Anchoring bolt type fastener helical spike for small radius curves

Abstract

The utility model discloses a kind of anchor bolt type fastener spiral spike for small radius curve, spiral spike is in order from bottom to top for outer thread section, light axis section, umbrella cap part and square shaft section, the position corresponding with spike hole is equipped with pre-buried sleeve on sleeper, pre-buried sleeve has internal thread, thread section is connected with pre-buried sleeve thread;Light axis section is used to pass through spike hole, and light axis section is fixedly equipped with limit protrusion at the position close to umbrella cap section, and the light axis area between limit protrusion and umbrella cap part forms activity area, and spacer is movably sleeved at activity area, and the inner ring diameter of spacer is less than limit protrusion;The upper end of spike hole is sunken fixed platform, the diameter of umbrella cap part is greater than light axis section and spike hole, umbrella cap part is pressed to make spacer press at fixed platform.This utility model improves the installation stability of gauge baffle of spiral spike, can provide larger track lateral bearing capacity, and disassembly and assembly overhaul are convenient, and destructiveness to sleeper is small.

Description

Technical Field

[0001] This utility model belongs to the technical field of railway fasteners for small radius curves, specifically relating to a spiral track spike of anchor bolt type for small radius curves. Background Technology

[0002] In the field of rail transit, whether it is high-speed railway, conventional railway, heavy-haul freight railway or urban rail transit, the design, construction and operation of curved tracks are more complex than those of straight tracks in terms of structural strength, material selection, line construction and operation and maintenance. In particular, railway lines with a curve radius of less than 600m have higher requirements for infrastructure and structural components.

[0003] Due to the large lateral forces on small-radius curves, rail overturning is significant, resulting in severe damage to rails, sleepers, and fasteners on site. This is particularly pronounced in recent years with the substantial increase in freight volume and train axle loads, exacerbating the damage to sleepers and fasteners and highlighting the problems associated with small-radius curves. While various railway bureaus in China have developed different sleepers and fasteners to address these issues, these solutions suffer from poor versatility, easy damage to rail rests, difficulties in on-site installation, and high costs.

[0004] Therefore, there is an urgent need to develop a new type of small-radius curve fastener that is simple in structure and easy to install, disassemble, and replace, in order to solve the above problems. As a key component of the small-radius curve fastener system, the helical spike mainly serves to connect the sleeper and the gauge plate. The quality and performance of the helical spike directly affect the fatigue life of the fastener system and the operational safety of the track. Utility Model Content

[0005] The purpose of this utility model is to provide a spiral track spike with anchor bolt type fastener for small radius curves.

[0006] To achieve the above-mentioned objectives, the present invention adopts the following technical solution:

[0007] A spiral rail spike with anchor bolt type fastener for small radius curves. The spiral rail spike passes through a rail spike hole in the gauge baffle to fix the gauge baffle to the sleeper. The spiral rail spike consists of an external thread section, a smooth shaft section, an umbrella cap section, and a square shaft section from bottom to top. A pre-embedded sleeve with internal threads is provided on the sleeper at the position corresponding to the rail spike hole. The threaded section is threaded to the pre-embedded sleeve. The smooth shaft section is used to pass through the rail spike hole. A limiting protrusion is fixedly provided on the smooth shaft section near the umbrella cap section. The smooth shaft area between the limiting protrusion and the umbrella cap section forms a movable area. A shim is movably fitted in the movable area, and the inner diameter of the shim is smaller than that of the limiting protrusion. The upper end of the rail spike hole is a recessed fixed platform. The diameter of the umbrella cap section is larger than that of the smooth shaft section and the rail spike hole. The umbrella cap section presses down to press the shim onto the fixed platform.

[0008] Based on the above, two rail spike holes are symmetrically arranged on the front and back of the gauge baffle.

[0009] Based on the above, multiple limiting protrusions are arranged along the circumference of the optical axis segment of the spiral track spike.

[0010] Based on the above, the square shaft section of the spiral rail spike has a square column structure.

[0011] Based on the above, the side of the umbrella cap closest to the square axis section is spherical, and the side closest to the square axis section is planar.

[0012] Based on the above, the outer diameter of the gasket is larger than that of the umbrella cap portion.

[0013] The beneficial effects of this utility model are:

[0014] The spiral rail spike design in this invention improves the installation stability of the gauge baffle, provides greater lateral load-bearing capacity of the track, and is easy to disassemble and maintain with minimal damage to the sleepers.

[0015] The spiral rail spike of this invention significantly improves its strength while maintaining its performance, making it less prone to breakage or deformation, and effectively reducing the amount of line maintenance. Attached Figure Description

[0016] Figure 1 This is a perspective view of the spiral rail spike in this utility model;

[0017] Figure 2 This is a front view of the spiral rail spike in this utility model;

[0018] Figure 3 This is an installation diagram of this utility model;

[0019] Figure 4 yes Figure 3 Schematic diagram of the A-A cross section;

[0020] Figure 5 yes Figure 4 Enlarged view of point B in the middle.

[0021] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the present invention. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0023] like Figures 1 to 5As shown, this embodiment discloses a spiral track spike for anchor bolt type fasteners for small radius curves, which is used in anchor bolt type fasteners for small radius curves.

[0024] With the extension direction of rail 8 as the front-to-back direction, the left and right sides of the rail bearing surface are shoulders. The anchor bolt type fasteners for small radius curves include gauge baffle 1, spiral spike 2, elastic strip 3, insulated gauge block 4 and rail pad 5.

[0025] Two rail spike holes are symmetrically arranged on the gauge baffle 1. A spiral rail spike 2 passes through these holes to fix the gauge baffle to the rail bearing surface. A spring clip is located near the shoulder of the gauge baffle 1, and the spring clip engages with the shoulder. A spring clip 3 is installed on the gauge baffle 1 using T-bolts 7. The head of the spring clip 3 is secured to the rail by an insulated gauge block 4, and the tail of the spring clip 3 rests at the spring clip location. A rail pad 5 is located under the rail 8.

[0026] The spiral track spike consists of, from bottom to top, an external thread section 21, a smooth shaft section 22, an umbrella-shaped cap section 23, and a square shaft section 24.

[0027] An embedded sleeve 6 is provided on the sleeper at the position corresponding to the spike hole. The embedded sleeve 6 has an internal thread, and the threaded section 21 is threadedly connected to the embedded sleeve 6. The optical axis section 22 is used to pass through the spike hole, and a limiting protrusion 25 is fixedly provided on the optical axis section near the umbrella cap section. In this embodiment, multiple limiting protrusions 25 are arranged along the circumference of the optical axis section.

[0028] The optical axis region between the limiting protrusion 25 and the umbrella cap portion 23 forms a movable region. A gasket 26 is movably fitted in the movable region, with the inner diameter of the gasket 26 being smaller than that of the limiting protrusion 25 and the outer diameter of the gasket 26 being larger than that of the umbrella cap portion 23. The upper end of the track spike hole is a recessed fixing platform 11. The diameter of the umbrella cap portion 23 is larger than that of the optical axis section and the track spike hole. The umbrella cap portion 23 presses down, causing the gasket 26 to press against the fixing platform 11.

[0029] In this embodiment, the side of the umbrella cap 23 closest to the square shaft section is spherical, and the side closest to the square shaft section is flat. The spherical design can reduce the accumulation of dust and debris, and the flat design makes it easy to fit with the gasket.

[0030] In this embodiment, the square shaft segment 24 is a square column structure, which facilitates the application of force.

[0031] The spiral rail spikes improve the installation stability of the gauge baffle through the above design, provide greater lateral load-bearing capacity of the track, and are easy to disassemble and maintain with minimal damage to the sleepers.

[0032] Meanwhile, the spiral rail spikes in this invention significantly improve their strength while maintaining their performance, making them less prone to breakage or deformation, and effectively reducing the amount of track maintenance required.

[0033] The above embodiments are only used to illustrate and not limit the technical solutions of this utility model. Although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the utility model without departing from the spirit and scope of the utility model. Any modifications or partial substitutions should be covered within the scope of the claims of this utility model.

[0034] If the terms "first" or "second" are used in this document to define the components, those skilled in the art should know that the use of "first" or "second" is merely for the convenience of describing this utility model and simplifying the description, and unless otherwise stated, the above terms have no special meaning.

[0035] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to 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 utility model.

[0036] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

Claims

1. A spiral rail spike with anchor bolt type fastener for small radius curves, wherein the spiral rail spike passes through a rail spike hole in a gauge baffle for fixing the gauge baffle to a sleeper, characterized in that: The spiral rail spike consists of an external thread section, a smooth shaft section, an umbrella cap section, and a square shaft section from bottom to top. A pre-embedded sleeve with internal threads is installed on the sleeper at the position corresponding to the rail spike hole. The threaded section is threadedly connected to the pre-embedded sleeve. The smooth shaft section passes through the rail spike hole. A limiting protrusion is fixedly installed on the smooth shaft section near the umbrella cap section. The smooth shaft area between the limiting protrusion and the umbrella cap section forms a movable area. A shim is movably fitted in the movable area, and the inner diameter of the shim is smaller than that of the limiting protrusion. The upper end of the rail spike hole is a recessed fixed platform. The diameter of the umbrella cap section is larger than that of the smooth shaft section and the rail spike hole. The umbrella cap section presses down, causing the shim to press against the fixed platform.

2. A small radius curve anchorage bolt type fastener helical spike in accordance with claim 1 characterised by: The gauge baffle has two rail spike holes arranged symmetrically front and back.

3. The small radius curve anchorage bolted clip helical spike of claim 1 wherein: Multiple limiting protrusions are arranged around the optical axis of the spiral track spike.

4. The small radius curve anchorage bolted clip helical spike of claim 1 wherein: The square shaft section of the spiral rail spike has a square column structure.

5. The small radius curve anchorage bolted clip helical spike of claim 1 wherein: The side of the umbrella cap closest to the square axis section is spherical, and the side closest to the square axis section is planar.

6. The small radius curve anchorage bolted clip helical spike of claim 1 wherein: The outer diameter of the gasket is larger than that of the umbrella cap.

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