An inner hole grinding device for manufacturing planetary gears in wind turbine gearboxes

Abstract

The present invention relates to the field of gear processing equipment, and discloses an inner hole grinding device for manufacturing planetary gears of a wind turbine gearbox, comprising a shell and a grinding rod installed in the shell, wherein the inner upper end of the shell is provided with a mounting assembly, the upper end of the mounting assembly is provided with a clamping assembly, and one side of the clamping assembly is provided with a detection assembly, and the mounting assembly can be used to install the clamping assembly and the detection assembly, and can also adjust its position in the shell. The inner hole grinding device for manufacturing planetary gears of a wind turbine gearbox provided by the present invention has a clamping assembly and a detection assembly, which can detect the flatness of the end face of each gear, and detect whether the grinding rod has pits, protrusions, deformation and whether the rotating shaft is horizontal before each processing, so as to ensure the verticality of the end face and the inner hole, prevent over-grinding or inadequate grinding, and reduce the use of coolant and save installation space.

Description

Technical Field

[0001] The present invention relates to the technical field of gear processing equipment, in particular to an inner hole grinding device for manufacturing planetary gears of a wind turbine gearbox. Background Art

[0002] In the patent application with application announcement number CN219053813U, it includes a workbench, a grinding disc is rotatably arranged on the workbench, a power device is provided at the lower end of the workbench, the driving end of the power device is connected to the center of the bottom of the grinding disc and can drive the grinding disc to rotate; a clamping mechanism, the clamping mechanism is arranged on the top of the grinding disc, for clamping the gear to be polished; a lifting mechanism, the lifting mechanism is arranged on the upper surface of the workbench, the driving end of the lifting mechanism is connected to the support plate, and can drive the support plate to move in the vertical direction; a grinding mechanism, the grinding mechanism includes a first motor, a rotating rod, a mounting block, a motor gear, The rack and the grinding strip, the motor gear is rotatably arranged on the mounting block, the rack is slidably arranged on the mounting block, and the motor gear is meshed with the rack, one end of the rack is connected with a grinding strip, and the grinding end of the grinding strip can abut against the inner side wall of the inner hole of the gear to be polished, one end of the mounting block is connected to the bottom of the support plate through a connecting rod, the first motor is installed on the top of the support plate, the driving end of the first motor passes through the top of the support plate and is connected to the rotating rod, the lower end of the rotating rod is sleeved in the motor gear, the grinding strip is located directly above the inner hole of the gear to be polished, and the rack can drive the grinding strip to move radially along the inner hole of the gear to be polished. The advantages are: the gear to be polished is clamped and fixed by a clamping mechanism, and then the supporting plate is driven to move vertically by a lifting mechanism to drive the polishing mechanism to be placed in the inner hole of the gear to be polished. Through the coordinated use of the first motor, the rotating rod, the mounting block, the motor gear, the rack and the polishing strip, the first motor drives the rotating rod to drive the motor gear to rotate, thereby driving the rack to move, and then driving the polishing strip to move radially along the inner hole of the gear to be polished and abut against the side wall of the inner hole of the polishing gear to adapt to gears with different apertures, and the power device drives the polishing disk to rotate to polish the inner hole, thereby realizing the polishing of gears with different apertures.

[0003] In the prior art, including the aforementioned patents, most equipment focuses on safety during grinding, efficiency of loading and unloading, and cleanliness of the work area. However, in actual processing, the perpendicularity between the inner hole and the end face of the gear is very important. No matter what kind of grinding equipment is used in the prior art, it is impossible to know whether the grinding rod itself has deformed (such as bending deformation, tensile deformation, etc.) during or before the grinding process begins. In this case, it is necessary to conduct inspections before processing or to stop the machine for inspection during processing. For the processed parts, random inspections are performed. Although this can provide a guarantee for the yield rate, the efficiency is low and there is room for improvement. Summary of the Invention

[0004] The problem to be solved by the present invention is that it is inconvenient to avoid unnecessary damage to the gear when grinding the inner hole.

[0005] In order to solve the above technical problems, the technical solution of the present invention is: an inner hole grinding device for manufacturing planetary gears in a wind turbine gearbox, comprising a shell and a grinding rod installed in the shell, an inner upper end of the shell is provided with a mounting assembly, an upper end of the mounting assembly is provided with a clamping assembly, a side of the clamping assembly is provided with a detection assembly, the mounting assembly can be used to install the clamping assembly and the detection assembly, and can also adjust its position in the shell, the clamping assembly is used to clamp the workpiece and assist in lubrication, the detection assembly can detect the circular runout of the grinding rod, and can also chamfer the inner ring of the gear, the grinding rod is used to grind the inner hole of the gear, and control the opening and closing of the chamfer in the detection assembly, the diameter of the grinding rod is consistent with the diameter of the inner hole of the gear, the detection assembly includes a movable ring arranged on one side of the splint, and twelve top columns are slidingly provided inside the movable ring, and the top columns The cam is secured to the outer surface of the cam and is adapted to engage the outer surface of the cam, and the cam is secured to the outer surface of the cam when the cam is engaged.

[0006] Preferably, the clamping assembly includes two splints arranged in a circular shape, the splints are symmetrically arranged, the splints are installed at the upper end of the mounting seat, the splints can rotate under the action of the driving assembly in the mounting seat, and the two splints are provided with guide grooves on the opposite sides, and there are eight guide grooves, and the depth of the guide grooves increases from the outside to the inside.

[0007] Preferably, a mounting block is fixedly provided in the middle of the guide groove, and a nozzle is provided on the outer surface of the mounting block. There are three nozzles in total, two of which are parallel to the guide groove, and the other is perpendicular to the guide groove. A pad is slidably provided on the outer surface of the mounting block, and the pad is connected to the mounting block through a limit block and a screw.

[0008] Preferably, a second nozzle is provided on the outer surface of the pad, and the second nozzle is parallel to the guide groove. The second nozzle can be connected with the first nozzle after the pad retracts. The pad is made of rubber, and the pad can not only play an anti-slip role during installation, but also prevent the coolant from spraying out directly from the first nozzle during installation.

[0009] Preferably, a follower ring is fixedly provided on the outer surface of the splint on the other side of the guide groove, the follower ring is connected to the mounting block, the follower ring consists of an inner and outer part, the follower ring is hollow, a fixed ring is provided on the outer side of the follower ring, the fixed ring is rotatably connected to the follower ring, and a plurality of through holes are provided on one side of the follower ring located inside the fixed ring.

[0010] Preferably, the fixing ring is also hollow, the lower end of the fixing ring is fixedly connected to the mounting seat, the lower end of the fixing ring is provided with a through hole connected to the mounting seat, and the mounting seat can also pump coolant into the fixing ring. The coolant in the fixing ring moves into the pad after passing through the follower ring and is finally ejected from the two-way guide groove of the nozzle.

[0011] Preferably, the two ends of the spring 1 are fixedly connected to the bolt and the movable ring respectively, and four chamfering knives are fixedly provided at one end of the movable ring close to the splint, and the number of the chamfering knives must be two or more. The outer sides of the two movable rings are respectively provided with mounting ring 1 and mounting ring 2, and the mounting ring 1 is fixedly connected to the movable ring, and the other end of the mounting ring 1 is fixedly connected to the outer shell.

[0012] Preferably, the second mounting ring and the movable ring are connected by a telescopic rod, and a second spring is provided around the telescopic rod. The two ends of the second spring are fixedly connected to the second mounting ring and the movable ring respectively. The lower end of the second mounting ring is fixedly connected to the mounting seat, and the lower end of the movable ring is connected to the coolant pipeline in the mounting seat through a hose.

[0013] Compared with the prior art, the technical solution of the present invention has the following advantages:

[0014] (1) Under the action of the clamping assembly and the detection assembly, each gear can be inspected. When inspecting the gear, the flatness of the end face of the gear can be inspected first. By using this, the worker can know whether the gear is qualified before the gear is processed, and avoid ineffective processing. Secondly, the grinding rod can be inspected before each grinding, so that the worker can know in time whether the grinding rod has pits or protrusions that cannot be directly observed by the naked eye, whether it has been deformed, or whether its rotating shaft is horizontal. This not only ensures the verticality of the end face of the gear and the inner hole, but also prevents the inner hole of the gear from being over-ground or not ground in place during grinding. In addition, the clamping assembly and the detection assembly are combined with the function of spraying coolant, which not only reduces the usage per unit time while ensuring the effect, but also ensures that the workers have enough space to move when loading and unloading materials.

[0015] (2) The detection component can not only detect the grinding rod, but also chamfer the gear. This not only saves the time required for gear processing and reduces the cost of purchasing and equipment, but also provides convenience for workers when loading materials using the chamfering cutter. It can also ensure the concentricity of the gear inner hole and the grinding rod, avoiding the situation where the center of the circle is offset or the inner hole diameter is too large. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0017] Figure 2 This is a schematic diagram of a partial cross-sectional structure of the housing of the present invention;

[0018] Figure 3 For the present invention Figure 2 A in the middle is an enlarged structural diagram;

[0019] Figure 4 This is a schematic diagram of the structure of the mounting assembly and the clamping assembly of the present invention;

[0020] Figure 5 For the present invention Figure 4 The enlarged structural diagram at B in the middle;

[0021] Figure 6 Schematic diagram of the cross-sectional structure of the follower ring and the fixed ring in the clamping assembly of the present invention;

[0022] Figure 7 This is a schematic diagram of the cross-sectional structure of the splint of the present invention;

[0023] Figure 8 For the present invention Figure 7 The enlarged structural diagram at C in the middle;

[0024] Figure 9 Schematic diagram of the cross-sectional structure of the movable ring in the detection assembly of the present invention;

[0025] Figure 10 For the present invention Figure 9 This is a schematic diagram of the enlarged structure at point D in the middle.

[0026] In the figure: 1. Housing; 2. Mounting assembly; 201. Base plate; 202. Pneumatic cylinder; 203. Mounting seat; 3. Clamping assembly; 301. Clamping plate; 302. Guide groove; 303. Mounting block; 304. Nozzle 1; 305. Pad; 306. Nozzle 2; 307. Follower ring; 308. Fixed ring; 4. Detection assembly; 401. Movable ring; 402. Top column; 403. Ball bearing; 404. Bolt; 405. Spring 1; 406. Chamfering knife; 4071. Mounting ring 1; 4072. Mounting ring 2; 408. Telescopic rod; 409. Spring 2; 5. Grinding rod. DETAILED DESCRIPTION

[0027] To make the purpose, technical solutions and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0028] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the usual meanings understood by persons of ordinary skill in the field to which this disclosure belongs. The words “include” or “comprise” and the like used in this disclosure mean that the elements or objects preceding the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. The words “connect” or “connected” and the like are not limited to physical or mechanical connections, but can also include electrical connections, whether direct or indirect. “Up”, “down”, “left”, “right” and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0029] like Figures 1 to 10As shown, the present invention provides an inner hole grinding device for manufacturing planetary gears in a wind turbine gearbox, comprising a housing 1 and a grinding rod 5 installed in the housing 1. The upper end of the inner portion of the housing 1 is provided with a mounting assembly 2, the upper end of the mounting assembly 2 is provided with a clamping assembly 3, and one side of the clamping assembly 3 is provided with a detection assembly 4. The mounting assembly 2 can be used to install the clamping assembly 3 and the detection assembly 4, and can also adjust its position in the housing 1. The clamping assembly 3 is used to clamp the workpiece and assist in lubrication. The detection assembly 4 can detect the circular runout of the grinding rod 5 and chamfer the inner ring of the gear. , the grinding rod 5 is used to grind the inner hole of the gear and control the opening and closing of the chamfer in the detection component 4. The diameter of the grinding rod 5 is consistent with the diameter of the inner hole of the gear. The detection component 4 includes a movable ring 401 arranged on one side of the splint 301. Twelve top columns 402 are slidingly arranged inside the movable ring 401. One end of the top column 402 passes through the inner wall of the movable ring 401 and faces the center of the movable ring 401. A ball 403 is rotatably arranged in the middle of one end of the top column 402 close to the center of the movable ring 401. A screw is rotatably arranged at one end of the top column 402 located in the movable ring 401. The bolt 404 has a spring 405 arranged around it, and a sealing ring is arranged on the outside of the bolt 404, which can play a sealing role when it coincides with the movable ring 401. The ball 403 can not only reduce the friction between the top column 402 and the grinding rod 5, but also apply a thin layer of coolant to the surface of the grinding rod 5 before it enters. The mounting assembly 2 includes a base plate 201, and both ends of the base plate 201 are provided with a rodless cylinder. The base plate 201 is fixed to the housing 1 through the rodless cylinder. The rodless cylinders on both sides can also make the substrate 201 move repeatedly. A pneumatic cylinder 202 is fixedly provided on one side of the upper end of the substrate 201. Two mounting seats 203 are provided on the outer surface of the push rod of the pneumatic cylinder 202. One of the mounting seats 203 is fixedly connected to the substrate 201 and is slidably connected to the push rod of the pneumatic cylinder 202. The other mounting seat 203 is slidably connected to the substrate 201 and is fixedly connected to the push rod of the pneumatic cylinder 202. The substrate 201 is located in the middle of the housing 1 by default, and moves repeatedly with a small amplitude during processing. It will only move to both sides when chamfering is required.

[0030] The clamping assembly 3 includes two splints 301 arranged in a circular shape, and the splints 301 are symmetrically arranged. The splints 301 are installed at the upper end of the mounting seat 203. The splints 301 can rotate under the action of the driving assembly in the mounting seat 203. The two splints 301 are provided with guide grooves 302 on the opposite sides. There are eight guide grooves 302. The depth of the guide grooves 302 increases from the outside to the inside. The splints 301 can only rotate when chamfering.

[0031] A mounting block 303 is fixedly provided in the middle of the guide groove 302, and a nozzle 1 304 is provided on the outer surface of the mounting block 303. There are three nozzles 1 304 in total, two of which are parallel to the guide groove 302, and the other is perpendicular to the guide groove 302. A pad 305 is slidably provided on the outer surface of the mounting block 303, and the pad 305 is connected to the mounting block 303 by a limit block and screws.

[0032] A second nozzle 306 is provided on the outer surface of the pad 305. The second nozzle 306 is parallel to the guide groove 302. The second nozzle 306 can be connected to the first nozzle 304 after the pad 305 retracts. The pad 305 is made of rubber. The pad 305 can not only play an anti-slip role during installation, but also prevent the coolant from spraying directly out of the first nozzle 304 during installation.

[0033] A follower ring 307 is fixedly provided on the outer surface of the splint 301 on the other side of the guide groove 302. The follower ring 307 is connected to the mounting block 303. The follower ring 307 consists of an inner and outer part. The follower ring 307 is hollow. A fixed ring 308 is provided on the outer side of the follower ring 307. The fixed ring 308 is rotatably connected to the follower ring 307. A plurality of through holes are provided on one side of the follower ring 307 located inside the fixed ring 308.

[0034] The fixing ring 308 is also hollow, and the lower end of the fixing ring 308 is fixedly connected to the mounting seat 203. The lower end of the fixing ring 308 is provided with a through hole that is connected to the mounting seat 203. The mounting seat 203 can also pump coolant into the fixing ring 308. The coolant in the fixing ring 308 moves into the pad 305 after passing through the follower ring 307 and is finally ejected from the nozzle 2 306 into the guide groove 302.

[0035] The two ends of spring 1 405 are fixedly connected to the bolt 404 and the movable ring 401 respectively. Four chamfering knives 406 are fixedly provided at one end of the movable ring 401 close to the splint 301. The number of chamfering knives 406 must be two or more. The outer sides of the two movable rings 401 are respectively provided with mounting ring 1 4071 and mounting ring 2 4072. Mounting ring 1 4071 is fixedly connected to the movable ring 401. The other end of mounting ring 1 4071 is fixedly connected to the outer shell 1. Spring 1 405 is used to pull the bolt 404 inward. When the grinding rod 5 enters, the bolt 404 cannot overlap with the movable ring 401. It can only overlap with the movable ring 401 when the grinding rod 5 enters and the deformation of the grinding rod 5 is within the error range.

[0036] The second mounting ring 4072 is connected to the movable ring 401 via a telescopic rod 408. A second spring 409 is provided around the telescopic rod 408. The two ends of the second spring 409 are fixedly connected to the second mounting ring 4072 and the movable ring 401 respectively. The lower end of the second mounting ring 4072 is fixedly connected to the mounting seat 203. The lower end of the movable ring 401 is connected to the coolant pipeline in the mounting seat 203 through a hose.

[0037] The working principle and use process of the present invention: When grinding the inner hole of the gear, there are two situations:

[0038] First, when only the inner hole of the gear needs to be polished, the gear is placed between the clamping plates 301, and the worker pushes the movable ring 401 inward so that the chamfering knife 406 touches the inner hole of the gear to calibrate the center of the gear to coincide with the center of the clamping plate 301 and the polishing rod 5. After calibration, the movable ring 401 is released, and the pneumatic cylinder 202 is started to drive the clamping plate 301 to clamp the gear. During the process, the pad 305 retracts until it is fully clamped. At this time, the coolant seeps out from the nozzle 2 306 through the guide groove 302. If the end face of the gear is uneven, the coolant will flow to If there is unevenness and the gear leaks out from between the two guide grooves 302, the gear needs to be replaced; if there is no abnormality, the base plate 201 pushes the gear toward the polishing rod 5. When the polishing rod 5 contacts the top column 402, if there are pits, protrusions or large deformations on the surface, the corresponding top column 402 will be over-protruded or retracted, causing the bolt 404 to be unable to seal the movable ring 401, and the coolant will be sprayed from the corresponding direction. If there is no abnormality, the polishing rod 5 enters the inner hole of the gear and rotates to polish. The clamping plate 301 remains stationary, and the leaking coolant drips onto the surface of the polishing rod 5 to cool it down;

[0039] Second, when the edges of the inner hole and end face need to be chamfered after grinding:

[0040] If only one-side chamfering is required, after the gear grinding is completed, the base plate 201 moves toward the grinding rod 5 until the end of the grinding rod 5 pushes out the movable ring 401 and the chamfering knife 406 abuts against the outer edge of the inner hole of the gear. At this time, the clamping plate 301 rotates, and the base plate 201 slowly moves toward the grinding rod 5. After reaching the predetermined chamfering depth, it stops, completing the single-side chamfering. The centrifugal force generated by the rotation of the clamping plate 301 throws the debris into the guide groove 302, where it is captured by the coolant.

[0041] If double-sided chamfering is required, after completing single-sided chamfering, the substrate 201 moves toward the housing 1, and when another set of chamfering cutters 406 abuts against the outer edge of the inner hole, the clamping plate 301 rotates, and the substrate 201 slowly moves toward the housing 1 and stops after reaching the predetermined chamfering depth.

[0042] The above embodiments are merely exemplary embodiments of the present invention and are not intended to limit the scope of the present invention. The scope of protection of the present invention is defined by the claims. Those skilled in the art will be able to make various modifications or equivalent substitutions to the present invention within the spirit and scope of protection of the present invention, and such modifications or equivalent substitutions should also be deemed to fall within the scope of protection of the present invention.

Claims

1. An inner hole grinding device for manufacturing planetary gears of a wind turbine gearbox, comprising a housing (1) and a grinding rod (5) installed in the housing (1), characterized in that: The upper end of the interior of the housing (1) is provided with a mounting assembly (2), the upper end of the mounting assembly (2) is provided with a clamping assembly (3), and one side of the clamping assembly (3) is provided with a detection assembly (4). The mounting assembly (2) can be used to install the clamping assembly (3) and the detection assembly (4), and can also adjust its position in the housing (1). The clamping assembly (3) is used to clamp the workpiece and assist in lubrication. The detection assembly (4) can detect the circular runout of the grinding rod (5) and can also chamfer the inner ring of the gear. The grinding rod (5) is used to The inner hole of the gear is ground, and the opening and closing of the inner chamfer of the detection component (4) is controlled. The diameter of the grinding rod (5) is consistent with the diameter of the inner hole of the gear. The detection component (4) includes a movable ring (401) arranged on one side of the splint (301). Twelve top columns (402) are slidably arranged inside the movable ring (401). One end of the top column (402) passes through the inner side wall of the movable ring (401) and faces the center of the movable ring (401). A ball ( 403), the top column (402) is located in the movable ring (401) and one end thereof is rotatably provided with a bolt (404), the outer end of the bolt (404) coincides with the outer surface of the movable ring (401), a spring (405) is provided around the bolt (404), and a sealing ring is provided on the outer side of the bolt (404), which can play a sealing role when it coincides with the movable ring (401), and the mounting assembly (2) includes a base plate (201), both ends of the base plate (201) are provided with a rodless cylinder, and the base plate (201) is provided with a rodless cylinder. The cylinder is fixed to the housing (1), and the rodless cylinders on both sides of the substrate (201) can also make the substrate (201) move repeatedly. A pneumatic cylinder (202) is fixedly provided on one side of the upper end of the substrate (201), and two mounting seats (203) are provided on the outer surface of the push rod of the pneumatic cylinder (202). One of the mounting seats (203) is fixedly connected to the substrate (201) and is slidably connected to the push rod of the pneumatic cylinder (202), and the other mounting seat (203) is slidably connected to the substrate (201) and is fixedly connected to the push rod of the pneumatic cylinder (202).

2. The inner hole grinding equipment for manufacturing planetary gears of a wind turbine gearbox according to claim 1, characterized in that: The clamping assembly (3) includes two annular clamping plates (301), the clamping plates (301) are symmetrically arranged, and the clamping plates (301) are mounted on the upper end of the mounting seat (203). The clamping plates (301) can rotate under the action of a driving assembly in the mounting seat (203). The two clamping plates (301) are provided with guide grooves (302) on opposite sides. There are eight guide grooves (302), and the depth of the guide grooves (302) increases from the outside to the inside.

3. The inner hole grinding equipment for manufacturing planetary gears of a wind turbine gearbox according to claim 2, characterized in that: A mounting block (303) is fixedly provided in the middle of the guide groove (302), and a nozzle (304) is provided on the outer surface of the mounting block (303). There are three nozzles (304) in total, two of which are parallel to the guide groove (302) and the other is perpendicular to the guide groove (302). A pad (305) is slidably provided on the outer surface of the mounting block (303), and the pad (305) is connected to the mounting block (303) through a limit block and a screw.

4. The inner hole grinding equipment for manufacturing planetary gears of a wind turbine gearbox according to claim 3, characterized in that: The outer surface of the pad (305) is provided with a second nozzle (306), and the second nozzle (306) is parallel to the guide groove (302). The second nozzle (306) can be connected with the first nozzle (304) after the pad (305) retracts. The pad (305) is made of rubber. The pad (305) can not only play an anti-slip role during installation, but also prevent the coolant from being directly sprayed out from the first nozzle (304) during installation.

5. The inner hole grinding equipment for manufacturing planetary gears of a wind turbine gearbox according to claim 4, characterized in that: A follower ring (307) is fixedly provided on the outer surface of the splint (301) on the other side of the guide groove (302), the follower ring (307) being in conduction with the mounting block (303), the follower ring (307) consisting of an inner and outer part, the follower ring (307) being hollow, a fixed ring (308) being provided on the outer side of the follower ring (307), the fixed ring (308) being rotatably connected to the follower ring (307), and a plurality of through holes being provided on a surface of the follower ring (307) located inside the fixed ring (308).

6. The inner hole grinding equipment for manufacturing planetary gears of a wind turbine gearbox according to claim 5, characterized in that: The fixing ring (308) is also hollow, and the lower end of the fixing ring (308) is fixedly connected to the mounting seat (203). The lower end of the fixing ring (308) is provided with a through hole that is connected to the mounting seat (203). The mounting seat (203) can also pump coolant into the fixing ring (308). The coolant in the fixing ring (308) moves into the pad (305) after passing through the follower ring (307) and is finally ejected from the nozzle 2 (306) into the guide groove (302).

7. The inner hole grinding equipment for manufacturing planetary gears of a wind turbine gearbox according to claim 1, characterized in that: The two ends of the spring 1 (405) are fixedly connected to the bolt (404) and the movable ring (401), respectively. Four chamfering knives (406) are fixedly provided at one end of the movable ring (401) close to the splint (301). The number of the chamfering knives (406) must be two or more. The outer sides of the two movable rings (401) are respectively provided with a mounting ring 1 (4071) and a mounting ring 2 (4072). The mounting ring 1 (4071) is fixedly connected to the movable ring (401), and the other end of the mounting ring 1 (4071) is fixedly connected to the housing (1).

8. The inner hole grinding equipment for manufacturing planetary gears of a wind turbine gearbox according to claim 7, characterized in that: The second mounting ring (4072) and the movable ring (401) are connected via a telescopic rod (408), and a second spring (409) is provided around the telescopic rod (408). The two ends of the second spring (409) are fixedly connected to the second mounting ring (4072) and the movable ring (401), respectively. The lower end of the second mounting ring (4072) is fixedly connected to the mounting seat (203), and the lower end of the movable ring (401) is connected to the coolant pipeline in the mounting seat (203) via a hose.

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