A stepped composite milling cutter with a dust collecting cover and a cutter head assembly thereof

Abstract

The present invention relates to the field of milling technology, and specifically to a stepped composite milling cutter with a dust collecting cover and a cutter disc assembly thereof, comprising a milling cutter disc and a load-bearing connecting plate, wherein a milling cutter mounting assembly is interspersed on the outer surface of the milling cutter disc, and the milling cutter mounting assembly comprises a plurality of cutter head mounting cylinders annularly arranged inside the milling cutter disc, and a threaded opening opened on the inner wall of the cutter head mounting cylinder, wherein a first milling cutter, a second milling cutter and a third milling cutter are respectively arranged on the inner sides of the plurality of cutter head mounting cylinders, and the first milling cutter, the second milling cutter and the third milling cutter are respectively threadedly connected with the threaded opening, a supporting ring sleeve is arranged inside the milling cutter disc, and the plurality of cutter head mounting cylinders are interspersed and fixedly arranged with the supporting ring sleeve, and a collecting assembly is arranged at the bottom end of the load-bearing connecting plate, which is beneficial to the disassembly of the milling cutter, convenient for later maintenance and care, and convenient for collecting flying chips.

Description

Technical Field

[0001] The invention relates to the technical field of milling, in particular to a stepped composite milling cutter with a dust collecting cover and a cutter head assembly thereof. Background Art

[0002] A milling cutter is a rotating tool with one or more teeth used for milling. When working, each tooth cuts off the excess of the workpiece intermittently in sequence. Milling cutters are mainly used to process planes, steps, grooves, forming surfaces and cut off workpieces on milling machines.

[0003] At present, the existing milling cutter adopts a single component, which makes the function of the milling cutter single. When the milling cutter with different threads needs to be replaced, the milling cutter needs to be disassembled back and forth for replacement, which causes inconvenience to the milling cutter. At the same time, the disassembly operation is complicated, which is not convenient for later repair and maintenance. When the milling cutter cuts the workpiece, the milling cutter is not provided with a dust cover. When the milling cutter is milling and removing chips, the waste chips will splash and scatter due to the high-speed rotation of the tool, which is not convenient for the later centralized cleaning of dust and waste chips. Therefore, a stepped composite milling cutter with a dust cover and its cutter disc assembly are urgently needed to solve this problem. Summary of the invention

[0004] In view of the deficiencies of the prior art, the present invention provides a stepped composite milling cutter with a dust cover and a cutter disc assembly thereof, which solves the following problems: the existing milling cutter adopts a single component, which makes the function of the milling cutter single, and when the milling cutter with different threads needs to be replaced, the milling cutter needs to be disassembled back and forth for replacement, which causes inconvenience to the milling cutter. At the same time, the disassembly operation is complicated, which is not convenient for later repair and maintenance. Moreover, when the milling cutter cuts a workpiece, the milling cutter is not provided with a dust cover. When the milling cutter is milling and removing chips, the waste chips will splash and scatter due to the high-speed rotation of the tool, which makes it inconvenient to centrally clean the dust and waste chips later.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] The technical solution adopted by the present invention to solve its technical problems is: a stepped composite milling cutter with a dust collecting cover and its cutter disc assembly, including a milling cutter disc and a load-bearing connecting plate, the outer surface of the milling cutter disc is interspersed with a milling cutter mounting assembly, the milling cutter mounting assembly includes a plurality of cutter head mounting cylinders annularly arranged inside the milling cutter disc, and a threaded opening opened on the inner wall of the cutter head mounting cylinder, the inner sides of the plurality of cutter head mounting cylinders are respectively provided with a first milling cutter, a second milling cutter and a third milling cutter, the first milling cutter, the second milling cutter and the third milling cutter are respectively threadedly connected with the threaded opening, a supporting ring sleeve is arranged inside the milling cutter disc, the plurality of cutter head mounting cylinders are interspersed and fixedly arranged with the supporting ring sleeve, a collecting assembly is arranged at the bottom end of the load-bearing connecting plate, the bottom end of the load-bearing connecting plate is fixedly connected to the body connecting assembly, an anti-slip reinforcement assembly is installed inside the milling cutter disc, and a milling cutter limiting assembly is arranged inside the milling cutter disc.

[0007] Preferably, the collecting assembly comprises a collecting cover arranged at the bottom end of the load-bearing connecting plate, and an access pipe inserted through one end of the load-bearing connecting plate, wherein the access pipe is in communication with the collecting cover.

[0008] Preferably, the fuselage connection assembly includes two mounting plates fixedly connected to the bottom end of the load-bearing connecting plate, and a shaft rod rotatably connected between the two mounting plates, wherein a micro stepping motor is fixedly mounted on one end of one of the mounting plates, and the output shaft of the micro stepping motor is fixedly connected to one of the shaft rods.

[0009] Preferably, the outer surfaces of the two shafts are fixedly sleeved with limiting sleeves, both ends of the milling cutter disc are provided with L-shaped positioning plates used in conjunction with the limiting sleeves, and the two limiting sleeves are fixedly connected with a positioning drive assembly at one end away from each other.

[0010] Preferably, the positioning drive assembly includes two sleeves fixedly connected to the ends away from the limiting sleeve, a clamping rod is movably arranged inside the sleeve, a chuck is welded inside the sleeve, and a limiting spring matching the chuck is mounted inside the sleeve. Rubber heads are connected to the sides away from the two clamping rods, through holes are arranged at both ends of the milling cutter disc, and the corresponding sides of the two clamping rods pass through the limiting sleeve and correspond to the clamping rod.

[0011] Preferably, a rotating shaft is rotatably installed inside the milling cutter disc, a rotating drum is fixedly mounted on the outer surface of the rotating shaft, a plurality of traction rods are rotatably connected to the outer surface of the rotating drum in an annular manner with equal spacing, and one end of the rotating shaft passes through the milling cutter disc and is fixedly connected to a torsion disc.

[0012] Preferably, a plurality of limiting sliding grooves are provided in an annular manner on the outer surface of the support ring sleeve, a limiting sliding block is slidably provided inside the limiting sliding groove, and the other end of the traction rod is rotatably connected to the limiting sliding block.

[0013] Preferably, the anti-slip reinforcement component includes a positioning plate fixedly installed inside the milling cutter disc, and a pawl installed in an annular manner and equidistantly at one end of the positioning plate, one end of the pawl is fixedly connected to a return spring, and one end of the positioning plate is annularly equidistantly installed with a plurality of limit blocks, a small electric push rod movably connected to the pawl is fixedly installed in the middle of the limit block, and a ratchet is fixedly sleeved on the outer surface of the rotating shaft, and the ratchet is used in conjunction with the pawl.

[0014] Preferably, the milling cutter limiting assembly comprises a plurality of clip brackets annularly fixedly mounted inside the milling cutter disc, and a limiting clip bracket slidably disposed inside the clip bracket, and a clip opening is provided at one end of the cutter head mounting cylinder.

[0015] Preferably, two tough bent rods are fixedly connected to the outer surface of the limit sliding block, and one end of the two tough bent rods is commonly connected to a bent plate used in conjunction with the limit clip strip.

[0016] Beneficial effects of the present invention:

[0017] (1) The present invention describes a stepped composite milling cutter with a dust cover and a cutter disc assembly thereof. When the milling cutter needs to be replaced, the user only needs to manually pull the rubber head. The rubber head is pulled, and the clamping rod moves out of the sleeve. The clamping rod moves and the chuck compresses the limiting spring, thereby pulling the clamping rod to separate from the through hole on the milling cutter disc. The user then lifts the milling cutter disc, allowing the L-shaped positioning plate to leave the limiting sleeve and then removes the entire milling cutter disc, which is beneficial for the replacement of the milling cutter and convenient for maintenance.

[0018] (2) The present invention describes a stepped composite milling cutter with a dust cover and a cutter disc assembly thereof. Then, the user controls an external controller to control the small electric push rod to retract one end distance. After the push rod of the small electric push rod retracts, it drives the pawl to move, so that when the pawl is pulled up, it drives the reset spring to extend. After the pawl moves, it separates from the ratchet wheel. Then, the user rotates the torsion disk. After the torsion disk rotates, it drives the rotating shaft to rotate. After the rotating shaft rotates, it drives the rotating drum to rotate. When the rotating drum rotates, it drives the traction rod to move. After the traction rod moves, it drives the limit slider to slide in the limit slide groove. Under the sliding of the limit slider, it drives the tough bending rod to pull the bending plate to move. After the bending plate moves, it drives the limiting card strip to move. After the movement, the limiting card strip is pulled out from the first milling cutter, the second milling cutter or the third milling cutter and the cutter head mounting tube. Then, the user rotates one of the milling cutters to be maintained, thereby separating it from the threaded mouth and taking it out. This is conducive to using different types of milling cutters at the same time and improving the milling effect.

[0019] (3) The present invention describes a stepped composite milling cutter with a dust cover and its cutter disc assembly, and then the milling cutter is installed by reverse operation. The user controls the micro stepping motor to turn on through an external controller. After the micro stepping motor is running, it drives the shaft to rotate. After the shaft rotates, it drives the limit sleeve to rotate, thereby driving the L-shaped positioning plate or the positioning drive assembly to rotate, so that the milling cutter disc is driven to rotate to a predetermined angle. The first milling cutter, the second milling cutter or the third milling cutter of different models are adjusted as needed for milling. When milling, the access tube and the external debris collection device are connected to the access tube, and the milling debris is collected through the collection cover to ensure the working environment and quality of milling. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0021] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention;

[0022] Figure 2 It is a schematic diagram of the structure of the present invention from another external perspective;

[0023] Figure 3 It is a schematic cross-sectional structural diagram of a milling cutter disc of the present invention;

[0024] Figure 4 A schematic diagram of a half-section structure of a milling insert according to the present invention;

[0025] Figure 5 It is a schematic diagram of the structure of the anti-skid reinforcement component of the present invention;

[0026] Figure 6 It is a schematic diagram of the structure of the milling cutter disc and the positioning drive assembly of the present invention;

[0027] Figure 7 It is a schematic diagram of the structure of the cutter head mounting cylinder of the present invention;

[0028] Figure 8 For the present invention Figure 4 The enlarged structural diagram at A in the middle;

[0029] In the figure: 1. milling cutter disc; 2. No. 1 milling cutter; 551. milling cutter installation assembly; 552. fuselage connection assembly; 553. positioning drive assembly; 554. collection assembly; 555. anti-skid reinforcement assembly; 556. milling cutter limit assembly; 3. No. 2 milling cutter; 4. reset spring; 5. shaft rod; 6. micro stepping motor; 7. limit sleeve; 8. sleeve; 9. mounting plate; 10. access pipe; 11. load-bearing connecting plate; 12. collection cover; 13. No. 3 milling cutter; 14. rubber head; 15. Tough bending rod; 16. Support ring sleeve; 17. Pull rod; 18. Rotating shaft; 19. Rotating drum; 20. Cutter head mounting cylinder; 21. Bending plate; 22. Limiting block; 23. Small electric push rod; 24. Ratchet; 25. Paw; 26. Threaded mouth; 27. Bayonet; 28. Limiting spring; 29. ​​Chuck; 30. Clamping rod; 31. Twisting disk; 32. Limiting clamping strip; 33. Clamping strip bracket; 34. Limiting slider; 35. L-shaped positioning plate; 36. Limiting slide groove; 37. Positioning disk. DETAILED DESCRIPTION

[0030] The embodiment of the present invention provides a stepped composite milling cutter with a dust cover and a cutter head assembly thereof, thereby solving the problem that the existing milling cutter adopts a single component, which makes the function of the milling cutter single, and when a milling cutter with different threads needs to be replaced, the milling cutter needs to be disassembled back and forth for replacement, which causes inconvenience to the milling cutter. At the same time, the disassembly operation is complicated, which is not convenient for later repair and maintenance. Moreover, when the milling cutter cuts a workpiece, the milling cutter is not provided with a dust cover. When the milling cutter is milling and removing chips, the waste chips will splash and scatter due to the high-speed rotation of the tool, which makes it inconvenient to centrally clean the dust and waste chips later.

[0031] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0032] like Figure 1-Figure 8 As shown, a stepped composite milling cutter with a dust collecting cover and a cutter disc assembly thereof of the present invention include a milling cutter disc 1 and a load-bearing connecting plate 11. A milling cutter mounting assembly 551 is interspersed on the outer surface of the milling cutter disc 1. The milling cutter mounting assembly 551 includes a plurality of cutter head mounting cylinders 20 annularly arranged inside the milling cutter disc 1, and a threaded opening 26 opened on the inner wall of the cutter head mounting cylinder 20. A first milling cutter 2, a second milling cutter 3 and a third milling cutter 13 are respectively arranged on the inner sides of the plurality of cutter head mounting cylinders 20. The first milling cutter 2, the second milling cutter 3 and the third milling cutter 13 are respectively threadedly connected with the threaded opening 26. A support ring sleeve 16 is arranged inside the milling cutter disc 1. The plurality of cutter head mounting cylinders 20 are interspersed and fixedly arranged with the support ring sleeve 16.

[0033] Specifically, a collecting assembly 554 is provided at the bottom end of the load-bearing connecting plate 11, and the collecting assembly 554 includes a collecting cover 12 arranged at the bottom end of the load-bearing connecting plate 11, and an access pipe 10 inserted and arranged at one end of the load-bearing connecting plate 11, the access pipe 10 is communicated with the collecting cover 12, and the bottom end of the load-bearing connecting plate 11 is fixedly connected to the fuselage connecting assembly 552, the fuselage connecting assembly 552 includes two mounting plates 9 fixedly connected to the bottom end of the load-bearing connecting plate 11, and a shaft 5 rotatably connected between the two mounting plates 9, one end of one of the mounting plates 9 is fixedly installed with a micro-stepping motor 6, the output shaft of the micro-stepping motor 6 is fixedly connected to one of the shafts 5, the outer surfaces of the two shafts 5 are fixedly sleeved with a limiting sleeve 7, both ends of the milling cutter disc 1 are provided with an L-shaped positioning plate 35 used in conjunction with the limiting sleeve 7, and the two limiting sleeves 7 are fixedly connected with a positioning drive assembly 553 at the far end, and the positioning drive assembly 553 includes The two sleeves 8 are fixedly connected to the ends away from the limiting sleeve 7, and a clamping rod 30 is movably arranged inside the sleeve 8. The clamping rod 30 is located inside the sleeve 8 and a chuck 29 is welded thereon. The clamping rod 30 is located inside the sleeve 8 and a limiting spring 28 matching the chuck 29 is mounted thereon. The two clamping rods 30 are connected to the rubber heads 14 on the sides away from each other. Through holes are provided at both ends of the milling cutter disc 1, and the corresponding sides of the two clamping rods 30 pass through the limiting sleeve 7 and correspond to the clamping rod 30. When the user needs to replace the milling cutter, he only needs to manually pull the rubber head 14. After the rubber head 14 is pulled, the clamping rod 30 moves out of the sleeve 8. After the clamping rod 30 moves, the chuck 29 is driven to compress the limiting spring 28, thereby pulling the clamping rod 30 to separate from the through hole on the milling cutter disc 1. Then the user lifts the milling cutter disc 1, so that the L-shaped positioning plate 35 leaves the limiting sleeve 7 and then the entire milling cutter disc 1 is removed, which is conducive to the disassembly of the cutter disc as a whole and is convenient to use.

[0034] Specifically, a rotating shaft 18 is rotatably installed inside the milling cutter disc 1, a rotating drum 19 is fixedly mounted on the outer surface of the rotating shaft 18, and a plurality of traction rods 17 are rotatably connected to the outer surface of the rotating drum 19 in an annular manner and equidistantly. One end of the rotating shaft 18 passes through the milling cutter disc 1 and is fixedly connected to a torsion disc 31. A plurality of limiting grooves 36 are provided in an annular manner on the outer surface of the supporting ring sleeve 16, and a limiting slider 34 is slidably arranged on the inner side of the limiting groove 36. The other end of the traction rod 17 is rotatably connected to the limiting slider 34, and two tough bent rods 15 are fixedly connected to the outer surface of the limiting slider 34. One end of the two tough bent rods 15 is commonly connected to a bent plate used in conjunction with the limiting card strip 32. 21, then the user rotates the twisting disk 31, and the twisting disk 31 rotates and drives the rotating shaft 18 to rotate, and the rotating shaft 18 rotates and drives the rotating drum 19 to rotate, and the rotating drum 19 drives the traction rod 17 to move when it rotates, and the traction rod 17 drives the limiting slider 34 to slide in the limiting slide groove 36 after the movement, and the sliding of the limiting slider 34 drives the tough bending rod 15 to pull the bending plate 21 to move, and the bending plate 21 moves and drives the limiting card strip 32 to move, and the limiting card strip 32 is pulled out from the first milling cutter 2, the second milling cutter 3, the third milling cutter 13 and the cutter head mounting tube 20 after the movement, which is beneficial to the installation and limiting of the milling cutter, and convenient for its replacement and maintenance.

[0035] Specifically, the interior of the milling cutter disc 1 is equipped with an anti-skid reinforcement component 555, which includes a positioning disc 37 fixedly installed inside the milling cutter disc 1 and a pawl 25 annularly equidistantly installed at one end of the positioning disc 37, one end of the pawl 25 is fixedly connected to a return spring 4, and a plurality of limit blocks 22 are annularly equidistantly installed at one end of the positioning disc 37, a small electric push rod 23 movably connected to the pawl 25 is inserted and fixedly installed in the middle of the limit block 22, a ratchet 24 is fixedly sleeved on the outer surface of the rotating shaft 18, and the ratchet 24 is used in conjunction with the pawl 25, and a milling cutter limiting component 556 is arranged inside the milling cutter disc 1, the milling cutter limiting component 556 includes a plurality of clip brackets 33 annularly fixedly installed inside the milling cutter disc 1, and a limiting clip bracket 32 ​​slidably arranged inside the clip bracket 33, and a bayonet 27 is provided at one end of the cutter head mounting tube 20, and a user controls an external controller to control the small electric push rod 23 to retract one end of the small electric push rod, and the push rod of the small electric push rod 23 retracts and drives the push rod 23 to move after the push rod retracts. The pawl 25 moves, so that when the pawl 25 is pulled up, the reset spring 4 is extended. After the pawl 25 moves, it is separated from the ratchet wheel 24, and one of the types of milling cutters to be maintained is rotated, so that it is separated from the threaded opening 26 and then taken out, which is beneficial to the replacement of the milling cutter and convenient maintenance. It can also use multiple types of milling cutters at the same time to improve the milling effect. Then the milling cutter is installed by reverse operation. The user controls the micro-stepping motor 6 to turn on through an external controller. After the micro-stepping motor 6 is turned on, it drives the shaft 5 to rotate. After the shaft 5 rotates, it drives the limit sleeve 7 to rotate, thereby driving the L-shaped positioning plate 35 or the positioning drive assembly 553 to rotate, so that the milling cutter disc 1 is driven to rotate to a predetermined angle. The first milling cutter 2, the second milling cutter 3 or the third milling cutter 13 of different types are adjusted as needed for milling use. When milling, the access tube 10 and the external debris collection device are connected to the access tube 10, and the milling debris is collected through the collection cover 12 to ensure the working environment and quality of milling.

[0036] When the present invention is used, the user first operates when the milling cutter needs to be replaced, and only needs to manually pull the rubber head 14. After the rubber head 14 is pulled, the clamping rod 30 is driven to move out of the sleeve 8. After the clamping rod 30 moves, it drives the chuck 29 to compress the limiting spring 28, thereby pulling the clamping rod 30 to separate from the through hole on the milling cutter disc 1. Then the user lifts the milling cutter disc 1, so that the L-shaped positioning plate 35 leaves the limiting clamping sleeve 7 and then removes the entire milling cutter disc 1. Then the user controls the external controller to control the small electric push rod 23 to shrink one end distance, and the small The push rod of the electric push rod 23 contracts and drives the pawl 25 to move, so that when the pawl 25 is pulled up, the reset spring 4 is extended. After the pawl 25 moves, it is separated from the ratchet wheel 24. Then the user rotates the twisting plate 31. After the twisting plate 31 rotates, it drives the rotating shaft 18 to rotate. After the rotating shaft 18 rotates, it drives the rotating drum 19 to rotate. When the rotating drum 19 rotates, it drives the traction rod 17 to move. After the traction rod 17 moves, it drives the limit slider 34 to slide in the limit slide groove 36. Under the sliding of the limit slider 34, the tough bending rod 15 is driven to pull the bending plate 21 to move. After the movement of the bent plate 21, the limiting card strip 32 is driven to move. After the movement, the limiting card strip 32 is pulled out from the first milling cutter 2, the second milling cutter 3 or the third milling cutter 13 and the cutter head mounting tube 20. Then, the user rotates one of the types of milling cutters to be maintained, thereby separating it from the threaded opening 26 and taking it out, which is conducive to the replacement of the milling cutter and convenient maintenance. Moreover, multiple types of milling cutters can be used at the same time to improve the milling effect. Then, the milling cutter is installed by reverse operation. The user controls the micro stepping motor 6 through the external controller. Open, and the micro stepper motor 6 drives the shaft 5 to rotate after operation. After the shaft 5 rotates, it drives the limit sleeve 7 to rotate, thereby driving the L-shaped positioning plate 35 or the positioning drive assembly 553 to rotate, so as to drive the milling cutter disc 1 to rotate to a predetermined angle. The first milling cutter 2, the second milling cutter 3 or the third milling cutter 13 of different models are adjusted as needed for milling. When milling, the access tube 10 and the external debris collection device are connected to the access tube 10, and the milling debris is collected through the collection cover 12 to ensure the working environment and quality of milling.

[0037] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A stepped composite milling cutter with a dust collecting cover and a cutter head assembly thereof, characterized in that: The invention comprises a milling cutter disc (1) and a load-bearing connecting plate (11), wherein a milling cutter mounting assembly (551) is interspersed on the outer surface of the milling cutter disc (1), wherein the milling cutter mounting assembly (551) comprises a plurality of cutter head mounting cylinders (20) arranged in an annular manner inside the milling cutter disc (1), and a threaded opening (26) opened on the inner wall of the cutter head mounting cylinder (20), wherein a first milling cutter (2), a second milling cutter (3) and a third milling cutter (13) are respectively arranged on the inner sides of the plurality of cutter head mounting cylinders (20), wherein the first milling cutter (2), the second milling cutter (3) and the third milling cutter (13) are arranged on the inner sides of the plurality of cutter head mounting cylinders (20), and wherein the first milling cutter (2), the second milling cutter (3) and the third milling cutter (13) are arranged on the inner sides of the plurality of cutter head mounting cylinders (20). The milling cutters (13) are respectively threadedly connected to the threaded openings (26); a support ring sleeve (16) is arranged inside the milling cutter disc (1); a plurality of cutter head mounting cylinders (20) are interlaced and fixedly arranged with the support ring sleeve (16); a collecting assembly (554) is arranged at the bottom end of the load-bearing connecting plate (11); the bottom end of the load-bearing connecting plate (11) is fixedly connected to the body connecting assembly (552); an anti-skid reinforcement assembly (555) is installed inside the milling cutter disc (1); and a milling cutter limiting assembly (556) is arranged inside the milling cutter disc (1); The collecting assembly (554) comprises a collecting cover (12) arranged at the bottom end of the load-bearing connecting plate (11), and an access pipe (10) inserted through one end of the load-bearing connecting plate (11), wherein the access pipe (10) is in communication with the collecting cover (12); The fuselage connection assembly (552) comprises two mounting plates (9) fixedly connected to the bottom end of the load-bearing connection plate (11), and a shaft (5) rotatably connected between the two mounting plates (9), wherein a micro-stepping motor (6) is fixedly mounted on one end of one of the mounting plates (9), and an output shaft of the micro-stepping motor (6) is fixedly connected to one of the shafts (5); The outer surfaces of the two shafts (5) are fixedly sleeved with limit sleeves (7), both ends of the milling cutter disc (1) are provided with L-shaped positioning plates (35) used in conjunction with the limit sleeves (7), and the two ends of the two limit sleeves (7) that are away from each other are fixedly connected with a positioning drive assembly (553); The positioning drive assembly (553) comprises two sleeves (8) fixedly connected to the ends away from the limiting clamping sleeve (7), a clamping rod (30) is movably arranged inside the sleeve (8), a clamping disc (29) is welded to the clamping rod (30) inside the sleeve (8), a limiting spring (28) matching the clamping disc (29) is sleeved on the clamping rod (30) inside the sleeve (8), a rubber head (14) is connected to the away sides of the two clamping rods (30), and through holes are arranged at both ends of the milling cutter disc (1), and the corresponding sides of the two clamping rods (30) pass through the limiting clamping sleeve (7) and correspond to the clamping rod (30).

2. A stepped composite milling cutter with a dust collecting cover and a cutter head assembly thereof according to claim 1, characterized in that: A rotating shaft (18) is rotatably mounted inside the milling cutter disc (1), a rotating drum (19) is fixedly mounted on the outer surface of the rotating shaft (18), a plurality of traction rods (17) are rotatably connected to the outer surface of the rotating drum (19) in an annular manner and at equal intervals, and one end of the rotating shaft (18) passes through the milling cutter disc (1) and is fixedly connected to a torsion disc (31).

3. A stepped composite milling cutter with a dust collecting cover and a cutter head assembly thereof according to claim 2, characterized in that: The outer surface of the support ring sleeve (16) is provided with a plurality of limiting sliding grooves (36) in an annular manner, a limiting sliding block (34) is slidably arranged inside the limiting sliding groove (36), and the other end of the traction rod (17) is rotatably connected to the limiting sliding block (34).

4. A stepped composite milling cutter with a dust collecting cover and a cutter head assembly thereof according to claim 3, characterized in that: The anti-skid reinforcement component (555) comprises a positioning plate (37) fixedly mounted inside the milling cutter disc (1), and a pawl (25) equidistantly mounted in an annular manner on one end of the positioning plate (37); one end of the pawl (25) is fixedly connected to a return spring (4); one end of the positioning plate (37) is equidistantly mounted in an annular manner on a plurality of limit blocks (22); a small electric push rod (23) movably connected to the pawl (25) is fixedly mounted in the middle of the limit block (22); a ratchet (24) is fixedly mounted on the outer surface of the rotating shaft (18); the ratchet (24) and the pawl (25) are used in conjunction with each other.

5. A stepped composite milling cutter with a dust collecting cover and a cutter head assembly thereof according to claim 4, characterized in that: The milling cutter limiting assembly (556) comprises a plurality of clip brackets (33) annularly fixedly mounted inside the milling cutter disc (1), and a limiting clip (32) slidably arranged inside the clip brackets (33), and a clip opening (27) is provided at one end of the cutter head mounting cylinder (20).

6. A stepped composite milling cutter with a dust collecting cover and a cutter head assembly thereof according to claim 5, characterized in that: Two tough bent rods (15) are fixedly connected to the outer surface of the limit sliding block (34), and one end of the two tough bent rods (15) is commonly connected to a bent plate (21) used in conjunction with the limit clamping strip (32).

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