A planetary gear grinding device and grinding method

Abstract

The present invention discloses a planetary gear processing grinding device and grinding method, and provides a planetary gear processing grinding device, comprising: a grinding table; a reduction motor fixedly arranged on one side of the inner cavity top of the grinding table; a first rotating shaft, the output end of the reduction motor is locked with the first rotating shaft through a coupling, and the top of the grinding table is extended from the top of the first rotating shaft; a rotating rod, the top of the grinding table is provided with strip holes in the left and right directions on both the front and rear sides, and the inner cavity of the strip hole is plugged with a rotating rod; a rotating wheel, the top of the first rotating shaft and the rotating rod are both provided with a rotating wheel. The planetary gear processing grinding device and grinding method can fix planetary gears of different diameters on the rotating wheel by providing a movable clamping mechanism, and can ensure that the fixation is firm. Under the manipulation of a driving rotating wheel and two driven rotating wheels, the planetary gears are caused to rotate in a circle, which provides convenience for grinding the internal teeth.

Description

Technical Field

[0001] The present invention relates to the technical field of planetary gear processing, and in particular to a grinding device and a grinding method for planetary gear processing. Background Art

[0002] Planetary gears refer to a gear system that, in addition to being able to rotate around its own axis like fixed-axis gears, also has its axis rotating along with the planet carrier around the axes of other gears. Rotation around its own axis is called rotation, and rotation around the axes of other gears is called revolution, just like the planets in the solar system, hence the name. Planetary gear transmission has many unique advantages over ordinary gear transmission. The most notable feature is that power can be split when transmitting power, and the input shaft and output shaft are on the same horizontal line. Therefore, planetary gear transmission is now widely used in reducers, speed increasers and speed change devices in various mechanical transmission systems.

[0003] Gears need to be polished after production to ensure their surface finish and precision. Some existing external gear polishing equipment can complete automatic polishing, but the internal teeth of the outer gear disk of the planetary gear are not easy to polish and need to be manually polished by staff. The labor intensity is extremely high and the operation is difficult, which can easily cause damage to personnel and parts. Summary of the Invention

[0004] The object of the present invention is to provide a planetary gear grinding device and a grinding method for machining planetary gears, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solutions: a planetary gear processing grinding device and a grinding method, providing a planetary gear processing grinding device, comprising:

[0006] grinding table;

[0007] A reduction motor is fixedly arranged on one side of the top end of the inner cavity of the grinding table;

[0008] A first rotating shaft, the output end of the reduction motor is locked with the first rotating shaft through a coupling, and the top end of the first rotating shaft extends out of the top end of the grinding table;

[0009] Rotating rod, the top of the grinding table is provided with strip holes on both the front and rear sides along the left and right directions, and the rotating rod is inserted into the inner cavity of the strip hole;

[0010] A rotating wheel, wherein the top of the first rotating shaft and the top of the rotating rod are both provided with a rotating wheel, the top of the first rotating shaft is fixedly connected to the rotating wheel, and the top of the rotating rod is rotatably connected to the rotating wheel;

[0011] A movable clamping mechanism is arranged in the inner cavity of the polishing table;

[0012] An internal gear grinding mechanism is provided on one side of the top end of the grinding table;

[0013] The planetary gear is clamped on the inner side of the rotating wheel.

[0014] Preferably, in order to clamp and fix the planetary gear, the mobile clamping mechanism includes: a first hydraulic cylinder, fixedly arranged on one side of the grinding table; a connecting plate, the bottom end of the rotating rod extends into the inner cavity of the grinding table, and a connecting plate is fixedly arranged between the inner bottom ends of the two rotating rods; a guide rod, guide rods are fixedly arranged on both the front and rear sides of the inner cavity of the grinding table, and the guide rods are adapted to be plugged into the connecting plate.

[0015] Preferably, the shape of the rotating wheel is "T"-shaped.

[0016] Preferably, a bolt is screwed on one side of the top end of the rotating wheel, a limit block is fixedly provided at the bottom end of the bolt, balls are inserted into the bottom end of the limit block and the inner bottom end of the rotating wheel, and the balls are in contact with the outer side of the planetary gear.

[0017] Preferably, the outer wall portion of the ball extends out of the lower surface of the limiting block.

[0018] Preferably, in order to grind the internal teeth of the planetary gear, the internal teeth grinding mechanism includes: a slider, a slide groove is opened at the top of the grinding table in the left and right directions, and a slider is inserted into the inner cavity of the slide groove, and the number of the sliders is two; a base, fixedly arranged at the top of the slider; an annular shell, fixedly arranged at the top of the base, and the inner side of the annular shell is through-shaped; a mounting seat, fixedly arranged on one side of the top of the grinding table; a second hydraulic cylinder, fixedly arranged on one side of the mounting seat, and one end of the second hydraulic cylinder is fixedly connected to one side of the base.

[0019] Preferably, the internal tooth grinding mechanism also includes: a grinding disc, which is plugged into the inner cavity of the annular shell, and the inner side of the grinding disc extends out of the inner cavity of the annular shell; an outer tooth disc, which is fixedly arranged on the outer side of the grinding disc; an annular limit strip, annular limit grooves are provided on both the front and rear sides of the inner cavity of the annular shell, and an annular limit strip is plugged into the inner cavity of the annular limit groove, and the annular limit strip is fixedly connected to the outer side of the outer tooth disc, wherein a notch is provided on one side of the outer wall of the grinding disc, the outer tooth disc and the annular limit strip.

[0020] Preferably, the internal tooth grinding mechanism also includes: a shell, a shell is fixedly provided on the upper and lower ends of the outer side of the annular shell and is communicated with the inner cavity of the annular shell; a strip shell is fixedly provided on the rear side of the shell along the up and down directions; a motor is fixedly provided on the top end of the rear side of the strip shell; a second rotating shaft, a second rotating shaft is rotatably provided on the upper and lower sides of the inner cavity of the strip shell along the front and back directions through bearings, and one end of the second rotating shaft extends into the inner cavity of the shell; a pulley is fixedly provided on the outer wall of the second rotating shaft; a belt is adapted to be matched with the two pulleys; a gear is keyed to the front side of the outer wall of the second rotating shaft, and the gear is meshed with the outer gear disk.

[0021] A planetary gear grinding method includes the following steps:

[0022] Step 1: Turn on the reduction motor, the first hydraulic cylinder, the second hydraulic cylinder, and the external power supply of the motor, control the first hydraulic cylinder to start, and push the connecting plate to move to the right, so that the connecting plate drives the rotating rod to move smoothly to the right under the restriction of the guide rod, thereby expanding the distance between the rotating wheels, placing the planetary gear to be polished on the balls of the three rotating wheels, and control the first hydraulic cylinder to start to drive the connecting plate box to move to the left, so that the three rotating wheels clamp and fix the planetary gear;

[0023] Step 2: Turn the bolt to move the limit block downward until the ball on the limit block is in contact with the planetary gear, thereby fixing the planetary gear to prevent it from loosening during the grinding process;

[0024] Step 3: Control the second hydraulic cylinder to start, and push the base to move to the left under the restriction of the slide groove and the slider, through the notch on one side of the annular housing, so that the annular housing and the grinding disc move to one side of the planetary gear, control the motor to start, so that the motor drives one of the second rotating shafts to rotate clockwise, so that the second rotating shaft drives the pulley to rotate, and under the transmission of the belt, the second rotating shaft and the pulley on the other side are rotated to drive the two gears to rotate clockwise, so that the two gears simultaneously shift the outer gear disc, so that the outer gear disc drives the grinding disc to rotate counterclockwise under the restriction of the annular limit groove and the annular limit strip, and according to the left and right position of the grinding disc, the grinding disc is ground with the inner teeth of the planetary gear during the rotation process;

[0025] Step 4: Control the reduction motor to start, and the reduction motor can drive the first shaft to rotate clockwise, so that one of the wheels rotates clockwise, so that the wheel drives the planetary gear to rotate through friction and the following of the other two wheels, so that the grinding disc can grind the inner teeth of the planetary gear 360 degrees.

[0026] The present invention provides a planetary gear grinding device and grinding method, which have the following beneficial effects:

[0027] 1. The present invention is capable of fixing planetary gears of different diameters on the rotating wheel by providing a movable clamping mechanism, and can ensure a firm fixation. Under the manipulation of a driving rotating wheel and two driven rotating wheels, the planetary gears are caused to rotate in a circular motion, providing convenience for grinding the internal teeth.

[0028] 2. The present invention is capable of controlling the rotation of the grinding disc by providing an internal gear grinding mechanism. By controlling the position of the grinding disc, the internal gears of the planetary gears can be automatically ground. The operation is simple, the labor intensity of the staff is reduced, and the grinding is safer. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of the present invention;

[0030] Figure 2 For the present invention Figure 1 A magnified view of point A in the figure;

[0031] Figure 3 For the present invention Figure 1 Enlarged view of point B in FIG.

[0032] Figure 4 This is a schematic diagram of the explosion structure of the runner of the present invention;

[0033] Figure 5 It is a front cross-sectional view of the grinding table of the present invention;

[0034] Figure 6 It is a right side cross-sectional view of the strip shell of the present invention;

[0035] Figure 7 It is a front cross-sectional view of the annular housing of the present invention.

[0036] In the figure: 1. grinding table; 2. reduction motor; 3. first rotating shaft; 4. rotating rod; 5. strip hole; 6. rotating wheel; 61. bolt; 62. limit block; 63. ball; 7. mobile clamping mechanism; 71. first hydraulic cylinder; 72. connecting plate; 73. guide rod; 8. internal gear grinding mechanism; 81. slider; 82. slide groove; 83. base; 84. annular shell; 85. mounting seat; 86. second hydraulic cylinder; 87. grinding disc; 88. outer gear disc; 89. annular limit strip; 810. annular limit groove; 811. shell; 812. strip shell; 813. motor; 814. second rotating shaft; 815. pulley; 816. belt; 817. gear; 9. planetary gear. DETAILED DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0038] See also Figure 1-7 The present invention provides a technical solution: a planetary gear processing grinding device and a grinding method, providing a planetary gear processing grinding device, including: a grinding table 1, a reduction motor 2, a first rotating shaft 3, a rotating rod 4, a strip hole 5, a rotating wheel 6, a mobile clamping mechanism 7, an internal gear grinding mechanism 8 and a planetary gear 9;

[0039] In order to control the rotation of one of the wheels 6, the reduction motor 2 is fixedly arranged on one side of the top inner cavity of the grinding table 1. The output end of the reduction motor 2 is locked with the first rotating shaft 3 through a coupling. The top of the grinding table 1 is extended from the top of the first rotating shaft 3. The front and back sides of the top of the grinding table 1 are provided with strip holes 5 in the left and right directions. The inner cavity of the strip hole 5 is plugged with a rotating rod 4. The top of the first rotating shaft 3 and the rotating rod 4 are both provided with a rotating wheel 6. The top of the first rotating shaft 3 is fixedly connected to the rotating wheel 6, and the top of the rotating rod 4 is rotatably connected to the rotating wheel 6. The rotating wheel 6 on the rotating rod 4 is a driven wheel. The mobile clamping mechanism 7 is arranged in the inner cavity of the grinding table 1, the internal tooth grinding mechanism 8 is arranged on one side of the top of the grinding table 1, and the planetary gear 9 is clamped on the inner side of the rotating wheel 6.

[0040] As a preferred solution, further, the mobile clamping mechanism 7 includes: a first hydraulic cylinder 71, a connecting plate 72 and a guide rod 73;

[0041] In order to control the left and right movement of the rotating wheel 6 as the driven wheel, a first hydraulic cylinder 71 is fixedly installed on one side of the grinding table 1. The bottom end of the rotating rod 4 extends into the inner cavity of the grinding table 1, and a connecting plate 72 is fixedly installed between the inner bottom ends of the two rotating rods 4.

[0042] In order to limit the rotating rod 4 , guide rods 73 are fixedly provided on both the front and rear sides of the inner cavity of the grinding table 1 , and the guide rods 73 are adapted to be plugged into the connecting plate 72 .

[0043] As a preferred solution, further, the shape of the runner 6 is “T”-shaped to facilitate positioning of the planetary gear 9 .

[0044] As a preferred solution, further, in order to fix the planetary gear 9 and prevent it from moving up and down, a bolt 61 is screwed on one side of the top of the runner 6, and a limit block 62 is fixed at the bottom end of the bolt 61. The bottom end of the limit block 62 and the inner bottom end of the runner 6 are both connected with balls 63, and the balls 63 are in contact with the outer side of the planetary gear 9. By providing the balls 63, the planetary gear 9 can rotate more smoothly.

[0045] As a preferred solution, further, the outer wall portion of the ball 63 extends out of the lower surface of the limiting block 62 to prevent the ball 63 from falling from the bottom end of the limiting block 62.

[0046] As a preferred embodiment, further, the internal gear grinding mechanism 8 includes: a slider 81, a slide 82, a base 83, an annular housing 84, a mounting seat 85, a second hydraulic cylinder 86, a grinding disc 87, an outer gear disc 88, an annular limiting strip 89, an annular limiting groove 810, a housing 811, a strip housing 812, a motor 813, a second rotating shaft 814, a pulley 815, a belt 816 and a gear 817;

[0047] In order to enable the annular housing 84 to translate left and right, a slide groove 82 is provided at the top of the grinding table 1 in the left and right directions, and a slider 81 is inserted into the inner cavity of the slide groove 82. The inner cavity of the slide groove 82 is in the shape of a dovetail groove, and the slider 81 is adapted to be inserted into the inner cavity of the slide groove 82. There are two sliders 81, and a base 83 is fixedly provided on the top of the slider 81. The annular housing 84 is fixedly provided on the top of the base 83, and the inner side of the annular housing 84 is through-shaped.

[0048] In order to control the movement of the annular shell 84, the mounting seat 85 is fixedly set on the top side of the grinding table 1, the second hydraulic cylinder 86 is fixedly set on one side of the mounting seat 85, and one end of the second hydraulic cylinder 86 is fixedly connected to one side of the base 83.

[0049] In order to support the grinding disc 87, the grinding disc 87 is plugged into the inner cavity of the annular shell 84, and the inner side of the grinding disc 87 extends out of the inner cavity of the annular shell 84. The outer toothed disc 88 is fixedly arranged on the outer side of the grinding disc 87. Annular limiting grooves 810 are provided on the front and back sides of the inner cavity of the annular shell 84, and an annular limiting strip 89 is plugged into the inner cavity of the annular limiting groove 810. The annular limiting strip 89 is fixedly connected to the outer side of the outer toothed disc 88, wherein a notch is provided on one side of the outer wall of the grinding disc 87, the outer toothed disc 88 and the annular limiting strip 89.

[0050] In order to control the rotation of gear 817 and toggle the outer gear disk 88, a shell 811 is fixedly provided at the upper and lower ends of the outer side of the annular shell 84 and is communicated with the inner cavity of the annular shell 84. The strip shell 812 is fixedly provided on the rear side of the shell 811 in the up and down directions, and the motor 813 is fixedly provided on the rear top end of the strip shell 812. The upper and lower sides of the inner cavity of the strip shell 812 are provided with a second rotating shaft 814 rotatable through bearings in the front and back directions. One end of the second rotating shaft 814 extends into the inner cavity of the shell 811, and the pulley 815 is fixedly provided on the outer wall of the second rotating shaft 814. The belt 816 is adapted to be matched with the two pulleys 815. Through the cooperation of the belt 816 and the pulley 815, the two gears 817 can be controlled to rotate synchronously. The gear 817 is keyed to the front side of the outer wall of the second rotating shaft 814, and the gear 817 is meshed with the outer gear disk 88. Under the continuous toggling of the gear 817 on the outer gear disk 88, the outer gear disk 88 can rotate continuously.

[0051] A planetary gear grinding method includes the following steps:

[0052] Step 1: Turn on the external power supply of the reduction motor 2, the first hydraulic cylinder 71, the second hydraulic cylinder 86 and the motor 813, control the first hydraulic cylinder 71 to start, and push the connecting plate 72 to move to the right, so that the connecting plate 72 drives the rotating rod 4 to move smoothly to the right under the restriction of the guide rod 73, thereby widening the distance between the running wheels 6, placing the planetary gear 9 to be polished on the balls of the three running wheels 6, and control the first hydraulic cylinder 71 to start, so as to drive the connecting plate 72 to move to the left, so that the three running wheels 6 clamp the planetary gear 9;

[0053] Step 2: Turn the bolt 61 to move the limit block 62 downward until the ball 63 on the limit block 62 is pressed into contact with the planetary gear 9 to fix the planetary gear 9 and prevent it from loosening during the grinding process;

[0054] Step 3: Control the second hydraulic cylinder 86 to start, and push the base 83 to move to the left under the restriction of the slide groove 82 and the slider 81, through the notch on one side of the annular housing 84, so that the annular housing 84 and the grinding disc 87 move to one side of the planetary gear 9, and control the motor 813 to start, so that the motor 813 drives one of the second rotating shafts 814 to rotate clockwise, so that the second rotating shaft 814 drives the pulley 815 to rotate, and under the transmission of the belt 816, the second rotating shaft 814 and the pulley 815 on the other side are rotated, so as to drive the two gears 817 to rotate clockwise, so that the two gears 817 simultaneously shift the outer gear disc 88, so that the outer gear disc 88 drives the grinding disc 87 to rotate counterclockwise under the restriction of the annular limit groove 810 and the annular limit strip 89, and according to the left and right position of the grinding disc 87, the grinding disc 87 grinds with the inner teeth of the planetary gear 9 during the rotation process;

[0055] Step 4: Control the reduction motor 2 to start, and the reduction motor 2 can drive the first rotating shaft 3 to rotate clockwise, so that one of the wheels 6 rotates clockwise, so that the wheel 6 drives the planetary gear 9 to rotate through friction and the following of the other two wheels 6, so that the grinding disc 87 can grind the inner teeth of the planetary gear 9 360 degrees. The operation is simple, reduces labor, and is conducive to wide promotion.

[0056] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A planetary gear grinding device, characterized in that: include: Grinding table (1); A reduction motor (2) is fixedly arranged on one side of the top end of the inner cavity of the grinding table (1); a first rotating shaft (3), wherein the output end of the reduction motor (2) is locked with the first rotating shaft (3) via a coupling, and the top end of the first rotating shaft (3) extends out of the top end of the grinding table (1); A rotating rod (4), wherein both the front and rear sides of the top of the grinding table (1) are provided with strip-shaped holes (5) along the left and right directions, and the rotating rod (4) is inserted into the inner cavity of the strip-shaped hole (5); A rotating wheel (6), wherein the top ends of the first rotating shaft (3) and the rotating rod (4) are both provided with a rotating wheel (6), the top end of the first rotating shaft (3) is fixedly connected to the rotating wheel (6), and the top end of the rotating rod (4) is rotatably connected to the rotating wheel (6); A movable clamping mechanism (7) is arranged in the inner cavity of the polishing table (1); An internal gear grinding mechanism (8) is arranged on one side of the top end of the grinding table (1); A planetary gear (9) is clamped on the inner side of the rotating wheel (6); The internal tooth grinding mechanism (8) comprises: Slider (81), the top of the grinding table (1) is provided with a slide groove (82) along the left and right directions, and the inner cavity of the slide groove (82) is plugged with a slider (81), and the number of the sliders (81) is two; A base (83) is fixedly arranged on the top of the slider (81); An annular shell (84) is fixedly arranged on the top of the base (83), and the inner side of the annular shell (84) is through-shaped; A mounting seat (85) is fixedly arranged on one side of the top end of the grinding table (1); A second hydraulic cylinder (86) is fixedly arranged on one side of the mounting seat (85), and one end of the second hydraulic cylinder (86) is fixedly connected to one side of the base (83); A grinding disc (87) is plugged into the inner cavity of the annular housing (84), and the inner side of the grinding disc (87) extends out of the inner cavity of the annular housing (84); An outer toothed disc (88) fixedly disposed on the outer side of the grinding disc (87); An annular limiting strip (89), an annular limiting groove (810) is provided on both the front and rear sides of the inner cavity of the annular shell (84), and an annular limiting strip (89) is inserted into the inner cavity of the annular limiting groove (810), and the annular limiting strip (89) is fixedly connected to the outer side of the outer toothed disc (88); wherein, a notch is provided on one side of the outer wall of the grinding disc (87), the outer toothed disc (88) and the annular limiting strip (89); A shell (811), wherein the upper and lower ends of the outer side of the annular shell (84) are fixedly provided with shells (811), and the shells (811) are communicated with the inner cavity of the annular shell (84); A strip-shaped shell (812) is fixedly arranged on the rear side of the housing (811) in the up-down direction; A motor (813) is fixedly arranged at the top end of the rear side of the strip-shaped housing (812); A second rotating shaft (814), wherein the upper and lower sides of the inner cavity of the strip shell (812) are both provided with second rotating shafts (814) rotatably arranged along the front-to-back direction via bearings, and one end of the second rotating shaft (814) extends into the inner cavity of the shell (811); A pulley (815) is fixedly mounted on the outer wall of the second rotating shaft (814); A belt (816) adapted to be coupled to the two pulleys (815); A gear (817) is key-connected to the front side of the outer wall of the second rotating shaft (814), and the gear (817) is meshed with the outer gear disc (88).

2. A planetary gear grinding device according to claim 1, characterized in that: The mobile clamping mechanism (7) comprises: A first hydraulic cylinder (71) is fixedly arranged on one side of the grinding table (1); A connecting plate (72), wherein the bottom end of the rotating rod (4) extends into the inner cavity of the grinding table (1), and a connecting plate (72) is fixedly provided between the inner bottom ends of the two rotating rods (4); Guide rods (73) are fixedly provided on both the front and rear sides of the inner cavity of the polishing table (1), and the guide rods (73) are adapted to be plugged into the connecting plate (72).

3. A planetary gear grinding device according to claim 2, characterized in that: The shape of the rotating wheel (6) is "T"-shaped.

4. A planetary gear grinding device according to claim 3, characterized in that: A bolt (61) is screwed onto one side of the top end of the rotating wheel (6), a limit block (62) is fixedly provided at the bottom end of the bolt (61), and balls (63) are inserted into the bottom end of the limit block (62) and the inner bottom end of the rotating wheel (6), and the balls (63) are in contact with the outer side of the planetary gear (9).

5. A planetary gear grinding device according to claim 4, characterized in that: The outer wall portion of the ball (63) extends beyond the lower surface of the limiting block (62).

6. The grinding method of a planetary gear grinding device according to claim 5, characterized in that: The following steps are involved: Step (1): connecting the external power supply of the reduction motor (2), the first hydraulic cylinder (71), the second hydraulic cylinder (86) and the motor (813), controlling the first hydraulic cylinder (71) to start, so as to push the connecting plate (72) to move to the right side, so that the connecting plate (72) drives the rotating rod (4) to move smoothly to the right side under the restriction of the guide rod (73), thereby expanding the spacing between the rotating wheels (6), placing the planetary gear (9) to be polished on the balls of the three rotating wheels (6), controlling the first hydraulic cylinder (71) to start, so as to drive the connecting plate (72) to move to the left side of the box, so that the three rotating wheels (6) clamp the planetary gear (9); Step (2): rotating the bolt (61) to move the limit block (62) downward until the ball (63) on the limit block (62) is in contact with the planetary gear (9) by compression, thereby fixing the planetary gear (9) to prevent it from loosening during the grinding process; Step (3): Control the second hydraulic cylinder (86) to start, and push the base (83) to move to the left under the restriction of the slide (82) and the slider (81), through the gap on one side of the annular shell (84), so that the annular shell (84) and the grinding disc (87) move to one side of the planetary gear (9), control the motor (813) to start, so that the motor (813) drives one of the second rotating shafts (814) to rotate clockwise, so that the second rotating shaft (814) drives the pulley (815) to rotate, and the belt (815) is rotated. 16), the second rotating shaft (814) and the pulley (815) on the other side are rotated to drive the two gears (817) to rotate clockwise, so that the two gears (817) simultaneously shift the outer toothed disc (88), so that the outer toothed disc (88) drives the grinding disc (87) to rotate counterclockwise under the restriction of the annular limiting groove (810) and the annular limiting strip (89), and according to the adjustment of the left and right positions of the grinding disc (87), the grinding disc (87) is ground with the inner teeth of the planetary gear (9) during the rotation process; Step (4): Control the reduction motor (2) to start, and the reduction motor (2) can drive the first rotating shaft (3) to rotate clockwise, so that one of the rotating wheels (6) rotates clockwise, so that the rotating wheel (6) drives the planetary gear (9) to rotate through friction and the following of the other two rotating wheels (6), so that the grinding disc (87) can grind the inner teeth of the planetary gear (9) 360 degrees.

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