Container for working machine and working machine

Abstract

The utility model relates to a container for an operation machine and the operation machine. The container comprises a bottom plate, a plurality of longitudinal beams and a plurality of cross beams which are perpendicular to and intersect with the longitudinal beams. The longitudinal beams are arranged on the lower bottom face of the bottom plate at intervals and define longitudinal cavities. The cross beams are arranged on the lower bottom face of the bottom plate at intervals and define transverse cavities. And a through-flow hole for introducing flue gas in the longitudinal cavity into the transverse cavity is formed in the position, intersected with at least part of the cross beams, of each longitudinal beam. Partition plates are arranged in the transverse cavities of the cross beams opposite to the through-flow holes, and a plurality of resonant cavities corresponding to different frequencies are formed for the longitudinal beams. According to the utility model, the resonant cavities with different volumes are defined to carry out silencing treatment on noise with different frequencies in flue gas, so that the cargo tank has a silencing function, a tail gas silencer connected to an engine in the prior art is omitted, a pipeline of an exhaust system of an operation machine is simplified, and the whole vehicle cost of the operation machine is reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of components for operating machinery, and in particular to a cargo box for operating machinery. This utility model also relates to operating machinery including such a cargo box. Background Technology

[0002] Wide-body dump trucks are a common transportation tool in mining operations. They are often used in conjunction with other machinery such as excavators, loaders, and belt conveyors to form loading, transporting, and unloading production lines for earthwork, sand, gravel, and bulk materials. With the increasing size of mining machinery, wide-body dump trucks have increased tonnage, engine displacement, and exhaust flow, resulting in greater engine exhaust noise and consequently affecting the overall vehicle noise level.

[0003] Existing wide-body dump trucks typically reduce exhaust noise by installing mufflers, thereby lowering overall vehicle noise and improving comfort. However, these mufflers are bulky, difficult to install, and require placement away from the engine, resulting in a complex exhaust piping system and increased costs. Utility Model Content

[0004] The purpose of this utility model is to solve at least one of the above-mentioned problems and / or other problems existing in the prior art.

[0005] To achieve the above objectives, this utility model provides a cargo box for operating machinery, comprising a base plate, a plurality of longitudinal beams, and a plurality of transverse beams perpendicular to and intersecting the longitudinal beams. The longitudinal beams are spaced apart on the lower surface of the base plate and each defines a longitudinal cavity through which flue gas flows. The transverse beams are spaced apart on the lower surface of the base plate and each, together with the base plate, defines a transverse cavity. Each longitudinal beam has a flow hole at its intersection with at least a portion of the transverse beams for introducing flue gas from the longitudinal cavity into the transverse cavity. A baffle is disposed in the transverse cavity of each transverse beam opposite to the flow hole. The distance between the baffle and the corresponding flow hole in these transverse beams connected to the same longitudinal beam via the flow hole is different, thereby forming multiple resonant cavities corresponding to different frequencies for each longitudinal beam, defined by the space between the baffle and the flow hole.

[0006] According to one embodiment of the present invention, multiple crossbeams intersecting the same longitudinal beam are spaced apart to form the resonant cavity.

[0007] According to one embodiment of the present invention, for the same longitudinal beam, the volume of the plurality of resonant cavities varies in a certain regular pattern, for example, decreasing from front to back in the longitudinal direction.

[0008] According to one embodiment of the present invention, the plurality of longitudinal beams include two side longitudinal beams arranged opposite to each other on the transverse sides of the base plate, and the plurality of transverse beams include a plurality of first transverse beams arranged at intervals along the longitudinal direction and extending between the two side longitudinal beams respectively. Each side longitudinal beam is provided with a flow hole corresponding to each first transverse beam at its vertical wall facing the first transverse beam, and each first transverse beam is provided with a partition plate corresponding to these flow holes.

[0009] According to one embodiment of the present invention, the plurality of longitudinal beams further includes two main longitudinal beams arranged opposite to each other between the two side longitudinal beams, and the plurality of transverse beams include a plurality of second transverse beams arranged alternately with the plurality of first transverse beams. The plurality of second transverse beams extend between the two side longitudinal beams respectively. Each main longitudinal beam has a flow hole corresponding to each second transverse beam on its vertical wall facing the corresponding side longitudinal beam, and each second transverse beam has a partition plate opposite to these flow holes.

[0010] According to one embodiment of the present invention, the plurality of crossbeams further includes a side crossbeam disposed at the front end of the base plate. The side crossbeam, alone or together with the base plate, defines a side crossbeam cavity. The side crossbeam cavity is connected to the longitudinal cavities of the side longitudinal beam and the main longitudinal beam via a first through hole and a second through hole, respectively.

[0011] According to one embodiment of the present invention, a first crossbeam adjacent to the side crossbeam is provided with a smoke inlet, and the first crossbeam adjacent to the side crossbeam or the main longitudinal beam is provided with a third through hole that connects the transverse cavity of the first crossbeam to the longitudinal cavities of the two main longitudinal beams respectively.

[0012] On the other hand, the present invention provides a working machine that includes a cargo box as described above.

[0013] According to one embodiment of the present invention, the operating machinery is a wide-body dump truck.

[0014] This invention utilizes a flue gas duct, typically located on the bottom of a wide-body vehicle's cargo box, to heat the bottom of the cargo box by introducing exhaust gases from the engine. Specifically, this flue gas duct forms resonant cavities of varying volumes, which then suppress noise at different frequencies within the exhaust gases. This invention enables the cargo box itself to function as a noise suppressor, eliminating the need for the exhaust muffler commonly found in existing technologies that is connected to the engine. This simplifies the structure of the work machinery, reduces the overall cost of the machinery, and eliminates the need for an exhaust muffler. Attached Figure Description

[0015] The features and advantages of this utility model will become clear from the following detailed description provided with reference to the accompanying drawings. It should be understood that the following drawings are merely schematic and not necessarily drawn to scale, and therefore should not be considered as limitations on this utility model, wherein:

[0016] Figure 1 A perspective view of a cargo box according to an embodiment of the present invention is shown; and

[0017] Figure 2 Shown by Figure 1 A schematic diagram of the resonant cavity formed by the flue gas duct on the bottom of the cargo box.

[0018] Explanation of reference numerals in the attached figures:

[0019] 1. Base plate; 2. Longitudinal beam; 21. Side beam; 211. Flow hole; 22. Main longitudinal beam; 221. Flow hole; 23. Auxiliary longitudinal beam; 3. Crossbeam; 31. First crossbeam; 311. Smoke inlet; 32. Second crossbeam; 33. Side crossbeam; 41. Partition plate; 42. Partition plate; 5. Resonance cavity; 6. First through hole; 7. Second through hole; 8. Third through hole; 91. Smoke inlet; 92. Smoke outlet. Detailed Implementation

[0020] Embodiments of the present invention are described below with reference to the accompanying drawings. In the following description, numerous specific details are set forth to enable those skilled in the art to more fully understand and implement the present invention. However, it will be apparent to those skilled in the art that implementations of the present invention may not include some of these specific details. Furthermore, it should be understood that the present invention is not limited to the specific embodiments described. Rather, the present invention can be conceived to be implemented with any combination of the features and elements described below, regardless of whether they relate to different embodiments. Therefore, the following aspects, features, embodiments, and advantages are for illustrative purposes only and should not be construed as elements or limitations of the claims unless expressly set forth in the claims.

[0021] The terms "first" and "second" are used below to describe the elements of this application. These terms are used only to distinguish the individual elements and not to limit the nature, order, or number of these elements. The terms "comprising" and "having" are used to indicate an open-ended inclusion and mean that there may be additional elements / components besides those listed.

[0022] Figure 1 and Figure 2 The cargo box of a working machine according to one embodiment of the present invention is shown. Figure 1 and Figure 2As shown, the cargo box according to this embodiment may include a cargo box body and a frame structure disposed at the bottom of the cargo box body. The cargo box body may include a bottom plate 1 and side plates. The bottom plate is generally rectangular, and four side plates extend upward from the approximate edge of the bottom plate 1 and connect with each other to form a generally cuboid cargo box body structure. The frame structure may be disposed on the lower surface of the bottom plate 1 and includes a plurality of longitudinal beams 2 and a plurality of transverse beams 3.

[0023] The plurality of longitudinal beams 2 extend along the travel direction of the working machinery or the front-to-back direction of the working machinery or cargo box (hereinafter referred to as the "longitudinal direction"), and are spaced apart on the lower bottom surface of the base plate 1 along the left-to-right direction of the working machinery or cargo box (hereinafter referred to as the "lateral direction"). The cross-sections of these longitudinal beams 2 may be generally rectangular, and they may optionally be fixed to the base plate 1 by welding via the top surface of the longitudinal beams 2, thereby individually defining longitudinal cavities through which exhaust gases from the engine flow. In other embodiments, the cross-sections of the longitudinal beams 2 may also be generally U-shaped, so that when the longitudinal beams 2 are connected to the base plate 1, they can together define the longitudinal cavities with the base plate 1.

[0024] The plurality of crossbeams 3 extend laterally along the working machinery or cargo box and are spaced apart on the lower surface of the base plate 1 along the longitudinal direction of the working machinery or cargo box. The cross-sections of these crossbeams 3 may be approximately U-shaped, thereby defining a transverse cavity together with the base plate 1 when they are connected to the base plate 1. In other embodiments, the cross-sections of these crossbeams 3 may also be approximately rectangular, so as to define a transverse cavity individually.

[0025] Each longitudinal beam 2 extends longitudinally, and each transverse beam 3 extends transversely. Therefore, each transverse beam 3 is perpendicular to and intersects with these longitudinal beams 2. Figure 1 As shown, each longitudinal beam 2 has a greater height in the vertical direction, perpendicular to both the transverse and longitudinal directions, than the intersecting transverse beam 3. Therefore, holes can be made in the two opposing vertical walls of the longitudinal beam 2 through which the transverse beam 3 needs to pass, allowing each transverse beam 3 to pass through and intersect the corresponding longitudinal beam 2 perpendicularly. Similarly, it can be envisioned that the height of the transverse beam 3 is greater than that of the longitudinal beam, allowing holes to be made in the transverse beam 3 for the longitudinal beam 2 to pass through.

[0026] Now for reference Figure 2Each longitudinal beam 2 has a flow hole at its intersection with at least part of the transverse beam 3, allowing flue gas from the longitudinal cavity of the longitudinal beam 2 to be introduced into the transverse cavity of the transverse beam 3. A baffle is installed in the transverse cavity of the transverse beam 3 opposite to the flow hole, forming a closed cavity structure between the vertical wall of the longitudinal beam 2 with the flow hole and the baffle. For different transverse beams 3 connected to the same longitudinal beam 2 via flow holes, the distance from the baffle to the corresponding flow hole is different, thus constructing these closed cavity structures as resonant cavities corresponding to different frequencies. In this way, the sound waves of exhaust noise (i.e., flue gas noise) enter a resonant cavity with a larger cross-section through the smaller cross-section of the flow hole. When the sound waves propagate within the resonant cavity, reflection occurs due to the sudden increase in cross-section. Multiple reflections within the resonant cavity cause the sound wave energy to interfere with each other, and some sound energy is dissipated, thereby achieving a noise reduction effect.

[0027] Optionally, multiple crossbeams 3 intersecting the same longitudinal beam 2 are spaced apart to form resonant cavities. For example, as Figure 1 and Figure 2 As shown, for the same longitudinal beam 2, some of the multiple crossbeams 3 intersecting with it are provided with and form resonant cavities, while other crossbeams 3 do not form resonant cavities relative to the longitudinal beam 2. For example, the crossbeams 3 intersecting with the same longitudinal beam 2 can be alternately (i.e., every other crossbeam 3) provided with resonant cavities associated with the longitudinal beam 2.

[0028] Specifically, the volumes of all resonant cavities associated with the same longitudinal beam 2 (i.e., the distance from the partition in the crossbeam 3 to the corresponding flow holes on the longitudinal beam 2) can vary according to a certain pattern. For example, considering that low-frequency sound waves in exhaust noise require larger resonant cavities and are more difficult to eliminate, it is conceivable that, for the same longitudinal beam 2, the volumes of the resonant cavities associated with that longitudinal beam 2 gradually decrease from front to back in the longitudinal direction, in order to preferentially eliminate low-frequency sound waves. Of course, in other embodiments, the volumes of these resonant cavities may also gradually increase from front to back in the longitudinal direction or be arranged irregularly.

[0029] refer to Figure 1 and Figure 2The plurality of longitudinal beams 2 may include two side longitudinal beams 21 arranged at both transverse ends of the base plate 1. The plurality of transverse beams 3 may include a plurality of first transverse beams 31 arranged at intervals along the longitudinal direction and extending between the two side longitudinal beams 21. Each side longitudinal beam 21 may have a flow hole 211 corresponding to the first transverse beam 31 on its vertical wall facing part or all of the first transverse beam 31, and a partition plate 41 is provided in the first transverse beam 31 opposite to the flow hole 211 and spaced at a certain distance. In this way, a resonant cavity 51 can be formed between the partition plate 41 and the vertical wall of the side longitudinal beam 21, wherein the partition plate 41 may have a profile and size that matches the cavity cross section of the first transverse beam 31 in order to form the closed end wall of the resonant cavity 51.

[0030] exist Figure 1 and Figure 2 In the illustrated embodiment, the plurality of longitudinal beams 2 may further include two main longitudinal beams 22 arranged between the two side longitudinal beams 21. These two main longitudinal beams 22 may be arranged parallel to each other with respect to the two side longitudinal beams 21 and may be substantially symmetrical with respect to the longitudinal centerline of the cargo box. The plurality of crossbeams 3 may further include a plurality of second crossbeams 32 arranged at intervals along the longitudinal direction of the bottom plate 1. The plurality of second crossbeams 32 and the plurality of first crossbeams 31 are arranged alternately and extend in the region between the two side longitudinal beams 21. In this case, each main longitudinal beam 22 may have flow holes 221 corresponding to some or all of the second crossbeams 32 on its outer vertical wall facing the corresponding side longitudinal beam 21, and each second crossbeam 32 may have a partition 42 corresponding to the flow hole 221. Thus, a resonant cavity 52 can be formed between the partition 42 and the outer vertical wall of the main longitudinal beam 21.

[0031] Optionally, refer to Figure 2 The plurality of crossbeams 3 may further include side crossbeams 33. These side crossbeams 33 are disposed on the front side of all the first crossbeams 33 in the longitudinal direction, i.e., at the front end of the base plate 1, and extend in the transverse direction between the two side longitudinal beams 21. Each side crossbeam 33, individually or jointly with the base plate 1, defines a side crossbeam cavity. This side crossbeam cavity can communicate with the longitudinal cavity of the side longitudinal beam 21 via a first through hole 6, and can communicate with the longitudinal cavity of the main longitudinal beam 22 via a second through hole 7. It is understood that when the side crossbeam 33 is connected to the inner wall of the side longitudinal beam 21, the first through hole 6 can be disposed on the inner wall of the side longitudinal beam 21. If the side crossbeam 33 penetrates into the interior of the side longitudinal beam 21, the first through hole 6 can be disposed on the side crossbeam 33. Similarly, the second through hole 7 can also be disposed on the main longitudinal beam 22 or the side crossbeam 33.

[0032] When partitions 41 are respectively provided at both ends of the first crossbeam 31 adjacent to the side crossbeam 33, the enclosed space between the two partitions 41 of the first crossbeam 31 can be used as a smoke inlet channel. A smoke inlet hole 311 can be provided on the front vertical wall of the first crossbeam 31 between the two partitions 41. A smoke inlet cavity with a smoke inlet 91 is provided between the first crossbeam 31 and the side crossbeam 33. The smoke inlet cavity can be connected to the smoke inlet channel in the first crossbeam 31 through the smoke inlet hole 311, and can be connected to the exhaust pipe of the engine of the working machinery through the smoke inlet 91. A third through hole 8 can be provided at the intersection of the first crossbeam 31 and / or the two main longitudinal beams 22 to connect the transverse cavity of the first crossbeam 31 and the longitudinal cavity of the two main longitudinal beams 22. It can be understood that when the first crossbeam 31 penetrates into the interior of the side longitudinal beam 21, the third through hole 8 can be provided on the vertical wall of the first crossbeam 31.

[0033] Optionally, parallel longitudinal reinforcing beams 23 may be provided between the side longitudinal beams 21 and the main longitudinal beams 22, and between the two main longitudinal beams 22. These longitudinal reinforcing beams 23 may be parallel. Smoke outlets 92 may also be provided at the ends of the two side longitudinal beams 21 and the two main longitudinal beams 22 on the side opposite to the side crossbeams 33.

[0034] This utility model also provides a working machine including the above-mentioned cargo box. This working machine can be, in particular, a wide-body dump truck.

[0035] Industrial applicability

[0036] The cargo box of this invention is suitable for operating machinery, especially wide-body dump trucks. However, it should be understood that the cargo box of this invention can also be used for other equipment that requires the installation of a cargo box and needs to reduce engine exhaust noise.

[0037] The following is based on Figure 1 and Figure 2 The illustrated embodiment serves as an example to specifically illustrate the noise reduction process of the cargo box.

[0038] The exhaust gas from the engine enters the transverse cavity of the first first crossbeam 31 located at the front end in the longitudinal direction through the smoke inlet 91 and the smoke inlet hole 311 of the smoke inlet chamber, and flows along the smoke inlet channel between the two partitions 41 of the first crossbeam 31, and then enters the corresponding main longitudinal beam 22 through the two third through holes 8 respectively.

[0039] A portion of the flue gas entering the two main longitudinal beams 22 flows backward along the longitudinal direction. When it flows through the second crossbeam 32, it can enter the resonant cavity 52 located in the second crossbeam 32 through the flow hole 221. These resonant cavities 52 with different volumes can perform noise reduction treatment on the flue gas at different frequencies corresponding to their volumes.

[0040] Another portion of the flue gas entering the two main longitudinal beams 22 flows forward in the longitudinal direction and merges into the side transverse cavity of the side crossbeam 33 through the corresponding second through hole 7. Then, it flows to both sides in the transverse direction and enters the two side longitudinal beams 21 through the first through hole 6. When this flue gas flows in the side longitudinal beams 21, it can enter the resonant cavity 51 located in the first crossbeam 31 through the flow hole 211. These resonant cavities 51 with different volumes can perform noise reduction treatment on the flue gas at different frequencies corresponding to their volumes.

[0041] Finally, the silenced flue gas inside the side longitudinal beam 21 and the main longitudinal beam 22 is discharged through the smoke outlet 92 at the tail end.

[0042] In the cargo box of this invention, multiple longitudinal beams 2, individually or together with the bottom plate 1, form longitudinal cavities through which flue gas flows, thereby heating the bottom of the cargo box by introducing exhaust gas from the engine. Each longitudinal beam 2 has a flow hole at its intersection with at least a portion of the crossbeams 3 to introduce flue gas into the transverse cavity defined by the crossbeams 3. For the same longitudinal beam 2, the distance from the partition in each of the crossbeams 3 to the corresponding flow hole on the longitudinal beam 2 is different. Thus, the partition in the crossbeam 3 and the flow hole in the longitudinal beam 2 can jointly define resonant cavities of different volumes in the crossbeam 3, and the resonant cavities of different volumes can be used to silencing noise of different frequencies in the flue gas. In this way, this invention adds a silencing function to the flue gas flow channel originally used for heating the cargo box, thereby eliminating the need for the exhaust muffler connected to the engine in the prior art, eliminating the installation of the exhaust muffler, simplifying the pipeline of the exhaust system of the working machinery, and reducing the overall cost of the working machinery.

[0043] Various modifications and variations can be made to the embodiments disclosed above without departing from the scope or spirit of this invention. Other embodiments of this invention will be apparent to those skilled in the art based on the practice of this invention disclosed in this specification. This specification and the examples disclosed herein should be considered illustrative only, and the true scope of this invention is defined by the appended claims and their equivalents.

Claims

1. A cargo box for operating machinery, characterized in that, The cargo container includes: Base plate (1); Multiple longitudinal beams (2), the multiple longitudinal beams being spaced apart on the lower bottom surface of the base plate, and each defining a longitudinal cavity through which flue gas flows; and Multiple horizontal beams (3) perpendicular to and intersecting with the multiple longitudinal beams, the multiple horizontal beams being arranged at intervals on the lower bottom surface of the base plate and each defining a transverse cavity together with the base plate; Each longitudinal beam has a flow hole at its intersection with at least part of the transverse beam for introducing flue gas from the longitudinal cavity into the transverse cavity. A baffle is provided in the transverse cavity of the transverse beam opposite to the flow hole. The distance between the baffle and the corresponding flow hole in the transverse beam connected to the same longitudinal beam via the flow hole is different. Thus, multiple resonant cavities corresponding to different frequencies are formed for each longitudinal beam by the space between the baffle and the flow hole.

2. The cargo box according to claim 1, characterized in that, The resonant cavity is formed at intervals by multiple crossbeams intersecting the same longitudinal beam.

3. The cargo box according to claim 1 or 2, characterized in that, For the same longitudinal beam, the volume of the multiple resonant cavities decreases from front to back in the longitudinal direction.

4. The cargo box according to claim 1 or 2, characterized in that, The plurality of longitudinal beams (2) include two side longitudinal beams (21) arranged opposite each other on the transverse sides of the base plate (1), and the plurality of cross beams (3) include a plurality of first cross beams (31) arranged at intervals along the longitudinal direction and extending between the two side longitudinal beams respectively. Each side longitudinal beam (21) is provided with a flow hole (211) corresponding to each first cross beam at its vertical wall facing the first cross beam, and each first cross beam (31) is provided with a partition (41) corresponding to these flow holes.

5. The cargo box according to claim 4, characterized in that, The plurality of longitudinal beams (2) further includes two main longitudinal beams (22) arranged opposite to each other between the two side longitudinal beams (21), and the plurality of cross beams (3) includes a plurality of second cross beams (32) arranged alternately with the plurality of first cross beams (31). The plurality of second cross beams extend between the two side longitudinal beams respectively. Each of the main longitudinal beams (22) has a flow hole (221) corresponding to each second cross beam on its vertical wall facing the side longitudinal beam on the corresponding side. Each of the second cross beams (32) has a partition (42) opposite to these flow holes.

6. The cargo box according to claim 5, characterized in that, The plurality of crossbeams (3) also include a side crossbeam (33) disposed at the front end of the base plate (1). The side crossbeam (33) defines a side crossbeam cavity alone or together with the base plate (1). The side crossbeam cavity is connected to the longitudinal cavities of the side longitudinal beam (21) and the main longitudinal beam (22) via a first through hole (6) and a second through hole (7), respectively.

7. The cargo box according to claim 6, characterized in that, The first crossbeam (31) adjacent to the side crossbeam (33) is provided with a smoke inlet (91). The first crossbeam (31) adjacent to the side crossbeam or the main longitudinal beam (22) is provided with a third through hole (8) that connects the transverse cavity of the first crossbeam to the longitudinal cavity of the two main longitudinal beams respectively.

8. A type of operating machinery, characterized in that, The operating machinery includes a cargo box according to any one of claims 1 to 7.

9. The operating machinery according to claim 8, characterized in that, The operating machinery is a wide-body dump truck.

Images