Cutter head

Abstract

A cutter head (1). The cutter head (1) comprises a body (10), the body (10) comprises a rear end (12) and a front end (13) for mounting a blade, and the rear end (12) is provided with a bolt mounting structure used for mounting fastening bolts (4). The bolt mounting structure comprises guide parts (171), limiting parts (172), and connecting parts (173). Each guide part (171) comprises a blind hole (174) used for guiding a bolt head (41) of a fastening bolt, each limiting part (172) comprises a limiting recess (176) and a through hole (177), the limiting recess (176) is used for limiting the fastening bolt (4), one end of the limiting recess (176) is in communication with the rear end (12), the other end of the limiting recess (176) is in communication with one end of the through hole (177), and the other end of the through hole (177) is in communication with the front end (13) of the cutter head. One end of each connecting part (173) is in communication with the corresponding guide part (171), and the other end of the connecting part (173) is in communication with the corresponding limiting recess (176). The bolt head (41) enters the guide part (171), passes through the connecting part (173) and moves to the limiting recess (176), and the bolt head (41) is fastened by means of the through hole (177). The cutter head allows for convenient mounting, and avoids interference between the bolts and the blade.

Description

cutterhead Technical Field

[0001] The present invention relates to the technical field of mechanical processing, in particular to a cutter head. Background Art

[0002] The rotary cutting method has been widely used in thread processing of screws, worms, lead screws and other parts. Compared with the general screw processing method, the processing efficiency and processing accuracy can be greatly improved.

[0003] A rotary cutting device typically consists of a blade and a cyclone cutter disc. The blade is screwed to the cyclone cutter disc, which is then directly bolted to the machine tool via fastening bolts. Since the cyclone cutter disc is mounted to the machine tool via fastening bolts, in conventional cyclone cutters, both the mounting screw heads of the fastening bolts and the blades are mounted on the front surface of the cutter disc. This makes it easy for the fastening bolts to interfere with the blades during installation. This interference is particularly pronounced when the blade is large and the cutter disc is small. Summary of the Invention

[0004] An object of the present invention is to provide a cutter disc that can be easily installed and avoids interference between bolts and blades.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A cutterhead includes a body, the body including a rear end and a front end for mounting a blade, the rear end being provided with a bolt mounting structure for mounting a bolt, the bolt mounting structure including:

[0007] An introduction portion, comprising a blind hole for introducing a screw head of the bolt;

[0008] a limiting portion, comprising a limiting groove and a through hole, wherein the limiting groove is used to limit the bolt, one end of the limiting groove is connected to the rear end, the other end of the limiting groove is connected to one end of the through hole, and the other end of the through hole is connected to the front end of the cutter disc; and

[0009] a connecting portion, one end of which is in communication with the introduction portion, and the other end of which is in communication with the limiting groove;

[0010] The screw head enters the introduction portion and moves to the limiting groove through the connecting portion, and is fastened through the through hole.

[0011] In one embodiment, the limiting groove includes a first receiving groove and a second receiving groove coaxially arranged with each other, the first receiving groove is used to receive the stud of the bolt, the second receiving groove is used to receive the screw head, the first receiving groove is connected to the rear end of the cutter disc and the second receiving groove, the diameter of the second receiving groove is larger than the diameter of the first receiving groove, the end face of the second receiving groove close to the first receiving groove is a constraint surface, and the constraint surface is limitedly abutted against the screw head.

[0012] In one embodiment, the diameter of the through hole is smaller than the diameter of the second receiving groove.

[0013] In one embodiment, the first receiving groove, the second receiving groove and the through hole are coaxially arranged.

[0014] In one embodiment, the front end is provided with a blade slot for accommodating the blade, and the blade slot is arranged away from the bolt mounting structure.

[0015] In one embodiment, in the direction of the central axis of the body, the distance between the blade slot and the bolt mounting structure is greater than or equal to 2 mm and less than or equal to 5 mm.

[0016] In one embodiment, the introduction portion is provided with an opening at an outer peripheral side of the cutter head, and the opening is used for the bolt to enter the blind hole.

[0017] In one embodiment, the depth of the opening is less than the depth of the blind hole, the width of the opening is less than or equal to the diameter of the blind hole, and the width of the opening is greater than the diameter of the screw head.

[0018] In one embodiment, in a direction along the central axis of the body, centers of the introduction portion, the connection portion, and the limiting portion are located on the same arc.

[0019] In one embodiment, the central angle of the arc is greater than 20 degrees and less than 35 degrees.

[0020] In one embodiment, the main body includes a large diameter portion and a small diameter portion that are stacked, the large diameter portion is located on the front end side, the small diameter portion is located on the rear end side, and the large diameter portion and the small diameter portion are coaxially arranged, the diameter of the large diameter portion is larger than the diameter of the small diameter portion, and the second receiving groove is opened in the large diameter portion.

[0021] It can be seen from the above technical solution that the present invention has at least the following advantages and positive effects: the cutter disc of the present invention realizes the installation and fixation of the bolts through the bolt installation structure, so the overall structure of the cutter disc is simple, unnecessary components can be eliminated, and complicated installation operations can be avoided.

[0022] Furthermore, the blades are mounted on the front face of the cutterhead. The bolts used to mount the cutterhead are located within the cutterhead through an inlet, and are secured in place by a retaining member. Therefore, the bolt heads do not occupy the front face of the cutterhead. Furthermore, since the bolt heads are embedded within the cutterhead, interference with the blades located on the front face is avoided, facilitating blade placement. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] FIG1 is a perspective view of a cutter head according to the present embodiment;

[0024] FIG2 is a perspective view of a cutter head according to another embodiment;

[0025] FIG3 is a schematic diagram of the front end surface of the cutter head shown in FIG1 ;

[0026] FIG4 is a perspective view of the cutter head shown in FIG1 flipped 180 degrees;

[0027] FIG5 is an exploded schematic diagram of the cutter head shown in FIG4 ;

[0028] FIG6 is a cross-sectional view of the cutter head shown in FIG4 along the CC direction;

[0029] FIG7 is a schematic diagram of the rear end surface of the cutter head shown in FIG1 ;

[0030] FIG8 is a perspective view of another embodiment of the cutter head shown in FIG4;

[0031] FIG9 is a cross-sectional view of the cutter head shown in FIG7 along the BB direction;

[0032] FIG10 is a perspective view of the cutter head shown in FIG9 with the cutter head partially flipped 180 degrees and bolted;

[0033] FIG11 is a perspective view of the cutter head portion shown in FIG10;

[0034] FIG12 is a schematic diagram of the cutter head shown in FIG7 after being installed with bolts;

[0035] FIG13 is a cross-sectional view of the cutter head shown in FIG7 along the AA direction;

[0036] FIG14 , FIG15 , and FIG16 are schematic diagrams showing the sequential changes in the bolt positions when the cutter head shown in FIG1 is being installed with the bolts.

[0037] The accompanying drawings are explained as follows: 1. Cutter disc; 2. Blade; 3. Screw; 4. Fastening bolt; 41. Screw head; 411. Outer end face; 412. Inner end face; Stud 42; 10. Main body; 11. Processing hole position; 12. Rear end; 121. Rear end face; 13. Front end; 131. Front end face; 14. Blade slot; 141. Screw hole; 15. Large diameter portion; 16. Small diameter portion; 17. Bolt mounting structure; 171. Introduction portion; 172. Limiting portion; 173. Connecting portion; 174. Blind hole; 175. Opening; 176. Limiting groove; 1761. First receiving groove; 1762. Second receiving groove; 1763. Constraint surface; 177. Through hole; 18. Interlayer. DETAILED DESCRIPTION

[0038] Typical embodiments embodying the features and advantages of the present invention are described in detail in the following description. It should be understood that the present invention is capable of various variations in different embodiments without departing from the scope of the present invention, and that the descriptions and illustrations herein are intended to be illustrative rather than limiting.

[0039] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present application, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0040] Referring to Figure 1, this application provides a cutterhead 1 for mounting blades 2. The cutterhead 1 is mounted on a machine tool, which uses the blades 2 mounted on the cutterhead 1 to perform rotary cutting of a workpiece. The cutterhead 1 can be a whirling milling cutterhead or other cutterhead capable of external diameter machining. Specifically, in this embodiment, the cutterhead 1 is described using a whirling milling cutterhead as an example.

[0041] The cutter disc 1 is roughly disc-shaped, and can be a circular disc. The cutter disc 1 is used to carry the blade 2. The material of the cutter disc 1 can be a steel with a higher hardness to ensure the service life of the cutter disc 1.

[0042] The cutter head 1 may include a body 10. A processing hole 11 may be formed at the center of the body 10. A workpiece to be processed may pass through the processing hole 11 and be processed by the blade. The blade 2 on the cutter head 1 then processes the outer surface of the workpiece to be processed.

[0043] The body 10 may include a rear end 12 and a front end 13. The rear end 12 is located at one end of the body 10, closer to the machine tool. The front end 13 is located at the other end of the body 10 relative to the rear end 12. The end surface of the body 10 at the front end 13 is the front end surface 131, and the end surface at the rear end 12 is the rear end surface 121.

[0044] The front end 13 is used to mount the blade 2. The front end 13 is provided with a blade slot 14 for accommodating the blade 2. The blade 2 is mounted in the blade slot 14. The shape of the blade slot 14 can be adapted to the shape of the blade 2. For example, the blade 2 can be triangular or elongated. Correspondingly, the shape of the blade slot 14 can be triangular or elongated.

[0045] There may be multiple blade slots 14. The multiple blade slots 14 are evenly distributed on the front face 131. The blade 2 is installed in the blade slot 14, and the blade 2 may slightly protrude from the front face 131. Specifically, in this embodiment, the blade 2 may be a triangular blade 2. The blade slot 14 is a triangular slot. The front face 131 of the body 10 is formed with six blade slots 14. The six blade slots 14 are evenly distributed on the front face 131.

[0046] As shown in FIG2 , in other embodiments, the blade 2 may also be in the form of an elongated strip. The blade slot 14 is an elongated strip. Nine blade slots 14 are formed on the front face 131 of the body 10 . The nine blade slots 14 are evenly distributed on the front face 131 .

[0047] Please refer to Figure 3, which shows a top view of the front face 131 of the cutter head 1 after the blade 2 is removed. A screw hole 141 is defined at the bottom of the blade slot 14. The blade 2 is secured to the screw hole 141 via a screw 3, stably securing the blade 2 within the blade slot 14. To ensure sufficient securing force on the blade 2, the depth of the screw hole 141 should meet the requirements for blade 2 installation.

[0048] Please refer to Figure 4, which is a perspective view of the cutter head 1 as viewed from the rear end face 121. The main body 10 includes a large-diameter portion 15 and a small-diameter portion 16, which are stacked. The large-diameter portion 15 is located at the front end 13. The small-diameter portion 16 is located at the rear end 12. The large-diameter portion 15 and the small-diameter portion 16 are coaxially arranged. The diameter of the large-diameter portion 15 is larger than that of the small-diameter portion 16.

[0049] A stepped structure is formed between the outer circumference of the large-diameter portion 15 and the outer circumference of the small-diameter portion 16. Correspondingly, a mounting slot compatible with this stepped structure is also provided on the machine tool. This stepped structure increases the contact area between the cutterhead 1 and the machine tool, thereby improving the stability of the cutterhead 1 and the machine tool.

[0050] Specifically, please refer to Figure 5, which is an exploded view of the cutterhead shown in Figure 1, the fastening bolts 4, and the body 10. The end surface of the large-diameter portion 15 serves as the front end face 131 of the cutterhead 1, which is used to define the blade slots 14. The end surface of the large-diameter portion 15 is larger than that of the small-diameter portion 16, facilitating the design and arrangement of the blade slots 14.

[0051] The cutterhead 1 is mounted on the machine tool via a fastening bolt 4. The fastening bolt 4 includes a screw head 41 and a stud 42. The screw head 41 of the fastening bolt 4 is fixedly connected to the cutterhead 1, and the stud 42 of the fastening bolt 4 is screwed onto the machine tool, thereby achieving a fixed connection between the cutterhead 1 and the machine tool.

[0052] Referring to Figure 4 , in this embodiment, the rear end 12 of the body 10 is provided with a bolt mounting structure 17 for mounting the fastening bolts 4. Multiple bolt mounting structures 17 may be provided, evenly distributed across the body 10. Specifically, three bolt mounting structures 17 may be provided. The three bolt mounting structures 17 ensure stable installation of the cutterhead 1 while also reducing the overall space occupied by the three bolt mounting structures 17.

[0053] The bolt mounting structure 17 is positioned away from the blade slot 14. The space between the blade slot 14 and the bolt mounting structure 17 does not overlap. Therefore, the screw hole 141 in the blade slot 14 for mounting the blade 2 does not interfere with the bolt mounting structure 17. The screw 3 installed in the screw hole 141 can provide sufficient tightening force to the blade 2, ensuring that the blade 2 can be stably mounted in the blade slot 14.

[0054] Specifically, in this embodiment, referring to FIG6 , the blade slots 14 and the bolt mounting structure 17 may partially overlap in space. Thus, a gap of a certain thickness exists between the overlapping portion of the blade slots 14 and the bolt mounting structure 17. This gap provides sufficient thickness to allow for the machining of screw holes 141 of sufficient depth, enabling the screws 3 to provide sufficient tightening force on the blades 2. Therefore, the blade slots 14 are distributed across the front end surface 131 of the cutter head 1, ensuring that the front end surface 131 has sufficient planar surface and spatial location, thereby achieving a uniform distribution of the blade slots 14.

[0055] Specifically, the distance between the blade slot 14 and the bolt mounting structure 17 can be greater than 2 mm and less than 5 mm. The distance between the blade slot 14 and the bolt mounting structure 17 can be 3 mm or 4 mm, etc. This provides sufficient thickness between the blade slot 14 and the bolt mounting structure 17, so that the depth of the screw hole 141 in the blade slot 14 can meet the installation requirements of the blade 2 and provide sufficient fastening force for the blade 2.

[0056] 7 is a schematic diagram of the rear end face 121 of the body 10. Specifically, in this embodiment, the bolt mounting structure 17 may include an introduction portion 171, a position limiting portion 172, and a connecting portion 173. The introduction portion 171 and the position limiting portion 172 are connected via the connecting portion 173.

[0057] Refer to Figure 4 , when looking directly at the rear end face 121 of the body 10. The introduction portion 171 is used to insert the screw head 41 of the fastening bolt 4. The introduction portion 171 may include a blind hole 174 for inserting the screw head 41 of the fastening bolt 4. The depth of the blind hole 174 may be less than the thickness of the body 10. Specifically, the depth of the blind hole 174 is greater than the thickness of the small diameter portion 16. The blind hole 174 extends downward from the rear end face 121, passes through the small diameter portion 16, and ends within the large diameter portion 15.

[0058] The blind hole 174 can be circular, which can fit the screw head 41 of the fastening bolt 4. In addition, the diameter of the circular blind hole 174 is larger than the diameter of the screw head 41, so that the screw head 41 can enter the blind hole 174. The circular blind hole 174 can cover the screw head 41 of the bolt so that it is embedded in the interior of the blind hole 174.

[0059] Referring again to Figure 5 , in this embodiment, the inlet portion 171 further defines an opening 175 on the outer periphery of the cutter head 1. This opening 175 allows the bolt to smoothly enter the blind hole 174. When viewed from the side of the cutter head 1, the opening 175 is rectangular in shape. The depth of the opening 175 is the length of the rectangle along the central axis of the body 10, and the width of the opening 175 is the length of the rectangle perpendicular to the central axis.

[0060] The depth of opening 175 is less than or equal to the depth of blind hole 174. The depth of blind hole 174 is greater than the thickness of small-diameter portion 16. Specifically, in this embodiment, the depth of opening 175 is less than the depth of blind hole 174, and thus opening 175 is formed on the outer circumference of small-diameter portion 16. The depth of opening 175 is relatively small to avoid significantly affecting the strength of cutter head 1.

[0061] The width of the opening 175 is smaller than or equal to the diameter of the blind hole 174. To avoid a larger width of the opening 175, the strength of the body 10 of the cutter head 1 at the blind hole 174 is greatly affected, thereby affecting the use of the entire cutter head 1.

[0062] The width of the opening 175 is greater than the diameter of the screw head 41, which is beneficial for the screw head 41 to smoothly enter the blind hole 174. The screw head 41 can enter the blind hole 174 from the opening 175, making the installation operation of the screw head 41 more convenient.

[0063] In other embodiments, as shown in FIG8 , the opening 175 can be omitted. Thus, the outer peripheral walls of the small-diameter portion 16 and the large-diameter portion 15 are continuous surfaces. The blind hole 174 is formed with an open end on the rear end surface 121 of the cutter head 1, allowing the bolt head 41 to directly enter the introduction portion 171 through the open end of the blind hole 174.

[0064] Referring to Figure 9 , the retaining portion 172 is used to securely retain the fastening bolt 4. Specifically, in this embodiment, the retaining portion 172 includes a retaining groove 176 and a through hole 177. One end of the retaining groove 176 communicates with the rear end surface 121, while the other end of the retaining groove 176 communicates with one end of the through hole 177. The other end of the through hole 177 communicates with the front end surface 131 of the cutter head 1.

[0065] The limiting groove 176 is used to limit the position of the fastening bolt 4. Specifically, in this embodiment, the end of the fastening bolt 4 with the screw head 41 is received in the limiting groove 176. The limiting groove 176 can be roughly T-shaped. The shape of the limiting groove 176 is adapted to the shape of the end of the bolt with the screw head 41.

[0066] Specifically, the limiting groove 176 includes a first receiving groove 1761 and a second receiving groove 1762, which are coaxially arranged with each other. Furthermore, the first receiving groove 1761, the second receiving groove 1762, and the through hole 177 are also coaxially arranged. The first receiving groove 1761 is used to accommodate the end of the stud 42 closest to the screw head 41. The second receiving groove 1762 is used to accommodate the screw head 41. The first receiving groove 1761 connects the rear end face 121 of the cutter head 1 with the second receiving groove 1762. The end of the stud 42, which is away from the screw head 41, extends beyond the rear end face 121 of the cutter head 1.

[0067] Please refer to Figures 10 and 11. In the axial direction of the fastening bolt 4, the screw head 41 includes an outer end face 411 and an inner end face 412 that are arranged opposite to each other. The inner end face 412 is arranged toward the stud 42. The inner end face 412 is annular. The diameter of the second receiving groove 1762 is larger than the diameter of the first receiving groove 1761. The end face of the second receiving groove 1762 close to the first receiving groove 1761 is a constraint surface 1763. The constraint surface 1763 is limitedly abutted against the inner end face of the screw head 41. The diameter of the second receiving groove 1762 is larger than the diameter of the screw head 41, which facilitates the screw head 41 to enter the second receiving groove 1762. In addition, the constraint surface 1763 is adapted to the inner end face of the screw head 41. It can be understood that the constraint surface 1763 can be a flat surface or a conical surface.

[0068] Specifically, in this embodiment, the restraining surface 1763 is disposed around the circumference of the second receiving groove 1762. The central angle of the annular restraining surface 1763 can be greater than 180 degrees. The restraining surface 1763 can be positioned against at least half of the inner end surface 412 of the screw head, ensuring that the screw head 41 can be stably restrained against the restraining surface 1763.

[0069] Fastening bolt 4 is located within retaining groove 176, with its screw head 41 facing the through-hole. Using a wrench, tighten fastening bolt 4 from the front end 13 of cutterhead 1 through through-hole 177, threading it toward the rear end 12 of cutterhead 1. Screw head 41 rests against restraining surface 1763, and the end of stud 42, distal from screw head 41, is securely screwed to the machine tool. Thus, the cutterhead 1 is directly locked to the corresponding interface of the machine tool through the combined action of fastening bolt 4 and retaining groove 176.

[0070] In the above-mentioned cutter disc 1, the blade 2 is installed in the blade groove 14 on the front end surface 131 of the cutter disc 1. The cutter disc 1 is fastened and screwed to the machine tool by the fastening bolt 4. The screw head 41 of the bolt used to install the cutter disc 1 enters the interior of the cutter disc 1 through the introduction portion 171 and is limited in the limit portion 172. Therefore, on the front end surface 131 of the above-mentioned cutter disc 1, the screw head 41 of the bolt does not occupy the layout area of ​​the front end surface 131. In addition, since the screw head 41 of the fastening bolt 4 is embedded in the cutter disc 1, it can also avoid the fastening bolt 4 from interfering with the blade 2 located on the front end surface 131, which facilitates the arrangement of the blade 2.

[0071] Specifically, in this embodiment, the second receiving groove 1762 is provided in the large diameter portion 15. The diameter of the second receiving groove 1762 is relatively large, and the diameter of the large diameter portion 15 is also relatively large. Providing the second receiving groove 1762 in the large diameter portion 15 can better ensure the strength of the cutter head 1 body 10.

[0072] In other embodiments, when the diameter of the cutter disc 1 is larger and the processing area is larger, the second receiving groove 1762 can also be opened in the small diameter portion 16, as long as the second receiving groove 1762 for limiting the screw head 41 can be formed while ensuring the strength of the cutter disc 1.

[0073] Specifically, in this embodiment, the diameter of the through hole 177 is smaller than the diameter of the second receiving groove 1762. The diameter of the through hole 177 is also smaller than the diameter of the screw head 41. The through hole 177 only needs to be able to pass through a tool such as a wrench to tighten the screw head 41. The smaller diameter of the through hole 177 can reduce the area occupied by the through hole 177 on the front end surface 131 of the cutter head 1, thereby providing more space for the layout of the blade 2. In addition, the diameter of the through hole 177 is smaller than the diameter of the screw head 41, which can prevent the fastening bolt 4 from falling out of the through hole 177.

[0074] When the cutter head 1 is installed, the through hole 177 is empty, and the fastening bolt 4 is staggered with the blade 2 so as not to interfere with the blade 2. This ensures that there is enough space on the front end surface 131 of the cutter head 1 for installing different blades 2.

[0075] Referring to Figure 12 , in this embodiment, connecting portion 173 is used to connect introduction portion 171 and stop portion 172 . One end of connecting portion 173 is connected to introduction portion 171, and the other end is connected to stop slot 176 . Screw head 41 enters introduction portion 171 and moves through connecting portion 173 to stop slot 176 .

[0076] After the end of the fastening bolt 4 with the screw head 41 enters the guide portion 171, the cutter head 1 is rotated to move along the connecting portion 173. After the corresponding installation angle, the end of the fastening bolt 4 with the screw head 41 reaches the stopper 172. The through hole 177 of the stopper 172 coincides with the central axis of the fastening bolt 4. Then, a wrench is inserted through the through hole 177 to tighten the fastening bolt 4, securing the cutter head 1 to the machine tool.

[0077] Specifically in this embodiment, please refer to Figure 12. When looking directly at the rear end face 121 of the cutter disc 1, the connecting portion 173 can be arc-shaped. Moreover, in the direction along the central axis of the main body 10, the center of the introduction portion 171, the center of the connecting portion 173, and the center of the limiting portion 172 are located on the same arc. Specifically, the central angle E corresponding to the arc is greater than 20 degrees and less than 35 degrees. The size of the central angle E corresponding to the arc corresponds to the size of the installation angle of the rotational installation of the cutter disc 1. The installation angle of the cutter disc 1 is greater than 20 degrees and less than 35 degrees, which can not only stably connect the fastening bolt 4 to the bolt mounting structure 17, but also facilitate manual rotation operation.

[0078] Please refer to FIG. 13 . The cross section of the connecting portion 173 may be T-shaped, so as to fit the end of the bolt with the screw head 41 so that the bolt can move smoothly along the connecting portion 173 .

[0079] When viewing the cutter head 1 from the side, the bottom surfaces of the connecting portion 173 can be located in the same plane. Specifically, in this embodiment, the depth of the connecting portion 173 is the same as the depth of the blind hole 174. The bottom surfaces of the connecting portion 173 and the bottom surfaces of the blind hole 174 can be located at the same height.

[0080] Specifically, in this embodiment, a gap exists between the blade slot 14 and the bolt mounting structure 17. An interlayer 18 is formed between the blade slot 14, the blind hole 174, and the connecting portion 173. The thickness of the interlayer 18 can be greater than 2 mm and less than 5 mm. Therefore, when the screw hole 141 is formed in the interlayer 18, the depth of the screw hole 141 can be greater than 2 mm and less than 5 mm, which satisfies the installation requirements of the blade 2.

[0081] During the installation of the cutter disc 1, the fastening bolt 4 is preliminarily pre-fixed on the machine tool. Referring to Figures 14 and 15, the rear end face 121 of the cutter disc 1 is directed toward the fastening bolt 4, and the screw head 41 of the fastening bolt 4 is aligned with the opening 175 and enters the introduction portion 171. Referring to Figure 16, the cutter disc 1 is rotated to drive the screw head 41 to move along the connecting portion 173 into the limiting portion 172. When one end of the fastening bolt 4 with the screw head 41 is limited in the limiting portion 172, use a wrench to rotate the screw head 41 at the through hole 177 until the fastening bolt 4 is fully tightened, thereby locking the cutter disc 1 to the machine tool.

[0082] During the removal of the cutterhead 1, it is only necessary to initially reverse the rotation of the fastening bolt 4 to loosen the screw head 41 of the fastening bolt 4 from the restraining surface 1763, allowing the screw head 41 to exit the stopper 172. The cutterhead 1 is then rotated in the opposite direction, allowing the screw head 41 to return along the connecting portion 173 to the guide portion 171. Finally, the cutterhead 1 is removed from the opening 175 of the guide portion 171, thereby separating the fastening bolt 4 from the cutterhead 1. Therefore, during the removal of the cutterhead 1, the fastening bolt 4 does not need to be completely removed from the machine tool, allowing for quick and easy removal of the cutterhead 1.

[0083] The above-mentioned cutter head 1 is fixed with bolts by means of the bolt mounting structure 17 , so the overall structure of the cutter head 1 is simple, redundant components can be eliminated, and complicated installation operations can be avoided.

[0084] Furthermore, the blade 2 is mounted on the front end face 131 of the cutterhead 1. The fastening bolt 4 for mounting the cutterhead is located within the cutterhead 1 through an inlet 171. Therefore, the screw head 41 of the fastening bolt 4 does not occupy the layout area of ​​the front end face 131 of the cutterhead 1. Furthermore, since the screw head 41 of the fastening bolt 4 is embedded within the cutterhead 1, interference between the fastening bolt 4 and the blade 2 located on the front end face 131 is avoided, facilitating the placement of the blade 2.

[0085] While the present invention has been described with reference to several exemplary embodiments, it should be understood that the terms used are intended to be illustrative and exemplary rather than restrictive. Since the present invention can be embodied in many forms without departing from the spirit or essence of the invention, it should be understood that the above-described embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope of the appended claims. All changes and modifications that fall within the scope of the claims or their equivalents are intended to be covered by the appended claims.

Claims

1. A cutter head, characterized in that: The invention comprises a body, wherein the body comprises a rear end and a front end for mounting a blade, the rear end is provided with a bolt mounting structure for mounting a bolt, and the bolt mounting structure comprises: An introduction portion, comprising a blind hole for introducing a screw head of the bolt; a limiting portion, comprising a limiting groove and a through hole, wherein the limiting groove is used to limit the bolt, one end of the limiting groove is connected to the rear end, the other end of the limiting groove is connected to one end of the through hole, and the other end of the through hole is connected to the front end of the cutter disc; and a connecting portion, one end of which is in communication with the introduction portion, and the other end of which is in communication with the limiting groove; The screw head enters the introduction portion and moves to the limiting groove through the connecting portion, and is fastened through the through hole.

2. The cutter head according to claim 1, characterized in that The limiting groove includes a first receiving groove and a second receiving groove coaxially arranged with each other, the first receiving groove is used to receive the stud of the bolt, and the second receiving groove is used to receive the screw head. The first receiving groove is connected to the rear end of the cutter disc and the second receiving groove, the diameter of the second receiving groove is larger than the diameter of the first receiving groove, and the end face of the second receiving groove close to the first receiving groove is a constraint surface, and the constraint surface is limitedly abutted against the screw head.

3. The cutter head according to claim 2, characterized in that The diameter of the through hole is smaller than the diameter of the second receiving groove.

4. The cutter head according to claim 2, characterized in that The first receiving groove, the second receiving groove and the through hole are coaxially arranged.

5. The cutter head according to claim 1, characterized in that The front end is provided with a blade slot for accommodating the blade, and the blade slot is arranged away from the bolt mounting structure.

6. The cutter head according to claim 5, characterized in that In the central axis direction of the body, the distance between the blade slot and the bolt mounting structure is greater than or equal to 2 mm and less than or equal to 5 mm.

7. The cutter head according to claim 1, characterized in that The introduction portion is provided with an opening at the outer peripheral side of the cutter head, and the opening is used for the bolt to enter the blind hole.

8. The cutter head according to claim 7, characterized in that The depth of the opening is smaller than the depth of the blind hole, the width of the opening is smaller than or equal to the diameter of the blind hole, and the width of the opening is larger than the diameter of the screw head.

9. The cutter head according to claim 1, characterized in that In a direction along the central axis of the body, centers of the introduction portion, the connection portion, and the limiting portion are located on the same arc.

10. The cutter head according to claim 9, characterized in that The central angle of the arc is greater than 20 degrees and less than 35 degrees.

11. The cutter head according to claim 2, characterized in that The main body includes a large diameter portion and a small diameter portion arranged in a stacked manner, the large diameter portion is located at the front end, the small diameter portion is located at the rear end, and the large diameter portion and the small diameter portion are coaxially arranged. The diameter of the large diameter portion is larger than the diameter of the small diameter portion, and the second receiving groove is opened in the large diameter portion.

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