Portable container automatic unloading device

Abstract

The invention provides a portable container automatic unloading device, and relates to the technical field of unloading, the portable container automatic unloading device comprises a vehicle body and a storage container, the storage container is fixedly mounted on the vehicle body, the vehicle body is provided with an unloading mechanism facilitating rapid unloading of the storage container, and the vehicle body is provided with a material control mechanism facilitating slurry unloading control; the discharging mechanism comprises a discharging shell, a material storage bag and an air pump, and the material control mechanism comprises a side plate, a rack and an L-shaped connecting rod. Through cooperation of the air pump, the discharging shell and the storage bag, air is injected into the discharging shell through the air pump, the discharging shell is extruded to inject slurry into a pile, continuous discharging is achieved, discharging is extruded through the storage bag, separation of the slurry can be effectively reduced, the slurry flows more stably in the process that the storage bag is slowly extruded by the air, and the discharging efficiency is improved. The separation of aggregate and cement paste is reduced, so that the overall quality of the paste is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of unloading, and more specifically, particularly relates to a convenient automatic unloading device for a cargo box. Background Art

[0002] In many industrial production processes, slurry is an important raw material or intermediate product. Timely and efficient slurry unloading can ensure the smooth progress of the production process and avoid production interruptions due to untimely material supply.

[0003] The Chinese patent publication number is: CN118579552A, an asphalt mixture uniform unloading device, the invention can soften the asphalt mixture attached to the unloading pipe and the inner wall of the scraper barrel through the cooperation of the unloading mechanism and the temperature control mechanism, avoid excessive accumulation of the asphalt mixture, and cooperate with the use of the scraper mechanism to make the heated asphalt mixture easier to be scraped off by the scraper barrel and the scraper plate, thereby improving the discharge effect.

[0004] Existing cargo boxes have the following disadvantages when unloading:

[0005] 1. The existing unloading method relies solely on gravity and lacks additional power assistance, which limits the flow rate of the slurry. When rapid unloading is required to meet the production schedule, gravity unloading often fails to empty the silo in time, causing the production process to stagnate and affecting the overall production efficiency.

[0006] 2. When the existing slurry is discharged, due to the lack of external force, the slurry is prone to blockage in the discharge port or pipeline due to its own viscosity, particle agglomeration, etc. during the flow process, affecting the progress of the discharge, and even requiring manual cleaning. In addition, the slurry usually contains particles of different sizes. Under the action of gravity, larger particles are more likely to settle downward due to their greater gravity, while smaller particles may lag behind, resulting in stratification of particles in the vertical direction, even if the slurry is segregated;

[0007] 3. When the existing slurry is unloaded, gravity unloading cannot accurately control the unloading speed and flow rate, which makes it difficult to adjust the slurry supply speed according to actual needs when connecting with subsequent production links, which can easily cause overload or idleness of downstream equipment, which is not conducive to the stability and optimization of the production process.

[0008] In view of this, the existing structure and defects are studied and improved, and a convenient automatic unloading device for cargo boxes is provided. Summary of the invention

[0009] In order to solve the above technical problems, the present invention provides a convenient automatic unloading device for a cargo box to solve the above problems.

[0010] A convenient cargo box automatic unloading device comprises a vehicle body and a storage cargo box, the storage cargo box is fixedly mounted on the vehicle body, a unloading mechanism is provided on the vehicle body for facilitating quick unloading of the storage cargo box, a material control mechanism is provided on the vehicle body for facilitating unloading and controlling of slurry, the unloading mechanism comprises a unloading shell, a storage bag and an air pump, the material control mechanism comprises a side plate, a rack and an L-shaped connecting rod, the unloading shell is fixedly mounted on the side end of the storage cargo box, two mounting rods are fixedly mounted on the side end of the storage bag, and the storage bag is fixedly mounted on the unloading shell through the two mounting rods The inner wall of the shell, the side plate is fixedly installed on the side end of the vehicle body, the rack is located at the lower end of the unloading shell, the rack is fixedly installed on the lower end of the L-shaped connecting rod, the air pump is fixedly installed on the side end of the storage box, the storage box is provided with a pump suction pipe, the lower end of the unloading shell is penetrated with an outlet groove, the upper end of the unloading shell is movably sleeved with a cover plate, the upper end of the cover plate is provided with two one-way air intake valves, the lower end of the unloading shell is fixedly installed with an L-shaped fixing plate, the upper end of the cover plate is penetrated with an inlet groove, the storage bag A one-way feed valve is provided at the upper end, the pump suction pipe passes through the inner wall of the L-shaped fixed plate, the end of the pump suction pipe is fixedly installed on the inner wall of the one-way feed valve, the lower end of the storage bag is fixedly installed with a discharge valve tube, the circumferential end of the discharge valve tube passes through a circular groove, the inner wall of the discharge valve tube is provided with a valve plate, the side end of the valve plate is fixedly installed with a rotating shaft, the circumferential end of the rotating shaft is fixedly installed with a gear, the rotating shaft passes through and is rotatably installed on the inner wall of the circular groove, the gear and the rack are meshed, and the side end of the side plate passes through a rectangular groove A limiting rod is slidably installed on the inner side wall of the rectangular groove, and a pull plate is fixedly installed on the side end of the limiting rod, two first springs are fixedly installed between the pull plate and the side plate, a second spring is fixedly installed between the rack and the L-shaped fixed plate, a telescopic rod is also fixedly installed between the rack and the L-shaped fixed plate, the telescopic rod is located on the inner side wall of the second spring, and an L-shaped pressure rod is fixedly installed on the side end of the L-shaped connecting rod, and the side end of the L-shaped pressure rod is penetrated by a first limiting groove and a second limiting groove, and the first limiting groove is located at the upper end of the second limiting groove.

[0011] Preferably, a power supply device is fixedly mounted on the side end of the air pump, a switch button is provided on the upper end of the power supply device, and the upper end of the L-shaped pressure rod is located above the air pump.

[0012] Preferably, an air guide tube is fixedly mounted on the side end of the air pump, a gas diversion tube is fixedly mounted on the lower end of the air guide tube, and the inner side walls of two one-way air inlet valves are fixedly mounted on the end of the gas diversion tube.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. In the present invention, an air pump, a discharge shell and a storage bag are provided to cooperate with each other. Air is injected into the discharge shell by the air pump, and the discharge shell is squeezed to inject slurry into the pile to achieve continuous unloading. The slurry is squeezed and unloaded by the storage bag, which can effectively reduce the segregation of the slurry. The slow squeezing process of the storage bag by gas makes the slurry flow more stably, thereby improving the overall quality of the slurry.

[0015] 2. In the present invention, the slurry is unloaded by gas extrusion. When unloading the slurry, the extrusion force of the slurry can be accurately controlled by adjusting the pressure of the storage bag, thereby achieving accurate control of the unloading amount. The storage bag can extrude the slurry more evenly, so that the slurry can be discharged from the storage bag more thoroughly and reduce residue. Compared with gravity unloading, extrusion unloading can better overcome the viscosity and adhesion of the slurry and improve the efficiency and thoroughness of unloading.

[0016] 3. In the present invention, an air guide tube and a gas diversion tube are provided. The setting of the gas diversion tube can realize squeezing the storage bag from both sides at the same time. The force of the gas is more evenly distributed on the storage bag, so that the storage bag can squeeze out the slurry faster, thereby improving the efficiency of unloading. Moreover, by evenly squeezing the balloon, the segregation of the slurry during the flow process can be reduced, the particles in the slurry can be better combined together, and the overall performance of the slurry can be improved.

[0017] 4. In the present invention, by providing an L-shaped pressure rod, an L-shaped connecting rod and a rack, it is achieved that when the air pump is opened to squeeze the storage bag, the valve plate in the discharge valve tube is driven to open, and when the air pump is closed after unloading, the valve plate can also be driven to rotate and close in the discharge valve tube, thereby achieving precise material control during unloading. This synchronous operation method realizes a certain degree of automation, reduces the time and steps of manual intervention, and construction personnel do not need to operate the air pump and the discharge valve tube separately, but only need to control the opening and closing of the air pump, thereby improving the construction efficiency. Due to the synchronous action of the air pump and the discharge valve tube, the unloading of the slurry can be carried out continuously, avoiding interruptions and waiting time caused by asynchronous operation.

[0018] 5. In the present invention, by cooperating with the side plate and the limit plug, when the L-shaped pressure rod, the L-shaped connecting rod and the rack cooperate to link the discharge valve pipe and the air pump to open and close at the same time, the L-shaped pressure rod can be limited by inserting the limit plug in the first limit groove or the second limit groove, thereby ensuring the precise limit of the position of the L-shaped pressure rod during actual work, realizing stable and continuous unloading of the material control mechanism, and not being affected by the vibration when the equipment is started. When there is no need to work, it can also avoid the accidental start-up of the machine caused by accidental touch, resulting in waste of raw materials, etc., thereby ensuring the stability of the equipment during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the vehicle body structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the structure of the unloading shell of the present invention;

[0021] Figure 3 It is a schematic diagram of the explosion structure of the discharge shell of the present invention;

[0022] Figure 4 It is a schematic diagram of the explosion structure of the storage bag of the present invention;

[0023] Figure 5 It is a schematic diagram of the explosion structure of the discharge valve pipe of the present invention;

[0024] Figure 6 It is a schematic diagram of the L-shaped connecting rod structure of the present invention;

[0025] Figure 7 It is a schematic diagram of the L-shaped pressure rod structure of the present invention;

[0026] Figure 8 It is a schematic diagram of the exploded structure of the side plate of the present invention;

[0027] Fig. 9 The present invention Figure 6 A schematic diagram of the enlarged structure.

[0028] In the figure, the corresponding relationship between the component names and the figure numbers is: 1. body; 11. storage box; 12. pump suction pipe; 2. unloading shell; 21. outlet slot; 22. cover plate; 23. one-way air inlet valve; 24. L-shaped fixing plate; 25. inlet slot; 3. storage bag; 31. mounting rod; 32. one-way feed valve; 33. discharge valve pipe; 35. circular groove; 36. valve plate; 37. rotating shaft; 38. gear; 4. side plate; 41. rectangular groove; 42. limit plug rod; 43. pull plate; 45. first spring; 5. rack; 51. second spring; 52. telescopic rod; 6. L-shaped connecting rod; 61. L-shaped pressure rod; 62. first limit slot; 63. second limit slot; 7. air pump; 71. power supply equipment; 72. switch button; 73. air guide pipe; 74. gas diversion pipe. DETAILED DESCRIPTION

[0029] The following is a further detailed description of the embodiments of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0030] See also Figure 1 - Fig. 9The present invention provides a convenient cargo box automatic unloading device, including a vehicle body 1 and a storage cargo box 11, the storage cargo box 11 is fixedly installed on the vehicle body 1, the vehicle body 1 is provided with a unloading mechanism for facilitating the rapid unloading of the storage cargo box 11, the vehicle body 1 is provided with a material control mechanism for facilitating the unloading and control of slurry, the unloading mechanism includes a unloading shell 2, a storage bag 3 and an air pump 7, the material control mechanism includes a side plate 4, a rack 5 and an L-shaped connecting rod 6, the unloading shell 2 is fixedly installed on the side end of the storage cargo box 11, the side end of the storage bag 3 is fixedly installed with two mounting rods 31, the storage bag 3 is connected to the storage bag 3 by the two mounting rods 3 1 is fixedly mounted on the inner side wall of the discharge housing 2, the side plate 4 is fixedly mounted on the side end of the vehicle body 1, the rack 5 is located at the lower end of the discharge housing 2, the rack 5 is fixedly mounted on the lower end of the L-shaped connecting rod 6, the air pump 7 is fixedly mounted on the side end of the storage box 11, and the storage box 11 is provided with a pump suction pipe 12. The user can first pump a certain amount of slurry from the storage box 11 into the storage bag 3 through the pump suction pipe 12, and the slurry in the storage box 11 enters the storage bag 3 through the pump suction pipe 12. The amount of slurry pumped into the storage bag 3 should be at least greater than or equal to the amount of slurry required for one discharge;

[0031] An outlet groove 21 is penetrated through the lower end of the discharge shell 2, a cover plate 22 is movably sleeved on the upper end of the discharge shell 2, two one-way air inlet valves 23 are arranged on the upper end of the cover plate 22, an L-shaped fixing plate 24 is fixedly installed on the lower end of the discharge shell 2, an inlet groove 25 is penetrated through the upper end of the cover plate 22, a one-way feed valve 32 is arranged on the upper end of the storage bag 3, a pump suction pipe 12 penetrates the inner side wall of the L-shaped fixing plate 24, an end of the pump suction pipe 12 is fixedly installed on the inner side wall of the one-way feed valve 32, a discharge valve pipe 33 is fixedly installed on the lower end of the storage bag 3, a circular groove 35 is penetrated through the circumferential end of the discharge valve pipe 33, a valve plate 36 is arranged on the inner side wall of the discharge valve pipe 33, a rotating shaft 37 is fixedly installed on the side end of the valve plate 36, and a rotating shaft 37 is fixedly installed on the rotating shaft 3 A gear 38 is fixedly installed on the circumferential end of 7, and the rotating shaft 37 penetrates and is rotatably installed on the inner side wall of the circular groove 35. The gear 38 and the rack 5 are meshed. A rectangular groove 41 is penetrated and opened on the side end of the side plate 4. A limit rod 42 is slidably installed on the inner side wall of the rectangular groove 41. A pull plate 43 is fixedly installed on the side end of the limit rod 42. Two first springs 45 are fixedly installed between the pull plate 43 and the side plate 4. After the pump is completed, the user can perform the unloading work. When unloading, the user can pull the pull plate 43. The movement of the pull plate 43 will drive the limit rod 42 to slide in the rectangular groove 41 and the second limit groove 63. After the limit rod 42 slides away from the inner side wall of the second limit groove 63, the limit rod 42 no longer limits the L-shaped pressure rod 61.

[0032] A second spring 51 is fixedly installed between the rack 5 and the L-shaped fixing plate 24, and a telescopic rod 52 is also fixedly installed between the rack 5 and the L-shaped fixing plate 24. The telescopic rod 52 is located on the inner side wall of the second spring 51. An L-shaped pressure rod 61 is fixedly installed on the side end of the L-shaped connecting rod 6. A first limiting groove 62 and a second limiting groove 63 are penetrated through the side end of the L-shaped pressure rod 61. The first limiting groove 62 is located at the upper end of the second limiting groove 63. The user can pull the L-shaped pressure rod 61 to move downward, and the L-shaped pressure rod 61 will move downward at the same time The first limiting groove 62 and the second limiting groove 63 are driven to move downward. When the L-shaped pressure rod 61 moves downward to drive the position of the first limiting groove 62 to coincide with the limiting plug rod 42, the L-shaped pressure rod 61 just presses the switch button 72, and the air pump 7 is driven to start by the power supply device 71. The user can release the pull plate 43, and the two first springs 45 will drive the limiting plug rod 42 to reset through the pull plate 43. The limiting plug rod 42 will be inserted into the inner side wall of the rectangular groove 41 and the first limiting groove 62 again, completing the adjustment of the L-shaped pressure rod 61.

[0033] A power supply device 71 is fixedly installed at the side end of the air pump 7, and a switch button 72 is provided at the upper end of the power supply device 71. The upper end of the L-shaped pressure rod 61 is located above the air pump 7. An air guide tube 73 is fixedly installed at the side end of the air pump 7, and a gas shunt tube 74 is fixedly installed at the lower end of the air guide tube 73. The inner side walls of two one-way air inlet valves 23 are fixedly installed at the ends of the gas shunt tube 74. When the L-shaped pressure rod 61 moves downward, it will also drive the L-shaped connecting rod 6 to move downward. The downward movement of the L-shaped connecting rod 6 will drive the rack 5 to move downward. At this time, the second spring 5 1 and the telescopic rod 52 are compressed, the rack 5 moves to drive the gear 38 to rotate, and the rotation of the gear 38 drives the valve plate 36 to rotate in the discharge valve pipe 33 through the rotating shaft 37. At this time, the valve plate 36 in the discharge valve pipe 33 will rotate and open. After the air pump 7 is started, the air pump 7 will inject gas into the discharge housing 2 through the air guide pipe 73 and the gas diversion pipe 74. The storage bag 3 in the discharge housing 2 will be deformed and squeeze the slurry in the storage bag 3. The slurry in the storage bag 3 will be squeezed and flow out from the discharge valve pipe 33 to discharge, thereby realizing continuous discharge of the slurry.

[0034] Working principle:

[0035] The first step is that in many industrial production processes, slurry is an important raw material or intermediate product. Timely and efficient slurry unloading can ensure the smooth progress of the production process and avoid production interruption due to untimely material supply. When unloading the slurry, a certain amount of slurry can be pumped into the storage bag 3 through the pump suction pipe 12 on the storage box 11. After the pumping is completed, the user can pull the pull plate 43 to drive the limiting rod 42 to leave the inner wall of the second limiting groove 63, pull the L-shaped pressure rod 61 downward to press the switch button 72 to start the air pump 7, and at the same time drive the rack 5 downward to drive the valve plate 36 to rotate and open. At this time, the air pump 7 injects driving gas through the gas diversion pipe 74 to continuously squeeze the storage bag 3, so that the slurry in the storage bag 3 flows out from the discharge valve pipe 33 to unload;

[0036] In the second step, before unloading the slurry, the user can drive the vehicle body 1 to a suitable position. The user can first pump a certain amount of slurry from the storage box 11 into the storage bag 3 through the pump suction tube 12. The slurry in the storage box 11 enters the storage bag 3 through the pump suction tube 12. The amount of slurry pumped into the storage bag 3 should be at least greater than or equal to the amount of slurry required for one unloading or processing. After the pumping is completed, the user can carry out the unloading work. When unloading, the user can pull the pull plate 43. The movement of the pull plate 43 will drive the limit rod 42 to slide in the rectangular groove 41 and the second limit groove 63. After the limit rod 42 slides away from the inner side wall of the second limit groove 63, the limit rod 42 The positioning rod 42 no longer limits the L-shaped pressure rod 61, and the user can pull the L-shaped pressure rod 61 to move downward. The downward movement of the L-shaped pressure rod 61 will simultaneously drive the first limiting groove 62 and the second limiting groove 63 to move downward. When the L-shaped pressure rod 61 moves downward and drives the position of the first limiting groove 62 to coincide with the limiting rod 42, the L-shaped pressure rod 61 just presses the switch button 72, and the air pump 7 is driven to start by the power supply device 71. The user can release the pull plate 43, and the two first springs 45 will drive the limiting rod 42 to reset through the pull plate 43, and the limiting rod 42 will be inserted into the inner side wall of the rectangular groove 41 and the first limiting groove 62 again, completing the adjustment of the L-shaped pressure rod 61;

[0037] In the third step, when the L-shaped pressure rod 61 moves downward, it will also drive the L-shaped connecting rod 6 to move downward. The downward movement of the L-shaped connecting rod 6 will drive the rack 5 to move downward. At this time, the second spring 51 and the telescopic rod 52 are compressed, and the movement of the rack 5 will drive the gear 38 to rotate. The rotation of the gear 38 will drive the valve plate 36 to rotate in the discharge valve pipe 33 through the rotating shaft 37. At this time, the valve plate 36 in the discharge valve pipe 33 will rotate and open. After the air pump 7 is started, the air pump 7 will inject gas into the discharge housing 2 through the air guide pipe 73 and the gas diversion pipe 74. The storage bag 3 in the discharge housing 2 will be deformed and squeeze the slurry in the storage bag 3. The slurry in the storage bag 3 will be squeezed and discharged from the discharge valve pipe 33, thereby realizing continuous discharge of the slurry.

[0038] The device is provided with an air pump 7, a discharge shell 2 and a storage bag 3, and air is injected into the discharge shell 2 through the air pump 7, and the discharge shell 2 is squeezed to inject slurry into the pile, so as to realize continuous discharge. The storage bag 3 is squeezed to discharge, which can effectively reduce the segregation of slurry. The storage bag 3 is slowly squeezed by gas to make the slurry flow more stably, thereby improving the overall quality of the slurry.

[0039] The device discharges the slurry by setting up a gas extrusion method. When discharging the slurry, the pressure of the storage bag 3 can be adjusted to accurately control the extrusion force of the slurry, thereby achieving accurate control of the discharge amount. The storage bag 3 can extrude the slurry more evenly, so that the slurry can be discharged from the storage bag 3 more thoroughly, reducing the residue. Compared with gravity unloading, extrusion unloading can better overcome the viscosity and adhesion of the slurry, and improve the efficiency and thoroughness of unloading;

[0040] The device is provided with an air guide tube 73 and a gas diversion tube 74. The provision of the gas diversion tube 74 can realize squeezing the storage bag 3 from both sides at the same time. The force of the gas is more evenly distributed on the storage bag 3, so that the storage bag 3 can squeeze out the slurry faster, thereby improving the efficiency of unloading. Moreover, by evenly squeezing the balloon, the segregation phenomenon of the slurry during the flow process can be reduced, so that the particles in the slurry are better combined together, thereby improving the overall performance of the slurry.

[0041] Step 4. After completing one unloading, there is no need to squeeze the storage bag 3 anymore. The user can pull the pull plate 43 again to drive the limiting rod 42 to move out of the second limiting groove 63. At this time, the second spring 51 will rebound and drive the rack 5 to move upward, and at the same time drive the L-shaped connecting rod 6 and the L-shaped pressure rod 61 to move upward. At this time, the switch button 72 on the air pump 7 is no longer pressed to turn off the air pump 7, and the rack 5 moves and resets to drive the gear 38 to rotate, thereby driving the valve plate 36 to rotate and close in the discharge valve pipe 33, so that the discharge valve pipe 33 is closed while the air pump 7 is turned off;

[0042] The device is provided with an L-shaped pressure rod 61, an L-shaped connecting rod 6 and a rack 5, so that when the air pump 7 is opened to squeeze the material storage bag 3, the valve plate 36 in the discharge valve tube 33 is driven to open, and when the air pump 7 is closed after unloading, the valve plate 36 can also be driven to rotate and close in the discharge valve tube 33, thereby realizing accurate material control during unloading. This synchronous operation mode realizes a certain degree of automation, reduces the time and steps of manual intervention, and construction personnel do not need to operate the air pump 7 and the discharge valve tube 33 separately, but only need to control the opening and closing of the air pump 7, thereby improving the construction efficiency. Due to the synchronous action of the air pump 7 and the discharge valve tube 33, the unloading of the slurry can be realized continuously, avoiding the interruption and waiting time caused by asynchronous operation.

[0043] The device is provided with a side plate 4 and a limit rod 42, and when the L-shaped pressure rod 61, the L-shaped connecting rod 6 and the rack 5 cooperate to link the discharge valve pipe 33 and the air pump 7 to open and close at the same time, the L-shaped pressure rod 61 can be limited by inserting the limit rod 42 in the first limit groove 62 or the second limit groove 63, thereby ensuring the precise limit of the position of the L-shaped pressure rod 61 during actual work, realizing stable and continuous unloading of the material control mechanism, and not being affected by the vibration when the equipment is started. When there is no need to work, it can also avoid the accidental start-up of the machine caused by accidental touch, resulting in waste of raw materials, etc., thereby ensuring the stability of the equipment during use.

[0044] The examples of the present invention are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention and to enable those of ordinary skill in the art to understand the present invention and to design various embodiments with various modifications suitable for specific uses.

Claims

1. A portable automatic unloading device for a cargo box, comprising a vehicle body (1) and a storage cargo box (11), wherein the storage cargo box (11) is fixedly mounted on the vehicle body (1), and characterized in that: The vehicle body (1) is provided with a material unloading mechanism for facilitating rapid unloading of the material storage box (11), and the vehicle body (1) is provided with a material control mechanism for facilitating material unloading and material control of the slurry; The unloading mechanism comprises a unloading shell (2), a material storage bag (3) and an air pump (7); the material control mechanism comprises a side plate (4), a rack (5) and an L-shaped connecting rod (6); the unloading shell (2) is fixedly mounted on the side end of the material storage box (11); two mounting rods (31) are fixedly mounted on the side end of the material storage bag (3); the material storage bag (3) is fixedly mounted on the inner side wall of the unloading shell (2) through the two mounting rods (31); the side plate (4) is fixedly mounted on the side end of the vehicle body (1); the rack (5) is located at the lower end of the unloading shell (2); the rack (5) is fixedly mounted on the lower end of the L-shaped connecting rod (6); and the air pump (7) is fixedly mounted on the side end of the material storage box (11).

2. A portable automatic unloading device for cargo boxes as claimed in claim 1, characterized in that: The material storage box (11) is provided with a pump suction pipe (12), the lower end of the material discharge shell (2) is penetrated by an outlet groove (21), and the upper end of the material discharge shell (2) is movably sleeved with a cover plate (22); The upper end of the cover plate (22) is provided with two one-way air inlet valves (23), the lower end of the discharge housing (2) is fixedly mounted with an L-shaped fixing plate (24), and the upper end of the cover plate (22) is penetrated by an inlet groove (25).

3. A portable automatic unloading device for cargo boxes as claimed in claim 2, characterized in that: A one-way feed valve (32) is provided at the upper end of the storage bag (3), the pump suction pipe (12) passes through the inner wall of the L-shaped fixing plate (24), and the end of the pump suction pipe (12) is fixedly mounted on the inner wall of the one-way feed valve (32).

4. A portable automatic unloading device for cargo boxes as claimed in claim 3, characterized in that: A discharge valve tube (33) is fixedly mounted on the lower end of the material storage bag (3), a circular groove (35) is penetrated through the circumferential end of the discharge valve tube (33), and a valve plate (36) is provided on the inner side wall of the discharge valve tube (33).

5. A portable automatic unloading device for cargo boxes as claimed in claim 4, characterized in that: A rotating shaft (37) is fixedly mounted on the side end of the valve plate (36), a gear (38) is fixedly mounted on the circumferential end of the rotating shaft (37), and the rotating shaft (37) penetrates and is rotatably mounted on the inner side wall of the circular groove (35); The gear (38) and the rack (5) are meshed with each other.

6. A portable automatic unloading device for cargo boxes as claimed in claim 5, characterized in that: A rectangular groove (41) is formed through the side end of the side plate (4), a limit rod (42) is slidably mounted on the inner side wall of the rectangular groove (41), and a pull plate (43) is fixedly mounted on the side end of the limit rod (42); Wherein, two first springs (45) are fixedly installed between the pulling plate (43) and the side plate (4).

7. A portable automatic unloading device for cargo boxes as claimed in claim 6, characterized in that: A second spring (51) is fixedly installed between the rack (5) and the L-shaped fixing plate (24), and a telescopic rod (52) is also fixedly installed between the rack (5) and the L-shaped fixing plate (24), wherein the telescopic rod (52) is located on the inner side wall of the second spring (51).

8. A portable automatic unloading device for cargo boxes as claimed in claim 7, characterized in that: An L-shaped pressure rod (61) is fixedly mounted on the side end of the L-shaped connecting rod (6), and a first limiting groove (62) and a second limiting groove (63) are penetrated through the side end of the L-shaped pressure rod (61), wherein the first limiting groove (62) is located at the upper end of the second limiting groove (63).

9. A portable automatic unloading device for cargo boxes as claimed in claim 8, characterized in that: A power supply device (71) is fixedly mounted on the side end of the air pump (7), and a switch button (72) is provided on the upper end of the power supply device (71); Wherein, the upper end portion of the L-shaped pressure rod (61) is located above the air pump (7).

10. A portable automatic unloading device for cargo boxes as claimed in claim 9, characterized in that: An air guide tube (73) is fixedly mounted on the side end of the air pump (7), and a gas diversion tube (74) is fixedly mounted on the lower end of the air guide tube (73); Wherein, the inner side walls of two one-way air inlet valves (23) are fixedly mounted at the end of the gas diversion pipe (74).

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