Detachable stop screw

Abstract

The utility model discloses a detachable stop screw in the field of fasteners. The detachable stop screw comprises a screw body and a limiting assembly. The screw body is composed of a nut and a screw rod, a cross-shaped fixing groove is formed in the top of the nut, a through hole is formed in the side portion of the cross-shaped fixing groove, and a fixing plug is arranged in the through hole. A fixing groove is formed in the screw rod; the limiting assembly is composed of an abutting strip and an extrusion strip, an elastic piece is arranged on the outer side of the abutting strip, and multiple sets of sawteeth are arranged on the outer side of the elastic piece. The extrusion strip is arranged between the inner side face of the abutting strip and the fixing groove. The anti-loose screw is novel in structure, the detachable limiting assembly is adopted, the anti-loose function of the screw can be achieved, follow-up disassembly is facilitated, and the disassembly and assembly efficiency is high.

Description

Technical Field

[0001] The utility model relates to the field of fixing parts, in particular to a detachable anti-loosening screw. Background Art

[0002] Anti-loosening screws are fasteners that can reduce or prevent thread loosening. Currently, the most widely used methods include elastic washers and physical anti-loosening glue. Under the conditions of impact, vibration and variable load, the bolts may loosen due to elastic washers, resulting in a decrease in preload, which may eventually lead to loosening of the nuts and failure of the threaded connection. Physical anti-loosening glue may become an obstacle when disassembly and reassembly are required. Therefore, it is urgent to provide a removable anti-loosening screw that is easy to use. Utility Model Content

[0003] The utility model aims to provide a detachable anti-loosening screw which has the advantages of anti-loosening and easy disassembly.

[0004] The purpose of the utility model is achieved as follows: a detachable anti-loosening screw, comprising a screw body and a limiting component;

[0005] The screw body is composed of a nut and a screw rod, the top of the nut is provided with a cross fixing groove, the side of the cross fixing groove is provided with a through hole, and a fixing plug is provided in the through hole; the screw rod is provided with a fixing groove;

[0006] The limiting component is composed of a resistance strip and an extrusion strip. A spring sheet is arranged on the outer side of the resistance strip, and a plurality of groups of saw teeth are arranged on the outer side of the spring sheet. The extrusion strip is placed between the inner side of the resistance strip and the fixing groove.

[0007] Preferably, the fixing groove is located in the upper area of ​​the middle of the screw rod and the top opening of the fixing groove is connected to the through hole, and the outer contour of the fixing groove is placed inside the outer contour of the through hole.

[0008] Preferably, the inner side surface of the interference strip and the outer side surface of the extrusion strip are both inclined surfaces, the interference strip is overall small at the top and large at the bottom, and the extrusion strip is overall large at the top and small at the bottom.

[0009] Preferably, the outer vertical surface of the spring piece is in an arc shape, and the opening between the spring piece and the abutment strip body and the opening between the saw teeth and the spring piece body are both facing upward.

[0010] Preferably, the length of the extrusion strip is greater than the length of the interference strip, and a recessed groove is provided on the outer side of the exposed end of the extrusion strip.

[0011] Preferably, the fixing plug is rotationally fixed to the through hole via a thread, the fixing plug is made of metal, a rubber layer is provided on the top of the fixing plug, and the bottom of the fixing plug abuts against the top end of the extrusion strip.

[0012] Preferably, when the interference strip is not subjected to force and is in an initial state and is inserted into the fixing groove, the spring sheet and the serrations will not interfere with the internal thread of the fixing hole.

[0013] Compared with the prior art, the utility model is beneficial in that:

[0014] 1. Use a limit assembly, and the serrations on the outside of the limit assembly will conflict with the internal threads of the fixing hole. When the screw rotates, the serrations will conflict with the internal threads of the fixing hole, thus preventing the screw from loosening.

[0015] 2. The limit assembly is composed of a resistance strip and an extrusion strip. The resistance strip can be squeezed by the extrusion strip, so that the spring piece and the serration are squeezed to match the internal thread of the fixing hole. At the same time, when removing the screw, you only need to take out the extrusion strip first and then the resistance strip to remove the screw, which is convenient and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the explosion structure of the utility model.

[0017] Figure 2 It is a structural schematic diagram of the utility model combination.

[0018] Among them, 1 is a screw body, 101 is a nut, 1011 is a cross fixing groove, 1012 is a through hole, 102 is a screw rod, 1021 is a fixing groove, 2 is a limiting component, 201 is a resistance strip, 2011 is a spring sheet, 20111 is a sawtooth, 202 is an extrusion strip, 2021 is a recessed groove, 3 is a fixing plug, and 4 is a rubber layer. DETAILED DESCRIPTION

[0019] The following is a description of the implementation of the present invention by means of specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0020] It should be noted that in the description of the present utility model, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the utility model product is usually placed when in use, which are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third" and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. Terms such as "horizontal", "vertical", and "overhanging" do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0021] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, it can be a mechanical connection, it can be an electrical connection, it can be a direct connection, it can be indirectly connected through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] like Figure 1-2 As shown, a removable anti-loosening screw comprises a screw body 1 and a limiting component 2;

[0023] The screw body 1 is composed of a nut 101 and a screw rod 102, which are connected as one body. A cross fixing groove 1011 is provided on the top of the nut 101, a through hole 1012 is provided on the side of the cross fixing groove, and a fixing plug 3 is provided in the through hole; a fixing groove 1021 is provided on the screw rod 102;

[0024] The limiting assembly 2 is composed of a resistance strip 201 and an extrusion strip 202 . A spring sheet 2011 is disposed on the outer side of the resistance strip 201 . A plurality of groups of saw teeth 20111 are disposed on the outer side of the spring sheet 2011 . The extrusion strip 202 is disposed between the inner side of the resistance strip 201 and the fixing groove 1021 .

[0025] like Figure 1 As shown, the fixing groove 1021 is located in the middle upward area of ​​the screw rod 102 and the top opening of the fixing groove 1021 is connected to the through hole 1012. The outer contour of the fixing groove 1021 is placed inside the outer contour of the through hole 1012 to ensure that the false strip can be inserted from the through hole and placed in the fixing groove.

[0026] like Figure 1 As shown, the inner side surface of the interference strip 201 and the outer side surface of the extrusion strip 202 are both inclined surfaces. The interference strip 201 is generally small at the top and large at the bottom, while the extrusion strip 202 is generally large at the top and small at the bottom. After the interference strip is put in, the extrusion strip is inserted, and the inclined surface of the extrusion strip will form a wedge-shaped sliding with the inclined surface of the interference strip, further ensuring that the spring piece and serration of the interference strip can match the internal thread of the fixing hole.

[0027] like Figure 1 As shown, the outer facade of the spring piece 2011 is arc-shaped, and the opening between the spring piece 2011 and the main body of the interference strip 201, and the opening between the serration 20111 and the main body of the spring piece 2011 are both upward, ensuring that the interference strip is inserted more smoothly. At the same time, with the opening upward, when the screw rotates, the serration can better interfere with the internal thread of the fixing hole to achieve limiting.

[0028] like Figure 1 As shown, the length of the extrusion strip 202 is greater than the length of the interference strip 201, and a recessed groove 2021 is provided on the outer side of the exposed end of the extrusion strip 202, which can form an interference with the protruding extrusion strip after the fixing plug 3 is screwed in, so that the extrusion strip further squeezes the interference strip; when the fixing plug is screwed out and the extrusion strip is taken out, the recessed groove can greatly facilitate the removal of the extrusion strip.

[0029] like Figure 1 As shown, the fixing plug 3 is rotationally fixed with the through hole 1012 through a thread, the fixing plug is made of metal, a rubber layer 4 is provided on the top of the fixing plug, and the bottom of the fixing plug abuts against the top end of the extrusion strip. The rubber layer can avoid hard contact between the fixing plug and the extrusion strip, and prevent deformation of both to affect subsequent use.

[0030] like Figure 1 As shown, the interference strip 201 is in an initial state without force. When inserted into the fixing groove 1021, the spring piece 2011 and the serration 20111 will not interfere with the internal thread of the fixing hole, ensuring that when the interference strip is taken out, the spring piece and the serration will not form an opposite force, making it easy to take out.

[0031] The working principle of the utility model is explained as follows: when in use, first screw the screw into the fixing hole, then insert the interference strip, then insert the extrusion strip between the interference strip and the fixing groove, and then rotate and fix it through the fixing plug; when taking it out, unscrew the fixing plug, take out the extrusion strip through the recessed groove, the interference strip will become loose, and the interference strip can be taken out, and finally the screw can be unscrewed.

[0032] The above-described embodiments are merely descriptions of preferred implementations of the present invention, and are not intended to limit the concept and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made by ordinary personnel in the field to the technical solution of the present invention should fall within the protection scope of the present invention, and the technical contents of the present invention for protection have been fully recorded in the claims.

Claims

1. A removable anti-loosening screw, characterized in that: It includes a screw body and a limit assembly; The screw body is composed of a nut and a screw rod, the top of the nut is provided with a cross fixing groove, the side of the cross fixing groove is provided with a through hole, and a fixing plug is provided in the through hole; the screw rod is provided with a fixing groove; The limiting component is composed of a resistance strip and an extrusion strip. A spring sheet is arranged on the outer side of the resistance strip, and a plurality of groups of saw teeth are arranged on the outer side of the spring sheet. The extrusion strip is placed between the inner side of the resistance strip and the fixing groove.

2. A removable anti-loosening screw according to claim 1, characterized in that: The fixing groove is located in the upper area of ​​the middle of the screw rod and the top opening of the fixing groove is connected with the through hole. The outer contour of the fixing groove is placed inside the outer contour of the through hole.

3. A removable anti-loosening screw according to claim 1, characterized in that: The inner side surface of the abutment strip and the outer side surface of the extrusion strip are both inclined surfaces. The abutment strip is generally small at the top and large at the bottom, while the extrusion strip is generally large at the top and small at the bottom.

4. A removable anti-loosening screw according to claim 1, characterized in that: The outer vertical surface of the spring piece is in an arc shape, and the opening between the spring piece and the abutment strip body and the opening between the saw teeth and the spring piece body are both facing upward.

5. The removable anti-loosening screw according to claim 1, characterized in that: The length of the extrusion strip is greater than that of the interference strip, and a concave groove is arranged on the outer side of the exposed end of the extrusion strip.

6. The removable anti-loosening screw according to claim 1, characterized in that: The fixing plug is rotatably fixed with the through hole through a thread, the fixing plug is made of metal, a rubber layer is arranged on the top of the fixing plug, and the bottom of the fixing plug abuts against the top end of the extrusion strip.

7. The removable anti-loosening screw according to claim 1, characterized in that: When the abutment strip is not subjected to force and is in an initial state and is inserted into the fixing groove, the spring sheet and the saw teeth will not interfere with the internal thread of the fixing hole.

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