Single-face trapezoidal polyester elastomer pad plate for heavy load railway

Abstract

The utility model relates to the field of rail transit technology provides a single side prismatic platform polyester elastomer pad for heavy haul railway, include: mainboard and vice board, smooth part, set up in the one side surface of mainboard, still include: a plurality of positioning portion, set up in the four corners of mainboard surface, the utility model discloses, through vice board upper surface contact rail bottom, mainboard lower surface contact cement sleeper upper portion, and vice board upper surface adopts prismatic platform one structure design, can provide elasticity through deflection, shearing, compression deformation under the action of vertical force, and deformation recovers rapidly after unloading, at the same time in the pit between two adjacent prismatic platform one, set up prismatic platform two guarantee train under overload or special working condition, realize the growth of secondary static stiffness, guarantee the stability of rail, prevent rail upset, through the smooth part surface of mainboard surface adopts plane design, increase contact area, reduce stress concentration, alleviate the wear and tear of cement sleeper.

Description

Technical Field

[0001] This utility model relates to the field of rail transit technology, and in particular to a single-sided frustum polyester elastomer pad for heavy-duty railways. Background Technology

[0002] In recent years, the construction of rail transit has been booming. At present, the lines are basically designed with ballastless track. Therefore, how to reduce track vibration and noise has become a problem that has always been of great concern. The construction of rail transit in areas with large temperature differences and distinct seasons objectively requires that the fastener pads have universality. The pads should be able to adapt to the large temperature difference and still have basically unchanged elastic properties. Of course, the long fatigue life of the pads is also the eternal pursuit of users.

[0003] In the existing technology, the commonly available rubber pads or polyester elastomer pads usually have grooves or frustums designed on the upper and lower surfaces of the pad to reduce the static stiffness of the pad and ensure that the pad is used as an elastic component. Due to the structural design of the lower surface of the pad, stress concentration occurs. During track operation, the lower surface of the pad will rub against the concrete sleeper, causing wear on the concrete sleeper. The maximum wear on the sleeper can be 8-10mm, which seriously affects the strength and service life of the sleeper. Therefore, a solution is needed. Utility Model Content

[0004] The purpose of this utility model is to solve the problem in the existing technology: the commonly used rubber pads or polyester elastomer pads on the market usually have grooves or frustums designed on the upper and lower surfaces of the pad to reduce the static stiffness of the pad and ensure that the pad is used as an elastic element. Due to the structural design of the lower surface of the pad, stress concentration occurs. During the operation of the line, the lower surface of the pad will rub against the concrete sleeper, causing the concrete sleeper to wear. At the maximum, the sleeper will wear by 8-10mm, which seriously affects the strength and service life of the sleeper.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a single-sided frustum polyester elastomer pad for heavy-duty railways, comprising: a main plate and a sub-plate, a smooth portion disposed on one side surface of the main plate; and further comprising:

[0006] Multiple positioning parts are disposed at the four corners of the motherboard surface;

[0007] Multiple long slots are formed on the surface of the main board away from the smooth part, and multiple circular limiting holes are formed inside the main board near the long slots.

[0008] Preferably, the main board and the sub-board are made of high-performance polyether ester elastomer modified material or polymer composite material, and the sub-board has multiple truncated pyramids on the surface away from the main board.

[0009] The technical advantages of adopting the above-mentioned further solutions are: firstly, the main board and the sub-board are made of polyester elastomer material, which has higher strength, modulus and comprehensive performance than rubber material, and can be recycled and reused, which is conducive to environmental protection.

[0010] Preferably, a second frustum is provided at a symmetrical location away from the main board surface of the sub-plate, and multiple second frustums are provided between two adjacent first frustums.

[0011] The technical effect of adopting the above-mentioned further solution is that by setting the second frustum on the surface of the sub-plate between the first frustum, it is ensured that the train achieves a secondary increase in static stiffness under overload or special working conditions, thus ensuring the stability of the rail.

[0012] Preferably, the sub-plate has circular holes at the four corners of its surface, and a circular ring is slidably embedded inside the multiple circular holes.

[0013] The technical effect of adopting the above-mentioned further solution is that the internal ring is limited by the circular hole on the surface of the sub-plate.

[0014] Preferably, the surfaces of the plurality of rings away from the sub-plate are provided with grooves, and the surfaces of the plurality of rings away from the grooves are provided with short shafts.

[0015] The technical advantage of adopting the above-mentioned further solution is that the groove on the surface of the ring facilitates the rotation of the short axis on the surface of the ring by means of a tool.

[0016] Preferably, a limiting block is provided on one end surface of the multiple short shafts, and the multiple short shafts are embedded inside the long groove.

[0017] The technical effect of adopting the above-mentioned further solution is that when the short shaft moves inside the long groove, it drives the limit block to move.

[0018] Preferably, the plurality of limiting blocks are slidably embedded on the inner wall of the long groove, and the plurality of limiting blocks are movably embedded inside the circular limiting hole.

[0019] The technical effect of adopting the above-mentioned further solution is: the limiting block is aligned with the long groove and embedded. When the limiting block is embedded in the circular limiting hole, the limiting block is rotated. At this time, the circular limiting hole limits the limiting block and completes the positioning of the sub-plate.

[0020] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0021] 1. In this utility model, the upper surface of the sub-plate contacts the bottom of the rail, and the lower surface of the main plate contacts the upper part of the concrete sleeper. The upper surface of the sub-plate adopts a frustum structure design, which can provide elasticity through flexural, shearing, and compression deformation under vertical force. After the force is unloaded, the deformation recovers quickly. At the same time, a frustum is set in the pit between two adjacent frustums to ensure that the train achieves secondary static stiffness increase under overload or special working conditions, ensuring the stability of the rail and preventing the rail from tipping over. The smooth part of the main plate surface adopts a planar design to increase the contact area, reduce stress concentration, and alleviate the wear of the concrete sleeper.

[0022] 2. In this utility model, a tool is fitted onto the surface of the groove, causing the ring to rotate inside the circular limiting hole via a short shaft. When the limiting block coincides with the long groove, the limiting block is disassembled from the long groove by pulling the sub-plate, and the sub-plate is disassembled as a whole. The device is injection molded or molded, so that when a single part is worn, it can be replaced, avoiding waste. Attached Figure Description

[0023] Figure 1 A top view of the structure of a single-sided frustum polyester elastomer pad for heavy-duty railways is provided for this utility model.

[0024] Figure 2 This utility model presents a schematic diagram of the unfolded structure of a single-sided frustum polyester elastomer pad for heavy-duty railways.

[0025] Figure 3 This utility model provides a partial cross-sectional view of a single-sided frustum polyester elastomer pad for heavy-duty railways.

[0026] Figure 4 This utility model presents a partially unfolded structural diagram of a single-sided frustum polyester elastomer pad for heavy-duty railways.

[0027] Legend:

[0028] 1. Main board; 101. Positioning part; 102. Smoothing part; 103. Long groove; 104. Circular limiting hole; 2. Sub-plate; 201. Frustum I; 202. Frustum II; 203. Circular hole; 204. Circular ring; 2041. Groove; 205. Short shaft; 206. Limiting block. Detailed Implementation

[0029] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0030] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0031] Example 1, as Figures 1 to 4 As shown, this utility model provides a single-sided frustum polyester elastomer pad for heavy-duty railways, including: a main plate 1 and a secondary plate 2, a smooth part 102 disposed on one side surface of the main plate 1; it also includes: a plurality of positioning parts 101 disposed at the four corners of the surface of the main plate 1; a plurality of long grooves 103 formed on the surface of the main plate 1 away from the smooth part 102, and a plurality of circular limiting holes 104 formed inside the main plate 1 near the long grooves 103.

[0032] In this embodiment, the upper surface of the sub-plate 2 contacts the bottom of the rail, and the lower surface of the main plate 1 contacts the upper part of the concrete sleeper. The upper surface of the sub-plate 2 adopts a frustum-201 structure design, which can provide elasticity through flexural, shear, and compression deformation under vertical force. After the force is released, the deformation recovers quickly. At the same time, a frustum-202 is provided in the pit between two adjacent frustum-201 to ensure that the train achieves secondary static stiffness increase under overload or special working conditions, ensuring the stability of the rail and preventing the rail from tipping over. The smooth part 102 of the main plate 1 adopts a planar design to increase the contact area, reduce stress concentration, and alleviate the wear of the concrete sleeper.

[0033] In Example 2, the main board 1 and the sub-board 2 are made of high-performance polyether ester elastomer modified material or polymer composite material. The sub-board 2 has multiple frustums 1 201 on the surface away from the main board 1, and frustums 202 are symmetrically arranged on the sub-board 2 away from the main board 1. The multiple frustums 202 are arranged between two adjacent frustums 1 201. Circular holes 203 are opened at the four corners of the surface of the sub-board 2. Circular rings 204 are slidably embedded in the multiple circular holes 203. The surfaces of the multiple circular rings 204 away from the sub-board 2 have grooves 2041. The surfaces of the multiple circular rings 204 away from the grooves 2041 have short shafts 205. Limiting blocks 206 are provided on one end surface of the multiple short shafts 205. The multiple short shafts 205 are embedded in the interior of the long groove 103. The multiple limiting blocks 206 are slidably embedded on the inner wall of the long groove 103. The multiple limiting blocks 206 are movably embedded in the interior of the circular limiting holes 104.

[0034] In this embodiment, a tool is fitted onto the surface of the slot 2041, causing the ring 204 to rotate inside the circular limiting hole 104 via the short shaft 205 and the limiting block 206. When the limiting block 206 coincides with the long slot 103, the sub-plate 2 is pulled to disassemble the limiting block 206 from the long slot 103, allowing the sub-plate 2 to be disassembled as a whole. The device is injection molded or molded, so that when a single part is worn, it can be replaced, avoiding waste.

[0035] Working principle: During use, the pad is sandwiched between the rail and the concrete sleeper. The upper surface of the secondary plate 2 contacts the bottom of the rail, and the lower surface of the main plate 1 contacts the upper part of the concrete sleeper. The upper surface of the secondary plate 2 adopts a frustum-201 structure design, which can provide elasticity through bending, shearing, and compression deformation under vertical force. After the force is unloaded, the deformation recovers quickly. At the same time, a frustum-202 is set in the recess between two adjacent frustum-201 to ensure that the train can achieve a secondary increase in static stiffness under overload or special working conditions, thus ensuring the stability of the rail.

Claims

1. A single-sided frustum polyester elastomer pad for heavy-duty railways, comprising: A main board (1) and a sub-board (2), a smooth portion (102) being disposed on one side surface of the main board (1); characterized in that it further comprises: Multiple positioning parts (101) are disposed at the four corners of the surface of the main board (1); Multiple long slots (103) are formed on the surface of the main board (1) away from the smooth part (102), and multiple circular limiting holes (104) are formed inside the main board (1) near the long slots (103).

2. The single-sided frustum polyester elastomer pad for heavy-duty railways according to claim 1, characterized in that: The main board (1) and the sub-board (2) are made of high-performance polyether ester elastomer modified material or polymer composite material. The sub-board (2) has multiple truncated pyramids (201) on the surface away from the main board (1).

3. The single-sided frustum polyester elastomer pad for heavy-duty railways according to claim 2, characterized in that: The subplate (2) is provided with a second truncated pyramid (202) at a symmetrical position away from the surface of the main plate (1), and multiple second truncated pyramids (202) are arranged between two adjacent first truncated pyramids (201).

4. A single-sided frustum polyester elastomer pad for heavy-duty railways according to claim 3, characterized in that: The sub-plate (2) has round holes (203) at the four corners of its surface, and a ring (204) is slidably embedded inside the multiple round holes (203).

5. A single-sided frustum polyester elastomer pad for heavy-duty railways according to claim 4, characterized in that: The surfaces of the plurality of rings (204) away from the sub-plate (2) are provided with slots (2041), and the surfaces of the plurality of rings (204) away from the slots (2041) are provided with short shafts (205).

6. A single-sided frustum polyester elastomer pad for heavy-duty railways according to claim 5, characterized in that: A limiting block (206) is provided on one end surface of the multiple short shafts (205), and the multiple short shafts (205) are embedded in the interior of the long groove (103).

7. A single-sided frustum polyester elastomer pad for heavy-duty railways according to claim 6, characterized in that: Multiple limiting blocks (206) are slidably embedded in the inner wall of the long groove (103), and multiple limiting blocks (206) are movably embedded in the inside of the circular limiting hole (104).

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