Submerged-deck cargo box

Abstract

A submerged-deck cargo box, comprising a cargo box body (1), a cargo box beam connected to the bottom of the cargo box body (1), a tensioning limiting structure (5) mounted on the cargo box beam, and a vehicle frame (2). The cargo box beam is of an M-shaped structure formed by a transverse member (3) and longitudinal beams (4), said transverse member (3) and longitudinal beams (4) being hingedly connected to the vehicle frame (2), the two longitudinal beams (4) each coat the outer side frame of the vehicle frame (2), the tensioning limiting structure (5) is mounted on the transverse member (3) hingedly connected to the vehicle frame (2), and two ends of the tensioning limiting structure (5) are limited on the inner side frame of the vehicle frame (2). The present container solves the problems of torsional deformation and cracking in uneven road conditions.

Description

A sinking cargo box Technical Field

[0001] The utility model relates to the technical field of engineering machinery, in particular to a sinking type cargo box. Background Art

[0002] The existing off-road dump truck cargo box bottom beam and frame are a separate structure, which is only connected by a rotating shaft and does not participate in the frame structure support. When the uneven road conditions in mining areas cannot be guaranteed, the cargo box is prone to pendulum motion under heavy load, causing torsional deformation of the cargo box and frame. In severe cases, cracks may occur, greatly affecting the stability and safety of the vehicle body. The cargo box is relatively stable when it undergoes extension and tension motion under current working conditions due to its stable beam structure at the bottom, but it has not fully utilized the auxiliary support of the frame.

[0003] Utility Model Content

[0004] The purpose of the present utility model is to provide a sinking cargo box to solve the problem proposed in the above background technology that the cargo box bottom beam does not participate in the support of the frame structure, and the frame is prone to torsional deformation or cracking when the road conditions cannot be guaranteed, affecting the stability and safety of the vehicle body.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a sinking cargo box, comprising: a cargo box body, a cargo box beam connected to the bottom of the cargo box body, a tensioning and limiting structure installed on the cargo box beam, and a vehicle frame;

[0006] Among them, the cargo box beam is composed of a crossbeam and a longitudinal beam hinged on the frame to form an M-shaped structure, and the two groups of crossbeams are respectively wrapped on the outer side frame of the frame. The tensioning limit structure is installed on the crossbeam away from the hinged frame and the tensioning ends are limited on the inner side frame of the frame.

[0007] Preferably, the tensioning limit structure is provided with two groups of tensioning beams and connecting plates that provide the two groups of tensioning beams with linear sliding motion. The two groups of tensioning beams are fixed on the crossbeams through the connecting plates. Mounting positions for installing springs are reserved on the opposite surfaces of the two groups of tensioning beams. The elastic potential energy of the springs drives the two groups of tensioning beams to apply tensioning force outward.

[0008] Preferably, any one of the tensioning beams is provided with a side cover connected to the tensioning beam by bolts, a telescopic top rod is installed in the tensioning beam, and the extending rod of the telescopic top rod passes through the side cover and the spring and is connected to the other tensioning beam by bolts.

[0009] Preferably, the frame is provided with a limiting protrusion at the tensioning beam, the protrusions are symmetrically arranged, and the tensioning beam is provided with a corresponding recess at the protrusion.

[0010] Preferably, the tensioning beam is provided with rounded corners below the recess.

[0011] Preferably, both groups of tension beams are provided with rounded corners.

[0012] Preferably, the top of the protrusion is rounded.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] The utility model comprises an M-shaped structure consisting of a crossbeam and a longitudinal beam, which is wrapped around the frame to provide auxiliary support for the cargo box body when carrying heavy objects. At the same time, the hinge cooperates with the tensioning and limiting structure to form a whole with the front and rear cargo box beams when the cargo box produces a pendulum motion under heavy load. This solves the problems in the prior art of torsional deformation and cracking of the cargo box bottom beam when transporting on uneven road conditions in mining areas, which can cause instability and a lack of vehicle body safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 is a schematic diagram of the structure of the vehicle frame and cargo box beam of the utility model from a bottom view;

[0017] Figure 3 is a schematic cross-sectional view of the tensioning and limiting structure of the present invention;

[0018] Figure 4 is a schematic diagram of the explosive disassembly of the tensioning and limiting structure of the present invention;

[0019] FIG5 is an enlarged structural diagram of point A in FIG2 .

[0020] In the figure: 1. Cargo box body; 2. Frame; 3. Crossbeam; 4. Longitudinal beam; 5. Tensioning limit structure; 6. Tensioning beam; 7. Connecting plate; 8. Spring; 9. Side cover; 10. Telescopic top rod; 11. Bump; 12. Depression; 13. Rounded corner. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] Please refer to Figures 1 to 5. A sinking cargo box, as shown in Figure 1, consists of a cargo box body 1, a cargo box beam connected to the bottom of the cargo box body 1, a tensioning and limiting structure 5 installed on the cargo box beam, and a frame 2.

[0023] In the specific implementation, as shown in Figures 1 and 2, the cargo box beam is composed of a crossbeam 3 and a longitudinal beam 4 hinged on the frame 2 to form an M-shaped structure. The two sets of crossbeams 4 are respectively wrapped around the outer side frames of the frame 2, and the tensioning limit structure 5 is installed on the crossbeam 3 away from the articulated frame 2 and the tensioning ends are limited on the inner side frames of the frame 2.

[0024] As shown in Figures 3 and 4, the tensioning and limiting structure 5 is provided with two groups of tensioning beams 6 and connecting plates 7 that provide the two groups of tensioning beams 6 with linear sliding motion. The two groups of tensioning beams 6 are fixed to the crossbeam 3 through the connecting plates 7. The connecting plates 7 and the crossbeam 3 are fixed with bolts or welding, but are not limited to the above-mentioned fixing methods. Those skilled in the art can make appropriate choices according to actual needs.

[0025] Mounting positions for springs 8 are reserved on the opposing surfaces of the two sets of tension beams 6. The elastic potential energy of the springs 8 drives the two sets of tension beams 6 to apply tensioning force outward. In this embodiment, two sets of springs 8 are symmetrically arranged between the two sets of tension beams 6. A side cover 9 connected to the tension beam 6 by bolts is provided on any tension beam 6 to facilitate the installation of a telescopic push rod 10 and also to limit the position of the telescopic push rod 10 and install the spring 8. The telescopic push rod 10 is installed in the tension beam 6. The extension rod of the telescopic push rod 10 passes through the side cover 9 and the spring 8 and is connected to the other tension beam 6 by bolts. The extension of the telescopic push rod 10 tightens and locks the two sets of tension beams 6, and also prevents jamming when the dump truck cargo box is reset.

[0026] As shown in Figure 5, the frame 2 is equipped with symmetrically positioned stoppers 11 on the tension beams 6, each with a rounded top. These stoppers 11 are matched with recesses 12 on the tension beams 6 to increase vertical stopper stress during tensioning. Both sets of tension beams 6 have rounded corners 13 below the recesses 12 to facilitate repositioning of the dump truck's cargo box.

[0027] It should be noted that in actual use, the sinking cargo box consists of a crossbeam 3 and a longitudinal beam 4 hinged to the frame 2, forming an M-shaped structure. This structure wraps around the frame 2 and supports the cargo box body 1 to carry heavy objects, providing auxiliary support for the shelf. At the same time, the tensioning limit structure 5 on the crossbeam 3 is tensioned at the hinged end, causing the cargo box to produce a pendulum motion under heavy loads, leading to torsional deformation and cracking. Furthermore, the frame 2 is equipped with a protrusion 11 on the tensioning beam 6 of the tensioning limit structure 5. When tensioning, the protrusion 11 is located in the depression 12 of the tensioning beam 6, increasing stress.

[0028] When the cargo box body 1 needs to be unloaded, the telescopic top rod 10 is relaxed, and the cargo box body 1 is driven to flip around the hinge of the cross beam 3 and the frame 2 for unloading through the external hydraulic system. Since the top of the protrusion 11 is rounded, under the influence of external force, the spring 8 between the two sets of tensioning plates 6 is compressed, and the tensioning beam 6 slides on the connecting plate 7, so that the depression 12 on the tensioning beam 6 is separated from the protrusion 11. Since the spring 8 is in a compressed state when the depression 12 is located at the protrusion 11, the elastic potential energy of the spring 8 is released after the tensioning beam 6 completely leaves the frame 2, causing the tensioning beam 6 to slide outward.

[0029] When the cargo box body 1 is reset, the rounded corner 13 at the bottom of the tensioning beam 6 first contacts the frame 2, and under the influence of the structure of the rounded corner 13, the spring 8 is compressed until the recess 12 of the tensioning beam 6 is located on the protrusion 11, and the loose telescopic top rod 10 is extended until it reaches the preset pressure threshold and stops extending. The specific value of the pressure threshold needs to be set and selected by technical personnel in this field according to the material and the size of the dump truck, and will not be described in detail here.

[0030] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A sinking cargo box, characterized in that: include: A cargo box body (1), a cargo box beam connected to the bottom of the cargo box body (1), a tensioning and limiting structure (5) installed on the cargo box beam, and a vehicle frame (2); The cargo box beam is formed into an M-shaped structure by a crossbeam (3) and a longitudinal beam (4) hinged on the vehicle frame (2); two groups of the crossbeams (4) are respectively wrapped on the outer side frames of the vehicle frame (2); the tensioning and limiting structure (5) is installed on the crossbeam (3) away from the hinged vehicle frame (2), and the tensioning ends are limited on the inner side frames of the vehicle frame (2).

2. The sinking type cargo box according to claim 1, characterized in that: The tensioning limiting structure (5) is provided with two groups of tensioning beams (6) and a connecting plate (7) for providing the two groups of tensioning beams (6) with linear sliding motion. The two groups of tensioning beams (6) are fixed to the crossbeam (3) through the connecting plate (7). Mounting positions for springs (8) are reserved on the opposite surfaces of the two groups of tensioning beams (6). The elastic potential energy of the springs (8) drives the two groups of tensioning beams (6) to apply tensioning force outward.

3. The sinking type cargo box according to claim 2, characterized in that: Any one of the tensioning beams (6) is provided with a side cover (9) connected to the tensioning beam (6) by bolts, a telescopic top rod (10) is installed in the tensioning beam (6), and the extension rod of the telescopic top rod (10) passes through the side cover (9) and the spring (8) and is connected to the other tensioning beam (6) by bolts.

4. The sinking type cargo box according to claim 2 or 3, characterized in that: The frame (2) is provided with a protrusion (11) for limiting position at the tensioning beam (6), and the protrusions (11) are symmetrically arranged. The tensioning beam (6) is provided with a corresponding recess (12) at the protrusion (11).

5. The sinking type cargo box according to claim 4, characterized in that: The tensioning beam (6) is provided with a rounded corner (13) below the recess (12).

6. The sinking type cargo box according to claim 5, characterized in that: Both groups of tension beams (6) are provided with rounded corners (13).

7. The sinking type cargo box according to claim 6, characterized in that: The top of the protrusion (11) is rounded.

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