Rail tie conveying device and automatic conveying method thereof

Abstract

The present application provides a sleeper conveying device and an automatic conveying method thereof, and relates to the field of railway track laying technology. The sleeper conveying device comprises a sleeper track transport vehicle, a vehicle-mounted gantry crane, a lifting frame, a rotating cushion block mechanism and a cushion block clamping mechanism. Sleepers are stacked in multiple layers in the vertical direction on the sleeper track transport vehicle, and a cushion block is arranged between adjacent two layers of sleepers. The vehicle-mounted gantry crane is movably arranged above the sleeper track transport vehicle. The lifting frame is connected below the vehicle-mounted gantry crane. A clamp is arranged on the lifting frame. The rotating cushion block mechanism is installed on the lifting frame, and each rotating cushion block mechanism comprises a swingable supporting cushion block. Two rows of cushion block clamping mechanisms are installed on the lifting frame, and each cushion block clamping mechanism comprises a clamping jaw that can be opened and closed. The supporting cushion block of the rotating cushion block mechanism can be switched between a first position and a second position, so that the lifting frame can automatically adjust the supporting mode according to the number of layers of sleepers to be taken, thereby solving the technical problem that the existing fixed cushion block cannot adapt to different numbers of layers of sleepers to be taken, and improving the degree of automation of the operation.

Description

Technical Field

[0001] This invention relates to the field of railway track laying technology, and more specifically, to a sleeper conveying device and its automatic conveying method. Background Technology

[0002] Sleeper transport is a crucial step in railway track laying. In existing CPG500 track-laying units, sleepers are typically transported via sleeper transport vehicles, and then lifted layer by layer by an onboard gantry crane and transported to the track-laying location. However, the existing technology has the following problems: Firstly, on the sleeper transport vehicle, sleepers are stacked in multiple layers vertically, with wooden blocks laid between adjacent layers for isolation and support. When lifting the first layer of sleepers, the existing vehicle-mounted gantry crane needs to precisely align its frame with the sleeper's rail support groove; however, when lifting the second to fourth layers, the crane needs to avoid the upper wooden blocks and support itself directly on them. Existing cranes typically use a fixed wooden block structure, which cannot automatically switch support states according to the number of layers being lifted. This necessitates manual replacement or adjustment of the wooden blocks when lifting different layers, resulting in cumbersome and inefficient operations.

[0003] Secondly, when hoisting the second to fourth layers of sleepers, the wooden blocks between the two layers of sleepers must be removed first; otherwise, the lower sleepers cannot be clamped. The current method relies on manual removal of these wooden blocks, which is labor-intensive and affects operational efficiency. Summary of the Invention

[0004] The problem solved by this invention is that when the existing gantry crane lifts sleepers from different layers, it is necessary to manually replace or adjust the position of the pads, which is cumbersome and inefficient. In addition, the existing operation method relies on manual removal of the pads, which is labor-intensive and affects the efficiency of the operation.

[0005] To address the above problems, the present invention provides a sleeper conveying device and a conveying method thereof.

[0006] In a first aspect, the present invention provides a sleeper conveying device, including a sleeper transport vehicle, a vehicle-mounted gantry crane, a hanger, at least two rows of rotating pad block mechanisms, and at least two rows of pad clamping mechanisms.

[0007] The sleeper transport vehicle is set on long steel rails and is used to transport sleepers. The sleepers are stacked in multiple layers vertically on the sleeper transport vehicle, and wooden blocks are placed between adjacent layers of sleepers. The vehicle-mounted gantry crane can be movably installed above the sleeper rail transport vehicle; The hanger is connected to the bottom of the vehicle-mounted gantry crane; the hanger is equipped with clamps for lifting the entire layer of sleepers; The rotating pad mechanism is mounted on the hanger, and each rotating pad mechanism includes a swingable support pad. Two rows of wooden block clamping mechanisms are installed on the hanger, each wooden block clamping mechanism including an openable and closable gripper; Among them, the vehicle-mounted gantry crane is used to drive the lifting frame to move; the support block of the rotating block mechanism is configured to swing between a first position and a second position; in the first position, the support block is used to support the rail bearing groove of the sleeper to be lifted; in the second position, the support block avoids the lower block or sleeper; the jaws of the block clamping mechanism are configured to move between a clamping position and a releasing position; in the clamping position, the jaws are used to clamp the block.

[0008] The beneficial effects of the sleeper conveying device of the present invention are: By setting up a rotating pad mechanism and a timber clamping mechanism and integrating them onto the same hanger, the following beneficial effects are achieved: The supporting pads of the rotating pad mechanism can switch between a first position and a second position, allowing the hanger to automatically adjust the support method according to the number of sleeper layers to be retrieved. This solves the technical problem that existing fixed timbers cannot adapt to different layers of sleeper retrieval and improves the degree of automation. The clamps of the timber clamping mechanism can automatically clamp the timbers, realizing mechanized timber recycling, replacing manual timber unloading, reducing labor intensity, and eliminating the safety hazards of scattered timber stacking. Integrating the rotating pad mechanism and the timber clamping mechanism onto the same hanger allows the sleeper retrieval and timber recycling processes to be completed on the same equipment and in the same work cycle, reducing the number of equipment and working time, and improving overall work efficiency. Setting up at least two rows of rotating pad mechanisms and at least two rows of timber clamping mechanisms, with multiple supporting pads and multiple clamps spaced along the length of the sleeper, achieves multi-point support and multi-point clamping of long strip sleepers and timbers, ensuring the stability of retrieval and clamping.

[0009] Optionally, the sleeper transport vehicle is also equipped with a sleeper collection box, which is used to store the sleepers recovered by the sleeper clamping mechanism.

[0010] Optionally, the rotating pad mechanism includes a bearing, a rotating shaft, and a drive assembly.

[0011] The bearing seat is fixedly connected to the hanger; The rotating shaft is rotatably mounted on the shaft seat; one end of the support pad is fixedly connected to the rotating shaft; The drive assembly is connected to the rotating shaft and is used to drive the rotating shaft to rotate, thereby causing the support pad to swing between the first position and the second position.

[0012] Optionally, the drive assembly includes a drive element, a rack, and a gear; the drive element is mounted on the hanger; the drive element is connected to the rack for driving the rack to reciprocate linearly; the gear is fixedly connected to the rotating shaft and meshes with the rack.

[0013] Optionally, the pad clamping mechanism includes a mounting base and a scissor telescopic assembly.

[0014] The mounting base is fixedly connected to the hanger; The scissor telescopic assembly is installed on the mounting base, and its end is connected to the gripper. When the scissor telescopic component extends, it drives the grippers to approach and clamp the pad wood from both sides; when the scissor telescopic component retracts, it drives the grippers to release the pad wood.

[0015] Optionally, the scissor telescopic assembly includes a second drive assembly, a horizontal scissor linkage assembly, and a vertical scissor linkage assembly; the horizontal scissor linkage assembly is installed on the mounting base, with one end connected to the second drive assembly and the other end connected to the top of the vertical scissor linkage assembly; the gripper is fixedly installed at the bottom of the vertical scissor linkage assembly; the second drive assembly is installed on the mounting base and is used to drive the gripper to clamp or release the wooden block.

[0016] Optionally, the horizontal scissor linkage assembly includes two first links and two second links; the two first links are arranged crosswise and hinged at the middle by a first pin; the first pin is fixedly connected to the mounting base; one end of each of the two second links is hinged, and the other end is respectively hinged to one end of each of the two first links; the vertical scissor linkage assembly includes a third link and a fourth link; the third link and the fourth link are arranged crosswise and hinged at the middle by a second pin; the second pin is fixedly connected to the mounting base; an adjustment groove is provided at the end of each of the first links away from the second links; the ends of the third and fourth links closer to the first links are slidably disposed in the two adjustment grooves respectively.

[0017] Optionally, at least two rows of rotating pad mechanisms are arranged at intervals along the width direction of the sleeper transport vehicle; multiple support pads in the same row of rotating pad mechanisms are arranged at intervals along the length direction of the sleeper transport vehicle to jointly support the rail bearing groove of the same sleeper.

[0018] Optionally, at least two rows of wooden block clamping mechanisms are arranged at intervals along the width direction of the sleeper rail transport vehicle; multiple clamps in the same row of wooden block clamping mechanisms are arranged at intervals along the length direction of the sleeper rail transport vehicle to jointly clamp the same wooden block.

[0019] Secondly, the present invention provides an automatic conveying method based on a sleeper conveying device, comprising the following steps: Step 1: Control the support block of the rotating pad mechanism to swing to the first position; Step 2: The vehicle-mounted gantry crane lowers the lifting frame so that the support pads support the rail grooves of the first layer of sleepers to be lifted, and the support pads are used to position the sleepers. Step 3: Use the clamps of the hanger to pick up the sleeper on the current floor, and then use the vehicle-mounted gantry crane to transport the picked-up sleeper to the target location for storage. Step 4: Control the support block of the rotating pad mechanism to swing to the second position; Step 5: The vehicle-mounted gantry crane moves the lifting frame back to above the sleeper to be lifted, and controls the lifting frame to descend so that the lifting frame is supported on the wooden block above the uppermost sleeper to be lifted. Step 6: Make the hanger clamps grab the sleeper of the current layer, and at the same time, control the jaws of the pad clamping mechanism to grab the pad. Step 7: First, use the vehicle-mounted gantry crane to transport the clamped sleepers to the target location for storage; then use the vehicle-mounted gantry crane to transport the clamped wooden blocks to the wooden block collection box, and control the clamping jaws of the wooden block clamping mechanism to release the wooden blocks. Step 8: Repeat steps 5-7 until all the sleepers to be lifted on the sleeper transport vehicle are transported to the target location for storage. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the sleeper conveying device in an embodiment of the present invention; Figure 2 This is a schematic diagram of the sleeper transport vehicle carrying sleepers in an embodiment of the present invention; Figure 3 This is a top view of the sleeper rail transport vehicle in an embodiment of the present invention; Figure 4 This is a schematic diagram of the layout of the railway sleepers in an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of the hanger in an embodiment of the present invention; Figure 6 This is a schematic diagram of the rotating pad mechanism in an embodiment of the present invention; Figure 7 This is a schematic diagram of the scissor-type telescopic component in an embodiment of the present invention; Figure 8 for Figure 5 Top view; Figure 9 for Figure 8 Enlarged view of the structure at point B; Figure 10 for Figure 8 Cross-sectional view of AA.

[0021] Explanation of reference numerals in the attached figures: 1. Rail sleeper transport vehicle; 2. Vehicle-mounted gantry crane; 3. Rail sleeper; 301. Rail support groove; 4. Timber pad; 5. Timber pad collection box; 6. Hanger; 7. Rotating pad mechanism; 71. Drive assembly one; 711. Drive component; 712. Rack; 713. Gear; 72. Rotating shaft; 73. Shaft seat; 74. Support pad; 8. Timber pad clamping mechanism; 81. Mounting base; 82. Scissor telescopic assembly; 821. Horizontal scissor linkage assembly; 8211. First linkage; 82111. Adjustment groove; 8212. First pin; 8213. Second linkage; 822. Vertical scissor linkage assembly; 8221. Third linkage; 8222. Second pin; 8223. Fourth linkage; 823. Drive assembly two; 84. Gripper; 9. Fixture. Detailed Implementation

[0022] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Although some embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the accompanying drawings and embodiments of the present invention are for illustrative purposes only and are not intended to limit the scope of protection of the present invention.

[0023] The term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to"; the term "based on" means "at least partially based on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments"; and the term "optionally" means "optional embodiments". Definitions of other terms will be given in the description below. It should be noted that the concepts of "first," "second," etc., mentioned in this invention are used only to distinguish different devices, modules, or units, and are not intended to limit the order of functions performed by these devices, modules, or units or their interdependencies.

[0024] It should be noted that the terms "a" and "a plurality of" used in this invention are illustrative rather than restrictive. Those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0025] like Figure 1-10As shown in the figure, an embodiment of the present invention provides a sleeper conveying device, including a sleeper transport vehicle 1, a vehicle-mounted gantry crane 2, a lifting frame 6, at least two rows of rotating pad block mechanisms 7, and at least two rows of wooden block clamping mechanisms 8. The sleeper transport vehicle 1 is mounted on long steel rails and is used to transport sleepers 3. The sleepers 3 are stacked in multiple layers vertically on the sleeper transport vehicle 1, and wooden blocks 4 are provided between adjacent layers of sleepers 3. The vehicle-mounted gantry crane 2 is movably mounted above the sleeper transport vehicle 1. The lifting frame 6 is connected below the vehicle-mounted gantry crane 2. The lifting frame 6 is provided with clamps 9 for lifting entire layers of sleepers 3. The rotating pad block mechanisms 7 are mounted on the lifting frame 6, and each rotating pad block mechanism 7 includes a swingable support pad 74. The two rows of wooden block clamping mechanisms 8 are mounted on the lifting frame 6, and each wooden block clamping mechanism 8... Includes an openable gripper 824; wherein, the vehicle-mounted gantry crane 2 is used to move the lifting frame 6; the support block 74 of the rotating block mechanism 7 is configured to swing between a first position and a second position; in the first position, the support block 74 is used to support the rail groove 301 of the sleeper 3 to be lifted; in the second position, the support block 74 avoids the underlying block 4 or sleeper 3; the gripper 824 of the block clamping mechanism 8 is configured to move between a clamping position and a releasing position; in the clamping position, the gripper 824 is used to clamp the block 4.

[0026] In this embodiment, four layers of sleepers 3 are stacked vertically. Two wooden blocks 4 are laid between two adjacent layers of sleepers 3, extending along the length of the sleepers 3 to isolate and support the upper and lower layers of sleepers 3. The sleeper transport vehicle 1 travels along the railway track to transport the sleepers 3 from the storage yard to the track laying location.

[0027] Specifically, the vehicle-mounted gantry crane 2 travels along the length of the sleeper transport vehicle 1. Its traveling mechanism adopts a rail-type or wheel-type structure and is driven by a motor. The vehicle-mounted gantry crane 2 serves as the lifting power source, driving the lifting frame 6 to move horizontally and vertically. The lifting frame 6 is connected below the vehicle-mounted gantry crane 2 and moves synchronously with it. The lifting frame 6 is equipped with a clamp 9, which is used to clamp an entire layer of sleepers 3. The clamp 9 can be an existing sleeper 3-specific clamp 9, and its structure is the same as existing technology.

[0028] In this embodiment, two rows of rotating pad mechanisms 7 are provided, spaced apart along the width direction of the sleeper transport vehicle 1. Each row of rotating pad mechanisms 7 includes multiple rotating pad mechanisms 7 spaced apart along the length direction of the sleeper transport vehicle 1. Each rotating pad mechanism 7 includes a swingable support pad 74. The support pad 74 can swing between a first position and a second position. When the support pad 74 is in the first position, its end extends downward to support the rail bearing groove 301 of the sleeper 3 to be lifted; when the support pad 74 is in the second position, it retracts upward to avoid the lower pad 4 or sleeper 3.

[0029] In this embodiment, two rows of wooden block clamping mechanisms 8 are provided, spaced apart along the width direction of the sleeper rail transport vehicle 1. Each row of wooden block clamping mechanisms 8 includes multiple wooden block clamping mechanisms 8 spaced apart along the length direction of the sleeper rail transport vehicle 1. Each wooden block clamping mechanism 8 includes an openable and closable gripper 824. The gripper 824 is operable between a clamping position and a releasing position. When the gripper 824 is in the clamping position, it clamps the wooden block 4 from both sides; when the gripper 824 is in the releasing position, it releases the wooden block 4.

[0030] This embodiment achieves the following beneficial effects by setting up a rotating pad mechanism 7 and a pad clamping mechanism 8, and integrating them onto the same hanger 6: The supporting pad 74 of the rotating pad mechanism 7 can switch between a first position and a second position, allowing the hanger 6 to automatically adjust the support method according to the number of pillow layers to be removed, solving the technical problem that the existing fixed pad 4 cannot adapt to different numbers of pillow layers, and improving the degree of automation of the operation; The clamping jaws 824 of the pad clamping mechanism 8 can automatically clamp the pad 4, realizing the mechanized recycling of the pad 4, replacing the manual unloading of the pad 4, reducing labor intensity, and eliminating... In addition to eliminating the safety hazards of scattered stacked sleeper blocks 4, the rotating pad block mechanism 7 and the sleeper block clamping mechanism 8 are integrated on the same hanger 6, so that the two processes of lifting sleeper 3 and recycling sleeper blocks 4 can be completed on the same equipment and in the same work cycle, reducing the number of equipment and working time, and improving the overall work efficiency. At least two rows of rotating pad block mechanisms 7 and at least two rows of sleeper block clamping mechanisms 8 are set up so that multiple support pad blocks 74 and multiple clamping claws 824 are arranged at intervals along the length of sleeper 3, realizing multi-point support and multi-point clamping of long sleeper 3 and sleeper blocks 4, ensuring the stability of lifting and clamping.

[0031] Optionally, please combine Figure 3 The sleeper rail transport vehicle 1 is also equipped with a sleeper collection box 5, which is used to store the sleepers 4 recovered by the sleeper clamping mechanism 8.

[0032] Specifically, based on the above embodiment, the sleeper transport vehicle 1 is also equipped with a timber collection box 5. The timber collection box 5 is fixedly installed at the front or rear end of the sleeper transport vehicle 1, with its opening facing upwards, for storing the timber 4 recovered by the timber clamping mechanism 8. The size of the timber collection box 5 is designed to accommodate all the timber 4. The location of the timber collection box 5 should facilitate the release of the timber 4 by the grippers 824 of the timber clamping mechanism 8. In this embodiment, the timber collection box 5 is located on the first two carriages of the sleeper transport vehicle 1, close to the working area of ​​the gantry 6, reducing the transport path of the timber 4.

[0033] By setting up a wooden block collection box 5, the recycled wooden blocks 4 are stored in a centralized manner, which avoids the wooden blocks 4 being scattered and piled up on the sleeper transport vehicle 1 or next to the track, eliminates safety hazards, and keeps the construction site clean and orderly. The location of the wooden block collection box 5 has been optimized to shorten the conveying path of the wooden block clamping mechanism 8 and improve the recycling efficiency of the wooden blocks 4. The centrally stored wooden blocks 4 are convenient for subsequent unified handling and reuse, reducing secondary handling costs.

[0034] Optionally, please combine Figure 5-6 The rotating pad mechanism 7 includes a bearing seat 73, a rotating shaft 72, and a drive assembly 71. The bearing seat 73 is fixedly connected to the hanger 6; the rotating shaft 72 is rotatably mounted on the bearing seat 73; one end of the support pad 74 is fixedly connected to the rotating shaft 72; the drive assembly 71 is connected to the rotating shaft 72 and is used to drive the rotating shaft 72 to rotate, thereby causing the support pad 74 to swing between a first position and a second position.

[0035] Specifically, the bearing seat 73 is fixedly connected to the bottom surface of the hanger 6. In this embodiment, the bearing seat 73 has a U-shaped or box-shaped structure, with coaxial mounting holes on both side walls. The bearing seat 73 is fixed to the hanger 6 by bolts or welding to ensure its relative position with the hanger 6 is stable. The two ends of the rotating shaft 72 are mounted in the mounting holes on both side walls of the bearing seat 73 by bearings, allowing the rotating shaft 72 to rotate freely around its own axis. The axis of the rotating shaft 72 is set in the horizontal direction, parallel or perpendicular to the length direction of the sleeper 3, depending on the structure of the hanger 6. The support pad 74 is L-shaped or straight, with one end fixed to the rotating shaft 72 by key connection, welding, or integral molding. When the rotating shaft 72 rotates, the support pad 74 swings synchronously with the rotating shaft 72. The drive assembly 71 can take various forms, such as direct motor drive, hydraulic drive, or pneumatic drive. When the drive component 71 is activated, the rotating shaft 72 rotates around its axis by a predetermined angle, thereby causing the support pad 74 to swing between the first position and the second position.

[0036] The swing motion of the support pad 74 is achieved through the cooperation of the bearing seat 73, the rotating shaft 72, the support pad 74, and the drive assembly 71. The structure is simple and the transmission is reliable. The rotating shaft 72 is installed in the bearing seat 73 through bearings, which reduces the rotational resistance and improves the swing accuracy and service life. The support pad 74 is fixedly connected to the rotating shaft 72, and the two move synchronously without transmission gap, which ensures the accuracy of the support position. The structure has a high degree of modularity and is easy to install, maintain and replace.

[0037] Optionally, drive assembly 71 includes a drive member 711, a rack 712, and a gear 713; the drive member 711 is mounted on the hanger 6; the drive member 711 is connected to the rack 712 and is used to drive the rack 712 to reciprocate linearly; the gear 713 is fixedly connected to the rotating shaft 72 and meshes with the rack 712.

[0038] Based on the above embodiments, the drive assembly 71 adopts a gear 713 and rack 712 transmission method. The drive component 711 is a hydraulic cylinder or a pneumatic cylinder, the cylinder body of which is fixed to the hanger 6, and the piston rod extends and retracts in a linear direction. The drive component 711 can also be an electric push rod or a linear motor. The rack 712 is connected to the piston rod of the drive component 711 and is driven by the drive component 711 to perform linear reciprocating motion. To ensure the smoothness of the rack 712's movement, a sliding track can also be provided on the hanger 6, and the rack 712 is slidably disposed in the sliding track. The gear 713 is fixedly connected to the rotating shaft 72 and meshes with the rack 712. The gear 713 and the rotating shaft 72 are fixed by a key connection or interference fit to ensure that the two rotate synchronously. When the drive component 711 drives the rack 712 to move linearly, the rack 712 drives the gear 713 to rotate, the gear 713 drives the rotating shaft 72 to rotate, and thus drives the support pad 74 to swing. The swing angle of the support pad 74 can be precisely controlled by controlling the extension and retraction stroke of the drive component 711.

[0039] By employing a gear 713 and rack 712 transmission method, the linear motion of the driving component 711 is converted into the rotational motion of the rotating shaft 72, resulting in high transmission efficiency and high precision. The gear 713 and rack 712 transmission has a self-locking characteristic, so when the driving component 711 stops moving, the support pad 74 can remain in a predetermined position without the need for an additional locking device. The stroke of the rack 712 is linearly related to the rotation angle of the gear 713, making it easy to precisely control the swing angle of the support pad 74 by controlling the stroke of the driving component 711. This transmission method has a compact structure, occupies little space, and is suitable for arrangement within the limited space of the hanger 6.

[0040] Optionally, please combine Figure 7-10 The wood pad clamping mechanism 8 includes a mounting base 81 and a scissor telescopic assembly 82. The mounting base 81 is fixedly connected to the hanger 6; the scissor telescopic assembly 82 is mounted on the mounting base 81 and its end is connected to the gripper 824; when the scissor telescopic assembly 82 extends, it drives the gripper 824 to approach and clamp the wood pad 4 from both sides; when the scissor telescopic assembly 82 retracts, it drives the gripper 824 to release the wood pad 4.

[0041] Specifically, the mounting base 81 is a plate-like or frame structure, fixed to the hanger 6 by bolts or welding. The mounting base 81 provides the mounting foundation and support for the scissor telescopic assembly 82. The scissor telescopic assembly 82 is composed of multiple connecting rods that are cross-hinged, and can extend and retract in a horizontal or vertical direction. When the scissor telescopic assembly 82 extends, its ends open to both sides, causing the grippers 824 to approach the pad 4 from both sides and finally clamp the pad 4. When the scissor telescopic assembly 82 retracts, its ends move towards the center, causing the grippers 824 to release the pad 4.

[0042] The extension and retraction of the scissor telescopic assembly 82 are driven by a second drive assembly 823. The second drive assembly 823 can be a hydraulic cylinder, a pneumatic cylinder, or a motor, which is connected to the input end of the scissor telescopic assembly 82 to provide driving force.

[0043] The clamping and releasing of the gripper 824 is achieved by extending and retracting the scissor telescopic component 82. The structure is compact and has a large telescopic ratio. During the extension process, the movement trajectory of the gripper 824 is linear or nearly linear, which makes it easy for the gripper 824 to accurately align with both sides of the pad 4. The scissor telescopic component 82 has strong rigidity and large clamping force, which can stably clamp the heavy pad 4. The mechanism operates smoothly and with low impact, making it suitable for high-frequency, repetitive pad 4 clamping operations.

[0044] Optionally, the scissor telescopic assembly 82 includes a second drive assembly 823, a horizontal scissor linkage assembly 821, and a vertical scissor linkage assembly 822; the horizontal scissor linkage assembly 821 is mounted on the mounting base 81, with one end connected to the second drive assembly 823 and the other end connected to the top end of the vertical scissor linkage assembly 822; the gripper 824 is fixedly mounted on the bottom end of the vertical scissor linkage assembly 822; the drive assembly is mounted on the mounting base 81 and is used to drive the gripper 824 to clamp or release the wooden block 4.

[0045] Specifically, the horizontal scissor linkage assembly 821 is mounted on the mounting base 81 and is composed of multiple horizontally arranged links hinged together. One end of the horizontal scissor linkage assembly 821 is connected to the drive assembly 823 to receive driving force; its other end is connected to the top end of the vertical scissor linkage assembly 822 to drive the vertical scissor linkage assembly 822 to move up and down. The vertical scissor linkage assembly 822 is composed of multiple vertically arranged links hinged together. The top end of the vertical scissor linkage assembly 822 is connected to the end of the horizontal scissor linkage assembly 821, and a gripper 824 is fixedly mounted on its bottom end. The drive assembly 823 is mounted on the mounting base 81 and is used to provide driving force. In this embodiment, the drive assembly 823 is a hydraulic cylinder or a pneumatic cylinder, and its piston rod is connected to the input end of the horizontal scissor linkage assembly 821.

[0046] When drive assembly 823 extends the horizontal scissor linkage assembly 821, the horizontal scissor linkage assembly 821 pushes the vertical scissor linkage assembly 822 downwards. Simultaneously, the vertical scissor linkage assembly 822 itself extends downwards, causing the grippers 824 to descend to both sides of the wooden block 4 and clamp down. When drive assembly 823 retracts the horizontal scissor linkage assembly 821, the horizontal scissor linkage assembly 821 pulls the vertical scissor linkage assembly 822 upwards, causing the grippers 824 to rise and release the wooden block 4.

[0047] The gripper 824 achieves its grasping action through the cooperation of the horizontal scissor linkage assembly 821 and the vertical scissor linkage assembly 822. The horizontal scissor linkage assembly 821 provides horizontal driving force, while the vertical scissor linkage assembly 822 converts the horizontal motion into vertical motion. The two work together and have a large extension range, which can adapt to the gripping needs of wooden blocks 4 of different thicknesses.

[0048] Optionally, the horizontal scissor linkage assembly 821 includes two first links 8211 and two second links 8213; the two first links 8211 are arranged crosswise and hinged at the middle by a first pin 8212; the first pin 8212 is fixedly connected to the mounting base 81; one end of each of the two second links 8213 is hinged, and the other end is respectively hinged to one end of each of the two first links 8211; the vertical scissor linkage assembly 822 includes a third link 8221. The fourth link 8223 and the third link 8221 and the fourth link 8223 are arranged in a cross pattern and are hinged in the middle by the second pin 8222; the second pin 8222 is fixedly connected to the mounting base 81; the end of the first link 8211 away from the second link 8213 is provided with an adjustment groove 82111; the ends of the third link 8221 and the fourth link 8223 near the first link 8211 are respectively slidably arranged in the two adjustment grooves 82111.

[0049] Specifically, the horizontal scissor linkage assembly 821 includes two first linkages 8211 and two second linkages 8213. The two first linkages 8211 are arranged crosswise and hinged at the middle by a first pin 8212 to form an X-shaped structure. The first pin 8212 is fixedly connected to the mounting base 81, allowing the two first linkages 8211 to rotate relative to each other around the first pin 8212.

[0050] Two second connecting rods 8213 are hinged at one end to each other, and their other ends are respectively hinged to one end of two first connecting rods 8211. Specifically, the left second connecting rod 8213 is hinged to the end of the left first connecting rod 8211, and the right second connecting rod 8213 is hinged to the end of the right first connecting rod 8211. When the drive assembly 823 pushes the hinge point of the second connecting rod 8213, the two second connecting rods 8213 open, causing the two first connecting rods 8211 to rotate around the first pin 8212, thereby extending or retracting the horizontal scissor linkage assembly 821 as a whole.

[0051] The vertical scissor linkage assembly 822 includes a third link 8221 and a fourth link 8223. The third link 8221 and the fourth link 8223 are arranged in a crisscross pattern and hinged at the middle by a second pin 8222, forming an X-shaped structure. The second pin 8222 is fixedly connected to the mounting base 81, allowing the third link 8221 and the fourth link 8223 to rotate relative to each other around the second pin 8222.

[0052] An adjustment groove 82111 is provided at the end of the first connecting rod 8211 away from the second connecting rod 8213. The adjustment groove 82111 is a long strip-shaped sliding groove that extends along the length of the first connecting rod 8211. The ends of the third connecting rod 8221 and the fourth connecting rod 8223 near the first connecting rod 8211 are respectively slidably disposed in the two adjustment grooves 82111, that is, the top end of the third connecting rod 8221 is slidably disposed in the adjustment groove 82111 of the left first connecting rod 8211, and the top end of the fourth connecting rod 8223 is slidably disposed in the adjustment groove 82111 of the right first connecting rod 8211.

[0053] When the horizontal scissor linkage assembly 821 extends, the two adjusting slots 82111 move to both sides, causing the top ends of the third link 8221 and the fourth link 8223 to slide to both sides. At the same time, the third link 8221 and the fourth link 8223 rotate around the second pin 8222, and their bottom ends move downward and come closer to each other, thereby causing the gripper 824 to descend and clamp the pad 4. When the horizontal scissor linkage assembly 821 retracts, the action is reversed.

[0054] By adjusting the groove 82111, a sliding connection is achieved between the horizontal scissor linkage assembly 821 and the vertical scissor linkage assembly 822, allowing them to slide relative to each other and avoiding motion interference. The adjusting groove 82111 allows the top end of the vertical scissor linkage assembly 822 to slide horizontally, thereby converting the opening / closing motion of the horizontal scissor linkage assembly 821 into the lowering / raising motion of the vertical scissor linkage assembly 822, resulting in smooth motion conversion. The structure is simple and compact, with few parts, and is easy to process and assemble. By adjusting the length of the adjusting groove 82111, the lifting stroke of the vertical scissor linkage assembly 822 can be changed, thus adapting to different thicknesses of the pad 4.

[0055] Optionally, at least two rows of rotating pad mechanisms 7 are arranged at intervals along the width direction of the sleeper transport vehicle 1; multiple support pads 74 in the same row of rotating pad mechanisms 7 are arranged at intervals along the length direction of the sleeper transport vehicle 1 to jointly support the rail bearing groove 301 of the same sleeper 3.

[0056] Based on the above embodiments, the rotating pad mechanism 7 adopts a multi-row, multi-column layout.

[0057] Specifically, at least two rows of rotating pad mechanisms 7 are arranged at intervals along the width direction of the sleeper transport vehicle 1. In this embodiment, two rows of rotating pad mechanisms 7 are provided, corresponding to the positions of the rail bearing grooves 301 on both sides of the sleeper 3. Each row of rotating pad mechanisms 7 includes multiple rotating pad mechanisms 7 arranged at intervals along the length direction of the sleeper transport vehicle 1.

[0058] The sleeper 3 typically has two rail-supporting grooves 301, located near both ends of the sleeper 3. Therefore, the positions of the two rows of rotating pad mechanisms 7 correspond to the two rail-supporting grooves 301 of the sleeper 3. Multiple support pads 74 in the same row are arranged at intervals along the length of the sleeper 3 to jointly support the same side rail-supporting groove 301 of the same sleeper 3. Since the length of a sleeper 3 is relatively long, a single support pad 74 cannot provide stable support; therefore, multiple support pads 74 are needed to be arranged at intervals along the length to share the load.

[0059] In this embodiment, four rotating pad mechanisms 7 are provided in each row, meaning that each sleeper 3 is supported by eight support pads 74. The spacing between the support pads 74 is determined according to the structure and mechanical requirements of the rail bearing groove 301 of the sleeper 3, ensuring uniform load distribution.

[0060] By adopting a multi-row, multi-column layout, multiple support pads 74 jointly support the same sleeper 3, resulting in uniform load distribution, avoiding local stress concentration, and improving the stability of the lifting process. The two rows of rotating pad mechanisms 7 correspond to the two rail bearing grooves 301 of the sleeper 3, which conforms to the structural characteristics of the sleeper 3 and achieves precise matching with the rail bearing grooves 301. The multiple support pads 74 are arranged at intervals along the length direction, overcoming the problem that a single support point cannot stably support a long strip sleeper 3, ensuring that the sleeper 3 does not tilt or sway during the lifting process. This layout is modular, and the number and interval of the rotating pad mechanisms 7 can be flexibly adjusted according to the length and weight of the sleeper 3.

[0061] Optionally, at least two rows of wooden block clamping mechanisms 8 are arranged at intervals along the width direction of the sleeper rail transport vehicle 1; multiple grippers 824 in the same row of wooden block clamping mechanisms 8 are arranged at intervals along the length direction of the sleeper rail transport vehicle 1 to jointly clamp the same wooden block 4.

[0062] Based on the above embodiments, the pad clamping mechanism 8 also adopts a multi-row, multi-column layout.

[0063] Specifically, at least two rows of wooden block clamping mechanisms 8 are arranged at intervals along the width direction of the sleeper transport vehicle 1. In this embodiment, two rows of wooden block clamping mechanisms 8 are provided, each corresponding to the position of a wooden block 4. Since two wooden blocks 4 are laid on each layer of sleepers 3, located on both sides of the sleeper 3, the two rows of wooden block clamping mechanisms 8 are used to clamp the left and right wooden blocks 4 respectively.

[0064] Multiple jaws 824 in the same row of pad clamping mechanism 8 are arranged at intervals along the length of the sleeper transport vehicle 1 to jointly clamp the same pad 4. The length of the pad 4 is similar to the length of the sleeper 3, and the pad 4 is a long strip of wood. A single jaw 824 cannot clamp it stably, so multiple jaws 824 need to be arranged at intervals along the length to clamp it together.

[0065] In this embodiment, four wooden block clamping mechanisms 8 are provided in each row, that is, each wooden block 4 is clamped by four clamping claws 824. The spacing between the clamping claws 824 is determined according to the rigidity and mechanical requirements of the wooden block 4 to ensure that the clamping force is evenly distributed and to prevent the wooden block 4 from bending or slipping during the lifting process.

[0066] By adopting a multi-row, multi-column layout, multiple grippers 824 jointly grip the same log 4, resulting in a uniform distribution of clamping force and preventing the log 4 from bending, deforming, or slipping during the lifting process. The two rows of log gripping mechanisms 8 correspond to two logs 4 respectively, which conforms to the actual conditions of the construction site and enables the simultaneous gripping of two logs 4, improving work efficiency. The multiple grippers 824 are arranged at intervals along the length direction, overcoming the problem that a single gripper 824 cannot stably grip long strip logs 4, ensuring the reliability of the log 4 recovery process. This layout corresponds to the layout of the rotating pad mechanism 7, forming a symmetrical structure that ensures the hanger 6 is subjected to balanced forces.

[0067] This invention also provides an automatic sleeper conveying method based on the above-mentioned sleeper conveying device, comprising the following steps: Step 1: Control the support block 74 of the rotating block mechanism 7 to swing to the first position; Step 2: The vehicle-mounted gantry crane 2 controls the lifting frame 6 to descend, so that the support pad 74 supports the rail groove 301 of the first layer of sleepers to be lifted and positioned by the support of the support pad 74; Step 3: Use the clamps 9 of the hanger 6 to grab the sleeper 3 of the current layer, and then use the vehicle-mounted gantry crane 2 to transport the grabbed sleeper 3 to the target location for storage. Step 4: Control the support pad 74 of the rotating pad mechanism 7 to swing to the second position; Step 5: The vehicle-mounted gantry crane 2 drives the lifting frame 6 to return to the position above the sleeper 3 to be lifted, and controls the lifting frame 6 to descend so that the lifting frame 6 is supported on the wooden block 4 above the uppermost sleeper 3 to be lifted. Step 6: The clamp 9 of the hanger 6 clamps the sleeper 3 of the current layer, and at the same time, the jaws 824 of the pad clamping mechanism 8 are controlled to clamp the pad 4. Step 7: First, use the vehicle-mounted gantry crane 2 to transport the clamped sleeper 3 to the target location for storage; then use the vehicle-mounted gantry crane 2 to transport the clamped wooden block 4 to the wooden block collection box 5, and control the clamping jaw 824 of the wooden block clamping mechanism 8 to release the wooden block 4. Step 8: Repeat steps 5-7 until all the sleepers 3 to be lifted on the sleeper transport vehicle 1 are transported to the target location for storage.

[0068] Specifically, in the initial state: four layers of sleepers 3 are stacked on the sleeper transport car 1, and two wooden blocks 4 are laid on each layer of sleepers 3. The gantry 6 is located above the sleeper transport car 1 and is in a standby position.

[0069] Step 1: The control system issues a command to control the drive component 71 of the rotating pad mechanism 7 to move, driving the support pad 74 to swing to the first position. At this time, the support pad 74 extends downward, and its end is aligned with the rail bearing groove 301 of the sleeper 3.

[0070] Step 2: The control system controls the movement of the vehicle-mounted gantry crane 2, causing the gantry crane 6 to descend. When the gantry crane 6 descends to the predetermined height, the end of the support block 74 first contacts and supports itself in the rail groove 301 of the first layer of sleepers 3. The supporting action of the support block 74 ensures that the gantry crane 6 is precisely positioned relative to the sleepers 3, ensuring that the clamps 9 on the gantry crane 6 are accurately aligned with the sleepers 3.

[0071] Step 3: The control system controls the clamps 9 on the gantry crane 6 to close, gripping the first layer of sleepers 3. After the clamps 9 are clamped, the vehicle-mounted gantry crane 2 drives the gantry crane 6 to rise, lifting the gripped sleeper 3 from the sleeper transport vehicle 1, and then moving it horizontally to the track laying position, placing the sleeper 3 in the target location. At this point, the transport of the first layer of sleepers 3 is complete.

[0072] Step 4: The control system controls the support block 74 of the rotating block mechanism 7 to swing to the second position. At this time, the support block 74 retracts upward, avoiding the space under the hanger 6, preparing for the subsequent lifting of the second layer of sleepers 3.

[0073] Step 5: The vehicle-mounted gantry crane 2 moves the lifting frame 6 back to above the sleeper transport vehicle 1, aligning it with the remaining sleepers 3. The control system controls the lifting frame 6 to descend. At this time, since the support pad 74 is already in the second position, the bottom surface of the lifting frame 6 is directly supported on the wooden block 4 above the current uppermost sleeper 3.

[0074] Step Six: The control system simultaneously issues two commands: first, it controls the clamps 9 on the hanger 6 to close, gripping the sleeper 3 on the current level; second, it controls the drive component 823 of the sleeper clamping mechanism 8 to actuate, causing the scissor telescopic component 82 to extend, driving the grippers 824 to approach and clamp the sleeper 4 from both sides. At this time, the sleeper 3 and the sleeper 4 are clamped simultaneously.

[0075] Step 7: The control system prioritizes the transport of sleeper 3: The vehicle-mounted gantry crane 2 raises the lifting frame 6, transporting the gripped sleeper 3 to the target location for storage. After the sleeper 3 is released, the vehicle-mounted gantry crane 2 again moves the lifting frame 6 to the timber collection box 5. Then, the control system controls the jaws 824 of the timber gripping mechanism 8 to release, releasing the timber 4 into the timber collection box 5. At this point, a complete "sleeper 3 + timber 4" transport and recycling cycle is completed.

[0076] Step 8: Repeat steps 5 through 7 to sequentially lift the third and fourth layers of sleepers 3 and their corresponding wooden blocks 4. Each time a layer is completed, the number of sleeper layers 3 on the sleeper transport vehicle 1 decreases by one. Once the fourth layer of sleepers 3 and their wooden blocks 4 have been transported and retrieved, all sleepers 3 to be lifted on the sleeper transport vehicle 1 are transported to the target location, and the operation is complete.

[0077] This method achieves precise positioning and hoisting of the first layer of sleepers 3 through steps one to three, and synchronous hoisting and retrieval of subsequent layers of sleepers 3 and wooden blocks 4 through steps four to seven, forming a complete automated operation process. Steps one and four control the support block 74 to swing to the first and second positions respectively, realizing the automatic switching of the support mode of the hanger 6 without manual intervention. Step six realizes the synchronous hoisting of sleepers 3 and wooden blocks 4, reducing operation time and improving efficiency. Step seven adopts the "sleepers 3 first, wooden blocks 4 later" conveying sequence, prioritizing the supply of sleepers 3 for track laying operations, while simultaneously completing the retrieval of wooden blocks 4, without interference between the two. Through the cyclic control in step eight, this method realizes the fully automated conveying and retrieval of all sleepers 3 and wooden blocks 4 on the entire sleeper transport vehicle 1, completely replacing manual operation.

[0078] Specific application example: Collaborative automated conveying operation using two vehicle-mounted gantry cranes The following uses the CPG500 track-laying unit as an example to illustrate the specific automated operation process of the sleeper conveying device in unmanned driving mode described in this embodiment. In this application example, the sleeper transport vehicle 1 consists of thirty-seven flatbed cars. The sleepers are stacked on the first 31 flatbed cars, with four layers of sleepers stacked, numbered from car 1 to car 31. Each layer of sleepers in each car corresponds to two wooden blocks. Two vehicle-mounted gantry cranes are provided, namely the first vehicle-mounted gantry crane and the second vehicle-mounted gantry crane. Both vehicle-mounted gantry cranes are equipped with the aforementioned lifting frame, rotating pad mechanism, and wooden block clamping mechanism. The two vehicle-mounted gantry cranes interact with the host control system in real time via a wireless communication system.

[0079] Initial state: The track-laying machine and the sleeper transport train are in place. The control system completes a self-check, confirming that the running rails are free of obstructions, the connection between the power vehicle's bridge and the main unit's bridge is intact, and the power systems of all equipment are functioning normally. The travel locking devices of the two vehicle-mounted gantry cranes automatically unlock, entering standby mode.

[0080] Phase 1: Sleeper Retrieval and Transportation for the First Layer of Track The control system automatically activates the second vehicle-mounted gantry crane according to the track-laying progress. The second vehicle-mounted gantry crane travels at a low speed (not exceeding 5 km / h) along the sleeper transport car 1 towards car 31. LiDAR and obstacle avoidance sensors along its path detect obstacles in real time to ensure safe operation. Upon reaching car 31, the rotating pad mechanism on its crane automatically swings to the first position (spin-out state), with the support pad resting in the rail-bearing groove of the fourth layer of sleepers on car 31. The crane lowers, the clamps pick up the fourth layer of sleepers, and after confirming a secure clamp, lifts them to a safe height. It then returns along sleeper transport car 1, transporting the sleepers to the track-laying position. Simultaneously, the first vehicle-mounted gantry crane remains in standby mode, maintaining a preset safe distance (equivalent to the distance between two or more flatbed trucks) from the second vehicle-mounted gantry crane.

[0081] After the second gantry crane completes the transport of the fourth layer of sleepers in car 31, it automatically returns to car 31 and takes the third, second, and first layers of sleepers in sequence until all the sleepers in car 31 are taken.

[0082] Phase Two: Collaborative Conveying and Timber Recycling Using Dual-Vehicle Gantry Cranes When the track-laying operation enters the stage of laying the first and second pairs of rails, the control system activates the first vehicle-mounted gantry crane. The first vehicle-mounted gantry crane travels to the area of ​​cars 1 to 10, specifically responsible for lifting the fourth layer of sleepers in this area. At this time, the second vehicle-mounted gantry crane is responsible for transferring the sleepers from the rear area (cars 15 to 31) to the fourth layer position of cars 1 to 10 to supplement the sleeper lifting needs of the first vehicle-mounted gantry crane.

[0083] During the transfer process, the second gantry crane lowers its frame to the position where the sleepers are to be retrieved, with its rotating pad mechanism in the second position (rotating state), and the bottom of the frame directly supported on the sleeper blocks. While the second gantry crane's clamps pick up the lower layer of sleepers, its sleeper block picking mechanism simultaneously picks up the upper sleeper blocks. Subsequently, the second gantry crane first transports the sleepers to the target position (the fourth empty space in cars 1 to 10), and then transports the sleeper blocks to the sleeper block collection box at the front of the sleeper transport car 1 for release. The first gantry crane continuously retrieves sleepers from the area of ​​cars 1 to 10, with the same operating procedure as the second gantry crane. However, the rotating pad mechanism of the first gantry crane is in the first position when retrieving the first layer of sleepers, and in the second position when retrieving subsequent layers.

[0084] The relative positions of the two truck-mounted gantry cranes are monitored and scheduled in real time by the control system. When the two truck-mounted gantry cranes approach each other, the control system automatically adjusts the travel speed of one of the gantry cranes or pauses it to wait, based on a preset safe distance (equivalent to the distance between two or more flatbed trucks), to avoid collisions. For example, when the first truck-mounted gantry crane moves towards the overlapping area of ​​trucks 13 to 16, the control system automatically controls the second truck-mounted gantry crane to stop in a specific waiting area (such as at truck 18). The second truck-mounted gantry crane can only enter the work area after the first truck-mounted gantry crane has completed picking up the sleeper and left the overlapping area.

[0085] Phase 3: Single-vehicle gantry crane completes subsequent track laying. When the track-laying operation enters the stage of laying the fourth pair of rails, the control system, according to a preset strategy, shuts down the second gantry crane, allowing the first gantry crane to handle the remaining sleeper transport alone. The first gantry crane retrieves sleepers one by one, layer by layer, from the first to the tenth car. Simultaneously, it picks up the corresponding sleeper blocks at each layer and transports them to the sleeper block collection box. The first gantry crane's travel speed, sleeper retrieval position, and sleeper block recovery path are all automatically planned and controlled by the control system.

[0086] Security protection mechanism During the aforementioned automated operation, the control system monitors the following safety conditions in real time: whether there are foreign objects or obstacles on the running track (detected by lidar and track obstacle avoidance sensors); whether the relative distance between the two vehicle-mounted gantry cranes is less than the safety threshold; whether the clamps are fully clamped to the sleepers (detected by clamping status sensors); whether the jaws of the sleeper clamping mechanism accurately clamp the sleepers (detected by position sensors); and whether the lifting height has reached the safe height (detected by height sensors). If any safety condition is not met, the control system automatically issues an alarm and stops the relevant equipment. Operation will automatically resume after the fault is cleared.

[0087] Through the above-mentioned automated operation examples, the sleeper conveying device described in this embodiment realizes fully unmanned operation from sleeper picking, conveying, and sleeper recovery to safety protection, completely replacing manual operation and significantly improving the efficiency and safety of track laying operations.

[0088] While the present invention has been disclosed above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the scope of protection of the present invention.

Claims

1. A sleeper conveying device, comprising: The sleeper transport vehicle (1) is set on long steel rails for transporting sleepers (3). The sleepers (3) are stacked in multiple layers in the vertical direction on the sleeper transport vehicle (1), and wooden blocks (4) are provided between two adjacent layers of sleepers (3). A vehicle-mounted gantry crane (2) is movably mounted above the sleeper rail transport vehicle (1); Its characteristic is that it further includes: A gantry crane (6) is connected to the vehicle-mounted gantry crane (2) below; the gantry crane (6) is equipped with a clamp (9) for lifting the entire layer of sleepers (3); At least two rows of rotating pad mechanisms (7) are mounted on the hanger (6), each rotating pad mechanism (7) including a swingable support pad (74); and At least two rows of pad clamping mechanisms (8) are mounted on the hanger (6), each pad clamping mechanism (8) including an openable gripper (824). The vehicle-mounted gantry crane (2) is used to move the lifting frame (6); the support block (74) of the rotating block mechanism (7) is configured to swing between a first position and a second position; in the first position, the support block (74) is used to support the rail groove (301) of the sleeper (3) to be lifted; in the second position, the support block (74) avoids the lower pad (4) or sleeper (3); the jaw (824) of the pad clamping mechanism (8) is configured to move between a clamping position and a releasing position; in the clamping position, the jaw (824) is used to clamp the pad (4).

2. The sleeper conveying device according to claim 1, characterized in that, The sleeper rail transport vehicle (1) is also equipped with a sleeper collection box (5), which is used to store the sleepers (4) recovered by the sleeper clamping mechanism (8).

3. The sleeper conveying device according to claim 1, characterized in that, The rotating pad mechanism (7) includes: A bearing seat (73) is fixedly connected to the hanger (6); A rotating shaft (72) is rotatably mounted on the bearing seat (73); one end of the support pad (74) is fixedly connected to the rotating shaft (72); and A drive component (71) is connected to the rotating shaft (72) and is used to drive the rotating shaft (72) to rotate, thereby causing the support pad (74) to swing between the first position and the second position.

4. The sleeper conveying device according to claim 3, characterized in that, The drive assembly (71) includes a drive member (711), a rack (712), and a gear (713); the drive member (711) is mounted on the hanger (6); the drive member (711) is connected to the rack (712) and is used to drive the rack (712) to reciprocate linearly; the gear (713) is fixedly connected to the rotating shaft (72) and meshes with the rack (712).

5. The sleeper conveying device according to claim 1, characterized in that, The wood clamping mechanism (8) includes: Mounting base (81), which is fixedly connected to the hanger (6); and A scissor telescopic assembly (82) is mounted on the mounting base (81) and its end is connected to the gripper (824); When the scissor telescopic component (82) extends, it drives the gripper (824) to approach and clamp the pad (4) from both sides; when the scissor telescopic component (82) retracts, it drives the gripper (824) to release the pad (4).

6. The sleeper conveying device according to claim 5, characterized in that, The scissor telescopic assembly (82) includes a second drive assembly (823), a horizontal scissor linkage assembly (821), and a vertical scissor linkage assembly (822). The horizontal scissor linkage assembly (821) is installed on the mounting base (81), with one end connected to the second drive assembly (823) and the other end connected to the top of the vertical scissor linkage assembly (822). The gripper (824) is fixedly installed on the bottom of the vertical scissor linkage assembly (822). The second drive assembly (823) is installed on the mounting base (81) and is used to drive the gripper (824) to clamp or release the pad (4).

7. The sleeper conveying device according to claim 6, characterized in that, The horizontal scissor linkage assembly (821) includes two first links (8211) and two second links (8213); the two first links (8211) are arranged crosswise and hinged in the middle by a first pin (8212); the first pin (8212) is fixedly connected to the mounting base (81); one end of each of the two second links (8213) is hinged, and the other end is respectively hinged to one end of each of the two first links (8211); the vertical scissor linkage assembly (822) includes a third link (8221) and a fourth link (8213). 223); the third link (8221) and the fourth link (8223) are arranged crosswise and are hinged in the middle by the second pin (8222); the second pin (8222) is fixedly connected to the mounting base (81); the first link (8211) has an adjustment groove (82111) at the end away from the second link (8213); the third link (8221) and the fourth link (8223) are slidably disposed in the two adjustment grooves (82111) at the ends of the third link (8221) and the fourth link (8223) close to the first link (8211).

8. The sleeper conveying device according to claim 1, characterized in that, At least two rows of the rotating pad mechanism (7) are arranged at intervals along the width direction of the sleeper transport vehicle (1); multiple supporting pads (74) in the same row of the rotating pad mechanism (7) are arranged at intervals along the length direction of the sleeper transport vehicle (1) to jointly support the rail groove (301) of the same sleeper (3).

9. The sleeper conveying device according to claim 1, characterized in that, At least two rows of the pad clamping mechanisms (8) are arranged at intervals along the width direction of the sleeper rail transport vehicle (1); multiple grippers (824) in the same row of the pad clamping mechanisms (8) are arranged at intervals along the length direction of the sleeper rail transport vehicle (1) for jointly clamping the same pad (4).

10. An automatic conveying method based on the sleeper conveying device according to any one of claims 1 to 9, characterized in that, Includes the following steps: Step 1: Control the support block (74) of the rotating pad mechanism (7) to swing to the first position; Step 2: The vehicle-mounted gantry crane (2) controls the lifting frame (6) to descend, so that the support pad (74) is supported on the rail groove (301) of the first layer of sleeper (3) to be lifted, and is positioned by the support of the support pad (74); Step 3: Use the clamp (9) of the hanger (6) to grab the sleeper (3) of the current layer, and then use the vehicle-mounted gantry crane (2) to transport the grabbed sleeper (3) to the target location for storage. Step 4: Control the support block (74) of the rotating pad mechanism (7) to swing to the second position; Step 5: The vehicle-mounted gantry crane (2) drives the lifting frame (6) to return to the position above the sleeper (3) to be lifted, and controls the lifting frame (6) to descend so that the lifting frame (6) is supported on the wooden block (4) above the uppermost sleeper (3) to be lifted. Step 6: Make the clamp (9) of the hanger (6) clamp the sleeper (3) of the current layer, and at the same time, control the jaw (824) of the pad clamping mechanism (8) to clamp the pad (4). Step 7: First, transport the clamped sleeper (3) to the target location for storage using the vehicle-mounted gantry crane (2); then transport the clamped wooden block (4) to the wooden block collection box (5) using the vehicle-mounted gantry crane (2), and control the jaws (824) of the wooden block clamping mechanism (8) to release the wooden block (4). Step 8: Repeat steps 5-7 until all the sleepers (3) to be lifted on the sleeper transport vehicle (1) are transported to the target location for storage.

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