An automatic construction device and method for ballastless track elevation pad blocks

Abstract

This invention discloses an automatic construction device and method for ballastless track elevation pad blocks. The construction device includes a vehicle body, a control system mounted on the vehicle body, a material dispensing unit, a traveling device, a sensing device, a material flatcar, and a rotary motor. The material dispensing unit includes multiple dispensing components, each used to store elevation pad blocks of different thicknesses. A rotating component is located in the middle of the upper part of the vehicle body, and a rotary motor is installed inside the rotating component to drive its rotation. The multiple dispensing components are fixed to the outer periphery of the rotating component. This invention has a reasonable structure, simple operation, and modular design, enabling accurate and rapid distribution of specific elevation pad blocks of different specifications to corresponding sleepers. It avoids errors that occur with manual material dispensing, improves work efficiency without stopping the vehicle, reduces labor intensity, and automates the dispensing of elevation pad blocks during track laying and maintenance.

Description

Technical Field

[0001] This invention relates to the field of track construction and maintenance technology, and more specifically to a construction device and method for automatic high-speed railway ballastless track elevation pads. Background Technology

[0002] my country is a major railway country, and the track, as a crucial component of high-speed railway lines, is an integral engineering structure. In ballastless track systems, the shape of the foundation and unevenness of the ground can lead to height differences on the track. The role of ballastless track leveling blocks is to fill and adjust these height differences to maintain track flatness. Ballastless track leveling blocks also help distribute the load on the track, transferring weight to the foundation through the blocks to reduce pressure and damage to the track structure. The blocks absorb vibrations and impacts on the track, reducing the impact on trains and tracks during transportation and improving ride comfort. The initial laying and subsequent maintenance (especially during fine-tuning) involve a significant amount of adding leveling blocks. This work is usually done manually, which is inefficient, labor-intensive, prone to omissions or errors, and has a low degree of automation. Especially with the current shorter maintenance windows, there is a greater need to improve efficiency.

[0003] Therefore, we propose an automatic construction device and method for high-speed railway ballastless track elevation pads to solve the above problems. Summary of the Invention

[0004] (a) Purpose of the invention

[0005] In view of the above-mentioned defects and deficiencies of the prior art, the present invention provides a construction device and method for automatic high-speed railway ballastless track elevation pad blocks.

[0006] (II) Technical Solution

[0007] To achieve the objective of this invention, the present invention adopts the following technical solution:

[0008] An automatic construction device for ballastless track elevation blocks is characterized in that the device includes a vehicle body, a control system mounted on the vehicle body, a material feeding unit, a traveling device, a sensing device, a material flatcar, and a rotary motor; the material feeding unit includes multiple feeding components, different feeding components for storing elevation blocks of different thicknesses; a rotating component is located in the middle of the upper part of the vehicle body, and a rotary motor for driving the rotating component is located inside the rotating component; multiple feeding components are fixed on the outer periphery of the rotating component; a material flatcar is fixed at the front end of the vehicle body; the sensing device includes a first sensing component, a second sensing component, and a third sensing component, the first and third sensing components are mounted on the bottom of the vehicle body, and the first sensing component is used to detect the movement of the device. The system controls the feeding speed, the third sensing component for locating the position where the padding block needs to be laid, and the second sensing component installed at the bottom of the material cart for locating the position where the padding block needs to be laid and for measuring the thickness of the padding block to be filled. The control system is electrically connected to the feeding unit, the walking device, the sensing device, and the rotary motor. The feeding component includes a material bin and a feeding control device. The feeding control device is located at the outlet at the bottom of the material bin. A set of conveying devices is set at the corresponding position at the bottom outlet of the material bin. The conveying device includes a base, a conveying motor, and a second conveyor belt. The base is fixed on the cart body, the conveying motor is located on the lower surface of the base, and the second conveyor belt is located at the bottom outlet of the material bin. The conveying speed of the second conveyor belt is adjustable.

[0009] The material silo includes columns, telescopic rods, connecting blocks, telescopic locking blocks, and adjustable baffles. Three sides of the material silo are formed by columns, and the other side is formed by an adjustable baffle. The adjustable baffle is used to adjust the lateral space of the material silo to meet the placement requirements of elevation pads with different cross-sectional areas. A vertically arranged telescopic rod is set between two columns on one side of the material silo, and a telescopic locking block is fixed at the lower end of the telescopic rod.

[0010] The material flatcar also includes a first conveyor belt. The upper surface of the material flatcar is used to place spare elevation pads of various specifications. The first conveyor belt is used to convey the elevation pads of various specifications to the corresponding feeding components.

[0011] Furthermore, multiple sets of feeding components are evenly distributed around the outer periphery of the rotating component.

[0012] Furthermore, the conveying device also includes a rotating shaft, a second sprocket, and a second chain. The rotating shaft includes a driving shaft and a driven shaft. A second sprocket is provided on the output shaft of the conveying motor. The second sprocket and the driven sprocket are driven by a second chain. The driving shaft is a fixed shaft, and the driven shaft is an adjustable shaft. The tension of the conveyor belt is controlled by adjusting the driven shaft.

[0013] Furthermore, the material flatcar includes guardrails, a flatbed, and front wheels. The second sensing component is disposed on the lower end face of the flatbed, the front wheels are fixed below the flatbed, and guardrails are provided around the upper side of the flatbed. The space enclosed by the guardrails is used to store spare elevation pads of various specifications.

[0014] Furthermore, the front wheels are configured as drive wheels.

[0015] Furthermore, the walking device includes a walking wheel motor, a driving walking wheel, and a driven walking wheel located in the middle of the vehicle body. A first sprocket is provided on both the output shaft and the transmission shaft of the walking wheel motor. The two first sprockets are connected by a first chain drive. There is no drive connection between the driving walking wheel and the driven walking wheel.

[0016] Furthermore, the driven wheel is equipped with a braking device.

[0017] A construction method for an automated ballastless track elevation pad, the method using an automated ballastless track elevation pad construction device, characterized by comprising the following steps:

[0018] S1. Place the construction device for the automatic ballastless track elevation pad on the track, and send a command to the traveling device through the control system to move the construction device;

[0019] S2. When the second sensing component installed at the bottom of the material flatcar identifies the location where pad blocks need to be laid, the second sensing component is also used to measure the total thickness of the pad blocks to be filled and feed the total thickness data back to the control system.

[0020] S3. The control system calculates the optimal arrangement of pads of different thicknesses placed in each feeding component based on the total thickness data. The optimal arrangement here refers to the arrangement with the fewest pads while meeting the total thickness requirement. When there are multiple arrangement schemes with the fewest elevation pads, the arrangement scheme with the closest elevation of the feeding components is selected.

[0021] S4. Based on the optimal arrangement scheme calculated in step S3, the control system controls the extension distance of the telescopic rod in the corresponding material bin and extends the telescopic block to limit the elevation pad in the corresponding material bin. The control system controls the rotary motor to drive the rotating component to rotate, rotating the corresponding material bin to the top of the conveying device. The unloading control device is opened, and the elevation pad located below the telescopic block falls from the material bin outlet onto the conveying device. The rotary motor is rotated repeatedly, and the unloading control device is opened again, until all the elevation pads corresponding to the optimal arrangement scheme calculated in step S3 have fallen onto the conveying device.

[0022] S5: When the third sensor component detects and locates the position where the pad block needs to be laid, the first sensor component simultaneously detects the vehicle's speed. When the error between the vehicle's speed and the rated speed is within a threshold range, the second conveyor belt is started at a specified speed. The coordination between the vehicle's rated speed and the second conveyor belt's specified speed ensures that the elevation pad block on the conveyor device is thrown to the vicinity of the corresponding pad block laying position. When the error between the vehicle's speed and the rated speed exceeds the threshold range, the speed at which the elevation pad block is thrown is controlled by adjusting the speed of the second conveyor belt.

[0023] S6. Repeat steps S2-S5 until the material distribution task for this section of elevation pad blocks is completed.

[0024] Further, in step S4, the process of controlling the unloading of elevation pads in the material bin is as follows: When one elevation pad needs to be unloaded, the extension length of the telescopic rod is controlled by the control system so that the telescopic latch at the bottom of the telescopic rod corresponds to the height of the second-to-last elevation pad. Then, the telescopic latch extends, limiting the second-to-last elevation pad. At this time, the unloading control device is opened, and the bottom elevation pad will fall from the discharge port of the material bin. After the unloading operation is completed, the unloading control device is closed, and the telescopic latch and telescopic rod are retracted in sequence. When two elevation pads need to be unloaded, the extension length of the telescopic rod is controlled by the control system so that the telescopic latch at the bottom of the telescopic rod corresponds to the height of the third-to-last elevation pad. Then, the telescopic latch extends, limiting the second-to-last elevation pad. At this time, the unloading control device is opened, and the bottom two elevation pads will fall from the discharge port of the material bin.

[0025] Furthermore, when the number of elevation pads in the material bin is insufficient, spare elevation pads are replenished to the corresponding material bin via the first conveyor belt.

[0026] (III) Technical Effects

[0027] Compared with the prior art, the present invention has the following beneficial and significant technical effects:

[0028] 1. This invention has a reasonable structure, simple operation, and modular design, which can accurately and quickly distribute specific elevation pads of different specifications to the corresponding sleepers, avoiding errors that occur with manual material distribution. It improves work efficiency and reduces labor intensity by operating without stopping the train, and automates the distribution of elevation pads during track laying and maintenance. This invention also takes into account both elevation detection and the corresponding distribution of elevation pads, improving the accuracy of elevation adjustment and greatly reducing the construction process and steps.

[0029] 2. Due to factors such as road undulations, turns, and changes in vehicle load, vehicle speed may become unstable during actual operation. When the vehicle speed is too high or too low, the placement of the elevation pads will deviate significantly during non-stop operation. Due to the large load on the vehicle, the vehicle speed adjustment requires a certain process. When the error between the vehicle's travel speed and the rated travel speed exceeds a certain threshold, the speed of the elevation pads can be controlled by adjusting the speed of the second conveyor belt. Compared to controlling the vehicle speed, the second conveyor belt speed adjustment is faster and more accurate.

[0030] 3. By combining the telescopic rod, telescopic clamp, and feeding control device, multiple pad blocks can be fed and counted simultaneously, which solves the problem of long feeding time in the existing technology where pad blocks are fed and counted one by one by setting a counter at the discharge port. Attached Figure Description

[0031] Figure 1 This is a front view of the construction device for automatic ballastless track elevation pads;

[0032] Figure 2 This is a left view of the construction device for automatic ballastless track elevation pads;

[0033] Figure 3 This is a schematic diagram of the traveling device of the construction equipment for automatic ballastless track elevation pads;

[0034] Figure 4 This is a schematic diagram of the material feeding unit of the construction device for automatic ballastless track elevation pad blocks. Detailed Implementation

[0035] To better understand the present invention, the following embodiments further illustrate its content. Throughout the accompanying drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions. The described embodiments are some, but not all, of the embodiments of the present invention. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. The structure and technical solutions of the present invention will be further described in detail below with reference to the accompanying drawings, providing one embodiment of the present invention.

[0036] Figure 1-4An automatic ballastless track elevation block construction device is shown. The device includes a vehicle body 1, a control system 2 mounted on the vehicle body, a material dispensing unit 3, a traveling device 4, a sensing device 5, a material flatcar 6, and a rotary motor 7. The control system 2 is equipped with a display device 21. The material dispensing unit 3 includes multiple dispensing components 31, each used to store elevation blocks of different thicknesses. A rotating component 11 is located at the middle of the upper part of the vehicle body 1, and a rotary motor 7 is installed inside the rotating component 11 to drive its rotation. The multiple dispensing components 31 are fixed to the outer periphery of the rotating component 11. More specifically, the multiple dispensing components 31 are evenly distributed around the outer periphery of the rotating component 11, with different dispensing components corresponding to elevation blocks of different thicknesses. A material flatcar 6 is fixed to the front end of the 1. The sensing device 5 includes a first sensing component 51, a second sensing component 52, and a third sensing component 53. The first sensing component 51 and the third sensing component 53 are installed at the bottom of the 1. The first sensing component 51 is used to detect the speed of the 1. The third sensing component 53 is used to locate the position where the padding block needs to be laid. The second sensing component 52 is installed at the bottom of the material flatcar 6 and is used to locate the position where the padding block needs to be laid and to measure the thickness of the padding block to be filled. The control system 2 is electrically connected to the feeding unit 3, the traveling device 4, and the sensing device 5. The control system 2 controls the travel direction and travel speed adjustment of the traveling device 4. When the control system 2 receives the sensing signal from the sensing device 5, it controls the feeding unit 3 to feed the material one pad at a time. The material flatcar 6 includes guardrails 61, a flat plate 62, front wheels 63, and a first conveyor belt (not shown in the figure). The second sensing component 52 is set on the lower end face of the flat plate 62, and the front wheels 63 are fixed below the flat plate 62. Depending on the needs of use, the front wheels can also be set as drive wheels. Guardrails 61 are set around the upper side of the flat plate 62. The space enclosed by the guardrails is used to store spare elevation pads of various specifications. The first conveyor belt is used to transport elevation pads of various specifications to the corresponding feeding components.

[0037] Figure 3 The specific structure of the walking device is shown. The walking device 4 includes a walking wheel motor 41, a driving walking wheel 42, and a driven walking wheel 43, which are located in the middle of the vehicle body 1. A first sprocket 44 is provided on both the output shaft and the transmission shaft 46 of the walking wheel motor 41. The two first sprockets 44 are connected by a first chain 45. There is no transmission connection between the driving walking wheel 42 and the driven walking wheel 43, so they can accurately cooperate with the track. The driven walking wheel 43 is equipped with a brake device 47.

[0038] As attached Figure 4As shown, the feeding assembly 31 includes a material bin 32 and a feeding control device 34. The feeding control device 34 is located at the outlet at the bottom of the material bin 32. A set of conveying devices 33 is located at the bottom outlet of the material bin 32. The conveying device 33 includes a base 331, a conveying motor 332, a rotating shaft 333, a second conveyor belt 334, a second sprocket 335, and a second chain 336. The rotating shaft 333 includes a drive shaft and a driven shaft 338. The base 331 is fixed on the vehicle body 1. The conveying motor 332 is located on the lower surface of the base 331. The second conveyor belt 334 is located at the bottom outlet of the material bin 32. The second sprocket 335 is located on the output shaft of the conveying motor 332. The second sprocket 335 and the driven sprocket 337 are driven by the second chain 336. The drive shaft is a fixed shaft, and the driven shaft is an adjustable shaft. The tension of the conveyor belt is controlled by adjusting the driven shaft. The transmission direction of the second conveyor belt 334 is opposite to the forward direction of the walking device.

[0039] Appendix Figure 4 The specific structure of the material silo is also shown. The material silo 32 includes a column 323, a telescopic rod 322, a telescopic locking block 324, and an adjustable baffle 325. Three sides of the material silo are formed by the column 323, and the other side is formed by the adjustable baffle 325. The adjustable baffle 325 is used to adjust the lateral space of the material silo to meet the placement requirements of elevation pads with different cross-sectional areas. A vertically arranged telescopic rod 322 is set between two columns 323 on one side of the material silo, and a telescopic locking block 324 is fixed at the lower end of the telescopic rod 322. The process of controlling the unloading of elevation pads in the material silo is as follows: When one elevation pad needs to be unloaded, the extension length of the telescopic rod 322 is controlled by the control system 2, so that the telescopic latch at the bottom of the telescopic rod corresponds to the height of the second-to-last elevation pad. Then, the telescopic latch extends, limiting the second-to-last elevation pad. At this time, the unloading control device 34 is opened, and the bottom elevation pad will fall from the discharge port of the material silo. After the unloading operation is completed, the unloading control device 34 is closed, and the telescopic latch and telescopic rod are retracted in sequence. Similarly, when two elevation pads need to be unloaded, the extension length of the telescopic rod 322 is controlled by the control system 2, so that the telescopic latch at the bottom of the telescopic rod corresponds to the height of the third-to-last elevation pad. Then, the telescopic latch extends, limiting the second-to-last elevation pad. At this time, the unloading control device 34 is opened, and the bottom two elevation pads will fall from the discharge port of the material silo. By combining the telescopic rod, telescopic clamp, and feeding control device, multiple pad blocks can be fed and counted simultaneously, which solves the problem of long feeding time in the existing technology where pad blocks are fed and counted one by one by setting a counter at the discharge port.

[0040] A construction method for an automated ballastless track elevation pad, specifically, is as follows:

[0041] S1. Place the construction device for the automatic ballastless track elevation pad on the track, and send a command to the traveling wheel motor through the control system 2 to move the construction device;

[0042] S2 When the second sensing component 52 installed at the bottom of the material flatcar 6 identifies the position for locating the padding block to be laid, it measures the total thickness of the padding block to be filled and feeds the total thickness data back to the control system 2.

[0043] S3. The control system 2 calculates the optimal arrangement of pads of different thicknesses placed in each feeding component 31 based on the total thickness data. Here, the optimal arrangement refers to the arrangement that minimizes the number of pads while still meeting the total thickness requirement. As one implementation, the number of feeding components 31 is set to 6. For ease of explanation, these 6 feeding components are referred to as Feeding Component 1 (containing elevation pads with a thickness of 14mm), Feeding Component 2 (containing elevation pads with a thickness of 12mm), Feeding Component 3 (containing elevation pads with a thickness of 10mm), and Feeding Component 4 (containing elevation pads with a thickness of 10mm). The six material feeding components are arranged sequentially around the outer perimeter of the rotating component: 1) Elevation pad, 2) Feeding component 4 (holding elevation pads with a thickness of 8), 3) Feeding component 5 (holding elevation pads with a thickness of 6), and 4) Feeding component 6 (holding elevation pads with a thickness of 1). For example, if the total thickness is 13, one elevation pad is needed from each of feeding components 2 and 6 and fed to the track (this scheme is 12+1=13). Alternatively, if the total thickness is 12, one elevation pad is needed from each feeding component and fed to the track.

[0044] When multiple arrangements of elevation pads with the minimum number of blocks exist, the arrangement closest to the material feeding components is selected. For example, if the measured total thickness is 22, then the 14+8 and 12+10 arrangements both have the minimum number of blocks. The 10+12 arrangement is chosen because the distance between material feeding components three and four is less than the distance between material feeding components one and four. Choosing the 12+10 arrangement further reduces the rotation distance of rotating parts and the rotary motor, maximizing energy and time savings. Similarly, if the measured total thickness is 20, then the 14+6, 12+8, and 10+10 arrangements all have the minimum number of blocks. The 10+10 arrangement (i.e., obtaining two elevation pads with a thickness of 10 from material feeding component three) is chosen as the optimal arrangement because this method only requires one rotation.

[0045] S4. Based on the optimal arrangement scheme calculated in step S3, the control system 2 controls the extension distance of the telescopic rod 322 in the corresponding material bin, and extends the telescopic block 324 to limit the elevation pad in the corresponding material bin. The control system controls the rotary motor 7 to drive the rotating component to rotate, rotating the corresponding material bin above the conveying device 33. The unloading control device 34 is opened, and the elevation pad located below the telescopic block 324 falls from the material bin outlet onto the conveying device. The rotary motor is rotated repeatedly, and the corresponding unloading control device is opened, until all the elevation pads corresponding to the optimal arrangement scheme calculated in step S3 fall onto the conveying device.

[0046] S5: When the third sensor component 53 detects and locates the position where the pad blocks need to be laid, the first sensor component 51 simultaneously detects the vehicle's speed. When the error between the vehicle's speed and the rated speed is within 10%, the second conveyor belt is started at the specified speed. The coordination between the vehicle's rated speed and the second conveyor belt's specified speed ensures that the elevation pad blocks on the conveyor device are delivered to the vicinity of the corresponding pad block laying position. This non-stop method achieves the distribution of elevation pad blocks at each node, greatly improving the efficiency and accuracy of elevation pad block distribution. However, due to road undulations... Factors such as turning, changes in vehicle load, and other factors can cause unstable vehicle speed during actual operation. When the vehicle speed is too high or too low, the placement of the elevation blocks will deviate significantly during non-stop operation. Due to the heavy load on the vehicle, speed adjustment requires a certain process. When the error between the vehicle's travel speed and the rated travel speed exceeds 10%, the speed of the elevation blocks is controlled by adjusting the speed of the second conveyor belt. Compared to controlling the vehicle speed, the second conveyor belt's speed adjustment is faster and more precise. Because the second conveyor belt's conveying direction is different from the vehicle's forward direction, for example, when the vehicle speed is too high, the second conveyor belt's speed is increased; when the vehicle speed is too low, the second conveyor belt's speed is decreased, keeping the elevation block placement speed relatively stable and improving the accuracy of elevation block placement.

[0047] S6. Repeat steps S2-S5 until the material distribution task for this section of elevation pad blocks is completed.

[0048] In step S4, when the number of elevation pads in the material bin is insufficient, the spare elevation pads are replenished to the corresponding material bin via the first conveyor belt.

[0049] The objectives of this invention have been fully and effectively achieved through the above embodiments. Those skilled in the art will understand that this invention includes, but is not limited to, the contents described in the accompanying drawings and the specific embodiments described above. Although the invention has been described with reference to what is currently considered the most practical and preferred embodiments, it should be understood that the invention is not limited to the disclosed embodiments, and any modifications that do not depart from the functional and structural principles of the invention will be included within the scope of the claims.

Claims

1. A construction device of an automatic ballastless track elevation pad, characterized in that, The construction device includes a vehicle body, a control system mounted on the vehicle body, a material dispensing unit, a traveling device, a sensing device, a material flatcar, and a rotary motor. The material dispensing unit includes multiple dispensing components, each used to store elevation blocks of different thicknesses. A rotating component is located in the middle of the upper part of the vehicle body, and a rotary motor is installed inside the rotating component to drive its rotation. Multiple dispensing components are fixed to the outer periphery of the rotating component. A material flatcar is fixed to the front end of the vehicle body. The sensing device includes a first sensing component, a second sensing component, and a third sensing component. The first and third sensing components are installed at the bottom of the vehicle body. The first sensing component is used to detect the speed of the device's movement, and the third sensing component is used to locate the position where the blocks need to be laid. The second sensing component is installed at the bottom of the material flatcar and is used to locate the position where the blocks need to be laid and to measure the thickness of the blocks to be filled. The control system is electrically connected to the material dispensing unit, the traveling device, the sensing device, and the rotary motor. The material dispensing assembly includes a material bin and a material feeding control device. The material feeding control device is located at the outlet at the bottom of the material bin. A set of conveying devices is set at the corresponding position at the bottom outlet of the material bin. The conveying devices include a base, a conveying motor, and a second conveyor belt. The base is fixed to the vehicle body, the conveying motor is located on the lower surface of the base, and the second conveyor belt is located at the bottom outlet of the material bin. The conveying speed of the second conveyor belt is adjustable. The control system is used to calculate the optimal arrangement of elevation blocks of different thicknesses based on the thickness data detected by the second sensing component, and to control the rotary motor to drive the rotating component to rotate, rotating the material dispensing assembly containing the elevation blocks of the corresponding specifications above the conveying device. The control system is also used to adjust the conveying speed of the second conveyor belt in real time based on the vehicle body travel speed detected by the first sensing component, thereby controlling the speed at which the elevation blocks are thrown out by adjusting the speed of the second conveyor belt. The material silo includes columns, telescopic rods, connecting blocks, telescopic locking blocks, and adjustable baffles. Three sides of the material silo are formed by columns, and the other side is formed by an adjustable baffle. The adjustable baffle is used to adjust the lateral space of the material silo to meet the placement requirements of elevation pads with different cross-sectional areas. A vertically arranged telescopic rod is set between two columns on one side of the material silo, and a telescopic locking block is fixed at the lower end of the telescopic rod. The material flatcar also includes a first conveyor belt. The upper surface of the material flatcar is used to place spare elevation pads of various specifications. The first conveyor belt is used to convey the elevation pads of various specifications to the corresponding feeding components.

2. The automatic construction device for track bed fastener of ballastless track elevation cushion block according to claim 1, characterized in that, Multiple material feeding components are evenly distributed around the outer periphery of the rotating component.

3. The automatic construction device for track bed fastener of ballastless track elevation cushion block according to claim 1, characterized in that, The conveying device also includes a rotating shaft, a second sprocket, and a second chain. The rotating shaft includes a driving shaft and a driven shaft. A second sprocket is provided on the output shaft of the conveying motor. The second sprocket and the driven sprocket are driven by a second chain. The driving shaft is a fixed shaft, and the driven shaft is an adjustable shaft. Adjusting the driven shaft controls the tension of the conveyor belt.

4. The construction device for automatic ballastless track elevation pads according to claim 1, characterized in that, The material flatcar includes guardrails, a flatbed, and front wheels. The second sensing component is located on the lower end of the flatbed, and the front wheels are fixed below the flatbed. Guardrails are provided around the upper side of the flatbed, and the space enclosed by the guardrails is used to store spare elevation pads of various specifications.

5. The construction device for automatic ballastless track elevation pads according to claim 4, characterized in that, The front wheels are set as drive wheels.

6. The construction device for automatic ballastless track elevation pads according to claim 1, characterized in that, The walking device includes a walking wheel motor, a driving walking wheel, and a driven walking wheel, all located in the middle of the vehicle body. A first sprocket is provided on both the output shaft and the transmission shaft of the walking wheel motor. The two first sprockets are connected by a first chain drive. There is no drive connection between the driving walking wheel and the driven walking wheel.

7. The construction device for automatic ballastless track elevation pads according to claim 6, characterized in that, The driven wheels are equipped with a braking device.

8. A construction method for an automatic ballastless track elevation pad, the method using a construction device for an automatic ballastless track elevation pad as described in any one of claims 1-7, characterized in that, The method includes the following steps: S1. Place the construction device for the automatic ballastless track elevation pad on the track, and send a command to the traveling device through the control system to move the construction device; S2. When the second sensing component installed at the bottom of the material flatcar identifies the location where pad blocks need to be laid, the second sensing component is also used to measure the total thickness of the pad blocks to be filled and feed the total thickness data back to the control system. S3. The control system calculates the optimal arrangement of pads of different thicknesses placed in each feeding component based on the total thickness data. The optimal arrangement here refers to the arrangement with the fewest pads while meeting the total thickness requirement. When there are multiple arrangement schemes with the fewest elevation pads, the arrangement scheme with the closest elevation of the feeding components is selected. S4. Based on the optimal arrangement scheme calculated in step S3, the control system controls the extension distance of the telescopic rod in the corresponding material bin and extends the telescopic block to limit the elevation pad in the corresponding material bin. The control system controls the rotary motor to drive the rotating component to rotate, rotating the corresponding material bin to the top of the conveying device. The unloading control device is opened, and the elevation pad located below the telescopic block falls from the material bin outlet onto the conveying device. The rotary motor is rotated repeatedly, and the unloading control device is opened again, until all the elevation pads corresponding to the optimal arrangement scheme calculated in step S3 have fallen onto the conveying device. S5: When the third sensor component detects and locates the position where the pad block needs to be laid, the first sensor component simultaneously detects the vehicle's speed. When the error between the vehicle's speed and the rated speed is within a threshold range, the second conveyor belt is started at a specified speed. The coordination between the vehicle's rated speed and the second conveyor belt's specified speed ensures that the elevation pad block on the conveyor device is thrown to the vicinity of the corresponding pad block laying position. When the error between the vehicle's speed and the rated speed exceeds the threshold range, the speed at which the elevation pad block is thrown is controlled by adjusting the speed of the second conveyor belt. S6. Repeat steps S2-S5 until the material distribution task for this section of elevation pad blocks is completed.

9. The construction method of the automatic ballastless track elevation pad according to claim 8, characterized in that, In step S4, the process of controlling the unloading of elevation pads in the material bin is as follows: When one elevation pad needs to be unloaded, the extension length of the telescopic rod is controlled by the control system so that the telescopic latch at the bottom of the telescopic rod corresponds to the height of the second-to-last elevation pad. Then, the telescopic latch extends, limiting the second-to-last elevation pad. At this time, the unloading control device is opened, and the bottom elevation pad will fall from the discharge port of the material bin. After the unloading operation is completed, the unloading control device is closed, and the telescopic latch and telescopic rod are retracted in sequence. When two elevation pads need to be unloaded, the extension length of the telescopic rod is controlled by the control system so that the telescopic latch at the bottom of the telescopic rod corresponds to the height of the third-to-last elevation pad. Then, the telescopic latch extends, limiting the second-to-last elevation pad. At this time, the unloading control device is opened, and the bottom two elevation pads will fall from the discharge port of the material bin.

10. The construction method of the automatic ballastless track elevation pad according to claim 8, characterized in that, When the number of elevation pads in the material bin is insufficient, the spare elevation pads are replenished to the corresponding material bin via the first conveyor belt.

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