A bottom guard plate assembly and a dump truck

Abstract

This utility model relates to the field of dump truck technology, and more particularly to a bottom guard plate assembly and a dump truck. The bottom guard plate assembly includes a first guard plate portion, a second guard plate portion, and a first connecting portion. A hinge portion is provided on one side of the first guard plate portion for hinged connection to the front frame of the dump truck. The second guard plate portion is detachably connected to the side of the first guard plate portion away from the hinge portion. After the second and first guard plate portions are connected, a cavity is formed that can cover a target structure on the front frame. The first connecting portion connects to the first guard plate portion and / or the second guard plate portion, and is used to detachably fix the first and / or second guard plate portions to the front frame of the dump truck. This utility model can solve the problem of time-consuming and labor-intensive removal of the entire bottom guard plate from the front frame in the prior art, thereby improving the efficiency of engine and radiator maintenance for dump trucks, especially articulated dump trucks.

Description

Technical Field

[0001] This utility model relates to the field of dump truck technology, and in particular to a bottom guard plate assembly and a dump truck. Background Technology

[0002] Articulated dump trucks are widely used in harsh working environments such as potholes, muddy roads, and steep slopes due to their good passability and strong driving ability. Therefore, when they are driving, their bottom is easily hit by flying stones, mud, etc., which can damage the engine and other components. Therefore, articulated dump trucks are usually equipped with underbody protection plates to protect the engine and radiator on the front frame of the dump truck.

[0003] In existing technology, the underbody protection plate is generally composed of a single piece of iron plate and is usually fixed to the front frame by a large number of bolts. Therefore, when maintaining the engine or radiator, the underbody protection plate needs to be removed and installed, which makes the maintenance of the engine and radiator very inconvenient. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art or related technologies.

[0005] Therefore, this utility model provides a bottom guard plate assembly that can solve the problem of time-consuming and laborious removal of the entire bottom guard plate from the front frame in the prior art.

[0006] This utility model also provides a dump truck including the above-mentioned bottom guard plate assembly.

[0007] A bottom guard plate assembly according to a first aspect of the present invention, applied to a dump truck, includes:

[0008] The first guard plate has a hinge on one side, which is used to hinge with the front frame of the dump truck.

[0009] The second skid plate is detachably connected to the side of the first skid plate away from the hinge; after the second skid plate and the first skid plate are connected, they form a cavity that can cover the target structure on the front frame.

[0010] The first connecting part is connected to the first guard plate part and / or the second guard plate part, and is used to detachably fix the first guard plate part and / or the second guard plate part to the front frame of the dump truck.

[0011] Optionally, the first guard plate includes:

[0012] The first protective plate has a first side and a second side arranged opposite to each other, as well as a third side and a fourth side arranged opposite to each other; the first side of the first protective plate is provided with a hinge portion, and the second side of the first protective plate is detachably connected to the second protective plate portion;

[0013] Two first side plates are respectively connected to the third and fourth sides of the first protective plate and are symmetrically arranged relative to the central axis of the first protective plate; the first protective plate and the two first side plates form a first sub-cavity that can cover a part of the target structure.

[0014] Optionally, the first protective plate includes a first region and a second region that are connected to each other, with the first region and the second region at a preset angle; the first part of the first side plate that connects to the second region is rectangular, the second part of the first side plate that connects to the first region is triangular, and the width of the side of the second part of the first side plate away from the hinge is the same as the width of the second part of the first side plate.

[0015] Optionally, the second guard plate includes:

[0016] The second protective plate has a first side and a second side disposed opposite to each other, as well as a third side and a fourth side disposed opposite to each other; the first side of the second protective plate is detachably connected to the second side of the first protective plate.

[0017] Two second side plates are respectively connected to the third and fourth sides of the second protective plate and are symmetrically arranged relative to the central axis of the second protective plate; the second protective plate and the two second side plates form a second sub-cavity that can cover another part of the target structure.

[0018] Optionally, it also includes:

[0019] The inspection door is located on the second protective plate and is used to close or open the second sub-cavity.

[0020] Optionally, an access panel is provided on the second protective plate, and one side of the access panel is hinged to the second protective plate. The access panel is used to close or open the access panel.

[0021] Optionally, the first connecting part includes:

[0022] The first bracket is located on the third side of the first protective plate or the third side of the second protective plate, and is connected to the first side plate connected to the third side of the first protective plate, and / or connected to the second side plate connected to the third side of the first protective plate. The first bracket can be detachably connected to the front frame by the first bolt.

[0023] The second bracket is located on the fourth side of the first protective plate or the fourth side of the second protective plate, and is connected to the first side plate connected to the fourth side of the first protective plate, and / or connected to the second side plate connected to the third side of the first protective plate. The second bracket can be detachably connected to the front frame by the second bolt.

[0024] Optionally, the first guard plate portion and the second guard plate portion are detachably connected via a second connecting portion; the second connecting portion includes:

[0025] A connecting plate is provided along the length of the bottom guard plate assembly and is partially located on the surface of the first guard plate portion, with the other part located on the surface of the second guard plate portion;

[0026] The third bolt allows the portion of the connecting plate located on the first protective plate to be detachably connected to the first protective plate via the third bolt.

[0027] The fourth bolt allows the connecting plate to be detachably connected to the second guard plate by means of another part of the second guard plate.

[0028] Optionally, the hinge portion includes:

[0029] The connecting cylinder is connected to the side of the first guard plate that is away from the second guard plate.

[0030] The connecting shaft can be inserted into the connecting cylinder and can rotate axially within the connecting cylinder; both ends of the connecting shaft can be fixedly connected to the mounting holes on the front frame.

[0031] A dump truck according to a second aspect of the present invention is characterized in that it includes the bottom guard plate assembly of the first aspect and various embodiments.

[0032] One of the above technical solutions has at least the following advantages or beneficial effects:

[0033] In one embodiment of this utility model, a bottom guard plate assembly is provided. A hinged joint connects the first guard plate to the front frame of the dump truck. A first connecting joint then detachably fixes the first and / or second guard plates to the front frame, thus securing the entire bottom guard plate assembly to the front frame. This allows for easy maintenance of the target structure covered by the cavity formed by the first and second guard plates. Simply release the first connecting joint from the front frame, flip the first guard plate, and the bottom guard plate assembly can be removed from the target structure, facilitating maintenance. Therefore, this utility model solves the problem of time-consuming and labor-intensive removal of the entire bottom guard plate from the front frame in existing technologies, improving the efficiency of engine and radiator maintenance for dump trucks, especially articulated dump trucks.

[0034] The dump truck provided in this embodiment of the utility model is equipped with the bottom guard plate assembly described above. Since the bottom guard plate assembly has the above-mentioned technical effects, the dump truck equipped with the bottom guard plate assembly should also have the corresponding technical effects. Attached Figure Description

[0035] Figure 1 A schematic diagram of the bottom guard plate assembly structure according to an embodiment of the present invention is shown;

[0036] Figure 2A schematic diagram of the bottom guard plate assembly according to an embodiment of the present invention is shown;

[0037] Figure 3 A schematic diagram of a bottom guard assembly according to an embodiment of the present invention being flipped on the front frame is shown.

[0038] [Explanation of Labels in the Attached Image]

[0039] 1. First protective plate section; 101. First protective plate; 102. First side plate; 1011. First area; 1012. Second area;

[0040] 2. Second protective plate section, 201. Second protective plate, 202. Second side plate;

[0041] 3. First connecting part; 301. First bracket; 302. Second bracket;

[0042] 4. Hinge part, 401. Connecting cylinder, 402. Connecting shaft;

[0043] 5. Inspection door;

[0044] 6. Second connecting part, 601. Connecting plate, 602. Third bolt, 603. Fourth bolt. Detailed Implementation

[0045] To better explain and facilitate understanding of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0046] In existing technology, the underbody protection plate is generally located at the bottom of the front frame of a dump truck, typically used to protect the engine and radiator. It is usually made of a single piece of iron, with air intake grilles on the front or sides to facilitate radiator cooling. The underbody protection plate is usually secured to the front frame with numerous bolts, making it very inconvenient to remove and install during engine maintenance. Furthermore, because the underbody protection plate is generally heavy, it needs to be manually lifted when changing engine oil and filters, thus increasing the safety risks for maintenance personnel.

[0047] To address at least one of the technical problems existing in the prior art or related technologies, this utility model provides a bottom guard plate assembly. The assembly includes a first guard plate portion, a second guard plate portion, and a first connecting portion. A hinge portion is provided on one side of the first guard plate portion for hinged connection to the front frame of a dump truck. The second guard plate portion is detachably connected to the side of the first guard plate portion away from the hinge portion. The connection of the second and first guard plate portions forms a cavity that can cover a target structure on the front frame. The first connecting portion connects to the first and / or second guard plate portions for detachably fixing the first and / or second guard plate portions to the front frame of the dump truck. This utility model solves the problem of time-consuming and labor-intensive removal of the entire bottom guard plate from the front frame in the prior art, thereby improving the efficiency of engine and radiator maintenance for dump trucks, especially articulated dump trucks.

[0048] The following description, with reference to the accompanying drawings, describes some embodiments of the underbody protection plate assembly and dump truck provided by the present invention.

[0049] See Figures 1 to 3 This utility model provides an embodiment of a bottom guard plate assembly applied to a dump truck. The bottom guard plate assembly includes a first guard plate part 1, a second guard plate part 2, and a first connecting part 3. A hinge part 4 is provided on one side of the first guard plate part 1, which is used to hinge with the front frame of the dump truck. The second guard plate part 2 is detachably connected to the side of the first guard plate part 1 away from the hinge part 4. After the second guard plate part 2 and the first guard plate part 1 are connected, a cavity is formed that can cover the target structure on the front frame. The first connecting part 3 is connected to the first guard plate part 1 and / or the second guard plate part 2, and the first connecting part 3 is used to detachably fix the first guard plate part 1 and / or the second guard plate part 2 to the front frame of the dump truck.

[0050] It should be noted that the target structure on the front frame can be either an engine mounted on the front frame or a radiator mounted on the front frame.

[0051] When the target structure is a radiator, since the radiator does not require maintenance, when a radiator malfunctions and needs repair, after the first connecting part 3 is released from its fixation on the front frame, the first protective plate part 1 can be rotated on the front frame with the hinge part 4 as the rotation center, so that the entire underbody protection assembly can rotate on the front frame and the underbody protection assembly can be removed from covering the radiator on the front frame, thereby facilitating the maintenance of the radiator by the staff.

[0052] Furthermore, by detachably connecting the first guard plate 1 and the second guard plate 2, the connection flexibility between the first guard plate 1 and the second guard plate 2 can be improved, thereby facilitating the replacement or maintenance of the first guard plate 1 or the second guard plate 2.

[0053] In this embodiment, the first underbody protection plate 1 is hinged to the front frame of the dump truck using the hinge part 4, and the first connecting part 3 is used to detachably fix the first underbody protection plate 1 and / or the second underbody protection plate 2 to the front frame of the dump truck, thus fixing the entire underbody protection plate assembly to the front frame. This allows for easy maintenance of the target structure covered by the cavity formed by the first underbody protection plate 1 and the second underbody protection plate 2. Simply release the first connecting part 3 from the front frame, flip the first underbody protection plate 1, and the underbody protection plate assembly can be removed from the target structure, facilitating maintenance by repair personnel. Therefore, this invention solves the problem of time-consuming and labor-intensive removal of the entire underbody protection plate from the front frame in the prior art, improving the efficiency of engine and radiator maintenance for dump trucks, especially articulated dump trucks.

[0054] In some possible embodiments, the first protective plate 1 includes a first protective plate 101 and two first side plates 102. The first protective plate 101 has a first side and a second side disposed opposite to each other, as well as a third side and a fourth side disposed opposite to each other. The first side of the first protective plate 101 is provided with a hinge portion 4, and the second side of the first protective plate 101 is detachably connected to the second protective plate 2. The two first side plates 102 are respectively connected to the third side and the fourth side of the first protective plate 101 and are symmetrically arranged relative to the central axis of the first protective plate 101. The first protective plate 101 and the two first side plates 102 form a first sub-cavity that can cover a part of the target structure.

[0055] The first protective plate 101 and the two first side plates 102 can be welded together from thin iron plates. The first protective plate 101 and the two first side plates 102 can be provided with alternating horizontal and vertical ribs on the side closest to the target structure to improve the strength of the first protective plate 101 and the two first side plates 102 respectively. This ensures that the strength of the first protective plate 1 can resist the impact of road bumps or flying stones when the dump truck is driving on a bumpy road or a road with many stones.

[0056] In this embodiment, by selecting the structure of the first protective plate 1 as including a first protective plate 101 and two first side plates 102, and connecting the two first side plates 102 to the third and fourth sides of the first protective plate 101 respectively, the first sub-cavity formed by the first protective plate 101 and the two first side plates 102 can protect three sides of a part of the target structure, that is, protect the side of the part of the target structure away from the front frame and the two sides opposite to the side of the part of the target structure, so as to improve the safety of protecting the part of the target structure.

[0057] Furthermore, the first protective plate 101 includes a first region 1011 and a second region 1012 that are connected to each other, and the first region 1011 and the second region 1012 are at a preset angle; the first part of the first side plate 102 connected to the second region 1012 is rectangular, the second part of the first side plate 102 connected to the first region 1011 is triangular, and the width of the side of the second part of the first side plate 102 away from the hinge part 4 is the same as the width of the second part of the first side plate 102.

[0058] It should be noted that the preset angle is no less than 90°.

[0059] In this embodiment, by connecting the first region 1011 and the second region 1012 of the first protective plate 101 at a preset angle, and by making the first part of the first side plate 102 connected to the second region 1012 rectangular and the second part of the first side plate 102 connected to the first region 1011 triangular, the first sub-cavity formed by the first protective plate 101 and the two first side plates 102 can protect a part of the target structure on all four sides. That is, it can protect the side of the target structure away from the front frame, the two sides opposite to the side of the target structure, and the side of the target structure near the hinge part 4, so as to achieve comprehensive protection of the target structure by the first protective plate part 1.

[0060] Furthermore, the second protective plate 2 includes a second protective plate 201 and two second side plates 202. The second protective plate 201 has a first side and a second side arranged opposite to each other, as well as a third side and a fourth side arranged opposite to each other. The first side of the second protective plate 201 is detachably connected to the second side of the first protective plate 101. The two second side plates 202 are respectively connected to the third side and the fourth side of the second protective plate 201 and are symmetrically arranged relative to the central axis of the second protective plate 201. The second protective plate 201 and the two second side plates 202 form a second sub-cavity that can cover another part of the target structure.

[0061] When the first side of the second protective plate 201 is detachably connected to the second side of the first protective plate 101, the first side of the second protective plate 201 and the second side of the first protective plate 101 are in contact to avoid the problem of stones entering due to a large gap between the first protective plate 101 and the second protective plate 201.

[0062] The second protective plate 201 and the two second side plates 202 can be welded from thin iron plates. The second protective plate 201 and the two second side plates 202 can be provided with alternating horizontal and vertical ribs on the side closest to the target structure to improve the strength of the second protective plate 201 and the two second side plates 202 respectively. This ensures that the second protective plate 2 can withstand the impact of road bumps or flying stones when the dump truck is driving on bumpy or rocky roads.

[0063] In this embodiment, by selecting the structure of the second guard plate 2 as including the second guard plate 201 and two second side plates 202, and connecting the two second side plates 202 to the third and fourth sides of the second guard plate 201 respectively, the second sub-cavity formed by the second guard plate 201 and the two second side plates 202 can protect three sides of another part of the target structure, that is, protect the side of the other part of the target structure away from the front frame, and the two sides opposite to the side of the other part of the target structure, so as to improve the safety of the protection of the other part of the target structure.

[0064] Furthermore, the bottom guard plate assembly also includes an inspection door 5, which is located on the second guard plate 201 and is used to close or open the second sub-cavity.

[0065] Here, at least two angle iron reinforcing plates are welded to the side of the inspection door 5 closest to the target structure to increase the strength of the inspection door 5. Drainage holes are provided on the inspection door 5 to prevent rainwater from entering and being unable to drain.

[0066] In this embodiment, by providing an inspection door 5 on the second protective plate 201, it is convenient for staff to maintain and service the target structure located in the second sub-cavity.

[0067] Specifically, an inspection port is provided on the second protective plate 201, and one side of the inspection door 5 is hinged to the second protective plate 201. The inspection door 5 is used to close or open the inspection port.

[0068] When the target structure is an engine, the access port is opened at the position of the second protective plate 201 corresponding to the oil pan and filter of the engine, so that the staff can inspect the oil pan and filter of the engine after flipping the access door 5.

[0069] Here, when the target structure does not need to be inspected, the inspection door 5 can be detachably fixed to the second protective plate 201 with bolts to prevent the inspection door 5 from failing to keep the inspection opening closed due to vibration during the dump truck's operation; when the target structure needs to be inspected, the bolts used to fix the inspection door 5 to the second protective plate 201 can be removed, and then the inspection door 5 can be flipped over to open the inspection opening.

[0070] In this embodiment, by selecting the maintenance door 5 used to close or open the access port as a hinged connection with the second protective plate 201, the staff can close or open the second sub-cavity by flipping the maintenance door 5 on the second protective plate 201, thereby facilitating the staff to inspect and maintain the target structure.

[0071] In some possible embodiments, the first connecting part 3 includes a first bracket 301 and a second bracket 302. The first bracket 301 is located on the third side of the first protective plate 101 or the third side of the second protective plate 201, and is connected to the first side plate 102 connected to the third side of the first protective plate 101, and / or connected to the second side plate 202 connected to the third side of the first protective plate 101. The first bracket 301 can be detachably connected to the front frame by a first bolt. The second bracket 302 is located on the fourth side of the first protective plate 101 or the fourth side of the second protective plate 201, and is connected to the first side plate 102 connected to the fourth side of the first protective plate 101, and / or connected to the second side plate 202 connected to the third side of the first protective plate 101. The second bracket 302 can be detachably connected to the front frame by a second bolt.

[0072] It should be noted that the third side of the first protective plate 101 and the third side of the second protective plate 201 are located on the same side of the bottom protective plate assembly, and the fourth side of the first protective plate 101 and the fourth side of the second protective plate 201 are located on the same side of the bottom protective plate assembly.

[0073] Preferably, the first bracket 301 can be detachably connected to the first side plate 102 and / or the second side plate 202 by bolts, and the second bracket 302 can be detachably connected to the first side plate 102 and / or the second side plate 202 by bolts, so as to improve the connection flexibility between the first bracket 301 and the second bracket 302 and the first side plate 102 and the second side plate 202 respectively, thereby facilitating the replacement or maintenance of the first bracket 301 and the second bracket 302.

[0074] Since the underbody protection plate assembly provided in this embodiment is generally installed below the transmission oil cooler of the dump truck, the number of the first bracket 301 can be selected as one and the number of the second bracket 302 can be selected as two, so as to facilitate the installation of the underbody protection plate assembly on the front frame.

[0075] In this embodiment, by providing a first bracket 301 and a second bracket 302 on both sides of the first protective plate 101 and / or the second protective plate 201 respectively, and connecting the first bracket 301 to the first side plate 102 and / or the second side plate 202, and connecting the second bracket 302 to the second side plate 202 and / or the second side plate 202, the first bracket 301 and the second bracket 302 can be fixed on both sides of the first protective plate 101 and / or the second protective plate 201. After the bottom guard plate assembly rotates to the target position with the hinge part 4 as the axis, the first bracket 301 can be detachably connected to the front frame by the first bolt, and the second bracket 302 can be detachably connected to the front frame by the second bolt, thereby achieving the protection of the target structure by the bottom guard plate assembly.

[0076] In some possible embodiments, the first protective plate portion 1 and the second protective plate portion 2 are detachably connected by a second connecting portion 6; the second connecting portion 6 includes a connecting plate 601, a third bolt 602 and a fourth bolt 603, the connecting plate 601 is disposed along the length direction of the bottom protective plate assembly and is partially located on the surface of the first protective plate portion 1, and the other part is located on the surface of the second protective plate portion 2; the third bolt 602 connects the portion of the connecting plate 601 located in the first protective plate portion 1 to the first protective plate portion 1 by the third bolt 602; the fourth bolt 603 connects the other portion of the connecting plate 601 located in the second protective plate portion 2 to the second protective plate portion 2 by the fourth bolt 603.

[0077] In this embodiment, the second connecting part 6 is selected as having a structure including a connecting plate 601, a third bolt 602 and a fourth bolt 603, which enables the first protective plate part 1 and the second protective plate part 2 to be detachably connected, thereby improving the connection flexibility between the first protective plate part 1 and the second protective plate part 2, and facilitating the replacement or maintenance of the first protective plate part 1 or the second protective plate part 2.

[0078] In some possible embodiments, the hinge portion 4 includes a connecting cylinder 401 and a connecting shaft 402. The connecting cylinder 401 is connected to the side of the first guard plate portion 1 away from the second guard plate portion 2. The connecting shaft 402 can be inserted into the connecting cylinder 401 and can rotate axially within the connecting cylinder 401. Both ends of the connecting shaft 402 can be fixedly connected to the mounting holes on the front frame.

[0079] Here, after the two ends of the connecting shaft 402 are inserted into the mounting holes on the front frame, the connecting shaft 402 can be axially fixed in the mounting holes by means of washers and cotter pins, so as to achieve a fixed connection between the two ends of the connecting shaft 402 and the mounting holes on the front frame.

[0080] In this embodiment, see Figure 3By selecting the hinge part 4 as a structure including the connecting cylinder 401 and the connecting shaft 402, after the fixed connection between the first connecting part 3 and the front frame is released, the first guard plate part 1 can be flipped on the front frame with the connecting shaft 402 as the axis of rotation, thereby realizing the flipping of the entire under guard plate assembly on the front frame.

[0081] One embodiment of the present invention provides a dump truck, including a bottom guard plate assembly as described in any of the above embodiments.

[0082] Since the dump truck of this embodiment includes any of the bottom guard plate components in the first aspect above, it has the beneficial effects of any of the above embodiments, which will not be repeated here.

[0083] In the description of this utility model, it should be understood that 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 indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0084] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0085] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0086] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "exemplary embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. 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 different embodiments or examples.

[0087] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A skirting assembly for use on a dump truck, the skirting assembly comprising: include: The first guard plate has a hinge on one side, which is used to hinge with the front frame of the dump truck. The second protective plate is detachably connected to the side of the first protective plate away from the hinge portion; after the second protective plate and the first protective plate are connected, they form a cavity that can cover the target structure on the front frame. A first connecting portion is connected to the first guard plate portion and / or the second guard plate portion for detachably fixing the first guard plate portion and / or the second guard plate portion to the front frame of the dump truck.

2. The underguard assembly of claim 1, wherein, The first protective plate includes: The first protective plate has a first side and a second side arranged opposite to each other, as well as a third side and a fourth side arranged opposite to each other; the first side of the first protective plate is provided with a hinge portion, and the second side of the first protective plate is detachably connected to the second protective plate portion; Two first side plates are respectively connected to the third and fourth sides of the first protective plate and are symmetrically arranged relative to the central axis of the first protective plate; the first protective plate and the two first side plates form a first sub-cavity that can cover a part of the target structure.

3. The underguard assembly of claim 2, wherein, The first protective plate includes a first region and a second region that are connected to each other, and the first region and the second region are at a preset angle; the first part of the first side plate that connects to the second region is rectangular, the second part of the first side plate that connects to the first region is triangular, and the width of the side of the second part of the first side plate away from the hinge is the same as the width of the second part of the first side plate.

4. The underguard assembly of claim 2, wherein, The second protective plate includes: The second protective plate has a first side and a second side disposed opposite to each other, and a third side and a fourth side disposed opposite to each other; the first side of the second protective plate is detachably connected to the second side of the first protective plate. Two second side plates are respectively connected to the third and fourth sides of the second protective plate and are symmetrically arranged relative to the central axis of the second protective plate; the second protective plate and the two second side plates form a second sub-cavity that can cover another part of the target structure.

5. The underguard assembly of claim 4, wherein, Also includes: An inspection door is provided on the second protective plate, and the inspection door is used to close or open the second sub-cavity.

6. The underguard assembly of claim 5, wherein, The second protective plate has an inspection port, and one side of the inspection door is hinged to the second protective plate. The inspection door is used to close or open the inspection port.

7. The bottom protection plate assembly according to claim 4, characterized in that, The first connecting part includes: The first bracket is located on the third side of the first protective plate or the third side of the second protective plate, and is connected to the first side plate connected to the third side of the first protective plate, and / or connected to the second side plate connected to the third side of the first protective plate. The first bracket can be detachably connected to the front frame by a first bolt. The second bracket is located on the fourth side of the first protective plate or the fourth side of the second protective plate, and is connected to the first side plate connected to the fourth side of the first protective plate, and / or connected to the second side plate connected to the third side of the first protective plate. The second bracket can be detachably connected to the front frame by a second bolt.

8. The bottom protective plate assembly according to claim 1, characterized in that, The first protective plate portion and the second protective plate portion are detachably connected via a second connecting portion; the second connecting portion includes: A connecting plate is provided along the length direction of the bottom guard plate assembly and is partially located on the surface of the first guard plate portion, with the other part located on the surface of the second guard plate portion; The third bolt allows the portion of the connecting plate located at the first protective plate to be detachably connected to the first protective plate via the third bolt. The fourth bolt allows the connecting plate to be detachably connected to the second protective plate by means of another portion of the connecting plate located on the second protective plate.

9. The bottom guard plate assembly according to any one of claims 1 to 8, characterized in that, The hinge portion includes: A connecting cylinder is connected to the side of the first protective plate portion away from the second protective plate portion; The connecting shaft can be inserted into the connecting cylinder and can rotate axially within the connecting cylinder; both ends of the connecting shaft can be fixedly connected to the mounting holes on the front frame.

10. A dump truck, characterized in that, Includes the bottom guard assembly as described in any one of claims 1 to 9.

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