Stop screw

Abstract

The utility model discloses a stop screw which comprises a head portion and a rod portion which are integrated, a sliding hole is formed in the head portion, an extrusion rod is connected in the sliding hole in a sliding mode, a glue storage hole is formed in the rod portion, glue is filled in the glue storage hole, the sliding hole is communicated with the glue storage hole, one end of the extrusion rod extends into the glue storage hole, and the other end of the extrusion rod extends into the rod portion. The extending-in end of the extrusion rod slides in the glue storage hole in a sealed mode, a glue outlet hole is formed in the inner wall of the glue storage hole and extends outwards to the outer side of the rod part, a sealing film is arranged on an inner hole opening of the glue outlet hole, and a fixing mechanism is arranged between the head part and the extrusion rod and can inject glue into the space between the connected inner thread and the outer thread. Therefore, the anti-loosening effect of the screw is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of fasteners, and more specifically relates to an anti-loosening screw. Background Art

[0002] In the screw anti-loosening technology, common anti-loosening measures are to use gaskets or punch anti-loosening teeth on the lower surface of the screw head, but these anti-loosening measures all increase the friction between the screw head and the surface of the connector to achieve anti-loosening, but lack anti-loosening between the screw and the internal and external threads of the connector. Therefore, the anti-loosening effect of the current common anti-loosening measures is poor. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides an anti-loosening screw capable of injecting glue between connected internal and external threads to improve the anti-loosening effect.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a kind of anti-loosening screw, comprising an integrated head and a rod, the head is provided with a sliding hole, an extrusion rod is slidably connected in the sliding hole, a glue storage hole is provided in the rod, the glue storage hole is filled with glue, the sliding hole is communicated with the glue storage hole, one end of the extrusion rod extends into the glue storage hole, and the extended end of the extrusion rod slides in a sealed manner with the glue storage hole, a glue outlet hole is provided on the inner wall of the glue storage hole, the glue outlet hole extends outward to the outside of the rod, a sealing film is provided on the inner opening of the glue outlet hole, and a fixing mechanism is provided between the head and the extrusion rod.

[0005] The fixing mechanism includes a telescopic piece and a wedge block, the telescopic piece is slidably connected in the slide groove of the head, and one end of the telescopic piece extends out from the lower surface of the head, the telescopic piece is provided with a perforation, the wedge block is slidably connected inside the head, the extrusion rod is provided with a wedge groove, one end of the wedge block extends into the wedge groove and abuts against it through the wedge surface, the other end of the wedge block abuts against the telescopic piece, the sliding direction of the telescopic piece is perpendicular to the wedge block, and a spring is provided between the slide groove and the telescopic piece.

[0006] Furthermore, the end portion of the expansion piece extending out from the lower surface of the head is in an arc shape.

[0007] Furthermore, the end of the wedge block abutting against the expansion piece is in an arc shape.

[0008] Furthermore, there are a plurality of glue outlet holes, which are arranged vertically and circumferentially.

[0009] Compared with the prior art, the utility model has the following beneficial effects: first, the extrusion rod and the head are fixed by a fixing mechanism so that it cannot slide in the sliding hole. At this time, the screw can be connected. After the screw is tightened, the fixing mechanism is loosened, and pressure is applied to the extrusion rod toward the rod. The end of the extrusion rod located in the glue storage hole squeezes the glue. When the pressure of the glue exceeds the limit of the sealing film, the sealing film is squeezed and the glue can be discharged from the glue outlet hole. The discharged glue will penetrate between the external thread and the external internal thread on the screw rod. After the glue solidifies, the anti-loosening effect of the screw can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a schematic diagram of the structure of the anti-loosening screw of the utility model;

[0011] Figure 2 for Figure 1 Enlarged view of part A in the middle;

[0012] Figure 3 It is a schematic diagram of the structure of the expansion piece in the anti-loosening screw of the utility model after being retracted under pressure;

[0013] Figure 4 The utility model is a schematic diagram of the structure in which the end of the wedge-shaped block in the anti-loosening screw extends into the through hole.

[0014] Reference numerals: head 1; rod 2; sliding hole 3; extrusion rod 4; glue storage hole 5; glue outlet hole 6; wedge block 7; slide groove 8; through hole 9; wedge groove 10; spring 11; telescopic piece 12. DETAILED DESCRIPTION

[0015] In the description of the present invention, it should be noted that directional words, such as the terms "center", "lateral (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of narrating the present invention 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 cannot be understood as limiting the specific protection scope of the present invention.

[0016] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. Therefore, the definition of "first" and "second" features can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "several" and "a number" is two or more, unless otherwise clearly and specifically defined.

[0017] Reference Figures 1 to 4 The utility model is further described.

[0018] A locking screw comprises an integrated head 1 and a rod 2, wherein the head 1 is provided with a sliding hole 3, in which an extrusion rod 4 is slidably connected, a glue storage hole 5 is provided in the rod 2, the glue storage hole 5 is filled with glue, the sliding hole 3 is communicated with the glue storage hole 5, one end of the extrusion rod 4 extends into the glue storage hole 5, and the extended end of the extrusion rod 4 slides in a sealed manner with the glue storage hole 5, a glue outlet hole 6 is provided on the inner wall of the glue storage hole 5, the glue outlet hole 6 extends outward to the outside of the rod 2, a sealing film is provided on the inner opening of the glue outlet hole 6, and a fixing mechanism is provided between the head 1 and the extrusion rod 4.

[0019] like Figure 1 As shown, the extrusion rod 4 and the head 1 are first fixed by a fixing mechanism so that they cannot slide in the sliding hole 3. At this time, the screws can be connected. After the screws are tightened, the fixing mechanism is loosened, and pressure is applied to the extrusion rod 4 toward the rod 2. The end of the extrusion rod 4 located in the glue storage hole 5 squeezes the glue. When the pressure of the glue exceeds the limit of the sealing film, the sealing film is squeezed and the glue can be discharged from the glue outlet hole 6. The discharged glue will penetrate between the external thread and the external internal thread on the screw rod 2. After the glue solidifies, the anti-loosening effect of the screw can be improved.

[0020] Preferably, in this embodiment, a spline is provided between the extrusion rod 4 and the sliding hole 3 .

[0021] like Figure 1 As shown, in the present embodiment, preferably, the fixing mechanism comprises a telescopic piece 12 and a wedge block 7, the telescopic piece 12 is slidably connected in the slide groove 8 of the head 1, and one end of the telescopic piece 12 extends from the lower surface of the head 1, the telescopic piece 12 is provided with a perforation 9, the wedge block 7 is slidably connected inside the head 1, the extrusion rod 4 is provided with a wedge groove 10, one end of the wedge block 7 extends into the wedge groove 10 and abuts against it through the wedge surface, the other end of the wedge block 7 abuts against the telescopic piece 12, the telescopic piece 12 is perpendicular to the sliding direction of the wedge block 7, and a spring 11 is provided between the slide groove 8 and the telescopic piece 12.

[0022] like Figures 2 to 4 As shown, when the screw is tightened, the extended end of the expansion piece 12 contacts the surface of the external connecting member and is subjected to a reverse thrust, and the expansion piece 12 extends into the slide groove 8 of the head 1, so that the through hole 9 on the expansion piece 12 is aligned with the other end of the wedge block 7, that is, the end of the wedge block 7 can extend into the through hole 9. At this time, when force is applied to the extrusion rod 4, the extrusion rod 4 can slide, and the wedge block 7 moves toward the expansion piece 12 through the connection of the wedge surface.

[0023] like Figure 2As shown, in this embodiment, preferably, the end of the expansion piece 12 extending out from the lower surface of the head 1 is in an arc shape, which is convenient for reducing the contact area between the end of the expansion piece 12 and the surface of the external connecting part when the screw is rotated, making it easier for the screw to be screwed into the upper half of the threaded hole beyond the end of the wedge block 7, that is.

[0024] like Figure 2 and Figure 3 As shown, in the present embodiment, preferably, the end of the wedge block 7 abutting against the expansion piece 12 is in an arc shape, so that when the through hole 9 is not completely aligned with the end of the wedge block 7, the expansion piece 12 can be actively pushed upward by the arc-shaped end of the wedge block 7 so that the end extends into the through hole 9.

[0025] like Figure 1 As shown, in this embodiment, preferably, a plurality of glue outlet holes 6 are provided, which are arranged up and down and circumferentially, thereby increasing the adhesion to various parts of the thread.

[0026] In this example, preferably, when the sealing film on one of the glue outlet holes 6 breaks first, the glue overflows into the threaded gap there, and due to the viscosity of the glue, the continuous squeezing of the glue by the squeezing rod 4 can still increase the pressure of the glue in the glue storage hole 5 and cause the sealing films on the other glue outlet holes 6 to break.

[0027] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A locking screw, comprising an integral head and a stem, characterized in that: The head is provided with a sliding hole, in which an extrusion rod is slidably connected, a glue storage hole is provided in the rod part, the glue storage hole is filled with glue, the sliding hole is communicated with the glue storage hole, one end of the extrusion rod extends into the glue storage hole, and the extended end of the extrusion rod slides in a sealed manner with the glue storage hole, a glue outlet hole is provided on the inner wall of the glue storage hole, the glue outlet hole extends outward to the outside of the rod part, a sealing film is provided on the inner opening of the glue outlet hole, and a fixing mechanism is provided between the head and the extrusion rod.

2. The anti-loosening screw according to claim 1, characterized in that: The fixing mechanism includes a telescopic piece and a wedge block, the telescopic piece is slidably connected in the slide groove of the head, and one end of the telescopic piece extends out from the lower surface of the head, the telescopic piece is provided with a perforation, the wedge block is slidably connected inside the head, the extrusion rod is provided with a wedge groove, one end of the wedge block extends into the wedge groove and abuts against it through the wedge surface, the other end of the wedge block abuts against the telescopic piece, the sliding direction of the telescopic piece is perpendicular to the wedge block, and a spring is provided between the slide groove and the telescopic piece.

3. The anti-loosening screw according to claim 2, characterized in that: The end of the expansion piece extending out from the lower surface of the head is in an arc shape.

4. The anti-loosening screw according to claim 2, characterized in that: The end of the wedge block abutting against the expansion piece is in an arc shape.

5. The anti-loosening screw according to claim 1, characterized in that: The glue outlet holes are provided in a plurality, and are arranged vertically and circumferentially.

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