A fastener for inhibiting rail corrugation of a small-radius floating slab track of a subway

Abstract

The utility model discloses a kind of fastener for inhibiting subway small radius floating slab track rail corrugation, including iron fender plate, the iron fender plate is provided with elastic strip pedestal and middle limb positioning block, two parallel elastic strip pedestals are fixed with special-shaped elastic strip, the middle limb positioning block is located between two elastic strip pedestals, the middle limb positioning block, elastic strip pedestal, special-shaped elastic strip are fixed to composite track gauge block jointly.The utility model has adopted special-shaped elastic strip to overcome the drawbacks of elastic strip used by conventional fastener, double-layer rubber structure design is adopted to elastic pad under iron fender plate, track system resonance is inhibited, the generation and development of steel rail corrugation are effectively inhibited, while maintaining floating slab damping performance, reduce fastener elastic strip fracture risk.The utility model is adjusted and fixed to composite track gauge block by special-shaped elastic strip, elastic strip pedestal, middle limb positioning block in multiple-point mode, to realize the small track gauge adjustment and stiffness adjustment of fastener.The utility model is convenient to use, easy to promote.

Description

Technical Field

[0001] This utility model belongs to the field of rail transit track technology, specifically relating to a composite fastener for suppressing rail corrugation in subway small-radius floating slab tracks. Background Technology

[0002] The complex wheel-rail dynamic interaction in small-radius curves of subway floating slab tracks easily leads to rail corrugation, causing fastener breakage and increased vibration and noise. Existing technologies often employ single measures, such as rail grinding or adjusting fastener stiffness, but these methods suffer from rapid corrugation recurrence and reduced vibration reduction performance. Chinese patent CN210031357U discloses a railway fastener structure that can reduce wear. The patented clamp replaces the iron pad surface in contact with the gauge baffle, and the friction coefficient between the two is smaller than before, resulting in less wear. This minimizes the impact of wear on the gauge expansion. However, the problem of frequent re-tightening and maintenance still exists after operation due to vibration. Summary of the Invention

[0003] This utility model is proposed to solve the problems existing in the prior art, and its purpose is to provide a fastener for suppressing the corrugation of the rails of small-radius floating slab tracks in subways.

[0004] The technical solution of this utility model is: a fastener for suppressing rail corrugation of small-radius floating slab track in subway, including an iron pad plate, on which a spring clip base and a middle limb positioning block are provided, and an irregularly shaped spring clip is fixed in two parallel spring clip bases, and the middle limb positioning block is located between the two spring clip bases. The middle limb positioning block, the spring clip base, and the irregularly shaped spring clip together fix the composite gauge block.

[0005] Furthermore, the composite gauge block includes a vertical block, the upper end of which forms an integrally formed inclined block, and the vertical block and the inclined block are rounded to form a gauge facing groove, which corresponds to the rail, and the back of the vertical block forms an outwardly protruding gauge block mounting boss.

[0006] Furthermore, the middle limb positioning block laterally fixes the composite gauge block, and a slot is formed in the middle limb positioning block to accommodate the gauge block mounting boss on the back of the composite gauge block.

[0007] Furthermore, the elastic base adjusts and fixes the composite gauge block by tilting and pressing it down. The side of the elastic base facing the composite gauge block forms an arc-shaped mating groove, which is adapted to the arc-shaped outer contour of the composite gauge block.

[0008] Furthermore, an inclined mounting groove is formed inside the elastic bar base, which is used to install and fix the irregularly shaped elastic bar.

[0009] Furthermore, the upper end of the elastic bar base forms an inclined anchoring hole, which is connected to the inclined mounting groove, and the bolt in the inclined anchoring hole can press down and tilt to hold the composite gauge block.

[0010] Furthermore, the irregularly shaped elastic bar presses down on the inclined block of the composite gauge block, and the middle part of the irregularly shaped elastic bar forms a U-shaped part, which presses down on the upper end of the inclined block.

[0011] Furthermore, an inner convex locking position is formed in the inclined mounting groove of the elastic bar base, and an inner concave locking groove is formed in the mounting section of the irregular elastic bar. The mounting section of the irregular elastic bar is inserted into the inclined mounting groove, and the inner concave locking groove is engaged in the inner convex locking position.

[0012] Furthermore, the upper end of the iron pad is formed with iron pad serrations, and the iron pad serrations are provided with adjustable buckles for fixing and adjusting.

[0013] The beneficial effects of this utility model are as follows: This utility model uses an irregularly shaped elastic bar to overcome the shortcomings of the elastic bars used in conventional fasteners. The elastic pad under the iron pad plate adopts a double-layer rubber structure design to suppress the resonance of the track system, effectively suppress the generation and development of rail corrugation, while maintaining the vibration reduction performance of the floating plate and reducing the risk of fastener elastic bar breakage.

[0014] This utility model uses an irregularly shaped elastic bar, an elastic bar base, and a middle limb positioning block to adjust and fix the composite gauge block at multiple points, thereby realizing the adjustment of the small gauge and stiffness of the fastener.

[0015] This utility model achieves the adjustment and fixation of the iron pad plate through the sawtooth of the iron pad plate, the adjustable gap buckle plate, and the pre-embedded sleeve, while also realizing the large gauge adjustment of the fastener. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a plan view of the steel spring floating plate in this utility model; Figure 3 This is a schematic diagram of the saw teeth on the iron pad in this utility model; Figure 4 This is a schematic diagram of the composite gauge block in this utility model; Figure 5 This is an assembly diagram of the spring bar base in this utility model; Figure 6 This is a schematic diagram of the structure of the midlimb positioning block in this utility model; Figure 7 This is a schematic diagram of the adjustable buckle plate in this utility model; in: 1. Steel rail 2. Irregularly shaped elastic clip 3 elastic rail bases 4 composite gauge blocks 5. Midlimb positioning block; 6. Iron pad. 7. Double-layer rubber pad; 8. Rubber pad under rail. 9 Anchor bolts 10 Adjustable gap buckle plate 11 Embedded sleeve 21 Steel spring floating plate 22. Railway sleeper; 23. Steel spring vibration isolator 24. Serrated iron base plate; 25. Reinforcing steel bars inside floating slab. 31. Angled anchor hole 41 Track gauge facing groove 42 Track gauge block mounting boss. Detailed Implementation

[0017] The present invention will now be described in detail with reference to the accompanying drawings and embodiments: like Figures 1 to 7 As shown, a fastener for suppressing rail corrugation in small-radius floating slab tracks of subways includes an iron pad 6. The iron pad 6 is provided with a spring clip base 3 and a middle limb positioning block 5. An irregularly shaped spring clip 2 is fixed in the two parallel spring clip bases 3. The middle limb positioning block 5 is located between the two spring clip bases 3. The middle limb positioning block 5, the spring clip base 3, and the irregularly shaped spring clip 2 together fix the composite gauge block 4.

[0018] The composite gauge block 4 includes a vertical block, the upper end of which forms an integrally formed inclined block, and the vertical block and the inclined block are rounded. The vertical block and the inclined block enclose each other to form a gauge facing groove 41, which corresponds to the rail 1. A convex gauge block mounting boss 42 is formed on the back of the vertical block.

[0019] The middle limb positioning block 5 fixes the composite gauge block 4 laterally. A slot is formed in the middle limb positioning block 5, which accommodates the gauge block mounting boss 42 on the back of the composite gauge block 4.

[0020] The elastic base 3 adjusts and fixes the composite gauge block 4 by tilting and pressing down. The side of the elastic base 3 facing the composite gauge block 4 forms an arc-shaped mating groove, which is adapted to the arc-shaped outer contour of the composite gauge block 4.

[0021] An inclined mounting groove is formed inside the elastic bar base 3, and the inclined mounting groove is used to install and fix the irregular elastic bar 2.

[0022] The upper end of the elastic base 3 forms an inclined anchoring hole 31, which is connected to the inclined mounting groove, and the bolt in the inclined anchoring hole 31 can press down and tilt to hold the composite gauge block 4.

[0023] The irregularly shaped elastic bar 2 presses down on the inclined block of the composite gauge block 4, and the middle part of the irregularly shaped elastic bar 2 forms a U-shaped part, which presses down on the upper end of the inclined block.

[0024] The inclined mounting groove of the elastic bar base 3 forms an inner convex locking position, and the mounting section of the irregular elastic bar 2 forms an inner concave locking groove. The mounting section of the irregular elastic bar 2 is inserted into the inclined mounting groove, and the inner concave locking groove is engaged with the inner convex locking position.

[0025] The upper end of the iron pad 6 forms iron pad serrations 24, and the iron pad serrations 24 are provided with adjusting buckles 10 for fixing and adjusting.

[0026] Specifically, the irregular elastic bar includes two symmetrical mounting sections, which are inclined and fixed in the corresponding elastic bar base 3. The middle part of the irregular elastic bar forms a U-shaped part that presses down on the inclined block in the composite gauge block 4. The mounting section and the U-shaped part are connected by a spatial U-shaped section, which can both serve as a connection and raise the U-shaped part.

[0027] Specifically, the composite gauge blocks 4 are symmetrically arranged on both sides of the rail 1.

[0028] Specifically, the cross-section of the gauge block mounting boss 42 is trapezoidal, and correspondingly, the slot in the middle limb positioning block 5 is trapezoidal.

[0029] Specifically, a double-layer rubber pad 7 is provided at the lower end of the iron pad 6.

[0030] Specifically, the spring bar base 3 and the middle limb positioning block 5 are fixed to the iron pad 6 by conventional means such as welding or bolt connection.

[0031] Specifically, a rail under rubber pad 8 is provided at the lower end of the rail 1, and the rail under rubber pad 8 presses on the iron pad 6.

[0032] Specifically, an adjustment elongated hole is formed at the sawtooth 24 of the iron pad plate 6, and the long axis of the elongated hole is perpendicular to the rail 1.

[0033] Correspondingly, the lower end of the adjustable buckle plate 10 is serrated and engages with the saw teeth 24 of the iron pad plate. The engagement between the saw teeth of the adjustable buckle plate 10 and the iron pad plate 24 ensures that they do not move out of alignment. A through hole is formed in the adjustable buckle plate 10. After the anchor bolt 9 passes through the through hole and the adjustment elongated hole at the saw teeth 24 of the iron pad plate, it is screwed into the pre-embedded sleeve 11.

[0034] like Figure 2 As shown, the pre-embedded sleeve 11 is installed in the steel spring floating plate 21, the upper end of the steel spring floating plate 21 is provided with a sleeper 22 and a steel spring vibration isolator 23, and the steel spring floating plate 21 is provided with internal steel bars 25.

[0035] like Figure 3 As shown, the axis of the adjusting elongated hole at the sawtooth 24 of the iron pad also passes through the middle limb positioning block 5. Furthermore, the direction of the sawtooth 24 of the iron pad is parallel to the rail 1.

[0036] Specifically, the upper layer of the double-layer rubber pad 7 is a high-hardness rubber layer with a hardness of 70-80 Shore A and a thickness of 5-8 mm, made of nitrile rubber; the lower layer is a low-hardness rubber layer with a hardness of 50-60 Shore A and a thickness of 8-12 mm, made of a blend of natural rubber and neoprene rubber.

[0037] Specifically, the irregularly shaped spring clip 2 overcomes the drawbacks of conventional single-toe or ω-shaped spring clips used in fasteners. Traditional fasteners using single-toe spring clips are prone to stress concentration, breakage, or even splintering, and the spring clip torque is difficult to adjust. Using ω-shaped spring clips can easily lead to loosening, requiring re-tightening. Furthermore, the matching T-bolts are prone to misalignment or even breakage. The irregularly shaped spring clip 2, however, distributes force evenly and has adjustable torque; therefore, the clamping part is less prone to breakage or splintering.

[0038] Specifically, the middle limb positioning block 5 plays a longitudinal positioning role for the composite gauge block 4.

[0039] Specifically, the composite gauge block 4 is pressed against the bottom of the rail, isolating the rail and the elastic clip base 3, and can serve as insulation and gauge adjustment functions. Meanwhile, the irregularly shaped elastic clip 2 does not require a clip cap. The lateral positioning of the composite gauge block 4 is determined by the rail and the elastic clip base 3, while its longitudinal positioning is achieved by being engaged in the gauge facing groove 41.

[0040] Specifically, a straight-line fastener arrangement is adopted, with the anchor bolts 9 positioned on the outside of the composite gauge block 4. This increases the length of the iron pad plate 6 while reducing its width. This arrangement facilitates the placement of the steel spring vibration isolators 23 in the curved floating slab, and consequently, the internal reinforcement arrangement. Furthermore, the straight-line fastener arrangement is a symmetrical structure, allowing the fasteners to be reversed when the rail base slope is set on the sleeper surface, regardless of whether it's an inner or outer rail, which is beneficial for on-site construction and design.

[0041] Here, conventional subway fasteners are arranged diagonally, with anchor bolts 9 placed beside the elastic strip. Although this reduces the length of the fastener, it increases the width, which is detrimental to the arrangement of the steel spring vibration isolator 23 and the track bed reinforcement.

[0042] Specifically, an inclined anchoring hole 31 is pre-drilled in the elastic clip base 3. A bolt is inserted obliquely into the inclined anchoring hole 31, which can obliquely compress the composite gauge block 4, exerting pressure on the rail 1. This changes the fastener from single-point fastening to three-point fastening, reducing the stress on the elastic clip and improving the lateral stiffness of the fastener. At the same time, it can prevent the root of the elastic clip from being too close to the rail 1, causing stress concentration in the elastic clip.

[0043] This utility model uses an irregularly shaped elastic bar to overcome the shortcomings of the elastic bars used in conventional fasteners. The elastic pad under the iron pad plate adopts a double-layer rubber structure design to suppress the resonance of the track system, effectively suppress the generation and development of rail corrugation, while maintaining the vibration reduction performance of the floating plate and reducing the risk of fastener elastic bar breakage.

[0044] This utility model uses an irregularly shaped elastic bar, an elastic bar base, and a middle limb positioning block to adjust and fix the composite gauge block at multiple points, thereby realizing the adjustment of the small gauge and stiffness of the fastener.

[0045] This utility model achieves the adjustment and fixation of the iron pad plate through the sawtooth of the iron pad plate, the adjustable gap buckle plate, and the pre-embedded sleeve, while also realizing the large gauge adjustment of the fastener.

Claims

1. A fastener for inhibiting rail corrugation in a metro small-radius floating slab track, comprising an iron base plate (6), characterized in that: The iron pad (6) is provided with a spring bar base (3) and a middle limb positioning block (5). A shaped spring bar (2) is fixed in the two parallel spring bar bases (3). The middle limb positioning block (5) is located between the two spring bar bases (3). The middle limb positioning block (5), the spring bar base (3), and the shaped spring bar (2) together fix the composite gauge block (4).

2. The fastener for suppressing rail corrugation of a small-radius floating slab track of a subway according to claim 1, characterized in that: The composite gauge block (4) includes a vertical block, and an integrally formed inclined block is formed at the upper end of the vertical block. The vertical block and the inclined block are rounded and transitioned. The vertical block and the inclined block surround to form a gauge facing groove (41). The gauge facing groove (41) corresponds to the rail (1). A convex gauge block mounting boss (42) is formed on the back of the vertical block.

3. The fastener for suppressing rail corrugation of a small-radius floating slab track of a subway according to claim 2, characterized in that: The middle limb positioning block (5) fixes the composite gauge block (4) laterally. A slot is formed in the middle limb positioning block (5), and the slot accommodates the gauge block mounting boss (42) on the back of the composite gauge block (4).

4. The fastener for suppressing rail corrugation of a small-radius floating slab track of a subway according to claim 2, characterized in that: The elastic base (3) adjusts and fixes the composite gauge block (4) by tilting and pressing down. The elastic base (3) forms an arc-shaped mating groove on one side facing the composite gauge block (4). The arc-shaped mating groove is adapted to the arc-shaped outer contour of the composite gauge block (4).

5. The fastener for suppressing rail corrugation of a small-radius floating slab track of a subway according to claim 4, characterized in that: An inclined mounting groove is formed inside the elastic bar base (3), and the inclined mounting groove is used to install and fix the irregular elastic bar (2).

6. The fastener for suppressing rail corrugation of a small-radius floating slab track of a subway according to claim 5, characterized in that: The upper end of the elastic base (3) forms an inclined anchor hole (31), which is connected to the inclined mounting groove, and the bolt in the inclined anchor hole (31) can press down and tilt against the composite gauge block (4).

7. The fastener for suppressing rail corrugation of a small-radius floating slab track of a subway according to claim 2, characterized in that: The irregular elastic bar (2) presses down on the inclined block of the composite gauge block (4), and the middle part of the irregular elastic bar (2) forms a U-shaped part, which presses down on the upper end of the inclined block.

8. A fastener for suppressing rail corrugation in small-radius floating slab subway tracks according to claim 5, characterized in that: The inclined mounting groove of the elastic bar base (3) forms an inner convex locking position, and the mounting section of the irregular elastic bar (2) forms an inner concave locking groove. The mounting section of the irregular elastic bar (2) is inserted into the inclined mounting groove, and the inner concave locking groove is fastened in the inner convex locking position.

9. A fastener for suppressing rail corrugation in small-radius floating slab subway tracks according to claim 1, characterized in that: The upper end of the iron pad (6) forms iron pad serrations (24), and the iron pad serrations (24) are provided with adjusting buckles (10) for fixing and adjusting.

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