CN112122630B - Main shaft seal structure and tool turret - Google Patents

Abstract

The invention discloses a main shaft sealing structure and a tool turret, which comprise a mounting hole for a main shaft to be inserted into and rotatably matched, and further comprise a mounting seat arranged on the mounting hole, wherein the mounting seat is provided with a first through hole, the main shaft is provided with a lower end part extending into the first through hole, a first gap is formed between the first through hole and the outer side surface of the lower end part, the side wall of the first through hole is provided with an annular sealing groove, and a sealing element is embedded in the annular sealing groove. Compared with the prior art, the sealing structure can avoid the abrasion of the sealing element, and simultaneously has double sealing structures to enhance the sealing effect. In addition, the cutter tower can enable the cutter head to have a better sealing effect, avoid equipment damage and improve the working efficiency.

Description

Main shaft seal structure and tool turret

Technical Field

The invention relates to the technical field of turrets, in particular to a spindle sealing structure and a turret.

Background

The turret is a core functional component of a numerical control machining center, and is mainly used for mounting a cutter to realize functions of turning, milling and the like. The main structure of the turret comprises a main box body, a bearing seat fixed on the main box body and a cutter head sleeved at the end part of the bearing seat, wherein a plurality of matched main shafts are arranged on the cutter head. The environment of the main shaft during working is severe, and impurities such as cutting fluid, chips, dust and the like easily enter the cutter head to influence the work of the cutter head and the main shaft. In the prior art, a common rubber ferrule or an oil seal is used for sealing at a rotating matching position of a main shaft, but the main shaft rotates at a high speed during working and the rubber ferrule is easy to rub to cause abrasion, so that the sealing effect is influenced.

In view of the above, the applicant has made an intensive study to solve the above problems and has made the present invention.

Disclosure of Invention

The invention mainly aims to provide a main shaft sealing structure which can avoid abrasion of a sealing element, and has a double sealing structure to enhance the sealing effect.

The invention also aims to provide the cutter tower, so that the cutter head has a better sealing effect, equipment damage is avoided, and the working efficiency is improved.

In order to achieve the above purpose, the solution of the invention is:

the utility model provides a main shaft seal structure, includes that the confession main shaft inserts normal running fit's mounting hole, wherein, still includes the mount pad of establishing on the mounting hole, the mount pad is equipped with first through-hole, the main shaft has and stretches into the lower tip of first through-hole, first clearance has between the lateral surface of first through-hole and lower tip, the annular seal groove has been seted up on the lateral wall of first through-hole, the embedded sealing member that is equipped with of annular seal groove.

Further, the sealing element comprises a first side wall abutting against the side wall of the annular sealing groove, a second side wall abutting against the side wall of the main shaft, and an upper wall connecting the upper end of the first side wall and the upper end of the second side wall, wherein a plugging groove is formed among the first side wall, the second side wall and the upper wall; the second side wall is provided with a connecting part vertically connected with the upper wall and an abutting part inclining towards the side wall of the main shaft and abutting against the side wall of the main shaft.

Furthermore, the abutting part is provided with a first inclined plane arranged on the outer side of the second side wall and a second inclined plane arranged on the inner side of the second side wall, and the first inclined plane and the second inclined plane are inclined towards the direction of the lower end part gradually from top to bottom.

Furthermore, the lower surface of the mounting seat is further provided with a fixed convex ring protruding downwards, the outer circumferential surface of the lower end part is provided with an annular boss protruding outwards, the upper surface of the annular boss is provided with an annular accommodating groove for the fixed convex ring to extend into, and a second gap is formed between the bottom wall and the side groove wall of the annular accommodating groove and the fixed convex ring.

Furthermore, an annular groove is further formed in the outer side wall of the fixed convex ring.

Furthermore, the annular groove is provided with a lower groove wall and an inclined groove wall which are connected, and the inclined groove wall is gradually inclined towards the outer side wall of the fixed convex ring from bottom to top.

Furthermore, an annular fixing plate is further arranged above the lower end portion, a third gap is formed between the outer circumferential side face of the annular fixing plate and the mounting seat, and a fourth gap is formed between the lower surface of the annular fixing plate and the mounting seat.

Furthermore, the upper surface of the mounting seat is provided with a positioning convex ring protruding upwards, and the positioning convex ring is embedded with the mounting hole.

Further, the sealing element is made of rubber materials.

The invention also provides a turret based on the main shaft sealing structure, which further comprises a cutter disc, a main box body, a bearing seat and an air blowing device, wherein the mounting holes are formed in the cutter disc, the bearing seat is connected with the main box body, a driving shaft is arranged in the bearing seat, a second through hole for driving the bearing seat to extend out is formed in the bearing seat, a third through hole for the bearing seat to insert is formed in the middle of the cutter disc, the third through hole is communicated with the mounting holes, the main box body is provided with a first air blowing hole, the bearing seat is provided with a second air blowing hole, the second air blowing hole is communicated with the first air blowing hole and the second through hole, and the air outlet end of the air blowing device is communicated with the first air blowing hole.

The cutter head driving device further comprises a first gear, a second gear, a third gear and a first motor, the first motor is connected to the main box body, the first gear is connected with the main box body, the second gear is sleeved on the outer side of the first gear, the third gear is arranged on the side edges of the first gear and the second gear, and the third gear is connected with the cutter head; the end faces of the first gear and the second gear, which are close to the third gear, are respectively provided with a first end face tooth and a second end face tooth, the third gear is provided with a third end face tooth meshed with the first end face tooth and the second end face tooth, the third gear is close to or far away from the first gear and the second gear through hydraulic driving, and the first motor drives the second gear to rotate.

Furthermore, the bearing block further comprises an oil cylinder shaft, the oil cylinder shaft is used for connecting the bearing block and the main box body, and the first gear and the third gear are sleeved on the oil cylinder shaft; the terminal surface that the third gear is close to blade disc one side is equipped with outside bellied annular arch, the outer circumference of hydro-cylinder axle has outside bellied cylinder boss, the lateral surface and the bellied inside wall laminating of annular of cylinder boss, form first hydraulic pressure chamber between annular arch and the hydro-cylinder axle, form the second hydraulic pressure chamber between third gear and second gear and the first gear.

Further, still include main shaft drive, main shaft drive includes the second motor, motor shaft, drive mechanism, the second motor is connected with the motor shaft, be connected through drive mechanism transmission between motor shaft and the drive shaft.

Further, the lower extreme of drive shaft has the mounting groove, the upper end of main shaft has the installation convex part of embedding mounting groove, the lateral surface of bearing frame has the annular groove of stepping down that supplies the installation convex part to step down.

Furthermore, the transmission mechanism comprises a belt and a transmission wheel, the transmission wheel is sleeved on the motor shaft, and the belt is wound on the transmission wheel and the driving shaft.

Furthermore, a fourth through hole for a belt to pass through is formed in the bearing seat, and the fourth through hole is horizontally arranged.

After the structure is adopted, when the main shaft works, gas is introduced into the cutter head, the gas enters the mounting hole, and the gas sequentially enters the third gap and the fourth gap to enter the first gap. The abutting part of the sealing element is separated from the main shaft under the action of air pressure, so that the friction of the main shaft to the sealing element is reduced, the abrasion of the sealing element is reduced, and the service life of the sealing element is prolonged. And gas is constantly blown out in the mounting hole, can blow off the filth in the mounting hole together, plays the effect of clean blade disc inner chamber and ensures that the main shaft rotates more smoothly, can also prevent simultaneously that external filth from flowing back to in the mounting hole through first clearance, further strengthens the sealing performance of blade disc.

In addition, the gas flows through the first gap and then is blown out by the second gap, and the side edge of the second gap is provided with the annular groove, so that the gas can form a convoluted pressurized airflow in the annular groove in the blowing-out process, dirt and cutting fluid in the cutter head are quickly discharged out of the second gap, and meanwhile, the convoluted pressurized airflow can further prevent the cutting fluid from reversely flowing back from the outside, and the sealing effect is further improved.

Drawings

Fig. 1 is a perspective view of the external structure of the turret of the present invention.

Fig. 2 is a perspective view of another external structure of the turret of the invention.

Fig. 3 is a schematic cross-sectional structure of the present invention.

Fig. 4 is a partially enlarged view of the area a in fig. 3.

Fig. 5 is a schematic partial cross-sectional view of the structure when the second side wall is blown open.

Fig. 6 is a schematic sectional view of the structure of the sealing member.

Fig. 7 is a partially enlarged view of the area B in fig. 3.

Fig. 8 is a schematic sectional view of the main body 1.

Fig. 9 is a perspective view of the external structure of the cylinder shaft.

Detailed Description

In order to further explain the technical solution of the present invention, the present invention is explained in detail by the following specific examples.

As shown in fig. 1 to 9, a spindle sealing structure includes a mounting hole 11 for inserting and rotatably fitting a spindle 1, and further includes a mounting seat 31 provided at an upper opening of the mounting hole 11. The mounting seat 31 is locked at the opening of the mounting hole 11 by a screw, the mounting seat 31 is provided with a first through hole 311, the spindle 2 has a lower end portion 21 extending into the first through hole 311, a first gap 32 is formed between the first through hole 311 and the outer side surface of the lower end portion 21, an annular sealing groove 312 is formed in the side wall of the first through hole 311, and a sealing element 33 is embedded in the annular sealing groove 312. After the structure is adopted, when the cutter does not work, the sealing element 33 can seal the first gap 32, so that external liquid or dirt is prevented from entering the mounting hole 11, and the rotation work of the main shaft 2 is influenced; when the cutter works, air is introduced into the mounting hole 11, so that the air enters the first gap 32 from the mounting hole 11. Under the action of the gas blowing force, the sealing element 33 is blown to be separated from the main shaft 2, and the first gap 32 is smooth, so that the friction of the main shaft 2 to the sealing element 33 is reduced, the abrasion of the sealing element 33 is reduced, and the service life of the sealing element 33 is prolonged. And the gas is continuously blown out from the mounting hole 11, so that the dirt in the mounting hole 11 can be blown out together, the effect of cleaning the mounting hole 11 is achieved, the main shaft 2 is ensured to rotate more smoothly, meanwhile, the external dirt can be prevented from flowing back into the mounting hole 11 through the first gap 32, and the sealing performance of the main shaft 2 is further enhanced.

Preferably, the sealing element 33 includes a first side wall 331 abutting against a side wall of the annular sealing groove 312, a second side wall 332 abutting against a side wall of the main shaft 2, and an upper wall 333 connecting an upper end of the first side wall 331 and an upper end of the second side wall 332, a blocking groove 334 is formed between the first side wall 331, the second side wall 332 and the upper wall 333, and the blocking groove 334 can be used for storing backflow liquid and dirt, so as to prevent the first gap 32 from being blocked due to long-term accumulation; the second sidewall 332 has a connection part 3321 vertically connected to the connection upper wall 333, and an abutting part 3322 inclined and abutting against a sidewall of the main shaft 2. When the main shaft 2 does not work, the abutting part 3322 abuts against the main shaft 2 to play a role in blocking the first gap 32; when the spindle 2 works, the abutting portion 3322 is deflected toward the blocking groove 334 by the blowing force of the gas, so that the first gap 32 is unobstructed. And a certain gap is formed between the connecting part 3321 and the main shaft 2, so that the gas can conveniently enter the blowing abutting part 3322 and be separated from the main shaft 2.

Preferably, the abutting portion 3322 has a first inclined surface 3323 disposed outside the second side wall 332 and a second inclined surface 3324 disposed inside the second side wall 332, and the first inclined surface 3323 and the second inclined surface 3324 are inclined gradually from top to bottom toward the lower end portion 21. By adopting the structure, the first inclined surface 3323 can increase the force-bearing area of the abutting part 3322 blown by gas, so that the abutting part 3322 is conveniently separated from the main shaft 2; the second inclined surface 3324 has a certain guiding function, so that liquid and dirt flowing in from the outside can enter the blocking groove 334 along the second inclined surface 3324 after passing through the first gap 32, and the dirt is prevented from being accumulated to block the first gap 32; in addition, the lower ends of the first inclined surface 3323 and the second inclined surface 3324 are connected with each other, so that the abutting portion 3322 is in an inverted triangle shape, a better supporting effect is achieved, the abutting portion 3322 is more firmly abutted against the side surface of the main shaft 2, and the abutting sealing effect of the sealing element 33 is further improved.

Preferably, the lower surface of the mounting seat 31 is further provided with a fixing protruding ring 315 protruding downward, the outer circumferential surface of the lower end portion 21 is provided with an annular boss 211 protruding outward, the upper surface of the annular boss 211 is provided with an annular boss 212 for the fixing protruding ring 315 to extend into, and a second gap 34 is formed between the groove bottom wall and the side groove wall of the annular boss 212 and the fixing protruding ring 315. After adopting above-mentioned structure, the gas stream passes through behind the first clearance 32 and discharges through second clearance 34, and second clearance 34 sets up with first clearance 32 is perpendicular, enables in external liquid and the filth is more difficult to get into first clearance 32 to further improve sealed effect. And the fixed boss and the annular boss 212 are matched to play a role in accurate positioning, so that the main shaft 2 and the mounting seat 31 are connected more firmly and reliably.

Preferably, the outer side wall of the fixing protrusion ring 315 is further provided with an annular groove 313. By adopting the structure, the gas flows through the first gap 32 and then is blown out from the second gap 34, the side edge of the second gap 34 is provided with the annular groove 313, so that the gas can form a convoluted pressurized gas flow in the annular groove 313 in the blowing-out process, dirt and cutting fluid in the mounting hole 11 can be quickly discharged out of the second gap 34, meanwhile, the convoluted pressurized gas flow can further prevent the cutting fluid from reversely flowing back from the outside, and the sealing effect is further improved.

Preferably, the annular groove 313 has a lower groove wall and an inclined groove wall connected with each other, and the inclined groove wall is inclined from bottom to top toward the outer side wall of the fixed convex ring 315. After the structure is adopted, the cross section of the annular groove 313 is in a triangular structure, and gas exhausted from the mounting hole 11 tightly flows into the annular groove 313 from the second gap 34 and flows along the surfaces of the lower groove wall and the inclined groove wall, so that a swirling flow is formed, cutting fluid is prevented from reversely flowing back from the outside, and the sealing effect is improved.

Preferably, an annular fixing plate 35 is further disposed above the lower end portion 21, a third gap 36 is provided between an outer circumferential side surface of the annular fixing plate 35 and the mounting seat 31, and a fourth gap 37 is provided between a lower surface of the annular fixing plate 35 and the mounting seat 31. By adopting the structure, the gas flows through the third gap 36 and the fourth gap 37 in sequence and then enters the first gap 32, the annular fixing plate 35 plays a role in shielding and fixing the sealing element 33, the gas is prevented from directly blowing the sealing element, and the sealing ring is prevented from deviating or falling off in the annular sealing groove 312.

Preferably, the upper surface of the mounting seat 31 is provided with a positioning convex ring 314 protruding upwards, and the positioning convex ring 314 is engaged with the mounting hole 11. By adopting the structure, the mounting seat 31 and the mounting hole 11 are connected more firmly.

Preferably, the sealing member 33 is made of a rubber material, and has good elasticity and corrosion resistance.

The invention also provides a cutter tower based on the spindle sealing structure, which further comprises a cutter head 1, a main box body 4, a bearing seat 5 and an air blowing device, wherein a plurality of mounting holes 11 are uniformly distributed on the outer side surface of the cutter head 1, the bearing seat 5 is connected with the main box body 4, a driving shaft 6 is arranged in the bearing seat 5, a second through hole 51 for the driving shaft to extend out is arranged in the bearing seat 5, a third through hole 12 for the bearing seat 5 to insert is arranged in the middle of the cutter head 1, the third through hole 12 is communicated with the mounting holes 11, the main box body 4 is provided with a first air blowing hole 381, the bearing seat 5 is provided with a second air blowing hole 382, the second air blowing hole 382 is communicated with the first air blowing hole 381 and the second through hole 51, and the air outlet end of the air blowing device is communicated with the first air blowing hole 381. With the above structure, the air outlet end of the air blowing device introduces flowing air into the first air blowing hole 381, the air flows through the first air blowing hole 381 and the second air blowing hole 382 in sequence, flows out from the bearing seat 5 and enters the third through hole 12, and then flows into each mounting hole 11. In this embodiment, the air blowing device may specifically adopt an air compressor, and a pipeline is used to communicate an air outlet end of the air compressor with the first air blowing hole 381.

Preferably, the cutter head driving device further comprises a first gear 72, a second gear 73, a third gear 74 and a first motor 71, wherein the first motor 71 is connected to the main box body 4, the first gear 72 is connected with the main box body 4, the second gear 73 is sleeved on the outer side of the first gear 72, the third gear 74 is arranged on the side edges of the first gear 72 and the second gear 73, and the third gear 74 is connected with the cutter head 1; the end faces of the first gear 72 and the second gear 73 close to the third gear 74 are respectively provided with a first end face tooth and a second end face tooth, the third gear 74 is provided with a third end face tooth meshed with the first end face tooth and the second end face tooth, the third gear 74 is close to or far away from the first gear 72 and the second gear 73 through hydraulic driving, and the first motor 71 drives the second gear 73 to rotate. With the above structure, when the cutter head 1 is positioned, the third gear 74 is hydraulically driven to mesh with the first gear 72 and the second gear 73, thereby fixing the cutter head 1; when the cutter head 1 is rotated, the third gear 74 is hydraulically driven to be away from the first gear 72 and the second gear 73, and simultaneously the first motor 71 drives the second gear 73 to rotate, so that the cutter head 1 rotates the switching tool.

Preferably, the bearing block 5 further comprises a cylinder shaft 52, the cylinder shaft 52 is used for connecting the bearing block 5 and the main box body 4, and the first gear 72 and the third gear 74 are sleeved on the cylinder shaft 52; an annular bulge 741 protruding outwards is arranged on the end face of the third gear 74 close to one side of the cutter disc 1, a cylindrical boss 521 protruding outwards is arranged on the outer circumference of the oil cylinder shaft 52, the outer side face of the cylindrical boss 521 is attached to the inner side wall of the annular bulge 741, a first hydraulic cavity 75 is formed between the annular bulge 741 and the oil cylinder shaft 52, and a second hydraulic cavity 76 is formed between the third gear 74, the second gear 73 and the first gear 72. With the above structure, the liquid is introduced into the first hydraulic chamber 75 to push the third gear 74 to approach the second gear 73, and the liquid is introduced into the second hydraulic chamber 76 to push the third gear 74 to separate from the second gear 73.

More preferably, the main housing 4 is provided with a first opening 41, a second opening 42, a third opening 43, a fourth opening 44, a first flow channel 45, a second flow channel 56, the first flow channel 45 communicates with the first opening 41 and the third opening 43, the second flow channel 56 communicates with the second opening 42 and the fourth opening 44, the cylinder shaft 52 is provided with a first liquid inlet 522, a second liquid inlet 523, a first liquid outlet 524, a second liquid outlet 525, a third flow channel 526, and a fourth flow channel 527, the third flow channel 526 communicates with the first liquid inlet 522 and the first liquid outlet 524, the fourth flow channel 527 communicates with the second liquid inlet 523 and the second liquid outlet 525, the first liquid inlet is communicated with the third opening 43, the second liquid inlet 523 is communicated with the fourth opening 44, the first liquid outlet 524 is communicated with the second hydraulic chamber 76, and the second liquid outlet 525 is communicated with the first hydraulic chamber 75. After the structure is adopted, when the cutter head 1 is positioned, liquid enters the first hydraulic cavity 75 through the second opening 42, the second flow channel 56, the fourth opening 44, the second liquid inlet hole 523, the fourth flow channel 527 and the second liquid outlet hole 525 in sequence; when the cutter head 1 is rotated, the liquid passes through the first opening 41, the first flow channel 45, the third opening 43, the first liquid inlet hole 522, the third flow channel 526 and the first liquid outlet hole 524 in sequence and enters the second hydraulic chamber 76.

More preferably, the cutter head driving device further comprises an adapter ring 78 and an oil seal ring 79, the adapter ring 78 is used for connecting the cutter head 1 and the second gear 73, an outwardly convex connecting convex ring 781 is arranged on the end face of one side of the adapter ring 78 facing the second gear 73, and the oil seal ring 79 is sleeved on the connecting convex ring 781 and is connected with the main box body 4. By adopting the structure, the connection between the cutter head 1 and the second gear 73 is firmer, the sealing performance of the second hydraulic cavity 76 is enhanced, and the liquid leakage is prevented.

More preferably, a spacer sleeve 8 is further arranged between the first gear 72 and the third gear 74, the spacer sleeve 8 is sleeved on the cylinder shaft 52, the spacer sleeve 8 is used for sealing and separating the second hydraulic cavity 76, sealing rings are arranged on the upper surface and the lower surface of the spacer sleeve 8, a check valve is arranged in the first gear, after the liquid flows out from the first liquid outlet hole 524, the hydraulic pressure is continuously increased, and when the hydraulic pressure is greater than the pressure of the check valve, the liquid fills the second hydraulic cavity 76 through a flow passage in the first gear so as to abut against the third gear.

Preferably, the spindle driving device is further included, the spindle driving device includes a second motor 91, a motor shaft 92 and a transmission mechanism, the second motor 91 is connected with the motor shaft 92, and the motor shaft 92 is in transmission connection with the driving shaft 6 through the transmission mechanism. With this structure, the second motor 91 drives the motor shaft 92 to rotate, and the motor shaft 92 drives the driving shaft 6 to rotate through the transmission mechanism, and then the driving shaft 6 and the mutually connected main shafts 2 rotate.

More preferably, the lower end of the driving shaft 6 has a mounting groove 61, the upper end of the spindle 2 has a mounting convex portion 22 embedded in the mounting groove 61, the mounting groove 61 and the mounting convex portion 22 extend in a straight line shape, when the driving shaft 6 rotates, the spindle 2 is driven to rotate by the driving torque of the mounting convex portion 22, the lower end of the spindle 2 has a tool mounting hole for mounting a tool, and the outer side surface of the bearing seat 5 has an annular receding groove 53 for receding the mounting convex portion 22.

Preferably, the transmission mechanism includes a belt 93 and a transmission wheel 94, the transmission wheel 94 is sleeved on the motor shaft 92, and the belt 93 is wound on the transmission wheel 94 and the driving shaft 6. The belt 93 is used for transmission connection, so that the operation is more stable, the noise is low, and the vibration can be reduced.

Preferably, the bearing housing 5 is provided with a fourth through hole 54 through which the belt 93 passes, and the fourth through hole 54 is horizontally disposed.

The above embodiments and drawings are not intended to limit the form and style of the present invention, and any suitable changes or modifications thereof by those skilled in the art should be considered as not departing from the scope of the present invention.

Claims (15)

1. A main shaft sealing structure comprises a mounting hole for a main shaft to be inserted into and rotatably matched, and is characterized by further comprising a mounting seat arranged on the mounting hole, wherein the mounting seat is provided with a first through hole, the main shaft is provided with a lower end part extending into the first through hole, a first gap is formed between the first through hole and the outer side surface of the lower end part, an annular sealing groove is formed in the side wall of the first through hole, and a sealing element is embedded in the annular sealing groove;

the sealing element comprises a first side wall abutting against the side wall of the annular sealing groove, a second side wall abutting against the side wall of the main shaft, and an upper wall connecting the upper end of the first side wall and the upper end of the second side wall, wherein a plugging groove is formed among the first side wall, the second side wall and the upper wall; the second side wall is provided with a connecting part vertically connected with the upper wall and an abutting part inclining towards the side wall of the main shaft and abutting against the side wall of the main shaft.

2. The spindle seal structure according to claim 1, wherein the abutting portion has a first inclined surface disposed on an outer side of the second side wall and a second inclined surface disposed on an inner side of the second side wall, and the first inclined surface and the second inclined surface are inclined from top to bottom toward the lower end portion.

3. The spindle seal structure according to claim 1, wherein the lower surface of the mounting seat further has a downwardly protruding fixing protrusion ring, the outer circumferential surface of the lower end portion has an outwardly protruding annular projection, the upper surface of the annular projection has an annular receiving groove into which the fixing protrusion ring extends, and a second gap is formed between the bottom wall and the side wall of the annular receiving groove and the fixing protrusion ring.

4. The spindle seal structure according to claim 3, wherein an annular groove is further provided on an outer side wall of the fixing collar.

5. The spindle seal structure according to claim 4, wherein the annular groove has a lower groove wall and an inclined groove wall connected to each other, and the inclined groove wall is inclined gradually from bottom to top toward the outer side wall of the stationary collar.

6. The spindle seal structure according to claim 3, wherein an annular fixing plate is further provided above the lower end portion, a third gap is provided between an outer circumferential side surface of the annular fixing plate and the mounting seat, and a fourth gap is provided between a lower surface of the annular fixing plate and the mounting seat.

7. The spindle seal structure according to claim 1, wherein the upper surface of the mounting seat is provided with a positioning convex ring protruding upward, and the positioning convex ring is fitted with the mounting hole.

8. A spindle seal arrangement according to any one of claims 1 to 7, characterised in that the seal is made of a rubber material.

9. The utility model provides a sword tower based on any one of claims 1-8 main shaft seal structure, its characterized in that still includes blade disc, main tank body, bearing frame and gas blowing device, the mounting hole sets up on the blade disc, the bearing frame is connected with the main tank body, be equipped with the drive shaft in the bearing frame and the bearing frame is equipped with the second through-hole that supplies the drive to stretch out, the blade disc middle part is equipped with and supplies bearing frame male third through-hole, third through-hole and each mounting hole intercommunication, the main tank body has first gas blowing hole, the bearing frame has the second gas blowing hole, first gas blowing hole of second gas blowing hole intercommunication and second through-hole, gas blowing device's the end of giving vent to anger communicates with first gas blowing hole.

10. The turret of claim 9, further comprising a cutter head driving device, wherein the cutter head driving device further comprises a first gear, a second gear, a third gear, and a first motor, wherein the first motor is connected to the main housing, the first gear is connected to the main housing, the second gear is sleeved on an outer side of the first gear, the third gear is disposed on a side of the first gear and the second gear, and the third gear is connected to the cutter head; the end faces of the first gear and the second gear, which are close to the third gear, are respectively provided with a first end face tooth and a second end face tooth, the third gear is provided with a third end face tooth meshed with the first end face tooth and the second end face tooth, the third gear is close to or far away from the first gear and the second gear through hydraulic driving, and the first motor drives the second gear to rotate.

11. The turret according to claim 10, wherein the bearing block further comprises a cylinder shaft for connecting the bearing block and the main housing, the first gear and the third gear being fitted over the cylinder shaft; the end face of the third gear, which is close to one side of the cutter head, is provided with an annular bulge, the outer circumference of the oil cylinder shaft is provided with an annular bulge, the outer side face of the cylindrical bulge is attached to the inner side wall of the annular bulge, a first hydraulic cavity is formed between the annular bulge and the oil cylinder shaft, and a second hydraulic cavity is formed between the third gear and the second gear as well as the first gear.

12. The turret according to claim 11, further comprising a spindle drive, wherein the spindle drive comprises a second motor, a motor shaft, and a transmission mechanism, the second motor is connected to the motor shaft, and the motor shaft is in transmission connection with the drive shaft through the transmission mechanism.

13. The turret according to claim 12, wherein the lower end of the driving shaft has a mounting groove, the upper end of the main shaft has a mounting protrusion inserted into the mounting groove, and the outer side surface of the bearing housing has an annular recess for the mounting protrusion to recess.

14. The turret of claim 13, wherein the drive mechanism includes a belt and a drive wheel, the drive wheel is mounted on the shaft of the motor, and the belt is wound around the drive wheel and the drive shaft.

15. The turret of claim 14, wherein a fourth through hole is formed in the bearing housing for a belt to pass through, the fourth through hole being horizontally disposed.

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