Milling head with high-precision transmission and method for adjusting meshing clearance of transmission gears of milling head

Abstract

The invention relates to the technical field of milling heads, in particular to a high-precision transmission milling head and a milling head transmission gear meshing clearance adjusting method.The high-precision transmission milling head comprises a bearing device, a milling head body, an indexing fluted disc and a driving device, and the driving device comprises two straight gears in meshing transmission with the indexing fluted disc, a belt and a motor; the adjusting assembly is used for adjusting the meshing clearance between the straight gear and the indexing fluted disc, the adjusting assembly comprises a fixing base, a rotating assembly, gaskets, a limiting block and a fastener, the gaskets, the limiting block and the fastener are arranged on the two sides of the rotating assembly respectively, and the adjusting assembly is used for adjusting the meshing clearance between the straight gear and the indexing fluted disc according to actual working conditions. The optimal meshing clearance in the transmission process is ensured, so that high-precision transmission is realized; besides, in the transmission process, the flexible locking assembly is used for further positioning the position of the first rotating shaft, it is guaranteed that the position of the first rotating shaft is kept unchanged in the stress process, and therefore it is guaranteed that the meshing clearance between the gears is optimal.

Description

Technical Field

[0001] The invention relates to the technical field of milling heads, and in particular to a milling head with high-precision transmission and a method for adjusting meshing clearance of transmission gears of the milling head. Background Art

[0002] The milling head is one of the machine tool accessories installed on the milling machine and connected to the spindle to drive the milling cutter to rotate. It is an important part of the machine tool accessories.

[0003] Chinese patent CN107206561B discloses a processing unit for a machine tool, comprising: a head bracket that can be attached to the machine tool and has a head bracket housing, a swivel head that is arranged to rotate relative to the head bracket around the swivel head rotation axis and has a swivel head housing, a spindle head attached to the swivel head and having a working spindle, and a cable line extending to the swivel head in the head bracket housing and having a plurality of components, the plurality of components are continuously arranged along the cable line and movably connected together. Adjacent components can rotate and swivel relative to each other in this case, and each component has a center piece and a sheath separated therefrom. The center piece is connected to the sheath via one or more connecting elements.

[0004] However, the technical solution refers to its attached Figure 7 It can be seen that in the belt-driven double-gear transmission process, the gear shaft at one end that contacts the belt is a cantilever structure. During the transmission process, due to the tension of the belt, the gear shaft of the cantilever structure is bent, affecting the meshing clearance between the gears, thereby affecting the transmission accuracy of the gears. At the same time, the meshing clearance between the two small gears and the large gear plate is a fixed setting, and the meshing clearance cannot be adjusted according to the actual working conditions, thereby ensuring the optimal meshing clearance and improving the processing accuracy, especially for high-frequency swing or adjustment of the processing tool angle. The strength of the transmission device and the transmission positioning accuracy are a great test. Summary of the invention

[0005] The purpose of the present invention is to provide a milling head with high-precision transmission in view of the shortcomings of the prior art. By setting a support seat, the technical problems of low transmission accuracy and short service life caused by the traditional cantilever structure support are changed. At the same time, the meshing clearance between the spur gear and the dividing toothed disc is adjusted according to the actual working conditions by using an adjustment component to ensure the optimal meshing clearance during the transmission process, thereby realizing high-precision transmission; in addition, the position of the first rotating shaft is further positioned during the transmission process by using a flexible locking component to ensure that the position of the first rotating shaft remains unchanged during the force application process, thereby ensuring that the meshing clearance between the gears is optimal.

[0006] To achieve the above object, the present invention provides the following technical solutions: The transmission gear of the present invention is a gear selected from the group consisting of a gearbox and a gearbox, wherein the gearbox has two guide wheels which are engaged with the guide wheels, and a guide wheel is connected to the guide wheel to move the guide wheel in a synchronous manner.

[0007] As an improvement, the rotating assembly includes: a moving block slidably connected to the inside of the fixed seat, a first rotating shaft rotatably connected to the moving block, and a connecting member arranged at one end of the first rotating shaft and connected to the belt; the spur gear is arranged at the lower end of the first rotating shaft.

[0008] As an improvement, the cross section of the moving block is ⊥-shaped, the first rotating shaft passes through the moving block and is rotatably connected to the moving block through a plurality of first bearings, and the lower end of the moving block is slidably connected to the inner wall of the fixed seat.

[0009] As an improvement, a stabilizing component for improving the rigidity of the first rotating shaft is arranged above the connecting member, and the stabilizing component includes: a supporting seat arranged above the fixing seat, a second bearing rotatably connected to the first rotating shaft, a bearing seat slidably connected to the supporting seat and used to fix the second bearing, and a locking member arranged on the bearing seat for fixing the second bearing.

[0010] As an improvement, it also includes a flexible locking assembly for further fixing the position of the gasket during operation.

[0011] As an improvement, a flexible locking space is formed inside the fixing seat, a non-Newtonian fluid flows into the flexible locking space, and an end of the gasket extends into the flexible locking space.

[0012] As an improvement, the flexible locking assembly includes a slider disposed on one side of the bottom end of the fixing seat, the slider passes through the inner wall of the fixing seat, and a driving assembly driving the slider to move back and forth.

[0013] As an improvement, the driving assembly includes: a transmission member connected to the belt, a second rotating shaft fixedly connected to the transmission member, a first connecting rod rotatably connected to the end of the second rotating shaft, a second connecting rod rotatably connected to the end of the first connecting rod, and a fixed assembly arranged between the fixed seat and the second rotating shaft, and the end of the second connecting rod is rotatably connected to the slider.

[0014] As an improvement, the fixing assembly includes: a third bearing rotatably connected to the second rotating shaft, a frame arranged on the outer periphery of the third bearing, and a fixing rod arranged at one end of the frame, and the end of the fixing rod is fixedly connected to the outer wall of the fixing seat.

[0015] Another object of the present invention is to provide a method for adjusting the meshing clearance of a milling head transmission gear in view of the deficiencies in the prior art, thereby ensuring optimal transmission accuracy by selecting different gear meshing clearances according to different working conditions.

[0016] To achieve the above object, the present invention provides the following technical solutions: A method for adjusting the meshing clearance of a milling head transmission gear, used for adjusting the meshing clearance of a milling head with high-precision transmission as claimed in any one of claims 1 to 9, characterized in that it comprises the following steps: Step 1: Pre-install the spur gear position. After installing the spur gear on the first rotating shaft, adjust the position of the limit block so that the spur gear and the indexing gear plate are initially meshed, and then pre-tighten the limit blocks on both sides by fasteners or adjust the number of gaskets to ensure the pre-positioning of the moving block; Step 2: Detection of meshing clearance: Use the extruded lead wire method or the feeler gauge inspection method to measure the meshing clearance between the pre-installed spur gear and the indexing gear disc, and compare it with the theoretical optimal meshing clearance; Step 3, adjustment of the optimal meshing clearance: if the meshing clearance in step 2 is larger than the theoretical meshing clearance, adjust the fastener on the left side so that the moving block moves to the right by the difference between the theoretical meshing clearance and the actual meshing clearance, and then repeat step 2 to detect the adjusted meshing clearance; if the meshing clearance in step 2 is smaller than the theoretical meshing clearance, adjust the fastener on the right side so that the moving block moves to the left by the difference between the theoretical meshing clearance and the actual meshing clearance, and then repeat step 2 to detect the adjusted meshing clearance; Step 4: Lock the transmission gear position: After the meshing clearance detected in step 3 matches the theoretical meshing clearance, use the fastening nut to lock the position of the fastener; Preferably, when using extruded lead wire to measure the meshing clearance, the lead wire is placed on the tooth side of the meshing gear, and the spur gear is rotated so that the lead wire is squeezed and deformed by the meshing gear. After removing the lead wire, the thickness of the squeezed and deformed lead wire is measured, which is the meshing clearance.

[0017] Preferably, when the gap is measured by the feeler gauge inspection method, feeler gauges of different thicknesses are sequentially inserted into the tooth gap after meshing, and the thickness of the largest feeler gauge that can be inserted is the meshing gap.

[0018] The beneficial effects of the present invention are: (1) The present invention arranges a support seat on a fixed seat, and arranges an end portion for supporting the first rotating shaft on the support seat, thereby changing the technical problems of low transmission accuracy and short service life caused by the traditional cantilever structure support, and at the same time avoids the bending of the first rotating shaft due to excessive load during the transmission process, which affects the transmission accuracy, thereby improving the processing accuracy of the milling head; (2) The present invention adjusts the setting of the adjustment component and utilizes a gasket or a fastener to drive the movement of the limit block to change the center distance of the moving block relative to the indexing gear disk, thereby adjusting the meshing clearance and ensuring that the gear meshing clearance is optimal during the operation of the system, thereby improving the transmission accuracy and solving the problem in the prior art that the meshing clearance becomes larger due to poor original processing accuracy or gear wear after the machine tool has been working for a period of time, thereby affecting the gear transmission accuracy.

[0019] (3) In the present invention, during the operation of the milling head, when the system requires high-power processing or frequent swinging, the movement of the belt drives the driving assembly to reciprocate, so that the slider repeatedly strikes the non-Newtonian fluid in the flexible locking space, so that the non-Newtonian fluid maintains high strength, fixes the gasket used to limit the position of the milling head, and further ensures the position of the first rotating shaft, thereby ensuring the meshing clearance of the gears.

[0020] (4) The present invention reduces the gear transmission clearance by arranging two sets of spur gears and the indexing gear disc for synchronous meshing transmission, thereby further improving the transmission accuracy and the swing accuracy of the milling head, thereby achieving high-precision machining.

[0021] In summary, the present invention has the advantages of adjustable gear meshing clearance, high transmission accuracy, simple structure, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the structure of the limiting device of the present invention; Figure 3 It is a front cross-sectional view of the limiting device of the present invention; Figure 4 for Figure 3 A magnified image of point A; Figure 5 for Figure 3 The enlarged view of point B; Figure 6 is a side sectional view of the limiting device of the present invention; Figure 7This is an enlarged view of Figure C; Figure 8 This is an enlarged view of Figure D; Fig. 9 This is an enlarged view of Figure E.

[0023] Figure numerals: 1- receiving device; 11- milling head body; 12- indexing gear disc; 13- outer cover; 14- mounting seat; 2- driving device; 21- motor; 22- belt; 23- receiving block; 3- limiting device; 31- fixed seat; 311- flexible locking space; 312- slide rail; 32- rotating assembly; 321- moving block; 322- first rotating shaft; 3221- first bearing; 323- connecting piece; 324- spur gear; 325- bushing; 32 6-bearing cover; 33-gasket; 34-limiting block; 35-fastener; 36-slider; 37-driving assembly; 371-transmission member; 372-second rotating shaft; 373-first connecting rod; 374-second connecting rod; 375-fixing assembly; 3751-third bearing; 3752-frame; 3753-fixing rod; 38-stabilizing assembly; 381-support seat; 382-second bearing; 383-bearing seat; 384-locking member; 39-sealing ring. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] In the description of the present invention, 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 positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0026] Example like Figure 1-Figure 9 As shown, this embodiment provides a milling head with high-precision transmission, including: a receiving device 1, a milling head body installed at one end of the receiving device 1, a dividing toothed disc 12 rotatably arranged on the milling head body, and a driving device 2 arranged above the receiving device 1 for driving the dividing toothed disc 12 to rotate, wherein the driving device 2 includes two spur gears 324 meshing with the dividing toothed disc 12, a belt 22 driving the spur gears 324 to rotate synchronously, and a motor 21 connected to the belt 22 in a transmission manner, wherein the motor 21 is adjustably connected to the outer cover 13 of the receiving device 1 through a receiving block 23, so that It is used to tighten the belt transmission to prevent the belt from loosening and affecting the transmission accuracy; it also includes an adjustment component 3 for adjusting the meshing clearance between the spur gear 324 and the indexing toothed disc 12, and the adjustment component 3 includes a fixed seat 31 fixedly connected to the outer cover 13, a rotating component 32 vertically arranged inside the fixed seat 31, and a plurality of gaskets 33 respectively arranged on both sides of the rotating component 32 for adjusting the position of the rotating component 32, a limit block 34 arranged between the inner wall of the fixed seat 31 and the gasket 33, and fasteners 35 arranged on both sides of the fixed seat 31 for fixing the limit block 34.

[0027] It should be noted that the milling head body includes a rotating shaft transmission-connected to the indexing gear disc 12, the rotating shaft is connected to an electric spindle, the electric spindle is used to drive the milling cutter to rotate, and the indexing gear disc 12 drives the rotating shaft to rotate, thereby realizing the reciprocating swing of the electric spindle.

[0028] Furthermore, the limit block 34 is locked by the fastener 35, and the limit block 34 will press the gasket 33, and the gasket 33 will press the rotating component 32, so that the rotating component 32 is more stable when rotating and will not be offset due to vibration. The number of gaskets 33 can be replaced according to actual usage requirements to ensure the meshing clearance between the spur gear 324 and the dividing toothed disc 12, thereby maximizing the stability of the rotating component 32.

[0029] As an improvement, the rotating assembly 32 includes: a moving block 321 slidably connected to the inside of the fixed base 31, a first rotating shaft 322 rotatably connected to the moving block 321, and a connecting member 323 arranged at one end of the first rotating shaft 322 and connected to the belt 22; the spur gear 324 is arranged at the lower end of the first rotating shaft 322, the connecting member 323 rotates with the first rotating shaft 322, and then drives the spur gear 324 to rotate, and the two groups of spur gears 324 are synchronously meshed with the dividing toothed disc for transmission, thereby reducing the transmission clearance of the gear transmission and improving the gear transmission accuracy.

[0030] In this embodiment, the cross-section of the moving block 321 is ⊥-shaped and hollow inside. The first rotating shaft 322 passes through the moving block 321 and is connected to the moving block 321 through a plurality of first bearings 3221. The lower end of the moving block 321 is slidably connected to the inner wall of the fixed seat 31. This structure can not only ensure the normal rotation of the rotating component 32, but also ensure that the rotating component 32 can be moved and adjusted according to actual use requirements, thereby ensuring that the spur gear 324 is in the optimal working position.

[0031] In this embodiment, a stabilizing component 38 for improving the rigidity of the first rotating shaft 322 is arranged above the connecting member 323. The stabilizing component 38 includes: a supporting seat 381 arranged above the fixing seat 31, a second bearing 382 rotatably connected to the first rotating shaft 322, a bearing seat 383 slidably connected to the supporting seat 381 and used to fix the second bearing 382, ​​and a locking member 384 arranged on the bearing seat 383 for fixing the second bearing 382. The stabilizing component 38 can effectively prevent the first rotating shaft 322 from shaking due to the belt 22 driving the connecting member 323 to rotate, thereby causing the position of the rotating component 32 to shift, and other problems, thereby ensuring the stability of the overall structure of the milling head.

[0032] In this embodiment, a shaft sleeve 325 is sleeved on the first rotating shaft 322, and the shaft sleeve 325 is arranged between the upper and lower first bearings 3221. A bearing cover 326 is arranged at the bottom end of the first bearing 3221 near the bottom of the moving block 321 to further ensure the stability of the first rotating shaft 322 during operation.

[0033] In this embodiment, a slider 36 is disposed at one side of the bottom end of the fixing seat 31 . The slider 36 completely penetrates the inner wall of the fixing seat 31 . The slider 36 is used to seal the fixing seat 31 and guide the sliding process of the slider.

[0034] In addition, a plurality of slide rails 312 are arranged on the inner wall of the fixed seat 31, and the slide rails 312 are respectively connected to the upper and lower ends of the movable block 321. The slide rails 312 can not only ensure that the movable block 321 can slide smoothly, but also limit the position of the movable block 321, that is, it has a positioning function, and the slide rail 312 located at the upper end of the movable block 321 is arranged close to the gasket 33, that is, the gasket 33 can also move along the slide rail 312 without displacement.

[0035] Embodiment 2 like Figure 2-Figure 9As shown, the components identical or corresponding to those in the first embodiment are marked with the corresponding reference numerals in the first embodiment. For the sake of simplicity, only the differences from the first embodiment are described below. The second embodiment differs from the first embodiment in that: In this embodiment, a flexible locking assembly is also included for further fixing the position of the gasket 33 during operation.

[0036] A flexible locking space 311 is formed inside the fixing seat 31 , and a non-Newtonian fluid flows into the flexible locking space 311 . An end of the gasket 33 extends into the flexible locking space 311 .

[0037] As an improvement, the flexible locking assembly includes a slider 36 disposed on one side of the bottom end of the fixing seat 31 , the slider 36 passes through the inner wall of the fixing seat 31 , and a driving assembly 37 driving the slider 36 to move back and forth.

[0038] Furthermore, the driving assembly 37 includes: a transmission member 371 connected to the belt 22, a second rotating shaft 372 fixedly connected to the transmission member 371, a first connecting rod 373 rotatably connected to the end of the second rotating shaft 372, a second connecting rod 374 rotatably connected to the end of the first connecting rod 373, and a fixed assembly 375 arranged between the fixed seat 31 and the second rotating shaft 372, and the end of the second connecting rod 374 is rotatably connected to the slider 36.

[0039] The transmission member 371 abuts against the belt 22. Driven by the belt, the transmission member 371 rotates, and then drives the second rotating shaft 372 to rotate. The second rotating shaft 372 drives the first connecting rod 373 to rotate. The first connecting rod 373 drives the second connecting rod 374 to rotate. The second connecting rod 374 drives the slider 36 to move in the fixed seat 31, so as to achieve reciprocating impact on the non-Newtonian fluid in the flexible locking space 311, so that the non-Newtonian fluid maintains a certain rigidity, thereby ensuring the stability of the position of the first rotating shaft 322 during operation, thereby achieving the guarantee of the gear meshing clearance. As an improvement, the fixing assembly 375 includes: a third bearing 3751 rotatably connected to the second rotating shaft 372, a frame 3752 arranged on the outer periphery of the third bearing 3751, and a fixing rod 3753 arranged at one end of the frame 3752, and the end of the fixing rod 3753 is fixedly connected to the outer wall of the fixing seat 31.

[0040] In this embodiment, the cross-section of the bottom end of the gasket 33 is preferably V-shaped or triangular. After the non-Newtonian fluid is introduced into the fixing seat 31, the fluid will directly enter the V-shaped area formed between the two gaskets 33. After the non-Newtonian fluid hardens, it can not only ensure the stability and firmness between the gaskets 33, but also eliminate the gaps between the gaskets 33, thereby improving the sealing performance and further ensuring the stability of the rotating component 32 during operation.

[0041] Of course, the limit block 34 and the gasket 33, the limit block 34 and the fixed seat 31, the gasket 33 and the moving block 321, and the moving block 321 and the fixed seat 31 are all sealed by the sealing ring 39. The sealing ring 39 further ensures the sealing of the fixed seat 31, so that the rotating assembly 32 runs smoothly.

[0042] Embodiment 3 This embodiment provides a method for adjusting the meshing clearance of a milling head transmission gear, which is used to adjust the meshing clearance of a milling head with a high-precision transmission as described in the above embodiment, and includes the following steps: Step 1: Pre-install the spur gear position. After installing the spur gear 324 on the first rotating shaft 322, adjust the position of the limit block 34 so that the spur gear 324 and the indexing gear plate 12 are initially meshed, and then the limit blocks 34 on both sides are pre-tightened by the fasteners 35 or the number of gaskets 33 is adjusted to ensure the pre-positioning of the moving block 321; Step 2: Detection of meshing clearance: Use the extruded lead wire method or the feeler gauge inspection method to measure the meshing clearance between the pre-installed spur gear 324 and the indexing gear disc 12, and compare it with the theoretical optimal meshing clearance; Step 3, adjusting the optimal meshing clearance: if the meshing clearance in step 2 is larger than the theoretical meshing clearance, adjust the fastener 35 on the left side so that the moving block 321 moves rightward by the difference between the theoretical meshing clearance and the actual meshing clearance, and then repeat step 2 to detect the adjusted meshing clearance; if the meshing clearance in step 2 is smaller than the theoretical meshing clearance, adjust the fastener 35 on the right side so that the moving block 321 moves leftward by the difference between the theoretical meshing clearance and the actual meshing clearance, and then repeat step 2 to detect the adjusted meshing clearance; Step 4: Locking the transmission gear position: After the meshing clearance detected in step 3 matches the theoretical meshing clearance, the position of the fastener 35 is locked using a fastening nut; When the meshing clearance is measured by extruding the lead wire, the lead wire is placed on the tooth side of the meshing gear, and the spur gear 324 is rotated. The lead wire is squeezed and deformed by the meshing gear. After the lead wire is removed, the thickness of the squeezed and deformed lead wire is measured, which is the meshing clearance. When using the feeler gauge inspection method to measure the gap, insert feeler gauges of different thicknesses into the meshing tooth gap in sequence. The thickness of the largest feeler gauge that can be inserted is the meshing gap.

[0043] It should be noted that the gear meshing clearance is the basis for ensuring high-precision gear transmission. The existing equipment gear meshing clearance cannot be adjusted, resulting in inconsistent equipment processing accuracy, affecting the consistency of processing accuracy of different equipment. At the same time, after the equipment has been used for a period of time, the meshing clearance becomes larger due to gear wear, further affecting the product processing accuracy. Therefore, it is necessary to regularly detect the gear meshing clearance and adjust it according to the optimal meshing clearance to ensure product processing accuracy.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A milling head with high-precision transmission, comprising: A receiving device (1), a milling head body mounted at one end of the receiving device (1), a dividing toothed disc (12) rotatably mounted on the milling head body, and a driving device (2) disposed above the receiving device (1) for driving the dividing toothed disc (12) to rotate, wherein the driving device (2) comprises two spur gears (324) meshing with the dividing toothed disc (12), a belt (22) driving the two spur gears (324) to rotate synchronously, and a motor (21) connected to the belt (22); the driving device (21) further comprises a motor for adjusting the spur gears (324) ) and the indexing gear disc (12), the adjusting component (3) comprising a fixing seat (31) fixedly connected to the outer cover (13), a rotating component (32) vertically arranged inside the fixing seat (31), a plurality of gaskets (33) respectively arranged on both sides of the rotating component (32) for adjusting the position of the rotating component (32), a limit block (34) arranged between the inner wall of the fixing seat (31) and the gasket (33), and fasteners (35) arranged on both sides of the fixing seat (31) for fixing the limit block (34).

2. A milling head with high-precision transmission according to claim 1, characterized in that: The rotating assembly (32) comprises: a moving block (321) slidably connected to the interior of the fixing seat (31), a first rotating shaft (322) rotatably connected to the moving block (321), and a connecting member (323) arranged at one end of the first rotating shaft (322) and connected to the belt (22); the spur gear (324) is arranged at the lower end of the first rotating shaft (322).

3. A milling head with high-precision transmission according to claim 2, characterized in that: The cross section of the moving block (321) is ⊥-shaped, the first rotating shaft (322) passes through the moving block (321) and is rotationally connected to the moving block (321) via a plurality of first bearings (3221), and the lower end of the moving block (321) is slidably connected to the inner wall of the fixing seat (31).

4. A milling head with high-precision transmission according to claim 2, characterized in that: A stabilizing component (38) for increasing the rigidity of the first rotating shaft (322) is arranged above the connecting member (323), and the stabilizing component (38) comprises: a supporting seat (381) arranged above the fixing seat (31), a second bearing (382) rotatably connected to the first rotating shaft (322), a bearing seat (383) slidably connected to the supporting seat (381) and used to fix the second bearing (382), and a locking member (384) arranged on the bearing seat (383) and used to fix the second bearing (382).

5. A milling head with high-precision transmission according to claim 1, characterized in that: It also includes a flexible locking assembly for further fixing the position of the gasket (33) during operation.

6. A milling head with high-precision transmission according to claim 5, characterized in that: A flexible locking space (311) is formed inside the fixing seat (31), a non-Newtonian fluid flows into the flexible locking space (311), and an end of the gasket (33) extends into the flexible locking space (311).

7. A milling head with high-precision transmission according to claim 6, characterized in that: The flexible locking assembly comprises a slider (36) disposed on one side of the bottom end of the fixing seat (31), the slider (36) penetrating the inner wall of the fixing seat (31), and a driving assembly (37) driving the slider (36) to reciprocate.

8. A milling head with high-precision transmission according to claim 7, characterized in that: The driving assembly (37) comprises: a transmission member (371) connected to the belt (22), a second rotating shaft (372) fixedly connected to the transmission member (371), a first connecting rod (373) rotatably connected to the end of the second rotating shaft (372), a second connecting rod (374) rotatably connected to the end of the first connecting rod (373), and a fixing assembly (375) arranged between the fixing seat (31) and the second rotating shaft (372), wherein the end of the second connecting rod (374) is rotatably connected to the slider (36).

9. A milling head with high-precision transmission according to claim 8, characterized in that: The fixing assembly (375) comprises: a third bearing (3751) rotatably connected to the second rotating shaft (372), a frame (3752) arranged on the periphery of the third bearing (3751), and a fixing rod (3753) arranged at one end of the frame (3752), wherein the end of the fixing rod (3753) is fixedly connected to the outer wall of the fixing seat (31).

10. A method for adjusting the meshing clearance of a milling head transmission gear, used for adjusting the meshing clearance of a milling head with high-precision transmission as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: Pre-install the spur gear position. After the spur gear (324) is installed on the first rotating shaft (322), the position of the limit block (34) is adjusted so that the spur gear (324) and the indexing gear plate (12) are initially meshed. The limit blocks (34) on both sides are pre-tightened by fasteners (35) or the number of gaskets (33) is adjusted to ensure that the moving block (321) is pre-positioned. Step 2: Meshing clearance detection: using a lead wire extrusion method or a feeler gauge inspection method to measure the meshing clearance between the pre-installed spur gear (324) and the indexing gear disc (12), and then comparing the meshing clearance with a theoretical optimal meshing clearance; Step 3, adjusting the optimal meshing clearance: if the meshing clearance in step 2 is greater than the theoretical meshing clearance, adjust the fastener (35) on the left side so that the moving block (321) moves rightward by a distance equal to the difference between the theoretical meshing clearance and the actual meshing clearance, and then repeat step 2 to detect the adjusted meshing clearance; If the meshing clearance in step 2 is smaller than the theoretical meshing clearance, adjust the fastener (35) on the right side so that the moving block (321) moves leftward by a distance equal to the difference between the theoretical meshing clearance and the actual meshing clearance, and then repeat step 2 to detect the adjusted meshing clearance; Step 4: locking the transmission gear position: after the meshing clearance detected in step 3 matches the theoretical meshing clearance, the position of the fastener (35) is locked using a fastening nut; When the meshing clearance is measured by extruding a lead wire, the lead wire is placed on the tooth side of the meshing gear, and the spur gear (324) is rotated so that the lead wire is squeezed and deformed by the meshing gear. After the lead wire is removed, the thickness of the squeezed and deformed lead wire is measured, which is the meshing clearance. When using the feeler gauge inspection method to measure the gap, insert feeler gauges of different thicknesses into the meshing tooth gap in sequence. The thickness of the largest feeler gauge that can be inserted is the meshing gap.

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