Anchorage bolt type fastener for small radius curves

Abstract

The utility model discloses a kind of anchoring bolt type fasteners for small radius curve, including gauge baffle, anchoring bolt type spike, elastic strip, insulating gauge block and rail pad;At least two spike holes are equipped on gauge baffle, anchoring bolt type spike is fixed in bearing surface by passing through spike hole and fixing gauge baffle;Anchoring bolt type spike is in turn outer thread section, light axle section, umbrella cap portion and square shaft section from bottom to top;The upside and downside of rail pad are all divided into multiple rectangular areas arranged in array, rectangular area is divided into large rectangular area and small rectangular area, large rectangular area and small rectangular area in same row and / or same column are alternately arranged;Large rectangular area is rectangular groove, and small rectangular area is rectangular projection.The utility model is simple in structure, and it is convenient to install, dismount and replace, guarantee the stability of line track geometry state and prolong the service life of sleeper and fastener, practically reduce small radius curve maintenance and repair workload.

Description

Technical Field

[0001] This utility model belongs to the technical field of railway fasteners for small radius curves, specifically relating to an anchor bolt type fastener 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 curved fastener that is simple in structure and easy to install, disassemble and replace, in order to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to provide an anchor bolt type fastener for small radius curves.

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

[0007] An anchor bolt type fastener for small radius curves, with the extension direction of the rail as the front-to-back direction, is installed on the rail bearing surface of the sleeper to fix the rail. The left and right sides of the rail bearing surface are shoulders. The fastener includes a gauge plate, anchor bolt type rail spikes, elastic clips, insulated gauge blocks, and rail pads. The gauge plate has at least two rail spike holes, through which the anchor bolt type rail spikes pass to fix the gauge plate to the rail bearing surface. The gauge plate has an elastic clip position near the shoulder, which abuts against the shoulder. The elastic clip is installed on the gauge plate by T-bolts, with the head of the elastic clip clamping the rail by the insulated gauge block, and the tail of the elastic clip landing at the elastic clip position.

[0008] The anchor bolt type 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.

[0009] The rail pad is located on the underside of the rail. The upper and lower sides of the rail pad are divided into multiple rectangular areas arranged in an array. The rectangular areas are further divided into large rectangular areas and small rectangular areas. The large rectangular areas and small rectangular areas are arranged alternately in the same row and / or the same column. The large rectangular areas are rectangular grooves, and the small rectangular areas are rectangular protrusions.

[0010] Preferably, the gauge baffle has two rail spike holes arranged symmetrically front and back.

[0011] Preferably, multiple limiting protrusions are arranged along the circumference of the optical axis segment of the anchor bolt-type track spike.

[0012] Preferably, the square shaft section of the anchor bolt type track spike has a square column structure.

[0013] Preferably, 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.

[0014] Preferably, the outer diameter of the gasket is larger than that of the umbrella cap portion.

[0015] Preferably, the large rectangular area on the upper side of the track pad corresponds to the small rectangular area on the lower side, and the small rectangular area on the upper side corresponds to the large rectangular area on the lower side.

[0016] Preferably, the left and right sides of the rail pad are provided with rectangular slots, which are engaged with the gauge baffle.

[0017] Preferably, the material of the track pad is thermoplastic polyester elastomer.

[0018] The beneficial effects of this utility model are:

[0019] 1. This utility model has a simple structure, is easy to install, disassemble and replace, ensures the stability of the track geometry and extends the service life of sleepers and fasteners, and effectively reduces the workload of maintenance and repair of small radius curves.

[0020] 2. The anchor bolt type track spike design in this utility model improves the installation stability of the gauge baffle, provides greater lateral bearing capacity of the track, and is convenient for disassembly, assembly, and maintenance, with minimal damage to the sleepers.

[0021] While maintaining its performance, the spiral rail spike has significantly improved strength, making it less prone to breakage or deformation, and effectively reducing the amount of track maintenance.

[0022] 3. The rail underplate of this utility model has excellent resilience, wear resistance and corrosion resistance. By absorbing impact energy, it can disperse the dynamic load of wheel and rail to the ballast layer, reduce the peak contact stress by about 30%, significantly reduce rail corrugation and sleeper cracks, reduce fatigue damage to the track structure, reduce the risk of track deformation and fracture, and thus enhance the safety of railway operation.

[0023] The track pad uses a combination of large rectangular grooves and small rectangular protrusions, which can improve the longitudinal resistance of the track and prevent longitudinal displacement of the track.

[0024] Because the lower pad has a long service life, it reduces the need for frequent maintenance and replacement, thus lowering operating costs compared to ordinary pads that need to be replaced every year. Attached Figure Description

[0025] Figure 1 This is a top view of the present invention;

[0026] Figure 2 yes Figure 1 Schematic diagram of the A-A cross section;

[0027] Figure 3 yes Figure 2 Enlarged view of point B in the middle;

[0028] Figure 4 This is a perspective view of the anchor bolt type road spike in this utility model;

[0029] Figure 5 This is a front view of the anchor bolt type road spike in this utility model;

[0030] Figure 6 This is a perspective view of the lower pad of the middle rail of this utility model;

[0031] Figure 7 This is a top view of the lower pad of the middle rail of this utility model;

[0032] Figure 8 yes Figure 7 Schematic diagram of the C-C cross section.

[0033] 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

[0034] 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.

[0035] like Figures 1 to 8 As shown, this embodiment discloses an anchor bolt type fastener for small radius curves, with the extension direction of the rail 8 as the front-to-back direction, and the left and right sides of the rail bearing surface as shoulders. The fastener includes a gauge baffle 1, an anchor bolt type rail spike 2, a spring strip 3, an insulated gauge block 4, and a rail pad 5.

[0036] Two rail spike holes are symmetrically arranged on the front and back of the gauge plate 1. Anchor bolt type rail spikes 2 pass through the rail spike holes to fix the gauge plate to the rail bearing surface. The gauge plate 1 is provided with a spring clip position near the shoulder, and the spring clip position abuts and cooperates with the shoulder. The spring clip 3 is installed on the gauge plate 1 by T-bolts 7. The head of the spring clip 3 is pressed against the rail by the insulated gauge block 4, and the tail of the spring clip 3 is placed at the spring clip position.

[0037] The anchor bolt type track spike consists of, from bottom to top, an external thread section 21, a smooth shaft section 22, an umbrella cap section 23, and a square shaft section 24.

[0038] 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.

[0039] 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.

[0040] 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 facilitates the mating with the gasket.

[0041] In this embodiment, the square shaft segment 24 is a square column structure, which facilitates the application of force.

[0042] The anchor bolt type track spike improves the installation stability of the gauge plate through the above design, can provide greater lateral bearing capacity of the track, and is easy to disassemble and maintain, with less damage to the sleepers.

[0043] The rail pad 5 is located on the underside of the rail. Rectangular slots 51 are symmetrically provided on the left and right sides of the rail pad 5. The rectangular slots 51 are engaged with the gauge baffle 1. The upper and lower sides of the rail pad 5 are divided into multiple rectangular areas arranged in an array. The rectangular areas are divided into large rectangular areas 52 and small rectangular areas 53. The large rectangular areas and small rectangular areas are arranged alternately in the same row and / or the same column. The large rectangular area 52 is a rectangular groove, and the small rectangular area 53 is a rectangular protrusion.

[0044] In this embodiment, the large rectangular area on the upper side of the rail pad corresponds to the small rectangular area on the lower side, and the small rectangular area on the upper side corresponds to the large rectangular area on the lower side.

[0045] The rail pads, through the above design, have excellent resilience. By absorbing impact energy with high resilience materials (optimized elastic modulus), they can disperse the dynamic load of wheel and rail to the ballast layer, reduce the peak contact stress by about 30%, significantly reduce rail corrugation and sleeper cracks, and extend service life.

[0046] The rail pads are made of thermoplastic polyester elastomer, exhibiting excellent wear resistance. Their structural strength is 2-6 times that of vulcanized rubber, and their tensile strength and tear strength are 2-6 times and 2-10 times that of natural rubber, respectively. This ensures stable performance over long-term use, with excellent oil and solvent resistance and wide-temperature range stability, reducing performance degradation in extreme environments and further extending service life. The rail pads also possess excellent corrosion resistance, outstanding oil resistance, swelling resistance, and penetration resistance, making them suitable for various oil environments, including fuel oil, hot oil, and hydraulic oil.

[0047] The track pad uses a combination of large rectangular grooves and small rectangular protrusions, which can improve the longitudinal resistance of the track and prevent longitudinal displacement of the track.

[0048] The application of rail pads can reduce fatigue damage to the track structure, lower the risk of track deformation and fracture, and thus enhance the safety of railway operation. Due to the long service life of rail pads, frequent maintenance and replacement work is reduced, resulting in a reduction of operation and maintenance costs (including labor and downtime losses) of more than 40% compared to replacing ordinary pads annually.

[0049] Existing rail pads tend to stick to the rails after a period of use, causing inconvenience for maintenance. However, the rail pads of this invention are less prone to sticking to the rails, greatly improving maintenance efficiency.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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 small-radius curve anchor bolt type fastener, with the direction of extension of the rail being the front-rear direction, the fastener being installed on the rail bearing surface of a sleeper for fixing a rail, the left and right sides of the rail bearing surface being shoulder blocks, characterized in that: The fasteners include a gauge plate, anchor bolt-type rail spikes, elastic clips, insulated gauge blocks, and rail pads. The gauge plate has at least two rail spike holes, through which the anchor bolt-type rail spikes pass to fix the gauge plate to the rail bearing surface. The gauge plate has an elastic clip position near the shoulder, which abuts against the shoulder. The elastic clip is installed on the gauge plate by T-bolts, with the head of the elastic clip fastening the rail by the insulated gauge block, and the tail of the elastic clip landing at the elastic clip position. The anchor bolt type 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. The rail pad is located on the underside of the rail. The upper and lower sides of the rail pad are divided into multiple rectangular areas arranged in an array. The rectangular areas are further divided into large rectangular areas and small rectangular areas. The large rectangular areas and small rectangular areas are arranged alternately in the same row and / or the same column. The large rectangular areas are rectangular grooves, and the small rectangular areas are rectangular protrusions.

2. The small-radius-curve anchor bolt type fastener according to claim 1, characterized by: The gauge baffle has two rail spike holes arranged symmetrically front and back.

3. The small-radius-curve anchor bolt type fastener according to claim 1, characterized by: Multiple limiting protrusions are arranged around the optical axis of the anchor bolt-type track spike.

4. The anchor bolt type fastener for small radius curves according to claim 1, characterized in that: The square shaft section of the anchor bolt type track spike has a square column structure.

5. The small-radius curve anchorage bolt-type fastener according to claim 1, characterized in that: 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 bolt-type fastener according to claim 1, characterized in that: The outer diameter of the gasket is larger than that of the umbrella cap.

7. The small-radius curve anchorage bolt-type fastener according to claim 1, characterized in that: The large rectangular area on the upper side of the track pad corresponds to the small rectangular area on the lower side, and the small rectangular area on the upper side corresponds to the large rectangular area on the lower side.

8. The small-radius curve anchorage bolt-type fastener of claim 7, wherein: The track pad is provided with rectangular slots on both the left and right sides, which engage with the track gauge baffle.

9. The anchor bolt type fastener for small radius curves according to claim 7 or 8, characterized in that: The material of the track pad is thermoplastic polyester elastomer.

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