Lifting hook for lifting shield muck truck

Abstract

The utility model discloses a lifting hook for lifting a shield muck truck, which relates to the field of lifting hook structures, comprises a lifting hook body and is characterized in that a mounting groove is arranged on the lifting hook body and is used for being movably connected with or separated from a lifting lug piece on the muck truck; the lifting hook body comprises a first flat plate, a second flat plate and a folded plate part, one end of the folded plate part is connected with the first flat plate, the other end of the folded plate part is connected with the second flat plate, the folded plate part protrudes out of the first flat plate and the second flat plate, the inner side of the folded plate part, the first flat plate and the second flat plate form a groove, and the mounting groove faces the groove. According to the utility model, an existing hollow flat plate structure is improved into an outward convex structure and an inner side groove structure is formed, so that the aims of avoiding direct manual disassembly of the lifting hook and the lifting lug and improving the lifting efficiency and the lifting safety are fulfilled.

Description

Technical Field

[0001] This utility model relates to the field of hook structures, specifically to a hook for lifting tunnel boring machine dump trucks. Background Technology

[0002] During the tunnel boring machine (TBM) excavation process, the transportation and handling of excavated soil is one of the key aspects. As the TBM advances underground, the excavated soil is transported to the TBM hoisting shaft via rail-mounted dump trucks. At the hoisting shaft, the dump trucks are lifted to the surface by a gantry crane, and then transported by surface dump trucks to designated spoil disposal sites for treatment.

[0003] However, the existing lifting process using gantry cranes has certain limitations. When lifting dump trucks, gantry cranes typically use plate hooks (i.e., lifting hooks) to hook onto the lifting lugs on both sides of the dump truck. Current plate hook designs are based on a hollow, flat plate (such as...). Figure 1 As shown in the diagram, while this structure is simple, it brings many inconveniences in actual operation. Due to the shape and structural limitations of the hook, each lifting operation requires manual operation to accurately hook the hook onto the lifting lug of the dump truck. This process not only increases lifting time but also leads to increased labor costs, especially in cases of frequent lifting, where the inefficiency is particularly prominent.

[0004] Furthermore, the intervention of manual operation may also introduce certain safety hazards. During the hoisting process, workers need to be close to the hoisting equipment, which increases the operational risks. At the same time, the accuracy of manual operation may also be affected by factors such as fatigue, further reducing hoisting efficiency.

[0005] In view of the above, this application is hereby submitted. Utility Model Content

[0006] The purpose of this utility model is to provide a hook for lifting tunnel boring machine dump trucks. This hook improves the existing hollow flat plate structure by making it convex and forming an inner groove, thereby solving the problem of low installation efficiency of manually positioned hooks and lifting lugs in the prior art.

[0007] This utility model embodiment is achieved through the following technical solution: This utility model embodiment provides a hook for lifting shield tunneling dump trucks, including a hook body, and an installation groove is provided on the hook body. The installation groove is used to movably connect or separate from the lifting lugs on the dump truck.

[0008] The hook body includes a first plate, a second plate, and a folded plate. One end of the folded plate is connected to the first plate, and the other end is connected to the second plate. The folded plate protrudes outward from the first plate and the second plate, and its inner side forms a groove with the first plate and the second plate. The mounting groove faces the groove.

[0009] Optionally, the folding plate member includes a first folding plate, a second folding plate and a third folding plate;

[0010] One end of the first folding plate is connected to the first flat plate, and the other end of the first folding plate is connected to one end of the second folding plate;

[0011] One end of the third folding plate is connected to the second flat plate, and the other end of the third folding plate is connected to the other end of the second folding plate.

[0012] The third fold plate is parallel to either the first or second flat plate.

[0013] Optionally, the first plate and the second plate are on the same plane, the first folding plate and the second folding plate form an angle of 120° to 170°, and the third folding plate and the second folding plate form an angle of 120° to 170°.

[0014] Optionally, the mounting groove includes a first arc-shaped portion, an inclined portion, and a second arc-shaped portion, with the inclined portion located between the first arc-shaped portion and the second arc-shaped portion;

[0015] The first arc-shaped part is located at the upper end of the second arc-shaped part;

[0016] The diameter of the arc of the first arc part is larger than the diameter of the arc of the second arc part;

[0017] The first arc-shaped portion is configured to allow the lifting lug to pass through, and the inclined portion is configured to guide the lifting lug from the first arc-shaped portion into the second arc-shaped portion, the second arc-shaped portion being used to limit the lifting lug.

[0018] Optionally, the center of the second fold plate is on the same horizontal line as the center of the first arc-shaped part.

[0019] Optionally, the first folding plate and the third folding plate are arranged symmetrically with respect to the vertical center line of the first folding plate.

[0020] Optionally, the second arcuate portion is located on the second flat plate, and the first arcuate portion is located on the second folded plate.

[0021] Optionally, the thickness of the second and third folding plates is greater than the thickness of the first plate.

[0022] Optionally, the bottom of the second plate is arc-shaped.

[0023] Optionally, the width of the first plate is ≥300mm, the minimum distance between the edge of the first arc-shaped portion and the outer edge of the second folded plate is ≥100mm, and the distance between the bottom of the second plate and the second arc-shaped portion is ≥170mm.

[0024] Compared with the prior art, the embodiments of this utility model have the following advantages and beneficial effects:

[0025] 1. The first and second plates of the hook for hoisting the tunnel boring machine dump truck provided in this embodiment of the utility model are connected by folding plate parts to form a stable frame structure. The outward convex design and inner groove structure of the folding plate parts enable the mounting groove to accurately match the lifting lug of the dump truck. When the hook approaches the lifting lug of the dump truck, the lifting lug can naturally slide into the groove and be limited by the mounting groove.

[0026] During the hoisting process, the gantry crane lifts the hook using slings. The hook then quickly connects to the lifting lugs of the dump truck via an installation groove. Due to the convex structure and groove design of the folding plate component, the lifting lugs can naturally slide into the installation groove, achieving rapid positioning and connection. After hoisting, the hook can be easily separated from the lifting lugs to complete unloading. This embodiment of the invention, through the convex structure and installation groove design of the folding plate component, allows the hook to quickly and accurately connect and disconnect from the lifting lugs of the dump truck. This reduces the time and labor intensity of manual operation, while also reducing the operational risks for workers during hoisting and improving construction safety.

[0027] 2. In this embodiment of the utility model, the inclined arrangement of the first and third folding plates allows the lifting lugs to be quickly guided to the position of the third folding plate, thereby quickly aligning them and entering the mounting slot of the hook. This structure further reduces the alignment time during the lifting process, and also reduces swaying and instability factors during the lifting process, thus improving the safety of the lifting.

[0028] 3. By setting the center of the second folding plate and the center of the first arc-shaped part to the same horizontal line, this utility model embodiment can ensure that the path of the lifting lug is more stable and smooth when entering the installation groove. Under the guidance of the first arc-shaped part, the lifting lug can smoothly transition to the inclined part and then be guided into the second arc-shaped part for limiting. This structure can reduce the friction and jamming of the lifting lug during the introduction process. The horizontally aligned structure allows the lifting lug to slide naturally along the arc-shaped part when entering the installation groove, reducing the need for manual adjustment and thus improving the lifting efficiency.

[0029] In general, the lifting hook provided by the embodiments of this utility model for lifting shield tunneling dump trucks improves the existing hollow flat plate structure by making it convex and forming an inner groove, thereby avoiding direct manual intervention in the disassembly of the hook and lifting lug, and improving lifting efficiency and safety. Attached Figure Description

[0030] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 The hook structure diagram provided for the prior art, in which Figure 1 'a' is the front view. Figure 1 b is a side view;

[0032] Figure 2 This is a schematic diagram of the hook structure provided in an embodiment of the present utility model, wherein... Figure 2 'a' is the front view. Figure 2 b is a side view;

[0033] Figure 3 This is an initial state diagram of the lifting lug inserted into the mounting slot according to an embodiment of the present invention, wherein... Figure 3 'a' is the front view. Figure 3 b is a side view;

[0034] Figure 4 This is a schematic diagram of the hoisting state structure provided in an embodiment of the present utility model, wherein... Figure 4 'a' is the front view. Figure 4 b is a side view;

[0035] Figure 5 This is a schematic diagram of the structure of a dump truck provided in an embodiment of the present utility model;

[0036] Figure 6 This is a schematic diagram of the lifting lug structure, in which... Figure 6 'a' is the front view. Figure 6 b is a side view.

[0037] The attached diagram shows the markings and corresponding component names:

[0038] 1-Hook body, 2-Mounting groove, 3-Dump truck, 4-Lifting lug, 5-First flat plate, 6-Second flat plate, 7-Folded plate, 8-Groove, 9-First folded plate, 10-Second folded plate, 11-Third folded plate, 12-First arc-shaped part, 13-Inclined part, 14-Second arc-shaped part, 15-Ear rod, 16-Ear cap. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0040] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0041] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0042] In the description of this utility model, it should be noted that the terms "first", "second", "third", etc. are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance.

[0043] Example

[0044] like Figure 1 As shown, this utility model embodiment provides a hook for lifting a tunnel boring machine dump truck, including a hook body 1. The hook body 1 is provided with an installation groove 2, which is used to movably connect or separate from a lifting lug 4 on the dump truck 3. The lifting lug 4 on the dump truck 3 has the following structure: Figure 5 As shown, the hook body 1 includes a first plate 5, a second plate 6, and a folding plate 7. One end of the folding plate 7 is connected to the first plate 5, and the other end is connected to the second plate 6. The folding plate 7 protrudes outward from the first plate 5 and the second plate 6, and its inner side forms a groove 8 with the first plate 5 and the second plate 6. The mounting groove 2 is set facing the groove 8. Specifically, the first plate 5 is used to bear the weight of the dump truck 3 during the lifting process. When in use, it is connected to the lifting equipment (such as a gantry crane). The second plate 6 and the first plate 5 work together to provide stability and support. At the same time, it cooperates with the folding plate 7 to form the groove 8. The groove 8 is used to accommodate and guide the lifting lugs of the dump truck 3 into the mounting groove 2, so as to realize the automatic, accurate and fast installation of the lifting lugs 4 without relying on manual labor. This allows the hook to be quickly and accurately connected and separated from the lifting lugs of the dump truck 3, improving the lifting efficiency.

[0045] During use, the first plate 5 and the second plate 6 are connected by the folding plate 7 to form a stable frame structure. The outward convex design and inner groove 8 of the folding plate 7 allow the mounting groove 2 to precisely engage with the lifting lugs of the dump truck 3. When the hook approaches the lifting lugs of the dump truck 3, the lugs naturally slide into the groove 8 and are limited by the mounting groove 2. After lifting, the hook can be easily separated from the lifting lugs to complete the unloading. This structure reduces manual intervention, lowers operational risks, and improves the automation level of lifting, making the lifting process more efficient and safer, and reducing the risks caused by human error.

[0046] It should be noted that the connection between the first plate 5, the second plate 6 and the folded plate 7 can be achieved by welding, bonding or other methods, or they can be integrated as a single unit. There are no restrictions here, as long as sufficient connection stability can be achieved.

[0047] In a preferred embodiment of this utility model, the folding plate component 7 includes a first folding plate 9, a second folding plate 10, and a third folding plate 11; one end of the first folding plate 9 is connected to the first flat plate 5, and its other end is connected to one end of the second folding plate 10; one end of the third folding plate 11 is connected to the second flat plate 6, and its other end is connected to the other end of the second folding plate 10; the third folding plate 11 is parallel to the first flat plate 5 or the second flat plate 6. Specifically, the first folding plate 9 and the third folding plate 11 are inclined to achieve the outward protrusion of the hook body 1. The first folding plate 9, the second folding plate 10, and the third folding plate 11 form a stable groove 8 structure. Through the inclined arrangement of the first folding plate 9 and the third folding plate 11, the lifting lug 4 can be quickly guided, so that when the lifting lug 4 approaches the hook, it can naturally slide into the position of the third folding plate 11 along the inclined folding plate.

[0048] It should be noted that the tilt angles of the first folding plate 9 and the third folding plate 11 have been optimized to guide the lifting lug 4 to slide along the inclined surface of the folding plate, thereby quickly aligning it and entering the mounting slot 2 of the hook. For example, the first flat plate 5 and the second flat plate 6 are on the same plane, which helps improve the stability and load-bearing capacity of the hook. The first folding plate 9 and the second folding plate 10 form an angle of 120° to 170°, and the third folding plate 11 and the second folding plate 10 also form an angle of 120° to 170°. This angle range allows the lifting lug 4 to slide more smoothly along the folding plate when approaching the hook, quickly guiding it into the mounting slot 2 and reducing jamming caused by excessively small angles.

[0049] Furthermore, the mounting groove 2 includes a first arc-shaped portion 12, an inclined portion 13, and a second arc-shaped portion 14. The inclined portion 13 is located between the first arc-shaped portion 12 and the second arc-shaped portion 14. The first arc-shaped portion 12 is located at the upper end of the second arc-shaped portion 14. The arc diameter of the first arc-shaped portion 12 is larger than the arc diameter of the second arc-shaped portion 14. The first arc-shaped portion 12 is configured to allow the lifting lug 4 to pass through, and the inclined portion 13 is configured to guide the lifting lug 4 from the first arc-shaped portion 12 into the second arc-shaped portion 14. The second arc-shaped portion 14 is used to limit the lifting lug 4. Specifically, the first arc-shaped portion 12 has a larger arc diameter, allowing the lifting lug 4 to pass through smoothly and providing sufficient space for the lifting lug 4 to easily enter the mounting slot 2. The inclined portion 13 is located between the first arc-shaped portion 12 and the second arc-shaped portion 14, and plays a guiding role, smoothly guiding the lifting lug 4 from the first arc-shaped portion 12 to the second arc-shaped portion 14. This structure can reduce the jamming of the lifting lug 4 during the insertion process and ensure that the lifting lug 4 can smoothly transition to the second arc-shaped portion 14.

[0050] The second arc-shaped part 14 has a smaller arc diameter, which is used to limit the lifting lug 4. Its smaller diameter can fit tightly against the lifting lug 4, ensuring that the lifting lug 4 remains stable during the lifting process and preventing the lifting lug 4 from shaking or falling off during the lifting process. Through this segmented structure, the mounting groove 2 can quickly guide the lifting lug 4 into the correct position, reducing the time and labor intensity of manual adjustment and significantly improving the lifting efficiency.

[0051] In a preferred embodiment of this utility model, the center of the second folding plate 10 and the center of the first arc-shaped part 12 are on the same horizontal line. This allows the lifting lug 4 to be guided into the first arc-shaped part 12 more accurately and smoothly. Under the guidance of the first arc-shaped part 12, the lifting lug 4 can smoothly transition to the inclined part 13 and then be guided into the second arc-shaped part 14 for positioning. This structure can reduce the friction and jamming of the lifting lug 4 during the guiding process. The horizontally aligned structure allows the lifting lug 4 to slide naturally along the arc-shaped part when entering the mounting groove 2, reducing the need for manual adjustment and thus improving the lifting efficiency.

[0052] More preferably, the first folding plate 9 and the third folding plate 11 are symmetrically arranged with respect to the vertical center line of the first folding plate 9, the second arc-shaped part 14 is located on the second flat plate 6, and the first arc-shaped part 12 is located on the second folding plate 10. This symmetrical structure can ensure that the hook is evenly stressed during installation or disassembly, and reduce the problem of stress concentration caused by structural asymmetry, which reduces the efficiency of installation or disassembly.

[0053] To better understand the technical solution provided by this utility model, the specific structure and usage of the hook will be illustrated below.

[0054] For example, such as Figure 1 As shown, the first flat plate 5, the second folding plate 10, and the second flat plate 6 are vertical, while the first folding plate 9 and the third folding plate 11 are at a certain angle to the vertical direction. The folding plates are connected at obtuse angles (120°–170°), with all angles being the same. After the folding plates are connected, they form a convex structure in one direction. All components of the hook body 1 are made of high-strength steel, with a steel thickness of 60mm.

[0055] The widths of the second fold plate 10 and the third fold plate 11 are greater than those of the first flat plate 5. The first fold plate 9 connects the first flat plate 5 and the second fold plate 10 via an inclined line. The lower end of the second flat plate 6 is rounded.

[0056] The width of the first plate 5 is ≥300mm, the distance between the two sides of the second folding plate 10 and the two sides of the first arc-shaped part 12 is ≥100mm, and the distance between the lower edge of the second plate 6 and the lower edge of the second arc-shaped part 14 is ≥170mm, so as to ensure the force requirements.

[0057] The first folding plate 9, the second folding plate 10, the third folding plate 11, and the second flat plate 6 have a hollow mounting groove 2. The hollow structure is composed of a first arc-shaped part 12, a second arc-shaped part 14, and two oblique lines of the first arc-shaped part 12 and the second arc-shaped part 14 (inclined part 13).

[0058] Preferably, the diameter of the first arcuate portion 12 is greater than the diameter of the second arcuate portion 14. For example, the structure of the lug 4 is as follows: Figure 6 As shown, it includes an ear rod 15 and an ear cap 16, the diameter of the ear cap 16 being greater than the diameter of the ear rod 15.

[0059] The diameter of the ear rod 15 is less than the diameter of the second arc-shaped part 14 and the diameter of the ear cap 16. This allows the ear rod 15 to fall into the second arc-shaped part 14 and the ear cap 16 to protect the hanging ear 4 from slipping out.

[0060] The diameter of the first arc-shaped portion 12 is greater than the diameter of the ear cap 16, which ensures that the ear cap 16 can be inserted into the mounting groove 2.

[0061] hoisting steps:

[0062] 1. The hook body 1 is lowered to a horizontal position, with the center of the hook body 1 aligned with the center of the second folding plate 10.

[0063] 2. The hook body 1 moves laterally until the center of the hook body 1 coincides with the center of the lifting lug 4 (e.g., Figure 3 (As shown).

[0064] 3. The hook body 1 rises, and the lower edge of the rising hook body 1 contacts the lower edge of the second arc-shaped part 14 (e.g., ...). Figure 4 (As shown).

[0065] 4. The hook body 1 is under force and continues to rise, completing the lifting of the track muck truck 3.

[0066] After the track-mounted dump truck 3 is hoisted to the designated position, the unloading operation is completed.

[0067] Unhooking steps:

[0068] 1. Lower the hook body 1 and place it onto the base of the track dump truck 3.

[0069] 2. Continue to lower the hook body 1 until it is aligned with the center of the lifting lug 4 and the center of the second folding plate 10. At this point, the hook body 1 has detached from the lifting lug 4.

[0070] 3. Move the hook body 1 laterally to achieve complete disengagement.

[0071] 4. Raise the hook body 1. At this time, the hook body 1 is in an empty hook state. After the next dump truck 3 is in place, the next cycle of lifting will begin.

[0072] It should be noted that the terms "center alignment" and "center overlap" mentioned above are only descriptions of the technology. Because this technology has an allowable deviation, as long as the movement of the operating plate hook is within the predetermined allowable deviation range, the effects of this technology can be achieved.

[0073] Since the hook body 1 enters the lifting lug laterally, the hook body 1 needs to protrude outward. Preferably, the horizontal distance between the inner edge of the second folding plate 10 and the inner edge of the first plate 5 is greater than or equal to the length of the lug 15 plus the length of the lug cap 16.

[0074] The length of the ear rod 15 is greater than the thickness of the second plate 6, and the length of the ear rod 15 minus the thickness of the second plate 6 is greater than or equal to 42 mm. This setting serves two purposes: first, to allow the hook body 1 to have a certain amount of room for movement (i.e., allowable deviation); and second, to ensure that the upper edge of the ear cap 16 does not conflict with the outer edge of the third folding plate 11.

[0075] In summary, the hook provided in this embodiment of the invention allows the gantry crane operator to operate the hook body 1 to hook the lifting lug 4 of the dump truck 3 and then release it, thereby reducing manual labor and costs. By pre-setting the movement trajectory of the hook body 1, the gantry crane can automatically perform lifting, unloading, and unhooking operations. Since no personnel are needed to assist under the dump truck 3, safety hazards caused by the dump truck 3 falling debris or tilting are completely avoided.

[0076] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model. It should be noted that the structures or components illustrated in the accompanying drawings are not necessarily drawn to scale, and descriptions of well-known components, processing techniques, and processes are omitted to avoid unnecessarily limiting the utility model.

Claims

1. A lifting hook for hoisting tunnel boring machine dump trucks, comprising a hook body (1), characterized in that, The hook body (1) is provided with an installation groove (2), which is used to be movably connected or separated from the lifting lug (4) on the dump truck (3); The hook body (1) includes a first plate (5), a second plate (6) and a folding plate (7). One end of the folding plate (7) is connected to the first plate (5) and the other end is connected to the second plate (6). The folding plate (7) protrudes outward from the first plate (5) and the second plate (6), and its inner side forms a groove (8) with the first plate (5) and the second plate (6). The mounting groove (2) is set facing the groove (8).

2. A lifting hook for hoisting tunnel boring machine dump trucks according to claim 1, characterized in that, The folding plate member (7) includes a first folding plate (9), a second folding plate (10) and a third folding plate (11); One end of the first folding plate (9) is connected to the first flat plate (5), and the other end is connected to one end of the second folding plate (10); One end of the third folding plate (11) is connected to the second flat plate (6), and the other end of it is connected to the other end of the second folding plate (10); The third folding plate (11) is parallel to the first flat plate (5) or the second flat plate (6).

3. A lifting hook for hoisting tunnel boring machine dump trucks according to claim 2, characterized in that, The first plate (5) and the second plate (6) are on the same plane, the first folding plate (9) and the second folding plate (10) form an angle of 120°~170°, and the third folding plate (11) and the second folding plate (10) form an angle of 120°~170°.

4. A lifting hook for hoisting tunnel boring machine dump trucks according to claim 2 or 3, characterized in that, The mounting groove (2) includes a first arc-shaped portion (12), an inclined portion (13), and a second arc-shaped portion (14), wherein the inclined portion (13) is located between the first arc-shaped portion (12) and the second arc-shaped portion (14); The first arc-shaped portion (12) is located at the upper end of the second arc-shaped portion (14); The arc diameter of the first arc portion (12) is larger than the arc diameter of the second arc portion (14); The first arc-shaped portion (12) is configured to allow the lug (4) to pass through, and the inclined portion (13) is configured to guide the lug (4) from the first arc-shaped portion (12) into the second arc-shaped portion (14), the second arc-shaped portion (14) being used to limit the lug (4).

5. A lifting hook for hoisting tunnel boring machine dump trucks according to claim 4, characterized in that, The center of the second fold plate (10) is on the same horizontal line as the center of the first arc-shaped part (12).

6. A lifting hook for hoisting tunnel boring machine dump trucks according to claim 3, characterized in that, The first folding plate (9) and the third folding plate (11) are arranged symmetrically with respect to the vertical center line of the first folding plate (9).

7. A lifting hook for hoisting tunnel boring machine dump trucks according to claim 5, characterized in that, The second arc-shaped portion (14) is located on the second flat plate (6), and the first arc-shaped portion (12) is located on the second folding plate (10).

8. A lifting hook for hoisting tunnel boring machine dump trucks according to claim 7, characterized in that, The thickness of the second folding plate (10) and the third folding plate (11) is greater than the thickness of the first flat plate (5).

9. A lifting hook for hoisting tunnel boring machine dump trucks according to claim 8, characterized in that, The bottom of the second plate (6) is arc-shaped.

10. A lifting hook for hoisting tunnel boring machine dump trucks according to claim 4, characterized in that, The width of the first plate (5) is ≥300mm, the minimum distance between the edge of the first arc-shaped part (12) and the outer edge of the second folded plate (10) is ≥100mm, and the distance between the bottom of the second plate (6) and the second arc-shaped part (14) is ≥170mm.

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