Improved anti-falling screw

Abstract

The improved anti-falling screw comprises a screw rod part, the screw rod part comprises a thread part, at least four sets of limiting plates which are evenly distributed in the circumferential direction are arranged on the plane of the upper end of the thread part, the outer sides of the limiting plates obliquely protrude out of the outer side of the thread part from bottom to top, and a fixing groove is formed in the center of the upper end face of the thread part downwards. Threads are arranged on the groove wall of the fixing groove, the limiting plates are arranged on the outer side of the fixing groove, the screw end is inserted between the limiting plates, the screw end comprises a top, a limiting portion is arranged at the lower end of the top, a connecting portion is arranged at the lower end of the limiting portion, the connecting portion is connected with the fixing groove, the limiting portion abuts against the limiting plates, and the lower end of the top abuts against the upper ends of the limiting plates. The end portion of the screw is matched with the rod portion of the screw, the limiting plate abuts against the threaded hole connected with the screw in a limiting mode, the screw is stably connected with the threaded hole in cooperation with the reverse threads on the limiting plate, and the anti-loosening performance of the screw is guaranteed.

Description

Technical Field

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

[0002] One of the ways to fix parts of existing products is screw fastening. However, under vibration conditions, the screw fastening method tends to gradually loosen. In order to improve the anti-loosening performance of the screws and ensure the safe use of the screws, fixing glue can be used for auxiliary fixation. However, the use of glue is time-sensitive and its cost is relatively high. Therefore, the conventional screw structure needs to be further improved to enhance its anti-loosening performance. Utility Model Content

[0003] The utility model aims to provide an improved screw which can ensure the tightening and anti-loosening effect in view of the deficiencies existing in the above-mentioned background technology.

[0004] In order to achieve the above-mentioned purpose, the utility model provides an improved anti-slip screw, which adopts the following technical solutions:

[0005] An improved anti-slip screw comprises a screw rod, which comprises a threaded portion, and the upper end plane of the threaded portion is provided with at least four groups of circumferentially evenly arranged limit plates, the outer side of the limit plates is inclined from bottom to top and protrudes from the outer side of the threaded portion, a fixing groove is provided downwardly from the center of the upper end surface of the threaded portion, and a thread is provided on the groove wall of the fixing groove, the limit plates are arranged on the outer side of the fixing groove, and screw ends are inserted between the limit plates, the screw ends comprise a top, a limiting portion is provided at the lower end of the top, a connecting portion is provided at the lower end of the limiting portion, the connecting portion is connected to the fixing groove, the limiting portion abuts against the limiting plate, and the lower end of the top abuts against the upper end of the limiting plate.

[0006] A further improvement of the improved anti-slip screw of the utility model is that a horizontal extension plate is provided outwardly on the upper end surface of the limiting plate, and a gasket is arranged on the lower end surface of the top, and the gasket is flush with the extension plate.

[0007] A further improvement of the improved anti-slip screw of the utility model is that a reverse thread which is opposite to the thread on the threaded part is arranged on the outer side wall of the limiting plate.

[0008] A further improvement of the improved anti-slip screw of the utility model is that a positioning groove is downwardly provided on the lower end surface of the fixing groove, the positioning groove is used to engage with an external positioning tool to realize the rotation of the screw, and the cross section of the positioning groove is square.

[0009] Compared with the prior art, the beneficial effects of the utility model are:

[0010] The utility model realizes the limiting contact between the limit plate and the threaded hole connected with the screw by matching the screw end with the screw rod, and matches the reverse thread on the limit plate to realize the stable connection between the screw and the threaded hole, thereby ensuring the anti-loosening performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the utility model;

[0012] In the figure: 10 screw rod, 11 threaded portion, 12 limit plate, 13 fixing groove, 14 extension plate, 15 positioning groove, 20 screw end, 21 top, 22 limit portion, 23 connecting portion. DETAILED DESCRIPTION

[0013] 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.

[0014] like Figure 1 As shown, an improved anti-slip screw comprises a screw shank 10, the screw shank comprises a threaded portion 11, at least four groups of circumferentially evenly arranged limiting plates 12 are provided on the upper end plane of the threaded portion, the outer side of the limiting plates is inclined from bottom to top and protrudes from the outer side of the threaded portion, a fixing groove 13 is provided downwardly from the center of the upper end surface of the threaded portion, a thread is provided on the groove wall of the fixing groove, the limiting plates are arranged on the outer side of the fixing groove, a screw end 20 is inserted between the limiting plates, the screw end comprises a top 21, a limiting portion 22 is provided at the lower end of the top, a connecting portion 23 is provided at the lower end of the limiting portion, the connecting portion 23 is connected to the fixing groove 13, the limiting portion 22 abuts against the limiting plate 12, and the lower end of the top abuts against the upper end of the limiting plate. The limiting part is cylindrical, and an elastic part can be arranged on the outside of the limiting part to abut against the limiting plate. The inner side of the limiting plate can also be designed to be inclined from bottom to top, and the inclination direction is toward one side of the limiting part; on the one hand, the stability of the abutment between the limiting plate and the threaded hole is improved, and on the other hand, the end of the screw after arrangement is further limited to ensure the stability of the connection between the two, thereby indirectly ensuring the stability of the screw as a whole.

[0015] Furthermore, a horizontal extension plate 14 is provided on the upper surface of the limit plate, and a gasket is arranged on the lower surface of the top, and the gasket is flush with the extension plate. The arrangement of the extension plate and the gasket further increases the connection stability between the screw as a whole and the threaded hole and the fastened object.

[0016] The outer wall of the limiting plate is provided with a reverse thread which is opposite to the thread on the threaded part.

[0017] Furthermore, a positioning groove 15 is downwardly provided on the lower end surface of the fixing groove, and the positioning groove is used to engage with an external positioning tool to realize the rotation of the screw, and the cross section of the positioning groove is square.

[0018] The working principle of the utility model is: use a tool to rotate the screw rod to connect the threaded hole, then insert the end of the screw between the limiting plates, and then rotate the top to make the connecting part stably connected to the fixing groove. At this time, the limiting part contacts the limiting plate, and at the same time, the limiting plate is stretched outward to further contact the threaded hole, so as to achieve the stability of the overall connection of the screw to the threaded hole and improve the anti-loosening performance.

[0019] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. An improved anti-slip screw, characterized in that: It includes a screw rod portion, which includes a threaded portion. The upper end plane of the threaded portion is provided with at least four groups of limiting plates evenly arranged in the circumferential direction. The outer side of the limiting plate is inclined from bottom to top and protrudes from the outer side of the threaded portion. A fixing groove is provided downwardly from the center of the upper end surface of the threaded portion. The groove wall of the fixing groove is provided with a thread. The limiting plate is arranged on the outer side of the fixing groove. The screw end is inserted between the limiting plates. The screw end includes a top. A limiting portion is provided at the lower end of the top. A connecting portion is provided at the lower end of the limiting portion. The connecting portion is connected to the fixing groove. The limiting portion abuts against the limiting plate, and the lower end of the top abuts against the upper end of the limiting plate.

2. The improved anti-slip screw according to claim 1, characterized in that: A horizontal extension plate is disposed outwardly on the upper end surface of the limiting plate, and a gasket is disposed on the lower end surface of the top, and the gasket is flush with the extension plate.

3. The improved anti-slip screw according to claim 2, characterized in that: The outer side wall of the limiting plate is provided with a reverse thread which is opposite to the thread on the threaded part.

4. The improved anti-slip screw according to claim 3, characterized in that: A positioning groove is downwardly arranged on the lower end surface of the fixing groove, and the positioning groove is used to engage with an external positioning tool to realize the rotation of the screw, and the cross section of the positioning groove is square.

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