Anti-loose fastener

Abstract

The utility model relates to the technical field of fasteners, and discloses an anti-loose fastener which comprises a bolt, a nut is connected to the bolt in a threaded mode, a through hole is formed in the bolt, an external threaded pipe is fixedly connected to the lower end of the nut, an internal threaded pipe matched with the external threaded pipe is connected to the external threaded pipe in a threaded mode, and the internal threaded pipe is fixedly connected to the lower end of the nut in a threaded mode. The lower end of the inner threaded pipe is fixedly connected with a first U-shaped fixing block and a second U-shaped fixing block which are symmetrical to each other, and the first U-shaped fixing block and the second U-shaped fixing block are detachably connected with a fixing mechanism. According to the anti-loosening fastener, the first U-shaped fixing block and the second U-shaped fixing block are aligned to the two ends of the through hole, then the inserting rod is inserted into the first U-shaped fixing block and the second U-shaped fixing block, the arc-shaped metal elastic piece enables the inserting rod not to fall off from the first U-shaped fixing block and the second U-shaped fixing block easily, and the inserting rod is located in the through hole. And therefore, the external threaded pipe and the nut are fixed, and the possibility of looseness of the external threaded pipe and the nut is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of fasteners, in particular to an anti-loosening fastener. Background Art

[0002] Fasteners are widely used mechanical parts, and their main function is to fasten two or more parts (or components) together into a whole. Various fasteners can be seen on various machines, equipment, vehicles, ships, railways, bridges, buildings, structures, tools, instruments, meters and supplies.

[0003] At present, the patent with the announcement number CN210889647U discloses a fastener, which relates to the field of fasteners, including a bolt and a nut, the bolt including a nut and a screw, a pair of support rods are arranged on the end face of the nut away from the screw, a gap is arranged between the pair of support rods, and a pair of mounting holes are arranged on the outer wall of the nut, and the pair of mounting holes are arranged in relative positions. The above technology has the following advantages and effects: by setting a pair of support rods to clamp the steel rod, and by setting the mounting holes for the thin rod to be inserted, the rotation of the nut and the nut can be controlled, so no matter whether the outer wall of the nut or the nut is worn or scraped, the bolt and the nut can be easily tightened or loosened, achieving the effect of convenient loosening and tightening.

[0004] However, the above technology still has the following problems:

[0005] During the use of fasteners, due to the existence of vibrations such as inertial force, jumping force and slow force when the mechanical equipment is running, these vibrations will cause the fasteners at the connection to gradually loosen. The impact that the equipment may encounter during operation will also aggravate the loosening of the fasteners. Utility Model Content

[0006] In view of the deficiencies in the prior art, the utility model provides an anti-loosening fastener, which can prevent the fastener from loosening.

[0007] The utility model provides the following technical solution: an anti-loosening fastener, comprising a bolt, a nut being threadedly connected to the bolt, a through hole being opened on the bolt, an externally threaded tube being fixedly connected to the lower end of the nut, an internally threaded tube being threadedly connected to the externally threaded tube and matching therewith, two mutually symmetrical U-shaped fixing blocks 1 and 2 being fixedly connected to the lower end of the internally threaded tube, and a fixing mechanism being detachably connected to the U-shaped fixing block 1 and the U-shaped fixing block 2.

[0008] Furthermore, rubber pads are fixedly connected to the surfaces of the bolt and the nut.

[0009] Furthermore, the inner diameter of the internally threaded pipe is larger than the nominal diameter of the bolt thread.

[0010] Further, the lengths of the external thread tube and the internal thread tube are the same.

[0011] Further, the fixing mechanism includes a plug rod slidably connected to the first U-shaped fixing block and the second U-shaped fixing block. A limiting plate is fixedly connected to the end of the plug rod. A groove is formed on the surface of the plug rod, and an arc-shaped metal elastic sheet is fixedly connected to the inner wall of the groove.

[0012] Further, a limiting groove is formed on the inner wall of the groove. A connecting plate is fixedly connected to the front end of the arc-shaped metal elastic sheet, and the front end of the connecting plate is located inside the limiting groove.

[0013] Compared with the prior art, the present utility model has the following beneficial effects:

[0014] After the installation of this anti-loosening fastener, the internal thread tube is threadedly connected to the internal thread tube under the nut, and the position of the internal thread tube is adjusted so that the first U-shaped fixing block and the second U-shaped fixing block are aligned with both ends of the through hole. Then the plug rod is inserted into the first U-shaped fixing block and the second U-shaped fixing block. The arc-shaped metal elastic sheet makes it difficult for the plug rod to fall off the first U-shaped fixing block and the second U-shaped fixing block, and the plug rod is located in the through hole, making it impossible for the internal thread tube to rotate further, thereby fixing the external thread tube and the nut and reducing the possibility of loosening. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a three-dimensional structure diagram of the whole of the present utility model;

[0016] Figure 2 is a three-dimensional structure diagram of the through hole of the present utility model;

[0017] Figure 3 is a three-dimensional structure diagram of the internal thread tube, the first U-shaped fixing block and the second U-shaped fixing block of the present utility model;

[0018] Figure 4 is a sectional three-dimensional structure diagram of the fixing mechanism of the present utility model.

[0019] In the figure: 1. Bolt; 2. Nut; 3. Through hole; 4. External thread tube; 5. Internal thread tube; 6. First U-shaped fixing block; 7. Second U-shaped fixing block; 8. Fixing mechanism; 801. Plug rod; 802. Limiting plate; 803. Groove; 804. Arc-shaped metal elastic sheet; 9. Rubber pad; 10. Limiting groove; 11. Connecting plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0021] Please refer to Figures 1 to 4 , a self-locking fastener, including a bolt 1, a nut 2 is threadedly connected to the bolt 1. A through hole 3 is provided on the bolt 1. A threaded outer tube 4 is fixedly connected to the lower end of the nut 2. An internally threaded tube 5 that matches it is threadedly connected to the threaded outer tube 4. Two symmetrically arranged U-shaped fixing blocks one 6 and U-shaped fixing blocks two 7 are fixedly connected to the lower end of the internally threaded tube 5. A fixing mechanism 8 is detachably connected to the U-shaped fixing block one 6 and the U-shaped fixing block two 7.

[0022] The self-locking fastener in the present utility model is similar in structure to the existing fasteners. For example, a patent with the publication number CN210889647U discloses a fastener. The main improvement point of the present utility model is that by inserting the insertion rod 801 into the U-shaped fixing block one 6 and the U-shaped fixing block two 7, the insertion rod 801 is located in the through hole 3 of the bolt 1, thereby fixing the internally threaded tube 5, restricting the rotation of the internally threaded tube 5, and thus restricting the threaded outer tube 4 threadedly connected to the internally threaded tube 5, thereby restricting the rotation of the nut 2, thus achieving a self-locking effect. As Figures 1 to 4 shown, when the self-locking fastener in the present utility model is in use, after first fixing the bolt 1 and the nut 2 on the object to be fixed, threadedly connect the internally threaded tube 5 and the threaded outer tube 4, and adjust the internally threaded tube 5 so that the U-shaped fixing block one 6 and the U-shaped fixing block two 7 below the internally threaded tube 5 are located on both sides of the through hole 3. Then insert the insertion rod 801 on the fixing mechanism 8 into the U-shaped fixing block one 6 and the U-shaped fixing block two 7, so that Chang'an is located in the through hole 3 and is in a vertical state with the through hole 3, so that the insertion rod 801 fixes the internally threaded tube 5 and restricts the rotation of the internally threaded tube 5. The threaded outer tube 4 is threadedly connected to the internally threaded tube 5 and restricts the internally threaded tube 5, indirectly restricting the threaded outer tube 4, thereby achieving a self-locking effect on the nut 2. According to the reverse operation, pulling out the insertion rod 801 outward can release the restriction on the internally threaded tube 5, and thus remove the internally threaded tube 5, the threaded outer tube 4 and the nut 2 in this way.

[0023] As Figure 1 or Figure 2 shown, rubber pads 9 are fixedly connected to the surfaces of the bolt 1 and the nut 2.

[0024] Specifically, when the bolt 1 and the nut 2 are fixedly installed on the object, the rubber pad 9,...

[0025] As Figure 1 shown, the inner diameter of the internally threaded tube 5 is greater than the nominal diameter of the thread of the bolt 1.

[0026] Specifically, to avoid affecting the threaded connection between the nut 2 and the bolt 1.

[0027] As Figure 1 or Figure 2As shown, the lengths of the external-threaded pipe 4 and the internal-threaded pipe 5 are the same.

[0028] Specifically, when the position of the nut 2 is appropriate, after the entire internal-threaded pipe 5 is threadedly connected and overlapped with the external-threaded pipe 4, it just makes the U-shaped fixing block one 6 and the U-shaped fixing block two 7 align with both ends of the through hole 3. Insert the insertion rod 801. The upper surface of the insertion rod 801 contacts the lower end of the external-threaded pipe 4, which can transmit frictional force and make the insertion rod 801 more difficult to fall off.

[0029] As Figure 4 shown, the fixing mechanism 8 includes an insertion rod 801 slidably connected to the U-shaped fixing block one 6 and the U-shaped fixing block two 7. A limiting plate 802 is fixedly connected to the end of the insertion rod 801. A groove 803 is formed on the surface of the insertion rod 801, and an arc-shaped metal elastic piece 804 is fixedly connected to the inner wall of the groove 803.

[0030] Specifically, during the process of inserting the insertion rod 801 into the U-shaped fixing block one 6 and the U-shaped fixing block two 7, the arc-shaped metal elastic piece 804 at the front end of the insertion rod 801 will be squeezed and move downward into the groove 803. After the extrusion is removed, the arc-shaped metal elastic piece 804 will automatically return to its original state. Without giving the insertion rod 801 a pulling force, the insertion rod 801 is not easy to detach from the U-shaped fixing block one 6 and the U-shaped fixing block two 7, so it can always be in the through hole 3 to limit the internal-threaded pipe 5. Pulling out the insertion rod 801 is based on the same principle.

[0031] As Figure 4 shown, a limiting groove 10 is formed on the inner wall of the groove 803. A connecting plate 11 is fixedly connected to the front end of the arc-shaped metal elastic piece 804, and the front end of the connecting plate 11 is located inside the limiting groove 10.

[0032] Specifically, during the up and down movement of the arc-shaped metal elastic piece 804, the connecting plate 11 is always inside the limiting groove 10, preventing the connecting plate 11 from detaching from the limiting groove 10 and preventing the connecting plate 11 and the output end of the arc-shaped metal elastic piece 804 from exiting the groove 803, thus making it inconvenient to pull out the insertion rod 801 from the U-shaped fixing block one 6 and the U-shaped fixing block two 7.

[0033] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A locking fastener, comprising a bolt (1), and a nut (2) is threadedly connected to the bolt (1), characterized in that: A through hole (3) is provided in the bolt (1). A lower end of the nut (2) is fixedly connected to an external thread pipe (4). The external thread pipe (4) is threadedly connected to a matching internal thread pipe (5). A lower end of the internal thread pipe (5) is fixedly connected to two symmetrically arranged U-shaped fixing blocks one (6) and U-shaped fixing blocks two (7). A fixing mechanism (8) is detachably connected to the U-shaped fixing block one (6) and the U-shaped fixing block two (7).

2. The anti-loosening fastener according to claim 1, characterized in that: Rubber pads (9) are fixedly connected to surfaces of the bolt (1) and the nut (2).

3. The anti-loosening fastener according to claim 1 or 2, characterized in that: An inner diameter of the internal thread pipe (5) is larger than a nominal diameter of threads of the bolt (1).

4. The anti-loosening fastener according to claim 3, wherein: The external thread pipe (4) and the internal thread pipe (5) have the same length.

5. A lock - preventing fastener according to claim 1, 2 or 4, characterized in that: The fixing mechanism (8) includes a plug rod (801) slidably connected to the U-shaped fixing block one (6) and the U-shaped fixing block two (7). A limiting plate (802) is fixedly connected to a terminal end of the plug rod (801). A groove (803) is provided on a surface of the plug rod (801). An arc-shaped metal elastic sheet (804) is fixedly connected to an inner wall of the groove (803).

6. The anti-loosening fastener according to claim 5, characterized in that: A limiting groove (10) is provided on the inner wall of the groove (803). A connecting plate (11) is fixedly connected to a front end of the arc-shaped metal elastic sheet (804). A front end of the connecting plate (11) is located inside the limiting groove (10).

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