An elastic pad concrete sleeper structure and construction method

Abstract

The present invention provides an elastic pad concrete sleeper structure and a construction method, belonging to the technical field of tracks. It includes a concrete sleeper main body, a rail main body, and the rail main body is installed on the top of the concrete sleeper main body through screws and nuts; an elastic pad main body, the elastic pad main body is connected to the bottom and side of the concrete sleeper main body for reducing ballast wear, and the elastic pad main body is made of polyurethane material; a docking plate, the docking plate is placed on the top of the concrete sleeper main body; a fixing component, the fixing component is sleeved outside the nut and is used to prevent the nut from falling off. In the present invention, six elastic pieces are initially in a state of storing energy and respectively abut against the arc-shaped blocks, thereby applying a rotational force to the docking ring. The inner wall of the docking ring has the same shape as the outside of the nut and is sleeved outside the nut. The limiting plate is pushed upward by the connecting component, so that the lower end of the limiting plate meshes with the outside of the limiting gear, thereby applying a rotational force to the nut through the docking ring.

Description

Technical Field

[0001] The present invention relates to the technical field of tracks, and particularly relates to an elastic pad concrete sleeper structure and a construction method thereof. Background Art

[0002] A concrete sleeper refers to a sleeper made of concrete with reinforcement; currently, the connection between the rail and the concrete sleeper is through an intermediate elastic clamping body connection method, which is to fix an elastic cushion block on the track, then place the rail above the cushion block, and clamp both sides of the rail with a bent elastic plate, and fix them together with bolts to form a whole. This method has good shock absorption and noise reduction effects compared with the direct connection method and is suitable for high-speed and heavy-haul railway lines. At present, the rail and the concrete sleeper are fixed together with bolts to form a whole. However, when a train passes over the rail, the rail and the concrete sleeper will be subjected to a large impact force and generate vibrations. The connection nuts of the rail and the concrete sleeper will become loose after long-term vibrations, resulting in the nuts detaching from the bolts, causing the rail to disconnect from the concrete sleeper, and thus increasing the workload of maintenance personnel. Therefore, the present application provides an elastic pad concrete sleeper structure and a construction method to meet the requirements. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an elastic pad concrete sleeper structure and a construction method to solve the problem that when a train passes over the rail, the rail and the concrete sleeper will be subjected to a large impact force and generate vibrations, and the connection nuts of the rail and the concrete sleeper will become loose after long-term vibrations, resulting in the nuts detaching from the bolts, causing the rail to disconnect from the concrete sleeper.

[0004] To solve the above technical problem, the present invention provides the following technical solutions:

[0005] A spring-loaded concrete sleeper structure comprises a concrete sleeper body, a rail body, the rail body being mounted on the top of the concrete sleeper body by means of screws and nuts, an spring-loaded plate body connected to the bottom and side of the concrete sleeper body for reducing ballast wear, the spring-loaded plate body being made of polyurethane material, a docking plate placed on the top of the concrete sleeper body, a fixing assembly sleeved on the outside of the nut and used to prevent the nut from falling off, a limiting assembly mounted on both sides of the fixing assembly and sliding inside the connecting assembly for locking the nut, a connecting assembly arranged on both sides of the fixing assembly for docking the fixing assembly with the docking plate, wherein the fixing assembly comprises a sleeve sleeved on the outside of the nut The top of the supporting frame is connected to the top of the fixing frame, and the top of the fixing frame is connected to the fixing frame.

[0006] Optionally, the nut vibrates repeatedly when the train passes by, and when the nut rotates clockwise during the vibration, the elastic sheet exerts a rotational force on the arc block and the docking ring, and the lower end limit plate is pushed through the limit gear to compress the spring, so that the nut and the docking ring can rotate normally.

[0007] Optionally, the limiting plate is composed of two right-angled trapezoids, and the acute angles at the upper and lower ends are staggered;

[0008] In the initial state, the upper end of the limit plate is engaged with the limit gear, and the docking ring, the limit gear, the connecting ring and the arc block cannot rotate due to the limit of the upper end of the limit plate.

[0009] Optionally, the connecting assembly includes fixed blocks fixed to both ends of the docking plate, docking frames are fixed on both sides of the fixed frame, the docking frames and the fixed blocks are kept vertical, a transmission rod is provided inside the docking frame, and a rectangular fixing rod is installed at the bottom of the transmission rod.

[0010] Optionally, a rectangular groove is formed in the top of the fixed block, and two communicating arc-shaped grooves are formed inside the fixed block and communicate with the rectangular groove. The inner diameter of the combination of the two arc-shaped grooves is consistent with the length of the fixed rod. The fixed rod is movably clamped in the two arc-shaped grooves, and limiting bumps for limiting the fixed rod are fixedly installed in the two arc-shaped grooves respectively.

[0011] Optionally, the limiting component further includes first limiting blocks installed on both sides of the limiting plate. A second limiting plate is fixedly installed at the bottom of the receiving frame, and a sliding block sliding inside the docking frame is connected to the side of the receiving frame.

[0012] Optionally, a through hole having the same shape as the rectangular groove at the top of the fixed rod is formed in the middle of the sliding block. The two docking frames are of a hollow structure, and sliding grooves for the sliding block to slide are formed in the opposite sides of the two docking frames.

[0013] Optionally, the sliding block and the inner part of the docking frame have the same specifications. The sliding block slides inside the docking frame, and the height sum of the sliding block and the fixed block is the same as the inner height of the docking frame.

[0014] Optionally, the docking frame is sleeved outside the fixed block, the sliding block contacts the top of the fixed block. Continuously pressing down the fixing component, the sliding block moves upward along the inside of the docking frame and synchronously drives the receiving frame and the limiting plate to move upward to compress the return spring, so that the lower end of the limiting plate meshes with the outside of the limiting gear.

[0015] Optionally, the density of the polyurethane material constituting the main body of the elastic cushion plate is 300 - 500 kg / m3, the static modulus is 0.05 - 1.0 N / mm3, and the surface is a filament-wound structure, which is convenient for the elastic cushion plate concrete sleeper to have high bonding strength with the cement and anti-displacement performance under multiple vibration states when laid on the cement foundation.

[0016] The present invention also provides a construction method for an elastic cushion plate concrete sleeper structure, including the following steps:

[0017] S1. Sleeve the docking frame outside the fixed block, and respectively pass the transmission rod and the fixed rod through the through hole in the middle of the sliding block and the rectangular groove at the top of the fixed block so that the fixed rod is located in the two arc-shaped grooves. Rotate the transmission rod and the fixed rod to clamp the fixed rod in the two arc-shaped grooves, and respectively limit the fixed rod through the two limiting bumps, then the docking frame can be fixed outside the fixed block, and at the same time, the fixing component is fixed outside the nut;

[0018] S2. When the docking frame is sleeved on the outside of the fixed block, the sliding block contacts the top of the fixed block. When the fixed assembly is pressed down, the sliding block moves upward along the inside of the docking frame, simultaneously pushing the receiving frame and the limit plate upward and compressing the return spring, so that the lower end of the limit plate engages with the outer side of the limit gear;

[0019] S3, the elastic sheet is initially in a state of stored force and respectively contacts the arc-shaped blocks, thereby applying a rotational force to the docking ring, and the inner wall of the docking ring is consistent with the outer shape of the nut and is sleeved on the outside of the nut. The limit plate is pushed upward through the connecting component, so that the lower end of the limit plate engages with the outer side of the limit gear, thereby applying a rotational force to the nut through the docking ring;

[0020] S4. At the same time, the rail body and the concrete sleeper body continue to vibrate when the train passes, causing the nut to rotate clockwise. At the same time, the push exerted by the elastic sheet drives the docking ring and the limit gear to rotate. During the rotation process, the lower end of the limit plate engages with the limit gear, thereby pushing the beveled compression spring at the lower end of the limit plate through the limit gear, allowing the nut to rotate clockwise normally and move down along the external thread of the screw.

[0021] Compared with the prior art, the present invention has at least the following beneficial effects:

[0022] In the above scheme, the six elastic sheets are initially in a stored force state and respectively contact the arc blocks, thereby applying a rotational force to the docking ring. The inner wall of the docking ring is consistent with the external shape of the nut and is sleeved on the outside of the nut. The limit plate is pushed upward through the connecting component, so that the lower end of the limit plate engages with the outside of the limit gear, thereby applying a rotational force to the nut through the docking ring.

[0023] The train passing through the rail body and the concrete sleeper body generates vibration, causing the nut to rotate clockwise. At the same time, the push exerted by the elastic sheet drives the docking ring and the limit gear to rotate. During the rotation process, the lower end of the limit plate engages with the limit gear, thereby pushing the beveled compression spring at the lower end of the limit plate through the limit gear, allowing the nut to rotate clockwise normally and move down along the external thread of the screw, further improving the stability of the nut fixing the rail body.

[0024] The docking frame is sleeved outside the fixed block, and the transmission rod and the fixed rod respectively penetrate through the central through hole of the sliding block and the rectangular groove at the top of the fixed block so that the fixed rod is located in the two arc-shaped grooves, and the sliding block contacts the top of the fixed block. During the process of pressing down the fixing component, the sliding block moves upward along the inside of the docking frame, synchronously pushing up the receiving frame and the limiting plate and compressing the return spring, so that the top of the second limiting plate contacts the bottom of the fixing frame. When the upper end of the limiting plate contacts the outside of the limiting gear, the docking ring and the limiting gear are limited, so that the elastic piece is always in a state of storing energy. When the lower end of the limiting plate moves upward and meshes with the outside of the limiting gear, the rotational force applied by the elastic piece is transmitted to the outside of the nut. Rotating the transmission rod and the fixed rod makes the fixed rod engage in the two arc-shaped grooves. Through the cooperation of the fixed rod and the two arc-shaped grooves, the docking frame can be fixed outside the fixed block, and at the same time, the fixing component can be fixed outside the nut. Furthermore, the fixing component can effectively prevent the nut from loosening or detaching from the outside of the screw rod during repeated vibrations. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings incorporated herein and constituting a part of the specification illustrate embodiments of the present invention and, together with the specification, further serve to explain the principles of the present invention and enable those skilled in the relevant art to implement and use the present invention.

[0026] Figure 1 It is a three-dimensional structural schematic diagram of an elastic pad concrete sleeper structure and a construction method;

[0027] Figure 2 It is a three-dimensional exploded structural schematic diagram of a fixing component and a nut of an elastic pad concrete sleeper structure and a construction method;

[0028] Figure 3 It is a three-dimensional structural schematic diagram of a screw rod, a nut, a main rail body and a main concrete sleeper body of an elastic pad concrete sleeper structure and a construction method;

[0029] Figure 4 It is a three-dimensional sectional structural schematic diagram of an elastic pad concrete sleeper structure and a construction method;

[0030] Figure 5 It is Figure 4 a three-dimensional enlarged structural schematic diagram at position A in

[0031] Figure 6 It is a three-dimensional structural schematic diagram of a fixing component with a top view cut open;

[0032] Figure 7 It is a three-dimensional structural schematic diagram of the cooperation of a fixing frame, a docking ring and a limiting component;

[0033] Figure 8 It is a three-dimensional sectional structural schematic diagram of a part of a fixing component;

[0034] Figure 9Schematic three-dimensional structure diagram of the cooperation between the limit gear and the limit component;

[0035] Figure 10 Schematic three-dimensional structure diagram of the limit component in section;

[0036] Figure 11 Schematic sectional structure diagram of the cooperation between the docking frame and the fixed block.

[0037] Figure 12 Schematic structure diagram of the elastic cushion plate arranged on the bottom surface and the side surface of the concrete sleeper body.

[0038] [Reference numerals]

[0039] 1. Concrete sleeper body; 2. Rail body; 3. Fixing component; 31. Fixing frame; 32. Elastic sheet; 33. Connecting ring; 34. Arc-shaped block; 35. Docking ring; 36. Limit gear; 4. Connecting component; 41. Docking frame; 42. Transmission rod; 43. Fixed rod; 44. Fixed block; 45. Limit convex block; 5. Docking plate; 6. Screw; 7. Nut; 8. Limit component; 81. Return spring; 82. Limit plate; 83. First limit block; 84. Second limit plate; 85. Sliding block; 86. Connecting block; 87. Bearing frame; 88. Spring; 9. Elastic cushion plate body.

[0040] As shown in the figure, in order to clearly show the structure of the embodiments of the present invention, specific structures and devices are marked in the figure, but this is only for schematic needs and is not intended to limit the present invention to this specific structure, device and environment. According to specific needs, those of ordinary skill in the art can adjust or modify these devices and environments. Detailed implementation manners

[0041] The following describes in detail a structure and construction method of an elastic cushion plate concrete sleeper provided by the present invention with reference to the drawings and specific embodiments. At the same time, it should be noted here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments. For some well-known technologies, those skilled in the art can also adopt other alternative methods for implementation; moreover, the drawing part is only for more specifically describing the embodiments and is not intended to specifically limit the present invention.

[0042] It should be noted that in the specification, references to "an embodiment", "embodiments", "exemplary embodiments", "some embodiments", etc. indicate that the described embodiments may include specific features, structures or characteristics, but not necessarily every embodiment includes such specific features, structures or characteristics. In addition, when combining embodiments to describe specific features, structures or characteristics, implementing such features, structures or characteristics in combination with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the relevant art.

[0043] Generally, terms can be understood, at least in part, from their use in context. For example, depending at least in part on the context, the term "one or more" as used herein can refer to any feature, structure, or property in a singular sense, or can refer to a combination of features, structures, or properties in a plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey a set of exclusive factors, but rather, depending at least in part on the context, can alternatively allow for other factors that are not necessarily explicitly described.

[0044] It will be understood that the meanings of "on", "above", and "over" in the present invention should be construed in the broadest manner such that "on" not only means "directly on" something, but also includes the meaning of being "on" something with intervening features or layers therebetween, and "above" or "over" not only means "above" or "over" something, but can also include the meaning of being "above" or "over" something with no intervening features or layers therebetween.

[0045] In addition, spatial relative terms such as "under", "below", "lower", "above", "upper", etc. may be used herein for convenience of description to describe the relationship of one element or feature to another or other elements or features, as shown in the figures. Spatial relative terms are intended to cover different orientations in the use or operation of the device in addition to the orientation depicted in the figures. The device may be oriented in other ways, and the spatial relative descriptors used herein may be interpreted accordingly.

[0046] As Figures 1 to 11As shown, the embodiment of the present invention provides an elastic pad concrete sleeper structure, including a concrete sleeper body 1, and also including a rail body 2, the rail body 2 is installed on the top of the concrete sleeper body 1 through a screw 6 and a nut 7; an elastic pad body 9, the elastic pad body 9 is connected to the bottom and side of the concrete sleeper body 1, used to reduce ballast wear, and the elastic pad body 9 is made of polyurethane material; a docking plate 5, the docking plate 5 is placed on the top of the concrete sleeper body 1; a fixing component 3, the fixing component 3 is sleeved on the outside of the nut 7 and used to prevent the nut 7 from falling off; a limiting component 8, the limiting component 8 is installed on both sides of the fixing component 3 and slides inside the connecting component 4 to lock the nut 7; a connecting component 4, the connecting component 4 is arranged on both sides of the fixing component 3 for docking the fixing component 3 with the docking plate 5; wherein the fixing component 3 includes a docking ring 35 sleeved on the outside of the nut 7, the inner wall of the docking ring 35 is consistent with the shape of the nut 7, the top of the docking ring 35 is connected to a fixing frame 31, and the top of the docking ring 35 is fixed with a connecting ring 33. The outer annular array of the connecting ring 33 has an arc block 34, the top annular array of the inner wall of the fixing frame 31 has an elastic sheet 32 that contacts the arc block 34, and the outer fixed sleeve of the docking ring 35 is provided with a limit gear 36; the limit assembly 8 includes a receiving frame 87 that slides on both sides of the fixing assembly 3, and the side of the receiving frame 87 is provided with a limit plate 82 that engages with the limit gear 36, and a spring 88 is connected between the limit plate 82 and the receiving frame 87. The top of the receiving frame 87 is installed with a connecting block 86, and the top of the connecting block 86 is connected to a reset The spring 81 is connected to the top of the inner wall of the fixing frame 31, and the receiving frame 87 and the limit plate 82 pass through the bottom of the fixing frame 31; the elastic sheet 32 is initially in a power storage state and respectively contacts the arc block 34; the nut 7 vibrates repeatedly when the train passes by, and when the nut 7 rotates clockwise during the vibration, the elastic sheet 32 exerts a rotational force on the arc block 34 and the docking ring 35, and the lower end limit plate 82 is pushed through the limit gear 36 to compress the spring 88, so that the nut 7 and the docking ring 35 can rotate normally.

[0047] The rail main body 2 is placed on the top of the concrete sleeper main body 1 and fixed to the top of the concrete sleeper main body 1 by a screw 6 and a nut 7. After the nut 7 is installed, the fixing frame 31 and the docking ring 35 are sleeved outside the nut 7. The six elastic pieces 32 are initially in a state of storing energy and are respectively in contact with the arc-shaped blocks 34, so as to apply a rotational force to the docking ring 35. The inner wall of the docking ring 35 has the same shape as the outside of the nut 7 and is sleeved outside the nut 7. The limiting plate 82 is pushed upward by the connecting component 4, so that the lower end of the limiting plate 82 meshes with the outside of the limiting gear 36, so as to apply a rotational force to the nut 7 through the docking ring 35, thus avoiding the phenomenon that the nut 7 rotates reversely due to the vibration generated when the train passes through the rail main body 2 and the concrete sleeper main body 1, resulting in the loosening of the fixation of the concrete sleeper main body 1. At the same time, the fixing frame 31 and the docking ring 35 are sleeved outside the nut 7 to prevent the nut 7 from detaching from the outside of the screw 6. At the same time, the rail main body 2 and the concrete sleeper main body 1 continuously generate vibrations when the train passes, resulting in the clockwise rotation of the nut 7. At the same time, with the push applied by the elastic pieces 32, the docking ring 35 and the limiting gear 36 are driven to rotate. During the rotation process, since the lower end of the limiting plate 82 meshes with the limiting gear 36, the hypotenuse at the lower end of the limiting plate 82 is pushed by the limiting gear 36 to compress the spring 88, so that the nut 7 can rotate clockwise normally and move downward along the external thread of the screw 6, further improving the stability of the fixation of the nut 7 to the rail main body 2;

[0048] An elastic sleeper structure with a certain elasticity is formed by pasting an elastic pad main body 9 on the bottom of the concrete sleeper main body 1. Laying elastic sleepers in a ballasted track structure can reduce the vibration impact of the train load on the track subgrade and transfer the train load to a larger longitudinal range. In addition, the elastic sleeper can increase the contact area between the bottom surface of the sleeper and the ballast, thereby slowing down the pulverization of the ballast and extending the maintenance period of the ballast bed.

[0049] Such as Figure 12 is a schematic diagram of the elastic pad main body 9 fixed on the bottom surface and the side surface of the concrete sleeper main body 1. When the concrete sleeper main body 1 is laid on the concrete foundation, it is sunk in the concrete foundation groove, and the elastic pad main body 9 arranged on the side surface can increase the anti-displacement performance of the concrete sleeper main body 1 under the vibration state.

[0050] Such as Figures 6 to 10 As shown, the limiting plate 82 is composed of two right trapezoids, and the acute angles at the upper and lower ends are staggered; in the initial state, the upper end of the limiting plate 82 meshes with the limiting gear 36, and the docking ring 35, the limiting gear 36, the connecting ring 33 and the arc-shaped block 34 cannot rotate under the limiting action of the upper end of the limiting plate 82.

[0051] The elastic sheet 32 is initially in a state of storing force, and the elastic sheet 32 respectively contacts the arc block 34, applying a rotational force to the docking ring 35. The limit plate 82 is initially under the action of the return spring 81, and the lower end of the limit plate 82 is engaged with the outside of the limit gear 36. At this time, the rotational force applied by the elastic sheet 32 is transmitted to the outside of the nut 7 through the docking ring 35, thereby limiting the limit gear 36 and the docking ring 35, so that the docking ring 35 cannot rotate.

[0052] like Figure 5 、 Figure 7 、 Figure 8 and Figure 11 As shown, the connecting assembly 4 includes a fixed block 44 fixed to both ends of the docking plate 5, and a docking frame 41 is fixed on both sides of the fixing frame 31. The docking frame 41 and the fixed block 44 remain vertical. A transmission rod 42 is sleeved inside the docking frame 41, and a rectangular fixing rod 43 is installed at the bottom of the transmission rod 42; a rectangular groove is provided on the top of the fixing block 44, and two connected arc grooves are provided inside the fixing block 44 and are connected to the rectangular groove. The inner diameter of the two arc grooves is consistent with the length of the fixing rod 43, and the fixing rod 43 is movably engaged in the two arc grooves. The interior of the arc groove is respectively fixed with a limiting protrusion 45 for limiting the fixing rod 43. When the fixing frame 31 and the docking ring 35 are sleeved on the outside of the nut 7, the two docking frames 41 are respectively sleeved on the outside of the fixing block 44, and the transmission rod 42 and the fixing rod 43 pass through the rectangular groove at the top of the fixing block 44 and are located in the two arc grooves. Then the transmission rod 42 and the fixing rod 43 are rotated and engaged in the arc groove, so that the docking frame 41 is fixed to the outside of the fixing block 44, and then the fixing assembly 3 is fixed to the outside of the nut 7 to prevent the nut 7 from rotating away from the outside of the screw 6.

[0053] like Figures 6 to 10 As shown, the limiting assembly 8 also includes a first limiting block 83 installed on both sides of the limiting plate 82, a second limiting plate 84 is fixed to the bottom of the receiving frame 87, and the side of the receiving frame 87 is connected to a sliding block 85 that slides inside the docking frame 41; a through hole is opened in the middle of the sliding block 85 with the same shape as the rectangular groove on the top of the fixed rod 43, and the two docking frames 41 are located in a hollow structure. The opposite sides of the two docking frames 41 are opened with a sliding groove for the sliding block 85 to slide; the sliding block 85 and the docking frame 41 The internal specifications are consistent, the sliding block 85 slides inside the docking frame 41, and the height of the sliding block 85 and the fixed block 44 is consistent with the internal height of the docking frame 41; the docking frame 41 is sleeved on the outside of the fixed block 44, and the sliding block 85 contacts the top of the fixed block 44, continuously pressing down the fixed component 3, and the sliding block 85 moves upward along the inside of the docking frame 41, synchronously driving the receiving frame 87 and the limit plate 82 to compress the reset spring 81, so that the lower end of the limit plate 82 engages with the outside of the limit gear 36.

[0054] The docking frame 41 is sleeved outside the fixed block 44, and the transmission rod 42 and the fixed rod 43 respectively penetrate through the central through hole of the sliding block 85 and the rectangular groove at the top of the fixed block 44, so that the fixed rod 43 is located in the two arc-shaped grooves. The sliding block 85 contacts the top of the fixed block 44. During the process of pressing down the fixing assembly 3, the sliding block 85 moves upward along the inside of the docking frame 41, synchronously pushing up the receiving frame 87 and the limiting plate 82 and compressing the return spring 81, so that the top of the second limiting plate 84 contacts the bottom of the fixed frame 31. When the upper end of the limiting plate 82 contacts the outside of the limiting gear 36, the docking ring 35 and the limiting gear 36 are limited, so that the elastic piece 32 is always in a state of storing energy. When the lower end of the limiting plate 82 moves upward and meshes with the outside of the limiting gear 36, the rotational force applied by the elastic piece 32 to the docking ring 35 is transmitted to the outside of the nut 7. When the docking frame 41 is completely sleeved outside the fixed block 44, at this time, the transmission rod 42 and the fixed rod 43 are rotated to make the fixed rod 43 engage in the two arc-shaped grooves. By the cooperation of the fixed rod 43 and the two arc-shaped grooves, and respectively limiting the fixed rod 43 through the two limiting protrusions 45, the docking frame 41 can be fixed outside the fixed block 44, and at the same time, the fixing assembly 3 can be fixed outside the nut 7. Furthermore, the fixing assembly 3 can effectively prevent the nut 7 from loosening or detaching from the outside of the screw rod 6 during repeated vibrations.

[0055] The present invention also provides a construction method for an elastic cushion concrete sleeper structure, including the following steps:

[0056] S1. The docking frame 41 is sleeved outside the fixed block 44, and the transmission rod 42 and the fixed rod 43 respectively penetrate through the central through hole of the sliding block 85 and the rectangular groove at the top of the fixed block 44, so that the fixed rod 43 is located in the two arc-shaped grooves. The transmission rod 42 and the fixed rod 43 are rotated to make the fixed rod 43 engage in the two arc-shaped grooves, and the fixed rod 43 is respectively limited by the two limiting protrusions 45, so that the docking frame 41 can be fixed outside the fixed block 44, and at the same time, the fixing assembly 3 can be fixed outside the nut 7.

[0057] S2. During the process of the docking frame 41 being sleeved outside the fixed block 44, the sliding block 85 contacts the top of the fixed block 44. During the process of pressing down the fixing assembly 3, the sliding block 85 moves upward along the inside of the docking frame 41, synchronously pushing up the receiving frame 87 and the limiting plate 82 and compressing the return spring 81, so that the lower end of the limiting plate 82 meshes with the outside of the limiting gear 36.

[0058] S3. The elastic piece 32 is initially in a state of storing energy and respectively abuts against the arc-shaped block 34, thereby applying a rotational force to the docking ring 35. The inner wall of the docking ring 35 has the same shape as the outside of the nut 7 and is sleeved outside the nut 7. The limiting plate 82 is pushed upward by the connecting assembly 4, so that the lower end of the limiting plate 82 meshes with the outside of the limiting gear 36, thereby applying a rotational force to the nut 7 through the docking ring 35.

[0059] S4. Meanwhile, as the main body of the rail 2 and the main body of the concrete sleeper 1 continuously vibrate when the train passes by, the nut 7 rotates clockwise. At the same time, with the push applied by the elastic sheet 32, the docking ring 35 and the limit gear 36 are driven to rotate. During the rotation process, since the lower end of the limit plate 82 meshes with the limit gear 36, the hypotenuse at the lower end of the limit plate 82 is pushed by the limit gear 36 to compress the spring 88, enabling the nut 7 to rotate clockwise normally and move downward along the external thread of the screw rod 6.

[0060] The present invention covers any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of the present invention. To enable the public to have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention. However, those skilled in the art can fully understand the present invention without the description of these details. Additionally, to avoid unnecessary confusion to the essence of the present invention, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0061] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. An elastic pad concrete sleeper structure, characterized in that, including a concrete sleeper body; A rail body, the rail body being mounted on the top of the concrete sleeper body through a screw and a nut; An elastic pad body, connected to the bottom and side of the concrete sleeper body, for reducing ballast wear, and made of polyurethane material; a butt joint plate, the butt joint plate being placed on top of the concrete sleeper body; A fixing assembly, which is sleeved on the outside of the nut and is used to prevent the nut from falling off; A limiting assembly is installed on both sides of the fixing assembly and slides inside the connecting assembly to lock the nut; Connecting components, the connecting components are arranged on both sides of the fixing component and are used for connecting the fixing component with the docking plate; The fixing assembly includes a docking ring sleeved on the outside of the nut, the inner wall of the docking ring is consistent with the shape of the nut, the top of the docking ring is connected to a fixing frame, the top of the docking ring is fixed with a connecting ring, the outer annular array of the connecting ring has an arc block, the top annular array of the inner wall of the fixing frame has an elastic sheet that contacts the arc block, and the outer fixed sleeve of the docking ring is provided with a limiting gear; The limiting assembly includes a receiving frame sliding on both sides of the fixing assembly, the side of the receiving frame is provided with a limiting plate engaged with the limiting gear, a spring is connected between the limiting plate and the receiving frame, a connecting block is installed on the top of the receiving frame, the top of the connecting block is connected to a return spring and the top end is connected to the top of the inner wall of the fixing frame, the receiving frame and the limiting plate pass through the bottom of the fixing frame; The elastic sheets are initially in a force storage state and respectively contact the arc blocks.

2. The elastic pad concrete sleeper structure according to claim 1, wherein The nut vibrates repeatedly when the train passes by, and when the nut rotates clockwise during the vibration, the elastic sheet exerts a rotational force on the arc block and the docking ring, and the lower end limit plate is pushed through the limit gear to compress the spring, so that the nut and the docking ring can rotate normally.

3. The elastic cushion concrete sleeper structure according to claim 1, characterized in that, The limit plate is composed of two right-angled trapezoids, and the acute angles at the upper and lower ends are staggered; In the initial state, the upper end of the limit plate is engaged with the limit gear, and the docking ring, the limit gear, the connecting ring and the arc block cannot rotate due to the limit of the upper end of the limit plate.

4. The elastic cushion concrete sleeper structure according to claim 1, characterized in that, The connecting assembly includes fixed blocks fixedly mounted on both ends of the docking plate, docking frames fixedly mounted on both sides of the fixed frame, the docking frames and the fixed blocks remain vertical, a transmission rod is sleeved inside the docking frame, and a rectangular fixing rod is installed at the bottom of the transmission rod.

5. The elastic pad concrete sleeper structure according to claim 4, wherein, A rectangular groove is provided on the top of the fixing block, and two connected arc grooves are provided inside the fixing block and are connected to the rectangular groove. The inner diameter of the combination of the two arc grooves is consistent with the length of the fixing rod. The fixing rod is movably engaged in the two arc grooves, and the inside of the two arc grooves is respectively fixed with a limiting protrusion for limiting the fixing rod.

6. The elastic cushion concrete sleeper structure according to claim 5, wherein, The limiting assembly further includes first limiting blocks installed on both sides of the limiting plate, a second limiting plate is fixed to the bottom of the supporting frame, and a sliding block is connected to the side of the supporting frame to slide inside the docking frame.

7. The elastic cushion concrete sleeper structure according to claim 6, characterized in that, A through hole having the same shape as the rectangular groove at the top of the fixing rod is opened in the middle of the sliding block, and the two docking frames are located in the hollow structure. Slide grooves for the sliding block to slide are opened on opposite sides of the two docking frames.

8. The elastic cushion concrete sleeper structure according to claim 6, characterized in that, The sliding block has the same specifications as the interior of the docking frame, and the sliding block slides inside the docking frame. The height of the sliding block and the fixed block is consistent with the height of the interior of the docking frame.

9. The elastic cushion concrete sleeper structure according to claim 8, characterized in that, The docking frame is sleeved on the outside of the fixed block, and the sliding block contacts the top of the fixed block, continuously pressing the fixed assembly downward, and the sliding block moves upward along the inside of the docking frame and synchronously drives the receiving frame and the limit plate to compress the reset spring upward, so that the lower end of the limit plate engages with the outside of the limit gear.

10. The elastic cushion concrete sleeper structure according to claim 8, characterized in that, The density of the polyurethane material constituting the main body of the elastic pad is 300-500kg / m3, the static modulus is 0.05-1.0N / mm3, and the surface is a filamentous winding structure, which makes it convenient for the elastic pad concrete pillow to be laid on the cement foundation. The elastic pad and cement have high bonding strength and anti-displacement performance under multiple vibration conditions.

11. A construction method of an elastic pad concrete sleeper structure, adopting the elastic pad concrete sleeper structure described in any one of claims 1-9, characterized in that, The following steps are involved: S1. The docking frame is sleeved on the outside of the fixed block, and the transmission rod and the fixed rod respectively pass through the through hole in the middle of the sliding block and the rectangular groove on the top of the fixed block so that the fixed rod is located in the two arc-shaped grooves. The transmission rod and the fixed rod are rotated so that the fixed rod is engaged in the two arc-shaped grooves, and the fixed rod is limited by the two limiting protrusions. The docking frame can be fixed to the outside of the fixed block, and the fixing assembly can be fixed to the outside of the nut at the same time; S2. When the docking frame is sleeved on the outside of the fixed block, the sliding block contacts the top of the fixed block. When the fixed assembly is pressed down, the sliding block moves upward along the inside of the docking frame, simultaneously pushing the receiving frame and the limit plate upward and compressing the return spring, so that the lower end of the limit plate engages with the outer side of the limit gear; S3, the elastic sheet is initially in a state of stored force and respectively contacts the arc-shaped blocks, thereby applying a rotational force to the docking ring, and the inner wall of the docking ring is consistent with the outer shape of the nut and is sleeved on the outside of the nut. The limit plate is pushed upward through the connecting component, so that the lower end of the limit plate engages with the outer side of the limit gear, thereby applying a rotational force to the nut through the docking ring; S4. At the same time, the rail body and the concrete sleeper body continue to vibrate when the train passes, causing the nut to rotate clockwise. At the same time, the push exerted by the elastic sheet drives the docking ring and the limit gear to rotate. During the rotation process, the lower end of the limit plate engages with the limit gear, thereby pushing the beveled compression spring at the lower end of the limit plate through the limit gear, allowing the nut to rotate clockwise normally and move down along the external thread of the screw.

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