A cotton cleaning machine

Abstract

The utility model relates to cotton cleaning machine technical field, especially a kind of impurity cotton cleaning machine. The kind of impurity cotton cleaning machine includes: bottom plate, conveying component, patting chamber, first drive component, first filter plate, second drive component, second filter plate, discharge hole, the top left side of bottom plate is fixedly connected with support frame, the top of support frame is fixedly connected with conveying pipe, the top of conveying pipe is fixedly connected with inlet pipe, the top left side of bottom plate is installed with auger motor in support frame, the top right side of bottom plate is fixedly connected with box, the top left side of box is fixedly connected with inlet column, conveying cavity is set in the inside of conveying pipe, conveying cavity's inner wall is installed with conveying component. The utility model improves overall processing efficiency, avoids the problem of impurity processing lag caused by no pretreatment, effectively patting separation for hard block impurities, reduces the abrasion of hard impurities to subsequent components, solves the problem of incomplete impurity separation of traditional equipment and heavy burden of downstream process.

Description

Technical Field

[0001] This utility model relates to the field of cotton cleaning machine technology, and in particular to a cotton cleaning machine for removing impurities. Background Technology

[0002] The cotton cleaning machine is a key piece of equipment in the cotton processing. Through high-speed rotating components such as licker-in rollers and saw teeth, combined with airflow adsorption and vibrating screening technology, it can efficiently separate impurities such as cotton seeds, branches, leaves, and dust from cotton, while combing the fluffy cotton fibers to ensure the cleanliness and quality of the cotton, laying a good foundation for subsequent spinning, weaving and other processes.

[0003] Most cotton cleaning machines typically use conveyor belts to transport materials directly during feeding, providing only displacement without pre-treatment capabilities. This increases the load on the subsequent saw blades, and the single-blade impact relies heavily on centrifugal force and gravity to separate impurities. These impurities then enter the main processing stage directly with the cotton. This causes hard blocks such as dry mud and stones to come into contact with the saw blades, increasing wear and tear, reducing their lifespan, and limiting their effectiveness in removing cotton seeds, thus increasing the cleaning burden on downstream processes.

[0004] Therefore, it is necessary to provide a new cotton cleaning and cleaning machine to solve the above-mentioned technical problems. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a cotton cleaning and impurity removal machine.

[0006] This utility model provides a cotton cleaning and impurity removal machine, comprising: a base plate, a conveying assembly, a beating chamber, a first transmission assembly, a first filter plate, a second transmission assembly, a second filter plate, and a discharge hole. A support frame is fixedly connected to the top left of the base plate, a conveying pipe is fixedly connected to the top of the support frame, and an inlet pipe is fixedly connected to the top of the conveying pipe. An auger motor is installed on the top left of the support frame. A housing is fixedly connected to the top right of the base plate, and an inlet column is fixedly connected to the top left of the housing. A conveying chamber is formed inside the conveying pipe, and a conveying assembly is installed on the inner wall of the conveying chamber. A beating chamber is formed on the left inside the housing, and an opening chamber is formed on the right inside the housing. A conveying pipe is formed between the beating chamber and the opening chamber inside the housing. Two beating rollers are rotatably connected inside the beating chamber, and multiple beating blades are fixedly connected to the outside of the beating rollers. The first transmission assembly is installed on the inner wall of the beating rollers. A first filter plate is slidably connected to the bottom of the striking blade on the inner wall. Multiple connecting sleeves are rotatably connected to the inner wall of the loosening chamber. Multiple bayonets are fixedly connected to the outside of the connecting sleeves. A second transmission assembly is installed on the inner wall of the connecting sleeves. A second filter plate is slidably connected to the bottom of the bayonets on the inner wall of the loosening chamber. A vibrating motor is fixedly connected to the bottom of both filter plates. A storage box is slidably connected to the bottom of the first and second filter plates inside the box. A support rod is fixedly connected to the rear top of the bottom plate. A drive motor is fixedly connected to the top of the support rod. A discharge hole is opened on the right side of the box. A conveying roller is rotatably connected to the bottom of the inner wall of the discharge hole. A rotating motor is fixedly connected to the rear side of the box at the position corresponding to the discharge hole. A pressure roller is movably connected to the top of the inner wall of the discharge hole. Sliding chambers are opened on both sides of the inner wall of the discharge hole. A fixed rod is fixedly connected to the inside of the sliding chamber. A sliding block is slidably connected to the inner wall of the sliding chamber. A spring is sleeved on the outside of the fixed rod.

[0007] Preferably, the conveying assembly includes multiple blades, the outer walls of the multiple blades are fixedly connected to the inner wall of the conveying chamber, and the inner wall of the conveying chamber is rotatably connected to an auger rod.

[0008] Preferably, the first transmission assembly includes a first rotating rod, the outer side of which is fixedly connected to the inner wall of the beater roller, a first rotating wheel is fixedly connected to the rear end of the first rotating rod, and a first pulley is sleeved on the outer side of the two first rotating wheels.

[0009] Preferably, the second transmission assembly includes a second rotating rod, the outer side of which is fixedly connected to the inner wall of the connecting sleeve, a second rotating wheel is fixedly connected to the rear end of the second rotating rod, and a second pulley is sleeved on the outer side of a plurality of second rotating wheels.

[0010] Preferably, one end of the conveying pipe is fixedly connected to the outside of the auger motor, the end of the conveying pipe away from the auger motor is fixedly connected to the top of the feed column, the drive end of the rotating motor is fixedly connected to the rear side of the conveying roller, the inner wall of the sliding block is slidably connected to the outer wall of the fixed rod, the bottom end of the spring is fixedly connected to the top of the sliding block, the top end of the spring is fixedly connected to the top of the inner wall of the sliding chamber, the adjacent side of the two sliding blocks is rotatably connected to the end axis of the pressure roller, and the outside of the pressure roller is in contact with the outside of the conveying roller.

[0011] Preferably, the multiple blades are positioned at the intervals between the blades of the auger rod, and one end of the auger rod is fixedly connected to the drive end of the auger motor.

[0012] Preferably, the end of the first rotating rod is rotatably connected to the inner wall of the striking chamber, the front sides of the two first rotating wheels are rotatably connected to the rear side of the box, and the rear end of one of the first rotating wheels is fixedly connected to the driving end of one of the drive motors.

[0013] Preferably, the end of the second rotating rod is rotatably connected to the inner wall of the opening chamber, the front sides of the plurality of second rotating wheels are rotatably connected to the rear side of the housing, and the rear end of one of the second rotating wheels is fixedly connected to the drive end of another drive motor.

[0014] Compared with related technologies, the cotton cleaning and impurity removal machine provided by this utility model has the following beneficial effects:

[0015] More efficient pretreatment: This utility model uses a combination of auger rod and blades to simultaneously complete the initial cutting and breaking up of cotton while it is being conveyed, thereby breaking up cotton clumps, reducing the load on subsequent beating and loosening processes, improving overall processing efficiency, and avoiding the problem of delayed impurity treatment caused by the lack of pretreatment in traditional equipment.

[0016] More precise impurity separation: In the beating chamber of this utility model, the beating roller and beating blade, together with the first filter plate and the vibrating motor, effectively beat and separate hard impurities, reducing the wear of hard impurities on subsequent components; the loosening chamber uses the barbs to tear and loosen, and together with the second filter plate and the vibrating motor, further separates fine impurities such as cotton seeds. The dual impurity removal ensures the cleanliness of cotton and solves the problems of incomplete impurity separation and heavy burden on downstream processes in traditional equipment.

[0017] More stable discharge control: The pressure roller at the discharge hole of this utility model achieves adaptive adjustment through sliding block and spring, and works with the conveyor roller to squeeze out the material, preventing cotton seeds from being discharged along with the cotton. Attached Figure Description

[0018] Figure 1 A schematic diagram of the structure of a cotton cleaning and impurity removal machine provided by this utility model;

[0019] Figure 2 for Figure 1 The diagram shows the structure of the box.

[0020] Figure 3 for Figure 1 The diagram shows the structure of the delivery pipe.

[0021] Figure 4 for Figure 2 Enlarged view of point A in the image;

[0022] Figure 5 for Figure 2 Enlarged view of point B in the image.

[0023] Labels in the diagram: 1. Base plate; 2. Support frame; 3. Conveying pipe; 4. Feed pipe; 5. Screw motor; 6. Box body; 7. Feed column; 8. Conveying chamber; 9. Blade; 10. Screw rod; 11. Beating chamber; 12. Opening chamber; 13. Conveying pipe; 14. Beating roller; 15. Beating blade; 16. First rotating rod; 17. First rotating wheel; 18. First pulley; 19. First filter plate; 20. Connecting sleeve; 21. Bayonet; 22. Second rotating rod; 23. Second rotating wheel; 24. Second pulley; 25. Second filter plate; 26. Storage box; 27. Support rod; 28. Drive motor; 29. ​​Discharge hole; 30. Conveying roller; 31. Rotating motor; 32. Pressure roller; 33. Fixed rod; 34. Sliding block; 35. Spring. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0025] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0026] Please see Figures 1 to 5A cotton cleaning and cleaning machine includes: a base plate 1, which serves as the basic support component of the entire equipment. A support frame 2 is securely connected to the top left side of the base plate 1 via a stable connection. The support frame 2 supports a conveying pipe 3, ensuring the conveying pipe 3 maintains a stable position during operation. The conveying pipe 3 is fixedly connected to the top of the support frame 2, and is used for conveying cotton. An inlet pipe 4 is fixedly connected to the top of the support frame 2, facilitating the input of cotton raw materials. An auger motor 5 is installed on the top of the base plate 1, to the left of the support frame 2. The machine 5 provides power for the cotton conveying. One end of the conveying pipe 3 is fixedly connected to the outside of the auger motor 5 to ensure effective power transmission. The top right side of the bottom plate 1 is fixedly connected to the box 6, which is the main space for cotton to beating, loosening and other impurity removal operations. The top left side of the box 6 is fixedly connected to the feed column 7. The end of the conveying pipe 3 away from the auger motor 5 is fixedly connected to the top of the feed column 7, so that the cotton conveyed by the conveying pipe 3 can smoothly enter the box 6. The inside of the conveying pipe 3 is provided with a conveying chamber 8, which provides a channel for the cotton to be conveyed in the conveying pipe 3.

[0027] The conveying assembly is installed on the inner wall of the conveying chamber 8. The conveying assembly includes multiple blades 9 evenly distributed. The outer walls of the blades 9 are fixedly connected to the inner wall of the conveying chamber 8 to ensure that the blades 9 do not shift during operation. An auger rod 10 is rotatably connected to the inner wall of the conveying chamber 8. The rotation of the auger rod 10 pushes the cotton within the conveying chamber 8. The multiple blades 9 are positioned at the intervals between the blades of the auger rod 10. This arrangement allows the blades 9 to cut and break up the cotton while the auger rod 10 rotates and pushes it. One end of the auger rod 10 is fixedly connected to the drive end of the auger motor 5, enabling the auger motor 5 to drive the auger... The rotating rod 10 activates the beating chamber 11. The beating chamber 11 is located on the left side of the box body 6, used for initial beating and impurity removal of cotton. The opening chamber 12 is located on the right side of the box body 6, for further opening and impurity removal of cotton. A conveying pipe 13 is located between the beating chamber 11 and the opening chamber 12 inside the box body 6, facilitating the transport of cotton processed by the beating chamber 11 to the opening chamber 12. Two beating rollers 14 are rotatably connected inside the beating chamber 11. The beating rollers 14 can rotate inside the chamber. Multiple beating blades 15 are fixedly connected to the outside of the beating rollers 14, and the beating blades 15 beat the cotton as the beating rollers 14 rotate.

[0028] The first transmission assembly is installed on the inner wall of the beating roller 14. The first transmission assembly includes a first rotating rod 16, the end of which is rotatably connected to the inner wall of the beating chamber 11, allowing the first rotating rod 16 to rotate within the chamber. The outer side of the first rotating rod 16 is fixedly connected to the inner wall of the beating roller 14, transmitting rotation to the beating roller 14. The rear end of the first rotating rod 16 is fixedly connected to two first rotating wheels 17. The front sides of the two first rotating wheels 17 are rotatably connected to the rear side of the housing 6, ensuring stable rotation of the first rotating wheels 17. A first pulley 18 is sleeved on the outside of the rotating wheel 17, and the two first rotating wheels 17 are linked by the first pulley 18. The first filter plate 19 is slidably connected to the inner wall of the beating chamber 11 at the bottom end of the beating blade 15. After the cotton is beating in the beating chamber 11, impurities can fall through the first filter plate 19. Multiple connecting sleeves 20 are rotatably connected to the inner wall of the loosening chamber 12. The connecting sleeves 20 can rotate in the chamber. Multiple bayonets 21 are fixedly connected to the outside of the connecting sleeves 20. The bayonets 21 tear and loosen the cotton as the connecting sleeves 20 rotate.

[0029] The second transmission assembly is installed on the inner wall of the connecting sleeve 20. The second transmission assembly includes a second rotating rod 22, the end of which is rotatably connected to the inner wall of the opening chamber 12, allowing the second rotating rod 22 to rotate within the chamber. The outer side of the second rotating rod 22 is fixedly connected to the inner wall of the connecting sleeve 20, transmitting rotation to the connecting sleeve 20. A second rotating wheel 23 is fixedly connected to the rear end of the second rotating rod 22. The front sides of multiple second rotating wheels 23 are rotatably connected to the rear side of the housing 6, ensuring stable rotation of the second rotating wheels 23. A second pulley 24 is sleeved on the outer side of the multiple second rotating wheels 23, enabling linkage between the multiple second rotating wheels 23. The second filter plate 25 has a vibrating motor fixedly connected to the bottom end of both the first filter plate 19 and the second filter plate 25. The vibrating motor can assist in the operation of... The material passes through the filter plate. The inner wall of the loosening chamber 12 is slidably connected to the bottom end of the bayonet 21 with a second filter plate 25, which is used to filter impurities in the loosening chamber 12. Inside the box 6, a storage box 26 is slidably connected to the bottom ends of the first filter plate 19 and the second filter plate 25. Fallen impurities can be collected in the storage box 26. A support rod 27 is fixedly connected to the rear top of the bottom plate 1. The support rod 27 supports the drive motor 28. The top end of the support rod 27 is fixedly connected to the drive motor 28. The rear end of one of the first rotating wheels 17 is fixedly connected to the drive end of one of the drive motors 28. This drive motor 28 provides power to the first transmission component. The rear end of one of the second rotating wheels 23 is fixedly connected to the drive end of another drive motor 28. This drive motor 28 provides power to the second transmission component.

[0030] A discharge hole 29 is provided on the right side of the housing 6, serving as a channel for cotton discharge. A conveyor roller 30 is rotatably connected to the bottom of the inner wall of the discharge hole 29. The conveyor roller 30 rotates to transport cotton. A rotary motor 31 is fixedly connected to the rear side of the housing 6 at a position corresponding to the discharge hole 29. The rotary motor 31 provides rotational power to the conveyor roller 30. The drive end of the rotary motor 31 is fixedly connected to the rear side of the conveyor roller 30 to ensure power transmission. A pressure roller 32 is movably connected to the top of the inner wall of the discharge hole 29. The pressure roller 32 can move up and down, and its outer side contacts the outer side of the conveyor roller 30, working together with the conveyor roller 30 to squeeze and transport cotton. Sliding chambers are provided on both sides of the inner wall of the discharge hole 29 to provide sliding space for the sliding block 34. A fixed rod 33 is fixedly connected inside the sliding chamber, which serves as a guide and support. A sliding block 34 is slidably connected to the inner wall of the sliding chamber. The sliding block 34 can slide along the fixed rod 33. The two sliding blocks 34 are rotatably connected to the end axis of the pressure roller 32 on the adjacent side, so that the pressure roller 32 can move with the sliding block 34 and can rotate on its own. The inner wall of the sliding block 34 is slidably connected to the outer wall of the fixed rod 33 to ensure smooth sliding. A spring 35 is sleeved on the outside of the fixed rod 33. The spring 35 is elastic. The bottom end of the spring 35 is fixedly connected to the top end of the sliding block 34. The top end of the spring 35 is fixedly connected to the top end of the inner wall of the sliding chamber. The elastic force of the spring 35 can make the pressure roller 32 adaptively contact the conveyor roller 30.

[0031] The working principle of the cotton cleaning and impurity removal machine provided by this utility model is as follows:

[0032] First, start the auger motor 5. The auger motor 5 drives the auger rod 10 to rotate in the conveying chamber 8. Multiple blades 9 on the inner wall of the conveying chamber 8 are located at the intervals of the blades of the auger rod 10. As the auger rod 10 rotates, cotton enters the conveying chamber 8 of the conveying pipe 3 from the feed pipe 4. While the auger rod 10 rotates and pushes the cotton, the blades 9 perform preliminary cutting and breaking up of the cotton, breaking up the cotton clumps. The processed cotton is conveyed to the feed column 7 through the conveying pipe 3 and enters the beating chamber 11 in the box 6.

[0033] After entering the beating chamber 11, the drive motor 28 starts and drives the beating roller 14 to rotate through the first transmission component. Specifically, the drive motor 28 drives the first rotating wheel 17 to rotate, and the first rotating wheel 17 drives another first rotating wheel 17 to rotate through the first belt pulley 18, which in turn causes the first rotating rod 16 to rotate, ultimately driving the beating roller 14 to rotate inside the beating chamber 11. The multiple beating blades 15 outside the beating roller 14 rotate accordingly, beating the cotton that has entered the beating chamber 11. Under the action of the beating force, some of the hard lumps in the cotton, such as pebbles, dry mud, and cotton seeds, fall through the first filter plate 19 into the collection box 26 below. At the same time, the vibration motor at the bottom of the first filter plate 19 starts, which can assist impurities to pass through the filter plate and prevent the filter plate from clogging.

[0034] The cotton processed in the beating chamber 11 enters the loosening chamber 12 through the conveying pipe 13. At this time, another set of drive motors 28 works, driving the connecting sleeve 20 to rotate with the help of the second transmission component. That is, the drive motor 28 drives the second rotating wheel 23 to rotate. The second rotating wheel 23 causes other second rotating wheels 23 to rotate through the second belt pulley 24, which in turn causes the second rotating rod 22 to rotate. Finally, the connecting sleeve 20 rotates, and the multiple stabs 21 on its outside tear and loosen the cotton, separating the cotton seeds that were not removed in the beating chamber 11 from the cotton. The separated cotton seeds and other impurities fall into the collection box 26 through the second filter plate 25. The vibration motor at the bottom of the second filter plate 25 can also assist in impurity filtration and prevent clogging.

[0035] After the cotton has been opened and cleaned, it continues to be conveyed in the opening chamber 12 to the discharge hole 29. The rotating motor 31 is started, driving the conveying roller 30 to rotate. At the same time, the pressure roller 32, due to the sliding block 34 in the sliding chamber, is in contact with the conveying roller 30 under the elastic force of the spring 35. After the cotton enters the discharge hole 29, it is squeezed out between the pressure roller 32 and the conveying roller 30 under the rotation of the conveying roller 30. The cotton seeds and other impurities that cannot pass through are left on the second filter plate 25, thus completing the entire process of cotton cleaning and impurity removal.

[0036] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A cotton cleaning and impurity removal machine, characterized in that, include: The bottom plate (1) has a support frame (2) fixedly connected to the top left side of the bottom plate (1), a conveying pipe (3) fixedly connected to the top of the support frame (2), a feed pipe (4) fixedly connected to the top of the conveying pipe (3), an auger motor (5) installed on the top of the bottom plate (1) to the left of the support frame (2), a box (6) fixedly connected to the top right side of the bottom plate (1), a feed column (7) fixedly connected to the top left side of the box (6), and a conveying chamber (8) opened inside the conveying pipe (3). The conveying assembly is installed on the inner wall of the conveying chamber (8); The slapping chamber (11) is located on the left side of the box body (6), and the loosening chamber (12) is located on the right side of the box body (6). A conveying pipe (13) is located between the slapping chamber (11) and the loosening chamber (12) inside the box body (6). Two slapping rollers (14) are rotatably connected inside the slapping chamber (11), and multiple slapping blades (15) are fixedly connected to the outside of the slapping rollers (14). The first transmission assembly is installed on the inner wall of the beating roller (14); The first filter plate (19) is slidably connected to the inner wall of the slapping chamber (11) at the bottom end of the slapping blade (15). Multiple connecting sleeves (20) are rotatably connected to the inner wall of the loosening chamber (12). Multiple bayonets (21) are fixedly connected to the outside of the connecting sleeves (20). The second transmission assembly is installed on the inner wall of the connecting sleeve (20); The second filter plate (25) is slidably connected to the bottom end of the bayonet (21) on the inner wall of the loosening chamber (12). The bottom ends of both filter plates are fixedly connected to a vibration motor. The inside of the box (6) is slidably connected to the bottom ends of the first filter plate (19) and the second filter plate (25). The top rear side of the bottom plate (1) is fixedly connected to a support rod (27). The top end of the support rod (27) is fixedly connected to a drive motor (28). The discharge hole (29) is provided on the right side of the box (6). The bottom of the inner wall of the discharge hole (29) is rotatably connected to the conveying roller (30). The rear side of the box (6) is fixedly connected to the discharge hole (29) at the corresponding position. The top of the inner wall of the discharge hole (29) is movably connected to the pressure roller (32). The inner walls of the discharge hole (29) are provided on both sides. The sliding chambers are fixedly connected to the inside of the sliding chambers. The inner walls of the sliding chambers are slidably connected to the sliding blocks (34). The outside of the fixed rods (33) is fitted with springs (35).

2. The cotton cleaning and cleaning machine according to claim 1, characterized in that, The conveying assembly includes multiple blades (9), the outer walls of the multiple blades (9) are fixedly connected to the inner wall of the conveying chamber (8), and the inner wall of the conveying chamber (8) is rotatably connected to an auger rod (10).

3. The cotton cleaning and cleaning machine according to claim 1, characterized in that, The first transmission assembly includes a first rotating rod (16), the outer side of the first rotating rod (16) is fixedly connected to the inner wall of the patting roller (14), the rear end of the first rotating rod (16) is fixedly connected to a first rotating wheel (17), and the outer sides of the two first rotating wheels (17) are fitted with first pulleys (18).

4. The cotton cleaning and cleaning machine according to claim 1, characterized in that, The second transmission assembly includes a second rotating rod (22), the outer side of the second rotating rod (22) is fixedly connected to the inner wall of the connecting sleeve (20), the rear end of the second rotating rod (22) is fixedly connected to a second rotating wheel (23), and a second pulley (24) is sleeved on the outer side of a plurality of second rotating wheels (23).

5. A cotton cleaning and cleaning machine according to claim 1, characterized in that, One end of the conveying pipe (3) is fixedly connected to the outside of the auger motor (5), and the end of the conveying pipe (3) away from the auger motor (5) is fixedly connected to the top of the feed column (7). The drive end of the rotating motor (31) is fixedly connected to the rear side of the conveying roller (30). The inner wall of the sliding block (34) is slidably connected to the outer wall of the fixed rod (33). The bottom end of the spring (35) is fixedly connected to the top end of the sliding block (34). The top end of the spring (35) is fixedly connected to the top end of the inner wall of the sliding chamber. The two sliding blocks (34) are rotatably connected to the end axis of the pressure roller (32). The outside of the pressure roller (32) is in contact with the outside of the conveying roller (30).

6. A cotton cleaning and impurity removal machine according to claim 2, characterized in that, The multiple blades (9) are positioned at the intervals of the blades of the auger rod (10), and one end of the auger rod (10) is fixedly connected to the drive end of the auger motor (5).

7. A cotton cleaning and impurity removal machine according to claim 3, characterized in that, The end of the first rotating rod (16) is rotatably connected to the inner wall of the striking chamber (11), the front side of the two first rotating wheels (17) is rotatably connected to the rear side of the box (6), and the rear end of one of the first rotating wheels (17) is fixedly connected to the driving end of one of the drive motors (28).

8. A cotton cleaning and cleaning machine according to claim 4, characterized in that, The end of the second rotating rod (22) is rotatably connected to the inner wall of the opening chamber (12), the front side of the multiple second rotating wheels (23) is rotatably connected to the rear side of the box (6), and the rear end of one of the second rotating wheels (23) is fixedly connected to the driving end of another drive motor (28).

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