A scraper device for a road milling machine and its usage method

Abstract

This invention relates to the field of milling machine technology, and discloses a scraping device for a road milling machine and its usage method. The device includes a frame, a movable conveying cylinder installed on the inner wall of the frame, a spiral conveying module installed inside the conveying cylinder, a material cylinder fixedly connected to the tail end of the conveying cylinder, scraping mechanisms installed at both ends of the material cylinder, a servo motor and a negative pressure dust collector respectively installed on the top of the material cylinder, and a transmission shaft driven by the servo motor rotatably connected to the axis of the material cylinder. The scraping mechanism includes an inner cylinder fixedly connected to the material cylinder, a guide frame fixed to the surface of the material cylinder, and a transmission bevel gear ring fixed to the end of the transmission shaft. A feed port is opened at the top of the inner cylinder, and the conveying shaft is rotatably connected to the inner wall of the inner cylinder. This invention, through the arrangement of the inner cylinder, outer spiral cylinder, milling module, and scraping module, enables the device to simultaneously achieve road milling and the collection, scraping, and centralized directional conveying of milled material within one transmission rotation cycle.

Description

Technical Field

[0001] This invention relates to the field of milling machine technology, specifically to a scraper device for a road milling machine and its usage method. Background Technology

[0002] A road milling machine is a highly efficient road maintenance and repair equipment. Its main working component is the milling device, which consists of a milling rotor, a rotor housing, and a milling rotor reducer. Road materials are crushed into granules under the impact and compression of the milling rotor cutters. The waste material is collected by the collection plate at the rear of the rotor housing. The cutters, arranged in a spiral symmetrical pattern, gather the waste material towards the center of the rotor. The waste material is then thrown onto the conveyor by the throwing plate and transferred to a designated location and transport vehicle.

[0003] For example, patent document CN110685248B discloses a milling machine cleaning device, including a cleaning box, a rotating shaft, a rolling cleaning mechanism, an adsorption adjustment mechanism, a conveying mechanism, and a sealing silicone membrane. The cleaning box includes a circular cleaning chamber, a conveying chamber, and a negative pressure adsorption chamber. The conveying chamber is located between the circular cleaning chamber and the negative pressure adsorption chamber. The circular cleaning chamber is provided with a cleaning port and a connecting port. The conveying chamber is connected to the circular cleaning chamber through the connecting port. A guide plate is provided between the connecting port and the cleaning port. One end of the rotating shaft passes through the circular cleaning chamber. The rolling cleaning mechanism is located on the rotating shaft inside the circular cleaning chamber. The above-mentioned milling machine cleaning device uses arranged steel nails to discharge larger waste materials, and then uses a plastic... The material brush sweeps away the powder to achieve a cleaning effect. The faster the rotating shaft drives the rolling cleaning mechanism to rotate, the better the cleaning effect. At the same time, by adjusting the angle of the steel nails through the buffer, the steel nails can be prevented from directly contacting the uneven ground and causing damage. This effectively ensures the cleaning effect while extending the life of the cleaning part. However, the transmission mechanism of the existing scraping device is relatively complex, which makes it inconvenient to simultaneously achieve milling of the road surface and collection of milled material within one transmission rotation cycle. In addition, the existing milling machine is not convenient to achieve negative pressure suction to remove milling dust during milling operations. Based on this, the present invention provides a scraping device for a road milling machine to solve the technical problems mentioned in the background art. Summary of the Invention

[0004] The purpose of this invention is to provide a scraper device for a road milling machine and its usage method, solving the problems in the prior art where the transmission mechanism of existing scraper devices is relatively complex, making it inconvenient to simultaneously achieve road milling and collection of milled material within one transmission rotation cycle. Furthermore, existing milling machines are not convenient for achieving negative pressure suction to remove milling dust during milling operations. This invention provides the following technical solution:

[0005] To achieve the above objectives, according to a first aspect of the present invention, a scraping device for a road milling machine is provided, comprising a frame, a movable conveying cylinder installed on the inner wall of the frame, a spiral conveying module installed inside the conveying cylinder, a material cylinder fixedly connected to the tail end of the conveying cylinder, scraping mechanisms installed at both ends of the material cylinder, a servo motor and a negative pressure dust collector respectively installed on the top of the material cylinder, and a transmission shaft driven by the servo motor rotatably connected to the axial position of the material cylinder.

[0006] The scraping mechanism includes an inner cylinder fixedly connected to the material cylinder, a guide frame fixed to the surface of the material cylinder, and a transmission bevel gear ring fixed to the end of the transmission shaft. A feed inlet is located at the top of the inner cylinder. A conveying shaft is rotatably connected to the inner wall of the inner cylinder. The conveying shaft is driven by a servo motor. The inner wall of the conveying shaft is rotatably connected to the transmission shaft. Spiral collecting blades that fit against the inner cylinder are fixedly installed on the circumferential side of the conveying shaft. An outer rotating cylinder is rotatably connected to the circumferential side of the inner cylinder. The inner wall of the outer rotating cylinder is fixedly connected to the conveying shaft. A set of scraping modules and a set of milling modules arranged in a circular array are fixedly installed on the circumferential side of the outer rotating cylinder. A guide seat is fixedly installed inside the outer rotating cylinder at the position of each adjacent scraping module. A discharge port that cooperates with the feed inlet is fixedly opened inside the outer rotating cylinder at the position between each adjacent guide seat. The port of each milling module is connected to a negative pressure vacuum cleaner. The milling module is driven by the transmission bevel gear ring.

[0007] Preferably, a movable frame is fixedly installed on the circumferential side of the conveying cylinder, and two symmetrically arranged sliding grooves are opened inside the movable frame. The circumferential side of the carrier is slidably connected to the sliding grooves, and a horizontally arranged electric push rod is fixedly installed between the opposing surfaces of the carrier and the movable frame.

[0008] Preferably, the spiral conveying module includes a conveying motor fixed to the top of the conveying cylinder and a rotating shaft rotatably connected to the inner wall of the conveying cylinder. The output shaft end of the conveying motor is fixedly connected to the rotating shaft. A spiral conveying blade is fixedly installed on the circumferential side of the rotating shaft. The circumferential side of the spiral conveying blade is rotatably attached to the conveying cylinder. A discharge pipe with a vertically downward discharge direction is fixedly connected to the circumferential side of the conveying cylinder.

[0009] Preferably, a first driven bevel gear is fixedly installed on the circumferential side of the transmission shaft, a second driven bevel gear is fixedly installed on the circumferential side of the conveying shaft, and a driving bevel gear a and a driving bevel gear b are fixedly installed on the output shaft end of the servo motor respectively. The circumferential side of the driving bevel gear a is connected to the first driven bevel gear, and the circumferential side of the driving bevel gear b is connected to the second driven bevel gear. The second driven bevel gears in the two scraping mechanisms are symmetrically arranged about the vertical plane where the axis of the servo motor is located.

[0010] Preferably, the shovel module includes a guide frame fixed to the circumferential side of the outer rotating cylinder and a set of first guide rods arranged in a linear array and fixed to the circumferential side of the outer rotating cylinder. The inner wall of the guide frame is slidably connected to the bucket. The circumferential side of the set of first guide rods is slidably connected to the bucket. The circumferential side of the first guide rods and the position corresponding to the position between the outer rotating cylinder and the bucket are fitted with a first anti-compression spring. The side of the bucket is rotatably connected to a first guide pressure roller that is slidably connected to the guide frame.

[0011] Preferably, the milling module includes a milling frame and a set of second guide rods arranged in a linear array and fixed to the circumferential side of the outer rotating cylinder. The inner wall of the milling frame is slidably connected to the set of second guide rods. A second anti-compression spring is sleeved on the circumferential side of the second guide rods at a position corresponding to the position between the milling frame and the outer rotating cylinder. A milling roller is rotatably connected between the inner surfaces of the milling frame. Milling teeth are evenly distributed on the circumferential side of the milling roller. The circumferential side of the milling roller is connected to the transmission bevel gear ring through a linkage component. An air guide module communicating with a negative pressure vacuum cleaner is fixedly installed at the end of the milling roller. A second guide pressure roller that is slidably connected to the guide frame is rotatably connected to the circumferential side of the milling frame.

[0012] Preferably, the linkage components include a movable sleeve rotatably connected to the inner wall of the milling frame and a fixed shaft rotatably connected to the outside of the outer rotary cylinder. The tail end of the fixed shaft is fixedly equipped with a passive bevel gear that is connected to the transmission bevel gear ring. One end of the milling roller is fixedly equipped with an inner bevel gear. The front end of the movable sleeve is fixedly equipped with an outer bevel gear that meshes with the inner bevel gear. A driven shaft groove is fixedly opened inside the movable sleeve. The inner wall of the driven shaft groove is slidably connected to the fixed shaft. The cross-sections of the driven shaft groove and the fixed shaft are both regular polygons.

[0013] Preferably, the axes of the first guide rod, the second guide rod, and the moving sleeve are all perpendicular to the axis of the outer rotating cylinder, and the axis of the milling roller is parallel to the axis of the outer rotating cylinder.

[0014] Preferably, the air guiding module includes a dust suction ring pipe fixedly connected to the material cylinder, a negative pressure ring pipe rotatably connected to the peripheral side of the dust suction ring pipe, a negative pressure flow channel fixedly opened at the axial position of the milling roller, a plurality of negative pressure suction holes arranged in a circumferential array and connected to the negative pressure flow channel are opened inside the milling roller, a corrugated connecting pipe rotatably connected to the tail end of the negative pressure flow channel, and the other end of the corrugated connecting pipe is fixedly connected to the negative pressure ring pipe.

[0015] Preferably, the guide frame has an upper guide ring groove and a lower guide ring groove that are interconnected inside. The inner walls of the upper guide ring groove and the lower guide ring groove are slidably engaged with the first guide pressure roller and the second guide pressure roller. An arc-shaped transition section is fixedly provided at the connection between the upper guide ring groove and the lower guide ring groove. The radii of the upper guide ring groove and the lower guide ring groove are different. The lower guide ring groove is located below the outer rotating cylinder.

[0016] According to a second aspect of the present invention, a method of using a scraper device for a road milling machine is provided, comprising:

[0017] S100: The surface of the carrier is connected to the road milling machine through relevant positioning connectors. The road milling machine is used to supply power to this device and to perform central control operations on this device. The discharge direction of the unloading pipe is towards the conveying mechanism of the road milling machine. The conveying mechanism can be a ring conveyor belt. The conveying mechanism is used to transport the residue discharged from the unloading pipe to the designated receiving equipment. The road milling machine pulls and lifts this device, and then performs milling operations.

[0018] S200: The outer rotating cylinder rotates clockwise at a set speed. When the rotation of the outer rotating cylinder drives the bucket and milling roller to move to the position of the lower guide ring groove, the bucket or milling roller fully expands and extends outward, and then performs milling, scraping and material collection operations on the road surface.

[0019] S300: When the bucket and milling roller move to the position of the upper guide ring groove, the bucket or milling roller fully retracts inward. The material scooped out and collected by the bucket finally enters the inner cylinder through the discharge port and the feed port. The material entering the inner cylinder is conveyed to the discharge pipe through the spiral collecting blade and the spiral conveying blade.

[0020] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0021] 1. By setting up an inner cylinder, an outer rotating cylinder, a milling module, and a scraping module, this invention enables the device to simultaneously mill the road surface and collect, scrape, and centrally and directionally transport the milled material within one transmission rotation cycle. Through the simplification of the above process and the realization of the functions, on the one hand, the transmission complexity of this device can be effectively reduced, thereby reducing the maintenance difficulty and maintenance cost of this device; on the other hand, the milling and scraping efficiency of this milling machine can be effectively improved.

[0022] 2. By setting up structures such as the dust suction ring pipe and the negative pressure ring pipe, this invention enables the device to simultaneously remove milling dust during road milling operations. Through the achievement of the above-mentioned technical effects, the dust-free operation of this milling machine is effectively improved. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a scraper device for a road milling machine according to the present invention;

[0024] Figure 2 for Figure 1 A magnified schematic diagram of the partial structure at point A in the middle;

[0025] Figure 3 for Figure 1 A magnified schematic diagram of the local structure at point B;

[0026] Figure 4 This is a schematic diagram of the structure of the conveying cylinder and the screw conveying module of the present invention;

[0027] Figure 5 This is a schematic diagram of the structure of the material cylinder and servo motor of the present invention;

[0028] Figure 6 for Figure 5 A magnified schematic diagram of the structure at point C in the middle;

[0029] Figure 7 This is a schematic diagram of the structure of the guide frame, upper guide ring groove, and lower guide ring groove of the present invention;

[0030] Figure 8 This is a schematic diagram of the corrugated pipe and milling roller of the present invention;

[0031] Figure 9 This is a schematic diagram of the structure of the milling teeth and milling roller of the present invention;

[0032] Figure 10 This is a schematic diagram of the structure of the guide frame and the first guide rod of the present invention.

[0033] The components include: 1. Carrier frame; 2. Conveying cylinder; 3. Screw conveyor module; 4. Material cylinder; 5. Servo motor; 6. Drive shaft; 7. Inner cylinder; 8. Guide frame; 9. Drive bevel gear ring; 10. Feed inlet; 11. Conveying shaft; 12. Screw collecting blade; 13. Outer rotating cylinder; 14. Guide seat; 15. Discharge port; 16. Moving frame; 17. Electric push rod; 18. Guide frame; 19. First guide rod; 20. Bucket; 21. ... 21. Compression spring; 22. First guide roller; 23. Milling frame; 24. Second guide rod; 25. Second compression spring; 26. Milling roller; 27. Milling tooth; 28. Second guide roller; 29. ​​Moving sleeve; 30. Fixed shaft; 31. Dust suction ring pipe; 32. Negative pressure ring pipe; 33. Negative pressure suction hole; 34. Corrugated connecting pipe; 35. Upper guide ring groove; 36. Lower guide ring groove; 37. Arc-shaped transition section; 38. Negative pressure vacuum cleaner. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Please see Figure 1-10 A scraping device for a road milling machine includes a frame 1, and a movable conveying cylinder 2 is installed on the inner wall of the frame 1.

[0036] A movable frame 16 is fixedly installed on the periphery of the conveying cylinder 2. Two symmetrically arranged sliding grooves are opened inside the movable frame 16. The periphery of the carrier 1 is slidably connected to the sliding grooves. A horizontally arranged electric push rod 17 is fixedly installed between the opposing surfaces of the carrier 1 and the movable frame 16.

[0037] In use, the inside of the carrier frame 1 is fixedly provided with positioning connection holes. The surface of the carrier frame 1 is connected to the road milling machine through relevant positioning connectors. The road milling machine is used to supply power to this device and to perform central control operations on this device.

[0038] The conveyor cylinder 2 is equipped with a screw conveyor module 3;

[0039] The screw conveyor module 3 includes a conveyor motor fixed to the top of the conveyor cylinder 2 and a rotating shaft rotatably connected to the inner wall of the conveyor cylinder 2. The output shaft end of the conveyor motor is fixedly connected to the rotating shaft. A screw conveyor blade is fixedly installed on the circumferential side of the rotating shaft. The circumferential side of the screw conveyor blade rotates and fits against the conveyor cylinder 2. A discharge pipe with a vertically downward discharge direction is fixedly connected to the circumferential side of the conveyor cylinder 2.

[0040] When in use, the discharge direction of the unloading pipe is directed toward the conveying mechanism of the road milling machine. The conveying mechanism can be a ring conveyor belt. The conveying mechanism is used to transport the residue discharged from the unloading pipe to the designated receiving equipment.

[0041] The tail end of the conveying cylinder 2 is fixedly connected to the material cylinder 4. Both ends of the material cylinder 4 are equipped with scraping mechanisms. The top of the material cylinder 4 is respectively equipped with a servo motor 5 and a negative pressure vacuum cleaner 38. The axis of the material cylinder 4 is rotatably connected to a transmission shaft 6 driven by the servo motor 5.

[0042] The scraping mechanism includes an inner cylinder 7 that is fixedly connected to the material cylinder 4, a guide frame 8 fixed to the surface of the material cylinder 4, and a transmission bevel gear ring 9 fixed to the end of the transmission shaft 6.

[0043] A feed inlet 10 is provided at the top of the inner cylinder 7. A conveying shaft 11 is rotatably connected to the inner wall of the inner cylinder 7. The conveying shaft 11 is driven by a servo motor 5. The inner wall of the conveying shaft 11 is rotatably connected to the transmission shaft 6. A spiral collecting blade 12 that fits against the inner cylinder 7 is fixedly installed on the circumferential side of the conveying shaft 11.

[0044] A first driven bevel gear is fixedly installed on the circumferential side of the drive shaft 6, and a second driven bevel gear is fixedly installed on the circumferential side of the conveying shaft 11. The output shaft end of the servo motor 5 is fixedly installed with a driving bevel gear a and a driving bevel gear b respectively. The circumferential side of the driving bevel gear a is connected to the first driven bevel gear, and the circumferential side of the driving bevel gear b is connected to the second driven bevel gear. The second driven bevel gears in the two scraping mechanisms are symmetrically arranged with the vertical plane where the axis of the servo motor 5 is located as the axis.

[0045] By setting two second driven bevel gears and a driving bevel gear b, the rotation direction of the conveying shaft 11 in the two scraping mechanisms is opposite. When the two scraping mechanisms are working, the spiral collecting blades 12 at the conveying shaft 11 convey the material in the direction of the conveying cylinder 4.

[0046] An outer rotating cylinder 13 is rotatably connected to the circumferential side of the inner cylinder 7. The inner wall of the outer rotating cylinder 13 is fixedly connected to the conveying shaft 11. A set of shovel modules and a set of milling modules arranged in a circular array are fixedly installed on the circumferential side of the outer rotating cylinder 13. A guide seat 14 is fixedly installed inside the outer rotating cylinder 13 and at the position of each adjacent shovel module. A discharge port 15 that cooperates with the feed port 10 is fixedly opened inside the outer rotating cylinder 13 and at the position between each adjacent guide seat 14. The port of each milling module is connected to the negative pressure vacuum cleaner 38. The milling module is driven by the transmission bevel gear ring 9.

[0047] The shovel module includes a guide frame 18 fixed to the side of the outer rotating cylinder 13 and a set of first guide rods 19 arranged in a linear array and fixed to the side of the outer rotating cylinder 13. The inner wall of the guide frame 18 is slidably connected to the bucket 20. The side of the first guide rods 19 is slidably connected to the bucket 20. The side of the first guide rods 19 and the position corresponding to the position between the outer rotating cylinder 13 and the bucket 20 are fitted with a first anti-compression spring 21. The side of the bucket 20 is rotatably connected to a first guide pressure roller 22 that is slidably connected to the guide frame 8.

[0048] The milling module includes a milling frame 23 and a set of second guide rods 24 arranged in a linear array and fixed to the periphery of the outer rotating cylinder 13. The inner wall of the milling frame 23 is slidably connected to the set of second guide rods 24. A second anti-compression spring 25 is sleeved on the periphery of the second guide rods 24 at the position corresponding to the position between the milling frame 23 and the outer rotating cylinder 13.

[0049] A milling roller 26 is rotatably connected between the inner surfaces of the milling frame 23. Milling teeth 27 are evenly distributed on the circumferential side of the milling roller 26. The circumferential side of the milling roller 26 is connected to the transmission bevel gear ring 9 through a linkage component.

[0050] The linkage components include a movable sleeve 29 rotatably connected to the inner wall of the milling frame 23 and a fixed shaft 30 rotatably connected to the outside of the outer rotating cylinder 13. The tail end of the fixed shaft 30 is fixedly installed with a passive bevel gear that is connected to the transmission bevel gear ring 9. One end of the milling roller 26 is fixedly installed with an inner bevel gear. The front end of the movable sleeve 29 is fixedly installed with an outer bevel gear that meshes with the inner bevel gear. A driven shaft groove is fixedly opened inside the movable sleeve 29. The inner wall of the driven shaft groove is slidably connected to the fixed shaft 30. The cross-sections of the driven shaft groove and the fixed shaft 30 are both regular polygons.

[0051] By setting the driven shaft groove and the fixed shaft 30 into regular polygonal cross sections, the fixed shaft 30 can continuously and effectively drive the moving sleeve 29 as the position of the moving sleeve 29 changes.

[0052] When the transmission bevel gear ring 9 is driven by the transmission shaft 6, the milling roller 26 is driven to rotate at a set speed through the setting of the linkage component;

[0053] An air guide module connected to a negative pressure vacuum cleaner 38 is fixedly installed at the end of the milling roller 26;

[0054] The air guiding module includes a dust suction ring pipe 31 fixedly connected to the material cylinder 4. The circumferential side of the dust suction ring pipe 31 is rotatably connected to a negative pressure ring pipe 32. A negative pressure flow channel is fixedly opened at the axial position of the milling roller 26. Multiple sets of negative pressure suction holes 33 are arranged in a circumferential array and connected to the negative pressure flow channel inside the milling roller 26. The tail end of the negative pressure flow channel is rotatably connected to a corrugated connecting pipe 34. The other end of the corrugated connecting pipe 34 is fixedly connected to the negative pressure ring pipe 32.

[0055] The milling frame 23 has a second guide roller 28 that is rotatably connected to the guide frame 8.

[0056] The axes of the first guide rod 19, the second guide rod 24, and the moving sleeve 29 are all perpendicular to the axis of the outer rotating cylinder 13, while the axis of the milling roller 26 is parallel to the axis of the outer rotating cylinder 13.

[0057] The guide frame 8 has an upper guide ring groove 35 and a lower guide ring groove 36 that are interconnected. The inner walls of the upper guide ring groove 35 and the lower guide ring groove 36 are slidably engaged with the first guide pressure roller 22 and the second guide pressure roller 28. An arc-shaped transition section 37 is fixedly provided at the connection between the upper guide ring groove 35 and the lower guide ring groove 36. The radii of the upper guide ring groove 35 and the lower guide ring groove 36 are different. The lower guide ring groove 36 is located below the outer rotating cylinder 13.

[0058] The positions of the bucket 20 and the milling roller 26 are effectively defined by the upper guide ring groove 35 and the lower guide ring groove 36.

[0059] In another embodiment of the present invention, a method for using a scraper device for a road milling machine is provided. In use, a positioning connection hole is fixedly opened inside the frame 1. The surface of the frame 1 is connected to the road milling machine through relevant positioning connectors. The road milling machine is used to supply power to the device and perform central control operation on the device. In use, the discharge direction of the unloading pipe is directed towards the conveying mechanism of the road milling machine. The conveying mechanism can be a ring conveyor belt. The conveying mechanism is used to transport the residue discharged from the unloading pipe to a designated receiving device. During operation, the road milling machine pulls and lifts the device, and then performs milling operation.

[0060] During operation, the outer rotating cylinder 13 rotates clockwise at a set speed. When the outer rotating cylinder 13 rotates, when the bucket 20 and milling roller 26 move to the position of the lower guide ring groove 36, the bucket 20 or milling roller 26 fully expands and extends outward, and then performs milling, scraping and material collection operations on the road surface. When the bucket 20 and milling roller 26 move to the position of the upper guide ring groove 35, the bucket 20 or milling roller 26 fully retracts inward. The material scooped out and collected by the bucket 20 finally enters the inner cylinder 7 through the discharge port 15 and the feed port 10. The material entering the inner cylinder 7 is conveyed to the discharge pipe through the spiral collecting blade 12 and the spiral conveying blade.

[0061] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A scraping device for a road milling machine, comprising a carrier (1), characterized in that: The inner wall of the carrier (1) is equipped with a movable conveying cylinder (2), and a spiral conveying module (3) is installed inside the conveying cylinder (2). The tail end of the conveying cylinder (2) is fixedly connected to a material cylinder (4). Both ends of the material cylinder (4) are equipped with scraping mechanisms. The top of the material cylinder (4) is respectively equipped with a servo motor (5) and a negative pressure vacuum cleaner (38). The axis of the material cylinder (4) is rotatably connected to a transmission shaft (6) driven by the servo motor (5). The scraping mechanism includes an inner cylinder (7) fixedly connected to the material cylinder (4), a guide frame (8) fixed to the surface of the material cylinder (4), and a transmission bevel gear ring (9) fixed to the end of the transmission shaft (6). A feed inlet (10) is opened at the top of the inner cylinder (7). A conveying shaft (11) is rotatably connected to the inner wall of the inner cylinder (7). The conveying shaft (11) is driven by a servo motor (5). The inner wall of the conveying shaft (11) is rotatably connected to the transmission shaft (6). A spiral collecting blade (12) that fits against the inner cylinder (7) is fixedly installed on the circumferential side of the conveying shaft (11). An outer rotating cylinder (12) is rotatably connected to the circumferential side of the inner cylinder (7). 3) The inner wall of the outer rotating cylinder (13) is fixedly connected to the conveying shaft (11). A set of shovel modules and a set of milling modules are fixedly installed on the circumferential side of the outer rotating cylinder (13). A guide seat (14) is fixedly installed inside the outer rotating cylinder (13) and at the position of each adjacent shovel module. A discharge port (15) that cooperates with the feed port (10) is fixedly opened inside the outer rotating cylinder (13) and at the position between each adjacent guide seat (14). The port of each milling module is connected to the negative pressure vacuum cleaner (38). The milling module is driven by the transmission bevel gear ring (9). The shovel module includes a guide frame (18) fixed to the periphery of the outer rotating cylinder (13) and a set of first guide rods (19) arranged in a linear array and fixed to the periphery of the outer rotating cylinder (13). The inner wall of the guide frame (18) is slidably connected to the bucket (20). The periphery of the set of first guide rods (19) is slidably connected to the bucket (20). The periphery of the first guide rods (19) and the position corresponding to the position between the outer rotating cylinder (13) and the bucket (20) are fitted with a first anti-compression spring (21). The side of the bucket (20) is rotatably connected to a first guide pressure roller (22) slidably connected to the guide frame (8). The milling module includes a milling frame (23) and a set of second guide rods (24) arranged in a linear array and fixed to the periphery of the outer rotating cylinder (13). The inner wall of the milling frame (23) is slidably connected to the set of second guide rods (24). A second anti-compression spring (25) is sleeved on the periphery of the second guide rod (24) at the position between the milling frame (23) and the outer rotating cylinder (13). A milling roller (26) is rotatably connected between the inner surfaces of the milling frame (23). Milling teeth (27) are evenly distributed on the periphery of the milling roller (26). The periphery of the milling roller (26) is connected to the transmission bevel gear ring (9) through a linkage component. An air guide module communicating with a negative pressure vacuum cleaner (38) is fixedly installed at the end of the milling roller (26). A second guide pressure roller (28) slidably connected to the guide frame (8) is rotatably connected to the periphery of the milling frame (23).

2. The scraper device for a road milling machine according to claim 1, characterized in that: A movable frame (16) is fixedly installed on the periphery of the conveying cylinder (2). The movable frame (16) has symmetrically arranged sliding grooves inside. The periphery of the carrier (1) is slidably connected to the sliding grooves. A horizontally arranged electric push rod (17) is fixedly installed between the relative surfaces of the carrier (1) and the movable frame (16).

3. The scraper device for a road milling machine according to claim 1, characterized in that: The spiral conveying module (3) includes a conveying motor fixed to the top of the conveying cylinder (2) and a rotating shaft rotatably connected to the inner wall of the conveying cylinder (2). The output shaft end of the conveying motor is fixedly connected to the rotating shaft. A spiral conveying blade is fixedly installed on the circumferential side of the rotating shaft. The circumferential side of the spiral conveying blade is rotatably attached to the conveying cylinder (2). A discharge pipe with a vertically downward discharge direction is fixedly connected to the circumferential side of the conveying cylinder (2).

4. The scraper device for a road milling machine according to claim 1, characterized in that: A first driven bevel gear is fixedly installed on the circumferential side of the transmission shaft (6), and a second driven bevel gear is fixedly installed on the circumferential side of the conveying shaft (11). The output shaft end of the servo motor (5) is fixedly installed with an active bevel gear a and an active bevel gear b respectively. The circumferential side of the active bevel gear a is connected to the first driven bevel gear, and the circumferential side of the active bevel gear b is connected to the second driven bevel gear. The second driven bevel gears in the two scraping mechanisms are symmetrically arranged with the vertical plane containing the axis of the servo motor (5) as the axis.

5. A scraper for a road milling machine according to claim 4, characterized in that: The linkage components include a movable sleeve (29) rotatably connected to the inner wall of the milling frame (23) and a fixed shaft (30) rotatably connected to the outside of the outer rotating cylinder (13). The tail end of the fixed shaft (30) is fixedly installed with a passive bevel gear that is connected to the transmission bevel gear ring (9). One end of the milling roller (26) is fixedly installed with an inner bevel gear. The front end of the movable sleeve (29) is fixedly installed with an outer bevel gear that meshes with the inner bevel gear. A driven shaft groove is fixedly opened inside the movable sleeve (29). The inner wall of the driven shaft groove is slidably connected to the fixed shaft (30). The cross-sections of the driven shaft groove and the fixed shaft (30) are both regular polygons. The axes of the first guide rod (19), the second guide rod (24) and the moving sleeve (29) are all perpendicular to the axis of the outer rotating cylinder (13), and the axis of the milling roller (26) is parallel to the axis of the outer rotating cylinder (13).

6. The scraper device for a road milling machine according to claim 5, characterized in that: The air guiding module includes a dust suction ring pipe (31) fixedly connected to the material cylinder (4). The circumferential side of the dust suction ring pipe (31) is rotatably connected to a negative pressure ring pipe (32). A negative pressure flow channel is fixedly opened at the axial position of the milling roller (26). Several sets of negative pressure suction holes (33) are opened inside the milling roller (26) in a circumferential array and connected to the negative pressure flow channel. The tail end of the negative pressure flow channel is rotatably connected to a corrugated connecting pipe (34). The other end of the corrugated connecting pipe (34) is fixedly connected to the negative pressure ring pipe (32).

7. A scraper for a road milling machine according to claim 6, characterized in that: The guide frame (8) has an upper guide ring groove (35) and a lower guide ring groove (36) that are interconnected. The inner walls of the upper guide ring groove (35) and the lower guide ring groove (36) are slidably engaged with the first guide pressure roller (22) and the second guide pressure roller (28). An arc-shaped transition section (37) is fixedly provided at the connection between the upper guide ring groove (35) and the lower guide ring groove (36). The radii of the upper guide ring groove (35) and the lower guide ring groove (36) are different. The lower guide ring groove (36) is located below the outer rotating cylinder (13).

8. A method of using a scraper device for a road milling machine as described in any one of claims 1-7, characterized in that, include: S100: The surface of the carrier (1) is connected to the road milling machine through relevant positioning connectors. The road milling machine is used to supply power to this device and to perform central control operations on this device. The discharge direction of the unloading pipe is towards the conveying mechanism of the road milling machine. The conveying mechanism is a ring conveyor belt. The conveying mechanism is used to transport the residue discharged from the unloading pipe to the designated receiving equipment. The road milling machine pulls and lifts this device, and then performs milling operations. S200: The outer rotating cylinder (13) rotates clockwise at a set speed. When the outer rotating cylinder (13) rotates and drives the bucket (20) and milling roller (26) to move to the position of the lower guide ring groove (36), the bucket (20) or milling roller (26) fully expands and extends outward, and then performs milling, scraping and material collection operations on the road surface. S300: When the bucket (20) and milling roller (26) move to the position of the upper guide ring groove (35), the bucket (20) or milling roller (26) fully retracts inward, and the material scooped out and collected by the bucket (20) finally enters the inner cylinder (7) through the discharge port (15) and the feed port (10). The material entering the inner cylinder (7) is conveyed to the unloading pipe through the spiral collecting blade (12) and the spiral conveying blade.

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