CN114770148B

CN114770148B - Auxiliary driving device of spindle motor

Info

Publication number: CN114770148B
Application number: CN202210694717.5A
Authority: CN
Inventors: 高昱; 王建南; 黄丽萍; 王璐颖; 曹洲; 陆寒峰; 关正; 张平山
Original assignee: Changzhou Changlong Motor Co ltd
Current assignee: Changzhou Changlong Motor Co ltd
Priority date: 2022-06-20
Filing date: 2022-06-20
Publication date: 2022-09-06
Anticipated expiration: 2042-06-20
Also published as: CN114770148A

Abstract

The invention discloses an auxiliary driving device of a spindle motor, which comprises a mounting disc and a spindle box body, wherein an encoder is arranged outside the spindle box body, a junction box is arranged on one side of the encoder, bearing groups are arranged on two sides of the spindle box body, a spindle is sleeved inside the bearing groups, a spindle motor is arranged at the outer end of the spindle, a heat dissipation mechanism is arranged on one side of the spindle motor, a lubricating mechanism is arranged at the bottom end of the mounting disc and comprises an oil can, a gear pump is arranged at the opening end of the oil can, a high-pressure hose is arranged at the output end of the gear pump, an electromagnetic valve and a shunt joint are arranged on the high-pressure hose, and the shunt joint is connected with the bearing groups through the high-pressure hose. According to the invention, the lubricating oil in the oil can is injected into the bearing group, so that the joint of the main shaft and the bearing is fully lubricated, the friction between the main shaft and the bearing is reduced, and the joint of the main shaft and the bearing cannot be deformed due to overheating in the high-speed rotation process of the main shaft motor.

Description

Auxiliary driving device of spindle motor

Technical Field

The invention relates to the field of spindle motors, in particular to an auxiliary driving device of a spindle motor.

Background

The principle of the spindle motor is to convert electric energy into mechanical energy. High-speed numerical control (CNC) is one of the technological base and the development direction of the equipment manufacturing industry, and is a strategic industry of the equipment manufacturing industry. The working performance of a high-speed numerically controlled machine tool depends, in the first place, on the performance of the high-speed spindle. The high-speed electric spindle unit of the numerical control machine tool influences the precision, stability and application range of a machining system, and the dynamic performance and stability of the high-speed electric spindle unit play a key role in high-speed machining. The high-speed spindle unit is mainly of the type of an electric spindle, a pneumatic spindle, a hydrodynamic spindle, and the like. The output power of different types of high-speed spindle units is greatly different. Generally, a tool or a workpiece is mounted on a spindle head, connected through a pulley or a gear, and driven by a motor. The motor has more parts and limited precision, and the motor rotor is made into a hollow structure, so that a space is reserved for installing a cutter or a workpiece, and the electric spindle motor is formed.

In order to improve the production efficiency and reduce the cost, the rotation speed of the inner spindle needs to be faster. However, the over-fast rotation of the spindle causes problems such as long acceleration/deceleration time, loud noise, over-fast temperature rise, and difficulty in maintenance.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides an auxiliary driving device of a spindle motor.

In order to solve the technical problems, the invention provides the following technical scheme:

the invention discloses an auxiliary driving device of a spindle motor, which comprises a mounting disc and a spindle box body, wherein a coder is arranged outside the spindle box body, a junction box is arranged on one side of the coder, bearing groups are arranged on two sides of the spindle box body, a spindle is sleeved inside the bearing groups, a spindle motor is arranged at the outer end of the spindle, a heat dissipation mechanism is arranged on one side of the spindle motor, a lubricating mechanism is arranged at the bottom end of the mounting disc and comprises an oil can, a gear pump is arranged at the opening end of the oil can, a high-pressure hose is arranged at the output end of the gear pump, a solenoid valve and a shunt joint are arranged on the high-pressure hose, and the shunt joint is connected with the bearing groups through the high-pressure hose.

As a preferable technical solution of the present invention, the bearing assembly includes an angular contact bearing, a deep groove ball bearing, and a first graphite oil seal, a spacer ring is disposed between the angular contact bearing and the deep groove ball bearing, an oil hole is formed in a center of a bottom end of the spacer ring, the first graphite oil seal is disposed on outer sides of the angular contact bearing and the deep groove ball bearing, and a high-pressure hose connected by the tap joint penetrates through an inner portion of the main spindle box and is connected to the oil hole.

As a preferable technical scheme of the invention, the spacing ring is fixedly connected with the outer rings of the angular contact bearing and the deep groove ball bearing, and a gap is reserved between the spacing ring and the main shaft.

As a preferred technical scheme of the present invention, an interference sleeve is disposed between a rotor and a spindle of the spindle motor, balance discs are disposed on both sides of the rotor of the spindle motor, the heat dissipation mechanism includes a cooling sleeve attached to an outer side surface of a stator of the spindle motor, a circulation pipe is disposed on a surface of the cooling sleeve, a refrigeration assembly is disposed on one side of the lubrication mechanism, the refrigeration assembly includes a terminal connector and an external circulation water cooler, the circulation pipe extends to the outside of a spindle case to be connected with the terminal connector, and the terminal connector is connected with the external circulation water cooler.

As a preferred technical scheme of the invention, a shaft sleeve is installed at the rear end of an inner cavity of the main shaft box body, a first ceramic ball bearing is embedded at one end of the shaft sleeve, a second ceramic ball bearing is embedded at the other end of the shaft sleeve, second graphite oil seals are respectively arranged on the outer sides of the first ceramic ball bearing and the second ceramic ball bearing, a check ring is arranged on the outer side of each second graphite oil seal, a hollow rod is sleeved inside the second ceramic ball bearing close to the rear end, one end of the hollow rod abuts against the main shaft, an impeller is sleeved at the outer end of the abutting position, an oil nozzle is installed at the bottom end of the shaft sleeve, an electromagnetic valve is arranged on the oil nozzle, the oil nozzle is communicated with a hose, and the hose penetrates through the outer part of the main shaft box body and is connected with a hydraulic oil pump.

As a preferable technical scheme of the invention, a plurality of spoilers are arranged in the inner cavity of the hollow rod at intervals in a staggered manner, a plurality of through holes are formed in the periphery of the axis of the impeller, and inlet and outlet holes opposite to the through holes are formed in the periphery of the hollow rod.

As a preferable technical scheme of the invention, the shaft sleeve is fixedly arranged on the inner wall of the main shaft box body, and the periphery of the connecting part is provided with a rubber sealing ring.

According to a preferable technical scheme, the left side and the right side of the bottom end of the mounting disc are respectively provided with a connecting support column, the surface of the mounting disc is provided with a wiring hole, the long edge of the top end of the mounting disc is provided with a protective side plate, the surface of the protective side plate is provided with a transverse notch, a transverse strip is embedded in the transverse notch in a sliding and clamping manner, the inner side of the transverse strip is connected with a U-shaped clamping piece, the bottom end mounting pin of the spindle box body is embedded in the U-shaped clamping piece in a clamping manner, and the top end surface of the U-shaped clamping piece is provided with a locking nut.

According to a preferable technical scheme of the invention, one side of the transverse notch penetrates through the protective side plate, the outer side of the transverse strip is connected with a plurality of screw rods, the periphery of each screw rod is sleeved with a nut sleeve, protective insections are arranged on the inner side of each nut sleeve and the outer side of each protective side plate, and sound-absorbing cotton is arranged on the top end surface of the mounting disc.

Compared with the prior art, the invention has the following beneficial effects:

according to the invention, the lubricating oil in the oil can is injected into the bearing group, so that the joint of the main shaft and the bearing is fully lubricated, the friction between the main shaft and the bearing is reduced, and the joint of the main shaft and the bearing cannot be deformed due to overheating in the high-speed rotation process of the main shaft motor; through the angular contact bearing, the deep groove ball bearing and the spacing ring, a closed space is formed by matching with the first graphite oil seal on the outer side, so that partial heat is taken away by compressing the space pressure of the contact part of the main shaft and the bearing, meanwhile, the oil quantity of lubricating oil can be accurately controlled, and the lubricating effect is improved; the end of the main shaft is connected with the impeller, so that after hydraulic oil is input from the oil nozzle, the internal air pressure is improved, and the temperature of the main shaft is reduced; meanwhile, the periphery of the impeller and the interior of the hollow rod are filled with hydraulic oil, so that the main shaft has resistance when driving the impeller at the tail end part to rotate, and can play a role in assisting in stopping rotation; meanwhile, after the hydraulic oil in the shaft sleeve is pumped out to form negative pressure in the shaft sleeve, the noise transmission can be blocked, and the impeller is also beneficial to keeping the stability in the rotating process of the main shaft; the installation foot through U-shaped joint spare and main shaft box is connected, later in inserting the protection curb plate through the horizontal pole, after locking the nut cover in the outside again, can accomplish the installation to the main shaft box, and follow-up needs when dismantling the maintenance to tool bit or spindle motor, can outwards release main shaft box, convenient operation.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a sectional view of the spindle head structure of the present invention;

FIG. 3 is a schematic view of the lubrication mechanism of the present invention;

FIG. 4 is a schematic view of the bearing set construction of the present invention;

FIG. 5 is a cross-sectional view of a spacer ring of the present invention;

FIG. 6 is a schematic structural diagram of a heat dissipation mechanism according to the present invention;

FIG. 7 is a sectional view of the inner structure of the shaft sleeve of the present invention;

FIG. 8 is a schematic longitudinal cross-section of an impeller and hollow shaft of the present invention;

FIG. 9 is a transverse cross-sectional schematic view of a hollow bar of the present invention;

FIG. 10 is a schematic view of a mounting plate portion configuration of the present invention;

FIG. 11 is a schematic view of the protective side panel structure of the present invention;

in the figure: 1. mounting a disc; 2. a main shaft box body; 3. an encoder; 4. a junction box; 5. a bearing set; 6. a main shaft; 7. a spindle motor; 8. a heat dissipation mechanism; 9. a lubrication mechanism; 11. connecting the supporting columns; 12. a wiring hole; 13. a protective side plate; 14. a transverse notch; 15. a horizontal bar; 16. a U-shaped clamping piece; 17. a nut sleeve; 19. a screw; 91. an oil can; 92. a gear pump; 93. a high pressure hose; 94. an electromagnetic valve; 95. a tap joint; 51. an angular contact bearing; 52. a deep groove ball bearing; 53. a first graphite oil seal; 54. a spacing ring; 55. an oil hole; 81. a cooling jacket; 82. a circulation pipe; 83. a terminal fitting; 101. an impeller; 102. a nozzle tip; 104. a shaft sleeve; 105. a first ceramic ball bearing; 106. a second ceramic ball bearing; 107. a second graphite oil seal; 108. a retainer ring; 109. a hollow shaft; 1010. a spoiler; 1011. a through hole; 1012. and (4) entering and exiting the hole.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.

Example 1

As shown in fig. 1-3, the present invention provides an auxiliary driving device for a spindle motor, including a mounting disc 1 and a spindle box 2, an encoder 3 is disposed outside the spindle box 2, a junction box 4 is disposed on one side of the encoder 3, bearing sets 5 are disposed on both sides of the spindle box 2, a spindle 6 is sleeved inside the bearing sets 5, a spindle motor 7 is disposed at an outer end of the spindle 6, a heat dissipation mechanism 8 is disposed on one side of the spindle motor 7, a lubrication mechanism 9 is disposed at a bottom end of the mounting disc 1, the lubrication mechanism 9 includes an oil can 91, a gear pump 92 is disposed at an open end of the oil can 91, a high-pressure hose 93 is disposed at an output end of the gear pump 92, a solenoid valve 94 and a tap 95 are disposed on the high-pressure hose 93, and the tap 95 is connected to the bearing sets 5 through the high-pressure hose 93.

Specifically, the spindle box 2 is fixedly mounted on the mounting disc 1, the encoder 3 and the junction box 4 are connected with the spindle motor 7 inside, the lubricating oil inside the oil can 91 is output outwards through the gear pump 92, the oil way is controlled through the electromagnetic valve 94, the output lubricating oil enters the bearing set 5 inside the spindle box 2 through the shunt joint 95 and the high-pressure hose 93, the maximum rotating speed of the electric spindle can reach 20000r/min, the torque range is 0.02-300 Nm, in the process of high-speed rotation, the lubricating oil at the joint of the spindle 6 and the bearing set 5 can accelerate the evaporation of the lubricating oil and dry-grind the lubricating oil, so that the temperature is increased to cause the deformation of the spindle 6 and the bearing set 5, at the moment, the lubricating oil is input into the bearing set 5 sleeved at the outer end of the spindle 6 in a forced direction, the friction of the lubricating oil can be reduced, and the heat productivity is reduced.

Example 2

As shown in fig. 4-5, the present invention provides an auxiliary driving device for a spindle motor, wherein a bearing assembly 5 includes an angular contact bearing 51, a deep groove ball bearing 52 and a first graphite oil seal 53, a spacer ring 54 is disposed between the angular contact bearing 51 and the deep groove ball bearing 52, an oil hole 55 is formed at the bottom center of the spacer ring 54, the first graphite oil seal 53 is disposed at the outer sides of the angular contact bearing 51 and the deep groove ball bearing 52, and a high pressure hose 93 connected to a tap 95 penetrates through the main spindle housing 2 and is connected to the oil hole 55.

Further, the spacing ring 54 is fixedly connected with the outer rings of the angular contact bearing 51 and the deep groove ball bearing 52, and a gap is reserved between the spacing ring 54 and the main shaft 6.

Specifically, in embodiment 1, the angular contact bearing 51 and the deep groove ball bearing 52 are used to bear both the radial load and the large unidirectional axial load, and the rigidity is high, the high-speed performance is good, the structure is simple and compact, the maintenance and the replacement are convenient, the clearance between the spacing ring 54 and the main shaft 6 is isolated by the angular contact bearing 51 and the deep groove ball bearing 52, meanwhile, the first graphite oil seal 53 on the outer side ensures the stable pressure of the separated space, and simultaneously avoids the leakage of the lubricating oil, further, the lubricating oil outputted from the high-pressure hose 93 can flow out of the oil hole 55 and then flow to the main shaft 6, the angular contact bearing 51 and the deep groove ball bearing 52, so that the bearing parts are sufficiently lubricated, meanwhile, in order to further control the oil quantity, the gear pump 92 can rotate to pump out the lubricating oil in the gap, and then realize the accurate control to lubricating oil, effectively promote lubricated effect, avoid lubricating oil too much or too little.

Example 3

As shown in fig. 6, the present invention provides an auxiliary driving device for a spindle motor, an interference sleeve is disposed between a rotor of a spindle motor 7 and a spindle 6, balance discs are disposed on both sides of the rotor of the spindle motor 7, a heat dissipation mechanism 8 includes a cooling jacket 81, the cooling jacket 81 is attached to the outer side surface of a stator of the spindle motor 7, a circulation pipe 82 is disposed on the surface of the cooling jacket 81, a refrigeration component is disposed on one side of a lubrication mechanism 9, the refrigeration component includes a terminal connector 83 and an external circulation water cooler, the circulation pipe 82 extends to the outside of a spindle case 2 to be connected with the terminal connector 83, and the terminal connector 83 is connected with the external circulation water cooler.

Specifically, on the basis of embodiment 1, in the working process of the spindle motor 7, a large amount of heat is generated by friction between the rotor and the stator during high-speed rotation, at this time, the heat is absorbed by the cooling jacket 81 wrapped on the outer side of the stator, and then the heat is absorbed by the circulating pipeline 82, and at this time, the condensed water with the heat absorbed by the circulating pipeline 82 is cooled by the external circulating water cooler, so that the stator is cooled; meanwhile, the external circulation water cooler can be replaced by a nitrogen cooler, the terminal connector 83 is connected with the nitrogen cooler, and the corresponding air valve is assembled, so that the same cooling effect can be achieved.

Example 4

As shown in fig. 7-9, the present invention provides an auxiliary driving device for a spindle motor, wherein a shaft sleeve 104 is installed at the rear end of an inner cavity of a main spindle box 2, a first ceramic ball bearing 105 is embedded at one end of the shaft sleeve 104, a second ceramic ball bearing 106 is embedded at the other end of the shaft sleeve 104, second graphite oil seals 107 are respectively installed at the outer sides of the first ceramic ball bearing 105 and the second ceramic ball bearing 106, a retainer ring 108 is installed at the outer side of the second graphite oil seal 107, a hollow rod 109 is sleeved inside the second ceramic ball bearing 106 close to the rear end, one end of the hollow rod 109 abuts against a spindle 6, an impeller 101 is sleeved at the outer end of the abutting position, an oil nipple 102 is installed at the bottom end of the shaft sleeve 104, an electromagnetic valve is installed on the oil nipple 102, the oil nipple 102 is communicated with a hose, and the hose penetrates through the outer portion of the main spindle box 2 to be connected with a hydraulic oil pump.

Furthermore, a plurality of spoilers 1010 are arranged in the inner cavity of the hollow rod 109 at intervals in a staggered manner, a plurality of through holes 1011 are formed in the periphery of the axis of the impeller 101, and an inlet and outlet hole 1012 opposite to the through holes 1011 is formed in the periphery of the hollow rod 109.

Further, the shaft sleeve 104 is fixedly mounted on the inner wall of the main shaft box 2, and a rubber seal ring is arranged on the periphery of the joint.

Specifically, on the basis of embodiment 1, the second graphite oil seal 107 and the check ring 108 on both sides ensure the pressure in the shaft sleeve 104; when the main shaft 6 rotates, the hollow rod 109 is driven to rotate along with the main shaft, when the main shaft 6 needs to be stopped to rotate, an external hydraulic oil pump injects hydraulic oil into the oil nozzle 102, the hydraulic oil enters the inside of the shaft sleeve 104 and is positioned at the peripheral part of the impeller 101, the hydraulic oil enters the inside of the hollow rod 109 from a through hole 1011 at the periphery of the axis of the impeller 101, at this time, the air inside the shaft sleeve 104 is compressed, the boiling point of the hydraulic oil is increased after the air pressure rises, evaporation is avoided, and the influence on the main shaft 6 due to overhigh temperature is avoided, at this time, the impeller 101 can generate resistance in rotation due to the fact that the inside of the shaft sleeve 104 is filled with the hydraulic oil and has a certain high pressure value, and meanwhile, a spoiler inside of the hollow rod 109 can also generate partial resistance to assist the main shaft 6 to stop rotating; after the spindle motor stops rotating, hydraulic oil flows back into the hydraulic oil pump from the oil nozzle 102, meanwhile, air in the shaft sleeve 104 is partially pumped out and forms negative pressure, and then when the spindle motor is driven to rotate, the impeller 101 at the tail end can play an auxiliary role, the swing of the spindle 6 is reduced, the overall vibration is reduced, and meanwhile, the propagation of noise is reduced due to the vacuum environment.

Example 5

As shown in fig. 10-11, the invention provides an auxiliary driving device for a spindle motor, wherein connecting pillars 11 are respectively installed on the left side and the right side of the bottom end of a mounting disc 1, wiring holes 12 are formed on the surface of the mounting disc 1, protective side plates 13 are respectively arranged on the long edge of the top end of the mounting disc 1, transverse notches 14 are formed on the surfaces of the protective side plates 13, transverse bars 15 are slidably inserted into the transverse notches 14, U-shaped clamping pieces 16 are connected to the inner sides of the transverse bars 15, mounting pins at the bottom end of a spindle case 2 are clamped into the U-shaped clamping pieces 16, and locking nuts are arranged on the top end surfaces of the U-shaped clamping pieces 16.

Further, one side of the transverse notch 14 penetrates through the protective side plate 13, the outer side of the transverse strip 15 is connected with a plurality of screw rods 19, the periphery of each screw rod 19 is sleeved with a nut sleeve 17, protective insections are arranged on the inner side of each nut sleeve 17 and the outer side of the corresponding protective side plate 13, and the top end surface of the mounting disc 1 is provided with sound absorption cotton.

Specifically, on the basis of embodiment 1, after the mounting leg of the main spindle box body 2 is embedded in the U-shaped clamping piece 16, the mounting leg is fixedly connected with the U-shaped clamping piece 16 through a locking nut, then the cross bar 15 on the outer side of the U-shaped clamping piece 16 slides into the transverse notch 14, then a nut sleeve 17 on the periphery of a screw 19 on the cross bar 15 is locked, so that the inner side of the nut sleeve is tightly abutted against the outer side of the protective side plate 13, thereby completing stable assembly of the main spindle box body 2, the wiring hole 12 is used for being connected with a circuit in the main spindle box body 2, and finally the connecting strut 11 is mounted on equipment and can be used; when the tool bit of needs spindle motor front end is changed, then loosen nut cover 17 slightly, make horizontal bar 15 can carry out the roll-off to the outside of horizontal notch 14, and then conveniently dismantle the change to the tool bit to and to spindle motor's maintenance or change, inhale the noise that the sound cotton then can absorb the part, also avoid the greasy dirt to fall to mounting disc 1, convenient clearance simultaneously.

According to the invention, the lubricating oil in the oil can is injected into the bearing group, so that the joint of the main shaft and the bearing is fully lubricated, the friction between the main shaft and the bearing is reduced, and the joint of the main shaft and the bearing cannot be deformed due to overheating in the high-speed rotation process of the main shaft motor; through the angular contact bearing, the deep groove ball bearing and the spacing ring, a closed space is formed by matching with the first graphite oil seal on the outer side, so that partial heat is taken away by compressing the space pressure of the contact part of the main shaft and the bearing, meanwhile, the oil quantity of lubricating oil can be accurately controlled, and the lubricating effect is improved; the end of the main shaft is connected with the impeller, so that after hydraulic oil is input from the oil nozzle, the internal air pressure is improved, and the temperature of the main shaft is reduced; meanwhile, the periphery of the impeller and the interior of the hollow rod are filled with hydraulic oil, so that the main shaft has resistance when driving the impeller at the tail end part to rotate, and can play a role in assisting in stopping rotation; meanwhile, after the hydraulic oil in the shaft sleeve is pumped out to form negative pressure inside, the noise transmission can be blocked, and the impeller is also beneficial to keeping stable in the rotation process of the main shaft; the installation foot through U-shaped joint spare and main shaft box is connected, later in inserting the protection curb plate through the horizontal pole, after locking the nut cover in the outside again, can accomplish the installation to the main shaft box, and follow-up needs when dismantling the maintenance to tool bit or spindle motor, can outwards release main shaft box, convenient operation.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An auxiliary driving device of a spindle motor comprises a mounting disc (1) and a spindle box body (2), wherein an encoder (3) is arranged outside the spindle box body (2), a junction box (4) is arranged on one side of the encoder (3), and the auxiliary driving device is characterized in that bearing sets (5) are arranged on two sides of the spindle box body (2), a spindle (6) is sleeved inside the bearing sets (5), a spindle motor (7) is arranged at the outer end of the spindle (6), a heat dissipation mechanism (8) is arranged on one side of the spindle motor (7), a lubricating mechanism (9) is arranged at the bottom end of the mounting disc (1), the lubricating mechanism (9) comprises an oil can (91), a gear pump (92) is arranged at the opening end of the oil can (91), a high-pressure hose (93) is arranged at the output end of the gear pump (92), a solenoid valve (94) and a shunt joint (95) are arranged on the high-pressure hose (93), the shunt joint (95) is connected with the bearing set (5) through a high-pressure hose (93);

a shaft sleeve (104) is arranged at the rear end of the inner cavity of the main shaft box body (2), a first ceramic ball bearing (105) is embedded at one end of the shaft sleeve (104), a second ceramic ball bearing (106) is embedded at the other end of the shaft sleeve (104), a second graphite oil seal (107) is arranged at the outer sides of the first ceramic ball bearing (105) and the second ceramic ball bearing (106), a retainer ring (108) is arranged on the outer side of the second graphite oil seal (107), a hollow rod (109) is sleeved inside the second ceramic ball bearing (106) close to the rear end, one end of the hollow rod (109) is abutted against the main shaft (6), the outer end of the abutting part is sleeved with an impeller (101), the bottom end of the shaft sleeve (104) is provided with a nozzle tip (102), an electromagnetic valve is arranged on the oil nozzle (102), the oil nozzle (102) is communicated with a hose, and the hose penetrates through the outside of the spindle box body (2) to be connected with a hydraulic oil pump;

a plurality of flow baffles (1010) are arranged in the inner cavity of the hollow rod (109) at intervals in a staggered mode, a plurality of through holes (1011) are formed in the periphery of the axis of the impeller (101), and an inlet and outlet hole (1012) opposite to the through holes (1011) is formed in the periphery of the hollow rod (109);

the shaft sleeve (104) is fixedly arranged on the inner wall of the main shaft box body (2), and a rubber sealing ring is arranged on the periphery of the joint.

2. The auxiliary driving device of a spindle motor according to claim 1, wherein the bearing assembly (5) comprises an angular contact bearing (51), a deep groove ball bearing (52) and a first graphite oil seal (53), a spacing ring (54) is arranged between the angular contact bearing (51) and the deep groove ball bearing (52), an oil hole (55) is formed in the center of the bottom end of the spacing ring (54), the first graphite oil seal (53) is arranged on the outer sides of the angular contact bearing (51) and the deep groove ball bearing (52), and a high-pressure hose (93) connected by the split joint (95) penetrates through the spindle box (2) and is connected with the oil hole (55).

3. The auxiliary driving apparatus of a spindle motor according to claim 2, wherein the spacer ring (54) is fixedly connected with the outer rings of the angular contact bearing (51) and the deep groove ball bearing (52), and a gap is left between the spacer ring (54) and the spindle (6).

4. The auxiliary driving device of the spindle motor according to claim 1, wherein an interference sleeve is arranged between the rotor of the spindle motor (7) and the spindle (6), balance discs are arranged on both sides of the rotor of the spindle motor (7), the heat dissipation mechanism (8) comprises a cooling sleeve (81), the cooling sleeve (81) is attached to the outer side surface of the stator of the spindle motor (7), a circulation pipeline (82) is arranged on the surface of the cooling sleeve (81), a refrigeration component is arranged on one side of the lubrication mechanism (9), the refrigeration component comprises a terminal joint (83) and an external circulation water cooler, the circulation pipeline (82) penetrates through the outside of the spindle box body (2) and is connected with the terminal joint (83), and the terminal joint (83) is connected with the external circulation water cooler.

5. The auxiliary driving device of a spindle motor according to claim 1, wherein connecting pillars (11) are installed on the left and right sides of the bottom end of the mounting disk (1), the surface of the mounting disk (1) is provided with wiring holes (12), the top long edge of the mounting disk (1) is provided with a protective side plate (13), the surface of the protective side plate (13) is provided with a transverse notch (14), a transverse bar (15) is embedded in the transverse notch (14) in a sliding manner, the inner side of the transverse bar (15) is connected with a U-shaped clamping member (16), the bottom end mounting foot of the spindle box body (2) is clamped in the U-shaped clamping member (16), and the top surface of the U-shaped clamping member (16) is provided with a locking nut.

6. The auxiliary driving device of a spindle motor according to claim 5, wherein one side of the transverse notch (14) penetrates through a protective side plate (13), the outer side of the transverse bar (15) is connected with a plurality of screws (19), a nut sleeve (17) is sleeved on the periphery of each screw (19), protective insections are arranged on the inner side of each nut sleeve (17) and the outer side of each protective side plate (13), and sound absorbing cotton is arranged on the top end surface of the mounting plate (1).