the stud (9) to fix the fixed part (10). The side of the locking end (1.1) is cut out at the keyway (10.1) of the fixed part (10) to form a locking part (1.4). Press and unfold it to lock into the keyway (10.1) for a tight fit and lock it in place, forming an anti-rotation structure. The nut (8) is screwed onto the modified stud (3) to fix the fixed part (10). The nut (8) with the positioning component (1) welded on the force-bearing surface is screwed onto the modified stud (3) to fix the nut (8). The side of the locking end (1.1) is cut out at the keyway (3.1) or irregular keyway (3.2) of the modified stud (3) to form a locking part (1.4). Press and unfold it to lock into the keyway (10.1) for a tight fit and lock it in place, forming an anti-rotation structure. The keyway is pressed open and engaged with a slotted keyway (3.1) or a non-slit keyway (3.2) for a tight fit, forming an anti-rotation structure. The nut (6) is fitted with a positioning element (1) and a stop structure (11) that engages with the stud (3) to secure the fixed part (10). A locking portion (1.4) is cut at the point where the locking end (1.1) engages with the keyway (10.1) of the fixed part (10). The locking part is then pressed open and engaged with the keyway (10.1) for a tight fit. Another positioning element (1) is fitted onto the stud (3) and the nut (6), and a portion of its upper locking end (1.1) is pressed into the pressing pit (3.3) of the stud (3) for a tight fit, forming an anti-rotation structure.

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