Multi-locking bolt and mounting method thereof

Abstract

The multi-locking bolt comprises a bolt head and a stud, the exterior of the stud is connected with a nut, a first mounting hole and a second mounting hole are formed in the center positions in the bolt head and the stud, and fastening assemblies are mounted in the first mounting hole and the second mounting hole; the fastening assembly comprises a top mounting head, the bottom of the mounting head is connected with a connecting column, and a plurality of clamping block assemblies are mounted on the outer wall of the connecting column; a butt-joint groove matched with the mounting head is formed in the center of the top of the mounting hole I in the bolt head; a plurality of mounting grooves are formed in the outer wall of the stud, elastic pieces are mounted in the mounting grooves, and clamping holes are formed in the mounting grooves; the two clamping block assemblies arranged in a staggered mode are clamped into the clamping holes in a staged mode, the inner wall of the elastic piece is pushed to expand outwards, radial pressure is formed, the elastic piece is tightly attached to the inner wall of the nut after being extruded by the clamping blocks, friction resistance is increased, and two-way friction locking is formed by the annular protruding strips of the gasket and the anti-slip strips of the nut; the positioning base is matched with the positioning groove and the positioning block to achieve pre-alignment, and dislocation is avoided.

Description

Technical Field

[0001] The present invention particularly relates to a multiple locking bolt and a method for installing the same. Background Art

[0002] In the field of mechanical connections, bolts are core fasteners, and their anti-loosening performance directly affects the safety and reliability of equipment. Traditional bolt anti-loosening methods, such as spring washers, double nuts, and cotter pins, primarily rely on friction or mechanical constraints to prevent loosening.

[0003] Spring washers provide additional friction through elastic deformation, but in high-frequency vibration or temperature fluctuations, elasticity attenuation significantly reduces the anti-loosening effect. Some multi-locking designs can improve anti-loosening performance, but require complex installation procedures. Existing double-sunk bolts are prone to loosening in vibrating environments because the mounting surface cannot accommodate gaskets. Traditional metal materials are prone to corrosion or creep under extreme conditions such as high temperature and salt spray, resulting in preload loss.

[0004] Therefore, it is necessary to invent a multiple locking bolt and an installation method thereof to solve the above problems. Summary of the Invention

[0005] (1) Purpose of the invention The object of the present invention is to provide a multiple locking bolt and an installation method thereof, which can fix the locked object in a multiple locking manner to solve the above-mentioned shortcomings in the technology.

[0006] (2) Technical solution To achieve the above objectives, the present invention provides the following technical solution: a multiple locking bolt, comprising a bolt head and a stud, wherein a matching nut is connected to the outside of the stud, and a first mounting hole and a second mounting hole are provided at the center of the bolt head and the stud, and a fastening assembly is installed inside the two holes; The fastening assembly includes a top mounting head, the bottom of the mounting head is connected to a connecting column, and multiple groups of block assemblies are installed on the outer wall of the connecting column; A docking groove matching the mounting head is provided at the top center of the mounting hole in the bolt head; The outer wall of the stud is provided with a plurality of mounting grooves, elastic members are installed in the plurality of mounting grooves, and the mounting groove is provided with a plurality of clamping holes leading to the second mounting hole; A plurality of groups of the clamping block components cooperate with the clamping holes to act on the inner wall of the elastic member.

[0007] Preferably, the block assembly includes a telescopic groove arranged on the outer wall of the connecting column, the inner wall of the telescopic groove is recessed inward to form a limiting groove, a block is also installed in the telescopic groove, and limiting strips matching the limiting groove extend around the end of the block. A compression spring is installed in the telescopic groove between the end of the block and the bottom of the telescopic groove, and the block is locked in the card hole when the connecting column moves downward.

[0008] Preferably, the bottom of one side of the card block is a slope, the card block assembly is provided with two groups, the card holes are provided with two groups correspondingly, and two mounting grooves are provided at corresponding positions of the card holes, in which two elastic parts are installed, the lower card block assembly and the upper card block assembly are staggered, and the extending length of the card block exceeds the front end card opening of the card hole.

[0009] Preferably, the block assembly below is arranged on the outer wall of the positioning base extending from the bottom of the connecting column, and a plurality of positioning blocks are connected to the outer wall of the positioning base. The block assembly is arranged in the positioning block, and the bottom of the stud matches the positioning block and the positioning base and is provided with a positioning groove.

[0010] Preferably, the bolt head is hexagonal as a whole, and a plurality of evenly arranged anti-slip ridges are provided on the outer wall of the bolt head. A connecting block is provided at the junction of the anti-slip ridges on each side. The outer wall of the connecting block is a symmetrical arc surface, and the side connections of the bolt head are all arc surfaces.

[0011] Preferably, a mounting ring groove is provided at the connection position between the bottom of the bolt head and the stud, a washer is installed in the mounting ring groove, and the outer surface of the bottom of the washer is provided with multiple evenly spaced annular ridges, and the multiple annular ridges are concentrically arranged.

[0012] Preferably, a positioning ring groove is provided at the bottom of the stud above the installation position of the elastic part, the positioning ring groove matches the elastic part below, a matching annular plate is provided on the top of the elastic part, the groove depth of the installation groove on the outer wall of the stud matches the thickness of the elastic part, and is flush with the outer surface of the stud after installation, and the outer surfaces of multiple elastic parts are provided with threads that match the outer surface of the stud.

[0013] Preferably, a cross groove is recessed inwardly at the center of the top of the mounting head, and symmetrical vertical plates are provided on both sides of the top of the mounting head, and through holes of the same size are opened on the vertical plates.

[0014] Preferably, the nut is provided with fastening ring grooves of the same size on the upper and lower sides, fastening washers are installed in the fastening ring grooves on the upper and lower sides, and the mating surfaces of the fastening washers are provided with multiple anti-slip strips, and the multiple anti-slip strips are concentrically arranged.

[0015] A method for installing a multiple locking bolt comprises the following steps: S1. Insert the upper elastic member into the installation groove on the outer wall of the stud, aligning the surface thread of the elastic member with the outer thread of the stud. After installation, the outer surface is flat, and the annular plate on the top of the lower elastic member is aligned and fixed in the positioning ring groove. S2. Fix the fastening washer on the mating surface of the nut; S3. Completely install the bolt head and stud into the screw hole of the object to be fixed, and then tighten the nut so that the upper fastening washer contacts the contact surface of the object to be fixed; S4. Insert the fastening assembly into mounting hole 1 and mounting hole 2. During insertion, rotate the connecting column so that the lower clamping block assembly passes over the upper clamping hole and docks with the lower clamping hole until the corresponding clamping block is locked into the corresponding clamping hole; S5. Use an external tool to rotate the cross groove on the mounting head, insert the connecting column into the stud, squeeze the elastic part, and complete the locking of the upper and lower layers.

[0016] Compared with the prior art, the beneficial effects of the above technical solution of the present invention are: 1. The present invention uses two sets of staggered clamping block assemblies to clamp into the clamping holes in stages, pushing the inner wall of the elastic member to expand outward, forming radial pressure. After being squeezed by the clamping blocks, the elastic member clings to the inner wall of the nut, increasing friction resistance. The annular ridges of the washer and the anti-slip strips of the nut form a bidirectional friction lock; 2. The present invention achieves pre-alignment through the cooperation of the positioning base, positioning groove and positioning block to avoid misalignment. When the installation head is pressed down, the block pops out twice, and the locking is confirmed by sound or feel. The fastener assembly and bolt head are pre-assembled and transported as a whole. Only the stud needs to be inserted on site. 3. The bottom slope of the card block of the present invention allows the spring to be compressed when inserted downward, but it is blocked by the front end of the card hole when pulled in the opposite direction. The vertical plate through hole of the mounting head can be inserted with a pin to prevent unauthorized disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments described in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the nut disassembly structure of the present invention; Figure 3 This is a schematic diagram of the overall structure of the nut of the present invention; Figure 4 It is a schematic diagram of the overall structure of the present invention; Figure 5This is a schematic diagram of the overall structure of the bolt head and stud of the present invention; Figure 6 This is a schematic structural diagram of the outer side wall of the bolt head of the present invention; Figure 7 The overall structure of the fastening assembly of the present invention is schematically shown. Figure 1 ; Figure 8 The overall structure of the fastening assembly of the present invention is schematically shown. Figure 2 ; Figure 9 For the present invention Figure 8 Schematic diagram of the structure of part A.

[0019] Description of reference numerals: 1. Bolt head; 11. Mounting hole 1; 12. Docking groove; 13. Anti-slip ridge; 14. Connecting block; 15. Mounting ring groove; 2. Stud; 21. Mounting hole 2; 22. Mounting groove; 23. Clamping hole; 24. Positioning groove; 25. Positioning ring groove; 3. Nut; 31. Fastening ring groove; 32. Fastening washer; 33. Anti-slip strip; 4. Fastening assembly; 41. Mounting head; 42. Connecting column; 43. Clamping block assembly; 431. Telescopic slot; 432. Limiting slot; 433. Clamping block; 434. Limiting strip; 435. Compression spring; 44. Positioning base; 45. Positioning block; 46. Cross groove; 47. Vertical plate; 48. Through hole; 5. Elastic member; 51. Ring plate; 6. Washer; 61. Ring ridge. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0021] The present invention provides Figure 1-9 A multiple locking bolt is shown, comprising a bolt head 1 and a stud 2. A matching nut 3 is connected to the outside of the stud 2. A first mounting hole 11 and a second mounting hole 21 are provided at the center of the bolt head 1 and the stud 2. A fastening assembly 4 is installed inside the bolt head 1 and the stud 2. Furthermore, the fastening assembly 4 includes a top mounting head 41, a connecting column 42 is connected to the bottom of the mounting head 41, and multiple groups of block assemblies 43 are installed on the outer wall of the connecting column 42; Furthermore, a docking groove 12 matching the mounting head 41 is provided at the top center of the mounting hole 11 in the bolt head 1; Furthermore, a plurality of mounting grooves 22 are formed on the outer wall of the stud 2, and elastic members 5 are installed in the plurality of mounting grooves 22. A plurality of latch holes 23 leading to the second mounting hole 21 are formed in the mounting grooves 22. Furthermore, the multiple groups of clamping block assemblies 43 cooperate with the clamping holes 23 to act on the inner wall of the elastic member 5 .

[0022] Reference Figure 9 The clamping block assembly 43 includes a telescopic groove 431 arranged on the outer wall of the connecting column 42, the inner wall of the telescopic groove 431 is recessed inward to form a limiting groove 432, and a clamping block 433 is also installed in the telescopic groove 431. A limiting strip 434 matching the limiting groove 432 extends around the end of the clamping block 433, and a compression spring 435 is installed in the telescopic groove 431 between the end of the clamping block 433 and the bottom of the telescopic groove 431. When the connecting column 42 moves downward, the clamping block 433 is clamped into the clamping hole 23.

[0023] Furthermore, the bottom of one side of the block 433 is a slope, and there are two groups of block assemblies 43, and there are two groups of corresponding card holes 23, and two installation grooves 22 are provided at the corresponding positions of the card holes 23, in which two elastic members 5 are installed. The lower block assembly 43 and the upper block assembly 43 are staggered, and the block 433 extends out longer than the front end of the card hole 23.

[0024] In the present invention, the docking groove 12 at the top center of the mounting hole 11 in the bolt head 1 mates with the mounting head 41 at the top of the fastener assembly 4. Aligning the mounting head 41 with the docking groove 12 and inserting it into the docking groove 12 achieves the initial positioning of the fastener assembly 4 and the bolt head 1. A cross-shaped recess 46 is recessed inward at the top center of the mounting head 41 to facilitate operation with tools such as a Phillips screwdriver. Through-holes 48 on the symmetrical vertical plates 47 on either side of the top can be used to pass tools or ropes, aiding installation and securing.

[0025] In the present invention, a connecting post 42, attached to the bottom of the mounting head 41, is inserted into the first and second mounting holes 11 and 21 within the bolt head 1 and stud 2. Multiple locking block assemblies 43, located on the outer wall of the connecting post 42, engage with the locking holes 23 on the stud 2. Each locking block assembly 43 comprises an expansion slot 431 on the outer wall of the connecting post 42 and a recessed retaining slot 432 on the inner wall. The retaining block 433 is mounted within the slot, with retaining bars 434 surrounding the end of the retaining bar 434 to mate with the retaining slot 432. A compression spring 435 is located between the end of the retaining bar 434 and the bottom of the expansion slot 431. When the connecting post 42 moves downward, the compression spring 435 guides the inclined surface of the retaining block 433 into the retaining hole 23. The retaining bar 434 slides within the retaining slot 432, limiting the movement of the retaining block 433 and ensuring its stable engagement. There are two groups of clamping block assemblies 43, which are staggered. There are also two groups of corresponding clamping holes 23, and there are two mounting grooves 22 at corresponding positions, which contain two elastic members 5. The lower clamping block assembly 43 is set in the positioning block 45 on the outer wall of the positioning base 44 extending from the bottom of the connecting column 42. The positioning groove 24 at the bottom of the stud 2 matches the positioning block 45 and the positioning base 44. The positioning base 44 and the positioning block 45 are inserted into the positioning groove 24 to further fix the position of the connecting column 42.

[0026] Reference Figure 8 The lower block assembly 43 is arranged on the outer wall of the positioning base 44 extending from the bottom of the connecting column 42. A plurality of positioning blocks 45 are connected to the outer wall of the positioning base 44. The block assembly 43 is arranged in the positioning block 45, and the bottom of the stud 2 is matched with the positioning block 45 and the positioning base 44 to provide a positioning groove 24.

[0027] Reference Figure 1-5 The bolt head 1 is hexagonal as a whole, and a plurality of evenly arranged anti-slip ridges 13 are provided on the outer wall of the bolt head 1. A connecting block 14 is provided at the junction of the anti-slip ridges 13 on each side. The outer wall of the connecting block 14 is a symmetrical arc surface, and the side connections of the bolt head 1 are all arc surfaces.

[0028] Furthermore, a mounting ring groove 15 is provided at the connection position between the bottom of the bolt head 1 and the stud 2, and a washer 6 is installed in the mounting ring groove 15. The outer surface of the bottom of the washer 6 is provided with multiple evenly spaced annular ridges 61, and the multiple annular ridges 61 are concentrically arranged.

[0029] Furthermore, a positioning ring groove 25 is provided at the bottom of the stud 2 above the installation position of the elastic part 5, and the positioning ring groove 25 matches the elastic part 5 below. A matching annular plate 51 is provided on the top of the elastic part 5. The groove depth of the mounting groove 22 on the outer wall of the stud 2 matches the thickness of the elastic part 5, and is flush with the outer surface of the stud 2 after installation. The outer surfaces of multiple elastic parts 5 are provided with threads that match the outer surface of the stud 2.

[0030] In the present invention, the outer wall of the stud 2 is provided with multiple mounting grooves 22, the groove depth matching the thickness of the elastic member 5. After installation, the outer surface of the elastic member 5 is flush with the outer surface of the stud 2 and is provided with threads that match the outer surface of the stud 2. An elastic member 5 is placed in each mounting groove 22, and the annular plate 51 at the top of the elastic member 5 mates with the positioning ring groove 25 on the stud 2, located above the elastic member 5's mounting position. This ensures the elastic member 5 is accurately installed and allows for appropriate elastic deformation within the mounting groove 22. The mounting groove 22 also includes multiple latching holes 23 leading to the second mounting hole 21, facilitating the subsequent insertion of the latch assembly 43.

[0031] Furthermore, a cross groove 46 is recessed inwardly at the center of the top of the mounting head 41 , and symmetrical vertical plates 47 are provided on both sides of the top of the mounting head 41 . Through holes 48 of the same size are opened on the vertical plates 47 .

[0032] In this invention, the bolt head 1 is hexagonal in shape, with evenly spaced anti-slip ridges 13 on its outer wall. Each side of the anti-slip ridges 13 connects to a connecting block 14. The outer wall is symmetrically curved, and the side connections of the bolt head 1 are all curved, facilitating grip and load-bearing. A washer 6 is installed within a mounting groove 15 at the base of the bolt head 1, where it connects to the stud 2. The outer surface of the bottom of the washer 6 features multiple evenly spaced, concentrically arranged annular ridges 61. When the washer 6 is placed within the mounting groove 15, the ridges 61 mate with the inner wall of the groove 15, ensuring stable installation of the washer 6 and increasing the contact area and friction between the bolt head 1 and the connecting surface.

[0033] Furthermore, the nut 3 is provided with fastening ring grooves 31 of the same size on the upper and lower sides, and fastening washers 32 are installed in the fastening ring grooves 31 on both sides. The mating surfaces of the fastening washers 32 are provided with multiple anti-slip strips 33, and the multiple anti-slip strips 33 are concentrically arranged.

[0034] In the present invention, nut 3 is provided with fastening ring grooves 31 on both the top and bottom. Fastening washers 32 are installed in the upper and lower fastening ring grooves 31, respectively. The mating surfaces of fastening washers 32 are provided with multiple concentrically arranged anti-slip strips 33. When nut 3 is screwed onto stud 2, fastening washers 32 contact bolt head 1 and the connected component. Anti-slip strips 33 increase friction between the contact surfaces, preventing nut 3 from loosening.

[0035] A method for installing a multiple locking bolt comprises the following steps: S1. Confirm that the model and specifications of the elastic member 5 match the stud 2. Check the installation slot 22 for impurities and burrs. If necessary, clean it with fine sandpaper or a dedicated tool to ensure that the inner wall of the installation slot is smooth. Prepare a measuring tool of appropriate accuracy, such as a vernier caliper, to measure the position and surface flatness of the elastic member 5 after insertion. Next, hold the elastic member 5 so that its axis aligns with the axis of the stud 2. Slowly align the elastic member 5 with the mounting groove 22 on the outer wall of the stud 2. Gently apply axial pressure to gradually insert the elastic member 5 into the mounting groove 22. During the insertion process, continuously rotate the elastic member 5 while observing the alignment of its surface threads with the external threads of the stud 2. By comparing the starting thread positions of the two threads, you can ensure that each thread is accurately aligned to avoid misalignment. Furthermore, use a ruler or feeler gauge to inspect the outer surface of the installed elastic member 5 along the axis of the stud 2. If the outer surface is found to be higher or lower than the outer surface of the stud 2 at any point, correct it by fine-tuning the circumferential position of the elastic member 5 within the mounting slot 22. For slight height differences, gently tap the exposed portion of the elastic member 5 with a rubber hammer to evenly apply force until the outer surface is level. Furthermore, when the threads on the surface of the elastic member 5 are fully aligned with the external threads of the stud 2 and the outer surfaces are flat, the annular plate 51 on the top of the lower elastic member 5 should be aligned with the positioning ring groove 25 on the stud 2. At this point, a dedicated positioning tool, such as a positioning pin, is inserted through the positioning hole in the annular plate 51 so that it mates with the positioning hole in the positioning ring groove 25, achieving a preliminary fixation of the annular plate 51 to the positioning ring groove 25. Then, using a symmetrical tightening method, use a small screwdriver to tighten the fixing screws on the annular plate 51 one by one to ensure a secure fixation and prevent the elastic member 5 from shifting during subsequent operations. S2. Select a fastening washer 32 of appropriate specifications based on the size and usage scenario of the nut 3. The inner diameter of the fastening washer 32 should be slightly larger than the diameter of the mating surface of the nut 3, and the outer diameter should be compatible with the contact surface of the object being fixed to ensure that the washer can completely cover the contact area between the nut and the object being fixed and evenly transmit pressure; Furthermore, evenly apply a proper amount of thread glue on one side of the mating surface of the nut 3 to enhance the connection strength between the fastening washer 32 and the nut 3. Align the fastening washer 32 with the mating surface of the nut 3 so that the center hole of the washer coincides with the axis of the nut 3, and then use a special pressing tool, such as a small press, to apply pressure perpendicular to the mating surface of the nut to the fastening washer 32 until the washer is completely fitted on the nut 3. In the case where there is no pressing tool, you can also use a hammer and a pad, evenly tap the pad to fix the fastening washer 32 steadily on the mating surface of the nut 3. After the fixation is completed, check whether the fastening washer 32 is skewed, warped, etc. If so, it needs to be re-fixed. S3. Check the object to be installed to confirm that the size, depth and verticality of the screw hole meet the installation requirements. Use a tap to clean and trim the screw hole, remove debris and burrs in the screw hole, and ensure that the inner wall of the screw hole is smooth and the thread is complete; Next, connect the bolt head 1 and stud 2 as a single unit. Hold the bolt head 1 and align the stud 2 with the screw hole of the object being fixed. Gently apply axial pressure while rotating the bolt head 1 clockwise to engage the external threads of the stud 2 with the threads in the screw hole. During rotation, the axis of the bolt should be aligned with the axis of the screw hole to avoid thread damage caused by deviation. When the bolt head 1 contacts the surface of the object being fixed, stop rotating and check that the bolt is properly installed. That is, the stud 2 should be fully inserted into the screw hole and the bolt head 1 should be in close contact with the surface of the object being fixed. Next, place the nut 3 with the fastening washer 32 fixed on it onto the stud 2. Pre-tighten the nut 3 by hand, moving it slowly along the thread of the stud 2 until the fastening washer 32 contacts the contact surface of the object being fixed. Then, use a suitable wrench to tighten the nut 3 according to the specified tightening sequence and torque requirements. During the tightening process, apply force evenly to avoid excessive force that may damage the threads or deform the bolt. Tighten it several times to gradually reach the specified torque value to ensure a firm connection between the nut 3 and the object being fixed. S4. Before inserting the fastener assembly 4, carefully inspect the dimensions and shapes of the connecting column 42, the clamping block assembly 43, and the mounting holes 11 and 21 to ensure they are free of damage, deformation, or other defects. Check the clearance between the clamping block 433 and the clamping hole 23 to ensure it meets the design requirements and fits smoothly into the clamping hole. Next, align the connecting post 42 of the fastening assembly 4 with the mounting hole 11 and the mounting hole 21 and slowly insert it. During the insertion process, rotate the connecting post 42 clockwise so that the blocks 431 and 432 of the lower block assembly 43 first pass over the upper block hole 23. Continue inserting until the block assembly 43 reaches the position of the lower block hole 23. At this time, rotate the connecting post 42 counterclockwise to align the block 433 with the lower block hole 23, and then apply a certain amount of axial pressure to make the block 433 snap into the corresponding block hole 23. During the insertion process, pay attention to the fit between the block assembly 43 and the mounting hole to avoid excessive force that may damage the block or the hole wall; After insertion, check whether the fastener assembly 4 is tightly fitted with the stud 2 and bolt head 1, whether the clamping block 433 is completely inserted into the clamping hole 23, and whether there is any looseness or jamming. Gently shake the fastener assembly 4. If there is no obvious displacement, it indicates that the alignment and clamping are good. S5. Select an appropriate Phillips screwdriver or electric screwdriver as the external tool based on the size of the cross groove 46 on the mounting head 41. Check that the tool head is intact to avoid damage to the cross groove due to tool wear. Next, insert the head of a Phillips screwdriver into the cross-shaped groove 46 of the mounting head 41 and rotate the screwdriver clockwise with even force to gradually insert the connecting post 42 into the interior of the stud 2. During the rotation process, carefully observe the insertion depth of the connecting post 42. You can control the insertion depth by marking the connecting post 42 or observing the distance between the mounting head 41 and the end face of the stud 2. When the connecting post 42 is inserted to the specified depth, stop rotating. At this point, the lower end face of the connecting post 42 should contact the upper surface of the elastic member 5, exerting a certain amount of compressive force on the elastic member 5. After rotation is complete, check that mounting head 41 is secure and free of looseness. Try pulling the bolt assembly up and down or shaking it left and right. If no noticeable movement is felt, elastic member 5 has been effectively compressed, effectively locking the upper and lower layers. Also, check the deformation of elastic member 5; it should be evenly compressed, with no localized excessive deformation or cracking.

[0036] In this invention, the clamping block assembly 43 of the fastening assembly 4 engages with the locking hole 23 of the stud 2. Once locked into the locking hole 23, the clamping block 433 restricts relative rotation between the stud 2 and the fastening assembly 4. Simultaneously, the inner wall of the elastic member 5 is acted upon by the clamping block 433, generating an elastic force that further enhances the tightness of the connection. The staggered arrangement of the two sets of clamping block assemblies 43 creates multiple locking points. Compared to a single locking structure, this more effectively prevents the bolt from loosening under conditions such as vibration and impact, thereby improving the reliability of the connection.

[0037] In this invention, the docking groove 12 of the bolt head 1 mates with the mounting head 41, while the positioning base 44 and positioning block 45 cooperate with the positioning groove 24 of the stud 2. This ensures quick and accurate alignment of the fastener assembly 4 during installation, reducing installation time and errors. The cross-shaped groove 46 and through-hole 48 facilitate tool-assisted installation and removal, improving operational efficiency.

[0038] In this invention, the annular ridge 61 of the washer 6 and the anti-slip strip 33 of the fastening washer 32 increase the contact area with the connecting surface, evenly distributing pressure during bolt connection and preventing wear and deformation caused by excessive localized stress. The symmetrical curved surface design of the anti-slip strip 13 of the bolt head 1 and the connecting block 14 provide good grip and uniform force when tightening or loosening with a tool such as a wrench, reducing slippage and wear between the tool and the bolt head.

[0039] In the present invention, the elastic member 5 is installed in the installation groove 22 of the stud 2 and can undergo elastic deformation within a certain range. It can adapt to the small displacement of the connection parts caused by temperature changes, stress deformation, etc., avoid stress concentration caused by rigid connection, and improve the applicability and durability of the bolt under complex working conditions.

[0040] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims.

Claims

1. A multiple locking bolt, characterized in that: It comprises a bolt head (1) and a stud (2), wherein the stud (2) is externally connected with a matching nut (3), and the bolt head (1) and the stud (2) are provided with a first mounting hole (11) and a second mounting hole (21) at their inner centers, and a fastening assembly (4) is installed inside the two. The fastening assembly (4) comprises a top mounting head (41), the bottom of the mounting head (41) is connected to a connecting column (42), and a plurality of groups of block assemblies (43) are mounted on the outer wall of the connecting column (42); A docking groove (12) matching the mounting head (41) is provided at the top center of the mounting hole 1 (11) in the bolt head (1); The outer wall of the stud (2) is provided with a plurality of mounting grooves (22), elastic members (5) are installed in the plurality of mounting grooves (22), and a plurality of latching holes (23) leading to the second mounting hole (21) are provided in the mounting groove (22); A plurality of groups of the clamping block assemblies (43) cooperate with the clamping holes (23) to act on the inner wall of the elastic member (5).

2. The multi-locking bolt according to claim 1, characterized in that: The clamping block assembly (43) includes a telescopic groove (431) provided on the outer wall of the connecting column (42), the inner wall of the telescopic groove (431) is recessed inward to form a limiting groove (432), a clamping block (433) is further installed in the telescopic groove (431), and a limiting strip (434) matching the limiting groove (432) extends around the end of the clamping block (433), and a compression spring (435) is installed in the telescopic groove (431) between the end of the clamping block (433) and the bottom of the telescopic groove (431), and the clamping block (433) is clamped into the clamping hole (23) when the connecting column (42) moves downward.

3. The multi-locking bolt according to claim 2, characterized in that: The bottom of one side of the clamping block (433) is an inclined surface, and the clamping block assembly (43) is provided with two groups, and the clamping holes (23) are provided with two groups corresponding thereto, and two mounting grooves (22) are provided at positions corresponding to the clamping holes (23), and two elastic members (5) are installed therein. The lower clamping block assembly (43) and the upper clamping block assembly (43) are arranged in a staggered manner, and the protruding length of the clamping block (433) exceeds the front end clamping mouth of the clamping hole (23).

4. The multi-locking bolt according to claim 1, characterized in that: The block assembly (43) below is arranged on the outer wall of a positioning base (44) extending from the bottom of the connecting column (42), and a plurality of positioning blocks (45) are connected to the outer wall of the positioning base (44). The block assembly (43) is arranged in the positioning block (45), and the bottom of the stud (2) matches the positioning block (45) and the positioning base (44) and is provided with a positioning groove (24).

5. The multi-locking bolt according to claim 1, characterized in that: The bolt head (1) is hexagonal in shape as a whole, and a plurality of evenly arranged anti-skid ridges (13) are provided on the outer wall of the bolt head (1), and a connecting block (14) is provided at the junction of the anti-skid ridges (13) on each side, and the outer wall of the connecting block (14) is a symmetrical arc surface, and the side connection of the bolt head (1) is also an arc surface.

6. The multi-locking bolt according to claim 1, characterized in that: A mounting ring groove (15) is provided at the connection position between the bottom of the bolt head (1) and the stud (2), a washer (6) is installed in the mounting ring groove (15), and a plurality of evenly spaced annular ridges (61) are provided on the outer surface of the bottom of the washer (6), and the plurality of annular ridges (61) are concentrically arranged.

7. The multi-locking bolt according to claim 1, characterized in that: A positioning ring groove (25) is provided at the bottom of the stud (2) above the installation position of the elastic member (5), and the positioning ring groove (25) matches the elastic member (5) below. A matching annular plate (51) is provided on the top of the elastic member (5). The groove depth of the installation groove (22) on the outer wall of the stud (2) matches the thickness of the elastic member (5), and is flush with the outer surface of the stud (2) after installation. The outer surfaces of multiple elastic members (5) are provided with threads that match the outer surface of the stud (2).

8. The multi-locking bolt according to claim 1, characterized in that: A cross groove (46) is recessed inwardly at the center of the top of the mounting head (41), and symmetrical vertical plates (47) are provided on both sides of the top of the mounting head (41). Through holes (48) of the same size are provided on the vertical plates (47).

9. The multi-locking bolt according to claim 1, characterized in that: The nut (3) is provided with a fastening ring groove (31) of the same size on the upper and lower sides, and a fastening washer (32) is installed in the fastening ring groove (31) on both sides. The docking surface of the fastening washer (32) is provided with a plurality of anti-slip strips (33), and the plurality of anti-slip strips (33) are concentrically arranged.

10. A method for installing a multiple locking bolt according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. Insert the upper elastic member (5) into the mounting groove (22) on the outer wall of the stud (2), align the surface thread of the elastic member (5) with the outer thread of the stud (2), and make the outer surface flat after installation. The annular plate (51) on the top of the lower elastic member (5) is aligned and fixed with the positioning ring groove (25); S2, fix the fastening washer (32) on one side of the butt joint surface of the nut (3); S3. Completely install the bolt head (1) and the stud (2) in the screw hole of the object to be fixed, and then tighten the nut (3) so that the upper fastening washer (32) contacts the contact surface of the object to be fixed; S4. Insert the fastening assembly (4) into the first mounting hole (11) and the second mounting hole (21). During the insertion, rotate the connecting column (42) so that the lower clamping block assembly (43) passes over the upper clamping hole (23) and docks with the lower clamping hole (23) until the corresponding clamping block (433) is clamped into the corresponding clamping hole (23); S5. Use an external tool to rotate the cross groove (46) on the mounting head (41), insert the connecting column (42) into the stud (2), and squeeze the elastic member (5) to complete the locking of the upper and lower layers.

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