Antiskid screw

Abstract

The utility model discloses an anti-skidding screw which comprises a screw rod and a screw cap, a plurality of anti-skidding teeth are evenly distributed on the bottom face of the screw cap, and the anti-skidding teeth are distributed in a circumferential mode. At least one circle of annular glue flowing groove is formed in the bottom surface of the screw cap, and the annular groove penetrates through all the anti-skid teeth; at least one glue injection hole is formed in the glue flowing groove and penetrates through the screw cap; a circle of annular groove is formed in the position, close to the screw rod, of the bottom face of the screw cap, and a rubber ring is placed in the annular groove. According to the anti-skid screw, a double anti-skid mechanism of mechanical occlusion and material deformation is formed through the compounding effect of the anti-skid tooth structure and the colloid compound layer, meanwhile, after the screw is assembled, glue can be injected from the glue injection hole, the glue permeates gaps between the teeth through the glue flowing grooves after glue injection, the anti-skid performance of the screw is further improved after solidification, and the service life of the screw is prolonged. And the tooth structure can still keep effective meshing force under the high-pressure working condition.

Description

Technical Field

[0001] This utility model belongs to the field of fastener technology, and specifically relates to an anti-slip screw. Background Technology

[0002] As a fundamental fastening element, the anti-loosening performance of screws directly affects the stability and safety of mechanical structures. Under conditions of vibration, impact, or alternating loads, traditional screws often loosen and fail due to insufficient friction at the contact surface, potentially leading to serious consequences.

[0003] In the existing technology, there are two main ways to improve the anti-slip performance of screws: one is to process an anti-slip tooth structure on the bottom surface of the screw head to increase the friction by increasing the surface roughness. However, the single-layer tooth structure is prone to plastic deformation under high pressure conditions, which leads to a sharp drop in anti-slip performance after the tooth tip wears. The other is to use an independent anti-slip pad to compensate for the gap by the deformation of the elastomer material. However, such additional parts have problems such as complicated assembly and failure of the colloid due to hardening under high temperature. Utility Model Content

[0004] To address the aforementioned problems, this invention provides an anti-slip screw that effectively increases the friction of the contact surface and prevents the screw from loosening.

[0005] Therefore, the technical solution of this utility model is: an anti-slip screw, including a screw shank and a screw cap, wherein the bottom surface of the screw cap is provided with a plurality of evenly distributed anti-slip teeth, the anti-slip teeth being circumferentially distributed; the bottom surface of the screw cap is provided with at least one annular glue-flowing groove, and the annular groove penetrates all the anti-slip teeth; the glue-flowing groove is provided with at least one glue-injection hole, the glue-injection hole penetrating the screw cap; the bottom surface of the screw cap is provided with an annular groove near the screw shank, and a rubber ring is placed in the annular groove.

[0006] Based on the above scheme and as a preferred embodiment of the above scheme: the bottom surface of the screw cap is provided with a ring of glue flow groove, which divides the anti-slip teeth into outer ring teeth and inner ring teeth; some of the inner ring teeth are provided with at least one anti-overflow glue flow channel.

[0007] Based on the above scheme and as a preferred embodiment of the above scheme: the beginning of the anti-overflow adhesive channel is connected to the adhesive flow trough, the end of the anti-overflow adhesive channel extends to the annular groove, and the width of the anti-overflow adhesive channel gradually decreases from the beginning to the end.

[0008] Based on the above scheme and as a preferred embodiment of the above scheme: the outer ring tooth has a plurality of second protrusions on its side, and the second protrusions are dome-shaped structures.

[0009] Based on the above scheme and as a preferred embodiment of the above scheme: the glue flow groove is provided with a plurality of first protrusions, the height of the first protrusions being less than one-third of the depth of the glue flow groove.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] 1. Through the combined action of the anti-slip tooth structure and the adhesive composite layer, a dual anti-slip mechanism of mechanical interlocking and material deformation is formed. At the same time, after the screw is assembled, glue can be injected through the glue injection hole. After the glue is injected, the glue penetrates the gap between the teeth through the glue flow groove. After curing, it further improves the anti-slip performance of the screw, so that the tooth structure can still maintain effective interlocking force under high pressure conditions.

[0012] 2. An anti-overflow channel is set in the inner ring of the glue flow tank to form a directional flow system, which allows excess glue to flow to the inner ring and avoids overflow from the outer ring and contamination of the contact surface. This not only ensures the aesthetics of the outer side of the contact surface, but also greatly improves the utilization rate of the glue.

[0013] 3. Setting a first protrusion in the glue flow channel can increase the bonding force between the glue and the glue flow channel; setting a second protrusion on the outer ring teeth can generate micro-deformation of the contact surface during the pre-tightening stage, achieve initial anti-slip positioning, and improve anti-slip performance.

[0014] 4. The rubber ring embedded in the annular groove and the cured colloid form a double sealing barrier, maintaining a certain deformation compensation capability even under high-temperature conditions. When temperature changes cause changes in the contact surface gap, the rubber ring and the colloid composite layer can simultaneously produce elastic-plastic dual compensation, extending service life. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of Example 1;

[0016] Figure 2 This is a front view of the structure of Example 1;

[0017] Figure 3 This is a bottom view of the structure of Example 1;

[0018] Figure 4 This is a schematic diagram of the structure of Example 2;

[0019] Figure 5 This is a bottom view of the structure of Example 2;

[0020] Figure 6 This is a schematic diagram of the structure of Example 3;

[0021] Figure 7 This is a bottom view of the structure of Example 3.

[0022] The markings in the diagram are: screw rod 1, screw cap 2, anti-slip teeth 21, glue flow groove 22, glue injection hole 23, annular groove 24, anti-overflow glue channel 25, second protrusion 26, and first protrusion 27. Detailed Implementation

[0023] In the description of this utility model, it should be noted that the directional terms such as "center", "horizontal (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this utility model.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. Thus, the use of "first" and "second" to define a feature may explicitly or implicitly include one or more of that feature. In the description of this utility model, "several" or "a number" means two or more, unless otherwise explicitly specified.

[0025] Example 1

[0026] The anti-slip screw described in this embodiment includes a screw shank 1 and a screw cap 2. The bottom surface of the screw cap 2 is provided with a plurality of evenly distributed anti-slip teeth 21, which are circumferentially distributed. The bottom surface of the screw cap 2 is provided with an annular glue-flowing groove 22, which penetrates all the anti-slip teeth 21 and divides the anti-slip teeth 21 into outer ring teeth and inner ring teeth. The glue-flowing groove 22 is provided with at least one glue-injection hole 23, which penetrates the screw cap 2. The bottom surface of the screw cap 2 is provided with an annular groove 24 near the screw shank, and a rubber ring is placed in the annular groove 24.

[0027] At least one anti-overflow adhesive channel 25 is provided on some of the inner ring teeth; the anti-overflow adhesive channel 25 is connected to the adhesive flow groove 22 at the beginning and extends to the annular groove 24 at the end, and the width of the anti-overflow adhesive channel 25 gradually decreases from the beginning to the end.

[0028] In use, the rubber ring is fitted into the annular groove 24, with the rubber ring slightly protruding above the groove. Then, the screw shank 1 is driven into the surface to be fixed, so that the anti-slip teeth 21 on the bottom of the screw cap 2 contact the surface to be fixed, increasing the friction of the contact surface and improving the anti-slip performance. If further improvement of the screw's anti-slip performance is required, glue can be injected into the glue injection hole 23. Common glues such as epoxy resin glue and anaerobic glue can be used. After the glue is injected, it flows along the glue flow channel 22 until it fills the entire glue flow channel 22, and excess glue can flow into the inner ring along the anti-overflow glue flow channel 25, avoiding excessive glue overflow from the outer ring and contaminating the contact surface. This ensures the aesthetics of the outer side of the contact surface and greatly improves the utilization rate of the glue.

[0029] Example 2

[0030] The structure of this embodiment is the same as that of Embodiment 1, except that the outer ring teeth of the anti-slip teeth 21 are provided with several second protrusions 26 on their sides, and the second protrusions 26 are dome-shaped structures. The anti-slip teeth 21 increase the roughness of the contact surface and the engagement depth, thereby increasing the friction with the contact surface and resisting screw loosening. The added second protrusions 26 concentrate the contact pressure on a smaller area, increasing local pressure and enhancing the engagement effect. The combination of anti-slip teeth (large-scale anti-slip) and protrusions (small-scale anti-slip) can adapt to different surface roughness or deformation conditions, improving anti-slip performance.

[0031] Example 3

[0032] The structure of this embodiment is the same as that of Embodiment 1, except that: the glue delivery groove 22 is provided with a plurality of first protrusions 27, the height of which is less than one-third of the depth of the glue delivery groove, so as not to obstruct the flow of glue. The first protrusions 27 in the glue delivery groove 22 increase the bonding force between the glue and the glue delivery groove 22, allowing the screws to be fixed more tightly.

[0033] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. An anti-slip screw, comprising a screw shank and a screw head, wherein the bottom surface of the screw head is provided with a plurality of evenly distributed anti-slip teeth, the anti-slip teeth being circumferentially distributed; characterized in that: The bottom surface of the screw cap is provided with at least one annular groove for dispensing adhesive, and the annular groove passes through all the anti-slip teeth; the dispensing groove is provided with at least one injection hole, which passes through the screw cap; the bottom surface of the screw cap is provided with an annular groove near the screw shank, and a rubber ring is placed in the annular groove.

2. The anti-slip screw as described in claim 1, characterized in that: The bottom surface of the screw cap is provided with a ring of glue flow groove, which divides the anti-slip teeth into outer ring teeth and inner ring teeth; some of the inner ring teeth are provided with at least one anti-overflow glue flow channel.

3. The anti-slip screw as described in claim 2, characterized in that: The anti-overflow adhesive channel starts at the beginning and is connected to the adhesive flow trough. The end of the anti-overflow adhesive channel extends to the annular groove, and the width of the anti-overflow adhesive channel gradually decreases from the beginning to the end.

4. The anti-slip screw as described in claim 2, characterized in that: The outer ring teeth are provided with several second protrusions on their side, and the second protrusions are dome-shaped structures.

5. The anti-slip screw as described in claim 1, characterized in that: The glue-dispensing groove is provided with a number of first protrusions, the height of which is less than one-third of the depth of the glue-dispensing groove.

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