Railway transport unloading mechanism

Abstract

The utility model discloses a railway transportation is with unloading mechanism, including chassis, space transfer mechanism, stable clamping mechanism and auxiliary mechanism, space transfer mechanism includes longitudinal frame and elevating stand, stable clamping mechanism includes support pipe and clamping rod, the auxiliary mechanism includes driving ring and tight block, and space transfer mechanism adopts longitudinal frame, elevating stand and three -dimensional structure design of horizontal moving frame, cooperation vertical rail, cross rail and screw component, has realized the accurate positioning and stable movement of material in three -dimensional space, has solved the problem of traditional unloading equipment work range is limited, and the positioning accuracy is low, through the innovative connection mode of support pipe, clamping pipe and clamping rod, has solved the problem of traditional unloading equipment unstable connection thoroughly, and the ingenious cooperation of multiple groups of to shrink spring block and rotating ball block has formed reliable mechanical locking, has guaranteed the structural stability when high load work.

Description

Technical Field

[0001] This utility model relates to the field of unloading technology, and more specifically, to an unloading mechanism for railway transportation. Background Technology

[0002] Existing railway transport unloading mechanisms have significant shortcomings in spatial material transfer. Traditional equipment typically employs a simple single-axis or dual-axis structure, which cannot achieve precise positioning and transfer of materials in three-dimensional space. This structure limits the working range of the device, especially when handling irregularly shaped or specially positioned goods, often requiring manual assistance or multiple adjustments to complete the loading and unloading operation.

[0003] The existing clamping components of railway transportation unloading mechanisms use outdated connection methods, mostly employing traditional bolt fixing or simple snap-fit ​​structures. These connection methods have many drawbacks. First, the installation and disassembly process is cumbersome, usually requiring the use of special tools for multiple steps, which greatly extends the equipment preparation and maintenance time. In high-frequency railway transportation scenarios, this inefficient connection method seriously affects the overall operational efficiency.

[0004] Furthermore, traditional connection methods have poor adaptability, making it difficult to quickly change different types of clamping components to meet various cargo requirements. In railway transportation, a wide variety of goods need to be handled, from standard containers to irregularly shaped large equipment, and even special goods such as dangerous or fragile items, all requiring different types of clamping devices. Existing equipment cannot achieve rapid conversion of clamping components, severely limiting the application scope and work efficiency of unloading mechanisms. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] In view of the problems existing in the prior art, this utility model provides a railway transportation unloading mechanism to solve the technical problems mentioned in the background art, such as poor spatial material transfer effect, inconvenient installation and disassembly of clamping components, and inconvenience in maintenance.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: a railway transportation unloading mechanism, comprising a base frame, a spatial transfer mechanism, a stabilizing clamping mechanism, and an auxiliary mechanism. The spatial transfer mechanism includes a longitudinal frame and a lifting frame. The longitudinal frame is mounted on the side of the base frame. The lifting frame is slidably mounted on the longitudinal frame. A transverse sliding frame is slidably mounted on the lifting frame. An installation block is mounted on the transverse sliding frame. A rotating component is mounted on the installation block. A clamping component is mounted on the rotating component. The stabilizing clamping mechanism includes a support tube and a clamping rod. The support tube is fixedly mounted on the installation block. A clamping tube is rotatably mounted on the upper limit of the support tube. One end of the clamping rod is mounted on the transverse sliding frame. An inner rotating ring is mounted on the inner wall of the clamping tube. A counter-contraction spring block is slidably mounted at the bottom end of the inner rotating ring. Multiple sets of counter-contraction spring blocks are provided. A rotating ring is mounted on the outer wall of the clamping rod. A rotating ball block is mounted on the top end of the rotating ring. The rotating ball block passes sequentially between different counter-contraction spring blocks, so that the clamping rod and the clamping tube are relatively stably connected.

[0009] The present invention is further configured such that the auxiliary mechanism includes a driving ring and a tightening block. The driving ring is fixedly installed at the bottom end of the side wall of the clamping tube, and a connecting plate is installed at the bottom end of the side wall of the support tube. Multiple sets of tightening blocks are slidably installed at the top end of the connecting plate, and a tightening spring is installed between adjacent tightening blocks. A rotating block is installed at the bottom end of the driving ring, and multiple sets of rotating blocks are provided. The rotating blocks pass through the space between adjacent tightening blocks in sequence, so that the driving ring stably drives the clamping tube to rotate.

[0010] The present invention is further configured such that a vertical rail is installed on the longitudinal frame, and the lifting frame slides longitudinally on the vertical rail. The vertical rail is installed on the longitudinal frame to provide a stable longitudinal sliding track for the lifting frame, ensuring the accuracy and stability of vertical movement.

[0011] The present invention is further configured such that a horizontal rail is installed on the lifting frame, and the transverse frame is laterally slidable on the horizontal rail. The horizontal rail is installed on the lifting frame to provide a stable transverse sliding track for the transverse frame, ensuring the accuracy and stability of the horizontal movement.

[0012] The present invention is further configured such that a longitudinal lead screw assembly and a transverse lead screw assembly are respectively installed on the longitudinal frame and the lifting frame, and the lifting frame and the transverse frame are respectively installed on the longitudinal lead screw assembly and the transverse lead screw assembly.

[0013] The present invention is further configured such that a bolt sleeve is installed at one end of the clamping assembly, a bolt rod plate is installed inside the bolt sleeve, and a handle is installed at one end of the bolt rod plate, which can press against the material.

[0014] The present invention is further configured such that a limiting ring is installed on the inner wall of the support tube, and a push-out spring is installed on the outer wall of the snap-fit ​​rod. One end of the push-out spring can contact the bottom end of the limiting ring. The push-out spring is installed on the outer wall of the snap-fit ​​rod, and one end can contact the limiting ring to prevent the snap-fit ​​rod from being over-inserted, while providing a push-out force to assist in disassembly.

[0015] The present invention is further configured such that a drive wheel assembly and casters are installed at the bottom end of the base frame. The drive wheel assembly is installed at the bottom of the base frame to provide active movement capability, enabling the entire device to move flexibly in railway transportation sites and improve work efficiency.

[0016] (III) Beneficial Effects

[0017] Compared with the prior art, this utility model provides a railway transportation unloading mechanism, which has the following beneficial effects:

[0018] This utility model features a spatial transfer mechanism, which employs a three-dimensional structural design of a longitudinal frame, a lifting frame, and a transverse frame. Combined with vertical rails, horizontal rails, and lead screw components, it enables precise positioning and smooth movement of materials in three-dimensional space. This solves the problems of limited working range and low positioning accuracy of traditional unloading equipment, allowing the device to adapt to various complex working conditions and significantly improving unloading efficiency and accuracy. The coordinated design of the rotating and clamping components further enhances the device's adaptability to materials of different shapes and sizes.

[0019] This utility model features a stable locking mechanism. Through an innovative connection method involving the support tube, locking tube, and locking rod, it completely solves the problem of unstable connection in traditional unloading equipment. The ingenious cooperation of multiple sets of spring blocks and rotating ball blocks forms a reliable mechanical lock, ensuring structural stability under high load. At the same time, the limit rotation design balances stability and flexibility, allowing the locking rod and locking tube to be firmly connected while maintaining a certain adjustment space, greatly improving the equipment's adaptability and safety in complex environments.

[0020] This utility model incorporates an auxiliary mechanism, which employs a combination design of a drive ring, a tightening block, and a tightening spring. This provides precise control and additional stability to the clamping system. The staggered cooperation of multiple sets of rotating blocks and tightening blocks enables the drive ring to stably control the clamping pipe, allowing operators to easily and accurately adjust the clamping angle. This simplifies the operation process, improves adjustment accuracy, and significantly reduces the difficulty of operation and the labor intensity of personnel. The elastic return force provided by the tightening spring ensures the continuous stability of the system under vibration. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the device in the unused state of this utility model;

[0022] Figure 2 This is a schematic diagram of the clamping component in this utility model. Figure 1 ;

[0023] Figure 3 This is a schematic diagram of the clamping component in this utility model. Figure 2 ;

[0024] Figure 4 This is a schematic diagram of the stabilizing latching mechanism and auxiliary mechanism in this utility model;

[0025] Figure 5 This is a schematic diagram of the internal structure of the stabilizing locking mechanism and the auxiliary mechanism in this utility model.

[0026] In the diagram: 1. Base frame; 2. Longitudinal frame; 3. Lifting frame; 4. Lateral frame; 5. Mounting block; 6. Rotating assembly; 7. Clamping assembly; 8. Support tube; 9. Connecting rod; 10. Connecting tube; 11. Inner rotating ring; 12. Reduction spring block; 13. Rotating ring; 14. Rotating ball block; 15. Driving ring; 16. Tightening block; 17. Connecting plate; 18. Tightening spring; 19. Rotating block; 20. Vertical rail; 21. Horizontal rail; 22. Longitudinal lead screw assembly; 23. Lateral lead screw assembly; 24. Bolt sleeve; 25. Bolt rod plate; 26. Turn handle; 27. Restricting ring; 28. Push-out spring; 29. ​​Drive wheel assembly; 30. Universal wheel. Detailed Implementation

[0027] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0028] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0029] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0030] Please see Figures 1-5A railway transport unloading mechanism includes a base frame 1, a spatial transfer mechanism, a stabilizing clamping mechanism, and auxiliary mechanisms. The spatial transfer mechanism includes a longitudinal frame 2 and a lifting frame 3. The longitudinal frame 2 is mounted on the side of the base frame 1. The lifting frame 3 is slidably mounted on the longitudinal frame 2. A transverse sliding frame 4 is laterally slidably mounted on the lifting frame 3. An installation block 5 is mounted on the transverse sliding frame 4. A rotating component 6 is mounted on the installation block 5. A clamping component 7 is mounted on the rotating component 6. The stabilizing clamping mechanism includes a support tube 8 and a clamping rod 9. The support tube 8 is fixedly mounted on... Mounted on mounting block 5, support tube 8 is rotatably mounted with clamping tube 10, one end of clamping rod 9 is mounted on transverse frame 4, inner rotating ring 11 is mounted on inner wall of clamping tube 10, and a counter spring block 12 is slidably mounted at bottom end of inner rotating ring 11. Multiple sets of counter spring blocks 12 are provided. Rotating ring 13 is mounted on outer wall of clamping rod 9, and rotating ball block 14 is mounted at top end of rotating ring 13. Rotating ball block 14 passes through different counter spring blocks 12 in sequence, so that clamping rod 9 and clamping tube 10 are relatively stably connected.

[0031] In this embodiment, the spatial transfer mechanism achieves precise positioning in three-dimensional space through the coordinated action of the longitudinal frame 2, the lifting frame 3, and the transverse frame 4. First, the longitudinal frame 2 is fixed to the side of the base frame 1. The lifting frame 3 slides vertically on the longitudinal frame 2 via the vertical rail 20 to achieve height adjustment. At the same time, the longitudinal screw assembly 22 provides precise lifting drive. Next, the transverse frame 4 slides horizontally on the transverse rail 21 on the lifting frame 3, controlled by the transverse screw assembly 23 to achieve lateral position adjustment. The mounting block 5 installed on the transverse frame 4 supports the rotating assembly 6. The clamping assembly 7 on the rotating assembly 6 can be rotated to adjust the angle. Finally, the clamping mechanism composed of the bolt sleeve 24, the bolt plate 25, and the handle 26 firmly grips the material, ensuring stability. The fixed locking mechanism consists of a support tube 8 and a locking rod 9, which provides stability for the transfer process. The support tube 8 is fixed on the mounting block 5, and the locking tube 10 rotates at the upper limit of the support tube 8. When the locking rod 9 connected to the transverse frame 4 is inserted into the locking tube 10, the bottom of the inner rotating ring 11 on the inner wall of the locking tube 10 is provided with multiple sets of spring blocks 12. The rotating ball block 14 on the top of the rotating ring 13 on the outer wall of the locking rod 9 passes through the different spring blocks 12 in sequence to form a mechanical lock, so that the locking rod 9 and the locking tube 10 form a stable and flexible connection. It can bear the load and allow a large force to rotate when necessary, so that the rotating ball block 14 is disengaged from the spring blocks 12, thereby releasing the locking rod 9 from the locking tube 10.

[0032] The auxiliary mechanism includes a drive ring 15 and a tightening block 16. The drive ring 15 is fixedly installed at the bottom end of the side wall of the clamping pipe 10. A connecting plate 17 is installed at the bottom end of the side wall of the support pipe 8. Multiple sets of tightening blocks 16 are slidably installed at the top end of the connecting plate 17. A tightening spring 18 is installed between adjacent tightening blocks 16. A rotating block 19 is installed at the bottom end of the drive ring 15. Multiple sets of rotating blocks 19 are provided. The rotating blocks 19 pass through the spaces between adjacent tightening blocks 16 in sequence, so that the drive ring 15 stably drives the clamping pipe 10 to rotate.

[0033] In this embodiment, the auxiliary mechanism enhances the operability and stability of the system by using a drive ring 15 and a tightening block 16. The drive ring 15 is fixed to the bottom of the side wall of the clamping tube 10, while multiple sets of tightening blocks 16 are installed on the connecting plate 17 at the bottom of the side wall of the support tube 8, which slides in a centripetal direction. A tightening spring 18 is provided between adjacent tightening blocks 16. Multiple sets of rotating blocks 19 at the bottom of the drive ring 15 pass through the gap between adjacent tightening blocks 16 in sequence. When the drive ring 15 is operated, the rotating blocks 19 interact with the tightening blocks 16, enabling the drive ring 15 to stably drive the clamping tube 10 to rotate. At the same time, the tightening spring 18 provides appropriate rebound force and limiting function to prevent excessive rotation.

[0034] Please see Figures 1-5 As a supplementary embodiment of a railway transportation unloading mechanism for a space transfer mechanism, a stabilizing clamping mechanism, and an auxiliary mechanism: A vertical rail 20 is installed on the longitudinal frame 2, a lifting frame 3 is longitudinally slidably arranged on the vertical rail 20, a horizontal rail 21 is installed on the lifting frame 3, and a transverse sliding frame 4 is laterally slidably arranged on the horizontal rail 21. A longitudinal screw assembly 22 and a transverse screw assembly 23 are respectively installed on the longitudinal frame 2 and the lifting frame 3, and the lifting frame 3 and the transverse sliding frame 4 are respectively installed on the longitudinal screw assembly 22 and the transverse screw assembly 23. A bolt sleeve 24 is installed at one end of the clamping assembly 7, a bolt rod plate 25 is installed inside the bolt sleeve 24, and a handle 26 is installed at one end of the bolt rod plate 25. The bolt rod plate 25 can press against the material. A limiting ring 27 is installed on the inner wall of the support tube 8. A push-out spring 28 is installed on the outer wall of the clamping rod 9, and one end of the push-out spring 28 can contact the bottom end of the limiting ring 27. A drive wheel assembly 29 and a universal wheel 30 are installed at the bottom end of the base frame 1.

[0035] More specifically, the device is moved to the designated position by the drive wheel assembly 29 and casters 30 at the bottom of the base frame 1. The lifting frame 3 is moved on the vertical rail 20 by the longitudinal screw assembly 22 to adjust the height. Then, the transverse screw assembly 23 controls the transverse frame 4 to move on the horizontal rail 21 to achieve precise planar positioning. The angle of the clamping assembly 7 is adjusted by the rotating assembly 6 to match the placement of the material. The clamping rod 9 is connected to the clamping tube 10. The rotating ball block 14 passes through the gap of the spring block 12 to form a stable connection. At the same time, the push-out spring 28 cooperates with the limiting ring 27 to prevent accidental detachment. By operating the driving ring 15, the rotation of the clamping tube 10 is precisely controlled by the cooperation of the rotating block 19 and the tightening block 16 to further adjust the clamping angle. The bolt plate 25 in the bolt sleeve 24 is adjusted. The handle 26 is rotated to press the bolt plate 25 against the material to achieve firm clamping. After clamping is completed, the entire system works together to safely transfer the material from one place to another, maintaining stability throughout the process.

[0036] In summary, during the use or operation of the overall equipment: When the spatial transfer mechanism is required to operate, the spatial transfer mechanism achieves precise positioning in three-dimensional space through the coordinated action of the longitudinal frame 2, the lifting frame 3, and the transverse frame 4. First, the longitudinal frame 2 is fixed to the side of the base frame 1. The lifting frame 3 slides vertically on the longitudinal frame 2 via the vertical rail 20 to achieve height adjustment. At the same time, the longitudinal screw assembly 22 provides precise lifting drive. Next, the transverse frame 4 slides horizontally on the transverse rail 21 on the lifting frame 3, controlled by the transverse screw assembly 23 to achieve lateral position adjustment. The mounting block 5 installed on the transverse frame 4 supports the rotating assembly 6. The clamping assembly 7 on the rotating assembly 6 can be rotated to adjust the angle. Finally, the clamping mechanism composed of the bolt sleeve 24, the bolt plate 25, and the handle 26 firmly grips the material.

[0037] When the stable clamping mechanism is required to operate, it consists of a support tube 8 and a clamping rod 9, providing stability for the transfer process. The support tube 8 is fixed on the mounting block 5, and the clamping tube 10 rotates at its upper limit on the support tube 8. When the clamping rod 9 connected to the transverse frame 4 is inserted into the clamping tube 10, the bottom of the inner rotating ring 11 on the inner wall of the clamping tube 10 is provided with multiple sets of spring blocks 12. The rotating ball block 14 on the top of the rotating ring 13 on the outer wall of the clamping rod 9 passes through the different spring blocks 12 in sequence to form a mechanical lock, so that the clamping rod 9 and the clamping tube 10 form a stable and flexible connection. It can bear the load and allow a large force to rotate when necessary, so that the rotating ball block 14 disengages from the spring blocks 12, thereby releasing the clamping rod 9 from the clamping tube 10. This facilitates the installation and disassembly of the clamping components and makes maintenance or repair easier.

[0038] When the auxiliary mechanism is required, it enhances the system's operability and stability by driving the ring 15 and tightening blocks 16. The ring 15 is fixed to the bottom of the side wall of the clamping tube 10, while multiple sets of tightening blocks 16 are installed on the connecting plate 17 at the bottom of the side wall of the support tube 8, which slides inward. A tightening spring 18 is provided between adjacent tightening blocks 16. Multiple sets of rotating blocks 19 at the bottom of the ring 15 pass through the gap between adjacent tightening blocks 16 in sequence. When the ring 15 is operated, the rotating blocks 19 interact with the tightening blocks 16, enabling the ring 15 to stably drive the clamping tube 10 to rotate. At the same time, the tightening spring 18 provides appropriate rebound force and limit function to prevent excessive rotation.

[0039] The device is moved to the designated position by the drive wheel assembly 29 and casters 30 at the bottom of the base frame 1. The lifting frame 3 is moved on the vertical rail 20 by the longitudinal screw assembly 22 to adjust the height. Then, the transverse screw assembly 23 controls the transverse frame 4 to move on the horizontal rail 21 to achieve precise planar positioning. The angle of the clamping assembly 7 is adjusted by the rotating assembly 6 to match the placement of the material. The locking rod 9 is connected to the locking tube 10. The rotating ball block 14 passes through the gap of the spring block 12 to form a stable connection. At the same time, the push-out spring 28 cooperates with the limiting ring 27 to prevent accidental detachment. By operating the drive ring 15, the rotation of the locking tube 10 is precisely controlled by the cooperation of the rotating block 19 and the tightening block 16 to further adjust the clamping angle. The bolt plate 25 in the bolt sleeve 24 is adjusted. The handle 26 is rotated to press the bolt plate 25 against the material to achieve a firm clamping. After clamping is completed, the entire system works together to safely transfer the material from one place to another, maintaining stability throughout the process.

[0040] Of all the solutions mentioned above, those involving the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

[0041] In all the solutions mentioned above, those involving the operation of electrical components, unless otherwise explicitly described, are controlled by a controller. Since the devices matched with the controllers are common devices, their control principles and circuit connections are existing, well-known, and mature technologies, and their specific circuit structures will not be elaborated here. In all the solutions mentioned above, those involving motors can be used with a reducer if necessary. The connection structure and working principle between the motor and the reducer are existing, well-known technologies, and will not be elaborated here.

Claims

1. A railway transportation unloading mechanism, comprising a base frame (1), a spatial transfer mechanism, a stabilizing clamping mechanism, and an auxiliary mechanism, characterized in that: The spatial transfer mechanism includes a longitudinal frame (2) and a lifting frame (3). The longitudinal frame (2) is installed on the side of the base frame (1). The lifting frame (3) is slidably mounted on the longitudinal frame (2). A transverse sliding frame (4) is slidably mounted on the lifting frame (3). A mounting block (5) is mounted on the transverse sliding frame (4). A rotating component (6) is mounted on the mounting block (5). A clamping component (7) is mounted on the rotating component (6). The stabilizing clamping mechanism includes a support tube (8) and a clamping rod (9). The support tube (8) is fixedly mounted on the mounting block (5). On the support tube (8), a clamping tube (10) is installed at the upper limit of the rotating part. One end of the clamping rod (9) is installed on the transverse frame (4). An inner rotating ring (11) is installed on the inner wall of the clamping tube (10). A pair of spring blocks (12) is installed at the bottom end of the inner rotating ring (11) in a centripetal sliding manner. There are multiple sets of spring blocks (12). A rotating ring (13) is installed on the outer wall of the clamping rod (9). A rotating ball block (14) is installed at the top end of the rotating ring (13). The rotating ball block (14) passes through different spring blocks (12) in sequence.

2. The unloading mechanism for railway transportation according to claim 1, characterized in that: The auxiliary mechanism includes a drive ring (15) and a tightening block (16). The drive ring (15) is fixedly installed at the bottom end of the side wall of the clamping tube (10). A connecting plate (17) is installed at the bottom end of the side wall of the support tube (8). Multiple sets of tightening blocks (16) are slidably installed at the top end of the connecting plate (17). A tightening spring (18) is installed between adjacent tightening blocks (16). A rotating block (19) is installed at the bottom end of the drive ring (15). Multiple sets of rotating blocks (19) are provided. The rotating blocks (19) pass through the adjacent tightening blocks (16) in sequence, so that the drive ring (15) stably drives the clamping tube (10) to rotate.

3. The unloading mechanism for railway transportation according to claim 1, characterized in that: The longitudinal frame (2) is equipped with a vertical rail (20), and the lifting frame (3) is longitudinally slidably set on the vertical rail (20).

4. The unloading mechanism for railway transportation according to claim 1, characterized in that: The lifting frame (3) is equipped with a horizontal rail (21), and the transverse frame (4) is laterally slidable on the horizontal rail (21).

5. The unloading mechanism for railway transportation according to claim 1, characterized in that: The longitudinal frame (2) and the lifting frame (3) are respectively equipped with a longitudinal screw assembly (22) and a transverse screw assembly (23), and the lifting frame (3) and the transverse frame (4) are respectively installed on the longitudinal screw assembly (22) and the transverse screw assembly (23).

6. The unloading mechanism for railway transportation according to claim 1, characterized in that: One end of the clamping assembly (7) is provided with a sleeve (24), a bolt plate (25) is provided inside the sleeve (24), and a handle (26) is provided at one end of the bolt plate (25). The bolt plate (25) can press against the material.

7. The unloading mechanism for railway transportation according to claim 1, characterized in that: A limiting ring (27) is installed on the inner wall of the support tube (8), and a push-out spring (28) is installed on the outer wall of the snap-fit ​​rod (9), with one end of the push-out spring (28) contacting the bottom end of the limiting ring (27).

8. The unloading mechanism for railway transportation according to claim 1, characterized in that: The bottom end of the base frame (1) is equipped with a drive wheel assembly (29) and a caster wheel (30).

Images