Anti-loosening screw fastener

Abstract

The utility model belongs to the technical field of locking bolts, and particularly relates to an anti-loosening screw fastener which comprises a bolt, a screw cap, a screw and a nut, the bolt is composed of the screw cap and the screw, the screw is in threaded connection with the nut, an inner cavity of the screw is provided with an installation groove, an inner cavity of the installation groove is provided with a supporting spring, and the supporting spring is arranged in the installation groove. A positioning pin is movably arranged at the top of the supporting spring, guide grooves are formed in the surfaces of the two sides of the mounting groove, the two ends of the positioning pin are inserted into the guide grooves, positioning grooves are formed in the surface of the nut, and the positioning grooves are annularly distributed at equal intervals; upward thrust is applied to the positioning pin through the supporting spring, so that the positioning pin is connected with the positioning groove in an inserted mode, the nut can be positioned, meanwhile, the countersunk head locking wire is in threaded connection with the multiple sets of countersunk head locking holes, the countersunk head locking wire abuts against the surface of a workpiece, the screw cap and the nut can be locked, and the screw cap and the nut can be locked. And the bolt and the nut are prevented from loosening in the use process.

Description

Technical Field

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

[0002] Bolts and nuts are common fasteners that play a vital role in mechanical assembly and are widely used in a variety of fields, including machinery, electronics, chemicals, and transportation equipment. Traditional bolts consist of a headed screw and a nut, with the internal threads of the nut matching the external threads of the screw. Because the components connected by bolts are removable, and the nut can be screwed on and off the screw, even if the nut is tightened, it can easily loosen under external forces.

[0003] During use of existing nuts, the nuts and bolt caps are locked by friction. The vibration on the locking workpiece will cause the nut to rotate under the action of vibration, which will cause the fastener to loosen easily, affecting the fastening stability of the workpiece. In order to solve the above problems, an anti-loosening screw fastener is proposed in this application. Utility Model Content

[0004] (1) Purpose of the utility model

[0005] In order to solve the technical problems existing in the background technology, the utility model proposes an anti-loosening screw fastener, which applies an upward thrust to the locating pin through a support spring, so that the locating pin is plugged into the locating groove, which can position the nut. At the same time, the countersunk locking wire is connected to several groups of countersunk locking hole threads. The countersunk locking wire will abut against the surface of the workpiece, which can lock the nut cap and the nut to prevent the bolt and nut from loosening during use, thereby solving the problems raised in the background technology.

[0006] (2) Technical solution

[0007] In order to solve the above technical problems, the utility model provides an anti-loosening screw fastener, including a bolt, a screw cap, a screw and a nut, wherein the bolt is composed of a screw cap and a screw, the screw is threadedly connected with a nut, a mounting groove is provided in the inner cavity of the screw, a support spring is provided in the inner cavity of the mounting groove, a positioning pin is movably provided on the top of the support spring, guide grooves are provided on both sides of the mounting groove, and both ends of the positioning pin are inserted into the guide grooves;

[0008] The surface of the nut is provided with positioning grooves, which are distributed in an equidistant ring pattern. The positioning pins are lifted and plugged into the positioning grooves.

[0009] The surfaces of the screw cap and the nut are both penetrated by countersunk locking holes, which are evenly spaced. The countersunk locking holes and the positioning grooves of the nut are staggered, and the countersunk locking holes are threadedly connected with countersunk locking wires.

[0010] Preferably, a bottom positioning rod is provided at the bottom of the inner cavity of the installation slot, and the bottom positioning rod is plugged into the bottom of the support spring.

[0011] Preferably, a top positioning rod is integrally formed in the middle of the lower surface of the positioning pin, a limiting disk is welded on the top of the support spring, and the top positioning rod is plugged into the limiting disk.

[0012] Preferably, compression brackets are welded on both sides of the limiting plate, and the compression brackets are inserted into the guide grooves.

[0013] Preferably, the end surfaces of the compression brackets are each provided with a plug-in groove.

[0014] Preferably, a top embedding groove is provided on the upper surface of the nut, and a top nylon ring is embedded in the inner cavity of the top embedding groove.

[0015] Preferably, a bottom embedding groove is provided on the lower surface of the nut, and a bottom nylon ring is embedded in the inner cavity of the bottom embedding groove.

[0016] The above technical solution of the utility model has the following beneficial technical effects:

[0017] 1. The utility model applies an upward thrust to the positioning pin through the support spring, so that the positioning pin is plugged into the positioning groove, which can position the nut. At the same time, the countersunk locking wire is connected to a plurality of groups of countersunk locking holes through threads. The countersunk locking wire will abut against the surface of the workpiece, which can lock the nut cap and the nut to prevent the bolt and nut from loosening during use.

[0018] 2. In the present invention, after the nut is tightened, the top nylon ring and the bottom nylon ring have good elasticity and abut against the threads on the surface of the screw to generate a locking force, which can further enhance the anti-loosening effect of the nut. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of an anti-loosening screw fastener of the utility model;

[0020] Figure 2 This is a schematic diagram of the cross-sectional structure of an anti-loosening screw fastener of the utility model;

[0021] Figure 3 This is a schematic diagram of the lifting structure of a positioning pin of an anti-loosening screw fastener of the utility model;

[0022] Figure 4 This is a schematic diagram of a support spring connection structure of an anti-loosening screw fastener of the utility model;

[0023] Figure 5This is a schematic diagram of the structure of a nut from a top view of an anti-loosening screw fastener of the utility model;

[0024] Figure 6 This is a schematic structural diagram of a nut from a bottom perspective of an anti-loosening screw fastener of the utility model.

[0025] Reference numerals:

[0026] 1. Bolt; 2. Screw cap; 3. Screw; 4. Nut; 5. Mounting slot; 6. Support spring; 7. Bottom positioning rod; 8. Limit plate; 9. Locating pin; 10. Top positioning rod; 11. Compression bracket; 12. Insertion slot; 13. Guide slot; 14. Top embedded slot; 15. Top nylon ring; 16. Bottom embedded slot; 17. Bottom nylon ring; 18. Locating slot; 19. Countersunk locking hole; 20. Countersunk locking wire. DETAILED DESCRIPTION

[0027] To make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are merely illustrative and are not intended to limit the scope of the present invention. Furthermore, descriptions of known structures and technologies are omitted in the following description to avoid unnecessary confusion regarding the concepts of the present invention.

[0028] like Figure 1-6 As shown, the utility model proposes an anti-loosening screw fastener, including a bolt 1, a screw cap 2, a screw rod 3 and a nut 4. The bolt 1 is composed of a screw cap 2 and a screw rod 3. The screw rod 3 is threadedly connected with a nut 4. The inner cavity of the screw 3 is provided with a mounting groove 5. The inner cavity of the mounting groove 5 is provided with a support spring 6. A positioning pin 9 is movably provided on the top of the support spring 6. Guide grooves 13 are provided on both sides of the mounting groove 5. Both ends of the positioning pin 9 are inserted into the guide grooves 13.

[0029] The surface of the nut 4 is provided with positioning grooves 18, which are distributed in an equidistant ring. The positioning pins 9 are lifted and plugged into the positioning grooves 18.

[0030] The surfaces of the screw cap 2 and the nut 4 are both penetrated by countersunk locking holes 19, which are equidistantly distributed. The countersunk locking holes 19 of the nut 4 are staggered with the positioning grooves 18, and the internal threads of the countersunk locking holes 19 are connected to countersunk locking wires 20.

[0031] It should be noted that the nut 4 is threadedly connected to the screw rod 3 on the bolt 1. The workpiece can be tightened by matching the bolt 1 and the nut 4. Insert a flat-head screwdriver into the insertion slot 12, and apply downward pressure to the compression bracket 11 through the screwdriver to compress the support spring 6. The positioning pin 9 can be inserted into the guide slot 13. After the support spring 6 is reset, the top positioning rod 10 is inserted into the limit plate 8. The support spring 6 can lift the positioning pin 9 and adjust the angle of the nut 4 so that the positioning pin 9 is plugged into the positioning slot 18. At the same time, the countersunk locking wire 20 is threadedly connected to several groups of countersunk locking holes 19. The countersunk locking wire 20 will abut against the surface of the workpiece, which can lock the screw cap 2 and the nut 4 to prevent the bolt 1 and the nut 4 from loosening during use.

[0032] In this embodiment, if Figure 2 and Figure 4 As shown, a bottom positioning rod 7 is provided at the bottom of the inner cavity of the mounting groove 5, and the bottom positioning rod 7 is plugged into the bottom of the support spring 6. A top positioning rod 10 is integrally formed in the middle of the lower surface of the positioning pin 9, and a limiting plate 8 is welded on the top of the support spring 6, and the top positioning rod 10 is plugged into the limiting plate 8.

[0033] It should be noted that the bottom of the support spring 6 is plugged into the bottom positioning rod 7, and the top of the support spring 6 is plugged into the top positioning rod 10, which can improve the stability of the support spring 6 and the positioning pin 9 during use.

[0034] In this embodiment, if Figure 2 and Figure 4 As shown, compression brackets 11 are welded on both sides of the limit plate 8 , and the compression brackets 11 are inserted into the guide grooves 13 . Insertion grooves 12 are provided on the end surfaces of the compression brackets 11 .

[0035] It should be noted that, by inserting a flat-blade screwdriver into the insertion slot 12 and applying downward pressure to the compression bracket 11 through the screwdriver, the support spring 6 can be easily compressed.

[0036] In this embodiment, if Figure 5 and Figure 6 As shown, the upper surface of the nut 4 is provided with a top embedding groove 14, and the inner cavity of the top embedding groove 14 is embedded with a top nylon ring 15. The lower surface of the nut 4 is provided with a bottom embedding groove 16, and the inner cavity of the bottom embedding groove 16 is embedded with a bottom nylon ring 17.

[0037] It should be noted that after the nut 4 is tightened, the top nylon ring 15 and the bottom nylon ring 17 have good elasticity, and abut against the threads on the surface of the screw 3 to generate a locking force, which can further enhance the anti-loosening effect of the nut 4.

[0038] The working principle and use process of the utility model are as follows: the nut 4 is connected with the screw rod 3 on the bolt 1 by thread, and the workpiece can be tightened by matching the bolt 1 and the nut 4. A flat screwdriver is inserted into the insertion slot 12, and downward pressure is applied to the compression bracket 11 by the screwdriver to compress the support spring 6. The positioning pin 9 can be inserted into the guide slot 13. After the support spring 6 is reset, the top positioning rod 10 is inserted into the limit plate 8. The support spring 6 can lift the positioning pin 9, adjust the angle of the nut 4, so that the positioning pin 9 is plugged into the positioning slot 18, and the countersunk locking screw is tightened at the same time. 20 is threadedly connected to several groups of countersunk locking holes 19. The countersunk locking wire 20 will abut against the surface of the workpiece, which can lock the screw cap 2 and the nut 4 to prevent the bolt 1 and the nut 4 from loosening during use. The upper surface and lower surface of the nut 4 are respectively fixed to the top nylon ring 15 and the bottom nylon ring 17 through the top embedded groove 14 and the bottom embedded groove 16. After the nut 4 is tightened, the top nylon ring 15 and the bottom nylon ring 17 have good elasticity and abut against the threads on the surface of the screw 3 to generate locking force, which can further enhance the anti-loosening effect of the nut 4.

[0039] It should be understood that the above-described specific embodiments of the present invention are merely illustrative of or explanation of the principles of the present invention and do not constitute limitations of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention shall be included within the scope of protection of the present invention. In addition, the appended claims of the present invention are intended to cover all variations and modifications that fall within the scope and metes and bounds of the appended claims or their equivalents.

Claims

1. An anti-loosening screw fastener, comprising a bolt (1), a screw cap (2), a screw rod (3) and a nut (4), wherein the bolt (1) is composed of the screw cap (2) and the screw rod (3), and the screw rod (3) is threadedly connected with a nut (4), characterized in that: The screw rod (3) has an inner cavity provided with a mounting groove (5), a support spring (6) is provided in the inner cavity of the mounting groove (5), a positioning pin (9) is movably provided on the top of the support spring (6), and guide grooves (13) are provided on both sides of the mounting groove (5), and both ends of the positioning pin (9) are inserted into the guide grooves (13); The surface of the nut (4) is provided with positioning grooves (18), and the positioning grooves (18) are distributed in an equidistant ring pattern. The positioning pins (9) are inserted into the positioning grooves (18) after being lifted. The surfaces of the screw cap (2) and the nut (4) are both penetrated with countersunk locking holes (19), and the countersunk locking holes (19) are distributed in an equidistant manner. The countersunk locking holes (19) of the nut (4) and the positioning grooves (18) are distributed in an interlaced manner. The internal threads of the countersunk locking holes (19) are connected with countersunk locking wires (20).

2. The anti-loosening screw fastener according to claim 1, characterized in that: A bottom positioning rod (7) is provided at the bottom of the inner cavity of the installation slot (5), and the bottom positioning rod (7) is plugged into the bottom of the support spring (6).

3. The anti-loosening screw fastener according to claim 2, characterized in that: A top positioning rod (10) is integrally formed in the middle of the lower surface of the positioning pin (9), a limiting plate (8) is welded to the top of the support spring (6), and the top positioning rod (10) is plugged into the limiting plate (8).

4. The anti-loosening screw fastener according to claim 3, characterized in that: Compression brackets (11) are welded on both sides of the limiting plate (8), and the compression brackets (11) are inserted into the guide grooves (13).

5. The anti-loosening screw fastener according to claim 4, characterized in that: The end surfaces of the compression brackets (11) are each provided with an inserting groove (12).

6. The anti-loosening screw fastener according to claim 5, characterized in that: A top embedding groove (14) is provided on the upper surface of the nut (4), and a top nylon ring (15) is provided in the inner cavity of the top embedding groove (14).

7. The anti-loosening screw fastener according to claim 6, characterized in that: A bottom embedding groove (16) is provided on the lower surface of the nut (4), and a bottom nylon ring (17) is embedded in the inner cavity of the bottom embedding groove (16).

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