CN107570733A - Main spindle box of numerical control system with embedded arrestment mechanism - Google Patents
Main spindle box of numerical control system with embedded arrestment mechanism Download PDFInfo
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- CN107570733A CN107570733A CN201710927200.5A CN201710927200A CN107570733A CN 107570733 A CN107570733 A CN 107570733A CN 201710927200 A CN201710927200 A CN 201710927200A CN 107570733 A CN107570733 A CN 107570733A
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- bearing
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- deep groove
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- 239000003921 oil Substances 0.000 claims description 81
- 238000007789 sealing Methods 0.000 claims description 62
- 230000005389 magnetism Effects 0.000 claims description 29
- 239000010687 lubricating oil Substances 0.000 claims description 19
- 125000006850 spacer group Chemical group 0.000 claims description 18
- 229910000831 Steel Inorganic materials 0.000 claims description 11
- 239000010959 steel Substances 0.000 claims description 11
- 239000002828 fuel tank Substances 0.000 claims description 9
- 229920000459 Nitrile rubber Polymers 0.000 claims description 8
- 238000012856 packing Methods 0.000 claims description 8
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Abstract
The invention discloses a kind of main spindle box of numerical control system of the embedded arrestment mechanism of band, including casing and main shaft；Also include spindle brake, bearing seal system, bearing pre-tightened backlash eliminating equipment, and bearing lubrication system.This main-shaft box system, the brake drag provided mainly by the detent bumps of embedded radial groove during to active brake, the fretting wear speed of embedded rings is slow in braking procedure, service life length.And the bearing seal system of this main-shaft box system can play dust-proof protective effect to bearing, moreover it is possible to cooling down effect is played to bearing inner race and main shaft, can improve main shaft and bearing inner race rigidity, keeps spindle rotation accuracy.And bearing pre-tightened backlash eliminating equipment can eliminate gap caused by bearing wear automatically so that the rigidity of the first deep groove ball bearing and the second deep groove ball bearing greatly enhances, and the rigidity of raising axis system that can be very big, improves spindle rotation accuracy and machine finish.
Description
Technical field
The present invention relates to machine tool technology field, more particularly to a kind of main spindle box of Digit Control Machine Tool.
Background technology
Main spindle box is the important part of lathe, and it includes casing, spindle unit etc..Spindle unit is generally by main shaft, axle
Hold and formed with driving member (gear or belt wheel) etc..Main shaft is mainly used to support driving parts such as gear, belt wheel in lathe, transmits
Motion and moment of torsion, workpiece or cutter rotation etc. are driven, as the Digit Control Machine Tool processed in high precision, to the quality requirement of spindle unit
It is very high.
Main shaft radial force is big in process for lathe, and axially loaded is relatively small, so the radial direction of supporting spindle
Shaft strength ability is very crucial.In the prior art frequently with deep groove ball bearing supporting spindle, because bearing reason causes processing essence
The factor that degree reduces mainly has：
1st, gap be present between the inner ring and outer ring and steel ball of bearing so that when main shaft is by radial load, alignment of shafts meeting
Skew is produced, reduces machining accuracy.
2nd, bearing wear, cause bearing clearance to increase, reduce machining accuracy.
3rd, bearing high-speed motion, temperature rise, causes bearing rigidity to reduce, influences machining accuracy.
And the rigidity of main shaft is also an important factor for influenceing machine finish.Work in-process, cutting metal can produce greatly
Calorimetric amount, the cooled liquid band in cutting heat part is walked, and part can pass to main shaft, cause main shaft temperature to raise, main shaft heating meeting
Main shaft rigidity is reduced, can also influence machining accuracy.
In the prior art, machine tool chief axis generally use frictional force brakes, because lathe start and stop are frequent, brake rubs simultaneously
Pad abrasion is very fast, and friction plate service life is shorter, and replacement frequency is higher.
The content of the invention
In view of this, it is an object of the invention to provide a kind of main spindle box of numerical control system of the embedded arrestment mechanism of band,
To solve the technical problem that bearing clearance, bearing wear, bearing and main shaft heating etc. cause machine finish to reduce；And solution
The technical problem that certainly the friction disc wear speed of spindle brake is fast, service life is short.
Main spindle box of numerical control system of the invention with embedded arrestment mechanism, including casing and main shaft；The casing
Formed with bearing block on medial surface, the front end of the main shaft is installed on the bearing block of box inside by two deep groove ball bearings
On, the first deep groove ball bearing in described two deep groove ball bearings is in the middle part of casing, and the second deep groove ball bearing is outside casing
Side；The rear end of the main shaft is arranged on casing by angular contact bearing；
The main-shaft box system also includes spindle brake, and the spindle brake includes being fixed by screws on main shaft
Brake hoop, the brake hoop is close to angular contact bearing；The brake also include being fixed on driving cylinder on cabinet wall and
The pressure ring being fixed on driving cylinder piston rod, the driving cylinder is along main shaft circumferential directions at least two, and the pressure ring is by bullet
Property embedded rings made of the material and stiffening ring composition that is fixedly connected with embedded rings, and pressure ring and brake hoop are coaxial；The braking
Ring is between angular contact bearing and pressure ring, and with being provided with radial groove on the side of embedded rings face on brake hoop；
The main-shaft box system also includes bearing seal system, and the bearing seal system includes being bolted in axle
Bearing cap on bearing end face, the annular boss being pressed on the first deep groove ball bearing is provided with the bearing cap, bearing cap
Middle part has the shaft sleeve part coordinated with main shaft, and the first sealing for gap between sealing axle sleeve and main shaft is provided with the axle sleeve
Enclose, the first end cap for preventing the first sealing ring from coming off is provided with the end face of axle sleeve；Coordinate on the casing with front-end of spindle
The second sealing ring is provided with axis hole wall, second sealing ring is used between sealing between front-end of spindle and casing upper shaft hole
Gap, the second end cap for fixing the second sealing ring is provided with casing end face；On the casing with the inner ring of the second deep groove ball bearing
The 3rd sealing ring is provided with relative position, between the 3rd sealing ring is used between seal case and 3rd bearing end face
Gap；First sealing ring, the second sealing ring and the 3rd sealing ring are v-ring；
The bearing seal system also includes pressurized seal system, the pressurized seal system include air compressor, with
The air purifier of air compressor connection, the air dryer being connected with air purifier, the gas being connected with air dryer
Body vacuum tank, the first pressure regulator valve tank connected with gas voltage stabilizing, the inlet suction port being connected with the first pressure regulator valve, the inlet suction port
If including ring pipe, it is arranged on the suction nozzle connected on ring pipe with the first pressure regulator valve and is evenly arranged on ring pipe
Dry outlet nozzle, the outlet nozzle is arranged on bearing cap, and the inner ring end face face of outlet nozzle and the first deep groove ball bearing；Institute
State and first annular air slot and the second ring-shaped gas-guiding trench be provided with main shaft, first annular air slot close to clutch shaft bearing end face with
Gap between bearing cap, gap of second ring-shaped gas-guiding trench between second bearing end face and casing；The table of the main shaft
The axial air slot for connecting first annular air slot and the second ring-shaped gas-guiding trench is additionally provided with face, the axial air slot edge is main
Axle circumferencial direction is evenly arranged some；
The main spindle box of numerical control system of the embedded arrestment mechanism of band also includes bearing pre-tightened backlash eliminating equipment, the axle
Holding pretension backlash eliminating equipment includes being arranged on spacer ring between the first deep groove ball bearing and the second deep groove ball bearing, and the two of the spacer ring
Side is attached on the cycle surface of the first deep groove ball bearing and the second deep groove ball bearing respectively；The bearing pre-tightened backlash eliminating equipment is also
Including the left permanent magnetism ring body being separately positioned on the first deep groove ball bearing and the second deep groove ball bearing inner ring end face and right permanent-magnetic clamp
The opposite face of body, the left permanent magnetism ring body and right permanent magnetism ring body is magnetic pole of the same name, and the phase of left permanent magnetism ring body and right permanent magnetism ring body
Portion is also embedded in same elastic packing ring set；First deep-groove ball and the second deep groove ball bearing inner ring in left permanent magnetism ring body and
It is pressed against on steel ball, makes between outer ring, steel ball and the inner ring three of deep groove ball bearing directly under the repulsive force effect of right permanent magnetism ring body
Contact；
The main spindle box of numerical control system of the embedded arrestment mechanism of band also includes bearing lubrication system, the bearing profit
Sliding system includes fuel tank, oil filter, oil pump, cooler, the second pressure regulator valve, inlet nozzle and oil outlet, and the oil filter enters
Hydraulic fluid port is connected with fuel tank, and the oil-out of oil filter and the oil inlet end of oil pump connect, the oil outlet end of oil pump and the oil inlet of cooler
Connection, the oil-out of cooler are connected with the second pressure regulator valve, and the inlet nozzle is arranged on the top of bearing block, and inlet nozzle is used for
Lubricating oil is sent into bearing, the oil outlet is arranged on the bottom of bearing block, and oil outlet is used to lubricating oil taking back fuel tank；
The first half of the spacer ring and lower half are respectively arranged with upper the arc oil groove and arc lower oil groove being separated from each other, and are also set on spacer ring
The oilhole for extending radially through spacer ring is equipped with, the top and bottom of the oilhole are located at upper arc oil groove and arc lower oil groove respectively
In, the oil inlet passage connected with upper arc oil groove and the oil discharge passage connected with arc lower oil groove are provided with the bearing block,
The inlet nozzle is arranged on oil inlet passage, and the oil outlet is arranged on oil discharge passage.
Further, the elastic packing ring set is made up of nitrile rubber.
Beneficial effects of the present invention：
1st, the main spindle box of numerical control system with embedded arrestment mechanism of the invention, during to active brake, spindle brake
Pulling force is applied to pressure ring by driving cylinder, pressure ring is pressed against on brake hoop side under a stretching force, and the embedded rings on pressure ring exist
It is deformed under the pressure of stiffening ring so that embedded rings produce the detent bumps coordinated with radial groove on brake hoop side, system
Dynamic projection provides brake drag to main shaft, realizes principal shaft braking, and braking is time-consuming short, and because braking is mainly by insertion radial groove
The barrier force that provides of detent bumps, rather than frictionally, therefore embedded rings fretting wear in braking procedure is slow, uses the longevity
Life length.
2nd, the main spindle box of numerical control system of the invention with embedded arrestment mechanism, its bearing seal system set can incite somebody to action
Compressed air is incorporated into the gap location between gap location and front-end of spindle and casing upper shaft hole between axle sleeve and main shaft, in lathe
During work, the sealing lip of the first sealing ring and the second sealing ring is pushed away main shaft by the pressure of compressed air, while the 3rd is sealed
The end face of the deep groove ball bearing of sealing lip thrust second of circle so that the frictional resistance of main shaft is reduced, and can extend sealing ring
Service life.And compressed air can also prevent environmental contaminants such as dust, cooling water from entering in bearing；When lathe is shut down
Afterwards, the sealing lip resilience of sealing ring is pressed on main shaft, so as to can also prevent dust, steam etc. from entering in bearing in the quiescent state；Cause
This bearing seal system can play good protective effect to friction pair in bearing, can extend bearing life.
And compressed air is in the gap location from main shaft between axial air slot front-end of spindle in the same direction and casing upper shaft hole
During, the heat that machining can be delivered to main shaft is taken away, and so as to cool to main shaft, keeps main shaft rigidity,
Keep machine finish.And the cooling to bearing is generally all that lubricating oil is imported into bearing in the prior art, this cold
But mode can not prevent heat on main shaft to bearing inner race transmission so that bearing inner race temperature is influenceed greatly, to work as bearing by main shaft
When inner ring temperature raises, bearing inner race rigidity can reduce, and this causes the reduction of axis system rigidity, and then reduces machining accuracy.
And caused compressed air in this bearing seal system, the heat that machining can be delivered to main shaft are taken away, so as to reduce
Main spindle box bearing inner race transmits heat, while heat caused by bearing rotary partly can also be taken away by compressed air, therefore bearing
Sealing system can not only play dust-proof protective effect to bearing, moreover it is possible to cooling down work is played to bearing inner race and main shaft
With can improve main shaft and bearing inner race rigidity, keep spindle rotation accuracy.
3rd, the main spindle box of numerical control system with embedded arrestment mechanism of the invention, its bearing pre-tightened set disappear gap dress
Put, after the first deep groove ball bearing and the second deep groove ball bearing installation, the first deep groove ball bearing and the second deep groove ball bearing
Inner ring the repulsive force of left permanent magnetism ring body and right permanent magnetism ring body effect under abut against on steel ball, so as to bearing outer ring, steel ball and
It is intimate contact between bearing inner race three, and between the repulsive force that applies of permanent magnetism ring body can eliminate caused by bearing wear automatically
Gap so that the rigidity of the first deep groove ball bearing and the second deep groove ball bearing greatly enhances, can be very big raising axis system it is firm
Property, improve spindle rotation accuracy and machine finish.
4th, the main spindle box of numerical control system of the invention with embedded arrestment mechanism, its bearing lubrication system set will moisten
Lubricating oil is incorporated into bearing, and passes through upper arc oil groove, arc lower oil groove and the oil hole structure on spacer ring and the left magnetic of connection
The elastic sealing ring nested structure of ring body and right permanent magnetism ring body so that lubricating oil can only flow to bearing lower half from the bearing first half,
Good lubrication and cooling can be carried out to Bearing inner, bearing friction abrasion can be reduced and reduce bearing temperature, bearing is protected for a long time
Hold superperformance；And the oil filter in bearing lubrication system is avoided that lubricating oil brings impurity in bearing into, cooler can be
The temperature of lubricating oil keeps stable, so as to further improve lubrication and cooling of the lubricating oil to Bearing inner, keeps bearing
Kilter, and then keep machine tool system machining accuracy.
Brief description of the drawings
Fig. 1 is the structural representation of the main spindle box of numerical control system with embedded arrestment mechanism in embodiment；
Fig. 2 is the enlarged diagram in P portions in Fig. 1；
Fig. 3 is the structural representation of pressurized seal system；
Fig. 4 is the structural representation of bearing lubrication system；
Fig. 5 is the structural representation of spacer ring；
Fig. 6 is the dimensional structure diagram of brake hoop.
Embodiment
The invention will be further described with reference to the accompanying drawings and examples.
As illustrated, the main spindle box of numerical control system of the embedded arrestment mechanism of the present embodiment band, including casing 1 and main shaft
2；On the medial surface of the casing casing is installed on formed with bearing block 3, the front end of the main shaft by two deep groove ball bearings
On the bearing block of inner side, the first deep groove ball bearing 4 in described two deep groove ball bearings is in the middle part of casing, the second deep-groove ball axle
5 are held on the outside of casing；The rear end of the main shaft is arranged on casing by angular contact bearing 6.
The present embodiment main-shaft box system also includes spindle brake, and the spindle brake includes being fixed by screws in master
Brake hoop 40 on axle, the brake hoop is close to angular contact bearing.The brake also includes the drive being fixed on cabinet wall
Move cylinder 41 and be fixed on the pressure ring 42 driven on cylinder piston rod, the driving cylinder in the present embodiment is cylinder.The driving cylinder edge is main
Axle circumferential directions two, the quantity of certain driving cylinder can also be three, more than two other numbers such as four.The pressure ring
Embedded rings 421 and the stiffening ring 422 being fixedly connected with embedded rings form made of elastomeric material, and pressure ring and brake hoop are same
Axle；The brake hoop is between angular contact bearing and pressure ring, and with being provided with footpath on the side of embedded rings face on brake hoop
To groove 43.
The main spindle box of numerical control system of the embedded arrestment mechanism of the present embodiment band, during to active brake, spindle brake
Pulling force is applied to pressure ring by driving cylinder, pressure ring is pressed against on brake hoop side under a stretching force, and the embedded rings on pressure ring exist
It is deformed under the pressure of stiffening ring so that embedded rings produce the detent bumps coordinated with radial groove on brake hoop side, system
It is dynamic raised to provide brake drag to main shaft, realize principal shaft braking, braking is time-consuming short, and due in braking procedure brake force mainly by
The barrier force that the detent bumps of embedded radial groove provide, rather than frictionally, therefore embedded rings rub in braking procedure
Abrasion is slow, service life length.
The main spindle box of numerical control system of the embedded arrestment mechanism of the present embodiment band also includes bearing seal system, the axle
Holding sealing system includes being bolted the bearing cap 7 on bearing block end face, is provided with the bearing cap and is pressed in first
Annular boss 8 on deep groove ball bearing, the middle part of bearing cap have the shaft sleeve part 9 coordinated with main shaft, are provided with the axle sleeve
For first sealing ring 10 in gap between sealing axle sleeve and main shaft, being provided with the end face of axle sleeve prevents what the first sealing ring from coming off
First end cap 11；The second sealing ring 12, second sealing are provided with the axis hole wall coordinated on the casing with front-end of spindle
Enclose for sealing the gap between front-end of spindle and casing upper shaft hole, be provided with casing end face and fix the second of the second sealing ring
End cap 13；It is provided with the 3rd sealing ring 14 on the casing on the position relative with the inner ring of the second deep groove ball bearing, described
Three sealing rings are used for the gap between seal case and 3rd bearing end face；First sealing ring, the second sealing ring and the 3rd are close
Seal is v-ring.
The bearing seal system also includes pressurized seal system, the pressurized seal system include air compressor 15,
The air purifier 16 that is connected with air compressor, the air dryer 17 being connected with air purifier, connect with air dryer
Gas vacuum tank 18, the first pressure regulator valve 19 tank connected with gas voltage stabilizing, the inlet suction port 20 being connected with the first pressure regulator valve connect,
The inlet suction port includes ring pipe 201, is arranged on the suction nozzle 202 that connect on ring pipe with the first pressure regulator valve and uniform
Several outlet nozzles 203 being arranged on ring pipe, the outlet nozzle is arranged on bearing cap, and outlet nozzle and the first deep-groove ball
The inner ring end face face of bearing；The first annular ring-shaped gas-guiding trench 22 of air slot 21 and second, the first ring are provided with the main shaft
Gap of the shape air slot between clutch shaft bearing end face and bearing cap, the second ring-shaped gas-guiding trench is close to second bearing end face and case
Gap between body；The axial direction for connecting first annular air slot and the second ring-shaped gas-guiding trench is additionally provided with the surface of the main shaft
Air slot 23, the axial air slot are evenly arranged some along main shaft circumferencial direction.Inlet suction port in the present embodiment can incite somebody to action
Compressed air is uniformly sent in the gap between clutch shaft bearing end face and bearing cap, while the second ring-shaped gas-guiding trench 22 will can press
Contracting air is uniformly sent to the gap between second bearing end face and casing, so as to form stable pressurized seal, avoids lubricating
Oil leakage.The air purifier in pressurized seal system is avoided that compressed air brings impurity in bearing into simultaneously, is air-dried
Device 17 is avoided that air brings moisture in bearing into so that bearing can be from the damage of impurity and moisture etc..And gas vacuum tank
Stabilization can be carried out to air pressure, avoids pressure oscillation from causing sealing property to fluctuate, and can easily enter by the first pressure regulator valve to gas
Row regulation, ensure that air pressure makes the close of the first sealing ring, the second sealing ring disengaging main shaft and the 3rd sealing ring when lathe works
Seal lip and depart from bearing face, so as to can guarantee that air pressure forms reliable sealing, oil leakage will not occur for guarantee.
The main spindle box of numerical control system of the embedded arrestment mechanism of band also includes bearing pre-tightened backlash eliminating equipment, the axle
The spacer ring 24 that pretension backlash eliminating equipment includes being arranged between the first deep groove ball bearing and the second deep groove ball bearing is held, the spacer ring
Two sides are attached on the cycle surface of the first deep groove ball bearing and the second deep groove ball bearing respectively；The bearing pre-tightened backlash eliminating equipment
Also including the left permanent magnetism ring body 25 being separately positioned on the first deep groove ball bearing and the second deep groove ball bearing inner ring end face and the right side forever
The opposite face of magnetic ring body 26, the left permanent magnetism ring body and right permanent magnetism ring body is magnetic pole of the same name, and left permanent magnetism ring body and right permanent-magnetic clamp
The counterpart of body is also embedded in same elastic packing ring set 27, and elastic packing ring body is after bearing installation in compression shape body；Institute
The first deep-groove ball and the second deep groove ball bearing inner ring is stated to be pressed against under the effect of the repulsive force of left permanent magnetism ring body and right permanent magnetism ring body
On steel ball, make directly to contact between outer ring, steel ball and the inner ring three of deep groove ball bearing.
The main spindle box of numerical control system of the embedded arrestment mechanism of band also includes bearing lubrication system, the bearing profit
Sliding system includes fuel tank 28, oil filter 29, oil pump 30, cooler 31, the second pressure regulator valve 32, inlet nozzle 33 and oil outlet 34,
The oil inlet of the oil filter is connected with fuel tank, and the oil inlet end of the oil-out of oil filter and oil pump connects, the oil outlet end of oil pump with
The oil inlet connection of cooler, the oil-out of cooler are connected with the second pressure regulator valve, and the inlet nozzle is arranged on the top of bearing block
In portion, inlet nozzle is used to lubricating oil being sent into bearing, and the oil outlet is arranged on the bottom of bearing block, and oil outlet is used for will
Lubricating oil takes back fuel tank；The first half of the spacer ring and lower half are respectively arranged with the upper arc oil groove 35 being separated from each other and lower arc
Shape oil groove 36, the oilhole 37 for extending radially through spacer ring is additionally provided with spacer ring, the top and bottom of the oilhole are respectively positioned at upper
In arc oil groove and arc lower oil groove, be provided with the bearing block oil inlet passage 38 that is connected with upper arc oil groove and with lower arc
The oil discharge passage 39 of shape oil groove connection, the inlet nozzle are arranged on oil inlet passage, and the oil outlet is arranged on oil discharge passage.
The main spindle box of numerical control system of the embedded arrestment mechanism of the present embodiment band, its bearing seal system set can incite somebody to action
Compressed air is incorporated into the gap location between gap location and front-end of spindle and casing upper shaft hole between axle sleeve and main shaft, in lathe
During work, the sealing lip of the first sealing ring and the second sealing ring is pushed away main shaft by the pressure of compressed air, while the 3rd is sealed
The end face of the deep groove ball bearing of sealing lip thrust second of circle so that the frictional resistance of main shaft is reduced, and can extend sealing ring
Service life.And compressed air can also prevent environmental contaminants such as dust, steam from entering in bearing；After lathe is shut down,
The sealing lip resilience of sealing ring is pressed on main shaft, so as to can also prevent dust, steam etc. from entering in bearing in the quiescent state；Therefore should
Bearing seal system can play good protective effect to friction pair in bearing, can extend bearing life.
And compressed air is in the gap location from main shaft between axial air slot front-end of spindle in the same direction and casing upper shaft hole
During, the heat that machining can be delivered to main shaft is taken away, and so as to cool to main shaft, keeps main shaft rigidity,
Keep machine finish.And the cooling to bearing is generally all that lubricating oil is imported into bearing in the prior art, this cold
But mode can not prevent heat on main shaft to bearing inner race transmission so that bearing inner race temperature is influenceed greatly, to work as bearing by main shaft
When inner ring temperature raises, bearing inner race rigidity can reduce, and this causes the reduction of axis system rigidity, and then reduces machining accuracy.
And caused compressed air in this bearing seal system, the heat that machining can be delivered to main shaft are taken away, so as to reduce
Main spindle box bearing inner race transmits heat, while heat caused by bearing rotary partly can also be taken away by compressed air, therefore bearing
Sealing system can not only play dust-proof protective effect to bearing, moreover it is possible to cooling down work is played to bearing inner race and main shaft
With can improve main shaft and bearing inner race rigidity, keep spindle rotation accuracy.
The main spindle box of numerical control system of the embedded arrestment mechanism of the present embodiment band, its set bearing pre-tightened disappear gap dress
Put, after the first deep groove ball bearing and the second deep groove ball bearing installation, the first deep groove ball bearing and the second deep groove ball bearing
Inner ring the repulsive force of left permanent magnetism ring body and right permanent magnetism ring body effect under abut against on steel ball, so as to bearing outer ring, steel ball and
It is intimate contact between bearing inner race three, and between the repulsive force that applies of permanent magnetism ring body can eliminate caused by bearing wear automatically
Gap so that the rigidity of the first deep groove ball bearing and the second deep groove ball bearing greatly enhances, can be very big raising axis system it is firm
Property, improve spindle rotation accuracy and machine finish.
The main spindle box of numerical control system of the embedded arrestment mechanism of the present embodiment band, its bearing lubrication system set will moisten
Lubricating oil is incorporated into bearing, and passes through upper arc oil groove, arc lower oil groove and the oil hole structure on spacer ring and the left magnetic of connection
The elastic sealing ring nested structure of ring body and right permanent magnetism ring body so that lubricating oil can only flow to bearing lower half from the bearing first half,
Good lubrication and cooling can be carried out to Bearing inner, bearing friction abrasion can be reduced and reduce bearing temperature, bearing is protected for a long time
Hold superperformance；And the oil filter in bearing lubrication system is avoided that lubricating oil brings impurity in bearing into, cooler can be
The temperature of lubricating oil keeps stable, so as to further improve lubrication and cooling of the lubricating oil to Bearing inner, keeps bearing
Kilter, and then keep machine tool system machining accuracy.
In the present embodiment, the elastic packing ring set is made up of nitrile rubber.In the present embodiment, first sealing ring,
Also nitrile rubber is made for second sealing ring and the 3rd sealing ring.
The nitrile rubber of elastic packing ring set is made in the present embodiment by weight percentage, it is composed of the following components：
Nitrile rubber 50-80 parts；
Metallic fiber 6-10 parts；
Stearic acid 0.5-1.0 parts；
Cupric oxide 2-3 parts；
Calcium oxide 0.5-1 parts；
Metallic fiber 6-10 parts；
Adipic acid dibutyl ester 5~10,
Dioctyl sebacate 5~10,
Diethyl phthalate 3-8 parts
Tissuemat E 1-3 parts
Accelerator 0.5-1.5 parts
Antiozonant 1-3 parts
Age resistor 0-3 parts
Carbon black 20-30 parts
Antioxidant D DA 0.5~1.5.
By increasing metallic fiber composition in nitrile rubber in the present embodiment, the anti-wear performance of nitrile rubber is improved,
Rebound performance has also arrived lifting simultaneously.It can make sealing ring that there is longer service life and better seal performance.
Finally illustrate, the above embodiments are merely illustrative of the technical solutions of the present invention and it is unrestricted, although with reference to compared with
The present invention is described in detail good embodiment, it will be understood by those within the art that, can be to the skill of the present invention
Art scheme is modified or equivalent substitution, and without departing from the objective and scope of technical solution of the present invention, it all should cover at this
Among the right of invention.
Claims (2)
1. a kind of main spindle box of numerical control system of the embedded arrestment mechanism of band, including casing and main shaft；The inner side of the casing
It is installed on face formed with bearing block, the front end of the main shaft by two deep groove ball bearings on the bearing block of box inside, institute
The first deep groove ball bearing in two deep groove ball bearings is stated in the middle part of casing, the second deep groove ball bearing is on the outside of casing；Institute
The rear end for stating main shaft is arranged on casing by angular contact bearing；It is characterized in that：
The main-shaft box system also includes spindle brake, and the spindle brake includes the system being fixed by screws on main shaft
Rotating ring, the brake hoop is close to angular contact bearing；The brake also includes driving cylinder and the fixation being fixed on cabinet wall
Pressure ring on driving cylinder piston rod, the driving cylinder is along main shaft circumferential directions at least two, and the pressure ring is by elastic material
Embedded rings made of material and the stiffening ring composition being fixedly connected with embedded rings, and pressure ring and brake hoop are coaxial；The brake hoop position
Between angular contact bearing and pressure ring, and with being provided with radial groove on the side of embedded rings face on brake hoop；
The main-shaft box system also includes bearing seal system, and the bearing seal system includes being bolted in bearing block
Bearing cap on end face, the annular boss being pressed on the first deep groove ball bearing, the middle part of bearing cap are provided with the bearing cap
With the shaft sleeve part coordinated with main shaft, the first sealing ring for gap between sealing axle sleeve and main shaft is provided with the axle sleeve,
The first end cap for preventing the first sealing ring from coming off is provided with the end face of axle sleeve；The axis hole coordinated on the casing with front-end of spindle
The second sealing ring is provided with wall, second sealing ring is used to seal the gap between front-end of spindle and casing upper shaft hole, case
The second end cap for fixing the second sealing ring is provided with body end face；It is relative with the inner ring of the second deep groove ball bearing on the casing
The 3rd sealing ring is provided with position, the 3rd sealing ring is used for the gap between seal case and 3rd bearing end face；It is described
First sealing ring, the second sealing ring and the 3rd sealing ring are v-ring；
The bearing seal system also includes pressurized seal system, and the pressurized seal system includes air compressor and air
The air purifier of compressor connection, air dryer, the gas that is connected with air dryer being connected with air purifier are steady
Tank, the first pressure regulator valve tank connected with gas voltage stabilizing, the inlet suction port being connected with the first pressure regulator valve are pressed, the inlet suction port includes
Ring pipe, several for being arranged on the suction nozzle connected on ring pipe with the first pressure regulator valve and being evenly arranged on ring pipe
Outlet nozzle, the outlet nozzle is arranged on bearing cap, and the inner ring end face face of outlet nozzle and the first deep groove ball bearing；The master
First annular air slot and the second ring-shaped gas-guiding trench are provided with axle, first annular air slot is close to clutch shaft bearing end face and bearing
Gap between lid, gap of second ring-shaped gas-guiding trench between second bearing end face and casing；On the surface of the main shaft
The axial air slot for connecting first annular air slot and the second ring-shaped gas-guiding trench is additionally provided with, the axial air slot is justified along main shaft
Circumferential direction is evenly arranged some；
The main spindle box of numerical control system of the embedded arrestment mechanism of band also includes bearing pre-tightened backlash eliminating equipment, and the bearing is pre-
Tight backlash eliminating equipment includes the spacer ring being arranged between the first deep groove ball bearing and the second deep groove ball bearing, the two sides of the spacer ring
It is attached to respectively on the cycle surface of the first deep groove ball bearing and the second deep groove ball bearing；The bearing pre-tightened backlash eliminating equipment also includes
It is separately positioned on the first deep groove ball bearing and the left permanent magnetism ring body on the second deep groove ball bearing inner ring end face and right permanent magnetism ring body, institute
The opposite face for stating left permanent magnetism ring body and right permanent magnetism ring body is magnetic pole of the same name, and the counterpart of left permanent magnetism ring body and right permanent magnetism ring body is also
In same elastic packing ring set；First deep-groove ball and the second deep groove ball bearing inner ring are in left permanent magnetism ring body and right permanent magnetism
It is pressed against under the repulsive force effect of ring body on steel ball, makes directly to contact between outer ring, steel ball and the inner ring three of deep groove ball bearing；
The main spindle box of numerical control system of the embedded arrestment mechanism of band also includes bearing lubrication system, the bearing lubrication system
System includes fuel tank, oil filter, oil pump, cooler, the second pressure regulator valve, inlet nozzle and oil outlet, the oil inlet of the oil filter
It is connected with fuel tank, the oil-out of oil filter and the oil inlet end of oil pump connect, and the oil outlet end of oil pump and the oil inlet of cooler connect,
The oil-out of cooler is connected with the second pressure regulator valve, and the inlet nozzle is arranged on the top of bearing block, and inlet nozzle is used for will profit
Lubricating oil is sent into bearing, and the oil outlet is arranged on the bottom of bearing block, and oil outlet is used to lubricating oil taking back fuel tank；It is described
The first half of spacer ring and lower half are respectively arranged with upper the arc oil groove and arc lower oil groove being separated from each other, and are additionally provided with spacer ring
The oilhole of spacer ring is extended radially through, the top and bottom of the oilhole are located in upper arc oil groove and arc lower oil groove respectively, institute
State and the oil inlet passage connected with upper arc oil groove and the oil discharge passage connected with arc lower oil groove be provided with bearing block, it is described enter
Oil nozzle is arranged on oil inlet passage, and the oil outlet is arranged on oil discharge passage.
2. the main spindle box of numerical control system of the embedded arrestment mechanism of band according to claim 1, it is characterised in that：It is described
Elastic packing ring set is made up of nitrile rubber.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710927200.5A CN107570733B (en) | 2017-09-29 | 2017-09-29 | Numerical control machine tool spindle box system with embedded brake mechanism |
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| CN201710927200.5A CN107570733B (en) | 2017-09-29 | 2017-09-29 | Numerical control machine tool spindle box system with embedded brake mechanism |
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| CN107570733A true CN107570733A (en) | 2018-01-12 |
| CN107570733B CN107570733B (en) | 2024-06-11 |
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| CN201710927200.5A Active CN107570733B (en) | 2017-09-29 | 2017-09-29 | Numerical control machine tool spindle box system with embedded brake mechanism |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110640035A (en) * | 2019-08-29 | 2020-01-03 | 松阳永信机械制造有限公司 | Seamless pipe head reducing machine |
| CN111843603A (en) * | 2020-06-05 | 2020-10-30 | 泉州市海恩德机电科技发展有限公司 | Cutting machine that heat dispersion is good |
| CN112524152A (en) * | 2019-09-17 | 2021-03-19 | 福建金风科技有限公司 | Bearing clearance adjusting device and method and wind generating set |
| CN113523325A (en) * | 2021-09-17 | 2021-10-22 | 佛山智昂科技有限公司 | Machine tool spindle and numerical control machine tool |
| CN113700734A (en) * | 2021-08-25 | 2021-11-26 | 常熟得美零部件有限公司 | Wheel hub type moving guide device of agricultural greenhouse covering material collecting and releasing machine |
| CN114454091A (en) * | 2022-02-09 | 2022-05-10 | 广东创能精密机械有限公司 | Main shaft capable of adjusting bearing pretightening force electromagnetically |
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| CN114454091A (en) * | 2022-02-09 | 2022-05-10 | 广东创能精密机械有限公司 | Main shaft capable of adjusting bearing pretightening force electromagnetically |
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