Hardware screw with anti-falling effect

Abstract

The utility model relates to the technical field of hardware screws, and discloses a hardware screw with an anti-loosening effect, which comprises a screw rod, a limiting head arranged on the outer side of the screw rod, a screw cap arranged on the outer side of the screw rod and used for limiting, and a limiting assembly arranged in the screw cap and used for preventing the screw rod from loosening, a reset spring is arranged on the outer side of the limiting assembly. The ratchet teeth on the lower portion of the screw are in contact with the pawls in the nut, the ratchet teeth drive the pawls to rotate when the nut is tightened, the nut can be tightened to the outer side of the screw, and when the nut continues to move upwards to drive the lower connecting sleeve to make contact with the upper connecting sleeve and the oblique teeth on the lower connecting sleeve are tightened and rotate, the upper connecting sleeve and the tension spring are pushed to move upwards. And after the nut is screwed in place, the tension spring downwards presses the upper connecting sleeve to enable the two groups of helical teeth to be meshed together, and the lower connecting sleeve is limited, so that the nut is limited, and the nut and the screw rod are effectively prevented from being loosened.

Description

Technical Field

[0001] The utility model relates to the technical field of hardware screws, in particular to a hardware screw with an anti-slip effect. Background Art

[0002] Hardware screws, also known as metal screws or fasteners, are a common mechanical connector used to connect two or more objects together through fastening force. It is usually made of metal, such as stainless steel, steel, copper, etc., with good corrosion resistance and strength.

[0003] Mechanical equipment is often accompanied by a certain amount of vibration during operation. If the bolts are fixed in a vibrating environment, they are prone to loosening and becoming unstable, and then falling. At present, adhesives are applied to the outside of the bolts to prevent them from loosening. However, since the main component of the adhesive is resin, there is a problem of reduced fixing strength due to the softening of the resin at high temperatures. In addition, it takes a certain amount of time from tightening to hardening of the adhesive, which results in longer operation time. Utility Model Content

[0004] The utility model aims to provide a hardware screw with an anti-slip effect to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a hardware screw with an anti-slip effect, comprising a screw rod, a limited position head is arranged on the outer side of the screw rod, and further comprising:

[0006] A nut is arranged on the outside of the screw for limiting the position, a limiting component is arranged inside the nut to prevent the screw from loosening, and a return spring is arranged on the outside of the limiting component;

[0007] A connecting component is arranged on the outside of the screw rod, and an anti-loosening component is arranged on the outside of the connecting component to prevent the nut from loosening.

[0008] Preferably, the limiting assembly comprises a fixing rod arranged inside the nut, a pawl is arranged on the outer side of the fixing rod, and ratchet teeth are arranged on the outer side of the screw rod.

[0009] Preferably, one end of the return spring is welded to the inner wall of the nut, and the other end is welded to the pawl.

[0010] Preferably, the connecting assembly comprises a fixing sleeve arranged on the outside of the screw rod, and a tension spring is arranged on the outside of the fixing sleeve.

[0011] Preferably, the anti-loosening assembly includes an upper connecting sleeve arranged on the outside of the tension spring, a lower connecting sleeve is arranged on the outside of the upper connecting sleeve, and the outer sides of the upper connecting sleeve and the lower connecting sleeve are both provided with helical teeth.

[0012] Preferably, a through groove is provided inside the lower connecting sleeve, and a threaded wire is provided inside the through groove.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0014] The utility model utilizes the contact between the ratchet teeth at the lower part of the screw and the ratchet pawl inside the nut. When the nut is tightened, the ratchet teeth drive the ratchet pawl to rotate, so that the nut can be tightened to the outside of the screw. When the nut continues to move upward, the lower connecting sleeve is driven to contact the upper connecting sleeve. When the helical teeth on the lower connecting sleeve are tightened and rotated, the upper connecting sleeve and the tension spring are pushed upward, so that the nut can be tightened. When the nut is screwed into place, the tension spring presses the upper connecting sleeve downward to make the two groups of helical teeth mesh together, limit the lower connecting sleeve, thereby limiting the nut and effectively preventing the nut and the screw from loosening. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the structure of a hardware screw with an anti-slip effect provided by the utility model;

[0016] Figure 2 A schematic diagram of the internal structure of the nut provided by the utility model;

[0017] Figure 3 Another perspective view of the screw provided by the utility model;

[0018] Figure 4 This is a schematic diagram of the lower connecting sleeve structure provided by the utility model.

[0019] In the figure: 1. screw rod; 2. nut; 3. limit assembly; 301. fixing rod; 302. pawl; 303. ratchet teeth; 4. reset spring; 5. limit head; 6. connecting assembly; 601. fixing sleeve; 602. tension spring; 7. anti-loosening assembly; 701. upper connecting sleeve; 702. lower connecting sleeve; 703. oblique teeth; 8. through groove. DETAILED DESCRIPTION

[0020] 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.

[0021] See also Figure 1-4As shown, a hardware screw with an anti-slip effect includes a screw 1, a limiting head 5 is arranged on the outer side of the screw 1, the limiting head 5 is welded to the top of the screw 1, and the top of the screw 1 is limited. It also includes: a nut 2 is arranged on the outer side of the screw 1 for limiting, the nut 2 is threadedly connected to the outer side of the screw 1, and a limiting component 3 is arranged inside the nut 2 to prevent the screw 1 from loosening. The nut 2 is limited to the outer side of the screw 1 by setting the limiting component 3, the firmness of the nut 2 is improved, and the nut 2 is prevented from slipping off, and a reset spring 4 is arranged on the outer side of the limiting component 3; the limiting component 3 is reset by setting the reset spring 4, and a connecting component 6 is arranged on the outer side of the screw 1, and an anti-loosening component 7 is arranged on the outer side of the connecting component 6 to prevent the nut 2 from loosening, the anti-loosening component 7 is installed on the screw 1 through the connecting component 6, and the nut 2 is limited on the screw 1 by setting the anti-loosening component 7 to prevent the nut 2 from slipping off the screw 1.

[0022] The limiting assembly 3 includes a fixing rod 301 arranged inside the nut 2, the fixing rod 301 is welded inside the groove of the nut 2, a pawl 302 is arranged on the outer side of the fixing rod 301, the pawl 302 rotates inside the nut 2 through the fixing rod 301, a ratchet tooth 303 is arranged on the outer side of the screw 1, and the ratchet tooth 303 is welded to the lower part of the screw 1; one end of the reset spring 4 is welded to the inner wall of the nut 2, and the other end is welded to the pawl 302, the reset spring 4 limits the pawl 302 to prevent the pawl 302 from flipping over and losing the limit on the ratchet tooth 303.

[0023] The connecting component 6 includes a fixed sleeve 601 arranged on the outside of the screw rod 1, the fixed sleeve 601 is welded to the outside of the screw rod 1, a tension spring 602 is arranged on the outside of the fixed sleeve 601, one end of the tension spring 602 is welded to the fixed sleeve 601, and the other end is welded to the top of the upper connecting sleeve 701; the anti-loosening component 7 includes an upper connecting sleeve 701 arranged on the outside of the tension spring 602, the upper connecting sleeve 701 slides on the outside of the screw rod 1, a lower connecting sleeve 702 is arranged on the outside of the upper connecting sleeve 701, the lower connecting sleeve 702 is welded to the top of the nut 2, the outer sides of the upper connecting sleeve 701 and the lower connecting sleeve 702 are both provided with helical teeth 703, and the two groups of helical teeth 703 can be meshed; the interior of the lower connecting sleeve 702 is provided with a through groove 8, the interior of the through groove 8 is provided with a threaded wire, the threaded wire is of the same specification as the inside of the nut 2, and the lower connecting sleeve 702 moves synchronously with the nut 2.

[0024] Working principle: When using the screw, pass the screw rod 1 through the mounting piece, and then screw the nut 2 to the outside of the screw rod 1. As the nut 2 is tightened to a certain position, the ratchet teeth 303 at the bottom of the screw rod 1 contact the pawl 302 inside the nut 2. When the nut 2 is tightened, the ratchet teeth 303 drive the pawl 302 to rotate, so that the nut 2 can be tightened to the outside of the screw rod 1. When the nut 2 continues to move upward, it drives the lower connecting sleeve 702 to contact the upper connecting sleeve 701. When the helical teeth 703 on the lower connecting sleeve 702 are tightened and rotated, they push the upper connecting sleeve 701 and the tension spring 602 to move upward, so that the nut 2 can be tightened. When the nut 2 is screwed into place, the tension spring 602 presses the upper connecting sleeve 701 downward to make the two sets of helical teeth mesh together, limiting the lower connecting sleeve 702, thereby limiting the nut 2, and effectively preventing the nut 2 from loosening from the screw rod 1.

[0025] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0026] 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 hardware screw with an anti-slip effect, comprising a screw rod (1), a limit head (5) is arranged on the outer side of the screw rod (1), and the characteristics are: Also includes: A nut (2) is arranged on the outside of the screw rod (1) for limiting the position, a limiting component (3) is arranged inside the nut (2) to prevent the screw rod (1) from loosening, and a return spring (4) is arranged on the outside of the limiting component (3); A connecting component (6) is arranged on the outside of the screw rod (1), and an anti-loosening component (7) is arranged on the outside of the connecting component (6) to prevent the nut (2) from loosening.

2. The metal screw with anti-slip effect according to claim 1, characterized in that: The position limiting assembly (3) comprises a fixing rod (301) arranged inside the nut (2), a ratchet pawl (302) is arranged on the outside of the fixing rod (301), and ratchet teeth (303) are arranged on the outside of the screw rod (1).

3. The hardware screw with anti-slip effect according to claim 1, characterized in that: One end of the return spring (4) is welded to the inner wall of the nut (2), and the other end is welded to the ratchet (302).

4. The hardware screw with anti-slip effect according to claim 1, characterized in that: The connecting assembly (6) comprises a fixing sleeve (601) arranged on the outside of the screw rod (1), and a tension spring (602) is arranged on the outside of the fixing sleeve (601).

5. The hardware screw with anti-loosening effect according to claim 4, characterized in that: The anti-loosening component (7) comprises an upper connecting sleeve (701) arranged on the outside of the tension spring (602), a lower connecting sleeve (702) is arranged on the outside of the upper connecting sleeve (701), and oblique teeth (703) are arranged on the outsides of the upper connecting sleeve (701) and the lower connecting sleeve (702).

6. The metal screw with anti-loosening effect according to claim 5, characterized in that: The lower connecting sleeve (702) is provided with a through groove (8) inside, and a thread is provided inside the through groove (8).

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