Improved guard rail pad arrangement with adjustable flangeway width

Abstract

The utility model relates to rail transit technology, aims at providing an improved adjustable flangeway width guard rail backing plate device. The device includes the support backing plate structure fixed on the bottom plate, the latter includes backing plate structure, rail support plate and a plurality of eccentric sleeves; the eccentric sleeve is formed by the columnar step structure of the fixed cap and the rod piece with the waist shape cross section superposition, its inside has the eccentric through hole deviating from the axial center, and the rod piece cross section is waist shape; the groove hole matched with the rod piece appearance is equipped on the rail support base, realizes the rail support plate fixed installation with the bolt passing into the eccentric through hole, the external shape size and the axial center of a plurality of eccentric sleeves are kept consistent, but the distance of eccentric through hole deviating from the axial center is different. By replacing the eccentric sleeve with different eccentric distance, the relative installation position of the rail support plate on the bottom plate can be conveniently adjusted, and the flangeway width increment caused by wear is compensated. The device is simple in structure, convenient to adjust, and improves the efficiency of railway guard rail installation and maintenance.

Description

Technical Field

[0001] This utility model relates to rail transit technology, and in particular to an improved rail guard plate device with adjustable wheel flange groove width. Background Technology

[0002] As a crucial component of railway tracks, guard rail pads are used to ensure the correct flange groove width between the guard rail and the main rail. The flange groove primarily guides the wheel flange smoothly through the hazardous space of the frog, preventing the wheel from colliding with the frog rail or accidentally entering a different track, thus ensuring safe train operation. During use, the friction between the main rail and guard rail causes wear due to the high-speed passage of wheels, leading to an excessively large flange groove gauge and increasing the risk of derailment. Therefore, the flange groove width must be calibrated and adjusted during both the installation and subsequent maintenance of railway guard rails.

[0003] Existing guardrail pad support structures typically employ an integrated guardrail pad assembly, secured to the guardrail with bolts. Adjusting the flange groove width of the guardrail pad usually involves adding or removing adjustment shims between the guardrail and the guardrail pad assembly. However, vibrations from passing vehicles can cause these shims to shift upwards, potentially leading to collisions and significant safety hazards over time. Some manufacturers have proposed using drilled holes for bolt fixation to prevent shifting. However, this requires removing all bolts from the guardrail each time the flange groove is adjusted. Another approach involves bending the ends of the shims to improve spacing, but these shims are often made of stainless steel, making bending difficult and requiring precise control to meet adjustment requirements. Therefore, current flange groove adjustment solutions suffer from high workload, time-consuming and labor-intensive operations, and high installation and maintenance costs.

[0004] Therefore, it is necessary to propose a completely new rim groove adjustment technology to solve the above problems. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide an improved guide rail pad device with adjustable wheel flange groove width.

[0006] To solve the technical problem, the solution of this utility model is:

[0007] An improved rail guard plate device with adjustable flange groove width is provided, comprising a base plate for supporting and fixing the rail and a support plate structure for supporting the rail, the support plate structure being fixedly installed on the base plate; the support plate structure includes a plate structure, a rail support plate, and an eccentric sleeve; wherein,

[0008] The pad structure is fixedly installed on the base plate, and the guard rail is supported by the local surface of the pad structure.

[0009] A rail support plate is movably mounted on a pad structure and adjacent to the supporting surface; the rail support plate includes a rail support base, and a vertical mounting wall and a vertical support wall fixed on the rail support base; a first slot is provided on the vertical mounting wall, and a first bolt passing through the first slot is used to fix the guard rail to the outside of the vertical mounting wall;

[0010] An eccentric sleeve is a columnar stepped structure formed by stacking a fixed cap and a waist-shaped rod. It has an eccentric through-hole offset from the axial center, and the rod has a waist-shaped cross-section. A second slot adapted to the shape of the rod is provided on the rail support base, into which the rod is embedded, and the size of the fixed cap is larger than the second slot. The rail support plate is fixed to the base plate using a second bolt inserted through the eccentric through-hole. Multiple eccentric sleeves have the same external shape, dimensions, and axial center, but the distance of the eccentric through-hole from the axial center varies. The relative installation position of the rail support plate on the base plate is adjusted by replacing eccentric sleeves with different eccentric distances to compensate for the increase in the flange groove width caused by wear.

[0011] As a further improvement, the surface of the fixing cap of the eccentric sleeve is provided with raised marks, recessed marks or flat printed marks representing its compensation value; the compensation value of the eccentric sleeve refers to the difference between the eccentric through hole of each eccentric sleeve and its axial center, and the maximum value of the compensation value of each eccentric sleeve is not less than 10mm.

[0012] As a further improvement, the eccentric sleeve is an integral structure formed by casting or milling, with a gap between its rod and the second slot, allowing for smooth insertion and removal to achieve installation and disassembly operations; the lower edge of the fixing cap has two opposing cut-out portions, forming two notched slots after installation.

[0013] As a further improvement, the rod size of the eccentric sleeve is slightly smaller than the second slot. A waist-shaped nylon bushing is nested on the outside of the rod, and a rubber washer is nested on the outside of the nylon bushing. The rubber washer fits against the lower edge of the fixing cap, and the edge of the rubber washer has two opposite cut-out portions, so that the lower edge of the fixing cap forms two notched grooves after installation.

[0014] As a further improvement, the pad structure and the base plate are provided with sequentially penetrating screw holes or through holes for inserting a second bolt that penetrates and fixes the eccentric sleeve and the rail support base. The nut size of the second bolt is larger than the diameter of the eccentric through hole.

[0015] As a further improvement, the rail support plate's rail support base, vertical mounting wall, and vertical support wall are integral structures formed by casting.

[0016] As a further improvement, the vertical support wall is a right-angled triangle with two sections, which are respectively connected to the two sides of the vertical mounting wall. The vertical support wall and the vertical mounting wall are both located on the side edge of the rail support base and are connected to each other to form an enclosed structure with a single-sided opening. The eccentric sleeve is located on the opening side of the enclosed structure, and a notch is provided on the vertical support wall on the opening side.

[0017] As a further improvement, the pad structure is fixed to the base plate by welding; or, the pad structure is fixed to the base plate using at least two sets of bolt assemblies; the upper surface of the pad structure has a stepped structure, and the rail support plate is installed on the surface below the stepped structure; a shim is provided on the stepped structure to support the guard rail; a recess is provided on the lower side of the outer edge of the stepped structure to press against the bottom of the rail.

[0018] As a further improvement, a platform groove is provided on the inner side of the stepped structure of the pad plate, and a base boss corresponding to the platform groove is provided on the outer side of the rail support base of the rail support plate; when different eccentric sleeves are used to change the relative installation position of the rail support plate on the base plate, the lower flange of the base boss always extends into the platform groove, and works with the second bolt to fix and limit the rail support plate.

[0019] As a further improvement, a rubber pad for supporting the rail base is laid on the middle surface of the base plate; the rubber pad has downward-extending flanges at both ends along the length of the rail for mounting its body on the base plate, and the pad structure and the elastic clip base are located on both sides of the rubber pad; the elastic clip base is fixed to the base plate by welding, and the third bolt is fitted with its nut in the T-groove of the elastic clip base with the screw facing upward; the elastic clip is fixed to the elastic clip base by the cooperation of the third bolt and nut, so that both sides of the rail base are firmly pressed by the recesses of the elastic clip and the pad structure; a fourth bolt is provided at both ends of the base plate for fixing the rail guard pad device on the sleeper.

[0020] Compared with the prior art, the beneficial effects of this utility model are:

[0021] 1. Compared with the traditional rail guard plate device that is welded into one piece, this utility model proposes to split the support plate structure used to support the rail into two relatively independent and relatively displaceable structures; at the same time, bolts and eccentric sleeves are used to achieve fixed installation; when adjustment is required, it is only necessary to disassemble and replace the eccentric sleeves with different eccentric distances to easily change the width of the wheel flange groove.

[0022] 2. The device uses the first slot and the first bolt to fix the guard rail on the vertical mounting wall, so that the guard rail is strongly supported by the rail support plate during operation; it can ensure that the relative position between the guard rail and the rail does not change, and maintain the stability of the frog structure.

[0023] 3. This device uses the replacement of multiple eccentric sleeves to adjust the flange groove width, allowing for quantitative control of the change. Compared to traditional methods that involve increasing or decreasing the number of inserts or bending their angles, this device offers more precise adjustment. Therefore, it is more conducive to maintaining stable rail operation and preventing damage caused by alterations to the frog structure.

[0024] 4. The device has a simple structure and is easy to adjust, which greatly improves the efficiency of railway guardrail installation and maintenance. Attached Figure Description

[0025] Figure 1 This is a schematic diagram (axial view) of using the rail guard plate device of this utility model to clamp the rail.

[0026] Figure 2 for Figure 1 The front view.

[0027] Figure 3 for Figure 1 Top view.

[0028] Figure 4 This is a schematic diagram of the rail support plate.

[0029] Figure 5 This is the axial view of the eccentric sleeve.

[0030] Figure 6 This is an exploded view of the eccentric sleeve.

[0031] Figure 7 This is a sectional view of the eccentric sleeve.

[0032] Figure 8 This is a diagram showing the installation position of the pad structure on the base plate.

[0033] Figure 9 This is a schematic diagram of a rubber pad.

[0034] Figure 10 This is a diagram showing the installation position of the rubber pad on the base plate.

[0035] Figure 11 This is a schematic diagram showing the installation of the third bolt in the spring clip base.

[0036] Figure 12 This is a diagram showing the initial state of the rail clamping device.

[0037] Figure 13 This is a schematic diagram showing the adjustment status of the guard rail pad device after long-term operation.

[0038] The attached diagram is labeled as follows: 1. Rail; 2. Guard rail; 3. Base plate; 31. Fixing hole; 32. Platform groove; 4. Rail support plate; 41. First slot; 42. Second slot; 43. Base boss; 5. Eccentric sleeve; 51. Fixing cap; 52. Rubber washer; 53. Nylon bushing; 54. Notch; 55. Eccentric hole; 56. Compensation value mark; 57. Rod; 6. First bolt; 7. Second bolt; 8. Pad structure; 9. T-slot; 10. Elastic clip; 11. Elastic clip base; 12. Third bolt; 13. Fourth bolt; 14. Step structure; 15. Pad block; 16. Rail support base; 17. Vertical mounting wall; 18. Vertical support wall; 19. Rubber pad. Detailed Implementation

[0039] The serial numbers assigned to components in this application, such as "first" and "second," are merely for distinguishing the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages). It should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used solely for the convenience of describing this application and simplifying the description. They do not 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 application.

[0040] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0041] 1. Structural Description of the Device

[0042] As shown in the figure, the improved rail guard plate device with adjustable wheel flange groove width of this utility model includes a base plate 3 for supporting and fixing the rail 1, and a support plate structure fixedly installed on the base plate 3 for supporting the rail guard 2. The support plate includes a plate structure 8, a rail support plate 4, and an eccentric sleeve 5.

[0043] The pad structure 8 is fixedly installed on the base plate 3, and the guard rail 2 is supported by a portion of the surface of the pad structure 8. For example, the pad structure 8 can be fixed to the base plate 3 by welding; or, the pad structure 8 can be fixed to the base plate 3 using at least two sets of bolt assemblies. The upper surface of the pad structure 8 has a stepped structure 14, and the rail support plate 4 is installed on the surface below the stepped structure 14. A shim block 15 is provided on the stepped structure 14 to support the guard rail 2. The shim block 15 can be a separate component or a protrusion extending further from the stepped structure 14 (i.e., integrated with the stepped structure 14 through a casting process). A recessed portion is provided on the lower side of the outer edge of the stepped structure 14 to press against the bottom of the rail 1.

[0044] On the central surface of the base plate 3, a rubber pad 19 is laid to support the rail base of the rail 1 and to provide shock absorption. The rubber pad 19 has downward-extending flanges at both ends, which are used to secure its body along the length of the rail 1 onto the base plate 3, preventing displacement or loosening due to rail 1 vibration. The pad structure 8 and the elastic clip base 11 are respectively arranged on both sides of the rubber pad 19, with the elastic clip base 11 fixed to the base plate 3 by welding. A T-shaped groove 9 with an upper opening is provided in the middle of the elastic clip base 11, and a third bolt 12 is fitted into it with a nut of a suitable shape, with the bolt threaded upwards through the opening of the T-shaped groove 9. The elastic clip 10 is fixed to the elastic clip base 11 using the nut on the third bolt 12, thus ensuring that both sides of the rail base of the rail 3 are firmly pressed against the elastic clip 10 and the recessed portion of the pad structure 8. Fourth bolts 13 are provided at both ends of the base plate 3 for fixing the rail guard pad device onto the sleeper.

[0045] The rail support plate 4 is movably mounted on the pad structure 8 and adjacent to the supporting surface (i.e., the stepped structure 14) of the pad structure 8. The rail support plate 4 includes a rail support base 16, and a vertical mounting wall 17 and a vertical support wall 18 fixed to the rail support base 16. A first slot 41 is provided in the vertical mounting wall 17, and the guard rail 2 is fixed to the outside of the vertical mounting wall 17 by a first bolt 6 passing through the first slot 41. As an example, the vertical support wall 18 is a right-angled triangle and has two sections, which are respectively connected to the two sides of the vertical mounting wall 17. The vertical support wall 18 and the vertical mounting wall 17 are both located on the side edge of the rail support base 16 and are connected to each other to form a single-sided open enclosure structure. The eccentric sleeve 5 is located on the open side of this enclosure structure. As an example, the rail support base 16, the vertical mounting wall 17 and the vertical support wall 18 are integral structures formed by casting; or they are fixedly connected by separate processing and welding.

[0046] The eccentric sleeve 5 is a columnar stepped structure formed by superimposing a fixing cap 51 and a rod 57 with a waist-shaped cross-section (or a double-rounded rectangular cross-section). It can be fabricated using structural steel and has an eccentric through hole 55 offset from the axial center. A second slot 42 adapted to the shape of the rod 57 is provided on the rail support base 16, into which the rod 57 is embedded, and the fixing cap 51 is larger than the second slot 42. The rail support plate 4 is fixedly mounted on the base plate 3 using a second bolt 7 that passes through the eccentric through hole 55. The external shape and axial center of the multiple eccentric sleeves 5 are consistent, but the distance of the eccentric through hole 55 from the axial center varies. By replacing eccentric sleeves 5 with different eccentric distances, the relative installation position of the rail support plate 4 on the base plate 3 can be adjusted, thus compensating for the increase in the wheel flange groove width caused by wear. Since the waist-shaped cross-section of the rod 57 is symmetrical about its axial center, the adjustment range using the eccentric sleeve 5 can be further expanded by changing the installation direction along the major axis.

[0047] The compensation value of the eccentric sleeve 5 refers to the difference between the eccentric through hole and its axial center. The maximum compensation value of each eccentric sleeve 5 is not less than 10mm. To facilitate the identification of different specifications of eccentric sleeves 5, a compensation value mark 56 representing its compensation value is provided on the surface of its fixing cap 51. The form of the mark 56 can be a raised mark or a recessed mark formed by casting or stamping, or a flat mark formed by printing.

[0048] The eccentric sleeve 5 can be machined into a single unit using casting or milling processes. Its rod 57 is installed with a gap between it and the second slot 42, allowing the eccentric sleeve 5 to be smoothly inserted and removed for installation and disassembly. The fixing cap 51 is designed with two opposing cutouts along its lower edge, forming two notches 54 after installation, facilitating removal of the eccentric sleeve 5 using a pry bar. Alternatively, cushioning components can be further incorporated into the design of the eccentric sleeve 5; such as… Figure 5 , 6 As shown, the rod 51 is designed to be slightly smaller than the second slot 42. A waist-shaped nylon bushing 53 is nested around the outside of the rod 51, and a rubber washer 52 is nested around the outside of the nylon bushing 53. The rubber washer 52 fits against the lower edge of the fixing cap 51. The edge of the rubber washer 52 has two opposing cutouts, so that the lower edge of the fixing cap 51 forms two notches 54 after installation, facilitating the insertion of a pry bar tool. As an example, the fixing cap 51 is made of Q275 carbon structural steel, the rubber washer 52 is made of neoprene rubber, and the nylon bushing 53 is made of glass fiber reinforced polyamide. During processing, the three components are first nested and assembled before vulcanization.

[0049] To facilitate the installation of the rail support plate 4, threaded holes or through holes are sequentially provided on the pad structure 8 and the base plate 3 for inserting the second bolt 7. The second bolt 7 passes through the eccentric sleeve 5 and the rail support base 16 for fixation, and its nut size is larger than the diameter of the eccentric through hole 51. Considering that the eccentric sleeve 5 is located on the opening side of the enclosed structure of the rail support plate 4, a notch is provided on the vertical support wall 18 on the opening side to facilitate tightening the second bolt 7 with a wrench. Considering that the rail guard pad device will also be subjected to horizontal forces from the vehicle during operation, in order to prevent the rail support plate 4 from squeezing the second bolt 7 under this force and causing a tendency to overturn, this utility model further proposes to provide a platform groove 32 on the inner side of the stepped structure 14 of the pad structure 8, and a base boss 43 corresponding to the platform groove 32 on the outer side of the rail support base 16 of the rail support plate 4. By designing a sufficiently deep groove 32 in the platform, the lower flange of the base boss 43 always extends into the groove 32 when the relative installation position of the rail support plate 4 on the base plate 3 is changed using different eccentric sleeves 5. This, together with the second bolt 7, secures and limits the rail support plate 4. Through this structural design, the rail support plate 4 maintains the structural stability of the rail guard plate device even when subjected to horizontal forces.

[0050] The first slot 41 has a certain lateral dimension, and when the guard rail 2 is fixedly installed using the first bolt 6, the installation position can be adjusted appropriately to meet the design requirements of the relative position between the guard rail 2 and the rail 1.

[0051] 2. Instructions for using the device

[0052] The guide rail pad device of this utility model can be used to adjust the width of the wheel flange groove. The specific adjustment method includes:

[0053] (1) Select an eccentric sleeve 5 with appropriate compensation value according to the design standard of the wheel flange groove width, and then complete the assembly and installation of each component in the guard rail pad device according to the aforementioned positional relationship, so that the bottom of the rail 1 is firmly pressed by the elastic strip 10 and the pad structure 8, the guard rail 2 is fastened to the outside of the vertical installation wall 17, and the second bolt is tightened so that the eccentric sleeve and the rail support plate can be installed stably.

[0054] (2) The width of the wheel flange groove gradually increases with the wear of the rail 1 and the guard rail 2 during operation. According to the change, the eccentric sleeve 5 with an appropriate compensation value is selected for replacement. The increase in the width of the wheel flange groove caused by wear is compensated by adjusting the relative installation position of the rail support plate 4 on the base plate 3. The first bolt 6 does not need to be removed during the adjustment process.

[0055] Figure 12The diagram shows the situation when the distance between the rail support plate 4 and the upper step structure 14 of the pad structure 8 is at its maximum. The eccentric sleeve 5 and the second bolt 7 work together to fix the rail support plate 4 and minimize the compensation value. At the same time, the lower flange of the base boss 43 is at its maximum relative distance to the groove 32 of the platform, but it is still constrained by it. Figure 13 The diagram shows the case where the distance between the rail support plate 4 and the upper step structure 14 of the pad structure 8 is the smallest. In this case, the eccentric sleeve 5 with the largest compensation value is used in conjunction with the second bolt 7 to fix the rail support plate 4. At the same time, the relative distance between the lower flange of the base boss 43 and the groove 32 of the platform is the smallest.

[0056] 3. A specific example

[0057] In this example, the rail guard plate, which is welded as a whole in the conventional technology, is divided into three parts: a base plate, a plate structure 8, and a rail support plate 4. The installation position of the rail support plate 4 is changed by using a replaceable eccentric sleeve 5, thereby further realizing the adjustment of the wheel flange groove width between the rail 1 and the guard rail 2.

[0058] Normally, the standard width of the flange groove between rail 1 and guard rail 2 is 42mm. However, wear and tear on rail 1 and guard rail 2 during use can cause the flange groove gauge to be too large. Based on the design of this utility model, the relative installation position of the rail support plate 4 on the rail support plate can be changed by replacing the eccentric sleeve 5 with an appropriate compensation value, thereby making the gauge meet the design standard requirements. As an example, the compensation value of the eccentric sleeve 5 is between -2mm and +10mm. At least 4 eccentric sleeves 5 should be set within this range. Seven different installation positions can be achieved by changing the installation direction along the major diameter, so that the change in compensation value remains uniform.

[0059] This utility model's design is simple and easy to operate. During on-site maintenance, simply loosen the second bolt 7 and remove the eccentric sleeve 5. Then, replace it with an eccentric sleeve 5 with an appropriate compensation value according to the wear condition to ensure the wheel flange groove gauge meets the required standard. During installation, adjust the installation position of the guide rail 2 on the rail support plate 4 accordingly, and finally tighten the two bolts. Therefore, compared with existing technologies, it has a simpler structure, is easier to operate, and significantly reduces the labor costs for installation and maintenance.

[0060] The specific embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above, and those skilled in the art can make various modifications or variations within the scope of the claims, which do not affect the substantive content of this utility model.

Claims

1. An improved guide rail pad device with adjustable flange groove width, comprising a base plate for supporting and fixing a steel rail and a support pad structure for supporting the guide rail, wherein the support pad structure is fixedly installed on the base plate; characterized in that, The support plate structure includes a plate structure, a rail brace, and multiple eccentric sleeves; among which... The pad structure is fixedly installed on the base plate, and the guard rail is supported by the local surface of the pad structure. A rail support plate is movably mounted on a pad structure and adjacent to the supporting surface; the rail support plate includes a rail support base, and a vertical mounting wall and a vertical support wall fixed on the rail support base; a first slot is provided on the vertical mounting wall, and a first bolt passing through the first slot is used to fix the guard rail to the outside of the vertical mounting wall; An eccentric sleeve is a columnar stepped structure formed by stacking a fixed cap and a waist-shaped rod. It has an eccentric through-hole offset from the axial center, and the rod has a waist-shaped cross-section. A second slot adapted to the shape of the rod is provided on the rail support base, into which the rod is embedded, and the size of the fixed cap is larger than the second slot. The rail support plate is fixed to the base plate using a second bolt inserted through the eccentric through-hole. Multiple eccentric sleeves have the same external shape, dimensions, and axial center, but the distance of the eccentric through-hole from the axial center varies. The relative installation position of the rail support plate on the base plate is adjusted by replacing eccentric sleeves with different eccentric distances to compensate for the increase in the flange groove width caused by wear.

2. The rail guard plate device according to claim 1, characterized in that, On the surface of the fixing cap of the eccentric sleeve, there are raised marks, recessed marks or flat printed marks representing its compensation value; the compensation value of the eccentric sleeve refers to the difference between the eccentric through hole of each eccentric sleeve and its axial center, and the maximum value of the compensation value of each eccentric sleeve is not less than 10mm.

3. The rail guard plate device according to claim 1, characterized in that, The eccentric sleeve is an integral structure formed by casting or milling. Its rod and the second slot are installed with a gap, which can be smoothly inserted or removed to realize installation and disassembly operations. The lower edge of the fixing cap has two opposite cut-out parts, so that two notch slots are formed after installation.

4. The guardrail pad device according to claim 1, characterized in that, The rod of the eccentric sleeve is slightly smaller than the second slot. A waist-shaped nylon bushing is nested on the outside of the rod, and a rubber washer is nested on the outside of the nylon bushing. The rubber washer fits the lower edge of the fixing cap, and the edge of the rubber washer has two opposite cut-out portions, so that the lower edge of the fixing cap forms two notch grooves after installation.

5. The rail guard plate device according to claim 1, characterized in that, The pad structure and the base plate are provided with sequentially penetrating screw holes or through holes for inserting a second bolt that penetrates and fixes the eccentric sleeve and the rail support base. The nut size of the second bolt is larger than the diameter of the eccentric through hole.

6. The guardrail pad device according to claim 1, characterized in that, The rail support plate's rail support base, vertical mounting wall, and vertical support wall are an integral structure formed by casting.

7. The rail guard plate device according to claim 1, characterized in that, The vertical support wall is a right-angled triangle and there are two of them, which are connected to the two sides of the vertical mounting wall respectively. The vertical support wall and the vertical mounting wall are both located on the side edge of the rail support base and are connected to each other to form an enclosed structure with a single-sided opening. The eccentric sleeve is located on the opening side of the enclosed structure, and a notch is provided on the vertical support wall on the opening side.

8. The rail guard plate device according to claim 1, characterized in that, The pad structure is fixed to the base plate by welding; or, the pad structure is fixed to the base plate by at least two sets of bolt assemblies; the upper surface of the pad structure has a stepped structure, and the rail support plate is installed on the surface below the stepped structure; a shim is provided on the stepped structure to support the guard rail; a recess is provided on the lower side of the outer edge of the stepped structure to press against the bottom of the rail.

9. The rail guard plate device according to claim 8, characterized in that, The inner side of the stepped structure of the pad plate is provided with a platform groove, and the outer side of the rail support base of the rail support plate is provided with a base boss corresponding to the platform groove. When different eccentric sleeves are used to change the relative installation position of the rail support plate on the base plate, the lower flange of the base boss always extends into the platform groove, and works with the second bolt to fix and limit the rail support plate.

10. The rail guard plate device according to any one of claims 1 to 9, characterized in that, On the central surface of the base plate, a rubber pad for supporting the rail base is laid. The rubber pad has downward-extending flanges at both ends along the length of the rail, which are used to clamp the body onto the base plate. The pad structure and the elastic clip base are located on both sides of the rubber pad. The elastic clip base is fixed to the base plate by welding. The third bolt is fitted with its nut into the T-groove of the elastic clip base with the screw facing upward. The elastic clip is fixed to the elastic clip base by the cooperation of the third bolt and nut, so that both sides of the rail base are firmly pressed against by the recesses of the elastic clip and the pad structure. A fourth bolt is provided at both ends of the base plate for fixing the rail guard pad device onto the sleeper.

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