CN104100637B - Protection mechanism and lathe with the supporting dynamic and hydrostatic bearing of machine tool chief axis - Google Patents
Protection mechanism and lathe with the supporting dynamic and hydrostatic bearing of machine tool chief axis Download PDFInfo
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- CN104100637B CN104100637B CN201410361190.XA CN201410361190A CN104100637B CN 104100637 B CN104100637 B CN 104100637B CN 201410361190 A CN201410361190 A CN 201410361190A CN 104100637 B CN104100637 B CN 104100637B
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Abstract
The invention discloses protection mechanism and the lathe a kind of and dynamic and hydrostatic bearing that machine tool chief axis is supporting, protection mechanism comprises, hollow shaft, the bearing base connecting with hollow shaft, and machine tool chief axis, hollow shaft is provided with rear dynamic and hydrostatic bearing in the one end near bearing base; Also comprise and being arranged on outside machine tool chief axis, and be positioned at back pressure hydrostatic bearing oil pocket piece and the forward thrust hydrostatic bearing oil pocket piece of the both sides up and down of main shaft thrust shaft; Rear packing ring; Upper gasket; Position near rear dynamic and hydrostatic bearing oil pocket piece between bearing base and machine tool chief axis is provided with the first protection bearing; between machine tool chief axis and hollow shaft, near back pressure hydrostatic bearing oil pocket piece, the second protection bearing is installed, between machine tool chief axis and forward thrust hydrostatic bearing oil pocket piece, near rear packing ring, the 3rd protection bearing is installed. Lathe, comprises machine body, also comprises protection mechanism. That the present invention has is simple in structure, cost is low, easy for installation, protect effective, extend the lathe beneficial effect in service life.
Description
Technical field
The present invention relates to the protection mechanism a kind of and dynamic and hydrostatic bearing that machine tool chief axis is supporting, and applied the lathe of this protection mechanism, belong to machining equipment field.
Background technology
Dynamic and hydrostatic bearing has good rigidity, kinematic accuracy and vibration resistance, is the key components and parts of present main flow high precision machine tool. Under normal circumstances, this dynamic and hydrostatic bearing can maintain the normal operation of axis system, but coordinate the oil supply system more complicated of this axis system, in the time that the flow controller in oil supply system breaks down, to cause system imbalance, there is the scuffing of dynamic and hydrostatic bearing and main shaft, thereby cause lathe to damage, need to spend a large amount of manpowers and go maintenance.
Summary of the invention
The present invention, according to above deficiency, provides the protection mechanism a kind of and dynamic and hydrostatic bearing that machine tool chief axis is supporting. mainly to have increased by the first protection bearing, the second protection bearing and the 3rd protection bearing, under normal circumstances, when in the normal situation of hydraulic system, these three protection bearings axially and are not radially stressing, now, these three protection bearings are in idling conditions, service life is very long, but in the time there is hydraulic pressure reduction fault, due to these three protection bearings in precision axially and radially higher than dynamic and hydrostatic bearing, now, these three protection bearings replace dynamic and hydrostatic bearing to support machine tool chief axis rotation, thereby make dynamic and hydrostatic bearing exempt to bear pressure, ensure that dynamic and hydrostatic bearing can not rub with machine tool chief axis, avoid scuffing, again due to, the time remaining time that fault occurs can not be grown, therefore, these three protection bearings do not need to select the bearing of relatively large number, also can bear at short notice this pressure.
Technical scheme of the present invention is:
A protection mechanism with the supporting dynamic and hydrostatic bearing of machine tool chief axis, comprises,
Hollow shaft, the bearing base connecting with hollow shaft, be placed in the machine tool chief axis in this hollow shaft and bearing base, and hollow shaft is provided with rear dynamic and hydrostatic bearing in the one end near bearing base; Also comprise,
Back pressure hydrostatic bearing oil pocket piece, forward thrust hydrostatic bearing oil pocket piece, back pressure hydrostatic bearing oil pocket piece and forward thrust hydrostatic bearing oil pocket piece are arranged on outside machine tool chief axis, and are positioned at the both sides up and down of main shaft thrust shaft;
Rear packing ring, is machine tool chief axis in it, and its periphery is forward thrust hydrostatic bearing oil pocket piece, is main shaft thrust shaft on it;
Upper gasket, is machine tool chief axis in it, and it is outer is back pressure hydrostatic bearing oil pocket piece, and it is lower is main shaft thrust shaft;
Position near rear dynamic and hydrostatic bearing oil pocket piece between bearing base and machine tool chief axis is provided with the first protection bearing, between machine tool chief axis and hollow shaft, near back pressure hydrostatic bearing oil pocket piece, the second protection bearing is installed, between machine tool chief axis and forward thrust hydrostatic bearing oil pocket piece, near rear packing ring, the 3rd protection bearing is installed, wherein, under the state without hydraulic pressure, the radial clearance of the first protection bearing and machine tool chief axis is less than the radial clearance of rear dynamic and hydrostatic bearing and machine tool chief axis, the radial clearance of the second protection bearing and the 3rd protection bearing is less than the radial clearance of front dynamic and hydrostatic bearing and machine tool chief axis, the end play of the second protection bearing and upper gasket is less than the end play of back pressure hydrostatic bearing oil pocket piece and main shaft, the end play of the 3rd protection bearing and rear packing ring is less than the end play of forward thrust hydrostatic bearing oil pocket piece and machine tool chief axis.
It should be noted that, when the hydraulic pressure of lathe is normal, the precision of electric machine main shaft is quite high, and three protection bearings that increase do not stress.
As preferably, described the first protection bearing is deep groove ball bearing.
As preferably, described the second protection bearing is angular contact bearing.
As preferably, described the 3rd protection bearing is angular contact bearing.
As preferably, described the 3rd protection bearing is angular contact bearing.
The invention also discloses a kind of lathe, comprise machine body, also comprise the protection mechanism described and dynamic and hydrostatic bearing that machine tool chief axis is supporting.
As long as lathe is that the unit head that belongs to dynamic and static pressure all can use the technology of the present invention.
That the present invention has is simple in structure, cost is low, easy for installation, protect effective, extend the lathe beneficial effect in service life.
Brief description of the drawings
Fig. 1 is overall structure schematic diagram of the present invention.
Detailed description of the invention
Now the present invention is further illustrated by reference to the accompanying drawings:
As shown in the figure, a protection mechanism with the supporting dynamic and hydrostatic bearing of machine tool chief axis, comprises hollow shaft 5, the bearing base 2 connecting with hollow shaft 5, be placed in the machine tool chief axis 13 in this hollow shaft 5 and bearing base 2, rear dynamic and hydrostatic bearing 4 is installed in hollow shaft 5 one end near bearing base 2; Also comprise, back pressure hydrostatic bearing oil pocket piece 8, forward thrust hydrostatic bearing oil pocket piece 10, back pressure hydrostatic bearing oil pocket piece 8 and forward thrust hydrostatic bearing oil pocket piece 10 are arranged on outside machine tool chief axis 13, and are positioned at the both sides up and down of main shaft thrust block 131;
Rear packing ring 14, is machine tool chief axis 13 in it, and its periphery is forward thrust hydrostatic bearing oil pocket piece 10, is main shaft thrust block 131 on it;
Upper gasket 15, is machine tool chief axis 13 in it, and it is outer is back pressure hydrostatic bearing oil pocket piece 8, and it is lower is main shaft thrust shaft 131;
Position near rear dynamic and hydrostatic bearing 4 between bearing base 2 and machine tool chief axis 13 is provided with the first protection bearing 3, between machine tool chief axis 13 and hollow shaft 5, near back pressure hydrostatic bearing oil pocket piece 8, the second protection bearing 7 is installed, between machine tool chief axis 13 and forward thrust hydrostatic bearing oil pocket piece 10, near rear packing ring 14, the 3rd protection bearing 11 is installed, wherein, the radial clearance of the first protection bearing 3 and machine tool chief axis 13 is less than the radial clearance of rear dynamic and hydrostatic bearing 4 and machine tool chief axis 13, the radial clearance of the second protection bearing 7 and the 3rd protection bearing 11 is less than the radial clearance of front dynamic and hydrostatic bearing 6 and machine tool chief axis 13, the end play of the second protection bearing 7 and upper gasket 15 is less than the end play of back pressure hydrostatic bearing oil pocket piece 8 and main shaft 13, the end play of the 3rd protection bearing 11 and rear packing ring 14 is less than the end play of forward thrust hydrostatic bearing oil pocket piece 10 and machine tool chief axis 13.
In figure, also comprise oil sealing 1, lower oil sealing 12, adjust packing ring 9.
The first protection bearing 3 is deep groove ball bearing.
The second protection bearing 7 is angular contact bearing.
The 3rd protection bearing 11 is angular contact bearing.
The 3rd protection bearing 11 is angular contact bearing.
A kind of lathe, comprises machine body, also comprises the protection mechanism of the supporting dynamic and hydrostatic bearing of above-mentioned and machine tool chief axis.
Claims (6)
1. with the protection mechanism of the supporting dynamic and hydrostatic bearing of machine tool chief axis, comprise,
Hollow shaft (5), the bearing base (2) connecting with hollow shaft (5), be placed in the machine tool chief axis (13) in this hollow shaft (5) and bearing base (2), and hollow shaft (5) is provided with rear dynamic and hydrostatic bearing (4) near in one end of bearing base (2); Also comprise,
Back pressure hydrostatic bearing oil pocket piece (8), forward thrust hydrostatic bearing oil pocket piece (10), back pressure hydrostatic bearing oil pocket piece (8) and forward thrust hydrostatic bearing oil pocket piece (10) are arranged on outside machine tool chief axis (13), and are positioned at the both sides up and down of main shaft thrust block (131);
Rear packing ring (14), is machine tool chief axis (13) in it, and its periphery is forward thrust hydrostatic bearing oil pocket piece (10), is main shaft thrust block (131) on it;
Upper gasket (15), is machine tool chief axis (13) in it, and it is outer is back pressure hydrostatic bearing oil pocket piece (8), and it is lower is main shaft thrust shaft (131);
It is characterized in that: the position near rear dynamic and hydrostatic bearing (4) between bearing base (2) and machine tool chief axis (13) is provided with the first protection bearing (3), between machine tool chief axis (13) and hollow shaft (5), near back pressure hydrostatic bearing oil pocket piece (8), the second protection bearing (7) is installed, between machine tool chief axis (13) and forward thrust hydrostatic bearing oil pocket piece (10), near rear packing ring (14), the 3rd protection bearing (11) is installed, wherein, the radial clearance of the first protection bearing (3) and machine tool chief axis (13) is less than the radial clearance of rear dynamic and hydrostatic bearing (4) and machine tool chief axis (13), the radial clearance of the second protection bearing (7) and the 3rd protection bearing (11) is less than the radial clearance of front dynamic and hydrostatic bearing (6) and machine tool chief axis (13), the end play of the second protection bearing (7) and upper gasket (15) is less than the end play of back pressure hydrostatic bearing oil pocket piece (8) and main shaft (13), the end play of the 3rd protection bearing (11) and rear packing ring (14) is less than the end play of forward thrust hydrostatic bearing oil pocket piece (10) and machine tool chief axis (13).
2. the protection mechanism of the supporting dynamic and hydrostatic bearing of a kind of and machine tool chief axis as claimed in claim 1, is characterized in that, described the first protection bearing (3) is deep groove ball bearing.
3. the protection mechanism of the supporting dynamic and hydrostatic bearing of a kind of and machine tool chief axis as claimed in claim 1 or 2, is characterized in that, described the second protection bearing (7) is angular contact bearing.
4. the protection mechanism of the supporting dynamic and hydrostatic bearing of a kind of and machine tool chief axis as claimed in claim 1 or 2, is characterized in that, described the 3rd protection bearing (11) is angular contact bearing.
5. the protection mechanism of the supporting dynamic and hydrostatic bearing of a kind of and machine tool chief axis as claimed in claim 3, is characterized in that, described the 3rd protection bearing (11) is angular contact bearing.
6. a lathe, comprises machine body, it is characterized in that, also comprises as described in power 1-5 any one and the protection mechanism supporting dynamic and hydrostatic bearing of machine tool chief axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410361190.XA CN104100637B (en) | 2014-07-25 | 2014-07-25 | Protection mechanism and lathe with the supporting dynamic and hydrostatic bearing of machine tool chief axis |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410361190.XA CN104100637B (en) | 2014-07-25 | 2014-07-25 | Protection mechanism and lathe with the supporting dynamic and hydrostatic bearing of machine tool chief axis |
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| Publication Number | Publication Date |
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| CN104100637A CN104100637A (en) | 2014-10-15 |
| CN104100637B true CN104100637B (en) | 2016-05-11 |
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| CN201410361190.XA Active CN104100637B (en) | 2014-07-25 | 2014-07-25 | Protection mechanism and lathe with the supporting dynamic and hydrostatic bearing of machine tool chief axis |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110729842A (en) * | 2019-09-03 | 2020-01-24 | 西安中车永电捷力风能有限公司 | Novel motor bearing protective structure |
| CN113124055B (en) * | 2021-04-27 | 2023-03-14 | 北京工业大学 | Air-float thrust bearing based on radial dense-bead adsorption |
| CN115095592A (en) * | 2022-07-26 | 2022-09-23 | 台州伟志机床股份有限公司 | Impact-resistant long-life dynamic pressure main shaft |
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| CN102814733A (en) * | 2012-08-08 | 2012-12-12 | 东南大学 | Large-size end surface processing electric spindle for mixed support of hydrostatic bearing and rolling bearing |
| CN103846459A (en) * | 2014-02-25 | 2014-06-11 | 上海大学 | Electric main shaft supported by hydrostatic integrated gas bearing |
| CN203979142U (en) * | 2014-07-25 | 2014-12-03 | 温州华聚科技有限公司 | Protection mechanism and lathe with the supporting dynamic and hydrostatic bearing of machine tool chief axis |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6031842Y2 (en) * | 1980-11-12 | 1985-09-24 | 株式会社日立製作所 | Machine Tools |
| JPH09150336A (en) * | 1995-11-24 | 1997-06-10 | Toyoda Mach Works Ltd | Spindle device |
| JP2000110836A (en) * | 1998-10-06 | 2000-04-18 | Ntn Corp | Static pressure bearing device |
| CN2578046Y (en) * | 2002-10-22 | 2003-10-08 | 无锡机床股份有限公司 | Four tile style hydrodynamic bearing spindle structure |
| CN200982355Y (en) * | 2006-12-05 | 2007-11-28 | 李颖仲 | Bush type active and static pressure bearing rolling unloading transmission shaft |
| CN101586619A (en) * | 2009-06-26 | 2009-11-25 | 西安交通大学 | Sliding-rolling composite bearing device |
| CN102661323A (en) * | 2012-05-17 | 2012-09-12 | 焦正玉 | Hydrostatic bearing |
| CN102814733A (en) * | 2012-08-08 | 2012-12-12 | 东南大学 | Large-size end surface processing electric spindle for mixed support of hydrostatic bearing and rolling bearing |
| CN103846459A (en) * | 2014-02-25 | 2014-06-11 | 上海大学 | Electric main shaft supported by hydrostatic integrated gas bearing |
| CN203979142U (en) * | 2014-07-25 | 2014-12-03 | 温州华聚科技有限公司 | Protection mechanism and lathe with the supporting dynamic and hydrostatic bearing of machine tool chief axis |
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| CN104100637A (en) | 2014-10-15 |
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Effective date of registration: 20200116 Address after: 210000 No.6 Longhua Road, Liuhe Economic Development Zone, Nanjing City, Jiangsu Province Patentee after: NANJING LIJU PRECISION FORGING CO., LTD. Address before: 325207 Zhejiang Province, Wenzhou City Feiyun Ruian Economic Development Zone by two District Road No. 1 Patentee before: Wenzhou Huaju Technology Co., Ltd. |