A matched WJ-8 compression type separable damping fastener

Abstract

The utility model relates to rail transit technical field, specifically disclose a kind of supporting WJ-8 compression type separable type damping fastener, the damping fastener body includes by sequentially arranged from bottom to top insulating coupling backing plate, lower iron backing plate, intermediate elastic backing plate, upper iron backing plate, each component is connected by fastener fastener.The upper iron backing plate is provided with rail slot, and rail height adjusting backing plate, rail elastic backing plate and steel rail are sequentially placed in it;Upper iron backing plate is provided with elastic strip seat and elastic strip, rail pitch block is arranged between the rail bottom and rail slot, and elastic strip is placed on elastic strip seat and rail pitch block.Insulating coupling backing plate both sides are provided with rail pitch stopper, and lower iron backing plate is hinged connection.It is achieved damping through multilayer elastic structure, and rail pitch stopper enhances lateral stability, and separable structure is convenient for installation and maintenance, and it is suitable for railway track system, and can effectively improve track stability and damping effect.

Description

Technical Field

[0001] This utility model relates to the field of rail transit technology, specifically to a matching WJ-8 compression-type detachable vibration damping fastener. Background Technology

[0002] In the field of rail transit, fasteners, as core components connecting rails and sleepers, directly affect the stability of the track structure, the safety of train operation, and passenger comfort. WJ-8 fasteners, widely used in my country's high-speed railways as a non-separable shoulder fastener, play a crucial role in the track system. However, due to their structural characteristics, they present significant drawbacks in daily maintenance: Because of their integrated structural design, replacing parts requires first removing the spiral spikes. This disassembly and reassembly process easily causes wear or even damage to the internal threads of the embedded sleeves in ballastless railways. Once the embedded sleeves are damaged, repair and replacement are not only complex but also incur high costs.

[0003] Meanwhile, with the rapid development of modern life, special environments such as hospitals, schools, and residential areas have placed more stringent demands on noise pollution generated by railway transportation. The vibration reduction and noise reduction performance of traditional WJ-8 fasteners is no longer sufficient to meet the needs of such scenarios. Therefore, developing a new type of fastener that can adapt to WJ-8 interface conditions, solve the problem of easy damage to pre-embedded sleeves during maintenance, and also has excellent vibration reduction effects has become an urgent need in the rail transit field, and is of great significance for reducing maintenance costs and improving the environmental performance of tracks. Utility Model Content

[0004] The purpose of this utility model is to provide a matching WJ-8 compression-type separable vibration damping fastener to solve the problems mentioned in the background art. This design achieves vibration damping through a multi-layer elastic structure, the gauge block enhances lateral stability, and the separable structure facilitates installation and maintenance. It is suitable for railway track systems and can effectively improve track stability and vibration damping effect.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a matching WJ-8 compression-type detachable vibration damping fastener, comprising a vibration damping fastener body, the vibration damping fastener body comprising an insulating coupling pad, a lower iron pad, an intermediate elastic pad, and an upper iron pad arranged sequentially from bottom to top, the insulating coupling pad, the lower iron pad, the intermediate elastic pad, and the upper iron pad being connected by fastener fasteners; a rail bearing groove is provided on the upper iron pad, and a rail height adjustment pad, a rail elastic pad, and a rail are placed sequentially in the rail bearing groove; a spring clip seat and a spring clip are provided on the upper iron pad, a gauge block is provided between the bottom of the rail and the rail bearing groove, and the spring clip is provided on the spring clip seat and the gauge block of the upper iron pad; gauge blocks that engage with the lower iron pad are provided on both sides of the insulating coupling pad.

[0006] To further optimize this utility model, the following technical solutions may be preferred: Preferably, the fastener is a double-ended stud, which includes an upper screw, a non-circular shoulder, a lower screw, and a non-circular end. The upper screw of the double-ended stud engages with an anti-loosening nut to press the spring clip. The non-circular shoulder is located in the middle of the double-ended stud and is used to apply installation torque. The lower screw of the double-ended stud is screwed into a pre-embedded sleeve to fix the fastener. The non-circular end is located at the top of the double-ended stud for disassembly assistance.

[0007] Preferably, the upper end of the double-ended stud is provided with a flat washer and a spring-loaded anti-loosening nut, and the lower end of the double-ended stud is connected to a pre-embedded sleeve.

[0008] Preferably, the bottom inner side of the gauge block is provided with an anti-disengagement structure that cooperates with the fastener pad plate. The anti-disengagement structure is a protrusion, and the lower pad plate is provided with a groove that cooperates with the protrusion.

[0009] Preferably, the inner top of the gauge block is provided with a guide slope to facilitate the installation of vibration damping fasteners, and the guide slope is in close contact with the two wings of the sleeper or insulating coupling pad.

[0010] Preferably, the outer side of the gauge block is also provided with a cavity matching surface that matches the contour of the sleeper bearing groove cavity.

[0011] Preferably, the upper iron pad is provided with an edge surface that mates with the vertical surface of the gauge block, and the bottom inner side of the gauge block is provided with a vertical surface that mates with the edge surface of the upper iron pad.

[0012] Preferably, the insulating coupling pad is provided in different models according to the height adjustment of the fastener, and the insulating coupling pad is provided with side wings on both sides to fill the gap between the gauge block and the sleeper after the fastener is adjusted, and the size of the side wings is adjusted according to different height adjustment amounts.

[0013] Preferably, the lower iron pad is provided with a hollow frame structure for placing the intermediate elastic pad, and the hollow frame structure is surrounded by a bevel and a skirt that cooperate with the lower elastic pad to prevent the intermediate elastic pad from falling off.

[0014] Compared with the prior art, the beneficial effects of this utility model are: (1) Excellent vibration reduction effect: The multi-layer elastic structure formed by the intermediate elastic pad and the rail elastic pad can effectively absorb the vibration generated by the train operation, significantly reduce noise pollution, and meet the strict requirements for noise reduction in special environments such as hospitals, schools, and residential areas.

[0015] (2) Convenient installation and maintenance: The detachable structure design is adopted, and each component is connected by fasteners such as double-ended studs. The disassembly and assembly process does not require the removal of the spiral track spikes, avoiding wear and damage to the internal threads of the pre-embedded sleeve, and greatly reducing maintenance and replacement costs. The non-circular shoulder and end design of the double-ended studs facilitates the application of installation torque and assists in disassembly, further improving operating efficiency.

[0016] (3) Strong lateral stability: The gauge block is engaged with the lower iron pad through the anti-detachment structure. Its cavity matching surface is in contact with the rail bearing groove of the sleeper, and the edge surface of the upper iron pad is in contact with the vertical surface of the block. The combined effect of multiple structures effectively restricts the lateral displacement of the components, ensures the gauge accuracy, and enhances the stability of the track structure.

[0017] (4) Wide applicability: The insulating coupling pad is available in different models according to the height adjustment. The side wings can fill the gap between the stop block and the sleeper after the height adjustment, meeting the requirements of different track heights. The hollow frame structure and the design of the inclined surface and skirt of the lower iron pad can reduce the overall assembly height and prevent the middle elastic pad from falling off, making it suitable for various railway track scenarios. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the WJ-8 compression-type detachable vibration damping fastener used in Example 1; Figure 2 This is a schematic diagram of the assembly state of the vibration damping fastener in Example 1; Figure 3 This is a schematic diagram of the double-ended stud in Example 1; Figure 4 This is a schematic diagram of the insulating coupling pad in Example 1; Figure 5 This is a schematic diagram of the inner structure of the gauge block in Example 1; Figure 6 This is a schematic diagram of the outer structure of the gauge block in Example 1; Figure 7 This is a schematic diagram of the lower iron pad in Example 1; Figure 8 This is a schematic diagram of the structure of the intermediate elastic pad in Example 1; Figure 9 This is a schematic diagram of the upper iron pad in Example 1.

[0019] In the diagram: 1. Rail; 2. Upper rail pad; 3. Lower rail pad; 4. Intermediate elastic pad; 5. Under-rail elastic pad; 6. Insulating coupling pad; 7. Cover plate; 8. Track gauge block; 9. Under-rail height adjustment pad; 10. Insulating track gauge block; 11. Double-ended stud; 12. Spring clip; 13. Flat washer; 14. Spring clip anti-loosening nut; 15. Anti-loosening washer; 16. Embedded sleeve; 17. Sleeper; 101. Upper screw; 102. Non-circular shoulder; 103. Lower screw; 104. Non-circular end; 201. Edge surface; 202. Rail groove; 301. Card slot; 302. Hollowed-out frame structure; 303. Beveled surface; 304. Skirt; 601. Flanking position; 801. Anti-detachment structure; 802. Guide slope; 803. Vertical surface; 804. Cavity matching surface. Detailed Implementation

[0020] 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.

[0021] Example 1: like Figure 1-9 As shown, this utility model is a matching WJ-8 compression type separable vibration damping fastener, which is composed of rail 1, upper rail pad 2, lower rail pad 3, intermediate elastic pad 4, rail under elastic pad 5, insulating coupling pad 6, cover plate 7, track gauge block 8, rail under height adjustment pad 9, insulating track gauge block 10, double-headed stud 11, spring strip 12, flat washer 13, spring strip anti-loosening nut 14, anti-loosening washer 15, pre-embedded sleeve 16 and other parts.

[0022] The insulating coupling pad 6 is laid on the sleeper. It is available in different models depending on the height adjustment of the fastener. It also has side wings 601 on both sides to fill the gap between the gauge block and the sleeper after the fastener is adjusted. The size of the side wings is adjusted according to different height adjustments.

[0023] The gauge blocks 8 are installed on both sides of the insulating coupling pad 6. Each set of fasteners uses two gauge blocks, and their inclined surfaces are in close contact with the sleeper or the two wings of the insulating coupling pad. The gauge blocks 8 are designed with an anti-disengagement structure 801 that cooperates with the fastener iron pad, and this anti-disengagement structure is a protrusion; they are also designed with a vertical surface 803 that cooperates with the edge surface of the upper iron pad 2 to increase the lateral stability of the fastener; they are designed with a cavity matching surface 804 that is consistent with the contour of the sleeper bearing groove cavity; and they are designed with a guide inclined surface 802 to facilitate the installation of the fastener.

[0024] The lower iron pad 3 is installed on the insulating coupling pad 6. The lower iron pad 3 is designed with a groove 301 that matches the protrusion of the gauge block. The anti-dislodgement structure of the gauge block is located in the groove. The lower iron pad is designed with a hollow frame structure 302 where the middle elastic pad is placed, so that the middle elastic pad is embedded in the lower iron pad, which reduces the overall assembly height. The hollow frame of the lower iron pad is designed with a slope 303 and a skirt 304 that match the middle elastic pad to prevent the middle elastic pad from falling off.

[0025] The intermediate elastic pad 4 is installed inside the hollow structure of the lower iron pad, and the upper iron pad 2 is installed on the intermediate elastic pad. The upper iron pad 2 is designed with an edge surface 201 that matches the vertical surface of the gauge block to increase the lateral stability of the fastener. The cover plate is set on the upper iron pad, and the anti-loosening washer is set on the cover plate.

[0026] The rail height adjustment pad and the rail elastic pad are installed in the rail bearing groove 202 of the upper rail pad. The rail is set on the rail elastic pad. The insulating gauge block is installed between the bottom of the rail and the rail bearing groove. The elastic bar is installed on the elastic bar seat of the upper rail pad and the insulating gauge block. The flat washer and the elastic bar anti-loosening nut are installed at the threaded end of the double-ended stud.

[0027] Each set of this fastener uses two double-ended studs 11. The double-ended studs are designed with an upper screw 101 that engages with the anti-loosening nut to press the spring strip; a non-circular shoulder 102 in the middle part for applying installation torque; a lower screw 103 at the lower end for screwing into the pre-embedded sleeve to fix the fastener; and a non-circular end 104 at the top for disassembly assistance. The shape of the lower screw can be adjusted according to the internal thread of different models of pre-embedded sleeves; the shape of the non-circular shoulder and the non-circular end can be adjusted according to different tools used; the lower end of the double-ended stud is connected to the pre-embedded sleeve.

[0028] The installation steps of this utility model are as follows: Step 1: Place the insulating coupling pad 6 on the sleeper 17; Step 2: Place gauge blocks 8 on both sides of the insulating coupling pad 6; Step 3: Place the lower iron pad 3 so that the lower iron pad limiting groove is pressed against the gauge block limiting boss; Step 4: Place the raised side of the middle elastic pad 4 into the hollow frame structure of the lower iron pad; Step 5: Place the upper iron pad 2; Step 6: Place the cover plate 7 and the anti-loosening washer in sequence at the double-ended stud mounting holes of the iron plate; Step 7: After applying grease to the lower end of the double-ended stud 11, insert it into the anti-loosening washer 15, cover plate, and lower iron plate stud holes in sequence, and screw it into the pre-embedded sleeve 16. The screwing depth must meet the design requirements to ensure a stable connection. Step 8: As needed, place the rail height adjustment pad 9 and the rail elastic pad 5 in the rail groove of the upper iron pad 2 in sequence; Step 9: Place rail 1 so that rail 1 is placed on the elastic pad 5 under the rail; Step 10: Place an insulating gauge block 10 between the upper iron pad rail groove and the bottom of the rail; Step 11: Place the spring clip 12 on the spring clip seat of the upper iron plate; Step 12: Place the flat washer 13 onto the upper end of the stud; Step 13: Screw the spring clip anti-loosening nut 14 into the upper screw of the double-ended stud and tighten it to the designed position. The tightening torque of the spring clip anti-loosening nut must meet the design standard to ensure that the clamping force of the spring clip on the rail reaches the specified value and complete the fastener assembly.

[0029] The maintenance method of this utility model is as follows: Steps for replacing the gauge block: Use a general-purpose tool to remove the two spring clip anti-loosening nuts and flat washers. During removal, you can use a tool with the force-bearing structure at the top of the double-ended stud to assist in fixing it; remove the two spring clips and gauge block; put in the gauge block to be replaced; put in the other parts in sequence according to the installation method; replacement is complete.

[0030] Steps for replacing gauge blocks: Use general-purpose tools to remove the two spring clip anti-loosening nuts and flat washers; remove the two spring clips and gauge blocks; raise the rail; use general-purpose tools to remove the two double-ended studs and remove the cover plates and anti-loosening washers; remove the rail under-rail elastic pad, rail under-rail height adjustment pad, upper rail pad, middle elastic pad, and lower rail pad; remove the gauge blocks and insert the gauge blocks to be replaced; insert the other parts in sequence according to the installation method; replacement complete.

[0031] Steps for adjusting the rail height: Use general-purpose tools to remove the two spring clip anti-loosening nuts and flat washers; remove the two spring clips and gauge blocks; use general-purpose tools to remove the two double-ended studs and remove the cover plates and anti-loosening washers; raise the rail; remove the under-rail elastic pad, under-rail height adjustment pad, upper rail pad, middle elastic pad, lower rail pad, and gauge block; remove the insulating coupling pad and insert the insulating coupling pad that needs to be replaced; insert the other parts in sequence according to the installation method; replacement complete.

[0032] Rail height adjustment procedure: Use a general tool to remove the two spring clip anti-loosening nuts and flat washers. During removal, tools can be used in conjunction with the load-bearing structure at the top of the double-ended stud to assist in fixation; remove the two spring clips and gauge blocks; lift the rail; remove the rail under-rail elastic pad and insert the rail height adjustment pad as needed; insert other parts in sequence according to the installation method; replacement complete.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A matching WJ-8 compression-type detachable vibration damping fastener, comprising a vibration damping fastener body, characterized in that: The vibration damping fastener body includes an insulating coupling pad, a lower iron pad, an intermediate elastic pad, and an upper iron pad arranged sequentially from bottom to top. The insulating coupling pad, lower iron pad, intermediate elastic pad, and upper iron pad are connected by fasteners. The upper iron pad has a rail-bearing groove, in which a rail-lowering height adjustment pad, a rail-lower elastic pad, and a rail are placed sequentially. The upper iron pad is provided with a spring clip seat and a spring clip. A gauge block is provided between the bottom of the rail and the rail-bearing groove. The spring clip is set on the spring clip seat and gauge block of the upper iron pad. Gauge blocks that engage with the lower iron pad are provided on both sides of the insulating coupling pad.

2. The matching WJ-8 compression-type detachable vibration damping fastener according to claim 1, characterized in that: The fastener is a double-ended stud, which includes an upper screw, a non-circular shoulder, a lower screw, and a non-circular end. The upper screw of the double-ended stud engages with an anti-loosening nut to press the spring clip. The non-circular shoulder is located in the middle of the double-ended stud and is used to apply installation torque. The lower screw of the double-ended stud is screwed into a pre-embedded sleeve to fix the fastener. The non-circular end is located at the top of the double-ended stud for disassembly assistance.

3. The matching WJ-8 compression-type detachable vibration damping fastener according to claim 2, characterized in that: The upper threaded portion of the double-ended stud is equipped with a flat washer and a spring-loaded anti-loosening nut, and the lower end of the double-ended stud is connected to a pre-embedded sleeve.

4. The matching WJ-8 compression-type detachable vibration damping fastener according to claim 1, characterized in that: The bottom inner side of the gauge block is provided with an anti-disengagement structure that cooperates with the fastener pad. The anti-disengagement structure is a protrusion, and the lower pad is provided with a groove that cooperates with the protrusion.

5. A matching WJ-8 compression-type detachable vibration damping fastener according to claim 4, characterized in that: The inner top of the gauge block is provided with a guide slope to facilitate the installation of vibration damping fasteners, and the guide slope is in close contact with the two wings of the sleeper or insulating coupling pad.

6. A matching WJ-8 compression-type detachable vibration damping fastener according to claim 5, characterized in that: The outer side of the gauge block is also provided with a cavity matching surface that matches the contour of the sleeper bearing groove cavity.

7. A matching WJ-8 compression-type detachable vibration damping fastener according to claim 6, characterized in that: The upper iron pad is provided with an edge surface that mates with the vertical surface of the gauge block, and the bottom inner side of the gauge block is provided with a vertical surface that mates with the edge surface of the upper iron pad.

8. A matching WJ-8 compression-type detachable vibration damping fastener according to claim 1, characterized in that: The insulating coupling pad is available in different models depending on the height adjustment of the fastener. The insulating coupling pad has side wings on both sides to fill the gap between the gauge block and the sleeper after the fastener is adjusted, and the size of the side wings is adjusted according to different height adjustments.

9. A matching WJ-8 compression-type detachable vibration damping fastener according to claim 1, characterized in that: The lower iron pad is provided with a hollow frame structure for placing the middle elastic pad. The hollow frame structure is surrounded by inclined surfaces and skirts that cooperate with the lower elastic pad to prevent the middle elastic pad from falling off.

Images