An eccentric spindle for a machine tool with high load-bearing capacity and high rotational speed

Abstract

An eccentric spindle for a machine tool with high load-bearing capacity and high rotational speed, which is composed of a spindle mechanism and a motor mechanism. It is characterized in that: the spindle mechanism includes a shaft core, a shaft core gland, a front outer retaining cover, a front gland, a sleeve flange, a front inner washer, a rear outer washer, a rear bearing washer, a bearing locking nut, a sleeve, and a sealing ring. The maximum rotational speed of the present invention is 4500 rpm, and there is an eccentricity between the shaft core rotating in the spindle box and the sleeve, reducing the cutting center distance and expanding the size of the cut monocrystalline silicon wafer to 210. The special bearing configuration enables the spindle to have the characteristics of high rotational speed, high load-bearing capacity, and low noise compared with the original spindle box. The sealing ring fits tightly with the shaft core gland and rotates frictionally to prevent impurities from entering the interior of the spindle. A very small number of impurities entering the front end adhere to the surface of the front gland. After the compressed air fills the air storage tank, it overflows from the air gap between the inner hole of the front outer retaining cover and the shaft core gland, taking away the impurities on the surface of the front gland and preventing them from entering the interior of the spindle.

Description

Technical Field

[0001] The present invention relates to the technical field of solar silicon wafer cutting, and specifically to an eccentric spindle of a machine tool with high load and high speed. Background Art

[0002] The photovoltaic manufacturing industry is developing well, the product quality is steadily improving, and the product categories are gradually becoming larger in size. Large-size silicon wafers have obvious advantages in terms of cost and efficiency, which can help downstream supporting manufacturers achieve cost reduction and efficiency improvement. 210 / 182 large-size silicon wafers are the new trend in the current industry. There is a large stock of slurry wire cutters, and the maximum processing size is M6 (166). Although the slurry wire cutter has a low cost, it has obvious disadvantages. On the one hand, the cutting speed is slow, the energy consumption ratio is low, and there is serious waste of slurry; on the other hand, due to the presence of the sandblasting device, it occupies a large cutting space, and the slurry pipeline is extremely easy to block. In order to keep up with the industry trend, manufacturers must transform the slurry wire cutter. High speed, high efficiency, and low cost are the transformation directions pursued by manufacturers. Summary of the Invention

[0003] The purpose of the present invention is to overcome the above deficiencies, and thus provide an eccentric spindle of a machine tool with high load and high speed, with a maximum linear speed of up to 40 m / s and a maximum rotational speed of 4500 rpm. Moreover, the axis core of the spindle box rotation is eccentric to the sleeve, reducing the cutting center distance and expanding the size of the cut single-crystalline silicon wafer to 210. The special bearing configuration enables the spindle to have the characteristics of high speed, high load, and low noise relative to the original spindle box.

[0004] The technical solution of the present invention is: an eccentric spindle of a machine tool with high load and high speed, which is composed of a spindle mechanism and a motor mechanism, and is characterized in that: the spindle mechanism includes an axis core, an axis core gland, a front outer retaining cover, a front gland, a sleeve flange, a front inner washer, a rear outer washer, a rear bearing washer, a bearing locking nut, a sleeve, and a sealing ring;

[0005] An inner spacer ring, an outer spacer ring, and a sleeve are sequentially sleeved on the middle part of the shaft core from inside to outside. On the front surface of the shaft core, a third bearing, a second bearing, a first bearing, a front inner washer, a front gland, and a shaft core gland are sequentially sleeved in the axial direction. The inner hole of the shaft core gland is matched with the shaft core, and the shaft core gland is connected to the shaft core through a safety pin. The outer ring of the front inner washer is sleeved with a sleeve, and a sleeve air passage is provided on the sleeve. The front gland is connected to the sleeve through screws, and the front gland is concentric with the inner holes of the shaft core and the sleeve. A front gland air passage is provided on the front gland. The inner hole of the front outer baffle is matched with the outer circle of the shaft core gland to form a plurality of labyrinth air gaps. The front outer baffle is matched with the front gland and fixed on the front gland through screws. The sealing ring is composed of a wear-resistant and high-temperature-resistant ductile material and is embedded in the front gland. The right end face of the sealing ring is in close contact with the shaft core gland. A gas storage tank is formed among the shaft core gland, the front outer baffle, the front gland, and the sealing ring. The outer ring of the front gland is sleeved with a sleeve flange, and the sleeve flange is connected to the sleeve through screws. A plurality of screw counterbores are provided on the sleeve flange for connecting to the machine table end face;

[0006] On the rear surface of the shaft core, a fourth bearing, a fifth bearing, a rear bearing washer, and a bearing locking nut are sequentially sleeved in the axial direction. The outer ring of the rear bearing washer is sleeved with a rear outer washer, and the outer ring of the bearing locking nut is sleeved with a rear cover. The rear outer washer is in surface contact with the fifth bearing. The rear cover presses the rear outer washer and is fixedly connected to the sleeve through screws. A rear cover air passage is provided on the rear cover. The bearing locking nut is threadedly fastened on the shaft core to lock the fourth bearing and the fifth bearing mounted on the shaft core. The outer ring of the rear cover is sleeved with a motor base flange. The inner hole of the motor base flange is matched with the outer circle of the rear cover, and the end face is in contact with the machine table end face. The motor base flange is fixedly connected to the sleeve through screws. The left side of the inner hole of the motor base flange is matched with a water jacket flange, and the left side of the motor base flange is fixedly connected to the water jacket flange through screws. A water jacket flange air passage is provided in the water jacket flange;

[0007] The motor mechanism includes a rotor shaft core, a rotor, a stator, a water jacket, a rotor locking nut, an encoder mounting seat, an encoder, and an encoder baffle. A rotor, a stator, and a water jacket are sequentially sleeved on the outer surface of the middle part of the rotor shaft core from inside to outside. The rotor is matched with the rotor shaft core, and the rotor locking nut is fastened on the rotor shaft core to press the rotor. The rotor shaft core is threadedly connected to the shaft core, and a plurality of set screws are provided on the side to ensure that the rotor shaft core does not loosen during the forward and reverse rotation of the shaft core. A sixth bearing is sleeved on the rear part of the rotor shaft core, and the sixth bearing is installed in a rear bearing seat, and the rear bearing seat is matched with the water jacket;

[0008] The rear bearing retaining ring is installed on the right end face of the rear bearing housing. The rear bearing retaining ring is fastened to the rear bearing housing by screws. The inner hole of the rear bearing housing houses the sixth bearing and the rear adjusting washer. A wave spring is provided between the sixth bearing and the rear adjusting washer. The encoder mounting seat is fixed to the left end face of the rear bearing housing, pressing the sixth bearing to make the wave spring in a pre-compressed length state. The inner hole of the encoder is sleeved on the rotor shaft core and fastened by several screws on the end face. The outer circle is fixed to the encoder mounting seat. The encoder cover is installed on the rear bearing housing by screws to protect the encoder.

[0009] Furthermore, there is a certain eccentric distance A between the shaft core and the sleeve. The inner hole of the sleeve of the sleeve is eccentric with the outer circle of the sleeve, and the eccentric distance is A.

[0010] Furthermore, a coolant inlet is provided at the upper part of the left end face of the rear bearing housing. The water jacket is provided with several evenly distributed water jacket water channels. After the coolant enters from the coolant inlet, it circulates axially in a circle to cool, reducing the heat of the stator installed inside the water jacket to achieve a cooling cycle.

[0011] Furthermore, an air inlet is provided at the lower part of the left end face of the rear bearing housing. The water jacket is provided with a water jacket air duct. Compressed air enters the main shaft interior from the air inlet, passes through the water jacket air duct, the water jacket flange air duct, the rear cover air duct, the sleeve air duct, and the front gland air duct, and enters the air storage tank.

[0012] The beneficial effects of the present invention are:

[0013] 1. The maximum linear speed can reach 40 m / s, the maximum rotational speed is 4500 rpm, and the shaft core of the rotating spindle box is eccentric with the sleeve, reducing the cutting center distance and expanding the size of the cut single-crystalline silicon wafer to 210.

[0014] 2. An internally mounted permanent magnet synchronous motor compatible with the system, including a stator and a rotor, forms a closed-loop control with the encoder. Without changing the original system, there is no need to purchase expensive imported servo motors, greatly reducing costs.

[0015] 3. The water jacket is provided with several water jacket water channels. After the coolant enters from the coolant inlet, it circulates in a circle to cool, reducing the heat generation of the stator to achieve the effect of a cooling cycle.

[0016] 4. The motorized spindle is provided with an air seal, which cooperates with a multi-layer end face sealing structure to effectively prevent the solid-liquid mixture of silicon powder from entering the spindle interior and improve the service life.

[0017] 5. The sealing ring fits tightly with the shaft core gland and rotates and rubs to prevent impurities from entering the spindle interior. A very small number of impurities that enter the front end adhere to the front gland face. After the air storage tank is filled with compressed air, it overflows from the air gap between the inner hole of the front outer cover and the shaft core gland, taking away the impurities on the front gland face and preventing them from entering the spindle interior.

[0018] 6. Special bearing configuration enables the main shaft to have the characteristics of high rotational speed, high load-bearing capacity, and low noise relative to the original axle box.

[0019] 7. Reduces the installation difficulty and has high on-site commissioning efficiency. High integration reduces unnecessary procurement and lowers costs. High load-bearing capacity and high rotational speed meet the processing requirements and improve processing efficiency. Small space occupancy makes the entire machine clean and tidy, reducing the maintenance difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the present invention.

[0021] Figure 2 It is an axial view of the shaft core in the present invention.

[0022] Figure 3 It is a cross-sectional view of the sleeve in the present invention.

[0023] Figure 4 It is a top view of the sleeve flange in the present invention.

[0024] Figure 5 It is a schematic diagram of the installation and pairing of two motor spindles in the present invention.

[0025] In the figure, 1. Shaft core; 2. Safety pin; 3. Shaft core gland; 4. Front outer retaining cover; 5. Front gland; 6. Sleeve flange; 7. Front inner washer; 8. First bearing; 9. Second bearing; 10. Third bearing; 11. Outer spacer; 12. Inner spacer; 13. Fourth bearing; 14. Fifth bearing; 15. Rear outer washer; 16. Rear bearing washer; 17. Bearing locking nut; 18. Motor base flange; 19. Water jacket flange; 20. Water jacket; 21. Stator; 22. Rotor; 23. Rotor shaft core; 24. Rotor locking nut; 25. Rear bearing housing; 26. Rear bearing retaining ring; 27. Sixth bearing; 28. Rear adjusting washer; 29. Encoder mounting seat; 30. Encoder; 31. Encoder retaining cover; 32. Sleeve; 33. Rear cover; 34. Wave spring; 35. Sealing ring; 36. Front gland air duct; 37. Sleeve air duct; 38. Rear cover air duct; 39. Water jacket flange air duct; 40. Water jacket air duct; 41. Water jacket water channel; 42. Air inlet; 43. Air storage tank; 44. Coolant inlet; 100. Spindle mechanism; 200. Motor mechanism; 321. Sleeve inner hole; 322. Sleeve outer circle; 601. Sleeve flange inner hole; 602. Sleeve flange outer circle; A. Eccentric distance; B. Electric spindle cutting center distance; C. Electric spindle mounting hole pitch. DETAILED DESCRIPTION OF THE INVENTION

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0027] As Figures 1-5 shown, the present invention is an eccentric spindle of a machine tool with high load-bearing and high rotational speed, which is composed of a spindle mechanism 100 and a motor mechanism 200. Its characteristics are as follows: the spindle mechanism 100 includes a shaft core 1, a shaft core gland 3, a front outer retaining cover 4, a front gland 5, a sleeve flange 6, a front inner washer 7, a rear outer washer 15, a rear bearing washer 16, a bearing locking nut 17, a sleeve 32, and a sealing ring 35;

[0028] An inner spacer 12, an outer spacer 11, and a sleeve 32 are sequentially sleeved on the middle part of the shaft core 1 from inside to outside. On the front surface of the shaft core 1, a third bearing 10, a second bearing 9, a first bearing 8, a front inner washer 7, a front gland 5, and a shaft core gland 3 are sequentially sleeved in the axial direction. The inner hole of the shaft core gland 3 is matched with the shaft core 1, and the shaft core gland 3 is connected to the shaft core 1 through a safety pin 2. The outer ring of the front inner washer 7 is sleeved with a sleeve 32, and a sleeve air duct 37 is provided on the sleeve 32. The front gland 5 is connected to the sleeve 32 by screws, and the front gland 5 is concentric with the inner holes of the shaft core 1 and the sleeve 32. A front gland air duct 36 is provided on the front gland 5. The inner hole of the front outer retaining cover 4 is matched with the outer circle of the shaft core gland 3 to form a plurality of labyrinth air gaps. The front outer retaining cover 4 is matched with the front gland 5 and is fixed on the front gland 5 by screws. The sealing ring 35 is composed of a wear-resistant, high-temperature-resistant and tough material and is embedded in the front gland 5. The right end face of the sealing ring 35 is closely attached to the shaft core gland 3. A gas storage tank 43 is formed among the shaft core gland 3, the front outer retaining cover 4, the front gland 5, and the sealing ring 35. The outer ring of the front gland 5 is sleeved with a sleeve flange 6. The sleeve flange 6 is connected to the sleeve 32 by screws, and a plurality of screw counterbores are provided on the sleeve flange 6 for connecting to the machine table end face;

[0029] A fourth bearing 13, a fifth bearing 14, a rear bearing washer 16, and a bearing lock nut 17 are axially sleeved on the rear surface of the shaft core 1 in sequence. A rear outer washer 15 is sleeved on the outer ring of the rear bearing washer 16, and a rear cover 33 is sleeved on the outer ring of the bearing lock nut 17. The rear outer washer 15 is in surface contact with the fifth bearing 14. The rear cover 33 presses the rear outer washer 15 and is fixedly connected to the sleeve 32 by screws. The rear cover 33 is provided with a rear cover air passage 38. The bearing lock nut 17 is threadedly fastened to the shaft core 1 to lock the fourth bearing 13 and the fifth bearing 14 mounted on the shaft core 1. A motor base flange 18 is sleeved on the outer ring of the rear cover 33. The inner hole of the motor base flange 18 is matched with the outer circle of the rear cover 33, and the end surface is in contact with the end surface of the machine table. The motor base flange 18 is fixedly connected to the sleeve 32 by screws. The left side of the inner hole of the motor base flange 18 is matched with a water jacket flange 19, and the left side of the motor base flange 18 is fixedly connected to the water jacket flange 19 by screws. The water jacket flange 19 is provided with a water jacket flange air passage 39;

[0030] The motor mechanism 200 includes a rotor shaft core 23, a rotor 22, a stator 21, a water jacket 20, a rotor lock nut 24, an encoder mounting seat 29, an encoder 30, and an encoder cover 31. A rotor 22, a stator 21, and a water jacket 20 are sleeved on the outer surface of the middle part of the rotor shaft core 23 from inside to outside in sequence. The rotor 22 is matched with the rotor shaft core 23. The rotor lock nut 24 is fastened to the rotor shaft core 23 to press the rotor 22. The rotor shaft core 23 is threadedly connected to the shaft core 1, and several setscrews are provided on the side to ensure that the rotor shaft core 23 does not loosen during the forward and reverse rotation of the shaft core 1. A sixth bearing 27 is sleeved on the rear part of the rotor shaft core 23, and the sixth bearing 27 is installed in a rear bearing seat 25. The rear bearing seat 25 is matched with the water jacket 20;

[0031] A rear bearing retainer 26 is installed on the right end surface of the rear bearing seat 25. The rear bearing retainer 26 is fixedly fastened to the rear bearing seat 25 by screws. A sixth bearing 27 and a rear adjusting washer 28 are placed in the inner hole of the rear bearing seat 25. A wave spring 34 is provided between the sixth bearing 27 and the rear adjusting washer 28. The encoder mounting seat 29 is fixed to the left end surface of the rear bearing seat 25 to press the sixth bearing 27, so that the wave spring 34 is in a pre-compressed length state. The inner hole of the encoder 30 is sleeved on the rotor shaft core 23, and several screws are fastened to the end surface. The outer circle is fixed to the encoder mounting seat 29. The encoder cover 31 is installed on the rear bearing seat 25 by screws to protect the encoder 30.

[0032] There is a certain eccentric distance A between the shaft core 1 and the sleeve 32. The inner hole 321 of the sleeve of the sleeve 32 is eccentric with the outer circle 322 of the sleeve, and the eccentric distance is A.

[0033] On the upper part of the left end face of the rear bearing housing 25, there is a coolant inlet 44. The water jacket 20 is provided with several evenly distributed water jacket water channels 41. After the coolant enters from the coolant inlet 44, it circulates axially in a circle to cool, reducing the heat of the stator 21 installed inside the water jacket 20 and achieving a cooling cycle.

[0034] On the lower part of the left end face of the rear bearing housing 25, there is an air inlet 42. The water jacket 20 is provided with a water jacket air duct 40. Compressed air enters the inside of the main shaft from the air inlet 42, passes through the water jacket air duct 41, the water jacket flange air duct 39, the rear cover air duct 38, the sleeve air duct 37, and the front gland air duct 36, and enters the air storage tank 43.

[0035] The working principle of the present invention is as follows:

[0036] A high-load and high-speed machine tool eccentric main shaft provided by the present invention is installed in a way that two motor spindles are installed side by side, and the relative installation dimension is C. The eccentric part of the motor spindle faces inward, the eccentric dimension is A, and the cutting center distance of the main shaft is B. The dimension of B is equal to C - 2A. Due to the excessive outer diameters of the mortar box and the roller, the mortar cutting machine occupies a large space, resulting in a great waste of the machine tool space.

[0037] A high-load and high-speed machine tool eccentric main shaft provided by the present invention has a certain eccentric distance A between the shaft core 1 of the motor spindle and the sleeve 32. There is an eccentricity between the inner hole 321 of the sleeve 32 and the outer circle 322 of the sleeve, and the eccentric distance is A.

[0038] The inner hole 601 of the sleeve flange is concentric with the shaft core 1. There is an eccentricity between the inner hole 601 of the sleeve flange and the outer circle 602 of the sleeve flange, and the eccentric distance is A.

[0039] In the case of eccentricity A, the size of the single-crystalline silicon wafer cut by the eccentric slicing machine tool main shaft provided by the present invention is 2A larger than that of the concentric main shaft box.

[0040] It can be seen from this that the present invention has the following advantages:

[0041] 1. The maximum linear velocity can reach 40 m / s, the maximum rotational speed is 4500 rpm, and there is an eccentricity between the shaft core 1 of the main shaft box rotation and the sleeve 32, reducing the cutting center distance and expanding the size of the cut single-crystalline silicon wafer to 210.

[0042] 2. It is internally provided with a permanent magnet synchronous motor compatible with the system, including a stator 21 and a rotor 22, forming a closed-loop control with the encoder 30. Without changing the original system, there is no need to purchase expensive imported servo motors, greatly reducing the cost.

[0043] 3. The water jacket 20 is provided with several water jacket water channels. After the coolant enters from the coolant inlet 44, it circulates in a circle to cool, reducing the heat generation of the stator 21 and achieving the effect of a cooling cycle.

[0044] 4. The electric spindle is provided with an air seal, which cooperates with a multi-layer end face sealing structure to effectively prevent the silicon powder solid-liquid mixture from entering the spindle interior and improve the service life.

[0045] 5. The sealing ring 35 fits tightly with the shaft core gland 3 and rotates to generate friction to prevent impurities from entering the spindle interior. A very small number of impurities that enter the front end are deposited on the surface of the front gland 5. After the compressed air fills the air storage tank 43, it overflows from the air gap between the inner hole of the front outer cover 4 and the shaft core gland 3, taking away the impurities on the surface of the front gland 5 and preventing them from entering the spindle interior.

[0046] 6. With a special bearing configuration, the spindle has the characteristics of high speed, high load-bearing capacity, and low noise compared with the original axle box.

[0047] 7. The installation difficulty is reduced, and the on-site commissioning efficiency is high. With a high degree of integration, unnecessary procurement is reduced, and the cost is lowered. With a high load-bearing capacity and high speed, it meets the processing requirements and improves the processing efficiency. The space occupied is small, the whole machine is clean and tidy, and the maintenance difficulty is reduced.

[0048] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. An eccentric spindle for a machine tool with high load-bearing capacity and high rotational speed, which is composed of a spindle mechanism (100) and a motor mechanism (200). It is characterized in that: The spindle mechanism (100) includes a shaft core (1), a shaft core gland (3), a front outer retaining cover (4), a front gland (5), a sleeve flange (6), a front inner washer (7), a rear outer washer (15), a rear bearing washer (16), a bearing locking nut (17), a sleeve (32), and a sealing ring (35); An inner spacer (12), an outer spacer (11), and a sleeve (32) are sequentially sleeved on the middle part of the shaft core (1) from the inside to the outside. On the front surface of the shaft core (1), a third bearing (10), a second bearing (9), a first bearing (8), a front inner washer (7), a front gland (5), and a shaft core gland (3) are sequentially sleeved along the axis. The inner hole of the shaft core gland (3) is matched with the shaft core (1), and the shaft core gland (3) is connected to the shaft core (1) through a safety pin (2). The outer ring of the front inner washer (7) is sleeved with a sleeve (32), and a sleeve air passage (37) is provided on the sleeve (32). The front gland (5) is connected to the sleeve (32) by screws. The front gland (5) is concentric with the inner holes of the shaft core (1) and the sleeve (32). A front gland air passage (36) is provided on the front gland (5). The inner hole of the front outer retaining cover (4) is matched with the outer circle of the shaft core gland (3) to form a plurality of labyrinth air gaps. The front outer retaining cover (4) is matched with the front gland (5) and is fixed on the front gland (5) by screws. The sealing ring (35) is composed of a wear-resistant, high-temperature-resistant and ductile material and is embedded on the front gland (5). The right end face of the sealing ring (35) is closely attached to the shaft core gland (3). A gas storage tank (43) is formed among the shaft core gland (3), the front outer retaining cover (4), the front gland (5), and the sealing ring (35). The outer ring of the front gland (5) is sleeved with a sleeve flange (6). The sleeve flange (6) is connected to the sleeve (32) by screws. A plurality of screw counterbores are provided on the sleeve flange (6) for connecting to the machine table end face; On the rear surface of the shaft core (1), a fourth bearing (13), a fifth bearing (14), a rear bearing washer (16), and a bearing lock nut (17) are axially sleeved in sequence. An outer rear washer (15) is sleeved on the outer ring of the rear bearing washer (16). A rear cover (33) is sleeved on the outer ring of the bearing lock nut (17). The outer rear washer (15) is in surface contact with the fifth bearing (14). The rear cover (33) presses the outer rear washer (15) and is fixedly connected to the sleeve (32) by screws. A rear cover air passage (38) is provided on the rear cover (33). The bearing lock nut (17) is threadedly fastened to the shaft core (1) to lock the fourth bearing (13) and the fifth bearing (14) mounted on the shaft core (1). An outer ring of the rear cover (33) is sleeved with a motor base flange (18). The inner hole of the motor base flange (18) fits with the outer circle of the rear cover (33), and the end face is in contact with the end face of the machine table. The motor base flange (18) is fixedly connected to the sleeve (32) by screws. The left side of the inner hole of the motor base flange (18) fits with the water jacket flange (19). The left side of the motor base flange (18) is fixedly connected to the water jacket flange (19) by screws. A water jacket flange air passage (39) is provided in the water jacket flange (19); The motor mechanism (200) includes a rotor shaft core (23), a rotor (22), a stator (21), a water jacket (20), a rotor lock nut (24), an encoder mounting seat (29), an encoder (30), and an encoder cover (31). On the outer surface of the middle part of the rotor shaft core (23), a rotor (22), a stator (21), and a water jacket (20) are sleeved from the inside to the outside in sequence. The rotor (22) fits with the rotor shaft core (23). The rotor lock nut (24) is fastened to the rotor shaft core (23) to press the rotor (22). The rotor shaft core (23) is threadedly connected to the shaft core (1), and several setscrews are provided on the side to ensure that the rotor shaft core (23) does not loosen during the forward and reverse rotation of the shaft core (1). A sixth bearing (27) is sleeved on the rear part of the rotor shaft core (23). The sixth bearing (27) is installed in the rear bearing seat (25). The rear bearing seat (25) fits with the water jacket (20); A rear bearing retaining ring (26) is installed on the right end face of the rear bearing seat (25). The rear bearing retaining ring (26) is fixedly fastened to the rear bearing seat (25) by screws. A sixth bearing (27) and a rear adjusting washer (28) are placed in the inner hole of the rear bearing seat (25). A wave spring (34) is provided between the sixth bearing (27) and the rear adjusting washer (28). The encoder mounting seat (29) is fixed on the left end face of the rear bearing seat (25) to press the sixth bearing (27) so that the wave spring (34) is in a preloaded length state. The inner hole of the encoder (30) is sleeved on the rotor shaft core (23), and several screws are fastened to the end face. The outer circle is fixed on the encoder mounting seat (29). The encoder cover (31) is installed on the rear bearing seat (25) by screws to protect the encoder (30).

2. A high-load and high-speed machine tool eccentric spindle according to claim 1, characterized in that: There is a certain eccentric distance A between the spindle core (1) and the sleeve (32). The inner hole (321) of the sleeve of the sleeve (32) is eccentric to the outer circle (322) of the sleeve, and the eccentric distance is A.

3. A high-load and high-speed machine tool eccentric spindle according to claim 1, characterized in that: A coolant inlet (44) is provided at the upper part of the left end surface of the rear bearing seat (25). The water jacket (20) is provided with a number of uniformly distributed water jacket water channels (41). After the coolant enters from the coolant inlet (44), it circulates axially in a circular motion to cool down the heat of the stator (21) installed inside the water jacket (20), achieving a cooling cycle.

4. A high-load and high-speed machine tool eccentric spindle according to claim 1, characterized in that: An air inlet (42) is provided at the lower part of the left end surface of the rear bearing seat (25). The water jacket (20) is provided with a water jacket air duct (40). Compressed air enters the inside of the spindle from the air inlet (42), passes through the water jacket air duct (41), the water jacket flange air duct (39), the rear cover air duct (38), the sleeve air duct (37), and the front gland air duct (36), and enters the air storage tank (43).

Images