CN101596697B - Mainshaft transmission system of numerically-controlled precise grinding polisher - Google Patents

Abstract

The invention relates to the technical field of numerically-controlled precise grinding polishers and particularly relates to a mainshaft transmission system of the numerically-controlled precise grinding polisher. The mainshaft transmission system comprises a main motor (1) arranged on a stand and a main supporting seat (2); the mainshaft transmission system is characterized in that a supporting sleeve (24) is arranged on the main supporting seat (2); the lower part of a lifting sleeve (36) is provided with a lifting mechanism (41); a gear ring sleeve (25) is arranged on the lifting sleeve (36); the gear ring sleeve (25) is provided with a gear ring driven gear (26); the inside of the supporting sleeve (24) is provided with a lower disc shaft (23) through a bearing; the inside of the lower disc shaft (23) is provided with a solar axle (22) through a bearing; the inside of the solar axle (22) is provided with a central axis (16) through a bearing; the upper part of the central axis (16) is fixedly connected with a dividing wheel (17) for driving an upper disc to rotate; and the lower part of the central axis (16) and the main supporting seat (2) are mounted and positioned through bearings. The mainshaft transmission system can be dragged by one or more servo motors, has wide speed regulation range, higher moving precision, rapider response speed and strong antijamming capacity.

Description

Spindle Drive System of CNC Precision Grinding and Polishing Machine

Technical field:

The invention relates to the technical field of numerically controlled precision grinding and polishing machines, and mainly relates to a spindle transmission system of a numerically controlled precision grinding and polishing machine. the

Background technique:

Traditional grinding and polishing machines are often driven by a single motor, and the transmission of the upper and lower polishing discs and the inner and outer ring gears is realized through a gear transmission system. There are only two speed ratios between the upper and lower polishing discs and the planetary wheels, which limits the change of the processing trajectory of the double-sided polishing machine. Lack of precise control over speed. the

Chinese patent 02292538.4, a double-sided polishing machine planetary disk, the planetary disk is provided with three eccentric holes, and three separators are respectively placed in the three eccentric holes. Through the improvement of the planetary disk, the polishing yield can be partially improved , and improve the polishing efficiency, but because it still adopts the traditional two-axis or three-axis transmission mode of the grinding and polishing machine, it cannot realize stepless speed regulation, cannot adjust the pressure of the upper polishing disc, the processing stability is poor, and the efficiency is also low. the

The Chinese invention patent with the application number of 200710068278.2 discloses a spindle transmission mechanism of a precision double-sided polishing machine, which uses the principle of four variable frequency motors to drive the upper and lower polishing discs and the inner and outer ring gears respectively to realize the transmission, and adopts the shaft sleeve structure , although the stepless speed regulation is realized, the soft start and soft stop of the processing process improve the working efficiency and processing accuracy of the polishing machine, but because the variable frequency motor needs to be controlled by a frequency converter, it has high requirements on the use conditions and slow dynamic response , poor anti-interference ability, not suitable for high-torque processing requirements; especially for high-precision grinding and polishing equipment, the manufacturing error of the shaft sleeve structure itself will also cause jumping and vibration of the upper and lower grinding discs, which cannot meet high-precision grinding and polishing equipment. and ultra-high precision processing requirements. the

Invention content:

The purpose of the present invention is to avoid the deficiencies of the prior art and provide a spindle drive system of a CNC precision grinding and polishing machine, which uses a servo motor to respectively drive the ring gear on the spindle of the grinding disc, and simultaneously implements closed-loop control of its motion. Thereby effectively meeting the requirements for the use of high-precision grinding and polishing machines. the

The purpose of the present invention can be achieved by adopting the following technical solutions: the main shaft transmission system of the numerical control precision grinding and polishing machine includes a main motor (1) and a main support (2) arranged on the frame, the main motor ( 1) It is connected with the main reduction box (3) on the main support (2) through the belt (30), and it is characterized in that: the support sleeve (24) is installed on the main support (2), and the lifting sleeve (36) is arranged on the outside of the supporting sleeve (24), and the lower part of the lifting sleeve (36) is provided with a lifting mechanism (41); the ring gear sleeve (25) is installed on the lifting sleeve (36) through the bearing (31), and the ring gear sleeve (25) ) is provided with a ring gear driven gear (26), the ring gear bracket (21) is fixedly installed on the upper part of the ring gear sleeve (25), the ring gear (20) is arranged on the ring gear bracket (21), and the support sleeve (24) The lower disc shaft (23) is housed through bearings inside, the upper part of the lower disc shaft (23) is fixedly equipped with a tray (15), and the lower disc (19) is arranged on the tray (15); the lower part of the lower disc shaft (23) is fixedly installed There is a lower plate driven gear (11), the inner of the lower plate shaft (23) is equipped with a sun gear shaft (22) through a bearing, the upper part of the sun gear shaft (22) is provided with a sun gear bracket (37), and on the sun gear bracket (37) A sun gear (18) is provided, and the lower end of the sun gear shaft (22) is fixedly provided with a sun gear driven gear (5); the inside of the sun gear shaft (22) is provided with a central shaft (16) through a bearing, and the upper part of the central shaft (16) is fixed Be connected with the thumb wheel (17) that drives the upper plate to rotate, the lower end of the central shaft (16) is fixedly connected with the upper plate driven gear (8), and the central shaft (16) bottom is installed and positioned by the bearing and the main support (2). the

The power output shaft of the main reduction box (3) on the main support (2) is provided with a power input gear (9), and the power input gear (9) is meshed with the drive gear (10) of the lower plate, and the lower plate The driving gear (10) meshes with the lower plate driven gear (11); the lower plate driving gear (10) is set on the power transmission shaft (4), and the power transmission shaft (4) is set on the main support (2) through the bearing On, the upper end of the power transmission shaft (4) is provided with the ring gear driving gear (27), the lower end of the power transmission shaft (4) is provided with the upper disk driving gear (6), and the upper disk driving gear (6) is connected with the main support ( 2) The first idler gear (7) on the top is meshed, and the first idler gear (7) is meshed with the upper plate driven gear (8). the

The described main support (2) is also provided with a sun gear motor (13), the sun gear motor (13) is connected with the sun gear reduction box (14), and the power output shaft of the sun gear reduction box (14) is provided with The sun gear driving gear (12), the sun gear driving gear (12) is meshed with the sun gear driven gear (5). the

The power output shaft of the main reduction box (3) on the main support (2) is provided with a power input gear (9), and the power input gear (9) is meshed with the drive gear (10) of the lower plate, and the lower plate The driving gear (10) meshes with the lower plate driven gear (11); the lower plate driving gear (10) is set on the power transmission shaft (4), and the power transmission shaft (4) is set on the main support (2) through the bearing On, the lower end of the power transmission shaft (4) is provided with an upper plate driving gear (6), and the upper plate driving gear (6) is meshed with the first idler gear (7) arranged on the main support (2), and the first idler The wheel (7) meshes with the upper plate driven gear (8). the

The main support (2) is also provided with a ring gear motor (28), the ring gear motor (28) is connected with the ring gear reduction box (29), and the power output shaft of the ring gear reduction box (29) is provided with The ring gear driving gear (32), the ring gear driving gear (32) is meshed with the ring gear driven gear (26). the

The frame is also provided with an upper disk motor (33), the upper disk motor (33) is connected to the upper disk reduction box (34) by a belt, and the power output shaft of the upper disk reduction box (34) is provided with an upper disk Driving gear (35), the upper plate driving gear (35) is meshed with the second idler gear (38), the second idler gear (38) is meshed with the upper plate driven gear (8), and the main support ( 2) The power output shaft of the upper main reduction box (3) is provided with a power input gear (9), the power input gear (9) meshes with the lower plate driving gear (10), and the lower plate driving gear (10) and the lower The disc driven gear (11) is meshed; the lower disc driving gear (10) is located on the power transmission shaft (4), and the power transmission shaft (4) is located on the main support (2) through a bearing. the

The power transmission shaft (4) is also provided with a duplex gear (40), and the duplex gear (40) meshes with the sun gear driven gear (5) at the lower end of the sun gear shaft (22). the

The lifting mechanism (41) is a screw nut lifting mechanism, including a lifting motor (42) arranged on the main support (2), the lifting motor (42) is connected with the lifting motor reduction box (43), and the lifting motor The power output shaft of the reduction box (43) is provided with a lifting gear (44), and the lifting gear (44) is engaged with the lifting idler gear (45) on the lifting idler shaft (46), and the lifting idler shaft (46) is set On the main support (2), the lifting idler gear (45) is engaged with the lifting ring gear (47) on the support sleeve (24), and the lifting ring gear (47) is engaged with the lifting ring gear (47) on the support sleeve (24). The pinion (49) on the leading screw (48) of the leading screw nut pair is engaged, and the leading screw (48) top links to each other with the lifting cover (36). the

Described lifting mechanism (41) is a cam lifting mechanism, includes cylinder (51), and cylinder (51) is installed on the main support (2) by cylinder mounting plate (51), and the plunger rod of cylinder (51) ( 52) The end is connected with one end of the rack (54) arranged in the positioning block (53). The ring gear on the external lifting cam (55) is engaged, and the lifting cam (55) is correspondingly provided with a lifting small shaft (56), and the lifting small shaft (56) is arranged on the lifting sleeve (36). the

The lower plate (19) and the tray (15) are provided with a dial pin (39), and the central shaft (16), the sun gear shaft (22), the lower plate shaft (23) and the support sleeve (24) are Concentric setting. the

The beneficial effects of the present invention are that the spindle transmission system of the CNC precision grinding and polishing machine can be driven by a single or multiple servo motors, and each servo motor can also be driven independently, so that the processing technology can be flexibly planned, and each step of the process The rotation speed and direction of each driving part in the center can be edited flexibly; so that the variable speed range is wide, the motion precision is higher, the response speed is faster, the anti-interference ability is strong, and it can better adapt to the requirements of different grinding materials and grinding processes, and realizes Soft start, soft stop, stable speed regulation, small impact, reliable operation, low maintenance and maintenance requirements. the

Description of drawings:

Fig. 1 is the structural representation of embodiment 1 of the present invention;

Fig. 2 is the structural representation of embodiment 2 of the present invention;

Fig. 3 is the structural representation of embodiment 3 of the present invention;

Fig. 4 is the structural representation of embodiment 4 of the present invention;

Fig. 5 is the schematic structural view of the screw nut lifting mechanism of embodiment 1 of the present invention;

Fig. 6 is the structural representation of the middle cam lifting mechanism of embodiment 5 of the present invention;

Fig. 7 is a schematic diagram of the partial structure of the present invention in the direction of A in Fig. 6 . the

Detailed ways:

Below in conjunction with the preferred embodiment shown in the accompanying drawings for further details:

Embodiment 1, see Fig. 1, 5, the main shaft transmission system of described CNC precision grinding and polishing machine includes the main motor 1 and the main support 2 that are arranged on the frame, and the main motor 1 is connected with the main motor 1 by the belt 30. The main reduction box 3 on the support 2 is connected, and its characteristic is that: the support sleeve 24 is installed on the main support 2, the lifting sleeve 36 is arranged on the outside of the support sleeve 24, and the lower part of the lifting sleeve 36 is provided with a lifting mechanism 41; The ring gear sleeve 25 is installed on the lifting sleeve 36 through the bearing 31. The ring gear sleeve 25 is provided with a ring gear driven gear 26. The ring gear bracket 21 is fixedly installed on the upper part of the ring gear sleeve 25. The ring gear 20 is arranged on the ring gear bracket 21. The lower disc shaft 23 is installed in the support sleeve 24 through bearings, the upper part of the lower disc shaft 23 is fixedly equipped with the tray 15, and the lower disc 19 is arranged on the tray 15; the lower part of the lower disc shaft 23 is fixedly provided with the lower disc driven gear 11, and the lower disc A sun gear shaft 22 is installed inside the disk shaft 23 through bearings, a sun gear bracket 37 is arranged on the upper part of the sun gear shaft 22, a sun gear 18 is arranged on the sun gear bracket 37, and a sun gear driven gear 5 is fixedly installed at the lower end of the sun gear shaft 22; The inside of the sun gear shaft 22 is provided with a central shaft 16 through a bearing. The upper part of the central shaft 16 is fixedly connected with a dial wheel 17 that drives the upper plate to rotate. The lower end of the central shaft 16 is fixedly connected with the upper plate driven gear 8. The main support 2 is installed and positioned. the

The power output shaft of the main reduction box 3 on the main support 2 is provided with a power input gear 9, the power input gear 9 meshes with the lower disk driving gear 10, and the lower disk driving gear 10 and the lower disk driven gear 11 The lower drive gear 10 is set on the power transmission shaft 4, the power transmission shaft 4 is set on the main support 2 through the bearing, the ring gear driving gear 27 is arranged on the upper end of the power transmission shaft 4, and the lower end of the power transmission shaft 4 The upper plate driving gear 6, the upper plate driving gear 6 is meshed with the first idler gear 7 arranged on the main support 2, and the first idler gear 7 is meshed with the upper plate driven gear 8. Described main support 2 is also provided with sun gear motor 13, and sun gear motor 13 links to each other with sun gear gearbox 14, and the power output shaft of sun gear gearbox 14 is provided with sun gear driving gear 12, and sun gear driving gear 12 meshes with sun gear driven gear 5. the

The lifting mechanism 41 is a screw nut lifting mechanism, including a lifting motor 42 arranged on the main support 2, the lifting motor 42 is connected with the lifting motor reduction box 43, and the power output shaft of the lifting motor reduction box 43 is provided with Lifting gear 44, the lifting gear 44 meshes with the lifting idler gear 45 located on the lifting idler shaft 46, the lifting idler shaft 46 is arranged on the main support 2, and the lifting idler 45 is connected with the lifting ring gear located on the supporting sleeve 24 47 is meshed, and the lifting ring gear 47 is meshed with the pinion 49 on the leading screw 48 of the leading screw nut pair on the support sleeve 24, and the leading screw 48 top is connected with the lifting cover 36. The lifting motor 42 engages with the lifting idler gear 45 through the lifting gear 44 on the power output shaft of the lifting motor reduction box 43, and the lifting idler gear 45 is engaged with the lifting ring gear 47 installed on the main support 2, and the lifting ring gear 47 is engaged with the small The gear 49 meshes, and the pinion 49 drives the lifting of the lifting sleeve 36 through its lead screw 48 . the

The lower plate 19 and the tray 15 are provided with dial pins 39 . The central shaft 16, the sun gear shaft 22, the lower disk shaft 23 and the support sleeve 24 are arranged concentrically. the

Embodiment 2, see Figure 2, differs from Embodiment 1 in that the power output shaft of the main reduction box 3 on the main support 2 is provided with a power input gear 9, and the power input gear 9 is connected with the lower plate driving gear 10 The lower plate driving gear 10 is meshed with the lower plate driven gear 11; the lower plate driving gear 10 is set on the power transmission shaft 4, the power transmission shaft 4 is set on the main support 2 through the bearing, and the lower end of the power transmission shaft 4 An upper disk driving gear 6 is provided, and the upper disk driving gear 6 meshes with the first idler gear 7 arranged on the main support 2 , and the first idler gear 7 meshes with the upper disk driven gear 8 . The main support 2 is also provided with a sun gear motor 13 and a ring gear motor 28, the sun gear motor 13 is connected with the sun gear reduction box 14, and the power output shaft of the sun gear reduction box 14 is provided with a sun gear driving gear 12 , the sun gear driving gear 12 meshes with the sun gear driven gear 5; the ring gear motor 28 is connected with the ring gear reduction box 29, and the power output shaft of the ring gear reduction box 29 is provided with a ring gear driving gear 32, and the ring gear driving gear 32 meshes with the ring gear driven gear 26. the

Embodiment 3, see Fig. 3, and embodiment 1 difference is that described frame is also provided with upper disk motor 33, and upper disk motor 33 links to each other with upper disk reduction box 34 by belt, and the power of upper disk reduction box 34 The output shaft is provided with an upper plate driving gear 35, and the upper plate driving gear 35 is meshed with the second idler gear 38, and the second idler gear 38 is meshed with the upper plate driven gear 8. The power output shaft of the reduction box 3 is provided with a power input gear 9, the power input gear 9 meshes with the lower disk driving gear 10, and the lower disk driving gear 10 meshes with the lower disk driven gear 11; the lower disk driving gear 10 is located at On the power transmission shaft 4, the power transmission shaft 4 is located on the main support 2 through bearings. The main support 2 is also provided with a sun gear motor 13 and a ring gear motor 28, the sun gear motor 13 is connected with the sun gear reduction box 14, and the power output shaft of the sun gear reduction box 14 is provided with a sun gear driving gear 12 , the sun gear driving gear 12 meshes with the sun gear driven gear 5; the ring gear motor 28 is connected with the ring gear reduction box 29, and the power output shaft of the ring gear reduction box 29 is provided with a ring gear driving gear 32, and the ring gear driving gear 32 meshes with the ring gear driven gear 26. the

Embodiment 4, see Figure 4, differs from Embodiment 1 in that the power output shaft of the main reduction box 3 on the main support 2 is provided with a power input gear 9, and the power input gear 9 is connected with the lower plate driving gear 10 The lower plate driving gear 10 is meshed with the lower plate driven gear 11; the lower plate driving gear 10 is set on the power transmission shaft 4, the power transmission shaft 4 is set on the main support 2 through the bearing, and the upper end of the power transmission shaft 4 Ring gear driving gear 27 is provided, and upper disk driving gear 6 is arranged at the lower end of power transmission shaft 4, and upper disk driving gear 6 meshes with the first idler gear 7 located on the main support 2, and the first idler gear 7 and the upper The disc driven gear 8 is meshed. The power transmission shaft 4 is also provided with a duplex gear 40 , and the duplex gear 40 meshes with the sun gear driven gear 5 at the lower end of the sun gear shaft 22 . The sun gear driven gear 5 is a double gear, and the double gear 40 is a slip gear. the

Embodiment 5, see Figures 6 and 7, is different from the above embodiment 1 in that the lifting mechanism 41 is a cam lifting mechanism, including a cylinder 51, and the cylinder 51 is installed on the main support 2 through the cylinder mounting plate 51 Above, the end of the plunger rod 52 of the cylinder 51 is connected with one end of the rack 54 arranged in the positioning block 53, the positioning block 53 is arranged on the main support 2, and the rack 54 is connected with the lifting cam 55 arranged outside the supporting sleeve 24. The ring gear on the top is meshed, and a small lifting shaft 56 is provided corresponding to the lifting cam 55, and the small lifting shaft 56 is arranged on the lifting sleeve 36. the

Claims (10)

1. A spindle drive system of a CNC precision grinding and polishing machine, comprising a main motor (1) and a main support (2) arranged on the frame, the main motor (1) is connected to the main support by a belt (30) The main reduction box (3) on the seat (2) is connected, and it is characterized in that: the support sleeve (24) is installed on the main support (2), and the lifting sleeve (36) is arranged on the outside of the support sleeve (24) , the lower part of the lifting sleeve (36) is provided with a lifting mechanism (41); the ring gear sleeve (25) is installed on the lifting sleeve (36) through the bearing (31), and the ring gear sleeve (25) is provided with a ring gear driven gear (26) , the ring gear bracket (21) is fixedly installed on the top of the ring gear sleeve (25), the ring gear (20) is located on the ring gear bracket (21), and the lower disc shaft (23) is housed in the support sleeve (24) through the bearing, The upper part of the lower disc shaft (23) is fixedly equipped with a tray (15), and the lower disc (19) is arranged on the tray (15); the lower part of the lower disc shaft (23) is fixedly provided with the lower disc driven gear (11), and the lower disc Axle (23) interior is equipped with sun gear shaft (22) by bearing, and the top of sun gear shaft (22) is provided with sun gear support (37), is provided with sun gear (18) on the sun gear support (37), and sun gear shaft (22 ) is fixed at the lower end of the sun gear driven gear (5); the sun gear shaft (22) is provided with a central shaft (16) through a bearing inside, and the upper part of the central shaft (16) is fixedly connected with a dial (17) that drives the upper plate to rotate , the lower end of the central shaft (16) is fixedly connected with the upper plate driven gear (8), and the central shaft (16) bottom is installed and positioned with the main support (2) by the bearing. 2. The main shaft transmission system of the numerically controlled precision grinding and polishing machine as claimed in claim 1 is characterized in that: the power output shaft of the main reduction box (3) on the described main support (2) is provided with a power input gear (9), the power input gear (9) meshes with the lower disk driving gear (10), and the lower disk driving gear (10) meshes with the lower disk driven gear (11); the lower disk driving gear (10) is located at the power On the power transmission shaft (4), the power transmission shaft (4) is arranged on the main support (2) through the bearing, the ring gear driving gear (27) is arranged on the power transmission shaft (4) upper end, and the power transmission shaft (4) lower end is provided with There is an upper plate driving gear (6), and the upper plate driving gear (6) meshes with the first idler gear (7) on the main support (2), and the first idler gear (7) and the upper plate driven gear (8) meshing. 3. the main shaft transmission system of numerical control precision grinding and polishing machine as claimed in claim 1 is characterized in that: also be provided with sun gear motor (13) on the described main support (2), sun gear motor (13) and The sun gear reduction box (14) links to each other, and the power output shaft of the sun gear reduction box (14) is provided with the sun gear driving gear (12), and the sun gear driving gear (12) is meshed with the sun gear driven gear (5). 4. The main shaft transmission system of the CNC precision grinding and polishing machine as claimed in claim 1 is characterized in that: the power output shaft of the main reduction box (3) on the described main support (2) is provided with a power input gear (9), the power input gear (9) meshes with the lower disk driving gear (10), and the lower disk driving gear (10) meshes with the lower disk driven gear (11); the lower disk driving gear (10) is located at the power On the power transmission shaft (4), the power transmission shaft (4) is arranged on the main support (2) through the bearing, and the lower end of the power transmission shaft (4) is provided with an upper disk driving gear (6), and the upper disk driving gear (6) is connected with the The first idler gear (7) which is arranged on the main support (2) is engaged, and the first idler gear (7) is engaged with the driven gear (8) of the upper plate. 5. The main shaft transmission system of the numerical control precision grinding and polishing machine as claimed in claim 4 is characterized in that: the sun gear motor (13) and the ring gear motor (28) are also provided on the described main support (2), The sun gear motor (13) is connected with the sun gear reduction box (14), and the power output shaft of the sun gear reduction box (14) is provided with a sun gear driving gear (12), and the sun gear driving gear (12) is connected with the sun gear driven gear. The gears (5) are meshed; the ring gear motor (28) links to each other with the ring gear reduction box (29), and the power output shaft of the ring gear reduction box (29) is provided with a ring gear driving gear (32), and the ring gear driving gear ( 32) Mesh with the ring gear driven gear (26). 6. The main shaft drive system of the numerically controlled precision grinding and polishing machine as claimed in claim 1, is characterized in that: the described frame is also provided with an upper plate motor (33), and the upper plate motor (33) is connected to the upper plate by a belt. The reduction box (34) is connected, and the power output shaft of the upper disk reduction box (34) is provided with an upper disk driving gear (35), and the upper disk driving gear (35) is meshed with the second idler gear (38), and the second idler gear The wheel (38) meshes with the driven gear (8) of the upper plate, and the power output shaft of the main reduction box (3) on the main support (2) is provided with a power input gear (9), and the power input gear (9) Engage with the lower plate driving gear (10), and the lower plate driving gear (10) meshes with the lower plate driven gear (11); the lower plate driving gear (10) is arranged on the power transmission shaft (4), The power transmission shaft (4) is located on the main support (2) through bearings. 7. The spindle drive system of the numerically controlled precision grinding and polishing machine as claimed in claim 2 is characterized in that: the described power transmission shaft (4) is also provided with a duplex gear (40), and the duplex gear (40) and The sun gear driven gear (5) at the lower end of the sun gear shaft (22) is meshed. 8. The spindle transmission system of a numerically controlled precision grinding and polishing machine according to claim 1, characterized in that: the lifting mechanism (41) is a screw nut lifting mechanism, including a Lift the motor (42), the lift motor (42) links to each other with the lift motor reduction box (43), and the power output shaft of the lift motor reducer box (43) is provided with a lift gear (44), and the lift gear (44) is connected with the lift gear The lifting idler gear (45) on the idler shaft (46) is meshed, and the lifting idler shaft (46) is arranged on the main support (2), and the lifting idler gear (45) and the lifting gear on the support sleeve (24) The ring (47) is engaged, and the lifting ring gear (47) is engaged with the pinion (49) on the lead screw (48) of the lead screw nut pair on the support sleeve (24), and the upper part of the lead screw (48) is in contact with the Lifting cover (36) links to each other. 9. The spindle drive system of a numerically controlled precision grinding and polishing machine as claimed in claim 1, characterized in that: said lifting mechanism (41) is a cam lifting mechanism, including a cylinder (51), and the cylinder (51) is installed through the cylinder The plate (51) is installed on the main support (2), the end of the plunger rod (52) of the cylinder (51) is connected with one end of the rack (54) arranged in the positioning block (53), and the positioning block (53) Set on the main support (2), the rack (54) meshes with the ring gear on the lifting cam (55) set outside the support sleeve (24), and a small lifting shaft is provided corresponding to the lifting cam (55) (56), the small shaft of lifting (56) is arranged on the lifting cover (36). 10. The spindle drive system of the numerically controlled precision grinding and polishing machine as claimed in claim 1, characterized in that: said lower plate (19) and tray (15) are provided with dial pins (39), and said central shaft (16), the sun gear shaft (22), the lower disk shaft (23) and the support sleeve (24) are arranged concentrically. the

Images