A multi-stage telescopic conveyor belt

Abstract

The utility model relates to the technical field of grain conveying discloses a multistage telescopic conveying belt, including first support frame, second support frame and third support frame, the one end upside of first support frame is fixed with four first pulley, both sides of second support frame all are fixed with first sliding rod, two first sliding rods respectively move and pass through two first pulley, the other end downside of first support frame is fixed with four second pulley. The utility model discloses through the first support frame, second support frame and third support frame of setting, can solve the problem that the traditional conveying belt length is longer and is inconvenient to remove, and the storage occupies larger space, through the first hydraulic cylinder, second hydraulic cylinder, first hydraulic rod and second hydraulic rod of setting, can solve the problem that the traditional conveying belt cannot simultaneously adjust the height of conveying belt two ends, can conveniently catch the material of different height of this device, and further make this device more practical.

Description

Technical Field

[0001] This utility model relates to the field of grain conveying technology, and in particular to a multi-stage telescopic conveyor belt. Background Technology

[0002] After grains (including rice, corn, wheat, sesame, etc.) are purchased from outside, they need to be unloaded from trucks and transported to warehouses using conveyor belts. Subsequently, the grains need to be dried, then screened, and impurity removed. After drying, the grains are also transported using conveyor belts. Therefore, grains need to be transported in various processing steps, and grain conveyor belts play an indispensable role in the transfer of grains.

[0003] Existing conveyor belts have certain drawbacks in use. First, traditional conveyor belts are too long and inconvenient to move, and they also take up a lot of space when stored. Second, traditional conveyor belts cannot adjust the height of both ends of the conveyor belt at the same time. To address these issues, we propose a multi-stage telescopic conveyor belt. Utility Model Content

[0004] The main purpose of this utility model is to provide a multi-stage telescopic conveyor belt, which can effectively solve the problems of traditional conveyor belts being too long and inconvenient to move, and occupying a large amount of storage space. Secondly, traditional conveyor belts have the problem that the height of both ends of the conveyor belt cannot be adjusted at the same time.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A multi-stage telescopic conveyor belt includes a first support frame, a second support frame, and a third support frame. Four first pulleys are fixedly installed on the upper side of one end of the first support frame. First sliding rods are fixedly installed on both sides of the second support frame, with two of the first sliding rods movably passing through two of the first pulleys. Four second pulleys are fixedly installed on the lower side of the other end of the first support frame. Second sliding rods are fixedly installed on both sides of the third support frame, with two of the second sliding rods movably passing through two of the second pulleys. First rollers are movably inserted into both ends of the first support frame. A fourth roller is movably inserted into one end of the first support frame. Second rollers are movably inserted into both ends of the second support frame. A third roller is movably inserted into both ends of the third support frame. A fifth roller is movably inserted into one end of the third support frame. A conveyor belt is movably fitted onto the outer circumferential surfaces of the first, second, third, fourth, and fifth rollers.

[0006] Furthermore, the first support frame, the second support frame, and the third support frame are all trapezoidal frame structures, and the shape and size of the first support frame are larger than those of the second support frame and the third support frame. The four first pulleys are all "C" shaped structures, and the four first pulleys are respectively movably engaged with the outer circumferential surface of the two first sliding rods. The four second pulleys are all "C" shaped structures, and the four second pulleys are respectively movably engaged with the outer circumferential surface of the two second sliding rods.

[0007] Furthermore, a first gearbox is fixedly installed on one side of the first support frame, one end of the fourth roller shaft movably passes through the first gearbox, a first motor is fixedly installed on one side of the first gearbox, the first motor contains a first motor shaft, the first motor shaft movably passes through the first gearbox, the first gearbox contains a first gear set, and the first motor shaft is connected to the fourth roller shaft through the first gear set.

[0008] Furthermore, a second gearbox is fixedly installed at one end of the first support frame, a second motor is fixedly installed on one side of the second gearbox, the second motor contains a second motor shaft, the second motor shaft is movably inserted into the second gearbox, the second gearbox contains a second gear set, a first transmission shaft is movably inserted into the second gearbox, the second motor shaft is connected to the first transmission shaft through the second gear set, a first gear is fixedly inserted into one end of the first transmission shaft, and a first rack is fixedly installed on the lower side of the second support frame, the first gear and the first rack meshing together.

[0009] Furthermore, a third gearbox is fixedly installed on the lower side of one end of the first support frame, and a third motor is fixedly installed on one side of the third gearbox. The third motor contains a third motor shaft, which is movably inserted into the third gearbox. The third gearbox contains a third gear set, and a second transmission shaft is movably inserted into the third gearbox. The third motor shaft is connected to the second transmission shaft through the third gear set. A second gear is fixedly inserted into one end of the second transmission shaft, and a second rack is fixedly installed on the lower side of the third support frame. The second gear and the second rack are meshed together.

[0010] Furthermore, first connecting rods are fixedly installed at symmetrical positions on both sides of the first support frame. One end of each of the two first connecting rods is movably inserted into a first hydraulic rod. Each of the two first hydraulic rods is movably inserted into a first hydraulic cylinder. A frame is fixedly installed on the lower side of the two first hydraulic cylinders. Two third connecting rods are fixedly installed on the upper side of the frame. Each of the two third connecting rods is movably inserted into a second hydraulic cylinder. Each of the two second hydraulic cylinders is movably inserted into a second hydraulic rod. Each of the two second hydraulic rods is movably inserted into a second connecting rod. One end of each of the two second connecting rods is fixedly connected to the first support frame. The two second connecting rods are symmetrically arranged.

[0011] Furthermore, a hydraulic pump is fixedly installed on the upper side of the frame. The hydraulic pump is connected to two first hydraulic cylinders and two second hydraulic cylinders through hydraulic pipes. A control box is fixedly installed on the upper side of the frame. The control box is electrically connected to an external power supply and is electrically connected to a first motor, a second motor, a third motor, and the hydraulic pump. Movable wheels are installed on both sides of the frame, and two swivel wheels are fixedly installed on the lower side of the frame.

[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. This utility model, through the arrangement of a first support frame, a second support frame, and a third support frame, solves the problems of traditional conveyor belts being too long and inconvenient to move, and occupying a large storage space. By using four first pulleys and two first sliding rods, with the two first sliding rods respectively inserted into the two first pulleys and both first sliding rods fixedly connected to the second support frame, the first pulleys can fix the second support frame, allowing the second support frame to move only in one direction relative to the first support frame, thus enabling the second support frame to move above the first support frame. Similarly, by using four second pulleys and two second sliding rods, with the two second sliding rods respectively movably inserted into the two second pulleys and both second sliding rods fixedly connected to the third support frame, the second pulleys can fix the third support frame, allowing the third support frame to move only in one direction relative to the first support frame, thus enabling the third support frame to move below the first support frame. When the second support frame moves above the first support frame and the third support frame moves below the first support frame, the overall length of the conveyor belt can be reduced, thereby solving the problem of traditional conveyor belts occupying a large storage space.

[0013] 2. By using the first hydraulic cylinder, second hydraulic cylinder, first hydraulic rod, and second hydraulic rod, the problem of traditional conveyor belts being unable to simultaneously adjust the height of both ends of the conveyor belt can be solved. With the first hydraulic cylinder and first hydraulic rod extended from their respective cylinders, the two first hydraulic rods, through the two first connecting rods, can raise the horizontal height of one end of the first support frame. The adjustable horizontal height of one end of the first support frame allows the device to easily receive materials at different heights. Similarly, with the second hydraulic cylinder and second hydraulic rod extended from their respective cylinders, the two second hydraulic rods, through the two second connecting rods, can raise the horizontal height of the other end of the second support frame. The adjustable horizontal height of one end of the second support frame allows the device to easily transport materials to different heights, thus making the device more practical.

[0014] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of a multi-stage telescopic conveyor belt according to the present invention.

[0016] Figure 2 This is a schematic diagram of the other side of the overall structure of a multi-stage telescopic conveyor belt according to this utility model.

[0017] Figure 3 This is a schematic diagram of the lower side of the overall structure of a multi-stage telescopic conveyor belt according to this utility model.

[0018] Figure 4 This is a partial structural cross-sectional view of a multi-stage telescopic conveyor belt according to the present invention.

[0019] Figure 5 This is a schematic diagram of the extension of a multi-stage telescopic conveyor belt according to the present invention.

[0020] Figure 6 This utility model relates to a multi-stage telescopic conveyor belt. Figure 3 A magnified view of A in the middle.

[0021] Figure 7 This utility model relates to a multi-stage telescopic conveyor belt. Figure 3 A magnified view of B in the middle.

[0022] In the diagram: 1. First support frame; 2. Second support frame; 3. Third support frame; 4. First roller shaft; 5. Second roller shaft; 6. Third roller shaft; 7. Fourth roller shaft; 8. Fifth roller shaft; 9. Conveyor belt; 10. First gearbox; 11. Second gearbox; 12. Third gearbox; 13. First motor; 14. Second motor; 15. Third motor; 16. First drive shaft; 17. Second drive shaft; 18. First gear; 19. Second gear; 20. First rack; 21. Second rack; 22. First pulley; 23. Second pulley; 24. First slide rod; 25. Second slide rod; 26. Frame; 27. First hydraulic cylinder; 28. Second hydraulic cylinder; 29. ​​First hydraulic rod; 30. Second hydraulic rod; 31. First connecting rod; 32. Second connecting rod; 33. Third connecting rod; 34. Movable wheel; 35. Universal wheel; 36. Control box; 37. Hydraulic pump. Detailed Implementation

[0023] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0024] like Figures 1-6 As shown, this utility model provides a multi-stage telescopic conveyor belt, including a first support frame 1, a second support frame 2, and a third support frame 3. Four first pulleys 22 are fixedly installed on the upper side of one end of the first support frame 1. First sliding rods 24 are fixedly installed on both sides of the second support frame 2, with each sliding rod 24 movably passing through one of the first pulleys 22. Four second pulleys 23 are fixedly installed on the lower side of the other end of the first support frame 1. Second sliding rods 25 are fixedly installed on both sides of the third support frame 3, with each second sliding rod 25 movably passing through one of the first pulleys 22. Rod 25 moves through two second pulleys 23 respectively. First roller shafts 4 are movably inserted at both ends of the first support frame 1. Fourth roller shaft 7 is movably inserted at one end of the first support frame 1. Second roller shafts 5 are movably inserted at both ends of the second support frame 2. Third roller shafts 6 are movably inserted at both ends of the third support frame 3. Fifth roller shaft 8 is movably inserted at one end of the third support frame 3. Conveyor belts 9 are movably sleeved on the outer circumference of the first roller shaft 4, second roller shaft 5, third roller shaft 6, fourth roller shaft 7 and fifth roller shaft 8.

[0025] As an embodiment of this utility model, the first support frame 1, the second support frame 2 and the third support frame 3 can solve the problems of traditional conveyor belts being too long and inconvenient to move, and occupying a large storage space.

[0026] The first support frame 1, the second support frame 2, and the third support frame 3 are all trapezoidal frame structures, and the shape and size of the first support frame 1 are larger than those of the second support frame 2 and the third support frame 3. The four first pulleys 22 are all "C" shaped structures, and the four first pulleys 22 are respectively movably engaged with the outer circumferential surface of the two first slide rods 24. The four second pulleys 23 are all "C" shaped structures, and the four second pulleys 23 are respectively movably engaged with the outer circumferential surface of the two second slide rods 25.

[0027] Furthermore, by setting four first pulleys 22 and two first sliding rods 24, since the two first sliding rods are respectively inserted into the two first pulleys 22, and both first sliding rods 24 are fixedly connected to the second support frame 2, the first pulleys 22 can fix the second support frame 2, and make the second support frame 2 move only in one direction relative to the first support frame 1, thereby enabling the second support frame to move above the first support frame. By setting four second pulleys and two second sliding rods, since the two second sliding rods are respectively movably inserted into the two second pulleys, and both second sliding rods 25 are fixedly connected to the third support frame 3, the second pulleys 23 can fix the third support frame 3, and make the third support frame 3 move only in one direction relative to the first support frame 1, thereby enabling the third support frame to move below the first support frame. When the second support frame moves above the first support frame and the third support frame moves below the first support frame, the overall length of the conveyor belt can be reduced, thereby solving the problem of traditional conveyor belts occupying a large space when stored.

[0028] A first gearbox 10 is fixedly installed on one side of the first support frame 1. One end of the fourth roller shaft 7 is movably inserted through the first gearbox 10. A first motor 13 is fixedly installed on one side of the first gearbox 10. The first motor 13 contains a first motor shaft, which movably inserts through the first gearbox 10. The first gearbox 10 contains a first gear set, and the first motor shaft is connected to the fourth roller shaft 7 through the first gear set.

[0029] A second gearbox 11 is fixedly installed at one end of the first support frame 1. A second motor 14 is fixedly installed on one side of the second gearbox 11. The second motor 14 contains a second motor shaft, which is movably inserted into the second gearbox 11. The second gearbox 11 contains a second gear set. A first transmission shaft 16 is movably inserted into the second gearbox 11. The second motor shaft is connected to the first transmission shaft 16 through the second gear set. A first gear 18 is fixedly inserted into one end of the first transmission shaft 16. A first rack 20 is fixedly installed on the lower side of the second support frame 2. The first gear 18 meshes with the first rack 20.

[0030] A third gearbox 12 is fixedly installed on the lower side of one end of the first support frame 1. A third motor 15 is fixedly installed on one side of the third gearbox 12. The third motor 15 contains a third motor shaft, which is movably inserted into the third gearbox 12. The third gearbox 12 contains a third gear set. A second transmission shaft 17 is movably inserted into the third gearbox 12. The third motor shaft is connected to the second transmission shaft 17 through the third gear set. A second gear 19 is fixedly inserted into one end of the second transmission shaft 17. A second rack 21 is fixedly installed on the lower side of the third support frame 3. The second gear 19 meshes with the second rack 21.

[0031] First connecting rods 31 are fixedly installed at symmetrical positions on both sides of the first support frame 1. One end of each of the two first connecting rods 31 is movably inserted into a first hydraulic rod 29. Each of the two first hydraulic rods 29 is movably inserted into a first hydraulic cylinder 27. A frame 26 is fixedly installed on the lower side of the two first hydraulic cylinders 27. Two third connecting rods 33 are fixedly installed on the upper side of the frame 26. Each of the two third connecting rods 33 is movably inserted into a second hydraulic cylinder 28. Each of the two second hydraulic cylinders 28 is movably inserted into a second hydraulic rod 30. Each of the two second hydraulic rods 30 is movably inserted into a second connecting rod 32. One end of each of the two second connecting rods 32 is fixedly connected to the first support frame 1. The two second connecting rods 32 are symmetrically arranged.

[0032] Specifically, the first hydraulic cylinder 27, the second hydraulic cylinder 28, the first hydraulic rod 29, and the second hydraulic rod 30 solve the problem that traditional conveyor belts cannot simultaneously adjust the height of both ends. When the two first hydraulic rods 29 extend from the two first hydraulic cylinders 27, they raise the horizontal height of one end of the first support frame 1 via two first connecting rods 31. This adjustable horizontal height allows the device to easily receive materials at different heights. Similarly, when the two second hydraulic rods 32 extend from the two second hydraulic cylinders 28, they raise the horizontal height of the other end of the second support frame 2 via two second connecting rods 33. This adjustable horizontal height allows the device to easily transport materials to different heights, thus making the device more practical.

[0033] A hydraulic pump 37 is fixedly installed on the upper side of the frame 26. The hydraulic pump 37 is connected to two first hydraulic cylinders 27 and two second hydraulic cylinders 28 through hydraulic pipes. A control box 36 is fixedly installed on the upper side of the frame 26. The control box 36 is electrically connected to an external power supply. The control box 36 is electrically connected to the first motor 13, the second motor 14, the third motor 15 and the hydraulic pump 37. Movable wheels 34 are installed on both sides of the frame 26. Two universal wheels 35 are fixedly installed on the lower side of the frame 26.

[0034] It should be noted that the conveyor belt 9 is fitted onto the two second rollers 5. Then, the conveyor belt 9 passes from the upper side of the fourth roller 7 to the lower side of the fourth rotating shaft 7. Then, the conveyor belt 9 passes over the upper side of one of the two first rollers 4. This arrangement allows the second support frame 2 to move relative to the first support frame 1 without changing the original length of the conveyor belt 9. Then, the conveyor belt 9 passes over the two first rollers 4 to the upper side of the other fifth roller 8. Then, the conveyor belt 9 passes from the upper side of the fifth roller 8 to the lower side of the fifth rotating shaft 8. Then, the conveyor belt 9 passes over the upper side of one of the two third rollers 6. Then, the conveyor belt 9 passes over the other of the two third rollers 6. This arrangement allows the third support frame 3 to move relative to the first support frame 1 without changing the original length of the conveyor belt 9. Then, the conveyor belt 6 is connected end to end.

[0035] Working principle: First, place the device in its retracted state on a horizontal surface. Then, electrically connect the control box 36 to an external power source. The user can move the device using the two movable wheels 34 and the two omnidirectional wheels 35. Once the user has moved the device to a suitable position, the user can then power the hydraulic pump 37 through the control box 36. This causes the hydraulic pump 37 to pump hydraulic oil through hydraulic pipes into the two first hydraulic cylinders 30. The hydraulic oil entering the two first hydraulic cylinders 30 can extend the two first hydraulic rods 29 out of the two first hydraulic cylinders 27, respectively. The two first hydraulic rods 29 are connected to the two first connecting rods 31. This raises the horizontal height of one end of the first support frame 1. Then, the user can power the hydraulic pump 37 through the control box 36, so that the hydraulic pump 37 sends hydraulic oil through the hydraulic pipe into the two second hydraulic cylinders 31. The hydraulic oil entering the two second hydraulic cylinders 31 can extend the two second hydraulic rods 32 out of the two second hydraulic cylinders 28 respectively. The two second hydraulic rods 30 raise the horizontal height of the other end of the second support frame 2 through the two second connecting rods 33 respectively. During the process of raising the horizontal height of the other end of the second support frame 2, the two second hydraulic rods 28 will rotate about the two third connecting rods 33 as axes respectively. Next, the user can power the second motor 14 via the control box 36. Powering the second motor 14 causes its shaft to rotate. Since the second motor shaft is connected to the first transmission shaft 16 via a second gear set, the rotation of the second motor shaft drives the first transmission shaft 16 to rotate. The rotation of the first transmission shaft 16 drives the first gear 18 to rotate. Since the first gear 18 meshes with the first rack 20, its rotation causes the first rack 20 to move. The first rack 20 then drives the second support frame 2 to move towards one end of the first support frame 1. Because the first pulley 22 has two first sliding rods 24 inserted into it, and both first sliding rods 24 are fixedly connected to the second support frame 2, the first pulley 22 can fix the second support frame 2, allowing it to move only in one direction relative to the first support frame 1. Once the second support frame 2 has moved to the desired position, the user can de-energize the second motor 15 via the control box 36. Next, the user can power the third motor 15 through the control box 36. Powering the third motor 15 causes the third motor shaft to rotate. Since the third motor shaft is connected to the second transmission shaft 17 through the third gear set, the rotation of the third motor shaft can drive the second transmission shaft 17 to rotate. The rotation of the second transmission shaft 17 can drive the second gear 19 to rotate. Since the second gear 19 is meshed with the second rack 21, the rotation of the second gear 19 can cause the second rack 21 to move. Then, the second rack 21 drives the third support frame 3 to move towards the other end of the first support frame 1. Since the second pulley 23 is inserted through two second slide rods 25 respectively, and both second slide rods 25 are fixedly connected to the third support frame 3, the second pulley 23 can fix the third support frame 3 and make the third support frame 3 move only in one direction relative to the first support frame 1. When the third support frame 3 has moved to the appropriate position, the user can stop powering the third motor 16 through the control box 36.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A multi-stage telescopic conveyor belt, comprising a first support frame (1), a second support frame (2), and a third support frame (3), characterized in that: Four first pulleys (22) are fixedly installed on the upper side of one end of the first support frame (1). First sliding rods (24) are fixedly installed on both sides of the second support frame (2). Two first sliding rods (24) respectively movably pass through two first pulleys (22). Four second pulleys (23) are fixedly installed on the lower side of the other end of the first support frame (1). Second sliding rods (25) are fixedly installed on both sides of the third support frame (3). Two second sliding rods (25) respectively movably pass through two second pulleys (23). (1) Both ends of the first support frame (1) are movably connected to the first roller shaft (4), one end of the first support frame (1) is movably connected to the fourth roller shaft (7), both ends of the second support frame (2) are movably connected to the second roller shaft (5), both ends of the third support frame (3) are movably connected to the third roller shaft (6), one end of the third support frame (3) is movably connected to the fifth roller shaft (8), and the outer circumferential surfaces of the first roller shaft (4), second roller shaft (5), third roller shaft (6), fourth roller shaft (7) and fifth roller shaft (8) are movably fitted with conveyor belts (9).

2. The multi-stage telescopic conveyor belt according to claim 1, characterized in that: The first support frame (1), the second support frame (2) and the third support frame (3) are all trapezoidal frame structures, and the shape and size of the first support frame (1) are larger than those of the second support frame (2) and the shape and size of the first support frame (1) are larger than those of the third support frame (3). The four first pulleys (22) are all "C" shaped structures, and the four first pulleys (22) are respectively movably engaged on the outer circumferential surface of the two first sliding rods (24). The four second pulleys (23) are all "C" shaped structures, and the four second pulleys (23) are respectively movably engaged on the outer circumferential surface of the two second sliding rods (25).

3. A multi-stage telescopic conveyor belt according to claim 1, characterized in that: A first gearbox (10) is fixedly installed on one side of the first support frame (1). One end of the fourth roller shaft (7) passes through the first gearbox (10). A first motor (13) is fixedly installed on one side of the first gearbox (10). The first motor (13) contains a first motor shaft. The first motor shaft passes through the first gearbox (10). The first gearbox (10) contains a first gear set. The first motor shaft is connected to the fourth roller shaft (7) through the first gear set.

4. A multi-stage telescopic conveyor belt according to claim 1, characterized in that: A second gearbox (11) is fixedly installed at one end of the first support frame (1). A second motor (14) is fixedly installed on one side of the second gearbox (11). The second motor (14) contains a second motor shaft. The second motor shaft is movably inserted into the second gearbox (11). The second gearbox (11) contains a second gear set. A first transmission shaft (16) is movably inserted into the second gearbox (11). The second motor shaft is connected to the first transmission shaft (16) through the second gear set. A first gear (18) is fixedly inserted into one end of the first transmission shaft (16). A first rack (20) is fixedly installed on the lower side of the second support frame (2). The first gear (18) meshes with the first rack (20).

5. A multi-stage telescopic conveyor belt according to claim 1, characterized in that: A third gearbox (12) is fixedly installed on the lower side of one end of the first support frame (1). A third motor (15) is fixedly installed on one side of the third gearbox (12). The third motor (15) contains a third motor shaft. The third motor shaft is movably inserted into the third gearbox (12). The third gearbox (12) contains a third gear set. A second transmission shaft (17) is movably inserted into the third gearbox (12). The third motor shaft is connected to the second transmission shaft (17) through the third gear set. A second gear (19) is fixedly inserted into one end of the second transmission shaft (17). A second rack (21) is fixedly installed on the lower side of the third support frame (3). The second gear (19) meshes with the second rack (21).

6. A multi-stage telescopic conveyor belt according to claim 1, characterized in that: First connecting rods (31) are fixedly installed on both sides of the first support frame (1). One end of each of the two first connecting rods (31) is movably connected to a first hydraulic rod (29). One hydraulic cylinder (27) is movably connected to each of the two first hydraulic rods (29). A frame (26) is fixedly installed on the lower side of the two first hydraulic cylinders (27). Two third connecting rods (33) are fixedly installed on the upper side of the frame (26). Two second hydraulic cylinders (28) are movably connected to each of the two third connecting rods (33). Two second hydraulic rods (30) are movably connected to each of the two second hydraulic rods (30). Two second connecting rods (32) are movably connected to each of the two second connecting rods (32). One end of each of the two second connecting rods (32) is fixedly connected to the first support frame (1). The two second connecting rods (32) are symmetrically arranged.

7. A multi-stage telescopic conveyor belt according to claim 6, characterized in that: A hydraulic pump (37) is fixedly installed on the upper side of the frame (26). The hydraulic pump (37) is connected to two first hydraulic cylinders (27) and two second hydraulic cylinders (28) through hydraulic pipes. A control box (36) is fixedly installed on the upper side of the frame (26). The control box (36) is electrically connected to an external power supply. The control box (36) is electrically connected to a first motor (13), a second motor (14), a third motor (15), and a hydraulic pump (37). Movable wheels (34) are installed on both sides of the frame (26). Two universal wheels (35) are fixedly installed on the lower side of the frame (26).

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