Bottom compartment structure and engineering vehicle

Abstract

The utility model provides a bottom compartment structure, including bottom plate and many support beams, many support beams all are welded and fixed with bottom plate, many support beams include many longitudinal beams and many cross beams, many longitudinal beams all extend along the front -back direction of bottom plate, many cross beams all extend along the left -right direction of bottom plate, many longitudinal beams are arranged at intervals along the left -right direction, and many longitudinal beams include main longitudinal beam and set up in the auxiliary longitudinal beam of main longitudinal beam left and right sides, many cross beams include many front cross beams, middle cross beam, at least one rear cross beam and tail cross beam that set up in the interval arrangement from front to back, and the front cross beam and rear cross beam all set up between the auxiliary longitudinal beam of left and right sides, and the middle cross beam, at least part rear cross beam and tail cross beam are integral type structure, the utility model discloses still provides an engineering vehicle.

Description

Technical Field

[0001] This utility model relates to the field of engineering machinery technology, and in particular to a chassis structure and engineering vehicle. Background Technology

[0002] Mining dump trucks are large, self-unloading transport vehicles widely used in open-pit mines such as coal mines, iron mines, and copper mines. The cargo box of a mining dump truck is the component that provides loading space for materials. It is generally rectangular in shape and usually consists of five parts: the front box (including the hood), side boxes, bottom box, rear door, and cargo box accessories.

[0003] The cargo box floor is the main load-bearing component, located at the bottom of the cargo box and in direct or indirect contact with the vehicle frame. The floor typically consists of a floor plate and multiple crossbeams and longitudinal beams welded to it. Currently, the floor usually adopts a "ten horizontal and five vertical" structure, meaning five longitudinal beams and ten crossbeams are arranged crosswise on the floor plate. The longitudinal beams and the rear crossbeams are continuous, while the other crossbeams are segmented structures separated by the longitudinal beams. The disadvantage of this structure is that the large number of segmented crossbeams results in a large amount of welding work, making welding difficult, and also reduces the structural strength of the floor. Utility Model Content

[0004] The purpose of this invention is to provide a chassis structure that reduces the number of crossbeams in a segmented structure, thereby reducing the amount of welding and improving the structural strength of the chassis.

[0005] This utility model provides a chassis structure, including a base plate and multiple support beams, all of which are welded and fixed to the base plate. Each support beam includes multiple longitudinal beams and multiple transverse beams. The longitudinal beams extend along the front-rear direction of the base plate, and the transverse beams extend along the left-right direction of the base plate. The longitudinal beams are arranged at intervals along the left-right direction, and each longitudinal beam includes a main longitudinal beam and auxiliary longitudinal beams disposed on the left and right sides of the main longitudinal beam.

[0006] Along the front-to-back direction, the multiple crossbeams include multiple front crossbeams, a middle crossbeam, at least one rear crossbeam, and a tail crossbeam arranged sequentially from front to back; the front crossbeams and the rear crossbeams are both located between the auxiliary longitudinal beams on the left and right sides, and the middle crossbeam, at least part of the rear crossbeams, and the tail crossbeams are integral structures.

[0007] Furthermore, the front crossbeam and the main longitudinal beam are arranged to intersect, and the front crossbeam is a segmented structure separated by the main longitudinal beam.

[0008] Furthermore, there are two main longitudinal beams, which are arranged adjacent to each other along the left-right direction; each front crossbeam includes a first crossbeam and a second crossbeam arranged in segments, the first crossbeam is arranged between adjacent main longitudinal beams and auxiliary longitudinal beams, and the two ends of the first crossbeam are welded and fixed to the adjacent main longitudinal beams and auxiliary longitudinal beams respectively; the second crossbeam is arranged between two adjacent main longitudinal beams, and the two ends of the second crossbeam are welded and fixed to the two adjacent main longitudinal beams respectively.

[0009] Furthermore, the main longitudinal beam includes a front beam section and a rear beam section, the front beam section is located in front of the rear beam section, and the front beam section is welded and fixed to the rear beam section; the wall thickness of the front beam section is greater than the wall thickness of the rear beam section.

[0010] Furthermore, the front beam section includes a first vertical plate, a second vertical plate, and a horizontal plate. The first vertical plate and the second vertical plate are arranged opposite each other at intervals along the left-right direction. The first vertical plate, the horizontal plate, and the second vertical plate are welded together to form a U-shaped structure. The rear beam section is a U-shaped structure formed by bending a whole plate. The thickness of the whole plate is greater than the thickness of the first vertical plate, the horizontal plate, and the second vertical plate.

[0011] Furthermore, the auxiliary longitudinal beam extends from the front end of the base plate to the rear end of the base plate, and the auxiliary longitudinal beam is intersected with the middle cross beam. The auxiliary longitudinal beam is a segmented structure that is separated by the middle cross beam.

[0012] The auxiliary longitudinal beam includes a first beam segment and a second beam segment. The first beam segment is located in front of the middle crossbeam, and the rear end of the first beam segment is welded and fixed to the middle crossbeam. The second beam segment is located behind the middle crossbeam, and the front and rear ends of the second beam segment are welded and fixed to the middle crossbeam and the tail crossbeam, respectively. The two ends of the rear crossbeam are welded and fixed to the second beam segments of the auxiliary longitudinal beams on the left and right sides, respectively.

[0013] Furthermore, the first and second beam segments of each auxiliary longitudinal beam are connected to each other and to the auxiliary longitudinal beams on the left and right sides through the middle cross beam; the bottom structure also includes an exhaust box, which is fixed to the bottom plate; the exhaust box is connected to the front end of one of the auxiliary longitudinal beams, and each auxiliary longitudinal beam has an exhaust hole at its rear end.

[0014] Furthermore, the bottom structure also includes a tilting seat; the main longitudinal beam is disposed on the front side of the middle cross beam, the tilting seat is disposed on the rear side of the middle cross beam, and the tilting seat is located between the auxiliary longitudinal beams on the left and right sides; the rear cross beam is intersected with the tilting seat, and the rear cross beam, which has an integral structure, passes through the tilting seat and does not contact the tilting seat.

[0015] Furthermore, the two ends of the rear crossbeam are welded and fixed to the auxiliary longitudinal beams on the left and right sides respectively; the rear end of the main longitudinal beam is welded and fixed to the middle crossbeam; the flipping seat is welded and fixed to the base plate, and the front and rear ends of the flipping seat are welded and fixed to the middle crossbeam and the tail crossbeam respectively.

[0016] Furthermore, the flipping seat includes a first upright plate, a second upright plate, a middle plate, and a bending plate. The first upright plate and the second upright plate are arranged opposite each other at intervals along the left-right direction, and the middle plate is connected between the first upright plate and the second upright plate. The first upright plate has a notch on the side near the bottom plate, and the second upright plate has a notch on the side near the bottom plate. The bending plate is fixedly installed at the notch of the first upright plate and the second upright plate. The bending plate is bent to form a U-shaped structure, and the rear crossbeam, which is an integral structure, passes through the bending plate without contacting the bending plate.

[0017] This utility model also provides an engineering vehicle, including a cargo box, the cargo box including the bottom box structure described above.

[0018] The bottom box structure provided by this utility model increases the overall structural strength of the bottom box by setting the middle crossbeam and at least part of the rear crossbeam as an integral structure, that is, by adding an integral crossbeam design in the middle and rear part of the bottom box. It also reduces the number of crossbeams in the segmented structure, thereby reducing the amount of welding, facilitating welding operations, and improving production efficiency. Attached Figure Description

[0019] Figure 1 This is a bottom view of the cargo compartment in an embodiment of this utility model.

[0020] Figure 2 This is a bottom view of the chassis structure after the bottom plate has been removed in this embodiment of the present invention.

[0021] Figure 3 This is an exploded structural diagram of the bottom chamber structure after the bottom plate is removed in an embodiment of this utility model.

[0022] Figure 4 for Figure 3 A structural diagram in another direction.

[0023] Figure 5 This is a cross-sectional schematic diagram of the assembly structure of the rear crossbeam and the flip seat in an embodiment of this utility model. Detailed Implementation

[0024] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0025] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification and claims of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0026] The directional terms such as "up," "down," "left," "right," "front," "back," "top," and "bottom" (if present) used in the specification and claims of this utility model are defined according to the position of the structures in the drawings and the relative positions of the structures, and are only for the purpose of clarity and convenience in expressing the technical solution. It should be understood that the use of directional terms should not limit the scope of protection claimed in this application.

[0027] like Figures 1 to 4 As shown, the chassis structure provided in this embodiment of the present invention includes a base plate 1 and multiple support beams. The multiple support beams are all disposed on the lower surface of the base plate 1 and are welded and fixed to the base plate 1. The base plate 1 has a square structure and has mutually perpendicular longitudinal (Y) directions (i.e., the length direction of the base plate 1) and lateral (X) directions (i.e., the width direction of the base plate 1). The multiple support beams include multiple longitudinal beams 2 and multiple transverse beams 3. The cross-sections of the multiple longitudinal beams 2 and multiple transverse beams 3 are all U-shaped, with the U-shaped openings of the multiple longitudinal beams 2 and multiple transverse beams 3 facing the base plate 1. The multiple longitudinal beams 2 extend along the longitudinal (Y) direction of the base plate 1, and the multiple transverse beams 3 extend along the lateral (X) direction of the base plate 1.

[0028] Multiple longitudinal beams 2 are arranged at intervals along the left-right direction X. These longitudinal beams 2 include main longitudinal beams 21 and auxiliary longitudinal beams 22 located on the left and right sides of the main longitudinal beams 21. Specifically, there are two auxiliary longitudinal beams 22, arranged along the left-right direction X, on opposite sides of the main longitudinal beams 21. The main longitudinal beams 21 are an integral structure (i.e., the main longitudinal beams 21 are a continuous structure). Along the left-right direction X, the main longitudinal beams 21 are located near the center of the base plate 1, while the auxiliary longitudinal beams 22 are located at the edges of the left and right sides of the base plate 1.

[0029] Along the front-to-back direction Y, the multiple crossbeams 3 include multiple front crossbeams 31, one middle crossbeam 32, at least one rear crossbeam 33 and one tail crossbeam 34 arranged sequentially from front to back; wherein, along the front-to-back direction Y, the middle crossbeam 32 is located near the middle of the base plate 1, and the tail crossbeam 34 is located at the edge of the rear side of the base plate 1.

[0030] Along the left-right direction X, the front crossbeam 31 and the rear crossbeam 33 are both located between the auxiliary longitudinal beams 22 on the left and right sides. The middle crossbeam 32, at least part of the rear crossbeam 33 and the tail crossbeam 34 are integral structures (i.e., integral through structures).

[0031] The chassis structure provided in this embodiment of the utility model increases the overall structural strength of the chassis (especially the structural strength of the middle and rear parts) by setting the middle crossbeam 32 and at least part of the rear crossbeam 33 as an integral structure, that is, by adding an integral crossbeam design in the middle and rear part of the chassis. Moreover, it reduces the number of crossbeams in the segmented structure, thereby reducing the amount of welding (since the crossbeams in the segmented structure need to be welded to the main longitudinal beam 21 and / or the auxiliary longitudinal beam 22, the more crossbeams in the segmented structure, the greater the amount of welding), which facilitates welding operations and improves production efficiency.

[0032] Furthermore, such as Figures 1 to 4 As shown, in this embodiment, the front crossbeam 31 and the main longitudinal beam 21 are arranged to cross each other. The front crossbeam 31 is a segmented structure that is separated by the main longitudinal beam 21 (that is, the front crossbeam 31 is a disconnected structure, and the front crossbeam 31 is separated at the intersection with the main longitudinal beam 21).

[0033] Furthermore, such as Figures 1 to 4 As shown, in this embodiment, there are two main longitudinal beams 21, which are adjacent and spaced apart along the left-right direction X; there are three front crossbeams 31. Each front crossbeam 31 includes a segmented first crossbeam 311 and a second crossbeam 312. The first crossbeam 311 is located between adjacent main longitudinal beams 21 and auxiliary longitudinal beams 22, and both ends of the first crossbeam 311 are welded and fixed to the adjacent main longitudinal beams 21 and auxiliary longitudinal beams 22, respectively. The second crossbeam 312 is located between two adjacent main longitudinal beams 21, and both ends of the second crossbeam 312 are welded and fixed to the two adjacent main longitudinal beams 21, respectively. Specifically, in this embodiment, each front crossbeam 31 includes two first crossbeams 311 and one second crossbeam 312, wherein one first crossbeam 311 is located between two adjacent main longitudinal beams 21 and auxiliary longitudinal beams 22, and the other first crossbeam 311 is located between the other two adjacent main longitudinal beams 21 and auxiliary longitudinal beams 22.

[0034] Furthermore, such as Figures 1 to 4 As shown, in this embodiment, the multiple crossbeams 3 also include reinforcing crossbeams 35. The reinforcing crossbeams 35 are disposed between two adjacent main longitudinal beams 21, and both ends of the reinforcing crossbeams 35 are welded and fixed to the two adjacent main longitudinal beams 21 respectively. Along the front-rear direction Y, the reinforcing crossbeams 35 are spaced apart from the second crossbeams 312. Specifically, in this embodiment, there are multiple reinforcing crossbeams 35 (three in this embodiment). Along the front-rear direction Y, one reinforcing crossbeam 35 is disposed between the second crossbeam 312 and the middle crossbeam 32, and the other reinforcing crossbeams 35 are disposed between adjacent second crossbeams 312. The reinforcing crossbeams 35 can further improve the overall structural strength of the chassis.

[0035] Furthermore, such as Figures 1 to 4As shown, in this embodiment, the main longitudinal beam 21 is disposed on the front side of the middle cross beam 32. The main longitudinal beam 21 is an integral structure, with its front end located at the front edge of the bottom plate 1, and its rear end welded and fixed to the middle cross beam 32. The main longitudinal beam 21 is used to contact the vehicle frame. Limiting seats 63 are welded to the side wall of the main longitudinal beam 21. The limiting seats 63 are used to abut against the frame to laterally limit the cargo box when the vehicle turns (i.e., apply lateral restraint force to the cargo box). In this embodiment, there are multiple limiting seats 63 (specifically four in this embodiment), and the multiple limiting seats 63 are spaced apart on the two main longitudinal beams 21.

[0036] Furthermore, such as Figures 1 to 4 As shown, in this embodiment, the main longitudinal beam 21 includes a front beam section 211 and a rear beam section 212. The front beam section 211 is located in front of the rear beam section 212, and the front beam section 211 and the rear beam section 212 are welded and fixed together. The wall thickness of the front beam section 211 is greater than the wall thickness of the rear beam section 212 (i.e., the beam wall thickness of the front beam section 211 is greater than the beam wall thickness of the rear beam section 212). Both the front beam section 211 and the rear beam section 212 are provided with limiting seats 63. Specifically, the main longitudinal beam 21 is the main load-bearing part of the cargo box floor. During the transportation process, the road surface is bumpy, and the front end of the main longitudinal beam 21 is more susceptible to pressure from all directions (including vertical pressure applied by materials and lateral pressure when the vehicle turns). By setting the main longitudinal beam 21 as a combination of front beam section 211 and rear beam section 212, the front beam section 211 has a thicker wall, thereby improving the structural strength of the front end of the main longitudinal beam 21 and reducing the occurrence of cracking accidents; while the rear beam section 212 has a relatively thinner wall, which can help reduce the weight of the main longitudinal beam 21 and reduce material costs while meeting the structural strength requirements.

[0037] Furthermore, such as Figures 1 to 4As shown, in this embodiment, the front beam segment 211 includes a first vertical plate 2111, a second vertical plate 2112, and a horizontal plate 2113. The first vertical plate 2111 and the second vertical plate 2112 are arranged opposite each other at intervals in the left-right direction X. The first vertical plate 2111 and the second vertical plate 2112 are both perpendicular to the bottom plate 1, and the horizontal plate 2113 is parallel to the bottom plate 1. The first vertical plate 2111, the horizontal plate 2113, and the second vertical plate 2112 are welded together to form a U-shaped structure. The rear beam segment 212 is a U-shaped structure formed by bending a single plate (i.e., the rear beam segment 212 is formed by bending a single plate, and the entire rear beam segment 212 is a single-piece structure). The thickness of this single plate is greater than the thickness of the first vertical plate 2111, the horizontal plate 2113, and the second vertical plate 2112, thus making the wall thickness of the front beam segment 211 greater than the wall thickness of the rear beam segment 212. The front end of the rear beam segment 212 is inserted into the rear end of the front beam segment 211, and the front end of the rear beam segment 212 is welded and fixed to the rear end of the front beam segment 211, so that the front beam segment 211 and the rear beam segment 212 form a whole. Of course, in other embodiments, the front beam segment 211 can also be a U-shaped structure formed by bending a thick plate.

[0038] Furthermore, such as Figures 1 to 4 As shown, in this embodiment, the auxiliary longitudinal beam 22 extends from the front end of the base plate 1 to the rear end of the base plate 1. The auxiliary longitudinal beam 22 and the middle cross beam 32 are intersected. The auxiliary longitudinal beam 22 is a segmented structure separated by the middle cross beam 32. This allows the middle cross beam 32 to form a continuous structure that runs from left to right.

[0039] The auxiliary longitudinal beam 22 includes a first beam segment 221 and a second beam segment 222, which are arranged in sections. The first beam segment 221 is located in front of the middle crossbeam 32, with its front end at the front edge of the base plate 1 and its rear end welded to the middle crossbeam 32. The second beam segment 222 is located behind the middle crossbeam 32, with its front and rear ends welded to the middle crossbeam 32 and the rear crossbeam 34, respectively. The two ends of the rear crossbeam 33 are welded to the second beam segments 222 of the auxiliary longitudinal beams 22 on the left and right sides, respectively.

[0040] Furthermore, such as Figures 1 to 4As shown, in this embodiment, since both the auxiliary longitudinal beam 22 and the middle cross beam 32 are U-shaped structures, and the U-shaped openings of both the auxiliary longitudinal beam 22 and the middle cross beam 32 face the bottom plate 1, flues (not labeled in the figure) are formed between the auxiliary longitudinal beam 22 and the middle cross beam 32 and the bottom plate 1. The first beam segment 221 and the second beam segment 222 of each auxiliary longitudinal beam 22 are connected through the middle cross beam 32, that is, the flue in the first beam segment 221 of each auxiliary longitudinal beam 22 is connected to the flue in the second beam segment 222 through the middle cross beam 32, and the flues in the auxiliary longitudinal beams 22 on the left and right sides are connected through the middle cross beam 32. Specifically, through holes 321 are provided on the side walls on opposite sides of the middle cross beam 32, and the flues in the auxiliary longitudinal beam 22 are connected to the flues in the middle cross beam 32 through these through holes 321.

[0041] The undercarriage structure also includes an exhaust box 4, which is fixed to the floor plate 1. The exhaust box 4 is connected to the front end of one of the auxiliary longitudinal beams 22, and each auxiliary longitudinal beam 22 has an exhaust port 220 at its rear end. Specifically, the exhaust box 4 is welded and fixed to both the floor plate 1 and the front end of the first beam segment 221 of the auxiliary longitudinal beam 22, and the exhaust port 220 is located at the rear end of the second beam segment 222 of the auxiliary longitudinal beam 22. The exhaust box 4 is used to connect to the power exhaust interface. The high-temperature exhaust gas from the vehicle's engine first enters one of the auxiliary longitudinal beams 22 through the exhaust box 4, then enters the other auxiliary longitudinal beam 22 through the middle cross beam 32, and finally exits through the exhaust port 220 at the rear of the auxiliary longitudinal beam 22, thereby achieving the heating function of the undercarriage and preventing materials from sticking.

[0042] Furthermore, such as Figure 4 As shown, in this embodiment, reinforcing plates 23 are welded inside the main longitudinal beam 21, the auxiliary longitudinal beam 22, the middle cross beam 32, and the tail cross beam 34. The reinforcing plates 23 inside the auxiliary longitudinal beam 22 and the middle cross beam 32 are provided with perforations 231, through which engine exhaust gas can pass through the reinforcing plates 23, thereby avoiding the reinforcing plates 23 from obstructing the transmission of engine exhaust gas.

[0043] Furthermore, such as Figures 1 to 5As shown, in this embodiment, the cargo box structure also includes a tilting seat 5, which is located behind the middle crossbeam 32 and between the auxiliary longitudinal beams 22 on the left and right sides. The tilting seat 5 is used to rotatably connect to the frame via a pin to realize the lifting function of the cargo box. The tilting seat 5 extends in the front-rear direction Y, and is welded and fixed to the bottom plate 1. The front and rear ends of the tilting seat 5 are respectively welded and fixed to the middle crossbeam 32 and the rear crossbeam 34, thereby improving the structural strength of the rear of the cargo box. At the same time, the front end of the tilting seat 5 can also be welded and fixed to the rear end of the main longitudinal beam 21. The rear crossbeam 33 is arranged intersecting with the tilting seat 5; wherein, the rear crossbeam 33, which is an integral structure, passes through the tilting seat 5 and does not contact the tilting seat 5, that is, there is a certain gap between the integral rear crossbeam 33 and the tilting seat 5. This design creates a buffer space between the integral rear crossbeam 33 and the tilting seat 5, thereby reducing the direct transmission of vibrations from the chassis to the floor 1 via the tilting seat 5 (ensuring the rear of the floor has a certain degree of flexibility) and reducing the risk of the floor cracking.

[0044] Furthermore, such as Figures 1 to 5 As shown, in this embodiment, the flip-up seat 5 includes a first upright plate 51, a second upright plate 52, a middle plate 53, a bent plate 54, and a cover plate 55. The first upright plate 51 and the second upright plate 52 are arranged opposite each other at intervals in the left-right direction X, and both the first upright plate 51 and the second upright plate 52 extend in the front-back direction Y. Both the first upright plate 51 and the second upright plate 52 are perpendicular to the base plate 1. The first upright plate 51 and the second upright plate 52 are used to rotatably connect to the frame via pins. The middle plate 53 is connected between the first upright plate 51 and the second upright plate 52. Specifically, the opposite sides of the middle plate 53 are welded and fixed to the side walls of the first upright plate 51 and the second upright plate 52, respectively, thereby forming the flip-up seat 5 into a box-shaped structure. The cover plate 55 is welded and fixed to the front ends of the first upright plate 51 and the second upright plate 52. Both the first upright plate 51 and the second upright plate 52, located on the side near the bottom plate 1, have U-shaped notches 50. A bent plate 54 is fixedly installed at the notches 50 of the first and second upright plates 51 and 52, specifically, the bent plate 54 is welded to the first and second upright plates 51 and 52. The bent plate 54 is bent to form a U-shaped structure, and the integral rear crossbeam 33 passes through the bent plate 54 without contacting it; that is, there is a certain gap between the integral rear crossbeam 33 and the bent plate 54.

[0045] Furthermore, such as Figures 1 to 4As shown, in this embodiment, there are two flip seats 5, which are arranged at intervals along the left-right direction X. Along the front-back direction Y, the two flip seats 5 correspond to the two main longitudinal beams 21 respectively. There are multiple rear crossbeams 33, which are arranged at intervals along the front-back direction Y. Specifically, there are three rear crossbeams 33. The middle rear crossbeam 33 is a segmented structure (i.e., a disconnected structure) separated by the flip seats 5. This rear crossbeam 33 is divided into three segments, and the two ends of each segment are welded and fixed to the auxiliary longitudinal beams 22 / flip seats 5 respectively. The two rear crossbeams 33 on the front and back sides are integral structures, and the two ends of these two rear crossbeams 33 are welded and fixed to the auxiliary longitudinal beams 22 on the left and right sides respectively. Of course, in other embodiments, all rear crossbeams 33 may be integral structures.

[0046] Furthermore, such as Figures 1 to 4 As shown, in this embodiment, multiple shock-absorbing pads 61 are spaced apart on the main longitudinal beam 21 and the tilting seat 5. The shock-absorbing pads 61 can play a shock-absorbing role when the bottom box contacts the frame. In this embodiment, there are ten shock-absorbing pads 61, eight of which are respectively set on the two main longitudinal beams 21 and fixed with bolts, and the other two shock-absorbing pads 61 are respectively set on the cover plates 55 of the two tilting seats 5 and fixed with bolts.

[0047] Furthermore, such as Figures 1 to 4 As shown, in this embodiment, the bottom chamber structure also includes a mudguard bracket 62 and a stone-crushing device seat 64. The mudguard bracket 62 is mounted on the auxiliary longitudinal beams 22 on both the left and right sides, and is fixed to the auxiliary longitudinal beams 22 and the bottom plate 1 by welding; the mudguard bracket 62 is used to connect with the mudguard. The stone-crushing device seat 64 is welded and fixed to the auxiliary longitudinal beams 22 on both the left and right sides, and is used to connect with the stone-crushing plate.

[0048] like Figure 1 As shown, this embodiment also provides an engineering vehicle, including a cargo box, which includes the floor structure described above. The engineering vehicle includes, but is not limited to, a mining dump truck, etc.

[0049] Furthermore, such as Figure 1 As shown, in this embodiment, the cargo box also includes a front compartment (not shown), a cap 7, side compartments 8, and a rear door (not shown). The front compartment and cap 7 are located on the front side of the bottom plate 1, and the side compartments 8 are located on the left and right sides of the bottom plate 1. Reinforcing ribs 81 are welded on the side compartments 8 (it should be noted that since the side compartments 8 have an arc-shaped structure, the side compartments 8 can be seen in the bottom view of the cargo box). The rear door is located on the rear side of the bottom plate 1.

[0050] The advantages of the bottom chamber structure in this embodiment include:

[0051] 1. By setting the middle crossbeam 32 and at least part of the rear crossbeam 33 as an integral structure, that is, by adding an integral crossbeam design in the middle and rear part of the bottom box, the overall structural strength of the bottom box is increased (especially the structural strength in the middle and rear part of the bottom box), and the number of crossbeams in the segmented structure is reduced, thereby reducing the amount of welding, facilitating welding operations, and improving production efficiency.

[0052] 2. The overall structure of the bottom box adopts an "eight horizontal and four vertical" structure, that is, the longitudinal beams 2 include two main longitudinal beams 21 and two auxiliary longitudinal beams 22, and the cross beams 3 include three front cross beams 31, one middle cross beam 32, three rear cross beams 33 and one tail cross beam 34. Compared with the traditional "ten horizontal and five vertical" structure, the structure of the bottom box is simplified, the material consumption of the bottom box is reduced, and lightweight design is achieved on the basis of meeting the structural strength of the bottom box.

[0053] 3. By setting the main longitudinal beam 21 as a combination of front beam segment 211 and rear beam segment 212, the front beam segment 211 has a thicker wall, thereby improving the structural strength of the front end of the main longitudinal beam 21 and reducing the occurrence of cracking accidents; while the rear beam segment 212 has a relatively thinner wall, which can help reduce the weight of the main longitudinal beam 21 and reduce material costs while meeting the structural strength requirements.

[0054] 4. The integrated rear crossbeam 33 passes through the tilting seat 5 without contacting it, thus creating a buffer space between the integrated rear crossbeam 33 and the tilting seat 5. This reduces the direct transmission of vibrations from the chassis to the floor 1 through the tilting seat 5, thereby reducing the risk of cracking in the floor.

[0055] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A chassis structure, characterized in that, It includes a base plate (1) and multiple support beams, all of which are welded and fixed to the base plate (1); the multiple support beams include multiple longitudinal beams (2) and multiple transverse beams (3), the multiple longitudinal beams (2) extend along the front-back direction (Y) of the base plate (1), and the multiple transverse beams (3) extend along the left-right direction (X) of the base plate (1); the multiple longitudinal beams (2) are arranged at intervals along the left-right direction (X), and the multiple longitudinal beams (2) include a main longitudinal beam (21) and auxiliary longitudinal beams (22) arranged on the left and right sides of the main longitudinal beam (21). Along the front-to-back direction (Y), the multiple crossbeams (3) include multiple front crossbeams (31), middle crossbeams (32), at least one rear crossbeam (33), and tail crossbeams (34) arranged sequentially from front to back; the front crossbeams (31) and the rear crossbeams (33) are both located between the auxiliary longitudinal beams (22) on the left and right sides, and the middle crossbeam (32), at least part of the rear crossbeams (33), and the tail crossbeams (34) are integral structures.

2. The bottom chamber structure as described in claim 1, characterized in that, The front crossbeam (31) is intersected with the main longitudinal beam (21), and the front crossbeam (31) is a segmented structure separated by the main longitudinal beam (21).

3. The bottom chamber structure as described in claim 2, characterized in that, The number of main longitudinal beams (21) is two, and the two main longitudinal beams (21) are arranged adjacent to each other along the left-right direction (X); each front crossbeam (31) includes a first crossbeam (311) and a second crossbeam (312) arranged in segments. The first crossbeam (311) is arranged between the adjacent main longitudinal beams (21) and the auxiliary longitudinal beams (22), and the two ends of the first crossbeam (311) are welded and fixed to the adjacent main longitudinal beams (21) and the auxiliary longitudinal beams (22) respectively; the second crossbeam (312) is arranged between the two adjacent main longitudinal beams (21), and the two ends of the second crossbeam (312) are welded and fixed to the two adjacent main longitudinal beams (21) respectively.

4. The bottom chamber structure as described in claim 1, characterized in that, The main longitudinal beam (21) includes a front beam section (211) and a rear beam section (212). The front beam section (211) is located in front of the rear beam section (212), and the front beam section (211) is welded and fixed to the rear beam section (212). The wall thickness of the front beam section (211) is greater than the wall thickness of the rear beam section (212).

5. The bottom chamber structure as described in claim 4, characterized in that, The front beam section (211) includes a first vertical plate (2111), a second vertical plate (2112), and a horizontal plate (2113). The first vertical plate (2111) and the second vertical plate (2112) are arranged opposite each other at intervals along the left-right direction (X). The first vertical plate (2111), the horizontal plate (2113), and the second vertical plate (2112) are welded together to form a U-shaped structure. The rear beam section (212) is a U-shaped structure formed by bending a whole plate. The thickness of the whole plate is greater than the thickness of the first vertical plate (2111), the horizontal plate (2113), and the second vertical plate (2112).

6. The bottom chamber structure as described in claim 1, characterized in that, The auxiliary longitudinal beam (22) extends from the front end of the base plate (1) to the rear end of the base plate (1). The auxiliary longitudinal beam (22) is intersected with the middle cross beam (32). The auxiliary longitudinal beam (22) is a segmented structure separated by the middle cross beam (32). The auxiliary longitudinal beam (22) includes a first beam segment (221) and a second beam segment (222). The first beam segment (221) is located on the front side of the middle crossbeam (32), and the rear end of the first beam segment (221) is welded and fixed to the middle crossbeam (32). The second beam segment (222) is located on the rear side of the middle crossbeam (32), and the front and rear ends of the second beam segment (222) are welded and fixed to the middle crossbeam (32) and the tail crossbeam (34) respectively. The two ends of the rear crossbeam (33) are welded and fixed to the second beam segment (222) of the auxiliary longitudinal beam (22) on the left and right sides respectively.

7. The bottom chamber structure as described in claim 6, characterized in that, The first beam segment (221) and the second beam segment (222) of each of the auxiliary longitudinal beams (22) are connected to each other and to each other on the left and right sides through the middle cross beam (32); the bottom box structure also includes an exhaust box (4), which is fixed to the bottom plate (1); the exhaust box (4) is connected to the front end of one of the auxiliary longitudinal beams (22), and the rear end of each auxiliary longitudinal beam (22) is provided with an exhaust hole (220).

8. The chassis structure as described in any one of claims 1-7, characterized in that, The bottom structure also includes a flip seat (5); the main longitudinal beam (21) is located on the front side of the middle cross beam (32), the flip seat (5) is located on the rear side of the middle cross beam (32), and the flip seat (5) is located between the auxiliary longitudinal beams (22) on the left and right sides; the rear cross beam (33) is intersected with the flip seat (5), and the rear cross beam (33) with an integral structure passes through the flip seat (5) and does not contact the flip seat (5).

9. The bottom chamber structure as described in claim 8, characterized in that, The flip-up seat (5) includes a first upright plate (51), a second upright plate (52), a middle plate (53), and a bent plate (54). The first upright plate (51) and the second upright plate (52) are arranged opposite each other at intervals along the left-right direction (X). The middle plate (53) is connected between the first upright plate (51) and the second upright plate (52). The first upright plate (51) and the second upright plate (52) are both provided with notches (50) on the side near the bottom plate (1). The bent plate (54) is fixedly arranged at the notches (50) of the first upright plate (51) and the second upright plate (52). The bent plate (54) is bent to form a U-shaped structure. The rear crossbeam (33), which is an integral structure, passes through the bent plate (54) and does not contact the bent plate (54).

10. An engineering vehicle, comprising a cargo box, characterized in that, The cargo compartment includes the floor structure as described in any one of claims 1-9.

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