Lightweight cargo compartment for mining dump truck, cargo compartment manufacturing method and cargo compartment supporting rubber pad adjusting method

Abstract

The invention discloses a light-weight cargo compartment for a mining dump truck, a cargo compartment manufacturing method and a cargo compartment supporting rubber pad adjusting method. The light-weight cargo compartment comprises a front baffle, a left baffle, a right baffle, a bottom bearing frame and an internal rubber pad. The front baffle is fixedly installed on the top face of the front side of the bottom bearing frame, the left baffle and the right baffle are fixedly installed on the top faces of the left side and the right side of the bottom bearing frame respectively, and the front ends of the left baffle and the right baffle are fixedly connected with the front baffle. The whole bottom bearing frame is hollowed out, a plurality of lightening holes are distributed in the bottom bearing frame, and the internal rubber pad is laid on the bottom bearing frame and covers all the lightening holes. A traditional cargo compartment design is replaced by the design that the baffles and the bottom bearing frame are adopted, and the inner rubber pad is laid on the bottom frame, meanwhile, the bottom bearing frame is integrally hollowed out, and the lightening holes are distributed in the bottom bearing frame, so that the overall weight of the cargo compartment can be remarkably reduced on the premise that the overall strength and rigidity of the cargo compartment are guaranteed, and the weight of the cargo compartment is reduced. And the fuel consumption of the whole vehicle is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of cargo compartments for mining dump trucks, and in particular to a lightweight cargo compartment for mining dump trucks, a cargo compartment manufacturing method, and a cargo compartment supporting rubber pad adjustment method. Background Art

[0002] At present, the cargo compartment structure of mining dump trucks is mostly supported by bottom cross beams and longitudinal beams, with wear-resistant plates laid on the upper part, the rear part is connected to the longitudinal beam through a hinged support, and the front part is in contact with the surface of the longitudinal beam through multiple groups of rubber pads. In order to ensure the overall structural strength, rigidity and integrity of the cargo compartment, this structure is made of a large amount of steel and the wear-resistant plates are also made of thicker steel, which results in a larger overall weight of the cargo compartment and increases the fuel consumption of the vehicle.

[0003] Furthermore, since the cargo compartment floor has a greater impact on the overall structure during unloading and full-load transportation, the welds on the cargo compartment will be subjected to greater stress, which can easily lead to weld cracking, thereby reducing the reliability of the welds and shortening the service life of the welds.

[0004] In addition, the thickness adjustment of the rubber pad at the front of the cargo box currently relies mainly on experience rather than quantitative adjustment. It is impossible to quantitatively evaluate the load balance of the rubber pad. Non-uniform load will cause serious shear damage to the frame, thereby shortening the service life of the frame and posing a safety hazard. Summary of the invention

[0005] In view of this, the present invention provides a lightweight cargo box for a mining dump truck, which has a lower overall weight while ensuring sufficient structural strength and rigidity.

[0006] To achieve the above object, the present invention provides the following technical solutions: A lightweight cargo box for a mining dump truck comprises a front baffle, a left baffle, a right baffle, a bottom bearing frame and an internal rubber pad.

[0007] Among them, the front baffle is fixedly installed on the top surface of the front side of the bottom bearing frame, the left baffle and the right baffle are respectively fixedly installed on the top surfaces of the left and right sides of the bottom bearing frame, and the front ends are fixedly connected to the front baffle; the bottom bearing frame as a whole adopts a hollow design, with multiple weight-reducing holes distributed on it, and the internal rubber pad is laid and fixed on the bottom bearing frame, covering all the weight-reducing holes.

[0008] Preferably, the bottom supporting frame is manufactured by a segmented casting method, and the whole includes frame casting one, frame casting two, frame casting three, frame casting four, frame casting five, frame casting six, frame casting seven and frame casting eight, and the frame castings are fixed by welding to form the bottom supporting frame.

[0009] Preferably, the butt welds between the castings are arranged in non-high stress areas of the cargo box frame.

[0010] Preferably, each frame casting adopts a hollow design inside, and the tube wall thickness of each frame casting can be set separately according to the overall load-bearing layout of the cargo compartment, and the setting range of the tube wall thickness is 10-25mm.

[0011] Preferably, the bottom supporting frame includes a front supporting structure, which is arranged at the front end of the bottom supporting frame, and the front baffle is welded and fixed to the top surface of the front side of the front supporting structure, and the front supporting structure is composed of the front supporting structures of the frame casting one, the frame casting two, the frame casting three and the frame casting four.

[0012] Preferably, the inner rubber pad is laid on the front supporting structure.

[0013] Preferably, the bottom supporting frame includes a left side supporting structure and a right side supporting structure, and the left side supporting structure and the right side supporting structure are symmetrically arranged on the left and right sides of the bottom supporting frame, and the left baffle and the right baffle are respectively welded and fixed on the top surface of the left side supporting structure and the top surface of the right side supporting structure, and the left side supporting structure and the right side supporting structure are jointly composed of the side supporting structures of the frame casting one, the frame casting four, the frame casting five, the frame casting six, the frame casting seven and the frame casting eight.

[0014] Preferably, the inner rubber pad is laid on both the left side supporting structure and the right side supporting structure.

[0015] Preferably, the same number of mounting through holes are symmetrically arranged on the left and right sides of the bottom supporting frame, each of the mounting through holes is provided with a mounting cylinder seat, and a gas spring is installed in each of the mounting cylinder seats; a plurality of steel wire ropes are passed through the internal rubber pad, and both ends of each of the steel wire ropes extend out of the internal rubber pad and are respectively passed through the corresponding mounting cylinder seat to be connected to the gas spring in the mounting cylinder seat.

[0016] Preferably, the lightweight cargo box for the mining dump truck further comprises two sets of supporting rubber pads which are installed on the bottom longitudinal beam of the bottom load-bearing frame and distributed on the frame longitudinal beams on both sides.

[0017] Preferably, each group of the supporting rubber pads comprises a plurality of rubber pad blocks, and adjacent rubber pad blocks are spaced apart from each other. The thickness of each rubber pad block can be quantitatively adjusted to balance the loads of the supporting rubber pads on the left and right sides.

[0018] Preferably, the rubber pad includes a pad body and an adjusting pad, and the overall thickness of the rubber pad can be adjusted by replacing the adjusting pads with different thicknesses.

[0019] The present invention also discloses a quantitative adjustment method of a supporting rubber pad, which is applied to the supporting rubber pad, and specifically comprises: The assembly structure of the cargo compartment, supporting rubber pads and frame longitudinal beams is three-dimensionally modeled, and a finite element analysis is performed on the assembly structure to obtain the finite element analysis results; the computer learns the finite element analysis results based on the machine deep learning method to explore the relationship between the load between the cargo compartment and the frame longitudinal beam and the distance between the cargo compartment and the frame longitudinal beam, and finally obtains the relationship between the load between the cargo compartment and the frame longitudinal beam and the deformation of the cargo compartment and the frame longitudinal beam under load X1; the computer learns the finite element analysis results based on the machine deep learning method and combines the rubber nonlinear stiffness curve to obtain the relationship between the load between the cargo compartment and the frame longitudinal beam and the compression of the rubber pad X2; a high-resolution camera is used to take pictures of the coordination of the cargo compartment, supporting rubber pads and frame longitudinal beams under full load conditions, and the pictures are imported into the computer to calculate The computer identifies and analyzes the image based on visual recognition technology, obtains the compression deformation of each rubber pad and the deformation of the cargo compartment and the frame longitudinal beam at each rubber pad, and calculates the distance D between the cargo compartment and the frame longitudinal beam at each rubber pad under the full load condition based on the deformation data; under the full load condition and the load between the cargo compartment and the frame longitudinal beam on each rubber pad is approximately equal, and the error is controlled within ±10%, the computer can calculate the thickness of each rubber pad to be increased or decreased based on the relationship X1 between the load between the cargo compartment and the frame longitudinal beam and the deformation under load of the cargo compartment and the frame longitudinal beam, the relationship X2 between the load between the cargo compartment and the frame longitudinal beam and the compression of the rubber pad, and the distance D between the cargo compartment and the frame longitudinal beam at each rubber pad under the full load condition.

[0020] Preferably, the finite element analysis of the assembly structure includes: applying loads of different sizes between the cargo compartment and the frame longitudinal beam to each rubber pad, and setting multiple groups of load size schemes with different combinations to perform multiple finite element analyses to obtain the final finite element analysis results.

[0021] The present invention also discloses a method for manufacturing a lightweight cargo box for a mining dump truck, which is applied to the above-mentioned lightweight cargo box for a mining dump truck, and includes: performing three-dimensional modeling on the entire cargo box, and performing finite element analysis on the model; obtaining data such as the load-bearing layout and stress distribution of the cargo box according to the finite element analysis; optimizing the tube wall thickness of each frame casting of the bottom load-bearing frame of the cargo box according to the load-bearing layout data; optimizing the weld layout between each frame casting of the bottom load-bearing frame according to the stress distribution data; manufacturing each component of the cargo box according to the optimized model, and assembling each component to manufacture the cargo box.

[0022] The beneficial effects of the present invention are as follows: compared with the prior art, the lightweight cargo box for a mining dump truck disclosed in the present application replaces the traditional cargo box design by adopting a baffle plus a bottom load-bearing frame and laying an internal rubber pad on the bottom frame. At the same time, the bottom load-bearing frame as a whole adopts a hollow design with multiple weight-reducing holes distributed thereon. In this way, the overall weight of the cargo box can be significantly reduced while ensuring the overall strength and rigidity of the cargo box, and the fuel consumption of the entire vehicle can be reduced.

[0023] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic structural diagram of a lightweight cargo box for a mining dump truck disclosed in an embodiment of the present application; Figure 2 It is a structural schematic diagram of a bottom load-bearing frame of a lightweight cargo compartment for a mining dump truck disclosed in an embodiment of the present application; Figure 3 It is an exploded view of the bottom load-bearing frame of the lightweight cargo compartment of a mining dump truck disclosed in the embodiment of the present application; Figure 4 It is a schematic diagram of a lifting cylinder support and a rear articulated support of a lightweight cargo compartment for a mining dump truck disclosed in an embodiment of the present application; Figure 5 1 is a schematic diagram of the structure of an internal rubber pad for a lightweight cargo compartment of a mining dump truck disclosed in an embodiment of the present application; Figure 6 It is a cross-sectional view of the lightweight cargo box for a mining dump truck disclosed in an embodiment of the present application.

[0025] Reference numerals: 1. Front baffle; 2. Left baffle; 3. Right baffle; 4. Bottom bearing frame; 41. Frame casting one; 42. Frame casting two; 43. Frame casting three; 44. Frame casting four; 45. Frame casting five; 46. Frame casting six; 47. Frame casting seven; 48. Frame casting eight; 49. Weight reduction hole; 5. Internal rubber pad; 51. Steel wire rope (not all shown in the figure); 6. Front support structure; 7. Support rubber pad; 71. Rubber pad; 8. Left side support structure; 9. Right side support structure; 10. Mounting through holes (not all shown in the figure); 20. Mounting cylinder seat (not all shown in the figure); 30. Oil and gas spring (not all shown in the figure); 40. Frame longitudinal beam; 50. Lifting cylinder support; 60. Rear hinge support. DETAILED DESCRIPTION

[0026] The invention discloses a lightweight cargo box for a mining dump truck, which has a lower overall weight while ensuring sufficient structural strength and rigidity.

[0027] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0028] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0029] Reference below Figures 1 to 6 A lightweight cargo box for a mining dump truck in an embodiment of the present invention is described.

[0030] Disclosed in an embodiment of the present application is a lightweight cargo compartment for a mining dump truck, comprising: a front baffle 1, a left baffle 2, a right baffle 3, a bottom bearing frame 4 and an internal rubber pad 5.

[0031] Among them, the front baffle 1 is fixedly mounted on the top surface of the front side of the bottom supporting frame 4, the left baffle 2 and the right baffle 3 are respectively fixedly mounted on the top surfaces of the left and right sides of the bottom supporting frame 4, and the front ends are fixedly connected to the front baffle 1; the setting of the front baffle 1, the left baffle 2 and the right baffle 3 can block and intercept the goods in the cargo compartment, preventing the goods in the cargo compartment from falling out of the cargo compartment, or the goods rushing forward to hit the cab and causing harm to the driver.

[0032] In some embodiments, the bottoms of the left baffle 2 and the right baffle 3 are respectively welded and fixed to the top surfaces on the left and right sides of the bottom supporting frame 4 , and the front ends of the left baffle 2 and the right baffle 3 are welded and fixed to the front baffle 1 .

[0033] In some embodiments, for example Figure 1 As shown, a brim is also provided at the front upper end of the front baffle 1 .

[0034] In the design of the cargo compartment of a traditional mining dump truck, the cargo compartment is often a whole body welded together with multiple steel plates. In order to ensure the overall structural strength and rigidity of the cargo compartment, the overall thickness of the steel plates is relatively large. At the same time, the weight of the wear-resistant plates laid in the cargo compartment is also relatively large. Therefore, the overall weight of the cargo compartment of a traditional mining dump truck is relatively large, which will increase the difficulty of assembling the cargo compartment and increase the fuel consumption of the entire vehicle.

[0035] In this embodiment, the cargo compartment as a whole adopts a design of a baffle plate plus a bottom bearing frame 4, and an internal rubber pad 5 is laid and fixed on the bottom bearing frame 4. Replacing the traditional wear-resistant plate with the internal rubber pad 5 can effectively reduce the overall weight, for example Figure 2 As shown, the bottom supporting frame 4 adopts a hollow design as a whole, and a plurality of weight-reducing holes 49 are distributed on it. Such a design can effectively reduce the overall weight of the bottom supporting frame 4 while ensuring that the bottom supporting frame 4 has sufficient strength and rigidity, thereby effectively reducing the overall weight of the cargo compartment and reducing the fuel consumption of the whole vehicle; the internal rubber pad 5 has excellent buffering and energy absorption capabilities. On the one hand, it can separate the cargo from the bottom supporting structure to prevent the cargo from causing damage to the bottom supporting structure; on the other hand, it can effectively absorb the overall impact force of the cargo on the cargo compartment during loading and the vibration caused by the shaking of the cargo when the whole vehicle is running, effectively protecting the safety of the overall structure of the cargo compartment and extending the service life of the cargo compartment. It is laid on the bottom supporting frame 4 as a whole, and covers all the weight-reducing holes 49 to prevent the cargo from leaking from the weight-reducing holes 49.

[0036] In some embodiments, a lifting cylinder support 50 and a rear hinge support 60 are further provided at the bottom of the bottom supporting frame 4 .

[0037] In some embodiments, for example Figure 3 As shown, the bottom supporting frame 4 is manufactured by a segmented casting method, and the whole includes a frame casting 1 41, a frame casting 2 42, a frame casting 3 43, a frame casting 44, a frame casting 5 45, a frame casting 6 46, a frame casting 7 47 and a frame casting 8 48, and the frame castings are fixed by welding to form the bottom supporting frame 4.

[0038] By using the segmented casting method to cast the cargo compartment, the difficulty of manufacturing the entire cargo compartment can be effectively reduced. At the same time, since the cargo compartment is divided into multiple castings, it is more convenient and quicker to transport each segment of the casting. In addition, segmented casting is also convenient for making the weight-reducing hole 49 structure on the bottom load-bearing frame 4, so as to better reduce the weight of the entire cargo compartment.

[0039] Furthermore, the butt welds between the castings are arranged in the non-high stress area of ​​the cargo box frame. When welding the steel plates of the traditional cargo box, the welds are often located in the high stress area of ​​the cargo box as a whole. The welds in the high stress area are easily affected by the high stress and crack, thereby causing damage to the cargo box. In this embodiment, by adopting the segmented casting method, when the bottom bearing structure is segmented, the welding positions between the castings can be adjusted and designed so that the butt welds between the castings are located in the non-high stress area of ​​the cargo box as a whole, thereby avoiding the problem of easy cracking of the welds on the cargo box, ensuring the safety of the cargo box, and extending the service life of the cargo box.

[0040] In some embodiments, for example Figure 3 and Figure 4 As shown, each frame casting adopts a hollow design inside, and the wall thickness of each frame casting can be set according to the overall load-bearing layout of the cargo compartment, and the setting range of the wall thickness is 10-25mm. The hollow design inside the casting can further reduce the weight of the bottom load-bearing frame 4, so that the overall weight of the cargo compartment can be further reduced, and fuel consumption can be further optimized.

[0041] Furthermore, since the loads on different parts of the bottom supporting frame 4 are different, the strength and rigidity requirements of the corresponding castings are also different. Therefore, for castings with relatively large loads, the tube wall thickness can be increased accordingly to ensure sufficient strength and rigidity. For castings with relatively small loads, the tube wall thickness can be reduced accordingly to save materials and reduce the overall weight.

[0042] In some embodiments, for example Figure 2 As shown, the bottom supporting frame 4 includes a front supporting structure 6, which is arranged at the front end of the bottom supporting frame 4, and the front baffle 1 is welded and fixed on the top surface of the front side of the front supporting structure 6. The front supporting structure 6 is composed of the front supporting structure 6 of frame casting 1 41, frame casting 2 42, frame casting 3 43 and frame casting 4 44.

[0043] The front support structure 6 is used to carry the goods in the front of the cargo compartment and to block and support the goods, effectively preventing the goods from causing damage to the rear of the cab when rushing forward, and can effectively intercept the goods in the cargo compartment and protect the safety of the cab and the driver. The front baffle 1 installed on the upper end of the front support structure 6 can increase the interception height and interception range of the front of the cargo compartment, and due to the presence of the front support structure 6, the interception ability of the front baffle 1 can be significantly improved, and the interception effect is excellent.

[0044] Furthermore, an inner rubber pad 5 is laid on the front support structure 6, for example Figure 2As shown, the front support structure 6 is also provided with a weight-reducing hole 49, on which an internal rubber pad 5 is laid. On one hand, the internal rubber pad 5 can cover the weight-reducing hole 49 to prevent the cargo from leaking from the weight-reducing hole 49; on the other hand, the internal rubber pad 5 can buffer and absorb the impact of the cargo to reduce the impact on the front support structure 6, thereby extending the service life of the front support structure 6.

[0045] In some embodiments, for example Figure 2 As shown, the bottom supporting frame 4 includes a left side supporting structure 8 and a right side supporting structure 9, which are symmetrically arranged on the left and right sides of the bottom supporting frame 4, and the left baffle 2 and the right baffle 3 are welded and fixed on the top surface of the left side supporting structure 8 and the top surface of the right side supporting structure 9 respectively, and the left side supporting structure 8 and the right side supporting structure 9 are composed of the side supporting structures of frame casting 1 41, frame casting 44, frame casting 5 45, frame casting 6 46, frame casting 7 47 and frame casting 8 48.

[0046] The left side support structure 8 and the right side support structure 9 are used to carry the goods on the left and right sides of the cargo compartment and to block and support the goods on both sides, which can effectively intercept the goods in the cargo compartment. The left baffle 2 installed on the left side support structure 8 and the right baffle 3 installed on the right side support structure 9 can increase the interception height and interception range on the left and right sides of the cargo compartment, and due to the existence of the left side support structure 8 and the right side support structure 9, the interception ability of the left baffle 2 and the right baffle 3 can be significantly improved, and the interception effect is excellent.

[0047] Furthermore, the left side supporting structure 8 and the right side supporting structure 9 are both provided with internal rubber pads 5, for example Figure 2 As shown, the left side supporting structure 8 and the right side supporting structure 9 are both provided with weight-reducing holes 49, and internal rubber pads 5 are laid thereon. On one hand, the internal rubber pads 5 can cover the weight-reducing holes 49 to prevent the cargo from leaking from the weight-reducing holes 49; on the other hand, the internal rubber pads 5 can buffer and absorb the impact of the cargo to reduce the impact on the left side supporting structure 8 and the right side supporting structure 9, thereby extending the service life of the left side supporting structure 8 and the right side supporting structure 9.

[0048] In some embodiments, for example Figure 2 As shown, the same number of mounting through holes 10 are symmetrically arranged on the left and right sides of the bottom supporting frame 4, each mounting through hole 10 is provided with a mounting cylinder seat 20, and a gas spring 30 is installed in each mounting cylinder seat 20; a plurality of steel wire ropes 51 are passed through the internal rubber pad 5, and both ends of each steel wire rope 51 extend out of the internal rubber pad 5 and are respectively passed through the corresponding mounting cylinder seat 20 to be connected with the gas spring 30 in the mounting cylinder seat 20.

[0049] In this embodiment, both ends of the steel wire rope 51 are tightened by the oil-gas springs 30 on both sides so that the steel wire rope 51 in the internal rubber pad 5 is in a taut state, thereby forming an externally suspended damping structure. The externally suspended damping structure can absorb the impact caused by the cargo in the cargo compartment when the vehicle turns or the cargo compartment is subjected to lateral force, so as to reduce the impact of the impact on the cargo compartment.

[0050] In some embodiments, for example Figure 1 and Figure 6 As shown, the lightweight cargo box for a mining dump truck further includes two sets of supporting rubber pads which are installed on the bottom longitudinal beams of the bottom load-bearing frame 4 and distributed on the frame longitudinal beams 40 on both sides.

[0051] The supporting rubber pad 7 can support the bottom of the bottom supporting frame. When the cargo compartment is loaded or the road conditions are bumpy, the supporting rubber pad 7 can absorb the impact force transmitted from the cargo compartment to reduce the impact force on the frame longitudinal beam 40, thereby ensuring the safety of the frame longitudinal beam 40.

[0052] Furthermore, each group of supporting rubber pads 7 includes a plurality of rubber pads 71 ​​, and adjacent rubber pads 71 ​​are spaced apart from each other. The thickness of each rubber pad 71 can be quantitatively adjusted to balance the loads of the supporting rubber pads 7 on the left and right sides.

[0053] The thickness of the supporting rubber pad 7 under the cargo box of the existing mining dump truck is mostly adjusted based on experience, and cannot be quantitatively evaluated based on data for quantitative adjustment. Therefore, the overall load of the supporting rubber pad 7 under the existing cargo box is unbalanced, and the unbalanced load can easily cause serious shear damage to the frame.

[0054] In this embodiment, by quantitatively adjusting the thickness of the rubber pad 71 , the load on the entire supporting rubber pad 7 can be balanced, thereby preventing shear damage to the frame.

[0055] In some embodiments, the rubber pad 71 includes a pad body and an adjusting pad. The overall thickness of the rubber pad 71 can be adjusted by replacing the adjusting pads with different thicknesses.

[0056] The present invention also discloses a quantitative adjustment method of a supporting rubber pad, which is applied to the supporting rubber pad 7 in the above embodiment, and specifically comprises: The assembly structure of the cargo box, the supporting rubber pad 7 and the frame longitudinal beam 40 is three-dimensionally modeled, and the assembly structure is subjected to finite element analysis, and the finite element analysis results are obtained.

[0057] The computer learns the finite element analysis results based on the machine deep learning method to explore the relationship between the load between the cargo box and the frame longitudinal beam 40 and the distance between the cargo box and the frame longitudinal beam 40, and finally derives the relationship X1 between the load between the cargo box and the frame longitudinal beam 40 and the deformation of the cargo box and the frame longitudinal beam 40 under load.

[0058] The computer learns the finite element analysis results based on a machine deep learning method and combines the rubber nonlinear stiffness curve to obtain a relationship X2 between the load between the cargo box and the frame longitudinal beam 40 and the compression amount of the rubber pad 71.

[0059] A high-resolution camera is used to capture pictures of the coordination of the cargo compartment, the supporting rubber pad 7 and the frame longitudinal beam 40 under full load conditions, and the pictures are imported into a computer. The computer recognizes and analyzes the pictures based on visual recognition technology to obtain the compression deformation of each rubber pad 71 and the deformation of the cargo compartment and the frame longitudinal beam 40 at each rubber pad 71, and calculates the distance D between the cargo compartment and the frame longitudinal beam 40 at each rubber pad 71 under full load conditions based on the deformation data.

[0060] Under the premise that the loads between the cargo compartment and the frame longitudinal beam 40 on each rubber pad 71 are approximately equal and the error is controlled within ±10%, the computer can calculate the thickness of each rubber pad 71 to be increased or decreased based on the relationship X1 between the loads between the cargo compartment and the frame longitudinal beam 40 and the deformation of the cargo compartment and the frame longitudinal beam 40 under load, the relationship X2 between the loads between the cargo compartment and the frame longitudinal beam 40 and the compression of the rubber pad, and the distance D between the cargo compartment and the frame longitudinal beam 40 at each rubber pad 71 under the fully loaded condition.

[0061] Furthermore, the finite element analysis of the assembly structure includes: applying different sizes of loads between the cargo compartment and the frame longitudinal beam 40 to each rubber pad 71, and setting multiple groups of different combinations of load size schemes to perform multiple finite element analyses to obtain the final finite element analysis results.

[0062] The present invention also discloses a method for manufacturing a lightweight cargo box for a mining dump truck, which is applied to the lightweight cargo box for a mining dump truck in the above-mentioned embodiment, and comprises: performing three-dimensional modeling on the entire cargo box, and performing finite element analysis on the model; obtaining data such as the load-bearing layout and stress distribution of the cargo box according to the finite element analysis; optimizing the tube wall thickness of each frame casting of the bottom load-bearing frame 4 of the cargo box according to the load-bearing layout data; optimizing the weld layout between each frame casting of the bottom load-bearing frame 4 according to the stress distribution data; manufacturing each component of the cargo box according to the optimized model, and assembling each component to manufacture the cargo box.

[0063] Other structures and operations of the lightweight cargo box for a mining dump truck, the quantitative adjustment method of the supporting rubber pad, and the manufacturing method of the lightweight cargo box for a mining dump truck according to the embodiments of the present invention are known to ordinary technicians in the field and will not be described in detail here.

[0064] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0065] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A lightweight cargo box for a mining dump truck, characterized in that: include: Front baffle, left baffle, right baffle, bottom load frame and internal rubber pad; The front baffle is fixedly mounted on the top surface of the front side of the bottom supporting frame, and the left baffle and the right baffle are respectively fixedly mounted on the top surfaces of the left and right sides of the bottom supporting frame, and the front ends are fixedly connected to the front baffle; The bottom bearing frame as a whole adopts a hollow design, and is provided with a plurality of weight-reducing holes. The internal rubber pad is laid and fixed on the bottom bearing frame, and completely covers the weight-reducing holes.

2. The lightweight cargo box for a mining dump truck according to claim 1, characterized in that: The bottom supporting frame is manufactured by a segmented casting method, and the whole includes frame casting one, frame casting two, frame casting three, frame casting four, frame casting five, frame casting six, frame casting seven and frame casting eight. The frame castings are fixed by welding to form the bottom supporting frame.

3. The lightweight cargo box for a mining dump truck according to claim 2, characterized in that: The butt welds between the castings are arranged in non-high stress areas of the cargo box frame.

4. The lightweight cargo box for a mining dump truck according to claim 2, characterized in that: Each frame casting has a hollow interior design, and the tube wall thickness of each frame casting can be set separately according to the overall load-bearing layout of the cargo compartment, and the setting range of the tube wall thickness is 10-25mm.

5. The lightweight cargo box for a mining dump truck according to claim 2, characterized in that: The bottom supporting frame includes a front supporting structure, which is arranged at the front end of the bottom supporting frame, and the front baffle is welded and fixed to the top surface of the front side of the front supporting structure. The front supporting structure is composed of the front supporting structures of the frame casting one, the frame casting two, the frame casting three and the frame casting four.

6. The lightweight cargo box for a mining dump truck according to claim 5, characterized in that: The inner rubber pad is laid on the front supporting structure.

7. The lightweight cargo box for a mining dump truck according to claim 2, characterized in that: The bottom supporting frame includes a left side supporting structure and a right side supporting structure, and the left side supporting structure and the right side supporting structure are symmetrically arranged on the left and right sides of the bottom supporting frame, and the left baffle and the right baffle are respectively welded and fixed on the top surface of the left side supporting structure and the top surface of the right side supporting structure, and the left side supporting structure and the right side supporting structure are jointly composed of the side supporting structures of the frame casting one, the frame casting four, the frame casting five, the frame casting six, the frame casting seven and the frame casting eight.

8. The lightweight cargo box for a mining dump truck according to claim 7, characterized in that: The inner rubber pad is laid on both the left side supporting structure and the right side supporting structure.

9. The lightweight cargo box for a mining dump truck according to claim 1, characterized in that: The same number of mounting through holes are symmetrically arranged on the left and right sides of the bottom bearing frame, each of the mounting through holes is provided with a mounting cylinder seat, and each of the mounting cylinder seats is installed with an oil-gas spring; A plurality of steel wire ropes are inserted into the internal rubber pad, and both ends of each of the steel wire ropes extend out of the internal rubber pad and are respectively inserted into the corresponding mounting cylinder seat to be connected with the oil and gas spring in the mounting cylinder seat.

10. The lightweight cargo box for a mining dump truck according to claim 1, characterized in that: It also includes two groups of supporting rubber pads which are installed on the bottom longitudinal beam of the bottom load-bearing frame and distributed on the frame longitudinal beams on both sides.

11. The lightweight cargo box for a mining dump truck according to claim 10, characterized in that: Each group of the supporting rubber pads includes a plurality of rubber pad blocks, and the adjacent rubber pad blocks are spaced apart from each other. The thickness of each rubber pad block can be quantitatively adjusted to balance the loads of the supporting rubber pads on the left and right sides.

12. The lightweight cargo box for a mining dump truck according to claim 10, characterized in that: The rubber pad comprises a pad body and an adjusting pad. The overall thickness of the rubber pad can be adjusted by replacing the adjusting pads with different thicknesses.

13. A quantitative adjustment method for a supporting rubber pad, characterized in that: The supporting rubber pad used in any one of claims 10 to 12 comprises: Conduct 3D modeling of the assembly structure of the cargo box, supporting rubber pads and frame longitudinal beams, conduct finite element analysis on the assembly structure, and obtain finite element analysis results; The computer learns the finite element analysis results based on the machine deep learning method to explore the relationship between the load between the cargo box and the frame longitudinal beam and the distance between the cargo box and the frame longitudinal beam, and finally obtains the relationship X1 between the load between the cargo box and the frame longitudinal beam and the deformation of the cargo box and the frame longitudinal beam under load; The computer learns the finite element analysis results based on the machine deep learning method and combines the rubber nonlinear stiffness curve to obtain the relationship between the load between the cargo box and the frame longitudinal beam and the compression amount of the rubber pad X2; A high-resolution camera is used to take pictures of the coordination of the cargo box, supporting rubber pads and frame longitudinal beams under full load conditions, and the pictures are imported into a computer. The computer recognizes and analyzes the pictures based on visual recognition technology to obtain the compression deformation of each rubber pad and the deformation of the cargo box and frame longitudinal beam at each rubber pad, and calculates the distance D between the cargo box and the frame longitudinal beam at each rubber pad under full load conditions based on the deformation data; Under the premise that the loads between the cargo compartment and the frame longitudinal beam on each rubber pad are approximately equal and the error is controlled within ±10%, the computer can calculate the thickness of each rubber pad to be increased or decreased based on the relationship X1 between the loads between the cargo compartment and the frame longitudinal beam and the deformation of the cargo compartment and the frame longitudinal beam under load, the relationship X2 between the loads between the cargo compartment and the frame longitudinal beam and the compression of the rubber pad, and the distance D between the cargo compartment and the frame longitudinal beam at each rubber pad under the fully loaded condition.

14. The quantitative adjustment method of the supporting rubber pad according to claim 13, characterized in that: The contents of finite element analysis of assembly structure include: Different loads between the cargo compartment and the frame longitudinal beam are applied to each rubber pad, and multiple groups of load size schemes with different combinations are set to perform multiple finite element analyses to obtain the final finite element analysis results.

15. A method for manufacturing a lightweight cargo box for a mining dump truck, characterized in that: The lightweight cargo box for a mining dump truck used in any one of claims 1 to 12 comprises: Conduct 3D modeling of the entire cargo compartment and perform finite element analysis on the model; The load-bearing layout, stress distribution and other data of the cargo compartment are obtained through finite element analysis; Optimize the tube wall thickness of each frame casting of the bottom load-bearing frame of the cargo compartment according to the load-bearing layout data; Optimize the weld layout between the frame castings of the bottom load-bearing frame based on stress distribution data; The cargo compartment components are manufactured according to the optimized model, and the components are assembled to manufacture the cargo compartment.

Images