Supporting device of finish-milling inner facing cutter

Abstract

The invention provides a supporting device of a finish-milling inner milling cutter disc, and relates to the technical field of milling machining, the supporting device comprises a frame assembly and a supporting assembly, and the supporting assembly comprises a first sub-supporting assembly and a second sub-supporting assembly; the first sub-supporting assembly is used for supporting the finish-milling inner milling cutter disc to enable the finish-milling inner milling cutter disc to be always located in the fixed plane, and the second sub-supporting assembly is used for limiting the finish-milling inner milling cutter disc and limiting the finish-milling inner milling cutter disc at a specific position in the fixed plane. The finish-milling inner milling cutter disc can freely rotate around a fixed axis in a fixed plane under the action of external force, so that the stability of cutter disc detection is ensured, vibration in the detection process is reduced, extra error interference is eliminated, and the measurement precision is remarkably enhanced; the detection efficiency is greatly improved; in addition, the supporting assembly is used for supporting and limiting the finish-milling inner milling cutter head near the periphery of the finish-milling inner milling cutter head, and detection of a cutter in the middle of the cutter head cannot be affected while stable supporting is achieved.

Description

Technical Field

[0001] The present application generally relates to the field of milling processing technology, and specifically relates to a support device for a fine milling inner milling cutter disc. Background Art

[0002] The machining accuracy of the crankshaft of an internal combustion engine directly affects the performance and reliability of the engine as it is the core component of the power system. In the field of crankshaft finishing, the precision milling internal milling cutter with complex structure has become a key tool for the machining of journals and webs due to its efficient cutting ability and high precision. However, the slight errors in the manufacturing and assembly process of the cutter (such as cutter body runout, blade installation deviation) will directly lead to problems such as chatter marks on the machined surface and dimensional deviation. Therefore, the manufacturing accuracy detection of precision milling internal milling cutter has become a top priority.

[0003] In the prior art, when testing the accuracy of a large milling cutter disc, the milling cutter disc is fixed on a large rotating machine tool, a dial indicator is used, and the machine tool chuck is manually moved slowly to achieve accuracy testing of each blade. This testing method is time-consuming and labor-intensive. At the same time, it is difficult for the machine tool to adapt to the geometric features of the complex cutter disc, resulting in unstable clamping or uneven force, which makes it easy to introduce additional vibration errors during measurement, thereby resulting in low measurement accuracy. Summary of the invention

[0004] In view of the above defects or deficiencies in the prior art, it is desired to provide a support device for a fine milling inner milling cutter disc that can solve the above technical problems.

[0005] The present application provides a support device for a fine milling inner milling cutter disc, comprising: a frame assembly having a mounting surface; A support assembly, the support assembly is arranged on the mounting surface and is used for mounting a fine milling inner milling cutter disc; The support assembly comprises a first sub-support assembly and a second sub-support assembly, wherein the first sub-support assembly is used to support the fine milling inner milling cutter disc so that the fine milling inner milling cutter disc is located in a fixed plane; and the second sub-support assembly is used to limit the position of the fine milling inner milling cutter disc in the fixed plane; The first sub-support assembly and the second sub-support assembly cooperate with each other so that the fine milling inner milling cutter disc can rotate around a fixed axis in the fixed plane under the action of an external force; the fixed axis is perpendicular to the fixed plane.

[0006] According to the technical solution provided by the present application, the fine milling internal milling cutter disc comprises: a cutter disc body and a cutter disc cylinder, the cutter disc body has a first plane, the first plane is arranged close to the mounting surface, and the cutter disc cylinder is arranged on the first plane; The first sub-support assembly includes a plurality of first support structures; the plurality of first support structures are circumferentially arranged on the mounting surface, the first support structures are used to support the cutter head body along a first direction and to be in rolling contact with the first plane; the first direction is parallel to the fixed axis direction; The second sub-support assembly includes at least two second support structures; the second support structure supports the cutter disc cylinder along a second direction and is in rolling contact with the outer circumferential surface of the cutter disc cylinder; the second direction is parallel to the fixed plane.

[0007] According to the technical solution provided in the present application, there are three first support structures, two of which are arranged close to the top of the mounting surface, and another first support structure is arranged close to the bottom of the mounting surface, and the three first support structures are arranged in an isosceles triangle.

[0008] According to the technical solution provided in this application, the first supporting structure includes: A first welding block, wherein the first welding block is fixedly arranged on the mounting surface; a first bearing block is arranged on a side of the first welding block close to the fine milling inner milling cutter disc; At least one first bearing, the inner ring of the first bearing is mounted on the first bearing block, the axis of the first bearing extends radially along the fine milling inner milling cutter disc, and the outer ring circumference of the first bearing is in rolling contact with the first plane.

[0009] According to the technical solution provided in this application, the second supporting structure includes: A second welding block, the second welding block is fixedly arranged on the mounting surface; a second bearing block is arranged on one side of the second welding block close to the fine milling inner milling cutter disc; At least one second bearing, the inner ring of the second bearing is mounted on the second bearing block, and the axial direction of the second bearing extends along the axial direction of the fine milling inner milling cutter disc, and the outer ring circumference of the second bearing is in rolling contact with the outer circumference of the cutter disc cylinder.

[0010] According to the technical solution provided in the present application, a plurality of limit assemblies are also arranged on the mounting surface, and the limit assemblies are used to limit the position of the finishing inner milling cutter disc along the first direction from the side of the finishing inner milling cutter disc away from the mounting surface to prevent the finishing inner milling cutter disc from falling.

[0011] According to the technical solution provided in the present application, three limit assemblies are provided, two of which are provided close to the bottom of the mounting surface, and another limit assemblies is provided close to the top of the mounting surface, and the three limit assemblies are arranged in an isosceles triangle.

[0012] According to the technical solution provided in this application, the limit assembly includes: a third welding block, the third welding block being fixedly disposed on the mounting surface; A limit block is arranged on a side of the third welding block away from the mounting surface, one end of the limit block extends to a side of the cutter disc body away from the mounting surface, and a gap is formed between the limit block and the cutter disc body.

[0013] According to the technical solution provided by this application, the framework assembly includes: A bottom plate, wherein two ribs are arranged on the top of the bottom plate in a horizontal direction, and one side corresponding to the two ribs has an inclined surface; A main board is arranged on the top of the bottom plate, and one side of the main board is fixedly connected to the inclined surface, and the side of the main board away from the inclined surface is the mounting surface.

[0014] According to the technical solution provided in the present application, movable wheels are arranged at the four bottom corners of the bottom plate.

[0015] The beneficial effects of this application are: The present application provides a support device for a fine milling inner milling cutter disc, comprising: a frame assembly and a support assembly, wherein the frame assembly has a mounting surface, and the support assembly is arranged on the mounting surface for mounting the fine milling inner milling cutter disc; the support assembly comprises a first sub-support assembly and a second sub-support assembly, and by arranging the first sub-support assembly, it can support the fine milling inner milling cutter disc so that it is always located in a fixed plane, and by arranging the second sub-support assembly, it can limit the fine milling inner milling cutter disc and restrict it to a specific position in the fixed plane. The present application uses the first sub-support assembly and the second sub-support assembly in coordination, so that the fine milling inner milling cutter disc can rotate freely around a fixed axis in a fixed plane under the action of an external force, thereby ensuring the stability of the cutter disc detection, reducing vibration during the detection process, eliminating additional error interference, and significantly enhancing the measurement accuracy; and the present application changes the detection method in the prior art that relies on large rotary machine tools and manual slow-speed moving machine tool chucks, and greatly improves the detection efficiency; in addition, the support assembly supports and limits the fine milling inner milling cutter disc near its outer periphery, and while providing stable support, it will not affect the detection of the tool in the middle of the cutter disc. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings: Figure 1 It is a schematic diagram of a support device for a fine milling inner milling cutter disc provided in the present application; Figure 2 It is a rear view of a support device for a fine milling inner milling cutter disc provided in the present application; Figure 3 is a schematic diagram of a first welding block provided in the present application; Figure 4 is a schematic diagram of a first bearing block provided in the present application; Figure 5 is a schematic diagram of a second welding block provided by the present application; Figure 6 is a schematic diagram of a second bearing block provided by the present application; Figure 7 is a schematic diagram of a third bearing block provided in the present application; Figure 8 It is a schematic diagram of the fine milling inner milling cutter disc provided in this application.

[0017] In the figure: 1. bottom plate; 2. main board; 21. mounting surface; 3. rib plate; 4. moving wheel; 5. first supporting structure; 51. first welding block; 52. first bearing block; 53. first supporting shaft; 54. first bearing; 6. second supporting structure; 61. second welding block; 62. second bearing block; 63. second supporting shaft; 64. second bearing; 7. limiting assembly; 71. third welding block; 72. limiting block; 8. fine milling inner milling cutter disc; 81. bolt hole; 82. first plane; 83. cutter disc cylinder; 9. lifting hole. DETAILED DESCRIPTION

[0018] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant invention, rather than to limit the invention. It is also necessary to explain that, for ease of description, only the parts related to the invention are shown in the accompanying drawings.

[0019] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0020] Example 1 Please refer to Figure 1-Figure 8 The present application provides a support device for a fine milling inner milling cutter disc, comprising: A frame assembly, the frame assembly having a mounting surface 21; A support assembly, which is arranged on the mounting surface 21 and is used for mounting the fine milling inner milling cutter disc 8; The support assembly includes a first sub-support assembly and a second sub-support assembly, the first sub-support assembly is used to support the fine milling inner milling cutter disc 8 so that the fine milling inner milling cutter disc 8 is located in a fixed plane; the second sub-support assembly is used to limit the position of the fine milling inner milling cutter disc 8 in the fixed plane; The first sub-support assembly and the second sub-support assembly cooperate together so that the fine milling inner milling cutter disc 8 can rotate around a fixed axis in a fixed plane under the action of an external force; the fixed axis is perpendicular to the fixed plane.

[0021] Specifically, in this embodiment, if Figure 8 As shown, the cutter disc body is annular in structure, the cutter disc body has an inner ring, and the blades are circumferentially surrounded on the inner ring; since the blades of the present application are surrounded on the inner ring of the cutter disc body, when performing blade inspection, it is necessary to support the cutter disc body to allow it to rotate stably and freely, and to avoid the blades in the middle of the cutter disc, so the conventional support and rotation method is not suitable for the fine milling inner milling cutter disc of the present application; Working principle: This application uses the first sub-support component in conjunction with the second sub-support component, so that the fine milling inner milling cutter disc can rotate freely around a fixed axis in a fixed plane under the action of external force, thereby ensuring the stability of the cutter disc detection, reducing vibration during the detection process, eliminating additional error interference, and significantly enhancing measurement accuracy; and this application changes the detection method of the prior art that relies on large rotary machine tools and manual slow-speed movement of machine tool chucks, greatly improving the detection efficiency; in addition, the support component supports and limits the fine milling inner milling cutter disc near its outer periphery, and while providing stable support, it will not affect the detection of the tool in the middle of the cutter disc.

[0022] In some embodiments, the fine milling inner milling cutter disc 8 comprises: a cutter disc body and a cutter disc cylinder 83, the cutter disc body having a first plane 82, the first plane 82 being arranged close to the mounting surface 21, and the cutter disc cylinder 83 being arranged on the first plane 82; The first sub-support assembly includes a plurality of first support structures 5; the plurality of first support structures 5 are circumferentially arranged on the mounting surface 21, the first support structures 5 are used to support the cutter body along a first direction and to roll in contact with the first plane 82; the first direction is parallel to the fixed axis direction; The second sub-support assembly includes at least two second support structures 6; the second support structure 6 supports the cutter disc cylinder 83 along the second direction and is in rolling contact with the outer circumference of the cutter disc cylinder 83; the second direction is parallel to the fixed plane.

[0023] Specifically, in the present embodiment, a plurality of first support structures 5 are circumferentially arranged on the mounting surface 21. Such circumferentially distributed design can ensure the support force provided to the cutter disc body so as to stably support the cutter disc body. At the same time, a plurality of second support structures 6 are also arranged. The plurality of second support structures 6 are arranged on the mounting surface 21 and close to the bottom of the mounting surface 21. This layout design fully considers the distribution of the center of gravity of the cutter disc cylinder 83, so that it is in rolling contact with the outer circumferential surface of the cutter disc cylinder 83. While supporting the cutter disc cylinder 83, it can effectively reduce the rotational resistance and ensure the smoothness and stability of the cutter disc rotation. Through the coordinated cooperation of the first support structure 5 and the second support structure 6, not only the reliable support of the precision milling inner milling cutter disc 8 is achieved, but also the necessary conditions for its free rotation during the detection process are provided, thereby improving the detection accuracy and efficiency.

[0024] In some embodiments, there are three first support structures 5, two of which are disposed near the top of the mounting surface 21, and another first support structure 5 is disposed near the bottom of the mounting surface 21, and the three first support structures 5 are arranged in an isosceles triangle.

[0025] Specifically, Figure 1 As shown, three first support structures 5 are provided in the present embodiment, wherein two first support structures 5 are provided close to the top of the mounting surface 21, and the other first support structure 5 is provided close to the bottom of the mounting surface 21, and an isosceles triangle arrangement pattern is formed between the three; the isosceles triangle arrangement can effectively disperse the pressure borne by the cutter disc body, thereby ensuring that the cutter disc body is subjected to uniform force during the detection process, and avoiding tilting or deformation caused by improper distribution of support points; this layout not only enhances the overall stability of the support device, but also can significantly reduce the measurement error caused by uneven force, thereby improving the detection accuracy and reliability; through this structural design, it can better adapt to the various working conditions during the detection of the fine milling internal milling cutter disc 8, build a reliable support system for the cutter disc body, effectively improve the efficiency and quality of the entire detection process, and effectively meet the stringent requirements of high-precision detection of the fine milling internal milling cutter disc 8.

[0026] In some embodiments, the first support structure 5 comprises: A first welding block 51, the first welding block 51 is fixedly arranged on the mounting surface 21; a first bearing block 52 is arranged on one side of the first welding block 51 close to the fine milling inner milling cutter disc 8; At least one first bearing 54 is provided, the inner ring of the first bearing 54 is mounted on the first bearing block 52 , and the axis of the first bearing 54 extends radially along the fine milling inner milling cutter disc 8 , and the outer ring circumference of the first bearing 54 is in rolling contact with the first plane 82 .

[0027] Specifically, the first supporting structure 5 includes: a first welding block 51, a first bearing block 52 and a first bearing 54; Among them: Figure 3 As shown, the first welding block 51 is an L-shaped structure, and the first welding block 51 is welded on the mounting surface 21 to ensure that the position is always stable during the detection process without displacement or looseness; and the first welding block 51 has a first placement surface, and the first placement surface is arranged toward the fine milling inner milling cutter disc 8; like Figure 4 As shown, the first bearing block 52 is fixedly mounted on the first placement surface by bolts, and the first bearing block 52 has a first support shaft 53, and the axial direction of the first support shaft 53 extends along the radial direction of the fine milling inner milling cutter disc 8; The first bearing 54 is fixedly connected to the first support shaft 53, and the axis of the first bearing 54 extends radially along the fine milling inner milling cutter disc 8; in the present embodiment, the first bearing 54 is a ball bearing; since a plurality of bolt holes 81 are circumferentially arranged on the first plane 82 of the cutter disc body, in order to prevent the first bearing 54 from being stuck in the bolt hole 81 during the rotation of the fine milling inner milling cutter disc 8; in the present embodiment, two first bearings 54 are provided, and the two first bearings 54 are arranged along the axial direction of the first support shaft 53, and the two first bearings 54 increase the supporting contact area with the first plane 82, so as to prevent the first bearing 54 from being stuck in the bolt hole 81 during the rotation of the fine milling inner milling cutter disc 8; at the same time, in the present embodiment, the number of the first bearings 54 can be changed to adapt to fine milling inner milling cutter discs 8 of different diameter specifications, thereby improving the versatility of the detection device.

[0028] In some embodiments, there are two second supporting structures 6 , both of which are disposed close to the bottom of the mounting surface 21 , and the two second supporting structures 6 are located on both sides of the first supporting structure 5 at the bottom.

[0029] Specifically, two second support structures 6 are provided. Such a number is set to ensure the support stability while avoiding the structural complexity caused by too many support points; the two second support structures 6 are both arranged near the bottom of the mounting surface 21 to provide stable support for the lower part of the cutter disc cylinder 83, effectively bear the weight of the cutter disc, and ensure the overall stability of the cutter disc; Specifically, in the present embodiment, the two second supporting structures 6 are located on both sides of the first supporting structure 5 at the bottom. This layout makes the supporting force distribution more uniform. When the fine milling inner milling cutter disc 8 rotates around the axis during detection, the first supporting structure 5 at the bottom and the second supporting structures 6 on both sides form a stable triangular supporting area, which conforms to the principle of mechanical stability and can effectively prevent the cutter disc from shaking or shifting when it rotates. Such a design not only significantly improves the supporting effect of the support device on the cutter disc, but also greatly reduces the detection error caused by unstable support, effectively improves the detection accuracy and reliability, and ensures that the detection work of the fine milling inner milling cutter disc 8 can be carried out accurately and efficiently, providing a strong guarantee for the subsequent processing quality.

[0030] In some embodiments, the second support structure 6 comprises: A second welding block 61, the second welding block 61 is fixedly arranged on the mounting surface 21; a second bearing block 62 is arranged on one side of the second welding block 61 close to the fine milling inner milling cutter disc 8; At least one second bearing 64, the inner ring of the second bearing 64 is installed on the second bearing block 62, and the axial direction of the second bearing 64 extends along the axial direction of the fine milling inner milling cutter disc 8, and the outer ring circumference of the second bearing 64 is in rolling contact with the outer circumference of the cutter disc cylinder 83.

[0031] Specifically, the second support structure 6 includes: a second welding block 61, a second bearing block 62 and a second bearing 64; Among them: Figure 5 As shown, the second welding block 61 is welded on the mounting surface 21 to ensure that the position remains stable during the detection process without displacement or loosening; a second placement surface is provided on the side of the first welding block 51 away from the mounting surface 21; like Figure 6 As shown, the second bearing block 62 is fixedly mounted on the second placement surface by bolts, and the second bearing block 62 has a second support shaft 63, and the axial direction of the second support shaft 63 extends along the axial direction of the fine milling inner milling cutter disc 8; The second bearing 64 is fixedly connected to the second support shaft 63, and the axis of the second bearing 64 extends along the axial direction of the fine milling inner milling cutter disc 8; in the present embodiment, the second bearing 64 is provided with one, and the second bearing 64 is a ball bearing; the second bearing 64 is in rolling contact with the outer circumferential surface of the cutter disc cylinder 83, and during the detection process, it can smoothly cooperate with the rotation of the cutter disc, reduce resistance, ensure the stability of the cutter disc rotation, and thus improve the accuracy and efficiency of the detection.

[0032] In some embodiments, a plurality of limit assemblies 7 are further provided on the mounting surface 21, and the limit assemblies 7 are used to limit the position of the finishing inner milling cutter disc 8 along the first direction from the side of the finishing inner milling cutter disc 8 away from the mounting surface 21 to prevent the finishing inner milling cutter disc 8 from falling.

[0033] Specifically, a plurality of limit assemblies 7 are also provided on the mounting surface 21, and the limit assemblies 7 are used to limit the position of the fine milling inner milling cutter disc 8 along the first direction from the side of the fine milling inner milling cutter disc 8 away from the mounting surface 21, so as to prevent the fine milling inner milling cutter disc 8 from falling and reduce safety hazards.

[0034] In some embodiments, three limit assemblies 7 are provided, wherein two limit assemblies 7 are provided near the bottom of the mounting surface 21 , and another limit assemblies 7 is provided near the top of the mounting surface 21 , and the three limit assemblies 7 are arranged in an isosceles triangle.

[0035] Specifically, Figure 1 As shown, there are three limit components 7, and this number can ensure the limit effect without making the structure too complicated; two of the limit components 7 are arranged close to the bottom of the mounting surface 21, and the other is arranged close to the top of the mounting surface 21, and the three limit components 7 are arranged in an isosceles triangle, which cooperate with each other to jointly build a stable limit protection system to prevent the fine milling inner milling cutter disc 8 from falling during measurement rotation, thereby enhancing the safety and reliability of the detection process.

[0036] In some embodiments, the limiting assembly 7 includes: A third welding block 71, the third welding block 71 is fixedly disposed on the mounting surface 21; The limit block 72 is arranged on a side of the third welding block 71 away from the mounting surface 21 , one end of the limit block 72 extends to a side of the cutter disc body away from the mounting surface 21 , and there is a gap between the limit block 72 and the cutter disc body.

[0037] Specifically, Figure 7 As shown, the limit assembly 7 includes: a third welding block 71 and a limit block 72, the third welding block 71 is welded on the mounting surface 21 to ensure that the position is always stable during the detection process without displacement or loosening; the limit block 72 is arranged on the side of the third welding block 71 away from the mounting surface 21, and the third welding block 71 and the limit block 72 are detachably connected by bolts; when it is necessary to detect the fine milling inner milling cutter disc 8, the limit block 72 is separated from the third welding block 71, and the fine milling inner milling cutter disc 8 is placed on the first supporting structure 5 and the second supporting structure 6. After ensuring the stability of the position of the fine milling inner milling cutter disc 8, the limit block 72 is connected to the third welding block 71, and at this time, one end of the limit block 72 extends to the side of the cutter disc body away from the mounting surface 21, and there is a gap between the limit block 72 and the cutter disc body, thereby preventing the fine milling inner milling cutter disc 8 from falling during measurement rotation, thereby enhancing the safety and reliability of the detection process.

[0038] In certain embodiments, the frame assembly includes: A bottom plate 1, two ribs 3 are arranged on the top of the bottom plate 1 in a horizontal direction, and one side corresponding to the two ribs 3 has an inclined surface; The main board 2 is arranged on the top of the bottom plate 1 , and one side of the main board 2 is fixedly connected to the inclined surface, and the side of the main board 2 away from the inclined surface is a mounting surface 21 .

[0039] Specifically, the frame assembly includes: a bottom plate 1, two ribs 3 are arranged in a horizontal direction on the top of the bottom plate 1, and the same side of the two ribs 3 has an inclined surface, and the inclined angles of the inclined surfaces of the two ribs 3 are kept the same to ensure the symmetry and mechanical balance of the structure; a main board 2 is also arranged on the top of the bottom plate 1, and one side of the main board 2 is fixedly connected to the inclined surface, so that the main board 2 forms a specific inclined angle, thereby reducing the risk of it falling due to gravity or external force during the measurement rotation process, and improving the safety and stability of the detection process; Specifically, in this embodiment, two hoisting holes 9 are further provided on the main board 2, and the hoisting holes 9 can be used for hoisting when the detection device is moved.

[0040] In some embodiments, moving wheels 4 are disposed at the four bottom corners of the bottom plate 1 .

[0041] Specifically, movable wheels 4 are provided at the four corners of the bottom of the base plate 1, preferably universal wheels with braking function; the setting of the movable wheels 4 makes the entire frame assembly easy to move, and in actual usage scenarios, the operator can easily push the device to flexibly adjust its position in the workshop to meet the usage requirements of different detection areas or equipment; when the device needs to be fixed, the movable wheels 4 can be quickly locked through the brake structure to prevent them from accidentally sliding, thereby ensuring the stability of the device during the fine milling inner milling cutter disc 8 detection process, taking into account the flexibility of the device and the reliability during fixation, and further improving the convenience and practicality of the support device in actual applications.

[0042] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with (but not limited to) technical features with similar functions disclosed in the present application.

Claims

1. A support device for a fine milling inner milling cutter disc, characterized in that: include: A frame assembly having a mounting surface (21); A support assembly, the support assembly being arranged on the mounting surface (21) and being used for mounting a fine milling inner milling cutter disc (8); The support assembly comprises a first sub-support assembly and a second sub-support assembly, the first sub-support assembly being used to support the fine milling inner milling cutter disc (8) so that the fine milling inner milling cutter disc (8) is located in a fixed plane; the second sub-support assembly being used to limit the position of the fine milling inner milling cutter disc (8) in the fixed plane; The first sub-support assembly and the second sub-support assembly cooperate together so that the fine milling inner milling cutter disc (8) can rotate around a fixed axis in the fixed plane under the action of an external force; the fixed axis is perpendicular to the fixed plane.

2. A support device for a fine milling inner milling cutter disc according to claim 1, characterized in that: The fine milling inner milling cutter disc (8) comprises: a cutter disc body and a cutter disc cylinder (83); the cutter disc body has a first plane (82); the first plane (82) is arranged close to the mounting surface (21); and the cutter disc cylinder (83) is arranged on the first plane (82); The first sub-support assembly comprises a plurality of first support structures (5); the plurality of first support structures (5) are circumferentially arranged on the mounting surface (21); the first support structures (5) are used to support the cutter head body along a first direction and to be in rolling contact with the first plane (82); the first direction is parallel to the fixed axis direction; The second sub-support assembly comprises at least two second support structures (6); the second support structure (6) supports the cutter disc cylinder (83) along a second direction and is in rolling contact with the outer peripheral surface of the cutter disc cylinder (83); the second direction is parallel to the fixed plane.

3. The support device for the fine milling inner milling cutter disc according to claim 2, characterized in that: There are three first support structures (5), two of which are arranged close to the top of the mounting surface (21), another of which is arranged close to the bottom of the mounting surface (21), and the three first support structures (5) are arranged in an isosceles triangle.

4. The support device for the fine milling inner milling cutter disc according to claim 2, characterized in that: The first supporting structure (5) comprises: A first welding block (51), the first welding block (51) being fixedly arranged on the mounting surface (21); a first bearing block (52) is arranged on a side of the first welding block (51) close to the fine milling inner milling cutter disc (8); At least one first bearing (54), the inner ring of the first bearing (54) is mounted on the first bearing block (52), the axis of the first bearing (54) extends along the radial direction of the fine milling inner milling cutter disc (8), and the outer ring circumference of the first bearing (54) is in rolling contact with the first plane (82).

5. The support device for the fine milling inner milling cutter disc according to claim 2, characterized in that: The second supporting structure (6) comprises: a second welding block (61), the second welding block (61) being fixedly arranged on the mounting surface (21); a second bearing block (62) being arranged on a side of the second welding block (61) close to the fine milling inner milling cutter disc (8); At least one second bearing (64), the inner ring of the second bearing (64) is mounted on the second bearing block (62), the axial direction of the second bearing (64) extends along the axial direction of the fine milling inner milling cutter disc (8), and the outer ring circumference of the second bearing (64) is in rolling contact with the outer circumference of the cutter disc cylinder (83).

6. The support device for the fine milling inner milling cutter disc according to claim 2, characterized in that: A plurality of limit assemblies (7) are also provided on the mounting surface (21), and the limit assemblies (7) are used to limit the position of the fine milling inner milling cutter disc (8) along the first direction from the side of the fine milling inner milling cutter disc (8) away from the mounting surface (21), so as to prevent the fine milling inner milling cutter disc (8) from falling.

7. A support device for a fine milling inner milling cutter disc according to claim 6, characterized in that: Three of the limit assemblies (7) are provided, two of which are provided near the bottom of the mounting surface (21), and another of which is provided near the top of the mounting surface (21), and the three limit assemblies (7) are arranged in an isosceles triangle.

8. The support device for the fine milling inner milling cutter disc according to claim 7, characterized in that: The limiting component (7) comprises: a third welding block (71), the third welding block (71) being fixedly arranged on the mounting surface (21); A limit block (72), the limit block (72) being arranged on a side of the third welding block (71) away from the mounting surface (21), one end of the limit block (72) extending to a side of the cutter disc body away from the mounting surface (21), and a gap being provided between the limit block (72) and the cutter disc body.

9. The support device for a fine milling inner milling cutter disc according to claim 1, characterized in that: The frame assembly comprises: A bottom plate (1), wherein two ribs (3) are arranged in a horizontal direction on the top of the bottom plate (1), and one side corresponding to the two ribs (3) both has an inclined surface; A main board (2), the main board (2) being arranged on the top of the bottom board (1), and one side of the main board (2) being fixedly connected to the inclined surface, and a side of the main board (2) away from the inclined surface being the mounting surface (21).

10. A support device for a fine milling inner milling cutter disc according to claim 9, characterized in that: The four bottom corners of the bottom plate (1) are each provided with moving wheels (4).

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