Anti-loose rail fastener

Abstract

The embodiment of the application provides a loosening-proof guard rail fastener, and relates to the technical field of rail transit.The loosening-proof guard rail fastener comprises, from bottom to top, a sleeper, a rail pad and a rail; a spike is arranged on both sides of the rail and comprises a threaded part and a supporting part, the threaded part is threaded through the rail pad and the sleeper, and one side of the supporting part abuts against the rail; a pre-buried sleeve is pre-buried in the sleeper, a threaded hole that is matched with the threaded part is formed in the pre-buried sleeve, a protruding part is arranged at the small diameter of the threaded hole, and the protruding part is used for abutting against the small diameter of the threaded part; a loosening-proof washer comprises a connected horizontal section and a bent section, the horizontal section and the bent section have an included angle, the threaded part is threaded through the horizontal section, the horizontal section is overlapped on the rail, and the bent section extends downward and abuts against the sleeper; and a spring washer is arranged between the supporting part and the loosening-proof washer.The loosening-proof guard rail fastener can improve the loosening-proof property of the guard rail fastener.

Description

Technical Field

[0001] This invention relates to the field of rail transit technology, and more specifically, to an anti-loosening rail fastener. Background Technology

[0002] Guard rail fasteners are specialized connecting components used to secure and protect guard rails. They firmly fix the guard rails to sleepers or special bases next to the stock rails, and also serve to guide, protect, and withstand lateral forces. Guard rail fasteners are a crucial guarantee for railway traffic safety, especially on high-speed and heavy-haul railways. As the "joints" of this system, the reliability of guard rail fasteners directly affects whether the guard rails can function effectively in critical moments. If the fasteners loosen or fail, the guard rails may lose their protective function or even become obstacles themselves, leading to safety accidents.

[0003] Please refer to Figure 1 and Figure 2 , Figure 1 This is a structural diagram of an existing guard rail fastener. Figure 2 This is a schematic diagram of the traditional pre-embedded sleeve in the existing guard rail fastener. The rail 300 is fixed to the rail pad 200 by the rail spikes 400 on both sides. The rail spikes 400 are connected to the sleeper 100 through the traditional pre-embedded sleeve 900. Under the strong impact and vibration generated by the train, the rail spikes 400 are prone to loosening in the current guard rail fastener.

[0004] Therefore, there is an urgent need for a rail fastener with good anti-loosening performance. Summary of the Invention

[0005] The purpose of this invention is to provide an anti-loosening rail fastener that can improve the anti-loosening performance of the rail fastener.

[0006] The embodiments of the present invention can be implemented as follows: In a first aspect, the present invention provides an anti-loosening rail fastener, comprising: The sleepers, rail pads, and rails are arranged sequentially from bottom to top. Rail spikes are provided on both sides of the rail. Each rail spike includes a threaded portion and a support portion. The threaded portion passes through the rail pad and the sleeper in sequence, and one side of the support portion abuts against the rail. An embedded sleeve is pre-installed inside the sleeper. A threaded hole adapted to the threaded part is opened in the embedded sleeve. A protrusion is provided at the minor diameter of the threaded hole to abut against the minor diameter of the threaded part. The anti-loosening shim includes a horizontal section and a bent section connected together, the horizontal section and the bent section having an included angle, the threaded portion passing through the horizontal section, the horizontal section overlapping the rail, and the bent section extending downward and abutting against the sleeper. A spring washer is disposed between the support portion and the anti-loosening washer.

[0007] In an optional embodiment, the inner diameter of the protrusion is smaller than the minor diameter of the threaded portion, so that the threaded portion and the protrusion are in an interference fit.

[0008] In an optional embodiment, the embedded sleeve is made of an elastic material.

[0009] In an optional embodiment, the embedded sleeve is made of nylon.

[0010] In an optional embodiment, the anti-loosening guard rail fastener further includes a flexible gasket, which is disposed between the anti-loosening gasket and the rail.

[0011] In an optional embodiment, the curvature of the lower surface of the horizontal section is adapted to the curvature of the rail surface.

[0012] In an optional embodiment, the bottom of the support portion has a support surface that is adapted to the curvature of the lower surface of the horizontal segment.

[0013] In an optional implementation, the bent section extends vertically downward.

[0014] The beneficial effects of the anti-loosening guardrail fastener provided in this embodiment of the invention include: When installing anti-loosening rail fasteners, the rail is screwed into the pre-embedded sleeve. The protrusion inside the pre-embedded sleeve abuts against the rail spike, clamping the rail spike and increasing the friction force on the rail spike, thereby achieving the anti-loosening effect. Spring washers prevent loosening by continuously applying axial force and partially embedding themselves. The horizontal section of the anti-loosening pad overlaps with the rail at one end and is connected to the bent section that abuts against the sleeper at the other end, thus providing support for the rail spike and balancing the force on both sides of the rail spike, preventing the rail spike from loosening due to long-term unilateral force. Through the combination of various anti-loosening structures, the overall anti-loosening effect of the anti-loosening rail fastener is significant. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a structural schematic diagram of an anti-loosening guardrail fastener in the prior art; Figure 2 This is a schematic diagram of the structure of a traditional pre-embedded sleeve in existing technology; Figure 3 This is a structural schematic diagram of the anti-loosening guardrail fastener provided in this embodiment; Figure 4 for Figure 3 Enlarged view of section A in the middle; Figure 5 This is a schematic diagram of the track spike in the anti-loosening guardrail fastener provided in this embodiment; Figure 6 This is a schematic diagram of the anti-loosening gasket in the anti-loosening guardrail fastener provided in this embodiment.

[0017] Icons: 100-Sleeper; 200-Rail pad; 300-Rail; 400-Spittle spike; 410-Threaded section; 420-Support section; 421-Support surface; 500-Embedded sleeve; 510-Protrusion; 600-Anti-loosening gasket; 610-Horizontal section; 620-Bending section; 700-Spring washer; 800-Flexible gasket; 900-Traditional embedded sleeve. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0020] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0021] In the description of this invention, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed, they are only for the convenience of describing this invention 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, and therefore should not be construed as a limitation of this invention.

[0022] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0023] It should be noted that, where there is no conflict, the features in the embodiments of the present invention can be combined with each other.

[0024] Guard rail fasteners are specialized connecting components used to secure and protect guard rails, firmly fixing them to sleepers or dedicated bases alongside the stock rails. Guard rail fasteners serve to fix the guard rails, guide and protect them, and withstand lateral forces. They are a crucial guarantee for railway traffic safety, especially on high-speed and heavy-haul railways. The reliability and safety of the guard rail fasteners directly affect whether the guard rails can function effectively in critical moments. If the fasteners loosen or fail, the guard rails may lose their protective function or even become obstacles themselves, leading to safety accidents.

[0025] To address the aforementioned technical problems, this invention provides an anti-loosening guard rail fastener to improve its anti-loosening performance. The overall structure, working principle, and technical effects of the anti-loosening guard rail fastener provided by this invention are described in detail below through embodiments and accompanying drawings.

[0026] Please refer to Figures 3-6 This invention provides an anti-loosening guardrail fastener, which is applied in the field of rail transit technology, specifically, for fixing guardrails and has good anti-loosening performance.

[0027] The rail guard provided by this invention includes a sleeper 100, a rail pad 200, and a rail 300 arranged sequentially from bottom to top. The anti-loosening rail guard fastener provided by this invention includes a rail spike 400, a pre-embedded sleeve 500, an anti-loosening washer 600, and a spring washer 700. The rail spike 400 includes a threaded portion 410 and a support portion 420. The diameter of the support portion 420 is larger than the diameter of the threaded portion 410. When fixing the rail guard, the threaded portion 410 passes through the rail pad 200 and the pre-embedded sleeve 500 embedded in the sleeper 100 sequentially from top to bottom, and screws into the pre-embedded sleeve 500. One side of the support portion 420 abuts against the rail 300, thereby achieving the effect of pressing the rail 300 against the rail pad 200. An embedded sleeve 500 is pre-installed within the sleeper 100, and a threaded hole is provided within the embedded sleeve 500. The threaded hole is adapted to the threaded portion 410, so that the threaded portion 410 can be threaded through the embedded sleeve 500. Furthermore, a protrusion 510 is provided at the minor diameter of the threaded hole. It can be understood that the protrusion 510 is arranged around the thread of the threaded hole at the minor diameter. When the threaded portion 410 is threaded through the embedded sleeve 500, the protrusion 510 abuts against the minor diameter of the threaded portion 410, making the connection between the track spike 400 and the sleeper 100 tighter. The anti-loosening washer 600 includes a connected horizontal section 610 and a bent section 620, with an included angle between the horizontal section 610 and the bent section 620. A through hole is provided on the horizontal section 610 for the threaded portion 410 to pass through. The diameter of the through hole is larger than the diameter of the threaded portion 410 and smaller than the diameter of the support portion 420. The horizontal section 610 is located between the support 420 and the rail 300. One end of the horizontal section 610, away from the bent section 620, overlaps the rail 300. The bent section 620 extends downwards, and when the spike 400 is installed, its bottom abuts against the sleeper 100. A spring washer 700 is fitted onto the spike 400, and is positioned between the support 420 and the anti-loosening washer 600. When installing the spike 400, it is tightened until the spring washer 700 is flush against the horizontal section 610 and the support 420.

[0028] During the installation of the anti-loosening rail fastener, the rail spike 400 is screwed into the pre-embedded sleeve 500. The protrusion 510 inside the pre-embedded sleeve 500 abuts against the rail spike 400, clamping it and increasing the frictional force on the rail spike 400, thereby achieving the anti-loosening effect. Simultaneously, the spring washer 700 continuously applies axial force, ensuring that the rail spike 400 is always under stress, guaranteeing that the threads of the rail spike 400 and the pre-embedded sleeve 500 are subjected to pressure, generating frictional force. Figure 5The support part 420 also constantly abuts against the spring washer 700 and generates pressure, further increasing the friction. One end of the horizontal section 610 of the anti-loosening pad 600 overlaps with the rail 300, and the other end connects to the bent section 620 that abuts against the sleeper 100, thereby providing support for the rail spike 400, making the force on both sides of the rail spike 400 balanced, and preventing the rail spike 400 from loosening due to long-term unilateral force; through the combination of various anti-loosening structures, the overall anti-loosening effect of the anti-loosening rail fastener is significant.

[0029] Please refer to Figure 3 and Figure 4 In some optional embodiments, to further improve the anti-loosening effect of the anti-loosening guardrail fastener, the inner diameter of the protrusion 510 of the pre-embedded sleeve 500 is smaller than the minor diameter of the threaded portion 410. This ensures that when the rail spike 400 is threaded into the pre-embedded sleeve 500, the threaded portion 410 and the protrusion 510 are interference-fitted, thereby achieving a tight fixation of the rail spike 400 and obtaining a good anti-loosening effect. Furthermore, due to the interference fit between the threaded portion 410 and the protrusion 510, the pre-embedded sleeve 500 is made of an elastic material with a certain deformation to allow the rail spike 400 to be smoothly inserted into the pre-embedded sleeve 500. This allows it to be smoothly screwed in when the rail spike 400 is inserted. At the same time, after the rail spike 400 is screwed into the pre-embedded sleeve 500, the deformed pre-embedded sleeve 500 can squeeze and press against the rail spike 400, increasing the friction between the rail spike 400 and the sleeper 100, thereby achieving the anti-loosening effect of the rail spike 400. Specifically, in this embodiment, the embedded sleeve 500 is made of nylon. In some alternative embodiments, the embedded sleeve 500 may also be made of other elastic materials, such as thermoplastic elastomers, engineering plastic alloys, etc.

[0030] Please refer to Figure 3 and Figure 5 In some optional embodiments, the anti-loosening guard rail fastener further includes a flexible washer 800, which is sleeved on the rail spike 400 and positioned between the anti-loosening washer 600 and the rail 300. The flexible washer 800 can increase the friction between itself and the anti-loosening washer 600, as well as between itself and the bottom inclined surface of the rail 300, further improving the overall anti-loosening effect of the anti-loosening guard rail fastener.

[0031] Please refer to Figure 3 and Figure 6 In some optional embodiments, the curvature of the lower surface of the horizontal section 610 is adapted to the curvature of the surface of the rail 300, and the bottom of the support part 420 has a support surface 421, which is adapted to the curvature of the lower surface of the horizontal section 610, so that when the rail spike 400 is installed in place, the support part 420 of the rail spike 400 is in close contact with the spring washer 700, the spring washer 700 is in close contact with the anti-loosening washer 600, and the anti-loosening washer 600 is in close contact with the rail 300.

[0032] Please refer to Figure 6 In some alternative embodiments, the anti-loosening shim 600 is L-shaped, with the horizontal section 610 and the bent section 620 perpendicular to each other. When the rail spike 400 is installed, the bent section 620 extends vertically downward to abut against the sleeper 100, providing good support for the horizontal section 610. At the same time, the bent section 620 presses against the sleeper 100 to prevent the anti-loosening shim 600 from rotating.

[0033] In summary, the implementation principle of the anti-loosening rail fastener provided by the present invention is as follows: When installing the anti-loosening rail fastener, the rail spike 400 is screwed into the pre-embedded sleeve 500. The protrusion 510 in the pre-embedded sleeve 500 abuts against the rail spike 400, clamping the rail spike 400 and increasing the friction force on the rail spike 400, thereby achieving the anti-loosening effect. At the same time, the spring washer 700 resists loosening by continuously applying axial force and partially embedding itself. The horizontal section 610 of the anti-loosening washer 600 overlaps with the rail 300 at one end and is connected to the bent section 620 that abuts against the sleeper 100 at the other end, thereby providing support for the rail spike 400, so that the force on both sides of the rail spike 400 is balanced, and the rail spike 400 is prevented from loosening due to long-term unilateral force. Through the combination of various anti-loosening structures, the overall anti-loosening effect of the anti-loosening rail fastener is significant.

[0034] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A type of anti-loosening rail fastener, characterized in that, include: The sleepers, rail pads, and rails are arranged sequentially from bottom to top. Rail spikes are provided on both sides of the rail. Each rail spike includes a threaded portion and a support portion. The threaded portion passes through the rail pad and the sleeper in sequence, and one side of the support portion abuts against the rail. An embedded sleeve is pre-installed inside the sleeper. A threaded hole adapted to the threaded part is opened in the embedded sleeve. A protrusion is provided at the minor diameter of the threaded hole to abut against the minor diameter of the threaded part. The anti-loosening shim includes a horizontal section and a bent section connected together, the horizontal section and the bent section having an included angle, the threaded portion passing through the horizontal section, the horizontal section overlapping the rail, and the bent section extending downward and abutting against the sleeper. A spring washer is disposed between the support portion and the anti-loosening washer.

2. The anti-loosening guardrail fastener according to claim 1, characterized in that, The inner diameter of the protrusion is smaller than the minor diameter of the threaded portion, so that the threaded portion and the protrusion are in an interference fit.

3. The anti-loosening guardrail fastener according to claim 2, characterized in that, The embedded sleeve is made of elastic material.

4. The anti-loosening guardrail fastener according to claim 3, characterized in that, The embedded sleeve is made of nylon.

5. The anti-loosening guardrail fastener according to claim 1, characterized in that, The anti-loosening rail fastener also includes a flexible gasket, which is disposed between the anti-loosening gasket and the rail.

6. The anti-loosening guardrail fastener according to claim 1, characterized in that, The curvature of the lower surface of the horizontal section is adapted to the curvature of the rail surface.

7. The anti-loosening guardrail fastener according to claim 1, characterized in that, The bottom of the support has a support surface that is adapted to the curvature of the lower surface of the horizontal section.

8. The anti-loosening guardrail fastener according to claim 1, characterized in that, The bent section extends vertically downwards.

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