Anti-loose fastener

Abstract

The utility model discloses an anti-loose fastener in the technical field of fasteners, which comprises a fastener main body, the fastener main body comprises a fastening screw rod and an anti-loose insertion rod, and the outer part of the fastening screw rod is in threaded connection with a fastening nut; a fastening slot is formed in the end part of the fastening screw rod; a fastening cylinder sleeves the outer part of the anti-loosening insertion rod; the anti-loosening inserting rod is inserted into the fastening inserting groove, three limiting rods are assembled on the outer wall of the fastening cylinder, the three limiting rods are distributed outside the fastening cylinder in a triangular shape, anti-retreating teeth are arranged on the inner walls of the three limiting rods, and the anti-retreating teeth are matched with external threads of the fastening screw rod; according to the anti-loosening fastener, the anti-loosening inserting rod is embedded into the end of the fastening screw, under the action of the anti-loosening barrel, circumferential limiting of the fastening nut is achieved, the phenomenon of tooth retreating caused by rotation of the nut structure is prevented, and under the meshing of the limiting rod and the fastening screw, the anti-loosening inserting rod and the fastening screw are kept in a stable connection limiting state; and a good tooth withdrawing prevention function is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of fasteners, and specifically relates to a loosening-proof fastener. Background Art

[0002] Fasteners are a general term for a class of mechanical parts used to firmly connect two or more parts (or components) into a whole. They are characterized by a wide variety of varieties and specifications and different performance uses. Fasteners are the most widely used mechanical basic parts and have a large demand;

[0003] The cooperation of bolts and nuts is one of the commonly used fasteners. However, when used in some vibrating occasions, the fasteners are prone to looseness, posing potential safety hazards. Therefore, it is necessary to improve the existing technology. Content of the Utility Model

[0004] The purpose of the utility model is to provide a loosening-proof fastener to solve the problem that the existing cooperation of bolts and nuts is one of the commonly used fasteners, but when used in some vibrating occasions, the fasteners are prone to looseness, posing potential safety hazards as mentioned in the above background art.

[0005] To achieve the above purpose, the utility model provides the following technical solution: a loosening-proof fastener, including a fastener main body, the fastener main body includes a fastening screw rod and a loosening-proof insertion rod, and a fastening nut is screwed on the outer part of the fastening screw rod;

[0006] A fastening slot is opened at the end of the fastening screw rod, and a fastening cylinder is sleeved on the outer part of the loosening-proof insertion rod;

[0007] The loosening-proof insertion rod is inserted into the fastening slot, three limiting rods are assembled on the outer wall of the fastening cylinder, the three limiting rods are distributed in a triangular shape outside the fastening cylinder, and anti-retreat teeth are opened on the inner walls of the three limiting rods, and the anti-retreat teeth are matched with the external threads of the fastening screw rod.

[0008] Preferably, as a loosening-proof fastener of the utility model, an annular groove is opened at the bottom end of the fastening nut, and the top ends of the three limiting rods are inserted into the annular groove.

[0009] Preferably, as a loosening-proof fastener of the utility model, the three limiting rods are all made of elastic materials.

[0010] Preferably, as a loosening-proof fastener of the utility model, external threads are opened on the outer wall of the loosening-proof insertion rod, internal threads are opened on the inner wall of the fastening cylinder, the external threads and the internal threads are matched, a fixed disk is installed at the bottom end of the loosening-proof insertion rod, and the fixed disk and the fastening cylinder are connected through a clamping structure.

[0011] Preferably, as an anti-loosening fastener of the present utility model, the clamping structure includes clamping blocks installed on both sides of the inner wall of the fixed disk and clamping grooves opened on both sides of the outer wall of the fastening cylinder. The clamping blocks are clamped in the clamping grooves. An elastic cavity is opened inside the clamping blocks, and an elastic member is installed inside the elastic cavity.

[0012] Preferably, as an anti-loosening fastener of the present utility model, inclined convex surfaces are opened on both outer walls of the clamping blocks, inclined concave surfaces are opened on both inner walls of the clamping grooves, and the inclined convex surfaces and the inclined concave surfaces cooperate with each other.

[0013] Preferably, as an anti-loosening fastener of the present utility model, a fixed ring is fixedly installed at the upper end of the outer part of the fastening screw rod. An annular pressing sheet, a spring and an annular rubber sheet are sleeved on the circumferential surface of the fastening screw rod, and an extrusion block is fixedly installed at the lower end edge of the annular pressing sheet.

[0014] Compared with the prior art, the beneficial effect of the present utility model is that the anti-loosening fastener has a reasonable structural design;

[0015] After the fastening nut and the fastening screw rod are tightened, by embedding an anti-loosening insertion rod at the end of the fastening screw rod, under the action of the anti-detachment cylinder, circumferential limitation of the fastening nut is realized, preventing the nut structure from rotating to generate tooth-backing phenomenon. Under the meshing of the limiting rod and the fastening screw rod, the anti-loosening insertion rod and the fastening screw rod are kept in a stable connection and limiting state, having a good anti-tooth-backing function. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the present utility model;

[0017] Figure 2 is a schematic diagram of the fastening cylinder of the present utility model;

[0018] Figure 3 is a schematic diagram of the anti-loosening insertion rod of the present utility model;

[0019] Figure 4 is a schematic diagram of the clamping structure of the present utility model;

[0020] Figure 5 is a schematic diagram of the annular rubber sheet of the present utility model.

[0021] In the figure: 1. Fastener main body; 2. Clamping block; 3. Clamping groove; 4. Elastic cavity; 5. Elastic cavity; 6. Filling member; 7. Fastening nut; 8. Fastening slot; 9. Fastening cylinder; 10. Anti-loosening insertion rod; 11. Annular groove; 12. Fixed ring; 13. Extrusion block; 14. Annular pressing sheet; 15. Annular rubber sheet; 16. Spring; 17. Limiting rod; 18. Anti-backing teeth; 19. Internal thread; 20. External thread; 21. Fixed disk; 22. Elastic member; 23. Inclined convex surface; 24. Inclined concave surface; 25. Filling member. Detailed implementation manners

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0023] Please refer to Figures 1-5 , the present invention provides a technical solution:

[0024] In this technical solution, a loosening-preventing fastener includes a fastener body 1, and is characterized in that: the fastener body 1 includes a fastening screw rod 6 and a loosening-preventing insertion rod 10, and a fastening nut 7 is screwed on the outside of the fastening screw rod 6; a fastening slot 8 is opened at the end of the fastening screw rod 6, and a fastening cylinder 9 is sleeved on the outside of the loosening-preventing insertion rod 10; the loosening-preventing insertion rod 10 is inserted into the fastening slot 8, and three limiting rods 17 are assembled on the outer wall of the fastening cylinder 9, and the three limiting rods 17 are distributed in a triangular shape outside the fastening cylinder 9, and anti-retreat teeth 18 are opened on the inner walls of the three limiting rods 17, and the anti-retreat teeth 18 are matched with the external threads of the fastening screw rod 6, and an annular groove 11 is opened at the bottom end of the fastening nut 7, and the top ends of the three limiting rods 17 are inserted into the annular groove 11.

[0025] In this technical solution, the fastener body 1 is composed of a traditional screw rod and a nut. The fastening nut 7 is screwed on the outside of the fastening screw rod 6. The loosening-preventing insertion rod 10 can be detachably inserted into the fastening slot 8 at the bottom of the fastening screw rod 6. At the same time, the fastening cylinder 9 outside the loosening-preventing insertion rod 10 is sleeved on the outside of the fastening screw rod 6. The limiting rod 17 is stuck on the outside of the fastening screw rod 6 through the anti-retreat teeth 18. At the same time, the top end of the limiting rod 17 is inserted into the annular groove 11 at the bottom end of the fastening nut 7, so as to realize the loosening-preventing function of the fastening nut 7.

[0026] In some technical solutions, the three limiting rods 17 are all made of elastic materials.

[0027] In this technical solution, the three limiting rods 17 are all made of hard rubber materials.

[0028] In some technical solutions, an external thread 20 is opened on the outer wall of the loosening-preventing insertion rod 10, an internal thread 19 is opened on the inner wall of the fastening cylinder 9, the external thread 20 and the internal thread 19 are matched, and a fixing plate 21 is installed at the bottom end of the loosening-preventing insertion rod 10, and the fixing plate 21 and the fastening cylinder 9 are connected through a clamping structure.

[0029] In this technical solution, the fastening cylinder 9 is installed on the outside of the loosening-preventing insertion rod 10 through thread matching, and the loosening-preventing screw rod 10 and the fastening cylinder 9 are secondarily connected through the fixing plate 21.

[0030] In some technical solutions, the clamping structure includes clamping blocks 2 installed on both sides of the inner wall of the fixed disk 21 and clamping grooves 3 opened on both sides of the outer wall of the fastening cylinder 9. The clamping blocks 2 are clamped in the clamping grooves 3, and an elastic cavity 4 is opened inside the clamping blocks 2, and an elastic member 22 is installed inside the elastic cavity 4.

[0031] In this technical solution, the fixed disk 21 and the fastening cylinder 9 can be connected by inserting the clamping blocks 2 into the clamping grooves 3.

[0032] In some technical solutions, a fixing ring 12 is fixedly installed at the upper end of the outer part of the fastening screw rod 6. An annular pressing piece 14, a spring 16 and an annular rubber piece 15 are sleeved on the circumferential surface of the fastening screw rod 6, and an extrusion block 13 is fixedly installed at the lower edge of the annular pressing piece 14.

[0033] In this technical solution, the annular pressing piece 14 is located above the fixing ring 12, the spring 16 is located above the annular pressing piece 14, the annular rubber piece 15 is located below the fixing ring 12, and an extrusion block 13 is fixedly installed at the lower edge of the annular pressing piece 14.

[0034] In some technical solutions, an elastic cavity 5 is opened inside the annular rubber piece 15, and a filling piece 25 is installed inside the elastic cavity 5.

[0035] In this technical solution, the annular rubber piece 15 can be supported by the filling piece 25.

[0036] Working principle:

[0037] First, insert the fastening screw rod 6 into the installation hole to be installed, then screw the fastening nut 7 onto the fastening screw rod 6, then install the anti - detachment cylinder 9 onto the anti - loosening insertion rod 10, and insert the anti - loosening insertion rod 10 into the anti - detachment slot 8. During the insertion, the anti - retreat teeth 18 on the limit rod 17 will engage with the external thread of the fastening screw rod 6 until the end of the limit rod 17 is placed in the annular groove 11 on the fastening nut 7 to limit the fastening nut 7.

[0038] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "including", "comprising" or any other variant thereof is intended to cover non - exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to this process, method, article or device.

[0039] Although the present utility model has been described above with reference to embodiments, various improvements can be made thereto and components thereof can be replaced with equivalents without departing from the scope of the present utility model. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed by the present utility model can be combined with each other in any way, and the exhaustive description of these combinations is not given in this specification only for the consideration of saving space and resources. Therefore, the present utility model is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A locking fastener, comprising a fastener body (1), characterized in that: The fastener body (1) includes a fastening screw rod (6) and a locking pin (10). A fastening nut (7) is screwed onto the outer part of the fastening screw rod (6). A fastening slot (8) is formed at the end of the fastening screw rod (6). A fastening cylinder (9) is sleeved on the outer part of the locking pin (10). The locking pin (10) is inserted into the fastening slot (8). Three limiting rods (17) are assembled on the outer wall of the fastening cylinder (9). The three limiting rods (17) are distributed in a triangular shape outside the fastening cylinder (9). Anti-retreat teeth (18) are formed on the inner walls of the three limiting rods (17), and the anti-retreat teeth (18) are matched with the external threads of the fastening screw rod (6).

2. The anti-loosening fastener according to claim 1, characterized in that An annular groove (11) is formed at the bottom end of the fastening nut (7). The top ends of the three limiting rods (17) are inserted into the annular groove (11).

3. The anti-loosening fastener according to claim 2, characterized in that, The three limiting rods (17) are all made of elastic materials.

4. The anti-loosening fastener according to claim 1, wherein External threads (20) are formed on the outer wall of the locking pin (10). Internal threads (19) are formed on the inner wall of the fastening cylinder (9). The external threads (20) are matched with the internal threads (19). A fixing disc (21) is installed at the bottom end of the locking pin (10). The fixing disc (21) and the fastening cylinder (9) are connected through a clamping structure.

5. The anti-loosening fastener according to claim 4, characterized in that, The clamping structure includes clamping blocks (2) installed on both sides of the inner wall of the fixing disc (21) and clamping grooves (3) formed on both sides of the outer wall of the fastening cylinder (9). The clamping blocks (2) are clamped in the clamping grooves (3). An elastic cavity (4) is formed inside the clamping blocks (2), and an elastic member (22) is installed inside the elastic cavity (4).

6. The anti-loosening fastener according to claim 5, wherein, Oblique convex surfaces (23) are formed on both outer walls of the clamping blocks (2). Oblique concave surfaces (24) are formed on both inner walls of the clamping grooves (3). The oblique convex surfaces (23) are matched with the oblique concave surfaces (24).

7. The anti-loosening fastener according to claim 1, characterized in that, A fixing ring (12) is fixedly installed at the upper end of the outer part of the fastening screw rod (6). An annular pressing piece (14), a spring (16), and an annular rubber sheet (15) are sleeved on the circumferential surface of the fastening screw rod (6). An extrusion block (13) is fixedly installed at the lower edge of the annular pressing piece (14).

8. The anti-loosening fastener according to claim 7, characterized in that, An elastic cavity (5) is formed inside the annular rubber sheet (15), and a filling member (25) is installed inside the elastic cavity (5).

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