A kind of wind turbine gear box planetary gear manufacturing inner hole polishing equipment

Abstract

The application relates to the technical field of polishing equipment, and discloses a wind turbine gear box planetary gear manufacturing inner hole polishing equipment which comprises an array type polishing mechanism and an elastic pressure control mechanism, and the structure comprises a longitudinal hollow shaft capable of driving a hollow rotating cap to directionally rotate, a spiral spring capable of generating liquid pressure on a No.1 piston plate and arranged in the longitudinal hollow shaft, an inner movable plate capable of changing the elastic strength of the spiral spring, and a threaded sleeve capable of changing the longitudinal position of the inner movable plate during directional rotation. The wind turbine gear box planetary gear manufacturing inner hole polishing equipment can polish the inner wall of the gear at multiple angles, thereby improving the polishing efficiency. In addition, the device can control the range of the polishing path, thereby improving the control ability of the equipment during the polishing process, and the device can provide buffer type pressure in the range of the polishing path, thereby providing continuous and stable polishing pressure.

Description

Technical Field

[0001] This invention relates to the field of grinding equipment technology, specifically to an internal grinding equipment for manufacturing planetary gears in wind turbine gearboxes. Background Technology

[0002] Grinding equipment, as the name suggests, is a device for processing irregular products. With the increasing popularity of mass production, manual manufacturing has been gradually replaced. In the field of gear processing and manufacturing, gear machining and grinding are very important. Gear machining and grinding is a fine process that requires high accuracy. Manual grinding often makes it difficult to guarantee processing precision and consistency. In order to improve the efficiency of gear processing production, people have made many improvements and refinements to gear grinding machines.

[0003] For example, Chinese patent publication number "CN219053813U" discloses "a grinding device for gear inner holes". Its main structure includes a grinding disc and a power device on the worktable; a clamping mechanism on the top of the grinding disc; a lifting mechanism on the worktable, with a support plate connected to the drive end; the grinding mechanism includes a first motor, a rotating rod, a mounting block, a motor gear, a rack, and a grinding strip. The motor gear and rack are rotatably and slidably mounted on the mounting block. The motor gear meshes with the rack. One end of the rack is connected to the grinding strip. The grinding end of the grinding strip can abut against the inner hole wall of the gear to be ground. One end of the mounting block is connected to the bottom of the support plate through a connecting rod. The first motor is mounted on the top of the support plate. The drive 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 inside the motor gear. The grinding strip is located directly above the inner hole of the gear to be ground. The rack can drive the grinding strip to move radially along the inner hole of the gear to be ground, grinding gears of different diameters.

[0004] It is evident that the aforementioned gear inner hole grinding equipment utilizes a first motor to drive a rotating rod, which in turn drives a motor gear to rotate, thereby moving a rack. This, in turn, causes the grinding strip to move radially along the inner hole of the gear to be ground and abut against the side wall of the inner hole of the gear to be ground, in order to accommodate gears with different hole diameters. However, in the actual grinding process, the design of its individual grinding strips leads to low grinding efficiency. At the same time, it relies on the meshing between gears to grind different hole diameters. During the grinding process, the gear structure cannot provide continuous and stable grinding pressure, resulting in poor grinding stability. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an internal grinding device for manufacturing planetary gears in wind turbine gearboxes. This device can grind the inner wall of the gear from multiple angles, thereby improving grinding efficiency. Furthermore, the device can control the range of the grinding path, thereby improving the control capability of the device during the grinding process. Within the grinding path range, the device can provide buffered pressure, thereby providing continuous and stable grinding pressure, thus solving the aforementioned technical problems.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an internal grinding device for manufacturing planetary gears in wind turbine gearboxes, comprising an array-type grinding mechanism, the structure of which includes a hollow rotating cap that can rotate and has a hollow internal structure, a first piston plate with three annular arrays that can move directionally under hydraulic pressure, a horizontal telescopic rod that can move laterally with the first piston plate, a curved connecting rod that moves with the horizontal telescopic rod and reduces the distance between the grinding end and the axis of the hollow rotating cap in a bending form, and a grinding column that moves with the curved connecting rod and grinds the internal hole of the gear; and an elastic pressure control mechanism, the structure of which includes a longitudinal hollow shaft that can drive the hollow rotating cap to rotate directionally, a helical spring placed inside the longitudinal hollow shaft and capable of generating liquid pressure on the first piston plate, an internal movable plate that can change the elastic strength of the helical spring, and a threaded sleeve that can change the longitudinal position of the internal movable plate during directional rotation.

[0007] Preferably, the array-type grinding mechanism further includes a first docking plate integrally disposed on the top of the hollow rotating cap. The hollow rotating cap has a first hydraulic chamber with an open top. Three horizontally arranged hollow shafts are arranged in a ring on the circumferential side of the hollow rotating cap. Each horizontally hollow shaft has a horizontally movable cavity inside. One end of each horizontally movable cavity is connected to the side of the first hydraulic chamber through a first hydraulic hole. The other end of each horizontally movable cavity is connected to the external space through a first rod perforation. Each horizontally movable cavity contains a... A first piston plate capable of moving along its axial direction has a horizontal telescopic rod fixedly installed at one end of the first piston plate facing the through hole of the first rod body. A limiting protrusion is fixedly installed at the end of the horizontal telescopic rod. A curved connecting rod bent towards the axis of the hollow rotating cap is fixedly installed on the bottom side of the limiting protrusion. A longitudinal grinding column is fixedly installed at the bottom end of the curved connecting rod. A base shaft is installed at the bottom of the hollow rotating cap. A concave central reference hole and a side reference hole are respectively provided at the center of the bottom end of the base shaft and the grinding column.

[0008] Preferably, the centerline of the hollow rotating cap and the centerline of the base shaft are on the same vertical line, and the centerline of the base shaft is parallel to the centerline of the grinding column.

[0009] Preferably, the structural shape of the perforated cross section of the first rod is consistent with the structural shape of the cross section of the horizontal telescopic rod, both being polygonal structures, and the structural dimensions of the perforated cross section of the first rod match the structural dimensions of the cross section of the horizontal telescopic rod.

[0010] Preferably, the elastic pressure control mechanism further includes a rotor coupling integrally disposed at the top of the longitudinal hollow shaft. A second docking plate, fixedly connected to a first docking plate, is disposed at the bottom end of the longitudinal hollow shaft. Two symmetrical upper and lower limiting protrusions are disposed around the upper half of the longitudinal hollow shaft. An upper longitudinal movable cavity is disposed inside the middle half of the longitudinal hollow shaft. A second rod through-hole is disposed at the bottom end of the upper longitudinal movable cavity. A longitudinal sliding groove is disposed on each of the symmetrical sides of the upper longitudinal movable cavity. A lower longitudinal movable cavity is disposed at the bottom end of the second rod through-hole. A second liquid hole, with an open bottom and a top connecting to the lower longitudinal movable cavity, is disposed at the center of the bottom end of the longitudinal hollow shaft. A second piston plate and a third piston plate, capable of moving along its axial direction, are disposed inside the lower longitudinal movable cavity. The piston plate is located directly above the third piston plate. A compressed helical spring is placed between the second and third piston plates. An internal movable plate capable of moving along its axial direction is placed inside the upper longitudinal movable cavity. A longitudinal movable rod passing through the hole of the second rod is fixedly installed at the bottom end of the internal movable plate. The bottom end of the longitudinal movable rod is fixedly connected to the upper surface of the second piston plate. A longitudinal sliding rod capable of sliding along the longitudinal groove is provided on both sides of the internal movable plate. The bottom cylinder of the threaded sleeve is installed in the annular hole of a hollow mounting ring through a bearing. The bottom of the hollow mounting ring is fixedly connected to the longitudinal sliding rod through a longitudinal connecting rod. The center of the threaded sleeve is provided with a first internal thread hole that is connected to the shaft between the two limiting protrusions through a first thread structure.

[0011] Preferably, the first thread structure includes an internal thread structure disposed on the inner wall of the first internal thread hole and an external thread structure disposed between the two limiting protrusions, and the internal thread structure matches the external thread structure.

[0012] Preferably, the closed area formed by the No. 3 piston plate, the lower longitudinal movable cavity, the No. 2 liquid hole, the No. 1 hydraulic cavity, the No. 1 liquid hole, the horizontal movable cavity, and each No. 1 piston plate is filled with an appropriate amount of buffer solution.

[0013] Preferably, it also includes three grinding size control mechanisms, the structure of which includes an abutting limiting plate located directly above the limiting protrusion and capable of limiting the limiting protrusion, a movable base capable of driving the abutting limiting plate to move along the moving direction of the limiting protrusion, and an external threaded rod capable of moving the movable base when rotating.

[0014] Preferably, the grinding size control mechanism further includes an arc-shaped fixing plate fixedly installed on the circumferential surface of the longitudinal hollow shaft. The outer convex surface of the arc-shaped fixing plate is provided with a horizontal connecting rod integrally formed therewith. A longitudinal first side guard plate is installed at the end of the horizontal connecting rod. A horizontal horizontal slide rod is fixedly installed at one end of the first side guard plate. A second side guard plate is fixedly installed at the end of the horizontal slide rod. Two rotatable horizontal shafts are installed in the first and second side guard plates through bearings. External threaded rods are fixedly installed at the opposite ends of the two horizontal shafts through a rod coupling. A hexagonal knob head is fixedly installed at the other end of one of the horizontal shafts. A horizontal sliding hole that can slide along the horizontal slide rod is provided inside the movable base. A second internal threaded hole that is installed at the body of the external threaded rod through a second threaded structure is provided inside the movable base. An abutment limiting plate is fixedly installed at the bottom end of the movable base.

[0015] Preferably, the second thread structure includes an internal thread structure disposed on the inner wall of the second internal thread hole and an external thread structure disposed on the external thread rod body, and the internal thread structure matches the external thread structure.

[0016] Compared with the prior art, the present invention provides an internal hole grinding device for manufacturing planetary gears in wind turbine gearboxes, which has the following beneficial effects:

[0017] 1. It can perform multi-angle grinding on the inner wall of gears, thereby improving grinding efficiency. In addition, the device can control the range of the grinding path, thereby improving the control capability of the equipment during the grinding process. Furthermore, within the grinding path range, the device can provide buffered pressure, thereby providing continuous and stable grinding pressure.

[0018] 2. Equipped with an array-type grinding mechanism, it uses a hollow rotating cap to carry three sets of horizontally arranged horizontal pistons, horizontal telescopic rods, and curved connecting rods to drive the longitudinal grinding columns to rotate synchronously. The polygonal rod hole structure prevents the telescopic rods from rotating on their own. The three grinding columns synchronously cover the inner wall of the gear hole at multiple angles, eliminating grinding blind spots. Compared with a single grinding strip structure, this significantly improves grinding efficiency. With the base shaft and the reference hole at the bottom of the grinding column, the radial dimension of the grinding can be quickly calibrated with calipers. The curved connecting rod structure can flexibly adjust the radial extension distance of the grinding column to adapt to different radial machining requirements of the planetary gear inner hole. The hydraulic drive extension and retraction response is uniform, and the overall rotational grinding motion is stable.

[0019] 3. An elastic pressure control mechanism is provided, relying on the compression of the spiral springs by the second and third pistons inside the longitudinal hollow shaft to provide the pressure source. The fully enclosed buffer chamber evenly transmits the spring force to each of the first piston plates. Rotating the threaded sleeve can drive the longitudinal displacement of the built-in movable plate. Changing the spring compression amount can achieve stepless adjustment of the grinding pressure. During the grinding process, the buffer solution forms a flexible buffer pressure to avoid over-wearing and scratching of the gear inner wall caused by rigid pressure. The longitudinal slide groove and slide rod limit ensure that the built-in movable plate only moves in a straight line. The threaded sleeve bearing installation structure ensures that the adjustment of force does not interfere with the rotation of the spindle, and can continuously output stable and uniform grinding contact pressure, improving the surface finish and processing consistency of the inner hole.

[0020] 4. Equipped with a grinding dimension control mechanism, fixed to the main shaft by an arc-shaped fixing plate, the external threaded rod is rotated by a hexagonal knob, driving the movable base with a horizontal sliding hole to move along the sliding rod. The bottom end abuts against the limit plate to precisely limit the maximum extension stroke of the limit protrusion. With the help of the equipment's reference hole and calipers, the maximum processing radius of the grinding column can be accurately calibrated, achieving precise and controllable grinding diameter of the gear inner hole. The threaded transmission adjustment is simple to operate, and the positioning is stable with self-locking. Three sets of independent limit structures ensure that the radial stroke of the three grinding columns is synchronized, effectively controlling the grinding path range and preventing over-size processing. It is suitable for processing the inner holes of various specifications of wind power planetary gears, and the equipment's dimension control capability is significantly improved. Attached Figure Description

[0021] Figure 1 This is a perspective view of the present invention;

[0022] Figure 2 This is a three-dimensional cross-sectional view of the present invention;

[0023] Figure 3 This is a perspective view of the array-type polishing mechanism in this invention;

[0024] Figure 4 This is a three-dimensional cross-sectional view of the array-type grinding mechanism in this invention;

[0025] Figure 5 This is a perspective view of the elastic pressure control mechanism in this invention;

[0026] Figure 6 This is a three-dimensional cross-sectional view of the elastic pressure control mechanism in this invention;

[0027] Figure 7 This is a perspective view of the grinding size control mechanism in this invention;

[0028] Figure 8 This is a three-dimensional cross-sectional view of the grinding size control mechanism in this invention.

[0029] The components include: 1. Array-type grinding mechanism; 11. Hollow rotating cap; 12. No. 1 docking plate; 13. No. 1 hydraulic chamber; 14. Horizontal hollow shaft; 15. Horizontal movable chamber; 16. No. 1 liquid hole; 17. No. 1 rod body through hole; 18. No. 1 piston plate; 19. Horizontal telescopic rod; 110. Limiting protrusion; 111. Curved connecting rod; 112. Grinding column; 113. Base shaft; 114. Central reference hole; 115. Side reference hole; 2. Elastic pressure control mechanism; 21. Longitudinal hollow shaft; 22. Rotor coupling; 23. Limiting protrusion ring; 24. Upper longitudinal movable chamber; 25. Longitudinal groove; 26. No. 2 rod body through hole; 27. Lower longitudinal movable chamber; 28. No. 2 liquid hole; 29. 210. No. 2 docking plate; 211. Built-in movable plate; 212. Threaded sleeve; 213. No. 1 internal threaded hole; 214. Hollow mounting ring; 215. Longitudinal connecting rod; 216. Longitudinal movable rod; 217. No. 2 piston plate; 218. No. 3 piston plate; 219. Helical spring; 3. Grinding size control mechanism; 31. Arc-shaped fixed plate; 32. Horizontal connecting rod; 33. No. 1 side guard plate; 34. No. 2 side guard plate; 35. Horizontal sliding rod; 36. Horizontal rotating shaft; 37. Hexagonal knob head; 38. Rod coupling; 39. External threaded rod; 310. Moving base; 311. Horizontal sliding hole; 312. No. 2 internal threaded hole; 313. Abutment limit plate. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Please see Figure 1 and Figure 2 A grinding device for the inner hole of planetary gears in a wind turbine gearbox is described. When adjusting the grinding dimensions, a horizontal center distance caliper is used. The two conical reference points of the horizontal center distance caliper are respectively inserted into the center reference hole 114 and the side reference hole 115. The measured value plus the structural radius of the grinding column 112 is the grinding dimension of the grinding column 112. At the same time, the rotor coupling 22 is fixedly connected to the rotor end of a drive motor. Finally, the gear to be ground is clamped in a fixed three-jaw chuck, which completes the preparation work before grinding.

[0032] To achieve rapid grinding of the gear's inner bore, please refer to [link / reference needed]. Figure 1 , Figure 2 , Figure 3 and Figure 4An array-type grinding mechanism 1 is required, the structure of which includes a hollow rotating cap 11 that can rotate and has a hollow internal structure, a first piston plate 18 with three ring arrays that can move in a directional manner under hydraulic pressure, a horizontal telescopic rod 19 that can move laterally with the first piston plate 18, a curved connecting rod 111 that moves with the horizontal telescopic rod 19 and reduces the distance between the grinding end and the axis of the hollow rotating cap 11 in a bending form, and a grinding column 11 that moves with the curved connecting rod 111 and grinds the inner hole of the gear. 2. The longitudinal hollow shaft 21 drives the hollow rotating cap 11 to rotate, and the hollow rotating cap 11 can drive the three horizontal telescopic rods 19 and the curved connecting rod 111 to rotate synchronously and quickly through the horizontal hollow shaft 14. Finally, the three grinding pillars 112 will revolve around the base shaft 113 in the inner hole of the gear. When the grinding surface of the grinding pillar 112 contacts the inner wall of the gear, it can effectively grind the inner wall of the gear. Due to the synchronous work of the three grinding pillars 112, the grinding efficiency of the gear can be effectively accelerated.

[0033] For details regarding the specific structure of the array-type polishing mechanism 1, please refer to [link / reference]. Figure 3 and Figure 4It also includes a first docking plate 12 integrally disposed on the top of the hollow rotating cap 11. The hollow rotating cap 11 has a first hydraulic chamber 13 with an open top. The circumferential side of the hollow rotating cap 11 is provided with three horizontal hollow shafts 14 arranged in a ring array. Each horizontal hollow shaft 14 has a horizontal movable cavity 15 inside. One end of the horizontal movable cavity 15 is connected to the side of the first hydraulic chamber 13 through a first liquid hole 16. The other end of the horizontal movable cavity 15 is connected to the external space through a first rod through hole 17. Each horizontal movable cavity 15 has a first piston plate 18 that can move along its axial direction. A return spring (not shown in the figure) is provided between the outer circumferential wall of the first piston plate 18 and the inner wall of the horizontal movable cavity 15. The return spring is in a normal or compressed state to provide an elastic restoring force to return the first piston plate 18 to the axis of the hollow rotating cap 11. The first piston plate 18 is fixedly mounted at the end facing the first rod through hole 17. A horizontal telescopic rod 19 with a through hole 17 penetrating the first rod body is provided. A limiting protrusion 110 is fixedly installed at the end of the horizontal telescopic rod 19. A curved connecting rod 111, which bends toward the axis of the hollow rotating cap 11, is fixedly installed on the bottom side of the limiting protrusion 110. A longitudinal grinding column 112 is fixedly installed at the bottom end of the curved connecting rod 111. A base shaft 113 is installed at the bottom of the hollow rotating cap 11. The base shaft 113 and the grinding column 112 are respectively provided with concave structures at the center of their bottom ends. The central reference hole 114 and the side reference hole 115, the axis of the hollow rotating cap 11 and the axis of the base shaft 113 are on the same vertical line, and the axis of the base shaft 113 is parallel to the axis of the grinding column 112. The cross-sectional shape of the first rod through hole 17 is consistent with the cross-sectional shape of the horizontal telescopic rod 19, both being polygonal structures, and the cross-sectional dimensions of the first rod through hole 17 match the cross-sectional dimensions of the horizontal telescopic rod 19.

[0034] To provide controlled polishing pressure, please refer to [link / reference]. Figure 1 , Figure 2 , Figure 5 and Figure 6A flexible pressure control mechanism 2 needs to be set up. Its structure includes a longitudinal hollow shaft 21 that can drive the hollow rotating cap 11 to rotate in a specific direction; a helical spring 219 placed inside the longitudinal hollow shaft 21 and capable of generating liquid pressure on the first piston plate 18; an internal movable plate 210 that can change the elastic strength of the helical spring 219; and a threaded sleeve 211 that can change the longitudinal position of the internal movable plate 210 during directional rotation. During grinding, the drive motor is started, and its rotor drives the longitudinal hollow shaft 21 to rotate. The longitudinal hollow shaft 21 can transmit this rotational tendency, thereby driving the hollow rotating cap 11 to rotate, thus achieving power transmission. When it is necessary to adjust the grinding pressure, the threaded sleeve 211 rotates in a specific direction. Due to the connection of the first thread structure, the threaded sleeve 21... 1. The hollow mounting ring 213 and the longitudinal connecting rod 214 drive the built-in movable plate 210 to move longitudinally. The built-in movable plate 210 drives the second piston plate 217 to move longitudinally through the longitudinal movable rod 216, thereby changing the distance between the second piston plate 217 and the third piston plate 218. At the same time, it changes the elastic force of the helical spring 219 on the third piston plate 218. This elastic force is transmitted to the first piston plate 18 through the buffer solution. Finally, under the transmission of force, the pressure between the grinding column 112 and the gear inner hole is changed. During the grinding process, the pressure of the buffer solution comes from the helical spring 219, thereby making the grinding column 112 generate a continuous and stable grinding pressure on the inner wall of the gear, so as to ensure the effective grinding of the inner wall of the gear by the grinding column 112.

[0035] For details regarding the specific structure of the elastic pressure control mechanism 2, please refer to [link / reference]. Figure 5 and Figure 6It also includes a rotor coupling 22 integrally disposed at the top of the longitudinal hollow shaft 21. The bottom end of the longitudinal hollow shaft 21 is provided with a second docking plate 29 fixedly connected to the first docking plate 12. The upper half of the longitudinal hollow shaft 21 has two symmetrically positioned limiting protrusions 23 on its outer periphery. The middle half of the longitudinal hollow shaft 21 has an upper longitudinal movable cavity 24 inside. The bottom end of the upper longitudinal movable cavity 24 has a second rod through hole 26. A longitudinal sliding groove 25 is provided on each of the symmetrical sides of the upper longitudinal movable cavity 24. The bottom end of the second rod through hole 26 is provided with... A lower longitudinal movable cavity 27 is provided. A second liquid hole 28, with an open bottom and a top end connected to the lower longitudinal movable cavity 27, is provided at the center of the bottom end of the longitudinal hollow shaft 21. A second piston plate 217 and a third piston plate 218, capable of moving along its axial direction, are placed inside the lower longitudinal movable cavity 27. The second piston plate 217 is located directly above the third piston plate 218. A compressed helical spring 219 is placed between the second piston plate 217 and the third piston plate 218. An internal movable plate, capable of moving along its axial direction, is placed inside the upper longitudinal movable cavity 24. 210, a longitudinal movable rod 216 penetrating the through hole 26 of the second rod body is fixedly installed at the bottom end of the built-in movable plate 210. The bottom end of the longitudinal movable rod 216 is fixedly connected to the upper surface of the second piston plate 217. A longitudinal sliding rod 215 that can slide longitudinally along the longitudinal sliding groove 25 is respectively provided on both sides of the built-in movable plate 210. The bottom cylinder of the threaded sleeve 211 is installed in the annular hole of a hollow mounting ring 213 through a bearing. The bottom of the hollow mounting ring 213 is fixedly connected to the longitudinal sliding rod 215 through a longitudinal connecting rod 214. The threaded sleeve 211 The center of 11 is provided with a first internal thread hole 212 that is connected to the shaft between the two limiting convex rings 23 through a first thread structure. The first thread structure includes an internal thread structure set on the inner wall of the first internal thread hole 212 and an external thread structure set between the two limiting convex rings 23. The internal thread structure matches the external thread structure. The closed area formed by the third piston plate 218, the lower longitudinal movable cavity 27, the second liquid hole 28, the first hydraulic cavity 13, the first liquid hole 16, the horizontal movable cavity 15 and each first piston plate 18 is filled with an appropriate amount of buffer solution.

[0036] To achieve effective control over the grinding dimensions, please refer to Figure 1 , Figure 2 , Figure 7 and Figure 8Three grinding dimension control mechanisms 3 need to be set up. Their structure includes a contact limiting plate 313 located directly above the limiting protrusion 110 and capable of limiting the limiting protrusion 110; a movable base 310 capable of driving the contact limiting plate 313 to move along the moving direction of the limiting protrusion 110; and an external threaded rod 39 that allows the movable base 310 to move during rotation. The hexagonal knob heads 37 are rotated in a directional manner. Due to the connection of the second threaded structure and the limiting of the horizontal slide rod 35, the movement... The moving base 310 drives the contact limiting plate 313 to move in a direction. Then, observe the maximum distance between the central reference hole 114 and the side reference hole 115. When the sum of this distance and the structural radius of the grinding column 112 reaches the grinding distance of the gear inner hole, the grinding of the hexagonal knob head 37 can be stopped. During the grinding process, when the limiting protrusion 110 abuts against the corresponding end face of the contact limiting plate 313, the grinding column 112 can no longer move outward, which indicates that the grinding work is completed.

[0037] For details regarding the specific structure of the grinding size control mechanism 3, please refer to [link / reference]. Figure 7 and Figure 8 It also includes an arc-shaped fixing plate 31 fixedly installed on the circumferential surface of the longitudinal hollow shaft 21. The outer convex surface of the arc-shaped fixing plate 31 is provided with a horizontal connecting rod 32 integrally formed with it. The end of the horizontal connecting rod 32 is equipped with a longitudinal first side guard plate 33. A horizontal horizontal slide rod 35 is fixedly installed at one end of the first side guard plate 33. A second side guard plate 34 is fixedly installed at the end of the horizontal slide rod 35. Two rotatable horizontal rotating shafts 36 are installed in the first side guard plate 33 and the second side guard plate 34 through bearings. The two horizontal rotating shafts 36 are fixedly equipped with external threaded rods 39 at their opposite ends through a rod coupling 38. One of the horizontal rotating shafts 36 has a hexagonal knob head 37 fixedly installed at the other end. The movable base 310 has a horizontal sliding hole 311 that can slide along the horizontal sliding rod 35. The movable base 310 has a second internal thread hole 312 installed on the body of the external thread rod 39 through a second thread structure. The bottom end of the movable base 310 is fixedly installed with an abutment limiting plate 313. The second thread structure includes an internal thread structure set on the inner circumference of the second internal thread hole 312 and an external thread structure set on the body of the external thread rod 39, and the internal thread structure matches the external thread structure.

[0038] When in use, it is used in conjunction with a horizontal center distance caliper. The two conical reference points of the horizontal center distance caliper are respectively inserted into the center reference hole 114 and the side reference hole 115. The measured value plus the structural radius of the grinding column 112 is the grinding dimension of the grinding column 112. At the same time, the rotor coupling 22 is fixedly connected to the rotor end of a drive motor. Finally, the gear to be ground is clamped in a fixed three-jaw chuck.

[0039] Rotate each hexagonal knob head 37 in an orientation. Due to the connection of the No. 2 thread structure and the limitation of the horizontal slide bar 35, the moving base 310 drives the contact limiting plate 313 to move in an orientation. Then observe the maximum distance between the central reference hole 114 and the side reference hole 115. When the sum of this distance and the structural radius of the grinding column 112 reaches the grinding distance of the gear inner hole, the grinding of the hexagonal knob head 37 can be stopped.

[0040] When the grinding pressure needs to be adjusted, the threaded sleeve 211 is rotated in an directional manner. Due to the connection of the first thread structure, the threaded sleeve 211 drives the built-in movable plate 210 to move longitudinally through the hollow mounting ring 213 and the longitudinal connecting rod 214. The built-in movable plate 210 drives the second piston plate 217 to move longitudinally through the longitudinal movable rod 216, thereby changing the distance between the second piston plate 217 and the third piston plate 218. At the same time, the elastic force of the helical spring 219 on the third piston plate 218 is changed. This elastic force is then transmitted to the first piston plate 18 through the buffer solution. Finally, under the transmission of force, the pressure between the grinding column 112 and the gear inner hole is changed. During the grinding process, the pressure of the buffer solution comes from the helical spring 219, thereby making the grinding column 112 generate a continuous and stable grinding pressure on the inner wall of the gear, so as to ensure the effective grinding of the inner wall of the gear by the grinding column 112.

[0041] When the drive motor is started, its rotor drives the longitudinal hollow shaft 21 to rotate. The longitudinal hollow shaft 21 can transmit this rotational trend, thereby driving the hollow rotating cap 11 to rotate. The hollow rotating cap 11 can then drive the three horizontal telescopic rods 19 and the curved connecting rod 111 to rotate synchronously and rapidly through the horizontal hollow shaft 14. Finally, the three grinding pillars 112 will revolve around the base shaft 113 in the gear inner hole. When the grinding surface of the grinding pillar 112 contacts the inner wall of the gear, it can effectively grind the inner wall of the gear. During the grinding process, when the limiting protrusion 110 abuts against the corresponding end face of the limiting plate 313, the grinding pillar 112 can no longer move outward, which indicates that the grinding work is completed.

[0042] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An internal grinding device for manufacturing planetary gears in a wind turbine gearbox, characterized in that: include, The array-type grinding mechanism (1) includes a hollow rotating cap (11) that can rotate and has a hollow internal structure, a first piston plate (18) with three ring arrays that can move in a direction under hydraulic pressure, a horizontal telescopic rod (19) that can move laterally with the first piston plate (18), a curved connecting rod (111) that moves with the horizontal telescopic rod (19) and reduces the distance between the grinding end and the axis of the hollow rotating cap (11) in a curved form, and a grinding column (112) that moves with the curved connecting rod (111) and grinds the inner hole of the gear. And the elastic pressure control mechanism (2), the structure of which includes a longitudinal hollow shaft (21) that can drive the hollow rotating cap (11) to rotate in an directional manner, a helical spring (219) placed inside the longitudinal hollow shaft (21) and capable of generating liquid pressure on the first piston plate (18), an internal movable plate (210) that can change the elastic strength of the helical spring (219), and a threaded sleeve (211) that can change the longitudinal position of the internal movable plate (210) when rotating in an directional manner.

2. The internal grinding equipment for manufacturing planetary gears in a wind turbine gearbox according to claim 1, characterized in that: The array-type grinding mechanism (1) also includes a first docking plate (12) integrally disposed on the top of the hollow rotating cap (11). The hollow rotating cap (11) has a first hydraulic chamber (13) with an open top. The circumferential side of the hollow rotating cap (11) is provided with three horizontal hollow shafts (14) arranged in a ring array. Each horizontal hollow shaft (14) has a horizontal movable cavity (15) inside. One end of the horizontal movable cavity (15) is connected to the side of the first hydraulic chamber (13) through a first liquid hole (16). The other end of the horizontal movable cavity (15) is connected to the external space through a first rod through hole (17). Each horizontal movable cavity (15) has a first piston that can move along its axial direction inside. The first piston plate (18) has a horizontal telescopic rod (19) that passes through the first rod ...

3. The internal grinding equipment for manufacturing planetary gears in a wind turbine gearbox according to claim 2, characterized in that: The centerline of the hollow rotating cap (11) is on the same vertical line as the centerline of the base shaft (113), and the centerline of the base shaft (113) is parallel to the centerline of the grinding column (112).

4. The internal grinding equipment for manufacturing planetary gears in a wind turbine gearbox according to claim 3, characterized in that: The cross-sectional shape of the first rod through hole (17) is consistent with the cross-sectional shape of the horizontal telescopic rod (19), both being polygonal structures, and the structural dimensions of the cross-sectional shape of the first rod through hole (17) match the structural dimensions of the cross-sectional shape of the horizontal telescopic rod (19).

5. The internal grinding equipment for manufacturing planetary gears in a wind turbine gearbox according to claim 4, characterized in that: The elastic pressure control mechanism (2) also includes a rotor coupling (22) integrally disposed at the top of the longitudinal hollow shaft (21). The bottom end of the longitudinal hollow shaft (21) is provided with a second docking plate (29) fixedly connected to the first docking plate (12). The upper half of the longitudinal hollow shaft (21) is provided with two upper and lower symmetrical limiting protrusions (23). The middle half of the longitudinal hollow shaft (21) is provided with an upper longitudinal movable cavity (24). The bottom end of the upper longitudinal movable cavity (24) is provided with a second rod through hole (26). The upper longitudinal movable cavity (24) is provided with a longitudinal groove (25) on each of its symmetrical sides. The bottom end of the second rod through hole (26) is provided with a lower longitudinal movable cavity (27). The bottom center of the longitudinal hollow shaft (21) is provided with a second liquid hole (28) with an open bottom and a top end connected to the lower longitudinal movable cavity (27). The lower longitudinal movable cavity (27) is equipped with a second piston plate (217) and a third piston plate (218) that can move along its axial direction. The second piston plate (217) is located in the third piston plate. Above the first piston plate (218), a compressed helical spring (219) is placed between the second piston plate (217) and the third piston plate (218). An internal movable plate (210) capable of axial movement is placed inside the upper longitudinal movable cavity (24). A longitudinal movable rod (216) penetrating the second rod body through the through hole (26) is fixedly installed at the bottom end of the internal movable plate (210). The bottom end of the longitudinal movable rod (216) is fixedly connected to the upper surface of the second piston plate (217). On both sides of the moving plate (210), there is a longitudinal slide rod (215) that can slide longitudinally along the longitudinal slide groove (25). The bottom cylinder of the threaded sleeve (211) is installed in the annular hole of a hollow mounting ring (213) through a bearing. The bottom of the hollow mounting ring (213) is fixedly connected to the longitudinal slide rod (215) through a longitudinal connecting rod (214). The center of the threaded sleeve (211) is provided with a first internal thread hole (212) that is connected to the shaft between the two limiting protrusions (23) through a first thread structure.

6. The internal grinding equipment for manufacturing planetary gears in a wind turbine gearbox according to claim 5, characterized in that: The first thread structure includes an internal thread structure located on the inner circumference of the first internal thread hole (212) and an external thread structure located between the two limiting protrusions (23), and the internal thread structure matches the external thread structure.

7. The internal grinding equipment for manufacturing planetary gears in a wind turbine gearbox according to claim 6, characterized in that: The closed area formed by the No. 3 piston plate (218), the lower longitudinal movable cavity (27), the No. 2 liquid hole (28), the No. 1 hydraulic cavity (13), the No. 1 liquid hole (16), the horizontal movable cavity (15), and each No. 1 piston plate (18) is filled with an appropriate amount of buffer solution.

8. The internal grinding equipment for manufacturing planetary gears in a wind turbine gearbox according to claim 7, characterized in that: It also includes three grinding size control mechanisms (3), the structure of which includes an abutting limiting plate (313) located directly above the limiting protrusion (110) and capable of limiting the limiting protrusion (110), a movable base (310) capable of driving the abutting limiting plate (313) to move along the moving direction of the limiting protrusion (110), and an external threaded rod (39) capable of moving the movable base (310) when rotating.

9. The internal grinding equipment for manufacturing planetary gears in a wind turbine gearbox according to claim 8, characterized in that: The grinding size control mechanism (3) further includes an arc-shaped fixing plate (31) fixedly installed on the circumferential surface of the longitudinal hollow shaft (21). The outer convex surface of the arc-shaped fixing plate (31) is provided with a horizontal connecting rod (32) integral with it. The end of the horizontal connecting rod (32) is equipped with a longitudinal first side guard plate (33). One end of the first side guard plate (33) is fixedly installed with a horizontal horizontal slide rod (35). The end of the horizontal slide rod (35) is fixedly installed with a second side guard plate (34). Two rotatable water bearings are installed in the first side guard plate (33) and the second side guard plate (34). A horizontal rotating shaft (36) is fixedly mounted with an external threaded rod (39) at opposite ends via a rod coupling (38). A hexagonal knob head (37) is fixedly mounted at the other end of one of the horizontal rotating shafts (36). A horizontal sliding hole (311) that can slide along a horizontal sliding rod (35) is provided inside the movable base (310). A second internal threaded hole (312) that is installed at the rod body of the external threaded rod (39) via a second thread structure is provided inside the movable base (310). An abutment limiting plate (313) is fixedly mounted at the bottom end of the movable base (310).

10. The internal grinding equipment for manufacturing planetary gears in a wind turbine gearbox according to claim 9, characterized in that: The second thread structure includes an internal thread structure located on the inner circumference of the second internal thread hole (312) and an external thread structure located on the body of the external thread rod (39), and the internal thread structure matches the external thread structure.

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