CN2046779U - Precision principal axis system with adjustable pre-load hollow cylinder roller bearing - Google Patents
Precision principal axis system with adjustable pre-load hollow cylinder roller bearing Download PDFInfo
- Publication number
- CN2046779U CN2046779U CN 89200614 CN89200614U CN2046779U CN 2046779 U CN2046779 U CN 2046779U CN 89200614 CN89200614 CN 89200614 CN 89200614 U CN89200614 U CN 89200614U CN 2046779 U CN2046779 U CN 2046779U
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- CN
- China
- Prior art keywords
- bearing
- main shaft
- roller
- roller bearing
- hollow
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The utility model discloses a |precision principal axis system with adjustable pre-load hollow cylinder roller bearing used to bear a spindle for machine tool; the shafting rotation precision is improved, the rigidity and the vibration resistance are increased, the noise is reduced, and the temperature is raised. The utility model can keep the shafting accuracy for a long time, which is mainly used for lathes, milling machines, boring machines, machining centers, etc., and can also be used for an accurate spindle of machine tools or other products.
Description
The utility model relates to lathe accurate main shaft system.Be used for lathe transferring power such as lathe, milling machine, boring machine, machining center, machining is carried out in accurate rotation.Belong to B23B19/02.
Machine tool chief axis such as known lathe, milling machine, boring machine, machining center supportings is many by general double row centripetal cylindrical roller bearing and 60 ° of two-way angular contact thrust ball bearings or angular contact ball bearing, combinations such as thrust bearing.The former mainly bears radial load and guarantees running accuracy, and the latter mainly bears axial load.The deficiency of this main shaft system is low in running accuracy, rigidity and shock resistance are poor, and noise is big, temperature rise, life-span are short.
The utility model task is to set up a kind of novel lathe accurate main shaft system, overcomes the deficiency of machine tool chief axis systems such as above-mentioned known lathe, milling machine, boring machine, machining center.The key that task solves is that the hollow cylindrical roller bearing with preload replaces general double row centripetal cylindrical roller bearing, reaches and improves running accuracy, rigidity and vibration resistance, the purpose of reduction noise and temperature rise.Adjusting of preload amount also is the means that prolong the bearing Acceptable life.
Details of the present utility model, advantage and feature further specify with the following example and accompanying drawing.But they only are the part embodiment in the claimed scope of the utility model, and are whole anything but.
Fig. 1 be the utility model in lathe, use cut open example.Fig. 2, Fig. 3 are respectively the example of using of cuing open in milling machine, boring machine or machining center.
By the main shaft of the utility model shown in figure system by main shaft (5), outer race (2), hollow cylindrical roller (3), bearing inner ring (4), adjust parts such as nut (1) or adjusting pad (cover) (8) and other transmissions, sealing, bearing and form.Axle system is installed in casing or the sleeve (7).Between outer race (2) and casing or sleeve (7) is interference fit.Its roller aperture of hollow cylindrical roller (3) is that required quiet rigidity of bearing capacity and vibration resistance requirement and dynamic flexibility serve as to determine according to optimizing with the roller outer diameter ratio to satisfy machine tool chief axis.Match with the 1:12 conical surface (6) between bearing inner ring (4) and main shaft (5).With adjusting nut (1) or adjusting pad (cover) (8), bearing inner ring (4) is moved axially and the radial deformation that produces can be adjusted the preload amount of hollow roller between the bearing inner and outer rings, thus 3～5 times of the useful lives of prolongation bearing.The architectural feature of the used preload hollow cylindrical roller bearing of the utility model also is not have retainer between roller, and its space is filled by the roller of greater number, and stand under load roller quantity is more relatively simultaneously in the bearing operation, rolling element envelope path accuracy height.Compare with the entity roller in the general double row centripetal cylindrical roller bearing, an amount of flexibility of hollow roller makes rolling element diameter decentralization and circularity reduce the influence degree of running accuracy.The running accuracy of axle system can reach below 3 microns.Because hollow roller has the bigger damping ratio ratio of critical damping coefficient (damped coefficient with) than the entity roller, the dynamic stiffness (vibration resistance) of main shaft is improved.In addition, hollow roller makes lubricating oil easily by bearing inside, improves cooling effectiveness, reduces the running temperature rise, has guaranteed the heat endurance of axle system.General double row centripetal cylindrical roller bearing all has end-play.The utility model main shaft is a hollow cylindrical roller bearing, cause receives 2～30 microns suitable preload, its roller is only made pure rolling and fricton-tight phenomenon, thereby not only guaranteed the stable of main axis rotation track (precision), and avoided main shaft roller and raceway bump when shock loading that the destruction and the additional wear of its generation are kept the precision that works long hours of bearing and axle system effectively.Noise in the spindle operation also greatly reduces thus.Certainly, not have the retainer feature also be the important former edge that noise is descended for aforesaid bearing.
The utility model axle is that the lubricated of bearing is the thin oil mode, can be recycle oil stream, also can be immersion oil.
Claims (5)
1, a kind of lathe accurate main shaft is to be made up of parts such as casing (sleeve), main shaft, bearing, adjustment nut (pad, cover) and other transmissions, sealings.It is characterized in that main shaft diameter is to being supported by adjustable preload hollow cylindrical roller bearing, bearing roller be hollow, preloading and can adjusting arranged between raceway, there is not retainer between roller, bearing inner ring and main shaft match with the conical surface, outer race and casing (sleeve) are interference fit, and bearing adopts thin oil lubricant.
2, the main shaft system according to claim 1 is characterized in that annular distance has the 1:12 tapering in the hollow cylindrical roller bearing.
3, the main shaft system according to claim 1 is characterized in that the hollow cylindrical roller bearing roller aperture and the ratio of external diameter are 25%～90%, and hollow roller outer surface bus is straight line or middle convex curve.Bearing roller is 2～4 row.
4, the main shaft system according to claim 1 is characterized in that the preloading of roller is 2～30 microns.
5, the main shaft system according to claim 1 is characterized in that the main shaft axial location adopts rolling bearing or sliding bearing, can be arranged in front-end of spindle or rear end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89200614 CN2046779U (en) | 1989-01-18 | 1989-01-18 | Precision principal axis system with adjustable pre-load hollow cylinder roller bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89200614 CN2046779U (en) | 1989-01-18 | 1989-01-18 | Precision principal axis system with adjustable pre-load hollow cylinder roller bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2046779U true CN2046779U (en) | 1989-11-01 |
Family
ID=4858673
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89200614 Withdrawn CN2046779U (en) | 1989-01-18 | 1989-01-18 | Precision principal axis system with adjustable pre-load hollow cylinder roller bearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2046779U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100549445C (en) * | 2004-07-20 | 2009-10-14 | 布林克曼产品公司 | Be used for DAVENPORT The highi degree of accuracy shaft assembly of automatic screw machine |
| CN101473146B (en) * | 2005-12-14 | 2012-03-21 | 布林克曼产品公司 | Davenport multi-spindle screw machine, and improved tool arm for use therein |
| CN103480864A (en) * | 2012-06-08 | 2014-01-01 | 盐城纺织职业技术学院 | Lathe spindle box with built-in boring device |
| CN106402151A (en) * | 2016-12-21 | 2017-02-15 | 宁波市镇海捷登应用技术研究所 | Combined bearing and rotating shaft device using combined bearing |
| CN110193611A (en) * | 2019-05-24 | 2019-09-03 | 南阳师范学院 | A kind of mixing bearing self-balancing electrical spindle for machine tool structure and its control method |
| CN110653382A (en) * | 2019-10-16 | 2020-01-07 | 德州普利森机床有限公司 | Bearing pre-tightening method for spindle of large-through-hole headstock |
-
1989
- 1989-01-18 CN CN 89200614 patent/CN2046779U/en not_active Withdrawn
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100549445C (en) * | 2004-07-20 | 2009-10-14 | 布林克曼产品公司 | Be used for DAVENPORT The highi degree of accuracy shaft assembly of automatic screw machine |
| CN101473146B (en) * | 2005-12-14 | 2012-03-21 | 布林克曼产品公司 | Davenport multi-spindle screw machine, and improved tool arm for use therein |
| CN103480864A (en) * | 2012-06-08 | 2014-01-01 | 盐城纺织职业技术学院 | Lathe spindle box with built-in boring device |
| CN103480864B (en) * | 2012-06-08 | 2016-06-08 | 盐城纺织职业技术学院 | The Lathe Spindle Box of built-in boring device |
| CN106402151A (en) * | 2016-12-21 | 2017-02-15 | 宁波市镇海捷登应用技术研究所 | Combined bearing and rotating shaft device using combined bearing |
| CN110193611A (en) * | 2019-05-24 | 2019-09-03 | 南阳师范学院 | A kind of mixing bearing self-balancing electrical spindle for machine tool structure and its control method |
| CN110193611B (en) * | 2019-05-24 | 2024-04-16 | 南阳师范学院 | Electric spindle structure of hybrid supporting self-balancing machine tool and control method thereof |
| CN110653382A (en) * | 2019-10-16 | 2020-01-07 | 德州普利森机床有限公司 | Bearing pre-tightening method for spindle of large-through-hole headstock |
| CN110653382B (en) * | 2019-10-16 | 2020-10-16 | 德州普利森机床有限公司 | Bearing pre-tightening method for spindle of large-through-hole headstock |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |