Anti-rotation and pull-out spiral spike

Abstract

The utility model relates to a spiral spike, specifically relates to an anti-rotation anti-pulling spiral spike. Including lower spiral spike, the circumferential side wall annular array of lower spiral spike is equipped with three grooves, when lower spiral spike is anchored in anchoring agent, the groove and anchoring agent inlay form integrated structure, the upper end of lower spiral spike is provided with upper spiral spike coaxially, be provided with locking mechanism between upper spiral spike and lower spiral spike. The utility model discloses, after lower spiral spike is rotated and is spun into the hole of soft pillow that has filled anchoring agent in advance, in the anchoring agent that has not solidified flows and fills to the inside of groove, after anchoring agent solidification, the groove and anchoring agent inlay form integrated structure, and anchoring agent cooperates with groove and prevents lower spiral spike from rotating around its own axis and vertical movement, thereby enhanced the anti-rotation anti-pulling performance of lower spiral spike, avoid the lower spiral spike loosening or autorotation when dismounting the rail fastener.

Description

Technical Field

[0001] This utility model relates to a spiral rail spike, specifically, to an anti-rotation and anti-pull-out spiral rail spike. Background Technology

[0002] Rail fasteners are a combination of components used to fix rails to railway sleepers (such as concrete or wooden sleepers). Their main functions include: firmly locking the rail position (preventing longitudinal creep and lateral displacement), maintaining accurate track gauge (ensuring wheel-rail matching), transferring train loads to the track foundation, and buffering impact vibrations, reducing noise, and protecting the track structure through elastic elements (such as rubber pads or spring clips). They are key components for ensuring safe and smooth train operation and stable track geometry.

[0003] Reference Figure 5 In the prior art, the rail body 7 is mounted on a rubber pad 6 laid on a sleeper 5. Holes are provided on both sides of the rail body 7 on the sleeper 5. The rail fasteners that fit the rail body 7 are usually composed of a spiral spike, a baffle seat 52, a gauge baffle 53, an elastic clip 56, a nut 55, and a washer 54. Among them, the elastic clip 56 is a W-shaped or E-shaped structure made of bent metal, and it has a curved channel formed by bending metal. The gauge baffle 53 has a pre-cut channel large enough to accommodate the spiral spike, and the width of the channel is smaller than the outer diameter of the washer 54.

[0004] During the installation of the rail fastener, the operator first pre-fills the hole with anchoring agent 51. Then, the baffle seat 52 is placed at the edge of the recess on the sleeper 5, so that its position corresponds to the anchoring agent 51. The rail body 7 is placed in the middle of the recess, with a gap reserved between the baffle seat 52 and the rail body 7. Next, one end of the gauge baffle 53 is placed on the baffle seat 52, and the other end contacts the upper surface of the rail base of the I-shaped base plate of the rail body 7. Then, the elastic clip 56 is placed on the gauge baffle 53, so that its two ends contact the upper side wall of the gauge baffle 53 near the edge. Finally, the operator puts the washer 54 on the spiral spike, and passes the lower end of the spiral spike through the curved channel of the elastic clip 56, the channel on the gauge baffle 53, and the gap between the baffle seat 52 and the rail body 7 in sequence, and screws it into the pre-filled anchoring agent 51 in the hole of the sleeper 5. After the anchoring agent 51 has solidified, screw the nut 55 into the threaded groove of the spiral spike, causing it to move downward along the axis. The downward-moving nut 55 presses the gauge baffle 53 and the elastic strip 56 downward through the washer 54, thereby pressing and fixing the bottom of the rail body 7 and the rubber pad 6 onto the bolster 5.

[0005] However, in practical applications, rail fasteners need to be installed and removed multiple times. Due to the characteristics of the threaded pair, the helical rail spikes may sometimes loosen or rotate. The reasons for this are twofold: firstly, the threaded pair will wear down during repeated installation and removal, leading to a decrease in preload; secondly, the repeated screwing in and out of the helical rail spikes and the vibration of train operation will damage the anchoring agent in the hole, weakening its gripping force. The combined effect of these two factors can easily lead to the helical rail spikes loosening. Once this happens, a gap will be created between the helical rail spike and the anchoring agent 51, causing a decrease in the clamping force of the rail fastener system, which seriously affects traffic safety. Utility Model Content

[0006] The purpose of this utility model is to provide an anti-rotation and anti-pull-out spiral rail spike to solve the problems mentioned in the background art: when rail fasteners are installed and removed multiple times, the spiral rail spike may sometimes loosen or rotate, causing the fastening force of the rail fastener system to decrease, which seriously affects traffic safety.

[0007] To address the above problems, the present invention aims to provide an anti-rotation and anti-pull-out spiral rail spike, comprising a lower spiral rail spike with three grooves arranged in a ring array on its circumferential sidewall. After the lower spiral rail spike is anchored in the anchoring agent, the grooves and the anchoring agent are fitted together to form an integrated structure. An upper spiral rail spike is coaxially arranged at the upper end of the lower spiral rail spike. A locking mechanism is provided between the upper and lower spiral rail spikes to fix the lower and upper spiral rail spikes together. When the rail fastener is installed on the rail body, a second nut is threaded onto the upper spiral rail spike.

[0008] As a further improvement to this technical solution, the top of the lower spiral rail spike is provided with a groove, and the bottom of the upper spiral rail spike is fixedly provided with a protrusion. The lower side wall and the two side walls of the protrusion are in contact with the inner wall of the groove, and the protrusion and the two sides of the groove are provided with interconnected through grooves, wherein the through groove on the groove extends to the outer circumference of the lower spiral rail spike.

[0009] As a further improvement to this technical solution, the locking mechanism includes a bolt that is slidably disposed inside three through slots. The tail end of the bolt is threadedly connected to a first nut. The outer circumference of the lower spiral spike is provided with an embedded groove at the position corresponding to the two through slots. The head of the first nut and the bolt are respectively accommodated in the two embedded grooves.

[0010] As a further improvement to this technical solution, the shape of the recessed groove that accommodates the first nut is adapted to the first nut, and the recessed groove restricts the first nut from rotating about the bolt axis.

[0011] As a further improvement to this technical solution, a convex ring is coaxially fixed on the lower spiral rail spike. After the lower spiral rail spike is anchored in the anchoring agent, the lower sidewall of the convex ring contacts the upper sidewall of the soft pillow.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. This anti-rotation and anti-pull-out spiral rail spike, after the lower spiral rail spike is screwed into the pre-filled holes in the bolster by rotation, the uncured anchoring agent flows and fills the groove. After the anchoring agent solidifies, the groove and the anchoring agent fit together to form an integrated structure. The anchoring agent and the groove work together to prevent the lower spiral rail spike from rotating around its own axis and moving vertically, thereby enhancing the anti-rotation and anti-pull-out performance of the lower spiral rail spike, preventing the lower spiral rail spike from loosening or rotating during the installation and removal of rail fasteners, and ensuring that the fastening force of the rail fasteners does not decrease.

[0014] 2. When the threads on the upper spiral spike wear due to repeated disassembly and reassembly of the second nut, the operator first unscrews the bolt from the inside of the first nut, then pulls the bolt out of the three through slots, and then removes the protrusion from the groove. This allows the upper and lower spiral spikes to be disassembled and separated. After that, a new upper spiral spike can be installed. This ensures that the second nut and the spiral spike can maintain a normal threaded connection for a long time, thereby ensuring the normal use of the rail fastener. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is an exploded view of the present invention;

[0017] Figure 3 This is one of the cross-sectional views of this utility model;

[0018] Figure 4 This is a second sectional view of the present invention;

[0019] Figure 5 This is a schematic diagram of the assembly structure of the overall device of this utility model in the fastener system.

[0020] The meanings of the labels in the diagram are as follows:

[0021] 1. Lower spiral rail spike; 11. Groove; 12. Raised ring; 13. Recess; 14. Embedded groove;

[0022] 2. Upper spiral rail spike; 21. Protrusion;

[0023] 3. Locking mechanism; 31. Bolt; 32. First nut;

[0024] 4. Through groove;

[0025] 5. Soft pillow; 51. Anchoring agent; 52. Baffle seat; 53. Gauge baffle; 54. Washer; 55. Second nut; 56. Spring clip;

[0026] 6. Rubber pad; 7. Rail body. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Example 1

[0029] Please see Figure 1 , Figure 4 and Figure 5 As shown, the purpose of this embodiment is to provide an anti-rotation and anti-pull-out spiral rail spike, including a lower spiral rail spike 1. The circumferential sidewall of the lower spiral rail spike 1 has three grooves 11 arranged in an annular array. The grooves 11 are located in the threaded portion of the lower spiral rail spike 1. A convex ring 12 is coaxially fixed on the lower spiral rail spike 1. When the lower spiral rail spike 1 is screwed into the hole of the soft pillow 5 pre-filled with anchoring agent 51 by rotation, the lower spiral rail spike 1 is anchored in the anchoring agent 51 after the lower sidewall of the convex ring 12 contacts the upper sidewall of the soft pillow 5. At this time, the grooves 11 are completely located inside the anchoring agent 51. In the uncured state of the anchoring agent 51, it can flow and fill into the grooves 11. After the anchoring agent 51 is cured, the grooves 11 and the anchoring agent 51 are fitted together to form an integrated structure. The anchoring agent 51 and the grooves 11 cooperate to prevent the lower spiral rail spike 1 from rotating around its own axis and moving vertically, thereby enhancing the anti-rotation and anti-pull-out performance of the lower spiral rail spike 1.

[0030] The groove 11 has a width of 5-6 mm, a depth of 3-4 mm, and a length of 80-90 mm. Its structural design ensures that the lower spiral rail spike 1 can remain firmly anchored no matter how many times the rail fastener is disassembled and reassembled. From a process performance perspective, this improvement only requires processing three grooves 11 on the lower spiral rail spike 1, which is simple and easy to process. From a performance perspective, the lower spiral rail spike 1 after processing the grooves 11 has enhanced its own strength and anti-rotation and anti-pull-out performance after anchoring without affecting its original performance.

[0031] An upper spiral spike 2 is coaxially arranged at the upper end of the lower spiral spike 1. A locking mechanism 3 is provided between the upper spiral spike 2 and the lower spiral spike 1. The locking mechanism 3 is used to fix the lower spiral spike 1 and the upper spiral spike 2 together, so that the lower spiral spike 1 and the upper spiral spike 2 form a complete spiral spike. When the rail fastener is installed on the rail body 7, the second nut 55 is threaded onto the upper spiral spike 2. The operator rotates the second nut 55 to move it downward along the axis of the upper spiral spike 2. The downwardly moving second nut 55 presses the gauge baffle 53 and the elastic strip 56 downward through the washer 54, so that the gauge baffle 53 presses and fixes the bottom of the rail body 7 and the rubber pad 6 onto the soft pillow 5.

[0032] A groove 13 is provided at the top of the lower spiral rail spike 1, and a protrusion 21 is fixedly provided at the bottom of the upper spiral rail spike 2. The lower side wall and the two side walls of the protrusion 21 are in contact with the inner wall of the groove 13. A through groove 4 is provided on the protrusion 21 and on both sides of the groove 13. The through groove 4 on the groove 13 extends to the outer circumference of the lower spiral rail spike 1. The structure of the groove 13 restricts the vertical downward movement of the protrusion 21 and its movement in a horizontal direction.

[0033] The structure of locking mechanism 3 is described in detail below, with reference to... Figure 2 and Figure 3 The locking mechanism 3 includes a bolt 31 that is slidably disposed inside the three through slots 4. The tail end of the bolt 31 is threadedly connected to a first nut 32. The outer circumference of the lower spiral spike 1 is provided with an inner groove 14 at the position corresponding to the two through slots 4. The heads of the first nut 32 and the bolt 31 are respectively accommodated in the two inner grooves 14. The cooperation between the heads of the first nut 32 and the bolt 31 and the inner grooves 14 restricts the movement of the bolt 31 in the through slots 4, so that its rod body is stably kept inside the three through slots 4. The presence of the bolt 31 prevents the protrusion 21 from moving horizontally (in the direction not restricted by the groove 13) and upward within the groove 13, thereby fixing the upper spiral spike 2 to the upper end of the lower spiral spike 1.

[0034] By setting the embedded groove 14, the bolt 31 and the first nut 32 can be prevented from significantly increasing the overall width of the spiral rail spike, thereby ensuring that the overall width of the spiral rail spike is less than the width of the channel on the gauge baffle 53 and the width of the curved channel of the elastic bar 56. In this way, the operator can easily pass the device through the curved channel of the elastic bar 56 and the channel on the gauge baffle 53 in sequence to achieve the matching installation with the rail fastener. The shape of the embedded groove 14 that accommodates the first nut 32 is adapted to it. This design restricts the first nut 32 from rotating around the axis of the bolt 31, making it easy for the operator to screw the tail end of the first nut 32 into the bolt 31.

[0035] When using this device, the operator first passes the lower end of the lower spiral spike 1 through the curved channel of the elastic clip 56 and the channel on the gauge baffle 53 in sequence. Then, it passes through the gap between the baffle seat 52 and the rail body 7 and screws it into the hole on the bolster 5 that has been pre-filled with anchoring agent 51, until the lower side wall of the convex ring 12 contacts the upper side wall of the bolster 5. At this time, the groove 11 is completely inside the anchoring agent 51, and the uncured anchoring agent 51 flows and fills the groove 11. After solidification, the groove 11 and the anchoring agent 51 are integrated to form an integral structure. This structure can effectively prevent the lower spiral spike 1 from rotating around its own axis and from moving vertically. Then, the operator screws the second nut 55 into the threaded groove of the upper spiral spike 2, causing it to move downward along the axis. The downward-moving second nut 55 presses the gauge baffle 53 and the elastic strip 56 downward through the washer 54, thereby pressing the bottom of the rail body 7 and the rubber pad 6 and fixing them to the soft pillow 5.

[0036] When it is necessary to disassemble the rail fastener, the operator unscrews the second nut 55 from the upper spiral spike 2, and then removes the elastic clip 56 and the gauge baffle 53 from the upper spiral spike 2 in sequence to complete the disassembly.

[0037] When the threads on the upper spiral spike 2 wear out, the operator first unscrews the bolt 31 from inside the first nut 32, then pulls the bolt 31 out of the three through slots 4, and then removes the protrusion 21 from the groove 13. This allows the upper spiral spike 2 to be disassembled and separated from the lower spiral spike 1. Then, a new upper spiral spike 2 can be installed. This design ensures that the second nut 55 and the spiral spike can maintain a normal threaded connection for a long time, thereby ensuring the normal use of the rail fastener.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A type of anti-rotation and anti-pull-out spiral rail spike, comprising a lower spiral rail spike (1), characterized in that: The lower spiral spike (1) has three grooves (11) arranged in an annular array on its circumferential sidewall. After the lower spiral spike (1) is anchored in the anchoring agent (51), the grooves (11) and the anchoring agent (51) are fitted together to form an integrated structure. The upper spiral spike (2) is coaxially arranged at the upper end of the lower spiral spike (1). A locking mechanism (3) is provided between the upper spiral spike (2) and the lower spiral spike (1). The locking mechanism (3) is used to fix the lower spiral spike (1) and the upper spiral spike (2) together. When the rail fastener is installed on the rail body (7), the second nut (55) is threaded onto the upper spiral spike (2).

2. The anti-rotation and anti-pull-out spiral rail spike according to claim 1, characterized in that: The top of the lower spiral rail spike (1) is provided with a groove (13), and the bottom of the upper spiral rail spike (2) is fixedly provided with a protrusion (21). The lower side wall and the two side walls of the protrusion (21) are in contact with the inner wall of the groove (13), and the protrusion (21) and the two sides of the groove (13) are provided with interconnected through grooves (4), wherein the through groove (4) on the groove (13) extends to the outer circumference of the lower spiral rail spike (1).

3. The anti-rotation and anti-pull-out spiral rail spike according to claim 2, characterized in that: The locking mechanism (3) includes a bolt (31) that is slidably disposed inside three through slots (4). The tail end of the bolt (31) is threaded with a first nut (32). The outer circumference of the lower spiral spike (1) is provided with an embedded groove (14) at the position corresponding to the two through slots (4). The heads of the first nut (32) and the bolt (31) are respectively accommodated in the two embedded grooves (14).

4. The anti-rotation and anti-pull-out spiral rail spike according to claim 3, characterized in that: The inner groove (14) that accommodates the first nut (32) is shaped to fit the first nut (32) and restricts the first nut (32) from rotating about the axis of the bolt (31).

5. The anti-rotation and anti-pull-out spiral rail spike according to claim 1, characterized in that: A convex ring (12) is coaxially fixed on the lower spiral spike (1). After the lower spiral spike (1) is anchored in the anchoring agent (51), the lower side wall of the convex ring (12) contacts the upper side wall of the soft pillow (5).

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