Bulk material transportation box body with self-discharging function

Abstract

The invention discloses a bulk cargo transportation box body with a self-unloading function, the box body is of an open top type cubic structure, and the box body is provided with a turnover top cover, a top cover opening and closing mechanism and a side door unloading mechanism; the box body is of a frame structure and comprises a bottom frame, side walls, end walls and a plurality of supporting rod pieces which are crossed with one another. The bottom frame is of a bulk material self-flowing type bottom frame structure composed of a lower side beam, a ridge cross beam, a longitudinal ridge, a transverse ridge and a flow guide plate. The multiple groups of back cross beams are arranged between the two lower side beams in parallel, and the back cross beams are of structures inclining towards the two sides; the longitudinal ridge is longitudinally arranged on the ridge cross beam along the box body, is matched with the inclination angle of the ridge cross beam and is fixed by welding; a plurality of groups of transverse ridges are fixedly arranged on inclined surfaces on two sides of the longitudinal ridge at intervals; inclined guide plates are arranged at four corners of the underframe; discharging openings formed in the side walls are formed between the adjacent transverse ridges and between the transverse ridges and the flow guide plates. According to the bulk cargo transportation box, external complex loading and unloading equipment is not needed, and rapid loading and self-unloading can be achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of transportation equipment design, especially the technical field of transportation box design, and specifically relates to a bulk material transportation box with a self-unloading function. Background Art

[0002] At present, bulk material transportation boxes are widely used in industries such as coal, ore, grain, and flake meal. As an efficient and convenient transportation organization method, multimodal transport has also been increasingly widely used in bulk material transportation. However, compared with loading and unloading in one piece, bulk material transportation boxes need to be loaded and unloaded by special loading and unloading equipment, with relatively low loading and unloading efficiency, limited transportation efficiency, and high transportation costs. Therefore, it is necessary to research and design a bulk material transportation box with a self-unloading function to achieve rapid loading and self-unloading without external complex loading and unloading equipment, and improve the efficiency and competitiveness of bulk material transportation. Summary of the Invention

[0003] The present invention discloses a bulk material transportation box with a self-unloading function. The purpose of the present invention is to provide a bulk material transportation box that can achieve rapid loading and self-unloading without external complex loading and unloading equipment, and improve the efficiency and competitiveness of bulk material transportation.

[0004] The present invention is achieved through the following technical solutions:

[0005] A bulk material transportation box with a self-unloading function, the box body is an open-top cubic structure, and the box body is provided with a flip-top cover, a cover opening and closing mechanism, and a side door unloading mechanism; characterized in that: the box body is a frame structure, composed of a chassis, side walls symmetrically arranged on the chassis, end walls arranged at both ends of the chassis and side walls, and multiple support rods arranged in a cross shape between the upper part of the box body frame, both side walls and both end walls;

[0006] The chassis consists of lower side beams, ridge cross beams, longitudinal ridges, transverse ridges, and a flow guide plate to form a self-flowing chassis structure for bulk materials; multiple groups of ridge cross beams are arranged in parallel between two lower side beams, and the ridge cross beams adopt a structure inclined to both sides, with an inclined repose angle of 25° to 35°; the longitudinal ridge is arranged longitudinally on the ridge cross beam along the box body and matches the inclination angle of the ridge cross beam, and is fixed by welding; multiple groups of transverse ridges are fixedly arranged at intervals on the inclined surfaces on both sides of the longitudinal ridge, with an inclined repose angle of 25° to 35°; inclined flow guide plates are arranged at the four corners of the chassis; the unloading ports are arranged on the side walls between adjacent transverse ridges and between the transverse ridges and the flow guide plates.

[0007] Furthermore, reinforcing ribs for reinforcement support are arranged below the longitudinal ridge, transverse ridge, and flow guide plate of the chassis.

[0008] Furthermore, the side wall is composed of an upper side beam, a side plate, side columns, and side cross beams to form a plate-beam type carriage side wall; a discharge opening matching the underframe is arranged at the lower part of the side wall and a discharging mechanism is provided; each side column of the side wall is hingedly provided with a turning arm for opening and closing the flip-top cover.

[0009] Furthermore, at least three side columns are arranged at intervals, and the upper ends are fixedly welded to the upper side beam; a reinforcing column is vertically fixedly arranged between adjacent side columns, and at least two horizontally arranged side cross beams are fixedly arranged; reinforcing blocks are welded at the four corners of the connection between the side cross beam and the side column; the side plate is arranged below the upper side beam and is integrally connected with the side column, the reinforcing column, and the side cross beam to form the inner surface of the box-shaped side wall, and a plurality of discharge openings are evenly arranged at intervals at the bottom of the side plate; a side door discharging mechanism is arranged at each discharge opening; a rain shield for the side wall with a bending structure is arranged above the upper side beam, and the rain shield for the side wall and the flip-top cover form a labyrinth type rainproof sealing structure.

[0010] Furthermore, the end wall is composed of corner columns, lower end beams, upper end beams, end cross beams, vertical beams, and end plates to form a plate-beam type carriage end wall; the top cover opening and closing mechanism is arranged on both sides below the end wall.

[0011] Furthermore, there are two end cross beams, which are horizontally arranged at intervals between the lower end beam and the upper end beam, and are fixedly connected to the corner columns at both ends; the vertical beam is arranged in the vertical middle of the end wall and is fixedly connected to each end cross beam, the upper end beam, and the lower end beam; the end plate is provided with holes for the connecting pipes of the top cover opening and closing mechanism to pass through; a reinforcing plate is arranged on the end plate for fixing the guide shaft of the top cover opening and closing mechanism; a rain shield for the end wall is arranged above the upper end beam and forms a labyrinth type rainproof sealing structure with the flip-top cover.

[0012] Furthermore, the middle part of the rain shield for the end wall is higher than both sides, and a structure with a higher middle and lower sides is formed after the flip-top cover is closed.

[0013] On each of the two side walls of the present invention, two sets of side door discharging mechanisms are respectively arranged, and each set of side door discharging mechanisms is composed of at least two unloading doors and a set of driving devices; the unloading door is a gate plate type structure that slides up and down for opening and closing, and the driving device is a manual worm and worm gear driving structure, and the worm is manually driven to drive the gate plate type unloading door to slide up and down for opening and closing.

[0014] The flip-top cover of the present invention is an opening and closing structure along the longitudinal axis of the box body. The left and right top covers are hinged to the side wall through turning arms and are located on the side wall after being turned and opened; when the left and right top covers are closed, a rainproof sealing rubber with a labyrinth structure that cooperates with each other is arranged at the joint of the bottom surfaces of the left and right top covers on the central axis of the box body, and the right cover is tightly pressed by the left cover by gravity to achieve sealing. Labyrinth structure grooves are arranged on the other three peripheries of the bottom surfaces of the left and right top covers and are embedded with rainproof sealing rubber to be combined with the top of the box body to achieve sealing.

[0015] Furthermore, the top cover opening and closing mechanism includes left and right top cover driving devices with the same structure and symmetrically arranged. The two ends of the top cover rotating shafts of the left and right top covers are located on the side walls of the two ends of the box body and are respectively drivingly hinged to the left and right top cover driving devices; the top cover driving device is composed of an active end top cover opening and closing system, a driven end top cover opening and closing system, and a transmission device;

[0016] The active end top cover opening and closing system includes a worm and worm gear driving device and a driving lever fixedly arranged on the lower side of the end wall of the box body; the worm and worm gear driving device includes: a driving worm, a worm wheel drivingly engaged with the driving worm, and a driving gear drivingly and hingedly arranged on the end wall of the box body by the worm wheel; the driving lever includes a connecting rod and a sector gear. One end of the connecting rod is drivingly hinged to the top cover rotating shaft, and the other end is fixedly connected to the sector vertex of the sector gear and hingedly arranged on the end wall of the box body; teeth drivingly engaged with the driving gear are arranged on the sector edge of the sector gear;

[0017] The driven end top cover opening and closing system includes a driving lever with the same structure as the active end top cover opening and closing system; the transmission device is arranged at the bottom of the box body and includes a transmission shaft arranged longitudinally along the box body; the transmission shaft is connected to the driving gear at the active end top cover opening and closing system end, and a driven gear drivingly engaged with the sector gear is fixedly arranged at the driven end top cover opening and closing system end.

[0018] The combination relationship and collaborative working mode of each structure of the bulk material transportation box body of the present invention:

[0019] The box body frame structure serves as the basic support of the entire box body and provides a stable installation platform for other structures; the flip-top cover and its sealing structure are connected to the connecting rod of the labor-saving gear transmission type top cover opening and closing mechanism through the flip shaft, and the side is connected to the flip arm on the side wall of the box body frame structure. The connecting rod of the labor-saving gear transmission type top cover opening and closing mechanism drives the flip-top cover and its sealing structure to open and close, and the side wall flip arm assists the flip-top cover and its sealing structure to rotate and maintain the open and closed states. When the flip-top cover and its sealing structure are in the closed state, they form a pressing mechanism and a labyrinth sealing and rainproof structure with the end wall rain shield and the side wall rain shield, providing double sealing and rainproof protection. The support members of the box body frame structure support the flip-top cover and its sealing structure in the closed state to prevent it from sagging; the mounting seat of the labor-saving gear transmission type top cover opening and closing mechanism is installed at the reserved installation position on the end wall of the box body frame structure. The connecting pipe and the transmission shaft pass through the holes reserved in the box body frame structure. The labor-saving gear transmission type top cover opening and closing mechanism is manually operated. By driving the input shaft of the worm and worm gear reducer with a pointed tail ratchet wrench, it drives the flip-top cover and its sealing structure to open and close, and has a self-locking function to ensure the locking reliability of the flip-top cover and its sealing structure; the side door unloading opening and closing mechanism capable of controlling the unloading speed is installed on the side wall of the box body frame structure. After opening the unloading door on the side wall, by rotating the manual worm and worm gear drive, the gate plate can be lifted and fixed at any position within the height range of the unloading port, thereby controlling the size of the unloading port and achieving the purpose of controlling the unloading speed.

[0020] The bulk material transportation box body of the present invention is provided with a flip-top cover for the box body, which can quickly open the top cover, realize the rapid loading of bulk goods, and has double sealing against rain, with reliable sealing.

[0021] The side door unloading opening and closing mechanism that can control the unloading speed is set on the bulk material transportation box body of the present invention, which can automatically unload the bulk material without manual or additional loading and unloading equipment, and can accurately control the unloading speed according to actual needs.

[0022] The labor-saving gear-driven top cover opening and closing mechanism is set on the bulk material transportation box body of the present invention, which reduces the operating force when opening and closing the top cover, and reduces the labor cost and labor intensity.

[0023] The bottom frame ridge cross beam of the box body frame structure of the bulk material transportation box body of the present invention adopts a convex structure, and the angle of repose ranges from 25° to 35°. The longitudinal ridge and the transverse ridge adopt bending parts, and the angle of repose ranges from 25° to 35°, which can avoid the accumulation of bulk goods and effectively ensure the smoothness of the goods.

[0024] The side wall of the box body frame structure of the bulk material transportation box body of the present invention is provided with side columns, side cross beams, and reinforcing blocks, which improve the strength of the side wall; it is provided with a flip arm to assist the rotation and maintain the open and closed state of the flip-top cover and its sealing structure; a rain shield is set on the side wall, which forms a labyrinth structure with the flip-top cover and its sealing structure to ensure the rainproof and sealing performance.

[0025] The end wall of the box body frame structure of the bulk material transportation box body of the present invention is provided with end cross beams and vertical beams, which improve the strength of the end plate and prevent the end plate from deforming during emergency braking in the process of bulk material transportation; the rain shield edge of the end wall adopts a structure of two bends and an inclined edge, which forms a labyrinth structure with the end beam of the flip-top cover and its sealing structure to ensure the rainproof and sealing performance.

[0026] The flip-top cover and its sealing structure for the box body equipped on the bulk material transportation box body of the present invention can quickly open the top cover, which provides convenience for quickly loading bulk materials into the box body and is more efficient than the traditional top cover opening method; the self-unloading function of the bulk material transportation box body of the present invention can automatically unload the bulk material without manual or additional loading and unloading equipment, greatly shortening the unloading time and improving the overall transportation turnover efficiency; the labor-saving gear-driven top cover opening and closing mechanism of the bulk material transportation box body of the present invention reduces the operating force when opening and closing the top cover, enables the operator to operate more easily, and reduces the labor cost and labor intensity; the door opening and closing mechanism that can control the unloading speed of the bulk material transportation box body of the present invention can accurately control the unloading speed according to actual needs, which is convenient for unloading in different sites and working conditions, and improves the flexibility and convenience of operation; the bulk material transportation box body of the present invention has double sealing against rain through the design of sealing rubber strips, extrusion mechanisms, and labyrinth structures.

[0027] The overall structure of the bulk material transportation box of the present invention is reasonably designed, can better withstand various external forces during transportation, ensure the stability and safety of the transportation process, and reduce the risks of cargo damage and transportation accidents; it can adapt to the transportation needs of different types of bulk materials, and has stronger versatility compared to traditional boxes with single functions, providing more usage value for users; functions such as controlling the unloading speed enable it to meet the requirements of different unloading sites, and can successfully complete the unloading operation whether in narrow spaces or places with strict requirements for unloading speed. Brief Description of the Drawings

[0028] Figure 1 It is a front view schematic diagram of the overall structure of the box of the present invention.

[0029] Figure 2 It is a side view schematic diagram of the overall structure of the box of the present invention.

[0030] Figure 3 It is a schematic diagram when the box of the present invention is loaded.

[0031] Figure 4 It is a schematic diagram when the box of the present invention is unloading.

[0032] Figure 5 It is a schematic diagram of the box frame structure of the box of the present invention.

[0033] Figure 6 It is a schematic diagram of the chassis structure of the box frame structure of the box of the present invention.

[0034] Figure 7 It is a schematic diagram of the side wall structure of the box frame structure of the box of the present invention.

[0035] Figure 8 It is a schematic diagram of the end wall structure of the box frame structure of the box of the present invention. Detailed Description of the Embodiment

[0036] The present invention will be further described below in conjunction with the detailed embodiments. The detailed embodiments are further explanations of the principles of the present invention and do not limit the present invention in any way. The same or similar technologies to the present invention do not exceed the scope of protection of the present invention.

[0037] In conjunction with the drawings.

[0038] As shown in the figure, a bulk material transportation box with a self-unloading function in this embodiment includes: a flip-top cover 1, a cover opening and closing mechanism 2, a side door unloading mechanism 3, and a box 4. Among them, for specific illustration, a container box as shown in the figure is used in this embodiment for illustration.

[0039] The box body 4 is of a frame structure and is composed of a chassis 4-1, side walls 4-2 symmetrically arranged on the chassis, end walls 4-3 arranged at both ends of the chassis 4-1 and the side walls 4-2, and support members 4-4 arranged between the two side walls 4-2 and the two end walls 4-3.

[0040] The chassis 4-1 is composed of a lower side beam 4-11, a backbone cross beam 4-12, a longitudinal backbone 4-13, a transverse backbone 4-14, a deflector 4-15, and a reinforcing rib 4-16. The backbone cross beam 4-12 is arranged between the two lower side beams 4-11. To ensure the smooth flow of bulk goods, the backbone cross beam 4-12 adopts a convex structure, and the angle of repose ranges from 25° to 35°. The longitudinal backbone 4-13 is arranged above the backbone cross beam 4-12. To ensure the smooth flow of bulk goods, the longitudinal backbone 4-13 adopts a bent part, and the angle of repose ranges from 25° to 35°. The transverse backbone 4-14 is arranged above the longitudinal backbone 4-13. To ensure the smooth flow of bulk goods, the transverse backbone 4-14 adopts a bent part, and the angle of repose ranges from 25° to 35°. To avoid the accumulation of bulk goods, the transverse backbone 4-14 is arranged between adjacent unloading ports. To avoid the accumulation of bulk goods, deflectors 4-15 are arranged at the four corners of the chassis. To ensure the bearing capacity of the transverse backbone 4-14 and the deflectors 4-15, reinforcing ribs 4-16 are arranged between the longitudinal backbone 4-13 and the transverse backbone 4-14 and the deflectors 4-15.

[0041] The side wall 4-2 is mainly composed of an upper side beam 4-21, a side plate 4-22, side columns 4-23, side cross beams 4-24, a turning arm 4-25, a reinforcing block 4-26, a lower side door 4-27, and a side wall rain shield 4-28. The side plate 4-22 is arranged below the upper side beam 4-21. Four unloading ports are evenly arranged at the bottom of the side plate 4-22, and slots are arranged at both ends of the bottom for the worm of the side door unloading mechanism 3 for controlling the unloading speed to pass through. To ensure the strength of the side wall 4-2, side columns 4-23 are also arranged on the side plate 4-22 and the upper side beam 4-21; on the side plate 4-22, side cross beams 4-24 are arranged between the side columns 4-23; reinforcing blocks 4-26 are arranged in contact with the side cross beams 4-24 and the side columns 4-23. One end of the turning arm 4-25 is fixed on the side column 4-23, and the other end is fixed on the flip-top cover 1 and its sealing structure. The lower side door 4-27 is arranged at the unloading port and fixed on the side cross beam 4-24. The side wall rain shield 4-28 adopts a double-bent structure and is arranged above the upper side beam 4-21 to form a labyrinth structure with the side longitudinal beam of the flip-top cover 1.

[0042] The end wall 4-3 is mainly composed of corner posts 4-31, lower end beams 4-32, upper end beams 4-33, end cross beams 4-34, vertical beams 4-35, end plates 4-36, reinforcing plates 4-37, and end wall rain shields 4-38. The end cross beam 4-34 is arranged in the middle of the end wall 4-3 and is connected to the corner posts 4-31 at both ends. Vertical beams 4-35 are arranged between the end cross beam 4-34 and the upper and lower end beams, and between the end cross beams 4-34 to strengthen the strength of the end plate 4-36 and prevent the end plate 4-36 from deforming during emergency braking in the process of bulk material transportation. The end plate 4-36 is provided with holes for the connecting pipes of the labor-saving gear-driven top cover opening and closing mechanism 2 to pass through. The reinforcing plate 4-37 is arranged on the end plate 4-36 to fix the guide shaft of the labor-saving gear-driven top cover opening and closing mechanism 2. The end wall rain shield edge 4-38 adopts a structure of double bending and beveling, is arranged above the upper end beam 4-33, and forms a labyrinth structure with the end beam of the flip-top cover 1, so that after the flip-top cover is closed, a structure with a higher middle and lower sides is formed.

[0043] Two sets of side door unloading mechanisms 3 are respectively arranged on both side walls. Each set of side door unloading mechanisms 3 is composed of at least two unloading doors and a set of driving devices; the unloading doors are gate-type up-and-down sliding opening and closing structures, and the driving devices are manual worm and worm gear driving structures, and the worm is manually driven to drive the gate-type unloading door to slide up and down to open and close.

[0044] The flip-top cover 1 is an opening and closing structure along the longitudinal axis of the box body. The left and right top covers are hinged to the side wall through the flip arms 4-25 and are located at the side wall after flipping and opening; when the left and right top covers are closed, a rainproof sealing glue with a mutually matching labyrinth structure is arranged at the joint of the bottom surfaces of the left and right top covers on the central axis of the box body, and the right cover is pressed by the left cover by gravity to achieve sealing. Labyrinth-structured grooves are arranged on the other three perimeters of the bottom surfaces of the left and right top covers and are embedded with rainproof sealing glue to be combined with the top of the box body to achieve sealing.

[0045] The top cover opening and closing mechanism 2 includes left and right top cover driving devices with the same structure and symmetrically arranged. The two ends of the top cover rotating shafts of the left and right top covers are located on the side of the two end walls of the box body and are respectively drivingly hinged to the left and right top cover driving devices; the top cover driving device is composed of an active end top cover opening and closing system, a driven end top cover opening and closing system, and a transmission device;

[0046] The active end top cover opening and closing system includes a worm and worm gear driving device and a driving lever fixedly arranged on the lower side of the box body end wall; the worm and worm gear driving device includes: a driving worm, a worm wheel drivingly matched with the driving worm, and a driving gear drivingly and hingedly arranged on the box body end wall by the worm wheel; the driving lever includes a connecting rod and a sector gear. One end of the connecting rod is drivingly hinged to the top cover rotating shaft, and the other end is fixedly connected to the sector vertex of the sector gear and is hinged to the box body end wall; teeth drivingly matched with the driving gear are arranged on the sector edge of the sector gear;

[0047] The driven-end top cover opening and closing system includes a driving lever with the same system structure as that of the driving-end top cover opening and closing system; the transmission device is arranged at the bottom of the box body and includes a transmission shaft arranged longitudinally along the box body; the transmission shaft is connected to a driving gear at the driving-end top cover opening and closing system end and is fixedly provided with a driven gear that cooperates with a sector gear at the driven-end top cover opening and closing system end.

[0048] The door opening and closing mechanism capable of controlling the unloading speed of the bulk material transportation box body with a self-unloading function of the present invention can be one group, two groups, three groups or more groups of box bodies; the transmission type top cover opening and closing mechanism of the bulk material transportation box body with a self-unloading function is not limited to being driven by a ratchet wrench, and can also be an electric or pneumatic wrench; the transmission type top cover opening and closing mechanism of the bulk material transportation box body with a self-unloading function can be driven on both sides or on one side.

[0049] The above is only the preferred embodiment of the present invention and is not used to limit the present invention. The present invention can have various changes and modifications to be applicable to different types of bulk material transportation vehicles.

Claims

1. A bulk material transportation box with a self-unloading function. The box is an open-top cubic structure and is provided with a flip-top cover, a cover opening and closing mechanism, and a side door unloading mechanism. It is characterized in that: The box body is of a frame structure and is composed of a chassis, side walls symmetrically arranged on the chassis, end walls arranged at both ends of the chassis and the side walls, and multiple support bars that cross each other in a cross shape and are arranged above the box body frame, between the two side walls and the two end walls; The chassis is composed of lower side beams, ridge cross beams, longitudinal ridges, transverse ridges, and a deflector to form a bulk material self-flow type chassis structure; multiple groups of ridge cross beams are arranged in parallel between two lower side beams, and the ridge cross beams adopt a structure inclined to both sides, with an inclined repose angle of 25° to 35°; the longitudinal ridge is arranged longitudinally on the ridge cross beams along the box body and matches the inclination angle of the ridge cross beams, and is fixed by welding; multiple groups of transverse ridges are fixedly arranged at intervals on the inclined surfaces on both sides of the longitudinal ridge, with an inclined repose angle of 25° to 35°; deflectors are arranged obliquely at the four corners of the chassis; discharge openings are arranged on the side walls between adjacent transverse ridges and between the transverse ridges and the deflectors.

2. The bulk material transportation box with a self-unloading function according to claim 1, wherein: Reinforcing ribs for reinforcement support are arranged below the longitudinal ridge, transverse ridge, and deflector of the chassis.

3. The bulk material transportation box with a self-unloading function according to claim 2, wherein: The side wall is composed of an upper side beam, a side plate, side columns, and side cross beams to form a plate beam type car body side wall; a discharge opening matching the chassis is arranged at the lower part of the side wall and a discharge mechanism is arranged; flip arms for opening and closing a flip top cover are hingedly arranged on each side column of the side wall.

4. The bulk material transportation box with a self-unloading function according to claim 3, characterized in that: At least three side columns are arranged at intervals, and the upper ends are fixedly welded to the upper side beam; a reinforcing column is vertically fixedly arranged between adjacent side columns, and at least two horizontally arranged side cross beams are fixedly arranged; reinforcing blocks are welded at the four corners of the connection between the side cross beam and the side column; the side plate is arranged below the upper side beam and is connected integrally with the side column, reinforcing column, and side cross beam to form the inner surface of the box body side wall, and multiple discharge openings are evenly arranged at intervals at the bottom of the side plate; a side door discharge mechanism is arranged at each discharge opening; a rain shield for the side wall with a bending structure is arranged above the upper side beam, and the rain shield for the side wall and the flip top cover form a labyrinth type rainproof sealing structure.

5. The bulk material transportation box with a self-unloading function according to claim 3, characterized in that: The end wall is composed of corner columns, lower end beams, upper end beams, end cross beams, vertical beams, and end plates to form a plate beam type car body end wall; a top cover opening and closing mechanism is arranged on both sides below the end wall.

6. The bulk material transportation box body with a self-unloading function according to claim 5, characterized in that: Two end cross beams are arranged horizontally at intervals between the lower end beam and the upper end beam, and are connected and fixed to the corner columns at both ends; the vertical beam is arranged in the vertical middle of the end wall and is connected and fixed to each end cross beam, upper end beam, and lower end beam; the end plate is provided with holes for the connecting pipes of the top cover opening and closing mechanism to pass through; a reinforcing plate is arranged on the end plate for fixing the guide shaft of the top cover opening and closing mechanism; a rain shield for the end wall is arranged above the upper end beam and forms a labyrinth type rainproof sealing structure with the flip top cover.

7. The bulk material transportation box with a self-unloading function according to claim 6, characterized in that: The middle of the rain shield for the end wall is higher than both sides, and a structure with a higher middle and lower sides is formed after the flip top cover is closed.

8. The bulk material transportation box with a self-unloading function according to any one of claims 1 to 7, characterized in that: Two sets of side door discharge mechanisms are respectively arranged on both side walls, and each set of side door discharge mechanisms is composed of at least two unloading doors and a set of driving devices; the unloading door is of a gate plate type structure that slides up and down to open and close, and the driving device is a manual worm and gear driving structure, and the worm is manually driven to drive the gate plate type unloading door to slide up and down to open and close.

9. The bulk material transportation box with a self-unloading function according to any one of claims 1 to 7, characterized in that: The flip-top cover is an opening and closing structure along the longitudinal axis of the box body. The left and right covers are hinged to the side walls through flip arms and are located on the side walls after being flipped open. When the left and right covers are closed, a rainproof sealing rubber with a labyrinth structure that cooperates with each other is arranged at the joint of the bottom surfaces of the left and right covers on the central axis of the box body. The right cover is sealed by the left cover pressing it tightly by gravity. Grooves with a labyrinth structure are arranged on the other three peripheries of the bottom surfaces of the left and right covers, and rainproof sealing rubber is embedded to be combined with the top of the box body to achieve sealing.

10. The bulk material transportation box body with a self-unloading function according to any one of claims 9, characterized in that: The cover opening and closing mechanism includes left and right cover driving devices with the same structure and symmetrically arranged. The two ends of the cover rotating shafts of the left and right covers are located on the sides of the two end walls of the box body and are respectively hinged to the driving of the left and right cover driving devices. The cover driving device is composed of an active-end cover opening and closing system, a driven-end cover opening and closing system, and a transmission device. The active-end cover opening and closing system includes a worm and gear driving device and a driving lever fixedly arranged under the end wall of the box body. The worm and gear driving device includes a driving worm, a worm wheel that is driven in cooperation with the driving worm, and a driving gear that is driven by the worm wheel and is hinged to the end wall of the box body. The driving lever includes a connecting rod and a sector gear. One end of the connecting rod is hinged to the driving of the cover rotating shaft, and the other end is fixedly connected to the sector vertex of the sector gear and is hinged to the end wall of the box body. A driving mating tooth that cooperates with the driving gear is arranged on the sector edge of the sector gear. The driven-end cover opening and closing system includes a driving lever with the same structure as the active-end cover opening and closing system. The transmission device is arranged at the bottom of the box body and includes a transmission shaft arranged longitudinally along the box body. The transmission shaft is connected to the driving gear at the active-end cover opening and closing system end and is fixedly provided with a driven gear that is driven in cooperation with the sector gear at the driven-end cover opening and closing system end.

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