Elastic base plate concrete sleeper structure and construction method

Abstract

The invention provides an elastic base plate concrete sleeper structure and a construction method, and belongs to the technical field of rails. Comprising a concrete sleeper body and a steel rail body, and the steel rail body is installed on the top of the concrete sleeper body through screws and nuts; the elastic base plate main body is connected to the bottom and the side part of the concrete sleeper main body, is used for reducing the abrasion of a railway ballast, and is made of a polyurethane material; the butt joint plate is placed at the top of the concrete sleeper body; the fixing assembly is arranged outside the nut in a sleeving mode and used for preventing the nut from falling off. Six elastic pieces are initially in a force storage state and abut against arc-shaped blocks correspondingly, so that rotating force is applied to a butt joint ring, the inner wall of the butt joint ring is consistent with the outer shape of a nut, the nut is sleeved with the butt joint ring, a limiting plate is pushed upwards through a connecting assembly, and the lower end of the limiting plate is engaged with the outer portion of a limiting gear; therefore, a rotating force is applied to the nut through the butt joint ring.

Description

Technical Field

[0001] The invention relates to the technical field of tracks, and in particular to an elastic pad concrete pillow structure and a construction method. Background Art

[0002] A concrete sleeper refers to a sleeper cast with concrete and reinforced with reinforcement. Currently, the connection between the rail and the concrete sleeper is through an intermediate elastic clamp connection method, which is to fix an elastic pad on the track, then place the rail on top of the pad, clamp the two sides of the rail with a curved elastic plate, and fix them to each other through bolts to form a whole. Compared with the direct connection method, this method has good shock absorption and noise reduction effects, and is suitable for high-speed and heavy-load railway lines. The existing rail and concrete sleeper are fixed to form a whole through bolts, but when a train passes over the rail, the rail and the concrete sleeper will be subjected to a large impact force and vibrate. The long-term vibration connection nut between the rail and the concrete sleeper will loosen, causing the nut to detach from the screw, causing the rail to detach from the concrete sleeper, thereby increasing the workload of maintenance personnel. Therefore, the present application provides an elastic pad concrete sleeper structure and construction method to meet the needs. 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 rails, the rails and the concrete sleepers will be subjected to a large impact force and vibrate, and the long-term vibration connecting nuts between the rails and the concrete sleepers will loosen, causing the nuts to detach from the screw rod, resulting in the rails being detached from the concrete sleeper.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0005] A resilient pad concrete sleeper structure, comprising 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 resilient pad body, the resilient pad body being connected to the bottom and side of the concrete sleeper body for reducing ballast wear, the resilient pad body being made of polyurethane material; a docking plate, the docking plate being placed on the top of the concrete sleeper body; a fixing assembly, the fixing assembly being sleeved on the outside of the nut and being used to prevent the nut from falling off; a limiting assembly, the limiting assembly being mounted on both sides of the fixing assembly and sliding on the inside of the connecting assembly for locking the nut; a connecting assembly, the connecting assembly being arranged on both sides of the fixing assembly for docking the fixing assembly with the docking plate; wherein the fixing assembly comprises a sleeved outer portion of the nut The top of the supporting frame is connected with a reset spring and the top of the connecting frame is connected with a reset spring and the top of the connecting frame is connected with the limit plate, and the bottom of the supporting frame and the limit plate pass through the bottom of the fixing frame; the elastic sheet is initially in a state of storing power and respectively contacts with the arc block.

[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 limit gear pushes the lower end limit plate to compress the spring, so that the nut and the docking ring can rotate normally.

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

[0008] The upper end of the limit plate is meshed with the limit gear in the initial state, 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 fixedly mounted on both ends of the docking plate, docking frames are fixedly mounted on both sides of the fixed frame, the docking frames and the fixed blocks are kept vertically, a transmission rod is sleeved inside the docking frame, and a rectangular fixing rod is installed at the bottom of the transmission rod.

[0010] Optionally, 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, and the fixing rod is movably engaged in the two arc grooves. The insides of the two arc grooves are respectively fixed with limit protrusions for limiting the fixing rod.

[0011] Optionally, the limiting assembly further comprises a first limiting block installed on both sides of the limiting plate, a second limiting plate is fixedly mounted on 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 fixing rod is opened in the middle of the sliding block, the two docking frames are located in the hollow structure, and sliding grooves for the sliding block to slide are opened on opposite sides of the two docking frames.

[0013] Optionally, the sliding block has the same specifications as the interior of the docking frame, the sliding block slides inside the docking frame, and the height of the sliding block and the fixed block is consistent with the height of the interior of the docking frame.

[0014] Optionally, the docking frame is sleeved on the outside of the fixed block, the sliding block contacts the top of the fixed block, and continuously presses the fixed component downward. 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 return spring upward, so that the lower end of the limit plate engages with the outside of the limit gear.

[0015] Optionally, 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 filamentary winding structure, so that when the elastic pad concrete pillow is laid on a cement foundation, the elastic pad and cement have high bonding strength and anti-displacement performance under multiple vibration conditions.

[0016] The present invention also provides a construction method of an elastic pad concrete pillow structure, comprising the following steps:

[0017] S1. The docking frame is sleeved on the outside of the fixed block, and the transmission rod and the fixed rod respectively penetrate 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 grooves. The transmission rod and the fixed rod are rotated so that the fixed rod is engaged in the two arc grooves, and the fixed rod is limited by two limiting protrusions respectively, so that 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;

[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, and simultaneously pushes the receiving frame and the limit plate upward and compresses the reset spring, so that the lower end of the limit plate meshes with the outside of the limit gear.

[0019] S3, the elastic sheet is initially in a state of storing force, and respectively contacts the arc-shaped block, 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, and the limit plate is pushed upward through the connecting component, so that the lower end of the limit plate is engaged with the outer part 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 bevel compression spring at the lower end of the limit plate through the limit gear, so that the nut can rotate normally clockwise 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 force storage 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 outer shape of the nut and is sleeved on the outside of the nut. The limit plate is pushed upward through the connecting assembly, 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, so that the nut can 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 on the outside of the fixed block, and the transmission rod and the fixing 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 fixing rod is located in the two arc grooves, and the sliding block contacts the top of the fixed block. In the process of pressing down the fixing assembly, the sliding block goes up along the inside of the docking frame, and simultaneously pushes the receiving frame and the limit plate upward and compresses the return spring, so that the top of the second limit plate contacts the bottom of the fixed frame. When the upper end of the limit plate contacts the outside of the limit gear, the docking ring and the limit gear are limited, so that the elastic sheet is always in a force storage state, and the upper end of the limit plate is meshed with the outside of the limit gear. At this time, the rotational force applied by the elastic sheet is transmitted to the outside of the nut, and the transmission rod and the fixing rod are rotated to make the fixing rod engage in the two arc grooves. The fixing rod cooperates with the two arc grooves to fix the docking frame to the outside of the fixed block, and at the same time, the fixing assembly is fixed to the outside of the nut, so that the nut can be effectively prevented from loosening or detaching from the outside of the screw during repeated vibration through the fixing assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, further serve to explain the principles of the invention and to enable those skilled in the relevant art to make and use the invention.

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

[0027] Figure 2 It is a schematic diagram of the exploded three-dimensional structure of the elastic pad concrete pillow structure and the construction method of the fixing components and nuts;

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

[0029] Figure 4 It is a cross-sectional three-dimensional structural diagram of the elastic pad concrete pillow structure and construction method;

[0030] Figure 5 for Figure 4 A schematic diagram of the three-dimensional enlarged structure at center A;

[0031] Figure 6 It is a schematic diagram of a three-dimensional structure cut away from a top view of a fixed component;

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

[0033] Figure 8 It is a schematic diagram of a partially cutaway three-dimensional structure of a fixed component;

[0034] Fig. 9It is a schematic diagram of the three-dimensional structure of the limiting gear and the limiting component;

[0035] Fig.10 It is a schematic diagram of the cutaway three-dimensional structure of the limiting component;

[0036] Fig.11 This is a schematic diagram of the cross-section structure of the docking frame and the fixing block.

[0037] Fig.12 This is a schematic diagram of the structure in which the elastic pads are arranged on the bottom and side surfaces of the concrete sleeper body.

[0038] [reference numerals]

[0039] 1. Concrete sleeper body; 2. Rail body; 3. Fixing assembly; 31. Fixing frame; 32. Elastic sheet; 33. Connecting ring; 34. Arc block; 35. Docking ring; 36. Limiting gear; 4. Connecting assembly; 41. Docking frame; 42. Transmission rod; 43. Fixing rod; 44. Fixing block; 45. Limiting convex block; 5. Docking plate; 6. Screw; 7. Nut; 8. Limiting assembly; 81. Reset spring; 82. Limiting plate; 83. First limiting block; 84. Second limiting plate; 85. Sliding block; 86. Connecting block; 87. Receiving frame; 88. Spring; 9. Elastic pad body.

[0040] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments. DETAILED DESCRIPTION

[0041] The following is a detailed description of an elastic pad concrete pillow structure and construction method provided by the present invention in conjunction with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternative methods to implement some known technologies; and the accompanying drawings are only for a more specific description of the embodiments, and are not intended to specifically limit the present invention.

[0042] It should be noted that the references to "one embodiment", "an embodiment", "an exemplary embodiment", "some embodiments" and the like in the specification indicate that the embodiments described may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, when a specific feature, structure or characteristic is described in conjunction with an embodiment, it should be within the knowledge of a person skilled in the art to implement such feature, structure or characteristic in conjunction with other embodiments (whether or not explicitly described).

[0043] In general, a term can be understood, at least in part, from its use in context. For example, depending, at least in part, on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending, at least in part, on the context, allow for the presence of other factors that are not necessarily explicitly described.

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

[0045] Additionally, spatially relative terms such as "under," "beneath," "lower," "above," "upper," and the like may be used herein for descriptive convenience to describe the relationship of one element or feature to another element or features, as shown in the accompanying drawings. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially relative descriptors used herein may be similarly interpreted accordingly.

[0046] like Figures 1 to 11As shown, an 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, which is installed on the top of the concrete sleeper body 1 through a screw 6 and a nut 7; an elastic pad body 9, which is connected to the bottom and side of the concrete sleeper body 1 to reduce ballast wear, and the elastic pad body 9 is made of polyurethane material; a docking plate 5, which is placed on the top of the concrete sleeper body 1; a fixing component 3, which is sleeved on the outside of the nut 7 and is used to prevent the nut 7 from falling off; a limiting component 8, which 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, which 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 with 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 meshes with the limit gear 36, and a spring 88 is connected between the limit plate 82 and the receiving frame 87, and a connecting block 86 is installed on the top of the receiving frame 87, and a reset The spring 81 has its top 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 state of storing force and respectively contacts the arc block 34; the nut 7 repeatedly vibrates when the train passes by repeatedly, 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 body 2 is placed on the top of the concrete sleeper body 1 and fixed to the top of the concrete sleeper body 1 by the screw 6 and the nut 7. After the nut 7 is installed, the fixing frame 31 and the docking ring 35 are sleeved on the outside of the nut 7. The six elastic sheets 32 are initially in a power storage state and respectively contact the arc blocks 34, thereby applying a rotational force to the docking ring 35. The inner wall of the docking ring 35 is consistent with the outer shape of the nut 7 and is sleeved on the outside of the nut 7. The limit plate 82 is pushed upward through the connecting component 4, so that the lower end of the limit plate 82 is engaged with the outer side of the limit gear 36, thereby applying a rotational force to the nut 7 through the docking ring 35, thereby preventing the train from vibrating when passing through the rail body 2 and the concrete sleeper body 1, causing the screw to be deformed. The reverse rotation of the nut 7 causes the fixation of the concrete sleeper body 1 to become loose, and at the same time, the fixing frame 31 and the docking ring 35 are sleeved on the outside of the nut 7 to prevent the nut 7 from being separated from the outside of the screw 6; at the same time, the rail body 2 and the concrete sleeper body 1 continue to vibrate when the train passes, causing the nut 7 to rotate clockwise, and at the same time, the push exerted by the elastic sheet 32 ​​drives the docking ring 35 and the limit gear 36 to rotate. During the rotation process, the lower end of the limit plate 82 is engaged with the limit gear 36, so that the bevel compression spring 88 at the lower end of the limit plate 82 is pushed by the limit gear 36, so that the nut 7 can rotate clockwise normally and move down along the external thread of the screw 6, further improving the stability of the nut 7 fixing the rail body 2;

[0048] A sleeper structure with a certain elasticity is formed by pasting an elastic pad body 9 on the bottom of a concrete sleeper body 1. Laying elastic sleepers in a ballasted track structure can reduce the vibration impact of train loads on the lower track foundation and transfer the train load to a larger longitudinal range; in addition, the elastic sleepers can increase the contact area between the bottom surface of the sleeper and the ballast, thereby slowing down the ballast powdering and extending the roadbed maintenance cycle.

[0049] like Fig.12 It is a schematic diagram of the elastic pad body 9 fixed to the bottom and side surfaces of the concrete sleeper body 1. When the concrete sleeper body 1 is laid on the concrete foundation, it is sunk into the groove of the concrete foundation. The elastic pad body 9 is arranged on the side to increase the anti-displacement performance of the concrete sleeper body 1 under vibration conditions.

[0050] like Figures 6 to 10 As shown, the limit plate 82 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 82 is engaged with the limit gear 36, and the docking ring 35, the limit gear 36, the connecting ring 33 and the arc block 34 cannot rotate due to the limit of the upper end of the limit 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 Fig.11 As shown, the connecting assembly 4 includes a fixing block 44 fixedly mounted on both ends of the docking plate 5, and the docking frames 41 are fixedly mounted on both sides of the fixing frame 31. The docking frames 41 and the fixing block 44 are kept 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 combination 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 two 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 on 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 fixedly installed at the bottom of the receiving frame 87, and a sliding block 85 that slides inside the docking frame 41 is connected to the side of the receiving frame 87; a through hole that is consistent with the rectangular groove on the top of the fixing rod 43 is opened in the middle of the sliding block 85, and the two docking frames 41 are located in the 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, the sliding block 85 contacts the top of the fixed block 44, and continuously presses the fixed component 3 downward, 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 is engaged with the outside of the limit gear 36.

[0054] The docking frame 41 is sleeved on the outside of the fixed block 44, and the transmission rod 42 and the fixed rod 43 respectively penetrate the middle through hole of the sliding block 85 and the rectangular groove on the top of the fixed block 44 so that the fixed rod 43 is located in the two arc grooves, and the sliding block 85 contacts the top of the fixed block 44. In the process of pressing down the fixing component 3, the sliding block 85 goes up along the inside of the docking frame 41, and simultaneously pushes the receiving frame 87 and the limit plate 82 upward and compresses the return spring 81, so that the top of the second limit plate 84 contacts the bottom of the fixed frame 31, and when the upper end of the limit plate 82 contacts the outside of the limit gear 36, the docking ring 35 and the limit gear 36 are limited, so that the elastic sheet 32 ​​is always in a power storage state. The lower end of the limit plate 82 moves up and meshes with the outside of the limit gear 36. At this time, the rotational force applied by the elastic sheet 32 ​​to the docking ring 35 is transmitted to the outside of the nut 7; when the docking frame 41 is completely sleeved on the outside of the fixed block 44, the rotating transmission rod 42 and the fixing rod 43 are rotated to make the fixing rod 43 engage in the two arc grooves, and the fixing rod 43 cooperates with the two arc grooves and limits the fixing rod 43 by two limiting protrusions 45 respectively, the docking frame 41 can be fixed to the outside of the fixing block 44, and the fixing component 3 can be fixed to the outside of the nut 7 at the same time, so that the fixing component 3 can effectively prevent the nut 7 from loosening or detaching from the outside of the screw 6 during repeated vibrations.

[0055] The present invention also provides a construction method of an elastic pad concrete pillow structure, comprising the following steps:

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

[0057] S2, when the docking frame 41 is sleeved on the outside of the fixed block 44, the sliding block 85 contacts the top of the fixed block 44, and when the fixed assembly 3 is pressed down, the sliding block 85 moves upward along the inside of the docking frame 41, and simultaneously pushes the receiving frame 87 and the limit plate 82 upward and compresses the return spring 81, so that the lower end of the limit plate 82 is meshed with the outside of the limit gear 36;

[0058] S3, the elastic sheet 32 ​​is initially in a state of storing force, and respectively contacts the arc block 34, thereby applying a rotational force to the docking ring 35, and the inner wall of the docking ring 35 is consistent with the outer shape of the nut 7, and is sleeved on the outside of the nut 7, and the limit plate 82 is pushed upward through the connecting component 4, so that the lower end of the limit plate 82 is meshed with the outer part of the limit gear 36, thereby applying a rotational force to the nut 7 through the docking ring 35;

[0059] S4. At the same time, the rail body 2 and the concrete sleeper body 1 continue to vibrate when the train passes, causing the nut 7 to rotate clockwise. At the same time, the push exerted by the elastic sheet 32 ​​drives the docking ring 35 and the limit gear 36 to rotate. During the rotation process, the lower end of the limit plate 82 is engaged with the limit gear 36, thereby pushing the bevel compression spring 88 at the lower end of the limit plate 82 through the limit gear 36, so that the nut 7 can rotate clockwise normally and move down along the external thread of the screw 6.

[0060] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention, but those skilled in the art can fully understand the present invention without the description of these details. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0061] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An elastic pad concrete pillow structure, characterized in that: It includes 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, which is connected to the bottom and side of the concrete sleeper body and is used to reduce ballast wear, and is made of polyurethane material; A butt joint plate, the butt joint plate is placed on the 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, which is installed on both sides of the fixing assembly and slides inside the connecting assembly to lock the nut; A connecting component, which is arranged on both sides of the fixing component and is used for connecting the fixing component with the docking plate; The fixing assembly comprises 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 fixing 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 sleeved with a limiting plate meshing 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, a return spring is connected to the top of the connecting block and the top end is connected to the top of the inner wall of the fixing frame, and 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 are in contact with the arc blocks respectively.

2. The elastic pad concrete pillow structure according to claim 1 is characterized in that: The nut vibrates repeatedly when the train passes by repeatedly. 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 pad concrete pillow structure according to claim 1 is 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; The upper end of the limit plate is meshed with the limit gear in the initial state, 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 pad concrete pillow structure according to claim 1 is characterized in that: The connection assembly includes fixed blocks fixedly mounted on both ends of the docking plate, docking frames are fixedly mounted on both sides of the fixed frame, the docking frame and the fixed block are kept 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 pillow structure according to claim 4 is characterized in that: 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 insides of the two arc grooves are respectively fixed with limiting protrusions for limiting the fixing rod.

6. The elastic pad concrete pillow structure according to claim 5, characterized in that: The limiting assembly also 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 that slides inside the docking frame is connected to the side of the receiving frame.

7. The elastic pad concrete pillow 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 provided in the middle of the sliding block, and the two docking frames are located in the hollow structure. Sliding grooves for the sliding block to slide are provided on opposite sides of the two docking frames.

8. The elastic pad concrete sleeper structure according to claim 6, characterized in that: The sliding block has the same specifications as the interior of the docking frame, the sliding block slides inside the docking frame, and 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 pad concrete pillow 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 component downward, and the sliding block moves upward along the inside of the docking frame to synchronously drive the receiving frame and the limit plate to compress the return spring upward, so that the lower end of the limit plate engages with the outside of the limit gear.

10. The elastic pad concrete pillow 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 filamentary winding structure, which is convenient for laying the elastic pad concrete pillow 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 pillow structure, using the elastic pad concrete pillow structure according to any one of claims 1 to 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 penetrate 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 grooves. The transmission rod and the fixed rod are rotated so that the fixed rod is engaged in the two arc grooves, and the fixed rod is limited by two limiting protrusions respectively, so that 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, and simultaneously pushes the receiving frame and the limit plate upward and compresses the reset spring, so that the lower end of the limit plate meshes with the outside of the limit gear. S3, the elastic sheet is initially in a state of storing force, and respectively contacts the arc-shaped block, 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, and the limit plate is pushed upward through the connecting component, so that the lower end of the limit plate is engaged with the outer part 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 bevel compression spring at the lower end of the limit plate through the limit gear, so that the nut can rotate normally clockwise and move down along the external thread of the screw.

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