CN108247535A - A kind of numerically control grinder electro spindle for having self-adjustable bearing pretightning force - Google Patents
A kind of numerically control grinder electro spindle for having self-adjustable bearing pretightning force Download PDFInfo
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- CN108247535A CN108247535A CN201810209237.9A CN201810209237A CN108247535A CN 108247535 A CN108247535 A CN 108247535A CN 201810209237 A CN201810209237 A CN 201810209237A CN 108247535 A CN108247535 A CN 108247535A
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- bearing
- cooling water
- piezoelectric ceramics
- contact ball
- main shaft
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- 239000000498 cooling water Substances 0.000 claims abstract description 55
- 239000000919 ceramic Substances 0.000 claims abstract description 46
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 38
- 238000001816 cooling Methods 0.000 claims abstract description 34
- 230000001050 lubricating effect Effects 0.000 claims abstract description 20
- 230000007246 mechanism Effects 0.000 claims abstract description 14
- 239000003921 oil Substances 0.000 claims description 47
- 239000010687 lubricating oil Substances 0.000 claims description 10
- 229910052573 porcelain Inorganic materials 0.000 claims description 3
- 239000004519 grease Substances 0.000 claims 2
- 206010037660 Pyrexia Diseases 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 230000008859 change Effects 0.000 abstract description 3
- 230000007423 decrease Effects 0.000 abstract description 2
- 230000005855 radiation Effects 0.000 abstract 2
- 239000000314 lubricant Substances 0.000 abstract 1
- 238000005461 lubrication Methods 0.000 description 7
- 238000003754 machining Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229940085771 feverall Drugs 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/04—Headstocks; Working-spindles; Features relating thereto
Abstract
A kind of numerically control grinder electro spindle for having self-adjustable bearing pretightning force, rotor loss fever for electro spindle devises double water-cooling structures, the high efficiency and heat radiation of rotor is realized by two layers of cooling jacket inside and outside housing, reduces influence of the fever high temperature of rotor to main shaft and bearing；It generates heat for bearing self friction, bearing outer ring fixing sleeve is designed to cooling water jacket structure, the high efficiency and heat radiation of bearing is realized by the bearing outer ring fixing sleeve with water cooling function, then be aided with high-efficiency lubricating, to reduce the thermal deformation of bearing；But under higher speed conditions, water cooling can decline with lubricant effect, influence of thermal deformation must be offset by applying suitable pretightning force to bearing, bearing temperature is monitored by the temperature sensor of bearing pre-fastening automatic adjusting mechanism in real time first, and by the bearing temperature data feedback monitored to numerical control system of grinding machine, control signal is exported by numerical control system of grinding machine again, the elongation of piezoelectric ceramics column is made to change, to generate suitable bearing pre-fastening.
Description
Technical field
The invention belongs to electrical spindle for machine tool technical field, more particularly to a kind of number for having self-adjustable bearing pretightning force
Control Grinder Spindle.
Background technology
Recent years, more and more numerically control grinders employed electro spindle, and electro spindle has compact-sized, light-weight, inertia
Small, the advantages that noise is low, response is fast, rotating speed is high and power is big, electro spindle is that grinding machine spindle and spindle drive motor combine together
New technology, and this drive mechanism form by grinding machine spindle and spindle drive motor " being combined into one " effectively makes spindle unit
It is relatively independent from the transmission system and overall structure of grinding machine to come out, and grinding machine spindle is then directly driven by built-in motor,
So as to which the length of grinding machine main drive chain is shorten to zero, realize " Zero-drive Chain " of grinding machine.
Since the machining accuracy of grinding machine directly determines the Precision Machining quality of part, while the running precision of electro spindle is again
The machining accuracy of grinding machine is directly affected, therefore, it is desirable to ensure the Precision Machining quality of part, just it has to be ensured that the fortune of electro spindle
Row precision.And the running precision of electro spindle is codetermined by factors, one of them is the pretightning force of bearing, axis
The core component for electro spindle is made, bearing pre-fastening not only decides performance and the service life of bearing, can also influence electro spindle axis
The Oscillation Amplitude at end, with the variation of processing operating mode, the temperature of bearing may be increased quickly, and bearing is caused thermal deformation occur,
And the support accuracy of bearing can also change correspondingly, in order to reduce the amplitude of variation of bearings precision, usual means are exactly to pass through
Spring provides pretightning force, but is exported preload force mode by spring and limited, and it is that can not adjust to lead to the pretightning force that spring exports
Section, since bearing pre-fastening can not be adjusted, the thermal deformation of bearing also can not be just coped with by suitable pretightning force.Therefore,
At this stage using spring as pretightning force application component numerically control grinder electro spindle, the more high then machining accuracy of generally existing rotating speed more
Low situation, this seriously constrains the high speed development of numerically control grinder.
Invention content
In view of the problems of the existing technology, the present invention provides a kind of numerically control grinder for having self-adjustable bearing pretightning force
Electro spindle introduces bearing pre-fastening automatic regulation function, while using piezoelectric ceramics as pre- in numerically control grinder electro spindle for the first time
Clamp force output block can export according to the temperature adjust automatically pretightning force of bearing, bearings precision be effectively ensured, for number
The high speed development of control grinding machine provides powerful guarantee, while for the Wen Sheng for further reducing bearing, also optimize electro spindle
Cooling and lubrication system.
To achieve these goals, the present invention adopts the following technical scheme that：It is a kind of to have self-adjustable bearing pretightning force
Numerically control grinder electro spindle, including main shaft, housing, upper end cover, bottom end cover, rotor coil and stator coil；The rotor coil is consolidated
Surely it is sleeved in the middle part of main shaft, the stator coil is fixedly mounted on shell inner surface, and is added between stator coil and housing
First cooling jacket, the housing outer surface of axial positions adds the second cooling jacket where the first cooling jacket；Institute
It states and the first spiral cooling water channel is provided in the first cooling jacket, the first spiral cooling water channel water inlet and the first spiral cooling water
Road water outlet is arranged on housing；The second spiral cooling water channel is provided in second cooling jacket, the second spiral is cold
But water channel water inlet and the second spiral cooling water channel water outlet are set up directly on the second cooling jacket；In first spiral
Cooling water channel water inlet, the first spiral cooling water channel water outlet, the second spiral cooling water channel water inlet and the second spiral cooling water
Cooling water, which is mounted on, on road water outlet connects mouth；The upper end cover is packed in housing tip nozzle, and the bottom end cover is packed in shell
Body bottom end nozzle, and switching sleeve is added between bottom end cover and housing, the main shaft sequentially passes through switching sleeve and bottom end cover
And extend to hull outside；On main shaft between the bottom end cover and rotor coil, it is set with first jiao successively from the bottom to top
Contact ball bearing, clutch shaft bearing lubricating sleeve, the second angular contact ball bearing and bearing pre-fastening automatic adjusting mechanism, the first angular contact
The inner ring of ball bearing and the second angular contact ball bearing is connect with main shaft interference, the first angular contact ball bearing and the second angular contact ball axis
The outer ring held is connect by the first fixing sleeve of bearing outer ring with switching sleeve inner surface interference；The clutch shaft bearing lubricating sleeve and axis
Pretightning force automatic adjusting mechanism is held to connect with bearing outer ring the first fixing sleeve interference；On the main shaft above the rotor coil,
It is set with rotor clamp nut, third angular contact ball bearing, second bearing lubricating sleeve, fourth angle contact ball axis successively from the bottom to top
It holding and main shaft axial direction stop nut, the inner ring of third angular contact ball bearing and fourth angle contact ball bearing is connect with main shaft interference,
The outer ring of third angular contact ball bearing and fourth angle contact ball bearing passes sequentially through the second fixing sleeve of bearing outer ring and linear bearing
It is slidably connected with main shaft；The second bearing lubricating sleeve is connect with bearing outer ring the second fixing sleeve interference；The main shaft axially limits
Position nut thread is connected in main shaft top.
The first oil leab is provided in first fixing sleeve of bearing outer ring, is provided in the switching sleeve
Two oil leabs, the oil outlet end of the first oil leab are communicated with clutch shaft bearing lubricating sleeve, the oil inlet end of the first oil leab and
The oil outlet end of two oil leabs communicates, and being equipped with the first lubricating oil in the oil inlet end of the second oil leab connects mouth.
Electro spindle Wiring port is separately installed on the upper end cover and the second lubricating oil connects mouth, in the bearing outer ring
Be provided with third oil leab in second fixing sleeve, the oil outlet end of third oil leab simultaneously with second bearing lubricating sleeve and straight line
Bearing communicates, and the oil inlet end of third oil leab connects mouth with the second lubricating oil and is connected.
Annular cooling water slot is additionally provided in first fixing sleeve of bearing outer ring, is set respectively on the switching sleeve
Annular cooling water slot inlet channel and annular cooling water slot water outlet water channel are equipped with, and annular cooling water slot inlet channel and annular are cold
But there is 180 ° of angle between sink water outlet water channel.
The bearing pre-fastening automatic adjusting mechanism includes piezoelectric ceramics column, piezoelectric ceramics column fixed seat, piezoelectric ceramics column
Radial positioning disk, force transmiting disk and temperature sensor, piezoelectric ceramics column fixed seat, piezoelectric ceramics column radial positioning disk and force transmiting disk are equal
Interference is connected on the first fixing sleeve of bearing outer ring；The piezoelectric ceramics column quantity is several, and several piezoelectric ceramics columns are made pottery in piezoelectricity
It is circumferentially uniformly arranged in porcelain knob fixed seat；Piezoelectric ceramics column location hole is offered on the piezoelectric ceramics column radial positioning disk,
Piezoelectric ceramics column is abutted against with force transmiting disk across piezoelectric ceramics column location hole and is contacted, and force transmiting disk abuts against contact in the second angular contact ball axis
On the outer ring held, the temperature sensor is mounted on force transmiting disk, the temperature number that piezoelectric ceramics column passes through temperature sensor feedback
According to adjustment axial elongation, the automatic adjustment of bearing pre-fastening is carried out by adjusting piezoelectric ceramics column axial elongation.
Beneficial effects of the present invention：
The numerically control grinder electro spindle for having self-adjustable bearing pretightning force of the present invention, for the first time in numerically control grinder electro spindle
Bearing pre-fastening automatic regulation function is introduced, while using piezoelectric ceramics as pretightning force output block, it can be according to the temperature of bearing
The output of adjust automatically pretightning force is spent, bearings precision has been effectively ensured, the high speed development for numerically control grinder provides strong
It ensures, while for the Wen Sheng for further reducing bearing, also optimizes cooling and the lubrication system of electro spindle.
Description of the drawings
Fig. 1 is a kind of numerically control grinder electric main shaft structure schematic diagram for having self-adjustable bearing pretightning force of the present invention；
Fig. 2 is I portions enlarged drawing in Fig. 1；
In figure, 1-main shaft, 2-housing, 3-upper end cover, 4-bottom end cover, 5-rotor coil, 6-stator coil, 7-
First cooling jacket, the 8-the second cooling jacket, the 9-the first spiral cooling water channel, the 10-the first spiral cooling water channel water inlet,
11-the first spiral cooling water channel water outlet, the 12-the second spiral cooling water channel, the 13-the second spiral cooling water channel water inlet,
14-the second spiral cooling water channel water outlet, 15-switching sleeve, the 16-the first angular contact ball bearing, 17-clutch shaft bearing lubrication
Set, the 18-the second angular contact ball bearing, 19-bearing pre-fastening automatic adjusting mechanism, the first fixing sleeve of 20-bearing outer ring,
21-rotor clamp nut, 22-third angular contact ball bearing, 23-second bearing lubricating sleeve, 24-fourth angle contact ball axis
It holds, 25-main shaft axial direction stop nut, the second fixing sleeve of 26-bearing outer ring, 27-linear bearing, the 28-the first oil leab,
29-the second oil leab, the 30-the first lubricating oil connect mouth, 31-electro spindle Wiring port, and the 32-the second lubricating oil connects mouth,
33-third oil leab, 34-annular cooling water slot, 35-annular cooling water slot inlet channel, 36-annular cooling water slot go out
Water water channel, 37-piezoelectric ceramics column, 38-piezoelectric ceramics column fixed seat, 39-piezoelectric ceramics column radial positioning disk, 40-power transmission
Disk, 41-temperature sensor 41.
Specific embodiment
The present invention is described in further detail in the following with reference to the drawings and specific embodiments.
As shown in Figure 1, 2, a kind of numerically control grinder electro spindle for having self-adjustable bearing pretightning force, including main shaft 1, housing
2nd, upper end cover 3, bottom end cover 4, rotor coil 5 and stator coil 6；The rotor coil 5 is fixedly set in 1 middle part of main shaft, described
Stator coil 6 is fixedly mounted on 2 inner surface of housing, and the first cooling jacket 7 is added between stator coil 6 and housing 2,
2 outer surface of housing of one cooling jacket, 7 place axial positions adds the second cooling jacket 8；In first cooling jacket 7
Inside it is provided with the first spiral cooling water channel 9, the first spiral cooling water channel water inlet 10 and the first spiral cooling water channel water outlet 11
It is arranged on housing 2；The second spiral cooling water channel 12, the second spiral cooling water are provided in second cooling jacket 8
Water inlet 13 and second spiral cooling water channel water outlet 14 in road is set up directly on the second cooling jacket 8；In first spiral shell
Revolve cooling water channel water inlet 10, the first spiral cooling water channel water outlet 11, the second spiral cooling water channel water inlet 13 and the second spiral shell
Cooling water, which is mounted on, on rotation cooling water channel water outlet 14 connects mouth；The upper end cover 3 is packed in 2 top nozzle of housing, under described
End cap 4 is packed in 2 bottom end nozzle of housing, and switching sleeve 15 is added between bottom end cover 4 and housing 2, and the main shaft 1 is worn successively
It crosses switching sleeve 15 and bottom end cover 4 and extends to 2 outside of housing；On main shaft 1 between the bottom end cover 4 and rotor coil 5,
It is set with the first angular contact ball bearing 16, clutch shaft bearing lubricating sleeve 17, the second angular contact ball bearing 18 and axis successively from the bottom to top
Hold pretightning force automatic adjusting mechanism 19, the first angular contact ball bearing 16 and the inner ring of the second angular contact ball bearing 18 and 1 mistake of main shaft
Be full of connection, the outer ring of the first angular contact ball bearing 16 and the second angular contact ball bearing 18 by the first fixing sleeve of bearing outer ring 20 with
15 inner surface interference of switching sleeve connects；The clutch shaft bearing lubricating sleeve 17 and bearing pre-fastening automatic adjusting mechanism 19 and bearing
20 interference of the first fixing sleeve of outer ring connects；On the main shaft 1 above the rotor coil 5, it is set with rotor successively from the bottom to top
Clamp nut 21, third angular contact ball bearing 22, second bearing lubricating sleeve 23, fourth angle contact ball bearing 24 and main shaft axially limit
The inner ring of position nut 25, third angular contact ball bearing 22 and fourth angle contact ball bearing 24 is connect with 1 interference of main shaft, third corner connection
The outer ring for touching ball bearing 22 and fourth angle contact ball bearing 24 passes sequentially through the second fixing sleeve of bearing outer ring 26 and linear bearing 27
It is slidably connected with main shaft 1；The second bearing lubricating sleeve 23 is connect with 26 interference of the second fixing sleeve of bearing outer ring；The spindle shaft
1 top of main shaft is connected in 25 screw thread of stop nut.
The first oil leab 28 is provided in first fixing sleeve of bearing outer ring 20, is set in the switching sleeve 15
The second oil leab 29 is equipped with, the oil outlet end of the first oil leab 28 is communicated with clutch shaft bearing lubricating sleeve 17, the first oil leab
28 oil inlet end is communicated with the oil outlet end of the second oil leab 29, and the first lubrication is equipped in the oil inlet end of the second oil leab 29
Oil connects mouth 30.
31 and second lubricating oil of electro spindle Wiring port is separately installed on the upper end cover 3 and connects mouth 32, in the axis
Third oil leab 33, the oil outlet end of third oil leab 33 while and second bearing are provided in the second fixing sleeve of bearing outer-ring 26
Lubricating sleeve 23 and linear bearing 27 communicate, and the oil inlet end of third oil leab 33 connects mouth 32 with the second lubricating oil and is connected.
Annular cooling water slot 34 is additionally provided in first fixing sleeve of bearing outer ring 20, on the switching sleeve 15
It is respectively arranged with annular cooling water slot inlet channel 35 and annular cooling water slot water outlet water channel 36, and annular cooling water slot water inlet water
There is 180 ° of angle between road 35 and annular cooling water slot water outlet water channel 36.
The bearing pre-fastening automatic adjusting mechanism 19 includes piezoelectric ceramics column 37, piezoelectric ceramics column fixed seat 38, piezoelectricity
Ceramics pole radial positioning disk 39, force transmiting disk 40 and temperature sensor 41, piezoelectric ceramics column fixed seat 38, piezoelectric ceramics column are radially fixed
Position disk 39 and 40 equal interference of force transmiting disk are connected on the first fixing sleeve of bearing outer ring 20；37 quantity of piezoelectric ceramics column is several,
Several piezoelectric ceramics columns 37 are circumferentially uniformly arranged in piezoelectric ceramics column fixed seat 38；In the piezoelectric ceramics column radial positioning disk
Piezoelectric ceramics column location hole is offered on 39, piezoelectric ceramics column 37 is abutted against with force transmiting disk 40 across piezoelectric ceramics column location hole and connect
It touches, force transmiting disk 40 abuts against contact on the outer ring of the second angular contact ball bearing 18, and the temperature sensor 41 is mounted on force transmiting disk
On 40, piezoelectric ceramics column 37 adjusts axial elongation by the temperature data that temperature sensor 41 is fed back, and makes pottery by adjusting piezoelectricity
37 axial elongation of porcelain knob carries out the automatic adjustment of bearing pre-fastening.
In numerically control grinder operational process, temperature factor is to influence the primary factor of machining accuracy, in order to reduce numerical control grinding
The fever behavior of bed electro spindle, the present invention have been specifically designed double water-cooling structures for rotor loss fever, have passed through the first cooling
7 and second cooling jacket 8 of water jacket quickly generates heat with the loss of rotor, effectively reduces the temperature of rotor, fixed so as to reduce
The harmful effect that the fever high temperature of rotor generates main shaft 1 and bearing.In addition, in addition to rotor be lost generate heat this influence because
Element, also the bearing frictional heating of itself, the present invention are directed to simultaneously for the also individually designed water-cooling structure of bearing friction fever
All bearings devise lubrication system, are aided with water-cooling while bearing friction degree is reduced, utmostly limit
The frictional heating of bearing.
Above-mentioned means are all quick raised for preventing bearing temperature from occurring, and utmostly alleviate the thermal deformation of bearing,
But continue to improve with rotating speed, the effect for alleviating bearing thermal deformation can be played by way of water-cooling and bearing lubrication
It can continuously decrease, at this time in order to ensure the grinding machine machining accuracy under high-speed state, bearing pre-fastening of the invention automatically adjusts
Mechanism 19 will gradually work.With the raising of rotating speed, the cooling rate of water-cooling and bearing lubrication has been unable to catch up with bearing
Heating rate then needs to offset bearing thermal deformation adverse effect by suitable bearing pre-fastening at this time, first
Bearing temperature is monitored, and will real-time monitor by the temperature sensor 41 in bearing pre-fastening automatic adjusting mechanism 19 in real time
Bearing temperature data feedback to numerical control system of grinding machine, then by numerical control system of grinding machine export control signal, make piezoelectric ceramics column
37 elongation changes, and to generate suitable bearing pre-fastening, utmostly reduces because bearing thermal deformation is to processing essence
The influence generated is spent, so as to ensure that the basicly stable of bearings precision, the final high speed development for numerically control grinder provides
Powerful guarantee.
Scheme in embodiment is not the scope of patent protection to limit the present invention, it is all without departing from carried out by the present invention etc.
Effect implements or change, is both contained in the scope of the claims of this case.
Claims (5)
1. a kind of numerically control grinder electro spindle for having self-adjustable bearing pretightning force, it is characterised in that：Including main shaft, housing, on
End cap, bottom end cover, rotor coil and stator coil；The rotor coil is fixedly set in the middle part of main shaft, and the stator coil is consolidated
Dingan County is mounted in shell inner surface, and the first cooling jacket is added between stator coil and housing, where the first cooling jacket
The housing outer surface of axial positions adds the second cooling jacket；It is cold that the first spiral is provided in first cooling jacket
But water channel, the first spiral cooling water channel water inlet and the first spiral cooling water channel water outlet are arranged on housing；Described
The second spiral cooling water channel is provided in two cooling jackets, the second spiral cooling water channel water inlet and the second spiral cooling water are said
The mouth of a river is set up directly on the second cooling jacket；In the first spiral cooling water channel water inlet, the first spiral cooling water channel
Cooling water, which is mounted on, on water outlet, the second spiral cooling water channel water inlet and the second spiral cooling water channel water outlet connects mouth；Institute
It states upper end cover and is packed in housing tip nozzle, the bottom end cover is packed in housing bottom end nozzle, and adds between bottom end cover and housing
Equipped with switching sleeve, the main shaft sequentially passes through switching sleeve and bottom end cover and extends to hull outside；The bottom end cover with
On main shaft between rotor coil, be set with successively from the bottom to top the first angular contact ball bearing, clutch shaft bearing lubricating sleeve, second jiao
The inner ring of contact ball bearing and bearing pre-fastening automatic adjusting mechanism, the first angular contact ball bearing and the second angular contact ball bearing with
Main shaft interference connects, the outer ring of the first angular contact ball bearing and the second angular contact ball bearing by the first fixing sleeve of bearing outer ring with
The interference of switching sleeve inner surface connects；The clutch shaft bearing lubricating sleeve and bearing pre-fastening automatic adjusting mechanism and bearing outer ring the
One fixing sleeve interference connects；On the main shaft above the rotor coil, it is set with rotor clamp nut, successively from the bottom to top
Triangle contact ball bearing, second bearing lubricating sleeve, fourth angle contact ball bearing and main shaft axial direction stop nut, third angular contact ball
The inner ring of bearing and fourth angle contact ball bearing is connect with main shaft interference, third angular contact ball bearing and fourth angle contact ball bearing
Outer ring pass sequentially through the second fixing sleeve of bearing outer ring and linear bearing is slidably connected with main shaft；The second bearing lubricating sleeve with
The interference of the second fixing sleeve of bearing outer ring connects；The main shaft axial direction stop nut screw thread is connected in main shaft top.
2. a kind of numerically control grinder electro spindle for having self-adjustable bearing pretightning force according to claim 1, feature exist
In：The first oil leab is provided in first fixing sleeve of bearing outer ring, the second profit is provided in the switching sleeve
Grease way, the oil outlet end of the first oil leab are communicated with clutch shaft bearing lubricating sleeve, the oil inlet end of the first oil leab and the second profit
The oil outlet end of grease way communicates, and being equipped with the first lubricating oil in the oil inlet end of the second oil leab connects mouth.
3. a kind of numerically control grinder electro spindle for having self-adjustable bearing pretightning force according to claim 1, feature exist
In：Electro spindle Wiring port is separately installed on the upper end cover and the second lubricating oil connects mouth, in the bearing outer ring second
Be provided with third oil leab in fixing sleeve, the oil outlet end of third oil leab simultaneously with second bearing lubricating sleeve and linear bearing
It communicates, the oil inlet end of third oil leab connects mouth with the second lubricating oil and is connected.
4. a kind of numerically control grinder electro spindle for having self-adjustable bearing pretightning force according to claim 1, feature exist
In：Annular cooling water slot is additionally provided in first fixing sleeve of bearing outer ring, is respectively arranged on the switching sleeve
Annular cooling water slot inlet channel and annular cooling water slot water outlet water channel, and annular cooling water slot inlet channel and annular cooling water
There is 180 ° of angle between slot water outlet water channel.
5. a kind of numerically control grinder electro spindle for having self-adjustable bearing pretightning force according to claim 1, feature exist
In：It is radially fixed that the bearing pre-fastening automatic adjusting mechanism includes piezoelectric ceramics column, piezoelectric ceramics column fixed seat, piezoelectric ceramics column
Position disk, force transmiting disk and temperature sensor, piezoelectric ceramics column fixed seat, piezoelectric ceramics column radial positioning disk and the equal interference of force transmiting disk connect
It is connected on the first fixing sleeve of bearing outer ring；The piezoelectric ceramics column quantity is several, and several piezoelectric ceramics columns are consolidated in piezoelectric ceramics column
It is circumferentially uniformly arranged in reservation；Piezoelectric ceramics column location hole, piezoelectricity pottery are offered on the piezoelectric ceramics column radial positioning disk
Porcelain knob is abutted against with force transmiting disk across piezoelectric ceramics column location hole and is contacted, and force transmiting disk abuts against contact in the outer of the second angular contact ball bearing
On circle, the temperature sensor is mounted on force transmiting disk, and piezoelectric ceramics column is adjusted by the temperature data of temperature sensor feedback
Axial elongation carries out the automatic adjustment of bearing pre-fastening by adjusting piezoelectric ceramics column axial elongation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810209237.9A CN108247535A (en) | 2018-03-14 | 2018-03-14 | A kind of numerically control grinder electro spindle for having self-adjustable bearing pretightning force |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810209237.9A CN108247535A (en) | 2018-03-14 | 2018-03-14 | A kind of numerically control grinder electro spindle for having self-adjustable bearing pretightning force |
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| CN108247535A true CN108247535A (en) | 2018-07-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810209237.9A Pending CN108247535A (en) | 2018-03-14 | 2018-03-14 | A kind of numerically control grinder electro spindle for having self-adjustable bearing pretightning force |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109202138A (en) * | 2018-11-20 | 2019-01-15 | 陕西海力特精密机械有限公司 | The double knife numerically-controlled machine tool of the double main shafts of oblique lathe bed of main shaft docking processing can be achieved |
| CN113618094A (en) * | 2021-07-05 | 2021-11-09 | 玉环澳玛数控科技有限公司 | High-speed low-temperature electric spindle of numerical control lathe |
| CN116493618A (en) * | 2023-06-28 | 2023-07-28 | 深圳市速锋科技股份有限公司 | Intelligent motorized spindle system of numerical control machine tool |
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