A milling cutter for milling a rail

Abstract

The utility model discloses a milling cutter disc of milling rail, including disc body, tool rest and blade, disc body periphery even fixed multiple sets of tool rest, and tool rest installs multiple blades, and disc body back surface is equipped with first hole and second hole, and both around center axis interval and left and right symmetry arrangement, and the radial distance of first hole is less than second hole, and the diameter is less than second hole, front surface is equipped with dustproof brush subassembly, and the weight reduction hole is equipped with detachable dustproof cover, and is fixed through the limiting groove and fixed bolt, dustproof brush subassembly is installed through installation ring groove, installation clamps and installs, and the installation clamps are equipped with the accommodation cavity, and the inboard of installation ring groove is equipped with the annular stopper of annular avoidance groove, and disc body is connected tool rest through guide groove and connecting bolt, and the outside of guide groove is equipped with blocking bolt. This milling cutter disc gives consideration to weight reduction and structural rigidity, realizes comprehensive protection, and the connection is safe and reliable and convenient to maintain, effectively promotes the stability of milling and service life, and is suitable for the severe working condition of rail milling.

Description

Technical Field

[0001] This utility model relates to the field of milling cutter head technology, and in particular to a milling cutter head for milling railway tracks. Background Technology

[0002] As the core load-bearing component of rail transit systems, railway tracks endure repeated impacts and friction from train loads, as well as external environmental erosion over long periods. This makes them prone to wear, deformation, and cracks, necessitating milling for repair or refurbishment to ensure the safety and stability of rail transit operations. The milling cutter head, as a key actuator in rail milling equipment, directly affects milling accuracy, processing efficiency, and equipment lifespan.

[0003] In rail milling operations, milling cutter heads must meet several stringent requirements: Firstly, the high-speed rotating milling cutter head must be lightweight to reduce rotational inertia, improve machining response speed and energy efficiency, while ensuring sufficient structural rigidity to prevent vibration and deformation caused by uneven force during high-speed rotation, which would affect milling accuracy. Secondly, the milling process generates a large amount of dust, iron filings, and other debris, which can easily penetrate the connection parts and weight-reduction holes of the milling cutter head, causing wear, blockage, or corrosion of components and shortening the service life of the equipment. In addition, under high-frequency vibration conditions, the reliability of the connection of each component of the milling cutter head is crucial. It is necessary to prevent safety hazards such as loose bolts and component detachment, while also taking into account the convenience of assembly and maintenance to reduce operating costs.

[0004] However, existing rail milling cutter discs still have many shortcomings in structural design: most products lack weight-reduction holes, resulting in a large overall weight and increased rotational inertia. This not only reduces the response speed and energy efficiency of milling but also easily causes vibration due to excessive inertia during high-speed rotation, affecting milling accuracy. Furthermore, the lack of weight-reduction design makes the disc structure redundant, making it difficult to balance lightweight design with structural flexibility. Moreover, the lack of differentiated optimization for the stress characteristics of different areas of the disc further exacerbates the problem of uneven stress distribution during high-speed operation. The protection system design is inadequate; key connection points and installation areas lack comprehensive and effective protective structures, allowing milling dust and metal shavings to easily penetrate and contaminate the components. Due to contamination, wear, or jamming, some existing protective structures are partially arranged or fixed, resulting in limited protection and inconvenience for disassembly and maintenance. The safety and ease of maintenance of the connection structure are insufficient. The connection between the tool holder and the disc body is mostly fixed by simple bolts, lacking an effective anti-loosening limit structure. Under long-term high-frequency vibration, there is a risk of bolts loosening and slipping out. The installation and fixing methods of protective components such as dust brushes are complicated and inconvenient to disassemble, increasing the difficulty and cost of maintenance. In addition, the structural designs of existing milling cutter discs lack coordination and have not formed a systematic solution for the harsh working conditions of high dust, high vibration, and high wear in rail milling, resulting in insufficient overall working condition adaptability and long-term operational reliability, and limited service life. Utility Model Content

[0005] This utility model addresses the technical problems of existing rail milling cutter discs, such as large disc weight, large moment of inertia, easy vibration and reduced accuracy during high-speed operation due to the lack of weight-reduction holes, as well as imperfect protection system, insufficient safety and ease of maintenance of connection structure, and poor adaptability to working conditions. It provides a milling cutter disc that balances lightweight and structural rigidity, reliable protection, stable connection, and convenient maintenance, and is suitable for the harsh working conditions of rail milling.

[0006] This utility model provides the following technical solution: a milling cutter disc for milling railway tracks, comprising a disc body, a tool holder, and cutting blades. Multiple sets of tool holders are evenly distributed and fixed around the disc body. Multiple cutting blades are installed on the tool holders. Multiple weight-reducing holes are provided on the back of the disc body. The weight-reducing holes include several first holes and several second holes. The first holes are equally spaced around the central axis of the cutter disc, and the second holes are equally spaced around the central axis of the disc body. The first holes and the second holes are arranged symmetrically from left to right. The radial distance of the first holes is less than the radial distance of the second holes, and the diameter of the second holes is greater than the diameter of the first holes. A dustproof brush assembly is provided on the front of the cutter disc.

[0007] In some embodiments, a removable dust cover is installed on each weight reduction hole. A limiting groove is provided at the upper end of the weight reduction hole. The dust cover is placed on the limiting groove. A plurality of fixing holes are provided on the limiting groove. The plurality of fixing holes are arranged around the central axis of the weight reduction hole. Fixing bolts are provided in the fixing holes. The dust cover is fixed to the limiting groove by the fixing bolts.

[0008] In some embodiments, the dust brush assembly includes a plurality of mounting clips, in which a dust brush is installed. The front side of the disc body is provided with a mounting ring groove for mounting the dust brush. The mounting ring groove is arranged around the central axis of the disc body. Based on the surrounding arrangement of the mounting ring groove, the plurality of mounting clips are arranged around the central axis of the disc body accordingly.

[0009] In some embodiments, the mounting clip is provided with two positioning holes, and the disc body is provided with mounting holes corresponding to the positioning holes. The positioning holes and mounting holes are connected by positioning bolts.

[0010] In some embodiments, the mounting clip includes a receiving cavity inside, and one end of the dust brush is installed in the receiving cavity through the opening of the receiving cavity. The receiving cavity has two connecting holes, which correspond to two positioning holes respectively. The positioning bolt passes through the positioning hole, the connecting hole and the mounting hole in sequence. The opening of the receiving cavity is set to face outward.

[0011] In some embodiments, an annular stop is installed inside the mounting groove, the mounting groove and the annular stop are coaxially arranged, and the upper end face of the annular stop is higher than the end face of the disc body.

[0012] In some embodiments, an annular clearance groove is provided on the upper end face of the annular block, and the annular clearance groove is coaxially arranged with the annular block.

[0013] In some embodiments, the disc body is connected to the tool holder by connecting bolts. The disc body is provided with a guide groove for installing the connecting bolts. The bottom of the guide groove is provided with a through hole for the connecting bolts to pass through. A blocking bolt is provided at the outer end of the guide groove. When the connecting bolts loosen and slide out, the blocking bolt prevents the connecting bolts from sliding out further.

[0014] Compared with the prior art, the advantages of this utility model are:

[0015] I. Coordinated optimization of weight reduction and structural rigidity to improve milling stability: By symmetrically arranging the first and second holes and designing differentiated radial distances and diameters, the weight of the disc is effectively reduced while the structural strength requirements of different radial positions of the disc are reasonably matched. This reduces the moment of inertia to improve milling efficiency, and the symmetrical arrangement ensures balanced force on the disc, avoiding deformation caused by uneven force during high-speed rotation. It balances lightweight design and structural reliability, and solves the problem that existing milling cutter disc weight reduction designs are prone to causing insufficient rigidity or unstable rotation.

[0016] II. Comprehensive and improved protection system, extending equipment service life: On the one hand, the weight reduction hole is equipped with a detachable dust cover, which can effectively block dust, iron filings and other debris generated during milling from entering the hole, avoiding contamination, wear or blockage of the internal installation structure. The detachable design facilitates maintenance and cleaning, overcoming the defects of existing weight reduction holes that lack protection or whose protective structures are difficult to disassemble. On the other hand, the dust brush assembly, through the cooperation of the surrounding mounting ring groove and mounting clamp, achieves a uniform circumferential arrangement of the dust brush. Combined with the outward-facing cavity design, it accurately blocks debris splashed from the outside. The annular stop block forms a double protective barrier. The annular clearance groove on its upper end not only avoids component interference but also facilitates the discharge of debris, comprehensively protecting the connection parts and key structures of the disc and tool holder, and adapting to the harsh working conditions of high dust and high wear in rail milling.

[0017] III. Safe and reliable connection structure, improved maintenance convenience: The connection between the tool holder and the disc body adopts a guide groove and blocking bolt design. The guide groove facilitates the installation and positioning of the connecting bolt, and the blocking bolt can limit the connection if the connecting bolt is accidentally loosened, preventing it from sliding out completely and causing the tool holder to fall off, which significantly improves the safety of use. At the same time, the dust brush is fixed by the positioning bolt through the mounting clip, the connecting hole and the mounting hole. The dust cover, tool holder and other components are all detachable, which makes the assembly and disassembly operation simple and reduces the maintenance difficulty and operating cost of the equipment.

[0018] IV. Strong overall structural adaptability and excellent working condition adaptability: The structural design of each component forms a synergistic effect, the weight reduction structure optimizes rotation performance, the protective structure specifically solves the dust pollution problem, and the safety structure meets the connection reliability requirements under vibration conditions. It fully adapts to the comprehensive requirements of railway milling for equipment stability, protection and safety, and improves the long-term operational reliability of the milling cutter head under complex working conditions. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a structural principle diagram of the present invention from another angle;

[0022] Figure 3 This is a partially enlarged structural diagram of the disk body of this utility model;

[0023] Figure 4 This is a schematic diagram of the structure of the disc body of this utility model;

[0024] Figure 5 This is a schematic diagram showing the layout of the dustproof brush and the annular stop block of this utility model;

[0025] Figure 6 This is a schematic diagram of the structure of the annular stop block of this utility model;

[0026] Figure 7 This is a schematic diagram of the structure of the dustproof brush assembly of this utility model;

[0027] Figure 8 This is a schematic diagram of the mounting clip of this utility model;

[0028] Figure 9 This is a schematic diagram of the structure of the dustproof brush of this utility model.

[0029] In the diagram: 1. Disc body; 11. First hole; 12. Second hole; 13. Limiting groove; 14. Fixing hole; 15. Mounting ring groove; 16. Mounting hole; 17. Guide groove; 2. Tool holder; 3. Blade; 4. Dust brush assembly; 41. Mounting clamp; 42. Dust brush; 43. Positioning hole; 44. Receiving cavity; 45. Connecting hole; 5. Dust cover; 6. Fixing bolt; 7. Positioning bolt; 8. Connecting bolt; 9. Blocking bolt; 10. Annular stop; 101. Clearance groove. Detailed Implementation

[0030] The present application will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0031] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0032] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this application, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0033] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The drawings only show the components related to this application and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0034] Additionally, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that practice can be carried out without these specific details.

[0035] The technical solutions provided by the various embodiments of this application are described below with reference to the accompanying drawings.

[0036] Please see Figure 1-3As shown in this embodiment: a milling cutter disc for milling railway tracks includes a disc body 1, a tool holder 2, and cutting blades 3. Multiple sets of tool holders 2 are evenly distributed and fixed around the disc body 1. Multiple cutting blades 3 are installed on the tool holders 2. Multiple weight reduction holes are provided on the back of the disc body 1. The weight reduction holes include a number of first holes 11 and a number of second holes 12. The first holes 11 are equally spaced around the central axis of the cutter disc, and the second holes 12 are equally spaced around the central axis of the disc body 1. The first holes 11 and the second holes 12 are arranged symmetrically from left to right. The radial distance of the first holes 11 is less than the radial distance of the second holes 12, and the diameter of the second holes 12 is greater than the diameter of the first holes 11. A dustproof brush assembly 4 is provided on the front of the cutter disc.

[0037] The design employs a differentiated layout with the first hole 11 and the second hole 12 spaced equidistantly around the central axis and symmetrically arranged. Combined with precise matching of their radial distance and diameter, this effectively reduces weight and rotational inertia to improve milling response speed and energy efficiency, addressing the stress characteristics of different radial positions on the disc 1. The symmetrical arrangement ensures balanced stress during high-speed rotation, preventing vibration or deformation caused by insufficient local rigidity, thus balancing lightweight design and structural stability. Multiple sets of tool holders 2 and multiple inserts 3 evenly distributed around the disc 1 expand the milling coverage, resulting in more uniform stress on the rail machining surface, reducing concentrated local wear, and adapting to the milling and repair needs of different parts of the rail, improving processing quality and efficiency. The dustproof brush assembly 4 on the front of the cutter head specifically blocks dust, iron filings, and other debris generated during milling from spreading to the core connection area and weight-reduction holes of the disc 1, preventing debris from adhering to or intruding into critical structural gaps, reducing component wear, and providing reliable protection for the long-term stable operation of the milling cutter head under harsh dust conditions.

[0038] In some embodiments, such as Figure 3 As shown, each weight-reducing hole is equipped with a removable dust cover 5. A limiting groove 13 is provided at the upper end of the weight-reducing hole, and the dust cover 5 is placed on the limiting groove 13. Several fixing holes 14 are provided on the limiting groove 13, arranged around the central axis of the weight-reducing hole. Fixing bolts 6 are installed in the fixing holes 14, and the dust cover 5 is fixed to the limiting groove 13 by the fixing bolts 6. It should be noted that this effectively prevents dust, iron filings, and other debris generated during milling operations from entering the weight-reducing hole, avoiding contamination of the internal installation structure caused by the adhesion or accumulation of debris. The dust cover 5 is designed to prevent wear and tear, as well as blockage of the weight reduction holes, which can affect heat dissipation or structural stability of the disc body 1. The limiting groove 13 allows for quick positioning and installation of the dust cover 5, improving assembly efficiency. The surrounding fixed holes 14 ensure balanced force distribution on the dust cover 5, resulting in strong fixation reliability and suitability for high-speed rotation of the milling cutter disc. At the same time, the detachable design facilitates regular removal of the dust cover 5 for cleaning and maintenance of the weight reduction holes. This simple operation avoids the drawbacks of fixed protective structures, such as difficulty in cleaning and easy failure after long-term use, further extending the overall service life of the milling cutter disc.

[0039] In some embodiments, such as Figures 4-5 As shown, the dust brush assembly 4 includes several mounting clips 41, each housing a dust brush 42. The front of the disc body 1 has a mounting ring groove 15 for mounting the dust brush 42, which surrounds the central axis of the disc body 1. Based on the surrounding arrangement of the mounting ring groove 15, the mounting clips 41 are arranged around the central axis of the disc body 1. It should be noted that the mounting ring groove 15 provides a precise circumferential positioning reference for the mounting clips 41, ensuring that the multiple mounting clips 41 and the dust brush 42 are evenly distributed along the circumference of the disc body 1, forming a full-circumferential, no-dead-angle protective barrier that can comprehensively block milling products. Dust, iron filings, and other debris cannot penetrate the core connection area of ​​the disc body 1, preventing critical structures from being affected by debris adhesion or wear, thus ensuring operational stability. The surrounding arrangement design makes the relative position of the dustproof brush 42 more closely match the milling operation area, improving the targeting and effectiveness of debris blocking and adapting to the high-speed rotation characteristics of the milling cutter disc. At the same time, the mating structure of the mounting clip 41 and the mounting ring groove 15 simplifies the assembly and replacement process of the dustproof brush 42, facilitates later maintenance, and ensures reliable installation positioning, preventing the dustproof brush 42 from shifting or falling off under high-frequency vibration conditions, thus ensuring the long-term stable operation of the protective structure.

[0040] In some embodiments, such as Figures 4-9 As shown, the mounting clip 41 has two positioning holes 43, and the disc body 1 has mounting holes 16 corresponding to the positioning holes 43. The positioning holes 43 and the mounting holes 16 are connected by positioning bolts 7. It should be noted that the symmetrical arrangement of the two positioning holes 43 makes the positioning accuracy of the mounting clip 41 higher, effectively avoiding circumferential offset or tilting of the dust brush 42 after installation, ensuring the consistency of the relative position of the dust brush 42 and the working area, and ensuring the uniformity and reliability of the full circumferential protection. The connection method of the positioning bolts 7 has strong fastening, which can resist the high-speed rotation of the milling cutter disc and the high-frequency vibration generated by milling operations, preventing the mounting clip 41 and the dust brush 42 from loosening, displacement or even falling off, and improving the stability of the protective structure. At the same time, the detachable design of the bolt connection facilitates the disassembly, replacement and maintenance of the dust brush 42, which is simple and efficient, reduces the equipment maintenance cost, and the standardized hole position and bolt matching design improves the versatility of the components and the assembly efficiency.

[0041] In some embodiments, such as Figures 4-9As shown, the mounting clip 41 includes a receiving cavity 44. One end of the dustproof brush 42 is installed in the receiving cavity 44 through the opening of the receiving cavity 44. The end of the dustproof brush 42 receiving the receiving cavity 44 has two connecting holes 45, which correspond to two positioning holes 43 respectively. The positioning bolt 7 passes through the positioning hole 43, the connecting hole 45 and the mounting hole 16 in sequence. The opening of the receiving cavity 44 faces outward. It should be noted that the receiving cavity 44 provides stable installation support and circumferential limit for the dustproof brush 42, effectively preventing the dustproof brush 42 from radially shifting or shaking under high-frequency vibration or high-speed rotation conditions, ensuring accurate protection position; the opening faces outward. The design allows the working end of the dust brush 42 to directly face the direction of milling debris splash, improving the targeting and effectiveness of debris blocking, while preventing dust and iron filings from accumulating inside the receiving cavity 44, reducing cleaning difficulty; the through-type fixing of the positioning bolts 7 with the matching double positioning holes 43 and corresponding connecting holes 45 makes the dust brush 42, mounting clip 41 and disc body 1 form a stable connection, further enhancing the structure's vibration resistance and preventing parts from loosening and falling off; in addition, this assembly structure takes into account both the convenience of installation and the flexibility of disassembly, facilitating the regular replacement and maintenance of the dust brush 42, extending the service life of the protective components, and ensuring the long-term stable protective effect of the milling cutter disc.

[0042] In some embodiments, such as Figure 5 As shown, an annular stop 10 is installed inside the mounting groove 15. The mounting groove 15 and the annular stop 10 are coaxially arranged. The upper end face of the annular stop 10 is higher than the end face of the disc body 1. It should be noted that the annular stop 10 and the dust brush assembly 4 form a double protection structure. On the basis of the dust brush 42 blocking the splashed debris from the outside, it further blocks the intrusion of fine dust and iron filings that are not completely intercepted into the core connection area of ​​the disc body 1, significantly improving the comprehensiveness and reliability of the protection. The annular stop 10 is coaxial with the mounting groove 15. The layout ensures uniform and seamless circumferential protection, adapting to the high-speed rotation characteristics of the milling cutter head. Its upper surface, higher than the end face of the disc body 1, forms a physical barrier, altering the trajectory of flying debris and preventing direct adhesion or abrasion of critical structures such as the connection between the disc body 1 and the tool holder 2. Simultaneously, the coaxial structural design ensures balanced force distribution on the disc body 1, preventing additional protective components from affecting the stability of the milling cutter head during high-speed rotation. This adapts to the harsh working conditions of high dust and wear in rail milling, extending the overall service life of the milling cutter head.

[0043] In some embodiments, such as Figures 5-6As shown, an annular clearance groove 101 is provided on the upper surface of the annular stop 10. The annular clearance groove 101 and the annular stop 10 are coaxially arranged. It should be noted that the annular clearance groove 101 can effectively prevent interference between the disc 1 and the rail processing surface, splash debris or other components during the milling operation, leaving a reasonable space margin for the milling operation and ensuring the smoothness of the operation. The coaxial arrangement design ensures uniform and consistent circumferential clearance, does not affect the overall structural symmetry of the annular stop 10 and the force balance of the disc 1 when rotating at high speed, and avoids vibration or accuracy deviation caused by local structural differences. At the same time, the annular clearance groove 101 can guide fine dust and iron filings that are not completely intercepted to be discharged along the groove, reduce the accumulation of debris on the upper surface of the annular stop 10, reduce the risk of component wear, further optimize the protection effect, and improve the long-term operational reliability of the milling cutter disc under harsh working conditions in conjunction with the dual protection function of the annular stop 10.

[0044] In some embodiments, such as Figure 3 As shown, the disc body 1 is connected to the tool holder 2 via connecting bolts 8. The disc body 1 has a guide groove 17 for installing the connecting bolts 8. The bottom of the guide groove 17 has a through hole for the connecting bolts 8 to pass through. A blocking bolt 9 is located at the outer end of the guide groove 17. When the connecting bolts 8 loosen and slide out, the blocking bolt 9 prevents them from sliding out further. It should be noted that the guide groove 17 provides precise guidance and positioning for the installation of the connecting bolts 8, facilitating quick alignment of the installation position during assembly and improving assembly efficiency. The connecting bolts 8 pass through the through hole to achieve a stable connection between the disc body 1 and the tool holder 2. The structure ensures load-bearing capacity and adapts to the stress requirements of milling operations. The blocking bolt 9 forms a reliable anti-loosening limiting structure. Under long-term high-frequency vibration conditions, even if the connecting bolt 8 shows a tendency to loosen and slip out, it can be prevented from completely detaching by the physical blocking of the blocking bolt 9, effectively preventing safety accidents caused by the tool holder 2 falling off and significantly improving the safety of use. At the same time, this structural design does not increase the complexity of assembly and disassembly. The disassembly and assembly of the connecting bolt 8 can still be completed through the guide groove 17, making maintenance and operation convenient. It takes into account both connection reliability and maintenance practicality, and extends the service life of the milling cutter head.

[0045] The same or similar parts between the various embodiments in this specification can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments.

[0046] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A milling cutter disc for milling railway tracks, comprising a disc body (1), a tool holder (2), and cutting blades (3), wherein multiple sets of the tool holders (2) are uniformly distributed and fixed around the disc body (1), and multiple cutting blades (3) are mounted on the tool holders (2), characterized in that: The back of the disc (1) is provided with a plurality of weight-reducing holes, including a plurality of first holes (11) and a plurality of second holes (12). The first holes (11) are arranged at equal intervals around the central axis of the cutter disc, and the second holes (12) are arranged at equal intervals around the central axis of the disc (1). The first holes (11) and the second holes (12) are arranged symmetrically from left to right. The radial distance of the first holes (11) is less than the radial distance of the second holes (12), and the diameter of the second holes (12) is greater than the diameter of the first holes (11). The front of the cutter disc is provided with a dustproof brush assembly (4).

2. The milling cutter disc for milling railway rails according to claim 1, characterized in that: Each of the weight-reducing holes is equipped with a removable dust cover (5). A limiting groove (13) is provided at the upper end of the weight-reducing hole. The dust cover (5) is placed on the limiting groove (13). A plurality of fixing holes (14) are provided on the limiting groove (13). The plurality of fixing holes (14) are arranged around the central axis of the weight-reducing hole. Fixing bolts (6) are provided in the fixing holes (14). The dust cover (5) is fixed to the limiting groove (13) by the fixing bolts (6).

3. A milling cutter disc for milling railway tracks according to claim 1, characterized in that: The dustproof brush assembly (4) includes several mounting clips (41), and a dustproof brush (42) is installed in the mounting clips (41). The front of the disc body (1) is provided with a mounting ring groove (15) for installing the dustproof brush (42). The mounting ring groove (15) is arranged around the central axis of the disc body (1). Based on the surrounding arrangement of the mounting ring groove (15), the several mounting clips (41) are arranged around the central axis of the disc body (1).

4. A milling cutter disc for milling railway tracks according to claim 3, characterized in that: The mounting clip (41) is provided with two positioning holes (43), and the disc body (1) is provided with mounting holes (16) corresponding to the positioning holes (43). The positioning holes (43) and the mounting holes (16) are connected by positioning bolts (7).

5. A milling cutter disc for milling railway tracks according to claim 4, characterized in that: The mounting clip (41) includes a receiving cavity (44) inside. One end of the dust brush (42) is installed in the receiving cavity (44) through the opening of the receiving cavity (44). The dust brush (42) is provided with two connecting holes (45) at the receiving cavity (44) end. The two connecting holes (45) correspond to the two positioning holes (43) respectively. The positioning bolt (7) passes through the positioning hole (43), the connecting hole (45) and the mounting hole (16) in sequence. The opening of the receiving cavity (44) is set to face outward.

6. A milling cutter disc for milling railway tracks according to claim 3, characterized in that: An annular stop (10) is installed inside the mounting annular groove (15). The mounting annular groove (15) and the annular stop (10) are coaxially arranged. The upper end face of the annular stop (10) is higher than the end face of the disc body (1).

7. A milling cutter disc for milling railway tracks according to claim 6, characterized in that: The annular stop (10) has an annular clearance groove (101) on its upper surface, and the annular clearance groove (101) is coaxial with the annular stop (10).

8. A milling cutter disc for milling railway rails according to claim 1, characterized in that: The disc body (1) is connected to the tool holder (2) by connecting bolts (8). The disc body (1) is provided with a guide groove (17) for installing the connecting bolts (8). The bottom of the guide groove (17) is provided with a through hole for the connecting bolts (8) to pass through. The outer end of the guide groove (17) is provided with a blocking bolt (9). When the connecting bolts (8) loosen and slide out, the blocking bolts (9) prevent the connecting bolts (8) from continuing to slide out.

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