A compact structure conveying device and a material feeding and discharging machine

Abstract

The application relates to the technical field of material feeding and discharging equipment, in particular to a compact conveying device and a material feeding and discharging machine, which comprises a translation conveying module, a first lifting driving mechanism, a lifting seat, a conveying driving mechanism and a rotating driving mechanism. The translation conveying module comprises a supporting seat, a translation plate, a slave pulley, a conveying belt, a rack, a transmission gear meshing with the rack, a supporting rod arranged on the supporting seat and a supporting rolling element rotationally connected to the supporting rod. The conveying driving mechanism is used for driving the conveying belt to rotate, and the rotating driving mechanism is used for driving the transmission gear to rotate. The translation plate is provided with a through hole and a translation groove, the supporting rod penetrates through the through hole, and the supporting rolling element rolls against the inner wall of the translation groove. The translation of the translation plate and the rotation of the conveying belt are flexibly integrated together, the structure design is ingenious and compact, a plurality of combined conveying modes can be formed, the use range is wide, and the translation conveying module is in a cantilever state, so that the layout of the conveying device and external structures is compact.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of material loading and unloading equipment, in particular to a compact conveying device and material loading and unloading machine. BACKGROUND

[0002] When the material loading and unloading machine loads or unloads the material, the conveying device or the mechanical hand is generally used to convey the material to the material frame; when the conveying device is used to load or unload the material, the mechanism corresponding to the action function is generally stacked and assembled according to the action involved in the loading or unloading. For example, the Chinese patent document with the application number 201820753685.0 discloses an intelligent flexible manufacturing conveying platform lifting and translating belt seat, which comprises a guide rail, a synchronous belt, a synchronous wheel, an upper fixed plate and a motor. The guide rail is connected with a motor fixing block, the motor fixing block is fixed with the motor, the motor is connected with a driving wheel, the driving wheel is connected to the synchronous wheel through the synchronous belt, the synchronous wheel is provided with a bearing in the middle, the bearing is provided with a nut, the guide rail bottom is provided with the upper fixed bottom plate, the upper fixed bottom plate is installed with a gas cylinder below, the gas cylinder is connected with a bottom fixed bottom plate below, the upper fixed bottom plate and the bottom fixed bottom plate are provided with a guide shaft and a linear bearing between them; the patent document can realize lifting and rotation of the synchronous belt to meet the lifting and conveying of the material. On the basis of the patent document, if the translation function is also required, a translation driving mechanism is generally added below the bottom fixed bottom plate, the translation driving mechanism drives the bottom fixed bottom plate to translate. The simple stacking of such functional modules makes the structure not compact enough, occupies a large space, and is not conducive to the compact layout of devices in the equipment. Therefore, the defect is obvious, and a solution is urgently needed. SUMMARY

[0003] In order to solve the above technical problems, the purpose of the present application is to provide a compact conveying device and material loading and unloading machine.

[0004] In order to achieve the above purpose, the present application adopts the following technical scheme:

[0005] The application discloses a compact conveying device, which comprises a translation conveying module, a first lifting driving mechanism, a lifting seat arranged on the lifting end of the first lifting driving mechanism, and a conveying driving mechanism and a rotating driving mechanism arranged on the lifting seat respectively, the translation conveying module comprises a supporting seat arranged on the lifting seat, a cantilevered translation plate arranged on the supporting seat, two slave pulleys rotatably connected to the two ends of the translation plate, a conveying belt transmissionally sleeved outside the two slave pulleys, a rack arranged on the bottom surface of the translation plate, a transmission gear rotatably connected to the supporting seat and meshed with the rack, a supporting rod arranged on the supporting seat, and a supporting rolling element rotatably connected to the supporting rod, the conveying driving mechanism is used for driving the conveying belt to rotate, the rotating driving mechanism is used for driving the transmission gear to rotate, the translation plate is provided with a through hole and a translation slot in communication with the through hole, the supporting rod penetrates through the through hole, and the supporting rolling element rolls against the inner wall of the translation slot, and the extension directions of the through hole and the translation slot are parallel to the translation direction of the translation plate.

[0006] Further, the number of the translation slots is two, the two translation slots are located on the two sides of the through hole, the number of the supporting rods is multiple, the multiple supporting rods are arranged in a straight line, each supporting rod is rotatably connected with two supporting rolling elements, and the two supporting rolling elements on each supporting rod are arranged in the two translation slots respectively.

[0007] Further, the number of the racks is two, the conveying belt is located between the two racks, the transmission gear is provided with two sets of gear teeth on the circumferential side, the two sets of gear teeth are transmissionally meshed with the two racks respectively, the two sets of gear teeth form an avoiding space, and the conveying belt is located in the avoiding space.

[0008] Further, the rotating driving mechanism comprises a first rotating shaft rotatably connected to the lifting seat, a driving gear sleeved on the first rotating shaft, and a first rotating driver arranged on the lifting seat and used for driving the first rotating shaft to rotate, and the driving gear is meshed with the transmission gear; the conveying driving mechanism comprises a second rotating shaft rotatably connected to the lifting seat, a transmission wheel sleeved on the first rotating shaft, and a second rotating driver arranged on the lifting seat and used for driving the second rotating shaft to rotate, and the conveying belt is transmissionally wound outside the transmission wheel.

[0009] Further, the number of the translation conveying modules, the number of the driving gears and the number of the transmission wheels are all multiple, the multiple translation conveying modules, the multiple driving gears and the multiple transmission wheels are arranged in a one-to-one correspondence respectively, the multiple translation conveying modules are arranged in parallel, the conveying driving mechanism is used for driving the conveying belts of all the translation conveying modules to rotate, and the rotating driving mechanism is used for driving the transmission gears of all the translation conveying modules to rotate.

[0010] Further, each translation conveying module has two transmission gears, and the two transmission gears are located on the two sides of the driving gear.

[0011] Further, the top surface of the translation plate is provided with a guide belt support plate, the top surface of the guide belt support plate is concavely provided with a limiting groove, and the conveying belt is movably arranged in the limiting groove.

[0012] Further, the support seat is rotationally connected with a tensioning guide belt wheel, and the tensioning guide belt wheel is used for abutting against the conveying belt.

[0013] Further, the number of the tensioning guide belt wheels is two, and the two tensioning guide belt wheels are respectively located above the two sides of the transmission wheel.

[0014] The application further provides a material loading and unloading machine, which comprises a second lifting driving mechanism, a material loading frame and the conveying device, the material loading frame is arranged on the lifting end of the second lifting driving mechanism, the conveying device is arranged on one side of the material loading frame, the material loading frame is provided with a plurality of material loading structures from top to bottom, the material loading structure comprises a side insertion groove and a material loading groove in communication with the top port of the side insertion groove, and the side insertion groove is used for inserting the translation plate into the material loading frame.

[0015] The application has the following beneficial effects: in actual application, the first lifting driving mechanism drives the lifting seat to lift the translation conveying module, the lifting translation conveying module can place the material carried thereon on the external structure or support the material of the external structure; the rotation driving mechanism drives the transmission gear to rotate, the rotating transmission gear is engaged with the rack to drive the rack to move together with the translation plate and the two driven pulleys, in the process of moving the translation plate, the transmission gear not only drives the rack, but also supports the translation plate, the supporting rolling element rolls against the inner wall of the translation groove, the supporting rolling element can not only support the translation plate, but also guide the movement of the translation plate, the stability of the movement of the translation plate is improved, and since the two driven pulleys move synchronously with the translation plate, the conveying belt moves with the translation plate under the cooperation of the driven pulleys and the conveying belt, and the moving conveying belt carries the material to move with the translation plate; the conveying driving mechanism drives the conveying belt to rotate, and the rotating conveying belt conveys the material. In use, the translation conveying module is in a cantilever state, which is conducive to the compact layout of the conveying device and the external structure (such as a roller conveying mechanism), greatly reduces the volume of the equipment, and can not only complete the lifting of the translation conveying module, the translation of the translation plate or the rotation of the conveying belt, but also form a plurality of combined conveying modes by using at least two conveying modes of the lifting of the translation conveying module, the translation of the translation plate and the rotation of the conveying belt, so as to meet the conveying requirements of the material in different scenes. The translation of the translation plate and the rotation of the conveying belt are flexibly integrated, the structure is ingenious and compact, a plurality of combined conveying modes can be formed, the conveying requirements of the material in different scenes can be met, the application has strong practicability, good universality, wide application range, and the translation conveying module is in a cantilever state, which is conducive to the compact layout of the conveying device and the external structure (such as a roller conveying mechanism), greatly reduces the volume of the equipment. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the material receiving and unloading machine of the present invention.

[0017] Figure 2 This is a three-dimensional structural diagram of the translational conveying module of the present invention.

[0018] Figure 3 This is a three-dimensional structural schematic diagram of the translational conveying module of the present invention from another perspective.

[0019] Figure 4 This is a three-dimensional structural diagram of the translation plate of the present invention.

[0020] Figure 5 This is a three-dimensional structural diagram of the transmission gear of the present invention.

[0021] Figure 6 This is a three-dimensional structural diagram of the first lifting drive mechanism, the conveying drive mechanism, and the rotating drive mechanism of the present invention.

[0022] Figure 7 This is a three-dimensional structural diagram of the support base, translation plate, conveyor belt, support rod, and support rolling element of the present invention.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Translation conveyor module; 2. First lifting drive mechanism; 3. Lifting seat; 4. Conveying drive mechanism; 5. Rotation drive mechanism; 6. Support seat; 7. Translation plate; 8. Driven pulley; 9. Conveyor belt; 10. Rack; 11. Transmission gear; 12. Support rod; 13. Support rolling element; 14. Through hole; 15. Translation groove; 16. Gear assembly; 17. First rotating shaft; 18. Drive gear; 19. First rotation driver; 20. Second rotating shaft; 21. Transmission wheel; 22. Second rotation driver; 23. Guide belt support plate; 24. Limiting groove; 25. Tensioning guide belt pulley; 26. Second lifting drive mechanism; 27. Material frame; 28. Side slot; 29. ​​Material trough; 30. Material; 31. Clearance space. Detailed Implementation

[0025] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and accompanying drawings. The content mentioned in the embodiments is not intended to limit the present invention.

[0026] like Figures 1 to 7As shown, the present invention provides a compact conveying device, which includes a translational conveying module 1, a first lifting drive mechanism 2, a lifting seat 3 mounted on the lifting end of the first lifting drive mechanism 2, and a conveying drive mechanism 4 and a rotation drive mechanism 5 respectively mounted on the lifting seat 3. The translational conveying module 1 includes a support seat 6 mounted on the lifting seat 3, a cantilevered translational plate 7 mounted on the support seat 6, two driven pulleys 8 rotatably connected to both ends of the translational plate 7, a conveyor belt 9 transmissionally sleeved on the two driven pulleys 8, a rack 10 mounted on the bottom surface of the translational plate 7, and a rack 10 rotatably connected to the support seat 3. The support base 6 has a transmission gear 11 that meshes with the rack 10, a support rod 12 mounted on the support base 6, and a support rolling element 13 rotatably connected to the support rod 12. The translation plate 7 is located in the annular space of the conveyor belt 9. The conveying drive mechanism 4 is used to drive the conveyor belt 9 to rotate, and the rotation drive mechanism 5 is used to drive the transmission gear 11 to rotate. The translation plate 7 is provided with a through hole 14 and a translation groove 15 communicating with the through hole 14. The support rod 12 passes through the through hole 14, and the support rolling element 13 rolls against the inner wall of the translation groove 15. The extension direction of the through hole 14 and the translation groove 15 is parallel to the translation direction of the translation plate 7.

[0027] In practical applications, the first lifting drive mechanism 2 drives the lifting seat 3, along with the translation conveying module 1, to rise and fall. The lifting translation conveying module 1 can place the material 30 it carries on an external structure (such as a roller conveyor mechanism) or lift the material 30 from the external structure. The rotation drive mechanism 5 drives the transmission gear 11 to rotate. The rotating transmission gear 11 meshes with the rack 10 to drive the rack 10, along with the translation plate 7 and two driven pulleys 8, to move. During the translation of the translation plate 7, the transmission gear 11 not only meshes with the rack 10 for transmission but also provides support for the translation plate 7. The function of the supporting roller 13 is to support the rolling contact between the inner wall of the translation groove 15 and the rolling contact between the roller 13 and the translation groove 15. The supporting roller 13 not only supports the translation plate 7, but also guides the movement of the translation plate 7, which improves the stability of the movement of the translation plate 7. Since the two driven pulleys 8 move synchronously with the translation plate 7, the conveyor belt 9 will move with the translation plate 7 under the cooperation of the driven pulleys 8 and the conveyor belt 9. The moving conveyor belt 9 will drive the material 30 to move with the translation plate 7. The conveying drive mechanism 4 drives the conveyor belt 9 to rotate, and the rotating conveyor belt 9 will convey the material 30. When in use, the translational conveying module 1 is in a cantilever state, which is conducive to the compact layout of this conveying device and external structures (such as roller conveying mechanisms, etc.), greatly reducing the size of the equipment. It can independently complete the lifting of the translational conveying module 1, the translation of the translational plate 7, or the rotation of the conveyor belt 9. It can also combine at least two of the following conveying methods to form a variety of combined conveying methods, thereby meeting the needs of conveying materials 30 in different scenarios.

[0028] This invention integrates the translation of the translation plate 7 and the rotation of the conveyor belt 9 into a flexible structure. The structure is ingenious and compact, and can form a variety of combined conveying methods, thereby meeting the needs of conveying materials 30 in different scenarios. It is highly practical, versatile, and widely used. Moreover, the translation conveying module 1 is in a cantilever state, which is conducive to the compact layout of this conveying device with external structures (such as roller conveying mechanisms), greatly reducing the size of the equipment.

[0029] Specifically, the supporting rolling element 13 can be a roller or a bearing.

[0030] In this embodiment, there are two translation slots 15 located on both sides of the through hole 14. There are multiple support rods 12 arranged in a straight line, and each support rod 12 is rotatably connected to two supporting rollers 13. The two supporting rollers 13 on each support rod 12 are respectively disposed within the two translation slots 15. This structural design increases the number of supporting rollers 13, thereby increasing the supporting force on the translation plate 7 and further improving the translation stability of the translation plate 7.

[0031] In this embodiment, there are two racks 10, the conveyor belt 9 is located between the two racks 10, and the transmission gear 11 is provided with two rings of teeth 16 on its periphery. The two rings of teeth 16 are respectively engaged with the two racks 10, and a clearance space 31 is formed between the two rings of teeth 16. The conveyor belt 9 is located in the clearance space 31.

[0032] In this embodiment, the rotation drive mechanism 5 includes a first rotating shaft 17 rotatably connected to the lifting seat 3, a drive gear 18 mounted on the first rotating shaft 17, and a first rotation driver 19 mounted on the lifting seat 3 for driving the first rotating shaft 17 to rotate. The drive gear 18 meshes with the transmission gear 11. The conveying drive mechanism 4 includes a second rotating shaft 20 rotatably connected to the lifting seat 3, a transmission wheel 21 mounted on the first rotating shaft 17, and a second rotation driver 22 mounted on the lifting seat 3 for driving the second rotating shaft 20 to rotate. The conveyor belt 9 is driven around the transmission wheel 21.

[0033] In practical applications, the first rotary driver 19 drives the first rotating shaft 17 to rotate. The rotating first rotating shaft 17 drives the drive gear 18 to rotate. The rotating drive gear 18 meshes with the transmission gear 11 to drive the transmission gear 11 to rotate. The rotating transmission gear 11 meshes with the rack 10 to drive the rack 10 to move. The moving rack 10 drives the translation plate 7 to move. The second rotary driver 22 drives the second rotating shaft 20 to rotate. The rotating second rotating shaft 20 drives the transmission wheel 21 to rotate. The rotating transmission wheel 21 drives the conveyor belt 9 to rotate. During the movement of the translation plate 7, the conveyor belt 9, the transmission wheel 21, and the two driven pulleys 8 roughly form a fixed pulley structure. Similar to the principle of a fixed pulley, the conveyor belt 9 will move accordingly under the action of the two driven pulleys 8.

[0034] Specifically, the first rotary driver 19 and the second rotary driver 22 have the same structure, both consisting of a motor, a synchronous belt and a synchronous pulley.

[0035] In this embodiment, there are multiple translational conveying modules 1, multiple driving gears 18, and multiple transmission wheels 21. These multiple translational conveying modules 1, multiple driving gears 18, and multiple transmission wheels 21 are arranged in a one-to-one correspondence, and the multiple translational conveying modules 1 are arranged in parallel. The conveying drive mechanism 4 drives the conveyor belts 9 of all translational conveying modules 1 to rotate, and the rotation drive mechanism 5 drives the transmission gears 11 of all translational conveying modules 1 to rotate. In practical applications, depending on the type and size of the material 30, one material 30 can be conveyed using one translational conveying module 1, or at least two translational conveying modules 1 can be used to convey one material 30, offering versatility and flexibility. One conveying drive mechanism 4 can drive the conveyor belts 9 of all translational conveying modules 1 to rotate synchronously, and one rotation drive mechanism 5 can drive the translation plates 7 of all translational conveying modules 1 to move, greatly reducing the number of drive sources required, resulting in a compact structure and lower manufacturing and usage costs.

[0036] In this embodiment, each translational conveying module 1 has two transmission gears 11, which are located on both sides of the drive gear 18. In practical applications, one drive gear 18 drives the two transmission gears 11 to rotate synchronously, and the two transmission gears 11 simultaneously mesh with the rack 10. This improves the stability of the meshing transmission and increases the supporting force of the transmission gears 11 on the translational plate 7.

[0037] In this embodiment, a guide belt support plate 23 is installed on the top surface of the translation plate 7, and a limiting groove 24 is recessed on the top surface of the guide belt support plate 23. The conveyor belt 9 is movably disposed within the limiting groove 24. Specifically, there are multiple guide belt support plates 23, which are arranged at intervals along the length direction of the translation plate 7. In practical applications, the limiting groove 24 limits the conveyor belt 9, and the guide belt support plate 23 supports the conveyor belt 9, thereby improving the strength of the conveyor belt 9 in carrying the material 30 and making the conveyor belt 9 less prone to tensile deformation.

[0038] Specifically, the limiting groove 24 is polished to reduce the frictional resistance and wear of the conveyor belt 9.

[0039] In this embodiment, a tensioning guide wheel 25 is rotatably connected to the support base 6. The tensioning guide wheel 25 is used to abut against the conveyor belt 9. There are two tensioning guide wheels 25, which are located on both sides above the drive wheel 21. The tensioning guide wheels 25 position and guide the conveyor belt 9 and apply a certain tension to the conveyor belt 9, thereby improving the working stability of the conveyor belt 9.

[0040] The present invention also provides a material receiving and unloading machine, including a second lifting drive mechanism 26, a material carrying frame 27 and the above-mentioned conveying device. The material carrying frame 27 is installed at the lifting end of the second lifting drive mechanism 26, and the conveying device is located on one side of the material carrying frame 27. The material carrying frame 27 is provided with a multi-layer material carrying structure from top to bottom. The material carrying structure includes a side slot 28 and a material carrying groove 29 communicating with the top port of the side slot 28. The side slot 28 is used for inserting the translation plate 7 of the translation conveying module 1 into the material carrying frame 27. One side slot 28 corresponds to one translation plate 7 of the translation conveying module 1.

[0041] This material receiving and discharging machine can receive and discharge material 30. This embodiment will be described using the receiving of material 30 as an example. In practical applications, after the external roller conveyor conveys the material 30 to the top of the conveying device, the first lifting drive mechanism 2 of the conveying device drives the translation conveying module 1 to rise and lift the material 30 on the external roller conveyor. Then, the translation of the translation plate 7 and the rotation of the conveyor belt 9 work together to make the translation plate 7 drive the conveyor belt 9 to insert into the loading frame 27 from the side slot 28 and convey the material 30 to the loading trough 29. After the material 30 is conveyed to the position, the first lifting drive mechanism 2 drives the translation conveying module 1 to descend, so that the material 30 is placed in the loading trough 29 to realize the collection of the material 30. Finally, the rotation drive mechanism 5 drives the translation plate 7 to move out of the loading frame 27 from the side slot 28 and reset, so as to collect the next material 30. When the translation plate 7 moves out of the loading frame 27, the second lifting drive mechanism 26 drives the loading frame 27 to descend or rise by one layer of the loading structure, so that the loading frame 27 is ready to collect the next material 30. When the material loading frame 27 is receiving material from top to bottom, the second lifting drive mechanism 26 drives the material loading frame 27 to rise layer by layer from bottom to top; when the material loading frame 27 is receiving material from bottom to top, the second lifting drive mechanism 26 drives the material loading frame 27 to descend layer by layer from top to bottom.

[0042] Preferably, the material 30 can be a circuit board or other board component.

[0043] Specifically, both the first lifting drive mechanism 2 and the second lifting drive mechanism 26 can be driven by a mechanism consisting of a motor, a lead screw, a guide rail, and a slider.

[0044] All technical features in this embodiment can be freely combined according to actual needs.

[0045] The above embodiments are preferred implementations of the present invention. In addition, the present invention can be implemented in other ways. Any obvious substitutions without departing from the concept of the present technical solution are within the protection scope of the present invention.

Claims

1. A compact conveying device, characterized in that: The system includes a translational conveying module (1), a first lifting drive mechanism (2), a lifting seat (3) mounted on the lifting end of the first lifting drive mechanism (2), and a conveying drive mechanism (4) and a rotation drive mechanism (5) respectively mounted on the lifting seat (3). The translational conveying module (1) includes a support seat (6) mounted on the lifting seat (3), a translation plate (7) cantilevered and translatably mounted on the support seat (6), two pulleys (8) rotatably connected to both ends of the translation plate (7), and transmission sleeves mounted on the two pulleys. (8) An external conveyor belt (9), a rack (10) set on the bottom surface of the translation plate (7), a transmission gear (11) rotatably connected to the support base (6) and meshing with the rack (10), a support rod (12) mounted on the support base (6) and a support rolling element (13) rotatably connected to the support rod (12), a conveyor drive mechanism (4) for driving the conveyor belt (9) to rotate, a rotation drive mechanism (5) for driving the transmission gear (11) to rotate, and a through hole (14) provided on the translation plate (7) and a through hole ( 14) A connected translation groove (15) has a support rod (12) that passes through the through hole (14) and supports the rolling element (13) to roll against the inner wall of the translation groove (15). The extension direction of the through hole (14) and the translation groove (15) is parallel to the translation direction of the translation plate (7). There are two translation grooves (15), which are located on both sides of the through hole (14). There are multiple support rods (12), which are arranged in a straight line. Each support rod (12) is rotatably connected to two Each support rolling element (13) is provided. Two support rolling elements (13) on each support rod (12) are respectively set in two translation grooves (15). There are two racks (10). The conveyor belt (9) is located between the two racks (10). Two rings of toothed teeth (16) are provided on the periphery of the transmission gear (11). The two rings of toothed teeth (16) are respectively engaged with the two racks (10). A clearance space (31) is formed between the two rings of toothed teeth (16). The conveyor belt (9) is located in the clearance space (31).

2. The compact conveying device according to claim 1, characterized in that: The rotation drive mechanism (5) includes a first rotating shaft (17) rotatably connected to the lifting seat (3), a drive gear (18) mounted on the first rotating shaft (17), and a first rotation driver (19) mounted on the lifting seat (3) for driving the first rotating shaft (17) to rotate. The drive gear (18) meshes with the transmission gear (11). The conveying drive mechanism (4) includes a second rotating shaft (20) rotatably connected to the lifting seat (3), a transmission wheel (21) mounted on the second rotating shaft (20), and a second rotation driver (22) mounted on the lifting seat (3) for driving the second rotating shaft (20) to rotate. The conveyor belt (9) is driven around the transmission wheel (21).

3. The compact conveying device according to claim 2, characterized in that: The number of translational conveying modules (1), the number of drive gears (18), and the number of transmission wheels (21) are all multiple. Multiple translational conveying modules (1), multiple drive gears (18), and multiple transmission wheels (21) are arranged in a one-to-one correspondence. Multiple translational conveying modules (1) are arranged in parallel. The conveying drive mechanism (4) is used to drive the conveyor belts (9) of all translational conveying modules (1) to rotate. The rotation drive mechanism (5) is used to drive the transmission gears (11) of all translational conveying modules (1) to rotate.

4. The compact conveying device according to claim 3, characterized in that: Each translational conveying module (1) has two drive gears (11) located on both sides of the drive gear (18).

5. A compact conveying device according to claim 1, characterized in that: The top surface of the translation plate (7) is equipped with a guide belt support plate (23), and the top surface of the guide belt support plate (23) is recessed with a limiting groove (24). The conveyor belt (9) is moved and set in the limiting groove (24).

6. A compact conveying device according to claim 2, characterized in that: The support base (6) is rotatably connected to a tensioning guide pulley (25), which is used to abut the conveyor belt (9).

7. A compact conveying device according to claim 6, characterized in that: There are two tensioning guide pulleys (25), which are located on the upper sides of the transmission wheel (21).

8. A material receiving and unloading machine, characterized in that: The device includes a second lifting drive mechanism (26), a material frame (27), and a conveying device as described in any one of claims 1 to 7. The material frame (27) is installed at the lifting end of the second lifting drive mechanism (26), and the conveying device is located on one side of the material frame (27). The material frame (27) is provided with a multi-layer material carrying structure from top to bottom. The material carrying structure includes a side slot (28) and a material trough (29) communicating with the top port of the side slot (28). The side slot (28) is used for inserting the translation plate (7) into the material frame (27).

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