Straw air dryer for manufacturing biomass fuel particles

Abstract

The utility model relates to the technical field of straw particles, in particular to a straw air dryer for manufacturing biomass fuel particles. Comprising a supporting frame and further comprises an air drying cylinder, a sealing cover is located in the supporting frame and below the air drying cylinder, connecting plates are symmetrically arranged outside the sealing cover, mounting blocks are fixedly connected to the upper surfaces of the two connecting plates, and fixing frames are symmetrically arranged outside the air drying cylinder. According to the straw air-drying device, a worker can conveniently open or close the sealing cover through the arranged fixing assembly, so that the worker can conveniently carry out feeding and discharging treatment on straw, the straw can be effectively stirred through the arranged stirring assembly, and the air-drying effect and efficiency of the straw can be further improved; and through the arranged screening assembly, impurities carried in the air-dried straw can be effectively screened and filtered, and therefore the quality of the air-dried straw is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of straw particles, and specifically, to a straw air dryer for manufacturing biomass fuel particles. Background Art

[0002] Straw, anciently called straw, also known as cereal straw, refers to the remaining stems and leaves after the mature threshing of gramineous crops such as rice, wheat, and corn. Among them, the straw of rice is often called rice straw, and the straw of wheat is called wheat straw. When air-drying straw, a straw air dryer for manufacturing biomass fuel particles is required.

[0003] After the existing air dryers air-dry straw, they cannot effectively screen and filter impurities such as small stones entrained in the straw. After the straw is air-dried, there are generally many impurities entrained inside the straw, and the existing air dryers cannot effectively filter and remove the impurities. This will result in a large amount of impurities still being entrained inside the straw after air-drying. At this time, workers need to use other screening devices to screen the straw, which not only increases the air-drying cost of the straw, but also reduces the air-drying efficiency of the straw. At the same time, it will also increase the workload of the workers. Moreover, the impurities will also cause unnecessary impacts on the subsequent processing operations of the straw.

[0004] Chinese Patent with Publication No. CN220229841U, the utility model relates to the comprehensive utilization of biomass pellet fuel, and discloses a dryer for biomass pellet fuel, including a base. The upper surface of the base is fixedly connected with a support plate. The outer surface of the support plate is fixedly connected with a fixed column. A first transmission shaft is rotatably connected between the inner walls of the fixed column. The left end of the first transmission shaft is fixedly connected with a pulley. One end of the fixed column away from the pulley is fixedly connected with a bevel gear. The outer surface of the bevel gear is meshed with a gear. By setting an opening and closing cover, the opening and closing cover can prevent the influence of the external environment, such as dust and water vapor, on the pellet fuel, which helps to ensure the quality of the pellet fuel and the stability of the drying process. The design of the opening and closing cover can help accurately control the flow rate of the pellet fuel, ensure a more stable and controllable production process, and facilitate the operator to quickly start or close the feeding port and the discharging port when needed.

[0005] The above solution can effectively air-dry the straw comprehensively, but after the above solution air-dries the straw, it still cannot effectively filter and remove the impurities entrained in the straw, and fails to solve the problems raised in the above background art.

[0006] Therefore, those skilled in the art provide a straw air dryer for manufacturing biomass fuel particles to solve the problems raised in the above background art. Summary of the Utility Model

[0007] The utility model aims to provide a straw air-drying machine for manufacturing biomass fuel particles, comprising a support frame and also comprising:

[0008] An air drying cylinder is located inside the support frame, a sealing cover is provided below the air drying cylinder, connecting plates are symmetrically provided outside the sealing cover, mounting blocks are fixedly connected to the upper surfaces of two connecting plates, and fixing frames are symmetrically provided outside the air drying cylinder, and guide grooves for the movement of mounting blocks are provided at the bottoms of the two fixing frames;

[0009] A fixing assembly is respectively arranged inside the two mounting blocks and is used to fix the mounting blocks to the fixing frame;

[0010] The hot air blowers are symmetrically arranged on the upper surface of the air drying cylinder, and the air outlet ends of the two hot air blowers are connected to the interior of the air drying cylinder through pipelines;

[0011] A stirring assembly is arranged on the upper surface of the air-drying cylinder and is used to stir the straw inside the air-drying cylinder;

[0012] A screening component is located below the air-drying cylinder and is used to screen the air-dried straw;

[0013] A positioning frame is fixedly connected to the upper surface of the support frame, and a collecting frame is arranged inside the positioning frame.

[0014] As a further improvement of the present technical solution, the fixing assembly includes inner plates respectively arranged inside the two mounting blocks, the front end surface and the rear end surface of the inner plate are fixedly connected with telescopic rods, the telescopic ends of the multiple telescopic rods are fixedly connected with insertion rods, the outsides of the multiple telescopic rods are sleeved with return springs, the multiple return springs are in contact between the insertion rods and the inner plates, and the front end surfaces and the rear end surfaces of the two mounting blocks and the fixed frame are provided with guide grooves for the movement of the insertion rods.

[0015] As a further improvement of the present technical solution, the stirring assembly includes a first motor fixedly connected to the upper surface of the air-drying drum, the output shaft of the first motor is fixedly connected to a driving rod through a coupling, a plurality of stirring rods are fixedly connected to the outside of the driving rod, and a positioning sleeve is rotatably connected to the upper surface of the sealing cover, and a movable groove for the driving rod to move is provided inside the positioning sleeve.

[0016] As a further improvement of the present technical solution, the screening assembly includes a plurality of connecting blocks fixedly connected to the inner wall of the support frame, a sliding rod is fixedly connected between every two of the connecting blocks, a moving block is provided on the outside of the plurality of sliding rods, a resistance spring is sleeved on the outside of the plurality of sliding rods, the resistance springs are in resistance between the moving block and the connecting block, a support plate is fixedly connected between the plurality of moving blocks, a screening frame is provided on the upper surface of the support plate, filtering holes are evenly spaced on the contact surface between the screening frame and the support plate, and a vibration motor is fixedly connected to the bottom of the support plate.

[0017] As a further improvement of the present technical solution, the upper surface of the support plate is symmetrically provided with a clamping plate, and both sides of the outer wall of the screening frame are fixedly connected with an inserting plate, and the opposite sides of the two clamping plates are provided with a guide groove for the inserting plate to move, and the upper surfaces of the two clamping plates are symmetrically provided with fixing plates, and the interior of the fixing plate is symmetrically provided with fixing rods, and the two ends of the fixing rods are respectively fixedly connected to the inner top and inner bottom of the fixing plate, and a movable plate is provided inside the fixing plate, and the interior of the movable plate is provided with a guide groove for the movement of the fixing rod, and the outsides of the multiple fixing rods are sleeved with connecting springs, and the multiple connecting springs are in contact between the movable plate and the fixed plate, and the upper surface of the movable plate is fixedly connected with a pull rod, and the tops of every two pull rods are fixedly connected with the pull plate, and the bottom of the movable plate is fixedly connected with a mounting rod, and the contact surfaces of the multiple fixing plates and the clamping plates are provided with guide grooves for the movement of the mounting rod, and the interiors of the two plug plates are provided with guide grooves for the movement of the mounting rod.

[0018] As a further improvement of the technical solution, a second motor is fixedly connected to the outside of the support frame, and rotating rods are symmetrically provided on the outside of the drying cylinder. The other ends of the two rotating rods are rotatably connected to the outside of the support frame, and the output shaft of the second motor is fixedly connected to the other end of one of the rotating rods through a coupling.

[0019] Compared with the prior art, the utility model has the following beneficial effects:

[0020] In the straw air-drying machine for manufacturing biomass fuel particles, by providing a fixing component, a stirring component and a screening component, when the straw needs to be air-dried, it is only necessary to rotate the air-drying cylinder first, and when the sealing cover is at the top, the sealing cover is opened by the fixing component, and then the straw to be air-dried is placed inside the air-drying cylinder, and then the sealing cover is closed and fixed by the fixing component. When the sealing cover is closed, the hot air blower starts to operate, and the hot air blower can be used to effectively air-dry the straw. During the process, the stirring component will also start running synchronously. At this time, the stirring component can effectively improve the air-drying efficiency and effect of the straw. When the straw is air-dried, you only need to rotate the sealing cover to the bottom first, and then open the sealing cover through the fixing component. When the sealing cover is opened, the air-dried straw will naturally fall onto the screening component. At this time, the screening component starts running. The screening component can effectively screen the straw, and the impurities in the straw will be screened into the collection frame for collection. At this time, the straw can be dried and removed, saving time and effort. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0022] Figure 2 It is a cutaway three-dimensional structural schematic diagram of the installation block in the utility model;

[0023] Figure 3 It is a three-dimensional structural schematic diagram of the positioning sleeve in the utility model;

[0024] Figure 4 It is a schematic diagram of the cutaway three-dimensional structure of the fixing plate in the utility model;

[0025] Figure 5 It is a three-dimensional structural schematic diagram of the vibration motor in the utility model;

[0026] Figure 6 for Figure 2 Schematic diagram of the enlarged structure of the A area in the middle;

[0027] Figure 7 for Figure 4 Schematic diagram of the enlarged structure of the middle B area;

[0028] Figure 8 for Figure 5 Schematic diagram of the enlarged structure of the C area in the middle.

[0029] The meaning of each number in the figure is:

[0030] 1. Support frame; 2. Air drying cylinder; 3. Sealing cover; 4. Hot air blower; 5. First motor; 6. Second motor; 7. Rotating rod; 8. Screening frame; 9. Filter hole; 10. Collecting frame; 11. Connecting plate; 12. Fixed frame; 13. Driving rod; 14. Stirring rod; 15. Positioning sleeve; 16. Mounting block; 17. Support plate; 18. Insert plate; 19. Snap-in plate; 20. Fixed plate; 21. Vibration motor; 22. Inner plate; 23. Telescopic rod; 24. Insert rod; 25. Reset spring; 26. Fixed rod; 27. Moving plate; 28. Connecting spring; 29. ​​Pull rod; 30. Mounting rod; 31. Connecting block; 32. Sliding rod; 33. Moving block; 34. Resisting spring; 35. Positioning frame. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] See also Figure 1 - Figure 8 As shown, this embodiment provides a straw air-drying machine for manufacturing biomass fuel particles, including a support frame 1, and also including:

[0033] The air drying cylinder 2 is located inside the support frame 1, and a sealing cover 3 is provided below the air drying cylinder 2. A connecting plate 11 is symmetrically provided outside the sealing cover 3. The upper surfaces of the two connecting plates 11 are fixedly connected with mounting blocks 16. The outside of the air drying cylinder 2 is symmetrically provided with fixing frames 12. The bottoms of the two fixing frames 12 are provided with guide grooves for the mounting blocks 16 to move.

[0034] The fixing components are respectively arranged inside the two mounting blocks 16 and used to fix the mounting blocks 16 and the fixing frame 12;

[0035] The hot air blowers 4 are symmetrically arranged on the upper surface of the air drying cylinder 2, and the air outlet ends of the two hot air blowers 4 are connected to the interior of the air drying cylinder 2 through pipes;

[0036] A stirring assembly is arranged on the upper surface of the air-drying cylinder 2 and is used to stir the straw inside the air-drying cylinder 2;

[0037] The screening component is located below the air-drying cylinder 2 and is used to screen the air-dried straw;

[0038] The positioning frame 35 is fixedly connected to the upper surface of the support frame 1 , and a collecting frame 10 is provided inside the positioning frame 35 .

[0039] The above working principle: when it is necessary to air-dry the straw, it is only necessary to rotate the air-drying cylinder 2 first. When the sealing cover 3 is at the top, the sealing cover 3 is opened by the fixing assembly. At this time, the straw to be air-dried is placed inside the air-drying cylinder 2, and the sealing cover 3 is closed and fixed by the fixing assembly. When the sealing cover 3 is closed, the hot air blower 4 starts to run. At this time, the hot air blower 4 can be used to effectively air-dry the straw. During the operation of the hot air blower 4, the stirring assembly will also start to run synchronously. At this time, the stirring assembly can effectively improve the air-drying efficiency and effect of the straw. When the straw is air-dried, it is only necessary to rotate the sealing cover 3 to the bottom first, and then open the sealing cover 3 by the fixing assembly. When the sealing cover 3 is opened, the air-dried straw will naturally fall onto the screening assembly. At this time, the screening assembly starts to run. The screening assembly can effectively screen the straw, and the impurities in the straw will be screened into the collecting frame 10 for collection. At this time, the air-drying and impurity removal of the straw can be completed, saving time and effort.

[0040] In order to effectively close and fix the sealing cover 3, the fixing assembly includes an inner plate 22 respectively arranged inside the two mounting blocks 16, the front end surface and the rear end surface of the inner plate 22 are fixedly connected with a telescopic rod 23, and the telescopic ends of the multiple telescopic rods 23 are fixedly connected with an insertion rod 24, and the outer parts of the multiple telescopic rods 23 are sleeved with a return spring 25, and the multiple return springs 25 are all in contact between the insertion rod 24 and the inner plate 22. The front end surface and the rear end surface of the two mounting blocks 16 and the fixing frame 12 are provided with a guide groove for the movement of the insertion rod 24. When the sealing cover 3 needs to be closed and fixed, it is only necessary to first adjust the insertion rod 24. 4 is pressed, at this time, the plug rod 24 will squeeze the telescopic rod 23 and the reset spring 25 synchronously, and then the mounting block 16 is inserted into the guide groove at the bottom of the fixed frame 12. At this time, the mounting block 16 will drive the plug rod 24 to move synchronously. When the mounting block 16 drives the plug rod 24 to move to the guide grooves on the front and rear surfaces of the fixed frame 12, the reset spring 25 is reset, driving the plug rod 24 to move synchronously. When the plug rod 24 is inserted into the guide grooves on the front and rear surfaces of the fixed frame 12, the mounting block 16 can be fixed to the fixed frame 12, and the closing cover can be closed and fixed at this time.

[0041] Taking into account that stirring the straw during air-drying can further improve the air-drying effect and efficiency of the straw, the stirring assembly includes a first motor 5 fixedly connected to the upper surface of the air-drying cylinder 2, the output shaft of the first motor 5 is fixedly connected to a driving rod 13 through a coupling, a plurality of stirring rods 14 are fixedly connected to the outside of the driving rod 13, a positioning sleeve 15 is rotatably connected to the upper surface of the sealing cover 3, and a movable groove for the driving rod 13 to move is provided inside the positioning sleeve 15. When the straw needs to be stirred, the first motor 5 starts to run, driving the driving rod 13 to rotate synchronously, and the driving rod 13 then drives the stirring rod 14 to rotate synchronously. At this time, the straw can be stirred by the stirring rod 14, thereby further improving the air-drying effect and efficiency of the straw.

[0042] In order to effectively screen the air-dried straw, so as to screen and filter the impurities entrained in the straw, the screening component includes a plurality of connecting blocks 31 fixedly connected to the inner wall of the support frame 1, a sliding rod 32 is fixedly connected between every two connecting blocks 31, a plurality of sliding rods 32 are provided with a moving block 33 on the outside, a plurality of sliding rods 32 are provided with a resistance spring 34 on the outside, a plurality of resistance springs 34 are in resistance between the moving block 33 and the connecting block 31, a support plate 17 is fixedly connected between the plurality of moving blocks 33, a screening frame 8 is provided on the upper surface of the support plate 17, and filter holes 9 are evenly spaced on the contact surface between the screening frame 8 and the support plate 17, a vibration motor 21 is fixedly connected to the bottom of the support plate 17, and when the straw is air-dried, the sealing cover is opened 3. At this time, the air-dried straw will naturally fall into the inside of the screening frame 8. When the straw completely falls into the inside of the screening frame 8, the vibration motor 21 starts to run, driving the support plate 17 to vibrate synchronously, and the support plate 17 drives the screening frame 8 to vibrate synchronously. At this time, the impurities entrained in the straw can be screened and filtered through the filter holes 9. During the vibration of the support plate 17, the moving block 33 will also be driven to move synchronously outside the slide bar 32. During the movement of the moving block 33, the resistance spring 34 will be squeezed. At this time, the resistance spring 34 can effectively buffer the vibration force, thereby effectively improving the stability of the support plate 17 and the screening frame 8 during vibration, and then effectively improving the screening effect of the screening component.

[0043] In order to effectively fix the screening frame 8 on the supporting plate 17, the upper surface of the supporting plate 17 is symmetrically provided with a clamping plate 19, both sides of the outer wall of the screening frame 8 are fixedly connected with plug plates 18, and the opposite sides of the two clamping plates 19 are provided with guide grooves for the plug plates 18 to move. The upper surfaces of the two clamping plates 19 are symmetrically provided with fixed plates 20, and the interior of the fixed plates 20 is symmetrically provided with fixing rods 26, and the two ends of the multiple fixing rods 26 are respectively fixedly connected to the internal top and internal bottom ends of the fixed plates 20. A movable plate 27 is provided inside the fixed plate 20, and the interior of the movable plate 27 is provided with a guide groove for the fixing rods 26 to move. The outsides of the multiple fixing rods 26 are sleeved with connecting springs 28, and the multiple connecting springs 28 are all in contact between the movable plate 27 and the fixed plate 20. The upper surface of the movable plate 27 is fixedly connected with a pull rod 29, and the tops of every two pull rods 29 are fixedly connected with a pull plate, and the bottom of the movable plate 27 is fixedly connected with a mounting rod 30, the contact surfaces of multiple fixed plates 20 and the clamping plates 19 are all provided with guide grooves for the movement of the mounting rods 30, and the interiors of the two plug plates 18 are all provided with guide grooves for the movement of the mounting rods 30. When it is necessary to fix the screening frame 8 on the supporting plate 17, it is only necessary to pull the pull plate first. At this time, the pull plate will drive the pull rod 29 to move synchronously, and the pull rod 29 will drive the movable plate 27 to move synchronously outside the fixed rod 26. During the movement of the movable plate 27, the connecting spring 28 will be squeezed. At this time, the plug plate 18 is plugged into the guide groove inside the clamping plate 19, and then the pull plate is released. At this time, the connecting spring 28 is reset, driving the movable plate 27 to move synchronously, and the movable plate 27 drives the mounting rod 30 to move synchronously. When the mounting rod 30 is plugged into the guide groove inside the plug plate 18, the plug plate 18 and the clamping plate 19 can be fixed, and the screening frame 8 can be fixed on the upper surface of the supporting plate 17.

[0044] In addition, in order to air-dry the straw more comprehensively, a second motor 6 is fixedly connected to the outside of the support frame 1, and a rotating rod 7 is symmetrically provided on the outside of the air-drying cylinder 2. The other ends of the two rotating rods 7 are rotatably connected to the outside of the support frame 1, and the output shaft of the second motor 6 is fixedly connected to the other end of one of the rotating rods 7 through a coupling. During the operation of the hot air blower 4, the second motor 6 will also start to run synchronously. At this time, the second motor 6 will drive the rotating rod 7 to rotate synchronously, and the rotating rod 7 will drive the air-drying cylinder 2 to rotate synchronously. At this time, the straw can be tumbled inside the air-drying cylinder 2, thereby further improving the air-drying effect and efficiency of the straw.

[0045] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A straw air-drying machine for producing biomass fuel particles, comprising a support frame (1), characterized in that: Also includes: The air drying cylinder (2) is located inside the support frame (1), a sealing cover (3) is provided below the air drying cylinder (2), connecting plates (11) are symmetrically provided outside the sealing cover (3), and the upper surfaces of the two connecting plates (11) are fixedly connected with mounting blocks (16), and the outside of the air drying cylinder (2) is symmetrically provided with fixing frames (12), and the bottoms of the two fixing frames (12) are provided with guide grooves for the movement of the mounting blocks (16); A fixing assembly, which is respectively arranged inside the two mounting blocks (16) and is used to fix the mounting blocks (16) and the fixing frame (12); A hot air blower (4) is symmetrically arranged on the upper surface of the air drying cylinder (2), and the air outlet ends of the two hot air blowers (4) are connected to the interior of the air drying cylinder (2) through a pipeline; A stirring assembly is arranged on the upper surface of the air-drying cylinder (2) and is used to stir the straw inside the air-drying cylinder (2); A screening component is located below the air-drying cylinder (2) and is used to screen the air-dried straw; A positioning frame (35) is fixedly connected to the upper surface of the support frame (1), and a collecting frame (10) is provided inside the positioning frame (35).

2. The straw air-drying machine for producing biomass fuel particles according to claim 1, characterized in that: The fixing assembly comprises inner plates (22) respectively arranged inside two mounting blocks (16); the front end surface and the rear end surface of the inner plate (22) are fixedly connected with telescopic rods (23); the telescopic ends of the plurality of telescopic rods (23) are fixedly connected with insertion rods (24); the exteriors of the plurality of telescopic rods (23) are sleeved with return springs (25); the plurality of return springs (25) are in contact between the insertion rods (24) and the inner plate (22); the front end surfaces and the rear end surfaces of the two mounting blocks (16) and the fixing frame (12) are provided with guide grooves for the movement of the insertion rods (24).

3. The straw air-drying machine for producing biomass fuel particles according to claim 1, characterized in that: The stirring assembly comprises a first motor (5) fixedly connected to the upper surface of the air-drying cylinder (2); the output shaft of the first motor (5) is fixedly connected to a driving rod (13) via a coupling; a plurality of stirring rods (14) are fixedly connected to the outside of the driving rod (13); a positioning sleeve (15) is rotatably connected to the upper surface of the sealing cover (3); a movable groove is provided inside the positioning sleeve (15) for the driving rod (13) to move.

4. The straw air-drying machine for producing biomass fuel particles according to claim 1, characterized in that: The screening assembly comprises a plurality of connecting blocks (31) fixedly connected to the inner wall of the support frame (1), a sliding rod (32) fixedly connected between every two of the connecting blocks (31), a moving block (33) provided outside the plurality of sliding rods (32), a resisting spring (34) sleeved outside the plurality of sliding rods (32), the resisting springs (34) resist between the moving block (33) and the connecting block (31), a supporting plate (17) fixedly connected between the plurality of moving blocks (33), a screening frame (8) provided on the upper surface of the supporting plate (17), filtering holes (9) uniformly spaced on the contact surface between the screening frame (8) and the supporting plate (17), and a vibration motor (21) fixedly connected to the bottom of the supporting plate (17).

5. The straw air-drying machine for producing biomass fuel particles according to claim 4, characterized in that: The upper surface of the support plate (17) is symmetrically provided with a clamping plate (19), both sides of the outer wall of the screening frame (8) are fixedly connected with an inserting plate (18), and the opposite sides of the two clamping plates (19) are provided with a guide groove for the inserting plate (18) to move. The upper surfaces of the two clamping plates (19) are symmetrically provided with a fixing plate (20), and the interior of the fixing plate (20) is symmetrically provided with a fixing rod (26), and the two ends of the fixing rod (26) are respectively fixedly connected to the internal top end and the internal bottom end of the fixing plate (20), and the interior of the fixing plate (20) is provided with a movable plate (27), and the interior of the movable plate (27) is provided with a fixing rod ( 26) movable guide grooves, the exteriors of the plurality of fixed rods (26) are sleeved with connecting springs (28), the plurality of connecting springs (28) are in contact between the movable plate (27) and the fixed plate (20), the upper surface of the movable plate (27) is fixedly connected with a pull rod (29), the top ends of every two pull rods (29) are fixedly connected with a pull plate, the bottom of the movable plate (27) is fixedly connected with a mounting rod (30), the contact surfaces of the plurality of fixed plates (20) and the clamping plate (19) are provided with guide grooves for the mounting rod (30) to move, and the interiors of the two plug plates (18) are provided with guide grooves for the mounting rod (30) to move.

6. The straw air-drying machine for producing biomass fuel particles according to claim 1, characterized in that: The outside of the support frame (1) is fixedly connected to a second motor (6), and the outside of the air-drying drum (2) is symmetrically provided with rotating rods (7), the other ends of the two rotating rods (7) are both rotatably connected to the outside of the support frame (1), and the output shaft of the second motor (6) is fixedly connected to the other end of one of the rotating rods (7) via a coupling.

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