A type of anti-loosening fastener

Abstract

This utility model provides an anti-loosening fastener, relating to the field of fasteners. The utility model includes a retaining box. The fastening strap and retaining box are fitted onto the outer surface of one of the pipes. Two pipes are then fitted together, and the fastening strap is moved to the interface. Next, a U-shaped block is held and pulled upwards on a support, causing the retaining block to move to one end and pull out from several protrusions, causing a spring to contract. Then, a worm gear can be turned inside the retaining box, causing its outer surface to engage with the irregular holes on the fastening strap, tightening one end of the fastening strap and thus connecting and fixing the two pipes. At this point, the U-shaped block is released, allowing the retaining block to engage between two corresponding protrusions under the return action of the spring, limiting and fixing the rotated worm gear, thus performing a secondary fixation. This makes the fastening strap more secure when connecting and fixing the pipes, less prone to reverse loosening, and improves the stability and safety of the connection.

Description

Technical Field

[0001] This utility model relates to the field of fasteners, and in particular to an anti-loosening fastener. Background Technology

[0002] Fasteners are mechanical fasteners whose main function is to securely connect two or more parts together to ensure that these parts do not loosen or separate during operation.

[0003] When using fasteners to connect and secure two pipes, the fastening tape and clamp are typically first fitted onto the outer surface of one pipe. Then, the two pipes are fitted together, the fastening tape is moved to the joint, and the worm gear is rotated inside the clamp, causing its outer surface to engage with the irregular holes on the fastening tape. This tightens one end of the fastening tape, thus connecting and securing the two pipes. However, existing fasteners rely heavily on the meshing friction between the worm gear and the irregular holes to adjust the tightness of the fastening tape. Over long-term use, pressure fluctuations of the internal medium, continuous equipment vibration, and material deformation caused by changes in ambient temperature can all lead to the failure of this limiting mechanism. This can cause the fastening tape to loosen, potentially resulting in pipe joint leaks, insecure connections, and even safety accidents and equipment malfunctions, affecting the stability and safety of the entire system. Utility Model Content

[0004] The technical problem this invention aims to solve is that existing fasteners rely heavily on the meshing friction between the worm and the irregular holes to limit the tightness of the fastening band after the worm rotates and meshes with several irregular holes. In long-term use, pressure fluctuations of the medium inside the pipeline, continuous vibration of the equipment, and material deformation caused by changes in ambient temperature can all lead to the failure of this limiting mechanism, resulting in the fastening band loosening. This can ultimately lead to pipeline joint leakage, insecure connections, and even safety accidents and equipment failures, affecting the stability and safety of the entire system.

[0005] The technical solution adopted by this utility model to solve its technical problem is: an anti-detachment fastener, including a card box, a fastening band fixedly installed on one side of the card box, wherein one end of the fastening band is inserted into the inner wall of one side of the card box, the outer surface of the fastening band is provided with a plurality of irregular holes, a worm gear is installed through the inner wall of the card box, wherein the outer surface of the worm gear meshes with the inner wall of the irregular holes, and an anti-detachment device is provided between the outer surface of one end of the worm gear and one side of the card box. The anti-detachment device can be used to limit and fix the worm gear after rotation by installing a plurality of protrusions on the outer surface of the worm gear, and then using a locking block and a limiting block to be inserted between the plurality of protrusions.

[0006] Preferably, the anti-fall-off device includes a plurality of protrusions, wherein one side of the protrusions is fixedly mounted on the outer surface of one end of the worm gear; a bracket, wherein one side of the bracket is fixedly mounted on one side of the card box; a U-shaped block, wherein both ends of the U-shaped block are mounted through and on one side of the bracket; a locking block, wherein one side of the locking block is fixedly mounted on one side of both ends of the U-shaped block; and two springs, wherein the inner walls of the two springs are respectively sleeved on the outer surfaces of both ends of the U-shaped block, and both ends are respectively fixedly mounted on one side of the bracket and one side of the locking block.

[0007] The effect achieved by the above-mentioned components is as follows: By setting up an anti-detachment device, when using fasteners to connect and fix two pipes, the fastening strap and clamping box are usually first placed on the outer surface of one of the pipes. After the two pipes are put together, the fastening strap is moved to the interface. The U-shaped block is held and pulled upward on the bracket to a certain distance, causing the clamping block to move to one end and pull out from several protrusions. This causes the spring to contract, and then the worm gear can be turned inside the clamping box to rotate a certain number of times. Then, its outer surface engages and rotates in the irregular hole on the fastening strap, tightening one end of the fastening strap and thus connecting and fixing the two pipes. At this time, the U-shaped block is released, and the clamping block can be locked between the corresponding two protrusions under the reset action of the spring. The rotated worm gear is limited and fixed, and a secondary fixation is performed, making the fastening strap more secure when connecting and fixing the pipes, less prone to reverse loosening, and improving the stability and safety of the connection.

[0008] Preferably, the anti-fall-off device further includes two reinforcing rods, wherein the two sides of the reinforcing rods are respectively fixedly installed on one side of the bracket and one side of the card box.

[0009] The effect achieved by the above components is that by setting up reinforcing rods, the connection area between the bracket and the card box can be increased, making the connection more secure and less prone to breakage or damage.

[0010] Preferably, the anti-fall-off device further includes a rotating rod, wherein one end of the rotating rod is rotatably mounted on one side of the card box, and the other end is inserted into the inner wall of the U-shaped block.

[0011] The effect achieved by the above-mentioned components is as follows: by setting the rotating rod, when it is necessary to rotate the worm gear, the U-shaped block can be manually pulled upward on the bracket to a certain position, which will drive the locking block to be pulled out from several protrusions. Then, the rotating rod can be rotated to a certain angle so that one end of it is inserted into the inner wall of the U-shaped block, which can limit and fix the U-shaped block and the pulled-out locking block. This makes it convenient to manually rotate and adjust the worm gear, so that it is not necessary to manually pull the locking block all the time during adjustment.

[0012] Preferably, one end of the locking block has a trapezoidal longitudinal section, and the trapezoidal end of the locking block is located at the end away from the spring.

[0013] The effect achieved by the above-mentioned components is that by setting one end of the card block into a trapezoidal shape, the area of ​​one end of the card block can be reduced, making it easier to insert the card block into the space between several protrusions when it is positioned, thus facilitating operation.

[0014] Preferably, the anti-drop device further includes an L-shaped block, wherein one side of the L-shaped block is fixedly installed on one side of the card box; a limiting block, wherein one side of the limiting block is rotatably installed on one side of the L-shaped block, and one side abuts against one end of the L-shaped block and one side of the protrusion; and a torsion spring, wherein the inner wall of the torsion spring is sleeved on the outer surface of one end of the limiting block, and both ends are fixedly installed on one side of the L-shaped block and one side of the limiting block, respectively.

[0015] The effect achieved by the above components is as follows: By setting L-shaped blocks and limiting blocks, when the worm gear is rotated to tighten the fastening band, several protrusions will rotate along with the rotation of the worm gear. When they rotate to a certain position, they will abut against the limiting block on the L-shaped block and rotate, causing the torsion spring to deform. When the protrusions are completely removed from the limiting block, the torsion spring will drive the limiting block to reset, so that one side of it abuts against one end of the L-shaped block. In this way, if the worm gear reverses, the limiting block will abut against one side of the protrusion, thereby locking and fixing it. Similarly, when it is necessary to remove it, simply rotate the limiting block to one end and completely remove it from among the protrusions, so that the worm gear can be rotated and loosened for easy removal. By fixing the worm gear in this way, the fastening band can be more firmly fixed when connecting and fixing the pipeline, making it less likely to reverse and loosen, thus improving the stability and safety of the connection.

[0016] Preferably, the anti-fall-off device further includes several round rollers, which are equidistantly mounted on the outer surface of one end of the limiting block.

[0017] The effect achieved by the above components is that by setting the circular roller, the contact friction between one end of the limiting block and the protrusion can be reduced, avoiding wear and improving the service life of both.

[0018] The beneficial effects of this utility model are:

[0019] By setting up an anti-detachment device, when using fasteners to connect and fix two pipes, the fastening strap and clamping box are usually first placed on the outer surface of one of the pipes. After the two pipes are placed together, the fastening strap is moved to the interface. The U-shaped block is then held and pulled upwards on the support to a certain distance, causing the clamping block to move to one end and pull out from several protrusions. This causes the spring to contract, and the worm gear can be turned inside the clamping box a certain number of times. Then, its outer surface engages with the irregular hole on the fastening strap, tightening one end of the fastening strap and thus connecting and fixing the two pipes. At this point, the U-shaped block is released, allowing the clamping block to engage between the corresponding two protrusions under the return action of the spring. The rotated worm gear is then limited and fixed, providing a secondary fixation. This makes the fastening strap more secure when connecting and fixing the pipes, preventing reverse loosening and improving the stability and safety of the connection. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Figure 1 This is a schematic diagram of the structure of this utility model.

[0022] Figure 2 This is a three-dimensional structural diagram of the card box of this utility model;

[0023] Figure 3 for Figure 2 A three-dimensional schematic diagram of a local structure;

[0024] Figure 4 for Figure 3 An enlarged 3D structural diagram at point A in the middle;

[0025] Figure 5 This is a three-dimensional structural diagram of the fastening strap of this utility model;

[0026] Figure 6 for Figure 5 A three-dimensional schematic diagram of a local structure.

[0027] Legend: 1. Card box; 2. Anti-fall device; 3. Fastening belt; 4. Irregular hole; 5. Worm gear; 21. Protrusion; 22. Bracket; 23. U-shaped block; 24. Locking block; 25. Spring; 26. Reinforcing rod; 27. Rotating rod; 28. L-shaped block; 29. ​​Limiting block; 210. Torsion spring; 211. Circular roller. Detailed Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] Example 1, Figure 1-6 The fastener shown includes a housing 1, with a fastening band 3 fixedly installed on one side of the housing 1. One end of the fastening band 3 is inserted into the inner wall of one side of the housing 1. The outer surface of the fastening band 3 has several irregular holes 4. A worm gear 5 is installed through the inner wall of the housing 1, with the outer surface of the worm gear 5 meshing with the inner wall of the irregular holes 4. An anti-detachment device 2 is provided between the outer surface of one end of the worm gear 5 and one side of the housing 1. The anti-detachment device 2 can be installed by installing several protrusions 21 on the outer surface of the worm gear 5, and then using a locking block 24 and a limiting block 29 to be inserted between the protrusions 21 to limit and fix the worm gear 5 after rotation.

[0031] Example 1,

[0032] Figure 1-6The anti-fall-off device 2 shown includes several protrusions 21, one side of which is fixedly mounted on the outer surface of one end of the worm gear 5; a bracket 22, one side of which is fixedly mounted on one side of the card box 1; a U-shaped block 23, both ends of which are mounted through the bracket 22 on one side; a locking block 24, one side of which is fixedly mounted on one side of both ends of the U-shaped block 23; and two springs 25, the inner walls of which are respectively sleeved on the outer surfaces of both ends of the U-shaped block 23, and both ends are respectively fixedly mounted on one side of the bracket 22 and one side of the locking block 24. By setting the anti-detachment device 2, when using fasteners to connect and fix two pipes, the fastening band 3 and the clamping box 1 are usually first placed on the outer surface of one of the pipes. After the two pipes are put together, the fastening band 3 is moved to the interface. The U-shaped block 23 is held and pulled upward on the bracket 22 to a certain distance, which drives the clamping block 24 to move to one end and pull it out from several protrusions 21. This causes the spring 25 to contract. Then, the worm gear 5 can be turned inside the clamping box 1 to rotate a certain number of turns. Then, its outer surface engages and rotates in the irregular hole 4 on the fastening band 3, tightening one end of the fastening band 3, thereby connecting and fixing the two pipes. At this time, the U-shaped block 23 is released, and the clamping block 24 can be inserted between the corresponding two protrusions 21 under the reset action of the spring 25. The rotated worm gear 5 is limited and fixed, and a secondary fixation is performed, making the fastening band 3 more secure when connecting and fixing the pipes, less prone to reverse loosening, and improving the stability and safety of the connection.

[0033] Figure 1-6 The anti-detachment device 2 also includes two reinforcing rods 26, with their two sides fixedly installed on one side of the bracket 22 and the other side of the card box 1, respectively. By providing the reinforcing rods 26, the connection area between the bracket 22 and the card box 1 can be increased, making the connection more secure and less prone to breakage. The anti-detachment device 2 also includes a rotating rod 27, one end of which is rotatably installed on one side of the card box 1, while the other end is inserted into the inner wall of the U-shaped block 23. By providing the rotating rod 27, when the worm gear 5 needs to be rotated, the U-shaped block 23 can be manually pulled upwards on the bracket 22 to a certain position, causing the card block 24 to be pulled out from among the protrusions 21. Then, the rotating rod 27 can be rotated to a certain angle, causing one end to insert into the inner wall of the U-shaped block 23, thus limiting and fixing the U-shaped block 23 and the pulled-out card block 24. This facilitates manual adjustment of the worm gear 5, eliminating the need to constantly manually pull the card block 24 during adjustment. One end of the locking block 24 has a trapezoidal cross-section, and this trapezoidal end is located at the end furthest from the spring 25. By making one end of the locking block 24 trapezoidal, the area of ​​one end of the locking block 24 can be reduced, making it easier to insert the locking block 24 into the space between several protrusions 21 for positioning, thus facilitating operation.

[0034] Example 2,

[0035] Figure 1-6 The anti-fall-off device 2 shown also includes an L-shaped block 28, one side of which is fixedly installed on one side of the card box 1; a limiting block 29, one side of which is rotatably installed on one side of the L-shaped block 28, and one side abuts against one end of the L-shaped block 28 and one side of the protrusion 21; and a torsion spring 210, the inner wall of which is sleeved on the outer surface of one end of the limiting block 29, and both ends are fixedly installed on one side of the L-shaped block 28 and one side of the limiting block 29, respectively. By setting up L-shaped block 28 and limiting block 29, when the worm gear 5 is rotated to tighten the fastening band 3, several protrusions 21 will rotate along with the rotation of the worm gear 5. When they rotate to a certain position, they will abut against the limiting block 29 on the L-shaped block 28 and rotate, causing the torsion spring 210 to deform. When the protrusions 21 are completely removed from the limiting block 29, the torsion spring 210 will drive the limiting block 29 to reset and abut against one end of the L-shaped block 28. In this way, if the worm gear 5 reverses, the limiting block 29 will abut against one side of the protrusions 21, thereby locking and fixing them. Similarly, when it is necessary to remove them, simply rotate the limiting block 29 to one end and completely remove it from among the protrusions 21, so that the worm gear 5 can be rotated and loosened for easy removal. By fixing the worm gear 5 in this way, the fastening band 3 can be more firmly fixed when connecting and fixing the pipeline, making it less prone to reverse loosening and improving the stability and safety of the connection.

[0036] Figure 1-6 The anti-detachment device 2 shown also includes several rollers 211, which are rotatably mounted at equal intervals on the outer surface of one end of the limiting block 29. By setting the rollers 211, the contact friction between one end of the limiting block 29 and the protrusion 21 can be reduced, avoiding wear and improving the service life of both.

[0037] Working principle: By setting the anti-detachment device 2, when using fasteners to connect and fix two pipes, the fastening band 3 and the clamping box 1 are usually first placed on the outer surface of one of the pipes. After the two pipes are put together, the fastening band 3 is moved to the interface. The U-shaped block 23 is held and pulled upward on the bracket 22 to a certain distance, which drives the clamping block 24 to move to one end and pull it out from several protrusions 21. This causes the spring 25 to contract. Then, the worm gear 5 can be turned inside the clamping box 1 to rotate a certain number of turns. Then, its outer surface engages and rotates in the irregular hole 4 on the fastening band 3, tightening one end of the fastening band 3, thereby connecting and fixing the two pipes. At this time, the U-shaped block 23 is released, and the clamping block 24 can be inserted between the corresponding two protrusions 21 under the reset action of the spring 25. The rotated worm gear 5 is limited and fixed, and a secondary fixation is performed, making the fastening band 3 more secure when connecting and fixing the pipes, less prone to reverse loosening, and improving the stability and safety of the connection.

[0038] Alternatively, when the worm gear 5 is rotated to tighten the fastening band 3, several protrusions 21 will rotate along with the worm gear 5. When they rotate to a certain position, they will abut against the limiting block 29 on the L-shaped block 28 and rotate, causing the torsion spring 210 to deform. When the protrusions 21 are completely removed from the limiting block 29, the torsion spring 210 will cause the limiting block 29 to reset and abut against one end of the L-shaped block 28. In this way, if the worm gear 5 reverses, the limiting block 29 will abut against one side of the protrusion 21, thereby locking and fixing it. Similarly, when it needs to be removed, simply rotate the limiting block 29 to one end and completely remove it from among the protrusions 21, so that the worm gear 5 can be rotated and loosened for easy removal. By fixing the worm gear 5 in this way, the fastening band 3 can be more secure when connecting and fixing the pipeline, making it less prone to reverse loosening and improving the stability and safety of the connection.

[0039] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A non-releasable fastener comprising a cartridge (1) characterised in that: A fastening strap (3) is fixedly installed on one side of the card box (1), with one end of the fastening strap (3) inserted into the inner wall of one side of the card box (1). The outer surface of the fastening strap (3) is provided with several irregular holes (4). A worm gear (5) is installed through the inner wall of the card box (1), with the outer surface of the worm gear (5) meshing with the inner wall of the irregular hole (4). An anti-detachment device (2) is provided between the outer surface of one end of the worm gear (5) and one side of the card box (1). The anti-detachment device (2) can be installed by installing several protrusions (21) on the outer surface of the worm gear (5), and then using a locking block (24) and a limiting block (29) to be inserted between the several protrusions (21) to limit and fix the worm gear (5) after rotation.

2. The anti-extraction fastener of claim 1, wherein: The anti-fall-off device (2) includes a plurality of protrusions (21), wherein one side of the protrusions (21) is fixedly installed on the outer surface of one end of the worm (5); A bracket (22), wherein one side of the bracket (22) is fixedly installed on one side of the card box (1); U-shaped block (23), wherein both ends of the U-shaped block (23) are installed through one side of the bracket (22); A locking block (24), wherein one side of the locking block (24) is fixedly installed on one side of both ends of the U-shaped block (23); Two springs (25) are provided, with the inner walls of the two springs (25) respectively fitted onto the outer surfaces of the two ends of the U-shaped block (23), and the two ends are respectively fixedly installed on one side of the bracket (22) and one side of the locking block (24).

3. The anti-extraction fastener of claim 2, wherein: The anti-fall-off device (2) also includes two reinforcing rods (26), wherein the two sides of the reinforcing rods (26) are fixedly installed on one side of the bracket (22) and one side of the card box (1), respectively.

4. The anti-extraction fastener of claim 2, wherein: The anti-fall-off device (2) also includes a rotating rod (27), one end of which is rotatably mounted on one side of the card box (1), while the other end is inserted into the inner wall of the U-shaped block (23).

5. The anti-extraction fastener of claim 2, wherein: The longitudinal section of one end of the card block (24) is trapezoidal, and the trapezoidal end of the card block (24) is located on the end away from the spring (25).

6. The anti-extraction fastener of claim 2, wherein: The anti-dropping device (2) also includes an L-shaped block (28), wherein one side of the L-shaped block (28) is fixedly installed on one side of the card box (1); Limiting block (29), wherein one side of the limiting block (29) is rotatably mounted on one side of the L-shaped block (28), and one side abuts against one end of the L-shaped block (28) and one side of the protrusion (21); A torsion spring (210) is provided, wherein the inner wall of the torsion spring (210) is sleeved on the outer surface of one end of the limiting block (29), and both ends are fixedly installed on one side of the L-shaped block (28) and one side of the limiting block (29), respectively.

7. The anti-extraction fastener of claim 6 wherein: The anti-fall-off device (2) also includes several round rollers (211), which are installed at equal distances on the outer surface of one end of the limiting block (29).

Images