Self-locking screw

Abstract

The self-locking screw comprises a supporting device, the top end of the supporting device is in threaded insertion connection with a positioning device, the outer ring of the positioning device is slidably sleeved with a protection device, and the positioning device comprises a clamping cover, a threaded rod, a first plastic ring, a positioning column, an extending support and a positioning rod. The clamping cover and the extending support are rotatably installed on the positioning rod, the clamping cover is located below the extending support, the positioning column is fixedly installed at the bottom end of the extending support and distributed annularly, the first plastic ring is fixedly installed at the bottom end of the clamping cover, and the threaded rod is fixedly installed in the center of the bottom end of the positioning rod. And the protection device comprises an alignment groove, a protection sleeve, a second plastic ring and alignment holes, and the alignment holes are formed in the top end of the protection sleeve and are annularly distributed. Through the arrangement of the positioning device, the protection device and the supporting device, the purpose of protecting the screw is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of building components, in particular to a self-locking screw. Background Art

[0002] Self-locking screws are self-tapping screws that do not require nuts. The thread is self-tapping and the tail is sharp. This type of screw does not require tapping in the hole and can be directly screwed into a drilled, punched or die-cast hole.

[0003] For example, a self-locking screw with Chinese patent publication number CN204739072U includes a nut and a screw, the outer surface of the screw is provided with an external thread by tapping, the front end of the nut is provided with a fixing device, the nut and the screw are connected by a connecting block, both ends of the screw are welded with elastic blocks, a spring is fixedly installed on the inner side of the elastic block, and the spring is fixed to the surface of the screw, a pointed tail is provided at the end of the screw, the outer surface of the pointed tail is provided with a thread by tapping, the edge of the nut is a square structure, the surrounding surfaces of the nut are a convex structure, and the middle part of the nut is a concave shape.

[0004] The self-locking screws in the above patent can only achieve the purpose of automatic locking when in use, while the existing self-locking screws are exposed to the outside world and are exposed to rain and sunlight when in use, which causes rust on the top of the screws. Therefore, a device is needed to improve the above problem. Utility Model Content

[0005] The purpose of the utility model is to provide a self-locking screw to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a self-locking screw, comprising a supporting device, a positioning device is threadedly inserted into the top end of the supporting device, a protective device is slidably sleeved on the outer ring of the positioning device, the positioning device comprises a card cover, a threaded rod, a first plastic ring, a positioning column, an extension bracket and a positioning rod, the card cover and the extension bracket are rotatably mounted on the positioning rod, and the card cover is located below the extension bracket, the positioning column is fixedly mounted on the bottom end of the extension bracket, and the positioning column is distributed in a ring shape, the first plastic ring is fixedly mounted on the bottom end of the card cover, and the threaded rod is fixedly mounted at the bottom end center of the positioning rod.

[0007] Preferably, the protective device includes an alignment groove, a protective sleeve, a second plastic ring and an alignment hole, the alignment hole is opened on the top of the protective sleeve, and the alignment holes are distributed in a ring shape, the alignment groove is opened at the top center of the protective sleeve, and the second plastic ring is fixedly installed on the bottom outer ring of the protective sleeve.

[0008] Preferably, the supporting device comprises a threaded hole and a self-locking screw, and the threaded hole is opened at the top center of the self-locking screw.

[0009] Preferably, the threaded rod is threadedly inserted into the threaded hole, and the threaded rod is slidably inserted into the inner center of the alignment groove.

[0010] Preferably, a circular hole is provided in the inner center of the alignment groove.

[0011] Preferably, the diameter of the protective sleeve is 2 cm larger than the diameter of the self-locking screw.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0013] When the device is in use, the positioning rod inside the positioning device can drive the first plastic ring to contact the alignment groove when it is screwed, so that the protective cover can be pushed to move and the first plastic ring can be driven to fit the alignment groove, thereby preventing leakage inside the alignment groove. At the same time, the positioning column and the alignment hole are aligned and adapted to each other, so that the protective cover can be limited from multiple points, and when the threaded rod is screwed to the inside of the threaded hole, the second plastic ring can be driven to fit the surface of the external equipment, thereby preventing rainwater from contacting the self-locking screw. At the same time, the protective cover is located on the outer ring of the self-locking screw, so that the self-locking screw can be reduced from the impact of bad weather outside, thereby completing the work of protecting the self-locking screw. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the main structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the positioning device of the utility model;

[0016] Figure 3 This is a schematic diagram of the structure of the protective device of the utility model;

[0017] Figure 4 This is a schematic diagram of the structure of the support device of the utility model.

[0018] In the figure: 1-positioning device, 2-protective device, 3-supporting device, 4-card cover, 5-threaded rod, 6-first plastic ring, 7-positioning column, 8-extension bracket, 9-positioning rod, 10-alignment groove, 11-protective sleeve, 12-second plastic ring, 13-alignment hole, 14-threaded hole, 15-self-locking screw. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1-4 The utility model provides an embodiment: a self-locking screw, including a supporting device 3, a positioning device 1 is threadedly inserted at the top of the supporting device 3, a protective device 2 is slidably sleeved on the outer ring of the positioning device 1, the positioning device 1 includes a card cover 4, a threaded rod 5, a first plastic ring 6, a positioning column 7, an extension bracket 8 and a positioning rod 9, the card cover 4 and the extension bracket 8 are rotatably mounted on the positioning rod 9, and the card cover 4 is located below the extension bracket 8, the positioning column 7 is fixedly mounted on the bottom end of the extension bracket 8, and the positioning column 7 is distributed in an annular shape, the first plastic ring 6 is fixedly mounted on the bottom end of the card cover 4, and the threaded rod 5 is fixedly mounted at the bottom end center of the positioning rod 9.

[0021] The protective device 2 includes an alignment groove 10, a protective sleeve 11, a second plastic ring 12 and an alignment hole 13. The alignment hole 13 is opened on the top of the protective sleeve 11, and the alignment hole 13 is distributed in a ring shape. The alignment groove 10 is opened at the top center of the protective sleeve 11. The second plastic ring 12 is fixedly installed on the bottom outer ring of the protective sleeve 11. A circular groove is opened through the bottom end of the protective sleeve 11, so that the protective sleeve 11 can be slidably connected to the outer ring of the self-locking screw 15.

[0022] The supporting device 3 comprises a threaded hole 14 and a self-locking screw 15 . The threaded hole 14 is arranged at the top center of the self-locking screw 15 , allowing the threaded rod 5 to enter the inside of the threaded hole 14 .

[0023] The threaded rod 5 is threadedly inserted into the threaded hole 14 , and the threaded rod 5 is slidably inserted into the inner center of the alignment groove 10 , so that the positioning rod 9 drives the card cover 4 and the extension bracket 8 to move.

[0024] A circular hole is formed in the center of the alignment groove 10 to allow the threaded rod 5 to pass through the interior of the protective sleeve 11 .

[0025] The diameter of the protective sleeve 11 is 2 cm larger than the diameter of the self-locking screw 15 , so the self-locking screw 15 can be protected.

[0026] Working principle: When in use, first install the self-locking screw 15 on the external equipment, then assemble the protective cover 11 with the positioning rod 9, and open a round hole through the top center of the alignment groove 10 to allow the threaded rod 5 to pass through the protective cover 11. After that, the threaded rod 5 can be moved to fit with the threaded hole 14, and then the positioning rod 9 is screwed and rotated so that the threaded rod 5 can enter the inside of the threaded hole 14. At the same time, the positioning column 7 can be slidably inserted into the inside of the alignment hole 13, so that when the threaded rod 5 moves to the inside of the threaded hole 14, the positioning rod 9 can squeeze the extension bracket 8 and the positioning column 7. The protective sleeve 11 is driven to move at the same time, so that a multi-directional thrust can be provided on the top of the protective sleeve 11. At the same time, when the threaded rod 5 is screwed to the inner part of the threaded hole 14 to the limit position, the card cover 4 can be driven to be fastened with the alignment groove 10, so that the first plastic ring 6 can fit tightly with the top surface of the alignment groove 10, thereby preventing leakage from occurring in the gap between the alignment groove 10 and the card cover 4. At the same time, when the threaded rod 5 is screwed to the limit position, the protective sleeve 11 can also be driven to fit with the external equipment surface, so that the second plastic ring 12 can fit tightly with the equipment surface, thereby improving The sealing degree between the protective cover 11 and the surface of the equipment is improved. At the same time, the protective cover 11 is located on the outer ring surface of the self-locking screw 15, so that the self-locking screw 15 can be protected to prevent rain from outside from directly pouring on the surface of the self-locking screw 15, effectively extending the service life of the self-locking screw 15. When the device is in use, the extension bracket 8 and the card cover 4 are respectively rotatably installed on the outer ring of the positioning rod 9, so that the positioning rod 9 can be prevented from driving the extension bracket 8 and the card cover 4 to rotate at the same time when rotating, and when the threaded rod 5 is screwed to the limit position, the card cover 4 and the protective cover 1 can be respectively driven to rotate. 1 is in contact with the alignment groove 10 and the surface of the device respectively, so that the first plastic ring 6 and the second plastic ring 12 can be driven to fit closely with the alignment groove 10 and the surface of the device, thereby preventing external water from leaking into the inside of the protective cover 11 in all directions and preventing the self-locking screw 15 from rusting on the surface. Subsequently, when the self-locking screw 15 needs to be removed, the positioning rod 9 can be screwed in the reverse direction until the threaded rod 5 is screwed out from the inside of the threaded hole 14, and then the protective cover 11 is pulled outward, so that the self-locking screw 15 can be exposed, which is convenient for the user to take out the self-locking screw 15 alone to complete the work.

[0027] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A self-locking screw, comprising a supporting device (3), wherein the top end of the supporting device (3) is threadedly connected with a positioning device (1), and the outer ring of the positioning device (1) is slidably sleeved with a protective device (2), characterized in that: The positioning device (1) comprises a card cover (4), a threaded rod (5), a first plastic ring (6), a positioning column (7), an extension bracket (8) and a positioning rod (9); the card cover (4) and the extension bracket (8) are rotatably mounted on the positioning rod (9), and the card cover (4) is located below the extension bracket (8); the positioning column (7) is fixedly mounted on the bottom end of the extension bracket (8), and the positioning column (7) is distributed in a ring shape; the first plastic ring (6) is fixedly mounted on the bottom end of the card cover (4); and the threaded rod (5) is fixedly mounted at the bottom center of the positioning rod (9).

2. A self-locking screw according to claim 1, characterized in that: The protective device (2) comprises an alignment groove (10), a protective sleeve (11), a second plastic ring (12) and an alignment hole (13); the alignment hole (13) is provided on the top of the protective sleeve (11), and the alignment holes (13) are distributed in a ring shape; the alignment groove (10) is provided at the center of the top of the protective sleeve (11), and the second plastic ring (12) is fixedly mounted on the outer ring of the bottom end of the protective sleeve (11).

3. A self-locking screw according to claim 2, characterized in that: The supporting device (3) comprises a threaded hole (14) and a self-locking screw (15), wherein the threaded hole (14) is arranged at the top center of the self-locking screw (15).

4. A self-locking screw according to claim 3, characterized in that: The threaded rod (5) is threadedly inserted into the interior of the threaded hole (14), and the threaded rod (5) is slidably inserted into the interior center of the alignment groove (10).

5. A self-locking screw according to claim 4, characterized in that: A circular hole is provided at the inner center of the alignment groove (10).

6. A self-locking screw according to claim 5, characterized in that: The diameter of the protective sleeve (11) is 2 cm larger than the diameter of the self-locking screw (15).

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