A trackless car structure

Abstract

The application provides a trackless vehicle compartment structure, which comprises a bottom plate, a compartment plate, a first supporting beam and a traction accessory. The bottom plate has a first side face and a second side face opposite to each other. The compartment plate is connected to the first side face, so that the compartment plate and the bottom plate jointly form an L-shaped compartment structure. The first supporting beam has a beam body connected to the second side face and extending along a first direction on the second side face, so that one end of the first supporting beam is close to the compartment plate. The traction accessory is connected to the bottom plate and / or the compartment plate, and has a fixing part and a switching part. The fixing part is connected to the beam body of the first supporting beam, and the switching part extends to the outside of the compartment plate. A switching through hole for connecting a rope is arranged on the switching part. The technical problem of insufficient structural reliability of the traction accessory caused by the fact that the traction accessory is only connected to a single component on the vehicle compartment is solved. The plastic deformation amount of the compartment component, the tearing of the connection and the falling of the accessory caused by repeated or high-strength traction are effectively reduced. The connection structural reliability and service life of the traction accessory are significantly improved.

Description

Technical Field

[0001] This application relates to the technical field of transport carriages, and more particularly to a trackless carriage structure. Background Technology

[0002] Trackless mining carriages are specialized transportation equipment designed for underground mining environments. Typically serving as carriers for trackless rubber-tired vehicles, they fulfill the core functions of personnel transport and material transfer. These carriages, integrated with or independently attached to a powered chassis, form a complete underground transportation system and are key structural components for achieving efficient and flexible transportation operations within mines. Their structural design must balance load-bearing capacity, operational stability, and adaptability to complex underground working conditions. They must not only meet the basic functional requirements for carrying personnel or goods but also possess excellent safety and maintainability, making them an indispensable part of mining transportation equipment.

[0003] In existing technologies, to address potential operational malfunctions (such as power failure or brake abnormalities) in underground trackless vehicles, traction attachments, such as tow hooks or tow rings, are typically installed on the vehicle body. These attachments are fixedly mounted at specific locations at the front or rear of the vehicle body and are used to connect with other rescue vehicles via ropes, chains, or rigid tow bars in emergencies, enabling the towing or being towed of the disabled vehicle. This design significantly enhances the emergency response capabilities of underground transportation systems, ensuring the continuity and safety of transportation operations.

[0004] However, existing traction attachment installation methods still have significant technical shortcomings. Specifically, current traction attachments are typically connected only to a single structural component (such as a crossbeam, side plate, or local reinforcing rib) on the vehicle body, concentrating the stress in that localized area. During actual towing, the traction force acts on this single component for an extended period, easily leading to plastic deformation or even structural failure due to stress concentration. Simultaneously, due to the limited connection area between the traction attachment and the vehicle body, the shear and pull-out resistance of the connection interface is insufficient. Under high-intensity or repeated traction conditions, there are serious safety hazards such as tearing of the connection structure and attachment detachment, threatening the safety of underground workers and the integrity of equipment. Therefore, a more reliable and more uniformly stress-distributed traction attachment installation scheme is urgently needed to overcome the shortcomings of existing technologies. Utility Model Content

[0005] This application provides a trackless carriage structure to solve the technical problem of insufficient structural reliability in the prior art due to the traction attachment only connecting a single component of the carriage. The technical solution is as follows:

[0006] This application provides a trackless vehicle structure, including: a floor plate having a first side and a second side facing away from each other; a side panel connected to the first side so that the side panel and the floor plate together form an L-shaped body structure; a first support beam, the beam of the first support beam being connected to the second side and extending along a first direction on the second side, with one end of the first support beam close to the side panel; and a traction attachment connected to the floor plate and / or the side panel, the traction attachment having a fixing part and a connecting part, the fixing part being connected to the beam of the first support beam, the connecting part extending to the outside of the side panel, and the connecting part also having a connecting through hole for connecting a rope.

[0007] In one embodiment, the traction attachment further includes an extension located between the fixed part and the transition part; a first through hole is provided on the bottom plate, and a second through hole is provided on the side plate; the extension passes through the first through hole and the second through hole so that the transition part can be exposed on the outside of the side plate.

[0008] In one embodiment, the extension is fixedly connected to the wall of the first through hole.

[0009] In one embodiment, the extension is fixedly connected to the wall of the second through hole.

[0010] In one embodiment, the system further includes: a support frame connected to the first side, the support frame being elongated and extending along a second direction perpendicular to the first direction; the panel being bent into a U-shaped structure, having a first side wall and a second side wall and a third side wall located on both sides of the first side wall and disposed opposite to each other, and a second through hole being formed on the first side wall; the two ends of the support frame being supported on the second side wall and the third side wall, and the support frame being connected to the first side wall to provide a supporting force to the U-shaped panel.

[0011] In one embodiment, a third through hole is provided on the support frame, an extension is inserted into the third through hole, and the extension is fixedly connected to the wall of the third through hole.

[0012] In one embodiment, it further includes: a second support beam, the beam body of the second support beam being connected to a second side surface and extending along a second direction perpendicular to the first direction on the second side surface; the end of the first support beam near the panel being connected to the beam body of the second support beam; a fourth through hole is provided on the beam body of the second support beam, the extension portion passing through the fourth through hole, and the extension portion being fixedly connected to the hole wall of the fourth through hole.

[0013] In one embodiment, it further includes: a bending plate component, which, after being bent, has a first side, a second side, and a bent third side; the first side is connected to the second side, the second side is connected to the beam body of the second support beam, and the third side is connected to the extension.

[0014] In one embodiment, it further includes: a bumper having a fifth through hole, the bumper being connected to the outer wall of the panel and fitted onto the transition part through the fifth through hole.

[0015] Compared with existing technologies, the trackless carriage structure proposed in the above technical solution rigidly connects the fixing part of the traction attachment to the first support beam extending along the length of the floor plate, and fixes it to the floor plate and / or the carriage plate at multiple points or on multiple surfaces. This prevents the traction force generated during traction from being concentrated on a single component of the carriage, but instead distributes it through the traction attachment to the L-shaped rigid integral structure formed by the floor plate, the carriage plate, and the first support beam. This suppresses local stress concentration and effectively reduces the risk of plastic deformation of carriage components, connection tearing, or attachment detachment caused by repeated or high-intensity traction, significantly improving the reliability and service life of the traction attachment connection structure. The fixed connection of the traction attachment to the first support beam and the floor plate and / or carriage plate also enhances the rigidity and load-bearing capacity of the overall structure. The transition part extends to the outside of the carriage plate and is provided with a transition through hole to facilitate quick and stable rope connection, while ensuring that the direction of traction force matches the force transmission path, further optimizing the stress state.

[0016] The technical solution of this application achieves a high degree of integration between traction function and carriage without increasing structural weight or space occupation. It takes into account both the adaptability to the confined working environment underground and the engineering requirements for safe traction. It provides a highly reliable and safe traction accessory installation structure for trackless mining equipment, and has good practical value and promotion prospects.

[0017] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of this application will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

[0018] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the various drawings denote the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings depict only some embodiments disclosed in this application and should not be construed as limiting the scope of this application.

[0019] Figure 1 This is a three-dimensional structural diagram of a trackless carriage structure according to an embodiment of this application;

[0020] Figure 2 for Figure 1 A top-down view of the structure;

[0021] Figure 3 for Figure 2AA section view;

[0022] Figure 4 for Figure 3 Enlarged view of part B;

[0023] Figure 5 for Figure 1 A structural diagram viewed from below.

[0024] Figure label:

[0025] 1. Base plate;

[0026] 11. First side view; 12. Second side view;

[0027] 2. Carriage board;

[0028] 21. First sidewall; 22. Second sidewall; 23. Third sidewall;

[0029] 3. First supporting beam;

[0030] 4. Traction accessories;

[0031] 41. Fixing part; 42. Adapter part; 43. Extension part;

[0032] 420. Adapter through hole;

[0033] 5. Support frame;

[0034] 6. Second support beam;

[0035] 7. Bending plate components;

[0036] 71. First side; 72. Second side; 73. Third side;

[0037] 8. Bumper. Detailed Implementation

[0038] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this application. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0039] Reference Figures 1 to 5As shown, an embodiment of this application proposes a trackless car structure, which may include: a floor plate 1 having a first side 11 and a second side 12 facing away from each other; a car body 2 connected to the first side 11 so that the car body 2 and the floor plate 1 together form an L-shaped car body structure; a first support beam 3, the beam of the first support beam 3 being connected to the second side 12 and extending along a first direction on the second side 12, so that one end of the first support beam 3 is close to the car body 2; and a traction attachment 4 connected to the floor plate 1 and / or the car body 2, the traction attachment 4 having a fixing part 41 and a connecting part 42, the fixing part 41 being connected to the beam of the first support beam 3, and the connecting part 42 extending to the outside of the car body 2, and the connecting part 42 also having a connecting through hole 420 for connecting a rope.

[0040] Specifically, in the technical solution adopted in this application, when the trackless carriage structure is assembled onto the vehicle chassis, the first side 11 is the top surface of the base plate 1, and the second side 12 is the bottom surface of the base plate 1. The carriage 2 is connected to the first side 11 of the base plate 1 and is close to one side of the base plate 1, thereby forming an L-shaped carriage structure. One or more first support beams 3 are provided on the second side 12 of the base plate 1. The first support beams 3 extend along the length direction of the base plate 1 (i.e., the first direction), such that one end of the first support beam 3 faces the side where the carriage 2 is located, that is, one end of the first support beam 3 is close to the carriage 2. The core point of this application is that a traction attachment 4 for connecting ropes is provided on the L-shaped carriage structure. The traction attachment 4 is connected to at least the first support beam 3 and the base plate 1 and / or the carriage 2, so that the traction attachment 4 and the L-shaped carriage structure together constitute a rigid body with higher structural stability. When traction is performed by connecting ropes through the traction attachment 4, the pulling force can be avoided from being concentrated on a single component, thereby significantly reducing the deformation or damage to the L-shaped carriage structure caused by uneven force.

[0041] In one embodiment of this application, the traction attachment 4 can be configured as a plate-like structure and can be fixedly connected to the bottom plate 1 and / or the side plate 2. The traction attachment 4 has at least a fixing part 41 and a connecting part 42. The fixing part 41 is connected to the beam body of the first support beam 3, preferably using an integral molding method; the connecting part 42 extends to the outer side of the side plate 2, for example, it can extend along the second side 12 and the outer wall of the side plate 2. Thus, when the traction attachment 4 is connected to the rope and subjected to a pulling force, the pulling force can be transmitted to the first support beam 3 and the bottom plate 1 and / or the side plate 2, thereby dispersing the force during traction and reducing the risk of deformation of the L-shaped body structure. In a preferred embodiment, the traction attachment 4 is simultaneously connected to the first support beam 3, the bottom plate 1, and the side plate 2, so that the pulling force can be more evenly distributed throughout the entire L-shaped body structure, further suppressing deformation caused by traction. In addition, in order to facilitate the connection of the traction attachment 4 with the rope, an adapter through hole 420 can be provided on the adapter part 42 for threading the rope.

[0042] Furthermore, refer to Figures 3 to 5 As shown, in some embodiments, the traction attachment 4 also has an extension 43 located between the fixed part 41 and the adapter part 42; a first through hole is provided on the bottom plate 1, and a second through hole is provided on the side plate 2; the extension 43 passes through the first through hole and the second through hole so that the adapter part 42 can be exposed on the outside of the side plate 2.

[0043] Specifically, in the technical solution adopted in this application, the extension method of the traction attachment 4 differs from the embodiment exemplified above. The traction attachment 4 has a fixing part 41, a connecting part 42, and an extension part 43, wherein the extension part 43 is located between the fixing part 41 and the connecting part 42. In this embodiment, the bottom plate 1 has a first through hole (not shown in the figure), and the side plate 2 has a second through hole (not shown in the figure). The fixing part 41 is still connected to the beam body of the first support beam 3, while the extension part 43 passes through the first and second through holes to penetrate the bottom plate 1 and the side plate 2, thereby exposing the connecting part 42 on the adjacent outer side for connection with a traction device having a rope.

[0044] Furthermore, in some embodiments, the extension 43 is fixedly connected to the wall of the first through hole.

[0045] Specifically, in the technical solution adopted in this application, in order to achieve a reliable connection between the traction attachment 4 and the bottom plate 1, the extension 43 can be connected to the wall of the first through hole by welding. This connection method can not only enhance the connection strength of the traction attachment 4, but also allow the traction attachment 4 to extend through the bottom plate 1, avoiding interference between the traction attachment 4 and other components on the second side 12 of the bottom plate 1, thereby optimizing the overall layout of the body structure.

[0046] Furthermore, in some embodiments, the extension 43 is fixedly connected to the wall of the second through hole.

[0047] Specifically, in the technical solution adopted in this application, in order to achieve a reliable connection between the traction attachment 4 and the box plate 2, the extension 43 can be connected to the wall of the second through hole by welding. This arrangement not only enhances the overall stability of the traction attachment 4 in the penetration path, but also allows the traction attachment 4 to pass through the box plate 2 after penetrating the bottom plate 1, and finally exposes the adapter 42 on the outside of the box plate 2, which is convenient for connection with traction equipment equipped with ropes.

[0048] Furthermore, refer to Figure 1As shown, in some embodiments, it further includes: a support frame 5 connected to the first side 11, the support frame 5 being elongated and extending along a second direction perpendicular to the first direction; the panel 2 being bent into a U-shaped structure, having a first side wall 21 and a second side wall 22 and a third side wall 23 located on both sides of the first side wall 21 and arranged opposite to each other, and a second through hole being opened on the first side wall 21; the two ends of the support frame 5 are supported on the second side wall 22 and the third side wall 23, and the support frame is also connected to the first side wall 21 to provide supporting force to the U-shaped panel 2.

[0049] Specifically, in the technical solution adopted in this application, the support frame 5 can be a hollow frame formed by four rectangular plates. One side of the support frame 5 is connected to the first side 11 of the base plate 1 by welding, and the length of the support frame 5 extends along the width direction of the base plate 1 (i.e., the second direction mentioned above). The box plate 2 is formed into a U-shaped structure by bending, so that the first side wall 21, the second side wall 22 and the third side wall 23 of the box plate 2 together enclose the accommodating space in the area above the base plate 1. In order to facilitate the smooth insertion of the extension 43 of the traction attachment 4 into the second through hole, the second through hole can be arranged on the first side wall 21. In this embodiment, the two ends of the support frame 5 are supported on the second side wall 22 and the third side wall 23, and the other side of the support frame 5 is connected to the first side wall 21 by welding. This structure can not only provide support force for the box panel 2 on the base through the support frame 5 to strengthen the structural strength of the box panel 2, but also increase the connection area between the bottom plate 1 and the box panel 2 through the support frame 5 to improve the reliability of the connection structure.

[0050] Furthermore, refer to Figure 1 and Figure 3 As shown, in some embodiments, the support frame 5 has a third through hole, the extension 43 is inserted into the third through hole, and the extension 43 is fixedly connected to the hole wall of the third through hole.

[0051] Specifically, in the technical solution adopted in this application, in order to ensure that the traction attachment 4 can still extend from the bottom plate 1 to the outside of the compartment after the addition of the support frame 5, this embodiment can also open a third through hole (not shown in the figure) on the support frame 5. After the fixing part 41 of the traction attachment 4 is connected to the first support beam 3, the extension part 43 of the traction attachment 4 passes through the first through hole, the third through hole and the second through hole in sequence, so that the connecting part 42 of the traction attachment 4 can be exposed on the outside of the compartment. In order to further enhance the connection strength between the traction attachment 4 and the compartment structure, the extension part 43 can also be connected to the hole wall of the third through hole by welding; thus, the traction attachment 4 achieves a common connection with the first support beam 3, the bottom plate 1, the support frame 5 and the compartment plate 2. When the traction attachment 4 is connected to the rope and subjected to a pulling force, the pulling force can be transmitted to the first support beam 3, the bottom plate 1, the support frame 5 and the box plate 2, so as to achieve a more uniform load distribution of the pulling force, further suppress the deformation of the box structure caused by traction, and effectively reduce the risk of damage to the box structure caused by the pulling force.

[0052] Furthermore, refer to Figure 5 As shown, in some embodiments, it further includes: a second support beam 6, the beam body of the second support beam 6 is connected to the second side 12 and extends along a second direction perpendicular to the first direction on the second side 12; the end of the first support beam 3 near the side panel 2 is connected to the beam body of the second support beam 6; a fourth through hole is provided on the beam body of the second support beam 6, the extension 43 is inserted into the fourth through hole, and the extension 43 is fixedly connected to the hole wall of the fourth through hole.

[0053] Specifically, in the technical solution adopted in this application, the beam body of the second support beam 6 is assembled on the second side 12 of the base plate 1 and extends along the width direction (i.e., the second direction) of the base plate 1. It can be understood that on the second side 12, if the first support beam 3 is used as a longitudinal beam, the second support beam 6 is used as a transverse beam, and the end of the first support beam 3 near the box plate 2 can be connected to the beam body of the second support beam 6 by welding to jointly enhance the structural strength of the base plate 1. In this embodiment, a fourth through hole (not shown in the figure) can also be opened on the beam body of the second support beam 6. After the fixing part 41 of the traction attachment 4 is fixed to the beam body of the first support beam 3, the extension part 43 of the traction attachment 4 passes through the fourth through hole, the first through hole, the third through hole and the second through hole in sequence, so that the connecting part 42 of the traction attachment 4 can be exposed on the outside of the box body. In order to further enhance the connection strength between the traction attachment 4 and the box body structure, the extension part 43 can also be connected to the hole wall of the fourth through hole by welding.

[0054] Thus, the traction attachment 4 is connected to the first support beam 3, the second support beam 6, the bottom plate 1, the support frame 5, and the box panel 2. With this structure, when the traction attachment 4 is connected to the rope and subjected to tensile force, the connection structure between the traction attachment 4 and the first and second support beams 3 and 6 is further strengthened. This effectively improves the load-bearing capacity of the entire box structure, enhances the traction attachment 4's ability to withstand tensile forces, and reduces the risk of damage to the connection structure caused by the traction attachment 4 bearing the entire box structure.

[0055] Furthermore, refer to Figures 3 to 5 As shown, in some embodiments, it further includes: a bending plate component 7, which, after being bent, has a first side 71, a second side 72, and a bent third side 73; the first side 71 is connected to the second side 12, the second side 72 is connected to the beam body of the second support beam 6, and the third side 73 is connected to the extension 43.

[0056] Specifically, in the technical solution adopted in this application, the bent plate component 7 can serve as a reinforcing connection between the base plate 1, the second support beam 6, and the traction attachment 4. After bending and forming, the bent plate component 7 forms a first side 71 and a second side 72 adapted to the assembly direction of the base plate 1 and the second support beam 6, and a third side 73 adapted to the extension direction of the traction attachment 4. In a preferred embodiment, when the second side 12 of the base plate 1 is provided with two first support beams 3, two traction attachments 4 are correspondingly configured. The first side 71 is connected to the second side 12 of the base plate 1 by welding, the second side 72 is connected to the beam body of the second support beam 6 by welding, and the two third sides 73 are respectively connected to the extensions 43 of the two traction attachments 4 passing through the fourth through hole by welding. Thus, the bent plate component 7 achieves a reliable connection with the base plate 1, the second support beam 6, and the traction attachment 4 simultaneously, thereby further enhancing the rigidity and integrity of the entire body structure.

[0057] Furthermore, refer to Figure 3 As shown, in some embodiments, it also includes: a bumper 8, which has a fifth through hole, the bumper 8 is connected to the outer wall of the panel 2, and is sleeved on the adapter 42 through the fifth through hole.

[0058] Specifically, in the technical solution adopted in this application, the bumper 8, as an additional external protective and load-bearing component, is fixedly installed on the outer wall of the box panel 2. Its core function is to provide external protection for the box panel 2. Through the fifth through hole (not shown in the figure) opened on the bumper 8, the bumper 8 can be fitted onto the adapter 42 through the fifth through hole, thereby forming a tight fit structure with the traction attachment 4. The bumper 8 can be reliably connected to the box panel 2 by welding or bolts, thereby forming a multi-reinforcement structure for the traction attachment 4 together with the first support beam 3, the second support beam 6, and the support frame 5. The bumper 8 can significantly improve the collision resistance of the entire trackless car structure under complex working conditions.

[0059] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of those different embodiments or examples.

[0060] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0061] Any process or method description in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing a particular logical function or process. Furthermore, the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functionality involved.

[0062] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus or device (such as a computer-based system, a processor-included system or other system that can fetch and execute instructions from, an instruction execution system, apparatus or device).

[0063] It should be understood that various parts of this application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. All or part of the steps of the methods in the above embodiments can be implemented by a program instructing related hardware, the program being stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiments.

[0064] Furthermore, the functional units in the various embodiments of this application can be integrated into a processing module, or each unit can exist physically separately, or two or more units can be integrated into a module. The integrated module can be implemented in hardware or as a software functional module. If the integrated module is implemented as a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium. This storage medium can be a read-only memory, a disk, or an optical disk, etc.

[0065] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this application, and these should all be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A trackless carriage structure, characterized in that, include: The base plate has a first side and a second side facing away from each other; A side panel is connected to the first side so that the side panel and the bottom plate together form an L-shaped body structure; A first support beam, the beam body of the first support beam is connected to the second side and extends along a first direction on the second side, such that one end of the first support beam is close to the panel; as well as, A traction attachment is connected to the base plate and / or the box plate. The traction attachment has a fixing part and a transition part. The fixing part is connected to the beam body of the first support beam, and the transition part extends to the outside of the box plate. The transition part is also provided with a transition through hole for connecting a rope.

2. The trackless carriage structure according to claim 1, characterized in that, The traction attachment also has an extension located between the fixing part and the adapter part; The bottom plate has a first through hole, and the side plate has a second through hole; The extension is inserted into the first through hole and the second through hole so that the transition part can be exposed on the outside of the panel.

3. The trackless carriage structure according to claim 2, characterized in that, The extension is fixedly connected to the wall of the first through hole.

4. A trackless carriage structure according to claim 2 or 3, characterized in that, The extension is fixedly connected to the wall of the second through hole.

5. The trackless carriage structure according to claim 4, characterized in that, Also includes: A support frame is connected to the first side, and the support frame is elongated and extends along a second direction perpendicular to the first direction; The panel is bent into a U-shaped structure, having a first side wall and a second side wall and a third side wall located on both sides of the first side wall and arranged opposite to each other, and the second through hole is opened on the first side wall; The two ends of the support frame are supported on the second side wall and the third side wall, and the support frame is also connected to the first side wall to provide supporting force to the U-shaped panel.

6. The trackless carriage structure according to claim 5, characterized in that, The support frame has a third through hole, the extension is inserted into the third through hole, and the extension is fixedly connected to the hole wall of the third through hole.

7. The trackless carriage structure according to claim 2, characterized in that, Also includes: The second support beam has its beam body connected to the second side surface and extends along a second direction perpendicular to the first direction on the second side surface. The end of the first support beam near the panel is connected to the beam body of the second support beam. The second support beam has a fourth through hole, the extension is inserted into the fourth through hole, and the extension is fixedly connected to the wall of the fourth through hole.

8. The trackless carriage structure according to claim 7, characterized in that, Also includes: The bent plate component, after being bent, has a first side, a second side, and a bent third side; The first side is connected to the second side, the second side is connected to the beam body of the second support beam, and the third side is connected to the extension.

9. The trackless carriage structure according to claim 1, characterized in that, Also includes: The bumper has a fifth through hole, the bumper is connected to the outer wall of the panel, and is fitted onto the transition part through the fifth through hole.

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