A self-locking anti-loosening hardware fastener

Abstract

The utility model discloses a kind of anti-loosening hardware fastener with self-locking function, comprising: bolt, the screw rod of bolt is equipped with thread groove, the thread groove is threadedly installed with locking mechanism, the locking end of locking mechanism is rotated and passes out from the lower surface of screw rod, locking mechanism can be rotated into thread hole with bolt, and can be expanded outward when rotating top contact to bottom to realize the position locking of bolt. The application is designed by locking mechanism, so that it can automatically exert mechanical bite type locking function between it and thread hole during the process of screwing, significantly improve the anti-loosening effect, and the design can also adapt to thread holes of different depths through adjustable extension structure, with versatility and reliability.

Description

Technical Field

[0001] This utility model relates to the field of hardware fastener technology, specifically to a self-locking anti-loosening hardware fastener. Background Technology

[0002] In all areas of modern industry and daily life, the stable connection of components is always the foundation for building reliable structures. As the core component for achieving this connection, hardware fasteners, though small in size, shoulder an indispensable mission—from the assembly of precision machinery to the construction of grand buildings, from high-speed cars to everyday furniture, they silently maintain the stability and functionality of objects with their diverse forms and reliable performance.

[0003] For example, Chinese Patent No. CN209340322U discloses a novel hardware fastener, specifically relating to the hardware field. It includes a fixing sleeve with a baffle ring at its top, a fixing post at its top, a first internal threaded hole inside the fixing post, a fixing block connected to its top, a hanging ring connected to its top, and a first external thread on the bottom outer surface of the fixing block. A fixing rod is connected to the bottom of the fixing sleeve, with second external threads on both its bottom and top outer surfaces, and a second internal threaded hole in its middle. This invention has a scientifically sound and reasonable structure, is safe and convenient to use, improves the overall utilization rate of the fastener, prevents oxidation damage to the bolt connection due to prolonged contact with air, and facilitates fastener suspension through the easily adjustable hanging ring. It also allows for the lifting and movement of connected objects using multiple fasteners.

[0004] However, the aforementioned new hardware fasteners cannot automatically apply a self-locking anti-loosening function to the bolts during the tightening process. Fasteners lacking self-locking function require regular manual checks of the tightening status, such as using a torque wrench to check the preload, which leads to cumbersome operation and low reliability. Utility Model Content

[0005] The purpose of this utility model is to provide a self-locking anti-loosening hardware fastener to solve the problem mentioned in the background art that it is not possible to automatically apply a self-locking anti-loosening function to the bolt during the tightening process.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A self-locking anti-loosening hardware fastener includes: a bolt, wherein a threaded groove is formed in the bolt shank, and a locking mechanism is threadedly installed in the threaded groove. The locking end of the locking mechanism rotates out from the lower surface of the bolt shank. The locking mechanism can be screwed into the threaded hole along with the bolt, and can expand outward when the top of the screw is rotated to the bottom to lock the position of the bolt.

[0008] Preferably, a connecting disc is fixedly installed on the outer surface of the bolt, a connecting ring is rotatably installed on the outer surface of the connecting disc, a spring is fixedly connected to the lower surface of the connecting ring, a pressure ring is fixedly connected to the lower surface of the spring, and the pressure ring is fitted onto the outer surface of the bolt thread.

[0009] Preferably, the locking mechanism includes a disc and a rotating tube, which are rotatably installed in a T-shaped rotating hole. The T-shaped rotating hole is opened in the upper half of the bolt and communicates with the threaded groove at the lower end. An extension column is slidably installed in the rotating tube, and a threaded rod is fixedly installed on the lower surface of the extension column. The threaded rod is threadedly installed in the threaded groove.

[0010] Preferably, a guide block is fixedly installed inside the rotating tube, and the guide block is slidably installed in the guide groove, which is opened on the outer surface of the extension column.

[0011] Preferably, the lower surface of the threaded rod rotates out of the threaded groove and is fixedly installed with multiple sets of shaped plates, and the outer surface of the shaped plates is fixedly installed with protruding teeth.

[0012] Preferably, the inner surface of the shaped plate has an embedded arc-shaped groove in the bending portion, so that when the shaped plate is bent under pressure, it can be precisely bent from the middle section, and the bent shaped plate can be precisely pushed to push the protruding teeth to contact the threaded hole.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. Through the design of bolts, connecting rings, spring clips, pressure rings, connecting discs, threaded grooves, and locking mechanisms, during installation, workers can screw the bolts into the threaded holes. At this time, the connecting rings, spring clips, and pressure rings on the outer surface of the connecting disc can rotate flexibly. Subsequently, as the bolts continue to rotate, they can drive the pressure rings to initially contact the workpiece or the ground. Continued rotation of the pressure rings allows the connecting discs to drive the connecting rings on the outer surface to press against the spring clips connected to the pressure rings. This allows the spring clips to apply an upward spring force to the bolts, increasing the tension between the bolts and the threaded holes. The frictional force is used to achieve initial anti-loosening. During the process of the top pressure ring touching the ground, it also drives the locking mechanism on the lower surface of the bolt to touch the lower surface of the threaded hole. As it continues to rotate, the locking mechanism is pushed open and then touches the inner ring wall of the threaded hole, forming a mechanical lock similar to a tenon and mortise structure. Compared with relying solely on friction to prevent loosening, this physical embedding method can greatly improve the anti-loosening performance, effectively limiting the rotation and axial movement of the bolt under complex working conditions such as vibration and impact, and reducing the risk of loosening.

[0015] 2. Through the design of disc, rotating tube, extension column, threaded rod, shaped plate, convex tooth and arc ring groove, when the bolt rotates to the bottom in the threaded hole, the threaded rod installed in the threaded groove will drive the shaped plate on the lower surface to contact the bottom of the threaded hole. As the bolt continues to rotate, the shaped plate will be subjected to an upward reaction force and begin to bend. Due to the arc ring groove design of the bending part of the inner surface of the shaped plate, it can bend precisely from the middle section, thereby pushing the convex tooth outward and contacting the inner wall of the threaded hole to lock the position of the bolt.

[0016] If the threaded hole is deep, the disc can be turned while the bolt is tightened, causing the rotating tube to rotate within the T-shaped hole. The rotating tube, via an internally fixed guide block, drives the threaded rod fixedly mounted on the lower surface of the extension column to rotate and move downwards within the threaded groove. The downward movement of the extension column then slides down the outer surface of the guide block within the rotating tube via the guide groove on its outer surface. The threaded rod, unscrewed from the threaded groove, drives the ">" shaped plate fixedly mounted on the lower surface to extend downwards within the threaded hole until the threaded rod, along with the ">" shaped plate, reaches and touches the top of the threaded hole. At the inner bottom, continuing to rotate the disc allows the >-shaped plate to bend and expand under the reaction force from the bottom, forming a mechanical engagement with the inner ring wall of the threaded hole, significantly improving the anti-loosening effect. The cooperation between the guide block and the guide groove ensures the linear movement of the extension column, avoiding locking failure caused by deviation. During disassembly, the disc can be rotated in the opposite direction to retract the >-shaped plate, releasing the lock on the inner wall of the threaded hole, allowing the bolt to be easily removed. This design, through its adjustable extension structure, allows it to adapt to threaded holes of different depths, combining versatility and reliability. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the connecting ring, spring piece, and top pressure ring of this utility model;

[0019] Figure 3 This is a schematic diagram of the locking mechanism of this utility model.

[0020] In the diagram: 1. Bolt; 101. Connecting ring; 102. Spring; 103. Top pressure ring; 104. Connecting disc; 105. Threaded groove; 106. T-shaped rotating hole; 2. Locking mechanism; 201. Disc; 202. Rotary tube; 203. Extension column; 204. Guide block; 205. Guide groove; 206. Threaded rod; 207. Raised tooth; 208. Arc ring groove; 209. >-shaped plate. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figures 1-3 This utility model provides a technical solution:

[0023] like Figures 1-2 As shown, a self-locking anti-loosening hardware fastener includes: a bolt 1, a threaded groove 105 is provided in the screw of the bolt 1, a locking mechanism 2 is threadedly installed in the threaded groove 105, the locking end of the locking mechanism 2 rotates out from the lower surface of the screw, the locking mechanism 2 can be screwed into the threaded hole together with the bolt 1, and can expand outward when the top of the rotation touches the bottom to lock the position of the bolt 1.

[0024] A connecting plate 104 is fixedly installed on the outer surface of bolt 1. A connecting ring 101 is rotatably installed on the outer surface of the connecting plate 104. A spring piece 102 is fixedly connected to the lower surface of the connecting ring 101. A top pressure ring 103 is fixedly connected to the lower surface of the spring piece 102. The top pressure ring 103 is fitted onto the outer surface of the bolt 1.

[0025] Through the design of bolt 1, connecting ring 101, spring 102, pressing ring 103, connecting disc 104, threaded groove 105, and locking mechanism 2, during installation, the operator can screw bolt 1 into the threaded hole. At this time, the connecting ring 101, spring 102, and pressing ring 103 on the outer surface of the connecting disc 104 can rotate flexibly. Subsequently, as bolt 1 continues to rotate, it can drive the pressing ring 103 to first contact the workpiece or the ground. Then, by allowing it to continue rotating, the connecting disc 104 can drive the connecting ring 101 on its outer surface to press against the spring 102 connected to the pressing ring 103. This allows the spring 102 to apply an upward spring force to bolt 1. The thrust increases the friction between the bolt 1 and the threaded hole to achieve initial anti-loosening. As the top pressure ring 103 touches the ground, it also drives the locking mechanism 2 on the lower surface of the bolt 1 to touch the lower surface of the threaded hole. With continuous rotation, the locking mechanism 2 is pushed open and then touches the inner ring wall of the threaded hole, forming a mechanical lock similar to a tenon and mortise structure. Compared with relying solely on friction to prevent loosening, this physical embedding method can greatly improve the anti-loosening performance, effectively limiting the rotation and axial movement of the bolt under complex working conditions such as vibration and impact, and reducing the risk of loosening.

[0026] like Figure 3 As shown, the locking mechanism 2 includes a disc 201 and a rotating tube 202. The disc 201 and the rotating tube 202 are rotatably installed in a T-shaped rotating hole 106. The T-shaped rotating hole 106 is opened in the upper half of the bolt 1 and is connected to the threaded groove 105 at the lower end. An extension post 203 is slidably installed in the rotating tube 202. A threaded rod 206 is fixedly installed on the lower surface of the extension post 203. The threaded rod 206 is threadedly installed in the threaded groove 105.

[0027] A guide block 204 is fixedly installed inside the rotating tube 202. The guide block 204 is slidably installed in the guide groove 205, which is located on the outer surface of the extension column 203.

[0028] The lower surface of the threaded rod 206 rotates out of the threaded groove 105 and is fixedly installed with multiple sets of shaped plates 209, and the outer surface of the shaped plates 209 is fixedly installed with protruding teeth 207.

[0029] The inner surface of the shaped plate 209 has an embedded arc groove 208 for the bending portion, so that when the shaped plate 209 is bent under pressure, it can be accurately started from the middle section, and the bent shaped plate 209 can be accurately pushed to push the protrusion 207 to contact the threaded hole.

[0030] Through the design of the disc 201, rotating tube 202, extension column 203, threaded rod 206, shaped plate 209, protruding tooth 207 and arc ring groove 208, when the bolt 1 rotates to the bottom in the threaded hole, the threaded rod 206 installed in the threaded groove 105 will drive the shaped plate 209 on the lower surface to contact the bottom of the threaded hole. As the bolt 1 continues to rotate, the shaped plate 209 can be subjected to an upward reaction force and begin to bend. Due to the design of the arc ring groove 208 on the inner surface of the shaped plate 209, it can bend precisely from the middle section, thereby pushing the protruding tooth 207 outward and pressing against the inner wall of the threaded hole to lock the position of the bolt 1.

[0031] If the threaded hole is deep, the disc 201 can be rotated while the bolt 1 is tightened, causing the rotating tube 202 to rotate within the T-shaped rotating hole 106. The rotating tube 202, through the internally fixed guide block 204, causes the threaded rod 206, fixedly mounted on the lower surface of the extension column 203, to rotate and move downward within the threaded groove 105. The downward movement of the extension column 203 can then slide down the outer surface of the guide block 204 within the rotating tube 202 via the guide groove 205 on its outer surface. The threaded rod 206, which unscrews out from the threaded groove 105, can then cause the shaped plate 209, fixedly mounted on the lower surface, to extend downward within the threaded hole until the threaded rod 206 drives the lower surface... The extended plate 209 extends to the bottom of the threaded hole. Continuing to rotate the disc 201 allows the extended plate 209 to bend under the reaction force from the bottom and expand, forming a mechanical engagement on the inner ring wall of the threaded hole, significantly improving the anti-loosening effect. The cooperation between the guide block 204 and the guide groove 205 ensures the linear movement of the extension column 203, avoiding locking failure due to offset. During disassembly, the disc 201 can be rotated in the opposite direction to retract the extended plate 209, releasing the lock on the inner wall of the threaded hole, allowing easy removal of bolt 1. This design, through its adjustable extension structure, can adapt to threaded holes of different depths, combining versatility and reliability.

[0032] Based on the above technical solution, the working steps of this solution are summarized as follows: During installation, the operator can screw the bolt 1 into the threaded hole. At this time, the connecting ring 101, spring piece 102, and pressure ring 103 on the outer surface of the connecting disc 104 can rotate flexibly. Subsequently, as the bolt 1 continues to rotate, it can drive the pressure ring 103 to first contact the workpiece or the ground. Then, by allowing it to continue rotating, the connecting disc 104 can drive the connecting ring 101 on the outer surface to press against the spring piece 102 connected to the pressure ring 103, thereby allowing the spring piece 102 to apply an upward spring force to the bolt 1. This spring force can increase the friction between the bolt 1 and the threaded hole to achieve initial anti-loosening. During the process of the top pressure ring 103 touching the ground, it will also drive the >-shaped plate 209 fixedly installed on the lower surface of the internal thread rod 206 of the bolt 1 to contact the bottom of the threaded hole. As the bolt 1 continues to rotate, the >-shaped plate 209 will be subjected to an upward reaction force and begin to bend. Due to the design of the arc ring groove 208 of the bending part of the inner surface of the >-shaped plate 209, it can bend precisely from the middle section, thereby pushing the convex tooth 207 outward and touching the inner wall of the threaded hole to lock the position of the bolt 1.

[0033] If the threaded hole is deep, the disc 201 can be rotated while the bolt 1 is tightened, causing the rotating tube 202 to rotate within the T-shaped rotating hole 106. The rotating tube 202, through the internally fixed guide block 204, causes the threaded rod 206, fixedly mounted on the lower surface of the extension column 203, to rotate and move downward within the threaded groove 105. The downward movement of the extension column 203 allows it to slide down the outer surface of the guide block 204 within the rotating tube 202 via the guide groove 205 on its outer surface, and then rotate out of the threaded groove 105. The threaded rod 206 can drive the shaped plate 209 fixedly installed on the lower surface to extend downward in the threaded hole until the threaded rod 206 drives the shaped plate 209 on the lower surface to extend and touch the bottom of the threaded hole. At this time, the continued rotation of the disc 201 can cause the shaped plate 209 to bend and expand under the reaction force at the bottom, and touch the inner ring wall of the threaded hole to form a mechanical engagement. When disassembling, the disc 201 can be rotated in the opposite direction to retract the shaped plate 209, release the lock on the inner wall of the threaded hole, and the bolt 1 can be easily removed.

[0034] In summary: During the tightening process of bolt 1, it can automatically apply a mechanical locking function between it and the threaded hole, which significantly improves the anti-loosening effect. In addition, the adjustable extension structure allows it to adapt to threaded holes of different depths, combining versatility and reliability.

[0035] All parts not described in this utility model are the same as or can be implemented using existing technology. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this utility model, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A self-locking anti-loosening hardware fastener, characterized in that, include: Bolt (1), the bolt (1) has a threaded groove (105) inside the screw, and a locking mechanism (2) is threaded in the threaded groove (105). The locking end of the locking mechanism (2) rotates out from the lower surface of the screw. The locking mechanism (2) can be screwed into the threaded hole along with the bolt (1), and can expand outward when it is rotated to the bottom to lock the position of the bolt (1).

2. The anti-loosening hardware fastener with self-locking function according to claim 1, characterized in that: A connecting disc (104) is fixedly installed on the outer surface of the bolt (1). A connecting ring (101) is rotatably installed on the outer surface of the connecting disc (104). A spring piece (102) is fixedly connected to the lower surface of the connecting ring (101). A top pressure ring (103) is fixedly connected to the lower surface of the spring piece (102). The top pressure ring (103) is fitted onto the outer surface of the bolt (1).

3. The anti-loosening hardware fastener with self-locking function according to claim 1, characterized in that: The locking mechanism (2) includes a disc (201) and a rotating tube (202). The disc (201) and the rotating tube (202) are rotatably installed in a T-shaped rotating hole (106). The T-shaped rotating hole (106) is opened in the upper half of the bolt (1) and communicates with the threaded groove (105) at the lower end. An extension column (203) is slidably installed in the rotating tube (202). A threaded rod (206) is fixedly installed on the lower surface of the extension column (203). The threaded rod (206) is threaded in the threaded groove (105).

4. The anti-loosening hardware fastener with self-locking function according to claim 3, characterized in that: A guide block (204) is fixedly installed inside the rotating tube (202). The guide block (204) is slidably installed in the guide groove (205), which is located on the outer surface of the extension column (203).

5. A self-locking anti-loosening hardware fastener according to claim 3, characterized in that: The lower surface of the threaded rod (206) rotates out of the threaded groove (105) and is fixedly installed with multiple sets of shaped plates (209), and the outer surface of the shaped plates (209) is fixedly installed with protruding teeth (207).

6. A self-locking anti-loosening hardware fastener according to claim 5, characterized in that: The inner surface of the shaped plate (209) is provided with an embedded arc groove (208) so that when the shaped plate (209) is bent under pressure, it can be precisely bent from the middle section, and thus the bent shaped plate (209) can be precisely pushed to push the protruding tooth (207) to contact the threaded hole.

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