An anti-loosening expansion bolt for asphalt pavement

Abstract

This utility model relates to an anti-loosening expansion bolt for asphalt pavement, comprising a threaded section, a raised section, a barb assembly, and a nut. During the actual installation of asphalt pavement guardrails, holes can be drilled in the asphalt pavement. The barb is then rotated and retracted into a receiving groove. The threaded section and raised section are then placed into the drilled hole. The nut is then rotated using a tool, causing it to engage with the ground and slowly pull the threaded section and raised section upwards. Simultaneously, the barb slowly pierces into the surrounding soil as it rises. Once the barb is fully extended, the resistance to nut rotation increases, stopping the rotation of the nut. The guardrail is then installed on top of the threaded section, thus achieving better fixation to the asphalt pavement and maintaining good grip even during hot weather, preventing the installation equipment from falling off.

Description

Technical Field

[0001] This utility model relates to the field of expansion bolt technology, and in particular to an anti-loosening expansion bolt for asphalt pavement. Background Technology

[0002] Expansion bolts are a special type of threaded fastener used to fix pipe supports, hangers, brackets, or equipment to walls, floors, or the ground.

[0003] Asphalt pavement refers to various types of road surfaces constructed by incorporating road asphalt materials into mineral materials. Asphalt binders improve the ability of paving aggregates to resist damage to the road surface from traffic and natural factors, resulting in a smooth, dust-free, impermeable, and durable road surface.

[0004] However, in order to better ensure that asphalt pavement does not develop defects such as waves, shoving, rutting, and bulging under repeated traffic loads during the high-temperature season, the strength and stiffness of asphalt pavement decrease significantly with the increase of temperature. As a result, the fixing effect of traditional expansion bolts on asphalt pavement decreases during the high-temperature season due to the softening of the asphalt pavement. This often causes the guardrails installed at the edge of the asphalt pavement to tilt and reduces the protective effect of the impact guardrails at the edge of the asphalt pavement. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the aforementioned problems in the prior art, this utility model provides an anti-loosening expansion bolt for asphalt pavement, which can better fix the bolt to the asphalt pavement and still maintain a good gripping effect during the high-temperature season of the asphalt pavement, preventing the installation equipment from falling off.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the main technical solutions adopted by this utility model include:

[0009] An anti-loosening expansion bolt for asphalt pavement includes a threaded section, a raised section, a barb assembly, and a nut. The raised section is provided at the bottom of the threaded section, and a plurality of receiving grooves are provided on the raised section. One of the barb assemblies is connected to one of the receiving grooves, and the nut is threadedly connected to the upper part of the threaded section.

[0010] The barb assembly includes a pivot and barbs, with one side of the barb rotatably connected to the receiving groove via the pivot.

[0011] Furthermore, it also includes a washer, which is disposed below the nut and is fitted over the outside of the threaded section.

[0012] Furthermore, it also includes an auxiliary sleeve, which is sleeved on the outside of the threaded section, positioned below the gasket, and positioned above the barb assembly.

[0013] Furthermore, the auxiliary sleeve is provided with several expansion grooves.

[0014] Furthermore, the protruding segment is in the shape of an inverted frustum.

[0015] Furthermore, the upper part of each barb side is provided with a rounded chamfer, and the lower part of each barb side is provided with a support portion, which is used to support the barbs to each other.

[0016] (III) Beneficial Effects

[0017] The beneficial effects of this utility model are as follows: In the actual installation process of asphalt pavement guardrails, holes can be drilled in the asphalt pavement, and then the barbs can be rotated and retracted into the receiving groove. Then, the threaded section and the raised section are placed into the drilled hole. Then, the nut is rotated by a tool, so that the nut cooperates with the ground to slowly pull the threaded section and the raised section upward. At the same time, the barbs slowly pierce into the surrounding soil as they rise. After the barbs are fully extended, the resistance to rotating the nut increases, so the nut is stopped. Then, the guardrail is installed on the upper part of the threaded section, which can better fix it to the asphalt pavement. It also has a good gripping effect in the high temperature season of the asphalt pavement, preventing the installation equipment from falling off. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the anti-loosening expansion bolt for asphalt pavement according to an embodiment of the present invention.

[0019] Figure 2 This is a bottom view of the overall structure of the anti-loosening expansion bolt for asphalt pavement according to an embodiment of the present invention.

[0020] Figure 3 This is a schematic diagram showing the unfolded barbs of the anti-loosening expansion bolt for asphalt pavement according to an embodiment of the present invention.

[0021] Figure 4 This is a schematic diagram illustrating the storage and transportation of barbs on an anti-loosening expansion bolt for asphalt pavement, according to an embodiment of this utility model.

[0022] Figure 5 This is a schematic diagram of the barb assembly structure in the anti-loosening expansion bolt for asphalt pavement according to an embodiment of the present invention;

[0023] [Explanation of Labels in the Attached Image]

[0024] 1. Threaded section; 2. Nut; 3. Auxiliary sleeve; 4. Protruding section; 5. Barb; 6. Expansion groove; 7. Gasket; 8. Receiving groove; 9. Rotating shaft; 10. Support section. Detailed Implementation

[0025] To better explain and facilitate understanding of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] Please refer to Figures 1 to 5 As shown, the present invention provides an anti-loosening expansion bolt for asphalt pavement, comprising a threaded section 1, a raised section 4, a barb assembly, and a nut 2. The raised section 4 is provided at the bottom of the threaded section 1, and a plurality of receiving grooves 8 are provided on the raised section 4. One of the barb assemblies is connected to one of the receiving grooves 8, and the nut 2 is threadedly connected to the upper part of the threaded section 1.

[0027] The barb assembly includes a rotating shaft 9 and barbs 5, one side of which is rotatably connected to the receiving groove 8 via the rotating shaft 9.

[0028] The working principle of this utility model is as follows: During the actual installation of asphalt road guardrails, holes can be drilled in the asphalt road surface. Then, the barbs 5 are rotated and retracted into the receiving groove 8. Then, the threaded section 1 and the raised section 4 are placed into the drilled holes. Then, the nut 2 is rotated by a tool, so that the nut 2 cooperates with the ground to slowly pull the threaded section 1 and the raised section 4 upward. At the same time, the barbs 5 slowly pierce into the surrounding soil as they rise. After the barbs 5 are fully extended, the rotation resistance of the nut 2 increases, so the rotation of the nut 2 is stopped. Then, the guardrail is installed on the upper part of the threaded section 1.

[0029] Furthermore, it also includes a washer 7, which is provided below the nut 2 and is sleeved on the outside of the threaded section 1.

[0030] As can be seen from the above description, it is beneficial to increase the contact area between the nut 2 and the ground, so that the nut 2 can better lift the threaded section 1.

[0031] Furthermore, it also includes an auxiliary sleeve 3, which is sleeved on the outside of the threaded section 1, located below the gasket 7, and located above the barb assembly.

[0032] As can be seen from the above description, it is beneficial to pre-open the barb 5 with the auxiliary sleeve 3 before installation, so that the nut 2 can squeeze the upper part of the auxiliary sleeve 3 with the washer 7 and open the lower part of the auxiliary sleeve 3 to make the barb 5 better penetrate into the interior of the asphalt pavement during the rising process.

[0033] Furthermore, the auxiliary sleeve 3 is provided with a plurality of expansion grooves 6.

[0034] As can be seen from the above description, when used on hard surfaces, the auxiliary sleeve 3 can be installed in reverse so that the auxiliary sleeve 3 completely covers the barb 5. During the upward movement of the threaded section 1, the auxiliary sleeve 3 is squeezed by the protruding section 4, causing the expansion groove 6 on the auxiliary sleeve 3 to twist and deform. The deformed part is used to clamp the mounting hole, and the whole device can be used as an ordinary expansion bolt.

[0035] Furthermore, the protruding segment 4 is in the shape of an inverted frustum.

[0036] As can be seen from the above description, the protruding section 4 is better able to squeeze the auxiliary sleeve 3.

[0037] Furthermore, each of the barbs 5 has a rounded chamfer on the upper part of one side, and a support part 10 is provided on the lower part of one side of the barb 5. The support part 10 is used to support the barbs 5 against each other.

[0038] As can be seen from the above description, the upper part of one side of the barb 5 is facilitated by the rounded chamfer to make the barb 5 easier to unfold, and after the barb 5 is unfolded, the support part 10 supports each barb 5 to prevent the barb 5 from unfolding at too large an angle and losing the effect of the barb 5. Example 1

[0039] Please refer to Figures 1 to 5 An anti-loosening expansion bolt for asphalt pavement includes a threaded section 1, a raised section 4, a barb assembly, and a nut 2. The raised section 4 is provided at the bottom of the threaded section 1, and a plurality of receiving grooves 8 are provided on the raised section 4. One of the barb assemblies is connected to one of the receiving grooves 8, and the nut 2 is threadedly connected to the upper part of the threaded section 1.

[0040] The threaded section 1 and the protruding section 4 are an integrated structure;

[0041] The threaded section 1, the protruding section 4, and the barb 5 are all made of stainless steel.

[0042] The barb assembly includes a rotating shaft 9 and barbs 5, one side of which is rotatably connected to the receiving groove 8 via the rotating shaft 9;

[0043] The length of the barb 5 is less than 40% of the overall length of the threaded section 1, which facilitates the unfolding of the barb 5.

[0044] It also includes a washer 7, which is provided below the nut 2 and is sleeved on the outside of the threaded section 1;

[0045] It also includes an auxiliary sleeve 3, which is sleeved on the outside of the threaded section 1, located below the gasket 7, and located above the barb assembly.

[0046] The auxiliary sleeve 3 is movably connected to the threaded section 1;

[0047] The auxiliary sleeve 3 is provided with a number of expansion grooves 6;

[0048] The protruding section 4 is in the shape of an inverted frustum;

[0049] The upper part of one side of each barb 5 is provided with a rounded chamfer, and the lower part of one side of each barb 5 is provided with a support part 10, which is used to support the barbs 5 to each other.

[0050] The above describes the basic principles, main features, and advantages of this utility model. All standard parts used in this utility model can be purchased from the market, and irregularly shaped parts can be customized according to the description and drawings. The specific connection methods for each part all adopt conventional methods such as bolts, rivets, and welding, which are mature technologies in the prior art. The machinery, parts, and equipment all adopt conventional models in the prior art, and the circuit connections adopt conventional connection methods in the prior art, which will not be detailed here.

[0051] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent modifications made based on the content of this utility model specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A debonding expansion bolt for asphalt pavements, characterized by: The application relates to a threaded segment, a convex segment, a barb assembly and a nut, the bottom of the threaded segment is provided with the convex segment, a plurality of accommodating grooves are arranged on the convex segment, one barb assembly is connected with one accommodating groove, and the upper portion of the threaded segment is threadedly connected with the nut. The barb assembly comprises a rotating shaft and a barb, one side of the barb is rotatably connected with the accommodating groove through the rotating shaft.

2. The anti-loose expansion bolt for asphalt pavement according to claim 1, wherein: The application further comprises a gasket, the lower portion of the nut is provided with the gasket, and the gasket is sleeved on the outside of the threaded segment.

3. The anti-loose expansion bolt for asphalt pavement according to claim 2, wherein: The application further comprises an auxiliary sleeve, the auxiliary sleeve is sleeved on the outside of the threaded segment, the auxiliary sleeve is arranged below the gasket, and the auxiliary sleeve is arranged above the barb assembly.

4. The anti-loose expansion bolt for asphalt pavement according to claim 3, wherein: A plurality of expansion grooves are arranged on the auxiliary sleeve.

5. The anti-loose expansion bolt for asphalt pavement according to claim 4, wherein: The convex segment is in the shape of an inverted circular table.

6. The anti-loose expansion bolt for asphalt pavement according to claim 1, wherein: The upper portion of one side of the barb is provided with a circular arc chamfer, and the lower portion of one side of the barb is provided with a supporting portion for mutually supporting the barbs.

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