CN208214352U - A kind of machining center ultrasonic wave electro spindle having self-adjustable bearing pretightning force - Google Patents
A kind of machining center ultrasonic wave electro spindle having self-adjustable bearing pretightning force Download PDFInfo
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- CN208214352U CN208214352U CN201820350370.1U CN201820350370U CN208214352U CN 208214352 U CN208214352 U CN 208214352U CN 201820350370 U CN201820350370 U CN 201820350370U CN 208214352 U CN208214352 U CN 208214352U
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- 239000000498 cooling water Substances 0.000 claims abstract description 55
- 239000000919 ceramic Substances 0.000 claims abstract description 45
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 39
- 238000001816 cooling Methods 0.000 claims abstract description 35
- 230000007246 mechanism Effects 0.000 claims abstract description 20
- 230000001050 lubricating effect Effects 0.000 claims abstract description 17
- 239000003921 oil Substances 0.000 claims description 64
- 239000010687 lubricating oil Substances 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 claims description 5
- 229910052573 porcelain Inorganic materials 0.000 claims description 4
- 230000002035 prolonged effect Effects 0.000 claims 1
- 239000007787 solid Substances 0.000 claims 1
- 206010037660 Pyrexia Diseases 0.000 abstract description 6
- 230000007423 decrease Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 4
- 238000012544 monitoring process Methods 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 6
- 238000000034 method Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000036316 preload Effects 0.000 description 2
- 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
- 239000004519 grease Substances 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
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Abstract
A kind of machining center ultrasonic wave 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, reduce bearing thermal deformation；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, pass through the temperature sensor real-time monitoring bearing temperature of bearing pre-fastening automatic adjusting mechanism first, and by the bearing temperature data feedback monitored to machine tool numerical control system, control signal is exported by machine tool numerical control system 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, has self-adjustable bearing pretightning force more particularly to one kind
Machining center ultrasonic wave electro spindle.
Background technique
More and more machining centers recent years use ultrasonic wave electro spindle, and ultrasonic wave electro spindle not only has structure
Compact, light-weight, the advantages that inertia is small, noise is low, response is fast, revolving speed is high and power is big, and can use ultrasonic wave progress
Secondary process.Electro spindle is the new technology that machine tool chief axis and spindle drive motor combine together, and this by machine tool chief axis and master
The drive mechanism form of axis motor " being combined into one " effectively makes spindle unit phase from the transmission system and overall structure of lathe
To independent, and machine tool chief axis is then directly driven by built-in motor, so that the length of Machine Tool Main Drive chain is shorten to
Zero, realize " Zero-drive Chain " of lathe.
Since the machining accuracy of lathe directly determines the Precision Machining quality of part, while the running precision of electro spindle is again
The machining accuracy of lathe is directly affected, therefore, it is desirable to guarantee 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, also will affect electro spindle axis
The Oscillation Amplitude at end, with the variation of processing operating condition, 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 the pretightning force for causing spring to export is can not to adjust
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,
Apply the machining center ultrasonic wave electro spindle of component as pretightning force using spring at this stage, the generally existing revolving speed the high, processes
The lower situation of precision, this seriously constrains the high speed development of machining center.
Utility model content
In view of the problems of the existing technology, the utility model provides a kind of processing for having self-adjustable bearing pretightning force
Center ultrasonic wave electro spindle introduces bearing pre-fastening automatic regulation function, simultaneously in machining center for the first time in ultrasonic wave electro spindle
Using piezoelectric ceramics as pretightning force output block, it can be exported, be effectively ensured according to the temperature adjust automatically pretightning force of bearing
Bearing support precision provides powerful guarantee for the high speed development of machining center, while in order to further decrease the temperature of bearing
It rises, also optimizes cooling and the lubrication system of electro spindle.
To achieve the goals above, the utility model adopts the following technical solution: one kind having self-adjustable bearing preload
The machining center ultrasonic wave electro spindle of power, including main shaft, shell, upper end cover, lower cover, rotor coil, stator coil；Described turn
Subcoil is fixedly set in the middle part of main shaft, and the stator coil is fixedly mounted on shell inner surface, and stator coil and shell it
Between add the first cooling jacket, add the second cooling water in the housing outer surface of axial positions where the first cooling jacket
Set；The first spiral cooling water channel, the first spiral cooling water channel water inlet and the first spiral shell are provided in first cooling jacket
Rotation cooling water channel water outlet is arranged on shell；The second spiral cooling water channel is provided in second cooling jacket, the
Two spiral cooling water channel water inlets 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 shell
Cooling water, which is mounted on, on rotation cooling water channel water outlet connects mouth；The upper end cover is packed in housing tip nozzle, the lower cover
It is packed in housing bottom nozzle, and adds switching sleeve between lower cover and shell, the main shaft sequentially passes through switching sleeve
And lower cover and extend to hull outside；On main shaft between the lower cover and rotor coil, successively it is set with from the bottom to top
There are the first angular contact ball bearing, first bearing lubricating sleeve and the second angular contact ball bearing, the first angular contact ball bearing and second jiao
The inner ring of contact ball bearing is connect with main shaft interference, and the outer ring of the first angular contact ball bearing and the second angular contact ball bearing passes through axis
The first fixing sleeve of bearing outer-ring is connect with switching sleeve inner surface interference；On the main shaft above the rotor coil, from the bottom to top
Successively it is set with rotor fastening nut, third angular contact ball bearing, second bearing lubricating sleeve, fourth angle contact ball bearing, bearing
Pretightning force automatic adjusting mechanism and bearing axial limiting nut, the inner ring of third angular contact ball bearing and fourth angle contact ball bearing
It is connect with main shaft interference, the outer ring of third angular contact ball bearing and fourth angle contact ball bearing passes through the second fixing sleeve of bearing outer ring
It is connect with shell interference, the second bearing lubricating sleeve and bearing pre-fastening automatic adjusting mechanism and the second fixing sleeve of bearing outer ring
Interference connection；The bearing axial limiting nut is threadedly coupled with the second fixing sleeve of bearing outer ring；The main shaft is hollow shaft,
Pull rod is equipped in the centre bore of main shaft, the upper aperture of main shaft is extended on pull rod top, is equipped with pull rod on pull rod top and is axially limited
Position nut, is set with disc spring on main shaft top, power transmission casing is provided between pull rod axial direction stop nut and disc spring；In the drawing
Upper end cover lower surface right above bar is equipped with hydraulic cylinder, the piston rod of hydraulic cylinder downward, and the piston rod and pull rod of hydraulic cylinder
The setting of top face；Supersonic generator, amplitude transformer and knife handle retaining mechanism, knife handle lock are successively fixed in the pull rod bottom end
Tight mechanism is used cooperatively with knife handle.
It is provided with the first oil leab in first fixing sleeve of bearing outer ring, is provided in the switching sleeve
The oil outlet 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 of two oil leabs communicates, and is equipped with the first lubricating oil in the oil inlet end of the second oil leab and connects mouth.
Electro spindle Wiring port is installed on the upper end cover；Is provided in second fixing sleeve of bearing outer ring
The oil outlet of three oil leabs, third oil leab is communicated with second bearing lubricating sleeve, offers the 4th profit on the housing
Grease way, the oil inlet end of third oil leab are communicated with the oil outlet of the 4th oil leab, the oil inlet end peace of the 4th oil leab
Mouth is connect equipped with the second lubricating oil.
It is additionally provided with annular cooling water slot in first fixing sleeve of 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 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 fixing seat, piezoelectric ceramics column
Radial positioning disk, the first force transmiting disk, spring, the second force transmiting disk and temperature sensor；Piezoelectric ceramics column fixing seat, piezoelectric ceramics column
Radial positioning disk, the first force transmiting disk and the equal interference of the second force transmiting disk are connected on the second fixing sleeve of bearing outer ring；The piezoelectricity pottery
Porcelain knob quantity is several, and several piezoelectric ceramics columns are circumferentially uniformly arranged in piezoelectric ceramics column fixing seat；In the piezoelectric ceramics column
Piezoelectric ceramics column location hole is offered on radial positioning disk, piezoelectric ceramics column passes through piezoelectric ceramics column location hole and the first force transmiting disk
Abut against contact；The spring is connected between the first force transmiting disk and the second force transmiting disk, and the second force transmiting disk abuts against contact in fourth angle
On the outer ring of contact ball bearing；The number of springs is several, and several springs are circumferential between the first force transmiting disk and the second force transmiting disk
It is uniformly arranged；The temperature sensor is mounted on the second force transmiting disk, the temperature that piezoelectric ceramics column is fed back by temperature sensor
Data point reuse axial elongation carries out the automatic adjustment of bearing pre-fastening by adjusting piezoelectric ceramics column axial elongation.
The utility model has the beneficial effects that
The machining center ultrasonic wave electro spindle for having self-adjustable bearing pretightning force of the utility model, for the first time work in-process
Bearing pre-fastening automatic regulation function is introduced in heart ultrasonic wave electro spindle, while using piezoelectric ceramics as 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, be the high speed of machining center
Change development and provide powerful guarantee, while in order to further decrease the temperature rise of bearing, also optimizing the cooling and lubrication of electro spindle
Structure.
Detailed description of the invention
Fig. 1 is a kind of machining center ultrasonic wave electric main shaft structure for having self-adjustable bearing pretightning force of the utility model
Schematic diagram；
Fig. 2 is the portion I enlarged drawing in Fig. 1；
In figure, 1-main shaft, 2-shells, 3-upper end covers, 4-lower 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-bearing axial limiting nuts, 26-the second fixing sleeves of bearing outer ring, 27-pull rods, 28-pull rod axial direction stop nuts,
29-disc springs, 30-power transmission casings, 31-hydraulic cylinders, 32-supersonic generators, 33-amplitude transformers, 34-knife handles lock machine
Structure, 35-knife handles, the 36-the first oil leab, the 37-the second oil leab, the 38-the first lubricating oil connect mouth, and 39-electro spindles connect
Line end mouth, 40-third oil leabs, the 41-the four oil leab, the 42-the second lubricating oil connect mouth, 43-annular cooling water slots,
44-annular cooling water slot inlet channels, 45-annular cooling water slots are discharged water channel, 46-piezoelectric ceramics columns, 47-piezoelectric ceramics
Column fixing seat, 48-piezoelectric ceramics column radial positioning disks, the 49-the first force transmiting disk, 50-springs, the 51-the second force transmiting disk, 52-
Temperature sensor.
Specific embodiment
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 machining center ultrasonic wave electro spindle having self-adjustable bearing pretightning force, including main shaft
1, shell 2, upper end cover 3, lower cover 4, rotor coil 5, stator coil 6；The rotor coil 5 is fixedly set in 1 middle part of main shaft,
The 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,
The second cooling jacket 8 is added in 2 outer surface of shell of 7 place axial positions of the first cooling jacket；It is cooling described first
The first spiral cooling water channel 9, the first spiral cooling water channel water inlet 10 and the water outlet of the first spiral cooling water channel are provided in water jacket 7
Mouth 11 is arranged on shell 2；The second spiral cooling water channel 12 is provided in second cooling jacket 8, the second spiral is cold
But water channel water inlet 13 and the second spiral cooling water channel water outlet 14 are set up directly on the second cooling jacket 8；Described
One spiral 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
Cooling water, which is mounted on, on two spiral cooling water channel water outlets 14 connects mouth；The upper end cover 3 is packed in 2 top nozzle of shell, institute
State lower cover 4 and be packed in 2 bottom end nozzle of shell, and add switching sleeve 15 between lower cover 4 and shell 2, the main shaft 1 according to
It is secondary to pass through switching sleeve 15 and lower cover 4 and extend to 2 outside of shell；Main shaft between the lower cover 4 and rotor coil 5
On 1, it is successively set with the first angular contact ball bearing 16, first bearing lubricating sleeve 17 and the second angular contact ball bearing from the bottom to top
18, the inner ring of the first angular contact ball bearing 16 and the second angular contact ball bearing 18 is connect with 1 interference of main shaft, the first angular contact ball axis
Hold 16 and second the outer ring of angular contact ball bearing 18 pass through the first fixing sleeve of bearing outer ring 20 and 15 inner surface interference of switching sleeve
Connection；On the main shaft 1 above the rotor coil 5, it is successively set with rotor fastening nut 21, third angular contact from the bottom to top
Ball bearing 22, second bearing lubricating sleeve 23, fourth angle contact ball bearing 24, bearing pre-fastening automatic adjusting mechanism 19 and bearing axis
To stop nut 25, the inner ring of third angular contact ball bearing 22 and fourth angle contact ball bearing 24 is connect with 1 interference of main shaft, third
The outer ring of angular contact ball bearing 22 and fourth angle contact ball bearing 24 is connected by the second fixing sleeve of bearing outer ring 26 and 2 interference of shell
It connects, the second bearing lubricating sleeve 23 and bearing pre-fastening automatic adjusting mechanism 19 and 26 interference of the second fixing sleeve of bearing outer ring connect
It connects；The bearing axial limiting nut 25 is threadedly coupled with the second fixing sleeve of bearing outer ring 26；The main shaft 1 is hollow shaft,
Pull rod 27 is equipped in the centre bore of main shaft 1,27 top of pull rod extends the upper aperture of main shaft 1, is equipped with drawing on 27 top of pull rod
Bar axial limiting nut 28 is set with disc spring 29 on 1 top of main shaft, is provided between pull rod axial direction stop nut 28 and disc spring 29
Power transmission casing 30；3 lower surface of upper end cover right above the pull rod 27 is equipped with hydraulic cylinder 31, the piston rod court of hydraulic cylinder 31
Under, and the piston rod of hydraulic cylinder 31 and 27 top face of pull rod are arranged；Ultrasonic wave hair is successively fixed in 27 bottom end of pull rod
Raw device 32, amplitude transformer 33 and knife handle retaining mechanism 34, knife handle retaining mechanism 34 are used cooperatively with knife handle 35.
It is provided with the first oil leab 36 in first fixing sleeve of bearing outer ring 20, is set in the switching sleeve 15
It is equipped with the second oil leab 37, the oil outlet of the first oil leab 36 is communicated with first bearing lubricating sleeve 17, the first oil leab
36 oil inlet end is communicated with the oil outlet of the second oil leab 37, is equipped with the first lubrication in the oil inlet end of the second oil leab 37
Oil connects mouth 38.
Electro spindle Wiring port 39 is installed on the upper end cover 3；It is set in second fixing sleeve of bearing outer ring 26
It is equipped with third oil leab 40, the oil outlet of third oil leab 40 is communicated with second bearing lubricating sleeve 23, on the shell 2
The 4th oil leab 41 is offered, the oil inlet end of third oil leab 40 is communicated with the oil outlet of the 4th oil leab 41, and the 4th
The oil inlet end of oil leab 41 is equipped with the second lubricating oil and connects mouth 42.
It is additionally provided with annular cooling water slot 43 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 44 and annular cooling water slot water outlet water channel 45, and annular cooling water slot water inlet water
There is 180 ° of angle between road 44 and annular cooling water slot water outlet water channel 45.
The bearing pre-fastening automatic adjusting mechanism 19 includes piezoelectric ceramics column 46, piezoelectric ceramics column fixing seat 47, piezoelectricity
Ceramics pole radial positioning disk 48, the first force transmiting disk 49, spring 50, the second force transmiting disk 51 and temperature sensor 52；Piezoelectric ceramics column
Fixing seat 47, piezoelectric ceramics column radial positioning disk 48, the first force transmiting disk 49 and the equal interference of the second force transmiting disk 51 are connected to outside bearing
It encloses on the second fixing sleeve 26；46 quantity of piezoelectric ceramics column is several, and several piezoelectric ceramics columns 46 are in piezoelectric ceramics column fixing seat
It is circumferentially uniformly arranged on 38；Piezoelectric ceramics column location hole, piezoelectricity pottery are offered on the piezoelectric ceramics column radial positioning disk 39
Porcelain knob 46 is abutted against with the first force transmiting disk 49 across piezoelectric ceramics column location hole and is contacted；The spring 50 is connected to the first force transmiting disk 49
Between the second force transmiting disk 51, the second force transmiting disk 51 abuts against contact on the outer ring of fourth angle contact ball bearing 24；The spring
50 quantity are several, and several springs 50 are circumferentially uniformly arranged between the first force transmiting disk 49 and the second force transmiting disk 51；The temperature passes
Sensor 52 is mounted on the second force transmiting disk 51, and piezoelectric ceramics column 46 is axial by the temperature data adjustment that temperature sensor 52 is fed back
Elongation carries out the automatic adjustment of bearing pre-fastening by adjusting 46 axial elongation of piezoelectric ceramics column.
In machining center in operational process, temperature factor is to influence the primary factor of machining accuracy, in order to reduce in processing
The fever behavior of heart ultrasonic wave 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, and the temperature of rotor is effectively reduced, from
And the adverse effect that the fever high temperature for reducing rotor generates main shaft 1 and bearing.In addition, in addition to rotor loss generates heat this
Influence factor, there are also the frictional heating of bearing itself, the utility model is for the also individually designed water cooling knot of bearing friction fever
Structure, while lubrication system is devised for all bearings, it is aided with water-cooling while reducing bearing friction degree, it is maximum
Degree limits the frictional heating of bearing.
Above-mentioned means are all, the utmostly thermal deformations of alleviation bearing quickly raised for preventing bearing temperature from occurring,
But continues to improve with revolving speed, the effect for alleviating bearing thermal deformation can be played by way of water-cooling and bearing lubrication
It can gradually decrease, at this time in order to guarantee the machine finish under high-speed state, the bearing pre-fastening of the utility model is automatic
Regulating mechanism 19 will gradually work.With the raising of revolving 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,
First by the temperature sensor 52 in bearing pre-fastening automatic adjusting mechanism 19 come real-time monitoring bearing temperature, and will supervise in real time
The bearing temperature data feedback measured exports control signal to machine tool numerical control system, then by machine tool numerical control system, and piezoelectricity is made to make pottery
The elongation of porcelain knob 46 changes, and to generate suitable bearing pre-fastening, utmostly reduces because bearing thermal deformation is to adding
The influence that work precision generates, to ensure that the basicly stable of bearing support precision, the final high speed for machining center develops
Provide powerful guarantee.
Scheme in embodiment is not the scope of patent protection to limit the utility model, all without departing from the utility model
Carried out by equivalence enforcement or change, be both contained in the scope of the patents of this case.
Claims (5)
1. a kind of machining center ultrasonic wave electro spindle for having self-adjustable bearing pretightning force, it is characterised in that: including main shaft, shell
Body, upper end cover, lower cover, rotor coil, stator coil；The rotor coil is fixedly set in the middle part of main shaft, the stator line
Circle is fixedly mounted on shell inner surface, and the first cooling jacket is added between stator coil and shell, in the first cooling jacket
The housing outer surface of place axial positions adds the second cooling jacket；The first spiral shell is provided in first cooling jacket
Cooling water channel is revolved, the first spiral cooling water channel water inlet and the first spiral cooling water channel water outlet are arranged on shell；Institute
It states and is provided with the second spiral cooling water channel in the second cooling jacket, the second spiral cooling water channel water inlet and the second spiral cooling water
Road water outlet is set up directly on the second cooling jacket；It is cooling in the first spiral cooling water channel water inlet, the first spiral
Cooling water is mounted on water channel water outlet, the second spiral cooling water channel water inlet and the second spiral cooling water channel water outlet to connect
Mouth；The upper end cover is packed in housing tip nozzle, and the lower cover is packed in housing bottom nozzle, and lower cover and shell it
Between add switching sleeve, the main shaft sequentially passes through switching sleeve and lower cover and extends to hull outside；In the lower end
Cover rotor coil between main shaft on, be successively set with from the bottom to top the first angular contact ball bearing, first bearing lubricating sleeve and
The inner ring of second angular contact ball bearing, the first angular contact ball bearing and the second angular contact ball bearing is connect with main shaft interference, and first
The outer ring of angular contact ball bearing and the second angular contact ball bearing passes through the first fixing sleeve of bearing outer ring and switching sleeve inner surface mistake
It is full of connection；On the main shaft above the rotor coil, it is successively set with rotor fastening nut, third angular contact ball from the bottom to top
Bearing, second bearing lubricating sleeve, fourth angle contact ball bearing, bearing pre-fastening automatic adjusting mechanism and bearing axial limiting spiral shell
The inner ring of mother, third angular contact ball bearing and fourth angle contact ball bearing is connect with main shaft interference, third angular contact ball bearing and
The outer ring of fourth angle contact ball bearing is connect by the second fixing sleeve of bearing outer ring with shell interference, the second bearing lubricating sleeve
And bearing pre-fastening automatic adjusting mechanism is connect with bearing outer ring the second fixing sleeve interference；The bearing axial limiting nut and axis
The second fixing sleeve of bearing outer-ring is threadedly coupled；The main shaft is hollow shaft, pull rod is equipped in the centre bore of main shaft, pull rod top is prolonged
The upper aperture for stretching out main shaft, is equipped with pull rod axial direction stop nut on pull rod top, is set with disc spring, pull rod shaft on main shaft top
To being provided with power transmission casing between stop nut and disc spring；Upper end cover lower surface right above the pull rod is equipped with hydraulic
Cylinder, downward, and the piston rod of hydraulic cylinder and pull rod top face are arranged the piston rod of hydraulic cylinder；It is successively solid in the pull rod bottom end
It is connected with supersonic generator, amplitude transformer and knife handle retaining mechanism, knife handle retaining mechanism is used cooperatively with knife handle.
2. a kind of machining center ultrasonic wave electro spindle for having self-adjustable bearing pretightning force according to claim 1,
It is characterized in that: being provided with the first oil leab in first fixing sleeve of bearing outer ring, be provided in the switching sleeve
The oil outlet of second oil leab, the first oil leab is communicated with first bearing lubricating sleeve, the oil inlet end of the first oil leab with
The oil outlet of second oil leab communicates, and is equipped with the first lubricating oil in the oil inlet end of the second oil leab and connects mouth.
3. a kind of machining center ultrasonic wave electro spindle for having self-adjustable bearing pretightning force according to claim 1,
It is characterized in that: electro spindle Wiring port is installed on the upper end cover；It is provided in second fixing sleeve of bearing outer ring
The oil outlet of third oil leab, third oil leab is communicated with second bearing lubricating sleeve, offers the 4th on the housing
Oil leab, the oil inlet end of third oil leab are communicated with the oil outlet of the 4th oil leab, the oil inlet end of the 4th oil leab
Second lubricating oil is installed and connects mouth.
4. a kind of machining center ultrasonic wave electro spindle for having self-adjustable bearing pretightning force according to claim 1,
It is characterized in that: being additionally provided with annular cooling water slot in first fixing sleeve of bearing outer ring, on the switching sleeve respectively
It is provided 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
Cooling trough is discharged the angle between water channel with 180 °.
5. a kind of machining center ultrasonic wave electro spindle for having self-adjustable bearing pretightning force according to claim 1,
Be characterized in that: the bearing pre-fastening automatic adjusting mechanism includes piezoelectric ceramics column, piezoelectric ceramics column fixing seat, piezoelectric ceramics column
Radial positioning disk, the first force transmiting disk, spring, the second force transmiting disk and temperature sensor；Piezoelectric ceramics column fixing seat, piezoelectric ceramics column
Radial positioning disk, the first force transmiting disk and the equal interference of the second force transmiting disk are connected on the second fixing sleeve of bearing outer ring；The piezoelectricity pottery
Porcelain knob quantity is several, and several piezoelectric ceramics columns are circumferentially uniformly arranged in piezoelectric ceramics column fixing seat；In the piezoelectric ceramics column
Piezoelectric ceramics column location hole is offered on radial positioning disk, piezoelectric ceramics column passes through piezoelectric ceramics column location hole and the first force transmiting disk
Abut against contact；The spring is connected between the first force transmiting disk and the second force transmiting disk, and the second force transmiting disk abuts against contact in fourth angle
On the outer ring of contact ball bearing；The number of springs is several, and several springs are circumferential between the first force transmiting disk and the second force transmiting disk
It is uniformly arranged；The temperature sensor is mounted on the second force transmiting disk, the temperature that piezoelectric ceramics column is fed back by temperature sensor
Data point reuse 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 |
|---|---|---|---|
| CN201820350370.1U CN208214352U (en) | 2018-03-14 | 2018-03-14 | A kind of machining center ultrasonic wave electro spindle having self-adjustable bearing pretightning force |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820350370.1U CN208214352U (en) | 2018-03-14 | 2018-03-14 | A kind of machining center ultrasonic wave electro spindle having self-adjustable bearing pretightning force |
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| Publication Number | Publication Date |
|---|---|
| CN208214352U true CN208214352U (en) | 2018-12-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820350370.1U Expired - Fee Related CN208214352U (en) | 2018-03-14 | 2018-03-14 | A kind of machining center ultrasonic wave electro spindle having self-adjustable bearing pretightning force |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108161036A (en) * | 2018-03-14 | 2018-06-15 | 沈阳建筑大学 | A kind of machining center ultrasonic wave electro spindle for having self-adjustable bearing pretightning force |
| CN110732909A (en) * | 2019-10-25 | 2020-01-31 | 珠海格力电器股份有限公司 | Electric spindle bearing pre-tightening device, electric spindle and machine tool |
| CN110756830A (en) * | 2019-11-15 | 2020-02-07 | 重庆工商大学 | Intelligent high-speed motorized spindle integrating multi-parameter detection |
| 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 |
-
2018
- 2018-03-14 CN CN201820350370.1U patent/CN208214352U/en not_active Expired - Fee Related
Cited By (7)
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| CN108161036A (en) * | 2018-03-14 | 2018-06-15 | 沈阳建筑大学 | A kind of machining center ultrasonic wave electro spindle for having self-adjustable bearing pretightning force |
| CN108161036B (en) * | 2018-03-14 | 2023-06-06 | 沈阳建筑大学 | Machining center ultrasonic electric spindle with automatic bearing pretightening force adjustment function |
| CN110732909A (en) * | 2019-10-25 | 2020-01-31 | 珠海格力电器股份有限公司 | Electric spindle bearing pre-tightening device, electric spindle and machine tool |
| CN110756830A (en) * | 2019-11-15 | 2020-02-07 | 重庆工商大学 | Intelligent high-speed motorized spindle integrating multi-parameter detection |
| CN110756830B (en) * | 2019-11-15 | 2022-03-18 | 重庆工商大学 | Intelligent high-speed motorized spindle integrating multi-parameter detection |
| 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 |
| CN116493618B (en) * | 2023-06-28 | 2023-09-05 | 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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