CN208005457U - A kind of numerically control grinder electro spindle having self-adjustable bearing pretightning force - Google Patents
A kind of numerically control grinder electro spindle having self-adjustable bearing pretightning force Download PDFInfo
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- CN208005457U CN208005457U CN201820349920.8U CN201820349920U CN208005457U CN 208005457 U CN208005457 U CN 208005457U CN 201820349920 U CN201820349920 U CN 201820349920U CN 208005457 U CN208005457 U CN 208005457U
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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 54
- 239000000919 ceramic Substances 0.000 claims abstract description 45
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 35
- 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 4
- 239000004519 grease Substances 0.000 claims 2
- 239000007787 solid Substances 0.000 claims 2
- 206010037660 Pyrexia Diseases 0.000 abstract description 6
- 230000007423 decrease Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 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
- 230000033228 biological regulation Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000036316 preload 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
- 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
- 230000008569 process Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
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- Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
Abstract
A kind of numerically control grinder electro spindle having self-adjustable bearing pretightning force, rotor loss fever for electro spindle devises double water-cooling structures, the high efficiency and heat radiation that rotor is realized by two layers of cooling jacket inside and outside shell, 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, so that the elongation of piezoelectric ceramics column is changed, to generate suitable bearing pre-fastening.
Description
Technical field
The utility model belongs to electrical spindle for machine tool technical field, having self-adjustable bearing pretightning force more particularly to one kind
Numerically control grinder electro spindle.
Background technology
Recent years, more and more numerically control grinders used 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,
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 bearing support 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 use 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.
Utility model content
In view of the problems of the existing technology, the utility model provides a kind of numerical control having self-adjustable bearing pretightning force
Grinder Spindle introduces bearing pre-fastening automatic regulation function in numerically control grinder electro spindle, while piezoelectric ceramics being made for the first time
For pretightning force output block, it can be exported according to the temperature adjust automatically pretightning force of bearing, bearing support precision has been effectively ensured,
Powerful guarantee is provided for the high speed development of numerically control grinder, while in order to further decrease the Wen Sheng of bearing, also optimizing electricity
The cooling of main shaft and lubrication system.
To achieve the goals above, the utility model adopts the following technical solution：One kind having self-adjustable bearing preload
The numerically control grinder electro spindle of power, including main shaft, shell, upper end cover, bottom end cover, rotor coil and stator coil；The rotor line
Circle is fixedly set in the middle part of main shaft, and the stator coil is fixedly mounted on shell inner surface, and adds between stator coil and shell
Equipped with the first cooling jacket, the second cooling jacket is added in the housing outer surface of axial positions where the first cooling jacket；
The first spiral cooling water channel is provided in first cooling jacket, the first spiral cooling water channel water inlet and the first spiral are cold
But water channel water outlet is arranged on shell；The second spiral cooling water channel, the second spiral shell are provided in second cooling jacket
Rotation cooling water channel water inlet and the second spiral cooling water channel water outlet are set up directly on the second cooling jacket；Described 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 are cold
But it is mounted on cooling water on water channel water outlet and connects mouth；The upper end cover is packed in housing tip nozzle, and the bottom end cover is fixedly mounted with
In shell bottom end nozzle, and switching sleeve is added between bottom end cover and shell, the main shaft sequentially pass through switching sleeve and under
End cap simultaneously extends to hull outside；On main shaft between the bottom end cover and rotor coil, it is set with successively from the bottom to top
One angular contact ball bearing, first bearing lubricating sleeve, the second angular contact ball bearing and bearing pre-fastening automatic adjusting mechanism, first jiao
The inner ring of contact 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
The outer ring of ball bearing is connect by the first fixing sleeve of bearing outer ring with switching sleeve inner surface interference；The first bearing lubricating sleeve
And bearing pre-fastening automatic adjusting mechanism is connect with bearing outer ring the first fixing sleeve interference；Main shaft above the rotor coil
On, it is set with rotor fastening nut, third angular contact ball bearing, second bearing lubricating sleeve, fourth angle contact successively from the bottom to top
The inner ring of ball bearing and main shaft axial direction stop nut, third angular contact ball bearing and fourth angle contact ball bearing connects with main shaft interference
It connects, 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 axis
It holds and 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 is axial
Stop nut screw thread is connected in main shaft top.
It is provided with the first oil leab in the first fixing sleeve of the bearing outer ring, is provided in the switching sleeve
The oil outlet end of two oil leabs, the first oil leab is communicated with first 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.
It is separately installed with electro spindle Wiring port 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.
It is additionally provided with annular cooling water slot in the first fixing sleeve of the bearing outer ring, is set respectively on the switching sleeve
It is equipped with annular cooling water slot inlet channel and annular cooling water slot water outlet water channel, and annular cooling water slot inlet channel and annular are cold
But with 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.
The beneficial effects of the utility model：
The numerically control grinder electro spindle for having self-adjustable bearing pretightning force of the utility model, for the first time in numerically control grinder electricity master
Bearing pre-fastening automatic regulation function is introduced in axis, while using piezoelectric ceramics as pretightning force output block, it can be according to bearing
Temperature adjust automatically pretightning force output, bearing support precision has been effectively ensured, for numerically control grinder high speed develop provide
Powerful guarantee, while in order to further decrease the Wen Sheng of bearing, also optimizing 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 signal having self-adjustable bearing pretightning force of the utility model
Figure；
Fig. 2 is the portions I enlarged drawing in Fig. 1；
In figure, 1-main shaft, 2-shells, 3-upper end covers, 4-bottom end covers, 5-rotor coils, 6-stator coils, 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 sleeves, the 16-the first angular contact ball bearing, 17-first bearings lubrication
Set, the 18-the second angular contact ball bearing, 19-bearing pre-fastening automatic adjusting mechanisms, 20-the first fixing sleeves of bearing outer ring,
21-rotor fastening nuts, 22-third angular contact ball bearings, 23-second bearing lubricating sleeves, 24-fourth angles contact ball axis
It holds, 25-main shaft axial direction stop nuts, 26-the second fixing sleeves of bearing outer ring, 27-linear bearings, the 28-the first oil leab,
29-the second oil leab, the 30-the first lubricating oil connect mouth, 31-electro spindle Wiring ports, and the 32-the second lubricating oil connects mouth,
33-third oil leabs, 34-annular cooling water slots, 35-annular cooling water slot inlet channels, 36-annular cooling water slots go out
Water water channel, 37-piezoelectric ceramics columns, 38-piezoelectric ceramics column fixed seats, 39-piezoelectric ceramics column radial positioning disks, 40-power transmissions
Disk, 41-temperature sensors 41.
Specific implementation mode
The utility model 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 having self-adjustable bearing pretightning force, including main shaft 1, shell
2, 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 shell, and the first cooling jacket 7 is added between stator coil 6 and shell 2,
2 outer surface of shell 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 shell 2；The second spiral cooling water channel 12, the second spiral cooling water are provided in second cooling jacket 8
Road water inlet 13 and the second spiral cooling water channel water outlet 14 are 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
It is mounted on cooling water on rotation cooling water channel water outlet 14 and connects mouth；The upper end cover 3 is packed in 2 top nozzle of shell, under described
End cap 4 is packed in 2 bottom end nozzle of shell, and switching sleeve 15 is added between bottom end cover 4 and shell 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 shell；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, first bearing lubricating sleeve 17, the second angular contact ball bearing 18 and axis successively from the bottom to top
Hold the inner ring and 1 mistake of main shaft of pretightning force automatic adjusting mechanism 19, the first angular contact ball bearing 16 and the second angular contact ball bearing 18
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 first 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 main shaft 1 above the rotor coil 5, it is set with rotor successively from the bottom to top
Fastening 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
It is connected in 1 top of main shaft to 25 screw thread of stop nut.
It is provided with the first oil leab 28 in the first fixing sleeve of the bearing outer ring 20, is set in the switching sleeve 15
It is equipped with the second oil leab 29, the oil outlet end of the first oil leab 28 is communicated with first 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.
It is separately installed with electro spindle Wiring port 31 on the upper end cover 3 and the second lubricating oil 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.
It is additionally provided with annular cooling water slot 34 in the first fixing sleeve of the 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
With 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 utility model have been specifically designed double water-cooling structures for rotor loss fever, have passed through first
Cooling jacket 7 and the second cooling jacket 8 quickly generate heat with the loss of rotor, the temperature of rotor are effectively reduced, to drop
The harmful effect that the fever high temperature of low rotor generates main shaft 1 and bearing.In addition, in addition to this influence of generating heat is lost in rotor
Factor, also the bearing frictional heating of itself, the utility model is for the also individually designed water-cooling structure of bearing friction fever, together
When for all bearings devise lubrication system, be aided with water-cooling while reducing bearing friction degree, utmostly
Limit the frictional heating of bearing.
Above-mentioned means are all quickly raised for preventing bearing temperature from occurring, and utmostly alleviate the thermal deformation of bearing,
But continues 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 that the grinding machine machining accuracy under high-speed state, the bearing pre-fastening of the utility model are automatic
Regulating 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 axis
The heating rate held then needs to offset bearing thermal deformation adverse effect by suitable bearing pre-fastening at this time,
Bearing temperature is monitored in real time by the temperature sensor 41 in bearing pre-fastening automatic adjusting mechanism 19 first, and will be supervised in real time
The bearing temperature data feedback measured exports control signal to numerical control system of grinding machine, then by numerical control system of grinding machine, and piezoelectricity is made to make pottery
The elongation of porcelain knob 37 changes, and to generate suitable bearing pre-fastening, utmostly reduces because bearing thermal deformation pair adds
The influence that work precision generates, to ensure that the basicly stable of bearing support precision, the final high speed for numerically control grinder develops
Provide powerful guarantee.
Scheme in embodiment is all without departing from the utility model not to limit the scope of patent protection of the utility model
Carried out by equivalence enforcement or change, be both contained in the scope of the claims of this case.
Claims (5)
1. a kind of numerically control grinder electro spindle having self-adjustable bearing pretightning force, it is characterised in that：Including main shaft, shell, 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 solid
Dingan County is mounted in shell inner surface, and the first cooling jacket is added between stator coil and shell, where the first cooling jacket
The housing outer surface of axial positions adds the second cooling jacket；It is cold it to be provided with the first spiral 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 shell；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
It is mounted on cooling water on water outlet, the second spiral cooling water channel water inlet and the second spiral cooling water channel water outlet and connects mouth；Institute
It states upper end cover and is packed in housing tip nozzle, the bottom end cover is packed in shell bottom end nozzle, and adds between bottom end cover and shell
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, first 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
Switching sleeve inner surface interference connects；The first 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 fastening 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
Bearing outer ring the second fixing sleeve interference 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 having self-adjustable bearing pretightning force according to claim 1, feature exist
In：It is provided with the first oil leab in the first fixing sleeve of the bearing outer ring, the second profit is provided in the switching sleeve
The oil outlet end of grease way, the first oil leab is communicated with first 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 having self-adjustable bearing pretightning force according to claim 1, feature exist
In：It is separately installed with electro spindle Wiring port 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 having self-adjustable bearing pretightning force according to claim 1, feature exist
In：It is additionally provided with annular cooling water slot in the first fixing sleeve of the bearing outer ring, is respectively arranged on the switching sleeve
Annular cooling water slot inlet channel and annular cooling water slot are discharged water channel, and annular cooling water slot inlet channel and annular cooling water
Slot is discharged between water channel with 180 ° of angle.
5. a kind of numerically control grinder electro spindle having self-adjustable bearing pretightning force according to claim 1, feature exist
In：The bearing pre-fastening automatic adjusting mechanism, which includes piezoelectric ceramics column, piezoelectric ceramics column fixed seat, piezoelectric ceramics column is radial determines
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 solid 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 |
|---|---|---|---|
| CN201820349920.8U CN208005457U (en) | 2018-03-14 | 2018-03-14 | A kind of numerically control grinder electro spindle having self-adjustable bearing pretightning force |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820349920.8U CN208005457U (en) | 2018-03-14 | 2018-03-14 | A kind of numerically control grinder electro spindle having self-adjustable bearing pretightning force |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208005457U true CN208005457U (en) | 2018-10-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820349920.8U Expired - Fee Related CN208005457U (en) | 2018-03-14 | 2018-03-14 | A kind of numerically control grinder electro spindle having self-adjustable bearing pretightning force |
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| CN (1) | CN208005457U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108247535A (en) * | 2018-03-14 | 2018-07-06 | 沈阳建筑大学 | A kind of numerically control grinder electro spindle for having self-adjustable bearing pretightning force |
-
2018
- 2018-03-14 CN CN201820349920.8U patent/CN208005457U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108247535A (en) * | 2018-03-14 | 2018-07-06 | 沈阳建筑大学 | A kind of numerically control grinder electro spindle for having self-adjustable bearing pretightning force |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181026 |